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) 38bdf20e72SSagi Grimberg #define ISER_MAX_CQ_LEN (ISER_MAX_RX_CQ_LEN + ISER_MAX_TX_CQ_LEN + \ 39bdf20e72SSagi Grimberg ISERT_MAX_CONN) 40b8d26b3bSNicholas Bellinger 4145678b6bSSagi Grimberg static int isert_debug_level; 4224f412ddSSagi Grimberg module_param_named(debug_level, isert_debug_level, int, 0644); 4324f412ddSSagi Grimberg MODULE_PARM_DESC(debug_level, "Enable debug tracing if > 0 (default:0)"); 4424f412ddSSagi Grimberg 45b8d26b3bSNicholas Bellinger static DEFINE_MUTEX(device_list_mutex); 46b8d26b3bSNicholas Bellinger static LIST_HEAD(device_list); 47b8d26b3bSNicholas Bellinger static struct workqueue_struct *isert_comp_wq; 48b02efbfcSSagi Grimberg static struct workqueue_struct *isert_release_wq; 49b8d26b3bSNicholas Bellinger 50b8d26b3bSNicholas Bellinger static void 51d40945d8SVu Pham isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); 52d40945d8SVu Pham static int 53d40945d8SVu Pham isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 54d40945d8SVu Pham struct isert_rdma_wr *wr); 5559464ef4SVu Pham static void 56a3a5a826SSagi Grimberg isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); 5759464ef4SVu Pham static int 58a3a5a826SSagi Grimberg isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 5959464ef4SVu Pham struct isert_rdma_wr *wr); 60f93f3a70SSagi Grimberg static int 61f93f3a70SSagi Grimberg isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); 622371e5daSSagi Grimberg static int 632371e5daSSagi Grimberg isert_rdma_post_recvl(struct isert_conn *isert_conn); 642371e5daSSagi Grimberg static int 652371e5daSSagi Grimberg isert_rdma_accept(struct isert_conn *isert_conn); 66ca6c1d82SSagi Grimberg struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np); 67d40945d8SVu Pham 68302cc7c3SSagi Grimberg static inline bool 69302cc7c3SSagi Grimberg isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd) 70302cc7c3SSagi Grimberg { 7123a548eeSSagi Grimberg return (conn->pi_support && 72302cc7c3SSagi Grimberg cmd->prot_op != TARGET_PROT_NORMAL); 73302cc7c3SSagi Grimberg } 74302cc7c3SSagi Grimberg 75302cc7c3SSagi Grimberg 76d40945d8SVu Pham static void 77b8d26b3bSNicholas Bellinger isert_qp_event_callback(struct ib_event *e, void *context) 78b8d26b3bSNicholas Bellinger { 79b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)context; 80b8d26b3bSNicholas Bellinger 814c22e07fSSagi Grimberg isert_err("conn %p event: %d\n", isert_conn, e->event); 82b8d26b3bSNicholas Bellinger switch (e->event) { 83b8d26b3bSNicholas Bellinger case IB_EVENT_COMM_EST: 84b8d26b3bSNicholas Bellinger rdma_notify(isert_conn->conn_cm_id, IB_EVENT_COMM_EST); 85b8d26b3bSNicholas Bellinger break; 86b8d26b3bSNicholas Bellinger case IB_EVENT_QP_LAST_WQE_REACHED: 874c22e07fSSagi Grimberg isert_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED\n"); 88b8d26b3bSNicholas Bellinger break; 89b8d26b3bSNicholas Bellinger default: 90b8d26b3bSNicholas Bellinger break; 91b8d26b3bSNicholas Bellinger } 92b8d26b3bSNicholas Bellinger } 93b8d26b3bSNicholas Bellinger 94b8d26b3bSNicholas Bellinger static int 95b8d26b3bSNicholas Bellinger isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) 96b8d26b3bSNicholas Bellinger { 97b8d26b3bSNicholas Bellinger int ret; 98b8d26b3bSNicholas Bellinger 99b8d26b3bSNicholas Bellinger ret = ib_query_device(ib_dev, devattr); 100b8d26b3bSNicholas Bellinger if (ret) { 10124f412ddSSagi Grimberg isert_err("ib_query_device() failed: %d\n", ret); 102b8d26b3bSNicholas Bellinger return ret; 103b8d26b3bSNicholas Bellinger } 10424f412ddSSagi Grimberg isert_dbg("devattr->max_sge: %d\n", devattr->max_sge); 10524f412ddSSagi Grimberg isert_dbg("devattr->max_sge_rd: %d\n", devattr->max_sge_rd); 106b8d26b3bSNicholas Bellinger 107b8d26b3bSNicholas Bellinger return 0; 108b8d26b3bSNicholas Bellinger } 109b8d26b3bSNicholas Bellinger 110b8d26b3bSNicholas Bellinger static int 111570db170SSagi Grimberg isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id) 112b8d26b3bSNicholas Bellinger { 113b8d26b3bSNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 114b8d26b3bSNicholas Bellinger struct ib_qp_init_attr attr; 1154a295baeSSagi Grimberg struct isert_comp *comp; 1164a295baeSSagi Grimberg int ret, i, min = 0; 117b8d26b3bSNicholas Bellinger 118b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 1194a295baeSSagi Grimberg for (i = 0; i < device->comps_used; i++) 1204a295baeSSagi Grimberg if (device->comps[i].active_qps < 1214a295baeSSagi Grimberg device->comps[min].active_qps) 1224a295baeSSagi Grimberg min = i; 1234a295baeSSagi Grimberg comp = &device->comps[min]; 1244a295baeSSagi Grimberg comp->active_qps++; 12524f412ddSSagi Grimberg isert_info("conn %p, using comp %p min_index: %d\n", 1264a295baeSSagi Grimberg isert_conn, comp, min); 127b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 128b8d26b3bSNicholas Bellinger 129b8d26b3bSNicholas Bellinger memset(&attr, 0, sizeof(struct ib_qp_init_attr)); 130b8d26b3bSNicholas Bellinger attr.event_handler = isert_qp_event_callback; 131b8d26b3bSNicholas Bellinger attr.qp_context = isert_conn; 1326f0fae3dSSagi Grimberg attr.send_cq = comp->cq; 1336f0fae3dSSagi Grimberg attr.recv_cq = comp->cq; 134b8d26b3bSNicholas Bellinger attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; 135bdf20e72SSagi Grimberg attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1; 136b8d26b3bSNicholas Bellinger /* 137b8d26b3bSNicholas Bellinger * FIXME: Use devattr.max_sge - 2 for max_send_sge as 138f57915cfSOr Gerlitz * work-around for RDMA_READs with ConnectX-2. 139f57915cfSOr Gerlitz * 140f57915cfSOr Gerlitz * Also, still make sure to have at least two SGEs for 141f57915cfSOr Gerlitz * outgoing control PDU responses. 142b8d26b3bSNicholas Bellinger */ 143f57915cfSOr Gerlitz attr.cap.max_send_sge = max(2, device->dev_attr.max_sge - 2); 144b8d26b3bSNicholas Bellinger isert_conn->max_sge = attr.cap.max_send_sge; 145b8d26b3bSNicholas Bellinger 146b8d26b3bSNicholas Bellinger attr.cap.max_recv_sge = 1; 147b8d26b3bSNicholas Bellinger attr.sq_sig_type = IB_SIGNAL_REQ_WR; 148b8d26b3bSNicholas Bellinger attr.qp_type = IB_QPT_RC; 149570db170SSagi Grimberg if (device->pi_capable) 150d3e125daSSagi Grimberg attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; 151b8d26b3bSNicholas Bellinger 152b8d26b3bSNicholas Bellinger ret = rdma_create_qp(cma_id, isert_conn->conn_pd, &attr); 153b8d26b3bSNicholas Bellinger if (ret) { 15424f412ddSSagi Grimberg isert_err("rdma_create_qp failed for cma_id %d\n", ret); 15519e2090fSSagi Grimberg goto err; 156b8d26b3bSNicholas Bellinger } 157b8d26b3bSNicholas Bellinger isert_conn->conn_qp = cma_id->qp; 158b8d26b3bSNicholas Bellinger 159b8d26b3bSNicholas Bellinger return 0; 16019e2090fSSagi Grimberg err: 16119e2090fSSagi Grimberg mutex_lock(&device_list_mutex); 1624a295baeSSagi Grimberg comp->active_qps--; 16319e2090fSSagi Grimberg mutex_unlock(&device_list_mutex); 16419e2090fSSagi Grimberg 16519e2090fSSagi Grimberg return ret; 166b8d26b3bSNicholas Bellinger } 167b8d26b3bSNicholas Bellinger 168b8d26b3bSNicholas Bellinger static void 169b8d26b3bSNicholas Bellinger isert_cq_event_callback(struct ib_event *e, void *context) 170b8d26b3bSNicholas Bellinger { 1714c22e07fSSagi Grimberg isert_dbg("event: %d\n", e->event); 172b8d26b3bSNicholas Bellinger } 173b8d26b3bSNicholas Bellinger 174b8d26b3bSNicholas Bellinger static int 175b8d26b3bSNicholas Bellinger isert_alloc_rx_descriptors(struct isert_conn *isert_conn) 176b8d26b3bSNicholas Bellinger { 177b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 178b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 179b8d26b3bSNicholas Bellinger struct ib_sge *rx_sg; 180b8d26b3bSNicholas Bellinger u64 dma_addr; 181b8d26b3bSNicholas Bellinger int i, j; 182b8d26b3bSNicholas Bellinger 183b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * 184b8d26b3bSNicholas Bellinger sizeof(struct iser_rx_desc), GFP_KERNEL); 185b8d26b3bSNicholas Bellinger if (!isert_conn->conn_rx_descs) 186b8d26b3bSNicholas Bellinger goto fail; 187b8d26b3bSNicholas Bellinger 188b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 189b8d26b3bSNicholas Bellinger 190b8d26b3bSNicholas Bellinger for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { 191b8d26b3bSNicholas Bellinger dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, 192b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 193b8d26b3bSNicholas Bellinger if (ib_dma_mapping_error(ib_dev, dma_addr)) 194b8d26b3bSNicholas Bellinger goto dma_map_fail; 195b8d26b3bSNicholas Bellinger 196b8d26b3bSNicholas Bellinger rx_desc->dma_addr = dma_addr; 197b8d26b3bSNicholas Bellinger 198b8d26b3bSNicholas Bellinger rx_sg = &rx_desc->rx_sg; 199b8d26b3bSNicholas Bellinger rx_sg->addr = rx_desc->dma_addr; 200b8d26b3bSNicholas Bellinger rx_sg->length = ISER_RX_PAYLOAD_SIZE; 201b8d26b3bSNicholas Bellinger rx_sg->lkey = isert_conn->conn_mr->lkey; 202b8d26b3bSNicholas Bellinger } 203b8d26b3bSNicholas Bellinger 204b8d26b3bSNicholas Bellinger isert_conn->conn_rx_desc_head = 0; 2054c22e07fSSagi Grimberg 206b8d26b3bSNicholas Bellinger return 0; 207b8d26b3bSNicholas Bellinger 208b8d26b3bSNicholas Bellinger dma_map_fail: 209b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 210b8d26b3bSNicholas Bellinger for (j = 0; j < i; j++, rx_desc++) { 211b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, 212b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 213b8d26b3bSNicholas Bellinger } 214b8d26b3bSNicholas Bellinger kfree(isert_conn->conn_rx_descs); 215b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = NULL; 216b8d26b3bSNicholas Bellinger fail: 2174c22e07fSSagi Grimberg isert_err("conn %p failed to allocate rx descriptors\n", isert_conn); 2184c22e07fSSagi Grimberg 219b8d26b3bSNicholas Bellinger return -ENOMEM; 220b8d26b3bSNicholas Bellinger } 221b8d26b3bSNicholas Bellinger 222b8d26b3bSNicholas Bellinger static void 223b8d26b3bSNicholas Bellinger isert_free_rx_descriptors(struct isert_conn *isert_conn) 224b8d26b3bSNicholas Bellinger { 225b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 226b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 227b8d26b3bSNicholas Bellinger int i; 228b8d26b3bSNicholas Bellinger 229b8d26b3bSNicholas Bellinger if (!isert_conn->conn_rx_descs) 230b8d26b3bSNicholas Bellinger return; 231b8d26b3bSNicholas Bellinger 232b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 233b8d26b3bSNicholas Bellinger for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { 234b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, 235b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 236b8d26b3bSNicholas Bellinger } 237b8d26b3bSNicholas Bellinger 238b8d26b3bSNicholas Bellinger kfree(isert_conn->conn_rx_descs); 239b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = NULL; 240b8d26b3bSNicholas Bellinger } 241b8d26b3bSNicholas Bellinger 2426f0fae3dSSagi Grimberg static void isert_cq_work(struct work_struct *); 2436f0fae3dSSagi Grimberg static void isert_cq_callback(struct ib_cq *, void *); 244b8d26b3bSNicholas Bellinger 245b8d26b3bSNicholas Bellinger static int 246b8d26b3bSNicholas Bellinger isert_create_device_ib_res(struct isert_device *device) 247b8d26b3bSNicholas Bellinger { 248b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = device->ib_device; 24959464ef4SVu Pham struct ib_device_attr *dev_attr; 2504a295baeSSagi Grimberg int ret = 0, i; 2516f0fae3dSSagi Grimberg int max_cqe; 252b8d26b3bSNicholas Bellinger 25359464ef4SVu Pham dev_attr = &device->dev_attr; 25459464ef4SVu Pham ret = isert_query_device(ib_dev, dev_attr); 25559464ef4SVu Pham if (ret) 25659464ef4SVu Pham return ret; 25759464ef4SVu Pham 2586f0fae3dSSagi Grimberg max_cqe = min(ISER_MAX_CQ_LEN, dev_attr->max_cqe); 259b1a5ad00SChris Moore 260d40945d8SVu Pham /* asign function handlers */ 261f2252258SSagi Grimberg if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS && 262f2252258SSagi Grimberg dev_attr->device_cap_flags & IB_DEVICE_SIGNATURE_HANDOVER) { 263a3a5a826SSagi Grimberg device->use_fastreg = 1; 264a3a5a826SSagi Grimberg device->reg_rdma_mem = isert_reg_rdma; 265a3a5a826SSagi Grimberg device->unreg_rdma_mem = isert_unreg_rdma; 26659464ef4SVu Pham } else { 267a3a5a826SSagi Grimberg device->use_fastreg = 0; 268d40945d8SVu Pham device->reg_rdma_mem = isert_map_rdma; 269d40945d8SVu Pham device->unreg_rdma_mem = isert_unmap_cmd; 27059464ef4SVu Pham } 271d40945d8SVu Pham 272d3e125daSSagi Grimberg /* Check signature cap */ 273d3e125daSSagi Grimberg device->pi_capable = dev_attr->device_cap_flags & 274d3e125daSSagi Grimberg IB_DEVICE_SIGNATURE_HANDOVER ? true : false; 275d3e125daSSagi Grimberg 2764a295baeSSagi Grimberg device->comps_used = min(ISERT_MAX_CQ, min_t(int, num_online_cpus(), 2774a295baeSSagi Grimberg device->ib_device->num_comp_vectors)); 27824f412ddSSagi Grimberg isert_info("Using %d CQs, %s supports %d vectors support " 279d3e125daSSagi Grimberg "Fast registration %d pi_capable %d\n", 2804a295baeSSagi Grimberg device->comps_used, device->ib_device->name, 281d3e125daSSagi Grimberg device->ib_device->num_comp_vectors, device->use_fastreg, 282d3e125daSSagi Grimberg device->pi_capable); 2834a295baeSSagi Grimberg 2844a295baeSSagi Grimberg device->comps = kcalloc(device->comps_used, sizeof(struct isert_comp), 2854a295baeSSagi Grimberg GFP_KERNEL); 2864a295baeSSagi Grimberg if (!device->comps) { 28724f412ddSSagi Grimberg isert_err("Unable to allocate completion contexts\n"); 288b8d26b3bSNicholas Bellinger return -ENOMEM; 289b8d26b3bSNicholas Bellinger } 290b8d26b3bSNicholas Bellinger 2914a295baeSSagi Grimberg for (i = 0; i < device->comps_used; i++) { 2924a295baeSSagi Grimberg struct isert_comp *comp = &device->comps[i]; 293b8d26b3bSNicholas Bellinger 2944a295baeSSagi Grimberg comp->device = device; 2956f0fae3dSSagi Grimberg INIT_WORK(&comp->work, isert_cq_work); 2966f0fae3dSSagi Grimberg comp->cq = ib_create_cq(device->ib_device, 2976f0fae3dSSagi Grimberg isert_cq_callback, 298b8d26b3bSNicholas Bellinger isert_cq_event_callback, 2994a295baeSSagi Grimberg (void *)comp, 3006f0fae3dSSagi Grimberg max_cqe, i); 3016f0fae3dSSagi Grimberg if (IS_ERR(comp->cq)) { 3026f0fae3dSSagi Grimberg ret = PTR_ERR(comp->cq); 3036f0fae3dSSagi Grimberg comp->cq = NULL; 304b8d26b3bSNicholas Bellinger goto out_cq; 30594a71110SWei Yongjun } 306b8d26b3bSNicholas Bellinger 3076f0fae3dSSagi Grimberg ret = ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); 30894a71110SWei Yongjun if (ret) 309b8d26b3bSNicholas Bellinger goto out_cq; 310b8d26b3bSNicholas Bellinger } 311b8d26b3bSNicholas Bellinger 312b8d26b3bSNicholas Bellinger return 0; 313b8d26b3bSNicholas Bellinger 314b8d26b3bSNicholas Bellinger out_cq: 3154a295baeSSagi Grimberg for (i = 0; i < device->comps_used; i++) { 3164a295baeSSagi Grimberg struct isert_comp *comp = &device->comps[i]; 317b8d26b3bSNicholas Bellinger 3186f0fae3dSSagi Grimberg if (comp->cq) { 3196f0fae3dSSagi Grimberg cancel_work_sync(&comp->work); 3206f0fae3dSSagi Grimberg ib_destroy_cq(comp->cq); 321b8d26b3bSNicholas Bellinger } 322b8d26b3bSNicholas Bellinger } 3234a295baeSSagi Grimberg kfree(device->comps); 324b8d26b3bSNicholas Bellinger 325b8d26b3bSNicholas Bellinger return ret; 326b8d26b3bSNicholas Bellinger } 327b8d26b3bSNicholas Bellinger 328b8d26b3bSNicholas Bellinger static void 329b8d26b3bSNicholas Bellinger isert_free_device_ib_res(struct isert_device *device) 330b8d26b3bSNicholas Bellinger { 331b8d26b3bSNicholas Bellinger int i; 332b8d26b3bSNicholas Bellinger 33324f412ddSSagi Grimberg isert_info("device %p\n", device); 334b8d26b3bSNicholas Bellinger 3354a295baeSSagi Grimberg for (i = 0; i < device->comps_used; i++) { 3364a295baeSSagi Grimberg struct isert_comp *comp = &device->comps[i]; 3374a295baeSSagi Grimberg 3386f0fae3dSSagi Grimberg cancel_work_sync(&comp->work); 3396f0fae3dSSagi Grimberg ib_destroy_cq(comp->cq); 3406f0fae3dSSagi Grimberg comp->cq = NULL; 341b8d26b3bSNicholas Bellinger } 3424a295baeSSagi Grimberg kfree(device->comps); 343b8d26b3bSNicholas Bellinger } 344b8d26b3bSNicholas Bellinger 345b8d26b3bSNicholas Bellinger static void 346b8d26b3bSNicholas Bellinger isert_device_try_release(struct isert_device *device) 347b8d26b3bSNicholas Bellinger { 348b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 349b8d26b3bSNicholas Bellinger device->refcount--; 3504c22e07fSSagi Grimberg isert_info("device %p refcount %d\n", device, device->refcount); 351b8d26b3bSNicholas Bellinger if (!device->refcount) { 352b8d26b3bSNicholas Bellinger isert_free_device_ib_res(device); 353b8d26b3bSNicholas Bellinger list_del(&device->dev_node); 354b8d26b3bSNicholas Bellinger kfree(device); 355b8d26b3bSNicholas Bellinger } 356b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 357b8d26b3bSNicholas Bellinger } 358b8d26b3bSNicholas Bellinger 359b8d26b3bSNicholas Bellinger static struct isert_device * 360b8d26b3bSNicholas Bellinger isert_device_find_by_ib_dev(struct rdma_cm_id *cma_id) 361b8d26b3bSNicholas Bellinger { 362b8d26b3bSNicholas Bellinger struct isert_device *device; 363b8d26b3bSNicholas Bellinger int ret; 364b8d26b3bSNicholas Bellinger 365b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 366b8d26b3bSNicholas Bellinger list_for_each_entry(device, &device_list, dev_node) { 367b8d26b3bSNicholas Bellinger if (device->ib_device->node_guid == cma_id->device->node_guid) { 368b8d26b3bSNicholas Bellinger device->refcount++; 3694c22e07fSSagi Grimberg isert_info("Found iser device %p refcount %d\n", 3704c22e07fSSagi Grimberg device, device->refcount); 371b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 372b8d26b3bSNicholas Bellinger return device; 373b8d26b3bSNicholas Bellinger } 374b8d26b3bSNicholas Bellinger } 375b8d26b3bSNicholas Bellinger 376b8d26b3bSNicholas Bellinger device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); 377b8d26b3bSNicholas Bellinger if (!device) { 378b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 379b8d26b3bSNicholas Bellinger return ERR_PTR(-ENOMEM); 380b8d26b3bSNicholas Bellinger } 381b8d26b3bSNicholas Bellinger 382b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&device->dev_node); 383b8d26b3bSNicholas Bellinger 384b8d26b3bSNicholas Bellinger device->ib_device = cma_id->device; 385b8d26b3bSNicholas Bellinger ret = isert_create_device_ib_res(device); 386b8d26b3bSNicholas Bellinger if (ret) { 387b8d26b3bSNicholas Bellinger kfree(device); 388b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 389b8d26b3bSNicholas Bellinger return ERR_PTR(ret); 390b8d26b3bSNicholas Bellinger } 391b8d26b3bSNicholas Bellinger 392b8d26b3bSNicholas Bellinger device->refcount++; 393b8d26b3bSNicholas Bellinger list_add_tail(&device->dev_node, &device_list); 3944c22e07fSSagi Grimberg isert_info("Created a new iser device %p refcount %d\n", 3954c22e07fSSagi Grimberg device, device->refcount); 396b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 397b8d26b3bSNicholas Bellinger 398b8d26b3bSNicholas Bellinger return device; 399b8d26b3bSNicholas Bellinger } 400b8d26b3bSNicholas Bellinger 40159464ef4SVu Pham static void 402a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) 40359464ef4SVu Pham { 40459464ef4SVu Pham struct fast_reg_descriptor *fr_desc, *tmp; 40559464ef4SVu Pham int i = 0; 40659464ef4SVu Pham 407a3a5a826SSagi Grimberg if (list_empty(&isert_conn->conn_fr_pool)) 40859464ef4SVu Pham return; 40959464ef4SVu Pham 4104c22e07fSSagi Grimberg isert_info("Freeing conn %p fastreg pool", isert_conn); 41159464ef4SVu Pham 41259464ef4SVu Pham list_for_each_entry_safe(fr_desc, tmp, 413a3a5a826SSagi Grimberg &isert_conn->conn_fr_pool, list) { 41459464ef4SVu Pham list_del(&fr_desc->list); 41559464ef4SVu Pham ib_free_fast_reg_page_list(fr_desc->data_frpl); 41659464ef4SVu Pham ib_dereg_mr(fr_desc->data_mr); 417d3e125daSSagi Grimberg if (fr_desc->pi_ctx) { 418d3e125daSSagi Grimberg ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl); 419d3e125daSSagi Grimberg ib_dereg_mr(fr_desc->pi_ctx->prot_mr); 420d3e125daSSagi Grimberg ib_destroy_mr(fr_desc->pi_ctx->sig_mr); 421d3e125daSSagi Grimberg kfree(fr_desc->pi_ctx); 422d3e125daSSagi Grimberg } 42359464ef4SVu Pham kfree(fr_desc); 42459464ef4SVu Pham ++i; 42559464ef4SVu Pham } 42659464ef4SVu Pham 427a3a5a826SSagi Grimberg if (i < isert_conn->conn_fr_pool_size) 42824f412ddSSagi Grimberg isert_warn("Pool still has %d regions registered\n", 429a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size - i); 43059464ef4SVu Pham } 43159464ef4SVu Pham 43259464ef4SVu Pham static int 433570db170SSagi Grimberg isert_create_pi_ctx(struct fast_reg_descriptor *desc, 434570db170SSagi Grimberg struct ib_device *device, 435570db170SSagi Grimberg struct ib_pd *pd) 436570db170SSagi Grimberg { 437570db170SSagi Grimberg struct ib_mr_init_attr mr_init_attr; 438570db170SSagi Grimberg struct pi_context *pi_ctx; 439570db170SSagi Grimberg int ret; 440570db170SSagi Grimberg 441570db170SSagi Grimberg pi_ctx = kzalloc(sizeof(*desc->pi_ctx), GFP_KERNEL); 442570db170SSagi Grimberg if (!pi_ctx) { 44324f412ddSSagi Grimberg isert_err("Failed to allocate pi context\n"); 444570db170SSagi Grimberg return -ENOMEM; 445570db170SSagi Grimberg } 446570db170SSagi Grimberg 447570db170SSagi Grimberg pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(device, 448570db170SSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 449570db170SSagi Grimberg if (IS_ERR(pi_ctx->prot_frpl)) { 45024f412ddSSagi Grimberg isert_err("Failed to allocate prot frpl err=%ld\n", 451570db170SSagi Grimberg PTR_ERR(pi_ctx->prot_frpl)); 452570db170SSagi Grimberg ret = PTR_ERR(pi_ctx->prot_frpl); 453570db170SSagi Grimberg goto err_pi_ctx; 454570db170SSagi Grimberg } 455570db170SSagi Grimberg 456570db170SSagi Grimberg pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); 457570db170SSagi Grimberg if (IS_ERR(pi_ctx->prot_mr)) { 45824f412ddSSagi Grimberg isert_err("Failed to allocate prot frmr err=%ld\n", 459570db170SSagi Grimberg PTR_ERR(pi_ctx->prot_mr)); 460570db170SSagi Grimberg ret = PTR_ERR(pi_ctx->prot_mr); 461570db170SSagi Grimberg goto err_prot_frpl; 462570db170SSagi Grimberg } 463570db170SSagi Grimberg desc->ind |= ISERT_PROT_KEY_VALID; 464570db170SSagi Grimberg 465570db170SSagi Grimberg memset(&mr_init_attr, 0, sizeof(mr_init_attr)); 466570db170SSagi Grimberg mr_init_attr.max_reg_descriptors = 2; 