lpfc_scsi.c 113.1 KB
Newer Older
已提交
1 2
/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
3
 * Fibre Channel Host Bus Adapters.                                *
4
 * Copyright (C) 2004-2009 Emulex.  All rights reserved.           *
5
 * EMULEX and SLI are trademarks of Emulex.                        *
已提交
6
 * www.emulex.com                                                  *
7
 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
已提交
8 9
 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
10 11 12 13 14 15 16 17 18 19
 * 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.                                     *
已提交
20 21
 *******************************************************************/
#include <linux/pci.h>
22
#include <linux/slab.h>
已提交
23
#include <linux/interrupt.h>
24
#include <linux/delay.h>
25
#include <asm/unaligned.h>
已提交
26 27 28

#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
29
#include <scsi/scsi_eh.h>
已提交
30 31 32 33 34
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport_fc.h>

#include "lpfc_version.h"
35
#include "lpfc_hw4.h"
已提交
36 37
#include "lpfc_hw.h"
#include "lpfc_sli.h"
38
#include "lpfc_sli4.h"
39
#include "lpfc_nl.h"
已提交
40 41 42 43 44
#include "lpfc_disc.h"
#include "lpfc_scsi.h"
#include "lpfc.h"
#include "lpfc_logmsg.h"
#include "lpfc_crtn.h"
45
#include "lpfc_vport.h"
已提交
46 47 48 49

#define LPFC_RESET_WAIT  2
#define LPFC_ABORT_WAIT  2

50 51 52 53 54 55 56 57 58 59 60
int _dump_buf_done;

static char *dif_op_str[] = {
	"SCSI_PROT_NORMAL",
	"SCSI_PROT_READ_INSERT",
	"SCSI_PROT_WRITE_STRIP",
	"SCSI_PROT_READ_STRIP",
	"SCSI_PROT_WRITE_INSERT",
	"SCSI_PROT_READ_PASS",
	"SCSI_PROT_WRITE_PASS",
};
61 62
static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
63 64
static void
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
65 66

static void
67
lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
68 69 70 71 72
{
	void *src, *dst;
	struct scatterlist *sgde = scsi_sglist(cmnd);

	if (!_dump_buf_data) {
73 74
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9050 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
75 76 77 78 79 80
				__func__);
		return;
	}


	if (!sgde) {
81 82
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9051 BLKGRD: ERROR: data scatterlist is null\n");
83 84 85 86 87 88 89 90 91 92 93 94 95
		return;
	}

	dst = (void *) _dump_buf_data;
	while (sgde) {
		src = sg_virt(sgde);
		memcpy(dst, src, sgde->length);
		dst += sgde->length;
		sgde = sg_next(sgde);
	}
}

static void
96
lpfc_debug_save_dif(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
97 98 99 100 101
{
	void *src, *dst;
	struct scatterlist *sgde = scsi_prot_sglist(cmnd);

	if (!_dump_buf_dif) {
102 103
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9052 BLKGRD: ERROR %s _dump_buf_data is NULL\n",
104 105 106 107 108
				__func__);
		return;
	}

	if (!sgde) {
109 110
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9053 BLKGRD: ERROR: prot scatterlist is null\n");
111 112 113 114 115 116 117 118 119 120 121 122
		return;
	}

	dst = _dump_buf_dif;
	while (sgde) {
		src = sg_virt(sgde);
		memcpy(dst, src, sgde->length);
		dst += sgde->length;
		sgde = sg_next(sgde);
	}
}

123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
/**
 * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
 * @phba: Pointer to HBA object.
 * @lpfc_cmd: lpfc scsi command object pointer.
 *
 * This function is called from the lpfc_prep_task_mgmt_cmd function to
 * set the last bit in the response sge entry.
 **/
static void
lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
				struct lpfc_scsi_buf *lpfc_cmd)
{
	struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
	if (sgl) {
		sgl += 1;
		sgl->word2 = le32_to_cpu(sgl->word2);
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
	}
}

144
/**
145
 * lpfc_update_stats - Update statistical data for the command completion
146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
 * @phba: Pointer to HBA object.
 * @lpfc_cmd: lpfc scsi command object pointer.
 *
 * This function is called when there is a command completion and this
 * function updates the statistical data for the command completion.
 **/
static void
lpfc_update_stats(struct lpfc_hba *phba, struct  lpfc_scsi_buf *lpfc_cmd)
{
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	unsigned long flags;
	struct Scsi_Host  *shost = cmd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	unsigned long latency;
	int i;

	if (cmd->result)
		return;

167 168
	latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);

169 170 171
	spin_lock_irqsave(shost->host_lock, flags);
	if (!vport->stat_data_enabled ||
		vport->stat_data_blocked ||
172
		!pnode ||
173 174 175 176 177 178 179 180 181
		!pnode->lat_data ||
		(phba->bucket_type == LPFC_NO_BUCKET)) {
		spin_unlock_irqrestore(shost->host_lock, flags);
		return;
	}

	if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
		i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
			phba->bucket_step;
182 183 184 185 186
		/* check array subscript bounds */
		if (i < 0)
			i = 0;
		else if (i >= LPFC_MAX_BUCKET_COUNT)
			i = LPFC_MAX_BUCKET_COUNT - 1;
187 188 189 190 191 192 193 194 195 196 197 198
	} else {
		for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
			if (latency <= (phba->bucket_base +
				((1<<i)*phba->bucket_step)))
				break;
	}

	pnode->lat_data[i].cmd_count++;
	spin_unlock_irqrestore(shost->host_lock, flags);
}

/**
199
 * lpfc_send_sdev_queuedepth_change_event - Posts a queuedepth change event
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
 * @phba: Pointer to HBA context object.
 * @vport: Pointer to vport object.
 * @ndlp: Pointer to FC node associated with the target.
 * @lun: Lun number of the scsi device.
 * @old_val: Old value of the queue depth.
 * @new_val: New value of the queue depth.
 *
 * This function sends an event to the mgmt application indicating
 * there is a change in the scsi device queue depth.
 **/
static void
lpfc_send_sdev_queuedepth_change_event(struct lpfc_hba *phba,
		struct lpfc_vport  *vport,
		struct lpfc_nodelist *ndlp,
		uint32_t lun,
		uint32_t old_val,
		uint32_t new_val)
{
	struct lpfc_fast_path_event *fast_path_evt;
	unsigned long flags;

	fast_path_evt = lpfc_alloc_fast_evt(phba);
	if (!fast_path_evt)
		return;

	fast_path_evt->un.queue_depth_evt.scsi_event.event_type =
		FC_REG_SCSI_EVENT;
	fast_path_evt->un.queue_depth_evt.scsi_event.subcategory =
		LPFC_EVENT_VARQUEDEPTH;

	/* Report all luns with change in queue depth */
	fast_path_evt->un.queue_depth_evt.scsi_event.lun = lun;
	if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
		memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwpn,
			&ndlp->nlp_portname, sizeof(struct lpfc_name));
		memcpy(&fast_path_evt->un.queue_depth_evt.scsi_event.wwnn,
			&ndlp->nlp_nodename, sizeof(struct lpfc_name));
	}

	fast_path_evt->un.queue_depth_evt.oldval = old_val;
	fast_path_evt->un.queue_depth_evt.newval = new_val;
	fast_path_evt->vport = vport;

	fast_path_evt->work_evt.evt = LPFC_EVT_FASTPATH_MGMT_EVT;
	spin_lock_irqsave(&phba->hbalock, flags);
	list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
	spin_unlock_irqrestore(&phba->hbalock, flags);
	lpfc_worker_wake_up(phba);

	return;
}

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
/**
 * lpfc_change_queue_depth - Alter scsi device queue depth
 * @sdev: Pointer the scsi device on which to change the queue depth.
 * @qdepth: New queue depth to set the sdev to.
 * @reason: The reason for the queue depth change.
 *
 * This function is called by the midlayer and the LLD to alter the queue
 * depth for a scsi device. This function sets the queue depth to the new
 * value and sends an event out to log the queue depth change.
 **/
int
lpfc_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason)
{
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	struct lpfc_rport_data *rdata;
	unsigned long new_queue_depth, old_queue_depth;

	old_queue_depth = sdev->queue_depth;
	scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), qdepth);
	new_queue_depth = sdev->queue_depth;
	rdata = sdev->hostdata;
	if (rdata)
		lpfc_send_sdev_queuedepth_change_event(phba, vport,
						       rdata->pnode, sdev->lun,
						       old_queue_depth,
						       new_queue_depth);
	return sdev->queue_depth;
}

282
/**
283
 * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
284 285 286 287 288 289 290 291 292
 * @phba: The Hba for which this call is being executed.
 *
 * This routine is called when there is resource error in driver or firmware.
 * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
 * posts at most 1 event each second. This routine wakes up worker thread of
 * @phba to process WORKER_RAM_DOWN_EVENT event.
 *
 * This routine should be called with no lock held.
 **/
293
void
294
lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
295 296
{
	unsigned long flags;
297
	uint32_t evt_posted;
298 299 300 301 302 303 304 305 306 307 308 309 310 311 312

	spin_lock_irqsave(&phba->hbalock, flags);
	atomic_inc(&phba->num_rsrc_err);
	phba->last_rsrc_error_time = jiffies;

	if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
		spin_unlock_irqrestore(&phba->hbalock, flags);
		return;
	}

	phba->last_ramp_down_time = jiffies;

	spin_unlock_irqrestore(&phba->hbalock, flags);

	spin_lock_irqsave(&phba->pport->work_port_lock, flags);
313 314
	evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
	if (!evt_posted)
315 316 317
		phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
	spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);

318 319
	if (!evt_posted)
		lpfc_worker_wake_up(phba);
320 321 322
	return;
}

323
/**
324
 * lpfc_rampup_queue_depth - Post RAMP_UP_QUEUE event for worker thread
325 326 327 328 329 330 331 332 333
 * @phba: The Hba for which this call is being executed.
 *
 * This routine post WORKER_RAMP_UP_QUEUE event for @phba vport. This routine
 * post at most 1 event every 5 minute after last_ramp_up_time or
 * last_rsrc_error_time.  This routine wakes up worker thread of @phba
 * to process WORKER_RAM_DOWN_EVENT event.
 *
 * This routine should be called with no lock held.
 **/
334
static inline void
335
lpfc_rampup_queue_depth(struct lpfc_vport  *vport,
336
			uint32_t queue_depth)
337 338
{
	unsigned long flags;
339
	struct lpfc_hba *phba = vport->phba;
340
	uint32_t evt_posted;
341 342
	atomic_inc(&phba->num_cmd_success);

343
	if (vport->cfg_lun_queue_depth <= queue_depth)
344 345
		return;
	spin_lock_irqsave(&phba->hbalock, flags);
346 347 348 349
	if (time_before(jiffies,
			phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) ||
	    time_before(jiffies,
			phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL)) {
350 351 352 353 354 355 356
		spin_unlock_irqrestore(&phba->hbalock, flags);
		return;
	}
	phba->last_ramp_up_time = jiffies;
	spin_unlock_irqrestore(&phba->hbalock, flags);

	spin_lock_irqsave(&phba->pport->work_port_lock, flags);
357 358
	evt_posted = phba->pport->work_port_events & WORKER_RAMP_UP_QUEUE;
	if (!evt_posted)
359 360 361
		phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
	spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);

362 363 364
	if (!evt_posted)
		lpfc_worker_wake_up(phba);
	return;
365 366
}

367
/**
368
 * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
369 370 371 372 373 374
 * @phba: The Hba for which this call is being executed.
 *
 * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
 * thread.This routine reduces queue depth for all scsi device on each vport
 * associated with @phba.
 **/
375 376 377
void
lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
{
378 379
	struct lpfc_vport **vports;
	struct Scsi_Host  *shost;
380
	struct scsi_device *sdev;
381
	unsigned long new_queue_depth;
382
	unsigned long num_rsrc_err, num_cmd_success;
383
	int i;
384 385 386 387

	num_rsrc_err = atomic_read(&phba->num_rsrc_err);
	num_cmd_success = atomic_read(&phba->num_cmd_success);

388 389
	vports = lpfc_create_vport_work_array(phba);
	if (vports != NULL)
390
		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
391 392
			shost = lpfc_shost_from_vport(vports[i]);
			shost_for_each_device(sdev, shost) {
393
				new_queue_depth =
394 395 396 397 398 399 400
					sdev->queue_depth * num_rsrc_err /
					(num_rsrc_err + num_cmd_success);
				if (!new_queue_depth)
					new_queue_depth = sdev->queue_depth - 1;
				else
					new_queue_depth = sdev->queue_depth -
								new_queue_depth;
401 402
				lpfc_change_queue_depth(sdev, new_queue_depth,
							SCSI_QDEPTH_DEFAULT);
403
			}
404
		}
405
	lpfc_destroy_vport_work_array(phba, vports);
406 407 408 409
	atomic_set(&phba->num_rsrc_err, 0);
	atomic_set(&phba->num_cmd_success, 0);
}

410
/**
411
 * lpfc_ramp_up_queue_handler - WORKER_RAMP_UP_QUEUE event handler
412 413 414 415 416 417 418
 * @phba: The Hba for which this call is being executed.
 *
 * This routine is called to  process WORKER_RAMP_UP_QUEUE event for worker
 * thread.This routine increases queue depth for all scsi device on each vport
 * associated with @phba by 1. This routine also sets @phba num_rsrc_err and
 * num_cmd_success to zero.
 **/
419 420 421
void
lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
{
422 423
	struct lpfc_vport **vports;
	struct Scsi_Host  *shost;
424
	struct scsi_device *sdev;
425 426 427 428
	int i;

	vports = lpfc_create_vport_work_array(phba);
	if (vports != NULL)
429
		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
430 431
			shost = lpfc_shost_from_vport(vports[i]);
			shost_for_each_device(sdev, shost) {
432 433 434
				if (vports[i]->cfg_lun_queue_depth <=
				    sdev->queue_depth)
					continue;
435 436 437
				lpfc_change_queue_depth(sdev,
							sdev->queue_depth+1,
							SCSI_QDEPTH_RAMP_UP);
438
			}
439
		}
440
	lpfc_destroy_vport_work_array(phba, vports);
441 442 443 444
	atomic_set(&phba->num_rsrc_err, 0);
	atomic_set(&phba->num_cmd_success, 0);
}

445
/**
446
 * lpfc_scsi_dev_block - set all scsi hosts to block state
447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463
 * @phba: Pointer to HBA context object.
 *
 * This function walks vport list and set each SCSI host to block state
 * by invoking fc_remote_port_delete() routine. This function is invoked
 * with EEH when device's PCI slot has been permanently disabled.
 **/
void
lpfc_scsi_dev_block(struct lpfc_hba *phba)
{
	struct lpfc_vport **vports;
	struct Scsi_Host  *shost;
	struct scsi_device *sdev;
	struct fc_rport *rport;
	int i;

	vports = lpfc_create_vport_work_array(phba);
	if (vports != NULL)
464
		for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
465 466 467 468 469 470 471 472 473
			shost = lpfc_shost_from_vport(vports[i]);
			shost_for_each_device(sdev, shost) {
				rport = starget_to_rport(scsi_target(sdev));
				fc_remote_port_delete(rport);
			}
		}
	lpfc_destroy_vport_work_array(phba, vports);
}

