Michael Chan | cf4e636 | 2009-06-08 18:14:44 -0700 | [diff] [blame] | 1 | /* |
| 2 | * bnx2i_iscsi.c: Broadcom NetXtreme II iSCSI driver. |
| 3 | * |
| 4 | * Copyright (c) 2006 - 2009 Broadcom Corporation |
| 5 | * Copyright (c) 2007, 2008 Red Hat, Inc. All rights reserved. |
| 6 | * Copyright (c) 2007, 2008 Mike Christie |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation. |
| 11 | * |
| 12 | * Written by: Anil Veerabhadrappa (anilgv@broadcom.com) |
| 13 | */ |
| 14 | |
| 15 | #include <scsi/scsi_tcq.h> |
| 16 | #include <scsi/libiscsi.h> |
| 17 | #include "bnx2i.h" |
| 18 | |
| 19 | struct scsi_transport_template *bnx2i_scsi_xport_template; |
| 20 | struct iscsi_transport bnx2i_iscsi_transport; |
| 21 | static struct scsi_host_template bnx2i_host_template; |
| 22 | |
| 23 | /* |
| 24 | * Global endpoint resource info |
| 25 | */ |
| 26 | static DEFINE_SPINLOCK(bnx2i_resc_lock); /* protects global resources */ |
| 27 | |
| 28 | |
| 29 | static int bnx2i_adapter_ready(struct bnx2i_hba *hba) |
| 30 | { |
| 31 | int retval = 0; |
| 32 | |
| 33 | if (!hba || !test_bit(ADAPTER_STATE_UP, &hba->adapter_state) || |
| 34 | test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) || |
| 35 | test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state)) |
| 36 | retval = -EPERM; |
| 37 | return retval; |
| 38 | } |
| 39 | |
| 40 | /** |
| 41 | * bnx2i_get_write_cmd_bd_idx - identifies various BD bookmarks |
| 42 | * @cmd: iscsi cmd struct pointer |
| 43 | * @buf_off: absolute buffer offset |
| 44 | * @start_bd_off: u32 pointer to return the offset within the BD |
| 45 | * indicated by 'start_bd_idx' on which 'buf_off' falls |
| 46 | * @start_bd_idx: index of the BD on which 'buf_off' falls |
| 47 | * |
| 48 | * identifies & marks various bd info for scsi command's imm data, |
| 49 | * unsolicited data and the first solicited data seq. |
| 50 | */ |
| 51 | static void bnx2i_get_write_cmd_bd_idx(struct bnx2i_cmd *cmd, u32 buf_off, |
| 52 | u32 *start_bd_off, u32 *start_bd_idx) |
| 53 | { |
| 54 | struct iscsi_bd *bd_tbl = cmd->io_tbl.bd_tbl; |
| 55 | u32 cur_offset = 0; |
| 56 | u32 cur_bd_idx = 0; |
| 57 | |
| 58 | if (buf_off) { |
| 59 | while (buf_off >= (cur_offset + bd_tbl->buffer_length)) { |
| 60 | cur_offset += bd_tbl->buffer_length; |
| 61 | cur_bd_idx++; |
| 62 | bd_tbl++; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | *start_bd_off = buf_off - cur_offset; |
| 67 | *start_bd_idx = cur_bd_idx; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * bnx2i_setup_write_cmd_bd_info - sets up BD various information |
| 72 | * @task: transport layer's cmd struct pointer |
| 73 | * |
| 74 | * identifies & marks various bd info for scsi command's immediate data, |
| 75 | * unsolicited data and first solicited data seq which includes BD start |
| 76 | * index & BD buf off. his function takes into account iscsi parameter such |
| 77 | * as immediate data and unsolicited data is support on this connection. |
| 78 | */ |
| 79 | static void bnx2i_setup_write_cmd_bd_info(struct iscsi_task *task) |
| 80 | { |
| 81 | struct bnx2i_cmd *cmd = task->dd_data; |
| 82 | u32 start_bd_offset; |
| 83 | u32 start_bd_idx; |
| 84 | u32 buffer_offset = 0; |
| 85 | u32 cmd_len = cmd->req.total_data_transfer_length; |
| 86 | |
| 87 | /* if ImmediateData is turned off & IntialR2T is turned on, |
| 88 | * there will be no immediate or unsolicited data, just return. |
| 89 | */ |
| 90 | if (!iscsi_task_has_unsol_data(task) && !task->imm_count) |
| 91 | return; |
| 92 | |
| 93 | /* Immediate data */ |
| 94 | buffer_offset += task->imm_count; |
| 95 | if (task->imm_count == cmd_len) |
| 96 | return; |
| 97 | |
| 98 | if (iscsi_task_has_unsol_data(task)) { |
| 99 | bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, |
| 100 | &start_bd_offset, &start_bd_idx); |
| 101 | cmd->req.ud_buffer_offset = start_bd_offset; |
| 102 | cmd->req.ud_start_bd_index = start_bd_idx; |
| 103 | buffer_offset += task->unsol_r2t.data_length; |
| 104 | } |
| 105 | |
| 106 | if (buffer_offset != cmd_len) { |
| 107 | bnx2i_get_write_cmd_bd_idx(cmd, buffer_offset, |
| 108 | &start_bd_offset, &start_bd_idx); |
| 109 | if ((start_bd_offset > task->conn->session->first_burst) || |
| 110 | (start_bd_idx > scsi_sg_count(cmd->scsi_cmd))) { |
| 111 | int i = 0; |
| 112 | |
| 113 | iscsi_conn_printk(KERN_ALERT, task->conn, |
| 114 | "bnx2i- error, buf offset 0x%x " |
| 115 | "bd_valid %d use_sg %d\n", |
| 116 | buffer_offset, cmd->io_tbl.bd_valid, |
| 117 | scsi_sg_count(cmd->scsi_cmd)); |
| 118 | for (i = 0; i < cmd->io_tbl.bd_valid; i++) |
| 119 | iscsi_conn_printk(KERN_ALERT, task->conn, |
| 120 | "bnx2i err, bd[%d]: len %x\n", |
| 121 | i, cmd->io_tbl.bd_tbl[i].\ |
| 122 | buffer_length); |
| 123 | } |
| 124 | cmd->req.sd_buffer_offset = start_bd_offset; |
| 125 | cmd->req.sd_start_bd_index = start_bd_idx; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | |
| 130 | |
| 131 | /** |
| 132 | * bnx2i_map_scsi_sg - maps IO buffer and prepares the BD table |
| 133 | * @hba: adapter instance |
| 134 | * @cmd: iscsi cmd struct pointer |
| 135 | * |
| 136 | * map SG list |
| 137 | */ |
| 138 | static int bnx2i_map_scsi_sg(struct bnx2i_hba *hba, struct bnx2i_cmd *cmd) |
| 139 | { |
| 140 | struct scsi_cmnd *sc = cmd->scsi_cmd; |
| 141 | struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; |
| 142 | struct scatterlist *sg; |
| 143 | int byte_count = 0; |
| 144 | int bd_count = 0; |
| 145 | int sg_count; |
| 146 | int sg_len; |
| 147 | u64 addr; |
| 148 | int i; |
| 149 | |
| 150 | BUG_ON(scsi_sg_count(sc) > ISCSI_MAX_BDS_PER_CMD); |
| 151 | |
| 152 | sg_count = scsi_dma_map(sc); |
| 153 | |
| 154 | scsi_for_each_sg(sc, sg, sg_count, i) { |
| 155 | sg_len = sg_dma_len(sg); |
| 156 | addr = (u64) sg_dma_address(sg); |
| 157 | bd[bd_count].buffer_addr_lo = addr & 0xffffffff; |
| 158 | bd[bd_count].buffer_addr_hi = addr >> 32; |
| 159 | bd[bd_count].buffer_length = sg_len; |
| 160 | bd[bd_count].flags = 0; |
| 161 | if (bd_count == 0) |
| 162 | bd[bd_count].flags = ISCSI_BD_FIRST_IN_BD_CHAIN; |
| 163 | |
| 164 | byte_count += sg_len; |
| 165 | bd_count++; |
| 166 | } |
| 167 | |
| 168 | if (bd_count) |
| 169 | bd[bd_count - 1].flags |= ISCSI_BD_LAST_IN_BD_CHAIN; |
| 170 | |
| 171 | BUG_ON(byte_count != scsi_bufflen(sc)); |
| 172 | return bd_count; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * bnx2i_iscsi_map_sg_list - maps SG list |
| 177 | * @cmd: iscsi cmd struct pointer |
| 178 | * |
| 179 | * creates BD list table for the command |
| 180 | */ |
| 181 | static void bnx2i_iscsi_map_sg_list(struct bnx2i_cmd *cmd) |
| 182 | { |
| 183 | int bd_count; |
| 184 | |
| 185 | bd_count = bnx2i_map_scsi_sg(cmd->conn->hba, cmd); |
| 186 | if (!bd_count) { |
| 187 | struct iscsi_bd *bd = cmd->io_tbl.bd_tbl; |
| 188 | |
| 189 | bd[0].buffer_addr_lo = bd[0].buffer_addr_hi = 0; |
| 190 | bd[0].buffer_length = bd[0].flags = 0; |
| 191 | } |
| 192 | cmd->io_tbl.bd_valid = bd_count; |
| 193 | } |
| 194 | |
| 195 | |
| 196 | /** |
| 197 | * bnx2i_iscsi_unmap_sg_list - unmaps SG list |
| 198 | * @cmd: iscsi cmd struct pointer |
| 199 | * |
| 200 | * unmap IO buffers and invalidate the BD table |
| 201 | */ |
| 202 | void bnx2i_iscsi_unmap_sg_list(struct bnx2i_cmd *cmd) |
| 203 | { |
| 204 | struct scsi_cmnd *sc = cmd->scsi_cmd; |
| 205 | |
| 206 | if (cmd->io_tbl.bd_valid && sc) { |
| 207 | scsi_dma_unmap(sc); |
| 208 | cmd->io_tbl.bd_valid = 0; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | static void bnx2i_setup_cmd_wqe_template(struct bnx2i_cmd *cmd) |
| 213 | { |
| 214 | memset(&cmd->req, 0x00, sizeof(cmd->req)); |
| 215 | cmd->req.op_code = 0xFF; |
| 216 | cmd->req.bd_list_addr_lo = (u32) cmd->io_tbl.bd_tbl_dma; |
| 217 | cmd->req.bd_list_addr_hi = |
| 218 | (u32) ((u64) cmd->io_tbl.bd_tbl_dma >> 32); |
| 219 | |
| 220 | } |
| 221 | |
| 222 | |
| 223 | /** |
| 224 | * bnx2i_bind_conn_to_iscsi_cid - bind conn structure to 'iscsi_cid' |
| 225 | * @hba: pointer to adapter instance |
| 226 | * @conn: pointer to iscsi connection |
| 227 | * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) |
| 228 | * |
| 229 | * update iscsi cid table entry with connection pointer. This enables |
| 230 | * driver to quickly get hold of connection structure pointer in |
| 231 | * completion/interrupt thread using iscsi context ID |
| 232 | */ |
| 233 | static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba, |
| 234 | struct bnx2i_conn *bnx2i_conn, |
| 235 | u32 iscsi_cid) |
| 236 | { |
| 237 | if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) { |
| 238 | iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, |
| 239 | "conn bind - entry #%d not free\n", iscsi_cid); |
| 240 | return -EBUSY; |
| 241 | } |
| 242 | |
| 243 | hba->cid_que.conn_cid_tbl[iscsi_cid] = bnx2i_conn; |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | |
| 248 | /** |
| 249 | * bnx2i_get_conn_from_id - maps an iscsi cid to corresponding conn ptr |
| 250 | * @hba: pointer to adapter instance |
| 251 | * @iscsi_cid: iscsi context ID, range 0 - (MAX_CONN - 1) |
| 252 | */ |
| 253 | struct bnx2i_conn *bnx2i_get_conn_from_id(struct bnx2i_hba *hba, |
| 254 | u16 iscsi_cid) |
| 255 | { |
| 256 | if (!hba->cid_que.conn_cid_tbl) { |
| 257 | printk(KERN_ERR "bnx2i: ERROR - missing conn<->cid table\n"); |
| 258 | return NULL; |
| 259 | |
| 260 | } else if (iscsi_cid >= hba->max_active_conns) { |
| 261 | printk(KERN_ERR "bnx2i: wrong cid #%d\n", iscsi_cid); |