467570db170SSagi Grimberg mr_init_attr.flags |= IB_MR_SIGNATURE_EN; 468570db170SSagi Grimberg pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr); 469570db170SSagi Grimberg if (IS_ERR(pi_ctx->sig_mr)) { 47024f412ddSSagi Grimberg isert_err("Failed to allocate signature enabled mr err=%ld\n", 471570db170SSagi Grimberg PTR_ERR(pi_ctx->sig_mr)); 472570db170SSagi Grimberg ret = PTR_ERR(pi_ctx->sig_mr); 473570db170SSagi Grimberg goto err_prot_mr; 474570db170SSagi Grimberg } 475570db170SSagi Grimberg 476570db170SSagi Grimberg desc->pi_ctx = pi_ctx; 477570db170SSagi Grimberg desc->ind |= ISERT_SIG_KEY_VALID; 478570db170SSagi Grimberg desc->ind &= ~ISERT_PROTECTED; 479570db170SSagi Grimberg 480570db170SSagi Grimberg return 0; 481570db170SSagi Grimberg 482570db170SSagi Grimberg err_prot_mr: 483570db170SSagi Grimberg ib_dereg_mr(desc->pi_ctx->prot_mr); 484570db170SSagi Grimberg err_prot_frpl: 485570db170SSagi Grimberg ib_free_fast_reg_page_list(desc->pi_ctx->prot_frpl); 486570db170SSagi Grimberg err_pi_ctx: 487570db170SSagi Grimberg kfree(desc->pi_ctx); 488570db170SSagi Grimberg 489570db170SSagi Grimberg return ret; 490570db170SSagi Grimberg } 491570db170SSagi Grimberg 492570db170SSagi Grimberg static int 493dc87a90fSSagi Grimberg isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, 494570db170SSagi Grimberg struct fast_reg_descriptor *fr_desc) 495dc87a90fSSagi Grimberg { 496d3e125daSSagi Grimberg int ret; 497d3e125daSSagi Grimberg 498dc87a90fSSagi Grimberg fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device, 499dc87a90fSSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 500dc87a90fSSagi Grimberg if (IS_ERR(fr_desc->data_frpl)) { 50124f412ddSSagi Grimberg isert_err("Failed to allocate data frpl err=%ld\n", 502dc87a90fSSagi Grimberg PTR_ERR(fr_desc->data_frpl)); 503dc87a90fSSagi Grimberg return PTR_ERR(fr_desc->data_frpl); 504dc87a90fSSagi Grimberg } 505dc87a90fSSagi Grimberg 506dc87a90fSSagi Grimberg fr_desc->data_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); 507dc87a90fSSagi Grimberg if (IS_ERR(fr_desc->data_mr)) { 50824f412ddSSagi Grimberg isert_err("Failed to allocate data frmr err=%ld\n", 509dc87a90fSSagi Grimberg PTR_ERR(fr_desc->data_mr)); 510d3e125daSSagi Grimberg ret = PTR_ERR(fr_desc->data_mr); 511d3e125daSSagi Grimberg goto err_data_frpl; 512dc87a90fSSagi Grimberg } 513d3e125daSSagi Grimberg fr_desc->ind |= ISERT_DATA_KEY_VALID; 514dc87a90fSSagi Grimberg 51524f412ddSSagi Grimberg isert_dbg("Created fr_desc %p\n", fr_desc); 516dc87a90fSSagi Grimberg 517dc87a90fSSagi Grimberg return 0; 518570db170SSagi Grimberg 519d3e125daSSagi Grimberg err_data_frpl: 520d3e125daSSagi Grimberg ib_free_fast_reg_page_list(fr_desc->data_frpl); 521d3e125daSSagi Grimberg 522d3e125daSSagi Grimberg return ret; 523dc87a90fSSagi Grimberg } 524dc87a90fSSagi Grimberg 525dc87a90fSSagi Grimberg static int 526570db170SSagi Grimberg isert_conn_create_fastreg_pool(struct isert_conn *isert_conn) 52759464ef4SVu Pham { 52859464ef4SVu Pham struct fast_reg_descriptor *fr_desc; 52959464ef4SVu Pham struct isert_device *device = isert_conn->conn_device; 530f46d6a8aSNicholas Bellinger struct se_session *se_sess = isert_conn->conn->sess->se_sess; 531f46d6a8aSNicholas Bellinger struct se_node_acl *se_nacl = se_sess->se_node_acl; 532f46d6a8aSNicholas Bellinger int i, ret, tag_num; 533f46d6a8aSNicholas Bellinger /* 534f46d6a8aSNicholas Bellinger * Setup the number of FRMRs based upon the number of tags 535f46d6a8aSNicholas Bellinger * available to session in iscsi_target_locate_portal(). 536f46d6a8aSNicholas Bellinger */ 537f46d6a8aSNicholas Bellinger tag_num = max_t(u32, ISCSIT_MIN_TAGS, se_nacl->queue_depth); 538f46d6a8aSNicholas Bellinger tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS; 53959464ef4SVu Pham 540a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size = 0; 541f46d6a8aSNicholas Bellinger for (i = 0; i < tag_num; i++) { 54259464ef4SVu Pham fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); 54359464ef4SVu Pham if (!fr_desc) { 54424f412ddSSagi Grimberg isert_err("Failed to allocate fast_reg descriptor\n"); 54559464ef4SVu Pham ret = -ENOMEM; 54659464ef4SVu Pham goto err; 54759464ef4SVu Pham } 54859464ef4SVu Pham 549dc87a90fSSagi Grimberg ret = isert_create_fr_desc(device->ib_device, 550570db170SSagi Grimberg isert_conn->conn_pd, fr_desc); 551dc87a90fSSagi Grimberg if (ret) { 55224f412ddSSagi Grimberg isert_err("Failed to create fastreg descriptor err=%d\n", 553dc87a90fSSagi Grimberg ret); 554a80e21b3SNicholas Bellinger kfree(fr_desc); 55559464ef4SVu Pham goto err; 55659464ef4SVu Pham } 55759464ef4SVu Pham 558a3a5a826SSagi Grimberg list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); 559a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size++; 56059464ef4SVu Pham } 56159464ef4SVu Pham 56224f412ddSSagi Grimberg isert_dbg("Creating conn %p fastreg pool size=%d", 563a3a5a826SSagi Grimberg isert_conn, isert_conn->conn_fr_pool_size); 56459464ef4SVu Pham 56559464ef4SVu Pham return 0; 56659464ef4SVu Pham 56759464ef4SVu Pham err: 568a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(isert_conn); 56959464ef4SVu Pham return ret; 57059464ef4SVu Pham } 57159464ef4SVu Pham 572b8d26b3bSNicholas Bellinger static int 573b8d26b3bSNicholas Bellinger isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) 574b8d26b3bSNicholas Bellinger { 575ca6c1d82SSagi Grimberg struct isert_np *isert_np = cma_id->context; 576ca6c1d82SSagi Grimberg struct iscsi_np *np = isert_np->np; 577b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 578b8d26b3bSNicholas Bellinger struct isert_device *device; 579b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = cma_id->device; 580b8d26b3bSNicholas Bellinger int ret = 0; 58114f4b54fSSagi Grimberg 58214f4b54fSSagi Grimberg spin_lock_bh(&np->np_thread_lock); 58314f4b54fSSagi Grimberg if (!np->enabled) { 58414f4b54fSSagi Grimberg spin_unlock_bh(&np->np_thread_lock); 58524f412ddSSagi Grimberg isert_dbg("iscsi_np is not enabled, reject connect request\n"); 58614f4b54fSSagi Grimberg return rdma_reject(cma_id, NULL, 0); 58714f4b54fSSagi Grimberg } 58814f4b54fSSagi Grimberg spin_unlock_bh(&np->np_thread_lock); 589b8d26b3bSNicholas Bellinger 5904c22e07fSSagi Grimberg isert_dbg("cma_id: %p, portal: %p\n", 591b8d26b3bSNicholas Bellinger cma_id, cma_id->context); 592b8d26b3bSNicholas Bellinger 593b8d26b3bSNicholas Bellinger isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); 594b8d26b3bSNicholas Bellinger if (!isert_conn) { 59524f412ddSSagi Grimberg isert_err("Unable to allocate isert_conn\n"); 596b8d26b3bSNicholas Bellinger return -ENOMEM; 597b8d26b3bSNicholas Bellinger } 598b8d26b3bSNicholas Bellinger isert_conn->state = ISER_CONN_INIT; 599b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&isert_conn->conn_accept_node); 600b8d26b3bSNicholas Bellinger init_completion(&isert_conn->conn_login_comp); 6012371e5daSSagi Grimberg init_completion(&isert_conn->login_req_comp); 602defd8848SNicholas Bellinger init_completion(&isert_conn->conn_wait); 603b8d26b3bSNicholas Bellinger kref_init(&isert_conn->conn_kref); 604b2cb9649SNicholas Bellinger mutex_init(&isert_conn->conn_mutex); 60559464ef4SVu Pham spin_lock_init(&isert_conn->conn_lock); 606f46d6a8aSNicholas Bellinger INIT_LIST_HEAD(&isert_conn->conn_fr_pool); 607b8d26b3bSNicholas Bellinger 608b8d26b3bSNicholas Bellinger isert_conn->conn_cm_id = cma_id; 609b8d26b3bSNicholas Bellinger 610b8d26b3bSNicholas Bellinger isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + 611b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, GFP_KERNEL); 612b8d26b3bSNicholas Bellinger if (!isert_conn->login_buf) { 61324f412ddSSagi Grimberg isert_err("Unable to allocate isert_conn->login_buf\n"); 614b8d26b3bSNicholas Bellinger ret = -ENOMEM; 615b8d26b3bSNicholas Bellinger goto out; 616b8d26b3bSNicholas Bellinger } 617b8d26b3bSNicholas Bellinger 618b8d26b3bSNicholas Bellinger isert_conn->login_req_buf = isert_conn->login_buf; 619b8d26b3bSNicholas Bellinger isert_conn->login_rsp_buf = isert_conn->login_buf + 620b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN; 62124f412ddSSagi Grimberg isert_dbg("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", 622b8d26b3bSNicholas Bellinger isert_conn->login_buf, isert_conn->login_req_buf, 623b8d26b3bSNicholas Bellinger isert_conn->login_rsp_buf); 624b8d26b3bSNicholas Bellinger 625b8d26b3bSNicholas Bellinger isert_conn->login_req_dma = ib_dma_map_single(ib_dev, 626b8d26b3bSNicholas Bellinger (void *)isert_conn->login_req_buf, 627b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); 628b8d26b3bSNicholas Bellinger 629b8d26b3bSNicholas Bellinger ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); 630b8d26b3bSNicholas Bellinger if (ret) { 63124f412ddSSagi Grimberg isert_err("ib_dma_mapping_error failed for login_req_dma: %d\n", 632b8d26b3bSNicholas Bellinger ret); 633b8d26b3bSNicholas Bellinger isert_conn->login_req_dma = 0; 634b8d26b3bSNicholas Bellinger goto out_login_buf; 635b8d26b3bSNicholas Bellinger } 636b8d26b3bSNicholas Bellinger 637b8d26b3bSNicholas Bellinger isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, 638b8d26b3bSNicholas Bellinger (void *)isert_conn->login_rsp_buf, 639b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 640b8d26b3bSNicholas Bellinger 641b8d26b3bSNicholas Bellinger ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); 642b8d26b3bSNicholas Bellinger if (ret) { 64324f412ddSSagi Grimberg isert_err("ib_dma_mapping_error failed for login_rsp_dma: %d\n", 644b8d26b3bSNicholas Bellinger ret); 645b8d26b3bSNicholas Bellinger isert_conn->login_rsp_dma = 0; 646b8d26b3bSNicholas Bellinger goto out_req_dma_map; 647b8d26b3bSNicholas Bellinger } 648b8d26b3bSNicholas Bellinger 649b8d26b3bSNicholas Bellinger device = isert_device_find_by_ib_dev(cma_id); 650b8d26b3bSNicholas Bellinger if (IS_ERR(device)) { 651b8d26b3bSNicholas Bellinger ret = PTR_ERR(device); 652b8d26b3bSNicholas Bellinger goto out_rsp_dma_map; 653b8d26b3bSNicholas Bellinger } 654b8d26b3bSNicholas Bellinger 6551a92e17eSSagi Grimberg /* Set max inflight RDMA READ requests */ 6561a92e17eSSagi Grimberg isert_conn->initiator_depth = min_t(u8, 6571a92e17eSSagi Grimberg event->param.conn.initiator_depth, 6581a92e17eSSagi Grimberg device->dev_attr.max_qp_init_rd_atom); 65924f412ddSSagi Grimberg isert_dbg("Using initiator_depth: %u\n", isert_conn->initiator_depth); 6601a92e17eSSagi Grimberg 661b8d26b3bSNicholas Bellinger isert_conn->conn_device = device; 662eb6ab132SSagi Grimberg isert_conn->conn_pd = ib_alloc_pd(isert_conn->conn_device->ib_device); 663eb6ab132SSagi Grimberg if (IS_ERR(isert_conn->conn_pd)) { 664eb6ab132SSagi Grimberg ret = PTR_ERR(isert_conn->conn_pd); 66524f412ddSSagi Grimberg isert_err("ib_alloc_pd failed for conn %p: ret=%d\n", 666eb6ab132SSagi Grimberg isert_conn, ret); 667eb6ab132SSagi Grimberg goto out_pd; 668eb6ab132SSagi Grimberg } 669b8d26b3bSNicholas Bellinger 670eb6ab132SSagi Grimberg isert_conn->conn_mr = ib_get_dma_mr(isert_conn->conn_pd, 671eb6ab132SSagi Grimberg IB_ACCESS_LOCAL_WRITE); 672eb6ab132SSagi Grimberg if (IS_ERR(isert_conn->conn_mr)) { 673eb6ab132SSagi Grimberg ret = PTR_ERR(isert_conn->conn_mr); 67424f412ddSSagi Grimberg isert_err("ib_get_dma_mr failed for conn %p: ret=%d\n", 675eb6ab132SSagi Grimberg isert_conn, ret); 676eb6ab132SSagi Grimberg goto out_mr; 677eb6ab132SSagi Grimberg } 678b8d26b3bSNicholas Bellinger 679570db170SSagi Grimberg ret = isert_conn_setup_qp(isert_conn, cma_id); 680b8d26b3bSNicholas Bellinger if (ret) 681b8d26b3bSNicholas Bellinger goto out_conn_dev; 682b8d26b3bSNicholas Bellinger 6832371e5daSSagi Grimberg ret = isert_rdma_post_recvl(isert_conn); 6842371e5daSSagi Grimberg if (ret) 6852371e5daSSagi Grimberg goto out_conn_dev; 6862371e5daSSagi Grimberg 6872371e5daSSagi Grimberg ret = isert_rdma_accept(isert_conn); 6882371e5daSSagi Grimberg if (ret) 6892371e5daSSagi Grimberg goto out_conn_dev; 6902371e5daSSagi Grimberg 691b8d26b3bSNicholas Bellinger mutex_lock(&isert_np->np_accept_mutex); 6929fe63c88SSagi Grimberg list_add_tail(&isert_conn->conn_accept_node, &isert_np->np_accept_list); 693b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 694b8d26b3bSNicholas Bellinger 69524f412ddSSagi Grimberg isert_info("np %p: Allow accept_np to continue\n", np); 696531b7bf4SSagi Grimberg up(&isert_np->np_sem); 697b8d26b3bSNicholas Bellinger return 0; 698b8d26b3bSNicholas Bellinger 699b8d26b3bSNicholas Bellinger out_conn_dev: 700eb6ab132SSagi Grimberg ib_dereg_mr(isert_conn->conn_mr); 701eb6ab132SSagi Grimberg out_mr: 702eb6ab132SSagi Grimberg ib_dealloc_pd(isert_conn->conn_pd); 703eb6ab132SSagi Grimberg out_pd: 704b8d26b3bSNicholas Bellinger isert_device_try_release(device); 705b8d26b3bSNicholas Bellinger out_rsp_dma_map: 706b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, 707b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 708b8d26b3bSNicholas Bellinger out_req_dma_map: 709b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, 710b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); 711b8d26b3bSNicholas Bellinger out_login_buf: 712b8d26b3bSNicholas Bellinger kfree(isert_conn->login_buf); 713b8d26b3bSNicholas Bellinger out: 714b8d26b3bSNicholas Bellinger kfree(isert_conn); 7152371e5daSSagi Grimberg rdma_reject(cma_id, NULL, 0); 716b8d26b3bSNicholas Bellinger return ret; 717b8d26b3bSNicholas Bellinger } 718b8d26b3bSNicholas Bellinger 719b8d26b3bSNicholas Bellinger static void 720b8d26b3bSNicholas Bellinger isert_connect_release(struct isert_conn *isert_conn) 721b8d26b3bSNicholas Bellinger { 722b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 723b8d26b3bSNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 724b8d26b3bSNicholas Bellinger 7254c22e07fSSagi Grimberg isert_dbg("conn %p\n", isert_conn); 726b8d26b3bSNicholas Bellinger 727a3a5a826SSagi Grimberg if (device && device->use_fastreg) 728a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(isert_conn); 72959464ef4SVu Pham 73019e2090fSSagi Grimberg isert_free_rx_descriptors(isert_conn); 73119e2090fSSagi Grimberg rdma_destroy_id(isert_conn->conn_cm_id); 73219e2090fSSagi Grimberg 733b8d26b3bSNicholas Bellinger if (isert_conn->conn_qp) { 7344a295baeSSagi Grimberg struct isert_comp *comp = isert_conn->conn_qp->recv_cq->cq_context; 7354a295baeSSagi Grimberg 73624f412ddSSagi Grimberg isert_dbg("dec completion context %p active_qps\n", comp); 73719e2090fSSagi Grimberg mutex_lock(&device_list_mutex); 7384a295baeSSagi Grimberg comp->active_qps--; 73919e2090fSSagi Grimberg mutex_unlock(&device_list_mutex); 740b8d26b3bSNicholas Bellinger 74119e2090fSSagi Grimberg ib_destroy_qp(isert_conn->conn_qp); 742b8d26b3bSNicholas Bellinger } 743b8d26b3bSNicholas Bellinger 744eb6ab132SSagi Grimberg ib_dereg_mr(isert_conn->conn_mr); 745eb6ab132SSagi Grimberg ib_dealloc_pd(isert_conn->conn_pd); 746eb6ab132SSagi Grimberg 747b8d26b3bSNicholas Bellinger if (isert_conn->login_buf) { 748b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, 749b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 750b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, 751b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, 752b8d26b3bSNicholas Bellinger DMA_FROM_DEVICE); 753b8d26b3bSNicholas Bellinger kfree(isert_conn->login_buf); 754b8d26b3bSNicholas Bellinger } 755b8d26b3bSNicholas Bellinger kfree(isert_conn); 756b8d26b3bSNicholas Bellinger 757b8d26b3bSNicholas Bellinger if (device) 758b8d26b3bSNicholas Bellinger isert_device_try_release(device); 759b8d26b3bSNicholas Bellinger } 760b8d26b3bSNicholas Bellinger 761b8d26b3bSNicholas Bellinger static void 762b8d26b3bSNicholas Bellinger isert_connected_handler(struct rdma_cm_id *cma_id) 763b8d26b3bSNicholas Bellinger { 76419e2090fSSagi Grimberg struct isert_conn *isert_conn = cma_id->qp->qp_context; 765c2f88b17SSagi Grimberg 76624f412ddSSagi Grimberg isert_info("conn %p\n", isert_conn); 767128e9cc8SSagi Grimberg 7682371e5daSSagi Grimberg if (!kref_get_unless_zero(&isert_conn->conn_kref)) { 76924f412ddSSagi Grimberg isert_warn("conn %p connect_release is running\n", isert_conn); 7702371e5daSSagi Grimberg return; 7712371e5daSSagi Grimberg } 7722371e5daSSagi Grimberg 7732371e5daSSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 7742371e5daSSagi Grimberg if (isert_conn->state != ISER_CONN_FULL_FEATURE) 775128e9cc8SSagi Grimberg isert_conn->state = ISER_CONN_UP; 7762371e5daSSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 777b8d26b3bSNicholas Bellinger } 778b8d26b3bSNicholas Bellinger 779b8d26b3bSNicholas Bellinger static void 780b8d26b3bSNicholas Bellinger isert_release_conn_kref(struct kref *kref) 781b8d26b3bSNicholas Bellinger { 782b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = container_of(kref, 783b8d26b3bSNicholas Bellinger struct isert_conn, conn_kref); 784b8d26b3bSNicholas Bellinger 7854c22e07fSSagi Grimberg isert_info("conn %p final kref %s/%d\n", isert_conn, current->comm, 7864c22e07fSSagi Grimberg current->pid); 787b8d26b3bSNicholas Bellinger 788b8d26b3bSNicholas Bellinger isert_connect_release(isert_conn); 789b8d26b3bSNicholas Bellinger } 790b8d26b3bSNicholas Bellinger 791b8d26b3bSNicholas Bellinger static void 792b8d26b3bSNicholas Bellinger isert_put_conn(struct isert_conn *isert_conn) 793b8d26b3bSNicholas Bellinger { 794b8d26b3bSNicholas Bellinger kref_put(&isert_conn->conn_kref, isert_release_conn_kref); 795b8d26b3bSNicholas Bellinger } 796b8d26b3bSNicholas Bellinger 797954f2372SSagi Grimberg /** 798954f2372SSagi Grimberg * isert_conn_terminate() - Initiate connection termination 799954f2372SSagi Grimberg * @isert_conn: isert connection struct 800954f2372SSagi Grimberg * 801954f2372SSagi Grimberg * Notes: 802128e9cc8SSagi Grimberg * In case the connection state is FULL_FEATURE, move state 803954f2372SSagi Grimberg * to TEMINATING and start teardown sequence (rdma_disconnect). 804128e9cc8SSagi Grimberg * In case the connection state is UP, complete flush as well. 805954f2372SSagi Grimberg * 806954f2372SSagi Grimberg * This routine must be called with conn_mutex held. Thus it is 807954f2372SSagi Grimberg * safe to call multiple times. 808954f2372SSagi Grimberg */ 809954f2372SSagi Grimberg static void 810954f2372SSagi Grimberg isert_conn_terminate(struct isert_conn *isert_conn) 811954f2372SSagi Grimberg { 812954f2372SSagi Grimberg int err; 813954f2372SSagi Grimberg 814128e9cc8SSagi Grimberg switch (isert_conn->state) { 815128e9cc8SSagi Grimberg case ISER_CONN_TERMINATING: 816128e9cc8SSagi Grimberg break; 817128e9cc8SSagi Grimberg case ISER_CONN_UP: 818128e9cc8SSagi Grimberg case ISER_CONN_FULL_FEATURE: /* FALLTHRU */ 81924f412ddSSagi Grimberg isert_info("Terminating conn %p state %d\n", 820954f2372SSagi Grimberg isert_conn, isert_conn->state); 821128e9cc8SSagi Grimberg isert_conn->state = ISER_CONN_TERMINATING; 822954f2372SSagi Grimberg err = rdma_disconnect(isert_conn->conn_cm_id); 823954f2372SSagi Grimberg if (err) 82424f412ddSSagi Grimberg isert_warn("Failed rdma_disconnect isert_conn %p\n", 825954f2372SSagi Grimberg isert_conn); 826128e9cc8SSagi Grimberg break; 827128e9cc8SSagi Grimberg default: 82824f412ddSSagi Grimberg isert_warn("conn %p teminating in state %d\n", 829128e9cc8SSagi Grimberg isert_conn, isert_conn->state); 830954f2372SSagi Grimberg } 831954f2372SSagi Grimberg } 832954f2372SSagi Grimberg 8333b726ae2SSagi Grimberg static int 834ca6c1d82SSagi Grimberg isert_np_cma_handler(struct isert_np *isert_np, 835ca6c1d82SSagi Grimberg enum rdma_cm_event_type event) 836b8d26b3bSNicholas Bellinger { 83724f412ddSSagi Grimberg isert_dbg("isert np %p, handling event %d\n", isert_np, event); 8383b726ae2SSagi Grimberg 839ca6c1d82SSagi Grimberg switch (event) { 840ca6c1d82SSagi Grimberg case RDMA_CM_EVENT_DEVICE_REMOVAL: 8413b726ae2SSagi Grimberg isert_np->np_cm_id = NULL; 842ca6c1d82SSagi Grimberg break; 843ca6c1d82SSagi Grimberg case RDMA_CM_EVENT_ADDR_CHANGE: 844ca6c1d82SSagi Grimberg isert_np->np_cm_id = isert_setup_id(isert_np); 845ca6c1d82SSagi Grimberg if (IS_ERR(isert_np->np_cm_id)) { 84624f412ddSSagi Grimberg isert_err("isert np %p setup id failed: %ld\n", 847ca6c1d82SSagi Grimberg isert_np, PTR_ERR(isert_np->np_cm_id)); 848ca6c1d82SSagi Grimberg isert_np->np_cm_id = NULL; 849ca6c1d82SSagi Grimberg } 850ca6c1d82SSagi Grimberg break; 851ca6c1d82SSagi Grimberg default: 85224f412ddSSagi Grimberg isert_err("isert np %p Unexpected event %d\n", 853ca6c1d82SSagi Grimberg isert_np, event); 854ca6c1d82SSagi Grimberg } 855ca6c1d82SSagi Grimberg 8563b726ae2SSagi Grimberg return -1; 8573b726ae2SSagi Grimberg } 8583b726ae2SSagi Grimberg 859ca6c1d82SSagi Grimberg static int 860ca6c1d82SSagi Grimberg isert_disconnected_handler(struct rdma_cm_id *cma_id, 861ca6c1d82SSagi Grimberg enum rdma_cm_event_type event) 862ca6c1d82SSagi Grimberg { 863ca6c1d82SSagi Grimberg struct isert_np *isert_np = cma_id->context; 864ca6c1d82SSagi Grimberg struct isert_conn *isert_conn; 865ca6c1d82SSagi Grimberg 866ca6c1d82SSagi Grimberg if (isert_np->np_cm_id == cma_id) 867ca6c1d82SSagi Grimberg return isert_np_cma_handler(cma_id->context, event); 868ca6c1d82SSagi Grimberg 86919e2090fSSagi Grimberg isert_conn = cma_id->qp->qp_context; 870b8d26b3bSNicholas Bellinger 871128e9cc8SSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 872128e9cc8SSagi Grimberg isert_conn_terminate(isert_conn); 873128e9cc8SSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 874128e9cc8SSagi Grimberg 87524f412ddSSagi Grimberg isert_info("conn %p completing conn_wait\n", isert_conn); 876128e9cc8SSagi Grimberg complete(&isert_conn->conn_wait); 8773b726ae2SSagi Grimberg 8783b726ae2SSagi Grimberg return 0; 879b8d26b3bSNicholas Bellinger } 880b8d26b3bSNicholas Bellinger 881954f2372SSagi Grimberg static void 882954f2372SSagi Grimberg isert_connect_error(struct rdma_cm_id *cma_id) 883954f2372SSagi Grimberg { 88419e2090fSSagi Grimberg struct isert_conn *isert_conn = cma_id->qp->qp_context; 885954f2372SSagi Grimberg 886954f2372SSagi Grimberg isert_put_conn(isert_conn); 887954f2372SSagi Grimberg } 888954f2372SSagi Grimberg 889b8d26b3bSNicholas Bellinger static int 890b8d26b3bSNicholas Bellinger isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) 891b8d26b3bSNicholas Bellinger { 892b8d26b3bSNicholas Bellinger int ret = 0; 893b8d26b3bSNicholas Bellinger 8944c22e07fSSagi