474
/**
475
 * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
476
 * @vport: The virtual port for which this call being executed.
477
 * @num_to_allocate: The requested number of buffers to allocate.
478
 *
479 480 481 482 483 484
 * This routine allocates a scsi buffer for device with SLI-3 interface spec,
 * the scsi buffer 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 initial BPL. In addition to allocating memory, the FCP CMND and
 * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
485 486
 *
 * Return codes:
487 488
 *   int - number of scsi buffers that were allocated.
 *   0 = failure, less than num_to_alloc is a partial failure.
489
 **/
490 491
static int
lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
已提交
492
{
J
James Smart 已提交
493
	struct lpfc_hba *phba = vport->phba;
已提交
494 495 496
	struct lpfc_scsi_buf *psb;
	struct ulp_bde64 *bpl;
	IOCB_t *iocb;
497 498 499
	dma_addr_t pdma_phys_fcp_cmd;
	dma_addr_t pdma_phys_fcp_rsp;
	dma_addr_t pdma_phys_bpl;
500
	uint16_t iotag;
501
	int bcnt;
已提交
502

503 504 505 506
	for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
		psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
		if (!psb)
			break;
已提交
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
		/*
		 * 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);
			break;
		}

		/* 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);
			break;
		}
		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) +
537
			sizeof(struct fcp_rsp);
已提交
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
		/* Initialize local short-hand pointers. */
		bpl = psb->fcp_bpl;
		pdma_phys_fcp_cmd = psb->dma_handle;
		pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
		pdma_phys_bpl = psb->dma_handle + sizeof(struct fcp_cmnd) +
			sizeof(struct fcp_rsp);

		/*
		 * 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[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
		bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
		bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
		bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
		bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);

		/* Setup the physical region for the FCP RSP */
		bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
		bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
		bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
		bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
		bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);

		/*
		 * Since the IOCB for the FCP I/O is built into this
		 * lpfc_scsi_buf, initialize it with all known data now.
		 */
		iocb = &psb->cur_iocbq.iocb;
		iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
		if ((phba->sli_rev == 3) &&
				!(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
			/* fill in immediate fcp command BDE */
			iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
			iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
			iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
					unsli3.fcp_ext.icd);
			iocb->un.fcpi64.bdl.addrHigh = 0;
			iocb->ulpBdeCount = 0;
			iocb->ulpLe = 0;
			/* fill in responce BDE */
			iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
							BUFF_TYPE_BDE_64;
			iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
				sizeof(struct fcp_rsp);
			iocb->unsli3.fcp_ext.rbde.addrLow =
				putPaddrLow(pdma_phys_fcp_rsp);
			iocb->unsli3.fcp_ext.rbde.addrHigh =
				putPaddrHigh(pdma_phys_fcp_rsp);
		} else {
			iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
			iocb->un.fcpi64.bdl.bdeSize =
					(2 * sizeof(struct ulp_bde64));
			iocb->un.fcpi64.bdl.addrLow =
					putPaddrLow(pdma_phys_bpl);
			iocb->un.fcpi64.bdl.addrHigh =
					putPaddrHigh(pdma_phys_bpl);
			iocb->ulpBdeCount = 1;
			iocb->ulpLe = 1;
		}
		iocb->ulpClass = CLASS3;
		psb->status = IOSTAT_SUCCESS;
602
		/* Put it back into the SCSI buffer list */
J
James Smart 已提交
603
		psb->cur_iocbq.context1  = psb;
604
		lpfc_release_scsi_buf_s3(phba, psb);
已提交
605

606
	}
已提交
607

608
	return bcnt;
已提交
609 610
}

611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
/**
 * lpfc_sli4_fcp_xri_aborted - Fast-path process of fcp xri abort
 * @phba: pointer to lpfc hba data structure.
 * @axri: pointer to the fcp xri abort wcqe structure.
 *
 * This routine is invoked by the worker thread to process a SLI4 fast-path
 * FCP aborted xri.
 **/
void
lpfc_sli4_fcp_xri_aborted(struct lpfc_hba *phba,
			  struct sli4_wcqe_xri_aborted *axri)
{
	uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
	struct lpfc_scsi_buf *psb, *next_psb;
	unsigned long iflag = 0;
626 627
	struct lpfc_iocbq *iocbq;
	int i;
628
	struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
629

630 631
	spin_lock_irqsave(&phba->hbalock, iflag);
	spin_lock(&phba->sli4_hba.abts_scsi_buf_list_lock);
632 633 634 635
	list_for_each_entry_safe(psb, next_psb,
		&phba->sli4_hba.lpfc_abts_scsi_buf_list, list) {
		if (psb->cur_iocbq.sli4_xritag == xri) {
			list_del(&psb->list);
636
			psb->exch_busy = 0;
637
			psb->status = IOSTAT_SUCCESS;
638 639 640
			spin_unlock(
				&phba->sli4_hba.abts_scsi_buf_list_lock);
			spin_unlock_irqrestore(&phba->hbalock, iflag);
641 642 643 644
			lpfc_release_scsi_buf_s4(phba, psb);
			return;
		}
	}
645 646 647 648 649 650 651 652 653 654 655 656
	spin_unlock(&phba->sli4_hba.abts_scsi_buf_list_lock);
	for (i = 1; i <= phba->sli.last_iotag; i++) {
		iocbq = phba->sli.iocbq_lookup[i];

		if (!(iocbq->iocb_flag &  LPFC_IO_FCP) ||
			(iocbq->iocb_flag & LPFC_IO_LIBDFC))
			continue;
		if (iocbq->sli4_xritag != xri)
			continue;
		psb = container_of(iocbq, struct lpfc_scsi_buf, cur_iocbq);
		psb->exch_busy = 0;
		spin_unlock_irqrestore(&phba->hbalock, iflag);
657 658
		if (pring->txq_cnt)
			lpfc_worker_wake_up(phba);
659 660 661 662
		return;

	}
	spin_unlock_irqrestore(&phba->hbalock, iflag);
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
}

/**
 * lpfc_sli4_repost_scsi_sgl_list - Repsot the Scsi buffers sgl pages as block
 * @phba: pointer to lpfc hba data structure.
 *
 * This routine walks the list of scsi buffers that have been allocated and
 * repost them to the HBA by using SGL block post. This is needed after a
 * pci_function_reset/warm_start or start. The lpfc_hba_down_post_s4 routine
 * is responsible for moving all scsi buffers on the lpfc_abts_scsi_sgl_list
 * to the lpfc_scsi_buf_list. If the repost fails, reject all scsi buffers.
 *
 * Returns: 0 = success, non-zero failure.
 **/
int
lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
{
	struct lpfc_scsi_buf *psb;
	int index, status, bcnt = 0, rcnt = 0, rc = 0;
	LIST_HEAD(sblist);

	for (index = 0; index < phba->sli4_hba.scsi_xri_cnt; index++) {
		psb = phba->sli4_hba.lpfc_scsi_psb_array[index];
		if (psb) {
			/* Remove from SCSI buffer list */
			list_del(&psb->list);
			/* Add it to a local SCSI buffer list */
			list_add_tail(&psb->list, &sblist);
			if (++rcnt == LPFC_NEMBED_MBOX_SGL_CNT) {
				bcnt = rcnt;
				rcnt = 0;
			}
		} else
			/* A hole present in the XRI array, need to skip */
			bcnt = rcnt;

		if (index == phba->sli4_hba.scsi_xri_cnt - 1)
			/* End of XRI array for SCSI buffer, complete */
			bcnt = rcnt;

		/* Continue until collect up to a nembed page worth of sgls */
		if (bcnt == 0)
			continue;
		/* Now, post the SCSI buffer list sgls as a block */
		status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
		/* Reset SCSI buffer count for next round of posting */
		bcnt = 0;
		while (!list_empty(&sblist)) {
			list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
					 list);
			if (status) {
				/* Put this back on the abort scsi list */
715
				psb->exch_busy = 1;
716
				rc++;
717 718
			} else {
				psb->exch_busy = 0;
719
				psb->status = IOSTAT_SUCCESS;
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
			/* Put it back into the SCSI buffer list */
			lpfc_release_scsi_buf_s4(phba, psb);
		}
	}
	return rc;
}

/**
 * lpfc_new_scsi_buf_s4 - Scsi buffer allocator for HBA with SLI4 IF spec
 * @vport: The virtual port for which this call being executed.
 * @num_to_allocate: The requested number of buffers to allocate.
 *
 * This routine allocates a scsi buffer for device with SLI-4 interface spec,
 * the scsi buffer contains all the necessary information needed to initiate
 * a SCSI I/O.
 *
 * Return codes:
 *   int - number of scsi buffers that were allocated.
 *   0 = failure, less than num_to_alloc is a partial failure.
 **/
static int
lpfc_new_scsi_buf_s4(struct lpfc_vport *vport, int num_to_alloc)
{
	struct lpfc_hba *phba = vport->phba;
	struct lpfc_scsi_buf *psb;
	struct sli4_sge *sgl;
	IOCB_t *iocb;
	dma_addr_t pdma_phys_fcp_cmd;
	dma_addr_t pdma_phys_fcp_rsp;
	dma_addr_t pdma_phys_bpl, pdma_phys_bpl1;
	uint16_t iotag, last_xritag = NO_XRI;
	int status = 0, index;
	int bcnt;
	int non_sequential_xri = 0;
	LIST_HEAD(sblist);

	for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
		psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
		if (!psb)
			break;

		/*
		 * 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);
			break;
		}

		/* 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) {
781 782
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
				psb->data, psb->dma_handle);
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
			kfree(psb);
			break;
		}

		psb->cur_iocbq.sli4_xritag = lpfc_sli4_next_xritag(phba);
		if (psb->cur_iocbq.sli4_xritag == NO_XRI) {
			pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
			      psb->data, psb->dma_handle);
			kfree(psb);
			break;
		}
		if (last_xritag != NO_XRI
			&& psb->cur_iocbq.sli4_xritag != (last_xritag+1)) {
			non_sequential_xri = 1;
		} else
			list_add_tail(&psb->list, &sblist);
		last_xritag = psb->cur_iocbq.sli4_xritag;

		index = phba->sli4_hba.scsi_xri_cnt++;
		psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;

		psb->fcp_bpl = psb->data;
		psb->fcp_cmnd = (psb->data + phba->cfg_sg_dma_buf_size)
			- (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
		psb->fcp_rsp = (struct fcp_rsp *)((uint8_t *)psb->fcp_cmnd +
					sizeof(struct fcp_cmnd));

		/* Initialize local short-hand pointers. */
		sgl = (struct sli4_sge *)psb->fcp_bpl;
		pdma_phys_bpl = psb->dma_handle;
		pdma_phys_fcp_cmd =
			(psb->dma_handle + phba->cfg_sg_dma_buf_size)
			 - (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
		pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);

		/*
		 * 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.
		 */
		sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
		sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);
827
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
828 829 830 831 832 833 834
		sgl++;

		/* Setup the physical region for the FCP RSP */
		sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
		sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
835
		sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853

		/*
		 * Since the IOCB for the FCP I/O is built into this
		 * lpfc_scsi_buf, initialize it with all known data now.
		 */
		iocb = &psb->cur_iocbq.iocb;
		iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
		iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_64;
		/* setting the BLP size to 2 * sizeof BDE may not be correct.
		 * We are setting the bpl to point to out sgl. An sgl's
		 * entries are 16 bytes, a bpl entries are 12 bytes.
		 */
		iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
		iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys_fcp_cmd);
		iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys_fcp_cmd);
		iocb->ulpBdeCount = 1;
		iocb->ulpLe = 1;
		iocb->ulpClass = CLASS3;
J
James Smart 已提交
854
		psb->cur_iocbq.context1  = psb;
855 856 857 858 859 860 861 862 863 864 865 866
		if (phba->cfg_sg_dma_buf_size > SGL_PAGE_SIZE)
			pdma_phys_bpl1 = pdma_phys_bpl + SGL_PAGE_SIZE;
		else
			pdma_phys_bpl1 = 0;
		psb->dma_phys_bpl = pdma_phys_bpl;
		phba->sli4_hba.lpfc_scsi_psb_array[index] = psb;
		if (non_sequential_xri) {
			status = lpfc_sli4_post_sgl(phba, pdma_phys_bpl,
						pdma_phys_bpl1,
						psb->cur_iocbq.sli4_xritag);
			if (status) {
				/* Put this back on the abort scsi list */
867 868 869
				psb->exch_busy = 1;
			} else {
				psb->exch_busy = 0;
870
				psb->status = IOSTAT_SUCCESS;
871
			}
872 873 874 875 876 877 878 879 880 881 882 883 884
			/* Put it back into the SCSI buffer list */
			lpfc_release_scsi_buf_s4(phba, psb);
			break;
		}
	}
	if (bcnt) {
		status = lpfc_sli4_post_scsi_sgl_block(phba, &sblist, bcnt);
		/* Reset SCSI buffer count for next round of posting */
		while (!list_empty(&sblist)) {
			list_remove_head(&sblist, psb, struct lpfc_scsi_buf,
				 list);
			if (status) {
				/* Put this back on the abort scsi list */
885 886 887
				psb->exch_busy = 1;
			} else {
				psb->exch_busy = 0;
888
				psb->status = IOSTAT_SUCCESS;
889
			}
890 891 892 893 894
			/* Put it back into the SCSI buffer list */
			lpfc_release_scsi_buf_s4(phba, psb);
		}
	}

895
	return bcnt + non_sequential_xri;
896 897
}

898
/**
899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
 * lpfc_new_scsi_buf - Wrapper funciton for scsi buffer allocator
 * @vport: The virtual port for which this call being executed.
 * @num_to_allocate: The requested number of buffers to allocate.
 *
 * This routine wraps the actual SCSI buffer allocator function pointer from
 * the lpfc_hba struct.
 *
 * Return codes:
 *   int - number of scsi buffers that were allocated.
 *   0 = failure, less than num_to_alloc is a partial failure.
 **/
static inline int
lpfc_new_scsi_buf(struct lpfc_vport *vport, int num_to_alloc)
{
	return vport->phba->lpfc_new_scsi_buf(vport, num_to_alloc);
}

/**
 * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
 * @phba: The HBA for which this call is being executed.
919 920 921 922 923 924 925 926
 *
 * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
 * and returns to caller.
 *
 * Return codes:
 *   NULL - Error
 *   Pointer to lpfc_scsi_buf - Success
 **/
927
static struct lpfc_scsi_buf*
928
lpfc_get_scsi_buf(struct lpfc_hba * phba)
已提交
929
{
930 931
	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
932
	unsigned long iflag = 0;
933

