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> 2595b60f07SNicholas Bellinger #include <linux/llist.h> 26b8d26b3bSNicholas Bellinger #include <rdma/ib_verbs.h> 27b8d26b3bSNicholas Bellinger #include <rdma/rdma_cm.h> 28b8d26b3bSNicholas Bellinger #include <target/target_core_base.h> 29b8d26b3bSNicholas Bellinger #include <target/target_core_fabric.h> 30b8d26b3bSNicholas Bellinger #include <target/iscsi/iscsi_transport.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) 38b8d26b3bSNicholas Bellinger 39b8d26b3bSNicholas Bellinger static DEFINE_MUTEX(device_list_mutex); 40b8d26b3bSNicholas Bellinger static LIST_HEAD(device_list); 41b8d26b3bSNicholas Bellinger static struct workqueue_struct *isert_rx_wq; 42b8d26b3bSNicholas Bellinger static struct workqueue_struct *isert_comp_wq; 43b8d26b3bSNicholas Bellinger 44b8d26b3bSNicholas Bellinger static void 45d40945d8SVu Pham isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); 46d40945d8SVu Pham static int 47d40945d8SVu Pham isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 48d40945d8SVu Pham struct isert_rdma_wr *wr); 4959464ef4SVu Pham static void 50a3a5a826SSagi Grimberg isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn); 5159464ef4SVu Pham static int 52a3a5a826SSagi Grimberg isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 5359464ef4SVu Pham struct isert_rdma_wr *wr); 54f93f3a70SSagi Grimberg static int 55f93f3a70SSagi Grimberg isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd); 56d40945d8SVu Pham 57d40945d8SVu Pham static void 58b8d26b3bSNicholas Bellinger isert_qp_event_callback(struct ib_event *e, void *context) 59b8d26b3bSNicholas Bellinger { 60b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)context; 61b8d26b3bSNicholas Bellinger 62b8d26b3bSNicholas Bellinger pr_err("isert_qp_event_callback event: %d\n", e->event); 63b8d26b3bSNicholas Bellinger switch (e->event) { 64b8d26b3bSNicholas Bellinger case IB_EVENT_COMM_EST: 65b8d26b3bSNicholas Bellinger rdma_notify(isert_conn->conn_cm_id, IB_EVENT_COMM_EST); 66b8d26b3bSNicholas Bellinger break; 67b8d26b3bSNicholas Bellinger case IB_EVENT_QP_LAST_WQE_REACHED: 68b8d26b3bSNicholas Bellinger pr_warn("Reached TX IB_EVENT_QP_LAST_WQE_REACHED:\n"); 69b8d26b3bSNicholas Bellinger break; 70b8d26b3bSNicholas Bellinger default: 71b8d26b3bSNicholas Bellinger break; 72b8d26b3bSNicholas Bellinger } 73b8d26b3bSNicholas Bellinger } 74b8d26b3bSNicholas Bellinger 75b8d26b3bSNicholas Bellinger static int 76b8d26b3bSNicholas Bellinger isert_query_device(struct ib_device *ib_dev, struct ib_device_attr *devattr) 77b8d26b3bSNicholas Bellinger { 78b8d26b3bSNicholas Bellinger int ret; 79b8d26b3bSNicholas Bellinger 80b8d26b3bSNicholas Bellinger ret = ib_query_device(ib_dev, devattr); 81b8d26b3bSNicholas Bellinger if (ret) { 82b8d26b3bSNicholas Bellinger pr_err("ib_query_device() failed: %d\n", ret); 83b8d26b3bSNicholas Bellinger return ret; 84b8d26b3bSNicholas Bellinger } 85b8d26b3bSNicholas Bellinger pr_debug("devattr->max_sge: %d\n", devattr->max_sge); 86b8d26b3bSNicholas Bellinger pr_debug("devattr->max_sge_rd: %d\n", devattr->max_sge_rd); 87b8d26b3bSNicholas Bellinger 88b8d26b3bSNicholas Bellinger return 0; 89b8d26b3bSNicholas Bellinger } 90b8d26b3bSNicholas Bellinger 91b8d26b3bSNicholas Bellinger static int 92d3e125daSSagi Grimberg isert_conn_setup_qp(struct isert_conn *isert_conn, struct rdma_cm_id *cma_id, 93d3e125daSSagi Grimberg u8 protection) 94b8d26b3bSNicholas Bellinger { 95b8d26b3bSNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 96b8d26b3bSNicholas Bellinger struct ib_qp_init_attr attr; 97b8d26b3bSNicholas Bellinger int ret, index, min_index = 0; 98b8d26b3bSNicholas Bellinger 99b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 100b8d26b3bSNicholas Bellinger for (index = 0; index < device->cqs_used; index++) 101b8d26b3bSNicholas Bellinger if (device->cq_active_qps[index] < 102b8d26b3bSNicholas Bellinger device->cq_active_qps[min_index]) 103b8d26b3bSNicholas Bellinger min_index = index; 104b8d26b3bSNicholas Bellinger device->cq_active_qps[min_index]++; 105b8d26b3bSNicholas Bellinger pr_debug("isert_conn_setup_qp: Using min_index: %d\n", min_index); 106b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 107b8d26b3bSNicholas Bellinger 108b8d26b3bSNicholas Bellinger memset(&attr, 0, sizeof(struct ib_qp_init_attr)); 109b8d26b3bSNicholas Bellinger attr.event_handler = isert_qp_event_callback; 110b8d26b3bSNicholas Bellinger attr.qp_context = isert_conn; 111b8d26b3bSNicholas Bellinger attr.send_cq = device->dev_tx_cq[min_index]; 112b8d26b3bSNicholas Bellinger attr.recv_cq = device->dev_rx_cq[min_index]; 113b8d26b3bSNicholas Bellinger attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS; 114b8d26b3bSNicholas Bellinger attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS; 115b8d26b3bSNicholas Bellinger /* 116b8d26b3bSNicholas Bellinger * FIXME: Use devattr.max_sge - 2 for max_send_sge as 117b8d26b3bSNicholas Bellinger * work-around for RDMA_READ.. 118b8d26b3bSNicholas Bellinger */ 11959464ef4SVu Pham attr.cap.max_send_sge = device->dev_attr.max_sge - 2; 120b8d26b3bSNicholas Bellinger isert_conn->max_sge = attr.cap.max_send_sge; 121b8d26b3bSNicholas Bellinger 122b8d26b3bSNicholas Bellinger attr.cap.max_recv_sge = 1; 123b8d26b3bSNicholas Bellinger attr.sq_sig_type = IB_SIGNAL_REQ_WR; 124b8d26b3bSNicholas Bellinger attr.qp_type = IB_QPT_RC; 125d3e125daSSagi Grimberg if (protection) 126d3e125daSSagi Grimberg attr.create_flags |= IB_QP_CREATE_SIGNATURE_EN; 127b8d26b3bSNicholas Bellinger 128b8d26b3bSNicholas Bellinger pr_debug("isert_conn_setup_qp cma_id->device: %p\n", 129b8d26b3bSNicholas Bellinger cma_id->device); 130b8d26b3bSNicholas Bellinger pr_debug("isert_conn_setup_qp conn_pd->device: %p\n", 131b8d26b3bSNicholas Bellinger isert_conn->conn_pd->device); 132b8d26b3bSNicholas Bellinger 133b8d26b3bSNicholas Bellinger ret = rdma_create_qp(cma_id, isert_conn->conn_pd, &attr); 134b8d26b3bSNicholas Bellinger if (ret) { 135b8d26b3bSNicholas Bellinger pr_err("rdma_create_qp failed for cma_id %d\n", ret); 136b8d26b3bSNicholas Bellinger return ret; 137b8d26b3bSNicholas Bellinger } 138b8d26b3bSNicholas Bellinger isert_conn->conn_qp = cma_id->qp; 139b8d26b3bSNicholas Bellinger pr_debug("rdma_create_qp() returned success >>>>>>>>>>>>>>>>>>>>>>>>>.\n"); 140b8d26b3bSNicholas Bellinger 141b8d26b3bSNicholas Bellinger return 0; 142b8d26b3bSNicholas Bellinger } 143b8d26b3bSNicholas Bellinger 144b8d26b3bSNicholas Bellinger static void 145b8d26b3bSNicholas Bellinger isert_cq_event_callback(struct ib_event *e, void *context) 146b8d26b3bSNicholas Bellinger { 147b8d26b3bSNicholas Bellinger pr_debug("isert_cq_event_callback event: %d\n", e->event); 148b8d26b3bSNicholas Bellinger } 149b8d26b3bSNicholas Bellinger 150b8d26b3bSNicholas Bellinger static int 151b8d26b3bSNicholas Bellinger isert_alloc_rx_descriptors(struct isert_conn *isert_conn) 152b8d26b3bSNicholas Bellinger { 153b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 154b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 155b8d26b3bSNicholas Bellinger struct ib_sge *rx_sg; 156b8d26b3bSNicholas Bellinger u64 dma_addr; 157b8d26b3bSNicholas Bellinger int i, j; 158b8d26b3bSNicholas Bellinger 159b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = kzalloc(ISERT_QP_MAX_RECV_DTOS * 160b8d26b3bSNicholas Bellinger sizeof(struct iser_rx_desc), GFP_KERNEL); 161b8d26b3bSNicholas Bellinger if (!isert_conn->conn_rx_descs) 162b8d26b3bSNicholas Bellinger goto fail; 163b8d26b3bSNicholas Bellinger 164b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 165b8d26b3bSNicholas Bellinger 166b8d26b3bSNicholas Bellinger for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { 167b8d26b3bSNicholas Bellinger dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc, 168b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 169b8d26b3bSNicholas Bellinger if (ib_dma_mapping_error(ib_dev, dma_addr)) 170b8d26b3bSNicholas Bellinger goto dma_map_fail; 171b8d26b3bSNicholas Bellinger 172b8d26b3bSNicholas Bellinger rx_desc->dma_addr = dma_addr; 173b8d26b3bSNicholas Bellinger 174b8d26b3bSNicholas Bellinger rx_sg = &rx_desc->rx_sg; 175b8d26b3bSNicholas Bellinger rx_sg->addr = rx_desc->dma_addr; 176b8d26b3bSNicholas Bellinger rx_sg->length = ISER_RX_PAYLOAD_SIZE; 177b8d26b3bSNicholas Bellinger rx_sg->lkey = isert_conn->conn_mr->lkey; 178b8d26b3bSNicholas Bellinger } 179b8d26b3bSNicholas Bellinger 180b8d26b3bSNicholas Bellinger isert_conn->conn_rx_desc_head = 0; 181b8d26b3bSNicholas Bellinger return 0; 182b8d26b3bSNicholas Bellinger 183b8d26b3bSNicholas Bellinger dma_map_fail: 184b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 185b8d26b3bSNicholas Bellinger for (j = 0; j < i; j++, rx_desc++) { 186b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, 187b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 188b8d26b3bSNicholas Bellinger } 189b8d26b3bSNicholas Bellinger kfree(isert_conn->conn_rx_descs); 190b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = NULL; 191b8d26b3bSNicholas Bellinger fail: 192b8d26b3bSNicholas Bellinger return -ENOMEM; 193b8d26b3bSNicholas Bellinger } 194b8d26b3bSNicholas Bellinger 195b8d26b3bSNicholas Bellinger static void 196b8d26b3bSNicholas Bellinger isert_free_rx_descriptors(struct isert_conn *isert_conn) 197b8d26b3bSNicholas Bellinger { 198b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 199b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 200b8d26b3bSNicholas Bellinger int i; 201b8d26b3bSNicholas Bellinger 202b8d26b3bSNicholas Bellinger if (!isert_conn->conn_rx_descs) 203b8d26b3bSNicholas Bellinger return; 204b8d26b3bSNicholas Bellinger 205b8d26b3bSNicholas Bellinger rx_desc = isert_conn->conn_rx_descs; 206b8d26b3bSNicholas Bellinger for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++) { 207b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, rx_desc->dma_addr, 208b8d26b3bSNicholas Bellinger ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); 209b8d26b3bSNicholas Bellinger } 210b8d26b3bSNicholas Bellinger 211b8d26b3bSNicholas Bellinger kfree(isert_conn->conn_rx_descs); 212b8d26b3bSNicholas Bellinger isert_conn->conn_rx_descs = NULL; 213b8d26b3bSNicholas Bellinger } 214b8d26b3bSNicholas Bellinger 2152853c2b6SNicholas Bellinger static void isert_cq_tx_work(struct work_struct *); 216b8d26b3bSNicholas Bellinger static void isert_cq_tx_callback(struct ib_cq *, void *); 2172853c2b6SNicholas Bellinger static void isert_cq_rx_work(struct work_struct *); 218b8d26b3bSNicholas Bellinger static void isert_cq_rx_callback(struct ib_cq *, void *); 219b8d26b3bSNicholas Bellinger 220b8d26b3bSNicholas Bellinger static int 221b8d26b3bSNicholas Bellinger isert_create_device_ib_res(struct isert_device *device) 222b8d26b3bSNicholas Bellinger { 223b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = device->ib_device; 224b8d26b3bSNicholas Bellinger struct isert_cq_desc *cq_desc; 22559464ef4SVu Pham struct ib_device_attr *dev_attr; 226b8d26b3bSNicholas Bellinger int ret = 0, i, j; 227b8d26b3bSNicholas Bellinger 22859464ef4SVu Pham dev_attr = &device->dev_attr; 22959464ef4SVu Pham ret = isert_query_device(ib_dev, dev_attr); 23059464ef4SVu Pham if (ret) 23159464ef4SVu Pham return ret; 23259464ef4SVu Pham 233d40945d8SVu Pham /* asign function handlers */ 23459464ef4SVu Pham if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) { 235a3a5a826SSagi Grimberg device->use_fastreg = 1; 236a3a5a826SSagi Grimberg device->reg_rdma_mem = isert_reg_rdma; 237a3a5a826SSagi Grimberg device->unreg_rdma_mem = isert_unreg_rdma; 23859464ef4SVu Pham } else { 239a3a5a826SSagi Grimberg device->use_fastreg = 0; 240d40945d8SVu Pham device->reg_rdma_mem = isert_map_rdma; 241d40945d8SVu Pham device->unreg_rdma_mem = isert_unmap_cmd; 24259464ef4SVu Pham } 243d40945d8SVu Pham 244d3e125daSSagi Grimberg /* Check signature cap */ 245d3e125daSSagi Grimberg device->pi_capable = dev_attr->device_cap_flags & 246d3e125daSSagi Grimberg IB_DEVICE_SIGNATURE_HANDOVER ? true : false; 247d3e125daSSagi Grimberg 248b8d26b3bSNicholas Bellinger device->cqs_used = min_t(int, num_online_cpus(), 249b8d26b3bSNicholas Bellinger device->ib_device->num_comp_vectors); 250b8d26b3bSNicholas Bellinger device->cqs_used = min(ISERT_MAX_CQ, device->cqs_used); 251a3a5a826SSagi Grimberg pr_debug("Using %d CQs, device %s supports %d vectors support " 252d3e125daSSagi Grimberg "Fast registration %d pi_capable %d\n", 253b8d26b3bSNicholas Bellinger device->cqs_used, device->ib_device->name, 254d3e125daSSagi Grimberg device->ib_device->num_comp_vectors, device->use_fastreg, 255d3e125daSSagi Grimberg device->pi_capable); 256b8d26b3bSNicholas Bellinger device->cq_desc = kzalloc(sizeof(struct isert_cq_desc) * 257b8d26b3bSNicholas Bellinger device->cqs_used, GFP_KERNEL); 258b8d26b3bSNicholas Bellinger if (!device->cq_desc) { 259b8d26b3bSNicholas Bellinger pr_err("Unable to allocate device->cq_desc\n"); 260b8d26b3bSNicholas Bellinger return -ENOMEM; 261b8d26b3bSNicholas Bellinger } 262b8d26b3bSNicholas Bellinger cq_desc = device->cq_desc; 263b8d26b3bSNicholas Bellinger 264b8d26b3bSNicholas Bellinger for (i = 0; i < device->cqs_used; i++) { 265b8d26b3bSNicholas Bellinger cq_desc[i].device = device; 266b8d26b3bSNicholas Bellinger cq_desc[i].cq_index = i; 267b8d26b3bSNicholas Bellinger 2682853c2b6SNicholas Bellinger INIT_WORK(&cq_desc[i].cq_rx_work, isert_cq_rx_work); 269b8d26b3bSNicholas Bellinger device->dev_rx_cq[i] = ib_create_cq(device->ib_device, 270b8d26b3bSNicholas Bellinger isert_cq_rx_callback, 271b8d26b3bSNicholas Bellinger isert_cq_event_callback, 272b8d26b3bSNicholas Bellinger (void *)&cq_desc[i], 273b8d26b3bSNicholas Bellinger ISER_MAX_RX_CQ_LEN, i); 27494a71110SWei Yongjun if (IS_ERR(device->dev_rx_cq[i])) { 27594a71110SWei Yongjun ret = PTR_ERR(device->dev_rx_cq[i]); 27694a71110SWei Yongjun device->dev_rx_cq[i] = NULL; 277b8d26b3bSNicholas Bellinger goto out_cq; 27894a71110SWei Yongjun } 279b8d26b3bSNicholas Bellinger 2802853c2b6SNicholas Bellinger INIT_WORK(&cq_desc[i].cq_tx_work, isert_cq_tx_work); 281b8d26b3bSNicholas Bellinger device->dev_tx_cq[i] = ib_create_cq(device->ib_device, 282b8d26b3bSNicholas Bellinger isert_cq_tx_callback, 283b8d26b3bSNicholas Bellinger isert_cq_event_callback, 284b8d26b3bSNicholas Bellinger (void *)&cq_desc[i], 285b8d26b3bSNicholas Bellinger ISER_MAX_TX_CQ_LEN, i); 28694a71110SWei Yongjun if (IS_ERR(device->dev_tx_cq[i])) { 28794a71110SWei Yongjun ret = PTR_ERR(device->dev_tx_cq[i]); 28894a71110SWei Yongjun device->dev_tx_cq[i] = NULL; 28994a71110SWei Yongjun goto out_cq; 29094a71110SWei Yongjun } 29194a71110SWei Yongjun 29294a71110SWei Yongjun ret = ib_req_notify_cq(device->dev_rx_cq[i], IB_CQ_NEXT_COMP); 29394a71110SWei Yongjun if (ret) 294b8d26b3bSNicholas Bellinger goto out_cq; 295b8d26b3bSNicholas Bellinger 29694a71110SWei Yongjun ret = ib_req_notify_cq(device->dev_tx_cq[i], IB_CQ_NEXT_COMP); 29794a71110SWei Yongjun if (ret) 298b8d26b3bSNicholas Bellinger goto out_cq; 299b8d26b3bSNicholas Bellinger } 300b8d26b3bSNicholas Bellinger 301b8d26b3bSNicholas Bellinger return 0; 302b8d26b3bSNicholas Bellinger 303b8d26b3bSNicholas Bellinger out_cq: 304b8d26b3bSNicholas Bellinger for (j = 0; j < i; j++) { 305b8d26b3bSNicholas Bellinger cq_desc = &device->cq_desc[j]; 306b8d26b3bSNicholas Bellinger 307b8d26b3bSNicholas Bellinger if (device->dev_rx_cq[j]) { 308b8d26b3bSNicholas Bellinger cancel_work_sync(&cq_desc->cq_rx_work); 309b8d26b3bSNicholas Bellinger ib_destroy_cq(device->dev_rx_cq[j]); 310b8d26b3bSNicholas Bellinger } 311b8d26b3bSNicholas Bellinger if (device->dev_tx_cq[j]) { 312b8d26b3bSNicholas Bellinger cancel_work_sync(&cq_desc->cq_tx_work); 313b8d26b3bSNicholas Bellinger ib_destroy_cq(device->dev_tx_cq[j]); 314b8d26b3bSNicholas Bellinger } 315b8d26b3bSNicholas Bellinger } 316b8d26b3bSNicholas Bellinger kfree(device->cq_desc); 317b8d26b3bSNicholas Bellinger 318b8d26b3bSNicholas Bellinger return ret; 319b8d26b3bSNicholas Bellinger } 320b8d26b3bSNicholas Bellinger 321b8d26b3bSNicholas Bellinger static void 322b8d26b3bSNicholas Bellinger isert_free_device_ib_res(struct isert_device *device) 323b8d26b3bSNicholas Bellinger { 324b8d26b3bSNicholas Bellinger struct isert_cq_desc *cq_desc; 325b8d26b3bSNicholas Bellinger int i; 326b8d26b3bSNicholas Bellinger 327b8d26b3bSNicholas Bellinger for (i = 0; i < device->cqs_used; i++) { 328b8d26b3bSNicholas Bellinger cq_desc = &device->cq_desc[i]; 329b8d26b3bSNicholas Bellinger 330b8d26b3bSNicholas Bellinger cancel_work_sync(&cq_desc->cq_rx_work); 331b8d26b3bSNicholas Bellinger cancel_work_sync(&cq_desc->cq_tx_work); 332b8d26b3bSNicholas Bellinger ib_destroy_cq(device->dev_rx_cq[i]); 333b8d26b3bSNicholas Bellinger ib_destroy_cq(device->dev_tx_cq[i]); 334b8d26b3bSNicholas Bellinger device->dev_rx_cq[i] = NULL; 335b8d26b3bSNicholas Bellinger device->dev_tx_cq[i] = NULL; 336b8d26b3bSNicholas Bellinger } 337b8d26b3bSNicholas Bellinger 338b8d26b3bSNicholas Bellinger kfree(device->cq_desc); 339b8d26b3bSNicholas Bellinger } 340b8d26b3bSNicholas Bellinger 341b8d26b3bSNicholas Bellinger static void 342b8d26b3bSNicholas Bellinger isert_device_try_release(struct isert_device *device) 343b8d26b3bSNicholas Bellinger { 344b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 345b8d26b3bSNicholas Bellinger device->refcount--; 346b8d26b3bSNicholas Bellinger if (!device->refcount) { 347b8d26b3bSNicholas Bellinger isert_free_device_ib_res(device); 348b8d26b3bSNicholas Bellinger list_del(&device->dev_node); 349b8d26b3bSNicholas Bellinger kfree(device); 350b8d26b3bSNicholas Bellinger } 351b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 352b8d26b3bSNicholas Bellinger } 353b8d26b3bSNicholas Bellinger 354b8d26b3bSNicholas Bellinger static struct isert_device * 355b8d26b3bSNicholas Bellinger isert_device_find_by_ib_dev(struct rdma_cm_id *cma_id) 356b8d26b3bSNicholas Bellinger { 357b8d26b3bSNicholas Bellinger struct isert_device *device; 358b8d26b3bSNicholas Bellinger int ret; 359b8d26b3bSNicholas Bellinger 360b8d26b3bSNicholas Bellinger mutex_lock(&device_list_mutex); 361b8d26b3bSNicholas Bellinger list_for_each_entry(device, &device_list, dev_node) { 362b8d26b3bSNicholas Bellinger if (device->ib_device->node_guid == cma_id->device->node_guid) { 363b8d26b3bSNicholas Bellinger device->refcount++; 364b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 365b8d26b3bSNicholas Bellinger return device; 366b8d26b3bSNicholas Bellinger } 367b8d26b3bSNicholas Bellinger } 368b8d26b3bSNicholas Bellinger 369b8d26b3bSNicholas Bellinger device = kzalloc(sizeof(struct isert_device), GFP_KERNEL); 370b8d26b3bSNicholas Bellinger if (!device) { 371b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 372b8d26b3bSNicholas Bellinger return ERR_PTR(-ENOMEM); 373b8d26b3bSNicholas Bellinger } 374b8d26b3bSNicholas Bellinger 375b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&device->dev_node); 376b8d26b3bSNicholas Bellinger 377b8d26b3bSNicholas Bellinger device->ib_device = cma_id->device; 378b8d26b3bSNicholas Bellinger ret = isert_create_device_ib_res(device); 379b8d26b3bSNicholas Bellinger if (ret) { 380b8d26b3bSNicholas Bellinger kfree(device); 381b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 382b8d26b3bSNicholas Bellinger return ERR_PTR(ret); 383b8d26b3bSNicholas Bellinger } 384b8d26b3bSNicholas Bellinger 385b8d26b3bSNicholas Bellinger device->refcount++; 386b8d26b3bSNicholas Bellinger list_add_tail(&device->dev_node, &device_list); 387b8d26b3bSNicholas Bellinger mutex_unlock(&device_list_mutex); 388b8d26b3bSNicholas Bellinger 389b8d26b3bSNicholas Bellinger return device; 390b8d26b3bSNicholas Bellinger } 391b8d26b3bSNicholas Bellinger 39259464ef4SVu Pham static void 393a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(struct isert_conn *isert_conn) 39459464ef4SVu Pham { 39559464ef4SVu Pham struct fast_reg_descriptor *fr_desc, *tmp; 39659464ef4SVu Pham int i = 0; 39759464ef4SVu Pham 398a3a5a826SSagi Grimberg if (list_empty(&isert_conn->conn_fr_pool)) 39959464ef4SVu Pham return; 40059464ef4SVu Pham 401a3a5a826SSagi Grimberg pr_debug("Freeing conn %p fastreg pool", isert_conn); 40259464ef4SVu Pham 40359464ef4SVu Pham list_for_each_entry_safe(fr_desc, tmp, 404a3a5a826SSagi Grimberg &isert_conn->conn_fr_pool, list) { 40559464ef4SVu Pham list_del(&fr_desc->list); 40659464ef4SVu Pham ib_free_fast_reg_page_list(fr_desc->data_frpl); 40759464ef4SVu Pham ib_dereg_mr(fr_desc->data_mr); 408d3e125daSSagi Grimberg if (fr_desc->pi_ctx) { 409d3e125daSSagi Grimberg ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl); 410d3e125daSSagi Grimberg ib_dereg_mr(fr_desc->pi_ctx->prot_mr); 411d3e125daSSagi Grimberg ib_destroy_mr(fr_desc->pi_ctx->sig_mr); 412d3e125daSSagi Grimberg kfree(fr_desc->pi_ctx); 413d3e125daSSagi Grimberg } 41459464ef4SVu Pham kfree(fr_desc); 41559464ef4SVu Pham ++i; 41659464ef4SVu Pham } 41759464ef4SVu Pham 418a3a5a826SSagi Grimberg if (i < isert_conn->conn_fr_pool_size) 41959464ef4SVu Pham pr_warn("Pool still has %d regions registered\n", 420a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size - i); 42159464ef4SVu Pham } 42259464ef4SVu Pham 42359464ef4SVu Pham static int 424dc87a90fSSagi Grimberg isert_create_fr_desc(struct ib_device *ib_device, struct ib_pd *pd, 425d3e125daSSagi Grimberg struct fast_reg_descriptor *fr_desc, u8 protection) 426dc87a90fSSagi Grimberg { 427d3e125daSSagi Grimberg int ret; 428d3e125daSSagi Grimberg 429dc87a90fSSagi Grimberg fr_desc->data_frpl = ib_alloc_fast_reg_page_list(ib_device, 430dc87a90fSSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 431dc87a90fSSagi Grimberg if (IS_ERR(fr_desc->data_frpl)) { 432dc87a90fSSagi Grimberg pr_err("Failed to allocate data frpl err=%ld\n", 433dc87a90fSSagi Grimberg PTR_ERR(fr_desc->data_frpl)); 434dc87a90fSSagi Grimberg return PTR_ERR(fr_desc->data_frpl); 435dc87a90fSSagi Grimberg } 436dc87a90fSSagi Grimberg 437dc87a90fSSagi Grimberg fr_desc->data_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); 438dc87a90fSSagi Grimberg if (IS_ERR(fr_desc->data_mr)) { 439dc87a90fSSagi Grimberg pr_err("Failed to allocate data frmr err=%ld\n", 440dc87a90fSSagi Grimberg PTR_ERR(fr_desc->data_mr)); 441d3e125daSSagi Grimberg ret = PTR_ERR(fr_desc->data_mr); 442d3e125daSSagi Grimberg goto err_data_frpl; 443dc87a90fSSagi Grimberg } 444dc87a90fSSagi Grimberg pr_debug("Create fr_desc %p page_list %p\n", 445dc87a90fSSagi Grimberg fr_desc, fr_desc->data_frpl->page_list); 446d3e125daSSagi Grimberg fr_desc->ind |= ISERT_DATA_KEY_VALID; 447dc87a90fSSagi Grimberg 448d3e125daSSagi Grimberg if (protection) { 449d3e125daSSagi Grimberg struct ib_mr_init_attr mr_init_attr = {0}; 450d3e125daSSagi Grimberg struct pi_context *pi_ctx; 451d3e125daSSagi Grimberg 452d3e125daSSagi Grimberg fr_desc->pi_ctx = kzalloc(sizeof(*fr_desc->pi_ctx), GFP_KERNEL); 453d3e125daSSagi Grimberg if (!fr_desc->pi_ctx) { 454d3e125daSSagi Grimberg pr_err("Failed to allocate pi context\n"); 455d3e125daSSagi Grimberg ret = -ENOMEM; 456d3e125daSSagi Grimberg goto err_data_mr; 457d3e125daSSagi Grimberg } 458d3e125daSSagi Grimberg pi_ctx = fr_desc->pi_ctx; 459d3e125daSSagi Grimberg 460d3e125daSSagi Grimberg pi_ctx->prot_frpl = ib_alloc_fast_reg_page_list(ib_device, 461d3e125daSSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 462d3e125daSSagi Grimberg if (IS_ERR(pi_ctx->prot_frpl)) { 463d3e125daSSagi Grimberg pr_err("Failed to allocate prot frpl err=%ld\n", 464d3e125daSSagi Grimberg PTR_ERR(pi_ctx->prot_frpl)); 465d3e125daSSagi Grimberg ret = PTR_ERR(pi_ctx->prot_frpl); 466d3e125daSSagi Grimberg goto err_pi_ctx; 467d3e125daSSagi Grimberg } 468d3e125daSSagi Grimberg 469d3e125daSSagi Grimberg pi_ctx->prot_mr = ib_alloc_fast_reg_mr(pd, ISCSI_ISER_SG_TABLESIZE); 470d3e125daSSagi Grimberg if (IS_ERR(pi_ctx->prot_mr)) { 471d3e125daSSagi Grimberg pr_err("Failed to allocate prot frmr err=%ld\n", 472d3e125daSSagi Grimberg PTR_ERR(pi_ctx->prot_mr)); 473d3e125daSSagi Grimberg ret = PTR_ERR(pi_ctx->prot_mr); 474d3e125daSSagi Grimberg goto err_prot_frpl; 475d3e125daSSagi Grimberg } 476d3e125daSSagi Grimberg fr_desc->ind |= ISERT_PROT_KEY_VALID; 477d3e125daSSagi Grimberg 478d3e125daSSagi Grimberg mr_init_attr.max_reg_descriptors = 2; 479d3e125daSSagi Grimberg mr_init_attr.flags |= IB_MR_SIGNATURE_EN; 480d3e125daSSagi Grimberg pi_ctx->sig_mr = ib_create_mr(pd, &mr_init_attr); 481d3e125daSSagi Grimberg if (IS_ERR(pi_ctx->sig_mr)) { 482d3e125daSSagi Grimberg pr_err("Failed to allocate signature enabled mr err=%ld\n", 483d3e125daSSagi Grimberg PTR_ERR(pi_ctx->sig_mr)); 484d3e125daSSagi Grimberg ret = PTR_ERR(pi_ctx->sig_mr); 485d3e125daSSagi Grimberg goto err_prot_mr; 486d3e125daSSagi Grimberg } 487d3e125daSSagi Grimberg fr_desc->ind |= ISERT_SIG_KEY_VALID; 488d3e125daSSagi Grimberg } 489d3e125daSSagi Grimberg fr_desc->ind &= ~ISERT_PROTECTED; 490dc87a90fSSagi Grimberg 491dc87a90fSSagi Grimberg return 0; 492d3e125daSSagi Grimberg err_prot_mr: 493d3e125daSSagi Grimberg ib_dereg_mr(fr_desc->pi_ctx->prot_mr); 494d3e125daSSagi Grimberg err_prot_frpl: 495d3e125daSSagi Grimberg ib_free_fast_reg_page_list(fr_desc->pi_ctx->prot_frpl); 496d3e125daSSagi Grimberg err_pi_ctx: 497d3e125daSSagi Grimberg kfree(fr_desc->pi_ctx); 498d3e125daSSagi Grimberg err_data_mr: 499d3e125daSSagi Grimberg ib_dereg_mr(fr_desc->data_mr); 500d3e125daSSagi Grimberg err_data_frpl: 501d3e125daSSagi Grimberg ib_free_fast_reg_page_list(fr_desc->data_frpl); 502d3e125daSSagi Grimberg 503d3e125daSSagi Grimberg return ret; 504dc87a90fSSagi Grimberg } 505dc87a90fSSagi Grimberg 506dc87a90fSSagi Grimberg static int 507d3e125daSSagi Grimberg isert_conn_create_fastreg_pool(struct isert_conn *isert_conn, u8 pi_support) 50859464ef4SVu Pham { 50959464ef4SVu Pham struct fast_reg_descriptor *fr_desc; 51059464ef4SVu Pham struct isert_device *device = isert_conn->conn_device; 51159464ef4SVu Pham int i, ret; 51259464ef4SVu Pham 513a3a5a826SSagi Grimberg INIT_LIST_HEAD(&isert_conn->conn_fr_pool); 514a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size = 0; 51559464ef4SVu Pham for (i = 0; i < ISCSI_DEF_XMIT_CMDS_MAX; i++) { 51659464ef4SVu Pham fr_desc = kzalloc(sizeof(*fr_desc), GFP_KERNEL); 51759464ef4SVu Pham if (!fr_desc) { 51859464ef4SVu Pham pr_err("Failed to allocate fast_reg descriptor\n"); 51959464ef4SVu Pham ret = -ENOMEM; 52059464ef4SVu Pham goto err; 52159464ef4SVu Pham } 52259464ef4SVu Pham 523dc87a90fSSagi Grimberg ret = isert_create_fr_desc(device->ib_device, 524d3e125daSSagi Grimberg isert_conn->conn_pd, fr_desc, 525d3e125daSSagi Grimberg pi_support); 526dc87a90fSSagi Grimberg if (ret) { 527dc87a90fSSagi Grimberg pr_err("Failed to create fastreg descriptor err=%d\n", 528dc87a90fSSagi Grimberg ret); 529a80e21b3SNicholas Bellinger kfree(fr_desc); 53059464ef4SVu Pham goto err; 53159464ef4SVu Pham } 53259464ef4SVu Pham 533a3a5a826SSagi Grimberg list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); 534a3a5a826SSagi Grimberg isert_conn->conn_fr_pool_size++; 53559464ef4SVu Pham } 53659464ef4SVu Pham 537a3a5a826SSagi Grimberg pr_debug("Creating conn %p fastreg pool size=%d", 538a3a5a826SSagi Grimberg isert_conn, isert_conn->conn_fr_pool_size); 53959464ef4SVu Pham 54059464ef4SVu Pham return 0; 54159464ef4SVu Pham 54259464ef4SVu Pham err: 543a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(isert_conn); 54459464ef4SVu Pham return ret; 54559464ef4SVu Pham } 54659464ef4SVu Pham 547b8d26b3bSNicholas Bellinger static int 548b8d26b3bSNicholas Bellinger isert_connect_request(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) 549b8d26b3bSNicholas Bellinger { 550b8d26b3bSNicholas Bellinger struct iscsi_np *np = cma_id->context; 551b8d26b3bSNicholas Bellinger struct isert_np *isert_np = np->np_context; 552b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 553b8d26b3bSNicholas Bellinger struct isert_device *device; 554b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = cma_id->device; 555b8d26b3bSNicholas Bellinger int ret = 0; 556d3e125daSSagi Grimberg u8 pi_support = np->tpg_np->tpg->tpg_attrib.t10_pi; 557b8d26b3bSNicholas Bellinger 558b8d26b3bSNicholas Bellinger pr_debug("Entering isert_connect_request cma_id: %p, context: %p\n", 559b8d26b3bSNicholas Bellinger cma_id, cma_id->context); 560b8d26b3bSNicholas Bellinger 561b8d26b3bSNicholas Bellinger isert_conn = kzalloc(sizeof(struct isert_conn), GFP_KERNEL); 562b8d26b3bSNicholas Bellinger if (!isert_conn) { 563b8d26b3bSNicholas Bellinger pr_err("Unable to allocate isert_conn\n"); 564b8d26b3bSNicholas Bellinger return -ENOMEM; 565b8d26b3bSNicholas Bellinger } 566b8d26b3bSNicholas Bellinger isert_conn->state = ISER_CONN_INIT; 567b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&isert_conn->conn_accept_node); 568b8d26b3bSNicholas Bellinger init_completion(&isert_conn->conn_login_comp); 569defd8848SNicholas Bellinger init_completion(&isert_conn->conn_wait); 570defd8848SNicholas Bellinger init_completion(&isert_conn->conn_wait_comp_err); 571b8d26b3bSNicholas Bellinger kref_init(&isert_conn->conn_kref); 572b8d26b3bSNicholas Bellinger kref_get(&isert_conn->conn_kref); 573b2cb9649SNicholas Bellinger mutex_init(&isert_conn->conn_mutex); 57459464ef4SVu Pham spin_lock_init(&isert_conn->conn_lock); 575b8d26b3bSNicholas Bellinger 576b8d26b3bSNicholas Bellinger cma_id->context = isert_conn; 577b8d26b3bSNicholas Bellinger isert_conn->conn_cm_id = cma_id; 578b8d26b3bSNicholas Bellinger isert_conn->responder_resources = event->param.conn.responder_resources; 579b8d26b3bSNicholas Bellinger isert_conn->initiator_depth = event->param.conn.initiator_depth; 580b8d26b3bSNicholas Bellinger pr_debug("Using responder_resources: %u initiator_depth: %u\n", 581b8d26b3bSNicholas Bellinger isert_conn->responder_resources, isert_conn->initiator_depth); 582b8d26b3bSNicholas Bellinger 583b8d26b3bSNicholas Bellinger isert_conn->login_buf = kzalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + 584b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, GFP_KERNEL); 585b8d26b3bSNicholas Bellinger if (!isert_conn->login_buf) { 586b8d26b3bSNicholas Bellinger pr_err("Unable to allocate isert_conn->login_buf\n"); 587b8d26b3bSNicholas Bellinger ret = -ENOMEM; 588b8d26b3bSNicholas Bellinger goto out; 589b8d26b3bSNicholas Bellinger } 590b8d26b3bSNicholas Bellinger 591b8d26b3bSNicholas Bellinger isert_conn->login_req_buf = isert_conn->login_buf; 592b8d26b3bSNicholas Bellinger isert_conn->login_rsp_buf = isert_conn->login_buf + 593b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN; 594b8d26b3bSNicholas Bellinger pr_debug("Set login_buf: %p login_req_buf: %p login_rsp_buf: %p\n", 595b8d26b3bSNicholas Bellinger isert_conn->login_buf, isert_conn->login_req_buf, 596b8d26b3bSNicholas Bellinger isert_conn->login_rsp_buf); 597b8d26b3bSNicholas Bellinger 598b8d26b3bSNicholas Bellinger isert_conn->login_req_dma = ib_dma_map_single(ib_dev, 599b8d26b3bSNicholas Bellinger (void *)isert_conn->login_req_buf, 600b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); 601b8d26b3bSNicholas Bellinger 602b8d26b3bSNicholas Bellinger ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma); 603b8d26b3bSNicholas Bellinger if (ret) { 604b8d26b3bSNicholas Bellinger pr_err("ib_dma_mapping_error failed for login_req_dma: %d\n", 605b8d26b3bSNicholas Bellinger ret); 606b8d26b3bSNicholas Bellinger isert_conn->login_req_dma = 0; 607b8d26b3bSNicholas Bellinger goto out_login_buf; 608b8d26b3bSNicholas Bellinger } 609b8d26b3bSNicholas Bellinger 610b8d26b3bSNicholas Bellinger isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev, 611b8d26b3bSNicholas Bellinger (void *)isert_conn->login_rsp_buf, 612b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 613b8d26b3bSNicholas Bellinger 614b8d26b3bSNicholas Bellinger ret = ib_dma_mapping_error(ib_dev, isert_conn->login_rsp_dma); 615b8d26b3bSNicholas Bellinger if (ret) { 616b8d26b3bSNicholas Bellinger pr_err("ib_dma_mapping_error failed for login_rsp_dma: %d\n", 617b8d26b3bSNicholas Bellinger ret); 618b8d26b3bSNicholas Bellinger isert_conn->login_rsp_dma = 0; 619b8d26b3bSNicholas Bellinger goto out_req_dma_map; 620b8d26b3bSNicholas Bellinger } 621b8d26b3bSNicholas Bellinger 622b8d26b3bSNicholas Bellinger device = isert_device_find_by_ib_dev(cma_id); 623b8d26b3bSNicholas Bellinger if (IS_ERR(device)) { 624b8d26b3bSNicholas Bellinger ret = PTR_ERR(device); 625b8d26b3bSNicholas Bellinger goto out_rsp_dma_map; 626b8d26b3bSNicholas Bellinger } 627b8d26b3bSNicholas Bellinger 628b8d26b3bSNicholas Bellinger isert_conn->conn_device = device; 629eb6ab132SSagi Grimberg isert_conn->conn_pd = ib_alloc_pd(isert_conn->conn_device->ib_device); 630eb6ab132SSagi Grimberg if (IS_ERR(isert_conn->conn_pd)) { 631eb6ab132SSagi Grimberg ret = PTR_ERR(isert_conn->conn_pd); 632eb6ab132SSagi Grimberg pr_err("ib_alloc_pd failed for conn %p: ret=%d\n", 633eb6ab132SSagi Grimberg isert_conn, ret); 634eb6ab132SSagi Grimberg goto out_pd; 635eb6ab132SSagi Grimberg } 636b8d26b3bSNicholas Bellinger 637eb6ab132SSagi Grimberg isert_conn->conn_mr = ib_get_dma_mr(isert_conn->conn_pd, 638eb6ab132SSagi Grimberg IB_ACCESS_LOCAL_WRITE); 639eb6ab132SSagi Grimberg if (IS_ERR(isert_conn->conn_mr)) { 640eb6ab132SSagi Grimberg ret = PTR_ERR(isert_conn->conn_mr); 641eb6ab132SSagi Grimberg pr_err("ib_get_dma_mr failed for conn %p: ret=%d\n", 642eb6ab132SSagi Grimberg isert_conn, ret); 643eb6ab132SSagi Grimberg goto out_mr; 644eb6ab132SSagi Grimberg } 645b8d26b3bSNicholas Bellinger 646d3e125daSSagi Grimberg if (pi_support && !device->pi_capable) { 647d3e125daSSagi Grimberg pr_err("Protection information requested but not supported\n"); 648d3e125daSSagi Grimberg ret = -EINVAL; 649d3e125daSSagi Grimberg goto out_mr; 650d3e125daSSagi Grimberg } 651d3e125daSSagi Grimberg 652a3a5a826SSagi Grimberg if (device->use_fastreg) { 653d3e125daSSagi Grimberg ret = isert_conn_create_fastreg_pool(isert_conn, pi_support); 65459464ef4SVu Pham if (ret) { 655a3a5a826SSagi Grimberg pr_err("Conn: %p failed to create fastreg pool\n", 656a3a5a826SSagi Grimberg isert_conn); 657a3a5a826SSagi Grimberg goto out_fastreg; 65859464ef4SVu Pham } 65959464ef4SVu Pham } 66059464ef4SVu Pham 661d3e125daSSagi Grimberg ret = isert_conn_setup_qp(isert_conn, cma_id, pi_support); 662b8d26b3bSNicholas Bellinger if (ret) 663b8d26b3bSNicholas Bellinger goto out_conn_dev; 664b8d26b3bSNicholas Bellinger 665b8d26b3bSNicholas Bellinger mutex_lock(&isert_np->np_accept_mutex); 666b8d26b3bSNicholas Bellinger list_add_tail(&isert_np->np_accept_list, &isert_conn->conn_accept_node); 667b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 668b8d26b3bSNicholas Bellinger 669b8d26b3bSNicholas Bellinger pr_debug("isert_connect_request() waking up np_accept_wq: %p\n", np); 670b8d26b3bSNicholas Bellinger wake_up(&isert_np->np_accept_wq); 671b8d26b3bSNicholas Bellinger return 0; 672b8d26b3bSNicholas Bellinger 673b8d26b3bSNicholas Bellinger out_conn_dev: 674a3a5a826SSagi Grimberg if (device->use_fastreg) 675a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(isert_conn); 676a3a5a826SSagi Grimberg out_fastreg: 677eb6ab132SSagi Grimberg ib_dereg_mr(isert_conn->conn_mr); 678eb6ab132SSagi Grimberg out_mr: 679eb6ab132SSagi Grimberg ib_dealloc_pd(isert_conn->conn_pd); 680eb6ab132SSagi Grimberg out_pd: 681b8d26b3bSNicholas Bellinger isert_device_try_release(device); 682b8d26b3bSNicholas Bellinger out_rsp_dma_map: 683b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, 684b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 685b8d26b3bSNicholas Bellinger out_req_dma_map: 686b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, 687b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_FROM_DEVICE); 688b8d26b3bSNicholas Bellinger out_login_buf: 689b8d26b3bSNicholas Bellinger kfree(isert_conn->login_buf); 690b8d26b3bSNicholas Bellinger out: 691b8d26b3bSNicholas Bellinger kfree(isert_conn); 692b8d26b3bSNicholas Bellinger return ret; 693b8d26b3bSNicholas Bellinger } 694b8d26b3bSNicholas Bellinger 695b8d26b3bSNicholas Bellinger static void 696b8d26b3bSNicholas Bellinger isert_connect_release(struct isert_conn *isert_conn) 697b8d26b3bSNicholas Bellinger { 698b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 699b8d26b3bSNicholas Bellinger struct isert_device *device = isert_conn->conn_device; 700b8d26b3bSNicholas Bellinger int cq_index; 701b8d26b3bSNicholas Bellinger 702b8d26b3bSNicholas Bellinger pr_debug("Entering isert_connect_release(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); 703b8d26b3bSNicholas Bellinger 704a3a5a826SSagi Grimberg if (device && device->use_fastreg) 705a3a5a826SSagi Grimberg isert_conn_free_fastreg_pool(isert_conn); 70659464ef4SVu Pham 707b8d26b3bSNicholas Bellinger if (isert_conn->conn_qp) { 708b8d26b3bSNicholas Bellinger cq_index = ((struct isert_cq_desc *) 709b8d26b3bSNicholas Bellinger isert_conn->conn_qp->recv_cq->cq_context)->cq_index; 710b8d26b3bSNicholas Bellinger pr_debug("isert_connect_release: cq_index: %d\n", cq_index); 711b8d26b3bSNicholas Bellinger isert_conn->conn_device->cq_active_qps[cq_index]--; 712b8d26b3bSNicholas Bellinger 713b8d26b3bSNicholas Bellinger rdma_destroy_qp(isert_conn->conn_cm_id); 714b8d26b3bSNicholas Bellinger } 715b8d26b3bSNicholas Bellinger 716b8d26b3bSNicholas Bellinger isert_free_rx_descriptors(isert_conn); 717b8d26b3bSNicholas Bellinger rdma_destroy_id(isert_conn->conn_cm_id); 718b8d26b3bSNicholas Bellinger 719eb6ab132SSagi Grimberg ib_dereg_mr(isert_conn->conn_mr); 720eb6ab132SSagi Grimberg ib_dealloc_pd(isert_conn->conn_pd); 721eb6ab132SSagi Grimberg 722b8d26b3bSNicholas Bellinger if (isert_conn->login_buf) { 723b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_rsp_dma, 724b8d26b3bSNicholas Bellinger ISER_RX_LOGIN_SIZE, DMA_TO_DEVICE); 725b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma, 726b8d26b3bSNicholas Bellinger ISCSI_DEF_MAX_RECV_SEG_LEN, 727b8d26b3bSNicholas Bellinger DMA_FROM_DEVICE); 728b8d26b3bSNicholas Bellinger kfree(isert_conn->login_buf); 729b8d26b3bSNicholas Bellinger } 730b8d26b3bSNicholas Bellinger kfree(isert_conn); 731b8d26b3bSNicholas Bellinger 732b8d26b3bSNicholas Bellinger if (device) 733b8d26b3bSNicholas Bellinger isert_device_try_release(device); 734b8d26b3bSNicholas Bellinger 735b8d26b3bSNicholas Bellinger pr_debug("Leaving isert_connect_release >>>>>>>>>>>>\n"); 736b8d26b3bSNicholas Bellinger } 737b8d26b3bSNicholas Bellinger 738b8d26b3bSNicholas Bellinger static void 739b8d26b3bSNicholas Bellinger isert_connected_handler(struct rdma_cm_id *cma_id) 740b8d26b3bSNicholas Bellinger { 741b8d26b3bSNicholas Bellinger return; 742b8d26b3bSNicholas Bellinger } 743b8d26b3bSNicholas Bellinger 744b8d26b3bSNicholas Bellinger static void 745b8d26b3bSNicholas Bellinger isert_release_conn_kref(struct kref *kref) 746b8d26b3bSNicholas Bellinger { 747b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = container_of(kref, 748b8d26b3bSNicholas Bellinger struct isert_conn, conn_kref); 749b8d26b3bSNicholas Bellinger 750b8d26b3bSNicholas Bellinger pr_debug("Calling isert_connect_release for final kref %s/%d\n", 751b8d26b3bSNicholas Bellinger current->comm, current->pid); 752b8d26b3bSNicholas Bellinger 753b8d26b3bSNicholas Bellinger isert_connect_release(isert_conn); 754b8d26b3bSNicholas Bellinger } 755b8d26b3bSNicholas Bellinger 756b8d26b3bSNicholas Bellinger static void 757b8d26b3bSNicholas Bellinger isert_put_conn(struct isert_conn *isert_conn) 758b8d26b3bSNicholas Bellinger { 759b8d26b3bSNicholas Bellinger kref_put(&isert_conn->conn_kref, isert_release_conn_kref); 760b8d26b3bSNicholas Bellinger } 761b8d26b3bSNicholas Bellinger 762b8d26b3bSNicholas Bellinger static void 763b8d26b3bSNicholas Bellinger isert_disconnect_work(struct work_struct *work) 764b8d26b3bSNicholas Bellinger { 765b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = container_of(work, 766b8d26b3bSNicholas Bellinger struct isert_conn, conn_logout_work); 767b8d26b3bSNicholas Bellinger 768b8d26b3bSNicholas Bellinger pr_debug("isert_disconnect_work(): >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"); 769b2cb9649SNicholas Bellinger mutex_lock(&isert_conn->conn_mutex); 770defd8848SNicholas Bellinger if (isert_conn->state == ISER_CONN_UP) 771defd8848SNicholas Bellinger isert_conn->state = ISER_CONN_TERMINATING; 772b8d26b3bSNicholas Bellinger 773b8d26b3bSNicholas Bellinger if (isert_conn->post_recv_buf_count == 0 && 774b8d26b3bSNicholas Bellinger atomic_read(&isert_conn->post_send_buf_count) == 0) { 775b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 776b2cb9649SNicholas Bellinger goto wake_up; 777b8d26b3bSNicholas Bellinger } 778b2cb9649SNicholas Bellinger if (!isert_conn->conn_cm_id) { 779b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 780b2cb9649SNicholas Bellinger isert_put_conn(isert_conn); 781b2cb9649SNicholas Bellinger return; 782b2cb9649SNicholas Bellinger } 783b2cb9649SNicholas Bellinger if (!isert_conn->logout_posted) { 784b2cb9649SNicholas Bellinger pr_debug("Calling rdma_disconnect for !logout_posted from" 785b2cb9649SNicholas Bellinger " isert_disconnect_work\n"); 786b2cb9649SNicholas Bellinger rdma_disconnect(isert_conn->conn_cm_id); 787b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 788b2cb9649SNicholas Bellinger iscsit_cause_connection_reinstatement(isert_conn->conn, 0); 789b2cb9649SNicholas Bellinger goto wake_up; 790b2cb9649SNicholas Bellinger } 791b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 792b8d26b3bSNicholas Bellinger 793b2cb9649SNicholas Bellinger wake_up: 794defd8848SNicholas Bellinger complete(&isert_conn->conn_wait); 795b8d26b3bSNicholas Bellinger isert_put_conn(isert_conn); 796b8d26b3bSNicholas Bellinger } 797b8d26b3bSNicholas Bellinger 798b8d26b3bSNicholas Bellinger static void 799b8d26b3bSNicholas Bellinger isert_disconnected_handler(struct rdma_cm_id *cma_id) 800b8d26b3bSNicholas Bellinger { 801b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)cma_id->context; 802b8d26b3bSNicholas Bellinger 803b8d26b3bSNicholas Bellinger INIT_WORK(&isert_conn->conn_logout_work, isert_disconnect_work); 804b8d26b3bSNicholas Bellinger schedule_work(&isert_conn->conn_logout_work); 805b8d26b3bSNicholas Bellinger } 806b8d26b3bSNicholas Bellinger 807b8d26b3bSNicholas Bellinger static int 808b8d26b3bSNicholas Bellinger isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event) 809b8d26b3bSNicholas Bellinger { 810b8d26b3bSNicholas Bellinger int ret = 0; 811b8d26b3bSNicholas Bellinger 812b8d26b3bSNicholas Bellinger pr_debug("isert_cma_handler: event %d status %d conn %p id %p\n", 813b8d26b3bSNicholas Bellinger event->event, event->status, cma_id->context, cma_id); 814b8d26b3bSNicholas Bellinger 815b8d26b3bSNicholas Bellinger switch (event->event) { 816b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_CONNECT_REQUEST: 817b8d26b3bSNicholas Bellinger pr_debug("RDMA_CM_EVENT_CONNECT_REQUEST: >>>>>>>>>>>>>>>\n"); 818b8d26b3bSNicholas Bellinger ret = isert_connect_request(cma_id, event); 819b8d26b3bSNicholas Bellinger break; 820b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_ESTABLISHED: 821b8d26b3bSNicholas Bellinger pr_debug("RDMA_CM_EVENT_ESTABLISHED >>>>>>>>>>>>>>\n"); 822b8d26b3bSNicholas Bellinger isert_connected_handler(cma_id); 823b8d26b3bSNicholas Bellinger break; 824b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_DISCONNECTED: 825b8d26b3bSNicholas Bellinger pr_debug("RDMA_CM_EVENT_DISCONNECTED: >>>>>>>>>>>>>>\n"); 826b8d26b3bSNicholas Bellinger isert_disconnected_handler(cma_id); 827b8d26b3bSNicholas Bellinger break; 828b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_DEVICE_REMOVAL: 829b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_ADDR_CHANGE: 830b8d26b3bSNicholas Bellinger break; 831b8d26b3bSNicholas Bellinger case RDMA_CM_EVENT_CONNECT_ERROR: 832b8d26b3bSNicholas Bellinger default: 833b8d26b3bSNicholas Bellinger pr_err("Unknown RDMA CMA event: %d\n", event->event); 834b8d26b3bSNicholas Bellinger break; 835b8d26b3bSNicholas Bellinger } 836b8d26b3bSNicholas Bellinger 837b8d26b3bSNicholas Bellinger if (ret != 0) { 838b8d26b3bSNicholas Bellinger pr_err("isert_cma_handler failed RDMA_CM_EVENT: 0x%08x %d\n", 839b8d26b3bSNicholas Bellinger event->event, ret); 840b8d26b3bSNicholas Bellinger dump_stack(); 841b8d26b3bSNicholas Bellinger } 842b8d26b3bSNicholas Bellinger 843b8d26b3bSNicholas Bellinger return ret; 844b8d26b3bSNicholas Bellinger } 845b8d26b3bSNicholas Bellinger 846b8d26b3bSNicholas Bellinger static int 847b8d26b3bSNicholas Bellinger isert_post_recv(struct isert_conn *isert_conn, u32 count) 848b8d26b3bSNicholas Bellinger { 849b8d26b3bSNicholas Bellinger struct ib_recv_wr *rx_wr, *rx_wr_failed; 850b8d26b3bSNicholas Bellinger int i, ret; 851b8d26b3bSNicholas Bellinger unsigned int rx_head = isert_conn->conn_rx_desc_head; 