Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2004, 2005, 2006 Voltaire, Inc. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 31 | */ |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/slab.h> |
| 34 | #include <linux/mm.h> |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 35 | #include <linux/scatterlist.h> |
| 36 | #include <linux/kfifo.h> |
| 37 | #include <scsi/scsi_cmnd.h> |
| 38 | #include <scsi/scsi_host.h> |
| 39 | |
| 40 | #include "iscsi_iser.h" |
| 41 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 42 | |
| 43 | /* iser_dto_add_regd_buff - increments the reference count for * |
| 44 | * the registered buffer & adds it to the DTO object */ |
| 45 | static void iser_dto_add_regd_buff(struct iser_dto *dto, |
| 46 | struct iser_regd_buf *regd_buf, |
| 47 | unsigned long use_offset, |
| 48 | unsigned long use_size) |
| 49 | { |
| 50 | int add_idx; |
| 51 | |
| 52 | atomic_inc(®d_buf->ref_count); |
| 53 | |
| 54 | add_idx = dto->regd_vector_len; |
| 55 | dto->regd[add_idx] = regd_buf; |
| 56 | dto->used_sz[add_idx] = use_size; |
| 57 | dto->offset[add_idx] = use_offset; |
| 58 | |
| 59 | dto->regd_vector_len++; |
| 60 | } |
| 61 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 62 | /* Register user buffer memory and initialize passive rdma |
| 63 | * dto descriptor. Total data size is stored in |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 64 | * iser_task->data[ISER_DIR_IN].data_len |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 65 | */ |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 66 | static int iser_prepare_read_cmd(struct iscsi_task *task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 67 | unsigned int edtl) |
| 68 | |
| 69 | { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 70 | struct iscsi_iser_task *iser_task = task->dd_data; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 71 | struct iser_regd_buf *regd_buf; |
| 72 | int err; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 73 | struct iser_hdr *hdr = &iser_task->desc.iser_header; |
| 74 | struct iser_data_buf *buf_in = &iser_task->data[ISER_DIR_IN]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 75 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 76 | err = iser_dma_map_task_data(iser_task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 77 | buf_in, |
| 78 | ISER_DIR_IN, |
| 79 | DMA_FROM_DEVICE); |
| 80 | if (err) |
| 81 | return err; |
| 82 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 83 | if (edtl > iser_task->data[ISER_DIR_IN].data_len) { |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 84 | iser_err("Total data length: %ld, less than EDTL: " |
| 85 | "%d, in READ cmd BHS itt: %d, conn: 0x%p\n", |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 86 | iser_task->data[ISER_DIR_IN].data_len, edtl, |
| 87 | task->itt, iser_task->iser_conn); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 88 | return -EINVAL; |
| 89 | } |
| 90 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 91 | err = iser_reg_rdma_mem(iser_task,ISER_DIR_IN); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 92 | if (err) { |
| 93 | iser_err("Failed to set up Data-IN RDMA\n"); |
| 94 | return err; |
| 95 | } |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 96 | regd_buf = &iser_task->rdma_regd[ISER_DIR_IN]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 97 | |
| 98 | hdr->flags |= ISER_RSV; |
| 99 | hdr->read_stag = cpu_to_be32(regd_buf->reg.rkey); |
| 100 | hdr->read_va = cpu_to_be64(regd_buf->reg.va); |
| 101 | |
| 102 | iser_dbg("Cmd itt:%d READ tags RKEY:%#.4X VA:%#llX\n", |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 103 | task->itt, regd_buf->reg.rkey, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 104 | (unsigned long long)regd_buf->reg.va); |
| 105 | |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | /* Register user buffer memory and initialize passive rdma |
| 110 | * dto descriptor. Total data size is stored in |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 111 | * task->data[ISER_DIR_OUT].data_len |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 112 | */ |
| 113 | static int |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 114 | iser_prepare_write_cmd(struct iscsi_task *task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 115 | unsigned int imm_sz, |
