Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved. |
Or Gerlitz | 3ee07d2 | 2014-04-01 16:28:41 +0300 | [diff] [blame] | 3 | * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved. |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 32 | */ |
| 33 | #include <linux/kernel.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/mm.h> |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 36 | #include <linux/scatterlist.h> |
| 37 | #include <linux/kfifo.h> |
| 38 | #include <scsi/scsi_cmnd.h> |
| 39 | #include <scsi/scsi_host.h> |
| 40 | |
| 41 | #include "iscsi_iser.h" |
| 42 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 43 | /* Register user buffer memory and initialize passive rdma |
Sagi Grimberg | d77e653 | 2014-06-11 12:09:58 +0300 | [diff] [blame] | 44 | * dto descriptor. Data size is stored in |
| 45 | * task->data[ISER_DIR_IN].data_len, Protection size |
| 46 | * os stored in task->prot[ISER_DIR_IN].data_len |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 47 | */ |
Sagi Grimberg | d77e653 | 2014-06-11 12:09:58 +0300 | [diff] [blame] | 48 | static int iser_prepare_read_cmd(struct iscsi_task *task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 49 | |
| 50 | { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 51 | struct iscsi_iser_task *iser_task = task->dd_data; |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 52 | struct iser_device *device = iser_task->iser_conn->ib_conn.device; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 53 | struct iser_regd_buf *regd_buf; |
| 54 | int err; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 55 | struct iser_hdr *hdr = &iser_task->desc.iser_header; |
| 56 | struct iser_data_buf *buf_in = &iser_task->data[ISER_DIR_IN]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 57 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 58 | err = iser_dma_map_task_data(iser_task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 59 | buf_in, |
| 60 | ISER_DIR_IN, |
| 61 | DMA_FROM_DEVICE); |
| 62 | if (err) |
| 63 | return err; |
| 64 | |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 65 | if (scsi_prot_sg_count(iser_task->sc)) { |
| 66 | struct iser_data_buf *pbuf_in = &iser_task->prot[ISER_DIR_IN]; |
| 67 | |
| 68 | err = iser_dma_map_task_data(iser_task, |
| 69 | pbuf_in, |
| 70 | ISER_DIR_IN, |
| 71 | DMA_FROM_DEVICE); |
| 72 | if (err) |
| 73 | return err; |
| 74 | } |
| 75 | |
Sagi Grimberg | b4e155f | 2013-07-28 12:35:39 +0300 | [diff] [blame] | 76 | err = device->iser_reg_rdma_mem(iser_task, ISER_DIR_IN); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 77 | if (err) { |
| 78 | iser_err("Failed to set up Data-IN RDMA\n"); |
| 79 | return err; |
| 80 | } |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 81 | regd_buf = &iser_task->rdma_regd[ISER_DIR_IN]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 82 | |
| 83 | hdr->flags |= ISER_RSV; |
| 84 | hdr->read_stag = cpu_to_be32(regd_buf->reg.rkey); |
| 85 | hdr->read_va = cpu_to_be64(regd_buf->reg.va); |
| 86 | |
| 87 | iser_dbg("Cmd itt:%d READ tags RKEY:%#.4X VA:%#llX\n", |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 88 | task->itt, regd_buf->reg.rkey, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 89 | (unsigned long long)regd_buf->reg.va); |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | /* Register user buffer memory and initialize passive rdma |
Sagi Grimberg | d77e653 | 2014-06-11 12:09:58 +0300 | [diff] [blame] | 95 | * dto descriptor. Data size is stored in |
| 96 | * task->data[ISER_DIR_OUT].data_len, Protection size |
| 97 | * is stored at task->prot[ISER_DIR_OUT].data_len |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 98 | */ |
| 99 | static int |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 100 | iser_prepare_write_cmd(struct iscsi_task *task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 101 | unsigned int imm_sz, |
| 102 | unsigned int unsol_sz, |
| 103 | unsigned int edtl) |
| 104 | { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 105 | struct iscsi_iser_task *iser_task = task->dd_data; |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 106 | struct iser_device *device = iser_task->iser_conn->ib_conn.device; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 107 | struct iser_regd_buf *regd_buf; |
| 108 | int err; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 109 | struct iser_hdr *hdr = &iser_task->desc.iser_header; |
| 110 | struct iser_data_buf *buf_out = &iser_task->data[ISER_DIR_OUT]; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 111 | struct ib_sge *tx_dsg = &iser_task->desc.tx_sg[1]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 112 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 113 | err = iser_dma_map_task_data(iser_task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 114 | buf_out, |
| 115 | ISER_DIR_OUT, |
| 116 | DMA_TO_DEVICE); |
| 117 | if (err) |
| 118 | return err; |
| 119 | |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 120 | if (scsi_prot_sg_count(iser_task->sc)) { |
| 121 | struct iser_data_buf *pbuf_out = &iser_task->prot[ISER_DIR_OUT]; |
| 122 | |
| 123 | err = iser_dma_map_task_data(iser_task, |
| 124 | pbuf_out, |
| 125 | ISER_DIR_OUT, |
| 126 | DMA_TO_DEVICE); |
| 127 | if (err) |
| 128 | return err; |
| 129 | } |
| 130 | |
Sagi Grimberg | b4e155f | 2013-07-28 12:35:39 +0300 | [diff] [blame] | 131 | err = device->iser_reg_rdma_mem(iser_task, ISER_DIR_OUT); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 132 | if (err != 0) { |