| 262 | return NULL; |
| 263 | } |
| 264 | return hba->cid_que.conn_cid_tbl[iscsi_cid]; |
| 265 | } |
| 266 | |
| 267 | |
| 268 | /** |
| 269 | * bnx2i_alloc_iscsi_cid - allocates a iscsi_cid from free pool |
| 270 | * @hba: pointer to adapter instance |
| 271 | */ |
| 272 | static u32 bnx2i_alloc_iscsi_cid(struct bnx2i_hba *hba) |
| 273 | { |
| 274 | int idx; |
| 275 | |
| 276 | if (!hba->cid_que.cid_free_cnt) |
| 277 | return -1; |
| 278 | |
| 279 | idx = hba->cid_que.cid_q_cons_idx; |
| 280 | hba->cid_que.cid_q_cons_idx++; |
| 281 | if (hba->cid_que.cid_q_cons_idx == hba->cid_que.cid_q_max_idx) |
| 282 | hba->cid_que.cid_q_cons_idx = 0; |
| 283 | |
| 284 | hba->cid_que.cid_free_cnt--; |
| 285 | return hba->cid_que.cid_que[idx]; |
| 286 | } |
| 287 | |
| 288 | |
| 289 | /** |
| 290 | * bnx2i_free_iscsi_cid - returns tcp port to free list |
| 291 | * @hba: pointer to adapter instance |
| 292 | * @iscsi_cid: iscsi context ID to free |
| 293 | */ |
| 294 | static void bnx2i_free_iscsi_cid(struct bnx2i_hba *hba, u16 iscsi_cid) |
| 295 | { |
| 296 | int idx; |
| 297 | |
| 298 | if (iscsi_cid == (u16) -1) |
| 299 | return; |
| 300 | |
| 301 | hba->cid_que.cid_free_cnt++; |
| 302 | |
| 303 | idx = hba->cid_que.cid_q_prod_idx; |
| 304 | hba->cid_que.cid_que[idx] = iscsi_cid; |
| 305 | hba->cid_que.conn_cid_tbl[iscsi_cid] = NULL; |
| 306 | hba->cid_que.cid_q_prod_idx++; |
| 307 | if (hba->cid_que.cid_q_prod_idx == hba->cid_que.cid_q_max_idx) |
| 308 | hba->cid_que.cid_q_prod_idx = 0; |
| 309 | } |
| 310 | |
| 311 | |
| 312 | /** |
| 313 | * bnx2i_setup_free_cid_que - sets up free iscsi cid queue |
| 314 | * @hba: pointer to adapter instance |
| 315 | * |
| 316 | * allocates memory for iscsi cid queue & 'cid - conn ptr' mapping table, |
| 317 | * and initialize table attributes |
| 318 | */ |
| 319 | static int bnx2i_setup_free_cid_que(struct bnx2i_hba *hba) |
| 320 | { |
| 321 | int mem_size; |
| 322 | int i; |
| 323 | |
| 324 | mem_size = hba->max_active_conns * sizeof(u32); |
| 325 | mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; |
| 326 | |
| 327 | hba->cid_que.cid_que_base = kmalloc(mem_size, GFP_KERNEL); |
| 328 | if (!hba->cid_que.cid_que_base) |
| 329 | return -ENOMEM; |
| 330 | |
| 331 | mem_size = hba->max_active_conns * sizeof(struct bnx2i_conn *); |
| 332 | mem_size = (mem_size + (PAGE_SIZE - 1)) & PAGE_MASK; |
| 333 | hba->cid_que.conn_cid_tbl = kmalloc(mem_size, GFP_KERNEL); |
| 334 | if (!hba->cid_que.conn_cid_tbl) { |
| 335 | kfree(hba->cid_que.cid_que_base); |
| 336 | hba->cid_que.cid_que_base = NULL; |
| 337 | return -ENOMEM; |
| 338 | } |
| 339 | |
| 340 | hba->cid_que.cid_que = (u32 *)hba->cid_que.cid_que_base; |
| 341 | hba->cid_que.cid_q_prod_idx = 0; |
| 342 | hba->cid_que.cid_q_cons_idx = 0; |
| 343 | hba->cid_que.cid_q_max_idx = hba->max_active_conns; |
| 344 | hba->cid_que.cid_free_cnt = hba->max_active_conns; |
| 345 | |
| 346 | for (i = 0; i < hba->max_active_conns; i++) { |
| 347 | hba->cid_que.cid_que[i] = i; |
| 348 | hba->cid_que.conn_cid_tbl[i] = NULL; |
| 349 | } |
| 350 | return 0; |
| 351 | } |
| 352 | |
| 353 | |
| 354 | /** |
| 355 | * bnx2i_release_free_cid_que - releases 'iscsi_cid' queue resources |
| 356 | * @hba: pointer to adapter instance |
| 357 | */ |
| 358 | static void bnx2i_release_free_cid_que(struct bnx2i_hba *hba) |
| 359 | { |
| 360 | kfree(hba->cid_que.cid_que_base); |
| 361 | hba->cid_que.cid_que_base = NULL; |
| 362 | |
| 363 | kfree(hba->cid_que.conn_cid_tbl); |
| 364 | hba->cid_que.conn_cid_tbl = NULL; |
| 365 | } |
| 366 | |
| 367 | |
| 368 | /** |
| 369 | * bnx2i_alloc_ep - allocates ep structure from global pool |
| 370 | * @hba: pointer to adapter instance |
| 371 | * |
| 372 | * routine allocates a free endpoint structure from global pool and |
| 373 | * a tcp port to be used for this connection. Global resource lock, |
| 374 | * 'bnx2i_resc_lock' is held while accessing shared global data structures |
| 375 | */ |
| 376 | static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba) |
| 377 | { |
| 378 | struct iscsi_endpoint *ep; |
| 379 | struct bnx2i_endpoint *bnx2i_ep; |
| 380 | |
| 381 | ep = iscsi_create_endpoint(sizeof(*bnx2i_ep)); |
| 382 | if (!ep) { |
| 383 | printk(KERN_ERR "bnx2i: Could not allocate ep\n"); |
| 384 | return NULL; |
| 385 | } |
| 386 | |
| 387 | bnx2i_ep = ep->dd_data; |
| 388 | INIT_LIST_HEAD(&bnx2i_ep->link); |
| 389 | bnx2i_ep->state = EP_STATE_IDLE; |
| 390 | bnx2i_ep->hba = hba; |
| 391 | bnx2i_ep->hba_age = hba->age; |
| 392 | hba->ofld_conns_active++; |
| 393 | init_waitqueue_head(&bnx2i_ep->ofld_wait); |
| 394 | return ep; |
| 395 | } |
| 396 | |
| 397 | |
| 398 | /** |
| 399 | * bnx2i_free_ep - free endpoint |
| 400 | * @ep: pointer to iscsi endpoint structure |
| 401 | */ |
| 402 | static void bnx2i_free_ep(struct iscsi_endpoint *ep) |
| 403 | { |
| 404 | struct bnx2i_endpoint *bnx2i_ep = ep->dd_data; |
| 405 | unsigned long flags; |
| 406 | |
| 407 | spin_lock_irqsave(&bnx2i_resc_lock, flags); |
| 408 | bnx2i_ep->state = EP_STATE_IDLE; |
| 409 | bnx2i_ep->hba->ofld_conns_active--; |
| 410 | |
| 411 | bnx2i_free_iscsi_cid(bnx2i_ep->hba, bnx2i_ep->ep_iscsi_cid); |
| 412 | if (bnx2i_ep->conn) { |
| 413 | bnx2i_ep->conn->ep = NULL; |
| 414 | bnx2i_ep->conn = NULL; |
| 415 | } |
| 416 | |
| 417 | bnx2i_ep->hba = NULL; |
| 418 | spin_unlock_irqrestore(&bnx2i_resc_lock, flags); |
| 419 | iscsi_destroy_endpoint(ep); |
| 420 | } |
| 421 | |
| 422 | |
| 423 | /** |
| 424 | * bnx2i_alloc_bdt - allocates buffer descriptor (BD) table for the command |
| 425 | * @hba: adapter instance pointer |
| 426 | * @session: iscsi session pointer |
| 427 | * @cmd: iscsi command structure |
| 428 | */ |
| 429 | static int bnx2i_alloc_bdt(struct bnx2i_hba *hba, struct iscsi_session *session, |
| 430 | struct bnx2i_cmd *cmd) |
| 431 | { |
| 432 | struct io_bdt *io = &cmd->io_tbl; |
| 433 | struct iscsi_bd *bd; |
| 434 | |
| 435 | io->bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, |
| 436 | ISCSI_MAX_BDS_PER_CMD * sizeof(*bd), |
| 437 | &io->bd_tbl_dma, GFP_KERNEL); |
| 438 | if (!io->bd_tbl) { |
| 439 | iscsi_session_printk(KERN_ERR, session, "Could not " |
| 440 | "allocate bdt.\n"); |
| 441 | return -ENOMEM; |
| 442 | } |
| 443 | io->bd_valid = 0; |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | /** |
| 448 | * bnx2i_destroy_cmd_pool - destroys iscsi command pool and release BD table |
| 449 | * @hba: adapter instance pointer |
| 450 | * @session: iscsi session pointer |
| 451 | * @cmd: iscsi command structure |
| 452 | */ |
| 453 | static void bnx2i_destroy_cmd_pool(struct bnx2i_hba *hba, |
| 454 | struct iscsi_session *session) |
| 455 | { |
| 456 | int i; |
| 457 | |
| 458 | for (i = 0; i < session->cmds_max; i++) { |
| 459 | struct iscsi_task *task = session->cmds[i]; |
| 460 | struct bnx2i_cmd *cmd = task->dd_data; |
| 461 | |
| 462 | if (cmd->io_tbl.bd_tbl) |
| 463 | dma_free_coherent(&hba->pcidev->dev, |
| 464 | ISCSI_MAX_BDS_PER_CMD * |
| 465 | sizeof(struct iscsi_bd), |
| 466 | cmd->io_tbl.bd_tbl, |
| 467 | cmd->io_tbl.bd_tbl_dma); |
| 468 | } |
| 469 | |
| 470 | } |
| 471 | |
| 472 | |
| 473 | /** |
| 474 | * bnx2i_setup_cmd_pool - sets up iscsi command pool for the session |
| 475 | * @hba: adapter instance pointer |
| 476 | * @session: iscsi session pointer |
| 477 | */ |
| 478 | static int bnx2i_setup_cmd_pool(struct bnx2i_hba *hba, |
| 479 | struct iscsi_session *session) |
| 480 | { |
| 481 | int i; |
| 482 | |
| 483 | for (i = 0; i < session->cmds_max; i++) { |
| 484 | struct iscsi_task *task = session->cmds[i]; |
| 485 | struct bnx2i_cmd *cmd = task->dd_data; |
| 486 | |
| 487 | /* Anil */ |
| 488 | task->hdr = &cmd->hdr; |
| 489 | task->hdr_max = sizeof(struct iscsi_hdr); |
| 490 | |
| 491 | if (bnx2i_alloc_bdt(hba, session, cmd)) |
| 492 | goto free_bdts; |
| 493 | } |
| 494 | |
| 495 | return 0; |
| 496 | |
| 497 | free_bdts: |
| 498 | bnx2i_destroy_cmd_pool(hba, session); |
| 499 | return -ENOMEM; |
| 500 | } |
| 501 | |
| 502 | |
| 503 | /** |
| 504 | * bnx2i_setup_mp_bdt - allocate BD table resources |
| 505 | * @hba: pointer to adapter structure |
| 506 | * |
| 507 | * Allocate memory for dummy buffer and associated BD |
| 508 | * table to be used by middle path (MP) requests |
| 509 | */ |
| 510 | static int bnx2i_setup_mp_bdt(struct bnx2i_hba *hba) |
| 511 | { |
| 512 | int rc = 0; |
| 513 | struct iscsi_bd *mp_bdt; |
| 514 | u64 addr; |
| 515 | |
| 516 | hba->mp_bd_tbl = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 517 | &hba->mp_bd_dma, GFP_KERNEL); |
| 518 | if (!hba->mp_bd_tbl) { |
| 519 | printk(KERN_ERR "unable to allocate Middle Path BDT\n"); |
| 520 | rc = -1; |
| 521 | goto out; |
| 522 | } |
| 523 | |
| 524 | hba->dummy_buffer = dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 525 | &hba->dummy_buf_dma, GFP_KERNEL); |
| 526 | if (!hba->dummy_buffer) { |
| 527 | printk(KERN_ERR "unable to alloc Middle Path Dummy Buffer\n"); |
| 528 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 529 | hba->mp_bd_tbl, hba->mp_bd_dma); |
| 530 | hba->mp_bd_tbl = NULL; |
| 531 | rc = -1; |
| 532 | goto out; |
| 533 | } |
| 534 | |
| 535 | mp_bdt = (struct iscsi_bd *) hba->mp_bd_tbl; |
| 536 | addr = (unsigned long) hba->dummy_buf_dma; |
| 537 | mp_bdt->buffer_addr_lo = addr & 0xffffffff; |
| 538 | mp_bdt->buffer_addr_hi = addr >> 32; |
| 539 | mp_bdt->buffer_length = PAGE_SIZE; |
| 540 | mp_bdt->flags = ISCSI_BD_LAST_IN_BD_CHAIN | |
| 541 | ISCSI_BD_FIRST_IN_BD_CHAIN; |
