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[GitHub/mt8127/android_kernel_alcatel_ttab.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;
5da61410 65static unsigned int pmcraid_enable_msix;
89a36810
AR		 66
67/*
68 * Data structures to support multiple adapters by the LLD.
69 * pmcraid_adapter_count - count of configured adapters
70 */
71static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
72
73/*
74 * Supporting user-level control interface through IOCTL commands.
75 * pmcraid_major - major number to use
76 * pmcraid_minor - minor number(s) to use
77 */
78static unsigned int pmcraid_major;
79static struct class *pmcraid_class;
80DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
81
82/*
83 * Module parameters
84 */
729c8456 85MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
89a36810
AR		 86MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
87MODULE_LICENSE("GPL");
88MODULE_VERSION(PMCRAID_DRIVER_VERSION);
89
90module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
91MODULE_PARM_DESC(log_level,
92 "Enables firmware error code logging, default :1 high-severity"
93 " errors, 2: all errors including high-severity errors,"
94 " 0: disables logging");
95
96module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
97MODULE_PARM_DESC(debug,
98 "Enable driver verbose message logging. Set 1 to enable."
99 "(default: 0)");
100
101module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
102MODULE_PARM_DESC(disable_aen,
103 "Disable driver aen notifications to apps. Set 1 to disable."
104 "(default: 0)");
105
106/* chip specific constants for PMC MaxRAID controllers (same for
107 * 0x5220 and 0x8010
108 */
109static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
110 {
111 .ioastatus = 0x0,
112 .ioarrin = 0x00040,
113 .mailbox = 0x7FC30,
114 .global_intr_mask = 0x00034,
115 .ioa_host_intr = 0x0009C,
116 .ioa_host_intr_clr = 0x000A0,
c20c4267 117 .ioa_host_msix_intr = 0x7FC40,
89a36810
AR		 118 .ioa_host_mask = 0x7FC28,
119 .ioa_host_mask_clr = 0x7FC28,
120 .host_ioa_intr = 0x00020,
121 .host_ioa_intr_clr = 0x00020,
122 .transop_timeout = 300
123 }
124};
125
126/*
127 * PCI device ids supported by pmcraid driver
128 */
129static struct pci_device_id pmcraid_pci_table[] __devinitdata = {
130 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
131 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
132 },
133 {}
134};
135
136MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
137
138
139
140/**
141 * pmcraid_slave_alloc - Prepare for commands to a device
142 * @scsi_dev: scsi device struct
143 *
144 * This function is called by mid-layer prior to sending any command to the new
145 * device. Stores resource entry details of the device in scsi_device struct.
146 * Queuecommand uses the resource handle and other details to fill up IOARCB
147 * while sending commands to the device.
148 *
149 * Return value:
150 * 0 on success / -ENXIO if device does not exist
151 */
152static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
153{
154 struct pmcraid_resource_entry *temp, *res = NULL;
155 struct pmcraid_instance *pinstance;
156 u8 target, bus, lun;
157 unsigned long lock_flags;
158 int rc = -ENXIO;
c20c4267
AR		 159 u16 fw_version;
160
89a36810
AR		 161 pinstance = shost_priv(scsi_dev->host);
162
c20c4267
AR		 163 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
164
89a36810
AR		 165 /* Driver exposes VSET and GSCSI resources only; all other device types
166 * are not exposed. Resource list is synchronized using resource lock
167 * so any traversal or modifications to the list should be done inside
168 * this lock
169 */
170 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
171 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
172
729c8456 173 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
89a36810 174 if (RES_IS_VSET(temp->cfg_entry)) {
c20c4267
AR		 175 if (fw_version <= PMCRAID_FW_VERSION_1)
176 target = temp->cfg_entry.unique_flags1;
177 else
178 target = temp->cfg_entry.array_id & 0xFF;
179
729c8456 180 if (target > PMCRAID_MAX_VSET_TARGETS)
89a36810
AR		 181 continue;
182 bus = PMCRAID_VSET_BUS_ID;
183 lun = 0;
184 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
185 target = RES_TARGET(temp->cfg_entry.resource_address);
186 bus = PMCRAID_PHYS_BUS_ID;
187 lun = RES_LUN(temp->cfg_entry.resource_address);
188 } else {
189 continue;
190 }
191
192 if (bus == scsi_dev->channel &&
193 target == scsi_dev->id &&
194 lun == scsi_dev->lun) {
195 res = temp;
196 break;
197 }
198 }
199
200 if (res) {
201 res->scsi_dev = scsi_dev;
202 scsi_dev->hostdata = res;
203 res->change_detected = 0;
204 atomic_set(&res->read_failures, 0);
205 atomic_set(&res->write_failures, 0);
206 rc = 0;
207 }
208 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
209 return rc;
210}
211
212/**
213 * pmcraid_slave_configure - Configures a SCSI device
214 * @scsi_dev: scsi device struct
215 *
25985edc 216 * This function is executed by SCSI mid layer just after a device is first
89a36810
AR		 217 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
218 * timeout value (default 30s) will be over-written to a higher value (60s)
219 * and max_sectors value will be over-written to 512. It also sets queue depth
220 * to host->cmd_per_lun value
221 *
222 * Return value:
223 * 0 on success
224 */
225static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
226{
227 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
228
229 if (!res)
230 return 0;
231
232 /* LLD exposes VSETs and Enclosure devices only */
233 if (RES_IS_GSCSI(res->cfg_entry) &&
234 scsi_dev->type != TYPE_ENCLOSURE)
235 return -ENXIO;
236
237 pmcraid_info("configuring %x:%x:%x:%x\n",
238 scsi_dev->host->unique_id,
239 scsi_dev->channel,
240 scsi_dev->id,
241 scsi_dev->lun);
242
243 if (RES_IS_GSCSI(res->cfg_entry)) {
244 scsi_dev->allow_restart = 1;
245 } else if (RES_IS_VSET(res->cfg_entry)) {
246 scsi_dev->allow_restart = 1;
247 blk_queue_rq_timeout(scsi_dev->request_queue,
248 PMCRAID_VSET_IO_TIMEOUT);
086fa5ff 249 blk_queue_max_hw_sectors(scsi_dev->request_queue,
89a36810
AR		 250 PMCRAID_VSET_MAX_SECTORS);
251 }
252
253 if (scsi_dev->tagged_supported &&
254 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
255 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
256 scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
257 scsi_dev->host->cmd_per_lun);
258 } else {
259 scsi_adjust_queue_depth(scsi_dev, 0,
260 scsi_dev->host->cmd_per_lun);
261 }
262
263 return 0;
264}
265
266/**
267 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
268 *
269 * @scsi_dev: scsi device struct
270 *
271 * This is called by mid-layer before removing a device. Pointer assignments
272 * done in pmcraid_slave_alloc will be reset to NULL here.
273 *
274 * Return value
275 * none
276 */
277static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
278{
279 struct pmcraid_resource_entry *res;
280
281 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
282
283 if (res)
284 res->scsi_dev = NULL;
285
286 scsi_dev->hostdata = NULL;
287}
288
289/**
290 * pmcraid_change_queue_depth - Change the device's queue depth
291 * @scsi_dev: scsi device struct
292 * @depth: depth to set
e881a172 293 * @reason: calling context
89a36810
AR		 294 *
295 * Return value
c20c4267 296 * actual depth set
89a36810 297 */
e881a172
MC		 298static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
299 int reason)
89a36810 300{
e881a172
MC		 301 if (reason != SCSI_QDEPTH_DEFAULT)
302 return -EOPNOTSUPP;
303
89a36810
AR		 304 if (depth > PMCRAID_MAX_CMD_PER_LUN)
305 depth = PMCRAID_MAX_CMD_PER_LUN;
306
307 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
308
309 return scsi_dev->queue_depth;
310}
311
312/**
313 * pmcraid_change_queue_type - Change the device's queue type
314 * @scsi_dev: scsi device struct
315 * @tag: type of tags to use
316 *
317 * Return value:
c20c4267 318 * actual queue type set
89a36810
AR		 319 */
320static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
321{
322 struct pmcraid_resource_entry *res;
323
324 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
325
326 if ((res) && scsi_dev->tagged_supported &&
327 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
328 scsi_set_tag_type(scsi_dev, tag);
329
330 if (tag)
331 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
332 else
333 scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
334 } else
335 tag = 0;
336
337 return tag;
338}
339
340
341/**
342 * pmcraid_init_cmdblk - initializes a command block
343 *
344 * @cmd: pointer to struct pmcraid_cmd to be initialized
345 * @index: if >=0 first time initialization; otherwise reinitialization
346 *
347 * Return Value
348 * None
349 */
350void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
351{
352 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
353 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
354
355 if (index >= 0) {
356 /* first time initialization (called from probe) */
357 u32 ioasa_offset =
358 offsetof(struct pmcraid_control_block, ioasa);
359
360 cmd->index = index;
361 ioarcb->response_handle = cpu_to_le32(index << 2);
362 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
363 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
364 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
365 } else {
366 /* re-initialization of various lengths, called once command is
367 * processed by IOA
368 */
369 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
c20c4267 370 ioarcb->hrrq_id = 0;
89a36810
AR		 371 ioarcb->request_flags0 = 0;
372 ioarcb->request_flags1 = 0;
373 ioarcb->cmd_timeout = 0;
374 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
375 ioarcb->ioadl_bus_addr = 0;
376 ioarcb->ioadl_length = 0;
377 ioarcb->data_transfer_length = 0;
378 ioarcb->add_cmd_param_length = 0;
379 ioarcb->add_cmd_param_offset = 0;
380 cmd->ioa_cb->ioasa.ioasc = 0;
381 cmd->ioa_cb->ioasa.residual_data_length = 0;
c20c4267 382 cmd->time_left = 0;
89a36810
AR		 383 }
384
385 cmd->cmd_done = NULL;
386 cmd->scsi_cmd = NULL;
387 cmd->release = 0;
388 cmd->completion_req = 0;
c20c4267
AR		 389 cmd->sense_buffer = 0;
390 cmd->sense_buffer_dma = 0;
89a36810
AR		 391 cmd->dma_handle = 0;
392 init_timer(&cmd->timer);
393}
394
395/**
396 * pmcraid_reinit_cmdblk - reinitialize a command block
397 *
398 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
399 *
400 * Return Value
401 * None
402 */
403static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
404{
405 pmcraid_init_cmdblk(cmd, -1);
406}
407
408/**
409 * pmcraid_get_free_cmd - get a free cmd block from command block pool
410 * @pinstance: adapter instance structure
411 *
412 * Return Value:
413 * returns pointer to cmd block or NULL if no blocks are available
414 */
415static struct pmcraid_cmd *pmcraid_get_free_cmd(
416 struct pmcraid_instance *pinstance
417)
418{
419 struct pmcraid_cmd *cmd = NULL;
420 unsigned long lock_flags;
421
422 /* free cmd block list is protected by free_pool_lock */
423 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
424
425 if (!list_empty(&pinstance->free_cmd_pool)) {
426 cmd = list_entry(pinstance->free_cmd_pool.next,
427 struct pmcraid_cmd, free_list);
428 list_del(&cmd->free_list);
429 }
430 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
431
432 /* Initialize the command block before giving it the caller */
433 if (cmd != NULL)
434 pmcraid_reinit_cmdblk(cmd);
435 return cmd;
436}
437
438/**
439 * pmcraid_return_cmd - return a completed command block back into free pool
440 * @cmd: pointer to the command block
441 *
442 * Return Value:
443 * nothing
444 */
445void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
446{
447 struct pmcraid_instance *pinstance = cmd->drv_inst;
448 unsigned long lock_flags;
449
450 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
451 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
452 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
453}
454
455/**
456 * pmcraid_read_interrupts - reads IOA interrupts
457 *
458 * @pinstance: pointer to adapter instance structure
459 *
460 * Return value
461 * interrupts read from IOA
462 */
463static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
464{
c20c4267
AR		 465 return (pinstance->interrupt_mode) ?
466 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
467 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
89a36810
AR		 468}
469
470/**
471 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
472 *
473 * @pinstance: pointer to per adapter instance structure
474 * @intrs: interrupts to disable
475 *
476 * Return Value
477 * None
478 */
479static void pmcraid_disable_interrupts(
480 struct pmcraid_instance *pinstance,
481 u32 intrs
482)
483{
484 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
485 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
486
89a36810 487 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
c20c4267
AR		 488 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
489 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
490
491 if (!pinstance->interrupt_mode) {
492 iowrite32(intrs,
493 pinstance->int_regs.ioa_host_interrupt_mask_reg);
494 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
495 }
89a36810
AR		 496}
497
498/**
499 * pmcraid_enable_interrupts - Enables specified interrupts
500 *
501 * @pinstance: pointer to per adapter instance structure
502 * @intr: interrupts to enable
503 *
504 * Return Value
505 * None
506 */
507static void pmcraid_enable_interrupts(
508 struct pmcraid_instance *pinstance,
509 u32 intrs
510)
511{
512 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
513 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
514
515 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
c20c4267
AR		 516
517 if (!pinstance->interrupt_mode) {
518 iowrite32(~intrs,
519 pinstance->int_regs.ioa_host_interrupt_mask_reg);
520 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
521 }
89a36810
AR		 522
523 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
524 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
525 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
526}
527
c20c4267
AR		 528/**
529 * pmcraid_clr_trans_op - clear trans to op interrupt
530 *
531 * @pinstance: pointer to per adapter instance structure
532 *
533 * Return Value
534 * None
535 */
536static void pmcraid_clr_trans_op(
537 struct pmcraid_instance *pinstance
538)
539{
540 unsigned long lock_flags;
541
542 if (!pinstance->interrupt_mode) {
543 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
544 pinstance->int_regs.ioa_host_interrupt_mask_reg);
545 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
546 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
547 pinstance->int_regs.ioa_host_interrupt_clr_reg);
548 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
549 }
550
551 if (pinstance->reset_cmd != NULL) {
552 del_timer(&pinstance->reset_cmd->timer);
553 spin_lock_irqsave(
554 pinstance->host->host_lock, lock_flags);
555 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
556 spin_unlock_irqrestore(
557 pinstance->host->host_lock, lock_flags);
558 }
559}
560
89a36810
AR		 561/**
562 * pmcraid_reset_type - Determine the required reset type
563 * @pinstance: pointer to adapter instance structure
564 *
565 * IOA requires hard reset if any of the following conditions is true.
566 * 1. If HRRQ valid interrupt is not masked
567 * 2. IOA reset alert doorbell is set
568 * 3. If there are any error interrupts
569 */
570static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
571{
572 u32 mask;
573 u32 intrs;
574 u32 alerts;
575
576 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
577 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
578 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
579
580 if ((mask & INTRS_HRRQ_VALID) == 0 ||
581 (alerts & DOORBELL_IOA_RESET_ALERT) ||
582 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
583 pmcraid_info("IOA requires hard reset\n");
584 pinstance->ioa_hard_reset = 1;
585 }
586
587 /* If unit check is active, trigger the dump */
588 if (intrs & INTRS_IOA_UNIT_CHECK)
589 pinstance->ioa_unit_check = 1;
590}
591
592/**
593 * pmcraid_bist_done - completion function for PCI BIST
594 * @cmd: pointer to reset command
595 * Return Value
c20c4267 596 * none
89a36810
AR		 597 */
598
599static void pmcraid_ioa_reset(struct pmcraid_cmd *);
600
601static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
602{
603 struct pmcraid_instance *pinstance = cmd->drv_inst;
604 unsigned long lock_flags;
605 int rc;
606 u16 pci_reg;
607
608 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
609
610 /* If PCI config space can't be accessed wait for another two secs */
611 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
c20c4267 612 cmd->time_left > 0) {
89a36810 613 pmcraid_info("BIST not complete, waiting another 2 secs\n");
c20c4267
AR		 614 cmd->timer.expires = jiffies + cmd->time_left;
615 cmd->time_left = 0;
89a36810
AR		 616 cmd->timer.data = (unsigned long)cmd;
617 cmd->timer.function =
618 (void (*)(unsigned long))pmcraid_bist_done;
619 add_timer(&cmd->timer);
620 } else {
c20c4267 621 cmd->time_left = 0;
89a36810
AR		 622 pmcraid_info("BIST is complete, proceeding with reset\n");
623 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
624 pmcraid_ioa_reset(cmd);
625 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
626 }
627}
628
629/**
630 * pmcraid_start_bist - starts BIST
631 * @cmd: pointer to reset cmd
632 * Return Value
633 * none
634 */
635static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
636{
637 struct pmcraid_instance *pinstance = cmd->drv_inst;
638 u32 doorbells, intrs;
639
640 /* proceed with bist and wait for 2 seconds */
641 iowrite32(DOORBELL_IOA_START_BIST,
642 pinstance->int_regs.host_ioa_interrupt_reg);
643 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
644 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
c20c4267 645 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
89a36810
AR		 646 doorbells, intrs);
647
c20c4267 648 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
89a36810
AR		 649 cmd->timer.data = (unsigned long)cmd;
650 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
651 cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
652 add_timer(&cmd->timer);
653}
654
655/**
656 * pmcraid_reset_alert_done - completion routine for reset_alert
657 * @cmd: pointer to command block used in reset sequence
658 * Return value
659 * None
660 */
661static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
662{
663 struct pmcraid_instance *pinstance = cmd->drv_inst;
664 u32 status = ioread32(pinstance->ioa_status);
665 unsigned long lock_flags;
666
667 /* if the critical operation in progress bit is set or the wait times
668 * out, invoke reset engine to proceed with hard reset. If there is
669 * some more time to wait, restart the timer
670 */
671 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
c20c4267 672 cmd->time_left <= 0) {
89a36810
AR		 673 pmcraid_info("critical op is reset proceeding with reset\n");
674 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
675 pmcraid_ioa_reset(cmd);
676 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
677 } else {
678 pmcraid_info("critical op is not yet reset waiting again\n");
679 /* restart timer if some more time is available to wait */
c20c4267 680 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
89a36810
AR		 681 cmd->timer.data = (unsigned long)cmd;
682 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
683 cmd->timer.function =
684 (void (*)(unsigned long))pmcraid_reset_alert_done;
685 add_timer(&cmd->timer);
686 }
687}
688
689/**
690 * pmcraid_reset_alert - alerts IOA for a possible reset
691 * @cmd : command block to be used for reset sequence.
692 *
693 * Return Value
694 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
695 * successfully written to IOA. Returns non-zero in case pci_config_space
696 * is not accessible
697 */
c20c4267 698static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
89a36810
AR		 699static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
700{
701 struct pmcraid_instance *pinstance = cmd->drv_inst;
702 u32 doorbells;
703 int rc;
704 u16 pci_reg;
705
706 /* If we are able to access IOA PCI config space, alert IOA that we are
707 * going to reset it soon. This enables IOA to preserv persistent error
708 * data if any. In case memory space is not accessible, proceed with
709 * BIST or slot_reset
710 */
711 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
712 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
713
714 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
715 * reset IOA doesn't generate any interrupts when CRITICAL
716 * OPERATION bit is reset. A timer is started to wait for this
717 * bit to be reset.
718 */
c20c4267 719 cmd->time_left = PMCRAID_RESET_TIMEOUT;
89a36810
AR		 720 cmd->timer.data = (unsigned long)cmd;
721 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
722 cmd->timer.function =
723 (void (*)(unsigned long))pmcraid_reset_alert_done;
724 add_timer(&cmd->timer);
725
726 iowrite32(DOORBELL_IOA_RESET_ALERT,
727 pinstance->int_regs.host_ioa_interrupt_reg);
728 doorbells =
729 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
730 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
731 } else {
732 pmcraid_info("PCI config is not accessible starting BIST\n");
733 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
734 pmcraid_start_bist(cmd);
735 }
736}
737
738/**
739 * pmcraid_timeout_handler - Timeout handler for internally generated ops
740 *
741 * @cmd : pointer to command structure, that got timedout
742 *
743 * This function blocks host requests and initiates an adapter reset.
744 *
745 * Return value:
746 * None
747 */
748static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
749{
750 struct pmcraid_instance *pinstance = cmd->drv_inst;
751 unsigned long lock_flags;
752
34876402 753 dev_info(&pinstance->pdev->dev,
c20c4267
AR		 754 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
755 cmd->ioa_cb->ioarcb.cdb[0]);
89a36810
AR		 756
757 /* Command timeouts result in hard reset sequence. The command that got
758 * timed out may be the one used as part of reset sequence. In this
759 * case restart reset sequence using the same command block even if
760 * reset is in progress. Otherwise fail this command and get a free
761 * command block to restart the reset sequence.
762 */
763 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
764 if (!pinstance->ioa_reset_in_progress) {
765 pinstance->ioa_reset_attempts = 0;
766 cmd = pmcraid_get_free_cmd(pinstance);
767
768 /* If we are out of command blocks, just return here itself.
