1b8d26b3bSNicholas Bellinger /******************************************************************************* 2b8d26b3bSNicholas Bellinger * This file contains iSCSI extentions for RDMA (iSER) Verbs 3b8d26b3bSNicholas Bellinger * 44c76251eSNicholas Bellinger * (c) Copyright 2013 Datera, Inc. 5b8d26b3bSNicholas Bellinger * 6b8d26b3bSNicholas Bellinger * Nicholas A. Bellinger <nab@linux-iscsi.org> 7b8d26b3bSNicholas Bellinger * 8b8d26b3bSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 9b8d26b3bSNicholas Bellinger * it under the terms of the GNU General Public License as published by 10b8d26b3bSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 11b8d26b3bSNicholas Bellinger * (at your option) any later version. 12b8d26b3bSNicholas Bellinger * 13b8d26b3bSNicholas Bellinger * This program is distributed in the hope that it will be useful, 14b8d26b3bSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 15b8d26b3bSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16b8d26b3bSNicholas Bellinger * GNU General Public License for more details. 17b8d26b3bSNicholas Bellinger ****************************************************************************/ 18b8d26b3bSNicholas Bellinger 19b8d26b3bSNicholas Bellinger #include <linux/string.h> 20b8d26b3bSNicholas Bellinger #include <linux/module.h> 21b8d26b3bSNicholas Bellinger #include <linux/scatterlist.h> 22b8d26b3bSNicholas Bellinger #include <linux/socket.h> 23b8d26b3bSNicholas Bellinger #include <linux/in.h> 24b8d26b3bSNicholas Bellinger #include <linux/in6.h> 25b8d26b3bSNicholas Bellinger #include <rdma/ib_verbs.h> 26b8d26b3bSNicholas Bellinger #include <rdma/rdma_cm.h> 27b8d26b3bSNicholas Bellinger #include <target/target_core_base.h> 28b8d26b3bSNicholas Bellinger #include <target/target_core_fabric.h> 29b8d26b3bSNicholas Bellinger #include <target/iscsi/iscsi_transport.h> 30531b7bf4SSagi Grimberg #include <linux/semaphore.h> 31b8d26b3bSNicholas Bellinger 32b8d26b3bSNicholas Bellinger #include "isert_proto.h" 33b8d26b3bSNicholas Bellinger #include "ib_isert.h" 34b8d26b3bSNicholas Bellinger 35b8d26b3bSNicholas Bellinger #define ISERT_MAX_CONN 8 36b8d26b3bSNicholas Bellinger #define ISER_MAX_RX_CQ_LEN (ISERT_QP_MAX_RECV_DTOS * ISERT_MAX_CONN) 37b8d26b3bSNicholas Bellinger #define ISER_MAX_TX_CQ_LEN (ISERT_QP_MAX_REQ_DTOS * ISERT_MAX_CONN) 38*bdf20e72SSagi Grimberg #define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \ 39*bdf20e72SSagi Grimberg ISERT_MAX_CONN) 40b8d26b3bSNicholas Bellinger 41b8d26b3bSNicholas Bellinger static DEFINE_MUTEX(device_list_mutex); 42b8d26b3bSNicholas Bellinger static LIST_HEAD(device_list); 43b8d26b3bSNicholas Bellinger static struct workqueue_struct *isert_comp_wq; 44b02efbfcSSagi Grimberg static struct workqueue_struct *isert_release_wq; 45b8d26b3bSNicholas Bellinger 46b8d26b3bSNicholas Bellinger static void 47d40945d8SVu Pham isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); 48d40945d8SVu Pham static int 49d40945d8SVu Pham isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 50d40945d8SVu Pham struct isert_rdma_wr *wr); 5159464ef4SVu Pham static void 52a3a5a826SSagi Grimberg isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); 5359464ef4SVu Pham static int 54a3a5a826SSagi Grimberg isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 5559464ef4SVu Pham struct isert_rdma_wr *wr); 56f93f3a70SSagi Grimberg static int 57f93f3a70SSagi Grimberg isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); 582371e5daSSagi Grimberg static int 592371e5daSSagi Grimberg isert_rdma_post_recvl(struct isert_conn *isert_conn); 602371e5daSSagi Grimberg static int 612371e5daSSagi Grimberg isert_rdma_accept(struct isert_conn *isert_conn); 62ca6c1d82SSagi Grimberg struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); 63d40945d8SVu Pham 64302cc7c3SSagi Grimberg static inline bool 65302cc7c3SSagi Grimberg isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) 66302cc7c3SSagi Grimberg { 6723a548eeSSagi Grimberg return (conn->pi_support && 68302cc7c3SSagi Grimberg cmd->prot_op != TARGET_PROT_NORMAL); 69302cc7c3SSagi Grimberg } 70302cc7c3SSagi Grimberg 71302cc7c3SSagi Grimberg 72d40945d8SVu Pham static void 73b8d26b3bSNicholas Bellinger isert_qp_event_callback(struct ib_event *e, void *context) 74b8d26b3bSNicholas Bellinger { 75b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)context; 76b8d26b3bSNicholas Bellinger 77b8d26b3bSNicholas Bellinger pr_err("isert_qp_event_callback event: %d\n", e->event); 78b8d26b3bSNicholas Bellinger switch (e->event) { 79b8d26b3bSNicholas Bellinger case IB_EVENT_COMM_EST: 80b8d26b3bSNicholas Bellinger rdma_notify(isert_conn->conn_cm_id, IB_EVENT_COMM_EST); 81b8d26b3bSNicholas Bellinger break; 82b8d26b3bSNicholas Bellinger case IB_EVENT_QP_LAST_WQE_REACHED: 83b8d26b3bSNicholas Bellinger pr_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED:\n"); 84b8d26b3bSNicholas Bellinger break; 85b8d26b3bSNicholas Bellinger default: 86b8d26b3bSNicholas Bellinger break; 87b8d26b3bSNicholas Bellinger } 88b8d26b3bSNicholas Bellinger } 89b8d26b3bSNicholas Bellinger 90b8d26b3bSNicholas Bellinger static int 91b8d26b3bSNicholas Bellinger isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) 92b8d26b3bSNicholas Bellinger { 93b8d26b3bSNicholas Bellinger int ret; 94b8d26b3bSNicholas Bellinger 95b8d26b3bSNicholas Bellinger ret = ib_query_device(ib_dev, devattr); 96b8d26b3bSNicholas Bellinger if (ret) { 97b8d26b3bSNicholas Bellinger pr_err("ib_query_device() failed: %d\n", ret); 98b8d26b3bSNicholas Bellinger return ret; 99b8d26b3bSNicholas Bellinger } 100b8d26b3bSNicholas Bellinger pr_debug("devattr->max_sge: %d\n", devattr->max_sge); 101b8d26b3bSNicholas Bellinger pr_debug("devattr->max_sge_rd: %d\n", devattr->max_sge_rd); 102b8d26b3bSNicholas Bellinger 103b8d26b3bSNicholas Bellinger return 0; 104b8d26b3bSNicholas Bellinger } 105b8d26b3bSNicholas Bellinger 106b8d26b3bSNicholas Bellinger static int 107570db170SSagi Grimberg isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) 108b8d26b3bSNicholas Bellinger { 109b8d26b3bSNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 110b8d26b3bSNicholas Bellinger struct ib_qp_init_attr attr; 1114a295baeSSagi Grimberg struct isert_comp *comp; 1124a295baeSSagi Grimberg int ret, i, min = 0; 113b8d26b3bSNicholas Bellinger 114b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 1154a295baeSSagi Grimberg for (i = 0; i < device->comps_used; i++) 1164a295baeSSagi Grimberg if (device->comps[i].active_qps < 1174a295baeSSagi Grimberg device->comps[min].active_qps) 1184a295baeSSagi Grimberg min = i; 1194a295baeSSagi Grimberg comp = &device->comps[min]; 1204a295baeSSagi Grimberg comp->active_qps++; 1214a295baeSSagi Grimberg pr_info("conn %p, using comp %p min_index: %d\n", 1224a295baeSSagi Grimberg isert_conn, comp, min); 123b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 124b8d26b3bSNicholas Bellinger 125b8d26b3bSNicholas Bellinger memset(&attr, 0, sizeof(struct ib_qp_init_attr)); 126b8d26b3bSNicholas Bellinger attr.event_handler = isert_qp_event_callback; 127b8d26b3bSNicholas Bellinger attr.qp_context = isert_conn; 1286f0fae3dSSagi Grimberg attr.send_cq = comp->cq; 1296f0fae3dSSagi Grimberg attr.recv_cq = comp->cq; 130b8d26b3bSNicholas Bellinger attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; 131*bdf20e72SSagi Grimberg attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; 132b8d26b3bSNicholas Bellinger /* 133b8d26b3bSNicholas Bellinger * FIXME: Use devattr.max_sge - 2 for max_send_sge as 134f57915cfSOr Gerlitz * work-around for RDMA_READs with ConnectX-2. 135f57915cfSOr Gerlitz * 136f57915cfSOr Gerlitz * Also, still make sure to have at least two SGEs for 137f57915cfSOr Gerlitz * outgoing control PDU responses. 138b8d26b3bSNicholas Bellinger */ 139f57915cfSOr Gerlitz attr.cap.max_send_sge = max(2, device->dev_attr.max_sge - 2); 140b8d26b3bSNicholas Bellinger isert_conn->max_sge = attr.cap.max_send_sge; 141b8d26b3bSNicholas Bellinger 142b8d26b3bSNicholas Bellinger attr.cap.max_recv_sge = 1; 143b8d26b3bSNicholas Bellinger attr.sq_sig_type = IB_SIGNAL_REQ_WR; 144b8d26b3bSNicholas Bellinger attr.qp_type = IB_QPT_RC; 145570db170SSagi Grimberg if (device->pi_capable) 146d3e125daSSagi Grimberg attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; 147b8d26b3bSNicholas Bellinger 148b8d26b3bSNicholas Bellinger pr_debug("isert_conn_setup_qp cma_id->device: %p\n", 149b8d26b3bSNicholas Bellinger cma_id->device); 150b8d26b3bSNicholas Bellinger pr_debug("isert_conn_setup_qp conn_pd->device: %p\n", 151b8d26b3bSNicholas Bellinger isert_conn->conn_pd->device); 152b8d26b3bSNicholas Bellinger 153b8d26b3bSNicholas Bellinger ret = rdma_create_qp(cma_id, isert_conn->conn_pd, &attr); 154b8d26b3bSNicholas Bellinger if (ret) { 155b8d26b3bSNicholas Bellinger pr_err("rdma_create_qp failed for cma_id %d\n", ret); 15619e2090fSSagi Grimberg goto err; 157b8d26b3bSNicholas Bellinger } 158b8d26b3bSNicholas Bellinger isert_conn->conn_qp = cma_id->qp; 159b8d26b3bSNicholas Bellinger pr_debug("rdma_create_qp() returned success >>>>>>>>>>>>>>>>>>>>>>>>>.\n"); 160b8d26b3bSNicholas Bellinger 161b8d26b3bSNicholas Bellinger return 0; 16219e2090fSSagi Grimberg err: 16319e2090fSSagi Grimberg mutex_lock(&device_list_mutex); 1644a295baeSSagi Grimberg comp->active_qps--; 16519e2090fSSagi Grimberg mutex_unlock(&device_list_mutex); 16619e2090fSSagi Grimberg 16719e2090fSSagi Grimberg return ret; 168b8d26b3bSNicholas Bellinger } 169b8d26b3bSNicholas Bellinger 170b8d26b3bSNicholas Bellinger static void 171b8d26b3bSNicholas Bellinger isert_cq_event_callback(struct ib_event *e, void *context) 172b8d26b3bSNicholas Bellinger { 173b8d26b3bSNicholas Bellinger pr_debug("isert_cq_event_callback event: %d\n", e->event); 174b8d26b3bSNicholas Bellinger } 175b8d26b3bSNicholas Bellinger 176b8d26b3bSNicholas Bellinger static int 177b8d26b3bSNicholas Bellinger isert_alloc_rx_descriptors(struct isert_conn *isert_conn) 178b8d26b3bSNicholas Bellinger { 179b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 180b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 181b8d26b3bSNicholas Bellinger struct ib_sge *rx_sg; 182b8d26b3bSNicholas Bellinger u64 dma_addr; 183b8d26b3bSNicholas Bellinger int i, j; 184b8d26b3bSNicholas Bellinger 185b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * 186b8d26b3bSNicholas Bellinger sizeof(struct iser_rx_desc), GFP_KERNEL); 187b8d26b3bSNicholas Bellinger if (!isert_conn->conn_rx_descs) 188b8d26b3bSNicholas Bellinger goto fail; 189b8d26b3bSNicholas Bellinger 190b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 191b8d26b3bSNicholas Bellinger 192b8d26b3bSNicholas Bellinger for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { 193b8d26b3bSNicholas Bellinger dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, 194b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 195b8d26b3bSNicholas Bellinger if (ib_dma_mapping_error(ib_dev, dma_addr)) 196b8d26b3bSNicholas Bellinger goto dma_map_fail; 197b8d26b3bSNicholas Bellinger 198b8d26b3bSNicholas Bellinger rx_desc->dma_addr = dma_addr; 199b8d26b3bSNicholas Bellinger 200b8d26b3bSNicholas Bellinger rx_sg = &rx_desc->rx_sg; 201b8d26b3bSNicholas Bellinger rx_sg->addr = rx_desc->dma_addr; 202b8d26b3bSNicholas Bellinger rx_sg->length = ISER_RX_PAYLOAD_SIZE; 203b8d26b3bSNicholas Bellinger rx_sg->lkey = isert_conn->conn_mr->lkey; 204b8d26b3bSNicholas Bellinger } 205b8d26b3bSNicholas Bellinger 206b8d26b3bSNicholas Bellinger isert_conn->conn_rx_desc_head = 0; 207b8d26b3bSNicholas Bellinger return 0; 208b8d26b3bSNicholas Bellinger 209b8d26b3bSNicholas Bellinger dma_map_fail: 210b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 211b8d26b3bSNicholas Bellinger for (j = 0; j < i; j++, rx_desc++) { 212b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, 213b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 214b8d26b3bSNicholas Bellinger } 215b8d26b3bSNicholas Bellinger kfree(isert_conn->conn_rx_descs); 216b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = NULL; 217b8d26b3bSNicholas Bellinger fail: 218b8d26b3bSNicholas Bellinger return -ENOMEM; 219b8d26b3bSNicholas Bellinger } 220b8d26b3bSNicholas Bellinger 221b8d26b3bSNicholas Bellinger static void 222b8d26b3bSNicholas Bellinger isert_free_rx_descriptors(struct isert_conn *isert_conn) 223b8d26b3bSNicholas Bellinger { 224b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 225b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 226b8d26b3bSNicholas Bellinger int i; 227b8d26b3bSNicholas Bellinger 228b8d26b3bSNicholas Bellinger if (!isert_conn->conn_rx_descs) 229b8d26b3bSNicholas Bellinger return; 230b8d26b3bSNicholas Bellinger 231b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 232b8d26b3bSNicholas Bellinger for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { 233b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, 234b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 235b8d26b3bSNicholas Bellinger } 236b8d26b3bSNicholas Bellinger 237b8d26b3bSNicholas Bellinger kfree(isert_conn->conn_rx_descs); 238b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = NULL; 239b8d26b3bSNicholas Bellinger } 240b8d26b3bSNicholas Bellinger 2416f0fae3dSSagi Grimberg static void isert_cq_work(struct work_struct *); 2426f0fae3dSSagi Grimberg static void isert_cq_callback(struct ib_cq *, void *); 243b8d26b3bSNicholas Bellinger 244b8d26b3bSNicholas Bellinger static int 245b8d26b3bSNicholas Bellinger isert_create_device_ib_res(struct isert_device *device) 246b8d26b3bSNicholas Bellinger { 247b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = device->ib_device; 24859464ef4SVu Pham struct ib_device_attr *dev_attr; 2494a295baeSSagi Grimberg int ret = 0, i; 2506f0fae3dSSagi Grimberg int max_cqe; 251b8d26b3bSNicholas Bellinger 25259464ef4SVu Pham dev_attr = &device->dev_attr; 25359464ef4SVu Pham ret = isert_query_device(ib_dev, dev_attr); 25459464ef4SVu Pham if (ret) 25559464ef4SVu Pham return ret; 25659464ef4SVu Pham 2576f0fae3dSSagi Grimberg max_cqe = min(ISER_MAX_CQ_LEN, dev_attr->max_cqe); 258b1a5ad00SChris Moore 259d40945d8SVu Pham /* asign function handlers */ 260f2252258SSagi Grimberg if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS && 261f2252258SSagi Grimberg dev_attr->device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) { 262a3a5a826SSagi Grimberg device->use_fastreg = 1; 263a3a5a826SSagi Grimberg device->reg_rdma_mem = isert_reg_rdma; 264a3a5a826SSagi Grimberg device->unreg_rdma_mem = isert_unreg_rdma; 26559464ef4SVu Pham } else { 266a3a5a826SSagi Grimberg device->use_fastreg = 0; 267d40945d8SVu Pham device->reg_rdma_mem = isert_map_rdma; 268d40945d8SVu Pham device->unreg_rdma_mem = isert_unmap_cmd; 26959464ef4SVu Pham } 270d40945d8SVu Pham 271d3e125daSSagi Grimberg /* Check signature cap */ 272d3e125daSSagi Grimberg device->pi_capable = dev_attr->device_cap_flags & 273d3e125daSSagi Grimberg IB_DEVICE_SIGNATURE_HANDOVER ? true : false; 274d3e125daSSagi Grimberg 2754a295baeSSagi Grimberg device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), 2764a295baeSSagi Grimberg device->ib_device->num_comp_vectors)); 2774a295baeSSagi Grimberg pr_info("Using %d CQs, %s supports %d vectors support " 278d3e125daSSagi Grimberg "Fast registration %d pi_capable %d\n", 2794a295baeSSagi Grimberg device->comps_used, device->ib_device->name, 280d3e125daSSagi Grimberg device->ib_device->num_comp_vectors, device->use_fastreg, 281d3e125daSSagi Grimberg device->pi_capable); 2824a295baeSSagi Grimberg 2834a295baeSSagi Grimberg device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), 2844a295baeSSagi Grimberg GFP_KERNEL); 2854a295baeSSagi Grimberg if (!device->comps) { 2864a295baeSSagi Grimberg pr_err("Unable to allocate completion contexts\n"); 287b8d26b3bSNicholas Bellinger return -ENOMEM; 288b8d26b3bSNicholas Bellinger } 289b8d26b3bSNicholas Bellinger 2904a295baeSSagi Grimberg for (i = 0; i < device->comps_used; i++) { 2914a295baeSSagi Grimberg struct isert_comp *comp = &device->comps[i]; 292b8d26b3bSNicholas Bellinger 2934a295baeSSagi Grimberg comp->device = device; 2946f0fae3dSSagi Grimberg INIT_WORK(&comp->work, isert_cq_work); 2956f0fae3dSSagi Grimberg comp->cq = ib_create_cq(device->ib_device, 2966f0fae3dSSagi Grimberg isert_cq_callback, 297b8d26b3bSNicholas Bellinger isert_cq_event_callback, 2984a295baeSSagi Grimberg (void *)comp, 2996f0fae3dSSagi Grimberg max_cqe, i); 3006f0fae3dSSagi Grimberg if (IS_ERR(comp->cq)) { 3016f0fae3dSSagi Grimberg ret = PTR_ERR(comp->cq); 3026f0fae3dSSagi Grimberg comp->cq = NULL; 303b8d26b3bSNicholas Bellinger goto out_cq; 30494a71110SWei Yongjun } 305b8d26b3bSNicholas Bellinger 3066f0fae3dSSagi Grimberg ret = ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); 30794a71110SWei Yongjun if (ret) 308b8d26b3bSNicholas Bellinger goto out_cq; 309b8d26b3bSNicholas Bellinger } 310b8d26b3bSNicholas Bellinger 311b8d26b3bSNicholas Bellinger return 0; 312b8d26b3bSNicholas Bellinger 313b8d26b3bSNicholas Bellinger out_cq: 3144a295baeSSagi Grimberg for (i = 0; i < device->comps_used; i++) { 3154a295baeSSagi Grimberg struct isert_comp *comp = &device->comps[i]; 316b8d26b3bSNicholas Bellinger 3176f0fae3dSSagi Grimberg if (comp->cq) { 3186f0fae3dSSagi Grimberg cancel_work_sync(&comp->work); 3196f0fae3dSSagi Grimberg ib_destroy_cq(comp->cq); 320b8d26b3bSNicholas Bellinger } 321b8d26b3bSNicholas Bellinger } 3224a295baeSSagi Grimberg kfree(device->comps); 323b8d26b3bSNicholas Bellinger 324b8d26b3bSNicholas Bellinger return ret; 325b8d26b3bSNicholas Bellinger } 326b8d26b3bSNicholas Bellinger 327b8d26b3bSNicholas Bellinger static void 328b8d26b3bSNicholas Bellinger isert_free_device_ib_res(struct isert_device *device) 329b8d26b3bSNicholas Bellinger { 330b8d26b3bSNicholas Bellinger int i; 331b8d26b3bSNicholas Bellinger 3324a295baeSSagi Grimberg pr_info("device %p\n", device); 333b8d26b3bSNicholas Bellinger 3344a295baeSSagi Grimberg for (i = 0; i < device->comps_used; i++) { 3354a295baeSSagi Grimberg struct isert_comp *comp = &device->comps[i]; 3364a295baeSSagi Grimberg 3376f0fae3dSSagi Grimberg cancel_work_sync(&comp->work); 3386f0fae3dSSagi Grimberg ib_destroy_cq(comp->cq); 3396f0fae3dSSagi Grimberg comp->cq = NULL; 340b8d26b3bSNicholas Bellinger } 3414a295baeSSagi Grimberg kfree(device->comps); 342b8d26b3bSNicholas Bellinger } 343b8d26b3bSNicholas Bellinger 344b8d26b3bSNicholas Bellinger static void 345b8d26b3bSNicholas Bellinger isert_device_try_release(struct isert_device *device) 346b8d26b3bSNicholas Bellinger { 347b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 348b8d26b3bSNicholas Bellinger device->refcount--; 349b8d26b3bSNicholas Bellinger if (!device->refcount) { 350b8d26b3bSNicholas Bellinger isert_free_device_ib_res(device); 351b8d26b3bSNicholas Bellinger list_del(&device->dev_node); 352b8d26b3bSNicholas Bellinger kfree(device); 353b8d26b3bSNicholas Bellinger } 354b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 355b8d26b3bSNicholas Bellinger } 356b8d26b3bSNicholas Bellinger 357b8d26b3bSNicholas Bellinger static struct isert_device * 358b8d26b3bSNicholas Bellinger isert_device_find_by_ib_dev(struct rdma_cm_id *cma_id) 359b8d26b3bSNicholas Bellinger { 360b8d26b3bSNicholas Bellinger struct isert_device *device; 361b8d26b3bSNicholas Bellinger int ret; 362b8d26b3bSNicholas Bellinger 363b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 364b8d26b3bSNicholas Bellinger list_for_each_entry(device, &device_list, dev_node) { 365b8d26b3bSNicholas Bellinger if (device->ib_device->node_guid == cma_id->device->node_guid) { 366b8d26b3bSNicholas Bellinger device->refcount++; 367b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 368b8d26b3bSNicholas Bellinger return device; 369b8d26b3bSNicholas Bellinger } 370b8d26b3bSNicholas Bellinger } 371b8d26b3bSNicholas Bellinger 372b8d26b3bSNicholas Bellinger device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); 373b8d26b3bSNicholas Bellinger if (!device) { 374b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 375b8d26b3bSNicholas Bellinger return ERR_PTR(-ENOMEM); 376b8d26b3bSNicholas Bellinger } 377b8d26b3bSNicholas Bellinger 378b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&device->dev_node); 379b8d26b3bSNicholas Bellinger 380b8d26b3bSNicholas Bellinger device->ib_device = cma_id->device; 381b8d26b3bSNicholas Bellinger ret = isert_create_device_ib_res(device); 382b8d26b3bSNicholas Bellinger if (ret) { 383b8d26b3bSNicholas Bellinger kfree(device); 384b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 385b8d26b3bSNicholas Bellinger return ERR_PTR(ret); 386b8d26b3bSNicholas Bellinger } 387b8d26b3bSNicholas Bellinger 388b8d26b3bSNicholas Bellinger device->refcount++; 389b8d26b3bSNicholas Bellinger list_add_tail(&device->dev_node, &device_list); 390b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 391b8d26b3bSNicholas Bellinger 392b8d26b3bSNicholas Bellinger return device; 393b8d26b3bSNicholas Bellinger } 394b8d26b3bSNicholas Bellinger 39559464ef4SVu Pham static void 396a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) 39759464ef4SVu Pham { 39859464ef4SVu Pham struct fast_reg_descriptor *fr_desc, *tmp; 39959464ef4SVu Pham int i = 0; 40059464ef4SVu Pham 401a3a5a826SSagi Grimberg if (list_empty(&isert_conn->conn_fr_pool)) 40259464ef4SVu Pham return; 40359464ef4SVu Pham 404a3a5a826SSagi Grimberg pr_debug("Freeing conn %p fastreg pool", isert_conn); 40559464ef4SVu Pham 40659464ef4SVu Pham list_for_each_entry_safe(fr_desc, tmp, 407a3a5a826SSagi Grimberg &isert_conn->conn_fr_pool, list) { 40859464ef4SVu Pham list_del(&fr_desc->list); 40959464ef4SVu Pham ib_free_fast_reg_page_list(fr_desc->data_frpl); 41059464ef4SVu Pham ib_dereg_mr(fr_desc->data_mr); 411d3e125daSSagi Grimberg if (fr_desc->pi_ctx) { 412d3e125daSSagi Grimberg ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl); 413d3e125daSSagi Grimberg ib_dereg_mr(fr_desc->pi_ctx->prot_mr); 414d3e125daSSagi Grimberg ib_destroy_mr(fr_desc->pi_ctx->sig_mr); 415d3e125daSSagi Grimberg kfree(fr_desc->pi_ctx); 416d3e125daSSagi Grimberg } 41759464ef4SVu Pham kfree(fr_desc); 41859464ef4SVu Pham ++i; 41959464ef4SVu Pham } 42059464ef4SVu Pham 421a3a5a826SSagi Grimberg if (i < isert_conn->conn_fr_pool_size) 42259464ef4SVu Pham pr_warn("Pool still has %d regions registered\n", 423a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size - i); 42459464ef4SVu Pham } 42559464ef4SVu Pham 42659464ef4SVu Pham static int 427570db170SSagi Grimberg isert_create_pi_ctx(struct fast_reg_descriptor *desc, 428570db170SSagi Grimberg struct ib_device *device, 429570db170SSagi Grimberg struct ib_pd *pd) 430570db170SSagi Grimberg { 