Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the Chelsio FCoE driver for Linux. |
| 3 | * |
| 4 | * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved. |
| 5 | * |
| 6 | * This software is available to you under a choice of one of two |
| 7 | * licenses. You may choose to be licensed under the terms of the GNU |
| 8 | * General Public License (GPL) Version 2, available from the file |
| 9 | * COPYING in the main directory of this source tree, or the |
| 10 | * OpenIB.org BSD license below: |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or |
| 13 | * without modification, are permitted provided that the following |
| 14 | * conditions are met: |
| 15 | * |
| 16 | * - Redistributions of source code must retain the above |
| 17 | * copyright notice, this list of conditions and the following |
| 18 | * disclaimer. |
| 19 | * |
| 20 | * - Redistributions in binary form must reproduce the above |
| 21 | * copyright notice, this list of conditions and the following |
| 22 | * disclaimer in the documentation and/or other materials |
| 23 | * provided with the distribution. |
| 24 | * |
| 25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 32 | * SOFTWARE. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/device.h> |
| 36 | #include <linux/delay.h> |
| 37 | #include <linux/ctype.h> |
| 38 | #include <linux/kernel.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <linux/string.h> |
| 41 | #include <linux/compiler.h> |
| 42 | #include <linux/export.h> |
| 43 | #include <linux/module.h> |
| 44 | #include <asm/unaligned.h> |
| 45 | #include <asm/page.h> |
| 46 | #include <scsi/scsi.h> |
| 47 | #include <scsi/scsi_device.h> |
| 48 | #include <scsi/scsi_transport_fc.h> |
| 49 | |
| 50 | #include "csio_hw.h" |
| 51 | #include "csio_lnode.h" |
| 52 | #include "csio_rnode.h" |
| 53 | #include "csio_scsi.h" |
| 54 | #include "csio_init.h" |
| 55 | |
| 56 | int csio_scsi_eqsize = 65536; |
| 57 | int csio_scsi_iqlen = 128; |
| 58 | int csio_scsi_ioreqs = 2048; |
| 59 | uint32_t csio_max_scan_tmo; |
| 60 | uint32_t csio_delta_scan_tmo = 5; |
| 61 | int csio_lun_qdepth = 32; |
| 62 | |
| 63 | static int csio_ddp_descs = 128; |
| 64 | |
| 65 | static int csio_do_abrt_cls(struct csio_hw *, |
| 66 | struct csio_ioreq *, bool); |
| 67 | |
| 68 | static void csio_scsis_uninit(struct csio_ioreq *, enum csio_scsi_ev); |
| 69 | static void csio_scsis_io_active(struct csio_ioreq *, enum csio_scsi_ev); |
| 70 | static void csio_scsis_tm_active(struct csio_ioreq *, enum csio_scsi_ev); |
| 71 | static void csio_scsis_aborting(struct csio_ioreq *, enum csio_scsi_ev); |
| 72 | static void csio_scsis_closing(struct csio_ioreq *, enum csio_scsi_ev); |
| 73 | static void csio_scsis_shost_cmpl_await(struct csio_ioreq *, enum csio_scsi_ev); |
| 74 | |
| 75 | /* |
| 76 | * csio_scsi_match_io - Match an ioreq with the given SCSI level data. |
| 77 | * @ioreq: The I/O request |
| 78 | * @sld: Level information |
| 79 | * |
| 80 | * Should be called with lock held. |
| 81 | * |
| 82 | */ |
| 83 | static bool |
| 84 | csio_scsi_match_io(struct csio_ioreq *ioreq, struct csio_scsi_level_data *sld) |
| 85 | { |
| 86 | struct scsi_cmnd *scmnd = csio_scsi_cmnd(ioreq); |
| 87 | |
| 88 | switch (sld->level) { |
| 89 | case CSIO_LEV_LUN: |
| 90 | if (scmnd == NULL) |
| 91 | return false; |
| 92 | |
| 93 | return ((ioreq->lnode == sld->lnode) && |
| 94 | (ioreq->rnode == sld->rnode) && |
| 95 | ((uint64_t)scmnd->device->lun == sld->oslun)); |
| 96 | |
| 97 | case CSIO_LEV_RNODE: |
| 98 | return ((ioreq->lnode == sld->lnode) && |
| 99 | (ioreq->rnode == sld->rnode)); |
| 100 | case CSIO_LEV_LNODE: |
| 101 | return (ioreq->lnode == sld->lnode); |
| 102 | case CSIO_LEV_ALL: |
| 103 | return true; |
| 104 | default: |
| 105 | return false; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * csio_scsi_gather_active_ios - Gather active I/Os based on level |
| 111 | * @scm: SCSI module |
| 112 | * @sld: Level information |
| 113 | * @dest: The queue where these I/Os have to be gathered. |
| 114 | * |
| 115 | * Should be called with lock held. |
| 116 | */ |
| 117 | static void |
| 118 | csio_scsi_gather_active_ios(struct csio_scsim *scm, |
| 119 | struct csio_scsi_level_data *sld, |
| 120 | struct list_head *dest) |
| 121 | { |
| 122 | struct list_head *tmp, *next; |
| 123 | |
| 124 | if (list_empty(&scm->active_q)) |
| 125 | return; |
| 126 | |
| 127 | /* Just splice the entire active_q into dest */ |
| 128 | if (sld->level == CSIO_LEV_ALL) { |
| 129 | list_splice_tail_init(&scm->active_q, dest); |
| 130 | return; |
| 131 | } |
| 132 | |
| 133 | list_for_each_safe(tmp, next, &scm->active_q) { |
| 134 | if (csio_scsi_match_io((struct csio_ioreq *)tmp, sld)) { |
| 135 | list_del_init(tmp); |
| 136 | list_add_tail(tmp, dest); |
| 137 | } |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static inline bool |
| 142 | csio_scsi_itnexus_loss_error(uint16_t error) |
| 143 | { |
| 144 | switch (error) { |
| 145 | case FW_ERR_LINK_DOWN: |
| 146 | case FW_RDEV_NOT_READY: |
| 147 | case FW_ERR_RDEV_LOST: |
| 148 | case FW_ERR_RDEV_LOGO: |
| 149 | case FW_ERR_RDEV_IMPL_LOGO: |
| 150 | return 1; |
| 151 | } |
| 152 | return 0; |
| 153 | } |
| 154 | |
| 155 | static inline void |
| 156 | csio_scsi_tag(struct scsi_cmnd *scmnd, uint8_t *tag, uint8_t hq, |
| 157 | uint8_t oq, uint8_t sq) |
| 158 | { |
| 159 | char stag[2]; |
| 160 | |
| 161 | if (scsi_populate_tag_msg(scmnd, stag)) { |
| 162 | switch (stag[0]) { |
| 163 | case HEAD_OF_QUEUE_TAG: |
| 164 | *tag = hq; |
| 165 | break; |
| 166 | case ORDERED_QUEUE_TAG: |
| 167 | *tag = oq; |
| 168 | break; |
| 169 | default: |
| 170 | *tag = sq; |
| 171 | break; |
| 172 | } |
| 173 | } else |
| 174 | *tag = 0; |
| 175 | } |
| 176 | |
| 177 | /* |
| 178 | * csio_scsi_fcp_cmnd - Frame the SCSI FCP command paylod. |
| 179 | * @req: IO req structure. |
| 180 | * @addr: DMA location to place the payload. |
| 181 | * |
| 182 | * This routine is shared between FCP_WRITE, FCP_READ and FCP_CMD requests. |
| 183 | */ |
| 184 | static inline void |
| 185 | csio_scsi_fcp_cmnd(struct csio_ioreq *req, void *addr) |
| 186 | { |
| 187 | struct fcp_cmnd *fcp_cmnd = (struct fcp_cmnd *)addr; |
| 188 | struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| 189 | |
| 190 | /* Check for Task Management */ |
| 191 | if (likely(scmnd->SCp.Message == 0)) { |
| 192 | int_to_scsilun(scmnd->device->lun, &fcp_cmnd->fc_lun); |
| 193 | fcp_cmnd->fc_tm_flags = 0; |
| 194 | fcp_cmnd->fc_cmdref = 0; |
| 195 | fcp_cmnd->fc_pri_ta = 0; |
| 196 | |
| 197 | memcpy(fcp_cmnd->fc_cdb, scmnd->cmnd, 16); |
| 198 | csio_scsi_tag(scmnd, &fcp_cmnd->fc_pri_ta, |
| 199 | FCP_PTA_HEADQ, FCP_PTA_ORDERED, FCP_PTA_SIMPLE); |
| 200 | fcp_cmnd->fc_dl = cpu_to_be32(scsi_bufflen(scmnd)); |
| 201 | |
| 202 | if (req->nsge) |
| 203 | if (req->datadir == DMA_TO_DEVICE) |
| 204 | fcp_cmnd->fc_flags = FCP_CFL_WRDATA; |
| 205 | else |
| 206 | fcp_cmnd->fc_flags = FCP_CFL_RDDATA; |
| 207 | else |
| 208 | fcp_cmnd->fc_flags = 0; |
| 209 | } else { |
| 210 | memset(fcp_cmnd, 0, sizeof(*fcp_cmnd)); |
| 211 | int_to_scsilun(scmnd->device->lun, &fcp_cmnd->fc_lun); |
| 212 | fcp_cmnd->fc_tm_flags = (uint8_t)scmnd->SCp.Message; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * csio_scsi_init_cmd_wr - Initialize the SCSI CMD WR. |
| 218 | * @req: IO req structure. |
| 219 | * @addr: DMA location to place the payload. |
| 220 | * @size: Size of WR (including FW WR + immed data + rsp SG entry |
| 221 | * |
| 222 | * Wrapper for populating fw_scsi_cmd_wr. |
| 223 | */ |
| 224 | static inline void |
| 225 | csio_scsi_init_cmd_wr(struct csio_ioreq *req, void *addr, uint32_t size) |
| 226 | { |
| 227 | struct csio_hw *hw = req->lnode->hwp; |
| 228 | struct csio_rnode *rn = req->rnode; |
| 229 | struct fw_scsi_cmd_wr *wr = (struct fw_scsi_cmd_wr *)addr; |
| 230 | struct csio_dma_buf *dma_buf; |
| 231 | uint8_t imm = csio_hw_to_scsim(hw)->proto_cmd_len; |
| 232 | |
| 233 | wr->op_immdlen = cpu_to_be32(FW_WR_OP(FW_SCSI_CMD_WR) | |
| 234 | FW_SCSI_CMD_WR_IMMDLEN(imm)); |
| 235 | wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID(rn->flowid) | |
| 236 | FW_WR_LEN16( |
| 237 | DIV_ROUND_UP(size, 16))); |
| 238 | |
| 239 | wr->cookie = (uintptr_t) req; |
Naresh Kumar Inna | 5036f0a | 2012-11-20 18:15:40 +0530 | [diff] [blame] | 240 | wr->iqid = cpu_to_be16(csio_q_physiqid(hw, req->iq_idx)); |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 241 | wr->tmo_val = (uint8_t) req->tmo; |
| 242 | wr->r3 = 0; |
| 243 | memset(&wr->r5, 0, 8); |
| 244 | |
| 245 | /* Get RSP DMA buffer */ |
| 246 | dma_buf = &req->dma_buf; |
| 247 | |
| 248 | /* Prepare RSP SGL */ |
| 249 | wr->rsp_dmalen = cpu_to_be32(dma_buf->len); |
| 250 | wr->rsp_dmaaddr = cpu_to_be64(dma_buf->paddr); |
| 251 | |
| 252 | wr->r6 = 0; |
| 253 | |
| 254 | wr->u.fcoe.ctl_pri = 0; |
| 255 | wr->u.fcoe.cp_en_class = 0; |
| 256 | wr->u.fcoe.r4_lo[0] = 0; |
| 257 | wr->u.fcoe.r4_lo[1] = 0; |
| 258 | |
| 259 | /* Frame a FCP command */ |
| 260 | csio_scsi_fcp_cmnd(req, (void *)((uintptr_t)addr + |
| 261 | sizeof(struct fw_scsi_cmd_wr))); |
| 262 | } |
| 263 | |
| 264 | #define CSIO_SCSI_CMD_WR_SZ(_imm) \ |
| 265 | (sizeof(struct fw_scsi_cmd_wr) + /* WR size */ \ |
| 266 | ALIGN((_imm), 16)) /* Immed data */ |
| 267 | |
| 268 | #define CSIO_SCSI_CMD_WR_SZ_16(_imm) \ |
| 269 | (ALIGN(CSIO_SCSI_CMD_WR_SZ((_imm)), 16)) |
| 270 | |
| 271 | /* |
| 272 | * csio_scsi_cmd - Create a SCSI CMD WR. |
| 273 | * @req: IO req structure. |
| 274 | * |
| 275 | * Gets a WR slot in the ingress queue and initializes it with SCSI CMD WR. |
| 276 | * |
| 277 | */ |
| 278 | static inline void |
| 279 | csio_scsi_cmd(struct csio_ioreq *req) |
| 280 | { |
| 281 | struct csio_wr_pair wrp; |
| 282 | struct csio_hw *hw = req->lnode->hwp; |
| 283 | struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| 284 | uint32_t size = CSIO_SCSI_CMD_WR_SZ_16(scsim->proto_cmd_len); |
| 285 | |
| 286 | req->drv_status = csio_wr_get(hw, req->eq_idx, size, &wrp); |
| 287 | if (unlikely(req->drv_status != 0)) |
| 288 | return; |
| 289 | |
| 290 | if (wrp.size1 >= size) { |
| 291 | /* Initialize WR in one shot */ |
| 292 | csio_scsi_init_cmd_wr(req, wrp.addr1, size); |
| 293 | } else { |
| 294 | uint8_t *tmpwr = csio_q_eq_wrap(hw, req->eq_idx); |
| 295 | |
| 296 | /* |
| 297 | * Make a temporary copy of the WR and write back |
| 298 | * the copy into the WR pair. |
| 299 | */ |
| 300 | csio_scsi_init_cmd_wr(req, (void *)tmpwr, size); |
| 301 | memcpy(wrp.addr1, tmpwr, wrp.size1); |
| 302 | memcpy(wrp.addr2, tmpwr + wrp.size1, size - wrp.size1); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * csio_scsi_init_ulptx_dsgl - Fill in a ULP_TX_SC_DSGL |
| 308 | * @hw: HW module |
| 309 | * @req: IO request |
| 310 | * @sgl: ULP TX SGL pointer. |
| 311 | * |
| 312 | */ |
| 313 | static inline void |
| 314 | csio_scsi_init_ultptx_dsgl(struct csio_hw *hw, struct csio_ioreq *req, |
| 315 | struct ulptx_sgl *sgl) |
| 316 | { |
| 317 | struct ulptx_sge_pair *sge_pair = NULL; |
| 318 | struct scatterlist *sgel; |
| 319 | uint32_t i = 0; |
| 320 | uint32_t xfer_len; |
| 321 | struct list_head *tmp; |
| 322 | struct csio_dma_buf *dma_buf; |
| 323 | struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| 324 | |
| 325 | sgl->cmd_nsge = htonl(ULPTX_CMD(ULP_TX_SC_DSGL) | ULPTX_MORE | |
| 326 | ULPTX_NSGE(req->nsge)); |
| 327 | /* Now add the data SGLs */ |
| 328 | if (likely(!req->dcopy)) { |
| 329 | scsi_for_each_sg(scmnd, sgel, req->nsge, i) { |
