Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 | /******************************************************************* * This file is part of the Emulex Linux Device Driver for * * Fibre Channel Host Bus Adapters. * * Copyright (C) 2004-2005 Emulex. All rights reserved. * * EMULEX and SLI are trademarks of Emulex. * * www.emulex.com * * Portions Copyright (C) 2004-2005 Christoph Hellwig * * * * This program is free software; you can redistribute it and/or * * modify it under the terms of version 2 of the GNU General * * Public License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful. * * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * * TO BE LEGALLY INVALID. See the GNU General Public License for * * more details, a copy of which can be found in the file COPYING * * included with this package. * *******************************************************************/ #include <linux/pci.h> #include <linux/interrupt.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_tcq.h> #include <scsi/scsi_transport_fc.h> #include "lpfc_version.h" #include "lpfc_hw.h" #include "lpfc_sli.h" #include "lpfc_disc.h" #include "lpfc_scsi.h" #include "lpfc.h" #include "lpfc_logmsg.h" #include "lpfc_crtn.h" #define LPFC_RESET_WAIT 2 #define LPFC_ABORT_WAIT 2 static inline void lpfc_block_requests(struct lpfc_hba * phba) { down(&phba->hba_can_block); scsi_block_requests(phba->host); } static inline void lpfc_unblock_requests(struct lpfc_hba * phba) { scsi_unblock_requests(phba->host); up(&phba->hba_can_block); } /* * This routine allocates a scsi buffer, which contains all the necessary * information needed to initiate a SCSI I/O. The non-DMAable buffer region * contains information to build the IOCB. The DMAable region contains * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL * and the BPL BDE is setup in the IOCB. */ static struct lpfc_scsi_buf * lpfc_new_scsi_buf(struct lpfc_hba * phba) { struct lpfc_scsi_buf *psb; struct ulp_bde64 *bpl; IOCB_t *iocb; dma_addr_t pdma_phys; uint16_t iotag; psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL); if (!psb) return NULL; memset(psb, 0, sizeof (struct lpfc_scsi_buf)); psb->scsi_hba = phba; /* * Get memory from the pci pool to map the virt space to pci bus space * for an I/O. The DMA buffer includes space for the struct fcp_cmnd, * struct fcp_rsp and the number of bde's necessary to support the * sg_tablesize. */ psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL, &psb->dma_handle); if (!psb->data) { kfree(psb); return NULL; } /* Initialize virtual ptrs to dma_buf region. */ memset(psb->data, 0, phba->cfg_sg_dma_buf_size); /* Allocate iotag for psb->cur_iocbq. */ iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq); if (iotag == 0) { pci_pool_free(phba->lpfc_scsi_dma_buf_pool, psb->data, psb->dma_handle); kfree (psb); return NULL; } psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP; psb->fcp_cmnd = psb->data; psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd); psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp); /* Initialize local short-hand pointers. */ bpl = psb->fcp_bpl; pdma_phys = psb->dma_handle; /* * The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg * list bdes. Initialize the first two and leave the rest for * queuecommand. */ bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys)); bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys)); bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd); bpl->tus.f.bdeFlags = BUFF_USE_CMND; bpl->tus.w = le32_to_cpu(bpl->tus.w); bpl++; /* Setup the physical region for the FCP RSP */ pdma_phys += sizeof (struct fcp_cmnd); bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys)); bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys)); bpl->tus.f.bdeSize = sizeof (struct fcp_rsp); bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV); bpl->tus.w = le32_to_cpu(bpl->tus.w); /* * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf, * initialize it with all known data now. */ pdma_phys += (sizeof (struct fcp_rsp)); iocb = &psb->cur_iocbq.iocb; iocb->un.fcpi64.bdl.ulpIoTag32 = 0; iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys); iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys); iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64)); iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL; iocb->ulpBdeCount = 1; iocb->ulpClass = CLASS3; return psb; } static struct lpfc_scsi_buf* lpfc_get_scsi_buf(struct lpfc_hba * phba) { struct lpfc_scsi_buf * lpfc_cmd = NULL; struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list; unsigned long iflag = 0; spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list); spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); return lpfc_cmd; } static void lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb) { unsigned long iflag = 0; /* * There are only two special cases to consider. (1) the scsi command * requested scatter-gather usage or (2) the scsi command allocated * a request buffer, but did not request use_sg. There is a third * case, but it does not require resource deallocation. */ if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) { dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer, psb->seg_cnt, psb->pCmd->sc_data_direction); } else { if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) { dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys, psb->pCmd->request_bufflen, psb->pCmd->sc_data_direction); } } spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag); psb->pCmd = NULL; list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list); spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag); } static int lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd) { struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; struct scatterlist *sgel = NULL; struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl; IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; dma_addr_t physaddr; uint32_t i, num_bde = 0; int datadir = scsi_cmnd->sc_data_direction; int dma_error; /* * There are three possibilities here - use scatter-gather segment, use * the single mapping, or neither. Start the lpfc command prep by * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first * data bde entry. */ bpl += 2; if (scsi_cmnd->use_sg) { /* * The driver stores the segment count returned from pci_map_sg * because this a count of dma-mappings used to map the use_sg * pages. They are not guaranteed to be the same for those * architectures that implement an IOMMU. */ sgel = (struct scatterlist *)scsi_cmnd->request_buffer; lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel, scsi_cmnd->use_sg, datadir); if (lpfc_cmd->seg_cnt == 0) return 1; if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { printk(KERN_ERR "%s: Too many sg segments from " "dma_map_sg. Config %d, seg_cnt %d", __FUNCTION__, phba->cfg_sg_seg_cnt, lpfc_cmd->seg_cnt); dma_unmap_sg(&phba->pcidev->dev, sgel, lpfc_cmd->seg_cnt, datadir); return 1; } /* * The driver established a maximum scatter-gather segment count * during probe that limits the number of sg elements in any * single scsi command. Just run through the seg_cnt and format * the bde's. */ for (i = 0; i < lpfc_cmd->seg_cnt; i++) { physaddr = sg_dma_address(sgel); bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); bpl->tus.f.bdeSize = sg_dma_len(sgel); if (datadir == DMA_TO_DEVICE) bpl->tus.f.bdeFlags = 0; else bpl->tus.f.bdeFlags = BUFF_USE_RCV; bpl->tus.w = le32_to_cpu(bpl->tus.w); bpl++; sgel++; num_bde++; } } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) { physaddr = dma_map_single(&phba->pcidev->dev, scsi_cmnd->request_buffer, scsi_cmnd->request_bufflen, datadir); dma_error = dma_mapping_error(physaddr); if (dma_error) { lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0718 Unable to dma_map_single " "request_buffer: x%x\n", phba->brd_no, dma_error); return 1; } lpfc_cmd->nonsg_phys = physaddr; bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen; if (datadir == DMA_TO_DEVICE) bpl->tus.f.bdeFlags = 0; else bpl->tus.f.bdeFlags = BUFF_USE_RCV; bpl->tus.w = le32_to_cpu(bpl->tus.w); num_bde = 1; bpl++; } /* * Finish initializing those IOCB fields that are dependent on the * scsi_cmnd request_buffer. Note that the bdeSize is explicitly * reinitialized since all iocb memory resources are used many times * for transmit, receive, and continuation bpl's. */ iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64)); iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof (struct ulp_bde64)); iocb_cmd->ulpBdeCount = 1; iocb_cmd->ulpLe = 1; fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen); return 0; } static void lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd) { struct scsi_cmnd *cmnd = lpfc_cmd->pCmd; struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd; struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp; struct lpfc_hba *phba = lpfc_cmd->scsi_hba; uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm; uint32_t resp_info = fcprsp->rspStatus2; uint32_t scsi_status = fcprsp->rspStatus3; uint32_t host_status = DID_OK; uint32_t rsplen = 0; /* * If this is a task management command, there is no * scsi packet associated with this lpfc_cmd. The driver * consumes it. */ if (fcpcmd->fcpCntl2) { scsi_status = 0; goto out; } lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, "%d:0730 FCP command failed: RSP " "Data: x%x x%x x%x x%x x%x x%x\n", phba->brd_no, resp_info, scsi_status, be32_to_cpu(fcprsp->rspResId), be32_to_cpu(fcprsp->rspSnsLen), be32_to_cpu(fcprsp->rspRspLen), fcprsp->rspInfo3); if (resp_info & RSP_LEN_VALID) { rsplen = be32_to_cpu(fcprsp->rspRspLen); if ((rsplen != 0 && rsplen != 4 && rsplen != 8) || (fcprsp->rspInfo3 != RSP_NO_FAILURE)) { host_status = DID_ERROR; goto out; } } if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) { uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen); if (snslen > SCSI_SENSE_BUFFERSIZE) snslen = SCSI_SENSE_BUFFERSIZE; memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen); } cmnd->resid = 0; if (resp_info & RESID_UNDER) { cmnd->resid = be32_to_cpu(fcprsp->rspResId); lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d:0716 FCP Read Underrun, expected %d, " "residual %d Data: x%x x%x x%x\n", phba->brd_no, be32_to_cpu(fcpcmd->fcpDl), cmnd->resid, fcpi_parm, cmnd->cmnd[0], cmnd->underflow); /* * The cmnd->underflow is the minimum number of bytes that must * be transfered for this command. Provided a sense condition * is not present, make sure the actual amount transferred is at * least the underflow value or fail. */ if (!(resp_info & SNS_LEN_VALID) && (scsi_status == SAM_STAT_GOOD) && (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) { lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d:0717 FCP command x%x residual " "underrun converted to error " "Data: x%x x%x x%x\n", phba->brd_no, cmnd->cmnd[0], cmnd->request_bufflen, cmnd->resid, cmnd->underflow); host_status = DID_ERROR; } } else if (resp_info & RESID_OVER) { lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, "%d:0720 FCP command x%x residual " "overrun error. Data: x%x x%x \n", phba->brd_no, cmnd->cmnd[0], cmnd->request_bufflen, cmnd->resid); host_status = DID_ERROR; /* * Check SLI validation that all the transfer was actually done * (fcpi_parm should be zero). Apply check only to reads. */ } else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) { lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, "%d:0734 FCP Read Check Error Data: " "x%x x%x x%x x%x\n", phba->brd_no, be32_to_cpu(fcpcmd->fcpDl), be32_to_cpu(fcprsp->rspResId), fcpi_parm, cmnd->cmnd[0]); host_status = DID_ERROR; cmnd->resid = cmnd->request_bufflen; } out: cmnd->result = ScsiResult(host_status, scsi_status); } static void lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn, struct lpfc_iocbq *pIocbOut) { struct lpfc_scsi_buf *lpfc_cmd = (struct lpfc_scsi_buf *) pIocbIn->context1; struct lpfc_rport_data *rdata = lpfc_cmd->rdata; struct lpfc_nodelist *pnode = rdata->pnode; struct scsi_cmnd *cmd = lpfc_cmd->pCmd; int result; struct scsi_device *sdev, *tmp_sdev; int depth = 0; lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; lpfc_cmd->status = pIocbOut->iocb.ulpStatus; if (lpfc_cmd->status) { if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && (lpfc_cmd->result & IOERR_DRVR_MASK)) lpfc_cmd->status = IOSTAT_DRIVER_REJECT; else if (lpfc_cmd->status >= IOSTAT_CNT) lpfc_cmd->status = IOSTAT_DEFAULT; lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, "%d:0729 FCP cmd x%x failed <%d/%d> status: " "x%x result: x%x Data: x%x x%x\n", phba->brd_no, cmd->cmnd[0], cmd->device->id, cmd->device->lun, lpfc_cmd->status, lpfc_cmd->result, pIocbOut->iocb.ulpContext, lpfc_cmd->cur_iocbq.iocb.ulpIoTag); switch (lpfc_cmd->status) { case IOSTAT_FCP_RSP_ERROR: /* Call FCP RSP handler to determine result */ lpfc_handle_fcp_err(lpfc_cmd); break; case IOSTAT_NPORT_BSY: case IOSTAT_FABRIC_BSY: cmd->result = ScsiResult(DID_BUS_BUSY, 0); break; default: cmd->result = ScsiResult(DID_ERROR, 0); break; } if ((pnode == NULL ) || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY); } else { cmd->result = ScsiResult(DID_OK, 0); } if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { uint32_t *lp = (uint32_t *)cmd->sense_buffer; lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d:0710 Iodone <%d/%d> cmd %p, error x%x " "SNS x%x x%x Data: x%x x%x\n", phba->brd_no, cmd->device->id, cmd->device->lun, cmd, cmd->result, *lp, *(lp + 3), cmd->retries, cmd->resid); } result = cmd->result; sdev = cmd->device; cmd->scsi_done(cmd); if (!result && ((jiffies - pnode->last_ramp_up_time) > LPFC_Q_RAMP_UP_INTERVAL * HZ) && ((jiffies - pnode->last_q_full_time) > LPFC_Q_RAMP_UP_INTERVAL * HZ) && (phba->cfg_lun_queue_depth > sdev->queue_depth)) { shost_for_each_device(tmp_sdev, sdev->host) { if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) { if (tmp_sdev->id != sdev->id) continue; if (tmp_sdev->ordered_tags) scsi_adjust_queue_depth(tmp_sdev, MSG_ORDERED_TAG, tmp_sdev->queue_depth+1); else scsi_adjust_queue_depth(tmp_sdev, MSG_SIMPLE_TAG, tmp_sdev->queue_depth+1); pnode->last_ramp_up_time = jiffies; } } } /* * Check for queue full. If the lun is reporting queue full, then * back off the lun queue depth to prevent target overloads. */ if (result == SAM_STAT_TASK_SET_FULL) { pnode->last_q_full_time = jiffies; shost_for_each_device(tmp_sdev, sdev->host) { if (tmp_sdev->id != sdev->id) continue; depth = scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1); } /* * The queue depth cannot be lowered any more. * Modify the returned error code to store * the final depth value set by * scsi_track_queue_full. */ if (depth == -1) depth = sdev->host->cmd_per_lun; if (depth) { lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, "%d:0711 detected queue full - lun queue depth " " adjusted to %d.\n", phba->brd_no, depth); } } lpfc_release_scsi_buf(phba, lpfc_cmd); } static void lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_nodelist *pnode) { struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); int datadir = scsi_cmnd->sc_data_direction; lpfc_cmd->fcp_rsp->rspSnsLen = 0; /* clear task management bits */ lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; int_to_scsilun(lpfc_cmd->pCmd->device->lun, &lpfc_cmd->fcp_cmnd->fcp_lun); memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16); if (scsi_cmnd->device->tagged_supported) { switch (scsi_cmnd->tag) { case HEAD_OF_QUEUE_TAG: fcp_cmnd->fcpCntl1 = HEAD_OF_Q; break; case ORDERED_QUEUE_TAG: fcp_cmnd->fcpCntl1 = ORDERED_Q; break; default: fcp_cmnd->fcpCntl1 = SIMPLE_Q; break; } } else fcp_cmnd->fcpCntl1 = 0; /* * There are three possibilities here - use scatter-gather segment, use * the single mapping, or neither. Start the lpfc command prep by * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first * data bde entry. */ if (scsi_cmnd->use_sg) { if (datadir == DMA_TO_DEVICE) { iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; iocb_cmd->un.fcpi.fcpi_parm = 0; iocb_cmd->ulpPU = 0; fcp_cmnd->fcpCntl3 = WRITE_DATA; phba->fc4OutputRequests++; } else { iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; iocb_cmd->ulpPU = PARM_READ_CHECK; iocb_cmd->un.fcpi.fcpi_parm = scsi_cmnd->request_bufflen; fcp_cmnd->fcpCntl3 = READ_DATA; phba->fc4InputRequests++; } } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) { if (datadir == DMA_TO_DEVICE) { iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; iocb_cmd->un.fcpi.fcpi_parm = 0; iocb_cmd->ulpPU = 0; fcp_cmnd->fcpCntl3 = WRITE_DATA; phba->fc4OutputRequests++; } else { iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; iocb_cmd->ulpPU = PARM_READ_CHECK; iocb_cmd->un.fcpi.fcpi_parm = scsi_cmnd->request_bufflen; fcp_cmnd->fcpCntl3 = READ_DATA; phba->fc4InputRequests++; } } else { iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; iocb_cmd->un.fcpi.fcpi_parm = 0; iocb_cmd->ulpPU = 0; fcp_cmnd->fcpCntl3 = 0; phba->fc4ControlRequests++; } /* * Finish