431570db170SSagi Grimberg struct ib_mr_init_attr mr_init_attr; 432570db170SSagi Grimberg struct pi_context *pi_ctx; 433570db170SSagi Grimberg int ret; 434570db170SSagi Grimberg 435570db170SSagi Grimberg pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL); 436570db170SSagi Grimberg if (!pi_ctx) { 437570db170SSagi Grimberg pr_err("Failed to allocate pi context\n"); 438570db170SSagi Grimberg return -ENOMEM; 439570db170SSagi Grimberg } 440570db170SSagi Grimberg 441570db170SSagi Grimberg pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(device, 442570db170SSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 443570db170SSagi Grimberg if (IS_ERR(pi_ctx->prot_frpl)) { 444570db170SSagi Grimberg pr_err("Failed to allocate prot frpl err=%ld\n", 445570db170SSagi Grimberg PTR_ERR(pi_ctx->prot_frpl)); 446570db170SSagi Grimberg ret = PTR_ERR(pi_ctx->prot_frpl); 447570db170SSagi Grimberg goto err_pi_ctx; 448570db170SSagi Grimberg } 449570db170SSagi Grimberg 450570db170SSagi Grimberg pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); 451570db170SSagi Grimberg if (IS_ERR(pi_ctx->prot_mr)) { 452570db170SSagi Grimberg pr_err("Failed to allocate prot frmr err=%ld\n", 453570db170SSagi Grimberg PTR_ERR(pi_ctx->prot_mr)); 454570db170SSagi Grimberg ret = PTR_ERR(pi_ctx->prot_mr); 455570db170SSagi Grimberg goto err_prot_frpl; 456570db170SSagi Grimberg } 457570db170SSagi Grimberg desc->ind |= ISERT_PROT_KEY_VALID; 458570db170SSagi Grimberg 459570db170SSagi Grimberg memset(&mr_init_attr, 0, sizeof(mr_init_attr)); 460570db170SSagi Grimberg mr_init_attr.max_reg_descriptors = 2; 461570db170SSagi Grimberg mr_init_attr.flags |= IB_MR_SIGNATURE_EN; 462570db170SSagi Grimberg pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr); 463570db170SSagi Grimberg if (IS_ERR(pi_ctx->sig_mr)) { 464570db170SSagi Grimberg pr_err("Failed to allocate signature enabled mr err=%ld\n", 465570db170SSagi Grimberg PTR_ERR(pi_ctx->sig_mr)); 466570db170SSagi Grimberg ret = PTR_ERR(pi_ctx->sig_mr); 467570db170SSagi Grimberg goto err_prot_mr; 468570db170SSagi Grimberg } 469570db170SSagi Grimberg 470570db170SSagi Grimberg desc->pi_ctx = pi_ctx; 471570db170SSagi Grimberg desc->ind |= ISERT_SIG_KEY_VALID; 472570db170SSagi Grimberg desc->ind &= ~ISERT_PROTECTED; 473570db170SSagi Grimberg 474570db170SSagi Grimberg return 0; 475570db170SSagi Grimberg 476570db170SSagi Grimberg err_prot_mr: 477570db170SSagi Grimberg ib_dereg_mr(desc->pi_ctx->prot_mr); 478570db170SSagi Grimberg err_prot_frpl: 479570db170SSagi Grimberg ib_free_fast_reg_page_list(desc->pi_ctx->prot_frpl); 480570db170SSagi Grimberg err_pi_ctx: 481570db170SSagi Grimberg kfree(desc->pi_ctx); 482570db170SSagi Grimberg 483570db170SSagi Grimberg return ret; 484570db170SSagi Grimberg } 485570db170SSagi Grimberg 486570db170SSagi Grimberg static int 487dc87a90fSSagi Grimberg isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, 488570db170SSagi Grimberg struct fast_reg_descriptor *fr_desc) 489dc87a90fSSagi Grimberg { 490d3e125daSSagi Grimberg int ret; 491d3e125daSSagi Grimberg 492dc87a90fSSagi Grimberg fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device, 493dc87a90fSSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 494dc87a90fSSagi Grimberg if (IS_ERR(fr_desc->data_frpl)) { 495dc87a90fSSagi Grimberg pr_err("Failed to allocate data frpl err=%ld\n", 496dc87a90fSSagi Grimberg PTR_ERR(fr_desc->data_frpl)); 497dc87a90fSSagi Grimberg return PTR_ERR(fr_desc->data_frpl); 498dc87a90fSSagi Grimberg } 499dc87a90fSSagi Grimberg 500dc87a90fSSagi Grimberg fr_desc->data_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); 501dc87a90fSSagi Grimberg if (IS_ERR(fr_desc->data_mr)) { 502dc87a90fSSagi Grimberg pr_err("Failed to allocate data frmr err=%ld\n", 503dc87a90fSSagi Grimberg PTR_ERR(fr_desc->data_mr)); 504d3e125daSSagi Grimberg ret = PTR_ERR(fr_desc->data_mr); 505d3e125daSSagi Grimberg goto err_data_frpl; 506dc87a90fSSagi Grimberg } 507d3e125daSSagi Grimberg fr_desc->ind |= ISERT_DATA_KEY_VALID; 508dc87a90fSSagi Grimberg 509570db170SSagi Grimberg pr_debug("Created fr_desc %p\n", fr_desc); 510dc87a90fSSagi Grimberg 511dc87a90fSSagi Grimberg return 0; 512570db170SSagi Grimberg 513d3e125daSSagi Grimberg err_data_frpl: 514d3e125daSSagi Grimberg ib_free_fast_reg_page_list(fr_desc->data_frpl); 515d3e125daSSagi Grimberg 516d3e125daSSagi Grimberg return ret; 517dc87a90fSSagi Grimberg } 518dc87a90fSSagi Grimberg 519dc87a90fSSagi Grimberg static int 520570db170SSagi Grimberg isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) 52159464ef4SVu Pham { 52259464ef4SVu Pham struct fast_reg_descriptor *fr_desc; 52359464ef4SVu Pham struct isert_device *device = isert_conn->conn_device; 524f46d6a8aSNicholas Bellinger struct se_session *se_sess = isert_conn->conn->sess->se_sess; 525f46d6a8aSNicholas Bellinger struct se_node_acl *se_nacl = se_sess->se_node_acl; 526f46d6a8aSNicholas Bellinger int i, ret, tag_num; 527f46d6a8aSNicholas Bellinger /* 528f46d6a8aSNicholas Bellinger * Setup the number of FRMRs based upon the number of tags 529f46d6a8aSNicholas Bellinger * available to session in iscsi_target_locate_portal(). 530f46d6a8aSNicholas Bellinger */ 531f46d6a8aSNicholas Bellinger tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth); 532f46d6a8aSNicholas Bellinger tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; 53359464ef4SVu Pham 534a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size = 0; 535f46d6a8aSNicholas Bellinger for (i = 0; i < tag_num; i++) { 53659464ef4SVu Pham fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); 53759464ef4SVu Pham if (!fr_desc) { 53859464ef4SVu Pham pr_err("Failed to allocate fast_reg descriptor\n"); 53959464ef4SVu Pham ret = -ENOMEM; 54059464ef4SVu Pham goto err; 54159464ef4SVu Pham } 54259464ef4SVu Pham 543dc87a90fSSagi Grimberg ret = isert_create_fr_desc(device->ib_device, 544570db170SSagi Grimberg isert_conn->conn_pd, fr_desc); 545dc87a90fSSagi Grimberg if (ret) { 546dc87a90fSSagi Grimberg pr_err("Failed to create fastreg descriptor err=%d\n", 547dc87a90fSSagi Grimberg ret); 548a80e21b3SNicholas Bellinger kfree(fr_desc); 54959464ef4SVu Pham goto err; 55059464ef4SVu Pham } 55159464ef4SVu Pham 552a3a5a826SSagi Grimberg list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); 553a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size++; 55459464ef4SVu Pham } 55559464ef4SVu Pham 556a3a5a826SSagi Grimberg pr_debug("Creating conn %p fastreg pool size=%d", 557a3a5a826SSagi Grimberg isert_conn, isert_conn->conn_fr_pool_size); 55859464ef4SVu Pham 55959464ef4SVu Pham return 0; 56059464ef4SVu Pham 56159464ef4SVu Pham err: 562a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(isert_conn); 56359464ef4SVu Pham return ret; 56459464ef4SVu Pham } 56559464ef4SVu Pham 566b8d26b3bSNicholas Bellinger static int 567b8d26b3bSNicholas Bellinger isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) 568b8d26b3bSNicholas Bellinger { 569ca6c1d82SSagi Grimberg struct isert_np *isert_np = cma_id->context; 570ca6c1d82SSagi Grimberg struct iscsi_np *np = isert_np->np; 571b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 572b8d26b3bSNicholas Bellinger struct isert_device *device; 573b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = cma_id->device; 574b8d26b3bSNicholas Bellinger int ret = 0; 57514f4b54fSSagi Grimberg 57614f4b54fSSagi Grimberg spin_lock_bh(&np->np_thread_lock); 57714f4b54fSSagi Grimberg if (!np->enabled) { 57814f4b54fSSagi Grimberg spin_unlock_bh(&np->np_thread_lock); 57914f4b54fSSagi Grimberg pr_debug("iscsi_np is not enabled, reject connect request\n"); 58014f4b54fSSagi Grimberg return rdma_reject(cma_id, NULL, 0); 58114f4b54fSSagi Grimberg } 58214f4b54fSSagi Grimberg spin_unlock_bh(&np->np_thread_lock); 583b8d26b3bSNicholas Bellinger 584b8d26b3bSNicholas Bellinger pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n", 585b8d26b3bSNicholas Bellinger cma_id, cma_id->context); 586b8d26b3bSNicholas Bellinger 587b8d26b3bSNicholas Bellinger isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); 588b8d26b3bSNicholas Bellinger if (!isert_conn) { 589b8d26b3bSNicholas Bellinger pr_err("Unable to allocate isert_conn\n"); 590b8d26b3bSNicholas Bellinger return -ENOMEM; 591b8d26b3bSNicholas Bellinger } 592b8d26b3bSNicholas Bellinger isert_conn->state = ISER_CONN_INIT; 593b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&isert_conn->conn_accept_node); 594b8d26b3bSNicholas Bellinger init_completion(&isert_conn->conn_login_comp); 5952371e5daSSagi Grimberg init_completion(&isert_conn->login_req_comp); 596defd8848SNicholas Bellinger init_completion(&isert_conn->conn_wait); 597b8d26b3bSNicholas Bellinger kref_init(&isert_conn->conn_kref); 598b2cb9649SNicholas Bellinger mutex_init(&isert_conn->conn_mutex); 59959464ef4SVu Pham spin_lock_init(&isert_conn->conn_lock); 600f46d6a8aSNicholas Bellinger INIT_LIST_HEAD(&isert_conn->conn_fr_pool); 601b8d26b3bSNicholas Bellinger 602b8d26b3bSNicholas Bellinger isert_conn->conn_cm_id = cma_id; 603b8d26b3bSNicholas Bellinger 604b8d26b3bSNicholas Bellinger isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + 605b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, GFP_KERNEL); 606b8d26b3bSNicholas Bellinger if (!isert_conn->login_buf) { 607b8d26b3bSNicholas Bellinger pr_err("Unable to allocate isert_conn->login_buf\n"); 608b8d26b3bSNicholas Bellinger ret = -ENOMEM; 609b8d26b3bSNicholas Bellinger goto out; 610b8d26b3bSNicholas Bellinger } 611b8d26b3bSNicholas Bellinger 612b8d26b3bSNicholas Bellinger isert_conn->login_req_buf = isert_conn->login_buf; 613b8d26b3bSNicholas Bellinger isert_conn->login_rsp_buf = isert_conn->login_buf + 614b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN; 615b8d26b3bSNicholas Bellinger pr_debug("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", 616b8d26b3bSNicholas Bellinger isert_conn->login_buf, isert_conn->login_req_buf, 617b8d26b3bSNicholas Bellinger isert_conn->login_rsp_buf); 618b8d26b3bSNicholas Bellinger 619b8d26b3bSNicholas Bellinger isert_conn->login_req_dma = ib_dma_map_single(ib_dev, 620b8d26b3bSNicholas Bellinger (void *)isert_conn->login_req_buf, 621b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); 622b8d26b3bSNicholas Bellinger 623b8d26b3bSNicholas Bellinger ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); 624b8d26b3bSNicholas Bellinger if (ret) { 625b8d26b3bSNicholas Bellinger pr_err("ib_dma_mapping_error failed for login_req_dma: %d\n", 626b8d26b3bSNicholas Bellinger ret); 627b8d26b3bSNicholas Bellinger isert_conn->login_req_dma = 0; 628b8d26b3bSNicholas Bellinger goto out_login_buf; 629b8d26b3bSNicholas Bellinger } 630b8d26b3bSNicholas Bellinger 631b8d26b3bSNicholas Bellinger isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, 632b8d26b3bSNicholas Bellinger (void *)isert_conn->login_rsp_buf, 633b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 634b8d26b3bSNicholas Bellinger 635b8d26b3bSNicholas Bellinger ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); 636b8d26b3bSNicholas Bellinger if (ret) { 637b8d26b3bSNicholas Bellinger pr_err("ib_dma_mapping_error failed for login_rsp_dma: %d\n", 638b8d26b3bSNicholas Bellinger ret); 639b8d26b3bSNicholas Bellinger isert_conn->login_rsp_dma = 0; 640b8d26b3bSNicholas Bellinger goto out_req_dma_map; 641b8d26b3bSNicholas Bellinger } 642b8d26b3bSNicholas Bellinger 643b8d26b3bSNicholas Bellinger device = isert_device_find_by_ib_dev(cma_id); 644b8d26b3bSNicholas Bellinger if (IS_ERR(device)) { 645b8d26b3bSNicholas Bellinger ret = PTR_ERR(device); 646b8d26b3bSNicholas Bellinger goto out_rsp_dma_map; 647b8d26b3bSNicholas Bellinger } 648b8d26b3bSNicholas Bellinger 6491a92e17eSSagi Grimberg /* Set max inflight RDMA READ requests */ 6501a92e17eSSagi Grimberg isert_conn->initiator_depth = min_t(u8, 6511a92e17eSSagi Grimberg event->param.conn.initiator_depth, 6521a92e17eSSagi Grimberg device->dev_attr.max_qp_init_rd_atom); 6531a92e17eSSagi Grimberg pr_debug("Using initiator_depth: %u\n", isert_conn->initiator_depth); 6541a92e17eSSagi Grimberg 655b8d26b3bSNicholas Bellinger isert_conn->conn_device = device; 656eb6ab132SSagi Grimberg isert_conn->conn_pd = ib_alloc_pd(isert_conn->conn_device->ib_device); 657eb6ab132SSagi Grimberg if (IS_ERR(isert_conn->conn_pd)) { 658eb6ab132SSagi Grimberg ret = PTR_ERR(isert_conn->conn_pd); 659eb6ab132SSagi Grimberg pr_err("ib_alloc_pd failed for conn %p: ret=%d\n", 660eb6ab132SSagi Grimberg isert_conn, ret); 661eb6ab132SSagi Grimberg goto out_pd; 662eb6ab132SSagi Grimberg } 663b8d26b3bSNicholas Bellinger 664eb6ab132SSagi Grimberg isert_conn->conn_mr = ib_get_dma_mr(isert_conn->conn_pd, 665eb6ab132SSagi Grimberg IB_ACCESS_LOCAL_WRITE); 666eb6ab132SSagi Grimberg if (IS_ERR(isert_conn->conn_mr)) { 667eb6ab132SSagi Grimberg ret = PTR_ERR(isert_conn->conn_mr); 668eb6ab132SSagi Grimberg pr_err("ib_get_dma_mr failed for conn %p: ret=%d\n", 669eb6ab132SSagi Grimberg isert_conn, ret); 670eb6ab132SSagi Grimberg goto out_mr; 671eb6ab132SSagi Grimberg } 672b8d26b3bSNicholas Bellinger 673570db170SSagi Grimberg ret = isert_conn_setup_qp(isert_conn, cma_id); 674b8d26b3bSNicholas Bellinger if (ret) 675b8d26b3bSNicholas Bellinger goto out_conn_dev; 676b8d26b3bSNicholas Bellinger 6772371e5daSSagi Grimberg ret = isert_rdma_post_recvl(isert_conn); 6782371e5daSSagi Grimberg if (ret) 6792371e5daSSagi Grimberg goto out_conn_dev; 6802371e5daSSagi Grimberg 6812371e5daSSagi Grimberg ret = isert_rdma_accept(isert_conn); 6822371e5daSSagi Grimberg if (ret) 6832371e5daSSagi Grimberg goto out_conn_dev; 6842371e5daSSagi Grimberg 685b8d26b3bSNicholas Bellinger mutex_lock(&isert_np->np_accept_mutex); 6869fe63c88SSagi Grimberg list_add_tail(&isert_conn->conn_accept_node, &isert_np->np_accept_list); 687b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 688b8d26b3bSNicholas Bellinger 689531b7bf4SSagi Grimberg pr_debug("isert_connect_request() up np_sem np: %p\n", np); 690531b7bf4SSagi Grimberg up(&isert_np->np_sem); 691b8d26b3bSNicholas Bellinger return 0; 692b8d26b3bSNicholas Bellinger 693b8d26b3bSNicholas Bellinger out_conn_dev: 694eb6ab132SSagi Grimberg ib_dereg_mr(isert_conn->conn_mr); 695eb6ab132SSagi Grimberg out_mr: 696eb6ab132SSagi Grimberg ib_dealloc_pd(isert_conn->conn_pd); 697eb6ab132SSagi Grimberg out_pd: 698b8d26b3bSNicholas Bellinger isert_device_try_release(device); 699b8d26b3bSNicholas Bellinger out_rsp_dma_map: 700b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, 701b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 702b8d26b3bSNicholas Bellinger out_req_dma_map: 703b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, 704b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); 705b8d26b3bSNicholas Bellinger out_login_buf: 706b8d26b3bSNicholas Bellinger kfree(isert_conn->login_buf); 707b8d26b3bSNicholas Bellinger out: 708b8d26b3bSNicholas Bellinger kfree(isert_conn); 7092371e5daSSagi Grimberg rdma_reject(cma_id, NULL, 0); 710b8d26b3bSNicholas Bellinger return ret; 711b8d26b3bSNicholas Bellinger } 712b8d26b3bSNicholas Bellinger 713b8d26b3bSNicholas Bellinger static void 714b8d26b3bSNicholas Bellinger isert_connect_release(struct isert_conn *isert_conn) 715b8d26b3bSNicholas Bellinger { 716b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 717b8d26b3bSNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 718b8d26b3bSNicholas Bellinger 719b8d26b3bSNicholas Bellinger pr_debug("Entering isert_connect_release(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); 720b8d26b3bSNicholas Bellinger 721a3a5a826SSagi Grimberg if (device && device->use_fastreg) 722a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(isert_conn); 72359464ef4SVu Pham 72419e2090fSSagi Grimberg isert_free_rx_descriptors(isert_conn); 72519e2090fSSagi Grimberg rdma_destroy_id(isert_conn->conn_cm_id); 72619e2090fSSagi Grimberg 727b8d26b3bSNicholas Bellinger if (isert_conn->conn_qp) { 7284a295baeSSagi Grimberg struct isert_comp *comp = isert_conn->conn_qp->recv_cq->cq_context; 7294a295baeSSagi Grimberg 7304a295baeSSagi Grimberg pr_debug("dec completion context %p active_qps\n", comp); 73119e2090fSSagi Grimberg mutex_lock(&device_list_mutex); 7324a295baeSSagi Grimberg comp->active_qps--; 73319e2090fSSagi Grimberg mutex_unlock(&device_list_mutex); 734b8d26b3bSNicholas Bellinger 73519e2090fSSagi Grimberg ib_destroy_qp(isert_conn->conn_qp); 736b8d26b3bSNicholas Bellinger } 737b8d26b3bSNicholas Bellinger 738eb6ab132SSagi Grimberg ib_dereg_mr(isert_conn->conn_mr); 739eb6ab132SSagi Grimberg ib_dealloc_pd(isert_conn->conn_pd); 740eb6ab132SSagi Grimberg 741b8d26b3bSNicholas Bellinger if (isert_conn->login_buf) { 742b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, 743b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 744b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, 745b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, 746b8d26b3bSNicholas Bellinger DMA_FROM_DEVICE); 747b8d26b3bSNicholas Bellinger kfree(isert_conn->login_buf); 748b8d26b3bSNicholas Bellinger } 749b8d26b3bSNicholas Bellinger kfree(isert_conn); 750b8d26b3bSNicholas Bellinger 751b8d26b3bSNicholas Bellinger if (device) 752b8d26b3bSNicholas Bellinger isert_device_try_release(device); 753b8d26b3bSNicholas Bellinger 754b8d26b3bSNicholas Bellinger pr_debug("Leaving isert_connect_release >>>>>>>>>>>>\n"); 755b8d26b3bSNicholas Bellinger } 756b8d26b3bSNicholas Bellinger 757b8d26b3bSNicholas Bellinger static void 758b8d26b3bSNicholas Bellinger isert_connected_handler(struct rdma_cm_id *cma_id) 759b8d26b3bSNicholas Bellinger { 76019e2090fSSagi Grimberg struct isert_conn *isert_conn = cma_id->qp->qp_context; 761c2f88b17SSagi Grimberg 762128e9cc8SSagi Grimberg pr_info("conn %p\n", isert_conn); 763128e9cc8SSagi Grimberg 7642371e5daSSagi Grimberg if (!kref_get_unless_zero(&isert_conn->conn_kref)) { 7652371e5daSSagi Grimberg pr_warn("conn %p connect_release is running\n", isert_conn); 7662371e5daSSagi Grimberg return; 7672371e5daSSagi Grimberg } 7682371e5daSSagi Grimberg 7692371e5daSSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 7702371e5daSSagi Grimberg if (isert_conn->state != ISER_CONN_FULL_FEATURE) 771128e9cc8SSagi Grimberg isert_conn->state = ISER_CONN_UP; 7722371e5daSSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 773b8d26b3bSNicholas Bellinger } 774b8d26b3bSNicholas Bellinger 775b8d26b3bSNicholas Bellinger static void 776b8d26b3bSNicholas Bellinger isert_release_conn_kref(struct kref *kref) 777b8d26b3bSNicholas Bellinger { 778b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = container_of(kref, 779b8d26b3bSNicholas Bellinger struct isert_conn, conn_kref); 780b8d26b3bSNicholas Bellinger 781b8d26b3bSNicholas Bellinger pr_debug("Calling isert_connect_release for final kref %s/%d\n", 782b8d26b3bSNicholas Bellinger current->comm, current->pid); 783b8d26b3bSNicholas Bellinger 784b8d26b3bSNicholas Bellinger isert_connect_release(isert_conn); 785b8d26b3bSNicholas Bellinger } 786b8d26b3bSNicholas Bellinger 787b8d26b3bSNicholas Bellinger static void 788b8d26b3bSNicholas Bellinger isert_put_conn(struct isert_conn *isert_conn) 789b8d26b3bSNicholas Bellinger { 790b8d26b3bSNicholas Bellinger kref_put(&isert_conn->conn_kref, isert_release_conn_kref); 791b8d26b3bSNicholas Bellinger } 792b8d26b3bSNicholas Bellinger 793954f2372SSagi Grimberg /** 794954f2372SSagi Grimberg * isert_conn_terminate() - Initiate connection termination 795954f2372SSagi Grimberg * @isert_conn: isert connection struct 796954f2372SSagi Grimberg * 797954f2372SSagi Grimberg * Notes: 798128e9cc8SSagi Grimberg * In case the connection state is FULL_FEATURE, move state 799954f2372SSagi Grimberg * to TEMINATING and start teardown sequence (rdma_disconnect). 800128e9cc8SSagi Grimberg * In case the connection state is UP, complete flush as well. 801954f2372SSagi Grimberg * 802954f2372SSagi Grimberg * This routine must be called with conn_mutex held. Thus it is 803954f2372SSagi Grimberg * safe to call multiple times. 