On 04/15/2014 05:26 AM, Christoph Hellwig wrote: > The IBM virtual SCSI protocol has been obsoleted by ibmvfc, and there > are no reported of the driver left. Both ibmvscsi and ibmvfc are still very much in use on IBM Power hardware. ibmvfc is specific to NPIV configurations, while ibmvscsi can use any supported storage for its backing device, including SAS, FC and others. Additionally, ibmvscsi can also be used in KVM guest VMs on Power as the virtual storage protocol, although it is more for legacy OS support reasons, while the traditional virtio protocols will be the primary storage virtualization used for KVM moving forward on the Power platform. Adding Paul and Nathan to cc here. I'm pretty sure the backend for ibmvscsi in KVM was all done in qemu and there is no dependency on ibmvstgt. Unless there is a use case for KVM, I'm OK with this, as the ibmvstgt driver has never been tested or officially supported by IBM. -Brian > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > --- > MAINTAINERS | 1 - > drivers/scsi/Kconfig | 14 - > drivers/scsi/Makefile | 1 - > drivers/scsi/ibmvscsi/Makefile | 1 - > drivers/scsi/ibmvscsi/ibmvstgt.c | 1001 -------------------------------------- > 5 files changed, 1018 deletions(-) > delete mode 100644 drivers/scsi/ibmvscsi/ibmvstgt.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 6dc67b1..113a50e 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -4381,7 +4381,6 @@ M: Robert Jennings <rcj@xxxxxxxxxxxxxxxxxx> > L: linux-scsi@xxxxxxxxxxxxxxx > S: Supported > F: drivers/scsi/ibmvscsi/ > -X: drivers/scsi/ibmvscsi/ibmvstgt.c > > IBM ServeRAID RAID DRIVER > P: Jack Hammer > diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig > index 02832d6..aba5a6d 100644 > --- a/drivers/scsi/Kconfig > +++ b/drivers/scsi/Kconfig > @@ -848,20 +848,6 @@ config SCSI_IBMVSCSI > To compile this driver as a module, choose M here: the > module will be called ibmvscsi. > > -config SCSI_IBMVSCSIS > - tristate "IBM Virtual SCSI Server support" > - depends on PPC_PSERIES && SCSI_SRP && SCSI_SRP_TGT_ATTRS > - help > - This is the SRP target driver for IBM pSeries virtual environments. > - > - The userspace component needed to initialize the driver and > - documentation can be found: > - > - http://stgt.berlios.de/ > - > - To compile this driver as a module, choose M here: the > - module will be called ibmvstgt. > - > config SCSI_IBMVFC > tristate "IBM Virtual FC support" > depends on PPC_PSERIES && SCSI > diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile > index e172d4f..aacad2f 100644 > --- a/drivers/scsi/Makefile > +++ b/drivers/scsi/Makefile > @@ -129,7 +129,6 @@ obj-$(CONFIG_SCSI_NSP32) += nsp32.o > obj-$(CONFIG_SCSI_IPR) += ipr.o > obj-$(CONFIG_SCSI_SRP) += libsrp.o > obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsi/ > -obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvscsi/ > obj-$(CONFIG_SCSI_IBMVFC) += ibmvscsi/ > obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o > obj-$(CONFIG_SCSI_STEX) += stex.o > diff --git a/drivers/scsi/ibmvscsi/Makefile b/drivers/scsi/ibmvscsi/Makefile > index cb150d1..3840c64 100644 > --- a/drivers/scsi/ibmvscsi/Makefile > +++ b/drivers/scsi/ibmvscsi/Makefile > @@ -1,3 +1,2 @@ > obj-$(CONFIG_SCSI_IBMVSCSI) += ibmvscsi.o > -obj-$(CONFIG_SCSI_IBMVSCSIS) += ibmvstgt.o > obj-$(CONFIG_SCSI_IBMVFC) += ibmvfc.o > diff --git a/drivers/scsi/ibmvscsi/ibmvstgt.c b/drivers/scsi/ibmvscsi/ibmvstgt.c > deleted file mode 100644 > index 56f8a86..0000000 > --- a/drivers/scsi/ibmvscsi/ibmvstgt.c > +++ /dev/null > @@ -1,1001 +0,0 @@ > -/* > - * IBM eServer i/pSeries Virtual SCSI Target Driver > - * Copyright (C) 2003-2005 Dave Boutcher (boutcher@xxxxxxxxxx) IBM Corp. > - * Santiago Leon (santil@xxxxxxxxxx) IBM