initializing those IOCB fields that are independent * of the scsi_cmnd request_buffer */ piocbq->iocb.ulpContext = pnode->nlp_rpi; if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) piocbq->iocb.ulpFCP2Rcvy = 1; piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); piocbq->context1 = lpfc_cmd; piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; } static int lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd, uint8_t task_mgmt_cmd) { struct lpfc_sli *psli; struct lpfc_iocbq *piocbq; IOCB_t *piocb; struct fcp_cmnd *fcp_cmnd; struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device; struct lpfc_rport_data *rdata = scsi_dev->hostdata; struct lpfc_nodelist *ndlp = rdata->pnode; if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) { return 0; } psli = &phba->sli; piocbq = &(lpfc_cmd->cur_iocbq); piocb = &piocbq->iocb; fcp_cmnd = lpfc_cmd->fcp_cmnd; int_to_scsilun(lpfc_cmd->pCmd->device->lun, &lpfc_cmd->fcp_cmnd->fcp_lun); fcp_cmnd->fcpCntl2 = task_mgmt_cmd; piocb->ulpCommand = CMD_FCP_ICMND64_CR; piocb->ulpContext = ndlp->nlp_rpi; if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) { piocb->ulpFCP2Rcvy = 1; } piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f); /* ulpTimeout is only one byte */ if (lpfc_cmd->timeout > 0xff) { /* * Do not timeout the command at the firmware level. * The driver will provide the timeout mechanism. */ piocb->ulpTimeout = 0; } else { piocb->ulpTimeout = lpfc_cmd->timeout; } lpfc_cmd->rdata = rdata; switch (task_mgmt_cmd) { case FCP_LUN_RESET: /* Issue LUN Reset to TGT <num> LUN <num> */ lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d:0703 Issue LUN Reset to TGT %d LUN %d " "Data: x%x x%x\n", phba->brd_no, scsi_dev->id, scsi_dev->lun, ndlp->nlp_rpi, ndlp->nlp_flag); break; case FCP_ABORT_TASK_SET: /* Issue Abort Task Set to TGT <num> LUN <num> */ lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d:0701 Issue Abort Task Set to TGT %d LUN %d " "Data: x%x x%x\n", phba->brd_no, scsi_dev->id, scsi_dev->lun, ndlp->nlp_rpi, ndlp->nlp_flag); break; case FCP_TARGET_RESET: /* Issue Target Reset to TGT <num> */ lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d:0702 Issue Target Reset to TGT %d " "Data: x%x x%x\n", phba->brd_no, scsi_dev->id, ndlp->nlp_rpi, ndlp->nlp_flag); break; } return (1); } static int lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba) { struct lpfc_iocbq *iocbq; struct lpfc_iocbq *iocbqrsp; int ret; ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET); if (!ret) return FAILED; lpfc_cmd->scsi_hba = phba; iocbq = &lpfc_cmd->cur_iocbq; iocbqrsp = lpfc_sli_get_iocbq(phba); if (!iocbqrsp) return FAILED; ret = lpfc_sli_issue_iocb_wait(phba, &phba->sli.ring[phba->sli.fcp_ring], iocbq, iocbqrsp, lpfc_cmd->timeout); if (ret != IOCB_SUCCESS) { lpfc_cmd->status = IOSTAT_DRIVER_REJECT; ret = FAILED; } else { ret = SUCCESS; lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4]; lpfc_cmd->status = iocbqrsp->iocb.ulpStatus; if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && (lpfc_cmd->result & IOERR_DRVR_MASK)) lpfc_cmd->status = IOSTAT_DRIVER_REJECT; } lpfc_sli_release_iocbq(phba, iocbqrsp); return ret; } const char * lpfc_info(struct Scsi_Host *host) { struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata[0]; int len; static char lpfcinfobuf[384]; memset(lpfcinfobuf,0,384); if (phba && phba->pcidev){ strncpy(lpfcinfobuf, phba->ModelDesc, 256); len = strlen(lpfcinfobuf); snprintf(lpfcinfobuf + len, 384-len, " on PCI bus %02x device %02x irq %d", phba->pcidev->bus->number, phba->pcidev->devfn, phba->pcidev->irq); len = strlen(lpfcinfobuf); if (phba->Port[0]) { snprintf(lpfcinfobuf + len, 384-len, " port %s", phba->Port); } } return lpfcinfobuf; } static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba) { unsigned long poll_tmo_expires = (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo)); if (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt) mod_timer(&phba->fcp_poll_timer, poll_tmo_expires); } void lpfc_poll_start_timer(struct lpfc_hba * phba) { lpfc_poll_rearm_timer(phba); } void lpfc_poll_timeout(unsigned long ptr) { struct lpfc_hba *phba = (struct lpfc_hba *)ptr; unsigned long iflag; spin_lock_irqsave(phba->host->host_lock, iflag); if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { lpfc_sli_poll_fcp_ring (phba); if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_poll_rearm_timer(phba); } spin_unlock_irqrestore(phba->host->host_lock, iflag); } static int lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) { struct lpfc_hba *phba = (struct lpfc_hba *) cmnd->device->host->hostdata[0]; struct lpfc_sli *psli = &phba->sli; struct lpfc_rport_data *rdata = cmnd->device->hostdata; struct lpfc_nodelist *ndlp = rdata->pnode; struct lpfc_scsi_buf *lpfc_cmd; struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); int err; err = fc_remote_port_chkready(rport); if (err) { cmnd->result = err; goto out_fail_command; } /* * Catch race where our node has transitioned, but the * transport is still transitioning. */ if (!ndlp) { cmnd->result = ScsiResult(DID_BUS_BUSY, 0); goto out_fail_command; } lpfc_cmd = lpfc_get_scsi_buf (phba); if (lpfc_cmd == NULL) { lpfc_printf_log(phba, KERN_INFO, LOG_FCP, "%d:0707 driver's buffer pool is empty, " "IO busied\n", phba->brd_no); goto out_host_busy; } /* * Store the midlayer's command structure for the completion phase * and complete the command initialization. */ lpfc_cmd->pCmd = cmnd; lpfc_cmd->rdata = rdata; lpfc_cmd->timeout = 0; cmnd->host_scribble = (unsigned char *)lpfc_cmd; cmnd->scsi_done = done; err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd); if (err) goto out_host_busy_free_buf; lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp); err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring], &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB); if (err) goto out_host_busy_free_buf; if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { lpfc_sli_poll_fcp_ring(phba); if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_poll_rearm_timer(phba); } return 0; out_host_busy_free_buf: lpfc_release_scsi_buf(phba, lpfc_cmd); out_host_busy: return SCSI_MLQUEUE_HOST_BUSY; out_fail_command: done(cmnd); return 0; } static int lpfc_abort_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring]; struct lpfc_iocbq *iocb; struct lpfc_iocbq *abtsiocb; struct lpfc_scsi_buf *lpfc_cmd; IOCB_t *cmd, *icmd; unsigned int loop_count = 0; int ret = SUCCESS; lpfc_block_requests(phba); spin_lock_irq(shost->host_lock); lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble; BUG_ON(!lpfc_cmd); /* * If pCmd field of the corresponding lpfc_scsi_buf structure * points to a different SCSI command, then the driver has * already completed this command, but the midlayer did not * see the completion before the eh fired. Just return * SUCCESS. */ iocb = &lpfc_cmd->cur_iocbq; if (lpfc_cmd->pCmd != cmnd) goto out; BUG_ON(iocb->context1 != lpfc_cmd); abtsiocb = lpfc_sli_get_iocbq(phba); if (abtsiocb == NULL) { ret = FAILED; goto out; } /* * The scsi command can not be in txq and it is in flight because the * pCmd is still pointig at the SCSI command we have to abort. There * is no need to search the txcmplq. Just send an abort to the FW. */ cmd = &iocb->iocb; icmd = &abtsiocb->iocb; icmd->un.acxri.abortType = ABORT_TYPE_ABTS; icmd->un.acxri.abortContextTag = cmd->ulpContext; icmd->un.acxri.abortIoTag = cmd->ulpIoTag; icmd->ulpLe = 1; icmd->ulpClass = cmd->ulpClass; if (phba->hba_state >= LPFC_LINK_UP) icmd->ulpCommand = CMD_ABORT_XRI_CN; else icmd->ulpCommand = CMD_CLOSE_XRI_CN; abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) { lpfc_sli_release_iocbq(phba, abtsiocb); ret = FAILED; goto out; } if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_sli_poll_fcp_ring (phba); /* Wait for abort to complete */ while (lpfc_cmd->pCmd == cmnd) { if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_sli_poll_fcp_ring (phba); spin_unlock_irq(phba->host->host_lock); schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ); spin_lock_irq(phba->host->host_lock); if (++loop_count > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT) break; } if (lpfc_cmd->pCmd == cmnd) { ret = FAILED; lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0748 abort handler timed out waiting for " "abort to complete: ret %#x, ID %d, LUN %d, " "snum %#lx\n", phba->brd_no, ret, cmnd->device->id, cmnd->device->lun, cmnd->serial_number); } out: lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, "%d:0749 