From patchwork Sat Jul 16 17:19:17 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Varun Prakash X-Patchwork-Id: 9233339 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6804560574 for ; Sat, 16 Jul 2016 17:22:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 57C0321C9A for ; Sat, 16 Jul 2016 17:22:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4C33F22376; Sat, 16 Jul 2016 17:22:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E190521C9A for ; Sat, 16 Jul 2016 17:22:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751884AbcGPRWR (ORCPT ); Sat, 16 Jul 2016 13:22:17 -0400 Received: from [12.32.117.8] ([12.32.117.8]:27955 "EHLO stargate3.asicdesigners.com" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751744AbcGPRWO (ORCPT ); Sat, 16 Jul 2016 13:22:14 -0400 Received: from fcoe-test11.asicdesigners.com (fcoe-test11.blr.asicdesigners.com [10.193.185.180]) by stargate3.asicdesigners.com (8.13.8/8.13.8) with ESMTP id u6GHJuj2009527; Sat, 16 Jul 2016 10:21:07 -0700 From: Varun Prakash To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, nab@linux-iscsi.org, gerlitz.or@gmail.com, swise@opengridcomputing.com, james.bottomley@hansenpartnership.com, indranil@chelsio.com, hariprasad@chelsio.com, varun@chelsio.com Subject: [net-next v2 3/6] cxgb4i,libcxgbi: add iSCSI DDP support Date: Sat, 16 Jul 2016 22:49:17 +0530 Message-Id: X-Mailer: git-send-email 2.0.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add iSCSI DDP support in cxgb4i driver using common iSCSI DDP Page Pod Manager. Signed-off-by: Varun Prakash --- drivers/scsi/cxgbi/Makefile | 2 + drivers/scsi/cxgbi/cxgb3i/Kbuild | 1 + drivers/scsi/cxgbi/cxgb3i/Kconfig | 1 + drivers/scsi/cxgbi/cxgb4i/Kbuild | 1 + drivers/scsi/cxgbi/cxgb4i/Kconfig | 1 + drivers/scsi/cxgbi/cxgb4i/cxgb4i.c | 145 ++++++++++++++++ drivers/scsi/cxgbi/libcxgbi.c | 331 +++++++++++++++++++++++++++++++++++++ drivers/scsi/cxgbi/libcxgbi.h | 27 ++- 8 files changed, 507 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/cxgbi/Makefile b/drivers/scsi/cxgbi/Makefile index 86007e3..a73781a 100644 --- a/drivers/scsi/cxgbi/Makefile +++ b/drivers/scsi/cxgbi/Makefile @@ -1,2 +1,4 @@ +ccflags-y += -Idrivers/net/ethernet/chelsio/libcxgb + 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 index 961a12f..663c52e 100644 --- a/drivers/scsi/cxgbi/cxgb3i/Kbuild +++ b/drivers/scsi/cxgbi/cxgb3i/Kbuild @@ -1,3 +1,4 @@ ccflags-y += -I$(srctree)/drivers/net/ethernet/chelsio/cxgb3 +ccflags-y += -I$(srctree)/drivers/net/ethernet/chelsio/libcxgb obj-$(CONFIG_SCSI_CXGB3_ISCSI) += cxgb3i.o diff --git a/drivers/scsi/cxgbi/cxgb3i/Kconfig b/drivers/scsi/cxgbi/cxgb3i/Kconfig index e460398..f68c871 100644 --- a/drivers/scsi/cxgbi/cxgb3i/Kconfig +++ b/drivers/scsi/cxgbi/cxgb3i/Kconfig @@ -5,6 +5,7 @@ config SCSI_CXGB3_ISCSI select ETHERNET select NET_VENDOR_CHELSIO