| 330 | if (i == 0) { |
| 331 | sgl->addr0 = cpu_to_be64(sg_dma_address(sgel)); |
| 332 | sgl->len0 = cpu_to_be32(sg_dma_len(sgel)); |
| 333 | sge_pair = (struct ulptx_sge_pair *)(sgl + 1); |
| 334 | continue; |
| 335 | } |
| 336 | if ((i - 1) & 0x1) { |
| 337 | sge_pair->addr[1] = cpu_to_be64( |
| 338 | sg_dma_address(sgel)); |
| 339 | sge_pair->len[1] = cpu_to_be32( |
| 340 | sg_dma_len(sgel)); |
| 341 | sge_pair++; |
| 342 | } else { |
| 343 | sge_pair->addr[0] = cpu_to_be64( |
| 344 | sg_dma_address(sgel)); |
| 345 | sge_pair->len[0] = cpu_to_be32( |
| 346 | sg_dma_len(sgel)); |
| 347 | } |
| 348 | } |
| 349 | } else { |
| 350 | /* Program sg elements with driver's DDP buffer */ |
| 351 | xfer_len = scsi_bufflen(scmnd); |
| 352 | list_for_each(tmp, &req->gen_list) { |
| 353 | dma_buf = (struct csio_dma_buf *)tmp; |
| 354 | if (i == 0) { |
| 355 | sgl->addr0 = cpu_to_be64(dma_buf->paddr); |
| 356 | sgl->len0 = cpu_to_be32( |
| 357 | min(xfer_len, dma_buf->len)); |
| 358 | sge_pair = (struct ulptx_sge_pair *)(sgl + 1); |
| 359 | } else if ((i - 1) & 0x1) { |
| 360 | sge_pair->addr[1] = cpu_to_be64(dma_buf->paddr); |
| 361 | sge_pair->len[1] = cpu_to_be32( |
| 362 | min(xfer_len, dma_buf->len)); |
| 363 | sge_pair++; |
| 364 | } else { |
| 365 | sge_pair->addr[0] = cpu_to_be64(dma_buf->paddr); |
| 366 | sge_pair->len[0] = cpu_to_be32( |
| 367 | min(xfer_len, dma_buf->len)); |
| 368 | } |
| 369 | xfer_len -= min(xfer_len, dma_buf->len); |
| 370 | i++; |
| 371 | } |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * csio_scsi_init_read_wr - Initialize the READ SCSI WR. |
| 377 | * @req: IO req structure. |
| 378 | * @wrp: DMA location to place the payload. |
| 379 | * @size: Size of WR (including FW WR + immed data + rsp SG entry + data SGL |
| 380 | * |
| 381 | * Wrapper for populating fw_scsi_read_wr. |
| 382 | */ |
| 383 | static inline void |
| 384 | csio_scsi_init_read_wr(struct csio_ioreq *req, void *wrp, uint32_t size) |
| 385 | { |
| 386 | struct csio_hw *hw = req->lnode->hwp; |
| 387 | struct csio_rnode *rn = req->rnode; |
| 388 | struct fw_scsi_read_wr *wr = (struct fw_scsi_read_wr *)wrp; |
| 389 | struct ulptx_sgl *sgl; |
| 390 | struct csio_dma_buf *dma_buf; |
| 391 | uint8_t imm = csio_hw_to_scsim(hw)->proto_cmd_len; |
| 392 | struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| 393 | |
| 394 | wr->op_immdlen = cpu_to_be32(FW_WR_OP(FW_SCSI_READ_WR) | |
| 395 | FW_SCSI_READ_WR_IMMDLEN(imm)); |
| 396 | wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID(rn->flowid) | |
| 397 | FW_WR_LEN16(DIV_ROUND_UP(size, 16))); |
| 398 | wr->cookie = (uintptr_t)req; |
Naresh Kumar Inna | 5036f0a | 2012-11-20 18:15:40 +0530 | [diff] [blame] | 399 | wr->iqid = cpu_to_be16(csio_q_physiqid(hw, req->iq_idx)); |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 400 | wr->tmo_val = (uint8_t)(req->tmo); |
| 401 | wr->use_xfer_cnt = 1; |
| 402 | wr->xfer_cnt = cpu_to_be32(scsi_bufflen(scmnd)); |
| 403 | wr->ini_xfer_cnt = cpu_to_be32(scsi_bufflen(scmnd)); |
| 404 | /* Get RSP DMA buffer */ |
| 405 | dma_buf = &req->dma_buf; |
| 406 | |
| 407 | /* Prepare RSP SGL */ |
| 408 | wr->rsp_dmalen = cpu_to_be32(dma_buf->len); |
| 409 | wr->rsp_dmaaddr = cpu_to_be64(dma_buf->paddr); |
| 410 | |
| 411 | wr->r4 = 0; |
| 412 | |
| 413 | wr->u.fcoe.ctl_pri = 0; |
| 414 | wr->u.fcoe.cp_en_class = 0; |
| 415 | wr->u.fcoe.r3_lo[0] = 0; |
| 416 | wr->u.fcoe.r3_lo[1] = 0; |
| 417 | csio_scsi_fcp_cmnd(req, (void *)((uintptr_t)wrp + |
| 418 | sizeof(struct fw_scsi_read_wr))); |
| 419 | |
| 420 | /* Move WR pointer past command and immediate data */ |
| 421 | sgl = (struct ulptx_sgl *)((uintptr_t)wrp + |
| 422 | sizeof(struct fw_scsi_read_wr) + ALIGN(imm, 16)); |
| 423 | |
| 424 | /* Fill in the DSGL */ |
| 425 | csio_scsi_init_ultptx_dsgl(hw, req, sgl); |
| 426 | } |
| 427 | |
| 428 | /* |
| 429 | * csio_scsi_init_write_wr - Initialize the WRITE SCSI WR. |
| 430 | * @req: IO req structure. |
| 431 | * @wrp: DMA location to place the payload. |
| 432 | * @size: Size of WR (including FW WR + immed data + rsp SG entry + data SGL |
| 433 | * |
| 434 | * Wrapper for populating fw_scsi_write_wr. |
| 435 | */ |
| 436 | static inline void |
| 437 | csio_scsi_init_write_wr(struct csio_ioreq *req, void *wrp, uint32_t size) |
| 438 | { |
| 439 | struct csio_hw *hw = req->lnode->hwp; |
| 440 | struct csio_rnode *rn = req->rnode; |
| 441 | struct fw_scsi_write_wr *wr = (struct fw_scsi_write_wr *)wrp; |
| 442 | struct ulptx_sgl *sgl; |
| 443 | struct csio_dma_buf *dma_buf; |
| 444 | uint8_t imm = csio_hw_to_scsim(hw)->proto_cmd_len; |
| 445 | struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| 446 | |
| 447 | wr->op_immdlen = cpu_to_be32(FW_WR_OP(FW_SCSI_WRITE_WR) | |
| 448 | FW_SCSI_WRITE_WR_IMMDLEN(imm)); |
| 449 | wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID(rn->flowid) | |
| 450 | FW_WR_LEN16(DIV_ROUND_UP(size, 16))); |
| 451 | wr->cookie = (uintptr_t)req; |
Naresh Kumar Inna | 5036f0a | 2012-11-20 18:15:40 +0530 | [diff] [blame] | 452 | wr->iqid = cpu_to_be16(csio_q_physiqid(hw, req->iq_idx)); |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 453 | wr->tmo_val = (uint8_t)(req->tmo); |
| 454 | wr->use_xfer_cnt = 1; |
| 455 | wr->xfer_cnt = cpu_to_be32(scsi_bufflen(scmnd)); |
| 456 | wr->ini_xfer_cnt = cpu_to_be32(scsi_bufflen(scmnd)); |
| 457 | /* Get RSP DMA buffer */ |
| 458 | dma_buf = &req->dma_buf; |
| 459 | |
| 460 | /* Prepare RSP SGL */ |
| 461 | wr->rsp_dmalen = cpu_to_be32(dma_buf->len); |
| 462 | wr->rsp_dmaaddr = cpu_to_be64(dma_buf->paddr); |
| 463 | |
| 464 | wr->r4 = 0; |
| 465 | |
| 466 | wr->u.fcoe.ctl_pri = 0; |
| 467 | wr->u.fcoe.cp_en_class = 0; |
| 468 | wr->u.fcoe.r3_lo[0] = 0; |
| 469 | wr->u.fcoe.r3_lo[1] = 0; |
| 470 | csio_scsi_fcp_cmnd(req, (void *)((uintptr_t)wrp + |
| 471 | sizeof(struct fw_scsi_write_wr))); |
| 472 | |
| 473 | /* Move WR pointer past command and immediate data */ |
| 474 | sgl = (struct ulptx_sgl *)((uintptr_t)wrp + |
| 475 | sizeof(struct fw_scsi_write_wr) + ALIGN(imm, 16)); |
| 476 | |
| 477 | /* Fill in the DSGL */ |
| 478 | csio_scsi_init_ultptx_dsgl(hw, req, sgl); |
| 479 | } |
| 480 | |
| 481 | /* Calculate WR size needed for fw_scsi_read_wr/fw_scsi_write_wr */ |
| 482 | #define CSIO_SCSI_DATA_WRSZ(req, oper, sz, imm) \ |
| 483 | do { \ |
| 484 | (sz) = sizeof(struct fw_scsi_##oper##_wr) + /* WR size */ \ |
| 485 | ALIGN((imm), 16) + /* Immed data */ \ |
| 486 | sizeof(struct ulptx_sgl); /* ulptx_sgl */ \ |
| 487 | \ |
| 488 | if (unlikely((req)->nsge > 1)) \ |
| 489 | (sz) += (sizeof(struct ulptx_sge_pair) * \ |
| 490 | (ALIGN(((req)->nsge - 1), 2) / 2)); \ |
| 491 | /* Data SGE */ \ |
| 492 | } while (0) |
| 493 | |
| 494 | /* |
| 495 | * csio_scsi_read - Create a SCSI READ WR. |
| 496 | * @req: IO req structure. |
| 497 | * |
| 498 | * Gets a WR slot in the ingress queue and initializes it with |
| 499 | * SCSI READ WR. |
| 500 | * |
| 501 | */ |
| 502 | static inline void |
| 503 | csio_scsi_read(struct csio_ioreq *req) |
| 504 | { |
| 505 | struct csio_wr_pair wrp; |
| 506 | uint32_t size; |
| 507 | struct csio_hw *hw = req->lnode->hwp; |
| 508 | struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| 509 | |
| 510 | CSIO_SCSI_DATA_WRSZ(req, read, size, scsim->proto_cmd_len); |
| 511 | size = ALIGN(size, 16); |
| 512 | |
| 513 | req->drv_status = csio_wr_get(hw, req->eq_idx, size, &wrp); |
| 514 | if (likely(req->drv_status == 0)) { |
| 515 | if (likely(wrp.size1 >= size)) { |
| 516 | /* Initialize WR in one shot */ |
| 517 | csio_scsi_init_read_wr(req, wrp.addr1, size); |
| 518 | } else { |
| 519 | uint8_t *tmpwr = csio_q_eq_wrap(hw, req->eq_idx); |
| 520 | /* |
| 521 | * Make a temporary copy of the WR and write back |
| 522 | * the copy into the WR pair. |
| 523 | */ |
| 524 | csio_scsi_init_read_wr(req, (void *)tmpwr, size); |
| 525 | memcpy(wrp.addr1, tmpwr, wrp.size1); |
| 526 | memcpy(wrp.addr2, tmpwr + wrp.size1, size - wrp.size1); |
| 527 | } |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * csio_scsi_write - Create a SCSI WRITE WR. |
| 533 | * @req: IO req structure. |
| 534 | * |
| 535 | * Gets a WR slot in the ingress queue and initializes it with |
| 536 | * SCSI WRITE WR. |
| 537 | * |
| 538 | */ |
| 539 | static inline void |
| 540 | csio_scsi_write(struct csio_ioreq *req) |
| 541 | { |
| 542 | struct csio_wr_pair wrp; |
| 543 | uint32_t size; |
| 544 | struct csio_hw *hw = req->lnode->hwp; |
| 545 | struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| 546 | |
| 547 | CSIO_SCSI_DATA_WRSZ(req, write, size, scsim->proto_cmd_len); |
| 548 | size = ALIGN(size, 16); |
| 549 | |
| 550 | req->drv_status = csio_wr_get(hw, req->eq_idx, size, &wrp); |
| 551 | if (likely(req->drv_status == 0)) { |
| 552 | if (likely(wrp.size1 >= size)) { |
| 553 | /* Initialize WR in one shot */ |
| 554 | csio_scsi_init_write_wr(req, wrp.addr1, size); |
| 555 | } else { |
| 556 | uint8_t *tmpwr = csio_q_eq_wrap(hw, req->eq_idx); |
| 557 | /* |
| 558 | * Make a temporary copy of the WR and write back |
| 559 | * the copy into the WR pair. |
| 560 | */ |
| 561 | csio_scsi_init_write_wr(req, (void *)tmpwr, size); |
| 562 | memcpy(wrp.addr1, tmpwr, wrp.size1); |
| 563 | memcpy(wrp.addr2, tmpwr + wrp.size1, size - wrp.size1); |
| 564 | } |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | /* |
| 569 | * csio_setup_ddp - Setup DDP buffers for Read request. |
| 570 | * @req: IO req structure. |
| 571 | * |
| 572 | * Checks SGLs/Data buffers are virtually contiguous required for DDP. |
| 573 | * If contiguous,driver posts SGLs in the WR otherwise post internal |
| 574 | * buffers for such request for DDP. |
| 575 | */ |
| 576 | static inline void |
| 577 | csio_setup_ddp(struct csio_scsim *scsim, struct csio_ioreq *req) |
| 578 | { |
| 579 | #ifdef __CSIO_DEBUG__ |
| 580 | struct csio_hw *hw = req->lnode->hwp; |
| 581 | #endif |
| 582 | struct scatterlist *sgel = NULL; |
| 583 | struct scsi_cmnd *scmnd = csio_scsi_cmnd(req); |
| 584 | uint64_t sg_addr = 0; |
| 585 | uint32_t ddp_pagesz = 4096; |
| 586 | uint32_t buf_off; |
| 587 | struct csio_dma_buf *dma_buf = NULL; |
| 588 | uint32_t alloc_len = 0; |
| 589 | uint32_t xfer_len = 0; |
| 590 | uint32_t sg_len = 0; |
| 591 | uint32_t i; |
| 592 | |
| 593 | scsi_for_each_sg(scmnd, sgel, req->nsge, i) { |
| 594 | sg_addr = sg_dma_address(sgel); |
| 595 | sg_len = sg_dma_len(sgel); |
| 596 | |
| 597 | buf_off = sg_addr & (ddp_pagesz - 1); |
| 598 | |
| 599 | /* Except 1st buffer,all buffer addr have to be Page aligned */ |
| 600 | if (i != 0 && buf_off) { |
| 601 | csio_dbg(hw, "SGL addr not DDP aligned (%llx:%d)\n", |
| 602 | sg_addr, sg_len); |
| 603 | goto unaligned; |
| 604 | } |
| 605 | |
| 606 | /* Except last buffer,all buffer must end on page boundary */ |
| 607 | if ((i != (req->nsge - 1)) && |
| 608 | ((buf_off + sg_len) & (ddp_pagesz - 1))) { |
| 609 | csio_dbg(hw, |
| 610 | "SGL addr not ending on page boundary" |
| 611 | "(%llx:%d)\n", sg_addr, sg_len); |
| 612 | goto unaligned; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | /* SGL's are virtually contiguous. HW will DDP to SGLs */ |
| 617 | req->dcopy = 0; |
| 618 | csio_scsi_read(req); |
| 619 | |
| 620 | return; |
| 621 | |
| 622 | unaligned: |
| 623 | CSIO_INC_STATS(scsim, n_unaligned); |
| 624 | /* |
| 625 | * For unaligned SGLs, driver will allocate internal DDP buffer. |
| 626 | * Once command is completed data from DDP buffer copied to SGLs |
| 627 | */ |
| 628 | req->dcopy = 1; |
| 629 | |
| 630 | /* Use gen_list to store the DDP buffers */ |