| 116 | unsigned int unsol_sz, |
| 117 | unsigned int edtl) |
| 118 | { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 119 | struct iscsi_iser_task *iser_task = task->dd_data; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 120 | struct iser_regd_buf *regd_buf; |
| 121 | int err; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 122 | struct iser_dto *send_dto = &iser_task->desc.dto; |
| 123 | struct iser_hdr *hdr = &iser_task->desc.iser_header; |
| 124 | struct iser_data_buf *buf_out = &iser_task->data[ISER_DIR_OUT]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 125 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 126 | err = iser_dma_map_task_data(iser_task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 127 | buf_out, |
| 128 | ISER_DIR_OUT, |
| 129 | DMA_TO_DEVICE); |
| 130 | if (err) |
| 131 | return err; |
| 132 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 133 | if (edtl > iser_task->data[ISER_DIR_OUT].data_len) { |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 134 | iser_err("Total data length: %ld, less than EDTL: %d, " |
| 135 | "in WRITE cmd BHS itt: %d, conn: 0x%p\n", |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 136 | iser_task->data[ISER_DIR_OUT].data_len, |
| 137 | edtl, task->itt, task->conn); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 138 | return -EINVAL; |
| 139 | } |
| 140 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 141 | err = iser_reg_rdma_mem(iser_task,ISER_DIR_OUT); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 142 | if (err != 0) { |
| 143 | iser_err("Failed to register write cmd RDMA mem\n"); |
| 144 | return err; |
| 145 | } |
| 146 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 147 | regd_buf = &iser_task->rdma_regd[ISER_DIR_OUT]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 148 | |
| 149 | if (unsol_sz < edtl) { |
| 150 | hdr->flags |= ISER_WSV; |
| 151 | hdr->write_stag = cpu_to_be32(regd_buf->reg.rkey); |
| 152 | hdr->write_va = cpu_to_be64(regd_buf->reg.va + unsol_sz); |
| 153 | |
| 154 | iser_dbg("Cmd itt:%d, WRITE tags, RKEY:%#.4X " |
| 155 | "VA:%#llX + unsol:%d\n", |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 156 | task->itt, regd_buf->reg.rkey, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 157 | (unsigned long long)regd_buf->reg.va, unsol_sz); |
| 158 | } |
| 159 | |
| 160 | if (imm_sz > 0) { |
| 161 | iser_dbg("Cmd itt:%d, WRITE, adding imm.data sz: %d\n", |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 162 | task->itt, imm_sz); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 163 | iser_dto_add_regd_buff(send_dto, |
| 164 | regd_buf, |
| 165 | 0, |
| 166 | imm_sz); |
| 167 | } |
| 168 | |
| 169 | return 0; |
| 170 | } |
| 171 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 172 | /* creates a new tx descriptor and adds header regd buffer */ |
| 173 | static void iser_create_send_desc(struct iscsi_iser_conn *iser_conn, |
| 174 | struct iser_desc *tx_desc) |
| 175 | { |
| 176 | struct iser_regd_buf *regd_hdr = &tx_desc->hdr_regd_buf; |
| 177 | struct iser_dto *send_dto = &tx_desc->dto; |
| 178 | |
| 179 | memset(regd_hdr, 0, sizeof(struct iser_regd_buf)); |
| 180 | regd_hdr->device = iser_conn->ib_conn->device; |
| 181 | regd_hdr->virt_addr = tx_desc; /* == &tx_desc->iser_header */ |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 182 | regd_hdr->data_size = ISER_HEADERS_LEN; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 183 | |
Erez Zilber | 87e8df7 | 2006-09-27 15:27:10 +0300 | [diff] [blame] | 184 | send_dto->ib_conn = iser_conn->ib_conn; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 185 | send_dto->notify_enable = 1; |
| 186 | send_dto->regd_vector_len = 0; |
| 187 | |
| 188 | memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr)); |
| 189 | tx_desc->iser_header.flags = ISER_VER; |
| 190 | |
| 191 | iser_dto_add_regd_buff(send_dto, regd_hdr, 0, 0); |
| 192 | } |
| 193 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 194 | int iser_alloc_rx_descriptors(struct iser_conn *ib_conn) |
| 195 | { |
| 196 | int i, j; |
| 197 | u64 dma_addr; |
| 198 | struct iser_rx_desc *rx_desc; |
| 199 | struct ib_sge *rx_sg; |
| 200 | struct iser_device *device = ib_conn->device; |
| 201 | |
| 202 | ib_conn->rx_descs = kmalloc(ISER_QP_MAX_RECV_DTOS * |
| 203 | sizeof(struct iser_rx_desc), GFP_KERNEL); |