select CHELSIO_T3 + select CHELSIO_LIB select SCSI_ISCSI_ATTRS ---help--- This driver supports iSCSI offload for the Chelsio T3 devices. diff --git a/drivers/scsi/cxgbi/cxgb4i/Kbuild b/drivers/scsi/cxgbi/cxgb4i/Kbuild index 3745864..38e03c2 100644 --- a/drivers/scsi/cxgbi/cxgb4i/Kbuild +++ b/drivers/scsi/cxgbi/cxgb4i/Kbuild @@ -1,3 +1,4 @@ ccflags-y += -I$(srctree)/drivers/net/ethernet/chelsio/cxgb4 +ccflags-y += -I$(srctree)/drivers/net/ethernet/chelsio/libcxgb obj-$(CONFIG_SCSI_CXGB4_ISCSI) += cxgb4i.o diff --git a/drivers/scsi/cxgbi/cxgb4i/Kconfig b/drivers/scsi/cxgbi/cxgb4i/Kconfig index 8c4e423..594f593 100644 --- a/drivers/scsi/cxgbi/cxgb4i/Kconfig +++ b/drivers/scsi/cxgbi/cxgb4i/Kconfig @@ -5,6 +5,7 @@ config SCSI_CXGB4_ISCSI select ETHERNET select NET_VENDOR_CHELSIO select CHELSIO_T4 + select CHELSIO_LIB select SCSI_ISCSI_ATTRS ---help--- This driver supports iSCSI offload for the Chelsio T4 devices. diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c index 2911214..521f9e4 100644 --- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c +++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c @@ -1543,6 +1543,115 @@ int cxgb4i_ofld_init(struct cxgbi_device *cdev) return 0; } +static inline void +ulp_mem_io_set_hdr(struct cxgbi_device *cdev, + struct ulp_mem_io *req, + unsigned int wr_len, unsigned int dlen, + unsigned int pm_addr, + int tid) +{ + struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); + struct ulptx_idata *idata = (struct ulptx_idata *)(req + 1); + + INIT_ULPTX_WR(req, wr_len, 0, tid); + req->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | + FW_WR_ATOMIC_V(0)); + req->cmd = htonl(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | + ULP_MEMIO_ORDER_V(is_t4(lldi->adapter_type)) | + T5_ULP_MEMIO_IMM_V(!is_t4(lldi->adapter_type))); + req->dlen = htonl(ULP_MEMIO_DATA_LEN_V(dlen >> 5)); + req->lock_addr = htonl(ULP_MEMIO_ADDR_V(pm_addr >> 5)); + req->len16 = htonl(DIV_ROUND_UP(wr_len - sizeof(req->wr), 16)); + + idata->cmd_more = htonl(ULPTX_CMD_V(ULP_TX_SC_IMM)); + idata->len = htonl(dlen); +} + +static struct sk_buff * +ddp_ppod_init_idata(struct cxgbi_device *cdev, + struct cxgbi_ppm *ppm, + unsigned int idx, unsigned int npods, + unsigned int tid) +{ + unsigned int pm_addr = (idx << PPOD_SIZE_SHIFT) + ppm->llimit; + unsigned int dlen = npods << PPOD_SIZE_SHIFT; + unsigned int wr_len = roundup(sizeof(struct ulp_mem_io) + + sizeof(struct ulptx_idata) + dlen, 16); + struct sk_buff *skb = alloc_wr(wr_len, 0, GFP_ATOMIC); + + if (!skb) { + pr_err("%s: %s idx %u, npods %u, OOM.