| /* |
| * This file is part of the Chelsio FCoE driver for Linux. |
| * |
| * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/delay.h> |
| #include <linux/ctype.h> |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/compiler.h> |
| #include <linux/export.h> |
| #include <linux/module.h> |
| #include <asm/unaligned.h> |
| #include <asm/page.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_transport_fc.h> |
| |
| #include "csio_hw.h" |
| #include "csio_lnode.h" |
| #include "csio_rnode.h" |
| #include "csio_scsi.h" |
| #include "csio_init.h" |
| |
| int csio_scsi_eqsize = 65536; |
| int csio_scsi_iqlen = 128; |
| int csio_scsi_ioreqs = 2048; |
| uint32_t csio_max_scan_tmo; |
| uint32_t csio_delta_scan_tmo = 5; |
| int csio_lun_qdepth = 32; |
| |
| static int csio_ddp_descs = 128; |
| |
| static int csio_do_abrt_cls(struct csio_hw *, |
| struct csio_ioreq *, bool); |
| |
| static void csio_scsis_uninit(struct csio_ioreq *, enum csio_scsi_ev); |
| static void csio_scsis_io_active(struct csio_ioreq *, enum csio_scsi_ev); |
| static void csio_scsis_tm_active(struct csio_ioreq *, enum csio_scsi_ev); |
| static void csio_scsis_aborting(struct csio_ioreq *, enum csio_scsi_ev); |
| static void csio_scsis_closing(struct csio_ioreq *, enum csio_scsi_ev); |
| static void csio_scsis_shost_cmpl_await(struct csio_ioreq *, enum csio_scsi_ev); |
| |
| /* |
| * csio_scsi_match_io - Match an ioreq with the given SCSI level data. |
| * @ioreq: The I/O request |
| * @sld: Level information |
| * |
| * Should be called with lock held. |
| * |
| */ |
| static bool |
| csio_scsi_match_io(struct csio_ioreq *ioreq, struct csio_scsi_level_data *sld) |
| { |
| struct scsi_cmnd *scmnd = csio_scsi_cmnd(ioreq); |
| |
| switch (sld->level) { |
| case CSIO_LEV_LUN: |
| if (scmnd == NULL) |
| return false; |
| |
| return ((ioreq->lnode == sld->lnode) && |
| (ioreq->rnode == sld->rnode) && |
| ((uint64_t)scmnd->device->lun == sld->oslun)); |
| |
| case CSIO_LEV_RNODE: |
| return ((ioreq->lnode == sld->lnode) && |
| (ioreq->rnode == sld->rnode)); |
| case CSIO_LEV_LNODE: |
| return (ioreq->lnode == sld->lnode); |
| case CSIO_LEV_ALL: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| /* |
| * csio_scsi_gather_active_ios - Gather active I/Os based on level |
| * @scm: SCSI module |
| * @sld: Level information |
| * @dest: The queue where these I/Os have to be gathered. |
| * |
| * Should be called with lock held. |
| */ |
| static void |
| csio_scsi_gather_active_ios(struct csio_scsim *scm, |
| struct csio_scsi_level_data *sld, |
| struct list_head *dest) |
| { |
| struct list_head *tmp, *next; |
| |
| if (list_empty(&scm->active_q)) |
| return; |
| |
| /* Just splice the entire active_q into dest */ |
| if (sld->level == CSIO_LEV_ALL) { |
| list_splice_tail_init(&scm->active_q, dest); |
| return; |
| } |
| |
| list_for_each_safe(tmp, next, &scm->active_q) { |
| if (csio_scsi_match_io((struct csio_ioreq *)tmp, sld)) { |
| list_del_init(tmp); |
| list_add_tail(tmp, dest); |
| } |
| } |
| } |
| |
| static inline bool |
| csio_scsi_itnexus_loss_error(uint16_t error) |
| { |
| switch (error) { |
| case FW_ERR_LINK_DOWN: |
| case FW_RDEV_NOT_READY: |
| case FW_ERR_RDEV_LOST: |
| case FW_ERR_RDEV_LOGO: |
| case FW_ERR_RDEV_IMPL_LOGO: |
| return true; |
| } |
| return false; |
| } |
| |
| /* |
| * csio_scsi_fcp_cmnd - Frame the SCSI FCP command paylod. |
| * @req: IO req structure. |
| * @addr: DMA location to place the payload. |
| * |
| * This routine is shared between FCP_WRITE, FCP_READ and FCP_CMD requests. |
| */ |
| static inline void |
| csio_scsi_fcp_cmnd(struct csio_ioreq *req, void *addr) |
| { |
| struct fcp_cmnd *fcp_cmnd = (struct fcp_cmnd *)addr; |
| struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| |
| /* Check for Task Management */ |
| if (likely(csio_priv(scmnd)->fc_tm_flags == 0)) { |
| int_to_scsilun(scmnd->device->lun, &fcp_cmnd->fc_lun); |
| fcp_cmnd->fc_tm_flags = 0; |
| fcp_cmnd->fc_cmdref = 0; |
| |
| memcpy(fcp_cmnd->fc_cdb, scmnd->cmnd, 16); |
| fcp_cmnd->fc_pri_ta = FCP_PTA_SIMPLE; |
| fcp_cmnd->fc_dl = cpu_to_be32(scsi_bufflen(scmnd)); |
| |
| if (req->nsge) |
| if (req->datadir == DMA_TO_DEVICE) |
| fcp_cmnd->fc_flags = FCP_CFL_WRDATA; |
| else |
| fcp_cmnd->fc_flags = FCP_CFL_RDDATA; |
| else |
| fcp_cmnd->fc_flags = 0; |
| } else { |
| memset(fcp_cmnd, 0, sizeof(*fcp_cmnd)); |
| int_to_scsilun(scmnd->device->lun, &fcp_cmnd->fc_lun); |
| fcp_cmnd->fc_tm_flags = csio_priv(scmnd)->fc_tm_flags; |
| } |
| } |
| |
| /* |
| * csio_scsi_init_cmd_wr - Initialize the SCSI CMD WR. |
| * @req: IO req structure. |
| * @addr: DMA location to place the payload. |
| * @size: Size of WR (including FW WR + immed data + rsp SG entry |
| * |
| * Wrapper for populating fw_scsi_cmd_wr. |
| */ |
| static inline void |
| csio_scsi_init_cmd_wr(struct csio_ioreq *req, void *addr, uint32_t size) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_rnode *rn = req->rnode; |
| struct fw_scsi_cmd_wr *wr = (struct fw_scsi_cmd_wr *)addr; |
| struct csio_dma_buf *dma_buf; |
| uint8_t imm = csio_hw_to_scsim(hw)->proto_cmd_len; |
| |
| wr->op_immdlen = cpu_to_be32(FW_WR_OP_V(FW_SCSI_CMD_WR) | |
| FW_SCSI_CMD_WR_IMMDLEN(imm)); |
| wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(rn->flowid) | |
| FW_WR_LEN16_V( |
| DIV_ROUND_UP(size, 16))); |
| |
| wr->cookie = (uintptr_t) req; |
| wr->iqid = cpu_to_be16(csio_q_physiqid(hw, req->iq_idx)); |
| wr->tmo_val = (uint8_t) req->tmo; |
| wr->r3 = 0; |
| memset(&wr->r5, 0, 8); |
| |
| /* Get RSP DMA buffer */ |
| dma_buf = &req->dma_buf; |
| |
| /* Prepare RSP SGL */ |
| wr->rsp_dmalen = cpu_to_be32(dma_buf->len); |
| wr->rsp_dmaaddr = cpu_to_be64(dma_buf->paddr); |
| |
| wr->r6 = 0; |
| |
| wr->u.fcoe.ctl_pri = 0; |
| wr->u.fcoe.cp_en_class = 0; |
| wr->u.fcoe.r4_lo[0] = 0; |
| wr->u.fcoe.r4_lo[1] = 0; |
| |
| /* Frame a FCP command */ |
| csio_scsi_fcp_cmnd(req, (void *)((uintptr_t)addr + |
| sizeof(struct fw_scsi_cmd_wr))); |
| } |
| |
| #define CSIO_SCSI_CMD_WR_SZ(_imm) \ |
| (sizeof(struct fw_scsi_cmd_wr) + /* WR size */ \ |
| ALIGN((_imm), 16)) /* Immed data */ |
| |
| #define CSIO_SCSI_CMD_WR_SZ_16(_imm) \ |
| (ALIGN(CSIO_SCSI_CMD_WR_SZ((_imm)), 16)) |
| |
| /* |
| * csio_scsi_cmd - Create a SCSI CMD WR. |
| * @req: IO req structure. |
| * |
| * Gets a WR slot in the ingress queue and initializes it with SCSI CMD WR. |
| * |
| */ |
| static inline void |
| csio_scsi_cmd(struct csio_ioreq *req) |
| { |
| struct csio_wr_pair wrp; |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| uint32_t size = CSIO_SCSI_CMD_WR_SZ_16(scsim->proto_cmd_len); |
| |
| req->drv_status = csio_wr_get(hw, req->eq_idx, size, &wrp); |
| if (unlikely(req->drv_status != 0)) |
| return; |
| |
| if (wrp.size1 >= size) { |
| /* Initialize WR in one shot */ |
| csio_scsi_init_cmd_wr(req, wrp.addr1, size); |
| } else { |
| uint8_t *tmpwr = csio_q_eq_wrap(hw, req->eq_idx); |
| |
| /* |
| * Make a temporary copy of the WR and write back |
| * the copy into the WR pair. |
| */ |
| csio_scsi_init_cmd_wr(req, (void *)tmpwr, size); |
| memcpy(wrp.addr1, tmpwr, wrp.size1); |
| memcpy(wrp.addr2, tmpwr + wrp.size1, size - wrp.size1); |
| } |
| } |
| |
| /* |
| * csio_scsi_init_ulptx_dsgl - Fill in a ULP_TX_SC_DSGL |
| * @hw: HW module |
| * @req: IO request |
| * @sgl: ULP TX SGL pointer. |
| * |
| */ |
| static inline void |
| csio_scsi_init_ultptx_dsgl(struct csio_hw *hw, struct csio_ioreq *req, |
| struct ulptx_sgl *sgl) |
| { |
| struct ulptx_sge_pair *sge_pair = NULL; |
| struct scatterlist *sgel; |
| uint32_t i = 0; |
| uint32_t xfer_len; |
| struct list_head *tmp; |
| struct csio_dma_buf *dma_buf; |
| struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| |
| sgl->cmd_nsge = htonl(ULPTX_CMD_V(ULP_TX_SC_DSGL) | ULPTX_MORE_F | |
| ULPTX_NSGE_V(req->nsge)); |
| /* Now add the data SGLs */ |
| if (likely(!req->dcopy)) { |
| scsi_for_each_sg(scmnd, sgel, req->nsge, i) { |
| if (i == 0) { |
| sgl->addr0 = cpu_to_be64(sg_dma_address(sgel)); |
| sgl->len0 = cpu_to_be32(sg_dma_len(sgel)); |
| sge_pair = (struct ulptx_sge_pair *)(sgl + 1); |
| continue; |
| } |
| if ((i - 1) & 0x1) { |
| sge_pair->addr[1] = cpu_to_be64( |
| sg_dma_address(sgel)); |
| sge_pair->len[1] = cpu_to_be32( |
| sg_dma_len(sgel)); |
| sge_pair++; |
| } else { |
| sge_pair->addr[0] = cpu_to_be64( |
| sg_dma_address(sgel)); |
| sge_pair->len[0] = cpu_to_be32( |
| sg_dma_len(sgel)); |
| } |
| } |
| } else { |
| /* Program sg elements with driver's DDP buffer */ |
| xfer_len = scsi_bufflen(scmnd); |
| list_for_each(tmp, &req->gen_list) { |
| dma_buf = (struct csio_dma_buf *)tmp; |
| if (i == 0) { |
| sgl->addr0 = cpu_to_be64(dma_buf->paddr); |
| sgl->len0 = cpu_to_be32( |
| min(xfer_len, dma_buf->len)); |
| sge_pair = (struct ulptx_sge_pair *)(sgl + 1); |
| } else if ((i - 1) & 0x1) { |
| sge_pair->addr[1] = cpu_to_be64(dma_buf->paddr); |
| sge_pair->len[1] = cpu_to_be32( |
| min(xfer_len, dma_buf->len)); |
| sge_pair++; |
| } else { |
| sge_pair->addr[0] = cpu_to_be64(dma_buf->paddr); |
