lpfc_scsi.c 36.1 KB
Newer Older
已提交
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
/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Enterprise Fibre Channel Host Bus Adapters.                     *
 * Refer to the README file included with this package for         *
 * driver version and adapter support.                             *
 * Copyright (C) 2004 Emulex Corporation.                          *
 * www.emulex.com                                                  *
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
 * modify it under the terms of the GNU General Public License     *
 * as published by the Free Software Foundation; either version 2  *
 * of the License, or (at your option) any later version.          *
 *                                                                 *
 * This program is distributed in the hope that it will be useful, *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of  *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
 * GNU General Public License for more details, a copy of which    *
 * can be found in the file COPYING included with this package.    *
 *******************************************************************/

/*
 * $Id: lpfc_scsi.c 1.37 2005/04/13 14:27:09EDT sf_support Exp  $
 */

#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_put_lun(struct fcp_cmnd *fcmd, unsigned int lun)
{
	fcmd->fcpLunLsl = 0;
	fcmd->fcpLunMsl = swab16((uint16_t)lun);
}

/*
 * 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_get_scsi_buf(struct lpfc_hba * phba)
{
	struct lpfc_scsi_buf *psb;
	struct ulp_bde64 *bpl;
	IOCB_t *iocb;
	dma_addr_t pdma_phys;

	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);

	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 void
lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
{
	struct lpfc_hba *phba = psb->scsi_hba;

	/*
	 * 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);
		 }
	}

	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
}

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;
		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
	 */
	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;
	unsigned long iflag;

	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) {
			if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
				cmd->result = ScsiResult(DID_BUS_BUSY,
					SAM_STAT_BUSY);
		}
		else {
			cmd->result = ScsiResult(DID_NO_CONNECT, 0);
		}
	} 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);
	}

	spin_lock_irqsave(phba->host->host_lock, iflag);
	lpfc_free_scsi_buf(lpfc_cmd);
	cmd->host_scribble = NULL;
	spin_unlock_irqrestore(phba->host->host_lock, iflag);

	cmd->scsi_done(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;

	lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->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 == 0) || (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;
	lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->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 = NULL;
	struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
	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;
	list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
	if (!iocbqrsp)
		return FAILED;
	memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));

	iocbq->iocb_flag |= LPFC_IO_POLL;
	ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
		     &phba->sli.ring[phba->sli.fcp_ring],
		     iocbq, SLI_IOCB_HIGH_PRIORITY,
		     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;
	}

	/*
	 * All outstanding txcmplq I/Os should have been aborted by the target.
	 * Unfortunately, some targets do not abide by this forcing the driver
	 * to double check.
	 */
	lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
			    lpfc_cmd->pCmd->device->id,
			    lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);

	/* Return response IOCB to free list. */
	list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
	return ret;
}

static void
lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
			    struct lpfc_iocbq *pIocbOut)
{
	unsigned long iflag;
	struct lpfc_scsi_buf *lpfc_cmd =
		(struct lpfc_scsi_buf *) pIocbIn->context1;

	spin_lock_irqsave(phba->host->host_lock, iflag);
	lpfc_free_scsi_buf(lpfc_cmd);
	spin_unlock_irqrestore(phba->host->host_lock, iflag);
}

static void
lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
				struct lpfc_iocbq *pIocbIn,
				struct lpfc_iocbq *pIocbOut)
{
	struct scsi_cmnd *ml_cmd =
		((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;

	lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
	ml_cmd->host_scribble = NULL;
}

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 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 = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
	int err = 0;

	/*
	 * The target pointer is guaranteed not to be NULL because the driver
	 * only clears the device->hostdata field in lpfc_slave_destroy.  This
	 * approach guarantees no further IO calls on this target.
	 */
	if (!ndlp) {
		cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
		goto out_fail_command;
	}

	/*
	 * A Fibre Channel target is present and functioning only when the node
	 * state is MAPPED.  Any other state is a failure.
	 */
	if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
		if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
		    (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
			cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
			goto out_fail_command;
		}
		/*
		 * The device is most likely recovered and the driver
		 * needs a bit more time to finish.  Ask the midlayer
		 * to retry.
		 */
		goto out_host_busy;
	}