| 204 | if (!ib_conn->rx_descs) |
| 205 | goto rx_desc_alloc_fail; |
| 206 | |
| 207 | rx_desc = ib_conn->rx_descs; |
| 208 | |
| 209 | for (i = 0; i < ISER_QP_MAX_RECV_DTOS; i++, rx_desc++) { |
| 210 | dma_addr = ib_dma_map_single(device->ib_device, (void *)rx_desc, |
| 211 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); |
| 212 | if (ib_dma_mapping_error(device->ib_device, dma_addr)) |
| 213 | goto rx_desc_dma_map_failed; |
| 214 | |
| 215 | rx_desc->dma_addr = dma_addr; |
| 216 | |
| 217 | rx_sg = &rx_desc->rx_sg; |
| 218 | rx_sg->addr = rx_desc->dma_addr; |
| 219 | rx_sg->length = ISER_RX_PAYLOAD_SIZE; |
| 220 | rx_sg->lkey = device->mr->lkey; |
| 221 | } |
| 222 | |
| 223 | ib_conn->rx_desc_head = 0; |
| 224 | return 0; |
| 225 | |
| 226 | rx_desc_dma_map_failed: |
| 227 | rx_desc = ib_conn->rx_descs; |
| 228 | for (j = 0; j < i; j++, rx_desc++) |
| 229 | ib_dma_unmap_single(device->ib_device, rx_desc->dma_addr, |
| 230 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); |
| 231 | kfree(ib_conn->rx_descs); |
| 232 | ib_conn->rx_descs = NULL; |
| 233 | rx_desc_alloc_fail: |
| 234 | iser_err("failed allocating rx descriptors / data buffers\n"); |
| 235 | return -ENOMEM; |
| 236 | } |
| 237 | |
| 238 | void iser_free_rx_descriptors(struct iser_conn *ib_conn) |
| 239 | { |
| 240 | int i; |
| 241 | struct iser_rx_desc *rx_desc; |
| 242 | struct iser_device *device = ib_conn->device; |
| 243 | |
| 244 | if (ib_conn->login_buf) { |
| 245 | ib_dma_unmap_single(device->ib_device, ib_conn->login_dma, |
| 246 | ISER_RX_LOGIN_SIZE, DMA_FROM_DEVICE); |
| 247 | kfree(ib_conn->login_buf); |
| 248 | } |
| 249 | |
| 250 | if (!ib_conn->rx_descs) |
| 251 | return; |
| 252 | |
| 253 | rx_desc = ib_conn->rx_descs; |
| 254 | for (i = 0; i < ISER_QP_MAX_RECV_DTOS; i++, rx_desc++) |
| 255 | ib_dma_unmap_single(device->ib_device, rx_desc->dma_addr, |
| 256 | ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE); |
| 257 | kfree(ib_conn->rx_descs); |
| 258 | } |
| 259 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 260 | /** |
| 261 | * iser_conn_set_full_featured_mode - (iSER API) |
| 262 | */ |
| 263 | int iser_conn_set_full_featured_mode(struct iscsi_conn *conn) |
| 264 | { |
| 265 | struct iscsi_iser_conn *iser_conn = conn->dd_data; |
| 266 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 267 | iser_dbg("Initially post: %d\n", ISER_MIN_POSTED_RX); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 268 | |
| 269 | /* Check that there is no posted recv or send buffers left - */ |
| 270 | /* they must be consumed during the login phase */ |
Or Gerlitz | 704315f | 2010-02-08 13:18:39 +0000 | [diff] [blame^] | 271 | BUG_ON(iser_conn->ib_conn->post_recv_buf_count != 0); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 272 | BUG_ON(atomic_read(&iser_conn->ib_conn->post_send_buf_count) != 0); |
| 273 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 274 | if (iser_alloc_rx_descriptors(iser_conn->ib_conn)) |
| 275 | return -ENOMEM; |
| 276 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 277 | /* Initial post receive buffers */ |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 278 | if (iser_post_recvm(iser_conn->ib_conn, ISER_MIN_POSTED_RX)) |
| 279 | return -ENOMEM; |
| 280 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static int |
| 285 | iser_check_xmit(struct iscsi_conn *conn, void *task) |
| 286 | { |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 287 | struct iscsi_iser_conn *iser_conn = conn->dd_data; |
| 288 | |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 289 | if (atomic_read(&iser_conn->ib_conn->post_send_buf_count) == |
| 290 | ISER_QP_MAX_REQ_DTOS) { |
Erez Zilber | f093840 | 2007-01-07 12:28:02 +0200 | [diff] [blame] | 291 | iser_dbg("%ld can't xmit task %p\n",jiffies,task); |
| 292 | return -ENOBUFS; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 293 | } |
Erez Zilber | f093840 | 2007-01-07 12:28:02 +0200 | [diff] [blame] | 294 | return 0; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | |
| 298 | /** |
| 299 | * iser_send_command - send command PDU |
| 300 | */ |
Mike Christie | 2747fdb | 2008-05-21 15:54:08 -0500 | [diff] [blame] | 301 | int iser_send_command(struct iscsi_conn *conn, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 302 | struct iscsi_task *task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 303 | { |