934
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
935
	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
936 937 938
	if (lpfc_cmd) {
		lpfc_cmd->seg_cnt = 0;
		lpfc_cmd->nonsg_phys = 0;
939
		lpfc_cmd->prot_seg_cnt = 0;
940
	}
941
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
942 943
	return  lpfc_cmd;
}
已提交
944

945
/**
946
 * lpfc_release_scsi_buf - Return a scsi buffer back to hba scsi buf list
947 948 949 950 951 952
 * @phba: The Hba for which this call is being executed.
 * @psb: The scsi buffer which is being released.
 *
 * This routine releases @psb scsi buffer by adding it to tail of @phba
 * lpfc_scsi_buf_list list.
 **/
953
static void
954
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
955
{
956
	unsigned long iflag = 0;
已提交
957

958
	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
959
	psb->pCmd = NULL;
已提交
960
	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
961
	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
已提交
962 963
}

964 965 966 967 968 969 970 971 972 973 974 975 976 977 978
/**
 * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
 * @phba: The Hba for which this call is being executed.
 * @psb: The scsi buffer which is being released.
 *
 * This routine releases @psb scsi buffer by adding it to tail of @phba
 * lpfc_scsi_buf_list list. For SLI4 XRI's are tied to the scsi buffer
 * and cannot be reused for at least RA_TOV amount of time if it was
 * aborted.
 **/
static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{
	unsigned long iflag = 0;

979
	if (psb->exch_busy) {
980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995
		spin_lock_irqsave(&phba->sli4_hba.abts_scsi_buf_list_lock,
					iflag);
		psb->pCmd = NULL;
		list_add_tail(&psb->list,
			&phba->sli4_hba.lpfc_abts_scsi_buf_list);
		spin_unlock_irqrestore(&phba->sli4_hba.abts_scsi_buf_list_lock,
					iflag);
	} else {

		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);
	}
}

996
/**
997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
 * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
 * @phba: The Hba for which this call is being executed.
 * @psb: The scsi buffer which is being released.
 *
 * This routine releases @psb scsi buffer by adding it to tail of @phba
 * lpfc_scsi_buf_list list.
 **/
static void
lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{

	phba->lpfc_release_scsi_buf(phba, psb);
}

/**
 * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
1013 1014 1015 1016
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
1017 1018 1019
 * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
 * through sg elements and format the bdea. This routine also initializes all
 * IOCB fields which are dependent on scsi command request buffer.
1020 1021 1022 1023 1024
 *
 * Return codes:
 *   1 - Error
 *   0 - Success
 **/
已提交
1025
static int
1026
lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
已提交
1027 1028 1029 1030 1031
{
	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;
1032
	struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
已提交
1033
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
1034
	struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
已提交
1035
	dma_addr_t physaddr;
1036
	uint32_t num_bde = 0;
1037
	int nseg, datadir = scsi_cmnd->sc_data_direction;
已提交
1038 1039 1040 1041 1042 1043 1044 1045

	/*
	 * 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;
1046
	if (scsi_sg_count(scsi_cmnd)) {
已提交
1047 1048 1049 1050 1051 1052 1053
		/*
		 * 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.
		 */

1054 1055 1056 1057 1058
		nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
				  scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!nseg))
			return 1;

1059
		lpfc_cmd->seg_cnt = nseg;
已提交
1060
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1061 1062
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9064 BLKGRD: %s: Too many sg segments from "
1063
			       "dma_map_sg.  Config %d, seg_cnt %d\n",
1064
			       __func__, phba->cfg_sg_seg_cnt,
已提交
1065
			       lpfc_cmd->seg_cnt);
1066
			scsi_dma_unmap(scsi_cmnd);
已提交
1067 1068 1069 1070 1071 1072 1073 1074
			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.
1075 1076 1077
		 * When using SLI-3 the driver will try to fit all the BDEs into
		 * the IOCB. If it can't then the BDEs get added to a BPL as it
		 * does for SLI-2 mode.
已提交
1078
		 */
1079
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
已提交
1080
			physaddr = sg_dma_address(sgel);
1081
			if (phba->sli_rev == 3 &&
1082
			    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
1083
			    !(iocbq->iocb_flag & DSS_SECURITY_OP) &&
1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
			    nseg <= LPFC_EXT_DATA_BDE_COUNT) {
				data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
				data_bde->tus.f.bdeSize = sg_dma_len(sgel);
				data_bde->addrLow = putPaddrLow(physaddr);
				data_bde->addrHigh = putPaddrHigh(physaddr);
				data_bde++;
			} else {
				bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
				bpl->tus.f.bdeSize = sg_dma_len(sgel);
				bpl->tus.w = le32_to_cpu(bpl->tus.w);
				bpl->addrLow =
					le32_to_cpu(putPaddrLow(physaddr));
				bpl->addrHigh =
					le32_to_cpu(putPaddrHigh(physaddr));
				bpl++;
			}
已提交
1100
		}
1101
	}
已提交
1102 1103 1104

	/*
	 * Finish initializing those IOCB fields that are dependent on the
1105 1106 1107
	 * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
	 * explicitly reinitialized and for SLI-3 the extended bde count is
	 * explicitly reinitialized since all iocb memory resources are reused.
已提交
1108
	 */
1109
	if (phba->sli_rev == 3 &&
1110 1111
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
	    !(iocbq->iocb_flag & DSS_SECURITY_OP)) {
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
		if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
			/*
			 * The extended IOCB format can only fit 3 BDE or a BPL.
			 * This I/O has more than 3 BDE so the 1st data bde will
			 * be a BPL that is filled in here.
			 */
			physaddr = lpfc_cmd->dma_handle;
			data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
			data_bde->tus.f.bdeSize = (num_bde *
						   sizeof(struct ulp_bde64));
			physaddr += (sizeof(struct fcp_cmnd) +
				     sizeof(struct fcp_rsp) +
				     (2 * sizeof(struct ulp_bde64)));
			data_bde->addrHigh = putPaddrHigh(physaddr);
			data_bde->addrLow = putPaddrLow(physaddr);
			/* ebde count includes the responce bde and data bpl */
			iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
		} else {
			/* ebde count includes the responce bde and data bdes */
			iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
		}
	} else {
		iocb_cmd->un.fcpi64.bdl.bdeSize =
			((num_bde + 2) * sizeof(struct ulp_bde64));
1136
		iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
1137
	}
1138
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
1139 1140 1141 1142 1143

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
1144
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
1145 1146 1147 1148
	return 0;
}

/*
1149 1150 1151 1152 1153 1154 1155
 * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
 * @sc: The SCSI command to examine
 * @txopt: (out) BlockGuard operation for transmitted data
 * @rxopt: (out) BlockGuard operation for received data
 *
 * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
 *
1156 1157
 */
static int
1158 1159
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		uint8_t *txop, uint8_t *rxop)
1160 1161
{
	uint8_t guard_type = scsi_host_get_guard(sc->device->host);
1162
	uint8_t ret = 0;
1163 1164 1165 1166 1167

	if (guard_type == SHOST_DIX_GUARD_IP) {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
1168 1169
			*txop = BG_OP_IN_CSUM_OUT_NODIF;
			*rxop = BG_OP_IN_NODIF_OUT_CSUM;
1170 1171 1172 1173
			break;

		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1174 1175
			*txop = BG_OP_IN_NODIF_OUT_CRC;
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1176 1177
			break;

1178 1179
		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1180 1181
			*txop = BG_OP_IN_CSUM_OUT_CRC;
			*rxop = BG_OP_IN_CRC_OUT_CSUM;
1182 1183 1184 1185
			break;

		case SCSI_PROT_NORMAL:
		default:
1186
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
1187
				"9063 BLKGRD: Bad op/guard:%d/%d combination\n",
1188
					scsi_get_prot_op(sc), guard_type);
1189
			ret = 1;
1190 1191 1192 1193 1194 1195 1196
			break;

		}
	} else if (guard_type == SHOST_DIX_GUARD_CRC) {
		switch (scsi_get_prot_op(sc)) {
		case SCSI_PROT_READ_STRIP:
		case SCSI_PROT_WRITE_INSERT:
1197 1198
			*txop = BG_OP_IN_NODIF_OUT_CRC;
			*rxop = BG_OP_IN_CRC_OUT_NODIF;
1199 1200 1201 1202
			break;

		case SCSI_PROT_READ_PASS:
		case SCSI_PROT_WRITE_PASS:
1203 1204
			*txop = BG_OP_IN_CRC_OUT_CRC;
			*rxop = BG_OP_IN_CRC_OUT_CRC;
1205 1206 1207 1208 1209 1210
			break;

		case SCSI_PROT_READ_INSERT:
		case SCSI_PROT_WRITE_STRIP:
		case SCSI_PROT_NORMAL:
		default:
1211 1212
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9075 BLKGRD: Bad op/guard:%d/%d combination\n",
1213
					scsi_get_prot_op(sc), guard_type);
1214
			ret = 1;
1215 1216 1217 1218 1219 1220 1221
			break;
		}
	} else {
		/* unsupported format */
		BUG();
	}

1222
	return ret;
1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239
}

struct scsi_dif_tuple {
	__be16 guard_tag;       /* Checksum */
	__be16 app_tag;         /* Opaque storage */
	__be32 ref_tag;         /* Target LBA or indirect LBA */
};

static inline unsigned
lpfc_cmd_blksize(struct scsi_cmnd *sc)
{
	return sc->device->sector_size;
}

/**
 * lpfc_get_cmd_dif_parms - Extract DIF parameters from SCSI command
 * @sc:             in: SCSI command
1240 1241 1242
 * @apptagmask:     out: app tag mask
 * @apptagval:      out: app tag value
 * @reftag:         out: ref tag (reference tag)
1243 1244
 *
 * Description:
1245 1246
 *   Extract DIF parameters from the command if possible.  Otherwise,
 *   use default parameters.
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
 *
 **/
static inline void
lpfc_get_cmd_dif_parms(struct scsi_cmnd *sc, uint16_t *apptagmask,
		uint16_t *apptagval, uint32_t *reftag)
{
	struct  scsi_dif_tuple *spt;
	unsigned char op = scsi_get_prot_op(sc);
	unsigned int protcnt = scsi_prot_sg_count(sc);
	static int cnt;

	if (protcnt && (op == SCSI_PROT_WRITE_STRIP ||
1259
				op == SCSI_PROT_WRITE_PASS)) {
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

		cnt++;
		spt = page_address(sg_page(scsi_prot_sglist(sc))) +
			scsi_prot_sglist(sc)[0].offset;
		*apptagmask = 0;
		*apptagval = 0;
		*reftag = cpu_to_be32(spt->ref_tag);

	} else {
		/* SBC defines ref tag to be lower 32bits of LBA */
		*reftag = (uint32_t) (0xffffffff & scsi_get_lba(sc));
		*apptagmask = 0;
		*apptagval = 0;
	}
}

/*
 * This function sets up buffer list for protection groups of
 * type LPFC_PG_TYPE_NO_DIF
 *
 * This is usually used when the HBA is instructed to generate
 * DIFs and insert them into data stream (or strip DIF from
 * incoming data stream)
 *
 * The buffer list consists of just one protection group described
 * below:
 *                                +-------------------------+
1287 1288 1289
 *   start of prot group  -->     |          PDE_5          |
 *                                +-------------------------+
 *                                |          PDE_6          |
1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306
 *                                +-------------------------+
 *                                |         Data BDE        |
 *                                +-------------------------+
 *                                |more Data BDE's ... (opt)|
 *                                +-------------------------+
 *
 * @sc: pointer to scsi command we're working on
 * @bpl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 *
 * Note: Data s/g buffers have been dma mapped
 */
static int
lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		struct ulp_bde64 *bpl, int datasegcnt)
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
1307 1308
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
1309
	dma_addr_t physaddr;
1310
	int i = 0, num_bde = 0, status;
1311 1312 1313 1314
	int datadir = sc->sc_data_direction;
	unsigned blksize;
	uint32_t reftag;
	uint16_t apptagmask, apptagval;
1315
	uint8_t txop, rxop;
1316

1317 1318
	status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
1319 1320
		goto out;

1321
	/* extract some info from the scsi command for pde*/
1322 1323 1324
	blksize = lpfc_cmd_blksize(sc);
	lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);

1325 1326 1327 1328 1329 1330
	/* setup PDE5 with what we have */
	pde5 = (struct lpfc_pde5 *) bpl;
	memset(pde5, 0, sizeof(struct lpfc_pde5));
	bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
	pde5->reftag = reftag;

1331
	/* Endianness conversion if necessary for PDE5 */
1332 1333 1334
	pde5->word0 = cpu_to_le32(pde5->word0);
	pde5->reftag = cpu_to_le32(pde5->reftag);

1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
	/* advance bpl and increment bde count */
	num_bde++;
	bpl++;
	pde6 = (struct lpfc_pde6 *) bpl;

	/* setup PDE6 with the rest of the info */
	memset(pde6, 0, sizeof(struct lpfc_pde6));
	bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
	bf_set(pde6_optx, pde6, txop);
	bf_set(pde6_oprx, pde6, rxop);
	if (datadir == DMA_FROM_DEVICE) {
		bf_set(pde6_ce, pde6, 1);
		bf_set(pde6_re, pde6, 1);
		bf_set(pde6_ae, pde6, 1);
	}
	bf_set(pde6_ai, pde6, 1);
	bf_set(pde6_apptagval, pde6, apptagval);
1352

1353
	/* Endianness conversion if necessary for PDE6 */
1354 1355 1356 1357
	pde6->word0 = cpu_to_le32(pde6->word0);
	pde6->word1 = cpu_to_le32(pde6->word1);
	pde6->word2 = cpu_to_le32(pde6->word2);

1358
	/* advance bpl and increment bde count */
1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392
	num_bde++;
	bpl++;

