Hi Brian,
On Thu, 3 Sep 2009, Brian King wrote:
> Anil,
>
> Taking a quick scan through the driver, I would suggest you audit your
> logging. Looks like there is a lot of dev_err, where sdev_printk might be
> better,
I hope I am understanding this correct...
I don't see a difference in using dev_err Vs. sdev_printk. B'coz both call
dev_printk except the prefix of KERN_ERR. But I guess even if we use
sdev_printk we will use KERN_ERR anyways. Also both refer "Generic device
interface".
#define dev_err(dev, format, arg...) \
dev_printk(KERN_ERR , dev , format , ## arg)
#define sdev_printk(prefix, sdev, fmt, a...) \
dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
struct scsi_device {
struct device sdev_gendev;
}
and pmcraid_info where sdev_info might be better, etc.
>
Where/what is this sdev_info?
> Thanks,
>
> Brian
>
> Anil Ravindranath wrote:
> > Hello James,
> >
> > Can you please let us know the status of this patch. Can we please get a
> > sign-off/approval of this patch.
> >
> > With regards,
> > Anil
> >
> > ---------- Forwarded message ----------
> > Date: Tue, 25 Aug 2009 17:35:18 -0700 (PDT)
> > From: Anil Ravindranath <anil_ravindranath@xxxxxxxxxxxxxx>
> > To: linux-scsi@xxxxxxxxxxxxxxx, James.Bottomley@xxxxxxxxxxxxxxxxxxxxx
> > Cc: gregkh@xxxxxxx, anil_ravindranath@xxxxxxxxxxxxxx
> > Subject: PATCH: PMC-Sierra MaxRAID driver to support 6Gb/s SAS RAID controller
> >
> >
> > Here is an updated driver patch that incorporates all the latest review
> > inputs.
> >
> > Signed-off-by: Anil Ravindranath <anil_ravindranath@xxxxxxxxxxxxxx>
> >
> > diff -urN -x scsi-misc-2.6/Documentation/dontdiff scsi-misc-2.6.orig/drivers/scsi/Kconfig scsi-misc-2.6/drivers/scsi/Kconfig
> > --- scsi-misc-2.6.orig/drivers/scsi/Kconfig 2009-08-06 13:00:36.000000000 -0700
> > +++ scsi-misc-2.6/drivers/scsi/Kconfig 2009-08-25 12:34:01.000000000 -0700
> > @@ -1811,6 +1811,12 @@
> > called zfcp. If you want to compile it as a module, say M here
> > and read <file:Documentation/kbuild/modules.txt>.
> >
> > +config SCSI_PMCRAID
> > + tristate "PMC SIERRA Linux MaxRAID adapter support"
> > + depends on PCI && SCSI
> > + ---help---
> > + This driver supports the PMC SIERRA MaxRAID adapters.
> > +
> > config SCSI_SRP
> > tristate "SCSI RDMA Protocol helper library"
> > depends on SCSI && PCI
> > diff -urN -x scsi-misc-2.6/Documentation/dontdiff scsi-misc-2.6.orig/drivers/scsi/Makefile scsi-misc-2.6/drivers/scsi/Makefile
> > --- scsi-misc-2.6.orig/drivers/scsi/Makefile 2009-08-06 13:00:35.000000000 -0700
> > +++ scsi-misc-2.6/drivers/scsi/Makefile 2009-08-25 12:32:46.000000000 -0700
> > @@ -130,6 +130,7 @@
> > obj-$(CONFIG_PS3_ROM) += ps3rom.o
> > obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libiscsi.o libiscsi_tcp.o cxgb3i/
> > obj-$(CONFIG_SCSI_BNX2_ISCSI) += libiscsi.o bnx2i/
> > +obj-$(CONFIG_SCSI_PMCRAID) += pmcraid.o
> >
> > obj-$(CONFIG_ARM) += arm/
> >
> > diff -urN -x scsi-misc-2.6/Documentation/dontdiff scsi-misc-2.6.orig/drivers/scsi/pmcraid.c scsi-misc-2.6/drivers/scsi/pmcraid.c
> > --- scsi-misc-2.6.orig/drivers/scsi/pmcraid.c 1969-12-31 16:00:00.000000000 -0800
> > +++ scsi-misc-2.6/drivers/scsi/pmcraid.c 2009-08-25 12:48:54.000000000 -0700
> > @@ -0,0 +1,5604 @@
> > +/*
> > + * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
> > + *
> > + * Written By: PMC Sierra Corporation
> > + *
> > + * Copyright (C) 2008, 2009 PMC Sierra Inc
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation; either version 2 of the License, or
> > + * (at your option) any later version.
> > + *
> > + * This program is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> > + * GNU General Public License for more details.
> > + *
> > + * You should have received a copy of the GNU General Public License
> > + * along with this program; if not, write to the Free Software
> > + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
> > + * USA
> > + *
> > + */
> > +#include <linux/fs.h>
> > +#include <linux/init.h>
> > +#include <linux/types.h>
> > +#include <linux/errno.h>
> > +#include <linux/kernel.h>
> > +#include <linux/ioport.h>
> > +#include <linux/delay.h>
> > +#include <linux/pci.h>
> > +#include <linux/wait.h>
> > +#include <linux/spinlock.h>
> > +#include <linux/sched.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/blkdev.h>
> > +#include <linux/firmware.h>
> > +#include <linux/module.h>
> > +#include <linux/moduleparam.h>
> > +#include <linux/hdreg.h>
> > +#include <linux/version.h>
> > +#include <linux/io.h>
> > +#include <asm/irq.h>
> > +#include <asm/processor.h>
> > +#include <linux/libata.h>
> > +#include <linux/mutex.h>
> > +#include <scsi/scsi.h>
> > +#include <scsi/scsi_host.h>
> > +#include <scsi/scsi_tcq.h>
> > +#include <scsi/scsi_eh.h>
> > +#include <scsi/scsi_cmnd.h>
> > +#include <scsi/scsicam.h>
> > +
> > +#include "pmcraid.h"
> > +
> > +/*
> > + * Module configuration parameters
> > + */
> > +static unsigned int pmcraid_debug_log;
> > +static unsigned int pmcraid_disable_aen;
> > +static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
> > +
> > +/*
> > + * Data structures to support multiple adapters by the LLD.
> > + * pmcraid_adapter_count - count of configured adapters
> > + */
> > +static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
> > +
> > +/*
> > + * Supporting user-level control interface through IOCTL commands.
> > + * pmcraid_major - major number to use
> > + * pmcraid_minor - minor number(s) to use
> > + */
> > +static unsigned int pmcraid_major;
> > +static struct class *pmcraid_class;
> > +DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
> > +
> > +/*
> > + * Module parameters
> > + */
> > +MODULE_AUTHOR("PMC Sierra Corporation, anil_ravindranath@xxxxxxxxxxxxxx");
> > +MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
> > +MODULE_LICENSE("GPL");
> > +MODULE_VERSION(PMCRAID_DRIVER_VERSION);
> > +
> > +module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
> > +MODULE_PARM_DESC(log_level,
> > + "Enables firmware error code logging, default :1 high-severity"
> > + " errors, 2: all errors including high-severity errors,"
> > + " 0: disables logging");
> > +
> > +module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
> > +MODULE_PARM_DESC(debug,
> > + "Enable driver verbose message logging. Set 1 to enable."
> > + "(default: 0)");
> > +
> > +module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
> > +MODULE_PARM_DESC(disable_aen,
> > + "Disable driver aen notifications to apps. Set 1 to disable."
> > + "(default: 0)");
> > +
> > +/* chip specific constants for PMC MaxRAID controllers (same for
> > + * 0x5220 and 0x8010
> > + */
> > +static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
> > + {
> > + .ioastatus = 0x0,
> > + .ioarrin = 0x00040,
> > + .mailbox = 0x7FC30,
> > + .global_intr_mask = 0x00034,
> > + .ioa_host_intr = 0x0009C,
> > + .ioa_host_intr_clr = 0x000A0,
> > + .ioa_host_mask = 0x7FC28,
> > + .ioa_host_mask_clr = 0x7FC28,
> > + .host_ioa_intr = 0x00020,
> > + .host_ioa_intr_clr = 0x00020,
> > + .transop_timeout = 300
> > + }
> > +};
> > +
> > +/*
> > + * PCI device ids supported by pmcraid driver
> > + */
> > +static struct pci_device_id pmcraid_pci_table[] __devinitdata = {
> > + { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
> > + 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
> > + },
> > + {}
> > +};
> > +
> > +MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
> > +
> > +
> > +
> > +/**
> > + * pmcraid_slave_alloc - Prepare for commands to a device
> > + * @scsi_dev: scsi device struct
> > + *
> > + * This function is called by mid-layer prior to sending any command to the new
> > + * device. Stores resource entry details of the device in scsi_device struct.
> > + * Queuecommand uses the resource handle and other details to fill up IOARCB
> > + * while sending commands to the device.
> > + *
> > + * Return value:
> > + * 0 on success / -ENXIO if device does not exist
> > + */
> > +static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
> > +{
> > + struct pmcraid_resource_entry *temp, *res = NULL;
> > + struct pmcraid_instance *pinstance;
> > + u8 target, bus, lun;
> > + unsigned long lock_flags;
> > + int rc = -ENXIO;
> > + pinstance = shost_priv(scsi_dev->host);
> > +
> > + /* Driver exposes VSET and GSCSI resources only; all other device types
> > + * are not exposed. Resource list is synchronized using resource lock
> > + * so any traversal or modifications to the list should be done inside
> > + * this lock
> > + */
> > + spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
> > + list_for_each_entry(temp, &pinstance->used_res_q, queue) {
> > +
> > + /* do not expose VSETs with order-ids >= 240 */
> > + if (RES_IS_VSET(temp->cfg_entry)) {
> > + target = temp->cfg_entry.unique_flags1;
> > + if (target >= PMCRAID_MAX_VSET_TARGETS)
> > + continue;
> > + bus = PMCRAID_VSET_BUS_ID;
> > + lun = 0;
> > + } else if (RES_IS_GSCSI(temp->cfg_entry)) {
> > + target = RES_TARGET(temp->cfg_entry.resource_address);
> > + bus = PMCRAID_PHYS_BUS_ID;
> > + lun = RES_LUN(temp->cfg_entry.resource_address);
> > + } else {
> > + continue;
> > + }
> > +
> > + if (bus == scsi_dev->channel &&
> > + target == scsi_dev->id &&
> > + lun == scsi_dev->lun) {
> > + res = temp;
> > + break;
> > + }
> > + }
> > +
> > + if (res) {
> > + res->scsi_dev = scsi_dev;
> > + scsi_dev->hostdata = res;
> > + res->change_detected = 0;
> > + atomic_set(&res->read_failures, 0);
> > + atomic_set(&res->write_failures, 0);
> > + rc = 0;
> > + }
> > + spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
> > + return rc;
> > +}
> > +
> > +/**
> > + * pmcraid_slave_configure - Configures a SCSI device
> > + * @scsi_dev: scsi device struct
> > + *
> > + * This fucntion is executed by SCSI mid layer just after a device is first
> > + * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
> > + * timeout value (default 30s) will be over-written to a higher value (60s)
> > + * and max_sectors value will be over-written to 512. It also sets queue depth
> > + * to host->cmd_per_lun value
> > + *
> > + * Return value:
> > + * 0 on success
> > + */
> > +static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
> > +{
> > + struct pmcraid_resource_entry *res = scsi_dev->hostdata;
> > +
> > + if (!res)
> > + return 0;
> > +
> > + /* LLD exposes VSETs and Enclosure devices only */
> > + if (RES_IS_GSCSI(res->cfg_entry) &&
> > + scsi_dev->type != TYPE_ENCLOSURE)
> > + return -ENXIO;
> > +
> > + pmcraid_info("configuring %x:%x:%x:%x\n",
> > + scsi_dev->host->unique_id,
> > + scsi_dev->channel,
> > + scsi_dev->id,
> > + scsi_dev->lun);
> > +
> > + if (RES_IS_GSCSI(res->cfg_entry)) {
> > + scsi_dev->allow_restart = 1;
> > + } else if (RES_IS_VSET(res->cfg_entry)) {
> > + scsi_dev->allow_restart = 1;
> > + blk_queue_rq_timeout(scsi_dev->request_queue,
> > + PMCRAID_VSET_IO_TIMEOUT);
> > + blk_queue_max_sectors(scsi_dev->request_queue,
> > + PMCRAID_VSET_MAX_SECTORS);
> > + }
> > +
> > + if (scsi_dev->tagged_supported &&
> > + (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
> > + scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
> > + scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
> > + scsi_dev->host->cmd_per_lun);
> > + } else {
> > + scsi_adjust_queue_depth(scsi_dev, 0,
> > + scsi_dev->host->cmd_per_lun);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
> > + *
> > + * @scsi_dev: scsi device struct
> > + *
> > + * This is called by mid-layer before removing a device. Pointer assignments
> > + * done in pmcraid_slave_alloc will be reset to NULL here.
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
> > +{
> > + struct pmcraid_resource_entry *res;
> > +
> > + res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
> > +
> > + if (res)
> > + res->scsi_dev = NULL;
> > +
> > + scsi_dev->hostdata = NULL;
> > +}
> > +
> > +/**
> > + * pmcraid_change_queue_depth - Change the device's queue depth
> > + * @scsi_dev: scsi device struct
> > + * @depth: depth to set
> > + *
> > + * Return value
> > + * actual depth set
> > + */
> > +static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth)
> > +{
> > + if (depth > PMCRAID_MAX_CMD_PER_LUN)
> > + depth = PMCRAID_MAX_CMD_PER_LUN;
> > +
> > + scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
> > +
> > + return scsi_dev->queue_depth;
> > +}
> > +
> > +/**
> > + * pmcraid_change_queue_type - Change the device's queue type
> > + * @scsi_dev: scsi device struct
> > + * @tag: type of tags to use
> > + *
> > + * Return value:
> > + * actual queue type set
> > + */
> > +static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
> > +{
> > + struct pmcraid_resource_entry *res;
> > +
> > + res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
> > +
> > + if ((res) && scsi_dev->tagged_supported &&
> > + (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
> > + scsi_set_tag_type(scsi_dev, tag);
> > +
> > + if (tag)
> > + scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
> > + else
> > + scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
> > + } else
> > + tag = 0;
> > +
> > + return tag;
> > +}
> > +
> > +
> > +/**
> > + * pmcraid_init_cmdblk - initializes a command block
> > + *
> > + * @cmd: pointer to struct pmcraid_cmd to be initialized
> > + * @index: if >=0 first time initialization; otherwise reinitialization
> > + *
> > + * Return Value
> > + * None
> > + */
> > +void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
> > +{
> > + struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
> > + dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
> > +
> > + if (index >= 0) {
> > + /* first time initialization (called from probe) */
> > + u32 ioasa_offset =
> > + offsetof(struct pmcraid_control_block, ioasa);
> > +
> > + cmd->index = index;
> > + ioarcb->response_handle = cpu_to_le32(index << 2);
> > + ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
> > + ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
> > + ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
> > + } else {
> > + /* re-initialization of various lengths, called once command is
> > + * processed by IOA
> > + */
> > + memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
> > + ioarcb->request_flags0 = 0;
> > + ioarcb->request_flags1 = 0;
> > + ioarcb->cmd_timeout = 0;
> > + ioarcb->ioarcb_bus_addr &= (~0x1FULL);
> > + ioarcb->ioadl_bus_addr = 0;
> > + ioarcb->ioadl_length = 0;
> > + ioarcb->data_transfer_length = 0;
> > + ioarcb->add_cmd_param_length = 0;
> > + ioarcb->add_cmd_param_offset = 0;
> > + cmd->ioa_cb->ioasa.ioasc = 0;
> > + cmd->ioa_cb->ioasa.residual_data_length = 0;
> > + cmd->u.time_left = 0;
> > + }
> > +
> > + cmd->cmd_done = NULL;
> > + cmd->scsi_cmd = NULL;
> > + cmd->release = 0;
> > + cmd->completion_req = 0;
> > + cmd->dma_handle = 0;
> > + init_timer(&cmd->timer);
> > +}
> > +
> > +/**
> > + * pmcraid_reinit_cmdblk - reinitialize a command block
> > + *
> > + * @cmd: pointer to struct pmcraid_cmd to be reinitialized
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
> > +{
> > + pmcraid_init_cmdblk(cmd, -1);
> > +}
> > +
> > +/**
> > + * pmcraid_get_free_cmd - get a free cmd block from command block pool
> > + * @pinstance: adapter instance structure
> > + *
> > + * Return Value:
> > + * returns pointer to cmd block or NULL if no blocks are available
> > + */
> > +static struct pmcraid_cmd *pmcraid_get_free_cmd(
> > + struct pmcraid_instance *pinstance
> > +)
> > +{
> > + struct pmcraid_cmd *cmd = NULL;
> > + unsigned long lock_flags;
> > +
> > + /* free cmd block list is protected by free_pool_lock */
> > + spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
> > +
> > + if (!list_empty(&pinstance->free_cmd_pool)) {
> > + cmd = list_entry(pinstance->free_cmd_pool.next,
> > + struct pmcraid_cmd, free_list);
> > + list_del(&cmd->free_list);
> > + }
> > + spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
> > +
> > + /* Initialize the command block before giving it the caller */
> > + if (cmd != NULL)
> > + pmcraid_reinit_cmdblk(cmd);
> > + return cmd;
> > +}
> > +
> > +/**
> > + * pmcraid_return_cmd - return a completed command block back into free pool
> > + * @cmd: pointer to the command block
> > + *
> > + * Return Value:
> > + * nothing
> > + */
> > +void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + unsigned long lock_flags;
> > +
> > + spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
> > + list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
> > + spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
> > +}
> > +
> > +/**
> > + * pmcraid_read_interrupts - reads IOA interrupts
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * Return value
> > + * interrupts read from IOA
> > + */
> > +static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
> > +{
> > + return ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
> > +}
> > +
> > +/**
> > + * pmcraid_disable_interrupts - Masks and clears all specified interrupts
> > + *
> > + * @pinstance: pointer to per adapter instance structure
> > + * @intrs: interrupts to disable
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void pmcraid_disable_interrupts(
> > + struct pmcraid_instance *pinstance,
> > + u32 intrs
> > +)
> > +{
> > + u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
> > + u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
> > +
> > + iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
> > + iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
> > + iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg);
> > + ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
> > +}
> > +
> > +/**
> > + * pmcraid_enable_interrupts - Enables specified interrupts
> > + *
> > + * @pinstance: pointer to per adapter instance structure
> > + * @intr: interrupts to enable
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void pmcraid_enable_interrupts(
> > + struct pmcraid_instance *pinstance,
> > + u32 intrs
> > +)
> > +{
> > + u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
> > + u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
> > +
> > + iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
> > + iowrite32(~intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg);
> > + ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
> > +
> > + pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
> > + ioread32(pinstance->int_regs.global_interrupt_mask_reg),
> > + ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
> > +}
> > +
> > +/**
> > + * pmcraid_reset_type - Determine the required reset type
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * IOA requires hard reset if any of the following conditions is true.
> > + * 1. If HRRQ valid interrupt is not masked
> > + * 2. IOA reset alert doorbell is set
> > + * 3. If there are any error interrupts
> > + */
> > +static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
> > +{
> > + u32 mask;
> > + u32 intrs;
> > + u32 alerts;
> > +
> > + mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
> > + intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
> > + alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
> > +
> > + if ((mask & INTRS_HRRQ_VALID) == 0 ||
> > + (alerts & DOORBELL_IOA_RESET_ALERT) ||
> > + (intrs & PMCRAID_ERROR_INTERRUPTS)) {
> > + pmcraid_info("IOA requires hard reset\n");
> > + pinstance->ioa_hard_reset = 1;
> > + }
> > +
> > + /* If unit check is active, trigger the dump */
> > + if (intrs & INTRS_IOA_UNIT_CHECK)
> > + pinstance->ioa_unit_check = 1;
> > +}
> > +
> > +/**
> > + * pmcraid_bist_done - completion function for PCI BIST
> > + * @cmd: pointer to reset command
> > + * Return Value
> > + * none
> > + */
> > +
> > +static void pmcraid_ioa_reset(struct pmcraid_cmd *);
> > +
> > +static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + unsigned long lock_flags;
> > + int rc;
> > + u16 pci_reg;
> > +
> > + rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
> > +
> > + /* If PCI config space can't be accessed wait for another two secs */
> > + if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
> > + cmd->u.time_left > 0) {
> > + pmcraid_info("BIST not complete, waiting another 2 secs\n");
> > + cmd->timer.expires = jiffies + cmd->u.time_left;
> > + cmd->u.time_left = 0;
> > + cmd->timer.data = (unsigned long)cmd;
> > + cmd->timer.function =
> > + (void (*)(unsigned long))pmcraid_bist_done;
> > + add_timer(&cmd->timer);
> > + } else {
> > + cmd->u.time_left = 0;
> > + pmcraid_info("BIST is complete, proceeding with reset\n");
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > + pmcraid_ioa_reset(cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_start_bist - starts BIST
> > + * @cmd: pointer to reset cmd
> > + * Return Value
> > + * none
> > + */
> > +static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + u32 doorbells, intrs;
> > +
> > + /* proceed with bist and wait for 2 seconds */
> > + iowrite32(DOORBELL_IOA_START_BIST,
> > + pinstance->int_regs.host_ioa_interrupt_reg);
> > + doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
> > + intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
> > + pmcraid_info("doorbells after start bist: %x intrs: %x \n",
> > + doorbells, intrs);
> > +
> > + cmd->u.time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
> > + cmd->timer.data = (unsigned long)cmd;
> > + cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
> > + cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
> > + add_timer(&cmd->timer);
> > +}
> > +
> > +/**
> > + * pmcraid_reset_alert_done - completion routine for reset_alert
> > + * @cmd: pointer to command block used in reset sequence
> > + * Return value
> > + * None
> > + */
> > +static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + u32 status = ioread32(pinstance->ioa_status);
> > + unsigned long lock_flags;
> > +
> > + /* if the critical operation in progress bit is set or the wait times
> > + * out, invoke reset engine to proceed with hard reset. If there is
> > + * some more time to wait, restart the timer
> > + */
> > + if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
> > + cmd->u.time_left <= 0) {
> > + pmcraid_info("critical op is reset proceeding with reset\n");
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > + pmcraid_ioa_reset(cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > + } else {
> > + pmcraid_info("critical op is not yet reset waiting again\n");
> > + /* restart timer if some more time is available to wait */
> > + cmd->u.time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
> > + cmd->timer.data = (unsigned long)cmd;
> > + cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
> > + cmd->timer.function =
> > + (void (*)(unsigned long))pmcraid_reset_alert_done;
> > + add_timer(&cmd->timer);
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_reset_alert - alerts IOA for a possible reset
> > + * @cmd : command block to be used for reset sequence.
> > + *
> > + * Return Value
> > + * returns 0 if pci config-space is accessible and RESET_DOORBELL is
> > + * successfully written to IOA. Returns non-zero in case pci_config_space
> > + * is not accessible
> > + */
> > +static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + u32 doorbells;
> > + int rc;
> > + u16 pci_reg;
> > +
> > + /* If we are able to access IOA PCI config space, alert IOA that we are
> > + * going to reset it soon. This enables IOA to preserv persistent error
> > + * data if any. In case memory space is not accessible, proceed with
> > + * BIST or slot_reset
> > + */
> > + rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
> > + if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
> > +
> > + /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
> > + * reset IOA doesn't generate any interrupts when CRITICAL
> > + * OPERATION bit is reset. A timer is started to wait for this
> > + * bit to be reset.
> > + */
> > + cmd->u.time_left = PMCRAID_RESET_TIMEOUT;
> > + cmd->timer.data = (unsigned long)cmd;
> > + cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
> > + cmd->timer.function =
> > + (void (*)(unsigned long))pmcraid_reset_alert_done;
> > + add_timer(&cmd->timer);
> > +
> > + iowrite32(DOORBELL_IOA_RESET_ALERT,
> > + pinstance->int_regs.host_ioa_interrupt_reg);
> > + doorbells =
> > + ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
> > + pmcraid_info("doorbells after reset alert: %x\n", doorbells);
> > + } else {
> > + pmcraid_info("PCI config is not accessible starting BIST\n");
> > + pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
> > + pmcraid_start_bist(cmd);
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_timeout_handler - Timeout handler for internally generated ops
> > + *
> > + * @cmd : pointer to command structure, that got timedout
> > + *
> > + * This function blocks host requests and initiates an adapter reset.
> > + *
> > + * Return value:
> > + * None
> > + */
> > +static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + unsigned long lock_flags;
> > +
> > + dev_err(&pinstance->pdev->dev,
> > + "Adapter being reset due to command timeout.\n");
> > +
> > + /* Command timeouts result in hard reset sequence. The command that got
> > + * timed out may be the one used as part of reset sequence. In this
> > + * case restart reset sequence using the same command block even if
> > + * reset is in progress. Otherwise fail this command and get a free
> > + * command block to restart the reset sequence.
> > + */
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > + if (!pinstance->ioa_reset_in_progress) {
> > + pinstance->ioa_reset_attempts = 0;
> > + cmd = pmcraid_get_free_cmd(pinstance);
> > +
> > + /* If we are out of command blocks, just return here itself.
> > + * Some other command's timeout handler can do the reset job
> > + */
> > + if (cmd == NULL) {
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + lock_flags);
> > + pmcraid_err("no free cmnd block for timeout handler\n");
> > + return;
> > + }
> > +
> > + pinstance->reset_cmd = cmd;
> > + pinstance->ioa_reset_in_progress = 1;
> > + } else {
> > + pmcraid_info("reset is already in progress\n");
> > +
> > + if (pinstance->reset_cmd != cmd) {
> > + /* This command should have been given to IOA, this
> > + * command will be completed by fail_outstanding_cmds
> > + * anyway
> > + */
> > + pmcraid_err("cmd is pending but reset in progress\n");
> > + }
> > +
> > + /* If this command was being used as part of the reset
> > + * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
> > + * causes fail_outstanding_commands not to return the command
> > + * block back to free pool
> > + */
> > + if (cmd == pinstance->reset_cmd)
> > + cmd->cmd_done = pmcraid_ioa_reset;
> > +
> > + }
> > +
> > + pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
> > + scsi_block_requests(pinstance->host);
> > + pmcraid_reset_alert(cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > +}
> > +
> > +/**
> > + * pmcraid_internal_done - completion routine for internally generated cmds
> > + *
> > + * @cmd: command that got response from IOA
> > + *
> > + * Return Value:
> > + * none
> > + */
> > +static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
> > +{
> > + pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
> > +
> > + /* Some of the internal commands are sent with callers blocking for the
> > + * response. Same will be indicated as part of cmd->completion_req
> > + * field. Response path needs to wake up any waiters waiting for cmd
> > + * completion if this flag is set.
> > + */
> > + if (cmd->completion_req) {
> > + cmd->completion_req = 0;
> > + complete(&cmd->wait_for_completion);
> > + }
> > +
> > + /* most of the internal commands are completed by caller itself, so
> > + * no need to return the command block back to free pool until we are
> > + * required to do so (e.g once done with initialization).
> > + */
> > + if (cmd->release) {
> > + cmd->release = 0;
> > + pmcraid_return_cmd(cmd);
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
> > + *
> > + * @cmd: command that got response from IOA
> > + *
> > + * This routine is called after driver re-reads configuration table due to a
> > + * lost CCN. It returns the command block back to free pool and schedules
> > + * worker thread to add/delete devices into the system.
> > + *
> > + * Return Value:
> > + * none
> > + */
> > +static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
> > +{
> > + pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
> > +
> > + if (cmd->release) {
> > + cmd->release = 0;
> > + pmcraid_return_cmd(cmd);
> > + }
> > + pmcraid_info("scheduling worker for config table reinitialization\n");
> > + schedule_work(&cmd->drv_inst->worker_q);
> > +}
> > +
> > +/**
> > + * pmcraid_erp_done - Process completion of SCSI error response from device
> > + * @cmd: pmcraid_command
> > + *
> > + * This function copies the sense buffer into the scsi_cmd struct and completes
> > + * scsi_cmd by calling scsi_done function.