| 631 | INIT_LIST_HEAD(&req->gen_list); |
| 632 | xfer_len = scsi_bufflen(scmnd); |
| 633 | |
| 634 | i = 0; |
| 635 | /* Allocate ddp buffers for this request */ |
| 636 | while (alloc_len < xfer_len) { |
| 637 | dma_buf = csio_get_scsi_ddp(scsim); |
| 638 | if (dma_buf == NULL || i > scsim->max_sge) { |
| 639 | req->drv_status = -EBUSY; |
| 640 | break; |
| 641 | } |
| 642 | alloc_len += dma_buf->len; |
| 643 | /* Added to IO req */ |
| 644 | list_add_tail(&dma_buf->list, &req->gen_list); |
| 645 | i++; |
| 646 | } |
| 647 | |
| 648 | if (!req->drv_status) { |
| 649 | /* set number of ddp bufs used */ |
| 650 | req->nsge = i; |
| 651 | csio_scsi_read(req); |
| 652 | return; |
| 653 | } |
| 654 | |
| 655 | /* release dma descs */ |
| 656 | if (i > 0) |
| 657 | csio_put_scsi_ddp_list(scsim, &req->gen_list, i); |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * csio_scsi_init_abrt_cls_wr - Initialize an ABORT/CLOSE WR. |
| 662 | * @req: IO req structure. |
| 663 | * @addr: DMA location to place the payload. |
| 664 | * @size: Size of WR |
| 665 | * @abort: abort OR close |
| 666 | * |
| 667 | * Wrapper for populating fw_scsi_cmd_wr. |
| 668 | */ |
| 669 | static inline void |
| 670 | csio_scsi_init_abrt_cls_wr(struct csio_ioreq *req, void *addr, uint32_t size, |
| 671 | bool abort) |
| 672 | { |
| 673 | struct csio_hw *hw = req->lnode->hwp; |
| 674 | struct csio_rnode *rn = req->rnode; |
| 675 | struct fw_scsi_abrt_cls_wr *wr = (struct fw_scsi_abrt_cls_wr *)addr; |
| 676 | |
| 677 | wr->op_immdlen = cpu_to_be32(FW_WR_OP(FW_SCSI_ABRT_CLS_WR)); |
| 678 | wr->flowid_len16 = cpu_to_be32(FW_WR_FLOWID(rn->flowid) | |
| 679 | FW_WR_LEN16( |
| 680 | DIV_ROUND_UP(size, 16))); |
| 681 | |
| 682 | wr->cookie = (uintptr_t) req; |
Naresh Kumar Inna | 5036f0a | 2012-11-20 18:15:40 +0530 | [diff] [blame] | 683 | wr->iqid = cpu_to_be16(csio_q_physiqid(hw, req->iq_idx)); |
Naresh Kumar Inna | a3667aa | 2012-11-15 22:41:18 +0530 | [diff] [blame] | 684 | wr->tmo_val = (uint8_t) req->tmo; |
| 685 | /* 0 for CHK_ALL_IO tells FW to look up t_cookie */ |
| 686 | wr->sub_opcode_to_chk_all_io = |
| 687 | (FW_SCSI_ABRT_CLS_WR_SUB_OPCODE(abort) | |
| 688 | FW_SCSI_ABRT_CLS_WR_CHK_ALL_IO(0)); |
| 689 | wr->r3[0] = 0; |
| 690 | wr->r3[1] = 0; |
| 691 | wr->r3[2] = 0; |
| 692 | wr->r3[3] = 0; |
| 693 | /* Since we re-use the same ioreq for abort as well */ |
| 694 | wr->t_cookie = (uintptr_t) req; |
| 695 | } |
| 696 | |
| 697 | static inline void |
| 698 | csio_scsi_abrt_cls(struct csio_ioreq *req, bool abort) |
| 699 | { |
| 700 | struct csio_wr_pair wrp; |
| 701 | struct csio_hw *hw = req->lnode->hwp; |
| 702 | uint32_t size = ALIGN(sizeof(struct fw_scsi_abrt_cls_wr), 16); |
| 703 | |
| 704 | req->drv_status = csio_wr_get(hw, req->eq_idx, size, &wrp); |
| 705 | if (req->drv_status != 0) |
| 706 | return; |
| 707 | |
| 708 | if (wrp.size1 >= size) { |
| 709 | /* Initialize WR in one shot */ |
| 710 | csio_scsi_init_abrt_cls_wr(req, wrp.addr1, size, abort); |
| 711 | } else { |
| 712 | uint8_t *tmpwr = csio_q_eq_wrap(hw, req->eq_idx); |
| 713 | /* |
| 714 | * Make a temporary copy of the WR and write back |
| 715 | * the copy into the WR pair. |
| 716 | */ |
| 717 | csio_scsi_init_abrt_cls_wr(req, (void *)tmpwr, size, abort); |
| 718 | memcpy(wrp.addr1, tmpwr, wrp.size1); |
| 719 | memcpy(wrp.addr2, tmpwr + wrp.size1, size - wrp.size1); |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | /*****************************************************************************/ |
| 724 | /* START: SCSI SM */ |
| 725 | /*****************************************************************************/ |
| 726 | static void |
| 727 | csio_scsis_uninit(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| 728 | { |
| 729 | struct csio_hw *hw = req->lnode->hwp; |
| 730 | struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| 731 | |
| 732 | switch (evt) { |
| 733 | case CSIO_SCSIE_START_IO: |
| 734 | |
| 735 | if (req->nsge) { |
| 736 | if (req->datadir == DMA_TO_DEVICE) { |
| 737 | req->dcopy = 0; |
| 738 | csio_scsi_write(req); |
| 739 | } else |
| 740 | csio_setup_ddp(scsim, req); |
| 741 | } else { |
| 742 | csio_scsi_cmd(req); |
| 743 | } |
| 744 | |
| 745 | if (likely(req->drv_status == 0)) { |
| 746 | /* change state and enqueue on active_q */ |
| 747 | csio_set_state(&req->sm, csio_scsis_io_active); |
| 748 | list_add_tail(&req->sm.sm_list, &scsim->active_q); |
| 749 | csio_wr_issue(hw, req->eq_idx, false); |
| 750 | CSIO_INC_STATS(scsim, n_active); |
| 751 | |
| 752 | return; |
| 753 | } |
| 754 | break; |
| 755 | |
| 756 | case CSIO_SCSIE_START_TM: |
| 757 | csio_scsi_cmd(req); |
| 758 | if (req->drv_status == 0) { |
| 759 | /* |
| 760 | * NOTE: We collect the affected I/Os prior to issuing |
| 761 | * LUN reset, and not after it. This is to prevent |
| 762 | * aborting I/Os that get issued after the LUN reset, |
| 763 | * but prior to LUN reset completion (in the event that |
| 764 | * the host stack has not blocked I/Os to a LUN that is |
| 765 | * being reset. |
| 766 | */ |
| 767 | csio_set_state(&req->sm, csio_scsis_tm_active); |
| 768 | list_add_tail(&req->sm.sm_list, &scsim->active_q); |
| 769 | csio_wr_issue(hw, req->eq_idx, false); |
| 770 | CSIO_INC_STATS(scsim, n_tm_active); |
| 771 | } |
| 772 | return; |
| 773 | |
| 774 | case CSIO_SCSIE_ABORT: |
| 775 | case CSIO_SCSIE_CLOSE: |
| 776 | /* |
| 777 | * NOTE: |
| 778 | * We could get here due to : |
| 779 | * - a window in the cleanup path of the SCSI module |
| 780 | * (csio_scsi_abort_io()). Please see NOTE in this function. |
| 781 | * - a window in the time we tried to issue an abort/close |
| 782 | * of a request to FW, and the FW completed the request |
| 783 | * itself. |
| 784 | * Print a message for now, and return INVAL either way. |
| 785 | */ |
| 786 | req->drv_status = -EINVAL; |
| 787 | csio_warn(hw, "Trying to abort/close completed IO:%p!\n", req); |
| 788 | break; |
| 789 | |
| 790 | default: |
| 791 | csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| 792 | CSIO_DB_ASSERT(0); |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | static void |
| 797 | csio_scsis_io_active(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| 798 | { |
| 799 | struct csio_hw *hw = req->lnode->hwp; |
| 800 | struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| 801 | struct csio_rnode *rn; |
| 802 | |
| 803 | switch (evt) { |
| 804 | case CSIO_SCSIE_COMPLETED: |
| 805 | CSIO_DEC_STATS(scm, n_active); |
| 806 | list_del_init(&req->sm.sm_list); |
| 807 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 808 | /* |
| 809 | * In MSIX mode, with multiple queues, the SCSI compeltions |
| 810 | * could reach us sooner than the FW events sent to indicate |
| 811 | * I-T nexus loss (link down, remote device logo etc). We |
| 812 | * dont want to be returning such I/Os to the upper layer |
| 813 | * immediately, since we wouldnt have reported the I-T nexus |
| 814 | * loss itself. This forces us to serialize such completions |
| 815 | * with the reporting of the I-T nexus loss. Therefore, we |
| 816 | * internally queue up such up such completions in the rnode. |
| 817 | * The reporting of I-T nexus loss to the upper layer is then |
| 818 | * followed by the returning of I/Os in this internal queue. |
| 819 | * Having another state alongwith another queue helps us take |
| 820 | * actions for events such as ABORT received while we are |
| 821 | * in this rnode queue. |
| 822 | */ |
| 823 | if (unlikely(req->wr_status != FW_SUCCESS)) { |
| 824 | rn = req->rnode; |
| 825 | /* |
| 826 | * FW says remote device is lost, but rnode |
| 827 | * doesnt reflect it. |
| 828 | */ |
| 829 | if (csio_scsi_itnexus_loss_error(req->wr_status) && |
| 830 | csio_is_rnode_ready(rn)) { |
| 831 | csio_set_state(&req->sm, |
| 832 | csio_scsis_shost_cmpl_await); |
| 833 | list_add_tail(&req->sm.sm_list, |
| 834 | &rn->host_cmpl_q); |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | break; |
| 839 | |
| 840 | case CSIO_SCSIE_ABORT: |
| 841 | csio_scsi_abrt_cls(req, SCSI_ABORT); |
| 842 | if (req->drv_status == 0) { |
| 843 | csio_wr_issue(hw, req->eq_idx, false); |
| 844 | csio_set_state(&req->sm, csio_scsis_aborting); |
| 845 | } |
| 846 | break; |
| 847 | |
| 848 | case CSIO_SCSIE_CLOSE: |
| 849 | csio_scsi_abrt_cls(req, SCSI_CLOSE); |
| 850 | if (req->drv_status == 0) { |
| 851 | csio_wr_issue(hw, req->eq_idx, false); |
| 852 | csio_set_state(&req->sm, csio_scsis_closing); |
| 853 | } |
| 854 | break; |
| 855 | |
| 856 | case CSIO_SCSIE_DRVCLEANUP: |
| 857 | req->wr_status = FW_HOSTERROR; |
| 858 | CSIO_DEC_STATS(scm, n_active); |
| 859 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 860 | break; |
| 861 | |
| 862 | default: |
| 863 | csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| 864 | CSIO_DB_ASSERT(0); |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | static void |
| 869 | csio_scsis_tm_active(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| 870 | { |
| 871 | struct csio_hw *hw = req->lnode->hwp; |
| 872 | struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| 873 | |
| 874 | switch (evt) { |
| 875 | case CSIO_SCSIE_COMPLETED: |
| 876 | CSIO_DEC_STATS(scm, n_tm_active); |
| 877 | list_del_init(&req->sm.sm_list); |
| 878 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 879 | |
| 880 | break; |
| 881 | |
| 882 | case CSIO_SCSIE_ABORT: |
| 883 | csio_scsi_abrt_cls(req, SCSI_ABORT); |
| 884 | if (req->drv_status == 0) { |
| 885 | csio_wr_issue(hw, req->eq_idx, false); |
| 886 | csio_set_state(&req->sm, csio_scsis_aborting); |
| 887 | } |
| 888 | break; |
| 889 | |
| 890 | |
| 891 | case CSIO_SCSIE_CLOSE: |
| 892 | csio_scsi_abrt_cls(req, SCSI_CLOSE); |
| 893 | if (req->drv_status == 0) { |
| 894 | csio_wr_issue(hw, req->eq_idx, false); |
| 895 | csio_set_state(&req->sm, csio_scsis_closing); |
| 896 | } |
| 897 | break; |
| 898 | |
| 899 | case CSIO_SCSIE_DRVCLEANUP: |
| 900 | req->wr_status = FW_HOSTERROR; |
| 901 | CSIO_DEC_STATS(scm, n_tm_active); |
| 902 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 903 | break; |
| 904 | |
| 905 | default: |
| 906 | csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| 907 | CSIO_DB_ASSERT(0); |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | static void |
| 912 | csio_scsis_aborting(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| 913 | { |
| 914 | struct csio_hw *hw = req->lnode->hwp; |
| 915 | struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| 916 | |
| 917 | switch (evt) { |
| 918 | case CSIO_SCSIE_COMPLETED: |
| 919 | csio_dbg(hw, |
| 920 | "ioreq %p recvd cmpltd (wr_status:%d) " |
| 921 | "in aborting st\n", req, req->wr_status); |
| 922 | /* |
| 923 | * Use -ECANCELED to explicitly tell the ABORTED event that |
| 924 | * the original I/O was returned to driver by FW. |
| 925 | * We dont really care if the I/O was returned with success by |
| 926 | * FW (because the ABORT and completion of the I/O crossed each |
| 927 | * other), or any other return value. Once we are in aborting |
| 928 | * state, the success or failure of the I/O is unimportant to |
| 929 | * us. |
| 930 | */ |
| 931 | req->drv_status = -ECANCELED; |
| 932 | break; |
| 933 | |
| 934 | case CSIO_SCSIE_ABORT: |
| 935 | CSIO_INC_STATS(scm, n_abrt_dups); |
| 936 | break; |
| 937 | |
| 938 | case CSIO_SCSIE_ABORTED: |
| 939 | |
| 940 | csio_dbg(hw, "abort of %p return status:0x%x drv_status:%x\n", |
| 941 | req, req->wr_status, req->drv_status); |
| 942 | /* |