Grimberg isert_info("event %d status %d id %p np %p\n", event->event, 8954c22e07fSSagi Grimberg event->status, cma_id, cma_id->context); 896b8d26b3bSNicholas Bellinger 897b8d26b3bSNicholas Bellinger switch (event->event) { 898b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_CONNECT_REQUEST: 899b8d26b3bSNicholas Bellinger ret = isert_connect_request(cma_id, event); 9003b726ae2SSagi Grimberg if (ret) 9014c22e07fSSagi Grimberg isert_err("failed handle connect request %d\n", ret); 902b8d26b3bSNicholas Bellinger break; 903b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_ESTABLISHED: 904b8d26b3bSNicholas Bellinger isert_connected_handler(cma_id); 905b8d26b3bSNicholas Bellinger break; 90688c4015fSSagi Grimberg case RDMA_CM_EVENT_ADDR_CHANGE: /* FALLTHRU */ 90788c4015fSSagi Grimberg case RDMA_CM_EVENT_DISCONNECTED: /* FALLTHRU */ 90888c4015fSSagi Grimberg case RDMA_CM_EVENT_DEVICE_REMOVAL: /* FALLTHRU */ 90988c4015fSSagi Grimberg case RDMA_CM_EVENT_TIMEWAIT_EXIT: /* FALLTHRU */ 910ca6c1d82SSagi Grimberg ret = isert_disconnected_handler(cma_id, event->event); 911b8d26b3bSNicholas Bellinger break; 912954f2372SSagi Grimberg case RDMA_CM_EVENT_REJECTED: /* FALLTHRU */ 913954f2372SSagi Grimberg case RDMA_CM_EVENT_UNREACHABLE: /* FALLTHRU */ 914b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_CONNECT_ERROR: 915954f2372SSagi Grimberg isert_connect_error(cma_id); 916954f2372SSagi Grimberg break; 917b8d26b3bSNicholas Bellinger default: 91824f412ddSSagi Grimberg isert_err("Unhandled RDMA CMA event: %d\n", event->event); 919b8d26b3bSNicholas Bellinger break; 920b8d26b3bSNicholas Bellinger } 921b8d26b3bSNicholas Bellinger 922b8d26b3bSNicholas Bellinger return ret; 923b8d26b3bSNicholas Bellinger } 924b8d26b3bSNicholas Bellinger 925b8d26b3bSNicholas Bellinger static int 926b8d26b3bSNicholas Bellinger isert_post_recv(struct isert_conn *isert_conn, u32 count) 927b8d26b3bSNicholas Bellinger { 928b8d26b3bSNicholas Bellinger struct ib_recv_wr *rx_wr, *rx_wr_failed; 929b8d26b3bSNicholas Bellinger int i, ret; 930b8d26b3bSNicholas Bellinger unsigned int rx_head = isert_conn->conn_rx_desc_head; 931b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 932b8d26b3bSNicholas Bellinger 933b8d26b3bSNicholas Bellinger for (rx_wr = isert_conn->conn_rx_wr, i = 0; i < count; i++, rx_wr++) { 934b8d26b3bSNicholas Bellinger rx_desc = &isert_conn->conn_rx_descs[rx_head]; 935b0a191e7SSagi Grimberg rx_wr->wr_id = (uintptr_t)rx_desc; 936b8d26b3bSNicholas Bellinger rx_wr->sg_list = &rx_desc->rx_sg; 937b8d26b3bSNicholas Bellinger rx_wr->num_sge = 1; 938b8d26b3bSNicholas Bellinger rx_wr->next = rx_wr + 1; 939b8d26b3bSNicholas Bellinger rx_head = (rx_head + 1) & (ISERT_QP_MAX_RECV_DTOS - 1); 940b8d26b3bSNicholas Bellinger } 941b8d26b3bSNicholas Bellinger 942b8d26b3bSNicholas Bellinger rx_wr--; 943b8d26b3bSNicholas Bellinger rx_wr->next = NULL; /* mark end of work requests list */ 944b8d26b3bSNicholas Bellinger 945b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count += count; 946b8d26b3bSNicholas Bellinger ret = ib_post_recv(isert_conn->conn_qp, isert_conn->conn_rx_wr, 947b8d26b3bSNicholas Bellinger &rx_wr_failed); 948b8d26b3bSNicholas Bellinger if (ret) { 94924f412ddSSagi Grimberg isert_err("ib_post_recv() failed with ret: %d\n", ret); 950b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count -= count; 951b8d26b3bSNicholas Bellinger } else { 952*11378cdbSRasmus Villemoes isert_dbg("Posted %d RX buffers\n", count); 953b8d26b3bSNicholas Bellinger isert_conn->conn_rx_desc_head = rx_head; 954b8d26b3bSNicholas Bellinger } 955b8d26b3bSNicholas Bellinger return ret; 956b8d26b3bSNicholas Bellinger } 957b8d26b3bSNicholas Bellinger 958b8d26b3bSNicholas Bellinger static int 959b8d26b3bSNicholas Bellinger isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) 960b8d26b3bSNicholas Bellinger { 961b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 962b8d26b3bSNicholas Bellinger struct ib_send_wr send_wr, *send_wr_failed; 963b8d26b3bSNicholas Bellinger int ret; 964b8d26b3bSNicholas Bellinger 965b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, 966b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 967b8d26b3bSNicholas Bellinger 968b8d26b3bSNicholas Bellinger send_wr.next = NULL; 969b0a191e7SSagi Grimberg send_wr.wr_id = (uintptr_t)tx_desc; 970b8d26b3bSNicholas Bellinger send_wr.sg_list = tx_desc->tx_sg; 971b8d26b3bSNicholas Bellinger send_wr.num_sge = tx_desc->num_sge; 972b8d26b3bSNicholas Bellinger send_wr.opcode = IB_WR_SEND; 973b8d26b3bSNicholas Bellinger send_wr.send_flags = IB_SEND_SIGNALED; 974b8d26b3bSNicholas Bellinger 975b8d26b3bSNicholas Bellinger ret = ib_post_send(isert_conn->conn_qp, &send_wr, &send_wr_failed); 976bdf20e72SSagi Grimberg if (ret) 97724f412ddSSagi Grimberg isert_err("ib_post_send() failed, ret: %d\n", ret); 978b8d26b3bSNicholas Bellinger 979b8d26b3bSNicholas Bellinger return ret; 980b8d26b3bSNicholas Bellinger } 981b8d26b3bSNicholas Bellinger 982b8d26b3bSNicholas Bellinger static void 983b8d26b3bSNicholas Bellinger isert_create_send_desc(struct isert_conn *isert_conn, 984b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd, 985b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc) 986b8d26b3bSNicholas Bellinger { 987b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 988b8d26b3bSNicholas Bellinger 989b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, 990b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 991b8d26b3bSNicholas Bellinger 992b8d26b3bSNicholas Bellinger memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); 993b8d26b3bSNicholas Bellinger tx_desc->iser_header.flags = ISER_VER; 994b8d26b3bSNicholas Bellinger 995b8d26b3bSNicholas Bellinger tx_desc->num_sge = 1; 996b8d26b3bSNicholas Bellinger tx_desc->isert_cmd = isert_cmd; 997b8d26b3bSNicholas Bellinger 998b8d26b3bSNicholas Bellinger if (tx_desc->tx_sg[0].lkey != isert_conn->conn_mr->lkey) { 999b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey; 100024f412ddSSagi Grimberg isert_dbg("tx_desc %p lkey mismatch, fixing\n", tx_desc); 1001b8d26b3bSNicholas Bellinger } 1002b8d26b3bSNicholas Bellinger } 1003b8d26b3bSNicholas Bellinger 1004b8d26b3bSNicholas Bellinger static int 1005b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(struct isert_conn *isert_conn, 1006b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc) 1007b8d26b3bSNicholas Bellinger { 1008b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1009b8d26b3bSNicholas Bellinger u64 dma_addr; 1010b8d26b3bSNicholas Bellinger 1011b8d26b3bSNicholas Bellinger dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, 1012b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 1013b8d26b3bSNicholas Bellinger if (ib_dma_mapping_error(ib_dev, dma_addr)) { 101424f412ddSSagi Grimberg isert_err("ib_dma_mapping_error() failed\n"); 1015b8d26b3bSNicholas Bellinger return -ENOMEM; 1016b8d26b3bSNicholas Bellinger } 1017b8d26b3bSNicholas Bellinger 1018b8d26b3bSNicholas Bellinger tx_desc->dma_addr = dma_addr; 1019b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].addr = tx_desc->dma_addr; 1020b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; 1021b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey; 1022b8d26b3bSNicholas Bellinger 10234c22e07fSSagi Grimberg isert_dbg("Setup tx_sg[0].addr: 0x%llx length: %u lkey: 0x%x\n", 10244c22e07fSSagi Grimberg tx_desc->tx_sg[0].addr, tx_desc->tx_sg[0].length, 10254c22e07fSSagi Grimberg tx_desc->tx_sg[0].lkey); 1026b8d26b3bSNicholas Bellinger 1027b8d26b3bSNicholas Bellinger return 0; 1028b8d26b3bSNicholas Bellinger } 1029b8d26b3bSNicholas Bellinger 1030b8d26b3bSNicholas Bellinger static void 103195b60f07SNicholas Bellinger isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 103268a86deeSSagi Grimberg struct ib_send_wr *send_wr) 1033b8d26b3bSNicholas Bellinger { 103495b60f07SNicholas Bellinger struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; 103595b60f07SNicholas Bellinger 1036b8d26b3bSNicholas Bellinger isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; 1037b0a191e7SSagi Grimberg send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; 1038b8d26b3bSNicholas Bellinger send_wr->opcode = IB_WR_SEND; 103995b60f07SNicholas Bellinger send_wr->sg_list = &tx_desc->tx_sg[0]; 1040b8d26b3bSNicholas Bellinger send_wr->num_sge = isert_cmd->tx_desc.num_sge; 104195b60f07SNicholas Bellinger send_wr->send_flags = IB_SEND_SIGNALED; 1042b8d26b3bSNicholas Bellinger } 1043b8d26b3bSNicholas Bellinger 1044b8d26b3bSNicholas Bellinger static int 1045b8d26b3bSNicholas Bellinger isert_rdma_post_recvl(struct isert_conn *isert_conn) 1046b8d26b3bSNicholas Bellinger { 1047b8d26b3bSNicholas Bellinger struct ib_recv_wr rx_wr, *rx_wr_fail; 1048b8d26b3bSNicholas Bellinger struct ib_sge sge; 1049b8d26b3bSNicholas Bellinger int ret; 1050b8d26b3bSNicholas Bellinger 1051b8d26b3bSNicholas Bellinger memset(&sge, 0, sizeof(struct ib_sge)); 1052b8d26b3bSNicholas Bellinger sge.addr = isert_conn->login_req_dma; 1053b8d26b3bSNicholas Bellinger sge.length = ISER_RX_LOGIN_SIZE; 1054b8d26b3bSNicholas Bellinger sge.lkey = isert_conn->conn_mr->lkey; 1055b8d26b3bSNicholas Bellinger 105624f412ddSSagi Grimberg isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n", 1057b8d26b3bSNicholas Bellinger sge.addr, sge.length, sge.lkey); 1058b8d26b3bSNicholas Bellinger 1059b8d26b3bSNicholas Bellinger memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); 1060b0a191e7SSagi Grimberg rx_wr.wr_id = (uintptr_t)isert_conn->login_req_buf; 1061b8d26b3bSNicholas Bellinger rx_wr.sg_list = &sge; 1062b8d26b3bSNicholas Bellinger rx_wr.num_sge = 1; 1063b8d26b3bSNicholas Bellinger 1064b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count++; 1065b8d26b3bSNicholas Bellinger ret = ib_post_recv(isert_conn->conn_qp, &rx_wr, &rx_wr_fail); 1066b8d26b3bSNicholas Bellinger if (ret) { 106724f412ddSSagi Grimberg isert_err("ib_post_recv() failed: %d\n", ret); 1068b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count--; 1069b8d26b3bSNicholas Bellinger } 1070b8d26b3bSNicholas Bellinger 1071b8d26b3bSNicholas Bellinger return ret; 1072b8d26b3bSNicholas Bellinger } 1073b8d26b3bSNicholas Bellinger 1074b8d26b3bSNicholas Bellinger static int 1075b8d26b3bSNicholas Bellinger isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, 1076b8d26b3bSNicholas Bellinger u32 length) 1077b8d26b3bSNicholas Bellinger { 1078b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = conn->context; 1079b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1080b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc = &isert_conn->conn_login_tx_desc; 1081b8d26b3bSNicholas Bellinger int ret; 1082b8d26b3bSNicholas Bellinger 1083b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, NULL, tx_desc); 1084b8d26b3bSNicholas Bellinger 1085b8d26b3bSNicholas Bellinger memcpy(&tx_desc->iscsi_header, &login->rsp[0], 1086b8d26b3bSNicholas Bellinger sizeof(struct iscsi_hdr)); 1087b8d26b3bSNicholas Bellinger 1088b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, tx_desc); 1089b8d26b3bSNicholas Bellinger 1090b8d26b3bSNicholas Bellinger if (length > 0) { 1091b8d26b3bSNicholas Bellinger struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; 1092b8d26b3bSNicholas Bellinger 1093b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, 1094b8d26b3bSNicholas Bellinger length, DMA_TO_DEVICE); 1095b8d26b3bSNicholas Bellinger 1096b8d26b3bSNicholas Bellinger memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); 1097b8d26b3bSNicholas Bellinger 1098b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, 1099b8d26b3bSNicholas Bellinger length, DMA_TO_DEVICE); 1100b8d26b3bSNicholas Bellinger 1101b8d26b3bSNicholas Bellinger tx_dsg->addr = isert_conn->login_rsp_dma; 1102b8d26b3bSNicholas Bellinger tx_dsg->length = length; 1103b8d26b3bSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 1104b8d26b3bSNicholas Bellinger tx_desc->num_sge = 2; 1105b8d26b3bSNicholas Bellinger } 1106b8d26b3bSNicholas Bellinger if (!login->login_failed) { 1107b8d26b3bSNicholas Bellinger if (login->login_complete) { 1108e0546fc1SSagi Grimberg if (!conn->sess->sess_ops->SessionType && 1109e0546fc1SSagi Grimberg isert_conn->conn_device->use_fastreg) { 1110570db170SSagi Grimberg ret = isert_conn_create_fastreg_pool(isert_conn); 1111f46d6a8aSNicholas Bellinger if (ret) { 111224f412ddSSagi Grimberg isert_err("Conn: %p failed to create" 1113f46d6a8aSNicholas Bellinger " fastreg pool\n", isert_conn); 1114f46d6a8aSNicholas Bellinger return ret; 1115f46d6a8aSNicholas Bellinger } 1116f46d6a8aSNicholas Bellinger } 1117f46d6a8aSNicholas Bellinger 1118b8d26b3bSNicholas Bellinger ret = isert_alloc_rx_descriptors(isert_conn); 1119b8d26b3bSNicholas Bellinger if (ret) 1120b8d26b3bSNicholas Bellinger return ret; 1121b8d26b3bSNicholas Bellinger 1122b8d26b3bSNicholas Bellinger ret = isert_post_recv(isert_conn, ISERT_MIN_POSTED_RX); 1123b8d26b3bSNicholas Bellinger if (ret) 1124b8d26b3bSNicholas Bellinger return ret; 1125b8d26b3bSNicholas Bellinger 1126128e9cc8SSagi Grimberg /* Now we are in FULL_FEATURE phase */ 11272371e5daSSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 1128128e9cc8SSagi Grimberg isert_conn->state = ISER_CONN_FULL_FEATURE; 11292371e5daSSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 1130b8d26b3bSNicholas Bellinger goto post_send; 1131b8d26b3bSNicholas Bellinger } 1132b8d26b3bSNicholas Bellinger 1133b8d26b3bSNicholas Bellinger ret = isert_rdma_post_recvl(isert_conn); 1134b8d26b3bSNicholas Bellinger if (ret) 1135b8d26b3bSNicholas Bellinger return ret; 1136b8d26b3bSNicholas Bellinger } 1137b8d26b3bSNicholas Bellinger post_send: 1138b8d26b3bSNicholas Bellinger ret = isert_post_send(isert_conn, tx_desc); 1139b8d26b3bSNicholas Bellinger if (ret) 1140b8d26b3bSNicholas Bellinger return ret; 1141b8d26b3bSNicholas Bellinger 1142b8d26b3bSNicholas Bellinger return 0; 1143b8d26b3bSNicholas Bellinger } 1144b8d26b3bSNicholas Bellinger 1145b8d26b3bSNicholas Bellinger static void 11462371e5daSSagi Grimberg isert_rx_login_req(struct isert_conn *isert_conn) 1147b8d26b3bSNicholas Bellinger { 11482371e5daSSagi Grimberg struct iser_rx_desc *rx_desc = (void *)isert_conn->login_req_buf; 11492371e5daSSagi Grimberg int rx_buflen = isert_conn->login_req_len; 1150b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1151b8d26b3bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1152b8d26b3bSNicholas Bellinger int size; 1153b8d26b3bSNicholas Bellinger 115424f412ddSSagi Grimberg isert_info("conn %p\n", isert_conn); 11552371e5daSSagi Grimberg 11562371e5daSSagi Grimberg WARN_ON_ONCE(!login); 1157b8d26b3bSNicholas Bellinger 1158b8d26b3bSNicholas Bellinger if (login->first_request) { 1159b8d26b3bSNicholas Bellinger struct iscsi_login_req *login_req = 1160b8d26b3bSNicholas Bellinger (struct iscsi_login_req *)&rx_desc->iscsi_header; 1161b8d26b3bSNicholas Bellinger /* 1162b8d26b3bSNicholas Bellinger * Setup the initial iscsi_login values from the leading 1163b8d26b3bSNicholas Bellinger * login request PDU. 1164b8d26b3bSNicholas Bellinger */ 1165b8d26b3bSNicholas Bellinger login->leading_connection = (!login_req->tsih) ? 1 : 0; 1166b8d26b3bSNicholas Bellinger login->current_stage = 1167b8d26b3bSNicholas Bellinger (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) 1168b8d26b3bSNicholas Bellinger >> 2; 1169b8d26b3bSNicholas Bellinger login->version_min = login_req->min_version; 1170b8d26b3bSNicholas Bellinger login->version_max = login_req->max_version; 1171b8d26b3bSNicholas Bellinger memcpy(login->isid, login_req->isid, 6); 1172b8d26b3bSNicholas Bellinger login->cmd_sn = be32_to_cpu(login_req->cmdsn); 1173b8d26b3bSNicholas Bellinger login->init_task_tag = login_req->itt; 1174b8d26b3bSNicholas Bellinger login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); 1175b8d26b3bSNicholas Bellinger login->cid = be16_to_cpu(login_req->cid); 1176b8d26b3bSNicholas Bellinger login->tsih = be16_to_cpu(login_req->tsih); 1177b8d26b3bSNicholas Bellinger } 1178b8d26b3bSNicholas Bellinger 1179b8d26b3bSNicholas Bellinger memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); 1180b8d26b3bSNicholas Bellinger 1181b8d26b3bSNicholas Bellinger size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); 11824c22e07fSSagi Grimberg isert_dbg("Using login payload size: %d, rx_buflen: %d " 11834c22e07fSSagi Grimberg "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen, 11844c22e07fSSagi Grimberg MAX_KEY_VALUE_PAIRS); 1185b8d26b3bSNicholas Bellinger memcpy(login->req_buf, &rx_desc->data[0], size); 1186b8d26b3bSNicholas Bellinger 11876faaa85fSNicholas Bellinger if (login->first_request) { 1188b8d26b3bSNicholas Bellinger complete(&isert_conn->conn_login_comp); 11896faaa85fSNicholas Bellinger return; 11906faaa85fSNicholas Bellinger } 11916faaa85fSNicholas Bellinger schedule_delayed_work(&conn->login_work, 0); 1192b8d26b3bSNicholas Bellinger } 1193b8d26b3bSNicholas Bellinger 1194b8d26b3bSNicholas Bellinger static struct iscsi_cmd 1195676687c6SNicholas Bellinger *isert_allocate_cmd(struct iscsi_conn *conn) 1196b8d26b3bSNicholas Bellinger { 1197b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 1198b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd; 1199d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd; 1200b8d26b3bSNicholas Bellinger 1201676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); 1202d703ce2fSNicholas Bellinger if (!cmd) { 120324f412ddSSagi Grimberg isert_err("Unable to allocate iscsi_cmd + isert_cmd\n"); 1204b8d26b3bSNicholas Bellinger return NULL; 1205b8d26b3bSNicholas Bellinger } 1206d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1207b8d26b3bSNicholas Bellinger isert_cmd->conn = isert_conn; 1208d703ce2fSNicholas Bellinger isert_cmd->iscsi_cmd = cmd; 1209b8d26b3bSNicholas Bellinger 1210d703ce2fSNicholas Bellinger return cmd; 1211b8d26b3bSNicholas Bellinger } 1212b8d26b3bSNicholas Bellinger 1213b8d26b3bSNicholas Bellinger static int 1214b8d26b3bSNicholas Bellinger isert_handle_scsi_cmd(struct isert_conn *isert_conn, 1215d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, 1216d703ce2fSNicholas Bellinger struct iser_rx_desc *rx_desc, unsigned char *buf) 1217b8d26b3bSNicholas Bellinger { 1218b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1219b8d26b3bSNicholas Bellinger struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; 1220b8d26b3bSNicholas Bellinger struct scatterlist *sg; 1221b8d26b3bSNicholas Bellinger int imm_data, imm_data_len, unsol_data, sg_nents, rc; 1222b8d26b3bSNicholas Bellinger bool dump_payload = false; 1223b8d26b3bSNicholas Bellinger 1224b8d26b3bSNicholas Bellinger rc = iscsit_setup_scsi_cmd(conn, cmd, buf); 1225b8d26b3bSNicholas Bellinger if (rc < 0) 1226b8d26b3bSNicholas Bellinger return rc; 1227b8d26b3bSNicholas Bellinger 1228b8d26b3bSNicholas Bellinger imm_data = cmd->immediate_data; 1229b8d26b3bSNicholas Bellinger imm_data_len = cmd->first_burst_len; 1230b8d26b3bSNicholas Bellinger unsol_data = cmd->unsolicited_data; 1231b8d26b3bSNicholas Bellinger 1232b8d26b3bSNicholas Bellinger rc = iscsit_process_scsi_cmd(conn, cmd, hdr); 1233b8d26b3bSNicholas Bellinger if (rc < 0) { 1234b8d26b3bSNicholas Bellinger return 0; 1235b8d26b3bSNicholas Bellinger } else if (rc > 0) { 1236b8d26b3bSNicholas Bellinger dump_payload = true; 1237b8d26b3bSNicholas Bellinger goto sequence_cmd; 1238b8d26b3bSNicholas Bellinger } 1239b8d26b3bSNicholas Bellinger 1240b8d26b3bSNicholas Bellinger if (!imm_data) 1241b8d26b3bSNicholas Bellinger return 0; 1242b8d26b3bSNicholas Bellinger 1243b8d26b3bSNicholas Bellinger sg = &cmd->se_cmd.t_data_sg[0]; 1244b8d26b3bSNicholas Bellinger sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); 1245b8d26b3bSNicholas Bellinger 124624f412ddSSagi Grimberg isert_dbg("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n", 1247b8d26b3bSNicholas Bellinger sg, sg_nents, &rx_desc->data[0], imm_data_len); 1248b8d26b3bSNicholas Bellinger 1249b8d26b3bSNicholas Bellinger sg_copy_from_buffer(sg, sg_nents, &rx_desc->data[0], imm_data_len); 1250b8d26b3bSNicholas Bellinger 1251b8d26b3bSNicholas Bellinger cmd->write_data_done += imm_data_len; 1252b8d26b3bSNicholas Bellinger 1253b8d26b3bSNicholas Bellinger if (cmd->write_data_done == cmd->se_cmd.data_length) { 1254b8d26b3bSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 1255b8d26b3bSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 1256b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 1257b8d26b3bSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 1258b8d26b3bSNicholas Bellinger } 1259b8d26b3bSNicholas Bellinger 1260b8d26b3bSNicholas Bellinger sequence_cmd: 1261561bf158SNicholas Bellinger rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); 1262b8d26b3bSNicholas Bellinger 1263b8d26b3bSNicholas Bellinger if (!rc && dump_payload == false && unsol_data) 1264b8d26b3bSNicholas Bellinger iscsit_set_unsoliticed_dataout(cmd); 12656cc44a6fSNicholas Bellinger else if (dump_payload && imm_data) 12666cc44a6fSNicholas Bellinger target_put_sess_cmd(conn->sess->se_sess, &cmd->se_cmd); 1267b8d26b3bSNicholas Bellinger 1268b8d26b3bSNicholas Bellinger return 0; 1269b8d26b3bSNicholas Bellinger } 1270b8d26b3bSNicholas Bellinger 1271b8d26b3bSNicholas Bellinger static int 1272b8d26b3bSNicholas Bellinger isert_handle_iscsi_dataout(struct isert_conn *isert_conn, 1273b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc, unsigned char *buf) 1274b8d26b3bSNicholas Bellinger { 1275b8d26b3bSNicholas Bellinger struct scatterlist *sg_start; 1276b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1277b8d26b3bSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 1278b8d26b3bSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *)buf; 1279b8d26b3bSNicholas Bellinger u32 unsol_data_len = ntoh24(hdr->dlength); 1280b8d26b3bSNicholas Bellinger int rc, sg_nents, sg_off, page_off; 1281b8d26b3bSNicholas Bellinger 1282b8d26b3bSNicholas Bellinger rc = iscsit_check_dataout_hdr(conn, buf, &cmd); 1283b8d26b3bSNicholas Bellinger if (rc < 0) 1284b8d26b3bSNicholas Bellinger return rc; 1285b8d26b3bSNicholas Bellinger else if (!cmd) 1286b8d26b3bSNicholas Bellinger return 0; 1287b8d26b3bSNicholas Bellinger /* 1288b8d26b3bSNicholas Bellinger * FIXME: Unexpected unsolicited_data out 1289b8d26b3bSNicholas Bellinger */ 1290b8d26b3bSNicholas Bellinger if (!cmd->unsolicited_data) { 