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
> > +{
> > + struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
> > +
> > + if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
> > + scsi_cmd->result |= (DID_ERROR << 16);
> > + pmcraid_err("command CDB[0] = %x failed with IOASC: 0x%08X\n",
> > + cmd->ioa_cb->ioarcb.cdb[0], ioasc);
> > + }
> > +
> > + /* if we had allocated sense buffers for request sense, copy the sense
> > + * release the buffers
> > + */
> > + if (cmd->sense_buffer != NULL) {
> > + memcpy(scsi_cmd->sense_buffer,
> > + cmd->sense_buffer,
> > + SCSI_SENSE_BUFFERSIZE);
> > + pci_free_consistent(pinstance->pdev,
> > + SCSI_SENSE_BUFFERSIZE,
> > + cmd->sense_buffer, cmd->sense_buffer_dma);
> > + cmd->sense_buffer = NULL;
> > + cmd->sense_buffer_dma = 0;
> > + }
> > +
> > + scsi_dma_unmap(scsi_cmd);
> > + pmcraid_return_cmd(cmd);
> > + scsi_cmd->scsi_done(scsi_cmd);
> > +}
> > +
> > +/**
> > + * pmcraid_fire_command - sends an IOA command to adapter
> > + *
> > + * This function adds the given block into pending command list
> > + * and returns without waiting
> > + *
> > + * @cmd : command to be sent to the device
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + unsigned long lock_flags;
> > +
> > + /* Add this command block to pending cmd pool. We do this prior to
> > + * writting IOARCB to ioarrin because IOA might complete the command
> > + * by the time we are about to add it to the list. Response handler
> > + * (isr/tasklet) looks for cmb block in the pending pending list.
> > + */
> > + spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
> > + list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
> > + spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
> > + atomic_inc(&pinstance->outstanding_cmds);
> > +
> > + /* driver writes lower 32-bit value of IOARCB address only */
> > + mb();
> > + iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
> > + pinstance->ioarrin);
> > +}
> > +
> > +/**
> > + * pmcraid_send_cmd - fires a command to IOA
> > + *
> > + * This function also sets up timeout function, and command completion
> > + * function
> > + *
> > + * @cmd: pointer to the command block to be fired to IOA
> > + * @cmd_done: command completion function, called once IOA responds
> > + * @timeout: timeout to wait for this command completion
> > + * @timeout_func: timeout handler
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_send_cmd(
> > + struct pmcraid_cmd *cmd,
> > + void (*cmd_done) (struct pmcraid_cmd *),
> > + unsigned long timeout,
> > + void (*timeout_func) (struct pmcraid_cmd *)
> > +)
> > +{
> > + /* initialize done function */
> > + cmd->cmd_done = cmd_done;
> > +
> > + if (timeout_func) {
> > + /* setup timeout handler */
> > + cmd->timer.data = (unsigned long)cmd;
> > + cmd->timer.expires = jiffies + timeout;
> > + cmd->timer.function = (void (*)(unsigned long))timeout_func;
> > + add_timer(&cmd->timer);
> > + }
> > +
> > + /* fire the command to IOA */
> > + _pmcraid_fire_command(cmd);
> > +}
> > +
> > +/**
> > + * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
> > + *
> > + * @cmd: pointer to the command block used as part of reset sequence
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
> > +{
> > + pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
> > +
> > + /* Note that commands sent during reset require next command to be sent
> > + * to IOA. Hence reinit the done function as well as timeout function
> > + */
> > + pmcraid_reinit_cmdblk(cmd);
> > + cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
> > + cmd->ioa_cb->ioarcb.resource_handle =
> > + cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
> > + cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
> > + cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
> > +
> > + /* fire shutdown command to hardware. */
> > + pmcraid_info("firing normal shutdown command (%d) to IOA\n",
> > + le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
> > +
> > + pmcraid_send_cmd(cmd, pmcraid_ioa_reset,
> > + PMCRAID_SHUTDOWN_TIMEOUT,
> > + pmcraid_timeout_handler);
> > +}
> > +
> > +/**
> > + * pmcraid_identify_hrrq - registers host rrq buffers with IOA
> > + * @cmd: pointer to command block to be used for identify hrrq
> > + *
> > + * Return Value
> > + * 0 in case of success, otherwise non-zero failure code
> > + */
> > +
> > +static void pmcraid_querycfg(struct pmcraid_cmd *);
> > +
> > +static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
> > + int index = 0;
> > + __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
> > + u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
> > +
> > + pmcraid_reinit_cmdblk(cmd);
> > +
> > + /* Initialize ioarcb */
> > + ioarcb->request_type = REQ_TYPE_IOACMD;
> > + ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
> > +
> > + /* initialize the hrrq number where IOA will respond to this command */
> > + ioarcb->hrrq_id = index;
> > + ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
> > + ioarcb->cdb[1] = index;
> > +
> > + /* IOA expects 64-bit pci address to be written in B.E format
> > + * (i.e cdb[2]=MSByte..cdb[9]=LSB.
> > + */
> > + pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb => %llx:%llx\n",
> > + hrrq_addr, ioarcb->ioarcb_bus_addr);
> > +
> > + memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
> > + memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
> > +
> > + /* Subsequent commands require HRRQ identification to be successful.
> > + * Note that this gets called even during reset from SCSI mid-layer
> > + * or tasklet
> > + */
> > + pmcraid_send_cmd(cmd, pmcraid_querycfg,
> > + PMCRAID_INTERNAL_TIMEOUT,
> > + pmcraid_timeout_handler);
> > +}
> > +
> > +static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
> > +static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
> > +
> > +/**
> > + * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
> > + *
> > + * @cmd: initialized command block pointer
> > + *
> > + * Return Value
> > + * none
> > + */
> > +static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
> > +{
> > + if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
> > + atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
> > + else
> > + atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
> > +
> > + pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
> > +}
> > +
> > +/**
> > + * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + * @type: HCAM type
> > + *
> > + * Return Value
> > + * pointer to initialized pmcraid_cmd structure or NULL
> > + */
> > +static struct pmcraid_cmd *pmcraid_init_hcam
> > +(
> > + struct pmcraid_instance *pinstance,
> > + u8 type
> > +)
> > +{
> > + struct pmcraid_cmd *cmd;
> > + struct pmcraid_ioarcb *ioarcb;
> > + struct pmcraid_ioadl_desc *ioadl;
> > + struct pmcraid_hostrcb *hcam;
> > + void (*cmd_done) (struct pmcraid_cmd *);
> > + dma_addr_t dma;
> > + int rcb_size;
> > +
> > + cmd = pmcraid_get_free_cmd(pinstance);
> > +
> > + if (!cmd) {
> > + pmcraid_err("no free command blocks for hcam\n");
> > + return cmd;
> > + }
> > +
> > + if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
> > + rcb_size = sizeof(struct pmcraid_hcam_ccn);
> > + cmd_done = pmcraid_process_ccn;
> > + dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
> > + hcam = &pinstance->ccn;
> > + } else {
> > + rcb_size = sizeof(struct pmcraid_hcam_ldn);
> > + cmd_done = pmcraid_process_ldn;
> > + dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
> > + hcam = &pinstance->ldn;
> > + }
> > +
> > + /* initialize command pointer used for HCAM registration */
> > + hcam->cmd = cmd;
> > +
> > + ioarcb = &cmd->ioa_cb->ioarcb;
> > + ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
> > + offsetof(struct pmcraid_ioarcb,
> > + add_data.u.ioadl[0]));
> > + ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
> > + ioadl = ioarcb->add_data.u.ioadl;
> > +
> > + /* Initialize ioarcb */
> > + ioarcb->request_type = REQ_TYPE_HCAM;
> > + ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
> > + ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
> > + ioarcb->cdb[1] = type;
> > + ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
> > + ioarcb->cdb[8] = (rcb_size) & 0xFF;
> > +
> > + ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
> > +
> > + ioadl[0].flags |= cpu_to_le32(IOADL_FLAGS_READ_LAST);
> > + ioadl[0].data_len = cpu_to_le32(rcb_size);
> > + ioadl[0].address = cpu_to_le32(dma);
> > +
> > + cmd->cmd_done = cmd_done;
> > + return cmd;
> > +}
> > +
> > +/**
> > + * pmcraid_send_hcam - Send an HCAM to IOA
> > + * @pinstance: ioa config struct
> > + * @type: HCAM type
> > + *
> > + * This function will send a Host Controlled Async command to IOA.
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
> > +{
> > + struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
> > + pmcraid_send_hcam_cmd(cmd);
> > +}
> > +
> > +
> > +/**
> > + * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
> > + *
> > + * @cmd: pointer to cmd that is used as cancelling command
> > + * @cmd_to_cancel: pointer to the command that needs to be cancelled
> > + */
> > +static void pmcraid_prepare_cancel_cmd(
> > + struct pmcraid_cmd *cmd,
> > + struct pmcraid_cmd *cmd_to_cancel
> > +)
> > +{
> > + struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
> > + __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
> > +
> > + /* Get the resource handle to where the command to be aborted has been
> > + * sent.
> > + */
> > + ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
> > + ioarcb->request_type = REQ_TYPE_IOACMD;
> > + memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
> > + ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
> > +
> > + /* IOARCB address of the command to be cancelled is given in
> > + * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
> > + * IOARCB address are not masked.
> > + */
> > + ioarcb_addr = cpu_to_be64(ioarcb_addr);
> > + memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
> > +}
> > +
> > +/**
> > + * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
> > + *
> > + * @cmd: command to be used as cancelling command
> > + * @type: HCAM type
> > + * @cmd_done: op done function for the cancelling command
> > + */
> > +static void pmcraid_cancel_hcam(
> > + struct pmcraid_cmd *cmd,
> > + u8 type,
> > + void (*cmd_done) (struct pmcraid_cmd *)
> > +)
> > +{
> > + struct pmcraid_instance *pinstance;
> > + struct pmcraid_hostrcb *hcam;
> > +
> > + pinstance = cmd->drv_inst;
> > + hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
> > + &pinstance->ldn : &pinstance->ccn;
> > +
> > + /* prepare for cancelling previous hcam command. If the HCAM is
> > + * currently not pending with IOA, we would have hcam->cmd as non-null
> > + */
> > + if (hcam->cmd == NULL)
> > + return;
> > +
> > + pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
> > +
> > + /* writing to IOARRIN must be protected by host_lock, as mid-layer
> > + * schedule queuecommand while we are doing this
> > + */
> > + pmcraid_send_cmd(cmd, cmd_done,
> > + PMCRAID_INTERNAL_TIMEOUT,
> > + pmcraid_timeout_handler);
> > +}
> > +
> > +/**
> > + * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
> > + *
> > + * @cmd: command block to be used for cancelling the HCAM
> > + */
> > +static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
> > +{
> > + pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
> > +
> > + pmcraid_reinit_cmdblk(cmd);
> > +
> > + pmcraid_cancel_hcam(cmd,
> > + PMCRAID_HCAM_CODE_CONFIG_CHANGE,
> > + pmcraid_ioa_shutdown);
> > +}
> > +
> > +/**
> > + * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
> > + *
> > + * @cmd: command block to be used for cancelling the HCAM
> > + */
> > +static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
> > +{
> > + pmcraid_cancel_hcam(cmd,
> > + PMCRAID_HCAM_CODE_LOG_DATA,
> > + pmcraid_cancel_ccn);
> > +}
> > +
> > +/**
> > + * pmcraid_expose_resource - check if the resource can be exposed to OS
> > + *
> > + * @cfgte: pointer to configuration table entry of the resource
> > + *
> > + * Return value:
> > + * true if resource can be added to midlayer, false(0) otherwise
> > + */
> > +static int pmcraid_expose_resource(struct pmcraid_config_table_entry *cfgte)
> > +{
> > + int retval = 0;
> > +
> > + if (cfgte->resource_type == RES_TYPE_VSET)
> > + retval = ((cfgte->unique_flags1 & 0xFF) < 0xFE);
> > + else if (cfgte->resource_type == RES_TYPE_GSCSI)
> > + retval = (RES_BUS(cfgte->resource_address) !=
> > + PMCRAID_VIRTUAL_ENCL_BUS_ID);
> > + return retval;
> > +}
> > +
> > +/* attributes supported by pmcraid_event_family */
> > +enum {
> > + PMCRAID_AEN_ATTR_UNSPEC,
> > + PMCRAID_AEN_ATTR_EVENT,
> > + __PMCRAID_AEN_ATTR_MAX,
> > +};
> > +#define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
> > +
> > +/* commands supported by pmcraid_event_family */
> > +enum {
> > + PMCRAID_AEN_CMD_UNSPEC,
> > + PMCRAID_AEN_CMD_EVENT,
> > + __PMCRAID_AEN_CMD_MAX,
> > +};
> > +#define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
> > +
> > +static struct genl_family pmcraid_event_family = {
> > + .id = GENL_ID_GENERATE,
> > + .name = "pmcraid",
> > + .version = 1,
> > + .maxattr = PMCRAID_AEN_ATTR_MAX
> > +};
> > +
> > +/**
> > + * pmcraid_netlink_init - registers pmcraid_event_family
> > + *
> > + * Return value:
> > + * 0 if the pmcraid_event_family is successfully registered
> > + * with netlink generic, non-zero otherwise
> > + */
> > +static int pmcraid_netlink_init(void)
> > +{
> > + int result;
> > +
> > + result = genl_register_family(&pmcraid_event_family);
> > +
> > + if (result)
> > + return result;
> > +
> > + pmcraid_info("registered NETLINK GENERIC group: %d\n",
> > + pmcraid_event_family.id);
> > +
> > + return result;
> > +}
> > +
> > +/**
> > + * pmcraid_netlink_release - unregisters pmcraid_event_family
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_netlink_release(void)
> > +{
> > + genl_unregister_family(&pmcraid_event_family);
> > +}
> > +
> > +/**
> > + * pmcraid_notify_aen - sends event msg to user space application
> > + * @pinstance: pointer to adapter instance structure
> > + * @type: HCAM type
> > + *
> > + * Return value:
> > + * 0 if success, error value in case of any failure.
> > + */
> > +static int pmcraid_notify_aen(struct pmcraid_instance *pinstance, u8 type)
> > +{
> > + struct sk_buff *skb;
> > + struct pmcraid_aen_msg *aen_msg;
> > + void *msg_header;
> > + int data_size, total_size;
> > + int result;
> > +
> > +
> > + if (type == PMCRAID_HCAM_CODE_LOG_DATA) {
> > + aen_msg = pinstance->ldn.msg;
> > + data_size = pinstance->ldn.hcam->data_len;
> > + } else {
> > + aen_msg = pinstance->ccn.msg;
> > + data_size = pinstance->ccn.hcam->data_len;
> > + }
> > +
> > + data_size += sizeof(struct pmcraid_hcam_hdr);
> > + aen_msg->hostno = (pinstance->host->unique_id << 16 |
> > + MINOR(pinstance->cdev.dev));
> > + aen_msg->length = data_size;
> > + data_size += sizeof(*aen_msg);
> > +
> > + total_size = nla_total_size(data_size);
> > + skb = genlmsg_new(total_size, GFP_ATOMIC);
> > +
> > +
> > + if (!skb) {
> > + pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
> > + total_size);
> > + return -ENOMEM;
> > + }
> > +
> > + /* add the genetlink message header */
> > + msg_header = genlmsg_put(skb, 0, 0,
> > + &pmcraid_event_family, 0,
> > + PMCRAID_AEN_CMD_EVENT);
> > + if (!msg_header) {
> > + pmcraid_err("failed to copy command details\n");
> > + nlmsg_free(skb);
> > + return -ENOMEM;
> > + }
> > +
> > + result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
> > +
> > + if (result) {
> > + pmcraid_err("failed to copy AEN attribute data \n");
> > + nlmsg_free(skb);
> > + return -EINVAL;
> > + }
> > +
> > + /* send genetlink multicast message to notify appplications */
> > + result = genlmsg_end(skb, msg_header);
> > +
> > + if (result < 0) {
> > + pmcraid_err("genlmsg_end failed\n");
> > + nlmsg_free(skb);
> > + return result;
> > + }
> > +
> > + result =
> > + genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
> > +
> > + /* If there are no listeners, genlmsg_multicast may return non-zero
> > + * value.
> > + */
> > + if (result)
> > + pmcraid_info("failed to send %s event message %x!\n",
> > + type == PMCRAID_HCAM_CODE_LOG_DATA ? "LDN" : "CCN",
> > + result);
> > + return result;
> > +}
> > +
> > +/**
> > + * pmcraid_handle_config_change - Handle a config change from the adapter
> > + * @pinstance: pointer to per adapter instance structure
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
> > +{
> > + struct pmcraid_config_table_entry *cfg_entry;
> > + struct pmcraid_hcam_ccn *ccn_hcam;
> > + struct pmcraid_cmd *cmd;
> > + struct pmcraid_cmd *cfgcmd;
> > + struct pmcraid_resource_entry *res = NULL;
> > + u32 new_entry = 1;
> > + unsigned long lock_flags;
> > + unsigned long host_lock_flags;
> > + int rc;
> > +
> > + ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
> > + cfg_entry = &ccn_hcam->cfg_entry;
> > +
> > + pmcraid_info
> > + ("CCN(%x): %x type: %x lost: %x flags: %x res: %x:%x:%x:%x\n",
> > + pinstance->ccn.hcam->ilid,
> > + pinstance->ccn.hcam->op_code,
> > + pinstance->ccn.hcam->notification_type,
> > + pinstance->ccn.hcam->notification_lost,
> > + pinstance->ccn.hcam->flags,
> > + pinstance->host->unique_id,
> > + RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
> > + (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
> > + RES_BUS(cfg_entry->resource_address)),
> > + RES_IS_VSET(*cfg_entry) ? cfg_entry->unique_flags1 :
> > + RES_TARGET(cfg_entry->resource_address),
> > + RES_LUN(cfg_entry->resource_address));
> > +
> > +
> > + /* If this HCAM indicates a lost notification, read the config table */
> > + if (pinstance->ccn.hcam->notification_lost) {
> > + cfgcmd = pmcraid_get_free_cmd(pinstance);
> > + if (cfgcmd) {
> > + pmcraid_info("lost CCN, reading config table\b");
> > + pinstance->reinit_cfg_table = 1;
> > + pmcraid_querycfg(cfgcmd);
> > + } else {
> > + pmcraid_err("lost CCN, no free cmd for querycfg\n");
> > + }
> > + goto out_notify_apps;
> > + }
> > +
> > + /* If this resource is not going to be added to mid-layer, just notify
> > + * applications and return
> > + */
> > + if (!pmcraid_expose_resource(cfg_entry))
> > + goto out_notify_apps;
> > +
> > + spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
> > + list_for_each_entry(res, &pinstance->used_res_q, queue) {
> > + rc = memcmp(&res->cfg_entry.resource_address,
> > + &cfg_entry->resource_address,
> > + sizeof(cfg_entry->resource_address));
> > + if (!rc) {
> > + new_entry = 0;
> > + break;
> > + }
> > + }
> > +
> > + if (new_entry) {
> > +
> > + /* If there are more number of resources than what driver can
> > + * manage, do not notify the applications about the CCN. Just
> > + * ignore this notifications and re-register the same HCAM
> > + */
> > + if (list_empty(&pinstance->free_res_q)) {
> > + spin_unlock_irqrestore(&pinstance->resource_lock,
> > + lock_flags);
> > + pmcraid_err("too many resources attached\n");
> > + spin_lock_irqsave(pinstance->host->host_lock,
> > + host_lock_flags);
> > + pmcraid_send_hcam(pinstance,
> > + PMCRAID_HCAM_CODE_CONFIG_CHANGE);
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + host_lock_flags);
> > + return;
> > + }
> > +
> > + res = list_entry(pinstance->free_res_q.next,
> > + struct pmcraid_resource_entry, queue);
> > +
> > + list_del(&res->queue);
> > + res->scsi_dev = NULL;
> > + res->reset_progress = 0;
> > + list_add_tail(&res->queue, &pinstance->used_res_q);
> > + }
> > +
> > + memcpy(&res->cfg_entry, cfg_entry,
> > + sizeof(struct pmcraid_config_table_entry));
> > +
> > + if (pinstance->ccn.hcam->notification_type ==
> > + NOTIFICATION_TYPE_ENTRY_DELETED) {
> > + if (res->scsi_dev) {
> > + res->change_detected = RES_CHANGE_DEL;
> > + res->cfg_entry.resource_handle =
> > + PMCRAID_INVALID_RES_HANDLE;
> > + schedule_work(&pinstance->worker_q);
> > + } else {
> > + /* This may be one of the non-exposed resources */
> > + list_move_tail(&res->queue, &pinstance->free_res_q);
> > + }
> > + } else if (!res->scsi_dev) {
> > + res->change_detected = RES_CHANGE_ADD;
> > + schedule_work(&pinstance->worker_q);
> > + }
> > + spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
> > +
> > +out_notify_apps:
> > +
> > + /* Notify configuration changes to registered applications.*/
> > + if (!pmcraid_disable_aen)
> > + pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
> > +
> > + cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
> > + if (cmd)
> > + pmcraid_send_hcam_cmd(cmd);
> > +}
> > +
> > +/**
> > + * pmcraid_get_error_info - return error string for an ioasc
> > + * @ioasc: ioasc code
> > + * Return Value
> > + * none
> > + */
> > +static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
> > +{
> > + int i;
> > + for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
> > + if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
> > + return &pmcraid_ioasc_error_table[i];
> > + }
> > + return NULL;
> > +}
> > +
> > +/**
> > + * pmcraid_ioasc_logger - log IOASC information based user-settings
> > + * @ioasc: ioasc code
> > + * @cmd: pointer to command that resulted in 'ioasc'
> > + */
> > +void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
> > +
> > + if (error_info == NULL ||
> > + cmd->drv_inst->current_log_level < error_info->log_level)
> > + return;
> > +
> > + /* log the error string */
> > + pmcraid_err("cmd [%d] for resource %x failed with %x(%s)\n",
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + cmd->ioa_cb->ioarcb.resource_handle,
> > + le32_to_cpu(ioasc), error_info->error_string);
> > +}
> > +
> > +/**
> > + * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
> > + *
> > + * @pinstance: pointer to per adapter instance structure
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
> > +{
> > + struct pmcraid_hcam_ldn *hcam_ldn;
> > + u32 ioasc;
> > +
> > + hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
> > +
> > + pmcraid_info
> > + ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
> > + pinstance->ldn.hcam->ilid,
> > + pinstance->ldn.hcam->op_code,
> > + pinstance->ldn.hcam->notification_type,
> > + pinstance->ldn.hcam->notification_lost,
> > + pinstance->ldn.hcam->flags,
> > + pinstance->ldn.hcam->overlay_id);
> > +
> > + /* log only the errors, no need to log informational log entries */
> > + if (pinstance->ldn.hcam->notification_type !=
> > + NOTIFICATION_TYPE_ERROR_LOG)
> > + return;
> > +
> > + if (pinstance->ldn.hcam->notification_lost ==
> > + HOSTRCB_NOTIFICATIONS_LOST)
> > + dev_err(&pinstance->pdev->dev, "Error notifications lost\n");
> > +
> > + ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
> > +
> > + if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
> > + ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
> > + dev_err(&pinstance->pdev->dev,
> > + "UnitAttention due to IOA Bus Reset\n");
> > + scsi_report_bus_reset(
> > + pinstance->host,
> > + RES_BUS(hcam_ldn->error_log.fd_ra));
> > + }
> > +
> > + return;
> > +}
> > +
> > +/**
> > + * pmcraid_process_ccn - Op done function for a CCN.
> > + * @cmd: pointer to command struct
> > + *
> > + * This function is the op done function for a configuration
> > + * change notification
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
> > + unsigned long lock_flags;
> > +
> > + pinstance->ccn.cmd = NULL;
> > + pmcraid_return_cmd(cmd);
> > +
> > + /* If driver initiated IOA reset happened while this hcam was pending
> > + * with IOA, or IOA bringdown sequence is in progress, no need to
> > + * re-register the hcam
> > + */
> > + if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
> > + atomic_read(&pinstance->ccn.ignore) == 1) {
> > + return;
> > + } else if (ioasc) {
> > + dev_err(&pinstance->pdev->dev,
> > + "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > + pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > + } else {
> > + pmcraid_handle_config_change(pinstance);
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_process_ldn - op done function for an LDN
> > + * @cmd: pointer to command block
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_initiate_reset(struct pmcraid_instance *);
> > +
> > +static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + struct pmcraid_hcam_ldn *ldn_hcam =
> > + (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
> > + u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
> > + u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
> > + unsigned long lock_flags;
> > +
> > + /* return the command block back to freepool */
> > + pinstance->ldn.cmd = NULL;
> > + pmcraid_return_cmd(cmd);
> > +
> > + /* If driver initiated IOA reset happened while this hcam was pending
> > + * with IOA, no need to re-register the hcam as reset engine will do it
> > + * once reset sequence is complete
> > + */
> > + if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
> > + atomic_read(&pinstance->ccn.ignore) == 1) {
> > + return;
> > + } else if (!ioasc) {
> > + pmcraid_handle_error_log(pinstance);
> > + if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
> > + spin_lock_irqsave(pinstance->host->host_lock,
> > + lock_flags);
> > + pmcraid_initiate_reset(pinstance);
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + lock_flags);
> > + return;
> > + }
> > + } else {
> > + dev_err(&pinstance->pdev->dev,
> > + "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
> > + }
> > + /* send netlink message for HCAM notification if enabled */
> > + if (!pmcraid_disable_aen)
> > + pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
> > +
> > + cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
> > + if (cmd)
> > + pmcraid_send_hcam_cmd(cmd);
> > +}
> > +
> > +/**
> > + * pmcraid_register_hcams - register HCAMs for CCN and LDN
> > + *
> > + * @pinstance: pointer per adapter instance structure
> > + *
> > + * Return Value
> > + * none
> > + */
> > +static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
> > +{
> > + pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
> > + pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
> > +}
> > +
> > +/**
> > + * pmcraid_unregister_hcams - cancel HCAMs registered already
> > + * @cmd: pointer to command used as part of reset sequence
> > + */
> > +static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > +
> > + /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
> > + * handling hcam response though it is not necessary. In order to
> > + * prevent this, set 'ignore', so that bring-down sequence doesn't
> > + * re-send any more hcams
> > + */
> > + atomic_set(&pinstance->ccn.ignore, 1);
> > + atomic_set(&pinstance->ldn.ignore, 1);
> > +
> > + /* If adapter reset was forced as part of runtime reset sequence,
> > + * start the reset sequence.
> > + */
> > + if (pinstance->force_ioa_reset && !pinstance->ioa_bringdown) {
> > + pinstance->force_ioa_reset = 0;
> > + pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
> > + pmcraid_reset_alert(cmd);
> > + return;
> > + }
> > +
> > + /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
> > + * one after the other. So CCN cancellation will be triggered by
> > + * pmcraid_cancel_ldn itself.
> > + */
> > + pmcraid_cancel_ldn(cmd);
> > +}
> > +
> > +/**
> > + * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
> > + * @pinstance: pointer to adapter instance structure
> > + * Return Value
> > + * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
> > + */
> > +static void pmcraid_reinit_buffers(struct pmcraid_instance *);
> > +
> > +static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
> > +{
> > + u32 intrs;
> > +
> > + pmcraid_reinit_buffers(pinstance);
> > + intrs = pmcraid_read_interrupts(pinstance);
> > +
> > + pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
> > +
> > + if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
> > + iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
> > + pinstance->int_regs.ioa_host_interrupt_mask_reg);
> > + iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
> > + pinstance->int_regs.ioa_host_interrupt_clr_reg);
> > + return 1;
> > + } else {
> > + return 0;
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
> > + * @cmd : pointer to reset command block
> > + *
> > + * Return Value
> > + * none
> > + */
> > +static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + u32 int_reg;
> > + u32 doorbell;
> > +
> > + /* There will be an interrupt when Transition to Operational bit is
> > + * set so tasklet would execute next reset task. The timeout handler
> > + * would re-initiate a reset
> > + */
> > + cmd->cmd_done = pmcraid_ioa_reset;
> > + cmd->timer.data = (unsigned long)cmd;
> > + cmd->timer.expires = jiffies +
> > + msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
> > + cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
> > +
> > + if (!timer_pending(&cmd->timer))
> > + add_timer(&cmd->timer);
> > +
> > + /* Enable destructive diagnostics on IOA if it is not yet in
> > + * operational state
> > + */
> > + doorbell = DOORBELL_RUNTIME_RESET |
> > + DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
> > +
> > + iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
> > + int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
> > + pmcraid_info("Waiting for IOA to become operational %x:%x\n",
> > + ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
> > + int_reg);
> > +}
> > +
> > +/**
> > + * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * Return Value
> > + * none
> > + */
> > +static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
> > +{
> > + pmcraid_info("%s is not yet implemented\n", __func__);
> > +}
> > +
> > +/**
> > + * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * This function fails all outstanding ops. If they are submitted to IOA
> > + * already, it sends cancel all messages if IOA is still accepting IOARCBs,
> > + * otherwise just completes the commands and returns the cmd blocks to free
> > + * pool.