| 542 | out: |
| 543 | return rc; |
| 544 | } |
| 545 | |
| 546 | |
| 547 | /** |
| 548 | * bnx2i_free_mp_bdt - releases ITT back to free pool |
| 549 | * @hba: pointer to adapter instance |
| 550 | * |
| 551 | * free MP dummy buffer and associated BD table |
| 552 | */ |
| 553 | static void bnx2i_free_mp_bdt(struct bnx2i_hba *hba) |
| 554 | { |
| 555 | if (hba->mp_bd_tbl) { |
| 556 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 557 | hba->mp_bd_tbl, hba->mp_bd_dma); |
| 558 | hba->mp_bd_tbl = NULL; |
| 559 | } |
| 560 | if (hba->dummy_buffer) { |
| 561 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 562 | hba->dummy_buffer, hba->dummy_buf_dma); |
| 563 | hba->dummy_buffer = NULL; |
| 564 | } |
| 565 | return; |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * bnx2i_drop_session - notifies iscsid of connection error. |
| 570 | * @hba: adapter instance pointer |
| 571 | * @session: iscsi session pointer |
| 572 | * |
| 573 | * This notifies iscsid that there is a error, so it can initiate |
| 574 | * recovery. |
| 575 | * |
| 576 | * This relies on caller using the iscsi class iterator so the object |
| 577 | * is refcounted and does not disapper from under us. |
| 578 | */ |
| 579 | void bnx2i_drop_session(struct iscsi_cls_session *cls_session) |
| 580 | { |
| 581 | iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED); |
| 582 | } |
| 583 | |
| 584 | /** |
| 585 | * bnx2i_ep_destroy_list_add - add an entry to EP destroy list |
| 586 | * @hba: pointer to adapter instance |
| 587 | * @ep: pointer to endpoint (transport indentifier) structure |
| 588 | * |
| 589 | * EP destroy queue manager |
| 590 | */ |
| 591 | static int bnx2i_ep_destroy_list_add(struct bnx2i_hba *hba, |
| 592 | struct bnx2i_endpoint *ep) |
| 593 | { |
| 594 | write_lock_bh(&hba->ep_rdwr_lock); |
| 595 | list_add_tail(&ep->link, &hba->ep_destroy_list); |
| 596 | write_unlock_bh(&hba->ep_rdwr_lock); |
| 597 | return 0; |
| 598 | } |
| 599 | |
| 600 | /** |
| 601 | * bnx2i_ep_destroy_list_del - add an entry to EP destroy list |
| 602 | * |
| 603 | * @hba: pointer to adapter instance |
| 604 | * @ep: pointer to endpoint (transport indentifier) structure |
| 605 | * |
| 606 | * EP destroy queue manager |
| 607 | */ |
| 608 | static int bnx2i_ep_destroy_list_del(struct bnx2i_hba *hba, |
| 609 | struct bnx2i_endpoint *ep) |
| 610 | { |
| 611 | write_lock_bh(&hba->ep_rdwr_lock); |
| 612 | list_del_init(&ep->link); |
| 613 | write_unlock_bh(&hba->ep_rdwr_lock); |
| 614 | |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | /** |
| 619 | * bnx2i_ep_ofld_list_add - add an entry to ep offload pending list |
| 620 | * @hba: pointer to adapter instance |
| 621 | * @ep: pointer to endpoint (transport indentifier) structure |
| 622 | * |
| 623 | * pending conn offload completion queue manager |
| 624 | */ |
| 625 | static int bnx2i_ep_ofld_list_add(struct bnx2i_hba *hba, |
| 626 | struct bnx2i_endpoint *ep) |
| 627 | { |
| 628 | write_lock_bh(&hba->ep_rdwr_lock); |
| 629 | list_add_tail(&ep->link, &hba->ep_ofld_list); |
| 630 | write_unlock_bh(&hba->ep_rdwr_lock); |
| 631 | return 0; |
| 632 | } |
| 633 | |
| 634 | /** |
| 635 | * bnx2i_ep_ofld_list_del - add an entry to ep offload pending list |
| 636 | * @hba: pointer to adapter instance |
| 637 | * @ep: pointer to endpoint (transport indentifier) structure |
| 638 | * |
| 639 | * pending conn offload completion queue manager |
| 640 | */ |
| 641 | static int bnx2i_ep_ofld_list_del(struct bnx2i_hba *hba, |
| 642 | struct bnx2i_endpoint *ep) |
| 643 | { |
| 644 | write_lock_bh(&hba->ep_rdwr_lock); |
| 645 | list_del_init(&ep->link); |
| 646 | write_unlock_bh(&hba->ep_rdwr_lock); |
| 647 | return 0; |
| 648 | } |
| 649 | |
| 650 | |
| 651 | /** |
| 652 | * bnx2i_find_ep_in_ofld_list - find iscsi_cid in pending list of endpoints |
| 653 | * |
| 654 | * @hba: pointer to adapter instance |
| 655 | * @iscsi_cid: iscsi context ID to find |
| 656 | * |
| 657 | */ |
| 658 | struct bnx2i_endpoint * |
| 659 | bnx2i_find_ep_in_ofld_list(struct bnx2i_hba *hba, u32 iscsi_cid) |
| 660 | { |
| 661 | struct list_head *list; |
| 662 | struct list_head *tmp; |
| 663 | struct bnx2i_endpoint *ep; |
| 664 | |
| 665 | read_lock_bh(&hba->ep_rdwr_lock); |
| 666 | list_for_each_safe(list, tmp, &hba->ep_ofld_list) { |
| 667 | ep = (struct bnx2i_endpoint *)list; |
| 668 | |
| 669 | if (ep->ep_iscsi_cid == iscsi_cid) |
| 670 | break; |
| 671 | ep = NULL; |
| 672 | } |
| 673 | read_unlock_bh(&hba->ep_rdwr_lock); |
| 674 | |
| 675 | if (!ep) |
| 676 | printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); |
| 677 | return ep; |
| 678 | } |
| 679 | |
| 680 | |
| 681 | /** |
| 682 | * bnx2i_find_ep_in_destroy_list - find iscsi_cid in destroy list |
| 683 | * @hba: pointer to adapter instance |
| 684 | * @iscsi_cid: iscsi context ID to find |
| 685 | * |
| 686 | */ |
| 687 | struct bnx2i_endpoint * |
| 688 | bnx2i_find_ep_in_destroy_list(struct bnx2i_hba *hba, u32 iscsi_cid) |
| 689 | { |
| 690 | struct list_head *list; |
| 691 | struct list_head *tmp; |
| 692 | struct bnx2i_endpoint *ep; |
| 693 | |
| 694 | read_lock_bh(&hba->ep_rdwr_lock); |
| 695 | list_for_each_safe(list, tmp, &hba->ep_destroy_list) { |
| 696 | ep = (struct bnx2i_endpoint *)list; |
| 697 | |
| 698 | if (ep->ep_iscsi_cid == iscsi_cid) |
| 699 | break; |
| 700 | ep = NULL; |
| 701 | } |
| 702 | read_unlock_bh(&hba->ep_rdwr_lock); |
| 703 | |
| 704 | if (!ep) |
| 705 | printk(KERN_ERR "l5 cid %d not found\n", iscsi_cid); |
| 706 | |
| 707 | return ep; |
| 708 | } |
| 709 | |
| 710 | /** |
| 711 | * bnx2i_setup_host_queue_size - assigns shost->can_queue param |
| 712 | * @hba: pointer to adapter instance |
| 713 | * @shost: scsi host pointer |
| 714 | * |
| 715 | * Initializes 'can_queue' parameter based on how many outstanding commands |
| 716 | * the device can handle. Each device 5708/5709/57710 has different |
| 717 | * capabilities |
| 718 | */ |
| 719 | static void bnx2i_setup_host_queue_size(struct bnx2i_hba *hba, |
| 720 | struct Scsi_Host *shost) |
| 721 | { |
| 722 | if (test_bit(BNX2I_NX2_DEV_5708, &hba->cnic_dev_type)) |
| 723 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; |
| 724 | else if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) |
| 725 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5709; |
| 726 | else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) |
| 727 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_57710; |
| 728 | else |
| 729 | shost->can_queue = ISCSI_MAX_CMDS_PER_HBA_5708; |
| 730 | } |
| 731 | |
| 732 | |
| 733 | /** |
| 734 | * bnx2i_alloc_hba - allocate and init adapter instance |
| 735 | * @cnic: cnic device pointer |
| 736 | * |
| 737 | * allocate & initialize adapter structure and call other |
| 738 | * support routines to do per adapter initialization |
| 739 | */ |
| 740 | struct bnx2i_hba *bnx2i_alloc_hba(struct cnic_dev *cnic) |
| 741 | { |
| 742 | struct Scsi_Host *shost; |
| 743 | struct bnx2i_hba *hba; |
| 744 | |
| 745 | shost = iscsi_host_alloc(&bnx2i_host_template, sizeof(*hba), 0); |
| 746 | if (!shost) |
| 747 | return NULL; |
| 748 | shost->dma_boundary = cnic->pcidev->dma_mask; |
| 749 | shost->transportt = bnx2i_scsi_xport_template; |
| 750 | shost->max_id = ISCSI_MAX_CONNS_PER_HBA; |
| 751 | shost->max_channel = 0; |
| 752 | shost->max_lun = 512; |
| 753 | shost->max_cmd_len = 16; |
| 754 | |
| 755 | hba = iscsi_host_priv(shost); |
| 756 | hba->shost = shost; |
| 757 | hba->netdev = cnic->netdev; |
| 758 | /* Get PCI related information and update hba struct members */ |
| 759 | hba->pcidev = cnic->pcidev; |
| 760 | pci_dev_get(hba->pcidev); |
| 761 | hba->pci_did = hba->pcidev->device; |
| 762 | hba->pci_vid = hba->pcidev->vendor; |
| 763 | hba->pci_sdid = hba->pcidev->subsystem_device; |
| 764 | hba->pci_svid = hba->pcidev->subsystem_vendor; |
| 765 | hba->pci_func = PCI_FUNC(hba->pcidev->devfn); |
| 766 | hba->pci_devno = PCI_SLOT(hba->pcidev->devfn); |
| 767 | bnx2i_identify_device(hba); |
| 768 | |
| 769 | bnx2i_identify_device(hba); |
| 770 | bnx2i_setup_host_queue_size(hba, shost); |
| 771 | |
| 772 | if (test_bit(BNX2I_NX2_DEV_5709, &hba->cnic_dev_type)) { |
| 773 | hba->regview = ioremap_nocache(hba->netdev->base_addr, |
| 774 | BNX2_MQ_CONFIG2); |
| 775 | if (!hba->regview) |
| 776 | goto ioreg_map_err; |
| 777 | } else if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { |
| 778 | hba->regview = ioremap_nocache(hba->netdev->base_addr, 4096); |
| 779 | if (!hba->regview) |
| 780 | goto ioreg_map_err; |
| 781 | } |
| 782 | |
| 783 | if (bnx2i_setup_mp_bdt(hba)) |
| 784 | goto mp_bdt_mem_err; |
| 785 | |
| 786 | INIT_LIST_HEAD(&hba->ep_ofld_list); |
| 787 | INIT_LIST_HEAD(&hba->ep_destroy_list); |
| 788 | rwlock_init(&hba->ep_rdwr_lock); |
| 789 | |
| 790 | hba->mtu_supported = BNX2I_MAX_MTU_SUPPORTED; |
| 791 | |
| 792 | /* different values for 5708/5709/57710 */ |
| 793 | hba->max_active_conns = ISCSI_MAX_CONNS_PER_HBA; |
| 794 | |
| 795 | if (bnx2i_setup_free_cid_que(hba)) |
| 796 | goto cid_que_err; |
| 797 | |
| 798 | /* SQ/RQ/CQ size can be changed via sysfx interface */ |
| 799 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { |
| 800 | if (sq_size && sq_size <= BNX2I_5770X_SQ_WQES_MAX) |
| 801 | hba->max_sqes = sq_size; |
| 802 | else |
| 803 | hba->max_sqes = BNX2I_5770X_SQ_WQES_DEFAULT; |
| 804 | } else { /* 5706/5708/5709 */ |
| 805 | if (sq_size && sq_size <= BNX2I_570X_SQ_WQES_MAX) |