	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
	if (lpfc_cmd == NULL) {
		printk(KERN_WARNING "%s: No buffer available - list empty, "
		       "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
		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;
	return 0;

 out_host_busy_free_buf:
	lpfc_free_scsi_buf(lpfc_cmd);
	cmnd->host_scribble = NULL;
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

 out_fail_command:
	done(cmnd);
	return 0;
}

static int
801
__lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
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
{
	struct lpfc_hba *phba =
			(struct lpfc_hba *)cmnd->device->host->hostdata[0];
	struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
	struct lpfc_iocbq *iocb, *next_iocb;
	struct lpfc_iocbq *abtsiocb = NULL;
	struct lpfc_scsi_buf *lpfc_cmd;
	struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
	IOCB_t *cmd, *icmd;
	unsigned long snum;
	unsigned int id, lun;
	unsigned int loop_count = 0;
	int ret = IOCB_SUCCESS;

	/*
	 * If the host_scribble data area is NULL, then the driver has already
	 * completed this command, but the midlayer did not see the completion
	 * before the eh fired.  Just return SUCCESS.
	 */
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
	if (!lpfc_cmd)
		return SUCCESS;

	/* save these now since lpfc_cmd can be freed */
	id   = lpfc_cmd->pCmd->device->id;
	lun  = lpfc_cmd->pCmd->device->lun;
	snum = lpfc_cmd->pCmd->serial_number;

	list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
		cmd = &iocb->iocb;
		if (iocb->context1 != lpfc_cmd)
			continue;

		list_del_init(&iocb->list);
		pring->txq_cnt--;
		if (!iocb->iocb_cmpl) {
			list_add_tail(&iocb->list, lpfc_iocb_list);
		}
		else {
			cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
			cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
			lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
		}

		goto out;
	}

	list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
	if (abtsiocb == NULL)
		return FAILED;

	memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));

	/*
	 * The scsi command was not in the txq.  Check the txcmplq and if it is
	 * found, send an abort to the FW.
	 */
	list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
		if (iocb->context1 != lpfc_cmd)
			continue;

		iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
		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;

		if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
								IOCB_ERROR) {
			list_add_tail(&abtsiocb->list, lpfc_iocb_list);
			ret = IOCB_ERROR;
			break;
		}

		/* Wait for abort to complete */
		while (cmnd->host_scribble)
		{
			spin_unlock_irq(phba->host->host_lock);
			set_current_state(TASK_UNINTERRUPTIBLE);
			schedule_timeout(LPFC_ABORT_WAIT*HZ);
			spin_lock_irq(phba->host->host_lock);
			if (++loop_count
			    > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
				break;
		}

		if(cmnd->host_scribble) {
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"%d:0748 abort handler timed "
					"out waiting for abort to "
					"complete. Data: "
					"x%x x%x x%x x%lx\n",
					phba->brd_no, ret, id, lun, snum);
			cmnd->host_scribble = NULL;
			iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
			ret = IOCB_ERROR;
		}

		break;
	}

 out:
	lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
			"%d:0749 SCSI layer issued abort device "
			"Data: x%x x%x x%x x%lx\n",
			phba->brd_no, ret, id, lun, snum);

	return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
}

920 921 922 923 924 925 926 927 928 929
static int
lpfc_abort_handler(struct scsi_cmnd *cmnd)
{
	int rc;
	spin_lock_irq(cmnd->device->host->host_lock);
	rc = __lpfc_abort_handler(cmnd);
	spin_unlock_irq(cmnd->device->host->host_lock);
	return rc;
}

已提交
930
static int
931
__lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
已提交
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
{
	struct Scsi_Host *shost = cmnd->device->host;
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_scsi_buf *lpfc_cmd = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
	struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
	struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	int ret = FAILED;
	int cnt, loopcnt;

	/*
	 * 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);
			set_current_state(TASK_UNINTERRUPTIBLE);
			schedule_timeout( HZ/2);
			spin_lock_irq(phba->host->host_lock);
		}
		if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
			break;
	}

	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
	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 */
	list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
	if (iocbqrsp == NULL)
		goto out_free_scsi_buf;

	memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));

	iocbq->iocb_flag |= LPFC_IO_POLL;
	iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;

	ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
		     &phba->sli.ring[psli->fcp_ring],
		     iocbq, 0, iocbqrsp, 60);
	if (ret == IOCB_SUCCESS)
		ret = SUCCESS;

	lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
	lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
	if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
		if (lpfc_cmd->result & IOERR_DRVR_MASK)
			lpfc_cmd->status = IOSTAT_DRIVER_REJECT;