| 304 | struct iscsi_iser_conn *iser_conn = conn->dd_data; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 305 | struct iscsi_iser_task *iser_task = task->dd_data; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 306 | struct iser_dto *send_dto = NULL; |
| 307 | unsigned long edtl; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 308 | int err; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 309 | struct iser_data_buf *data_buf; |
Mike Christie | 0f9c744 | 2008-12-02 00:32:06 -0600 | [diff] [blame] | 310 | struct iscsi_cmd *hdr = (struct iscsi_cmd *)task->hdr; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 311 | struct scsi_cmnd *sc = task->sc; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 312 | |
| 313 | if (!iser_conn_state_comp(iser_conn->ib_conn, ISER_CONN_UP)) { |
| 314 | iser_err("Failed to send, conn: 0x%p is not up\n", iser_conn->ib_conn); |
| 315 | return -EPERM; |
| 316 | } |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 317 | if (iser_check_xmit(conn, task)) |
Erez Zilber | f093840 | 2007-01-07 12:28:02 +0200 | [diff] [blame] | 318 | return -ENOBUFS; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 319 | |
| 320 | edtl = ntohl(hdr->data_length); |
| 321 | |
| 322 | /* build the tx desc regd header and add it to the tx desc dto */ |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 323 | iser_task->desc.type = ISCSI_TX_SCSI_COMMAND; |
| 324 | send_dto = &iser_task->desc.dto; |
| 325 | send_dto->task = iser_task; |
| 326 | iser_create_send_desc(iser_conn, &iser_task->desc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 327 | |
| 328 | if (hdr->flags & ISCSI_FLAG_CMD_READ) |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 329 | data_buf = &iser_task->data[ISER_DIR_IN]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 330 | else |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 331 | data_buf = &iser_task->data[ISER_DIR_OUT]; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 332 | |
FUJITA Tomonori | da9c0c7 | 2007-06-01 18:56:21 +0900 | [diff] [blame] | 333 | if (scsi_sg_count(sc)) { /* using a scatter list */ |
| 334 | data_buf->buf = scsi_sglist(sc); |
| 335 | data_buf->size = scsi_sg_count(sc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 336 | } |
| 337 | |
FUJITA Tomonori | da9c0c7 | 2007-06-01 18:56:21 +0900 | [diff] [blame] | 338 | data_buf->data_len = scsi_bufflen(sc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 339 | |
| 340 | if (hdr->flags & ISCSI_FLAG_CMD_READ) { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 341 | err = iser_prepare_read_cmd(task, edtl); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 342 | if (err) |
| 343 | goto send_command_error; |
| 344 | } |
| 345 | if (hdr->flags & ISCSI_FLAG_CMD_WRITE) { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 346 | err = iser_prepare_write_cmd(task, |
| 347 | task->imm_count, |
| 348 | task->imm_count + |
Mike Christie | 0f9c744 | 2008-12-02 00:32:06 -0600 | [diff] [blame] | 349 | task->unsol_r2t.data_length, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 350 | edtl); |
| 351 | if (err) |
| 352 | goto send_command_error; |
| 353 | } |
| 354 | |
| 355 | iser_reg_single(iser_conn->ib_conn->device, |
| 356 | send_dto->regd[0], DMA_TO_DEVICE); |
| 357 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 358 | iser_task->status = ISER_TASK_STATUS_STARTED; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 359 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 360 | err = iser_post_send(&iser_task->desc); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 361 | if (!err) |
| 362 | return 0; |
| 363 | |
| 364 | send_command_error: |
| 365 | iser_dto_buffs_release(send_dto); |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 366 | 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] | 367 | return err; |
| 368 | } |
| 369 | |
| 370 | /** |
| 371 | * iser_send_data_out - send data out PDU |
| 372 | */ |
Mike Christie | 2747fdb | 2008-05-21 15:54:08 -0500 | [diff] [blame] | 373 | int iser_send_data_out(struct iscsi_conn *conn, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 374 | struct iscsi_task *task, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 375 | struct iscsi_data *hdr) |
| 376 | { |