| 133 | iser_err("Failed to register write cmd RDMA mem\n"); |
| 134 | return err; |
| 135 | } |
| 136 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 137 | regd_buf = &iser_task->rdma_regd[ISER_DIR_OUT]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 138 | |
| 139 | if (unsol_sz < edtl) { |
| 140 | hdr->flags |= ISER_WSV; |
| 141 | hdr->write_stag = cpu_to_be32(regd_buf->reg.rkey); |
| 142 | hdr->write_va = cpu_to_be64(regd_buf->reg.va + unsol_sz); |
| 143 | |
| 144 | iser_dbg("Cmd itt:%d, WRITE tags, RKEY:%#.4X " |
| 145 | "VA:%#llX + unsol:%d\n", |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 146 | task->itt, regd_buf->reg.rkey, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 147 | (unsigned long long)regd_buf->reg.va, unsol_sz); |
| 148 | } |
| 149 | |
| 150 | if (imm_sz > 0) { |
| 151 | iser_dbg("Cmd itt:%d, WRITE, adding imm.data sz: %d\n", |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 152 | task->itt, imm_sz); |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 153 | tx_dsg->addr = regd_buf->reg.va; |
| 154 | tx_dsg->length = imm_sz; |
| 155 | tx_dsg->lkey = regd_buf->reg.lkey; |
| 156 | iser_task->desc.num_sge = 2; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 157 | } |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 162 | /* creates a new tx descriptor and adds header regd buffer */ |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 163 | static void iser_create_send_desc(struct iser_conn *iser_conn, |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 164 | struct iser_tx_desc *tx_desc) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 165 | { |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 166 | struct iser_device *device = iser_conn->ib_conn.device; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 167 | |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 168 | ib_dma_sync_single_for_cpu(device->ib_device, |
| 169 | tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 170 | |
| 171 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); |
| 172 | tx_desc->iser_header.flags = ISER_VER; |
| 173 | |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 174 | tx_desc->num_sge = 1; |
| 175 | |
| 176 | if (tx_desc->tx_sg[0].lkey != device->mr->lkey) { |
| 177 | tx_desc->tx_sg[0].lkey = device->mr->lkey; |
| 178 | iser_dbg("sdesc %p lkey mismatch, fixing\n", tx_desc); |
| 179 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 180 | } |
| 181 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 182 | static void iser_free_login_buf(struct iser_conn *iser_conn) |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 183 | { |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 184 | struct iser_device *device = iser_conn->ib_conn.device; |
| 185 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 186 | if (!iser_conn->login_buf) |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 187 | return; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 188 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 189 | if (iser_conn->login_req_dma) |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 190 | ib_dma_unmap_single(device->ib_device, |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 191 | iser_conn->login_req_dma, |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 192 | ISCSI_DEF_MAX_RECV_SEG_LEN, DMA_TO_DEVICE); |
| 193 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 194 | if (iser_conn->login_resp_dma) |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 195 | ib_dma_unmap_single(device->ib_device, |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 196 | iser_conn->login_resp_dma, |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 197 | ISER_RX_LOGIN_SIZE, DMA_FROM_DEVICE); |
| 198 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 199 | kfree(iser_conn->login_buf); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 200 | |
| 201 | /* make sure we never redo any unmapping */ |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 202 | iser_conn->login_req_dma = 0; |
| 203 | iser_conn->login_resp_dma = 0; |
| 204 | iser_conn->login_buf = NULL; |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 205 | } |
| 206 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 207 | static int iser_alloc_login_buf(struct iser_conn *iser_conn) |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 208 | { |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 209 | struct iser_device *device = iser_conn->ib_conn.device; |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 210 | int req_err, resp_err; |
| 211 | |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 212 | BUG_ON(device == NULL); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 213 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 214 | iser_conn->login_buf = kmalloc(ISCSI_DEF_MAX_RECV_SEG_LEN + |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 215 | ISER_RX_LOGIN_SIZE, GFP_KERNEL); |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 216 | if (!iser_conn->login_buf) |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 217 | goto out_err; |
| 218 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 219 | iser_conn->login_req_buf = iser_conn->login_buf; |
| 220 | iser_conn->login_resp_buf = iser_conn->login_buf + |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 221 | ISCSI_DEF_MAX_RECV_SEG_LEN; |
| 222 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 223 | iser_conn->login_req_dma = ib_dma_map_single(device->ib_device, |