| sge_pair->len[0] = cpu_to_be32( |
| min(xfer_len, dma_buf->len)); |
| } |
| xfer_len -= min(xfer_len, dma_buf->len); |
| i++; |
| } |
| } |
| } |
| |
| /* |
| * csio_scsi_init_read_wr - Initialize the READ SCSI WR. |
| * @req: IO req structure. |
| * @wrp: DMA location to place the payload. |
| * @size: Size of WR (including FW WR + immed data + rsp SG entry + data SGL |
| * |
| * Wrapper for populating fw_scsi_read_wr. |
| */ |
| static inline void |
| csio_scsi_init_read_wr(struct csio_ioreq *req, void *wrp, uint32_t size) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_rnode *rn = req->rnode; |
| struct fw_scsi_read_wr *wr = (struct fw_scsi_read_wr *)wrp; |
| struct ulptx_sgl *sgl; |
| struct csio_dma_buf *dma_buf; |
| uint8_t imm = csio_hw_to_scsim(hw)->proto_cmd_len; |
| struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| |
| wr->op_immdlen = cpu_to_be32(FW_WR_OP_V(FW_SCSI_READ_WR) | |
| FW_SCSI_READ_WR_IMMDLEN(imm)); |
| wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(rn->flowid) | |
| FW_WR_LEN16_V(DIV_ROUND_UP(size, 16))); |
| wr->cookie = (uintptr_t)req; |
| wr->iqid = cpu_to_be16(csio_q_physiqid(hw, req->iq_idx)); |
| wr->tmo_val = (uint8_t)(req->tmo); |
| wr->use_xfer_cnt = 1; |
| wr->xfer_cnt = cpu_to_be32(scsi_bufflen(scmnd)); |
| wr->ini_xfer_cnt = cpu_to_be32(scsi_bufflen(scmnd)); |
| /* Get RSP DMA buffer */ |
| dma_buf = &req->dma_buf; |
| |
| /* Prepare RSP SGL */ |
| wr->rsp_dmalen = cpu_to_be32(dma_buf->len); |
| wr->rsp_dmaaddr = cpu_to_be64(dma_buf->paddr); |
| |
| wr->r4 = 0; |
| |
| wr->u.fcoe.ctl_pri = 0; |
| wr->u.fcoe.cp_en_class = 0; |
| wr->u.fcoe.r3_lo[0] = 0; |
| wr->u.fcoe.r3_lo[1] = 0; |
| csio_scsi_fcp_cmnd(req, (void *)((uintptr_t)wrp + |
| sizeof(struct fw_scsi_read_wr))); |
| |
| /* Move WR pointer past command and immediate data */ |
| sgl = (struct ulptx_sgl *)((uintptr_t)wrp + |
| sizeof(struct fw_scsi_read_wr) + ALIGN(imm, 16)); |
| |
| /* Fill in the DSGL */ |
| csio_scsi_init_ultptx_dsgl(hw, req, sgl); |
| } |
| |
| /* |
| * csio_scsi_init_write_wr - Initialize the WRITE SCSI WR. |
| * @req: IO req structure. |
| * @wrp: DMA location to place the payload. |
| * @size: Size of WR (including FW WR + immed data + rsp SG entry + data SGL |
| * |
| * Wrapper for populating fw_scsi_write_wr. |
| */ |
| static inline void |
| csio_scsi_init_write_wr(struct csio_ioreq *req, void *wrp, uint32_t size) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_rnode *rn = req->rnode; |
| struct fw_scsi_write_wr *wr = (struct fw_scsi_write_wr *)wrp; |
| struct ulptx_sgl *sgl; |
| struct csio_dma_buf *dma_buf; |
| uint8_t imm = csio_hw_to_scsim(hw)->proto_cmd_len; |
| struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| |
| wr->op_immdlen = cpu_to_be32(FW_WR_OP_V(FW_SCSI_WRITE_WR) | |
| FW_SCSI_WRITE_WR_IMMDLEN(imm)); |
| wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(rn->flowid) | |
| FW_WR_LEN16_V(DIV_ROUND_UP(size, 16))); |
| wr->cookie = (uintptr_t)req; |
| wr->iqid = cpu_to_be16(csio_q_physiqid(hw, req->iq_idx)); |
| wr->tmo_val = (uint8_t)(req->tmo); |
| wr->use_xfer_cnt = 1; |
| wr->xfer_cnt = cpu_to_be32(scsi_bufflen(scmnd)); |
| wr->ini_xfer_cnt = cpu_to_be32(scsi_bufflen(scmnd)); |
| /* Get RSP DMA buffer */ |
| dma_buf = &req->dma_buf; |
| |
| /* Prepare RSP SGL */ |
| wr->rsp_dmalen = cpu_to_be32(dma_buf->len); |
| wr->rsp_dmaaddr = cpu_to_be64(dma_buf->paddr); |
| |
| wr->r4 = 0; |
| |
| wr->u.fcoe.ctl_pri = 0; |
| wr->u.fcoe.cp_en_class = 0; |
| wr->u.fcoe.r3_lo[0] = 0; |
| wr->u.fcoe.r3_lo[1] = 0; |
| csio_scsi_fcp_cmnd(req, (void *)((uintptr_t)wrp + |
| sizeof(struct fw_scsi_write_wr))); |
| |
| /* Move WR pointer past command and immediate data */ |
| sgl = (struct ulptx_sgl *)((uintptr_t)wrp + |
| sizeof(struct fw_scsi_write_wr) + ALIGN(imm, 16)); |
| |
| /* Fill in the DSGL */ |
| csio_scsi_init_ultptx_dsgl(hw, req, sgl); |
| } |
| |
| /* Calculate WR size needed for fw_scsi_read_wr/fw_scsi_write_wr */ |
| #define CSIO_SCSI_DATA_WRSZ(req, oper, sz, imm) \ |
| do { \ |
| (sz) = sizeof(struct fw_scsi_##oper##_wr) + /* WR size */ \ |
| ALIGN((imm), 16) + /* Immed data */ \ |
| sizeof(struct ulptx_sgl); /* ulptx_sgl */ \ |
| \ |
| if (unlikely((req)->nsge > 1)) \ |
| (sz) += (sizeof(struct ulptx_sge_pair) * \ |
| (ALIGN(((req)->nsge - 1), 2) / 2)); \ |
| /* Data SGE */ \ |
| } while (0) |
| |
| /* |
| * csio_scsi_read - Create a SCSI READ WR. |
| * @req: IO req structure. |
| * |
| * Gets a WR slot in the ingress queue and initializes it with |
| * SCSI READ WR. |
| * |
| */ |
| static inline void |
| csio_scsi_read(struct csio_ioreq *req) |
| { |
| struct csio_wr_pair wrp; |
| uint32_t size; |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| |
| CSIO_SCSI_DATA_WRSZ(req, read, size, scsim->proto_cmd_len); |
| size = ALIGN(size, 16); |
| |
| req->drv_status = csio_wr_get(hw, req->eq_idx, size, &wrp); |
| if (likely(req->drv_status == 0)) { |
| if (likely(wrp.size1 >= size)) { |
| /* Initialize WR in one shot */ |
| csio_scsi_init_read_wr(req, wrp.addr1, size); |
| } else { |
| uint8_t *tmpwr = csio_q_eq_wrap(hw, req->eq_idx); |
| /* |
| * Make a temporary copy of the WR and write back |
| * the copy into the WR pair. |
| */ |
| csio_scsi_init_read_wr(req, (void *)tmpwr, size); |
| memcpy(wrp.addr1, tmpwr, wrp.size1); |
| memcpy(wrp.addr2, tmpwr + wrp.size1, size - wrp.size1); |
| } |
| } |
| } |
| |
| /* |
| * csio_scsi_write - Create a SCSI WRITE WR. |
| * @req: IO req structure. |
| * |
| * Gets a WR slot in the ingress queue and initializes it with |
| * SCSI WRITE WR. |
| * |
| */ |
| static inline void |
| csio_scsi_write(struct csio_ioreq *req) |
| { |
| struct csio_wr_pair wrp; |
| uint32_t size; |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| |
| CSIO_SCSI_DATA_WRSZ(req, write, size, scsim->proto_cmd_len); |
| size = ALIGN(size, 16); |
| |
| req->drv_status = csio_wr_get(hw, req->eq_idx, size, &wrp); |
| if (likely(req->drv_status == 0)) { |
| if (likely(wrp.size1 >= size)) { |
| /* Initialize WR in one shot */ |
| csio_scsi_init_write_wr(req, wrp.addr1, size); |
| } else { |
| uint8_t *tmpwr = csio_q_eq_wrap(hw, req->eq_idx); |
| /* |
| * Make a temporary copy of the WR and write back |
| * the copy into the WR pair. |
| */ |
| csio_scsi_init_write_wr(req, (void *)tmpwr, size); |
| memcpy(wrp.addr1, tmpwr, wrp.size1); |
| memcpy(wrp.addr2, tmpwr + wrp.size1, size - wrp.size1); |
| } |
| } |
| } |
| |
| /* |
| * csio_setup_ddp - Setup DDP buffers for Read request. |
| * @req: IO req structure. |
| * |
| * Checks SGLs/Data buffers are virtually contiguous required for DDP. |
| * If contiguous,driver posts SGLs in the WR otherwise post internal |
| * buffers for such request for DDP. |
| */ |
| static inline void |
| csio_setup_ddp(struct csio_scsim *scsim, struct csio_ioreq *req) |
| { |
| #ifdef __CSIO_DEBUG__ |
| struct csio_hw *hw = req->lnode->hwp; |
| #endif |
| struct scatterlist *sgel = NULL; |
| struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| uint64_t sg_addr = 0; |
| uint32_t ddp_pagesz = 4096; |
| uint32_t buf_off; |
| struct csio_dma_buf *dma_buf = NULL; |
| uint32_t alloc_len = 0; |
| uint32_t xfer_len = 0; |
| uint32_t sg_len = 0; |
| uint32_t i; |
| |
| scsi_for_each_sg(scmnd, sgel, req->nsge, i) { |
| sg_addr = sg_dma_address(sgel); |
| sg_len = sg_dma_len(sgel); |
| |
| buf_off = sg_addr & (ddp_pagesz - 1); |
| |
| /* Except 1st buffer,all buffer addr have to be Page aligned */ |
| if (i != 0 && buf_off) { |
| csio_dbg(hw, "SGL addr not DDP aligned (%llx:%d)\n", |
| sg_addr, sg_len); |
| goto unaligned; |
| } |
| |
| /* Except last buffer,all buffer must end on page boundary */ |
| if ((i != (req->nsge - 1)) && |
| ((buf_off + sg_len) & (ddp_pagesz - 1))) { |
| csio_dbg(hw, |
| "SGL addr not ending on page boundary" |
| "(%llx:%d)\n", sg_addr, sg_len); |
| goto unaligned; |
| } |
| } |
| |
| /* SGL's are virtually contiguous. HW will DDP to SGLs */ |
| req->dcopy = 0; |
| csio_scsi_read(req); |
| |
| return; |
| |
| unaligned: |
| CSIO_INC_STATS(scsim, n_unaligned); |
| /* |
| * For unaligned SGLs, driver will allocate internal DDP buffer. |
| * Once command is completed data from DDP buffer copied to SGLs |
| */ |
| req->dcopy = 1; |
| |
| /* Use gen_list to store the DDP buffers */ |
| INIT_LIST_HEAD(&req->gen_list); |
| xfer_len = scsi_bufflen(scmnd); |
| |
| i = 0; |
| /* Allocate ddp buffers for this request */ |
| while (alloc_len < xfer_len) { |
| dma_buf = csio_get_scsi_ddp(scsim); |
| if (dma_buf == NULL || i > scsim->max_sge) { |
| req->drv_status = -EBUSY; |
| break; |
| } |
| alloc_len += dma_buf->len; |
| /* Added to IO req */ |
| list_add_tail(&dma_buf->list, &req->gen_list); |
| i++; |
| } |
| |
| if (!req->drv_status) { |
| /* set number of ddp bufs used */ |
| req->nsge = i; |
| csio_scsi_read(req); |
| return; |
| } |
| |
| /* release dma descs */ |
| if (i > 0) |
| csio_put_scsi_ddp_list(scsim, &req->gen_list, i); |
| } |
| |
| /* |
| * csio_scsi_init_abrt_cls_wr - Initialize an ABORT/CLOSE WR. |