129124f412ddSSagi Grimberg isert_err("Received unexpected solicited data payload\n"); 1292b8d26b3bSNicholas Bellinger dump_stack(); 1293b8d26b3bSNicholas Bellinger return -1; 1294b8d26b3bSNicholas Bellinger } 1295b8d26b3bSNicholas Bellinger 12964c22e07fSSagi Grimberg isert_dbg("Unsolicited DataOut unsol_data_len: %u, " 12974c22e07fSSagi Grimberg "write_data_done: %u, data_length: %u\n", 12984c22e07fSSagi Grimberg unsol_data_len, cmd->write_data_done, 12994c22e07fSSagi Grimberg cmd->se_cmd.data_length); 1300b8d26b3bSNicholas Bellinger 1301b8d26b3bSNicholas Bellinger sg_off = cmd->write_data_done / PAGE_SIZE; 1302b8d26b3bSNicholas Bellinger sg_start = &cmd->se_cmd.t_data_sg[sg_off]; 1303b8d26b3bSNicholas Bellinger sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); 1304b8d26b3bSNicholas Bellinger page_off = cmd->write_data_done % PAGE_SIZE; 1305b8d26b3bSNicholas Bellinger /* 1306b8d26b3bSNicholas Bellinger * FIXME: Non page-aligned unsolicited_data out 1307b8d26b3bSNicholas Bellinger */ 1308b8d26b3bSNicholas Bellinger if (page_off) { 13094c22e07fSSagi Grimberg isert_err("unexpected non-page aligned data payload\n"); 1310b8d26b3bSNicholas Bellinger dump_stack(); 1311b8d26b3bSNicholas Bellinger return -1; 1312b8d26b3bSNicholas Bellinger } 13134c22e07fSSagi Grimberg isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u " 13144c22e07fSSagi Grimberg "sg_nents: %u from %p %u\n", sg_start, sg_off, 13154c22e07fSSagi Grimberg sg_nents, &rx_desc->data[0], unsol_data_len); 1316b8d26b3bSNicholas Bellinger 1317b8d26b3bSNicholas Bellinger sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], 1318b8d26b3bSNicholas Bellinger unsol_data_len); 1319b8d26b3bSNicholas Bellinger 1320b8d26b3bSNicholas Bellinger rc = iscsit_check_dataout_payload(cmd, hdr, false); 1321b8d26b3bSNicholas Bellinger if (rc < 0) 1322b8d26b3bSNicholas Bellinger return rc; 1323b8d26b3bSNicholas Bellinger 1324b8d26b3bSNicholas Bellinger return 0; 1325b8d26b3bSNicholas Bellinger } 1326b8d26b3bSNicholas Bellinger 1327b8d26b3bSNicholas Bellinger static int 1328778de368SNicholas Bellinger isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1329d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, 1330d703ce2fSNicholas Bellinger unsigned char *buf) 1331778de368SNicholas Bellinger { 1332778de368SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1333778de368SNicholas Bellinger struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; 1334778de368SNicholas Bellinger int rc; 1335778de368SNicholas Bellinger 1336778de368SNicholas Bellinger rc = iscsit_setup_nop_out(conn, cmd, hdr); 1337778de368SNicholas Bellinger if (rc < 0) 1338778de368SNicholas Bellinger return rc; 1339778de368SNicholas Bellinger /* 1340778de368SNicholas Bellinger * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload 1341778de368SNicholas Bellinger */ 1342778de368SNicholas Bellinger 1343778de368SNicholas Bellinger return iscsit_process_nop_out(conn, cmd, hdr); 1344778de368SNicholas Bellinger } 1345778de368SNicholas Bellinger 1346778de368SNicholas Bellinger static int 1347adb54c29SNicholas Bellinger isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1348d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, 1349d703ce2fSNicholas Bellinger struct iscsi_text *hdr) 1350adb54c29SNicholas Bellinger { 1351adb54c29SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1352adb54c29SNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 1353adb54c29SNicholas Bellinger int rc; 1354b44a2b67SSagi Grimberg unsigned char *text_in = NULL; 1355adb54c29SNicholas Bellinger 1356adb54c29SNicholas Bellinger rc = iscsit_setup_text_cmd(conn, cmd, hdr); 1357adb54c29SNicholas Bellinger if (rc < 0) 1358adb54c29SNicholas Bellinger return rc; 1359adb54c29SNicholas Bellinger 1360b44a2b67SSagi Grimberg if (payload_length) { 1361adb54c29SNicholas Bellinger text_in = kzalloc(payload_length, GFP_KERNEL); 1362adb54c29SNicholas Bellinger if (!text_in) { 136324f412ddSSagi Grimberg isert_err("Unable to allocate text_in of payload_length: %u\n", 1364adb54c29SNicholas Bellinger payload_length); 1365adb54c29SNicholas Bellinger return -ENOMEM; 1366adb54c29SNicholas Bellinger } 1367b44a2b67SSagi Grimberg } 1368adb54c29SNicholas Bellinger cmd->text_in_ptr = text_in; 1369adb54c29SNicholas Bellinger 1370adb54c29SNicholas Bellinger memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); 1371adb54c29SNicholas Bellinger 1372adb54c29SNicholas Bellinger return iscsit_process_text_cmd(conn, cmd, hdr); 1373adb54c29SNicholas Bellinger } 1374adb54c29SNicholas Bellinger 1375adb54c29SNicholas Bellinger static int 1376b8d26b3bSNicholas Bellinger isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, 1377b8d26b3bSNicholas Bellinger uint32_t read_stag, uint64_t read_va, 1378b8d26b3bSNicholas Bellinger uint32_t write_stag, uint64_t write_va) 1379b8d26b3bSNicholas Bellinger { 1380b8d26b3bSNicholas Bellinger struct iscsi_hdr *hdr = &rx_desc->iscsi_header; 1381b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1382ca40d24eSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1383b8d26b3bSNicholas Bellinger struct iscsi_cmd *cmd; 1384b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd; 1385b8d26b3bSNicholas Bellinger int ret = -EINVAL; 1386b8d26b3bSNicholas Bellinger u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); 1387b8d26b3bSNicholas Bellinger 1388ca40d24eSNicholas Bellinger if (sess->sess_ops->SessionType && 1389ca40d24eSNicholas Bellinger (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { 139024f412ddSSagi Grimberg isert_err("Got illegal opcode: 0x%02x in SessionType=Discovery," 1391ca40d24eSNicholas Bellinger " ignoring\n", opcode); 1392ca40d24eSNicholas Bellinger return 0; 1393ca40d24eSNicholas Bellinger } 1394ca40d24eSNicholas Bellinger 1395b8d26b3bSNicholas Bellinger switch (opcode) { 1396b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 1397676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1398b8d26b3bSNicholas Bellinger if (!cmd) 1399b8d26b3bSNicholas Bellinger break; 1400b8d26b3bSNicholas Bellinger 1401d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1402b8d26b3bSNicholas Bellinger isert_cmd->read_stag = read_stag; 1403b8d26b3bSNicholas Bellinger isert_cmd->read_va = read_va; 1404b8d26b3bSNicholas Bellinger isert_cmd->write_stag = write_stag; 1405b8d26b3bSNicholas Bellinger isert_cmd->write_va = write_va; 1406b8d26b3bSNicholas Bellinger 1407d703ce2fSNicholas Bellinger ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, 1408b8d26b3bSNicholas Bellinger rx_desc, (unsigned char *)hdr); 1409b8d26b3bSNicholas Bellinger break; 1410b8d26b3bSNicholas Bellinger case ISCSI_OP_NOOP_OUT: 1411676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1412b8d26b3bSNicholas Bellinger if (!cmd) 1413b8d26b3bSNicholas Bellinger break; 1414b8d26b3bSNicholas Bellinger 1415d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1416d703ce2fSNicholas Bellinger ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, 1417778de368SNicholas Bellinger rx_desc, (unsigned char *)hdr); 1418b8d26b3bSNicholas Bellinger break; 1419b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_DATA_OUT: 1420b8d26b3bSNicholas Bellinger ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, 1421b8d26b3bSNicholas Bellinger (unsigned char *)hdr); 1422b8d26b3bSNicholas Bellinger break; 1423b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 1424676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1425b8d26b3bSNicholas Bellinger if (!cmd) 1426b8d26b3bSNicholas Bellinger break; 1427b8d26b3bSNicholas Bellinger 1428b8d26b3bSNicholas Bellinger ret = iscsit_handle_task_mgt_cmd(conn, cmd, 1429b8d26b3bSNicholas Bellinger (unsigned char *)hdr); 1430b8d26b3bSNicholas Bellinger break; 1431b8d26b3bSNicholas Bellinger case ISCSI_OP_LOGOUT: 1432676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1433b8d26b3bSNicholas Bellinger if (!cmd) 1434b8d26b3bSNicholas Bellinger break; 1435b8d26b3bSNicholas Bellinger 1436b8d26b3bSNicholas Bellinger ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); 1437b8d26b3bSNicholas Bellinger break; 1438adb54c29SNicholas Bellinger case ISCSI_OP_TEXT: 1439676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1440adb54c29SNicholas Bellinger if (!cmd) 1441adb54c29SNicholas Bellinger break; 1442adb54c29SNicholas Bellinger 1443d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1444d703ce2fSNicholas Bellinger ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, 1445adb54c29SNicholas Bellinger rx_desc, (struct iscsi_text *)hdr); 1446adb54c29SNicholas Bellinger break; 1447b8d26b3bSNicholas Bellinger default: 144824f412ddSSagi Grimberg isert_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); 1449b8d26b3bSNicholas Bellinger dump_stack(); 1450b8d26b3bSNicholas Bellinger break; 1451b8d26b3bSNicholas Bellinger } 1452b8d26b3bSNicholas Bellinger 1453b8d26b3bSNicholas Bellinger return ret; 1454b8d26b3bSNicholas Bellinger } 1455b8d26b3bSNicholas Bellinger 1456b8d26b3bSNicholas Bellinger static void 1457b8d26b3bSNicholas Bellinger isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) 1458b8d26b3bSNicholas Bellinger { 1459b8d26b3bSNicholas Bellinger struct iser_hdr *iser_hdr = &rx_desc->iser_header; 1460b8d26b3bSNicholas Bellinger uint64_t read_va = 0, write_va = 0; 1461b8d26b3bSNicholas Bellinger uint32_t read_stag = 0, write_stag = 0; 1462b8d26b3bSNicholas Bellinger int rc; 1463b8d26b3bSNicholas Bellinger 1464b8d26b3bSNicholas Bellinger switch (iser_hdr->flags & 0xF0) { 1465b8d26b3bSNicholas Bellinger case ISCSI_CTRL: 1466b8d26b3bSNicholas Bellinger if (iser_hdr->flags & ISER_RSV) { 1467b8d26b3bSNicholas Bellinger read_stag = be32_to_cpu(iser_hdr->read_stag); 1468b8d26b3bSNicholas Bellinger read_va = be64_to_cpu(iser_hdr->read_va); 14694c22e07fSSagi Grimberg isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n", 1470b8d26b3bSNicholas Bellinger read_stag, (unsigned long long)read_va); 1471b8d26b3bSNicholas Bellinger } 1472b8d26b3bSNicholas Bellinger if (iser_hdr->flags & ISER_WSV) { 1473b8d26b3bSNicholas Bellinger write_stag = be32_to_cpu(iser_hdr->write_stag); 1474b8d26b3bSNicholas Bellinger write_va = be64_to_cpu(iser_hdr->write_va); 14754c22e07fSSagi Grimberg isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n", 1476b8d26b3bSNicholas Bellinger write_stag, (unsigned long long)write_va); 1477b8d26b3bSNicholas Bellinger } 1478b8d26b3bSNicholas Bellinger 147924f412ddSSagi Grimberg isert_dbg("ISER ISCSI_CTRL PDU\n"); 1480b8d26b3bSNicholas Bellinger break; 1481b8d26b3bSNicholas Bellinger case ISER_HELLO: 148224f412ddSSagi Grimberg isert_err("iSER Hello message\n"); 1483b8d26b3bSNicholas Bellinger break; 1484b8d26b3bSNicholas Bellinger default: 148524f412ddSSagi Grimberg isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags); 1486b8d26b3bSNicholas Bellinger break; 1487b8d26b3bSNicholas Bellinger } 1488b8d26b3bSNicholas Bellinger 1489b8d26b3bSNicholas Bellinger rc = isert_rx_opcode(isert_conn, rx_desc, 1490b8d26b3bSNicholas Bellinger read_stag, read_va, write_stag, write_va); 1491b8d26b3bSNicholas Bellinger } 1492b8d26b3bSNicholas Bellinger 1493b8d26b3bSNicholas Bellinger static void 1494b8d26b3bSNicholas Bellinger isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn, 14954a295baeSSagi Grimberg u32 xfer_len) 1496b8d26b3bSNicholas Bellinger { 1497b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1498b8d26b3bSNicholas Bellinger struct iscsi_hdr *hdr; 1499b8d26b3bSNicholas Bellinger u64 rx_dma; 1500b8d26b3bSNicholas Bellinger int rx_buflen, outstanding; 1501b8d26b3bSNicholas Bellinger 1502b8d26b3bSNicholas Bellinger if ((char *)desc == isert_conn->login_req_buf) { 1503b8d26b3bSNicholas Bellinger rx_dma = isert_conn->login_req_dma; 1504b8d26b3bSNicholas Bellinger rx_buflen = ISER_RX_LOGIN_SIZE; 15054c22e07fSSagi Grimberg isert_dbg("login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", 1506b8d26b3bSNicholas Bellinger rx_dma, rx_buflen); 1507b8d26b3bSNicholas Bellinger } else { 1508b8d26b3bSNicholas Bellinger rx_dma = desc->dma_addr; 1509b8d26b3bSNicholas Bellinger rx_buflen = ISER_RX_PAYLOAD_SIZE; 15104c22e07fSSagi Grimberg isert_dbg("req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", 1511b8d26b3bSNicholas Bellinger rx_dma, rx_buflen); 1512b8d26b3bSNicholas Bellinger } 1513b8d26b3bSNicholas Bellinger 1514b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); 1515b8d26b3bSNicholas Bellinger 1516b8d26b3bSNicholas Bellinger hdr = &desc->iscsi_header; 151724f412ddSSagi Grimberg isert_dbg("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", 1518b8d26b3bSNicholas Bellinger hdr->opcode, hdr->itt, hdr->flags, 1519b8d26b3bSNicholas Bellinger (int)(xfer_len - ISER_HEADERS_LEN)); 1520b8d26b3bSNicholas Bellinger 15212371e5daSSagi Grimberg if ((char *)desc == isert_conn->login_req_buf) { 15222371e5daSSagi Grimberg isert_conn->login_req_len = xfer_len - ISER_HEADERS_LEN; 15232371e5daSSagi Grimberg if (isert_conn->conn) { 15242371e5daSSagi Grimberg struct iscsi_login *login = isert_conn->conn->conn_login; 15252371e5daSSagi Grimberg 15262371e5daSSagi Grimberg if (login && !login->first_request) 15272371e5daSSagi Grimberg isert_rx_login_req(isert_conn); 15282371e5daSSagi Grimberg } 15292371e5daSSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 15302371e5daSSagi Grimberg complete(&isert_conn->login_req_comp); 15312371e5daSSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 15322371e5daSSagi Grimberg } else { 1533b8d26b3bSNicholas Bellinger isert_rx_do_work(desc, isert_conn); 15342371e5daSSagi Grimberg } 1535b8d26b3bSNicholas Bellinger 1536b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, 1537b8d26b3bSNicholas Bellinger DMA_FROM_DEVICE); 1538b8d26b3bSNicholas Bellinger 1539b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count--; 15404c22e07fSSagi Grimberg isert_dbg("Decremented post_recv_buf_count: %d\n", 1541b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count); 1542b8d26b3bSNicholas Bellinger 1543b8d26b3bSNicholas Bellinger if ((char *)desc == isert_conn->login_req_buf) 1544b8d26b3bSNicholas Bellinger return; 1545b8d26b3bSNicholas Bellinger 1546b8d26b3bSNicholas Bellinger outstanding = isert_conn->post_recv_buf_count; 1547b8d26b3bSNicholas Bellinger if (outstanding + ISERT_MIN_POSTED_RX <= ISERT_QP_MAX_RECV_DTOS) { 1548b8d26b3bSNicholas Bellinger int err, count = min(ISERT_QP_MAX_RECV_DTOS - outstanding, 1549b8d26b3bSNicholas Bellinger ISERT_MIN_POSTED_RX); 1550b8d26b3bSNicholas Bellinger err = isert_post_recv(isert_conn, count); 1551b8d26b3bSNicholas Bellinger if (err) { 155224f412ddSSagi Grimberg isert_err("isert_post_recv() count: %d failed, %d\n", 1553b8d26b3bSNicholas Bellinger count, err); 1554b8d26b3bSNicholas Bellinger } 1555b8d26b3bSNicholas Bellinger } 1556b8d26b3bSNicholas Bellinger } 1557b8d26b3bSNicholas Bellinger 1558e3d7e4c3SSagi Grimberg static int 1559e3d7e4c3SSagi Grimberg isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1560e3d7e4c3SSagi Grimberg struct scatterlist *sg, u32 nents, u32 length, u32 offset, 1561e3d7e4c3SSagi Grimberg enum iser_ib_op_code op, struct isert_data_buf *data) 1562e3d7e4c3SSagi Grimberg { 1563e3d7e4c3SSagi Grimberg struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1564e3d7e4c3SSagi Grimberg 1565e3d7e4c3SSagi Grimberg data->dma_dir = op == ISER_IB_RDMA_WRITE ? 1566e3d7e4c3SSagi Grimberg DMA_TO_DEVICE : DMA_FROM_DEVICE; 1567e3d7e4c3SSagi Grimberg 1568e3d7e4c3SSagi Grimberg data->len = length - offset; 1569e3d7e4c3SSagi Grimberg data->offset = offset; 1570e3d7e4c3SSagi Grimberg data->sg_off = data->offset / PAGE_SIZE; 1571e3d7e4c3SSagi Grimberg 1572e3d7e4c3SSagi Grimberg data->sg = &sg[data->sg_off]; 1573e3d7e4c3SSagi Grimberg data->nents = min_t(unsigned int, nents - data->sg_off, 1574e3d7e4c3SSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 1575e3d7e4c3SSagi Grimberg data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * 1576e3d7e4c3SSagi Grimberg PAGE_SIZE); 1577e3d7e4c3SSagi Grimberg 1578e3d7e4c3SSagi Grimberg data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, 1579e3d7e4c3SSagi Grimberg data->dma_dir); 1580e3d7e4c3SSagi Grimberg if (unlikely(!data->dma_nents)) { 158124f412ddSSagi Grimberg isert_err("Cmd: unable to dma map SGs %p\n", sg); 1582e3d7e4c3SSagi Grimberg return -EINVAL; 1583e3d7e4c3SSagi Grimberg } 1584e3d7e4c3SSagi Grimberg 158524f412ddSSagi Grimberg isert_dbg("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", 1586e3d7e4c3SSagi Grimberg isert_cmd, data->dma_nents, data->sg, data->nents, data->len); 1587e3d7e4c3SSagi Grimberg 1588e3d7e4c3SSagi Grimberg return 0; 1589e3d7e4c3SSagi Grimberg } 1590e3d7e4c3SSagi Grimberg 1591e3d7e4c3SSagi Grimberg static void 1592e3d7e4c3SSagi Grimberg isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) 1593e3d7e4c3SSagi Grimberg { 1594e3d7e4c3SSagi Grimberg struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1595e3d7e4c3SSagi Grimberg 1596e3d7e4c3SSagi Grimberg ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); 1597e3d7e4c3SSagi Grimberg memset(data, 0, sizeof(*data)); 1598e3d7e4c3SSagi Grimberg } 1599e3d7e4c3SSagi Grimberg 1600e3d7e4c3SSagi Grimberg 1601e3d7e4c3SSagi Grimberg 1602b8d26b3bSNicholas Bellinger static void 1603b8d26b3bSNicholas Bellinger isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) 1604b8d26b3bSNicholas Bellinger { 1605b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 1606b8d26b3bSNicholas Bellinger 16074c22e07fSSagi Grimberg isert_dbg("Cmd %p\n", isert_cmd); 1608e3d7e4c3SSagi Grimberg 1609e3d7e4c3SSagi Grimberg if (wr->data.sg) { 16104c22e07fSSagi Grimberg isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); 1611e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 1612b8d26b3bSNicholas Bellinger } 1613b8d26b3bSNicholas Bellinger 161490ecc6e2SVu Pham if (wr->send_wr) { 16154c22e07fSSagi Grimberg isert_dbg("Cmd %p free send_wr\n", isert_cmd); 1616b8d26b3bSNicholas Bellinger kfree(wr->send_wr); 1617b8d26b3bSNicholas Bellinger wr->send_wr = NULL; 161890ecc6e2SVu Pham } 1619b8d26b3bSNicholas Bellinger 162090ecc6e2SVu Pham if (wr->ib_sge) { 16214c22e07fSSagi Grimberg isert_dbg("Cmd %p free ib_sge\n", isert_cmd); 162290ecc6e2SVu Pham kfree(wr->ib_sge); 162390ecc6e2SVu Pham wr->ib_sge = NULL; 162490ecc6e2SVu Pham } 1625b8d26b3bSNicholas Bellinger } 1626b8d26b3bSNicholas Bellinger 1627b8d26b3bSNicholas Bellinger static void 1628a3a5a826SSagi Grimberg isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) 162959464ef4SVu Pham { 163059464ef4SVu Pham struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 163159464ef4SVu Pham LIST_HEAD(unmap_list); 163259464ef4SVu Pham 16334c22e07fSSagi Grimberg isert_dbg("Cmd %p\n", isert_cmd); 163459464ef4SVu Pham 163559464ef4SVu Pham if (wr->fr_desc) { 16364c22e07fSSagi Grimberg isert_dbg("Cmd %p free fr_desc %p\n", isert_cmd, wr->fr_desc); 16379e961ae7SSagi Grimberg if (wr->fr_desc->ind & ISERT_PROTECTED) { 16389e961ae7SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->prot); 16399e961ae7SSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 16409e961ae7SSagi Grimberg } 164159464ef4SVu Pham spin_lock_bh(&isert_conn->conn_lock); 1642a3a5a826SSagi Grimberg list_add_tail(&wr->fr_desc->list, &isert_conn->conn_fr_pool); 164359464ef4SVu Pham spin_unlock_bh(&isert_conn->conn_lock); 164459464ef4SVu Pham wr->fr_desc = NULL; 164559464ef4SVu Pham } 164659464ef4SVu Pham 1647e3d7e4c3SSagi Grimberg if (wr->data.sg) { 16484c22e07fSSagi Grimberg isert_dbg("Cmd %p unmap_sg op\n", isert_cmd); 1649e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 165059464ef4SVu Pham } 165159464ef4SVu Pham 165259464ef4SVu Pham wr->ib_sge = NULL; 165359464ef4SVu Pham wr->send_wr = NULL; 165459464ef4SVu Pham } 165559464ef4SVu Pham 165659464ef4SVu Pham static void 165703e7848aSNicholas Bellinger isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err) 1658b8d26b3bSNicholas Bellinger { 1659d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1660b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = isert_cmd->conn; 1661186a9647SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1662d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 1663b8d26b3bSNicholas Bellinger 16644c22e07fSSagi Grimberg isert_dbg("Cmd %p\n", isert_cmd); 1665b8d26b3bSNicholas Bellinger 1666b8d26b3bSNicholas Bellinger switch (cmd->iscsi_opcode) { 1667b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 1668b8d26b3bSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1669b8d26b3bSNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 16705159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1671b8d26b3bSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1672b8d26b3bSNicholas Bellinger 167303e7848aSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) { 1674b8d26b3bSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 167503e7848aSNicholas Bellinger /* 167603e7848aSNicholas Bellinger * Check for special case during comp_err where 167703e7848aSNicholas Bellinger * WRITE_PENDING has been handed off from core, 167803e7848aSNicholas Bellinger * but requires an extra target_put_sess_cmd() 167903e7848aSNicholas Bellinger * before transport_generic_free_cmd() below. 168003e7848aSNicholas Bellinger */ 168103e7848aSNicholas Bellinger if (comp_err && 168203e7848aSNicholas Bellinger cmd->se_cmd.t_state == TRANSPORT_WRITE_PENDING) { 168303e7848aSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 168403e7848aSNicholas Bellinger 168503e7848aSNicholas Bellinger target_put_sess_cmd(se_cmd->se_sess, se_cmd); 168603e7848aSNicholas Bellinger } 168703e7848aSNicholas Bellinger } 1688b8d26b3bSNicholas Bellinger 1689d40945d8SVu Pham device->unreg_rdma_mem(isert_cmd, isert_conn); 1690186a9647SNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1691186a9647SNicholas Bellinger break; 1692b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 1693186a9647SNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1694186a9647SNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 16955159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1696186a9647SNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1697186a9647SNicholas Bellinger 1698b8d26b3bSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1699b8d26b3bSNicholas Bellinger break; 1700b8d26b3bSNicholas Bellinger case ISCSI_OP_REJECT: 1701b8d26b3bSNicholas Bellinger case ISCSI_OP_NOOP_OUT: 1702adb54c29SNicholas Bellinger case ISCSI_OP_TEXT: 1703b8d26b3bSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1704b8d26b3bSNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 17055159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1706b8d26b3bSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1707b8d26b3bSNicholas Bellinger 1708b8d26b3bSNicholas Bellinger /* 1709b8d26b3bSNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 1710b8d26b3bSNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 1711b8d26b3bSNicholas Bellinger * associated cmd->se_cmd needs to be released. 