diff options
Diffstat (limited to 'drivers/infiniband/ulp/isert/ib_isert.c')
-rw-r--r-- | drivers/infiniband/ulp/isert/ib_isert.c | 828 |
1 files changed, 639 insertions, 189 deletions
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c index 8ee228e9ab5..c98fdb18593 100644 --- a/drivers/infiniband/ulp/isert/ib_isert.c +++ b/drivers/infiniband/ulp/isert/ib_isert.c @@ -51,6 +51,8 @@ isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); static int isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, struct isert_rdma_wr *wr); +static int +isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); static void isert_qp_event_callback(struct ib_event *e, void *context) @@ -87,7 +89,8 @@ isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) } static int -isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) +isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id, + u8 protection) { struct isert_device *device = isert_conn->conn_device; struct ib_qp_init_attr attr; @@ -119,6 +122,8 @@ isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) attr.cap.max_recv_sge = 1; attr.sq_sig_type = IB_SIGNAL_REQ_WR; attr.qp_type = IB_QPT_RC; + if (protection) + attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; pr_debug("isert_conn_setup_qp cma_id->device: %p\n", cma_id->device); @@ -226,7 +231,8 @@ isert_create_device_ib_res(struct isert_device *device) return ret; /* asign function handlers */ - if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) { + if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS && + dev_attr->device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) { device->use_fastreg = 1; device->reg_rdma_mem = isert_reg_rdma; device->unreg_rdma_mem = isert_unreg_rdma; @@ -236,13 +242,18 @@ isert_create_device_ib_res(struct isert_device *device) device->unreg_rdma_mem = isert_unmap_cmd; } + /* Check signature cap */ + device->pi_capable = dev_attr->device_cap_flags & + IB_DEVICE_SIGNATURE_HANDOVER ? true : false; + device->cqs_used = min_t(int, num_online_cpus(), device->ib_device->num_comp_vectors); device->cqs_used = min(ISERT_MAX_CQ, device->cqs_used); pr_debug("Using %d CQs, device %s supports %d vectors support " - "Fast registration %d\n", + "Fast registration %d pi_capable %d\n", device->cqs_used, device->ib_device->name, - device->ib_device->num_comp_vectors, device->use_fastreg); + device->ib_device->num_comp_vectors, device->use_fastreg, + device->pi_capable); device->cq_desc = kzalloc(sizeof(struct isert_cq_desc) * device->cqs_used, GFP_KERNEL); if (!device->cq_desc) { @@ -395,6 +406,12 @@ isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) list_del(&fr_desc->list); ib_free_fast_reg_page_list(fr_desc->data_frpl); ib_dereg_mr(fr_desc->data_mr); + if (fr_desc->pi_ctx) { + ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl); + ib_dereg_mr(fr_desc->pi_ctx->prot_mr); + ib_destroy_mr(fr_desc->pi_ctx->sig_mr); + kfree(fr_desc->pi_ctx); + } kfree(fr_desc); ++i; } @@ -406,8 +423,10 @@ isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) static int isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, - struct fast_reg_descriptor *fr_desc) + struct fast_reg_descriptor *fr_desc, u8 protection) { + int ret; + fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device, ISCSI_ISER_SG_TABLESIZE); if (IS_ERR(fr_desc->data_frpl)) { @@ -420,27 +439,88 @@ isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, if (IS_ERR(fr_desc->data_mr)) { pr_err("Failed to allocate data frmr err=%ld\n", PTR_ERR(fr_desc->data_mr)); - ib_free_fast_reg_page_list(fr_desc->data_frpl); - return PTR_ERR(fr_desc->data_mr); + ret = PTR_ERR(fr_desc->data_mr); + goto err_data_frpl; } pr_debug("Create fr_desc %p page_list %p\n", fr_desc, fr_desc->data_frpl->page_list); + fr_desc->ind |= ISERT_DATA_KEY_VALID; + + if (protection) { + struct ib_mr_init_attr mr_init_attr = {0}; + struct pi_context *pi_ctx; + + fr_desc->pi_ctx = kzalloc(sizeof(*fr_desc->pi_ctx), GFP_KERNEL); + if (!fr_desc->pi_ctx) { + pr_err("Failed to allocate pi context\n"); + ret = -ENOMEM; + goto err_data_mr; + } + pi_ctx = fr_desc->pi_ctx; + + pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(ib_device, + ISCSI_ISER_SG_TABLESIZE); + if (IS_ERR(pi_ctx->prot_frpl)) { + pr_err("Failed to allocate prot frpl err=%ld\n", + PTR_ERR(pi_ctx->prot_frpl)); + ret = PTR_ERR(pi_ctx->prot_frpl); + goto err_pi_ctx; + } - fr_desc->valid = true; + pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); + if (IS_ERR(pi_ctx->prot_mr)) { + pr_err("Failed to allocate prot frmr err=%ld\n", + PTR_ERR(pi_ctx->prot_mr)); + ret = PTR_ERR(pi_ctx->prot_mr); + goto err_prot_frpl; + } + fr_desc->ind |= ISERT_PROT_KEY_VALID; + + mr_init_attr.max_reg_descriptors = 2; + mr_init_attr.flags |= IB_MR_SIGNATURE_EN; + pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr); + if (IS_ERR(pi_ctx->sig_mr)) { + pr_err("Failed to allocate signature enabled mr err=%ld\n", + PTR_ERR(pi_ctx->sig_mr)); + ret = PTR_ERR(pi_ctx->sig_mr); + goto err_prot_mr; + } + fr_desc->ind |= ISERT_SIG_KEY_VALID; + } + fr_desc->ind &= ~ISERT_PROTECTED; return 0; +err_prot_mr: + ib_dereg_mr(fr_desc->pi_ctx->prot_mr); +err_prot_frpl: + ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl); +err_pi_ctx: + kfree(fr_desc->pi_ctx); +err_data_mr: + ib_dereg_mr(fr_desc->data_mr); +err_data_frpl: + ib_free_fast_reg_page_list(fr_desc->data_frpl); + + return ret; } static int -isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) +isert_conn_create_fastreg_pool(struct isert_conn *isert_conn, u8 pi_support) { struct fast_reg_descriptor *fr_desc; struct isert_device *device = isert_conn->conn_device; - int i, ret; + struct se_session *se_sess = isert_conn->conn->sess->se_sess; + struct se_node_acl *se_nacl = se_sess->se_node_acl; + int i, ret, tag_num; + /* + * Setup the number of FRMRs based upon the number of tags + * available to session in iscsi_target_locate_portal(). + */ + tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth); + tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; - INIT_LIST_HEAD(&isert_conn->conn_fr_pool); isert_conn->conn_fr_pool_size = 0; - for (i = 0; i < ISCSI_DEF_XMIT_CMDS_MAX; i++) { + for (i = 0; i < tag_num; i++) { fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); if (!fr_desc) { pr_err("Failed to allocate fast_reg descriptor\n"); @@ -449,7 +529,8 @@ isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) } ret = isert_create_fr_desc(device->ib_device, - isert_conn->conn_pd, fr_desc); + isert_conn->conn_pd, fr_desc, + pi_support); if (ret) { pr_err("Failed to create fastreg descriptor err=%d\n", ret); @@ -480,6 +561,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) struct isert_device *device; struct ib_device *ib_dev = cma_id->device; int ret = 0; + u8 pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi; pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n", cma_id, cma_id->context); @@ -498,6 +580,7 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) kref_get(&isert_conn->conn_kref); mutex_init(&isert_conn->conn_mutex); spin_lock_init(&isert_conn->conn_lock); + INIT_LIST_HEAD(&isert_conn->conn_fr_pool); cma_id->context = isert_conn; isert_conn->conn_cm_id = cma_id; @@ -569,16 +652,13 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) goto out_mr; } - if (device->use_fastreg) { - ret = isert_conn_create_fastreg_pool(isert_conn); - if (ret) { - pr_err("Conn: %p failed to create fastreg pool\n", - isert_conn); - goto out_fastreg; - } + if (pi_support && !device->pi_capable) { + pr_err("Protection information requested but not supported\n"); + ret = -EINVAL; + goto out_mr; } - ret = isert_conn_setup_qp(isert_conn, cma_id); + ret = isert_conn_setup_qp(isert_conn, cma_id, pi_support); if (ret) goto out_conn_dev; @@ -591,9 +671,6 @@ isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) return 0; out_conn_dev: - if (device->use_fastreg) - isert_conn_free_fastreg_pool(isert_conn); -out_fastreg: ib_dereg_mr(isert_conn->conn_mr); out_mr: ib_dealloc_pd(isert_conn->conn_pd); @@ -967,6 +1044,18 @@ isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, } if (!login->login_failed) { if (login->login_complete) { + if (isert_conn->conn_device->use_fastreg) { + u8 pi_support = login->np->tpg_np->tpg->tpg_attrib.t10_pi; + + ret = isert_conn_create_fastreg_pool(isert_conn, + pi_support); + if (ret) { + pr_err("Conn: %p failed to create" + " fastreg pool\n", isert_conn); + return ret; + } + } + ret = isert_alloc_rx_descriptors(isert_conn); if (ret) return ret; @@ -1392,19 +1481,60 @@ isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn, } } +static int +isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, + struct scatterlist *sg, u32 nents, u32 length, u32 offset, + enum iser_ib_op_code op, struct isert_data_buf *data) +{ + struct ib_device *ib_dev = isert_conn->conn_cm_id->device; + + data->dma_dir = op == ISER_IB_RDMA_WRITE ? + DMA_TO_DEVICE : DMA_FROM_DEVICE; + + data->len = length - offset; + data->offset = offset; + data->sg_off = data->offset / PAGE_SIZE; + + data->sg = &sg[data->sg_off]; + data->nents = min_t(unsigned int, nents - data->sg_off, + ISCSI_ISER_SG_TABLESIZE); + data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * + PAGE_SIZE); + + data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, + data->dma_dir); + if (unlikely(!data->dma_nents)) { + pr_err("Cmd: unable to dma map SGs %p\n", sg); + return -EINVAL; + } + + pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", + isert_cmd, data->dma_nents, data->sg, data->nents, data->len); + + return 0; +} + +static void +isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) +{ + struct