| 806 | hba->max_sqes = sq_size; |
| 807 | else |
| 808 | hba->max_sqes = BNX2I_570X_SQ_WQES_DEFAULT; |
| 809 | } |
| 810 | |
| 811 | hba->max_rqes = rq_size; |
| 812 | hba->max_cqes = hba->max_sqes + rq_size; |
| 813 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type)) { |
| 814 | if (hba->max_cqes > BNX2I_5770X_CQ_WQES_MAX) |
| 815 | hba->max_cqes = BNX2I_5770X_CQ_WQES_MAX; |
| 816 | } else if (hba->max_cqes > BNX2I_570X_CQ_WQES_MAX) |
| 817 | hba->max_cqes = BNX2I_570X_CQ_WQES_MAX; |
| 818 | |
| 819 | hba->num_ccell = hba->max_sqes / 2; |
| 820 | |
| 821 | spin_lock_init(&hba->lock); |
| 822 | mutex_init(&hba->net_dev_lock); |
| 823 | |
| 824 | if (iscsi_host_add(shost, &hba->pcidev->dev)) |
| 825 | goto free_dump_mem; |
| 826 | return hba; |
| 827 | |
| 828 | free_dump_mem: |
| 829 | bnx2i_release_free_cid_que(hba); |
| 830 | cid_que_err: |
| 831 | bnx2i_free_mp_bdt(hba); |
| 832 | mp_bdt_mem_err: |
| 833 | if (hba->regview) { |
| 834 | iounmap(hba->regview); |
| 835 | hba->regview = NULL; |
| 836 | } |
| 837 | ioreg_map_err: |
| 838 | pci_dev_put(hba->pcidev); |
| 839 | scsi_host_put(shost); |
| 840 | return NULL; |
| 841 | } |
| 842 | |
| 843 | /** |
| 844 | * bnx2i_free_hba- releases hba structure and resources held by the adapter |
| 845 | * @hba: pointer to adapter instance |
| 846 | * |
| 847 | * free adapter structure and call various cleanup routines. |
| 848 | */ |
| 849 | void bnx2i_free_hba(struct bnx2i_hba *hba) |
| 850 | { |
| 851 | struct Scsi_Host *shost = hba->shost; |
| 852 | |
| 853 | iscsi_host_remove(shost); |
| 854 | INIT_LIST_HEAD(&hba->ep_ofld_list); |
| 855 | INIT_LIST_HEAD(&hba->ep_destroy_list); |
| 856 | pci_dev_put(hba->pcidev); |
| 857 | |
| 858 | if (hba->regview) { |
| 859 | iounmap(hba->regview); |
| 860 | hba->regview = NULL; |
| 861 | } |
| 862 | bnx2i_free_mp_bdt(hba); |
| 863 | bnx2i_release_free_cid_que(hba); |
| 864 | iscsi_host_free(shost); |
| 865 | } |
| 866 | |
| 867 | /** |
| 868 | * bnx2i_conn_free_login_resources - free DMA resources used for login process |
| 869 | * @hba: pointer to adapter instance |
| 870 | * @bnx2i_conn: iscsi connection pointer |
| 871 | * |
| 872 | * Login related resources, mostly BDT & payload DMA memory is freed |
| 873 | */ |
| 874 | static void bnx2i_conn_free_login_resources(struct bnx2i_hba *hba, |
| 875 | struct bnx2i_conn *bnx2i_conn) |
| 876 | { |
| 877 | if (bnx2i_conn->gen_pdu.resp_bd_tbl) { |
| 878 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 879 | bnx2i_conn->gen_pdu.resp_bd_tbl, |
| 880 | bnx2i_conn->gen_pdu.resp_bd_dma); |
| 881 | bnx2i_conn->gen_pdu.resp_bd_tbl = NULL; |
| 882 | } |
| 883 | |
| 884 | if (bnx2i_conn->gen_pdu.req_bd_tbl) { |
| 885 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 886 | bnx2i_conn->gen_pdu.req_bd_tbl, |
| 887 | bnx2i_conn->gen_pdu.req_bd_dma); |
| 888 | bnx2i_conn->gen_pdu.req_bd_tbl = NULL; |
| 889 | } |
| 890 | |
| 891 | if (bnx2i_conn->gen_pdu.resp_buf) { |
| 892 | dma_free_coherent(&hba->pcidev->dev, |
| 893 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
| 894 | bnx2i_conn->gen_pdu.resp_buf, |
| 895 | bnx2i_conn->gen_pdu.resp_dma_addr); |
| 896 | bnx2i_conn->gen_pdu.resp_buf = NULL; |
| 897 | } |
| 898 | |
| 899 | if (bnx2i_conn->gen_pdu.req_buf) { |
| 900 | dma_free_coherent(&hba->pcidev->dev, |
| 901 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
| 902 | bnx2i_conn->gen_pdu.req_buf, |
| 903 | bnx2i_conn->gen_pdu.req_dma_addr); |
| 904 | bnx2i_conn->gen_pdu.req_buf = NULL; |
| 905 | } |
| 906 | } |
| 907 | |
| 908 | /** |
| 909 | * bnx2i_conn_alloc_login_resources - alloc DMA resources for login/nop. |
| 910 | * @hba: pointer to adapter instance |
| 911 | * @bnx2i_conn: iscsi connection pointer |
| 912 | * |
| 913 | * Mgmt task DNA resources are allocated in this routine. |
| 914 | */ |
| 915 | static int bnx2i_conn_alloc_login_resources(struct bnx2i_hba *hba, |
| 916 | struct bnx2i_conn *bnx2i_conn) |
| 917 | { |
| 918 | /* Allocate memory for login request/response buffers */ |
| 919 | bnx2i_conn->gen_pdu.req_buf = |
| 920 | dma_alloc_coherent(&hba->pcidev->dev, |
| 921 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
| 922 | &bnx2i_conn->gen_pdu.req_dma_addr, |
| 923 | GFP_KERNEL); |
| 924 | if (bnx2i_conn->gen_pdu.req_buf == NULL) |
| 925 | goto login_req_buf_failure; |
| 926 | |
| 927 | bnx2i_conn->gen_pdu.req_buf_size = 0; |
| 928 | bnx2i_conn->gen_pdu.req_wr_ptr = bnx2i_conn->gen_pdu.req_buf; |
| 929 | |
| 930 | bnx2i_conn->gen_pdu.resp_buf = |
| 931 | dma_alloc_coherent(&hba->pcidev->dev, |
| 932 | ISCSI_DEF_MAX_RECV_SEG_LEN, |
| 933 | &bnx2i_conn->gen_pdu.resp_dma_addr, |
| 934 | GFP_KERNEL); |
| 935 | if (bnx2i_conn->gen_pdu.resp_buf == NULL) |
| 936 | goto login_resp_buf_failure; |
| 937 | |
| 938 | bnx2i_conn->gen_pdu.resp_buf_size = ISCSI_DEF_MAX_RECV_SEG_LEN; |
| 939 | bnx2i_conn->gen_pdu.resp_wr_ptr = bnx2i_conn->gen_pdu.resp_buf; |
| 940 | |
| 941 | bnx2i_conn->gen_pdu.req_bd_tbl = |
| 942 | dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 943 | &bnx2i_conn->gen_pdu.req_bd_dma, GFP_KERNEL); |
| 944 | if (bnx2i_conn->gen_pdu.req_bd_tbl == NULL) |
| 945 | goto login_req_bd_tbl_failure; |
| 946 | |
| 947 | bnx2i_conn->gen_pdu.resp_bd_tbl = |
| 948 | dma_alloc_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 949 | &bnx2i_conn->gen_pdu.resp_bd_dma, |
| 950 | GFP_KERNEL); |
| 951 | if (bnx2i_conn->gen_pdu.resp_bd_tbl == NULL) |
| 952 | goto login_resp_bd_tbl_failure; |
| 953 | |
| 954 | return 0; |
| 955 | |
| 956 | login_resp_bd_tbl_failure: |
| 957 | dma_free_coherent(&hba->pcidev->dev, PAGE_SIZE, |
| 958 | bnx2i_conn->gen_pdu.req_bd_tbl, |
| 959 | bnx2i_conn->gen_pdu.req_bd_dma); |
| 960 | bnx2i_conn->gen_pdu.req_bd_tbl = NULL; |
| 961 | |
| 962 | login_req_bd_tbl_failure: |
| 963 | dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, |
| 964 | bnx2i_conn->gen_pdu.resp_buf, |
| 965 | bnx2i_conn->gen_pdu.resp_dma_addr); |
| 966 | bnx2i_conn->gen_pdu.resp_buf = NULL; |
| 967 | login_resp_buf_failure: |
| 968 | dma_free_coherent(&hba->pcidev->dev, ISCSI_DEF_MAX_RECV_SEG_LEN, |
| 969 | bnx2i_conn->gen_pdu.req_buf, |
| 970 | bnx2i_conn->gen_pdu.req_dma_addr); |
| 971 | bnx2i_conn->gen_pdu.req_buf = NULL; |
| 972 | login_req_buf_failure: |
| 973 | iscsi_conn_printk(KERN_ERR, bnx2i_conn->cls_conn->dd_data, |
| 974 | "login resource alloc failed!!\n"); |
| 975 | return -ENOMEM; |
| 976 | |
| 977 | } |
| 978 | |
| 979 | |
| 980 | /** |
| 981 | * bnx2i_iscsi_prep_generic_pdu_bd - prepares BD table. |
| 982 | * @bnx2i_conn: iscsi connection pointer |
| 983 | * |
| 984 | * Allocates buffers and BD tables before shipping requests to cnic |
| 985 | * for PDUs prepared by 'iscsid' daemon |
| 986 | */ |
| 987 | static void bnx2i_iscsi_prep_generic_pdu_bd(struct bnx2i_conn *bnx2i_conn) |
| 988 | { |
| 989 | struct iscsi_bd *bd_tbl; |
| 990 | |
| 991 | bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.req_bd_tbl; |
| 992 | |
| 993 | bd_tbl->buffer_addr_hi = |
| 994 | (u32) ((u64) bnx2i_conn->gen_pdu.req_dma_addr >> 32); |
| 995 | bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.req_dma_addr; |
| 996 | bd_tbl->buffer_length = bnx2i_conn->gen_pdu.req_wr_ptr - |
| 997 | bnx2i_conn->gen_pdu.req_buf; |
| 998 | bd_tbl->reserved0 = 0; |
| 999 | bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | |
| 1000 | ISCSI_BD_FIRST_IN_BD_CHAIN; |
| 1001 | |
| 1002 | bd_tbl = (struct iscsi_bd *) bnx2i_conn->gen_pdu.resp_bd_tbl; |
| 1003 | bd_tbl->buffer_addr_hi = (u64) bnx2i_conn->gen_pdu.resp_dma_addr >> 32; |
| 1004 | bd_tbl->buffer_addr_lo = (u32) bnx2i_conn->gen_pdu.resp_dma_addr; |
| 1005 | bd_tbl->buffer_length = ISCSI_DEF_MAX_RECV_SEG_LEN; |
| 1006 | bd_tbl->reserved0 = 0; |
| 1007 | bd_tbl->flags = ISCSI_BD_LAST_IN_BD_CHAIN | |
| 1008 | ISCSI_BD_FIRST_IN_BD_CHAIN; |
| 1009 | } |
| 1010 | |
| 1011 | |
| 1012 | /** |
| 1013 | * bnx2i_iscsi_send_generic_request - called to send mgmt tasks. |
| 1014 | * @task: transport layer task pointer |
| 1015 | * |
| 1016 | * called to transmit PDUs prepared by the 'iscsid' daemon. iSCSI login, |
| 1017 | * Nop-out and Logout requests flow through this path. |
| 1018 | */ |
| 1019 | static int bnx2i_iscsi_send_generic_request(struct iscsi_task *task) |
| 1020 | { |
| 1021 | struct bnx2i_cmd *cmd = task->dd_data; |
| 1022 | struct bnx2i_conn *bnx2i_conn = cmd->conn; |
| 1023 | int rc = 0; |
| 1024 | char *buf; |
| 1025 | int data_len; |
| 1026 | |
| 1027 | bnx2i_iscsi_prep_generic_pdu_bd(bnx2i_conn); |
| 1028 | switch (task->hdr->opcode & ISCSI_OPCODE_MASK) { |
| 1029 | case ISCSI_OP_LOGIN: |
| 1030 | bnx2i_send_iscsi_login(bnx2i_conn, task); |
| 1031 | break; |
| 1032 | case ISCSI_OP_NOOP_OUT: |
| 1033 | data_len = bnx2i_conn->gen_pdu.req_buf_size; |
| 1034 | buf = bnx2i_conn->gen_pdu.req_buf; |
| 1035 | if (data_len) |
| 1036 | rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, |
| 1037 | RESERVED_ITT, |
| 1038 | buf, data_len, 1); |
| 1039 | else |
| 1040 | rc = bnx2i_send_iscsi_nopout(bnx2i_conn, task, |
| 1041 | RESERVED_ITT, |
| 1042 | NULL, 0, 1); |
| 1043 | break; |
| 1044 | case ISCSI_OP_LOGOUT: |
| 1045 | rc = bnx2i_send_iscsi_logout(bnx2i_conn, task); |
| 1046 | break; |
| 1047 | case ISCSI_OP_SCSI_TMFUNC: |
| 1048 | rc = bnx2i_send_iscsi_tmf(bnx2i_conn, task); |
| 1049 | break; |
| 1050 | default: |
| 1051 | iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data, |
| 1052 | "send_gen: unsupported op 0x%x\n", |
| 1053 | task->hdr->opcode); |
| 1054 | } |