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
> > +{
> > + struct pmcraid_cmd *cmd, *temp;
> > + unsigned long lock_flags;
> > +
> > + /* pending command list is protected by pending_pool_lock. Its
> > + * traversal must be done as within this lock
> > + */
> > + spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
> > + list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
> > + free_list) {
> > + list_del(&cmd->free_list);
> > + spin_unlock_irqrestore(&pinstance->pending_pool_lock,
> > + lock_flags);
> > + cmd->ioa_cb->ioasa.ioasc =
> > + cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
> > + cmd->ioa_cb->ioasa.ilid =
> > + cpu_to_be32(PMCRAID_DRIVER_ILID);
> > +
> > + /* In case the command timer is still running */
> > + del_timer(&cmd->timer);
> > +
> > + /* If this is an IO command, complete it by invoking scsi_done
> > + * function. If this is one of the internal commands other
> > + * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
> > + * complete it
> > + */
> > + if (cmd->scsi_cmd) {
> > +
> > + struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
> > + __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
> > +
> > + scsi_cmd->result |= DID_ERROR << 16;
> > +
> > + scsi_dma_unmap(scsi_cmd);
> > + pmcraid_return_cmd(cmd);
> > +
> > +
> > + pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
> > + le32_to_cpu(resp) >> 2,
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + scsi_cmd->result);
> > + scsi_cmd->scsi_done(scsi_cmd);
> > + } else if (cmd->cmd_done == pmcraid_internal_done ||
> > + cmd->cmd_done == pmcraid_erp_done) {
> > + cmd->cmd_done(cmd);
> > + } else if (cmd->cmd_done != pmcraid_ioa_reset) {
> > + pmcraid_return_cmd(cmd);
> > + }
> > +
> > + atomic_dec(&pinstance->outstanding_cmds);
> > + spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
> > + }
> > +
> > + spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
> > +}
> > +
> > +/**
> > + * pmcraid_ioa_reset - Implementation of IOA reset logic
> > + *
> > + * @cmd: pointer to the cmd block to be used for entire reset process
> > + *
> > + * This function executes most of the steps required for IOA reset. This gets
> > + * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
> > + * 'eh_' thread. Access to variables used for controling the reset sequence is
> > + * synchronized using host lock. Various functions called during reset process
> > + * would make use of a single command block, pointer to which is also stored in
> > + * adapter instance structure.
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + u8 reset_complete = 0;
> > +
> > + pinstance->ioa_reset_in_progress = 1;
> > +
> > + if (pinstance->reset_cmd != cmd) {
> > + pmcraid_err("reset is called with different command block\n");
> > + pinstance->reset_cmd = cmd;
> > + }
> > +
> > + pmcraid_info("reset_engine: state = %d, command = %p\n",
> > + pinstance->ioa_state, cmd);
> > +
> > + switch (pinstance->ioa_state) {
> > +
> > + case IOA_STATE_DEAD:
> > + /* If IOA is offline, whatever may be the reset reason, just
> > + * return. callers might be waiting on the reset wait_q, wake
> > + * up them
> > + */
> > + pmcraid_err("IOA is offline no reset is possible\n");
> > + reset_complete = 1;
> > + break;
> > +
> > + case IOA_STATE_IN_BRINGDOWN:
> > + /* we enter here, once ioa shutdown command is processed by IOA
> > + * Alert IOA for a possible reset. If reset alert fails, IOA
> > + * goes through hard-reset
> > + */
> > + pmcraid_disable_interrupts(pinstance, ~0);
> > + pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
> > + pmcraid_reset_alert(cmd);
> > + break;
> > +
> > + case IOA_STATE_UNKNOWN:
> > + /* We may be called during probe or resume. Some pre-processing
> > + * is required for prior to reset
> > + */
> > + scsi_block_requests(pinstance->host);
> > +
> > + /* If asked to reset while IOA was processing responses or
> > + * there are any error responses then IOA may require
> > + * hard-reset.
> > + */
> > + if (pinstance->ioa_hard_reset == 0) {
> > + if (ioread32(pinstance->ioa_status) &
> > + INTRS_TRANSITION_TO_OPERATIONAL) {
> > + pmcraid_info("sticky bit set, bring-up\n");
> > + pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
> > + pmcraid_reinit_cmdblk(cmd);
> > + pmcraid_identify_hrrq(cmd);
> > + } else {
> > + pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
> > + pmcraid_soft_reset(cmd);
> > + }
> > + } else {
> > + /* Alert IOA of a possible reset and wait for critical
> > + * operation in progress bit to reset
> > + */
> > + pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
> > + pmcraid_reset_alert(cmd);
> > + }
> > + break;
> > +
> > + case IOA_STATE_IN_RESET_ALERT:
> > + /* If critical operation in progress bit is reset or wait gets
> > + * timed out, reset proceeds with starting BIST on the IOA.
> > + * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
> > + * they are 3 or more, reset engine marks IOA dead and returns
> > + */
> > + pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
> > + pmcraid_start_bist(cmd);
> > + break;
> > +
> > + case IOA_STATE_IN_HARD_RESET:
> > + pinstance->ioa_reset_attempts++;
> > +
> > + /* retry reset if we haven't reached maximum allowed limit */
> > + if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
> > + pinstance->ioa_reset_attempts = 0;
> > + pmcraid_err("IOA didn't respond marking it as dead\n");
> > + pinstance->ioa_state = IOA_STATE_DEAD;
> > + reset_complete = 1;
> > + break;
> > + }
> > +
> > + /* Once either bist or pci reset is done, restore PCI config
> > + * space. If this fails, proceed with hard reset again
> > + */
> > +
> > + if (pci_restore_state(pinstance->pdev)) {
> > + pmcraid_info("config-space error resetting again\n");
> > + pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
> > + pmcraid_reset_alert(cmd);
> > + break;
> > + }
> > +
> > + /* fail all pending commands */
> > + pmcraid_fail_outstanding_cmds(pinstance);
> > +
> > + /* check if unit check is active, if so extract dump */
> > + if (pinstance->ioa_unit_check) {
> > + pmcraid_info("unit check is active\n");
> > + pinstance->ioa_unit_check = 0;
> > + pmcraid_get_dump(pinstance);
> > + pinstance->ioa_reset_attempts--;
> > + pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
> > + pmcraid_reset_alert(cmd);
> > + break;
> > + }
> > +
> > + /* if the reset reason is to bring-down the ioa, we might be
> > + * done with the reset restore pci_config_space and complete
> > + * the reset
> > + */
> > + if (pinstance->ioa_bringdown) {
> > + pmcraid_info("bringing down the adapter\n");
> > + pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
> > + pinstance->ioa_bringdown = 0;
> > + pinstance->ioa_state = IOA_STATE_UNKNOWN;
> > + reset_complete = 1;
> > + } else {
> > + /* bring-up IOA, so proceed with soft reset
> > + * Reinitialize hrrq_buffers and their indices also
> > + * enable interrupts after a pci_restore_state
> > + */
> > + if (pmcraid_reset_enable_ioa(pinstance)) {
> > + pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
> > + pmcraid_info("bringing up the adapter\n");
> > + pmcraid_reinit_cmdblk(cmd);
> > + pmcraid_identify_hrrq(cmd);
> > + } else {
> > + pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
> > + pmcraid_soft_reset(cmd);
> > + }
> > + }
> > + break;
> > +
> > + case IOA_STATE_IN_SOFT_RESET:
> > + /* TRANSITION TO OPERATIONAL is on so start initialization
> > + * sequence
> > + */
> > + pmcraid_info("In softreset proceeding with bring-up\n");
> > + pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
> > +
> > + /* Initialization commands start with HRRQ identification. From
> > + * now on tasklet completes most of the commands as IOA is up
> > + * and intrs are enabled
> > + */
> > + pmcraid_identify_hrrq(cmd);
> > + break;
> > +
> > + case IOA_STATE_IN_BRINGUP:
> > + /* we are done with bringing up of IOA, change the ioa_state to
> > + * operational and wake up any waiters
> > + */
> > + pinstance->ioa_state = IOA_STATE_OPERATIONAL;
> > + reset_complete = 1;
> > + break;
> > +
> > + case IOA_STATE_OPERATIONAL:
> > + default:
> > + /* When IOA is operational and a reset is requested, check for
> > + * the reset reason. If reset is to bring down IOA, unregister
> > + * HCAMs and initiate shutdown; if adapter reset is forced then
> > + * restart reset sequence again
> > + */
> > + if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
> > + pinstance->force_ioa_reset == 0) {
> > + reset_complete = 1;
> > + } else {
> > + if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
> > + pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
> > + pmcraid_reinit_cmdblk(cmd);
> > + pmcraid_unregister_hcams(cmd);
> > + }
> > + break;
> > + }
> > +
> > + /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
> > + * OPERATIONAL. Reset all control variables used during reset, wake up
> > + * any waiting threads and let the SCSI mid-layer send commands. Note
> > + * that host_lock must be held before invoking scsi_report_bus_reset.
> > + */
> > + if (reset_complete) {
> > + pinstance->ioa_reset_in_progress = 0;
> > + pinstance->ioa_reset_attempts = 0;
> > + pinstance->reset_cmd = NULL;
> > + pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
> > + pinstance->ioa_bringdown = 0;
> > + pmcraid_return_cmd(cmd);
> > +
> > + /* If target state is to bring up the adapter, proceed with
> > + * hcam registration and resource exposure to mid-layer.
> > + */
> > + if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
> > + pmcraid_register_hcams(pinstance);
> > +
> > + wake_up_all(&pinstance->reset_wait_q);
> > + }
> > +
> > + return;
> > +}
> > +
> > +/**
> > + * pmcraid_initiate_reset - initiates reset sequence. This is called from
> > + * ISR/tasklet during error interrupts including IOA unit check. If reset
> > + * is already in progress, it just returns, otherwise initiates IOA reset
> > + * to bring IOA up to operational state.
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
> > +{
> > + struct pmcraid_cmd *cmd;
> > +
> > + /* If the reset is already in progress, just return, otherwise start
> > + * reset sequence and return
> > + */
> > + if (!pinstance->ioa_reset_in_progress) {
> > + scsi_block_requests(pinstance->host);
> > + cmd = pmcraid_get_free_cmd(pinstance);
> > +
> > + if (cmd == NULL) {
> > + pmcraid_err("no cmnd blocks for initiate_reset\n");
> > + return;
> > + }
> > +
> > + pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
> > + pinstance->reset_cmd = cmd;
> > + pinstance->force_ioa_reset = 1;
> > + pmcraid_ioa_reset(cmd);
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
> > + * or bringdown IOA
> > + * @pinstance: pointer adapter instance structure
> > + * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
> > + * @target_state: expected target state after reset
> > + *
> > + * Note: This command initiates reset and waits for its completion. Hence this
> > + * should not be called from isr/timer/tasklet functions (timeout handlers,
> > + * error response handlers and interrupt handlers).
> > + *
> > + * Return Value
> > + * 1 in case ioa_state is not target_state, 0 otherwise.
> > + */
> > +static int pmcraid_reset_reload(
> > + struct pmcraid_instance *pinstance,
> > + u8 shutdown_type,
> > + u8 target_state
> > +)
> > +{
> > + struct pmcraid_cmd *reset_cmd = NULL;
> > + unsigned long lock_flags;
> > + int reset = 1;
> > +
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > +
> > + if (pinstance->ioa_reset_in_progress) {
> > + pmcraid_info("reset_reload: reset is already in progress\n");
> > +
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > +
> > + wait_event(pinstance->reset_wait_q,
> > + !pinstance->ioa_reset_in_progress);
> > +
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > +
> > + if (pinstance->ioa_state == IOA_STATE_DEAD) {
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + lock_flags);
> > + pmcraid_info("reset_reload: IOA is dead\n");
> > + return reset;
> > + } else if (pinstance->ioa_state == target_state) {
> > + reset = 0;
> > + }
> > + }
> > +
> > + if (reset) {
> > + pmcraid_info("reset_reload: proceeding with reset\n");
> > + scsi_block_requests(pinstance->host);
> > + reset_cmd = pmcraid_get_free_cmd(pinstance);
> > +
> > + if (reset_cmd == NULL) {
> > + pmcraid_err("no free cmnd for reset_reload\n");
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + lock_flags);
> > + return reset;
> > + }
> > +
> > + if (shutdown_type == SHUTDOWN_NORMAL)
> > + pinstance->ioa_bringdown = 1;
> > +
> > + pinstance->ioa_shutdown_type = shutdown_type;
> > + pinstance->reset_cmd = reset_cmd;
> > + pinstance->force_ioa_reset = reset;
> > + pmcraid_info("reset_reload: initiating reset\n");
> > + pmcraid_ioa_reset(reset_cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > + pmcraid_info("reset_reload: waiting for reset to complete\n");
> > + wait_event(pinstance->reset_wait_q,
> > + !pinstance->ioa_reset_in_progress);
> > +
> > + pmcraid_info("reset_reload: reset is complete !! \n");
> > + scsi_unblock_requests(pinstance->host);
> > + if (pinstance->ioa_state == target_state)
> > + reset = 0;
> > + }
> > +
> > + return reset;
> > +}
> > +
> > +/**
> > + * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * Return Value
> > + * whatever is returned from pmcraid_reset_reload
> > + */
> > +static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
> > +{
> > + return pmcraid_reset_reload(pinstance,
> > + SHUTDOWN_NORMAL,
> > + IOA_STATE_UNKNOWN);
> > +}
> > +
> > +/**
> > + * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * Return Value
> > + * whatever is returned from pmcraid_reset_reload
> > + */
> > +static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
> > +{
> > + return pmcraid_reset_reload(pinstance,
> > + SHUTDOWN_NONE,
> > + IOA_STATE_OPERATIONAL);
> > +}
> > +
> > +/**
> > + * pmcraid_request_sense - Send request sense to a device
> > + * @cmd: pmcraid command struct
> > + *
> > + * This function sends a request sense to a device as a result of a check
> > + * condition. This method re-uses the same command block that failed earlier.
> > + */
> > +static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
> > + struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
> > +
> > + /* allocate DMAable memory for sense buffers */
> > + cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
> > + SCSI_SENSE_BUFFERSIZE,
> > + &cmd->sense_buffer_dma);
> > +
> > + if (cmd->sense_buffer == NULL) {
> > + pmcraid_err
> > + ("couldn't allocate sense buffer for request sense\n");
> > + pmcraid_erp_done(cmd);
> > + return;
> > + }
> > +
> > + /* re-use the command block */
> > + memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
> > + memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
> > + ioarcb->request_flags0 = (SYNC_COMPLETE |
> > + NO_LINK_DESCS |
> > + INHIBIT_UL_CHECK);
> > + ioarcb->request_type = REQ_TYPE_SCSI;
> > + ioarcb->cdb[0] = REQUEST_SENSE;
> > + ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
> > +
> > + ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
> > + offsetof(struct pmcraid_ioarcb,
> > + add_data.u.ioadl[0]));
> > + ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
> > +
> > + ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
> > +
> > + ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
> > + ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
> > + ioadl->flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC);
> > +
> > + /* request sense might be called as part of error response processing
> > + * which runs in tasklets context. It is possible that mid-layer might
> > + * schedule queuecommand during this time, hence, writting to IOARRIN
> > + * must be protect by host_lock
> > + */
> > + pmcraid_send_cmd(cmd, pmcraid_erp_done,
> > + PMCRAID_REQUEST_SENSE_TIMEOUT,
> > + pmcraid_timeout_handler);
> > +}
> > +
> > +/**
> > + * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
> > + * @cmd: command that failed
> > + * @sense: true if request_sense is required after cancel all
> > + *
> > + * This function sends a cancel all to a device to clear the queue.
> > + */
> > +static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
> > +{
> > + struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
> > + struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
> > + struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
> > + void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
> > + : pmcraid_request_sense;
> > +
> > + memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
> > + ioarcb->request_flags0 = SYNC_OVERRIDE;
> > + ioarcb->request_type = REQ_TYPE_IOACMD;
> > + ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
> > +
> > + if (RES_IS_GSCSI(res->cfg_entry))
> > + ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
> > +
> > + ioarcb->ioadl_bus_addr = 0;
> > + ioarcb->ioadl_length = 0;
> > + ioarcb->data_transfer_length = 0;
> > + ioarcb->ioarcb_bus_addr &= (~0x1FULL);
> > +
> > + /* writing to IOARRIN must be protected by host_lock, as mid-layer
> > + * schedule queuecommand while we are doing this
> > + */
> > + pmcraid_send_cmd(cmd, cmd_done,
> > + PMCRAID_REQUEST_SENSE_TIMEOUT,
> > + pmcraid_timeout_handler);
> > +}
> > +
> > +/**
> > + * pmcraid_frame_auto_sense: frame fixed format sense information
> > + *
> > + * @cmd: pointer to failing command block
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
> > +{
> > + u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
> > + struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
> > + struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
> > + u32 ioasc = le32_to_cpu(ioasa->ioasc);
> > + u32 failing_lba = 0;
> > +
> > + memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
> > + cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
> > +
> > + if (RES_IS_VSET(res->cfg_entry) &&
> > + ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
> > + ioasa->u.vset.failing_lba_hi != 0) {
> > +
> > + sense_buf[0] = 0x72;
> > + sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
> > + sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
> > + sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
> > +
> > + sense_buf[7] = 12;
> > + sense_buf[8] = 0;
> > + sense_buf[9] = 0x0A;
> > + sense_buf[10] = 0x80;
> > +
> > + failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
> > +
> > + sense_buf[12] = (failing_lba & 0xff000000) >> 24;
> > + sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
> > + sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
> > + sense_buf[15] = failing_lba & 0x000000ff;
> > +
> > + failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
> > +
> > + sense_buf[16] = (failing_lba & 0xff000000) >> 24;
> > + sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
> > + sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
> > + sense_buf[19] = failing_lba & 0x000000ff;
> > + } else {
> > + sense_buf[0] = 0x70;
> > + sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
> > + sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
> > + sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
> > +
> > + if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
> > + if (RES_IS_VSET(res->cfg_entry))
> > + failing_lba =
> > + le32_to_cpu(ioasa->u.
> > + vset.failing_lba_lo);
> > + sense_buf[0] |= 0x80;
> > + sense_buf[3] = (failing_lba >> 24) & 0xff;
> > + sense_buf[4] = (failing_lba >> 16) & 0xff;
> > + sense_buf[5] = (failing_lba >> 8) & 0xff;
> > + sense_buf[6] = failing_lba & 0xff;
> > + }
> > +
> > + sense_buf[7] = 6; /* additional length */
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_error_handler - Error response handlers for a SCSI op
> > + * @cmd: pointer to pmcraid_cmd that has failed
> > + *
> > + * This function determines whether or not to initiate ERP on the affected
> > + * device. This is called from a tasklet, which doesn't hold any locks.
> > + *
> > + * Return value:
> > + * 0 it caller can complete the request, otherwise 1 where in error
> > + * handler itself completes the request and returns the command block
> > + * back to free-pool
> > + */
> > +static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
> > +{
> > + struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
> > + struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
> > + u32 ioasc = le32_to_cpu(ioasa->ioasc);
> > + u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
> > + u32 sense_copied = 0;
> > +
> > + if (!res) {
> > + pmcraid_info("resource pointer is NULL\n");
> > + return 0;
> > + }
> > +
> > + /* If this was a SCSI read/write command keep count of errors */
> > + if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
> > + atomic_inc(&res->read_failures);
> > + else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
> > + atomic_inc(&res->write_failures);
> > +
> > + if (!RES_IS_GSCSI(res->cfg_entry) &&
> > + masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
> > + pmcraid_frame_auto_sense(cmd);
> > + }
> > +
> > + /* Log IOASC/IOASA information based on user settings */
> > + pmcraid_ioasc_logger(ioasc, cmd);
> > +
> > + switch (masked_ioasc) {
> > +
> > + case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
> > + scsi_cmd->result |= (DID_ABORT << 16);
> > + break;
> > +
> > + case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
> > + case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
> > + scsi_cmd->result |= (DID_NO_CONNECT << 16);
> > + break;
> > +
> > + case PMCRAID_IOASC_NR_SYNC_REQUIRED:
> > + res->sync_reqd = 1;
> > + scsi_cmd->result |= (DID_IMM_RETRY << 16);
> > + break;
> > +
> > + case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
> > + scsi_cmd->result |= (DID_PASSTHROUGH << 16);
> > + break;
> > +
> > + case PMCRAID_IOASC_UA_BUS_WAS_RESET:
> > + case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
> > + if (!res->reset_progress)
> > + scsi_report_bus_reset(pinstance->host,
> > + scsi_cmd->device->channel);
> > + scsi_cmd->result |= (DID_ERROR << 16);
> > + break;
> > +
> > + case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
> > + scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
> > + res->sync_reqd = 1;
> > +
> > + /* if check_condition is not active return with error otherwise
> > + * get/frame the sense buffer
> > + */
> > + if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
> > + SAM_STAT_CHECK_CONDITION &&
> > + PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
> > + return 0;
> > +
> > + /* If we have auto sense data as part of IOASA pass it to
> > + * mid-layer
> > + */
> > + if (ioasa->auto_sense_length != 0) {
> > + short sense_len = ioasa->auto_sense_length;
> > + int data_size = min_t(u16, le16_to_cpu(sense_len),
> > + SCSI_SENSE_BUFFERSIZE);
> > +
> > + memcpy(scsi_cmd->sense_buffer,
> > + ioasa->sense_data,
> > + data_size);
> > + sense_copied = 1;
> > + }
> > +
> > + if (RES_IS_GSCSI(res->cfg_entry)) {
> > + pmcraid_cancel_all(cmd, sense_copied);
> > + } else if (sense_copied) {
> > + pmcraid_erp_done(cmd);
> > + return 0;
> > + } else {
> > + pmcraid_request_sense(cmd);
> > + }
> > +
> > + return 1;
> > +
> > + case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
> > + break;
> > +
> > + default:
> > + if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
> > + scsi_cmd->result |= (DID_ERROR << 16);
> > + break;
> > + }
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_reset_device - device reset handler functions
> > + *
> > + * @scsi_cmd: scsi command struct
> > + * @modifier: reset modifier indicating the reset sequence to be performed
> > + *
> > + * This function issues a device reset to the affected device.
> > + * A LUN reset will be sent to the device first. If that does
> > + * not work, a target reset will be sent.
> > + *
> > + * Return value:
> > + * SUCCESS / FAILED
> > + */
> > +static int pmcraid_reset_device(
> > + struct scsi_cmnd *scsi_cmd,
> > + unsigned long timeout,
> > + u8 modifier
> > +)
> > +{
> > + struct pmcraid_cmd *cmd;
> > + struct pmcraid_instance *pinstance;
> > + struct pmcraid_resource_entry *res;
> > + struct pmcraid_ioarcb *ioarcb;
> > + unsigned long lock_flags;
> > + u32 ioasc;
> > +
> > + pinstance =
> > + (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
> > + res = scsi_cmd->device->hostdata;
> > +
> > + if (!res) {
> > + pmcraid_err("reset_device: NULL resource pointer\n");
> > + return FAILED;
> > + }
> > +
> > + /* If adapter is currently going through reset/reload, return failed.
> > + * This will force the mid-layer to call _eh_bus/host reset, which
> > + * will then go to sleep and wait for the reset to complete
> > + */
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > + if (pinstance->ioa_reset_in_progress ||
> > + pinstance->ioa_state == IOA_STATE_DEAD) {
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > + return FAILED;
> > + }
> > +
> > + res->reset_progress = 1;
> > + pmcraid_info("Resetting %s resource with addr %x\n",
> > + ((modifier & RESET_DEVICE_LUN) ? "LUN" :
> > + ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
> > + le32_to_cpu(res->cfg_entry.resource_address));
> > +
> > + /* get a free cmd block */
> > + cmd = pmcraid_get_free_cmd(pinstance);
> > +
> > + if (cmd == NULL) {
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > + pmcraid_err("%s: no cmd blocks are available\n", __func__);
> > + return FAILED;
> > + }
> > +
> > + ioarcb = &cmd->ioa_cb->ioarcb;
> > + ioarcb->resource_handle = res->cfg_entry.resource_handle;
> > + ioarcb->request_type = REQ_TYPE_IOACMD;
> > + ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
> > +
> > + /* Initialize reset modifier bits */
> > + if (modifier)
> > + modifier = ENABLE_RESET_MODIFIER | modifier;
> > +
> > + ioarcb->cdb[1] = modifier;
> > +
> > + init_completion(&cmd->wait_for_completion);
> > + cmd->completion_req = 1;
> > +
> > + pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
> > + le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
> > +
> > + pmcraid_send_cmd(cmd,
> > + pmcraid_internal_done,
> > + timeout,
> > + pmcraid_timeout_handler);
> > +
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > +
> > + /* RESET_DEVICE command completes after all pending IOARCBs are
> > + * completed. Once this command is completed, pmcraind_internal_done
> > + * will wake up the 'completion' queue.
> > + */
> > + wait_for_completion(&cmd->wait_for_completion);
> > +
> > + /* complete the command here itself and return the command block
> > + * to free list
> > + */
> > + pmcraid_return_cmd(cmd);
> > + res->reset_progress = 0;
> > + ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
> > +
> > + /* set the return value based on the returned ioasc */
> > + return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
> > +}
> > +
> > +/**
> > + * _pmcraid_io_done - helper for pmcraid_io_done function
> > + *
> > + * @cmd: pointer to pmcraid command struct
> > + * @reslen: residual data length to be set in the ioasa
> > + * @ioasc: ioasc either returned by IOA or set by driver itself.
> > + *
> > + * This function is invoked by pmcraid_io_done to complete mid-layer
> > + * scsi ops.
> > + *
> > + * Return value:
> > + * 0 if caller is required to return it to free_pool. Returns 1 if
> > + * caller need not worry about freeing command block as error handler
> > + * will take care of that.
> > + */
> > +
> > +static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
> > +{
> > + struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
> > + int rc = 0;
> > +
> > + scsi_set_resid(scsi_cmd, reslen);
> > +
> > + pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
> > + le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + ioasc, scsi_cmd->result);
> > +
> > + if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
> > + rc = pmcraid_error_handler(cmd);
> > +
> > + if (rc == 0) {
> > + scsi_dma_unmap(scsi_cmd);
> > + scsi_cmd->scsi_done(scsi_cmd);
> > + }
> > +
> > + return rc;
> > +}
> > +
> > +/**
> > + * pmcraid_io_done - SCSI completion function
> > + *
> > + * @cmd: pointer to pmcraid command struct
> > + *
> > + * This function is invoked by tasklet/mid-layer error handler to completing
> > + * the SCSI ops sent from mid-layer.