| 377 | struct iscsi_iser_conn *iser_conn = conn->dd_data; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 378 | struct iscsi_iser_task *iser_task = task->dd_data; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 379 | struct iser_desc *tx_desc = NULL; |
| 380 | struct iser_dto *send_dto = NULL; |
| 381 | unsigned long buf_offset; |
| 382 | unsigned long data_seg_len; |
Erez Zilber | 0a22ab9 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 383 | uint32_t itt; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 384 | int err = 0; |
| 385 | |
| 386 | if (!iser_conn_state_comp(iser_conn->ib_conn, ISER_CONN_UP)) { |
| 387 | iser_err("Failed to send, conn: 0x%p is not up\n", iser_conn->ib_conn); |
| 388 | return -EPERM; |
| 389 | } |
| 390 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 391 | if (iser_check_xmit(conn, task)) |
Erez Zilber | f093840 | 2007-01-07 12:28:02 +0200 | [diff] [blame] | 392 | return -ENOBUFS; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 393 | |
Erez Zilber | 0a22ab9 | 2008-04-16 21:09:35 -0700 | [diff] [blame] | 394 | itt = (__force uint32_t)hdr->itt; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 395 | data_seg_len = ntoh24(hdr->dlength); |
| 396 | buf_offset = ntohl(hdr->offset); |
| 397 | |
| 398 | iser_dbg("%s itt %d dseg_len %d offset %d\n", |
| 399 | __func__,(int)itt,(int)data_seg_len,(int)buf_offset); |
| 400 | |
| 401 | tx_desc = kmem_cache_alloc(ig.desc_cache, GFP_NOIO); |
| 402 | if (tx_desc == NULL) { |
| 403 | iser_err("Failed to alloc desc for post dataout\n"); |
| 404 | return -ENOMEM; |
| 405 | } |
| 406 | |
| 407 | tx_desc->type = ISCSI_TX_DATAOUT; |
| 408 | memcpy(&tx_desc->iscsi_header, hdr, sizeof(struct iscsi_hdr)); |
| 409 | |
| 410 | /* build the tx desc regd header and add it to the tx desc dto */ |
| 411 | send_dto = &tx_desc->dto; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 412 | send_dto->task = iser_task; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 413 | iser_create_send_desc(iser_conn, tx_desc); |
| 414 | |
| 415 | iser_reg_single(iser_conn->ib_conn->device, |
| 416 | send_dto->regd[0], DMA_TO_DEVICE); |
| 417 | |
| 418 | /* all data was registered for RDMA, we can use the lkey */ |
| 419 | iser_dto_add_regd_buff(send_dto, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 420 | &iser_task->rdma_regd[ISER_DIR_OUT], |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 421 | buf_offset, |
| 422 | data_seg_len); |
| 423 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 424 | 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] | 425 | iser_err("Offset:%ld & DSL:%ld in Data-Out " |
| 426 | "inconsistent with total len:%ld, itt:%d\n", |
| 427 | buf_offset, data_seg_len, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 428 | iser_task->data[ISER_DIR_OUT].data_len, itt); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 429 | err = -EINVAL; |
| 430 | goto send_data_out_error; |
| 431 | } |
| 432 | iser_dbg("data-out itt: %d, offset: %ld, sz: %ld\n", |
| 433 | itt, buf_offset, data_seg_len); |
| 434 | |
| 435 | |
| 436 | err = iser_post_send(tx_desc); |
| 437 | if (!err) |
| 438 | return 0; |
| 439 | |
| 440 | send_data_out_error: |
| 441 | iser_dto_buffs_release(send_dto); |
| 442 | kmem_cache_free(ig.desc_cache, tx_desc); |
| 443 | iser_err("conn %p failed err %d\n",conn, err); |
| 444 | return err; |
| 445 | } |
| 446 | |
| 447 | int iser_send_control(struct iscsi_conn *conn, |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 448 | struct iscsi_task *task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 449 | { |
| 450 | struct iscsi_iser_conn *iser_conn = conn->dd_data; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 451 | struct iscsi_iser_task *iser_task = task->dd_data; |
| 452 | struct iser_desc *mdesc = &iser_task->desc; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 453 | struct iser_dto *send_dto = NULL; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 454 | unsigned long data_seg_len; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 455 | int err; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 456 | struct iser_regd_buf *regd_buf; |
| 457 | struct iser_device *device; |
| 458 | |
| 459 | if (!iser_conn_state_comp(iser_conn->ib_conn, ISER_CONN_UP)) { |
| 460 | iser_err("Failed to send, conn: 0x%p is not up\n", iser_conn->ib_conn); |
| 461 | return -EPERM; |
| 462 | } |