| 1055 | return rc; |
| 1056 | } |
| 1057 | |
| 1058 | |
| 1059 | /********************************************************************** |
| 1060 | * SCSI-ML Interface |
| 1061 | **********************************************************************/ |
| 1062 | |
| 1063 | /** |
| 1064 | * bnx2i_cpy_scsi_cdb - copies LUN & CDB fields in required format to sq wqe |
| 1065 | * @sc: SCSI-ML command pointer |
| 1066 | * @cmd: iscsi cmd pointer |
| 1067 | */ |
| 1068 | static void bnx2i_cpy_scsi_cdb(struct scsi_cmnd *sc, struct bnx2i_cmd *cmd) |
| 1069 | { |
| 1070 | u32 dword; |
| 1071 | int lpcnt; |
| 1072 | u8 *srcp; |
| 1073 | u32 *dstp; |
| 1074 | u32 scsi_lun[2]; |
| 1075 | |
| 1076 | int_to_scsilun(sc->device->lun, (struct scsi_lun *) scsi_lun); |
| 1077 | cmd->req.lun[0] = be32_to_cpu(scsi_lun[0]); |
| 1078 | cmd->req.lun[1] = be32_to_cpu(scsi_lun[1]); |
| 1079 | |
| 1080 | lpcnt = cmd->scsi_cmd->cmd_len / sizeof(dword); |
| 1081 | srcp = (u8 *) sc->cmnd; |
| 1082 | dstp = (u32 *) cmd->req.cdb; |
| 1083 | while (lpcnt--) { |
| 1084 | memcpy(&dword, (const void *) srcp, 4); |
| 1085 | *dstp = cpu_to_be32(dword); |
| 1086 | srcp += 4; |
| 1087 | dstp++; |
| 1088 | } |
| 1089 | if (sc->cmd_len & 0x3) { |
| 1090 | dword = (u32) srcp[0] | ((u32) srcp[1] << 8); |
| 1091 | *dstp = cpu_to_be32(dword); |
| 1092 | } |
| 1093 | } |
| 1094 | |
| 1095 | static void bnx2i_cleanup_task(struct iscsi_task *task) |
| 1096 | { |
| 1097 | struct iscsi_conn *conn = task->conn; |
| 1098 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
| 1099 | struct bnx2i_hba *hba = bnx2i_conn->hba; |
| 1100 | |
| 1101 | /* |
| 1102 | * mgmt task or cmd was never sent to us to transmit. |
| 1103 | */ |
| 1104 | if (!task->sc || task->state == ISCSI_TASK_PENDING) |
| 1105 | return; |
| 1106 | /* |
| 1107 | * need to clean-up task context to claim dma buffers |
| 1108 | */ |
| 1109 | if (task->state == ISCSI_TASK_ABRT_TMF) { |
| 1110 | bnx2i_send_cmd_cleanup_req(hba, task->dd_data); |
| 1111 | |
| 1112 | spin_unlock_bh(&conn->session->lock); |
| 1113 | wait_for_completion_timeout(&bnx2i_conn->cmd_cleanup_cmpl, |
| 1114 | msecs_to_jiffies(ISCSI_CMD_CLEANUP_TIMEOUT)); |
| 1115 | spin_lock_bh(&conn->session->lock); |
| 1116 | } |
| 1117 | bnx2i_iscsi_unmap_sg_list(task->dd_data); |
| 1118 | } |
| 1119 | |
| 1120 | /** |
| 1121 | * bnx2i_mtask_xmit - transmit mtask to chip for further processing |
| 1122 | * @conn: transport layer conn structure pointer |
| 1123 | * @task: transport layer command structure pointer |
| 1124 | */ |
| 1125 | static int |
| 1126 | bnx2i_mtask_xmit(struct iscsi_conn *conn, struct iscsi_task *task) |
| 1127 | { |
| 1128 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
| 1129 | struct bnx2i_cmd *cmd = task->dd_data; |
| 1130 | |
| 1131 | memset(bnx2i_conn->gen_pdu.req_buf, 0, ISCSI_DEF_MAX_RECV_SEG_LEN); |
| 1132 | |
| 1133 | bnx2i_setup_cmd_wqe_template(cmd); |
| 1134 | bnx2i_conn->gen_pdu.req_buf_size = task->data_count; |
| 1135 | if (task->data_count) { |
| 1136 | memcpy(bnx2i_conn->gen_pdu.req_buf, task->data, |
| 1137 | task->data_count); |
| 1138 | bnx2i_conn->gen_pdu.req_wr_ptr = |
| 1139 | bnx2i_conn->gen_pdu.req_buf + task->data_count; |
| 1140 | } |
| 1141 | cmd->conn = conn->dd_data; |
| 1142 | cmd->scsi_cmd = NULL; |
| 1143 | return bnx2i_iscsi_send_generic_request(task); |
| 1144 | } |
| 1145 | |
| 1146 | /** |
| 1147 | * bnx2i_task_xmit - transmit iscsi command to chip for further processing |
| 1148 | * @task: transport layer command structure pointer |
| 1149 | * |
| 1150 | * maps SG buffers and send request to chip/firmware in the form of SQ WQE |
| 1151 | */ |
| 1152 | static int bnx2i_task_xmit(struct iscsi_task *task) |
| 1153 | { |
| 1154 | struct iscsi_conn *conn = task->conn; |
| 1155 | struct iscsi_session *session = conn->session; |
| 1156 | struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session); |
| 1157 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
| 1158 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
| 1159 | struct scsi_cmnd *sc = task->sc; |
| 1160 | struct bnx2i_cmd *cmd = task->dd_data; |
| 1161 | struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr; |
| 1162 | |
| 1163 | if (test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state)) |
| 1164 | return -ENOTCONN; |
| 1165 | |
| 1166 | if (!bnx2i_conn->is_bound) |
| 1167 | return -ENOTCONN; |
| 1168 | |
| 1169 | /* |
| 1170 | * If there is no scsi_cmnd this must be a mgmt task |
| 1171 | */ |
| 1172 | if (!sc) |
| 1173 | return bnx2i_mtask_xmit(conn, task); |
| 1174 | |
| 1175 | bnx2i_setup_cmd_wqe_template(cmd); |
| 1176 | cmd->req.op_code = ISCSI_OP_SCSI_CMD; |
| 1177 | cmd->conn = bnx2i_conn; |
| 1178 | cmd->scsi_cmd = sc; |
| 1179 | cmd->req.total_data_transfer_length = scsi_bufflen(sc); |
| 1180 | cmd->req.cmd_sn = be32_to_cpu(hdr->cmdsn); |
| 1181 | |
| 1182 | bnx2i_iscsi_map_sg_list(cmd); |
| 1183 | bnx2i_cpy_scsi_cdb(sc, cmd); |
| 1184 | |
| 1185 | cmd->req.op_attr = ISCSI_ATTR_SIMPLE; |
| 1186 | if (sc->sc_data_direction == DMA_TO_DEVICE) { |
| 1187 | cmd->req.op_attr |= ISCSI_CMD_REQUEST_WRITE; |
| 1188 | cmd->req.itt = task->itt | |
| 1189 | (ISCSI_TASK_TYPE_WRITE << ISCSI_CMD_REQUEST_TYPE_SHIFT); |
| 1190 | bnx2i_setup_write_cmd_bd_info(task); |
| 1191 | } else { |
| 1192 | if (scsi_bufflen(sc)) |
| 1193 | cmd->req.op_attr |= ISCSI_CMD_REQUEST_READ; |
| 1194 | cmd->req.itt = task->itt | |
| 1195 | (ISCSI_TASK_TYPE_READ << ISCSI_CMD_REQUEST_TYPE_SHIFT); |
| 1196 | } |
| 1197 | |
| 1198 | cmd->req.num_bds = cmd->io_tbl.bd_valid; |
| 1199 | if (!cmd->io_tbl.bd_valid) { |
| 1200 | cmd->req.bd_list_addr_lo = (u32) hba->mp_bd_dma; |
| 1201 | cmd->req.bd_list_addr_hi = (u32) ((u64) hba->mp_bd_dma >> 32); |
| 1202 | cmd->req.num_bds = 1; |
| 1203 | } |
| 1204 | |
| 1205 | bnx2i_send_iscsi_scsicmd(bnx2i_conn, cmd); |
| 1206 | return 0; |
| 1207 | } |
| 1208 | |
| 1209 | /** |
| 1210 | * bnx2i_session_create - create a new iscsi session |
| 1211 | * @cmds_max: max commands supported |
| 1212 | * @qdepth: scsi queue depth to support |
| 1213 | * @initial_cmdsn: initial iscsi CMDSN to be used for this session |
| 1214 | * |
| 1215 | * Creates a new iSCSI session instance on given device. |
| 1216 | */ |
| 1217 | static struct iscsi_cls_session * |
| 1218 | bnx2i_session_create(struct iscsi_endpoint *ep, |
| 1219 | uint16_t cmds_max, uint16_t qdepth, |
| 1220 | uint32_t initial_cmdsn) |
| 1221 | { |
| 1222 | struct Scsi_Host *shost; |
| 1223 | struct iscsi_cls_session *cls_session; |
| 1224 | struct bnx2i_hba *hba; |
| 1225 | struct bnx2i_endpoint *bnx2i_ep; |
| 1226 | |
| 1227 | if (!ep) { |
| 1228 | printk(KERN_ERR "bnx2i: missing ep.\n"); |
| 1229 | return NULL; |
| 1230 | } |
| 1231 | |
| 1232 | bnx2i_ep = ep->dd_data; |
| 1233 | shost = bnx2i_ep->hba->shost; |
| 1234 | hba = iscsi_host_priv(shost); |
| 1235 | if (bnx2i_adapter_ready(hba)) |
| 1236 | return NULL; |
| 1237 | |
| 1238 | /* |
| 1239 | * user can override hw limit as long as it is within |
| 1240 | * the min/max. |
| 1241 | */ |
| 1242 | if (cmds_max > hba->max_sqes) |
| 1243 | cmds_max = hba->max_sqes; |
| 1244 | else if (cmds_max < BNX2I_SQ_WQES_MIN) |
| 1245 | cmds_max = BNX2I_SQ_WQES_MIN; |
| 1246 | |
| 1247 | cls_session = iscsi_session_setup(&bnx2i_iscsi_transport, shost, |
| 1248 | cmds_max, sizeof(struct bnx2i_cmd), |
| 1249 | initial_cmdsn, ISCSI_MAX_TARGET); |
| 1250 | if (!cls_session) |
| 1251 | return NULL; |
| 1252 | |
| 1253 | if (bnx2i_setup_cmd_pool(hba, cls_session->dd_data)) |
| 1254 | goto session_teardown; |
| 1255 | return cls_session; |
| 1256 | |
| 1257 | session_teardown: |
| 1258 | iscsi_session_teardown(cls_session); |
| 1259 | return NULL; |
| 1260 | } |
| 1261 | |
| 1262 | |
| 1263 | /** |
| 1264 | * bnx2i_session_destroy - destroys iscsi session |
| 1265 | * @cls_session: pointer to iscsi cls session |
| 1266 | * |
| 1267 | * Destroys previously created iSCSI session instance and releases |
| 1268 | * all resources held by it |
| 1269 | */ |
| 1270 | static void bnx2i_session_destroy(struct iscsi_cls_session *cls_session) |
| 1271 | { |
| 1272 | struct iscsi_session *session = cls_session->dd_data; |
| 1273 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
| 1274 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
| 1275 | |
| 1276 | bnx2i_destroy_cmd_pool(hba, session); |
| 1277 | iscsi_session_teardown(cls_session); |
| 1278 | } |
| 1279 | |
| 1280 | |
| 1281 | /** |
| 1282 | * bnx2i_conn_create - create iscsi connection instance |
| 1283 | * @cls_session: pointer to iscsi cls session |
| 1284 | * @cid: iscsi cid as per rfc (not NX2's CID terminology) |
| 1285 | * |
| 1286 | * Creates a new iSCSI connection instance for a given session |
| 1287 | */ |
| 1288 | static struct iscsi_cls_conn * |
| 1289 | bnx2i_conn_create(struct iscsi_cls_session *cls_session, uint32_t cid) |
| 1290 | { |
| 1291 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
| 1292 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
| 1293 | struct bnx2i_conn *bnx2i_conn; |
| 1294 | struct iscsi_cls_conn *cls_conn; |
| 1295 | struct iscsi_conn *conn; |
| 1296 | |
| 1297 | cls_conn = iscsi_conn_setup(cls_session, sizeof(*bnx2i_conn), |
| 1298 | cid); |
| 1299 | if (!cls_conn) |
| 1300 | return NULL; |
| 1301 | conn = cls_conn->dd_data; |
| 1302 | |
| 1303 | bnx2i_conn = conn->dd_data; |
| 1304 | bnx2i_conn->cls_conn = cls_conn; |
| 1305 | bnx2i_conn->hba = hba; |