| 224 | iser_conn->login_req_buf, |
| 225 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
| 226 | DMA_TO_DEVICE); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 227 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 228 | iser_conn->login_resp_dma = ib_dma_map_single(device->ib_device, |
| 229 | iser_conn->login_resp_buf, |
| 230 | ISER_RX_LOGIN_SIZE, |
| 231 | DMA_FROM_DEVICE); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 232 | |
| 233 | req_err = ib_dma_mapping_error(device->ib_device, |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 234 | iser_conn->login_req_dma); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 235 | resp_err = ib_dma_mapping_error(device->ib_device, |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 236 | iser_conn->login_resp_dma); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 237 | |
| 238 | if (req_err || resp_err) { |
| 239 | if (req_err) |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 240 | iser_conn->login_req_dma = 0; |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 241 | if (resp_err) |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 242 | iser_conn->login_resp_dma = 0; |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 243 | goto free_login_buf; |
| 244 | } |
| 245 | return 0; |
| 246 | |
| 247 | free_login_buf: |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 248 | iser_free_login_buf(iser_conn); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 249 | |
| 250 | out_err: |
| 251 | iser_err("unable to alloc or map login buf\n"); |
| 252 | return -ENOMEM; |
| 253 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 254 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 255 | int iser_alloc_rx_descriptors(struct iser_conn *iser_conn, |
| 256 | struct iscsi_session *session) |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 257 | { |
| 258 | int i, j; |
| 259 | u64 dma_addr; |
| 260 | struct iser_rx_desc *rx_desc; |
| 261 | struct ib_sge *rx_sg; |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 262 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
| 263 | struct iser_device *device = ib_conn->device; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 264 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 265 | iser_conn->qp_max_recv_dtos = session->cmds_max; |
| 266 | iser_conn->qp_max_recv_dtos_mask = session->cmds_max - 1; /* cmds_max is 2^N */ |
| 267 | iser_conn->min_posted_rx = iser_conn->qp_max_recv_dtos >> 2; |
Shlomo Pongratz | b7f0451 | 2013-07-28 12:35:38 +0300 | [diff] [blame] | 268 | |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 269 | if (device->iser_alloc_rdma_reg_res(ib_conn, session->scsi_cmds_max)) |
Sagi Grimberg | b4e155f | 2013-07-28 12:35:39 +0300 | [diff] [blame] | 270 | goto create_rdma_reg_res_failed; |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 271 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 272 | if (iser_alloc_login_buf(iser_conn)) |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 273 | goto alloc_login_buf_fail; |
| 274 | |
Sagi Grimberg | 6aabfa7 | 2014-10-01 14:02:09 +0300 | [diff] [blame] | 275 | iser_conn->num_rx_descs = session->cmds_max; |
| 276 | iser_conn->rx_descs = kmalloc(iser_conn->num_rx_descs * |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 277 | sizeof(struct iser_rx_desc), GFP_KERNEL); |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 278 | if (!iser_conn->rx_descs) |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 279 | goto rx_desc_alloc_fail; |
| 280 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 281 | rx_desc = iser_conn->rx_descs; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 282 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 283 | for (i = 0; i < iser_conn->qp_max_recv_dtos; i++, rx_desc++) { |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 284 | dma_addr = ib_dma_map_single(device->ib_device, (void *)rx_desc, |
| 285 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); |
| 286 | if (ib_dma_mapping_error(device->ib_device, dma_addr)) |
| 287 | goto rx_desc_dma_map_failed; |
| 288 | |
| 289 | rx_desc->dma_addr = dma_addr; |
| 290 | |
| 291 | rx_sg = &rx_desc->rx_sg; |
| 292 | rx_sg->addr = rx_desc->dma_addr; |
| 293 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; |
| 294 | rx_sg->lkey = device->mr->lkey; |
| 295 | } |
| 296 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 297 | iser_conn->rx_desc_head = 0; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 298 | return 0; |
| 299 | |
| 300 | rx_desc_dma_map_failed: |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 301 | rx_desc = iser_conn->rx_descs; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 302 | for (j = 0; j < i; j++, rx_desc++) |
| 303 | ib_dma_unmap_single(device->ib_device, rx_desc->dma_addr, |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 304 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 305 | kfree(iser_conn->rx_descs); |
| 306 | iser_conn->rx_descs = NULL; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 307 | rx_desc_alloc_fail: |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 308 | iser_free_login_buf(iser_conn); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 309 | alloc_login_buf_fail: |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 310 | device->iser_free_rdma_reg_res(ib_conn); |
Sagi Grimberg | b4e155f | 2013-07-28 12:35:39 +0300 | [diff] [blame] | 311 | create_rdma_reg_res_failed: |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 312 | iser_err("failed allocating rx descriptors / data buffers\n"); |