804954f2372SSagi Grimberg */ 805954f2372SSagi Grimberg static void 806954f2372SSagi Grimberg isert_conn_terminate(struct isert_conn *isert_conn) 807954f2372SSagi Grimberg { 808954f2372SSagi Grimberg int err; 809954f2372SSagi Grimberg 810128e9cc8SSagi Grimberg switch (isert_conn->state) { 811128e9cc8SSagi Grimberg case ISER_CONN_TERMINATING: 812128e9cc8SSagi Grimberg break; 813128e9cc8SSagi Grimberg case ISER_CONN_UP: 814128e9cc8SSagi Grimberg case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ 815954f2372SSagi Grimberg pr_info("Terminating conn %p state %d\n", 816954f2372SSagi Grimberg isert_conn, isert_conn->state); 817128e9cc8SSagi Grimberg isert_conn->state = ISER_CONN_TERMINATING; 818954f2372SSagi Grimberg err = rdma_disconnect(isert_conn->conn_cm_id); 819954f2372SSagi Grimberg if (err) 820954f2372SSagi Grimberg pr_warn("Failed rdma_disconnect isert_conn %p\n", 821954f2372SSagi Grimberg isert_conn); 822128e9cc8SSagi Grimberg break; 823128e9cc8SSagi Grimberg default: 824128e9cc8SSagi Grimberg pr_warn("conn %p teminating in state %d\n", 825128e9cc8SSagi Grimberg isert_conn, isert_conn->state); 826954f2372SSagi Grimberg } 827954f2372SSagi Grimberg } 828954f2372SSagi Grimberg 8293b726ae2SSagi Grimberg static int 830ca6c1d82SSagi Grimberg isert_np_cma_handler(struct isert_np *isert_np, 831ca6c1d82SSagi Grimberg enum rdma_cm_event_type event) 832b8d26b3bSNicholas Bellinger { 833ca6c1d82SSagi Grimberg pr_debug("isert np %p, handling event %d\n", isert_np, event); 8343b726ae2SSagi Grimberg 835ca6c1d82SSagi Grimberg switch (event) { 836ca6c1d82SSagi Grimberg case RDMA_CM_EVENT_DEVICE_REMOVAL: 8373b726ae2SSagi Grimberg isert_np->np_cm_id = NULL; 838ca6c1d82SSagi Grimberg break; 839ca6c1d82SSagi Grimberg case RDMA_CM_EVENT_ADDR_CHANGE: 840ca6c1d82SSagi Grimberg isert_np->np_cm_id = isert_setup_id(isert_np); 841ca6c1d82SSagi Grimberg if (IS_ERR(isert_np->np_cm_id)) { 842ca6c1d82SSagi Grimberg pr_err("isert np %p setup id failed: %ld\n", 843ca6c1d82SSagi Grimberg isert_np, PTR_ERR(isert_np->np_cm_id)); 844ca6c1d82SSagi Grimberg isert_np->np_cm_id = NULL; 845ca6c1d82SSagi Grimberg } 846ca6c1d82SSagi Grimberg break; 847ca6c1d82SSagi Grimberg default: 848ca6c1d82SSagi Grimberg pr_err("isert np %p Unexpected event %d\n", 849ca6c1d82SSagi Grimberg isert_np, event); 850ca6c1d82SSagi Grimberg } 851ca6c1d82SSagi Grimberg 8523b726ae2SSagi Grimberg return -1; 8533b726ae2SSagi Grimberg } 8543b726ae2SSagi Grimberg 855ca6c1d82SSagi Grimberg static int 856ca6c1d82SSagi Grimberg isert_disconnected_handler(struct rdma_cm_id *cma_id, 857ca6c1d82SSagi Grimberg enum rdma_cm_event_type event) 858ca6c1d82SSagi Grimberg { 859ca6c1d82SSagi Grimberg struct isert_np *isert_np = cma_id->context; 860ca6c1d82SSagi Grimberg struct isert_conn *isert_conn; 861ca6c1d82SSagi Grimberg 862ca6c1d82SSagi Grimberg if (isert_np->np_cm_id == cma_id) 863ca6c1d82SSagi Grimberg return isert_np_cma_handler(cma_id->context, event); 864ca6c1d82SSagi Grimberg 86519e2090fSSagi Grimberg isert_conn = cma_id->qp->qp_context; 866b8d26b3bSNicholas Bellinger 867128e9cc8SSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 868128e9cc8SSagi Grimberg isert_conn_terminate(isert_conn); 869128e9cc8SSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 870128e9cc8SSagi Grimberg 871128e9cc8SSagi Grimberg pr_info("conn %p completing conn_wait\n", isert_conn); 872128e9cc8SSagi Grimberg complete(&isert_conn->conn_wait); 8733b726ae2SSagi Grimberg 8743b726ae2SSagi Grimberg return 0; 875b8d26b3bSNicholas Bellinger } 876b8d26b3bSNicholas Bellinger 877954f2372SSagi Grimberg static void 878954f2372SSagi Grimberg isert_connect_error(struct rdma_cm_id *cma_id) 879954f2372SSagi Grimberg { 88019e2090fSSagi Grimberg struct isert_conn *isert_conn = cma_id->qp->qp_context; 881954f2372SSagi Grimberg 882954f2372SSagi Grimberg isert_put_conn(isert_conn); 883954f2372SSagi Grimberg } 884954f2372SSagi Grimberg 885b8d26b3bSNicholas Bellinger static int 886b8d26b3bSNicholas Bellinger isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) 887b8d26b3bSNicholas Bellinger { 888b8d26b3bSNicholas Bellinger int ret = 0; 889b8d26b3bSNicholas Bellinger 890b8d26b3bSNicholas Bellinger pr_debug("isert_cma_handler: event %d status %d conn %p id %p\n", 891b8d26b3bSNicholas Bellinger event->event, event->status, cma_id->context, cma_id); 892b8d26b3bSNicholas Bellinger 893b8d26b3bSNicholas Bellinger switch (event->event) { 894b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_CONNECT_REQUEST: 895b8d26b3bSNicholas Bellinger ret = isert_connect_request(cma_id, event); 8963b726ae2SSagi Grimberg if (ret) 8973b726ae2SSagi Grimberg pr_err("isert_cma_handler failed RDMA_CM_EVENT: 0x%08x %d\n", 8983b726ae2SSagi Grimberg event->event, ret); 899b8d26b3bSNicholas Bellinger break; 900b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_ESTABLISHED: 901b8d26b3bSNicholas Bellinger isert_connected_handler(cma_id); 902b8d26b3bSNicholas Bellinger break; 90388c4015fSSagi Grimberg case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ 90488c4015fSSagi Grimberg case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ 90588c4015fSSagi Grimberg case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */ 90688c4015fSSagi Grimberg case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ 907ca6c1d82SSagi Grimberg ret = isert_disconnected_handler(cma_id, event->event); 908b8d26b3bSNicholas Bellinger break; 909954f2372SSagi Grimberg case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ 910954f2372SSagi Grimberg case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ 911b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_CONNECT_ERROR: 912954f2372SSagi Grimberg isert_connect_error(cma_id); 913954f2372SSagi Grimberg break; 914b8d26b3bSNicholas Bellinger default: 91588c4015fSSagi Grimberg pr_err("Unhandled RDMA CMA event: %d\n", event->event); 916b8d26b3bSNicholas Bellinger break; 917b8d26b3bSNicholas Bellinger } 918b8d26b3bSNicholas Bellinger 919b8d26b3bSNicholas Bellinger return ret; 920b8d26b3bSNicholas Bellinger } 921b8d26b3bSNicholas Bellinger 922b8d26b3bSNicholas Bellinger static int 923b8d26b3bSNicholas Bellinger isert_post_recv(struct isert_conn *isert_conn, u32 count) 924b8d26b3bSNicholas Bellinger { 925b8d26b3bSNicholas Bellinger struct ib_recv_wr *rx_wr, *rx_wr_failed; 926b8d26b3bSNicholas Bellinger int i, ret; 927b8d26b3bSNicholas Bellinger unsigned int rx_head = isert_conn->conn_rx_desc_head; 928b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 929b8d26b3bSNicholas Bellinger 930b8d26b3bSNicholas Bellinger for (rx_wr = isert_conn->conn_rx_wr, i = 0; i < count; i++, rx_wr++) { 931b8d26b3bSNicholas Bellinger rx_desc = &isert_conn->conn_rx_descs[rx_head]; 932b0a191e7SSagi Grimberg rx_wr->wr_id = (uintptr_t)rx_desc; 933b8d26b3bSNicholas Bellinger rx_wr->sg_list = &rx_desc->rx_sg; 934b8d26b3bSNicholas Bellinger rx_wr->num_sge = 1; 935b8d26b3bSNicholas Bellinger rx_wr->next = rx_wr + 1; 936b8d26b3bSNicholas Bellinger rx_head = (rx_head + 1) & (ISERT_QP_MAX_RECV_DTOS - 1); 937b8d26b3bSNicholas Bellinger } 938b8d26b3bSNicholas Bellinger 939b8d26b3bSNicholas Bellinger rx_wr--; 940b8d26b3bSNicholas Bellinger rx_wr->next = NULL; /* mark end of work requests list */ 941b8d26b3bSNicholas Bellinger 942b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count += count; 943b8d26b3bSNicholas Bellinger ret = ib_post_recv(isert_conn->conn_qp, isert_conn->conn_rx_wr, 944b8d26b3bSNicholas Bellinger &rx_wr_failed); 945b8d26b3bSNicholas Bellinger if (ret) { 946b8d26b3bSNicholas Bellinger pr_err("ib_post_recv() failed with ret: %d\n", ret); 947b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count -= count; 948b8d26b3bSNicholas Bellinger } else { 949b8d26b3bSNicholas Bellinger pr_debug("isert_post_recv(): Posted %d RX buffers\n", count); 950b8d26b3bSNicholas Bellinger isert_conn->conn_rx_desc_head = rx_head; 951b8d26b3bSNicholas Bellinger } 952b8d26b3bSNicholas Bellinger return ret; 953b8d26b3bSNicholas Bellinger } 954b8d26b3bSNicholas Bellinger 955b8d26b3bSNicholas Bellinger static int 956b8d26b3bSNicholas Bellinger isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) 957b8d26b3bSNicholas Bellinger { 958b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 959b8d26b3bSNicholas Bellinger struct ib_send_wr send_wr, *send_wr_failed; 960b8d26b3bSNicholas Bellinger int ret; 961b8d26b3bSNicholas Bellinger 962b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, 963b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 964b8d26b3bSNicholas Bellinger 965b8d26b3bSNicholas Bellinger send_wr.next = NULL; 966b0a191e7SSagi Grimberg send_wr.wr_id = (uintptr_t)tx_desc; 967b8d26b3bSNicholas Bellinger send_wr.sg_list = tx_desc->tx_sg; 968b8d26b3bSNicholas Bellinger send_wr.num_sge = tx_desc->num_sge; 969b8d26b3bSNicholas Bellinger send_wr.opcode = IB_WR_SEND; 970b8d26b3bSNicholas Bellinger send_wr.send_flags = IB_SEND_SIGNALED; 971b8d26b3bSNicholas Bellinger 972b8d26b3bSNicholas Bellinger ret = ib_post_send(isert_conn->conn_qp, &send_wr, &send_wr_failed); 973*bdf20e72SSagi Grimberg if (ret) 974b8d26b3bSNicholas Bellinger pr_err("ib_post_send() failed, ret: %d\n", ret); 975b8d26b3bSNicholas Bellinger 976b8d26b3bSNicholas Bellinger return ret; 977b8d26b3bSNicholas Bellinger } 978b8d26b3bSNicholas Bellinger 979b8d26b3bSNicholas Bellinger static void 980b8d26b3bSNicholas Bellinger isert_create_send_desc(struct isert_conn *isert_conn, 981b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd, 982b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc) 983b8d26b3bSNicholas Bellinger { 984b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 985b8d26b3bSNicholas Bellinger 986b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, 987b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 988b8d26b3bSNicholas Bellinger 989b8d26b3bSNicholas Bellinger memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); 990b8d26b3bSNicholas Bellinger tx_desc->iser_header.flags = ISER_VER; 991b8d26b3bSNicholas Bellinger 992b8d26b3bSNicholas Bellinger tx_desc->num_sge = 1; 993b8d26b3bSNicholas Bellinger tx_desc->isert_cmd = isert_cmd; 994b8d26b3bSNicholas Bellinger 995b8d26b3bSNicholas Bellinger if (tx_desc->tx_sg[0].lkey != isert_conn->conn_mr->lkey) { 996b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey; 997b8d26b3bSNicholas Bellinger pr_debug("tx_desc %p lkey mismatch, fixing\n", tx_desc); 998b8d26b3bSNicholas Bellinger } 999b8d26b3bSNicholas Bellinger } 1000b8d26b3bSNicholas Bellinger 1001b8d26b3bSNicholas Bellinger static int 1002b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(struct isert_conn *isert_conn, 1003b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc) 1004b8d26b3bSNicholas Bellinger { 1005b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1006b8d26b3bSNicholas Bellinger u64 dma_addr; 1007b8d26b3bSNicholas Bellinger 1008b8d26b3bSNicholas Bellinger dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, 1009b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 1010b8d26b3bSNicholas Bellinger if (ib_dma_mapping_error(ib_dev, dma_addr)) { 1011b8d26b3bSNicholas Bellinger pr_err("ib_dma_mapping_error() failed\n"); 1012b8d26b3bSNicholas Bellinger return -ENOMEM; 1013b8d26b3bSNicholas Bellinger } 1014b8d26b3bSNicholas Bellinger 1015b8d26b3bSNicholas Bellinger tx_desc->dma_addr = dma_addr; 1016b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].addr = tx_desc->dma_addr; 1017b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; 1018b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey; 1019b8d26b3bSNicholas Bellinger 1020b8d26b3bSNicholas Bellinger pr_debug("isert_init_tx_hdrs: Setup tx_sg[0].addr: 0x%llx length: %u" 1021b8d26b3bSNicholas Bellinger " lkey: 0x%08x\n", tx_desc->tx_sg[0].addr, 1022b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].length, tx_desc->tx_sg[0].lkey); 1023b8d26b3bSNicholas Bellinger 1024b8d26b3bSNicholas Bellinger return 0; 1025b8d26b3bSNicholas Bellinger } 1026b8d26b3bSNicholas Bellinger 1027b8d26b3bSNicholas Bellinger static void 102895b60f07SNicholas Bellinger isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 102968a86deeSSagi Grimberg struct ib_send_wr *send_wr) 1030b8d26b3bSNicholas Bellinger { 103195b60f07SNicholas Bellinger struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; 103295b60f07SNicholas Bellinger 1033b8d26b3bSNicholas Bellinger isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; 1034b0a191e7SSagi Grimberg send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; 1035b8d26b3bSNicholas Bellinger send_wr->opcode = IB_WR_SEND; 103695b60f07SNicholas Bellinger send_wr->sg_list = &tx_desc->tx_sg[0]; 1037b8d26b3bSNicholas Bellinger send_wr->num_sge = isert_cmd->tx_desc.num_sge; 103895b60f07SNicholas Bellinger send_wr->send_flags = IB_SEND_SIGNALED; 1039b8d26b3bSNicholas Bellinger } 1040b8d26b3bSNicholas Bellinger 1041b8d26b3bSNicholas Bellinger static int 1042b8d26b3bSNicholas Bellinger isert_rdma_post_recvl(struct isert_conn *isert_conn) 1043b8d26b3bSNicholas Bellinger { 1044b8d26b3bSNicholas Bellinger struct ib_recv_wr rx_wr, *rx_wr_fail; 1045b8d26b3bSNicholas Bellinger struct ib_sge sge; 1046b8d26b3bSNicholas Bellinger int ret; 1047b8d26b3bSNicholas Bellinger 1048b8d26b3bSNicholas Bellinger memset(&sge, 0, sizeof(struct ib_sge)); 1049b8d26b3bSNicholas Bellinger sge.addr = isert_conn->login_req_dma; 1050b8d26b3bSNicholas Bellinger sge.length = ISER_RX_LOGIN_SIZE; 1051b8d26b3bSNicholas Bellinger sge.lkey = isert_conn->conn_mr->lkey; 1052b8d26b3bSNicholas Bellinger 1053b8d26b3bSNicholas Bellinger pr_debug("Setup sge: addr: %llx length: %d 0x%08x\n", 1054b8d26b3bSNicholas Bellinger sge.addr, sge.length, sge.lkey); 1055b8d26b3bSNicholas Bellinger 1056b8d26b3bSNicholas Bellinger memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); 1057b0a191e7SSagi Grimberg rx_wr.wr_id = (uintptr_t)isert_conn->login_req_buf; 1058b8d26b3bSNicholas Bellinger rx_wr.sg_list = &sge; 1059b8d26b3bSNicholas Bellinger rx_wr.num_sge = 1; 1060b8d26b3bSNicholas Bellinger 1061b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count++; 1062b8d26b3bSNicholas Bellinger ret = ib_post_recv(isert_conn->conn_qp, &rx_wr, &rx_wr_fail); 1063b8d26b3bSNicholas Bellinger if (ret) { 1064b8d26b3bSNicholas Bellinger pr_err("ib_post_recv() failed: %d\n", ret); 1065b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count--; 1066b8d26b3bSNicholas Bellinger } 1067b8d26b3bSNicholas Bellinger 1068b8d26b3bSNicholas Bellinger pr_debug("ib_post_recv(): returned success >>>>>>>>>>>>>>>>>>>>>>>>\n"); 1069b8d26b3bSNicholas Bellinger return ret; 1070b8d26b3bSNicholas Bellinger } 1071b8d26b3bSNicholas Bellinger 1072b8d26b3bSNicholas Bellinger static int 1073b8d26b3bSNicholas Bellinger isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, 1074b8d26b3bSNicholas Bellinger u32 length) 1075b8d26b3bSNicholas Bellinger { 1076b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = conn->context; 1077b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1078b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc = &isert_conn->conn_login_tx_desc; 1079b8d26b3bSNicholas Bellinger int ret; 1080b8d26b3bSNicholas Bellinger 1081b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, NULL, tx_desc); 1082b8d26b3bSNicholas Bellinger 1083b8d26b3bSNicholas Bellinger memcpy(&tx_desc->iscsi_header, &login->rsp[0], 1084b8d26b3bSNicholas Bellinger sizeof(struct iscsi_hdr)); 1085b8d26b3bSNicholas Bellinger 1086b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, tx_desc); 1087b8d26b3bSNicholas Bellinger 1088b8d26b3bSNicholas Bellinger if (length > 0) { 1089b8d26b3bSNicholas Bellinger struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; 1090b8d26b3bSNicholas Bellinger 1091b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, 1092b8d26b3bSNicholas Bellinger length, DMA_TO_DEVICE); 1093b8d26b3bSNicholas Bellinger 1094b8d26b3bSNicholas Bellinger memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); 1095b8d26b3bSNicholas Bellinger 1096b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, 1097b8d26b3bSNicholas Bellinger length, DMA_TO_DEVICE); 1098b8d26b3bSNicholas Bellinger 1099b8d26b3bSNicholas Bellinger tx_dsg->addr = isert_conn->login_rsp_dma; 1100b8d26b3bSNicholas Bellinger tx_dsg->length = length; 1101b8d26b3bSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 1102b8d26b3bSNicholas Bellinger tx_desc->num_sge = 2; 1103b8d26b3bSNicholas Bellinger } 1104b8d26b3bSNicholas Bellinger if (!login->login_failed) { 1105b8d26b3bSNicholas Bellinger if (login->login_complete) { 1106e0546fc1SSagi Grimberg if (!conn->sess->sess_ops->SessionType && 1107e0546fc1SSagi Grimberg isert_conn->conn_device->use_fastreg) { 1108570db170SSagi Grimberg ret = isert_conn_create_fastreg_pool(isert_conn); 1109f46d6a8aSNicholas Bellinger if (ret) { 1110f46d6a8aSNicholas Bellinger pr_err("Conn: %p failed to create" 1111f46d6a8aSNicholas Bellinger " fastreg pool\n", isert_conn); 1112f46d6a8aSNicholas Bellinger return ret; 1113f46d6a8aSNicholas Bellinger } 1114f46d6a8aSNicholas Bellinger } 1115f46d6a8aSNicholas Bellinger 1116b8d26b3bSNicholas Bellinger ret = isert_alloc_rx_descriptors(isert_conn); 1117b8d26b3bSNicholas Bellinger if (ret) 1118b8d26b3bSNicholas Bellinger return ret; 1119b8d26b3bSNicholas Bellinger 1120b8d26b3bSNicholas Bellinger ret = isert_post_recv(isert_conn, ISERT_MIN_POSTED_RX); 1121b8d26b3bSNicholas Bellinger if (ret) 1122b8d26b3bSNicholas Bellinger return ret; 1123b8d26b3bSNicholas Bellinger 1124128e9cc8SSagi Grimberg /* Now we are in FULL_FEATURE phase */ 11252371e5daSSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 1126128e9cc8SSagi Grimberg isert_conn->state = ISER_CONN_FULL_FEATURE; 11272371e5daSSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 1128b8d26b3bSNicholas Bellinger goto post_send; 1129b8d26b3bSNicholas Bellinger } 1130b8d26b3bSNicholas Bellinger 1131b8d26b3bSNicholas Bellinger ret = isert_rdma_post_recvl(isert_conn); 1132b8d26b3bSNicholas Bellinger if (ret) 1133b8d26b3bSNicholas Bellinger return ret; 1134b8d26b3bSNicholas Bellinger } 1135b8d26b3bSNicholas Bellinger post_send: 1136b8d26b3bSNicholas Bellinger ret = isert_post_send(isert_conn, tx_desc); 1137b8d26b3bSNicholas Bellinger if (ret) 1138b8d26b3bSNicholas Bellinger return ret; 1139b8d26b3bSNicholas Bellinger 1140b8d26b3bSNicholas Bellinger return 0; 1141b8d26b3bSNicholas Bellinger } 1142b8d26b3bSNicholas Bellinger 1143b8d26b3bSNicholas Bellinger static void 11442371e5daSSagi Grimberg isert_rx_login_req(struct isert_conn *isert_conn) 1145b8d26b3bSNicholas Bellinger { 11462371e5daSSagi Grimberg struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf; 11472371e5daSSagi Grimberg int rx_buflen = isert_conn->login_req_len; 1148b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1149b8d26b3bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1150b8d26b3bSNicholas Bellinger int size; 1151b8d26b3bSNicholas Bellinger 11522371e5daSSagi Grimberg pr_info("conn %p\n", isert_conn); 11532371e5daSSagi Grimberg 11542371e5daSSagi Grimberg WARN_ON_ONCE(!login); 1155b8d26b3bSNicholas Bellinger 1156b8d26b3bSNicholas Bellinger if (login->first_request) { 1157b8d26b3bSNicholas Bellinger struct iscsi_login_req *login_req = 1158b8d26b3bSNicholas Bellinger (struct iscsi_login_req *)&rx_desc->iscsi_header; 1159b8d26b3bSNicholas Bellinger /* 1160b8d26b3bSNicholas Bellinger * Setup the initial iscsi_login values from the leading 1161b8d26b3bSNicholas Bellinger * login request PDU. 1162b8d26b3bSNicholas Bellinger */ 1163b8d26b3bSNicholas Bellinger login->leading_connection = (!login_req->tsih) ? 1 : 0; 1164b8d26b3bSNicholas Bellinger login->current_stage = 1165b8d26b3bSNicholas Bellinger (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) 1166b8d26b3bSNicholas Bellinger >> 2; 1167b8d26b3bSNicholas Bellinger login->version_min = login_req->min_version; 1168b8d26b3bSNicholas Bellinger login->version_max = login_req->max_version; 1169b8d26b3bSNicholas Bellinger memcpy(login->isid, login_req->isid, 6); 1170b8d26b3bSNicholas Bellinger login->cmd_sn = be32_to_cpu(login_req->cmdsn); 1171b8d26b3bSNicholas Bellinger login->init_task_tag = login_req->itt; 1172b8d26b3bSNicholas Bellinger login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); 1173b8d26b3bSNicholas Bellinger login->cid = be16_to_cpu(login_req->cid); 1174b8d26b3bSNicholas Bellinger login->tsih = be16_to_cpu(login_req->tsih); 1175b8d26b3bSNicholas Bellinger } 1176b8d26b3bSNicholas Bellinger 1177b8d26b3bSNicholas Bellinger memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); 1178b8d26b3bSNicholas Bellinger 1179b8d26b3bSNicholas Bellinger size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); 1180b8d26b3bSNicholas Bellinger pr_debug("Using login payload size: %d, rx_buflen: %d MAX_KEY_VALUE_PAIRS: %d\n", 1181b8d26b3bSNicholas Bellinger size, rx_buflen, MAX_KEY_VALUE_PAIRS); 1182b8d26b3bSNicholas Bellinger memcpy(login->req_buf, &rx_desc->data[0], size); 1183b8d26b3bSNicholas Bellinger 11846faaa85fSNicholas Bellinger if (login->first_request) { 1185b8d26b3bSNicholas Bellinger complete(&isert_conn->conn_login_comp); 11866faaa85fSNicholas Bellinger return; 11876faaa85fSNicholas Bellinger } 11886faaa85fSNicholas Bellinger schedule_delayed_work(&conn->login_work, 0); 1189b8d26b3bSNicholas Bellinger } 1190b8d26b3bSNicholas Bellinger 1191b8d26b3bSNicholas Bellinger static struct iscsi_cmd 1192676687c6SNicholas Bellinger *isert_allocate_cmd(struct iscsi_conn *conn) 1193b8d26b3bSNicholas Bellinger { 1194b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 1195b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd; 1196d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd; 1197b8d26b3bSNicholas Bellinger 1198676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); 1199d703ce2fSNicholas Bellinger if (!cmd) { 1200d703ce2fSNicholas Bellinger pr_err("Unable to allocate iscsi_cmd + isert_cmd\n"); 1201b8d26b3bSNicholas Bellinger return NULL; 1202b8d26b3bSNicholas Bellinger } 1203d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1204b8d26b3bSNicholas Bellinger isert_cmd->conn = isert_conn; 1205d703ce2fSNicholas Bellinger isert_cmd->iscsi_cmd = cmd; 1206b8d26b3bSNicholas Bellinger 1207d703ce2fSNicholas Bellinger return cmd; 1208b8d26b3bSNicholas Bellinger } 1209b8d26b3bSNicholas Bellinger 1210b8d26b3bSNicholas Bellinger static int 1211b8d26b3bSNicholas Bellinger isert_handle_scsi_cmd(struct isert_conn *isert_conn, 1212d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, 1213d703ce2fSNicholas Bellinger struct iser_rx_desc *rx_desc, unsigned char *buf) 1214b8d26b3bSNicholas Bellinger { 1215b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1216b8d26b3bSNicholas Bellinger struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; 1217b8d26b3bSNicholas Bellinger struct scatterlist *sg; 1218b8d26b3bSNicholas Bellinger int imm_data, imm_data_len, unsol_data, sg_nents, rc; 1219b8d26b3bSNicholas Bellinger bool dump_payload = false; 1220b8d26b3bSNicholas Bellinger 1221b8d26b3bSNicholas Bellinger rc = iscsit_setup_scsi_cmd(conn, cmd, buf); 1222b8d26b3bSNicholas Bellinger if (rc < 0) 1223b8d26b3bSNicholas Bellinger return rc; 1224b8d26b3bSNicholas Bellinger 1225b8d26b3bSNicholas Bellinger imm_data = cmd->immediate_data; 1226b8d26b3bSNicholas Bellinger imm_data_len = cmd->first_burst_len; 1227b8d26b3bSNicholas Bellinger unsol_data = cmd->unsolicited_data; 1228b8d26b3bSNicholas Bellinger 1229b8d26b3bSNicholas Bellinger rc = iscsit_process_scsi_cmd(conn, cmd, hdr); 1230b8d26b3bSNicholas Bellinger if (rc < 0) { 1231b8d26b3bSNicholas Bellinger return 0; 1232b8d26b3bSNicholas Bellinger } else if (rc > 0) { 1233b8d26b3bSNicholas Bellinger dump_payload = true; 1234b8d26b3bSNicholas Bellinger goto sequence_cmd; 1235b8d26b3bSNicholas Bellinger } 1236b8d26b3bSNicholas Bellinger 1237b8d26b3bSNicholas Bellinger if (!imm_data) 1238b8d26b3bSNicholas Bellinger return 0; 1239b8d26b3bSNicholas Bellinger 1240b8d26b3bSNicholas Bellinger sg = &cmd->se_cmd.t_data_sg[0]; 1241b8d26b3bSNicholas Bellinger sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); 1242b8d26b3bSNicholas Bellinger 1243b8d26b3bSNicholas Bellinger pr_debug("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n", 1244b8d26b3bSNicholas Bellinger sg, sg_nents, &rx_desc->data[0], imm_data_len); 1245b8d26b3bSNicholas Bellinger 1246b8d26b3bSNicholas Bellinger sg_copy_from_buffer(sg, sg_nents, &rx_desc->data[0], imm_data_len); 1247b8d26b3bSNicholas Bellinger 1248b8d26b3bSNicholas Bellinger cmd->write_data_done += imm_data_len; 1249b8d26b3bSNicholas Bellinger 1250b8d26b3bSNicholas Bellinger if (cmd->write_data_done == cmd->se_cmd.data_length) { 1251b8d26b3bSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 1252b8d26b3bSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 1253b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 1254b8d26b3bSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 1255b8d26b3bSNicholas Bellinger } 1256b8d26b3bSNicholas Bellinger 1257b8d26b3bSNicholas Bellinger sequence_cmd: 1258561bf158SNicholas Bellinger rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); 1259b8d26b3bSNicholas Bellinger 1260b8d26b3bSNicholas Bellinger if (!rc && dump_payload == false && unsol_data) 1261b8d26b3bSNicholas Bellinger iscsit_set_unsoliticed_dataout(cmd); 