1712b8d26b3bSNicholas Bellinger */ 1713b8d26b3bSNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 1714*11378cdbSRasmus Villemoes isert_dbg("Calling transport_generic_free_cmd for 0x%02x\n", 17153df8f68aSNicholas Bellinger cmd->iscsi_opcode); 1716b8d26b3bSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1717b8d26b3bSNicholas Bellinger break; 1718b8d26b3bSNicholas Bellinger } 1719b8d26b3bSNicholas Bellinger /* 1720b8d26b3bSNicholas Bellinger * Fall-through 1721b8d26b3bSNicholas Bellinger */ 1722b8d26b3bSNicholas Bellinger default: 1723d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 1724b8d26b3bSNicholas Bellinger break; 1725b8d26b3bSNicholas Bellinger } 1726b8d26b3bSNicholas Bellinger } 1727b8d26b3bSNicholas Bellinger 1728b8d26b3bSNicholas Bellinger static void 1729b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) 1730b8d26b3bSNicholas Bellinger { 1731b8d26b3bSNicholas Bellinger if (tx_desc->dma_addr != 0) { 17324c22e07fSSagi Grimberg isert_dbg("unmap single for tx_desc->dma_addr\n"); 1733b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, 1734b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 1735b8d26b3bSNicholas Bellinger tx_desc->dma_addr = 0; 1736b8d26b3bSNicholas Bellinger } 1737b8d26b3bSNicholas Bellinger } 1738b8d26b3bSNicholas Bellinger 1739b8d26b3bSNicholas Bellinger static void 1740b8d26b3bSNicholas Bellinger isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, 174103e7848aSNicholas Bellinger struct ib_device *ib_dev, bool comp_err) 1742b8d26b3bSNicholas Bellinger { 1743dbbc5d11SNicholas Bellinger if (isert_cmd->pdu_buf_dma != 0) { 17444c22e07fSSagi Grimberg isert_dbg("unmap single for isert_cmd->pdu_buf_dma\n"); 1745dbbc5d11SNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, 1746dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len, DMA_TO_DEVICE); 1747dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = 0; 1748b8d26b3bSNicholas Bellinger } 1749b8d26b3bSNicholas Bellinger 1750b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 175103e7848aSNicholas Bellinger isert_put_cmd(isert_cmd, comp_err); 1752b8d26b3bSNicholas Bellinger } 1753b8d26b3bSNicholas Bellinger 175496b7973eSSagi Grimberg static int 175596b7973eSSagi Grimberg isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) 1756f93f3a70SSagi Grimberg { 17579e961ae7SSagi Grimberg struct ib_mr_status mr_status; 175896b7973eSSagi Grimberg int ret; 1759f93f3a70SSagi Grimberg 176096b7973eSSagi Grimberg ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); 17619e961ae7SSagi Grimberg if (ret) { 176224f412ddSSagi Grimberg isert_err("ib_check_mr_status failed, ret %d\n", ret); 17639e961ae7SSagi Grimberg goto fail_mr_status; 17649e961ae7SSagi Grimberg } 176596b7973eSSagi Grimberg 17669e961ae7SSagi Grimberg if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { 176796b7973eSSagi Grimberg u64 sec_offset_err; 17689e961ae7SSagi Grimberg u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; 17699e961ae7SSagi Grimberg 17709e961ae7SSagi Grimberg switch (mr_status.sig_err.err_type) { 17719e961ae7SSagi Grimberg case IB_SIG_BAD_GUARD: 17729e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 17739e961ae7SSagi Grimberg break; 17749e961ae7SSagi Grimberg case IB_SIG_BAD_REFTAG: 17759e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 17769e961ae7SSagi Grimberg break; 17779e961ae7SSagi Grimberg case IB_SIG_BAD_APPTAG: 17789e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 17799e961ae7SSagi Grimberg break; 17809e961ae7SSagi Grimberg } 178196b7973eSSagi Grimberg sec_offset_err = mr_status.sig_err.sig_err_offset; 178296b7973eSSagi Grimberg do_div(sec_offset_err, block_size); 178396b7973eSSagi Grimberg se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; 17849e961ae7SSagi Grimberg 17854c22e07fSSagi Grimberg isert_err("PI error found type %d at sector 0x%llx " 17869e961ae7SSagi Grimberg "expected 0x%x vs actual 0x%x\n", 17879e961ae7SSagi Grimberg mr_status.sig_err.err_type, 17889e961ae7SSagi Grimberg (unsigned long long)se_cmd->bad_sector, 17899e961ae7SSagi Grimberg mr_status.sig_err.expected, 17909e961ae7SSagi Grimberg mr_status.sig_err.actual); 17919e961ae7SSagi Grimberg ret = 1; 17929e961ae7SSagi Grimberg } 17939e961ae7SSagi Grimberg 17949e961ae7SSagi Grimberg fail_mr_status: 179596b7973eSSagi Grimberg return ret; 179696b7973eSSagi Grimberg } 179796b7973eSSagi Grimberg 179896b7973eSSagi Grimberg static void 179996b7973eSSagi Grimberg isert_completion_rdma_write(struct iser_tx_desc *tx_desc, 180096b7973eSSagi Grimberg struct isert_cmd *isert_cmd) 180196b7973eSSagi Grimberg { 180296b7973eSSagi Grimberg struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 180396b7973eSSagi Grimberg struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 180496b7973eSSagi Grimberg struct se_cmd *se_cmd = &cmd->se_cmd; 180596b7973eSSagi Grimberg struct isert_conn *isert_conn = isert_cmd->conn; 180696b7973eSSagi Grimberg struct isert_device *device = isert_conn->conn_device; 180796b7973eSSagi Grimberg int ret = 0; 180896b7973eSSagi Grimberg 180996b7973eSSagi Grimberg if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { 181096b7973eSSagi Grimberg ret = isert_check_pi_status(se_cmd, 181196b7973eSSagi Grimberg wr->fr_desc->pi_ctx->sig_mr); 181296b7973eSSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 181396b7973eSSagi Grimberg } 181496b7973eSSagi Grimberg 1815f93f3a70SSagi Grimberg device->unreg_rdma_mem(isert_cmd, isert_conn); 1816897bb2c9SSagi Grimberg wr->send_wr_num = 0; 18179e961ae7SSagi Grimberg if (ret) 18189e961ae7SSagi Grimberg transport_send_check_condition_and_sense(se_cmd, 18199e961ae7SSagi Grimberg se_cmd->pi_err, 0); 18209e961ae7SSagi Grimberg else 1821f93f3a70SSagi Grimberg isert_put_response(isert_conn->conn, cmd); 1822f93f3a70SSagi Grimberg } 1823f93f3a70SSagi Grimberg 1824f93f3a70SSagi Grimberg static void 1825b8d26b3bSNicholas Bellinger isert_completion_rdma_read(struct iser_tx_desc *tx_desc, 1826b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd) 1827b8d26b3bSNicholas Bellinger { 1828b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 1829d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1830b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 183190ecc6e2SVu Pham struct isert_conn *isert_conn = isert_cmd->conn; 1832d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 18335bac4b1aSSagi Grimberg int ret = 0; 1834b8d26b3bSNicholas Bellinger 18359e961ae7SSagi Grimberg if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { 183696b7973eSSagi Grimberg ret = isert_check_pi_status(se_cmd, 183796b7973eSSagi Grimberg wr->fr_desc->pi_ctx->sig_mr); 183896b7973eSSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 18399e961ae7SSagi Grimberg } 18409e961ae7SSagi Grimberg 1841b8d26b3bSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 1842d40945d8SVu Pham device->unreg_rdma_mem(isert_cmd, isert_conn); 1843e3d7e4c3SSagi Grimberg cmd->write_data_done = wr->data.len; 1844b6b87a1dSNicholas Bellinger wr->send_wr_num = 0; 1845b8d26b3bSNicholas Bellinger 184624f412ddSSagi Grimberg isert_dbg("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); 1847b8d26b3bSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 1848b8d26b3bSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 1849b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 1850b8d26b3bSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 1851b8d26b3bSNicholas Bellinger 18525bac4b1aSSagi Grimberg if (ret) 18535bac4b1aSSagi Grimberg transport_send_check_condition_and_sense(se_cmd, 18545bac4b1aSSagi Grimberg se_cmd->pi_err, 0); 18555bac4b1aSSagi Grimberg else 1856b8d26b3bSNicholas Bellinger target_execute_cmd(se_cmd); 1857b8d26b3bSNicholas Bellinger } 1858b8d26b3bSNicholas Bellinger 1859b8d26b3bSNicholas Bellinger static void 1860b8d26b3bSNicholas Bellinger isert_do_control_comp(struct work_struct *work) 1861b8d26b3bSNicholas Bellinger { 1862b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd = container_of(work, 1863b8d26b3bSNicholas Bellinger struct isert_cmd, comp_work); 1864b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = isert_cmd->conn; 1865b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1866d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1867b8d26b3bSNicholas Bellinger 18684c22e07fSSagi Grimberg isert_dbg("Cmd %p i_state %d\n", isert_cmd, cmd->i_state); 18694c22e07fSSagi Grimberg 1870b8d26b3bSNicholas Bellinger switch (cmd->i_state) { 1871b8d26b3bSNicholas Bellinger case ISTATE_SEND_TASKMGTRSP: 1872b8d26b3bSNicholas Bellinger iscsit_tmr_post_handler(cmd, cmd->conn); 187310633c37SSagi Grimberg case ISTATE_SEND_REJECT: /* FALLTHRU */ 187410633c37SSagi Grimberg case ISTATE_SEND_TEXTRSP: /* FALLTHRU */ 1875b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 18764c22e07fSSagi Grimberg isert_completion_put(&isert_cmd->tx_desc, isert_cmd, 18774c22e07fSSagi Grimberg ib_dev, false); 18783df8f68aSNicholas Bellinger break; 1879b8d26b3bSNicholas Bellinger case ISTATE_SEND_LOGOUTRSP: 1880b8d26b3bSNicholas Bellinger iscsit_logout_post_handler(cmd, cmd->conn); 1881b8d26b3bSNicholas Bellinger break; 1882b8d26b3bSNicholas Bellinger default: 18834c22e07fSSagi Grimberg isert_err("Unknown i_state %d\n", cmd->i_state); 1884b8d26b3bSNicholas Bellinger dump_stack(); 1885b8d26b3bSNicholas Bellinger break; 1886b8d26b3bSNicholas Bellinger } 1887b8d26b3bSNicholas Bellinger } 1888b8d26b3bSNicholas Bellinger 1889b8d26b3bSNicholas Bellinger static void 1890b8d26b3bSNicholas Bellinger isert_response_completion(struct iser_tx_desc *tx_desc, 1891b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd, 1892b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn, 1893b8d26b3bSNicholas Bellinger struct ib_device *ib_dev) 1894b8d26b3bSNicholas Bellinger { 1895d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1896b8d26b3bSNicholas Bellinger 1897b8d26b3bSNicholas Bellinger if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || 18983df8f68aSNicholas Bellinger cmd->i_state == ISTATE_SEND_LOGOUTRSP || 1899adb54c29SNicholas Bellinger cmd->i_state == ISTATE_SEND_REJECT || 1900adb54c29SNicholas Bellinger cmd->i_state == ISTATE_SEND_TEXTRSP) { 1901b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 1902b8d26b3bSNicholas Bellinger 1903b8d26b3bSNicholas Bellinger INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); 1904b8d26b3bSNicholas Bellinger queue_work(isert_comp_wq, &isert_cmd->comp_work); 1905b8d26b3bSNicholas Bellinger return; 1906b8d26b3bSNicholas Bellinger } 1907897bb2c9SSagi Grimberg 1908b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 190903e7848aSNicholas Bellinger isert_completion_put(tx_desc, isert_cmd, ib_dev, false); 1910b8d26b3bSNicholas Bellinger } 1911b8d26b3bSNicholas Bellinger 1912b8d26b3bSNicholas Bellinger static void 191368a86deeSSagi Grimberg isert_send_completion(struct iser_tx_desc *tx_desc, 1914b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn) 1915b8d26b3bSNicholas Bellinger { 1916b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1917b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd = tx_desc->isert_cmd; 1918b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr; 1919b8d26b3bSNicholas Bellinger 1920b8d26b3bSNicholas Bellinger if (!isert_cmd) { 1921b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 1922b8d26b3bSNicholas Bellinger return; 1923b8d26b3bSNicholas Bellinger } 1924b8d26b3bSNicholas Bellinger wr = &isert_cmd->rdma_wr; 1925b8d26b3bSNicholas Bellinger 19264c22e07fSSagi Grimberg isert_dbg("Cmd %p iser_ib_op %d\n", isert_cmd, wr->iser_ib_op); 19274c22e07fSSagi Grimberg 1928b8d26b3bSNicholas Bellinger switch (wr->iser_ib_op) { 1929b8d26b3bSNicholas Bellinger case ISER_IB_RECV: 19304c22e07fSSagi Grimberg isert_err("Got ISER_IB_RECV\n"); 1931b8d26b3bSNicholas Bellinger dump_stack(); 1932b8d26b3bSNicholas Bellinger break; 1933b8d26b3bSNicholas Bellinger case ISER_IB_SEND: 1934b8d26b3bSNicholas Bellinger isert_response_completion(tx_desc, isert_cmd, 1935b8d26b3bSNicholas Bellinger isert_conn, ib_dev); 1936b8d26b3bSNicholas Bellinger break; 1937b8d26b3bSNicholas Bellinger case ISER_IB_RDMA_WRITE: 1938f93f3a70SSagi Grimberg isert_completion_rdma_write(tx_desc, isert_cmd); 1939b8d26b3bSNicholas Bellinger break; 1940b8d26b3bSNicholas Bellinger case ISER_IB_RDMA_READ: 1941b8d26b3bSNicholas Bellinger isert_completion_rdma_read(tx_desc, isert_cmd); 1942b8d26b3bSNicholas Bellinger break; 1943b8d26b3bSNicholas Bellinger default: 19444c22e07fSSagi Grimberg isert_err("Unknown wr->iser_ib_op: 0x%x\n", wr->iser_ib_op); 1945b8d26b3bSNicholas Bellinger dump_stack(); 1946b8d26b3bSNicholas Bellinger break; 1947b8d26b3bSNicholas Bellinger } 1948b8d26b3bSNicholas Bellinger } 1949b8d26b3bSNicholas Bellinger 19506f0fae3dSSagi Grimberg /** 19516f0fae3dSSagi Grimberg * is_isert_tx_desc() - Indicate if the completion wr_id 19526f0fae3dSSagi Grimberg * is a TX descriptor or not. 19536f0fae3dSSagi Grimberg * @isert_conn: iser connection 19546f0fae3dSSagi Grimberg * @wr_id: completion WR identifier 19556f0fae3dSSagi Grimberg * 19566f0fae3dSSagi Grimberg * Since we cannot rely on wc opcode in FLUSH errors 19576f0fae3dSSagi Grimberg * we must work around it by checking if the wr_id address 19586f0fae3dSSagi Grimberg * falls in the iser connection rx_descs buffer. If so 19596f0fae3dSSagi Grimberg * it is an RX descriptor, otherwize it is a TX. 19606f0fae3dSSagi Grimberg */ 19616f0fae3dSSagi Grimberg static inline bool 19626f0fae3dSSagi Grimberg is_isert_tx_desc(struct isert_conn *isert_conn, void *wr_id) 1963b8d26b3bSNicholas Bellinger { 19646f0fae3dSSagi Grimberg void *start = isert_conn->conn_rx_descs; 19656f0fae3dSSagi Grimberg int len = ISERT_QP_MAX_RECV_DTOS * sizeof(*isert_conn->conn_rx_descs); 19666f0fae3dSSagi Grimberg 19676f0fae3dSSagi Grimberg if (wr_id >= start && wr_id < start + len) 19686f0fae3dSSagi Grimberg return false; 19696f0fae3dSSagi Grimberg 19706f0fae3dSSagi Grimberg return true; 19716f0fae3dSSagi Grimberg } 19726f0fae3dSSagi Grimberg 19736f0fae3dSSagi Grimberg static void 19746f0fae3dSSagi Grimberg isert_cq_comp_err(struct isert_conn *isert_conn, struct ib_wc *wc) 19756f0fae3dSSagi Grimberg { 1976bdf20e72SSagi Grimberg if (wc->wr_id == ISER_BEACON_WRID) { 197724f412ddSSagi Grimberg isert_info("conn %p completing conn_wait_comp_err\n", 1978bdf20e72SSagi Grimberg isert_conn); 1979bdf20e72SSagi Grimberg complete(&isert_conn->conn_wait_comp_err); 1980ed4520aeSNicholas Bellinger } else if (is_isert_tx_desc(isert_conn, (void *)(uintptr_t)wc->wr_id)) { 1981b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1982df43debdSSagi Grimberg struct isert_cmd *isert_cmd; 19836f0fae3dSSagi Grimberg struct iser_tx_desc *desc; 1984b8d26b3bSNicholas Bellinger 19856f0fae3dSSagi Grimberg desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; 19866f0fae3dSSagi Grimberg isert_cmd = desc->isert_cmd; 1987b8d26b3bSNicholas Bellinger if (!isert_cmd) 1988df43debdSSagi Grimberg isert_unmap_tx_desc(desc, ib_dev); 1989b8d26b3bSNicholas Bellinger else 1990df43debdSSagi Grimberg isert_completion_put(desc, isert_cmd, ib_dev, true); 1991df43debdSSagi Grimberg } else { 1992df43debdSSagi Grimberg isert_conn->post_recv_buf_count--; 1993bdf20e72SSagi Grimberg if (!isert_conn->post_recv_buf_count) 19949d49f5e2SSagi Grimberg iscsit_cause_connection_reinstatement(isert_conn->conn, 0); 1995b8d26b3bSNicholas Bellinger } 1996df43debdSSagi Grimberg } 1997b8d26b3bSNicholas Bellinger 1998b8d26b3bSNicholas Bellinger static void 19996f0fae3dSSagi Grimberg isert_handle_wc(struct ib_wc *wc) 2000b8d26b3bSNicholas Bellinger { 2001b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 2002b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc; 20036f0fae3dSSagi Grimberg struct iser_rx_desc *rx_desc; 2004b8d26b3bSNicholas Bellinger 20056f0fae3dSSagi Grimberg isert_conn = wc->qp->qp_context; 20066f0fae3dSSagi Grimberg if (likely(wc->status == IB_WC_SUCCESS)) { 20076f0fae3dSSagi Grimberg if (wc->opcode == IB_WC_RECV) { 20086f0fae3dSSagi Grimberg rx_desc = (struct iser_rx_desc *)(uintptr_t)wc->wr_id; 20096f0fae3dSSagi Grimberg isert_rx_completion(rx_desc, isert_conn, wc->byte_len); 2010b8d26b3bSNicholas Bellinger } else { 20116f0fae3dSSagi Grimberg tx_desc = (struct iser_tx_desc *)(uintptr_t)wc->wr_id; 20126f0fae3dSSagi Grimberg isert_send_completion(tx_desc, isert_conn); 2013b8d26b3bSNicholas Bellinger } 20146f0fae3dSSagi Grimberg } else { 20156f0fae3dSSagi Grimberg if (wc->status != IB_WC_WR_FLUSH_ERR) 201624f412ddSSagi Grimberg isert_err("wr id %llx status %d vend_err %x\n", 20176f0fae3dSSagi Grimberg wc->wr_id, wc->status, wc->vendor_err); 20186f0fae3dSSagi Grimberg else 201924f412ddSSagi Grimberg isert_dbg("flush error: wr id %llx\n", wc->wr_id); 2020b8d26b3bSNicholas Bellinger 20216f0fae3dSSagi Grimberg if (wc->wr_id != ISER_FASTREG_LI_WRID) 20226f0fae3dSSagi Grimberg isert_cq_comp_err(isert_conn, wc); 20236f0fae3dSSagi Grimberg } 2024b8d26b3bSNicholas Bellinger } 2025b8d26b3bSNicholas Bellinger 2026b8d26b3bSNicholas Bellinger static void 20276f0fae3dSSagi Grimberg isert_cq_work(struct work_struct *work) 2028b8d26b3bSNicholas Bellinger { 202937d9fe80SSagi Grimberg enum { isert_poll_budget = 65536 }; 20304a295baeSSagi Grimberg struct isert_comp *comp = container_of(work, struct isert_comp, 20316f0fae3dSSagi Grimberg work); 203236ea63b5SSagi Grimberg struct ib_wc *const wcs = comp->wcs; 203336ea63b5SSagi Grimberg int i, n, completed = 0; 2034b8d26b3bSNicholas Bellinger 203536ea63b5SSagi Grimberg while ((n = ib_poll_cq(comp->cq, ARRAY_SIZE(comp->wcs), wcs)) > 0) { 203636ea63b5SSagi Grimberg for (i = 0; i < n; i++) 203736ea63b5SSagi Grimberg isert_handle_wc(&wcs[i]); 2038b8d26b3bSNicholas Bellinger 203936ea63b5SSagi Grimberg completed += n; 204036ea63b5SSagi Grimberg if (completed >= isert_poll_budget) 204137d9fe80SSagi Grimberg break; 204237d9fe80SSagi Grimberg } 204337d9fe80SSagi Grimberg 20446f0fae3dSSagi Grimberg ib_req_notify_cq(comp->cq, IB_CQ_NEXT_COMP); 2045b8d26b3bSNicholas Bellinger } 2046b8d26b3bSNicholas Bellinger 2047b8d26b3bSNicholas Bellinger static void 20486f0fae3dSSagi Grimberg isert_cq_callback(struct ib_cq *cq, void *context) 2049b8d26b3bSNicholas Bellinger { 20504a295baeSSagi Grimberg struct isert_comp *comp = context; 2051b8d26b3bSNicholas Bellinger 20526f0fae3dSSagi Grimberg queue_work(isert_comp_wq, &comp->work); 2053b8d26b3bSNicholas Bellinger } 2054b8d26b3bSNicholas Bellinger 2055b8d26b3bSNicholas Bellinger static int 2056b8d26b3bSNicholas Bellinger isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) 2057b8d26b3bSNicholas Bellinger { 2058b8d26b3bSNicholas Bellinger struct ib_send_wr *wr_failed; 2059b8d26b3bSNicholas Bellinger int ret; 2060b8d26b3bSNicholas Bellinger 2061b8d26b3bSNicholas Bellinger ret = ib_post_send(isert_conn->conn_qp, &isert_cmd->tx_desc.send_wr, 2062b8d26b3bSNicholas Bellinger &wr_failed); 2063b8d26b3bSNicholas Bellinger if (ret) { 206424f412ddSSagi Grimberg isert_err("ib_post_send failed with %d\n", ret); 2065b8d26b3bSNicholas Bellinger return ret; 2066b8d26b3bSNicholas Bellinger } 2067b8d26b3bSNicholas Bellinger return ret; 2068b8d26b3bSNicholas Bellinger } 2069b8d26b3bSNicholas Bellinger 2070b8d26b3bSNicholas Bellinger static int 2071b8d26b3bSNicholas Bellinger isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) 2072b8d26b3bSNicholas Bellinger { 2073d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2074b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2075b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2076b8d26b3bSNicholas Bellinger struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) 2077b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header; 2078b8d26b3bSNicholas Bellinger 2079b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2080b8d26b3bSNicholas Bellinger iscsit_build_rsp_pdu(cmd, conn, true, hdr); 2081b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 2082b8d26b3bSNicholas Bellinger /* 2083b8d26b3bSNicholas Bellinger * Attach SENSE DATA payload to iSCSI Response PDU 2084b8d26b3bSNicholas Bellinger */ 2085b8d26b3bSNicholas Bellinger if (cmd->se_cmd.sense_buffer && 2086b8d26b3bSNicholas Bellinger ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 2087b8d26b3bSNicholas Bellinger (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 2088b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2089b8d26b3bSNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 2090dbbc5d11SNicholas Bellinger u32 padding, pdu_len; 2091b8d26b3bSNicholas Bellinger 2092b8d26b3bSNicholas Bellinger put_unaligned_be16(cmd->se_cmd.scsi_sense_length, 2093b8d26b3bSNicholas Bellinger cmd->sense_buffer); 2094b8d26b3bSNicholas Bellinger cmd->se_cmd.scsi_sense_length += sizeof(__be16); 2095b8d26b3bSNicholas Bellinger 2096b8d26b3bSNicholas Bellinger padding = -(cmd->se_cmd.scsi_sense_length) & 3; 2097b8d26b3bSNicholas Bellinger hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); 2098dbbc5d11SNicholas Bellinger pdu_len = cmd->se_cmd.scsi_sense_length + padding; 2099b8d26b3bSNicholas Bellinger 2100dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 2101dbbc5d11SNicholas Bellinger (void *)cmd->sense_buffer, pdu_len, 2102b8d26b3bSNicholas Bellinger DMA_TO_DEVICE); 2103b8d26b3bSNicholas Bellinger 2104dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len = pdu_len; 2105dbbc5d11SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 2106dbbc5d11SNicholas Bellinger tx_dsg->length = pdu_len; 2107b8d26b3bSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 2108b8d26b3bSNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 2109b8d26b3bSNicholas Bellinger } 2110b8d26b3bSNicholas Bellinger 