| 313 | return -ENOMEM; |
| 314 | } |
| 315 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 316 | void iser_free_rx_descriptors(struct iser_conn *iser_conn) |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 317 | { |
| 318 | int i; |
| 319 | struct iser_rx_desc *rx_desc; |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 320 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
| 321 | struct iser_device *device = ib_conn->device; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 322 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 323 | if (!iser_conn->rx_descs) |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 324 | goto free_login_buf; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 325 | |
Sagi Grimberg | 2e02d653 | 2013-08-15 17:04:42 +0300 | [diff] [blame] | 326 | if (device->iser_free_rdma_reg_res) |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 327 | device->iser_free_rdma_reg_res(ib_conn); |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 328 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 329 | rx_desc = iser_conn->rx_descs; |
| 330 | for (i = 0; i < iser_conn->qp_max_recv_dtos; i++, rx_desc++) |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 331 | ib_dma_unmap_single(device->ib_device, rx_desc->dma_addr, |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 332 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 333 | kfree(iser_conn->rx_descs); |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 334 | /* make sure we never redo any unmapping */ |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 335 | iser_conn->rx_descs = NULL; |
Shlomo Pongratz | 986db0d | 2013-07-28 12:35:37 +0300 | [diff] [blame] | 336 | |
| 337 | free_login_buf: |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 338 | iser_free_login_buf(iser_conn); |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 339 | } |
| 340 | |
Or Gerlitz | 89e984e | 2012-03-05 18:21:44 +0200 | [diff] [blame] | 341 | static int iser_post_rx_bufs(struct iscsi_conn *conn, struct iscsi_hdr *req) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 342 | { |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 343 | struct iser_conn *iser_conn = conn->dd_data; |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 344 | struct ib_conn *ib_conn = &iser_conn->ib_conn; |
Or Gerlitz | 6a06a4b | 2013-08-08 13:44:29 +0300 | [diff] [blame] | 345 | struct iscsi_session *session = conn->session; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 346 | |
Or Gerlitz | 89e984e | 2012-03-05 18:21:44 +0200 | [diff] [blame] | 347 | iser_dbg("req op %x flags %x\n", req->opcode, req->flags); |
| 348 | /* check if this is the last login - going to full feature phase */ |
| 349 | if ((req->flags & ISCSI_FULL_FEATURE_PHASE) != ISCSI_FULL_FEATURE_PHASE) |
| 350 | return 0; |
| 351 | |
| 352 | /* |
Sagi Grimberg | ff3dd52 | 2014-10-01 14:02:10 +0300 | [diff] [blame] | 353 | * Check that there is one posted recv buffer |
| 354 | * (for the last login response). |
Or Gerlitz | 89e984e | 2012-03-05 18:21:44 +0200 | [diff] [blame] | 355 | */ |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 356 | WARN_ON(ib_conn->post_recv_buf_count != 1); |
Or Gerlitz | 89e984e | 2012-03-05 18:21:44 +0200 | [diff] [blame] | 357 | |
Or Gerlitz | 6a06a4b | 2013-08-08 13:44:29 +0300 | [diff] [blame] | 358 | if (session->discovery_sess) { |
| 359 | iser_info("Discovery session, re-using login RX buffer\n"); |
| 360 | return 0; |
| 361 | } else |
| 362 | iser_info("Normal session, posting batch of RX %d buffers\n", |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 363 | iser_conn->min_posted_rx); |
Or Gerlitz | 6a06a4b | 2013-08-08 13:44:29 +0300 | [diff] [blame] | 364 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 365 | /* Initial post receive buffers */ |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 366 | if (iser_post_recvm(iser_conn, iser_conn->min_posted_rx)) |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 367 | return -ENOMEM; |
| 368 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 369 | return 0; |
| 370 | } |
| 371 | |
Max Gurtovoy | 6ec9d4d | 2014-12-07 16:09:56 +0200 | [diff] [blame^] | 372 | static inline bool iser_signal_comp(u8 sig_count) |
Sagi Grimberg | 6df5a12 | 2014-10-01 14:02:12 +0300 | [diff] [blame] | 373 | { |
| 374 | return ((sig_count % ISER_SIGNAL_CMD_COUNT) == 0); |
| 375 | } |
| 376 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 377 | /** |
| 378 | * iser_send_command - send command PDU |
| 379 | */ |
Mike Christie | 2747fdb | 2008-05-21 15:54:08 -0500 | [diff] [blame] | 380 | int iser_send_command(struct iscsi_conn *conn, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 381 | struct iscsi_task *task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 382 | { |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 383 | struct iser_conn *iser_conn = conn->dd_data; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 384 | struct iscsi_iser_task *iser_task = task->dd_data; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 385 | unsigned long edtl; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 386 | int err; |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 387 | struct iser_data_buf *data_buf, *prot_buf; |