| 463 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 464 | if (iser_check_xmit(conn, task)) |
Erez Zilber | f093840 | 2007-01-07 12:28:02 +0200 | [diff] [blame] | 465 | return -ENOBUFS; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 466 | |
| 467 | /* build the tx desc regd header and add it to the tx desc dto */ |
| 468 | mdesc->type = ISCSI_TX_CONTROL; |
| 469 | send_dto = &mdesc->dto; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 470 | send_dto->task = NULL; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 471 | iser_create_send_desc(iser_conn, mdesc); |
| 472 | |
| 473 | device = iser_conn->ib_conn->device; |
| 474 | |
| 475 | iser_reg_single(device, send_dto->regd[0], DMA_TO_DEVICE); |
| 476 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 477 | data_seg_len = ntoh24(task->hdr->dlength); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 478 | |
| 479 | if (data_seg_len > 0) { |
| 480 | regd_buf = &mdesc->data_regd_buf; |
| 481 | memset(regd_buf, 0, sizeof(struct iser_regd_buf)); |
| 482 | regd_buf->device = device; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 483 | regd_buf->virt_addr = task->data; |
| 484 | regd_buf->data_size = task->data_count; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 485 | iser_reg_single(device, regd_buf, |
| 486 | DMA_TO_DEVICE); |
| 487 | iser_dto_add_regd_buff(send_dto, regd_buf, |
| 488 | 0, |
| 489 | data_seg_len); |
| 490 | } |
| 491 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 492 | if (task == conn->login_task) { |
| 493 | err = iser_post_recvl(iser_conn->ib_conn); |
| 494 | if (err) |
| 495 | goto send_control_error; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | err = iser_post_send(mdesc); |
| 499 | if (!err) |
| 500 | return 0; |
| 501 | |
| 502 | send_control_error: |
| 503 | iser_dto_buffs_release(send_dto); |
| 504 | iser_err("conn %p failed err %d\n",conn, err); |
| 505 | return err; |
| 506 | } |
| 507 | |
| 508 | /** |
| 509 | * iser_rcv_dto_completion - recv DTO completion |
| 510 | */ |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 511 | void iser_rcv_completion(struct iser_rx_desc *rx_desc, |
| 512 | unsigned long rx_xfer_len, |
| 513 | struct iser_conn *ib_conn) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 514 | { |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 515 | struct iscsi_iser_conn *conn = ib_conn->iser_conn; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 516 | struct iscsi_task *task; |
| 517 | struct iscsi_iser_task *iser_task; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 518 | struct iscsi_hdr *hdr; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 519 | unsigned char opcode; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 520 | u64 rx_dma; |
| 521 | int rx_buflen, outstanding, count, err; |
| 522 | |
| 523 | /* differentiate between login to all other PDUs */ |
| 524 | if ((char *)rx_desc == ib_conn->login_buf) { |
| 525 | rx_dma = ib_conn->login_dma; |
| 526 | rx_buflen = ISER_RX_LOGIN_SIZE; |
| 527 | } else { |
| 528 | rx_dma = rx_desc->dma_addr; |
| 529 | rx_buflen = ISER_RX_PAYLOAD_SIZE; |
| 530 | } |
| 531 | |
| 532 | ib_dma_sync_single_for_cpu(ib_conn->device->ib_device, rx_dma, |
| 533 | rx_buflen, DMA_FROM_DEVICE); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 534 | |
| 535 | hdr = &rx_desc->iscsi_header; |
| 536 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 537 | iser_dbg("op 0x%x itt 0x%x dlen %d\n", hdr->opcode, |
| 538 | hdr->itt, (int)(rx_xfer_len - ISER_HEADERS_LEN)); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 539 | |
| 540 | opcode = hdr->opcode & ISCSI_OPCODE_MASK; |
| 541 | |
| 542 | if (opcode == ISCSI_OP_SCSI_CMD_RSP) { |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 543 | spin_lock(&conn->iscsi_conn->session->lock); |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 544 | task = iscsi_itt_to_ctask(conn->iscsi_conn, hdr->itt); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 545 | if (task) |
| 546 | __iscsi_get_task(task); |
| 547 | spin_unlock(&conn->iscsi_conn->session->lock); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 548 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 549 | if (!task) |
| 550 | iser_err("itt can't be matched to task!!! " |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 551 | "conn %p opcode %d itt %d\n", |