	/* assumption: caller has already run dma_map_sg on command data */
	scsi_for_each_sg(sc, sgde, datasegcnt, i) {
		physaddr = sg_dma_address(sgde);
		bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
		bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
		bpl->tus.f.bdeSize = sg_dma_len(sgde);
		if (datadir == DMA_TO_DEVICE)
			bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
		else
			bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
		bpl->tus.w = le32_to_cpu(bpl->tus.w);
		bpl++;
		num_bde++;
	}

out:
	return num_bde;
}

/*
 * This function sets up buffer list for protection groups of
 * type LPFC_PG_TYPE_DIF_BUF
 *
 * This is usually used when DIFs are in their own buffers,
 * separate from the data. The HBA can then by instructed
 * to place the DIFs in the outgoing stream.  For read operations,
 * The HBA could extract the DIFs and place it in DIF buffers.
 *
 * The buffer list for this type consists of one or more of the
 * protection groups described below:
 *                                    +-------------------------+
1393
 *   start of first prot group  -->   |          PDE_5          |
1394
 *                                    +-------------------------+
1395 1396 1397
 *                                    |          PDE_6          |
 *                                    +-------------------------+
 *                                    |      PDE_7 (Prot BDE)   |
1398 1399 1400 1401 1402
 *                                    +-------------------------+
 *                                    |        Data BDE         |
 *                                    +-------------------------+
 *                                    |more Data BDE's ... (opt)|
 *                                    +-------------------------+
1403
 *   start of new  prot group  -->    |          PDE_5          |
1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421
 *                                    +-------------------------+
 *                                    |          ...            |
 *                                    +-------------------------+
 *
 * @sc: pointer to scsi command we're working on
 * @bpl: pointer to buffer list for protection groups
 * @datacnt: number of segments of data that have been dma mapped
 * @protcnt: number of segment of protection data that have been dma mapped
 *
 * Note: It is assumed that both data and protection s/g buffers have been
 *       mapped for DMA
 */
static int
lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
		struct ulp_bde64 *bpl, int datacnt, int protcnt)
{
	struct scatterlist *sgde = NULL; /* s/g data entry */
	struct scatterlist *sgpe = NULL; /* s/g prot entry */
1422 1423
	struct lpfc_pde5 *pde5 = NULL;
	struct lpfc_pde6 *pde6 = NULL;
1424 1425 1426 1427 1428 1429
	struct ulp_bde64 *prot_bde = NULL;
	dma_addr_t dataphysaddr, protphysaddr;
	unsigned short curr_data = 0, curr_prot = 0;
	unsigned int split_offset, protgroup_len;
	unsigned int protgrp_blks, protgrp_bytes;
	unsigned int remainder, subtotal;
1430
	int status;
1431 1432 1433 1434 1435
	int datadir = sc->sc_data_direction;
	unsigned char pgdone = 0, alldone = 0;
	unsigned blksize;
	uint32_t reftag;
	uint16_t apptagmask, apptagval;
1436
	uint8_t txop, rxop;
1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448
	int num_bde = 0;

	sgpe = scsi_prot_sglist(sc);
	sgde = scsi_sglist(sc);

	if (!sgpe || !sgde) {
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"9020 Invalid s/g entry: data=0x%p prot=0x%p\n",
				sgpe, sgde);
		return 0;
	}

1449 1450
	status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
	if (status)
1451 1452
		goto out;

1453
	/* extract some info from the scsi command */
1454 1455 1456 1457 1458
	blksize = lpfc_cmd_blksize(sc);
	lpfc_get_cmd_dif_parms(sc, &apptagmask, &apptagval, &reftag);

	split_offset = 0;
	do {
1459 1460 1461 1462 1463
		/* setup PDE5 with what we have */
		pde5 = (struct lpfc_pde5 *) bpl;
		memset(pde5, 0, sizeof(struct lpfc_pde5));
		bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
		pde5->reftag = reftag;
1464

1465
		/* Endianness conversion if necessary for PDE5 */
1466 1467 1468
		pde5->word0 = cpu_to_le32(pde5->word0);
		pde5->reftag = cpu_to_le32(pde5->reftag);

1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
		/* advance bpl and increment bde count */
		num_bde++;
		bpl++;
		pde6 = (struct lpfc_pde6 *) bpl;

		/* setup PDE6 with the rest of the info */
		memset(pde6, 0, sizeof(struct lpfc_pde6));
		bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
		bf_set(pde6_optx, pde6, txop);
		bf_set(pde6_oprx, pde6, rxop);
		bf_set(pde6_ce, pde6, 1);
		bf_set(pde6_re, pde6, 1);
		bf_set(pde6_ae, pde6, 1);
		bf_set(pde6_ai, pde6, 1);
		bf_set(pde6_apptagval, pde6, apptagval);

1485
		/* Endianness conversion if necessary for PDE6 */
1486 1487 1488 1489
		pde6->word0 = cpu_to_le32(pde6->word0);
		pde6->word1 = cpu_to_le32(pde6->word1);
		pde6->word2 = cpu_to_le32(pde6->word2);

1490
		/* advance bpl and increment bde count */
1491 1492 1493 1494 1495 1496
		num_bde++;
		bpl++;

		/* setup the first BDE that points to protection buffer */
		prot_bde = (struct ulp_bde64 *) bpl;
		protphysaddr = sg_dma_address(sgpe);
1497 1498
		prot_bde->addrHigh = le32_to_cpu(putPaddrLow(protphysaddr));
		prot_bde->addrLow = le32_to_cpu(putPaddrHigh(protphysaddr));
1499 1500 1501 1502 1503 1504 1505 1506 1507
		protgroup_len = sg_dma_len(sgpe);

		/* must be integer multiple of the DIF block length */
		BUG_ON(protgroup_len % 8);

		protgrp_blks = protgroup_len / 8;
		protgrp_bytes = protgrp_blks * blksize;

		prot_bde->tus.f.bdeSize = protgroup_len;
1508
		prot_bde->tus.f.bdeFlags = LPFC_PDE7_DESCRIPTOR;
1509 1510 1511 1512 1513 1514 1515 1516 1517 1518
		prot_bde->tus.w = le32_to_cpu(bpl->tus.w);

		curr_prot++;
		num_bde++;

		/* setup BDE's for data blocks associated with DIF data */
		pgdone = 0;
		subtotal = 0; /* total bytes processed for current prot grp */
		while (!pgdone) {
			if (!sgde) {
1519 1520
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9065 BLKGRD:%s Invalid data segment\n",
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559
						__func__);
				return 0;
			}
			bpl++;
			dataphysaddr = sg_dma_address(sgde) + split_offset;
			bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
			bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));

			remainder = sg_dma_len(sgde) - split_offset;

			if ((subtotal + remainder) <= protgrp_bytes) {
				/* we can use this whole buffer */
				bpl->tus.f.bdeSize = remainder;
				split_offset = 0;

				if ((subtotal + remainder) == protgrp_bytes)
					pgdone = 1;
			} else {
				/* must split this buffer with next prot grp */
				bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
				split_offset += bpl->tus.f.bdeSize;
			}

			subtotal += bpl->tus.f.bdeSize;

			if (datadir == DMA_TO_DEVICE)
				bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
			else
				bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
			bpl->tus.w = le32_to_cpu(bpl->tus.w);

			num_bde++;
			curr_data++;

			if (split_offset)
				break;

			/* Move to the next s/g segment if possible */
			sgde = sg_next(sgde);
1560

1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574
		}

		/* are we done ? */
		if (curr_prot == protcnt) {
			alldone = 1;
		} else if (curr_prot < protcnt) {
			/* advance to next prot buffer */
			sgpe = sg_next(sgpe);
			bpl++;

			/* update the reference tag */
			reftag += protgrp_blks;
		} else {
			/* if we're here, we have a bug */
1575 1576
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9054 BLKGRD: bug in %s\n", __func__);
1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656
		}

	} while (!alldone);

out:

	return num_bde;
}
/*
 * Given a SCSI command that supports DIF, determine composition of protection
 * groups involved in setting up buffer lists
 *
 * Returns:
 *			      for DIF (for both read and write)
 * */
static int
lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
{
	int ret = LPFC_PG_TYPE_INVALID;
	unsigned char op = scsi_get_prot_op(sc);

	switch (op) {
	case SCSI_PROT_READ_STRIP:
	case SCSI_PROT_WRITE_INSERT:
		ret = LPFC_PG_TYPE_NO_DIF;
		break;
	case SCSI_PROT_READ_INSERT:
	case SCSI_PROT_WRITE_STRIP:
	case SCSI_PROT_READ_PASS:
	case SCSI_PROT_WRITE_PASS:
		ret = LPFC_PG_TYPE_DIF_BUF;
		break;
	default:
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"9021 Unsupported protection op:%d\n", op);
		break;
	}

	return ret;
}

/*
 * This is the protection/DIF aware version of
 * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
 * two functions eventually, but for now, it's here
 */
static int
lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba,
		struct lpfc_scsi_buf *lpfc_cmd)
{
	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
	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;
	uint32_t num_bde = 0;
	int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
	int prot_group_type = 0;
	int diflen, fcpdl;
	unsigned blksize;

	/*
	 * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
	 *  fcp_rsp regions to the first data bde entry
	 */
	bpl += 2;
	if (scsi_sg_count(scsi_cmnd)) {
		/*
		 * 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.
		 */
		datasegcnt = dma_map_sg(&phba->pcidev->dev,
					scsi_sglist(scsi_cmnd),
					scsi_sg_count(scsi_cmnd), datadir);
		if (unlikely(!datasegcnt))
			return 1;

		lpfc_cmd->seg_cnt = datasegcnt;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1657 1658 1659 1660
			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9067 BLKGRD: %s: Too many sg segments"
					" from dma_map_sg.  Config %d, seg_cnt"
					" %d\n",
1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672
					__func__, phba->cfg_sg_seg_cnt,
					lpfc_cmd->seg_cnt);
			scsi_dma_unmap(scsi_cmnd);
			return 1;
		}

		prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);

		switch (prot_group_type) {
		case LPFC_PG_TYPE_NO_DIF:
			num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
					datasegcnt);
1673
			/* we should have 2 or more entries in buffer list */
1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693
			if (num_bde < 2)
				goto err;
			break;
		case LPFC_PG_TYPE_DIF_BUF:{
			/*
			 * This type indicates that protection buffers are
			 * passed to the driver, so that needs to be prepared
			 * for DMA
			 */
			protsegcnt = dma_map_sg(&phba->pcidev->dev,
					scsi_prot_sglist(scsi_cmnd),
					scsi_prot_sg_count(scsi_cmnd), datadir);
			if (unlikely(!protsegcnt)) {
				scsi_dma_unmap(scsi_cmnd);
				return 1;
			}

			lpfc_cmd->prot_seg_cnt = protsegcnt;
			if (lpfc_cmd->prot_seg_cnt
			    > phba->cfg_prot_sg_seg_cnt) {
1694 1695 1696
				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
					"9068 BLKGRD: %s: Too many prot sg "
					"segments from dma_map_sg.  Config %d,"
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709
						"prot_seg_cnt %d\n", __func__,
						phba->cfg_prot_sg_seg_cnt,
						lpfc_cmd->prot_seg_cnt);
				dma_unmap_sg(&phba->pcidev->dev,
					     scsi_prot_sglist(scsi_cmnd),
					     scsi_prot_sg_count(scsi_cmnd),
					     datadir);
				scsi_dma_unmap(scsi_cmnd);
				return 1;
			}

			num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
					datasegcnt, protsegcnt);
1710
			/* we should have 3 or more entries in buffer list */
1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754
			if (num_bde < 3)
				goto err;
			break;
		}
		case LPFC_PG_TYPE_INVALID:
		default:
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"9022 Unexpected protection group %i\n",
					prot_group_type);
			return 1;
		}
	}

	/*
	 * 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;

	fcpdl = scsi_bufflen(scsi_cmnd);

	if (scsi_get_prot_type(scsi_cmnd) == SCSI_PROT_DIF_TYPE1) {
		/*
		 * We are in DIF Type 1 mode
		 * Every data block has a 8 byte DIF (trailer)
		 * attached to it.  Must ajust FCP data length
		 */
		blksize = lpfc_cmd_blksize(scsi_cmnd);
		diflen = (fcpdl / blksize) * 8;
		fcpdl += diflen;
	}
	fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
	iocb_cmd->un.fcpi.fcpi_parm = fcpdl;

已提交
1755
	return 0;
1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
err:
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
			"9023 Could not setup all needed BDE's"
			"prot_group_type=%d, num_bde=%d\n",
			prot_group_type, num_bde);
	return 1;
}

/*
 * This function checks for BlockGuard errors detected by
 * the HBA.  In case of errors, the ASC/ASCQ fields in the
 * sense buffer will be set accordingly, paired with
 * ILLEGAL_REQUEST to signal to the kernel that the HBA
 * detected corruption.
 *
 * Returns:
 *  0 - No error found
 *  1 - BlockGuard error found
 * -1 - Internal error (bad profile, ...etc)
 */
static int
lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd,
			struct lpfc_iocbq *pIocbOut)
{
	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
	struct sli3_bg_fields *bgf = &pIocbOut->iocb.unsli3.sli3_bg;
	int ret = 0;
	uint32_t bghm = bgf->bghm;
	uint32_t bgstat = bgf->bgstat;
	uint64_t failing_sector = 0;

1787 1788
	lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9069 BLKGRD: BG ERROR in cmd"
			" 0x%x lba 0x%llx blk cnt 0x%x "
1789
			"bgstat=0x%x bghm=0x%x\n",
1790
			cmd->cmnd[0], (unsigned long long)scsi_get_lba(cmd),
1791
			blk_rq_sectors(cmd->request), bgstat, bghm);
1792 1793 1794

	spin_lock(&_dump_buf_lock);
	if (!_dump_buf_done) {
1795 1796
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,  "9070 BLKGRD: Saving"
			" Data for %u blocks to debugfs\n",
1797
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
1798
		lpfc_debug_save_data(phba, cmd);
1799 1800 1801 1802

		/* If we have a prot sgl, save the DIF buffer */
		if (lpfc_prot_group_type(phba, cmd) ==
				LPFC_PG_TYPE_DIF_BUF) {
1803 1804 1805 1806
			lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9071 BLKGRD: "
				"Saving DIF for %u blocks to debugfs\n",
				(cmd->cmnd[7] << 8 | cmd->cmnd[8]));
			lpfc_debug_save_dif(phba, cmd);
1807 1808 1809 1810 1811 1812 1813 1814
		}

		_dump_buf_done = 1;
	}
	spin_unlock(&_dump_buf_lock);

	if (lpfc_bgs_get_invalid_prof(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
1815 1816 1817
		lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9072 BLKGRD: Invalid"
			" BlockGuard profile. bgstat:0x%x\n",
			bgstat);
1818 1819 1820 1821 1822 1823
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
		cmd->result = ScsiResult(DID_ERROR, 0);
1824 1825
		lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9073 BLKGRD: "
				"Invalid BlockGuard DIF Block. bgstat:0x%x\n",
1826 1827 1828 1829 1830 1831 1832 1833 1834 1835
				bgstat);
		ret = (-1);
		goto out;
	}

	if (lpfc_bgs_get_guard_err(bgstat)) {
		ret = 1;

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x1);
M
Martin K. Petersen 已提交
1836
		cmd->result = DRIVER_SENSE << 24
1837 1838
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);
		phba->bg_guard_err_cnt++;
1839 1840
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9055 BLKGRD: guard_tag error\n");
1841 1842 1843 1844 1845 1846 1847
	}

	if (lpfc_bgs_get_reftag_err(bgstat)) {
		ret = 1;