Nicholas Bellinger | 1235218 | 2011-05-27 11:16:33 +0000 | [diff] [blame] | 388 | struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)task->hdr; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 389 | struct scsi_cmnd *sc = task->sc; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 390 | struct iser_tx_desc *tx_desc = &iser_task->desc; |
Max Gurtovoy | 6ec9d4d | 2014-12-07 16:09:56 +0200 | [diff] [blame^] | 391 | u8 sig_count = ++iser_conn->ib_conn.sig_count; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 392 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 393 | edtl = ntohl(hdr->data_length); |
| 394 | |
| 395 | /* build the tx desc regd header and add it to the tx desc dto */ |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 396 | tx_desc->type = ISCSI_TX_SCSI_COMMAND; |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 397 | iser_create_send_desc(iser_conn, tx_desc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 398 | |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 399 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 400 | data_buf = &iser_task->data[ISER_DIR_IN]; |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 401 | prot_buf = &iser_task->prot[ISER_DIR_IN]; |
| 402 | } else { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 403 | data_buf = &iser_task->data[ISER_DIR_OUT]; |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 404 | prot_buf = &iser_task->prot[ISER_DIR_OUT]; |
| 405 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 406 | |
FUJITA Tomonori | da9c0c7 | 2007-06-01 18:56:21 +0900 | [diff] [blame] | 407 | if (scsi_sg_count(sc)) { /* using a scatter list */ |
| 408 | data_buf->buf = scsi_sglist(sc); |
| 409 | data_buf->size = scsi_sg_count(sc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 410 | } |
FUJITA Tomonori | da9c0c7 | 2007-06-01 18:56:21 +0900 | [diff] [blame] | 411 | data_buf->data_len = scsi_bufflen(sc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 412 | |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 413 | if (scsi_prot_sg_count(sc)) { |
| 414 | prot_buf->buf = scsi_prot_sglist(sc); |
| 415 | prot_buf->size = scsi_prot_sg_count(sc); |
Sagi Grimberg | d77e653 | 2014-06-11 12:09:58 +0300 | [diff] [blame] | 416 | prot_buf->data_len = data_buf->data_len >> |
| 417 | ilog2(sc->device->sector_size) * 8; |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 418 | } |
| 419 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 420 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { |
Sagi Grimberg | d77e653 | 2014-06-11 12:09:58 +0300 | [diff] [blame] | 421 | err = iser_prepare_read_cmd(task); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 422 | if (err) |
| 423 | goto send_command_error; |
| 424 | } |
| 425 | if (hdr->flags & ISCSI_FLAG_CMD_WRITE) { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 426 | err = iser_prepare_write_cmd(task, |
| 427 | task->imm_count, |
| 428 | task->imm_count + |
Mike Christie | 0f9c744 | 2008-12-02 00:32:06 -0600 | [diff] [blame] | 429 | task->unsol_r2t.data_length, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 430 | edtl); |
| 431 | if (err) |
| 432 | goto send_command_error; |
| 433 | } |
| 434 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 435 | iser_task->status = ISER_TASK_STATUS_STARTED; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 436 | |
Sagi Grimberg | 6df5a12 | 2014-10-01 14:02:12 +0300 | [diff] [blame] | 437 | err = iser_post_send(&iser_conn->ib_conn, tx_desc, |
Max Gurtovoy | 6ec9d4d | 2014-12-07 16:09:56 +0200 | [diff] [blame^] | 438 | iser_signal_comp(sig_count)); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 439 | if (!err) |
| 440 | return 0; |
| 441 | |
| 442 | send_command_error: |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 443 | iser_err("conn %p failed task->itt %d err %d\n",conn, task->itt, err); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 444 | return err; |
| 445 | } |
| 446 | |
| 447 | /** |
| 448 | * iser_send_data_out - send data out PDU |
| 449 | */ |
Mike Christie | 2747fdb | 2008-05-21 15:54:08 -0500 | [diff] [blame] | 450 | int iser_send_data_out(struct iscsi_conn *conn, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 451 | struct iscsi_task *task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 452 | struct iscsi_data *hdr) |
| 453 | { |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 454 | struct iser_conn *iser_conn = conn->dd_data; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 455 | struct iscsi_iser_task *iser_task = task->dd_data; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 456 | struct iser_tx_desc *tx_desc = NULL; |
| 457 | struct iser_regd_buf *regd_buf; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 458 | unsigned long buf_offset; |
| 459 | unsigned long data_seg_len; |
Erez Zilber | 0a22ab9 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 460 | uint32_t itt; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 461 | int err = 0; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 462 | struct ib_sge *tx_dsg; |
| 463 | |
Erez Zilber | 0a22ab9 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 464 | itt = (__force uint32_t)hdr->itt; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 465 | data_seg_len = ntoh24(hdr->dlength); |
| 466 | buf_offset = ntohl(hdr->offset); |
| 467 | |
| 468 | iser_dbg("%s itt %d dseg_len %d offset %d\n", |
| 469 | __func__,(int)itt,(int)data_seg_len,(int)buf_offset); |
| 470 | |
Or Gerlitz | 528f4e8 | 2010-02-08 13:20:43 +0000 | [diff] [blame] | 471 | tx_desc = kmem_cache_zalloc(ig.desc_cache, GFP_ATOMIC); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 472 | if (tx_desc == NULL) { |
