[PATCH 3/3] cxgb3i: change cxgb3i to use libcxgbi From: Karen Xie <kxie@xxxxxxxxxxx> Change cxgb3i to make use of libcxgbi. Signed-off-by: Karen Xie <kxie@xxxxxxxxxxx> --- drivers/scsi/cxgbi/Kconfig | 9 drivers/scsi/cxgbi/Makefile | 1 drivers/scsi/cxgbi/cxgb3i/Kbuild | 3 drivers/scsi/cxgbi/cxgb3i/Kconfig | 7 drivers/scsi/cxgbi/cxgb3i/cxgb3i.c | 1372 ++++++++++++++++++++++++++++++++++++ drivers/scsi/cxgbi/cxgb3i/cxgb3i.h | 53 + drivers/scsi/cxgbi/cxgb4i/Kconfig | 7 7 files changed, 1445 insertions(+), 7 deletions(-) create mode 100644 drivers/scsi/cxgbi/cxgb3i/Kbuild create mode 100644 drivers/scsi/cxgbi/cxgb3i/Kconfig create mode 100644 drivers/scsi/cxgbi/cxgb3i/cxgb3i.c create mode 100644 drivers/scsi/cxgbi/cxgb3i/cxgb3i.h create mode 100644 drivers/scsi/cxgbi/cxgb4i/Kconfig diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 704622d..256fdf4 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -370,7 +370,6 @@ config ISCSI_TCP http://open-iscsi.org -source "drivers/scsi/cxgb3i/Kconfig" source "drivers/scsi/cxgbi/Kconfig" source "drivers/scsi/bnx2i/Kconfig" source "drivers/scsi/be2iscsi/Kconfig" diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile index 1694ab7..cf42c57 100644 --- a/drivers/scsi/Makefile +++ b/drivers/scsi/Makefile @@ -132,7 +132,7 @@ obj-$(CONFIG_SCSI_HPTIOP) += hptiop.o obj-$(CONFIG_SCSI_STEX) += stex.o obj-$(CONFIG_SCSI_MVSAS) += mvsas/ obj-$(CONFIG_PS3_ROM) += ps3rom.o -obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libiscsi.o libiscsi_tcp.o cxgb3i/ +obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libiscsi.o libiscsi_tcp.o cxgbi/ obj-$(CONFIG_SCSI_CXGB4_ISCSI) += libiscsi.o libiscsi_tcp.o cxgbi/ obj-$(CONFIG_SCSI_BNX2_ISCSI) += libiscsi.o bnx2i/ obj-$(CONFIG_BE2ISCSI) += libiscsi.o be2iscsi/ diff --git a/drivers/scsi/cxgb3i/Kbuild b/drivers/scsi/cxgb3i/Kbuild deleted file mode 100644 index 70d060b..0000000 --- a/drivers/scsi/cxgb3i/Kbuild +++ /dev/null @@ -1,4 +0,0 @@ -EXTRA_CFLAGS += -I$(srctree)/drivers/net/cxgb3 - -cxgb3i-y := cxgb3i_init.o cxgb3i_iscsi.o cxgb3i_pdu.o cxgb3i_offload.o cxgb3i_ddp.o -obj-$(CONFIG_SCSI_CXGB3_ISCSI) += cxgb3i.o diff --git a/drivers/scsi/cxgb3i/Kconfig b/drivers/scsi/cxgb3i/Kconfig deleted file mode 100644 index bfdcaf5..0000000 --- a/drivers/scsi/cxgb3i/Kconfig +++ /dev/null @@ -1,7 +0,0 @@ -config SCSI_CXGB3_ISCSI - tristate "Chelsio S3xx iSCSI support" - depends on CHELSIO_T3_DEPENDS - select CHELSIO_T3 - select SCSI_ISCSI_ATTRS - ---help--- - This driver supports iSCSI offload for the Chelsio S3 series devices. diff --git a/drivers/scsi/cxgb3i/cxgb3i.h b/drivers/scsi/cxgb3i/cxgb3i.h deleted file mode 100644 index e3133b5..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i.h +++ /dev/null @@ -1,161 +0,0 @@ -/* - * cxgb3i.h: Chelsio S3xx iSCSI driver. - * - * Copyright (c) 2008 Chelsio Communications, 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. - * - * Written by: Karen Xie (kxie@xxxxxxxxxxx) - */ - -#ifndef __CXGB3I_H__ -#define __CXGB3I_H__ - -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/errno.h> -#include <linux/types.h> -#include <linux/list.h> -#include <linux/netdevice.h> -#include <linux/scatterlist.h> -#include <linux/skbuff.h> -#include <scsi/libiscsi_tcp.h> - -/* from cxgb3 LLD */ -#include "common.h" -#include "t3_cpl.h" -#include "t3cdev.h" -#include "cxgb3_ctl_defs.h" -#include "cxgb3_offload.h" -#include "firmware_exports.h" - -#include "cxgb3i_offload.h" -#include "cxgb3i_ddp.h" - -#define CXGB3I_SCSI_HOST_QDEPTH 1024 -#define CXGB3I_MAX_TARGET CXGB3I_MAX_CONN -#define CXGB3I_MAX_LUN 512 -#define ISCSI_PDU_NONPAYLOAD_MAX \ - (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE + 2*ISCSI_DIGEST_SIZE) - -struct cxgb3i_adapter; -struct cxgb3i_hba; -struct cxgb3i_endpoint; - -/** - * struct cxgb3i_hba - cxgb3i iscsi structure (per port) - * - * @snic: cxgb3i adapter containing this port - * @ndev: pointer to netdev structure - * @shost: pointer to scsi host structure - */ -struct cxgb3i_hba { - struct cxgb3i_adapter *snic; - struct net_device *ndev; - struct Scsi_Host *shost; -}; - -/** - * struct cxgb3i_adapter - cxgb3i adapter structure (per pci) - * - * @listhead: list head to link elements - * @lock: lock for this structure - * @tdev: pointer to t3cdev used by cxgb3 driver - * @pdev: pointer to pci dev - * @hba_cnt: # of hbas (the same as # of ports) - * @hba: all the hbas on this adapter - * @flags: bit flag for adapter event/status - * @tx_max_size: max. tx packet size supported - * @rx_max_size: max. rx packet size supported - * @tag_format: ddp tag format settings - */ -#define CXGB3I_ADAPTER_FLAG_RESET 0x1 -struct cxgb3i_adapter { - struct list_head list_head; - spinlock_t lock; - struct t3cdev *tdev; - struct pci_dev *pdev; - unsigned char hba_cnt; - struct cxgb3i_hba *hba[MAX_NPORTS]; - - unsigned int flags; - unsigned int tx_max_size; - unsigned int rx_max_size; - - struct cxgb3i_tag_format tag_format; -}; - -/** - * struct cxgb3i_conn - cxgb3i iscsi connection - * - * @listhead: list head to link elements - * @cep: pointer to iscsi_endpoint structure - * @conn: pointer to iscsi_conn structure - * @hba: pointer to the hba this conn. is going through - * @task_idx_bits: # of bits needed for session->cmds_max - */ -struct cxgb3i_conn { - struct list_head list_head; - struct cxgb3i_endpoint *cep; - struct iscsi_conn *conn; - struct cxgb3i_hba *hba; - unsigned int task_idx_bits; -}; - -/** - * struct cxgb3i_endpoint - iscsi tcp endpoint - * - * @c3cn: the h/w tcp connection representation - * @hba: pointer to the hba this conn. is going through - * @cconn: pointer to the associated cxgb3i iscsi connection - */ -struct cxgb3i_endpoint { - struct s3_conn *c3cn; - struct cxgb3i_hba *hba; - struct cxgb3i_conn *cconn; -}; - -/** - * struct cxgb3i_task_data - private iscsi task data - * - * @nr_frags: # of coalesced page frags (from scsi sgl) - * @frags: coalesced page frags (from scsi sgl) - * @skb: tx pdu skb - * @offset: data offset for the next pdu - * @count: max. possible pdu payload - * @sgoffset: offset to the first sg entry for a given offset - */ -#define MAX_PDU_FRAGS ((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512) -struct cxgb3i_task_data { - unsigned short nr_frags; - skb_frag_t frags[MAX_PDU_FRAGS]; - struct sk_buff *skb; - unsigned int offset; - unsigned int count; - unsigned int sgoffset; -}; - -int cxgb3i_iscsi_init(void); -void cxgb3i_iscsi_cleanup(void); - -struct cxgb3i_adapter *cxgb3i_adapter_find_by_tdev(struct t3cdev *); -void cxgb3i_adapter_open(struct t3cdev *); -void cxgb3i_adapter_close(struct t3cdev *); - -struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *, - struct net_device *); -void cxgb3i_hba_host_remove(struct cxgb3i_hba *); - -int cxgb3i_pdu_init(void); -void cxgb3i_pdu_cleanup(void); -void cxgb3i_conn_cleanup_task(struct iscsi_task *); -int cxgb3i_conn_alloc_pdu(struct iscsi_task *, u8); -int cxgb3i_conn_init_pdu(struct iscsi_task *, unsigned int, unsigned int); -int cxgb3i_conn_xmit_pdu(struct iscsi_task *); - -void cxgb3i_release_itt(struct iscsi_task *task, itt_t hdr_itt); -int cxgb3i_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt); - -#endif diff --git a/drivers/scsi/cxgb3i/cxgb3i_ddp.c b/drivers/scsi/cxgb3i/cxgb3i_ddp.c deleted file mode 100644 index be0e230..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i_ddp.c +++ /dev/null @@ -1,773 +0,0 @@ -/* - * cxgb3i_ddp.c: Chelsio S3xx iSCSI DDP Manager. - * - * Copyright (c) 2008 Chelsio Communications, 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. - * - * Written by: Karen Xie (kxie@xxxxxxxxxxx) - */ - -#include <linux/slab.h> -#include <linux/skbuff.h> -#include <linux/scatterlist.h> - -/* from cxgb3 LLD */ -#include "common.h" -#include "t3_cpl.h" -#include "t3cdev.h" -#include "cxgb3_ctl_defs.h" -#include "cxgb3_offload.h" -#include "firmware_exports.h" - -#include "cxgb3i_ddp.h" - -#define ddp_log_error(fmt...) printk(KERN_ERR "cxgb3i_ddp: ERR! " fmt) -#define ddp_log_warn(fmt...) printk(KERN_WARNING "cxgb3i_ddp: WARN! " fmt) -#define ddp_log_info(fmt...) printk(KERN_INFO "cxgb3i_ddp: " fmt) - -#ifdef __DEBUG_CXGB3I_DDP__ -#define ddp_log_debug(fmt, args...) \ - printk(KERN_INFO "cxgb3i_ddp: %s - " fmt, __func__ , ## args) -#else -#define ddp_log_debug(fmt...) -#endif - -/* - * iSCSI Direct Data Placement - * - * T3 h/w can directly place the iSCSI Data-In or Data-Out PDU's payload into - * pre-posted final destination host-memory buffers based on the Initiator - * Task Tag (ITT) in Data-In or Target Task Tag (TTT) in Data-Out PDUs. - * - * The host memory address is programmed into h/w in the format of pagepod - * entries. - * The location of the pagepod entry is encoded into ddp tag which is used or - * is the base for ITT/TTT. - */ - -#define DDP_PGIDX_MAX 4 -#define DDP_THRESHOLD 2048 -static unsigned char ddp_page_order[DDP_PGIDX_MAX] = {0, 1, 2, 4}; -static unsigned char ddp_page_shift[DDP_PGIDX_MAX] = {12, 13, 14, 16}; -static unsigned char page_idx = DDP_PGIDX_MAX; - -/* - * functions to program the pagepod in h/w - */ -static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) -{ - struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; - - req->wr.wr_lo = 0; - req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); - req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | - V_ULPTX_CMD(ULP_MEM_WRITE)); - req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) | - V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1)); -} - -static int set_ddp_map(struct cxgb3i_ddp_info *ddp, struct pagepod_hdr *hdr, - unsigned int idx, unsigned int npods, - struct cxgb3i_gather_list *gl) -{ - unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; - int i; - - for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { - struct sk_buff *skb = ddp->gl_skb[idx]; - struct pagepod *ppod; - int j, pidx; - - /* hold on to the skb until we clear the ddp mapping */ - skb_get(skb); - - ulp_mem_io_set_hdr(skb, pm_addr); - ppod = (struct pagepod *) - (skb->head + sizeof(struct ulp_mem_io)); - memcpy(&(ppod->hdr), hdr, sizeof(struct pagepod)); - for (pidx = 4 * i, j = 0; j < 5; ++j, ++pidx) - ppod->addr[j] = pidx < gl->nelem ? - cpu_to_be64(gl->phys_addr[pidx]) : 0UL; - - skb->priority = CPL_PRIORITY_CONTROL; - cxgb3_ofld_send(ddp->tdev, skb); - } - return 0; -} - -static void clear_ddp_map(struct cxgb3i_ddp_info *ddp, unsigned int tag, - unsigned int idx, unsigned int npods) -{ - unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; - int i; - - for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { - struct sk_buff *skb = ddp->gl_skb[idx]; - - if (!skb) { - ddp_log_error("ddp tag 0x%x, 0x%x, %d/%u, skb NULL.\n", - tag, idx, i, npods); - continue; - } - ddp->gl_skb[idx] = NULL; - memset((skb->head + sizeof(struct ulp_mem_io)), 0, PPOD_SIZE); - ulp_mem_io_set_hdr(skb, pm_addr); - skb->priority = CPL_PRIORITY_CONTROL; - cxgb3_ofld_send(ddp->tdev, skb); - } -} - -static inline int ddp_find_unused_entries(struct cxgb3i_ddp_info *ddp, - unsigned int start, unsigned int max, - unsigned int count, - struct cxgb3i_gather_list *gl) -{ - unsigned int i, j, k; - - /* not enough entries */ - if ((max - start) < count) - return -EBUSY; - - max -= count; - spin_lock(&ddp->map_lock); - for (i = start; i < max;) { - for (j = 0, k = i; j < count; j++, k++) { - if (ddp->gl_map[k]) - break; - } - if (j == count) { - for (j = 0, k = i; j < count; j++, k++) - ddp->gl_map[k] = gl; - spin_unlock(&ddp->map_lock); - return i; - } - i += j + 1; - } - spin_unlock(&ddp->map_lock); - return -EBUSY; -} - -static inline void ddp_unmark_entries(struct cxgb3i_ddp_info *ddp, - int start, int count) -{ - spin_lock(&ddp->map_lock); - memset(&ddp->gl_map[start], 0, - count * sizeof(struct cxgb3i_gather_list *)); - spin_unlock(&ddp->map_lock); -} - -static inline void ddp_free_gl_skb(struct cxgb3i_ddp_info *ddp, - int idx, int count) -{ - int i; - - for (i = 0; i < count; i++, idx++) - if (ddp->gl_skb[idx]) { - kfree_skb(ddp->gl_skb[idx]); - ddp->gl_skb[idx] = NULL; - } -} - -static inline int ddp_alloc_gl_skb(struct cxgb3i_ddp_info *ddp, int idx, - int count, gfp_t gfp) -{ - int i; - - for (i = 0; i < count; i++) { - struct sk_buff *skb = alloc_skb(sizeof(struct ulp_mem_io) + - PPOD_SIZE, gfp); - if (skb) { - ddp->gl_skb[idx + i] = skb; - skb_put(skb, sizeof(struct ulp_mem_io) + PPOD_SIZE); - } else { - ddp_free_gl_skb(ddp, idx, i); - return -ENOMEM; - } - } - return 0; -} - -/** - * cxgb3i_ddp_find_page_index - return ddp page index for a given page size - * @pgsz: page size - * return the ddp page index, if no match is found return DDP_PGIDX_MAX. - */ -int cxgb3i_ddp_find_page_index(unsigned long pgsz) -{ - int i; - - for (i = 0; i < DDP_PGIDX_MAX; i++) { - if (pgsz == (1UL << ddp_page_shift[i])) - return i; - } - ddp_log_debug("ddp page size 0x%lx not supported.\n", pgsz); - return DDP_PGIDX_MAX; -} - -/** - * cxgb3i_ddp_adjust_page_table - adjust page table with PAGE_SIZE - * return the ddp page index, if no match is found return DDP_PGIDX_MAX. - */ -int cxgb3i_ddp_adjust_page_table(void) -{ - int i; - unsigned int base_order, order; - - if (PAGE_SIZE < (1UL << ddp_page_shift[0])) { - ddp_log_info("PAGE_SIZE 0x%lx too small, min. 0x%lx.\n", - PAGE_SIZE, 1UL << ddp_page_shift[0]); - return -EINVAL; - } - - base_order = get_order(1UL << ddp_page_shift[0]); - order = get_order(1 << PAGE_SHIFT); - for (i = 0; i < DDP_PGIDX_MAX; i++) { - /* first is the kernel page size, then just doubling the size */ - ddp_page_order[i] = order - base_order + i; - ddp_page_shift[i] = PAGE_SHIFT + i; - } - return 0; -} - -static inline void ddp_gl_unmap(struct pci_dev *pdev, - struct cxgb3i_gather_list *gl) -{ - int i; - - for (i = 0; i < gl->nelem; i++) - pci_unmap_page(pdev, gl->phys_addr[i], PAGE_SIZE, - PCI_DMA_FROMDEVICE); -} - -static inline int ddp_gl_map(struct pci_dev *pdev, - struct cxgb3i_gather_list *gl) -{ - int i; - - for (i = 0; i < gl->nelem; i++) { - gl->phys_addr[i] = pci_map_page(pdev, gl->pages[i], 0, - PAGE_SIZE, - PCI_DMA_FROMDEVICE); - if (unlikely(pci_dma_mapping_error(pdev, gl->phys_addr[i]))) - goto unmap; - } - - return i; - -unmap: - if (i) { - unsigned int nelem = gl->nelem; - - gl->nelem = i; - ddp_gl_unmap(pdev, gl); - gl->nelem = nelem; - } - return -ENOMEM; -} - -/** - * cxgb3i_ddp_make_gl - build ddp page buffer list - * @xferlen: total buffer length - * @sgl: page buffer scatter-gather list - * @sgcnt: # of page buffers - * @pdev: pci_dev, used for pci map - * @gfp: allocation mode - * - * construct a ddp page buffer list from the scsi scattergather list. - * coalesce buffers as much as possible, and obtain dma addresses for - * each page. - * - * Return the cxgb3i_gather_list constructed from the page buffers if the - * memory can be used for ddp. Return NULL otherwise. - */ -struct cxgb3i_gather_list *cxgb3i_ddp_make_gl(unsigned int xferlen, - struct scatterlist *sgl, - unsigned int sgcnt, - struct pci_dev *pdev, - gfp_t gfp) -{ - struct cxgb3i_gather_list *gl; - struct scatterlist *sg = sgl; - struct page *sgpage = sg_page(sg); - unsigned int sglen = sg->length; - unsigned int sgoffset = sg->offset; - unsigned int npages = (xferlen + sgoffset + PAGE_SIZE - 1) >> - PAGE_SHIFT; - int i = 1, j = 0; - - if (xferlen < DDP_THRESHOLD) { - ddp_log_debug("xfer %u < threshold %u, no ddp.\n", - xferlen, DDP_THRESHOLD); - return NULL; - } - - gl = kzalloc(sizeof(struct cxgb3i_gather_list) + - npages * (sizeof(dma_addr_t) + sizeof(struct page *)), - gfp); - if (!gl) - return NULL; - - gl->pages = (struct page **)&gl->phys_addr[npages]; - gl->length = xferlen; - gl->offset = sgoffset; - gl->pages[0] = sgpage; - - sg = sg_next(sg); - while (sg) { - struct page *page = sg_page(sg); - - if (sgpage == page && sg->offset == sgoffset + sglen) - sglen += sg->length; - else { - /* make sure the sgl is fit for ddp: - * each has the same page size, and - * all of the middle pages are used completely - */ - if ((j && sgoffset) || - ((i != sgcnt - 1) && - ((sglen + sgoffset) & ~PAGE_MASK))) - goto error_out; - - j++; - if (j == gl->nelem || sg->offset) - goto error_out; - gl->pages[j] = page; - sglen = sg->length; - sgoffset = sg->offset; - sgpage = page; - } - i++; - sg = sg_next(sg); - } - gl->nelem = ++j; - - if (ddp_gl_map(pdev, gl) < 0) - goto error_out; - - return gl; - -error_out: - kfree(gl); - return NULL; -} - -/** - * cxgb3i_ddp_release_gl - release a page buffer list - * @gl: a ddp page buffer list - * @pdev: pci_dev used for pci_unmap - * free a ddp page buffer list resulted from cxgb3i_ddp_make_gl(). - */ -void cxgb3i_ddp_release_gl(struct cxgb3i_gather_list *gl, - struct pci_dev *pdev) -{ - ddp_gl_unmap(pdev, gl); - kfree(gl); -} - -/** - * cxgb3i_ddp_tag_reserve - set up ddp for a data transfer - * @tdev: t3cdev adapter - * @tid: connection id - * @tformat: tag format - * @tagp: contains s/w tag initially, will be updated with ddp/hw tag - * @gl: the page momory list - * @gfp: allocation mode - * - * ddp setup for a given page buffer list and construct the ddp tag. - * return 0 if success, < 0 otherwise. - */ -int cxgb3i_ddp_tag_reserve(struct t3cdev *tdev, unsigned int tid, - struct cxgb3i_tag_format *tformat, u32 *tagp, - struct cxgb3i_gather_list *gl, gfp_t gfp) -{ - struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; - struct pagepod_hdr hdr; - unsigned int npods; - int idx = -1; - int err = -ENOMEM; - u32 sw_tag = *tagp; - u32 tag; - - if (page_idx >= DDP_PGIDX_MAX || !ddp || !gl || !gl->nelem || - gl->length < DDP_THRESHOLD) { - ddp_log_debug("pgidx %u, xfer %u/%u, NO ddp.\n", - page_idx, gl->length, DDP_THRESHOLD); - return -EINVAL; - } - - npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; - - if (ddp->idx_last == ddp->nppods) - idx = ddp_find_unused_entries(ddp, 0, ddp->nppods, npods, gl); - else { - idx = ddp_find_unused_entries(ddp, ddp->idx_last + 1, - ddp->nppods, npods, gl); - if (idx < 0 && ddp->idx_last >= npods) { - idx = ddp_find_unused_entries(ddp, 0, - min(ddp->idx_last + npods, ddp->nppods), - npods, gl); - } - } - if (idx < 0) { - ddp_log_debug("xferlen %u, gl %u, npods %u NO DDP.\n", - gl->length, gl->nelem, npods); - return idx; - } - - err = ddp_alloc_gl_skb(ddp, idx, npods, gfp); - if (err < 0) - goto unmark_entries; - - tag = cxgb3i_ddp_tag_base(tformat, sw_tag); - tag |= idx << PPOD_IDX_SHIFT; - - hdr.rsvd = 0; - hdr.vld_tid = htonl(F_PPOD_VALID | V_PPOD_TID(tid)); - hdr.pgsz_tag_clr = htonl(tag & ddp->rsvd_tag_mask); - hdr.maxoffset = htonl(gl->length); - hdr.pgoffset = htonl(gl->offset); - - err = set_ddp_map(ddp, &hdr, idx, npods, gl); - if (err < 0) - goto free_gl_skb; - - ddp->idx_last = idx; - ddp_log_debug("xfer %u, gl %u,%u, tid 0x%x, 0x%x -> 0x%x(%u,%u).\n", - gl->length, gl->nelem, gl->offset, tid, sw_tag, tag, - idx, npods); - *tagp = tag; - return 0; - -free_gl_skb: - ddp_free_gl_skb(ddp, idx, npods); -unmark_entries: - ddp_unmark_entries(ddp, idx, npods); - return err; -} - -/** - * cxgb3i_ddp_tag_release - release a ddp tag - * @tdev: t3cdev adapter - * @tag: ddp tag - * ddp cleanup for a given ddp tag and release all the resources held - */ -void cxgb3i_ddp_tag_release(struct t3cdev *tdev, u32 tag) -{ - struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; - u32 idx; - - if (!ddp) { - ddp_log_error("release ddp tag 0x%x, ddp NULL.\n", tag); - return; - } - - idx = (tag >> PPOD_IDX_SHIFT) & ddp->idx_mask; - if (idx < ddp->nppods) { - struct cxgb3i_gather_list *gl = ddp->gl_map[idx]; - unsigned int npods; - - if (!gl || !gl->nelem) { - ddp_log_error("release 0x%x, idx 0x%x, gl 0x%p, %u.\n", - tag, idx, gl, gl ? gl->nelem : 0); - return; - } - npods = (gl->nelem + PPOD_PAGES_MAX - 1) >> PPOD_PAGES_SHIFT; - ddp_log_debug("ddp tag 0x%x, release idx 0x%x, npods %u.\n", - tag, idx, npods); - clear_ddp_map(ddp, tag, idx, npods); - ddp_unmark_entries(ddp, idx, npods); - cxgb3i_ddp_release_gl(gl, ddp->pdev); - } else - ddp_log_error("ddp tag 0x%x, idx 0x%x > max 0x%x.\n", - tag, idx, ddp->nppods); -} - -static int setup_conn_pgidx(struct t3cdev *tdev, unsigned int tid, int pg_idx, - int reply) -{ - struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), - GFP_KERNEL); - struct cpl_set_tcb_field *req; - u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; - - if (!skb) - return -ENOMEM; - - /* set up ulp submode and page size */ - req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); - req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); - req->wr.wr_lo = 0; - OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); - req->reply = V_NO_REPLY(reply ? 0 : 1); - req->cpu_idx = 0; - req->word = htons(31); - req->mask = cpu_to_be64(0xF0000000); - req->val = cpu_to_be64(val << 28); - skb->priority = CPL_PRIORITY_CONTROL; - - cxgb3_ofld_send(tdev, skb); - return 0; -} - -/** - * cxgb3i_setup_conn_host_pagesize - setup the conn.'s ddp page size - * @tdev: t3cdev adapter - * @tid: connection id - * @reply: request reply from h/w - * set up the ddp page size based on the host PAGE_SIZE for a connection - * identified by tid - */ -int cxgb3i_setup_conn_host_pagesize(struct t3cdev *tdev, unsigned int tid, - int reply) -{ - return setup_conn_pgidx(tdev, tid, page_idx, reply); -} - -/** - * cxgb3i_setup_conn_pagesize - setup the conn.'s ddp page size - * @tdev: t3cdev adapter - * @tid: connection id - * @reply: request reply from h/w - * @pgsz: ddp page size - * set up the ddp page size for a connection identified by tid - */ -int cxgb3i_setup_conn_pagesize(struct t3cdev *tdev, unsigned int tid, - int reply, unsigned long pgsz) -{ - int pgidx = cxgb3i_ddp_find_page_index(pgsz); - - return setup_conn_pgidx(tdev, tid, pgidx, reply); -} - -/** - * cxgb3i_setup_conn_digest - setup conn. digest setting - * @tdev: t3cdev adapter - * @tid: connection id - * @hcrc: header digest enabled - * @dcrc: data digest enabled - * @reply: request reply from h/w - * set up the iscsi digest settings for a connection identified by tid - */ -int cxgb3i_setup_conn_digest(struct t3cdev *tdev, unsigned int tid, - int hcrc, int dcrc, int reply) -{ - struct sk_buff *skb = alloc_skb(sizeof(struct cpl_set_tcb_field), - GFP_KERNEL); - struct cpl_set_tcb_field *req; - u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); - - if (!skb) - return -ENOMEM; - - /* set up ulp submode and page size */ - req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); - req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); - req->wr.wr_lo = 0; - OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); - req->reply = V_NO_REPLY(reply ? 0 : 1); - req->cpu_idx = 0; - req->word = htons(31); - req->mask = cpu_to_be64(0x0F000000); - req->val = cpu_to_be64(val << 24); - skb->priority = CPL_PRIORITY_CONTROL; - - cxgb3_ofld_send(tdev, skb); - return 0; -} - - -/** - * cxgb3i_adapter_ddp_info - read the adapter's ddp information - * @tdev: t3cdev adapter - * @tformat: tag format - * @txsz: max tx pdu payload size, filled in by this func. - * @rxsz: max rx pdu payload size, filled in by this func. - * setup the tag format for a given iscsi entity - */ -int cxgb3i_adapter_ddp_info(struct t3cdev *tdev, - struct cxgb3i_tag_format *tformat, - unsigned int *txsz, unsigned int *rxsz) -{ - struct cxgb3i_ddp_info *ddp; - unsigned char idx_bits; - - if (!tformat) - return -EINVAL; - - if (!tdev->ulp_iscsi) - return -EINVAL; - - ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; - - idx_bits = 32 - tformat->sw_bits; - tformat->rsvd_bits = ddp->idx_bits; - tformat->rsvd_shift = PPOD_IDX_SHIFT; - tformat->rsvd_mask = (1 << tformat->rsvd_bits) - 1; - - ddp_log_info("tag format: sw %u, rsvd %u,%u, mask 0x%x.