769 * Some other command's timeout handler can do the reset job
770 */
771 if (cmd == NULL) {
772 spin_unlock_irqrestore(pinstance->host->host_lock,
773 lock_flags);
774 pmcraid_err("no free cmnd block for timeout handler\n");
775 return;
776 }
777
778 pinstance->reset_cmd = cmd;
779 pinstance->ioa_reset_in_progress = 1;
780 } else {
781 pmcraid_info("reset is already in progress\n");
782
783 if (pinstance->reset_cmd != cmd) {
784 /* This command should have been given to IOA, this
785 * command will be completed by fail_outstanding_cmds
786 * anyway
787 */
788 pmcraid_err("cmd is pending but reset in progress\n");
789 }
790
791 /* If this command was being used as part of the reset
792 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
793 * causes fail_outstanding_commands not to return the command
794 * block back to free pool
795 */
796 if (cmd == pinstance->reset_cmd)
797 cmd->cmd_done = pmcraid_ioa_reset;
89a36810
AR		 798 }
799
c20c4267
AR		 800 /* Notify apps of important IOA bringup/bringdown sequences */
801 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
802 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
803 pmcraid_notify_ioastate(pinstance,
804 PMC_DEVICE_EVENT_RESET_START);
805
89a36810
AR		 806 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
807 scsi_block_requests(pinstance->host);
808 pmcraid_reset_alert(cmd);
809 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
810}
811
812/**
813 * pmcraid_internal_done - completion routine for internally generated cmds
814 *
815 * @cmd: command that got response from IOA
816 *
817 * Return Value:
818 * none
819 */
820static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
821{
822 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
823 cmd->ioa_cb->ioarcb.cdb[0],
824 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
825
826 /* Some of the internal commands are sent with callers blocking for the
827 * response. Same will be indicated as part of cmd->completion_req
828 * field. Response path needs to wake up any waiters waiting for cmd
829 * completion if this flag is set.
830 */
831 if (cmd->completion_req) {
832 cmd->completion_req = 0;
833 complete(&cmd->wait_for_completion);
834 }
835
836 /* most of the internal commands are completed by caller itself, so
837 * no need to return the command block back to free pool until we are
838 * required to do so (e.g once done with initialization).
839 */
840 if (cmd->release) {
841 cmd->release = 0;
842 pmcraid_return_cmd(cmd);
843 }
844}
845
846/**
847 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
848 *
849 * @cmd: command that got response from IOA
850 *
851 * This routine is called after driver re-reads configuration table due to a
852 * lost CCN. It returns the command block back to free pool and schedules
853 * worker thread to add/delete devices into the system.
854 *
855 * Return Value:
856 * none
857 */
858static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
859{
860 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
861 cmd->ioa_cb->ioarcb.cdb[0],
862 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
863
864 if (cmd->release) {
865 cmd->release = 0;
866 pmcraid_return_cmd(cmd);
867 }
868 pmcraid_info("scheduling worker for config table reinitialization\n");
869 schedule_work(&cmd->drv_inst->worker_q);
870}
871
872/**
873 * pmcraid_erp_done - Process completion of SCSI error response from device
874 * @cmd: pmcraid_command
875 *
876 * This function copies the sense buffer into the scsi_cmd struct and completes
877 * scsi_cmd by calling scsi_done function.
878 *
879 * Return value:
880 * none
881 */
882static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
883{
884 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
885 struct pmcraid_instance *pinstance = cmd->drv_inst;
886 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
887
888 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
889 scsi_cmd->result |= (DID_ERROR << 16);
34876402
AR		 890 scmd_printk(KERN_INFO, scsi_cmd,
891 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
892 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
89a36810
AR		 893 }
894
895 /* if we had allocated sense buffers for request sense, copy the sense
896 * release the buffers
897 */
898 if (cmd->sense_buffer != NULL) {
899 memcpy(scsi_cmd->sense_buffer,
900 cmd->sense_buffer,
901 SCSI_SENSE_BUFFERSIZE);
902 pci_free_consistent(pinstance->pdev,
903 SCSI_SENSE_BUFFERSIZE,
904 cmd->sense_buffer, cmd->sense_buffer_dma);
905 cmd->sense_buffer = NULL;
906 cmd->sense_buffer_dma = 0;
907 }
908
909 scsi_dma_unmap(scsi_cmd);
910 pmcraid_return_cmd(cmd);
911 scsi_cmd->scsi_done(scsi_cmd);
912}
913
914/**
915 * pmcraid_fire_command - sends an IOA command to adapter
916 *
917 * This function adds the given block into pending command list
918 * and returns without waiting
919 *
920 * @cmd : command to be sent to the device
921 *
922 * Return Value
923 * None
924 */
925static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
926{
927 struct pmcraid_instance *pinstance = cmd->drv_inst;
928 unsigned long lock_flags;
929
930 /* Add this command block to pending cmd pool. We do this prior to
931 * writting IOARCB to ioarrin because IOA might complete the command
932 * by the time we are about to add it to the list. Response handler
c20c4267 933 * (isr/tasklet) looks for cmd block in the pending pending list.
89a36810
AR		 934 */
935 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
936 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
937 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
938 atomic_inc(&pinstance->outstanding_cmds);
939
940 /* driver writes lower 32-bit value of IOARCB address only */
941 mb();
942 iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
943 pinstance->ioarrin);
944}
945
946/**
947 * pmcraid_send_cmd - fires a command to IOA
948 *
949 * This function also sets up timeout function, and command completion
950 * function
951 *
952 * @cmd: pointer to the command block to be fired to IOA
953 * @cmd_done: command completion function, called once IOA responds
954 * @timeout: timeout to wait for this command completion
955 * @timeout_func: timeout handler
956 *
957 * Return value
958 * none
959 */
960static void pmcraid_send_cmd(
961 struct pmcraid_cmd *cmd,
962 void (*cmd_done) (struct pmcraid_cmd *),
963 unsigned long timeout,
964 void (*timeout_func) (struct pmcraid_cmd *)
965)
966{
967 /* initialize done function */
968 cmd->cmd_done = cmd_done;
969
970 if (timeout_func) {
971 /* setup timeout handler */
972 cmd->timer.data = (unsigned long)cmd;
973 cmd->timer.expires = jiffies + timeout;
974 cmd->timer.function = (void (*)(unsigned long))timeout_func;
975 add_timer(&cmd->timer);
976 }
977
978 /* fire the command to IOA */
979 _pmcraid_fire_command(cmd);
980}
981
c20c4267
AR		 982/**
983 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
984 * @cmd: pointer to the command block used for sending IOA shutdown command
985 *
986 * Return value
987 * None
988 */
989static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
990{
991 struct pmcraid_instance *pinstance = cmd->drv_inst;
992 unsigned long lock_flags;
993
994 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
995 pmcraid_ioa_reset(cmd);
996 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
997}
998
89a36810
AR		 999/**
1000 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
1001 *
1002 * @cmd: pointer to the command block used as part of reset sequence
1003 *
1004 * Return Value
1005 * None
1006 */
1007static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
1008{
1009 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
1010 cmd->ioa_cb->ioarcb.cdb[0],
1011 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1012
1013 /* Note that commands sent during reset require next command to be sent
1014 * to IOA. Hence reinit the done function as well as timeout function
1015 */
1016 pmcraid_reinit_cmdblk(cmd);
1017 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
1018 cmd->ioa_cb->ioarcb.resource_handle =
1019 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1020 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
1021 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
1022
1023 /* fire shutdown command to hardware. */
1024 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
1025 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
1026
c20c4267
AR		 1027 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
1028
1029 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
89a36810
AR		 1030 PMCRAID_SHUTDOWN_TIMEOUT,
1031 pmcraid_timeout_handler);
1032}
1033
1034/**
c20c4267
AR		 1035 * pmcraid_get_fwversion_done - completion function for get_fwversion
1036 *
1037 * @cmd: pointer to command block used to send INQUIRY command
89a36810
AR		 1038 *
1039 * Return Value
c20c4267 1040 * none
89a36810 1041 */
89a36810
AR		 1042static void pmcraid_querycfg(struct pmcraid_cmd *);
1043
c20c4267
AR		 1044static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
1045{
1046 struct pmcraid_instance *pinstance = cmd->drv_inst;
1047 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1048 unsigned long lock_flags;
1049
1050 /* configuration table entry size depends on firmware version. If fw
1051 * version is not known, it is not possible to interpret IOA config
1052 * table
1053 */
1054 if (ioasc) {
1055 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
1056 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1057 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1058 pmcraid_reset_alert(cmd);
1059 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1060 } else {
1061 pmcraid_querycfg(cmd);
1062 }
1063}
1064
1065/**
1066 * pmcraid_get_fwversion - reads firmware version information
1067 *
1068 * @cmd: pointer to command block used to send INQUIRY command
1069 *
1070 * Return Value
1071 * none
1072 */
1073static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1074{
1075 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1076 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
1077 struct pmcraid_instance *pinstance = cmd->drv_inst;
1078 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1079
1080 pmcraid_reinit_cmdblk(cmd);
1081 ioarcb->request_type = REQ_TYPE_SCSI;
1082 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1083 ioarcb->cdb[0] = INQUIRY;
1084 ioarcb->cdb[1] = 1;
1085 ioarcb->cdb[2] = 0xD0;
1086 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1087 ioarcb->cdb[4] = data_size & 0xFF;
1088
1089 /* Since entire inquiry data it can be part of IOARCB itself
1090 */
1091 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1092 offsetof(struct pmcraid_ioarcb,
1093 add_data.u.ioadl[0]));
1094 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1095 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
1096
1097 ioarcb->request_flags0 |= NO_LINK_DESCS;
1098 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1099 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1100 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1101 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1102 ioadl->data_len = cpu_to_le32(data_size);
1103
1104 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1105 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1106}
1107
1108/**
1109 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1110 * @cmd: pointer to command block to be used for identify hrrq
1111 *
1112 * Return Value
1113 * none
1114 */
89a36810
AR		 1115static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1116{
1117 struct pmcraid_instance *pinstance = cmd->drv_inst;
1118 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
c20c4267 1119 int index = cmd->hrrq_index;
89a36810
AR		 1120 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1121 u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
c20c4267 1122 void (*done_function)(struct pmcraid_cmd *);
89a36810
AR		 1123
1124 pmcraid_reinit_cmdblk(cmd);
c20c4267
AR		 1125 cmd->hrrq_index = index + 1;
1126
1127 if (cmd->hrrq_index < pinstance->num_hrrq) {
1128 done_function = pmcraid_identify_hrrq;
1129 } else {
1130 cmd->hrrq_index = 0;
1131 done_function = pmcraid_get_fwversion;
1132 }
89a36810
AR		 1133
1134 /* Initialize ioarcb */
1135 ioarcb->request_type = REQ_TYPE_IOACMD;
1136 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1137
1138 /* initialize the hrrq number where IOA will respond to this command */
1139 ioarcb->hrrq_id = index;
1140 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1141 ioarcb->cdb[1] = index;
1142
1143 /* IOA expects 64-bit pci address to be written in B.E format
1144 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1145 */
c20c4267
AR		 1146 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1147 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
89a36810
AR		 1148
1149 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1150 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1151
1152 /* Subsequent commands require HRRQ identification to be successful.
1153 * Note that this gets called even during reset from SCSI mid-layer
1154 * or tasklet
1155 */
c20c4267 1156 pmcraid_send_cmd(cmd, done_function,
89a36810
AR		 1157 PMCRAID_INTERNAL_TIMEOUT,
1158 pmcraid_timeout_handler);
1159}
1160
1161static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1162static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1163
1164/**
1165 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1166 *
1167 * @cmd: initialized command block pointer
1168 *
1169 * Return Value
1170 * none
1171 */
1172static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1173{
1174 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1175 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1176 else
1177 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1178
1179 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1180}
1181
1182/**
1183 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1184 *
1185 * @pinstance: pointer to adapter instance structure
1186 * @type: HCAM type
1187 *
1188 * Return Value
1189 * pointer to initialized pmcraid_cmd structure or NULL
1190 */
1191static struct pmcraid_cmd *pmcraid_init_hcam
1192(
1193 struct pmcraid_instance *pinstance,
1194 u8 type
1195)
1196{
1197 struct pmcraid_cmd *cmd;
1198 struct pmcraid_ioarcb *ioarcb;
1199 struct pmcraid_ioadl_desc *ioadl;
1200 struct pmcraid_hostrcb *hcam;
1201 void (*cmd_done) (struct pmcraid_cmd *);
1202 dma_addr_t dma;
1203 int rcb_size;
1204
1205 cmd = pmcraid_get_free_cmd(pinstance);
1206
1207 if (!cmd) {
1208 pmcraid_err("no free command blocks for hcam\n");
1209 return cmd;
1210 }
1211
1212 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
c20c4267 1213 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
89a36810
AR		 1214 cmd_done = pmcraid_process_ccn;
1215 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1216 hcam = &pinstance->ccn;
1217 } else {
1218 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1219 cmd_done = pmcraid_process_ldn;
1220 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1221 hcam = &pinstance->ldn;
1222 }
1223
1224 /* initialize command pointer used for HCAM registration */
1225 hcam->cmd = cmd;
1226
1227 ioarcb = &cmd->ioa_cb->ioarcb;
1228 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1229 offsetof(struct pmcraid_ioarcb,
1230 add_data.u.ioadl[0]));
1231 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1232 ioadl = ioarcb->add_data.u.ioadl;
1233
1234 /* Initialize ioarcb */
1235 ioarcb->request_type = REQ_TYPE_HCAM;
1236 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1237 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1238 ioarcb->cdb[1] = type;
1239 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1240 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1241
1242 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1243
88197966 1244 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
89a36810
AR		 1245 ioadl[0].data_len = cpu_to_le32(rcb_size);
1246 ioadl[0].address = cpu_to_le32(dma);
1247
1248 cmd->cmd_done = cmd_done;
1249 return cmd;
1250}
1251
1252/**
1253 * pmcraid_send_hcam - Send an HCAM to IOA
1254 * @pinstance: ioa config struct
1255 * @type: HCAM type
1256 *
1257 * This function will send a Host Controlled Async command to IOA.
1258 *
1259 * Return value:
c20c4267 1260 * none
89a36810
AR		 1261 */
1262static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1263{
1264 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1265 pmcraid_send_hcam_cmd(cmd);
1266}
1267
1268
1269/**
1270 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1271 *
1272 * @cmd: pointer to cmd that is used as cancelling command
1273 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1274 */
1275static void pmcraid_prepare_cancel_cmd(
1276 struct pmcraid_cmd *cmd,
1277 struct pmcraid_cmd *cmd_to_cancel
1278)
1279{
1280 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1281 __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
1282
1283 /* Get the resource handle to where the command to be aborted has been
1284 * sent.
1285 */
1286 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1287 ioarcb->request_type = REQ_TYPE_IOACMD;
1288 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1289 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1290
1291 /* IOARCB address of the command to be cancelled is given in
1292 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1293 * IOARCB address are not masked.
1294 */
1295 ioarcb_addr = cpu_to_be64(ioarcb_addr);
1296 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1297}
1298
1299/**
1300 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1301 *
1302 * @cmd: command to be used as cancelling command
1303 * @type: HCAM type
1304 * @cmd_done: op done function for the cancelling command
1305 */
1306static void pmcraid_cancel_hcam(
1307 struct pmcraid_cmd *cmd,
1308 u8 type,
1309 void (*cmd_done) (struct pmcraid_cmd *)
1310)
1311{
1312 struct pmcraid_instance *pinstance;
1313 struct pmcraid_hostrcb *hcam;
1314
1315 pinstance = cmd->drv_inst;
1316 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1317 &pinstance->ldn : &pinstance->ccn;
1318
1319 /* prepare for cancelling previous hcam command. If the HCAM is
1320 * currently not pending with IOA, we would have hcam->cmd as non-null
1321 */
1322 if (hcam->cmd == NULL)
1323 return;
1324
1325 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1326
1327 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1328 * schedule queuecommand while we are doing this
1329 */
1330 pmcraid_send_cmd(cmd, cmd_done,
1331 PMCRAID_INTERNAL_TIMEOUT,
1332 pmcraid_timeout_handler);
1333}
1334
1335/**
1336 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1337 *
1338 * @cmd: command block to be used for cancelling the HCAM
1339 */
1340static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1341{
1342 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1343 cmd->ioa_cb->ioarcb.cdb[0],
1344 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1345
1346 pmcraid_reinit_cmdblk(cmd);
1347
1348 pmcraid_cancel_hcam(cmd,
1349 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1350 pmcraid_ioa_shutdown);
1351}
1352
1353/**
1354 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1355 *
1356 * @cmd: command block to be used for cancelling the HCAM
1357 */
1358static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1359{
1360 pmcraid_cancel_hcam(cmd,
1361 PMCRAID_HCAM_CODE_LOG_DATA,
1362 pmcraid_cancel_ccn);
1363}
1364
1365/**
1366 * pmcraid_expose_resource - check if the resource can be exposed to OS
1367 *
c20c4267 1368 * @fw_version: firmware version code
89a36810
AR		 1369 * @cfgte: pointer to configuration table entry of the resource
1370 *
1371 * Return value:
c20c4267 1372 * true if resource can be added to midlayer, false(0) otherwise
89a36810 1373 */
c20c4267
AR		 1374static int pmcraid_expose_resource(u16 fw_version,
1375 struct pmcraid_config_table_entry *cfgte)
89a36810
AR		 1376{
1377 int retval = 0;
1378
c20c4267
AR		 1379 if (cfgte->resource_type == RES_TYPE_VSET) {
1380 if (fw_version <= PMCRAID_FW_VERSION_1)
1381 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1382 else
1383 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1384 (cfgte->unique_flags1 & 0x80) == 0);
1385
1386 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
89a36810
AR		 1387 retval = (RES_BUS(cfgte->resource_address) !=
1388 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1389 return retval;
1390}
1391
1392/* attributes supported by pmcraid_event_family */
1393enum {
1394 PMCRAID_AEN_ATTR_UNSPEC,
1395 PMCRAID_AEN_ATTR_EVENT,
1396 __PMCRAID_AEN_ATTR_MAX,
1397};
1398#define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1399
1400/* commands supported by pmcraid_event_family */
1401enum {
1402 PMCRAID_AEN_CMD_UNSPEC,
1403 PMCRAID_AEN_CMD_EVENT,
1404 __PMCRAID_AEN_CMD_MAX,
1405};
1406#define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1407
1408static struct genl_family pmcraid_event_family = {
1409 .id = GENL_ID_GENERATE,
1410 .name = "pmcraid",
1411 .version = 1,
1412 .maxattr = PMCRAID_AEN_ATTR_MAX
1413};
1414
1415/**
1416 * pmcraid_netlink_init - registers pmcraid_event_family
1417 *
1418 * Return value:
c20c4267
AR		 1419 * 0 if the pmcraid_event_family is successfully registered
1420 * with netlink generic, non-zero otherwise
89a36810
AR		 1421 */
1422static int pmcraid_netlink_init(void)
1423{
1424 int result;
1425
1426 result = genl_register_family(&pmcraid_event_family);
1427
1428 if (result)
1429 return result;
1430
1431 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1432 pmcraid_event_family.id);
1433
1434 return result;
1435}
1436
1437/**
1438 * pmcraid_netlink_release - unregisters pmcraid_event_family
1439 *
1440 * Return value:
c20c4267 1441 * none
89a36810
AR		 1442 */
1443static void pmcraid_netlink_release(void)
1444{
1445 genl_unregister_family(&pmcraid_event_family);
1446}
1447
1448/**
1449 * pmcraid_notify_aen - sends event msg to user space application
1450 * @pinstance: pointer to adapter instance structure
1451 * @type: HCAM type
1452 *
1453 * Return value:
1454 * 0 if success, error value in case of any failure.
1455 */
c20c4267
AR		 1456static int pmcraid_notify_aen(
1457 struct pmcraid_instance *pinstance,
1458 struct pmcraid_aen_msg *aen_msg,
1459 u32 data_size
1460)
89a36810
AR		 1461{
1462 struct sk_buff *skb;
89a36810 1463 void *msg_header;
c20c4267 1464 u32 total_size, nla_genl_hdr_total_size;
89a36810
AR		 1465 int result;
1466
89a36810
AR		 1467 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1468 MINOR(pinstance->cdev.dev));
1469 aen_msg->length = data_size;
c20c4267 1470
89a36810
AR		 1471 data_size += sizeof(*aen_msg);
1472
1473 total_size = nla_total_size(data_size);
c20c4267
AR		 1474 /* Add GENL_HDR to total_size */
1475 nla_genl_hdr_total_size =
1476 (total_size + (GENL_HDRLEN +
1477 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1478 + NLMSG_HDRLEN);
1479 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
89a36810
AR		 1480
1481
1482 if (!skb) {
1483 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1484 total_size);
1485 return -ENOMEM;
1486 }
1487
1488 /* add the genetlink message header */
1489 msg_header = genlmsg_put(skb, 0, 0,
1490 &pmcraid_event_family, 0,
1491 PMCRAID_AEN_CMD_EVENT);
1492 if (!msg_header) {
1493 pmcraid_err("failed to copy command details\n");
1494 nlmsg_free(skb);
1495 return -ENOMEM;
1496 }
1497
1498 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1499
1500 if (result) {
c20c4267 1501 pmcraid_err("failed to copy AEN attribute data\n");
89a36810
AR		 1502 nlmsg_free(skb);
1503 return -EINVAL;
1504 }
1505
1506 /* send genetlink multicast message to notify appplications */
1507 result = genlmsg_end(skb, msg_header);
1508
1509 if (result < 0) {
1510 pmcraid_err("genlmsg_end failed\n");
1511 nlmsg_free(skb);
1512 return result;
1513 }
1514
1515 result =
1516 genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
1517
1518 /* If there are no listeners, genlmsg_multicast may return non-zero
1519 * value.