| 943 | * Check if original I/O WR completed before the Abort |
| 944 | * completion. |
| 945 | */ |
| 946 | if (req->drv_status != -ECANCELED) { |
| 947 | csio_warn(hw, |
| 948 | "Abort completed before original I/O," |
| 949 | " req:%p\n", req); |
| 950 | CSIO_DB_ASSERT(0); |
| 951 | } |
| 952 | |
| 953 | /* |
| 954 | * There are the following possible scenarios: |
| 955 | * 1. The abort completed successfully, FW returned FW_SUCCESS. |
| 956 | * 2. The completion of an I/O and the receipt of |
| 957 | * abort for that I/O by the FW crossed each other. |
| 958 | * The FW returned FW_EINVAL. The original I/O would have |
| 959 | * returned with FW_SUCCESS or any other SCSI error. |
| 960 | * 3. The FW couldnt sent the abort out on the wire, as there |
| 961 | * was an I-T nexus loss (link down, remote device logged |
| 962 | * out etc). FW sent back an appropriate IT nexus loss status |
| 963 | * for the abort. |
| 964 | * 4. FW sent an abort, but abort timed out (remote device |
| 965 | * didnt respond). FW replied back with |
| 966 | * FW_SCSI_ABORT_TIMEDOUT. |
| 967 | * 5. FW couldnt genuinely abort the request for some reason, |
| 968 | * and sent us an error. |
| 969 | * |
| 970 | * The first 3 scenarios are treated as succesful abort |
| 971 | * operations by the host, while the last 2 are failed attempts |
| 972 | * to abort. Manipulate the return value of the request |
| 973 | * appropriately, so that host can convey these results |
| 974 | * back to the upper layer. |
| 975 | */ |
| 976 | if ((req->wr_status == FW_SUCCESS) || |
| 977 | (req->wr_status == FW_EINVAL) || |
| 978 | csio_scsi_itnexus_loss_error(req->wr_status)) |
| 979 | req->wr_status = FW_SCSI_ABORT_REQUESTED; |
| 980 | |
| 981 | CSIO_DEC_STATS(scm, n_active); |
| 982 | list_del_init(&req->sm.sm_list); |
| 983 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 984 | break; |
| 985 | |
| 986 | case CSIO_SCSIE_DRVCLEANUP: |
| 987 | req->wr_status = FW_HOSTERROR; |
| 988 | CSIO_DEC_STATS(scm, n_active); |
| 989 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 990 | break; |
| 991 | |
| 992 | case CSIO_SCSIE_CLOSE: |
| 993 | /* |
| 994 | * We can receive this event from the module |
| 995 | * cleanup paths, if the FW forgot to reply to the ABORT WR |
| 996 | * and left this ioreq in this state. For now, just ignore |
| 997 | * the event. The CLOSE event is sent to this state, as |
| 998 | * the LINK may have already gone down. |
| 999 | */ |
| 1000 | break; |
| 1001 | |
| 1002 | default: |
| 1003 | csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| 1004 | CSIO_DB_ASSERT(0); |
| 1005 | } |
| 1006 | } |
| 1007 | |
| 1008 | static void |
| 1009 | csio_scsis_closing(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| 1010 | { |
| 1011 | struct csio_hw *hw = req->lnode->hwp; |
| 1012 | struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| 1013 | |
| 1014 | switch (evt) { |
| 1015 | case CSIO_SCSIE_COMPLETED: |
| 1016 | csio_dbg(hw, |
| 1017 | "ioreq %p recvd cmpltd (wr_status:%d) " |
| 1018 | "in closing st\n", req, req->wr_status); |
| 1019 | /* |
| 1020 | * Use -ECANCELED to explicitly tell the CLOSED event that |
| 1021 | * the original I/O was returned to driver by FW. |
| 1022 | * We dont really care if the I/O was returned with success by |
| 1023 | * FW (because the CLOSE and completion of the I/O crossed each |
| 1024 | * other), or any other return value. Once we are in aborting |
| 1025 | * state, the success or failure of the I/O is unimportant to |
| 1026 | * us. |
| 1027 | */ |
| 1028 | req->drv_status = -ECANCELED; |
| 1029 | break; |
| 1030 | |
| 1031 | case CSIO_SCSIE_CLOSED: |
| 1032 | /* |
| 1033 | * Check if original I/O WR completed before the Close |
| 1034 | * completion. |
| 1035 | */ |
| 1036 | if (req->drv_status != -ECANCELED) { |
| 1037 | csio_fatal(hw, |
| 1038 | "Close completed before original I/O," |
| 1039 | " req:%p\n", req); |
| 1040 | CSIO_DB_ASSERT(0); |
| 1041 | } |
| 1042 | |
| 1043 | /* |
| 1044 | * Either close succeeded, or we issued close to FW at the |
| 1045 | * same time FW compelted it to us. Either way, the I/O |
| 1046 | * is closed. |
| 1047 | */ |
| 1048 | CSIO_DB_ASSERT((req->wr_status == FW_SUCCESS) || |
| 1049 | (req->wr_status == FW_EINVAL)); |
| 1050 | req->wr_status = FW_SCSI_CLOSE_REQUESTED; |
| 1051 | |
| 1052 | CSIO_DEC_STATS(scm, n_active); |
| 1053 | list_del_init(&req->sm.sm_list); |
| 1054 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 1055 | break; |
| 1056 | |
| 1057 | case CSIO_SCSIE_CLOSE: |
| 1058 | break; |
| 1059 | |
| 1060 | case CSIO_SCSIE_DRVCLEANUP: |
| 1061 | req->wr_status = FW_HOSTERROR; |
| 1062 | CSIO_DEC_STATS(scm, n_active); |
| 1063 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 1064 | break; |
| 1065 | |
| 1066 | default: |
| 1067 | csio_dbg(hw, "Unhandled event:%d sent to req:%p\n", evt, req); |
| 1068 | CSIO_DB_ASSERT(0); |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | static void |
| 1073 | csio_scsis_shost_cmpl_await(struct csio_ioreq *req, enum csio_scsi_ev evt) |
| 1074 | { |
| 1075 | switch (evt) { |
| 1076 | case CSIO_SCSIE_ABORT: |
| 1077 | case CSIO_SCSIE_CLOSE: |
| 1078 | /* |
| 1079 | * Just succeed the abort request, and hope that |
| 1080 | * the remote device unregister path will cleanup |
| 1081 | * this I/O to the upper layer within a sane |
| 1082 | * amount of time. |
| 1083 | */ |
| 1084 | /* |
| 1085 | * A close can come in during a LINK DOWN. The FW would have |
| 1086 | * returned us the I/O back, but not the remote device lost |
| 1087 | * FW event. In this interval, if the I/O times out at the upper |
| 1088 | * layer, a close can come in. Take the same action as abort: |
| 1089 | * return success, and hope that the remote device unregister |
| 1090 | * path will cleanup this I/O. If the FW still doesnt send |
| 1091 | * the msg, the close times out, and the upper layer resorts |
| 1092 | * to the next level of error recovery. |
| 1093 | */ |
| 1094 | req->drv_status = 0; |
| 1095 | break; |
| 1096 | case CSIO_SCSIE_DRVCLEANUP: |
| 1097 | csio_set_state(&req->sm, csio_scsis_uninit); |
| 1098 | break; |
| 1099 | default: |
| 1100 | csio_dbg(req->lnode->hwp, "Unhandled event:%d sent to req:%p\n", |
| 1101 | evt, req); |
| 1102 | CSIO_DB_ASSERT(0); |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | /* |
| 1107 | * csio_scsi_cmpl_handler - WR completion handler for SCSI. |
| 1108 | * @hw: HW module. |
| 1109 | * @wr: The completed WR from the ingress queue. |
| 1110 | * @len: Length of the WR. |
| 1111 | * @flb: Freelist buffer array. |
| 1112 | * @priv: Private object |
| 1113 | * @scsiwr: Pointer to SCSI WR. |
| 1114 | * |
| 1115 | * This is the WR completion handler called per completion from the |
| 1116 | * ISR. It is called with lock held. It walks past the RSS and CPL message |
| 1117 | * header where the actual WR is present. |
| 1118 | * It then gets the status, WR handle (ioreq pointer) and the len of |
| 1119 | * the WR, based on WR opcode. Only on a non-good status is the entire |
| 1120 | * WR copied into the WR cache (ioreq->fw_wr). |
| 1121 | * The ioreq corresponding to the WR is returned to the caller. |
| 1122 | * NOTE: The SCSI queue doesnt allocate a freelist today, hence |
| 1123 | * no freelist buffer is expected. |
| 1124 | */ |
| 1125 | struct csio_ioreq * |
| 1126 | csio_scsi_cmpl_handler(struct csio_hw *hw, void *wr, uint32_t len, |
| 1127 | struct csio_fl_dma_buf *flb, void *priv, uint8_t **scsiwr) |
| 1128 | { |
| 1129 | struct csio_ioreq *ioreq = NULL; |
| 1130 | struct cpl_fw6_msg *cpl; |
| 1131 | uint8_t *tempwr; |
| 1132 | uint8_t status; |
| 1133 | struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| 1134 | |
| 1135 | /* skip RSS header */ |
| 1136 | cpl = (struct cpl_fw6_msg *)((uintptr_t)wr + sizeof(__be64)); |
| 1137 | |
| 1138 | if (unlikely(cpl->opcode != CPL_FW6_MSG)) { |
| 1139 | csio_warn(hw, "Error: Invalid CPL msg %x recvd on SCSI q\n", |
| 1140 | cpl->opcode); |
| 1141 | CSIO_INC_STATS(scm, n_inval_cplop); |
| 1142 | return NULL; |
| 1143 | } |
| 1144 | |
| 1145 | tempwr = (uint8_t *)(cpl->data); |
| 1146 | status = csio_wr_status(tempwr); |
| 1147 | *scsiwr = tempwr; |
| 1148 | |
| 1149 | if (likely((*tempwr == FW_SCSI_READ_WR) || |
| 1150 | (*tempwr == FW_SCSI_WRITE_WR) || |
| 1151 | (*tempwr == FW_SCSI_CMD_WR))) { |
| 1152 | ioreq = (struct csio_ioreq *)((uintptr_t) |
| 1153 | (((struct fw_scsi_read_wr *)tempwr)->cookie)); |
| 1154 | CSIO_DB_ASSERT(virt_addr_valid(ioreq)); |
| 1155 | |
| 1156 | ioreq->wr_status = status; |
| 1157 | |
| 1158 | return ioreq; |
| 1159 | } |
| 1160 | |
| 1161 | if (*tempwr == FW_SCSI_ABRT_CLS_WR) { |
| 1162 | ioreq = (struct csio_ioreq *)((uintptr_t) |
| 1163 | (((struct fw_scsi_abrt_cls_wr *)tempwr)->cookie)); |
| 1164 | CSIO_DB_ASSERT(virt_addr_valid(ioreq)); |
| 1165 | |
| 1166 | ioreq->wr_status = status; |
| 1167 | return ioreq; |
| 1168 | } |
| 1169 | |
| 1170 | csio_warn(hw, "WR with invalid opcode in SCSI IQ: %x\n", *tempwr); |
| 1171 | CSIO_INC_STATS(scm, n_inval_scsiop); |
| 1172 | return NULL; |
| 1173 | } |
| 1174 | |
| 1175 | /* |
| 1176 | * csio_scsi_cleanup_io_q - Cleanup the given queue. |
| 1177 | * @scm: SCSI module. |
| 1178 | * @q: Queue to be cleaned up. |
| 1179 | * |
| 1180 | * Called with lock held. Has to exit with lock held. |
| 1181 | */ |
| 1182 | void |
| 1183 | csio_scsi_cleanup_io_q(struct csio_scsim *scm, struct list_head *q) |
| 1184 | { |
| 1185 | struct csio_hw *hw = scm->hw; |
| 1186 | struct csio_ioreq *ioreq; |
| 1187 | struct list_head *tmp, *next; |
| 1188 | struct scsi_cmnd *scmnd; |
| 1189 | |
| 1190 | /* Call back the completion routines of the active_q */ |
| 1191 | list_for_each_safe(tmp, next, q) { |
| 1192 | ioreq = (struct csio_ioreq *)tmp; |
| 1193 | csio_scsi_drvcleanup(ioreq); |
| 1194 | list_del_init(&ioreq->sm.sm_list); |
| 1195 | scmnd = csio_scsi_cmnd(ioreq); |
| 1196 | spin_unlock_irq(&hw->lock); |
| 1197 | |
| 1198 | /* |
| 1199 | * Upper layers may have cleared this command, hence this |
| 1200 | * check to avoid accessing stale references. |
| 1201 | */ |
| 1202 | if (scmnd != NULL) |
| 1203 | ioreq->io_cbfn(hw, ioreq); |
| 1204 | |
| 1205 | spin_lock_irq(&scm->freelist_lock); |
| 1206 | csio_put_scsi_ioreq(scm, ioreq); |
| 1207 | spin_unlock_irq(&scm->freelist_lock); |
| 1208 | |
| 1209 | spin_lock_irq(&hw->lock); |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | #define CSIO_SCSI_ABORT_Q_POLL_MS 2000 |
| 1214 | |
| 1215 | static void |
| 1216 | csio_abrt_cls(struct csio_ioreq *ioreq, struct scsi_cmnd *scmnd) |
| 1217 | { |
| 1218 | struct csio_lnode *ln = ioreq->lnode; |
| 1219 | struct csio_hw *hw = ln->hwp; |
| 1220 | int ready = 0; |
| 1221 | struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| 1222 | int rv; |
| 1223 | |
| 1224 | if (csio_scsi_cmnd(ioreq) != scmnd) { |
| 1225 | CSIO_INC_STATS(scsim, n_abrt_race_comp); |
| 1226 | return; |
| 1227 | } |
| 1228 | |
| 1229 | ready = csio_is_lnode_ready(ln); |
| 1230 | |
| 1231 | rv = csio_do_abrt_cls(hw, ioreq, (ready ? SCSI_ABORT : SCSI_CLOSE)); |
| 1232 | if (rv != 0) { |
| 1233 | if (ready) |
| 1234 | CSIO_INC_STATS(scsim, n_abrt_busy_error); |
| 1235 | else |
| 1236 | CSIO_INC_STATS(scsim, n_cls_busy_error); |
| 1237 | } |
| 1238 | } |
| 1239 | |
| 1240 | /* |
| 1241 | * csio_scsi_abort_io_q - Abort all I/Os on given queue |
| 1242 | * @scm: SCSI module. |
| 1243 | * @q: Queue to abort. |
| 1244 | * @tmo: Timeout in ms |
| 1245 | * |
| 1246 | * Attempt to abort all I/Os on given queue, and wait for a max |