Corp. > - * Linda Xie (lxie@xxxxxxxxxx) IBM Corp. > - * > - * Copyright (C) 2005-2006 FUJITA Tomonori <tomof@xxxxxxx> > - * > - * 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/interrupt.h> > -#include <linux/module.h> > -#include <linux/slab.h> > -#include <scsi/scsi.h> > -#include <scsi/scsi_host.h> > -#include <scsi/scsi_transport_srp.h> > -#include <scsi/scsi_tgt.h> > -#include <scsi/libsrp.h> > -#include <asm/hvcall.h> > -#include <asm/iommu.h> > -#include <asm/prom.h> > -#include <asm/vio.h> > - > -#include "ibmvscsi.h" > - > -#define INITIAL_SRP_LIMIT 16 > -#define DEFAULT_MAX_SECTORS 256 > - > -#define TGT_NAME "ibmvstgt" > - > -/* > - * Hypervisor calls. > - */ > -#define h_copy_rdma(l, sa, sb, da, db) \ > - plpar_hcall_norets(H_COPY_RDMA, l, sa, sb, da, db) > -#define h_send_crq(ua, l, h) \ > - plpar_hcall_norets(H_SEND_CRQ, ua, l, h) > -#define h_reg_crq(ua, tok, sz)\ > - plpar_hcall_norets(H_REG_CRQ, ua, tok, sz); > -#define h_free_crq(ua) \ > - plpar_hcall_norets(H_FREE_CRQ, ua); > - > -/* tmp - will replace with SCSI logging stuff */ > -#define eprintk(fmt, args...) \ > -do { \ > - printk("%s(%d) " fmt, __func__, __LINE__, ##args); \ > -} while (0) > -/* #define dprintk eprintk */ > -#define dprintk(fmt, args...) > - > -struct vio_port { > - struct vio_dev *dma_dev; > - > - struct crq_queue crq_queue; > - struct work_struct crq_work; > - > - unsigned long liobn; > - unsigned long riobn; > - struct srp_target *target; > - > - struct srp_rport *rport; > -}; > - > -static struct workqueue_struct *vtgtd; > -static struct scsi_transport_template *ibmvstgt_transport_template; > - > -/* > - * These are fixed for the system and come from the Open Firmware device tree. > - * We just store them here to save getting them every time. > - */ > -static char system_id[64] = ""; > -static char partition_name[97] = "UNKNOWN"; > -static unsigned int partition_number = -1; > - > -static struct vio_port *target_to_port(struct srp_target *target) > -{ > - return (struct vio_port *) target->ldata; > -} > - > -static inline union viosrp_iu *vio_iu(struct iu_entry *iue) > -{ > - return (union viosrp_iu *) (iue->sbuf->buf); > -} > - > -static int send_iu(struct iu_entry *iue, uint64_t length, uint8_t format) > -{ > - struct srp_target *target = iue->target; > - struct vio_port *vport = target_to_port(target); > - long rc, rc1; > - union { > - struct viosrp_crq cooked; > - uint64_t raw[2]; > - } crq; > - > - /* First copy the SRP */ > - rc = h_copy_rdma(length, vport->liobn, iue->sbuf->dma, > - vport->riobn, iue->remote_token); > - > - if (rc) > - eprintk("Error %ld transferring data\n", rc); > - > - crq.cooked.valid = 0x80; > - crq.cooked.format = format; > - crq.cooked.reserved = 0x00; > - crq.cooked.timeout = 0x00; > - crq.cooked.IU_length = length; > - crq.cooked.IU_data_ptr = vio_iu(iue)->srp.rsp.tag; > - > - if (rc == 0) > - crq.cooked.status = 0x99; /* Just needs to be non-zero */ > - else > - crq.cooked.status = 0x00; > - > - rc1 = h_send_crq(vport->dma_dev->unit_address, crq.raw[0], crq.raw[1]); > - > - if (rc1) { > - eprintk("%ld sending response\n", rc1); > - return rc1; > - } > - > - return rc; > -} > - > -#define SRP_RSP_SENSE_DATA_LEN 18 > - > -static int send_rsp(struct iu_entry *iue, struct scsi_cmnd *sc, > - unsigned char status, unsigned char asc) > -{ > - union viosrp_iu *iu = vio_iu(iue); > - uint64_t tag = iu->srp.rsp.tag; > - > - /* If the linked bit is on and status is good */ > - if (test_bit(V_LINKED, &iue->flags) && (status == NO_SENSE)) > - status = 0x10; > - > - memset(iu, 0, sizeof(struct srp_rsp)); > - iu->srp.rsp.opcode = SRP_RSP; > - iu->srp.rsp.req_lim_delta = 1; > - iu->srp.rsp.tag = tag; > - > - if (test_bit(V_DIOVER, &iue->flags)) > - iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER; > - > - iu->srp.rsp.data_in_res_cnt = 0; > - iu->srp.rsp.data_out_res_cnt = 0; > - > - iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID; > - > - iu->srp.rsp.resp_data_len = 0; > - iu->srp.rsp.status = status; > - if (status) { > - uint8_t *sense = iu->srp.rsp.data; > - > - if (sc) { > - iu->srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID; > - iu->srp.rsp.sense_data_len = SCSI_SENSE_BUFFERSIZE; > - memcpy(sense, sc->sense_buffer, SCSI_SENSE_BUFFERSIZE); > - } else { > - iu->srp.rsp.status = SAM_STAT_CHECK_CONDITION; > - iu->srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID; > - iu->srp.rsp.sense_data_len = SRP_RSP_SENSE_DATA_LEN; > - > - /* Valid bit and 'current errors' */ > - sense[0] = (0x1 << 7 | 0x70); > - /* Sense key */ > - sense[2] = status; > - /* Additional sense length */ > - sense[7] = 0xa; /* 10 bytes */ > - /* Additional sense code */ > - sense[12] = asc; > - } > - } > - > - send_iu(iue, sizeof(iu->srp.rsp) + SRP_RSP_SENSE_DATA_LEN, > - VIOSRP_SRP_FORMAT); > - > - return 0; > -} > - > -static void handle_cmd_queue(struct srp_target *target) > -{ > - struct Scsi_Host *shost = target->shost; > - struct srp_rport *rport = target_to_port(target)->rport; > - struct iu_entry *iue; > - struct srp_cmd *cmd; > - unsigned long flags; > - int err; > - > -retry: > - spin_lock_irqsave(&target->lock, flags); > - > - list_for_each_entry(iue, &target->cmd_queue, ilist) { > - if (!test_and_set_bit(V_FLYING, &iue->flags)) { > - spin_unlock_irqrestore(&target->lock, flags); > - cmd = iue->sbuf->buf; > - err = srp_cmd_queue(shost, cmd, iue, > - (unsigned long)rport, 0); > - if (err) { > - eprintk("cannot queue cmd %p %d\n", cmd, err); > - srp_iu_put(iue); > - } > - goto retry; > - } > - } > - > - spin_unlock_irqrestore(&target->lock, flags); > -} > - > -static int ibmvstgt_rdma(struct scsi_cmnd *sc, struct scatterlist *sg, int nsg, > - struct srp_direct_buf *md, int nmd, > - enum dma_data_direction dir, unsigned int rest) > -{ > - struct iu_entry *iue = (struct iu_entry *) sc->SCp.ptr; > - struct srp_target *target = iue->target; > - struct vio_port *vport = target_to_port(target); > - dma_addr_t token; > - long err; > - unsigned int done = 0; > - int i, sidx, soff; > - > - sidx = soff = 0; > - token = sg_dma_address(sg + sidx); > - > - for (i = 0; i < nmd && rest; i++) { > - unsigned int mdone, mlen; > - > - mlen = min(rest, md[i].len); > - for (mdone = 0; mlen;) { > - int slen = min(sg_dma_len(sg + sidx) - soff, mlen); > - > - if (dir == DMA_TO_DEVICE) > - err = h_copy_rdma(slen, > - vport->riobn, > - md[i].va + mdone, > - vport->liobn, > - token + soff); > - else > - err = h_copy_rdma(slen, > - vport->liobn, > - token + soff, > - vport->riobn, > - md[i].va + mdone); > - > - if (err != H_SUCCESS) { > - eprintk("rdma error %d %d %ld\n", dir, slen, err); > - return -EIO; > - } > - > - mlen -= slen; > - mdone += slen; > - soff += slen; > - done += slen; > - > - if (soff == sg_dma_len(sg + sidx)) { > - sidx++; > - soff = 0; > - token = sg_dma_address(sg + sidx); > - > - if (sidx > nsg) { > - eprintk("out of sg %p %d %d\n", > - iue, sidx, nsg); > - return -EIO; > - } > - } > - }; > - > - rest -= mlen; > - } > - return 0; > -} > - > -static int ibmvstgt_cmd_done(struct scsi_cmnd *sc, > - void (*done)(struct scsi_cmnd *)) > -{ > - unsigned long flags; > - struct iu_entry *iue = (struct iu_entry *) sc->SCp.ptr; > - struct srp_target *target = iue->target; > - int err = 0; > - > - dprintk("%p %p %x %u\n", iue, target, vio_iu(iue)->srp.cmd.cdb[0], > - scsi_sg_count(sc)); > - > - if (scsi_sg_count(sc)) > - err = srp_transfer_data(sc, &vio_iu(iue)->srp.cmd, ibmvstgt_rdma, 1, 