\n", - tformat->sw_bits, tformat->rsvd_bits, - tformat->rsvd_shift, tformat->rsvd_mask); - - *txsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, - ddp->max_txsz - ISCSI_PDU_NONPAYLOAD_LEN); - *rxsz = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, - ddp->max_rxsz - ISCSI_PDU_NONPAYLOAD_LEN); - ddp_log_info("max payload size: %u/%u, %u/%u.\n", - *txsz, ddp->max_txsz, *rxsz, ddp->max_rxsz); - return 0; -} - -/** - * cxgb3i_ddp_cleanup - release the cxgb3 adapter's ddp resource - * @tdev: t3cdev adapter - * release all the resource held by the ddp pagepod manager for a given - * adapter if needed - */ - -static void ddp_cleanup(struct kref *kref) -{ - struct cxgb3i_ddp_info *ddp = container_of(kref, - struct cxgb3i_ddp_info, - refcnt); - int i = 0; - - ddp_log_info("kref release ddp 0x%p, t3dev 0x%p.\n", ddp, ddp->tdev); - - ddp->tdev->ulp_iscsi = NULL; - while (i < ddp->nppods) { - struct cxgb3i_gather_list *gl = ddp->gl_map[i]; - if (gl) { - int npods = (gl->nelem + PPOD_PAGES_MAX - 1) - >> PPOD_PAGES_SHIFT; - ddp_log_info("t3dev 0x%p, ddp %d + %d.\n", - ddp->tdev, i, npods); - kfree(gl); - ddp_free_gl_skb(ddp, i, npods); - i += npods; - } else - i++; - } - cxgb3i_free_big_mem(ddp); -} - -void cxgb3i_ddp_cleanup(struct t3cdev *tdev) -{ - struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; - - ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp); - if (ddp) - kref_put(&ddp->refcnt, ddp_cleanup); -} - -/** - * ddp_init - initialize the cxgb3 adapter's ddp resource - * @tdev: t3cdev adapter - * initialize the ddp pagepod manager for a given adapter - */ -static void ddp_init(struct t3cdev *tdev) -{ - struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; - struct ulp_iscsi_info uinfo; - unsigned int ppmax, bits; - int i, err; - - if (ddp) { - kref_get(&ddp->refcnt); - ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n", - tdev, tdev->ulp_iscsi); - return; - } - - err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); - if (err < 0) { - ddp_log_error("%s, failed to get iscsi param err=%d.\n", - tdev->name, err); - return; - } - - ppmax = (uinfo.ulimit - uinfo.llimit + 1) >> PPOD_SIZE_SHIFT; - bits = __ilog2_u32(ppmax) + 1; - if (bits > PPOD_IDX_MAX_SIZE) - bits = PPOD_IDX_MAX_SIZE; - ppmax = (1 << (bits - 1)) - 1; - - ddp = cxgb3i_alloc_big_mem(sizeof(struct cxgb3i_ddp_info) + - ppmax * - (sizeof(struct cxgb3i_gather_list *) + - sizeof(struct sk_buff *)), - GFP_KERNEL); - if (!ddp) { - ddp_log_warn("%s unable to alloc ddp 0x%d, ddp disabled.\n", - tdev->name, ppmax); - return; - } - ddp->gl_map = (struct cxgb3i_gather_list **)(ddp + 1); - ddp->gl_skb = (struct sk_buff **)(((char *)ddp->gl_map) + - ppmax * - sizeof(struct cxgb3i_gather_list *)); - spin_lock_init(&ddp->map_lock); - kref_init(&ddp->refcnt); - - ddp->tdev = tdev; - ddp->pdev = uinfo.pdev; - ddp->max_txsz = min_t(unsigned int, uinfo.max_txsz, ULP2_MAX_PKT_SIZE); - ddp->max_rxsz = min_t(unsigned int, uinfo.max_rxsz, ULP2_MAX_PKT_SIZE); - ddp->llimit = uinfo.llimit; - ddp->ulimit = uinfo.ulimit; - ddp->nppods = ppmax; - ddp->idx_last = ppmax; - ddp->idx_bits = bits; - ddp->idx_mask = (1 << bits) - 1; - ddp->rsvd_tag_mask = (1 << (bits + PPOD_IDX_SHIFT)) - 1; - - uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; - for (i = 0; i < DDP_PGIDX_MAX; i++) - uinfo.pgsz_factor[i] = ddp_page_order[i]; - uinfo.ulimit = uinfo.llimit + (ppmax << PPOD_SIZE_SHIFT); - - err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); - if (err < 0) { - ddp_log_warn("%s unable to set iscsi param err=%d, " - "ddp disabled.\n", tdev->name, err); - goto free_ddp_map; - } - - tdev->ulp_iscsi = ddp; - - ddp_log_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x pkt %u/%u," - " %u/%u.\n", - tdev, ppmax, ddp->idx_bits, ddp->idx_mask, - ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, - ddp->max_rxsz, uinfo.max_rxsz); - return; - -free_ddp_map: - cxgb3i_free_big_mem(ddp); -} - -/** - * cxgb3i_ddp_init - initialize ddp functions - */ -void cxgb3i_ddp_init(struct t3cdev *tdev) -{ - if (page_idx == DDP_PGIDX_MAX) { - page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE); - - if (page_idx == DDP_PGIDX_MAX) { - ddp_log_info("system PAGE_SIZE %lu, update hw.\n", - PAGE_SIZE); - if (cxgb3i_ddp_adjust_page_table() < 0) { - ddp_log_info("PAGE_SIZE %lu, ddp disabled.\n", - PAGE_SIZE); - return; - } - page_idx = cxgb3i_ddp_find_page_index(PAGE_SIZE); - } - ddp_log_info("system PAGE_SIZE %lu, ddp idx %u.\n", - PAGE_SIZE, page_idx); - } - ddp_init(tdev); -} diff --git a/drivers/scsi/cxgb3i/cxgb3i_ddp.h b/drivers/scsi/cxgb3i/cxgb3i_ddp.h deleted file mode 100644 index 6761b32..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i_ddp.h +++ /dev/null @@ -1,312 +0,0 @@ -/* - * cxgb3i_ddp.h: Chelsio S3xx iSCSI DDP Manager. - * - * Copyright (c) 2008 Chelsio Communications, 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. - * - * Written by: Karen Xie (kxie@xxxxxxxxxxx) - */ - -#ifndef __CXGB3I_ULP2_DDP_H__ -#define __CXGB3I_ULP2_DDP_H__ - -#include <linux/slab.h> -#include <linux/vmalloc.h> - -/** - * struct cxgb3i_tag_format - cxgb3i ulp tag format for an iscsi entity - * - * @sw_bits: # of bits used by iscsi software layer - * @rsvd_bits: # of bits used by h/w - * @rsvd_shift: h/w bits shift left - * @rsvd_mask: reserved bit mask - */ -struct cxgb3i_tag_format { - unsigned char sw_bits; - unsigned char rsvd_bits; - unsigned char rsvd_shift; - unsigned char filler[1]; - u32 rsvd_mask; -}; - -/** - * struct cxgb3i_gather_list - cxgb3i direct data placement memory - * - * @tag: ddp tag - * @length: total data buffer length - * @offset: initial offset to the 1st page - * @nelem: # of pages - * @pages: page pointers - * @phys_addr: physical address - */ -struct cxgb3i_gather_list { - u32 tag; - unsigned int length; - unsigned int offset; - unsigned int nelem; - struct page **pages; - dma_addr_t phys_addr[0]; -}; - -/** - * struct cxgb3i_ddp_info - cxgb3i direct data placement for pdu payload - * - * @list: list head to link elements - * @refcnt: ref. count - * @tdev: pointer to t3cdev used by cxgb3 driver - * @max_txsz: max tx packet size for ddp - * @max_rxsz: max rx packet size for ddp - * @llimit: lower bound of the page pod memory - * @ulimit: upper bound of the page pod memory - * @nppods: # of page pod entries - * @idx_last: page pod entry last used - * @idx_bits: # of bits the pagepod index would take - * @idx_mask: pagepod index mask - * @rsvd_tag_mask: tag mask - * @map_lock: lock to synchonize access to the page pod map - * @gl_map: ddp memory gather list - * @gl_skb: skb used to program the pagepod - */ -struct cxgb3i_ddp_info { - struct list_head list; - struct kref refcnt; - struct t3cdev *tdev; - struct pci_dev *pdev; - unsigned int max_txsz; - unsigned int max_rxsz; - unsigned int llimit; - unsigned int ulimit; - unsigned int nppods; - unsigned int idx_last; - unsigned char idx_bits; - unsigned char filler[3]; - u32 idx_mask; - u32 rsvd_tag_mask; - spinlock_t map_lock; - struct cxgb3i_gather_list **gl_map; - struct sk_buff **gl_skb; -}; - -#define ISCSI_PDU_NONPAYLOAD_LEN 312 /* bhs(48) + ahs(256) + digest(8) */ -#define ULP2_MAX_PKT_SIZE 16224 -#define ULP2_MAX_PDU_PAYLOAD (ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN) -#define PPOD_PAGES_MAX 4 -#define PPOD_PAGES_SHIFT 2 /* 4 pages per pod */ - -/* - * struct pagepod_hdr, pagepod - pagepod format - */ -struct pagepod_hdr { - u32 vld_tid; - u32 pgsz_tag_clr; - u32 maxoffset; - u32 pgoffset; - u64 rsvd; -}; - -struct pagepod { - struct pagepod_hdr hdr; - u64 addr[PPOD_PAGES_MAX + 1]; -}; - -#define PPOD_SIZE sizeof(struct pagepod) /* 64 */ -#define PPOD_SIZE_SHIFT 6 - -#define PPOD_COLOR_SHIFT 0 -#define PPOD_COLOR_SIZE 6 -#define PPOD_COLOR_MASK ((1 << PPOD_COLOR_SIZE) - 1) - -#define PPOD_IDX_SHIFT PPOD_COLOR_SIZE -#define PPOD_IDX_MAX_SIZE 24 - -#define S_PPOD_TID 0 -#define M_PPOD_TID 0xFFFFFF -#define V_PPOD_TID(x) ((x) << S_PPOD_TID) - -#define S_PPOD_VALID 24 -#define V_PPOD_VALID(x) ((x) << S_PPOD_VALID) -#define F_PPOD_VALID V_PPOD_VALID(1U) - -#define S_PPOD_COLOR 0 -#define M_PPOD_COLOR 0x3F -#define V_PPOD_COLOR(x) ((x) << S_PPOD_COLOR) - -#define S_PPOD_TAG 6 -#define M_PPOD_TAG 0xFFFFFF -#define V_PPOD_TAG(x) ((x) << S_PPOD_TAG) - -#define S_PPOD_PGSZ 30 -#define M_PPOD_PGSZ 0x3 -#define V_PPOD_PGSZ(x) ((x) << S_PPOD_PGSZ) - -/* - * large memory chunk allocation/release - * use vmalloc() if kmalloc() fails - */ -static inline void *cxgb3i_alloc_big_mem(unsigned int size, - gfp_t gfp) -{ - void *p = kmalloc(size, gfp); - if (!p) - p = vmalloc(size); - if (p) - memset(p, 0, size); - return p; -} - -static inline void cxgb3i_free_big_mem(void *addr) -{ - if (is_vmalloc_addr(addr)) - vfree(addr); - else - kfree(addr); -} - -/* - * cxgb3i ddp tag are 32 bits, it consists of reserved bits used by h/w and - * non-reserved bits that can be used by the iscsi s/w. - * The reserved bits are identified by the rsvd_bits and rsvd_shift fields - * in struct cxgb3i_tag_format. - * - * The upper most reserved bit can be used to check if a tag is ddp tag or not: - * if the bit is 0, the tag is a valid ddp tag - */ - -/** - * cxgb3i_is_ddp_tag - check if a given tag is a hw/ddp tag - * @tformat: tag format information - * @tag: tag to be checked - * - * return true if the tag is a ddp tag, false otherwise. - */ -static inline int cxgb3i_is_ddp_tag(struct cxgb3i_tag_format *tformat, u32 tag) -{ - return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1))); -} - -/** - * cxgb3i_sw_tag_usable - check if s/w tag has enough bits left for hw bits - * @tformat: tag format information - * @sw_tag: s/w tag to be checked - * - * return true if the tag can be used for hw ddp tag, false otherwise. - */ -static inline int cxgb3i_sw_tag_usable(struct cxgb3i_tag_format *tformat, - u32 sw_tag) -{ - sw_tag >>= (32 - tformat->rsvd_bits); - return !sw_tag; -} - -/** - * cxgb3i_set_non_ddp_tag - mark a given s/w tag as an invalid ddp tag - * @tformat: tag format information - * @sw_tag: s/w tag to be checked - * - * insert 1 at the upper most reserved bit to mark it as an invalid ddp tag. - */ -static inline u32 cxgb3i_set_non_ddp_tag(struct cxgb3i_tag_format *tformat, - u32 sw_tag) -{ - unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; - u32 mask = (1 << shift) - 1; - - if (sw_tag && (sw_tag & ~mask)) { - u32 v1 = sw_tag & ((1 << shift) - 1); - u32 v2 = (sw_tag >> (shift - 1)) << shift; - - return v2 | v1 | 1 << shift; - } - return sw_tag | 1 << shift; -} - -/** - * cxgb3i_ddp_tag_base - shift s/w tag bits so that reserved bits are not used - * @tformat: tag format information - * @sw_tag: s/w tag to be checked - */ -static inline u32 cxgb3i_ddp_tag_base(struct cxgb3i_tag_format *tformat, - u32 sw_tag) -{ - u32 mask = (1 << tformat->rsvd_shift) - 1; - - if (sw_tag && (sw_tag & ~mask)) { - u32 v1 = sw_tag & mask; - u32 v2 = sw_tag >> tformat->rsvd_shift; - - v2 <<= tformat->rsvd_shift + tformat->rsvd_bits; - return v2 | v1; - } - return sw_tag; -} - -/** - * cxgb3i_tag_rsvd_bits - get the reserved bits used by the h/w - * @tformat: tag format information - * @tag: tag to be checked - * - * return the reserved bits in the tag - */ -static inline u32 cxgb3i_tag_rsvd_bits(struct cxgb3i_tag_format *tformat, - u32 tag) -{ - if (cxgb3i_is_ddp_tag(tformat, tag)) - return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask; - return 0; -} - -/** - * cxgb3i_tag_nonrsvd_bits - get the non-reserved bits used by the s/w - * @tformat: tag format information - * @tag: tag to be checked - * - * return the non-reserved bits in the tag. - */ -static inline u32 cxgb3i_tag_nonrsvd_bits(struct cxgb3i_tag_format *tformat, - u32 tag) -{ - unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1; - u32 v1, v2; - - if (cxgb3i_is_ddp_tag(tformat, tag)) { - v1 = tag & ((1 << tformat->rsvd_shift) - 1); - v2 = (tag >> (shift + 1)) << tformat->rsvd_shift; - } else { - u32 mask = (1 << shift) - 1; - - tag &= ~(1 << shift); - v1 = tag & mask; - v2 = (tag >> 1) & ~mask; - } - return v1 | v2; -} - -int cxgb3i_ddp_tag_reserve(struct t3cdev *, unsigned int tid, - struct cxgb3i_tag_format *, u32 *tag, - struct cxgb3i_gather_list *, gfp_t gfp); -void cxgb3i_ddp_tag_release(struct t3cdev *, u32 tag); - -struct cxgb3i_gather_list *cxgb3i_ddp_make_gl(unsigned int xferlen, - struct scatterlist *sgl, - unsigned int sgcnt, - struct pci_dev *pdev, - gfp_t gfp); -void cxgb3i_ddp_release_gl(struct cxgb3i_gather_list *gl, - struct pci_dev *pdev); - -int cxgb3i_setup_conn_host_pagesize(struct t3cdev *, unsigned int tid, - int reply); -int cxgb3i_setup_conn_pagesize(struct t3cdev *, unsigned int tid, int reply, - unsigned long pgsz); -int cxgb3i_setup_conn_digest(struct t3cdev *, unsigned int tid, - int hcrc, int dcrc, int reply); -int cxgb3i_ddp_find_page_index(unsigned long pgsz); -int cxgb3i_adapter_ddp_info(struct t3cdev *, struct cxgb3i_tag_format *, - unsigned int *txsz, unsigned int *rxsz); - -void cxgb3i_ddp_init(struct t3cdev *); -void cxgb3i_ddp_cleanup(struct t3cdev *); -#endif diff --git a/drivers/scsi/cxgb3i/cxgb3i_init.c b/drivers/scsi/cxgb3i/cxgb3i_init.c deleted file mode 100644 index 685af36..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i_init.c +++ /dev/null @@ -1,132 +0,0 @@ -/* cxgb3i_init.c: Chelsio S3xx iSCSI driver. - * - * Copyright (c) 2008 Chelsio Communications, 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. - * - * Written by: Karen Xie (kxie@xxxxxxxxxxx) - */ - -#include "cxgb3i.h" - -#define DRV_MODULE_NAME "cxgb3i" -#define DRV_MODULE_VERSION "1.0.2" -#define DRV_MODULE_RELDATE "Mar. 2009" - -static char version[] = - "Chelsio S3xx iSCSI Driver " DRV_MODULE_NAME - " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; - -MODULE_AUTHOR("Karen Xie <kxie@xxxxxxxxxxx>"); -MODULE_DESCRIPTION("Chelsio S3xx iSCSI Driver"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_MODULE_VERSION); - -static void open_s3_dev(struct t3cdev *); -static void close_s3_dev(struct t3cdev *); -static void s3_event_handler(struct t3cdev *tdev, u32 event, u32 port); - -static cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS]; -static struct cxgb3_client t3c_client = { - .name = "iscsi_cxgb3", - .handlers = cxgb3i_cpl_handlers, - .add = open_s3_dev, - .remove = close_s3_dev, - .event_handler = s3_event_handler, -}; - -/** - * open_s3_dev - register with cxgb3 LLD - * @t3dev: cxgb3 adapter instance - */ -static void open_s3_dev(struct t3cdev *t3dev) -{ - static int vers_printed; - - if (!vers_printed) { - printk(KERN_INFO "%s", version); - vers_printed = 1; - } - - cxgb3i_ddp_init(t3dev); - cxgb3i_sdev_add(t3dev, &t3c_client); - cxgb3i_adapter_open(t3dev); -} - -/** - * close_s3_dev - de-register with cxgb3 LLD - * @t3dev: cxgb3 adapter instance - */ -static void close_s3_dev(struct t3cdev *t3dev) -{ - cxgb3i_adapter_close(t3dev); - cxgb3i_sdev_remove(t3dev); - cxgb3i_ddp_cleanup(t3dev); -} - -static void s3_event_handler(struct t3cdev *tdev, u32 event, u32 port) -{ - struct cxgb3i_adapter *snic = cxgb3i_adapter_find_by_tdev(tdev); - - cxgb3i_log_info("snic 0x%p, tdev 0x%p, event 0x%x, port 0x%x.\n", - snic, tdev, event, port); - if (!snic) - return; - - switch (event) { - case OFFLOAD_STATUS_DOWN: - snic->flags |= CXGB3I_ADAPTER_FLAG_RESET; - break; - case OFFLOAD_STATUS_UP: - snic->flags &= ~CXGB3I_ADAPTER_FLAG_RESET; - break; - } -} - -/** - * cxgb3i_init_module - module init entry point - * - * initialize any driver wide global data structures and register itself - * with the cxgb3 module - */ -static int __init cxgb3i_init_module(void) -{ - int err; - - err = cxgb3i_sdev_init(cxgb3i_cpl_handlers); - if (err < 0) - return err; - - err = cxgb3i_iscsi_init(); - if (err < 0) - return err; - - err = cxgb3i_pdu_init(); - if (err < 0) { - cxgb3i_iscsi_cleanup(); - return err; - } - - cxgb3_register_client(&t3c_client); - - return 0; -} - -/** - * cxgb3i_exit_module - module cleanup/exit entry point - * - * go through the driver hba list and for each hba, release any resource held. - * and unregisters iscsi transport and the cxgb3 module - */ -static void __exit cxgb3i_exit_module(void) -{ - cxgb3_unregister_client(&t3c_client); - cxgb3i_pdu_cleanup(); - cxgb3i_iscsi_cleanup(); - cxgb3i_sdev_cleanup(); -} - -module_init(cxgb3i_init_module); -module_exit(cxgb3i_exit_module); diff --git a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c b/drivers/scsi/cxgb3i/cxgb3i_iscsi.c deleted file mode 100644 index 7b686ab..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i_iscsi.c +++ /dev/null @@ -1,1018 +0,0 @@ -/* cxgb3i_iscsi.c: Chelsio S3xx iSCSI driver. - * - * Copyright (c) 2008 Chelsio Communications, Inc. - * Copyright (c) 2008 Mike Christie - * Copyright (c) 2008 Red Hat, Inc. All rights reserved. - * - * 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. - * - * Written by: Karen Xie (kxie@xxxxxxxxxxx) - */ - -#include <linux/inet.h> -#include <linux/slab.h> -#include <linux/crypto.h> -#include <linux/if_vlan.h> -#include <net/dst.h> -#include <net/tcp.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_device.h> -#include <scsi/scsi_eh.h> -#include <scsi/scsi_host.h> -#include <scsi/scsi.h> -#include <scsi/iscsi_proto.h> -#include <scsi/libiscsi.h> -#include <scsi/scsi_transport_iscsi.h> - -#include "cxgb3i.h" -#include "cxgb3i_pdu.h" - -#ifdef __DEBUG_CXGB3I_TAG__ -#define cxgb3i_tag_debug cxgb3i_log_debug -#else -#define cxgb3i_tag_debug(fmt...) -#endif - -#ifdef __DEBUG_CXGB3I_API__ -#define cxgb3i_api_debug cxgb3i_log_debug -#else -#define cxgb3i_api_debug(fmt...) -#endif - -/* - * align pdu size to multiple of 512 for better performance - */ -#define align_pdu_size(n) do { n = (n) & (~511); } while (0) - -static struct scsi_transport_template *cxgb3i_scsi_transport; -static struct scsi_host_template cxgb3i_host_template; -static struct iscsi_transport cxgb3i_iscsi_transport; -static unsigned char sw_tag_idx_bits; -static unsigned char sw_tag_age_bits; - -static LIST_HEAD(cxgb3i_snic_list); -static DEFINE_RWLOCK(cxgb3i_snic_rwlock); - -/** - * cxgb3i_adpater_find_by_tdev - find the cxgb3i_adapter structure via t3cdev - * @tdev: t3cdev pointer - */ -struct cxgb3i_adapter *cxgb3i_adapter_find_by_tdev(struct t3cdev *tdev) -{ - struct cxgb3i_adapter *snic; - - read_lock(&cxgb3i_snic_rwlock); - list_for_each_entry(snic, &cxgb3i_snic_list, list_head) { - if (snic->tdev == tdev) { - read_unlock(&cxgb3i_snic_rwlock); - return snic; - } - } - read_unlock(&cxgb3i_snic_rwlock); - return NULL; -} - -static inline int adapter_update(struct cxgb3i_adapter *snic) -{ - cxgb3i_log_info("snic 0x%p, t3dev 0x%p, updating.\n", - snic, snic->tdev); - return cxgb3i_adapter_ddp_info(snic->tdev, &snic->tag_format, - &snic->tx_max_size, - &snic->rx_max_size); -} - -static int adapter_add(struct cxgb3i_adapter *snic) -{ - struct t3cdev *t3dev = snic->tdev; - struct adapter *adapter = tdev2adap(t3dev); - int i, err; - - snic->pdev = adapter->pdev; - snic->tag_format.sw_bits = sw_tag_idx_bits + sw_tag_age_bits; - - err = cxgb3i_adapter_ddp_info(t3dev, &snic->tag_format, - &snic->tx_max_size, - &snic->rx_max_size); - if (err < 0) - return err; - - for_each_port(adapter, i) { - snic->hba[i] = cxgb3i_hba_host_add(snic, adapter->port[i]); - if (!snic->hba[i]) - return -EINVAL; - } - snic->hba_cnt = adapter->params.nports; - - /* add to the list */ - write_lock(&cxgb3i_snic_rwlock); - list_add_tail(&snic->list_head, &cxgb3i_snic_list); - write_unlock(&cxgb3i_snic_rwlock); - - cxgb3i_log_info("t3dev 0x%p open, snic 0x%p, %u scsi hosts added.\n", - t3dev, snic, snic->hba_cnt); - return 0; -} - -/** - * cxgb3i_adapter_open - init a s3 adapter structure and any h/w settings - * @t3dev: t3cdev adapter - */ -void cxgb3i_adapter_open(struct t3cdev *t3dev) -{ - struct cxgb3i_adapter *snic = cxgb3i_adapter_find_by_tdev(t3dev); - int err; - - if (snic) - err = adapter_update(snic); - else { - snic = kzalloc(sizeof(*snic), GFP_KERNEL); - if (snic) { - spin_lock_init(&snic->lock); - snic->tdev = t3dev; - err = adapter_add(snic); - } else - err = -ENOMEM; - } - - if (err < 0) { - cxgb3i_log_info("snic 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n", - snic, snic ? snic->flags : 0, t3dev, err); - if (snic) { - snic->flags &= ~CXGB3I_ADAPTER_FLAG_RESET; - cxgb3i_adapter_close(t3dev); - } - } -} - -/** - * cxgb3i_adapter_close - release the resources held and cleanup h/w settings - * @t3dev: t3cdev adapter - */ -void cxgb3i_adapter_close(struct t3cdev *t3dev) -{ - struct cxgb3i_adapter *snic = cxgb3i_adapter_find_by_tdev(t3dev); - int i; - - if (!snic || snic->flags & CXGB3I_ADAPTER_FLAG_RESET) { - cxgb3i_log_info("t3dev 0x%p close, snic 0x%p, f 0x%x.\n", - t3dev, snic, snic ? snic->flags : 0); - return; - } - - /* remove from the list */ - write_lock(&cxgb3i_snic_rwlock); - list_del(&snic->list_head); - write_unlock(&cxgb3i_snic_rwlock); - - for (i = 0; i < snic->hba_cnt; i++) { - if (snic->hba[i]) { - cxgb3i_hba_host_remove(snic->hba[i]); - snic->hba[i] = NULL; - } - } - cxgb3i_log_info("t3dev 0x%p close, snic 0x%p, %u scsi hosts removed.\n", - t3dev, snic, snic->hba_cnt); - kfree(snic); -} - -/** - * cxgb3i_hba_find_by_netdev - find the cxgb3i_hba structure via net_device - * @t3dev: t3cdev adapter - */ -static struct cxgb3i_hba *cxgb3i_hba_find_by_netdev(struct net_device *ndev) -{ - struct cxgb3i_adapter *snic; - int i; - - if (ndev->priv_flags & IFF_802_1Q_VLAN) - ndev = vlan_dev_real_dev(ndev); - - read_lock(&cxgb3i_snic_rwlock); - list_for_each_entry(snic, &cxgb3i_snic_list, list_head) { - for (i = 0; i < snic->hba_cnt; i++) { - if (snic->hba[i]->ndev == ndev) { - read_unlock(&cxgb3i_snic_rwlock); - return snic->hba[i]; - } - } - } - read_unlock(&cxgb3i_snic_rwlock); - return NULL; -} - -/** - * cxgb3i_hba_host_add - register a new host with scsi/iscsi - * @snic: the cxgb3i adapter - * @ndev: associated net_device - */ -struct cxgb3i_hba *cxgb3i_hba_host_add(struct cxgb3i_adapter *snic, - struct net_device *ndev) -{ - struct cxgb3i_hba *hba; - struct Scsi_Host *shost; - int err; - - shost = iscsi_host_alloc(&cxgb3i_host_template, - sizeof(struct cxgb3i_hba), 1); - if (!shost) { - cxgb3i_log_info("snic 0x%p, ndev 0x%p, host_alloc failed.\n", - snic, ndev); - return NULL; - } - - shost->transportt = cxgb3i_scsi_transport; - shost->max_lun = CXGB3I_MAX_LUN; - shost->max_id = CXGB3I_MAX_TARGET; - shost->max_channel = 0; - shost->max_cmd_len = 16; - - hba = iscsi_host_priv(shost); - hba->snic = snic; - hba->ndev = ndev; - hba->shost = shost; - - pci_dev_get(snic->pdev); - err = iscsi_host_add(shost, &snic->pdev->dev); - if (err) { - cxgb3i_log_info("snic 0x%p, ndev 0x%p, host_add failed.\n", - snic, ndev); - goto pci_dev_put; - } - - cxgb3i_api_debug("shost 0x%p, hba 0x%p, no %u.