12626cc44a6fSNicholas Bellinger else if (dump_payload && imm_data) 12636cc44a6fSNicholas Bellinger target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); 1264b8d26b3bSNicholas Bellinger 1265b8d26b3bSNicholas Bellinger return 0; 1266b8d26b3bSNicholas Bellinger } 1267b8d26b3bSNicholas Bellinger 1268b8d26b3bSNicholas Bellinger static int 1269b8d26b3bSNicholas Bellinger isert_handle_iscsi_dataout(struct isert_conn *isert_conn, 1270b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc, unsigned char *buf) 1271b8d26b3bSNicholas Bellinger { 1272b8d26b3bSNicholas Bellinger struct scatterlist *sg_start; 1273b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1274b8d26b3bSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 1275b8d26b3bSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *)buf; 1276b8d26b3bSNicholas Bellinger u32 unsol_data_len = ntoh24(hdr->dlength); 1277b8d26b3bSNicholas Bellinger int rc, sg_nents, sg_off, page_off; 1278b8d26b3bSNicholas Bellinger 1279b8d26b3bSNicholas Bellinger rc = iscsit_check_dataout_hdr(conn, buf, &cmd); 1280b8d26b3bSNicholas Bellinger if (rc < 0) 1281b8d26b3bSNicholas Bellinger return rc; 1282b8d26b3bSNicholas Bellinger else if (!cmd) 1283b8d26b3bSNicholas Bellinger return 0; 1284b8d26b3bSNicholas Bellinger /* 1285b8d26b3bSNicholas Bellinger * FIXME: Unexpected unsolicited_data out 1286b8d26b3bSNicholas Bellinger */ 1287b8d26b3bSNicholas Bellinger if (!cmd->unsolicited_data) { 1288b8d26b3bSNicholas Bellinger pr_err("Received unexpected solicited data payload\n"); 1289b8d26b3bSNicholas Bellinger dump_stack(); 1290b8d26b3bSNicholas Bellinger return -1; 1291b8d26b3bSNicholas Bellinger } 1292b8d26b3bSNicholas Bellinger 1293b8d26b3bSNicholas Bellinger pr_debug("Unsolicited DataOut unsol_data_len: %u, write_data_done: %u, data_length: %u\n", 1294b8d26b3bSNicholas Bellinger unsol_data_len, cmd->write_data_done, cmd->se_cmd.data_length); 1295b8d26b3bSNicholas Bellinger 1296b8d26b3bSNicholas Bellinger sg_off = cmd->write_data_done / PAGE_SIZE; 1297b8d26b3bSNicholas Bellinger sg_start = &cmd->se_cmd.t_data_sg[sg_off]; 1298b8d26b3bSNicholas Bellinger sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); 1299b8d26b3bSNicholas Bellinger page_off = cmd->write_data_done % PAGE_SIZE; 1300b8d26b3bSNicholas Bellinger /* 1301b8d26b3bSNicholas Bellinger * FIXME: Non page-aligned unsolicited_data out 1302b8d26b3bSNicholas Bellinger */ 1303b8d26b3bSNicholas Bellinger if (page_off) { 1304b8d26b3bSNicholas Bellinger pr_err("Received unexpected non-page aligned data payload\n"); 1305b8d26b3bSNicholas Bellinger dump_stack(); 1306b8d26b3bSNicholas Bellinger return -1; 1307b8d26b3bSNicholas Bellinger } 1308b8d26b3bSNicholas Bellinger pr_debug("Copying DataOut: sg_start: %p, sg_off: %u sg_nents: %u from %p %u\n", 1309b8d26b3bSNicholas Bellinger sg_start, sg_off, sg_nents, &rx_desc->data[0], unsol_data_len); 1310b8d26b3bSNicholas Bellinger 1311b8d26b3bSNicholas Bellinger sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], 1312b8d26b3bSNicholas Bellinger unsol_data_len); 1313b8d26b3bSNicholas Bellinger 1314b8d26b3bSNicholas Bellinger rc = iscsit_check_dataout_payload(cmd, hdr, false); 1315b8d26b3bSNicholas Bellinger if (rc < 0) 1316b8d26b3bSNicholas Bellinger return rc; 1317b8d26b3bSNicholas Bellinger 1318b8d26b3bSNicholas Bellinger return 0; 1319b8d26b3bSNicholas Bellinger } 1320b8d26b3bSNicholas Bellinger 1321b8d26b3bSNicholas Bellinger static int 1322778de368SNicholas Bellinger isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1323d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, 1324d703ce2fSNicholas Bellinger unsigned char *buf) 1325778de368SNicholas Bellinger { 1326778de368SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1327778de368SNicholas Bellinger struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; 1328778de368SNicholas Bellinger int rc; 1329778de368SNicholas Bellinger 1330778de368SNicholas Bellinger rc = iscsit_setup_nop_out(conn, cmd, hdr); 1331778de368SNicholas Bellinger if (rc < 0) 1332778de368SNicholas Bellinger return rc; 1333778de368SNicholas Bellinger /* 1334778de368SNicholas Bellinger * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload 1335778de368SNicholas Bellinger */ 1336778de368SNicholas Bellinger 1337778de368SNicholas Bellinger return iscsit_process_nop_out(conn, cmd, hdr); 1338778de368SNicholas Bellinger } 1339778de368SNicholas Bellinger 1340778de368SNicholas Bellinger static int 1341adb54c29SNicholas Bellinger isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1342d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, 1343d703ce2fSNicholas Bellinger struct iscsi_text *hdr) 1344adb54c29SNicholas Bellinger { 1345adb54c29SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1346adb54c29SNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 1347adb54c29SNicholas Bellinger int rc; 1348adb54c29SNicholas Bellinger unsigned char *text_in; 1349adb54c29SNicholas Bellinger 1350adb54c29SNicholas Bellinger rc = iscsit_setup_text_cmd(conn, cmd, hdr); 1351adb54c29SNicholas Bellinger if (rc < 0) 1352adb54c29SNicholas Bellinger return rc; 1353adb54c29SNicholas Bellinger 1354adb54c29SNicholas Bellinger text_in = kzalloc(payload_length, GFP_KERNEL); 1355adb54c29SNicholas Bellinger if (!text_in) { 1356adb54c29SNicholas Bellinger pr_err("Unable to allocate text_in of payload_length: %u\n", 1357adb54c29SNicholas Bellinger payload_length); 1358adb54c29SNicholas Bellinger return -ENOMEM; 1359adb54c29SNicholas Bellinger } 1360adb54c29SNicholas Bellinger cmd->text_in_ptr = text_in; 1361adb54c29SNicholas Bellinger 1362adb54c29SNicholas Bellinger memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); 1363adb54c29SNicholas Bellinger 1364adb54c29SNicholas Bellinger return iscsit_process_text_cmd(conn, cmd, hdr); 1365adb54c29SNicholas Bellinger } 1366adb54c29SNicholas Bellinger 1367adb54c29SNicholas Bellinger static int 1368b8d26b3bSNicholas Bellinger isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, 1369b8d26b3bSNicholas Bellinger uint32_t read_stag, uint64_t read_va, 1370b8d26b3bSNicholas Bellinger uint32_t write_stag, uint64_t write_va) 1371b8d26b3bSNicholas Bellinger { 1372b8d26b3bSNicholas Bellinger struct iscsi_hdr *hdr = &rx_desc->iscsi_header; 1373b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1374ca40d24eSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1375b8d26b3bSNicholas Bellinger struct iscsi_cmd *cmd; 1376b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd; 1377b8d26b3bSNicholas Bellinger int ret = -EINVAL; 1378b8d26b3bSNicholas Bellinger u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); 1379b8d26b3bSNicholas Bellinger 1380ca40d24eSNicholas Bellinger if (sess->sess_ops->SessionType && 1381ca40d24eSNicholas Bellinger (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { 1382ca40d24eSNicholas Bellinger pr_err("Got illegal opcode: 0x%02x in SessionType=Discovery," 1383ca40d24eSNicholas Bellinger " ignoring\n", opcode); 1384ca40d24eSNicholas Bellinger return 0; 1385ca40d24eSNicholas Bellinger } 1386ca40d24eSNicholas Bellinger 1387b8d26b3bSNicholas Bellinger switch (opcode) { 1388b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 1389676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1390b8d26b3bSNicholas Bellinger if (!cmd) 1391b8d26b3bSNicholas Bellinger break; 1392b8d26b3bSNicholas Bellinger 1393d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1394b8d26b3bSNicholas Bellinger isert_cmd->read_stag = read_stag; 1395b8d26b3bSNicholas Bellinger isert_cmd->read_va = read_va; 1396b8d26b3bSNicholas Bellinger isert_cmd->write_stag = write_stag; 1397b8d26b3bSNicholas Bellinger isert_cmd->write_va = write_va; 1398b8d26b3bSNicholas Bellinger 1399d703ce2fSNicholas Bellinger ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, 1400b8d26b3bSNicholas Bellinger rx_desc, (unsigned char *)hdr); 1401b8d26b3bSNicholas Bellinger break; 1402b8d26b3bSNicholas Bellinger case ISCSI_OP_NOOP_OUT: 1403676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1404b8d26b3bSNicholas Bellinger if (!cmd) 1405b8d26b3bSNicholas Bellinger break; 1406b8d26b3bSNicholas Bellinger 1407d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1408d703ce2fSNicholas Bellinger ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, 1409778de368SNicholas Bellinger rx_desc, (unsigned char *)hdr); 1410b8d26b3bSNicholas Bellinger break; 1411b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_DATA_OUT: 1412b8d26b3bSNicholas Bellinger ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, 1413b8d26b3bSNicholas Bellinger (unsigned char *)hdr); 1414b8d26b3bSNicholas Bellinger break; 1415b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 1416676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1417b8d26b3bSNicholas Bellinger if (!cmd) 1418b8d26b3bSNicholas Bellinger break; 1419b8d26b3bSNicholas Bellinger 1420b8d26b3bSNicholas Bellinger ret = iscsit_handle_task_mgt_cmd(conn, cmd, 1421b8d26b3bSNicholas Bellinger (unsigned char *)hdr); 1422b8d26b3bSNicholas Bellinger break; 1423b8d26b3bSNicholas Bellinger case ISCSI_OP_LOGOUT: 1424676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1425b8d26b3bSNicholas Bellinger if (!cmd) 1426b8d26b3bSNicholas Bellinger break; 1427b8d26b3bSNicholas Bellinger 1428b8d26b3bSNicholas Bellinger ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); 1429b8d26b3bSNicholas Bellinger if (ret > 0) 1430b8d26b3bSNicholas Bellinger wait_for_completion_timeout(&conn->conn_logout_comp, 1431b8d26b3bSNicholas Bellinger SECONDS_FOR_LOGOUT_COMP * 1432b8d26b3bSNicholas Bellinger HZ); 1433b8d26b3bSNicholas Bellinger break; 1434adb54c29SNicholas Bellinger case ISCSI_OP_TEXT: 1435676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1436adb54c29SNicholas Bellinger if (!cmd) 1437adb54c29SNicholas Bellinger break; 1438adb54c29SNicholas Bellinger 1439d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1440d703ce2fSNicholas Bellinger ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, 1441adb54c29SNicholas Bellinger rx_desc, (struct iscsi_text *)hdr); 1442adb54c29SNicholas Bellinger break; 1443b8d26b3bSNicholas Bellinger default: 1444b8d26b3bSNicholas Bellinger pr_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); 1445b8d26b3bSNicholas Bellinger dump_stack(); 1446b8d26b3bSNicholas Bellinger break; 1447b8d26b3bSNicholas Bellinger } 1448b8d26b3bSNicholas Bellinger 1449b8d26b3bSNicholas Bellinger return ret; 1450b8d26b3bSNicholas Bellinger } 1451b8d26b3bSNicholas Bellinger 1452b8d26b3bSNicholas Bellinger static void 1453b8d26b3bSNicholas Bellinger isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) 1454b8d26b3bSNicholas Bellinger { 1455b8d26b3bSNicholas Bellinger struct iser_hdr *iser_hdr = &rx_desc->iser_header; 1456b8d26b3bSNicholas Bellinger uint64_t read_va = 0, write_va = 0; 1457b8d26b3bSNicholas Bellinger uint32_t read_stag = 0, write_stag = 0; 1458b8d26b3bSNicholas Bellinger int rc; 1459b8d26b3bSNicholas Bellinger 1460b8d26b3bSNicholas Bellinger switch (iser_hdr->flags & 0xF0) { 1461b8d26b3bSNicholas Bellinger case ISCSI_CTRL: 1462b8d26b3bSNicholas Bellinger if (iser_hdr->flags & ISER_RSV) { 1463b8d26b3bSNicholas Bellinger read_stag = be32_to_cpu(iser_hdr->read_stag); 1464b8d26b3bSNicholas Bellinger read_va = be64_to_cpu(iser_hdr->read_va); 1465b8d26b3bSNicholas Bellinger pr_debug("ISER_RSV: read_stag: 0x%08x read_va: 0x%16llx\n", 1466b8d26b3bSNicholas Bellinger read_stag, (unsigned long long)read_va); 1467b8d26b3bSNicholas Bellinger } 1468b8d26b3bSNicholas Bellinger if (iser_hdr->flags & ISER_WSV) { 1469b8d26b3bSNicholas Bellinger write_stag = be32_to_cpu(iser_hdr->write_stag); 1470b8d26b3bSNicholas Bellinger write_va = be64_to_cpu(iser_hdr->write_va); 1471b8d26b3bSNicholas Bellinger pr_debug("ISER_WSV: write__stag: 0x%08x write_va: 0x%16llx\n", 1472b8d26b3bSNicholas Bellinger write_stag, (unsigned long long)write_va); 1473b8d26b3bSNicholas Bellinger } 1474b8d26b3bSNicholas Bellinger 1475b8d26b3bSNicholas Bellinger pr_debug("ISER ISCSI_CTRL PDU\n"); 1476b8d26b3bSNicholas Bellinger break; 1477b8d26b3bSNicholas Bellinger case ISER_HELLO: 1478b8d26b3bSNicholas Bellinger pr_err("iSER Hello message\n"); 1479b8d26b3bSNicholas Bellinger break; 1480b8d26b3bSNicholas Bellinger default: 1481b8d26b3bSNicholas Bellinger pr_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags); 1482b8d26b3bSNicholas Bellinger break; 1483b8d26b3bSNicholas Bellinger } 1484b8d26b3bSNicholas Bellinger 1485b8d26b3bSNicholas Bellinger rc = isert_rx_opcode(isert_conn, rx_desc, 1486b8d26b3bSNicholas Bellinger read_stag, read_va, write_stag, write_va); 1487b8d26b3bSNicholas Bellinger } 1488b8d26b3bSNicholas Bellinger 1489b8d26b3bSNicholas Bellinger static void 1490b8d26b3bSNicholas Bellinger isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn, 14914a295baeSSagi Grimberg u32 xfer_len) 1492b8d26b3bSNicholas Bellinger { 1493b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1494b8d26b3bSNicholas Bellinger struct iscsi_hdr *hdr; 1495b8d26b3bSNicholas Bellinger u64 rx_dma; 1496b8d26b3bSNicholas Bellinger int rx_buflen, outstanding; 1497b8d26b3bSNicholas Bellinger 1498b8d26b3bSNicholas Bellinger if ((char *)desc == isert_conn->login_req_buf) { 1499b8d26b3bSNicholas Bellinger rx_dma = isert_conn->login_req_dma; 1500b8d26b3bSNicholas Bellinger rx_buflen = ISER_RX_LOGIN_SIZE; 1501b8d26b3bSNicholas Bellinger pr_debug("ISER login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", 1502b8d26b3bSNicholas Bellinger rx_dma, rx_buflen); 1503b8d26b3bSNicholas Bellinger } else { 1504b8d26b3bSNicholas Bellinger rx_dma = desc->dma_addr; 1505b8d26b3bSNicholas Bellinger rx_buflen = ISER_RX_PAYLOAD_SIZE; 1506b8d26b3bSNicholas Bellinger pr_debug("ISER req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", 1507b8d26b3bSNicholas Bellinger rx_dma, rx_buflen); 1508b8d26b3bSNicholas Bellinger } 1509b8d26b3bSNicholas Bellinger 1510b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); 1511b8d26b3bSNicholas Bellinger 1512b8d26b3bSNicholas Bellinger hdr = &desc->iscsi_header; 1513b8d26b3bSNicholas Bellinger pr_debug("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", 1514b8d26b3bSNicholas Bellinger hdr->opcode, hdr->itt, hdr->flags, 1515b8d26b3bSNicholas Bellinger (int)(xfer_len - ISER_HEADERS_LEN)); 1516b8d26b3bSNicholas Bellinger 15172371e5daSSagi Grimberg if ((char *)desc == isert_conn->login_req_buf) { 15182371e5daSSagi Grimberg isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN; 15192371e5daSSagi Grimberg if (isert_conn->conn) { 15202371e5daSSagi Grimberg struct iscsi_login *login = isert_conn->conn->conn_login; 15212371e5daSSagi Grimberg 15222371e5daSSagi Grimberg if (login && !login->first_request) 15232371e5daSSagi Grimberg isert_rx_login_req(isert_conn); 15242371e5daSSagi Grimberg } 15252371e5daSSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 15262371e5daSSagi Grimberg complete(&isert_conn->login_req_comp); 15272371e5daSSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 15282371e5daSSagi Grimberg } else { 1529b8d26b3bSNicholas Bellinger isert_rx_do_work(desc, isert_conn); 15302371e5daSSagi Grimberg } 1531b8d26b3bSNicholas Bellinger 1532b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, 1533b8d26b3bSNicholas Bellinger DMA_FROM_DEVICE); 1534b8d26b3bSNicholas Bellinger 1535b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count--; 1536b8d26b3bSNicholas Bellinger pr_debug("iSERT: Decremented post_recv_buf_count: %d\n", 1537b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count); 1538b8d26b3bSNicholas Bellinger 1539b8d26b3bSNicholas Bellinger if ((char *)desc == isert_conn->login_req_buf) 1540b8d26b3bSNicholas Bellinger return; 1541b8d26b3bSNicholas Bellinger 1542b8d26b3bSNicholas Bellinger outstanding = isert_conn->post_recv_buf_count; 1543b8d26b3bSNicholas Bellinger if (outstanding + ISERT_MIN_POSTED_RX <= ISERT_QP_MAX_RECV_DTOS) { 1544b8d26b3bSNicholas Bellinger int err, count = min(ISERT_QP_MAX_RECV_DTOS - outstanding, 1545b8d26b3bSNicholas Bellinger ISERT_MIN_POSTED_RX); 1546b8d26b3bSNicholas Bellinger err = isert_post_recv(isert_conn, count); 1547b8d26b3bSNicholas Bellinger if (err) { 1548b8d26b3bSNicholas Bellinger pr_err("isert_post_recv() count: %d failed, %d\n", 1549b8d26b3bSNicholas Bellinger count, err); 1550b8d26b3bSNicholas Bellinger } 1551b8d26b3bSNicholas Bellinger } 1552b8d26b3bSNicholas Bellinger } 1553b8d26b3bSNicholas Bellinger 1554e3d7e4c3SSagi Grimberg static int 1555e3d7e4c3SSagi Grimberg isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1556e3d7e4c3SSagi Grimberg struct scatterlist *sg, u32 nents, u32 length, u32 offset, 1557e3d7e4c3SSagi Grimberg enum iser_ib_op_code op, struct isert_data_buf *data) 1558e3d7e4c3SSagi Grimberg { 1559e3d7e4c3SSagi Grimberg struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1560e3d7e4c3SSagi Grimberg 1561e3d7e4c3SSagi Grimberg data->dma_dir = op == ISER_IB_RDMA_WRITE ? 1562e3d7e4c3SSagi Grimberg DMA_TO_DEVICE : DMA_FROM_DEVICE; 1563e3d7e4c3SSagi Grimberg 1564e3d7e4c3SSagi Grimberg data->len = length - offset; 1565e3d7e4c3SSagi Grimberg data->offset = offset; 1566e3d7e4c3SSagi Grimberg data->sg_off = data->offset / PAGE_SIZE; 1567e3d7e4c3SSagi Grimberg 1568e3d7e4c3SSagi Grimberg data->sg = &sg[data->sg_off]; 1569e3d7e4c3SSagi Grimberg data->nents = min_t(unsigned int, nents - data->sg_off, 1570e3d7e4c3SSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 1571e3d7e4c3SSagi Grimberg data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * 1572e3d7e4c3SSagi Grimberg PAGE_SIZE); 1573e3d7e4c3SSagi Grimberg 1574e3d7e4c3SSagi Grimberg data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, 1575e3d7e4c3SSagi Grimberg data->dma_dir); 1576e3d7e4c3SSagi Grimberg if (unlikely(!data->dma_nents)) { 1577e3d7e4c3SSagi Grimberg pr_err("Cmd: unable to dma map SGs %p\n", sg); 1578e3d7e4c3SSagi Grimberg return -EINVAL; 1579e3d7e4c3SSagi Grimberg } 1580e3d7e4c3SSagi Grimberg 1581e3d7e4c3SSagi Grimberg pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", 1582e3d7e4c3SSagi Grimberg isert_cmd, data->dma_nents, data->sg, data->nents, data->len); 1583e3d7e4c3SSagi Grimberg 1584e3d7e4c3SSagi Grimberg return 0; 1585e3d7e4c3SSagi Grimberg } 1586e3d7e4c3SSagi Grimberg 1587e3d7e4c3SSagi Grimberg static void 1588e3d7e4c3SSagi Grimberg isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) 1589e3d7e4c3SSagi Grimberg { 1590e3d7e4c3SSagi Grimberg struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1591e3d7e4c3SSagi Grimberg 1592e3d7e4c3SSagi Grimberg ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); 1593e3d7e4c3SSagi Grimberg memset(data, 0, sizeof(*data)); 1594e3d7e4c3SSagi Grimberg } 1595e3d7e4c3SSagi Grimberg 1596e3d7e4c3SSagi Grimberg 1597e3d7e4c3SSagi Grimberg 1598b8d26b3bSNicholas Bellinger static void 1599b8d26b3bSNicholas Bellinger isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) 1600b8d26b3bSNicholas Bellinger { 1601b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 1602b8d26b3bSNicholas Bellinger 160390ecc6e2SVu Pham pr_debug("isert_unmap_cmd: %p\n", isert_cmd); 1604e3d7e4c3SSagi Grimberg 1605e3d7e4c3SSagi Grimberg if (wr->data.sg) { 160690ecc6e2SVu Pham pr_debug("isert_unmap_cmd: %p unmap_sg op\n", isert_cmd); 1607e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 1608b8d26b3bSNicholas Bellinger } 1609b8d26b3bSNicholas Bellinger 161090ecc6e2SVu Pham if (wr->send_wr) { 161190ecc6e2SVu Pham pr_debug("isert_unmap_cmd: %p free send_wr\n", isert_cmd); 1612b8d26b3bSNicholas Bellinger kfree(wr->send_wr); 1613b8d26b3bSNicholas Bellinger wr->send_wr = NULL; 161490ecc6e2SVu Pham } 1615b8d26b3bSNicholas Bellinger 161690ecc6e2SVu Pham if (wr->ib_sge) { 161790ecc6e2SVu Pham pr_debug("isert_unmap_cmd: %p free ib_sge\n", isert_cmd); 161890ecc6e2SVu Pham kfree(wr->ib_sge); 161990ecc6e2SVu Pham wr->ib_sge = NULL; 162090ecc6e2SVu Pham } 1621b8d26b3bSNicholas Bellinger } 1622b8d26b3bSNicholas Bellinger 1623b8d26b3bSNicholas Bellinger static void 1624a3a5a826SSagi Grimberg isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) 162559464ef4SVu Pham { 162659464ef4SVu Pham struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 162759464ef4SVu Pham LIST_HEAD(unmap_list); 162859464ef4SVu Pham 1629a3a5a826SSagi Grimberg pr_debug("unreg_fastreg_cmd: %p\n", isert_cmd); 163059464ef4SVu Pham 163159464ef4SVu Pham if (wr->fr_desc) { 1632a3a5a826SSagi Grimberg pr_debug("unreg_fastreg_cmd: %p free fr_desc %p\n", 163359464ef4SVu Pham isert_cmd, wr->fr_desc); 16349e961ae7SSagi Grimberg if (wr->fr_desc->ind & ISERT_PROTECTED) { 16359e961ae7SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->prot); 16369e961ae7SSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 16379e961ae7SSagi Grimberg } 163859464ef4SVu Pham spin_lock_bh(&isert_conn->conn_lock); 1639a3a5a826SSagi Grimberg list_add_tail(&wr->fr_desc->list, &isert_conn->conn_fr_pool); 164059464ef4SVu Pham spin_unlock_bh(&isert_conn->conn_lock); 164159464ef4SVu Pham wr->fr_desc = NULL; 164259464ef4SVu Pham } 164359464ef4SVu Pham 1644e3d7e4c3SSagi Grimberg if (wr->data.sg) { 1645a3a5a826SSagi Grimberg pr_debug("unreg_fastreg_cmd: %p unmap_sg op\n", isert_cmd); 1646e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 164759464ef4SVu Pham } 164859464ef4SVu Pham 164959464ef4SVu Pham wr->ib_sge = NULL; 165059464ef4SVu Pham wr->send_wr = NULL; 165159464ef4SVu Pham } 165259464ef4SVu Pham 165359464ef4SVu Pham static void 165403e7848aSNicholas Bellinger isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) 1655b8d26b3bSNicholas Bellinger { 1656d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1657b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = isert_cmd->conn; 1658186a9647SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1659d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 1660b8d26b3bSNicholas Bellinger 1661b8d26b3bSNicholas Bellinger pr_debug("Entering isert_put_cmd: %p\n", isert_cmd); 1662b8d26b3bSNicholas Bellinger 1663b8d26b3bSNicholas Bellinger switch (cmd->iscsi_opcode) { 1664b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 1665b8d26b3bSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1666b8d26b3bSNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 16675159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1668b8d26b3bSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1669b8d26b3bSNicholas Bellinger 167003e7848aSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 1671b8d26b3bSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 167203e7848aSNicholas Bellinger /* 167303e7848aSNicholas Bellinger * Check for special case during comp_err where 167403e7848aSNicholas Bellinger * WRITE_PENDING has been handed off from core, 167503e7848aSNicholas Bellinger * but requires an extra target_put_sess_cmd() 167603e7848aSNicholas Bellinger * before transport_generic_free_cmd() below. 