> > + *
> > + * Return value
> > + * none
> > + */
> > +
> > +static void pmcraid_io_done(struct pmcraid_cmd *cmd)
> > +{
> > + u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
> > + u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
> > +
> > + if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
> > + pmcraid_return_cmd(cmd);
> > +}
> > +
> > +/**
> > + * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
> > + *
> > + * @cmd: command block of the command to be aborted
> > + *
> > + * Return Value:
> > + * returns pointer to command structure used as cancelling cmd
> > + */
> > +static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_cmd *cancel_cmd;
> > + struct pmcraid_instance *pinstance;
> > + struct pmcraid_resource_entry *res;
> > +
> > + pinstance = (struct pmcraid_instance *)cmd->drv_inst;
> > + res = cmd->scsi_cmd->device->hostdata;
> > +
> > + cancel_cmd = pmcraid_get_free_cmd(pinstance);
> > +
> > + if (cancel_cmd == NULL) {
> > + pmcraid_err("%s: no cmd blocks are available\n", __func__);
> > + return NULL;
> > + }
> > +
> > + pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
> > +
> > + pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + cmd->ioa_cb->ioarcb.response_handle >> 2);
> > +
> > + init_completion(&cancel_cmd->wait_for_completion);
> > + cancel_cmd->completion_req = 1;
> > +
> > + pmcraid_info("command (%d) CDB[0] = %x for %x\n",
> > + le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
> > +
> > + pmcraid_send_cmd(cancel_cmd,
> > + pmcraid_internal_done,
> > + PMCRAID_INTERNAL_TIMEOUT,
> > + pmcraid_timeout_handler);
> > + return cancel_cmd;
> > +}
> > +
> > +/**
> > + * pmcraid_abort_complete - Waits for ABORT TASK completion
> > + *
> > + * @cancel_cmd: command block use as cancelling command
> > + *
> > + * Return Value:
> > + * returns SUCCESS if ABORT TASK has good completion
> > + * otherwise FAILED
> > + */
> > +static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
> > +{
> > + struct pmcraid_resource_entry *res;
> > + u32 ioasc;
> > +
> > + wait_for_completion(&cancel_cmd->wait_for_completion);
> > + res = cancel_cmd->u.res;
> > + cancel_cmd->u.res = NULL;
> > + ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
> > +
> > + /* If the abort task is not timed out we will get a Good completion
> > + * as sense_key, otherwise we may get one the following responses
> > + * due to subsquent bus reset or device reset. In case IOASC is
> > + * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
> > + */
> > + if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
> > + ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
> > + if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
> > + res->sync_reqd = 1;
> > + ioasc = 0;
> > + }
> > +
> > + /* complete the command here itself */
> > + pmcraid_return_cmd(cancel_cmd);
> > + return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
> > +}
> > +
> > +/**
> > + * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
> > + *
> > + * @scsi_cmd: scsi command struct given by mid-layer. When this is called
> > + * mid-layer ensures that no other commands are queued. This
> > + * never gets called under interrupt, but a separate eh thread.
> > + *
> > + * Return value:
> > + * SUCCESS / FAILED
> > + */
> > +static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
> > +{
> > + struct pmcraid_instance *pinstance;
> > + struct pmcraid_cmd *cmd;
> > + struct pmcraid_resource_entry *res;
> > + unsigned long host_lock_flags;
> > + unsigned long pending_lock_flags;
> > + struct pmcraid_cmd *cancel_cmd = NULL;
> > + int cmd_found = 0;
> > + int rc = FAILED;
> > +
> > + pinstance =
> > + (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
> > +
> > + dev_err(&pinstance->pdev->dev,
> > + "I/O command timed out, aborting it.\n");
> > +
> > + res = scsi_cmd->device->hostdata;
> > +
> > + if (res == NULL)
> > + return rc;
> > +
> > + /* If we are currently going through reset/reload, return failed.
> > + * This will force the mid-layer to eventually call
> > + * pmcraid_eh_host_reset which will then go to sleep and wait for the
> > + * reset to complete
> > + */
> > + spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
> > +
> > + if (pinstance->ioa_reset_in_progress ||
> > + pinstance->ioa_state == IOA_STATE_DEAD) {
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + host_lock_flags);
> > + return rc;
> > + }
> > +
> > + /* loop over pending cmd list to find cmd corresponding to this
> > + * scsi_cmd. Note that this command might not have been completed
> > + * already. locking: all pending commands are protected with
> > + * pending_pool_lock.
> > + */
> > + spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
> > + list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
> > +
> > + if (cmd->scsi_cmd == scsi_cmd) {
> > + cmd_found = 1;
> > + break;
> > + }
> > + }
> > +
> > + spin_unlock_irqrestore(&pinstance->pending_pool_lock,
> > + pending_lock_flags);
> > +
> > + /* If the command to be aborted was given to IOA and still pending with
> > + * it, send ABORT_TASK to abort this and wait for its completion
> > + */
> > + if (cmd_found)
> > + cancel_cmd = pmcraid_abort_cmd(cmd);
> > +
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + host_lock_flags);
> > +
> > + if (cancel_cmd) {
> > + cancel_cmd->u.res = cmd->scsi_cmd->device->hostdata;
> > + rc = pmcraid_abort_complete(cancel_cmd);
> > + }
> > +
> > + return cmd_found ? rc : SUCCESS;
> > +}
> > +
> > +/**
> > + * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
> > + *
> > + * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
> > + *
> > + * All these routines invokve pmcraid_reset_device with appropriate parameters.
> > + * Since these are called from mid-layer EH thread, no other IO will be queued
> > + * to the resource being reset. However, control path (IOCTL) may be active so
> > + * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
> > + * takes care by locking/unlocking host_lock.
> > + *
> > + * Return value
> > + * SUCCESS or FAILED
> > + */
> > +static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
> > +{
> > + pmcraid_err("Doing device reset due to an I/O command timeout.\n");
> > + return pmcraid_reset_device(scmd,
> > + PMCRAID_INTERNAL_TIMEOUT,
> > + RESET_DEVICE_LUN);
> > +}
> > +
> > +static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
> > +{
> > + pmcraid_err("Doing bus reset due to an I/O command timeout.\n");
> > + return pmcraid_reset_device(scmd,
> > + PMCRAID_RESET_BUS_TIMEOUT,
> > + RESET_DEVICE_BUS);
> > +}
> > +
> > +static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
> > +{
> > + pmcraid_err("Doing target reset due to an I/O command timeout.\n");
> > + return pmcraid_reset_device(scmd,
> > + PMCRAID_INTERNAL_TIMEOUT,
> > + RESET_DEVICE_TARGET);
> > +}
> > +
> > +/**
> > + * pmcraid_eh_host_reset_handler - adapter reset handler callback
> > + *
> > + * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
> > + *
> > + * Initiates adapter reset to bring it up to operational state
> > + *
> > + * Return value
> > + * SUCCESS or FAILED
> > + */
> > +static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
> > +{
> > + unsigned long interval = 10000; /* 10 seconds interval */
> > + int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
> > + struct pmcraid_instance *pinstance =
> > + (struct pmcraid_instance *)(scmd->device->host->hostdata);
> > +
> > +
> > + /* wait for an additional 150 seconds just in case firmware could come
> > + * up and if it could complete all the pending commands excluding the
> > + * two HCAM (CCN and LDN).
> > + */
> > + while (waits--) {
> > + if (atomic_read(&pinstance->outstanding_cmds) <=
> > + PMCRAID_MAX_HCAM_CMD)
> > + return SUCCESS;
> > + msleep(interval);
> > + }
> > +
> > + dev_err(&pinstance->pdev->dev,
> > + "Adapter being reset due to an I/O command timeout.\n");
> > + return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
> > +}
> > +
> > +/**
> > + * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
> > + * @scsi_cmd: scsi command struct
> > + *
> > + * Return value
> > + * number of tags or 0 if the task is not tagged
> > + */
> > +static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
> > +{
> > + char tag[2];
> > + u8 rc = 0;
> > +
> > + if (scsi_populate_tag_msg(scsi_cmd, tag)) {
> > + switch (tag[0]) {
> > + case MSG_SIMPLE_TAG:
> > + rc = TASK_TAG_SIMPLE;
> > + break;
> > + case MSG_HEAD_TAG:
> > + rc = TASK_TAG_QUEUE_HEAD;
> > + break;
> > + case MSG_ORDERED_TAG:
> > + rc = TASK_TAG_ORDERED;
> > + break;
> > + };
> > + }
> > +
> > + return rc;
> > +}
> > +
> > +
> > +/**
> > + * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
> > + * @cmd: pmcraid command struct
> > + * @sgcount: count of scatter-gather elements
> > + *
> > + * Return value
> > + * returns pointer pmcraid_ioadl_desc, initialized to point to internal
> > + * or external IOADLs
> > + */
> > +struct pmcraid_ioadl_desc *
> > +pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
> > +{
> > + struct pmcraid_ioadl_desc *ioadl;
> > + struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
> > + int ioadl_count = 0;
> > +
> > + if (ioarcb->add_cmd_param_length)
> > + ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
> > + ioarcb->ioadl_length =
> > + sizeof(struct pmcraid_ioadl_desc) * sgcount;
> > +
> > + if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
> > + /* external ioadls start at offset 0x80 from control_block
> > + * structure, re-using 24 out of 27 ioadls part of IOARCB.
> > + * It is necessary to indicate to firmware that driver is
> > + * using ioadls to be treated as external to IOARCB.
> > + */
> > + ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
> > + ioarcb->ioadl_bus_addr =
> > + cpu_to_le64((cmd->ioa_cb_bus_addr) +
> > + offsetof(struct pmcraid_ioarcb,
> > + add_data.u.ioadl[3]));
> > + ioadl = &ioarcb->add_data.u.ioadl[3];
> > + } else {
> > + ioarcb->ioadl_bus_addr =
> > + cpu_to_le64((cmd->ioa_cb_bus_addr) +
> > + offsetof(struct pmcraid_ioarcb,
> > + add_data.u.ioadl[ioadl_count]));
> > +
> > + ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
> > + ioarcb->ioarcb_bus_addr |=
> > + DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
> > + }
> > +
> > + return ioadl;
> > +}
> > +
> > +/**
> > + * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
> > + * @pinstance: pointer to adapter instance structure
> > + * @cmd: pmcraid command struct
> > + *
> > + * This function is invoked by queuecommand entry point while sending a command
> > + * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
> > + *
> > + * Return value:
> > + * 0 on success or -1 on failure
> > + */
> > +static int pmcraid_build_ioadl(
> > + struct pmcraid_instance *pinstance,
> > + struct pmcraid_cmd *cmd
> > +)
> > +{
> > + int i, nseg;
> > + struct scatterlist *sglist;
> > +
> > + struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
> > + struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
> > + struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
> > +
> > + u32 length = scsi_bufflen(scsi_cmd);
> > +
> > + if (!length)
> > + return 0;
> > +
> > + nseg = scsi_dma_map(scsi_cmd);
> > +
> > + if (nseg < 0) {
> > + dev_err(&pinstance->pdev->dev, "scsi_map_dma failed!\n");
> > + return -1;
> > + } else if (nseg > PMCRAID_MAX_IOADLS) {
> > + scsi_dma_unmap(scsi_cmd);
> > + dev_err(&pinstance->pdev->dev,
> > + "sg count is (%d) more than allowed!\n", nseg);
> > + return -1;
> > + }
> > +
> > + /* Initialize IOARCB data transfer length fields */
> > + if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
> > + ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
> > +
> > + ioarcb->request_flags0 |= NO_LINK_DESCS;
> > + ioarcb->data_transfer_length = cpu_to_le32(length);
> > + ioadl = pmcraid_init_ioadls(cmd, nseg);
> > +
> > + /* Initialize IOADL descriptor addresses */
> > + scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
> > + ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
> > + ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
> > + ioadl[i].flags = 0;
> > + }
> > + /* setup last descriptor */
> > + ioadl[i - 1].flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC);
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_free_sglist - Frees an allocated SG buffer list
> > + * @sglist: scatter/gather list pointer
> > + *
> > + * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < sglist->num_sg; i++)
> > + __free_pages(sg_page(&(sglist->scatterlist[i])),
> > + sglist->order);
> > +
> > + kfree(sglist);
> > +}
> > +
> > +/**
> > + * pmcraid_alloc_sglist - Allocates memory for a SG list
> > + * @buflen: buffer length
> > + *
> > + * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
> > + * list.
> > + *
> > + * Return value
> > + * pointer to sglist / NULL on failure
> > + */
> > +static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
> > +{
> > + struct pmcraid_sglist *sglist;
> > + struct scatterlist *scatterlist;
> > + struct page *page;
> > + int num_elem, i, j;
> > + int sg_size;
> > + int order;
> > + int bsize_elem;
> > +
> > + sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
> > + order = (sg_size > 0) ? get_order(sg_size) : 0;
> > + bsize_elem = PAGE_SIZE * (1 << order);
> > +
> > + /* Determine the actual number of sg entries needed */
> > + if (buflen % bsize_elem)
> > + num_elem = (buflen / bsize_elem) + 1;
> > + else
> > + num_elem = buflen / bsize_elem;
> > +
> > + /* Allocate a scatter/gather list for the DMA */
> > + sglist = kzalloc(sizeof(struct pmcraid_sglist) +
> > + (sizeof(struct scatterlist) * (num_elem - 1)),
> > + GFP_KERNEL);
> > +
> > + if (sglist == NULL)
> > + return NULL;
> > +
> > + scatterlist = sglist->scatterlist;
> > + sg_init_table(scatterlist, num_elem);
> > + sglist->order = order;
> > + sglist->num_sg = num_elem;
> > + sg_size = buflen;
> > +
> > + for (i = 0; i < num_elem; i++) {
> > + page = alloc_pages(GFP_KERNEL|GFP_DMA, order);
> > + if (!page) {
> > + for (j = i - 1; j >= 0; j--)
> > + __free_pages(sg_page(&scatterlist[j]), order);
> > + kfree(sglist);
> > + return NULL;
> > + }
> > +
> > + sg_set_page(&scatterlist[i], page,
> > + sg_size < bsize_elem ? sg_size : bsize_elem, 0);
> > + sg_size -= bsize_elem;
> > + }
> > +
> > + return sglist;
> > +}
> > +
> > +/**
> > + * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
> > + * @sglist: scatter/gather list pointer
> > + * @buffer: buffer pointer
> > + * @len: buffer length
> > + * @direction: data transfer direction
> > + *
> > + * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
> > + *
> > + * Return value:
> > + * 0 on success / other on failure
> > + */
> > +static int pmcraid_copy_sglist(
> > + struct pmcraid_sglist *sglist,
> > + unsigned long buffer,
> > + u32 len,
> > + int direction
> > +)
> > +{
> > + struct scatterlist *scatterlist;
> > + void *kaddr;
> > + int bsize_elem;
> > + int i;
> > + int rc = 0;
> > +
> > + /* Determine the actual number of bytes per element */
> > + bsize_elem = PAGE_SIZE * (1 << sglist->order);
> > +
> > + scatterlist = sglist->scatterlist;
> > +
> > + for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
> > + struct page *page = sg_page(&scatterlist[i]);
> > +
> > + kaddr = kmap(page);
> > + if (direction == DMA_TO_DEVICE)
> > + rc = __copy_from_user(kaddr,
> > + (void *)buffer,
> > + bsize_elem);
> > + else
> > + rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
> > +
> > + kunmap(page);
> > +
> > + if (rc) {
> > + pmcraid_err("failed to copy user data into sg list\n");
> > + return -EFAULT;
> > + }
> > +
> > + scatterlist[i].length = bsize_elem;
> > + }
> > +
> > + if (len % bsize_elem) {
> > + struct page *page = sg_page(&scatterlist[i]);
> > +
> > + kaddr = kmap(page);
> > +
> > + if (direction == DMA_TO_DEVICE)
> > + rc = __copy_from_user(kaddr,
> > + (void *)buffer,
> > + len % bsize_elem);
> > + else
> > + rc = __copy_to_user((void *)buffer,
> > + kaddr,
> > + len % bsize_elem);
> > +
> > + kunmap(page);
> > +
> > + scatterlist[i].length = len % bsize_elem;
> > + }
> > +
> > + if (rc) {
> > + pmcraid_err("failed to copy user data into sg list\n");
> > + rc = -EFAULT;
> > + }
> > +
> > + return rc;
> > +}
> > +
> > +/**
> > + * pmcraid_queuecommand - Queue a mid-layer request
> > + * @scsi_cmd: scsi command struct
> > + * @done: done function
> > + *
> > + * This function queues a request generated by the mid-layer. Midlayer calls
> > + * this routine within host->lock. Some of the functions called by queuecommand
> > + * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
> > + *
> > + * Return value:
> > + * 0 on success
> > + * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
> > + * SCSI_MLQUEUE_HOST_BUSY if host is busy
> > + */
> > +static int pmcraid_queuecommand(
> > + struct scsi_cmnd *scsi_cmd,
> > + void (*done) (struct scsi_cmnd *)
> > +)
> > +{
> > + struct pmcraid_instance *pinstance;
> > + struct pmcraid_resource_entry *res;
> > + struct pmcraid_ioarcb *ioarcb;
> > + struct pmcraid_cmd *cmd;
> > + int rc = 0;
> > +
> > + pinstance =
> > + (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
> > +
> > + scsi_cmd->scsi_done = done;
> > + res = scsi_cmd->device->hostdata;
> > + scsi_cmd->result = (DID_OK << 16);
> > +
> > + /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
> > + * the command
> > + */
> > + if (pinstance->ioa_state == IOA_STATE_DEAD) {
> > + pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
> > + scsi_cmd->result = (DID_NO_CONNECT << 16);
> > + scsi_cmd->scsi_done(scsi_cmd);
> > + return 0;
> > + }
> > +
> > + /* If IOA reset is in progress, can't queue the commands */
> > + if (pinstance->ioa_reset_in_progress)
> > + return SCSI_MLQUEUE_HOST_BUSY;
> > +
> > + /* initialize the command and IOARCB to be sent to IOA */
> > + cmd = pmcraid_get_free_cmd(pinstance);
> > +
> > + if (cmd == NULL) {
> > + pmcraid_err("free command block is not available\n");
> > + return SCSI_MLQUEUE_HOST_BUSY;
> > + }
> > +
> > + cmd->scsi_cmd = scsi_cmd;
> > + ioarcb = &(cmd->ioa_cb->ioarcb);
> > + memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
> > + ioarcb->resource_handle = res->cfg_entry.resource_handle;
> > + ioarcb->request_type = REQ_TYPE_SCSI;
> > +
> > + cmd->cmd_done = pmcraid_io_done;
> > +
> > + if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
> > + if (scsi_cmd->underflow == 0)
> > + ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
> > +
> > + if (res->sync_reqd) {
> > + ioarcb->request_flags0 |= SYNC_COMPLETE;
> > + res->sync_reqd = 0;
> > + }
> > +
> > + ioarcb->request_flags0 |= NO_LINK_DESCS;
> > + ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
> > +
> > + if (RES_IS_GSCSI(res->cfg_entry))
> > + ioarcb->request_flags1 |= DELAY_AFTER_RESET;
> > + }
> > +
> > + rc = pmcraid_build_ioadl(pinstance, cmd);
> > +
> > + pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
> > + le32_to_cpu(ioarcb->response_handle) >> 2,
> > + scsi_cmd->cmnd[0], pinstance->host->unique_id,
> > + RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
> > + PMCRAID_PHYS_BUS_ID,
> > + RES_IS_VSET(res->cfg_entry) ?
> > + res->cfg_entry.unique_flags1 :
> > + RES_TARGET(res->cfg_entry.resource_address),
> > + RES_LUN(res->cfg_entry.resource_address));
> > +
> > + if (likely(rc == 0)) {
> > + _pmcraid_fire_command(cmd);
> > + } else {
> > + pmcraid_err("queuecommand could not build ioadl\n");
> > + pmcraid_return_cmd(cmd);
> > + rc = SCSI_MLQUEUE_HOST_BUSY;
> > + }
> > +
> > + return rc;
> > +}
> > +
> > +/**
> > + * pmcraid_open -char node "open" entry, allowed only users with admin access
> > + */
> > +static int pmcraid_chr_open(struct inode *inode, struct file *filep)
> > +{
> > + struct pmcraid_instance *pinstance;
> > +
> > + if (!capable(CAP_SYS_ADMIN))
> > + return -EACCES;
> > +
> > + /* Populate adapter instance * pointer for use by ioctl */
> > + pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
> > + filep->private_data = pinstance;
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_release - char node "release" entry point
> > + */
> > +static int pmcraid_chr_release(struct inode *inode, struct file *filep)
> > +{
> > + struct pmcraid_instance *pinstance =
> > + ((struct pmcraid_instance *)filep->private_data);
> > +
> > + filep->private_data = NULL;
> > + fasync_helper(-1, filep, 0, &pinstance->aen_queue);
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_fasync - Async notifier registration from applications
> > + *
> > + * This function adds the calling process to a driver global queue. When an
> > + * event occurs, SIGIO will be sent to all processes in this queue.
> > + */
> > +static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
> > +{
> > + struct pmcraid_instance *pinstance;
> > + int rc;
> > +
> > + pinstance = (struct pmcraid_instance *)filep->private_data;
> > + mutex_lock(&pinstance->aen_queue_lock);
> > + rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
> > + mutex_unlock(&pinstance->aen_queue_lock);
> > +
> > + return rc;
> > +}
> > +
> > +
> > +/**
> > + * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
> > + * commands sent over IOCTL interface
> > + *
> > + * @cmd : pointer to struct pmcraid_cmd
> > + * @buflen : length of the request buffer
> > + * @direction : data transfer direction
> > + *
> > + * Return value
> > + * 0 on sucess, non-zero error code on failure
> > + */
> > +static int pmcraid_build_passthrough_ioadls(
> > + struct pmcraid_cmd *cmd,
> > + int buflen,
> > + int direction
> > +)
> > +{
> > + struct pmcraid_sglist *sglist = NULL;
> > + struct scatterlist *sg = NULL;
> > + struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
> > + struct pmcraid_ioadl_desc *ioadl;
> > + int i;
> > +
> > + sglist = pmcraid_alloc_sglist(buflen);
> > +
> > + if (!sglist) {
> > + pmcraid_err("can't allocate memory for passthrough SGls\n");
> > + return -ENOMEM;
> > + }
> > +
> > + sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
> > + sglist->scatterlist,
> > + sglist->num_sg, direction);
> > +
> > + if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
> > + dev_err(&cmd->drv_inst->pdev->dev,
> > + "Failed to map passthrough buffer!\n");
> > + pmcraid_free_sglist(sglist);
> > + return -EIO;
> > + }
> > +
> > + cmd->sglist = sglist;
> > + ioarcb->request_flags0 |= NO_LINK_DESCS;
> > +
> > + ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
> > +
> > + /* Initialize IOADL descriptor addresses */
> > + for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
> > + ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
> > + ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
> > + ioadl[i].flags = 0;
> > + }
> > +
> > + /* setup the last descriptor */
> > + ioadl[i - 1].flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC);
> > +
> > + return 0;
> > +}
> > +
> > +
> > +/**
> > + * pmcraid_release_passthrough_ioadls - release passthrough ioadls
> > + *
> > + * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
> > + * @buflen: size of the request buffer
> > + * @direction: data transfer direction
> > + *
> > + * Return value
> > + * 0 on sucess, non-zero error code on failure
> > + */
> > +static void pmcraid_release_passthrough_ioadls(
> > + struct pmcraid_cmd *cmd,
> > + int buflen,
> > + int direction
> > +)
> > +{
> > + struct pmcraid_sglist *sglist = cmd->sglist;
> > +
> > + if (buflen > 0) {
> > + pci_unmap_sg(cmd->drv_inst->pdev,
> > + sglist->scatterlist,
> > + sglist->num_sg,
> > + direction);
> > + pmcraid_free_sglist(sglist);
> > + cmd->sglist = NULL;
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + * @cmd: ioctl code
> > + * @arg: pointer to pmcraid_passthrough_buffer user buffer
> > + *
> > + * Return value
> > + * 0 on sucess, non-zero error code on failure
> > + */
> > +static long pmcraid_ioctl_passthrough(
> > + struct pmcraid_instance *pinstance,
> > + unsigned int ioctl_cmd,
> > + unsigned int buflen,
> > + unsigned long arg
> > +)
> > +{
> > + struct pmcraid_passthrough_ioctl_buffer *buffer;
> > + struct pmcraid_ioarcb *ioarcb;
> > + struct pmcraid_cmd *cmd;
> > + struct pmcraid_cmd *cancel_cmd;
> > + unsigned long request_buffer;
> > + unsigned long request_offset;
> > + unsigned long lock_flags;
> > + int request_size;
> > + int buffer_size;
> > + u8 access, direction;
> > + int rc = 0;
> > +
> > + /* If IOA reset is in progress, wait 10 secs for reset to complete */
> > + if (pinstance->ioa_reset_in_progress) {
> > + rc = wait_event_interruptible_timeout(
> > + pinstance->reset_wait_q,
> > + !pinstance->ioa_reset_in_progress,
> > + msecs_to_jiffies(10000));
> > +
> > + if (!rc)
> > + return -ETIMEDOUT;
> > + else if (rc < 0)
> > + return -ERESTARTSYS;
> > + }
> > +
> > + /* If adapter is not in operational state, return error */
> > + if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
> > + pmcraid_err("IOA is not operational\n");
> > + return -ENOTTY;
> > + }
> > +
> > + buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
> > + buffer = kmalloc(buffer_size, GFP_KERNEL);
> > +
> > + if (!buffer) {
> > + pmcraid_err("no memory for passthrough buffer\n");
> > + return -ENOMEM;
> > + }
> > +
> > + request_offset =
> > + offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
> > +
> > + request_buffer = arg + request_offset;
> > +
> > + rc = __copy_from_user(buffer,
> > + (struct pmcraid_passthrough_ioctl_buffer *) arg,
> > + sizeof(struct pmcraid_passthrough_ioctl_buffer));
> > + if (rc) {
> > + pmcraid_err("ioctl: can't copy passthrough buffer\n");
> > + rc = -EFAULT;
> > + goto out_free_buffer;
> > + }
> > +
> > + request_size = buffer->ioarcb.data_transfer_length;
> > +
> > + if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
> > + access = VERIFY_READ;
> > + direction = DMA_TO_DEVICE;
> > + } else {
> > + access = VERIFY_WRITE;
> > + direction = DMA_FROM_DEVICE;
> > + }
> > +
> > + if (request_size > 0) {
> > + rc = access_ok(access, arg, request_offset + request_size);
> > +
> > + if (!rc) {
> > + rc = -EFAULT;
> > + goto out_free_buffer;
> > + }
> > + }
> > +
> > + /* check if we have any additional command parameters */
> > + if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
> > + rc = -EINVAL;
> > + goto out_free_buffer;
> > + }
> > +
> > + cmd = pmcraid_get_free_cmd(pinstance);
> > +
> > + if (!cmd) {
> > + pmcraid_err("free command block is not available\n");
> > + rc = -ENOMEM;
> > + goto out_free_buffer;
> > + }
> > +
> > + cmd->scsi_cmd = NULL;
> > + ioarcb = &(cmd->ioa_cb->ioarcb);
> > +
> > + /* Copy the user-provided IOARCB stuff field by field */
> > + ioarcb->resource_handle = buffer->ioarcb.resource_handle;
> > + ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
> > + ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
> > + ioarcb->request_type = buffer->ioarcb.request_type;
> > + ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
> > + ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
> > + memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
> > +
> > + if (buffer->ioarcb.add_cmd_param_length) {
> > + ioarcb->add_cmd_param_length =
> > + buffer->ioarcb.add_cmd_param_length;
> > + ioarcb->add_cmd_param_offset =
> > + buffer->ioarcb.add_cmd_param_offset;
> > + memcpy(ioarcb->add_data.u.add_cmd_params,
> > + buffer->ioarcb.add_data.u.add_cmd_params,
> > + buffer->ioarcb.add_cmd_param_length);
> > + }
> > +
> > + if (request_size) {
> > + rc = pmcraid_build_passthrough_ioadls(cmd,
> > + request_size,
> > + direction);
> > + if (rc) {
> > + pmcraid_err("couldn't build passthrough ioadls\n");
> > + goto out_free_buffer;
> > + }
> > + }
> > +
> > + /* If data is being written into the device, copy the data from user
> > + * buffers
> > + */
> > + if (direction == DMA_TO_DEVICE && request_size > 0) {
> > + rc = pmcraid_copy_sglist(cmd->sglist,
> > + request_buffer,
> > + request_size,
> > + direction);
> > + if (rc) {
> > + pmcraid_err("failed to copy user buffer\n");
> > + goto out_free_sglist;
> > + }
> > + }
> > +
> > + /* passthrough ioctl is a blocking command so, put the user to sleep
> > + * until timeout. Note that a timeout value of 0 means, do timeout.
> > + */
> > + cmd->cmd_done = pmcraid_internal_done;
> > + init_completion(&cmd->wait_for_completion);
> > + cmd->completion_req = 1;
> > +
> > + pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
> > + le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
> > + cmd->ioa_cb->ioarcb.cdb[0],
> > + le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
> > +
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > + _pmcraid_fire_command(cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > +
> > + /* If command timeout is specified put caller to wait till that time,
> > + * otherwise it would be blocking wait. If command gets timed out, it
> > + * will be aborted.
