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[SCSI] pmcraid: remove duplicate struct member
[mirror_ubuntu-artful-kernel.git] / drivers / scsi / pmcraid.c
CommitLineData
89a36810
AR		 1/*
2 * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
3 *
729c8456
AR		 4 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
5 * PMC-Sierra Inc
89a36810
AR		 6 *
7 * Copyright (C) 2008, 2009 PMC Sierra Inc
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
22 * USA
23 *
24 */
25#include <linux/fs.h>
26#include <linux/init.h>
27#include <linux/types.h>
28#include <linux/errno.h>
29#include <linux/kernel.h>
30#include <linux/ioport.h>
31#include <linux/delay.h>
32#include <linux/pci.h>
33#include <linux/wait.h>
34#include <linux/spinlock.h>
35#include <linux/sched.h>
36#include <linux/interrupt.h>
37#include <linux/blkdev.h>
38#include <linux/firmware.h>
39#include <linux/module.h>
40#include <linux/moduleparam.h>
41#include <linux/hdreg.h>
42#include <linux/version.h>
43#include <linux/io.h>
5a0e3ad6 44#include <linux/slab.h>
89a36810
AR		 45#include <asm/irq.h>
46#include <asm/processor.h>
47#include <linux/libata.h>
48#include <linux/mutex.h>
49#include <scsi/scsi.h>
50#include <scsi/scsi_host.h>
34876402 51#include <scsi/scsi_device.h>
89a36810
AR		 52#include <scsi/scsi_tcq.h>
53#include <scsi/scsi_eh.h>
54#include <scsi/scsi_cmnd.h>
55#include <scsi/scsicam.h>
56
57#include "pmcraid.h"
58
59/*
60 * Module configuration parameters
61 */
62static unsigned int pmcraid_debug_log;
63static unsigned int pmcraid_disable_aen;
64static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
65
66/*
67 * Data structures to support multiple adapters by the LLD.
68 * pmcraid_adapter_count - count of configured adapters
69 */
70static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
71
72/*
73 * Supporting user-level control interface through IOCTL commands.
74 * pmcraid_major - major number to use
75 * pmcraid_minor - minor number(s) to use
76 */
77static unsigned int pmcraid_major;
78static struct class *pmcraid_class;
79DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
80
81/*
82 * Module parameters
83 */
729c8456 84MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
89a36810
AR		 85MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(PMCRAID_DRIVER_VERSION);
88
89module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
90MODULE_PARM_DESC(log_level,
91 "Enables firmware error code logging, default :1 high-severity"
92 " errors, 2: all errors including high-severity errors,"
93 " 0: disables logging");
94
95module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
96MODULE_PARM_DESC(debug,
97 "Enable driver verbose message logging. Set 1 to enable."
98 "(default: 0)");
99
100module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
101MODULE_PARM_DESC(disable_aen,
102 "Disable driver aen notifications to apps. Set 1 to disable."
103 "(default: 0)");
104
105/* chip specific constants for PMC MaxRAID controllers (same for
106 * 0x5220 and 0x8010
107 */
108static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
109 {
110 .ioastatus = 0x0,
111 .ioarrin = 0x00040,
112 .mailbox = 0x7FC30,
113 .global_intr_mask = 0x00034,
114 .ioa_host_intr = 0x0009C,
115 .ioa_host_intr_clr = 0x000A0,
c20c4267 116 .ioa_host_msix_intr = 0x7FC40,
89a36810
AR		 117 .ioa_host_mask = 0x7FC28,
118 .ioa_host_mask_clr = 0x7FC28,
119 .host_ioa_intr = 0x00020,
120 .host_ioa_intr_clr = 0x00020,
121 .transop_timeout = 300
122 }
123};
124
125/*
126 * PCI device ids supported by pmcraid driver
127 */
128static struct pci_device_id pmcraid_pci_table[] __devinitdata = {
129 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
130 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
131 },
132 {}
133};
134
135MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
136
137
138
139/**
140 * pmcraid_slave_alloc - Prepare for commands to a device
141 * @scsi_dev: scsi device struct
142 *
143 * This function is called by mid-layer prior to sending any command to the new
144 * device. Stores resource entry details of the device in scsi_device struct.
145 * Queuecommand uses the resource handle and other details to fill up IOARCB
146 * while sending commands to the device.
147 *
148 * Return value:
149 * 0 on success / -ENXIO if device does not exist
150 */
151static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
152{
153 struct pmcraid_resource_entry *temp, *res = NULL;
154 struct pmcraid_instance *pinstance;
155 u8 target, bus, lun;
156 unsigned long lock_flags;
157 int rc = -ENXIO;
c20c4267
AR		 158 u16 fw_version;
159
89a36810
AR		 160 pinstance = shost_priv(scsi_dev->host);
161
c20c4267
AR		 162 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
163
89a36810
AR		 164 /* Driver exposes VSET and GSCSI resources only; all other device types
165 * are not exposed. Resource list is synchronized using resource lock
166 * so any traversal or modifications to the list should be done inside
167 * this lock
168 */
169 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
170 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
171
729c8456 172 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
89a36810 173 if (RES_IS_VSET(temp->cfg_entry)) {
c20c4267
AR		 174 if (fw_version <= PMCRAID_FW_VERSION_1)
175 target = temp->cfg_entry.unique_flags1;
176 else
177 target = temp->cfg_entry.array_id & 0xFF;
178
729c8456 179 if (target > PMCRAID_MAX_VSET_TARGETS)
89a36810
AR		 180 continue;
181 bus = PMCRAID_VSET_BUS_ID;
182 lun = 0;
183 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
184 target = RES_TARGET(temp->cfg_entry.resource_address);
185 bus = PMCRAID_PHYS_BUS_ID;
186 lun = RES_LUN(temp->cfg_entry.resource_address);
187 } else {
188 continue;
189 }
190
191 if (bus == scsi_dev->channel &&
192 target == scsi_dev->id &&
193 lun == scsi_dev->lun) {
194 res = temp;
195 break;
196 }
197 }
198
199 if (res) {
200 res->scsi_dev = scsi_dev;
201 scsi_dev->hostdata = res;
202 res->change_detected = 0;
203 atomic_set(&res->read_failures, 0);
204 atomic_set(&res->write_failures, 0);
205 rc = 0;
206 }
207 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
208 return rc;
209}
210
211/**
212 * pmcraid_slave_configure - Configures a SCSI device
213 * @scsi_dev: scsi device struct
214 *
215 * This fucntion is executed by SCSI mid layer just after a device is first
216 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
217 * timeout value (default 30s) will be over-written to a higher value (60s)
218 * and max_sectors value will be over-written to 512. It also sets queue depth
219 * to host->cmd_per_lun value
220 *
221 * Return value:
222 * 0 on success
223 */
224static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
225{
226 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
227
228 if (!res)
229 return 0;
230
231 /* LLD exposes VSETs and Enclosure devices only */
232 if (RES_IS_GSCSI(res->cfg_entry) &&
233 scsi_dev->type != TYPE_ENCLOSURE)
234 return -ENXIO;
235
236 pmcraid_info("configuring %x:%x:%x:%x\n",
237 scsi_dev->host->unique_id,
238 scsi_dev->channel,
239 scsi_dev->id,
240 scsi_dev->lun);
241
242 if (RES_IS_GSCSI(res->cfg_entry)) {
243 scsi_dev->allow_restart = 1;
244 } else if (RES_IS_VSET(res->cfg_entry)) {
245 scsi_dev->allow_restart = 1;
246 blk_queue_rq_timeout(scsi_dev->request_queue,
247 PMCRAID_VSET_IO_TIMEOUT);
086fa5ff 248 blk_queue_max_hw_sectors(scsi_dev->request_queue,
89a36810
AR		 249 PMCRAID_VSET_MAX_SECTORS);
250 }
251
252 if (scsi_dev->tagged_supported &&
253 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
254 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
255 scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
256 scsi_dev->host->cmd_per_lun);
257 } else {
258 scsi_adjust_queue_depth(scsi_dev, 0,
259 scsi_dev->host->cmd_per_lun);
260 }
261
262 return 0;
263}
264
265/**
266 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
267 *
268 * @scsi_dev: scsi device struct
269 *
270 * This is called by mid-layer before removing a device. Pointer assignments
271 * done in pmcraid_slave_alloc will be reset to NULL here.
272 *
273 * Return value
274 * none
275 */
276static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
277{
278 struct pmcraid_resource_entry *res;
279
280 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
281
282 if (res)
283 res->scsi_dev = NULL;
284
285 scsi_dev->hostdata = NULL;
286}
287
288/**
289 * pmcraid_change_queue_depth - Change the device's queue depth
290 * @scsi_dev: scsi device struct
291 * @depth: depth to set
e881a172 292 * @reason: calling context
89a36810
AR		 293 *
294 * Return value
c20c4267 295 * actual depth set
89a36810 296 */
e881a172
MC		 297static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
298 int reason)
89a36810 299{
e881a172
MC		 300 if (reason != SCSI_QDEPTH_DEFAULT)
301 return -EOPNOTSUPP;
302
89a36810
AR		 303 if (depth > PMCRAID_MAX_CMD_PER_LUN)
304 depth = PMCRAID_MAX_CMD_PER_LUN;
305
306 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
307
308 return scsi_dev->queue_depth;
309}
310
311/**
312 * pmcraid_change_queue_type - Change the device's queue type
313 * @scsi_dev: scsi device struct
314 * @tag: type of tags to use
315 *
316 * Return value:
c20c4267 317 * actual queue type set
89a36810
AR		 318 */
319static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
320{
321 struct pmcraid_resource_entry *res;
322
323 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
324
325 if ((res) && scsi_dev->tagged_supported &&
326 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
327 scsi_set_tag_type(scsi_dev, tag);
328
329 if (tag)
330 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
331 else
332 scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
333 } else
334 tag = 0;
335
336 return tag;
337}
338
339
340/**
341 * pmcraid_init_cmdblk - initializes a command block
342 *
343 * @cmd: pointer to struct pmcraid_cmd to be initialized
344 * @index: if >=0 first time initialization; otherwise reinitialization
345 *
346 * Return Value
347 * None
348 */
349void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
350{
351 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
352 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
353
354 if (index >= 0) {
355 /* first time initialization (called from probe) */
356 u32 ioasa_offset =
357 offsetof(struct pmcraid_control_block, ioasa);
358
359 cmd->index = index;
360 ioarcb->response_handle = cpu_to_le32(index << 2);
361 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
362 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
363 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
364 } else {
365 /* re-initialization of various lengths, called once command is
366 * processed by IOA
367 */
368 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
c20c4267 369 ioarcb->hrrq_id = 0;
89a36810
AR		 370 ioarcb->request_flags0 = 0;
371 ioarcb->request_flags1 = 0;
372 ioarcb->cmd_timeout = 0;
373 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
374 ioarcb->ioadl_bus_addr = 0;
375 ioarcb->ioadl_length = 0;
376 ioarcb->data_transfer_length = 0;
377 ioarcb->add_cmd_param_length = 0;
378 ioarcb->add_cmd_param_offset = 0;
379 cmd->ioa_cb->ioasa.ioasc = 0;
380 cmd->ioa_cb->ioasa.residual_data_length = 0;
c20c4267 381 cmd->time_left = 0;
89a36810
AR		 382 }
383
384 cmd->cmd_done = NULL;
385 cmd->scsi_cmd = NULL;
386 cmd->release = 0;
387 cmd->completion_req = 0;
c20c4267
AR		 388 cmd->sense_buffer = 0;
389 cmd->sense_buffer_dma = 0;
89a36810
AR		 390 cmd->dma_handle = 0;
391 init_timer(&cmd->timer);
392}
393
394/**
395 * pmcraid_reinit_cmdblk - reinitialize a command block
396 *
397 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
398 *
399 * Return Value
400 * None
401 */
402static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
403{
404 pmcraid_init_cmdblk(cmd, -1);
405}
406
407/**
408 * pmcraid_get_free_cmd - get a free cmd block from command block pool
409 * @pinstance: adapter instance structure
410 *
411 * Return Value:
412 * returns pointer to cmd block or NULL if no blocks are available
413 */
414static struct pmcraid_cmd *pmcraid_get_free_cmd(
415 struct pmcraid_instance *pinstance
416)
417{
418 struct pmcraid_cmd *cmd = NULL;
419 unsigned long lock_flags;
420
421 /* free cmd block list is protected by free_pool_lock */
422 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
423
424 if (!list_empty(&pinstance->free_cmd_pool)) {
425 cmd = list_entry(pinstance->free_cmd_pool.next,
426 struct pmcraid_cmd, free_list);
427 list_del(&cmd->free_list);
428 }
429 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
430
431 /* Initialize the command block before giving it the caller */
432 if (cmd != NULL)
433 pmcraid_reinit_cmdblk(cmd);
434 return cmd;
435}
436
437/**
438 * pmcraid_return_cmd - return a completed command block back into free pool
439 * @cmd: pointer to the command block
440 *
441 * Return Value:
442 * nothing
443 */
444void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
445{
446 struct pmcraid_instance *pinstance = cmd->drv_inst;
447 unsigned long lock_flags;
448
449 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
450 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
451 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
452}
453
454/**
455 * pmcraid_read_interrupts - reads IOA interrupts
456 *
457 * @pinstance: pointer to adapter instance structure
458 *
459 * Return value
460 * interrupts read from IOA
461 */
462static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
463{
c20c4267
AR		 464 return (pinstance->interrupt_mode) ?
465 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
466 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
89a36810
AR		 467}
468
469/**
470 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
471 *
472 * @pinstance: pointer to per adapter instance structure
473 * @intrs: interrupts to disable
474 *
475 * Return Value
476 * None
477 */
478static void pmcraid_disable_interrupts(
479 struct pmcraid_instance *pinstance,
480 u32 intrs
481)
482{
483 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
484 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
485
89a36810 486 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
c20c4267
AR		 487 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
488 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
489
490 if (!pinstance->interrupt_mode) {
491 iowrite32(intrs,
492 pinstance->int_regs.ioa_host_interrupt_mask_reg);
493 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
494 }
89a36810
AR		 495}
496
497/**
498 * pmcraid_enable_interrupts - Enables specified interrupts
499 *
500 * @pinstance: pointer to per adapter instance structure
501 * @intr: interrupts to enable
502 *
503 * Return Value
504 * None
505 */
506static void pmcraid_enable_interrupts(
507 struct pmcraid_instance *pinstance,
508 u32 intrs
509)
510{
511 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
512 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
513
514 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
c20c4267
AR		 515
516 if (!pinstance->interrupt_mode) {
517 iowrite32(~intrs,
518 pinstance->int_regs.ioa_host_interrupt_mask_reg);
519 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
520 }
89a36810
AR		 521
522 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
523 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
524 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
525}
526
c20c4267
AR		 527/**
528 * pmcraid_clr_trans_op - clear trans to op interrupt
529 *
530 * @pinstance: pointer to per adapter instance structure
531 *
532 * Return Value
533 * None
534 */
535static void pmcraid_clr_trans_op(
536 struct pmcraid_instance *pinstance
537)
538{
539 unsigned long lock_flags;
540
541 if (!pinstance->interrupt_mode) {
542 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
543 pinstance->int_regs.ioa_host_interrupt_mask_reg);
544 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
545 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
546 pinstance->int_regs.ioa_host_interrupt_clr_reg);
547 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
548 }
549
550 if (pinstance->reset_cmd != NULL) {
551 del_timer(&pinstance->reset_cmd->timer);
552 spin_lock_irqsave(
553 pinstance->host->host_lock, lock_flags);
554 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
555 spin_unlock_irqrestore(
556 pinstance->host->host_lock, lock_flags);
557 }
558}
559
89a36810
AR		 560/**
561 * pmcraid_reset_type - Determine the required reset type
562 * @pinstance: pointer to adapter instance structure
563 *
564 * IOA requires hard reset if any of the following conditions is true.
565 * 1. If HRRQ valid interrupt is not masked
566 * 2. IOA reset alert doorbell is set
567 * 3. If there are any error interrupts
568 */
569static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
570{
571 u32 mask;
572 u32 intrs;
573 u32 alerts;
574
575 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
576 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
577 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
578
579 if ((mask & INTRS_HRRQ_VALID) == 0 ||
580 (alerts & DOORBELL_IOA_RESET_ALERT) ||
581 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
582 pmcraid_info("IOA requires hard reset\n");
583 pinstance->ioa_hard_reset = 1;
584 }
585
586 /* If unit check is active, trigger the dump */
587 if (intrs & INTRS_IOA_UNIT_CHECK)
588 pinstance->ioa_unit_check = 1;
589}
590
591/**
592 * pmcraid_bist_done - completion function for PCI BIST
593 * @cmd: pointer to reset command
594 * Return Value
c20c4267 595 * none
89a36810
AR		 596 */
597
598static void pmcraid_ioa_reset(struct pmcraid_cmd *);
599
600static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
601{
602 struct pmcraid_instance *pinstance = cmd->drv_inst;
603 unsigned long lock_flags;
604 int rc;
605 u16 pci_reg;
606
607 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
608
609 /* If PCI config space can't be accessed wait for another two secs */
610 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
c20c4267 611 cmd->time_left > 0) {
89a36810 612 pmcraid_info("BIST not complete, waiting another 2 secs\n");
c20c4267
AR		 613 cmd->timer.expires = jiffies + cmd->time_left;
614 cmd->time_left = 0;
89a36810
AR		 615 cmd->timer.data = (unsigned long)cmd;
616 cmd->timer.function =
617 (void (*)(unsigned long))pmcraid_bist_done;
618 add_timer(&cmd->timer);
619 } else {
c20c4267 620 cmd->time_left = 0;
89a36810
AR		 621 pmcraid_info("BIST is complete, proceeding with reset\n");
622 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
623 pmcraid_ioa_reset(cmd);
624 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
625 }
626}
627
628/**
629 * pmcraid_start_bist - starts BIST
630 * @cmd: pointer to reset cmd
631 * Return Value
632 * none
633 */
634static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
635{
636 struct pmcraid_instance *pinstance = cmd->drv_inst;
637 u32 doorbells, intrs;
638
639 /* proceed with bist and wait for 2 seconds */
640 iowrite32(DOORBELL_IOA_START_BIST,
641 pinstance->int_regs.host_ioa_interrupt_reg);
642 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
643 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
c20c4267 644 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
89a36810
AR		 645 doorbells, intrs);
646
c20c4267 647 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
89a36810
AR		 648 cmd->timer.data = (unsigned long)cmd;
649 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
650 cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
651 add_timer(&cmd->timer);
652}
653
654/**
655 * pmcraid_reset_alert_done - completion routine for reset_alert
656 * @cmd: pointer to command block used in reset sequence
657 * Return value
658 * None
659 */
660static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
661{
662 struct pmcraid_instance *pinstance = cmd->drv_inst;
663 u32 status = ioread32(pinstance->ioa_status);
664 unsigned long lock_flags;
665
666 /* if the critical operation in progress bit is set or the wait times
667 * out, invoke reset engine to proceed with hard reset. If there is
668 * some more time to wait, restart the timer
669 */
670 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
c20c4267 671 cmd->time_left <= 0) {
89a36810
AR		 672 pmcraid_info("critical op is reset proceeding with reset\n");
673 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
674 pmcraid_ioa_reset(cmd);
675 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
676 } else {
677 pmcraid_info("critical op is not yet reset waiting again\n");
678 /* restart timer if some more time is available to wait */
c20c4267 679 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
89a36810
AR		 680 cmd->timer.data = (unsigned long)cmd;
681 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
682 cmd->timer.function =
683 (void (*)(unsigned long))pmcraid_reset_alert_done;
684 add_timer(&cmd->timer);
685 }
686}
687
688/**
689 * pmcraid_reset_alert - alerts IOA for a possible reset
690 * @cmd : command block to be used for reset sequence.
691 *
692 * Return Value
693 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
694 * successfully written to IOA. Returns non-zero in case pci_config_space
695 * is not accessible
696 */
c20c4267 697static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
89a36810
AR		 698static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
699{
700 struct pmcraid_instance *pinstance = cmd->drv_inst;
701 u32 doorbells;
702 int rc;
703 u16 pci_reg;
704
705 /* If we are able to access IOA PCI config space, alert IOA that we are
706 * going to reset it soon. This enables IOA to preserv persistent error
707 * data if any. In case memory space is not accessible, proceed with
708 * BIST or slot_reset
709 */
710 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
711 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
712
713 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
714 * reset IOA doesn't generate any interrupts when CRITICAL
715 * OPERATION bit is reset. A timer is started to wait for this
716 * bit to be reset.
717 */
c20c4267 718 cmd->time_left = PMCRAID_RESET_TIMEOUT;
89a36810
AR		 719 cmd->timer.data = (unsigned long)cmd;
720 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
721 cmd->timer.function =
722 (void (*)(unsigned long))pmcraid_reset_alert_done;
723 add_timer(&cmd->timer);
724
725 iowrite32(DOORBELL_IOA_RESET_ALERT,
726 pinstance->int_regs.host_ioa_interrupt_reg);
727 doorbells =
728 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
729 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
730 } else {
731 pmcraid_info("PCI config is not accessible starting BIST\n");
732 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
733 pmcraid_start_bist(cmd);
734 }
735}
736
737/**
738 * pmcraid_timeout_handler - Timeout handler for internally generated ops
739 *
740 * @cmd : pointer to command structure, that got timedout
741 *
742 * This function blocks host requests and initiates an adapter reset.
743 *
744 * Return value:
745 * None
746 */
747static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
748{
749 struct pmcraid_instance *pinstance = cmd->drv_inst;
750 unsigned long lock_flags;
751
34876402 752 dev_info(&pinstance->pdev->dev,
c20c4267
AR		 753 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
754 cmd->ioa_cb->ioarcb.cdb[0]);
89a36810
AR		 755
756 /* Command timeouts result in hard reset sequence. The command that got
757 * timed out may be the one used as part of reset sequence. In this
758 * case restart reset sequence using the same command block even if
759 * reset is in progress. Otherwise fail this command and get a free
760 * command block to restart the reset sequence.
761 */
762 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
763 if (!pinstance->ioa_reset_in_progress) {
764 pinstance->ioa_reset_attempts = 0;
765 cmd = pmcraid_get_free_cmd(pinstance);
766
767 /* If we are out of command blocks, just return here itself.