| 473 | iser_err("Failed to alloc desc for post dataout\n"); |
| 474 | return -ENOMEM; |
| 475 | } |
| 476 | |
| 477 | tx_desc->type = ISCSI_TX_DATAOUT; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 478 | tx_desc->iser_header.flags = ISER_VER; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 479 | memcpy(&tx_desc->iscsi_header, hdr, sizeof(struct iscsi_hdr)); |
| 480 | |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 481 | /* build the tx desc */ |
| 482 | iser_initialize_task_headers(task, tx_desc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 483 | |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 484 | regd_buf = &iser_task->rdma_regd[ISER_DIR_OUT]; |
| 485 | tx_dsg = &tx_desc->tx_sg[1]; |
| 486 | tx_dsg->addr = regd_buf->reg.va + buf_offset; |
| 487 | tx_dsg->length = data_seg_len; |
| 488 | tx_dsg->lkey = regd_buf->reg.lkey; |
| 489 | tx_desc->num_sge = 2; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 490 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 491 | if (buf_offset + data_seg_len > iser_task->data[ISER_DIR_OUT].data_len) { |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 492 | iser_err("Offset:%ld & DSL:%ld in Data-Out " |
| 493 | "inconsistent with total len:%ld, itt:%d\n", |
| 494 | buf_offset, data_seg_len, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 495 | iser_task->data[ISER_DIR_OUT].data_len, itt); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 496 | err = -EINVAL; |
| 497 | goto send_data_out_error; |
| 498 | } |
| 499 | iser_dbg("data-out itt: %d, offset: %ld, sz: %ld\n", |
| 500 | itt, buf_offset, data_seg_len); |
| 501 | |
| 502 | |
Sagi Grimberg | 6df5a12 | 2014-10-01 14:02:12 +0300 | [diff] [blame] | 503 | err = iser_post_send(&iser_conn->ib_conn, tx_desc, true); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 504 | if (!err) |
| 505 | return 0; |
| 506 | |
| 507 | send_data_out_error: |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 508 | kmem_cache_free(ig.desc_cache, tx_desc); |
| 509 | iser_err("conn %p failed err %d\n",conn, err); |
| 510 | return err; |
| 511 | } |
| 512 | |
| 513 | int iser_send_control(struct iscsi_conn *conn, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 514 | struct iscsi_task *task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 515 | { |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 516 | struct iser_conn *iser_conn = conn->dd_data; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 517 | struct iscsi_iser_task *iser_task = task->dd_data; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 518 | struct iser_tx_desc *mdesc = &iser_task->desc; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 519 | unsigned long data_seg_len; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 520 | int err = 0; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 521 | struct iser_device *device; |
| 522 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 523 | /* build the tx desc regd header and add it to the tx desc dto */ |
| 524 | mdesc->type = ISCSI_TX_CONTROL; |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 525 | iser_create_send_desc(iser_conn, mdesc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 526 | |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 527 | device = iser_conn->ib_conn.device; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 528 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 529 | data_seg_len = ntoh24(task->hdr->dlength); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 530 | |
| 531 | if (data_seg_len > 0) { |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 532 | struct ib_sge *tx_dsg = &mdesc->tx_sg[1]; |
| 533 | if (task != conn->login_task) { |
| 534 | iser_err("data present on non login task!!!\n"); |
| 535 | goto send_control_error; |
| 536 | } |
Or Gerlitz | 2c4ce60 | 2011-11-04 00:19:46 +0200 | [diff] [blame] | 537 | |
| 538 | ib_dma_sync_single_for_cpu(device->ib_device, |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 539 | iser_conn->login_req_dma, task->data_count, |
Or Gerlitz | 2c4ce60 | 2011-11-04 00:19:46 +0200 | [diff] [blame] | 540 | DMA_TO_DEVICE); |
| 541 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 542 | memcpy(iser_conn->login_req_buf, task->data, task->data_count); |
Or Gerlitz | 2c4ce60 | 2011-11-04 00:19:46 +0200 | [diff] [blame] | 543 | |
| 544 | ib_dma_sync_single_for_device(device->ib_device, |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 545 | iser_conn->login_req_dma, task->data_count, |
Or Gerlitz | 2c4ce60 | 2011-11-04 00:19:46 +0200 | [diff] [blame] | 546 | DMA_TO_DEVICE); |
| 547 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 548 | tx_dsg->addr = iser_conn->login_req_dma; |
Or Gerlitz | 200ae1a | 2011-08-01 21:14:09 +0000 | [diff] [blame] | 549 | tx_dsg->length = task->data_count; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 550 | tx_dsg->lkey = device->mr->lkey; |
| 551 | mdesc->num_sge = 2; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 552 | } |
| 553 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 554 | if (task == conn->login_task) { |
Or Gerlitz | 6a06a4b | 2013-08-08 13:44:29 +0300 | [diff] [blame] | 555 | iser_dbg("op %x dsl %lx, posting login rx buffer\n", |
| 556 | task->hdr->opcode, data_seg_len); |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 557 | err = iser_post_recvl(iser_conn); |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 558 | if (err) |