> > + */
> > + if (buffer->ioarcb.cmd_timeout == 0) {
> > + wait_for_completion(&cmd->wait_for_completion);
> > + } else if (!wait_for_completion_timeout(
> > + &cmd->wait_for_completion,
> > + msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
> > +
> > + pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
> > + le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
> > + cmd->ioa_cb->ioarcb.cdb[0]);
> > +
> > + rc = -ETIMEDOUT;
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > + cancel_cmd = pmcraid_abort_cmd(cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > +
> > + if (cancel_cmd) {
> > + wait_for_completion(&cancel_cmd->wait_for_completion);
> > + pmcraid_return_cmd(cancel_cmd);
> > + }
> > +
> > + goto out_free_sglist;
> > + }
> > +
> > + /* If the command failed for any reason, copy entire IOASA buffer and
> > + * return IOCTL success. If copying IOASA to user-buffer fails, return
> > + * EFAULT
> > + */
> > + if (le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)) {
> > +
> > + void *ioasa =
> > + (void *)(arg +
> > + offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
> > +
> > + pmcraid_info("command failed with %x\n",
> > + le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
> > + if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
> > + sizeof(struct pmcraid_ioasa))) {
> > + pmcraid_err("failed to copy ioasa buffer to user\n");
> > + rc = -EFAULT;
> > + }
> > + }
> > + /* If the data transfer was from device, copy the data onto user
> > + * buffers
> > + */
> > + else if (direction == DMA_FROM_DEVICE && request_size > 0) {
> > + rc = pmcraid_copy_sglist(cmd->sglist,
> > + request_buffer,
> > + request_size,
> > + direction);
> > + if (rc) {
> > + pmcraid_err("failed to copy user buffer\n");
> > + rc = -EFAULT;
> > + }
> > + }
> > +
> > +out_free_sglist:
> > + pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
> > + pmcraid_return_cmd(cmd);
> > +
> > +out_free_buffer:
> > + kfree(buffer);
> > +
> > + return rc;
> > +}
> > +
> > +
> > +
> > +
> > +/**
> > + * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + * @cmd: ioctl command passed in
> > + * @buflen: length of user_buffer
> > + * @user_buffer: user buffer pointer
> > + *
> > + * Return Value
> > + * 0 in case of success, otherwise appropriate error code
> > + */
> > +static long pmcraid_ioctl_driver(
> > + struct pmcraid_instance *pinstance,
> > + unsigned int cmd,
> > + unsigned int buflen,
> > + void __user *user_buffer
> > +)
> > +{
> > + int rc = -ENOSYS;
> > +
> > + if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
> > + pmcraid_err("ioctl_driver: access fault in request buffer \n");
> > + return -EFAULT;
> > + }
> > +
> > + switch (cmd) {
> > + case PMCRAID_IOCTL_RESET_ADAPTER:
> > + pmcraid_reset_bringup(pinstance);
> > + rc = 0;
> > + break;
> > +
> > + default:
> > + break;
> > + }
> > +
> > + return rc;
> > +}
> > +
> > +/**
> > + * pmcraid_check_ioctl_buffer - check for proper access to user buffer
> > + *
> > + * @cmd: ioctl command
> > + * @arg: user buffer
> > + * @hdr: pointer to kernel memory for pmcraid_ioctl_header
> > + *
> > + * Return Value
> > + * negetive error code if there are access issues, otherwise zero.
> > + * Upon success, returns ioctl header copied out of user buffer.
> > + */
> > +
> > +static int pmcraid_check_ioctl_buffer(
> > + int cmd,
> > + void __user *arg,
> > + struct pmcraid_ioctl_header *hdr
> > +)
> > +{
> > + int rc = 0;
> > + int access = VERIFY_READ;
> > +
> > + if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
> > + pmcraid_err("couldn't copy ioctl header from user buffer\n");
> > + return -EFAULT;
> > + }
> > +
> > + /* check for valid driver signature */
> > + rc = memcmp(hdr->signature,
> > + PMCRAID_IOCTL_SIGNATURE,
> > + sizeof(hdr->signature));
> > + if (rc) {
> > + pmcraid_err("signature verification failed\n");
> > + return -EINVAL;
> > + }
> > +
> > + /* buffer length can't be negetive */
> > + if (hdr->buffer_length < 0) {
> > + pmcraid_err("ioctl: invalid buffer length specified\n");
> > + return -EINVAL;
> > + }
> > +
> > + /* check for appropriate buffer access */
> > + if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
> > + access = VERIFY_WRITE;
> > +
> > + rc = access_ok(access,
> > + (arg + sizeof(struct pmcraid_ioctl_header)),
> > + hdr->buffer_length);
> > + if (!rc) {
> > + pmcraid_err("access failed for user buffer of size %d\n",
> > + hdr->buffer_length);
> > + return -EFAULT;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_ioctl - char node ioctl entry point
> > + */
> > +static long pmcraid_chr_ioctl(
> > + struct file *filep,
> > + unsigned int cmd,
> > + unsigned long arg
> > +)
> > +{
> > + struct pmcraid_instance *pinstance = NULL;
> > + struct pmcraid_ioctl_header *hdr = NULL;
> > + int retval = -ENOTTY;
> > +
> > + hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header));
> > +
> > + if (!hdr) {
> > + pmcraid_err("faile to allocate memory for ioctl header\n");
> > + return -ENOMEM;
> > + }
> > +
> > + retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
> > +
> > + if (retval) {
> > + pmcraid_info("chr_ioctl: header check failed\n");
> > + kfree(hdr);
> > + return retval;
> > + }
> > +
> > + pinstance = (struct pmcraid_instance *)filep->private_data;
> > +
> > + if (!pinstance) {
> > + pmcraid_info("adapter instance is not found\n");
> > + kfree(hdr);
> > + return -ENOTTY;
> > + }
> > +
> > + switch (_IOC_TYPE(cmd)) {
> > +
> > + case PMCRAID_PASSTHROUGH_IOCTL:
> > + /* If ioctl code is to download microcode, we need to block
> > + * mid-layer requests.
> > + */
> > + if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
> > + scsi_block_requests(pinstance->host);
> > +
> > + retval = pmcraid_ioctl_passthrough(pinstance,
> > + cmd,
> > + hdr->buffer_length,
> > + arg);
> > +
> > + if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
> > + scsi_unblock_requests(pinstance->host);
> > + break;
> > +
> > + case PMCRAID_DRIVER_IOCTL:
> > + arg += sizeof(struct pmcraid_ioctl_header);
> > + retval = pmcraid_ioctl_driver(pinstance,
> > + cmd,
> > + hdr->buffer_length,
> > + (void __user *)arg);
> > + break;
> > +
> > + default:
> > + retval = -ENOTTY;
> > + break;
> > + }
> > +
> > + kfree(hdr);
> > +
> > + return retval;
> > +}
> > +
> > +/**
> > + * File operations structure for management interface
> > + */
> > +static const struct file_operations pmcraid_fops = {
> > + .owner = THIS_MODULE,
> > + .open = pmcraid_chr_open,
> > + .release = pmcraid_chr_release,
> > + .fasync = pmcraid_chr_fasync,
> > + .unlocked_ioctl = pmcraid_chr_ioctl,
> > +#ifdef CONFIG_COMPAT
> > + .compat_ioctl = pmcraid_chr_ioctl,
> > +#endif
> > +};
> > +
> > +
> > +
> > +
> > +/**
> > + * pmcraid_show_log_level - Display adapter's error logging level
> > + * @dev: class device struct
> > + * @buf: buffer
> > + *
> > + * Return value:
> > + * number of bytes printed to buffer
> > + */
> > +static ssize_t pmcraid_show_log_level(
> > + struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf)
> > +{
> > + struct Scsi_Host *shost = class_to_shost(dev);
> > + struct pmcraid_instance *pinstance =
> > + (struct pmcraid_instance *)shost->hostdata;
> > + return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
> > +}
> > +
> > +/**
> > + * pmcraid_store_log_level - Change the adapter's error logging level
> > + * @dev: class device struct
> > + * @buf: buffer
> > + * @count: not used
> > + *
> > + * Return value:
> > + * number of bytes printed to buffer
> > + */
> > +static ssize_t pmcraid_store_log_level(
> > + struct device *dev,
> > + struct device_attribute *attr,
> > + const char *buf,
> > + size_t count
> > +)
> > +{
> > + struct Scsi_Host *shost;
> > + struct pmcraid_instance *pinstance;
> > + unsigned long val;
> > +
> > + if (strict_strtoul(buf, 10, &val))
> > + return -EINVAL;
> > + /* log-level should be from 0 to 2 */
> > + if (val > 2)
> > + return -EINVAL;
> > +
> > + shost = class_to_shost(dev);
> > + pinstance = (struct pmcraid_instance *)shost->hostdata;
> > + pinstance->current_log_level = val;
> > +
> > + return strlen(buf);
> > +}
> > +
> > +static struct device_attribute pmcraid_log_level_attr = {
> > + .attr = {
> > + .name = "log_level",
> > + .mode = S_IRUGO | S_IWUSR,
> > + },
> > + .show = pmcraid_show_log_level,
> > + .store = pmcraid_store_log_level,
> > +};
> > +
> > +/**
> > + * pmcraid_show_drv_version - Display driver version
> > + * @dev: class device struct
> > + * @buf: buffer
> > + *
> > + * Return value:
> > + * number of bytes printed to buffer
> > + */
> > +static ssize_t pmcraid_show_drv_version(
> > + struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf
> > +)
> > +{
> > + return snprintf(buf, PAGE_SIZE, "version: %s, build date: %s\n",
> > + PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
> > +}
> > +
> > +static struct device_attribute pmcraid_driver_version_attr = {
> > + .attr = {
> > + .name = "drv_version",
> > + .mode = S_IRUGO,
> > + },
> > + .show = pmcraid_show_drv_version,
> > +};
> > +
> > +/**
> > + * pmcraid_show_io_adapter_id - Display driver assigned adapter id
> > + * @dev: class device struct
> > + * @buf: buffer
> > + *
> > + * Return value:
> > + * number of bytes printed to buffer
> > + */
> > +static ssize_t pmcraid_show_adapter_id(
> > + struct device *dev,
> > + struct device_attribute *attr,
> > + char *buf
> > +)
> > +{
> > + struct Scsi_Host *shost = class_to_shost(dev);
> > + struct pmcraid_instance *pinstance =
> > + (struct pmcraid_instance *)shost->hostdata;
> > + u32 adapter_id = (pinstance->pdev->bus->number << 8) |
> > + pinstance->pdev->devfn;
> > + u32 aen_group = pmcraid_event_family.id;
> > +
> > + return snprintf(buf, PAGE_SIZE,
> > + "adapter id: %d\nminor: %d\naen group: %d\n",
> > + adapter_id, MINOR(pinstance->cdev.dev), aen_group);
> > +}
> > +
> > +static struct device_attribute pmcraid_adapter_id_attr = {
> > + .attr = {
> > + .name = "adapter_id",
> > + .mode = S_IRUGO | S_IWUSR,
> > + },
> > + .show = pmcraid_show_adapter_id,
> > +};
> > +
> > +static struct device_attribute *pmcraid_host_attrs[] = {
> > + &pmcraid_log_level_attr,
> > + &pmcraid_driver_version_attr,
> > + &pmcraid_adapter_id_attr,
> > + NULL,
> > +};
> > +
> > +
> > +/* host template structure for pmcraid driver */
> > +static struct scsi_host_template pmcraid_host_template = {
> > + .module = THIS_MODULE,
> > + .name = PMCRAID_DRIVER_NAME,
> > + .queuecommand = pmcraid_queuecommand,
> > + .eh_abort_handler = pmcraid_eh_abort_handler,
> > + .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
> > + .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
> > + .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
> > + .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
> > +
> > + .slave_alloc = pmcraid_slave_alloc,
> > + .slave_configure = pmcraid_slave_configure,
> > + .slave_destroy = pmcraid_slave_destroy,
> > + .change_queue_depth = pmcraid_change_queue_depth,
> > + .change_queue_type = pmcraid_change_queue_type,
> > + .can_queue = PMCRAID_MAX_IO_CMD,
> > + .this_id = -1,
> > + .sg_tablesize = PMCRAID_MAX_IOADLS,
> > + .max_sectors = PMCRAID_IOA_MAX_SECTORS,
> > + .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
> > + .use_clustering = ENABLE_CLUSTERING,
> > + .shost_attrs = pmcraid_host_attrs,
> > + .proc_name = PMCRAID_DRIVER_NAME
> > +};
> > +
> > +/**
> > + * pmcraid_isr_common - Common interrupt handler routine
> > + *
> > + * @pinstance: pointer to adapter instance
> > + * @intrs: active interrupts (contents of ioa_host_interrupt register)
> > + * @hrrq_id: Host RRQ index
> > + *
> > + * Return Value
> > + * none
> > + */
> > +static void pmcraid_isr_common(
> > + struct pmcraid_instance *pinstance,
> > + u32 intrs,
> > + int hrrq_id
> > +)
> > +{
> > + u32 intrs_clear =
> > + (intrs & INTRS_CRITICAL_OP_IN_PROGRESS) ? intrs
> > + : INTRS_HRRQ_VALID;
> > + iowrite32(intrs_clear,
> > + pinstance->int_regs.ioa_host_interrupt_clr_reg);
> > + intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
> > +
> > + /* hrrq valid bit was set, schedule tasklet to handle the response */
> > + if (intrs_clear == INTRS_HRRQ_VALID)
> > + tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
> > +}
> > +
> > +/**
> > + * pmcraid_isr - implements interrupt handling routine
> > + *
> > + * @irq: interrupt vector number
> > + * @dev_id: pointer hrrq_vector
> > + *
> > + * Return Value
> > + * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
> > + */
> > +static irqreturn_t pmcraid_isr(int irq, void *dev_id)
> > +{
> > + struct pmcraid_isr_param *hrrq_vector;
> > + struct pmcraid_instance *pinstance;
> > + unsigned long lock_flags;
> > + u32 intrs;
> > +
> > + /* In case of legacy interrupt mode where interrupts are shared across
> > + * isrs, it may be possible that the current interrupt is not from IOA
> > + */
> > + if (!dev_id) {
> > + printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
> > + return IRQ_NONE;
> > + }
> > +
> > + hrrq_vector = (struct pmcraid_isr_param *)dev_id;
> > + pinstance = hrrq_vector->drv_inst;
> > +
> > + /* Acquire the lock (currently host_lock) while processing interrupts.
> > + * This interval is small as most of the response processing is done by
> > + * tasklet without the lock.
> > + */
> > + spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
> > + intrs = pmcraid_read_interrupts(pinstance);
> > +
> > + if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0)) {
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > + return IRQ_NONE;
> > + }
> > +
> > + /* Any error interrupts including unit_check, initiate IOA reset.
> > + * In case of unit check indicate to reset_sequence that IOA unit
> > + * checked and prepare for a dump during reset sequence
> > + */
> > + if (intrs & PMCRAID_ERROR_INTERRUPTS) {
> > +
> > + if (intrs & INTRS_IOA_UNIT_CHECK)
> > + pinstance->ioa_unit_check = 1;
> > +
> > + iowrite32(intrs,
> > + pinstance->int_regs.ioa_host_interrupt_clr_reg);
> > + pmcraid_err("ISR: error interrupts: %x initiating reset\n",
> > + intrs);
> > + intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
> > + pmcraid_initiate_reset(pinstance);
> > + } else {
> > + pmcraid_isr_common(pinstance, intrs, hrrq_vector->hrrq_id);
> > + }
> > +
> > + spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
> > +
> > + return IRQ_HANDLED;
> > +}
> > +
> > +
> > +/**
> > + * pmcraid_worker_function - worker thread function
> > + *
> > + * @workp: pointer to struct work queue
> > + *
> > + * Return Value
> > + * None
> > + */
> > +
> > +static void pmcraid_worker_function(struct work_struct *workp)
> > +{
> > + struct pmcraid_instance *pinstance;
> > + struct pmcraid_resource_entry *res;
> > + struct pmcraid_resource_entry *temp;
> > + struct scsi_device *sdev;
> > + unsigned long lock_flags;
> > + unsigned long host_lock_flags;
> > + u8 bus, target, lun;
> > +
> > + pinstance = container_of(workp, struct pmcraid_instance, worker_q);
> > + /* add resources only after host is added into system */
> > + if (!atomic_read(&pinstance->expose_resources))
> > + return;
> > +
> > + spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
> > + list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
> > +
> > + if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
> > + sdev = res->scsi_dev;
> > +
> > + /* host_lock must be held before calling
> > + * scsi_device_get
> > + */
> > + spin_lock_irqsave(pinstance->host->host_lock,
> > + host_lock_flags);
> > + if (!scsi_device_get(sdev)) {
> > + spin_unlock_irqrestore(
> > + pinstance->host->host_lock,
> > + host_lock_flags);
> > + pmcraid_info("deleting %x from midlayer\n",
> > + res->cfg_entry.resource_address);
> > + list_move_tail(&res->queue,
> > + &pinstance->free_res_q);
> > + spin_unlock_irqrestore(
> > + &pinstance->resource_lock,
> > + lock_flags);
> > + scsi_remove_device(sdev);
> > + scsi_device_put(sdev);
> > + spin_lock_irqsave(&pinstance->resource_lock,
> > + lock_flags);
> > + res->change_detected = 0;
> > + } else {
> > + spin_unlock_irqrestore(
> > + pinstance->host->host_lock,
> > + host_lock_flags);
> > + }
> > + }
> > + }
> > +
> > + list_for_each_entry(res, &pinstance->used_res_q, queue) {
> > +
> > + if (res->change_detected == RES_CHANGE_ADD) {
> > +
> > + if (!pmcraid_expose_resource(&res->cfg_entry))
> > + continue;
> > +
> > + if (RES_IS_VSET(res->cfg_entry)) {
> > + bus = PMCRAID_VSET_BUS_ID;
> > + target = res->cfg_entry.unique_flags1;
> > + lun = PMCRAID_VSET_LUN_ID;
> > + } else {
> > + bus = PMCRAID_PHYS_BUS_ID;
> > + target =
> > + RES_TARGET(
> > + res->cfg_entry.resource_address);
> > + lun = RES_LUN(res->cfg_entry.resource_address);
> > + }
> > +
> > + res->change_detected = 0;
> > + spin_unlock_irqrestore(&pinstance->resource_lock,
> > + lock_flags);
> > + scsi_add_device(pinstance->host, bus, target, lun);
> > + spin_lock_irqsave(&pinstance->resource_lock,
> > + lock_flags);
> > + }
> > + }
> > +
> > + spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
> > +}
> > +
> > +/**
> > + * pmcraid_tasklet_function - Tasklet function
> > + *
> > + * @instance: pointer to msix param structure
> > + *
> > + * Return Value
> > + * None
> > + */
> > +void pmcraid_tasklet_function(unsigned long instance)
> > +{
> > + struct pmcraid_isr_param *hrrq_vector;
> > + struct pmcraid_instance *pinstance;
> > + unsigned long hrrq_lock_flags;
> > + unsigned long pending_lock_flags;
> > + unsigned long host_lock_flags;
> > + spinlock_t *lockp; /* hrrq buffer lock */
> > + int id;
> > + u32 intrs;
> > + __le32 resp;
> > +
> > + hrrq_vector = (struct pmcraid_isr_param *)instance;
> > + pinstance = hrrq_vector->drv_inst;
> > + id = hrrq_vector->hrrq_id;
> > + lockp = &(pinstance->hrrq_lock[id]);
> > + intrs = pmcraid_read_interrupts(pinstance);
> > +
> > + /* If interrupts was as part of the ioa initialization, clear and mask
> > + * it. Delete the timer and wakeup the reset engine to proceed with
> > + * reset sequence
> > + */
> > + if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
> > + iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
> > + pinstance->int_regs.ioa_host_interrupt_mask_reg);
> > + iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
> > + pinstance->int_regs.ioa_host_interrupt_clr_reg);
> > +
> > + if (pinstance->reset_cmd != NULL) {
> > + del_timer(&pinstance->reset_cmd->timer);
> > + spin_lock_irqsave(pinstance->host->host_lock,
> > + host_lock_flags);
> > + pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + host_lock_flags);
> > + }
> > + return;
> > + }
> > +
> > + /* loop through each of the commands responded by IOA. Each HRRQ buf is
> > + * protected by its own lock. Traversals must be done within this lock
> > + * as there may be multiple tasklets running on multiple CPUs. Note
> > + * that the lock is held just for picking up the response handle and
> > + * manipulating hrrq_curr/toggle_bit values.
> > + */
> > + spin_lock_irqsave(lockp, hrrq_lock_flags);
> > +
> > + resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
> > +
> > + while ((resp & HRRQ_TOGGLE_BIT) ==
> > + pinstance->host_toggle_bit[id]) {
> > +
> > + int cmd_index = resp >> 2;
> > + struct pmcraid_cmd *cmd = NULL;
> > +
> > + if (cmd_index < PMCRAID_MAX_CMD) {
> > + cmd = pinstance->cmd_list[cmd_index];
> > + } else {
> > + /* In case of invalid response handle, initiate IOA
> > + * reset sequence.
> > + */
> > + spin_unlock_irqrestore(lockp, hrrq_lock_flags);
> > +
> > + pmcraid_err("Invalid response %d initiating reset\n",
> > + cmd_index);
> > +
> > + spin_lock_irqsave(pinstance->host->host_lock,
> > + host_lock_flags);
> > + pmcraid_initiate_reset(pinstance);
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + host_lock_flags);
> > +
> > + spin_lock_irqsave(lockp, hrrq_lock_flags);
> > + break;
> > + }
> > +
> > + if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
> > + pinstance->hrrq_curr[id]++;
> > + } else {
> > + pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
> > + pinstance->host_toggle_bit[id] ^= 1u;
> > + }
> > +
> > + spin_unlock_irqrestore(lockp, hrrq_lock_flags);
> > +
> > + spin_lock_irqsave(&pinstance->pending_pool_lock,
> > + pending_lock_flags);
> > + list_del(&cmd->free_list);
> > + spin_unlock_irqrestore(&pinstance->pending_pool_lock,
> > + pending_lock_flags);
> > + del_timer(&cmd->timer);
> > + atomic_dec(&pinstance->outstanding_cmds);
> > +
> > + if (cmd->cmd_done == pmcraid_ioa_reset) {
> > + spin_lock_irqsave(pinstance->host->host_lock,
> > + host_lock_flags);
> > + cmd->cmd_done(cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock,
> > + host_lock_flags);
> > + } else if (cmd->cmd_done != NULL) {
> > + cmd->cmd_done(cmd);
> > + }
> > + /* loop over until we are done with all responses */
> > + spin_lock_irqsave(lockp, hrrq_lock_flags);
> > + resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
> > + }
> > +
> > + spin_unlock_irqrestore(lockp, hrrq_lock_flags);
> > +}
> > +
> > +/**
> > + * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * This routine un-registers registered interrupt handler and
> > + * also frees irqs/vectors.
> > + *
> > + * Retun Value
> > + * None
> > + */
> > +static
> > +void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
> > +{
> > + free_irq(pinstance->pdev->irq, &(pinstance->hrrq_vector[0]));
> > +}
> > +
> > +/**
> > + * pmcraid_register_interrupt_handler - registers interrupt handler
> > + * @pinstance: pointer to per-adapter instance structure
> > + *
> > + * Return Value
> > + * 0 on success, non-zero error code otherwise.
> > + */
> > +static int
> > +pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
> > +{
> > + struct pci_dev *pdev = pinstance->pdev;
> > +
> > + pinstance->hrrq_vector[0].hrrq_id = 0;
> > + pinstance->hrrq_vector[0].drv_inst = pinstance;
> > + pinstance->hrrq_vector[0].vector = 0;
> > + pinstance->num_hrrq = 1;
> > + return request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
> > + PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
> > +}
> > +
> > +/**
> > + * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
> > + * @pinstance: per adapter instance structure pointer
> > + * @max_index: number of buffer blocks to release
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void
> > +pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
> > +{
> > + int i;
> > + for (i = 0; i < max_index; i++) {
> > + kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
> > + pinstance->cmd_list[i] = NULL;
> > + }
> > + kmem_cache_destroy(pinstance->cmd_cachep);
> > + pinstance->cmd_cachep = NULL;
> > +}
> > +
> > +/**
> > + * pmcraid_release_control_blocks - releases buffers alloced for control blocks
> > + * @pinstance: pointer to per adapter instance structure
> > + * @max_index: number of buffers (from 0 onwards) to release
> > + *
> > + * This function assumes that the command blocks for which control blocks are
> > + * linked are not released.
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void
> > +pmcraid_release_control_blocks(
> > + struct pmcraid_instance *pinstance,
> > + int max_index
> > +)
> > +{
> > + int i;
> > +
> > + if (pinstance->control_pool == NULL)
> > + return;
> > +
> > + for (i = 0; i < max_index; i++) {
> > + pci_pool_free(pinstance->control_pool,
> > + pinstance->cmd_list[i]->ioa_cb,
> > + pinstance->cmd_list[i]->ioa_cb_bus_addr);
> > + pinstance->cmd_list[i]->ioa_cb = NULL;
> > + pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
> > + }
> > + pci_pool_destroy(pinstance->control_pool);
> > + pinstance->control_pool = NULL;
> > +}
> > +
> > +/**
> > + * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
> > + * @pinstance - pointer to per adapter instance structure
> > + *
> > + * Allocates memory for command blocks using kernel slab allocator.
> > + *
> > + * Return Value
> > + * 0 in case of success; -ENOMEM in case of failure
> > + */
> > +static int __devinit
> > +pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
> > +{
> > + int i;
> > +
> > + sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
> > + pinstance->host->unique_id);
> > +
> > +
> > + pinstance->cmd_cachep = kmem_cache_create(
> > + pinstance->cmd_pool_name,
> > + sizeof(struct pmcraid_cmd), 0,
> > + SLAB_HWCACHE_ALIGN, NULL);
> > + if (!pinstance->cmd_cachep)
> > + return -ENOMEM;
> > +
> > + for (i = 0; i < PMCRAID_MAX_CMD; i++) {
> > + pinstance->cmd_list[i] =
> > + kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
> > + if (!pinstance->cmd_list[i]) {
> > + pmcraid_release_cmd_blocks(pinstance, i);
> > + return -ENOMEM;
> > + }
> > + }
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_allocate_control_blocks - allocates memory control blocks
> > + * @pinstance : pointer to per adapter instance structure
> > + *
> > + * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
> > + * and IOASAs. This is called after command blocks are already allocated.
> > + *
> > + * Return Value
> > + * 0 in case it can allocate all control blocks, otherwise -ENOMEM
> > + */
> > +static int __devinit
> > +pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
> > +{
> > + int i;
> > +
> > + sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
> > + pinstance->host->unique_id);
> > +
> > + pinstance->control_pool =
> > + pci_pool_create(pinstance->ctl_pool_name,
> > + pinstance->pdev,
> > + sizeof(struct pmcraid_control_block),
> > + PMCRAID_IOARCB_ALIGNMENT, 0);
> > +
> > + if (!pinstance->control_pool)
> > + return -ENOMEM;
> > +
> > + for (i = 0; i < PMCRAID_MAX_CMD; i++) {
> > + pinstance->cmd_list[i]->ioa_cb =
> > + pci_pool_alloc(
> > + pinstance->control_pool,
> > + GFP_KERNEL,
> > + &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
> > +
> > + if (!pinstance->cmd_list[i]->ioa_cb) {
> > + pmcraid_release_control_blocks(pinstance, i);
> > + return -ENOMEM;
> > + }
> > + memset(pinstance->cmd_list[i]->ioa_cb, 0,
> > + sizeof(struct pmcraid_control_block));
> > + }
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
> > + * @pinstance: pointer to per adapter instance structure
> > + * @maxindex: size of hrrq buffer pointer array
> > + *
> > + * Return Value
> > + * None
> > + */
> > +static void
> > +pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
> > +{
> > + int i;
> > + for (i = 0; i < maxindex; i++) {
> > +
> > + pci_free_consistent(pinstance->pdev,
> > + HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
> > + pinstance->hrrq_start[i],
> > + pinstance->hrrq_start_bus_addr[i]);
> > +
> > + /* reset pointers and toggle bit to zeros */
> > + pinstance->hrrq_start[i] = NULL;
> > + pinstance->hrrq_start_bus_addr[i] = 0;
> > + pinstance->host_toggle_bit[i] = 0;
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
> > + * @pinstance: pointer to per adapter instance structure
> > + *
> > + * Return value
> > + * 0 hrrq buffers are allocated, -ENOMEM otherwise.