1); > - > - spin_lock_irqsave(&target->lock, flags); > - list_del(&iue->ilist); > - spin_unlock_irqrestore(&target->lock, flags); > - > - if (err|| sc->result != SAM_STAT_GOOD) { > - eprintk("operation failed %p %d %x\n", > - iue, sc->result, vio_iu(iue)->srp.cmd.cdb[0]); > - send_rsp(iue, sc, HARDWARE_ERROR, 0x00); > - } else > - send_rsp(iue, sc, NO_SENSE, 0x00); > - > - done(sc); > - srp_iu_put(iue); > - return 0; > -} > - > -int send_adapter_info(struct iu_entry *iue, > - dma_addr_t remote_buffer, uint16_t length) > -{ > - struct srp_target *target = iue->target; > - struct vio_port *vport = target_to_port(target); > - struct Scsi_Host *shost = target->shost; > - dma_addr_t data_token; > - struct mad_adapter_info_data *info; > - int err; > - > - info = dma_alloc_coherent(target->dev, sizeof(*info), &data_token, > - GFP_KERNEL); > - if (!info) { > - eprintk("bad dma_alloc_coherent %p\n", target); > - return 1; > - } > - > - /* Get remote info */ > - err = h_copy_rdma(sizeof(*info), vport->riobn, remote_buffer, > - vport->liobn, data_token); > - if (err == H_SUCCESS) { > - dprintk("Client connect: %s (%d)\n", > - info->partition_name, info->partition_number); > - } > - > - memset(info, 0, sizeof(*info)); > - > - strcpy(info->srp_version, "16.a"); > - strncpy(info->partition_name, partition_name, > - sizeof(info->partition_name)); > - info->partition_number = partition_number; > - info->mad_version = 1; > - info->os_type = 2; > - info->port_max_txu[0] = shost->hostt->max_sectors << 9; > - > - /* Send our info to remote */ > - err = h_copy_rdma(sizeof(*info), vport->liobn, data_token, > - vport->riobn, remote_buffer); > - > - dma_free_coherent(target->dev, sizeof(*info), info, data_token); > - > - if (err != H_SUCCESS) { > - eprintk("Error sending adapter info %d\n", err); > - return 1; > - } > - > - return 0; > -} > - > -static void process_login(struct iu_entry *iue) > -{ > - union viosrp_iu *iu = vio_iu(iue); > - struct srp_login_rsp *rsp = &iu->srp.login_rsp; > - uint64_t tag = iu->srp.rsp.tag; > - struct Scsi_Host *shost = iue->target->shost; > - struct srp_target *target = host_to_srp_target(shost); > - struct vio_port *vport = target_to_port(target); > - struct srp_rport_identifiers ids; > - > - memset(&ids, 0, sizeof(ids)); > - sprintf(ids.port_id, "%x", vport->dma_dev->unit_address); > - ids.roles = SRP_RPORT_ROLE_INITIATOR; > - if (!vport->rport) > - vport->rport = srp_rport_add(shost, &ids); > - > - /* TODO handle case that requested size is wrong and > - * buffer format is wrong > - */ > - memset(iu, 0, sizeof(struct srp_login_rsp)); > - rsp->opcode = SRP_LOGIN_RSP; > - rsp->req_lim_delta = INITIAL_SRP_LIMIT; > - rsp->tag = tag; > - rsp->max_it_iu_len = sizeof(union srp_iu); > - rsp->max_ti_iu_len = sizeof(union srp_iu); > - /* direct and indirect */ > - rsp->buf_fmt = SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT; > - > - send_iu(iue, sizeof(*rsp), VIOSRP_SRP_FORMAT); > -} > - > -static inline void queue_cmd(struct iu_entry *iue) > -{ > - struct srp_target *target = iue->target; > - unsigned long flags; > - > - spin_lock_irqsave(&target->lock, flags); > - list_add_tail(&iue->ilist, &target->cmd_queue); > - spin_unlock_irqrestore(&target->lock, flags); > -} > - > -static int process_tsk_mgmt(struct iu_entry *iue) > -{ > - union viosrp_iu *iu = vio_iu(iue); > - int fn; > - > - dprintk("%p %u\n", iue, iu->srp.tsk_mgmt.tsk_mgmt_func); > - > - switch (iu->srp.tsk_mgmt.tsk_mgmt_func) { > - case SRP_TSK_ABORT_TASK: > - fn = ABORT_TASK; > - break; > - case SRP_TSK_ABORT_TASK_SET: > - fn = ABORT_TASK_SET; > - break; > - case SRP_TSK_CLEAR_TASK_SET: > - fn = CLEAR_TASK_SET; > - break; > - case SRP_TSK_LUN_RESET: > - fn = LOGICAL_UNIT_RESET; > - break; > - case