| * @req: IO req structure. |
| * @addr: DMA location to place the payload. |
| * @size: Size of WR |
| * @abort: abort OR close |
| * |
| * Wrapper for populating fw_scsi_cmd_wr. |
| */ |
| static inline void |
| csio_scsi_init_abrt_cls_wr(struct csio_ioreq *req, void *addr, uint32_t size, |
| bool abort) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_rnode *rn = req->rnode; |
| struct fw_scsi_abrt_cls_wr *wr = (struct fw_scsi_abrt_cls_wr *)addr; |
| |
| wr->op_immdlen = cpu_to_be32(FW_WR_OP_V(FW_SCSI_ABRT_CLS_WR)); |
| wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID_V(rn->flowid) | |
| FW_WR_LEN16_V( |
| DIV_ROUND_UP(size, 16))); |
| |
| wr->cookie = (uintptr_t) req; |
| wr->iqid = cpu_to_be16(csio_q_physiqid(hw, req->iq_idx)); |
| wr->tmo_val = (uint8_t) req->tmo; |
| /* 0 for CHK_ALL_IO tells FW to look up t_cookie */ |
| wr->sub_opcode_to_chk_all_io = |
| (FW_SCSI_ABRT_CLS_WR_SUB_OPCODE(abort) | |
| FW_SCSI_ABRT_CLS_WR_CHK_ALL_IO(0)); |
| wr->r3[0] = 0; |
| wr->r3[1] = 0; |
| wr->r3[2] = 0; |
| wr->r3[3] = 0; |
| /* Since we re-use the same ioreq for abort as well */ |
| wr->t_cookie = (uintptr_t) req; |
| } |
| |
| static inline void |
| csio_scsi_abrt_cls(struct csio_ioreq *req, bool abort) |
| { |
| struct csio_wr_pair wrp; |
| struct csio_hw *hw = req->lnode->hwp; |
| uint32_t size = ALIGN(sizeof(struct fw_scsi_abrt_cls_wr), 16); |
| |
| req->drv_status = csio_wr_get(hw, req->eq_idx, size, &wrp); |
| if (req->drv_status != 0) |
| return; |
| |
| if (wrp.size1 >= size) { |
| /* Initialize WR in one shot */ |
| csio_scsi_init_abrt_cls_wr(req, wrp.addr1, size, abort); |
| } else { |
| uint8_t *tmpwr = csio_q_eq_wrap(hw, req->eq_idx); |
| /* |
| * Make a temporary copy of the WR and write back |
| * the copy into the WR pair. |
| */ |
| csio_scsi_init_abrt_cls_wr(req, (void *)tmpwr, size, abort); |
| memcpy(wrp.addr1, tmpwr, wrp.size1); |
| memcpy(wrp.addr2, tmpwr + wrp.size1, size - wrp.size1); |
| } |
| } |
| |
| /*****************************************************************************/ |
| /* START: SCSI SM */ |
| /*****************************************************************************/ |
| static void |
| csio_scsis_uninit(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| |
| switch (evt) { |
| case CSIO_SCSIE_START_IO: |
| |
| if (req->nsge) { |
| if (req->datadir == DMA_TO_DEVICE) { |
| req->dcopy = 0; |
| csio_scsi_write(req); |
| } else |
| csio_setup_ddp(scsim, req); |
| } else { |
| csio_scsi_cmd(req); |
| } |
| |
| if (likely(req->drv_status == 0)) { |
| /* change state and enqueue on active_q */ |
| csio_set_state(&req->sm, csio_scsis_io_active); |
| list_add_tail(&req->sm.sm_list, &scsim->active_q); |
| csio_wr_issue(hw, req->eq_idx, false); |
| CSIO_INC_STATS(scsim, n_active); |
| |
| return; |
| } |
| break; |
| |
| case CSIO_SCSIE_START_TM: |
| csio_scsi_cmd(req); |
| if (req->drv_status == 0) { |
| /* |
| * NOTE: We collect the affected I/Os prior to issuing |
| * LUN reset, and not after it. This is to prevent |
| * aborting I/Os that get issued after the LUN reset, |
| * but prior to LUN reset completion (in the event that |
| * the host stack has not blocked I/Os to a LUN that is |
| * being reset. |
| */ |
| csio_set_state(&req->sm, csio_scsis_tm_active); |
| list_add_tail(&req->sm.sm_list, &scsim->active_q); |
| csio_wr_issue(hw, req->eq_idx, false); |
| CSIO_INC_STATS(scsim, n_tm_active); |
| } |
| return; |
| |
| case CSIO_SCSIE_ABORT: |
| case CSIO_SCSIE_CLOSE: |
| /* |
| * NOTE: |
| * We could get here due to : |
| * - a window in the cleanup path of the SCSI module |
| * (csio_scsi_abort_io()). Please see NOTE in this function. |
| * - a window in the time we tried to issue an abort/close |
| * of a request to FW, and the FW completed the request |
| * itself. |
| * Print a message for now, and return INVAL either way. |
| */ |
| req->drv_status = -EINVAL; |
| csio_warn(hw, "Trying to abort/close completed IO:%p!\n", req); |
| break; |
| |
| default: |
| csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| CSIO_DB_ASSERT(0); |
| } |
| } |
| |
| static void |
| csio_scsis_io_active(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| struct csio_rnode *rn; |
| |
| switch (evt) { |
| case CSIO_SCSIE_COMPLETED: |
| CSIO_DEC_STATS(scm, n_active); |
| list_del_init(&req->sm.sm_list); |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| /* |
| * In MSIX mode, with multiple queues, the SCSI compeltions |
| * could reach us sooner than the FW events sent to indicate |
| * I-T nexus loss (link down, remote device logo etc). We |
| * dont want to be returning such I/Os to the upper layer |
| * immediately, since we wouldnt have reported the I-T nexus |
| * loss itself. This forces us to serialize such completions |
| * with the reporting of the I-T nexus loss. Therefore, we |
| * internally queue up such up such completions in the rnode. |
| * The reporting of I-T nexus loss to the upper layer is then |
| * followed by the returning of I/Os in this internal queue. |
| * Having another state alongwith another queue helps us take |
| * actions for events such as ABORT received while we are |
| * in this rnode queue. |
| */ |
| if (unlikely(req->wr_status != FW_SUCCESS)) { |
| rn = req->rnode; |
| /* |
| * FW says remote device is lost, but rnode |
| * doesnt reflect it. |
| */ |
| if (csio_scsi_itnexus_loss_error(req->wr_status) && |
| csio_is_rnode_ready(rn)) { |
| csio_set_state(&req->sm, |
| csio_scsis_shost_cmpl_await); |
| list_add_tail(&req->sm.sm_list, |
| &rn->host_cmpl_q); |
| } |
| } |
| |
| break; |
| |
| case CSIO_SCSIE_ABORT: |
| csio_scsi_abrt_cls(req, SCSI_ABORT); |
| if (req->drv_status == 0) { |
| csio_wr_issue(hw, req->eq_idx, false); |
| csio_set_state(&req->sm, csio_scsis_aborting); |
| } |
| break; |
| |
| case CSIO_SCSIE_CLOSE: |
| csio_scsi_abrt_cls(req, SCSI_CLOSE); |
| if (req->drv_status == 0) { |
| csio_wr_issue(hw, req->eq_idx, false); |
| csio_set_state(&req->sm, csio_scsis_closing); |
| } |
| break; |
| |
| case CSIO_SCSIE_DRVCLEANUP: |
| req->wr_status = FW_HOSTERROR; |
| CSIO_DEC_STATS(scm, n_active); |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| break; |
| |
| default: |
| csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| CSIO_DB_ASSERT(0); |
| } |
| } |
| |
| static void |
| csio_scsis_tm_active(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| |
| switch (evt) { |
| case CSIO_SCSIE_COMPLETED: |
| CSIO_DEC_STATS(scm, n_tm_active); |
| list_del_init(&req->sm.sm_list); |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| |
| break; |
| |
| case CSIO_SCSIE_ABORT: |
| csio_scsi_abrt_cls(req, SCSI_ABORT); |
| if (req->drv_status == 0) { |
| csio_wr_issue(hw, req->eq_idx, false); |
| csio_set_state(&req->sm, csio_scsis_aborting); |
| } |
| break; |
| |
| |
| case CSIO_SCSIE_CLOSE: |
| csio_scsi_abrt_cls(req, SCSI_CLOSE); |
| if (req->drv_status == 0) { |
| csio_wr_issue(hw, req->eq_idx, false); |
| csio_set_state(&req->sm, csio_scsis_closing); |
| } |
| break; |
| |
| case CSIO_SCSIE_DRVCLEANUP: |
| req->wr_status = FW_HOSTERROR; |
| CSIO_DEC_STATS(scm, n_tm_active); |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| break; |
| |
| default: |
| csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| CSIO_DB_ASSERT(0); |
| } |
| } |
| |
| static void |
| csio_scsis_aborting(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| |
| switch (evt) { |
| case CSIO_SCSIE_COMPLETED: |
| csio_dbg(hw, |
| "ioreq %p recvd cmpltd (wr_status:%d) " |
| "in aborting st\n", req, req->wr_status); |
| /* |
| * Use -ECANCELED to explicitly tell the ABORTED event that |
| * the original I/O was returned to driver by FW. |
| * We dont really care if the I/O was returned with success by |
| * FW (because the ABORT and completion of the I/O crossed each |
| * other), or any other return value. Once we are in aborting |
| * state, the success or failure of the I/O is unimportant to |
| * us. |
| */ |
| req->drv_status = -ECANCELED; |
| break; |
| |
| case CSIO_SCSIE_ABORT: |
| CSIO_INC_STATS(scm, n_abrt_dups); |
| break; |
| |
| case CSIO_SCSIE_ABORTED: |
| |
| csio_dbg(hw, "abort of %p return status:0x%x drv_status:%x\n", |
| req, req->wr_status, req->drv_status); |
| /* |
| * Check if original I/O WR completed before the Abort |
| * completion. |
| */ |
| if (req->drv_status != -ECANCELED) { |
| csio_warn(hw, |
| "Abort completed before original I/O," |
| " req:%p\n", req); |
| CSIO_DB_ASSERT(0); |
| } |
| |
| /* |
| * There are the following possible scenarios: |
| * 1. The abort completed successfully, FW returned FW_SUCCESS. |
| * 2. The completion of an I/O and the receipt of |
| * abort for that I/O by the FW crossed each other. |
| * The FW returned FW_EINVAL. The original I/O would have |
| * returned with FW_SUCCESS or any other SCSI error. |
| * 3. The FW couldn't sent the abort out on the wire, as there |
| * was an I-T nexus loss (link down, remote device logged |
| * out etc). FW sent back an appropriate IT nexus loss status |
| * for the abort. |