1520 */
1521 if (result)
c20c4267 1522 pmcraid_info("error (%x) sending aen event message\n", result);
89a36810
AR		 1523 return result;
1524}
1525
c20c4267
AR		 1526/**
1527 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1528 * @pinstance: pointer adapter instance structure
1529 *
1530 * Return value:
1531 * 0 if success, error value in case of any failure
1532 */
1533static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1534{
1535 return pmcraid_notify_aen(pinstance,
1536 pinstance->ccn.msg,
1537 pinstance->ccn.hcam->data_len +
1538 sizeof(struct pmcraid_hcam_hdr));
1539}
1540
1541/**
1542 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1543 * @pinstance: pointer adapter instance structure
1544 *
1545 * Return value:
1546 * 0 if success, error value in case of any failure
1547 */
1548static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1549{
1550 return pmcraid_notify_aen(pinstance,
1551 pinstance->ldn.msg,
1552 pinstance->ldn.hcam->data_len +
1553 sizeof(struct pmcraid_hcam_hdr));
1554}
1555
1556/**
1557 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1558 * @pinstance: pointer adapter instance structure
1559 * @evt: controller state event to be sent
1560 *
1561 * Return value:
1562 * 0 if success, error value in case of any failure
1563 */
1564static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1565{
1566 pinstance->scn.ioa_state = evt;
1567 pmcraid_notify_aen(pinstance,
1568 &pinstance->scn.msg,
1569 sizeof(u32));
1570}
1571
89a36810
AR		 1572/**
1573 * pmcraid_handle_config_change - Handle a config change from the adapter
1574 * @pinstance: pointer to per adapter instance structure
1575 *
1576 * Return value:
1577 * none
1578 */
729c8456 1579
89a36810
AR		 1580static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1581{
1582 struct pmcraid_config_table_entry *cfg_entry;
1583 struct pmcraid_hcam_ccn *ccn_hcam;
1584 struct pmcraid_cmd *cmd;
1585 struct pmcraid_cmd *cfgcmd;
1586 struct pmcraid_resource_entry *res = NULL;
89a36810
AR		 1587 unsigned long lock_flags;
1588 unsigned long host_lock_flags;
729c8456
AR		 1589 u32 new_entry = 1;
1590 u32 hidden_entry = 0;
c20c4267 1591 u16 fw_version;
89a36810
AR		 1592 int rc;
1593
1594 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1595 cfg_entry = &ccn_hcam->cfg_entry;
c20c4267 1596 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
89a36810 1597
592488a3
AR		 1598 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1599 res: %x:%x:%x:%x\n",
89a36810
AR		 1600 pinstance->ccn.hcam->ilid,
1601 pinstance->ccn.hcam->op_code,
592488a3
AR		 1602 ((pinstance->ccn.hcam->timestamp1) |
1603 ((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
89a36810
AR		 1604 pinstance->ccn.hcam->notification_type,
1605 pinstance->ccn.hcam->notification_lost,
1606 pinstance->ccn.hcam->flags,
1607 pinstance->host->unique_id,
1608 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1609 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1610 RES_BUS(cfg_entry->resource_address)),
c20c4267
AR		 1611 RES_IS_VSET(*cfg_entry) ?
1612 (fw_version <= PMCRAID_FW_VERSION_1 ?
1613 cfg_entry->unique_flags1 :
1614 cfg_entry->array_id & 0xFF) :
89a36810
AR		 1615 RES_TARGET(cfg_entry->resource_address),
1616 RES_LUN(cfg_entry->resource_address));
1617
1618
1619 /* If this HCAM indicates a lost notification, read the config table */
1620 if (pinstance->ccn.hcam->notification_lost) {
1621 cfgcmd = pmcraid_get_free_cmd(pinstance);
1622 if (cfgcmd) {
1623 pmcraid_info("lost CCN, reading config table\b");
1624 pinstance->reinit_cfg_table = 1;
1625 pmcraid_querycfg(cfgcmd);
1626 } else {
1627 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1628 }
1629 goto out_notify_apps;
1630 }
1631
1632 /* If this resource is not going to be added to mid-layer, just notify
729c8456
AR		 1633 * applications and return. If this notification is about hiding a VSET
1634 * resource, check if it was exposed already.
89a36810 1635 */
729c8456
AR		 1636 if (pinstance->ccn.hcam->notification_type ==
1637 NOTIFICATION_TYPE_ENTRY_CHANGED &&
c20c4267
AR		 1638 cfg_entry->resource_type == RES_TYPE_VSET) {
1639
1640 if (fw_version <= PMCRAID_FW_VERSION_1)
1641 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1642 else
1643 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1644
1645 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
89a36810 1646 goto out_notify_apps;
c20c4267 1647 }
89a36810
AR		 1648
1649 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1650 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1651 rc = memcmp(&res->cfg_entry.resource_address,
1652 &cfg_entry->resource_address,
1653 sizeof(cfg_entry->resource_address));
1654 if (!rc) {
1655 new_entry = 0;
1656 break;
1657 }
1658 }
1659
1660 if (new_entry) {
1661
729c8456
AR		 1662 if (hidden_entry) {
1663 spin_unlock_irqrestore(&pinstance->resource_lock,
1664 lock_flags);
1665 goto out_notify_apps;
1666 }
1667
89a36810
AR		 1668 /* If there are more number of resources than what driver can
1669 * manage, do not notify the applications about the CCN. Just
1670 * ignore this notifications and re-register the same HCAM
1671 */
1672 if (list_empty(&pinstance->free_res_q)) {
1673 spin_unlock_irqrestore(&pinstance->resource_lock,
1674 lock_flags);
1675 pmcraid_err("too many resources attached\n");
1676 spin_lock_irqsave(pinstance->host->host_lock,
1677 host_lock_flags);
1678 pmcraid_send_hcam(pinstance,
1679 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1680 spin_unlock_irqrestore(pinstance->host->host_lock,
1681 host_lock_flags);
1682 return;
1683 }
1684
1685 res = list_entry(pinstance->free_res_q.next,
1686 struct pmcraid_resource_entry, queue);
1687
1688 list_del(&res->queue);
1689 res->scsi_dev = NULL;
1690 res->reset_progress = 0;
1691 list_add_tail(&res->queue, &pinstance->used_res_q);
1692 }
1693
c20c4267 1694 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
89a36810
AR		 1695
1696 if (pinstance->ccn.hcam->notification_type ==
729c8456 1697 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
89a36810 1698 if (res->scsi_dev) {
c20c4267
AR		 1699 if (fw_version <= PMCRAID_FW_VERSION_1)
1700 res->cfg_entry.unique_flags1 &= 0x7F;
1701 else
1702 res->cfg_entry.array_id &= 0xFF;
89a36810
AR		 1703 res->change_detected = RES_CHANGE_DEL;
1704 res->cfg_entry.resource_handle =
1705 PMCRAID_INVALID_RES_HANDLE;
1706 schedule_work(&pinstance->worker_q);
1707 } else {
1708 /* This may be one of the non-exposed resources */
1709 list_move_tail(&res->queue, &pinstance->free_res_q);
1710 }
1711 } else if (!res->scsi_dev) {
1712 res->change_detected = RES_CHANGE_ADD;
1713 schedule_work(&pinstance->worker_q);
1714 }
1715 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1716
1717out_notify_apps:
1718
1719 /* Notify configuration changes to registered applications.*/
1720 if (!pmcraid_disable_aen)
c20c4267 1721 pmcraid_notify_ccn(pinstance);
89a36810
AR		 1722
1723 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1724 if (cmd)
1725 pmcraid_send_hcam_cmd(cmd);
1726}
1727
1728/**
1729 * pmcraid_get_error_info - return error string for an ioasc
1730 * @ioasc: ioasc code
1731 * Return Value
1732 * none
1733 */
1734static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1735{
1736 int i;
1737 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1738 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1739 return &pmcraid_ioasc_error_table[i];
1740 }
1741 return NULL;
1742}
1743
1744/**
1745 * pmcraid_ioasc_logger - log IOASC information based user-settings
1746 * @ioasc: ioasc code
1747 * @cmd: pointer to command that resulted in 'ioasc'
1748 */
1749void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1750{
1751 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1752
1753 if (error_info == NULL ||
1754 cmd->drv_inst->current_log_level < error_info->log_level)
1755 return;
1756
1757 /* log the error string */
c20c4267 1758 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
89a36810
AR		 1759 cmd->ioa_cb->ioarcb.cdb[0],
1760 cmd->ioa_cb->ioarcb.resource_handle,
1761 le32_to_cpu(ioasc), error_info->error_string);
1762}
1763
1764/**
1765 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1766 *
1767 * @pinstance: pointer to per adapter instance structure
1768 *
1769 * Return value:
1770 * none
1771 */
1772static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1773{
1774 struct pmcraid_hcam_ldn *hcam_ldn;
1775 u32 ioasc;
1776
1777 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1778
1779 pmcraid_info
1780 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1781 pinstance->ldn.hcam->ilid,
1782 pinstance->ldn.hcam->op_code,
1783 pinstance->ldn.hcam->notification_type,
1784 pinstance->ldn.hcam->notification_lost,
1785 pinstance->ldn.hcam->flags,
1786 pinstance->ldn.hcam->overlay_id);
1787
1788 /* log only the errors, no need to log informational log entries */
1789 if (pinstance->ldn.hcam->notification_type !=
1790 NOTIFICATION_TYPE_ERROR_LOG)
1791 return;
1792
1793 if (pinstance->ldn.hcam->notification_lost ==
1794 HOSTRCB_NOTIFICATIONS_LOST)
34876402 1795 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
89a36810
AR		 1796
1797 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1798
1799 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1800 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
34876402 1801 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1802 "UnitAttention due to IOA Bus Reset\n");
1803 scsi_report_bus_reset(
1804 pinstance->host,
1805 RES_BUS(hcam_ldn->error_log.fd_ra));
1806 }
1807
1808 return;
1809}
1810
1811/**
1812 * pmcraid_process_ccn - Op done function for a CCN.
1813 * @cmd: pointer to command struct
1814 *
1815 * This function is the op done function for a configuration
1816 * change notification
1817 *
1818 * Return value:
1819 * none
1820 */
1821static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1822{
1823 struct pmcraid_instance *pinstance = cmd->drv_inst;
1824 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1825 unsigned long lock_flags;
1826
1827 pinstance->ccn.cmd = NULL;
1828 pmcraid_return_cmd(cmd);
1829
1830 /* If driver initiated IOA reset happened while this hcam was pending
1831 * with IOA, or IOA bringdown sequence is in progress, no need to
1832 * re-register the hcam
1833 */
1834 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1835 atomic_read(&pinstance->ccn.ignore) == 1) {
1836 return;
1837 } else if (ioasc) {
34876402 1838 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1839 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1840 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1841 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1842 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1843 } else {
1844 pmcraid_handle_config_change(pinstance);
1845 }
1846}
1847
1848/**
1849 * pmcraid_process_ldn - op done function for an LDN
1850 * @cmd: pointer to command block
1851 *
1852 * Return value
1853 * none
1854 */
1855static void pmcraid_initiate_reset(struct pmcraid_instance *);
592488a3 1856static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
89a36810
AR		 1857
1858static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1859{
1860 struct pmcraid_instance *pinstance = cmd->drv_inst;
1861 struct pmcraid_hcam_ldn *ldn_hcam =
1862 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1863 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1864 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1865 unsigned long lock_flags;
1866
1867 /* return the command block back to freepool */
1868 pinstance->ldn.cmd = NULL;
1869 pmcraid_return_cmd(cmd);
1870
1871 /* If driver initiated IOA reset happened while this hcam was pending
1872 * with IOA, no need to re-register the hcam as reset engine will do it
1873 * once reset sequence is complete
1874 */
1875 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1876 atomic_read(&pinstance->ccn.ignore) == 1) {
1877 return;
1878 } else if (!ioasc) {
1879 pmcraid_handle_error_log(pinstance);
1880 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1881 spin_lock_irqsave(pinstance->host->host_lock,
1882 lock_flags);
1883 pmcraid_initiate_reset(pinstance);
1884 spin_unlock_irqrestore(pinstance->host->host_lock,
1885 lock_flags);
1886 return;
1887 }
592488a3
AR		 1888 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1889 pinstance->timestamp_error = 1;
1890 pmcraid_set_timestamp(cmd);
1891 }
89a36810 1892 } else {
34876402 1893 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1894 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1895 }
1896 /* send netlink message for HCAM notification if enabled */
1897 if (!pmcraid_disable_aen)
c20c4267 1898 pmcraid_notify_ldn(pinstance);
89a36810
AR		 1899
1900 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1901 if (cmd)
1902 pmcraid_send_hcam_cmd(cmd);
1903}
1904
1905/**
1906 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1907 *
1908 * @pinstance: pointer per adapter instance structure
1909 *
1910 * Return Value
1911 * none
1912 */
1913static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1914{
1915 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1916 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1917}
1918
1919/**
1920 * pmcraid_unregister_hcams - cancel HCAMs registered already
1921 * @cmd: pointer to command used as part of reset sequence
1922 */
1923static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1924{
1925 struct pmcraid_instance *pinstance = cmd->drv_inst;
1926
1927 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1928 * handling hcam response though it is not necessary. In order to
1929 * prevent this, set 'ignore', so that bring-down sequence doesn't
1930 * re-send any more hcams
1931 */
1932 atomic_set(&pinstance->ccn.ignore, 1);
1933 atomic_set(&pinstance->ldn.ignore, 1);
1934
1935 /* If adapter reset was forced as part of runtime reset sequence,
c20c4267
AR		 1936 * start the reset sequence. Reset will be triggered even in case
1937 * IOA unit_check.
89a36810 1938 */
c20c4267
AR		 1939 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1940 pinstance->ioa_unit_check) {
89a36810 1941 pinstance->force_ioa_reset = 0;
c20c4267 1942 pinstance->ioa_unit_check = 0;
89a36810
AR		 1943 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1944 pmcraid_reset_alert(cmd);
1945 return;
1946 }
1947
1948 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1949 * one after the other. So CCN cancellation will be triggered by
1950 * pmcraid_cancel_ldn itself.
1951 */
1952 pmcraid_cancel_ldn(cmd);
1953}
1954
1955/**
1956 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1957 * @pinstance: pointer to adapter instance structure
1958 * Return Value
1959 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1960 */
1961static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1962
1963static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1964{
1965 u32 intrs;
1966
1967 pmcraid_reinit_buffers(pinstance);
1968 intrs = pmcraid_read_interrupts(pinstance);
1969
1970 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1971
1972 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
c20c4267
AR		 1973 if (!pinstance->interrupt_mode) {
1974 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1975 pinstance->int_regs.
1976 ioa_host_interrupt_mask_reg);
1977 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1978 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1979 }
89a36810
AR		 1980 return 1;
1981 } else {
1982 return 0;
1983 }
1984}
1985
1986/**
1987 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1988 * @cmd : pointer to reset command block
1989 *
1990 * Return Value
1991 * none
1992 */
1993static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1994{
1995 struct pmcraid_instance *pinstance = cmd->drv_inst;
1996 u32 int_reg;
1997 u32 doorbell;
1998
1999 /* There will be an interrupt when Transition to Operational bit is
2000 * set so tasklet would execute next reset task. The timeout handler
2001 * would re-initiate a reset
2002 */
2003 cmd->cmd_done = pmcraid_ioa_reset;
2004 cmd->timer.data = (unsigned long)cmd;
2005 cmd->timer.expires = jiffies +
2006 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
2007 cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
2008
2009 if (!timer_pending(&cmd->timer))
2010 add_timer(&cmd->timer);
2011
2012 /* Enable destructive diagnostics on IOA if it is not yet in
2013 * operational state
2014 */
2015 doorbell = DOORBELL_RUNTIME_RESET |
2016 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
2017
c20c4267
AR		 2018 /* Since we do RESET_ALERT and Start BIST we have to again write
2019 * MSIX Doorbell to indicate the interrupt mode
2020 */
2021 if (pinstance->interrupt_mode) {
2022 iowrite32(DOORBELL_INTR_MODE_MSIX,
2023 pinstance->int_regs.host_ioa_interrupt_reg);
2024 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
2025 }
2026
89a36810 2027 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
c20c4267 2028 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
89a36810 2029 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
c20c4267 2030
89a36810
AR		 2031 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2032 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2033 int_reg);
2034}
2035
2036/**
2037 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2038 *
2039 * @pinstance: pointer to adapter instance structure
2040 *
2041 * Return Value
2042 * none
2043 */
2044static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
2045{
2046 pmcraid_info("%s is not yet implemented\n", __func__);
2047}
2048
2049/**
2050 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2051 * @pinstance: pointer to adapter instance structure
2052 *
2053 * This function fails all outstanding ops. If they are submitted to IOA
2054 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2055 * otherwise just completes the commands and returns the cmd blocks to free
2056 * pool.
2057 *
2058 * Return value:
2059 * none
2060 */
2061static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
2062{
2063 struct pmcraid_cmd *cmd, *temp;
2064 unsigned long lock_flags;
2065
2066 /* pending command list is protected by pending_pool_lock. Its
2067 * traversal must be done as within this lock
2068 */
2069 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2070 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
2071 free_list) {
2072 list_del(&cmd->free_list);
2073 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2074 lock_flags);
2075 cmd->ioa_cb->ioasa.ioasc =
2076 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
2077 cmd->ioa_cb->ioasa.ilid =
2078 cpu_to_be32(PMCRAID_DRIVER_ILID);
2079
2080 /* In case the command timer is still running */
2081 del_timer(&cmd->timer);
2082
2083 /* If this is an IO command, complete it by invoking scsi_done
2084 * function. If this is one of the internal commands other
2085 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2086 * complete it
2087 */
2088 if (cmd->scsi_cmd) {
2089
2090 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2091 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2092
2093 scsi_cmd->result |= DID_ERROR << 16;
2094
2095 scsi_dma_unmap(scsi_cmd);
2096 pmcraid_return_cmd(cmd);
2097
89a36810
AR		 2098 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2099 le32_to_cpu(resp) >> 2,
2100 cmd->ioa_cb->ioarcb.cdb[0],
2101 scsi_cmd->result);
2102 scsi_cmd->scsi_done(scsi_cmd);
2103 } else if (cmd->cmd_done == pmcraid_internal_done ||
2104 cmd->cmd_done == pmcraid_erp_done) {
2105 cmd->cmd_done(cmd);
c20c4267
AR		 2106 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2107 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
89a36810
AR		 2108 pmcraid_return_cmd(cmd);
2109 }
2110
2111 atomic_dec(&pinstance->outstanding_cmds);
2112 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2113 }
2114
2115 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2116}
2117
2118/**
2119 * pmcraid_ioa_reset - Implementation of IOA reset logic
2120 *
2121 * @cmd: pointer to the cmd block to be used for entire reset process
2122 *
2123 * This function executes most of the steps required for IOA reset. This gets
2124 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
25985edc 2125 * 'eh_' thread. Access to variables used for controlling the reset sequence is
89a36810
AR		 2126 * synchronized using host lock. Various functions called during reset process
2127 * would make use of a single command block, pointer to which is also stored in
2128 * adapter instance structure.
2129 *
2130 * Return Value
2131 * None
2132 */
2133static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2134{
2135 struct pmcraid_instance *pinstance = cmd->drv_inst;
2136 u8 reset_complete = 0;
2137
2138 pinstance->ioa_reset_in_progress = 1;
2139
2140 if (pinstance->reset_cmd != cmd) {
2141 pmcraid_err("reset is called with different command block\n");
2142 pinstance->reset_cmd = cmd;
2143 }
2144
2145 pmcraid_info("reset_engine: state = %d, command = %p\n",
2146 pinstance->ioa_state, cmd);
2147
2148 switch (pinstance->ioa_state) {
2149
2150 case IOA_STATE_DEAD:
2151 /* If IOA is offline, whatever may be the reset reason, just
2152 * return. callers might be waiting on the reset wait_q, wake
2153 * up them
2154 */
2155 pmcraid_err("IOA is offline no reset is possible\n");
2156 reset_complete = 1;
2157 break;
2158
2159 case IOA_STATE_IN_BRINGDOWN:
2160 /* we enter here, once ioa shutdown command is processed by IOA
2161 * Alert IOA for a possible reset. If reset alert fails, IOA
2162 * goes through hard-reset
2163 */
2164 pmcraid_disable_interrupts(pinstance, ~0);
2165 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2166 pmcraid_reset_alert(cmd);
2167 break;
2168
2169 case IOA_STATE_UNKNOWN:
2170 /* We may be called during probe or resume. Some pre-processing
2171 * is required for prior to reset
2172 */
2173 scsi_block_requests(pinstance->host);
2174
2175 /* If asked to reset while IOA was processing responses or
2176 * there are any error responses then IOA may require
2177 * hard-reset.