ib_device *ib_dev = isert_conn->conn_cm_id->device; + + ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); + memset(data, 0, sizeof(*data)); +} + + + static void isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) { struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; - struct ib_device *ib_dev = isert_conn->conn_cm_id->device; pr_debug("isert_unmap_cmd: %p\n", isert_cmd); - if (wr->sge) { + + if (wr->data.sg) { pr_debug("isert_unmap_cmd: %p unmap_sg op\n", isert_cmd); - ib_dma_unmap_sg(ib_dev, wr->sge, wr->num_sge, - (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? - DMA_TO_DEVICE : DMA_FROM_DEVICE); - wr->sge = NULL; + isert_unmap_data_buf(isert_conn, &wr->data); } if (wr->send_wr) { @@ -1424,7 +1554,6 @@ static void isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) { struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; - struct ib_device *ib_dev = isert_conn->conn_cm_id->device; LIST_HEAD(unmap_list); pr_debug("unreg_fastreg_cmd: %p\n", isert_cmd); @@ -1432,18 +1561,19 @@ isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) if (wr->fr_desc) { pr_debug("unreg_fastreg_cmd: %p free fr_desc %p\n", isert_cmd, wr->fr_desc); + if (wr->fr_desc->ind & ISERT_PROTECTED) { + isert_unmap_data_buf(isert_conn, &wr->prot); + wr->fr_desc->ind &= ~ISERT_PROTECTED; + } spin_lock_bh(&isert_conn->conn_lock); list_add_tail(&wr->fr_desc->list, &isert_conn->conn_fr_pool); spin_unlock_bh(&isert_conn->conn_lock); wr->fr_desc = NULL; } - if (wr->sge) { + if (wr->data.sg) { pr_debug("unreg_fastreg_cmd: %p unmap_sg op\n", isert_cmd); - ib_dma_unmap_sg(ib_dev, wr->sge, wr->num_sge, - (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? - DMA_TO_DEVICE : DMA_FROM_DEVICE); - wr->sge = NULL; + isert_unmap_data_buf(isert_conn, &wr->data); } wr->ib_sge = NULL; @@ -1451,7 +1581,7 @@ isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) } static void -isert_put_cmd(struct isert_cmd *isert_cmd) +isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) { struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; struct isert_conn *isert_conn = isert_cmd->conn; @@ -1467,8 +1597,21 @@ isert_put_cmd(struct isert_cmd *isert_cmd) list_del_init(&cmd->i_conn_node); spin_unlock_bh(&conn->cmd_lock); - if (cmd->data_direction == DMA_TO_DEVICE) + if (cmd->data_direction == DMA_TO_DEVICE) { iscsit_stop_dataout_timer(cmd); + /* + * Check for special case during comp_err where + * WRITE_PENDING has been handed off from core, + * but requires an extra target_put_sess_cmd() + * before transport_generic_free_cmd() below. + */ + if (comp_err && + cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { + struct se_cmd *se_cmd = &cmd->se_cmd; + + target_put_sess_cmd(se_cmd->se_sess, se_cmd); + } + } device->unreg_rdma_mem(isert_cmd, isert_conn); transport_generic_free_cmd(&cmd->se_cmd, 0); @@ -1523,7 +1666,7 @@ isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) static void isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, - struct ib_device *ib_dev) + struct ib_device *ib_dev, bool comp_err) { if (isert_cmd->pdu_buf_dma != 0) { pr_debug("Calling ib_dma_unmap_single for isert_cmd->pdu_buf_dma\n"); @@ -1533,7 +1676,77 @@ isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, } isert_unmap_tx_desc(tx_desc, ib_dev); - isert_put_cmd(isert_cmd); + isert_put_cmd(isert_cmd, comp_err); +} + +static int +isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) +{ + struct ib_mr_status mr_status; + int ret; + + ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); + if (ret) { + pr_err("ib_check_mr_status failed, ret %d\n", ret); + goto fail_mr_status; + } + + if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { + u64 sec_offset_err; + u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; + + switch (mr_status.sig_err.err_type) { + case IB_SIG_BAD_GUARD: + se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; + break; + case IB_SIG_BAD_REFTAG: + se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; + break; + case IB_SIG_BAD_APPTAG: + se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; + break; + } + sec_offset_err = mr_status.sig_err.sig_err_offset; + do_div(sec_offset_err, block_size); + se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; + + pr_err("isert: PI error found type %d at sector 0x%llx " + "expected 0x%x vs actual 0x%x\n", + mr_status.sig_err.err_type, + (unsigned long long)se_cmd->bad_sector, + mr_status.sig_err.expected, + mr_status.sig_err.actual); + ret = 1; + } + +fail_mr_status: + return ret; +} + +static void +isert_completion_rdma_write(struct iser_tx_desc *tx_desc, + struct isert_cmd *isert_cmd) +{ + struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; + struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; + struct se_cmd *se_cmd = &cmd->se_cmd; + struct isert_conn *isert_conn = isert_cmd->conn; + struct isert_device *device = isert_conn->conn_device; + int ret = 0; + + if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { + ret = isert_check_pi_status(se_cmd, + wr->fr_desc->pi_ctx->sig_mr); + wr->fr_desc->ind &= ~ISERT_PROTECTED; + } + + device->unreg_rdma_mem(isert_cmd, isert_conn); + wr->send_wr_num = 0; + if (ret) + transport_send_check_condition_and_sense(se_cmd, + se_cmd->pi_err, 0); + else + isert_put_response(isert_conn->conn, cmd); } static void @@ -1545,10 +1758,17 @@ isert_completion_rdma_read(struct iser_tx_desc *tx_desc, struct se_cmd *se_cmd = &cmd->se_cmd; struct isert_conn *isert_conn = isert_cmd->conn; struct isert_device *device = isert_conn->conn_device; + int ret = 0; + + if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { + ret = isert_check_pi_status(se_cmd, + wr->fr_desc->pi_ctx->sig_mr); + wr->fr_desc->ind &= ~ISERT_PROTECTED; + } iscsit_stop_dataout_timer(cmd); device->unreg_rdma_mem(isert_cmd, isert_conn); - cmd->write_data_done = wr->cur_rdma_length; + cmd->write_data_done = wr->data.len; wr->send_wr_num = 0; pr_debug("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); @@ -1557,7 +1777,11 @@ isert_completion_rdma_read(struct iser_tx_desc *tx_desc, cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; spin_unlock_bh(&cmd->istate_lock); - target_execute_cmd(se_cmd); + if (ret) + transport_send_check_condition_and_sense(se_cmd, + se_cmd->pi_err, 0); + else + target_execute_cmd(se_cmd); } static void @@ -1577,14 +1801,14 @@ isert_do_control_comp(struct work_struct *work) iscsit_tmr_post_handler(cmd, cmd->conn); cmd->i_state = ISTATE_SENT_STATUS; - isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); + isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false); break; case ISTATE_SEND_REJECT: pr_debug("Got isert_do_control_comp ISTATE_SEND_REJECT: >>>\n"); atomic_dec(&isert_conn->post_send_buf_count); cmd->i_state = ISTATE_SENT_STATUS; - isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); + isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false); break; case ISTATE_SEND_LOGOUTRSP: pr_debug("Calling iscsit_logout_post_handler >>>>>>>>>>>>>>\n"); @@ -1598,7 +1822,7 @@ isert_do_control_comp(struct work_struct *work) case ISTATE_SEND_TEXTRSP: atomic_dec(&isert_conn->post_send_buf_count); cmd->i_state = ISTATE_SENT_STATUS; - isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); + isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false); break; default: pr_err("Unknown do_control_comp i_state %d\n", cmd->i_state); @@ -1626,10 +1850,21 @@ isert_response_completion(struct iser_tx_desc *tx_desc, queue_work(isert_comp_wq, &isert_cmd->comp_work); return; } - atomic_sub(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); + + /** + * If send_wr_num is 0 this means that we got + * RDMA completion and we cleared it and we should + * simply decrement the response post. else the + * response is incorporated in send_wr_num, just + * sub it. + **/ + if (wr->send_wr_num) + atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); + else + atomic_dec(&isert_conn->post_send_buf_count); cmd->i_state = ISTATE_SENT_STATUS; - isert_completion_put(tx_desc, isert_cmd, ib_dev); + isert_completion_put(tx_desc, isert_cmd, ib_dev, false); } static void @@ -1658,8 +1893,9 @@ __isert_send_completion(struct iser_tx_desc *tx_desc, isert_conn, ib_dev); break; case ISER_IB_RDMA_WRITE: - pr_err("isert_send_completion: Got ISER_IB_RDMA_WRITE\n"); - dump_stack(); + pr_debug("isert_send_completion: Got ISER_IB_RDMA_WRITE\n"); + atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); + isert_completion_rdma_write(tx_desc, isert_cmd); break; case ISER_IB_RDMA_READ: pr_debug("isert_send_completion: Got ISER_IB_RDMA_READ:\n"); @@ -1709,8 +1945,20 @@ isert_cq_drain_comp_llist(struct isert_conn *isert_conn, struct ib_device *ib_de llnode = llist_next(llnode); wr = &t->isert_cmd->rdma_wr; - atomic_sub(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); - isert_completion_put(t, t->isert_cmd, ib_dev); + /** + * If send_wr_num is 0 this means that we got + * RDMA completion and we cleared it and we should + * simply decrement the response post. else the + * response is incorporated in send_wr_num, just + * sub it. + **/ + if (wr->send_wr_num) + atomic_sub(wr->send_wr_num, + &isert_conn->post_send_buf_count); + else + atomic_dec(&isert_conn->post_send_buf_count); + + isert_completion_put(t, t->isert_cmd, ib_dev, true); } } @@ -1728,15 +1976,27 @@ isert_cq_tx_comp_err(struct iser_tx_desc *tx_desc, struct isert_conn *isert_conn llnode = llist_next(llnode); wr = &t->isert_cmd->rdma_wr; - atomic_sub(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); - isert_completion_put(t, t->isert_cmd, ib_dev); + /** + * If send_wr_num is 0 this means that we got + * RDMA