| * 4. FW sent an abort, but abort timed out (remote device |
| * didnt respond). FW replied back with |
| * FW_SCSI_ABORT_TIMEDOUT. |
| * 5. FW couldn't genuinely abort the request for some reason, |
| * and sent us an error. |
| * |
| * The first 3 scenarios are treated as succesful abort |
| * operations by the host, while the last 2 are failed attempts |
| * to abort. Manipulate the return value of the request |
| * appropriately, so that host can convey these results |
| * back to the upper layer. |
| */ |
| if ((req->wr_status == FW_SUCCESS) || |
| (req->wr_status == FW_EINVAL) || |
| csio_scsi_itnexus_loss_error(req->wr_status)) |
| req->wr_status = FW_SCSI_ABORT_REQUESTED; |
| |
| CSIO_DEC_STATS(scm, n_active); |
| list_del_init(&req->sm.sm_list); |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| break; |
| |
| case CSIO_SCSIE_DRVCLEANUP: |
| req->wr_status = FW_HOSTERROR; |
| CSIO_DEC_STATS(scm, n_active); |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| break; |
| |
| case CSIO_SCSIE_CLOSE: |
| /* |
| * We can receive this event from the module |
| * cleanup paths, if the FW forgot to reply to the ABORT WR |
| * and left this ioreq in this state. For now, just ignore |
| * the event. The CLOSE event is sent to this state, as |
| * the LINK may have already gone down. |
| */ |
| break; |
| |
| default: |
| csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| CSIO_DB_ASSERT(0); |
| } |
| } |
| |
| static void |
| csio_scsis_closing(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| { |
| struct csio_hw *hw = req->lnode->hwp; |
| struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| |
| switch (evt) { |
| case CSIO_SCSIE_COMPLETED: |
| csio_dbg(hw, |
| "ioreq %p recvd cmpltd (wr_status:%d) " |
| "in closing st\n", req, req->wr_status); |
| /* |
| * Use -ECANCELED to explicitly tell the CLOSED event that |
| * the original I/O was returned to driver by FW. |
| * We dont really care if the I/O was returned with success by |
| * FW (because the CLOSE and completion of the I/O crossed each |
| * other), or any other return value. Once we are in aborting |
| * state, the success or failure of the I/O is unimportant to |
| * us. |
| */ |
| req->drv_status = -ECANCELED; |
| break; |
| |
| case CSIO_SCSIE_CLOSED: |
| /* |
| * Check if original I/O WR completed before the Close |
| * completion. |
| */ |
| if (req->drv_status != -ECANCELED) { |
| csio_fatal(hw, |
| "Close completed before original I/O," |
| " req:%p\n", req); |
| CSIO_DB_ASSERT(0); |
| } |
| |
| /* |
| * Either close succeeded, or we issued close to FW at the |
| * same time FW compelted it to us. Either way, the I/O |
| * is closed. |
| */ |
| CSIO_DB_ASSERT((req->wr_status == FW_SUCCESS) || |
| (req->wr_status == FW_EINVAL)); |
| req->wr_status = FW_SCSI_CLOSE_REQUESTED; |
| |
| CSIO_DEC_STATS(scm, n_active); |
| list_del_init(&req->sm.sm_list); |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| break; |
| |
| case CSIO_SCSIE_CLOSE: |
| break; |
| |
| case CSIO_SCSIE_DRVCLEANUP: |
| req->wr_status = FW_HOSTERROR; |
| CSIO_DEC_STATS(scm, n_active); |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| break; |
| |
| default: |
| csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| CSIO_DB_ASSERT(0); |
| } |
| } |
| |
| static void |
| csio_scsis_shost_cmpl_await(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| { |
| switch (evt) { |
| case CSIO_SCSIE_ABORT: |
| case CSIO_SCSIE_CLOSE: |
| /* |
| * Just succeed the abort request, and hope that |
| * the remote device unregister path will cleanup |
| * this I/O to the upper layer within a sane |
| * amount of time. |
| */ |
| /* |
| * A close can come in during a LINK DOWN. The FW would have |
| * returned us the I/O back, but not the remote device lost |
| * FW event. In this interval, if the I/O times out at the upper |
| * layer, a close can come in. Take the same action as abort: |
| * return success, and hope that the remote device unregister |
| * path will cleanup this I/O. If the FW still doesnt send |
| * the msg, the close times out, and the upper layer resorts |
| * to the next level of error recovery. |
| */ |
| req->drv_status = 0; |
| break; |
| case CSIO_SCSIE_DRVCLEANUP: |
| csio_set_state(&req->sm, csio_scsis_uninit); |
| break; |
| default: |
| csio_dbg(req->lnode->hwp, "Unhandled event:%d sent to req:%p\n", |
| evt, req); |
| CSIO_DB_ASSERT(0); |
| } |
| } |
| |
| /* |
| * csio_scsi_cmpl_handler - WR completion handler for SCSI. |
| * @hw: HW module. |
| * @wr: The completed WR from the ingress queue. |
| * @len: Length of the WR. |
| * @flb: Freelist buffer array. |
| * @priv: Private object |
| * @scsiwr: Pointer to SCSI WR. |
| * |
| * This is the WR completion handler called per completion from the |
| * ISR. It is called with lock held. It walks past the RSS and CPL message |
| * header where the actual WR is present. |
| * It then gets the status, WR handle (ioreq pointer) and the len of |
| * the WR, based on WR opcode. Only on a non-good status is the entire |
| * WR copied into the WR cache (ioreq->fw_wr). |
| * The ioreq corresponding to the WR is returned to the caller. |
| * NOTE: The SCSI queue doesnt allocate a freelist today, hence |
| * no freelist buffer is expected. |
| */ |
| struct csio_ioreq * |
| csio_scsi_cmpl_handler(struct csio_hw *hw, void *wr, uint32_t len, |
| struct csio_fl_dma_buf *flb, void *priv, uint8_t **scsiwr) |
| { |
| struct csio_ioreq *ioreq = NULL; |
| struct cpl_fw6_msg *cpl; |
| uint8_t *tempwr; |
| uint8_t status; |
| struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| |
| /* skip RSS header */ |
| cpl = (struct cpl_fw6_msg *)((uintptr_t)wr + sizeof(__be64)); |
| |
| if (unlikely(cpl->opcode != CPL_FW6_MSG)) { |
| csio_warn(hw, "Error: Invalid CPL msg %x recvd on SCSI q\n", |
| cpl->opcode); |
| CSIO_INC_STATS(scm, n_inval_cplop); |
| return NULL; |
| } |
| |
| tempwr = (uint8_t *)(cpl->data); |
| status = csio_wr_status(tempwr); |
| *scsiwr = tempwr; |
| |
| if (likely((*tempwr == FW_SCSI_READ_WR) || |
| (*tempwr == FW_SCSI_WRITE_WR) || |
| (*tempwr == FW_SCSI_CMD_WR))) { |
| ioreq = (struct csio_ioreq *)((uintptr_t) |
| (((struct fw_scsi_read_wr *)tempwr)->cookie)); |
| CSIO_DB_ASSERT(virt_addr_valid(ioreq)); |
| |
| ioreq->wr_status = status; |
| |
| return ioreq; |
| } |
| |
| if (*tempwr == FW_SCSI_ABRT_CLS_WR) { |
| ioreq = (struct csio_ioreq *)((uintptr_t) |
| (((struct fw_scsi_abrt_cls_wr *)tempwr)->cookie)); |
| CSIO_DB_ASSERT(virt_addr_valid(ioreq)); |
| |
| ioreq->wr_status = status; |
| return ioreq; |
| } |
| |
| csio_warn(hw, "WR with invalid opcode in SCSI IQ: %x\n", *tempwr); |
| CSIO_INC_STATS(scm, n_inval_scsiop); |
| return NULL; |
| } |
| |
| /* |
| * csio_scsi_cleanup_io_q - Cleanup the given queue. |
| * @scm: SCSI module. |
| * @q: Queue to be cleaned up. |
| * |
| * Called with lock held. Has to exit with lock held. |
| */ |
| void |
| csio_scsi_cleanup_io_q(struct csio_scsim *scm, struct list_head *q) |
| { |
| struct csio_hw *hw = scm->hw; |
| struct csio_ioreq *ioreq; |
| struct list_head *tmp, *next; |
| struct scsi_cmnd *scmnd; |
| |
| /* Call back the completion routines of the active_q */ |
| list_for_each_safe(tmp, next, q) { |
| ioreq = (struct csio_ioreq *)tmp; |
| csio_scsi_drvcleanup(ioreq); |
| list_del_init(&ioreq->sm.sm_list); |
| scmnd = csio_scsi_cmnd(ioreq); |
| spin_unlock_irq(&hw->lock); |
| |
| /* |
| * Upper layers may have cleared this command, hence this |
| * check to avoid accessing stale references. |
| */ |
| if (scmnd != NULL) |
| ioreq->io_cbfn(hw, ioreq); |
| |
| spin_lock_irq(&scm->freelist_lock); |
| csio_put_scsi_ioreq(scm, ioreq); |
| spin_unlock_irq(&scm->freelist_lock); |
| |
| spin_lock_irq(&hw->lock); |
| } |
| } |
| |
| #define CSIO_SCSI_ABORT_Q_POLL_MS 2000 |
| |
| static void |
| csio_abrt_cls(struct csio_ioreq *ioreq, struct scsi_cmnd *scmnd) |
| { |
| struct csio_lnode *ln = ioreq->lnode; |
| struct csio_hw *hw = ln->hwp; |
| int ready = 0; |
| struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| int rv; |
| |
| if (csio_scsi_cmnd(ioreq) != scmnd) { |
| CSIO_INC_STATS(scsim, n_abrt_race_comp); |
| return; |
| } |
| |
| ready = csio_is_lnode_ready(ln); |
| |
| rv = csio_do_abrt_cls(hw, ioreq, (ready ? SCSI_ABORT : SCSI_CLOSE)); |
| if (rv != 0) { |
| if (ready) |
| CSIO_INC_STATS(scsim, n_abrt_busy_error); |
| else |
| CSIO_INC_STATS(scsim, n_cls_busy_error); |
| } |
| } |
| |
| /* |
| * csio_scsi_abort_io_q - Abort all I/Os on given queue |
| * @scm: SCSI module. |
| * @q: Queue to abort. |
| * @tmo: Timeout in ms |
| * |
| * Attempt to abort all I/Os on given queue, and wait for a max |
| * of tmo milliseconds for them to complete. Returns success |
| * if all I/Os are aborted. Else returns -ETIMEDOUT. |
| * Should be entered with lock held. Exits with lock held. |
| * NOTE: |
| * Lock has to be held across the loop that aborts I/Os, since dropping the lock |
| * in between can cause the list to be corrupted. As a result, the caller |