167703e7848aSNicholas Bellinger */ 167803e7848aSNicholas Bellinger if (comp_err && 167903e7848aSNicholas Bellinger cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { 168003e7848aSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 168103e7848aSNicholas Bellinger 168203e7848aSNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 168303e7848aSNicholas Bellinger } 168403e7848aSNicholas Bellinger } 1685b8d26b3bSNicholas Bellinger 1686d40945d8SVu Pham device->unreg_rdma_mem(isert_cmd, isert_conn); 1687186a9647SNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1688186a9647SNicholas Bellinger break; 1689b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 1690186a9647SNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1691186a9647SNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 16925159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1693186a9647SNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1694186a9647SNicholas Bellinger 1695b8d26b3bSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1696b8d26b3bSNicholas Bellinger break; 1697b8d26b3bSNicholas Bellinger case ISCSI_OP_REJECT: 1698b8d26b3bSNicholas Bellinger case ISCSI_OP_NOOP_OUT: 1699adb54c29SNicholas Bellinger case ISCSI_OP_TEXT: 1700b8d26b3bSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1701b8d26b3bSNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 17025159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1703b8d26b3bSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1704b8d26b3bSNicholas Bellinger 1705b8d26b3bSNicholas Bellinger /* 1706b8d26b3bSNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 1707b8d26b3bSNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 1708b8d26b3bSNicholas Bellinger * associated cmd->se_cmd needs to be released. 1709b8d26b3bSNicholas Bellinger */ 1710b8d26b3bSNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 17113df8f68aSNicholas Bellinger pr_debug("Calling transport_generic_free_cmd from" 17123df8f68aSNicholas Bellinger " isert_put_cmd for 0x%02x\n", 17133df8f68aSNicholas Bellinger cmd->iscsi_opcode); 1714b8d26b3bSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1715b8d26b3bSNicholas Bellinger break; 1716b8d26b3bSNicholas Bellinger } 1717b8d26b3bSNicholas Bellinger /* 1718b8d26b3bSNicholas Bellinger * Fall-through 1719b8d26b3bSNicholas Bellinger */ 1720b8d26b3bSNicholas Bellinger default: 1721d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 1722b8d26b3bSNicholas Bellinger break; 1723b8d26b3bSNicholas Bellinger } 1724b8d26b3bSNicholas Bellinger } 1725b8d26b3bSNicholas Bellinger 1726b8d26b3bSNicholas Bellinger static void 1727b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) 1728b8d26b3bSNicholas Bellinger { 1729b8d26b3bSNicholas Bellinger if (tx_desc->dma_addr != 0) { 1730b8d26b3bSNicholas Bellinger pr_debug("Calling ib_dma_unmap_single for tx_desc->dma_addr\n"); 1731b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, 1732b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 1733b8d26b3bSNicholas Bellinger tx_desc->dma_addr = 0; 1734b8d26b3bSNicholas Bellinger } 1735b8d26b3bSNicholas Bellinger } 1736b8d26b3bSNicholas Bellinger 1737b8d26b3bSNicholas Bellinger static void 1738b8d26b3bSNicholas Bellinger isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, 173903e7848aSNicholas Bellinger struct ib_device *ib_dev, bool comp_err) 1740b8d26b3bSNicholas Bellinger { 1741dbbc5d11SNicholas Bellinger if (isert_cmd->pdu_buf_dma != 0) { 1742dbbc5d11SNicholas Bellinger pr_debug("Calling ib_dma_unmap_single for isert_cmd->pdu_buf_dma\n"); 1743dbbc5d11SNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, 1744dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len, DMA_TO_DEVICE); 1745dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = 0; 1746b8d26b3bSNicholas Bellinger } 1747b8d26b3bSNicholas Bellinger 1748b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 174903e7848aSNicholas Bellinger isert_put_cmd(isert_cmd, comp_err); 1750b8d26b3bSNicholas Bellinger } 1751b8d26b3bSNicholas Bellinger 175296b7973eSSagi Grimberg static int 175396b7973eSSagi Grimberg isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) 1754f93f3a70SSagi Grimberg { 17559e961ae7SSagi Grimberg struct ib_mr_status mr_status; 175696b7973eSSagi Grimberg int ret; 1757f93f3a70SSagi Grimberg 175896b7973eSSagi Grimberg ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); 17599e961ae7SSagi Grimberg if (ret) { 17609e961ae7SSagi Grimberg pr_err("ib_check_mr_status failed, ret %d\n", ret); 17619e961ae7SSagi Grimberg goto fail_mr_status; 17629e961ae7SSagi Grimberg } 176396b7973eSSagi Grimberg 17649e961ae7SSagi Grimberg if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { 176596b7973eSSagi Grimberg u64 sec_offset_err; 17669e961ae7SSagi Grimberg u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; 17679e961ae7SSagi Grimberg 17689e961ae7SSagi Grimberg switch (mr_status.sig_err.err_type) { 17699e961ae7SSagi Grimberg case IB_SIG_BAD_GUARD: 17709e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 17719e961ae7SSagi Grimberg break; 17729e961ae7SSagi Grimberg case IB_SIG_BAD_REFTAG: 17739e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 17749e961ae7SSagi Grimberg break; 17759e961ae7SSagi Grimberg case IB_SIG_BAD_APPTAG: 17769e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 17779e961ae7SSagi Grimberg break; 17789e961ae7SSagi Grimberg } 177996b7973eSSagi Grimberg sec_offset_err = mr_status.sig_err.sig_err_offset; 178096b7973eSSagi Grimberg do_div(sec_offset_err, block_size); 178196b7973eSSagi Grimberg se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; 17829e961ae7SSagi Grimberg 17839e961ae7SSagi Grimberg pr_err("isert: PI error found type %d at sector 0x%llx " 17849e961ae7SSagi Grimberg "expected 0x%x vs actual 0x%x\n", 17859e961ae7SSagi Grimberg mr_status.sig_err.err_type, 17869e961ae7SSagi Grimberg (unsigned long long)se_cmd->bad_sector, 17879e961ae7SSagi Grimberg mr_status.sig_err.expected, 17889e961ae7SSagi Grimberg mr_status.sig_err.actual); 17899e961ae7SSagi Grimberg ret = 1; 17909e961ae7SSagi Grimberg } 17919e961ae7SSagi Grimberg 17929e961ae7SSagi Grimberg fail_mr_status: 179396b7973eSSagi Grimberg return ret; 179496b7973eSSagi Grimberg } 179596b7973eSSagi Grimberg 179696b7973eSSagi Grimberg static void 179796b7973eSSagi Grimberg isert_completion_rdma_write(struct iser_tx_desc *tx_desc, 179896b7973eSSagi Grimberg struct isert_cmd *isert_cmd) 179996b7973eSSagi Grimberg { 180096b7973eSSagi Grimberg struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 180196b7973eSSagi Grimberg struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 180296b7973eSSagi Grimberg struct se_cmd *se_cmd = &cmd->se_cmd; 180396b7973eSSagi Grimberg struct isert_conn *isert_conn = isert_cmd->conn; 180496b7973eSSagi Grimberg struct isert_device *device = isert_conn->conn_device; 180596b7973eSSagi Grimberg int ret = 0; 180696b7973eSSagi Grimberg 180796b7973eSSagi Grimberg if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { 180896b7973eSSagi Grimberg ret = isert_check_pi_status(se_cmd, 180996b7973eSSagi Grimberg wr->fr_desc->pi_ctx->sig_mr); 181096b7973eSSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 181196b7973eSSagi Grimberg } 181296b7973eSSagi Grimberg 1813f93f3a70SSagi Grimberg device->unreg_rdma_mem(isert_cmd, isert_conn); 1814897bb2c9SSagi Grimberg wr->send_wr_num = 0; 18159e961ae7SSagi Grimberg if (ret) 18169e961ae7SSagi Grimberg transport_send_check_condition_and_sense(se_cmd, 18179e961ae7SSagi Grimberg se_cmd->pi_err, 0); 18189e961ae7SSagi Grimberg else 1819f93f3a70SSagi Grimberg isert_put_response(isert_conn->conn, cmd); 1820f93f3a70SSagi Grimberg } 1821f93f3a70SSagi Grimberg 1822f93f3a70SSagi Grimberg static void 1823b8d26b3bSNicholas Bellinger isert_completion_rdma_read(struct iser_tx_desc *tx_desc, 1824b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd) 1825b8d26b3bSNicholas Bellinger { 1826b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 1827d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1828b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 182990ecc6e2SVu Pham struct isert_conn *isert_conn = isert_cmd->conn; 1830d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 18315bac4b1aSSagi Grimberg int ret = 0; 1832b8d26b3bSNicholas Bellinger 18339e961ae7SSagi Grimberg if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { 183496b7973eSSagi Grimberg ret = isert_check_pi_status(se_cmd, 183596b7973eSSagi Grimberg wr->fr_desc->pi_ctx->sig_mr); 183696b7973eSSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 18379e961ae7SSagi Grimberg } 18389e961ae7SSagi Grimberg 1839b8d26b3bSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 1840d40945d8SVu Pham device->unreg_rdma_mem(isert_cmd, isert_conn); 1841e3d7e4c3SSagi Grimberg cmd->write_data_done = wr->data.len; 1842b6b87a1dSNicholas Bellinger wr->send_wr_num = 0; 1843b8d26b3bSNicholas Bellinger 184490ecc6e2SVu Pham pr_debug("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); 1845b8d26b3bSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 1846b8d26b3bSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 1847b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 1848b8d26b3bSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 1849b8d26b3bSNicholas Bellinger 18505bac4b1aSSagi Grimberg if (ret) 18515bac4b1aSSagi Grimberg transport_send_check_condition_and_sense(se_cmd, 18525bac4b1aSSagi Grimberg se_cmd->pi_err, 0); 18535bac4b1aSSagi Grimberg else 1854b8d26b3bSNicholas Bellinger target_execute_cmd(se_cmd); 1855b8d26b3bSNicholas Bellinger } 1856b8d26b3bSNicholas Bellinger 1857b8d26b3bSNicholas Bellinger static void 1858b8d26b3bSNicholas Bellinger isert_do_control_comp(struct work_struct *work) 1859b8d26b3bSNicholas Bellinger { 1860b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd = container_of(work, 1861b8d26b3bSNicholas Bellinger struct isert_cmd, comp_work); 1862b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = isert_cmd->conn; 1863b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1864d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1865b8d26b3bSNicholas Bellinger 1866b8d26b3bSNicholas Bellinger switch (cmd->i_state) { 1867b8d26b3bSNicholas Bellinger case ISTATE_SEND_TASKMGTRSP: 1868b8d26b3bSNicholas Bellinger pr_debug("Calling iscsit_tmr_post_handler >>>>>>>>>>>>>>>>>\n"); 1869b8d26b3bSNicholas Bellinger 1870b8d26b3bSNicholas Bellinger iscsit_tmr_post_handler(cmd, cmd->conn); 1871b8d26b3bSNicholas Bellinger 1872b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 187303e7848aSNicholas Bellinger isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false); 1874b8d26b3bSNicholas Bellinger break; 1875b8d26b3bSNicholas Bellinger case ISTATE_SEND_REJECT: 1876b8d26b3bSNicholas Bellinger pr_debug("Got isert_do_control_comp ISTATE_SEND_REJECT: >>>\n"); 1877b8d26b3bSNicholas Bellinger 1878b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 187903e7848aSNicholas Bellinger isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false); 18803df8f68aSNicholas Bellinger break; 1881b8d26b3bSNicholas Bellinger case ISTATE_SEND_LOGOUTRSP: 1882b8d26b3bSNicholas Bellinger pr_debug("Calling iscsit_logout_post_handler >>>>>>>>>>>>>>\n"); 18839d49f5e2SSagi Grimberg 1884b8d26b3bSNicholas Bellinger iscsit_logout_post_handler(cmd, cmd->conn); 1885b8d26b3bSNicholas Bellinger break; 1886adb54c29SNicholas Bellinger case ISTATE_SEND_TEXTRSP: 1887adb54c29SNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 188803e7848aSNicholas Bellinger isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev, false); 1889adb54c29SNicholas Bellinger break; 1890b8d26b3bSNicholas Bellinger default: 1891b8d26b3bSNicholas Bellinger pr_err("Unknown do_control_comp i_state %d\n", cmd->i_state); 1892b8d26b3bSNicholas Bellinger dump_stack(); 1893b8d26b3bSNicholas Bellinger break; 1894b8d26b3bSNicholas Bellinger } 1895b8d26b3bSNicholas Bellinger } 1896b8d26b3bSNicholas Bellinger 1897b8d26b3bSNicholas Bellinger static void 1898b8d26b3bSNicholas Bellinger isert_response_completion(struct iser_tx_desc *tx_desc, 1899b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd, 1900b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn, 1901b8d26b3bSNicholas Bellinger struct ib_device *ib_dev) 1902b8d26b3bSNicholas Bellinger { 1903d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1904b8d26b3bSNicholas Bellinger 1905b8d26b3bSNicholas Bellinger if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || 19063df8f68aSNicholas Bellinger cmd->i_state == ISTATE_SEND_LOGOUTRSP || 1907adb54c29SNicholas Bellinger cmd->i_state == ISTATE_SEND_REJECT || 1908adb54c29SNicholas Bellinger cmd->i_state == ISTATE_SEND_TEXTRSP) { 1909b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 1910b8d26b3bSNicholas Bellinger 1911b8d26b3bSNicholas Bellinger INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); 1912b8d26b3bSNicholas Bellinger queue_work(isert_comp_wq, &isert_cmd->comp_work); 1913b8d26b3bSNicholas Bellinger return; 1914b8d26b3bSNicholas Bellinger } 1915897bb2c9SSagi Grimberg 1916b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 191703e7848aSNicholas Bellinger isert_completion_put(tx_desc, isert_cmd, ib_dev, false); 1918b8d26b3bSNicholas Bellinger } 1919b8d26b3bSNicholas Bellinger 1920b8d26b3bSNicholas Bellinger static void 192168a86deeSSagi Grimberg isert_send_completion(struct iser_tx_desc *tx_desc, 1922b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn) 1923b8d26b3bSNicholas Bellinger { 1924b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1925b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd = tx_desc->isert_cmd; 1926b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr; 1927b8d26b3bSNicholas Bellinger 1928b8d26b3bSNicholas Bellinger if (!isert_cmd) { 1929b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 1930b8d26b3bSNicholas Bellinger return; 1931b8d26b3bSNicholas Bellinger } 1932b8d26b3bSNicholas Bellinger wr = &isert_cmd->rdma_wr; 1933b8d26b3bSNicholas Bellinger 1934b8d26b3bSNicholas Bellinger switch (wr->iser_ib_op) { 1935b8d26b3bSNicholas Bellinger case ISER_IB_RECV: 1936b8d26b3bSNicholas Bellinger pr_err("isert_send_completion: Got ISER_IB_RECV\n"); 1937b8d26b3bSNicholas Bellinger dump_stack(); 1938b8d26b3bSNicholas Bellinger break; 1939b8d26b3bSNicholas Bellinger case ISER_IB_SEND: 1940b8d26b3bSNicholas Bellinger pr_debug("isert_send_completion: Got ISER_IB_SEND\n"); 1941b8d26b3bSNicholas Bellinger isert_response_completion(tx_desc, isert_cmd, 1942b8d26b3bSNicholas Bellinger isert_conn, ib_dev); 1943b8d26b3bSNicholas Bellinger break; 1944b8d26b3bSNicholas Bellinger case ISER_IB_RDMA_WRITE: 1945f93f3a70SSagi Grimberg pr_debug("isert_send_completion: Got ISER_IB_RDMA_WRITE\n"); 1946f93f3a70SSagi Grimberg isert_completion_rdma_write(tx_desc, isert_cmd); 1947b8d26b3bSNicholas Bellinger break; 1948b8d26b3bSNicholas Bellinger case ISER_IB_RDMA_READ: 1949b8d26b3bSNicholas Bellinger pr_debug("isert_send_completion: Got ISER_IB_RDMA_READ:\n"); 1950b8d26b3bSNicholas Bellinger 1951b8d26b3bSNicholas Bellinger isert_completion_rdma_read(tx_desc, isert_cmd); 1952b8d26b3bSNicholas Bellinger break; 1953b8d26b3bSNicholas Bellinger default: 1954b8d26b3bSNicholas Bellinger pr_err("Unknown wr->iser_ib_op: 0x%02x\n", wr->iser_ib_op); 1955b8d26b3bSNicholas Bellinger dump_stack(); 1956b8d26b3bSNicholas Bellinger break; 1957b8d26b3bSNicholas Bellinger } 1958b8d26b3bSNicholas Bellinger } 1959b8d26b3bSNicholas Bellinger 19606f0fae3dSSagi Grimberg /** 19616f0fae3dSSagi Grimberg * is_isert_tx_desc() - Indicate if the completion wr_id 19626f0fae3dSSagi Grimberg * is a TX descriptor or not. 19636f0fae3dSSagi Grimberg * @isert_conn: iser connection 19646f0fae3dSSagi Grimberg * @wr_id: completion WR identifier 19656f0fae3dSSagi Grimberg * 19666f0fae3dSSagi Grimberg * Since we cannot rely on wc opcode in FLUSH errors 19676f0fae3dSSagi Grimberg * we must work around it by checking if the wr_id address 19686f0fae3dSSagi Grimberg * falls in the iser connection rx_descs buffer. If so 19696f0fae3dSSagi Grimberg * it is an RX descriptor, otherwize it is a TX. 19706f0fae3dSSagi Grimberg */ 19716f0fae3dSSagi Grimberg static inline bool 19726f0fae3dSSagi Grimberg is_isert_tx_desc(struct isert_conn *isert_conn, void *wr_id) 1973b8d26b3bSNicholas Bellinger { 19746f0fae3dSSagi Grimberg void *start = isert_conn->conn_rx_descs; 19756f0fae3dSSagi Grimberg int len = ISERT_QP_MAX_RECV_DTOS * sizeof(*isert_conn->conn_rx_descs); 19766f0fae3dSSagi Grimberg 19776f0fae3dSSagi Grimberg if (wr_id >= start && wr_id < start + len) 19786f0fae3dSSagi Grimberg return false; 19796f0fae3dSSagi Grimberg 19806f0fae3dSSagi Grimberg return true; 19816f0fae3dSSagi Grimberg } 19826f0fae3dSSagi Grimberg 19836f0fae3dSSagi Grimberg static void 19846f0fae3dSSagi Grimberg isert_cq_comp_err(struct isert_conn *isert_conn, struct ib_wc *wc) 19856f0fae3dSSagi Grimberg { 1986*bdf20e72SSagi Grimberg if (wc->wr_id == ISER_BEACON_WRID) { 1987*bdf20e72SSagi Grimberg struct iscsi_conn *conn = isert_conn->conn; 1988*bdf20e72SSagi Grimberg 1989*bdf20e72SSagi Grimberg if (conn->sess) { 1990*bdf20e72SSagi Grimberg target_sess_cmd_list_set_waiting(conn->sess->se_sess); 1991*bdf20e72SSagi Grimberg target_wait_for_sess_cmds(conn->sess->se_sess); 1992*bdf20e72SSagi Grimberg } 1993*bdf20e72SSagi Grimberg 1994*bdf20e72SSagi Grimberg pr_info("conn %p completing conn_wait_comp_err\n", 1995*bdf20e72SSagi Grimberg isert_conn); 1996*bdf20e72SSagi Grimberg complete(&isert_conn->conn_wait_comp_err); 1997*bdf20e72SSagi Grimberg } else 19986f0fae3dSSagi Grimberg if (is_isert_tx_desc(isert_conn, (void *)wc->wr_id)) { 1999b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2000df43debdSSagi Grimberg struct isert_cmd *isert_cmd; 20016f0fae3dSSagi Grimberg struct iser_tx_desc *desc; 2002b8d26b3bSNicholas Bellinger 20036f0fae3dSSagi Grimberg desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; 20046f0fae3dSSagi Grimberg isert_cmd = desc->isert_cmd; 2005b8d26b3bSNicholas Bellinger if (!isert_cmd) 2006df43debdSSagi Grimberg isert_unmap_tx_desc(desc, ib_dev); 2007b8d26b3bSNicholas Bellinger else 2008df43debdSSagi Grimberg isert_completion_put(desc, isert_cmd, ib_dev, true); 2009df43debdSSagi Grimberg } else { 2010df43debdSSagi Grimberg isert_conn->post_recv_buf_count--; 2011*bdf20e72SSagi Grimberg if (!isert_conn->post_recv_buf_count) 20129d49f5e2SSagi Grimberg iscsit_cause_connection_reinstatement(isert_conn->conn, 0); 2013b8d26b3bSNicholas Bellinger } 2014df43debdSSagi Grimberg } 2015b8d26b3bSNicholas Bellinger 2016b8d26b3bSNicholas Bellinger static void 20176f0fae3dSSagi Grimberg isert_handle_wc(struct ib_wc *wc) 2018b8d26b3bSNicholas Bellinger { 2019b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 2020b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc; 20216f0fae3dSSagi Grimberg struct iser_rx_desc *rx_desc; 2022b8d26b3bSNicholas Bellinger 20236f0fae3dSSagi Grimberg isert_conn = wc->qp->qp_context; 20246f0fae3dSSagi Grimberg if (likely(wc->status == IB_WC_SUCCESS)) { 20256f0fae3dSSagi Grimberg if (wc->opcode == IB_WC_RECV) { 20266f0fae3dSSagi Grimberg rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id; 20276f0fae3dSSagi Grimberg isert_rx_completion(rx_desc, isert_conn, wc->byte_len); 2028b8d26b3bSNicholas Bellinger } else { 20296f0fae3dSSagi Grimberg tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; 20306f0fae3dSSagi Grimberg isert_send_completion(tx_desc, isert_conn); 2031b8d26b3bSNicholas Bellinger } 20326f0fae3dSSagi Grimberg } else { 20336f0fae3dSSagi Grimberg if (wc->status != IB_WC_WR_FLUSH_ERR) 20346f0fae3dSSagi Grimberg pr_err("wr id %llx status %d vend_err %x\n", 20356f0fae3dSSagi Grimberg wc->wr_id, wc->status, wc->vendor_err); 20366f0fae3dSSagi Grimberg else 20376f0fae3dSSagi Grimberg pr_debug("flush error: wr id %llx\n", wc->wr_id); 2038b8d26b3bSNicholas Bellinger 20396f0fae3dSSagi Grimberg if (wc->wr_id != ISER_FASTREG_LI_WRID) 20406f0fae3dSSagi Grimberg isert_cq_comp_err(isert_conn, wc); 20416f0fae3dSSagi Grimberg } 2042b8d26b3bSNicholas Bellinger } 2043b8d26b3bSNicholas Bellinger 2044b8d26b3bSNicholas Bellinger static void 20456f0fae3dSSagi Grimberg isert_cq_work(struct work_struct *work) 2046b8d26b3bSNicholas Bellinger { 20474a295baeSSagi Grimberg struct isert_comp *comp = container_of(work, struct isert_comp, 20486f0fae3dSSagi Grimberg work); 2049b8d26b3bSNicholas Bellinger struct ib_wc wc; 2050b8d26b3bSNicholas Bellinger 20516f0fae3dSSagi Grimberg while (ib_poll_cq(comp->cq, 1, &wc) == 1) 20526f0fae3dSSagi Grimberg isert_handle_wc(&wc); 2053b8d26b3bSNicholas Bellinger 20546f0fae3dSSagi Grimberg ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); 2055b8d26b3bSNicholas Bellinger } 2056b8d26b3bSNicholas Bellinger 2057b8d26b3bSNicholas Bellinger static void 20586f0fae3dSSagi Grimberg isert_cq_callback(struct ib_cq *cq, void *context) 2059b8d26b3bSNicholas Bellinger { 20604a295baeSSagi Grimberg struct isert_comp *comp = context; 2061b8d26b3bSNicholas Bellinger 20626f0fae3dSSagi Grimberg queue_work(isert_comp_wq, &comp->work); 2063b8d26b3bSNicholas Bellinger } 2064b8d26b3bSNicholas Bellinger 2065b8d26b3bSNicholas Bellinger static int 2066b8d26b3bSNicholas Bellinger isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) 2067b8d26b3bSNicholas Bellinger { 2068b8d26b3bSNicholas Bellinger struct ib_send_wr *wr_failed; 2069b8d26b3bSNicholas Bellinger int ret; 2070b8d26b3bSNicholas Bellinger 2071b8d26b3bSNicholas Bellinger ret = ib_post_send(isert_conn->conn_qp, &isert_cmd->tx_desc.send_wr, 2072b8d26b3bSNicholas Bellinger &wr_failed); 2073b8d26b3bSNicholas Bellinger if (ret) { 2074b8d26b3bSNicholas Bellinger pr_err("ib_post_send failed with %d\n", ret); 2075b8d26b3bSNicholas Bellinger return ret; 2076b8d26b3bSNicholas Bellinger } 2077b8d26b3bSNicholas Bellinger return ret; 2078b8d26b3bSNicholas Bellinger } 2079b8d26b3bSNicholas Bellinger 2080b8d26b3bSNicholas Bellinger static int 2081b8d26b3bSNicholas Bellinger isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) 2082b8d26b3bSNicholas Bellinger { 2083d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2084b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2085b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2086b8d26b3bSNicholas Bellinger struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) 2087b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header; 2088b8d26b3bSNicholas