768 * Some other command's timeout handler can do the reset job
769 */
770 if (cmd == NULL) {
771 spin_unlock_irqrestore(pinstance->host->host_lock,
772 lock_flags);
773 pmcraid_err("no free cmnd block for timeout handler\n");
774 return;
775 }
776
777 pinstance->reset_cmd = cmd;
778 pinstance->ioa_reset_in_progress = 1;
779 } else {
780 pmcraid_info("reset is already in progress\n");
781
782 if (pinstance->reset_cmd != cmd) {
783 /* This command should have been given to IOA, this
784 * command will be completed by fail_outstanding_cmds
785 * anyway
786 */
787 pmcraid_err("cmd is pending but reset in progress\n");
788 }
789
790 /* If this command was being used as part of the reset
791 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
792 * causes fail_outstanding_commands not to return the command
793 * block back to free pool
794 */
795 if (cmd == pinstance->reset_cmd)
796 cmd->cmd_done = pmcraid_ioa_reset;
89a36810
AR		 797 }
798
c20c4267
AR		 799 /* Notify apps of important IOA bringup/bringdown sequences */
800 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
801 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
802 pmcraid_notify_ioastate(pinstance,
803 PMC_DEVICE_EVENT_RESET_START);
804
89a36810
AR		 805 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
806 scsi_block_requests(pinstance->host);
807 pmcraid_reset_alert(cmd);
808 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
809}
810
811/**
812 * pmcraid_internal_done - completion routine for internally generated cmds
813 *
814 * @cmd: command that got response from IOA
815 *
816 * Return Value:
817 * none
818 */
819static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
820{
821 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
822 cmd->ioa_cb->ioarcb.cdb[0],
823 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
824
825 /* Some of the internal commands are sent with callers blocking for the
826 * response. Same will be indicated as part of cmd->completion_req
827 * field. Response path needs to wake up any waiters waiting for cmd
828 * completion if this flag is set.
829 */
830 if (cmd->completion_req) {
831 cmd->completion_req = 0;
832 complete(&cmd->wait_for_completion);
833 }
834
835 /* most of the internal commands are completed by caller itself, so
836 * no need to return the command block back to free pool until we are
837 * required to do so (e.g once done with initialization).
838 */
839 if (cmd->release) {
840 cmd->release = 0;
841 pmcraid_return_cmd(cmd);
842 }
843}
844
845/**
846 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
847 *
848 * @cmd: command that got response from IOA
849 *
850 * This routine is called after driver re-reads configuration table due to a
851 * lost CCN. It returns the command block back to free pool and schedules
852 * worker thread to add/delete devices into the system.
853 *
854 * Return Value:
855 * none
856 */
857static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
858{
859 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
860 cmd->ioa_cb->ioarcb.cdb[0],
861 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
862
863 if (cmd->release) {
864 cmd->release = 0;
865 pmcraid_return_cmd(cmd);
866 }
867 pmcraid_info("scheduling worker for config table reinitialization\n");
868 schedule_work(&cmd->drv_inst->worker_q);
869}
870
871/**
872 * pmcraid_erp_done - Process completion of SCSI error response from device
873 * @cmd: pmcraid_command
874 *
875 * This function copies the sense buffer into the scsi_cmd struct and completes
876 * scsi_cmd by calling scsi_done function.
877 *
878 * Return value:
879 * none
880 */
881static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
882{
883 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
884 struct pmcraid_instance *pinstance = cmd->drv_inst;
885 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
886
887 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
888 scsi_cmd->result |= (DID_ERROR << 16);
34876402
AR		 889 scmd_printk(KERN_INFO, scsi_cmd,
890 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
891 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
89a36810
AR		 892 }
893
894 /* if we had allocated sense buffers for request sense, copy the sense
895 * release the buffers
896 */
897 if (cmd->sense_buffer != NULL) {
898 memcpy(scsi_cmd->sense_buffer,
899 cmd->sense_buffer,
900 SCSI_SENSE_BUFFERSIZE);
901 pci_free_consistent(pinstance->pdev,
902 SCSI_SENSE_BUFFERSIZE,
903 cmd->sense_buffer, cmd->sense_buffer_dma);
904 cmd->sense_buffer = NULL;
905 cmd->sense_buffer_dma = 0;
906 }
907
908 scsi_dma_unmap(scsi_cmd);
909 pmcraid_return_cmd(cmd);
910 scsi_cmd->scsi_done(scsi_cmd);
911}
912
913/**
914 * pmcraid_fire_command - sends an IOA command to adapter
915 *
916 * This function adds the given block into pending command list
917 * and returns without waiting
918 *
919 * @cmd : command to be sent to the device
920 *
921 * Return Value
922 * None
923 */
924static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
925{
926 struct pmcraid_instance *pinstance = cmd->drv_inst;
927 unsigned long lock_flags;
928
929 /* Add this command block to pending cmd pool. We do this prior to
930 * writting IOARCB to ioarrin because IOA might complete the command
931 * by the time we are about to add it to the list. Response handler
c20c4267 932 * (isr/tasklet) looks for cmd block in the pending pending list.
89a36810
AR		 933 */
934 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
935 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
936 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
937 atomic_inc(&pinstance->outstanding_cmds);
938
939 /* driver writes lower 32-bit value of IOARCB address only */
940 mb();
941 iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
942 pinstance->ioarrin);
943}
944
945/**
946 * pmcraid_send_cmd - fires a command to IOA
947 *
948 * This function also sets up timeout function, and command completion
949 * function
950 *
951 * @cmd: pointer to the command block to be fired to IOA
952 * @cmd_done: command completion function, called once IOA responds
953 * @timeout: timeout to wait for this command completion
954 * @timeout_func: timeout handler
955 *
956 * Return value
957 * none
958 */
959static void pmcraid_send_cmd(
960 struct pmcraid_cmd *cmd,
961 void (*cmd_done) (struct pmcraid_cmd *),
962 unsigned long timeout,
963 void (*timeout_func) (struct pmcraid_cmd *)
964)
965{
966 /* initialize done function */
967 cmd->cmd_done = cmd_done;
968
969 if (timeout_func) {
970 /* setup timeout handler */
971 cmd->timer.data = (unsigned long)cmd;
972 cmd->timer.expires = jiffies + timeout;
973 cmd->timer.function = (void (*)(unsigned long))timeout_func;
974 add_timer(&cmd->timer);
975 }
976
977 /* fire the command to IOA */
978 _pmcraid_fire_command(cmd);
979}
980
c20c4267
AR		 981/**
982 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
983 * @cmd: pointer to the command block used for sending IOA shutdown command
984 *
985 * Return value
986 * None
987 */
988static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
989{
990 struct pmcraid_instance *pinstance = cmd->drv_inst;
991 unsigned long lock_flags;
992
993 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
994 pmcraid_ioa_reset(cmd);
995 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
996}
997
89a36810
AR		 998/**
999 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
1000 *
1001 * @cmd: pointer to the command block used as part of reset sequence
1002 *
1003 * Return Value
1004 * None
1005 */
1006static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
1007{
1008 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
1009 cmd->ioa_cb->ioarcb.cdb[0],
1010 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1011
1012 /* Note that commands sent during reset require next command to be sent
1013 * to IOA. Hence reinit the done function as well as timeout function
1014 */
1015 pmcraid_reinit_cmdblk(cmd);
1016 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
1017 cmd->ioa_cb->ioarcb.resource_handle =
1018 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1019 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
1020 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
1021
1022 /* fire shutdown command to hardware. */
1023 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
1024 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
1025
c20c4267
AR		 1026 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
1027
1028 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
89a36810
AR		 1029 PMCRAID_SHUTDOWN_TIMEOUT,
1030 pmcraid_timeout_handler);
1031}
1032
1033/**
c20c4267
AR		 1034 * pmcraid_get_fwversion_done - completion function for get_fwversion
1035 *
1036 * @cmd: pointer to command block used to send INQUIRY command
89a36810
AR		 1037 *
1038 * Return Value
c20c4267 1039 * none
89a36810 1040 */
89a36810
AR		 1041static void pmcraid_querycfg(struct pmcraid_cmd *);
1042
c20c4267
AR		 1043static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
1044{
1045 struct pmcraid_instance *pinstance = cmd->drv_inst;
1046 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1047 unsigned long lock_flags;
1048
1049 /* configuration table entry size depends on firmware version. If fw
1050 * version is not known, it is not possible to interpret IOA config
1051 * table
1052 */
1053 if (ioasc) {
1054 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
1055 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1056 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1057 pmcraid_reset_alert(cmd);
1058 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1059 } else {
1060 pmcraid_querycfg(cmd);
1061 }
1062}
1063
1064/**
1065 * pmcraid_get_fwversion - reads firmware version information
1066 *
1067 * @cmd: pointer to command block used to send INQUIRY command
1068 *
1069 * Return Value
1070 * none
1071 */
1072static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1073{
1074 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1075 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
1076 struct pmcraid_instance *pinstance = cmd->drv_inst;
1077 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1078
1079 pmcraid_reinit_cmdblk(cmd);
1080 ioarcb->request_type = REQ_TYPE_SCSI;
1081 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1082 ioarcb->cdb[0] = INQUIRY;
1083 ioarcb->cdb[1] = 1;
1084 ioarcb->cdb[2] = 0xD0;
1085 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1086 ioarcb->cdb[4] = data_size & 0xFF;
1087
1088 /* Since entire inquiry data it can be part of IOARCB itself
1089 */
1090 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1091 offsetof(struct pmcraid_ioarcb,
1092 add_data.u.ioadl[0]));
1093 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1094 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
1095
1096 ioarcb->request_flags0 |= NO_LINK_DESCS;
1097 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1098 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1099 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1100 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1101 ioadl->data_len = cpu_to_le32(data_size);
1102
1103 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1104 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1105}
1106
1107/**
1108 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1109 * @cmd: pointer to command block to be used for identify hrrq
1110 *
1111 * Return Value
1112 * none
1113 */
89a36810
AR		 1114static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1115{
1116 struct pmcraid_instance *pinstance = cmd->drv_inst;
1117 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
c20c4267 1118 int index = cmd->hrrq_index;
89a36810
AR		 1119 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1120 u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
c20c4267 1121 void (*done_function)(struct pmcraid_cmd *);
89a36810
AR		 1122
1123 pmcraid_reinit_cmdblk(cmd);
c20c4267
AR		 1124 cmd->hrrq_index = index + 1;
1125
1126 if (cmd->hrrq_index < pinstance->num_hrrq) {
1127 done_function = pmcraid_identify_hrrq;
1128 } else {
1129 cmd->hrrq_index = 0;
1130 done_function = pmcraid_get_fwversion;
1131 }
89a36810
AR		 1132
1133 /* Initialize ioarcb */
1134 ioarcb->request_type = REQ_TYPE_IOACMD;
1135 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1136
1137 /* initialize the hrrq number where IOA will respond to this command */
1138 ioarcb->hrrq_id = index;
1139 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1140 ioarcb->cdb[1] = index;
1141
1142 /* IOA expects 64-bit pci address to be written in B.E format
1143 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1144 */
c20c4267
AR		 1145 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1146 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
89a36810
AR		 1147
1148 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1149 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1150
1151 /* Subsequent commands require HRRQ identification to be successful.
1152 * Note that this gets called even during reset from SCSI mid-layer
1153 * or tasklet
1154 */
c20c4267 1155 pmcraid_send_cmd(cmd, done_function,
89a36810
AR		 1156 PMCRAID_INTERNAL_TIMEOUT,
1157 pmcraid_timeout_handler);
1158}
1159
1160static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1161static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1162
1163/**
1164 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1165 *
1166 * @cmd: initialized command block pointer
1167 *
1168 * Return Value
1169 * none
1170 */
1171static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1172{
1173 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1174 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1175 else
1176 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1177
1178 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1179}
1180
1181/**
1182 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1183 *
1184 * @pinstance: pointer to adapter instance structure
1185 * @type: HCAM type
1186 *
1187 * Return Value
1188 * pointer to initialized pmcraid_cmd structure or NULL
1189 */
1190static struct pmcraid_cmd *pmcraid_init_hcam
1191(
1192 struct pmcraid_instance *pinstance,
1193 u8 type
1194)
1195{
1196 struct pmcraid_cmd *cmd;
1197 struct pmcraid_ioarcb *ioarcb;
1198 struct pmcraid_ioadl_desc *ioadl;
1199 struct pmcraid_hostrcb *hcam;
1200 void (*cmd_done) (struct pmcraid_cmd *);
1201 dma_addr_t dma;
1202 int rcb_size;
1203
1204 cmd = pmcraid_get_free_cmd(pinstance);
1205
1206 if (!cmd) {
1207 pmcraid_err("no free command blocks for hcam\n");
1208 return cmd;
1209 }
1210
1211 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
c20c4267 1212 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
89a36810
AR		 1213 cmd_done = pmcraid_process_ccn;
1214 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1215 hcam = &pinstance->ccn;
1216 } else {
1217 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1218 cmd_done = pmcraid_process_ldn;
1219 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1220 hcam = &pinstance->ldn;
1221 }
1222
1223 /* initialize command pointer used for HCAM registration */
1224 hcam->cmd = cmd;
1225
1226 ioarcb = &cmd->ioa_cb->ioarcb;
1227 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1228 offsetof(struct pmcraid_ioarcb,
1229 add_data.u.ioadl[0]));
1230 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1231 ioadl = ioarcb->add_data.u.ioadl;
1232
1233 /* Initialize ioarcb */
1234 ioarcb->request_type = REQ_TYPE_HCAM;
1235 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1236 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1237 ioarcb->cdb[1] = type;
1238 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1239 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1240
1241 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1242
88197966 1243 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
89a36810
AR		 1244 ioadl[0].data_len = cpu_to_le32(rcb_size);
1245 ioadl[0].address = cpu_to_le32(dma);
1246
1247 cmd->cmd_done = cmd_done;
1248 return cmd;
1249}
1250
1251/**
1252 * pmcraid_send_hcam - Send an HCAM to IOA
1253 * @pinstance: ioa config struct
1254 * @type: HCAM type
1255 *
1256 * This function will send a Host Controlled Async command to IOA.
1257 *
1258 * Return value:
c20c4267 1259 * none
89a36810
AR		 1260 */
1261static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1262{
1263 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1264 pmcraid_send_hcam_cmd(cmd);
1265}
1266
1267
1268/**
1269 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1270 *
1271 * @cmd: pointer to cmd that is used as cancelling command
1272 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1273 */
1274static void pmcraid_prepare_cancel_cmd(
1275 struct pmcraid_cmd *cmd,
1276 struct pmcraid_cmd *cmd_to_cancel
1277)
1278{
1279 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1280 __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
1281
1282 /* Get the resource handle to where the command to be aborted has been
1283 * sent.
1284 */
1285 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1286 ioarcb->request_type = REQ_TYPE_IOACMD;
1287 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1288 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1289
1290 /* IOARCB address of the command to be cancelled is given in
1291 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1292 * IOARCB address are not masked.
1293 */
1294 ioarcb_addr = cpu_to_be64(ioarcb_addr);
1295 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1296}
1297
1298/**
1299 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1300 *
1301 * @cmd: command to be used as cancelling command
1302 * @type: HCAM type
1303 * @cmd_done: op done function for the cancelling command
1304 */
1305static void pmcraid_cancel_hcam(
1306 struct pmcraid_cmd *cmd,
1307 u8 type,
1308 void (*cmd_done) (struct pmcraid_cmd *)
1309)
1310{
1311 struct pmcraid_instance *pinstance;
1312 struct pmcraid_hostrcb *hcam;
1313
1314 pinstance = cmd->drv_inst;
1315 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1316 &pinstance->ldn : &pinstance->ccn;
1317
1318 /* prepare for cancelling previous hcam command. If the HCAM is
1319 * currently not pending with IOA, we would have hcam->cmd as non-null
1320 */
1321 if (hcam->cmd == NULL)
1322 return;
1323
1324 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1325
1326 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1327 * schedule queuecommand while we are doing this
1328 */
1329 pmcraid_send_cmd(cmd, cmd_done,
1330 PMCRAID_INTERNAL_TIMEOUT,
1331 pmcraid_timeout_handler);
1332}
1333
1334/**
1335 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1336 *
1337 * @cmd: command block to be used for cancelling the HCAM
1338 */
1339static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1340{
1341 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1342 cmd->ioa_cb->ioarcb.cdb[0],
1343 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1344
1345 pmcraid_reinit_cmdblk(cmd);
1346
1347 pmcraid_cancel_hcam(cmd,
1348 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1349 pmcraid_ioa_shutdown);
1350}
1351
1352/**
1353 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1354 *
1355 * @cmd: command block to be used for cancelling the HCAM
1356 */
1357static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1358{
1359 pmcraid_cancel_hcam(cmd,
1360 PMCRAID_HCAM_CODE_LOG_DATA,
1361 pmcraid_cancel_ccn);
1362}
1363
1364/**
1365 * pmcraid_expose_resource - check if the resource can be exposed to OS
1366 *
c20c4267 1367 * @fw_version: firmware version code
89a36810
AR		 1368 * @cfgte: pointer to configuration table entry of the resource
1369 *
1370 * Return value:
c20c4267 1371 * true if resource can be added to midlayer, false(0) otherwise
89a36810 1372 */
c20c4267
AR		 1373static int pmcraid_expose_resource(u16 fw_version,
1374 struct pmcraid_config_table_entry *cfgte)
89a36810
AR		 1375{
1376 int retval = 0;
1377
c20c4267
AR		 1378 if (cfgte->resource_type == RES_TYPE_VSET) {
1379 if (fw_version <= PMCRAID_FW_VERSION_1)
1380 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1381 else
1382 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1383 (cfgte->unique_flags1 & 0x80) == 0);
1384
1385 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
89a36810
AR		 1386 retval = (RES_BUS(cfgte->resource_address) !=
1387 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1388 return retval;
1389}
1390
1391/* attributes supported by pmcraid_event_family */
1392enum {
1393 PMCRAID_AEN_ATTR_UNSPEC,
1394 PMCRAID_AEN_ATTR_EVENT,
1395 __PMCRAID_AEN_ATTR_MAX,
1396};
1397#define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1398
1399/* commands supported by pmcraid_event_family */
1400enum {
1401 PMCRAID_AEN_CMD_UNSPEC,
1402 PMCRAID_AEN_CMD_EVENT,
1403 __PMCRAID_AEN_CMD_MAX,
1404};
1405#define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1406
1407static struct genl_family pmcraid_event_family = {
1408 .id = GENL_ID_GENERATE,
1409 .name = "pmcraid",
1410 .version = 1,
1411 .maxattr = PMCRAID_AEN_ATTR_MAX
1412};
1413
1414/**
1415 * pmcraid_netlink_init - registers pmcraid_event_family
1416 *
1417 * Return value:
c20c4267
AR		 1418 * 0 if the pmcraid_event_family is successfully registered
1419 * with netlink generic, non-zero otherwise
89a36810
AR		 1420 */
1421static int pmcraid_netlink_init(void)
1422{
1423 int result;
1424
1425 result = genl_register_family(&pmcraid_event_family);
1426
1427 if (result)
1428 return result;
1429
1430 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1431 pmcraid_event_family.id);
1432
1433 return result;
1434}
1435
1436/**
1437 * pmcraid_netlink_release - unregisters pmcraid_event_family
1438 *
1439 * Return value:
c20c4267 1440 * none
89a36810
AR		 1441 */
1442static void pmcraid_netlink_release(void)
1443{
1444 genl_unregister_family(&pmcraid_event_family);
1445}
1446
1447/**
1448 * pmcraid_notify_aen - sends event msg to user space application
1449 * @pinstance: pointer to adapter instance structure
1450 * @type: HCAM type
1451 *
1452 * Return value:
1453 * 0 if success, error value in case of any failure.
1454 */
c20c4267
AR		 1455static int pmcraid_notify_aen(
1456 struct pmcraid_instance *pinstance,
1457 struct pmcraid_aen_msg *aen_msg,
1458 u32 data_size
1459)
89a36810
AR		 1460{
1461 struct sk_buff *skb;
89a36810 1462 void *msg_header;
c20c4267 1463 u32 total_size, nla_genl_hdr_total_size;
89a36810
AR		 1464 int result;
1465
89a36810
AR		 1466 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1467 MINOR(pinstance->cdev.dev));
1468 aen_msg->length = data_size;
c20c4267 1469
89a36810
AR		 1470 data_size += sizeof(*aen_msg);
1471
1472 total_size = nla_total_size(data_size);
c20c4267
AR		 1473 /* Add GENL_HDR to total_size */
1474 nla_genl_hdr_total_size =
1475 (total_size + (GENL_HDRLEN +
1476 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1477 + NLMSG_HDRLEN);
1478 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
89a36810
AR		 1479
1480
1481 if (!skb) {
1482 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1483 total_size);
1484 return -ENOMEM;
1485 }
1486
1487 /* add the genetlink message header */
1488 msg_header = genlmsg_put(skb, 0, 0,
1489 &pmcraid_event_family, 0,
1490 PMCRAID_AEN_CMD_EVENT);
1491 if (!msg_header) {
1492 pmcraid_err("failed to copy command details\n");
1493 nlmsg_free(skb);
1494 return -ENOMEM;
1495 }
1496
1497 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1498
1499 if (result) {
c20c4267 1500 pmcraid_err("failed to copy AEN attribute data\n");
89a36810
AR		 1501 nlmsg_free(skb);
1502 return -EINVAL;
1503 }
1504
1505 /* send genetlink multicast message to notify appplications */
1506 result = genlmsg_end(skb, msg_header);
1507
1508 if (result < 0) {
1509 pmcraid_err("genlmsg_end failed\n");
1510 nlmsg_free(skb);
1511 return result;
1512 }
1513
1514 result =
1515 genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
1516
1517 /* If there are no listeners, genlmsg_multicast may return non-zero
1518 * value.
1519 */
1520 if (result)
c20c4267 1521 pmcraid_info("error (%x) sending aen event message\n", result);
89a36810
AR		 1522 return result;
1523}
1524
c20c4267
AR		 1525/**
1526 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1527 * @pinstance: pointer adapter instance structure
1528 *
1529 * Return value:
1530 * 0 if success, error value in case of any failure
1531 */
1532static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1533{
1534 return pmcraid_notify_aen(pinstance,
1535 pinstance->ccn.msg,
1536 pinstance->ccn.hcam->data_len +
1537 sizeof(struct pmcraid_hcam_hdr));
1538}
1539
1540/**
1541 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1542 * @pinstance: pointer adapter instance structure
1543 *
1544 * Return value:
1545 * 0 if success, error value in case of any failure
1546 */
1547static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1548{
1549 return pmcraid_notify_aen(pinstance,
1550 pinstance->ldn.msg,
1551 pinstance->ldn.hcam->data_len +
1552 sizeof(struct pmcraid_hcam_hdr));
1553}
1554
1555/**
1556 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1557 * @pinstance: pointer adapter instance structure
1558 * @evt: controller state event to be sent
1559 *
1560 * Return value:
1561 * 0 if success, error value in case of any failure
1562 */
1563static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1564{
1565 pinstance->scn.ioa_state = evt;
1566 pmcraid_notify_aen(pinstance,
1567 &pinstance->scn.msg,
1568 sizeof(u32));
1569}
1570
89a36810
AR		 1571/**
1572 * pmcraid_handle_config_change - Handle a config change from the adapter
1573 * @pinstance: pointer to per adapter instance structure
1574 *
1575 * Return value:
1576 * none
1577 */
729c8456 1578
89a36810
AR		 1579static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1580{
1581 struct pmcraid_config_table_entry *cfg_entry;
1582 struct pmcraid_hcam_ccn *ccn_hcam;
1583 struct pmcraid_cmd *cmd;
1584 struct pmcraid_cmd *cfgcmd;
1585 struct pmcraid_resource_entry *res = NULL;
89a36810
AR		 1586 unsigned long lock_flags;
1587 unsigned long host_lock_flags;
729c8456
AR		 1588 u32 new_entry = 1;
1589 u32 hidden_entry = 0;
c20c4267 1590 u16 fw_version;
89a36810
AR		 1591 int rc;
1592
1593 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1594 cfg_entry = &ccn_hcam->cfg_entry;
c20c4267 1595 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
89a36810
AR		 1596
1597 pmcraid_info
1598 ("CCN(%x): %x type: %x lost: %x flags: %x res: %x:%x:%x:%x\n",
1599 pinstance->ccn.hcam->ilid,
1600 pinstance->ccn.hcam->op_code,
1601 pinstance->ccn.hcam->notification_type,
1602 pinstance->ccn.hcam->notification_lost,
1603 pinstance->ccn.hcam->flags,
1604 pinstance->host->unique_id,
1605 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1606 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1607 RES_BUS(cfg_entry->resource_address)),
c20c4267
AR		 1608 RES_IS_VSET(*cfg_entry) ?