\n", + __func__, ppm->ndev->name, idx, npods); + return NULL; + } + + ulp_mem_io_set_hdr(cdev, (struct ulp_mem_io *)skb->head, wr_len, dlen, + pm_addr, tid); + + return skb; +} + +static int ddp_ppod_write_idata(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, + struct cxgbi_task_tag_info *ttinfo, + unsigned int idx, unsigned int npods, + struct scatterlist **sg_pp, + unsigned int *sg_off) +{ + struct cxgbi_device *cdev = csk->cdev; + struct sk_buff *skb = ddp_ppod_init_idata(cdev, ppm, idx, npods, + csk->tid); + struct ulp_mem_io *req; + struct ulptx_idata *idata; + struct cxgbi_pagepod *ppod; + int i; + + if (!skb) + return -ENOMEM; + + req = (struct ulp_mem_io *)skb->head; + idata = (struct ulptx_idata *)(req + 1); + ppod = (struct cxgbi_pagepod *)(idata + 1); + + for (i = 0; i < npods; i++, ppod++) + cxgbi_ddp_set_one_ppod(ppod, ttinfo, sg_pp, sg_off); + + cxgbi_skcb_set_flag(skb, SKCBF_TX_MEM_WRITE); + cxgbi_skcb_set_flag(skb, SKCBF_TX_FLAG_COMPL); + set_wr_txq(skb, CPL_PRIORITY_DATA, csk->port_id); + + spin_lock_bh(&csk->lock); + cxgbi_sock_skb_entail(csk, skb); + spin_unlock_bh(&csk->lock); + + return 0; +} + +static int ddp_set_map(struct cxgbi_ppm *ppm, struct cxgbi_sock *csk, + struct cxgbi_task_tag_info *ttinfo) +{ + unsigned int pidx = ttinfo->idx; + unsigned int npods = ttinfo->npods; + unsigned int i, cnt; + int err = 0; + struct scatterlist *sg = ttinfo->sgl; + unsigned int offset = 0; + + ttinfo->cid = csk->port_id; + + for (i = 0; i < npods; i += cnt, pidx += cnt) { + cnt = npods - i; + + if (cnt > ULPMEM_IDATA_MAX_NPPODS) + cnt = ULPMEM_IDATA_MAX_NPPODS; + err = ddp_ppod_write_idata(ppm, csk, ttinfo, pidx, cnt, + &sg, &offset); + if (err < 0) + break; + } + + return err; +} + static int ddp_setup_conn_pgidx(struct cxgbi_sock *csk, unsigned int tid, int pg_idx, bool reply) { @@ -1606,10 +1715,46 @@ static int ddp_setup_conn_digest(struct cxgbi_sock *csk, unsigned int tid, return 0; } +static struct cxgbi_ppm *cdev2ppm(struct cxgbi_device *cdev) +{ + return (struct cxgbi_ppm *)(*((struct cxgb4_lld_info *) + (cxgbi_cdev_priv(cdev)))->iscsi_ppm); +} + static int cxgb4i_ddp_init(struct cxgbi_device *cdev) { + struct cxgb4_lld_info *lldi = cxgbi_cdev_priv(cdev); + struct net_device *ndev = cdev->ports[0]; + struct cxgbi_tag_format tformat; + unsigned int ppmax; + int i; + + if (!lldi->vr->iscsi.size) { + pr_warn("%s, iscsi NOT enabled, check config!\n", ndev->name); + return -EACCES; + } + + cdev->flags |= CXGBI_FLAG_USE_PPOD_OFLDQ; + ppmax = lldi->vr->iscsi.size >> PPOD_SIZE_SHIFT; + + memset(&tformat, 0, sizeof(struct cxgbi_tag_format)); + for (i = 0; i < 4; i++) + tformat.pgsz_order[i] = (lldi->iscsi_pgsz_order >> (i << 3)) + & 0xF; + cxgbi_tagmask_check(lldi->iscsi_tagmask, &tformat); + + cxgbi_ddp_ppm_setup(lldi->iscsi_ppm, cdev, &tformat, ppmax, + lldi->iscsi_llimit, lldi->vr->iscsi.start, 2); + cdev->csk_ddp_setup_digest = ddp_setup_conn_digest; cdev->csk_ddp_setup_pgidx = ddp_setup_conn_pgidx; + cdev->csk_ddp_set_map = ddp_set_map; + cdev->tx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, + lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); + cdev->rx_max_size = min_t(unsigned int, ULP2_MAX_PDU_PAYLOAD, + lldi->iscsi_iolen - ISCSI_PDU_NONPAYLOAD_LEN); + cdev->cdev2ppm = cdev2ppm; + return 0; } diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c index f389d34..9d425a7 100644 --- a/drivers/scsi/cxgbi/libcxgbi.c +++ b/drivers/scsi/cxgbi/libcxgbi.c @@ -64,6 +64,14 @@ static DEFINE_MUTEX(cdev_mutex); static LIST_HEAD(cdev_rcu_list); static DEFINE_SPINLOCK(cdev_rcu_lock); +static inline void cxgbi_decode_sw_tag(u32 sw_tag, int *idx, int *age) +{ + if (age) + *age = sw_tag & 0x7FFF; + if (idx) + *idx = (sw_tag >> 16) & 0x7FFF; +} + int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base, unsigned int max_conn) { @@ -1176,23 +1184,315 @@ out_err: goto done; } +static inline void +scmd_get_params(struct scsi_cmnd *sc, struct scatterlist **sgl, + unsigned int *sgcnt, unsigned int *dlen, + unsigned int prot) +{ + struct scsi_data_buffer *sdb = prot ? scsi_prot(sc) : scsi_out(sc); + + *sgl = sdb->table.sgl; + *sgcnt = sdb->table.nents; + *dlen = sdb->length; + /* Caution: for protection sdb, sdb->length is invalid */ +} + +void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *ppod, + struct cxgbi_task_tag_info *ttinfo, + struct scatterlist **sg_pp, unsigned int *sg_off) +{ + struct scatterlist *sg = sg_pp ? *sg_pp : NULL; + unsigned int offset = sg_off ? *sg_off : 0; + dma_addr_t addr = 0UL; + unsigned int len = 0; + int i; + + memcpy(ppod, &ttinfo->hdr, sizeof(struct cxgbi_pagepod_hdr)); + + if (sg) { + addr = sg_dma_address(sg); + len = sg_dma_len(sg); + } + + for (i = 0; i < PPOD_PAGES_MAX; i++) { + if (sg) { + ppod->addr[i] = cpu_to_be64(addr + offset); + offset += PAGE_SIZE; + if (offset == (len + sg->offset)) { + offset = 0; + sg = sg_next(sg); + if (sg) { + addr = sg_dma_address(sg); + len = sg_dma_len(sg); + } + } + } else { + ppod->addr[i] = 0ULL; + } + } + + /* + * the fifth address needs to be repeated in the next ppod, so do + * not move sg + */ + if (sg_pp) { + *sg_pp = sg; + *sg_off = offset; + } + + if (offset == len) { + offset = 0; + sg = sg_next(sg); + if (sg) { + addr = sg_dma_address(sg); + len = sg_dma_len(sg); + } + } + ppod->addr[i] = sg ? cpu_to_be64(addr + offset) : 0ULL; +} +EXPORT_SYMBOL_GPL(cxgbi_ddp_set_one_ppod); + /* * APIs interacting with open-iscsi libraries */ static unsigned char padding[4]; +void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *cdev, + struct cxgbi_tag_format *tformat, unsigned int ppmax, + unsigned int llimit, unsigned int start, + unsigned int rsvd_factor) +{ + int err = cxgbi_ppm_init(ppm_pp, cdev->ports[0], cdev->pdev, + cdev->lldev, tformat, ppmax, llimit, start, + rsvd_factor); + + if (err >= 0) { + struct cxgbi_ppm *ppm = (struct cxgbi_ppm *)(*ppm_pp); + + if (ppm->ppmax < 1024 || + ppm->tformat.pgsz_idx_dflt >= DDP_PGIDX_MAX) + cdev->flags |= CXGBI_FLAG_DDP_OFF; + err = 0; + } else { + cdev->flags |= CXGBI_FLAG_DDP_OFF; + } +} +EXPORT_SYMBOL_GPL(cxgbi_ddp_ppm_setup); + +static int cxgbi_ddp_sgl_check(struct scatterlist *sgl, int nents) +{ + int i; + int last_sgidx = nents - 1; + struct scatterlist *sg = sgl; + + for (i = 0; i < nents; i++, sg = sg_next(sg)) { + unsigned int len = sg->length + sg->offset; + + if ((sg->offset & 0x3) || (i && sg->offset) || + ((i != last_sgidx) && len != PAGE_SIZE)) { + log_debug(1 << CXGBI_DBG_DDP, + "sg %u/%u, %u,%u, not aligned.\n", + i, nents, sg->offset, sg->length); + goto err_out; + } + } + return 0; +err_out: + return -EINVAL; +} + +static int cxgbi_ddp_reserve(struct cxgbi_conn *cconn, + struct cxgbi_task_data *tdata, u32 sw_tag, + unsigned int xferlen) +{ + struct cxgbi_sock *csk = cconn->cep->csk; + struct cxgbi_device *cdev = csk->cdev; + struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); + struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; + struct scatterlist *sgl = ttinfo->sgl; + unsigned int sgcnt = ttinfo->nents; + unsigned int sg_offset = sgl->offset; + int err; + + if (cdev->flags & CXGBI_FLAG_DDP_OFF) { + log_debug(1 << CXGBI_DBG_DDP, + "cdev 0x%p DDP off.\n", cdev); + return -EINVAL; + } + + if (!ppm || xferlen < DDP_THRESHOLD || !sgcnt || + ppm->tformat.pgsz_idx_dflt >= DDP_PGIDX_MAX) { + log_debug(1 << CXGBI_DBG_DDP, + "ppm 0x%p, pgidx %u, xfer %u, sgcnt %u, NO ddp.\n", + ppm, ppm ? ppm->tformat.pgsz_idx_dflt : DDP_PGIDX_MAX, + xferlen, ttinfo->nents); + return -EINVAL; + } + + /* make sure the buffer is suitable for ddp */ + if (cxgbi_ddp_sgl_check(sgl, sgcnt) < 0) + return -EINVAL; + + ttinfo->nr_pages = (xferlen + sgl->offset + (1 << PAGE_SHIFT) - 1) >> + PAGE_SHIFT; + + /* + * the ddp tag will be used for the itt in the outgoing pdu, + * the itt genrated by libiscsi is saved in the ppm and can be + * retrieved via the ddp tag + */ + err = cxgbi_ppm_ppods_reserve(ppm, ttinfo->nr_pages, 0, &ttinfo->idx, + &ttinfo->tag, (unsigned long)sw_tag); + if (err < 0) { + cconn->ddp_full++; + return err; + } + ttinfo->npods = err; + + /* setup dma from scsi command sgl */ + sgl->offset = 0; + err = dma_map_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE); + sgl->offset = sg_offset; + if (err == 0) { + pr_info("%s: 0x%x, xfer %u, sgl %u dma mapping err.\n", + __func__, sw_tag, xferlen, sgcnt); + goto rel_ppods; + } + if (err != ttinfo->nr_pages) { + log_debug(1 << CXGBI_DBG_DDP, + "%s: sw tag 0x%x, xfer %u, sgl %u, dma count %d.