2178 */
2179 if (pinstance->ioa_hard_reset == 0) {
2180 if (ioread32(pinstance->ioa_status) &
2181 INTRS_TRANSITION_TO_OPERATIONAL) {
2182 pmcraid_info("sticky bit set, bring-up\n");
2183 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2184 pmcraid_reinit_cmdblk(cmd);
2185 pmcraid_identify_hrrq(cmd);
2186 } else {
2187 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2188 pmcraid_soft_reset(cmd);
2189 }
2190 } else {
2191 /* Alert IOA of a possible reset and wait for critical
2192 * operation in progress bit to reset
2193 */
2194 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2195 pmcraid_reset_alert(cmd);
2196 }
2197 break;
2198
2199 case IOA_STATE_IN_RESET_ALERT:
2200 /* If critical operation in progress bit is reset or wait gets
2201 * timed out, reset proceeds with starting BIST on the IOA.
2202 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2203 * they are 3 or more, reset engine marks IOA dead and returns
2204 */
2205 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2206 pmcraid_start_bist(cmd);
2207 break;
2208
2209 case IOA_STATE_IN_HARD_RESET:
2210 pinstance->ioa_reset_attempts++;
2211
2212 /* retry reset if we haven't reached maximum allowed limit */
2213 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2214 pinstance->ioa_reset_attempts = 0;
2215 pmcraid_err("IOA didn't respond marking it as dead\n");
2216 pinstance->ioa_state = IOA_STATE_DEAD;
c20c4267
AR		 2217
2218 if (pinstance->ioa_bringdown)
2219 pmcraid_notify_ioastate(pinstance,
2220 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2221 else
2222 pmcraid_notify_ioastate(pinstance,
2223 PMC_DEVICE_EVENT_RESET_FAILED);
89a36810
AR		 2224 reset_complete = 1;
2225 break;
2226 }
2227
2228 /* Once either bist or pci reset is done, restore PCI config
2229 * space. If this fails, proceed with hard reset again
2230 */
1d3c16a8 2231 pci_restore_state(pinstance->pdev);
89a36810
AR		 2232
2233 /* fail all pending commands */
2234 pmcraid_fail_outstanding_cmds(pinstance);
2235
2236 /* check if unit check is active, if so extract dump */
2237 if (pinstance->ioa_unit_check) {
2238 pmcraid_info("unit check is active\n");
2239 pinstance->ioa_unit_check = 0;
2240 pmcraid_get_dump(pinstance);
2241 pinstance->ioa_reset_attempts--;
2242 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2243 pmcraid_reset_alert(cmd);
2244 break;
2245 }
2246
2247 /* if the reset reason is to bring-down the ioa, we might be
2248 * done with the reset restore pci_config_space and complete
2249 * the reset
2250 */
2251 if (pinstance->ioa_bringdown) {
2252 pmcraid_info("bringing down the adapter\n");
2253 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2254 pinstance->ioa_bringdown = 0;
2255 pinstance->ioa_state = IOA_STATE_UNKNOWN;
c20c4267
AR		 2256 pmcraid_notify_ioastate(pinstance,
2257 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
89a36810
AR		 2258 reset_complete = 1;
2259 } else {
2260 /* bring-up IOA, so proceed with soft reset
2261 * Reinitialize hrrq_buffers and their indices also
2262 * enable interrupts after a pci_restore_state
2263 */
2264 if (pmcraid_reset_enable_ioa(pinstance)) {
2265 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2266 pmcraid_info("bringing up the adapter\n");
2267 pmcraid_reinit_cmdblk(cmd);
2268 pmcraid_identify_hrrq(cmd);
2269 } else {
2270 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2271 pmcraid_soft_reset(cmd);
2272 }
2273 }
2274 break;
2275
2276 case IOA_STATE_IN_SOFT_RESET:
2277 /* TRANSITION TO OPERATIONAL is on so start initialization
2278 * sequence
2279 */
2280 pmcraid_info("In softreset proceeding with bring-up\n");
2281 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2282
2283 /* Initialization commands start with HRRQ identification. From
2284 * now on tasklet completes most of the commands as IOA is up
2285 * and intrs are enabled
2286 */
2287 pmcraid_identify_hrrq(cmd);
2288 break;
2289
2290 case IOA_STATE_IN_BRINGUP:
2291 /* we are done with bringing up of IOA, change the ioa_state to
2292 * operational and wake up any waiters
2293 */
2294 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2295 reset_complete = 1;
2296 break;
2297
2298 case IOA_STATE_OPERATIONAL:
2299 default:
2300 /* When IOA is operational and a reset is requested, check for
2301 * the reset reason. If reset is to bring down IOA, unregister
2302 * HCAMs and initiate shutdown; if adapter reset is forced then
2303 * restart reset sequence again
2304 */
2305 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2306 pinstance->force_ioa_reset == 0) {
c20c4267
AR		 2307 pmcraid_notify_ioastate(pinstance,
2308 PMC_DEVICE_EVENT_RESET_SUCCESS);
89a36810
AR		 2309 reset_complete = 1;
2310 } else {
2311 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2312 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2313 pmcraid_reinit_cmdblk(cmd);
2314 pmcraid_unregister_hcams(cmd);
2315 }
2316 break;
2317 }
2318
2319 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2320 * OPERATIONAL. Reset all control variables used during reset, wake up
2321 * any waiting threads and let the SCSI mid-layer send commands. Note
2322 * that host_lock must be held before invoking scsi_report_bus_reset.
2323 */
2324 if (reset_complete) {
2325 pinstance->ioa_reset_in_progress = 0;
2326 pinstance->ioa_reset_attempts = 0;
2327 pinstance->reset_cmd = NULL;
2328 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2329 pinstance->ioa_bringdown = 0;
2330 pmcraid_return_cmd(cmd);
2331
2332 /* If target state is to bring up the adapter, proceed with
2333 * hcam registration and resource exposure to mid-layer.
2334 */
2335 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2336 pmcraid_register_hcams(pinstance);
2337
2338 wake_up_all(&pinstance->reset_wait_q);
2339 }
2340
2341 return;
2342}
2343
2344/**
2345 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2346 * ISR/tasklet during error interrupts including IOA unit check. If reset
2347 * is already in progress, it just returns, otherwise initiates IOA reset
2348 * to bring IOA up to operational state.
2349 *
2350 * @pinstance: pointer to adapter instance structure
2351 *
2352 * Return value
2353 * none
2354 */
2355static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2356{
2357 struct pmcraid_cmd *cmd;
2358
2359 /* If the reset is already in progress, just return, otherwise start
2360 * reset sequence and return
2361 */
2362 if (!pinstance->ioa_reset_in_progress) {
2363 scsi_block_requests(pinstance->host);
2364 cmd = pmcraid_get_free_cmd(pinstance);
2365
2366 if (cmd == NULL) {
2367 pmcraid_err("no cmnd blocks for initiate_reset\n");
2368 return;
2369 }
2370
2371 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2372 pinstance->reset_cmd = cmd;
2373 pinstance->force_ioa_reset = 1;
c20c4267
AR		 2374 pmcraid_notify_ioastate(pinstance,
2375 PMC_DEVICE_EVENT_RESET_START);
89a36810
AR		 2376 pmcraid_ioa_reset(cmd);
2377 }
2378}
2379
2380/**
2381 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2382 * or bringdown IOA
2383 * @pinstance: pointer adapter instance structure
2384 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2385 * @target_state: expected target state after reset
2386 *
2387 * Note: This command initiates reset and waits for its completion. Hence this
2388 * should not be called from isr/timer/tasklet functions (timeout handlers,
2389 * error response handlers and interrupt handlers).
2390 *
2391 * Return Value
2392 * 1 in case ioa_state is not target_state, 0 otherwise.
2393 */
2394static int pmcraid_reset_reload(
2395 struct pmcraid_instance *pinstance,
2396 u8 shutdown_type,
2397 u8 target_state
2398)
2399{
2400 struct pmcraid_cmd *reset_cmd = NULL;
2401 unsigned long lock_flags;
2402 int reset = 1;
2403
2404 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2405
2406 if (pinstance->ioa_reset_in_progress) {
2407 pmcraid_info("reset_reload: reset is already in progress\n");
2408
2409 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2410
2411 wait_event(pinstance->reset_wait_q,
2412 !pinstance->ioa_reset_in_progress);
2413
2414 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2415
2416 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2417 spin_unlock_irqrestore(pinstance->host->host_lock,
2418 lock_flags);
2419 pmcraid_info("reset_reload: IOA is dead\n");
2420 return reset;
2421 } else if (pinstance->ioa_state == target_state) {
2422 reset = 0;
2423 }
2424 }
2425
2426 if (reset) {
2427 pmcraid_info("reset_reload: proceeding with reset\n");
2428 scsi_block_requests(pinstance->host);
2429 reset_cmd = pmcraid_get_free_cmd(pinstance);
2430
2431 if (reset_cmd == NULL) {
2432 pmcraid_err("no free cmnd for reset_reload\n");
2433 spin_unlock_irqrestore(pinstance->host->host_lock,
2434 lock_flags);
2435 return reset;
2436 }
2437
2438 if (shutdown_type == SHUTDOWN_NORMAL)
2439 pinstance->ioa_bringdown = 1;
2440
2441 pinstance->ioa_shutdown_type = shutdown_type;
2442 pinstance->reset_cmd = reset_cmd;
2443 pinstance->force_ioa_reset = reset;
2444 pmcraid_info("reset_reload: initiating reset\n");
2445 pmcraid_ioa_reset(reset_cmd);
2446 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2447 pmcraid_info("reset_reload: waiting for reset to complete\n");
2448 wait_event(pinstance->reset_wait_q,
2449 !pinstance->ioa_reset_in_progress);
2450
c20c4267 2451 pmcraid_info("reset_reload: reset is complete !!\n");
89a36810
AR		 2452 scsi_unblock_requests(pinstance->host);
2453 if (pinstance->ioa_state == target_state)
2454 reset = 0;
2455 }
2456
2457 return reset;
2458}
2459
2460/**
2461 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2462 *
2463 * @pinstance: pointer to adapter instance structure
2464 *
2465 * Return Value
2466 * whatever is returned from pmcraid_reset_reload
2467 */
2468static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2469{
2470 return pmcraid_reset_reload(pinstance,
2471 SHUTDOWN_NORMAL,
2472 IOA_STATE_UNKNOWN);
2473}
2474
2475/**
2476 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2477 *
2478 * @pinstance: pointer to adapter instance structure
2479 *
2480 * Return Value
2481 * whatever is returned from pmcraid_reset_reload
2482 */
2483static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2484{
c20c4267
AR		 2485 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2486
89a36810
AR		 2487 return pmcraid_reset_reload(pinstance,
2488 SHUTDOWN_NONE,
2489 IOA_STATE_OPERATIONAL);
2490}
2491
2492/**
2493 * pmcraid_request_sense - Send request sense to a device
2494 * @cmd: pmcraid command struct
2495 *
2496 * This function sends a request sense to a device as a result of a check
2497 * condition. This method re-uses the same command block that failed earlier.
2498 */
2499static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2500{
2501 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2502 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2503
2504 /* allocate DMAable memory for sense buffers */
2505 cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
2506 SCSI_SENSE_BUFFERSIZE,
2507 &cmd->sense_buffer_dma);
2508
2509 if (cmd->sense_buffer == NULL) {
2510 pmcraid_err
2511 ("couldn't allocate sense buffer for request sense\n");
2512 pmcraid_erp_done(cmd);
2513 return;
2514 }
2515
2516 /* re-use the command block */
2517 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2518 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2519 ioarcb->request_flags0 = (SYNC_COMPLETE |
2520 NO_LINK_DESCS |
2521 INHIBIT_UL_CHECK);
2522 ioarcb->request_type = REQ_TYPE_SCSI;
2523 ioarcb->cdb[0] = REQUEST_SENSE;
2524 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2525
2526 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2527 offsetof(struct pmcraid_ioarcb,
2528 add_data.u.ioadl[0]));
2529 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2530
2531 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2532
2533 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2534 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
88197966 2535 ioadl->flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 2536
2537 /* request sense might be called as part of error response processing
2538 * which runs in tasklets context. It is possible that mid-layer might
2539 * schedule queuecommand during this time, hence, writting to IOARRIN
2540 * must be protect by host_lock
2541 */
2542 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2543 PMCRAID_REQUEST_SENSE_TIMEOUT,
2544 pmcraid_timeout_handler);
2545}
2546
2547/**
2548 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2549 * @cmd: command that failed
2550 * @sense: true if request_sense is required after cancel all
2551 *
2552 * This function sends a cancel all to a device to clear the queue.
2553 */
2554static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
2555{
2556 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2557 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2558 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2559 void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
2560 : pmcraid_request_sense;
2561
2562 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2563 ioarcb->request_flags0 = SYNC_OVERRIDE;
2564 ioarcb->request_type = REQ_TYPE_IOACMD;
2565 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2566
2567 if (RES_IS_GSCSI(res->cfg_entry))
2568 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2569
2570 ioarcb->ioadl_bus_addr = 0;
2571 ioarcb->ioadl_length = 0;
2572 ioarcb->data_transfer_length = 0;
2573 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
2574
2575 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2576 * schedule queuecommand while we are doing this
2577 */
2578 pmcraid_send_cmd(cmd, cmd_done,
2579 PMCRAID_REQUEST_SENSE_TIMEOUT,
2580 pmcraid_timeout_handler);
2581}
2582
2583/**
2584 * pmcraid_frame_auto_sense: frame fixed format sense information
2585 *
2586 * @cmd: pointer to failing command block
2587 *
2588 * Return value
2589 * none
2590 */
2591static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2592{
2593 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2594 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2595 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2596 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2597 u32 failing_lba = 0;
2598
2599 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2600 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2601
2602 if (RES_IS_VSET(res->cfg_entry) &&
2603 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2604 ioasa->u.vset.failing_lba_hi != 0) {
2605
2606 sense_buf[0] = 0x72;
2607 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2608 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2609 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2610
2611 sense_buf[7] = 12;
2612 sense_buf[8] = 0;
2613 sense_buf[9] = 0x0A;
2614 sense_buf[10] = 0x80;
2615
2616 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2617
2618 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2619 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2620 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2621 sense_buf[15] = failing_lba & 0x000000ff;
2622
2623 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2624
2625 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2626 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2627 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2628 sense_buf[19] = failing_lba & 0x000000ff;
2629 } else {
2630 sense_buf[0] = 0x70;
2631 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2632 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2633 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2634
2635 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2636 if (RES_IS_VSET(res->cfg_entry))
2637 failing_lba =
2638 le32_to_cpu(ioasa->u.
2639 vset.failing_lba_lo);
2640 sense_buf[0] |= 0x80;
2641 sense_buf[3] = (failing_lba >> 24) & 0xff;
2642 sense_buf[4] = (failing_lba >> 16) & 0xff;
2643 sense_buf[5] = (failing_lba >> 8) & 0xff;
2644 sense_buf[6] = failing_lba & 0xff;
2645 }
2646
2647 sense_buf[7] = 6; /* additional length */
2648 }
2649}
2650
2651/**
2652 * pmcraid_error_handler - Error response handlers for a SCSI op
2653 * @cmd: pointer to pmcraid_cmd that has failed
2654 *
2655 * This function determines whether or not to initiate ERP on the affected
2656 * device. This is called from a tasklet, which doesn't hold any locks.
2657 *
2658 * Return value:
2659 * 0 it caller can complete the request, otherwise 1 where in error
2660 * handler itself completes the request and returns the command block
2661 * back to free-pool
2662 */
2663static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2664{
2665 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2666 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2667 struct pmcraid_instance *pinstance = cmd->drv_inst;
2668 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2669 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2670 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2671 u32 sense_copied = 0;
2672
2673 if (!res) {
2674 pmcraid_info("resource pointer is NULL\n");
2675 return 0;
2676 }
2677
2678 /* If this was a SCSI read/write command keep count of errors */
2679 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2680 atomic_inc(&res->read_failures);
2681 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2682 atomic_inc(&res->write_failures);
2683
2684 if (!RES_IS_GSCSI(res->cfg_entry) &&
2685 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2686 pmcraid_frame_auto_sense(cmd);
2687 }
2688
2689 /* Log IOASC/IOASA information based on user settings */
2690 pmcraid_ioasc_logger(ioasc, cmd);
2691
2692 switch (masked_ioasc) {
2693
2694 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2695 scsi_cmd->result |= (DID_ABORT << 16);
2696 break;
2697
2698 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2699 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2700 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2701 break;
2702
2703 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2704 res->sync_reqd = 1;
2705 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2706 break;
2707
2708 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2709 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2710 break;
2711
2712 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2713 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2714 if (!res->reset_progress)
2715 scsi_report_bus_reset(pinstance->host,
2716 scsi_cmd->device->channel);
2717 scsi_cmd->result |= (DID_ERROR << 16);
2718 break;
2719
2720 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2721 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2722 res->sync_reqd = 1;
2723
2724 /* if check_condition is not active return with error otherwise
2725 * get/frame the sense buffer
2726 */
2727 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2728 SAM_STAT_CHECK_CONDITION &&
2729 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2730 return 0;
2731
2732 /* If we have auto sense data as part of IOASA pass it to
2733 * mid-layer
2734 */
2735 if (ioasa->auto_sense_length != 0) {
2736 short sense_len = ioasa->auto_sense_length;
2737 int data_size = min_t(u16, le16_to_cpu(sense_len),
2738 SCSI_SENSE_BUFFERSIZE);
2739
2740 memcpy(scsi_cmd->sense_buffer,
2741 ioasa->sense_data,
2742 data_size);
2743 sense_copied = 1;
2744 }
2745
a70757ba 2746 if (RES_IS_GSCSI(res->cfg_entry))
89a36810 2747 pmcraid_cancel_all(cmd, sense_copied);
a70757ba 2748 else if (sense_copied)
89a36810 2749 pmcraid_erp_done(cmd);
a70757ba 2750 else
89a36810 2751 pmcraid_request_sense(cmd);
89a36810
AR		 2752
2753 return 1;
2754
2755 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2756 break;
2757
2758 default:
2759 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2760 scsi_cmd->result |= (DID_ERROR << 16);
2761 break;
2762 }
2763 return 0;
2764}
2765
2766/**
2767 * pmcraid_reset_device - device reset handler functions
2768 *
2769 * @scsi_cmd: scsi command struct
2770 * @modifier: reset modifier indicating the reset sequence to be performed
2771 *
2772 * This function issues a device reset to the affected device.
2773 * A LUN reset will be sent to the device first. If that does
2774 * not work, a target reset will be sent.
2775 *
2776 * Return value:
2777 * SUCCESS / FAILED
2778 */
2779static int pmcraid_reset_device(
2780 struct scsi_cmnd *scsi_cmd,
2781 unsigned long timeout,
2782 u8 modifier
2783)
2784{
2785 struct pmcraid_cmd *cmd;
2786 struct pmcraid_instance *pinstance;
2787 struct pmcraid_resource_entry *res;
2788 struct pmcraid_ioarcb *ioarcb;
2789 unsigned long lock_flags;
2790 u32 ioasc;
2791
2792 pinstance =
2793 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2794 res = scsi_cmd->device->hostdata;
2795
2796 if (!res) {
34876402
AR		 2797 sdev_printk(KERN_ERR, scsi_cmd->device,
2798 "reset_device: NULL resource pointer\n");
89a36810
AR		 2799 return FAILED;
2800 }
2801
2802 /* If adapter is currently going through reset/reload, return failed.
2803 * This will force the mid-layer to call _eh_bus/host reset, which
2804 * will then go to sleep and wait for the reset to complete
2805 */
2806 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2807 if (pinstance->ioa_reset_in_progress ||
2808 pinstance->ioa_state == IOA_STATE_DEAD) {
2809 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2810 return FAILED;
2811 }
2812
2813 res->reset_progress = 1;
2814 pmcraid_info("Resetting %s resource with addr %x\n",
2815 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2816 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2817 le32_to_cpu(res->cfg_entry.resource_address));
2818
2819 /* get a free cmd block */
2820 cmd = pmcraid_get_free_cmd(pinstance);
2821
2822 if (cmd == NULL) {
2823 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2824 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2825 return FAILED;
2826 }
2827
2828 ioarcb = &cmd->ioa_cb->ioarcb;
2829 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2830 ioarcb->request_type = REQ_TYPE_IOACMD;
2831 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2832
2833 /* Initialize reset modifier bits */
2834 if (modifier)
2835 modifier = ENABLE_RESET_MODIFIER | modifier;
2836
2837 ioarcb->cdb[1] = modifier;
2838
2839 init_completion(&cmd->wait_for_completion);
2840 cmd->completion_req = 1;
2841
2842 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2843 cmd->ioa_cb->ioarcb.cdb[0],
2844 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2845 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2846
2847 pmcraid_send_cmd(cmd,
2848 pmcraid_internal_done,
2849 timeout,
2850 pmcraid_timeout_handler);
2851
2852 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2853
2854 /* RESET_DEVICE command completes after all pending IOARCBs are
2855 * completed. Once this command is completed, pmcraind_internal_done
2856 * will wake up the 'completion' queue.