\n", - shost, hba, shost->host_no); - - return hba; - -pci_dev_put: - pci_dev_put(snic->pdev); - scsi_host_put(shost); - return NULL; -} - -/** - * cxgb3i_hba_host_remove - de-register the host with scsi/iscsi - * @hba: the cxgb3i hba - */ -void cxgb3i_hba_host_remove(struct cxgb3i_hba *hba) -{ - cxgb3i_api_debug("shost 0x%p, hba 0x%p, no %u.\n", - hba->shost, hba, hba->shost->host_no); - iscsi_host_remove(hba->shost); - pci_dev_put(hba->snic->pdev); - iscsi_host_free(hba->shost); -} - -/** - * cxgb3i_ep_connect - establish TCP connection to target portal - * @shost: scsi host to use - * @dst_addr: target IP address - * @non_blocking: blocking or non-blocking call - * - * Initiates a TCP/IP connection to the dst_addr - */ -static struct iscsi_endpoint *cxgb3i_ep_connect(struct Scsi_Host *shost, - struct sockaddr *dst_addr, - int non_blocking) -{ - struct iscsi_endpoint *ep; - struct cxgb3i_endpoint *cep; - struct cxgb3i_hba *hba = NULL; - struct s3_conn *c3cn = NULL; - int err = 0; - - if (shost) - hba = iscsi_host_priv(shost); - - cxgb3i_api_debug("shost 0x%p, hba 0x%p.\n", shost, hba); - - c3cn = cxgb3i_c3cn_create(); - if (!c3cn) { - cxgb3i_log_info("ep connect OOM.\n"); - err = -ENOMEM; - goto release_conn; - } - - err = cxgb3i_c3cn_connect(hba ? hba->ndev : NULL, c3cn, - (struct sockaddr_in *)dst_addr); - if (err < 0) { - cxgb3i_log_info("ep connect failed.\n"); - goto release_conn; - } - - hba = cxgb3i_hba_find_by_netdev(c3cn->dst_cache->dev); - if (!hba) { - err = -ENOSPC; - cxgb3i_log_info("NOT going through cxgbi device.\n"); - goto release_conn; - } - - if (shost && hba != iscsi_host_priv(shost)) { - err = -ENOSPC; - cxgb3i_log_info("Could not connect through request host%u\n", - shost->host_no); - goto release_conn; - } - - if (c3cn_is_closing(c3cn)) { - err = -ENOSPC; - cxgb3i_log_info("ep connect unable to connect.\n"); - goto release_conn; - } - - ep = iscsi_create_endpoint(sizeof(*cep)); - if (!ep) { - err = -ENOMEM; - cxgb3i_log_info("iscsi alloc ep, OOM.\n"); - goto release_conn; - } - cep = ep->dd_data; - cep->c3cn = c3cn; - cep->hba = hba; - - cxgb3i_api_debug("ep 0x%p, 0x%p, c3cn 0x%p, hba 0x%p.\n", - ep, cep, c3cn, hba); - return ep; - -release_conn: - cxgb3i_api_debug("conn 0x%p failed, release.\n", c3cn); - if (c3cn) - cxgb3i_c3cn_release(c3cn); - return ERR_PTR(err); -} - -/** - * cxgb3i_ep_poll - polls for TCP connection establishement - * @ep: TCP connection (endpoint) handle - * @timeout_ms: timeout value in milli secs - * - * polls for TCP connect request to complete - */ -static int cxgb3i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) -{ - struct cxgb3i_endpoint *cep = ep->dd_data; - struct s3_conn *c3cn = cep->c3cn; - - if (!c3cn_is_established(c3cn)) - return 0; - cxgb3i_api_debug("ep 0x%p, c3cn 0x%p established.\n", ep, c3cn); - return 1; -} - -/** - * cxgb3i_ep_disconnect - teardown TCP connection - * @ep: TCP connection (endpoint) handle - * - * teardown TCP connection - */ -static void cxgb3i_ep_disconnect(struct iscsi_endpoint *ep) -{ - struct cxgb3i_endpoint *cep = ep->dd_data; - struct cxgb3i_conn *cconn = cep->cconn; - - cxgb3i_api_debug("ep 0x%p, cep 0x%p.\n", ep, cep); - - if (cconn && cconn->conn) { - /* - * stop the xmit path so the xmit_pdu function is - * not being called - */ - iscsi_suspend_tx(cconn->conn); - - write_lock_bh(&cep->c3cn->callback_lock); - cep->c3cn->user_data = NULL; - cconn->cep = NULL; - write_unlock_bh(&cep->c3cn->callback_lock); - } - - cxgb3i_api_debug("ep 0x%p, cep 0x%p, release c3cn 0x%p.\n", - ep, cep, cep->c3cn); - cxgb3i_c3cn_release(cep->c3cn); - iscsi_destroy_endpoint(ep); -} - -/** - * cxgb3i_session_create - create a new iscsi session - * @cmds_max: max # of commands - * @qdepth: scsi queue depth - * @initial_cmdsn: initial iscsi CMDSN for this session - * - * Creates a new iSCSI session - */ -static struct iscsi_cls_session * -cxgb3i_session_create(struct iscsi_endpoint *ep, u16 cmds_max, u16 qdepth, - u32 initial_cmdsn) -{ - struct cxgb3i_endpoint *cep; - struct cxgb3i_hba *hba; - struct Scsi_Host *shost; - struct iscsi_cls_session *cls_session; - struct iscsi_session *session; - - if (!ep) { - cxgb3i_log_error("%s, missing endpoint.\n", __func__); - return NULL; - } - - cep = ep->dd_data; - hba = cep->hba; - shost = hba->shost; - cxgb3i_api_debug("ep 0x%p, cep 0x%p, hba 0x%p.\n", ep, cep, hba); - BUG_ON(hba != iscsi_host_priv(shost)); - - cls_session = iscsi_session_setup(&cxgb3i_iscsi_transport, shost, - cmds_max, 0, - sizeof(struct iscsi_tcp_task) + - sizeof(struct cxgb3i_task_data), - initial_cmdsn, ISCSI_MAX_TARGET); - if (!cls_session) - return NULL; - session = cls_session->dd_data; - if (iscsi_tcp_r2tpool_alloc(session)) - goto remove_session; - - return cls_session; - -remove_session: - iscsi_session_teardown(cls_session); - return NULL; -} - -/** - * cxgb3i_session_destroy - destroys iscsi session - * @cls_session: pointer to iscsi cls session - * - * Destroys an iSCSI session instance and releases its all resources held - */ -static void cxgb3i_session_destroy(struct iscsi_cls_session *cls_session) -{ - cxgb3i_api_debug("sess 0x%p.\n", cls_session); - iscsi_tcp_r2tpool_free(cls_session->dd_data); - iscsi_session_teardown(cls_session); -} - -/** - * cxgb3i_conn_max_xmit_dlength -- calc the max. xmit pdu segment size - * @conn: iscsi connection - * check the max. xmit pdu payload, reduce it if needed - */ -static inline int cxgb3i_conn_max_xmit_dlength(struct iscsi_conn *conn) - -{ - struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct cxgb3i_conn *cconn = tcp_conn->dd_data; - unsigned int max = max(512 * MAX_SKB_FRAGS, SKB_TX_HEADROOM); - - max = min(cconn->hba->snic->tx_max_size, max); - if (conn->max_xmit_dlength) - conn->max_xmit_dlength = min(conn->max_xmit_dlength, max); - else - conn->max_xmit_dlength = max; - align_pdu_size(conn->max_xmit_dlength); - cxgb3i_api_debug("conn 0x%p, max xmit %u.\n", - conn, conn->max_xmit_dlength); - return 0; -} - -/** - * cxgb3i_conn_max_recv_dlength -- check the max. recv pdu segment size - * @conn: iscsi connection - * return 0 if the value is valid, < 0 otherwise. - */ -static inline int cxgb3i_conn_max_recv_dlength(struct iscsi_conn *conn) -{ - struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct cxgb3i_conn *cconn = tcp_conn->dd_data; - unsigned int max = cconn->hba->snic->rx_max_size; - - align_pdu_size(max); - if (conn->max_recv_dlength) { - if (conn->max_recv_dlength > max) { - cxgb3i_log_error("MaxRecvDataSegmentLength %u too big." - " Need to be <= %u.\n", - conn->max_recv_dlength, max); - return -EINVAL; - } - conn->max_recv_dlength = min(conn->max_recv_dlength, max); - align_pdu_size(conn->max_recv_dlength); - } else - conn->max_recv_dlength = max; - cxgb3i_api_debug("conn 0x%p, max recv %u.\n", - conn, conn->max_recv_dlength); - return 0; -} - -/** - * cxgb3i_conn_create - create iscsi connection instance - * @cls_session: pointer to iscsi cls session - * @cid: iscsi cid - * - * Creates a new iSCSI connection instance for a given session - */ -static struct iscsi_cls_conn *cxgb3i_conn_create(struct iscsi_cls_session - *cls_session, u32 cid) -{ - struct iscsi_cls_conn *cls_conn; - struct iscsi_conn *conn; - struct iscsi_tcp_conn *tcp_conn; - struct cxgb3i_conn *cconn; - - cxgb3i_api_debug("sess 0x%p, cid %u.\n", cls_session, cid); - - cls_conn = iscsi_tcp_conn_setup(cls_session, sizeof(*cconn), cid); - if (!cls_conn) - return NULL; - conn = cls_conn->dd_data; - tcp_conn = conn->dd_data; - cconn = tcp_conn->dd_data; - - cconn->conn = conn; - return cls_conn; -} - -/** - * cxgb3i_conn_bind - binds iscsi sess, conn and endpoint together - * @cls_session: pointer to iscsi cls session - * @cls_conn: pointer to iscsi cls conn - * @transport_eph: 64-bit EP handle - * @is_leading: leading connection on this session? - * - * Binds together an iSCSI session, an iSCSI connection and a - * TCP connection. This routine returns error code if the TCP - * connection does not belong on the device iSCSI sess/conn is bound - */ - -static int cxgb3i_conn_bind(struct iscsi_cls_session *cls_session, - struct iscsi_cls_conn *cls_conn, - u64 transport_eph, int is_leading) -{ - struct iscsi_conn *conn = cls_conn->dd_data; - struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct cxgb3i_conn *cconn = tcp_conn->dd_data; - struct cxgb3i_adapter *snic; - struct iscsi_endpoint *ep; - struct cxgb3i_endpoint *cep; - struct s3_conn *c3cn; - int err; - - ep = iscsi_lookup_endpoint(transport_eph); - if (!ep) - return -EINVAL; - - /* setup ddp pagesize */ - cep = ep->dd_data; - c3cn = cep->c3cn; - snic = cep->hba->snic; - err = cxgb3i_setup_conn_host_pagesize(snic->tdev, c3cn->tid, 0); - if (err < 0) - return err; - - cxgb3i_api_debug("ep 0x%p, cls sess 0x%p, cls conn 0x%p.\n", - ep, cls_session, cls_conn); - - err = iscsi_conn_bind(cls_session, cls_conn, is_leading); - if (err) - return -EINVAL; - - /* calculate the tag idx bits needed for this conn based on cmds_max */ - cconn->task_idx_bits = (__ilog2_u32(conn->session->cmds_max - 1)) + 1; - cxgb3i_api_debug("session cmds_max 0x%x, bits %u.\n", - conn->session->cmds_max, cconn->task_idx_bits); - - read_lock(&c3cn->callback_lock); - c3cn->user_data = conn; - cconn->hba = cep->hba; - cconn->cep = cep; - cep->cconn = cconn; - read_unlock(&c3cn->callback_lock); - - cxgb3i_conn_max_xmit_dlength(conn); - cxgb3i_conn_max_recv_dlength(conn); - - spin_lock_bh(&conn->session->lock); - sprintf(conn->portal_address, "%pI4", &c3cn->daddr.sin_addr.s_addr); - conn->portal_port = ntohs(c3cn->daddr.sin_port); - spin_unlock_bh(&conn->session->lock); - - /* init recv engine */ - iscsi_tcp_hdr_recv_prep(tcp_conn); - - return 0; -} - -/** - * cxgb3i_conn_get_param - return iscsi connection parameter to caller - * @cls_conn: pointer to iscsi cls conn - * @param: parameter type identifier - * @buf: buffer pointer - * - * returns iSCSI connection parameters - */ -static int cxgb3i_conn_get_param(struct iscsi_cls_conn *cls_conn, - enum iscsi_param param, char *buf) -{ - struct iscsi_conn *conn = cls_conn->dd_data; - int len; - - cxgb3i_api_debug("cls_conn 0x%p, param %d.\n", cls_conn, param); - - switch (param) { - case ISCSI_PARAM_CONN_PORT: - spin_lock_bh(&conn->session->lock); - len = sprintf(buf, "%hu\n", conn->portal_port); - spin_unlock_bh(&conn->session->lock); - break; - case ISCSI_PARAM_CONN_ADDRESS: - spin_lock_bh(&conn->session->lock); - len = sprintf(buf, "%s\n", conn->portal_address); - spin_unlock_bh(&conn->session->lock); - break; - default: - return iscsi_conn_get_param(cls_conn, param, buf); - } - - return len; -} - -/** - * cxgb3i_conn_set_param - set iscsi connection parameter - * @cls_conn: pointer to iscsi cls conn - * @param: parameter type identifier - * @buf: buffer pointer - * @buflen: buffer length - * - * set iSCSI connection parameters - */ -static int cxgb3i_conn_set_param(struct iscsi_cls_conn *cls_conn, - enum iscsi_param param, char *buf, int buflen) -{ - struct iscsi_conn *conn = cls_conn->dd_data; - struct iscsi_session *session = conn->session; - struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct cxgb3i_conn *cconn = tcp_conn->dd_data; - struct cxgb3i_adapter *snic = cconn->hba->snic; - struct s3_conn *c3cn = cconn->cep->c3cn; - int value, err = 0; - - switch (param) { - case ISCSI_PARAM_HDRDGST_EN: - err = iscsi_set_param(cls_conn, param, buf, buflen); - if (!err && conn->hdrdgst_en) - err = cxgb3i_setup_conn_digest(snic->tdev, c3cn->tid, - conn->hdrdgst_en, - conn->datadgst_en, 0); - break; - case ISCSI_PARAM_DATADGST_EN: - err = iscsi_set_param(cls_conn, param, buf, buflen); - if (!err && conn->datadgst_en) - err = cxgb3i_setup_conn_digest(snic->tdev, c3cn->tid, - conn->hdrdgst_en, - conn->datadgst_en, 0); - break; - case ISCSI_PARAM_MAX_R2T: - sscanf(buf, "%d", &value); - if (value <= 0 || !is_power_of_2(value)) - return -EINVAL; - if (session->max_r2t == value) - break; - iscsi_tcp_r2tpool_free(session); - err = iscsi_set_param(cls_conn, param, buf, buflen); - if (!err && iscsi_tcp_r2tpool_alloc(session)) - return -ENOMEM; - case ISCSI_PARAM_MAX_RECV_DLENGTH: - err = iscsi_set_param(cls_conn, param, buf, buflen); - if (!err) - err = cxgb3i_conn_max_recv_dlength(conn); - break; - case ISCSI_PARAM_MAX_XMIT_DLENGTH: - err = iscsi_set_param(cls_conn, param, buf, buflen); - if (!err) - err = cxgb3i_conn_max_xmit_dlength(conn); - break; - default: - return iscsi_set_param(cls_conn, param, buf, buflen); - } - return err; -} - -/** - * cxgb3i_host_set_param - configure host (adapter) related parameters - * @shost: scsi host pointer - * @param: parameter type identifier - * @buf: buffer pointer - */ -static int cxgb3i_host_set_param(struct Scsi_Host *shost, - enum iscsi_host_param param, - char *buf, int buflen) -{ - struct cxgb3i_hba *hba = iscsi_host_priv(shost); - - if (!hba->ndev) { - shost_printk(KERN_ERR, shost, "Could not set host param. " - "Netdev for host not set.\n"); - return -ENODEV; - } - - cxgb3i_api_debug("param %d, buf %s.\n", param, buf); - - switch (param) { - case ISCSI_HOST_PARAM_IPADDRESS: - { - __be32 addr = in_aton(buf); - cxgb3i_set_private_ipv4addr(hba->ndev, addr); - return 0; - } - case ISCSI_HOST_PARAM_HWADDRESS: - case ISCSI_HOST_PARAM_NETDEV_NAME: - /* ignore */ - return 0; - default: - return iscsi_host_set_param(shost, param, buf, buflen); - } -} - -/** - * cxgb3i_host_get_param - returns host (adapter) related parameters - * @shost: scsi host pointer - * @param: parameter type identifier - * @buf: buffer pointer - */ -static int cxgb3i_host_get_param(struct Scsi_Host *shost, - enum iscsi_host_param param, char *buf) -{ - struct cxgb3i_hba *hba = iscsi_host_priv(shost); - int len = 0; - - if (!hba->ndev) { - shost_printk(KERN_ERR, shost, "Could not set host param. " - "Netdev for host not set.\n"); - return -ENODEV; - } - - cxgb3i_api_debug("hba %s, param %d.\n", hba->ndev->name, param); - - switch (param) { - case ISCSI_HOST_PARAM_HWADDRESS: - len = sysfs_format_mac(buf, hba->ndev->dev_addr, 6); - break; - case ISCSI_HOST_PARAM_NETDEV_NAME: - len = sprintf(buf, "%s\n", hba->ndev->name); - break; - case ISCSI_HOST_PARAM_IPADDRESS: - { - __be32 addr; - - addr = cxgb3i_get_private_ipv4addr(hba->ndev); - len = sprintf(buf, "%pI4", &addr); - break; - } - default: - return iscsi_host_get_param(shost, param, buf); - } - return len; -} - -/** - * cxgb3i_conn_get_stats - returns iSCSI stats - * @cls_conn: pointer to iscsi cls conn - * @stats: pointer to iscsi statistic struct - */ -static void cxgb3i_conn_get_stats(struct iscsi_cls_conn *cls_conn, - struct iscsi_stats *stats) -{ - struct iscsi_conn *conn = cls_conn->dd_data; - - stats->txdata_octets = conn->txdata_octets; - stats->rxdata_octets = conn->rxdata_octets; - stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; - stats->dataout_pdus = conn->dataout_pdus_cnt; - stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; - stats->datain_pdus = conn->datain_pdus_cnt; - stats->r2t_pdus = conn->r2t_pdus_cnt; - stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; - stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; - stats->digest_err = 0; - stats->timeout_err = 0; - stats->custom_length = 1; - strcpy(stats->custom[0].desc, "eh_abort_cnt"); - stats->custom[0].value = conn->eh_abort_cnt; -} - -/** - * cxgb3i_parse_itt - get the idx and age bits from a given tag - * @conn: iscsi connection - * @itt: itt tag - * @idx: task index, filled in by this function - * @age: session age, filled in by this function - */ -static void cxgb3i_parse_itt(struct iscsi_conn *conn, itt_t itt, - int *idx, int *age) -{ - struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct cxgb3i_conn *cconn = tcp_conn->dd_data; - struct cxgb3i_adapter *snic = cconn->hba->snic; - u32 tag = ntohl((__force u32) itt); - u32 sw_bits; - - sw_bits = cxgb3i_tag_nonrsvd_bits(&snic->tag_format, tag); - if (idx) - *idx = sw_bits & ((1 << cconn->task_idx_bits) - 1); - if (age) - *age = (sw_bits >> cconn->task_idx_bits) & ISCSI_AGE_MASK; - - cxgb3i_tag_debug("parse tag 0x%x/0x%x, sw 0x%x, itt 0x%x, age 0x%x.\n", - tag, itt, sw_bits, idx ? *idx : 0xFFFFF, - age ? *age : 0xFF); -} - -/** - * cxgb3i_reserve_itt - generate tag for a give task - * @task: iscsi task - * @hdr_itt: tag, filled in by this function - * Set up ddp for scsi read tasks if possible. - */ -int cxgb3i_reserve_itt(struct iscsi_task *task, itt_t *hdr_itt) -{ - struct scsi_cmnd *sc = task->sc; - struct iscsi_conn *conn = task->conn; - struct iscsi_session *sess = conn->session; - struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct cxgb3i_conn *cconn = tcp_conn->dd_data; - struct cxgb3i_adapter *snic = cconn->hba->snic; - struct cxgb3i_tag_format *tformat = &snic->tag_format; - u32 sw_tag = (sess->age << cconn->task_idx_bits) | task->itt; - u32 tag; - int err = -EINVAL; - - if (sc && - (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) && - cxgb3i_sw_tag_usable(tformat, sw_tag)) { - struct s3_conn *c3cn = cconn->cep->c3cn; - struct cxgb3i_gather_list *gl; - - gl = cxgb3i_ddp_make_gl(scsi_in(sc)->length, - scsi_in(sc)->table.sgl, - scsi_in(sc)->table.nents, - snic->pdev, - GFP_ATOMIC); - if (gl) { - tag = sw_tag; - err = cxgb3i_ddp_tag_reserve(snic->tdev, c3cn->tid, - tformat, &tag, - gl, GFP_ATOMIC); - if (err < 0) - cxgb3i_ddp_release_gl(gl, snic->pdev); - } - } - - if (err < 0) - tag = cxgb3i_set_non_ddp_tag(tformat, sw_tag); - /* the itt need to sent in big-endian order */ - *hdr_itt = (__force itt_t)htonl(tag); - - cxgb3i_tag_debug("new tag 0x%x/0x%x (itt 0x%x, age 0x%x).\n", - tag, *hdr_itt, task->itt, sess->age); - return 0; -} - -/** - * cxgb3i_release_itt - release the tag for a given task - * @task: iscsi task - * @hdr_itt: tag - * If the tag is a ddp tag, release the ddp setup - */ -void cxgb3i_release_itt(struct iscsi_task *task, itt_t hdr_itt) -{ - struct scsi_cmnd *sc = task->sc; - struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; - struct cxgb3i_conn *cconn = tcp_conn->dd_data; - struct cxgb3i_adapter *snic = cconn->hba->snic; - struct cxgb3i_tag_format *tformat = &snic->tag_format; - u32 tag = ntohl((__force u32)hdr_itt); - - cxgb3i_tag_debug("release tag 0x%x.\n", tag); - - if (sc && - (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) && - cxgb3i_is_ddp_tag(tformat, tag)) - cxgb3i_ddp_tag_release(snic->tdev, tag); -} - -/** - * cxgb3i_host_template -- Scsi_Host_Template structure - * used when registering with the scsi mid layer - */ -static struct scsi_host_template cxgb3i_host_template = { - .module = THIS_MODULE, - .name = "Chelsio S3xx iSCSI Initiator", - .proc_name = "cxgb3i", - .queuecommand = iscsi_queuecommand, - .change_queue_depth = iscsi_change_queue_depth, - .can_queue = CXGB3I_SCSI_HOST_QDEPTH, - .sg_tablesize = SG_ALL, - .max_sectors = 0xFFFF, - .cmd_per_lun = ISCSI_DEF_CMD_PER_LUN, - .eh_abort_handler = iscsi_eh_abort, - .eh_device_reset_handler = iscsi_eh_device_reset, - .eh_target_reset_handler = iscsi_eh_recover_target, - .target_alloc = iscsi_target_alloc, - .use_clustering = DISABLE_CLUSTERING, - .this_id = -1, -}; - -static struct iscsi_transport cxgb3i_iscsi_transport = { - .owner = THIS_MODULE, - .name = "cxgb3i", - .caps = CAP_RECOVERY_L0 | CAP_MULTI_R2T | CAP_HDRDGST - | CAP_DATADGST | CAP_DIGEST_OFFLOAD | - CAP_PADDING_OFFLOAD, - .param_mask = ISCSI_MAX_RECV_DLENGTH | - ISCSI_MAX_XMIT_DLENGTH | - ISCSI_HDRDGST_EN | - ISCSI_DATADGST_EN | - ISCSI_INITIAL_R2T_EN | - ISCSI_MAX_R2T | - ISCSI_IMM_DATA_EN | - ISCSI_FIRST_BURST | - ISCSI_MAX_BURST | - ISCSI_PDU_INORDER_EN | - ISCSI_DATASEQ_INORDER_EN | - ISCSI_ERL | - ISCSI_CONN_PORT | - ISCSI_CONN_ADDRESS | - ISCSI_EXP_STATSN | - ISCSI_PERSISTENT_PORT | - ISCSI_PERSISTENT_ADDRESS | - ISCSI_TARGET_NAME | ISCSI_TPGT | - ISCSI_USERNAME | ISCSI_PASSWORD | - ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | - ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | - ISCSI_LU_RESET_TMO | ISCSI_TGT_RESET_TMO | - ISCSI_PING_TMO | ISCSI_RECV_TMO | - ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, - .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS | - ISCSI_HOST_INITIATOR_NAME | ISCSI_HOST_NETDEV_NAME, - .get_host_param = cxgb3i_host_get_param, - .set_host_param = cxgb3i_host_set_param, - /* session management */ - .create_session = cxgb3i_session_create, - .destroy_session = cxgb3i_session_destroy, - .get_session_param = iscsi_session_get_param, - /* connection management */ - .create_conn = cxgb3i_conn_create, - .bind_conn = cxgb3i_conn_bind, - .destroy_conn = iscsi_tcp_conn_teardown, - .start_conn = iscsi_conn_start, - .stop_conn = iscsi_conn_stop, - .get_conn_param = cxgb3i_conn_get_param, - .set_param = cxgb3i_conn_set_param, - .get_stats = cxgb3i_conn_get_stats, - /* pdu xmit req. from user space */ - .send_pdu = iscsi_conn_send_pdu, - /* task */ - .init_task = iscsi_tcp_task_init, - .xmit_task = iscsi_tcp_task_xmit, - .cleanup_task = cxgb3i_conn_cleanup_task, - - /* pdu */ - .alloc_pdu = cxgb3i_conn_alloc_pdu, - .init_pdu = cxgb3i_conn_init_pdu, - .xmit_pdu = cxgb3i_conn_xmit_pdu, - .parse_pdu_itt = cxgb3i_parse_itt, - - /* TCP connect/disconnect */ - .ep_connect = cxgb3i_ep_connect, - .ep_poll = cxgb3i_ep_poll, - .ep_disconnect = cxgb3i_ep_disconnect, - /* Error recovery timeout call */ - .session_recovery_timedout = iscsi_session_recovery_timedout, -}; - -int cxgb3i_iscsi_init(void) -{ - sw_tag_idx_bits = (__ilog2_u32(ISCSI_ITT_MASK)) + 1; - sw_tag_age_bits = (__ilog2_u32(ISCSI_AGE_MASK)) + 1; - cxgb3i_log_info("tag itt 0x%x, %u bits, age 0x%x, %u bits.\n", - ISCSI_ITT_MASK, sw_tag_idx_bits, - ISCSI_AGE_MASK, sw_tag_age_bits); - - cxgb3i_scsi_transport = - iscsi_register_transport(&cxgb3i_iscsi_transport); - if (!cxgb3i_scsi_transport) { - cxgb3i_log_error("Could not register cxgb3i transport.\n"); - return -ENODEV; - } - cxgb3i_api_debug("cxgb3i transport 0x%p.\n", cxgb3i_scsi_transport); - return 0; -} - -void cxgb3i_iscsi_cleanup(void) -{ - if (cxgb3i_scsi_transport) { - cxgb3i_api_debug("cxgb3i transport 0x%p.\n", - cxgb3i_scsi_transport); - iscsi_unregister_transport(&cxgb3i_iscsi_transport); - } -} diff --git a/drivers/scsi/cxgb3i/cxgb3i_offload.c b/drivers/scsi/cxgb3i/cxgb3i_offload.c deleted file mode 100644 index 246a6c2..