\n", + __func__, sw_tag, xferlen, sgcnt, err); + } + + ttinfo->flags |= CXGBI_PPOD_INFO_FLAG_MAPPED; + ttinfo->cid = csk->port_id; + + cxgbi_ppm_make_ppod_hdr(ppm, ttinfo->tag, csk->tid, sgl->offset, + xferlen, &ttinfo->hdr); + + if (cdev->flags & CXGBI_FLAG_USE_PPOD_OFLDQ) { + /* write ppod from xmit_pdu (of iscsi_scsi_command pdu) */ + ttinfo->flags |= CXGBI_PPOD_INFO_FLAG_VALID; + } else { + /* write ppod from control queue now */ + err = cdev->csk_ddp_set_map(ppm, csk, ttinfo); + if (err < 0) + goto rel_ppods; + } + + return 0; + +rel_ppods: + cxgbi_ppm_ppod_release(ppm, ttinfo->idx); + + if (ttinfo->flags & CXGBI_PPOD_INFO_FLAG_MAPPED) { + ttinfo->flags &= ~CXGBI_PPOD_INFO_FLAG_MAPPED; + dma_unmap_sg(&ppm->pdev->dev, sgl, sgcnt, DMA_FROM_DEVICE); + } + return -EINVAL; +} + static void task_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 cxgbi_conn *cconn = tcp_conn->dd_data; + struct cxgbi_device *cdev = cconn->chba->cdev; + struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); + u32 tag = ntohl((__force u32)hdr_itt); + + log_debug(1 << CXGBI_DBG_DDP, + "cdev 0x%p, task 0x%p, release tag 0x%x.\n", + cdev, task, tag); + if (sc && + (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) && + cxgbi_ppm_is_ddp_tag(ppm, tag)) { + struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); + struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; + + if (!(cdev->flags & CXGBI_FLAG_USE_PPOD_OFLDQ)) + cdev->csk_ddp_clear_map(cdev, ppm, ttinfo); + cxgbi_ppm_ppod_release(ppm, ttinfo->idx); + dma_unmap_sg(&ppm->pdev->dev, ttinfo->sgl, ttinfo->nents, + DMA_FROM_DEVICE); + } +} + +static inline u32 cxgbi_build_sw_tag(u32 idx, u32 age) +{ + /* assume idx and age both are < 0x7FFF (32767) */ + return (idx << 16) | age; } static int task_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 cxgbi_conn *cconn = tcp_conn->dd_data; + struct cxgbi_device *cdev = cconn->chba->cdev; + struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); + u32 sw_tag = cxgbi_build_sw_tag(task->itt, sess->age); + u32 tag = 0; + int err = -EINVAL; + + if (sc && + (scsi_bidi_cmnd(sc) || sc->sc_data_direction == DMA_FROM_DEVICE) + ) { + struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); + struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; + + scmd_get_params(sc, &ttinfo->sgl, &ttinfo->nents, + &tdata->dlen, 0); + err = cxgbi_ddp_reserve(cconn, tdata, sw_tag, tdata->dlen); + if (!err) + tag = ttinfo->tag; + else + log_debug(1 << CXGBI_DBG_DDP, + "csk 0x%p, R task 0x%p, %u,%u, no ddp.\n", + cconn->cep->csk, task, tdata->dlen, + ttinfo->nents); + } + + if (err < 0) { + err = cxgbi_ppm_make_non_ddp_tag(ppm, sw_tag, &tag); + if (err < 0) + return err; + } + /* the itt need to sent in big-endian order */ + *hdr_itt = (__force itt_t)htonl(tag); + + log_debug(1 << CXGBI_DBG_DDP, + "cdev 0x%p, task 0x%p, 0x%x(0x%x,0x%x)->0x%x/0x%x.