852b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 853b8d26b3bSNicholas Bellinger 854b8d26b3bSNicholas Bellinger for (rx_wr = isert_conn->conn_rx_wr, i = 0; i < count; i++, rx_wr++) { 855b8d26b3bSNicholas Bellinger rx_desc = &isert_conn->conn_rx_descs[rx_head]; 856b8d26b3bSNicholas Bellinger rx_wr->wr_id = (unsigned long)rx_desc; 857b8d26b3bSNicholas Bellinger rx_wr->sg_list = &rx_desc->rx_sg; 858b8d26b3bSNicholas Bellinger rx_wr->num_sge = 1; 859b8d26b3bSNicholas Bellinger rx_wr->next = rx_wr + 1; 860b8d26b3bSNicholas Bellinger rx_head = (rx_head + 1) & (ISERT_QP_MAX_RECV_DTOS - 1); 861b8d26b3bSNicholas Bellinger } 862b8d26b3bSNicholas Bellinger 863b8d26b3bSNicholas Bellinger rx_wr--; 864b8d26b3bSNicholas Bellinger rx_wr->next = NULL; /* mark end of work requests list */ 865b8d26b3bSNicholas Bellinger 866b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count += count; 867b8d26b3bSNicholas Bellinger ret = ib_post_recv(isert_conn->conn_qp, isert_conn->conn_rx_wr, 868b8d26b3bSNicholas Bellinger &rx_wr_failed); 869b8d26b3bSNicholas Bellinger if (ret) { 870b8d26b3bSNicholas Bellinger pr_err("ib_post_recv() failed with ret: %d\n", ret); 871b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count -= count; 872b8d26b3bSNicholas Bellinger } else { 873b8d26b3bSNicholas Bellinger pr_debug("isert_post_recv(): Posted %d RX buffers\n", count); 874b8d26b3bSNicholas Bellinger isert_conn->conn_rx_desc_head = rx_head; 875b8d26b3bSNicholas Bellinger } 876b8d26b3bSNicholas Bellinger return ret; 877b8d26b3bSNicholas Bellinger } 878b8d26b3bSNicholas Bellinger 879b8d26b3bSNicholas Bellinger static int 880b8d26b3bSNicholas Bellinger isert_post_send(struct isert_conn *isert_conn, struct iser_tx_desc *tx_desc) 881b8d26b3bSNicholas Bellinger { 882b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 883b8d26b3bSNicholas Bellinger struct ib_send_wr send_wr, *send_wr_failed; 884b8d26b3bSNicholas Bellinger int ret; 885b8d26b3bSNicholas Bellinger 886b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, tx_desc->dma_addr, 887b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 888b8d26b3bSNicholas Bellinger 889b8d26b3bSNicholas Bellinger send_wr.next = NULL; 890b8d26b3bSNicholas Bellinger send_wr.wr_id = (unsigned long)tx_desc; 891b8d26b3bSNicholas Bellinger send_wr.sg_list = tx_desc->tx_sg; 892b8d26b3bSNicholas Bellinger send_wr.num_sge = tx_desc->num_sge; 893b8d26b3bSNicholas Bellinger send_wr.opcode = IB_WR_SEND; 894b8d26b3bSNicholas Bellinger send_wr.send_flags = IB_SEND_SIGNALED; 895b8d26b3bSNicholas Bellinger 896b8d26b3bSNicholas Bellinger atomic_inc(&isert_conn->post_send_buf_count); 897b8d26b3bSNicholas Bellinger 898b8d26b3bSNicholas Bellinger ret = ib_post_send(isert_conn->conn_qp, &send_wr, &send_wr_failed); 899b8d26b3bSNicholas Bellinger if (ret) { 900b8d26b3bSNicholas Bellinger pr_err("ib_post_send() failed, ret: %d\n", ret); 901b8d26b3bSNicholas Bellinger atomic_dec(&isert_conn->post_send_buf_count); 902b8d26b3bSNicholas Bellinger } 903b8d26b3bSNicholas Bellinger 904b8d26b3bSNicholas Bellinger return ret; 905b8d26b3bSNicholas Bellinger } 906b8d26b3bSNicholas Bellinger 907b8d26b3bSNicholas Bellinger static void 908b8d26b3bSNicholas Bellinger isert_create_send_desc(struct isert_conn *isert_conn, 909b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd, 910b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc) 911b8d26b3bSNicholas Bellinger { 912b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 913b8d26b3bSNicholas Bellinger 914b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr, 915b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 916b8d26b3bSNicholas Bellinger 917b8d26b3bSNicholas Bellinger memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); 918b8d26b3bSNicholas Bellinger tx_desc->iser_header.flags = ISER_VER; 919b8d26b3bSNicholas Bellinger 920b8d26b3bSNicholas Bellinger tx_desc->num_sge = 1; 921b8d26b3bSNicholas Bellinger tx_desc->isert_cmd = isert_cmd; 922b8d26b3bSNicholas Bellinger 923b8d26b3bSNicholas Bellinger if (tx_desc->tx_sg[0].lkey != isert_conn->conn_mr->lkey) { 924b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey; 925b8d26b3bSNicholas Bellinger pr_debug("tx_desc %p lkey mismatch, fixing\n", tx_desc); 926b8d26b3bSNicholas Bellinger } 927b8d26b3bSNicholas Bellinger } 928b8d26b3bSNicholas Bellinger 929b8d26b3bSNicholas Bellinger static int 930b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(struct isert_conn *isert_conn, 931b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc) 932b8d26b3bSNicholas Bellinger { 933b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 934b8d26b3bSNicholas Bellinger u64 dma_addr; 935b8d26b3bSNicholas Bellinger 936b8d26b3bSNicholas Bellinger dma_addr = ib_dma_map_single(ib_dev, (void *)tx_desc, 937b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 938b8d26b3bSNicholas Bellinger if (ib_dma_mapping_error(ib_dev, dma_addr)) { 939b8d26b3bSNicholas Bellinger pr_err("ib_dma_mapping_error() failed\n"); 940b8d26b3bSNicholas Bellinger return -ENOMEM; 941b8d26b3bSNicholas Bellinger } 942b8d26b3bSNicholas Bellinger 943b8d26b3bSNicholas Bellinger tx_desc->dma_addr = dma_addr; 944b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].addr = tx_desc->dma_addr; 945b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].length = ISER_HEADERS_LEN; 946b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].lkey = isert_conn->conn_mr->lkey; 947b8d26b3bSNicholas Bellinger 948b8d26b3bSNicholas Bellinger pr_debug("isert_init_tx_hdrs: Setup tx_sg[0].addr: 0x%llx length: %u" 949b8d26b3bSNicholas Bellinger " lkey: 0x%08x\n", tx_desc->tx_sg[0].addr, 950b8d26b3bSNicholas Bellinger tx_desc->tx_sg[0].length, tx_desc->tx_sg[0].lkey); 951b8d26b3bSNicholas Bellinger 952b8d26b3bSNicholas Bellinger return 0; 953b8d26b3bSNicholas Bellinger } 954b8d26b3bSNicholas Bellinger 955b8d26b3bSNicholas Bellinger static void 95695b60f07SNicholas Bellinger isert_init_send_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 95795b60f07SNicholas Bellinger struct ib_send_wr *send_wr, bool coalesce) 958b8d26b3bSNicholas Bellinger { 95995b60f07SNicholas Bellinger struct iser_tx_desc *tx_desc = &isert_cmd->tx_desc; 96095b60f07SNicholas Bellinger 961b8d26b3bSNicholas Bellinger isert_cmd->rdma_wr.iser_ib_op = ISER_IB_SEND; 962b8d26b3bSNicholas Bellinger send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc; 963b8d26b3bSNicholas Bellinger send_wr->opcode = IB_WR_SEND; 96495b60f07SNicholas Bellinger send_wr->sg_list = &tx_desc->tx_sg[0]; 965b8d26b3bSNicholas Bellinger send_wr->num_sge = isert_cmd->tx_desc.num_sge; 96695b60f07SNicholas Bellinger /* 96795b60f07SNicholas Bellinger * Coalesce send completion interrupts by only setting IB_SEND_SIGNALED 96895b60f07SNicholas Bellinger * bit for every ISERT_COMP_BATCH_COUNT number of ib_post_send() calls. 96995b60f07SNicholas Bellinger */ 970ebbe4421SNicholas Bellinger mutex_lock(&isert_conn->conn_mutex); 971ebbe4421SNicholas Bellinger if (coalesce && isert_conn->state == ISER_CONN_UP && 97295b60f07SNicholas Bellinger ++isert_conn->conn_comp_batch < ISERT_COMP_BATCH_COUNT) { 973ebbe4421SNicholas Bellinger tx_desc->llnode_active = true; 97495b60f07SNicholas Bellinger llist_add(&tx_desc->comp_llnode, &isert_conn->conn_comp_llist); 975ebbe4421SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 97695b60f07SNicholas Bellinger return; 97795b60f07SNicholas Bellinger } 97895b60f07SNicholas Bellinger isert_conn->conn_comp_batch = 0; 97995b60f07SNicholas Bellinger tx_desc->comp_llnode_batch = llist_del_all(&isert_conn->conn_comp_llist); 980ebbe4421SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 98195b60f07SNicholas Bellinger 98295b60f07SNicholas Bellinger send_wr->send_flags = IB_SEND_SIGNALED; 983b8d26b3bSNicholas Bellinger } 984b8d26b3bSNicholas Bellinger 985b8d26b3bSNicholas Bellinger static int 986b8d26b3bSNicholas Bellinger isert_rdma_post_recvl(struct isert_conn *isert_conn) 987b8d26b3bSNicholas Bellinger { 988b8d26b3bSNicholas Bellinger struct ib_recv_wr rx_wr, *rx_wr_fail; 989b8d26b3bSNicholas Bellinger struct ib_sge sge; 990b8d26b3bSNicholas Bellinger int ret; 991b8d26b3bSNicholas Bellinger 992b8d26b3bSNicholas Bellinger memset(&sge, 0, sizeof(struct ib_sge)); 993b8d26b3bSNicholas Bellinger sge.addr = isert_conn->login_req_dma; 994b8d26b3bSNicholas Bellinger sge.length = ISER_RX_LOGIN_SIZE; 995b8d26b3bSNicholas Bellinger sge.lkey = isert_conn->conn_mr->lkey; 996b8d26b3bSNicholas Bellinger 997b8d26b3bSNicholas Bellinger pr_debug("Setup sge: addr: %llx length: %d 0x%08x\n", 998b8d26b3bSNicholas Bellinger sge.addr, sge.length, sge.lkey); 999b8d26b3bSNicholas Bellinger 1000b8d26b3bSNicholas Bellinger memset(&rx_wr, 0, sizeof(struct ib_recv_wr)); 1001b8d26b3bSNicholas Bellinger rx_wr.wr_id = (unsigned long)isert_conn->login_req_buf; 1002b8d26b3bSNicholas Bellinger rx_wr.sg_list = &sge; 1003b8d26b3bSNicholas Bellinger rx_wr.num_sge = 1; 1004b8d26b3bSNicholas Bellinger 1005b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count++; 1006b8d26b3bSNicholas Bellinger ret = ib_post_recv(isert_conn->conn_qp, &rx_wr, &rx_wr_fail); 1007b8d26b3bSNicholas Bellinger if (ret) { 1008b8d26b3bSNicholas Bellinger pr_err("ib_post_recv() failed: %d\n", ret); 1009b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count--; 1010b8d26b3bSNicholas Bellinger } 1011b8d26b3bSNicholas Bellinger 1012b8d26b3bSNicholas Bellinger pr_debug("ib_post_recv(): returned success >>>>>>>>>>>>>>>>>>>>>>>>\n"); 1013b8d26b3bSNicholas Bellinger return ret; 1014b8d26b3bSNicholas Bellinger } 1015b8d26b3bSNicholas Bellinger 1016b8d26b3bSNicholas Bellinger static int 1017b8d26b3bSNicholas Bellinger isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login, 1018b8d26b3bSNicholas Bellinger u32 length) 1019b8d26b3bSNicholas Bellinger { 1020b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = conn->context; 1021b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1022b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc = &isert_conn->conn_login_tx_desc; 1023b8d26b3bSNicholas Bellinger int ret; 1024b8d26b3bSNicholas Bellinger 1025b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, NULL, tx_desc); 1026b8d26b3bSNicholas Bellinger 1027b8d26b3bSNicholas Bellinger memcpy(&tx_desc->iscsi_header, &login->rsp[0], 1028b8d26b3bSNicholas Bellinger sizeof(struct iscsi_hdr)); 1029b8d26b3bSNicholas Bellinger 1030b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, tx_desc); 1031b8d26b3bSNicholas Bellinger 1032b8d26b3bSNicholas Bellinger if (length > 0) { 1033b8d26b3bSNicholas Bellinger struct ib_sge *tx_dsg = &tx_desc->tx_sg[1]; 1034b8d26b3bSNicholas Bellinger 1035b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_rsp_dma, 1036b8d26b3bSNicholas Bellinger length, DMA_TO_DEVICE); 1037b8d26b3bSNicholas Bellinger 1038b8d26b3bSNicholas Bellinger memcpy(isert_conn->login_rsp_buf, login->rsp_buf, length); 1039b8d26b3bSNicholas Bellinger 1040b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, isert_conn->login_rsp_dma, 1041b8d26b3bSNicholas Bellinger length, DMA_TO_DEVICE); 1042b8d26b3bSNicholas Bellinger 1043b8d26b3bSNicholas Bellinger tx_dsg->addr = isert_conn->login_rsp_dma; 1044b8d26b3bSNicholas Bellinger tx_dsg->length = length; 1045b8d26b3bSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 1046b8d26b3bSNicholas Bellinger tx_desc->num_sge = 2; 1047b8d26b3bSNicholas Bellinger } 1048b8d26b3bSNicholas Bellinger if (!login->login_failed) { 1049b8d26b3bSNicholas Bellinger if (login->login_complete) { 1050b8d26b3bSNicholas Bellinger ret = isert_alloc_rx_descriptors(isert_conn); 1051b8d26b3bSNicholas Bellinger if (ret) 1052b8d26b3bSNicholas Bellinger return ret; 1053b8d26b3bSNicholas Bellinger 1054b8d26b3bSNicholas Bellinger ret = isert_post_recv(isert_conn, ISERT_MIN_POSTED_RX); 1055b8d26b3bSNicholas Bellinger if (ret) 1056b8d26b3bSNicholas Bellinger return ret; 1057b8d26b3bSNicholas Bellinger 1058b8d26b3bSNicholas Bellinger isert_conn->state = ISER_CONN_UP; 1059b8d26b3bSNicholas Bellinger goto post_send; 1060b8d26b3bSNicholas Bellinger } 1061b8d26b3bSNicholas Bellinger 1062b8d26b3bSNicholas Bellinger ret = isert_rdma_post_recvl(isert_conn); 1063b8d26b3bSNicholas Bellinger if (ret) 1064b8d26b3bSNicholas Bellinger return ret; 1065b8d26b3bSNicholas Bellinger } 1066b8d26b3bSNicholas Bellinger post_send: 1067b8d26b3bSNicholas Bellinger ret = isert_post_send(isert_conn, tx_desc); 1068b8d26b3bSNicholas Bellinger if (ret) 1069b8d26b3bSNicholas Bellinger return ret; 1070b8d26b3bSNicholas Bellinger 1071b8d26b3bSNicholas Bellinger return 0; 1072b8d26b3bSNicholas Bellinger } 1073b8d26b3bSNicholas Bellinger 1074b8d26b3bSNicholas Bellinger static void 1075b8d26b3bSNicholas Bellinger isert_rx_login_req(struct iser_rx_desc *rx_desc, int rx_buflen, 1076b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn) 1077b8d26b3bSNicholas Bellinger { 1078b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1079b8d26b3bSNicholas Bellinger struct iscsi_login *login = conn->conn_login; 1080b8d26b3bSNicholas Bellinger int size; 1081b8d26b3bSNicholas Bellinger 1082b8d26b3bSNicholas Bellinger if (!login) { 1083b8d26b3bSNicholas Bellinger pr_err("conn->conn_login is NULL\n"); 1084b8d26b3bSNicholas Bellinger dump_stack(); 1085b8d26b3bSNicholas Bellinger return; 1086b8d26b3bSNicholas Bellinger } 1087b8d26b3bSNicholas Bellinger 1088b8d26b3bSNicholas Bellinger if (login->first_request) { 1089b8d26b3bSNicholas Bellinger struct iscsi_login_req *login_req = 1090b8d26b3bSNicholas Bellinger (struct iscsi_login_req *)&rx_desc->iscsi_header; 1091b8d26b3bSNicholas Bellinger /* 1092b8d26b3bSNicholas Bellinger * Setup the initial iscsi_login values from the leading 1093b8d26b3bSNicholas Bellinger * login request PDU. 1094b8d26b3bSNicholas Bellinger */ 1095b8d26b3bSNicholas Bellinger login->leading_connection = (!login_req->tsih) ? 1 : 0; 1096b8d26b3bSNicholas Bellinger login->current_stage = 1097b8d26b3bSNicholas Bellinger (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) 1098b8d26b3bSNicholas Bellinger >> 2; 1099b8d26b3bSNicholas Bellinger login->version_min = login_req->min_version; 1100b8d26b3bSNicholas Bellinger login->version_max = login_req->max_version; 1101b8d26b3bSNicholas Bellinger memcpy(login->isid, login_req->isid, 6); 1102b8d26b3bSNicholas Bellinger login->cmd_sn = be32_to_cpu(login_req->cmdsn); 1103b8d26b3bSNicholas Bellinger login->init_task_tag = login_req->itt; 1104b8d26b3bSNicholas Bellinger login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn); 1105b8d26b3bSNicholas Bellinger login->cid = be16_to_cpu(login_req->cid); 1106b8d26b3bSNicholas Bellinger login->tsih = be16_to_cpu(login_req->tsih); 1107b8d26b3bSNicholas Bellinger } 1108b8d26b3bSNicholas Bellinger 1109b8d26b3bSNicholas Bellinger memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN); 1110b8d26b3bSNicholas Bellinger 1111b8d26b3bSNicholas Bellinger size = min(rx_buflen, MAX_KEY_VALUE_PAIRS); 1112b8d26b3bSNicholas Bellinger pr_debug("Using login payload size: %d, rx_buflen: %d MAX_KEY_VALUE_PAIRS: %d\n", 1113b8d26b3bSNicholas Bellinger size, rx_buflen, MAX_KEY_VALUE_PAIRS); 1114b8d26b3bSNicholas Bellinger memcpy(login->req_buf, &rx_desc->data[0], size); 1115b8d26b3bSNicholas Bellinger 11166faaa85fSNicholas Bellinger if (login->first_request) { 1117b8d26b3bSNicholas Bellinger complete(&isert_conn->conn_login_comp); 11186faaa85fSNicholas Bellinger return; 11196faaa85fSNicholas Bellinger } 11206faaa85fSNicholas Bellinger schedule_delayed_work(&conn->login_work, 0); 1121b8d26b3bSNicholas Bellinger } 1122b8d26b3bSNicholas Bellinger 1123b8d26b3bSNicholas Bellinger static struct iscsi_cmd 1124676687c6SNicholas Bellinger *isert_allocate_cmd(struct iscsi_conn *conn) 1125b8d26b3bSNicholas Bellinger { 1126b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 1127b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd; 1128d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd; 1129b8d26b3bSNicholas Bellinger 1130676687c6SNicholas Bellinger cmd = iscsit_allocate_cmd(conn, TASK_INTERRUPTIBLE); 1131d703ce2fSNicholas Bellinger if (!cmd) { 1132d703ce2fSNicholas Bellinger pr_err("Unable to allocate iscsi_cmd + isert_cmd\n"); 1133b8d26b3bSNicholas Bellinger return NULL; 1134b8d26b3bSNicholas Bellinger } 1135d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1136b8d26b3bSNicholas Bellinger isert_cmd->conn = isert_conn; 1137d703ce2fSNicholas Bellinger isert_cmd->iscsi_cmd = cmd; 1138b8d26b3bSNicholas Bellinger 1139d703ce2fSNicholas Bellinger return cmd; 1140b8d26b3bSNicholas Bellinger } 1141b8d26b3bSNicholas Bellinger 1142b8d26b3bSNicholas Bellinger static int 1143b8d26b3bSNicholas Bellinger isert_handle_scsi_cmd(struct isert_conn *isert_conn, 1144d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd, struct iscsi_cmd *cmd, 1145d703ce2fSNicholas Bellinger struct iser_rx_desc *rx_desc, unsigned char *buf) 1146b8d26b3bSNicholas Bellinger { 1147b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1148b8d26b3bSNicholas Bellinger struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf; 1149b8d26b3bSNicholas Bellinger struct scatterlist *sg; 1150b8d26b3bSNicholas Bellinger int imm_data, imm_data_len, unsol_data, sg_nents, rc; 1151b8d26b3bSNicholas Bellinger bool dump_payload = false; 1152b8d26b3bSNicholas Bellinger 1153b8d26b3bSNicholas Bellinger rc = iscsit_setup_scsi_cmd(conn, cmd, buf); 1154b8d26b3bSNicholas Bellinger if (rc < 0) 1155b8d26b3bSNicholas Bellinger return rc; 1156b8d26b3bSNicholas Bellinger 1157b8d26b3bSNicholas Bellinger imm_data = cmd->immediate_data; 1158b8d26b3bSNicholas Bellinger imm_data_len = cmd->first_burst_len; 1159b8d26b3bSNicholas Bellinger unsol_data = cmd->unsolicited_data; 1160b8d26b3bSNicholas Bellinger 1161b8d26b3bSNicholas Bellinger rc = iscsit_process_scsi_cmd(conn, cmd, hdr); 1162b8d26b3bSNicholas Bellinger if (rc < 0) { 1163b8d26b3bSNicholas Bellinger return 0; 1164b8d26b3bSNicholas Bellinger } else if (rc > 0) { 1165b8d26b3bSNicholas Bellinger dump_payload = true; 1166b8d26b3bSNicholas Bellinger goto sequence_cmd; 1167b8d26b3bSNicholas Bellinger } 1168b8d26b3bSNicholas Bellinger 1169b8d26b3bSNicholas Bellinger if (!imm_data) 1170b8d26b3bSNicholas Bellinger return 0; 1171b8d26b3bSNicholas Bellinger 1172b8d26b3bSNicholas Bellinger sg = &cmd->se_cmd.t_data_sg[0]; 1173b8d26b3bSNicholas Bellinger sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE)); 1174b8d26b3bSNicholas Bellinger 1175b8d26b3bSNicholas Bellinger pr_debug("Copying Immediate SG: %p sg_nents: %u from %p imm_data_len: %d\n", 1176b8d26b3bSNicholas Bellinger sg, sg_nents, &rx_desc->data[0], imm_data_len); 1177b8d26b3bSNicholas Bellinger 1178b8d26b3bSNicholas Bellinger sg_copy_from_buffer(sg, sg_nents, &rx_desc->data[0], imm_data_len); 1179b8d26b3bSNicholas Bellinger 1180b8d26b3bSNicholas Bellinger cmd->write_data_done += imm_data_len; 1181b8d26b3bSNicholas Bellinger 1182b8d26b3bSNicholas Bellinger if (cmd->write_data_done == cmd->se_cmd.data_length) { 1183b8d26b3bSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 1184b8d26b3bSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 1185b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 1186b8d26b3bSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 1187b8d26b3bSNicholas Bellinger } 1188b8d26b3bSNicholas Bellinger 1189b8d26b3bSNicholas Bellinger sequence_cmd: 1190561bf158SNicholas Bellinger rc = iscsit_sequence_cmd(conn, cmd, buf, hdr->cmdsn); 1191b8d26b3bSNicholas Bellinger 1192b8d26b3bSNicholas Bellinger if (!rc && dump_payload == false && unsol_data) 1193b8d26b3bSNicholas Bellinger iscsit_set_unsoliticed_dataout(cmd); 1194b8d26b3bSNicholas Bellinger 1195b8d26b3bSNicholas Bellinger return 0; 1196b8d26b3bSNicholas Bellinger } 1197b8d26b3bSNicholas Bellinger 1198b8d26b3bSNicholas Bellinger static int 1199b8d26b3bSNicholas Bellinger isert_handle_iscsi_dataout(struct isert_conn *isert_conn, 1200b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc, unsigned char *buf) 1201b8d26b3bSNicholas Bellinger { 1202b8d26b3bSNicholas Bellinger struct scatterlist *sg_start; 1203b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1204b8d26b3bSNicholas Bellinger struct iscsi_cmd *cmd = NULL; 1205b8d26b3bSNicholas Bellinger struct iscsi_data *hdr = (struct iscsi_data *)buf; 1206b8d26b3bSNicholas Bellinger u32 unsol_data_len = ntoh24(hdr->dlength); 1207b8d26b3bSNicholas Bellinger int rc, sg_nents, sg_off, page_off; 1208b8d26b3bSNicholas Bellinger 1209b8d26b3bSNicholas Bellinger rc = iscsit_check_dataout_hdr(conn, buf, &cmd); 1210b8d26b3bSNicholas Bellinger if (rc < 0) 1211b8d26b3bSNicholas Bellinger return rc; 1212b8d26b3bSNicholas Bellinger else if (!cmd) 1213b8d26b3bSNicholas Bellinger return 0; 1214b8d26b3bSNicholas Bellinger /* 1215b8d26b3bSNicholas Bellinger * FIXME: Unexpected unsolicited_data out 1216b8d26b3bSNicholas Bellinger */ 1217b8d26b3bSNicholas Bellinger if (!cmd->unsolicited_data) { 1218b8d26b3bSNicholas Bellinger pr_err("Received unexpected solicited data payload\n"); 1219b8d26b3bSNicholas Bellinger dump_stack(); 1220b8d26b3bSNicholas Bellinger return -1; 1221b8d26b3bSNicholas Bellinger } 1222b8d26b3bSNicholas Bellinger 1223b8d26b3bSNicholas Bellinger pr_debug("Unsolicited DataOut unsol_data_len: %u, write_data_done: %u, data_length: %u\n", 1224b8d26b3bSNicholas Bellinger unsol_data_len, cmd->write_data_done, cmd->se_cmd.data_length); 1225b8d26b3bSNicholas Bellinger 1226b8d26b3bSNicholas Bellinger sg_off = cmd->write_data_done / PAGE_SIZE; 1227b8d26b3bSNicholas Bellinger sg_start = &cmd->se_cmd.t_data_sg[sg_off]; 1228b8d26b3bSNicholas Bellinger sg_nents = max(1UL, DIV_ROUND_UP(unsol_data_len, PAGE_SIZE)); 1229b8d26b3bSNicholas Bellinger page_off = cmd->write_data_done % PAGE_SIZE; 1230b8d26b3bSNicholas Bellinger /* 1231b8d26b3bSNicholas Bellinger * FIXME: Non page-aligned unsolicited_data out 1232b8d26b3bSNicholas Bellinger */ 1233b8d26b3bSNicholas Bellinger if (page_off) { 1234b8d26b3bSNicholas Bellinger pr_err("Received unexpected non-page aligned data payload\n"); 1235b8d26b3bSNicholas Bellinger dump_stack(); 1236b8d26b3bSNicholas Bellinger return -1; 1237b8d26b3bSNicholas Bellinger } 1238b8d26b3bSNicholas Bellinger pr_debug("Copying DataOut: sg_start: %p, sg_off: %u sg_nents: %u from %p %u\n", 1239b8d26b3bSNicholas Bellinger sg_start, sg_off, sg_nents, &rx_desc->data[0], unsol_data_len); 1240b8d26b3bSNicholas Bellinger 1241b8d26b3bSNicholas