SCSI Layer I/O Abort Request " "Status x%x ID %d LUN %d snum %#lx\n", phba->brd_no, ret, cmnd->device->id, cmnd->device->lun, cmnd->serial_number); spin_unlock_irq(shost->host_lock); lpfc_unblock_requests(phba); return ret; } static int lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; struct lpfc_scsi_buf *lpfc_cmd; struct lpfc_iocbq *iocbq, *iocbqrsp; struct lpfc_rport_data *rdata = cmnd->device->hostdata; struct lpfc_nodelist *pnode = rdata->pnode; uint32_t cmd_result = 0, cmd_status = 0; int ret = FAILED; int cnt, loopcnt; lpfc_block_requests(phba); spin_lock_irq(shost->host_lock); /* * If target is not in a MAPPED state, delay the reset until * target is rediscovered or nodev timeout expires. */ while ( 1 ) { if (!pnode) break; if (pnode->nlp_state != NLP_STE_MAPPED_NODE) { spin_unlock_irq(phba->host->host_lock); schedule_timeout_uninterruptible(msecs_to_jiffies(500)); spin_lock_irq(phba->host->host_lock); } if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE)) break; } lpfc_cmd = lpfc_get_scsi_buf (phba); if (lpfc_cmd == NULL) goto out; lpfc_cmd->pCmd = cmnd; lpfc_cmd->timeout = 60; lpfc_cmd->scsi_hba = phba; ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET); if (!ret) goto out_free_scsi_buf; iocbq = &lpfc_cmd->cur_iocbq; /* get a buffer for this IOCB command response */ iocbqrsp = lpfc_sli_get_iocbq(phba); if (iocbqrsp == NULL) goto out_free_scsi_buf; ret = lpfc_sli_issue_iocb_wait(phba, &phba->sli.ring[phba->sli.fcp_ring], iocbq, iocbqrsp, lpfc_cmd->timeout); if (ret == IOCB_SUCCESS) ret = SUCCESS; cmd_result = iocbqrsp->iocb.un.ulpWord[4]; cmd_status = iocbqrsp->iocb.ulpStatus; lpfc_sli_release_iocbq(phba, iocbqrsp); lpfc_release_scsi_buf(phba, lpfc_cmd); /* * All outstanding txcmplq I/Os should have been aborted by the device. * Unfortunately, some targets do not abide by this forcing the driver * to double check. */ cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], cmnd->device->id, cmnd->device->lun, LPFC_CTX_LUN); if (cnt) lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], cmnd->device->id, cmnd->device->lun, 0, LPFC_CTX_LUN); loopcnt = 0; while(cnt) { spin_unlock_irq(phba->host->host_lock); schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); spin_lock_irq(phba->host->host_lock); if (++loopcnt > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) break; cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], cmnd->device->id, cmnd->device->lun, LPFC_CTX_LUN); } if (cnt) { lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0719 LUN Reset I/O flush failure: cnt x%x\n", phba->brd_no, cnt); ret = FAILED; } out_free_scsi_buf: lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0713 SCSI layer issued LUN reset (%d, %d) " "Data: x%x x%x x%x\n", phba->brd_no, cmnd->device->id,cmnd->device->lun, ret, cmd_status, cmd_result); out: spin_unlock_irq(shost->host_lock); lpfc_unblock_requests(phba); return ret; } static int lpfc_reset_bus_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; struct lpfc_nodelist *ndlp = NULL; int match; int ret = FAILED, i, err_count = 0; int cnt, loopcnt; unsigned int midlayer_id = 0; struct lpfc_scsi_buf * lpfc_cmd; lpfc_block_requests(phba); spin_lock_irq(shost->host_lock); lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd == NULL) goto out; /* The lpfc_cmd storage is reused. Set all loop invariants. */ lpfc_cmd->timeout = 60; lpfc_cmd->pCmd = cmnd; lpfc_cmd->scsi_hba = phba; /* * Since the driver manages a single bus device, reset all * targets known to the driver. Should any target reset * fail, this routine returns failure to the midlayer. */ midlayer_id = cmnd->device->id; for (i = 0; i < MAX_FCP_TARGET; i++) { /* Search the mapped list for this target ID */ match = 0; list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) { if ((i == ndlp->nlp_sid) && ndlp->rport) { match = 1; break; } } if (!match) continue; lpfc_cmd->pCmd->device->id = i; lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data; ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba); if (ret != SUCCESS) { lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0713 Bus Reset on target %d failed\n", phba->brd_no, i); err_count++; } } if (err_count == 0) ret = SUCCESS; lpfc_release_scsi_buf(phba, lpfc_cmd); /* * All