Bellinger 2089b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2090b8d26b3bSNicholas Bellinger iscsit_build_rsp_pdu(cmd, conn, true, hdr); 2091b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 2092b8d26b3bSNicholas Bellinger /* 2093b8d26b3bSNicholas Bellinger * Attach SENSE DATA payload to iSCSI Response PDU 2094b8d26b3bSNicholas Bellinger */ 2095b8d26b3bSNicholas Bellinger if (cmd->se_cmd.sense_buffer && 2096b8d26b3bSNicholas Bellinger ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 2097b8d26b3bSNicholas Bellinger (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 2098b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2099b8d26b3bSNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 2100dbbc5d11SNicholas Bellinger u32 padding, pdu_len; 2101b8d26b3bSNicholas Bellinger 2102b8d26b3bSNicholas Bellinger put_unaligned_be16(cmd->se_cmd.scsi_sense_length, 2103b8d26b3bSNicholas Bellinger cmd->sense_buffer); 2104b8d26b3bSNicholas Bellinger cmd->se_cmd.scsi_sense_length += sizeof(__be16); 2105b8d26b3bSNicholas Bellinger 2106b8d26b3bSNicholas Bellinger padding = -(cmd->se_cmd.scsi_sense_length) & 3; 2107b8d26b3bSNicholas Bellinger hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); 2108dbbc5d11SNicholas Bellinger pdu_len = cmd->se_cmd.scsi_sense_length + padding; 2109b8d26b3bSNicholas Bellinger 2110dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 2111dbbc5d11SNicholas Bellinger (void *)cmd->sense_buffer, pdu_len, 2112b8d26b3bSNicholas Bellinger DMA_TO_DEVICE); 2113b8d26b3bSNicholas Bellinger 2114dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len = pdu_len; 2115dbbc5d11SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 2116dbbc5d11SNicholas Bellinger tx_dsg->length = pdu_len; 2117b8d26b3bSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 2118b8d26b3bSNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 2119b8d26b3bSNicholas Bellinger } 2120b8d26b3bSNicholas Bellinger 212168a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2122b8d26b3bSNicholas Bellinger 2123b8d26b3bSNicholas Bellinger pr_debug("Posting SCSI Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2124b8d26b3bSNicholas Bellinger 2125b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2126b8d26b3bSNicholas Bellinger } 2127b8d26b3bSNicholas Bellinger 2128131e6abcSNicholas Bellinger static void 2129131e6abcSNicholas Bellinger isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) 2130131e6abcSNicholas Bellinger { 2131131e6abcSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2132131e6abcSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2133131e6abcSNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 2134131e6abcSNicholas Bellinger 2135131e6abcSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 2136131e6abcSNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 2137131e6abcSNicholas Bellinger list_del_init(&cmd->i_conn_node); 2138131e6abcSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 2139131e6abcSNicholas Bellinger 2140131e6abcSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) 2141131e6abcSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 2142131e6abcSNicholas Bellinger 2143131e6abcSNicholas Bellinger device->unreg_rdma_mem(isert_cmd, isert_conn); 2144131e6abcSNicholas Bellinger } 2145131e6abcSNicholas Bellinger 2146e70beee7SNicholas Bellinger static enum target_prot_op 2147e70beee7SNicholas Bellinger isert_get_sup_prot_ops(struct iscsi_conn *conn) 2148e70beee7SNicholas Bellinger { 2149e70beee7SNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2150e70beee7SNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 2151e70beee7SNicholas Bellinger 215223a548eeSSagi Grimberg if (conn->tpg->tpg_attrib.t10_pi) { 215323a548eeSSagi Grimberg if (device->pi_capable) { 215423a548eeSSagi Grimberg pr_info("conn %p PI offload enabled\n", isert_conn); 215523a548eeSSagi Grimberg isert_conn->pi_support = true; 2156e70beee7SNicholas Bellinger return TARGET_PROT_ALL; 215723a548eeSSagi Grimberg } 215823a548eeSSagi Grimberg } 215923a548eeSSagi Grimberg 216023a548eeSSagi Grimberg pr_info("conn %p PI offload disabled\n", isert_conn); 216123a548eeSSagi Grimberg isert_conn->pi_support = false; 2162e70beee7SNicholas Bellinger 2163e70beee7SNicholas Bellinger return TARGET_PROT_NORMAL; 2164e70beee7SNicholas Bellinger } 2165e70beee7SNicholas Bellinger 2166b8d26b3bSNicholas Bellinger static int 2167b8d26b3bSNicholas Bellinger isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, 2168b8d26b3bSNicholas Bellinger bool nopout_response) 2169b8d26b3bSNicholas Bellinger { 2170d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2171b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2172b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2173b8d26b3bSNicholas Bellinger 2174b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2175b8d26b3bSNicholas Bellinger iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) 2176b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header, 2177b8d26b3bSNicholas Bellinger nopout_response); 2178b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 217968a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2180b8d26b3bSNicholas Bellinger 21818b513d0cSMasanari Iida pr_debug("Posting NOPIN Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2182b8d26b3bSNicholas Bellinger 2183b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2184b8d26b3bSNicholas Bellinger } 2185b8d26b3bSNicholas Bellinger 2186b8d26b3bSNicholas Bellinger static int 2187b8d26b3bSNicholas Bellinger isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2188b8d26b3bSNicholas Bellinger { 2189d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2190b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2191b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2192b8d26b3bSNicholas Bellinger 2193b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2194b8d26b3bSNicholas Bellinger iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) 2195b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2196b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 219768a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2198b8d26b3bSNicholas Bellinger 2199b8d26b3bSNicholas Bellinger pr_debug("Posting Logout Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2200b8d26b3bSNicholas Bellinger 2201b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2202b8d26b3bSNicholas Bellinger } 2203b8d26b3bSNicholas Bellinger 2204b8d26b3bSNicholas Bellinger static int 2205b8d26b3bSNicholas Bellinger isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2206b8d26b3bSNicholas Bellinger { 2207d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2208b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2209b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2210b8d26b3bSNicholas Bellinger 2211b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2212b8d26b3bSNicholas Bellinger iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) 2213b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2214b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 221568a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2216b8d26b3bSNicholas Bellinger 2217b8d26b3bSNicholas Bellinger pr_debug("Posting Task Management Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2218b8d26b3bSNicholas Bellinger 2219b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2220b8d26b3bSNicholas Bellinger } 2221b8d26b3bSNicholas Bellinger 2222b8d26b3bSNicholas Bellinger static int 2223b8d26b3bSNicholas Bellinger isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2224b8d26b3bSNicholas Bellinger { 2225d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2226b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2227b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 22283df8f68aSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 22293df8f68aSNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 22303df8f68aSNicholas Bellinger struct iscsi_reject *hdr = 22313df8f68aSNicholas Bellinger (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; 2232b8d26b3bSNicholas Bellinger 2233b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 22343df8f68aSNicholas Bellinger iscsit_build_reject(cmd, conn, hdr); 2235b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 22363df8f68aSNicholas Bellinger 22373df8f68aSNicholas Bellinger hton24(hdr->dlength, ISCSI_HDR_LEN); 2238dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 22393df8f68aSNicholas Bellinger (void *)cmd->buf_ptr, ISCSI_HDR_LEN, 22403df8f68aSNicholas Bellinger DMA_TO_DEVICE); 2241dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; 2242dbbc5d11SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 22433df8f68aSNicholas Bellinger tx_dsg->length = ISCSI_HDR_LEN; 22443df8f68aSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 22453df8f68aSNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 22463df8f68aSNicholas Bellinger 224768a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2248b8d26b3bSNicholas Bellinger 2249b8d26b3bSNicholas Bellinger pr_debug("Posting Reject IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2250b8d26b3bSNicholas Bellinger 2251b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2252b8d26b3bSNicholas Bellinger } 2253b8d26b3bSNicholas Bellinger 2254b8d26b3bSNicholas Bellinger static int 2255adb54c29SNicholas Bellinger isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2256adb54c29SNicholas Bellinger { 2257d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2258adb54c29SNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2259adb54c29SNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2260adb54c29SNicholas Bellinger struct iscsi_text_rsp *hdr = 2261adb54c29SNicholas Bellinger (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; 2262adb54c29SNicholas Bellinger u32 txt_rsp_len; 2263adb54c29SNicholas Bellinger int rc; 2264adb54c29SNicholas Bellinger 2265adb54c29SNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 226622c7aaa5SSagi Grimberg rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); 2267adb54c29SNicholas Bellinger if (rc < 0) 2268adb54c29SNicholas Bellinger return rc; 2269adb54c29SNicholas Bellinger 2270adb54c29SNicholas Bellinger txt_rsp_len = rc; 2271adb54c29SNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 2272adb54c29SNicholas Bellinger 2273adb54c29SNicholas Bellinger if (txt_rsp_len) { 2274adb54c29SNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2275adb54c29SNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 2276adb54c29SNicholas Bellinger void *txt_rsp_buf = cmd->buf_ptr; 2277adb54c29SNicholas Bellinger 2278adb54c29SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 2279adb54c29SNicholas Bellinger txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); 2280adb54c29SNicholas Bellinger 2281adb54c29SNicholas Bellinger isert_cmd->pdu_buf_len = txt_rsp_len; 2282adb54c29SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 2283adb54c29SNicholas Bellinger tx_dsg->length = txt_rsp_len; 2284adb54c29SNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 2285adb54c29SNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 2286adb54c29SNicholas Bellinger } 228768a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2288adb54c29SNicholas Bellinger 2289adb54c29SNicholas Bellinger pr_debug("Posting Text Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2290adb54c29SNicholas Bellinger 2291adb54c29SNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2292adb54c29SNicholas Bellinger } 2293adb54c29SNicholas Bellinger 2294adb54c29SNicholas Bellinger static int 2295b8d26b3bSNicholas Bellinger isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 2296b8d26b3bSNicholas Bellinger struct ib_sge *ib_sge, struct ib_send_wr *send_wr, 2297b8d26b3bSNicholas Bellinger u32 data_left, u32 offset) 2298b8d26b3bSNicholas Bellinger { 2299d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 2300b8d26b3bSNicholas Bellinger struct scatterlist *sg_start, *tmp_sg; 2301b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2302b8d26b3bSNicholas Bellinger u32 sg_off, page_off; 2303b8d26b3bSNicholas Bellinger int i = 0, sg_nents; 2304b8d26b3bSNicholas Bellinger 2305b8d26b3bSNicholas Bellinger sg_off = offset / PAGE_SIZE; 2306b8d26b3bSNicholas Bellinger sg_start = &cmd->se_cmd.t_data_sg[sg_off]; 2307b8d26b3bSNicholas Bellinger sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); 2308b8d26b3bSNicholas Bellinger page_off = offset % PAGE_SIZE; 2309b8d26b3bSNicholas Bellinger 2310b8d26b3bSNicholas Bellinger send_wr->sg_list = ib_sge; 2311b8d26b3bSNicholas Bellinger send_wr->num_sge = sg_nents; 2312b0a191e7SSagi Grimberg send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; 2313b8d26b3bSNicholas Bellinger /* 2314b8d26b3bSNicholas Bellinger * Perform mapping of TCM scatterlist memory ib_sge dma_addr. 2315b8d26b3bSNicholas Bellinger */ 2316b8d26b3bSNicholas Bellinger for_each_sg(sg_start, tmp_sg, sg_nents, i) { 2317b8d26b3bSNicholas Bellinger pr_debug("ISER RDMA from SGL dma_addr: 0x%16llx dma_len: %u, page_off: %u\n", 2318b8d26b3bSNicholas Bellinger (unsigned long long)tmp_sg->dma_address, 2319b8d26b3bSNicholas Bellinger tmp_sg->length, page_off); 2320b8d26b3bSNicholas Bellinger 2321b8d26b3bSNicholas Bellinger ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; 2322b8d26b3bSNicholas Bellinger ib_sge->length = min_t(u32, data_left, 2323b8d26b3bSNicholas Bellinger ib_sg_dma_len(ib_dev, tmp_sg) - page_off); 2324b8d26b3bSNicholas Bellinger ib_sge->lkey = isert_conn->conn_mr->lkey; 2325b8d26b3bSNicholas Bellinger 232690ecc6e2SVu Pham pr_debug("RDMA ib_sge: addr: 0x%16llx length: %u lkey: %08x\n", 232790ecc6e2SVu Pham ib_sge->addr, ib_sge->length, ib_sge->lkey); 2328b8d26b3bSNicholas Bellinger page_off = 0; 2329b8d26b3bSNicholas Bellinger data_left -= ib_sge->length; 2330b8d26b3bSNicholas Bellinger ib_sge++; 2331b8d26b3bSNicholas Bellinger pr_debug("Incrementing ib_sge pointer to %p\n", ib_sge); 2332b8d26b3bSNicholas Bellinger } 2333b8d26b3bSNicholas Bellinger 2334b8d26b3bSNicholas Bellinger pr_debug("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", 2335b8d26b3bSNicholas Bellinger send_wr->sg_list, send_wr->num_sge); 2336b8d26b3bSNicholas Bellinger 2337b8d26b3bSNicholas Bellinger return sg_nents; 2338b8d26b3bSNicholas Bellinger } 2339b8d26b3bSNicholas Bellinger 2340b8d26b3bSNicholas Bellinger static int 234190ecc6e2SVu Pham isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 234290ecc6e2SVu Pham struct isert_rdma_wr *wr) 2343b8d26b3bSNicholas Bellinger { 2344b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 2345d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2346b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2347e3d7e4c3SSagi Grimberg struct isert_data_buf *data = &wr->data; 234890ecc6e2SVu Pham struct ib_send_wr *send_wr; 2349b8d26b3bSNicholas Bellinger struct ib_sge *ib_sge; 2350e3d7e4c3SSagi Grimberg u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; 2351e3d7e4c3SSagi Grimberg int ret = 0, i, ib_sge_cnt; 2352b8d26b3bSNicholas Bellinger 235390ecc6e2SVu Pham isert_cmd->tx_desc.isert_cmd = isert_cmd; 2354b8d26b3bSNicholas Bellinger 2355e3d7e4c3SSagi Grimberg offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; 2356e3d7e4c3SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, 2357e3d7e4c3SSagi Grimberg se_cmd->t_data_nents, se_cmd->data_length, 2358e3d7e4c3SSagi Grimberg offset, wr->iser_ib_op, &wr->data); 2359e3d7e4c3SSagi Grimberg if (ret) 2360e3d7e4c3SSagi Grimberg return ret; 2361b8d26b3bSNicholas Bellinger 2362e3d7e4c3SSagi Grimberg data_left = data->len; 2363e3d7e4c3SSagi Grimberg offset = data->offset; 2364b8d26b3bSNicholas Bellinger 2365e3d7e4c3SSagi Grimberg ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); 2366b8d26b3bSNicholas Bellinger if (!ib_sge) { 236790ecc6e2SVu Pham pr_warn("Unable to allocate ib_sge\n"); 2368b8d26b3bSNicholas Bellinger ret = -ENOMEM; 2369e3d7e4c3SSagi Grimberg goto unmap_cmd; 2370b8d26b3bSNicholas Bellinger } 237190ecc6e2SVu Pham wr->ib_sge = ib_sge; 2372b8d26b3bSNicholas Bellinger 2373e3d7e4c3SSagi Grimberg wr->send_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); 2374b8d26b3bSNicholas Bellinger wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num, 2375b8d26b3bSNicholas Bellinger GFP_KERNEL); 2376b8d26b3bSNicholas Bellinger if (!wr->send_wr) { 237790ecc6e2SVu Pham pr_debug("Unable to allocate wr->send_wr\n"); 2378b8d26b3bSNicholas Bellinger ret = -ENOMEM; 2379e3d7e4c3SSagi Grimberg goto unmap_cmd; 2380b8d26b3bSNicholas Bellinger } 2381b8d26b3bSNicholas Bellinger 2382b8d26b3bSNicholas Bellinger wr->isert_cmd = isert_cmd; 2383b8d26b3bSNicholas Bellinger rdma_write_max = isert_conn->max_sge * PAGE_SIZE; 2384b8d26b3bSNicholas Bellinger 2385b8d26b3bSNicholas Bellinger for (i = 0; i < wr->send_wr_num; i++) { 2386b8d26b3bSNicholas Bellinger send_wr = &isert_cmd->rdma_wr.send_wr[i]; 2387b8d26b3bSNicholas Bellinger data_len = min(data_left, rdma_write_max); 2388b8d26b3bSNicholas Bellinger 2389b8d26b3bSNicholas Bellinger send_wr->send_flags = 0; 239090ecc6e2SVu Pham if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { 239190ecc6e2SVu Pham send_wr->opcode = IB_WR_RDMA_WRITE; 2392b8d26b3bSNicholas Bellinger send_wr->wr.rdma.remote_addr = isert_cmd->read_va + offset; 2393b8d26b3bSNicholas Bellinger send_wr->wr.rdma.rkey = isert_cmd->read_stag; 239490ecc6e2SVu Pham if (i + 1 == wr->send_wr_num) 239590ecc6e2SVu Pham send_wr->next = &isert_cmd->tx_desc.send_wr; 239690ecc6e2SVu Pham else 239790ecc6e2SVu Pham send_wr->next = &wr->send_wr[i + 1]; 239890ecc6e2SVu Pham } else { 239990ecc6e2SVu Pham send_wr->opcode = IB_WR_RDMA_READ; 240090ecc6e2SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->write_va + va_offset; 240190ecc6e2SVu Pham send_wr->wr.rdma.rkey = isert_cmd->write_stag; 240290ecc6e2SVu Pham if (i + 1 == wr->send_wr_num) 240390ecc6e2SVu Pham send_wr->send_flags = IB_SEND_SIGNALED; 240490ecc6e2SVu Pham else 240590ecc6e2SVu Pham send_wr->next = &wr->send_wr[i + 1]; 240690ecc6e2SVu Pham } 2407b8d26b3bSNicholas Bellinger 2408b8d26b3bSNicholas Bellinger ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, 2409b8d26b3bSNicholas Bellinger send_wr, data_len, offset); 2410b8d26b3bSNicholas Bellinger ib_sge += ib_sge_cnt; 2411b8d26b3bSNicholas Bellinger 2412b8d26b3bSNicholas Bellinger offset += data_len; 241390ecc6e2SVu Pham va_offset += data_len; 2414b8d26b3bSNicholas Bellinger data_left -= data_len; 2415b8d26b3bSNicholas Bellinger } 241690ecc6e2SVu Pham 241790ecc6e2SVu Pham return 0; 2418e3d7e4c3SSagi Grimberg unmap_cmd: 2419e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, data); 2420e3d7e4c3SSagi Grimberg 242190ecc6e2SVu Pham return ret; 242290ecc6e2SVu Pham } 242390ecc6e2SVu Pham 242490ecc6e2SVu Pham static int 242559464ef4SVu Pham isert_map_fr_pagelist(struct ib_device *ib_dev, 242659464ef4SVu Pham struct scatterlist *sg_start, int sg_nents, u64 *fr_pl) 242759464ef4SVu Pham { 242859464ef4SVu Pham u64 start_addr, end_addr, page, chunk_start = 0; 242959464ef4SVu Pham struct scatterlist *tmp_sg; 243059464ef4SVu Pham int i = 0, new_chunk, last_ent, n_pages; 243159464ef4SVu Pham 243259464ef4SVu Pham n_pages = 0; 243359464ef4SVu Pham new_chunk = 1; 243459464ef4SVu Pham last_ent = sg_nents - 1; 243559464ef4SVu Pham for_each_sg(sg_start, tmp_sg, sg_nents, i) { 243659464ef4SVu Pham start_addr = ib_sg_dma_address(ib_dev, tmp_sg); 243759464ef4SVu Pham if (new_chunk) 243859464ef4SVu Pham chunk_start = start_addr; 243959464ef4SVu Pham end_addr = start_addr + ib_sg_dma_len(ib_dev, tmp_sg); 244059464ef4SVu Pham 244159464ef4SVu Pham pr_debug("SGL[%d] dma_addr: 0x%16llx len: %u\n", 244259464ef4SVu Pham i, (unsigned long long)tmp_sg->dma_address, 244359464ef4SVu Pham tmp_sg->length); 244459464ef4SVu Pham 244559464ef4SVu Pham if ((end_addr & ~PAGE_MASK) && i < last_ent) { 244659464ef4SVu Pham new_chunk = 0; 244759464ef4SVu Pham continue; 244859464ef4SVu Pham } 244959464ef4SVu Pham new_chunk = 1; 245059464ef4SVu Pham 245159464ef4SVu Pham page = chunk_start & PAGE_MASK; 245259464ef4SVu Pham do { 245359464ef4SVu Pham fr_pl[n_pages++] = page; 245459464ef4SVu Pham pr_debug("Mapped page_list[%d] page_addr: 0x%16llx\n", 245559464ef4SVu Pham n_pages - 1, page); 245659464ef4SVu Pham page += PAGE_SIZE; 245759464ef4SVu Pham } while (page < end_addr); 245859464ef4SVu Pham } 245959464ef4SVu Pham 246059464ef4SVu Pham return n_pages; 246159464ef4SVu Pham } 246259464ef4SVu Pham 246359464ef4SVu Pham static int 2464e3d7e4c3SSagi Grimberg isert_fast_reg_mr(struct isert_conn *isert_conn, 2465e3d7e4c3SSagi Grimberg struct fast_reg_descriptor *fr_desc, 2466e3d7e4c3SSagi Grimberg struct isert_data_buf *mem, 24679e961ae7SSagi Grimberg enum isert_indicator ind, 2468e3d7e4c3SSagi Grimberg struct ib_sge *sge) 246959464ef4SVu Pham { 247059464ef4SVu Pham struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 24719e961ae7SSagi Grimberg struct ib_mr *mr; 24729e961ae7SSagi Grimberg struct ib_fast_reg_page_list *frpl; 247359464ef4SVu Pham struct ib_send_wr fr_wr, inv_wr; 247459464ef4SVu Pham struct ib_send_wr *bad_wr, *wr = NULL; 24759bd626e7SSagi Grimberg int ret, pagelist_len; 24769bd626e7SSagi Grimberg u32 page_off; 247759464ef4SVu Pham u8 key; 247859464ef4SVu Pham 2479e3d7e4c3SSagi Grimberg if (mem->dma_nents == 1) { 2480e3d7e4c3SSagi Grimberg sge->lkey = isert_conn->conn_mr->lkey; 2481e3d7e4c3SSagi Grimberg sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); 2482e3d7e4c3SSagi Grimberg sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); 24839e961ae7SSagi Grimberg pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n", 24849e961ae7SSagi Grimberg __func__, __LINE__, sge->addr, sge->length, 24859e961ae7SSagi Grimberg sge->lkey); 2486e3d7e4c3SSagi Grimberg return 0; 2487e3d7e4c3SSagi Grimberg } 2488e3d7e4c3SSagi Grimberg 24899e961ae7SSagi Grimberg if (ind == ISERT_DATA_KEY_VALID) { 24909e961ae7SSagi Grimberg /* Registering data buffer */ 24919e961ae7SSagi Grimberg mr = fr_desc->data_mr; 24929e961ae7SSagi Grimberg frpl = fr_desc->data_frpl; 24939e961ae7SSagi Grimberg } else { 24949e961ae7SSagi Grimberg /* Registering protection buffer */ 24959e961ae7SSagi Grimberg mr = fr_desc->pi_ctx->prot_mr; 24969e961ae7SSagi Grimberg frpl = fr_desc->pi_ctx->prot_frpl; 24979e961ae7SSagi Grimberg } 24989e961ae7SSagi Grimberg 2499e3d7e4c3SSagi Grimberg page_off = mem->offset % PAGE_SIZE; 250059464ef4SVu Pham 25019bd626e7SSagi Grimberg pr_debug("Use fr_desc %p sg_nents %d offset %u\n", 2502e3d7e4c3SSagi Grimberg fr_desc, mem->nents, mem->offset); 250359464ef4SVu Pham 2504e3d7e4c3SSagi Grimberg pagelist_len = isert_map_fr_pagelist(ib_dev, mem->sg, mem->nents, 25059e961ae7SSagi Grimberg &frpl->page_list[0]); 250659464ef4SVu Pham 2507d3e125daSSagi Grimberg if (!