| 559 | goto send_control_error; |
Or Gerlitz | 89e984e | 2012-03-05 18:21:44 +0200 | [diff] [blame] | 560 | err = iser_post_rx_bufs(conn, task->hdr); |
| 561 | if (err) |
| 562 | goto send_control_error; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 563 | } |
| 564 | |
Sagi Grimberg | 6df5a12 | 2014-10-01 14:02:12 +0300 | [diff] [blame] | 565 | err = iser_post_send(&iser_conn->ib_conn, mdesc, true); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 566 | if (!err) |
| 567 | return 0; |
| 568 | |
| 569 | send_control_error: |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 570 | iser_err("conn %p failed err %d\n",conn, err); |
| 571 | return err; |
| 572 | } |
| 573 | |
| 574 | /** |
| 575 | * iser_rcv_dto_completion - recv DTO completion |
| 576 | */ |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 577 | void iser_rcv_completion(struct iser_rx_desc *rx_desc, |
| 578 | unsigned long rx_xfer_len, |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 579 | struct ib_conn *ib_conn) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 580 | { |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 581 | struct iser_conn *iser_conn = container_of(ib_conn, struct iser_conn, |
| 582 | ib_conn); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 583 | struct iscsi_hdr *hdr; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 584 | u64 rx_dma; |
| 585 | int rx_buflen, outstanding, count, err; |
| 586 | |
| 587 | /* differentiate between login to all other PDUs */ |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 588 | if ((char *)rx_desc == iser_conn->login_resp_buf) { |
| 589 | rx_dma = iser_conn->login_resp_dma; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 590 | rx_buflen = ISER_RX_LOGIN_SIZE; |
| 591 | } else { |
| 592 | rx_dma = rx_desc->dma_addr; |
| 593 | rx_buflen = ISER_RX_PAYLOAD_SIZE; |
| 594 | } |
| 595 | |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 596 | ib_dma_sync_single_for_cpu(ib_conn->device->ib_device, rx_dma, |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 597 | rx_buflen, DMA_FROM_DEVICE); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 598 | |
| 599 | hdr = &rx_desc->iscsi_header; |
| 600 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 601 | iser_dbg("op 0x%x itt 0x%x dlen %d\n", hdr->opcode, |
| 602 | hdr->itt, (int)(rx_xfer_len - ISER_HEADERS_LEN)); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 603 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 604 | iscsi_iser_recv(iser_conn->iscsi_conn, hdr, rx_desc->data, |
Ariel Nahum | 4667f5d | 2014-04-01 16:28:39 +0300 | [diff] [blame] | 605 | rx_xfer_len - ISER_HEADERS_LEN); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 606 | |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 607 | ib_dma_sync_single_for_device(ib_conn->device->ib_device, rx_dma, |
Ariel Nahum | 4667f5d | 2014-04-01 16:28:39 +0300 | [diff] [blame] | 608 | rx_buflen, DMA_FROM_DEVICE); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 609 | |
| 610 | /* decrementing conn->post_recv_buf_count only --after-- freeing the * |
| 611 | * task eliminates the need to worry on tasks which are completed in * |
| 612 | * parallel to the execution of iser_conn_term. So the code that waits * |
| 613 | * for the posted rx bufs refcount to become zero handles everything */ |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 614 | ib_conn->post_recv_buf_count--; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 615 | |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 616 | if (rx_dma == iser_conn->login_resp_dma) |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 617 | return; |
| 618 | |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 619 | outstanding = ib_conn->post_recv_buf_count; |
Sagi Grimberg | 5716af6 | 2014-10-01 14:01:57 +0300 | [diff] [blame] | 620 | if (outstanding + iser_conn->min_posted_rx <= iser_conn->qp_max_recv_dtos) { |
| 621 | count = min(iser_conn->qp_max_recv_dtos - outstanding, |
| 622 | iser_conn->min_posted_rx); |
| 623 | err = iser_post_recvm(iser_conn, count); |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 624 | if (err) |
| 625 | iser_err("posting %d rx bufs err %d\n", count, err); |
| 626 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 627 | } |
| 628 | |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 629 | void iser_snd_completion(struct iser_tx_desc *tx_desc, |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 630 | struct ib_conn *ib_conn) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 631 | { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 632 | struct iscsi_task *task; |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 633 | struct iser_device *device = ib_conn->device; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 634 | |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 635 | if (tx_desc->type == ISCSI_TX_DATAOUT) { |
| 636 | ib_dma_unmap_single(device->ib_device, tx_desc->dma_addr, |
| 637 | ISER_HEADERS_LEN, DMA_TO_DEVICE); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 638 | kmem_cache_free(ig.desc_cache, tx_desc); |
Dan Carpenter | fd8b48b | 2014-01-29 16:18:51 +0300 | [diff] [blame] | 639 | tx_desc = NULL; |
Or Gerlitz | f19624a | 2010-02-08 13:19:56 +0000 | [diff] [blame] | 640 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 641 | |
Dan Carpenter | fd8b48b | 2014-01-29 16:18:51 +0300 | [diff] [blame] | 642 | if (tx_desc && tx_desc->type == ISCSI_TX_CONTROL) { |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 643 | /* this arithmetic is legal by libiscsi dd_data allocation */ |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 644 | task = (void *) ((long)(void *)tx_desc - |