| * of this function has to ensure that the number of I/os to be aborted |
| * is finite enough to not cause lock-held-for-too-long issues. |
| */ |
| static int |
| csio_scsi_abort_io_q(struct csio_scsim *scm, struct list_head *q, uint32_t tmo) |
| { |
| struct csio_hw *hw = scm->hw; |
| struct list_head *tmp, *next; |
| int count = DIV_ROUND_UP(tmo, CSIO_SCSI_ABORT_Q_POLL_MS); |
| struct scsi_cmnd *scmnd; |
| |
| if (list_empty(q)) |
| return 0; |
| |
| csio_dbg(hw, "Aborting SCSI I/Os\n"); |
| |
| /* Now abort/close I/Os in the queue passed */ |
| list_for_each_safe(tmp, next, q) { |
| scmnd = csio_scsi_cmnd((struct csio_ioreq *)tmp); |
| csio_abrt_cls((struct csio_ioreq *)tmp, scmnd); |
| } |
| |
| /* Wait till all active I/Os are completed/aborted/closed */ |
| while (!list_empty(q) && count--) { |
| spin_unlock_irq(&hw->lock); |
| msleep(CSIO_SCSI_ABORT_Q_POLL_MS); |
| spin_lock_irq(&hw->lock); |
| } |
| |
| /* all aborts completed */ |
| if (list_empty(q)) |
| return 0; |
| |
| return -ETIMEDOUT; |
| } |
| |
| /* |
| * csio_scsim_cleanup_io - Cleanup all I/Os in SCSI module. |
| * @scm: SCSI module. |
| * @abort: abort required. |
| * Called with lock held, should exit with lock held. |
| * Can sleep when waiting for I/Os to complete. |
| */ |
| int |
| csio_scsim_cleanup_io(struct csio_scsim *scm, bool abort) |
| { |
| struct csio_hw *hw = scm->hw; |
| int rv = 0; |
| int count = DIV_ROUND_UP(60 * 1000, CSIO_SCSI_ABORT_Q_POLL_MS); |
| |
| /* No I/Os pending */ |
| if (list_empty(&scm->active_q)) |
| return 0; |
| |
| /* Wait until all active I/Os are completed */ |
| while (!list_empty(&scm->active_q) && count--) { |
| spin_unlock_irq(&hw->lock); |
| msleep(CSIO_SCSI_ABORT_Q_POLL_MS); |
| spin_lock_irq(&hw->lock); |
| } |
| |
| /* all I/Os completed */ |
| if (list_empty(&scm->active_q)) |
| return 0; |
| |
| /* Else abort */ |
| if (abort) { |
| rv = csio_scsi_abort_io_q(scm, &scm->active_q, 30000); |
| if (rv == 0) |
| return rv; |
| csio_dbg(hw, "Some I/O aborts timed out, cleaning up..\n"); |
| } |
| |
| csio_scsi_cleanup_io_q(scm, &scm->active_q); |
| |
| CSIO_DB_ASSERT(list_empty(&scm->active_q)); |
| |
| return rv; |
| } |
| |
| /* |
| * csio_scsim_cleanup_io_lnode - Cleanup all I/Os of given lnode. |
| * @scm: SCSI module. |
| * @lnode: lnode |
| * |
| * Called with lock held, should exit with lock held. |
| * Can sleep (with dropped lock) when waiting for I/Os to complete. |
| */ |
| int |
| csio_scsim_cleanup_io_lnode(struct csio_scsim *scm, struct csio_lnode *ln) |
| { |
| struct csio_hw *hw = scm->hw; |
| struct csio_scsi_level_data sld; |
| int rv; |
| int count = DIV_ROUND_UP(60 * 1000, CSIO_SCSI_ABORT_Q_POLL_MS); |
| |
| csio_dbg(hw, "Gathering all SCSI I/Os on lnode %p\n", ln); |
| |
| sld.level = CSIO_LEV_LNODE; |
| sld.lnode = ln; |
| INIT_LIST_HEAD(&ln->cmpl_q); |
| csio_scsi_gather_active_ios(scm, &sld, &ln->cmpl_q); |
| |
| /* No I/Os pending on this lnode */ |
| if (list_empty(&ln->cmpl_q)) |
| return 0; |
| |
| /* Wait until all active I/Os on this lnode are completed */ |
| while (!list_empty(&ln->cmpl_q) && count--) { |
| spin_unlock_irq(&hw->lock); |
| msleep(CSIO_SCSI_ABORT_Q_POLL_MS); |
| spin_lock_irq(&hw->lock); |
| } |
| |
| /* all I/Os completed */ |
| if (list_empty(&ln->cmpl_q)) |
| return 0; |
| |
| csio_dbg(hw, "Some I/Os pending on ln:%p, aborting them..\n", ln); |
| |
| /* I/Os are pending, abort them */ |
| rv = csio_scsi_abort_io_q(scm, &ln->cmpl_q, 30000); |
| if (rv != 0) { |
| csio_dbg(hw, "Some I/O aborts timed out, cleaning up..\n"); |
| csio_scsi_cleanup_io_q(scm, &ln->cmpl_q); |
| } |
| |
| CSIO_DB_ASSERT(list_empty(&ln->cmpl_q)); |
| |
| return rv; |
| } |
| |
| static ssize_t |
| csio_show_hw_state(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| struct csio_hw *hw = csio_lnode_to_hw(ln); |
| |
| if (csio_is_hw_ready(hw)) |
| return snprintf(buf, PAGE_SIZE, "ready\n"); |
| else |
| return snprintf(buf, PAGE_SIZE, "not ready\n"); |
| } |
| |
| /* Device reset */ |
| static ssize_t |
| csio_device_reset(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| struct csio_hw *hw = csio_lnode_to_hw(ln); |
| |
| if (*buf != '1') |
| return -EINVAL; |
| |
| /* Delete NPIV lnodes */ |
| csio_lnodes_exit(hw, 1); |
| |
| /* Block upper IOs */ |
| csio_lnodes_block_request(hw); |
| |
| spin_lock_irq(&hw->lock); |
| csio_hw_reset(hw); |
| spin_unlock_irq(&hw->lock); |
| |
| /* Unblock upper IOs */ |
| csio_lnodes_unblock_request(hw); |
| return count; |
| } |
| |
| /* disable port */ |
| static ssize_t |
| csio_disable_port(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| struct csio_hw *hw = csio_lnode_to_hw(ln); |
| bool disable; |
| |
| if (*buf == '1' || *buf == '0') |
| disable = (*buf == '1') ? true : false; |
| else |
| return -EINVAL; |
| |
| /* Block upper IOs */ |
| csio_lnodes_block_by_port(hw, ln->portid); |
| |
| spin_lock_irq(&hw->lock); |
| csio_disable_lnodes(hw, ln->portid, disable); |
| spin_unlock_irq(&hw->lock); |
| |
| /* Unblock upper IOs */ |
| csio_lnodes_unblock_by_port(hw, ln->portid); |
| return count; |
| } |
| |
| /* Show debug level */ |
| static ssize_t |
| csio_show_dbg_level(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| |
| return snprintf(buf, PAGE_SIZE, "%x\n", ln->params.log_level); |
| } |
| |
| /* Store debug level */ |
| static ssize_t |
| csio_store_dbg_level(struct device *dev, |
| struct device_attribute *attr, const char *buf, size_t count) |
| { |
| struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| struct csio_hw *hw = csio_lnode_to_hw(ln); |
| uint32_t dbg_level = 0; |
| |
| if (!isdigit(buf[0])) |
| return -EINVAL; |
| |
| if (sscanf(buf, "%i", &dbg_level)) |
| return -EINVAL; |
| |
| ln->params.log_level = dbg_level; |
| hw->params.log_level = dbg_level; |
| |
| return 0; |
| } |
| |
| static DEVICE_ATTR(hw_state, S_IRUGO, csio_show_hw_state, NULL); |
| static DEVICE_ATTR(device_reset, S_IWUSR, NULL, csio_device_reset); |
| static DEVICE_ATTR(disable_port, S_IWUSR, NULL, csio_disable_port); |
| static DEVICE_ATTR(dbg_level, S_IRUGO | S_IWUSR, csio_show_dbg_level, |
| csio_store_dbg_level); |
| |
| static struct attribute *csio_fcoe_lport_attrs[] = { |
| &dev_attr_hw_state.attr, |
| &dev_attr_device_reset.attr, |
| &dev_attr_disable_port.attr, |
| &dev_attr_dbg_level.attr, |
| NULL, |
| }; |
| |
| ATTRIBUTE_GROUPS(csio_fcoe_lport); |
| |
| static ssize_t |
| csio_show_num_reg_rnodes(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| |
| return snprintf(buf, PAGE_SIZE, "%d\n", ln->num_reg_rnodes); |
| } |
| |
| static DEVICE_ATTR(num_reg_rnodes, S_IRUGO, csio_show_num_reg_rnodes, NULL); |
| |
| static struct attribute *csio_fcoe_vport_attrs[] = { |
| &dev_attr_num_reg_rnodes.attr, |
| &dev_attr_dbg_level.attr, |
| NULL, |
| }; |
| |
| ATTRIBUTE_GROUPS(csio_fcoe_vport); |
| |
| static inline uint32_t |
| csio_scsi_copy_to_sgl(struct csio_hw *hw, struct csio_ioreq *req) |
| { |
| struct scsi_cmnd *scmnd = (struct scsi_cmnd *)csio_scsi_cmnd(req); |
| struct scatterlist *sg; |
| uint32_t bytes_left; |
| uint32_t bytes_copy; |
| uint32_t buf_off = 0; |
| uint32_t start_off = 0; |
| uint32_t sg_off = 0; |
| void *sg_addr; |
| void *buf_addr; |
| struct csio_dma_buf *dma_buf; |
| |
| bytes_left = scsi_bufflen(scmnd); |
| sg = scsi_sglist(scmnd); |
| dma_buf = (struct csio_dma_buf *)csio_list_next(&req->gen_list); |
| |
| /* Copy data from driver buffer to SGs of SCSI CMD */ |
| while (bytes_left > 0 && sg && dma_buf) { |
| if (buf_off >= dma_buf->len) { |
| buf_off = 0; |
| dma_buf = (struct csio_dma_buf *) |
| csio_list_next(dma_buf); |
| continue; |
| } |
| |
| if (start_off >= sg->length) { |
| start_off -= sg->length; |
| sg = sg_next(sg); |
| continue; |
| } |
| |
| buf_addr = dma_buf->vaddr + buf_off; |
| sg_off = sg->offset + start_off; |
| bytes_copy = min((dma_buf->len - buf_off), |
| sg->length - start_off); |
| bytes_copy = min((uint32_t)(PAGE_SIZE - (sg_off & ~PAGE_MASK)), |
| bytes_copy); |
| |
| sg_addr = kmap_atomic(sg_page(sg) + (sg_off >> PAGE_SHIFT)); |
| if (!sg_addr) { |
| csio_err(hw, "failed to kmap sg:%p of ioreq:%p\n", |
| sg, req); |
| break; |
| } |
| |
| csio_dbg(hw, "copy_to_sgl:sg_addr %p sg_off %d buf %p len %d\n", |
| sg_addr, sg_off, buf_addr, bytes_copy); |
| memcpy(sg_addr + (sg_off & ~PAGE_MASK), buf_addr, bytes_copy); |
| kunmap_atomic(sg_addr); |
| |
| start_off += bytes_copy; |
| buf_off += bytes_copy; |
| bytes_left -= bytes_copy; |
| } |
| |
| if (bytes_left > 0) |
| return DID_ERROR; |
| else |
| return DID_OK; |
| } |
| |
| /* |
| * csio_scsi_err_handler - SCSI error handler. |
| * @hw: HW module. |
| * @req: IO request. |
| * |
| */ |
| static inline void |
| csio_scsi_err_handler(struct csio_hw *hw, struct csio_ioreq *req) |
| { |
| struct scsi_cmnd *cmnd = (struct scsi_cmnd *)csio_scsi_cmnd(req); |
| struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| struct fcp_resp_with_ext *fcp_resp; |
| struct fcp_resp_rsp_info *rsp_info; |
| struct csio_dma_buf *dma_buf; |
| uint8_t flags, scsi_status = 0; |