| 1247 | * of tmo milliseconds for them to complete. Returns success |
| 1248 | * if all I/Os are aborted. Else returns -ETIMEDOUT. |
| 1249 | * Should be entered with lock held. Exits with lock held. |
| 1250 | * NOTE: |
| 1251 | * Lock has to be held across the loop that aborts I/Os, since dropping the lock |
| 1252 | * in between can cause the list to be corrupted. As a result, the caller |
| 1253 | * of this function has to ensure that the number of I/os to be aborted |
| 1254 | * is finite enough to not cause lock-held-for-too-long issues. |
| 1255 | */ |
| 1256 | static int |
| 1257 | csio_scsi_abort_io_q(struct csio_scsim *scm, struct list_head *q, uint32_t tmo) |
| 1258 | { |
| 1259 | struct csio_hw *hw = scm->hw; |
| 1260 | struct list_head *tmp, *next; |
| 1261 | int count = DIV_ROUND_UP(tmo, CSIO_SCSI_ABORT_Q_POLL_MS); |
| 1262 | struct scsi_cmnd *scmnd; |
| 1263 | |
| 1264 | if (list_empty(q)) |
| 1265 | return 0; |
| 1266 | |
| 1267 | csio_dbg(hw, "Aborting SCSI I/Os\n"); |
| 1268 | |
| 1269 | /* Now abort/close I/Os in the queue passed */ |
| 1270 | list_for_each_safe(tmp, next, q) { |
| 1271 | scmnd = csio_scsi_cmnd((struct csio_ioreq *)tmp); |
| 1272 | csio_abrt_cls((struct csio_ioreq *)tmp, scmnd); |
| 1273 | } |
| 1274 | |
| 1275 | /* Wait till all active I/Os are completed/aborted/closed */ |
| 1276 | while (!list_empty(q) && count--) { |
| 1277 | spin_unlock_irq(&hw->lock); |
| 1278 | msleep(CSIO_SCSI_ABORT_Q_POLL_MS); |
| 1279 | spin_lock_irq(&hw->lock); |
| 1280 | } |
| 1281 | |
| 1282 | /* all aborts completed */ |
| 1283 | if (list_empty(q)) |
| 1284 | return 0; |
| 1285 | |
| 1286 | return -ETIMEDOUT; |
| 1287 | } |
| 1288 | |
| 1289 | /* |
| 1290 | * csio_scsim_cleanup_io - Cleanup all I/Os in SCSI module. |
| 1291 | * @scm: SCSI module. |
| 1292 | * @abort: abort required. |
| 1293 | * Called with lock held, should exit with lock held. |
| 1294 | * Can sleep when waiting for I/Os to complete. |
| 1295 | */ |
| 1296 | int |
| 1297 | csio_scsim_cleanup_io(struct csio_scsim *scm, bool abort) |
| 1298 | { |
| 1299 | struct csio_hw *hw = scm->hw; |
| 1300 | int rv = 0; |
| 1301 | int count = DIV_ROUND_UP(60 * 1000, CSIO_SCSI_ABORT_Q_POLL_MS); |
| 1302 | |
| 1303 | /* No I/Os pending */ |
| 1304 | if (list_empty(&scm->active_q)) |
| 1305 | return 0; |
| 1306 | |
| 1307 | /* Wait until all active I/Os are completed */ |
| 1308 | while (!list_empty(&scm->active_q) && count--) { |
| 1309 | spin_unlock_irq(&hw->lock); |
| 1310 | msleep(CSIO_SCSI_ABORT_Q_POLL_MS); |
| 1311 | spin_lock_irq(&hw->lock); |
| 1312 | } |
| 1313 | |
| 1314 | /* all I/Os completed */ |
| 1315 | if (list_empty(&scm->active_q)) |
| 1316 | return 0; |
| 1317 | |
| 1318 | /* Else abort */ |
| 1319 | if (abort) { |
| 1320 | rv = csio_scsi_abort_io_q(scm, &scm->active_q, 30000); |
| 1321 | if (rv == 0) |
| 1322 | return rv; |
| 1323 | csio_dbg(hw, "Some I/O aborts timed out, cleaning up..\n"); |
| 1324 | } |
| 1325 | |
| 1326 | csio_scsi_cleanup_io_q(scm, &scm->active_q); |
| 1327 | |
| 1328 | CSIO_DB_ASSERT(list_empty(&scm->active_q)); |
| 1329 | |
| 1330 | return rv; |
| 1331 | } |
| 1332 | |
| 1333 | /* |
| 1334 | * csio_scsim_cleanup_io_lnode - Cleanup all I/Os of given lnode. |
| 1335 | * @scm: SCSI module. |
| 1336 | * @lnode: lnode |
| 1337 | * |
| 1338 | * Called with lock held, should exit with lock held. |
| 1339 | * Can sleep (with dropped lock) when waiting for I/Os to complete. |
| 1340 | */ |
| 1341 | int |
| 1342 | csio_scsim_cleanup_io_lnode(struct csio_scsim *scm, struct csio_lnode *ln) |
| 1343 | { |
| 1344 | struct csio_hw *hw = scm->hw; |
| 1345 | struct csio_scsi_level_data sld; |
| 1346 | int rv; |
| 1347 | int count = DIV_ROUND_UP(60 * 1000, CSIO_SCSI_ABORT_Q_POLL_MS); |
| 1348 | |
| 1349 | csio_dbg(hw, "Gathering all SCSI I/Os on lnode %p\n", ln); |
| 1350 | |
| 1351 | sld.level = CSIO_LEV_LNODE; |
| 1352 | sld.lnode = ln; |
| 1353 | INIT_LIST_HEAD(&ln->cmpl_q); |
| 1354 | csio_scsi_gather_active_ios(scm, &sld, &ln->cmpl_q); |
| 1355 | |
| 1356 | /* No I/Os pending on this lnode */ |
| 1357 | if (list_empty(&ln->cmpl_q)) |
| 1358 | return 0; |
| 1359 | |
| 1360 | /* Wait until all active I/Os on this lnode are completed */ |
| 1361 | while (!list_empty(&ln->cmpl_q) && count--) { |
| 1362 | spin_unlock_irq(&hw->lock); |
| 1363 | msleep(CSIO_SCSI_ABORT_Q_POLL_MS); |
| 1364 | spin_lock_irq(&hw->lock); |
| 1365 | } |
| 1366 | |
| 1367 | /* all I/Os completed */ |
| 1368 | if (list_empty(&ln->cmpl_q)) |
| 1369 | return 0; |
| 1370 | |
| 1371 | csio_dbg(hw, "Some I/Os pending on ln:%p, aborting them..\n", ln); |
| 1372 | |
| 1373 | /* I/Os are pending, abort them */ |
| 1374 | rv = csio_scsi_abort_io_q(scm, &ln->cmpl_q, 30000); |
| 1375 | if (rv != 0) { |
| 1376 | csio_dbg(hw, "Some I/O aborts timed out, cleaning up..\n"); |
| 1377 | csio_scsi_cleanup_io_q(scm, &ln->cmpl_q); |
| 1378 | } |
| 1379 | |
| 1380 | CSIO_DB_ASSERT(list_empty(&ln->cmpl_q)); |
| 1381 | |
| 1382 | return rv; |
| 1383 | } |
| 1384 | |
| 1385 | static ssize_t |
| 1386 | csio_show_hw_state(struct device *dev, |
| 1387 | struct device_attribute *attr, char *buf) |
| 1388 | { |
| 1389 | struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| 1390 | struct csio_hw *hw = csio_lnode_to_hw(ln); |
| 1391 | |
| 1392 | if (csio_is_hw_ready(hw)) |
| 1393 | return snprintf(buf, PAGE_SIZE, "ready\n"); |
| 1394 | else |
| 1395 | return snprintf(buf, PAGE_SIZE, "not ready\n"); |
| 1396 | } |
| 1397 | |
| 1398 | /* Device reset */ |
| 1399 | static ssize_t |
| 1400 | csio_device_reset(struct device *dev, |
| 1401 | struct device_attribute *attr, const char *buf, size_t count) |
| 1402 | { |
| 1403 | struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| 1404 | struct csio_hw *hw = csio_lnode_to_hw(ln); |
| 1405 | |
| 1406 | if (*buf != '1') |
| 1407 | return -EINVAL; |
| 1408 | |
| 1409 | /* Delete NPIV lnodes */ |
| 1410 | csio_lnodes_exit(hw, 1); |
| 1411 | |
| 1412 | /* Block upper IOs */ |
| 1413 | csio_lnodes_block_request(hw); |
| 1414 | |
| 1415 | spin_lock_irq(&hw->lock); |
| 1416 | csio_hw_reset(hw); |
| 1417 | spin_unlock_irq(&hw->lock); |
| 1418 | |
| 1419 | /* Unblock upper IOs */ |
| 1420 | csio_lnodes_unblock_request(hw); |
| 1421 | return count; |
| 1422 | } |
| 1423 | |
| 1424 | /* disable port */ |
| 1425 | static ssize_t |
| 1426 | csio_disable_port(struct device *dev, |
| 1427 | struct device_attribute *attr, const char *buf, size_t count) |
| 1428 | { |
| 1429 | struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| 1430 | struct csio_hw *hw = csio_lnode_to_hw(ln); |
| 1431 | bool disable; |
| 1432 | |
| 1433 | if (*buf == '1' || *buf == '0') |
| 1434 | disable = (*buf == '1') ? true : false; |
| 1435 | else |
| 1436 | return -EINVAL; |
| 1437 | |
| 1438 | /* Block upper IOs */ |
| 1439 | csio_lnodes_block_by_port(hw, ln->portid); |
| 1440 | |
| 1441 | spin_lock_irq(&hw->lock); |
| 1442 | csio_disable_lnodes(hw, ln->portid, disable); |
| 1443 | spin_unlock_irq(&hw->lock); |
| 1444 | |
| 1445 | /* Unblock upper IOs */ |
| 1446 | csio_lnodes_unblock_by_port(hw, ln->portid); |
| 1447 | return count; |
| 1448 | } |
| 1449 | |
| 1450 | /* Show debug level */ |
| 1451 | static ssize_t |
| 1452 | csio_show_dbg_level(struct device *dev, |
| 1453 | struct device_attribute *attr, char *buf) |
| 1454 | { |
| 1455 | struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| 1456 | |
| 1457 | return snprintf(buf, PAGE_SIZE, "%x\n", ln->params.log_level); |
| 1458 | } |
| 1459 | |
| 1460 | /* Store debug level */ |
| 1461 | static ssize_t |
| 1462 | csio_store_dbg_level(struct device *dev, |
| 1463 | struct device_attribute *attr, const char *buf, size_t count) |
| 1464 | { |
| 1465 | struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| 1466 | struct csio_hw *hw = csio_lnode_to_hw(ln); |
| 1467 | uint32_t dbg_level = 0; |
| 1468 | |
| 1469 | if (!isdigit(buf[0])) |
| 1470 | return -EINVAL; |
| 1471 | |
| 1472 | if (sscanf(buf, "%i", &dbg_level)) |
| 1473 | return -EINVAL; |
| 1474 | |
| 1475 | ln->params.log_level = dbg_level; |
| 1476 | hw->params.log_level = dbg_level; |
| 1477 | |
| 1478 | return 0; |
| 1479 | } |
| 1480 | |
| 1481 | static DEVICE_ATTR(hw_state, S_IRUGO, csio_show_hw_state, NULL); |
| 1482 | static DEVICE_ATTR(device_reset, S_IRUGO | S_IWUSR, NULL, csio_device_reset); |
| 1483 | static DEVICE_ATTR(disable_port, S_IRUGO | S_IWUSR, NULL, csio_disable_port); |
| 1484 | static DEVICE_ATTR(dbg_level, S_IRUGO | S_IWUSR, csio_show_dbg_level, |
| 1485 | csio_store_dbg_level); |
| 1486 | |
| 1487 | static struct device_attribute *csio_fcoe_lport_attrs[] = { |
| 1488 | &dev_attr_hw_state, |
| 1489 | &dev_attr_device_reset, |
| 1490 | &dev_attr_disable_port, |
| 1491 | &dev_attr_dbg_level, |
| 1492 | NULL, |
| 1493 | }; |
| 1494 | |
| 1495 | static ssize_t |
| 1496 | csio_show_num_reg_rnodes(struct device *dev, |
| 1497 | struct device_attribute *attr, char *buf) |
| 1498 | { |
| 1499 | struct csio_lnode *ln = shost_priv(class_to_shost(dev)); |
| 1500 | |
| 1501 | return snprintf(buf, PAGE_SIZE, "%d\n", ln->num_reg_rnodes); |
| 1502 | } |
| 1503 | |
| 1504 | static DEVICE_ATTR(num_reg_rnodes, S_IRUGO, csio_show_num_reg_rnodes, NULL); |
| 1505 | |
| 1506 | static struct device_attribute *csio_fcoe_vport_attrs[] = { |
| 1507 | &dev_attr_num_reg_rnodes, |
| 1508 | &dev_attr_dbg_level, |
| 1509 | NULL, |
| 1510 | }; |
| 1511 | |
| 1512 | static inline uint32_t |
| 1513 | csio_scsi_copy_to_sgl(struct csio_hw *hw, struct csio_ioreq *req) |
| 1514 | { |
| 1515 | struct scsi_cmnd *scmnd = (struct scsi_cmnd *)csio_scsi_cmnd(req); |
| 1516 | struct scatterlist *sg; |
| 1517 | uint32_t bytes_left; |
| 1518 | uint32_t bytes_copy; |
| 1519 | uint32_t buf_off = 0; |
| 1520 | uint32_t start_off = 0; |
| 1521 | uint32_t sg_off = 0; |
| 1522 | void *sg_addr; |
| 1523 | void *buf_addr; |
| 1524 | struct csio_dma_buf *dma_buf; |
| 1525 | |
| 1526 | bytes_left = scsi_bufflen(scmnd); |
| 1527 | sg = scsi_sglist(scmnd); |
| 1528 | dma_buf = (struct csio_dma_buf *)csio_list_next(&req->gen_list); |
| 1529 | |
| 1530 | /* Copy data from driver buffer to SGs of SCSI CMD */ |
| 1531 | while (bytes_left > 0 && sg && dma_buf) { |
| 1532 | if (buf_off >= dma_buf->len) { |
| 1533 | buf_off = 0; |
| 1534 | dma_buf = (struct csio_dma_buf *) |
| 1535 | csio_list_next(dma_buf); |
| 1536 | continue; |
| 1537 | } |
| 1538 | |
| 1539 | if (start_off >= sg->length) { |
| 1540 | start_off -= sg->length; |
| 1541 | sg = sg_next(sg); |
| 1542 | continue; |
| 1543 | } |
| 1544 | |
| 1545 | buf_addr = dma_buf->vaddr + buf_off; |
| 1546 | sg_off = sg->offset + start_off; |
| 1547 | bytes_copy = min((dma_buf->len - buf_off), |
| 1548 | sg->length - start_off); |
| 1549 | bytes_copy = min((uint32_t)(PAGE_SIZE - (sg_off & ~PAGE_MASK)), |
| 1550 | bytes_copy); |
| 1551 | |
| 1552 | sg_addr = kmap_atomic(sg_page(sg) + (sg_off >> PAGE_SHIFT)); |
| 1553 | if (!sg_addr) { |
| 1554 | csio_err(hw, "failed to kmap sg:%p of ioreq:%p\n", |
| 1555 | sg, req); |
| 1556 | break; |
| 1557 | } |
| 1558 | |
| 1559 | csio_dbg(hw, "copy_to_sgl:sg_addr %p sg_off %d buf %p len %d\n", |
| 1560 | sg_addr, sg_off, buf_addr, bytes_copy); |
| 1561 | memcpy(sg_addr + (sg_off & ~PAGE_MASK), buf_addr, bytes_copy); |
| 1562 | kunmap_atomic(sg_addr); |
| 1563 | |
| 1564 | start_off += bytes_copy; |
| 1565 | buf_off += bytes_copy; |
| 1566 | bytes_left -= bytes_copy; |
| 1567 | } |
| 1568 | |
| 1569 | if (bytes_left > 0) |
| 1570 | return DID_ERROR; |
| 1571 | else |