completion and we cleared it and we should + * simply decrement the response post. else the + * response is incorporated in send_wr_num, just + * sub it. + **/ + if (wr->send_wr_num) + atomic_sub(wr->send_wr_num, + &isert_conn->post_send_buf_count); + else + atomic_dec(&isert_conn->post_send_buf_count); + + isert_completion_put(t, t->isert_cmd, ib_dev, true); } tx_desc->comp_llnode_batch = NULL; if (!isert_cmd) isert_unmap_tx_desc(tx_desc, ib_dev); else - isert_completion_put(tx_desc, isert_cmd, ib_dev); + isert_completion_put(tx_desc, isert_cmd, ib_dev, true); } static void @@ -1918,6 +2178,36 @@ isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) return isert_post_response(isert_conn, isert_cmd); } +static void +isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) +{ + struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); + struct isert_conn *isert_conn = (struct isert_conn *)conn->context; + struct isert_device *device = isert_conn->conn_device; + + spin_lock_bh(&conn->cmd_lock); + if (!list_empty(&cmd->i_conn_node)) + list_del_init(&cmd->i_conn_node); + spin_unlock_bh(&conn->cmd_lock); + + if (cmd->data_direction == DMA_TO_DEVICE) + iscsit_stop_dataout_timer(cmd); + + device->unreg_rdma_mem(isert_cmd, isert_conn); +} + +static enum target_prot_op +isert_get_sup_prot_ops(struct iscsi_conn *conn) +{ + struct isert_conn *isert_conn = (struct isert_conn *)conn->context; + struct isert_device *device = isert_conn->conn_device; + + if (device->pi_capable) + return TARGET_PROT_ALL; + + return TARGET_PROT_NORMAL; +} + static int isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, bool nopout_response) @@ -2099,54 +2389,39 @@ isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, struct se_cmd *se_cmd = &cmd->se_cmd; struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); struct isert_conn *isert_conn = (struct isert_conn *)conn->context; - struct ib_device *ib_dev = isert_conn->conn_cm_id->device; + struct isert_data_buf *data = &wr->data; struct ib_send_wr *send_wr; struct ib_sge *ib_sge; - struct scatterlist *sg_start; - u32 sg_off = 0, sg_nents; - u32 offset = 0, data_len, data_left, rdma_write_max, va_offset = 0; - int ret = 0, count, i, ib_sge_cnt; + u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; + int ret = 0, i, ib_sge_cnt; - if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { - data_left = se_cmd->data_length; - } else { - sg_off = cmd->write_data_done / PAGE_SIZE; - data_left = se_cmd->data_length - cmd->write_data_done; - offset = cmd->write_data_done; - isert_cmd->tx_desc.isert_cmd = isert_cmd; - } + isert_cmd->tx_desc.isert_cmd = isert_cmd; - sg_start = &cmd->se_cmd.t_data_sg[sg_off]; - sg_nents = se_cmd->t_data_nents - sg_off; + offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; + ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, + se_cmd->t_data_nents, se_cmd->data_length, + offset, wr->iser_ib_op, &wr->data); + if (ret) + return ret; - count = ib_dma_map_sg(ib_dev, sg_start, sg_nents, - (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? - DMA_TO_DEVICE : DMA_FROM_DEVICE); - if (unlikely(!count)) { - pr_err("Cmd: %p unrable to map SGs\n", isert_cmd); - return -EINVAL; - } - wr->sge = sg_start; - wr->num_sge = sg_nents; - wr->cur_rdma_length = data_left; - pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", - isert_cmd, count, sg_start, sg_nents, data_left); + data_left = data->len; + offset = data->offset; - ib_sge = kzalloc(sizeof(struct ib_sge) * sg_nents, GFP_KERNEL); + ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); if (!ib_sge) { pr_warn("Unable to allocate ib_sge\n"); ret = -ENOMEM; - goto unmap_sg; + goto unmap_cmd; } wr->ib_sge = ib_sge; - wr->send_wr_num = DIV_ROUND_UP(sg_nents, isert_conn->max_sge); + wr->send_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num, GFP_KERNEL); if (!wr->send_wr) { pr_debug("Unable to allocate wr->send_wr\n"); ret = -ENOMEM; - goto unmap_sg; + goto unmap_cmd; } wr->isert_cmd = isert_cmd; @@ -2185,10 +2460,9 @@ isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, } return 0; -unmap_sg: - ib_dma_unmap_sg(ib_dev, sg_start, sg_nents, - (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? - DMA_TO_DEVICE : DMA_FROM_DEVICE); +unmap_cmd: + isert_unmap_data_buf(isert_conn, data); + return ret; } @@ -2232,49 +2506,70 @@ isert_map_fr_pagelist(struct ib_device *ib_dev, } static int -isert_fast_reg_mr(struct fast_reg_descriptor *fr_desc, - struct isert_conn *isert_conn, struct scatterlist *sg_start, - struct ib_sge *ib_sge, u32 sg_nents, u32 offset, - unsigned int data_len) +isert_fast_reg_mr(struct isert_conn *isert_conn, + struct fast_reg_descriptor *fr_desc, + struct isert_data_buf *mem, + enum isert_indicator ind, + struct ib_sge *sge) { struct ib_device *ib_dev = isert_conn->conn_cm_id->device; + struct