> > + */
> > +static int __devinit
> > +pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
> > +{
> > + int i;
> > + int buf_count = PMCRAID_MAX_CMD / pinstance->num_hrrq;
> > +
> > + for (i = 0; i < pinstance->num_hrrq; i++) {
> > + int buffer_size = HRRQ_ENTRY_SIZE * buf_count;
> > +
> > + pinstance->hrrq_start[i] =
> > + pci_alloc_consistent(
> > + pinstance->pdev,
> > + buffer_size,
> > + &(pinstance->hrrq_start_bus_addr[i]));
> > +
> > + if (pinstance->hrrq_start[i] == 0) {
> > + pmcraid_err("could not allocate host rrq: %d\n", i);
> > + pmcraid_release_host_rrqs(pinstance, i);
> > + return -ENOMEM;
> > + }
> > +
> > + memset(pinstance->hrrq_start[i], 0, buffer_size);
> > + pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
> > + pinstance->hrrq_end[i] =
> > + pinstance->hrrq_start[i] + buf_count - 1;
> > + pinstance->host_toggle_bit[i] = 1;
> > + spin_lock_init(&pinstance->hrrq_lock[i]);
> > + }
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_release_hcams - release HCAM buffers
> > + *
> > + * @pinstance: pointer to per adapter instance structure
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
> > +{
> > + if (pinstance->ccn.msg != NULL) {
> > + pci_free_consistent(pinstance->pdev,
> > + PMCRAID_AEN_HDR_SIZE +
> > + sizeof(struct pmcraid_hcam_ccn),
> > + pinstance->ccn.msg,
> > + pinstance->ccn.baddr);
> > +
> > + pinstance->ccn.msg = NULL;
> > + pinstance->ccn.hcam = NULL;
> > + pinstance->ccn.baddr = 0;
> > + }
> > +
> > + if (pinstance->ldn.msg != NULL) {
> > + pci_free_consistent(pinstance->pdev,
> > + PMCRAID_AEN_HDR_SIZE +
> > + sizeof(struct pmcraid_hcam_ldn),
> > + pinstance->ldn.msg,
> > + pinstance->ldn.baddr);
> > +
> > + pinstance->ldn.msg = NULL;
> > + pinstance->ldn.hcam = NULL;
> > + pinstance->ldn.baddr = 0;
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_allocate_hcams - allocates HCAM buffers
> > + * @pinstance : pointer to per adapter instance structure
> > + *
> > + * Return Value:
> > + * 0 in case of successful allocation, non-zero otherwise
> > + */
> > +static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
> > +{
> > + pinstance->ccn.msg = pci_alloc_consistent(
> > + pinstance->pdev,
> > + PMCRAID_AEN_HDR_SIZE +
> > + sizeof(struct pmcraid_hcam_ccn),
> > + &(pinstance->ccn.baddr));
> > +
> > + pinstance->ldn.msg = pci_alloc_consistent(
> > + pinstance->pdev,
> > + PMCRAID_AEN_HDR_SIZE +
> > + sizeof(struct pmcraid_hcam_ldn),
> > + &(pinstance->ldn.baddr));
> > +
> > + if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
> > + pmcraid_release_hcams(pinstance);
> > + } else {
> > + pinstance->ccn.hcam =
> > + (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
> > + pinstance->ldn.hcam =
> > + (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
> > +
> > + atomic_set(&pinstance->ccn.ignore, 0);
> > + atomic_set(&pinstance->ldn.ignore, 0);
> > + }
> > +
> > + return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
> > +}
> > +
> > +/**
> > + * pmcraid_release_config_buffers - release config.table buffers
> > + * @pinstance: pointer to per adapter instance structure
> > + *
> > + * Return Value
> > + * none
> > + */
> > +static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
> > +{
> > + if (pinstance->cfg_table != NULL &&
> > + pinstance->cfg_table_bus_addr != 0) {
> > + pci_free_consistent(pinstance->pdev,
> > + sizeof(struct pmcraid_config_table),
> > + pinstance->cfg_table,
> > + pinstance->cfg_table_bus_addr);
> > + pinstance->cfg_table = NULL;
> > + pinstance->cfg_table_bus_addr = 0;
> > + }
> > +
> > + if (pinstance->res_entries != NULL) {
> > + int i;
> > +
> > + for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
> > + list_del(&pinstance->res_entries[i].queue);
> > + kfree(pinstance->res_entries);
> > + pinstance->res_entries = NULL;
> > + }
> > +
> > + pmcraid_release_hcams(pinstance);
> > +}
> > +
> > +/**
> > + * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
> > + * @pinstance : pointer to per adapter instance structure
> > + *
> > + * Return Value
> > + * 0 for successful allocation, -ENOMEM for any failure
> > + */
> > +static int __devinit
> > +pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
> > +{
> > + int i;
> > +
> > + pinstance->res_entries =
> > + kzalloc(sizeof(struct pmcraid_resource_entry) *
> > + PMCRAID_MAX_RESOURCES, GFP_KERNEL);
> > +
> > + if (NULL == pinstance->res_entries) {
> > + pmcraid_err("failed to allocate memory for resource table\n");
> > + return -ENOMEM;
> > + }
> > +
> > + for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
> > + list_add_tail(&pinstance->res_entries[i].queue,
> > + &pinstance->free_res_q);
> > +
> > + pinstance->cfg_table =
> > + pci_alloc_consistent(pinstance->pdev,
> > + sizeof(struct pmcraid_config_table),
> > + &pinstance->cfg_table_bus_addr);
> > +
> > + if (NULL == pinstance->cfg_table) {
> > + pmcraid_err("couldn't alloc DMA memory for config table\n");
> > + pmcraid_release_config_buffers(pinstance);
> > + return -ENOMEM;
> > + }
> > +
> > + if (pmcraid_allocate_hcams(pinstance)) {
> > + pmcraid_err("could not alloc DMA memory for HCAMS\n");
> > + pmcraid_release_config_buffers(pinstance);
> > + return -ENOMEM;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_init_tasklets - registers tasklets for response handling
> > + *
> > + * @pinstance: pointer adapter instance structure
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
> > +{
> > + int i;
> > + for (i = 0; i < pinstance->num_hrrq; i++)
> > + tasklet_init(&pinstance->isr_tasklet[i],
> > + pmcraid_tasklet_function,
> > + (unsigned long)&pinstance->hrrq_vector[i]);
> > +}
> > +
> > +/**
> > + * pmcraid_kill_tasklets - destroys tasklets registered for response handling
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
> > +{
> > + int i;
> > + for (i = 0; i < pinstance->num_hrrq; i++)
> > + tasklet_kill(&pinstance->isr_tasklet[i]);
> > +}
> > +
> > +/**
> > + * pmcraid_init_buffers - allocates memory and initializes various structures
> > + * @pinstance: pointer to per adapter instance structure
> > + *
> > + * This routine pre-allocates memory based on the type of block as below:
> > + * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
> > + * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
> > + * config-table entries : DMAable memory using pci_alloc_consistent
> > + * HostRRQs : DMAable memory, using pci_alloc_consistent
> > + *
> > + * Return Value
> > + * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
> > + */
> > +static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
> > +{
> > + int i;
> > +
> > + if (pmcraid_allocate_host_rrqs(pinstance)) {
> > + pmcraid_err("couldn't allocate memory for %d host rrqs\n",
> > + pinstance->num_hrrq);
> > + return -ENOMEM;
> > + }
> > +
> > + if (pmcraid_allocate_config_buffers(pinstance)) {
> > + pmcraid_err("couldn't allocate memory for config buffers\n");
> > + pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
> > + return -ENOMEM;
> > + }
> > +
> > + if (pmcraid_allocate_cmd_blocks(pinstance)) {
> > + pmcraid_err("couldn't allocate memory for cmd blocks \n");
> > + pmcraid_release_config_buffers(pinstance);
> > + pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
> > + return -ENOMEM;
> > + }
> > +
> > + if (pmcraid_allocate_control_blocks(pinstance)) {
> > + pmcraid_err("couldn't allocate memory control blocks \n");
> > + pmcraid_release_config_buffers(pinstance);
> > + pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
> > + pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
> > + return -ENOMEM;
> > + }
> > +
> > + /* Initialize all the command blocks and add them to free pool. No
> > + * need to lock (free_pool_lock) as this is done in initialization
> > + * itself
> > + */
> > + for (i = 0; i < PMCRAID_MAX_CMD; i++) {
> > + struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
> > + pmcraid_init_cmdblk(cmdp, i);
> > + cmdp->drv_inst = pinstance;
> > + list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_reinit_buffers - resets various buffer pointers
> > + * @pinstance: pointer to adapter instance
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
> > +{
> > + int i;
> > + int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
> > +
> > + for (i = 0; i < pinstance->num_hrrq; i++) {
> > + memset(pinstance->hrrq_start[i], 0, buffer_size);
> > + pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
> > + pinstance->hrrq_end[i] =
> > + pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
> > + pinstance->host_toggle_bit[i] = 1;
> > + }
> > +}
> > +
> > +/**
> > + * pmcraid_init_instance - initialize per instance data structure
> > + * @pdev: pointer to pci device structure
> > + * @host: pointer to Scsi_Host structure
> > + * @mapped_pci_addr: memory mapped IOA configuration registers
> > + *
> > + * Return Value
> > + * 0 on success, non-zero in case of any failure
> > + */
> > +static int __devinit pmcraid_init_instance(
> > + struct pci_dev *pdev,
> > + struct Scsi_Host *host,
> > + void __iomem *mapped_pci_addr
> > +)
> > +{
> > + struct pmcraid_instance *pinstance =
> > + (struct pmcraid_instance *)host->hostdata;
> > +
> > + pinstance->host = host;
> > + pinstance->pdev = pdev;
> > +
> > + /* Initialize register addresses */
> > + pinstance->mapped_dma_addr = mapped_pci_addr;
> > +
> > + /* Initialize chip-specific details */
> > + {
> > + struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
> > + struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
> > +
> > + pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
> > +
> > + pint_regs->ioa_host_interrupt_reg =
> > + mapped_pci_addr + chip_cfg->ioa_host_intr;
> > + pint_regs->ioa_host_interrupt_clr_reg =
> > + mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
> > + pint_regs->host_ioa_interrupt_reg =
> > + mapped_pci_addr + chip_cfg->host_ioa_intr;
> > + pint_regs->host_ioa_interrupt_clr_reg =
> > + mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
> > +
> > + /* Current version of firmware exposes interrupt mask set
> > + * and mask clr registers through memory mapped bar0.
> > + */
> > + pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
> > + pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
> > + pint_regs->ioa_host_interrupt_mask_reg =
> > + mapped_pci_addr + chip_cfg->ioa_host_mask;
> > + pint_regs->ioa_host_interrupt_mask_clr_reg =
> > + mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
> > + pint_regs->global_interrupt_mask_reg =
> > + mapped_pci_addr + chip_cfg->global_intr_mask;
> > + };
> > +
> > + pinstance->ioa_reset_attempts = 0;
> > + init_waitqueue_head(&pinstance->reset_wait_q);
> > +
> > + atomic_set(&pinstance->outstanding_cmds, 0);
> > + atomic_set(&pinstance->expose_resources, 0);
> > +
> > + INIT_LIST_HEAD(&pinstance->free_res_q);
> > + INIT_LIST_HEAD(&pinstance->used_res_q);
> > + INIT_LIST_HEAD(&pinstance->free_cmd_pool);
> > + INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
> > +
> > + spin_lock_init(&pinstance->free_pool_lock);
> > + spin_lock_init(&pinstance->pending_pool_lock);
> > + spin_lock_init(&pinstance->resource_lock);
> > + mutex_init(&pinstance->aen_queue_lock);
> > +
> > + /* Work-queue (Shared) for deferred processing error handling */
> > + INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
> > +
> > + /* Initialize the default log_level */
> > + pinstance->current_log_level = pmcraid_log_level;
> > +
> > + /* Setup variables required for reset engine */
> > + pinstance->ioa_state = IOA_STATE_UNKNOWN;
> > + pinstance->reset_cmd = NULL;
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_release_buffers - release per-adapter buffers allocated
> > + *
> > + * @pinstance: pointer to adapter soft state
> > + *
> > + * Return Value
> > + * none
> > + */
> > +static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
> > +{
> > + pmcraid_release_config_buffers(pinstance);
> > + pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
> > + pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
> > + pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
> > +
> > +}
> > +
> > +/**
> > + * pmcraid_shutdown - shutdown adapter controller.
> > + * @pdev: pci device struct
> > + *
> > + * Issues an adapter shutdown to the card waits for its completion
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_shutdown(struct pci_dev *pdev)
> > +{
> > + struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
> > + pmcraid_reset_bringdown(pinstance);
> > +}
> > +
> > +
> > +/**
> > + * pmcraid_get_minor - returns unused minor number from minor number bitmap
> > + */
> > +static unsigned short pmcraid_get_minor(void)
> > +{
> > + int minor;
> > +
> > + minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
> > + __set_bit(minor, pmcraid_minor);
> > + return minor;
> > +}
> > +
> > +/**
> > + * pmcraid_release_minor - releases given minor back to minor number bitmap
> > + */
> > +static void pmcraid_release_minor(unsigned short minor)
> > +{
> > + __clear_bit(minor, pmcraid_minor);
> > +}
> > +
> > +/**
> > + * pmcraid_setup_chrdev - allocates a minor number and registers a char device
> > + *
> > + * @pinstance: pointer to adapter instance for which to register device
> > + *
> > + * Return value
> > + * 0 in case of success, otherwise non-zero
> > + */
> > +static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
> > +{
> > + int minor;
> > + int error;
> > +
> > + minor = pmcraid_get_minor();
> > + cdev_init(&pinstance->cdev, &pmcraid_fops);
> > + pinstance->cdev.owner = THIS_MODULE;
> > +
> > + error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
> > +
> > + if (error)
> > + pmcraid_release_minor(minor);
> > + else
> > + device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
> > + NULL, "pmcsas%u", minor);
> > + return error;
> > +}
> > +
> > +/**
> > + * pmcraid_release_chrdev - unregisters per-adapter management interface
> > + *
> > + * @pinstance: pointer to adapter instance structure
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
> > +{
> > + pmcraid_release_minor(MINOR(pinstance->cdev.dev));
> > + device_destroy(pmcraid_class,
> > + MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
> > + cdev_del(&pinstance->cdev);
> > +}
> > +
> > +/**
> > + * pmcraid_remove - IOA hot plug remove entry point
> > + * @pdev: pci device struct
> > + *
> > + * Return value
> > + * none
> > + */
> > +static void __devexit pmcraid_remove(struct pci_dev *pdev)
> > +{
> > + struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
> > +
> > + /* remove the management interface (/dev file) for this device */
> > + pmcraid_release_chrdev(pinstance);
> > +
> > + /* remove host template from scsi midlayer */
> > + scsi_remove_host(pinstance->host);
> > +
> > + /* block requests from mid-layer */
> > + scsi_block_requests(pinstance->host);
> > +
> > + /* initiate shutdown adapter */
> > + pmcraid_shutdown(pdev);
> > +
> > + pmcraid_disable_interrupts(pinstance, ~0);
> > + flush_scheduled_work();
> > +
> > + pmcraid_kill_tasklets(pinstance);
> > + pmcraid_unregister_interrupt_handler(pinstance);
> > + pmcraid_release_buffers(pinstance);
> > + iounmap(pinstance->mapped_dma_addr);
> > + pci_release_regions(pdev);
> > + scsi_host_put(pinstance->host);
> > + pci_disable_device(pdev);
> > +
> > + return;
> > +}
> > +
> > +#ifdef CONFIG_PM
> > +/**
> > + * pmcraid_suspend - driver suspend entry point for power management
> > + * @pdev: PCI device structure
> > + * @state: PCI power state to suspend routine
> > + *
> > + * Return Value - 0 always
> > + */
> > +static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
> > +{
> > + struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
> > +
> > + pmcraid_shutdown(pdev);
> > + pmcraid_disable_interrupts(pinstance, ~0);
> > + pmcraid_kill_tasklets(pinstance);
> > + pci_set_drvdata(pinstance->pdev, pinstance);
> > + pmcraid_unregister_interrupt_handler(pinstance);
> > + pci_save_state(pdev);
> > + pci_disable_device(pdev);
> > + pci_set_power_state(pdev, pci_choose_state(pdev, state));
> > +
> > + return 0;
> > +}
> > +
> > +/**
> > + * pmcraid_resume - driver resume entry point PCI power management
> > + * @pdev: PCI device structure
> > + *
> > + * Return Value - 0 in case of success. Error code in case of any failure
> > + */
> > +static int pmcraid_resume(struct pci_dev *pdev)
> > +{
> > + struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
> > + struct Scsi_Host *host = pinstance->host;
> > + int rc;
> > + int hrrqs;
> > +
> > + pci_set_power_state(pdev, PCI_D0);
> > + pci_enable_wake(pdev, PCI_D0, 0);
> > + pci_restore_state(pdev);
> > +
> > + rc = pci_enable_device(pdev);
> > +
> > + if (rc) {
> > + pmcraid_err("pmcraid: Enable device failed\n");
> > + return rc;
> > + }
> > +
> > + pci_set_master(pdev);
> > +
> > + if ((sizeof(dma_addr_t) == 4) ||
> > + pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
> > + rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
> > +
> > + if (rc == 0)
> > + rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
> > +
> > + if (rc != 0) {
> > + dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
> > + goto disable_device;
> > + }
> > +
> > + atomic_set(&pinstance->outstanding_cmds, 0);
> > + hrrqs = pinstance->num_hrrq;
> > + rc = pmcraid_register_interrupt_handler(pinstance);
> > +
> > + if (rc) {
> > + pmcraid_err("resume: couldn't register interrupt handlers\n");
> > + rc = -ENODEV;
> > + goto release_host;
> > + }
> > +
> > + pmcraid_init_tasklets(pinstance);
> > + pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
> > +
> > + /* Start with hard reset sequence which brings up IOA to operational
> > + * state as well as completes the reset sequence.
> > + */
> > + pinstance->ioa_hard_reset = 1;
> > +
> > + /* Start IOA firmware initialization and bring card to Operational
> > + * state.
> > + */
> > + if (pmcraid_reset_bringup(pinstance)) {
> > + pmcraid_err("couldn't initialize IOA \n");
> > + rc = -ENODEV;
> > + goto release_tasklets;
> > + }
> > +
> > + return 0;
> > +
> > +release_tasklets:
> > + pmcraid_kill_tasklets(pinstance);
> > + pmcraid_unregister_interrupt_handler(pinstance);
> > +
> > +release_host:
> > + scsi_host_put(host);
> > +
> > +disable_device:
> > + pci_disable_device(pdev);
> > +
> > + return rc;
> > +}
> > +
> > +#else
> > +
> > +#define pmcraid_suspend NULL
> > +#define pmcraid_resume NULL
> > +
> > +#endif /* CONFIG_PM */
> > +
> > +/**
> > + * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
> > + * completion of the ioa reset
> > + * @cmd: pointer to reset command block
> > + */
> > +static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + unsigned long flags;
> > +
> > + spin_lock_irqsave(pinstance->host->host_lock, flags);
> > + pmcraid_ioa_reset(cmd);
> > + spin_unlock_irqrestore(pinstance->host->host_lock, flags);
> > + scsi_unblock_requests(pinstance->host);
> > + schedule_work(&pinstance->worker_q);
> > +}
> > +
> > +/**
> > + * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
> > + *
> > + * @cmd: pointer to pmcraid_cmd structure
> > + *
> > + * Return Value
> > + * 0 for success or non-zero for failure cases
> > + */
> > +static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
> > + void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
> > +
> > + pmcraid_reinit_cmdblk(cmd);
> > +
> > + ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
> > + ioarcb->request_type = REQ_TYPE_IOACMD;
> > + ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
> > + ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
> > +
> > + /* If this was called as part of resource table reinitialization due to
> > + * lost CCN, it is enough to return the command block back to free pool
> > + * as part of set_supported_devs completion function.
> > + */
> > + if (cmd->drv_inst->reinit_cfg_table) {
> > + cmd->drv_inst->reinit_cfg_table = 0;
> > + cmd->release = 1;
> > + cmd_done = pmcraid_reinit_cfgtable_done;
> > + }
> > +
> > + /* we will be done with the reset sequence after set supported devices,
> > + * setup the done function to return the command block back to free
> > + * pool
> > + */
> > + pmcraid_send_cmd(cmd,
> > + cmd_done,
> > + PMCRAID_SET_SUP_DEV_TIMEOUT,
> > + pmcraid_timeout_handler);
> > + return;
> > +}
> > +
> > +/**
> > + * pmcraid_init_res_table - Initialize the resource table
> > + * @cmd: pointer to pmcraid command struct
> > + *
> > + * This function looks through the existing resource table, comparing
> > + * it with the config table. This function will take care of old/new
> > + * devices and schedule adding/removing them from the mid-layer
> > + * as appropriate.
> > + *
> > + * Return value
> > + * None
> > + */
> > +static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + struct pmcraid_resource_entry *res, *temp;
> > + struct pmcraid_config_table_entry *cfgte;
> > + unsigned long lock_flags;
> > + int found, rc, i;
> > + LIST_HEAD(old_res);
> > +
> > + if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
> > + dev_err(&pinstance->pdev->dev, "Require microcode download\n");
> > +
> > + /* resource list is protected by pinstance->resource_lock.
> > + * init_res_table can be called from probe (user-thread) or runtime
> > + * reset (timer/tasklet)
> > + */
> > + spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
> > +
> > + list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
> > + list_move_tail(&res->queue, &old_res);
> > +
> > + for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
> > + cfgte = &pinstance->cfg_table->entries[i];
> > +
> > + if (!pmcraid_expose_resource(cfgte))
> > + continue;
> > +
> > + found = 0;
> > +
> > + /* If this entry was already detected and initialized */
> > + list_for_each_entry_safe(res, temp, &old_res, queue) {
> > +
> > + rc = memcmp(&res->cfg_entry.resource_address,
> > + &cfgte->resource_address,
> > + sizeof(cfgte->resource_address));
> > + if (!rc) {
> > + list_move_tail(&res->queue,
> > + &pinstance->used_res_q);
> > + found = 1;
> > + break;
> > + }
> > + }
> > +
> > + /* If this is new entry, initialize it and add it the queue */
> > + if (!found) {
> > +
> > + if (list_empty(&pinstance->free_res_q)) {
> > + dev_err(&pinstance->pdev->dev,
> > + "Too many devices attached\n");
> > + break;
> > + }
> > +
> > + found = 1;
> > + res = list_entry(pinstance->free_res_q.next,
> > + struct pmcraid_resource_entry, queue);
> > +
> > + res->scsi_dev = NULL;
> > + res->change_detected = RES_CHANGE_ADD;
> > + res->reset_progress = 0;
> > + list_move_tail(&res->queue, &pinstance->used_res_q);
> > + }
> > +
> > + /* copy new configuration table entry details into driver
> > + * maintained resource entry
> > + */
> > + if (found) {
> > + memcpy(&res->cfg_entry, cfgte,
> > + sizeof(struct pmcraid_config_table_entry));
> > + pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
> > + res->cfg_entry.resource_type,
> > + res->cfg_entry.unique_flags1,
> > + le32_to_cpu(res->cfg_entry.resource_address));
> > + }
> > + }
> > +
> > + /* Detect any deleted entries, mark them for deletion from mid-layer */
> > + list_for_each_entry_safe(res, temp, &old_res, queue) {
> > +
> > + if (res->scsi_dev) {
> > + res->change_detected = RES_CHANGE_DEL;
> > + res->cfg_entry.resource_handle =
> > + PMCRAID_INVALID_RES_HANDLE;
> > + list_move_tail(&res->queue, &pinstance->used_res_q);
> > + } else {
> > + list_move_tail(&res->queue, &pinstance->free_res_q);
> > + }
> > + }
> > +
> > + /* release the resource list lock */
> > + spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
> > + pmcraid_set_supported_devs(cmd);
> > +}
> > +
> > +/**
> > + * pmcraid_querycfg - Send a Query IOA Config to the adapter.
> > + * @cmd: pointer pmcraid_cmd struct
> > + *
> > + * This function sends a Query IOA Configuration command to the adapter to
> > + * retrieve the IOA configuration table.
> > + *
> > + * Return value:
> > + * none
> > + */
> > +static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
> > +{
> > + struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
> > + struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
> > + struct pmcraid_instance *pinstance = cmd->drv_inst;
> > + int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
> > +
> > + ioarcb->request_type = REQ_TYPE_IOACMD;
> > + ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
> > +
> > + ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
> > +
> > + /* firmware requires 4-byte length field, specified in B.E format */
> > + memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
> > +
> > + /* Since entire config table can be described by single IOADL, it can
> > + * be part of IOARCB itself
> > + */
> > + ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
> > + offsetof(struct pmcraid_ioarcb,
> > + add_data.u.ioadl[0]));
> > + ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
> > + ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
> > +
> > + ioarcb->request_flags0 |= NO_LINK_DESCS;
> > + ioarcb->data_transfer_length =
> > + cpu_to_le32(sizeof(struct pmcraid_config_table));
> > +
> > + ioadl = &(ioarcb->add_data.u.ioadl[0]);
> > + ioadl->flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC);
> > + ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
> > + ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
> > +
> > + pmcraid_send_cmd(cmd, pmcraid_init_res_table,
> > + PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
> > +}
> > +
> > +
> > +/**
> > + * pmcraid_probe - PCI probe entry pointer for PMC MaxRaid controller driver
> > + * @pdev: pointer to pci device structure
> > + * @dev_id: pointer to device ids structure
> > + *
> > + * Return Value
> > + * returns 0 if the device is claimed and successfully configured.
> > + * returns non-zero error code in case of any failure
> > + */
> > +static int __devinit pmcraid_probe(
> > + struct pci_dev *pdev,
> > + const struct pci_device_id *dev_id
> > +)
> > +{
> > + struct pmcraid_instance *pinstance;
> > + struct Scsi_Host *host;
> > + void __iomem *mapped_pci_addr;
> > + int rc = PCIBIOS_SUCCESSFUL;
> > +
> > + if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
> > + pmcraid_err
> > + ("maximum number(%d) of supported adapters reached\n",
> > + atomic_read(&pmcraid_adapter_count));
> > + return -ENOMEM;
> > + }
> > +
> > + atomic_inc(&pmcraid_adapter_count);
> > + rc = pci_enable_device(pdev);
> > +
> > + if (rc) {
> > + dev_err(&pdev->dev, "Cannot enable adapter\n");
> > + atomic_dec(&pmcraid_adapter_count);
> > + return rc;
> > + }
> > +
> > + dev_info(&pdev->dev,
> > + "Found new IOA(%x:%x), Total IOA count: %d\n",
> > + pdev->vendor, pdev->device,
> > + atomic_read(&pmcraid_adapter_count));
> > +
> > + rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
> > +
> > + if (rc < 0) {
> > + dev_err(&pdev->dev,
> > + "Couldn't register memory range of registers\n");
> > + goto out_disable_device;
> > + }
> > +
> > + mapped_pci_addr = pci_iomap(pdev, 0, 0);
> > +
> > + if (!mapped_pci_addr) {
> > + dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
> > + rc = -ENOMEM;
> > + goto out_release_regions;
> > + }
> > +
> > + pci_set_master(pdev);
> > +
> > + /* Firmware requires the system bus address of IOARCB to be within
> > + * 32-bit addressable range though it has 64-bit IOARRIN register.
> > + * However, firmware supports 64-bit streaming DMA buffers, whereas
> > + * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
> > + * returns memory within 4GB (if not, change this logic), coherent
> > + * buffers are within firmware acceptible address ranges.