Bellinger sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0], 1242b8d26b3bSNicholas Bellinger unsol_data_len); 1243b8d26b3bSNicholas Bellinger 1244b8d26b3bSNicholas Bellinger rc = iscsit_check_dataout_payload(cmd, hdr, false); 1245b8d26b3bSNicholas Bellinger if (rc < 0) 1246b8d26b3bSNicholas Bellinger return rc; 1247b8d26b3bSNicholas Bellinger 1248b8d26b3bSNicholas Bellinger return 0; 1249b8d26b3bSNicholas Bellinger } 1250b8d26b3bSNicholas Bellinger 1251b8d26b3bSNicholas Bellinger static int 1252778de368SNicholas Bellinger isert_handle_nop_out(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1253d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, 1254d703ce2fSNicholas Bellinger unsigned char *buf) 1255778de368SNicholas Bellinger { 1256778de368SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1257778de368SNicholas Bellinger struct iscsi_nopout *hdr = (struct iscsi_nopout *)buf; 1258778de368SNicholas Bellinger int rc; 1259778de368SNicholas Bellinger 1260778de368SNicholas Bellinger rc = iscsit_setup_nop_out(conn, cmd, hdr); 1261778de368SNicholas Bellinger if (rc < 0) 1262778de368SNicholas Bellinger return rc; 1263778de368SNicholas Bellinger /* 1264778de368SNicholas Bellinger * FIXME: Add support for NOPOUT payload using unsolicited RDMA payload 1265778de368SNicholas Bellinger */ 1266778de368SNicholas Bellinger 1267778de368SNicholas Bellinger return iscsit_process_nop_out(conn, cmd, hdr); 1268778de368SNicholas Bellinger } 1269778de368SNicholas Bellinger 1270778de368SNicholas Bellinger static int 1271adb54c29SNicholas Bellinger isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1272d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd, struct iser_rx_desc *rx_desc, 1273d703ce2fSNicholas Bellinger struct iscsi_text *hdr) 1274adb54c29SNicholas Bellinger { 1275adb54c29SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1276adb54c29SNicholas Bellinger u32 payload_length = ntoh24(hdr->dlength); 1277adb54c29SNicholas Bellinger int rc; 1278adb54c29SNicholas Bellinger unsigned char *text_in; 1279adb54c29SNicholas Bellinger 1280adb54c29SNicholas Bellinger rc = iscsit_setup_text_cmd(conn, cmd, hdr); 1281adb54c29SNicholas Bellinger if (rc < 0) 1282adb54c29SNicholas Bellinger return rc; 1283adb54c29SNicholas Bellinger 1284adb54c29SNicholas Bellinger text_in = kzalloc(payload_length, GFP_KERNEL); 1285adb54c29SNicholas Bellinger if (!text_in) { 1286adb54c29SNicholas Bellinger pr_err("Unable to allocate text_in of payload_length: %u\n", 1287adb54c29SNicholas Bellinger payload_length); 1288adb54c29SNicholas Bellinger return -ENOMEM; 1289adb54c29SNicholas Bellinger } 1290adb54c29SNicholas Bellinger cmd->text_in_ptr = text_in; 1291adb54c29SNicholas Bellinger 1292adb54c29SNicholas Bellinger memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length); 1293adb54c29SNicholas Bellinger 1294adb54c29SNicholas Bellinger return iscsit_process_text_cmd(conn, cmd, hdr); 1295adb54c29SNicholas Bellinger } 1296adb54c29SNicholas Bellinger 1297adb54c29SNicholas Bellinger static int 1298b8d26b3bSNicholas Bellinger isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc, 1299b8d26b3bSNicholas Bellinger uint32_t read_stag, uint64_t read_va, 1300b8d26b3bSNicholas Bellinger uint32_t write_stag, uint64_t write_va) 1301b8d26b3bSNicholas Bellinger { 1302b8d26b3bSNicholas Bellinger struct iscsi_hdr *hdr = &rx_desc->iscsi_header; 1303b8d26b3bSNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1304ca40d24eSNicholas Bellinger struct iscsi_session *sess = conn->sess; 1305b8d26b3bSNicholas Bellinger struct iscsi_cmd *cmd; 1306b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd; 1307b8d26b3bSNicholas Bellinger int ret = -EINVAL; 1308b8d26b3bSNicholas Bellinger u8 opcode = (hdr->opcode & ISCSI_OPCODE_MASK); 1309b8d26b3bSNicholas Bellinger 1310ca40d24eSNicholas Bellinger if (sess->sess_ops->SessionType && 1311ca40d24eSNicholas Bellinger (!(opcode & ISCSI_OP_TEXT) || !(opcode & ISCSI_OP_LOGOUT))) { 1312ca40d24eSNicholas Bellinger pr_err("Got illegal opcode: 0x%02x in SessionType=Discovery," 1313ca40d24eSNicholas Bellinger " ignoring\n", opcode); 1314ca40d24eSNicholas Bellinger return 0; 1315ca40d24eSNicholas Bellinger } 1316ca40d24eSNicholas Bellinger 1317b8d26b3bSNicholas Bellinger switch (opcode) { 1318b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 1319676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1320b8d26b3bSNicholas Bellinger if (!cmd) 1321b8d26b3bSNicholas Bellinger break; 1322b8d26b3bSNicholas Bellinger 1323d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1324b8d26b3bSNicholas Bellinger isert_cmd->read_stag = read_stag; 1325b8d26b3bSNicholas Bellinger isert_cmd->read_va = read_va; 1326b8d26b3bSNicholas Bellinger isert_cmd->write_stag = write_stag; 1327b8d26b3bSNicholas Bellinger isert_cmd->write_va = write_va; 1328b8d26b3bSNicholas Bellinger 1329d703ce2fSNicholas Bellinger ret = isert_handle_scsi_cmd(isert_conn, isert_cmd, cmd, 1330b8d26b3bSNicholas Bellinger rx_desc, (unsigned char *)hdr); 1331b8d26b3bSNicholas Bellinger break; 1332b8d26b3bSNicholas Bellinger case ISCSI_OP_NOOP_OUT: 1333676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1334b8d26b3bSNicholas Bellinger if (!cmd) 1335b8d26b3bSNicholas Bellinger break; 1336b8d26b3bSNicholas Bellinger 1337d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1338d703ce2fSNicholas Bellinger ret = isert_handle_nop_out(isert_conn, isert_cmd, cmd, 1339778de368SNicholas Bellinger rx_desc, (unsigned char *)hdr); 1340b8d26b3bSNicholas Bellinger break; 1341b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_DATA_OUT: 1342b8d26b3bSNicholas Bellinger ret = isert_handle_iscsi_dataout(isert_conn, rx_desc, 1343b8d26b3bSNicholas Bellinger (unsigned char *)hdr); 1344b8d26b3bSNicholas Bellinger break; 1345b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 1346676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1347b8d26b3bSNicholas Bellinger if (!cmd) 1348b8d26b3bSNicholas Bellinger break; 1349b8d26b3bSNicholas Bellinger 1350b8d26b3bSNicholas Bellinger ret = iscsit_handle_task_mgt_cmd(conn, cmd, 1351b8d26b3bSNicholas Bellinger (unsigned char *)hdr); 1352b8d26b3bSNicholas Bellinger break; 1353b8d26b3bSNicholas Bellinger case ISCSI_OP_LOGOUT: 1354676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1355b8d26b3bSNicholas Bellinger if (!cmd) 1356b8d26b3bSNicholas Bellinger break; 1357b8d26b3bSNicholas Bellinger 1358b8d26b3bSNicholas Bellinger ret = iscsit_handle_logout_cmd(conn, cmd, (unsigned char *)hdr); 1359b8d26b3bSNicholas Bellinger if (ret > 0) 1360b8d26b3bSNicholas Bellinger wait_for_completion_timeout(&conn->conn_logout_comp, 1361b8d26b3bSNicholas Bellinger SECONDS_FOR_LOGOUT_COMP * 1362b8d26b3bSNicholas Bellinger HZ); 1363b8d26b3bSNicholas Bellinger break; 1364adb54c29SNicholas Bellinger case ISCSI_OP_TEXT: 1365676687c6SNicholas Bellinger cmd = isert_allocate_cmd(conn); 1366adb54c29SNicholas Bellinger if (!cmd) 1367adb54c29SNicholas Bellinger break; 1368adb54c29SNicholas Bellinger 1369d703ce2fSNicholas Bellinger isert_cmd = iscsit_priv_cmd(cmd); 1370d703ce2fSNicholas Bellinger ret = isert_handle_text_cmd(isert_conn, isert_cmd, cmd, 1371adb54c29SNicholas Bellinger rx_desc, (struct iscsi_text *)hdr); 1372adb54c29SNicholas Bellinger break; 1373b8d26b3bSNicholas Bellinger default: 1374b8d26b3bSNicholas Bellinger pr_err("Got unknown iSCSI OpCode: 0x%02x\n", opcode); 1375b8d26b3bSNicholas Bellinger dump_stack(); 1376b8d26b3bSNicholas Bellinger break; 1377b8d26b3bSNicholas Bellinger } 1378b8d26b3bSNicholas Bellinger 1379b8d26b3bSNicholas Bellinger return ret; 1380b8d26b3bSNicholas Bellinger } 1381b8d26b3bSNicholas Bellinger 1382b8d26b3bSNicholas Bellinger static void 1383b8d26b3bSNicholas Bellinger isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn) 1384b8d26b3bSNicholas Bellinger { 1385b8d26b3bSNicholas Bellinger struct iser_hdr *iser_hdr = &rx_desc->iser_header; 1386b8d26b3bSNicholas Bellinger uint64_t read_va = 0, write_va = 0; 1387b8d26b3bSNicholas Bellinger uint32_t read_stag = 0, write_stag = 0; 1388b8d26b3bSNicholas Bellinger int rc; 1389b8d26b3bSNicholas Bellinger 1390b8d26b3bSNicholas Bellinger switch (iser_hdr->flags & 0xF0) { 1391b8d26b3bSNicholas Bellinger case ISCSI_CTRL: 1392b8d26b3bSNicholas Bellinger if (iser_hdr->flags & ISER_RSV) { 1393b8d26b3bSNicholas Bellinger read_stag = be32_to_cpu(iser_hdr->read_stag); 1394b8d26b3bSNicholas Bellinger read_va = be64_to_cpu(iser_hdr->read_va); 1395b8d26b3bSNicholas Bellinger pr_debug("ISER_RSV: read_stag: 0x%08x read_va: 0x%16llx\n", 1396b8d26b3bSNicholas Bellinger read_stag, (unsigned long long)read_va); 1397b8d26b3bSNicholas Bellinger } 1398b8d26b3bSNicholas Bellinger if (iser_hdr->flags & ISER_WSV) { 1399b8d26b3bSNicholas Bellinger write_stag = be32_to_cpu(iser_hdr->write_stag); 1400b8d26b3bSNicholas Bellinger write_va = be64_to_cpu(iser_hdr->write_va); 1401b8d26b3bSNicholas Bellinger pr_debug("ISER_WSV: write__stag: 0x%08x write_va: 0x%16llx\n", 1402b8d26b3bSNicholas Bellinger write_stag, (unsigned long long)write_va); 1403b8d26b3bSNicholas Bellinger } 1404b8d26b3bSNicholas Bellinger 1405b8d26b3bSNicholas Bellinger pr_debug("ISER ISCSI_CTRL PDU\n"); 1406b8d26b3bSNicholas Bellinger break; 1407b8d26b3bSNicholas Bellinger case ISER_HELLO: 1408b8d26b3bSNicholas Bellinger pr_err("iSER Hello message\n"); 1409b8d26b3bSNicholas Bellinger break; 1410b8d26b3bSNicholas Bellinger default: 1411b8d26b3bSNicholas Bellinger pr_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags); 1412b8d26b3bSNicholas Bellinger break; 1413b8d26b3bSNicholas Bellinger } 1414b8d26b3bSNicholas Bellinger 1415b8d26b3bSNicholas Bellinger rc = isert_rx_opcode(isert_conn, rx_desc, 1416b8d26b3bSNicholas Bellinger read_stag, read_va, write_stag, write_va); 1417b8d26b3bSNicholas Bellinger } 1418b8d26b3bSNicholas Bellinger 1419b8d26b3bSNicholas Bellinger static void 1420b8d26b3bSNicholas Bellinger isert_rx_completion(struct iser_rx_desc *desc, struct isert_conn *isert_conn, 1421b8d26b3bSNicholas Bellinger unsigned long xfer_len) 1422b8d26b3bSNicholas Bellinger { 1423b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1424b8d26b3bSNicholas Bellinger struct iscsi_hdr *hdr; 1425b8d26b3bSNicholas Bellinger u64 rx_dma; 1426b8d26b3bSNicholas Bellinger int rx_buflen, outstanding; 1427b8d26b3bSNicholas Bellinger 1428b8d26b3bSNicholas Bellinger if ((char *)desc == isert_conn->login_req_buf) { 1429b8d26b3bSNicholas Bellinger rx_dma = isert_conn->login_req_dma; 1430b8d26b3bSNicholas Bellinger rx_buflen = ISER_RX_LOGIN_SIZE; 1431b8d26b3bSNicholas Bellinger pr_debug("ISER login_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", 1432b8d26b3bSNicholas Bellinger rx_dma, rx_buflen); 1433b8d26b3bSNicholas Bellinger } else { 1434b8d26b3bSNicholas Bellinger rx_dma = desc->dma_addr; 1435b8d26b3bSNicholas Bellinger rx_buflen = ISER_RX_PAYLOAD_SIZE; 1436b8d26b3bSNicholas Bellinger pr_debug("ISER req_buf: Using rx_dma: 0x%llx, rx_buflen: %d\n", 1437b8d26b3bSNicholas Bellinger rx_dma, rx_buflen); 1438b8d26b3bSNicholas Bellinger } 1439b8d26b3bSNicholas Bellinger 1440b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_cpu(ib_dev, rx_dma, rx_buflen, DMA_FROM_DEVICE); 1441b8d26b3bSNicholas Bellinger 1442b8d26b3bSNicholas Bellinger hdr = &desc->iscsi_header; 1443b8d26b3bSNicholas Bellinger pr_debug("iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n", 1444b8d26b3bSNicholas Bellinger hdr->opcode, hdr->itt, hdr->flags, 1445b8d26b3bSNicholas Bellinger (int)(xfer_len - ISER_HEADERS_LEN)); 1446b8d26b3bSNicholas Bellinger 1447b8d26b3bSNicholas Bellinger if ((char *)desc == isert_conn->login_req_buf) 1448b8d26b3bSNicholas Bellinger isert_rx_login_req(desc, xfer_len - ISER_HEADERS_LEN, 1449b8d26b3bSNicholas Bellinger isert_conn); 1450b8d26b3bSNicholas Bellinger else 1451b8d26b3bSNicholas Bellinger isert_rx_do_work(desc, isert_conn); 1452b8d26b3bSNicholas Bellinger 1453b8d26b3bSNicholas Bellinger ib_dma_sync_single_for_device(ib_dev, rx_dma, rx_buflen, 1454b8d26b3bSNicholas Bellinger DMA_FROM_DEVICE); 1455b8d26b3bSNicholas Bellinger 1456b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count--; 1457b8d26b3bSNicholas Bellinger pr_debug("iSERT: Decremented post_recv_buf_count: %d\n", 1458b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count); 1459b8d26b3bSNicholas Bellinger 1460b8d26b3bSNicholas Bellinger if ((char *)desc == isert_conn->login_req_buf) 1461b8d26b3bSNicholas Bellinger return; 1462b8d26b3bSNicholas Bellinger 1463b8d26b3bSNicholas Bellinger outstanding = isert_conn->post_recv_buf_count; 1464b8d26b3bSNicholas Bellinger if (outstanding + ISERT_MIN_POSTED_RX <= ISERT_QP_MAX_RECV_DTOS) { 1465b8d26b3bSNicholas Bellinger int err, count = min(ISERT_QP_MAX_RECV_DTOS - outstanding, 1466b8d26b3bSNicholas Bellinger ISERT_MIN_POSTED_RX); 1467b8d26b3bSNicholas Bellinger err = isert_post_recv(isert_conn, count); 1468b8d26b3bSNicholas Bellinger if (err) { 1469b8d26b3bSNicholas Bellinger pr_err("isert_post_recv() count: %d failed, %d\n", 1470b8d26b3bSNicholas Bellinger count, err); 1471b8d26b3bSNicholas Bellinger } 1472b8d26b3bSNicholas Bellinger } 1473b8d26b3bSNicholas Bellinger } 1474b8d26b3bSNicholas Bellinger 1475e3d7e4c3SSagi Grimberg static int 1476e3d7e4c3SSagi Grimberg isert_map_data_buf(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 1477e3d7e4c3SSagi Grimberg struct scatterlist *sg, u32 nents, u32 length, u32 offset, 1478e3d7e4c3SSagi Grimberg enum iser_ib_op_code op, struct isert_data_buf *data) 1479e3d7e4c3SSagi Grimberg { 1480e3d7e4c3SSagi Grimberg struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1481e3d7e4c3SSagi Grimberg 1482e3d7e4c3SSagi Grimberg data->dma_dir = op == ISER_IB_RDMA_WRITE ? 1483e3d7e4c3SSagi Grimberg DMA_TO_DEVICE : DMA_FROM_DEVICE; 1484e3d7e4c3SSagi Grimberg 1485e3d7e4c3SSagi Grimberg data->len = length - offset; 1486e3d7e4c3SSagi Grimberg data->offset = offset; 1487e3d7e4c3SSagi Grimberg data->sg_off = data->offset / PAGE_SIZE; 1488e3d7e4c3SSagi Grimberg 1489e3d7e4c3SSagi Grimberg data->sg = &sg[data->sg_off]; 1490e3d7e4c3SSagi Grimberg data->nents = min_t(unsigned int, nents - data->sg_off, 1491e3d7e4c3SSagi Grimberg ISCSI_ISER_SG_TABLESIZE); 1492e3d7e4c3SSagi Grimberg data->len = min_t(unsigned int, data->len, ISCSI_ISER_SG_TABLESIZE * 1493e3d7e4c3SSagi Grimberg PAGE_SIZE); 1494e3d7e4c3SSagi Grimberg 1495e3d7e4c3SSagi Grimberg data->dma_nents = ib_dma_map_sg(ib_dev, data->sg, data->nents, 1496e3d7e4c3SSagi Grimberg data->dma_dir); 1497e3d7e4c3SSagi Grimberg if (unlikely(!data->dma_nents)) { 1498e3d7e4c3SSagi Grimberg pr_err("Cmd: unable to dma map SGs %p\n", sg); 1499e3d7e4c3SSagi Grimberg return -EINVAL; 1500e3d7e4c3SSagi Grimberg } 1501e3d7e4c3SSagi Grimberg 1502e3d7e4c3SSagi Grimberg pr_debug("Mapped cmd: %p count: %u sg: %p sg_nents: %u rdma_len %d\n", 1503e3d7e4c3SSagi Grimberg isert_cmd, data->dma_nents, data->sg, data->nents, data->len); 1504e3d7e4c3SSagi Grimberg 1505e3d7e4c3SSagi Grimberg return 0; 1506e3d7e4c3SSagi Grimberg } 1507e3d7e4c3SSagi Grimberg 1508e3d7e4c3SSagi Grimberg static void 1509e3d7e4c3SSagi Grimberg isert_unmap_data_buf(struct isert_conn *isert_conn, struct isert_data_buf *data) 1510e3d7e4c3SSagi Grimberg { 1511e3d7e4c3SSagi Grimberg struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1512e3d7e4c3SSagi Grimberg 1513e3d7e4c3SSagi Grimberg ib_dma_unmap_sg(ib_dev, data->sg, data->nents, data->dma_dir); 1514e3d7e4c3SSagi Grimberg memset(data, 0, sizeof(*data)); 1515e3d7e4c3SSagi Grimberg } 1516e3d7e4c3SSagi Grimberg 1517e3d7e4c3SSagi Grimberg 1518e3d7e4c3SSagi Grimberg 1519b8d26b3bSNicholas Bellinger static void 1520b8d26b3bSNicholas Bellinger isert_unmap_cmd(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) 1521b8d26b3bSNicholas Bellinger { 1522b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 1523b8d26b3bSNicholas Bellinger 152490ecc6e2SVu Pham pr_debug("isert_unmap_cmd: %p\n", isert_cmd); 1525e3d7e4c3SSagi Grimberg 1526e3d7e4c3SSagi Grimberg if (wr->data.sg) { 152790ecc6e2SVu Pham pr_debug("isert_unmap_cmd: %p unmap_sg op\n", isert_cmd); 1528e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 1529b8d26b3bSNicholas Bellinger } 1530b8d26b3bSNicholas Bellinger 153190ecc6e2SVu Pham if (wr->send_wr) { 153290ecc6e2SVu Pham pr_debug("isert_unmap_cmd: %p free send_wr\n", isert_cmd); 1533b8d26b3bSNicholas Bellinger kfree(wr->send_wr); 1534b8d26b3bSNicholas Bellinger wr->send_wr = NULL; 153590ecc6e2SVu Pham } 1536b8d26b3bSNicholas Bellinger 153790ecc6e2SVu Pham if (wr->ib_sge) { 153890ecc6e2SVu Pham pr_debug("isert_unmap_cmd: %p free ib_sge\n", isert_cmd); 153990ecc6e2SVu Pham kfree(wr->ib_sge); 154090ecc6e2SVu Pham wr->ib_sge = NULL; 154190ecc6e2SVu Pham } 1542b8d26b3bSNicholas Bellinger } 1543b8d26b3bSNicholas Bellinger 1544b8d26b3bSNicholas Bellinger static void 1545a3a5a826SSagi Grimberg isert_unreg_rdma(struct isert_cmd *isert_cmd, struct isert_conn *isert_conn) 154659464ef4SVu Pham { 154759464ef4SVu Pham struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 154859464ef4SVu Pham LIST_HEAD(unmap_list); 154959464ef4SVu Pham 1550a3a5a826SSagi Grimberg pr_debug("unreg_fastreg_cmd: %p\n", isert_cmd); 155159464ef4SVu Pham 155259464ef4SVu Pham if (wr->fr_desc) { 1553a3a5a826SSagi Grimberg pr_debug("unreg_fastreg_cmd: %p free fr_desc %p\n", 155459464ef4SVu Pham isert_cmd, wr->fr_desc); 15559e961ae7SSagi Grimberg if (wr->fr_desc->ind & ISERT_PROTECTED) { 15569e961ae7SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->prot); 15579e961ae7SSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 15589e961ae7SSagi Grimberg } 155959464ef4SVu Pham spin_lock_bh(&isert_conn->conn_lock); 1560a3a5a826SSagi Grimberg list_add_tail(&wr->fr_desc->list, &isert_conn->conn_fr_pool); 156159464ef4SVu Pham spin_unlock_bh(&isert_conn->conn_lock); 156259464ef4SVu Pham wr->fr_desc = NULL; 156359464ef4SVu Pham } 156459464ef4SVu Pham 1565e3d7e4c3SSagi Grimberg if (wr->data.sg) { 1566a3a5a826SSagi Grimberg pr_debug("unreg_fastreg_cmd: %p unmap_sg op\n", isert_cmd); 1567e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 156859464ef4SVu Pham } 156959464ef4SVu Pham 157059464ef4SVu Pham wr->ib_sge = NULL; 157159464ef4SVu Pham wr->send_wr = NULL; 157259464ef4SVu Pham } 157359464ef4SVu Pham 157459464ef4SVu Pham static void 1575b8d26b3bSNicholas Bellinger isert_put_cmd(struct isert_cmd *isert_cmd) 1576b8d26b3bSNicholas Bellinger { 1577d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1578b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = isert_cmd->conn; 1579186a9647SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1580d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 1581b8d26b3bSNicholas Bellinger 1582b8d26b3bSNicholas Bellinger pr_debug("Entering isert_put_cmd: %p\n", isert_cmd); 1583b8d26b3bSNicholas Bellinger 1584b8d26b3bSNicholas Bellinger switch (cmd->iscsi_opcode) { 1585b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_CMD: 1586b8d26b3bSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1587b8d26b3bSNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 15885159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1589b8d26b3bSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1590b8d26b3bSNicholas Bellinger 1591b8d26b3bSNicholas Bellinger if (cmd->data_direction == DMA_TO_DEVICE) 1592b8d26b3bSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 1593b8d26b3bSNicholas Bellinger 1594d40945d8SVu Pham device->unreg_rdma_mem(isert_cmd, isert_conn); 1595186a9647SNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1596186a9647SNicholas Bellinger break; 1597b8d26b3bSNicholas Bellinger case ISCSI_OP_SCSI_TMFUNC: 1598186a9647SNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1599186a9647SNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 16005159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1601186a9647SNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1602186a9647SNicholas Bellinger 1603b8d26b3bSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1604b8d26b3bSNicholas Bellinger break; 1605b8d26b3bSNicholas Bellinger case ISCSI_OP_REJECT: 1606b8d26b3bSNicholas Bellinger case ISCSI_OP_NOOP_OUT: 1607adb54c29SNicholas Bellinger case ISCSI_OP_TEXT: 1608b8d26b3bSNicholas Bellinger spin_lock_bh(&conn->cmd_lock); 1609b8d26b3bSNicholas Bellinger if (!list_empty(&cmd->i_conn_node)) 16105159d763SNicholas Bellinger list_del_init(&cmd->i_conn_node); 1611b8d26b3bSNicholas Bellinger spin_unlock_bh(&conn->cmd_lock); 1612b8d26b3bSNicholas Bellinger 1613b8d26b3bSNicholas Bellinger /* 1614b8d26b3bSNicholas Bellinger * Handle special case for REJECT when iscsi_add_reject*() has 1615b8d26b3bSNicholas Bellinger * overwritten the original iscsi_opcode assignment, and the 1616b8d26b3bSNicholas Bellinger * associated cmd->se_cmd needs to be released. 