\n", + cdev, task, sw_tag, task->itt, sess->age, tag, *hdr_itt); return 0; } void cxgbi_parse_pdu_itt(struct iscsi_conn *conn, itt_t itt, int *idx, int *age) { + struct iscsi_tcp_conn *tcp_conn = conn->dd_data; + struct cxgbi_conn *cconn = tcp_conn->dd_data; + struct cxgbi_device *cdev = cconn->chba->cdev; + struct cxgbi_ppm *ppm = cdev->cdev2ppm(cdev); + u32 tag = ntohl((__force u32)itt); + u32 sw_bits; + + if (ppm) { + if (cxgbi_ppm_is_ddp_tag(ppm, tag)) + sw_bits = cxgbi_ppm_get_tag_caller_data(ppm, tag); + else + sw_bits = cxgbi_ppm_decode_non_ddp_tag(ppm, tag); + } else { + sw_bits = tag; + } + + cxgbi_decode_sw_tag(sw_bits, idx, age); + log_debug(1 << CXGBI_DBG_DDP, + "cdev 0x%p, tag 0x%x/0x%x, -> 0x%x(0x%x,0x%x).\n", + cdev, tag, itt, sw_bits, idx ? *idx : 0xFFFFF, + age ? *age : 0xFF); } EXPORT_SYMBOL_GPL(cxgbi_parse_pdu_itt); @@ -1694,7 +1994,9 @@ int cxgbi_conn_xmit_pdu(struct iscsi_task *task) struct iscsi_tcp_conn *tcp_conn = task->conn->dd_data; struct cxgbi_conn *cconn = tcp_conn->dd_data; struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); + struct cxgbi_task_tag_info *ttinfo = &tdata->ttinfo; struct sk_buff *skb = tdata->skb; + struct cxgbi_sock *csk = NULL; unsigned int datalen; int err; @@ -1704,8 +2006,28 @@ int cxgbi_conn_xmit_pdu(struct iscsi_task *task) return 0; } + if (cconn && cconn->cep) + csk = cconn->cep->csk; + if (!csk) { + log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX, + "task 0x%p, csk gone.\n", task); + return -EPIPE; + } + datalen = skb->data_len; tdata->skb = NULL; + + /* write ppod first if using ofldq to write ppod */ + if (ttinfo->flags & CXGBI_PPOD_INFO_FLAG_VALID) { + struct cxgbi_ppm *ppm = csk->cdev->cdev2ppm(csk->cdev); + + ttinfo->flags &= ~CXGBI_PPOD_INFO_FLAG_VALID; + if (csk->cdev->csk_ddp_set_map(ppm, csk, ttinfo) < 0) + pr_err("task 0x%p, ppod writing using ofldq failed.\n", + task); + /* continue. Let fl get the data */ + } + err = cxgbi_sock_send_pdus(cconn->cep->csk, skb); if (err > 0) { int pdulen = err; @@ -1747,12 +2069,14 @@ EXPORT_SYMBOL_GPL(cxgbi_conn_xmit_pdu); void cxgbi_cleanup_task(struct iscsi_task *task) { + struct iscsi_tcp_task *tcp_task = task->dd_data; struct cxgbi_task_data *tdata = iscsi_task_cxgbi_data(task); log_debug(1 << CXGBI_DBG_ISCSI, "task 0x%p, skb 0x%p, itt 0x%x.\n", task, tdata->skb, task->hdr_itt); + tcp_task->dd_data = NULL; /* never reached the xmit task callout */ if (tdata->skb) __kfree_skb(tdata->skb); @@ -1962,6 +2286,7 @@ int cxgbi_bind_conn(struct iscsi_cls_session *cls_session, struct iscsi_conn *conn = cls_conn->dd_data; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; struct cxgbi_conn *cconn = tcp_conn->dd_data; + struct cxgbi_ppm *ppm; struct iscsi_endpoint *ep; struct cxgbi_endpoint *cep; struct cxgbi_sock *csk; @@ -1975,6 +2300,12 @@ int cxgbi_bind_conn(struct iscsi_cls_session *cls_session, cep = ep->dd_data; csk = cep->csk; + ppm = csk->cdev->cdev2ppm(csk->cdev); + err = csk->cdev->csk_ddp_setup_pgidx(csk, csk->tid, + ppm->tformat.pgsz_idx_dflt, 0); + if (err < 0) + return err; + err = iscsi_conn_bind(cls_session, cls_conn, is_leading); if (err) return -EINVAL; diff --git a/drivers/scsi/cxgbi/libcxgbi.h