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x3);
M
Martin K. Petersen 已提交
1848
		cmd->result = DRIVER_SENSE << 24
1849 1850 1851
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_reftag_err_cnt++;
1852 1853
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9056 BLKGRD: ref_tag error\n");
1854 1855 1856 1857 1858 1859 1860
	}

	if (lpfc_bgs_get_apptag_err(bgstat)) {
		ret = 1;

		scsi_build_sense_buffer(1, cmd->sense_buffer, ILLEGAL_REQUEST,
				0x10, 0x2);
M
Martin K. Petersen 已提交
1861
		cmd->result = DRIVER_SENSE << 24
1862 1863 1864
			| ScsiResult(DID_ABORT, SAM_STAT_CHECK_CONDITION);

		phba->bg_apptag_err_cnt++;
1865 1866
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9061 BLKGRD: app_tag error\n");
1867 1868 1869 1870 1871 1872 1873 1874 1875
	}

	if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
		/*
		 * setup sense data descriptor 0 per SPC-4 as an information
		 * field, and put the failing LBA in it
		 */
		cmd->sense_buffer[8] = 0;     /* Information */
		cmd->sense_buffer[9] = 0xa;   /* Add. length */
1876
		bghm /= cmd->device->sector_size;
1877 1878 1879 1880 1881 1882 1883 1884 1885 1886

		failing_sector = scsi_get_lba(cmd);
		failing_sector += bghm;

		put_unaligned_be64(failing_sector, &cmd->sense_buffer[10]);
	}

	if (!ret) {
		/* No error was reported - problem in FW? */
		cmd->result = ScsiResult(DID_ERROR, 0);
1887 1888
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
			"9057 BLKGRD: no errors reported!\n");
1889 1890 1891 1892
	}

out:
	return ret;
已提交
1893 1894
}

1895 1896 1897 1898 1899 1900 1901 1902 1903
/**
 * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
 * field of @lpfc_cmd for device with SLI-4 interface spec.
 *
 * Return codes:
1904 1905
 *	1 - Error
 *	0 - Success
1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946
 **/
static int
lpfc_scsi_prep_dma_buf_s4(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 sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->fcp_bpl;
	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
	dma_addr_t physaddr;
	uint32_t num_bde = 0;
	uint32_t dma_len;
	uint32_t dma_offset = 0;
	int nseg;

	/*
	 * 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_sg_count(scsi_cmnd)) {
		/*
		 * 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.
		 */

		nseg = scsi_dma_map(scsi_cmnd);
		if (unlikely(!nseg))
			return 1;
		sgl += 1;
		/* clear the last flag in the fcp_rsp map entry */
		sgl->word2 = le32_to_cpu(sgl->word2);
		bf_set(lpfc_sli4_sge_last, sgl, 0);
		sgl->word2 = cpu_to_le32(sgl->word2);
		sgl += 1;

		lpfc_cmd->seg_cnt = nseg;
		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
1947 1948 1949 1950
			lpfc_printf_log(phba, KERN_ERR, LOG_BG, "9074 BLKGRD:"
				" %s: Too many sg segments from "
				"dma_map_sg.  Config %d, seg_cnt %d\n",
				__func__, phba->cfg_sg_seg_cnt,
1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975
			       lpfc_cmd->seg_cnt);
			scsi_dma_unmap(scsi_cmnd);
			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 sge's.
		 * When using SLI-3 the driver will try to fit all the BDEs into
		 * the IOCB. If it can't then the BDEs get added to a BPL as it
		 * does for SLI-2 mode.
		 */
		scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
			physaddr = sg_dma_address(sgel);
			dma_len = sg_dma_len(sgel);
			sgl->addr_lo = cpu_to_le32(putPaddrLow(physaddr));
			sgl->addr_hi = cpu_to_le32(putPaddrHigh(physaddr));
			if ((num_bde + 1) == nseg)
				bf_set(lpfc_sli4_sge_last, sgl, 1);
			else
				bf_set(lpfc_sli4_sge_last, sgl, 0);
			bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
			sgl->word2 = cpu_to_le32(sgl->word2);
1976
			sgl->sge_len = cpu_to_le32(dma_len);
1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003
			dma_offset += dma_len;
			sgl++;
		}
	} else {
		sgl += 1;
		/* clear the last flag in the fcp_rsp map entry */
		sgl->word2 = le32_to_cpu(sgl->word2);
		bf_set(lpfc_sli4_sge_last, sgl, 1);
		sgl->word2 = cpu_to_le32(sgl->word2);
	}

	/*
	 * Finish initializing those IOCB fields that are dependent on the
	 * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
	 * explicitly reinitialized.
	 * all iocb memory resources are reused.
	 */
	fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));

	/*
	 * Due to difference in data length between DIF/non-DIF paths,
	 * we need to set word 4 of IOCB here
	 */
	iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
	return 0;
}

2004 2005 2006 2007 2008 2009 2010 2011 2012
/**
 * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
 * @phba: The Hba for which this call is being executed.
 * @lpfc_cmd: The scsi buffer which is going to be mapped.
 *
 * This routine wraps the actual DMA mapping function pointer from the
 * lpfc_hba struct.
 *
 * Return codes:
2013 2014
 *	1 - Error
 *	0 - Success
2015 2016 2017 2018 2019 2020 2021
 **/
static inline int
lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
{
	return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
}

2022
/**
2023
 * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043
 * @phba: Pointer to hba context object.
 * @vport: Pointer to vport object.
 * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
 * @rsp_iocb: Pointer to response iocb object which reported error.
 *
 * This function posts an event when there is a SCSI command reporting
 * error from the scsi device.
 **/
static void
lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
		struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb) {
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
	struct lpfc_fast_path_event *fast_path_evt = NULL;
	struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
	unsigned long flags;

2044 2045 2046
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115
	/* If there is queuefull or busy condition send a scsi event */
	if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
		(cmnd->result == SAM_STAT_BUSY)) {
		fast_path_evt = lpfc_alloc_fast_evt(phba);
		if (!fast_path_evt)
			return;
		fast_path_evt->un.scsi_evt.event_type =
			FC_REG_SCSI_EVENT;
		fast_path_evt->un.scsi_evt.subcategory =
		(cmnd->result == SAM_STAT_TASK_SET_FULL) ?
		LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
		fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
		memcpy(&fast_path_evt->un.scsi_evt.wwpn,
			&pnode->nlp_portname, sizeof(struct lpfc_name));
		memcpy(&fast_path_evt->un.scsi_evt.wwnn,
			&pnode->nlp_nodename, sizeof(struct lpfc_name));
	} else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
		((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
		fast_path_evt = lpfc_alloc_fast_evt(phba);
		if (!fast_path_evt)
			return;
		fast_path_evt->un.check_cond_evt.scsi_event.event_type =
			FC_REG_SCSI_EVENT;
		fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
			LPFC_EVENT_CHECK_COND;
		fast_path_evt->un.check_cond_evt.scsi_event.lun =
			cmnd->device->lun;
		memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
			&pnode->nlp_portname, sizeof(struct lpfc_name));
		memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
			&pnode->nlp_nodename, sizeof(struct lpfc_name));
		fast_path_evt->un.check_cond_evt.sense_key =
			cmnd->sense_buffer[2] & 0xf;
		fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
		fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
	} else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
		     fcpi_parm &&
		     ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
			((scsi_status == SAM_STAT_GOOD) &&
			!(resp_info & (RESID_UNDER | RESID_OVER))))) {
		/*
		 * If status is good or resid does not match with fcp_param and
		 * there is valid fcpi_parm, then there is a read_check error
		 */
		fast_path_evt = lpfc_alloc_fast_evt(phba);
		if (!fast_path_evt)
			return;
		fast_path_evt->un.read_check_error.header.event_type =
			FC_REG_FABRIC_EVENT;
		fast_path_evt->un.read_check_error.header.subcategory =
			LPFC_EVENT_FCPRDCHKERR;
		memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
			&pnode->nlp_portname, sizeof(struct lpfc_name));
		memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
			&pnode->nlp_nodename, sizeof(struct lpfc_name));
		fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
		fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
		fast_path_evt->un.read_check_error.fcpiparam =
			fcpi_parm;
	} else
		return;

	fast_path_evt->vport = vport;
	spin_lock_irqsave(&phba->hbalock, flags);
	list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
	spin_unlock_irqrestore(&phba->hbalock, flags);
	lpfc_worker_wake_up(phba);
	return;
}
2116 2117

/**
2118
 * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
2119
 * @phba: The HBA for which this call is being executed.
2120 2121 2122
 * @psb: The scsi buffer which is going to be un-mapped.
 *
 * This routine does DMA un-mapping of scatter gather list of scsi command
2123
 * field of @lpfc_cmd for device with SLI-3 interface spec.
2124
 **/
2125
static void
2126
lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
2127 2128 2129 2130 2131 2132 2133
{
	/*
	 * 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.
	 */
2134 2135
	if (psb->seg_cnt > 0)
		scsi_dma_unmap(psb->pCmd);
2136 2137 2138 2139
	if (psb->prot_seg_cnt > 0)
		dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
				scsi_prot_sg_count(psb->pCmd),
				psb->pCmd->sc_data_direction);
2140 2141
}

2142
/**
2143
 * lpfc_handler_fcp_err - FCP response handler
2144 2145 2146 2147 2148 2149 2150 2151
 * @vport: The virtual port for which this call is being executed.
 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
 * @rsp_iocb: The response IOCB which contains FCP error.
 *
 * This routine is called to process response IOCB with status field
 * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
 * based upon SCSI and FCP error.
 **/
已提交
2152
static void
J
James Smart 已提交
2153 2154
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
		    struct lpfc_iocbq *rsp_iocb)
已提交
2155 2156 2157 2158
{
	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
2159
	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
已提交
2160 2161
	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
2162
	uint32_t *lp;
已提交
2163 2164
	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
2165
	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
已提交
2166

2167

已提交
2168 2169 2170 2171 2172 2173 2174 2175 2176 2177
	/*
	 *  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;
	}

2178 2179
	if (resp_info & RSP_LEN_VALID) {
		rsplen = be32_to_cpu(fcprsp->rspRspLen);
2180
		if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
2181 2182 2183 2184 2185 2186 2187 2188 2189
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "2719 Invalid response length: "
				 "tgt x%x lun x%x cmnd x%x rsplen x%x\n",
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 rsplen);
			host_status = DID_ERROR;
			goto out;
		}
2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200
		if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "2757 Protocol failure detected during "
				 "processing of FCP I/O op: "
				 "tgt x%x lun x%x cmnd x%x rspInfo3 x%x\n",
				 cmnd->device->id,
				 cmnd->device->lun, cmnd->cmnd[0],
				 fcprsp->rspInfo3);
			host_status = DID_ERROR;
			goto out;
		}
2201 2202
	}

2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216
	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;

		if (resp_info & RSP_LEN_VALID)
		  rsplen = be32_to_cpu(fcprsp->rspRspLen);
		memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
	}
	lp = (uint32_t *)cmnd->sense_buffer;

	if (!scsi_status && (resp_info & RESID_UNDER))
		logit = LOG_FCP;

2217
	lpfc_printf_vlog(vport, KERN_WARNING, logit,
2218
			 "9024 FCP command x%x failed: x%x SNS x%x x%x "
2219 2220 2221 2222 2223 2224 2225
			 "Data: x%x x%x x%x x%x x%x\n",
			 cmnd->cmnd[0], scsi_status,
			 be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
			 be32_to_cpu(fcprsp->rspResId),
			 be32_to_cpu(fcprsp->rspSnsLen),
			 be32_to_cpu(fcprsp->rspRspLen),
			 fcprsp->rspInfo3);
已提交
2226

2227
	scsi_set_resid(cmnd, 0);
已提交
2228
	if (resp_info & RESID_UNDER) {
2229
		scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
已提交
2230

2231
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2232
				 "9025 FCP Read Underrun, expected %d, "
2233 2234 2235 2236
				 "residual %d Data: x%x x%x x%x\n",
				 be32_to_cpu(fcpcmd->fcpDl),
				 scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
				 cmnd->underflow);
已提交
2237

2238 2239 2240 2241 2242 2243 2244
		/*
		 * If there is an under run check if under run reported by
		 * storage array is same as the under run reported by HBA.
		 * If this is not same, there is a dropped frame.
		 */
		if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
			fcpi_parm &&
2245
			(scsi_get_resid(cmnd) != fcpi_parm)) {
2246 2247
			lpfc_printf_vlog(vport, KERN_WARNING,
					 LOG_FCP | LOG_FCP_ERROR,
2248
					 "9026 FCP Read Check Error "
2249 2250 2251 2252
					 "and Underrun Data: x%x x%x x%x x%x\n",
					 be32_to_cpu(fcpcmd->fcpDl),
					 scsi_get_resid(cmnd), fcpi_parm,
					 cmnd->cmnd[0]);
2253
			scsi_set_resid(cmnd, scsi_bufflen(cmnd));
2254 2255
			host_status = DID_ERROR;
		}
已提交
2256 2257 2258 2259 2260 2261 2262 2263
		/*
		 * 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) &&
2264 2265
		    (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
		     < cmnd->underflow)) {
2266
			lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
2267
					 "9027 FCP command x%x residual "
2268 2269
					 "underrun converted to error "
					 "Data: x%x x%x x%x\n",
2270
					 cmnd->cmnd[0], scsi_bufflen(cmnd),
2271
					 scsi_get_resid(cmnd), cmnd->underflow);
已提交
2272 2273 2274
			host_status = DID_ERROR;
		}
	} else if (resp_info & RESID_OVER) {
2275
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2276
				 "9028 FCP command x%x residual overrun error. "
2277
				 "Data: x%x x%x\n", cmnd->cmnd[0],
2278
				 scsi_bufflen(cmnd), scsi_get_resid(cmnd));
已提交
2279 2280 2281 2282 2283 2284
		host_status = DID_ERROR;

	/*
	 * Check SLI validation that all the transfer was actually done
	 * (fcpi_parm should be zero). Apply check only to reads.
	 */
J
James Smart 已提交
2285
	} else if (fcpi_parm && (cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
2286
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
2287
				 "9029 FCP Read Check Error Data: "
J
James Smart 已提交
2288
				 "x%x x%x x%x x%x x%x\n",
2289 2290
				 be32_to_cpu(fcpcmd->fcpDl),
				 be32_to_cpu(fcprsp->rspResId),
J
James Smart 已提交
2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302
				 fcpi_parm, cmnd->cmnd[0], scsi_status);
		switch (scsi_status) {
		case SAM_STAT_GOOD:
		case SAM_STAT_CHECK_CONDITION:
			/* Fabric dropped a data frame. Fail any successful
			 * command in which we detected dropped frames.
			 * A status of good or some check conditions could
			 * be considered a successful command.
			 */
			host_status = DID_ERROR;
			break;
		}
2303
		scsi_set_resid(cmnd, scsi_bufflen(cmnd));
已提交
2304 2305 2306 2307
	}

 out:
	cmnd->result = ScsiResult(host_status, scsi_status);
2308
	lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, rsp_iocb);
已提交
2309 2310
}