1617b8d26b3bSNicholas Bellinger */ 1618b8d26b3bSNicholas Bellinger if (cmd->se_cmd.se_tfo != NULL) { 16193df8f68aSNicholas Bellinger pr_debug("Calling transport_generic_free_cmd from" 16203df8f68aSNicholas Bellinger " isert_put_cmd for 0x%02x\n", 16213df8f68aSNicholas Bellinger cmd->iscsi_opcode); 1622b8d26b3bSNicholas Bellinger transport_generic_free_cmd(&cmd->se_cmd, 0); 1623b8d26b3bSNicholas Bellinger break; 1624b8d26b3bSNicholas Bellinger } 1625b8d26b3bSNicholas Bellinger /* 1626b8d26b3bSNicholas Bellinger * Fall-through 1627b8d26b3bSNicholas Bellinger */ 1628b8d26b3bSNicholas Bellinger default: 1629d703ce2fSNicholas Bellinger iscsit_release_cmd(cmd); 1630b8d26b3bSNicholas Bellinger break; 1631b8d26b3bSNicholas Bellinger } 1632b8d26b3bSNicholas Bellinger } 1633b8d26b3bSNicholas Bellinger 1634b8d26b3bSNicholas Bellinger static void 1635b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(struct iser_tx_desc *tx_desc, struct ib_device *ib_dev) 1636b8d26b3bSNicholas Bellinger { 1637b8d26b3bSNicholas Bellinger if (tx_desc->dma_addr != 0) { 1638b8d26b3bSNicholas Bellinger pr_debug("Calling ib_dma_unmap_single for tx_desc->dma_addr\n"); 1639b8d26b3bSNicholas Bellinger ib_dma_unmap_single(ib_dev, tx_desc->dma_addr, 1640b8d26b3bSNicholas Bellinger ISER_HEADERS_LEN, DMA_TO_DEVICE); 1641b8d26b3bSNicholas Bellinger tx_desc->dma_addr = 0; 1642b8d26b3bSNicholas Bellinger } 1643b8d26b3bSNicholas Bellinger } 1644b8d26b3bSNicholas Bellinger 1645b8d26b3bSNicholas Bellinger static void 1646b8d26b3bSNicholas Bellinger isert_completion_put(struct iser_tx_desc *tx_desc, struct isert_cmd *isert_cmd, 1647b8d26b3bSNicholas Bellinger struct ib_device *ib_dev) 1648b8d26b3bSNicholas Bellinger { 1649dbbc5d11SNicholas Bellinger if (isert_cmd->pdu_buf_dma != 0) { 1650dbbc5d11SNicholas Bellinger pr_debug("Calling ib_dma_unmap_single for isert_cmd->pdu_buf_dma\n"); 1651dbbc5d11SNicholas Bellinger ib_dma_unmap_single(ib_dev, isert_cmd->pdu_buf_dma, 1652dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len, DMA_TO_DEVICE); 1653dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = 0; 1654b8d26b3bSNicholas Bellinger } 1655b8d26b3bSNicholas Bellinger 1656b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 1657b8d26b3bSNicholas Bellinger isert_put_cmd(isert_cmd); 1658b8d26b3bSNicholas Bellinger } 1659b8d26b3bSNicholas Bellinger 1660*96b7973eSSagi Grimberg static int 1661*96b7973eSSagi Grimberg isert_check_pi_status(struct se_cmd *se_cmd, struct ib_mr *sig_mr) 1662f93f3a70SSagi Grimberg { 16639e961ae7SSagi Grimberg struct ib_mr_status mr_status; 1664*96b7973eSSagi Grimberg int ret; 1665f93f3a70SSagi Grimberg 1666*96b7973eSSagi Grimberg ret = ib_check_mr_status(sig_mr, IB_MR_CHECK_SIG_STATUS, &mr_status); 16679e961ae7SSagi Grimberg if (ret) { 16689e961ae7SSagi Grimberg pr_err("ib_check_mr_status failed, ret %d\n", ret); 16699e961ae7SSagi Grimberg goto fail_mr_status; 16709e961ae7SSagi Grimberg } 1671*96b7973eSSagi Grimberg 16729e961ae7SSagi Grimberg if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) { 1673*96b7973eSSagi Grimberg u64 sec_offset_err; 16749e961ae7SSagi Grimberg u32 block_size = se_cmd->se_dev->dev_attrib.block_size + 8; 16759e961ae7SSagi Grimberg 16769e961ae7SSagi Grimberg switch (mr_status.sig_err.err_type) { 16779e961ae7SSagi Grimberg case IB_SIG_BAD_GUARD: 16789e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED; 16799e961ae7SSagi Grimberg break; 16809e961ae7SSagi Grimberg case IB_SIG_BAD_REFTAG: 16819e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED; 16829e961ae7SSagi Grimberg break; 16839e961ae7SSagi Grimberg case IB_SIG_BAD_APPTAG: 16849e961ae7SSagi Grimberg se_cmd->pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED; 16859e961ae7SSagi Grimberg break; 16869e961ae7SSagi Grimberg } 1687*96b7973eSSagi Grimberg sec_offset_err = mr_status.sig_err.sig_err_offset; 1688*96b7973eSSagi Grimberg do_div(sec_offset_err, block_size); 1689*96b7973eSSagi Grimberg se_cmd->bad_sector = sec_offset_err + se_cmd->t_task_lba; 16909e961ae7SSagi Grimberg 16919e961ae7SSagi Grimberg pr_err("isert: PI error found type %d at sector 0x%llx " 16929e961ae7SSagi Grimberg "expected 0x%x vs actual 0x%x\n", 16939e961ae7SSagi Grimberg mr_status.sig_err.err_type, 16949e961ae7SSagi Grimberg (unsigned long long)se_cmd->bad_sector, 16959e961ae7SSagi Grimberg mr_status.sig_err.expected, 16969e961ae7SSagi Grimberg mr_status.sig_err.actual); 16979e961ae7SSagi Grimberg ret = 1; 16989e961ae7SSagi Grimberg } 16999e961ae7SSagi Grimberg 17009e961ae7SSagi Grimberg fail_mr_status: 1701*96b7973eSSagi Grimberg return ret; 1702*96b7973eSSagi Grimberg } 1703*96b7973eSSagi Grimberg 1704*96b7973eSSagi Grimberg static void 1705*96b7973eSSagi Grimberg isert_completion_rdma_write(struct iser_tx_desc *tx_desc, 1706*96b7973eSSagi Grimberg struct isert_cmd *isert_cmd) 1707*96b7973eSSagi Grimberg { 1708*96b7973eSSagi Grimberg struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 1709*96b7973eSSagi Grimberg struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1710*96b7973eSSagi Grimberg struct se_cmd *se_cmd = &cmd->se_cmd; 1711*96b7973eSSagi Grimberg struct isert_conn *isert_conn = isert_cmd->conn; 1712*96b7973eSSagi Grimberg struct isert_device *device = isert_conn->conn_device; 1713*96b7973eSSagi Grimberg int ret = 0; 1714*96b7973eSSagi Grimberg 1715*96b7973eSSagi Grimberg if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { 1716*96b7973eSSagi Grimberg ret = isert_check_pi_status(se_cmd, 1717*96b7973eSSagi Grimberg wr->fr_desc->pi_ctx->sig_mr); 1718*96b7973eSSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 1719*96b7973eSSagi Grimberg } 1720*96b7973eSSagi Grimberg 1721f93f3a70SSagi Grimberg device->unreg_rdma_mem(isert_cmd, isert_conn); 1722897bb2c9SSagi Grimberg wr->send_wr_num = 0; 17239e961ae7SSagi Grimberg if (ret) 17249e961ae7SSagi Grimberg transport_send_check_condition_and_sense(se_cmd, 17259e961ae7SSagi Grimberg se_cmd->pi_err, 0); 17269e961ae7SSagi Grimberg else 1727f93f3a70SSagi Grimberg isert_put_response(isert_conn->conn, cmd); 1728f93f3a70SSagi Grimberg } 1729f93f3a70SSagi Grimberg 1730f93f3a70SSagi Grimberg static void 1731b8d26b3bSNicholas Bellinger isert_completion_rdma_read(struct iser_tx_desc *tx_desc, 1732b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd) 1733b8d26b3bSNicholas Bellinger { 1734b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 1735d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1736b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 173790ecc6e2SVu Pham struct isert_conn *isert_conn = isert_cmd->conn; 1738d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 17399e961ae7SSagi Grimberg int ret; 1740b8d26b3bSNicholas Bellinger 17419e961ae7SSagi Grimberg if (wr->fr_desc && wr->fr_desc->ind & ISERT_PROTECTED) { 1742*96b7973eSSagi Grimberg ret = isert_check_pi_status(se_cmd, 1743*96b7973eSSagi Grimberg wr->fr_desc->pi_ctx->sig_mr); 1744*96b7973eSSagi Grimberg wr->fr_desc->ind &= ~ISERT_PROTECTED; 17459e961ae7SSagi Grimberg } 17469e961ae7SSagi Grimberg 1747b8d26b3bSNicholas Bellinger iscsit_stop_dataout_timer(cmd); 1748d40945d8SVu Pham device->unreg_rdma_mem(isert_cmd, isert_conn); 1749e3d7e4c3SSagi Grimberg cmd->write_data_done = wr->data.len; 1750b6b87a1dSNicholas Bellinger wr->send_wr_num = 0; 1751b8d26b3bSNicholas Bellinger 175290ecc6e2SVu Pham pr_debug("Cmd: %p RDMA_READ comp calling execute_cmd\n", isert_cmd); 1753b8d26b3bSNicholas Bellinger spin_lock_bh(&cmd->istate_lock); 1754b8d26b3bSNicholas Bellinger cmd->cmd_flags |= ICF_GOT_LAST_DATAOUT; 1755b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_RECEIVED_LAST_DATAOUT; 1756b8d26b3bSNicholas Bellinger spin_unlock_bh(&cmd->istate_lock); 1757b8d26b3bSNicholas Bellinger 1758b8d26b3bSNicholas Bellinger target_execute_cmd(se_cmd); 1759b8d26b3bSNicholas Bellinger } 1760b8d26b3bSNicholas Bellinger 1761b8d26b3bSNicholas Bellinger static void 1762b8d26b3bSNicholas Bellinger isert_do_control_comp(struct work_struct *work) 1763b8d26b3bSNicholas Bellinger { 1764b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd = container_of(work, 1765b8d26b3bSNicholas Bellinger struct isert_cmd, comp_work); 1766b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = isert_cmd->conn; 1767b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1768d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1769b8d26b3bSNicholas Bellinger 1770b8d26b3bSNicholas Bellinger switch (cmd->i_state) { 1771b8d26b3bSNicholas Bellinger case ISTATE_SEND_TASKMGTRSP: 1772b8d26b3bSNicholas Bellinger pr_debug("Calling iscsit_tmr_post_handler >>>>>>>>>>>>>>>>>\n"); 1773b8d26b3bSNicholas Bellinger 1774b8d26b3bSNicholas Bellinger atomic_dec(&isert_conn->post_send_buf_count); 1775b8d26b3bSNicholas Bellinger iscsit_tmr_post_handler(cmd, cmd->conn); 1776b8d26b3bSNicholas Bellinger 1777b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 1778b8d26b3bSNicholas Bellinger isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); 1779b8d26b3bSNicholas Bellinger break; 1780b8d26b3bSNicholas Bellinger case ISTATE_SEND_REJECT: 1781b8d26b3bSNicholas Bellinger pr_debug("Got isert_do_control_comp ISTATE_SEND_REJECT: >>>\n"); 1782b8d26b3bSNicholas Bellinger atomic_dec(&isert_conn->post_send_buf_count); 1783b8d26b3bSNicholas Bellinger 1784b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 1785b8d26b3bSNicholas Bellinger isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); 17863df8f68aSNicholas Bellinger break; 1787b8d26b3bSNicholas Bellinger case ISTATE_SEND_LOGOUTRSP: 1788b8d26b3bSNicholas Bellinger pr_debug("Calling iscsit_logout_post_handler >>>>>>>>>>>>>>\n"); 1789b8d26b3bSNicholas Bellinger /* 1790b8d26b3bSNicholas Bellinger * Call atomic_dec(&isert_conn->post_send_buf_count) 1791defd8848SNicholas Bellinger * from isert_wait_conn() 1792b8d26b3bSNicholas Bellinger */ 1793b8d26b3bSNicholas Bellinger isert_conn->logout_posted = true; 1794b8d26b3bSNicholas Bellinger iscsit_logout_post_handler(cmd, cmd->conn); 1795b8d26b3bSNicholas Bellinger break; 1796adb54c29SNicholas Bellinger case ISTATE_SEND_TEXTRSP: 1797adb54c29SNicholas Bellinger atomic_dec(&isert_conn->post_send_buf_count); 1798adb54c29SNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 1799adb54c29SNicholas Bellinger isert_completion_put(&isert_cmd->tx_desc, isert_cmd, ib_dev); 1800adb54c29SNicholas Bellinger break; 1801b8d26b3bSNicholas Bellinger default: 1802b8d26b3bSNicholas Bellinger pr_err("Unknown do_control_comp i_state %d\n", cmd->i_state); 1803b8d26b3bSNicholas Bellinger dump_stack(); 1804b8d26b3bSNicholas Bellinger break; 1805b8d26b3bSNicholas Bellinger } 1806b8d26b3bSNicholas Bellinger } 1807b8d26b3bSNicholas Bellinger 1808b8d26b3bSNicholas Bellinger static void 1809b8d26b3bSNicholas Bellinger isert_response_completion(struct iser_tx_desc *tx_desc, 1810b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd, 1811b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn, 1812b8d26b3bSNicholas Bellinger struct ib_device *ib_dev) 1813b8d26b3bSNicholas Bellinger { 1814d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 1815b6b87a1dSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 1816b8d26b3bSNicholas Bellinger 1817b8d26b3bSNicholas Bellinger if (cmd->i_state == ISTATE_SEND_TASKMGTRSP || 18183df8f68aSNicholas Bellinger cmd->i_state == ISTATE_SEND_LOGOUTRSP || 1819adb54c29SNicholas Bellinger cmd->i_state == ISTATE_SEND_REJECT || 1820adb54c29SNicholas Bellinger cmd->i_state == ISTATE_SEND_TEXTRSP) { 1821b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 1822b8d26b3bSNicholas Bellinger 1823b8d26b3bSNicholas Bellinger INIT_WORK(&isert_cmd->comp_work, isert_do_control_comp); 1824b8d26b3bSNicholas Bellinger queue_work(isert_comp_wq, &isert_cmd->comp_work); 1825b8d26b3bSNicholas Bellinger return; 1826b8d26b3bSNicholas Bellinger } 1827897bb2c9SSagi Grimberg 1828897bb2c9SSagi Grimberg /** 1829897bb2c9SSagi Grimberg * If send_wr_num is 0 this means that we got 1830897bb2c9SSagi Grimberg * RDMA completion and we cleared it and we should 1831897bb2c9SSagi Grimberg * simply decrement the response post. else the 1832897bb2c9SSagi Grimberg * response is incorporated in send_wr_num, just 1833897bb2c9SSagi Grimberg * sub it. 1834897bb2c9SSagi Grimberg **/ 1835897bb2c9SSagi Grimberg if (wr->send_wr_num) 1836897bb2c9SSagi Grimberg atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); 1837897bb2c9SSagi Grimberg else 1838897bb2c9SSagi Grimberg atomic_dec(&isert_conn->post_send_buf_count); 1839b8d26b3bSNicholas Bellinger 1840b8d26b3bSNicholas Bellinger cmd->i_state = ISTATE_SENT_STATUS; 1841b8d26b3bSNicholas Bellinger isert_completion_put(tx_desc, isert_cmd, ib_dev); 1842b8d26b3bSNicholas Bellinger } 1843b8d26b3bSNicholas Bellinger 1844b8d26b3bSNicholas Bellinger static void 184595b60f07SNicholas Bellinger __isert_send_completion(struct iser_tx_desc *tx_desc, 1846b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn) 1847b8d26b3bSNicholas Bellinger { 1848b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1849b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd = tx_desc->isert_cmd; 1850b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr; 1851b8d26b3bSNicholas Bellinger 1852b8d26b3bSNicholas Bellinger if (!isert_cmd) { 1853b8d26b3bSNicholas Bellinger atomic_dec(&isert_conn->post_send_buf_count); 1854b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 1855b8d26b3bSNicholas Bellinger return; 1856b8d26b3bSNicholas Bellinger } 1857b8d26b3bSNicholas Bellinger wr = &isert_cmd->rdma_wr; 1858b8d26b3bSNicholas Bellinger 1859b8d26b3bSNicholas Bellinger switch (wr->iser_ib_op) { 1860b8d26b3bSNicholas Bellinger case ISER_IB_RECV: 1861b8d26b3bSNicholas Bellinger pr_err("isert_send_completion: Got ISER_IB_RECV\n"); 1862b8d26b3bSNicholas Bellinger dump_stack(); 1863b8d26b3bSNicholas Bellinger break; 1864b8d26b3bSNicholas Bellinger case ISER_IB_SEND: 1865b8d26b3bSNicholas Bellinger pr_debug("isert_send_completion: Got ISER_IB_SEND\n"); 1866b8d26b3bSNicholas Bellinger isert_response_completion(tx_desc, isert_cmd, 1867b8d26b3bSNicholas Bellinger isert_conn, ib_dev); 1868b8d26b3bSNicholas Bellinger break; 1869b8d26b3bSNicholas Bellinger case ISER_IB_RDMA_WRITE: 1870f93f3a70SSagi Grimberg pr_debug("isert_send_completion: Got ISER_IB_RDMA_WRITE\n"); 1871897bb2c9SSagi Grimberg atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); 1872f93f3a70SSagi Grimberg isert_completion_rdma_write(tx_desc, isert_cmd); 1873b8d26b3bSNicholas Bellinger break; 1874b8d26b3bSNicholas Bellinger case ISER_IB_RDMA_READ: 1875b8d26b3bSNicholas Bellinger pr_debug("isert_send_completion: Got ISER_IB_RDMA_READ:\n"); 1876b8d26b3bSNicholas Bellinger 1877b6b87a1dSNicholas Bellinger atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); 1878b8d26b3bSNicholas Bellinger isert_completion_rdma_read(tx_desc, isert_cmd); 1879b8d26b3bSNicholas Bellinger break; 1880b8d26b3bSNicholas Bellinger default: 1881b8d26b3bSNicholas Bellinger pr_err("Unknown wr->iser_ib_op: 0x%02x\n", wr->iser_ib_op); 1882b8d26b3bSNicholas Bellinger dump_stack(); 1883b8d26b3bSNicholas Bellinger break; 1884b8d26b3bSNicholas Bellinger } 1885b8d26b3bSNicholas Bellinger } 1886b8d26b3bSNicholas Bellinger 1887b8d26b3bSNicholas Bellinger static void 188895b60f07SNicholas Bellinger isert_send_completion(struct iser_tx_desc *tx_desc, 188995b60f07SNicholas Bellinger struct isert_conn *isert_conn) 189095b60f07SNicholas Bellinger { 189195b60f07SNicholas Bellinger struct llist_node *llnode = tx_desc->comp_llnode_batch; 189295b60f07SNicholas Bellinger struct iser_tx_desc *t; 189395b60f07SNicholas Bellinger /* 189495b60f07SNicholas Bellinger * Drain coalesced completion llist starting from comp_llnode_batch 189595b60f07SNicholas Bellinger * setup in isert_init_send_wr(), and then complete trailing tx_desc. 189695b60f07SNicholas Bellinger */ 189795b60f07SNicholas Bellinger while (llnode) { 189895b60f07SNicholas Bellinger t = llist_entry(llnode, struct iser_tx_desc, comp_llnode); 189995b60f07SNicholas Bellinger llnode = llist_next(llnode); 190095b60f07SNicholas Bellinger __isert_send_completion(t, isert_conn); 190195b60f07SNicholas Bellinger } 190295b60f07SNicholas Bellinger __isert_send_completion(tx_desc, isert_conn); 190395b60f07SNicholas Bellinger } 190495b60f07SNicholas Bellinger 190595b60f07SNicholas Bellinger static void 1906ebbe4421SNicholas Bellinger isert_cq_drain_comp_llist(struct isert_conn *isert_conn, struct ib_device *ib_dev) 1907ebbe4421SNicholas Bellinger { 1908ebbe4421SNicholas Bellinger struct llist_node *llnode; 1909ebbe4421SNicholas Bellinger struct isert_rdma_wr *wr; 1910ebbe4421SNicholas Bellinger struct iser_tx_desc *t; 1911ebbe4421SNicholas Bellinger 1912ebbe4421SNicholas Bellinger mutex_lock(&isert_conn->conn_mutex); 1913ebbe4421SNicholas Bellinger llnode = llist_del_all(&isert_conn->conn_comp_llist); 1914ebbe4421SNicholas Bellinger isert_conn->conn_comp_batch = 0; 1915ebbe4421SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 1916ebbe4421SNicholas Bellinger 1917ebbe4421SNicholas Bellinger while (llnode) { 1918ebbe4421SNicholas Bellinger t = llist_entry(llnode, struct iser_tx_desc, comp_llnode); 1919ebbe4421SNicholas Bellinger llnode = llist_next(llnode); 1920ebbe4421SNicholas Bellinger wr = &t->isert_cmd->rdma_wr; 1921ebbe4421SNicholas Bellinger 1922897bb2c9SSagi Grimberg /** 1923897bb2c9SSagi Grimberg * If send_wr_num is 0 this means that we got 1924897bb2c9SSagi Grimberg * RDMA completion and we cleared it and we should 1925897bb2c9SSagi Grimberg * simply decrement the response post. else the 1926897bb2c9SSagi Grimberg * response is incorporated in send_wr_num, just 1927897bb2c9SSagi Grimberg * sub it. 1928897bb2c9SSagi Grimberg **/ 1929897bb2c9SSagi Grimberg if (wr->send_wr_num) 1930897bb2c9SSagi Grimberg atomic_sub(wr->send_wr_num, 1931897bb2c9SSagi Grimberg &isert_conn->post_send_buf_count); 1932897bb2c9SSagi Grimberg else 1933897bb2c9SSagi Grimberg atomic_dec(&isert_conn->post_send_buf_count); 1934ebbe4421SNicholas Bellinger isert_completion_put(t, t->isert_cmd, ib_dev); 1935ebbe4421SNicholas Bellinger } 1936ebbe4421SNicholas Bellinger } 1937ebbe4421SNicholas Bellinger 1938ebbe4421SNicholas Bellinger static void 1939defd8848SNicholas Bellinger isert_cq_tx_comp_err(struct iser_tx_desc *tx_desc, struct isert_conn *isert_conn) 1940b8d26b3bSNicholas Bellinger { 1941b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1942b8d26b3bSNicholas Bellinger struct isert_cmd *isert_cmd = tx_desc->isert_cmd; 1943ebbe4421SNicholas Bellinger struct llist_node *llnode = tx_desc->comp_llnode_batch; 1944ebbe4421SNicholas Bellinger struct isert_rdma_wr *wr; 1945ebbe4421SNicholas Bellinger struct iser_tx_desc *t; 1946ebbe4421SNicholas Bellinger 1947ebbe4421SNicholas Bellinger while (llnode) { 1948ebbe4421SNicholas Bellinger t = llist_entry(llnode, struct iser_tx_desc, comp_llnode); 1949ebbe4421SNicholas Bellinger llnode = llist_next(llnode); 1950ebbe4421SNicholas Bellinger wr = &t->isert_cmd->rdma_wr; 1951ebbe4421SNicholas Bellinger 1952897bb2c9SSagi Grimberg /** 1953897bb2c9SSagi Grimberg * If send_wr_num is 0 this means that we got 1954897bb2c9SSagi Grimberg * RDMA completion and we cleared it and we should 1955897bb2c9SSagi Grimberg * simply decrement the response post. else the 1956897bb2c9SSagi Grimberg * response is incorporated in send_wr_num, just 1957897bb2c9SSagi Grimberg * sub it. 1958897bb2c9SSagi Grimberg **/ 1959897bb2c9SSagi Grimberg if (wr->send_wr_num) 1960897bb2c9SSagi Grimberg atomic_sub(wr->send_wr_num, 1961897bb2c9SSagi Grimberg &isert_conn->post_send_buf_count); 1962897bb2c9SSagi Grimberg else 1963897bb2c9SSagi Grimberg atomic_dec(&isert_conn->post_send_buf_count); 1964ebbe4421SNicholas Bellinger isert_completion_put(t, t->isert_cmd, ib_dev); 1965ebbe4421SNicholas Bellinger } 1966ebbe4421SNicholas Bellinger tx_desc->comp_llnode_batch = NULL; 1967b8d26b3bSNicholas Bellinger 1968b8d26b3bSNicholas Bellinger if (!isert_cmd) 1969b8d26b3bSNicholas Bellinger isert_unmap_tx_desc(tx_desc, ib_dev); 1970b8d26b3bSNicholas Bellinger else 1971b8d26b3bSNicholas Bellinger isert_completion_put(tx_desc, isert_cmd, ib_dev); 1972b8d26b3bSNicholas Bellinger } 1973b8d26b3bSNicholas Bellinger 1974defd8848SNicholas Bellinger static void 1975defd8848SNicholas Bellinger isert_cq_rx_comp_err(struct isert_conn *isert_conn) 1976defd8848SNicholas Bellinger { 1977defd8848SNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 1978defd8848SNicholas Bellinger struct iscsi_conn *conn = isert_conn->conn; 1979defd8848SNicholas Bellinger 1980defd8848SNicholas Bellinger if (isert_conn->post_recv_buf_count) 1981defd8848SNicholas Bellinger return; 1982defd8848SNicholas Bellinger 1983ebbe4421SNicholas Bellinger isert_cq_drain_comp_llist(isert_conn, ib_dev); 1984ebbe4421SNicholas Bellinger 1985defd8848SNicholas Bellinger if (conn->sess) { 1986defd8848SNicholas Bellinger target_sess_cmd_list_set_waiting(conn->sess->se_sess); 1987defd8848SNicholas Bellinger target_wait_for_sess_cmds(conn->sess->se_sess); 1988defd8848SNicholas Bellinger } 1989defd8848SNicholas Bellinger 1990defd8848SNicholas Bellinger while (atomic_read(&isert_conn->post_send_buf_count)) 1991defd8848SNicholas Bellinger msleep(3000); 1992b8d26b3bSNicholas Bellinger 1993b2cb9649SNicholas Bellinger mutex_lock(&isert_conn->conn_mutex); 1994defd8848SNicholas Bellinger isert_conn->state = ISER_CONN_DOWN; 1995b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 1996b2cb9649SNicholas Bellinger 1997defd8848SNicholas Bellinger complete(&isert_conn->conn_wait_comp_err); 1998b8d26b3bSNicholas Bellinger } 1999b8d26b3bSNicholas Bellinger 2000b8d26b3bSNicholas Bellinger static void 2001b8d26b3bSNicholas Bellinger isert_cq_tx_work(struct work_struct *work) 2002b8d26b3bSNicholas Bellinger { 2003b8d26b3bSNicholas Bellinger struct isert_cq_desc *cq_desc = container_of(work, 2004b8d26b3bSNicholas Bellinger struct isert_cq_desc, cq_tx_work); 2005b8d26b3bSNicholas Bellinger struct isert_device *device = cq_desc->device; 2006b8d26b3bSNicholas Bellinger int cq_index = cq_desc->cq_index; 2007b8d26b3bSNicholas Bellinger struct ib_cq *tx_cq = device->dev_tx_cq[cq_index]; 2008b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 2009b8d26b3bSNicholas Bellinger struct iser_tx_desc *tx_desc; 2010b8d26b3bSNicholas Bellinger struct ib_wc wc; 2011b8d26b3bSNicholas Bellinger 2012b8d26b3bSNicholas Bellinger while (ib_poll_cq(tx_cq, 1, &wc) == 1) { 2013b8d26b3bSNicholas Bellinger tx_desc = (struct iser_tx_desc *)(unsigned long)wc.wr_id; 2014b8d26b3bSNicholas Bellinger isert_conn = wc.qp->qp_context; 2015b8d26b3bSNicholas Bellinger 2016b8d26b3bSNicholas Bellinger if (wc.status == IB_WC_SUCCESS) { 2017b8d26b3bSNicholas Bellinger isert_send_completion(tx_desc, isert_conn); 2018b8d26b3bSNicholas Bellinger } else { 2019b8d26b3bSNicholas Bellinger pr_debug("TX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n"); 2020b8d26b3bSNicholas Bellinger pr_debug("TX wc.status: 0x%08x\n", wc.status); 2021c5a2adbfSNicholas Bellinger pr_debug("TX wc.vendor_err: 0x%08x\n", wc.vendor_err); 2022defd8848SNicholas Bellinger 20239bb4ca68SNicholas Bellinger if (wc.wr_id != ISER_FASTREG_LI_WRID) { 2024ebbe4421SNicholas Bellinger if (tx_desc->llnode_active) 2025ebbe4421SNicholas Bellinger continue; 2026ebbe4421SNicholas Bellinger 2027b8d26b3bSNicholas Bellinger atomic_dec(&isert_conn->post_send_buf_count); 2028defd8848SNicholas Bellinger isert_cq_tx_comp_err(tx_desc, isert_conn); 2029b8d26b3bSNicholas Bellinger } 2030b8d26b3bSNicholas Bellinger } 20319bb4ca68SNicholas Bellinger } 2032b8d26b3bSNicholas Bellinger 2033b8d26b3bSNicholas Bellinger ib_req_notify_cq(tx_cq, IB_CQ_NEXT_COMP); 2034b8d26b3bSNicholas Bellinger } 2035b8d26b3bSNicholas Bellinger 2036b8d26b3bSNicholas Bellinger static void 2037b8d26b3bSNicholas Bellinger isert_cq_tx_callback(struct ib_cq *cq, void *context) 2038b8d26b3bSNicholas Bellinger { 2039b8d26b3bSNicholas Bellinger struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context; 