ib_mr *mr; + struct ib_fast_reg_page_list *frpl; struct ib_send_wr fr_wr, inv_wr; struct ib_send_wr *bad_wr, *wr = NULL; int ret, pagelist_len; u32 page_off; u8 key; - sg_nents = min_t(unsigned int, sg_nents, ISCSI_ISER_SG_TABLESIZE); - page_off = offset % PAGE_SIZE; + if (mem->dma_nents == 1) { + sge->lkey = isert_conn->conn_mr->lkey; + sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); + sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); + pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n", + __func__, __LINE__, sge->addr, sge->length, + sge->lkey); + return 0; + } + + if (ind == ISERT_DATA_KEY_VALID) { + /* Registering data buffer */ + mr = fr_desc->data_mr; + frpl = fr_desc->data_frpl; + } else { + /* Registering protection buffer */ + mr = fr_desc->pi_ctx->prot_mr; + frpl = fr_desc->pi_ctx->prot_frpl; + } + + page_off = mem->offset % PAGE_SIZE; pr_debug("Use fr_desc %p sg_nents %d offset %u\n", - fr_desc, sg_nents, offset); + fr_desc, mem->nents, mem->offset); - pagelist_len = isert_map_fr_pagelist(ib_dev, sg_start, sg_nents, - &fr_desc->data_frpl->page_list[0]); + pagelist_len = isert_map_fr_pagelist(ib_dev, mem->sg, mem->nents, + &frpl->page_list[0]); - if (!fr_desc->valid) { + if (!(fr_desc->ind & ISERT_DATA_KEY_VALID)) { memset(&inv_wr, 0, sizeof(inv_wr)); inv_wr.wr_id = ISER_FASTREG_LI_WRID; inv_wr.opcode = IB_WR_LOCAL_INV; - inv_wr.ex.invalidate_rkey = fr_desc->data_mr->rkey; + inv_wr.ex.invalidate_rkey = mr->rkey; wr = &inv_wr; /* Bump the key */ - key = (u8)(fr_desc->data_mr->rkey & 0x000000FF); - ib_update_fast_reg_key(fr_desc->data_mr, ++key); + key = (u8)(mr->rkey & 0x000000FF); + ib_update_fast_reg_key(mr, ++key); } /* Prepare FASTREG WR */ memset(&fr_wr, 0, sizeof(fr_wr)); fr_wr.wr_id = ISER_FASTREG_LI_WRID; fr_wr.opcode = IB_WR_FAST_REG_MR; - fr_wr.wr.fast_reg.iova_start = - fr_desc->data_frpl->page_list[0] + page_off; - fr_wr.wr.fast_reg.page_list = fr_desc->data_frpl; + fr_wr.wr.fast_reg.iova_start = frpl->page_list[0] + page_off; + fr_wr.wr.fast_reg.page_list = frpl; fr_wr.wr.fast_reg.page_list_len = pagelist_len; fr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; - fr_wr.wr.fast_reg.length = data_len; - fr_wr.wr.fast_reg.rkey = fr_desc->data_mr->rkey; + fr_wr.wr.fast_reg.length = mem->len; + fr_wr.wr.fast_reg.rkey = mr->rkey; fr_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE; if (!wr) @@ -2287,15 +2582,157 @@ isert_fast_reg_mr(struct fast_reg_descriptor *fr_desc, pr_err("fast registration failed, ret:%d\n", ret); return ret; } - fr_desc->valid = false; + fr_desc->ind &= ~ind; + + sge->lkey = mr->lkey; + sge->addr = frpl->page_list[0] + page_off; + sge->length = mem->len; + + pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n", + __func__, __LINE__, sge->addr, sge->length, + sge->lkey); + + return ret; +} + +static inline enum ib_t10_dif_type +se2ib_prot_type(enum target_prot_type prot_type) +{ + switch (prot_type) { + case TARGET_DIF_TYPE0_PROT: + return IB_T10DIF_NONE; + case TARGET_DIF_TYPE1_PROT: + return IB_T10DIF_TYPE1; + case TARGET_DIF_TYPE2_PROT: + return IB_T10DIF_TYPE2; + case TARGET_DIF_TYPE3_PROT: + return IB_T10DIF_TYPE3; + default: + return IB_T10DIF_NONE; + } +} - ib_sge->lkey = fr_desc->data_mr->lkey; - ib_sge->addr = fr_desc->data_frpl->page_list[0] + page_off; - ib_sge->length = data_len; +static int +isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) +{ + enum ib_t10_dif_type ib_prot_type = se2ib_prot_type(se_cmd->prot_type); + + sig_attrs->mem.sig_type = IB_SIG_TYPE_T10_DIF; + sig_attrs->wire.sig_type = IB_SIG_TYPE_T10_DIF; + sig_attrs->mem.sig.dif.pi_interval = + se_cmd->se_dev->dev_attrib.block_size; + sig_attrs->wire.sig.dif.pi_interval = + se_cmd->se_dev->dev_attrib.block_size; + + switch (se_cmd->prot_op) { + case TARGET_PROT_DIN_INSERT: + case TARGET_PROT_DOUT_STRIP: + sig_attrs->mem.sig.dif.type = IB_T10DIF_NONE; + sig_attrs->wire.sig.dif.type = ib_prot_type; + sig_attrs->wire.sig.dif.bg_type = IB_T10DIF_CRC; + sig_attrs->wire.sig.dif.ref_tag = se_cmd->reftag_seed; + break; + case TARGET_PROT_DOUT_INSERT: + case TARGET_PROT_DIN_STRIP: + sig_attrs->mem.sig.dif.type = ib_prot_type; + sig_attrs->mem.sig.dif.bg_type = IB_T10DIF_CRC; + sig_attrs->mem.sig.dif.ref_tag = se_cmd->reftag_seed; + sig_attrs->wire.sig.dif.type = IB_T10DIF_NONE; + break; + case TARGET_PROT_DIN_PASS: + case TARGET_PROT_DOUT_PASS: + sig_attrs->mem.sig.dif.type = ib_prot_type; + sig_attrs->mem.sig.dif.bg_type = IB_T10DIF_CRC; + sig_attrs->mem.sig.dif.ref_tag = se_cmd->reftag_seed; + sig_attrs->wire.sig.dif.type = ib_prot_type; + sig_attrs->wire.sig.dif.bg_type = IB_T10DIF_CRC; + sig_attrs->wire.sig.dif.ref_tag = se_cmd->reftag_seed; + break; + default: + pr_err("Unsupported PI operation %d\n", se_cmd->prot_op); + return -EINVAL; + } - pr_debug("RDMA ib_sge: addr: 