| 552 | conn->iscsi_conn, opcode, hdr->itt); |
| 553 | else { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 554 | iser_task = task->dd_data; |
| 555 | iser_dbg("itt %d task %p\n",hdr->itt, task); |
| 556 | iser_task->status = ISER_TASK_STATUS_COMPLETED; |
| 557 | iser_task_rdma_finalize(iser_task); |
Mike Christie | 913e5bf | 2008-05-21 15:54:18 -0500 | [diff] [blame] | 558 | iscsi_put_task(task); |
Mike Christie | 0af967f | 2008-05-21 15:54:04 -0500 | [diff] [blame] | 559 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 560 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 561 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 562 | iscsi_iser_recv(conn->iscsi_conn, hdr, |
| 563 | rx_desc->data, rx_xfer_len - ISER_HEADERS_LEN); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 564 | |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 565 | ib_dma_sync_single_for_device(ib_conn->device->ib_device, rx_dma, |
| 566 | rx_buflen, DMA_FROM_DEVICE); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 567 | |
| 568 | /* decrementing conn->post_recv_buf_count only --after-- freeing the * |
| 569 | * task eliminates the need to worry on tasks which are completed in * |
| 570 | * parallel to the execution of iser_conn_term. So the code that waits * |
| 571 | * for the posted rx bufs refcount to become zero handles everything */ |
Or Gerlitz | 704315f | 2010-02-08 13:18:39 +0000 | [diff] [blame^] | 572 | conn->ib_conn->post_recv_buf_count--; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 573 | |
| 574 | if (rx_dma == ib_conn->login_dma) |
| 575 | return; |
| 576 | |
Or Gerlitz | 704315f | 2010-02-08 13:18:39 +0000 | [diff] [blame^] | 577 | outstanding = ib_conn->post_recv_buf_count; |
Or Gerlitz | bcc60c3 | 2010-02-08 13:17:42 +0000 | [diff] [blame] | 578 | if (outstanding + ISER_MIN_POSTED_RX <= ISER_QP_MAX_RECV_DTOS) { |
| 579 | count = min(ISER_QP_MAX_RECV_DTOS - outstanding, |
| 580 | ISER_MIN_POSTED_RX); |
| 581 | err = iser_post_recvm(ib_conn, count); |
| 582 | if (err) |
| 583 | iser_err("posting %d rx bufs err %d\n", count, err); |
| 584 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | void iser_snd_completion(struct iser_desc *tx_desc) |
| 588 | { |
| 589 | struct iser_dto *dto = &tx_desc->dto; |
Erez Zilber | 87e8df7 | 2006-09-27 15:27:10 +0300 | [diff] [blame] | 590 | struct iser_conn *ib_conn = dto->ib_conn; |
| 591 | struct iscsi_iser_conn *iser_conn = ib_conn->iser_conn; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 592 | struct iscsi_conn *conn = iser_conn->iscsi_conn; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 593 | struct iscsi_task *task; |
Erez Zilber | f093840 | 2007-01-07 12:28:02 +0200 | [diff] [blame] | 594 | int resume_tx = 0; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 595 | |
| 596 | iser_dbg("Initiator, Data sent dto=0x%p\n", dto); |
| 597 | |
| 598 | iser_dto_buffs_release(dto); |
| 599 | |
| 600 | if (tx_desc->type == ISCSI_TX_DATAOUT) |
| 601 | kmem_cache_free(ig.desc_cache, tx_desc); |
| 602 | |
Erez Zilber | f093840 | 2007-01-07 12:28:02 +0200 | [diff] [blame] | 603 | if (atomic_read(&iser_conn->ib_conn->post_send_buf_count) == |
| 604 | ISER_QP_MAX_REQ_DTOS) |
| 605 | resume_tx = 1; |
| 606 | |
Erez Zilber | 87e8df7 | 2006-09-27 15:27:10 +0300 | [diff] [blame] | 607 | atomic_dec(&ib_conn->post_send_buf_count); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 608 | |
Erez Zilber | f093840 | 2007-01-07 12:28:02 +0200 | [diff] [blame] | 609 | if (resume_tx) { |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 610 | iser_dbg("%ld resuming tx\n",jiffies); |
Mike Christie | 32ae763 | 2009-03-05 14:46:03 -0600 | [diff] [blame] | 611 | iscsi_conn_queue_work(conn); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 612 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 613 | |
| 614 | if (tx_desc->type == ISCSI_TX_CONTROL) { |
| 615 | /* this arithmetic is legal by libiscsi dd_data allocation */ |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 616 | task = (void *) ((long)(void *)tx_desc - |
| 617 | sizeof(struct iscsi_task)); |
| 618 | if (task->hdr->itt == RESERVED_ITT) |
| 619 | iscsi_put_task(task); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 620 | } |
| 621 | } |
| 622 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 623 | void iser_task_rdma_init(struct iscsi_iser_task *iser_task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 624 | |