SRP_TSK_CLEAR_ACA: > - fn = CLEAR_ACA; > - break; > - default: > - fn = 0; > - } > - if (fn) > - scsi_tgt_tsk_mgmt_request(iue->target->shost, > - (unsigned long)iue->target->shost, > - fn, > - iu->srp.tsk_mgmt.task_tag, > - (struct scsi_lun *) &iu->srp.tsk_mgmt.lun, > - iue); > - else > - send_rsp(iue, NULL, ILLEGAL_REQUEST, 0x20); > - > - return !fn; > -} > - > -static int process_mad_iu(struct iu_entry *iue) > -{ > - union viosrp_iu *iu = vio_iu(iue); > - struct viosrp_adapter_info *info; > - struct viosrp_host_config *conf; > - > - switch (iu->mad.empty_iu.common.type) { > - case VIOSRP_EMPTY_IU_TYPE: > - eprintk("%s\n", "Unsupported EMPTY MAD IU"); > - break; > - case VIOSRP_ERROR_LOG_TYPE: > - eprintk("%s\n", "Unsupported ERROR LOG MAD IU"); > - iu->mad.error_log.common.status = 1; > - send_iu(iue, sizeof(iu->mad.error_log), VIOSRP_MAD_FORMAT); > - break; > - case VIOSRP_ADAPTER_INFO_TYPE: > - info = &iu->mad.adapter_info; > - info->common.status = send_adapter_info(iue, info->buffer, > - info->common.length); > - send_iu(iue, sizeof(*info), VIOSRP_MAD_FORMAT); > - break; > - case VIOSRP_HOST_CONFIG_TYPE: > - conf = &iu->mad.host_config; > - conf->common.status = 1; > - send_iu(iue, sizeof(*conf), VIOSRP_MAD_FORMAT); > - break; > - default: > - eprintk("Unknown type %u\n", iu->srp.rsp.opcode); > - } > - > - return 1; > -} > - > -static int process_srp_iu(struct iu_entry *iue) > -{ > - union viosrp_iu *iu = vio_iu(iue); > - int done = 1; > - u8 opcode = iu->srp.rsp.opcode; > - > - switch (opcode) { > - case SRP_LOGIN_REQ: > - process_login(iue); > - break; > - case SRP_TSK_MGMT: > - done = process_tsk_mgmt(iue); > - break; > - case SRP_CMD: > - queue_cmd(iue); > - done = 0; > - break; > - case SRP_LOGIN_RSP: > - case SRP_I_LOGOUT: > - case SRP_T_LOGOUT: > - case SRP_RSP: > - case SRP_CRED_REQ: > - case SRP_CRED_RSP: > - case SRP_AER_REQ: > - case SRP_AER_RSP: > - eprintk("Unsupported type %u\n", opcode); > - break; > - default: > - eprintk("Unknown type %u\n", opcode); > - } > - > - return done; > -} > - > -static void process_iu(struct viosrp_crq *crq, struct srp_target *target) > -{ > - struct vio_port *vport = target_to_port(target); > - struct iu_entry *iue; > - long err; > - int done = 1; > - > - iue = srp_iu_get(target); > - if (!iue) { > - eprintk("Error getting IU from pool, %p\n", target); > - return; > - } > - > - iue->remote_token = crq->IU_data_ptr; > - > - err = h_copy_rdma(crq->IU_length, vport->riobn, > - iue->remote_token, vport->liobn, iue->sbuf->dma); > - > - if (err != H_SUCCESS) { > - eprintk("%ld transferring data error %p\n", err, iue); > - goto out; > - } > - > - if (crq->format == VIOSRP_MAD_FORMAT) > - done = process_mad_iu(iue); > - else > - done = process_srp_iu(iue); > -out: > - if (done) > - srp_iu_put(iue); > -} > - > -static irqreturn_t ibmvstgt_interrupt(int dummy, void *data) > -{ > - struct srp_target *target = data; > - struct vio_port *vport = target_to_port(target); > - > - vio_disable_interrupts(vport->dma_dev); > - queue_work(vtgtd, &vport->crq_work); > - > - return IRQ_HANDLED; > -} > - > -static int crq_queue_create(struct crq_queue *queue, struct srp_target *target) > -{ > - int err; > - struct vio_port *vport = target_to_port(target); > - > - queue->msgs = (struct viosrp_crq *) get_zeroed_page(GFP_KERNEL); > - if (!queue->msgs) > - goto malloc_failed; > - queue->size = PAGE_SIZE / sizeof(*queue->msgs); > - > - queue->msg_token = dma_map_single(target->dev, queue->msgs, > - queue->size * sizeof(*queue->msgs), > - DMA_BIDIRECTIONAL); > - > - if (dma_mapping_error(target->dev, queue->msg_token)) > - goto map_failed; > - > - err = h_reg_crq(vport->dma_dev->unit_address, queue->msg_token, > - PAGE_SIZE); > - > - /* If the