0x%16llx length: %u lkey: %08x\n", - ib_sge->addr, ib_sge->length, ib_sge->lkey); + return 0; +} + +static inline u8 +isert_set_prot_checks(u8 prot_checks) +{ + return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | + (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | + (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); +} + +static int +isert_reg_sig_mr(struct isert_conn *isert_conn, struct se_cmd *se_cmd, + struct fast_reg_descriptor *fr_desc, + struct ib_sge *data_sge, struct ib_sge *prot_sge, + struct ib_sge *sig_sge) +{ + struct ib_send_wr sig_wr, inv_wr; + struct ib_send_wr *bad_wr, *wr = NULL; + struct pi_context *pi_ctx = fr_desc->pi_ctx; + struct ib_sig_attrs sig_attrs; + int ret; + u32 key; + + memset(&sig_attrs, 0, sizeof(sig_attrs)); + ret = isert_set_sig_attrs(se_cmd, &sig_attrs); + if (ret) + goto err; + + sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); + + if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { + memset(&inv_wr, 0, sizeof(inv_wr)); + inv_wr.opcode = IB_WR_LOCAL_INV; + inv_wr.wr_id = ISER_FASTREG_LI_WRID; + inv_wr.ex.invalidate_rkey = pi_ctx->sig_mr->rkey; + wr = &inv_wr; + /* Bump the key */ + key = (u8)(pi_ctx->sig_mr->rkey & 0x000000FF); + ib_update_fast_reg_key(pi_ctx->sig_mr, ++key); + } + + memset(&sig_wr, 0, sizeof(sig_wr)); + sig_wr.opcode = IB_WR_REG_SIG_MR; + sig_wr.wr_id = ISER_FASTREG_LI_WRID; + sig_wr.sg_list = data_sge; + sig_wr.num_sge = 1; + sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE; + sig_wr.wr.sig_handover.sig_attrs = &sig_attrs; + sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr; + if (se_cmd->t_prot_sg) + sig_wr.wr.sig_handover.prot = prot_sge; + + if (!wr) + wr = &sig_wr; + else + wr->next = &sig_wr; + + ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr); + if (ret) { + pr_err("fast registration failed, ret:%d\n", ret); + goto err; + } + fr_desc->ind &= ~ISERT_SIG_KEY_VALID; + + sig_sge->lkey = pi_ctx->sig_mr->lkey; + sig_sge->addr = 0; + sig_sge->length = se_cmd->data_length; + if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && + se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) + /* + * We have protection guards on the wire + * so we need to set a larget transfer + */ + sig_sge->length += se_cmd->prot_length; + pr_debug("sig_sge: addr: 0x%llx length: %u lkey: %x\n", + sig_sge->addr, sig_sge->length, + sig_sge->lkey); +err: return ret; } @@ -2305,62 +2742,82 @@ isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, { struct se_cmd *se_cmd = &cmd->se_cmd; struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); - struct isert_conn *isert_conn = (struct isert_conn *)conn->context; - struct ib_device *ib_dev = isert_conn->conn_cm_id->device; + struct isert_conn *isert_conn = conn->context; + struct ib_sge data_sge; struct ib_send_wr *send_wr; - struct ib_sge *ib_sge; - struct scatterlist *sg_start; - struct fast_reg_descriptor *fr_desc; - u32 sg_off = 0, sg_nents; - u32 offset = 0, data_len, data_left, rdma_write_max; - int ret = 0, count; + struct fast_reg_descriptor *fr_desc = NULL; + u32 offset; + int ret = 0; unsigned long flags; - if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { - data_left = se_cmd->data_length; - } else { - offset = cmd->write_data_done; - sg_off = offset / PAGE_SIZE; - data_left = se_cmd->data_length - cmd->write_data_done; - isert_cmd->tx_desc.isert_cmd = isert_cmd; - } + isert_cmd->tx_desc.isert_cmd = isert_cmd; - sg_start = &cmd->se_cmd.t_data_sg[sg_off]; - sg_nents = se_cmd->t_data_nents - sg_off; + offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; + ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, + se_cmd->t_data_nents, se_cmd->data_length, + offset, wr->iser_ib_op, &wr->data); + if (ret) + return ret; - count = ib_dma_map_sg(ib_dev, sg_start, sg_nents, - (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? - DMA_TO_DEVICE : DMA_FROM_DEVICE); - if (unlikely(!count)) { - pr_err("Cmd: %p unrable to map SGs\n", isert_cmd); - return -EINVAL; + if (wr->data.dma_nents != 1 || + se_cmd->prot_op != TARGET_PROT_NORMAL) { + spin_lock_irqsave(&isert_conn->conn_lock, flags); + fr_desc = list_first_entry(&isert_conn->conn_fr_pool, + struct fast_reg_descriptor, list); + list_del(&fr_desc->list); + spin_unlock_irqrestore(&isert_conn->conn_lock, flags); + wr->fr_desc = fr_desc; } - wr->sge = sg_start; - wr->num_sge = sg_nents; - pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", - isert_cmd, count, sg_start, sg_nents, data_left); - memset(&wr->s_ib_sge, 0, sizeof(*ib_sge)); - ib_sge = &wr->s_ib_sge; - wr->ib_sge = ib_sge; + ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, + ISERT_DATA_KEY_VALID, &data_sge); + if (ret) + goto unmap_cmd; + + if (se_cmd->prot_op != TARGET_PROT_NORMAL) { + struct ib_sge prot_sge, sig_sge; + + if (se_cmd->t_prot_sg) { + ret = isert_map_data_buf(isert_conn, isert_cmd, + se_cmd->t_prot_sg, + se_cmd->t_prot_nents, + se_cmd->prot_length, + 0, wr->iser_ib_op, &wr->prot); + if (ret) + goto unmap_cmd; + + ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->prot, + ISERT_PROT_KEY_VALID, &prot_sge); + if (ret) + goto unmap_prot_cmd; + } + + ret = isert_reg_sig_mr(isert_conn, se_cmd, fr_desc, + &data_sge, &prot_sge, &sig_sge); + if (ret) + goto unmap_prot_cmd; + fr_desc->ind |= ISERT_PROTECTED; + memcpy(&wr->s_ib_sge, &sig_sge, sizeof(sig_sge)); + } else + memcpy(&wr->s_ib_sge, &data_sge, sizeof(data_sge)); + + wr->ib_sge = &wr->s_ib_sge; wr->send_wr_num = 1; memset(&wr->s_send_wr, 0, sizeof(*send_wr)); wr->send_wr = &wr->s_send_wr; - wr->isert_cmd = isert_cmd; - rdma_write_max = ISCSI_ISER_SG_TABLESIZE * PAGE_SIZE; send_wr = &isert_cmd->rdma_wr.s_send_wr; - send_wr->sg_list = ib_sge; + send_wr->sg_list = &wr->s_ib_sge; send_wr->num_sge = 1; send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc; if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { send_wr->opcode = IB_WR_RDMA_WRITE; send_wr->wr.rdma.remote_addr = isert_cmd->read_va; send_wr->wr.rdma.rkey = isert_cmd->read_stag; - send_wr->send_flags = 0; - send_wr->next = &isert_cmd->tx_desc.send_wr; + send_wr->send_flags = se_cmd->prot_op == TARGET_PROT_NORMAL ? + 0 : IB_SEND_SIGNALED; } else { send_wr->opcode = IB_WR_RDMA_READ; send_wr->wr.rdma.remote_addr = isert_cmd->write_va; @@ -2368,37 +2825,18 @@ isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, send_wr->send_flags = IB_SEND_SIGNALED; } - data_len = min(data_left, rdma_write_max); - wr->cur_rdma_length = data_len; - - /* if there is a single dma entry, dma mr is sufficient */ - if (count == 1) { - ib_sge->addr = ib_sg_dma_address(ib_dev, &sg_start[0]); - ib_sge->length = ib_sg_dma_len(ib_dev, &sg_start[0]); - ib_sge->lkey = isert_conn->conn_mr->lkey; - wr->fr_desc = NULL; - } else { + return 0; +unmap_prot_cmd: + if (se_cmd->t_prot_sg) + isert_unmap_data_buf(isert_conn, &wr->prot); +unmap_cmd: + if (fr_desc) { spin_lock_irqsave(&isert_conn->conn_lock, flags); - fr_desc = list_first_entry(&isert_conn->conn_fr_pool, - struct fast_reg_descriptor, list); - list_del(&fr_desc->list); + list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); spin_unlock_irqrestore(&isert_conn->conn_lock, flags); - wr->fr_desc = fr_desc; - - ret = isert_fast_reg_mr(fr_desc, isert_conn, sg_start, - ib_sge, sg_nents, offset, data_len); - if (ret) { - list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); - goto unmap_sg; - } } + isert_unmap_data_buf(isert_conn, &wr->data); - return 0; - -unmap_sg: - ib_dma_unmap_sg(ib_dev, sg_start, sg_nents, - (wr->iser_ib_op == ISER_IB_RDMA_WRITE) ? - DMA_TO_DEVICE : DMA_FROM_DEVICE); return ret; } @@ -2422,25 +2860,35 @@ isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) return rc; } - /* - * Build isert_conn->tx_desc for iSCSI response PDU and attach - */ - isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); - iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) - &isert_cmd->tx_desc.iscsi_header); - isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); - isert_init_send_wr(isert_conn, isert_cmd, - &isert_cmd->tx_desc.send_wr, true); + if (se_cmd->prot_op == TARGET_PROT_NORMAL) { + /* + * Build isert_conn->tx_desc for iSCSI response PDU and attach + */ + isert_create_send_desc(isert_conn, isert_cmd, + &isert_cmd->tx_desc); + iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) + &isert_cmd->tx_desc.iscsi_header); + isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); + isert_init_send_wr(isert_conn, isert_cmd, + &isert_cmd->tx_desc.send_wr, true); + isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr; + wr->send_wr_num += 1; + } - atomic_add(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); + atomic_add(wr->send_wr_num, &isert_conn->post_send_buf_count); rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); if (rc) { pr_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); - atomic_sub(wr->send_wr_num + 1, &isert_conn->post_send_buf_count); + atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); } - pr_debug("Cmd: %p posted RDMA_WRITE + Response for iSER Data READ\n", - isert_cmd); + + if (se_cmd->prot_op == TARGET_PROT_NORMAL) + pr_debug("Cmd: %p posted RDMA_WRITE + Response for iSER Data " + "READ\n", isert_cmd); + else + pr_debug("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", + isert_cmd); return 1; } @@ -2815,6 +3263,8 @@ static struct iscsit_transport iser_target_transport = { .iscsit_get_dataout = isert_get_dataout, .iscsit_queue_data_in = isert_put_datain, .iscsit_queue_status = isert_put_response, + .iscsit_aborted_task = isert_aborted_task, + .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, }; static int __init isert_init(void) |