211168a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2112b8d26b3bSNicholas Bellinger 21134c22e07fSSagi Grimberg isert_dbg("Posting SCSI Response\n"); 2114b8d26b3bSNicholas Bellinger 2115b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2116b8d26b3bSNicholas Bellinger } 2117b8d26b3bSNicholas Bellinger 2118131e6abcSNicholas Bellinger static void 2119131e6abcSNicholas Bellinger isert_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd) 2120131e6abcSNicholas Bellinger { 2121131e6abcSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2122131e6abcSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2123131e6abcSNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 2124131e6abcSNicholas Bellinger 2125131e6abcSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 2126131e6abcSNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 2127131e6abcSNicholas Bellinger list_del_init(&cmd->i_conn_node); 2128131e6abcSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 2129131e6abcSNicholas Bellinger 2130131e6abcSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) 2131131e6abcSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 2132131e6abcSNicholas Bellinger 2133131e6abcSNicholas Bellinger device->unreg_rdma_mem(isert_cmd, isert_conn); 2134131e6abcSNicholas Bellinger } 2135131e6abcSNicholas Bellinger 2136e70beee7SNicholas Bellinger static enum target_prot_op 2137e70beee7SNicholas Bellinger isert_get_sup_prot_ops(struct iscsi_conn *conn) 2138e70beee7SNicholas Bellinger { 2139e70beee7SNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2140e70beee7SNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 2141e70beee7SNicholas Bellinger 214223a548eeSSagi Grimberg if (conn->tpg->tpg_attrib.t10_pi) { 214323a548eeSSagi Grimberg if (device->pi_capable) { 214424f412ddSSagi Grimberg isert_info("conn %p PI offload enabled\n", isert_conn); 214523a548eeSSagi Grimberg isert_conn->pi_support = true; 2146e70beee7SNicholas Bellinger return TARGET_PROT_ALL; 214723a548eeSSagi Grimberg } 214823a548eeSSagi Grimberg } 214923a548eeSSagi Grimberg 215024f412ddSSagi Grimberg isert_info("conn %p PI offload disabled\n", isert_conn); 215123a548eeSSagi Grimberg isert_conn->pi_support = false; 2152e70beee7SNicholas Bellinger 2153e70beee7SNicholas Bellinger return TARGET_PROT_NORMAL; 2154e70beee7SNicholas Bellinger } 2155e70beee7SNicholas Bellinger 2156b8d26b3bSNicholas Bellinger static int 2157b8d26b3bSNicholas Bellinger isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, 2158b8d26b3bSNicholas Bellinger bool nopout_response) 2159b8d26b3bSNicholas Bellinger { 2160d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2161b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2162b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2163b8d26b3bSNicholas Bellinger 2164b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2165b8d26b3bSNicholas Bellinger iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) 2166b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header, 2167b8d26b3bSNicholas Bellinger nopout_response); 2168b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 216968a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2170b8d26b3bSNicholas Bellinger 21714c22e07fSSagi Grimberg isert_dbg("conn %p Posting NOPIN Response\n", isert_conn); 2172b8d26b3bSNicholas Bellinger 2173b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2174b8d26b3bSNicholas Bellinger } 2175b8d26b3bSNicholas Bellinger 2176b8d26b3bSNicholas Bellinger static int 2177b8d26b3bSNicholas Bellinger isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2178b8d26b3bSNicholas Bellinger { 2179d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2180b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2181b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2182b8d26b3bSNicholas Bellinger 2183b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2184b8d26b3bSNicholas Bellinger iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) 2185b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2186b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 218768a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2188b8d26b3bSNicholas Bellinger 21894c22e07fSSagi Grimberg isert_dbg("conn %p Posting Logout Response\n", isert_conn); 2190b8d26b3bSNicholas Bellinger 2191b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2192b8d26b3bSNicholas Bellinger } 2193b8d26b3bSNicholas Bellinger 2194b8d26b3bSNicholas Bellinger static int 2195b8d26b3bSNicholas Bellinger isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2196b8d26b3bSNicholas Bellinger { 2197d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2198b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2199b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2200b8d26b3bSNicholas Bellinger 2201b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2202b8d26b3bSNicholas Bellinger iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) 2203b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2204b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 220568a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2206b8d26b3bSNicholas Bellinger 22074c22e07fSSagi Grimberg isert_dbg("conn %p Posting Task Management Response\n", isert_conn); 2208b8d26b3bSNicholas Bellinger 2209b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2210b8d26b3bSNicholas Bellinger } 2211b8d26b3bSNicholas Bellinger 2212b8d26b3bSNicholas Bellinger static int 2213b8d26b3bSNicholas Bellinger isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2214b8d26b3bSNicholas Bellinger { 2215d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2216b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2217b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 22183df8f68aSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 22193df8f68aSNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 22203df8f68aSNicholas Bellinger struct iscsi_reject *hdr = 22213df8f68aSNicholas Bellinger (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; 2222b8d26b3bSNicholas Bellinger 2223b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 22243df8f68aSNicholas Bellinger iscsit_build_reject(cmd, conn, hdr); 2225b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 22263df8f68aSNicholas Bellinger 22273df8f68aSNicholas Bellinger hton24(hdr->dlength, ISCSI_HDR_LEN); 2228dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 22293df8f68aSNicholas Bellinger (void *)cmd->buf_ptr, ISCSI_HDR_LEN, 22303df8f68aSNicholas Bellinger DMA_TO_DEVICE); 2231dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; 2232dbbc5d11SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 22333df8f68aSNicholas Bellinger tx_dsg->length = ISCSI_HDR_LEN; 22343df8f68aSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 22353df8f68aSNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 22363df8f68aSNicholas Bellinger 223768a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2238b8d26b3bSNicholas Bellinger 22394c22e07fSSagi Grimberg isert_dbg("conn %p Posting Reject\n", isert_conn); 2240b8d26b3bSNicholas Bellinger 2241b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2242b8d26b3bSNicholas Bellinger } 2243b8d26b3bSNicholas Bellinger 2244b8d26b3bSNicholas Bellinger static int 2245adb54c29SNicholas Bellinger isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2246adb54c29SNicholas Bellinger { 2247d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2248adb54c29SNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2249adb54c29SNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2250adb54c29SNicholas Bellinger struct iscsi_text_rsp *hdr = 2251adb54c29SNicholas Bellinger (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; 2252adb54c29SNicholas Bellinger u32 txt_rsp_len; 2253adb54c29SNicholas Bellinger int rc; 2254adb54c29SNicholas Bellinger 2255adb54c29SNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 225622c7aaa5SSagi Grimberg rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_INFINIBAND); 2257adb54c29SNicholas Bellinger if (rc < 0) 2258adb54c29SNicholas Bellinger return rc; 2259adb54c29SNicholas Bellinger 2260adb54c29SNicholas Bellinger txt_rsp_len = rc; 2261adb54c29SNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 2262adb54c29SNicholas Bellinger 2263adb54c29SNicholas Bellinger if (txt_rsp_len) { 2264adb54c29SNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2265adb54c29SNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 2266adb54c29SNicholas Bellinger void *txt_rsp_buf = cmd->buf_ptr; 2267adb54c29SNicholas Bellinger 2268adb54c29SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 2269adb54c29SNicholas Bellinger txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); 2270adb54c29SNicholas Bellinger 2271adb54c29SNicholas Bellinger isert_cmd->pdu_buf_len = txt_rsp_len; 2272adb54c29SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 2273adb54c29SNicholas Bellinger tx_dsg->length = txt_rsp_len; 2274adb54c29SNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 2275adb54c29SNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 2276adb54c29SNicholas Bellinger } 227768a86deeSSagi Grimberg isert_init_send_wr(isert_conn, isert_cmd, send_wr); 2278adb54c29SNicholas Bellinger 2279f64d2792SSagi Grimberg isert_dbg("conn %p Text Response\n", isert_conn); 2280adb54c29SNicholas Bellinger 2281adb54c29SNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2282adb54c29SNicholas Bellinger } 2283adb54c29SNicholas Bellinger 2284adb54c29SNicholas Bellinger static int 2285b8d26b3bSNicholas Bellinger isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 2286b8d26b3bSNicholas Bellinger struct ib_sge *ib_sge, struct ib_send_wr *send_wr, 2287b8d26b3bSNicholas Bellinger u32 data_left, u32 offset) 2288b8d26b3bSNicholas Bellinger { 2289d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 2290b8d26b3bSNicholas Bellinger struct scatterlist *sg_start, *tmp_sg; 2291b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2292b8d26b3bSNicholas Bellinger u32 sg_off, page_off; 2293b8d26b3bSNicholas Bellinger int i = 0, sg_nents; 2294b8d26b3bSNicholas Bellinger 2295b8d26b3bSNicholas Bellinger sg_off = offset / PAGE_SIZE; 2296b8d26b3bSNicholas Bellinger sg_start = &cmd->se_cmd.t_data_sg[sg_off]; 2297b8d26b3bSNicholas Bellinger sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); 2298b8d26b3bSNicholas Bellinger page_off = offset % PAGE_SIZE; 2299b8d26b3bSNicholas Bellinger 2300b8d26b3bSNicholas Bellinger send_wr->sg_list = ib_sge; 2301b8d26b3bSNicholas Bellinger send_wr->num_sge = sg_nents; 2302b0a191e7SSagi Grimberg send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; 2303b8d26b3bSNicholas Bellinger /* 2304b8d26b3bSNicholas Bellinger * Perform mapping of TCM scatterlist memory ib_sge dma_addr. 2305b8d26b3bSNicholas Bellinger */ 2306b8d26b3bSNicholas Bellinger for_each_sg(sg_start, tmp_sg, sg_nents, i) { 23074c22e07fSSagi Grimberg isert_dbg("RDMA from SGL dma_addr: 0x%llx dma_len: %u, " 23084c22e07fSSagi Grimberg "page_off: %u\n", 2309b8d26b3bSNicholas Bellinger (unsigned long long)tmp_sg->dma_address, 2310b8d26b3bSNicholas Bellinger tmp_sg->length, page_off); 2311b8d26b3bSNicholas Bellinger 2312b8d26b3bSNicholas Bellinger ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; 2313b8d26b3bSNicholas Bellinger ib_sge->length = min_t(u32, data_left, 2314b8d26b3bSNicholas Bellinger ib_sg_dma_len(ib_dev, tmp_sg) - page_off); 2315b8d26b3bSNicholas Bellinger ib_sge->lkey = isert_conn->conn_mr->lkey; 2316b8d26b3bSNicholas Bellinger 23174c22e07fSSagi Grimberg isert_dbg("RDMA ib_sge: addr: 0x%llx length: %u lkey: %x\n", 231890ecc6e2SVu Pham ib_sge->addr, ib_sge->length, ib_sge->lkey); 2319b8d26b3bSNicholas Bellinger page_off = 0; 2320b8d26b3bSNicholas Bellinger data_left -= ib_sge->length; 2321b8d26b3bSNicholas Bellinger ib_sge++; 232224f412ddSSagi Grimberg isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge); 2323b8d26b3bSNicholas Bellinger } 2324b8d26b3bSNicholas Bellinger 232524f412ddSSagi Grimberg isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", 2326b8d26b3bSNicholas Bellinger send_wr->sg_list, send_wr->num_sge); 2327b8d26b3bSNicholas Bellinger 2328b8d26b3bSNicholas Bellinger return sg_nents; 2329b8d26b3bSNicholas Bellinger } 2330b8d26b3bSNicholas Bellinger 2331b8d26b3bSNicholas Bellinger static int 233290ecc6e2SVu Pham isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 233390ecc6e2SVu Pham struct isert_rdma_wr *wr) 2334b8d26b3bSNicholas Bellinger { 2335b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 2336d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2337b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2338e3d7e4c3SSagi Grimberg struct isert_data_buf *data = &wr->data; 233990ecc6e2SVu Pham struct ib_send_wr *send_wr; 2340b8d26b3bSNicholas Bellinger struct ib_sge *ib_sge; 2341e3d7e4c3SSagi Grimberg u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; 2342e3d7e4c3SSagi Grimberg int ret = 0, i, ib_sge_cnt; 2343b8d26b3bSNicholas Bellinger 234490ecc6e2SVu Pham isert_cmd->tx_desc.isert_cmd = isert_cmd; 2345b8d26b3bSNicholas Bellinger 2346e3d7e4c3SSagi Grimberg offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; 2347e3d7e4c3SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, 2348e3d7e4c3SSagi Grimberg se_cmd->t_data_nents, se_cmd->data_length, 2349e3d7e4c3SSagi Grimberg offset, wr->iser_ib_op, &wr->data); 2350e3d7e4c3SSagi Grimberg if (ret) 2351e3d7e4c3SSagi Grimberg return ret; 2352b8d26b3bSNicholas Bellinger 2353e3d7e4c3SSagi Grimberg data_left = data->len; 2354e3d7e4c3SSagi Grimberg offset = data->offset; 2355b8d26b3bSNicholas Bellinger 2356e3d7e4c3SSagi Grimberg ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); 2357b8d26b3bSNicholas Bellinger if (!ib_sge) { 235824f412ddSSagi Grimberg isert_warn("Unable to allocate ib_sge\n"); 2359b8d26b3bSNicholas Bellinger ret = -ENOMEM; 2360e3d7e4c3SSagi Grimberg goto unmap_cmd; 2361b8d26b3bSNicholas Bellinger } 236290ecc6e2SVu Pham wr->ib_sge = ib_sge; 2363b8d26b3bSNicholas Bellinger 2364e3d7e4c3SSagi Grimberg wr->send_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); 2365b8d26b3bSNicholas Bellinger wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num, 2366b8d26b3bSNicholas Bellinger GFP_KERNEL); 2367b8d26b3bSNicholas Bellinger if (!wr->send_wr) { 236824f412ddSSagi Grimberg isert_dbg("Unable to allocate wr->send_wr\n"); 2369b8d26b3bSNicholas Bellinger ret = -ENOMEM; 2370e3d7e4c3SSagi Grimberg goto unmap_cmd; 2371b8d26b3bSNicholas Bellinger } 2372b8d26b3bSNicholas Bellinger 2373b8d26b3bSNicholas Bellinger wr->isert_cmd = isert_cmd; 2374b8d26b3bSNicholas Bellinger rdma_write_max = isert_conn->max_sge * PAGE_SIZE; 2375b8d26b3bSNicholas Bellinger 2376b8d26b3bSNicholas Bellinger for (i = 0; i < wr->send_wr_num; i++) { 2377b8d26b3bSNicholas Bellinger send_wr = &isert_cmd->rdma_wr.send_wr[i]; 2378b8d26b3bSNicholas Bellinger data_len = min(data_left, rdma_write_max); 2379b8d26b3bSNicholas Bellinger 2380b8d26b3bSNicholas Bellinger send_wr->send_flags = 0; 238190ecc6e2SVu Pham if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { 238290ecc6e2SVu Pham send_wr->opcode = IB_WR_RDMA_WRITE; 2383b8d26b3bSNicholas Bellinger send_wr->wr.rdma.remote_addr = isert_cmd->read_va + offset; 2384b8d26b3bSNicholas Bellinger send_wr->wr.rdma.rkey = isert_cmd->read_stag; 238590ecc6e2SVu Pham if (i + 1 == wr->send_wr_num) 238690ecc6e2SVu Pham send_wr->next = &isert_cmd->tx_desc.send_wr; 238790ecc6e2SVu Pham else 238890ecc6e2SVu Pham send_wr->next = &wr->send_wr[i + 1]; 238990ecc6e2SVu Pham } else { 239090ecc6e2SVu Pham send_wr->opcode = IB_WR_RDMA_READ; 239190ecc6e2SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->write_va + va_offset; 239290ecc6e2SVu Pham send_wr->wr.rdma.rkey = isert_cmd->write_stag; 239390ecc6e2SVu Pham if (i + 1 == wr->send_wr_num) 239490ecc6e2SVu Pham send_wr->send_flags = IB_SEND_SIGNALED; 239590ecc6e2SVu Pham else 239690ecc6e2SVu Pham send_wr->next = &wr->send_wr[i + 1]; 239790ecc6e2SVu Pham } 2398b8d26b3bSNicholas Bellinger 2399b8d26b3bSNicholas Bellinger ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, 2400b8d26b3bSNicholas Bellinger send_wr, data_len, offset); 2401b8d26b3bSNicholas Bellinger ib_sge += ib_sge_cnt; 2402b8d26b3bSNicholas Bellinger 2403b8d26b3bSNicholas Bellinger offset += data_len; 240490ecc6e2SVu Pham va_offset += data_len; 2405b8d26b3bSNicholas Bellinger data_left -= data_len; 2406b8d26b3bSNicholas Bellinger } 240790ecc6e2SVu Pham 240890ecc6e2SVu Pham return 0; 2409e3d7e4c3SSagi Grimberg unmap_cmd: 2410e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, data); 2411e3d7e4c3SSagi Grimberg 241290ecc6e2SVu Pham return ret; 241390ecc6e2SVu Pham } 241490ecc6e2SVu Pham 241590ecc6e2SVu Pham static int 241659464ef4SVu Pham isert_map_fr_pagelist(struct ib_device *ib_dev, 241759464ef4SVu Pham struct scatterlist *sg_start, int sg_nents, u64 *fr_pl) 241859464ef4SVu Pham { 241959464ef4SVu Pham u64 start_addr, end_addr, page, chunk_start = 0; 242059464ef4SVu Pham struct scatterlist *tmp_sg; 242159464ef4SVu Pham int i = 0, new_chunk, last_ent, n_pages; 242259464ef4SVu Pham 242359464ef4SVu Pham n_pages = 0; 242459464ef4SVu Pham new_chunk = 1; 242559464ef4SVu Pham last_ent = sg_nents - 1; 242659464ef4SVu Pham for_each_sg(sg_start, tmp_sg, sg_nents, i) { 242759464ef4SVu Pham start_addr = ib_sg_dma_address(ib_dev, tmp_sg); 242859464ef4SVu Pham if (new_chunk) 242959464ef4SVu Pham chunk_start = start_addr; 243059464ef4SVu Pham end_addr = start_addr + ib_sg_dma_len(ib_dev, tmp_sg); 243159464ef4SVu Pham 24324c22e07fSSagi Grimberg isert_dbg("SGL[%d] dma_addr: 0x%llx len: %u\n", 243359464ef4SVu Pham i, (unsigned long long)tmp_sg->dma_address, 243459464ef4SVu Pham tmp_sg->length); 243559464ef4SVu Pham 243659464ef4SVu Pham if ((end_addr & ~PAGE_MASK) && i < last_ent) { 243759464ef4SVu Pham new_chunk = 0; 243859464ef4SVu Pham continue; 243959464ef4SVu Pham } 244059464ef4SVu Pham new_chunk = 1; 244159464ef4SVu Pham 244259464ef4SVu Pham page = chunk_start & PAGE_MASK; 244359464ef4SVu Pham do { 244459464ef4SVu Pham fr_pl[n_pages++] = page; 24454c22e07fSSagi Grimberg isert_dbg("Mapped page_list[%d] page_addr: 0x%llx\n", 244659464ef4SVu Pham n_pages - 1, page); 244759464ef4SVu Pham page += PAGE_SIZE; 244859464ef4SVu Pham } while (page < end_addr); 244959464ef4SVu Pham } 245059464ef4SVu Pham 245159464ef4SVu Pham return n_pages; 245259464ef4SVu Pham } 245359464ef4SVu Pham 245410633c37SSagi Grimberg static inline void 245510633c37SSagi Grimberg isert_inv_rkey(struct ib_send_wr *inv_wr, struct ib_mr *mr) 245610633c37SSagi Grimberg { 245710633c37SSagi Grimberg u32 rkey; 245810633c37SSagi Grimberg 245910633c37SSagi Grimberg memset(inv_wr, 0, sizeof(*inv_wr)); 246010633c37SSagi Grimberg inv_wr->wr_id = ISER_FASTREG_LI_WRID; 246110633c37SSagi Grimberg inv_wr->opcode = IB_WR_LOCAL_INV; 246210633c37SSagi Grimberg inv_wr->ex.invalidate_rkey = mr->rkey; 246310633c37SSagi Grimberg 246410633c37SSagi Grimberg /* Bump the key */ 246510633c37SSagi Grimberg rkey = ib_inc_rkey(mr->rkey); 246610633c37SSagi Grimberg ib_update_fast_reg_key(mr, rkey); 246710633c37SSagi Grimberg } 246810633c37SSagi Grimberg 246959464ef4SVu Pham static int 2470e3d7e4c3SSagi Grimberg isert_fast_reg_mr(struct isert_conn *isert_conn, 2471e3d7e4c3SSagi Grimberg struct fast_reg_descriptor *fr_desc, 2472e3d7e4c3SSagi Grimberg struct isert_data_buf *mem, 24739e961ae7SSagi Grimberg enum isert_indicator ind, 2474e3d7e4c3SSagi Grimberg struct ib_sge *sge) 247559464ef4SVu Pham { 247659464ef4SVu Pham struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 24779e961ae7SSagi Grimberg struct ib_mr *mr; 24789e961ae7SSagi Grimberg struct ib_fast_reg_page_list *frpl; 247959464ef4SVu Pham struct ib_send_wr fr_wr, inv_wr; 248059464ef4SVu Pham struct ib_send_wr *bad_wr, *wr = NULL; 24819bd626e7SSagi Grimberg int ret, pagelist_len; 24829bd626e7SSagi Grimberg u32 page_off; 248359464ef4SVu Pham 2484e3d7e4c3SSagi Grimberg if (mem->dma_nents == 1) { 2485e3d7e4c3SSagi Grimberg sge->lkey = isert_conn->conn_mr->lkey; 2486e3d7e4c3SSagi Grimberg sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); 2487e3d7e4c3SSagi Grimberg sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); 24884c22e07fSSagi Grimberg isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", 24894c22e07fSSagi Grimberg sge->addr, sge->length, sge->lkey); 2490e3d7e4c3SSagi Grimberg return 0; 2491e3d7e4c3SSagi Grimberg } 2492e3d7e4c3SSagi Grimberg 24939e961ae7SSagi Grimberg if (ind == ISERT_DATA_KEY_VALID) { 24949e961ae7SSagi Grimberg /* Registering data buffer */ 24959e961ae7SSagi Grimberg mr = fr_desc->data_mr; 24969e961ae7SSagi Grimberg frpl = fr_desc->data_frpl; 24979e961ae7SSagi Grimberg } else { 24989e961ae7SSagi Grimberg /* Registering protection buffer */ 24999e961ae7SSagi Grimberg mr = fr_desc->pi_ctx->prot_mr; 25009e961ae7SSagi Grimberg frpl = fr_desc->pi_ctx->prot_frpl; 25019e961ae7SSagi Grimberg } 25029e961ae7SSagi Grimberg 2503e3d7e4c3SSagi Grimberg page_off = mem->offset % PAGE_SIZE; 250459464ef4SVu Pham 250524f412ddSSagi Grimberg isert_dbg("Use fr_desc %p sg_nents %d offset %u\n", 2506e3d7e4c3SSagi Grimberg fr_desc, mem->nents, mem->offset); 250759464ef4SVu Pham 2508e3d7e4c3SSagi Grimberg pagelist_len = isert_map_fr_pagelist(ib_dev, mem->sg, mem->nents, 25099e961ae7SSagi Grimberg &frpl->page_list[0]); 251059464ef4SVu Pham 251110633c37SSagi Grimberg if (!