2311
/**
2312
 * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
2313 2314
 * @phba: The Hba for which this call is being executed.
 * @pIocbIn: The command IOCBQ for the scsi cmnd.
2315
 * @pIocbOut: The response IOCBQ for the scsi cmnd.
2316 2317 2318 2319 2320
 *
 * This routine assigns scsi command result by looking into response IOCB
 * status field appropriately. This routine handles QUEUE FULL condition as
 * well by ramping down device queue depth.
 **/
已提交
2321 2322 2323 2324 2325 2326
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;
J
James Smart 已提交
2327
	struct lpfc_vport      *vport = pIocbIn->vport;
已提交
2328 2329
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
2330
	struct scsi_cmnd *cmd;
2331
	int result;
2332
	struct scsi_device *tmp_sdev;
2333
	int depth;
2334
	unsigned long flags;
2335
	struct lpfc_fast_path_event *fast_path_evt;
2336
	struct Scsi_Host *shost;
2337
	uint32_t queue_depth, scsi_id;
已提交
2338

2339 2340 2341 2342 2343 2344
	/* Sanity check on return of outstanding command */
	if (!(lpfc_cmd->pCmd))
		return;
	cmd = lpfc_cmd->pCmd;
	shost = cmd->device->host;

已提交
2345 2346
	lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
2347 2348 2349
	/* pick up SLI4 exhange busy status from HBA */
	lpfc_cmd->exch_busy = pIocbOut->iocb_flag & LPFC_EXCHANGE_BUSY;

2350 2351
	if (pnode && NLP_CHK_NODE_ACT(pnode))
		atomic_dec(&pnode->cmd_pending);
已提交
2352 2353 2354 2355 2356 2357 2358 2359

	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;

2360
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
2361
				 "9030 FCP cmd x%x failed <%d/%d> "
2362 2363 2364 2365 2366 2367 2368
				 "status: x%x result: x%x Data: x%x x%x\n",
				 cmd->cmnd[0],
				 cmd->device ? cmd->device->id : 0xffff,
				 cmd->device ? cmd->device->lun : 0xffff,
				 lpfc_cmd->status, lpfc_cmd->result,
				 pIocbOut->iocb.ulpContext,
				 lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
已提交
2369 2370 2371 2372

		switch (lpfc_cmd->status) {
		case IOSTAT_FCP_RSP_ERROR:
			/* Call FCP RSP handler to determine result */
J
James Smart 已提交
2373
			lpfc_handle_fcp_err(vport, lpfc_cmd, pIocbOut);
已提交
2374 2375 2376
			break;
		case IOSTAT_NPORT_BSY:
		case IOSTAT_FABRIC_BSY:
2377
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401
			fast_path_evt = lpfc_alloc_fast_evt(phba);
			if (!fast_path_evt)
				break;
			fast_path_evt->un.fabric_evt.event_type =
				FC_REG_FABRIC_EVENT;
			fast_path_evt->un.fabric_evt.subcategory =
				(lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
				LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
			if (pnode && NLP_CHK_NODE_ACT(pnode)) {
				memcpy(&fast_path_evt->un.fabric_evt.wwpn,
					&pnode->nlp_portname,
					sizeof(struct lpfc_name));
				memcpy(&fast_path_evt->un.fabric_evt.wwnn,
					&pnode->nlp_nodename,
					sizeof(struct lpfc_name));
			}
			fast_path_evt->vport = vport;
			fast_path_evt->work_evt.evt =
				LPFC_EVT_FASTPATH_MGMT_EVT;
			spin_lock_irqsave(&phba->hbalock, flags);
			list_add_tail(&fast_path_evt->work_evt.evt_listp,
				&phba->work_list);
			spin_unlock_irqrestore(&phba->hbalock, flags);
			lpfc_worker_wake_up(phba);
已提交
2402
			break;
2403
		case IOSTAT_LOCAL_REJECT:
2404
			if (lpfc_cmd->result == IOERR_INVALID_RPI ||
2405
			    lpfc_cmd->result == IOERR_NO_RESOURCES ||
2406 2407
			    lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
			    lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
2408
				cmd->result = ScsiResult(DID_REQUEUE, 0);
2409
				break;
2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426
			}

			if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
			     lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
			     pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
				if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
					/*
					 * This is a response for a BG enabled
					 * cmd. Parse BG error
					 */
					lpfc_parse_bg_err(phba, lpfc_cmd,
							pIocbOut);
					break;
				} else {
					lpfc_printf_vlog(vport, KERN_WARNING,
							LOG_BG,
							"9031 non-zero BGSTAT "
2427
							"on unprotected cmd\n");
2428 2429 2430 2431
				}
			}

		/* else: fall through */
已提交
2432 2433 2434 2435 2436
		default:
			cmd->result = ScsiResult(DID_ERROR, 0);
			break;
		}

2437
		if (!pnode || !NLP_CHK_NODE_ACT(pnode)
2438
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
2439 2440
			cmd->result = ScsiResult(DID_TRANSPORT_DISRUPTED,
						 SAM_STAT_BUSY);
已提交
2441 2442 2443 2444 2445 2446 2447
	} else {
		cmd->result = ScsiResult(DID_OK, 0);
	}

	if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
		uint32_t *lp = (uint32_t *)cmd->sense_buffer;

2448 2449 2450 2451 2452 2453
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0710 Iodone <%d/%d> cmd %p, error "
				 "x%x SNS x%x x%x Data: x%x x%x\n",
				 cmd->device->id, cmd->device->lun, cmd,
				 cmd->result, *lp, *(lp + 3), cmd->retries,
				 scsi_get_resid(cmd));
已提交
2454 2455
	}

2456
	lpfc_update_stats(phba, lpfc_cmd);
2457
	result = cmd->result;
2458 2459 2460
	if (vport->cfg_max_scsicmpl_time &&
	   time_after(jiffies, lpfc_cmd->start_time +
		msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
2461
		spin_lock_irqsave(shost->host_lock, flags);
2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473
		if (pnode && NLP_CHK_NODE_ACT(pnode)) {
			if (pnode->cmd_qdepth >
				atomic_read(&pnode->cmd_pending) &&
				(atomic_read(&pnode->cmd_pending) >
				LPFC_MIN_TGT_QDEPTH) &&
				((cmd->cmnd[0] == READ_10) ||
				(cmd->cmnd[0] == WRITE_10)))
				pnode->cmd_qdepth =
					atomic_read(&pnode->cmd_pending);

			pnode->last_change_time = jiffies;
		}
2474
		spin_unlock_irqrestore(shost->host_lock, flags);
2475
	} else if (pnode && NLP_CHK_NODE_ACT(pnode)) {
2476
		if ((pnode->cmd_qdepth < vport->cfg_tgt_queue_depth) &&
2477
		   time_after(jiffies, pnode->last_change_time +
2478
			      msecs_to_jiffies(LPFC_TGTQ_INTERVAL))) {
2479
			spin_lock_irqsave(shost->host_lock, flags);
2480 2481 2482 2483 2484 2485
			depth = pnode->cmd_qdepth * LPFC_TGTQ_RAMPUP_PCENT
				/ 100;
			depth = depth ? depth : 1;
			pnode->cmd_qdepth += depth;
			if (pnode->cmd_qdepth > vport->cfg_tgt_queue_depth)
				pnode->cmd_qdepth = vport->cfg_tgt_queue_depth;
2486
			pnode->last_change_time = jiffies;
2487
			spin_unlock_irqrestore(shost->host_lock, flags);
2488
		}
2489 2490
	}

2491
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
2492 2493 2494 2495

	/* The sdev is not guaranteed to be valid post scsi_done upcall. */
	queue_depth = cmd->device->queue_depth;
	scsi_id = cmd->device->id;
2496 2497
	cmd->scsi_done(cmd);

2498
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2499 2500 2501 2502
		/*
		 * If there is a thread waiting for command completion
		 * wake up the thread.
		 */
2503
		spin_lock_irqsave(shost->host_lock, flags);
2504
		lpfc_cmd->pCmd = NULL;
2505 2506
		if (lpfc_cmd->waitq)
			wake_up(lpfc_cmd->waitq);
2507
		spin_unlock_irqrestore(shost->host_lock, flags);
2508 2509 2510 2511
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return;
	}

2512
	if (!result)
2513
		lpfc_rampup_queue_depth(vport, queue_depth);
2514

2515 2516 2517 2518
	/*
	 * Check for queue full.  If the lun is reporting queue full, then
	 * back off the lun queue depth to prevent target overloads.
	 */
2519 2520
	if (result == SAM_STAT_TASK_SET_FULL && pnode &&
	    NLP_CHK_NODE_ACT(pnode)) {
2521 2522
		shost_for_each_device(tmp_sdev, shost) {
			if (tmp_sdev->id != scsi_id)
2523 2524
				continue;
			depth = scsi_track_queue_full(tmp_sdev,
2525 2526 2527
						      tmp_sdev->queue_depth-1);
			if (depth <= 0)
				continue;
2528 2529 2530
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
					 "0711 detected queue full - lun queue "
					 "depth adjusted to %d.\n", depth);
2531
			lpfc_send_sdev_queuedepth_change_event(phba, vport,
2532 2533 2534
							       pnode,
							       tmp_sdev->lun,
							       depth+1, depth);
2535 2536 2537
		}
	}

2538 2539 2540 2541
	/*
	 * If there is a thread waiting for command completion
	 * wake up the thread.
	 */
2542
	spin_lock_irqsave(shost->host_lock, flags);
2543
	lpfc_cmd->pCmd = NULL;
2544 2545
	if (lpfc_cmd->waitq)
		wake_up(lpfc_cmd->waitq);
2546
	spin_unlock_irqrestore(shost->host_lock, flags);
2547

2548
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
2549 2550
}

2551
/**
2552
 * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568
 * @data: A pointer to the immediate command data portion of the IOCB.
 * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
 *
 * The routine copies the entire FCP command from @fcp_cmnd to @data while
 * byte swapping the data to big endian format for transmission on the wire.
 **/
static void
lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
{
	int i, j;
	for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
	     i += sizeof(uint32_t), j++) {
		((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
	}
}

2569
/**
2570
 * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
2571 2572 2573 2574 2575
 * @vport: The virtual port for which this call is being executed.
 * @lpfc_cmd: The scsi command which needs to send.
 * @pnode: Pointer to lpfc_nodelist.
 *
 * This routine initializes fcp_cmnd and iocb data structure from scsi command
2576
 * to transfer for device with SLI3 interface spec.
2577
 **/
已提交
2578
static void
2579
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
J
James Smart 已提交
2580
		    struct lpfc_nodelist *pnode)
已提交
2581
{
J
James Smart 已提交
2582
	struct lpfc_hba *phba = vport->phba;
已提交
2583 2584 2585 2586 2587
	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;
2588
	char tag[2];
已提交
2589

2590 2591 2592
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
		return;

已提交
2593
	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
2594 2595
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
2596

2597 2598
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
2599 2600 2601

	memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);

2602 2603
	if (scsi_populate_tag_msg(scsi_cmnd, tag)) {
		switch (tag[0]) {
已提交
2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622
		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.
	 */
2623
	if (scsi_sg_count(scsi_cmnd)) {
已提交
2624 2625
		if (datadir == DMA_TO_DEVICE) {
			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
2626 2627 2628 2629 2630
			if (phba->sli_rev < LPFC_SLI_REV4) {
				iocb_cmd->un.fcpi.fcpi_parm = 0;
				iocb_cmd->ulpPU = 0;
			} else
				iocb_cmd->ulpPU = PARM_READ_CHECK;
已提交
2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645
			fcp_cmnd->fcpCntl3 = WRITE_DATA;
			phba->fc4OutputRequests++;
		} else {
			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
			iocb_cmd->ulpPU = PARM_READ_CHECK;
			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++;
	}
2646 2647
	if (phba->sli_rev == 3 &&
	    !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2648
		lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
2649 2650 2651 2652 2653 2654 2655
	/*
	 * 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;
2656 2657
	else
		piocbq->iocb.ulpFCP2Rcvy = 0;
已提交
2658 2659 2660 2661 2662

	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;
J
James Smart 已提交
2663
	piocbq->vport = vport;
已提交
2664 2665
}

2666
/**
2667
 * lpfc_scsi_prep_task_mgmt_cmnd - Convert SLI3 scsi TM cmd to FCP info unit
2668 2669 2670 2671 2672
 * @vport: The virtual port for which this call is being executed.
 * @lpfc_cmd: Pointer to lpfc_scsi_buf data structure.
 * @lun: Logical unit number.
 * @task_mgmt_cmd: SCSI task management command.
 *
2673 2674
 * This routine creates FCP information unit corresponding to @task_mgmt_cmd
 * for device with SLI-3 interface spec.
2675 2676 2677 2678 2679
 *
 * Return codes:
 *   0 - Error
 *   1 - Success
 **/
已提交
2680
static int
2681
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
已提交
2682
			     struct lpfc_scsi_buf *lpfc_cmd,
2683
			     unsigned int lun,
已提交
2684 2685 2686 2687 2688
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
2689
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
2690 2691
	struct lpfc_nodelist *ndlp = rdata->pnode;

2692 2693
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
	    ndlp->nlp_state != NLP_STE_MAPPED_NODE)
已提交
2694 2695 2696
		return 0;

	piocbq = &(lpfc_cmd->cur_iocbq);
J
James Smart 已提交
2697 2698
	piocbq->vport = vport;

已提交
2699 2700 2701
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
2702 2703 2704
	/* Clear out any old data in the FCP command area */
	memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
	int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
已提交
2705
	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
2706 2707
	if (vport->phba->sli_rev == 3 &&
	    !(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
2708
		lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
已提交
2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722
	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;
2723
	} else
已提交
2724
		piocb->ulpTimeout = lpfc_cmd->timeout;
2725

2726 2727
	if (vport->phba->sli_rev == LPFC_SLI_REV4)
		lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
2728

2729
	return 1;
2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744
}

/**
 * lpfc_scsi_api_table_setup - Set up scsi api fucntion jump table
 * @phba: The hba struct for which this call is being executed.
 * @dev_grp: The HBA PCI-Device group number.
 *
 * This routine sets up the SCSI interface API function jump table in @phba
 * struct.
 * Returns: 0 - success, -ENODEV - failure.
 **/
int
lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
{

2745 2746 2747 2748
	phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
	phba->lpfc_scsi_prep_cmnd = lpfc_scsi_prep_cmnd;
	phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;

2749 2750 2751 2752 2753 2754
	switch (dev_grp) {
	case LPFC_PCI_DEV_LP:
		phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s3;
		phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
		break;
2755 2756 2757 2758 2759
	case LPFC_PCI_DEV_OC:
		phba->lpfc_new_scsi_buf = lpfc_new_scsi_buf_s4;
		phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
		phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
		break;
2760 2761 2762 2763 2764 2765 2766 2767 2768
	default:
		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
				"1418 Invalid HBA PCI-device group: 0x%x\n",
				dev_grp);
		return -ENODEV;
		break;
	}
	phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;
	phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
2769
	phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
2770 2771 2772
	return 0;
}