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i_offload.c +++ /dev/null @@ -1,1944 +0,0 @@ -/* - * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management - * - * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved. - * - * 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 LICENSE file included in this - * release for licensing terms and conditions. - * - * Written by: Dimitris Michailidis (dm@xxxxxxxxxxx) - * Karen Xie (kxie@xxxxxxxxxxx) - */ - -#include <linux/if_vlan.h> -#include <linux/slab.h> -#include <linux/version.h> - -#include "cxgb3_defs.h" -#include "cxgb3_ctl_defs.h" -#include "firmware_exports.h" -#include "cxgb3i_offload.h" -#include "cxgb3i_pdu.h" -#include "cxgb3i_ddp.h" - -#ifdef __DEBUG_C3CN_CONN__ -#define c3cn_conn_debug cxgb3i_log_debug -#else -#define c3cn_conn_debug(fmt...) -#endif - -#ifdef __DEBUG_C3CN_TX__ -#define c3cn_tx_debug cxgb3i_log_debug -#else -#define c3cn_tx_debug(fmt...) -#endif - -#ifdef __DEBUG_C3CN_RX__ -#define c3cn_rx_debug cxgb3i_log_debug -#else -#define c3cn_rx_debug(fmt...) -#endif - -/* - * module parameters releated to offloaded iscsi connection - */ -static int cxgb3_rcv_win = 256 * 1024; -module_param(cxgb3_rcv_win, int, 0644); -MODULE_PARM_DESC(cxgb3_rcv_win, "TCP receive window in bytes (default=256KB)"); - -static int cxgb3_snd_win = 128 * 1024; -module_param(cxgb3_snd_win, int, 0644); -MODULE_PARM_DESC(cxgb3_snd_win, "TCP send window in bytes (default=128KB)"); - -static int cxgb3_rx_credit_thres = 10 * 1024; -module_param(cxgb3_rx_credit_thres, int, 0644); -MODULE_PARM_DESC(rx_credit_thres, - "RX credits return threshold in bytes (default=10KB)"); - -static unsigned int cxgb3_max_connect = 8 * 1024; -module_param(cxgb3_max_connect, uint, 0644); -MODULE_PARM_DESC(cxgb3_max_connect, "Max. # of connections (default=8092)"); - -static unsigned int cxgb3_sport_base = 20000; -module_param(cxgb3_sport_base, uint, 0644); -MODULE_PARM_DESC(cxgb3_sport_base, "starting port number (default=20000)"); - -/* - * cxgb3i tcp connection data(per adapter) list - */ -static LIST_HEAD(cdata_list); -static DEFINE_RWLOCK(cdata_rwlock); - -static int c3cn_push_tx_frames(struct s3_conn *c3cn, int req_completion); -static void c3cn_release_offload_resources(struct s3_conn *c3cn); - -/* - * iscsi source port management - * - * Find a free source port in the port allocation map. We use a very simple - * rotor scheme to look for the next free port. - * - * If a source port has been specified make sure that it doesn't collide with - * our normal source port allocation map. If it's outside the range of our - * allocation/deallocation scheme just let them use it. - * - * If the source port is outside our allocation range, the caller is - * responsible for keeping track of their port usage. - */ -static int c3cn_get_port(struct s3_conn *c3cn, struct cxgb3i_sdev_data *cdata) -{ - unsigned int start; - int idx; - - if (!cdata) - goto error_out; - - if (c3cn->saddr.sin_port) { - cxgb3i_log_error("connect, sin_port NON-ZERO %u.\n", - c3cn->saddr.sin_port); - return -EADDRINUSE; - } - - spin_lock_bh(&cdata->lock); - start = idx = cdata->sport_next; - do { - if (++idx >= cxgb3_max_connect) - idx = 0; - if (!cdata->sport_conn[idx]) { - c3cn->saddr.sin_port = htons(cxgb3_sport_base + idx); - cdata->sport_next = idx; - cdata->sport_conn[idx] = c3cn; - spin_unlock_bh(&cdata->lock); - - c3cn_conn_debug("%s reserve port %u.\n", - cdata->cdev->name, - cxgb3_sport_base + idx); - return 0; - } - } while (idx != start); - spin_unlock_bh(&cdata->lock); - -error_out: - return -EADDRNOTAVAIL; -} - -static void c3cn_put_port(struct s3_conn *c3cn) -{ - if (!c3cn->cdev) - return; - - if (c3cn->saddr.sin_port) { - struct cxgb3i_sdev_data *cdata = CXGB3_SDEV_DATA(c3cn->cdev); - int idx = ntohs(c3cn->saddr.sin_port) - cxgb3_sport_base; - - c3cn->saddr.sin_port = 0; - if (idx < 0 || idx >= cxgb3_max_connect) - return; - spin_lock_bh(&cdata->lock); - cdata->sport_conn[idx] = NULL; - spin_unlock_bh(&cdata->lock); - c3cn_conn_debug("%s, release port %u.\n", - cdata->cdev->name, cxgb3_sport_base + idx); - } -} - -static inline void c3cn_set_flag(struct s3_conn *c3cn, enum c3cn_flags flag) -{ - __set_bit(flag, &c3cn->flags); - c3cn_conn_debug("c3cn 0x%p, set %d, s %u, f 0x%lx.\n", - c3cn, flag, c3cn->state, c3cn->flags); -} - -static inline void c3cn_clear_flag(struct s3_conn *c3cn, enum c3cn_flags flag) -{ - __clear_bit(flag, &c3cn->flags); - c3cn_conn_debug("c3cn 0x%p, clear %d, s %u, f 0x%lx.\n", - c3cn, flag, c3cn->state, c3cn->flags); -} - -static inline int c3cn_flag(struct s3_conn *c3cn, enum c3cn_flags flag) -{ - if (c3cn == NULL) - return 0; - return test_bit(flag, &c3cn->flags); -} - -static void c3cn_set_state(struct s3_conn *c3cn, int state) -{ - c3cn_conn_debug("c3cn 0x%p state -> %u.\n", c3cn, state); - c3cn->state = state; -} - -static inline void c3cn_hold(struct s3_conn *c3cn) -{ - atomic_inc(&c3cn->refcnt); -} - -static inline void c3cn_put(struct s3_conn *c3cn) -{ - if (atomic_dec_and_test(&c3cn->refcnt)) { - c3cn_conn_debug("free c3cn 0x%p, s %u, f 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - kfree(c3cn); - } -} - -static void c3cn_closed(struct s3_conn *c3cn) -{ - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - c3cn_put_port(c3cn); - c3cn_release_offload_resources(c3cn); - c3cn_set_state(c3cn, C3CN_STATE_CLOSED); - cxgb3i_conn_closing(c3cn); -} - -/* - * CPL (Chelsio Protocol Language) defines a message passing interface between - * the host driver and T3 asic. - * The section below implments CPLs that related to iscsi tcp connection - * open/close/abort and data send/receive. - */ - -/* - * CPL connection active open request: host -> - */ -static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu) -{ - int i = 0; - - while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu) - ++i; - return i; -} - -static unsigned int select_mss(struct s3_conn *c3cn, unsigned int pmtu) -{ - unsigned int idx; - struct dst_entry *dst = c3cn->dst_cache; - struct t3cdev *cdev = c3cn->cdev; - const struct t3c_data *td = T3C_DATA(cdev); - u16 advmss = dst_metric(dst, RTAX_ADVMSS); - - if (advmss > pmtu - 40) - advmss = pmtu - 40; - if (advmss < td->mtus[0] - 40) - advmss = td->mtus[0] - 40; - idx = find_best_mtu(td, advmss + 40); - return idx; -} - -static inline int compute_wscale(int win) -{ - int wscale = 0; - while (wscale < 14 && (65535<<wscale) < win) - wscale++; - return wscale; -} - -static inline unsigned int calc_opt0h(struct s3_conn *c3cn) -{ - int wscale = compute_wscale(cxgb3_rcv_win); - return V_KEEP_ALIVE(1) | - F_TCAM_BYPASS | - V_WND_SCALE(wscale) | - V_MSS_IDX(c3cn->mss_idx); -} - -static inline unsigned int calc_opt0l(struct s3_conn *c3cn) -{ - return V_ULP_MODE(ULP_MODE_ISCSI) | - V_RCV_BUFSIZ(cxgb3_rcv_win>>10); -} - -static void make_act_open_req(struct s3_conn *c3cn, struct sk_buff *skb, - unsigned int atid, const struct l2t_entry *e) -{ - struct cpl_act_open_req *req; - - c3cn_conn_debug("c3cn 0x%p, atid 0x%x.\n", c3cn, atid); - - skb->priority = CPL_PRIORITY_SETUP; - req = (struct cpl_act_open_req *)__skb_put(skb, sizeof(*req)); - req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); - req->wr.wr_lo = 0; - OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, atid)); - req->local_port = c3cn->saddr.sin_port; - req->peer_port = c3cn->daddr.sin_port; - req->local_ip = c3cn->saddr.sin_addr.s_addr; - req->peer_ip = c3cn->daddr.sin_addr.s_addr; - req->opt0h = htonl(calc_opt0h(c3cn) | V_L2T_IDX(e->idx) | - V_TX_CHANNEL(e->smt_idx)); - req->opt0l = htonl(calc_opt0l(c3cn)); - req->params = 0; - req->opt2 = 0; -} - -static void fail_act_open(struct s3_conn *c3cn, int errno) -{ - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - c3cn->err = errno; - c3cn_closed(c3cn); -} - -static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb) -{ - struct s3_conn *c3cn = (struct s3_conn *)skb->sk; - - c3cn_conn_debug("c3cn 0x%p, state %u.\n", c3cn, c3cn->state); - - c3cn_hold(c3cn); - spin_lock_bh(&c3cn->lock); - if (c3cn->state == C3CN_STATE_CONNECTING) - fail_act_open(c3cn, -EHOSTUNREACH); - spin_unlock_bh(&c3cn->lock); - c3cn_put(c3cn); - __kfree_skb(skb); -} - -/* - * CPL connection close request: host -> - * - * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to - * the write queue (i.e., after any unsent txt data). - */ -static void skb_entail(struct s3_conn *c3cn, struct sk_buff *skb, - int flags) -{ - skb_tcp_seq(skb) = c3cn->write_seq; - skb_flags(skb) = flags; - __skb_queue_tail(&c3cn->write_queue, skb); -} - -static void send_close_req(struct s3_conn *c3cn) -{ - struct sk_buff *skb = c3cn->cpl_close; - struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; - unsigned int tid = c3cn->tid; - - c3cn_conn_debug("c3cn 0x%p, state 0x%x, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - c3cn->cpl_close = NULL; - - req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); - req->wr.wr_lo = htonl(V_WR_TID(tid)); - OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); - req->rsvd = htonl(c3cn->write_seq); - - skb_entail(c3cn, skb, C3CB_FLAG_NO_APPEND); - if (c3cn->state != C3CN_STATE_CONNECTING) - c3cn_push_tx_frames(c3cn, 1); -} - -/* - * CPL connection abort request: host -> - * - * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs - * for the same connection and also that we do not try to send a message - * after the connection has closed. - */ -static void abort_arp_failure(struct t3cdev *cdev, struct sk_buff *skb) -{ - struct cpl_abort_req *req = cplhdr(skb); - - c3cn_conn_debug("tdev 0x%p.\n", cdev); - - req->cmd = CPL_ABORT_NO_RST; - cxgb3_ofld_send(cdev, skb); -} - -static inline void c3cn_purge_write_queue(struct s3_conn *c3cn) -{ - struct sk_buff *skb; - - while ((skb = __skb_dequeue(&c3cn->write_queue))) - __kfree_skb(skb); -} - -static void send_abort_req(struct s3_conn *c3cn) -{ - struct sk_buff *skb = c3cn->cpl_abort_req; - struct cpl_abort_req *req; - unsigned int tid = c3cn->tid; - - if (unlikely(c3cn->state == C3CN_STATE_ABORTING) || !skb || - !c3cn->cdev) - return; - - c3cn_set_state(c3cn, C3CN_STATE_ABORTING); - - c3cn_conn_debug("c3cn 0x%p, flag ABORT_RPL + ABORT_SHUT.\n", c3cn); - - c3cn_set_flag(c3cn, C3CN_ABORT_RPL_PENDING); - - /* Purge the send queue so we don't send anything after an abort. */ - c3cn_purge_write_queue(c3cn); - - c3cn->cpl_abort_req = NULL; - req = (struct cpl_abort_req *)skb->head; - memset(req, 0, sizeof(*req)); - - skb->priority = CPL_PRIORITY_DATA; - set_arp_failure_handler(skb, abort_arp_failure); - - req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); - req->wr.wr_lo = htonl(V_WR_TID(tid)); - OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, tid)); - req->rsvd0 = htonl(c3cn->snd_nxt); - req->rsvd1 = !c3cn_flag(c3cn, C3CN_TX_DATA_SENT); - req->cmd = CPL_ABORT_SEND_RST; - - l2t_send(c3cn->cdev, skb, c3cn->l2t); -} - -/* - * CPL connection abort reply: host -> - * - * Send an ABORT_RPL message in response of the ABORT_REQ received. - */ -static void send_abort_rpl(struct s3_conn *c3cn, int rst_status) -{ - struct sk_buff *skb = c3cn->cpl_abort_rpl; - struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; - - c3cn->cpl_abort_rpl = NULL; - - skb->priority = CPL_PRIORITY_DATA; - memset(rpl, 0, sizeof(*rpl)); - rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); - rpl->wr.wr_lo = htonl(V_WR_TID(c3cn->tid)); - OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, c3cn->tid)); - rpl->cmd = rst_status; - - cxgb3_ofld_send(c3cn->cdev, skb); -} - -/* - * CPL connection rx data ack: host -> - * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of - * credits sent. - */ -static u32 send_rx_credits(struct s3_conn *c3cn, u32 credits, u32 dack) -{ - struct sk_buff *skb; - struct cpl_rx_data_ack *req; - - skb = alloc_skb(sizeof(*req), GFP_ATOMIC); - if (!skb) - return 0; - - req = (struct cpl_rx_data_ack *)__skb_put(skb, sizeof(*req)); - req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); - req->wr.wr_lo = 0; - OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, c3cn->tid)); - req->credit_dack = htonl(dack | V_RX_CREDITS(credits)); - skb->priority = CPL_PRIORITY_ACK; - cxgb3_ofld_send(c3cn->cdev, skb); - return credits; -} - -/* - * CPL connection tx data: host -> - * - * Send iscsi PDU via TX_DATA CPL message. Returns the number of - * credits sent. - * Each TX_DATA consumes work request credit (wrs), so we need to keep track of - * how many we've used so far and how many are pending (i.e., yet ack'ed by T3). - */ - -/* - * For ULP connections HW may inserts digest bytes into the pdu. Those digest - * bytes are not sent by the host but are part of the TCP payload and therefore - * consume TCP sequence space. - */ -static const unsigned int cxgb3_ulp_extra_len[] = { 0, 4, 4, 8 }; -static inline unsigned int ulp_extra_len(const struct sk_buff *skb) -{ - return cxgb3_ulp_extra_len[skb_ulp_mode(skb) & 3]; -} - -static unsigned int wrlen __read_mostly; - -/* - * The number of WRs needed for an skb depends on the number of fragments - * in the skb and whether it has any payload in its main body. This maps the - * length of the gather list represented by an skb into the # of necessary WRs. - * The extra two fragments are for iscsi bhs and payload padding. - */ -#define SKB_WR_LIST_SIZE (MAX_SKB_FRAGS + 2) -static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly; - -static void s3_init_wr_tab(unsigned int wr_len) -{ - int i; - - if (skb_wrs[1]) /* already initialized */ - return; - - for (i = 1; i < SKB_WR_LIST_SIZE; i++) { - int sgl_len = (3 * i) / 2 + (i & 1); - - sgl_len += 3; - skb_wrs[i] = (sgl_len <= wr_len - ? 1 : 1 + (sgl_len - 2) / (wr_len - 1)); - } - - wrlen = wr_len * 8; -} - -static inline void reset_wr_list(struct s3_conn *c3cn) -{ - c3cn->wr_pending_head = c3cn->wr_pending_tail = NULL; -} - -/* - * Add a WR to a connections's list of pending WRs. This is a singly-linked - * list of sk_buffs operating as a FIFO. The head is kept in wr_pending_head - * and the tail in wr_pending_tail. - */ -static inline void enqueue_wr(struct s3_conn *c3cn, - struct sk_buff *skb) -{ - skb_tx_wr_next(skb) = NULL; - - /* - * We want to take an extra reference since both us and the driver - * need to free the packet before it's really freed. We know there's - * just one user currently so we use atomic_set rather than skb_get - * to avoid the atomic op. - */ - atomic_set(&skb->users, 2); - - if (!c3cn->wr_pending_head) - c3cn->wr_pending_head = skb; - else - skb_tx_wr_next(c3cn->wr_pending_tail) = skb; - c3cn->wr_pending_tail = skb; -} - -static int count_pending_wrs(struct s3_conn *c3cn) -{ - int n = 0; - const struct sk_buff *skb = c3cn->wr_pending_head; - - while (skb) { - n += skb->csum; - skb = skb_tx_wr_next(skb); - } - return n; -} - -static inline struct sk_buff *peek_wr(const struct s3_conn *c3cn) -{ - return c3cn->wr_pending_head; -} - -static inline void free_wr_skb(struct sk_buff *skb) -{ - kfree_skb(skb); -} - -static inline struct sk_buff *dequeue_wr(struct s3_conn *c3cn) -{ - struct sk_buff *skb = c3cn->wr_pending_head; - - if (likely(skb)) { - /* Don't bother clearing the tail */ - c3cn->wr_pending_head = skb_tx_wr_next(skb); - skb_tx_wr_next(skb) = NULL; - } - return skb; -} - -static void purge_wr_queue(struct s3_conn *c3cn) -{ - struct sk_buff *skb; - while ((skb = dequeue_wr(c3cn)) != NULL) - free_wr_skb(skb); -} - -static inline void make_tx_data_wr(struct s3_conn *c3cn, struct sk_buff *skb, - int len, int req_completion) -{ - struct tx_data_wr *req; - - skb_reset_transport_header(skb); - req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req)); - req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) | - (req_completion ? F_WR_COMPL : 0)); - req->wr_lo = htonl(V_WR_TID(c3cn->tid)); - req->sndseq = htonl(c3cn->snd_nxt); - /* len includes the length of any HW ULP additions */ - req->len = htonl(len); - req->param = htonl(V_TX_PORT(c3cn->l2t->smt_idx)); - /* V_TX_ULP_SUBMODE sets both the mode and submode */ - req->flags = htonl(V_TX_ULP_SUBMODE(skb_ulp_mode(skb)) | - V_TX_SHOVE((skb_peek(&c3cn->write_queue) ? 0 : 1))); - - if (!c3cn_flag(c3cn, C3CN_TX_DATA_SENT)) { - req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT | - V_TX_CPU_IDX(c3cn->qset)); - /* Sendbuffer is in units of 32KB. */ - req->param |= htonl(V_TX_SNDBUF(cxgb3_snd_win >> 15)); - c3cn_set_flag(c3cn, C3CN_TX_DATA_SENT); - } -} - -/** - * c3cn_push_tx_frames -- start transmit - * @c3cn: the offloaded connection - * @req_completion: request wr_ack or not - * - * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a - * connection's send queue and sends them on to T3. Must be called with the - * connection's lock held. Returns the amount of send buffer space that was - * freed as a result of sending queued data to T3. - */ -static void arp_failure_discard(struct t3cdev *cdev, struct sk_buff *skb) -{ - kfree_skb(skb); -} - -static int c3cn_push_tx_frames(struct s3_conn *c3cn, int req_completion) -{ - int total_size = 0; - struct sk_buff *skb; - struct t3cdev *cdev; - struct cxgb3i_sdev_data *cdata; - - if (unlikely(c3cn->state == C3CN_STATE_CONNECTING || - c3cn->state == C3CN_STATE_CLOSE_WAIT_1 || - c3cn->state >= C3CN_STATE_ABORTING)) { - c3cn_tx_debug("c3cn 0x%p, in closing state %u.\n", - c3cn, c3cn->state); - return 0; - } - - cdev = c3cn->cdev; - cdata = CXGB3_SDEV_DATA(cdev); - - while (c3cn->wr_avail - && (skb = skb_peek(&c3cn->write_queue)) != NULL) { - int len = skb->len; /* length before skb_push */ - int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len); - int wrs_needed = skb_wrs[frags]; - - if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen) - wrs_needed = 1; - - WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1); - - if (c3cn->wr_avail < wrs_needed) { - c3cn_tx_debug("c3cn 0x%p, skb len %u/%u, frag %u, " - "wr %d < %u.\n", - c3cn, skb->len, skb->data_len, frags, - wrs_needed, c3cn->wr_avail); - break; - } - - __skb_unlink(skb, &c3cn->write_queue); - skb->priority = CPL_PRIORITY_DATA; - skb->csum = wrs_needed; /* remember this until the WR_ACK */ - c3cn->wr_avail -= wrs_needed; - c3cn->wr_unacked += wrs_needed; - enqueue_wr(c3cn, skb); - - c3cn_tx_debug("c3cn 0x%p, enqueue, skb len %u/%u, frag %u, " - "wr %d, left %u, unack %u.\n", - c3cn, skb->len, skb->data_len, frags, - wrs_needed, c3cn->wr_avail, c3cn->wr_unacked); - - - if (likely(skb_flags(skb) & C3CB_FLAG_NEED_HDR)) { - if ((req_completion && - c3cn->wr_unacked == wrs_needed) || - (skb_flags(skb) & C3CB_FLAG_COMPL) || - c3cn->wr_unacked >= c3cn->wr_max / 2) { - req_completion = 1; - c3cn->wr_unacked = 0; - } - len += ulp_extra_len(skb); - make_tx_data_wr(c3cn, skb, len, req_completion); - c3cn->snd_nxt += len; - skb_flags(skb) &= ~C3CB_FLAG_NEED_HDR; - } - - total_size += skb->truesize; - set_arp_failure_handler(skb, arp_failure_discard); - l2t_send(cdev, skb, c3cn->l2t); - } - return total_size; -} - -/* - * process_cpl_msg: -> host - * Top-level CPL message processing used by most CPL messages that - * pertain to connections. - */ -static inline void process_cpl_msg(void (*fn)(struct s3_conn *, - struct sk_buff *), - struct s3_conn *c3cn, - struct sk_buff *skb) -{ - spin_lock_bh(&c3cn->lock); - fn(c3cn, skb); - spin_unlock_bh(&c3cn->lock); -} - -/* - * process_cpl_msg_ref: -> host - * Similar to process_cpl_msg() but takes an extra connection reference around - * the call to the handler. Should be used if the handler may drop a - * connection reference. - */ -static inline void process_cpl_msg_ref(void (*fn) (struct s3_conn *, - struct sk_buff *), - struct s3_conn *c3cn, - struct sk_buff *skb) -{ - c3cn_hold(c3cn); - process_cpl_msg(fn, c3cn, skb); - c3cn_put(c3cn); -} - -/* - * Process a CPL_ACT_ESTABLISH message: -> host - * Updates connection state from an active establish CPL message. Runs with - * the connection lock held. - */ - -static inline void s3_free_atid(struct t3cdev *cdev, unsigned int tid) -{ - struct s3_conn *c3cn = cxgb3_free_atid(cdev, tid); - if (c3cn) - c3cn_put(c3cn); -} - -static void c3cn_established(struct s3_conn *c3cn, u32 snd_isn, - unsigned int opt) -{ - c3cn_conn_debug("c3cn 0x%p, state %u.\n", c3cn, c3cn->state); - - c3cn->write_seq = c3cn->snd_nxt = c3cn->snd_una = snd_isn; - - /* - * Causes the first RX_DATA_ACK to supply any Rx credits we couldn't - * pass through opt0. - */ - if (cxgb3_rcv_win > (M_RCV_BUFSIZ << 10)) - c3cn->rcv_wup -= cxgb3_rcv_win - (M_RCV_BUFSIZ << 10); - - dst_confirm(c3cn->dst_cache); - - smp_mb(); - - c3cn_set_state(c3cn, C3CN_STATE_ESTABLISHED); -} - -static void process_act_establish(struct s3_conn *c3cn, struct sk_buff *skb) -{ - struct cpl_act_establish *req = cplhdr(skb); - u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */ - - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - if (unlikely(c3cn->state != C3CN_STATE_CONNECTING)) - cxgb3i_log_error("TID %u expected SYN_SENT, got EST., s %u\n", - c3cn->tid, c3cn->state); - - c3cn->copied_seq = c3cn->rcv_wup = c3cn->rcv_nxt = rcv_isn; - c3cn_established(c3cn, ntohl(req->snd_isn), ntohs(req->tcp_opt)); - - __kfree_skb(skb); - - if (unlikely(c3cn_flag(c3cn, C3CN_ACTIVE_CLOSE_NEEDED))) - /* upper layer has requested closing */ - send_abort_req(c3cn); - else { - if (skb_queue_len(&c3cn->write_queue)) - c3cn_push_tx_frames(c3cn, 1); - cxgb3i_conn_tx_open(c3cn); - } -} - -static int do_act_establish(struct t3cdev *cdev, struct sk_buff *skb, - void *ctx) -{ - struct cpl_act_establish *req = cplhdr(skb); - unsigned int tid = GET_TID(req); - unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); - struct s3_conn *c3cn = ctx; - struct cxgb3i_sdev_data *cdata = CXGB3_SDEV_DATA(cdev); - - c3cn_conn_debug("rcv, tid 0x%x, c3cn 0x%p, s %u, f 0x%lx.\n", - tid, c3cn, c3cn->state, c3cn->flags); - - c3cn->tid = tid; - c3cn_hold(c3cn); - cxgb3_insert_tid(cdata->cdev, cdata->client, c3cn, tid); - s3_free_atid(cdev, atid); - - c3cn->qset = G_QNUM(ntohl(skb->csum)); - - process_cpl_msg(process_act_establish, c3cn, skb); - return 0; -} - -/* - * Process a CPL_ACT_OPEN_RPL message: -> host - * Handle active open failures. - */ -static int act_open_rpl_status_to_errno(int status) -{ - switch (status) { - case CPL_ERR_CONN_RESET: - return -ECONNREFUSED; - case CPL_ERR_ARP_MISS: - return -EHOSTUNREACH; - case CPL_ERR_CONN_TIMEDOUT: - return -ETIMEDOUT; - case CPL_ERR_TCAM_FULL: - return -ENOMEM; - case CPL_ERR_CONN_EXIST: - cxgb3i_log_error("ACTIVE_OPEN_RPL: 4-tuple in use\n"); - return -EADDRINUSE; - default: - return -EIO; - } -} - -static void act_open_retry_timer(unsigned long data) -{ - struct sk_buff *skb; - struct s3_conn *c3cn = (struct s3_conn *)data; - - c3cn_conn_debug("c3cn 0x%p, state %u.\n", c3cn, c3cn->state); - - spin_lock_bh(&c3cn->lock); - skb = alloc_skb(sizeof(struct cpl_act_open_req), GFP_ATOMIC); - if (!skb) - fail_act_open(c3cn, -ENOMEM); - else { - skb->sk = (struct sock *)c3cn; - set_arp_failure_handler(skb, act_open_req_arp_failure); - make_act_open_req(c3cn, skb, c3cn->tid, c3cn->l2t); - l2t_send(c3cn->cdev, skb, c3cn->l2t); - } - spin_unlock_bh(&c3cn->lock); - c3cn_put(c3cn); -} - -static void process_act_open_rpl(struct s3_conn *c3cn, struct sk_buff *skb) -{ - struct cpl_act_open_rpl *rpl = cplhdr(skb); - - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - if (rpl->status == CPL_ERR_CONN_EXIST && - c3cn->retry_timer.function != act_open_retry_timer) { - c3cn->retry_timer.function = act_open_retry_timer; - if (!mod_timer(&c3cn->retry_timer, jiffies + HZ / 2)) - c3cn_hold(c3cn); - } else - fail_act_open(c3cn, act_open_rpl_status_to_errno(rpl->status)); - __kfree_skb(skb); -} - -static int do_act_open_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) -{ - struct s3_conn *c3cn = ctx; - struct cpl_act_open_rpl *rpl = cplhdr(skb); - - c3cn_conn_debug("rcv, status 0x%x, c3cn 0x%p, s %u, f 0x%lx.