| uint32_t host_status = DID_OK; |
| uint32_t rsp_len = 0, sns_len = 0; |
| struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); |
| |
| |
| switch (req->wr_status) { |
| case FW_HOSTERROR: |
| if (unlikely(!csio_is_hw_ready(hw))) |
| return; |
| |
| host_status = DID_ERROR; |
| CSIO_INC_STATS(scm, n_hosterror); |
| |
| break; |
| case FW_SCSI_RSP_ERR: |
| dma_buf = &req->dma_buf; |
| fcp_resp = (struct fcp_resp_with_ext *)dma_buf->vaddr; |
| rsp_info = (struct fcp_resp_rsp_info *)(fcp_resp + 1); |
| flags = fcp_resp->resp.fr_flags; |
| scsi_status = fcp_resp->resp.fr_status; |
| |
| if (flags & FCP_RSP_LEN_VAL) { |
| rsp_len = be32_to_cpu(fcp_resp->ext.fr_rsp_len); |
| if ((rsp_len != 0 && rsp_len != 4 && rsp_len != 8) || |
| (rsp_info->rsp_code != FCP_TMF_CMPL)) { |
| host_status = DID_ERROR; |
| goto out; |
| } |
| } |
| |
| if ((flags & FCP_SNS_LEN_VAL) && fcp_resp->ext.fr_sns_len) { |
| sns_len = be32_to_cpu(fcp_resp->ext.fr_sns_len); |
| if (sns_len > SCSI_SENSE_BUFFERSIZE) |
| sns_len = SCSI_SENSE_BUFFERSIZE; |
| |
| memcpy(cmnd->sense_buffer, |
| &rsp_info->_fr_resvd[0] + rsp_len, sns_len); |
| CSIO_INC_STATS(scm, n_autosense); |
| } |
| |
| scsi_set_resid(cmnd, 0); |
| |
| /* Under run */ |
| if (flags & FCP_RESID_UNDER) { |
| scsi_set_resid(cmnd, |
| be32_to_cpu(fcp_resp->ext.fr_resid)); |
| |
| if (!(flags & FCP_SNS_LEN_VAL) && |
| (scsi_status == SAM_STAT_GOOD) && |
| ((scsi_bufflen(cmnd) - scsi_get_resid(cmnd)) |
| < cmnd->underflow)) |
| host_status = DID_ERROR; |
| } else if (flags & FCP_RESID_OVER) |
| host_status = DID_ERROR; |
| |
| CSIO_INC_STATS(scm, n_rsperror); |
| break; |
| |
| case FW_SCSI_OVER_FLOW_ERR: |
| csio_warn(hw, |
| "Over-flow error,cmnd:0x%x expected len:0x%x" |
| " resid:0x%x\n", cmnd->cmnd[0], |
| scsi_bufflen(cmnd), scsi_get_resid(cmnd)); |
| host_status = DID_ERROR; |
| CSIO_INC_STATS(scm, n_ovflerror); |
| break; |
| |
| case FW_SCSI_UNDER_FLOW_ERR: |
| csio_warn(hw, |
| "Under-flow error,cmnd:0x%x expected" |
| " len:0x%x resid:0x%x lun:0x%llx ssn:0x%x\n", |
| cmnd->cmnd[0], scsi_bufflen(cmnd), |
| scsi_get_resid(cmnd), cmnd->device->lun, |
| rn->flowid); |
| host_status = DID_ERROR; |
| CSIO_INC_STATS(scm, n_unflerror); |
| break; |
| |
| case FW_SCSI_ABORT_REQUESTED: |
| case FW_SCSI_ABORTED: |
| case FW_SCSI_CLOSE_REQUESTED: |
| csio_dbg(hw, "Req %p cmd:%p op:%x %s\n", req, cmnd, |
| cmnd->cmnd[0], |
| (req->wr_status == FW_SCSI_CLOSE_REQUESTED) ? |
| "closed" : "aborted"); |
| /* |
| * csio_eh_abort_handler checks this value to |
| * succeed or fail the abort request. |
| */ |
| host_status = DID_REQUEUE; |
| if (req->wr_status == FW_SCSI_CLOSE_REQUESTED) |
| CSIO_INC_STATS(scm, n_closed); |
| else |
| CSIO_INC_STATS(scm, n_aborted); |
| break; |
| |
| case FW_SCSI_ABORT_TIMEDOUT: |
| /* FW timed out the abort itself */ |
| csio_dbg(hw, "FW timed out abort req:%p cmnd:%p status:%x\n", |
| req, cmnd, req->wr_status); |
| host_status = DID_ERROR; |
| CSIO_INC_STATS(scm, n_abrt_timedout); |
| break; |
| |
| case FW_RDEV_NOT_READY: |
| /* |
| * In firmware, a RDEV can get into this state |
| * temporarily, before moving into dissapeared/lost |
| * state. So, the driver should complete the request equivalent |
| * to device-disappeared! |
| */ |
| CSIO_INC_STATS(scm, n_rdev_nr_error); |
| host_status = DID_ERROR; |
| break; |
| |
| case FW_ERR_RDEV_LOST: |
| CSIO_INC_STATS(scm, n_rdev_lost_error); |
| host_status = DID_ERROR; |
| break; |
| |
| case FW_ERR_RDEV_LOGO: |
| CSIO_INC_STATS(scm, n_rdev_logo_error); |
| host_status = DID_ERROR; |
| break; |
| |
| case FW_ERR_RDEV_IMPL_LOGO: |
| host_status = DID_ERROR; |
| break; |
| |
| case FW_ERR_LINK_DOWN: |
| CSIO_INC_STATS(scm, n_link_down_error); |
| host_status = DID_ERROR; |
| break; |
| |
| case FW_FCOE_NO_XCHG: |
| CSIO_INC_STATS(scm, n_no_xchg_error); |
| host_status = DID_ERROR; |
| break; |
| |
| default: |
| csio_err(hw, "Unknown SCSI FW WR status:%d req:%p cmnd:%p\n", |
| req->wr_status, req, cmnd); |
| CSIO_DB_ASSERT(0); |
| |
| CSIO_INC_STATS(scm, n_unknown_error); |
| host_status = DID_ERROR; |
| break; |
| } |
| |
| out: |
| if (req->nsge > 0) { |
| scsi_dma_unmap(cmnd); |
| if (req->dcopy && (host_status == DID_OK)) |
| host_status = csio_scsi_copy_to_sgl(hw, req); |
| } |
| |
| cmnd->result = (((host_status) << 16) | scsi_status); |
| scsi_done(cmnd); |
| |
| /* Wake up waiting threads */ |
| csio_scsi_cmnd(req) = NULL; |
| complete(&req->cmplobj); |
| } |
| |
| /* |
| * csio_scsi_cbfn - SCSI callback function. |
| * @hw: HW module. |
| * @req: IO request. |
| * |
| */ |
| static void |
| csio_scsi_cbfn(struct csio_hw *hw, struct csio_ioreq *req) |
| { |
| struct scsi_cmnd *cmnd = (struct scsi_cmnd *)csio_scsi_cmnd(req); |
| uint8_t scsi_status = SAM_STAT_GOOD; |
| uint32_t host_status = DID_OK; |
| |
| if (likely(req->wr_status == FW_SUCCESS)) { |
| if (req->nsge > 0) { |
| scsi_dma_unmap(cmnd); |
| if (req->dcopy) |
| host_status = csio_scsi_copy_to_sgl(hw, req); |
| } |
| |
| cmnd->result = (((host_status) << 16) | scsi_status); |
| scsi_done(cmnd); |
| csio_scsi_cmnd(req) = NULL; |
| CSIO_INC_STATS(csio_hw_to_scsim(hw), n_tot_success); |
| } else { |
| /* Error handling */ |
| csio_scsi_err_handler(hw, req); |
| } |
| } |
| |
| /** |
| * csio_queuecommand - Entry point to kickstart an I/O request. |
| * @host: The scsi_host pointer. |
| * @cmnd: The I/O request from ML. |
| * |
| * This routine does the following: |
| * - Checks for HW and Rnode module readiness. |
| * - Gets a free ioreq structure (which is already initialized |
| * to uninit during its allocation). |
| * - Maps SG elements. |
| * - Initializes ioreq members. |
| * - Kicks off the SCSI state machine for this IO. |
| * - Returns busy status on error. |
| */ |
| static int |
| csio_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmnd) |
| { |
| struct csio_lnode *ln = shost_priv(host); |
| struct csio_hw *hw = csio_lnode_to_hw(ln); |
| struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); |
| struct csio_ioreq *ioreq = NULL; |
| unsigned long flags; |
| int nsge = 0; |
| int rv = SCSI_MLQUEUE_HOST_BUSY, nr; |
| int retval; |
| struct csio_scsi_qset *sqset; |
| struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| |
| sqset = &hw->sqset[ln->portid][blk_mq_rq_cpu(scsi_cmd_to_rq(cmnd))]; |
| |
| nr = fc_remote_port_chkready(rport); |
| if (nr) { |
| cmnd->result = nr; |
| CSIO_INC_STATS(scsim, n_rn_nr_error); |
| goto err_done; |
| } |
| |
| if (unlikely(!csio_is_hw_ready(hw))) { |
| cmnd->result = (DID_REQUEUE << 16); |
| CSIO_INC_STATS(scsim, n_hw_nr_error); |
| goto err_done; |
| } |
| |
| /* Get req->nsge, if there are SG elements to be mapped */ |
| nsge = scsi_dma_map(cmnd); |
| if (unlikely(nsge < 0)) { |
| CSIO_INC_STATS(scsim, n_dmamap_error); |
| goto err; |
| } |
| |
| /* Do we support so many mappings? */ |
| if (unlikely(nsge > scsim->max_sge)) { |
| csio_warn(hw, |
| "More SGEs than can be supported." |
| " SGEs: %d, Max SGEs: %d\n", nsge, scsim->max_sge); |
| CSIO_INC_STATS(scsim, n_unsupp_sge_error); |
| goto err_dma_unmap; |
| } |
| |
| /* Get a free ioreq structure - SM is already set to uninit */ |
| ioreq = csio_get_scsi_ioreq_lock(hw, scsim); |
| if (!ioreq) { |
| csio_err(hw, "Out of I/O request elements. Active #:%d\n", |
| scsim->stats.n_active); |
| CSIO_INC_STATS(scsim, n_no_req_error); |
| goto err_dma_unmap; |
| } |
| |
| ioreq->nsge = nsge; |
| ioreq->lnode = ln; |
| ioreq->rnode = rn; |
| ioreq->iq_idx = sqset->iq_idx; |
| ioreq->eq_idx = sqset->eq_idx; |
| ioreq->wr_status = 0; |
| ioreq->drv_status = 0; |
| csio_scsi_cmnd(ioreq) = (void *)cmnd; |
| ioreq->tmo = 0; |
| ioreq->datadir = cmnd->sc_data_direction; |
| |
| if (cmnd->sc_data_direction == DMA_TO_DEVICE) { |
| CSIO_INC_STATS(ln, n_output_requests); |
| ln->stats.n_output_bytes += scsi_bufflen(cmnd); |
| } else if (cmnd->sc_data_direction == DMA_FROM_DEVICE) { |
| CSIO_INC_STATS(ln, n_input_requests); |
| ln->stats.n_input_bytes += scsi_bufflen(cmnd); |
| } else |
| CSIO_INC_STATS(ln, n_control_requests); |
| |
| /* Set cbfn */ |
| ioreq->io_cbfn = csio_scsi_cbfn; |
| |
| /* Needed during abort */ |
| cmnd->host_scribble = (unsigned char *)ioreq; |
| csio_priv(cmnd)->fc_tm_flags = 0; |
| |
| /* Kick off SCSI IO SM on the ioreq */ |
| spin_lock_irqsave(&hw->lock, flags); |
| retval = csio_scsi_start_io(ioreq); |
| spin_unlock_irqrestore(&hw->lock, flags); |
| |
| if (retval != 0) { |
| csio_err(hw, "ioreq: %p couldn't be started, status:%d\n", |
| ioreq, retval); |
| CSIO_INC_STATS(scsim, n_busy_error); |
| goto err_put_req; |
| } |
| |
| return 0; |
| |
| err_put_req: |
| csio_put_scsi_ioreq_lock(hw, scsim, ioreq); |
| err_dma_unmap: |
| if (nsge > 0) |
| scsi_dma_unmap(cmnd); |
| err: |
| return rv; |
| |
| err_done: |
| scsi_done(cmnd); |
| return 0; |
| } |
| |
| static int |
| csio_do_abrt_cls(struct csio_hw *hw, struct csio_ioreq *ioreq, bool abort) |
| { |
| int rv; |
| int cpu = smp_processor_id(); |
| struct csio_lnode *ln = ioreq->lnode; |