1609 (fw_version <= PMCRAID_FW_VERSION_1 ?
1610 cfg_entry->unique_flags1 :
1611 cfg_entry->array_id & 0xFF) :
89a36810
AR		 1612 RES_TARGET(cfg_entry->resource_address),
1613 RES_LUN(cfg_entry->resource_address));
1614
1615
1616 /* If this HCAM indicates a lost notification, read the config table */
1617 if (pinstance->ccn.hcam->notification_lost) {
1618 cfgcmd = pmcraid_get_free_cmd(pinstance);
1619 if (cfgcmd) {
1620 pmcraid_info("lost CCN, reading config table\b");
1621 pinstance->reinit_cfg_table = 1;
1622 pmcraid_querycfg(cfgcmd);
1623 } else {
1624 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1625 }
1626 goto out_notify_apps;
1627 }
1628
1629 /* If this resource is not going to be added to mid-layer, just notify
729c8456
AR		 1630 * applications and return. If this notification is about hiding a VSET
1631 * resource, check if it was exposed already.
89a36810 1632 */
729c8456
AR		 1633 if (pinstance->ccn.hcam->notification_type ==
1634 NOTIFICATION_TYPE_ENTRY_CHANGED &&
c20c4267
AR		 1635 cfg_entry->resource_type == RES_TYPE_VSET) {
1636
1637 if (fw_version <= PMCRAID_FW_VERSION_1)
1638 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1639 else
1640 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1641
1642 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
89a36810 1643 goto out_notify_apps;
c20c4267 1644 }
89a36810
AR		 1645
1646 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1647 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1648 rc = memcmp(&res->cfg_entry.resource_address,
1649 &cfg_entry->resource_address,
1650 sizeof(cfg_entry->resource_address));
1651 if (!rc) {
1652 new_entry = 0;
1653 break;
1654 }
1655 }
1656
1657 if (new_entry) {
1658
729c8456
AR		 1659 if (hidden_entry) {
1660 spin_unlock_irqrestore(&pinstance->resource_lock,
1661 lock_flags);
1662 goto out_notify_apps;
1663 }
1664
89a36810
AR		 1665 /* If there are more number of resources than what driver can
1666 * manage, do not notify the applications about the CCN. Just
1667 * ignore this notifications and re-register the same HCAM
1668 */
1669 if (list_empty(&pinstance->free_res_q)) {
1670 spin_unlock_irqrestore(&pinstance->resource_lock,
1671 lock_flags);
1672 pmcraid_err("too many resources attached\n");
1673 spin_lock_irqsave(pinstance->host->host_lock,
1674 host_lock_flags);
1675 pmcraid_send_hcam(pinstance,
1676 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1677 spin_unlock_irqrestore(pinstance->host->host_lock,
1678 host_lock_flags);
1679 return;
1680 }
1681
1682 res = list_entry(pinstance->free_res_q.next,
1683 struct pmcraid_resource_entry, queue);
1684
1685 list_del(&res->queue);
1686 res->scsi_dev = NULL;
1687 res->reset_progress = 0;
1688 list_add_tail(&res->queue, &pinstance->used_res_q);
1689 }
1690
c20c4267 1691 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
89a36810
AR		 1692
1693 if (pinstance->ccn.hcam->notification_type ==
729c8456 1694 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
89a36810 1695 if (res->scsi_dev) {
c20c4267
AR		 1696 if (fw_version <= PMCRAID_FW_VERSION_1)
1697 res->cfg_entry.unique_flags1 &= 0x7F;
1698 else
1699 res->cfg_entry.array_id &= 0xFF;
89a36810
AR		 1700 res->change_detected = RES_CHANGE_DEL;
1701 res->cfg_entry.resource_handle =
1702 PMCRAID_INVALID_RES_HANDLE;
1703 schedule_work(&pinstance->worker_q);
1704 } else {
1705 /* This may be one of the non-exposed resources */
1706 list_move_tail(&res->queue, &pinstance->free_res_q);
1707 }
1708 } else if (!res->scsi_dev) {
1709 res->change_detected = RES_CHANGE_ADD;
1710 schedule_work(&pinstance->worker_q);
1711 }
1712 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1713
1714out_notify_apps:
1715
1716 /* Notify configuration changes to registered applications.*/
1717 if (!pmcraid_disable_aen)
c20c4267 1718 pmcraid_notify_ccn(pinstance);
89a36810
AR		 1719
1720 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1721 if (cmd)
1722 pmcraid_send_hcam_cmd(cmd);
1723}
1724
1725/**
1726 * pmcraid_get_error_info - return error string for an ioasc
1727 * @ioasc: ioasc code
1728 * Return Value
1729 * none
1730 */
1731static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1732{
1733 int i;
1734 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1735 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1736 return &pmcraid_ioasc_error_table[i];
1737 }
1738 return NULL;
1739}
1740
1741/**
1742 * pmcraid_ioasc_logger - log IOASC information based user-settings
1743 * @ioasc: ioasc code
1744 * @cmd: pointer to command that resulted in 'ioasc'
1745 */
1746void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1747{
1748 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1749
1750 if (error_info == NULL ||
1751 cmd->drv_inst->current_log_level < error_info->log_level)
1752 return;
1753
1754 /* log the error string */
c20c4267 1755 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
89a36810
AR		 1756 cmd->ioa_cb->ioarcb.cdb[0],
1757 cmd->ioa_cb->ioarcb.resource_handle,
1758 le32_to_cpu(ioasc), error_info->error_string);
1759}
1760
1761/**
1762 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1763 *
1764 * @pinstance: pointer to per adapter instance structure
1765 *
1766 * Return value:
1767 * none
1768 */
1769static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1770{
1771 struct pmcraid_hcam_ldn *hcam_ldn;
1772 u32 ioasc;
1773
1774 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1775
1776 pmcraid_info
1777 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1778 pinstance->ldn.hcam->ilid,
1779 pinstance->ldn.hcam->op_code,
1780 pinstance->ldn.hcam->notification_type,
1781 pinstance->ldn.hcam->notification_lost,
1782 pinstance->ldn.hcam->flags,
1783 pinstance->ldn.hcam->overlay_id);
1784
1785 /* log only the errors, no need to log informational log entries */
1786 if (pinstance->ldn.hcam->notification_type !=
1787 NOTIFICATION_TYPE_ERROR_LOG)
1788 return;
1789
1790 if (pinstance->ldn.hcam->notification_lost ==
1791 HOSTRCB_NOTIFICATIONS_LOST)
34876402 1792 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
89a36810
AR		 1793
1794 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1795
1796 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1797 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
34876402 1798 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1799 "UnitAttention due to IOA Bus Reset\n");
1800 scsi_report_bus_reset(
1801 pinstance->host,
1802 RES_BUS(hcam_ldn->error_log.fd_ra));
1803 }
1804
1805 return;
1806}
1807
1808/**
1809 * pmcraid_process_ccn - Op done function for a CCN.
1810 * @cmd: pointer to command struct
1811 *
1812 * This function is the op done function for a configuration
1813 * change notification
1814 *
1815 * Return value:
1816 * none
1817 */
1818static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1819{
1820 struct pmcraid_instance *pinstance = cmd->drv_inst;
1821 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1822 unsigned long lock_flags;
1823
1824 pinstance->ccn.cmd = NULL;
1825 pmcraid_return_cmd(cmd);
1826
1827 /* If driver initiated IOA reset happened while this hcam was pending
1828 * with IOA, or IOA bringdown sequence is in progress, no need to
1829 * re-register the hcam
1830 */
1831 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1832 atomic_read(&pinstance->ccn.ignore) == 1) {
1833 return;
1834 } else if (ioasc) {
34876402 1835 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1836 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1837 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1838 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1839 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1840 } else {
1841 pmcraid_handle_config_change(pinstance);
1842 }
1843}
1844
1845/**
1846 * pmcraid_process_ldn - op done function for an LDN
1847 * @cmd: pointer to command block
1848 *
1849 * Return value
1850 * none
1851 */
1852static void pmcraid_initiate_reset(struct pmcraid_instance *);
1853
1854static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1855{
1856 struct pmcraid_instance *pinstance = cmd->drv_inst;
1857 struct pmcraid_hcam_ldn *ldn_hcam =
1858 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1859 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1860 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1861 unsigned long lock_flags;
1862
1863 /* return the command block back to freepool */
1864 pinstance->ldn.cmd = NULL;
1865 pmcraid_return_cmd(cmd);
1866
1867 /* If driver initiated IOA reset happened while this hcam was pending
1868 * with IOA, no need to re-register the hcam as reset engine will do it
1869 * once reset sequence is complete
1870 */
1871 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1872 atomic_read(&pinstance->ccn.ignore) == 1) {
1873 return;
1874 } else if (!ioasc) {
1875 pmcraid_handle_error_log(pinstance);
1876 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1877 spin_lock_irqsave(pinstance->host->host_lock,
1878 lock_flags);
1879 pmcraid_initiate_reset(pinstance);
1880 spin_unlock_irqrestore(pinstance->host->host_lock,
1881 lock_flags);
1882 return;
1883 }
1884 } else {
34876402 1885 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1886 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1887 }
1888 /* send netlink message for HCAM notification if enabled */
1889 if (!pmcraid_disable_aen)
c20c4267 1890 pmcraid_notify_ldn(pinstance);
89a36810
AR		 1891
1892 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1893 if (cmd)
1894 pmcraid_send_hcam_cmd(cmd);
1895}
1896
1897/**
1898 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1899 *
1900 * @pinstance: pointer per adapter instance structure
1901 *
1902 * Return Value
1903 * none
1904 */
1905static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1906{
1907 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1908 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1909}
1910
1911/**
1912 * pmcraid_unregister_hcams - cancel HCAMs registered already
1913 * @cmd: pointer to command used as part of reset sequence
1914 */
1915static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1916{
1917 struct pmcraid_instance *pinstance = cmd->drv_inst;
1918
1919 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1920 * handling hcam response though it is not necessary. In order to
1921 * prevent this, set 'ignore', so that bring-down sequence doesn't
1922 * re-send any more hcams
1923 */
1924 atomic_set(&pinstance->ccn.ignore, 1);
1925 atomic_set(&pinstance->ldn.ignore, 1);
1926
1927 /* If adapter reset was forced as part of runtime reset sequence,
c20c4267
AR		 1928 * start the reset sequence. Reset will be triggered even in case
1929 * IOA unit_check.
89a36810 1930 */
c20c4267
AR		 1931 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1932 pinstance->ioa_unit_check) {
89a36810 1933 pinstance->force_ioa_reset = 0;
c20c4267 1934 pinstance->ioa_unit_check = 0;
89a36810
AR		 1935 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1936 pmcraid_reset_alert(cmd);
1937 return;
1938 }
1939
1940 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1941 * one after the other. So CCN cancellation will be triggered by
1942 * pmcraid_cancel_ldn itself.
1943 */
1944 pmcraid_cancel_ldn(cmd);
1945}
1946
1947/**
1948 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1949 * @pinstance: pointer to adapter instance structure
1950 * Return Value
1951 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1952 */
1953static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1954
1955static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1956{
1957 u32 intrs;
1958
1959 pmcraid_reinit_buffers(pinstance);
1960 intrs = pmcraid_read_interrupts(pinstance);
1961
1962 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1963
1964 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
c20c4267
AR		 1965 if (!pinstance->interrupt_mode) {
1966 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1967 pinstance->int_regs.
1968 ioa_host_interrupt_mask_reg);
1969 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1970 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1971 }
89a36810
AR		 1972 return 1;
1973 } else {
1974 return 0;
1975 }
1976}
1977
1978/**
1979 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1980 * @cmd : pointer to reset command block
1981 *
1982 * Return Value
1983 * none
1984 */
1985static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1986{
1987 struct pmcraid_instance *pinstance = cmd->drv_inst;
1988 u32 int_reg;
1989 u32 doorbell;
1990
1991 /* There will be an interrupt when Transition to Operational bit is
1992 * set so tasklet would execute next reset task. The timeout handler
1993 * would re-initiate a reset
1994 */
1995 cmd->cmd_done = pmcraid_ioa_reset;
1996 cmd->timer.data = (unsigned long)cmd;
1997 cmd->timer.expires = jiffies +
1998 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
1999 cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
2000
2001 if (!timer_pending(&cmd->timer))
2002 add_timer(&cmd->timer);
2003
2004 /* Enable destructive diagnostics on IOA if it is not yet in
2005 * operational state
2006 */
2007 doorbell = DOORBELL_RUNTIME_RESET |
2008 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
2009
c20c4267
AR		 2010 /* Since we do RESET_ALERT and Start BIST we have to again write
2011 * MSIX Doorbell to indicate the interrupt mode
2012 */
2013 if (pinstance->interrupt_mode) {
2014 iowrite32(DOORBELL_INTR_MODE_MSIX,
2015 pinstance->int_regs.host_ioa_interrupt_reg);
2016 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
2017 }
2018
89a36810 2019 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
c20c4267 2020 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
89a36810 2021 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
c20c4267 2022
89a36810
AR		 2023 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2024 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2025 int_reg);
2026}
2027
2028/**
2029 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2030 *
2031 * @pinstance: pointer to adapter instance structure
2032 *
2033 * Return Value
2034 * none
2035 */
2036static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
2037{
2038 pmcraid_info("%s is not yet implemented\n", __func__);
2039}
2040
2041/**
2042 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2043 * @pinstance: pointer to adapter instance structure
2044 *
2045 * This function fails all outstanding ops. If they are submitted to IOA
2046 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2047 * otherwise just completes the commands and returns the cmd blocks to free
2048 * pool.
2049 *
2050 * Return value:
2051 * none
2052 */
2053static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
2054{
2055 struct pmcraid_cmd *cmd, *temp;
2056 unsigned long lock_flags;
2057
2058 /* pending command list is protected by pending_pool_lock. Its
2059 * traversal must be done as within this lock
2060 */
2061 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2062 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
2063 free_list) {
2064 list_del(&cmd->free_list);
2065 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2066 lock_flags);
2067 cmd->ioa_cb->ioasa.ioasc =
2068 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
2069 cmd->ioa_cb->ioasa.ilid =
2070 cpu_to_be32(PMCRAID_DRIVER_ILID);
2071
2072 /* In case the command timer is still running */
2073 del_timer(&cmd->timer);
2074
2075 /* If this is an IO command, complete it by invoking scsi_done
2076 * function. If this is one of the internal commands other
2077 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2078 * complete it
2079 */
2080 if (cmd->scsi_cmd) {
2081
2082 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2083 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2084
2085 scsi_cmd->result |= DID_ERROR << 16;
2086
2087 scsi_dma_unmap(scsi_cmd);
2088 pmcraid_return_cmd(cmd);
2089
89a36810
AR		 2090 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2091 le32_to_cpu(resp) >> 2,
2092 cmd->ioa_cb->ioarcb.cdb[0],
2093 scsi_cmd->result);
2094 scsi_cmd->scsi_done(scsi_cmd);
2095 } else if (cmd->cmd_done == pmcraid_internal_done ||
2096 cmd->cmd_done == pmcraid_erp_done) {
2097 cmd->cmd_done(cmd);
c20c4267
AR		 2098 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2099 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
89a36810
AR		 2100 pmcraid_return_cmd(cmd);
2101 }
2102
2103 atomic_dec(&pinstance->outstanding_cmds);
2104 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2105 }
2106
2107 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2108}
2109
2110/**
2111 * pmcraid_ioa_reset - Implementation of IOA reset logic
2112 *
2113 * @cmd: pointer to the cmd block to be used for entire reset process
2114 *
2115 * This function executes most of the steps required for IOA reset. This gets
2116 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2117 * 'eh_' thread. Access to variables used for controling the reset sequence is
2118 * synchronized using host lock. Various functions called during reset process
2119 * would make use of a single command block, pointer to which is also stored in
2120 * adapter instance structure.
2121 *
2122 * Return Value
2123 * None
2124 */
2125static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2126{
2127 struct pmcraid_instance *pinstance = cmd->drv_inst;
2128 u8 reset_complete = 0;
2129
2130 pinstance->ioa_reset_in_progress = 1;
2131
2132 if (pinstance->reset_cmd != cmd) {
2133 pmcraid_err("reset is called with different command block\n");
2134 pinstance->reset_cmd = cmd;
2135 }
2136
2137 pmcraid_info("reset_engine: state = %d, command = %p\n",
2138 pinstance->ioa_state, cmd);
2139
2140 switch (pinstance->ioa_state) {
2141
2142 case IOA_STATE_DEAD:
2143 /* If IOA is offline, whatever may be the reset reason, just
2144 * return. callers might be waiting on the reset wait_q, wake
2145 * up them
2146 */
2147 pmcraid_err("IOA is offline no reset is possible\n");
2148 reset_complete = 1;
2149 break;
2150
2151 case IOA_STATE_IN_BRINGDOWN:
2152 /* we enter here, once ioa shutdown command is processed by IOA
2153 * Alert IOA for a possible reset. If reset alert fails, IOA
2154 * goes through hard-reset
2155 */
2156 pmcraid_disable_interrupts(pinstance, ~0);
2157 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2158 pmcraid_reset_alert(cmd);
2159 break;
2160
2161 case IOA_STATE_UNKNOWN:
2162 /* We may be called during probe or resume. Some pre-processing
2163 * is required for prior to reset
2164 */
2165 scsi_block_requests(pinstance->host);
2166
2167 /* If asked to reset while IOA was processing responses or
2168 * there are any error responses then IOA may require
2169 * hard-reset.
2170 */
2171 if (pinstance->ioa_hard_reset == 0) {
2172 if (ioread32(pinstance->ioa_status) &
2173 INTRS_TRANSITION_TO_OPERATIONAL) {
2174 pmcraid_info("sticky bit set, bring-up\n");
2175 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2176 pmcraid_reinit_cmdblk(cmd);
2177 pmcraid_identify_hrrq(cmd);
2178 } else {
2179 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2180 pmcraid_soft_reset(cmd);
2181 }
2182 } else {
2183 /* Alert IOA of a possible reset and wait for critical
2184 * operation in progress bit to reset
2185 */
2186 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2187 pmcraid_reset_alert(cmd);
2188 }
2189 break;
2190
2191 case IOA_STATE_IN_RESET_ALERT:
2192 /* If critical operation in progress bit is reset or wait gets
2193 * timed out, reset proceeds with starting BIST on the IOA.
2194 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2195 * they are 3 or more, reset engine marks IOA dead and returns
2196 */
2197 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2198 pmcraid_start_bist(cmd);
2199 break;
2200
2201 case IOA_STATE_IN_HARD_RESET:
2202 pinstance->ioa_reset_attempts++;
2203
2204 /* retry reset if we haven't reached maximum allowed limit */
2205 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2206 pinstance->ioa_reset_attempts = 0;
2207 pmcraid_err("IOA didn't respond marking it as dead\n");
2208 pinstance->ioa_state = IOA_STATE_DEAD;
c20c4267
AR		 2209
2210 if (pinstance->ioa_bringdown)
2211 pmcraid_notify_ioastate(pinstance,
2212 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2213 else
2214 pmcraid_notify_ioastate(pinstance,
2215 PMC_DEVICE_EVENT_RESET_FAILED);
89a36810
AR		 2216 reset_complete = 1;
2217 break;
2218 }
2219
2220 /* Once either bist or pci reset is done, restore PCI config
2221 * space. If this fails, proceed with hard reset again
2222 */
89a36810
AR		 2223 if (pci_restore_state(pinstance->pdev)) {
2224 pmcraid_info("config-space error resetting again\n");
2225 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2226 pmcraid_reset_alert(cmd);
2227 break;
2228 }
2229
2230 /* fail all pending commands */
2231 pmcraid_fail_outstanding_cmds(pinstance);
2232
2233 /* check if unit check is active, if so extract dump */
2234 if (pinstance->ioa_unit_check) {
2235 pmcraid_info("unit check is active\n");
2236 pinstance->ioa_unit_check = 0;
2237 pmcraid_get_dump(pinstance);
2238 pinstance->ioa_reset_attempts--;
2239 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2240 pmcraid_reset_alert(cmd);
2241 break;
2242 }
2243
2244 /* if the reset reason is to bring-down the ioa, we might be
2245 * done with the reset restore pci_config_space and complete
2246 * the reset
2247 */
2248 if (pinstance->ioa_bringdown) {
2249 pmcraid_info("bringing down the adapter\n");
2250 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2251 pinstance->ioa_bringdown = 0;
2252 pinstance->ioa_state = IOA_STATE_UNKNOWN;
c20c4267
AR		 2253 pmcraid_notify_ioastate(pinstance,
2254 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
89a36810
AR		 2255 reset_complete = 1;
2256 } else {
2257 /* bring-up IOA, so proceed with soft reset
2258 * Reinitialize hrrq_buffers and their indices also
2259 * enable interrupts after a pci_restore_state
2260 */
2261 if (pmcraid_reset_enable_ioa(pinstance)) {
2262 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2263 pmcraid_info("bringing up the adapter\n");
2264 pmcraid_reinit_cmdblk(cmd);
2265 pmcraid_identify_hrrq(cmd);
2266 } else {
2267 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2268 pmcraid_soft_reset(cmd);
2269 }
2270 }
2271 break;
2272
2273 case IOA_STATE_IN_SOFT_RESET:
2274 /* TRANSITION TO OPERATIONAL is on so start initialization
2275 * sequence
2276 */
2277 pmcraid_info("In softreset proceeding with bring-up\n");
2278 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2279
2280 /* Initialization commands start with HRRQ identification. From
2281 * now on tasklet completes most of the commands as IOA is up
2282 * and intrs are enabled
2283 */
2284 pmcraid_identify_hrrq(cmd);
2285 break;
2286
2287 case IOA_STATE_IN_BRINGUP:
2288 /* we are done with bringing up of IOA, change the ioa_state to
2289 * operational and wake up any waiters
2290 */
2291 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2292 reset_complete = 1;
2293 break;
2294
2295 case IOA_STATE_OPERATIONAL:
2296 default:
2297 /* When IOA is operational and a reset is requested, check for
2298 * the reset reason. If reset is to bring down IOA, unregister
2299 * HCAMs and initiate shutdown; if adapter reset is forced then
2300 * restart reset sequence again
2301 */
2302 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2303 pinstance->force_ioa_reset == 0) {
c20c4267
AR		 2304 pmcraid_notify_ioastate(pinstance,
2305 PMC_DEVICE_EVENT_RESET_SUCCESS);
89a36810
AR		 2306 reset_complete = 1;
2307 } else {
2308 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2309 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2310 pmcraid_reinit_cmdblk(cmd);
2311 pmcraid_unregister_hcams(cmd);
2312 }
2313 break;
2314 }
2315
2316 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2317 * OPERATIONAL. Reset all control variables used during reset, wake up
2318 * any waiting threads and let the SCSI mid-layer send commands. Note
2319 * that host_lock must be held before invoking scsi_report_bus_reset.