| 1306 | /* 'ep' ptr will be assigned in bind() call */ |
| 1307 | bnx2i_conn->ep = NULL; |
| 1308 | init_completion(&bnx2i_conn->cmd_cleanup_cmpl); |
| 1309 | |
| 1310 | if (bnx2i_conn_alloc_login_resources(hba, bnx2i_conn)) { |
| 1311 | iscsi_conn_printk(KERN_ALERT, conn, |
| 1312 | "conn_new: login resc alloc failed!!\n"); |
| 1313 | goto free_conn; |
| 1314 | } |
| 1315 | |
| 1316 | return cls_conn; |
| 1317 | |
| 1318 | free_conn: |
| 1319 | iscsi_conn_teardown(cls_conn); |
| 1320 | return NULL; |
| 1321 | } |
| 1322 | |
| 1323 | /** |
| 1324 | * bnx2i_conn_bind - binds iscsi sess, conn and ep objects together |
| 1325 | * @cls_session: pointer to iscsi cls session |
| 1326 | * @cls_conn: pointer to iscsi cls conn |
| 1327 | * @transport_fd: 64-bit EP handle |
| 1328 | * @is_leading: leading connection on this session? |
| 1329 | * |
| 1330 | * Binds together iSCSI session instance, iSCSI connection instance |
| 1331 | * and the TCP connection. This routine returns error code if |
| 1332 | * TCP connection does not belong on the device iSCSI sess/conn |
| 1333 | * is bound |
| 1334 | */ |
| 1335 | static int bnx2i_conn_bind(struct iscsi_cls_session *cls_session, |
| 1336 | struct iscsi_cls_conn *cls_conn, |
| 1337 | uint64_t transport_fd, int is_leading) |
| 1338 | { |
| 1339 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 1340 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
| 1341 | struct Scsi_Host *shost = iscsi_session_to_shost(cls_session); |
| 1342 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
| 1343 | struct bnx2i_endpoint *bnx2i_ep; |
| 1344 | struct iscsi_endpoint *ep; |
| 1345 | int ret_code; |
| 1346 | |
| 1347 | ep = iscsi_lookup_endpoint(transport_fd); |
| 1348 | if (!ep) |
| 1349 | return -EINVAL; |
| 1350 | |
| 1351 | bnx2i_ep = ep->dd_data; |
| 1352 | if ((bnx2i_ep->state == EP_STATE_TCP_FIN_RCVD) || |
| 1353 | (bnx2i_ep->state == EP_STATE_TCP_RST_RCVD)) |
| 1354 | /* Peer disconnect via' FIN or RST */ |
| 1355 | return -EINVAL; |
| 1356 | |
| 1357 | if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) |
| 1358 | return -EINVAL; |
| 1359 | |
| 1360 | if (bnx2i_ep->hba != hba) { |
| 1361 | /* Error - TCP connection does not belong to this device |
| 1362 | */ |
| 1363 | iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, |
| 1364 | "conn bind, ep=0x%p (%s) does not", |
| 1365 | bnx2i_ep, bnx2i_ep->hba->netdev->name); |
| 1366 | iscsi_conn_printk(KERN_ALERT, cls_conn->dd_data, |
| 1367 | "belong to hba (%s)\n", |
| 1368 | hba->netdev->name); |
| 1369 | return -EEXIST; |
| 1370 | } |
| 1371 | |
| 1372 | bnx2i_ep->conn = bnx2i_conn; |
| 1373 | bnx2i_conn->ep = bnx2i_ep; |
| 1374 | bnx2i_conn->iscsi_conn_cid = bnx2i_ep->ep_iscsi_cid; |
| 1375 | bnx2i_conn->fw_cid = bnx2i_ep->ep_cid; |
| 1376 | bnx2i_conn->is_bound = 1; |
| 1377 | |
| 1378 | ret_code = bnx2i_bind_conn_to_iscsi_cid(hba, bnx2i_conn, |
| 1379 | bnx2i_ep->ep_iscsi_cid); |
| 1380 | |
| 1381 | /* 5706/5708/5709 FW takes RQ as full when initiated, but for 57710 |
| 1382 | * driver needs to explicitly replenish RQ index during setup. |
| 1383 | */ |
| 1384 | if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) |
| 1385 | bnx2i_put_rq_buf(bnx2i_conn, 0); |
| 1386 | |
| 1387 | bnx2i_arm_cq_event_coalescing(bnx2i_conn->ep, CNIC_ARM_CQE); |
| 1388 | return ret_code; |
| 1389 | } |
| 1390 | |
| 1391 | |
| 1392 | /** |
| 1393 | * bnx2i_conn_destroy - destroy iscsi connection instance & release resources |
| 1394 | * @cls_conn: pointer to iscsi cls conn |
| 1395 | * |
| 1396 | * Destroy an iSCSI connection instance and release memory resources held by |
| 1397 | * this connection |
| 1398 | */ |
| 1399 | static void bnx2i_conn_destroy(struct iscsi_cls_conn *cls_conn) |
| 1400 | { |
| 1401 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 1402 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
| 1403 | struct Scsi_Host *shost; |
| 1404 | struct bnx2i_hba *hba; |
| 1405 | |
| 1406 | shost = iscsi_session_to_shost(iscsi_conn_to_session(cls_conn)); |
| 1407 | hba = iscsi_host_priv(shost); |
| 1408 | |
| 1409 | bnx2i_conn_free_login_resources(hba, bnx2i_conn); |
| 1410 | iscsi_conn_teardown(cls_conn); |
| 1411 | } |
| 1412 | |
| 1413 | |
| 1414 | /** |
| 1415 | * bnx2i_conn_get_param - return iscsi connection parameter to caller |
| 1416 | * @cls_conn: pointer to iscsi cls conn |
| 1417 | * @param: parameter type identifier |
| 1418 | * @buf: buffer pointer |
| 1419 | * |
| 1420 | * returns iSCSI connection parameters |
| 1421 | */ |
| 1422 | static int bnx2i_conn_get_param(struct iscsi_cls_conn *cls_conn, |
| 1423 | enum iscsi_param param, char *buf) |
| 1424 | { |
| 1425 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 1426 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
| 1427 | int len = 0; |
| 1428 | |
| 1429 | switch (param) { |
| 1430 | case ISCSI_PARAM_CONN_PORT: |
| 1431 | if (bnx2i_conn->ep) |
| 1432 | len = sprintf(buf, "%hu\n", |
| 1433 | bnx2i_conn->ep->cm_sk->dst_port); |
| 1434 | break; |
| 1435 | case ISCSI_PARAM_CONN_ADDRESS: |
| 1436 | if (bnx2i_conn->ep) |
| 1437 | len = sprintf(buf, NIPQUAD_FMT "\n", |
| 1438 | NIPQUAD(bnx2i_conn->ep->cm_sk->dst_ip)); |
| 1439 | break; |
| 1440 | default: |
| 1441 | return iscsi_conn_get_param(cls_conn, param, buf); |
| 1442 | } |
| 1443 | |
| 1444 | return len; |
| 1445 | } |
| 1446 | |
| 1447 | /** |
| 1448 | * bnx2i_host_get_param - returns host (adapter) related parameters |
| 1449 | * @shost: scsi host pointer |
| 1450 | * @param: parameter type identifier |
| 1451 | * @buf: buffer pointer |
| 1452 | */ |
| 1453 | static int bnx2i_host_get_param(struct Scsi_Host *shost, |
| 1454 | enum iscsi_host_param param, char *buf) |
| 1455 | { |
| 1456 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
| 1457 | int len = 0; |
| 1458 | |
| 1459 | switch (param) { |
| 1460 | case ISCSI_HOST_PARAM_HWADDRESS: |
| 1461 | len = sysfs_format_mac(buf, hba->cnic->mac_addr, 6); |
| 1462 | break; |
| 1463 | case ISCSI_HOST_PARAM_NETDEV_NAME: |
| 1464 | len = sprintf(buf, "%s\n", hba->netdev->name); |
| 1465 | break; |
| 1466 | default: |
| 1467 | return iscsi_host_get_param(shost, param, buf); |
| 1468 | } |
| 1469 | return len; |
| 1470 | } |
| 1471 | |
| 1472 | /** |
| 1473 | * bnx2i_conn_start - completes iscsi connection migration to FFP |
| 1474 | * @cls_conn: pointer to iscsi cls conn |
| 1475 | * |
| 1476 | * last call in FFP migration to handover iscsi conn to the driver |
| 1477 | */ |
| 1478 | static int bnx2i_conn_start(struct iscsi_cls_conn *cls_conn) |
| 1479 | { |
| 1480 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 1481 | struct bnx2i_conn *bnx2i_conn = conn->dd_data; |
| 1482 | |
| 1483 | bnx2i_conn->ep->state = EP_STATE_ULP_UPDATE_START; |
| 1484 | bnx2i_update_iscsi_conn(conn); |
| 1485 | |
| 1486 | /* |
| 1487 | * this should normally not sleep for a long time so it should |
| 1488 | * not disrupt the caller. |
| 1489 | */ |
| 1490 | bnx2i_conn->ep->ofld_timer.expires = 1 * HZ + jiffies; |
| 1491 | bnx2i_conn->ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
| 1492 | bnx2i_conn->ep->ofld_timer.data = (unsigned long) bnx2i_conn->ep; |
| 1493 | add_timer(&bnx2i_conn->ep->ofld_timer); |
| 1494 | /* update iSCSI context for this conn, wait for CNIC to complete */ |
| 1495 | wait_event_interruptible(bnx2i_conn->ep->ofld_wait, |
| 1496 | bnx2i_conn->ep->state != EP_STATE_ULP_UPDATE_START); |
| 1497 | |
| 1498 | if (signal_pending(current)) |
| 1499 | flush_signals(current); |
| 1500 | del_timer_sync(&bnx2i_conn->ep->ofld_timer); |
| 1501 | |
| 1502 | iscsi_conn_start(cls_conn); |
| 1503 | return 0; |
| 1504 | } |
| 1505 | |
| 1506 | |
| 1507 | /** |
| 1508 | * bnx2i_conn_get_stats - returns iSCSI stats |
| 1509 | * @cls_conn: pointer to iscsi cls conn |
| 1510 | * @stats: pointer to iscsi statistic struct |
| 1511 | */ |
| 1512 | static void bnx2i_conn_get_stats(struct iscsi_cls_conn *cls_conn, |
| 1513 | struct iscsi_stats *stats) |
| 1514 | { |
| 1515 | struct iscsi_conn *conn = cls_conn->dd_data; |
| 1516 | |
| 1517 | stats->txdata_octets = conn->txdata_octets; |
| 1518 | stats->rxdata_octets = conn->rxdata_octets; |
| 1519 | stats->scsicmd_pdus = conn->scsicmd_pdus_cnt; |
| 1520 | stats->dataout_pdus = conn->dataout_pdus_cnt; |
| 1521 | stats->scsirsp_pdus = conn->scsirsp_pdus_cnt; |
| 1522 | stats->datain_pdus = conn->datain_pdus_cnt; |
| 1523 | stats->r2t_pdus = conn->r2t_pdus_cnt; |
| 1524 | stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt; |
| 1525 | stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt; |
| 1526 | stats->custom_length = 3; |
| 1527 | strcpy(stats->custom[2].desc, "eh_abort_cnt"); |
| 1528 | stats->custom[2].value = conn->eh_abort_cnt; |
| 1529 | stats->digest_err = 0; |
| 1530 | stats->timeout_err = 0; |
| 1531 | stats->custom_length = 0; |
| 1532 | } |
| 1533 | |
| 1534 | |
| 1535 | /** |
| 1536 | * bnx2i_check_route - checks if target IP route belongs to one of NX2 devices |
| 1537 | * @dst_addr: target IP address |
| 1538 | * |
| 1539 | * check if route resolves to BNX2 device |
| 1540 | */ |
| 1541 | static struct bnx2i_hba *bnx2i_check_route(struct sockaddr *dst_addr) |
| 1542 | { |
| 1543 | struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; |
| 1544 | struct bnx2i_hba *hba; |
| 1545 | struct cnic_dev *cnic = NULL; |
| 1546 | |
| 1547 | bnx2i_reg_dev_all(); |
| 1548 | |
| 1549 | hba = get_adapter_list_head(); |
| 1550 | if (hba && hba->cnic) |
| 1551 | cnic = hba->cnic->cm_select_dev(desti, CNIC_ULP_ISCSI); |