| struct csio_scsi_qset *sqset = &hw->sqset[ln->portid][cpu]; |
| |
| ioreq->tmo = CSIO_SCSI_ABRT_TMO_MS; |
| /* |
| * Use current processor queue for posting the abort/close, but retain |
| * the ingress queue ID of the original I/O being aborted/closed - we |
| * need the abort/close completion to be received on the same queue |
| * as the original I/O. |
| */ |
| ioreq->eq_idx = sqset->eq_idx; |
| |
| if (abort == SCSI_ABORT) |
| rv = csio_scsi_abort(ioreq); |
| else |
| rv = csio_scsi_close(ioreq); |
| |
| return rv; |
| } |
| |
| static int |
| csio_eh_abort_handler(struct scsi_cmnd *cmnd) |
| { |
| struct csio_ioreq *ioreq; |
| struct csio_lnode *ln = shost_priv(cmnd->device->host); |
| struct csio_hw *hw = csio_lnode_to_hw(ln); |
| struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| int ready = 0, ret; |
| unsigned long tmo = 0; |
| int rv; |
| struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); |
| |
| ret = fc_block_scsi_eh(cmnd); |
| if (ret) |
| return ret; |
| |
| ioreq = (struct csio_ioreq *)cmnd->host_scribble; |
| if (!ioreq) |
| return SUCCESS; |
| |
| if (!rn) |
| return FAILED; |
| |
| csio_dbg(hw, |
| "Request to abort ioreq:%p cmd:%p cdb:%08llx" |
| " ssni:0x%x lun:%llu iq:0x%x\n", |
| ioreq, cmnd, *((uint64_t *)cmnd->cmnd), rn->flowid, |
| cmnd->device->lun, csio_q_physiqid(hw, ioreq->iq_idx)); |
| |
| if (((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) != cmnd) { |
| CSIO_INC_STATS(scsim, n_abrt_race_comp); |
| return SUCCESS; |
| } |
| |
| ready = csio_is_lnode_ready(ln); |
| tmo = CSIO_SCSI_ABRT_TMO_MS; |
| |
| reinit_completion(&ioreq->cmplobj); |
| spin_lock_irq(&hw->lock); |
| rv = csio_do_abrt_cls(hw, ioreq, (ready ? SCSI_ABORT : SCSI_CLOSE)); |
| spin_unlock_irq(&hw->lock); |
| |
| if (rv != 0) { |
| if (rv == -EINVAL) { |
| /* Return success, if abort/close request issued on |
| * already completed IO |
| */ |
| return SUCCESS; |
| } |
| if (ready) |
| CSIO_INC_STATS(scsim, n_abrt_busy_error); |
| else |
| CSIO_INC_STATS(scsim, n_cls_busy_error); |
| |
| goto inval_scmnd; |
| } |
| |
| wait_for_completion_timeout(&ioreq->cmplobj, msecs_to_jiffies(tmo)); |
| |
| /* FW didnt respond to abort within our timeout */ |
| if (((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == cmnd) { |
| |
| csio_err(hw, "Abort timed out -- req: %p\n", ioreq); |
| CSIO_INC_STATS(scsim, n_abrt_timedout); |
| |
| inval_scmnd: |
| if (ioreq->nsge > 0) |
| scsi_dma_unmap(cmnd); |
| |
| spin_lock_irq(&hw->lock); |
| csio_scsi_cmnd(ioreq) = NULL; |
| spin_unlock_irq(&hw->lock); |
| |
| cmnd->result = (DID_ERROR << 16); |
| scsi_done(cmnd); |
| |
| return FAILED; |
| } |
| |
| /* FW successfully aborted the request */ |
| if (host_byte(cmnd->result) == DID_REQUEUE) { |
| csio_info(hw, |
| "Aborted SCSI command to (%d:%llu) tag %u\n", |
| cmnd->device->id, cmnd->device->lun, |
| scsi_cmd_to_rq(cmnd)->tag); |
| return SUCCESS; |
| } else { |
| csio_info(hw, |
| "Failed to abort SCSI command, (%d:%llu) tag %u\n", |
| cmnd->device->id, cmnd->device->lun, |
| scsi_cmd_to_rq(cmnd)->tag); |
| return FAILED; |
| } |
| } |
| |
| /* |
| * csio_tm_cbfn - TM callback function. |
| * @hw: HW module. |
| * @req: IO request. |
| * |
| * Cache the result in 'cmnd', since ioreq will be freed soon |
| * after we return from here, and the waiting thread shouldnt trust |
| * the ioreq contents. |
| */ |
| static void |
| csio_tm_cbfn(struct csio_hw *hw, struct csio_ioreq *req) |
| { |
| struct scsi_cmnd *cmnd = (struct scsi_cmnd *)csio_scsi_cmnd(req); |
| struct csio_dma_buf *dma_buf; |
| uint8_t flags = 0; |
| struct fcp_resp_with_ext *fcp_resp; |
| struct fcp_resp_rsp_info *rsp_info; |
| |
| csio_dbg(hw, "req: %p in csio_tm_cbfn status: %d\n", |
| req, req->wr_status); |
| |
| /* Cache FW return status */ |
| csio_priv(cmnd)->wr_status = req->wr_status; |
| |
| /* Special handling based on FCP response */ |
| |
| /* |
| * FW returns us this error, if flags were set. FCP4 says |
| * FCP_RSP_LEN_VAL in flags shall be set for TM completions. |
| * So if a target were to set this bit, we expect that the |
| * rsp_code is set to FCP_TMF_CMPL for a successful TM |
| * completion. Any other rsp_code means TM operation failed. |
| * If a target were to just ignore setting flags, we treat |
| * the TM operation as success, and FW returns FW_SUCCESS. |
| */ |
| if (req->wr_status == FW_SCSI_RSP_ERR) { |
| dma_buf = &req->dma_buf; |
| fcp_resp = (struct fcp_resp_with_ext *)dma_buf->vaddr; |
| rsp_info = (struct fcp_resp_rsp_info *)(fcp_resp + 1); |
| |
| flags = fcp_resp->resp.fr_flags; |
| |
| /* Modify return status if flags indicate success */ |
| if (flags & FCP_RSP_LEN_VAL) |
| if (rsp_info->rsp_code == FCP_TMF_CMPL) |
| csio_priv(cmnd)->wr_status = FW_SUCCESS; |
| |
| csio_dbg(hw, "TM FCP rsp code: %d\n", rsp_info->rsp_code); |
| } |
| |
| /* Wake up the TM handler thread */ |
| csio_scsi_cmnd(req) = NULL; |
| } |
| |
| static int |
| csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) |
| { |
| struct csio_lnode *ln = shost_priv(cmnd->device->host); |
| struct csio_hw *hw = csio_lnode_to_hw(ln); |
| struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); |
| struct csio_ioreq *ioreq = NULL; |
| struct csio_scsi_qset *sqset; |
| unsigned long flags; |
| int retval; |
| int count, ret; |
| LIST_HEAD(local_q); |
| struct csio_scsi_level_data sld; |
| |
| if (!rn) |
| goto fail; |
| |
| csio_dbg(hw, "Request to reset LUN:%llu (ssni:0x%x tgtid:%d)\n", |
| cmnd->device->lun, rn->flowid, rn->scsi_id); |
| |
| if (!csio_is_lnode_ready(ln)) { |
| csio_err(hw, |
| "LUN reset cannot be issued on non-ready" |
| " local node vnpi:0x%x (LUN:%llu)\n", |
| ln->vnp_flowid, cmnd->device->lun); |
| goto fail; |
| } |
| |
| /* Lnode is ready, now wait on rport node readiness */ |
| ret = fc_block_scsi_eh(cmnd); |
| if (ret) |
| return ret; |
| |
| /* |
| * If we have blocked in the previous call, at this point, either the |
| * remote node has come back online, or device loss timer has fired |
| * and the remote node is destroyed. Allow the LUN reset only for |
| * the former case, since LUN reset is a TMF I/O on the wire, and we |
| * need a valid session to issue it. |
| */ |
| if (fc_remote_port_chkready(rn->rport)) { |
| csio_err(hw, |
| "LUN reset cannot be issued on non-ready" |
| " remote node ssni:0x%x (LUN:%llu)\n", |
| rn->flowid, cmnd->device->lun); |
| goto fail; |
| } |
| |
| /* Get a free ioreq structure - SM is already set to uninit */ |
| ioreq = csio_get_scsi_ioreq_lock(hw, scsim); |
| |
| if (!ioreq) { |
| csio_err(hw, "Out of IO request elements. Active # :%d\n", |
| scsim->stats.n_active); |
| goto fail; |
| } |
| |
| sqset = &hw->sqset[ln->portid][smp_processor_id()]; |
| ioreq->nsge = 0; |
| ioreq->lnode = ln; |
| ioreq->rnode = rn; |
| ioreq->iq_idx = sqset->iq_idx; |
| ioreq->eq_idx = sqset->eq_idx; |
| |
| csio_scsi_cmnd(ioreq) = cmnd; |
| cmnd->host_scribble = (unsigned char *)ioreq; |
| csio_priv(cmnd)->wr_status = 0; |
| |
| csio_priv(cmnd)->fc_tm_flags = FCP_TMF_LUN_RESET; |
| ioreq->tmo = CSIO_SCSI_LUNRST_TMO_MS / 1000; |
| |
| /* |
| * FW times the LUN reset for ioreq->tmo, so we got to wait a little |
| * longer (10s for now) than that to allow FW to return the timed |
| * out command. |
| */ |
| count = DIV_ROUND_UP((ioreq->tmo + 10) * 1000, CSIO_SCSI_TM_POLL_MS); |
| |
| /* Set cbfn */ |
| ioreq->io_cbfn = csio_tm_cbfn; |
| |
| /* Save of the ioreq info for later use */ |
| sld.level = CSIO_LEV_LUN; |
| sld.lnode = ioreq->lnode; |
| sld.rnode = ioreq->rnode; |
| sld.oslun = cmnd->device->lun; |
| |
| spin_lock_irqsave(&hw->lock, flags); |
| /* Kick off TM SM on the ioreq */ |
| retval = csio_scsi_start_tm(ioreq); |
| spin_unlock_irqrestore(&hw->lock, flags); |
| |
| if (retval != 0) { |
| csio_err(hw, "Failed to issue LUN reset, req:%p, status:%d\n", |
| ioreq, retval); |
| goto fail_ret_ioreq; |
| } |
| |
| csio_dbg(hw, "Waiting max %d secs for LUN reset completion\n", |
| count * (CSIO_SCSI_TM_POLL_MS / 1000)); |
| /* Wait for completion */ |
| while ((((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == cmnd) |
| && count--) |
| msleep(CSIO_SCSI_TM_POLL_MS); |
| |
| /* LUN reset timed-out */ |
| if (((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == cmnd) { |
| csio_err(hw, "LUN reset (%d:%llu) timed out\n", |
| cmnd->device->id, cmnd->device->lun); |
| |
| spin_lock_irq(&hw->lock); |
| csio_scsi_drvcleanup(ioreq); |
| list_del_init(&ioreq->sm.sm_list); |
| spin_unlock_irq(&hw->lock); |
| |
| goto fail_ret_ioreq; |
| } |
| |
| /* LUN reset returned, check cached status */ |
| if (csio_priv(cmnd)->wr_status != FW_SUCCESS) { |
| csio_err(hw, "LUN reset failed (%d:%llu), status: %d\n", |
| cmnd->device->id, cmnd->device->lun, |
| csio_priv(cmnd)->wr_status); |
| goto fail; |
| } |
| |
| /* LUN reset succeeded, Start aborting affected I/Os */ |
| /* |
| * Since the host guarantees during LUN reset that there |
| * will not be any more I/Os to that LUN, until the LUN reset |
| * completes, we gather pending I/Os after the LUN reset. |