2040b8d26b3bSNicholas Bellinger 2041b8d26b3bSNicholas Bellinger queue_work(isert_comp_wq, &cq_desc->cq_tx_work); 2042b8d26b3bSNicholas Bellinger } 2043b8d26b3bSNicholas Bellinger 2044b8d26b3bSNicholas Bellinger static void 2045b8d26b3bSNicholas Bellinger isert_cq_rx_work(struct work_struct *work) 2046b8d26b3bSNicholas Bellinger { 2047b8d26b3bSNicholas Bellinger struct isert_cq_desc *cq_desc = container_of(work, 2048b8d26b3bSNicholas Bellinger struct isert_cq_desc, cq_rx_work); 2049b8d26b3bSNicholas Bellinger struct isert_device *device = cq_desc->device; 2050b8d26b3bSNicholas Bellinger int cq_index = cq_desc->cq_index; 2051b8d26b3bSNicholas Bellinger struct ib_cq *rx_cq = device->dev_rx_cq[cq_index]; 2052b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 2053b8d26b3bSNicholas Bellinger struct iser_rx_desc *rx_desc; 2054b8d26b3bSNicholas Bellinger struct ib_wc wc; 2055b8d26b3bSNicholas Bellinger unsigned long xfer_len; 2056b8d26b3bSNicholas Bellinger 2057b8d26b3bSNicholas Bellinger while (ib_poll_cq(rx_cq, 1, &wc) == 1) { 2058b8d26b3bSNicholas Bellinger rx_desc = (struct iser_rx_desc *)(unsigned long)wc.wr_id; 2059b8d26b3bSNicholas Bellinger isert_conn = wc.qp->qp_context; 2060b8d26b3bSNicholas Bellinger 2061b8d26b3bSNicholas Bellinger if (wc.status == IB_WC_SUCCESS) { 2062b8d26b3bSNicholas Bellinger xfer_len = (unsigned long)wc.byte_len; 2063b8d26b3bSNicholas Bellinger isert_rx_completion(rx_desc, isert_conn, xfer_len); 2064b8d26b3bSNicholas Bellinger } else { 2065b8d26b3bSNicholas Bellinger pr_debug("RX wc.status != IB_WC_SUCCESS >>>>>>>>>>>>>>\n"); 2066c5a2adbfSNicholas Bellinger if (wc.status != IB_WC_WR_FLUSH_ERR) { 2067b8d26b3bSNicholas Bellinger pr_debug("RX wc.status: 0x%08x\n", wc.status); 2068c5a2adbfSNicholas Bellinger pr_debug("RX wc.vendor_err: 0x%08x\n", 2069c5a2adbfSNicholas Bellinger wc.vendor_err); 2070c5a2adbfSNicholas Bellinger } 2071b8d26b3bSNicholas Bellinger isert_conn->post_recv_buf_count--; 2072defd8848SNicholas Bellinger isert_cq_rx_comp_err(isert_conn); 2073b8d26b3bSNicholas Bellinger } 2074b8d26b3bSNicholas Bellinger } 2075b8d26b3bSNicholas Bellinger 2076b8d26b3bSNicholas Bellinger ib_req_notify_cq(rx_cq, IB_CQ_NEXT_COMP); 2077b8d26b3bSNicholas Bellinger } 2078b8d26b3bSNicholas Bellinger 2079b8d26b3bSNicholas Bellinger static void 2080b8d26b3bSNicholas Bellinger isert_cq_rx_callback(struct ib_cq *cq, void *context) 2081b8d26b3bSNicholas Bellinger { 2082b8d26b3bSNicholas Bellinger struct isert_cq_desc *cq_desc = (struct isert_cq_desc *)context; 2083b8d26b3bSNicholas Bellinger 2084b8d26b3bSNicholas Bellinger queue_work(isert_rx_wq, &cq_desc->cq_rx_work); 2085b8d26b3bSNicholas Bellinger } 2086b8d26b3bSNicholas Bellinger 2087b8d26b3bSNicholas Bellinger static int 2088b8d26b3bSNicholas Bellinger isert_post_response(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd) 2089b8d26b3bSNicholas Bellinger { 2090b8d26b3bSNicholas Bellinger struct ib_send_wr *wr_failed; 2091b8d26b3bSNicholas Bellinger int ret; 2092b8d26b3bSNicholas Bellinger 2093b8d26b3bSNicholas Bellinger atomic_inc(&isert_conn->post_send_buf_count); 2094b8d26b3bSNicholas Bellinger 2095b8d26b3bSNicholas Bellinger ret = ib_post_send(isert_conn->conn_qp, &isert_cmd->tx_desc.send_wr, 2096b8d26b3bSNicholas Bellinger &wr_failed); 2097b8d26b3bSNicholas Bellinger if (ret) { 2098b8d26b3bSNicholas Bellinger pr_err("ib_post_send failed with %d\n", ret); 2099b8d26b3bSNicholas Bellinger atomic_dec(&isert_conn->post_send_buf_count); 2100b8d26b3bSNicholas Bellinger return ret; 2101b8d26b3bSNicholas Bellinger } 2102b8d26b3bSNicholas Bellinger return ret; 2103b8d26b3bSNicholas Bellinger } 2104b8d26b3bSNicholas Bellinger 2105b8d26b3bSNicholas Bellinger static int 2106b8d26b3bSNicholas Bellinger isert_put_response(struct iscsi_conn *conn, struct iscsi_cmd *cmd) 2107b8d26b3bSNicholas Bellinger { 2108d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2109b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2110b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2111b8d26b3bSNicholas Bellinger struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *) 2112b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header; 2113b8d26b3bSNicholas Bellinger 2114b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2115b8d26b3bSNicholas Bellinger iscsit_build_rsp_pdu(cmd, conn, true, hdr); 2116b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 2117b8d26b3bSNicholas Bellinger /* 2118b8d26b3bSNicholas Bellinger * Attach SENSE DATA payload to iSCSI Response PDU 2119b8d26b3bSNicholas Bellinger */ 2120b8d26b3bSNicholas Bellinger if (cmd->se_cmd.sense_buffer && 2121b8d26b3bSNicholas Bellinger ((cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) || 2122b8d26b3bSNicholas Bellinger (cmd->se_cmd.se_cmd_flags & SCF_EMULATED_TASK_SENSE))) { 2123b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2124b8d26b3bSNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 2125dbbc5d11SNicholas Bellinger u32 padding, pdu_len; 2126b8d26b3bSNicholas Bellinger 2127b8d26b3bSNicholas Bellinger put_unaligned_be16(cmd->se_cmd.scsi_sense_length, 2128b8d26b3bSNicholas Bellinger cmd->sense_buffer); 2129b8d26b3bSNicholas Bellinger cmd->se_cmd.scsi_sense_length += sizeof(__be16); 2130b8d26b3bSNicholas Bellinger 2131b8d26b3bSNicholas Bellinger padding = -(cmd->se_cmd.scsi_sense_length) & 3; 2132b8d26b3bSNicholas Bellinger hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length); 2133dbbc5d11SNicholas Bellinger pdu_len = cmd->se_cmd.scsi_sense_length + padding; 2134b8d26b3bSNicholas Bellinger 2135dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 2136dbbc5d11SNicholas Bellinger (void *)cmd->sense_buffer, pdu_len, 2137b8d26b3bSNicholas Bellinger DMA_TO_DEVICE); 2138b8d26b3bSNicholas Bellinger 2139dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len = pdu_len; 2140dbbc5d11SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 2141dbbc5d11SNicholas Bellinger tx_dsg->length = pdu_len; 2142b8d26b3bSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 2143b8d26b3bSNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 2144b8d26b3bSNicholas Bellinger } 2145b8d26b3bSNicholas Bellinger 214695b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, send_wr, true); 2147b8d26b3bSNicholas Bellinger 2148b8d26b3bSNicholas Bellinger pr_debug("Posting SCSI Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2149b8d26b3bSNicholas Bellinger 2150b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2151b8d26b3bSNicholas Bellinger } 2152b8d26b3bSNicholas Bellinger 2153b8d26b3bSNicholas Bellinger static int 2154b8d26b3bSNicholas Bellinger isert_put_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn, 2155b8d26b3bSNicholas Bellinger bool nopout_response) 2156b8d26b3bSNicholas Bellinger { 2157d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2158b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2159b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2160b8d26b3bSNicholas Bellinger 2161b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2162b8d26b3bSNicholas Bellinger iscsit_build_nopin_rsp(cmd, conn, (struct iscsi_nopin *) 2163b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header, 2164b8d26b3bSNicholas Bellinger nopout_response); 2165b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 216695b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); 2167b8d26b3bSNicholas Bellinger 21688b513d0cSMasanari Iida pr_debug("Posting NOPIN Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2169b8d26b3bSNicholas Bellinger 2170b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2171b8d26b3bSNicholas Bellinger } 2172b8d26b3bSNicholas Bellinger 2173b8d26b3bSNicholas Bellinger static int 2174b8d26b3bSNicholas Bellinger isert_put_logout_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2175b8d26b3bSNicholas Bellinger { 2176d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2177b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2178b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2179b8d26b3bSNicholas Bellinger 2180b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2181b8d26b3bSNicholas Bellinger iscsit_build_logout_rsp(cmd, conn, (struct iscsi_logout_rsp *) 2182b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2183b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 218495b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); 2185b8d26b3bSNicholas Bellinger 2186b8d26b3bSNicholas Bellinger pr_debug("Posting Logout Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2187b8d26b3bSNicholas Bellinger 2188b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2189b8d26b3bSNicholas Bellinger } 2190b8d26b3bSNicholas Bellinger 2191b8d26b3bSNicholas Bellinger static int 2192b8d26b3bSNicholas Bellinger isert_put_tm_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2193b8d26b3bSNicholas Bellinger { 2194d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2195b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2196b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2197b8d26b3bSNicholas Bellinger 2198b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2199b8d26b3bSNicholas Bellinger iscsit_build_task_mgt_rsp(cmd, conn, (struct iscsi_tm_rsp *) 2200b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2201b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 220295b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); 2203b8d26b3bSNicholas Bellinger 2204b8d26b3bSNicholas Bellinger pr_debug("Posting Task Management Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2205b8d26b3bSNicholas Bellinger 2206b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2207b8d26b3bSNicholas Bellinger } 2208b8d26b3bSNicholas Bellinger 2209b8d26b3bSNicholas Bellinger static int 2210b8d26b3bSNicholas Bellinger isert_put_reject(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2211b8d26b3bSNicholas Bellinger { 2212d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2213b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2214b8d26b3bSNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 22153df8f68aSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 22163df8f68aSNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 22173df8f68aSNicholas Bellinger struct iscsi_reject *hdr = 22183df8f68aSNicholas Bellinger (struct iscsi_reject *)&isert_cmd->tx_desc.iscsi_header; 2219b8d26b3bSNicholas Bellinger 2220b8d26b3bSNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 22213df8f68aSNicholas Bellinger iscsit_build_reject(cmd, conn, hdr); 2222b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 22233df8f68aSNicholas Bellinger 22243df8f68aSNicholas Bellinger hton24(hdr->dlength, ISCSI_HDR_LEN); 2225dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 22263df8f68aSNicholas Bellinger (void *)cmd->buf_ptr, ISCSI_HDR_LEN, 22273df8f68aSNicholas Bellinger DMA_TO_DEVICE); 2228dbbc5d11SNicholas Bellinger isert_cmd->pdu_buf_len = ISCSI_HDR_LEN; 2229dbbc5d11SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 22303df8f68aSNicholas Bellinger tx_dsg->length = ISCSI_HDR_LEN; 22313df8f68aSNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 22323df8f68aSNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 22333df8f68aSNicholas Bellinger 223495b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); 2235b8d26b3bSNicholas Bellinger 2236b8d26b3bSNicholas Bellinger pr_debug("Posting Reject IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2237b8d26b3bSNicholas Bellinger 2238b8d26b3bSNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2239b8d26b3bSNicholas Bellinger } 2240b8d26b3bSNicholas Bellinger 2241b8d26b3bSNicholas Bellinger static int 2242adb54c29SNicholas Bellinger isert_put_text_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn) 2243adb54c29SNicholas Bellinger { 2244d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2245adb54c29SNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2246adb54c29SNicholas Bellinger struct ib_send_wr *send_wr = &isert_cmd->tx_desc.send_wr; 2247adb54c29SNicholas Bellinger struct iscsi_text_rsp *hdr = 2248adb54c29SNicholas Bellinger (struct iscsi_text_rsp *)&isert_cmd->tx_desc.iscsi_header; 2249adb54c29SNicholas Bellinger u32 txt_rsp_len; 2250adb54c29SNicholas Bellinger int rc; 2251adb54c29SNicholas Bellinger 2252adb54c29SNicholas Bellinger isert_create_send_desc(isert_conn, isert_cmd, &isert_cmd->tx_desc); 2253adb54c29SNicholas Bellinger rc = iscsit_build_text_rsp(cmd, conn, hdr); 2254adb54c29SNicholas Bellinger if (rc < 0) 2255adb54c29SNicholas Bellinger return rc; 2256adb54c29SNicholas Bellinger 2257adb54c29SNicholas Bellinger txt_rsp_len = rc; 2258adb54c29SNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 2259adb54c29SNicholas Bellinger 2260adb54c29SNicholas Bellinger if (txt_rsp_len) { 2261adb54c29SNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2262adb54c29SNicholas Bellinger struct ib_sge *tx_dsg = &isert_cmd->tx_desc.tx_sg[1]; 2263adb54c29SNicholas Bellinger void *txt_rsp_buf = cmd->buf_ptr; 2264adb54c29SNicholas Bellinger 2265adb54c29SNicholas Bellinger isert_cmd->pdu_buf_dma = ib_dma_map_single(ib_dev, 2266adb54c29SNicholas Bellinger txt_rsp_buf, txt_rsp_len, DMA_TO_DEVICE); 2267adb54c29SNicholas Bellinger 2268adb54c29SNicholas Bellinger isert_cmd->pdu_buf_len = txt_rsp_len; 2269adb54c29SNicholas Bellinger tx_dsg->addr = isert_cmd->pdu_buf_dma; 2270adb54c29SNicholas Bellinger tx_dsg->length = txt_rsp_len; 2271adb54c29SNicholas Bellinger tx_dsg->lkey = isert_conn->conn_mr->lkey; 2272adb54c29SNicholas Bellinger isert_cmd->tx_desc.num_sge = 2; 2273adb54c29SNicholas Bellinger } 227495b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, send_wr, false); 2275adb54c29SNicholas Bellinger 2276adb54c29SNicholas Bellinger pr_debug("Posting Text Response IB_WR_SEND >>>>>>>>>>>>>>>>>>>>>>\n"); 2277adb54c29SNicholas Bellinger 2278adb54c29SNicholas Bellinger return isert_post_response(isert_conn, isert_cmd); 2279adb54c29SNicholas Bellinger } 2280adb54c29SNicholas Bellinger 2281adb54c29SNicholas Bellinger static int 2282b8d26b3bSNicholas Bellinger isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd, 2283b8d26b3bSNicholas Bellinger struct ib_sge *ib_sge, struct ib_send_wr *send_wr, 2284b8d26b3bSNicholas Bellinger u32 data_left, u32 offset) 2285b8d26b3bSNicholas Bellinger { 2286d703ce2fSNicholas Bellinger struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd; 2287b8d26b3bSNicholas Bellinger struct scatterlist *sg_start, *tmp_sg; 2288b8d26b3bSNicholas Bellinger struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 2289b8d26b3bSNicholas Bellinger u32 sg_off, page_off; 2290b8d26b3bSNicholas Bellinger int i = 0, sg_nents; 2291b8d26b3bSNicholas Bellinger 2292b8d26b3bSNicholas Bellinger sg_off = offset / PAGE_SIZE; 2293b8d26b3bSNicholas Bellinger sg_start = &cmd->se_cmd.t_data_sg[sg_off]; 2294b8d26b3bSNicholas Bellinger sg_nents = min(cmd->se_cmd.t_data_nents - sg_off, isert_conn->max_sge); 2295b8d26b3bSNicholas Bellinger page_off = offset % PAGE_SIZE; 2296b8d26b3bSNicholas Bellinger 2297b8d26b3bSNicholas Bellinger send_wr->sg_list = ib_sge; 2298b8d26b3bSNicholas Bellinger send_wr->num_sge = sg_nents; 2299b8d26b3bSNicholas Bellinger send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc; 2300b8d26b3bSNicholas Bellinger /* 2301b8d26b3bSNicholas Bellinger * Perform mapping of TCM scatterlist memory ib_sge dma_addr. 2302b8d26b3bSNicholas Bellinger */ 2303b8d26b3bSNicholas Bellinger for_each_sg(sg_start, tmp_sg, sg_nents, i) { 2304b8d26b3bSNicholas Bellinger pr_debug("ISER RDMA from SGL dma_addr: 0x%16llx dma_len: %u, page_off: %u\n", 2305b8d26b3bSNicholas Bellinger (unsigned long long)tmp_sg->dma_address, 2306b8d26b3bSNicholas Bellinger tmp_sg->length, page_off); 2307b8d26b3bSNicholas Bellinger 2308b8d26b3bSNicholas Bellinger ib_sge->addr = ib_sg_dma_address(ib_dev, tmp_sg) + page_off; 2309b8d26b3bSNicholas Bellinger ib_sge->length = min_t(u32, data_left, 2310b8d26b3bSNicholas Bellinger ib_sg_dma_len(ib_dev, tmp_sg) - page_off); 2311b8d26b3bSNicholas Bellinger ib_sge->lkey = isert_conn->conn_mr->lkey; 2312b8d26b3bSNicholas Bellinger 231390ecc6e2SVu Pham pr_debug("RDMA ib_sge: addr: 0x%16llx length: %u lkey: %08x\n", 231490ecc6e2SVu Pham ib_sge->addr, ib_sge->length, ib_sge->lkey); 2315b8d26b3bSNicholas Bellinger page_off = 0; 2316b8d26b3bSNicholas Bellinger data_left -= ib_sge->length; 2317b8d26b3bSNicholas Bellinger ib_sge++; 2318b8d26b3bSNicholas Bellinger pr_debug("Incrementing ib_sge pointer to %p\n", ib_sge); 2319b8d26b3bSNicholas Bellinger } 2320b8d26b3bSNicholas Bellinger 2321b8d26b3bSNicholas Bellinger pr_debug("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n", 2322b8d26b3bSNicholas Bellinger send_wr->sg_list, send_wr->num_sge); 2323b8d26b3bSNicholas Bellinger 2324b8d26b3bSNicholas Bellinger return sg_nents; 2325b8d26b3bSNicholas Bellinger } 2326b8d26b3bSNicholas Bellinger 2327b8d26b3bSNicholas Bellinger static int 232890ecc6e2SVu Pham isert_map_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 232990ecc6e2SVu Pham struct isert_rdma_wr *wr) 2330b8d26b3bSNicholas Bellinger { 2331b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 2332d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2333b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2334e3d7e4c3SSagi Grimberg struct isert_data_buf *data = &wr->data; 233590ecc6e2SVu Pham struct ib_send_wr *send_wr; 2336b8d26b3bSNicholas Bellinger struct ib_sge *ib_sge; 2337e3d7e4c3SSagi Grimberg u32 offset, data_len, data_left, rdma_write_max, va_offset = 0; 2338e3d7e4c3SSagi Grimberg int ret = 0, i, ib_sge_cnt; 2339b8d26b3bSNicholas Bellinger 234090ecc6e2SVu Pham isert_cmd->tx_desc.isert_cmd = isert_cmd; 2341b8d26b3bSNicholas Bellinger 2342e3d7e4c3SSagi Grimberg offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; 2343e3d7e4c3SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, 2344e3d7e4c3SSagi Grimberg se_cmd->t_data_nents, se_cmd->data_length, 2345e3d7e4c3SSagi Grimberg offset, wr->iser_ib_op, &wr->data); 2346e3d7e4c3SSagi Grimberg if (ret) 2347e3d7e4c3SSagi Grimberg return ret; 2348b8d26b3bSNicholas Bellinger 2349e3d7e4c3SSagi Grimberg data_left = data->len; 2350e3d7e4c3SSagi Grimberg offset = data->offset; 2351b8d26b3bSNicholas Bellinger 2352e3d7e4c3SSagi Grimberg ib_sge = kzalloc(sizeof(struct ib_sge) * data->nents, GFP_KERNEL); 2353b8d26b3bSNicholas Bellinger if (!ib_sge) { 235490ecc6e2SVu Pham pr_warn("Unable to allocate ib_sge\n"); 2355b8d26b3bSNicholas Bellinger ret = -ENOMEM; 2356e3d7e4c3SSagi Grimberg goto unmap_cmd; 2357b8d26b3bSNicholas Bellinger } 235890ecc6e2SVu Pham wr->ib_sge = ib_sge; 2359b8d26b3bSNicholas Bellinger 2360e3d7e4c3SSagi Grimberg wr->send_wr_num = DIV_ROUND_UP(data->nents, isert_conn->max_sge); 2361b8d26b3bSNicholas Bellinger wr->send_wr = kzalloc(sizeof(struct ib_send_wr) * wr->send_wr_num, 2362b8d26b3bSNicholas Bellinger GFP_KERNEL); 2363b8d26b3bSNicholas Bellinger if (!wr->send_wr) { 236490ecc6e2SVu Pham pr_debug("Unable to allocate wr->send_wr\n"); 2365b8d26b3bSNicholas Bellinger ret = -ENOMEM; 2366e3d7e4c3SSagi Grimberg goto unmap_cmd; 2367b8d26b3bSNicholas Bellinger } 2368b8d26b3bSNicholas Bellinger 2369b8d26b3bSNicholas Bellinger wr->isert_cmd = isert_cmd; 2370b8d26b3bSNicholas Bellinger rdma_write_max = isert_conn->max_sge * PAGE_SIZE; 2371b8d26b3bSNicholas Bellinger 2372b8d26b3bSNicholas Bellinger for (i = 0; i < wr->send_wr_num; i++) { 2373b8d26b3bSNicholas Bellinger send_wr = &isert_cmd->rdma_wr.send_wr[i]; 2374b8d26b3bSNicholas Bellinger data_len = min(data_left, rdma_write_max); 2375b8d26b3bSNicholas Bellinger 2376b8d26b3bSNicholas Bellinger send_wr->send_flags = 0; 237790ecc6e2SVu Pham if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { 237890ecc6e2SVu Pham send_wr->opcode = IB_WR_RDMA_WRITE; 2379b8d26b3bSNicholas Bellinger send_wr->wr.rdma.remote_addr = isert_cmd->read_va + offset; 2380b8d26b3bSNicholas Bellinger send_wr->wr.rdma.rkey = isert_cmd->read_stag; 238190ecc6e2SVu Pham if (i + 1 == wr->send_wr_num) 238290ecc6e2SVu Pham send_wr->next = &isert_cmd->tx_desc.send_wr; 238390ecc6e2SVu Pham else 238490ecc6e2SVu Pham send_wr->next = &wr->send_wr[i + 1]; 238590ecc6e2SVu Pham } else { 238690ecc6e2SVu Pham send_wr->opcode = IB_WR_RDMA_READ; 238790ecc6e2SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->write_va + va_offset; 238890ecc6e2SVu Pham send_wr->wr.rdma.rkey = isert_cmd->write_stag; 238990ecc6e2SVu Pham if (i + 1 == wr->send_wr_num) 239090ecc6e2SVu Pham send_wr->send_flags = IB_SEND_SIGNALED; 239190ecc6e2SVu Pham else 239290ecc6e2SVu Pham send_wr->next = &wr->send_wr[i + 1]; 239390ecc6e2SVu Pham } 2394b8d26b3bSNicholas Bellinger 2395b8d26b3bSNicholas Bellinger ib_sge_cnt = isert_build_rdma_wr(isert_conn, isert_cmd, ib_sge, 2396b8d26b3bSNicholas Bellinger send_wr, data_len, offset); 2397b8d26b3bSNicholas Bellinger ib_sge += ib_sge_cnt; 2398b8d26b3bSNicholas Bellinger 2399b8d26b3bSNicholas Bellinger offset += data_len; 240090ecc6e2SVu Pham va_offset += data_len; 2401b8d26b3bSNicholas Bellinger data_left -= data_len; 2402b8d26b3bSNicholas Bellinger } 240390ecc6e2SVu Pham 240490ecc6e2SVu Pham return 0; 2405e3d7e4c3SSagi Grimberg unmap_cmd: 2406e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, data); 2407e3d7e4c3SSagi Grimberg 240890ecc6e2SVu Pham return ret; 240990ecc6e2SVu Pham } 241090ecc6e2SVu Pham 241190ecc6e2SVu Pham static int 241259464ef4SVu Pham isert_map_fr_pagelist(struct ib_device *ib_dev, 241359464ef4SVu Pham struct scatterlist *sg_start, int sg_nents, u64 *fr_pl) 241459464ef4SVu Pham { 241559464ef4SVu Pham u64 start_addr, end_addr, page, chunk_start = 0; 241659464ef4SVu Pham struct scatterlist *tmp_sg; 241759464ef4SVu Pham int i = 0, new_chunk, last_ent, n_pages; 241859464ef4SVu Pham 241959464ef4SVu Pham n_pages = 0; 242059464ef4SVu Pham new_chunk = 1; 242159464ef4SVu Pham last_ent = sg_nents - 1; 242259464ef4SVu Pham for_each_sg(sg_start, tmp_sg, sg_nents, i) { 242359464ef4SVu Pham start_addr = ib_sg_dma_address(ib_dev, tmp_sg); 242459464ef4SVu Pham if (new_chunk) 242559464ef4SVu Pham chunk_start = start_addr; 242659464ef4SVu Pham end_addr = start_addr + ib_sg_dma_len(ib_dev, tmp_sg); 242759464ef4SVu Pham 242859464ef4SVu Pham pr_debug("SGL[%d] dma_addr: 0x%16llx len: %u\n", 242959464ef4SVu Pham i, (unsigned long long)tmp_sg->dma_address, 243059464ef4SVu Pham tmp_sg->length); 243159464ef4SVu Pham 243259464ef4SVu Pham if ((end_addr & ~PAGE_MASK) && i < last_ent) { 243359464ef4SVu Pham new_chunk = 0; 243459464ef4SVu Pham continue; 243559464ef4SVu Pham } 243659464ef4SVu Pham new_chunk = 1; 243759464ef4SVu Pham 243859464ef4SVu Pham page = chunk_start & PAGE_MASK; 243959464ef4SVu Pham do { 244059464ef4SVu Pham fr_pl[n_pages++] = page; 244159464ef4SVu Pham pr_debug("Mapped page_list[%d] page_addr: 0x%16llx\n", 244259464ef4SVu Pham n_pages - 1, page); 244359464ef4SVu Pham page += PAGE_SIZE; 244459464ef4SVu Pham } while (page < end_addr); 244559464ef4SVu Pham } 244659464ef4SVu Pham 244759464ef4SVu Pham return n_pages; 244859464ef4SVu Pham } 244959464ef4SVu Pham 245059464ef4SVu Pham static int 2451e3d7e4c3SSagi Grimberg isert_fast_reg_mr(struct isert_conn *isert_conn, 2452e3d7e4c3SSagi Grimberg struct fast_reg_descriptor *fr_desc, 2453e3d7e4c3SSagi Grimberg struct isert_data_buf *mem, 24549e961ae7SSagi Grimberg enum isert_indicator ind, 2455e3d7e4c3SSagi Grimberg struct ib_sge *sge) 245659464ef4SVu Pham { 245759464ef4SVu Pham struct ib_device *ib_dev = isert_conn->conn_cm_id->device; 24589e961ae7SSagi Grimberg struct ib_mr *mr; 24599e961ae7SSagi Grimberg struct ib_fast_reg_page_list *frpl; 246059464ef4SVu Pham struct ib_send_wr fr_wr, inv_wr; 246159464ef4SVu Pham struct ib_send_wr *bad_wr, *wr = NULL; 24629bd626e7SSagi Grimberg int ret, pagelist_len; 24639bd626e7SSagi Grimberg u32 page_off; 246459464ef4SVu Pham u8 key; 246559464ef4SVu Pham 2466e3d7e4c3SSagi Grimberg if (mem->dma_nents == 1) { 2467e3d7e4c3SSagi Grimberg sge->lkey = isert_conn->conn_mr->lkey; 2468e3d7e4c3SSagi Grimberg sge->addr = ib_sg_dma_address(ib_dev, &mem->sg[0]); 2469e3d7e4c3SSagi Grimberg sge->length = ib_sg_dma_len(ib_dev, &mem->sg[0]); 24709e961ae7SSagi Grimberg pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n", 24719e961ae7SSagi Grimberg __func__, __LINE__, sge->addr, sge->length, 24729e961ae7SSagi Grimberg sge->lkey); 2473e3d7e4c3SSagi Grimberg return 0; 2474e3d7e4c3SSagi Grimberg } 2475e3d7e4c3SSagi Grimberg 24769e961ae7SSagi Grimberg if (ind == ISERT_DATA_KEY_VALID) { 24779e961ae7SSagi Grimberg /* Registering data buffer */ 24789e961ae7SSagi Grimberg mr = fr_desc->data_mr; 24799e961ae7SSagi Grimberg frpl = fr_desc->data_frpl; 24809e961ae7SSagi Grimberg } else { 24819e961ae7SSagi Grimberg /* Registering protection buffer */ 24829e961ae7SSagi Grimberg mr = fr_desc->pi_ctx->prot_mr; 24839e961ae7SSagi Grimberg frpl = fr_desc->pi_ctx->prot_frpl; 24849e961ae7SSagi Grimberg } 24859e961ae7SSagi Grimberg 2486e3d7e4c3SSagi Grimberg page_off = mem->offset % PAGE_SIZE; 248759464ef4SVu Pham 24889bd626e7SSagi Grimberg pr_debug("Use fr_desc %p sg_nents %d offset %u\n", 2489e3d7e4c3SSagi Grimberg fr_desc, mem->nents, mem->offset); 249059464ef4SVu Pham 2491e3d7e4c3SSagi Grimberg pagelist_len = isert_map_fr_pagelist(ib_dev, mem->sg, mem->nents, 24929e961ae7SSagi Grimberg &frpl->page_list[0]); 249359464ef4SVu Pham 2494d3e125daSSagi Grimberg if (!