2320 */
2321 if (reset_complete) {
2322 pinstance->ioa_reset_in_progress = 0;
2323 pinstance->ioa_reset_attempts = 0;
2324 pinstance->reset_cmd = NULL;
2325 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2326 pinstance->ioa_bringdown = 0;
2327 pmcraid_return_cmd(cmd);
2328
2329 /* If target state is to bring up the adapter, proceed with
2330 * hcam registration and resource exposure to mid-layer.
2331 */
2332 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2333 pmcraid_register_hcams(pinstance);
2334
2335 wake_up_all(&pinstance->reset_wait_q);
2336 }
2337
2338 return;
2339}
2340
2341/**
2342 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2343 * ISR/tasklet during error interrupts including IOA unit check. If reset
2344 * is already in progress, it just returns, otherwise initiates IOA reset
2345 * to bring IOA up to operational state.
2346 *
2347 * @pinstance: pointer to adapter instance structure
2348 *
2349 * Return value
2350 * none
2351 */
2352static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2353{
2354 struct pmcraid_cmd *cmd;
2355
2356 /* If the reset is already in progress, just return, otherwise start
2357 * reset sequence and return
2358 */
2359 if (!pinstance->ioa_reset_in_progress) {
2360 scsi_block_requests(pinstance->host);
2361 cmd = pmcraid_get_free_cmd(pinstance);
2362
2363 if (cmd == NULL) {
2364 pmcraid_err("no cmnd blocks for initiate_reset\n");
2365 return;
2366 }
2367
2368 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2369 pinstance->reset_cmd = cmd;
2370 pinstance->force_ioa_reset = 1;
c20c4267
AR		 2371 pmcraid_notify_ioastate(pinstance,
2372 PMC_DEVICE_EVENT_RESET_START);
89a36810
AR		 2373 pmcraid_ioa_reset(cmd);
2374 }
2375}
2376
2377/**
2378 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2379 * or bringdown IOA
2380 * @pinstance: pointer adapter instance structure
2381 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2382 * @target_state: expected target state after reset
2383 *
2384 * Note: This command initiates reset and waits for its completion. Hence this
2385 * should not be called from isr/timer/tasklet functions (timeout handlers,
2386 * error response handlers and interrupt handlers).
2387 *
2388 * Return Value
2389 * 1 in case ioa_state is not target_state, 0 otherwise.
2390 */
2391static int pmcraid_reset_reload(
2392 struct pmcraid_instance *pinstance,
2393 u8 shutdown_type,
2394 u8 target_state
2395)
2396{
2397 struct pmcraid_cmd *reset_cmd = NULL;
2398 unsigned long lock_flags;
2399 int reset = 1;
2400
2401 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2402
2403 if (pinstance->ioa_reset_in_progress) {
2404 pmcraid_info("reset_reload: reset is already in progress\n");
2405
2406 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2407
2408 wait_event(pinstance->reset_wait_q,
2409 !pinstance->ioa_reset_in_progress);
2410
2411 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2412
2413 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2414 spin_unlock_irqrestore(pinstance->host->host_lock,
2415 lock_flags);
2416 pmcraid_info("reset_reload: IOA is dead\n");
2417 return reset;
2418 } else if (pinstance->ioa_state == target_state) {
2419 reset = 0;
2420 }
2421 }
2422
2423 if (reset) {
2424 pmcraid_info("reset_reload: proceeding with reset\n");
2425 scsi_block_requests(pinstance->host);
2426 reset_cmd = pmcraid_get_free_cmd(pinstance);
2427
2428 if (reset_cmd == NULL) {
2429 pmcraid_err("no free cmnd for reset_reload\n");
2430 spin_unlock_irqrestore(pinstance->host->host_lock,
2431 lock_flags);
2432 return reset;
2433 }
2434
2435 if (shutdown_type == SHUTDOWN_NORMAL)
2436 pinstance->ioa_bringdown = 1;
2437
2438 pinstance->ioa_shutdown_type = shutdown_type;
2439 pinstance->reset_cmd = reset_cmd;
2440 pinstance->force_ioa_reset = reset;
2441 pmcraid_info("reset_reload: initiating reset\n");
2442 pmcraid_ioa_reset(reset_cmd);
2443 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2444 pmcraid_info("reset_reload: waiting for reset to complete\n");
2445 wait_event(pinstance->reset_wait_q,
2446 !pinstance->ioa_reset_in_progress);
2447
c20c4267 2448 pmcraid_info("reset_reload: reset is complete !!\n");
89a36810
AR		 2449 scsi_unblock_requests(pinstance->host);
2450 if (pinstance->ioa_state == target_state)
2451 reset = 0;
2452 }
2453
2454 return reset;
2455}
2456
2457/**
2458 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2459 *
2460 * @pinstance: pointer to adapter instance structure
2461 *
2462 * Return Value
2463 * whatever is returned from pmcraid_reset_reload
2464 */
2465static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2466{
2467 return pmcraid_reset_reload(pinstance,
2468 SHUTDOWN_NORMAL,
2469 IOA_STATE_UNKNOWN);
2470}
2471
2472/**
2473 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2474 *
2475 * @pinstance: pointer to adapter instance structure
2476 *
2477 * Return Value
2478 * whatever is returned from pmcraid_reset_reload
2479 */
2480static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2481{
c20c4267
AR		 2482 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2483
89a36810
AR		 2484 return pmcraid_reset_reload(pinstance,
2485 SHUTDOWN_NONE,
2486 IOA_STATE_OPERATIONAL);
2487}
2488
2489/**
2490 * pmcraid_request_sense - Send request sense to a device
2491 * @cmd: pmcraid command struct
2492 *
2493 * This function sends a request sense to a device as a result of a check
2494 * condition. This method re-uses the same command block that failed earlier.
2495 */
2496static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2497{
2498 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2499 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2500
2501 /* allocate DMAable memory for sense buffers */
2502 cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
2503 SCSI_SENSE_BUFFERSIZE,
2504 &cmd->sense_buffer_dma);
2505
2506 if (cmd->sense_buffer == NULL) {
2507 pmcraid_err
2508 ("couldn't allocate sense buffer for request sense\n");
2509 pmcraid_erp_done(cmd);
2510 return;
2511 }
2512
2513 /* re-use the command block */
2514 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2515 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2516 ioarcb->request_flags0 = (SYNC_COMPLETE |
2517 NO_LINK_DESCS |
2518 INHIBIT_UL_CHECK);
2519 ioarcb->request_type = REQ_TYPE_SCSI;
2520 ioarcb->cdb[0] = REQUEST_SENSE;
2521 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2522
2523 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2524 offsetof(struct pmcraid_ioarcb,
2525 add_data.u.ioadl[0]));
2526 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2527
2528 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2529
2530 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2531 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
88197966 2532 ioadl->flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 2533
2534 /* request sense might be called as part of error response processing
2535 * which runs in tasklets context. It is possible that mid-layer might
2536 * schedule queuecommand during this time, hence, writting to IOARRIN
2537 * must be protect by host_lock
2538 */
2539 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2540 PMCRAID_REQUEST_SENSE_TIMEOUT,
2541 pmcraid_timeout_handler);
2542}
2543
2544/**
2545 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2546 * @cmd: command that failed
2547 * @sense: true if request_sense is required after cancel all
2548 *
2549 * This function sends a cancel all to a device to clear the queue.
2550 */
2551static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
2552{
2553 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2554 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2555 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2556 void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
2557 : pmcraid_request_sense;
2558
2559 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2560 ioarcb->request_flags0 = SYNC_OVERRIDE;
2561 ioarcb->request_type = REQ_TYPE_IOACMD;
2562 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2563
2564 if (RES_IS_GSCSI(res->cfg_entry))
2565 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2566
2567 ioarcb->ioadl_bus_addr = 0;
2568 ioarcb->ioadl_length = 0;
2569 ioarcb->data_transfer_length = 0;
2570 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
2571
2572 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2573 * schedule queuecommand while we are doing this
2574 */
2575 pmcraid_send_cmd(cmd, cmd_done,
2576 PMCRAID_REQUEST_SENSE_TIMEOUT,
2577 pmcraid_timeout_handler);
2578}
2579
2580/**
2581 * pmcraid_frame_auto_sense: frame fixed format sense information
2582 *
2583 * @cmd: pointer to failing command block
2584 *
2585 * Return value
2586 * none
2587 */
2588static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2589{
2590 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2591 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2592 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2593 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2594 u32 failing_lba = 0;
2595
2596 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2597 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2598
2599 if (RES_IS_VSET(res->cfg_entry) &&
2600 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2601 ioasa->u.vset.failing_lba_hi != 0) {
2602
2603 sense_buf[0] = 0x72;
2604 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2605 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2606 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2607
2608 sense_buf[7] = 12;
2609 sense_buf[8] = 0;
2610 sense_buf[9] = 0x0A;
2611 sense_buf[10] = 0x80;
2612
2613 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2614
2615 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2616 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2617 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2618 sense_buf[15] = failing_lba & 0x000000ff;
2619
2620 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2621
2622 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2623 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2624 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2625 sense_buf[19] = failing_lba & 0x000000ff;
2626 } else {
2627 sense_buf[0] = 0x70;
2628 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2629 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2630 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2631
2632 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2633 if (RES_IS_VSET(res->cfg_entry))
2634 failing_lba =
2635 le32_to_cpu(ioasa->u.
2636 vset.failing_lba_lo);
2637 sense_buf[0] |= 0x80;
2638 sense_buf[3] = (failing_lba >> 24) & 0xff;
2639 sense_buf[4] = (failing_lba >> 16) & 0xff;
2640 sense_buf[5] = (failing_lba >> 8) & 0xff;
2641 sense_buf[6] = failing_lba & 0xff;
2642 }
2643
2644 sense_buf[7] = 6; /* additional length */
2645 }
2646}
2647
2648/**
2649 * pmcraid_error_handler - Error response handlers for a SCSI op
2650 * @cmd: pointer to pmcraid_cmd that has failed
2651 *
2652 * This function determines whether or not to initiate ERP on the affected
2653 * device. This is called from a tasklet, which doesn't hold any locks.
2654 *
2655 * Return value:
2656 * 0 it caller can complete the request, otherwise 1 where in error
2657 * handler itself completes the request and returns the command block
2658 * back to free-pool
2659 */
2660static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2661{
2662 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2663 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2664 struct pmcraid_instance *pinstance = cmd->drv_inst;
2665 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2666 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2667 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2668 u32 sense_copied = 0;
2669
2670 if (!res) {
2671 pmcraid_info("resource pointer is NULL\n");
2672 return 0;
2673 }
2674
2675 /* If this was a SCSI read/write command keep count of errors */
2676 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2677 atomic_inc(&res->read_failures);
2678 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2679 atomic_inc(&res->write_failures);
2680
2681 if (!RES_IS_GSCSI(res->cfg_entry) &&
2682 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2683 pmcraid_frame_auto_sense(cmd);
2684 }
2685
2686 /* Log IOASC/IOASA information based on user settings */
2687 pmcraid_ioasc_logger(ioasc, cmd);
2688
2689 switch (masked_ioasc) {
2690
2691 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2692 scsi_cmd->result |= (DID_ABORT << 16);
2693 break;
2694
2695 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2696 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2697 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2698 break;
2699
2700 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2701 res->sync_reqd = 1;
2702 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2703 break;
2704
2705 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2706 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2707 break;
2708
2709 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2710 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2711 if (!res->reset_progress)
2712 scsi_report_bus_reset(pinstance->host,
2713 scsi_cmd->device->channel);
2714 scsi_cmd->result |= (DID_ERROR << 16);
2715 break;
2716
2717 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2718 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2719 res->sync_reqd = 1;
2720
2721 /* if check_condition is not active return with error otherwise
2722 * get/frame the sense buffer
2723 */
2724 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2725 SAM_STAT_CHECK_CONDITION &&
2726 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2727 return 0;
2728
2729 /* If we have auto sense data as part of IOASA pass it to
2730 * mid-layer
2731 */
2732 if (ioasa->auto_sense_length != 0) {
2733 short sense_len = ioasa->auto_sense_length;
2734 int data_size = min_t(u16, le16_to_cpu(sense_len),
2735 SCSI_SENSE_BUFFERSIZE);
2736
2737 memcpy(scsi_cmd->sense_buffer,
2738 ioasa->sense_data,
2739 data_size);
2740 sense_copied = 1;
2741 }
2742
a70757ba 2743 if (RES_IS_GSCSI(res->cfg_entry))
89a36810 2744 pmcraid_cancel_all(cmd, sense_copied);
a70757ba 2745 else if (sense_copied)
89a36810 2746 pmcraid_erp_done(cmd);
a70757ba 2747 else
89a36810 2748 pmcraid_request_sense(cmd);
89a36810
AR		 2749
2750 return 1;
2751
2752 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2753 break;
2754
2755 default:
2756 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2757 scsi_cmd->result |= (DID_ERROR << 16);
2758 break;
2759 }
2760 return 0;
2761}
2762
2763/**
2764 * pmcraid_reset_device - device reset handler functions
2765 *
2766 * @scsi_cmd: scsi command struct
2767 * @modifier: reset modifier indicating the reset sequence to be performed
2768 *
2769 * This function issues a device reset to the affected device.
2770 * A LUN reset will be sent to the device first. If that does
2771 * not work, a target reset will be sent.
2772 *
2773 * Return value:
2774 * SUCCESS / FAILED
2775 */
2776static int pmcraid_reset_device(
2777 struct scsi_cmnd *scsi_cmd,
2778 unsigned long timeout,
2779 u8 modifier
2780)
2781{
2782 struct pmcraid_cmd *cmd;
2783 struct pmcraid_instance *pinstance;
2784 struct pmcraid_resource_entry *res;
2785 struct pmcraid_ioarcb *ioarcb;
2786 unsigned long lock_flags;
2787 u32 ioasc;
2788
2789 pinstance =
2790 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2791 res = scsi_cmd->device->hostdata;
2792
2793 if (!res) {
34876402
AR		 2794 sdev_printk(KERN_ERR, scsi_cmd->device,
2795 "reset_device: NULL resource pointer\n");
89a36810
AR		 2796 return FAILED;
2797 }
2798
2799 /* If adapter is currently going through reset/reload, return failed.
2800 * This will force the mid-layer to call _eh_bus/host reset, which
2801 * will then go to sleep and wait for the reset to complete
2802 */
2803 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2804 if (pinstance->ioa_reset_in_progress ||
2805 pinstance->ioa_state == IOA_STATE_DEAD) {
2806 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2807 return FAILED;
2808 }
2809
2810 res->reset_progress = 1;
2811 pmcraid_info("Resetting %s resource with addr %x\n",
2812 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2813 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2814 le32_to_cpu(res->cfg_entry.resource_address));
2815
2816 /* get a free cmd block */
2817 cmd = pmcraid_get_free_cmd(pinstance);
2818
2819 if (cmd == NULL) {
2820 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2821 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2822 return FAILED;
2823 }
2824
2825 ioarcb = &cmd->ioa_cb->ioarcb;
2826 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2827 ioarcb->request_type = REQ_TYPE_IOACMD;
2828 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2829
2830 /* Initialize reset modifier bits */
2831 if (modifier)
2832 modifier = ENABLE_RESET_MODIFIER | modifier;
2833
2834 ioarcb->cdb[1] = modifier;
2835
2836 init_completion(&cmd->wait_for_completion);
2837 cmd->completion_req = 1;
2838
2839 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2840 cmd->ioa_cb->ioarcb.cdb[0],
2841 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2842 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2843
2844 pmcraid_send_cmd(cmd,
2845 pmcraid_internal_done,
2846 timeout,
2847 pmcraid_timeout_handler);
2848
2849 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2850
2851 /* RESET_DEVICE command completes after all pending IOARCBs are
2852 * completed. Once this command is completed, pmcraind_internal_done
2853 * will wake up the 'completion' queue.
2854 */
2855 wait_for_completion(&cmd->wait_for_completion);
2856
2857 /* complete the command here itself and return the command block
2858 * to free list
2859 */
2860 pmcraid_return_cmd(cmd);
2861 res->reset_progress = 0;
2862 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2863
2864 /* set the return value based on the returned ioasc */
2865 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2866}
2867
2868/**
2869 * _pmcraid_io_done - helper for pmcraid_io_done function
2870 *
2871 * @cmd: pointer to pmcraid command struct
2872 * @reslen: residual data length to be set in the ioasa
2873 * @ioasc: ioasc either returned by IOA or set by driver itself.
2874 *
2875 * This function is invoked by pmcraid_io_done to complete mid-layer
2876 * scsi ops.
2877 *
2878 * Return value:
2879 * 0 if caller is required to return it to free_pool. Returns 1 if
2880 * caller need not worry about freeing command block as error handler
2881 * will take care of that.
2882 */
2883
2884static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2885{
2886 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2887 int rc = 0;
2888
2889 scsi_set_resid(scsi_cmd, reslen);
2890
2891 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2892 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2893 cmd->ioa_cb->ioarcb.cdb[0],
2894 ioasc, scsi_cmd->result);
2895
2896 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2897 rc = pmcraid_error_handler(cmd);
2898
2899 if (rc == 0) {
2900 scsi_dma_unmap(scsi_cmd);
2901 scsi_cmd->scsi_done(scsi_cmd);
2902 }
2903
2904 return rc;
2905}
2906
2907/**
2908 * pmcraid_io_done - SCSI completion function
2909 *
2910 * @cmd: pointer to pmcraid command struct
2911 *
2912 * This function is invoked by tasklet/mid-layer error handler to completing
2913 * the SCSI ops sent from mid-layer.
2914 *
2915 * Return value
2916 * none
2917 */
2918
2919static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2920{
2921 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2922 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2923
2924 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2925 pmcraid_return_cmd(cmd);
2926}
2927
2928/**
2929 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2930 *
2931 * @cmd: command block of the command to be aborted
2932 *
2933 * Return Value:
2934 * returns pointer to command structure used as cancelling cmd
2935 */
2936static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2937{
2938 struct pmcraid_cmd *cancel_cmd;
2939 struct pmcraid_instance *pinstance;
2940 struct pmcraid_resource_entry *res;
2941
2942 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2943 res = cmd->scsi_cmd->device->hostdata;
2944
2945 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2946
2947 if (cancel_cmd == NULL) {
2948 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2949 return NULL;
2950 }
2951
2952 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2953
2954 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2955 cmd->ioa_cb->ioarcb.cdb[0],
2956 cmd->ioa_cb->ioarcb.response_handle >> 2);
2957
2958 init_completion(&cancel_cmd->wait_for_completion);
2959 cancel_cmd->completion_req = 1;
2960
2961 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2962 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
c20c4267 2963 cancel_cmd->ioa_cb->ioarcb.cdb[0],
89a36810
AR		 2964 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2965
2966 pmcraid_send_cmd(cancel_cmd,
2967 pmcraid_internal_done,
2968 PMCRAID_INTERNAL_TIMEOUT,
2969 pmcraid_timeout_handler);
2970 return cancel_cmd;
2971}
2972
2973/**
2974 * pmcraid_abort_complete - Waits for ABORT TASK completion
2975 *
2976 * @cancel_cmd: command block use as cancelling command
2977 *
2978 * Return Value:
2979 * returns SUCCESS if ABORT TASK has good completion
2980 * otherwise FAILED
2981 */
2982static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2983{
2984 struct pmcraid_resource_entry *res;
2985 u32 ioasc;
2986
2987 wait_for_completion(&cancel_cmd->wait_for_completion);
c20c4267
AR		 2988 res = cancel_cmd->res;
2989 cancel_cmd->res = NULL;
89a36810
AR		 2990 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2991
2992 /* If the abort task is not timed out we will get a Good completion
2993 * as sense_key, otherwise we may get one the following responses
2994 * due to subsquent bus reset or device reset. In case IOASC is
2995 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2996 */
2997 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
2998 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
2999 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
3000 res->sync_reqd = 1;
3001 ioasc = 0;
3002 }
3003
3004 /* complete the command here itself */
3005 pmcraid_return_cmd(cancel_cmd);
3006 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
3007}
3008
3009/**
3010 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3011 *
3012 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3013 * mid-layer ensures that no other commands are queued. This
3014 * never gets called under interrupt, but a separate eh thread.
3015 *
3016 * Return value:
3017 * SUCCESS / FAILED
3018 */
3019static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
3020{
3021 struct pmcraid_instance *pinstance;
3022 struct pmcraid_cmd *cmd;
3023 struct pmcraid_resource_entry *res;
3024 unsigned long host_lock_flags;
3025 unsigned long pending_lock_flags;
3026 struct pmcraid_cmd *cancel_cmd = NULL;
3027 int cmd_found = 0;
3028 int rc = FAILED;
3029
3030 pinstance =
3031 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3032
34876402
AR		 3033 scmd_printk(KERN_INFO, scsi_cmd,
3034 "I/O command timed out, aborting it.\n");
89a36810
AR		 3035
3036 res = scsi_cmd->device->hostdata;
3037
3038 if (res == NULL)
3039 return rc;
3040
3041 /* If we are currently going through reset/reload, return failed.
3042 * This will force the mid-layer to eventually call
3043 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3044 * reset to complete
3045 */
3046 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
3047
3048 if (pinstance->ioa_reset_in_progress ||
3049 pinstance->ioa_state == IOA_STATE_DEAD) {
3050 spin_unlock_irqrestore(pinstance->host->host_lock,
3051 host_lock_flags);
3052 return rc;
3053 }
3054
3055 /* loop over pending cmd list to find cmd corresponding to this
3056 * scsi_cmd. Note that this command might not have been completed
3057 * already. locking: all pending commands are protected with
3058 * pending_pool_lock.
3059 */
3060 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
3061 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
3062
3063 if (cmd->scsi_cmd == scsi_cmd) {
3064 cmd_found = 1;
3065 break;
3066 }
3067 }
3068
3069 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3070 pending_lock_flags);
3071
3072 /* If the command to be aborted was given to IOA and still pending with
3073 * it, send ABORT_TASK to abort this and wait for its completion
3074 */
3075 if (cmd_found)
3076 cancel_cmd = pmcraid_abort_cmd(cmd);
3077
3078 spin_unlock_irqrestore(pinstance->host->host_lock,
3079 host_lock_flags);
3080
3081 if (cancel_cmd) {
c20c4267 3082 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
89a36810
AR		 3083 rc = pmcraid_abort_complete(cancel_cmd);
3084 }
3085
3086 return cmd_found ? rc : SUCCESS;
3087}
3088
3089/**
3090 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3091 *
3092 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3093 *
3094 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3095 * Since these are called from mid-layer EH thread, no other IO will be queued
3096 * to the resource being reset. However, control path (IOCTL) may be active so
3097 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3098 * takes care by locking/unlocking host_lock.