2773
/**
2774
 * lpfc_taskmgmt_def_cmpl - IOCB completion routine for task management command
2775 2776 2777 2778 2779 2780 2781
 * @phba: The Hba for which this call is being executed.
 * @cmdiocbq: Pointer to lpfc_iocbq data structure.
 * @rspiocbq: Pointer to lpfc_iocbq data structure.
 *
 * This routine is IOCB completion routine for device reset and target reset
 * routine. This routine release scsi buffer associated with lpfc_cmd.
 **/
2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793
static void
lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
			struct lpfc_iocbq *cmdiocbq,
			struct lpfc_iocbq *rspiocbq)
{
	struct lpfc_scsi_buf *lpfc_cmd =
		(struct lpfc_scsi_buf *) cmdiocbq->context1;
	if (lpfc_cmd)
		lpfc_release_scsi_buf(phba, lpfc_cmd);
	return;
}

2794
/**
2795
 * lpfc_info - Info entry point of scsi_host_template data structure
2796 2797 2798 2799 2800 2801 2802
 * @host: The scsi host for which this call is being executed.
 *
 * This routine provides module information about hba.
 *
 * Reutrn code:
 *   Pointer to char - Success.
 **/
已提交
2803 2804 2805
const char *
lpfc_info(struct Scsi_Host *host)
{
J
James Smart 已提交
2806 2807
	struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827
	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);
		}
2828 2829 2830 2831 2832 2833 2834
		len = strlen(lpfcinfobuf);
		if (phba->sli4_hba.link_state.logical_speed) {
			snprintf(lpfcinfobuf + len,
				 384-len,
				 " Logical Link Speed: %d Mbps",
				 phba->sli4_hba.link_state.logical_speed * 10);
		}
已提交
2835 2836 2837 2838
	}
	return lpfcinfobuf;
}

2839
/**
2840
 * lpfc_poll_rearm_time - Routine to modify fcp_poll timer of hba
2841 2842 2843 2844 2845
 * @phba: The Hba for which this call is being executed.
 *
 * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
 * The default value of cfg_poll_tmo is 10 milliseconds.
 **/
2846 2847 2848 2849 2850 2851 2852 2853 2854 2855
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);
}

2856
/**
2857
 * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
2858 2859 2860 2861
 * @phba: The Hba for which this call is being executed.
 *
 * This routine starts the fcp_poll_timer of @phba.
 **/
2862 2863 2864 2865 2866
void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

2867
/**
2868
 * lpfc_poll_timeout - Restart polling timer
2869 2870 2871 2872 2873 2874
 * @ptr: Map to lpfc_hba data structure pointer.
 *
 * This routine restarts fcp_poll timer, when FCP ring  polling is enable
 * and FCP Ring interrupt is disable.
 **/

2875 2876
void lpfc_poll_timeout(unsigned long ptr)
{
J
James Smart 已提交
2877
	struct lpfc_hba *phba = (struct lpfc_hba *) ptr;
2878 2879

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
2880 2881 2882
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);

2883 2884 2885 2886 2887
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}
}

2888
/**
2889
 * lpfc_queuecommand - scsi_host_template queuecommand entry point
2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900
 * @cmnd: Pointer to scsi_cmnd data structure.
 * @done: Pointer to done routine.
 *
 * Driver registers this routine to scsi midlayer to submit a @cmd to process.
 * This routine prepares an IOCB from scsi command and provides to firmware.
 * The @done callback is invoked after driver finished processing the command.
 *
 * Return value :
 *   0 - Success
 *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
 **/
已提交
2901 2902 2903
static int
lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
J
James Smart 已提交
2904 2905 2906
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
2907
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
2908
	struct lpfc_nodelist *ndlp;
2909
	struct lpfc_scsi_buf *lpfc_cmd;
2910 2911
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
2912

2913 2914 2915
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
2916 2917
		goto out_fail_command;
	}
2918
	ndlp = rdata->pnode;
已提交
2919

2920 2921 2922
	if (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
		scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {

2923 2924 2925 2926
		lpfc_printf_log(phba, KERN_ERR, LOG_BG,
				"9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
				" op:%02x str=%s without registering for"
				" BlockGuard - Rejecting command\n",
2927 2928 2929 2930 2931
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
		goto out_fail_command;
	}

已提交
2932
	/*
2933 2934
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
2935
	 */
2936 2937 2938 2939
	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
		cmnd->result = ScsiResult(DID_TRANSPORT_DISRUPTED, 0);
		goto out_fail_command;
	}
2940
	if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth)
2941
		goto out_host_busy;
2942

2943
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
2944
	if (lpfc_cmd == NULL) {
2945
		lpfc_rampdown_queue_depth(phba);
2946

2947 2948 2949
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
				 "0707 driver's buffer pool is empty, "
				 "IO busied\n");
已提交
2950 2951 2952 2953 2954 2955 2956 2957 2958 2959
		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;
2960
	lpfc_cmd->start_time = jiffies;
已提交
2961 2962 2963
	cmnd->host_scribble = (unsigned char *)lpfc_cmd;
	cmnd->scsi_done = done;

2964
	if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
2965 2966
		if (vport->phba->cfg_enable_bg) {
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2967 2968 2969 2970
				"9033 BLKGRD: rcvd protected cmd:%02x op:%02x "
				"str=%s\n",
				cmnd->cmnd[0], scsi_get_prot_op(cmnd),
				dif_op_str[scsi_get_prot_op(cmnd)]);
2971
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2972
				"9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
2973
				"%02x %02x %02x %02x %02x\n",
2974 2975 2976 2977
				cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
				cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
				cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
				cmnd->cmnd[9]);
2978 2979
			if (cmnd->cmnd[0] == READ_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2980
					"9035 BLKGRD: READ @ sector %llu, "
2981 2982 2983
					"count %u\n",
					(unsigned long long)scsi_get_lba(cmnd),
					blk_rq_sectors(cmnd->request));
2984 2985
			else if (cmnd->cmnd[0] == WRITE_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2986
					"9036 BLKGRD: WRITE @ sector %llu, "
2987
					"count %u cmd=%p\n",
2988
					(unsigned long long)scsi_get_lba(cmnd),
2989
					blk_rq_sectors(cmnd->request),
2990
					cmnd);
2991
		}
2992 2993 2994

		err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
	} else {
2995
		if (vport->phba->cfg_enable_bg) {
2996
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013
					"9038 BLKGRD: rcvd unprotected cmd:"
					"%02x op:%02x str=%s\n",
					cmnd->cmnd[0], scsi_get_prot_op(cmnd),
					dif_op_str[scsi_get_prot_op(cmnd)]);
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					"9039 BLKGRD: CDB: %02x %02x %02x "
					"%02x %02x %02x %02x %02x %02x %02x\n",
					cmnd->cmnd[0], cmnd->cmnd[1],
					cmnd->cmnd[2], cmnd->cmnd[3],
					cmnd->cmnd[4], cmnd->cmnd[5],
					cmnd->cmnd[6], cmnd->cmnd[7],
					cmnd->cmnd[8], cmnd->cmnd[9]);
			if (cmnd->cmnd[0] == READ_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
					"9040 dbg: READ @ sector %llu, "
					"count %u\n",
					(unsigned long long)scsi_get_lba(cmnd),
3014
					 blk_rq_sectors(cmnd->request));
3015 3016
			else if (cmnd->cmnd[0] == WRITE_10)
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3017
					 "9041 dbg: WRITE @ sector %llu, "
3018
					 "count %u cmd=%p\n",
3019
					 (unsigned long long)scsi_get_lba(cmnd),
3020
					 blk_rq_sectors(cmnd->request), cmnd);
3021 3022
			else
				lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
3023
					 "9042 dbg: parser not implemented\n");
3024
		}
3025 3026 3027
		err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
	}

已提交
3028 3029 3030
	if (err)
		goto out_host_busy_free_buf;

J
James Smart 已提交
3031
	lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
已提交
3032

3033
	atomic_inc(&ndlp->cmd_pending);
3034
	err = lpfc_sli_issue_iocb(phba, LPFC_FCP_RING,
3035
				  &lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
3036 3037
	if (err) {
		atomic_dec(&ndlp->cmd_pending);
已提交
3038
		goto out_host_busy_free_buf;
3039
	}
3040
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3041 3042 3043 3044 3045
		spin_unlock(shost->host_lock);
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);

		spin_lock(shost->host_lock);
3046 3047 3048 3049
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
3050 3051 3052
	return 0;

 out_host_busy_free_buf:
3053
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
3054
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
3055 3056 3057 3058 3059 3060 3061 3062
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

 out_fail_command:
	done(cmnd);
	return 0;
}

3063
/**
3064
 * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
3065 3066 3067 3068 3069 3070 3071 3072
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine aborts @cmnd pending in base driver.
 *
 * Return code :
 *   0x2003 - Error
 *   0x2002 - Success
 **/
已提交
3073
static int
3074
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
3075
{
J
James Smart 已提交
3076 3077 3078
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_hba   *phba = vport->phba;
3079 3080
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
3081 3082
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
3083
	int ret = SUCCESS;
3084
	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
已提交
3085

3086 3087 3088
	ret = fc_block_scsi_eh(cmnd);
	if (ret)
		return ret;
3089
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
J
James Smart 已提交
3090 3091 3092 3093 3094 3095 3096 3097
	if (!lpfc_cmd) {
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "2873 SCSI Layer I/O Abort Request IO CMPL Status "
			 "x%x ID %d "
			 "LUN %d snum %#lx\n", ret, cmnd->device->id,
			 cmnd->device->lun, cmnd->serial_number);
		return SUCCESS;
	}
已提交
3098

3099 3100 3101 3102 3103 3104 3105 3106 3107 3108
	/*
	 * 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;
已提交
3109

3110
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
3111

3112 3113 3114
	abtsiocb = lpfc_sli_get_iocbq(phba);
	if (abtsiocb == NULL) {
		ret = FAILED;
已提交
3115 3116 3117 3118
		goto out;
	}

	/*
3119 3120 3121
	 * 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.
已提交
3122 3123
	 */

3124 3125 3126 3127
	cmd = &iocb->iocb;
	icmd = &abtsiocb->iocb;
	icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
	icmd->un.acxri.abortContextTag = cmd->ulpContext;
3128 3129 3130 3131
	if (phba->sli_rev == LPFC_SLI_REV4)
		icmd->un.acxri.abortIoTag = iocb->sli4_xritag;
	else
		icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
已提交
3132

3133 3134
	icmd->ulpLe = 1;
	icmd->ulpClass = cmd->ulpClass;
3135 3136 3137

	/* ABTS WQE must go to the same WQ as the WQE to be aborted */
	abtsiocb->fcp_wqidx = iocb->fcp_wqidx;
3138
	abtsiocb->iocb_flag |= LPFC_USE_FCPWQIDX;
3139

J
James Smart 已提交
3140
	if (lpfc_is_link_up(phba))
3141 3142 3143
		icmd->ulpCommand = CMD_ABORT_XRI_CN;
	else
		icmd->ulpCommand = CMD_CLOSE_XRI_CN;
已提交
3144

3145
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
J
James Smart 已提交
3146
	abtsiocb->vport = vport;
3147 3148
	if (lpfc_sli_issue_iocb(phba, LPFC_FCP_RING, abtsiocb, 0) ==
	    IOCB_ERROR) {
3149 3150 3151 3152
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
3153

3154
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
3155 3156
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3157

3158
	lpfc_cmd->waitq = &waitq;
3159
	/* Wait for abort to complete */
3160 3161 3162
	wait_event_timeout(waitq,
			  (lpfc_cmd->pCmd != cmnd),
			   (2*vport->cfg_devloss_tmo*HZ));
3163

3164 3165 3166
	spin_lock_irq(shost->host_lock);
	lpfc_cmd->waitq = NULL;
	spin_unlock_irq(shost->host_lock);
已提交
3167

3168 3169
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
3170 3171 3172 3173 3174 3175
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
				 "0748 abort handler timed out waiting "
				 "for abort to complete: ret %#x, ID %d, "
				 "LUN %d, snum %#lx\n",
				 ret, cmnd->device->id, cmnd->device->lun,
				 cmnd->serial_number);
已提交
3176 3177 3178
	}

 out:
3179 3180 3181 3182
	lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
			 "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
			 "LUN %d snum %#lx\n", ret, cmnd->device->id,
			 cmnd->device->lun, cmnd->serial_number);
3183
	return ret;
3184 3185
}

3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208
static char *
lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
{
	switch (task_mgmt_cmd) {
	case FCP_ABORT_TASK_SET:
		return "ABORT_TASK_SET";
	case FCP_CLEAR_TASK_SET:
		return "FCP_CLEAR_TASK_SET";
	case FCP_BUS_RESET:
		return "FCP_BUS_RESET";
	case FCP_LUN_RESET:
		return "FCP_LUN_RESET";
	case FCP_TARGET_RESET:
		return "FCP_TARGET_RESET";
	case FCP_CLEAR_ACA:
		return "FCP_CLEAR_ACA";
	case FCP_TERMINATE_TASK:
		return "FCP_TERMINATE_TASK";
	default:
		return "unknown";
	}
}

3209
/**
3210 3211 3212 3213 3214 3215
 * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
 * @vport: The virtual port for which this call is being executed.
 * @rdata: Pointer to remote port local data
 * @tgt_id: Target ID of remote device.
 * @lun_id: Lun number for the TMF
 * @task_mgmt_cmd: type of TMF to send
3216
 *
3217 3218
 * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
 * a remote port.
3219
 *
3220 3221 3222
 * Return Code:
 *   0x2003 - Error
 *   0x2002 - Success.
3223
 **/
已提交
3224
static int
3225 3226 3227
lpfc_send_taskmgmt(struct lpfc_vport *vport, struct lpfc_rport_data *rdata,
		    unsigned  tgt_id, unsigned int lun_id,
		    uint8_t task_mgmt_cmd)
已提交
3228
{
J
James Smart 已提交
3229
	struct lpfc_hba   *phba = vport->phba;
3230
	struct lpfc_scsi_buf *lpfc_cmd;
3231 3232
	struct lpfc_iocbq *iocbq;
	struct lpfc_iocbq *iocbqrsp;
3233
	struct lpfc_nodelist *pnode = rdata->pnode;
3234
	int ret;
3235
	int status;
已提交
3236

3237
	if (!pnode || !NLP_CHK_NODE_ACT(pnode))
3238
		return FAILED;
3239

J
James Smart 已提交
3240
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
3241
	if (lpfc_cmd == NULL)
3242
		return FAILED;
已提交
3243
	lpfc_cmd->timeout = 60;
3244
	lpfc_cmd->rdata = rdata;
已提交
3245

3246 3247
	status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
					   task_mgmt_cmd);
3248 3249 3250 3251
	if (!status) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
已提交
3252

3253
	iocbq = &lpfc_cmd->cur_iocbq;
3254
	iocbqrsp = lpfc_sli_get_iocbq(phba);
3255 3256 3257 3258
	if (iocbqrsp == NULL) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return FAILED;
	}
3259

3260
	lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
3261 3262 3263
			 "0702 Issue %s to TGT %d LUN %d "
			 "rpi x%x nlp_flag x%x\n",
			 lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
3264
			 pnode->nlp_rpi, pnode->nlp_flag);
3265