outstanding txcmplq I/Os should have been aborted by * the targets. Unfortunately, some targets do not abide by * this forcing the driver to double check. */ cmnd->device->id = midlayer_id; cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], 0, 0, LPFC_CTX_HOST); if (cnt) lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0, LPFC_CTX_HOST); loopcnt = 0; while(cnt) { spin_unlock_irq(phba->host->host_lock); schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); spin_lock_irq(phba->host->host_lock); if (++loopcnt > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) break; cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], 0, 0, LPFC_CTX_HOST); } if (cnt) { lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n", phba->brd_no, cnt, i); ret = FAILED; } lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0714 SCSI layer issued Bus Reset Data: x%x\n", phba->brd_no, ret); out: spin_unlock_irq(shost->host_lock); lpfc_unblock_requests(phba); return ret; } static int lpfc_slave_alloc(struct scsi_device *sdev) { struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0]; struct lpfc_scsi_buf *scsi_buf = NULL; struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); uint32_t total = 0, i; uint32_t num_to_alloc = 0; unsigned long flags; if (!rport || fc_remote_port_chkready(rport)) return -ENXIO; sdev->hostdata = rport->dd_data; /* * Populate the cmds_per_lun count scsi_bufs into this host's globally * available list of scsi buffers. Don't allocate more than the * HBA limit conveyed to the midlayer via the host structure. The * formula accounts for the lun_queue_depth + error handlers + 1 * extra. This list of scsi bufs exists for the lifetime of the driver. */ total = phba->total_scsi_bufs; num_to_alloc = phba->cfg_lun_queue_depth + 2; if (total >= phba->cfg_hba_queue_depth) { lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, "%d:0704 At limitation of %d preallocated " "command buffers\n", phba->brd_no, total); return 0; } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) { lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, "%d:0705 Allocation request of %d command " "buffers will exceed max of %d. Reducing " "allocation request to %d.\n", phba->brd_no, num_to_alloc, phba->cfg_hba_queue_depth, (phba->cfg_hba_queue_depth - total)); num_to_alloc = phba->cfg_hba_queue_depth - total; } for (i = 0; i < num_to_alloc; i++) { scsi_buf = lpfc_new_scsi_buf(phba); if (!scsi_buf) { lpfc_printf_log(phba, KERN_ERR, LOG_FCP, "%d:0706 Failed to allocate command " "buffer\n", phba->brd_no); break; } spin_lock_irqsave(&phba->scsi_buf_list_lock, flags); phba->total_scsi_bufs++; list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list); spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags); } return 0; } static int lpfc_slave_configure(struct scsi_device *sdev) { struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0]; struct fc_rport *rport = starget_to_rport(sdev->sdev_target); if (sdev->tagged_supported) scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth); else scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth); /* * Initialize the fc transport attributes for the target * containing this scsi device. Also note that the driver's * target pointer is stored in the starget_data for the * driver's sysfs entry point functions. */ rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5; if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { lpfc_sli_poll_fcp_ring(phba); if (phba->cfg_poll & DISABLE_FCP_RING_INT) lpfc_poll_rearm_timer(phba); } return 0; } static void lpfc_slave_destroy(struct scsi_device *sdev) { sdev->hostdata = NULL; return; } struct scsi_host_template lpfc_template = { .module = THIS_MODULE, .name = LPFC_DRIVER_NAME, .info = lpfc_info, .queuecommand = lpfc_queuecommand, .eh_abort_handler = lpfc_abort_handler, .eh_device_reset_handler= lpfc_reset_lun_handler, .eh_bus_reset_handler = lpfc_reset_bus_handler, .slave_alloc = lpfc_slave_alloc, .slave_configure = lpfc_slave_configure, .slave_destroy = lpfc_slave_destroy, .this_id = -1, .sg_tablesize = LPFC_SG_SEG_CNT, .cmd_per_lun = LPFC_CMD_PER_LUN, .use_clustering = ENABLE_CLUSTERING, .shost_attrs = lpfc_host_attrs, .max_sectors = 0xFFFF, }; |