3099 *
3100 * Return value
c20c4267 3101 * SUCCESS or FAILED
89a36810
AR		 3102 */
3103static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3104{
34876402
AR		 3105 scmd_printk(KERN_INFO, scmd,
3106 "resetting device due to an I/O command timeout.\n");
89a36810
AR		 3107 return pmcraid_reset_device(scmd,
3108 PMCRAID_INTERNAL_TIMEOUT,
3109 RESET_DEVICE_LUN);
3110}
3111
3112static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3113{
34876402
AR		 3114 scmd_printk(KERN_INFO, scmd,
3115 "Doing bus reset due to an I/O command timeout.\n");
89a36810
AR		 3116 return pmcraid_reset_device(scmd,
3117 PMCRAID_RESET_BUS_TIMEOUT,
3118 RESET_DEVICE_BUS);
3119}
3120
3121static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3122{
34876402
AR		 3123 scmd_printk(KERN_INFO, scmd,
3124 "Doing target reset due to an I/O command timeout.\n");
89a36810
AR		 3125 return pmcraid_reset_device(scmd,
3126 PMCRAID_INTERNAL_TIMEOUT,
3127 RESET_DEVICE_TARGET);
3128}
3129
3130/**
3131 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3132 *
3133 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3134 *
3135 * Initiates adapter reset to bring it up to operational state
3136 *
3137 * Return value
c20c4267 3138 * SUCCESS or FAILED
89a36810
AR		 3139 */
3140static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3141{
3142 unsigned long interval = 10000; /* 10 seconds interval */
3143 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3144 struct pmcraid_instance *pinstance =
3145 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3146
3147
3148 /* wait for an additional 150 seconds just in case firmware could come
3149 * up and if it could complete all the pending commands excluding the
3150 * two HCAM (CCN and LDN).
3151 */
3152 while (waits--) {
3153 if (atomic_read(&pinstance->outstanding_cmds) <=
3154 PMCRAID_MAX_HCAM_CMD)
3155 return SUCCESS;
3156 msleep(interval);
3157 }
3158
3159 dev_err(&pinstance->pdev->dev,
3160 "Adapter being reset due to an I/O command timeout.\n");
3161 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3162}
3163
3164/**
3165 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3166 * @scsi_cmd: scsi command struct
3167 *
3168 * Return value
3169 * number of tags or 0 if the task is not tagged
3170 */
3171static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
3172{
3173 char tag[2];
3174 u8 rc = 0;
3175
3176 if (scsi_populate_tag_msg(scsi_cmd, tag)) {
3177 switch (tag[0]) {
3178 case MSG_SIMPLE_TAG:
3179 rc = TASK_TAG_SIMPLE;
3180 break;
3181 case MSG_HEAD_TAG:
3182 rc = TASK_TAG_QUEUE_HEAD;
3183 break;
3184 case MSG_ORDERED_TAG:
3185 rc = TASK_TAG_ORDERED;
3186 break;
3187 };
3188 }
3189
3190 return rc;
3191}
3192
3193
3194/**
3195 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3196 * @cmd: pmcraid command struct
3197 * @sgcount: count of scatter-gather elements
3198 *
3199 * Return value
3200 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3201 * or external IOADLs
3202 */
3203struct pmcraid_ioadl_desc *
3204pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3205{
3206 struct pmcraid_ioadl_desc *ioadl;
3207 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3208 int ioadl_count = 0;
3209
3210 if (ioarcb->add_cmd_param_length)
3211 ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
3212 ioarcb->ioadl_length =
3213 sizeof(struct pmcraid_ioadl_desc) * sgcount;
3214
3215 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3216 /* external ioadls start at offset 0x80 from control_block
3217 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3218 * It is necessary to indicate to firmware that driver is
3219 * using ioadls to be treated as external to IOARCB.
3220 */
3221 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
3222 ioarcb->ioadl_bus_addr =
3223 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3224 offsetof(struct pmcraid_ioarcb,
3225 add_data.u.ioadl[3]));
3226 ioadl = &ioarcb->add_data.u.ioadl[3];
3227 } else {
3228 ioarcb->ioadl_bus_addr =
3229 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3230 offsetof(struct pmcraid_ioarcb,
3231 add_data.u.ioadl[ioadl_count]));
3232
3233 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3234 ioarcb->ioarcb_bus_addr |=
3235 DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
3236 }
3237
3238 return ioadl;
3239}
3240
3241/**
3242 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3243 * @pinstance: pointer to adapter instance structure
3244 * @cmd: pmcraid command struct
3245 *
3246 * This function is invoked by queuecommand entry point while sending a command
3247 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3248 *
3249 * Return value:
c20c4267 3250 * 0 on success or -1 on failure
89a36810
AR		 3251 */
3252static int pmcraid_build_ioadl(
3253 struct pmcraid_instance *pinstance,
3254 struct pmcraid_cmd *cmd
3255)
3256{
3257 int i, nseg;
3258 struct scatterlist *sglist;
3259
3260 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3261 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3262 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
3263
3264 u32 length = scsi_bufflen(scsi_cmd);
3265
3266 if (!length)
3267 return 0;
3268
3269 nseg = scsi_dma_map(scsi_cmd);
3270
3271 if (nseg < 0) {
34876402 3272 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
89a36810
AR		 3273 return -1;
3274 } else if (nseg > PMCRAID_MAX_IOADLS) {
3275 scsi_dma_unmap(scsi_cmd);
34876402 3276 scmd_printk(KERN_ERR, scsi_cmd,
89a36810
AR		 3277 "sg count is (%d) more than allowed!\n", nseg);
3278 return -1;
3279 }
3280
3281 /* Initialize IOARCB data transfer length fields */
3282 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3283 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3284
3285 ioarcb->request_flags0 |= NO_LINK_DESCS;
3286 ioarcb->data_transfer_length = cpu_to_le32(length);
3287 ioadl = pmcraid_init_ioadls(cmd, nseg);
3288
3289 /* Initialize IOADL descriptor addresses */
3290 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3291 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3292 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3293 ioadl[i].flags = 0;
3294 }
3295 /* setup last descriptor */
88197966 3296 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 3297
3298 return 0;
3299}
3300
3301/**
3302 * pmcraid_free_sglist - Frees an allocated SG buffer list
3303 * @sglist: scatter/gather list pointer
3304 *
3305 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3306 *
3307 * Return value:
c20c4267 3308 * none
89a36810
AR		 3309 */
3310static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3311{
3312 int i;
3313
3314 for (i = 0; i < sglist->num_sg; i++)
3315 __free_pages(sg_page(&(sglist->scatterlist[i])),
3316 sglist->order);
3317
3318 kfree(sglist);
3319}
3320
3321/**
3322 * pmcraid_alloc_sglist - Allocates memory for a SG list
3323 * @buflen: buffer length
3324 *
3325 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3326 * list.
3327 *
3328 * Return value
c20c4267 3329 * pointer to sglist / NULL on failure
89a36810
AR		 3330 */
3331static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3332{
3333 struct pmcraid_sglist *sglist;
3334 struct scatterlist *scatterlist;
3335 struct page *page;
3336 int num_elem, i, j;
3337 int sg_size;
3338 int order;
3339 int bsize_elem;
3340
3341 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3342 order = (sg_size > 0) ? get_order(sg_size) : 0;
3343 bsize_elem = PAGE_SIZE * (1 << order);
3344
3345 /* Determine the actual number of sg entries needed */
3346 if (buflen % bsize_elem)
3347 num_elem = (buflen / bsize_elem) + 1;
3348 else
3349 num_elem = buflen / bsize_elem;
3350
3351 /* Allocate a scatter/gather list for the DMA */
3352 sglist = kzalloc(sizeof(struct pmcraid_sglist) +
3353 (sizeof(struct scatterlist) * (num_elem - 1)),
3354 GFP_KERNEL);
3355
3356 if (sglist == NULL)
3357 return NULL;
3358
3359 scatterlist = sglist->scatterlist;
3360 sg_init_table(scatterlist, num_elem);
3361 sglist->order = order;
3362 sglist->num_sg = num_elem;
3363 sg_size = buflen;
3364
3365 for (i = 0; i < num_elem; i++) {
3366 page = alloc_pages(GFP_KERNEL|GFP_DMA, order);
3367 if (!page) {
3368 for (j = i - 1; j >= 0; j--)
3369 __free_pages(sg_page(&scatterlist[j]), order);
3370 kfree(sglist);
3371 return NULL;
3372 }
3373
3374 sg_set_page(&scatterlist[i], page,
3375 sg_size < bsize_elem ? sg_size : bsize_elem, 0);
3376 sg_size -= bsize_elem;
3377 }
3378
3379 return sglist;
3380}
3381
3382/**
3383 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3384 * @sglist: scatter/gather list pointer
3385 * @buffer: buffer pointer
3386 * @len: buffer length
3387 * @direction: data transfer direction
3388 *
3389 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3390 *
3391 * Return value:
3392 * 0 on success / other on failure
3393 */
3394static int pmcraid_copy_sglist(
3395 struct pmcraid_sglist *sglist,
3396 unsigned long buffer,
3397 u32 len,
3398 int direction
3399)
3400{
3401 struct scatterlist *scatterlist;
3402 void *kaddr;
3403 int bsize_elem;
3404 int i;
3405 int rc = 0;
3406
3407 /* Determine the actual number of bytes per element */
3408 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3409
3410 scatterlist = sglist->scatterlist;
3411
3412 for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3413 struct page *page = sg_page(&scatterlist[i]);
3414
3415 kaddr = kmap(page);
3416 if (direction == DMA_TO_DEVICE)
3417 rc = __copy_from_user(kaddr,
3418 (void *)buffer,
3419 bsize_elem);
3420 else
3421 rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
3422
3423 kunmap(page);
3424
3425 if (rc) {
3426 pmcraid_err("failed to copy user data into sg list\n");
3427 return -EFAULT;
3428 }
3429
3430 scatterlist[i].length = bsize_elem;
3431 }
3432
3433 if (len % bsize_elem) {
3434 struct page *page = sg_page(&scatterlist[i]);
3435
3436 kaddr = kmap(page);
3437
3438 if (direction == DMA_TO_DEVICE)
3439 rc = __copy_from_user(kaddr,
3440 (void *)buffer,
3441 len % bsize_elem);
3442 else
3443 rc = __copy_to_user((void *)buffer,
3444 kaddr,
3445 len % bsize_elem);
3446
3447 kunmap(page);
3448
3449 scatterlist[i].length = len % bsize_elem;
3450 }
3451
3452 if (rc) {
3453 pmcraid_err("failed to copy user data into sg list\n");
3454 rc = -EFAULT;
3455 }
3456
3457 return rc;
3458}
3459
3460/**
3461 * pmcraid_queuecommand - Queue a mid-layer request
3462 * @scsi_cmd: scsi command struct
3463 * @done: done function
3464 *
3465 * This function queues a request generated by the mid-layer. Midlayer calls
3466 * this routine within host->lock. Some of the functions called by queuecommand
3467 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3468 *
3469 * Return value:
3470 * 0 on success
3471 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3472 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3473 */
3474static int pmcraid_queuecommand(
3475 struct scsi_cmnd *scsi_cmd,
3476 void (*done) (struct scsi_cmnd *)
3477)
3478{
3479 struct pmcraid_instance *pinstance;
3480 struct pmcraid_resource_entry *res;
3481 struct pmcraid_ioarcb *ioarcb;
3482 struct pmcraid_cmd *cmd;
c20c4267 3483 u32 fw_version;
89a36810
AR		 3484 int rc = 0;
3485
3486 pinstance =
3487 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
c20c4267 3488 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
89a36810
AR		 3489 scsi_cmd->scsi_done = done;
3490 res = scsi_cmd->device->hostdata;
3491 scsi_cmd->result = (DID_OK << 16);
3492
3493 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3494 * the command
3495 */
3496 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3497 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3498 scsi_cmd->result = (DID_NO_CONNECT << 16);
3499 scsi_cmd->scsi_done(scsi_cmd);
3500 return 0;
3501 }
3502
3503 /* If IOA reset is in progress, can't queue the commands */
3504 if (pinstance->ioa_reset_in_progress)
3505 return SCSI_MLQUEUE_HOST_BUSY;
3506
c20c4267
AR		 3507 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3508 * the command here itself with success return
3509 */
3510 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3511 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3512 scsi_cmd->scsi_done(scsi_cmd);
3513 return 0;
3514 }
3515
89a36810
AR		 3516 /* initialize the command and IOARCB to be sent to IOA */
3517 cmd = pmcraid_get_free_cmd(pinstance);
3518
3519 if (cmd == NULL) {
3520 pmcraid_err("free command block is not available\n");
3521 return SCSI_MLQUEUE_HOST_BUSY;
3522 }
3523
3524 cmd->scsi_cmd = scsi_cmd;
3525 ioarcb = &(cmd->ioa_cb->ioarcb);
3526 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3527 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3528 ioarcb->request_type = REQ_TYPE_SCSI;
3529
c20c4267
AR		 3530 /* set hrrq number where the IOA should respond to. Note that all cmds
3531 * generated internally uses hrrq_id 0, exception to this is the cmd
3532 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3533 * hrrq_id assigned here in queuecommand
3534 */
3535 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3536 pinstance->num_hrrq;
89a36810
AR		 3537 cmd->cmd_done = pmcraid_io_done;
3538
3539 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3540 if (scsi_cmd->underflow == 0)
3541 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3542
3543 if (res->sync_reqd) {
3544 ioarcb->request_flags0 |= SYNC_COMPLETE;
3545 res->sync_reqd = 0;
3546 }
3547
3548 ioarcb->request_flags0 |= NO_LINK_DESCS;
3549 ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
3550
3551 if (RES_IS_GSCSI(res->cfg_entry))
3552 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3553 }
3554
3555 rc = pmcraid_build_ioadl(pinstance, cmd);
3556
3557 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3558 le32_to_cpu(ioarcb->response_handle) >> 2,
3559 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3560 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3561 PMCRAID_PHYS_BUS_ID,
3562 RES_IS_VSET(res->cfg_entry) ?
c20c4267
AR		 3563 (fw_version <= PMCRAID_FW_VERSION_1 ?
3564 res->cfg_entry.unique_flags1 :
3565 res->cfg_entry.array_id & 0xFF) :
89a36810
AR		 3566 RES_TARGET(res->cfg_entry.resource_address),
3567 RES_LUN(res->cfg_entry.resource_address));
3568
3569 if (likely(rc == 0)) {
3570 _pmcraid_fire_command(cmd);
3571 } else {
3572 pmcraid_err("queuecommand could not build ioadl\n");
3573 pmcraid_return_cmd(cmd);
3574 rc = SCSI_MLQUEUE_HOST_BUSY;
3575 }
3576
3577 return rc;
3578}
3579
3580/**
3581 * pmcraid_open -char node "open" entry, allowed only users with admin access
3582 */
3583static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3584{
3585 struct pmcraid_instance *pinstance;
3586
3587 if (!capable(CAP_SYS_ADMIN))
3588 return -EACCES;
3589
3590 /* Populate adapter instance * pointer for use by ioctl */
3591 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3592 filep->private_data = pinstance;
3593
3594 return 0;
3595}
3596
3597/**
3598 * pmcraid_release - char node "release" entry point
3599 */
3600static int pmcraid_chr_release(struct inode *inode, struct file *filep)
3601{
660bdddb 3602 struct pmcraid_instance *pinstance = filep->private_data;
89a36810
AR		 3603
3604 filep->private_data = NULL;
3605 fasync_helper(-1, filep, 0, &pinstance->aen_queue);
3606
3607 return 0;
3608}
3609
3610/**
3611 * pmcraid_fasync - Async notifier registration from applications
3612 *
3613 * This function adds the calling process to a driver global queue. When an
3614 * event occurs, SIGIO will be sent to all processes in this queue.
3615 */
3616static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3617{
3618 struct pmcraid_instance *pinstance;
3619 int rc;
3620
660bdddb 3621 pinstance = filep->private_data;
89a36810
AR		 3622 mutex_lock(&pinstance->aen_queue_lock);
3623 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3624 mutex_unlock(&pinstance->aen_queue_lock);
3625
3626 return rc;
3627}
3628
3629
3630/**
3631 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3632 * commands sent over IOCTL interface
3633 *
3634 * @cmd : pointer to struct pmcraid_cmd
3635 * @buflen : length of the request buffer
3636 * @direction : data transfer direction
3637 *
3638 * Return value
af901ca1 3639 * 0 on success, non-zero error code on failure
89a36810
AR		 3640 */
3641static int pmcraid_build_passthrough_ioadls(
3642 struct pmcraid_cmd *cmd,
3643 int buflen,
3644 int direction
3645)
3646{
3647 struct pmcraid_sglist *sglist = NULL;
3648 struct scatterlist *sg = NULL;
3649 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3650 struct pmcraid_ioadl_desc *ioadl;
3651 int i;
3652
3653 sglist = pmcraid_alloc_sglist(buflen);
3654
3655 if (!sglist) {
3656 pmcraid_err("can't allocate memory for passthrough SGls\n");
3657 return -ENOMEM;
3658 }
3659
3660 sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
3661 sglist->scatterlist,
3662 sglist->num_sg, direction);
3663
3664 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3665 dev_err(&cmd->drv_inst->pdev->dev,
3666 "Failed to map passthrough buffer!\n");
3667 pmcraid_free_sglist(sglist);
3668 return -EIO;
3669 }
3670
3671 cmd->sglist = sglist;
3672 ioarcb->request_flags0 |= NO_LINK_DESCS;
3673
3674 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3675
3676 /* Initialize IOADL descriptor addresses */
3677 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3678 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3679 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3680 ioadl[i].flags = 0;
3681 }
3682
3683 /* setup the last descriptor */
88197966 3684 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 3685
3686 return 0;
3687}
3688
3689
3690/**
3691 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3692 *
3693 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3694 * @buflen: size of the request buffer
3695 * @direction: data transfer direction
3696 *
3697 * Return value
af901ca1 3698 * 0 on success, non-zero error code on failure
89a36810
AR		 3699 */
3700static void pmcraid_release_passthrough_ioadls(
3701 struct pmcraid_cmd *cmd,
3702 int buflen,
3703 int direction
3704)
3705{
3706 struct pmcraid_sglist *sglist = cmd->sglist;
3707
3708 if (buflen > 0) {
3709 pci_unmap_sg(cmd->drv_inst->pdev,
3710 sglist->scatterlist,
3711 sglist->num_sg,
3712 direction);
3713 pmcraid_free_sglist(sglist);
3714 cmd->sglist = NULL;
3715 }
3716}
3717
3718/**
3719 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3720 *
3721 * @pinstance: pointer to adapter instance structure
3722 * @cmd: ioctl code
3723 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3724 *
3725 * Return value
af901ca1 3726 * 0 on success, non-zero error code on failure
89a36810
AR		 3727 */
3728static long pmcraid_ioctl_passthrough(
3729 struct pmcraid_instance *pinstance,
3730 unsigned int ioctl_cmd,
3731 unsigned int buflen,
3732 unsigned long arg
3733)
3734{
3735 struct pmcraid_passthrough_ioctl_buffer *buffer;
3736 struct pmcraid_ioarcb *ioarcb;
3737 struct pmcraid_cmd *cmd;
3738 struct pmcraid_cmd *cancel_cmd;
3739 unsigned long request_buffer;
3740 unsigned long request_offset;
3741 unsigned long lock_flags;
c20c4267 3742 u32 ioasc;
89a36810
AR		 3743 int request_size;
3744 int buffer_size;
3745 u8 access, direction;
3746 int rc = 0;
3747
3748 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3749 if (pinstance->ioa_reset_in_progress) {
3750 rc = wait_event_interruptible_timeout(
3751 pinstance->reset_wait_q,
3752 !pinstance->ioa_reset_in_progress,
3753 msecs_to_jiffies(10000));
3754
3755 if (!rc)
3756 return -ETIMEDOUT;
3757 else if (rc < 0)
3758 return -ERESTARTSYS;
3759 }
3760
3761 /* If adapter is not in operational state, return error */
3762 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3763 pmcraid_err("IOA is not operational\n");
3764 return -ENOTTY;
3765 }
3766
3767 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3768 buffer = kmalloc(buffer_size, GFP_KERNEL);
3769
3770 if (!buffer) {
3771 pmcraid_err("no memory for passthrough buffer\n");
3772 return -ENOMEM;
3773 }
3774
3775 request_offset =
3776 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3777
3778 request_buffer = arg + request_offset;
3779
3780 rc = __copy_from_user(buffer,
3781 (struct pmcraid_passthrough_ioctl_buffer *) arg,
3782 sizeof(struct pmcraid_passthrough_ioctl_buffer));
3783 if (rc) {
3784 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3785 rc = -EFAULT;
3786 goto out_free_buffer;
3787 }
3788
3789 request_size = buffer->ioarcb.data_transfer_length;
3790
3791 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3792 access = VERIFY_READ;
3793 direction = DMA_TO_DEVICE;
3794 } else {
3795 access = VERIFY_WRITE;
3796 direction = DMA_FROM_DEVICE;
3797 }
3798
3799 if (request_size > 0) {
3800 rc = access_ok(access, arg, request_offset + request_size);
3801
3802 if (!rc) {
3803 rc = -EFAULT;
3804 goto out_free_buffer;
3805 }
3806 }
3807
3808 /* check if we have any additional command parameters */
3809 if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
3810 rc = -EINVAL;
3811 goto out_free_buffer;
3812 }
3813
3814 cmd = pmcraid_get_free_cmd(pinstance);
3815
3816 if (!cmd) {
3817 pmcraid_err("free command block is not available\n");
3818 rc = -ENOMEM;
3819 goto out_free_buffer;
3820 }
3821
3822 cmd->scsi_cmd = NULL;
3823 ioarcb = &(cmd->ioa_cb->ioarcb);
3824
3825 /* Copy the user-provided IOARCB stuff field by field */
3826 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3827 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3828 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3829 ioarcb->request_type = buffer->ioarcb.request_type;
3830 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3831 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3832 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3833
3834 if (buffer->ioarcb.add_cmd_param_length) {
3835 ioarcb->add_cmd_param_length =
3836 buffer->ioarcb.add_cmd_param_length;
3837 ioarcb->add_cmd_param_offset =
3838 buffer->ioarcb.add_cmd_param_offset;
3839 memcpy(ioarcb->add_data.u.add_cmd_params,
3840 buffer->ioarcb.add_data.u.add_cmd_params,
3841 buffer->ioarcb.add_cmd_param_length);
3842 }
3843
c20c4267
AR		 3844 /* set hrrq number where the IOA should respond to. Note that all cmds
3845 * generated internally uses hrrq_id 0, exception to this is the cmd
3846 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3847 * hrrq_id assigned here in queuecommand
3848 */
3849 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3850 pinstance->num_hrrq;
3851
89a36810
AR		 3852 if (request_size) {
3853 rc = pmcraid_build_passthrough_ioadls(cmd,
3854 request_size,
3855 direction);
3856 if (rc) {
3857 pmcraid_err("couldn't build passthrough ioadls\n");
3858 goto out_free_buffer;
3859 }
3860 }
3861
3862 /* If data is being written into the device, copy the data from user
3863 * buffers
3864 */
3865 if (direction == DMA_TO_DEVICE && request_size > 0) {
3866 rc = pmcraid_copy_sglist(cmd->sglist,
3867 request_buffer,
3868 request_size,
3869 direction);
3870 if (rc) {
3871 pmcraid_err("failed to copy user buffer\n");
3872 goto out_free_sglist;
3873 }
3874 }
3875
3876 /* passthrough ioctl is a blocking command so, put the user to sleep
3877 * until timeout. Note that a timeout value of 0 means, do timeout.