| 645 | sizeof(struct iscsi_task)); |
| 646 | if (task->hdr->itt == RESERVED_ITT) |
| 647 | iscsi_put_task(task); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 648 | } |
| 649 | } |
| 650 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 651 | void iser_task_rdma_init(struct iscsi_iser_task *iser_task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 652 | |
| 653 | { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 654 | iser_task->status = ISER_TASK_STATUS_INIT; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 655 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 656 | iser_task->dir[ISER_DIR_IN] = 0; |
| 657 | iser_task->dir[ISER_DIR_OUT] = 0; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 658 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 659 | iser_task->data[ISER_DIR_IN].data_len = 0; |
| 660 | iser_task->data[ISER_DIR_OUT].data_len = 0; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 661 | |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 662 | iser_task->prot[ISER_DIR_IN].data_len = 0; |
| 663 | iser_task->prot[ISER_DIR_OUT].data_len = 0; |
| 664 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 665 | memset(&iser_task->rdma_regd[ISER_DIR_IN], 0, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 666 | sizeof(struct iser_regd_buf)); |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 667 | memset(&iser_task->rdma_regd[ISER_DIR_OUT], 0, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 668 | sizeof(struct iser_regd_buf)); |
| 669 | } |
| 670 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 671 | void iser_task_rdma_finalize(struct iscsi_iser_task *iser_task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 672 | { |
Sagi Grimberg | a4ee353 | 2014-10-01 14:01:58 +0300 | [diff] [blame] | 673 | struct iser_device *device = iser_task->iser_conn->ib_conn.device; |
Sagi Grimberg | 9a8b08f | 2014-03-05 19:43:44 +0200 | [diff] [blame] | 674 | int is_rdma_data_aligned = 1; |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 675 | int is_rdma_prot_aligned = 1; |
| 676 | int prot_count = scsi_prot_sg_count(iser_task->sc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 677 | |
| 678 | /* if we were reading, copy back to unaligned sglist, |
| 679 | * anyway dma_unmap and free the copy |
| 680 | */ |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 681 | if (iser_task->data_copy[ISER_DIR_IN].copy_buf != NULL) { |
Sagi Grimberg | 9a8b08f | 2014-03-05 19:43:44 +0200 | [diff] [blame] | 682 | is_rdma_data_aligned = 0; |
| 683 | iser_finalize_rdma_unaligned_sg(iser_task, |
| 684 | &iser_task->data[ISER_DIR_IN], |
| 685 | &iser_task->data_copy[ISER_DIR_IN], |
| 686 | ISER_DIR_IN); |
Erez Zilber | 74a2078 | 2006-09-27 16:43:06 +0300 | [diff] [blame] | 687 | } |
Sagi Grimberg | 9a8b08f | 2014-03-05 19:43:44 +0200 | [diff] [blame] | 688 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 689 | if (iser_task->data_copy[ISER_DIR_OUT].copy_buf != NULL) { |
Sagi Grimberg | 9a8b08f | 2014-03-05 19:43:44 +0200 | [diff] [blame] | 690 | is_rdma_data_aligned = 0; |
| 691 | iser_finalize_rdma_unaligned_sg(iser_task, |
| 692 | &iser_task->data[ISER_DIR_OUT], |
| 693 | &iser_task->data_copy[ISER_DIR_OUT], |
| 694 | ISER_DIR_OUT); |
Erez Zilber | 74a2078 | 2006-09-27 16:43:06 +0300 | [diff] [blame] | 695 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 696 | |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 697 | if (iser_task->prot_copy[ISER_DIR_IN].copy_buf != NULL) { |
| 698 | is_rdma_prot_aligned = 0; |
| 699 | iser_finalize_rdma_unaligned_sg(iser_task, |
| 700 | &iser_task->prot[ISER_DIR_IN], |
| 701 | &iser_task->prot_copy[ISER_DIR_IN], |
| 702 | ISER_DIR_IN); |
| 703 | } |
| 704 | |
| 705 | if (iser_task->prot_copy[ISER_DIR_OUT].copy_buf != NULL) { |
| 706 | is_rdma_prot_aligned = 0; |
| 707 | iser_finalize_rdma_unaligned_sg(iser_task, |
| 708 | &iser_task->prot[ISER_DIR_OUT], |
| 709 | &iser_task->prot_copy[ISER_DIR_OUT], |
| 710 | ISER_DIR_OUT); |
| 711 | } |
| 712 | |
Sagi Grimberg | 9a8b08f | 2014-03-05 19:43:44 +0200 | [diff] [blame] | 713 | if (iser_task->dir[ISER_DIR_IN]) { |
Sagi Grimberg | b4e155f | 2013-07-28 12:35:39 +0300 | [diff] [blame] | 714 | device->iser_unreg_rdma_mem(iser_task, ISER_DIR_IN); |
Sagi Grimberg | 9a8b08f | 2014-03-05 19:43:44 +0200 | [diff] [blame] | 715 | if (is_rdma_data_aligned) |
| 716 | iser_dma_unmap_task_data(iser_task, |
| 717 | &iser_task->data[ISER_DIR_IN]); |
Sagi Grimberg | 177e31bd | 2014-03-05 19:43:48 +0200 | [diff] [blame] | 718 | if (prot_count && is_rdma_prot_aligned) |
| 719 | iser_dma_unmap_task_data(iser_task, |
| 720 | &iser_task->prot[ISER_DIR_IN]); |
Sagi Grimberg | 9a8b08f | 2014-03-05 19:43:44 +0200 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | if (iser_task->dir[ISER_DIR_OUT]) { |
Sagi Grimberg | b4e155f | 2013-07-28 12:35:39 +0300 | [diff] [blame] | 724 | device->iser_unreg_rdma_mem(iser_task, ISER_DIR_OUT); |
Sagi Grimberg | 9a8b08f | 2014-03-05 19:43:44 +0200 | [diff] [blame] | 725 | if (is_rdma_data_aligned) |
| 726 | iser_dma_unmap_task_data(iser_task, |
| 727 | &iser_task->data[ISER_DIR_OUT]); |
| 728 | if (prot_count && is_rdma_prot_aligned) |
| 729 | iser_dma_unmap_task_data(iser_task, |
| 730 | &iser_task->prot[ISER_DIR_OUT]); |
| 731 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 732 | } |