adapter was left active for some reason (like kexec) > - * try freeing and re-registering > - */ > - if (err == H_RESOURCE) { > - do { > - err = h_free_crq(vport->dma_dev->unit_address); > - } while (err == H_BUSY || H_IS_LONG_BUSY(err)); > - > - err = h_reg_crq(vport->dma_dev->unit_address, queue->msg_token, > - PAGE_SIZE); > - } > - > - if (err != H_SUCCESS && err != 2) { > - eprintk("Error 0x%x opening virtual adapter\n", err); > - goto reg_crq_failed; > - } > - > - err = request_irq(vport->dma_dev->irq, &ibmvstgt_interrupt, > - 0, "ibmvstgt", target); > - if (err) > - goto req_irq_failed; > - > - vio_enable_interrupts(vport->dma_dev); > - > - h_send_crq(vport->dma_dev->unit_address, 0xC001000000000000, 0); > - > - queue->cur = 0; > - spin_lock_init(&queue->lock); > - > - return 0; > - > -req_irq_failed: > - do { > - err = h_free_crq(vport->dma_dev->unit_address); > - } while (err == H_BUSY || H_IS_LONG_BUSY(err)); > - > -reg_crq_failed: > - dma_unmap_single(target->dev, queue->msg_token, > - queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL); > -map_failed: > - free_page((unsigned long) queue->msgs); > - > -malloc_failed: > - return -ENOMEM; > -} > - > -static void crq_queue_destroy(struct srp_target *target) > -{ > - struct vio_port *vport = target_to_port(target); > - struct crq_queue *queue = &vport->crq_queue; > - int err; > - > - free_irq(vport->dma_dev->irq, target); > - do { > - err = h_free_crq(vport->dma_dev->unit_address); > - } while (err == H_BUSY || H_IS_LONG_BUSY(err)); > - > - dma_unmap_single(target->dev, queue->msg_token, > - queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL); > - > - free_page((unsigned long) queue->msgs); > -} > - > -static void process_crq(struct viosrp_crq *crq, struct srp_target *target) > -{ > - struct vio_port *vport = target_to_port(target); > - dprintk("%x %x\n", crq->valid, crq->format); > - > - switch (crq->valid) { > - case 0xC0: > - /* initialization */ > - switch (crq->format) { > - case 0x01: > - h_send_crq(vport->dma_dev->unit_address, > - 0xC002000000000000, 0); > - break; > - case 0x02: > - break; > - default: > - eprintk("Unknown format %u\n", crq->format); > - } > - break; > - case 0xFF: > - /* transport event */ > - break; > - case 0x80: > - /* real payload */ > - switch (crq->format) { > - case VIOSRP_SRP_FORMAT: > - case VIOSRP_MAD_FORMAT: > - process_iu(crq, target); > - break; > - case VIOSRP_OS400_FORMAT: > - case VIOSRP_AIX_FORMAT: > - case VIOSRP_LINUX_FORMAT: > - case VIOSRP_INLINE_FORMAT: > - eprintk("Unsupported format %u\n", crq->format); > - break; > - default: > - eprintk("Unknown format %u\n", crq->format); > - } > - break; > - default: > - eprintk("unknown message type 0x%02x!?\n", crq->valid); > - } > -} > - > -static inline struct viosrp_crq *next_crq(struct crq_queue *queue) > -{ > - struct viosrp_crq *crq; > - unsigned long flags; > - > - spin_lock_irqsave(&queue->lock, flags); > - crq = &queue->msgs[queue->cur]; > - if (crq->valid & 0x80) { > - if (++queue->cur == queue->size) > - queue->cur = 0; > - } else > - crq = NULL; > - spin_unlock_irqrestore(&queue->lock, flags); > - > - return crq; > -} > - > -static void handle_crq(struct work_struct *work) > -{ > - struct vio_port *vport = container_of(work, struct vio_port, crq_work); > - struct srp_target *target = vport->target; > - struct viosrp_crq *crq; > - int done = 0; > - > - while (!done) { > - while ((crq = next_crq(&vport->crq_queue)) != NULL) { > - process_crq(crq, target); > - crq->valid = 0x00; > - } > - > - vio_enable_interrupts(vport->dma_dev); > - > - crq = next_crq(&vport->crq_queue); > - if (crq) { > - vio_disable_interrupts(vport->dma_dev); > - process_crq(crq, target); > - crq->valid = 0x00; > - } else > - done = 1; > - } > - > - handle_cmd_queue(target); > -} > - > - > -static int ibmvstgt_eh_abort_handler(struct scsi_cmnd *sc) > -{ > - unsigned long flags; > - struct iu_entry *iue = (struct iu_entry *) sc->SCp.ptr; > - struct srp_target *target = iue->target; > - > - dprintk("%p %p %x\n", iue, target, vio_iu(iue)->srp.cmd.cdb[0]); > - > - spin_lock_irqsave(&target->lock, flags); > - list_del(&iue->ilist); > - spin_unlock_irqrestore(&target->lock, flags); > - > - srp_iu_put(iue); > - > - return 0; > -} > - > -static int ibmvstgt_tsk_mgmt_response(struct Scsi_Host *shost, > - u64 itn_id, u64 mid, int result) > -{ > - struct iu_entry *iue = (struct iu_entry *) ((void *) mid); > - union viosrp_iu *iu = vio_iu(iue); > - unsigned char status, asc; > - > - eprintk("%p %d\n", iue, result); > - status = NO_SENSE; > - asc = 0; > - > - switch (iu->srp.tsk_mgmt.tsk_mgmt_func) { > - case SRP_TSK_ABORT_TASK: > - asc = 0x14; > - if (result) > - status = ABORTED_COMMAND; > - break; > - default: > - break; > - } > - > - send_rsp(iue, NULL, status, asc); > - srp_iu_put(iue); > - > - return 0; > -} > - > -static int ibmvstgt_it_nexus_response(struct Scsi_Host *shost, u64 itn_id, > - int result) > -{ > - struct srp_target *target = host_to_srp_target(shost); > - struct vio_port *vport = target_to_port(target); > - > - if (result) { > - eprintk("%p %d\n", shost, result); > - srp_rport_del(vport->rport); > - vport->rport = NULL; > - } > - return 0; > -} > - > -static ssize_t system_id_show(struct device *dev, > - struct device_attribute *attr, char *buf) > -{ > - return snprintf(buf, PAGE_SIZE, "%s\n", system_id); > -} > - > -static ssize_t partition_number_show(struct device *dev, > - struct device_attribute *attr, char *buf) > -{ > - return snprintf(buf, PAGE_SIZE, "%x\n", partition_number); > -} > - > -static ssize_t unit_address_show(struct device *dev, > - struct device_attribute *attr, char *buf) > -{ > - struct Scsi_Host *shost = class_to_shost(dev); > - struct srp_target *target = host_to_srp_target(shost); > - struct vio_port *vport = target_to_port(target); > - return snprintf(buf, PAGE_SIZE, "%x\n", vport->dma_dev->unit_address); > -} > - > -static DEVICE_ATTR(system_id, S_IRUGO, system_id_show, NULL); > -static DEVICE_ATTR(partition_number, S_IRUGO, partition_number_show, NULL); > -static DEVICE_ATTR(unit_address, S_IRUGO, unit_address_show, NULL); > - > -static struct device_attribute *ibmvstgt_attrs[] = { > - &dev_attr_system_id, > - &dev_attr_partition_number, > - &dev_attr_unit_address, > - NULL, > -}; > - > -static struct scsi_host_template ibmvstgt_sht = { > - .name = TGT_NAME, > - .module = THIS_MODULE, > - .can_queue = INITIAL_SRP_LIMIT, > - .sg_tablesize = SG_ALL, > - .use_clustering = DISABLE_CLUSTERING, > - .max_sectors = DEFAULT_MAX_SECTORS, > - .transfer_response = ibmvstgt_cmd_done, > - .eh_abort_handler = ibmvstgt_eh_abort_handler, > - .shost_attrs = ibmvstgt_attrs, > - .proc_name = TGT_NAME, > - .supported_mode = MODE_TARGET, > -}; > - > -static int ibmvstgt_probe(struct vio_dev *dev, const struct vio_device_id *id) > -{ > - struct Scsi_Host *shost; > - struct srp_target *target; > - struct vio_port *vport; > - unsigned int *dma, dma_size; > - int err = -ENOMEM; > - > - vport = kzalloc(sizeof(struct vio_port), GFP_KERNEL); > - if (!vport) > - return err; > - shost = scsi_host_alloc(&ibmvstgt_sht, sizeof(struct srp_target)); > - if (!shost) > - goto free_vport; > - shost->transportt = ibmvstgt_transport_template; > - > - target = host_to_srp_target(shost); > - target->shost = shost; > - vport->dma_dev = dev; > - target->ldata = vport; > - vport->target = target; > - err = srp_target_alloc(target, &dev->dev, INITIAL_SRP_LIMIT, > - SRP_MAX_IU_LEN); > - if (err) > - goto put_host; > - > - dma = (unsigned int *) vio_get_attribute(dev, "ibm,my-dma-window", > - &dma_size); > - if (!dma || dma_size != 40) { > - eprintk("Couldn't get window property %d\n", dma_size); > - err = -EIO; > - goto free_srp_target; > - } > - vport->liobn = dma[0]; > - vport->riobn = dma[5]; > - > - INIT_WORK(&vport->crq_work, handle_crq); > - > - err = scsi_add_host(shost, target->dev); > - if (err) > - goto free_srp_target; > - > - err = scsi_tgt_alloc_queue(shost); > - if (err) > - goto remove_host; > - > - err = crq_queue_create(&vport->crq_queue, target); > - if (err) > - goto free_queue; > - > - return 0; > -free_queue: > - scsi_tgt_free_queue(shost); > -remove_host: > - scsi_remove_host(shost); > -free_srp_target: > - srp_target_free(target); > -put_host: > - scsi_host_put(shost); > -free_vport: > - kfree(vport); > - return err; > -} > - > -static int ibmvstgt_remove(struct vio_dev *dev) > -{ > - struct srp_target *target = dev_get_drvdata(&dev->dev); > - struct Scsi_Host *shost = target->shost; > - struct vio_port *vport = target->ldata; > - > - crq_queue_destroy(target); > - srp_remove_host(shost); > - scsi_remove_host(shost); > - scsi_tgt_free_queue(shost); > - srp_target_free(target); > - kfree(vport); > - scsi_host_put(shost); > - return 0; > -} > - > -static struct vio_device_id ibmvstgt_device_table[] = { > - {"v-scsi-host", "IBM,v-scsi-host"}, > - {"",""} > -}; > - > -MODULE_DEVICE_TABLE(vio, ibmvstgt_device_table); > - > -static struct vio_driver ibmvstgt_driver = { > - .id_table = ibmvstgt_device_table, > - .probe = ibmvstgt_probe, > - .remove = ibmvstgt_remove, > - .name = "ibmvscsis", > -}; > - > -static int get_system_info(void) > -{ > - struct device_node *rootdn; > - const char *id, *model, *name; > - const unsigned int *num; > - > - rootdn = of_find_node_by_path("/"); > - if (!rootdn) > - return -ENOENT; > - > - model = of_get_property(rootdn, "model", NULL); > - id = of_get_property(rootdn, "system-id", NULL); > - if (model && id) > - snprintf(system_id, sizeof(system_id), "%s-%s", model, id); > - > - name = of_get_property(rootdn, "ibm,partition-name", NULL); > - if (name) > - strncpy(partition_name, name, sizeof(partition_name)); > - > - num = of_get_property(rootdn, "ibm,partition-no", NULL); > - if (num) > - partition_number = *num; > - > - of_node_put(rootdn); > - return 0; > -} > - > -static struct srp_function_template ibmvstgt_transport_functions = { > - .tsk_mgmt_response = ibmvstgt_tsk_mgmt_response, > - .it_nexus_response = ibmvstgt_it_nexus_response, > -}; > - > -static int __init ibmvstgt_init(void) > -{ > - int err = -ENOMEM; > - > - printk("IBM eServer i/pSeries Virtual SCSI Target Driver\n"); > - > - ibmvstgt_transport_template = > - srp_attach_transport(&ibmvstgt_transport_functions); > - if (!ibmvstgt_transport_template) > - return err; > - > - vtgtd = create_workqueue("ibmvtgtd"); > - if (!vtgtd) > - goto release_transport; > - > - err = get_system_info(); > - if (err) > - goto destroy_wq; > - > - err = vio_register_driver(&ibmvstgt_driver); > - if (err) > - goto destroy_wq; > - > - return 0; > -destroy_wq: > - destroy_workqueue(vtgtd); > -release_transport: > - srp_release_transport(ibmvstgt_transport_template); > - return err; > -} > - > -static void __exit ibmvstgt_exit(void) > -{ > - printk("Unregister IBM virtual SCSI driver\n"); > - > - destroy_workqueue(vtgtd); > - vio_unregister_driver(&ibmvstgt_driver); > - srp_release_transport(ibmvstgt_transport_template); > -} > - > -MODULE_DESCRIPTION("IBM Virtual SCSI Target"); > -MODULE_AUTHOR("Santiago Leon"); > -MODULE_LICENSE("GPL"); > - > -module_init(ibmvstgt_init); > -module_exit(ibmvstgt_exit); > -- 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