2857 */
2858 wait_for_completion(&cmd->wait_for_completion);
2859
2860 /* complete the command here itself and return the command block
2861 * to free list
2862 */
2863 pmcraid_return_cmd(cmd);
2864 res->reset_progress = 0;
2865 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2866
2867 /* set the return value based on the returned ioasc */
2868 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2869}
2870
2871/**
2872 * _pmcraid_io_done - helper for pmcraid_io_done function
2873 *
2874 * @cmd: pointer to pmcraid command struct
2875 * @reslen: residual data length to be set in the ioasa
2876 * @ioasc: ioasc either returned by IOA or set by driver itself.
2877 *
2878 * This function is invoked by pmcraid_io_done to complete mid-layer
2879 * scsi ops.
2880 *
2881 * Return value:
2882 * 0 if caller is required to return it to free_pool. Returns 1 if
2883 * caller need not worry about freeing command block as error handler
2884 * will take care of that.
2885 */
2886
2887static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2888{
2889 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2890 int rc = 0;
2891
2892 scsi_set_resid(scsi_cmd, reslen);
2893
2894 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2895 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2896 cmd->ioa_cb->ioarcb.cdb[0],
2897 ioasc, scsi_cmd->result);
2898
2899 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2900 rc = pmcraid_error_handler(cmd);
2901
2902 if (rc == 0) {
2903 scsi_dma_unmap(scsi_cmd);
2904 scsi_cmd->scsi_done(scsi_cmd);
2905 }
2906
2907 return rc;
2908}
2909
2910/**
2911 * pmcraid_io_done - SCSI completion function
2912 *
2913 * @cmd: pointer to pmcraid command struct
2914 *
2915 * This function is invoked by tasklet/mid-layer error handler to completing
2916 * the SCSI ops sent from mid-layer.
2917 *
2918 * Return value
2919 * none
2920 */
2921
2922static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2923{
2924 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2925 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2926
2927 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2928 pmcraid_return_cmd(cmd);
2929}
2930
2931/**
2932 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2933 *
2934 * @cmd: command block of the command to be aborted
2935 *
2936 * Return Value:
2937 * returns pointer to command structure used as cancelling cmd
2938 */
2939static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2940{
2941 struct pmcraid_cmd *cancel_cmd;
2942 struct pmcraid_instance *pinstance;
2943 struct pmcraid_resource_entry *res;
2944
2945 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2946 res = cmd->scsi_cmd->device->hostdata;
2947
2948 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2949
2950 if (cancel_cmd == NULL) {
2951 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2952 return NULL;
2953 }
2954
2955 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2956
2957 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2958 cmd->ioa_cb->ioarcb.cdb[0],
2959 cmd->ioa_cb->ioarcb.response_handle >> 2);
2960
2961 init_completion(&cancel_cmd->wait_for_completion);
2962 cancel_cmd->completion_req = 1;
2963
2964 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2965 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
c20c4267 2966 cancel_cmd->ioa_cb->ioarcb.cdb[0],
89a36810
AR		 2967 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2968
2969 pmcraid_send_cmd(cancel_cmd,
2970 pmcraid_internal_done,
2971 PMCRAID_INTERNAL_TIMEOUT,
2972 pmcraid_timeout_handler);
2973 return cancel_cmd;
2974}
2975
2976/**
2977 * pmcraid_abort_complete - Waits for ABORT TASK completion
2978 *
2979 * @cancel_cmd: command block use as cancelling command
2980 *
2981 * Return Value:
2982 * returns SUCCESS if ABORT TASK has good completion
2983 * otherwise FAILED
2984 */
2985static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2986{
2987 struct pmcraid_resource_entry *res;
2988 u32 ioasc;
2989
2990 wait_for_completion(&cancel_cmd->wait_for_completion);
c20c4267
AR		 2991 res = cancel_cmd->res;
2992 cancel_cmd->res = NULL;
89a36810
AR		 2993 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2994
2995 /* If the abort task is not timed out we will get a Good completion
2996 * as sense_key, otherwise we may get one the following responses
25985edc 2997 * due to subsequent bus reset or device reset. In case IOASC is
89a36810
AR		 2998 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2999 */
3000 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
3001 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
3002 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
3003 res->sync_reqd = 1;
3004 ioasc = 0;
3005 }
3006
3007 /* complete the command here itself */
3008 pmcraid_return_cmd(cancel_cmd);
3009 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
3010}
3011
3012/**
3013 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3014 *
3015 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3016 * mid-layer ensures that no other commands are queued. This
3017 * never gets called under interrupt, but a separate eh thread.
3018 *
3019 * Return value:
3020 * SUCCESS / FAILED
3021 */
3022static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
3023{
3024 struct pmcraid_instance *pinstance;
3025 struct pmcraid_cmd *cmd;
3026 struct pmcraid_resource_entry *res;
3027 unsigned long host_lock_flags;
3028 unsigned long pending_lock_flags;
3029 struct pmcraid_cmd *cancel_cmd = NULL;
3030 int cmd_found = 0;
3031 int rc = FAILED;
3032
3033 pinstance =
3034 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3035
34876402
AR		 3036 scmd_printk(KERN_INFO, scsi_cmd,
3037 "I/O command timed out, aborting it.\n");
89a36810
AR		 3038
3039 res = scsi_cmd->device->hostdata;
3040
3041 if (res == NULL)
3042 return rc;
3043
3044 /* If we are currently going through reset/reload, return failed.
3045 * This will force the mid-layer to eventually call
3046 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3047 * reset to complete
3048 */
3049 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
3050
3051 if (pinstance->ioa_reset_in_progress ||
3052 pinstance->ioa_state == IOA_STATE_DEAD) {
3053 spin_unlock_irqrestore(pinstance->host->host_lock,
3054 host_lock_flags);
3055 return rc;
3056 }
3057
3058 /* loop over pending cmd list to find cmd corresponding to this
3059 * scsi_cmd. Note that this command might not have been completed
3060 * already. locking: all pending commands are protected with
3061 * pending_pool_lock.
3062 */
3063 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
3064 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
3065
3066 if (cmd->scsi_cmd == scsi_cmd) {
3067 cmd_found = 1;
3068 break;
3069 }
3070 }
3071
3072 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3073 pending_lock_flags);
3074
3075 /* If the command to be aborted was given to IOA and still pending with
3076 * it, send ABORT_TASK to abort this and wait for its completion
3077 */
3078 if (cmd_found)
3079 cancel_cmd = pmcraid_abort_cmd(cmd);
3080
3081 spin_unlock_irqrestore(pinstance->host->host_lock,
3082 host_lock_flags);
3083
3084 if (cancel_cmd) {
c20c4267 3085 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
89a36810
AR		 3086 rc = pmcraid_abort_complete(cancel_cmd);
3087 }
3088
3089 return cmd_found ? rc : SUCCESS;
3090}
3091
3092/**
3093 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3094 *
3095 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3096 *
3097 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3098 * Since these are called from mid-layer EH thread, no other IO will be queued
3099 * to the resource being reset. However, control path (IOCTL) may be active so
3100 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3101 * takes care by locking/unlocking host_lock.
3102 *
3103 * Return value
c20c4267 3104 * SUCCESS or FAILED
89a36810
AR		 3105 */
3106static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3107{
34876402
AR		 3108 scmd_printk(KERN_INFO, scmd,
3109 "resetting device due to an I/O command timeout.\n");
89a36810
AR		 3110 return pmcraid_reset_device(scmd,
3111 PMCRAID_INTERNAL_TIMEOUT,
3112 RESET_DEVICE_LUN);
3113}
3114
3115static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3116{
34876402
AR		 3117 scmd_printk(KERN_INFO, scmd,
3118 "Doing bus reset due to an I/O command timeout.\n");
89a36810
AR		 3119 return pmcraid_reset_device(scmd,
3120 PMCRAID_RESET_BUS_TIMEOUT,
3121 RESET_DEVICE_BUS);
3122}
3123
3124static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3125{
34876402
AR		 3126 scmd_printk(KERN_INFO, scmd,
3127 "Doing target reset due to an I/O command timeout.\n");
89a36810
AR		 3128 return pmcraid_reset_device(scmd,
3129 PMCRAID_INTERNAL_TIMEOUT,
3130 RESET_DEVICE_TARGET);
3131}
3132
3133/**
3134 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3135 *
3136 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3137 *
3138 * Initiates adapter reset to bring it up to operational state
3139 *
3140 * Return value
c20c4267 3141 * SUCCESS or FAILED
89a36810
AR		 3142 */
3143static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3144{
3145 unsigned long interval = 10000; /* 10 seconds interval */
3146 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3147 struct pmcraid_instance *pinstance =
3148 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3149
3150
3151 /* wait for an additional 150 seconds just in case firmware could come
3152 * up and if it could complete all the pending commands excluding the
3153 * two HCAM (CCN and LDN).
3154 */
3155 while (waits--) {
3156 if (atomic_read(&pinstance->outstanding_cmds) <=
3157 PMCRAID_MAX_HCAM_CMD)
3158 return SUCCESS;
3159 msleep(interval);
3160 }
3161
3162 dev_err(&pinstance->pdev->dev,
3163 "Adapter being reset due to an I/O command timeout.\n");
3164 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3165}
3166
3167/**
3168 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3169 * @scsi_cmd: scsi command struct
3170 *
3171 * Return value
3172 * number of tags or 0 if the task is not tagged
3173 */
3174static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
3175{
3176 char tag[2];
3177 u8 rc = 0;
3178
3179 if (scsi_populate_tag_msg(scsi_cmd, tag)) {
3180 switch (tag[0]) {
3181 case MSG_SIMPLE_TAG:
3182 rc = TASK_TAG_SIMPLE;
3183 break;
3184 case MSG_HEAD_TAG:
3185 rc = TASK_TAG_QUEUE_HEAD;
3186 break;
3187 case MSG_ORDERED_TAG:
3188 rc = TASK_TAG_ORDERED;
3189 break;
3190 };
3191 }
3192
3193 return rc;
3194}
3195
3196
3197/**
3198 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3199 * @cmd: pmcraid command struct
3200 * @sgcount: count of scatter-gather elements
3201 *
3202 * Return value
3203 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3204 * or external IOADLs
3205 */
3206struct pmcraid_ioadl_desc *
3207pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3208{
3209 struct pmcraid_ioadl_desc *ioadl;
3210 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3211 int ioadl_count = 0;
3212
3213 if (ioarcb->add_cmd_param_length)
3214 ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
3215 ioarcb->ioadl_length =
3216 sizeof(struct pmcraid_ioadl_desc) * sgcount;
3217
3218 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3219 /* external ioadls start at offset 0x80 from control_block
3220 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3221 * It is necessary to indicate to firmware that driver is
3222 * using ioadls to be treated as external to IOARCB.
3223 */
3224 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
3225 ioarcb->ioadl_bus_addr =
3226 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3227 offsetof(struct pmcraid_ioarcb,
3228 add_data.u.ioadl[3]));
3229 ioadl = &ioarcb->add_data.u.ioadl[3];
3230 } else {
3231 ioarcb->ioadl_bus_addr =
3232 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3233 offsetof(struct pmcraid_ioarcb,
3234 add_data.u.ioadl[ioadl_count]));
3235
3236 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3237 ioarcb->ioarcb_bus_addr |=
3238 DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
3239 }
3240
3241 return ioadl;
3242}
3243
3244/**
3245 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3246 * @pinstance: pointer to adapter instance structure
3247 * @cmd: pmcraid command struct
3248 *
3249 * This function is invoked by queuecommand entry point while sending a command
3250 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3251 *
3252 * Return value:
c20c4267 3253 * 0 on success or -1 on failure
89a36810
AR		 3254 */
3255static int pmcraid_build_ioadl(
3256 struct pmcraid_instance *pinstance,
3257 struct pmcraid_cmd *cmd
3258)
3259{
3260 int i, nseg;
3261 struct scatterlist *sglist;
3262
3263 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3264 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3265 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
3266
3267 u32 length = scsi_bufflen(scsi_cmd);
3268
3269 if (!length)
3270 return 0;
3271
3272 nseg = scsi_dma_map(scsi_cmd);
3273
3274 if (nseg < 0) {
34876402 3275 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
89a36810
AR		 3276 return -1;
3277 } else if (nseg > PMCRAID_MAX_IOADLS) {
3278 scsi_dma_unmap(scsi_cmd);
34876402 3279 scmd_printk(KERN_ERR, scsi_cmd,
89a36810
AR		 3280 "sg count is (%d) more than allowed!\n", nseg);
3281 return -1;
3282 }
3283
3284 /* Initialize IOARCB data transfer length fields */
3285 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3286 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3287
3288 ioarcb->request_flags0 |= NO_LINK_DESCS;
3289 ioarcb->data_transfer_length = cpu_to_le32(length);
3290 ioadl = pmcraid_init_ioadls(cmd, nseg);
3291
3292 /* Initialize IOADL descriptor addresses */
3293 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3294 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3295 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3296 ioadl[i].flags = 0;
3297 }
3298 /* setup last descriptor */
88197966 3299 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 3300
3301 return 0;
3302}
3303
3304/**
3305 * pmcraid_free_sglist - Frees an allocated SG buffer list
3306 * @sglist: scatter/gather list pointer
3307 *
3308 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3309 *
3310 * Return value:
c20c4267 3311 * none
89a36810
AR		 3312 */
3313static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3314{
3315 int i;
3316
3317 for (i = 0; i < sglist->num_sg; i++)
3318 __free_pages(sg_page(&(sglist->scatterlist[i])),
3319 sglist->order);
3320
3321 kfree(sglist);
3322}
3323
3324/**
3325 * pmcraid_alloc_sglist - Allocates memory for a SG list
3326 * @buflen: buffer length
3327 *
3328 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3329 * list.
3330 *
3331 * Return value
c20c4267 3332 * pointer to sglist / NULL on failure
89a36810
AR		 3333 */
3334static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3335{
3336 struct pmcraid_sglist *sglist;
3337 struct scatterlist *scatterlist;
3338 struct page *page;
3339 int num_elem, i, j;
3340 int sg_size;
3341 int order;
3342 int bsize_elem;
3343
3344 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3345 order = (sg_size > 0) ? get_order(sg_size) : 0;
3346 bsize_elem = PAGE_SIZE * (1 << order);
3347
3348 /* Determine the actual number of sg entries needed */
3349 if (buflen % bsize_elem)
3350 num_elem = (buflen / bsize_elem) + 1;
3351 else
3352 num_elem = buflen / bsize_elem;
3353
3354 /* Allocate a scatter/gather list for the DMA */
3355 sglist = kzalloc(sizeof(struct pmcraid_sglist) +
3356 (sizeof(struct scatterlist) * (num_elem - 1)),
3357 GFP_KERNEL);
3358
3359 if (sglist == NULL)
3360 return NULL;
3361
3362 scatterlist = sglist->scatterlist;
3363 sg_init_table(scatterlist, num_elem);
3364 sglist->order = order;
3365 sglist->num_sg = num_elem;
3366 sg_size = buflen;
3367
3368 for (i = 0; i < num_elem; i++) {
592488a3 3369 page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
89a36810
AR		 3370 if (!page) {
3371 for (j = i - 1; j >= 0; j--)
3372 __free_pages(sg_page(&scatterlist[j]), order);
3373 kfree(sglist);
3374 return NULL;
3375 }
3376
3377 sg_set_page(&scatterlist[i], page,
3378 sg_size < bsize_elem ? sg_size : bsize_elem, 0);
3379 sg_size -= bsize_elem;
3380 }
3381
3382 return sglist;
3383}
3384
3385/**
3386 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3387 * @sglist: scatter/gather list pointer
3388 * @buffer: buffer pointer
3389 * @len: buffer length
3390 * @direction: data transfer direction
3391 *
3392 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3393 *
3394 * Return value:
3395 * 0 on success / other on failure
3396 */
3397static int pmcraid_copy_sglist(
3398 struct pmcraid_sglist *sglist,
3399 unsigned long buffer,
3400 u32 len,
3401 int direction
3402)
3403{
3404 struct scatterlist *scatterlist;
3405 void *kaddr;
3406 int bsize_elem;
3407 int i;
3408 int rc = 0;
3409
3410 /* Determine the actual number of bytes per element */
3411 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3412
3413 scatterlist = sglist->scatterlist;
3414
3415 for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3416 struct page *page = sg_page(&scatterlist[i]);
3417
3418 kaddr = kmap(page);
3419 if (direction == DMA_TO_DEVICE)
3420 rc = __copy_from_user(kaddr,
3421 (void *)buffer,
3422 bsize_elem);
3423 else
3424 rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
3425
3426 kunmap(page);
3427
3428 if (rc) {
3429 pmcraid_err("failed to copy user data into sg list\n");
3430 return -EFAULT;
3431 }
3432
3433 scatterlist[i].length = bsize_elem;
3434 }
3435
3436 if (len % bsize_elem) {
3437 struct page *page = sg_page(&scatterlist[i]);
3438
3439 kaddr = kmap(page);
3440
3441 if (direction == DMA_TO_DEVICE)
3442 rc = __copy_from_user(kaddr,
3443 (void *)buffer,
3444 len % bsize_elem);
3445 else
3446 rc = __copy_to_user((void *)buffer,
3447 kaddr,
3448 len % bsize_elem);
3449
3450 kunmap(page);
3451
3452 scatterlist[i].length = len % bsize_elem;
3453 }
3454
3455 if (rc) {
3456 pmcraid_err("failed to copy user data into sg list\n");
3457 rc = -EFAULT;
3458 }
3459
3460 return rc;
3461}
3462
3463/**
3464 * pmcraid_queuecommand - Queue a mid-layer request
3465 * @scsi_cmd: scsi command struct
3466 * @done: done function
3467 *
3468 * This function queues a request generated by the mid-layer. Midlayer calls
3469 * this routine within host->lock. Some of the functions called by queuecommand
3470 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3471 *
3472 * Return value:
3473 * 0 on success
3474 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3475 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3476 */
f281233d 3477static int pmcraid_queuecommand_lck(
89a36810
AR		 3478 struct scsi_cmnd *scsi_cmd,
3479 void (*done) (struct scsi_cmnd *)
3480)
3481{
3482 struct pmcraid_instance *pinstance;
3483 struct pmcraid_resource_entry *res;
3484 struct pmcraid_ioarcb *ioarcb;
3485 struct pmcraid_cmd *cmd;
c20c4267 3486 u32 fw_version;
89a36810
AR		 3487 int rc = 0;
3488
3489 pinstance =
3490 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
c20c4267 3491 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
89a36810
AR		 3492 scsi_cmd->scsi_done = done;
3493 res = scsi_cmd->device->hostdata;
3494 scsi_cmd->result = (DID_OK << 16);
3495
3496 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3497 * the command
3498 */
3499 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3500 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3501 scsi_cmd->result = (DID_NO_CONNECT << 16);
3502 scsi_cmd->scsi_done(scsi_cmd);
3503 return 0;
3504 }
3505
3506 /* If IOA reset is in progress, can't queue the commands */
3507 if (pinstance->ioa_reset_in_progress)
3508 return SCSI_MLQUEUE_HOST_BUSY;
3509
c20c4267
AR		 3510 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3511 * the command here itself with success return
3512 */
3513 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3514 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3515 scsi_cmd->scsi_done(scsi_cmd);
3516 return 0;
3517 }
3518
89a36810
AR		 3519 /* initialize the command and IOARCB to be sent to IOA */
3520 cmd = pmcraid_get_free_cmd(pinstance);
3521
3522 if (cmd == NULL) {
3523 pmcraid_err("free command block is not available\n");
3524 return SCSI_MLQUEUE_HOST_BUSY;
3525 }
3526
3527 cmd->scsi_cmd = scsi_cmd;
3528 ioarcb = &(cmd->ioa_cb->ioarcb);
3529 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3530 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3531 ioarcb->request_type = REQ_TYPE_SCSI;
3532
c20c4267
AR		 3533 /* set hrrq number where the IOA should respond to. Note that all cmds
3534 * generated internally uses hrrq_id 0, exception to this is the cmd
3535 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3536 * hrrq_id assigned here in queuecommand
3537 */
3538 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3539 pinstance->num_hrrq;
89a36810
AR		 3540 cmd->cmd_done = pmcraid_io_done;
3541
3542 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3543 if (scsi_cmd->underflow == 0)
3544 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3545
3546 if (res->sync_reqd) {
3547 ioarcb->request_flags0 |= SYNC_COMPLETE;
3548 res->sync_reqd = 0;
3549 }
3550
3551 ioarcb->request_flags0 |= NO_LINK_DESCS;
3552 ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
3553
3554 if (RES_IS_GSCSI(res->cfg_entry))
3555 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3556 }
3557
3558 rc = pmcraid_build_ioadl(pinstance, cmd);
3559
3560 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3561 le32_to_cpu(ioarcb->response_handle) >> 2,
3562 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3563 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3564 PMCRAID_PHYS_BUS_ID,
3565 RES_IS_VSET(res->cfg_entry) ?
c20c4267
AR		 3566 (fw_version <= PMCRAID_FW_VERSION_1 ?