\n", - rpl->status, c3cn, c3cn->state, c3cn->flags); - - if (rpl->status != CPL_ERR_TCAM_FULL && - rpl->status != CPL_ERR_CONN_EXIST && - rpl->status != CPL_ERR_ARP_MISS) - cxgb3_queue_tid_release(cdev, GET_TID(rpl)); - - process_cpl_msg_ref(process_act_open_rpl, c3cn, skb); - return 0; -} - -/* - * Process PEER_CLOSE CPL messages: -> host - * Handle peer FIN. - */ -static void process_peer_close(struct s3_conn *c3cn, struct sk_buff *skb) -{ - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING)) - goto out; - - switch (c3cn->state) { - case C3CN_STATE_ESTABLISHED: - c3cn_set_state(c3cn, C3CN_STATE_PASSIVE_CLOSE); - break; - case C3CN_STATE_ACTIVE_CLOSE: - c3cn_set_state(c3cn, C3CN_STATE_CLOSE_WAIT_2); - break; - case C3CN_STATE_CLOSE_WAIT_1: - c3cn_closed(c3cn); - break; - case C3CN_STATE_ABORTING: - break; - default: - cxgb3i_log_error("%s: peer close, TID %u in bad state %u\n", - c3cn->cdev->name, c3cn->tid, c3cn->state); - } - - cxgb3i_conn_closing(c3cn); -out: - __kfree_skb(skb); -} - -static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) -{ - struct s3_conn *c3cn = ctx; - - c3cn_conn_debug("rcv, c3cn 0x%p, s %u, f 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - process_cpl_msg_ref(process_peer_close, c3cn, skb); - return 0; -} - -/* - * Process CLOSE_CONN_RPL CPL message: -> host - * Process a peer ACK to our FIN. - */ -static void process_close_con_rpl(struct s3_conn *c3cn, struct sk_buff *skb) -{ - struct cpl_close_con_rpl *rpl = cplhdr(skb); - - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - c3cn->snd_una = ntohl(rpl->snd_nxt) - 1; /* exclude FIN */ - - if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING)) - goto out; - - switch (c3cn->state) { - case C3CN_STATE_ACTIVE_CLOSE: - c3cn_set_state(c3cn, C3CN_STATE_CLOSE_WAIT_1); - break; - case C3CN_STATE_CLOSE_WAIT_1: - case C3CN_STATE_CLOSE_WAIT_2: - c3cn_closed(c3cn); - break; - case C3CN_STATE_ABORTING: - break; - default: - cxgb3i_log_error("%s: close_rpl, TID %u in bad state %u\n", - c3cn->cdev->name, c3cn->tid, c3cn->state); - } - -out: - kfree_skb(skb); -} - -static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb, - void *ctx) -{ - struct s3_conn *c3cn = ctx; - - c3cn_conn_debug("rcv, c3cn 0x%p, s %u, f 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - process_cpl_msg_ref(process_close_con_rpl, c3cn, skb); - return 0; -} - -/* - * Process ABORT_REQ_RSS CPL message: -> host - * Process abort requests. If we are waiting for an ABORT_RPL we ignore this - * request except that we need to reply to it. - */ - -static int abort_status_to_errno(struct s3_conn *c3cn, int abort_reason, - int *need_rst) -{ - switch (abort_reason) { - case CPL_ERR_BAD_SYN: /* fall through */ - case CPL_ERR_CONN_RESET: - return c3cn->state > C3CN_STATE_ESTABLISHED ? - -EPIPE : -ECONNRESET; - case CPL_ERR_XMIT_TIMEDOUT: - case CPL_ERR_PERSIST_TIMEDOUT: - case CPL_ERR_FINWAIT2_TIMEDOUT: - case CPL_ERR_KEEPALIVE_TIMEDOUT: - return -ETIMEDOUT; - default: - return -EIO; - } -} - -static void process_abort_req(struct s3_conn *c3cn, struct sk_buff *skb) -{ - int rst_status = CPL_ABORT_NO_RST; - const struct cpl_abort_req_rss *req = cplhdr(skb); - - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - if (!c3cn_flag(c3cn, C3CN_ABORT_REQ_RCVD)) { - c3cn_set_flag(c3cn, C3CN_ABORT_REQ_RCVD); - c3cn_set_state(c3cn, C3CN_STATE_ABORTING); - __kfree_skb(skb); - return; - } - - c3cn_clear_flag(c3cn, C3CN_ABORT_REQ_RCVD); - send_abort_rpl(c3cn, rst_status); - - if (!c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING)) { - c3cn->err = - abort_status_to_errno(c3cn, req->status, &rst_status); - c3cn_closed(c3cn); - } -} - -static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) -{ - const struct cpl_abort_req_rss *req = cplhdr(skb); - struct s3_conn *c3cn = ctx; - - c3cn_conn_debug("rcv, c3cn 0x%p, s 0x%x, f 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - if (req->status == CPL_ERR_RTX_NEG_ADVICE || - req->status == CPL_ERR_PERSIST_NEG_ADVICE) { - __kfree_skb(skb); - return 0; - } - - process_cpl_msg_ref(process_abort_req, c3cn, skb); - return 0; -} - -/* - * Process ABORT_RPL_RSS CPL message: -> host - * Process abort replies. We only process these messages if we anticipate - * them as the coordination between SW and HW in this area is somewhat lacking - * and sometimes we get ABORT_RPLs after we are done with the connection that - * originated the ABORT_REQ. - */ -static void process_abort_rpl(struct s3_conn *c3cn, struct sk_buff *skb) -{ - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - if (c3cn_flag(c3cn, C3CN_ABORT_RPL_PENDING)) { - if (!c3cn_flag(c3cn, C3CN_ABORT_RPL_RCVD)) - c3cn_set_flag(c3cn, C3CN_ABORT_RPL_RCVD); - else { - c3cn_clear_flag(c3cn, C3CN_ABORT_RPL_RCVD); - c3cn_clear_flag(c3cn, C3CN_ABORT_RPL_PENDING); - if (c3cn_flag(c3cn, C3CN_ABORT_REQ_RCVD)) - cxgb3i_log_error("%s tid %u, ABORT_RPL_RSS\n", - c3cn->cdev->name, c3cn->tid); - c3cn_closed(c3cn); - } - } - __kfree_skb(skb); -} - -static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) -{ - struct cpl_abort_rpl_rss *rpl = cplhdr(skb); - struct s3_conn *c3cn = ctx; - - c3cn_conn_debug("rcv, status 0x%x, c3cn 0x%p, s %u, 0x%lx.\n", - rpl->status, c3cn, c3cn ? c3cn->state : 0, - c3cn ? c3cn->flags : 0UL); - - /* - * Ignore replies to post-close aborts indicating that the abort was - * requested too late. These connections are terminated when we get - * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss - * arrives the TID is either no longer used or it has been recycled. - */ - if (rpl->status == CPL_ERR_ABORT_FAILED) - goto discard; - - /* - * Sometimes we've already closed the connection, e.g., a post-close - * abort races with ABORT_REQ_RSS, the latter frees the connection - * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED, - * but FW turns the ABORT_REQ into a regular one and so we get - * ABORT_RPL_RSS with status 0 and no connection. - */ - if (!c3cn) - goto discard; - - process_cpl_msg_ref(process_abort_rpl, c3cn, skb); - return 0; - -discard: - __kfree_skb(skb); - return 0; -} - -/* - * Process RX_ISCSI_HDR CPL message: -> host - * Handle received PDUs, the payload could be DDP'ed. If not, the payload - * follow after the bhs. - */ -static void process_rx_iscsi_hdr(struct s3_conn *c3cn, struct sk_buff *skb) -{ - struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb); - struct cpl_iscsi_hdr_norss data_cpl; - struct cpl_rx_data_ddp_norss ddp_cpl; - unsigned int hdr_len, data_len, status; - unsigned int len; - int err; - - if (unlikely(c3cn->state >= C3CN_STATE_PASSIVE_CLOSE)) { - if (c3cn->state != C3CN_STATE_ABORTING) - send_abort_req(c3cn); - __kfree_skb(skb); - return; - } - - skb_tcp_seq(skb) = ntohl(hdr_cpl->seq); - skb_flags(skb) = 0; - - skb_reset_transport_header(skb); - __skb_pull(skb, sizeof(struct cpl_iscsi_hdr)); - - len = hdr_len = ntohs(hdr_cpl->len); - /* msg coalesce is off or not enough data received */ - if (skb->len <= hdr_len) { - cxgb3i_log_error("%s: TID %u, ISCSI_HDR, skb len %u < %u.\n", - c3cn->cdev->name, c3cn->tid, - skb->len, hdr_len); - goto abort_conn; - } - - err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl, - sizeof(ddp_cpl)); - if (err < 0) - goto abort_conn; - - skb_ulp_mode(skb) = ULP2_FLAG_DATA_READY; - skb_rx_pdulen(skb) = ntohs(ddp_cpl.len); - skb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc); - status = ntohl(ddp_cpl.ddp_status); - - c3cn_rx_debug("rx skb 0x%p, len %u, pdulen %u, ddp status 0x%x.\n", - skb, skb->len, skb_rx_pdulen(skb), status); - - if (status & (1 << RX_DDP_STATUS_HCRC_SHIFT)) - skb_ulp_mode(skb) |= ULP2_FLAG_HCRC_ERROR; - if (status & (1 << RX_DDP_STATUS_DCRC_SHIFT)) - skb_ulp_mode(skb) |= ULP2_FLAG_DCRC_ERROR; - if (status & (1 << RX_DDP_STATUS_PAD_SHIFT)) - skb_ulp_mode(skb) |= ULP2_FLAG_PAD_ERROR; - - if (skb->len > (hdr_len + sizeof(ddp_cpl))) { - err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl)); - if (err < 0) - goto abort_conn; - data_len = ntohs(data_cpl.len); - len += sizeof(data_cpl) + data_len; - } else if (status & (1 << RX_DDP_STATUS_DDP_SHIFT)) - skb_ulp_mode(skb) |= ULP2_FLAG_DATA_DDPED; - - c3cn->rcv_nxt = ntohl(ddp_cpl.seq) + skb_rx_pdulen(skb); - __pskb_trim(skb, len); - __skb_queue_tail(&c3cn->receive_queue, skb); - cxgb3i_conn_pdu_ready(c3cn); - - return; - -abort_conn: - send_abort_req(c3cn); - __kfree_skb(skb); -} - -static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx) -{ - struct s3_conn *c3cn = ctx; - - process_cpl_msg(process_rx_iscsi_hdr, c3cn, skb); - return 0; -} - -/* - * Process TX_DATA_ACK CPL messages: -> host - * Process an acknowledgment of WR completion. Advance snd_una and send the - * next batch of work requests from the write queue. - */ -static void check_wr_invariants(struct s3_conn *c3cn) -{ - int pending = count_pending_wrs(c3cn); - - if (unlikely(c3cn->wr_avail + pending != c3cn->wr_max)) - cxgb3i_log_error("TID %u: credit imbalance: avail %u, " - "pending %u, total should be %u\n", - c3cn->tid, c3cn->wr_avail, pending, - c3cn->wr_max); -} - -static void process_wr_ack(struct s3_conn *c3cn, struct sk_buff *skb) -{ - struct cpl_wr_ack *hdr = cplhdr(skb); - unsigned int credits = ntohs(hdr->credits); - u32 snd_una = ntohl(hdr->snd_una); - - c3cn_tx_debug("%u WR credits, avail %u, unack %u, TID %u, state %u.\n", - credits, c3cn->wr_avail, c3cn->wr_unacked, - c3cn->tid, c3cn->state); - - c3cn->wr_avail += credits; - if (c3cn->wr_unacked > c3cn->wr_max - c3cn->wr_avail) - c3cn->wr_unacked = c3cn->wr_max - c3cn->wr_avail; - - while (credits) { - struct sk_buff *p = peek_wr(c3cn); - - if (unlikely(!p)) { - cxgb3i_log_error("%u WR_ACK credits for TID %u with " - "nothing pending, state %u\n", - credits, c3cn->tid, c3cn->state); - break; - } - if (unlikely(credits < p->csum)) { - struct tx_data_wr *w = cplhdr(p); - cxgb3i_log_error("TID %u got %u WR credits need %u, " - "len %u, main body %u, frags %u, " - "seq # %u, ACK una %u, ACK nxt %u, " - "WR_AVAIL %u, WRs pending %u\n", - c3cn->tid, credits, p->csum, p->len, - p->len - p->data_len, - skb_shinfo(p)->nr_frags, - ntohl(w->sndseq), snd_una, - ntohl(hdr->snd_nxt), c3cn->wr_avail, - count_pending_wrs(c3cn) - credits); - p->csum -= credits; - break; - } else { - dequeue_wr(c3cn); - credits -= p->csum; - free_wr_skb(p); - } - } - - check_wr_invariants(c3cn); - - if (unlikely(before(snd_una, c3cn->snd_una))) { - cxgb3i_log_error("TID %u, unexpected sequence # %u in WR_ACK " - "snd_una %u\n", - c3cn->tid, snd_una, c3cn->snd_una); - goto out_free; - } - - if (c3cn->snd_una != snd_una) { - c3cn->snd_una = snd_una; - dst_confirm(c3cn->dst_cache); - } - - if (skb_queue_len(&c3cn->write_queue)) { - if (c3cn_push_tx_frames(c3cn, 0)) - cxgb3i_conn_tx_open(c3cn); - } else - cxgb3i_conn_tx_open(c3cn); -out_free: - __kfree_skb(skb); -} - -static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) -{ - struct s3_conn *c3cn = ctx; - - process_cpl_msg(process_wr_ack, c3cn, skb); - return 0; -} - -/* - * for each connection, pre-allocate skbs needed for close/abort requests. So - * that we can service the request right away. - */ -static void c3cn_free_cpl_skbs(struct s3_conn *c3cn) -{ - if (c3cn->cpl_close) - kfree_skb(c3cn->cpl_close); - if (c3cn->cpl_abort_req) - kfree_skb(c3cn->cpl_abort_req); - if (c3cn->cpl_abort_rpl) - kfree_skb(c3cn->cpl_abort_rpl); -} - -static int c3cn_alloc_cpl_skbs(struct s3_conn *c3cn) -{ - c3cn->cpl_close = alloc_skb(sizeof(struct cpl_close_con_req), - GFP_KERNEL); - if (!c3cn->cpl_close) - return -ENOMEM; - skb_put(c3cn->cpl_close, sizeof(struct cpl_close_con_req)); - - c3cn->cpl_abort_req = alloc_skb(sizeof(struct cpl_abort_req), - GFP_KERNEL); - if (!c3cn->cpl_abort_req) - goto free_cpl_skbs; - skb_put(c3cn->cpl_abort_req, sizeof(struct cpl_abort_req)); - - c3cn->cpl_abort_rpl = alloc_skb(sizeof(struct cpl_abort_rpl), - GFP_KERNEL); - if (!c3cn->cpl_abort_rpl) - goto free_cpl_skbs; - skb_put(c3cn->cpl_abort_rpl, sizeof(struct cpl_abort_rpl)); - - return 0; - -free_cpl_skbs: - c3cn_free_cpl_skbs(c3cn); - return -ENOMEM; -} - -/** - * c3cn_release_offload_resources - release offload resource - * @c3cn: the offloaded iscsi tcp connection. - * Release resources held by an offload connection (TID, L2T entry, etc.) - */ -static void c3cn_release_offload_resources(struct s3_conn *c3cn) -{ - struct t3cdev *cdev = c3cn->cdev; - unsigned int tid = c3cn->tid; - - c3cn->qset = 0; - c3cn_free_cpl_skbs(c3cn); - - if (c3cn->wr_avail != c3cn->wr_max) { - purge_wr_queue(c3cn); - reset_wr_list(c3cn); - } - - if (cdev) { - if (c3cn->l2t) { - l2t_release(L2DATA(cdev), c3cn->l2t); - c3cn->l2t = NULL; - } - if (c3cn->state == C3CN_STATE_CONNECTING) - /* we have ATID */ - s3_free_atid(cdev, tid); - else { - /* we have TID */ - cxgb3_remove_tid(cdev, (void *)c3cn, tid); - c3cn_put(c3cn); - } - } - - c3cn->dst_cache = NULL; - c3cn->cdev = NULL; -} - -/** - * cxgb3i_c3cn_create - allocate and initialize an s3_conn structure - * returns the s3_conn structure allocated. - */ -struct s3_conn *cxgb3i_c3cn_create(void) -{ - struct s3_conn *c3cn; - - c3cn = kzalloc(sizeof(*c3cn), GFP_KERNEL); - if (!c3cn) - return NULL; - - /* pre-allocate close/abort cpl, so we don't need to wait for memory - when close/abort is requested. */ - if (c3cn_alloc_cpl_skbs(c3cn) < 0) - goto free_c3cn; - - c3cn_conn_debug("alloc c3cn 0x%p.\n", c3cn); - - c3cn->flags = 0; - spin_lock_init(&c3cn->lock); - atomic_set(&c3cn->refcnt, 1); - skb_queue_head_init(&c3cn->receive_queue); - skb_queue_head_init(&c3cn->write_queue); - setup_timer(&c3cn->retry_timer, NULL, (unsigned long)c3cn); - rwlock_init(&c3cn->callback_lock); - - return c3cn; - -free_c3cn: - kfree(c3cn); - return NULL; -} - -static void c3cn_active_close(struct s3_conn *c3cn) -{ - int data_lost; - int close_req = 0; - - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - - dst_confirm(c3cn->dst_cache); - - c3cn_hold(c3cn); - spin_lock_bh(&c3cn->lock); - - data_lost = skb_queue_len(&c3cn->receive_queue); - __skb_queue_purge(&c3cn->receive_queue); - - switch (c3cn->state) { - case C3CN_STATE_CLOSED: - case C3CN_STATE_ACTIVE_CLOSE: - case C3CN_STATE_CLOSE_WAIT_1: - case C3CN_STATE_CLOSE_WAIT_2: - case C3CN_STATE_ABORTING: - /* nothing need to be done */ - break; - case C3CN_STATE_CONNECTING: - /* defer until cpl_act_open_rpl or cpl_act_establish */ - c3cn_set_flag(c3cn, C3CN_ACTIVE_CLOSE_NEEDED); - break; - case C3CN_STATE_ESTABLISHED: - close_req = 1; - c3cn_set_state(c3cn, C3CN_STATE_ACTIVE_CLOSE); - break; - case C3CN_STATE_PASSIVE_CLOSE: - close_req = 1; - c3cn_set_state(c3cn, C3CN_STATE_CLOSE_WAIT_2); - break; - } - - if (close_req) { - if (data_lost) - /* Unread data was tossed, zap the connection. */ - send_abort_req(c3cn); - else - send_close_req(c3cn); - } - - spin_unlock_bh(&c3cn->lock); - c3cn_put(c3cn); -} - -/** - * cxgb3i_c3cn_release - close and release an iscsi tcp connection and any - * resource held - * @c3cn: the iscsi tcp connection - */ -void cxgb3i_c3cn_release(struct s3_conn *c3cn) -{ - c3cn_conn_debug("c3cn 0x%p, s %u, f 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - if (unlikely(c3cn->state == C3CN_STATE_CONNECTING)) - c3cn_set_flag(c3cn, C3CN_ACTIVE_CLOSE_NEEDED); - else if (likely(c3cn->state != C3CN_STATE_CLOSED)) - c3cn_active_close(c3cn); - c3cn_put(c3cn); -} - -static int is_cxgb3_dev(struct net_device *dev) -{ - struct cxgb3i_sdev_data *cdata; - struct net_device *ndev = dev; - - if (dev->priv_flags & IFF_802_1Q_VLAN) - ndev = vlan_dev_real_dev(dev); - - write_lock(&cdata_rwlock); - list_for_each_entry(cdata, &cdata_list, list) { - struct adap_ports *ports = &cdata->ports; - int i; - - for (i = 0; i < ports->nports; i++) - if (ndev == ports->lldevs[i]) { - write_unlock(&cdata_rwlock); - return 1; - } - } - write_unlock(&cdata_rwlock); - return 0; -} - -/** - * cxgb3_egress_dev - return the cxgb3 egress device - * @root_dev: the root device anchoring the search - * @c3cn: the connection used to determine egress port in bonding mode - * @context: in bonding mode, indicates a connection set up or failover - * - * Return egress device or NULL if the egress device isn't one of our ports. - */ -static struct net_device *cxgb3_egress_dev(struct net_device *root_dev, - struct s3_conn *c3cn, - int context) -{ - while (root_dev) { - if (root_dev->priv_flags & IFF_802_1Q_VLAN) - root_dev = vlan_dev_real_dev(root_dev); - else if (is_cxgb3_dev(root_dev)) - return root_dev; - else - return NULL; - } - return NULL; -} - -static struct rtable *find_route(struct net_device *dev, - __be32 saddr, __be32 daddr, - __be16 sport, __be16 dport) -{ - struct rtable *rt; - struct flowi fl = { - .oif = dev ? dev->ifindex : 0, - .nl_u = { - .ip4_u = { - .daddr = daddr, - .saddr = saddr, - .tos = 0 } }, - .proto = IPPROTO_TCP, - .uli_u = { - .ports = { - .sport = sport, - .dport = dport } } }; - - if (ip_route_output_flow(&init_net, &rt, &fl, NULL, 0)) - return NULL; - return rt; -} - -/* - * Assign offload parameters to some connection fields. - */ -static void init_offload_conn(struct s3_conn *c3cn, - struct t3cdev *cdev, - struct dst_entry *dst) -{ - BUG_ON(c3cn->cdev != cdev); - c3cn->wr_max = c3cn->wr_avail = T3C_DATA(cdev)->max_wrs - 1; - c3cn->wr_unacked = 0; - c3cn->mss_idx = select_mss(c3cn, dst_mtu(dst)); - - reset_wr_list(c3cn); -} - -static int initiate_act_open(struct s3_conn *c3cn, struct net_device *dev) -{ - struct cxgb3i_sdev_data *cdata = NDEV2CDATA(dev); - struct t3cdev *cdev = cdata->cdev; - struct dst_entry *dst = c3cn->dst_cache; - struct sk_buff *skb; - - c3cn_conn_debug("c3cn 0x%p, state %u, flag 0x%lx.\n", - c3cn, c3cn->state, c3cn->flags); - /* - * Initialize connection data. Note that the flags and ULP mode are - * initialized higher up ... - */ - c3cn->dev = dev; - c3cn->cdev = cdev; - c3cn->tid = cxgb3_alloc_atid(cdev, cdata->client, c3cn); - if (c3cn->tid < 0) - goto out_err; - - c3cn->qset = 0; - c3cn->l2t = t3_l2t_get(cdev, dst->neighbour, dev); - if (!c3cn->l2t) - goto free_tid; - - skb = alloc_skb(sizeof(struct cpl_act_open_req), GFP_KERNEL); - if (!skb) - goto free_l2t; - - skb->sk = (struct sock *)c3cn; - set_arp_failure_handler(skb, act_open_req_arp_failure); - - c3cn_hold(c3cn); - - init_offload_conn(c3cn, cdev, dst); - c3cn->err = 0; - - make_act_open_req(c3cn, skb, c3cn->tid, c3cn->l2t); - l2t_send(cdev, skb, c3cn->l2t); - return 0; - -free_l2t: - l2t_release(L2DATA(cdev), c3cn->l2t); -free_tid: - s3_free_atid(cdev, c3cn->tid); - c3cn->tid = 0; -out_err: - return -EINVAL; -} - -/** - * cxgb3i_find_dev - find the interface associated with the given address - * @ipaddr: ip address - */ -static struct net_device * -cxgb3i_find_dev(struct net_device *dev, __be32 ipaddr) -{ - struct flowi fl; - int err; - struct rtable *rt; - - memset(&fl, 0, sizeof(fl)); - fl.nl_u.ip4_u.daddr = ipaddr; - - err = ip_route_output_key(dev ? dev_net(dev) : &init_net, &rt, &fl); - if (!err) - return (&rt->u.dst)->dev; - - return NULL; -} - -/** - * cxgb3i_c3cn_connect - initiates an iscsi tcp connection to a given address - * @c3cn: the iscsi tcp connection - * @usin: destination address - * - * return 0 if active open request is sent, < 0 otherwise. - */ -int cxgb3i_c3cn_connect(struct net_device *dev, struct s3_conn *c3cn, - struct sockaddr_in *usin) -{ - struct rtable *rt; - struct cxgb3i_sdev_data *cdata; - struct t3cdev *cdev; - __be32 sipv4; - struct net_device *dstdev; - int err; - - c3cn_conn_debug("c3cn 0x%p, dev 0x%p.\n", c3cn, dev); - - if (usin->sin_family != AF_INET) - return -EAFNOSUPPORT; - - c3cn->daddr.sin_port = usin->sin_port; - c3cn->daddr.sin_addr.s_addr = usin->sin_addr.s_addr; - - dstdev = cxgb3i_find_dev(dev, usin->sin_addr.s_addr); - if (!dstdev || !is_cxgb3_dev(dstdev)) - return -ENETUNREACH; - - if (dstdev->priv_flags & IFF_802_1Q_VLAN) - dev = dstdev; - - rt = find_route(dev, c3cn->saddr.sin_addr.s_addr, - c3cn->daddr.sin_addr.s_addr, - c3cn->saddr.sin_port, - c3cn->daddr.sin_port); - if (rt == NULL) { - c3cn_conn_debug("NO route to 0x%x, port %u, dev %s.\n", - c3cn->daddr.sin_addr.s_addr, - ntohs(c3cn->daddr.sin_port), - dev ? dev->name : "any"); - return -ENETUNREACH; - } - - if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) { - c3cn_conn_debug("multi-cast route to 0x%x, port %u, dev %s.\n", - c3cn->daddr.sin_addr.s_addr, - ntohs(c3cn->daddr.sin_port), - dev ? dev->name : "any"); - ip_rt_put(rt); - return -ENETUNREACH; - } - - if (!c3cn->saddr.sin_addr.s_addr) - c3cn->saddr.sin_addr.s_addr = rt->rt_src; - - /* now commit destination to connection */ - c3cn->dst_cache = &rt->u.dst; - - /* try to establish an offloaded connection */ - dev = cxgb3_egress_dev(c3cn->dst_cache->dev, c3cn, 0); - if (dev == NULL) { - c3cn_conn_debug("c3cn 0x%p, egress dev NULL.\n", c3cn); - return -ENETUNREACH; - } - cdata = NDEV2CDATA(dev); - cdev = cdata->cdev; - - /* get a source port if one hasn't been provided */ - err = c3cn_get_port(c3cn, cdata); - if (err) - return err; - - c3cn_conn_debug("c3cn 0x%p get port %u.\n", - c3cn, ntohs(c3cn->saddr.sin_port)); - - sipv4 = cxgb3i_get_private_ipv4addr(dev); - if (!sipv4) { - c3cn_conn_debug("c3cn 0x%p, iscsi ip not configured.\n", c3cn); - sipv4 = c3cn->saddr.sin_addr.s_addr; - cxgb3i_set_private_ipv4addr(dev, sipv4); - } else - c3cn->saddr.sin_addr.s_addr = sipv4; - - c3cn_conn_debug("c3cn 0x%p, %pI4,%u-%pI4,%u SYN_SENT.\n", - c3cn, - &c3cn->saddr.sin_addr.s_addr, - ntohs(c3cn->saddr.sin_port), - &c3cn->daddr.sin_addr.s_addr, - ntohs(c3cn->daddr.sin_port)); - - c3cn_set_state(c3cn, C3CN_STATE_CONNECTING); - if (!initiate_act_open(c3cn, dev)) - return 0; - - /* - * If we get here, we don't have an offload connection so simply - * return a failure. - */ - err = -ENOTSUPP; - - /* - * This trashes the connection and releases the local port, - * if necessary. - */ - c3cn_conn_debug("c3cn 0x%p -> CLOSED.\n", c3cn); - c3cn_set_state(c3cn, C3CN_STATE_CLOSED); - ip_rt_put(rt); - c3cn_put_port(c3cn); - return err; -} - -/** - * cxgb3i_c3cn_rx_credits - ack received tcp data. - * @c3cn: iscsi tcp connection - * @copied: # of bytes processed - * - * Called after some received data has been read. It returns RX credits - * to the HW for the amount of data processed. - */ -void cxgb3i_c3cn_rx_credits(struct s3_conn *c3cn, int copied) -{ - struct t3cdev *cdev; - int must_send; - u32 credits, dack = 0; - - if (c3cn->state != C3CN_STATE_ESTABLISHED) - return; - - credits = c3cn->copied_seq - c3cn->rcv_wup; - if (unlikely(!credits)) - return; - - cdev = c3cn->cdev; - - if (unlikely(cxgb3_rx_credit_thres == 0)) - return; - - dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); - - /* - * For coalescing to work effectively ensure the receive window has - * at least 16KB left. - */ - must_send = credits + 16384 >= cxgb3_rcv_win; - - if (must_send || credits >= cxgb3_rx_credit_thres) - c3cn->rcv_wup += send_rx_credits(c3cn, credits, dack); -} - -/** - * cxgb3i_c3cn_send_pdus - send the skbs containing iscsi pdus - * @c3cn: iscsi tcp connection - * @skb: skb contains the iscsi pdu - * - * Add a list of skbs to a connection send queue. The skbs must comply with - * the max size limit of the device and have a headroom of at least - * TX_HEADER_LEN bytes. - * Return # of bytes queued. - */ -int cxgb3i_c3cn_send_pdus(struct s3_conn *c3cn, struct sk_buff *skb) -{ - struct sk_buff *next; - int err, copied = 0; - - spin_lock_bh(&c3cn->lock); - - if (c3cn->state != C3CN_STATE_ESTABLISHED) { - c3cn_tx_debug("c3cn 0x%p, not in est. state %u.\n", - c3cn, c3cn->state); - err = -EAGAIN; - goto out_err; - } - - if (c3cn->err) { - c3cn_tx_debug("c3cn 0x%p, err %d.\n", c3cn, c3cn->err); - err = -EPIPE; - goto out_err; - } - - if (c3cn->write_seq - c3cn->snd_una >= cxgb3_snd_win) { - c3cn_tx_debug("c3cn 0x%p, snd %u - %u > %u.