(fr_desc->ind & ISERT_DATA_KEY_VALID)) { 249559464ef4SVu Pham memset(&inv_wr, 0, sizeof(inv_wr)); 24969bb4ca68SNicholas Bellinger inv_wr.wr_id = ISER_FASTREG_LI_WRID; 249759464ef4SVu Pham inv_wr.opcode = IB_WR_LOCAL_INV; 24989e961ae7SSagi Grimberg inv_wr.ex.invalidate_rkey = mr->rkey; 249959464ef4SVu Pham wr = &inv_wr; 250059464ef4SVu Pham /* Bump the key */ 25019e961ae7SSagi Grimberg key = (u8)(mr->rkey & 0x000000FF); 25029e961ae7SSagi Grimberg ib_update_fast_reg_key(mr, ++key); 250359464ef4SVu Pham } 250459464ef4SVu Pham 250559464ef4SVu Pham /* Prepare FASTREG WR */ 250659464ef4SVu Pham memset(&fr_wr, 0, sizeof(fr_wr)); 25079bb4ca68SNicholas Bellinger fr_wr.wr_id = ISER_FASTREG_LI_WRID; 250859464ef4SVu Pham fr_wr.opcode = IB_WR_FAST_REG_MR; 25099e961ae7SSagi Grimberg fr_wr.wr.fast_reg.iova_start = frpl->page_list[0] + page_off; 25109e961ae7SSagi Grimberg fr_wr.wr.fast_reg.page_list = frpl; 251159464ef4SVu Pham fr_wr.wr.fast_reg.page_list_len = pagelist_len; 251259464ef4SVu Pham fr_wr.wr.fast_reg.page_shift = PAGE_SHIFT; 2513e3d7e4c3SSagi Grimberg fr_wr.wr.fast_reg.length = mem->len; 25149e961ae7SSagi Grimberg fr_wr.wr.fast_reg.rkey = mr->rkey; 251559464ef4SVu Pham fr_wr.wr.fast_reg.access_flags = IB_ACCESS_LOCAL_WRITE; 251659464ef4SVu Pham 251759464ef4SVu Pham if (!wr) 251859464ef4SVu Pham wr = &fr_wr; 251959464ef4SVu Pham else 252059464ef4SVu Pham wr->next = &fr_wr; 252159464ef4SVu Pham 252259464ef4SVu Pham ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr); 252359464ef4SVu Pham if (ret) { 252459464ef4SVu Pham pr_err("fast registration failed, ret:%d\n", ret); 252559464ef4SVu Pham return ret; 252659464ef4SVu Pham } 25279e961ae7SSagi Grimberg fr_desc->ind &= ~ind; 252859464ef4SVu Pham 25299e961ae7SSagi Grimberg sge->lkey = mr->lkey; 25309e961ae7SSagi Grimberg sge->addr = frpl->page_list[0] + page_off; 2531e3d7e4c3SSagi Grimberg sge->length = mem->len; 253259464ef4SVu Pham 25339e961ae7SSagi Grimberg pr_debug("%s:%d sge: addr: 0x%llx length: %u lkey: %x\n", 25349e961ae7SSagi Grimberg __func__, __LINE__, sge->addr, sge->length, 25359e961ae7SSagi Grimberg sge->lkey); 253659464ef4SVu Pham 253759464ef4SVu Pham return ret; 253859464ef4SVu Pham } 253959464ef4SVu Pham 25409e961ae7SSagi Grimberg static inline enum ib_t10_dif_type 25419e961ae7SSagi Grimberg se2ib_prot_type(enum target_prot_type prot_type) 25429e961ae7SSagi Grimberg { 25439e961ae7SSagi Grimberg switch (prot_type) { 25449e961ae7SSagi Grimberg case TARGET_DIF_TYPE0_PROT: 25459e961ae7SSagi Grimberg return IB_T10DIF_NONE; 25469e961ae7SSagi Grimberg case TARGET_DIF_TYPE1_PROT: 25479e961ae7SSagi Grimberg return IB_T10DIF_TYPE1; 25489e961ae7SSagi Grimberg case TARGET_DIF_TYPE2_PROT: 25499e961ae7SSagi Grimberg return IB_T10DIF_TYPE2; 25509e961ae7SSagi Grimberg case TARGET_DIF_TYPE3_PROT: 25519e961ae7SSagi Grimberg return IB_T10DIF_TYPE3; 25529e961ae7SSagi Grimberg default: 25539e961ae7SSagi Grimberg return IB_T10DIF_NONE; 25549e961ae7SSagi Grimberg } 25559e961ae7SSagi Grimberg } 25569e961ae7SSagi Grimberg 25579e961ae7SSagi Grimberg static int 25589e961ae7SSagi Grimberg isert_set_sig_attrs(struct se_cmd *se_cmd, struct ib_sig_attrs *sig_attrs) 25599e961ae7SSagi Grimberg { 25609e961ae7SSagi Grimberg enum ib_t10_dif_type ib_prot_type = se2ib_prot_type(se_cmd->prot_type); 25619e961ae7SSagi Grimberg 25629e961ae7SSagi Grimberg sig_attrs->mem.sig_type = IB_SIG_TYPE_T10_DIF; 25639e961ae7SSagi Grimberg sig_attrs->wire.sig_type = IB_SIG_TYPE_T10_DIF; 25649e961ae7SSagi Grimberg sig_attrs->mem.sig.dif.pi_interval = 25659e961ae7SSagi Grimberg se_cmd->se_dev->dev_attrib.block_size; 25669e961ae7SSagi Grimberg sig_attrs->wire.sig.dif.pi_interval = 25679e961ae7SSagi Grimberg se_cmd->se_dev->dev_attrib.block_size; 25689e961ae7SSagi Grimberg 25699e961ae7SSagi Grimberg switch (se_cmd->prot_op) { 25709e961ae7SSagi Grimberg case TARGET_PROT_DIN_INSERT: 25719e961ae7SSagi Grimberg case TARGET_PROT_DOUT_STRIP: 25729e961ae7SSagi Grimberg sig_attrs->mem.sig.dif.type = IB_T10DIF_NONE; 25739e961ae7SSagi Grimberg sig_attrs->wire.sig.dif.type = ib_prot_type; 25749e961ae7SSagi Grimberg sig_attrs->wire.sig.dif.bg_type = IB_T10DIF_CRC; 25759e961ae7SSagi Grimberg sig_attrs->wire.sig.dif.ref_tag = se_cmd->reftag_seed; 25769e961ae7SSagi Grimberg break; 25779e961ae7SSagi Grimberg case TARGET_PROT_DOUT_INSERT: 25789e961ae7SSagi Grimberg case TARGET_PROT_DIN_STRIP: 25799e961ae7SSagi Grimberg sig_attrs->mem.sig.dif.type = ib_prot_type; 25809e961ae7SSagi Grimberg sig_attrs->mem.sig.dif.bg_type = IB_T10DIF_CRC; 25819e961ae7SSagi Grimberg sig_attrs->mem.sig.dif.ref_tag = se_cmd->reftag_seed; 25829e961ae7SSagi Grimberg sig_attrs->wire.sig.dif.type = IB_T10DIF_NONE; 25839e961ae7SSagi Grimberg break; 25849e961ae7SSagi Grimberg case TARGET_PROT_DIN_PASS: 25859e961ae7SSagi Grimberg case TARGET_PROT_DOUT_PASS: 25869e961ae7SSagi Grimberg sig_attrs->mem.sig.dif.type = ib_prot_type; 25879e961ae7SSagi Grimberg sig_attrs->mem.sig.dif.bg_type = IB_T10DIF_CRC; 25889e961ae7SSagi Grimberg sig_attrs->mem.sig.dif.ref_tag = se_cmd->reftag_seed; 25899e961ae7SSagi Grimberg sig_attrs->wire.sig.dif.type = ib_prot_type; 25909e961ae7SSagi Grimberg sig_attrs->wire.sig.dif.bg_type = IB_T10DIF_CRC; 25919e961ae7SSagi Grimberg sig_attrs->wire.sig.dif.ref_tag = se_cmd->reftag_seed; 25929e961ae7SSagi Grimberg break; 25939e961ae7SSagi Grimberg default: 25949e961ae7SSagi Grimberg pr_err("Unsupported PI operation %d\n", se_cmd->prot_op); 25959e961ae7SSagi Grimberg return -EINVAL; 25969e961ae7SSagi Grimberg } 25979e961ae7SSagi Grimberg 25989e961ae7SSagi Grimberg return 0; 25999e961ae7SSagi Grimberg } 26009e961ae7SSagi Grimberg 26019e961ae7SSagi Grimberg static inline u8 26029e961ae7SSagi Grimberg isert_set_prot_checks(u8 prot_checks) 26039e961ae7SSagi Grimberg { 26049e961ae7SSagi Grimberg return (prot_checks & TARGET_DIF_CHECK_GUARD ? 0xc0 : 0) | 26059e961ae7SSagi Grimberg (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x30 : 0) | 26069e961ae7SSagi Grimberg (prot_checks & TARGET_DIF_CHECK_REFTAG ? 0x0f : 0); 26079e961ae7SSagi Grimberg } 26089e961ae7SSagi Grimberg 26099e961ae7SSagi Grimberg static int 26109e961ae7SSagi Grimberg isert_reg_sig_mr(struct isert_conn *isert_conn, struct se_cmd *se_cmd, 26119e961ae7SSagi Grimberg struct fast_reg_descriptor *fr_desc, 26129e961ae7SSagi Grimberg struct ib_sge *data_sge, struct ib_sge *prot_sge, 26139e961ae7SSagi Grimberg struct ib_sge *sig_sge) 26149e961ae7SSagi Grimberg { 26159e961ae7SSagi Grimberg struct ib_send_wr sig_wr, inv_wr; 26169e961ae7SSagi Grimberg struct ib_send_wr *bad_wr, *wr = NULL; 26179e961ae7SSagi Grimberg struct pi_context *pi_ctx = fr_desc->pi_ctx; 26189e961ae7SSagi Grimberg struct ib_sig_attrs sig_attrs; 26199e961ae7SSagi Grimberg int ret; 26209e961ae7SSagi Grimberg u32 key; 26219e961ae7SSagi Grimberg 26229e961ae7SSagi Grimberg memset(&sig_attrs, 0, sizeof(sig_attrs)); 26239e961ae7SSagi Grimberg ret = isert_set_sig_attrs(se_cmd, &sig_attrs); 26249e961ae7SSagi Grimberg if (ret) 26259e961ae7SSagi Grimberg goto err; 26269e961ae7SSagi Grimberg 26279e961ae7SSagi Grimberg sig_attrs.check_mask = isert_set_prot_checks(se_cmd->prot_checks); 26289e961ae7SSagi Grimberg 26299e961ae7SSagi Grimberg if (!(fr_desc->ind & ISERT_SIG_KEY_VALID)) { 26309e961ae7SSagi Grimberg memset(&inv_wr, 0, sizeof(inv_wr)); 26319e961ae7SSagi Grimberg inv_wr.opcode = IB_WR_LOCAL_INV; 2632c2caa207SSagi Grimberg inv_wr.wr_id = ISER_FASTREG_LI_WRID; 26339e961ae7SSagi Grimberg inv_wr.ex.invalidate_rkey = pi_ctx->sig_mr->rkey; 26349e961ae7SSagi Grimberg wr = &inv_wr; 26359e961ae7SSagi Grimberg /* Bump the key */ 26369e961ae7SSagi Grimberg key = (u8)(pi_ctx->sig_mr->rkey & 0x000000FF); 26379e961ae7SSagi Grimberg ib_update_fast_reg_key(pi_ctx->sig_mr, ++key); 26389e961ae7SSagi Grimberg } 26399e961ae7SSagi Grimberg 26409e961ae7SSagi Grimberg memset(&sig_wr, 0, sizeof(sig_wr)); 26419e961ae7SSagi Grimberg sig_wr.opcode = IB_WR_REG_SIG_MR; 2642c2caa207SSagi Grimberg sig_wr.wr_id = ISER_FASTREG_LI_WRID; 26439e961ae7SSagi Grimberg sig_wr.sg_list = data_sge; 26449e961ae7SSagi Grimberg sig_wr.num_sge = 1; 26459e961ae7SSagi Grimberg sig_wr.wr.sig_handover.access_flags = IB_ACCESS_LOCAL_WRITE; 26469e961ae7SSagi Grimberg sig_wr.wr.sig_handover.sig_attrs = &sig_attrs; 26479e961ae7SSagi Grimberg sig_wr.wr.sig_handover.sig_mr = pi_ctx->sig_mr; 26489e961ae7SSagi Grimberg if (se_cmd->t_prot_sg) 26499e961ae7SSagi Grimberg sig_wr.wr.sig_handover.prot = prot_sge; 26509e961ae7SSagi Grimberg 26519e961ae7SSagi Grimberg if (!wr) 26529e961ae7SSagi Grimberg wr = &sig_wr; 26539e961ae7SSagi Grimberg else 26549e961ae7SSagi Grimberg wr->next = &sig_wr; 26559e961ae7SSagi Grimberg 26569e961ae7SSagi Grimberg ret = ib_post_send(isert_conn->conn_qp, wr, &bad_wr); 26579e961ae7SSagi Grimberg if (ret) { 26589e961ae7SSagi Grimberg pr_err("fast registration failed, ret:%d\n", ret); 26599e961ae7SSagi Grimberg goto err; 26609e961ae7SSagi Grimberg } 26619e961ae7SSagi Grimberg fr_desc->ind &= ~ISERT_SIG_KEY_VALID; 26629e961ae7SSagi Grimberg 26639e961ae7SSagi Grimberg sig_sge->lkey = pi_ctx->sig_mr->lkey; 26649e961ae7SSagi Grimberg sig_sge->addr = 0; 26659e961ae7SSagi Grimberg sig_sge->length = se_cmd->data_length; 26669e961ae7SSagi Grimberg if (se_cmd->prot_op != TARGET_PROT_DIN_STRIP && 26679e961ae7SSagi Grimberg se_cmd->prot_op != TARGET_PROT_DOUT_INSERT) 26689e961ae7SSagi Grimberg /* 26699e961ae7SSagi Grimberg * We have protection guards on the wire 26709e961ae7SSagi Grimberg * so we need to set a larget transfer 26719e961ae7SSagi Grimberg */ 26729e961ae7SSagi Grimberg sig_sge->length += se_cmd->prot_length; 26739e961ae7SSagi Grimberg 26749e961ae7SSagi Grimberg pr_debug("sig_sge: addr: 0x%llx length: %u lkey: %x\n", 26759e961ae7SSagi Grimberg sig_sge->addr, sig_sge->length, 26769e961ae7SSagi Grimberg sig_sge->lkey); 26779e961ae7SSagi Grimberg err: 26789e961ae7SSagi Grimberg return ret; 26799e961ae7SSagi Grimberg } 26809e961ae7SSagi Grimberg 268159464ef4SVu Pham static int 2682a3a5a826SSagi Grimberg isert_reg_rdma(struct iscsi_conn *conn, struct iscsi_cmd *cmd, 268359464ef4SVu Pham struct isert_rdma_wr *wr) 268459464ef4SVu Pham { 268559464ef4SVu Pham struct se_cmd *se_cmd = &cmd->se_cmd; 268659464ef4SVu Pham struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2687e3d7e4c3SSagi Grimberg struct isert_conn *isert_conn = conn->context; 26889e961ae7SSagi Grimberg struct ib_sge data_sge; 268959464ef4SVu Pham struct ib_send_wr *send_wr; 2690e3d7e4c3SSagi Grimberg struct fast_reg_descriptor *fr_desc = NULL; 2691e3d7e4c3SSagi Grimberg u32 offset; 2692e3d7e4c3SSagi Grimberg int ret = 0; 269359464ef4SVu Pham unsigned long flags; 269459464ef4SVu Pham 269559464ef4SVu Pham isert_cmd->tx_desc.isert_cmd = isert_cmd; 2696e3d7e4c3SSagi Grimberg 2697e3d7e4c3SSagi Grimberg offset = wr->iser_ib_op == ISER_IB_RDMA_READ ? cmd->write_data_done : 0; 2698e3d7e4c3SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg, 2699e3d7e4c3SSagi Grimberg se_cmd->t_data_nents, se_cmd->data_length, 2700e3d7e4c3SSagi Grimberg offset, wr->iser_ib_op, &wr->data); 2701e3d7e4c3SSagi Grimberg if (ret) 2702e3d7e4c3SSagi Grimberg return ret; 2703e3d7e4c3SSagi Grimberg 27049e961ae7SSagi Grimberg if (wr->data.dma_nents != 1 || 27059e961ae7SSagi Grimberg se_cmd->prot_op != TARGET_PROT_NORMAL) { 2706e3d7e4c3SSagi Grimberg spin_lock_irqsave(&isert_conn->conn_lock, flags); 2707e3d7e4c3SSagi Grimberg fr_desc = list_first_entry(&isert_conn->conn_fr_pool, 2708e3d7e4c3SSagi Grimberg struct fast_reg_descriptor, list); 2709e3d7e4c3SSagi Grimberg list_del(&fr_desc->list); 2710e3d7e4c3SSagi Grimberg spin_unlock_irqrestore(&isert_conn->conn_lock, flags); 2711e3d7e4c3SSagi Grimberg wr->fr_desc = fr_desc; 271259464ef4SVu Pham } 271359464ef4SVu Pham 27149e961ae7SSagi Grimberg ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->data, 27159e961ae7SSagi Grimberg ISERT_DATA_KEY_VALID, &data_sge); 2716e3d7e4c3SSagi Grimberg if (ret) 2717e3d7e4c3SSagi Grimberg goto unmap_cmd; 271859464ef4SVu Pham 27199e961ae7SSagi Grimberg if (se_cmd->prot_op != TARGET_PROT_NORMAL) { 27209e961ae7SSagi Grimberg struct ib_sge prot_sge, sig_sge; 27219e961ae7SSagi Grimberg 27229e961ae7SSagi Grimberg if (se_cmd->t_prot_sg) { 27239e961ae7SSagi Grimberg ret = isert_map_data_buf(isert_conn, isert_cmd, 27249e961ae7SSagi Grimberg se_cmd->t_prot_sg, 27259e961ae7SSagi Grimberg se_cmd->t_prot_nents, 27269e961ae7SSagi Grimberg se_cmd->prot_length, 27279e961ae7SSagi Grimberg 0, wr->iser_ib_op, &wr->prot); 27289e961ae7SSagi Grimberg if (ret) 27299e961ae7SSagi Grimberg goto unmap_cmd; 27309e961ae7SSagi Grimberg 27319e961ae7SSagi Grimberg ret = isert_fast_reg_mr(isert_conn, fr_desc, &wr->prot, 27329e961ae7SSagi Grimberg ISERT_PROT_KEY_VALID, &prot_sge); 27339e961ae7SSagi Grimberg if (ret) 27349e961ae7SSagi Grimberg goto unmap_prot_cmd; 27359e961ae7SSagi Grimberg } 27369e961ae7SSagi Grimberg 27379e961ae7SSagi Grimberg ret = isert_reg_sig_mr(isert_conn, se_cmd, fr_desc, 27389e961ae7SSagi Grimberg &data_sge, &prot_sge, &sig_sge); 27399e961ae7SSagi Grimberg if (ret) 27409e961ae7SSagi Grimberg goto unmap_prot_cmd; 27419e961ae7SSagi Grimberg 27429e961ae7SSagi Grimberg fr_desc->ind |= ISERT_PROTECTED; 27439e961ae7SSagi Grimberg memcpy(&wr->s_ib_sge, &sig_sge, sizeof(sig_sge)); 27449e961ae7SSagi Grimberg } else 27459e961ae7SSagi Grimberg memcpy(&wr->s_ib_sge, &data_sge, sizeof(data_sge)); 27469e961ae7SSagi Grimberg 2747e3d7e4c3SSagi Grimberg wr->ib_sge = &wr->s_ib_sge; 274859464ef4SVu Pham wr->send_wr_num = 1; 274959464ef4SVu Pham memset(&wr->s_send_wr, 0, sizeof(*send_wr)); 275059464ef4SVu Pham wr->send_wr = &wr->s_send_wr; 275159464ef4SVu Pham wr->isert_cmd = isert_cmd; 275259464ef4SVu Pham 275359464ef4SVu Pham send_wr = &isert_cmd->rdma_wr.s_send_wr; 2754e3d7e4c3SSagi Grimberg send_wr->sg_list = &wr->s_ib_sge; 275559464ef4SVu Pham send_wr->num_sge = 1; 275659464ef4SVu Pham send_wr->wr_id = (unsigned long)&isert_cmd->tx_desc; 275759464ef4SVu Pham if (wr->iser_ib_op == ISER_IB_RDMA_WRITE) { 275859464ef4SVu Pham send_wr->opcode = IB_WR_RDMA_WRITE; 275959464ef4SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->read_va; 276059464ef4SVu Pham send_wr->wr.rdma.rkey = isert_cmd->read_stag; 27619e961ae7SSagi Grimberg send_wr->send_flags = se_cmd->prot_op == TARGET_PROT_NORMAL ? 27629e961ae7SSagi Grimberg 0 : IB_SEND_SIGNALED; 276359464ef4SVu Pham } else { 276459464ef4SVu Pham send_wr->opcode = IB_WR_RDMA_READ; 276559464ef4SVu Pham send_wr->wr.rdma.remote_addr = isert_cmd->write_va; 276659464ef4SVu Pham send_wr->wr.rdma.rkey = isert_cmd->write_stag; 276759464ef4SVu Pham send_wr->send_flags = IB_SEND_SIGNALED; 276859464ef4SVu Pham } 276959464ef4SVu Pham 277059464ef4SVu Pham return 0; 27719e961ae7SSagi Grimberg unmap_prot_cmd: 27729e961ae7SSagi Grimberg if (se_cmd->t_prot_sg) 27739e961ae7SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->prot); 2774e3d7e4c3SSagi Grimberg unmap_cmd: 2775e3d7e4c3SSagi Grimberg if (fr_desc) { 2776e3d7e4c3SSagi Grimberg spin_lock_irqsave(&isert_conn->conn_lock, flags); 2777e3d7e4c3SSagi Grimberg list_add_tail(&fr_desc->list, &isert_conn->conn_fr_pool); 2778e3d7e4c3SSagi Grimberg spin_unlock_irqrestore(&isert_conn->conn_lock, flags); 2779e3d7e4c3SSagi Grimberg } 2780e3d7e4c3SSagi Grimberg isert_unmap_data_buf(isert_conn, &wr->data); 278159464ef4SVu Pham 278259464ef4SVu Pham return ret; 278359464ef4SVu Pham } 278459464ef4SVu Pham 278559464ef4SVu Pham static int 278690ecc6e2SVu Pham isert_put_datain(struct iscsi_conn *conn, struct iscsi_cmd *cmd) 278790ecc6e2SVu Pham { 278890ecc6e2SVu Pham struct se_cmd *se_cmd = &cmd->se_cmd; 278959464ef4SVu Pham struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 279090ecc6e2SVu Pham struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 279190ecc6e2SVu Pham struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2792d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 279390ecc6e2SVu Pham struct ib_send_wr *wr_failed; 279490ecc6e2SVu Pham int rc; 279590ecc6e2SVu Pham 279690ecc6e2SVu Pham pr_debug("Cmd: %p RDMA_WRITE data_length: %u\n", 279790ecc6e2SVu Pham isert_cmd, se_cmd->data_length); 279890ecc6e2SVu Pham wr->iser_ib_op = ISER_IB_RDMA_WRITE; 2799d40945d8SVu Pham rc = device->reg_rdma_mem(conn, cmd, wr); 280090ecc6e2SVu Pham if (rc) { 280190ecc6e2SVu Pham pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); 280290ecc6e2SVu Pham return rc; 280390ecc6e2SVu Pham } 280490ecc6e2SVu Pham 28059e961ae7SSagi Grimberg if (se_cmd->prot_op == TARGET_PROT_NORMAL) { 2806b8d26b3bSNicholas Bellinger /* 2807b8d26b3bSNicholas Bellinger * Build isert_conn->tx_desc for iSCSI response PDU and attach 2808b8d26b3bSNicholas Bellinger */ 28099e961ae7SSagi Grimberg isert_create_send_desc(isert_conn, isert_cmd, 28109e961ae7SSagi Grimberg &isert_cmd->tx_desc); 281104d9cd12SNicholas Bellinger iscsit_build_rsp_pdu(cmd, conn, true, (struct iscsi_scsi_rsp *) 2812b8d26b3bSNicholas Bellinger &isert_cmd->tx_desc.iscsi_header); 2813b8d26b3bSNicholas Bellinger isert_init_tx_hdrs(isert_conn, &isert_cmd->tx_desc); 281495b60f07SNicholas Bellinger isert_init_send_wr(isert_conn, isert_cmd, 281595b60f07SNicholas Bellinger &isert_cmd->tx_desc.send_wr, true); 28169e961ae7SSagi Grimberg isert_cmd->rdma_wr.s_send_wr.next = &isert_cmd->tx_desc.send_wr; 2817897bb2c9SSagi Grimberg wr->send_wr_num += 1; 28189e961ae7SSagi Grimberg } 2819b8d26b3bSNicholas Bellinger 2820897bb2c9SSagi Grimberg atomic_add(wr->send_wr_num, &isert_conn->post_send_buf_count); 2821b8d26b3bSNicholas Bellinger 2822b8d26b3bSNicholas Bellinger rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); 2823b8d26b3bSNicholas Bellinger if (rc) { 2824b8d26b3bSNicholas Bellinger pr_warn("ib_post_send() failed for IB_WR_RDMA_WRITE\n"); 2825897bb2c9SSagi Grimberg atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); 2826b8d26b3bSNicholas Bellinger } 28279e961ae7SSagi Grimberg 28289e961ae7SSagi Grimberg if (se_cmd->prot_op == TARGET_PROT_NORMAL) 28299e961ae7SSagi Grimberg pr_debug("Cmd: %p posted RDMA_WRITE + Response for iSER Data " 28309e961ae7SSagi Grimberg "READ\n", isert_cmd); 28319e961ae7SSagi Grimberg else 28329e961ae7SSagi Grimberg pr_debug("Cmd: %p posted RDMA_WRITE for iSER Data READ\n", 283390ecc6e2SVu Pham isert_cmd); 2834b8d26b3bSNicholas Bellinger 283590ecc6e2SVu Pham return 1; 2836b8d26b3bSNicholas Bellinger } 2837b8d26b3bSNicholas Bellinger 2838b8d26b3bSNicholas Bellinger static int 2839b8d26b3bSNicholas Bellinger isert_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd, bool recovery) 2840b8d26b3bSNicholas Bellinger { 2841b8d26b3bSNicholas Bellinger struct se_cmd *se_cmd = &cmd->se_cmd; 2842d703ce2fSNicholas Bellinger struct isert_cmd *isert_cmd = iscsit_priv_cmd(cmd); 2843b8d26b3bSNicholas Bellinger struct isert_rdma_wr *wr = &isert_cmd->rdma_wr; 2844b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 2845d40945d8SVu Pham struct isert_device *device = isert_conn->conn_device; 284690ecc6e2SVu Pham struct ib_send_wr *wr_failed; 284790ecc6e2SVu Pham int rc; 2848b8d26b3bSNicholas Bellinger 284990ecc6e2SVu Pham pr_debug("Cmd: %p RDMA_READ data_length: %u write_data_done: %u\n", 285090ecc6e2SVu Pham isert_cmd, se_cmd->data_length, cmd->write_data_done); 2851b8d26b3bSNicholas Bellinger wr->iser_ib_op = ISER_IB_RDMA_READ; 2852d40945d8SVu Pham rc = device->reg_rdma_mem(conn, cmd, wr); 285390ecc6e2SVu Pham if (rc) { 285490ecc6e2SVu Pham