3878 */
3879 cmd->cmd_done = pmcraid_internal_done;
3880 init_completion(&cmd->wait_for_completion);
3881 cmd->completion_req = 1;
3882
3883 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3884 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3885 cmd->ioa_cb->ioarcb.cdb[0],
3886 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3887
3888 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3889 _pmcraid_fire_command(cmd);
3890 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3891
c20c4267
AR		 3892 /* NOTE ! Remove the below line once abort_task is implemented
3893 * in firmware. This line disables ioctl command timeout handling logic
3894 * similar to IO command timeout handling, making ioctl commands to wait
3895 * until the command completion regardless of timeout value specified in
3896 * ioarcb
3897 */
3898 buffer->ioarcb.cmd_timeout = 0;
3899
89a36810
AR		 3900 /* If command timeout is specified put caller to wait till that time,
3901 * otherwise it would be blocking wait. If command gets timed out, it
3902 * will be aborted.
3903 */
3904 if (buffer->ioarcb.cmd_timeout == 0) {
3905 wait_for_completion(&cmd->wait_for_completion);
3906 } else if (!wait_for_completion_timeout(
3907 &cmd->wait_for_completion,
3908 msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
3909
3910 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3911 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
3912 cmd->ioa_cb->ioarcb.cdb[0]);
3913
89a36810
AR		 3914 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3915 cancel_cmd = pmcraid_abort_cmd(cmd);
3916 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3917
3918 if (cancel_cmd) {
3919 wait_for_completion(&cancel_cmd->wait_for_completion);
c20c4267 3920 ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
89a36810 3921 pmcraid_return_cmd(cancel_cmd);
c20c4267
AR		 3922
3923 /* if abort task couldn't find the command i.e it got
3924 * completed prior to aborting, return good completion.
3925 * if command got aborted succesfully or there was IOA
3926 * reset due to abort task itself getting timedout then
3927 * return -ETIMEDOUT
3928 */
3929 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3930 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3931 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3932 rc = -ETIMEDOUT;
3933 goto out_handle_response;
3934 }
89a36810
AR		 3935 }
3936
c20c4267
AR		 3937 /* no command block for abort task or abort task failed to abort
3938 * the IOARCB, then wait for 150 more seconds and initiate reset
3939 * sequence after timeout
3940 */
3941 if (!wait_for_completion_timeout(
3942 &cmd->wait_for_completion,
3943 msecs_to_jiffies(150 * 1000))) {
3944 pmcraid_reset_bringup(cmd->drv_inst);
3945 rc = -ETIMEDOUT;
3946 }
89a36810
AR		 3947 }
3948
c20c4267 3949out_handle_response:
89a36810
AR		 3950 /* If the command failed for any reason, copy entire IOASA buffer and
3951 * return IOCTL success. If copying IOASA to user-buffer fails, return
3952 * EFAULT
3953 */
c20c4267 3954 if (PMCRAID_IOASC_SENSE_KEY(le32_to_cpu(cmd->ioa_cb->ioasa.ioasc))) {
89a36810
AR		 3955 void *ioasa =
3956 (void *)(arg +
3957 offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
3958
3959 pmcraid_info("command failed with %x\n",
3960 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
3961 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3962 sizeof(struct pmcraid_ioasa))) {
3963 pmcraid_err("failed to copy ioasa buffer to user\n");
3964 rc = -EFAULT;
3965 }
3966 }
c20c4267 3967
89a36810
AR		 3968 /* If the data transfer was from device, copy the data onto user
3969 * buffers
3970 */
3971 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3972 rc = pmcraid_copy_sglist(cmd->sglist,
3973 request_buffer,
3974 request_size,
3975 direction);
3976 if (rc) {
3977 pmcraid_err("failed to copy user buffer\n");
3978 rc = -EFAULT;
3979 }
3980 }
3981
3982out_free_sglist:
3983 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3984 pmcraid_return_cmd(cmd);
3985
3986out_free_buffer:
3987 kfree(buffer);
3988
3989 return rc;
3990}
3991
3992
3993
3994
3995/**
3996 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3997 *
3998 * @pinstance: pointer to adapter instance structure
3999 * @cmd: ioctl command passed in
4000 * @buflen: length of user_buffer
4001 * @user_buffer: user buffer pointer
4002 *
4003 * Return Value
4004 * 0 in case of success, otherwise appropriate error code
4005 */
4006static long pmcraid_ioctl_driver(
4007 struct pmcraid_instance *pinstance,
4008 unsigned int cmd,
4009 unsigned int buflen,
4010 void __user *user_buffer
4011)
4012{
4013 int rc = -ENOSYS;
4014
4015 if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
c20c4267 4016 pmcraid_err("ioctl_driver: access fault in request buffer\n");
89a36810
AR		 4017 return -EFAULT;
4018 }
4019
4020 switch (cmd) {
4021 case PMCRAID_IOCTL_RESET_ADAPTER:
4022 pmcraid_reset_bringup(pinstance);
4023 rc = 0;
4024 break;
4025
4026 default:
4027 break;
4028 }
4029
4030 return rc;
4031}
4032
4033/**
4034 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4035 *
4036 * @cmd: ioctl command
4037 * @arg: user buffer
4038 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4039 *
4040 * Return Value
4041 * negetive error code if there are access issues, otherwise zero.
4042 * Upon success, returns ioctl header copied out of user buffer.
4043 */
4044
4045static int pmcraid_check_ioctl_buffer(
4046 int cmd,
4047 void __user *arg,
4048 struct pmcraid_ioctl_header *hdr
4049)
4050{
4051 int rc = 0;
4052 int access = VERIFY_READ;
4053
4054 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
4055 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4056 return -EFAULT;
4057 }
4058
4059 /* check for valid driver signature */
4060 rc = memcmp(hdr->signature,
4061 PMCRAID_IOCTL_SIGNATURE,
4062 sizeof(hdr->signature));
4063 if (rc) {
4064 pmcraid_err("signature verification failed\n");
4065 return -EINVAL;
4066 }
4067
89a36810
AR		 4068 /* check for appropriate buffer access */
4069 if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
4070 access = VERIFY_WRITE;
4071
4072 rc = access_ok(access,
4073 (arg + sizeof(struct pmcraid_ioctl_header)),
4074 hdr->buffer_length);
4075 if (!rc) {
4076 pmcraid_err("access failed for user buffer of size %d\n",
4077 hdr->buffer_length);
4078 return -EFAULT;
4079 }
4080
4081 return 0;
4082}
4083
4084/**
4085 * pmcraid_ioctl - char node ioctl entry point
4086 */
4087static long pmcraid_chr_ioctl(
4088 struct file *filep,
4089 unsigned int cmd,
4090 unsigned long arg
4091)
4092{
4093 struct pmcraid_instance *pinstance = NULL;
4094 struct pmcraid_ioctl_header *hdr = NULL;
4095 int retval = -ENOTTY;
4096
4097 hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header));
4098
4099 if (!hdr) {
4100 pmcraid_err("faile to allocate memory for ioctl header\n");
4101 return -ENOMEM;
4102 }
4103
4104 retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
4105
4106 if (retval) {
4107 pmcraid_info("chr_ioctl: header check failed\n");
4108 kfree(hdr);
4109 return retval;
4110 }
4111
660bdddb 4112 pinstance = filep->private_data;
89a36810
AR		 4113
4114 if (!pinstance) {
4115 pmcraid_info("adapter instance is not found\n");
4116 kfree(hdr);
4117 return -ENOTTY;
4118 }
4119
4120 switch (_IOC_TYPE(cmd)) {
4121
4122 case PMCRAID_PASSTHROUGH_IOCTL:
4123 /* If ioctl code is to download microcode, we need to block
4124 * mid-layer requests.
4125 */
4126 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4127 scsi_block_requests(pinstance->host);
4128
4129 retval = pmcraid_ioctl_passthrough(pinstance,
4130 cmd,
4131 hdr->buffer_length,
4132 arg);
4133
4134 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4135 scsi_unblock_requests(pinstance->host);
4136 break;
4137
4138 case PMCRAID_DRIVER_IOCTL:
4139 arg += sizeof(struct pmcraid_ioctl_header);
4140 retval = pmcraid_ioctl_driver(pinstance,
4141 cmd,
4142 hdr->buffer_length,
4143 (void __user *)arg);
4144 break;
4145
4146 default:
4147 retval = -ENOTTY;
4148 break;
4149 }
4150
4151 kfree(hdr);
4152
4153 return retval;
4154}
4155
4156/**
4157 * File operations structure for management interface
4158 */
4159static const struct file_operations pmcraid_fops = {
4160 .owner = THIS_MODULE,
4161 .open = pmcraid_chr_open,
4162 .release = pmcraid_chr_release,
4163 .fasync = pmcraid_chr_fasync,
4164 .unlocked_ioctl = pmcraid_chr_ioctl,
4165#ifdef CONFIG_COMPAT
4166 .compat_ioctl = pmcraid_chr_ioctl,
4167#endif
6038f373 4168 .llseek = noop_llseek,
89a36810
AR		 4169};
4170
4171
4172
4173
4174/**
4175 * pmcraid_show_log_level - Display adapter's error logging level
4176 * @dev: class device struct
4177 * @buf: buffer
4178 *
4179 * Return value:
4180 * number of bytes printed to buffer
4181 */
4182static ssize_t pmcraid_show_log_level(
4183 struct device *dev,
4184 struct device_attribute *attr,
4185 char *buf)
4186{
4187 struct Scsi_Host *shost = class_to_shost(dev);
4188 struct pmcraid_instance *pinstance =
4189 (struct pmcraid_instance *)shost->hostdata;
4190 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
4191}
4192
4193/**
4194 * pmcraid_store_log_level - Change the adapter's error logging level
4195 * @dev: class device struct
4196 * @buf: buffer
4197 * @count: not used
4198 *
4199 * Return value:
4200 * number of bytes printed to buffer
4201 */
4202static ssize_t pmcraid_store_log_level(
4203 struct device *dev,
4204 struct device_attribute *attr,
4205 const char *buf,
4206 size_t count
4207)
4208{
4209 struct Scsi_Host *shost;
4210 struct pmcraid_instance *pinstance;
4211 unsigned long val;
4212
4213 if (strict_strtoul(buf, 10, &val))
4214 return -EINVAL;
4215 /* log-level should be from 0 to 2 */
4216 if (val > 2)
4217 return -EINVAL;
4218
4219 shost = class_to_shost(dev);
4220 pinstance = (struct pmcraid_instance *)shost->hostdata;
4221 pinstance->current_log_level = val;
4222
4223 return strlen(buf);
4224}
4225
4226static struct device_attribute pmcraid_log_level_attr = {
4227 .attr = {
4228 .name = "log_level",
4229 .mode = S_IRUGO | S_IWUSR,
4230 },
4231 .show = pmcraid_show_log_level,
4232 .store = pmcraid_store_log_level,
4233};
4234
4235/**
4236 * pmcraid_show_drv_version - Display driver version
4237 * @dev: class device struct
4238 * @buf: buffer
4239 *
4240 * Return value:
4241 * number of bytes printed to buffer
4242 */
4243static ssize_t pmcraid_show_drv_version(
4244 struct device *dev,
4245 struct device_attribute *attr,
4246 char *buf
4247)
4248{
4249 return snprintf(buf, PAGE_SIZE, "version: %s, build date: %s\n",
4250 PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
4251}
4252
4253static struct device_attribute pmcraid_driver_version_attr = {
4254 .attr = {
4255 .name = "drv_version",
4256 .mode = S_IRUGO,
4257 },
4258 .show = pmcraid_show_drv_version,
4259};
4260
4261/**
4262 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4263 * @dev: class device struct
4264 * @buf: buffer
4265 *
4266 * Return value:
4267 * number of bytes printed to buffer
4268 */
4269static ssize_t pmcraid_show_adapter_id(
4270 struct device *dev,
4271 struct device_attribute *attr,
4272 char *buf
4273)
4274{
4275 struct Scsi_Host *shost = class_to_shost(dev);
4276 struct pmcraid_instance *pinstance =
4277 (struct pmcraid_instance *)shost->hostdata;
4278 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4279 pinstance->pdev->devfn;
4280 u32 aen_group = pmcraid_event_family.id;
4281
4282 return snprintf(buf, PAGE_SIZE,
4283 "adapter id: %d\nminor: %d\naen group: %d\n",
4284 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4285}
4286
4287static struct device_attribute pmcraid_adapter_id_attr = {
4288 .attr = {
4289 .name = "adapter_id",
4290 .mode = S_IRUGO | S_IWUSR,
4291 },
4292 .show = pmcraid_show_adapter_id,
4293};
4294
4295static struct device_attribute *pmcraid_host_attrs[] = {
4296 &pmcraid_log_level_attr,
4297 &pmcraid_driver_version_attr,
4298 &pmcraid_adapter_id_attr,
4299 NULL,
4300};
4301
4302
4303/* host template structure for pmcraid driver */
4304static struct scsi_host_template pmcraid_host_template = {
4305 .module = THIS_MODULE,
4306 .name = PMCRAID_DRIVER_NAME,
4307 .queuecommand = pmcraid_queuecommand,
4308 .eh_abort_handler = pmcraid_eh_abort_handler,
4309 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4310 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4311 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4312 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4313
4314 .slave_alloc = pmcraid_slave_alloc,
4315 .slave_configure = pmcraid_slave_configure,
4316 .slave_destroy = pmcraid_slave_destroy,
4317 .change_queue_depth = pmcraid_change_queue_depth,
4318 .change_queue_type = pmcraid_change_queue_type,
4319 .can_queue = PMCRAID_MAX_IO_CMD,
4320 .this_id = -1,
4321 .sg_tablesize = PMCRAID_MAX_IOADLS,
4322 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4323 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4324 .use_clustering = ENABLE_CLUSTERING,
4325 .shost_attrs = pmcraid_host_attrs,
4326 .proc_name = PMCRAID_DRIVER_NAME
4327};
4328
c20c4267
AR		 4329/*
4330 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4331 * @irq: interrupt vector number
4332 * @dev_id: pointer hrrq_vector
89a36810
AR		 4333 *
4334 * Return Value
c20c4267 4335 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
89a36810 4336 */
c20c4267
AR		 4337
4338static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
89a36810 4339{
c20c4267
AR		 4340 struct pmcraid_isr_param *hrrq_vector;
4341 struct pmcraid_instance *pinstance;
4342 unsigned long lock_flags;
4343 u32 intrs_val;
4344 int hrrq_id;
4345
4346 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4347 hrrq_id = hrrq_vector->hrrq_id;
4348 pinstance = hrrq_vector->drv_inst;
4349
4350 if (!hrrq_id) {
4351 /* Read the interrupt */
4352 intrs_val = pmcraid_read_interrupts(pinstance);
4353 if (intrs_val &&
4354 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4355 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4356 /* Any error interrupts including unit_check,
4357 * initiate IOA reset.In case of unit check indicate
4358 * to reset_sequence that IOA unit checked and prepare
4359 * for a dump during reset sequence
4360 */
4361 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4362 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4363 pinstance->ioa_unit_check = 1;
4364
4365 pmcraid_err("ISR: error interrupts: %x \
4366 initiating reset\n", intrs_val);
4367 spin_lock_irqsave(pinstance->host->host_lock,
4368 lock_flags);
4369 pmcraid_initiate_reset(pinstance);
4370 spin_unlock_irqrestore(
4371 pinstance->host->host_lock,
4372 lock_flags);
4373 }
4374 /* If interrupt was as part of the ioa initialization,
4375 * clear it. Delete the timer and wakeup the
4376 * reset engine to proceed with reset sequence
4377 */
4378 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4379 pmcraid_clr_trans_op(pinstance);
4380
4381 /* Clear the interrupt register by writing
4382 * to host to ioa doorbell. Once done
4383 * FW will clear the interrupt.
4384 */
4385 iowrite32(DOORBELL_INTR_MSIX_CLR,
4386 pinstance->int_regs.host_ioa_interrupt_reg);
4387 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4388
89a36810 4389
c20c4267
AR		 4390 }
4391 }
4392
4393 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4394
4395 return IRQ_HANDLED;
89a36810
AR		 4396}
4397
4398/**
c20c4267 4399 * pmcraid_isr - implements legacy interrupt handling routine
89a36810
AR		 4400 *
4401 * @irq: interrupt vector number
4402 * @dev_id: pointer hrrq_vector
4403 *
4404 * Return Value
4405 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4406 */
4407static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4408{
4409 struct pmcraid_isr_param *hrrq_vector;
4410 struct pmcraid_instance *pinstance;
89a36810 4411 u32 intrs;
c20c4267
AR		 4412 unsigned long lock_flags;
4413 int hrrq_id = 0;
89a36810
AR		 4414
4415 /* In case of legacy interrupt mode where interrupts are shared across
4416 * isrs, it may be possible that the current interrupt is not from IOA
4417 */
4418 if (!dev_id) {
4419 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4420 return IRQ_NONE;
4421 }
89a36810
AR		 4422 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4423 pinstance = hrrq_vector->drv_inst;
4424
89a36810
AR		 4425 intrs = pmcraid_read_interrupts(pinstance);
4426
c20c4267 4427 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
89a36810 4428 return IRQ_NONE;
89a36810
AR		 4429
4430 /* Any error interrupts including unit_check, initiate IOA reset.
4431 * In case of unit check indicate to reset_sequence that IOA unit
4432 * checked and prepare for a dump during reset sequence
4433 */
4434 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4435
4436 if (intrs & INTRS_IOA_UNIT_CHECK)
4437 pinstance->ioa_unit_check = 1;
4438
4439 iowrite32(intrs,
4440 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4441 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4442 intrs);
c20c4267
AR		 4443 intrs = ioread32(
4444 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4445 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
89a36810 4446 pmcraid_initiate_reset(pinstance);
c20c4267 4447 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
89a36810 4448 } else {
c20c4267
AR		 4449 /* If interrupt was as part of the ioa initialization,
4450 * clear. Delete the timer and wakeup the
4451 * reset engine to proceed with reset sequence
4452 */
4453 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4454 pmcraid_clr_trans_op(pinstance);
4455 } else {
4456 iowrite32(intrs,
4457 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4458 ioread32(
4459 pinstance->int_regs.ioa_host_interrupt_clr_reg);
89a36810 4460
c20c4267
AR		 4461 tasklet_schedule(
4462 &(pinstance->isr_tasklet[hrrq_id]));
4463 }
4464 }
89a36810
AR		 4465
4466 return IRQ_HANDLED;
4467}
4468
4469
4470/**
4471 * pmcraid_worker_function - worker thread function
4472 *
4473 * @workp: pointer to struct work queue
4474 *
4475 * Return Value
4476 * None
4477 */
4478
4479static void pmcraid_worker_function(struct work_struct *workp)
4480{
4481 struct pmcraid_instance *pinstance;
4482 struct pmcraid_resource_entry *res;
4483 struct pmcraid_resource_entry *temp;
4484 struct scsi_device *sdev;
4485 unsigned long lock_flags;
4486 unsigned long host_lock_flags;
c20c4267 4487 u16 fw_version;
89a36810
AR		 4488 u8 bus, target, lun;
4489
4490 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4491 /* add resources only after host is added into system */
4492 if (!atomic_read(&pinstance->expose_resources))
4493 return;
4494
c20c4267
AR		 4495 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4496
89a36810
AR		 4497 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4498 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4499
4500 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4501 sdev = res->scsi_dev;
4502
4503 /* host_lock must be held before calling
4504 * scsi_device_get
4505 */
4506 spin_lock_irqsave(pinstance->host->host_lock,
4507 host_lock_flags);
4508 if (!scsi_device_get(sdev)) {
4509 spin_unlock_irqrestore(
4510 pinstance->host->host_lock,
4511 host_lock_flags);
4512 pmcraid_info("deleting %x from midlayer\n",
4513 res->cfg_entry.resource_address);
4514 list_move_tail(&res->queue,
4515 &pinstance->free_res_q);
4516 spin_unlock_irqrestore(
4517 &pinstance->resource_lock,
4518 lock_flags);
4519 scsi_remove_device(sdev);
4520 scsi_device_put(sdev);
4521 spin_lock_irqsave(&pinstance->resource_lock,
4522 lock_flags);
4523 res->change_detected = 0;
4524 } else {
4525 spin_unlock_irqrestore(
4526 pinstance->host->host_lock,
4527 host_lock_flags);
4528 }
4529 }
4530 }
4531
4532 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4533
4534 if (res->change_detected == RES_CHANGE_ADD) {
4535
c20c4267
AR		 4536 if (!pmcraid_expose_resource(fw_version,
4537 &res->cfg_entry))
89a36810
AR		 4538 continue;
4539
4540 if (RES_IS_VSET(res->cfg_entry)) {
4541 bus = PMCRAID_VSET_BUS_ID;
c20c4267
AR		 4542 if (fw_version <= PMCRAID_FW_VERSION_1)
4543 target = res->cfg_entry.unique_flags1;
4544 else
4545 target = res->cfg_entry.array_id & 0xFF;
89a36810
AR		 4546 lun = PMCRAID_VSET_LUN_ID;
4547 } else {
4548 bus = PMCRAID_PHYS_BUS_ID;
4549 target =
4550 RES_TARGET(
4551 res->cfg_entry.resource_address);
4552 lun = RES_LUN(res->cfg_entry.resource_address);
4553 }
4554
4555 res->change_detected = 0;
4556 spin_unlock_irqrestore(&pinstance->resource_lock,
4557 lock_flags);
4558 scsi_add_device(pinstance->host, bus, target, lun);
4559 spin_lock_irqsave(&pinstance->resource_lock,
4560 lock_flags);
4561 }
4562 }
4563
4564 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4565}
4566
4567/**
4568 * pmcraid_tasklet_function - Tasklet function
4569 *
4570 * @instance: pointer to msix param structure
4571 *
4572 * Return Value
4573 * None
4574 */
c20c4267 4575static void pmcraid_tasklet_function(unsigned long instance)
89a36810
AR		 4576{
4577 struct pmcraid_isr_param *hrrq_vector;
4578 struct pmcraid_instance *pinstance;
4579 unsigned long hrrq_lock_flags;
4580 unsigned long pending_lock_flags;
4581 unsigned long host_lock_flags;
4582 spinlock_t *lockp; /* hrrq buffer lock */
4583 int id;
89a36810
AR		 4584 __le32 resp;
4585
4586 hrrq_vector = (struct pmcraid_isr_param *)instance;
4587 pinstance = hrrq_vector->drv_inst;
4588 id = hrrq_vector->hrrq_id;
4589 lockp = &(pinstance->hrrq_lock[id]);
89a36810
AR		 4590
4591 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4592 * protected by its own lock. Traversals must be done within this lock
4593 * as there may be multiple tasklets running on multiple CPUs. Note
4594 * that the lock is held just for picking up the response handle and
4595 * manipulating hrrq_curr/toggle_bit values.