| 1572 | return DID_OK; |
| 1573 | } |
| 1574 | |
| 1575 | /* |
| 1576 | * csio_scsi_err_handler - SCSI error handler. |
| 1577 | * @hw: HW module. |
| 1578 | * @req: IO request. |
| 1579 | * |
| 1580 | */ |
| 1581 | static inline void |
| 1582 | csio_scsi_err_handler(struct csio_hw *hw, struct csio_ioreq *req) |
| 1583 | { |
| 1584 | struct scsi_cmnd *cmnd = (struct scsi_cmnd *)csio_scsi_cmnd(req); |
| 1585 | struct csio_scsim *scm = csio_hw_to_scsim(hw); |
| 1586 | struct fcp_resp_with_ext *fcp_resp; |
| 1587 | struct fcp_resp_rsp_info *rsp_info; |
| 1588 | struct csio_dma_buf *dma_buf; |
| 1589 | uint8_t flags, scsi_status = 0; |
| 1590 | uint32_t host_status = DID_OK; |
| 1591 | uint32_t rsp_len = 0, sns_len = 0; |
| 1592 | struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); |
| 1593 | |
| 1594 | |
| 1595 | switch (req->wr_status) { |
| 1596 | case FW_HOSTERROR: |
| 1597 | if (unlikely(!csio_is_hw_ready(hw))) |
| 1598 | return; |
| 1599 | |
| 1600 | host_status = DID_ERROR; |
| 1601 | CSIO_INC_STATS(scm, n_hosterror); |
| 1602 | |
| 1603 | break; |
| 1604 | case FW_SCSI_RSP_ERR: |
| 1605 | dma_buf = &req->dma_buf; |
| 1606 | fcp_resp = (struct fcp_resp_with_ext *)dma_buf->vaddr; |
| 1607 | rsp_info = (struct fcp_resp_rsp_info *)(fcp_resp + 1); |
| 1608 | flags = fcp_resp->resp.fr_flags; |
| 1609 | scsi_status = fcp_resp->resp.fr_status; |
| 1610 | |
| 1611 | if (flags & FCP_RSP_LEN_VAL) { |
| 1612 | rsp_len = be32_to_cpu(fcp_resp->ext.fr_rsp_len); |
| 1613 | if ((rsp_len != 0 && rsp_len != 4 && rsp_len != 8) || |
| 1614 | (rsp_info->rsp_code != FCP_TMF_CMPL)) { |
| 1615 | host_status = DID_ERROR; |
| 1616 | goto out; |
| 1617 | } |
| 1618 | } |
| 1619 | |
| 1620 | if ((flags & FCP_SNS_LEN_VAL) && fcp_resp->ext.fr_sns_len) { |
| 1621 | sns_len = be32_to_cpu(fcp_resp->ext.fr_sns_len); |
| 1622 | if (sns_len > SCSI_SENSE_BUFFERSIZE) |
| 1623 | sns_len = SCSI_SENSE_BUFFERSIZE; |
| 1624 | |
| 1625 | memcpy(cmnd->sense_buffer, |
| 1626 | &rsp_info->_fr_resvd[0] + rsp_len, sns_len); |
| 1627 | CSIO_INC_STATS(scm, n_autosense); |
| 1628 | } |
| 1629 | |
| 1630 | scsi_set_resid(cmnd, 0); |
| 1631 | |
| 1632 | /* Under run */ |
| 1633 | if (flags & FCP_RESID_UNDER) { |
| 1634 | scsi_set_resid(cmnd, |
| 1635 | be32_to_cpu(fcp_resp->ext.fr_resid)); |
| 1636 | |
| 1637 | if (!(flags & FCP_SNS_LEN_VAL) && |
| 1638 | (scsi_status == SAM_STAT_GOOD) && |
| 1639 | ((scsi_bufflen(cmnd) - scsi_get_resid(cmnd)) |
| 1640 | < cmnd->underflow)) |
| 1641 | host_status = DID_ERROR; |
| 1642 | } else if (flags & FCP_RESID_OVER) |
| 1643 | host_status = DID_ERROR; |
| 1644 | |
| 1645 | CSIO_INC_STATS(scm, n_rsperror); |
| 1646 | break; |
| 1647 | |
| 1648 | case FW_SCSI_OVER_FLOW_ERR: |
| 1649 | csio_warn(hw, |
| 1650 | "Over-flow error,cmnd:0x%x expected len:0x%x" |
| 1651 | " resid:0x%x\n", cmnd->cmnd[0], |
| 1652 | scsi_bufflen(cmnd), scsi_get_resid(cmnd)); |
| 1653 | host_status = DID_ERROR; |
| 1654 | CSIO_INC_STATS(scm, n_ovflerror); |
| 1655 | break; |
| 1656 | |
| 1657 | case FW_SCSI_UNDER_FLOW_ERR: |
| 1658 | csio_warn(hw, |
| 1659 | "Under-flow error,cmnd:0x%x expected" |
| 1660 | " len:0x%x resid:0x%x lun:0x%x ssn:0x%x\n", |
| 1661 | cmnd->cmnd[0], scsi_bufflen(cmnd), |
| 1662 | scsi_get_resid(cmnd), cmnd->device->lun, |
| 1663 | rn->flowid); |
| 1664 | host_status = DID_ERROR; |
| 1665 | CSIO_INC_STATS(scm, n_unflerror); |
| 1666 | break; |
| 1667 | |
| 1668 | case FW_SCSI_ABORT_REQUESTED: |
| 1669 | case FW_SCSI_ABORTED: |
| 1670 | case FW_SCSI_CLOSE_REQUESTED: |
| 1671 | csio_dbg(hw, "Req %p cmd:%p op:%x %s\n", req, cmnd, |
| 1672 | cmnd->cmnd[0], |
| 1673 | (req->wr_status == FW_SCSI_CLOSE_REQUESTED) ? |
| 1674 | "closed" : "aborted"); |
| 1675 | /* |
| 1676 | * csio_eh_abort_handler checks this value to |
| 1677 | * succeed or fail the abort request. |
| 1678 | */ |
| 1679 | host_status = DID_REQUEUE; |
| 1680 | if (req->wr_status == FW_SCSI_CLOSE_REQUESTED) |
| 1681 | CSIO_INC_STATS(scm, n_closed); |
| 1682 | else |
| 1683 | CSIO_INC_STATS(scm, n_aborted); |
| 1684 | break; |
| 1685 | |
| 1686 | case FW_SCSI_ABORT_TIMEDOUT: |
| 1687 | /* FW timed out the abort itself */ |
| 1688 | csio_dbg(hw, "FW timed out abort req:%p cmnd:%p status:%x\n", |
| 1689 | req, cmnd, req->wr_status); |
| 1690 | host_status = DID_ERROR; |
| 1691 | CSIO_INC_STATS(scm, n_abrt_timedout); |
| 1692 | break; |
| 1693 | |
| 1694 | case FW_RDEV_NOT_READY: |
| 1695 | /* |
| 1696 | * In firmware, a RDEV can get into this state |
| 1697 | * temporarily, before moving into dissapeared/lost |
| 1698 | * state. So, the driver should complete the request equivalent |
| 1699 | * to device-disappeared! |
| 1700 | */ |
| 1701 | CSIO_INC_STATS(scm, n_rdev_nr_error); |
| 1702 | host_status = DID_ERROR; |
| 1703 | break; |
| 1704 | |
| 1705 | case FW_ERR_RDEV_LOST: |
| 1706 | CSIO_INC_STATS(scm, n_rdev_lost_error); |
| 1707 | host_status = DID_ERROR; |
| 1708 | break; |
| 1709 | |
| 1710 | case FW_ERR_RDEV_LOGO: |
| 1711 | CSIO_INC_STATS(scm, n_rdev_logo_error); |
| 1712 | host_status = DID_ERROR; |
| 1713 | break; |
| 1714 | |
| 1715 | case FW_ERR_RDEV_IMPL_LOGO: |
| 1716 | host_status = DID_ERROR; |
| 1717 | break; |
| 1718 | |
| 1719 | case FW_ERR_LINK_DOWN: |
| 1720 | CSIO_INC_STATS(scm, n_link_down_error); |
| 1721 | host_status = DID_ERROR; |
| 1722 | break; |
| 1723 | |
| 1724 | case FW_FCOE_NO_XCHG: |
| 1725 | CSIO_INC_STATS(scm, n_no_xchg_error); |
| 1726 | host_status = DID_ERROR; |
| 1727 | break; |
| 1728 | |
| 1729 | default: |
| 1730 | csio_err(hw, "Unknown SCSI FW WR status:%d req:%p cmnd:%p\n", |
| 1731 | req->wr_status, req, cmnd); |
| 1732 | CSIO_DB_ASSERT(0); |
| 1733 | |
| 1734 | CSIO_INC_STATS(scm, n_unknown_error); |
| 1735 | host_status = DID_ERROR; |
| 1736 | break; |
| 1737 | } |
| 1738 | |
| 1739 | out: |
| 1740 | if (req->nsge > 0) |
| 1741 | scsi_dma_unmap(cmnd); |
| 1742 | |
| 1743 | cmnd->result = (((host_status) << 16) | scsi_status); |
| 1744 | cmnd->scsi_done(cmnd); |
| 1745 | |
| 1746 | /* Wake up waiting threads */ |
| 1747 | csio_scsi_cmnd(req) = NULL; |
| 1748 | complete_all(&req->cmplobj); |
| 1749 | } |
| 1750 | |
| 1751 | /* |
| 1752 | * csio_scsi_cbfn - SCSI callback function. |
| 1753 | * @hw: HW module. |
| 1754 | * @req: IO request. |
| 1755 | * |
| 1756 | */ |
| 1757 | static void |
| 1758 | csio_scsi_cbfn(struct csio_hw *hw, struct csio_ioreq *req) |
| 1759 | { |
| 1760 | struct scsi_cmnd *cmnd = (struct scsi_cmnd *)csio_scsi_cmnd(req); |
| 1761 | uint8_t scsi_status = SAM_STAT_GOOD; |
| 1762 | uint32_t host_status = DID_OK; |
| 1763 | |
| 1764 | if (likely(req->wr_status == FW_SUCCESS)) { |
| 1765 | if (req->nsge > 0) { |
| 1766 | scsi_dma_unmap(cmnd); |
| 1767 | if (req->dcopy) |
| 1768 | host_status = csio_scsi_copy_to_sgl(hw, req); |
| 1769 | } |
| 1770 | |
| 1771 | cmnd->result = (((host_status) << 16) | scsi_status); |
| 1772 | cmnd->scsi_done(cmnd); |
| 1773 | csio_scsi_cmnd(req) = NULL; |
| 1774 | CSIO_INC_STATS(csio_hw_to_scsim(hw), n_tot_success); |
| 1775 | } else { |
| 1776 | /* Error handling */ |
| 1777 | csio_scsi_err_handler(hw, req); |
| 1778 | } |
| 1779 | } |
| 1780 | |
| 1781 | /** |
| 1782 | * csio_queuecommand - Entry point to kickstart an I/O request. |
| 1783 | * @host: The scsi_host pointer. |
| 1784 | * @cmnd: The I/O request from ML. |
| 1785 | * |
| 1786 | * This routine does the following: |
| 1787 | * - Checks for HW and Rnode module readiness. |
| 1788 | * - Gets a free ioreq structure (which is already initialized |
| 1789 | * to uninit during its allocation). |
| 1790 | * - Maps SG elements. |
| 1791 | * - Initializes ioreq members. |
| 1792 | * - Kicks off the SCSI state machine for this IO. |
| 1793 | * - Returns busy status on error. |
| 1794 | */ |
| 1795 | static int |
| 1796 | csio_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmnd) |
| 1797 | { |
| 1798 | struct csio_lnode *ln = shost_priv(host); |
| 1799 | struct csio_hw *hw = csio_lnode_to_hw(ln); |
| 1800 | struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| 1801 | struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); |
| 1802 | struct csio_ioreq *ioreq = NULL; |
| 1803 | unsigned long flags; |
| 1804 | int nsge = 0; |
| 1805 | int rv = SCSI_MLQUEUE_HOST_BUSY, nr; |
| 1806 | int retval; |
| 1807 | int cpu; |
| 1808 | struct csio_scsi_qset *sqset; |
| 1809 | struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); |
| 1810 | |
| 1811 | if (!blk_rq_cpu_valid(cmnd->request)) |
| 1812 | cpu = smp_processor_id(); |
| 1813 | else |
| 1814 | cpu = cmnd->request->cpu; |
| 1815 | |
| 1816 | sqset = &hw->sqset[ln->portid][cpu]; |
| 1817 | |
| 1818 | nr = fc_remote_port_chkready(rport); |
| 1819 | if (nr) { |
| 1820 | cmnd->result = nr; |
| 1821 | CSIO_INC_STATS(scsim, n_rn_nr_error); |
| 1822 | goto err_done; |
| 1823 | } |
| 1824 | |
| 1825 | if (unlikely(!csio_is_hw_ready(hw))) { |
| 1826 | cmnd->result = (DID_REQUEUE << 16); |
| 1827 | CSIO_INC_STATS(scsim, n_hw_nr_error); |
| 1828 | goto err_done; |
| 1829 | } |
| 1830 | |
| 1831 | /* Get req->nsge, if there are SG elements to be mapped */ |
| 1832 | nsge = scsi_dma_map(cmnd); |
| 1833 | if (unlikely(nsge < 0)) { |
| 1834 | CSIO_INC_STATS(scsim, n_dmamap_error); |
| 1835 | goto err; |
| 1836 | } |
| 1837 | |
| 1838 | /* Do we support so many mappings? */ |
| 1839 | if (unlikely(nsge > scsim->max_sge)) { |
| 1840 | csio_warn(hw, |
| 1841 | "More SGEs than can be supported." |
| 1842 | " SGEs: %d, Max SGEs: %d\n", nsge, scsim->max_sge); |
| 1843 | CSIO_INC_STATS(scsim, n_unsupp_sge_error); |
| 1844 | goto err_dma_unmap; |
| 1845 | } |
| 1846 | |
| 1847 | /* Get a free ioreq structure - SM is already set to uninit */ |
| 1848 | ioreq = csio_get_scsi_ioreq_lock(hw, scsim); |
| 1849 | if (!ioreq) { |
| 1850 | csio_err(hw, "Out of I/O request elements. Active #:%d\n", |
| 1851 | scsim->stats.n_active); |
| 1852 | CSIO_INC_STATS(scsim, n_no_req_error); |
| 1853 | goto err_dma_unmap; |
| 1854 | } |
| 1855 | |
| 1856 | ioreq->nsge = nsge; |
| 1857 | ioreq->lnode = ln; |
| 1858 | ioreq->rnode = rn; |
| 1859 | ioreq->iq_idx = sqset->iq_idx; |
| 1860 | ioreq->eq_idx = sqset->eq_idx; |
| 1861 | ioreq->wr_status = 0; |
| 1862 | ioreq->drv_status = 0; |
| 1863 | csio_scsi_cmnd(ioreq) = (void *)cmnd; |
| 1864 | ioreq->tmo = 0; |
| 1865 | ioreq->datadir = cmnd->sc_data_direction; |
| 1866 | |
| 1867 | if (cmnd->sc_data_direction == DMA_TO_DEVICE) { |
| 1868 | CSIO_INC_STATS(ln, n_output_requests); |
| 1869 | ln->stats.n_output_bytes += scsi_bufflen(cmnd); |
| 1870 | } else if (cmnd->sc_data_direction == DMA_FROM_DEVICE) { |
| 1871 | CSIO_INC_STATS(ln, n_input_requests); |
| 1872 | ln->stats.n_input_bytes += scsi_bufflen(cmnd); |
| 1873 | } else |
| 1874 | CSIO_INC_STATS(ln, n_control_requests); |
| 1875 | |
| 1876 | /* Set cbfn */ |
| 1877 | ioreq->io_cbfn = csio_scsi_cbfn; |
| 1878 | |
| 1879 | /* Needed during abort */ |
| 1880 | cmnd->host_scribble = (unsigned char *)ioreq; |
| 1881 | cmnd->SCp.Message = 0; |
| 1882 | |
| 1883 | /* Kick off SCSI IO SM on the ioreq */ |
| 1884 | spin_lock_irqsave(&hw->lock, flags); |
| 1885 | retval = csio_scsi_start_io(ioreq); |
| 1886 | spin_unlock_irqrestore(&hw->lock, flags); |
| 1887 | |
| 1888 | if (retval != 0) { |
| 1889 | csio_err(hw, "ioreq: %p couldnt be started, status:%d\n", |
| 1890 | ioreq, retval); |
| 1891 | CSIO_INC_STATS(scsim, n_busy_error); |
| 1892 | goto err_put_req; |
| 1893 | } |
| 1894 | |
| 1895 | return 0; |
| 1896 | |
| 1897 | err_put_req: |
| 1898 | csio_put_scsi_ioreq_lock(hw, scsim, ioreq); |