> > + */
> > + if ((sizeof(dma_addr_t) == 4) ||
> > + pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
> > + rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
> > +
> > + /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
> > + * bit mask for pci_alloc_consistent to return addresses within 4GB
> > + */
> > + if (rc == 0)
> > + rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
> > +
> > + if (rc != 0) {
> > + dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
> > + goto cleanup_nomem;
> > + }
> > +
> > + host = scsi_host_alloc(&pmcraid_host_template,
> > + sizeof(struct pmcraid_instance));
> > +
> > + if (!host) {
> > + dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
> > + rc = -ENOMEM;
> > + goto cleanup_nomem;
> > + }
> > +
> > + host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
> > + host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
> > + host->unique_id = host->host_no;
> > + host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
> > + host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
> > +
> > + /* zero out entire instance structure */
> > + pinstance = (struct pmcraid_instance *)host->hostdata;
> > + memset(pinstance, 0, sizeof(*pinstance));
> > +
> > + pinstance->chip_cfg =
> > + (struct pmcraid_chip_details *)(dev_id->driver_data);
> > +
> > + rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
> > +
> > + if (rc < 0) {
> > + dev_err(&pdev->dev, "failed to initialize adapter instance\n");
> > + goto out_scsi_host_put;
> > + }
> > +
> > + pci_set_drvdata(pdev, pinstance);
> > +
> > + /* Save PCI config-space for use following the reset */
> > + rc = pci_save_state(pinstance->pdev);
> > +
> > + if (rc != 0) {
> > + dev_err(&pdev->dev, "Failed to save PCI config space\n");
> > + goto out_scsi_host_put;
> > + }
> > +
> > + pmcraid_disable_interrupts(pinstance, ~0);
> > +
> > + rc = pmcraid_register_interrupt_handler(pinstance);
> > +
> > + if (rc) {
> > + pmcraid_err("couldn't register interrupt handler\n");
> > + goto out_scsi_host_put;
> > + }
> > +
> > + pmcraid_init_tasklets(pinstance);
> > +
> > + /* allocate verious buffers used by LLD.*/
> > + rc = pmcraid_init_buffers(pinstance);
> > +
> > + if (rc) {
> > + pmcraid_err("couldn't allocate memory blocks\n");
> > + goto out_unregister_isr;
> > + }
> > +
> > + /* check the reset type required */
> > + pmcraid_reset_type(pinstance);
> > +
> > + pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
> > +
> > + /* Start IOA firmware initialization and bring card to Operational
> > + * state.
> > + */
> > + pmcraid_info("starting IOA initialization sequence\n");
> > + if (pmcraid_reset_bringup(pinstance)) {
> > + pmcraid_err("couldn't initialize IOA \n");
> > + rc = 1;
> > + goto out_release_bufs;
> > + }
> > +
> > + /* Add adapter instance into mid-layer list */
> > + rc = scsi_add_host(pinstance->host, &pdev->dev);
> > + if (rc != 0) {
> > + pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
> > + goto out_release_bufs;
> > + }
> > +
> > + scsi_scan_host(pinstance->host);
> > +
> > + rc = pmcraid_setup_chrdev(pinstance);
> > +
> > + if (rc != 0) {
> > + pmcraid_err("couldn't create mgmt interface, error: %x\n",
> > + rc);
> > + goto out_remove_host;
> > + }
> > +
> > + /* Schedule worker thread to handle CCN and take care of adding and
> > + * removing devices to OS
> > + */
> > + atomic_set(&pinstance->expose_resources, 1);
> > + schedule_work(&pinstance->worker_q);
> > + return rc;
> > +
> > +out_remove_host:
> > + scsi_remove_host(host);
> > +
> > +out_release_bufs:
> > + pmcraid_release_buffers(pinstance);
> > +
> > +out_unregister_isr:
> > + pmcraid_kill_tasklets(pinstance);
> > + pmcraid_unregister_interrupt_handler(pinstance);
> > +
> > +out_scsi_host_put:
> > + scsi_host_put(host);
> > +
> > +cleanup_nomem:
> > + iounmap(mapped_pci_addr);
> > +
> > +out_release_regions:
> > + pci_release_regions(pdev);
> > +
> > +out_disable_device:
> > + atomic_dec(&pmcraid_adapter_count);
> > + pci_set_drvdata(pdev, NULL);
> > + pci_disable_device(pdev);
> > + return -ENODEV;
> > +}
> > +
> > +/*
> > + * PCI driver structure of pcmraid driver
> > + */
> > +static struct pci_driver pmcraid_driver = {
> > + .name = PMCRAID_DRIVER_NAME,
> > + .id_table = pmcraid_pci_table,
> > + .probe = pmcraid_probe,
> > + .remove = pmcraid_remove,
> > + .suspend = pmcraid_suspend,
> > + .resume = pmcraid_resume,
> > + .shutdown = pmcraid_shutdown
> > +};
> > +
> > +
> > +/**
> > + * pmcraid_init - module load entry point
> > + */
> > +static int __init pmcraid_init(void)
> > +{
> > + dev_t dev;
> > + int error;
> > +
> > + pmcraid_info("%s Device Driver version: %s %s\n",
> > + PMCRAID_DRIVER_NAME,
> > + PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
> > +
> > + error = alloc_chrdev_region(&dev, 0,
> > + PMCRAID_MAX_ADAPTERS,
> > + PMCRAID_DEVFILE);
> > +
> > + if (error) {
> > + pmcraid_err("failed to get a major number for adapters\n");
> > + goto out_init;
> > + }
> > +
> > + pmcraid_major = MAJOR(dev);
> > + pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
> > +
> > + if (IS_ERR(pmcraid_class)) {
> > + error = PTR_ERR(pmcraid_class);
> > + pmcraid_err("failed to register with with sysfs, error = %x\n",
> > + error);
> > + goto out_unreg_chrdev;
> > + }
> > +
> > +
> > + error = pmcraid_netlink_init();
> > +
> > + if (error)
> > + goto out_unreg_chrdev;
> > +
> > + error = pci_register_driver(&pmcraid_driver);
> > +
> > + if (error == 0)
> > + goto out_init;
> > +
> > + pmcraid_err("failed to register pmcraid driver, error = %x\n",
> > + error);
> > + class_destroy(pmcraid_class);
> > + pmcraid_netlink_release();
> > +
> > +out_unreg_chrdev:
> > + unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
> > +out_init:
> > + return error;
> > +}
> > +
> > +/**
> > + * pmcraid_exit - module unload entry point
> > + */
> > +static void __exit pmcraid_exit(void)
> > +{
> > + pmcraid_netlink_release();
> > + class_destroy(pmcraid_class);
> > + unregister_chrdev_region(MKDEV(pmcraid_major, 0),
> > + PMCRAID_MAX_ADAPTERS);
> > + pci_unregister_driver(&pmcraid_driver);
> > +}
> > +
> > +module_init(pmcraid_init);
> > +module_exit(pmcraid_exit);
> > diff -urN -x scsi-misc-2.6/Documentation/dontdiff scsi-misc-2.6.orig/drivers/scsi/pmcraid.h scsi-misc-2.6/drivers/scsi/pmcraid.h
> > --- scsi-misc-2.6.orig/drivers/scsi/pmcraid.h 1969-12-31 16:00:00.000000000 -0800
> > +++ scsi-misc-2.6/drivers/scsi/pmcraid.h 2009-08-25 12:34:24.000000000 -0700
> > @@ -0,0 +1,1029 @@
> > +/*
> > + * pmcraid.h -- PMC Sierra MaxRAID controller driver header file
> > + *
> > + * Copyright (C) 2008, 2009 PMC Sierra Inc.
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation; either version 2 of the License, or
> > + * (at your option) any later version.
> > + *
> > + * This program is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> > + * GNU General Public License for more details.
> > + *
> > + * You should have received a copy of the GNU General Public License
> > + * along with this program; if not, write to the Free Software
> > + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> > + */
> > +
> > +#ifndef _PMCRAID_H
> > +#define _PMCRAID_H
> > +
> > +#include <linux/version.h>
> > +#include <linux/types.h>
> > +#include <linux/completion.h>
> > +#include <linux/list.h>
> > +#include <scsi/scsi.h>
> > +#include <linux/kref.h>
> > +#include <scsi/scsi_cmnd.h>
> > +#include <linux/cdev.h>
> > +#include <net/netlink.h>
> > +#include <net/genetlink.h>
> > +#include <linux/connector.h>
> > +/*
> > + * Driver name : string representing the driver name
> > + * Device file : /dev file to be used for management interfaces
> > + * Driver version: version string in major_version.minor_version.patch format
> > + * Driver date : date information in "Mon dd yyyy" format
> > + */
> > +#define PMCRAID_DRIVER_NAME "PMC MaxRAID"
> > +#define PMCRAID_DEVFILE "pmcsas"
> > +#define PMCRAID_DRIVER_VERSION "1.0.2"
> > +#define PMCRAID_DRIVER_DATE __DATE__
> > +
> > +/* Maximum number of adapters supported by current version of the driver */
> > +#define PMCRAID_MAX_ADAPTERS 1024
> > +
> > +/* Bit definitions as per firmware, bit position [0][1][2].....[31] */
> > +#define PMC_BIT8(n) (1 << (7-n))
> > +#define PMC_BIT16(n) (1 << (15-n))
> > +#define PMC_BIT32(n) (1 << (31-n))
> > +
> > +/* PMC PCI vendor ID and device ID values */
> > +#define PCI_VENDOR_ID_PMC 0x11F8
> > +#define PCI_DEVICE_ID_PMC_MAXRAID 0x5220
> > +
> > +/*
> > + * MAX_CMD : maximum commands that can be outstanding with IOA
> > + * MAX_IO_CMD : command blocks available for IO commands
> > + * MAX_HCAM_CMD : command blocks avaibale for HCAMS
> > + * MAX_INTERNAL_CMD : command blocks avaible for internal commands like reset
> > + */
> > +#define PMCRAID_MAX_CMD 1024
> > +#define PMCRAID_MAX_IO_CMD 1020
> > +#define PMCRAID_MAX_HCAM_CMD 2
> > +#define PMCRAID_MAX_INTERNAL_CMD 2
> > +
> > +/* MAX_IOADLS : max number of scatter-gather lists supported by IOA
> > + * IOADLS_INTERNAL : number of ioadls included as part of IOARCB.
> > + * IOADLS_EXTERNAL : number of ioadls allocated external to IOARCB
> > + */
> > +#define PMCRAID_IOADLS_INTERNAL 27
> > +#define PMCRAID_IOADLS_EXTERNAL 37
> > +#define PMCRAID_MAX_IOADLS PMCRAID_IOADLS_INTERNAL
> > +
> > +/* HRRQ_ENTRY_SIZE : size of hrrq buffer
> > + * IOARCB_ALIGNMENT : alignment required for IOARCB
> > + * IOADL_ALIGNMENT : alignment requirement for IOADLs
> > + * MSIX_VECTORS : number of MSIX vectors supported
> > + */
> > +#define HRRQ_ENTRY_SIZE sizeof(__le32)
> > +#define PMCRAID_IOARCB_ALIGNMENT 32
> > +#define PMCRAID_IOADL_ALIGNMENT 16
> > +#define PMCRAID_IOASA_ALIGNMENT 4
> > +#define PMCRAID_NUM_MSIX_VECTORS 1
> > +
> > +/* various other limits */
> > +#define PMCRAID_VENDOR_ID_LEN 8
> > +#define PMCRAID_PRODUCT_ID_LEN 16
> > +#define PMCRAID_SERIAL_NUM_LEN 8
> > +#define PMCRAID_LUN_LEN 8
> > +#define PMCRAID_MAX_CDB_LEN 16
> > +#define PMCRAID_DEVICE_ID_LEN 8
> > +#define PMCRAID_SENSE_DATA_LEN 256
> > +#define PMCRAID_ADD_CMD_PARAM_LEN 48
> > +
> > +#define PMCRAID_MAX_BUS_TO_SCAN 1
> > +#define PMCRAID_MAX_NUM_TARGETS_PER_BUS 256
> > +#define PMCRAID_MAX_NUM_LUNS_PER_TARGET 8
> > +
> > +/* IOA bus/target/lun number of IOA resources */
> > +#define PMCRAID_IOA_BUS_ID 0xfe
> > +#define PMCRAID_IOA_TARGET_ID 0xff
> > +#define PMCRAID_IOA_LUN_ID 0xff
> > +#define PMCRAID_VSET_BUS_ID 0x1
> > +#define PMCRAID_VSET_LUN_ID 0x0
> > +#define PMCRAID_PHYS_BUS_ID 0x0
> > +#define PMCRAID_VIRTUAL_ENCL_BUS_ID 0x8
> > +#define PMCRAID_MAX_VSET_TARGETS 240
> > +#define PMCRAID_MAX_VSET_LUNS_PER_TARGET 8
> > +
> > +#define PMCRAID_IOA_MAX_SECTORS 32767
> > +#define PMCRAID_VSET_MAX_SECTORS 512
> > +#define PMCRAID_MAX_CMD_PER_LUN 254
> > +
> > +/* Number of configuration table entries (resources) */
> > +#define PMCRAID_MAX_NUM_OF_VSETS 240
> > +
> > +/* Todo : Check max limit for Phase 1 */
> > +#define PMCRAID_MAX_NUM_OF_PHY_DEVS 256
> > +
> > +/* MAX_NUM_OF_DEVS includes 1 FP, 1 Dummy Enclosure device */
> > +#define PMCRAID_MAX_NUM_OF_DEVS \
> > + (PMCRAID_MAX_NUM_OF_VSETS + PMCRAID_MAX_NUM_OF_PHY_DEVS + 2)
> > +
> > +#define PMCRAID_MAX_RESOURCES PMCRAID_MAX_NUM_OF_DEVS
> > +
> > +/* Adapter Commands used by driver */
> > +#define PMCRAID_QUERY_RESOURCE_STATE 0xC2
> > +#define PMCRAID_RESET_DEVICE 0xC3
> > +/* options to select reset target */
> > +#define ENABLE_RESET_MODIFIER 0x80
> > +#define RESET_DEVICE_LUN 0x40
> > +#define RESET_DEVICE_TARGET 0x20
> > +#define RESET_DEVICE_BUS 0x10
> > +
> > +#define PMCRAID_IDENTIFY_HRRQ 0xC4
> > +#define PMCRAID_QUERY_IOA_CONFIG 0xC5
> > +#define PMCRAID_QUERY_CMD_STATUS 0xCB
> > +#define PMCRAID_ABORT_CMD 0xC7
> > +
> > +/* CANCEL ALL command, provides option for setting SYNC_COMPLETE
> > + * on the target resources for which commands got cancelled
> > + */
> > +#define PMCRAID_CANCEL_ALL_REQUESTS 0xCE
> > +#define PMCRAID_SYNC_COMPLETE_AFTER_CANCEL PMC_BIT8(0)
> > +
> > +/* HCAM command and types of HCAM supported by IOA */
> > +#define PMCRAID_HOST_CONTROLLED_ASYNC 0xCF
> > +#define PMCRAID_HCAM_CODE_CONFIG_CHANGE 0x01
> > +#define PMCRAID_HCAM_CODE_LOG_DATA 0x02
> > +
> > +/* IOA shutdown command and various shutdown types */
> > +#define PMCRAID_IOA_SHUTDOWN 0xF7
> > +#define PMCRAID_SHUTDOWN_NORMAL 0x00
> > +#define PMCRAID_SHUTDOWN_PREPARE_FOR_NORMAL 0x40
> > +#define PMCRAID_SHUTDOWN_NONE 0x100
> > +#define PMCRAID_SHUTDOWN_ABBREV 0x80
> > +
> > +/* SET SUPPORTED DEVICES command and the option to select all the
> > + * devices to be supported
> > + */
> > +#define PMCRAID_SET_SUPPORTED_DEVICES 0xFB
> > +#define ALL_DEVICES_SUPPORTED PMC_BIT8(0)
> > +
> > +/* This option is used with SCSI WRITE_BUFFER command */
> > +#define PMCRAID_WR_BUF_DOWNLOAD_AND_SAVE 0x05
> > +
> > +/* IOASC Codes used by driver */
> > +#define PMCRAID_IOASC_SENSE_MASK 0xFFFFFF00
> > +#define PMCRAID_IOASC_SENSE_KEY(ioasc) ((ioasc) >> 24)
> > +#define PMCRAID_IOASC_SENSE_CODE(ioasc) (((ioasc) & 0x00ff0000) >> 16)
> > +#define PMCRAID_IOASC_SENSE_QUAL(ioasc) (((ioasc) & 0x0000ff00) >> 8)
> > +#define PMCRAID_IOASC_SENSE_STATUS(ioasc) ((ioasc) & 0x000000ff)
> > +
> > +#define PMCRAID_IOASC_GOOD_COMPLETION 0x00000000
> > +#define PMCRAID_IOASC_NR_INIT_CMD_REQUIRED 0x02040200
> > +#define PMCRAID_IOASC_NR_IOA_RESET_REQUIRED 0x02048000
> > +#define PMCRAID_IOASC_NR_SYNC_REQUIRED 0x023F0000
> > +#define PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC 0x03110C00
> > +#define PMCRAID_IOASC_HW_CANNOT_COMMUNICATE 0x04050000
> > +#define PMCRAID_IOASC_HW_DEVICE_TIMEOUT 0x04080100
> > +#define PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR 0x04448500
> > +#define PMCRAID_IOASC_HW_IOA_RESET_REQUIRED 0x04448600
> > +#define PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE 0x05250000
> > +#define PMCRAID_IOASC_AC_TERMINATED_BY_HOST 0x0B5A0000
> > +#define PMCRAID_IOASC_UA_BUS_WAS_RESET 0x06290000
> > +#define PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER 0x06298000
> > +
> > +/* Driver defined IOASCs */
> > +#define PMCRAID_IOASC_IOA_WAS_RESET 0x10000001
> > +#define PMCRAID_IOASC_PCI_ACCESS_ERROR 0x10000002
> > +
> > +/* Various timeout values (in milliseconds) used. If any of these are chip
> > + * specific, move them to pmcraid_chip_details structure.
> > + */
> > +#define PMCRAID_PCI_DEASSERT_TIMEOUT 2000
> > +#define PMCRAID_BIST_TIMEOUT 2000
> > +#define PMCRAID_AENWAIT_TIMEOUT 5000
> > +#define PMCRAID_TRANSOP_TIMEOUT 60000
> > +
> > +#define PMCRAID_RESET_TIMEOUT (2 * HZ)
> > +#define PMCRAID_CHECK_FOR_RESET_TIMEOUT ((HZ / 10))
> > +#define PMCRAID_VSET_IO_TIMEOUT (60 * HZ)
> > +#define PMCRAID_INTERNAL_TIMEOUT (60 * HZ)
> > +#define PMCRAID_SHUTDOWN_TIMEOUT (150 * HZ)
> > +#define PMCRAID_RESET_BUS_TIMEOUT (60 * HZ)
> > +#define PMCRAID_RESET_HOST_TIMEOUT (150 * HZ)
> > +#define PMCRAID_REQUEST_SENSE_TIMEOUT (30 * HZ)
> > +#define PMCRAID_SET_SUP_DEV_TIMEOUT (2 * 60 * HZ)
> > +
> > +/* structure to represent a scatter-gather element (IOADL descriptor) */
> > +struct pmcraid_ioadl_desc {
> > + __le64 address;
> > + __le32 data_len;
> > + __u8 reserved[3];
> > + __u8 flags;
> > +} __attribute__((packed, aligned(PMCRAID_IOADL_ALIGNMENT)));
> > +
> > +/* pmcraid_ioadl_desc.flags values */
> > +#define IOADL_FLAGS_CHAINED PMC_BIT8(0)
> > +#define IOADL_FLAGS_LAST_DESC PMC_BIT8(1)
> > +#define IOADL_FLAGS_READ_LAST PMC_BIT8(1)
> > +#define IOADL_FLAGS_WRITE_LAST PMC_BIT8(1)
> > +
> > +
> > +/* additional IOARCB data which can be CDB or additional request parameters
> > + * or list of IOADLs. Firmware supports max of 512 bytes for IOARCB, hence then
> > + * number of IOADLs are limted to 27. In case they are more than 27, they will
> > + * be used in chained form
> > + */
> > +struct pmcraid_ioarcb_add_data {
> > + union {
> > + struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_INTERNAL];
> > + __u8 add_cmd_params[PMCRAID_ADD_CMD_PARAM_LEN];
> > + } u;
> > +};
> > +
> > +/*
> > + * IOA Request Control Block
> > + */
> > +struct pmcraid_ioarcb {
> > + __le64 ioarcb_bus_addr;
> > + __le32 resource_handle;
> > + __le32 response_handle;
> > + __le64 ioadl_bus_addr;
> > + __le32 ioadl_length;
> > + __le32 data_transfer_length;
> > + __le64 ioasa_bus_addr;
> > + __le16 ioasa_len;
> > + __le16 cmd_timeout;
> > + __le16 add_cmd_param_offset;
> > + __le16 add_cmd_param_length;
> > + __le32 reserved1[2];
> > + __le32 reserved2;
> > + __u8 request_type;
> > + __u8 request_flags0;
> > + __u8 request_flags1;
> > + __u8 hrrq_id;
> > + __u8 cdb[PMCRAID_MAX_CDB_LEN];
> > + struct pmcraid_ioarcb_add_data add_data;
> > +} __attribute__((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
> > +
> > +/* well known resource handle values */
> > +#define PMCRAID_IOA_RES_HANDLE 0xffffffff
> > +#define PMCRAID_INVALID_RES_HANDLE 0
> > +
> > +/* pmcraid_ioarcb.request_type values */
> > +#define REQ_TYPE_SCSI 0x00
> > +#define REQ_TYPE_IOACMD 0x01
> > +#define REQ_TYPE_HCAM 0x02
> > +
> > +/* pmcraid_ioarcb.flags0 values */
> > +#define TRANSFER_DIR_WRITE PMC_BIT8(0)
> > +#define INHIBIT_UL_CHECK PMC_BIT8(2)
> > +#define SYNC_OVERRIDE PMC_BIT8(3)
> > +#define SYNC_COMPLETE PMC_BIT8(4)
> > +#define NO_LINK_DESCS PMC_BIT8(5)
> > +
> > +/* pmcraid_ioarcb.flags1 values */
> > +#define DELAY_AFTER_RESET PMC_BIT8(0)
> > +#define TASK_TAG_SIMPLE 0x10
> > +#define TASK_TAG_ORDERED 0x20
> > +#define TASK_TAG_QUEUE_HEAD 0x30
> > +
> > +/* toggle bit offset in response handle */
> > +#define HRRQ_TOGGLE_BIT 0x01
> > +#define HRRQ_RESPONSE_BIT 0x02
> > +
> > +/* IOA Status Area */
> > +struct pmcraid_ioasa_vset {
> > + __le32 failing_lba_hi;
> > + __le32 failing_lba_lo;
> > + __le32 reserved;
> > +} __attribute__((packed, aligned(4)));
> > +
> > +struct pmcraid_ioasa {
> > + __le32 ioasc;
> > + __le16 returned_status_length;
> > + __le16 available_status_length;
> > + __le32 residual_data_length;
> > + __le32 ilid;
> > + __le32 fd_ioasc;
> > + __le32 fd_res_address;
> > + __le32 fd_res_handle;
> > + __le32 reserved;
> > +
> > + /* resource specific sense information */
> > + union {
> > + struct pmcraid_ioasa_vset vset;
> > + } u;
> > +
> > + /* IOA autosense data */
> > + __le16 auto_sense_length;
> > + __le16 error_data_length;
> > + __u8 sense_data[PMCRAID_SENSE_DATA_LEN];
> > +} __attribute__((packed, aligned(4)));
> > +
> > +#define PMCRAID_DRIVER_ILID 0xffffffff
> > +
> > +/* Config Table Entry per Resource */
> > +struct pmcraid_config_table_entry {
> > + __u8 resource_type;
> > + __u8 bus_protocol;
> > + __le16 array_id;
> > + __u8 common_flags0;
> > + __u8 common_flags1;
> > + __u8 unique_flags0;
> > + __u8 unique_flags1; /*also used as vset target_id */
> > + __le32 resource_handle;
> > + __le32 resource_address;
> > + __u8 device_id[PMCRAID_DEVICE_ID_LEN];
> > + __u8 lun[PMCRAID_LUN_LEN];
> > +} __attribute__((packed, aligned(4)));
> > +
> > +/* resource types (config_table_entry.resource_type values) */
> > +#define RES_TYPE_AF_DASD 0x00
> > +#define RES_TYPE_GSCSI 0x01
> > +#define RES_TYPE_VSET 0x02
> > +#define RES_TYPE_IOA_FP 0xFF
> > +
> > +#define RES_IS_IOA(res) ((res).resource_type == RES_TYPE_IOA_FP)
> > +#define RES_IS_GSCSI(res) ((res).resource_type == RES_TYPE_GSCSI)
> > +#define RES_IS_VSET(res) ((res).resource_type == RES_TYPE_VSET)
> > +#define RES_IS_AFDASD(res) ((res).resource_type == RES_TYPE_AF_DASD)
> > +
> > +/* bus_protocol values used by driver */
> > +#define RES_TYPE_VENCLOSURE 0x8
> > +
> > +/* config_table_entry.common_flags0 */
> > +#define MULTIPATH_RESOURCE PMC_BIT32(0)
> > +
> > +/* unique_flags1 */
> > +#define IMPORT_MODE_MANUAL PMC_BIT8(0)
> > +
> > +/* well known resource handle values */
> > +#define RES_HANDLE_IOA 0xFFFFFFFF
> > +#define RES_HANDLE_NONE 0x00000000
> > +
> > +/* well known resource address values */
> > +#define RES_ADDRESS_IOAFP 0xFEFFFFFF
> > +#define RES_ADDRESS_INVALID 0xFFFFFFFF
> > +
> > +/* BUS/TARGET/LUN values from resource_addrr */
> > +#define RES_BUS(res_addr) (le32_to_cpu(res_addr) & 0xFF)
> > +#define RES_TARGET(res_addr) ((le32_to_cpu(res_addr) >> 16) & 0xFF)
> > +#define RES_LUN(res_addr) 0x0
> > +
> > +/* configuration table structure */
> > +struct pmcraid_config_table {
> > + __le16 num_entries;
> > + __u8 table_format;
> > + __u8 reserved1;
> > + __u8 flags;
> > + __u8 reserved2[11];
> > + struct pmcraid_config_table_entry entries[PMCRAID_MAX_RESOURCES];
> > +} __attribute__((packed, aligned(4)));
> > +
> > +/* config_table.flags value */
> > +#define MICROCODE_UPDATE_REQUIRED PMC_BIT32(0)
> > +
> > +/*
> > + * HCAM format
> > + */
> > +#define PMCRAID_HOSTRCB_LDNSIZE 4056
> > +
> > +/* Error log notification format */
> > +struct pmcraid_hostrcb_error {
> > + __le32 fd_ioasc;
> > + __le32 fd_ra;
> > + __le32 fd_rh;
> > + __le32 prc;
> > + union {
> > + __u8 data[PMCRAID_HOSTRCB_LDNSIZE];
> > + } u;
> > +} __attribute__ ((packed, aligned(4)));
> > +
> > +struct pmcraid_hcam_hdr {
> > + __u8 op_code;
> > + __u8 notification_type;
> > + __u8 notification_lost;
> > + __u8 flags;
> > + __u8 overlay_id;
> > + __u8 reserved1[3];
> > + __le32 ilid;
> > + __le32 timestamp1;
> > + __le32 timestamp2;
> > + __le32 data_len;
> > +} __attribute__((packed, aligned(4)));
> > +
> > +#define PMCRAID_AEN_GROUP 0x3
> > +
> > +struct pmcraid_hcam_ccn {
> > + struct pmcraid_hcam_hdr header;
> > + struct pmcraid_config_table_entry cfg_entry;
> > +} __attribute__((packed, aligned(4)));
> > +
> > +struct pmcraid_hcam_ldn {
> > + struct pmcraid_hcam_hdr header;
> > + struct pmcraid_hostrcb_error error_log;
> > +} __attribute__((packed, aligned(4)));
> > +
> > +/* pmcraid_hcam.op_code values */
> > +#define HOSTRCB_TYPE_CCN 0xE1
> > +#define HOSTRCB_TYPE_LDN 0xE2
> > +
> > +/* pmcraid_hcam.notification_type values */
> > +#define NOTIFICATION_TYPE_ENTRY_CHANGED 0x0
> > +#define NOTIFICATION_TYPE_ENTRY_NEW 0x1
> > +#define NOTIFICATION_TYPE_ENTRY_DELETED 0x2
> > +#define NOTIFICATION_TYPE_ERROR_LOG 0x10
> > +#define NOTIFICATION_TYPE_INFORMATION_LOG 0x11
> > +
> > +#define HOSTRCB_NOTIFICATIONS_LOST PMC_BIT8(0)
> > +
> > +/* pmcraid_hcam.flags values */
> > +#define HOSTRCB_INTERNAL_OP_ERROR PMC_BIT8(0)
> > +#define HOSTRCB_ERROR_RESPONSE_SENT PMC_BIT8(1)
> > +
> > +/* pmcraid_hcam.overlay_id values */
> > +#define HOSTRCB_OVERLAY_ID_08 0x08
> > +#define HOSTRCB_OVERLAY_ID_09 0x09
> > +#define HOSTRCB_OVERLAY_ID_11 0x11
> > +#define HOSTRCB_OVERLAY_ID_12 0x12
> > +#define HOSTRCB_OVERLAY_ID_13 0x13
> > +#define HOSTRCB_OVERLAY_ID_14 0x14
> > +#define HOSTRCB_OVERLAY_ID_16 0x16
> > +#define HOSTRCB_OVERLAY_ID_17 0x17
> > +#define HOSTRCB_OVERLAY_ID_20 0x20
> > +#define HOSTRCB_OVERLAY_ID_FF 0xFF
> > +
> > +/* Implementation specific card details */
> > +struct pmcraid_chip_details {
> > + /* hardware register offsets */
> > + unsigned long ioastatus;
> > + unsigned long ioarrin;
> > + unsigned long mailbox;
> > + unsigned long global_intr_mask;
> > + unsigned long ioa_host_intr;
> > + unsigned long ioa_host_intr_clr;
> > + unsigned long ioa_host_mask;
> > + unsigned long ioa_host_mask_clr;
> > + unsigned long host_ioa_intr;
> > + unsigned long host_ioa_intr_clr;
> > +
> > + /* timeout used during transitional to operational state */
> > + unsigned long transop_timeout;
> > +};
> > +
> > +/* IOA to HOST doorbells (interrupts) */
> > +#define INTRS_TRANSITION_TO_OPERATIONAL PMC_BIT32(0)
> > +#define INTRS_IOARCB_TRANSFER_FAILED PMC_BIT32(3)
> > +#define INTRS_IOA_UNIT_CHECK PMC_BIT32(4)
> > +#define INTRS_NO_HRRQ_FOR_CMD_RESPONSE PMC_BIT32(5)
> > +#define INTRS_CRITICAL_OP_IN_PROGRESS PMC_BIT32(6)
> > +#define INTRS_IO_DEBUG_ACK PMC_BIT32(7)
> > +#define INTRS_IOARRIN_LOST PMC_BIT32(27)
> > +#define INTRS_SYSTEM_BUS_MMIO_ERROR PMC_BIT32(28)
> > +#define INTRS_IOA_PROCESSOR_ERROR PMC_BIT32(29)
> > +#define INTRS_HRRQ_VALID PMC_BIT32(30)
> > +#define INTRS_OPERATIONAL_STATUS PMC_BIT32(0)
> > +
> > +/* Host to IOA Doorbells */
> > +#define DOORBELL_RUNTIME_RESET PMC_BIT32(1)
> > +#define DOORBELL_IOA_RESET_ALERT PMC_BIT32(7)
> > +#define DOORBELL_IOA_DEBUG_ALERT PMC_BIT32(9)
> > +#define DOORBELL_ENABLE_DESTRUCTIVE_DIAGS PMC_BIT32(8)
> > +#define DOORBELL_IOA_START_BIST PMC_BIT32(23)
> > +#define DOORBELL_RESET_IOA PMC_BIT32(31)
> > +
> > +/* Global interrupt mask register value */
> > +#define GLOBAL_INTERRUPT_MASK 0x4ULL
> > +
> > +#define PMCRAID_ERROR_INTERRUPTS (INTRS_IOARCB_TRANSFER_FAILED | \
> > + INTRS_IOA_UNIT_CHECK | \
> > + INTRS_NO_HRRQ_FOR_CMD_RESPONSE | \
> > + INTRS_IOARRIN_LOST | \
> > + INTRS_SYSTEM_BUS_MMIO_ERROR | \
> > + INTRS_IOA_PROCESSOR_ERROR)
> > +
> > +#define PMCRAID_PCI_INTERRUPTS (PMCRAID_ERROR_INTERRUPTS | \
> > + INTRS_HRRQ_VALID | \
> > + INTRS_CRITICAL_OP_IN_PROGRESS |\
> > + INTRS_TRANSITION_TO_OPERATIONAL)
> > +
> > +/* control_block, associated with each of the commands contains IOARCB, IOADLs
> > + * memory for IOASA. Additional 3 * 16 bytes are allocated in order to support
> > + * additional request parameters (of max size 48) any command.