(fr_desc->ind & ISERT_DATA_KEY_VALID)) { 250859464ef4SVu Pham memset(&inv_wr, 0, sizeof(inv_wr)); 25099bb4ca68SNicholas Bellinger inv_wr.wr_id = ISER_FASTREG_LI_WRID; 251059464ef4SVu Pham inv_wr.opcode = IB_WR_LOCAL_INV; 25119e961ae7SSagi Grimberg inv_wr.ex.invalidate_rkey = mr->rkey; 251259464ef4SVu Pham wr = &inv_wr; 251359464ef4SVu Pham /* Bump the key */ 25149e961ae7SSagi Grimberg key = (u8)(mr->rkey & 0x000000FF); 25159e961ae7SSagi Grimberg ib_update_fast_reg_key(mr, ++key); 251659464ef4SVu Pham } 251759464ef4SVu Pham 251859464ef4SVu Pham /* Prepare FASTREG WR */ 251959464ef4SVu Pham memset(&fr_wr, 0, sizeof(fr_wr)); 25209bb4ca68SNicholas Bellinger fr_wr.wr_id = ISER_FASTREG_LI_WRID; 252159464ef4SVu Pham fr_wr.opcode = IB_WR_FAST_REG_MR; 25229e961ae7SSagi Grimberg fr_wr.wr.fast_reg.iova_start = frpl->page_list[0] + page_off; 25239e961ae7SSagi Grimberg fr_wr.wr.fast_reg.page_list = frpl; 252459464ef4SVu Pham fr_wr.wr.fast_reg.page_list_len = pagelist_len; 252559464ef4SVu Pham fr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; 2526e3d7e4c3SSagi Grimberg fr_wr.wr.fast_reg.length = mem->len; 25279e961ae7SSagi Grimberg fr_wr.wr.fast_reg.rkey = mr->rkey; 252859464ef4SVu Pham fr_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE; 252959464ef4SVu Pham 253059464ef4SVu Pham if (!wr) 253159464ef4SVu Pham wr = &fr_wr; 253259464ef4SVu Pham else 253359464ef4SVu Pham wr->next = &fr_wr; 253459464ef4SVu Pham 253559464ef4SVu Pham ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr); 253659464ef4SVu Pham if (ret) { 253759464ef4SVu Pham pr_err("fast registration failed, ret:%d\n", ret); 253859464ef4SVu Pham return ret; 253959464ef4SVu Pham } 25409e961ae7SSagi Grimberg fr_desc->ind &= ~ind; 254159464ef4SVu Pham 25429e961ae7SSagi Grimberg sge->lkey = mr->lkey; 25439e961ae7SSagi Grimberg sge->addr = frpl->page_list[0] + page_off; 2544e3d7e4c3SSagi Grimberg sge->length = mem->len; 254559464ef4SVu Pham 25469e961ae7SSagi Grimberg pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n", 25479e961ae7SSagi Grimberg __func__, __LINE__, sge->addr, sge->length, 25489e961ae7SSagi Grimberg sge->lkey); 254959464ef4SVu Pham 255059464ef4SVu Pham return ret; 255159464ef4SVu Pham } 255259464ef4SVu Pham 25533d73cf1aSSagi Grimberg static inline void 25543d73cf1aSSagi Grimberg isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, 25553d73cf1aSSagi Grimberg struct ib_sig_domain *domain) 25569e961ae7SSagi Grimberg { 255778eda2bbSSagi Grimberg domain->sig_type = IB_SIG_TYPE_T10_DIF; 25583d73cf1aSSagi Grimberg domain->sig.dif.bg_type = IB_T10DIF_CRC; 25593d73cf1aSSagi Grimberg domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; 25603d73cf1aSSagi Grimberg domain->sig.dif.ref_tag = se_cmd->reftag_seed; 256178eda2bbSSagi Grimberg /* 256278eda2bbSSagi Grimberg * At the moment we hard code those, but if in the future 256378eda2bbSSagi Grimberg * the target core would like to use it, we will take it 256478eda2bbSSagi Grimberg * from se_cmd. 256578eda2bbSSagi Grimberg */ 256678eda2bbSSagi Grimberg domain->sig.dif.apptag_check_mask = 0xffff; 256778eda2bbSSagi Grimberg domain->sig.dif.app_escape = true; 256878eda2bbSSagi Grimberg domain->sig.dif.ref_escape = true; 256978eda2bbSSagi Grimberg if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || 257078eda2bbSSagi Grimberg se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) 257178eda2bbSSagi Grimberg domain->sig.dif.ref_remap = true; 25723d73cf1aSSagi Grimberg }; 25733d73cf1aSSagi Grimberg 25743d73cf1aSSagi Grimberg static int 25753d73cf1aSSagi Grimberg isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) 25763d73cf1aSSagi Grimberg { 25779e961ae7SSagi Grimberg switch (se_cmd->prot_op) { 25789e961ae7SSagi Grimberg case TARGET_PROT_DIN_INSERT: 25799e961ae7SSagi Grimberg case TARGET_PROT_DOUT_STRIP: 258078eda2bbSSagi Grimberg sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; 25813d73cf1aSSagi Grimberg isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); 25829e961ae7SSagi Grimberg break; 25839e961ae7SSagi Grimberg case TARGET_PROT_DOUT_INSERT: 25849e961ae7SSagi Grimberg case TARGET_PROT_DIN_STRIP: 258578eda2bbSSagi Grimberg sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; 25863d73cf1aSSagi Grimberg isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); 25879e961ae7SSagi Grimberg break; 25889e961ae7SSagi Grimberg case TARGET_PROT_DIN_PASS: 25899e961ae7SSagi Grimberg case TARGET_PROT_DOUT_PASS: 25903d73cf1aSSagi Grimberg isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); 25913d73cf1aSSagi Grimberg isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); 25929e961ae7SSagi Grimberg break; 25939e961ae7SSagi Grimberg default: 25949e961ae7SSagi Grimberg pr_err("Unsupported PI operation %d\n", se_cmd->prot_op); 25959e961ae7SSagi Grimberg return -EINVAL; 25969e961ae7SSagi Grimberg } 25979e961ae7SSagi Grimberg 25989e961ae7SSagi Grimberg return 0; 25999e961ae7SSagi Grimberg } 26009e961ae7SSagi Grimberg 26019e961ae7SSagi Grimberg static inline u8 26029e961ae7SSagi Grimberg isert_set_prot_checks(u8 prot_checks) 26039e961ae7SSagi Grimberg { 26049e961ae7SSagi Grimberg return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | 26059e961ae7SSagi Grimberg (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | 26069e961ae7SSagi Grimberg (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); 26079e961ae7SSagi Grimberg } 26089e961ae7SSagi Grimberg 26099e961ae7SSagi Grimberg static int 2610570db170SSagi Grimberg isert_reg_sig_mr(struct isert_conn *isert_conn, 2611570db170SSagi Grimberg struct se_cmd *se_cmd, 2612570db170SSagi Grimberg struct isert_rdma_wr *rdma_wr, 2613570db170SSagi Grimberg struct fast_reg_descriptor *fr_desc) 26149e961ae7SSagi Grimberg { 26159e961ae7SSagi Grimberg struct ib_send_wr sig_wr, inv_wr; 26169e961ae7SSagi Grimberg struct ib_send_wr *bad_wr, *wr = NULL; 26179e961ae7SSagi Grimberg struct pi_context *pi_ctx = fr_desc->pi_ctx; 26189e961ae7SSagi Grimberg struct ib_sig_attrs sig_attrs; 26199e961ae7SSagi Grimberg int ret; 26209e961ae7SSagi Grimberg u32 key; 26219e961ae7SSagi Grimberg 26229e961ae7SSagi Grimberg memset(&sig_attrs, 0, sizeof(sig_attrs)); 26239e961ae7SSagi Grimberg ret = isert_set_sig_attrs(se_cmd, &sig_attrs); 26249e961ae7SSagi Grimberg if (ret) 26259e961ae7SSagi Grimberg goto err; 26269e961ae7SSagi Grimberg 26279e961ae7SSagi Grimberg sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); 26289e961ae7SSagi Grimberg 26299e961ae7SSagi Grimberg if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { 26309e961ae7SSagi Grimberg memset(&inv_wr, 0, sizeof(inv_wr)); 26319e961ae7SSagi Grimberg inv_wr.opcode = IB_WR_LOCAL_INV; 2632c2caa207SSagi Grimberg inv_wr.wr_id = ISER_FASTREG_LI_WRID; 26339e961ae7SSagi Grimberg inv_wr.ex.invalidate_rkey = pi_ctx->sig_mr->rkey; 26349e961ae7SSagi Grimberg wr = &inv_wr; 26359e961ae7SSagi Grimberg /* Bump the key */ 26369e961ae7SSagi Grimberg key = (u8)(pi_ctx->sig_mr->rkey & 0x000000FF); 26379e961ae7SSagi Grimberg ib_update_fast_reg_key(pi_ctx->sig_mr, ++key); 26389e961ae7SSagi Grimberg } 26399e961ae7SSagi Grimberg 26409e961ae7SSagi Grimberg memset(&sig_wr, 0, sizeof(sig_wr)); 26419e961ae7SSagi Grimberg sig_wr.opcode = IB_WR_REG_SIG_MR; 2642c2caa207SSagi Grimberg sig_wr.wr_id = ISER_FASTREG_LI_WRID; 2643570db170SSagi Grimberg sig_wr.sg_list = &rdma_wr->ib_sg[DATA]; 26449e961ae7SSagi Grimberg sig_wr.num_sge = 1; 26459e961ae7SSagi Grimberg sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE; 26469e961ae7SSagi Grimberg sig_wr.wr.sig_handover.sig_attrs = &sig_attrs; 26479e961ae7SSagi Grimberg sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr; 26489e961ae7SSagi Grimberg if (se_cmd->t_prot_sg) 2649570db170SSagi Grimberg sig_wr.wr.sig_handover.prot = &rdma_wr->ib_sg[PROT]; 26509e961ae7SSagi Grimberg 26519e961ae7SSagi Grimberg if (!wr) 26529e961ae7SSagi Grimberg wr = &sig_wr; 26539e961ae7SSagi Grimberg else 26549e961ae7SSagi Grimberg wr->next = &sig_wr; 26559e961ae7SSagi Grimberg 26569e961ae7SSagi Grimberg ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr); 26579e961ae7SSagi Grimberg if (ret) { 26589e961ae7SSagi Grimberg pr_err("fast registration failed, ret:%d\n", ret); 26599e961ae7SSagi Grimberg goto err; 26609e961ae7SSagi Grimberg } 26619e961ae7SSagi Grimberg fr_desc->ind &= ~ISERT_SIG_KEY_VALID; 26629e961ae7SSagi Grimberg 2663570db170SSagi Grimberg rdma_wr->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey; 2664570db170SSagi Grimberg rdma_wr->ib_sg[SIG].addr = 0; 2665570db170SSagi Grimberg rdma_wr->ib_sg[SIG].length = se_cmd->data_length; 26669e961ae7SSagi Grimberg if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && 26679e961ae7SSagi Grimberg se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) 26689e961ae7SSagi Grimberg /* 26699e961ae7SSagi Grimberg * We have protection guards on the wire 26709e961ae7SSagi Grimberg * so we need to set a larget transfer 26719e961ae7SSagi Grimberg */ 2672570db170SSagi Grimberg rdma_wr->ib_sg[SIG].length += se_cmd->prot_length; 26739e961ae7SSagi Grimberg 26749e961ae7SSagi Grimberg pr_debug("sig_sge: addr: 0x%llx length: %u lkey: %x\n", 2675570db170SSagi Grimberg rdma_wr->ib_sg[SIG].addr, rdma_wr->ib_sg[SIG].length, 2676570db170SSagi Grimberg rdma_wr->ib_sg[SIG].lkey); 26779e961ae7SSagi Grimberg err: 26789e961ae7SSagi Grimberg return ret; 26799e961ae7SSagi Grimberg } 26809e961ae7SSagi Grimberg 268159464ef4SVu Pham static int 2682570db170SSagi Grimberg isert_handle_prot_cmd(struct isert_conn *isert_conn, 2683570db170SSagi Grimberg struct isert_cmd *isert_cmd, 2684570db170SSagi Grimberg struct isert_rdma_wr *wr) 2685570db170SSagi Grimberg { 2686570db170SSagi Grimberg struct isert_device *device = isert_conn->conn_device; 2687570db170SSagi Grimberg struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd; 2688570db170SSagi Grimberg int ret; 2689570db170SSagi Grimberg 2690570db170SSagi Grimberg if (!wr->fr_desc->pi_ctx) { 2691570db170SSagi Grimberg ret = isert_create_pi_ctx(wr->fr_desc, 2692570db170SSagi Grimberg device->ib_device, 2693570db170SSagi Grimberg isert_conn->conn_pd); 2694570db170SSagi Grimberg if (ret) { 2695570db170SSagi Grimberg pr_err("conn %p failed to allocate pi_ctx\n", 2696570db170SSagi Grimberg isert_conn); 2697570db170SSagi Grimberg return ret; 2698570db170SSagi Grimberg } 2699570db170SSagi Grimberg } 2700570db170SSagi Grimberg 2701570db170SSagi Grimberg if (se_cmd->t_prot_sg) { 2702570db170SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, 2703570db170SSagi Grimberg se_cmd->t_prot_sg, 2704570db170SSagi Grimberg se_cmd->t_prot_nents, 2705570db170SSagi Grimberg se_cmd->prot_length, 2706570db170SSagi Grimberg 0, wr->iser_ib_op, &wr->prot); 2707570db170SSagi Grimberg if (ret) { 2708570db170SSagi Grimberg pr_err("conn %p failed to map protection buffer\n", 2709570db170SSagi Grimberg isert_conn); 2710570db170SSagi Grimberg return ret; 2711570db170SSagi Grimberg } 2712570db170SSagi Grimberg 2713570db170SSagi Grimberg memset(&wr->ib_sg[PROT], 0, sizeof(wr->ib_sg[PROT])); 2714570db170SSagi Grimberg ret = isert_fast_reg_mr(isert_conn, wr->fr_desc, &wr->prot, 2715570db170SSagi Grimberg ISERT_PROT_KEY_VALID, &wr->ib_sg[PROT]); 2716570db170SSagi Grimberg if (ret) { 2717570db170SSagi Grimberg pr_err("conn %p failed to fast reg mr\n", 2718570db170SSagi Grimberg isert_conn); 2719570db170SSagi Grimberg goto unmap_prot_cmd; 2720570db170SSagi Grimberg } 2721570db170SSagi Grimberg } 2722570db170SSagi Grimberg 2723570db170SSagi Grimberg ret = isert_reg_sig_mr(isert_conn, se_cmd, wr, wr->fr_desc); 2724570db170SSagi Grimberg if (ret) { 2725570db170SSagi Grimberg pr_err("conn %p failed to fast reg mr\n", 2726570db170SSagi Grimberg isert_conn); 2727570db170SSagi Grimberg goto unmap_prot_cmd; 2728570db170SSagi Grimberg } 2729570db170SSagi Grimberg wr->fr_desc->ind |= ISERT_PROTECTED; 2730570db170SSagi Grimberg 2731570db170SSagi Grimberg return 0; 2732570db170SSagi Grimberg 2733570db170SSagi Grimberg unmap_prot_cmd: 2734570db170SSagi Grimberg if (se_cmd->t_prot_sg) 2735570db170SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->prot); 2736570db170SSagi Grimberg 2737570db170SSagi Grimberg return ret; 2738570db170SSagi Grimberg } 2739570db170SSagi Grimberg 2740570db170SSagi Grimberg static int 2741a3a5a826SSagi Grimberg isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 274259464ef4SVu Pham struct isert_rdma_wr *wr) 274359464ef4SVu Pham { 274459464ef4SVu Pham struct se_cmd *se_cmd = &cmd->se_cmd; 274559464ef4SVu Pham struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2746e3d7e4c3SSagi Grimberg struct isert_conn *isert_conn = conn->context; 2747e3d7e4c3SSagi Grimberg struct fast_reg_descriptor *fr_desc = NULL; 2748570db170SSagi Grimberg struct ib_send_wr *send_wr; 2749570db170SSagi Grimberg struct ib_sge *ib_sg; 2750e3d7e4c3SSagi Grimberg u32 offset; 2751e3d7e4c3SSagi Grimberg int ret = 0; 275259464ef4SVu Pham unsigned long flags; 275359464ef4SVu Pham 275459464ef4SVu Pham isert_cmd->tx_desc.isert_cmd = isert_cmd; 2755e3d7e4c3SSagi Grimberg 2756e3d7e4c3SSagi Grimberg offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; 2757e3d7e4c3SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, 2758e3d7e4c3SSagi Grimberg se_cmd->t_data_nents, se_cmd->data_length, 2759e3d7e4c3SSagi Grimberg offset, wr->iser_ib_op, &wr->data); 2760e3d7e4c3SSagi Grimberg if (ret) 2761e3d7e4c3SSagi Grimberg return ret; 2762e3d7e4c3SSagi Grimberg 2763302cc7c3SSagi Grimberg if (wr->data.dma_nents != 1 || isert_prot_cmd(isert_conn, se_cmd)) { 2764e3d7e4c3SSagi Grimberg spin_lock_irqsave(&isert_conn->conn_lock, flags); 2765e3d7e4c3SSagi Grimberg fr_desc = list_first_entry(&isert_conn->conn_fr_pool, 2766e3d7e4c3SSagi Grimberg struct fast_reg_descriptor, list); 2767e3d7e4c3SSagi Grimberg list_del(&fr_desc->list); 2768e3d7e4c3SSagi Grimberg spin_unlock_irqrestore(&isert_conn->conn_lock, flags); 2769e3d7e4c3SSagi Grimberg wr->fr_desc = fr_desc; 277059464ef4SVu Pham } 277159464ef4SVu Pham 27729e961ae7SSagi Grimberg ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, 2773570db170SSagi Grimberg ISERT_DATA_KEY_VALID, &wr->ib_sg[DATA]); 2774e3d7e4c3SSagi Grimberg if (ret) 2775e3d7e4c3SSagi Grimberg goto unmap_cmd; 277659464ef4SVu Pham 2777302cc7c3SSagi Grimberg if (isert_prot_cmd(isert_conn, se_cmd)) { 2778570db170SSagi Grimberg ret = isert_handle_prot_cmd(isert_conn, isert_cmd, wr); 27799e961ae7SSagi Grimberg if (ret) 27809e961ae7SSagi Grimberg goto unmap_cmd; 27819e961ae7SSagi Grimberg 2782570db170SSagi Grimberg ib_sg = &wr->ib_sg[SIG]; 2783570db170SSagi Grimberg } else { 2784570db170SSagi Grimberg ib_sg = &wr->ib_sg[DATA]; 27859e961ae7SSagi Grimberg } 27869e961ae7SSagi Grimberg 2787570db170SSagi Grimberg memcpy(&wr->s_ib_sge, ib_sg, sizeof(*ib_sg)); 2788e3d7e4c3SSagi Grimberg wr->ib_sge = &wr->s_ib_sge; 278959464ef4SVu Pham wr->send_wr_num = 1; 279059464ef4SVu Pham memset(&wr->s_send_wr, 0, sizeof(*send_wr)); 279159464ef4SVu Pham wr->send_wr = &wr->s_send_wr; 279259464ef4SVu Pham wr->isert_cmd = isert_cmd; 279359464ef4SVu Pham 279459464ef4SVu Pham send_wr = &isert_cmd->rdma_wr.s_send_wr; 2795e3d7e4c3SSagi Grimberg send_wr->sg_list = &wr->s_ib_sge; 279659464ef4SVu Pham send_wr->num_sge = 1; 2797b0a191e7SSagi Grimberg send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; 279859464ef4SVu Pham if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { 279959464ef4SVu Pham send_wr->opcode = IB_WR_RDMA_WRITE; 280059464ef4SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->read_va; 280159464ef4SVu Pham send_wr->wr.rdma.rkey = isert_cmd->read_stag; 2802302cc7c3SSagi Grimberg send_wr->send_flags = !isert_prot_cmd(isert_conn, se_cmd) ? 28039e961ae7SSagi Grimberg 0 : IB_SEND_SIGNALED; 280459464ef4SVu Pham } else { 280559464ef4SVu Pham send_wr->opcode = IB_WR_RDMA_READ; 280659464ef4SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->write_va; 280759464ef4SVu Pham send_wr->wr.rdma.rkey = isert_cmd->write_stag; 280859464ef4SVu Pham send_wr->send_flags = IB_SEND_SIGNALED; 280959464ef4SVu Pham } 281059464ef4SVu Pham 281159464ef4SVu Pham return 0; 2812570db170SSagi Grimberg 2813e3d7e4c3SSagi Grimberg unmap_cmd: 2814e3d7e4c3SSagi Grimberg if (fr_desc) { 2815e3d7e4c3SSagi Grimberg spin_lock_irqsave(&isert_conn->conn_lock, flags); 2816e3d7e4c3SSagi Grimberg list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); 2817e3d7e4c3SSagi Grimberg spin_unlock_irqrestore(&isert_conn->conn_lock, flags); 2818e3d7e4c3SSagi Grimberg } 2819e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 282059464ef4SVu Pham 282159464ef4SVu Pham return ret; 282259464ef4SVu Pham } 282359464ef4SVu Pham 282459464ef4SVu Pham static int 282590ecc6e2SVu Pham isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) 282690ecc6e2SVu Pham { 282790ecc6e2SVu Pham struct se_cmd *se_cmd = &cmd->se_cmd; 282859464ef4SVu Pham struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 282990ecc6e2SVu Pham struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 283090ecc6e2SVu Pham struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2831d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 283290ecc6e2SVu Pham struct ib_send_wr *wr_failed; 283390ecc6e2SVu Pham int rc; 283490ecc6e2SVu Pham 283590ecc6e2SVu Pham pr_debug("Cmd: %p RDMA_WRITE data_length: %u\n", 283690ecc6e2SVu Pham isert_cmd, se_cmd->data_length); 283790ecc6e2SVu Pham wr->iser_ib_op = ISER_IB_RDMA_WRITE; 2838d40945d8SVu Pham rc = device->reg_rdma_mem(conn, cmd, wr); 283990ecc6e2SVu Pham if (rc) { 284090ecc6e2SVu Pham pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); 284190ecc6e2SVu Pham return rc; 284290ecc6e2SVu Pham } 284390ecc6e2SVu Pham 2844302cc7c3SSagi Grimberg if (!isert_prot_cmd(isert_conn, se_cmd)) { 2845b8d26b3bSNicholas Bellinger /* 2846b8d26b3bSNicholas Bellinger * Build isert_conn->tx_desc for iSCSI response PDU and attach 2847b8d26b3bSNicholas Bellinger */ 28489e961ae7SSagi Grimberg isert_create_send_desc(isert_conn, isert_cmd, 28499e961ae7SSagi Grimberg &isert_cmd->tx_desc); 285004d9cd12SNicholas Bellinger iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) 2851b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2852b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 285395b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, 285468a86deeSSagi Grimberg &isert_cmd->tx_desc.send_wr); 28559e961ae7SSagi Grimberg isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr; 2856897bb2c9SSagi Grimberg wr->send_wr_num += 1; 28579e961ae7SSagi Grimberg } 2858b8d26b3bSNicholas Bellinger 2859b8d26b3bSNicholas Bellinger rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); 2860*bdf20e72SSagi Grimberg if (rc) 2861b8d26b3bSNicholas Bellinger pr_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); 28629e961ae7SSagi Grimberg 2863302cc7c3SSagi Grimberg if (!isert_prot_cmd(isert_conn, se_cmd)) 28649e961ae7SSagi Grimberg pr_debug("Cmd: %p posted RDMA_WRITE + Response for iSER Data " 28659e961ae7SSagi Grimberg "READ\n", isert_cmd); 28669e961ae7SSagi Grimberg else 28679e961ae7SSagi Grimberg pr_debug("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", 286890ecc6e2SVu Pham isert_cmd); 2869b8d26b3bSNicholas Bellinger 287090ecc6e2SVu Pham return 1; 2871b8d26b3bSNicholas Bellinger } 2872b8d26b3bSNicholas Bellinger 2873b8d26b3bSNicholas Bellinger static int 2874b8d26b3bSNicholas Bellinger isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) 2875b8d26b3bSNicholas Bellinger { 2876b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 2877d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2878b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 2879b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2880d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 288190ecc6e2SVu Pham struct ib_send_wr *wr_failed; 288290ecc6e2SVu Pham int rc; 2883b8d26b3bSNicholas Bellinger 288490ecc6e2SVu Pham pr_debug("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", 288590ecc6e2SVu Pham isert_cmd, se_cmd->data_length, cmd->write_data_done); 2886b8d26b3bSNicholas Bellinger wr->iser_ib_op = ISER_IB_RDMA_READ; 2887d40945d8SVu Pham rc = device->reg_rdma_mem(conn, cmd, wr); 288890ecc6e2SVu Pham if (rc) { 288990ecc6e2SVu Pham pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); 289090ecc6e2SVu Pham return rc; 2891b8d26b3bSNicholas Bellinger } 2892b8d26b3bSNicholas Bellinger 2893b8d26b3bSNicholas Bellinger rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); 2894*bdf20e72SSagi Grimberg if (rc) 2895b8d26b3bSNicholas Bellinger pr_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); 2896*bdf20e72SSagi Grimberg 289790ecc6e2SVu Pham pr_debug("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", 289890ecc6e2SVu Pham isert_cmd); 2899b8d26b3bSNicholas Bellinger 290090ecc6e2SVu Pham return 0; 2901b8d26b3bSNicholas Bellinger } 2902b8d26b3bSNicholas Bellinger 2903b8d26b3bSNicholas Bellinger static int 2904b8d26b3bSNicholas Bellinger isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) 2905b8d26b3bSNicholas Bellinger { 2906b8d26b3bSNicholas Bellinger int ret; 2907b8d26b3bSNicholas Bellinger 2908b8d26b3bSNicholas Bellinger switch (state) { 2909b8d26b3bSNicholas Bellinger case ISTATE_SEND_NOPIN_WANT_RESPONSE: 2910b8d26b3bSNicholas Bellinger ret = isert_put_nopin(cmd, conn, false); 2911b8d26b3bSNicholas Bellinger break; 2912b8d26b3bSNicholas Bellinger default: 2913b8d26b3bSNicholas Bellinger pr_err("Unknown immediate state: 0x%02x\n", state); 2914b8d26b3bSNicholas Bellinger ret = -EINVAL; 2915b8d26b3bSNicholas Bellinger break; 2916b8d26b3bSNicholas Bellinger } 2917b8d26b3bSNicholas Bellinger 2918b8d26b3bSNicholas Bellinger return ret; 2919b8d26b3bSNicholas Bellinger } 2920b8d26b3bSNicholas Bellinger 2921b8d26b3bSNicholas Bellinger static int 2922b8d26b3bSNicholas Bellinger isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) 2923b8d26b3bSNicholas Bellinger { 2924b8d26b3bSNicholas Bellinger int ret; 2925b8d26b3bSNicholas Bellinger 2926b8d26b3bSNicholas Bellinger switch (state) { 2927b8d26b3bSNicholas Bellinger case ISTATE_SEND_LOGOUTRSP: 2928b8d26b3bSNicholas Bellinger ret = isert_put_logout_rsp(cmd, conn); 2929b8d26b3bSNicholas Bellinger if (!ret) { 2930b8d26b3bSNicholas Bellinger pr_debug("Returning iSER Logout -EAGAIN\n"); 2931b8d26b3bSNicholas Bellinger ret = -EAGAIN; 2932b8d26b3bSNicholas Bellinger } 2933b8d26b3bSNicholas Bellinger break; 2934b8d26b3bSNicholas Bellinger case ISTATE_SEND_NOPIN: 2935b8d26b3bSNicholas Bellinger ret = isert_put_nopin(cmd, conn, true); 2936b8d26b3bSNicholas Bellinger break; 2937b8d26b3bSNicholas Bellinger case ISTATE_SEND_TASKMGTRSP: 2938b8d26b3bSNicholas Bellinger ret = isert_put_tm_rsp(cmd, conn); 2939b8d26b3bSNicholas Bellinger break; 2940b8d26b3bSNicholas Bellinger case ISTATE_SEND_REJECT: 2941b8d26b3bSNicholas Bellinger ret = isert_put_reject(cmd, conn); 2942b8d26b3bSNicholas Bellinger break; 2943adb54c29SNicholas Bellinger case ISTATE_SEND_TEXTRSP: 2944adb54c29SNicholas Bellinger ret = isert_put_text_rsp(cmd, conn); 2945adb54c29SNicholas Bellinger break; 2946b8d26b3bSNicholas Bellinger case ISTATE_SEND_STATUS: 2947b8d26b3bSNicholas Bellinger /* 2948b8d26b3bSNicholas Bellinger * Special case for sending non GOOD SCSI status from TX thread 2949b8d26b3bSNicholas Bellinger * context during pre se_cmd excecution failure. 