3567 res->cfg_entry.unique_flags1 :
3568 res->cfg_entry.array_id & 0xFF) :
89a36810
AR		 3569 RES_TARGET(res->cfg_entry.resource_address),
3570 RES_LUN(res->cfg_entry.resource_address));
3571
3572 if (likely(rc == 0)) {
3573 _pmcraid_fire_command(cmd);
3574 } else {
3575 pmcraid_err("queuecommand could not build ioadl\n");
3576 pmcraid_return_cmd(cmd);
3577 rc = SCSI_MLQUEUE_HOST_BUSY;
3578 }
3579
3580 return rc;
3581}
3582
f281233d
JG		 3583static DEF_SCSI_QCMD(pmcraid_queuecommand)
3584
89a36810
AR		 3585/**
3586 * pmcraid_open -char node "open" entry, allowed only users with admin access
3587 */
3588static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3589{
3590 struct pmcraid_instance *pinstance;
3591
3592 if (!capable(CAP_SYS_ADMIN))
3593 return -EACCES;
3594
3595 /* Populate adapter instance * pointer for use by ioctl */
3596 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3597 filep->private_data = pinstance;
3598
3599 return 0;
3600}
3601
3602/**
3603 * pmcraid_release - char node "release" entry point
3604 */
3605static int pmcraid_chr_release(struct inode *inode, struct file *filep)
3606{
660bdddb 3607 struct pmcraid_instance *pinstance = filep->private_data;
89a36810
AR		 3608
3609 filep->private_data = NULL;
3610 fasync_helper(-1, filep, 0, &pinstance->aen_queue);
3611
3612 return 0;
3613}
3614
3615/**
3616 * pmcraid_fasync - Async notifier registration from applications
3617 *
3618 * This function adds the calling process to a driver global queue. When an
3619 * event occurs, SIGIO will be sent to all processes in this queue.
3620 */
3621static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3622{
3623 struct pmcraid_instance *pinstance;
3624 int rc;
3625
660bdddb 3626 pinstance = filep->private_data;
89a36810
AR		 3627 mutex_lock(&pinstance->aen_queue_lock);
3628 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3629 mutex_unlock(&pinstance->aen_queue_lock);
3630
3631 return rc;
3632}
3633
3634
3635/**
3636 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3637 * commands sent over IOCTL interface
3638 *
3639 * @cmd : pointer to struct pmcraid_cmd
3640 * @buflen : length of the request buffer
3641 * @direction : data transfer direction
3642 *
3643 * Return value
af901ca1 3644 * 0 on success, non-zero error code on failure
89a36810
AR		 3645 */
3646static int pmcraid_build_passthrough_ioadls(
3647 struct pmcraid_cmd *cmd,
3648 int buflen,
3649 int direction
3650)
3651{
3652 struct pmcraid_sglist *sglist = NULL;
3653 struct scatterlist *sg = NULL;
3654 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3655 struct pmcraid_ioadl_desc *ioadl;
3656 int i;
3657
3658 sglist = pmcraid_alloc_sglist(buflen);
3659
3660 if (!sglist) {
3661 pmcraid_err("can't allocate memory for passthrough SGls\n");
3662 return -ENOMEM;
3663 }
3664
3665 sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
3666 sglist->scatterlist,
3667 sglist->num_sg, direction);
3668
3669 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3670 dev_err(&cmd->drv_inst->pdev->dev,
3671 "Failed to map passthrough buffer!\n");
3672 pmcraid_free_sglist(sglist);
3673 return -EIO;
3674 }
3675
3676 cmd->sglist = sglist;
3677 ioarcb->request_flags0 |= NO_LINK_DESCS;
3678
3679 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3680
3681 /* Initialize IOADL descriptor addresses */
3682 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3683 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3684 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3685 ioadl[i].flags = 0;
3686 }
3687
3688 /* setup the last descriptor */
88197966 3689 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 3690
3691 return 0;
3692}
3693
3694
3695/**
3696 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3697 *
3698 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3699 * @buflen: size of the request buffer
3700 * @direction: data transfer direction
3701 *
3702 * Return value
af901ca1 3703 * 0 on success, non-zero error code on failure
89a36810
AR		 3704 */
3705static void pmcraid_release_passthrough_ioadls(
3706 struct pmcraid_cmd *cmd,
3707 int buflen,
3708 int direction
3709)
3710{
3711 struct pmcraid_sglist *sglist = cmd->sglist;
3712
3713 if (buflen > 0) {
3714 pci_unmap_sg(cmd->drv_inst->pdev,
3715 sglist->scatterlist,
3716 sglist->num_sg,
3717 direction);
3718 pmcraid_free_sglist(sglist);
3719 cmd->sglist = NULL;
3720 }
3721}
3722
3723/**
3724 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3725 *
3726 * @pinstance: pointer to adapter instance structure
3727 * @cmd: ioctl code
3728 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3729 *
3730 * Return value
af901ca1 3731 * 0 on success, non-zero error code on failure
89a36810
AR		 3732 */
3733static long pmcraid_ioctl_passthrough(
3734 struct pmcraid_instance *pinstance,
3735 unsigned int ioctl_cmd,
3736 unsigned int buflen,
3737 unsigned long arg
3738)
3739{
3740 struct pmcraid_passthrough_ioctl_buffer *buffer;
3741 struct pmcraid_ioarcb *ioarcb;
3742 struct pmcraid_cmd *cmd;
3743 struct pmcraid_cmd *cancel_cmd;
3744 unsigned long request_buffer;
3745 unsigned long request_offset;
3746 unsigned long lock_flags;
592488a3 3747 void *ioasa;
c20c4267 3748 u32 ioasc;
89a36810
AR		 3749 int request_size;
3750 int buffer_size;
3751 u8 access, direction;
3752 int rc = 0;
3753
3754 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3755 if (pinstance->ioa_reset_in_progress) {
3756 rc = wait_event_interruptible_timeout(
3757 pinstance->reset_wait_q,
3758 !pinstance->ioa_reset_in_progress,
3759 msecs_to_jiffies(10000));
3760
3761 if (!rc)
3762 return -ETIMEDOUT;
3763 else if (rc < 0)
3764 return -ERESTARTSYS;
3765 }
3766
3767 /* If adapter is not in operational state, return error */
3768 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3769 pmcraid_err("IOA is not operational\n");
3770 return -ENOTTY;
3771 }
3772
3773 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3774 buffer = kmalloc(buffer_size, GFP_KERNEL);
3775
3776 if (!buffer) {
3777 pmcraid_err("no memory for passthrough buffer\n");
3778 return -ENOMEM;
3779 }
3780
3781 request_offset =
3782 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3783
3784 request_buffer = arg + request_offset;
3785
3786 rc = __copy_from_user(buffer,
3787 (struct pmcraid_passthrough_ioctl_buffer *) arg,
3788 sizeof(struct pmcraid_passthrough_ioctl_buffer));
592488a3
AR		 3789
3790 ioasa =
3791 (void *)(arg +
3792 offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
3793
89a36810
AR		 3794 if (rc) {
3795 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3796 rc = -EFAULT;
3797 goto out_free_buffer;
3798 }
3799
3800 request_size = buffer->ioarcb.data_transfer_length;
3801
3802 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3803 access = VERIFY_READ;
3804 direction = DMA_TO_DEVICE;
3805 } else {
3806 access = VERIFY_WRITE;
3807 direction = DMA_FROM_DEVICE;
3808 }
3809
3810 if (request_size > 0) {
3811 rc = access_ok(access, arg, request_offset + request_size);
3812
3813 if (!rc) {
3814 rc = -EFAULT;
3815 goto out_free_buffer;
3816 }
5f6279da
DR		 3817 } else if (request_size < 0) {
3818 rc = -EINVAL;
3819 goto out_free_buffer;
89a36810
AR		 3820 }
3821
3822 /* check if we have any additional command parameters */
3823 if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
3824 rc = -EINVAL;
3825 goto out_free_buffer;
3826 }
3827
3828 cmd = pmcraid_get_free_cmd(pinstance);
3829
3830 if (!cmd) {
3831 pmcraid_err("free command block is not available\n");
3832 rc = -ENOMEM;
3833 goto out_free_buffer;
3834 }
3835
3836 cmd->scsi_cmd = NULL;
3837 ioarcb = &(cmd->ioa_cb->ioarcb);
3838
3839 /* Copy the user-provided IOARCB stuff field by field */
3840 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3841 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3842 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3843 ioarcb->request_type = buffer->ioarcb.request_type;
3844 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3845 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3846 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3847
3848 if (buffer->ioarcb.add_cmd_param_length) {
3849 ioarcb->add_cmd_param_length =
3850 buffer->ioarcb.add_cmd_param_length;
3851 ioarcb->add_cmd_param_offset =
3852 buffer->ioarcb.add_cmd_param_offset;
3853 memcpy(ioarcb->add_data.u.add_cmd_params,
3854 buffer->ioarcb.add_data.u.add_cmd_params,
3855 buffer->ioarcb.add_cmd_param_length);
3856 }
3857
c20c4267
AR		 3858 /* set hrrq number where the IOA should respond to. Note that all cmds
3859 * generated internally uses hrrq_id 0, exception to this is the cmd
3860 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3861 * hrrq_id assigned here in queuecommand
3862 */
3863 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3864 pinstance->num_hrrq;
3865
89a36810
AR		 3866 if (request_size) {
3867 rc = pmcraid_build_passthrough_ioadls(cmd,
3868 request_size,
3869 direction);
3870 if (rc) {
3871 pmcraid_err("couldn't build passthrough ioadls\n");
3872 goto out_free_buffer;
3873 }
3874 }
3875
3876 /* If data is being written into the device, copy the data from user
3877 * buffers
3878 */
3879 if (direction == DMA_TO_DEVICE && request_size > 0) {
3880 rc = pmcraid_copy_sglist(cmd->sglist,
3881 request_buffer,
3882 request_size,
3883 direction);
3884 if (rc) {
3885 pmcraid_err("failed to copy user buffer\n");
3886 goto out_free_sglist;
3887 }
3888 }
3889
3890 /* passthrough ioctl is a blocking command so, put the user to sleep
3891 * until timeout. Note that a timeout value of 0 means, do timeout.
3892 */
3893 cmd->cmd_done = pmcraid_internal_done;
3894 init_completion(&cmd->wait_for_completion);
3895 cmd->completion_req = 1;
3896
3897 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3898 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3899 cmd->ioa_cb->ioarcb.cdb[0],
3900 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3901
3902 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3903 _pmcraid_fire_command(cmd);
3904 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3905
c20c4267
AR		 3906 /* NOTE ! Remove the below line once abort_task is implemented
3907 * in firmware. This line disables ioctl command timeout handling logic
3908 * similar to IO command timeout handling, making ioctl commands to wait
3909 * until the command completion regardless of timeout value specified in
3910 * ioarcb
3911 */
3912 buffer->ioarcb.cmd_timeout = 0;
3913
89a36810
AR		 3914 /* If command timeout is specified put caller to wait till that time,
3915 * otherwise it would be blocking wait. If command gets timed out, it
3916 * will be aborted.
3917 */
3918 if (buffer->ioarcb.cmd_timeout == 0) {
3919 wait_for_completion(&cmd->wait_for_completion);
3920 } else if (!wait_for_completion_timeout(
3921 &cmd->wait_for_completion,
3922 msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
3923
3924 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3925 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
3926 cmd->ioa_cb->ioarcb.cdb[0]);
3927
89a36810
AR		 3928 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3929 cancel_cmd = pmcraid_abort_cmd(cmd);
3930 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3931
3932 if (cancel_cmd) {
3933 wait_for_completion(&cancel_cmd->wait_for_completion);
c20c4267 3934 ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
89a36810 3935 pmcraid_return_cmd(cancel_cmd);
c20c4267
AR		 3936
3937 /* if abort task couldn't find the command i.e it got
3938 * completed prior to aborting, return good completion.
25985edc 3939 * if command got aborted successfully or there was IOA
c20c4267
AR		 3940 * reset due to abort task itself getting timedout then
3941 * return -ETIMEDOUT
3942 */
3943 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3944 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3945 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3946 rc = -ETIMEDOUT;
3947 goto out_handle_response;
3948 }
89a36810
AR		 3949 }
3950
c20c4267
AR		 3951 /* no command block for abort task or abort task failed to abort
3952 * the IOARCB, then wait for 150 more seconds and initiate reset
3953 * sequence after timeout
3954 */
3955 if (!wait_for_completion_timeout(
3956 &cmd->wait_for_completion,
3957 msecs_to_jiffies(150 * 1000))) {
3958 pmcraid_reset_bringup(cmd->drv_inst);
3959 rc = -ETIMEDOUT;
3960 }
89a36810
AR		 3961 }
3962
c20c4267 3963out_handle_response:
592488a3
AR		 3964 /* copy entire IOASA buffer and return IOCTL success.
3965 * If copying IOASA to user-buffer fails, return
89a36810
AR		 3966 * EFAULT
3967 */
592488a3
AR		 3968 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3969 sizeof(struct pmcraid_ioasa))) {
3970 pmcraid_err("failed to copy ioasa buffer to user\n");
3971 rc = -EFAULT;
89a36810 3972 }
c20c4267 3973
89a36810
AR		 3974 /* If the data transfer was from device, copy the data onto user
3975 * buffers
3976 */
3977 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3978 rc = pmcraid_copy_sglist(cmd->sglist,
3979 request_buffer,
3980 request_size,
3981 direction);
3982 if (rc) {
3983 pmcraid_err("failed to copy user buffer\n");
3984 rc = -EFAULT;
3985 }
3986 }
3987
3988out_free_sglist:
3989 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3990 pmcraid_return_cmd(cmd);
3991
3992out_free_buffer:
3993 kfree(buffer);
3994
3995 return rc;
3996}
3997
3998
3999
4000
4001/**
4002 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
4003 *
4004 * @pinstance: pointer to adapter instance structure
4005 * @cmd: ioctl command passed in
4006 * @buflen: length of user_buffer
4007 * @user_buffer: user buffer pointer
4008 *
4009 * Return Value
4010 * 0 in case of success, otherwise appropriate error code
4011 */
4012static long pmcraid_ioctl_driver(
4013 struct pmcraid_instance *pinstance,
4014 unsigned int cmd,
4015 unsigned int buflen,
4016 void __user *user_buffer
4017)
4018{
4019 int rc = -ENOSYS;
4020
4021 if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
c20c4267 4022 pmcraid_err("ioctl_driver: access fault in request buffer\n");
89a36810
AR		 4023 return -EFAULT;
4024 }
4025
4026 switch (cmd) {
4027 case PMCRAID_IOCTL_RESET_ADAPTER:
4028 pmcraid_reset_bringup(pinstance);
4029 rc = 0;
4030 break;
4031
4032 default:
4033 break;
4034 }
4035
4036 return rc;
4037}
4038
4039/**
4040 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4041 *
4042 * @cmd: ioctl command
4043 * @arg: user buffer
4044 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4045 *
4046 * Return Value
4047 * negetive error code if there are access issues, otherwise zero.
4048 * Upon success, returns ioctl header copied out of user buffer.
4049 */
4050
4051static int pmcraid_check_ioctl_buffer(
4052 int cmd,
4053 void __user *arg,
4054 struct pmcraid_ioctl_header *hdr
4055)
4056{
4057 int rc = 0;
4058 int access = VERIFY_READ;
4059
4060 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
4061 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4062 return -EFAULT;
4063 }
4064
4065 /* check for valid driver signature */
4066 rc = memcmp(hdr->signature,
4067 PMCRAID_IOCTL_SIGNATURE,
4068 sizeof(hdr->signature));
4069 if (rc) {
4070 pmcraid_err("signature verification failed\n");
4071 return -EINVAL;
4072 }
4073
89a36810
AR		 4074 /* check for appropriate buffer access */
4075 if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
4076 access = VERIFY_WRITE;
4077
4078 rc = access_ok(access,
4079 (arg + sizeof(struct pmcraid_ioctl_header)),
4080 hdr->buffer_length);
4081 if (!rc) {
4082 pmcraid_err("access failed for user buffer of size %d\n",
4083 hdr->buffer_length);
4084 return -EFAULT;
4085 }
4086
4087 return 0;
4088}
4089
4090/**
4091 * pmcraid_ioctl - char node ioctl entry point
4092 */
4093static long pmcraid_chr_ioctl(
4094 struct file *filep,
4095 unsigned int cmd,
4096 unsigned long arg
4097)
4098{
4099 struct pmcraid_instance *pinstance = NULL;
4100 struct pmcraid_ioctl_header *hdr = NULL;
4101 int retval = -ENOTTY;
4102
4103 hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header));
4104
4105 if (!hdr) {
4106 pmcraid_err("faile to allocate memory for ioctl header\n");
4107 return -ENOMEM;
4108 }
4109
4110 retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
4111
4112 if (retval) {
4113 pmcraid_info("chr_ioctl: header check failed\n");
4114 kfree(hdr);
4115 return retval;
4116 }
4117
660bdddb 4118 pinstance = filep->private_data;
89a36810
AR		 4119
4120 if (!pinstance) {
4121 pmcraid_info("adapter instance is not found\n");
4122 kfree(hdr);
4123 return -ENOTTY;
4124 }
4125
4126 switch (_IOC_TYPE(cmd)) {
4127
4128 case PMCRAID_PASSTHROUGH_IOCTL:
4129 /* If ioctl code is to download microcode, we need to block
4130 * mid-layer requests.