| 1552 | if (!cnic) { |
| 1553 | printk(KERN_ALERT "bnx2i: no route," |
| 1554 | "can't connect using cnic\n"); |
| 1555 | goto no_nx2_route; |
| 1556 | } |
| 1557 | hba = bnx2i_find_hba_for_cnic(cnic); |
| 1558 | if (!hba) |
| 1559 | goto no_nx2_route; |
| 1560 | |
| 1561 | if (bnx2i_adapter_ready(hba)) { |
| 1562 | printk(KERN_ALERT "bnx2i: check route, hba not found\n"); |
| 1563 | goto no_nx2_route; |
| 1564 | } |
| 1565 | if (hba->netdev->mtu > hba->mtu_supported) { |
| 1566 | printk(KERN_ALERT "bnx2i: %s network i/f mtu is set to %d\n", |
| 1567 | hba->netdev->name, hba->netdev->mtu); |
| 1568 | printk(KERN_ALERT "bnx2i: iSCSI HBA can support mtu of %d\n", |
| 1569 | hba->mtu_supported); |
| 1570 | goto no_nx2_route; |
| 1571 | } |
| 1572 | return hba; |
| 1573 | no_nx2_route: |
| 1574 | return NULL; |
| 1575 | } |
| 1576 | |
| 1577 | |
| 1578 | /** |
| 1579 | * bnx2i_tear_down_conn - tear down iscsi/tcp connection and free resources |
| 1580 | * @hba: pointer to adapter instance |
| 1581 | * @ep: endpoint (transport indentifier) structure |
| 1582 | * |
| 1583 | * destroys cm_sock structure and on chip iscsi context |
| 1584 | */ |
| 1585 | static int bnx2i_tear_down_conn(struct bnx2i_hba *hba, |
| 1586 | struct bnx2i_endpoint *ep) |
| 1587 | { |
| 1588 | if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) |
| 1589 | hba->cnic->cm_destroy(ep->cm_sk); |
| 1590 | |
| 1591 | if (test_bit(ADAPTER_STATE_GOING_DOWN, &ep->hba->adapter_state)) |
| 1592 | ep->state = EP_STATE_DISCONN_COMPL; |
| 1593 | |
| 1594 | if (test_bit(BNX2I_NX2_DEV_57710, &hba->cnic_dev_type) && |
| 1595 | ep->state == EP_STATE_DISCONN_TIMEDOUT) { |
| 1596 | printk(KERN_ALERT "bnx2i - ERROR - please submit GRC Dump," |
| 1597 | " NW/PCIe trace, driver msgs to developers" |
| 1598 | " for analysis\n"); |
| 1599 | return 1; |
| 1600 | } |
| 1601 | |
| 1602 | ep->state = EP_STATE_CLEANUP_START; |
| 1603 | init_timer(&ep->ofld_timer); |
| 1604 | ep->ofld_timer.expires = 10*HZ + jiffies; |
| 1605 | ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
| 1606 | ep->ofld_timer.data = (unsigned long) ep; |
| 1607 | add_timer(&ep->ofld_timer); |
| 1608 | |
| 1609 | bnx2i_ep_destroy_list_add(hba, ep); |
| 1610 | |
| 1611 | /* destroy iSCSI context, wait for it to complete */ |
| 1612 | bnx2i_send_conn_destroy(hba, ep); |
| 1613 | wait_event_interruptible(ep->ofld_wait, |
| 1614 | (ep->state != EP_STATE_CLEANUP_START)); |
| 1615 | |
| 1616 | if (signal_pending(current)) |
| 1617 | flush_signals(current); |
| 1618 | del_timer_sync(&ep->ofld_timer); |
| 1619 | |
| 1620 | bnx2i_ep_destroy_list_del(hba, ep); |
| 1621 | |
| 1622 | if (ep->state != EP_STATE_CLEANUP_CMPL) |
| 1623 | /* should never happen */ |
| 1624 | printk(KERN_ALERT "bnx2i - conn destroy failed\n"); |
| 1625 | |
| 1626 | return 0; |
| 1627 | } |
| 1628 | |
| 1629 | |
| 1630 | /** |
| 1631 | * bnx2i_ep_connect - establish TCP connection to target portal |
| 1632 | * @shost: scsi host |
| 1633 | * @dst_addr: target IP address |
| 1634 | * @non_blocking: blocking or non-blocking call |
| 1635 | * |
| 1636 | * this routine initiates the TCP/IP connection by invoking Option-2 i/f |
| 1637 | * with l5_core and the CNIC. This is a multi-step process of resolving |
| 1638 | * route to target, create a iscsi connection context, handshaking with |
| 1639 | * CNIC module to create/initialize the socket struct and finally |
| 1640 | * sending down option-2 request to complete TCP 3-way handshake |
| 1641 | */ |
| 1642 | static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost, |
| 1643 | struct sockaddr *dst_addr, |
| 1644 | int non_blocking) |
| 1645 | { |
| 1646 | u32 iscsi_cid = BNX2I_CID_RESERVED; |
| 1647 | struct sockaddr_in *desti = (struct sockaddr_in *) dst_addr; |
| 1648 | struct sockaddr_in6 *desti6; |
| 1649 | struct bnx2i_endpoint *bnx2i_ep; |
| 1650 | struct bnx2i_hba *hba; |
| 1651 | struct cnic_dev *cnic; |
| 1652 | struct cnic_sockaddr saddr; |
| 1653 | struct iscsi_endpoint *ep; |
| 1654 | int rc = 0; |
| 1655 | |
Anil Veerabhadrappa | fac3cc4 | 2009-07-08 18:21:01 -0700 | [diff] [blame^] | 1656 | if (shost) { |
Michael Chan | cf4e636 | 2009-06-08 18:14:44 -0700 | [diff] [blame] | 1657 | /* driver is given scsi host to work with */ |
| 1658 | hba = iscsi_host_priv(shost); |
Anil Veerabhadrappa | fac3cc4 | 2009-07-08 18:21:01 -0700 | [diff] [blame^] | 1659 | /* Register the device with cnic if not already done so */ |
| 1660 | bnx2i_register_device(hba); |
| 1661 | } else |
Michael Chan | cf4e636 | 2009-06-08 18:14:44 -0700 | [diff] [blame] | 1662 | /* |
| 1663 | * check if the given destination can be reached through |
| 1664 | * a iscsi capable NetXtreme2 device |
| 1665 | */ |
| 1666 | hba = bnx2i_check_route(dst_addr); |
Anil Veerabhadrappa | fac3cc4 | 2009-07-08 18:21:01 -0700 | [diff] [blame^] | 1667 | |
Michael Chan | cf4e636 | 2009-06-08 18:14:44 -0700 | [diff] [blame] | 1668 | if (!hba) { |
| 1669 | rc = -ENOMEM; |
| 1670 | goto check_busy; |
| 1671 | } |
| 1672 | |
| 1673 | cnic = hba->cnic; |
| 1674 | ep = bnx2i_alloc_ep(hba); |
| 1675 | if (!ep) { |
| 1676 | rc = -ENOMEM; |
| 1677 | goto check_busy; |
| 1678 | } |
| 1679 | bnx2i_ep = ep->dd_data; |
| 1680 | |
| 1681 | mutex_lock(&hba->net_dev_lock); |
| 1682 | if (bnx2i_adapter_ready(hba)) { |
| 1683 | rc = -EPERM; |
| 1684 | goto net_if_down; |
| 1685 | } |
| 1686 | |
| 1687 | bnx2i_ep->state = EP_STATE_IDLE; |
| 1688 | bnx2i_ep->ep_iscsi_cid = (u16) -1; |
| 1689 | bnx2i_ep->num_active_cmds = 0; |
| 1690 | iscsi_cid = bnx2i_alloc_iscsi_cid(hba); |
| 1691 | if (iscsi_cid == -1) { |
| 1692 | printk(KERN_ALERT "alloc_ep: unable to allocate iscsi cid\n"); |
| 1693 | rc = -ENOMEM; |
| 1694 | goto iscsi_cid_err; |
| 1695 | } |
| 1696 | bnx2i_ep->hba_age = hba->age; |
| 1697 | |
| 1698 | rc = bnx2i_alloc_qp_resc(hba, bnx2i_ep); |
| 1699 | if (rc != 0) { |
| 1700 | printk(KERN_ALERT "bnx2i: ep_conn, alloc QP resc error\n"); |
| 1701 | rc = -ENOMEM; |
| 1702 | goto qp_resc_err; |
| 1703 | } |
| 1704 | |
| 1705 | bnx2i_ep->ep_iscsi_cid = (u16)iscsi_cid; |
| 1706 | bnx2i_ep->state = EP_STATE_OFLD_START; |
| 1707 | bnx2i_ep_ofld_list_add(hba, bnx2i_ep); |
| 1708 | |
| 1709 | init_timer(&bnx2i_ep->ofld_timer); |
| 1710 | bnx2i_ep->ofld_timer.expires = 2 * HZ + jiffies; |
| 1711 | bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
| 1712 | bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; |
| 1713 | add_timer(&bnx2i_ep->ofld_timer); |
| 1714 | |
| 1715 | bnx2i_send_conn_ofld_req(hba, bnx2i_ep); |
| 1716 | |
| 1717 | /* Wait for CNIC hardware to setup conn context and return 'cid' */ |
| 1718 | wait_event_interruptible(bnx2i_ep->ofld_wait, |
| 1719 | bnx2i_ep->state != EP_STATE_OFLD_START); |
| 1720 | |
| 1721 | if (signal_pending(current)) |
| 1722 | flush_signals(current); |
| 1723 | del_timer_sync(&bnx2i_ep->ofld_timer); |
| 1724 | |
| 1725 | bnx2i_ep_ofld_list_del(hba, bnx2i_ep); |
| 1726 | |
| 1727 | if (bnx2i_ep->state != EP_STATE_OFLD_COMPL) { |
| 1728 | rc = -ENOSPC; |
| 1729 | goto conn_failed; |
| 1730 | } |
| 1731 | |
| 1732 | rc = cnic->cm_create(cnic, CNIC_ULP_ISCSI, bnx2i_ep->ep_cid, |
| 1733 | iscsi_cid, &bnx2i_ep->cm_sk, bnx2i_ep); |
| 1734 | if (rc) { |
| 1735 | rc = -EINVAL; |
| 1736 | goto conn_failed; |
| 1737 | } |
| 1738 | |
| 1739 | bnx2i_ep->cm_sk->rcv_buf = 256 * 1024; |
| 1740 | bnx2i_ep->cm_sk->snd_buf = 256 * 1024; |
| 1741 | clear_bit(SK_TCP_TIMESTAMP, &bnx2i_ep->cm_sk->tcp_flags); |
| 1742 | |
| 1743 | memset(&saddr, 0, sizeof(saddr)); |
| 1744 | if (dst_addr->sa_family == AF_INET) { |
| 1745 | desti = (struct sockaddr_in *) dst_addr; |
| 1746 | saddr.remote.v4 = *desti; |
| 1747 | saddr.local.v4.sin_family = desti->sin_family; |
| 1748 | } else if (dst_addr->sa_family == AF_INET6) { |
| 1749 | desti6 = (struct sockaddr_in6 *) dst_addr; |
| 1750 | saddr.remote.v6 = *desti6; |
| 1751 | saddr.local.v6.sin6_family = desti6->sin6_family; |
| 1752 | } |
| 1753 | |
| 1754 | bnx2i_ep->timestamp = jiffies; |
| 1755 | bnx2i_ep->state = EP_STATE_CONNECT_START; |
| 1756 | if (!test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { |
| 1757 | rc = -EINVAL; |
| 1758 | goto conn_failed; |
| 1759 | } else |
| 1760 | rc = cnic->cm_connect(bnx2i_ep->cm_sk, &saddr); |
| 1761 | |
| 1762 | if (rc) |
| 1763 | goto release_ep; |
| 1764 | |
| 1765 | if (bnx2i_map_ep_dbell_regs(bnx2i_ep)) |
| 1766 | goto release_ep; |
| 1767 | mutex_unlock(&hba->net_dev_lock); |
| 1768 | return ep; |
| 1769 | |
| 1770 | release_ep: |
| 1771 | if (bnx2i_tear_down_conn(hba, bnx2i_ep)) { |
| 1772 | mutex_unlock(&hba->net_dev_lock); |
| 1773 | return ERR_PTR(rc); |
| 1774 | } |
| 1775 | conn_failed: |
| 1776 | net_if_down: |
| 1777 | iscsi_cid_err: |
| 1778 | bnx2i_free_qp_resc(hba, bnx2i_ep); |
| 1779 | qp_resc_err: |
| 1780 | bnx2i_free_ep(ep); |
| 1781 | mutex_unlock(&hba->net_dev_lock); |
| 1782 | check_busy: |
| 1783 | bnx2i_unreg_dev_all(); |
| 1784 | return ERR_PTR(rc); |
| 1785 | } |
| 1786 | |
| 1787 | |
| 1788 | /** |
| 1789 | * bnx2i_ep_poll - polls for TCP connection establishement |
| 1790 | * @ep: TCP connection (endpoint) handle |
| 1791 | * @timeout_ms: timeout value in milli secs |
| 1792 | * |
| 1793 | * polls for TCP connect request to complete |
| 1794 | */ |
| 1795 | static int bnx2i_ep_poll(struct iscsi_endpoint *ep, int timeout_ms) |
| 1796 | { |
| 1797 | struct bnx2i_endpoint *bnx2i_ep; |
| 1798 | int rc = 0; |
| 1799 | |
| 1800 | bnx2i_ep = ep->dd_data; |