2950b8d26b3bSNicholas Bellinger */ 2951b8d26b3bSNicholas Bellinger ret = isert_put_response(conn, cmd); 2952b8d26b3bSNicholas Bellinger break; 2953b8d26b3bSNicholas Bellinger default: 2954b8d26b3bSNicholas Bellinger pr_err("Unknown response state: 0x%02x\n", state); 2955b8d26b3bSNicholas Bellinger ret = -EINVAL; 2956b8d26b3bSNicholas Bellinger break; 2957b8d26b3bSNicholas Bellinger } 2958b8d26b3bSNicholas Bellinger 2959b8d26b3bSNicholas Bellinger return ret; 2960b8d26b3bSNicholas Bellinger } 2961b8d26b3bSNicholas Bellinger 2962ca6c1d82SSagi Grimberg struct rdma_cm_id * 2963ca6c1d82SSagi Grimberg isert_setup_id(struct isert_np *isert_np) 2964ca6c1d82SSagi Grimberg { 2965ca6c1d82SSagi Grimberg struct iscsi_np *np = isert_np->np; 2966ca6c1d82SSagi Grimberg struct rdma_cm_id *id; 2967ca6c1d82SSagi Grimberg struct sockaddr *sa; 2968ca6c1d82SSagi Grimberg int ret; 2969ca6c1d82SSagi Grimberg 2970ca6c1d82SSagi Grimberg sa = (struct sockaddr *)&np->np_sockaddr; 2971ca6c1d82SSagi Grimberg pr_debug("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); 2972ca6c1d82SSagi Grimberg 2973ca6c1d82SSagi Grimberg id = rdma_create_id(isert_cma_handler, isert_np, 2974ca6c1d82SSagi Grimberg RDMA_PS_TCP, IB_QPT_RC); 2975ca6c1d82SSagi Grimberg if (IS_ERR(id)) { 2976ca6c1d82SSagi Grimberg pr_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); 2977ca6c1d82SSagi Grimberg ret = PTR_ERR(id); 2978ca6c1d82SSagi Grimberg goto out; 2979ca6c1d82SSagi Grimberg } 2980ca6c1d82SSagi Grimberg pr_debug("id %p context %p\n", id, id->context); 2981ca6c1d82SSagi Grimberg 2982ca6c1d82SSagi Grimberg ret = rdma_bind_addr(id, sa); 2983ca6c1d82SSagi Grimberg if (ret) { 2984ca6c1d82SSagi Grimberg pr_err("rdma_bind_addr() failed: %d\n", ret); 2985ca6c1d82SSagi Grimberg goto out_id; 2986ca6c1d82SSagi Grimberg } 2987ca6c1d82SSagi Grimberg 2988ca6c1d82SSagi Grimberg ret = rdma_listen(id, ISERT_RDMA_LISTEN_BACKLOG); 2989ca6c1d82SSagi Grimberg if (ret) { 2990ca6c1d82SSagi Grimberg pr_err("rdma_listen() failed: %d\n", ret); 2991ca6c1d82SSagi Grimberg goto out_id; 2992ca6c1d82SSagi Grimberg } 2993ca6c1d82SSagi Grimberg 2994ca6c1d82SSagi Grimberg return id; 2995ca6c1d82SSagi Grimberg out_id: 2996ca6c1d82SSagi Grimberg rdma_destroy_id(id); 2997ca6c1d82SSagi Grimberg out: 2998ca6c1d82SSagi Grimberg return ERR_PTR(ret); 2999ca6c1d82SSagi Grimberg } 3000ca6c1d82SSagi Grimberg 3001b8d26b3bSNicholas Bellinger static int 3002b8d26b3bSNicholas Bellinger isert_setup_np(struct iscsi_np *np, 3003b8d26b3bSNicholas Bellinger struct __kernel_sockaddr_storage *ksockaddr) 3004b8d26b3bSNicholas Bellinger { 3005b8d26b3bSNicholas Bellinger struct isert_np *isert_np; 3006b8d26b3bSNicholas Bellinger struct rdma_cm_id *isert_lid; 3007b8d26b3bSNicholas Bellinger int ret; 3008b8d26b3bSNicholas Bellinger 3009b8d26b3bSNicholas Bellinger isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); 3010b8d26b3bSNicholas Bellinger if (!isert_np) { 3011b8d26b3bSNicholas Bellinger pr_err("Unable to allocate struct isert_np\n"); 3012b8d26b3bSNicholas Bellinger return -ENOMEM; 3013b8d26b3bSNicholas Bellinger } 3014531b7bf4SSagi Grimberg sema_init(&isert_np->np_sem, 0); 3015b8d26b3bSNicholas Bellinger mutex_init(&isert_np->np_accept_mutex); 3016b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&isert_np->np_accept_list); 3017b8d26b3bSNicholas Bellinger init_completion(&isert_np->np_login_comp); 3018ca6c1d82SSagi Grimberg isert_np->np = np; 3019b8d26b3bSNicholas Bellinger 3020b8d26b3bSNicholas Bellinger /* 3021b8d26b3bSNicholas Bellinger * Setup the np->np_sockaddr from the passed sockaddr setup 3022b8d26b3bSNicholas Bellinger * in iscsi_target_configfs.c code.. 3023b8d26b3bSNicholas Bellinger */ 3024b8d26b3bSNicholas Bellinger memcpy(&np->np_sockaddr, ksockaddr, 3025b8d26b3bSNicholas Bellinger sizeof(struct __kernel_sockaddr_storage)); 3026b8d26b3bSNicholas Bellinger 3027ca6c1d82SSagi Grimberg isert_lid = isert_setup_id(isert_np); 3028b8d26b3bSNicholas Bellinger if (IS_ERR(isert_lid)) { 3029b8d26b3bSNicholas Bellinger ret = PTR_ERR(isert_lid); 3030b8d26b3bSNicholas Bellinger goto out; 3031b8d26b3bSNicholas Bellinger } 3032b8d26b3bSNicholas Bellinger 3033b8d26b3bSNicholas Bellinger isert_np->np_cm_id = isert_lid; 3034b8d26b3bSNicholas Bellinger np->np_context = isert_np; 3035b8d26b3bSNicholas Bellinger 3036b8d26b3bSNicholas Bellinger return 0; 3037b8d26b3bSNicholas Bellinger 3038b8d26b3bSNicholas Bellinger out: 3039b8d26b3bSNicholas Bellinger kfree(isert_np); 3040ca6c1d82SSagi Grimberg 3041b8d26b3bSNicholas Bellinger return ret; 3042b8d26b3bSNicholas Bellinger } 3043b8d26b3bSNicholas Bellinger 3044b8d26b3bSNicholas Bellinger static int 3045b8d26b3bSNicholas Bellinger isert_rdma_accept(struct isert_conn *isert_conn) 3046b8d26b3bSNicholas Bellinger { 3047b8d26b3bSNicholas Bellinger struct rdma_cm_id *cm_id = isert_conn->conn_cm_id; 3048b8d26b3bSNicholas Bellinger struct rdma_conn_param cp; 3049b8d26b3bSNicholas Bellinger int ret; 3050b8d26b3bSNicholas Bellinger 3051b8d26b3bSNicholas Bellinger memset(&cp, 0, sizeof(struct rdma_conn_param)); 3052b8d26b3bSNicholas Bellinger cp.initiator_depth = isert_conn->initiator_depth; 3053b8d26b3bSNicholas Bellinger cp.retry_count = 7; 3054b8d26b3bSNicholas Bellinger cp.rnr_retry_count = 7; 3055b8d26b3bSNicholas Bellinger 3056b8d26b3bSNicholas Bellinger pr_debug("Before rdma_accept >>>>>>>>>>>>>>>>>>>>.\n"); 3057b8d26b3bSNicholas Bellinger 3058b8d26b3bSNicholas Bellinger ret = rdma_accept(cm_id, &cp); 3059b8d26b3bSNicholas Bellinger if (ret) { 3060b8d26b3bSNicholas Bellinger pr_err("rdma_accept() failed with: %d\n", ret); 3061b8d26b3bSNicholas Bellinger return ret; 3062b8d26b3bSNicholas Bellinger } 3063b8d26b3bSNicholas Bellinger 3064b8d26b3bSNicholas Bellinger pr_debug("After rdma_accept >>>>>>>>>>>>>>>>>>>>>.\n"); 3065b8d26b3bSNicholas Bellinger 3066b8d26b3bSNicholas Bellinger return 0; 3067b8d26b3bSNicholas Bellinger } 3068b8d26b3bSNicholas Bellinger 3069b8d26b3bSNicholas Bellinger static int 3070b8d26b3bSNicholas Bellinger isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) 3071b8d26b3bSNicholas Bellinger { 3072b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 3073b8d26b3bSNicholas Bellinger int ret; 3074b8d26b3bSNicholas Bellinger 30752371e5daSSagi Grimberg pr_info("before login_req comp conn: %p\n", isert_conn); 30762371e5daSSagi Grimberg ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); 30772371e5daSSagi Grimberg if (ret) { 30782371e5daSSagi Grimberg pr_err("isert_conn %p interrupted before got login req\n", 30792371e5daSSagi Grimberg isert_conn); 30802371e5daSSagi Grimberg return ret; 30812371e5daSSagi Grimberg } 30822371e5daSSagi Grimberg reinit_completion(&isert_conn->login_req_comp); 30832371e5daSSagi Grimberg 30846faaa85fSNicholas Bellinger /* 30856faaa85fSNicholas Bellinger * For login requests after the first PDU, isert_rx_login_req() will 30866faaa85fSNicholas Bellinger * kick schedule_delayed_work(&conn->login_work) as the packet is 30876faaa85fSNicholas Bellinger * received, which turns this callback from iscsi_target_do_login_rx() 30886faaa85fSNicholas Bellinger * into a NOP. 30896faaa85fSNicholas Bellinger */ 30906faaa85fSNicholas Bellinger if (!login->first_request) 30916faaa85fSNicholas Bellinger return 0; 3092b8d26b3bSNicholas Bellinger 30932371e5daSSagi Grimberg isert_rx_login_req(isert_conn); 30942371e5daSSagi Grimberg 30952371e5daSSagi Grimberg pr_info("before conn_login_comp conn: %p\n", conn); 3096b8d26b3bSNicholas Bellinger ret = wait_for_completion_interruptible(&isert_conn->conn_login_comp); 3097b8d26b3bSNicholas Bellinger if (ret) 3098b8d26b3bSNicholas Bellinger return ret; 3099b8d26b3bSNicholas Bellinger 31002371e5daSSagi Grimberg pr_info("processing login->req: %p\n", login->req); 31012371e5daSSagi Grimberg 3102b8d26b3bSNicholas Bellinger return 0; 3103b8d26b3bSNicholas Bellinger } 3104b8d26b3bSNicholas Bellinger 3105b8d26b3bSNicholas Bellinger static void 3106b8d26b3bSNicholas Bellinger isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, 3107b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn) 3108b8d26b3bSNicholas Bellinger { 3109b8d26b3bSNicholas Bellinger struct rdma_cm_id *cm_id = isert_conn->conn_cm_id; 3110b8d26b3bSNicholas Bellinger struct rdma_route *cm_route = &cm_id->route; 3111b8d26b3bSNicholas Bellinger struct sockaddr_in *sock_in; 3112b8d26b3bSNicholas Bellinger struct sockaddr_in6 *sock_in6; 3113b8d26b3bSNicholas Bellinger 3114b8d26b3bSNicholas Bellinger conn->login_family = np->np_sockaddr.ss_family; 3115b8d26b3bSNicholas Bellinger 3116b8d26b3bSNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 3117b8d26b3bSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.dst_addr; 3118b8d26b3bSNicholas Bellinger snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c", 3119b8d26b3bSNicholas Bellinger &sock_in6->sin6_addr.in6_u); 3120b8d26b3bSNicholas Bellinger conn->login_port = ntohs(sock_in6->sin6_port); 3121b8d26b3bSNicholas Bellinger 3122b8d26b3bSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.src_addr; 3123b8d26b3bSNicholas Bellinger snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c", 3124b8d26b3bSNicholas Bellinger &sock_in6->sin6_addr.in6_u); 3125b8d26b3bSNicholas Bellinger conn->local_port = ntohs(sock_in6->sin6_port); 3126b8d26b3bSNicholas Bellinger } else { 3127b8d26b3bSNicholas Bellinger sock_in = (struct sockaddr_in *)&cm_route->addr.dst_addr; 3128b8d26b3bSNicholas Bellinger sprintf(conn->login_ip, "%pI4", 3129b8d26b3bSNicholas Bellinger &sock_in->sin_addr.s_addr); 3130b8d26b3bSNicholas Bellinger conn->login_port = ntohs(sock_in->sin_port); 3131b8d26b3bSNicholas Bellinger 3132b8d26b3bSNicholas Bellinger sock_in = (struct sockaddr_in *)&cm_route->addr.src_addr; 3133b8d26b3bSNicholas Bellinger sprintf(conn->local_ip, "%pI4", 3134b8d26b3bSNicholas Bellinger &sock_in->sin_addr.s_addr); 3135b8d26b3bSNicholas Bellinger conn->local_port = ntohs(sock_in->sin_port); 3136b8d26b3bSNicholas Bellinger } 3137b8d26b3bSNicholas Bellinger } 3138b8d26b3bSNicholas Bellinger 3139b8d26b3bSNicholas Bellinger static int 3140b8d26b3bSNicholas Bellinger isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) 3141b8d26b3bSNicholas Bellinger { 3142b8d26b3bSNicholas Bellinger struct isert_np *isert_np = (struct isert_np *)np->np_context; 3143b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 3144b8d26b3bSNicholas Bellinger int max_accept = 0, ret; 3145b8d26b3bSNicholas Bellinger 3146b8d26b3bSNicholas Bellinger accept_wait: 3147531b7bf4SSagi Grimberg ret = down_interruptible(&isert_np->np_sem); 31481acff63fSSagi Grimberg if (ret || max_accept > 5) 3149b8d26b3bSNicholas Bellinger return -ENODEV; 3150b8d26b3bSNicholas Bellinger 3151b8d26b3bSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 3152e346ab34SSagi Grimberg if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { 3153b8d26b3bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 3154e346ab34SSagi Grimberg pr_debug("np_thread_state %d for isert_accept_np\n", 3155e346ab34SSagi Grimberg np->np_thread_state); 3156e346ab34SSagi Grimberg /** 3157e346ab34SSagi Grimberg * No point in stalling here when np_thread 3158e346ab34SSagi Grimberg * is in state RESET/SHUTDOWN/EXIT - bail 3159e346ab34SSagi Grimberg **/ 3160b8d26b3bSNicholas Bellinger return -ENODEV; 3161b8d26b3bSNicholas Bellinger } 3162b8d26b3bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 3163b8d26b3bSNicholas Bellinger 3164b8d26b3bSNicholas Bellinger mutex_lock(&isert_np->np_accept_mutex); 3165b8d26b3bSNicholas Bellinger if (list_empty(&isert_np->np_accept_list)) { 3166b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 3167b8d26b3bSNicholas Bellinger max_accept++; 3168b8d26b3bSNicholas Bellinger goto accept_wait; 3169b8d26b3bSNicholas Bellinger } 3170b8d26b3bSNicholas Bellinger isert_conn = list_first_entry(&isert_np->np_accept_list, 3171b8d26b3bSNicholas Bellinger struct isert_conn, conn_accept_node); 3172b8d26b3bSNicholas Bellinger list_del_init(&isert_conn->conn_accept_node); 3173b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 3174b8d26b3bSNicholas Bellinger 3175b8d26b3bSNicholas Bellinger conn->context = isert_conn; 3176b8d26b3bSNicholas Bellinger isert_conn->conn = conn; 3177b8d26b3bSNicholas Bellinger max_accept = 0; 3178b8d26b3bSNicholas Bellinger 3179b8d26b3bSNicholas Bellinger isert_set_conn_info(np, conn, isert_conn); 3180b8d26b3bSNicholas Bellinger 31812371e5daSSagi Grimberg pr_debug("Processing isert_conn: %p\n", isert_conn); 31822371e5daSSagi Grimberg 3183b8d26b3bSNicholas Bellinger return 0; 3184b8d26b3bSNicholas Bellinger } 3185b8d26b3bSNicholas Bellinger 3186b8d26b3bSNicholas Bellinger static void 3187b8d26b3bSNicholas Bellinger isert_free_np(struct iscsi_np *np) 3188b8d26b3bSNicholas Bellinger { 3189b8d26b3bSNicholas Bellinger struct isert_np *isert_np = (struct isert_np *)np->np_context; 3190268e6811SSagi Grimberg struct isert_conn *isert_conn, *n; 3191b8d26b3bSNicholas Bellinger 31923b726ae2SSagi Grimberg if (isert_np->np_cm_id) 3193b8d26b3bSNicholas Bellinger rdma_destroy_id(isert_np->np_cm_id); 3194b8d26b3bSNicholas Bellinger 3195268e6811SSagi Grimberg /* 3196268e6811SSagi Grimberg * FIXME: At this point we don't have a good way to insure 3197268e6811SSagi Grimberg * that at this point we don't have hanging connections that 3198268e6811SSagi Grimberg * completed RDMA establishment but didn't start iscsi login 3199268e6811SSagi Grimberg * process. So work-around this by cleaning up what ever piled 3200268e6811SSagi Grimberg * up in np_accept_list. 3201268e6811SSagi Grimberg */ 3202268e6811SSagi Grimberg mutex_lock(&isert_np->np_accept_mutex); 3203268e6811SSagi Grimberg if (!list_empty(&isert_np->np_accept_list)) { 3204268e6811SSagi Grimberg pr_info("Still have isert connections, cleaning up...\n"); 3205268e6811SSagi Grimberg list_for_each_entry_safe(isert_conn, n, 3206268e6811SSagi Grimberg &isert_np->np_accept_list, 3207268e6811SSagi Grimberg conn_accept_node) { 3208268e6811SSagi Grimberg pr_info("cleaning isert_conn %p state (%d)\n", 3209268e6811SSagi Grimberg isert_conn, isert_conn->state); 3210268e6811SSagi Grimberg isert_connect_release(isert_conn); 3211268e6811SSagi Grimberg } 3212268e6811SSagi Grimberg } 3213268e6811SSagi Grimberg mutex_unlock(&isert_np->np_accept_mutex); 3214268e6811SSagi Grimberg 3215b8d26b3bSNicholas Bellinger np->np_context = NULL; 3216b8d26b3bSNicholas Bellinger kfree(isert_np); 3217b8d26b3bSNicholas Bellinger } 3218b8d26b3bSNicholas Bellinger 3219b02efbfcSSagi Grimberg static void isert_release_work(struct work_struct *work) 3220b02efbfcSSagi Grimberg { 3221b02efbfcSSagi Grimberg struct isert_conn *isert_conn = container_of(work, 3222b02efbfcSSagi Grimberg struct isert_conn, 3223b02efbfcSSagi Grimberg release_work); 3224b02efbfcSSagi Grimberg 3225b02efbfcSSagi Grimberg pr_info("Starting release conn %p\n", isert_conn); 3226b02efbfcSSagi Grimberg 3227b02efbfcSSagi Grimberg wait_for_completion(&isert_conn->conn_wait); 3228b02efbfcSSagi Grimberg 3229b02efbfcSSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 3230b02efbfcSSagi Grimberg isert_conn->state = ISER_CONN_DOWN; 3231b02efbfcSSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 3232b02efbfcSSagi Grimberg 3233b02efbfcSSagi Grimberg pr_info("Destroying conn %p\n", isert_conn); 3234b02efbfcSSagi Grimberg isert_put_conn(isert_conn); 3235b02efbfcSSagi Grimberg } 3236b02efbfcSSagi Grimberg 3237*bdf20e72SSagi Grimberg static void 3238*bdf20e72SSagi Grimberg isert_wait4flush(struct isert_conn *isert_conn) 3239*bdf20e72SSagi Grimberg { 3240*bdf20e72SSagi Grimberg struct ib_recv_wr *bad_wr; 3241*bdf20e72SSagi Grimberg 3242*bdf20e72SSagi Grimberg init_completion(&isert_conn->conn_wait_comp_err); 3243*bdf20e72SSagi Grimberg isert_conn->beacon.wr_id = ISER_BEACON_WRID; 3244*bdf20e72SSagi Grimberg /* post an indication that all flush errors were consumed */ 3245*bdf20e72SSagi Grimberg if (ib_post_recv(isert_conn->conn_qp, &isert_conn->beacon, &bad_wr)) { 3246*bdf20e72SSagi Grimberg pr_err("conn %p failed to post beacon", isert_conn); 3247*bdf20e72SSagi Grimberg return; 3248*bdf20e72SSagi Grimberg } 3249*bdf20e72SSagi Grimberg 3250*bdf20e72SSagi Grimberg wait_for_completion(&isert_conn->conn_wait_comp_err); 3251*bdf20e72SSagi Grimberg } 3252*bdf20e72SSagi Grimberg 3253defd8848SNicholas Bellinger static void isert_wait_conn(struct iscsi_conn *conn) 3254b8d26b3bSNicholas Bellinger { 3255b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = conn->context; 3256b8d26b3bSNicholas Bellinger 3257defd8848SNicholas Bellinger pr_debug("isert_wait_conn: Starting \n"); 3258b8d26b3bSNicholas Bellinger 32599d49f5e2SSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 3260b8d26b3bSNicholas Bellinger /* 3261b8d26b3bSNicholas Bellinger * Only wait for conn_wait_comp_err if the isert_conn made it 3262b8d26b3bSNicholas Bellinger * into full feature phase.. 3263b8d26b3bSNicholas Bellinger */ 3264b2cb9649SNicholas Bellinger if (isert_conn->state == ISER_CONN_INIT) { 3265b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 3266b2cb9649SNicholas Bellinger return; 3267b2cb9649SNicholas Bellinger } 3268954f2372SSagi Grimberg isert_conn_terminate(isert_conn); 3269b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 3270b2cb9649SNicholas Bellinger 3271*bdf20e72SSagi Grimberg isert_wait4flush(isert_conn); 3272954f2372SSagi Grimberg 3273b02efbfcSSagi Grimberg INIT_WORK(&isert_conn->release_work, isert_release_work); 3274b02efbfcSSagi Grimberg queue_work(isert_release_wq, &isert_conn->release_work); 3275defd8848SNicholas Bellinger } 3276defd8848SNicholas Bellinger 3277defd8848SNicholas Bellinger static void isert_free_conn(struct iscsi_conn *conn) 3278defd8848SNicholas Bellinger { 3279defd8848SNicholas Bellinger struct isert_conn *isert_conn = conn->context; 3280b8d26b3bSNicholas Bellinger 3281b8d26b3bSNicholas Bellinger isert_put_conn(isert_conn); 3282b8d26b3bSNicholas Bellinger } 3283b8d26b3bSNicholas Bellinger 3284b8d26b3bSNicholas Bellinger static struct iscsit_transport iser_target_transport = { 3285b8d26b3bSNicholas Bellinger .name = "IB/iSER", 3286b8d26b3bSNicholas Bellinger .transport_type = ISCSI_INFINIBAND, 3287d703ce2fSNicholas Bellinger .priv_size = sizeof(struct isert_cmd), 3288b8d26b3bSNicholas Bellinger .owner = THIS_MODULE, 3289b8d26b3bSNicholas Bellinger .iscsit_setup_np = isert_setup_np, 3290b8d26b3bSNicholas Bellinger .iscsit_accept_np = isert_accept_np, 3291b8d26b3bSNicholas Bellinger .iscsit_free_np = isert_free_np, 3292defd8848SNicholas Bellinger .iscsit_wait_conn = isert_wait_conn, 3293b8d26b3bSNicholas Bellinger .iscsit_free_conn = isert_free_conn, 3294b8d26b3bSNicholas Bellinger .iscsit_get_login_rx = isert_get_login_rx, 3295b8d26b3bSNicholas Bellinger .iscsit_put_login_tx = isert_put_login_tx, 3296b8d26b3bSNicholas Bellinger .iscsit_immediate_queue = isert_immediate_queue, 3297b8d26b3bSNicholas Bellinger .iscsit_response_queue = isert_response_queue, 3298b8d26b3bSNicholas Bellinger .iscsit_get_dataout = isert_get_dataout, 3299b8d26b3bSNicholas Bellinger .iscsit_queue_data_in = isert_put_datain, 3300b8d26b3bSNicholas Bellinger .iscsit_queue_status = isert_put_response, 3301131e6abcSNicholas Bellinger .iscsit_aborted_task = isert_aborted_task, 3302e70beee7SNicholas Bellinger .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, 3303b8d26b3bSNicholas Bellinger }; 3304b8d26b3bSNicholas Bellinger 3305b8d26b3bSNicholas Bellinger static int __init isert_init(void) 3306b8d26b3bSNicholas Bellinger { 3307b8d26b3bSNicholas Bellinger int ret; 3308b8d26b3bSNicholas Bellinger 3309b8d26b3bSNicholas Bellinger isert_comp_wq = alloc_workqueue("isert_comp_wq", 0, 0); 3310b8d26b3bSNicholas Bellinger if (!isert_comp_wq) { 3311b8d26b3bSNicholas Bellinger pr_err("Unable to allocate isert_comp_wq\n"); 3312b8d26b3bSNicholas Bellinger ret = -ENOMEM; 33136f0fae3dSSagi Grimberg return -ENOMEM; 3314b8d26b3bSNicholas Bellinger } 3315b8d26b3bSNicholas Bellinger 3316b02efbfcSSagi Grimberg isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, 3317b02efbfcSSagi Grimberg WQ_UNBOUND_MAX_ACTIVE); 3318b02efbfcSSagi Grimberg if (!isert_release_wq) { 3319b02efbfcSSagi Grimberg pr_err("Unable to allocate isert_release_wq\n"); 3320b02efbfcSSagi Grimberg ret = -ENOMEM; 3321b02efbfcSSagi Grimberg goto destroy_comp_wq; 3322b02efbfcSSagi Grimberg } 3323b02efbfcSSagi Grimberg 3324b8d26b3bSNicholas Bellinger iscsit_register_transport(&iser_target_transport); 3325b02efbfcSSagi Grimberg pr_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); 3326b02efbfcSSagi Grimberg 3327b8d26b3bSNicholas Bellinger return 0; 3328b8d26b3bSNicholas Bellinger 3329b02efbfcSSagi Grimberg destroy_comp_wq: 3330b02efbfcSSagi Grimberg destroy_workqueue(isert_comp_wq); 33316f0fae3dSSagi Grimberg 3332b8d26b3bSNicholas Bellinger return ret; 3333b8d26b3bSNicholas Bellinger } 3334b8d26b3bSNicholas Bellinger 3335b8d26b3bSNicholas Bellinger static void __exit isert_exit(void) 3336b8d26b3bSNicholas Bellinger { 3337f5ebec96SSagi Grimberg flush_scheduled_work(); 3338b02efbfcSSagi Grimberg destroy_workqueue(isert_release_wq); 3339b8d26b3bSNicholas Bellinger destroy_workqueue(isert_comp_wq); 3340b8d26b3bSNicholas Bellinger iscsit_unregister_transport(&iser_target_transport); 3341b8d26b3bSNicholas Bellinger pr_debug("iSER_TARGET[0] - Released iser_target_transport\n"); 3342b8d26b3bSNicholas Bellinger } 3343b8d26b3bSNicholas Bellinger 3344b8d26b3bSNicholas Bellinger MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); 3345b8d26b3bSNicholas Bellinger MODULE_VERSION("0.1"); 3346b8d26b3bSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3347b8d26b3bSNicholas Bellinger MODULE_LICENSE("GPL"); 3348b8d26b3bSNicholas Bellinger 3349b8d26b3bSNicholas Bellinger module_init(isert_init); 3350b8d26b3bSNicholas Bellinger module_exit(isert_exit); 3351