(fr_desc->ind & ind)) { 251210633c37SSagi Grimberg isert_inv_rkey(&inv_wr, mr); 251359464ef4SVu Pham wr = &inv_wr; 251459464ef4SVu Pham } 251559464ef4SVu Pham 251659464ef4SVu Pham /* Prepare FASTREG WR */ 251759464ef4SVu Pham memset(&fr_wr, 0, sizeof(fr_wr)); 25189bb4ca68SNicholas Bellinger fr_wr.wr_id = ISER_FASTREG_LI_WRID; 251959464ef4SVu Pham fr_wr.opcode = IB_WR_FAST_REG_MR; 25209e961ae7SSagi Grimberg fr_wr.wr.fast_reg.iova_start = frpl->page_list[0] + page_off; 25219e961ae7SSagi Grimberg fr_wr.wr.fast_reg.page_list = frpl; 252259464ef4SVu Pham fr_wr.wr.fast_reg.page_list_len = pagelist_len; 252359464ef4SVu Pham fr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; 2524e3d7e4c3SSagi Grimberg fr_wr.wr.fast_reg.length = mem->len; 25259e961ae7SSagi Grimberg fr_wr.wr.fast_reg.rkey = mr->rkey; 252659464ef4SVu Pham fr_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE; 252759464ef4SVu Pham 252859464ef4SVu Pham if (!wr) 252959464ef4SVu Pham wr = &fr_wr; 253059464ef4SVu Pham else 253159464ef4SVu Pham wr->next = &fr_wr; 253259464ef4SVu Pham 253359464ef4SVu Pham ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr); 253459464ef4SVu Pham if (ret) { 253524f412ddSSagi Grimberg isert_err("fast registration failed, ret:%d\n", ret); 253659464ef4SVu Pham return ret; 253759464ef4SVu Pham } 25389e961ae7SSagi Grimberg fr_desc->ind &= ~ind; 253959464ef4SVu Pham 25409e961ae7SSagi Grimberg sge->lkey = mr->lkey; 25419e961ae7SSagi Grimberg sge->addr = frpl->page_list[0] + page_off; 2542e3d7e4c3SSagi Grimberg sge->length = mem->len; 254359464ef4SVu Pham 25444c22e07fSSagi Grimberg isert_dbg("sge: addr: 0x%llx length: %u lkey: %x\n", 25454c22e07fSSagi Grimberg sge->addr, sge->length, sge->lkey); 254659464ef4SVu Pham 254759464ef4SVu Pham return ret; 254859464ef4SVu Pham } 254959464ef4SVu Pham 25503d73cf1aSSagi Grimberg static inline void 25513d73cf1aSSagi Grimberg isert_set_dif_domain(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs, 25523d73cf1aSSagi Grimberg struct ib_sig_domain *domain) 25539e961ae7SSagi Grimberg { 255478eda2bbSSagi Grimberg domain->sig_type = IB_SIG_TYPE_T10_DIF; 25553d73cf1aSSagi Grimberg domain->sig.dif.bg_type = IB_T10DIF_CRC; 25563d73cf1aSSagi Grimberg domain->sig.dif.pi_interval = se_cmd->se_dev->dev_attrib.block_size; 25573d73cf1aSSagi Grimberg domain->sig.dif.ref_tag = se_cmd->reftag_seed; 255878eda2bbSSagi Grimberg /* 255978eda2bbSSagi Grimberg * At the moment we hard code those, but if in the future 256078eda2bbSSagi Grimberg * the target core would like to use it, we will take it 256178eda2bbSSagi Grimberg * from se_cmd. 256278eda2bbSSagi Grimberg */ 256378eda2bbSSagi Grimberg domain->sig.dif.apptag_check_mask = 0xffff; 256478eda2bbSSagi Grimberg domain->sig.dif.app_escape = true; 256578eda2bbSSagi Grimberg domain->sig.dif.ref_escape = true; 256678eda2bbSSagi Grimberg if (se_cmd->prot_type == TARGET_DIF_TYPE1_PROT || 256778eda2bbSSagi Grimberg se_cmd->prot_type == TARGET_DIF_TYPE2_PROT) 256878eda2bbSSagi Grimberg domain->sig.dif.ref_remap = true; 25693d73cf1aSSagi Grimberg }; 25703d73cf1aSSagi Grimberg 25713d73cf1aSSagi Grimberg static int 25723d73cf1aSSagi Grimberg isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) 25733d73cf1aSSagi Grimberg { 25749e961ae7SSagi Grimberg switch (se_cmd->prot_op) { 25759e961ae7SSagi Grimberg case TARGET_PROT_DIN_INSERT: 25769e961ae7SSagi Grimberg case TARGET_PROT_DOUT_STRIP: 257778eda2bbSSagi Grimberg sig_attrs->mem.sig_type = IB_SIG_TYPE_NONE; 25783d73cf1aSSagi Grimberg isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); 25799e961ae7SSagi Grimberg break; 25809e961ae7SSagi Grimberg case TARGET_PROT_DOUT_INSERT: 25819e961ae7SSagi Grimberg case TARGET_PROT_DIN_STRIP: 258278eda2bbSSagi Grimberg sig_attrs->wire.sig_type = IB_SIG_TYPE_NONE; 25833d73cf1aSSagi Grimberg isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); 25849e961ae7SSagi Grimberg break; 25859e961ae7SSagi Grimberg case TARGET_PROT_DIN_PASS: 25869e961ae7SSagi Grimberg case TARGET_PROT_DOUT_PASS: 25873d73cf1aSSagi Grimberg isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->wire); 25883d73cf1aSSagi Grimberg isert_set_dif_domain(se_cmd, sig_attrs, &sig_attrs->mem); 25899e961ae7SSagi Grimberg break; 25909e961ae7SSagi Grimberg default: 259124f412ddSSagi Grimberg isert_err("Unsupported PI operation %d\n", se_cmd->prot_op); 25929e961ae7SSagi Grimberg return -EINVAL; 25939e961ae7SSagi Grimberg } 25949e961ae7SSagi Grimberg 25959e961ae7SSagi Grimberg return 0; 25969e961ae7SSagi Grimberg } 25979e961ae7SSagi Grimberg 25989e961ae7SSagi Grimberg static inline u8 25999e961ae7SSagi Grimberg isert_set_prot_checks(u8 prot_checks) 26009e961ae7SSagi Grimberg { 26019e961ae7SSagi Grimberg return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | 26029e961ae7SSagi Grimberg (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | 26039e961ae7SSagi Grimberg (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); 26049e961ae7SSagi Grimberg } 26059e961ae7SSagi Grimberg 26069e961ae7SSagi Grimberg static int 2607570db170SSagi Grimberg isert_reg_sig_mr(struct isert_conn *isert_conn, 2608570db170SSagi Grimberg struct se_cmd *se_cmd, 2609570db170SSagi Grimberg struct isert_rdma_wr *rdma_wr, 2610570db170SSagi Grimberg struct fast_reg_descriptor *fr_desc) 26119e961ae7SSagi Grimberg { 26129e961ae7SSagi Grimberg struct ib_send_wr sig_wr, inv_wr; 26139e961ae7SSagi Grimberg struct ib_send_wr *bad_wr, *wr = NULL; 26149e961ae7SSagi Grimberg struct pi_context *pi_ctx = fr_desc->pi_ctx; 26159e961ae7SSagi Grimberg struct ib_sig_attrs sig_attrs; 26169e961ae7SSagi Grimberg int ret; 26179e961ae7SSagi Grimberg 26189e961ae7SSagi Grimberg memset(&sig_attrs, 0, sizeof(sig_attrs)); 26199e961ae7SSagi Grimberg ret = isert_set_sig_attrs(se_cmd, &sig_attrs); 26209e961ae7SSagi Grimberg if (ret) 26219e961ae7SSagi Grimberg goto err; 26229e961ae7SSagi Grimberg 26239e961ae7SSagi Grimberg sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); 26249e961ae7SSagi Grimberg 26259e961ae7SSagi Grimberg if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { 262610633c37SSagi Grimberg isert_inv_rkey(&inv_wr, pi_ctx->sig_mr); 26279e961ae7SSagi Grimberg wr = &inv_wr; 26289e961ae7SSagi Grimberg } 26299e961ae7SSagi Grimberg 26309e961ae7SSagi Grimberg memset(&sig_wr, 0, sizeof(sig_wr)); 26319e961ae7SSagi Grimberg sig_wr.opcode = IB_WR_REG_SIG_MR; 2632c2caa207SSagi Grimberg sig_wr.wr_id = ISER_FASTREG_LI_WRID; 2633570db170SSagi Grimberg sig_wr.sg_list = &rdma_wr->ib_sg[DATA]; 26349e961ae7SSagi Grimberg sig_wr.num_sge = 1; 26359e961ae7SSagi Grimberg sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE; 26369e961ae7SSagi Grimberg sig_wr.wr.sig_handover.sig_attrs = &sig_attrs; 26379e961ae7SSagi Grimberg sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr; 26389e961ae7SSagi Grimberg if (se_cmd->t_prot_sg) 2639570db170SSagi Grimberg sig_wr.wr.sig_handover.prot = &rdma_wr->ib_sg[PROT]; 26409e961ae7SSagi Grimberg 26419e961ae7SSagi Grimberg if (!wr) 26429e961ae7SSagi Grimberg wr = &sig_wr; 26439e961ae7SSagi Grimberg else 26449e961ae7SSagi Grimberg wr->next = &sig_wr; 26459e961ae7SSagi Grimberg 26469e961ae7SSagi Grimberg ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr); 26479e961ae7SSagi Grimberg if (ret) { 264824f412ddSSagi Grimberg isert_err("fast registration failed, ret:%d\n", ret); 26499e961ae7SSagi Grimberg goto err; 26509e961ae7SSagi Grimberg } 26519e961ae7SSagi Grimberg fr_desc->ind &= ~ISERT_SIG_KEY_VALID; 26529e961ae7SSagi Grimberg 2653570db170SSagi Grimberg rdma_wr->ib_sg[SIG].lkey = pi_ctx->sig_mr->lkey; 2654570db170SSagi Grimberg rdma_wr->ib_sg[SIG].addr = 0; 2655570db170SSagi Grimberg rdma_wr->ib_sg[SIG].length = se_cmd->data_length; 26569e961ae7SSagi Grimberg if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && 26579e961ae7SSagi Grimberg se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) 26589e961ae7SSagi Grimberg /* 26599e961ae7SSagi Grimberg * We have protection guards on the wire 26609e961ae7SSagi Grimberg * so we need to set a larget transfer 26619e961ae7SSagi Grimberg */ 2662570db170SSagi Grimberg rdma_wr->ib_sg[SIG].length += se_cmd->prot_length; 26639e961ae7SSagi Grimberg 266424f412ddSSagi Grimberg isert_dbg("sig_sge: addr: 0x%llx length: %u lkey: %x\n", 2665570db170SSagi Grimberg rdma_wr->ib_sg[SIG].addr, rdma_wr->ib_sg[SIG].length, 2666570db170SSagi Grimberg rdma_wr->ib_sg[SIG].lkey); 26679e961ae7SSagi Grimberg err: 26689e961ae7SSagi Grimberg return ret; 26699e961ae7SSagi Grimberg } 26709e961ae7SSagi Grimberg 267159464ef4SVu Pham static int 2672570db170SSagi Grimberg isert_handle_prot_cmd(struct isert_conn *isert_conn, 2673570db170SSagi Grimberg struct isert_cmd *isert_cmd, 2674570db170SSagi Grimberg struct isert_rdma_wr *wr) 2675570db170SSagi Grimberg { 2676570db170SSagi Grimberg struct isert_device *device = isert_conn->conn_device; 2677570db170SSagi Grimberg struct se_cmd *se_cmd = &isert_cmd->iscsi_cmd->se_cmd; 2678570db170SSagi Grimberg int ret; 2679570db170SSagi Grimberg 2680570db170SSagi Grimberg if (!wr->fr_desc->pi_ctx) { 2681570db170SSagi Grimberg ret = isert_create_pi_ctx(wr->fr_desc, 2682570db170SSagi Grimberg device->ib_device, 2683570db170SSagi Grimberg isert_conn->conn_pd); 2684570db170SSagi Grimberg if (ret) { 268524f412ddSSagi Grimberg isert_err("conn %p failed to allocate pi_ctx\n", 2686570db170SSagi Grimberg isert_conn); 2687570db170SSagi Grimberg return ret; 2688570db170SSagi Grimberg } 2689570db170SSagi Grimberg } 2690570db170SSagi Grimberg 2691570db170SSagi Grimberg if (se_cmd->t_prot_sg) { 2692570db170SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, 2693570db170SSagi Grimberg se_cmd->t_prot_sg, 2694570db170SSagi Grimberg se_cmd->t_prot_nents, 2695570db170SSagi Grimberg se_cmd->prot_length, 2696570db170SSagi Grimberg 0, wr->iser_ib_op, &wr->prot); 2697570db170SSagi Grimberg if (ret) { 269824f412ddSSagi Grimberg isert_err("conn %p failed to map protection buffer\n", 2699570db170SSagi Grimberg isert_conn); 2700570db170SSagi Grimberg return ret; 2701570db170SSagi Grimberg } 2702570db170SSagi Grimberg 2703570db170SSagi Grimberg memset(&wr->ib_sg[PROT], 0, sizeof(wr->ib_sg[PROT])); 2704570db170SSagi Grimberg ret = isert_fast_reg_mr(isert_conn, wr->fr_desc, &wr->prot, 2705570db170SSagi Grimberg ISERT_PROT_KEY_VALID, &wr->ib_sg[PROT]); 2706570db170SSagi Grimberg if (ret) { 270724f412ddSSagi Grimberg isert_err("conn %p failed to fast reg mr\n", 2708570db170SSagi Grimberg isert_conn); 2709570db170SSagi Grimberg goto unmap_prot_cmd; 2710570db170SSagi Grimberg } 2711570db170SSagi Grimberg } 2712570db170SSagi Grimberg 2713570db170SSagi Grimberg ret = isert_reg_sig_mr(isert_conn, se_cmd, wr, wr->fr_desc); 2714570db170SSagi Grimberg if (ret) { 271524f412ddSSagi Grimberg isert_err("conn %p failed to fast reg mr\n", 2716570db170SSagi Grimberg isert_conn); 2717570db170SSagi Grimberg goto unmap_prot_cmd; 2718570db170SSagi Grimberg } 2719570db170SSagi Grimberg wr->fr_desc->ind |= ISERT_PROTECTED; 2720570db170SSagi Grimberg 2721570db170SSagi Grimberg return 0; 2722570db170SSagi Grimberg 2723570db170SSagi Grimberg unmap_prot_cmd: 2724570db170SSagi Grimberg if (se_cmd->t_prot_sg) 2725570db170SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->prot); 2726570db170SSagi Grimberg 2727570db170SSagi Grimberg return ret; 2728570db170SSagi Grimberg } 2729570db170SSagi Grimberg 2730570db170SSagi Grimberg static int 2731a3a5a826SSagi Grimberg isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 273259464ef4SVu Pham struct isert_rdma_wr *wr) 273359464ef4SVu Pham { 273459464ef4SVu Pham struct se_cmd *se_cmd = &cmd->se_cmd; 273559464ef4SVu Pham struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2736e3d7e4c3SSagi Grimberg struct isert_conn *isert_conn = conn->context; 2737e3d7e4c3SSagi Grimberg struct fast_reg_descriptor *fr_desc = NULL; 2738570db170SSagi Grimberg struct ib_send_wr *send_wr; 2739570db170SSagi Grimberg struct ib_sge *ib_sg; 2740e3d7e4c3SSagi Grimberg u32 offset; 2741e3d7e4c3SSagi Grimberg int ret = 0; 274259464ef4SVu Pham unsigned long flags; 274359464ef4SVu Pham 274459464ef4SVu Pham isert_cmd->tx_desc.isert_cmd = isert_cmd; 2745e3d7e4c3SSagi Grimberg 2746e3d7e4c3SSagi Grimberg offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; 2747e3d7e4c3SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, 2748e3d7e4c3SSagi Grimberg se_cmd->t_data_nents, se_cmd->data_length, 2749e3d7e4c3SSagi Grimberg offset, wr->iser_ib_op, &wr->data); 2750e3d7e4c3SSagi Grimberg if (ret) 2751e3d7e4c3SSagi Grimberg return ret; 2752e3d7e4c3SSagi Grimberg 2753302cc7c3SSagi Grimberg if (wr->data.dma_nents != 1 || isert_prot_cmd(isert_conn, se_cmd)) { 2754e3d7e4c3SSagi Grimberg spin_lock_irqsave(&isert_conn->conn_lock, flags); 2755e3d7e4c3SSagi Grimberg fr_desc = list_first_entry(&isert_conn->conn_fr_pool, 2756e3d7e4c3SSagi Grimberg struct fast_reg_descriptor, list); 2757e3d7e4c3SSagi Grimberg list_del(&fr_desc->list); 2758e3d7e4c3SSagi Grimberg spin_unlock_irqrestore(&isert_conn->conn_lock, flags); 2759e3d7e4c3SSagi Grimberg wr->fr_desc = fr_desc; 276059464ef4SVu Pham } 276159464ef4SVu Pham 27629e961ae7SSagi Grimberg ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, 2763570db170SSagi Grimberg ISERT_DATA_KEY_VALID, &wr->ib_sg[DATA]); 2764e3d7e4c3SSagi Grimberg if (ret) 2765e3d7e4c3SSagi Grimberg goto unmap_cmd; 276659464ef4SVu Pham 2767302cc7c3SSagi Grimberg if (isert_prot_cmd(isert_conn, se_cmd)) { 2768570db170SSagi Grimberg ret = isert_handle_prot_cmd(isert_conn, isert_cmd, wr); 27699e961ae7SSagi Grimberg if (ret) 27709e961ae7SSagi Grimberg goto unmap_cmd; 27719e961ae7SSagi Grimberg 2772570db170SSagi Grimberg ib_sg = &wr->ib_sg[SIG]; 2773570db170SSagi Grimberg } else { 2774570db170SSagi Grimberg ib_sg = &wr->ib_sg[DATA]; 27759e961ae7SSagi Grimberg } 27769e961ae7SSagi Grimberg 2777570db170SSagi Grimberg memcpy(&wr->s_ib_sge, ib_sg, sizeof(*ib_sg)); 2778e3d7e4c3SSagi Grimberg wr->ib_sge = &wr->s_ib_sge; 277959464ef4SVu Pham wr->send_wr_num = 1; 278059464ef4SVu Pham memset(&wr->s_send_wr, 0, sizeof(*send_wr)); 278159464ef4SVu Pham wr->send_wr = &wr->s_send_wr; 278259464ef4SVu Pham wr->isert_cmd = isert_cmd; 278359464ef4SVu Pham 278459464ef4SVu Pham send_wr = &isert_cmd->rdma_wr.s_send_wr; 2785e3d7e4c3SSagi Grimberg send_wr->sg_list = &wr->s_ib_sge; 278659464ef4SVu Pham send_wr->num_sge = 1; 2787b0a191e7SSagi Grimberg send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc; 278859464ef4SVu Pham if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { 278959464ef4SVu Pham send_wr->opcode = IB_WR_RDMA_WRITE; 279059464ef4SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->read_va; 279159464ef4SVu Pham send_wr->wr.rdma.rkey = isert_cmd->read_stag; 2792302cc7c3SSagi Grimberg send_wr->send_flags = !isert_prot_cmd(isert_conn, se_cmd) ? 27939e961ae7SSagi Grimberg 0 : IB_SEND_SIGNALED; 279459464ef4SVu Pham } else { 279559464ef4SVu Pham send_wr->opcode = IB_WR_RDMA_READ; 279659464ef4SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->write_va; 279759464ef4SVu Pham send_wr->wr.rdma.rkey = isert_cmd->write_stag; 279859464ef4SVu Pham send_wr->send_flags = IB_SEND_SIGNALED; 279959464ef4SVu Pham } 280059464ef4SVu Pham 280159464ef4SVu Pham return 0; 2802570db170SSagi Grimberg 2803e3d7e4c3SSagi Grimberg unmap_cmd: 2804e3d7e4c3SSagi Grimberg if (fr_desc) { 2805e3d7e4c3SSagi Grimberg spin_lock_irqsave(&isert_conn->conn_lock, flags); 2806e3d7e4c3SSagi Grimberg list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); 2807e3d7e4c3SSagi Grimberg spin_unlock_irqrestore(&isert_conn->conn_lock, flags); 2808e3d7e4c3SSagi Grimberg } 2809e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 281059464ef4SVu Pham 281159464ef4SVu Pham return ret; 281259464ef4SVu Pham } 281359464ef4SVu Pham 281459464ef4SVu Pham static int 281590ecc6e2SVu Pham isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) 281690ecc6e2SVu Pham { 281790ecc6e2SVu Pham struct se_cmd *se_cmd = &cmd->se_cmd; 281859464ef4SVu Pham struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 281990ecc6e2SVu Pham struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 282090ecc6e2SVu Pham struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2821d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 282290ecc6e2SVu Pham struct ib_send_wr *wr_failed; 282390ecc6e2SVu Pham int rc; 282490ecc6e2SVu Pham 282524f412ddSSagi Grimberg isert_dbg("Cmd: %p RDMA_WRITE data_length: %u\n", 282690ecc6e2SVu Pham isert_cmd, se_cmd->data_length); 28274c22e07fSSagi Grimberg 282890ecc6e2SVu Pham wr->iser_ib_op = ISER_IB_RDMA_WRITE; 2829d40945d8SVu Pham rc = device->reg_rdma_mem(conn, cmd, wr); 283090ecc6e2SVu Pham if (rc) { 283124f412ddSSagi Grimberg isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); 283290ecc6e2SVu Pham return rc; 283390ecc6e2SVu Pham } 283490ecc6e2SVu Pham 2835302cc7c3SSagi Grimberg if (!isert_prot_cmd(isert_conn, se_cmd)) { 2836b8d26b3bSNicholas Bellinger /* 2837b8d26b3bSNicholas Bellinger * Build isert_conn->tx_desc for iSCSI response PDU and attach 2838b8d26b3bSNicholas Bellinger */ 28399e961ae7SSagi Grimberg isert_create_send_desc(isert_conn, isert_cmd, 28409e961ae7SSagi Grimberg &isert_cmd->tx_desc); 284104d9cd12SNicholas Bellinger iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) 2842b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2843b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 284495b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, 284568a86deeSSagi Grimberg &isert_cmd->tx_desc.send_wr); 28469e961ae7SSagi Grimberg isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr; 2847897bb2c9SSagi Grimberg wr->send_wr_num += 1; 28489e961ae7SSagi Grimberg } 2849b8d26b3bSNicholas Bellinger 2850b8d26b3bSNicholas Bellinger rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); 2851bdf20e72SSagi Grimberg if (rc) 285224f412ddSSagi Grimberg isert_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); 28539e961ae7SSagi Grimberg 2854302cc7c3SSagi Grimberg if (!isert_prot_cmd(isert_conn, se_cmd)) 285524f412ddSSagi Grimberg isert_dbg("Cmd: %p posted RDMA_WRITE + Response for iSER Data " 28569e961ae7SSagi Grimberg "READ\n", isert_cmd); 28579e961ae7SSagi Grimberg else 285824f412ddSSagi Grimberg isert_dbg("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", 285990ecc6e2SVu Pham isert_cmd); 2860b8d26b3bSNicholas Bellinger 286190ecc6e2SVu Pham return 1; 2862b8d26b3bSNicholas Bellinger } 2863b8d26b3bSNicholas Bellinger 2864b8d26b3bSNicholas Bellinger static int 2865b8d26b3bSNicholas Bellinger isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) 2866b8d26b3bSNicholas Bellinger { 2867b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 2868d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2869b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 2870b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2871d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 287290ecc6e2SVu Pham struct ib_send_wr *wr_failed; 287390ecc6e2SVu Pham int rc; 2874b8d26b3bSNicholas Bellinger 287524f412ddSSagi Grimberg isert_dbg("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", 287690ecc6e2SVu Pham isert_cmd, se_cmd->data_length, cmd->write_data_done); 2877b8d26b3bSNicholas Bellinger wr->iser_ib_op = ISER_IB_RDMA_READ; 2878d40945d8SVu Pham rc = device->reg_rdma_mem(conn, cmd, wr); 287990ecc6e2SVu Pham if (rc) { 288024f412ddSSagi Grimberg isert_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); 288190ecc6e2SVu Pham return rc; 2882b8d26b3bSNicholas Bellinger } 2883b8d26b3bSNicholas Bellinger 2884b8d26b3bSNicholas Bellinger rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); 2885bdf20e72SSagi Grimberg if (rc) 288624f412ddSSagi Grimberg isert_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); 2887bdf20e72SSagi Grimberg 288824f412ddSSagi Grimberg isert_dbg("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", 288990ecc6e2SVu Pham isert_cmd); 2890b8d26b3bSNicholas Bellinger 289190ecc6e2SVu Pham return 0; 2892b8d26b3bSNicholas Bellinger } 2893b8d26b3bSNicholas Bellinger 2894b8d26b3bSNicholas Bellinger static int 2895b8d26b3bSNicholas Bellinger isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) 2896b8d26b3bSNicholas Bellinger { 2897b8d26b3bSNicholas Bellinger int ret; 2898b8d26b3bSNicholas Bellinger 2899b8d26b3bSNicholas Bellinger switch (state) { 2900b8d26b3bSNicholas Bellinger case ISTATE_SEND_NOPIN_WANT_RESPONSE: 2901b8d26b3bSNicholas Bellinger ret = isert_put_nopin(cmd, conn, false); 2902b8d26b3bSNicholas Bellinger break; 2903b8d26b3bSNicholas Bellinger default: 290424f412ddSSagi Grimberg isert_err("Unknown immediate state: 0x%02x\n", state); 2905b8d26b3bSNicholas Bellinger ret = -EINVAL; 2906b8d26b3bSNicholas Bellinger break; 2907b8d26b3bSNicholas Bellinger } 2908b8d26b3bSNicholas Bellinger 2909b8d26b3bSNicholas Bellinger return ret; 2910b8d26b3bSNicholas Bellinger } 2911b8d26b3bSNicholas Bellinger 2912b8d26b3bSNicholas Bellinger static int 2913b8d26b3bSNicholas Bellinger isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) 2914b8d26b3bSNicholas Bellinger { 2915991bb764SSagi Grimberg struct isert_conn *isert_conn = conn->context; 2916b8d26b3bSNicholas Bellinger int ret; 2917b8d26b3bSNicholas Bellinger 2918b8d26b3bSNicholas Bellinger switch (state) { 2919b8d26b3bSNicholas Bellinger case ISTATE_SEND_LOGOUTRSP: 2920b8d26b3bSNicholas Bellinger ret = isert_put_logout_rsp(cmd, conn); 2921991bb764SSagi Grimberg if (!ret) 2922991bb764SSagi Grimberg isert_conn->logout_posted = true; 2923b8d26b3bSNicholas Bellinger break; 2924b8d26b3bSNicholas Bellinger case ISTATE_SEND_NOPIN: 2925b8d26b3bSNicholas Bellinger ret = isert_put_nopin(cmd, conn, true); 2926b8d26b3bSNicholas Bellinger break; 2927b8d26b3bSNicholas Bellinger case ISTATE_SEND_TASKMGTRSP: 2928b8d26b3bSNicholas Bellinger ret = isert_put_tm_rsp(cmd, conn); 2929b8d26b3bSNicholas Bellinger break; 2930b8d26b3bSNicholas Bellinger case ISTATE_SEND_REJECT: 2931b8d26b3bSNicholas Bellinger ret = isert_put_reject(cmd, conn); 2932b8d26b3bSNicholas Bellinger break; 2933adb54c29SNicholas Bellinger case ISTATE_SEND_TEXTRSP: 2934adb54c29SNicholas Bellinger ret = isert_put_text_rsp(cmd, conn); 2935adb54c29SNicholas Bellinger break; 2936b8d26b3bSNicholas Bellinger case ISTATE_SEND_STATUS: 2937b8d26b3bSNicholas Bellinger /* 2938b8d26b3bSNicholas Bellinger * Special case for sending non GOOD SCSI status from TX thread 2939b8d26b3bSNicholas Bellinger * context during pre se_cmd excecution failure. 