| 1801 | if ((bnx2i_ep->state == EP_STATE_IDLE) || |
| 1802 | (bnx2i_ep->state == EP_STATE_CONNECT_FAILED) || |
| 1803 | (bnx2i_ep->state == EP_STATE_OFLD_FAILED)) |
| 1804 | return -1; |
| 1805 | if (bnx2i_ep->state == EP_STATE_CONNECT_COMPL) |
| 1806 | return 1; |
| 1807 | |
| 1808 | rc = wait_event_interruptible_timeout(bnx2i_ep->ofld_wait, |
| 1809 | ((bnx2i_ep->state == |
| 1810 | EP_STATE_OFLD_FAILED) || |
| 1811 | (bnx2i_ep->state == |
| 1812 | EP_STATE_CONNECT_FAILED) || |
| 1813 | (bnx2i_ep->state == |
| 1814 | EP_STATE_CONNECT_COMPL)), |
| 1815 | msecs_to_jiffies(timeout_ms)); |
| 1816 | if (!rc || (bnx2i_ep->state == EP_STATE_OFLD_FAILED)) |
| 1817 | rc = -1; |
| 1818 | |
| 1819 | if (rc > 0) |
| 1820 | return 1; |
| 1821 | else if (!rc) |
| 1822 | return 0; /* timeout */ |
| 1823 | else |
| 1824 | return rc; |
| 1825 | } |
| 1826 | |
| 1827 | |
| 1828 | /** |
| 1829 | * bnx2i_ep_tcp_conn_active - check EP state transition |
| 1830 | * @ep: endpoint pointer |
| 1831 | * |
| 1832 | * check if underlying TCP connection is active |
| 1833 | */ |
| 1834 | static int bnx2i_ep_tcp_conn_active(struct bnx2i_endpoint *bnx2i_ep) |
| 1835 | { |
| 1836 | int ret; |
| 1837 | int cnic_dev_10g = 0; |
| 1838 | |
| 1839 | if (test_bit(BNX2I_NX2_DEV_57710, &bnx2i_ep->hba->cnic_dev_type)) |
| 1840 | cnic_dev_10g = 1; |
| 1841 | |
| 1842 | switch (bnx2i_ep->state) { |
| 1843 | case EP_STATE_CONNECT_START: |
| 1844 | case EP_STATE_CLEANUP_FAILED: |
| 1845 | case EP_STATE_OFLD_FAILED: |
| 1846 | case EP_STATE_DISCONN_TIMEDOUT: |
| 1847 | ret = 0; |
| 1848 | break; |
| 1849 | case EP_STATE_CONNECT_COMPL: |
| 1850 | case EP_STATE_ULP_UPDATE_START: |
| 1851 | case EP_STATE_ULP_UPDATE_COMPL: |
| 1852 | case EP_STATE_TCP_FIN_RCVD: |
| 1853 | case EP_STATE_ULP_UPDATE_FAILED: |
| 1854 | ret = 1; |
| 1855 | break; |
| 1856 | case EP_STATE_TCP_RST_RCVD: |
| 1857 | ret = 0; |
| 1858 | break; |
| 1859 | case EP_STATE_CONNECT_FAILED: |
| 1860 | if (cnic_dev_10g) |
| 1861 | ret = 1; |
| 1862 | else |
| 1863 | ret = 0; |
| 1864 | break; |
| 1865 | default: |
| 1866 | ret = 0; |
| 1867 | } |
| 1868 | |
| 1869 | return ret; |
| 1870 | } |
| 1871 | |
| 1872 | |
| 1873 | /** |
| 1874 | * bnx2i_ep_disconnect - executes TCP connection teardown process |
| 1875 | * @ep: TCP connection (endpoint) handle |
| 1876 | * |
| 1877 | * executes TCP connection teardown process |
| 1878 | */ |
| 1879 | static void bnx2i_ep_disconnect(struct iscsi_endpoint *ep) |
| 1880 | { |
| 1881 | struct bnx2i_endpoint *bnx2i_ep; |
| 1882 | struct bnx2i_conn *bnx2i_conn = NULL; |
| 1883 | struct iscsi_session *session = NULL; |
| 1884 | struct iscsi_conn *conn; |
| 1885 | struct cnic_dev *cnic; |
| 1886 | struct bnx2i_hba *hba; |
| 1887 | |
| 1888 | bnx2i_ep = ep->dd_data; |
| 1889 | |
| 1890 | /* driver should not attempt connection cleanup untill TCP_CONNECT |
| 1891 | * completes either successfully or fails. Timeout is 9-secs, so |
| 1892 | * wait for it to complete |
| 1893 | */ |
| 1894 | while ((bnx2i_ep->state == EP_STATE_CONNECT_START) && |
| 1895 | !time_after(jiffies, bnx2i_ep->timestamp + (12 * HZ))) |
| 1896 | msleep(250); |
| 1897 | |
| 1898 | if (bnx2i_ep->conn) { |
| 1899 | bnx2i_conn = bnx2i_ep->conn; |
| 1900 | conn = bnx2i_conn->cls_conn->dd_data; |
| 1901 | session = conn->session; |
| 1902 | |
| 1903 | spin_lock_bh(&session->lock); |
| 1904 | bnx2i_conn->is_bound = 0; |
| 1905 | spin_unlock_bh(&session->lock); |
| 1906 | } |
| 1907 | |
| 1908 | hba = bnx2i_ep->hba; |
| 1909 | if (bnx2i_ep->state == EP_STATE_IDLE) |
| 1910 | goto return_bnx2i_ep; |
| 1911 | cnic = hba->cnic; |
| 1912 | |
| 1913 | mutex_lock(&hba->net_dev_lock); |
| 1914 | |
| 1915 | if (!test_bit(ADAPTER_STATE_UP, &hba->adapter_state)) |
| 1916 | goto free_resc; |
| 1917 | if (bnx2i_ep->hba_age != hba->age) |
| 1918 | goto free_resc; |
| 1919 | |
| 1920 | if (!bnx2i_ep_tcp_conn_active(bnx2i_ep)) |
| 1921 | goto destory_conn; |
| 1922 | |
| 1923 | bnx2i_ep->state = EP_STATE_DISCONN_START; |
| 1924 | |
| 1925 | init_timer(&bnx2i_ep->ofld_timer); |
| 1926 | bnx2i_ep->ofld_timer.expires = 10*HZ + jiffies; |
| 1927 | bnx2i_ep->ofld_timer.function = bnx2i_ep_ofld_timer; |
| 1928 | bnx2i_ep->ofld_timer.data = (unsigned long) bnx2i_ep; |
| 1929 | add_timer(&bnx2i_ep->ofld_timer); |
| 1930 | |
| 1931 | if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) { |
| 1932 | int close = 0; |
| 1933 | |
| 1934 | if (session) { |
| 1935 | spin_lock_bh(&session->lock); |
| 1936 | if (session->state == ISCSI_STATE_LOGGING_OUT) |
| 1937 | close = 1; |
| 1938 | spin_unlock_bh(&session->lock); |
| 1939 | } |
| 1940 | if (close) |
| 1941 | cnic->cm_close(bnx2i_ep->cm_sk); |
| 1942 | else |
| 1943 | cnic->cm_abort(bnx2i_ep->cm_sk); |
| 1944 | } else |
| 1945 | goto free_resc; |
| 1946 | |
| 1947 | /* wait for option-2 conn teardown */ |
| 1948 | wait_event_interruptible(bnx2i_ep->ofld_wait, |
| 1949 | bnx2i_ep->state != EP_STATE_DISCONN_START); |
| 1950 | |
| 1951 | if (signal_pending(current)) |
| 1952 | flush_signals(current); |
| 1953 | del_timer_sync(&bnx2i_ep->ofld_timer); |
| 1954 | |
| 1955 | destory_conn: |
| 1956 | if (bnx2i_tear_down_conn(hba, bnx2i_ep)) { |
| 1957 | mutex_unlock(&hba->net_dev_lock); |
| 1958 | return; |
| 1959 | } |
| 1960 | free_resc: |
| 1961 | mutex_unlock(&hba->net_dev_lock); |
| 1962 | bnx2i_free_qp_resc(hba, bnx2i_ep); |
| 1963 | return_bnx2i_ep: |
| 1964 | if (bnx2i_conn) |
| 1965 | bnx2i_conn->ep = NULL; |
| 1966 | |
| 1967 | bnx2i_free_ep(ep); |
| 1968 | |
| 1969 | if (!hba->ofld_conns_active) |
| 1970 | bnx2i_unreg_dev_all(); |
| 1971 | } |
| 1972 | |
| 1973 | |
| 1974 | /** |
| 1975 | * bnx2i_nl_set_path - ISCSI_UEVENT_PATH_UPDATE user message handler |
| 1976 | * @buf: pointer to buffer containing iscsi path message |
| 1977 | * |
| 1978 | */ |
| 1979 | static int bnx2i_nl_set_path(struct Scsi_Host *shost, struct iscsi_path *params) |
| 1980 | { |
| 1981 | struct bnx2i_hba *hba = iscsi_host_priv(shost); |
| 1982 | char *buf = (char *) params; |
| 1983 | u16 len = sizeof(*params); |
| 1984 | |
| 1985 | /* handled by cnic driver */ |
| 1986 | hba->cnic->iscsi_nl_msg_recv(hba->cnic, ISCSI_UEVENT_PATH_UPDATE, buf, |
| 1987 | len); |
| 1988 | |
| 1989 | return 0; |
| 1990 | } |
| 1991 | |
| 1992 | |
| 1993 | /* |
| 1994 | * 'Scsi_Host_Template' structure and 'iscsi_tranport' structure template |
| 1995 | * used while registering with the scsi host and iSCSI transport module. |
| 1996 | */ |
| 1997 | static struct scsi_host_template bnx2i_host_template = { |
| 1998 | .module = THIS_MODULE, |
| 1999 | .name = "Broadcom Offload iSCSI Initiator", |
| 2000 | .proc_name = "bnx2i", |
| 2001 | .queuecommand = iscsi_queuecommand, |
| 2002 | .eh_abort_handler = iscsi_eh_abort, |
| 2003 | .eh_device_reset_handler = iscsi_eh_device_reset, |
| 2004 | .eh_target_reset_handler = iscsi_eh_target_reset, |
| 2005 | .can_queue = 1024, |
| 2006 | .max_sectors = 127, |
| 2007 | .cmd_per_lun = 32, |
| 2008 | .this_id = -1, |
| 2009 | .use_clustering = ENABLE_CLUSTERING, |
| 2010 | .sg_tablesize = ISCSI_MAX_BDS_PER_CMD, |
| 2011 | .shost_attrs = bnx2i_dev_attributes, |
| 2012 | }; |
| 2013 | |
| 2014 | struct iscsi_transport bnx2i_iscsi_transport = { |
| 2015 | .owner = THIS_MODULE, |
| 2016 | .name = "bnx2i", |
| 2017 | .caps = CAP_RECOVERY_L0 | CAP_HDRDGST | |
| 2018 | CAP_MULTI_R2T | CAP_DATADGST | |
| 2019 | CAP_DATA_PATH_OFFLOAD, |
| 2020 | .param_mask = ISCSI_MAX_RECV_DLENGTH | |
| 2021 | ISCSI_MAX_XMIT_DLENGTH | |
| 2022 | ISCSI_HDRDGST_EN | |
| 2023 | ISCSI_DATADGST_EN | |
| 2024 | ISCSI_INITIAL_R2T_EN | |
| 2025 | ISCSI_MAX_R2T | |
| 2026 | ISCSI_IMM_DATA_EN | |
| 2027 | ISCSI_FIRST_BURST | |
| 2028 | ISCSI_MAX_BURST | |
| 2029 | ISCSI_PDU_INORDER_EN | |
| 2030 | ISCSI_DATASEQ_INORDER_EN | |
| 2031 | ISCSI_ERL | |
| 2032 | ISCSI_CONN_PORT | |
| 2033 | ISCSI_CONN_ADDRESS | |
| 2034 | ISCSI_EXP_STATSN | |
| 2035 | ISCSI_PERSISTENT_PORT | |
| 2036 | ISCSI_PERSISTENT_ADDRESS | |
| 2037 | ISCSI_TARGET_NAME | ISCSI_TPGT | |
| 2038 | ISCSI_USERNAME | ISCSI_PASSWORD | |
| 2039 | ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN | |
| 2040 | ISCSI_FAST_ABORT | ISCSI_ABORT_TMO | |
| 2041 | ISCSI_LU_RESET_TMO | |
| 2042 | ISCSI_PING_TMO | ISCSI_RECV_TMO | |
| 2043 | ISCSI_IFACE_NAME | ISCSI_INITIATOR_NAME, |
| 2044 | .host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_NETDEV_NAME, |
| 2045 | .create_session = bnx2i_session_create, |
| 2046 | .destroy_session = bnx2i_session_destroy, |
| 2047 | .create_conn = bnx2i_conn_create, |
| 2048 | .bind_conn = bnx2i_conn_bind, |
| 2049 | .destroy_conn = bnx2i_conn_destroy, |
| 2050 | .set_param = iscsi_set_param, |
| 2051 | .get_conn_param = bnx2i_conn_get_param, |
| 2052 | .get_session_param = iscsi_session_get_param, |
| 2053 | .get_host_param = bnx2i_host_get_param, |
| 2054 | .start_conn = bnx2i_conn_start, |
| 2055 | .stop_conn = iscsi_conn_stop, |
| 2056 | .send_pdu = iscsi_conn_send_pdu, |
| 2057 | .xmit_task = bnx2i_task_xmit, |
| 2058 | .get_stats = bnx2i_conn_get_stats, |
| 2059 | /* TCP connect - disconnect - option-2 interface calls */ |
| 2060 | .ep_connect = bnx2i_ep_connect, |
| 2061 | .ep_poll = bnx2i_ep_poll, |
| 2062 | .ep_disconnect = bnx2i_ep_disconnect, |
| 2063 | .set_path = bnx2i_nl_set_path, |
| 2064 | /* Error recovery timeout call */ |
| 2065 | .session_recovery_timedout = iscsi_session_recovery_timedout, |
| 2066 | .cleanup_task = bnx2i_cleanup_task, |
| 2067 | }; |