| 1899 | err_dma_unmap: |
| 1900 | if (nsge > 0) |
| 1901 | scsi_dma_unmap(cmnd); |
| 1902 | err: |
| 1903 | return rv; |
| 1904 | |
| 1905 | err_done: |
| 1906 | cmnd->scsi_done(cmnd); |
| 1907 | return 0; |
| 1908 | } |
| 1909 | |
| 1910 | static int |
| 1911 | csio_do_abrt_cls(struct csio_hw *hw, struct csio_ioreq *ioreq, bool abort) |
| 1912 | { |
| 1913 | int rv; |
| 1914 | int cpu = smp_processor_id(); |
| 1915 | struct csio_lnode *ln = ioreq->lnode; |
| 1916 | struct csio_scsi_qset *sqset = &hw->sqset[ln->portid][cpu]; |
| 1917 | |
| 1918 | ioreq->tmo = CSIO_SCSI_ABRT_TMO_MS; |
| 1919 | /* |
| 1920 | * Use current processor queue for posting the abort/close, but retain |
| 1921 | * the ingress queue ID of the original I/O being aborted/closed - we |
| 1922 | * need the abort/close completion to be received on the same queue |
| 1923 | * as the original I/O. |
| 1924 | */ |
| 1925 | ioreq->eq_idx = sqset->eq_idx; |
| 1926 | |
| 1927 | if (abort == SCSI_ABORT) |
| 1928 | rv = csio_scsi_abort(ioreq); |
| 1929 | else |
| 1930 | rv = csio_scsi_close(ioreq); |
| 1931 | |
| 1932 | return rv; |
| 1933 | } |
| 1934 | |
| 1935 | static int |
| 1936 | csio_eh_abort_handler(struct scsi_cmnd *cmnd) |
| 1937 | { |
| 1938 | struct csio_ioreq *ioreq; |
| 1939 | struct csio_lnode *ln = shost_priv(cmnd->device->host); |
| 1940 | struct csio_hw *hw = csio_lnode_to_hw(ln); |
| 1941 | struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| 1942 | int ready = 0, ret; |
| 1943 | unsigned long tmo = 0; |
| 1944 | int rv; |
| 1945 | struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); |
| 1946 | |
| 1947 | ret = fc_block_scsi_eh(cmnd); |
| 1948 | if (ret) |
| 1949 | return ret; |
| 1950 | |
| 1951 | ioreq = (struct csio_ioreq *)cmnd->host_scribble; |
| 1952 | if (!ioreq) |
| 1953 | return SUCCESS; |
| 1954 | |
| 1955 | if (!rn) |
| 1956 | return FAILED; |
| 1957 | |
| 1958 | csio_dbg(hw, |
| 1959 | "Request to abort ioreq:%p cmd:%p cdb:%08llx" |
| 1960 | " ssni:0x%x lun:%d iq:0x%x\n", |
| 1961 | ioreq, cmnd, *((uint64_t *)cmnd->cmnd), rn->flowid, |
| 1962 | cmnd->device->lun, csio_q_physiqid(hw, ioreq->iq_idx)); |
| 1963 | |
| 1964 | if (((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) != cmnd) { |
| 1965 | CSIO_INC_STATS(scsim, n_abrt_race_comp); |
| 1966 | return SUCCESS; |
| 1967 | } |
| 1968 | |
| 1969 | ready = csio_is_lnode_ready(ln); |
| 1970 | tmo = CSIO_SCSI_ABRT_TMO_MS; |
| 1971 | |
| 1972 | spin_lock_irq(&hw->lock); |
| 1973 | rv = csio_do_abrt_cls(hw, ioreq, (ready ? SCSI_ABORT : SCSI_CLOSE)); |
| 1974 | spin_unlock_irq(&hw->lock); |
| 1975 | |
| 1976 | if (rv != 0) { |
| 1977 | if (rv == -EINVAL) { |
| 1978 | /* Return success, if abort/close request issued on |
| 1979 | * already completed IO |
| 1980 | */ |
| 1981 | return SUCCESS; |
| 1982 | } |
| 1983 | if (ready) |
| 1984 | CSIO_INC_STATS(scsim, n_abrt_busy_error); |
| 1985 | else |
| 1986 | CSIO_INC_STATS(scsim, n_cls_busy_error); |
| 1987 | |
| 1988 | goto inval_scmnd; |
| 1989 | } |
| 1990 | |
| 1991 | /* Wait for completion */ |
| 1992 | init_completion(&ioreq->cmplobj); |
| 1993 | wait_for_completion_timeout(&ioreq->cmplobj, msecs_to_jiffies(tmo)); |
| 1994 | |
| 1995 | /* FW didnt respond to abort within our timeout */ |
| 1996 | if (((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == cmnd) { |
| 1997 | |
| 1998 | csio_err(hw, "Abort timed out -- req: %p\n", ioreq); |
| 1999 | CSIO_INC_STATS(scsim, n_abrt_timedout); |
| 2000 | |
| 2001 | inval_scmnd: |
| 2002 | if (ioreq->nsge > 0) |
| 2003 | scsi_dma_unmap(cmnd); |
| 2004 | |
| 2005 | spin_lock_irq(&hw->lock); |
| 2006 | csio_scsi_cmnd(ioreq) = NULL; |
| 2007 | spin_unlock_irq(&hw->lock); |
| 2008 | |
| 2009 | cmnd->result = (DID_ERROR << 16); |
| 2010 | cmnd->scsi_done(cmnd); |
| 2011 | |
| 2012 | return FAILED; |
| 2013 | } |
| 2014 | |
| 2015 | /* FW successfully aborted the request */ |
| 2016 | if (host_byte(cmnd->result) == DID_REQUEUE) { |
| 2017 | csio_info(hw, |
| 2018 | "Aborted SCSI command to (%d:%d) serial#:0x%lx\n", |
| 2019 | cmnd->device->id, cmnd->device->lun, |
| 2020 | cmnd->serial_number); |
| 2021 | return SUCCESS; |
| 2022 | } else { |
| 2023 | csio_info(hw, |
| 2024 | "Failed to abort SCSI command, (%d:%d) serial#:0x%lx\n", |
| 2025 | cmnd->device->id, cmnd->device->lun, |
| 2026 | cmnd->serial_number); |
| 2027 | return FAILED; |
| 2028 | } |
| 2029 | } |
| 2030 | |
| 2031 | /* |
| 2032 | * csio_tm_cbfn - TM callback function. |
| 2033 | * @hw: HW module. |
| 2034 | * @req: IO request. |
| 2035 | * |
| 2036 | * Cache the result in 'cmnd', since ioreq will be freed soon |
| 2037 | * after we return from here, and the waiting thread shouldnt trust |
| 2038 | * the ioreq contents. |
| 2039 | */ |
| 2040 | static void |
| 2041 | csio_tm_cbfn(struct csio_hw *hw, struct csio_ioreq *req) |
| 2042 | { |
| 2043 | struct scsi_cmnd *cmnd = (struct scsi_cmnd *)csio_scsi_cmnd(req); |
| 2044 | struct csio_dma_buf *dma_buf; |
| 2045 | uint8_t flags = 0; |
| 2046 | struct fcp_resp_with_ext *fcp_resp; |
| 2047 | struct fcp_resp_rsp_info *rsp_info; |
| 2048 | |
| 2049 | csio_dbg(hw, "req: %p in csio_tm_cbfn status: %d\n", |
| 2050 | req, req->wr_status); |
| 2051 | |
| 2052 | /* Cache FW return status */ |
| 2053 | cmnd->SCp.Status = req->wr_status; |
| 2054 | |
| 2055 | /* Special handling based on FCP response */ |
| 2056 | |
| 2057 | /* |
| 2058 | * FW returns us this error, if flags were set. FCP4 says |
| 2059 | * FCP_RSP_LEN_VAL in flags shall be set for TM completions. |
| 2060 | * So if a target were to set this bit, we expect that the |
| 2061 | * rsp_code is set to FCP_TMF_CMPL for a successful TM |
| 2062 | * completion. Any other rsp_code means TM operation failed. |
| 2063 | * If a target were to just ignore setting flags, we treat |
| 2064 | * the TM operation as success, and FW returns FW_SUCCESS. |
| 2065 | */ |
| 2066 | if (req->wr_status == FW_SCSI_RSP_ERR) { |
| 2067 | dma_buf = &req->dma_buf; |
| 2068 | fcp_resp = (struct fcp_resp_with_ext *)dma_buf->vaddr; |
| 2069 | rsp_info = (struct fcp_resp_rsp_info *)(fcp_resp + 1); |
| 2070 | |
| 2071 | flags = fcp_resp->resp.fr_flags; |
| 2072 | |
| 2073 | /* Modify return status if flags indicate success */ |
| 2074 | if (flags & FCP_RSP_LEN_VAL) |
| 2075 | if (rsp_info->rsp_code == FCP_TMF_CMPL) |
| 2076 | cmnd->SCp.Status = FW_SUCCESS; |
| 2077 | |
| 2078 | csio_dbg(hw, "TM FCP rsp code: %d\n", rsp_info->rsp_code); |
| 2079 | } |
| 2080 | |
| 2081 | /* Wake up the TM handler thread */ |
| 2082 | csio_scsi_cmnd(req) = NULL; |
| 2083 | } |
| 2084 | |
| 2085 | static int |
| 2086 | csio_eh_lun_reset_handler(struct scsi_cmnd *cmnd) |
| 2087 | { |
| 2088 | struct csio_lnode *ln = shost_priv(cmnd->device->host); |
| 2089 | struct csio_hw *hw = csio_lnode_to_hw(ln); |
| 2090 | struct csio_scsim *scsim = csio_hw_to_scsim(hw); |
| 2091 | struct csio_rnode *rn = (struct csio_rnode *)(cmnd->device->hostdata); |
| 2092 | struct csio_ioreq *ioreq = NULL; |
| 2093 | struct csio_scsi_qset *sqset; |
| 2094 | unsigned long flags; |
| 2095 | int retval; |
| 2096 | int count, ret; |
| 2097 | LIST_HEAD(local_q); |
| 2098 | struct csio_scsi_level_data sld; |
| 2099 | |
| 2100 | if (!rn) |
| 2101 | goto fail; |
| 2102 | |
| 2103 | csio_dbg(hw, "Request to reset LUN:%d (ssni:0x%x tgtid:%d)\n", |
| 2104 | cmnd->device->lun, rn->flowid, rn->scsi_id); |
| 2105 | |
| 2106 | if (!csio_is_lnode_ready(ln)) { |
| 2107 | csio_err(hw, |
| 2108 | "LUN reset cannot be issued on non-ready" |
| 2109 | " local node vnpi:0x%x (LUN:%d)\n", |
| 2110 | ln->vnp_flowid, cmnd->device->lun); |
| 2111 | goto fail; |
| 2112 | } |
| 2113 | |
| 2114 | /* Lnode is ready, now wait on rport node readiness */ |
| 2115 | ret = fc_block_scsi_eh(cmnd); |
| 2116 | if (ret) |
| 2117 | return ret; |
| 2118 | |
| 2119 | /* |
| 2120 | * If we have blocked in the previous call, at this point, either the |
| 2121 | * remote node has come back online, or device loss timer has fired |
| 2122 | * and the remote node is destroyed. Allow the LUN reset only for |
| 2123 | * the former case, since LUN reset is a TMF I/O on the wire, and we |
| 2124 | * need a valid session to issue it. |
| 2125 | */ |
| 2126 | if (fc_remote_port_chkready(rn->rport)) { |
| 2127 | csio_err(hw, |
| 2128 | "LUN reset cannot be issued on non-ready" |
| 2129 | " remote node ssni:0x%x (LUN:%d)\n", |
| 2130 | rn->flowid, cmnd->device->lun); |
| 2131 | goto fail; |
| 2132 | } |
| 2133 | |
| 2134 | /* Get a free ioreq structure - SM is already set to uninit */ |
| 2135 | ioreq = csio_get_scsi_ioreq_lock(hw, scsim); |
| 2136 | |
| 2137 | if (!ioreq) { |
| 2138 | csio_err(hw, "Out of IO request elements. Active # :%d\n", |
| 2139 | scsim->stats.n_active); |
| 2140 | goto fail; |
| 2141 | } |
| 2142 | |
| 2143 | sqset = &hw->sqset[ln->portid][smp_processor_id()]; |
| 2144 | ioreq->nsge = 0; |
| 2145 | ioreq->lnode = ln; |
| 2146 | ioreq->rnode = rn; |
| 2147 | ioreq->iq_idx = sqset->iq_idx; |
| 2148 | ioreq->eq_idx = sqset->eq_idx; |
| 2149 | |
| 2150 | csio_scsi_cmnd(ioreq) = cmnd; |
| 2151 | cmnd->host_scribble = (unsigned char *)ioreq; |
| 2152 | cmnd->SCp.Status = 0; |
| 2153 | |
| 2154 | cmnd->SCp.Message = FCP_TMF_LUN_RESET; |
| 2155 | ioreq->tmo = CSIO_SCSI_LUNRST_TMO_MS / 1000; |
| 2156 | |
| 2157 | /* |
| 2158 | * FW times the LUN reset for ioreq->tmo, so we got to wait a little |
| 2159 | * longer (10s for now) than that to allow FW to return the timed |
| 2160 | * out command. |
| 2161 | */ |
| 2162 | count = DIV_ROUND_UP((ioreq->tmo + 10) * 1000, CSIO_SCSI_TM_POLL_MS); |
| 2163 | |
| 2164 | /* Set cbfn */ |
| 2165 | ioreq->io_cbfn = csio_tm_cbfn; |
| 2166 | |
| 2167 | /* Save of the ioreq info for later use */ |
| 2168 | sld.level = CSIO_LEV_LUN; |
| 2169 | sld.lnode = ioreq->lnode; |
| 2170 | sld.rnode = ioreq->rnode; |
| 2171 | sld.oslun = (uint64_t)cmnd->device->lun; |
| 2172 | |
| 2173 | spin_lock_irqsave(&hw->lock, flags); |
| 2174 | /* Kick off TM SM on the ioreq */ |
| 2175 | retval = csio_scsi_start_tm(ioreq); |
| 2176 | spin_unlock_irqrestore(&hw->lock, flags); |
| 2177 | |
| 2178 | if (retval != 0) { |
| 2179 | csio_err(hw, "Failed to issue LUN reset, req:%p, status:%d\n", |
| 2180 | ioreq, retval); |
| 2181 | goto fail_ret_ioreq; |
| 2182 | } |
| 2183 | |
| 2184 | csio_dbg(hw, "Waiting max %d secs for LUN reset completion\n", |
| 2185 | count * (CSIO_SCSI_TM_POLL_MS / 1000)); |
| 2186 | /* Wait for completion */ |
| 2187 | while ((((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == cmnd) |
| 2188 | && count--) |
| 2189 | msleep(CSIO_SCSI_TM_POLL_MS); |
| 2190 | |
| 2191 | /* LUN reset timed-out */ |
| 2192 | if (((struct scsi_cmnd *)csio_scsi_cmnd(ioreq)) == cmnd) { |
| 2193 | csio_err(hw, "LUN reset (%d:%d) timed out\n", |
| 2194 | cmnd->device->id, cmnd->device->lun); |
| 2195 | |
| 2196 | spin_lock_irq(&hw->lock); |
| 2197 | csio_scsi_drvcleanup(ioreq); |
| 2198 | list_del_init(&ioreq->sm.sm_list); |
| 2199 | spin_unlock_irq(&hw->lock); |
| 2200 | |
| 2201 | goto fail_ret_ioreq; |
| 2202 | } |
| 2203 | |
| 2204 | /* LUN reset returned, check cached status */ |
| 2205 | if (cmnd->SCp.Status != FW_SUCCESS) { |
| 2206 | csio_err(hw, "LUN reset failed (%d:%d), status: %d\n", |
| 2207 | cmnd->device->id, cmnd->device->lun, cmnd->SCp.Status); |
| 2208 | goto fail; |
| 2209 | } |
| 2210 | |
| 2211 | /* LUN reset succeeded, Start aborting affected I/Os */ |
| 2212 | /* |
| 2213 | * Since the host guarantees during LUN reset that there |