4131 */
4132 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4133 scsi_block_requests(pinstance->host);
4134
4135 retval = pmcraid_ioctl_passthrough(pinstance,
4136 cmd,
4137 hdr->buffer_length,
4138 arg);
4139
4140 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4141 scsi_unblock_requests(pinstance->host);
4142 break;
4143
4144 case PMCRAID_DRIVER_IOCTL:
4145 arg += sizeof(struct pmcraid_ioctl_header);
4146 retval = pmcraid_ioctl_driver(pinstance,
4147 cmd,
4148 hdr->buffer_length,
4149 (void __user *)arg);
4150 break;
4151
4152 default:
4153 retval = -ENOTTY;
4154 break;
4155 }
4156
4157 kfree(hdr);
4158
4159 return retval;
4160}
4161
4162/**
4163 * File operations structure for management interface
4164 */
4165static const struct file_operations pmcraid_fops = {
4166 .owner = THIS_MODULE,
4167 .open = pmcraid_chr_open,
4168 .release = pmcraid_chr_release,
4169 .fasync = pmcraid_chr_fasync,
4170 .unlocked_ioctl = pmcraid_chr_ioctl,
4171#ifdef CONFIG_COMPAT
4172 .compat_ioctl = pmcraid_chr_ioctl,
4173#endif
6038f373 4174 .llseek = noop_llseek,
89a36810
AR		 4175};
4176
4177
4178
4179
4180/**
4181 * pmcraid_show_log_level - Display adapter's error logging level
4182 * @dev: class device struct
4183 * @buf: buffer
4184 *
4185 * Return value:
4186 * number of bytes printed to buffer
4187 */
4188static ssize_t pmcraid_show_log_level(
4189 struct device *dev,
4190 struct device_attribute *attr,
4191 char *buf)
4192{
4193 struct Scsi_Host *shost = class_to_shost(dev);
4194 struct pmcraid_instance *pinstance =
4195 (struct pmcraid_instance *)shost->hostdata;
4196 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
4197}
4198
4199/**
4200 * pmcraid_store_log_level - Change the adapter's error logging level
4201 * @dev: class device struct
4202 * @buf: buffer
4203 * @count: not used
4204 *
4205 * Return value:
4206 * number of bytes printed to buffer
4207 */
4208static ssize_t pmcraid_store_log_level(
4209 struct device *dev,
4210 struct device_attribute *attr,
4211 const char *buf,
4212 size_t count
4213)
4214{
4215 struct Scsi_Host *shost;
4216 struct pmcraid_instance *pinstance;
4217 unsigned long val;
4218
4219 if (strict_strtoul(buf, 10, &val))
4220 return -EINVAL;
4221 /* log-level should be from 0 to 2 */
4222 if (val > 2)
4223 return -EINVAL;
4224
4225 shost = class_to_shost(dev);
4226 pinstance = (struct pmcraid_instance *)shost->hostdata;
4227 pinstance->current_log_level = val;
4228
4229 return strlen(buf);
4230}
4231
4232static struct device_attribute pmcraid_log_level_attr = {
4233 .attr = {
4234 .name = "log_level",
4235 .mode = S_IRUGO | S_IWUSR,
4236 },
4237 .show = pmcraid_show_log_level,
4238 .store = pmcraid_store_log_level,
4239};
4240
4241/**
4242 * pmcraid_show_drv_version - Display driver version
4243 * @dev: class device struct
4244 * @buf: buffer
4245 *
4246 * Return value:
4247 * number of bytes printed to buffer
4248 */
4249static ssize_t pmcraid_show_drv_version(
4250 struct device *dev,
4251 struct device_attribute *attr,
4252 char *buf
4253)
4254{
4255 return snprintf(buf, PAGE_SIZE, "version: %s, build date: %s\n",
4256 PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
4257}
4258
4259static struct device_attribute pmcraid_driver_version_attr = {
4260 .attr = {
4261 .name = "drv_version",
4262 .mode = S_IRUGO,
4263 },
4264 .show = pmcraid_show_drv_version,
4265};
4266
4267/**
4268 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4269 * @dev: class device struct
4270 * @buf: buffer
4271 *
4272 * Return value:
4273 * number of bytes printed to buffer
4274 */
4275static ssize_t pmcraid_show_adapter_id(
4276 struct device *dev,
4277 struct device_attribute *attr,
4278 char *buf
4279)
4280{
4281 struct Scsi_Host *shost = class_to_shost(dev);
4282 struct pmcraid_instance *pinstance =
4283 (struct pmcraid_instance *)shost->hostdata;
4284 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4285 pinstance->pdev->devfn;
4286 u32 aen_group = pmcraid_event_family.id;
4287
4288 return snprintf(buf, PAGE_SIZE,
4289 "adapter id: %d\nminor: %d\naen group: %d\n",
4290 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4291}
4292
4293static struct device_attribute pmcraid_adapter_id_attr = {
4294 .attr = {
4295 .name = "adapter_id",
4296 .mode = S_IRUGO | S_IWUSR,
4297 },
4298 .show = pmcraid_show_adapter_id,
4299};
4300
4301static struct device_attribute *pmcraid_host_attrs[] = {
4302 &pmcraid_log_level_attr,
4303 &pmcraid_driver_version_attr,
4304 &pmcraid_adapter_id_attr,
4305 NULL,
4306};
4307
4308
4309/* host template structure for pmcraid driver */
4310static struct scsi_host_template pmcraid_host_template = {
4311 .module = THIS_MODULE,
4312 .name = PMCRAID_DRIVER_NAME,
4313 .queuecommand = pmcraid_queuecommand,
4314 .eh_abort_handler = pmcraid_eh_abort_handler,
4315 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4316 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4317 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4318 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4319
4320 .slave_alloc = pmcraid_slave_alloc,
4321 .slave_configure = pmcraid_slave_configure,
4322 .slave_destroy = pmcraid_slave_destroy,
4323 .change_queue_depth = pmcraid_change_queue_depth,
4324 .change_queue_type = pmcraid_change_queue_type,
4325 .can_queue = PMCRAID_MAX_IO_CMD,
4326 .this_id = -1,
4327 .sg_tablesize = PMCRAID_MAX_IOADLS,
4328 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4329 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4330 .use_clustering = ENABLE_CLUSTERING,
4331 .shost_attrs = pmcraid_host_attrs,
4332 .proc_name = PMCRAID_DRIVER_NAME
4333};
4334
c20c4267
AR		 4335/*
4336 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4337 * @irq: interrupt vector number
4338 * @dev_id: pointer hrrq_vector
89a36810
AR		 4339 *
4340 * Return Value
c20c4267 4341 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
89a36810 4342 */
c20c4267
AR		 4343
4344static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
89a36810 4345{
c20c4267
AR		 4346 struct pmcraid_isr_param *hrrq_vector;
4347 struct pmcraid_instance *pinstance;
4348 unsigned long lock_flags;
4349 u32 intrs_val;
4350 int hrrq_id;
4351
4352 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4353 hrrq_id = hrrq_vector->hrrq_id;
4354 pinstance = hrrq_vector->drv_inst;
4355
4356 if (!hrrq_id) {
4357 /* Read the interrupt */
4358 intrs_val = pmcraid_read_interrupts(pinstance);
4359 if (intrs_val &&
4360 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4361 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4362 /* Any error interrupts including unit_check,
4363 * initiate IOA reset.In case of unit check indicate
4364 * to reset_sequence that IOA unit checked and prepare
4365 * for a dump during reset sequence
4366 */
4367 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4368 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4369 pinstance->ioa_unit_check = 1;
4370
4371 pmcraid_err("ISR: error interrupts: %x \
4372 initiating reset\n", intrs_val);
4373 spin_lock_irqsave(pinstance->host->host_lock,
4374 lock_flags);
4375 pmcraid_initiate_reset(pinstance);
4376 spin_unlock_irqrestore(
4377 pinstance->host->host_lock,
4378 lock_flags);
4379 }
4380 /* If interrupt was as part of the ioa initialization,
4381 * clear it. Delete the timer and wakeup the
4382 * reset engine to proceed with reset sequence
4383 */
4384 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4385 pmcraid_clr_trans_op(pinstance);
4386
4387 /* Clear the interrupt register by writing
4388 * to host to ioa doorbell. Once done
4389 * FW will clear the interrupt.
4390 */
4391 iowrite32(DOORBELL_INTR_MSIX_CLR,
4392 pinstance->int_regs.host_ioa_interrupt_reg);
4393 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4394
89a36810 4395
c20c4267
AR		 4396 }
4397 }
4398
4399 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4400
4401 return IRQ_HANDLED;
89a36810
AR		 4402}
4403
4404/**
c20c4267 4405 * pmcraid_isr - implements legacy interrupt handling routine
89a36810
AR		 4406 *
4407 * @irq: interrupt vector number
4408 * @dev_id: pointer hrrq_vector
4409 *
4410 * Return Value
4411 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4412 */
4413static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4414{
4415 struct pmcraid_isr_param *hrrq_vector;
4416 struct pmcraid_instance *pinstance;
89a36810 4417 u32 intrs;
c20c4267
AR		 4418 unsigned long lock_flags;
4419 int hrrq_id = 0;
89a36810
AR		 4420
4421 /* In case of legacy interrupt mode where interrupts are shared across
4422 * isrs, it may be possible that the current interrupt is not from IOA
4423 */
4424 if (!dev_id) {
4425 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4426 return IRQ_NONE;
4427 }
89a36810
AR		 4428 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4429 pinstance = hrrq_vector->drv_inst;
4430
89a36810
AR		 4431 intrs = pmcraid_read_interrupts(pinstance);
4432
c20c4267 4433 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
89a36810 4434 return IRQ_NONE;
89a36810
AR		 4435
4436 /* Any error interrupts including unit_check, initiate IOA reset.
4437 * In case of unit check indicate to reset_sequence that IOA unit
4438 * checked and prepare for a dump during reset sequence
4439 */
4440 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4441
4442 if (intrs & INTRS_IOA_UNIT_CHECK)
4443 pinstance->ioa_unit_check = 1;
4444
4445 iowrite32(intrs,
4446 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4447 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4448 intrs);
c20c4267
AR		 4449 intrs = ioread32(
4450 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4451 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
89a36810 4452 pmcraid_initiate_reset(pinstance);
c20c4267 4453 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
89a36810 4454 } else {
c20c4267
AR		 4455 /* If interrupt was as part of the ioa initialization,
4456 * clear. Delete the timer and wakeup the
4457 * reset engine to proceed with reset sequence
4458 */
4459 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4460 pmcraid_clr_trans_op(pinstance);
4461 } else {
4462 iowrite32(intrs,
4463 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4464 ioread32(
4465 pinstance->int_regs.ioa_host_interrupt_clr_reg);
89a36810 4466
c20c4267
AR		 4467 tasklet_schedule(
4468 &(pinstance->isr_tasklet[hrrq_id]));
4469 }
4470 }
89a36810
AR		 4471
4472 return IRQ_HANDLED;
4473}
4474
4475
4476/**
4477 * pmcraid_worker_function - worker thread function
4478 *
4479 * @workp: pointer to struct work queue
4480 *
4481 * Return Value
4482 * None
4483 */
4484
4485static void pmcraid_worker_function(struct work_struct *workp)
4486{
4487 struct pmcraid_instance *pinstance;
4488 struct pmcraid_resource_entry *res;
4489 struct pmcraid_resource_entry *temp;
4490 struct scsi_device *sdev;
4491 unsigned long lock_flags;
4492 unsigned long host_lock_flags;
c20c4267 4493 u16 fw_version;
89a36810
AR		 4494 u8 bus, target, lun;
4495
4496 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4497 /* add resources only after host is added into system */
4498 if (!atomic_read(&pinstance->expose_resources))
4499 return;
4500
c20c4267
AR		 4501 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4502
89a36810
AR		 4503 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4504 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4505
4506 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4507 sdev = res->scsi_dev;
4508
4509 /* host_lock must be held before calling
4510 * scsi_device_get
4511 */
4512 spin_lock_irqsave(pinstance->host->host_lock,
4513 host_lock_flags);
4514 if (!scsi_device_get(sdev)) {
4515 spin_unlock_irqrestore(
4516 pinstance->host->host_lock,
4517 host_lock_flags);
4518 pmcraid_info("deleting %x from midlayer\n",
4519 res->cfg_entry.resource_address);
4520 list_move_tail(&res->queue,
4521 &pinstance->free_res_q);
4522 spin_unlock_irqrestore(
4523 &pinstance->resource_lock,
4524 lock_flags);
4525 scsi_remove_device(sdev);
4526 scsi_device_put(sdev);
4527 spin_lock_irqsave(&pinstance->resource_lock,
4528 lock_flags);
4529 res->change_detected = 0;
4530 } else {
4531 spin_unlock_irqrestore(
4532 pinstance->host->host_lock,
4533 host_lock_flags);
4534 }
4535 }
4536 }
4537
4538 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4539
4540 if (res->change_detected == RES_CHANGE_ADD) {
4541
c20c4267
AR		 4542 if (!pmcraid_expose_resource(fw_version,
4543 &res->cfg_entry))
89a36810
AR		 4544 continue;
4545
4546 if (RES_IS_VSET(res->cfg_entry)) {
4547 bus = PMCRAID_VSET_BUS_ID;
c20c4267
AR		 4548 if (fw_version <= PMCRAID_FW_VERSION_1)
4549 target = res->cfg_entry.unique_flags1;
4550 else
4551 target = res->cfg_entry.array_id & 0xFF;
89a36810
AR		 4552 lun = PMCRAID_VSET_LUN_ID;
4553 } else {
4554 bus = PMCRAID_PHYS_BUS_ID;
4555 target =
4556 RES_TARGET(
4557 res->cfg_entry.resource_address);
4558 lun = RES_LUN(res->cfg_entry.resource_address);
4559 }
4560
4561 res->change_detected = 0;
4562 spin_unlock_irqrestore(&pinstance->resource_lock,
4563 lock_flags);
4564 scsi_add_device(pinstance->host, bus, target, lun);
4565 spin_lock_irqsave(&pinstance->resource_lock,
4566 lock_flags);
4567 }
4568 }
4569
4570 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4571}
4572
4573/**
4574 * pmcraid_tasklet_function - Tasklet function
4575 *
4576 * @instance: pointer to msix param structure
4577 *
4578 * Return Value
4579 * None
4580 */
c20c4267 4581static void pmcraid_tasklet_function(unsigned long instance)
89a36810
AR		 4582{
4583 struct pmcraid_isr_param *hrrq_vector;
4584 struct pmcraid_instance *pinstance;
4585 unsigned long hrrq_lock_flags;
4586 unsigned long pending_lock_flags;
4587 unsigned long host_lock_flags;
4588 spinlock_t *lockp; /* hrrq buffer lock */
4589 int id;
89a36810
AR		 4590 __le32 resp;
4591
4592 hrrq_vector = (struct pmcraid_isr_param *)instance;
4593 pinstance = hrrq_vector->drv_inst;
4594 id = hrrq_vector->hrrq_id;
4595 lockp = &(pinstance->hrrq_lock[id]);
89a36810
AR		 4596
4597 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4598 * protected by its own lock. Traversals must be done within this lock
4599 * as there may be multiple tasklets running on multiple CPUs. Note
4600 * that the lock is held just for picking up the response handle and
4601 * manipulating hrrq_curr/toggle_bit values.
4602 */
4603 spin_lock_irqsave(lockp, hrrq_lock_flags);
4604
4605 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4606
4607 while ((resp & HRRQ_TOGGLE_BIT) ==
4608 pinstance->host_toggle_bit[id]) {
4609
4610 int cmd_index = resp >> 2;
4611 struct pmcraid_cmd *cmd = NULL;
4612
89a36810
AR		 4613 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4614 pinstance->hrrq_curr[id]++;
4615 } else {
4616 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4617 pinstance->host_toggle_bit[id] ^= 1u;
4618 }
4619
c20c4267
AR		 4620 if (cmd_index >= PMCRAID_MAX_CMD) {
4621 /* In case of invalid response handle, log message */
4622 pmcraid_err("Invalid response handle %d\n", cmd_index);
4623 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4624 continue;
4625 }
4626
4627 cmd = pinstance->cmd_list[cmd_index];
89a36810
AR		 4628 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4629
4630 spin_lock_irqsave(&pinstance->pending_pool_lock,
4631 pending_lock_flags);
4632 list_del(&cmd->free_list);
4633 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4634 pending_lock_flags);
4635 del_timer(&cmd->timer);
4636 atomic_dec(&pinstance->outstanding_cmds);
4637
4638 if (cmd->cmd_done == pmcraid_ioa_reset) {
4639 spin_lock_irqsave(pinstance->host->host_lock,
4640 host_lock_flags);
4641 cmd->cmd_done(cmd);
4642 spin_unlock_irqrestore(pinstance->host->host_lock,
4643 host_lock_flags);
4644 } else if (cmd->cmd_done != NULL) {
4645 cmd->cmd_done(cmd);
4646 }
4647 /* loop over until we are done with all responses */
4648 spin_lock_irqsave(lockp, hrrq_lock_flags);
4649 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4650 }
4651
4652 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4653}
4654
4655/**
4656 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4657 * @pinstance: pointer to adapter instance structure
4658 *
4659 * This routine un-registers registered interrupt handler and
4660 * also frees irqs/vectors.
4661 *
4662 * Retun Value
4663 * None
4664 */
4665static
4666void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4667{
c20c4267
AR		 4668 int i;
4669
4670 for (i = 0; i < pinstance->num_hrrq; i++)
4671 free_irq(pinstance->hrrq_vector[i].vector,
4672 &(pinstance->hrrq_vector[i]));
4673
4674 if (pinstance->interrupt_mode) {
4675 pci_disable_msix(pinstance->pdev);
4676 pinstance->interrupt_mode = 0;
4677 }
89a36810
AR		 4678}
4679
4680/**
4681 * pmcraid_register_interrupt_handler - registers interrupt handler
4682 * @pinstance: pointer to per-adapter instance structure
4683 *
4684 * Return Value
4685 * 0 on success, non-zero error code otherwise.
4686 */
4687static int
4688pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4689{
c20c4267 4690 int rc;
89a36810
AR		 4691 struct pci_dev *pdev = pinstance->pdev;
4692
5da61410
AR		 4693 if ((pmcraid_enable_msix) &&
4694 (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
c20c4267
AR		 4695 int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
4696 struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
4697 int i;
4698 for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
4699 entries[i].entry = i;
4700
4701 rc = pci_enable_msix(pdev, entries, num_hrrq);
4702 if (rc < 0)
4703 goto pmcraid_isr_legacy;
4704
4705 /* Check how many MSIX vectors are allocated and register
4706 * msi-x handlers for each of them giving appropriate buffer
4707 */
4708 if (rc > 0) {
4709 num_hrrq = rc;
4710 if (pci_enable_msix(pdev, entries, num_hrrq))
4711 goto pmcraid_isr_legacy;
4712 }
4713
4714 for (i = 0; i < num_hrrq; i++) {
4715 pinstance->hrrq_vector[i].hrrq_id = i;
4716 pinstance->hrrq_vector[i].drv_inst = pinstance;
4717 pinstance->hrrq_vector[i].vector = entries[i].vector;
4718 rc = request_irq(pinstance->hrrq_vector[i].vector,
4719 pmcraid_isr_msix, 0,
4720 PMCRAID_DRIVER_NAME,
4721 &(pinstance->hrrq_vector[i]));
4722
4723 if (rc) {
4724 int j;
4725 for (j = 0; j < i; j++)
4726 free_irq(entries[j].vector,
4727 &(pinstance->hrrq_vector[j]));
4728 pci_disable_msix(pdev);
4729 goto pmcraid_isr_legacy;
4730 }
4731 }
4732
4733 pinstance->num_hrrq = num_hrrq;
4734 pinstance->interrupt_mode = 1;
4735 iowrite32(DOORBELL_INTR_MODE_MSIX,
4736 pinstance->int_regs.host_ioa_interrupt_reg);
4737 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4738 goto pmcraid_isr_out;
4739 }
4740
4741pmcraid_isr_legacy:
4742 /* If MSI-X registration failed fallback to legacy mode, where
4743 * only one hrrq entry will be used
4744 */
89a36810
AR		 4745 pinstance->hrrq_vector[0].hrrq_id = 0;
4746 pinstance->hrrq_vector[0].drv_inst = pinstance;
c20c4267 4747 pinstance->hrrq_vector[0].vector = pdev->irq;
89a36810 4748 pinstance->num_hrrq = 1;
c20c4267
AR		 4749 rc = 0;
4750
4751 rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
4752 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
4753pmcraid_isr_out:
4754 return rc;
89a36810
AR		 4755}
4756
4757/**
4758 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4759 * @pinstance: per adapter instance structure pointer
4760 * @max_index: number of buffer blocks to release
4761 *
4762 * Return Value
4763 * None
4764 */
4765static void
4766pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4767{
4768 int i;
4769 for (i = 0; i < max_index; i++) {
4770 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4771 pinstance->cmd_list[i] = NULL;
4772 }
4773 kmem_cache_destroy(pinstance->cmd_cachep);
4774 pinstance->cmd_cachep = NULL;
4775}
4776
4777/**
4778 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4779 * @pinstance: pointer to per adapter instance structure
4780 * @max_index: number of buffers (from 0 onwards) to release
4781 *
4782 * This function assumes that the command blocks for which control blocks are
4783 * linked are not released.
4784 *
4785 * Return Value
4786 * None
4787 */
4788static void
4789pmcraid_release_control_blocks(
4790 struct pmcraid_instance *pinstance,
4791 int max_index
4792)
4793{
4794 int i;
4795
4796 if (pinstance->control_pool == NULL)
4797 return;
4798
4799 for (i = 0; i < max_index; i++) {
4800 pci_pool_free(pinstance->control_pool,
4801 pinstance->cmd_list[i]->ioa_cb,
4802 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4803 pinstance->cmd_list[i]->ioa_cb = NULL;
4804 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4805 }
4806 pci_pool_destroy(pinstance->control_pool);
4807 pinstance->control_pool = NULL;
4808}
4809
4810/**
4811 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4812 * @pinstance - pointer to per adapter instance structure
4813 *
4814 * Allocates memory for command blocks using kernel slab allocator.
4815 *
4816 * Return Value
4817 * 0 in case of success; -ENOMEM in case of failure
4818 */
4819static int __devinit
4820pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4821{
4822 int i;
4823
4824 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4825 pinstance->host->unique_id);
4826
4827
4828 pinstance->cmd_cachep = kmem_cache_create(
4829 pinstance->cmd_pool_name,
4830 sizeof(struct pmcraid_cmd), 0,
4831 SLAB_HWCACHE_ALIGN, NULL);
4832 if (!pinstance->cmd_cachep)
4833 return -ENOMEM;
4834
4835 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4836 pinstance->cmd_list[i] =
4837 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4838 if (!pinstance->cmd_list[i]) {
4839 pmcraid_release_cmd_blocks(pinstance, i);
4840 return -ENOMEM;
4841 }
4842 }
4843 return 0;
4844}
4845
4846/**
4847 * pmcraid_allocate_control_blocks - allocates memory control blocks
4848 * @pinstance : pointer to per adapter instance structure
4849 *
4850 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4851 * and IOASAs. This is called after command blocks are already allocated.