\n", - c3cn, c3cn->write_seq, c3cn->snd_una, - cxgb3_snd_win); - err = -ENOBUFS; - goto out_err; - } - - while (skb) { - int frags = skb_shinfo(skb)->nr_frags + - (skb->len != skb->data_len); - - if (unlikely(skb_headroom(skb) < TX_HEADER_LEN)) { - c3cn_tx_debug("c3cn 0x%p, skb head.\n", c3cn); - err = -EINVAL; - goto out_err; - } - - if (frags >= SKB_WR_LIST_SIZE) { - cxgb3i_log_error("c3cn 0x%p, tx frags %d, len %u,%u.\n", - c3cn, skb_shinfo(skb)->nr_frags, - skb->len, skb->data_len); - err = -EINVAL; - goto out_err; - } - - next = skb->next; - skb->next = NULL; - skb_entail(c3cn, skb, C3CB_FLAG_NO_APPEND | C3CB_FLAG_NEED_HDR); - copied += skb->len; - c3cn->write_seq += skb->len + ulp_extra_len(skb); - skb = next; - } -done: - if (likely(skb_queue_len(&c3cn->write_queue))) - c3cn_push_tx_frames(c3cn, 1); - spin_unlock_bh(&c3cn->lock); - return copied; - -out_err: - if (copied == 0 && err == -EPIPE) - copied = c3cn->err ? c3cn->err : -EPIPE; - else - copied = err; - goto done; -} - -static void sdev_data_cleanup(struct cxgb3i_sdev_data *cdata) -{ - struct adap_ports *ports = &cdata->ports; - struct s3_conn *c3cn; - int i; - - for (i = 0; i < cxgb3_max_connect; i++) { - if (cdata->sport_conn[i]) { - c3cn = cdata->sport_conn[i]; - cdata->sport_conn[i] = NULL; - - spin_lock_bh(&c3cn->lock); - c3cn->cdev = NULL; - c3cn_set_flag(c3cn, C3CN_OFFLOAD_DOWN); - c3cn_closed(c3cn); - spin_unlock_bh(&c3cn->lock); - } - } - - for (i = 0; i < ports->nports; i++) - NDEV2CDATA(ports->lldevs[i]) = NULL; - - cxgb3i_free_big_mem(cdata); -} - -void cxgb3i_sdev_cleanup(void) -{ - struct cxgb3i_sdev_data *cdata; - - write_lock(&cdata_rwlock); - list_for_each_entry(cdata, &cdata_list, list) { - list_del(&cdata->list); - sdev_data_cleanup(cdata); - } - write_unlock(&cdata_rwlock); -} - -int cxgb3i_sdev_init(cxgb3_cpl_handler_func *cpl_handlers) -{ - cpl_handlers[CPL_ACT_ESTABLISH] = do_act_establish; - cpl_handlers[CPL_ACT_OPEN_RPL] = do_act_open_rpl; - cpl_handlers[CPL_PEER_CLOSE] = do_peer_close; - cpl_handlers[CPL_ABORT_REQ_RSS] = do_abort_req; - cpl_handlers[CPL_ABORT_RPL_RSS] = do_abort_rpl; - cpl_handlers[CPL_CLOSE_CON_RPL] = do_close_con_rpl; - cpl_handlers[CPL_TX_DMA_ACK] = do_wr_ack; - cpl_handlers[CPL_ISCSI_HDR] = do_iscsi_hdr; - - if (cxgb3_max_connect > CXGB3I_MAX_CONN) - cxgb3_max_connect = CXGB3I_MAX_CONN; - return 0; -} - -/** - * cxgb3i_sdev_add - allocate and initialize resources for each adapter found - * @cdev: t3cdev adapter - * @client: cxgb3 driver client - */ -void cxgb3i_sdev_add(struct t3cdev *cdev, struct cxgb3_client *client) -{ - struct cxgb3i_sdev_data *cdata; - struct ofld_page_info rx_page_info; - unsigned int wr_len; - int mapsize = cxgb3_max_connect * sizeof(struct s3_conn *); - int i; - - cdata = cxgb3i_alloc_big_mem(sizeof(*cdata) + mapsize, GFP_KERNEL); - if (!cdata) { - cxgb3i_log_warn("t3dev 0x%p, offload up, OOM %d.\n", - cdev, mapsize); - return; - } - - if (cdev->ctl(cdev, GET_WR_LEN, &wr_len) < 0 || - cdev->ctl(cdev, GET_PORTS, &cdata->ports) < 0 || - cdev->ctl(cdev, GET_RX_PAGE_INFO, &rx_page_info) < 0) { - cxgb3i_log_warn("t3dev 0x%p, offload up, ioctl failed.\n", - cdev); - goto free_cdata; - } - - s3_init_wr_tab(wr_len); - - spin_lock_init(&cdata->lock); - INIT_LIST_HEAD(&cdata->list); - cdata->cdev = cdev; - cdata->client = client; - - for (i = 0; i < cdata->ports.nports; i++) - NDEV2CDATA(cdata->ports.lldevs[i]) = cdata; - - write_lock(&cdata_rwlock); - list_add_tail(&cdata->list, &cdata_list); - write_unlock(&cdata_rwlock); - - cxgb3i_log_info("t3dev 0x%p, offload up, added.\n", cdev); - return; - -free_cdata: - cxgb3i_free_big_mem(cdata); -} - -/** - * cxgb3i_sdev_remove - free the allocated resources for the adapter - * @cdev: t3cdev adapter - */ -void cxgb3i_sdev_remove(struct t3cdev *cdev) -{ - struct cxgb3i_sdev_data *cdata = CXGB3_SDEV_DATA(cdev); - - cxgb3i_log_info("t3dev 0x%p, offload down, remove.\n", cdev); - - write_lock(&cdata_rwlock); - list_del(&cdata->list); - write_unlock(&cdata_rwlock); - - sdev_data_cleanup(cdata); -} diff --git a/drivers/scsi/cxgb3i/cxgb3i_offload.h b/drivers/scsi/cxgb3i/cxgb3i_offload.h deleted file mode 100644 index 6a1d86b..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i_offload.h +++ /dev/null @@ -1,243 +0,0 @@ -/* - * cxgb3i_offload.h: Chelsio S3xx iscsi offloaded tcp connection management - * - * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved. - * - * 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 LICENSE file included in this - * release for licensing terms and conditions. - * - * Written by: Dimitris Michailidis (dm@xxxxxxxxxxx) - * Karen Xie (kxie@xxxxxxxxxxx) - */ - -#ifndef _CXGB3I_OFFLOAD_H -#define _CXGB3I_OFFLOAD_H - -#include <linux/skbuff.h> -#include <linux/in.h> - -#include "common.h" -#include "adapter.h" -#include "t3cdev.h" -#include "cxgb3_offload.h" - -#define cxgb3i_log_error(fmt...) printk(KERN_ERR "cxgb3i: ERR! " fmt) -#define cxgb3i_log_warn(fmt...) printk(KERN_WARNING "cxgb3i: WARN! " fmt) -#define cxgb3i_log_info(fmt...) printk(KERN_INFO "cxgb3i: " fmt) -#define cxgb3i_log_debug(fmt, args...) \ - printk(KERN_INFO "cxgb3i: %s - " fmt, __func__ , ## args) - -/** - * struct s3_conn - an iscsi tcp connection structure - * - * @dev: net device of with connection - * @cdev: adapter t3cdev for net device - * @flags: see c3cn_flags below - * @tid: connection id assigned by the h/w - * @qset: queue set used by connection - * @mss_idx: Maximum Segment Size table index - * @l2t: ARP resolution entry for offload packets - * @wr_max: maximum in-flight writes - * @wr_avail: number of writes available - * @wr_unacked: writes since last request for completion notification - * @wr_pending_head: head of pending write queue - * @wr_pending_tail: tail of pending write queue - * @cpl_close: skb for cpl_close_req - * @cpl_abort_req: skb for cpl_abort_req - * @cpl_abort_rpl: skb for cpl_abort_rpl - * @lock: connection status lock - * @refcnt: reference count on connection - * @state: connection state - * @saddr: source ip/port address - * @daddr: destination ip/port address - * @dst_cache: reference to destination route - * @receive_queue: received PDUs - * @write_queue: un-pushed pending writes - * @retry_timer: retry timer for various operations - * @err: connection error status - * @callback_lock: lock for opaque user context - * @user_data: opaque user context - * @rcv_nxt: next receive seq. # - * @copied_seq: head of yet unread data - * @rcv_wup: rcv_nxt on last window update sent - * @snd_nxt: next sequence we send - * @snd_una: first byte we want an ack for - * @write_seq: tail+1 of data held in send buffer - */ -struct s3_conn { - struct net_device *dev; - struct t3cdev *cdev; - unsigned long flags; - int tid; - int qset; - int mss_idx; - struct l2t_entry *l2t; - int wr_max; - int wr_avail; - int wr_unacked; - struct sk_buff *wr_pending_head; - struct sk_buff *wr_pending_tail; - struct sk_buff *cpl_close; - struct sk_buff *cpl_abort_req; - struct sk_buff *cpl_abort_rpl; - spinlock_t lock; - atomic_t refcnt; - volatile unsigned int state; - struct sockaddr_in saddr; - struct sockaddr_in daddr; - struct dst_entry *dst_cache; - struct sk_buff_head receive_queue; - struct sk_buff_head write_queue; - struct timer_list retry_timer; - int err; - rwlock_t callback_lock; - void *user_data; - - u32 rcv_nxt; - u32 copied_seq; - u32 rcv_wup; - u32 snd_nxt; - u32 snd_una; - u32 write_seq; -}; - -/* - * connection state - */ -enum conn_states { - C3CN_STATE_CONNECTING = 1, - C3CN_STATE_ESTABLISHED, - C3CN_STATE_ACTIVE_CLOSE, - C3CN_STATE_PASSIVE_CLOSE, - C3CN_STATE_CLOSE_WAIT_1, - C3CN_STATE_CLOSE_WAIT_2, - C3CN_STATE_ABORTING, - C3CN_STATE_CLOSED, -}; - -static inline unsigned int c3cn_is_closing(const struct s3_conn *c3cn) -{ - return c3cn->state >= C3CN_STATE_ACTIVE_CLOSE; -} -static inline unsigned int c3cn_is_established(const struct s3_conn *c3cn) -{ - return c3cn->state == C3CN_STATE_ESTABLISHED; -} - -/* - * Connection flags -- many to track some close related events. - */ -enum c3cn_flags { - C3CN_ABORT_RPL_RCVD, /* received one ABORT_RPL_RSS message */ - C3CN_ABORT_REQ_RCVD, /* received one ABORT_REQ_RSS message */ - C3CN_ABORT_RPL_PENDING, /* expecting an abort reply */ - C3CN_TX_DATA_SENT, /* already sent a TX_DATA WR */ - C3CN_ACTIVE_CLOSE_NEEDED, /* need to be closed */ - C3CN_OFFLOAD_DOWN /* offload function off */ -}; - -/** - * cxgb3i_sdev_data - Per adapter data. - * Linked off of each Ethernet device port on the adapter. - * Also available via the t3cdev structure since we have pointers to our port - * net_device's there ... - * - * @list: list head to link elements - * @cdev: t3cdev adapter - * @client: CPL client pointer - * @ports: array of adapter ports - * @sport_next: next port - * @sport_conn: source port connection - */ -struct cxgb3i_sdev_data { - struct list_head list; - struct t3cdev *cdev; - struct cxgb3_client *client; - struct adap_ports ports; - spinlock_t lock; - unsigned int sport_next; - struct s3_conn *sport_conn[0]; -}; -#define NDEV2CDATA(ndev) (*(struct cxgb3i_sdev_data **)&(ndev)->ec_ptr) -#define CXGB3_SDEV_DATA(cdev) NDEV2CDATA((cdev)->lldev) - -void cxgb3i_sdev_cleanup(void); -int cxgb3i_sdev_init(cxgb3_cpl_handler_func *); -void cxgb3i_sdev_add(struct t3cdev *, struct cxgb3_client *); -void cxgb3i_sdev_remove(struct t3cdev *); - -struct s3_conn *cxgb3i_c3cn_create(void); -int cxgb3i_c3cn_connect(struct net_device *, struct s3_conn *, - struct sockaddr_in *); -void cxgb3i_c3cn_rx_credits(struct s3_conn *, int); -int cxgb3i_c3cn_send_pdus(struct s3_conn *, struct sk_buff *); -void cxgb3i_c3cn_release(struct s3_conn *); - -/** - * cxgb3_skb_cb - control block for received pdu state and ULP mode management. - * - * @flag: see C3CB_FLAG_* below - * @ulp_mode: ULP mode/submode of sk_buff - * @seq: tcp sequence number - */ -struct cxgb3_skb_rx_cb { - __u32 ddigest; /* data digest */ - __u32 pdulen; /* recovered pdu length */ -}; - -struct cxgb3_skb_tx_cb { - struct sk_buff *wr_next; /* next wr */ -}; - -struct cxgb3_skb_cb { - __u8 flags; - __u8 ulp_mode; - __u32 seq; - union { - struct cxgb3_skb_rx_cb rx; - struct cxgb3_skb_tx_cb tx; - }; -}; - -#define CXGB3_SKB_CB(skb) ((struct cxgb3_skb_cb *)&((skb)->cb[0])) -#define skb_flags(skb) (CXGB3_SKB_CB(skb)->flags) -#define skb_ulp_mode(skb) (CXGB3_SKB_CB(skb)->ulp_mode) -#define skb_tcp_seq(skb) (CXGB3_SKB_CB(skb)->seq) -#define skb_rx_ddigest(skb) (CXGB3_SKB_CB(skb)->rx.ddigest) -#define skb_rx_pdulen(skb) (CXGB3_SKB_CB(skb)->rx.pdulen) -#define skb_tx_wr_next(skb) (CXGB3_SKB_CB(skb)->tx.wr_next) - -enum c3cb_flags { - C3CB_FLAG_NEED_HDR = 1 << 0, /* packet needs a TX_DATA_WR header */ - C3CB_FLAG_NO_APPEND = 1 << 1, /* don't grow this skb */ - C3CB_FLAG_COMPL = 1 << 2, /* request WR completion */ -}; - -/** - * sge_opaque_hdr - - * Opaque version of structure the SGE stores at skb->head of TX_DATA packets - * and for which we must reserve space. - */ -struct sge_opaque_hdr { - void *dev; - dma_addr_t addr[MAX_SKB_FRAGS + 1]; -}; - -/* for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */ -#define TX_HEADER_LEN \ - (sizeof(struct tx_data_wr) + sizeof(struct sge_opaque_hdr)) -#define SKB_TX_HEADROOM SKB_MAX_HEAD(TX_HEADER_LEN) - -/* - * get and set private ip for iscsi traffic - */ -#define cxgb3i_get_private_ipv4addr(ndev) \ - (((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr) -#define cxgb3i_set_private_ipv4addr(ndev, addr) \ - (((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr) = addr - -/* max. connections per adapter */ -#define CXGB3I_MAX_CONN 16384 -#endif /* _CXGB3_OFFLOAD_H */ diff --git a/drivers/scsi/cxgb3i/cxgb3i_pdu.c b/drivers/scsi/cxgb3i/cxgb3i_pdu.c deleted file mode 100644 index dc5e3e7..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i_pdu.c +++ /dev/null @@ -1,495 +0,0 @@ -/* - * cxgb3i_pdu.c: Chelsio S3xx iSCSI driver. - * - * Copyright (c) 2008 Chelsio Communications, Inc. - * Copyright (c) 2008 Mike Christie - * Copyright (c) 2008 Red Hat, Inc. All rights reserved. - * - * 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. - * - * Written by: Karen Xie (kxie@xxxxxxxxxxx) - */ - -#include <linux/slab.h> -#include <linux/skbuff.h> -#include <linux/crypto.h> -#include <scsi/scsi_cmnd.h> -#include <scsi/scsi_host.h> - -#include "cxgb3i.h" -#include "cxgb3i_pdu.h" - -#ifdef __DEBUG_CXGB3I_RX__ -#define cxgb3i_rx_debug cxgb3i_log_debug -#else -#define cxgb3i_rx_debug(fmt...) -#endif - -#ifdef __DEBUG_CXGB3I_TX__ -#define cxgb3i_tx_debug cxgb3i_log_debug -#else -#define cxgb3i_tx_debug(fmt...) -#endif - -/* always allocate rooms for AHS */ -#define SKB_TX_PDU_HEADER_LEN \ - (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE) -static unsigned int skb_extra_headroom; -static struct page *pad_page; - -/* - * pdu receive, interact with libiscsi_tcp - */ -static inline int read_pdu_skb(struct iscsi_conn *conn, struct sk_buff *skb, - unsigned int offset, int offloaded) -{ - int status = 0; - int bytes_read; - - bytes_read = iscsi_tcp_recv_skb(conn, skb, offset, offloaded, &status); - switch (status) { - case ISCSI_TCP_CONN_ERR: - return -EIO; - case ISCSI_TCP_SUSPENDED: - /* no transfer - just have caller flush queue */ - return bytes_read; - case ISCSI_TCP_SKB_DONE: - /* - * pdus should always fit in the skb and we should get - * segment done notifcation. - */ - iscsi_conn_printk(KERN_ERR, conn, "Invalid pdu or skb."); - return -EFAULT; - case ISCSI_TCP_SEGMENT_DONE: - return bytes_read; - default: - iscsi_conn_printk(KERN_ERR, conn, "Invalid iscsi_tcp_recv_skb " - "status %d\n", status); - return -EINVAL; - } -} - -static int cxgb3i_conn_read_pdu_skb(struct iscsi_conn *conn, - struct sk_buff *skb) -{ - struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - bool offloaded = 0; - unsigned int offset; - int rc; - - cxgb3i_rx_debug("conn 0x%p, skb 0x%p, len %u, flag 0x%x.\n", - conn, skb, skb->len, skb_ulp_mode(skb)); - - if (!iscsi_tcp_recv_segment_is_hdr(tcp_conn)) { - iscsi_conn_failure(conn, ISCSI_ERR_PROTO); - return -EIO; - } - - if (conn->hdrdgst_en && (skb_ulp_mode(skb) & ULP2_FLAG_HCRC_ERROR)) { - iscsi_conn_failure(conn, ISCSI_ERR_HDR_DGST); - return -EIO; - } - - if (conn->datadgst_en && (skb_ulp_mode(skb) & ULP2_FLAG_DCRC_ERROR)) { - iscsi_conn_failure(conn, ISCSI_ERR_DATA_DGST); - return -EIO; - } - - /* iscsi hdr */ - rc = read_pdu_skb(conn, skb, 0, 0); - if (rc <= 0) - return rc; - - if (iscsi_tcp_recv_segment_is_hdr(tcp_conn)) - return 0; - - offset = rc; - if (conn->hdrdgst_en) - offset += ISCSI_DIGEST_SIZE; - - /* iscsi data */ - if (skb_ulp_mode(skb) & ULP2_FLAG_DATA_DDPED) { - cxgb3i_rx_debug("skb 0x%p, opcode 0x%x, data %u, ddp'ed, " - "itt 0x%x.\n", - skb, - tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK, - tcp_conn->in.datalen, - ntohl(tcp_conn->in.hdr->itt)); - offloaded = 1; - } else { - cxgb3i_rx_debug("skb 0x%p, opcode 0x%x, data %u, NOT ddp'ed, " - "itt 0x%x.\n", - skb, - tcp_conn->in.hdr->opcode & ISCSI_OPCODE_MASK, - tcp_conn->in.datalen, - ntohl(tcp_conn->in.hdr->itt)); - offset += sizeof(struct cpl_iscsi_hdr_norss); - } - - rc = read_pdu_skb(conn, skb, offset, offloaded); - if (rc < 0) - return rc; - else - return 0; -} - -/* - * pdu transmit, interact with libiscsi_tcp - */ -static inline void tx_skb_setmode(struct sk_buff *skb, int hcrc, int dcrc) -{ - u8 submode = 0; - - if (hcrc) - submode |= 1; - if (dcrc) - submode |= 2; - skb_ulp_mode(skb) = (ULP_MODE_ISCSI << 4) | submode; -} - -void cxgb3i_conn_cleanup_task(struct iscsi_task *task) -{ - struct cxgb3i_task_data *tdata = task->dd_data + - sizeof(struct iscsi_tcp_task); - - /* never reached the xmit task callout */ - if (tdata->skb) - __kfree_skb(tdata->skb); - memset(tdata, 0, sizeof(struct cxgb3i_task_data)); - - /* MNC - Do we need a check in case this is called but - * cxgb3i_conn_alloc_pdu has never been called on the task */ - cxgb3i_release_itt(task, task->hdr_itt); - iscsi_tcp_cleanup_task(task); -} - -static int sgl_seek_offset(struct scatterlist *sgl, unsigned int sgcnt, - unsigned int offset, unsigned int *off, - struct scatterlist **sgp) -{ - int i; - struct scatterlist *sg; - - for_each_sg(sgl, sg, sgcnt, i) { - if (offset < sg->length) { - *off = offset; - *sgp = sg; - return 0; - } - offset -= sg->length; - } - return -EFAULT; -} - -static int sgl_read_to_frags(struct scatterlist *sg, unsigned int sgoffset, - unsigned int dlen, skb_frag_t *frags, - int frag_max) -{ - unsigned int datalen = dlen; - unsigned int sglen = sg->length - sgoffset; - struct page *page = sg_page(sg); - int i; - - i = 0; - do { - unsigned int copy; - - if (!sglen) { - sg = sg_next(sg); - if (!sg) { - cxgb3i_log_error("%s, sg NULL, len %u/%u.\n", - __func__, datalen, dlen); - return -EINVAL; - } - sgoffset = 0; - sglen = sg->length; - page = sg_page(sg); - - } - copy = min(datalen, sglen); - if (i && page == frags[i - 1].page && - sgoffset + sg->offset == - frags[i - 1].page_offset + frags[i - 1].size) { - frags[i - 1].size += copy; - } else { - if (i >= frag_max) { - cxgb3i_log_error("%s, too many pages %u, " - "dlen %u.\n", __func__, - frag_max, dlen); - return -EINVAL; - } - - frags[i].page = page; - frags[i].page_offset = sg->offset + sgoffset; - frags[i].size = copy; - i++; - } - datalen -= copy; - sgoffset += copy; - sglen -= copy; - } while (datalen); - - return i; -} - -int cxgb3i_conn_alloc_pdu(struct iscsi_task *task, u8 opcode) -{ - struct iscsi_conn *conn = task->conn; - struct iscsi_tcp_task *tcp_task = task->dd_data; - struct cxgb3i_task_data *tdata = task->dd_data + sizeof(*tcp_task); - struct scsi_cmnd *sc = task->sc; - int headroom = SKB_TX_PDU_HEADER_LEN; - - tcp_task->dd_data = tdata; - task->hdr = NULL; - - /* write command, need to send data pdus */ - if (skb_extra_headroom && (opcode == ISCSI_OP_SCSI_DATA_OUT || - (opcode == ISCSI_OP_SCSI_CMD && - (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_TO_DEVICE)))) - headroom += min(skb_extra_headroom, conn->max_xmit_dlength); - - tdata->skb = alloc_skb(TX_HEADER_LEN + headroom, GFP_ATOMIC); - if (!tdata->skb) - return -ENOMEM; - skb_reserve(tdata->skb, TX_HEADER_LEN); - - cxgb3i_tx_debug("task 0x%p, opcode 0x%x, skb 0x%p.\n", - task, opcode, tdata->skb); - - task->hdr = (struct iscsi_hdr *)tdata->skb->data; - task->hdr_max = SKB_TX_PDU_HEADER_LEN; - - /* data_out uses scsi_cmd's itt */ - if (opcode != ISCSI_OP_SCSI_DATA_OUT) - cxgb3i_reserve_itt(task, &task->hdr->itt); - - return 0; -} - -int cxgb3i_conn_init_pdu(struct iscsi_task *task, unsigned int offset, - unsigned int count) -{ - struct iscsi_conn *conn = task->conn; - struct iscsi_tcp_task *tcp_task = task->dd_data; - struct cxgb3i_task_data *tdata = tcp_task->dd_data; - struct sk_buff *skb = tdata->skb; - unsigned int datalen = count; - int i, padlen = iscsi_padding(count); - struct page *pg; - - cxgb3i_tx_debug("task 0x%p,0x%p, offset %u, count %u, skb 0x%p.\n", - task, task->sc, offset, count, skb); - - skb_put(skb, task->hdr_len); - tx_skb_setmode(skb, conn->hdrdgst_en, datalen ? conn->datadgst_en : 0); - if (!count) - return 0; - - if (task->sc) { - struct scsi_data_buffer *sdb = scsi_out(task->sc); - struct scatterlist *sg = NULL; - int err; - - tdata->offset = offset; - tdata->count = count; - err = sgl_seek_offset(sdb->table.sgl, sdb->table.nents, - tdata->offset, &tdata->sgoffset, &sg); - if (err < 0) { - cxgb3i_log_warn("tpdu, sgl %u, bad offset %u/%u.\n", - sdb->table.nents, tdata->offset, - sdb->length); - return err; - } - err = sgl_read_to_frags(sg, tdata->sgoffset, tdata->count, - tdata->frags, MAX_PDU_FRAGS); - if (err < 0) { - cxgb3i_log_warn("tpdu, sgl %u, bad offset %u + %u.\n", - sdb->table.nents, tdata->offset, - tdata->count); - return err; - } - tdata->nr_frags = err; - - if (tdata->nr_frags > MAX_SKB_FRAGS || - (padlen && tdata->nr_frags == MAX_SKB_FRAGS)) { - char *dst = skb->data + task->hdr_len; - skb_frag_t *frag = tdata->frags; - - /* data fits in the skb's headroom */ - for (i = 0; i < tdata->nr_frags; i++, frag++) { - char *src = kmap_atomic(frag->page, - KM_SOFTIRQ0); - - memcpy(dst, src+frag->page_offset, frag->size); - dst += frag->size; - kunmap_atomic(src, KM_SOFTIRQ0); - } - if (padlen) { - memset(dst, 0, padlen); - padlen = 0; - } - skb_put(skb, count + padlen); - } else { - /* data fit into frag_list */ - for (i = 0; i < tdata->nr_frags; i++) - get_page(tdata->frags[i].page); - - memcpy(skb_shinfo(skb)->frags, tdata->frags, - sizeof(skb_frag_t) * tdata->nr_frags); - skb_shinfo(skb)->nr_frags = tdata->nr_frags; - skb->len += count; - skb->data_len += count; - skb->truesize += count; - } - - } else { - pg = virt_to_page(task->data); - - get_page(pg); - skb_fill_page_desc(skb, 0, pg, offset_in_page(task->data), - count); - skb->len += count; - skb->data_len += count; - skb->truesize += count; - } - - if (padlen) { - i = skb_shinfo(skb)->nr_frags; - get_page(pad_page); - skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, pad_page, 0, - padlen); - - skb->data_len += padlen; - skb->truesize += padlen; - skb->len += padlen; - } - - return 0; -} - -int cxgb3i_conn_xmit_pdu(struct iscsi_task *task) -{ - struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; - struct cxgb3i_conn *cconn = tcp_conn->dd_data; - struct iscsi_tcp_task *tcp_task = task->dd_data; - struct cxgb3i_task_data *tdata = tcp_task->dd_data; - struct sk_buff *skb = tdata->skb; - unsigned int datalen; - int err; - - if (!skb) - return 0; - - datalen = skb->data_len; - tdata->skb = NULL; - err = cxgb3i_c3cn_send_pdus(cconn->cep->c3cn, skb); - if (err > 0) { - int pdulen = err; - - cxgb3i_tx_debug("task 0x%p, skb 0x%p, len %u/%u, rv %d.\n", - task, skb, skb->len, skb->data_len, err); - - if (task->conn->hdrdgst_en) - pdulen += ISCSI_DIGEST_SIZE; - if (datalen && task->conn->datadgst_en) - pdulen += ISCSI_DIGEST_SIZE; - - task->conn->txdata_octets += pdulen; - return 0; - } - - if (err == -EAGAIN || err == -ENOBUFS) { - /* reset skb to send when we are called again */ - tdata->skb = skb; - return err; - } - - kfree_skb(skb); - cxgb3i_tx_debug("itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n", - task->itt, skb, skb->len, skb->data_len, err); - iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err); - iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED); - return err; -} - -int cxgb3i_pdu_init(void) -{ - if (SKB_TX_HEADROOM > (512 * MAX_SKB_FRAGS)) - skb_extra_headroom = SKB_TX_HEADROOM; - pad_page = alloc_page(GFP_KERNEL); - if (!pad_page) - return -ENOMEM; - memset(page_address(pad_page), 0, PAGE_SIZE); - return 0; -} - -void cxgb3i_pdu_cleanup(void) -{ - if (pad_page) { - __free_page(pad_page); - pad_page = NULL; - } -} - -void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn) -{ - struct sk_buff *skb; - unsigned int read = 0; - struct iscsi_conn *conn = c3cn->user_data; - int err = 0; - - cxgb3i_rx_debug("cn 0x%p.\n", c3cn); - - read_lock(&c3cn->callback_lock); - if (unlikely(!conn || conn->suspend_rx)) { - cxgb3i_rx_debug("conn 0x%p, id %d, suspend_rx %lu!\n", - conn, conn ? conn->id : 0xFF, - conn ? conn->suspend_rx : 0xFF); - read_unlock(&c3cn->callback_lock); - return; - } - skb = skb_peek(&c3cn->receive_queue); - while (!err && skb) { - __skb_unlink(skb, &c3cn->receive_queue); - read += skb_rx_pdulen(skb); - cxgb3i_rx_debug("conn 0x%p, cn 0x%p, rx skb 0x%p, pdulen %u.