| 625 | { |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 626 | iser_task->status = ISER_TASK_STATUS_INIT; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 627 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 628 | iser_task->dir[ISER_DIR_IN] = 0; |
| 629 | iser_task->dir[ISER_DIR_OUT] = 0; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 630 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 631 | iser_task->data[ISER_DIR_IN].data_len = 0; |
| 632 | iser_task->data[ISER_DIR_OUT].data_len = 0; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 633 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 634 | memset(&iser_task->rdma_regd[ISER_DIR_IN], 0, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 635 | sizeof(struct iser_regd_buf)); |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 636 | memset(&iser_task->rdma_regd[ISER_DIR_OUT], 0, |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 637 | sizeof(struct iser_regd_buf)); |
| 638 | } |
| 639 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 640 | void iser_task_rdma_finalize(struct iscsi_iser_task *iser_task) |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 641 | { |
| 642 | int deferred; |
Erez Zilber | 74a2078 | 2006-09-27 16:43:06 +0300 | [diff] [blame] | 643 | int is_rdma_aligned = 1; |
Erez Zilber | 3104a21 | 2007-03-25 12:07:10 +0200 | [diff] [blame] | 644 | struct iser_regd_buf *regd; |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 645 | |
| 646 | /* if we were reading, copy back to unaligned sglist, |
| 647 | * anyway dma_unmap and free the copy |
| 648 | */ |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 649 | if (iser_task->data_copy[ISER_DIR_IN].copy_buf != NULL) { |
Erez Zilber | 74a2078 | 2006-09-27 16:43:06 +0300 | [diff] [blame] | 650 | is_rdma_aligned = 0; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 651 | iser_finalize_rdma_unaligned_sg(iser_task, ISER_DIR_IN); |
Erez Zilber | 74a2078 | 2006-09-27 16:43:06 +0300 | [diff] [blame] | 652 | } |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 653 | if (iser_task->data_copy[ISER_DIR_OUT].copy_buf != NULL) { |
Erez Zilber | 74a2078 | 2006-09-27 16:43:06 +0300 | [diff] [blame] | 654 | is_rdma_aligned = 0; |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 655 | iser_finalize_rdma_unaligned_sg(iser_task, ISER_DIR_OUT); |
Erez Zilber | 74a2078 | 2006-09-27 16:43:06 +0300 | [diff] [blame] | 656 | } |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 657 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 658 | if (iser_task->dir[ISER_DIR_IN]) { |
| 659 | regd = &iser_task->rdma_regd[ISER_DIR_IN]; |
Erez Zilber | 3104a21 | 2007-03-25 12:07:10 +0200 | [diff] [blame] | 660 | deferred = iser_regd_buff_release(regd); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 661 | if (deferred) { |
Erez Zilber | 3104a21 | 2007-03-25 12:07:10 +0200 | [diff] [blame] | 662 | iser_err("%d references remain for BUF-IN rdma reg\n", |
| 663 | atomic_read(®d->ref_count)); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 664 | } |
| 665 | } |
| 666 | |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 667 | if (iser_task->dir[ISER_DIR_OUT]) { |
| 668 | regd = &iser_task->rdma_regd[ISER_DIR_OUT]; |
Erez Zilber | 3104a21 | 2007-03-25 12:07:10 +0200 | [diff] [blame] | 669 | deferred = iser_regd_buff_release(regd); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 670 | if (deferred) { |
Erez Zilber | 3104a21 | 2007-03-25 12:07:10 +0200 | [diff] [blame] | 671 | iser_err("%d references remain for BUF-OUT rdma reg\n", |
| 672 | atomic_read(®d->ref_count)); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 673 | } |
| 674 | } |
| 675 | |
Erez Zilber | 74a2078 | 2006-09-27 16:43:06 +0300 | [diff] [blame] | 676 | /* if the data was unaligned, it was already unmapped and then copied */ |
| 677 | if (is_rdma_aligned) |
Mike Christie | 2261ec3 | 2008-05-21 15:54:11 -0500 | [diff] [blame] | 678 | iser_dma_unmap_task_data(iser_task); |
Or Gerlitz | e85b24b | 2006-05-11 10:02:19 +0300 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | void iser_dto_buffs_release(struct iser_dto *dto) |
| 682 | { |
| 683 | int i; |
| 684 | |
| 685 | for (i = 0; i < dto->regd_vector_len; i++) |
| 686 | iser_regd_buff_release(dto->regd[i]); |
| 687 | } |
| 688 | |