	/*
	 * All outstanding txcmplq I/Os should have been aborted by the target.
	 * Unfortunately, some targets do not abide by this forcing the driver
	 * to double check.
	 */
	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 = lpfc_sli_sum_iocb(phba,
				       &phba->sli.ring[phba->sli.fcp_ring],
				       cmnd->device->id, cmnd->device->lun,
				       LPFC_CTX_LUN))) {
		spin_unlock_irq(phba->host->host_lock);
		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_timeout(LPFC_RESET_WAIT*HZ);
		spin_lock_irq(phba->host->host_lock);

		if (++loopcnt
		    > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
			break;
	}

	if (cnt) {
		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
			"%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
			phba->brd_no, cnt);
	}

	list_add_tail(&iocbqrsp->list, lpfc_iocb_list);

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, lpfc_cmd->pCmd->device->id,
			lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
			lpfc_cmd->result);
	lpfc_free_scsi_buf(lpfc_cmd);
out:
	return ret;
}

1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
static int
lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
{
	int rc;
	spin_lock_irq(cmnd->device->host->host_lock);
	rc = __lpfc_reset_lun_handler(cmnd);
	spin_unlock_irq(cmnd->device->host->host_lock);
	return rc;
}

已提交
1053 1054 1055 1056
/*
 * Note: midlayer calls this function with the host_lock held
 */
static int
1057
__lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
已提交
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
{
	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 = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;

	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
	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_INFO, LOG_FCP,
				"%d:0713 Bus Reset on target %d failed\n",
				phba->brd_no, i);
			err_count++;
		}
	}

	cmnd->device->id = midlayer_id;
	loopcnt = 0;
	while((cnt = lpfc_sli_sum_iocb(phba,
				&phba->sli.ring[phba->sli.fcp_ring],
				0, 0, LPFC_CTX_HOST))) {
		spin_unlock_irq(phba->host->host_lock);
		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_timeout(LPFC_RESET_WAIT*HZ);
		spin_lock_irq(phba->host->host_lock);

		if (++loopcnt
		    > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
			break;
	}

	if (cnt) {
		/* flush all outstanding commands on the host */
		i = lpfc_sli_abort_iocb(phba,
				&phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
				LPFC_CTX_HOST);

		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
		   "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
		   phba->brd_no, cnt, i);
	}

	if (!err_count)
		ret = SUCCESS;

	lpfc_free_scsi_buf(lpfc_cmd);
	lpfc_printf_log(phba,
			KERN_ERR,
			LOG_FCP,
			"%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
			phba->brd_no, ret);
out:
	return ret;
}

1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
static int
lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
{
	int rc;
	spin_lock_irq(cmnd->device->host->host_lock);
	rc = __lpfc_reset_bus_handler(cmnd);
	spin_unlock_irq(cmnd->device->host->host_lock);
	return rc;
}

已提交
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
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
	struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
	struct lpfc_nodelist *ndlp = NULL;
	int match = 0;
	struct lpfc_scsi_buf *scsi_buf = NULL;
	uint32_t total = 0, i;
	uint32_t num_to_alloc = 0;
	unsigned long flags;
	struct list_head *listp;
	struct list_head *node_list[6];

	/*
	 * Store the target pointer in the scsi_device hostdata pointer provided
	 * the driver has already discovered the target id.
	 */

	/* Search the nlp lists other than unmap_list for this target ID */
	node_list[0] = &phba->fc_npr_list;
	node_list[1] = &phba->fc_nlpmap_list;
	node_list[2] = &phba->fc_prli_list;
	node_list[3] = &phba->fc_reglogin_list;
	node_list[4] = &phba->fc_adisc_list;
	node_list[5] = &phba->fc_plogi_list;

	for (i = 0; i < 6 && !match; i++) {
		listp = node_list[i];
		if (list_empty(listp))
			continue;
		list_for_each_entry(ndlp, listp, nlp_listp) {
			if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
				match = 1;
				break;
			}
		}
	}

	if (!match)
		return -ENXIO;

	sdev->hostdata = ndlp->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.  Note
	 * that this list of scsi bufs exists for the lifetime of the driver.
	 */
	total = phba->total_scsi_bufs;
	num_to_alloc = LPFC_CMD_PER_LUN;
	if (total >= phba->cfg_hba_queue_depth) {
		printk(KERN_WARNING "%s, At config limitation of "
		       "%d allocated scsi_bufs\n", __FUNCTION__, total);
		return 0;
	} else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}

	for (i = 0; i < num_to_alloc; i++) {
		scsi_buf = lpfc_get_scsi_buf(phba);
		if (!scsi_buf) {
			printk(KERN_ERR "%s, failed to allocate "
			       "scsi_buf\n", __FUNCTION__);
			break;
		}

		spin_lock_irqsave(phba->host->host_lock, flags);
		phba->total_scsi_bufs++;
		list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
		spin_unlock_irqrestore(phba->host->host_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;

	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,
};