> > + */
> > +struct pmcraid_control_block {
> > + struct pmcraid_ioarcb ioarcb;
> > + struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_EXTERNAL + 3];
> > + struct pmcraid_ioasa ioasa;
> > +} __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
> > +
> > +/* pmcraid_sglist - Scatter-gather list allocated for passthrough ioctls
> > + */
> > +struct pmcraid_sglist {
> > + u32 order;
> > + u32 num_sg;
> > + u32 num_dma_sg;
> > + u32 buffer_len;
> > + struct scatterlist scatterlist[1];
> > +};
> > +
> > +/* pmcraid_cmd - LLD representation of SCSI command */
> > +struct pmcraid_cmd {
> > +
> > + /* Ptr and bus address of DMA.able control block for this command */
> > + struct pmcraid_control_block *ioa_cb;
> > + dma_addr_t ioa_cb_bus_addr;
> > +
> > + /* sense buffer for REQUEST SENSE command if firmware is not sending
> > + * auto sense data
> > + */
> > + dma_addr_t sense_buffer_dma;
> > + dma_addr_t dma_handle;
> > + u8 *sense_buffer;
> > +
> > + /* pointer to mid layer structure of SCSI commands */
> > + struct scsi_cmnd *scsi_cmd;
> > +
> > + struct list_head free_list;
> > + struct completion wait_for_completion;
> > + struct timer_list timer; /* needed for internal commands */
> > + u32 timeout; /* current timeout value */
> > + u32 index; /* index into the command list */
> > + u8 completion_req; /* for handling internal commands */
> > + u8 release; /* for handling completions */
> > +
> > + void (*cmd_done) (struct pmcraid_cmd *);
> > + struct pmcraid_instance *drv_inst;
> > +
> > + struct pmcraid_sglist *sglist; /* used for passthrough IOCTLs */
> > +
> > + /* scratch used during reset sequence */
> > + union {
> > + unsigned long time_left;
> > + struct pmcraid_resource_entry *res;
> > + } u;
> > +};
> > +
> > +/*
> > + * Interrupt registers of IOA
> > + */
> > +struct pmcraid_interrupts {
> > + void __iomem *ioa_host_interrupt_reg;
> > + void __iomem *ioa_host_interrupt_clr_reg;
> > + void __iomem *ioa_host_interrupt_mask_reg;
> > + void __iomem *ioa_host_interrupt_mask_clr_reg;
> > + void __iomem *global_interrupt_mask_reg;
> > + void __iomem *host_ioa_interrupt_reg;
> > + void __iomem *host_ioa_interrupt_clr_reg;
> > +};
> > +
> > +/* ISR parameters LLD allocates (one for each MSI-X if enabled) vectors */
> > +struct pmcraid_isr_param {
> > + u8 hrrq_id; /* hrrq entry index */
> > + u16 vector; /* allocated msi-x vector */
> > + struct pmcraid_instance *drv_inst;
> > +};
> > +
> > +/* AEN message header sent as part of event data to applications */
> > +struct pmcraid_aen_msg {
> > + u32 hostno;
> > + u32 length;
> > + u8 reserved[8];
> > + u8 data[0];
> > +};
> > +
> > +struct pmcraid_hostrcb {
> > + struct pmcraid_instance *drv_inst;
> > + struct pmcraid_aen_msg *msg;
> > + struct pmcraid_hcam_hdr *hcam; /* pointer to hcam buffer */
> > + struct pmcraid_cmd *cmd; /* pointer to command block used */
> > + dma_addr_t baddr; /* system address of hcam buffer */
> > + atomic_t ignore; /* process HCAM response ? */
> > +};
> > +
> > +#define PMCRAID_AEN_HDR_SIZE sizeof(struct pmcraid_aen_msg)
> > +
> > +
> > +
> > +/*
> > + * Per adapter structure maintained by LLD
> > + */
> > +struct pmcraid_instance {
> > + /* Array of allowed-to-be-exposed resources, initialized from
> > + * Configutation Table, later updated with CCNs
> > + */
> > + struct pmcraid_resource_entry *res_entries;
> > +
> > + struct list_head free_res_q; /* res_entries lists for easy lookup */
> > + struct list_head used_res_q; /* List of to be exposed resources */
> > + spinlock_t resource_lock; /* spinlock to protect resource list */
> > +
> > + void __iomem *mapped_dma_addr;
> > + void __iomem *ioa_status; /* Iomapped IOA status register */
> > + void __iomem *mailbox; /* Iomapped mailbox register */
> > + void __iomem *ioarrin; /* IOmapped IOARR IN register */
> > +
> > + struct pmcraid_interrupts int_regs;
> > + struct pmcraid_chip_details *chip_cfg;
> > +
> > + /* HostRCBs needed for HCAM */
> > + struct pmcraid_hostrcb ldn;
> > + struct pmcraid_hostrcb ccn;
> > +
> > +
> > + /* Bus address of start of HRRQ */
> > + dma_addr_t hrrq_start_bus_addr[PMCRAID_NUM_MSIX_VECTORS];
> > +
> > + /* Pointer to 1st entry of HRRQ */
> > + __be32 *hrrq_start[PMCRAID_NUM_MSIX_VECTORS];
> > +
> > + /* Pointer to last entry of HRRQ */
> > + __be32 *hrrq_end[PMCRAID_NUM_MSIX_VECTORS];
> > +
> > + /* Pointer to current pointer of hrrq */
> > + __be32 *hrrq_curr[PMCRAID_NUM_MSIX_VECTORS];
> > +
> > + /* Lock for HRRQ access */
> > + spinlock_t hrrq_lock[PMCRAID_NUM_MSIX_VECTORS];
> > +
> > + /* Expected toggle bit at host */
> > + u8 host_toggle_bit[PMCRAID_NUM_MSIX_VECTORS];
> > +
> > + /* No of Reset IOA retries . IOA marked dead if threshold exceeds */
> > + u8 ioa_reset_attempts;
> > +#define PMCRAID_RESET_ATTEMPTS 3
> > +
> > + /* Wait Q for threads to wait for Reset IOA completion */
> > + wait_queue_head_t reset_wait_q;
> > + struct pmcraid_cmd *reset_cmd;
> > +
> > + /* structures for supporting SIGIO based AEN. */
> > + struct fasync_struct *aen_queue;
> > + struct mutex aen_queue_lock; /* lock for aen subscribers list */
> > + struct cdev cdev;
> > +
> > + struct Scsi_Host *host; /* mid layer interface structure handle */
> > + struct pci_dev *pdev; /* PCI device structure handle */
> > +
> > + u8 current_log_level; /* default level for logging IOASC errors */
> > +
> > + u8 num_hrrq; /* Number of interrupt vectors allocated */
> > + dev_t dev; /* Major-Minor numbers for Char device */
> > +
> > + /* Used as ISR handler argument */
> > + struct pmcraid_isr_param hrrq_vector[PMCRAID_NUM_MSIX_VECTORS];
> > +
> > + /* configuration table */
> > + struct pmcraid_config_table *cfg_table;
> > + dma_addr_t cfg_table_bus_addr;
> > +
> > + /* structures related to command blocks */
> > + struct kmem_cache *cmd_cachep; /* cache for cmd blocks */
> > + struct pci_pool *control_pool; /* pool for control blocks */
> > + char cmd_pool_name[64]; /* name of cmd cache */
> > + char ctl_pool_name[64]; /* name of control cache */
> > +
> > + struct pmcraid_cmd *cmd_list[PMCRAID_MAX_CMD];
> > +
> > + struct list_head free_cmd_pool;
> > + struct list_head pending_cmd_pool;
> > + spinlock_t free_pool_lock; /* free pool lock */
> > + spinlock_t pending_pool_lock; /* pending pool lock */
> > +
> > + /* No of IO commands pending with FW */
> > + atomic_t outstanding_cmds;
> > +
> > + /* should add/delete resources to mid-layer now ?*/
> > + atomic_t expose_resources;
> > +
> > + /* Tasklet to handle deferred processing */
> > + struct tasklet_struct isr_tasklet[PMCRAID_NUM_MSIX_VECTORS];
> > +
> > + /* Work-queue (Shared) for deferred reset processing */
> > + struct work_struct worker_q;
> > +
> > +
> > + u32 ioa_state:4; /* For IOA Reset sequence FSM */
> > +#define IOA_STATE_OPERATIONAL 0x0
> > +#define IOA_STATE_UNKNOWN 0x1
> > +#define IOA_STATE_DEAD 0x2
> > +#define IOA_STATE_IN_SOFT_RESET 0x3
> > +#define IOA_STATE_IN_HARD_RESET 0x4
> > +#define IOA_STATE_IN_RESET_ALERT 0x5
> > +#define IOA_STATE_IN_BRINGDOWN 0x6
> > +#define IOA_STATE_IN_BRINGUP 0x7
> > +
> > + u32 ioa_reset_in_progress:1; /* true if IOA reset is in progress */
> > + u32 ioa_hard_reset:1; /* TRUE if Hard Reset is needed */
> > + u32 ioa_unit_check:1; /* Indicates Unit Check condition */
> > + u32 ioa_bringdown:1; /* whether IOA needs to be brought down */
> > + u32 force_ioa_reset:1; /* force adapter reset ? */
> > + u32 reinit_cfg_table:1; /* reinit config table due to lost CCN */
> > + u32 ioa_shutdown_type:2;/* shutdown type used during reset */
> > +#define SHUTDOWN_NONE 0x0
> > +#define SHUTDOWN_NORMAL 0x1
> > +#define SHUTDOWN_ABBREV 0x2
> > +
> > +};
> > +
> > +/* LLD maintained resource entry structure */
> > +struct pmcraid_resource_entry {
> > + struct list_head queue; /* link to "to be exposed" resources */
> > + struct pmcraid_config_table_entry cfg_entry;
> > + struct scsi_device *scsi_dev; /* Link scsi_device structure */
> > + atomic_t read_failures; /* count of failed READ commands */
> > + atomic_t write_failures; /* count of failed WRITE commands */
> > +
> > + /* To indicate add/delete/modify during CCN */
> > + u8 change_detected;
> > +#define RES_CHANGE_ADD 0x1 /* add this to mid-layer */
> > +#define RES_CHANGE_DEL 0x2 /* remove this from mid-layer */
> > +
> > + u8 reset_progress; /* Device is resetting */
> > +
> > + /*
> > + * When IOA asks for sync (i.e. IOASC = Not Ready, Sync Required), this
> > + * flag will be set, mid layer will be asked to retry. In the next
> > + * attempt, this flag will be checked in queuecommand() to set
> > + * SYNC_COMPLETE flag in IOARCB (flag_0).
> > + */
> > + u8 sync_reqd;
> > +
> > + /* target indicates the mapped target_id assigned to this resource if
> > + * this is VSET resource. For non-VSET resources this will be un-used
> > + * or zero
> > + */
> > + u8 target;
> > +};
> > +
> > +/* Data structures used in IOASC error code logging */
> > +struct pmcraid_ioasc_error {
> > + u32 ioasc_code; /* IOASC code */
> > + u8 log_level; /* default log level assignment. */
> > + char *error_string;
> > +};
> > +
> > +/* Initial log_level assignments for various IOASCs */
> > +#define IOASC_LOG_LEVEL_NONE 0x0 /* no logging */
> > +#define IOASC_LOG_LEVEL_MUST 0x1 /* must log: all high-severity errors */
> > +#define IOASC_LOG_LEVEL_HARD 0x2 /* optional – low severity errors */
> > +
> > +/* Error information maintained by LLD. LLD initializes the pmcraid_error_table
> > + * statically.
> > + */
> > +static struct pmcraid_ioasc_error pmcraid_ioasc_error_table[] = {
> > + {0x01180600, IOASC_LOG_LEVEL_MUST,
> > + "Recovered Error, soft media error, sector reassignment suggested"},
> > + {0x015D0000, IOASC_LOG_LEVEL_MUST,
> > + "Recovered Error, failure prediction thresold exceeded"},
> > + {0x015D9200, IOASC_LOG_LEVEL_MUST,
> > + "Recovered Error, soft Cache Card Battery error thresold"},
> > + {0x015D9200, IOASC_LOG_LEVEL_MUST,
> > + "Recovered Error, soft Cache Card Battery error thresold"},
> > + {0x02048000, IOASC_LOG_LEVEL_MUST,
> > + "Not Ready, IOA Reset Required"},
> > + {0x02408500, IOASC_LOG_LEVEL_MUST,
> > + "Not Ready, IOA microcode download required"},
> > + {0x03110B00, IOASC_LOG_LEVEL_MUST,
> > + "Medium Error, data unreadable, reassignment suggested"},
> > + {0x03110C00, IOASC_LOG_LEVEL_MUST,
> > + "Medium Error, data unreadable do not reassign"},
> > + {0x03310000, IOASC_LOG_LEVEL_MUST,
> > + "Medium Error, media corrupted"},
> > + {0x04050000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, IOA can't communicate with device"},
> > + {0x04080000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, device bus error"},
> > + {0x04080000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, device bus is not functioning"},
> > + {0x04118000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, IOA reserved area data check"},
> > + {0x04118100, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, IOA reserved area invalid data pattern"},
> > + {0x04118200, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, IOA reserved area LRC error"},
> > + {0x04320000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, reassignment space exhausted"},
> > + {0x04330000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, data transfer underlength error"},
> > + {0x04330000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, data transfer overlength error"},
> > + {0x04418000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, PCI bus error"},
> > + {0x04440000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, device error"},
> > + {0x04448300, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, undefined device response"},
> > + {0x04448400, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, IOA microcode error"},
> > + {0x04448600, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, IOA reset required"},
> > + {0x04449200, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, hard Cache Fearuee Card Battery error"},
> > + {0x0444A000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, failed device altered"},
> > + {0x0444A200, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, data check after reassignment"},
> > + {0x0444A300, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, LRC error after reassignment"},
> > + {0x044A0000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, device bus error (msg/cmd phase)"},
> > + {0x04670400, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, new device can't be used"},
> > + {0x04678000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, invalid multiadapter configuration"},
> > + {0x04678100, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, incorrect connection between enclosures"},
> > + {0x04678200, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, connections exceed IOA design limits"},
> > + {0x04678300, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, incorrect multipath connection"},
> > + {0x04679000, IOASC_LOG_LEVEL_MUST,
> > + "Hardware Error, command to LUN failed"},
> > + {0x064C8000, IOASC_LOG_LEVEL_HARD,
> > + "Unit Attention, cache exists for missing/failed device"},
> > + {0x06670100, IOASC_LOG_LEVEL_HARD,
> > + "Unit Attention, incompatible exposed mode device"},
> > + {0x06670600, IOASC_LOG_LEVEL_HARD,
> > + "Unit Attention, attachment of logical unit failed"},
> > + {0x06678000, IOASC_LOG_LEVEL_MUST,
> > + "Unit Attention, cables exceed connective design limit"},
> > + {0x06678300, IOASC_LOG_LEVEL_MUST,
> > + "Unit Attention, incomplete multipath connection between" \
> > + "IOA and enclosure"},
> > + {0x06678400, IOASC_LOG_LEVEL_MUST,
> > + "Unit Attention, incomplete multipath connection between" \
> > + "device and enclosure"},
> > + {0x06678500, IOASC_LOG_LEVEL_MUST,
> > + "Unit Attention, incomplete multipath connection between" \
> > + "IOA and remote IOA"},
> > + {0x06678600, IOASC_LOG_LEVEL_HARD,
> > + "Unit Attention, missing remote IOA"},
> > + {0x06679100, IOASC_LOG_LEVEL_HARD,
> > + "Unit Attention, enclosure doesn't support required multipath" \
> > + "function"},
> > + {0x06698200, IOASC_LOG_LEVEL_HARD,
> > + "Unit Attention, corrupt array parity detected on device"},
> > + {0x066B0200, IOASC_LOG_LEVEL_MUST,
> > + "Unit Attention, array exposed"},
> > + {0x066B8200, IOASC_LOG_LEVEL_HARD,
> > + "Unit Attention, exposed array is still protected"},
> > + {0x066B9200, IOASC_LOG_LEVEL_MUST,
> > + "Unit Attention, Multipath redundancy level got worse"},
> > + {0x07270000, IOASC_LOG_LEVEL_HARD,
> > + "Data Protect, device is read/write protected by IOA"},
> > + {0x07278000, IOASC_LOG_LEVEL_HARD,
> > + "Data Protect, IOA doesn't support device attribute"},
> > + {0x07278100, IOASC_LOG_LEVEL_HARD,
> > + "Data Protect, NVRAM mirroring prohibited"},
> > + {0x07278400, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, array is short 2 or more devices"},
> > + {0x07278600, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, exposed array is short a required device"},
> > + {0x07278700, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, array members not at required addresses"},
> > + {0x07278800, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, exposed mode device resource address conflict"},
> > + {0x07278900, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, incorrect resource address of exposed mode device"},
> > + {0x07278A00, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, Array is missing a device and parity is out of sync"},
> > + {0x07278B00, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, maximum number of arrays already exist"},
> > + {0x07278C00, IOASC_LOG_LEVEL_HARD,
> > + "Data Protect, cannot locate cache data for device"},
> > + {0x07278D00, IOASC_LOG_LEVEL_HARD,
> > + "Data Protect, cache data exits for a changed device"},
> > + {0x07279100, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, detection of a device requiring format"},
> > + {0x07279200, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, IOA exceeds maximum number of devices"},
> > + {0x07279600, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, missing array, volume set is not functional"},
> > + {0x07279700, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, single device for a volume set"},
> > + {0x07279800, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, missing multiple devices for a volume set"},
> > + {0x07279900, IOASC_LOG_LEVEL_HARD,
> > + "Data Protect, maximum number of volument sets already exists"},
> > + {0x07279A00, IOASC_LOG_LEVEL_MUST,
> > + "Data Protect, other volume set problem"},
> > +};
> > +
> > +/* macros to help in debugging */
> > +#define pmcraid_err(...) \
> > + printk(KERN_ERR "MaxRAID: "__VA_ARGS__)
> > +
> > +#define pmcraid_info(...) \
> > + if (pmcraid_debug_log) \
> > + printk(KERN_INFO "MaxRAID: "__VA_ARGS__)
> > +
> > +/* check if given command is a SCSI READ or SCSI WRITE command */
> > +#define SCSI_READ_CMD 0x1 /* any of SCSI READ commands */
> > +#define SCSI_WRITE_CMD 0x2 /* any of SCSI WRITE commands */
> > +#define SCSI_CMD_TYPE(opcode) \
> > +({ u8 op = opcode; u8 __type = 0;\
> > + if (op == READ_6 || op == READ_10 || op == READ_12 || op == READ_16)\
> > + __type = SCSI_READ_CMD;\
> > + else if (op == WRITE_6 || op == WRITE_10 || op == WRITE_12 || \
> > + op == WRITE_16)\
> > + __type = SCSI_WRITE_CMD;\
> > + __type;\
> > +})
> > +
> > +#define IS_SCSI_READ_WRITE(opcode) \
> > +({ u8 __type = SCSI_CMD_TYPE(opcode); \
> > + (__type == SCSI_READ_CMD || __type == SCSI_WRITE_CMD) ? 1 : 0;\
> > +})
> > +
> > +
> > +/*
> > + * pmcraid_ioctl_header - definition of header structure that preceeds all the
> > + * buffers given as ioctl arguements.
> > + *
> > + * .signature : always ASCII string, "PMCRAID"
> > + * .reserved : not used
> > + * .buffer_length : length of the buffer following the header
> > + */
> > +struct pmcraid_ioctl_header {
> > + u8 signature[8];
> > + u32 reserved;
> > + u32 buffer_length;
> > +};
> > +
> > +#define PMCRAID_IOCTL_SIGNATURE "PMCRAID"
> > +
> > +
> > +/*
> > + * pmcraid_event_details - defines AEN details that apps can retrieve from LLD
> > + *
> > + * .rcb_ccn - complete RCB of CCN
> > + * .rcb_ldn - complete RCB of CCN
> > + */
> > +struct pmcraid_event_details {
> > + struct pmcraid_hcam_ccn rcb_ccn;
> > + struct pmcraid_hcam_ldn rcb_ldn;
> > +};
> > +
> > +/*
> > + * pmcraid_driver_ioctl_buffer - structure passed as argument to most of the
> > + * PMC driver handled ioctls.
> > + */
> > +struct pmcraid_driver_ioctl_buffer {
> > + struct pmcraid_ioctl_header ioctl_header;
> > + struct pmcraid_event_details event_details;
> > +};
> > +
> > +/*
> > + * pmcraid_passthrough_ioctl_buffer - structure given as argument to
> > + * passthrough(or firmware handled) IOCTL commands. Note that ioarcb requires
> > + * 32-byte alignment so, it is necessary to pack this structure to avoid any
> > + * holes between ioctl_header and passthrough buffer
> > + *
> > + * .ioactl_header : ioctl header
> > + * .ioarcb : filled-up ioarcb buffer, driver always reads this buffer
> > + * .ioasa : buffer for ioasa, driver fills this with IOASA from firmware
> > + * .request_buffer: The I/O buffer (flat), driver reads/writes to this based on
> > + * the transfer directions passed in ioarcb.flags0. Contents
> > + * of this buffer are valid only when ioarcb.data_transfer_len
> > + * is not zero.
> > + */
> > +struct pmcraid_passthrough_ioctl_buffer {
> > + struct pmcraid_ioctl_header ioctl_header;
> > + struct pmcraid_ioarcb ioarcb;
> > + struct pmcraid_ioasa ioasa;
> > + u8 request_buffer[1];
> > +} __attribute__ ((packed));
> > +
> > +/*
> > + * keys to differentiate between driver handled IOCTLs and passthrough
> > + * IOCTLs passed to IOA. driver determines the ioctl type using macro
> > + * _IOC_TYPE
> > + */
> > +#define PMCRAID_DRIVER_IOCTL 'D'
> > +#define PMCRAID_PASSTHROUGH_IOCTL 'F'
> > +
> > +#define DRV_IOCTL(n, size) \
> > + _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_DRIVER_IOCTL, (n), (size))
> > +
> > +#define FMW_IOCTL(n, size) \
> > + _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_PASSTHROUGH_IOCTL, (n), (size))
> > +
> > +/*
> > + * _ARGSIZE: macro that gives size of the argument type passed to an IOCTL cmd.
> > + * This is to facilitate applications avoiding un-necessary memory allocations.
> > + * For example, most of driver handled ioctls do not require ioarcb, ioasa.
> > + */
> > +#define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))
> > +
> > +/* Driver handled IOCTL command definitions */
> > +
> > +#define PMCRAID_IOCTL_RESET_ADAPTER \
> > + DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))
> > +
> > +/* passthrough/firmware handled commands */
> > +#define PMCRAID_IOCTL_PASSTHROUGH_COMMAND \
> > + FMW_IOCTL(1, sizeof(struct pmcraid_passthrough_ioctl_buffer))
> > +
> > +#define PMCRAID_IOCTL_DOWNLOAD_MICROCODE \
> > + FMW_IOCTL(2, sizeof(struct pmcraid_passthrough_ioctl_buffer))
> > +
> > +
> > +#endif /* _PMCRAID_H */
> > diff -urN -x scsi-misc-2.6/Documentation/dontdiff scsi-misc-2.6.orig/MAINTAINERS scsi-misc-2.6/MAINTAINERS
> > --- scsi-misc-2.6.orig/MAINTAINERS 2009-08-25 12:23:35.000000000 -0700
> > +++ scsi-misc-2.6/MAINTAINERS 2009-08-25 12:31:46.000000000 -0700
> > @@ -3970,6 +3970,14 @@
> > F: drivers/block/pktcdvd.c
> > F: include/linux/pktcdvd.h
> >
> > +PMC SIERRA MaxRAID DRIVER
> > +P: Anil Ravindranath
> > +M: anil_ravindranath@xxxxxxxxxxxxxx
> > +L: linux-scsi@xxxxxxxxxxxxxxx
> > +W: http://www.pmc-sierra.com/
> > +S: Supported
> > +F: drivers/scsi/pmcraid.*
> > +
> > POSIX CLOCKS and TIMERS
> > M: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> > S: Supported
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
> > the body of a message to majordomo@xxxxxxxxxxxxxxx
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
> --
> Brian King
> Linux on Power Virtualization
> IBM Linux Technology Center
>
>
>
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