4596 */
4597 spin_lock_irqsave(lockp, hrrq_lock_flags);
4598
4599 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4600
4601 while ((resp & HRRQ_TOGGLE_BIT) ==
4602 pinstance->host_toggle_bit[id]) {
4603
4604 int cmd_index = resp >> 2;
4605 struct pmcraid_cmd *cmd = NULL;
4606
89a36810
AR		 4607 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4608 pinstance->hrrq_curr[id]++;
4609 } else {
4610 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4611 pinstance->host_toggle_bit[id] ^= 1u;
4612 }
4613
c20c4267
AR		 4614 if (cmd_index >= PMCRAID_MAX_CMD) {
4615 /* In case of invalid response handle, log message */
4616 pmcraid_err("Invalid response handle %d\n", cmd_index);
4617 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4618 continue;
4619 }
4620
4621 cmd = pinstance->cmd_list[cmd_index];
89a36810
AR		 4622 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4623
4624 spin_lock_irqsave(&pinstance->pending_pool_lock,
4625 pending_lock_flags);
4626 list_del(&cmd->free_list);
4627 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4628 pending_lock_flags);
4629 del_timer(&cmd->timer);
4630 atomic_dec(&pinstance->outstanding_cmds);
4631
4632 if (cmd->cmd_done == pmcraid_ioa_reset) {
4633 spin_lock_irqsave(pinstance->host->host_lock,
4634 host_lock_flags);
4635 cmd->cmd_done(cmd);
4636 spin_unlock_irqrestore(pinstance->host->host_lock,
4637 host_lock_flags);
4638 } else if (cmd->cmd_done != NULL) {
4639 cmd->cmd_done(cmd);
4640 }
4641 /* loop over until we are done with all responses */
4642 spin_lock_irqsave(lockp, hrrq_lock_flags);
4643 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4644 }
4645
4646 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4647}
4648
4649/**
4650 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4651 * @pinstance: pointer to adapter instance structure
4652 *
4653 * This routine un-registers registered interrupt handler and
4654 * also frees irqs/vectors.
4655 *
4656 * Retun Value
4657 * None
4658 */
4659static
4660void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4661{
c20c4267
AR		 4662 int i;
4663
4664 for (i = 0; i < pinstance->num_hrrq; i++)
4665 free_irq(pinstance->hrrq_vector[i].vector,
4666 &(pinstance->hrrq_vector[i]));
4667
4668 if (pinstance->interrupt_mode) {
4669 pci_disable_msix(pinstance->pdev);
4670 pinstance->interrupt_mode = 0;
4671 }
89a36810
AR		 4672}
4673
4674/**
4675 * pmcraid_register_interrupt_handler - registers interrupt handler
4676 * @pinstance: pointer to per-adapter instance structure
4677 *
4678 * Return Value
4679 * 0 on success, non-zero error code otherwise.
4680 */
4681static int
4682pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4683{
c20c4267 4684 int rc;
89a36810
AR		 4685 struct pci_dev *pdev = pinstance->pdev;
4686
c20c4267
AR		 4687 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
4688 int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
4689 struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
4690 int i;
4691 for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
4692 entries[i].entry = i;
4693
4694 rc = pci_enable_msix(pdev, entries, num_hrrq);
4695 if (rc < 0)
4696 goto pmcraid_isr_legacy;
4697
4698 /* Check how many MSIX vectors are allocated and register
4699 * msi-x handlers for each of them giving appropriate buffer
4700 */
4701 if (rc > 0) {
4702 num_hrrq = rc;
4703 if (pci_enable_msix(pdev, entries, num_hrrq))
4704 goto pmcraid_isr_legacy;
4705 }
4706
4707 for (i = 0; i < num_hrrq; i++) {
4708 pinstance->hrrq_vector[i].hrrq_id = i;
4709 pinstance->hrrq_vector[i].drv_inst = pinstance;
4710 pinstance->hrrq_vector[i].vector = entries[i].vector;
4711 rc = request_irq(pinstance->hrrq_vector[i].vector,
4712 pmcraid_isr_msix, 0,
4713 PMCRAID_DRIVER_NAME,
4714 &(pinstance->hrrq_vector[i]));
4715
4716 if (rc) {
4717 int j;
4718 for (j = 0; j < i; j++)
4719 free_irq(entries[j].vector,
4720 &(pinstance->hrrq_vector[j]));
4721 pci_disable_msix(pdev);
4722 goto pmcraid_isr_legacy;
4723 }
4724 }
4725
4726 pinstance->num_hrrq = num_hrrq;
4727 pinstance->interrupt_mode = 1;
4728 iowrite32(DOORBELL_INTR_MODE_MSIX,
4729 pinstance->int_regs.host_ioa_interrupt_reg);
4730 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4731 goto pmcraid_isr_out;
4732 }
4733
4734pmcraid_isr_legacy:
4735 /* If MSI-X registration failed fallback to legacy mode, where
4736 * only one hrrq entry will be used
4737 */
89a36810
AR		 4738 pinstance->hrrq_vector[0].hrrq_id = 0;
4739 pinstance->hrrq_vector[0].drv_inst = pinstance;
c20c4267 4740 pinstance->hrrq_vector[0].vector = pdev->irq;
89a36810 4741 pinstance->num_hrrq = 1;
c20c4267
AR		 4742 rc = 0;
4743
4744 rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
4745 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
4746pmcraid_isr_out:
4747 return rc;
89a36810
AR		 4748}
4749
4750/**
4751 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4752 * @pinstance: per adapter instance structure pointer
4753 * @max_index: number of buffer blocks to release
4754 *
4755 * Return Value
4756 * None
4757 */
4758static void
4759pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4760{
4761 int i;
4762 for (i = 0; i < max_index; i++) {
4763 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4764 pinstance->cmd_list[i] = NULL;
4765 }
4766 kmem_cache_destroy(pinstance->cmd_cachep);
4767 pinstance->cmd_cachep = NULL;
4768}
4769
4770/**
4771 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4772 * @pinstance: pointer to per adapter instance structure
4773 * @max_index: number of buffers (from 0 onwards) to release
4774 *
4775 * This function assumes that the command blocks for which control blocks are
4776 * linked are not released.
4777 *
4778 * Return Value
4779 * None
4780 */
4781static void
4782pmcraid_release_control_blocks(
4783 struct pmcraid_instance *pinstance,
4784 int max_index
4785)
4786{
4787 int i;
4788
4789 if (pinstance->control_pool == NULL)
4790 return;
4791
4792 for (i = 0; i < max_index; i++) {
4793 pci_pool_free(pinstance->control_pool,
4794 pinstance->cmd_list[i]->ioa_cb,
4795 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4796 pinstance->cmd_list[i]->ioa_cb = NULL;
4797 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4798 }
4799 pci_pool_destroy(pinstance->control_pool);
4800 pinstance->control_pool = NULL;
4801}
4802
4803/**
4804 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4805 * @pinstance - pointer to per adapter instance structure
4806 *
4807 * Allocates memory for command blocks using kernel slab allocator.
4808 *
4809 * Return Value
4810 * 0 in case of success; -ENOMEM in case of failure
4811 */
4812static int __devinit
4813pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4814{
4815 int i;
4816
4817 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4818 pinstance->host->unique_id);
4819
4820
4821 pinstance->cmd_cachep = kmem_cache_create(
4822 pinstance->cmd_pool_name,
4823 sizeof(struct pmcraid_cmd), 0,
4824 SLAB_HWCACHE_ALIGN, NULL);
4825 if (!pinstance->cmd_cachep)
4826 return -ENOMEM;
4827
4828 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4829 pinstance->cmd_list[i] =
4830 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4831 if (!pinstance->cmd_list[i]) {
4832 pmcraid_release_cmd_blocks(pinstance, i);
4833 return -ENOMEM;
4834 }
4835 }
4836 return 0;
4837}
4838
4839/**
4840 * pmcraid_allocate_control_blocks - allocates memory control blocks
4841 * @pinstance : pointer to per adapter instance structure
4842 *
4843 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4844 * and IOASAs. This is called after command blocks are already allocated.
4845 *
4846 * Return Value
4847 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4848 */
4849static int __devinit
4850pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4851{
4852 int i;
4853
4854 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4855 pinstance->host->unique_id);
4856
4857 pinstance->control_pool =
4858 pci_pool_create(pinstance->ctl_pool_name,
4859 pinstance->pdev,
4860 sizeof(struct pmcraid_control_block),
4861 PMCRAID_IOARCB_ALIGNMENT, 0);
4862
4863 if (!pinstance->control_pool)
4864 return -ENOMEM;
4865
4866 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4867 pinstance->cmd_list[i]->ioa_cb =
4868 pci_pool_alloc(
4869 pinstance->control_pool,
4870 GFP_KERNEL,
4871 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4872
4873 if (!pinstance->cmd_list[i]->ioa_cb) {
4874 pmcraid_release_control_blocks(pinstance, i);
4875 return -ENOMEM;
4876 }
4877 memset(pinstance->cmd_list[i]->ioa_cb, 0,
4878 sizeof(struct pmcraid_control_block));
4879 }
4880 return 0;
4881}
4882
4883/**
4884 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4885 * @pinstance: pointer to per adapter instance structure
4886 * @maxindex: size of hrrq buffer pointer array
4887 *
4888 * Return Value
4889 * None
4890 */
4891static void
4892pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4893{
4894 int i;
4895 for (i = 0; i < maxindex; i++) {
4896
4897 pci_free_consistent(pinstance->pdev,
4898 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4899 pinstance->hrrq_start[i],
4900 pinstance->hrrq_start_bus_addr[i]);
4901
4902 /* reset pointers and toggle bit to zeros */
4903 pinstance->hrrq_start[i] = NULL;
4904 pinstance->hrrq_start_bus_addr[i] = 0;
4905 pinstance->host_toggle_bit[i] = 0;
4906 }
4907}
4908
4909/**
4910 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4911 * @pinstance: pointer to per adapter instance structure
4912 *
4913 * Return value
4914 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4915 */
4916static int __devinit
4917pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4918{
c20c4267 4919 int i, buffer_size;
89a36810 4920
c20c4267 4921 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
89a36810 4922
c20c4267 4923 for (i = 0; i < pinstance->num_hrrq; i++) {
89a36810
AR		 4924 pinstance->hrrq_start[i] =
4925 pci_alloc_consistent(
4926 pinstance->pdev,
4927 buffer_size,
4928 &(pinstance->hrrq_start_bus_addr[i]));
4929
4930 if (pinstance->hrrq_start[i] == 0) {
c20c4267
AR		 4931 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4932 i);
89a36810
AR		 4933 pmcraid_release_host_rrqs(pinstance, i);
4934 return -ENOMEM;
4935 }
4936
4937 memset(pinstance->hrrq_start[i], 0, buffer_size);
4938 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4939 pinstance->hrrq_end[i] =
c20c4267 4940 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
89a36810
AR		 4941 pinstance->host_toggle_bit[i] = 1;
4942 spin_lock_init(&pinstance->hrrq_lock[i]);
4943 }
4944 return 0;
4945}
4946
4947/**
4948 * pmcraid_release_hcams - release HCAM buffers
4949 *
4950 * @pinstance: pointer to per adapter instance structure
4951 *
4952 * Return value
4953 * none
4954 */
4955static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4956{
4957 if (pinstance->ccn.msg != NULL) {
4958 pci_free_consistent(pinstance->pdev,
4959 PMCRAID_AEN_HDR_SIZE +
c20c4267 4960 sizeof(struct pmcraid_hcam_ccn_ext),
89a36810
AR		 4961 pinstance->ccn.msg,
4962 pinstance->ccn.baddr);
4963
4964 pinstance->ccn.msg = NULL;
4965 pinstance->ccn.hcam = NULL;
4966 pinstance->ccn.baddr = 0;
4967 }
4968
4969 if (pinstance->ldn.msg != NULL) {
4970 pci_free_consistent(pinstance->pdev,
4971 PMCRAID_AEN_HDR_SIZE +
4972 sizeof(struct pmcraid_hcam_ldn),
4973 pinstance->ldn.msg,
4974 pinstance->ldn.baddr);
4975
4976 pinstance->ldn.msg = NULL;
4977 pinstance->ldn.hcam = NULL;
4978 pinstance->ldn.baddr = 0;
4979 }
4980}
4981
4982/**
4983 * pmcraid_allocate_hcams - allocates HCAM buffers
4984 * @pinstance : pointer to per adapter instance structure
4985 *
4986 * Return Value:
4987 * 0 in case of successful allocation, non-zero otherwise
4988 */
4989static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
4990{
4991 pinstance->ccn.msg = pci_alloc_consistent(
4992 pinstance->pdev,
4993 PMCRAID_AEN_HDR_SIZE +
c20c4267 4994 sizeof(struct pmcraid_hcam_ccn_ext),
89a36810
AR		 4995 &(pinstance->ccn.baddr));
4996
4997 pinstance->ldn.msg = pci_alloc_consistent(
4998 pinstance->pdev,
4999 PMCRAID_AEN_HDR_SIZE +
5000 sizeof(struct pmcraid_hcam_ldn),
5001 &(pinstance->ldn.baddr));
5002
5003 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
5004 pmcraid_release_hcams(pinstance);
5005 } else {
5006 pinstance->ccn.hcam =
5007 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
5008 pinstance->ldn.hcam =
5009 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
5010
5011 atomic_set(&pinstance->ccn.ignore, 0);
5012 atomic_set(&pinstance->ldn.ignore, 0);
5013 }
5014
5015 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
5016}
5017
5018/**
5019 * pmcraid_release_config_buffers - release config.table buffers
5020 * @pinstance: pointer to per adapter instance structure
5021 *
5022 * Return Value
5023 * none
5024 */
5025static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
5026{
5027 if (pinstance->cfg_table != NULL &&
5028 pinstance->cfg_table_bus_addr != 0) {
5029 pci_free_consistent(pinstance->pdev,
5030 sizeof(struct pmcraid_config_table),
5031 pinstance->cfg_table,
5032 pinstance->cfg_table_bus_addr);
5033 pinstance->cfg_table = NULL;
5034 pinstance->cfg_table_bus_addr = 0;
5035 }
5036
5037 if (pinstance->res_entries != NULL) {
5038 int i;
5039
5040 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5041 list_del(&pinstance->res_entries[i].queue);
5042 kfree(pinstance->res_entries);
5043 pinstance->res_entries = NULL;
5044 }
5045
5046 pmcraid_release_hcams(pinstance);
5047}
5048
5049/**
5050 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5051 * @pinstance : pointer to per adapter instance structure
5052 *
5053 * Return Value
5054 * 0 for successful allocation, -ENOMEM for any failure
5055 */
5056static int __devinit
5057pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
5058{
5059 int i;
5060
5061 pinstance->res_entries =
5062 kzalloc(sizeof(struct pmcraid_resource_entry) *
5063 PMCRAID_MAX_RESOURCES, GFP_KERNEL);
5064
5065 if (NULL == pinstance->res_entries) {
5066 pmcraid_err("failed to allocate memory for resource table\n");
5067 return -ENOMEM;
5068 }
5069
5070 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5071 list_add_tail(&pinstance->res_entries[i].queue,
5072 &pinstance->free_res_q);
5073
5074 pinstance->cfg_table =
5075 pci_alloc_consistent(pinstance->pdev,
5076 sizeof(struct pmcraid_config_table),
5077 &pinstance->cfg_table_bus_addr);
5078
5079 if (NULL == pinstance->cfg_table) {
5080 pmcraid_err("couldn't alloc DMA memory for config table\n");
5081 pmcraid_release_config_buffers(pinstance);
5082 return -ENOMEM;
5083 }
5084
5085 if (pmcraid_allocate_hcams(pinstance)) {
5086 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5087 pmcraid_release_config_buffers(pinstance);
5088 return -ENOMEM;
5089 }
5090
5091 return 0;
5092}
5093
5094/**
5095 * pmcraid_init_tasklets - registers tasklets for response handling
5096 *
5097 * @pinstance: pointer adapter instance structure
5098 *
5099 * Return value
5100 * none
5101 */
5102static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
5103{
5104 int i;
5105 for (i = 0; i < pinstance->num_hrrq; i++)
5106 tasklet_init(&pinstance->isr_tasklet[i],
5107 pmcraid_tasklet_function,
5108 (unsigned long)&pinstance->hrrq_vector[i]);
5109}
5110
5111/**
5112 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5113 *
5114 * @pinstance: pointer to adapter instance structure
5115 *
5116 * Return value
5117 * none
5118 */
5119static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
5120{
5121 int i;
5122 for (i = 0; i < pinstance->num_hrrq; i++)
5123 tasklet_kill(&pinstance->isr_tasklet[i]);
5124}
5125
c20c4267
AR		 5126/**
5127 * pmcraid_release_buffers - release per-adapter buffers allocated
5128 *
5129 * @pinstance: pointer to adapter soft state
5130 *
5131 * Return Value
5132 * none
5133 */
5134static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
5135{
5136 pmcraid_release_config_buffers(pinstance);
5137 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
5138 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5139 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5140
5141 if (pinstance->inq_data != NULL) {
5142 pci_free_consistent(pinstance->pdev,
5143 sizeof(struct pmcraid_inquiry_data),
5144 pinstance->inq_data,
5145 pinstance->inq_data_baddr);
5146
5147 pinstance->inq_data = NULL;
5148 pinstance->inq_data_baddr = 0;
5149 }
5150}
5151
89a36810
AR		 5152/**
5153 * pmcraid_init_buffers - allocates memory and initializes various structures
5154 * @pinstance: pointer to per adapter instance structure
5155 *
5156 * This routine pre-allocates memory based on the type of block as below:
5157 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5158 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5159 * config-table entries : DMAable memory using pci_alloc_consistent
5160 * HostRRQs : DMAable memory, using pci_alloc_consistent
5161 *
5162 * Return Value
5163 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5164 */
5165static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
5166{
5167 int i;
5168
5169 if (pmcraid_allocate_host_rrqs(pinstance)) {
5170 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5171 pinstance->num_hrrq);
5172 return -ENOMEM;
5173 }
5174
5175 if (pmcraid_allocate_config_buffers(pinstance)) {
5176 pmcraid_err("couldn't allocate memory for config buffers\n");
5177 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5178 return -ENOMEM;
5179 }
5180
5181 if (pmcraid_allocate_cmd_blocks(pinstance)) {
c20c4267 5182 pmcraid_err("couldn't allocate memory for cmd blocks\n");
89a36810
AR		 5183 pmcraid_release_config_buffers(pinstance);
5184 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5185 return -ENOMEM;
5186 }
5187
5188 if (pmcraid_allocate_control_blocks(pinstance)) {
c20c4267 5189 pmcraid_err("couldn't allocate memory control blocks\n");
89a36810
AR		 5190 pmcraid_release_config_buffers(pinstance);
5191 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5192 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5193 return -ENOMEM;
5194 }
5195
c20c4267
AR		 5196 /* allocate DMAable memory for page D0 INQUIRY buffer */
5197 pinstance->inq_data = pci_alloc_consistent(
5198 pinstance->pdev,
5199 sizeof(struct pmcraid_inquiry_data),
5200 &pinstance->inq_data_baddr);
5201
5202 if (pinstance->inq_data == NULL) {
5203 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5204 pmcraid_release_buffers(pinstance);
5205 return -ENOMEM;
5206 }
5207
89a36810
AR		 5208 /* Initialize all the command blocks and add them to free pool. No
5209 * need to lock (free_pool_lock) as this is done in initialization
5210 * itself
5211 */
5212 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5213 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5214 pmcraid_init_cmdblk(cmdp, i);
5215 cmdp->drv_inst = pinstance;
5216 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5217 }
5218
5219 return 0;
5220}
5221
5222/**
5223 * pmcraid_reinit_buffers - resets various buffer pointers
5224 * @pinstance: pointer to adapter instance
5225 * Return value
c20c4267 5226 * none
89a36810
AR		 5227 */
5228static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5229{
5230 int i;
5231 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5232
5233 for (i = 0; i < pinstance->num_hrrq; i++) {
5234 memset(pinstance->hrrq_start[i], 0, buffer_size);
5235 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5236 pinstance->hrrq_end[i] =
5237 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5238 pinstance->host_toggle_bit[i] = 1;
5239 }
5240}
5241
5242/**
5243 * pmcraid_init_instance - initialize per instance data structure
5244 * @pdev: pointer to pci device structure
5245 * @host: pointer to Scsi_Host structure
5246 * @mapped_pci_addr: memory mapped IOA configuration registers
5247 *
5248 * Return Value
5249 * 0 on success, non-zero in case of any failure
5250 */
5251static int __devinit pmcraid_init_instance(
5252 struct pci_dev *pdev,
5253 struct Scsi_Host *host,
5254 void __iomem *mapped_pci_addr
5255)
5256{
5257 struct pmcraid_instance *pinstance =
5258 (struct pmcraid_instance *)host->hostdata;
5259
5260 pinstance->host = host;
5261 pinstance->pdev = pdev;
5262
5263 /* Initialize register addresses */
5264 pinstance->mapped_dma_addr = mapped_pci_addr;
5265
5266 /* Initialize chip-specific details */
5267 {
5268 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5269 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5270
5271 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5272
5273 pint_regs->ioa_host_interrupt_reg =
5274 mapped_pci_addr + chip_cfg->ioa_host_intr;
5275 pint_regs->ioa_host_interrupt_clr_reg =
5276 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
c20c4267
AR		 5277 pint_regs->ioa_host_msix_interrupt_reg =
5278 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
89a36810
AR		 5279 pint_regs->host_ioa_interrupt_reg =
5280 mapped_pci_addr + chip_cfg->host_ioa_intr;
5281 pint_regs->host_ioa_interrupt_clr_reg =
5282 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5283
5284 /* Current version of firmware exposes interrupt mask set
5285 * and mask clr registers through memory mapped bar0.
5286 */
5287 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5288 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5289 pint_regs->ioa_host_interrupt_mask_reg =
5290 mapped_pci_addr + chip_cfg->ioa_host_mask;
5291 pint_regs->ioa_host_interrupt_mask_clr_reg =
5292 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5293 pint_regs->global_interrupt_mask_reg =
5294 mapped_pci_addr + chip_cfg->global_intr_mask;
5295 };
5296
5297 pinstance->ioa_reset_attempts = 0;
5298 init_waitqueue_head(&pinstance->reset_wait_q);
5299
5300 atomic_set(&pinstance->outstanding_cmds, 0);
c20c4267 5301 atomic_set(&pinstance->last_message_id, 0);
89a36810
AR		 5302 atomic_set(&pinstance->expose_resources, 0);
5303
5304 INIT_LIST_HEAD(&pinstance->free_res_q);
5305 INIT_LIST_HEAD(&pinstance->used_res_q);
5306 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5307 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5308
5309 spin_lock_init(&pinstance->free_pool_lock);
5310 spin_lock_init(&pinstance->pending_pool_lock);
5311 spin_lock_init(&pinstance->resource_lock);
5312 mutex_init(&pinstance->aen_queue_lock);
5313
5314 /* Work-queue (Shared) for deferred processing error handling */
5315 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5316
5317 /* Initialize the default log_level */
5318 pinstance->current_log_level = pmcraid_log_level;
5319
5320 /* Setup variables required for reset engine */
5321 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5322 pinstance->reset_cmd = NULL;
5323 return 0;
5324}
5325
89a36810
AR		 5326/**
5327 * pmcraid_shutdown - shutdown adapter controller.