b/drivers/scsi/cxgbi/libcxgbi.h index 827afa7..e780273 100644 --- a/drivers/scsi/cxgbi/libcxgbi.h +++ b/drivers/scsi/cxgbi/libcxgbi.h @@ -24,9 +24,12 @@ #include #include #include +#include #include #include +#include + enum cxgbi_dbg_flag { CXGBI_DBG_ISCSI, CXGBI_DBG_DDP, @@ -89,8 +92,6 @@ static inline unsigned int cxgbi_ulp_extra_len(int submode) #define CPL_RX_DDP_STATUS_HCRC_SHIFT 20 /* hcrc error */ #define CPL_RX_DDP_STATUS_DCRC_SHIFT 21 /* dcrc error */ -#define DDP_PGIDX_MAX 4 - /* * sge_opaque_hdr - * Opaque version of structure the SGE stores at skb->head of TX_DATA packets @@ -200,6 +201,8 @@ struct cxgbi_skb_tx_cb { enum cxgbi_skcb_flags { SKCBF_TX_NEED_HDR, /* packet needs a header */ + SKCBF_TX_MEM_WRITE, /* memory write */ + SKCBF_TX_FLAG_COMPL, /* wr completion flag */ SKCBF_RX_COALESCED, /* received whole pdu */ SKCBF_RX_HDR, /* received pdu header */ SKCBF_RX_DATA, /* received pdu payload */ @@ -448,6 +451,9 @@ struct cxgbi_ports_map { #define CXGBI_FLAG_DEV_T4 0x2 #define CXGBI_FLAG_ADAPTER_RESET 0x4 #define CXGBI_FLAG_IPV4_SET 0x10 +#define CXGBI_FLAG_USE_PPOD_OFLDQ 0x40 +#define CXGBI_FLAG_DDP_OFF 0x100 + struct cxgbi_device { struct list_head list_head; struct list_head rcu_node; @@ -471,6 +477,12 @@ struct cxgbi_device { struct cxgbi_ports_map pmap; void (*dev_ddp_cleanup)(struct cxgbi_device *); + struct cxgbi_ppm* (*cdev2ppm)(struct cxgbi_device *); + int (*csk_ddp_set_map)(struct cxgbi_ppm *, struct cxgbi_sock *, + struct cxgbi_task_tag_info *); + void (*csk_ddp_clear_map)(struct cxgbi_device *cdev, + struct cxgbi_ppm *, + struct cxgbi_task_tag_info *); int (*csk_ddp_setup_digest)(struct cxgbi_sock *, unsigned int, int, int, int); int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *, @@ -494,6 +506,8 @@ struct cxgbi_conn { struct iscsi_conn *iconn; struct cxgbi_hba *chba; u32 task_idx_bits; + unsigned int ddp_full; + unsigned int ddp_tag_full; }; struct cxgbi_endpoint { @@ -507,9 +521,11 @@ struct cxgbi_task_data { unsigned short nr_frags; struct page_frag frags[MAX_PDU_FRAGS]; struct sk_buff *skb; + unsigned int dlen; unsigned int offset; unsigned int count; unsigned int sgoffset; + struct cxgbi_task_tag_info ttinfo; }; #define iscsi_task_cxgbi_data(task) \ ((task)->dd_data + sizeof(struct iscsi_tcp_task)) @@ -591,4 +607,11 @@ int cxgbi_ddp_init(struct cxgbi_device *, unsigned int, unsigned int, unsigned int, unsigned int); int cxgbi_ddp_cleanup(struct cxgbi_device *); void cxgbi_ddp_page_size_factor(int *); +void cxgbi_ddp_set_one_ppod(struct cxgbi_pagepod *, + struct cxgbi_task_tag_info *, + struct scatterlist **sg_pp, unsigned int *sg_off); +void cxgbi_ddp_ppm_setup(void **ppm_pp, struct cxgbi_device *, + struct cxgbi_tag_format *, unsigned int ppmax, + unsigned int llimit, unsigned int start, + unsigned int rsvd_factor); #endif /*__LIBCXGBI_H__*/