3266
	status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
3267
					  iocbq, iocbqrsp, lpfc_cmd->timeout);
3268 3269 3270 3271 3272
	if (status != IOCB_SUCCESS) {
		if (status == IOCB_TIMEDOUT) {
			iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
			ret = TIMEOUT_ERROR;
		} else
3273
			ret = FAILED;
3274 3275 3276 3277 3278
		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0727 TMF %s to TGT %d LUN %d failed (%d, %d)\n",
			 lpfc_taskmgmt_name(task_mgmt_cmd),
			 tgt_id, lun_id, iocbqrsp->iocb.ulpStatus,
3279
			 iocbqrsp->iocb.un.ulpWord[4]);
3280 3281 3282
	} else if (status == IOCB_BUSY)
		ret = FAILED;
	else
3283 3284
		ret = SUCCESS;

3285
	lpfc_sli_release_iocbq(phba, iocbqrsp);
3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308

	if (ret != TIMEOUT_ERROR)
		lpfc_release_scsi_buf(phba, lpfc_cmd);

	return ret;
}

/**
 * lpfc_chk_tgt_mapped -
 * @vport: The virtual port to check on
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine delays until the scsi target (aka rport) for the
 * command exists (is present and logged in) or we declare it non-existent.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct scsi_cmnd *cmnd)
{
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3309
	struct lpfc_nodelist *pnode;
3310 3311
	unsigned long later;

3312 3313 3314 3315 3316 3317
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
			"0797 Tgt Map rport failure: rdata x%p\n", rdata);
		return FAILED;
	}
	pnode = rdata->pnode;
3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364
	/*
	 * If target is not in a MAPPED state, delay until
	 * target is rediscovered or devloss timeout expires.
	 */
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies)) {
		if (!pnode || !NLP_CHK_NODE_ACT(pnode))
			return FAILED;
		if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
			return SUCCESS;
		schedule_timeout_uninterruptible(msecs_to_jiffies(500));
		rdata = cmnd->device->hostdata;
		if (!rdata)
			return FAILED;
		pnode = rdata->pnode;
	}
	if (!pnode || !NLP_CHK_NODE_ACT(pnode) ||
	    (pnode->nlp_state != NLP_STE_MAPPED_NODE))
		return FAILED;
	return SUCCESS;
}

/**
 * lpfc_reset_flush_io_context -
 * @vport: The virtual port (scsi_host) for the flush context
 * @tgt_id: If aborting by Target contect - specifies the target id
 * @lun_id: If aborting by Lun context - specifies the lun id
 * @context: specifies the context level to flush at.
 *
 * After a reset condition via TMF, we need to flush orphaned i/o
 * contexts from the adapter. This routine aborts any contexts
 * outstanding, then waits for their completions. The wait is
 * bounded by devloss_tmo though.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
			uint64_t lun_id, lpfc_ctx_cmd context)
{
	struct lpfc_hba   *phba = vport->phba;
	unsigned long later;
	int cnt;

	cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
3365
	if (cnt)
3366
		lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
3367
				    tgt_id, lun_id, context);
3368 3369 3370
	later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
	while (time_after(later, jiffies) && cnt) {
		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
3371
		cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
已提交
3372 3373
	}
	if (cnt) {
3374
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
3375 3376 3377 3378 3379 3380
			"0724 I/O flush failure for context %s : cnt x%x\n",
			((context == LPFC_CTX_LUN) ? "LUN" :
			 ((context == LPFC_CTX_TGT) ? "TGT" :
			  ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
			cnt);
		return FAILED;
已提交
3381
	}
3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401
	return SUCCESS;
}

/**
 * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does a device reset by sending a LUN_RESET task management
 * command.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3402
	struct lpfc_nodelist *pnode;
3403 3404 3405 3406 3407
	unsigned tgt_id = cmnd->device->id;
	unsigned int lun_id = cmnd->device->lun;
	struct lpfc_scsi_event_header scsi_event;
	int status;

3408 3409 3410 3411 3412 3413
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0798 Device Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}
	pnode = rdata->pnode;
3414 3415 3416
	status = fc_block_scsi_eh(cmnd);
	if (status)
		return status;
3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468

	status = lpfc_chk_tgt_mapped(vport, cmnd);
	if (status == FAILED) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0721 Device Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}

	scsi_event.event_type = FC_REG_SCSI_EVENT;
	scsi_event.subcategory = LPFC_EVENT_LUNRESET;
	scsi_event.lun = lun_id;
	memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
	memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));

	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);

	status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
						FCP_LUN_RESET);

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0713 SCSI layer issued Device Reset (%d, %d) "
			 "return x%x\n", tgt_id, lun_id, status);

	/*
	 * We have to clean up i/o as : they may be orphaned by the TMF;
	 * or if the TMF failed, they may be in an indeterminate state.
	 * So, continue on.
	 * We will report success if all the i/o aborts successfully.
	 */
	status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
						LPFC_CTX_LUN);
	return status;
}

/**
 * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
 * This routine does a target reset by sending a TARGET_RESET task management
 * command.
 *
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
 **/
static int
lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
3469
	struct lpfc_nodelist *pnode;
3470 3471 3472 3473 3474
	unsigned tgt_id = cmnd->device->id;
	unsigned int lun_id = cmnd->device->lun;
	struct lpfc_scsi_event_header scsi_event;
	int status;

3475 3476 3477 3478 3479 3480
	if (!rdata) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0799 Target Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}
	pnode = rdata->pnode;
3481 3482 3483
	status = fc_block_scsi_eh(cmnd);
	if (status)
		return status;
3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516

	status = lpfc_chk_tgt_mapped(vport, cmnd);
	if (status == FAILED) {
		lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			"0722 Target Reset rport failure: rdata x%p\n", rdata);
		return FAILED;
	}

	scsi_event.event_type = FC_REG_SCSI_EVENT;
	scsi_event.subcategory = LPFC_EVENT_TGTRESET;
	scsi_event.lun = 0;
	memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
	memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));

	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);

	status = lpfc_send_taskmgmt(vport, rdata, tgt_id, lun_id,
					FCP_TARGET_RESET);

	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0723 SCSI layer issued Target Reset (%d, %d) "
			 "return x%x\n", tgt_id, lun_id, status);

	/*
	 * We have to clean up i/o as : they may be orphaned by the TMF;
	 * or if the TMF failed, they may be in an indeterminate state.
	 * So, continue on.
	 * We will report success if all the i/o aborts successfully.
	 */
	status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
					LPFC_CTX_TGT);
	return status;
已提交
3517 3518
}

3519
/**
3520
 * lpfc_bus_reset_handler - scsi_host_template eh_bus_reset_handler entry point
3521 3522
 * @cmnd: Pointer to scsi_cmnd data structure.
 *
3523 3524
 * This routine does target reset to all targets on @cmnd->device->host.
 * This emulates Parallel SCSI Bus Reset Semantics.
3525
 *
3526 3527 3528
 * Return code :
 *  0x2003 - Error
 *  0x2002 - Success
3529
 **/
3530
static int
3531
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
已提交
3532
{
J
James Smart 已提交
3533 3534
	struct Scsi_Host  *shost = cmnd->device->host;
	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
已提交
3535
	struct lpfc_nodelist *ndlp = NULL;
3536
	struct lpfc_scsi_event_header scsi_event;
3537 3538
	int match;
	int ret = SUCCESS, status, i;
3539 3540 3541 3542 3543 3544 3545

	scsi_event.event_type = FC_REG_SCSI_EVENT;
	scsi_event.subcategory = LPFC_EVENT_BUSRESET;
	scsi_event.lun = 0;
	memcpy(scsi_event.wwpn, &vport->fc_portname, sizeof(struct lpfc_name));
	memcpy(scsi_event.wwnn, &vport->fc_nodename, sizeof(struct lpfc_name));

3546 3547
	fc_host_post_vendor_event(shost, fc_get_event_number(),
		sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
已提交
3548

3549 3550 3551
	ret = fc_block_scsi_eh(cmnd);
	if (ret)
		return ret;
3552

已提交
3553 3554 3555 3556 3557
	/*
	 * 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.
	 */
3558
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
3559
		/* Search for mapped node by target ID */
已提交
3560
		match = 0;
J
James Smart 已提交
3561 3562
		spin_lock_irq(shost->host_lock);
		list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
3563 3564
			if (!NLP_CHK_NODE_ACT(ndlp))
				continue;
3565
			if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
3566
			    ndlp->nlp_sid == i &&
3567
			    ndlp->rport) {
已提交
3568 3569 3570 3571
				match = 1;
				break;
			}
		}
J
James Smart 已提交
3572
		spin_unlock_irq(shost->host_lock);
已提交
3573 3574
		if (!match)
			continue;
3575 3576 3577 3578 3579

		status = lpfc_send_taskmgmt(vport, ndlp->rport->dd_data,
					i, 0, FCP_TARGET_RESET);

		if (status != SUCCESS) {
3580 3581 3582
			lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
					 "0700 Bus Reset on target %d failed\n",
					 i);
3583
			ret = FAILED;
已提交
3584 3585
		}
	}
3586
	/*
3587 3588 3589 3590
	 * We have to clean up i/o as : they may be orphaned by the TMFs
	 * above; or if any of the TMFs failed, they may be in an
	 * indeterminate state.
	 * We will report success if all the i/o aborts successfully.
3591
	 */
3592 3593 3594

	status = lpfc_reset_flush_io_context(vport, 0, 0, LPFC_CTX_HOST);
	if (status != SUCCESS)
3595
		ret = FAILED;
3596

3597 3598
	lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
			 "0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
已提交
3599 3600 3601
	return ret;
}

3602
/**
3603
 * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614
 * @sdev: Pointer to scsi_device.
 *
 * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
 * globally available list of scsi buffers. This routine also makes sure scsi
 * buffer is not allocated more than HBA limit conveyed to midlayer. This list
 * of scsi buffer exists for the lifetime of the driver.
 *
 * Return codes:
 *   non-0 - Error
 *   0 - Success
 **/
已提交
3615 3616 3617
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
J
James Smart 已提交
3618 3619
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
3620
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
3621
	uint32_t total = 0;
已提交
3622
	uint32_t num_to_alloc = 0;
3623
	int num_allocated = 0;
3624
	uint32_t sdev_cnt;
已提交
3625

3626
	if (!rport || fc_remote_port_chkready(rport))
已提交
3627 3628
		return -ENXIO;

3629
	sdev->hostdata = rport->dd_data;
3630
	sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
已提交
3631 3632 3633 3634

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
3635 3636 3637
	 * 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.
已提交
3638 3639
	 */
	total = phba->total_scsi_bufs;
3640
	num_to_alloc = vport->cfg_lun_queue_depth + 2;
3641

3642 3643 3644 3645
	/* If allocated buffers are enough do nothing */
	if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
		return 0;

3646 3647
	/* Allow some exchanges to be available always to complete discovery */
	if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3648 3649 3650
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0704 At limitation of %d preallocated "
				 "command buffers\n", total);
已提交
3651
		return 0;
3652 3653 3654
	/* Allow some exchanges to be available always to complete discovery */
	} else if (total + num_to_alloc >
		phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
3655 3656 3657 3658 3659 3660
		lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0705 Allocation request of %d "
				 "command buffers will exceed max of %d.  "
				 "Reducing allocation request to %d.\n",
				 num_to_alloc, phba->cfg_hba_queue_depth,
				 (phba->cfg_hba_queue_depth - total));
已提交
3661 3662
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}
3663 3664 3665 3666 3667 3668 3669
	num_allocated = lpfc_new_scsi_buf(vport, num_to_alloc);
	if (num_to_alloc != num_allocated) {
			lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
				 "0708 Allocation request of %d "
				 "command buffers did not succeed.  "
				 "Allocated %d buffers.\n",
				 num_to_alloc, num_allocated);
已提交
3670
	}
3671 3672
	if (num_allocated > 0)
		phba->total_scsi_bufs += num_allocated;
已提交
3673 3674 3675
	return 0;
}

3676
/**
3677
 * lpfc_slave_configure - scsi_host_template slave_configure entry point
3678 3679 3680 3681 3682 3683 3684 3685 3686
 * @sdev: Pointer to scsi_device.
 *
 * This routine configures following items
 *   - Tag command queuing support for @sdev if supported.
 *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
 *
 * Return codes:
 *   0 - Success
 **/
已提交
3687 3688 3689
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
J
James Smart 已提交
3690 3691
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
已提交
3692 3693

	if (sdev->tagged_supported)
3694
		scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
3695
	else
3696
		scsi_deactivate_tcq(sdev, vport->cfg_lun_queue_depth);
已提交
3697

3698
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
3699 3700
		lpfc_sli_handle_fast_ring_event(phba,
			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
3701 3702 3703 3704
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
3705 3706 3707
	return 0;
}

3708
/**
3709
 * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
3710 3711 3712 3713
 * @sdev: Pointer to scsi_device.
 *
 * This routine sets @sdev hostatdata filed to null.
 **/
已提交
3714 3715 3716
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
3717 3718 3719
	struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
	struct lpfc_hba   *phba = vport->phba;
	atomic_dec(&phba->sdev_cnt);
已提交
3720 3721 3722 3723
	sdev->hostdata = NULL;
	return;
}

3724

已提交
3725 3726 3727 3728 3729 3730
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,
3731 3732
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
3733
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
已提交
3734 3735 3736
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
3737
	.scan_finished		= lpfc_scan_finished,
已提交
3738
	.this_id		= -1,
3739
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
已提交
3740 3741
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
J
James Smart 已提交
3742
	.shost_attrs		= lpfc_hba_attrs,
3743
	.max_sectors		= 0xFFFF,
3744
	.vendor_id		= LPFC_NL_VENDOR_ID,
3745
	.change_queue_depth	= lpfc_change_queue_depth,
已提交
3746
};
3747 3748 3749 3750 3751 3752 3753

struct scsi_host_template lpfc_vport_template = {
	.module			= THIS_MODULE,
	.name			= LPFC_DRIVER_NAME,
	.info			= lpfc_info,
	.queuecommand		= lpfc_queuecommand,
	.eh_abort_handler	= lpfc_abort_handler,
3754 3755
	.eh_device_reset_handler = lpfc_device_reset_handler,
	.eh_target_reset_handler = lpfc_target_reset_handler,
3756 3757 3758 3759 3760 3761
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
	.slave_alloc		= lpfc_slave_alloc,
	.slave_configure	= lpfc_slave_configure,
	.slave_destroy		= lpfc_slave_destroy,
	.scan_finished		= lpfc_scan_finished,
	.this_id		= -1,
3762
	.sg_tablesize		= LPFC_DEFAULT_SG_SEG_CNT,
3763 3764 3765 3766
	.cmd_per_lun		= LPFC_CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING,
	.shost_attrs		= lpfc_vport_attrs,
	.max_sectors		= 0xFFFF,
3767
	.change_queue_depth	= lpfc_change_queue_depth,
3768
};