2940b8d26b3bSNicholas Bellinger */ 2941b8d26b3bSNicholas Bellinger ret = isert_put_response(conn, cmd); 2942b8d26b3bSNicholas Bellinger break; 2943b8d26b3bSNicholas Bellinger default: 294424f412ddSSagi Grimberg isert_err("Unknown response state: 0x%02x\n", state); 2945b8d26b3bSNicholas Bellinger ret = -EINVAL; 2946b8d26b3bSNicholas Bellinger break; 2947b8d26b3bSNicholas Bellinger } 2948b8d26b3bSNicholas Bellinger 2949b8d26b3bSNicholas Bellinger return ret; 2950b8d26b3bSNicholas Bellinger } 2951b8d26b3bSNicholas Bellinger 2952ca6c1d82SSagi Grimberg struct rdma_cm_id * 2953ca6c1d82SSagi Grimberg isert_setup_id(struct isert_np *isert_np) 2954ca6c1d82SSagi Grimberg { 2955ca6c1d82SSagi Grimberg struct iscsi_np *np = isert_np->np; 2956ca6c1d82SSagi Grimberg struct rdma_cm_id *id; 2957ca6c1d82SSagi Grimberg struct sockaddr *sa; 2958ca6c1d82SSagi Grimberg int ret; 2959ca6c1d82SSagi Grimberg 2960ca6c1d82SSagi Grimberg sa = (struct sockaddr *)&np->np_sockaddr; 296124f412ddSSagi Grimberg isert_dbg("ksockaddr: %p, sa: %p\n", &np->np_sockaddr, sa); 2962ca6c1d82SSagi Grimberg 2963ca6c1d82SSagi Grimberg id = rdma_create_id(isert_cma_handler, isert_np, 2964ca6c1d82SSagi Grimberg RDMA_PS_TCP, IB_QPT_RC); 2965ca6c1d82SSagi Grimberg if (IS_ERR(id)) { 296624f412ddSSagi Grimberg isert_err("rdma_create_id() failed: %ld\n", PTR_ERR(id)); 2967ca6c1d82SSagi Grimberg ret = PTR_ERR(id); 2968ca6c1d82SSagi Grimberg goto out; 2969ca6c1d82SSagi Grimberg } 297024f412ddSSagi Grimberg isert_dbg("id %p context %p\n", id, id->context); 2971ca6c1d82SSagi Grimberg 2972ca6c1d82SSagi Grimberg ret = rdma_bind_addr(id, sa); 2973ca6c1d82SSagi Grimberg if (ret) { 297424f412ddSSagi Grimberg isert_err("rdma_bind_addr() failed: %d\n", ret); 2975ca6c1d82SSagi Grimberg goto out_id; 2976ca6c1d82SSagi Grimberg } 2977ca6c1d82SSagi Grimberg 2978ca6c1d82SSagi Grimberg ret = rdma_listen(id, ISERT_RDMA_LISTEN_BACKLOG); 2979ca6c1d82SSagi Grimberg if (ret) { 298024f412ddSSagi Grimberg isert_err("rdma_listen() failed: %d\n", ret); 2981ca6c1d82SSagi Grimberg goto out_id; 2982ca6c1d82SSagi Grimberg } 2983ca6c1d82SSagi Grimberg 2984ca6c1d82SSagi Grimberg return id; 2985ca6c1d82SSagi Grimberg out_id: 2986ca6c1d82SSagi Grimberg rdma_destroy_id(id); 2987ca6c1d82SSagi Grimberg out: 2988ca6c1d82SSagi Grimberg return ERR_PTR(ret); 2989ca6c1d82SSagi Grimberg } 2990ca6c1d82SSagi Grimberg 2991b8d26b3bSNicholas Bellinger static int 2992b8d26b3bSNicholas Bellinger isert_setup_np(struct iscsi_np *np, 2993b8d26b3bSNicholas Bellinger struct __kernel_sockaddr_storage *ksockaddr) 2994b8d26b3bSNicholas Bellinger { 2995b8d26b3bSNicholas Bellinger struct isert_np *isert_np; 2996b8d26b3bSNicholas Bellinger struct rdma_cm_id *isert_lid; 2997b8d26b3bSNicholas Bellinger int ret; 2998b8d26b3bSNicholas Bellinger 2999b8d26b3bSNicholas Bellinger isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); 3000b8d26b3bSNicholas Bellinger if (!isert_np) { 300124f412ddSSagi Grimberg isert_err("Unable to allocate struct isert_np\n"); 3002b8d26b3bSNicholas Bellinger return -ENOMEM; 3003b8d26b3bSNicholas Bellinger } 3004531b7bf4SSagi Grimberg sema_init(&isert_np->np_sem, 0); 3005b8d26b3bSNicholas Bellinger mutex_init(&isert_np->np_accept_mutex); 3006b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&isert_np->np_accept_list); 3007b8d26b3bSNicholas Bellinger init_completion(&isert_np->np_login_comp); 3008ca6c1d82SSagi Grimberg isert_np->np = np; 3009b8d26b3bSNicholas Bellinger 3010b8d26b3bSNicholas Bellinger /* 3011b8d26b3bSNicholas Bellinger * Setup the np->np_sockaddr from the passed sockaddr setup 3012b8d26b3bSNicholas Bellinger * in iscsi_target_configfs.c code.. 3013b8d26b3bSNicholas Bellinger */ 3014b8d26b3bSNicholas Bellinger memcpy(&np->np_sockaddr, ksockaddr, 3015b8d26b3bSNicholas Bellinger sizeof(struct __kernel_sockaddr_storage)); 3016b8d26b3bSNicholas Bellinger 3017ca6c1d82SSagi Grimberg isert_lid = isert_setup_id(isert_np); 3018b8d26b3bSNicholas Bellinger if (IS_ERR(isert_lid)) { 3019b8d26b3bSNicholas Bellinger ret = PTR_ERR(isert_lid); 3020b8d26b3bSNicholas Bellinger goto out; 3021b8d26b3bSNicholas Bellinger } 3022b8d26b3bSNicholas Bellinger 3023b8d26b3bSNicholas Bellinger isert_np->np_cm_id = isert_lid; 3024b8d26b3bSNicholas Bellinger np->np_context = isert_np; 3025b8d26b3bSNicholas Bellinger 3026b8d26b3bSNicholas Bellinger return 0; 3027b8d26b3bSNicholas Bellinger 3028b8d26b3bSNicholas Bellinger out: 3029b8d26b3bSNicholas Bellinger kfree(isert_np); 3030ca6c1d82SSagi Grimberg 3031b8d26b3bSNicholas Bellinger return ret; 3032b8d26b3bSNicholas Bellinger } 3033b8d26b3bSNicholas Bellinger 3034b8d26b3bSNicholas Bellinger static int 3035b8d26b3bSNicholas Bellinger isert_rdma_accept(struct isert_conn *isert_conn) 3036b8d26b3bSNicholas Bellinger { 3037b8d26b3bSNicholas Bellinger struct rdma_cm_id *cm_id = isert_conn->conn_cm_id; 3038b8d26b3bSNicholas Bellinger struct rdma_conn_param cp; 3039b8d26b3bSNicholas Bellinger int ret; 3040b8d26b3bSNicholas Bellinger 3041b8d26b3bSNicholas Bellinger memset(&cp, 0, sizeof(struct rdma_conn_param)); 3042b8d26b3bSNicholas Bellinger cp.initiator_depth = isert_conn->initiator_depth; 3043b8d26b3bSNicholas Bellinger cp.retry_count = 7; 3044b8d26b3bSNicholas Bellinger cp.rnr_retry_count = 7; 3045b8d26b3bSNicholas Bellinger 3046b8d26b3bSNicholas Bellinger ret = rdma_accept(cm_id, &cp); 3047b8d26b3bSNicholas Bellinger if (ret) { 304824f412ddSSagi Grimberg isert_err("rdma_accept() failed with: %d\n", ret); 3049b8d26b3bSNicholas Bellinger return ret; 3050b8d26b3bSNicholas Bellinger } 3051b8d26b3bSNicholas Bellinger 3052b8d26b3bSNicholas Bellinger return 0; 3053b8d26b3bSNicholas Bellinger } 3054b8d26b3bSNicholas Bellinger 3055b8d26b3bSNicholas Bellinger static int 3056b8d26b3bSNicholas Bellinger isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) 3057b8d26b3bSNicholas Bellinger { 3058b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 3059b8d26b3bSNicholas Bellinger int ret; 3060b8d26b3bSNicholas Bellinger 306124f412ddSSagi Grimberg isert_info("before login_req comp conn: %p\n", isert_conn); 30622371e5daSSagi Grimberg ret = wait_for_completion_interruptible(&isert_conn->login_req_comp); 30632371e5daSSagi Grimberg if (ret) { 306424f412ddSSagi Grimberg isert_err("isert_conn %p interrupted before got login req\n", 30652371e5daSSagi Grimberg isert_conn); 30662371e5daSSagi Grimberg return ret; 30672371e5daSSagi Grimberg } 30682371e5daSSagi Grimberg reinit_completion(&isert_conn->login_req_comp); 30692371e5daSSagi Grimberg 30706faaa85fSNicholas Bellinger /* 30716faaa85fSNicholas Bellinger * For login requests after the first PDU, isert_rx_login_req() will 30726faaa85fSNicholas Bellinger * kick schedule_delayed_work(&conn->login_work) as the packet is 30736faaa85fSNicholas Bellinger * received, which turns this callback from iscsi_target_do_login_rx() 30746faaa85fSNicholas Bellinger * into a NOP. 30756faaa85fSNicholas Bellinger */ 30766faaa85fSNicholas Bellinger if (!login->first_request) 30776faaa85fSNicholas Bellinger return 0; 3078b8d26b3bSNicholas Bellinger 30792371e5daSSagi Grimberg isert_rx_login_req(isert_conn); 30802371e5daSSagi Grimberg 308124f412ddSSagi Grimberg isert_info("before conn_login_comp conn: %p\n", conn); 3082b8d26b3bSNicholas Bellinger ret = wait_for_completion_interruptible(&isert_conn->conn_login_comp); 3083b8d26b3bSNicholas Bellinger if (ret) 3084b8d26b3bSNicholas Bellinger return ret; 3085b8d26b3bSNicholas Bellinger 308624f412ddSSagi Grimberg isert_info("processing login->req: %p\n", login->req); 30872371e5daSSagi Grimberg 3088b8d26b3bSNicholas Bellinger return 0; 3089b8d26b3bSNicholas Bellinger } 3090b8d26b3bSNicholas Bellinger 3091b8d26b3bSNicholas Bellinger static void 3092b8d26b3bSNicholas Bellinger isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, 3093b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn) 3094b8d26b3bSNicholas Bellinger { 3095b8d26b3bSNicholas Bellinger struct rdma_cm_id *cm_id = isert_conn->conn_cm_id; 3096b8d26b3bSNicholas Bellinger struct rdma_route *cm_route = &cm_id->route; 3097b8d26b3bSNicholas Bellinger struct sockaddr_in *sock_in; 3098b8d26b3bSNicholas Bellinger struct sockaddr_in6 *sock_in6; 3099b8d26b3bSNicholas Bellinger 3100b8d26b3bSNicholas Bellinger conn->login_family = np->np_sockaddr.ss_family; 3101b8d26b3bSNicholas Bellinger 3102b8d26b3bSNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 3103b8d26b3bSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.dst_addr; 3104b8d26b3bSNicholas Bellinger snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c", 3105b8d26b3bSNicholas Bellinger &sock_in6->sin6_addr.in6_u); 3106b8d26b3bSNicholas Bellinger conn->login_port = ntohs(sock_in6->sin6_port); 3107b8d26b3bSNicholas Bellinger 3108b8d26b3bSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.src_addr; 3109b8d26b3bSNicholas Bellinger snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c", 3110b8d26b3bSNicholas Bellinger &sock_in6->sin6_addr.in6_u); 3111b8d26b3bSNicholas Bellinger conn->local_port = ntohs(sock_in6->sin6_port); 3112b8d26b3bSNicholas Bellinger } else { 3113b8d26b3bSNicholas Bellinger sock_in = (struct sockaddr_in *)&cm_route->addr.dst_addr; 3114b8d26b3bSNicholas Bellinger sprintf(conn->login_ip, "%pI4", 3115b8d26b3bSNicholas Bellinger &sock_in->sin_addr.s_addr); 3116b8d26b3bSNicholas Bellinger conn->login_port = ntohs(sock_in->sin_port); 3117b8d26b3bSNicholas Bellinger 3118b8d26b3bSNicholas Bellinger sock_in = (struct sockaddr_in *)&cm_route->addr.src_addr; 3119b8d26b3bSNicholas Bellinger sprintf(conn->local_ip, "%pI4", 3120b8d26b3bSNicholas Bellinger &sock_in->sin_addr.s_addr); 3121b8d26b3bSNicholas Bellinger conn->local_port = ntohs(sock_in->sin_port); 3122b8d26b3bSNicholas Bellinger } 3123b8d26b3bSNicholas Bellinger } 3124b8d26b3bSNicholas Bellinger 3125b8d26b3bSNicholas Bellinger static int 3126b8d26b3bSNicholas Bellinger isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) 3127b8d26b3bSNicholas Bellinger { 3128b8d26b3bSNicholas Bellinger struct isert_np *isert_np = (struct isert_np *)np->np_context; 3129b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 3130b8d26b3bSNicholas Bellinger int max_accept = 0, ret; 3131b8d26b3bSNicholas Bellinger 3132b8d26b3bSNicholas Bellinger accept_wait: 3133531b7bf4SSagi Grimberg ret = down_interruptible(&isert_np->np_sem); 31341acff63fSSagi Grimberg if (ret || max_accept > 5) 3135b8d26b3bSNicholas Bellinger return -ENODEV; 3136b8d26b3bSNicholas Bellinger 3137b8d26b3bSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 3138e346ab34SSagi Grimberg if (np->np_thread_state >= ISCSI_NP_THREAD_RESET) { 3139b8d26b3bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 3140*11378cdbSRasmus Villemoes isert_dbg("np_thread_state %d\n", 3141e346ab34SSagi Grimberg np->np_thread_state); 3142e346ab34SSagi Grimberg /** 3143e346ab34SSagi Grimberg * No point in stalling here when np_thread 3144e346ab34SSagi Grimberg * is in state RESET/SHUTDOWN/EXIT - bail 3145e346ab34SSagi Grimberg **/ 3146b8d26b3bSNicholas Bellinger return -ENODEV; 3147b8d26b3bSNicholas Bellinger } 3148b8d26b3bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 3149b8d26b3bSNicholas Bellinger 3150b8d26b3bSNicholas Bellinger mutex_lock(&isert_np->np_accept_mutex); 3151b8d26b3bSNicholas Bellinger if (list_empty(&isert_np->np_accept_list)) { 3152b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 3153b8d26b3bSNicholas Bellinger max_accept++; 3154b8d26b3bSNicholas Bellinger goto accept_wait; 3155b8d26b3bSNicholas Bellinger } 3156b8d26b3bSNicholas Bellinger isert_conn = list_first_entry(&isert_np->np_accept_list, 3157b8d26b3bSNicholas Bellinger struct isert_conn, conn_accept_node); 3158b8d26b3bSNicholas Bellinger list_del_init(&isert_conn->conn_accept_node); 3159b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 3160b8d26b3bSNicholas Bellinger 3161b8d26b3bSNicholas Bellinger conn->context = isert_conn; 3162b8d26b3bSNicholas Bellinger isert_conn->conn = conn; 3163b8d26b3bSNicholas Bellinger max_accept = 0; 3164b8d26b3bSNicholas Bellinger 3165b8d26b3bSNicholas Bellinger isert_set_conn_info(np, conn, isert_conn); 3166b8d26b3bSNicholas Bellinger 316724f412ddSSagi Grimberg isert_dbg("Processing isert_conn: %p\n", isert_conn); 31682371e5daSSagi Grimberg 3169b8d26b3bSNicholas Bellinger return 0; 3170b8d26b3bSNicholas Bellinger } 3171b8d26b3bSNicholas Bellinger 3172b8d26b3bSNicholas Bellinger static void 3173b8d26b3bSNicholas Bellinger isert_free_np(struct iscsi_np *np) 3174b8d26b3bSNicholas Bellinger { 3175b8d26b3bSNicholas Bellinger struct isert_np *isert_np = (struct isert_np *)np->np_context; 3176268e6811SSagi Grimberg struct isert_conn *isert_conn, *n; 3177b8d26b3bSNicholas Bellinger 31783b726ae2SSagi Grimberg if (isert_np->np_cm_id) 3179b8d26b3bSNicholas Bellinger rdma_destroy_id(isert_np->np_cm_id); 3180b8d26b3bSNicholas Bellinger 3181268e6811SSagi Grimberg /* 3182268e6811SSagi Grimberg * FIXME: At this point we don't have a good way to insure 3183268e6811SSagi Grimberg * that at this point we don't have hanging connections that 3184268e6811SSagi Grimberg * completed RDMA establishment but didn't start iscsi login 3185268e6811SSagi Grimberg * process. So work-around this by cleaning up what ever piled 3186268e6811SSagi Grimberg * up in np_accept_list. 3187268e6811SSagi Grimberg */ 3188268e6811SSagi Grimberg mutex_lock(&isert_np->np_accept_mutex); 3189268e6811SSagi Grimberg if (!list_empty(&isert_np->np_accept_list)) { 319024f412ddSSagi Grimberg isert_info("Still have isert connections, cleaning up...\n"); 3191268e6811SSagi Grimberg list_for_each_entry_safe(isert_conn, n, 3192268e6811SSagi Grimberg &isert_np->np_accept_list, 3193268e6811SSagi Grimberg conn_accept_node) { 319424f412ddSSagi Grimberg isert_info("cleaning isert_conn %p state (%d)\n", 3195268e6811SSagi Grimberg isert_conn, isert_conn->state); 3196268e6811SSagi Grimberg isert_connect_release(isert_conn); 3197268e6811SSagi Grimberg } 3198268e6811SSagi Grimberg } 3199268e6811SSagi Grimberg mutex_unlock(&isert_np->np_accept_mutex); 3200268e6811SSagi Grimberg 3201b8d26b3bSNicholas Bellinger np->np_context = NULL; 3202b8d26b3bSNicholas Bellinger kfree(isert_np); 3203b8d26b3bSNicholas Bellinger } 3204b8d26b3bSNicholas Bellinger 3205b02efbfcSSagi Grimberg static void isert_release_work(struct work_struct *work) 3206b02efbfcSSagi Grimberg { 3207b02efbfcSSagi Grimberg struct isert_conn *isert_conn = container_of(work, 3208b02efbfcSSagi Grimberg struct isert_conn, 3209b02efbfcSSagi Grimberg release_work); 3210b02efbfcSSagi Grimberg 321124f412ddSSagi Grimberg isert_info("Starting release conn %p\n", isert_conn); 3212b02efbfcSSagi Grimberg 3213b02efbfcSSagi Grimberg wait_for_completion(&isert_conn->conn_wait); 3214b02efbfcSSagi Grimberg 3215b02efbfcSSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 3216b02efbfcSSagi Grimberg isert_conn->state = ISER_CONN_DOWN; 3217b02efbfcSSagi Grimberg mutex_unlock(&isert_conn->conn_mutex); 3218b02efbfcSSagi Grimberg 321924f412ddSSagi Grimberg isert_info("Destroying conn %p\n", isert_conn); 3220b02efbfcSSagi Grimberg isert_put_conn(isert_conn); 3221b02efbfcSSagi Grimberg } 3222b02efbfcSSagi Grimberg 3223bdf20e72SSagi Grimberg static void 3224991bb764SSagi Grimberg isert_wait4logout(struct isert_conn *isert_conn) 3225991bb764SSagi Grimberg { 3226991bb764SSagi Grimberg struct iscsi_conn *conn = isert_conn->conn; 3227991bb764SSagi Grimberg 32284c22e07fSSagi Grimberg isert_info("conn %p\n", isert_conn); 32294c22e07fSSagi Grimberg 3230991bb764SSagi Grimberg if (isert_conn->logout_posted) { 323124f412ddSSagi Grimberg isert_info("conn %p wait for conn_logout_comp\n", isert_conn); 3232991bb764SSagi Grimberg wait_for_completion_timeout(&conn->conn_logout_comp, 3233991bb764SSagi Grimberg SECONDS_FOR_LOGOUT_COMP * HZ); 3234991bb764SSagi Grimberg } 3235991bb764SSagi Grimberg } 3236991bb764SSagi Grimberg 3237991bb764SSagi Grimberg static void 3238c7e160eeSSagi Grimberg isert_wait4cmds(struct iscsi_conn *conn) 3239c7e160eeSSagi Grimberg { 32404c22e07fSSagi Grimberg isert_info("iscsi_conn %p\n", conn); 32414c22e07fSSagi Grimberg 3242c7e160eeSSagi Grimberg if (conn->sess) { 3243c7e160eeSSagi Grimberg target_sess_cmd_list_set_waiting(conn->sess->se_sess); 3244c7e160eeSSagi Grimberg target_wait_for_sess_cmds(conn->sess->se_sess); 3245c7e160eeSSagi Grimberg } 3246c7e160eeSSagi Grimberg } 3247c7e160eeSSagi Grimberg 3248c7e160eeSSagi Grimberg static void 3249bdf20e72SSagi Grimberg isert_wait4flush(struct isert_conn *isert_conn) 3250bdf20e72SSagi Grimberg { 3251bdf20e72SSagi Grimberg struct ib_recv_wr *bad_wr; 3252bdf20e72SSagi Grimberg 32534c22e07fSSagi Grimberg isert_info("conn %p\n", isert_conn); 32544c22e07fSSagi Grimberg 3255bdf20e72SSagi Grimberg init_completion(&isert_conn->conn_wait_comp_err); 3256bdf20e72SSagi Grimberg isert_conn->beacon.wr_id = ISER_BEACON_WRID; 3257bdf20e72SSagi Grimberg /* post an indication that all flush errors were consumed */ 3258bdf20e72SSagi Grimberg if (ib_post_recv(isert_conn->conn_qp, &isert_conn->beacon, &bad_wr)) { 325924f412ddSSagi Grimberg isert_err("conn %p failed to post beacon", isert_conn); 3260bdf20e72SSagi Grimberg return; 3261bdf20e72SSagi Grimberg } 3262bdf20e72SSagi Grimberg 3263bdf20e72SSagi Grimberg wait_for_completion(&isert_conn->conn_wait_comp_err); 3264bdf20e72SSagi Grimberg } 3265bdf20e72SSagi Grimberg 3266defd8848SNicholas Bellinger static void isert_wait_conn(struct iscsi_conn *conn) 3267b8d26b3bSNicholas Bellinger { 3268b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = conn->context; 3269b8d26b3bSNicholas Bellinger 32704c22e07fSSagi Grimberg isert_info("Starting conn %p\n", isert_conn); 3271b8d26b3bSNicholas Bellinger 32729d49f5e2SSagi Grimberg mutex_lock(&isert_conn->conn_mutex); 3273b8d26b3bSNicholas Bellinger /* 3274b8d26b3bSNicholas Bellinger * Only wait for conn_wait_comp_err if the isert_conn made it 3275b8d26b3bSNicholas Bellinger * into full feature phase.. 3276b8d26b3bSNicholas Bellinger */ 3277b2cb9649SNicholas Bellinger if (isert_conn->state == ISER_CONN_INIT) { 3278b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 3279b2cb9649SNicholas Bellinger return; 3280b2cb9649SNicholas Bellinger } 3281954f2372SSagi Grimberg isert_conn_terminate(isert_conn); 3282b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 3283b2cb9649SNicholas Bellinger 3284c7e160eeSSagi Grimberg isert_wait4cmds(conn); 3285bdf20e72SSagi Grimberg isert_wait4flush(isert_conn); 3286991bb764SSagi Grimberg isert_wait4logout(isert_conn); 3287954f2372SSagi Grimberg 3288b02efbfcSSagi Grimberg INIT_WORK(&isert_conn->release_work, isert_release_work); 3289b02efbfcSSagi Grimberg queue_work(isert_release_wq, &isert_conn->release_work); 3290defd8848SNicholas Bellinger } 3291defd8848SNicholas Bellinger 3292defd8848SNicholas Bellinger static void isert_free_conn(struct iscsi_conn *conn) 3293defd8848SNicholas Bellinger { 3294defd8848SNicholas Bellinger struct isert_conn *isert_conn = conn->context; 3295b8d26b3bSNicholas Bellinger 3296b8d26b3bSNicholas Bellinger isert_put_conn(isert_conn); 3297b8d26b3bSNicholas Bellinger } 3298b8d26b3bSNicholas Bellinger 3299b8d26b3bSNicholas Bellinger static struct iscsit_transport iser_target_transport = { 3300b8d26b3bSNicholas Bellinger .name = "IB/iSER", 3301b8d26b3bSNicholas Bellinger .transport_type = ISCSI_INFINIBAND, 3302d703ce2fSNicholas Bellinger .priv_size = sizeof(struct isert_cmd), 3303b8d26b3bSNicholas Bellinger .owner = THIS_MODULE, 3304b8d26b3bSNicholas Bellinger .iscsit_setup_np = isert_setup_np, 3305b8d26b3bSNicholas Bellinger .iscsit_accept_np = isert_accept_np, 3306b8d26b3bSNicholas Bellinger .iscsit_free_np = isert_free_np, 3307defd8848SNicholas Bellinger .iscsit_wait_conn = isert_wait_conn, 3308b8d26b3bSNicholas Bellinger .iscsit_free_conn = isert_free_conn, 3309b8d26b3bSNicholas Bellinger .iscsit_get_login_rx = isert_get_login_rx, 3310b8d26b3bSNicholas Bellinger .iscsit_put_login_tx = isert_put_login_tx, 3311b8d26b3bSNicholas Bellinger .iscsit_immediate_queue = isert_immediate_queue, 3312b8d26b3bSNicholas Bellinger .iscsit_response_queue = isert_response_queue, 3313b8d26b3bSNicholas Bellinger .iscsit_get_dataout = isert_get_dataout, 3314b8d26b3bSNicholas Bellinger .iscsit_queue_data_in = isert_put_datain, 3315b8d26b3bSNicholas Bellinger .iscsit_queue_status = isert_put_response, 3316131e6abcSNicholas Bellinger .iscsit_aborted_task = isert_aborted_task, 3317e70beee7SNicholas Bellinger .iscsit_get_sup_prot_ops = isert_get_sup_prot_ops, 3318b8d26b3bSNicholas Bellinger }; 3319b8d26b3bSNicholas Bellinger 3320b8d26b3bSNicholas Bellinger static int __init isert_init(void) 3321b8d26b3bSNicholas Bellinger { 3322b8d26b3bSNicholas Bellinger int ret; 3323b8d26b3bSNicholas Bellinger 3324631af550SSagi Grimberg isert_comp_wq = alloc_workqueue("isert_comp_wq", 3325631af550SSagi Grimberg WQ_UNBOUND | WQ_HIGHPRI, 0); 3326b8d26b3bSNicholas Bellinger if (!isert_comp_wq) { 332724f412ddSSagi Grimberg isert_err("Unable to allocate isert_comp_wq\n"); 3328b8d26b3bSNicholas Bellinger ret = -ENOMEM; 33296f0fae3dSSagi Grimberg return -ENOMEM; 3330b8d26b3bSNicholas Bellinger } 3331b8d26b3bSNicholas Bellinger 3332b02efbfcSSagi Grimberg isert_release_wq = alloc_workqueue("isert_release_wq", WQ_UNBOUND, 3333b02efbfcSSagi Grimberg WQ_UNBOUND_MAX_ACTIVE); 3334b02efbfcSSagi Grimberg if (!isert_release_wq) { 333524f412ddSSagi Grimberg isert_err("Unable to allocate isert_release_wq\n"); 3336b02efbfcSSagi Grimberg ret = -ENOMEM; 3337b02efbfcSSagi Grimberg goto destroy_comp_wq; 3338b02efbfcSSagi Grimberg } 3339b02efbfcSSagi Grimberg 3340b8d26b3bSNicholas Bellinger iscsit_register_transport(&iser_target_transport); 334124f412ddSSagi Grimberg isert_info("iSER_TARGET[0] - Loaded iser_target_transport\n"); 3342b02efbfcSSagi Grimberg 3343b8d26b3bSNicholas Bellinger return 0; 3344b8d26b3bSNicholas Bellinger 3345b02efbfcSSagi Grimberg destroy_comp_wq: 3346b02efbfcSSagi Grimberg destroy_workqueue(isert_comp_wq); 33476f0fae3dSSagi Grimberg 3348b8d26b3bSNicholas Bellinger return ret; 3349b8d26b3bSNicholas Bellinger } 3350b8d26b3bSNicholas Bellinger 3351b8d26b3bSNicholas Bellinger static void __exit isert_exit(void) 3352b8d26b3bSNicholas Bellinger { 3353f5ebec96SSagi Grimberg flush_scheduled_work(); 3354b02efbfcSSagi Grimberg destroy_workqueue(isert_release_wq); 3355b8d26b3bSNicholas Bellinger destroy_workqueue(isert_comp_wq); 3356b8d26b3bSNicholas Bellinger iscsit_unregister_transport(&iser_target_transport); 33574c22e07fSSagi Grimberg isert_info("iSER_TARGET[0] - Released iser_target_transport\n"); 3358b8d26b3bSNicholas Bellinger } 3359b8d26b3bSNicholas Bellinger 3360b8d26b3bSNicholas Bellinger MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); 3361b8d26b3bSNicholas Bellinger MODULE_VERSION("0.1"); 3362b8d26b3bSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3363b8d26b3bSNicholas Bellinger MODULE_LICENSE("GPL"); 3364b8d26b3bSNicholas Bellinger 3365b8d26b3bSNicholas Bellinger module_init(isert_init); 3366b8d26b3bSNicholas Bellinger module_exit(isert_exit); 3367