| 2214 | * will not be any more I/Os to that LUN, until the LUN reset |
| 2215 | * completes, we gather pending I/Os after the LUN reset. |
| 2216 | */ |
| 2217 | spin_lock_irq(&hw->lock); |
| 2218 | csio_scsi_gather_active_ios(scsim, &sld, &local_q); |
| 2219 | |
| 2220 | retval = csio_scsi_abort_io_q(scsim, &local_q, 30000); |
| 2221 | spin_unlock_irq(&hw->lock); |
| 2222 | |
| 2223 | /* Aborts may have timed out */ |
| 2224 | if (retval != 0) { |
| 2225 | csio_err(hw, |
| 2226 | "Attempt to abort I/Os during LUN reset of %d" |
| 2227 | " returned %d\n", cmnd->device->lun, retval); |
| 2228 | /* Return I/Os back to active_q */ |
| 2229 | spin_lock_irq(&hw->lock); |
| 2230 | list_splice_tail_init(&local_q, &scsim->active_q); |
| 2231 | spin_unlock_irq(&hw->lock); |
| 2232 | goto fail; |
| 2233 | } |
| 2234 | |
| 2235 | CSIO_INC_STATS(rn, n_lun_rst); |
| 2236 | |
| 2237 | csio_info(hw, "LUN reset occurred (%d:%d)\n", |
| 2238 | cmnd->device->id, cmnd->device->lun); |
| 2239 | |
| 2240 | return SUCCESS; |
| 2241 | |
| 2242 | fail_ret_ioreq: |
| 2243 | csio_put_scsi_ioreq_lock(hw, scsim, ioreq); |
| 2244 | fail: |
| 2245 | CSIO_INC_STATS(rn, n_lun_rst_fail); |
| 2246 | return FAILED; |
| 2247 | } |
| 2248 | |
| 2249 | static int |
| 2250 | csio_slave_alloc(struct scsi_device *sdev) |
| 2251 | { |
| 2252 | struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); |
| 2253 | |
| 2254 | if (!rport || fc_remote_port_chkready(rport)) |
| 2255 | return -ENXIO; |
| 2256 | |
| 2257 | sdev->hostdata = *((struct csio_lnode **)(rport->dd_data)); |
| 2258 | |
| 2259 | return 0; |
| 2260 | } |
| 2261 | |
| 2262 | static int |
| 2263 | csio_slave_configure(struct scsi_device *sdev) |
| 2264 | { |
| 2265 | if (sdev->tagged_supported) |
| 2266 | scsi_activate_tcq(sdev, csio_lun_qdepth); |
| 2267 | else |
| 2268 | scsi_deactivate_tcq(sdev, csio_lun_qdepth); |
| 2269 | |
| 2270 | return 0; |
| 2271 | } |
| 2272 | |
| 2273 | static void |
| 2274 | csio_slave_destroy(struct scsi_device *sdev) |
| 2275 | { |
| 2276 | sdev->hostdata = NULL; |
| 2277 | } |
| 2278 | |
| 2279 | static int |
| 2280 | csio_scan_finished(struct Scsi_Host *shost, unsigned long time) |
| 2281 | { |
| 2282 | struct csio_lnode *ln = shost_priv(shost); |
| 2283 | int rv = 1; |
| 2284 | |
| 2285 | spin_lock_irq(shost->host_lock); |
| 2286 | if (!ln->hwp || csio_list_deleted(&ln->sm.sm_list)) |
| 2287 | goto out; |
| 2288 | |
| 2289 | rv = csio_scan_done(ln, jiffies, time, csio_max_scan_tmo * HZ, |
| 2290 | csio_delta_scan_tmo * HZ); |
| 2291 | out: |
| 2292 | spin_unlock_irq(shost->host_lock); |
| 2293 | |
| 2294 | return rv; |
| 2295 | } |
| 2296 | |
| 2297 | struct scsi_host_template csio_fcoe_shost_template = { |
| 2298 | .module = THIS_MODULE, |
| 2299 | .name = CSIO_DRV_DESC, |
| 2300 | .proc_name = KBUILD_MODNAME, |
| 2301 | .queuecommand = csio_queuecommand, |
| 2302 | .eh_abort_handler = csio_eh_abort_handler, |
| 2303 | .eh_device_reset_handler = csio_eh_lun_reset_handler, |
| 2304 | .slave_alloc = csio_slave_alloc, |
| 2305 | .slave_configure = csio_slave_configure, |
| 2306 | .slave_destroy = csio_slave_destroy, |
| 2307 | .scan_finished = csio_scan_finished, |
| 2308 | .this_id = -1, |
| 2309 | .sg_tablesize = CSIO_SCSI_MAX_SGE, |
| 2310 | .cmd_per_lun = CSIO_MAX_CMD_PER_LUN, |
| 2311 | .use_clustering = ENABLE_CLUSTERING, |
| 2312 | .shost_attrs = csio_fcoe_lport_attrs, |
| 2313 | .max_sectors = CSIO_MAX_SECTOR_SIZE, |
| 2314 | }; |
| 2315 | |
| 2316 | struct scsi_host_template csio_fcoe_shost_vport_template = { |
| 2317 | .module = THIS_MODULE, |
| 2318 | .name = CSIO_DRV_DESC, |
| 2319 | .proc_name = KBUILD_MODNAME, |
| 2320 | .queuecommand = csio_queuecommand, |
| 2321 | .eh_abort_handler = csio_eh_abort_handler, |
| 2322 | .eh_device_reset_handler = csio_eh_lun_reset_handler, |
| 2323 | .slave_alloc = csio_slave_alloc, |
| 2324 | .slave_configure = csio_slave_configure, |
| 2325 | .slave_destroy = csio_slave_destroy, |
| 2326 | .scan_finished = csio_scan_finished, |
| 2327 | .this_id = -1, |
| 2328 | .sg_tablesize = CSIO_SCSI_MAX_SGE, |
| 2329 | .cmd_per_lun = CSIO_MAX_CMD_PER_LUN, |
| 2330 | .use_clustering = ENABLE_CLUSTERING, |
| 2331 | .shost_attrs = csio_fcoe_vport_attrs, |
| 2332 | .max_sectors = CSIO_MAX_SECTOR_SIZE, |
| 2333 | }; |
| 2334 | |
| 2335 | /* |
| 2336 | * csio_scsi_alloc_ddp_bufs - Allocate buffers for DDP of unaligned SGLs. |
| 2337 | * @scm: SCSI Module |
| 2338 | * @hw: HW device. |
| 2339 | * @buf_size: buffer size |
| 2340 | * @num_buf : Number of buffers. |
| 2341 | * |
| 2342 | * This routine allocates DMA buffers required for SCSI Data xfer, if |
| 2343 | * each SGL buffer for a SCSI Read request posted by SCSI midlayer are |
| 2344 | * not virtually contiguous. |
| 2345 | */ |
| 2346 | static int |
| 2347 | csio_scsi_alloc_ddp_bufs(struct csio_scsim *scm, struct csio_hw *hw, |
| 2348 | int buf_size, int num_buf) |
| 2349 | { |
| 2350 | int n = 0; |
| 2351 | struct list_head *tmp; |
| 2352 | struct csio_dma_buf *ddp_desc = NULL; |
| 2353 | uint32_t unit_size = 0; |
| 2354 | |
| 2355 | if (!num_buf) |
| 2356 | return 0; |
| 2357 | |
| 2358 | if (!buf_size) |
| 2359 | return -EINVAL; |
| 2360 | |
| 2361 | INIT_LIST_HEAD(&scm->ddp_freelist); |
| 2362 | |
| 2363 | /* Align buf size to page size */ |
| 2364 | buf_size = (buf_size + PAGE_SIZE - 1) & PAGE_MASK; |
| 2365 | /* Initialize dma descriptors */ |
| 2366 | for (n = 0; n < num_buf; n++) { |
| 2367 | /* Set unit size to request size */ |
| 2368 | unit_size = buf_size; |
| 2369 | ddp_desc = kzalloc(sizeof(struct csio_dma_buf), GFP_KERNEL); |
| 2370 | if (!ddp_desc) { |
| 2371 | csio_err(hw, |
| 2372 | "Failed to allocate ddp descriptors," |
| 2373 | " Num allocated = %d.\n", |
| 2374 | scm->stats.n_free_ddp); |
| 2375 | goto no_mem; |
| 2376 | } |
| 2377 | |
| 2378 | /* Allocate Dma buffers for DDP */ |
| 2379 | ddp_desc->vaddr = pci_alloc_consistent(hw->pdev, unit_size, |
| 2380 | &ddp_desc->paddr); |
| 2381 | if (!ddp_desc->vaddr) { |
| 2382 | csio_err(hw, |
| 2383 | "SCSI response DMA buffer (ddp) allocation" |
| 2384 | " failed!\n"); |
| 2385 | kfree(ddp_desc); |
| 2386 | goto no_mem; |
| 2387 | } |
| 2388 | |
| 2389 | ddp_desc->len = unit_size; |
| 2390 | |
| 2391 | /* Added it to scsi ddp freelist */ |
| 2392 | list_add_tail(&ddp_desc->list, &scm->ddp_freelist); |
| 2393 | CSIO_INC_STATS(scm, n_free_ddp); |
| 2394 | } |
| 2395 | |
| 2396 | return 0; |
| 2397 | no_mem: |
| 2398 | /* release dma descs back to freelist and free dma memory */ |
| 2399 | list_for_each(tmp, &scm->ddp_freelist) { |
| 2400 | ddp_desc = (struct csio_dma_buf *) tmp; |
| 2401 | tmp = csio_list_prev(tmp); |
| 2402 | pci_free_consistent(hw->pdev, ddp_desc->len, ddp_desc->vaddr, |
| 2403 | ddp_desc->paddr); |
| 2404 | list_del_init(&ddp_desc->list); |
| 2405 | kfree(ddp_desc); |
| 2406 | } |
| 2407 | scm->stats.n_free_ddp = 0; |
| 2408 | |
| 2409 | return -ENOMEM; |
| 2410 | } |
| 2411 | |
| 2412 | /* |
| 2413 | * csio_scsi_free_ddp_bufs - free DDP buffers of unaligned SGLs. |
| 2414 | * @scm: SCSI Module |
| 2415 | * @hw: HW device. |
| 2416 | * |
| 2417 | * This routine frees ddp buffers. |
| 2418 | */ |
| 2419 | static void |
| 2420 | csio_scsi_free_ddp_bufs(struct csio_scsim *scm, struct csio_hw *hw) |
| 2421 | { |
| 2422 | struct list_head *tmp; |
| 2423 | struct csio_dma_buf *ddp_desc; |
| 2424 | |
| 2425 | /* release dma descs back to freelist and free dma memory */ |
| 2426 | list_for_each(tmp, &scm->ddp_freelist) { |
| 2427 | ddp_desc = (struct csio_dma_buf *) tmp; |
| 2428 | tmp = csio_list_prev(tmp); |
| 2429 | pci_free_consistent(hw->pdev, ddp_desc->len, ddp_desc->vaddr, |
| 2430 | ddp_desc->paddr); |
| 2431 | list_del_init(&ddp_desc->list); |
| 2432 | kfree(ddp_desc); |
| 2433 | } |
| 2434 | scm->stats.n_free_ddp = 0; |
| 2435 | } |
| 2436 | |
| 2437 | /** |
| 2438 | * csio_scsim_init - Initialize SCSI Module |
| 2439 | * @scm: SCSI Module |
| 2440 | * @hw: HW module |
| 2441 | * |
| 2442 | */ |
| 2443 | int |
| 2444 | csio_scsim_init(struct csio_scsim *scm, struct csio_hw *hw) |
| 2445 | { |
| 2446 | int i; |
| 2447 | struct csio_ioreq *ioreq; |
| 2448 | struct csio_dma_buf *dma_buf; |
| 2449 | |
| 2450 | INIT_LIST_HEAD(&scm->active_q); |
| 2451 | scm->hw = hw; |
| 2452 | |
| 2453 | scm->proto_cmd_len = sizeof(struct fcp_cmnd); |
| 2454 | scm->proto_rsp_len = CSIO_SCSI_RSP_LEN; |
| 2455 | scm->max_sge = CSIO_SCSI_MAX_SGE; |
| 2456 | |
| 2457 | spin_lock_init(&scm->freelist_lock); |
| 2458 | |
| 2459 | /* Pre-allocate ioreqs and initialize them */ |
| 2460 | INIT_LIST_HEAD(&scm->ioreq_freelist); |
| 2461 | for (i = 0; i < csio_scsi_ioreqs; i++) { |
| 2462 | |
| 2463 | ioreq = kzalloc(sizeof(struct csio_ioreq), GFP_KERNEL); |
| 2464 | if (!ioreq) { |
| 2465 | csio_err(hw, |
| 2466 | "I/O request element allocation failed, " |
| 2467 | " Num allocated = %d.\n", |
| 2468 | scm->stats.n_free_ioreq); |
| 2469 | |
| 2470 | goto free_ioreq; |
| 2471 | } |
| 2472 | |
| 2473 | /* Allocate Dma buffers for Response Payload */ |
| 2474 | dma_buf = &ioreq->dma_buf; |
| 2475 | dma_buf->vaddr = pci_pool_alloc(hw->scsi_pci_pool, GFP_KERNEL, |
| 2476 | &dma_buf->paddr); |
| 2477 | if (!dma_buf->vaddr) { |
| 2478 | csio_err(hw, |
| 2479 | "SCSI response DMA buffer allocation" |
| 2480 | " failed!\n"); |
| 2481 | kfree(ioreq); |
| 2482 | goto free_ioreq; |
| 2483 | } |
| 2484 | |
| 2485 | dma_buf->len = scm->proto_rsp_len; |
| 2486 | |
| 2487 | /* Set state to uninit */ |
| 2488 | csio_init_state(&ioreq->sm, csio_scsis_uninit); |
| 2489 | INIT_LIST_HEAD(&ioreq->gen_list); |
| 2490 | init_completion(&ioreq->cmplobj); |
| 2491 | |
| 2492 | list_add_tail(&ioreq->sm.sm_list, &scm->ioreq_freelist); |
| 2493 | CSIO_INC_STATS(scm, n_free_ioreq); |
| 2494 | } |
| 2495 | |
| 2496 | if (csio_scsi_alloc_ddp_bufs(scm, hw, PAGE_SIZE, csio_ddp_descs)) |
| 2497 | goto free_ioreq; |
| 2498 | |
| 2499 | return 0; |
| 2500 | |
| 2501 | free_ioreq: |
| 2502 | /* |
| 2503 | * Free up existing allocations, since an error |
| 2504 | * from here means we are returning for good |
| 2505 | */ |
| 2506 | while (!list_empty(&scm->ioreq_freelist)) { |
| 2507 | struct csio_sm *tmp; |
| 2508 | |
| 2509 | tmp = list_first_entry(&scm->ioreq_freelist, |
| 2510 | struct csio_sm, sm_list); |
| 2511 | list_del_init(&tmp->sm_list); |
| 2512 | ioreq = (struct csio_ioreq *)tmp; |
| 2513 | |
| 2514 | dma_buf = &ioreq->dma_buf; |
| 2515 | pci_pool_free(hw->scsi_pci_pool, dma_buf->vaddr, |
| 2516 | dma_buf->paddr); |
| 2517 | |
| 2518 | kfree(ioreq); |
| 2519 | } |
| 2520 | |
| 2521 | scm->stats.n_free_ioreq = 0; |
| 2522 | |
| 2523 | return -ENOMEM; |
| 2524 | } |
| 2525 | |
| 2526 | /** |
| 2527 | * csio_scsim_exit: Uninitialize SCSI Module |
| 2528 | * @scm: SCSI Module |
| 2529 | * |
| 2530 | */ |
| 2531 | void |
| 2532 | csio_scsim_exit(struct csio_scsim *scm) |
| 2533 | { |
| 2534 | struct csio_ioreq *ioreq; |
| 2535 | struct csio_dma_buf *dma_buf; |
| 2536 | |
| 2537 | while (!list_empty(&scm->ioreq_freelist)) { |
| 2538 | struct csio_sm *tmp; |
| 2539 | |
| 2540 | tmp = list_first_entry(&scm->ioreq_freelist, |
| 2541 | struct csio_sm, sm_list); |
| 2542 | list_del_init(&tmp->sm_list); |
| 2543 | ioreq = (struct csio_ioreq *)tmp; |
| 2544 | |
| 2545 | dma_buf = &ioreq->dma_buf; |
| 2546 | pci_pool_free(scm->hw->scsi_pci_pool, dma_buf->vaddr, |
| 2547 | dma_buf->paddr); |
| 2548 | |
| 2549 | kfree(ioreq); |
| 2550 | } |
| 2551 | |
| 2552 | scm->stats.n_free_ioreq = 0; |
| 2553 | |
| 2554 | csio_scsi_free_ddp_bufs(scm, scm->hw); |
| 2555 | } |