pr_err("Cmd: %p failed to prepare RDMA res\n", isert_cmd); 285590ecc6e2SVu Pham return rc; 2856b8d26b3bSNicholas Bellinger } 2857b8d26b3bSNicholas Bellinger 2858b6b87a1dSNicholas Bellinger atomic_add(wr->send_wr_num, &isert_conn->post_send_buf_count); 2859b8d26b3bSNicholas Bellinger 2860b8d26b3bSNicholas Bellinger rc = ib_post_send(isert_conn->conn_qp, wr->send_wr, &wr_failed); 2861b8d26b3bSNicholas Bellinger if (rc) { 2862b8d26b3bSNicholas Bellinger pr_warn("ib_post_send() failed for IB_WR_RDMA_READ\n"); 2863b6b87a1dSNicholas Bellinger atomic_sub(wr->send_wr_num, &isert_conn->post_send_buf_count); 2864b8d26b3bSNicholas Bellinger } 286590ecc6e2SVu Pham pr_debug("Cmd: %p posted RDMA_READ memory for ISER Data WRITE\n", 286690ecc6e2SVu Pham isert_cmd); 2867b8d26b3bSNicholas Bellinger 286890ecc6e2SVu Pham return 0; 2869b8d26b3bSNicholas Bellinger } 2870b8d26b3bSNicholas Bellinger 2871b8d26b3bSNicholas Bellinger static int 2872b8d26b3bSNicholas Bellinger isert_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) 2873b8d26b3bSNicholas Bellinger { 2874b8d26b3bSNicholas Bellinger int ret; 2875b8d26b3bSNicholas Bellinger 2876b8d26b3bSNicholas Bellinger switch (state) { 2877b8d26b3bSNicholas Bellinger case ISTATE_SEND_NOPIN_WANT_RESPONSE: 2878b8d26b3bSNicholas Bellinger ret = isert_put_nopin(cmd, conn, false); 2879b8d26b3bSNicholas Bellinger break; 2880b8d26b3bSNicholas Bellinger default: 2881b8d26b3bSNicholas Bellinger pr_err("Unknown immediate state: 0x%02x\n", state); 2882b8d26b3bSNicholas Bellinger ret = -EINVAL; 2883b8d26b3bSNicholas Bellinger break; 2884b8d26b3bSNicholas Bellinger } 2885b8d26b3bSNicholas Bellinger 2886b8d26b3bSNicholas Bellinger return ret; 2887b8d26b3bSNicholas Bellinger } 2888b8d26b3bSNicholas Bellinger 2889b8d26b3bSNicholas Bellinger static int 2890b8d26b3bSNicholas Bellinger isert_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state) 2891b8d26b3bSNicholas Bellinger { 2892b8d26b3bSNicholas Bellinger int ret; 2893b8d26b3bSNicholas Bellinger 2894b8d26b3bSNicholas Bellinger switch (state) { 2895b8d26b3bSNicholas Bellinger case ISTATE_SEND_LOGOUTRSP: 2896b8d26b3bSNicholas Bellinger ret = isert_put_logout_rsp(cmd, conn); 2897b8d26b3bSNicholas Bellinger if (!ret) { 2898b8d26b3bSNicholas Bellinger pr_debug("Returning iSER Logout -EAGAIN\n"); 2899b8d26b3bSNicholas Bellinger ret = -EAGAIN; 2900b8d26b3bSNicholas Bellinger } 2901b8d26b3bSNicholas Bellinger break; 2902b8d26b3bSNicholas Bellinger case ISTATE_SEND_NOPIN: 2903b8d26b3bSNicholas Bellinger ret = isert_put_nopin(cmd, conn, true); 2904b8d26b3bSNicholas Bellinger break; 2905b8d26b3bSNicholas Bellinger case ISTATE_SEND_TASKMGTRSP: 2906b8d26b3bSNicholas Bellinger ret = isert_put_tm_rsp(cmd, conn); 2907b8d26b3bSNicholas Bellinger break; 2908b8d26b3bSNicholas Bellinger case ISTATE_SEND_REJECT: 2909b8d26b3bSNicholas Bellinger ret = isert_put_reject(cmd, conn); 2910b8d26b3bSNicholas Bellinger break; 2911adb54c29SNicholas Bellinger case ISTATE_SEND_TEXTRSP: 2912adb54c29SNicholas Bellinger ret = isert_put_text_rsp(cmd, conn); 2913adb54c29SNicholas Bellinger break; 2914b8d26b3bSNicholas Bellinger case ISTATE_SEND_STATUS: 2915b8d26b3bSNicholas Bellinger /* 2916b8d26b3bSNicholas Bellinger * Special case for sending non GOOD SCSI status from TX thread 2917b8d26b3bSNicholas Bellinger * context during pre se_cmd excecution failure. 2918b8d26b3bSNicholas Bellinger */ 2919b8d26b3bSNicholas Bellinger ret = isert_put_response(conn, cmd); 2920b8d26b3bSNicholas Bellinger break; 2921b8d26b3bSNicholas Bellinger default: 2922b8d26b3bSNicholas Bellinger pr_err("Unknown response state: 0x%02x\n", state); 2923b8d26b3bSNicholas Bellinger ret = -EINVAL; 2924b8d26b3bSNicholas Bellinger break; 2925b8d26b3bSNicholas Bellinger } 2926b8d26b3bSNicholas Bellinger 2927b8d26b3bSNicholas Bellinger return ret; 2928b8d26b3bSNicholas Bellinger } 2929b8d26b3bSNicholas Bellinger 2930b8d26b3bSNicholas Bellinger static int 2931b8d26b3bSNicholas Bellinger isert_setup_np(struct iscsi_np *np, 2932b8d26b3bSNicholas Bellinger struct __kernel_sockaddr_storage *ksockaddr) 2933b8d26b3bSNicholas Bellinger { 2934b8d26b3bSNicholas Bellinger struct isert_np *isert_np; 2935b8d26b3bSNicholas Bellinger struct rdma_cm_id *isert_lid; 2936b8d26b3bSNicholas Bellinger struct sockaddr *sa; 2937b8d26b3bSNicholas Bellinger int ret; 2938b8d26b3bSNicholas Bellinger 2939b8d26b3bSNicholas Bellinger isert_np = kzalloc(sizeof(struct isert_np), GFP_KERNEL); 2940b8d26b3bSNicholas Bellinger if (!isert_np) { 2941b8d26b3bSNicholas Bellinger pr_err("Unable to allocate struct isert_np\n"); 2942b8d26b3bSNicholas Bellinger return -ENOMEM; 2943b8d26b3bSNicholas Bellinger } 2944b8d26b3bSNicholas Bellinger init_waitqueue_head(&isert_np->np_accept_wq); 2945b8d26b3bSNicholas Bellinger mutex_init(&isert_np->np_accept_mutex); 2946b8d26b3bSNicholas Bellinger INIT_LIST_HEAD(&isert_np->np_accept_list); 2947b8d26b3bSNicholas Bellinger init_completion(&isert_np->np_login_comp); 2948b8d26b3bSNicholas Bellinger 2949b8d26b3bSNicholas Bellinger sa = (struct sockaddr *)ksockaddr; 2950b8d26b3bSNicholas Bellinger pr_debug("ksockaddr: %p, sa: %p\n", ksockaddr, sa); 2951b8d26b3bSNicholas Bellinger /* 2952b8d26b3bSNicholas Bellinger * Setup the np->np_sockaddr from the passed sockaddr setup 2953b8d26b3bSNicholas Bellinger * in iscsi_target_configfs.c code.. 2954b8d26b3bSNicholas Bellinger */ 2955b8d26b3bSNicholas Bellinger memcpy(&np->np_sockaddr, ksockaddr, 2956b8d26b3bSNicholas Bellinger sizeof(struct __kernel_sockaddr_storage)); 2957b8d26b3bSNicholas Bellinger 2958b8d26b3bSNicholas Bellinger isert_lid = rdma_create_id(isert_cma_handler, np, RDMA_PS_TCP, 2959b8d26b3bSNicholas Bellinger IB_QPT_RC); 2960b8d26b3bSNicholas Bellinger if (IS_ERR(isert_lid)) { 2961b8d26b3bSNicholas Bellinger pr_err("rdma_create_id() for isert_listen_handler failed: %ld\n", 2962b8d26b3bSNicholas Bellinger PTR_ERR(isert_lid)); 2963b8d26b3bSNicholas Bellinger ret = PTR_ERR(isert_lid); 2964b8d26b3bSNicholas Bellinger goto out; 2965b8d26b3bSNicholas Bellinger } 2966b8d26b3bSNicholas Bellinger 2967b8d26b3bSNicholas Bellinger ret = rdma_bind_addr(isert_lid, sa); 2968b8d26b3bSNicholas Bellinger if (ret) { 2969b8d26b3bSNicholas Bellinger pr_err("rdma_bind_addr() for isert_lid failed: %d\n", ret); 2970b8d26b3bSNicholas Bellinger goto out_lid; 2971b8d26b3bSNicholas Bellinger } 2972b8d26b3bSNicholas Bellinger 2973b8d26b3bSNicholas Bellinger ret = rdma_listen(isert_lid, ISERT_RDMA_LISTEN_BACKLOG); 2974b8d26b3bSNicholas Bellinger if (ret) { 2975b8d26b3bSNicholas Bellinger pr_err("rdma_listen() for isert_lid failed: %d\n", ret); 2976b8d26b3bSNicholas Bellinger goto out_lid; 2977b8d26b3bSNicholas Bellinger } 2978b8d26b3bSNicholas Bellinger 2979b8d26b3bSNicholas Bellinger isert_np->np_cm_id = isert_lid; 2980b8d26b3bSNicholas Bellinger np->np_context = isert_np; 2981b8d26b3bSNicholas Bellinger pr_debug("Setup isert_lid->context: %p\n", isert_lid->context); 2982b8d26b3bSNicholas Bellinger 2983b8d26b3bSNicholas Bellinger return 0; 2984b8d26b3bSNicholas Bellinger 2985b8d26b3bSNicholas Bellinger out_lid: 2986b8d26b3bSNicholas Bellinger rdma_destroy_id(isert_lid); 2987b8d26b3bSNicholas Bellinger out: 2988b8d26b3bSNicholas Bellinger kfree(isert_np); 2989b8d26b3bSNicholas Bellinger return ret; 2990b8d26b3bSNicholas Bellinger } 2991b8d26b3bSNicholas Bellinger 2992b8d26b3bSNicholas Bellinger static int 2993b8d26b3bSNicholas Bellinger isert_check_accept_queue(struct isert_np *isert_np) 2994b8d26b3bSNicholas Bellinger { 2995b8d26b3bSNicholas Bellinger int empty; 2996b8d26b3bSNicholas Bellinger 2997b8d26b3bSNicholas Bellinger mutex_lock(&isert_np->np_accept_mutex); 2998b8d26b3bSNicholas Bellinger empty = list_empty(&isert_np->np_accept_list); 2999b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 3000b8d26b3bSNicholas Bellinger 3001b8d26b3bSNicholas Bellinger return empty; 3002b8d26b3bSNicholas Bellinger } 3003b8d26b3bSNicholas Bellinger 3004b8d26b3bSNicholas Bellinger static int 3005b8d26b3bSNicholas Bellinger isert_rdma_accept(struct isert_conn *isert_conn) 3006b8d26b3bSNicholas Bellinger { 3007b8d26b3bSNicholas Bellinger struct rdma_cm_id *cm_id = isert_conn->conn_cm_id; 3008b8d26b3bSNicholas Bellinger struct rdma_conn_param cp; 3009b8d26b3bSNicholas Bellinger int ret; 3010b8d26b3bSNicholas Bellinger 3011b8d26b3bSNicholas Bellinger memset(&cp, 0, sizeof(struct rdma_conn_param)); 3012b8d26b3bSNicholas Bellinger cp.responder_resources = isert_conn->responder_resources; 3013b8d26b3bSNicholas Bellinger cp.initiator_depth = isert_conn->initiator_depth; 3014b8d26b3bSNicholas Bellinger cp.retry_count = 7; 3015b8d26b3bSNicholas Bellinger cp.rnr_retry_count = 7; 3016b8d26b3bSNicholas Bellinger 3017b8d26b3bSNicholas Bellinger pr_debug("Before rdma_accept >>>>>>>>>>>>>>>>>>>>.\n"); 3018b8d26b3bSNicholas Bellinger 3019b8d26b3bSNicholas Bellinger ret = rdma_accept(cm_id, &cp); 3020b8d26b3bSNicholas Bellinger if (ret) { 3021b8d26b3bSNicholas Bellinger pr_err("rdma_accept() failed with: %d\n", ret); 3022b8d26b3bSNicholas Bellinger return ret; 3023b8d26b3bSNicholas Bellinger } 3024b8d26b3bSNicholas Bellinger 3025b8d26b3bSNicholas Bellinger pr_debug("After rdma_accept >>>>>>>>>>>>>>>>>>>>>.\n"); 3026b8d26b3bSNicholas Bellinger 3027b8d26b3bSNicholas Bellinger return 0; 3028b8d26b3bSNicholas Bellinger } 3029b8d26b3bSNicholas Bellinger 3030b8d26b3bSNicholas Bellinger static int 3031b8d26b3bSNicholas Bellinger isert_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login) 3032b8d26b3bSNicholas Bellinger { 3033b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = (struct isert_conn *)conn->context; 3034b8d26b3bSNicholas Bellinger int ret; 3035b8d26b3bSNicholas Bellinger 3036b8d26b3bSNicholas Bellinger pr_debug("isert_get_login_rx before conn_login_comp conn: %p\n", conn); 30376faaa85fSNicholas Bellinger /* 30386faaa85fSNicholas Bellinger * For login requests after the first PDU, isert_rx_login_req() will 30396faaa85fSNicholas Bellinger * kick schedule_delayed_work(&conn->login_work) as the packet is 30406faaa85fSNicholas Bellinger * received, which turns this callback from iscsi_target_do_login_rx() 30416faaa85fSNicholas Bellinger * into a NOP. 30426faaa85fSNicholas Bellinger */ 30436faaa85fSNicholas Bellinger if (!login->first_request) 30446faaa85fSNicholas Bellinger return 0; 3045b8d26b3bSNicholas Bellinger 3046b8d26b3bSNicholas Bellinger ret = wait_for_completion_interruptible(&isert_conn->conn_login_comp); 3047b8d26b3bSNicholas Bellinger if (ret) 3048b8d26b3bSNicholas Bellinger return ret; 3049b8d26b3bSNicholas Bellinger 3050b8d26b3bSNicholas Bellinger pr_debug("isert_get_login_rx processing login->req: %p\n", login->req); 3051b8d26b3bSNicholas Bellinger return 0; 3052b8d26b3bSNicholas Bellinger } 3053b8d26b3bSNicholas Bellinger 3054b8d26b3bSNicholas Bellinger static void 3055b8d26b3bSNicholas Bellinger isert_set_conn_info(struct iscsi_np *np, struct iscsi_conn *conn, 3056b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn) 3057b8d26b3bSNicholas Bellinger { 3058b8d26b3bSNicholas Bellinger struct rdma_cm_id *cm_id = isert_conn->conn_cm_id; 3059b8d26b3bSNicholas Bellinger struct rdma_route *cm_route = &cm_id->route; 3060b8d26b3bSNicholas Bellinger struct sockaddr_in *sock_in; 3061b8d26b3bSNicholas Bellinger struct sockaddr_in6 *sock_in6; 3062b8d26b3bSNicholas Bellinger 3063b8d26b3bSNicholas Bellinger conn->login_family = np->np_sockaddr.ss_family; 3064b8d26b3bSNicholas Bellinger 3065b8d26b3bSNicholas Bellinger if (np->np_sockaddr.ss_family == AF_INET6) { 3066b8d26b3bSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.dst_addr; 3067b8d26b3bSNicholas Bellinger snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c", 3068b8d26b3bSNicholas Bellinger &sock_in6->sin6_addr.in6_u); 3069b8d26b3bSNicholas Bellinger conn->login_port = ntohs(sock_in6->sin6_port); 3070b8d26b3bSNicholas Bellinger 3071b8d26b3bSNicholas Bellinger sock_in6 = (struct sockaddr_in6 *)&cm_route->addr.src_addr; 3072b8d26b3bSNicholas Bellinger snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c", 3073b8d26b3bSNicholas Bellinger &sock_in6->sin6_addr.in6_u); 3074b8d26b3bSNicholas Bellinger conn->local_port = ntohs(sock_in6->sin6_port); 3075b8d26b3bSNicholas Bellinger } else { 3076b8d26b3bSNicholas Bellinger sock_in = (struct sockaddr_in *)&cm_route->addr.dst_addr; 3077b8d26b3bSNicholas Bellinger sprintf(conn->login_ip, "%pI4", 3078b8d26b3bSNicholas Bellinger &sock_in->sin_addr.s_addr); 3079b8d26b3bSNicholas Bellinger conn->login_port = ntohs(sock_in->sin_port); 3080b8d26b3bSNicholas Bellinger 3081b8d26b3bSNicholas Bellinger sock_in = (struct sockaddr_in *)&cm_route->addr.src_addr; 3082b8d26b3bSNicholas Bellinger sprintf(conn->local_ip, "%pI4", 3083b8d26b3bSNicholas Bellinger &sock_in->sin_addr.s_addr); 3084b8d26b3bSNicholas Bellinger conn->local_port = ntohs(sock_in->sin_port); 3085b8d26b3bSNicholas Bellinger } 3086b8d26b3bSNicholas Bellinger } 3087b8d26b3bSNicholas Bellinger 3088b8d26b3bSNicholas Bellinger static int 3089b8d26b3bSNicholas Bellinger isert_accept_np(struct iscsi_np *np, struct iscsi_conn *conn) 3090b8d26b3bSNicholas Bellinger { 3091b8d26b3bSNicholas Bellinger struct isert_np *isert_np = (struct isert_np *)np->np_context; 3092b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn; 3093b8d26b3bSNicholas Bellinger int max_accept = 0, ret; 3094b8d26b3bSNicholas Bellinger 3095b8d26b3bSNicholas Bellinger accept_wait: 3096b8d26b3bSNicholas Bellinger ret = wait_event_interruptible(isert_np->np_accept_wq, 3097b8d26b3bSNicholas Bellinger !isert_check_accept_queue(isert_np) || 3098b8d26b3bSNicholas Bellinger np->np_thread_state == ISCSI_NP_THREAD_RESET); 3099b8d26b3bSNicholas Bellinger if (max_accept > 5) 3100b8d26b3bSNicholas Bellinger return -ENODEV; 3101b8d26b3bSNicholas Bellinger 3102b8d26b3bSNicholas Bellinger spin_lock_bh(&np->np_thread_lock); 3103b8d26b3bSNicholas Bellinger if (np->np_thread_state == ISCSI_NP_THREAD_RESET) { 3104b8d26b3bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 3105b8d26b3bSNicholas Bellinger pr_err("ISCSI_NP_THREAD_RESET for isert_accept_np\n"); 3106b8d26b3bSNicholas Bellinger return -ENODEV; 3107b8d26b3bSNicholas Bellinger } 3108b8d26b3bSNicholas Bellinger spin_unlock_bh(&np->np_thread_lock); 3109b8d26b3bSNicholas Bellinger 3110b8d26b3bSNicholas Bellinger mutex_lock(&isert_np->np_accept_mutex); 3111b8d26b3bSNicholas Bellinger if (list_empty(&isert_np->np_accept_list)) { 3112b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 3113b8d26b3bSNicholas Bellinger max_accept++; 3114b8d26b3bSNicholas Bellinger goto accept_wait; 3115b8d26b3bSNicholas Bellinger } 3116b8d26b3bSNicholas Bellinger isert_conn = list_first_entry(&isert_np->np_accept_list, 3117b8d26b3bSNicholas Bellinger struct isert_conn, conn_accept_node); 3118b8d26b3bSNicholas Bellinger list_del_init(&isert_conn->conn_accept_node); 3119b8d26b3bSNicholas Bellinger mutex_unlock(&isert_np->np_accept_mutex); 3120b8d26b3bSNicholas Bellinger 3121b8d26b3bSNicholas Bellinger conn->context = isert_conn; 3122b8d26b3bSNicholas Bellinger isert_conn->conn = conn; 3123b8d26b3bSNicholas Bellinger max_accept = 0; 3124b8d26b3bSNicholas Bellinger 3125b8d26b3bSNicholas Bellinger ret = isert_rdma_post_recvl(isert_conn); 3126b8d26b3bSNicholas Bellinger if (ret) 3127b8d26b3bSNicholas Bellinger return ret; 3128b8d26b3bSNicholas Bellinger 3129b8d26b3bSNicholas Bellinger ret = isert_rdma_accept(isert_conn); 3130b8d26b3bSNicholas Bellinger if (ret) 3131b8d26b3bSNicholas Bellinger return ret; 3132b8d26b3bSNicholas Bellinger 3133b8d26b3bSNicholas Bellinger isert_set_conn_info(np, conn, isert_conn); 3134b8d26b3bSNicholas Bellinger 3135b8d26b3bSNicholas Bellinger pr_debug("Processing isert_accept_np: isert_conn: %p\n", isert_conn); 3136b8d26b3bSNicholas Bellinger return 0; 3137b8d26b3bSNicholas Bellinger } 3138b8d26b3bSNicholas Bellinger 3139b8d26b3bSNicholas Bellinger static void 3140b8d26b3bSNicholas Bellinger isert_free_np(struct iscsi_np *np) 3141b8d26b3bSNicholas Bellinger { 3142b8d26b3bSNicholas Bellinger struct isert_np *isert_np = (struct isert_np *)np->np_context; 3143b8d26b3bSNicholas Bellinger 3144b8d26b3bSNicholas Bellinger rdma_destroy_id(isert_np->np_cm_id); 3145b8d26b3bSNicholas Bellinger 3146b8d26b3bSNicholas Bellinger np->np_context = NULL; 3147b8d26b3bSNicholas Bellinger kfree(isert_np); 3148b8d26b3bSNicholas Bellinger } 3149b8d26b3bSNicholas Bellinger 3150defd8848SNicholas Bellinger static void isert_wait_conn(struct iscsi_conn *conn) 3151b8d26b3bSNicholas Bellinger { 3152b8d26b3bSNicholas Bellinger struct isert_conn *isert_conn = conn->context; 3153b8d26b3bSNicholas Bellinger 3154defd8848SNicholas Bellinger pr_debug("isert_wait_conn: Starting \n"); 3155b8d26b3bSNicholas Bellinger /* 3156b8d26b3bSNicholas Bellinger * Decrement post_send_buf_count for special case when called 3157b8d26b3bSNicholas Bellinger * from isert_do_control_comp() -> iscsit_logout_post_handler() 3158b8d26b3bSNicholas Bellinger */ 3159b2cb9649SNicholas Bellinger mutex_lock(&isert_conn->conn_mutex); 3160b8d26b3bSNicholas Bellinger if (isert_conn->logout_posted) 3161b8d26b3bSNicholas Bellinger atomic_dec(&isert_conn->post_send_buf_count); 3162b8d26b3bSNicholas Bellinger 3163b2cb9649SNicholas Bellinger if (isert_conn->conn_cm_id && isert_conn->state != ISER_CONN_DOWN) { 3164defd8848SNicholas Bellinger pr_debug("Calling rdma_disconnect from isert_wait_conn\n"); 3165b8d26b3bSNicholas Bellinger rdma_disconnect(isert_conn->conn_cm_id); 3166b2cb9649SNicholas Bellinger } 3167b8d26b3bSNicholas Bellinger /* 3168b8d26b3bSNicholas Bellinger * Only wait for conn_wait_comp_err if the isert_conn made it 3169b8d26b3bSNicholas Bellinger * into full feature phase.. 3170b8d26b3bSNicholas Bellinger */ 3171b2cb9649SNicholas Bellinger if (isert_conn->state == ISER_CONN_INIT) { 3172b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 3173b2cb9649SNicholas Bellinger return; 3174b2cb9649SNicholas Bellinger } 3175defd8848SNicholas Bellinger if (isert_conn->state == ISER_CONN_UP) 3176defd8848SNicholas Bellinger isert_conn->state = ISER_CONN_TERMINATING; 3177b2cb9649SNicholas Bellinger mutex_unlock(&isert_conn->conn_mutex); 3178b2cb9649SNicholas Bellinger 3179defd8848SNicholas Bellinger wait_for_completion(&isert_conn->conn_wait_comp_err); 3180defd8848SNicholas Bellinger 3181defd8848SNicholas Bellinger wait_for_completion(&isert_conn->conn_wait); 3182defd8848SNicholas Bellinger } 3183defd8848SNicholas Bellinger 3184defd8848SNicholas Bellinger static void isert_free_conn(struct iscsi_conn *conn) 3185defd8848SNicholas Bellinger { 3186defd8848SNicholas Bellinger struct isert_conn *isert_conn = conn->context; 3187b8d26b3bSNicholas Bellinger 3188b8d26b3bSNicholas Bellinger isert_put_conn(isert_conn); 3189b8d26b3bSNicholas Bellinger } 3190b8d26b3bSNicholas Bellinger 3191b8d26b3bSNicholas Bellinger static struct iscsit_transport iser_target_transport = { 3192b8d26b3bSNicholas Bellinger .name = "IB/iSER", 3193b8d26b3bSNicholas Bellinger .transport_type = ISCSI_INFINIBAND, 3194d703ce2fSNicholas Bellinger .priv_size = sizeof(struct isert_cmd), 3195b8d26b3bSNicholas Bellinger .owner = THIS_MODULE, 3196b8d26b3bSNicholas Bellinger .iscsit_setup_np = isert_setup_np, 3197b8d26b3bSNicholas Bellinger .iscsit_accept_np = isert_accept_np, 3198b8d26b3bSNicholas Bellinger .iscsit_free_np = isert_free_np, 3199defd8848SNicholas Bellinger .iscsit_wait_conn = isert_wait_conn, 3200b8d26b3bSNicholas Bellinger .iscsit_free_conn = isert_free_conn, 3201b8d26b3bSNicholas Bellinger .iscsit_get_login_rx = isert_get_login_rx, 3202b8d26b3bSNicholas Bellinger .iscsit_put_login_tx = isert_put_login_tx, 3203b8d26b3bSNicholas Bellinger .iscsit_immediate_queue = isert_immediate_queue, 3204b8d26b3bSNicholas Bellinger .iscsit_response_queue = isert_response_queue, 3205b8d26b3bSNicholas Bellinger .iscsit_get_dataout = isert_get_dataout, 3206b8d26b3bSNicholas Bellinger .iscsit_queue_data_in = isert_put_datain, 3207b8d26b3bSNicholas Bellinger .iscsit_queue_status = isert_put_response, 3208b8d26b3bSNicholas Bellinger }; 3209b8d26b3bSNicholas Bellinger 3210b8d26b3bSNicholas Bellinger static int __init isert_init(void) 3211b8d26b3bSNicholas Bellinger { 3212b8d26b3bSNicholas Bellinger int ret; 3213b8d26b3bSNicholas Bellinger 3214b8d26b3bSNicholas Bellinger isert_rx_wq = alloc_workqueue("isert_rx_wq", 0, 0); 3215b8d26b3bSNicholas Bellinger if (!isert_rx_wq) { 3216b8d26b3bSNicholas Bellinger pr_err("Unable to allocate isert_rx_wq\n"); 3217b8d26b3bSNicholas Bellinger return -ENOMEM; 3218b8d26b3bSNicholas Bellinger } 3219b8d26b3bSNicholas Bellinger 3220b8d26b3bSNicholas Bellinger isert_comp_wq = alloc_workqueue("isert_comp_wq", 0, 0); 3221b8d26b3bSNicholas Bellinger if (!isert_comp_wq) { 3222b8d26b3bSNicholas Bellinger pr_err("Unable to allocate isert_comp_wq\n"); 3223b8d26b3bSNicholas Bellinger ret = -ENOMEM; 3224b8d26b3bSNicholas Bellinger goto destroy_rx_wq; 3225b8d26b3bSNicholas Bellinger } 3226b8d26b3bSNicholas Bellinger 3227b8d26b3bSNicholas Bellinger iscsit_register_transport(&iser_target_transport); 3228b8d26b3bSNicholas Bellinger pr_debug("iSER_TARGET[0] - Loaded iser_target_transport\n"); 3229b8d26b3bSNicholas Bellinger return 0; 3230b8d26b3bSNicholas Bellinger 3231b8d26b3bSNicholas Bellinger destroy_rx_wq: 3232b8d26b3bSNicholas Bellinger destroy_workqueue(isert_rx_wq); 3233b8d26b3bSNicholas Bellinger return ret; 3234b8d26b3bSNicholas Bellinger } 3235b8d26b3bSNicholas Bellinger 3236b8d26b3bSNicholas Bellinger static void __exit isert_exit(void) 3237b8d26b3bSNicholas Bellinger { 3238b8d26b3bSNicholas Bellinger destroy_workqueue(isert_comp_wq); 3239b8d26b3bSNicholas Bellinger destroy_workqueue(isert_rx_wq); 3240b8d26b3bSNicholas Bellinger iscsit_unregister_transport(&iser_target_transport); 3241b8d26b3bSNicholas Bellinger pr_debug("iSER_TARGET[0] - Released iser_target_transport\n"); 3242b8d26b3bSNicholas Bellinger } 3243b8d26b3bSNicholas Bellinger 3244b8d26b3bSNicholas Bellinger MODULE_DESCRIPTION("iSER-Target for mainline target infrastructure"); 3245b8d26b3bSNicholas Bellinger MODULE_VERSION("0.1"); 3246b8d26b3bSNicholas Bellinger MODULE_AUTHOR("nab@Linux-iSCSI.org"); 3247b8d26b3bSNicholas Bellinger MODULE_LICENSE("GPL"); 3248b8d26b3bSNicholas Bellinger 3249b8d26b3bSNicholas Bellinger module_init(isert_init); 3250b8d26b3bSNicholas Bellinger module_exit(isert_exit); 3251