\n", - conn, c3cn, skb, skb_rx_pdulen(skb)); - err = cxgb3i_conn_read_pdu_skb(conn, skb); - __kfree_skb(skb); - skb = skb_peek(&c3cn->receive_queue); - } - read_unlock(&c3cn->callback_lock); - c3cn->copied_seq += read; - cxgb3i_c3cn_rx_credits(c3cn, read); - conn->rxdata_octets += read; - - if (err) { - cxgb3i_log_info("conn 0x%p rx failed err %d.\n", conn, err); - iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); - } -} - -void cxgb3i_conn_tx_open(struct s3_conn *c3cn) -{ - struct iscsi_conn *conn = c3cn->user_data; - - cxgb3i_tx_debug("cn 0x%p.\n", c3cn); - if (conn) { - cxgb3i_tx_debug("cn 0x%p, cid %d.\n", c3cn, conn->id); - iscsi_conn_queue_work(conn); - } -} - -void cxgb3i_conn_closing(struct s3_conn *c3cn) -{ - struct iscsi_conn *conn; - - read_lock(&c3cn->callback_lock); - conn = c3cn->user_data; - if (conn && c3cn->state != C3CN_STATE_ESTABLISHED) - iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED); - read_unlock(&c3cn->callback_lock); -} diff --git a/drivers/scsi/cxgb3i/cxgb3i_pdu.h b/drivers/scsi/cxgb3i/cxgb3i_pdu.h deleted file mode 100644 index 0770b23..0000000 --- a/drivers/scsi/cxgb3i/cxgb3i_pdu.h +++ /dev/null @@ -1,59 +0,0 @@ -/* - * cxgb3i_ulp2.h: Chelsio S3xx iSCSI driver. - * - * Copyright (c) 2008 Chelsio Communications, 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. - * - * Written by: Karen Xie (kxie@xxxxxxxxxxx) - */ - -#ifndef __CXGB3I_ULP2_PDU_H__ -#define __CXGB3I_ULP2_PDU_H__ - -struct cpl_iscsi_hdr_norss { - union opcode_tid ot; - u16 pdu_len_ddp; - u16 len; - u32 seq; - u16 urg; - u8 rsvd; - u8 status; -}; - -struct cpl_rx_data_ddp_norss { - union opcode_tid ot; - u16 urg; - u16 len; - u32 seq; - u32 nxt_seq; - u32 ulp_crc; - u32 ddp_status; -}; - -#define RX_DDP_STATUS_IPP_SHIFT 27 /* invalid pagepod */ -#define RX_DDP_STATUS_TID_SHIFT 26 /* tid mismatch */ -#define RX_DDP_STATUS_COLOR_SHIFT 25 /* color mismatch */ -#define RX_DDP_STATUS_OFFSET_SHIFT 24 /* offset mismatch */ -#define RX_DDP_STATUS_ULIMIT_SHIFT 23 /* ulimit error */ -#define RX_DDP_STATUS_TAG_SHIFT 22 /* tag mismatch */ -#define RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */ -#define RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */ -#define RX_DDP_STATUS_PAD_SHIFT 19 /* pad error */ -#define RX_DDP_STATUS_PPP_SHIFT 18 /* pagepod parity error */ -#define RX_DDP_STATUS_LLIMIT_SHIFT 17 /* llimit error */ -#define RX_DDP_STATUS_DDP_SHIFT 16 /* ddp'able */ -#define RX_DDP_STATUS_PMM_SHIFT 15 /* pagepod mismatch */ - -#define ULP2_FLAG_DATA_READY 0x1 -#define ULP2_FLAG_DATA_DDPED 0x2 -#define ULP2_FLAG_HCRC_ERROR 0x10 -#define ULP2_FLAG_DCRC_ERROR 0x20 -#define ULP2_FLAG_PAD_ERROR 0x40 - -void cxgb3i_conn_closing(struct s3_conn *c3cn); -void cxgb3i_conn_pdu_ready(struct s3_conn *c3cn); -void cxgb3i_conn_tx_open(struct s3_conn *c3cn); -#endif diff --git a/drivers/scsi/cxgbi/Kconfig b/drivers/scsi/cxgbi/Kconfig index 96c887a..17eb5d5 100644 --- a/drivers/scsi/cxgbi/Kconfig +++ b/drivers/scsi/cxgbi/Kconfig @@ -1,7 +1,2 @@ -config SCSI_CXGB4_ISCSI - tristate "Chelsio T4 iSCSI support" - depends on CHELSIO_T4_DEPENDS - select CHELSIO_T4 - select SCSI_ISCSI_ATTRS - ---help--- - This driver supports iSCSI offload for the Chelsio T4 devices. +source "drivers/scsi/cxgbi/cxgb3i/Kconfig" +source "drivers/scsi/cxgbi/cxgb4i/Kconfig" diff --git a/drivers/scsi/cxgbi/Makefile b/drivers/scsi/cxgbi/Makefile index 9e8f604..86007e3 100644 --- a/drivers/scsi/cxgbi/Makefile +++ b/drivers/scsi/cxgbi/Makefile @@ -1 +1,2 @@ +obj-$(CONFIG_SCSI_CXGB3_ISCSI) += libcxgbi.o cxgb3i/ obj-$(CONFIG_SCSI_CXGB4_ISCSI) += libcxgbi.o cxgb4i/ diff --git a/drivers/scsi/cxgbi/cxgb3i/Kbuild b/drivers/scsi/cxgbi/cxgb3i/Kbuild new file mode 100644 index 0000000..09dbf9e --- /dev/null +++ b/drivers/scsi/cxgbi/cxgb3i/Kbuild @@ -0,0 +1,3 @@ +EXTRA_CFLAGS += -I$(srctree)/drivers/net/cxgb3 + +obj-$(CONFIG_SCSI_CXGB3_ISCSI) += cxgb3i.o diff --git a/drivers/scsi/cxgbi/cxgb3i/Kconfig b/drivers/scsi/cxgbi/cxgb3i/Kconfig new file mode 100644 index 0000000..cf6f4b2 --- /dev/null +++ b/drivers/scsi/cxgbi/cxgb3i/Kconfig @@ -0,0 +1,7 @@ +config SCSI_CXGB3_ISCSI + tristate "Chelsio T3 iSCSI support" + depends on CHELSIO_T3_DEPENDS + select CHELSIO_T3 + select SCSI_ISCSI_ATTRS + ---help--- + This driver supports iSCSI offload for the Chelsio T3 devices. diff --git a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c new file mode 100644 index 0000000..ec0f121 --- /dev/null +++ b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c @@ -0,0 +1,1372 @@ +/* + * cxgb3i_offload.c: Chelsio S3xx iscsi offloaded tcp connection management + * + * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved. + * + * 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 LICENSE file included in this + * release for licensing terms and conditions. + * + * Written by: Dimitris Michailidis (dm@xxxxxxxxxxx) + * Karen Xie (kxie@xxxxxxxxxxx) + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <scsi/scsi_host.h> + +#include "common.h" +#include "t3_cpl.h" +#include "t3cdev.h" +#include "cxgb3_defs.h" +#include "cxgb3_ctl_defs.h" +#include "cxgb3_offload.h" +#include "firmware_exports.h" + +#include "cxgb3i.h" + +#define DRV_MODULE_NAME "cxgb3i" +#define DRV_MODULE_DESC "Chelsio T3 iSCSI Driver" +#define DRV_MODULE_VERSION "2.0.0" +#define DRV_MODULE_RELDATE "Jun. 2010" + +static char version[] = + DRV_MODULE_DESC " " DRV_MODULE_NAME + " v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; + +MODULE_AUTHOR("Chelsio Communications, Inc."); +MODULE_DESCRIPTION(DRV_MODULE_DESC); +MODULE_VERSION(DRV_MODULE_VERSION); +MODULE_LICENSE("GPL"); + +unsigned int dbg_level; +module_param(dbg_level, uint, 0644); +MODULE_PARM_DESC(dbg_level, "debug flag (default=0)"); + +static int cxgb3i_rcv_win = 256 * 1024; +module_param(cxgb3i_rcv_win, int, 0644); +MODULE_PARM_DESC(cxgb3i_rcv_win, "TCP receive window in bytes (default=256KB)"); + +static int cxgb3i_snd_win = 128 * 1024; +module_param(cxgb3i_snd_win, int, 0644); +MODULE_PARM_DESC(cxgb3i_snd_win, "TCP send window in bytes (default=128KB)"); + +static int cxgb3i_rx_credit_thres = 10 * 1024; +module_param(cxgb3i_rx_credit_thres, int, 0644); +MODULE_PARM_DESC(rx_credit_thres, + "RX credits return threshold in bytes (default=10KB)"); + +static unsigned int cxgb3i_max_connect = 8 * 1024; +module_param(cxgb3i_max_connect, uint, 0644); +MODULE_PARM_DESC(cxgb3i_max_connect, "Max. # of connections (default=8092)"); + +static unsigned int cxgb3i_sport_base = 20000; +module_param(cxgb3i_sport_base, uint, 0644); +MODULE_PARM_DESC(cxgb3i_sport_base, "starting port number (default=20000)"); + +#define cxgb3i_log_error cxgbi_dbg_error +#define cxgb3i_log_warn cxgbi_dbg_warn +#define cxgb3i_log_info cxgbi_dbg_info +#define cxgb3i_log_debug(flag, fmt, args...) \ + cxgbi_dbg_print(flag, fmt, ## args) + +static void cxgb3i_dev_open(struct t3cdev *); +static void cxgb3i_dev_close(struct t3cdev *); +static void cxgb3i_dev_event_handler(struct t3cdev *, u32, u32); + +static struct cxgb3_client t3_client = { + .name = DRV_MODULE_NAME, + .handlers = cxgb3i_cpl_handlers, + .add = cxgb3i_dev_open, + .remove = cxgb3i_dev_close, + .event_handler = cxgb3i_dev_event_handler, +}; + +static struct scsi_host_template cxgb3i_host_template = { + .module = THIS_MODULE, + .name = DRV_MODULE_NAME, + .proc_name = DRV_MODULE_NAME, + .can_queue = CXGB3I_SCSI_HOST_QDEPTH, +}; + +static struct iscsi_transport cxgb3i_iscsi_transport = { + .owner = THIS_MODULE, + .name = DRV_MODULE_NAME, +}; + +/* + * CPL (Chelsio Protocol Language) defines a message passing interface between + * the host driver and Chelsio asic. + * The section below implments CPLs that related to iscsi tcp connection + * open/close/abort and data send/receive. + */ + +static int push_tx_frames(struct cxgbi_sock *csk, int req_completion); + +static void send_act_open_req(struct cxgbi_sock *csk, struct sk_buff *skb, + const struct l2t_entry *e) +{ + unsigned int wscale = cxgbi_sock_compute_wscale(cxgb3i_rcv_win); + struct cpl_act_open_req *req = (struct cpl_act_open_req *)skb->head; + + skb->priority = CPL_PRIORITY_SETUP; + + req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); + OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, csk->atid)); + req->local_port = csk->saddr.sin_port; + req->peer_port = csk->daddr.sin_port; + req->local_ip = csk->saddr.sin_addr.s_addr; + req->peer_ip = csk->daddr.sin_addr.s_addr; + + req->opt0h = htonl(V_KEEP_ALIVE(1) | F_TCAM_BYPASS | + V_WND_SCALE(wscale) | V_MSS_IDX(csk->mss_idx) | + V_L2T_IDX(e->idx) | V_TX_CHANNEL(e->smt_idx)); + req->opt0l = htonl(V_ULP_MODE(ULP2_MODE_ISCSI) | + V_RCV_BUFSIZ(cxgb3i_rcv_win>>10)); + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u, %pI4:%u-%pI4:%u, %u,%u,%u.\n", + csk, csk->state, csk->flags, csk->atid, + &req->local_ip, ntohs(req->local_port), + &req->peer_ip, ntohs(req->peer_port), + csk->mss_idx, e->idx, e->smt_idx); + + l2t_send(csk->cdev->lldev, skb, csk->l2t); +} + +static inline void act_open_arp_failure(struct t3cdev *dev, struct sk_buff *skb) +{ + cxgbi_sock_act_open_req_arp_failure(NULL, skb); +} + +/* + * CPL connection close request: host -> + * + * Close a connection by sending a CPL_CLOSE_CON_REQ message and queue it to + * the write queue (i.e., after any unsent txt data). + */ +static void send_close_req(struct cxgbi_sock *csk) +{ + struct sk_buff *skb = csk->cpl_close; + struct cpl_close_con_req *req = (struct cpl_close_con_req *)skb->head; + unsigned int tid = csk->tid; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u.\n", + csk, csk->state, csk->flags, csk->tid); + + csk->cpl_close = NULL; + req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); + req->wr.wr_lo = htonl(V_WR_TID(tid)); + OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, tid)); + req->rsvd = htonl(csk->write_seq); + + cxgbi_sock_skb_entail(csk, skb); + if (csk->state >= CTP_ESTABLISHED) + push_tx_frames(csk, 1); +} + +/* + * CPL connection abort request: host -> + * + * Send an ABORT_REQ message. Makes sure we do not send multiple ABORT_REQs + * for the same connection and also that we do not try to send a message + * after the connection has closed. + */ +static void abort_arp_failure(struct t3cdev *tdev, struct sk_buff *skb) +{ + struct cpl_abort_req *req = cplhdr(skb); + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE, + "t3dev 0x%p, skb 0x%p.\n", tdev, skb); + req->cmd = CPL_ABORT_NO_RST; + cxgb3_ofld_send(tdev, skb); +} + +static void send_abort_req(struct cxgbi_sock *csk) +{ + struct sk_buff *skb = csk->cpl_abort_req; + struct cpl_abort_req *req; + + if (unlikely(csk->state == CTP_ABORTING || !skb)) + return; + cxgbi_sock_set_state(csk, CTP_ABORTING); + cxgbi_sock_set_flag(csk, CTPF_ABORT_RPL_PENDING); + /* Purge the send queue so we don't send anything after an abort. */ + cxgbi_sock_purge_write_queue(csk); + + csk->cpl_abort_req = NULL; + req = (struct cpl_abort_req *)skb->head; + skb->priority = CPL_PRIORITY_DATA; + set_arp_failure_handler(skb, abort_arp_failure); + req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); + req->wr.wr_lo = htonl(V_WR_TID(csk->tid)); + OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, csk->tid)); + req->rsvd0 = htonl(csk->snd_nxt); + req->rsvd1 = !cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT); + req->cmd = CPL_ABORT_SEND_RST; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u, snd_nxt %u, 0x%x.\n", + csk, csk->state, csk->flags, csk->tid, csk->snd_nxt, + req->rsvd1); + + l2t_send(csk->cdev->lldev, skb, csk->l2t); +} + +/* + * CPL connection abort reply: host -> + * + * Send an ABORT_RPL message in response of the ABORT_REQ received. + */ +static void send_abort_rpl(struct cxgbi_sock *csk, int rst_status) +{ + struct sk_buff *skb = csk->cpl_abort_rpl; + struct cpl_abort_rpl *rpl = (struct cpl_abort_rpl *)skb->head; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u, status %d.\n", + csk, csk->state, csk->flags, csk->tid, rst_status); + + csk->cpl_abort_rpl = NULL; + skb->priority = CPL_PRIORITY_DATA; + rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); + rpl->wr.wr_lo = htonl(V_WR_TID(csk->tid)); + OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, csk->tid)); + rpl->cmd = rst_status; + cxgb3_ofld_send(csk->cdev->lldev, skb); +} + +/* + * CPL connection rx data ack: host -> + * Send RX credits through an RX_DATA_ACK CPL message. Returns the number of + * credits sent. + */ +static u32 send_rx_credits(struct cxgbi_sock *csk, u32 credits) +{ + struct sk_buff *skb; + struct cpl_rx_data_ack *req; + u32 dack = F_RX_DACK_CHANGE | V_RX_DACK_MODE(1); + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u, credit %u, dack %u\n", + csk, csk->state, csk->flags, csk->tid, credits, dack); + + skb = alloc_cpl(sizeof(*req), 0, GFP_ATOMIC); + if (!skb) { + cxgb3i_log_info("csk 0x%p, credit %u, OOM.\n", csk, credits); + return 0; + } + req = (struct cpl_rx_data_ack *)skb->head; + req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); + OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, csk->tid)); + req->credit_dack = htonl(F_RX_DACK_CHANGE | V_RX_DACK_MODE(1) | + V_RX_CREDITS(credits)); + skb->priority = CPL_PRIORITY_ACK; + cxgb3_ofld_send(csk->cdev->lldev, skb); + return credits; +} + +/* + * CPL connection tx data: host -> + * + * Send iscsi PDU via TX_DATA CPL message. Returns the number of + * credits sent. + * Each TX_DATA consumes work request credit (wrs), so we need to keep track of + * how many we've used so far and how many are pending (i.e., yet ack'ed by T3). + */ + +static unsigned int wrlen __read_mostly; +static unsigned int skb_wrs[SKB_WR_LIST_SIZE] __read_mostly; + +static void init_wr_tab(unsigned int wr_len) +{ + int i; + + if (skb_wrs[1]) /* already initialized */ + return; + for (i = 1; i < SKB_WR_LIST_SIZE; i++) { + int sgl_len = (3 * i) / 2 + (i & 1); + + sgl_len += 3; + skb_wrs[i] = (sgl_len <= wr_len + ? 1 : 1 + (sgl_len - 2) / (wr_len - 1)); + } + wrlen = wr_len * 8; +} + +static inline void make_tx_data_wr(struct cxgbi_sock *csk, struct sk_buff *skb, + int len, int req_completion) +{ + struct tx_data_wr *req; + struct l2t_entry *l2t = csk->l2t; + + skb_reset_transport_header(skb); + req = (struct tx_data_wr *)__skb_push(skb, sizeof(*req)); + req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA) | + (req_completion ? F_WR_COMPL : 0)); + req->wr_lo = htonl(V_WR_TID(csk->tid)); + /* len includes the length of any HW ULP additions */ + req->len = htonl(len); + /* V_TX_ULP_SUBMODE sets both the mode and submode */ + req->flags = htonl(V_TX_ULP_SUBMODE(cxgbi_skcb_ulp_mode(skb)) | + V_TX_SHOVE((skb_peek(&csk->write_queue) ? 0 : 1))); + req->sndseq = htonl(csk->snd_nxt); + req->param = htonl(V_TX_PORT(l2t->smt_idx)); + + if (!cxgbi_sock_flag(csk, CTPF_TX_DATA_SENT)) { + req->flags |= htonl(V_TX_ACK_PAGES(2) | F_TX_INIT | + V_TX_CPU_IDX(csk->rss_qid)); + /* sendbuffer is in units of 32KB. */ + req->param |= htonl(V_TX_SNDBUF(cxgb3i_snd_win >> 15)); + cxgbi_sock_set_flag(csk, CTPF_TX_DATA_SENT); + } +} + +/** + * push_tx_frames -- start transmit + * @c3cn: the offloaded connection + * @req_completion: request wr_ack or not + * + * Prepends TX_DATA_WR or CPL_CLOSE_CON_REQ headers to buffers waiting in a + * connection's send queue and sends them on to T3. Must be called with the + * connection's lock held. Returns the amount of send buffer space that was + * freed as a result of sending queued data to T3. + */ + +static void arp_failure_skb_discard(struct t3cdev *dev, struct sk_buff *skb) +{ + kfree_skb(skb); +} + +static int push_tx_frames(struct cxgbi_sock *csk, int req_completion) +{ + int total_size = 0; + struct sk_buff *skb; + + if (unlikely(csk->state < CTP_ESTABLISHED || + csk->state == CTP_CLOSE_WAIT_1 || csk->state >= CTP_ABORTING)) { + cxgb3i_log_debug(1 << CXGBI_DBG_PDU_TX, + "csk 0x%p,%u,0x%lx,%u, in closing state.\n", + csk, csk->state, csk->flags, csk->tid); + return 0; + } + + while (csk->wr_cred && (skb = skb_peek(&csk->write_queue)) != NULL) { + int len = skb->len; /* length before skb_push */ + int frags = skb_shinfo(skb)->nr_frags + (len != skb->data_len); + int wrs_needed = skb_wrs[frags]; + + if (wrs_needed > 1 && len + sizeof(struct tx_data_wr) <= wrlen) + wrs_needed = 1; + + WARN_ON(frags >= SKB_WR_LIST_SIZE || wrs_needed < 1); + + if (csk->wr_cred < wrs_needed) { + cxgb3i_log_debug(1 << CXGBI_DBG_PDU_TX, + "csk 0x%p, skb len %u/%u, frag %u, " + "wr %d < %u.\n", + csk, skb->len, skb->data_len, frags, + wrs_needed, csk->wr_cred); + break; + } + + __skb_unlink(skb, &csk->write_queue); + skb->priority = CPL_PRIORITY_DATA; + skb->csum = wrs_needed; /* remember this until the WR_ACK */ + csk->wr_cred -= wrs_needed; + csk->wr_una_cred += wrs_needed; + cxgbi_sock_enqueue_wr(csk, skb); + + cxgb3i_log_debug(1 << CXGBI_DBG_PDU_TX, + "csk 0x%p, enqueue, skb len %u/%u, frag %u, " + "wr %d, left %u, unack %u.\n", + csk, skb->len, skb->data_len, frags, + skb->csum, csk->wr_cred, csk->wr_una_cred); + + if (likely(cxgbi_skcb_test_flag(skb, SKCBF_TX_NEED_HDR))) { + if ((req_completion && + csk->wr_una_cred == wrs_needed) || + csk->wr_una_cred >= csk->wr_max_cred / 2) { + req_completion = 1; + csk->wr_una_cred = 0; + } + len += cxgbi_ulp_extra_len(cxgbi_skcb_ulp_mode(skb)); + make_tx_data_wr(csk, skb, len, req_completion); + csk->snd_nxt += len; + cxgbi_skcb_clear_flag(skb, SKCBF_TX_NEED_HDR); + } + total_size += skb->truesize; + cxgb3i_log_debug(1 << CXGBI_DBG_PDU_TX, + "csk 0x%p, tid 0x%x, send skb 0x%p.\n", + csk, csk->tid, skb); + set_arp_failure_handler(skb, arp_failure_skb_discard); + l2t_send(csk->cdev->lldev, skb, csk->l2t); + } + return total_size; +} + +/* + * Process a CPL_ACT_ESTABLISH message: -> host + * Updates connection state from an active establish CPL message. Runs with + * the connection lock held. + */ + +static inline void free_atid(struct cxgbi_sock *csk) +{ + if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) { + cxgb3_free_atid(csk->cdev->lldev, csk->atid); + cxgbi_sock_clear_flag(csk, CTPF_HAS_ATID); + cxgbi_sock_put(csk); + } +} + +static int do_act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) +{ + struct cxgbi_sock *csk = ctx; + struct cpl_act_establish *req = cplhdr(skb); + unsigned int tid = GET_TID(req); + unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); + u32 rcv_isn = ntohl(req->rcv_isn); /* real RCV_ISN + 1 */ + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "atid 0x%x,tid 0x%x, csk 0x%p,%u,0x%lx, isn %u.\n", + atid, atid, csk, csk->state, csk->flags, rcv_isn); + + cxgbi_sock_get(csk); + cxgbi_sock_set_flag(csk, CTPF_HAS_TID); + csk->tid = tid; + cxgb3_insert_tid(csk->cdev->lldev, &t3_client, csk, tid); + + free_atid(csk); + + csk->rss_qid = G_QNUM(ntohs(skb->csum)); + + spin_lock_bh(&csk->lock); + if (unlikely(csk->state != CTP_ACTIVE_OPEN)) + cxgb3i_log_info("csk 0x%p,%u,0x%lx,%u, got EST.\n", + csk, csk->state, csk->flags, csk->tid); + + if (csk->retry_timer.function) { + del_timer(&csk->retry_timer); + csk->retry_timer.function = NULL; + } + + csk->copied_seq = csk->rcv_wup = csk->rcv_nxt = rcv_isn; + if (cxgb3i_rcv_win > (M_RCV_BUFSIZ << 10)) + csk->rcv_wup -= cxgb3i_rcv_win - (M_RCV_BUFSIZ << 10); + + cxgbi_sock_established(csk, ntohl(req->snd_isn), ntohs(req->tcp_opt)); + + if (unlikely(cxgbi_sock_flag(csk, CTPF_ACTIVE_CLOSE_NEEDED))) + /* upper layer has requested closing */ + send_abort_req(csk); + else { + if (skb_queue_len(&csk->write_queue)) + push_tx_frames(csk, 1); + cxgbi_conn_tx_open(csk); + } + + spin_unlock_bh(&csk->lock); + __kfree_skb(skb); + return 0; +} + +/* + * Process a CPL_ACT_OPEN_RPL message: -> host + * Handle active open failures. + */ +static int act_open_rpl_status_to_errno(int status) +{ + switch (status) { + case CPL_ERR_CONN_RESET: + return -ECONNREFUSED; + case CPL_ERR_ARP_MISS: + return -EHOSTUNREACH; + case CPL_ERR_CONN_TIMEDOUT: + return -ETIMEDOUT; + case CPL_ERR_TCAM_FULL: + return -ENOMEM; + case CPL_ERR_CONN_EXIST: + cxgb3i_log_info("ACTIVE_OPEN_RPL: 4-tuple in use\n"); + return -EADDRINUSE; + default: + return -EIO; + } +} + +static void act_open_retry_timer(unsigned long data) +{ + struct sk_buff *skb; + struct cxgbi_sock *csk = (struct cxgbi_sock *)data; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u.\n", + csk, csk->state, csk->flags, csk->tid); + + cxgbi_sock_get(csk); + spin_lock_bh(&csk->lock); + skb = alloc_cpl(sizeof(struct cpl_act_open_req), 0, GFP_ATOMIC); + if (!skb) + cxgbi_sock_fail_act_open(csk, -ENOMEM); + else { + skb->sk = (struct sock *)csk; + set_arp_failure_handler(skb, act_open_arp_failure); + send_act_open_req(csk, skb, csk->l2t); + } + spin_unlock_bh(&csk->lock); + cxgbi_sock_put(csk); +} + +static int do_act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) +{ + struct cxgbi_sock *csk = ctx; + struct cpl_act_open_rpl *rpl = cplhdr(skb); + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u, status %u.\n", + csk, csk->state, csk->flags, csk->atid, rpl->status); + + if (rpl->status != CPL_ERR_TCAM_FULL && + rpl->status != CPL_ERR_CONN_EXIST && + rpl->status != CPL_ERR_ARP_MISS) + cxgb3_queue_tid_release(tdev, GET_TID(rpl)); + + cxgbi_sock_get(csk); + spin_lock_bh(&csk->lock); + if (rpl->status == CPL_ERR_CONN_EXIST && + csk->retry_timer.function != act_open_retry_timer) { + csk->retry_timer.function = act_open_retry_timer; + mod_timer(&csk->retry_timer, jiffies + HZ / 2); + } else + cxgbi_sock_fail_act_open(csk, + act_open_rpl_status_to_errno(rpl->status)); + + spin_unlock_bh(&csk->lock); + cxgbi_sock_put(csk); + __kfree_skb(skb); + return 0; +} + +/* + * Process PEER_CLOSE CPL messages: -> host + * Handle peer FIN. + */ +static int do_peer_close(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) +{ + struct cxgbi_sock *csk = ctx; + + cxgbi_sock_rcv_peer_close(csk); + __kfree_skb(skb); + return 0; +} + +/* + * Process CLOSE_CONN_RPL CPL message: -> host + * Process a peer ACK to our FIN. + */ +static int do_close_con_rpl(struct t3cdev *cdev, struct sk_buff *skb, + void *ctx) +{ + struct cxgbi_sock *csk = ctx; + struct cpl_close_con_rpl *rpl = cplhdr(skb); + + cxgbi_sock_rcv_close_conn_rpl(csk, ntohl(rpl->snd_nxt)); + __kfree_skb(skb); + return 0; +} + +/* + * Process ABORT_REQ_RSS CPL message: -> host + * Process abort requests. If we are waiting for an ABORT_RPL we ignore this + * request except that we need to reply to it. + */ + +static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason, + int *need_rst) +{ + switch (abort_reason) { + case CPL_ERR_BAD_SYN: /* fall through */ + case CPL_ERR_CONN_RESET: + return csk->state > CTP_ESTABLISHED ? + -EPIPE : -ECONNRESET; + case CPL_ERR_XMIT_TIMEDOUT: + case CPL_ERR_PERSIST_TIMEDOUT: + case CPL_ERR_FINWAIT2_TIMEDOUT: + case CPL_ERR_KEEPALIVE_TIMEDOUT: + return -ETIMEDOUT; + default: + return -EIO; + } +} + +static int do_abort_req(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) +{ + const struct cpl_abort_req_rss *req = cplhdr(skb); + struct cxgbi_sock *csk = ctx; + int rst_status = CPL_ABORT_NO_RST; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u.