5328 * @pdev: pci device struct
5329 *
5330 * Issues an adapter shutdown to the card waits for its completion
5331 *
5332 * Return value
5333 * none
5334 */
5335static void pmcraid_shutdown(struct pci_dev *pdev)
5336{
5337 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5338 pmcraid_reset_bringdown(pinstance);
5339}
5340
5341
5342/**
5343 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5344 */
5345static unsigned short pmcraid_get_minor(void)
5346{
5347 int minor;
5348
5349 minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
5350 __set_bit(minor, pmcraid_minor);
5351 return minor;
5352}
5353
5354/**
5355 * pmcraid_release_minor - releases given minor back to minor number bitmap
5356 */
5357static void pmcraid_release_minor(unsigned short minor)
5358{
5359 __clear_bit(minor, pmcraid_minor);
5360}
5361
5362/**
5363 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5364 *
5365 * @pinstance: pointer to adapter instance for which to register device
5366 *
5367 * Return value
5368 * 0 in case of success, otherwise non-zero
5369 */
5370static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5371{
5372 int minor;
5373 int error;
5374
5375 minor = pmcraid_get_minor();
5376 cdev_init(&pinstance->cdev, &pmcraid_fops);
5377 pinstance->cdev.owner = THIS_MODULE;
5378
5379 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5380
5381 if (error)
5382 pmcraid_release_minor(minor);
5383 else
5384 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
c20c4267 5385 NULL, "%s%u", PMCRAID_DEVFILE, minor);
89a36810
AR		 5386 return error;
5387}
5388
5389/**
5390 * pmcraid_release_chrdev - unregisters per-adapter management interface
5391 *
5392 * @pinstance: pointer to adapter instance structure
5393 *
5394 * Return value
5395 * none
5396 */
5397static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5398{
5399 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5400 device_destroy(pmcraid_class,
5401 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5402 cdev_del(&pinstance->cdev);
5403}
5404
5405/**
5406 * pmcraid_remove - IOA hot plug remove entry point
5407 * @pdev: pci device struct
5408 *
5409 * Return value
5410 * none
5411 */
5412static void __devexit pmcraid_remove(struct pci_dev *pdev)
5413{
5414 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5415
5416 /* remove the management interface (/dev file) for this device */
5417 pmcraid_release_chrdev(pinstance);
5418
5419 /* remove host template from scsi midlayer */
5420 scsi_remove_host(pinstance->host);
5421
5422 /* block requests from mid-layer */
5423 scsi_block_requests(pinstance->host);
5424
5425 /* initiate shutdown adapter */
5426 pmcraid_shutdown(pdev);
5427
5428 pmcraid_disable_interrupts(pinstance, ~0);
5429 flush_scheduled_work();
5430
5431 pmcraid_kill_tasklets(pinstance);
5432 pmcraid_unregister_interrupt_handler(pinstance);
5433 pmcraid_release_buffers(pinstance);
5434 iounmap(pinstance->mapped_dma_addr);
5435 pci_release_regions(pdev);
5436 scsi_host_put(pinstance->host);
5437 pci_disable_device(pdev);
5438
5439 return;
5440}
5441
5442#ifdef CONFIG_PM
5443/**
5444 * pmcraid_suspend - driver suspend entry point for power management
5445 * @pdev: PCI device structure
5446 * @state: PCI power state to suspend routine
5447 *
5448 * Return Value - 0 always
5449 */
5450static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
5451{
5452 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5453
5454 pmcraid_shutdown(pdev);
5455 pmcraid_disable_interrupts(pinstance, ~0);
5456 pmcraid_kill_tasklets(pinstance);
5457 pci_set_drvdata(pinstance->pdev, pinstance);
5458 pmcraid_unregister_interrupt_handler(pinstance);
5459 pci_save_state(pdev);
5460 pci_disable_device(pdev);
5461 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5462
5463 return 0;
5464}
5465
5466/**
5467 * pmcraid_resume - driver resume entry point PCI power management
5468 * @pdev: PCI device structure
5469 *
5470 * Return Value - 0 in case of success. Error code in case of any failure
5471 */
5472static int pmcraid_resume(struct pci_dev *pdev)
5473{
5474 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5475 struct Scsi_Host *host = pinstance->host;
5476 int rc;
89a36810
AR		 5477
5478 pci_set_power_state(pdev, PCI_D0);
5479 pci_enable_wake(pdev, PCI_D0, 0);
5480 pci_restore_state(pdev);
5481
5482 rc = pci_enable_device(pdev);
5483
5484 if (rc) {
34876402 5485 dev_err(&pdev->dev, "resume: Enable device failed\n");
89a36810
AR		 5486 return rc;
5487 }
5488
5489 pci_set_master(pdev);
5490
5491 if ((sizeof(dma_addr_t) == 4) ||
5492 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5493 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5494
5495 if (rc == 0)
5496 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5497
5498 if (rc != 0) {
34876402 5499 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
89a36810
AR		 5500 goto disable_device;
5501 }
5502
c20c4267 5503 pmcraid_disable_interrupts(pinstance, ~0);
89a36810 5504 atomic_set(&pinstance->outstanding_cmds, 0);
89a36810
AR		 5505 rc = pmcraid_register_interrupt_handler(pinstance);
5506
5507 if (rc) {
34876402
AR		 5508 dev_err(&pdev->dev,
5509 "resume: couldn't register interrupt handlers\n");
89a36810
AR		 5510 rc = -ENODEV;
5511 goto release_host;
5512 }
5513
5514 pmcraid_init_tasklets(pinstance);
5515 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5516
5517 /* Start with hard reset sequence which brings up IOA to operational
5518 * state as well as completes the reset sequence.
5519 */
5520 pinstance->ioa_hard_reset = 1;
5521
5522 /* Start IOA firmware initialization and bring card to Operational
5523 * state.
5524 */
5525 if (pmcraid_reset_bringup(pinstance)) {
c20c4267 5526 dev_err(&pdev->dev, "couldn't initialize IOA\n");
89a36810
AR		 5527 rc = -ENODEV;
5528 goto release_tasklets;
5529 }
5530
5531 return 0;
5532
5533release_tasklets:
c20c4267 5534 pmcraid_disable_interrupts(pinstance, ~0);
89a36810
AR		 5535 pmcraid_kill_tasklets(pinstance);
5536 pmcraid_unregister_interrupt_handler(pinstance);
5537
5538release_host:
5539 scsi_host_put(host);
5540
5541disable_device:
5542 pci_disable_device(pdev);
5543
5544 return rc;
5545}
5546
5547#else
5548
5549#define pmcraid_suspend NULL
5550#define pmcraid_resume NULL
5551
5552#endif /* CONFIG_PM */
5553
5554/**
5555 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
c20c4267 5556 * completion of the ioa reset
89a36810
AR		 5557 * @cmd: pointer to reset command block
5558 */
5559static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5560{
5561 struct pmcraid_instance *pinstance = cmd->drv_inst;
5562 unsigned long flags;
5563
5564 spin_lock_irqsave(pinstance->host->host_lock, flags);
5565 pmcraid_ioa_reset(cmd);
5566 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5567 scsi_unblock_requests(pinstance->host);
5568 schedule_work(&pinstance->worker_q);
5569}
5570
5571/**
5572 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5573 *
5574 * @cmd: pointer to pmcraid_cmd structure
5575 *
5576 * Return Value
5577 * 0 for success or non-zero for failure cases
5578 */
5579static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5580{
5581 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5582 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5583
5584 pmcraid_reinit_cmdblk(cmd);
5585
5586 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5587 ioarcb->request_type = REQ_TYPE_IOACMD;
5588 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5589 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5590
5591 /* If this was called as part of resource table reinitialization due to
5592 * lost CCN, it is enough to return the command block back to free pool
5593 * as part of set_supported_devs completion function.
5594 */
5595 if (cmd->drv_inst->reinit_cfg_table) {
5596 cmd->drv_inst->reinit_cfg_table = 0;
5597 cmd->release = 1;
5598 cmd_done = pmcraid_reinit_cfgtable_done;
5599 }
5600
5601 /* we will be done with the reset sequence after set supported devices,
5602 * setup the done function to return the command block back to free
5603 * pool
5604 */
5605 pmcraid_send_cmd(cmd,
5606 cmd_done,
5607 PMCRAID_SET_SUP_DEV_TIMEOUT,
5608 pmcraid_timeout_handler);
5609 return;
5610}
5611
5612/**
5613 * pmcraid_init_res_table - Initialize the resource table
5614 * @cmd: pointer to pmcraid command struct
5615 *
5616 * This function looks through the existing resource table, comparing
5617 * it with the config table. This function will take care of old/new
5618 * devices and schedule adding/removing them from the mid-layer
5619 * as appropriate.
5620 *
5621 * Return value
5622 * None
5623 */
5624static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5625{
5626 struct pmcraid_instance *pinstance = cmd->drv_inst;
5627 struct pmcraid_resource_entry *res, *temp;
5628 struct pmcraid_config_table_entry *cfgte;
5629 unsigned long lock_flags;
5630 int found, rc, i;
c20c4267 5631 u16 fw_version;
89a36810
AR		 5632 LIST_HEAD(old_res);
5633
5634 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
34876402 5635 pmcraid_err("IOA requires microcode download\n");
89a36810 5636
c20c4267
AR		 5637 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5638
89a36810
AR		 5639 /* resource list is protected by pinstance->resource_lock.
5640 * init_res_table can be called from probe (user-thread) or runtime
5641 * reset (timer/tasklet)
5642 */
5643 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5644
5645 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5646 list_move_tail(&res->queue, &old_res);
5647
5648 for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
c20c4267
AR		 5649 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5650 PMCRAID_FW_VERSION_1)
5651 cfgte = &pinstance->cfg_table->entries[i];
5652 else
5653 cfgte = (struct pmcraid_config_table_entry *)
5654 &pinstance->cfg_table->entries_ext[i];
89a36810 5655
c20c4267 5656 if (!pmcraid_expose_resource(fw_version, cfgte))
89a36810
AR		 5657 continue;
5658
5659 found = 0;
5660
5661 /* If this entry was already detected and initialized */
5662 list_for_each_entry_safe(res, temp, &old_res, queue) {
5663
5664 rc = memcmp(&res->cfg_entry.resource_address,
5665 &cfgte->resource_address,
5666 sizeof(cfgte->resource_address));
5667 if (!rc) {
5668 list_move_tail(&res->queue,
5669 &pinstance->used_res_q);
5670 found = 1;
5671 break;
5672 }
5673 }
5674
5675 /* If this is new entry, initialize it and add it the queue */
5676 if (!found) {
5677
5678 if (list_empty(&pinstance->free_res_q)) {
34876402 5679 pmcraid_err("Too many devices attached\n");
89a36810
AR		 5680 break;
5681 }
5682
5683 found = 1;
5684 res = list_entry(pinstance->free_res_q.next,
5685 struct pmcraid_resource_entry, queue);
5686
5687 res->scsi_dev = NULL;
5688 res->change_detected = RES_CHANGE_ADD;
5689 res->reset_progress = 0;
5690 list_move_tail(&res->queue, &pinstance->used_res_q);
5691 }
5692
5693 /* copy new configuration table entry details into driver
5694 * maintained resource entry
5695 */
5696 if (found) {
5697 memcpy(&res->cfg_entry, cfgte,
c20c4267 5698 pinstance->config_table_entry_size);
89a36810
AR		 5699 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5700 res->cfg_entry.resource_type,
c20c4267
AR		 5701 (fw_version <= PMCRAID_FW_VERSION_1 ?
5702 res->cfg_entry.unique_flags1 :
5703 res->cfg_entry.array_id & 0xFF),
89a36810
AR		 5704 le32_to_cpu(res->cfg_entry.resource_address));
5705 }
5706 }
5707
5708 /* Detect any deleted entries, mark them for deletion from mid-layer */
5709 list_for_each_entry_safe(res, temp, &old_res, queue) {
5710
5711 if (res->scsi_dev) {
5712 res->change_detected = RES_CHANGE_DEL;
5713 res->cfg_entry.resource_handle =
5714 PMCRAID_INVALID_RES_HANDLE;
5715 list_move_tail(&res->queue, &pinstance->used_res_q);
5716 } else {
5717 list_move_tail(&res->queue, &pinstance->free_res_q);
5718 }
5719 }
5720
5721 /* release the resource list lock */
5722 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5723 pmcraid_set_supported_devs(cmd);
5724}
5725
5726/**
5727 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5728 * @cmd: pointer pmcraid_cmd struct
5729 *
5730 * This function sends a Query IOA Configuration command to the adapter to
5731 * retrieve the IOA configuration table.
5732 *
5733 * Return value:
5734 * none
5735 */
5736static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5737{
5738 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5739 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5740 struct pmcraid_instance *pinstance = cmd->drv_inst;
5741 int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5742
c20c4267
AR		 5743 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5744 PMCRAID_FW_VERSION_1)
5745 pinstance->config_table_entry_size =
5746 sizeof(struct pmcraid_config_table_entry);
5747 else
5748 pinstance->config_table_entry_size =
5749 sizeof(struct pmcraid_config_table_entry_ext);
5750
89a36810
AR		 5751 ioarcb->request_type = REQ_TYPE_IOACMD;
5752 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5753
5754 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5755
5756 /* firmware requires 4-byte length field, specified in B.E format */
5757 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5758
5759 /* Since entire config table can be described by single IOADL, it can
5760 * be part of IOARCB itself
5761 */
5762 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5763 offsetof(struct pmcraid_ioarcb,
5764 add_data.u.ioadl[0]));
5765 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5766 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5767
5768 ioarcb->request_flags0 |= NO_LINK_DESCS;
5769 ioarcb->data_transfer_length =
5770 cpu_to_le32(sizeof(struct pmcraid_config_table));
5771
5772 ioadl = &(ioarcb->add_data.u.ioadl[0]);
88197966 5773 ioadl->flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 5774 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5775 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5776
5777 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5778 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5779}
5780
5781
5782/**
c20c4267 5783 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
89a36810
AR		 5784 * @pdev: pointer to pci device structure
5785 * @dev_id: pointer to device ids structure
5786 *
5787 * Return Value
5788 * returns 0 if the device is claimed and successfully configured.
5789 * returns non-zero error code in case of any failure
5790 */
5791static int __devinit pmcraid_probe(
5792 struct pci_dev *pdev,
5793 const struct pci_device_id *dev_id
5794)
5795{
5796 struct pmcraid_instance *pinstance;
5797 struct Scsi_Host *host;
5798 void __iomem *mapped_pci_addr;
5799 int rc = PCIBIOS_SUCCESSFUL;
5800
5801 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5802 pmcraid_err
5803 ("maximum number(%d) of supported adapters reached\n",
5804 atomic_read(&pmcraid_adapter_count));
5805 return -ENOMEM;
5806 }
5807
5808 atomic_inc(&pmcraid_adapter_count);
5809 rc = pci_enable_device(pdev);
5810
5811 if (rc) {
5812 dev_err(&pdev->dev, "Cannot enable adapter\n");
5813 atomic_dec(&pmcraid_adapter_count);
5814 return rc;
5815 }
5816
5817 dev_info(&pdev->dev,
5818 "Found new IOA(%x:%x), Total IOA count: %d\n",
5819 pdev->vendor, pdev->device,
5820 atomic_read(&pmcraid_adapter_count));
5821
5822 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5823
5824 if (rc < 0) {
5825 dev_err(&pdev->dev,
5826 "Couldn't register memory range of registers\n");
5827 goto out_disable_device;
5828 }
5829
5830 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5831
5832 if (!mapped_pci_addr) {
5833 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5834 rc = -ENOMEM;
5835 goto out_release_regions;
5836 }
5837
5838 pci_set_master(pdev);
5839
5840 /* Firmware requires the system bus address of IOARCB to be within
5841 * 32-bit addressable range though it has 64-bit IOARRIN register.
5842 * However, firmware supports 64-bit streaming DMA buffers, whereas
5843 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5844 * returns memory within 4GB (if not, change this logic), coherent
5845 * buffers are within firmware acceptible address ranges.
5846 */
5847 if ((sizeof(dma_addr_t) == 4) ||
5848 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5849 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5850
5851 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5852 * bit mask for pci_alloc_consistent to return addresses within 4GB
5853 */
5854 if (rc == 0)
5855 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5856
5857 if (rc != 0) {
5858 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5859 goto cleanup_nomem;
5860 }
5861
5862 host = scsi_host_alloc(&pmcraid_host_template,
5863 sizeof(struct pmcraid_instance));
5864
5865 if (!host) {
5866 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5867 rc = -ENOMEM;
5868 goto cleanup_nomem;
5869 }
5870
5871 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5872 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5873 host->unique_id = host->host_no;
5874 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5875 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5876
5877 /* zero out entire instance structure */
5878 pinstance = (struct pmcraid_instance *)host->hostdata;
5879 memset(pinstance, 0, sizeof(*pinstance));
5880
5881 pinstance->chip_cfg =
5882 (struct pmcraid_chip_details *)(dev_id->driver_data);
5883
5884 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5885
5886 if (rc < 0) {
5887 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5888 goto out_scsi_host_put;
5889 }
5890
5891 pci_set_drvdata(pdev, pinstance);
5892
5893 /* Save PCI config-space for use following the reset */
5894 rc = pci_save_state(pinstance->pdev);
5895
5896 if (rc != 0) {
5897 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5898 goto out_scsi_host_put;
5899 }
5900
5901 pmcraid_disable_interrupts(pinstance, ~0);
5902
5903 rc = pmcraid_register_interrupt_handler(pinstance);
5904
5905 if (rc) {
34876402 5906 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
89a36810
AR		 5907 goto out_scsi_host_put;
5908 }
5909
5910 pmcraid_init_tasklets(pinstance);
5911
5912 /* allocate verious buffers used by LLD.*/
5913 rc = pmcraid_init_buffers(pinstance);
5914
5915 if (rc) {
5916 pmcraid_err("couldn't allocate memory blocks\n");
5917 goto out_unregister_isr;
5918 }
5919
5920 /* check the reset type required */
5921 pmcraid_reset_type(pinstance);
5922
5923 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5924
5925 /* Start IOA firmware initialization and bring card to Operational
5926 * state.
5927 */
5928 pmcraid_info("starting IOA initialization sequence\n");
5929 if (pmcraid_reset_bringup(pinstance)) {
c20c4267 5930 dev_err(&pdev->dev, "couldn't initialize IOA\n");
89a36810
AR		 5931 rc = 1;
5932 goto out_release_bufs;
5933 }
5934
5935 /* Add adapter instance into mid-layer list */
5936 rc = scsi_add_host(pinstance->host, &pdev->dev);
5937 if (rc != 0) {
5938 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
5939 goto out_release_bufs;
5940 }
5941
5942 scsi_scan_host(pinstance->host);
5943
5944 rc = pmcraid_setup_chrdev(pinstance);
5945
5946 if (rc != 0) {
5947 pmcraid_err("couldn't create mgmt interface, error: %x\n",
5948 rc);
5949 goto out_remove_host;
5950 }
5951
5952 /* Schedule worker thread to handle CCN and take care of adding and
5953 * removing devices to OS
5954 */
5955 atomic_set(&pinstance->expose_resources, 1);
5956 schedule_work(&pinstance->worker_q);
5957 return rc;
5958
5959out_remove_host:
5960 scsi_remove_host(host);
5961
5962out_release_bufs:
5963 pmcraid_release_buffers(pinstance);
5964
5965out_unregister_isr:
5966 pmcraid_kill_tasklets(pinstance);
5967 pmcraid_unregister_interrupt_handler(pinstance);
5968
5969out_scsi_host_put:
5970 scsi_host_put(host);
5971
5972cleanup_nomem:
5973 iounmap(mapped_pci_addr);
5974
5975out_release_regions:
5976 pci_release_regions(pdev);
5977
5978out_disable_device:
5979 atomic_dec(&pmcraid_adapter_count);
5980 pci_set_drvdata(pdev, NULL);
5981 pci_disable_device(pdev);
5982 return -ENODEV;
5983}
5984
5985/*
5986 * PCI driver structure of pcmraid driver
5987 */
5988static struct pci_driver pmcraid_driver = {
5989 .name = PMCRAID_DRIVER_NAME,
5990 .id_table = pmcraid_pci_table,
5991 .probe = pmcraid_probe,
5992 .remove = pmcraid_remove,
5993 .suspend = pmcraid_suspend,
5994 .resume = pmcraid_resume,
5995 .shutdown = pmcraid_shutdown
5996};
5997
89a36810
AR		 5998/**
5999 * pmcraid_init - module load entry point
6000 */
6001static int __init pmcraid_init(void)
6002{
6003 dev_t dev;
6004 int error;
6005
6006 pmcraid_info("%s Device Driver version: %s %s\n",
6007 PMCRAID_DRIVER_NAME,
6008 PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
6009
6010 error = alloc_chrdev_region(&dev, 0,
6011 PMCRAID_MAX_ADAPTERS,
6012 PMCRAID_DEVFILE);
6013
6014 if (error) {
6015 pmcraid_err("failed to get a major number for adapters\n");
6016 goto out_init;
6017 }
6018
6019 pmcraid_major = MAJOR(dev);
6020 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
6021
6022 if (IS_ERR(pmcraid_class)) {
6023 error = PTR_ERR(pmcraid_class);
6024 pmcraid_err("failed to register with with sysfs, error = %x\n",
6025 error);
6026 goto out_unreg_chrdev;
6027 }
6028
89a36810
AR		 6029 error = pmcraid_netlink_init();
6030
6031 if (error)
6032 goto out_unreg_chrdev;
6033
6034 error = pci_register_driver(&pmcraid_driver);
6035
6036 if (error == 0)
6037 goto out_init;
6038
6039 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6040 error);
6041 class_destroy(pmcraid_class);
6042 pmcraid_netlink_release();
6043
6044out_unreg_chrdev:
6045 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
34876402 6046
89a36810
AR		 6047out_init:
6048 return error;
6049}
6050
6051/**
6052 * pmcraid_exit - module unload entry point
6053 */
6054static void __exit pmcraid_exit(void)
6055{
6056 pmcraid_netlink_release();
6057 class_destroy(pmcraid_class);
6058 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
6059 PMCRAID_MAX_ADAPTERS);
6060 pci_unregister_driver(&pmcraid_driver);
6061}
6062
6063module_init(pmcraid_init);
6064module_exit(pmcraid_exit);
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