| */ |
| spin_lock_irq(&hw->lock); |
| csio_scsi_gather_active_ios(scsim, &sld, &local_q); |
| |
| retval = csio_scsi_abort_io_q(scsim, &local_q, 30000); |
| spin_unlock_irq(&hw->lock); |
| |
| /* Aborts may have timed out */ |
| if (retval != 0) { |
| csio_err(hw, |
| "Attempt to abort I/Os during LUN reset of %llu" |
| " returned %d\n", cmnd->device->lun, retval); |
| /* Return I/Os back to active_q */ |
| spin_lock_irq(&hw->lock); |
| list_splice_tail_init(&local_q, &scsim->active_q); |
| spin_unlock_irq(&hw->lock); |
| goto fail; |
| } |
| |
| CSIO_INC_STATS(rn, n_lun_rst); |
| |
| csio_info(hw, "LUN reset occurred (%d:%llu)\n", |
| cmnd->device->id, cmnd->device->lun); |
| |
| return SUCCESS; |
| |
| fail_ret_ioreq: |
| csio_put_scsi_ioreq_lock(hw, scsim, ioreq); |
| fail: |
| CSIO_INC_STATS(rn, n_lun_rst_fail); |
| return FAILED; |
| } |
| |
| static int |
| csio_slave_alloc(struct scsi_device *sdev) |
| { |
| struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| |
| if (!rport || fc_remote_port_chkready(rport)) |
| return -ENXIO; |
| |
| sdev->hostdata = *((struct csio_lnode **)(rport->dd_data)); |
| |
| return 0; |
| } |
| |
| static int |
| csio_slave_configure(struct scsi_device *sdev) |
| { |
| scsi_change_queue_depth(sdev, csio_lun_qdepth); |
| return 0; |
| } |
| |
| static void |
| csio_slave_destroy(struct scsi_device *sdev) |
| { |
| sdev->hostdata = NULL; |
| } |
| |
| static int |
| csio_scan_finished(struct Scsi_Host *shost, unsigned long time) |
| { |
| struct csio_lnode *ln = shost_priv(shost); |
| int rv = 1; |
| |
| spin_lock_irq(shost->host_lock); |
| if (!ln->hwp || csio_list_deleted(&ln->sm.sm_list)) |
| goto out; |
| |
| rv = csio_scan_done(ln, jiffies, time, csio_max_scan_tmo * HZ, |
| csio_delta_scan_tmo * HZ); |
| out: |
| spin_unlock_irq(shost->host_lock); |
| |
| return rv; |
| } |
| |
| struct scsi_host_template csio_fcoe_shost_template = { |
| .module = THIS_MODULE, |
| .name = CSIO_DRV_DESC, |
| .proc_name = KBUILD_MODNAME, |
| .queuecommand = csio_queuecommand, |
| .cmd_size = sizeof(struct csio_cmd_priv), |
| .eh_timed_out = fc_eh_timed_out, |
| .eh_abort_handler = csio_eh_abort_handler, |
| .eh_device_reset_handler = csio_eh_lun_reset_handler, |
| .slave_alloc = csio_slave_alloc, |
| .slave_configure = csio_slave_configure, |
| .slave_destroy = csio_slave_destroy, |
| .scan_finished = csio_scan_finished, |
| .this_id = -1, |
| .sg_tablesize = CSIO_SCSI_MAX_SGE, |
| .cmd_per_lun = CSIO_MAX_CMD_PER_LUN, |
| .shost_groups = csio_fcoe_lport_groups, |
| .max_sectors = CSIO_MAX_SECTOR_SIZE, |
| }; |
| |
| struct scsi_host_template csio_fcoe_shost_vport_template = { |
| .module = THIS_MODULE, |
| .name = CSIO_DRV_DESC, |
| .proc_name = KBUILD_MODNAME, |
| .queuecommand = csio_queuecommand, |
| .eh_timed_out = fc_eh_timed_out, |
| .eh_abort_handler = csio_eh_abort_handler, |
| .eh_device_reset_handler = csio_eh_lun_reset_handler, |
| .slave_alloc = csio_slave_alloc, |
| .slave_configure = csio_slave_configure, |
| .slave_destroy = csio_slave_destroy, |
| .scan_finished = csio_scan_finished, |
| .this_id = -1, |
| .sg_tablesize = CSIO_SCSI_MAX_SGE, |
| .cmd_per_lun = CSIO_MAX_CMD_PER_LUN, |
| .shost_groups = csio_fcoe_vport_groups, |
| .max_sectors = CSIO_MAX_SECTOR_SIZE, |
| }; |
| |
| /* |
| * csio_scsi_alloc_ddp_bufs - Allocate buffers for DDP of unaligned SGLs. |
| * @scm: SCSI Module |
| * @hw: HW device. |
| * @buf_size: buffer size |
| * @num_buf : Number of buffers. |
| * |
| * This routine allocates DMA buffers required for SCSI Data xfer, if |
| * each SGL buffer for a SCSI Read request posted by SCSI midlayer are |
| * not virtually contiguous. |
| */ |
| static int |
| csio_scsi_alloc_ddp_bufs(struct csio_scsim *scm, struct csio_hw *hw, |
| int buf_size, int num_buf) |
| { |
| int n = 0; |
| struct list_head *tmp; |
| struct csio_dma_buf *ddp_desc = NULL; |
| uint32_t unit_size = 0; |
| |
| if (!num_buf) |
| return 0; |
| |
| if (!buf_size) |
| return -EINVAL; |
| |
| INIT_LIST_HEAD(&scm->ddp_freelist); |
| |
| /* Align buf size to page size */ |
| buf_size = (buf_size + PAGE_SIZE - 1) & PAGE_MASK; |
| /* Initialize dma descriptors */ |
| for (n = 0; n < num_buf; n++) { |
| /* Set unit size to request size */ |
| unit_size = buf_size; |
| ddp_desc = kzalloc(sizeof(struct csio_dma_buf), GFP_KERNEL); |
| if (!ddp_desc) { |
| csio_err(hw, |
| "Failed to allocate ddp descriptors," |
| " Num allocated = %d.\n", |
| scm->stats.n_free_ddp); |
| goto no_mem; |
| } |
| |
| /* Allocate Dma buffers for DDP */ |
| ddp_desc->vaddr = dma_alloc_coherent(&hw->pdev->dev, unit_size, |
| &ddp_desc->paddr, GFP_KERNEL); |
| if (!ddp_desc->vaddr) { |
| csio_err(hw, |
| "SCSI response DMA buffer (ddp) allocation" |
| " failed!\n"); |
| kfree(ddp_desc); |
| goto no_mem; |
| } |
| |
| ddp_desc->len = unit_size; |
| |
| /* Added it to scsi ddp freelist */ |
| list_add_tail(&ddp_desc->list, &scm->ddp_freelist); |
| CSIO_INC_STATS(scm, n_free_ddp); |
| } |
| |
| return 0; |
| no_mem: |
| /* release dma descs back to freelist and free dma memory */ |
| list_for_each(tmp, &scm->ddp_freelist) { |
| ddp_desc = (struct csio_dma_buf *) tmp; |
| tmp = csio_list_prev(tmp); |
| dma_free_coherent(&hw->pdev->dev, ddp_desc->len, |
| ddp_desc->vaddr, ddp_desc->paddr); |
| list_del_init(&ddp_desc->list); |
| kfree(ddp_desc); |
| } |
| scm->stats.n_free_ddp = 0; |
| |
| return -ENOMEM; |
| } |
| |
| /* |
| * csio_scsi_free_ddp_bufs - free DDP buffers of unaligned SGLs. |
| * @scm: SCSI Module |
| * @hw: HW device. |
| * |
| * This routine frees ddp buffers. |
| */ |
| static void |
| csio_scsi_free_ddp_bufs(struct csio_scsim *scm, struct csio_hw *hw) |
| { |
| struct list_head *tmp; |
| struct csio_dma_buf *ddp_desc; |
| |
| /* release dma descs back to freelist and free dma memory */ |
| list_for_each(tmp, &scm->ddp_freelist) { |
| ddp_desc = (struct csio_dma_buf *) tmp; |
| tmp = csio_list_prev(tmp); |
| dma_free_coherent(&hw->pdev->dev, ddp_desc->len, |
| ddp_desc->vaddr, ddp_desc->paddr); |
| list_del_init(&ddp_desc->list); |
| kfree(ddp_desc); |
| } |
| scm->stats.n_free_ddp = 0; |
| } |
| |
| /** |
| * csio_scsim_init - Initialize SCSI Module |
| * @scm: SCSI Module |
| * @hw: HW module |
| * |
| */ |
| int |
| csio_scsim_init(struct csio_scsim *scm, struct csio_hw *hw) |
| { |
| int i; |
| struct csio_ioreq *ioreq; |
| struct csio_dma_buf *dma_buf; |
| |
| INIT_LIST_HEAD(&scm->active_q); |
| scm->hw = hw; |
| |
| scm->proto_cmd_len = sizeof(struct fcp_cmnd); |
| scm->proto_rsp_len = CSIO_SCSI_RSP_LEN; |
| scm->max_sge = CSIO_SCSI_MAX_SGE; |
| |
| spin_lock_init(&scm->freelist_lock); |
| |
| /* Pre-allocate ioreqs and initialize them */ |
| INIT_LIST_HEAD(&scm->ioreq_freelist); |
| for (i = 0; i < csio_scsi_ioreqs; i++) { |
| |
| ioreq = kzalloc(sizeof(struct csio_ioreq), GFP_KERNEL); |
| if (!ioreq) { |
| csio_err(hw, |
| "I/O request element allocation failed, " |
| " Num allocated = %d.\n", |
| scm->stats.n_free_ioreq); |
| |
| goto free_ioreq; |
| } |
| |
| /* Allocate Dma buffers for Response Payload */ |
| dma_buf = &ioreq->dma_buf; |
| dma_buf->vaddr = dma_pool_alloc(hw->scsi_dma_pool, GFP_KERNEL, |
| &dma_buf->paddr); |
| if (!dma_buf->vaddr) { |
| csio_err(hw, |
| "SCSI response DMA buffer allocation" |
| " failed!\n"); |
| kfree(ioreq); |
| goto free_ioreq; |
| } |
| |
| dma_buf->len = scm->proto_rsp_len; |
| |
| /* Set state to uninit */ |
| csio_init_state(&ioreq->sm, csio_scsis_uninit); |
| INIT_LIST_HEAD(&ioreq->gen_list); |
| init_completion(&ioreq->cmplobj); |
| |
| list_add_tail(&ioreq->sm.sm_list, &scm->ioreq_freelist); |
| CSIO_INC_STATS(scm, n_free_ioreq); |
| } |
| |
| if (csio_scsi_alloc_ddp_bufs(scm, hw, PAGE_SIZE, csio_ddp_descs)) |
| goto free_ioreq; |
| |
| return 0; |
| |
| free_ioreq: |
| /* |
| * Free up existing allocations, since an error |
| * from here means we are returning for good |
| */ |
| while (!list_empty(&scm->ioreq_freelist)) { |
| struct csio_sm *tmp; |
| |
| tmp = list_first_entry(&scm->ioreq_freelist, |
| struct csio_sm, sm_list); |
| list_del_init(&tmp->sm_list); |
| ioreq = (struct csio_ioreq *)tmp; |
| |
| dma_buf = &ioreq->dma_buf; |
| dma_pool_free(hw->scsi_dma_pool, dma_buf->vaddr, |
| dma_buf->paddr); |
| |
| kfree(ioreq); |
| } |
| |
| scm->stats.n_free_ioreq = 0; |
| |
| return -ENOMEM; |
| } |
| |
| /** |
| * csio_scsim_exit: Uninitialize SCSI Module |
| * @scm: SCSI Module |
| * |
| */ |
| void |
| csio_scsim_exit(struct csio_scsim *scm) |
| { |
| struct csio_ioreq *ioreq; |
| struct csio_dma_buf *dma_buf; |
| |
| while (!list_empty(&scm->ioreq_freelist)) { |
| struct csio_sm *tmp; |
| |
| tmp = list_first_entry(&scm->ioreq_freelist, |
| struct csio_sm, sm_list); |
| list_del_init(&tmp->sm_list); |
| ioreq = (struct csio_ioreq *)tmp; |
| |
| dma_buf = &ioreq->dma_buf; |
| dma_pool_free(scm->hw->scsi_dma_pool, dma_buf->vaddr, |
| dma_buf->paddr); |
| |
| kfree(ioreq); |
| } |
| |
| scm->stats.n_free_ioreq = 0; |
| |
| csio_scsi_free_ddp_bufs(scm, scm->hw); |
| } |