\n", + csk, csk->state, csk->flags, csk->tid); + + if (req->status == CPL_ERR_RTX_NEG_ADVICE || + req->status == CPL_ERR_PERSIST_NEG_ADVICE) { + goto done; + } + + cxgbi_sock_get(csk); + spin_lock_bh(&csk->lock); + + if (!cxgbi_sock_flag(csk, CTPF_ABORT_REQ_RCVD)) { + cxgbi_sock_set_flag(csk, CTPF_ABORT_REQ_RCVD); + cxgbi_sock_set_state(csk, CTP_ABORTING); + goto out; + } + + cxgbi_sock_clear_flag(csk, CTPF_ABORT_REQ_RCVD); + send_abort_rpl(csk, rst_status); + + if (!cxgbi_sock_flag(csk, CTPF_ABORT_RPL_PENDING)) { + csk->err = abort_status_to_errno(csk, req->status, &rst_status); + cxgbi_sock_closed(csk); + } + +out: + spin_unlock_bh(&csk->lock); + cxgbi_sock_put(csk); +done: + __kfree_skb(skb); + return 0; +} + +/* + * Process ABORT_RPL_RSS CPL message: -> host + * Process abort replies. We only process these messages if we anticipate + * them as the coordination between SW and HW in this area is somewhat lacking + * and sometimes we get ABORT_RPLs after we are done with the connection that + * originated the ABORT_REQ. + */ +static int do_abort_rpl(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) +{ + struct cpl_abort_rpl_rss *rpl = cplhdr(skb); + struct cxgbi_sock *csk = ctx; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "status 0x%x, csk 0x%p, s %u, 0x%lx.\n", + rpl->status, csk, csk ? csk->state : 0, + csk ? csk->flags : 0UL); + /* + * Ignore replies to post-close aborts indicating that the abort was + * requested too late. These connections are terminated when we get + * PEER_CLOSE or CLOSE_CON_RPL and by the time the abort_rpl_rss + * arrives the TID is either no longer used or it has been recycled. + */ + if (rpl->status == CPL_ERR_ABORT_FAILED) + goto rel_skb; + /* + * Sometimes we've already closed the connection, e.g., a post-close + * abort races with ABORT_REQ_RSS, the latter frees the connection + * expecting the ABORT_REQ will fail with CPL_ERR_ABORT_FAILED, + * but FW turns the ABORT_REQ into a regular one and so we get + * ABORT_RPL_RSS with status 0 and no connection. + */ + if (csk) + cxgbi_sock_rcv_abort_rpl(csk); +rel_skb: + __kfree_skb(skb); + return 0; +} + +/* + * Process RX_ISCSI_HDR CPL message: -> host + * Handle received PDUs, the payload could be DDP'ed. If not, the payload + * follow after the bhs. + */ +static int do_iscsi_hdr(struct t3cdev *t3dev, struct sk_buff *skb, void *ctx) +{ + struct cxgbi_sock *csk = ctx; + struct cpl_iscsi_hdr *hdr_cpl = cplhdr(skb); + struct cpl_iscsi_hdr_norss data_cpl; + struct cpl_rx_data_ddp_norss ddp_cpl; + unsigned int hdr_len, data_len, status; + unsigned int len; + int err; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, + "csk 0x%p,%u,0x%lx,%u, skb 0x%p,%u.\n", + csk, csk->state, csk->flags, csk->tid, skb, skb->len); + + spin_lock_bh(&csk->lock); + + if (unlikely(csk->state >= CTP_PASSIVE_CLOSE)) { + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_SOCK, + "csk 0x%p,%u,0x%lx,%u, bad state.\n", + csk, csk->state, csk->flags, csk->tid); + if (csk->state != CTP_ABORTING) + goto abort_conn; + else + goto discard; + } + + cxgbi_skcb_tcp_seq(skb) = ntohl(hdr_cpl->seq); + cxgbi_skcb_flags(skb) = 0; + + skb_reset_transport_header(skb); + __skb_pull(skb, sizeof(struct cpl_iscsi_hdr)); + + len = hdr_len = ntohs(hdr_cpl->len); + /* msg coalesce is off or not enough data received */ + if (skb->len <= hdr_len) { + cxgb3i_log_error("%s: TID %u, ISCSI_HDR, skb len %u < %u.\n", + csk->cdev->ports[csk->port_id]->name, + csk->tid, skb->len, hdr_len); + goto abort_conn; + } + cxgbi_skcb_set_flag(skb, SKCBF_RX_COALESCED); + + err = skb_copy_bits(skb, skb->len - sizeof(ddp_cpl), &ddp_cpl, + sizeof(ddp_cpl)); + if (err < 0) { + cxgb3i_log_error("%s: TID %u, copy cpl_ddp %u-%lu failed %d.\n", + csk->cdev->ports[csk->port_id]->name, + csk->tid, skb->len, sizeof(ddp_cpl), err); + goto abort_conn; + } + + cxgbi_skcb_set_flag(skb, SKCBF_RX_STATUS); + cxgbi_skcb_rx_pdulen(skb) = ntohs(ddp_cpl.len); + cxgbi_skcb_rx_ddigest(skb) = ntohl(ddp_cpl.ulp_crc); + status = ntohl(ddp_cpl.ddp_status); + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE | 1 << CXGBI_DBG_PDU_RX, + "csk 0x%p, skb 0x%p,%u, pdulen %u, status 0x%x.\n", + csk, skb, skb->len, cxgbi_skcb_rx_pdulen(skb), status); + + if (status & (1 << CPL_RX_DDP_STATUS_HCRC_SHIFT)) + cxgbi_skcb_set_flag(skb, SKCBF_RX_HCRC_ERR); + if (status & (1 << CPL_RX_DDP_STATUS_DCRC_SHIFT)) + cxgbi_skcb_set_flag(skb, SKCBF_RX_DCRC_ERR); + if (status & (1 << CPL_RX_DDP_STATUS_PAD_SHIFT)) + cxgbi_skcb_set_flag(skb, SKCBF_RX_PAD_ERR); + + if (skb->len > (hdr_len + sizeof(ddp_cpl))) { + err = skb_copy_bits(skb, hdr_len, &data_cpl, sizeof(data_cpl)); + if (err < 0) { + cxgb3i_log_error("%s: tid %u, cp %lu/%u failed %d.\n", + csk->cdev->ports[csk->port_id]->name, + csk->tid, sizeof(data_cpl), skb->len, err); + goto abort_conn; + } + data_len = ntohs(data_cpl.len); + cxgb3i_log_debug(1 << CXGBI_DBG_DDP | 1 << CXGBI_DBG_PDU_RX, + "skb 0x%p, pdu not ddp'ed %u/%u, status 0x%x.\n", + skb, data_len, cxgbi_skcb_rx_pdulen(skb), status); + len += sizeof(data_cpl) + data_len; + } else if (status & (1 << CPL_RX_DDP_STATUS_DDP_SHIFT)) + cxgbi_skcb_set_flag(skb, SKCBF_RX_DATA_DDPD); + + csk->rcv_nxt = ntohl(ddp_cpl.seq) + cxgbi_skcb_rx_pdulen(skb); + __pskb_trim(skb, len); + __skb_queue_tail(&csk->receive_queue, skb); + cxgbi_conn_pdu_ready(csk); + + spin_unlock_bh(&csk->lock); + return 0; + +abort_conn: + send_abort_req(csk); +discard: + spin_unlock_bh(&csk->lock); + __kfree_skb(skb); + return 0; +} + +/* + * Process TX_DATA_ACK CPL messages: -> host + * Process an acknowledgment of WR completion. Advance snd_una and send the + * next batch of work requests from the write queue. + */ +static int do_wr_ack(struct t3cdev *cdev, struct sk_buff *skb, void *ctx) +{ + struct cxgbi_sock *csk = ctx; + struct cpl_wr_ack *hdr = cplhdr(skb); + + cxgbi_sock_rcv_wr_ack(csk, ntohs(hdr->credits), ntohl(hdr->snd_una), 1); + __kfree_skb(skb); + return 0; +} + +/* + * for each connection, pre-allocate skbs needed for close/abort requests. So + * that we can service the request right away. + */ +static int alloc_cpls(struct cxgbi_sock *csk) +{ + csk->cpl_close = alloc_cpl(sizeof(struct cpl_close_con_req), 0, + GFP_KERNEL); + if (!csk->cpl_close) + return -ENOMEM; + csk->cpl_abort_req = alloc_cpl(sizeof(struct cpl_abort_req), 0, + GFP_KERNEL); + if (!csk->cpl_abort_req) + goto free_cpl_skbs; + + csk->cpl_abort_rpl = alloc_cpl(sizeof(struct cpl_abort_rpl), 0, + GFP_KERNEL); + if (!csk->cpl_abort_rpl) + goto free_cpl_skbs; + + return 0; + +free_cpl_skbs: + cxgbi_sock_free_cpl_skbs(csk); + return -ENOMEM; +} + +/** + * release_offload_resources - release offload resource + * @c3cn: the offloaded iscsi tcp connection. + * Release resources held by an offload connection (TID, L2T entry, etc.) + */ +static void l2t_put(struct cxgbi_sock *csk) +{ + struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; + + if (csk->l2t) { + l2t_release(L2DATA(t3dev), csk->l2t); + csk->l2t = NULL; + cxgbi_sock_put(csk); + } +} + +static void release_offload_resources(struct cxgbi_sock *csk) +{ + struct t3cdev *t3dev = (struct t3cdev *)csk->cdev->lldev; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE, + "csk 0x%p, tid 0x%x, state 0x%x, flag 0x%lx.\n", + csk, csk->tid, csk->state, csk->flags); + + csk->rss_qid = 0; + cxgbi_sock_free_cpl_skbs(csk); + + if (csk->wr_cred != csk->wr_max_cred) { + cxgbi_sock_purge_wr_queue(csk); + cxgbi_sock_reset_wr_list(csk); + } + l2t_put(csk); + if (cxgbi_sock_flag(csk, CTPF_HAS_ATID)) + free_atid(csk); + else if (cxgbi_sock_flag(csk, CTPF_HAS_TID)) { + cxgb3_remove_tid(t3dev, (void *)csk, csk->tid); + cxgbi_sock_clear_flag(csk, CTPF_HAS_TID); + cxgbi_sock_put(csk); + } + csk->dst = NULL; + csk->cdev = NULL; +} + +static int init_act_open(struct cxgbi_sock *csk) +{ + struct dst_entry *dst = csk->dst; + struct cxgbi_device *cdev = csk->cdev; + struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; + struct net_device *ndev = cdev->ports[csk->port_id]; + struct sk_buff *skb = NULL; + + cxgb3i_log_debug(1 << CXGBI_DBG_TOE, + "csk 0x%p, state %u, flag 0x%lx.\n", + csk, csk->state, csk->flags); + + csk->rss_qid = 0; + csk->l2t = t3_l2t_get(t3dev, dst->neighbour, ndev); + if (!csk->l2t) { + cxgb3i_log_error("NO l2t available.\n"); + return -EINVAL; + } + cxgbi_sock_get(csk); + + csk->atid = cxgb3_alloc_atid(t3dev, &t3_client, csk); + if (csk->atid < 0) { + cxgb3i_log_error("NO atid available.\n"); + goto rel_resource; + } + cxgbi_sock_set_flag(csk, CTPF_HAS_ATID); + cxgbi_sock_get(csk); + + skb = alloc_cpl(sizeof(struct cpl_act_open_req), 0, GFP_KERNEL); + if (!skb) + goto rel_resource; + skb->sk = (struct sock *)csk; + set_arp_failure_handler(skb, act_open_arp_failure); + + csk->wr_max_cred = csk->wr_cred = T3C_DATA(t3dev)->max_wrs - 1; + csk->wr_una_cred = 0; + csk->mss_idx = cxgbi_sock_select_mss(csk, dst_mtu(dst)); + cxgbi_sock_reset_wr_list(csk); + csk->err = 0; + + cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN); + send_act_open_req(csk, skb, csk->l2t); + return 0; + +rel_resource: + if (skb) + __kfree_skb(skb); + return -EINVAL; +} + +cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS] = { + [CPL_ACT_ESTABLISH] = do_act_establish, + [CPL_ACT_OPEN_RPL] = do_act_open_rpl, + [CPL_PEER_CLOSE] = do_peer_close, + [CPL_ABORT_REQ_RSS] = do_abort_req, + [CPL_ABORT_RPL_RSS] = do_abort_rpl, + [CPL_CLOSE_CON_RPL] = do_close_con_rpl, + [CPL_TX_DMA_ACK] = do_wr_ack, + [CPL_ISCSI_HDR] = do_iscsi_hdr, +}; + +/** + * cxgb3i_ofld_init - allocate and initialize resources for each adapter found + * @cdev: cxgbi adapter + */ +int cxgb3i_ofld_init(struct cxgbi_device *cdev) +{ + struct t3cdev *t3dev = (struct t3cdev *)cdev->lldev; + struct adap_ports port; + struct ofld_page_info rx_page_info; + unsigned int wr_len; + int rc; + + if (t3dev->ctl(t3dev, GET_WR_LEN, &wr_len) < 0 || + t3dev->ctl(t3dev, GET_PORTS, &port) < 0 || + t3dev->ctl(t3dev, GET_RX_PAGE_INFO, &rx_page_info) < 0) { + cxgb3i_log_warn("t3 0x%p, offload up, ioctl failed.\n", + t3dev); + return -EINVAL; + } + + if (cxgb3i_max_connect > CXGBI_MAX_CONN) + cxgb3i_max_connect = CXGBI_MAX_CONN; + + rc = cxgbi_device_portmap_create(cdev, cxgb3i_sport_base, + cxgb3i_max_connect); + if (rc < 0) + return rc; + + init_wr_tab(wr_len); + cdev->csk_release_offload_resources = release_offload_resources; + cdev->csk_push_tx_frames = push_tx_frames; + cdev->csk_send_abort_req = send_abort_req; + cdev->csk_send_close_req = send_close_req; + cdev->csk_send_rx_credits = send_rx_credits; + cdev->csk_alloc_cpls = alloc_cpls; + cdev->csk_init_act_open = init_act_open; + + cxgb3i_log_info("cdev 0x%p, offload up, added.\n", cdev); + return 0; +} + +/* + * functions to program the pagepod in h/w + */ +static inline void ulp_mem_io_set_hdr(struct sk_buff *skb, unsigned int addr) +{ + struct ulp_mem_io *req = (struct ulp_mem_io *)skb->head; + + memset(req, 0, sizeof(*req)); + + req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS)); + req->cmd_lock_addr = htonl(V_ULP_MEMIO_ADDR(addr >> 5) | + V_ULPTX_CMD(ULP_MEM_WRITE)); + req->len = htonl(V_ULP_MEMIO_DATA_LEN(PPOD_SIZE >> 5) | + V_ULPTX_NFLITS((PPOD_SIZE >> 3) + 1)); +} + +static int ddp_set_map(struct cxgbi_sock *csk, struct cxgbi_pagepod_hdr *hdr, + unsigned int idx, unsigned int npods, + struct cxgbi_gather_list *gl) +{ + struct cxgbi_device *cdev = csk->cdev; + struct cxgbi_ddp_info *ddp = cdev->ddp; + unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; + int i; + + cxgb3i_log_debug(1 << CXGBI_DBG_DDP, + "csk 0x%p, idx %u, npods %u, gl 0x%p.\n", + csk, idx, npods, gl); + + for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { + struct sk_buff *skb = ddp->gl_skb[idx]; + + /* hold on to the skb until we clear the ddp mapping */ + skb_get(skb); + + ulp_mem_io_set_hdr(skb, pm_addr); + cxgbi_ddp_ppod_set((struct cxgbi_pagepod *)(skb->head + + sizeof(struct ulp_mem_io)), + hdr, gl, i * PPOD_PAGES_MAX); + skb->priority = CPL_PRIORITY_CONTROL; + cxgb3_ofld_send(cdev->lldev, skb); + } + return 0; +} + +static void ddp_clear_map(struct cxgbi_hba *chba, unsigned int tag, + unsigned int idx, unsigned int npods) +{ + struct cxgbi_device *cdev = chba->cdev; + struct cxgbi_ddp_info *ddp = cdev->ddp; + unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ddp->llimit; + int i; + + cxgb3i_log_debug(1 << CXGBI_DBG_DDP, + "cdev 0x%p, idx %u, npods %u, tag 0x%x.\n", + cdev, idx, npods, tag); + + for (i = 0; i < npods; i++, idx++, pm_addr += PPOD_SIZE) { + struct sk_buff *skb = ddp->gl_skb[idx]; + + if (!skb) { + cxgb3i_log_error("tag 0x%x, 0x%x, %d/%u, skb NULL.\n", + tag, idx, i, npods); + continue; + } + ddp->gl_skb[idx] = NULL; + memset(skb->head + sizeof(struct ulp_mem_io), 0, PPOD_SIZE); + ulp_mem_io_set_hdr(skb, pm_addr); + skb->priority = CPL_PRIORITY_CONTROL; + cxgb3_ofld_send(cdev->lldev, skb); + } +} + +static void ddp_free_gl_skb(struct cxgbi_ddp_info *ddp, int idx, int cnt) +{ + int i; + + cxgb3i_log_debug(1 << CXGBI_DBG_DDP, + "ddp 0x%p, idx %d, cnt %d.\n", + ddp, idx, cnt); + + for (i = 0; i < cnt; i++, idx++) + if (ddp->gl_skb[idx]) { + kfree_skb(ddp->gl_skb[idx]); + ddp->gl_skb[idx] = NULL; + } +} + +static int ddp_alloc_gl_skb(struct cxgbi_ddp_info *ddp, int idx, + int cnt, gfp_t gfp) +{ + int i; + + cxgb3i_log_debug(1 << CXGBI_DBG_DDP, + "ddp 0x%p, idx %d, cnt %d.\n", + ddp, idx, cnt); + + for (i = 0; i < cnt; i++) { + struct sk_buff *skb = alloc_cpl(sizeof(struct ulp_mem_io) + + PPOD_SIZE, 0, gfp); + if (skb) { + ddp->gl_skb[idx + i] = skb; + } else { + ddp_free_gl_skb(ddp, idx, i); + return -ENOMEM; + } + } + return 0; +} + +static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, + unsigned int tid, int pg_idx, bool reply) +{ + struct sk_buff *skb = alloc_cpl(sizeof(struct cpl_set_tcb_field), 0, + GFP_KERNEL); + struct cpl_set_tcb_field *req; + u64 val = pg_idx < DDP_PGIDX_MAX ? pg_idx : 0; + + cxgb3i_log_debug(1 << CXGBI_DBG_DDP, + "csk 0x%p, tid %u, pg_idx %d.\n", + csk, tid, pg_idx); + + if (!skb) + return -ENOMEM; + + /* set up ulp submode and page size */ + req = (struct cpl_set_tcb_field *)skb->head; + req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); + OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); + req->reply = V_NO_REPLY(reply ? 0 : 1); + req->cpu_idx = 0; + req->word = htons(31); + req->mask = cpu_to_be64(0xF0000000); + req->val = cpu_to_be64(val << 28); + skb->priority = CPL_PRIORITY_CONTROL; + + cxgb3_ofld_send(csk->cdev->lldev, skb); + return 0; +} + +/** + * cxgb3i_setup_conn_digest - setup conn. digest setting + * @csk: cxgb tcp socket + * @tid: connection id + * @hcrc: header digest enabled + * @dcrc: data digest enabled + * @reply: request reply from h/w + * set up the iscsi digest settings for a connection identified by tid + */ +static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, + int hcrc, int dcrc, int reply) +{ + struct sk_buff *skb = alloc_cpl(sizeof(struct cpl_set_tcb_field), 0, + GFP_KERNEL); + struct cpl_set_tcb_field *req; + u64 val = (hcrc ? 1 : 0) | (dcrc ? 2 : 0); + + cxgb3i_log_debug(1 << CXGBI_DBG_DDP, + "csk 0x%p, tid %u, crc %d,%d.\n", + csk, tid, hcrc, dcrc); + if (!skb) + return -ENOMEM; + + /* set up ulp submode and page size */ + req = (struct cpl_set_tcb_field *)skb->head; + req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); + OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); + req->reply = V_NO_REPLY(reply ? 0 : 1); + req->cpu_idx = 0; + req->word = htons(31); + req->mask = cpu_to_be64(0x0F000000); + req->val = cpu_to_be64(val << 24); + skb->priority = CPL_PRIORITY_CONTROL; + + cxgb3_ofld_send(csk->cdev->lldev, skb); + return 0; +} + +/** + * t3_ddp_cleanup - release the cxgb3 adapter's ddp resource + * @cdev: cxgb3i adapter + * release all the resource held by the ddp pagepod manager for a given + * adapter if needed + */ + +static void t3_ddp_cleanup(struct cxgbi_device *cdev) +{ + struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; + + if (cxgbi_ddp_cleanup(cdev)) { + cxgb3i_log_info("t3dev 0x%p, ulp_iscsi no more user.\n", + tdev); + tdev->ulp_iscsi = NULL; + } +} + +/** + * ddp_init - initialize the cxgb3 adapter's ddp resource + * @cdev: cxgb3i adapter + * initialize the ddp pagepod manager for a given adapter + */ +static int cxgb3i_ddp_init(struct cxgbi_device *cdev) +{ + struct t3cdev *tdev = (struct t3cdev *)cdev->lldev; + struct cxgbi_ddp_info *ddp = tdev->ulp_iscsi; + struct ulp_iscsi_info uinfo; + unsigned int pgsz_factor[4]; + int err; + + if (ddp) { + kref_get(&ddp->refcnt); + cxgb3i_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n", + tdev, tdev->ulp_iscsi); + cdev->ddp = ddp; + return -EALREADY; + } + + err = tdev->ctl(tdev, ULP_ISCSI_GET_PARAMS, &uinfo); + if (err < 0) { + cxgb3i_log_error("%s, failed to get iscsi param err=%d.\n", + tdev->name, err); + return err; + } + + err = cxgbi_ddp_init(cdev, uinfo.llimit, uinfo.ulimit, + uinfo.max_txsz, uinfo.max_rxsz); + if (err < 0) + return err; + + ddp = cdev->ddp; + + uinfo.tagmask = ddp->idx_mask << PPOD_IDX_SHIFT; + cxgbi_ddp_page_size_factor(pgsz_factor); + uinfo.ulimit = uinfo.llimit + (ddp->nppods << PPOD_SIZE_SHIFT); + + err = tdev->ctl(tdev, ULP_ISCSI_SET_PARAMS, &uinfo); + if (err < 0) { + cxgb3i_log_warn("%s unable to set iscsi param err=%d, " + "ddp disabled.\n", tdev->name, err); + cxgbi_ddp_cleanup(cdev); + return err; + } + tdev->ulp_iscsi = ddp; + + cdev->csk_ddp_free_gl_skb = ddp_free_gl_skb; + cdev->csk_ddp_alloc_gl_skb = ddp_alloc_gl_skb; + cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; + cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; + cdev->csk_ddp_set = ddp_set_map; + cdev->csk_ddp_clear = ddp_clear_map; + + cxgb3i_log_info("tdev 0x%p, nppods %u, bits %u, mask 0x%x,0x%x " + "pkt %u/%u, %u/%u.\n", + tdev, ddp->nppods, ddp->idx_bits, ddp->idx_mask, + ddp->rsvd_tag_mask, ddp->max_txsz, uinfo.max_txsz, + ddp->max_rxsz, uinfo.max_rxsz); + return 0; +} + +static void cxgb3i_dev_close(struct t3cdev *t3dev) +{ + struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); + + if (!cdev || cdev->flags & CXGBI_FLAG_ADAPTER_RESET) { + cxgb3i_log_info("t3 0x%p close, f 0x%x.\n", + cdev, cdev ? cdev->flags : 0); + return; + } + + cxgbi_device_unregister(cdev); +} + +/** + * cxgb3i_dev_open - init a t3 adapter structure and any h/w settings + * @t3dev: t3cdev adapter + */ +static void cxgb3i_dev_open(struct t3cdev *t3dev) +{ + static int vers_printed; + + struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); + struct adapter *adapter = tdev2adap(t3dev); + int i, err; + + if (!vers_printed) { + printk(KERN_INFO "%s", version); + vers_printed = 1; + } + + if (cdev) { + cxgb3i_log_info("t3 0x%p, updating.\n", cdev); + return; + } + + cdev = cxgbi_device_register(0, adapter->params.nports); + if (!cdev) { + cxgb3i_log_warn("t3 device 0x%p register failed.\n", t3dev); + return; + } + + cdev->flags = CXGBI_FLAG_DEV_T3; + cdev->lldev = t3dev; + cdev->pdev = adapter->pdev; + cdev->ports = adapter->port; + cdev->nports = adapter->params.nports; + cdev->mtus = adapter->params.mtus; + cdev->nmtus = NMTUS; + cdev->snd_win = cxgb3i_snd_win; + cdev->rcv_win = cxgb3i_rcv_win; + cdev->rx_credit_thres = cxgb3i_rx_credit_thres; + cdev->skb_tx_rsvd = CXGB3I_TX_HEADER_LEN; + cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr_norss); + cdev->itp = &cxgb3i_iscsi_transport; + cdev->dev_ddp_cleanup = t3_ddp_cleanup; + + err = cxgbi_iscsi_init(cdev); + if (err) { + cxgb3i_log_info("t3 0x%p iscsi init failed\n", cdev); + goto err_out; + } + + err = cxgb3i_ddp_init(cdev); + if (err) { + cxgb3i_log_info("t3 0x%p ddp init failed\n", cdev); + goto err_out; + } + + err = cxgb3i_ofld_init(cdev); + if (err) { + cxgb3i_log_info("t3 0x%p offload init failed\n", cdev); + goto err_out; + } + + err = cxgbi_hbas_add(cdev, CXGB3I_MAX_LUN, CXGBI_MAX_CONN, + &cxgb3i_host_template); + if (err) + goto err_out; + + for (i = 0; i < cdev->nports; i++) + cdev->hbas[i]->ipv4addr = + cxgb3i_get_private_ipv4addr(cdev->ports[i]); + + cxgb3i_log_info("cdev 0x%p, f 0x%x, t3dev 0x%p open, err %d.\n", + cdev, cdev ? cdev->flags : 0, t3dev, err); + return; + +err_out: + cxgbi_device_unregister(cdev); +} + +static void cxgb3i_dev_event_handler(struct t3cdev *t3dev, u32 event, u32 port) +{ + struct cxgbi_device *cdev = cxgbi_device_find_by_lldev(t3dev); + + cxgb3i_log_debug(CXGBI_DBG_TOE, + "t3dev 0x%p, cdev 0x%p, event 0x%x, port 0x%x.\n", + t3dev, cdev, event, port); + if (!cdev) + return; + + switch (event) { + case OFFLOAD_STATUS_DOWN: + cdev->flags |= CXGBI_FLAG_ADAPTER_RESET; + break; + case OFFLOAD_STATUS_UP: + cdev->flags &= ~CXGBI_FLAG_ADAPTER_RESET; + break; + } +} + +/** + * cxgb3i_init_module - module init entry point + * + * initialize any driver wide global data structures and register itself + * with the cxgb3 module + */ +static int __init cxgb3i_init_module(void) +{ + cxgbi_fill_scsi_host_template(&cxgb3i_host_template); + cxgbi_fill_iscsi_transport(&cxgb3i_iscsi_transport); + cxgb3_register_client(&t3_client); + + return 0; +} + +/** + * cxgb3i_exit_module - module cleanup/exit entry point + * + * go through the driver hba list and for each hba, release any resource held. + * and unregisters iscsi transport and the cxgb3 module + */ +static void __exit cxgb3i_exit_module(void) +{ + cxgb3_unregister_client(&t3_client); + cxgbi_device_unregister_all(CXGBI_FLAG_DEV_T3); +} + +module_init(cxgb3i_init_module); +module_exit(cxgb3i_exit_module); diff --git a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.h b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.h new file mode 100644 index 0000000..b717535 --- /dev/null +++ b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.h @@ -0,0 +1,53 @@ +/* + * cxgb3i.h: Chelsio S3xx iSCSI driver. + * + * Copyright (c) 2008 Chelsio Communications, 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. + * + * Written by: Karen Xie (kxie@xxxxxxxxxxx) + */ + +#ifndef __CXGB3I_H__ +#define __CXGB3I_H__ + +#include "../libcxgbi.h" + +#define CXGB3I_SCSI_HOST_QDEPTH 1024 +#define CXGB3I_MAX_LUN 512 +#define ISCSI_PDU_NONPAYLOAD_MAX \ + (sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE + 2*ISCSI_DIGEST_SIZE) + +/*for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */ +#define CXGB3I_TX_HEADER_LEN \ + (sizeof(struct tx_data_wr) + sizeof(struct sge_opaque_hdr)) + +extern cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS]; + +#define cxgb3i_get_private_ipv4addr(ndev) \ + (((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr) +#define cxgb3i_set_private_ipv4addr(ndev, addr) \ + (((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr) = addr + +struct cpl_iscsi_hdr_norss { + union opcode_tid ot; + u16 pdu_len_ddp; + u16 len; + u32 seq; + u16 urg; + u8 rsvd; + u8 status; +}; + +struct cpl_rx_data_ddp_norss { + union opcode_tid ot; + u16 urg; + u16 len; + u32 seq; + u32 nxt_seq; + u32 ulp_crc; + u32 ddp_status; +}; +#endif diff --git a/drivers/scsi/cxgbi/cxgb4i/Kconfig b/drivers/scsi/cxgbi/cxgb4i/Kconfig new file mode 100644 index 0000000..96c887a --- /dev/null +++ b/drivers/scsi/cxgbi/cxgb4i/Kconfig @@ -0,0 +1,7 @@ +config SCSI_CXGB4_ISCSI + tristate "Chelsio T4 iSCSI support" + depends on CHELSIO_T4_DEPENDS + select CHELSIO_T4 + select SCSI_ISCSI_ATTRS + ---help--- + This driver supports iSCSI offload for the Chelsio T4 devices. -- 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