4852 *
4853 * Return Value
4854 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4855 */
4856static int __devinit
4857pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4858{
4859 int i;
4860
4861 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4862 pinstance->host->unique_id);
4863
4864 pinstance->control_pool =
4865 pci_pool_create(pinstance->ctl_pool_name,
4866 pinstance->pdev,
4867 sizeof(struct pmcraid_control_block),
4868 PMCRAID_IOARCB_ALIGNMENT, 0);
4869
4870 if (!pinstance->control_pool)
4871 return -ENOMEM;
4872
4873 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4874 pinstance->cmd_list[i]->ioa_cb =
4875 pci_pool_alloc(
4876 pinstance->control_pool,
4877 GFP_KERNEL,
4878 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4879
4880 if (!pinstance->cmd_list[i]->ioa_cb) {
4881 pmcraid_release_control_blocks(pinstance, i);
4882 return -ENOMEM;
4883 }
4884 memset(pinstance->cmd_list[i]->ioa_cb, 0,
4885 sizeof(struct pmcraid_control_block));
4886 }
4887 return 0;
4888}
4889
4890/**
4891 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4892 * @pinstance: pointer to per adapter instance structure
4893 * @maxindex: size of hrrq buffer pointer array
4894 *
4895 * Return Value
4896 * None
4897 */
4898static void
4899pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4900{
4901 int i;
4902 for (i = 0; i < maxindex; i++) {
4903
4904 pci_free_consistent(pinstance->pdev,
4905 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4906 pinstance->hrrq_start[i],
4907 pinstance->hrrq_start_bus_addr[i]);
4908
4909 /* reset pointers and toggle bit to zeros */
4910 pinstance->hrrq_start[i] = NULL;
4911 pinstance->hrrq_start_bus_addr[i] = 0;
4912 pinstance->host_toggle_bit[i] = 0;
4913 }
4914}
4915
4916/**
4917 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4918 * @pinstance: pointer to per adapter instance structure
4919 *
4920 * Return value
4921 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4922 */
4923static int __devinit
4924pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4925{
c20c4267 4926 int i, buffer_size;
89a36810 4927
c20c4267 4928 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
89a36810 4929
c20c4267 4930 for (i = 0; i < pinstance->num_hrrq; i++) {
89a36810
AR		 4931 pinstance->hrrq_start[i] =
4932 pci_alloc_consistent(
4933 pinstance->pdev,
4934 buffer_size,
4935 &(pinstance->hrrq_start_bus_addr[i]));
4936
4937 if (pinstance->hrrq_start[i] == 0) {
c20c4267
AR		 4938 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4939 i);
89a36810
AR		 4940 pmcraid_release_host_rrqs(pinstance, i);
4941 return -ENOMEM;
4942 }
4943
4944 memset(pinstance->hrrq_start[i], 0, buffer_size);
4945 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4946 pinstance->hrrq_end[i] =
c20c4267 4947 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
89a36810
AR		 4948 pinstance->host_toggle_bit[i] = 1;
4949 spin_lock_init(&pinstance->hrrq_lock[i]);
4950 }
4951 return 0;
4952}
4953
4954/**
4955 * pmcraid_release_hcams - release HCAM buffers
4956 *
4957 * @pinstance: pointer to per adapter instance structure
4958 *
4959 * Return value
4960 * none
4961 */
4962static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4963{
4964 if (pinstance->ccn.msg != NULL) {
4965 pci_free_consistent(pinstance->pdev,
4966 PMCRAID_AEN_HDR_SIZE +
c20c4267 4967 sizeof(struct pmcraid_hcam_ccn_ext),
89a36810
AR		 4968 pinstance->ccn.msg,
4969 pinstance->ccn.baddr);
4970
4971 pinstance->ccn.msg = NULL;
4972 pinstance->ccn.hcam = NULL;
4973 pinstance->ccn.baddr = 0;
4974 }
4975
4976 if (pinstance->ldn.msg != NULL) {
4977 pci_free_consistent(pinstance->pdev,
4978 PMCRAID_AEN_HDR_SIZE +
4979 sizeof(struct pmcraid_hcam_ldn),
4980 pinstance->ldn.msg,
4981 pinstance->ldn.baddr);
4982
4983 pinstance->ldn.msg = NULL;
4984 pinstance->ldn.hcam = NULL;
4985 pinstance->ldn.baddr = 0;
4986 }
4987}
4988
4989/**
4990 * pmcraid_allocate_hcams - allocates HCAM buffers
4991 * @pinstance : pointer to per adapter instance structure
4992 *
4993 * Return Value:
4994 * 0 in case of successful allocation, non-zero otherwise
4995 */
4996static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
4997{
4998 pinstance->ccn.msg = pci_alloc_consistent(
4999 pinstance->pdev,
5000 PMCRAID_AEN_HDR_SIZE +
c20c4267 5001 sizeof(struct pmcraid_hcam_ccn_ext),
89a36810
AR		 5002 &(pinstance->ccn.baddr));
5003
5004 pinstance->ldn.msg = pci_alloc_consistent(
5005 pinstance->pdev,
5006 PMCRAID_AEN_HDR_SIZE +
5007 sizeof(struct pmcraid_hcam_ldn),
5008 &(pinstance->ldn.baddr));
5009
5010 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
5011 pmcraid_release_hcams(pinstance);
5012 } else {
5013 pinstance->ccn.hcam =
5014 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
5015 pinstance->ldn.hcam =
5016 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
5017
5018 atomic_set(&pinstance->ccn.ignore, 0);
5019 atomic_set(&pinstance->ldn.ignore, 0);
5020 }
5021
5022 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
5023}
5024
5025/**
5026 * pmcraid_release_config_buffers - release config.table buffers
5027 * @pinstance: pointer to per adapter instance structure
5028 *
5029 * Return Value
5030 * none
5031 */
5032static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
5033{
5034 if (pinstance->cfg_table != NULL &&
5035 pinstance->cfg_table_bus_addr != 0) {
5036 pci_free_consistent(pinstance->pdev,
5037 sizeof(struct pmcraid_config_table),
5038 pinstance->cfg_table,
5039 pinstance->cfg_table_bus_addr);
5040 pinstance->cfg_table = NULL;
5041 pinstance->cfg_table_bus_addr = 0;
5042 }
5043
5044 if (pinstance->res_entries != NULL) {
5045 int i;
5046
5047 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5048 list_del(&pinstance->res_entries[i].queue);
5049 kfree(pinstance->res_entries);
5050 pinstance->res_entries = NULL;
5051 }
5052
5053 pmcraid_release_hcams(pinstance);
5054}
5055
5056/**
5057 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5058 * @pinstance : pointer to per adapter instance structure
5059 *
5060 * Return Value
5061 * 0 for successful allocation, -ENOMEM for any failure
5062 */
5063static int __devinit
5064pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
5065{
5066 int i;
5067
5068 pinstance->res_entries =
5069 kzalloc(sizeof(struct pmcraid_resource_entry) *
5070 PMCRAID_MAX_RESOURCES, GFP_KERNEL);
5071
5072 if (NULL == pinstance->res_entries) {
5073 pmcraid_err("failed to allocate memory for resource table\n");
5074 return -ENOMEM;
5075 }
5076
5077 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5078 list_add_tail(&pinstance->res_entries[i].queue,
5079 &pinstance->free_res_q);
5080
5081 pinstance->cfg_table =
5082 pci_alloc_consistent(pinstance->pdev,
5083 sizeof(struct pmcraid_config_table),
5084 &pinstance->cfg_table_bus_addr);
5085
5086 if (NULL == pinstance->cfg_table) {
5087 pmcraid_err("couldn't alloc DMA memory for config table\n");
5088 pmcraid_release_config_buffers(pinstance);
5089 return -ENOMEM;
5090 }
5091
5092 if (pmcraid_allocate_hcams(pinstance)) {
5093 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5094 pmcraid_release_config_buffers(pinstance);
5095 return -ENOMEM;
5096 }
5097
5098 return 0;
5099}
5100
5101/**
5102 * pmcraid_init_tasklets - registers tasklets for response handling
5103 *
5104 * @pinstance: pointer adapter instance structure
5105 *
5106 * Return value
5107 * none
5108 */
5109static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
5110{
5111 int i;
5112 for (i = 0; i < pinstance->num_hrrq; i++)
5113 tasklet_init(&pinstance->isr_tasklet[i],
5114 pmcraid_tasklet_function,
5115 (unsigned long)&pinstance->hrrq_vector[i]);
5116}
5117
5118/**
5119 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5120 *
5121 * @pinstance: pointer to adapter instance structure
5122 *
5123 * Return value
5124 * none
5125 */
5126static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
5127{
5128 int i;
5129 for (i = 0; i < pinstance->num_hrrq; i++)
5130 tasklet_kill(&pinstance->isr_tasklet[i]);
5131}
5132
c20c4267
AR		 5133/**
5134 * pmcraid_release_buffers - release per-adapter buffers allocated
5135 *
5136 * @pinstance: pointer to adapter soft state
5137 *
5138 * Return Value
5139 * none
5140 */
5141static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
5142{
5143 pmcraid_release_config_buffers(pinstance);
5144 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
5145 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5146 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5147
5148 if (pinstance->inq_data != NULL) {
5149 pci_free_consistent(pinstance->pdev,
5150 sizeof(struct pmcraid_inquiry_data),
5151 pinstance->inq_data,
5152 pinstance->inq_data_baddr);
5153
5154 pinstance->inq_data = NULL;
5155 pinstance->inq_data_baddr = 0;
5156 }
592488a3
AR		 5157
5158 if (pinstance->timestamp_data != NULL) {
5159 pci_free_consistent(pinstance->pdev,
5160 sizeof(struct pmcraid_timestamp_data),
5161 pinstance->timestamp_data,
5162 pinstance->timestamp_data_baddr);
5163
5164 pinstance->timestamp_data = NULL;
5165 pinstance->timestamp_data_baddr = 0;
5166 }
c20c4267
AR		 5167}
5168
89a36810
AR		 5169/**
5170 * pmcraid_init_buffers - allocates memory and initializes various structures
5171 * @pinstance: pointer to per adapter instance structure
5172 *
5173 * This routine pre-allocates memory based on the type of block as below:
5174 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5175 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5176 * config-table entries : DMAable memory using pci_alloc_consistent
5177 * HostRRQs : DMAable memory, using pci_alloc_consistent
5178 *
5179 * Return Value
5180 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5181 */
5182static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
5183{
5184 int i;
5185
5186 if (pmcraid_allocate_host_rrqs(pinstance)) {
5187 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5188 pinstance->num_hrrq);
5189 return -ENOMEM;
5190 }
5191
5192 if (pmcraid_allocate_config_buffers(pinstance)) {
5193 pmcraid_err("couldn't allocate memory for config buffers\n");
5194 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5195 return -ENOMEM;
5196 }
5197
5198 if (pmcraid_allocate_cmd_blocks(pinstance)) {
c20c4267 5199 pmcraid_err("couldn't allocate memory for cmd blocks\n");
89a36810
AR		 5200 pmcraid_release_config_buffers(pinstance);
5201 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5202 return -ENOMEM;
5203 }
5204
5205 if (pmcraid_allocate_control_blocks(pinstance)) {
c20c4267 5206 pmcraid_err("couldn't allocate memory control blocks\n");
89a36810
AR		 5207 pmcraid_release_config_buffers(pinstance);
5208 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5209 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5210 return -ENOMEM;
5211 }
5212
c20c4267
AR		 5213 /* allocate DMAable memory for page D0 INQUIRY buffer */
5214 pinstance->inq_data = pci_alloc_consistent(
5215 pinstance->pdev,
5216 sizeof(struct pmcraid_inquiry_data),
5217 &pinstance->inq_data_baddr);
5218
5219 if (pinstance->inq_data == NULL) {
5220 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5221 pmcraid_release_buffers(pinstance);
5222 return -ENOMEM;
5223 }
5224
592488a3
AR		 5225 /* allocate DMAable memory for set timestamp data buffer */
5226 pinstance->timestamp_data = pci_alloc_consistent(
5227 pinstance->pdev,
5228 sizeof(struct pmcraid_timestamp_data),
5229 &pinstance->timestamp_data_baddr);
5230
5231 if (pinstance->timestamp_data == NULL) {
5232 pmcraid_err("couldn't allocate DMA memory for \
5233 set time_stamp \n");
5234 pmcraid_release_buffers(pinstance);
5235 return -ENOMEM;
5236 }
5237
5238
89a36810
AR		 5239 /* Initialize all the command blocks and add them to free pool. No
5240 * need to lock (free_pool_lock) as this is done in initialization
5241 * itself
5242 */
5243 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5244 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5245 pmcraid_init_cmdblk(cmdp, i);
5246 cmdp->drv_inst = pinstance;
5247 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5248 }
5249
5250 return 0;
5251}
5252
5253/**
5254 * pmcraid_reinit_buffers - resets various buffer pointers
5255 * @pinstance: pointer to adapter instance
5256 * Return value
c20c4267 5257 * none
89a36810
AR		 5258 */
5259static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5260{
5261 int i;
5262 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5263
5264 for (i = 0; i < pinstance->num_hrrq; i++) {
5265 memset(pinstance->hrrq_start[i], 0, buffer_size);
5266 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5267 pinstance->hrrq_end[i] =
5268 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5269 pinstance->host_toggle_bit[i] = 1;
5270 }
5271}
5272
5273/**
5274 * pmcraid_init_instance - initialize per instance data structure
5275 * @pdev: pointer to pci device structure
5276 * @host: pointer to Scsi_Host structure
5277 * @mapped_pci_addr: memory mapped IOA configuration registers
5278 *
5279 * Return Value
5280 * 0 on success, non-zero in case of any failure
5281 */
5282static int __devinit pmcraid_init_instance(
5283 struct pci_dev *pdev,
5284 struct Scsi_Host *host,
5285 void __iomem *mapped_pci_addr
5286)
5287{
5288 struct pmcraid_instance *pinstance =
5289 (struct pmcraid_instance *)host->hostdata;
5290
5291 pinstance->host = host;
5292 pinstance->pdev = pdev;
5293
5294 /* Initialize register addresses */
5295 pinstance->mapped_dma_addr = mapped_pci_addr;
5296
5297 /* Initialize chip-specific details */
5298 {
5299 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5300 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5301
5302 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5303
5304 pint_regs->ioa_host_interrupt_reg =
5305 mapped_pci_addr + chip_cfg->ioa_host_intr;
5306 pint_regs->ioa_host_interrupt_clr_reg =
5307 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
c20c4267
AR		 5308 pint_regs->ioa_host_msix_interrupt_reg =
5309 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
89a36810
AR		 5310 pint_regs->host_ioa_interrupt_reg =
5311 mapped_pci_addr + chip_cfg->host_ioa_intr;
5312 pint_regs->host_ioa_interrupt_clr_reg =
5313 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5314
5315 /* Current version of firmware exposes interrupt mask set
5316 * and mask clr registers through memory mapped bar0.
5317 */
5318 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5319 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5320 pint_regs->ioa_host_interrupt_mask_reg =
5321 mapped_pci_addr + chip_cfg->ioa_host_mask;
5322 pint_regs->ioa_host_interrupt_mask_clr_reg =
5323 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5324 pint_regs->global_interrupt_mask_reg =
5325 mapped_pci_addr + chip_cfg->global_intr_mask;
5326 };
5327
5328 pinstance->ioa_reset_attempts = 0;
5329 init_waitqueue_head(&pinstance->reset_wait_q);
5330
5331 atomic_set(&pinstance->outstanding_cmds, 0);
c20c4267 5332 atomic_set(&pinstance->last_message_id, 0);
89a36810
AR		 5333 atomic_set(&pinstance->expose_resources, 0);
5334
5335 INIT_LIST_HEAD(&pinstance->free_res_q);
5336 INIT_LIST_HEAD(&pinstance->used_res_q);
5337 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5338 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5339
5340 spin_lock_init(&pinstance->free_pool_lock);
5341 spin_lock_init(&pinstance->pending_pool_lock);
5342 spin_lock_init(&pinstance->resource_lock);
5343 mutex_init(&pinstance->aen_queue_lock);
5344
5345 /* Work-queue (Shared) for deferred processing error handling */
5346 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5347
5348 /* Initialize the default log_level */
5349 pinstance->current_log_level = pmcraid_log_level;
5350
5351 /* Setup variables required for reset engine */
5352 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5353 pinstance->reset_cmd = NULL;
5354 return 0;
5355}
5356
89a36810
AR		 5357/**
5358 * pmcraid_shutdown - shutdown adapter controller.
5359 * @pdev: pci device struct
5360 *
5361 * Issues an adapter shutdown to the card waits for its completion
5362 *
5363 * Return value
5364 * none
5365 */
5366static void pmcraid_shutdown(struct pci_dev *pdev)
5367{
5368 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5369 pmcraid_reset_bringdown(pinstance);
5370}
5371
5372
5373/**
5374 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5375 */
5376static unsigned short pmcraid_get_minor(void)
5377{
5378 int minor;
5379
5380 minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
5381 __set_bit(minor, pmcraid_minor);
5382 return minor;
5383}
5384
5385/**
5386 * pmcraid_release_minor - releases given minor back to minor number bitmap
5387 */
5388static void pmcraid_release_minor(unsigned short minor)
5389{
5390 __clear_bit(minor, pmcraid_minor);
5391}
5392
5393/**
5394 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5395 *
5396 * @pinstance: pointer to adapter instance for which to register device
5397 *
5398 * Return value
5399 * 0 in case of success, otherwise non-zero
5400 */
5401static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5402{
5403 int minor;
5404 int error;
5405
5406 minor = pmcraid_get_minor();
5407 cdev_init(&pinstance->cdev, &pmcraid_fops);
5408 pinstance->cdev.owner = THIS_MODULE;
5409
5410 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5411
5412 if (error)
5413 pmcraid_release_minor(minor);
5414 else
5415 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
c20c4267 5416 NULL, "%s%u", PMCRAID_DEVFILE, minor);
89a36810
AR		 5417 return error;
5418}
5419
5420/**
5421 * pmcraid_release_chrdev - unregisters per-adapter management interface
5422 *
5423 * @pinstance: pointer to adapter instance structure
5424 *
5425 * Return value
5426 * none
5427 */
5428static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5429{
5430 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5431 device_destroy(pmcraid_class,
5432 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5433 cdev_del(&pinstance->cdev);
5434}
5435
5436/**
5437 * pmcraid_remove - IOA hot plug remove entry point
5438 * @pdev: pci device struct
5439 *
5440 * Return value
5441 * none
5442 */
5443static void __devexit pmcraid_remove(struct pci_dev *pdev)
5444{
5445 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5446
5447 /* remove the management interface (/dev file) for this device */
5448 pmcraid_release_chrdev(pinstance);
5449
5450 /* remove host template from scsi midlayer */
5451 scsi_remove_host(pinstance->host);
5452
5453 /* block requests from mid-layer */
5454 scsi_block_requests(pinstance->host);
5455
5456 /* initiate shutdown adapter */
5457 pmcraid_shutdown(pdev);
5458
5459 pmcraid_disable_interrupts(pinstance, ~0);
a684b8da 5460 flush_work_sync(&pinstance->worker_q);
89a36810
AR		 5461
5462 pmcraid_kill_tasklets(pinstance);
5463 pmcraid_unregister_interrupt_handler(pinstance);
5464 pmcraid_release_buffers(pinstance);
5465 iounmap(pinstance->mapped_dma_addr);
5466 pci_release_regions(pdev);
5467 scsi_host_put(pinstance->host);
5468 pci_disable_device(pdev);
5469
5470 return;
5471}
5472
5473#ifdef CONFIG_PM
5474/**
5475 * pmcraid_suspend - driver suspend entry point for power management
5476 * @pdev: PCI device structure
5477 * @state: PCI power state to suspend routine
5478 *
5479 * Return Value - 0 always
5480 */
5481static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
5482{
5483 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5484
5485 pmcraid_shutdown(pdev);
5486 pmcraid_disable_interrupts(pinstance, ~0);
5487 pmcraid_kill_tasklets(pinstance);
5488 pci_set_drvdata(pinstance->pdev, pinstance);
5489 pmcraid_unregister_interrupt_handler(pinstance);
5490 pci_save_state(pdev);
5491 pci_disable_device(pdev);
5492 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5493
5494 return 0;
5495}
5496
5497/**
5498 * pmcraid_resume - driver resume entry point PCI power management
5499 * @pdev: PCI device structure
5500 *
5501 * Return Value - 0 in case of success. Error code in case of any failure
5502 */
5503static int pmcraid_resume(struct pci_dev *pdev)
5504{
5505 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5506 struct Scsi_Host *host = pinstance->host;
5507 int rc;
89a36810
AR		 5508
5509 pci_set_power_state(pdev, PCI_D0);
5510 pci_enable_wake(pdev, PCI_D0, 0);
5511 pci_restore_state(pdev);
5512
5513 rc = pci_enable_device(pdev);
5514
5515 if (rc) {
34876402 5516 dev_err(&pdev->dev, "resume: Enable device failed\n");
89a36810
AR		 5517 return rc;
5518 }
5519
5520 pci_set_master(pdev);
5521
5522 if ((sizeof(dma_addr_t) == 4) ||
5523 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5524 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5525
5526 if (rc == 0)
5527 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5528
5529 if (rc != 0) {
34876402 5530 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
89a36810
AR		 5531 goto disable_device;
5532 }
5533
c20c4267 5534 pmcraid_disable_interrupts(pinstance, ~0);
89a36810 5535 atomic_set(&pinstance->outstanding_cmds, 0);
89a36810
AR		 5536 rc = pmcraid_register_interrupt_handler(pinstance);
5537
5538 if (rc) {
34876402
AR		 5539 dev_err(&pdev->dev,
5540 "resume: couldn't register interrupt handlers\n");
89a36810
AR		 5541 rc = -ENODEV;
5542 goto release_host;
5543 }
5544
5545 pmcraid_init_tasklets(pinstance);
5546 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5547
5548 /* Start with hard reset sequence which brings up IOA to operational
5549 * state as well as completes the reset sequence.
5550 */
5551 pinstance->ioa_hard_reset = 1;
5552
5553 /* Start IOA firmware initialization and bring card to Operational
5554 * state.
5555 */
5556 if (pmcraid_reset_bringup(pinstance)) {
c20c4267 5557 dev_err(&pdev->dev, "couldn't initialize IOA\n");
89a36810
AR		 5558 rc = -ENODEV;
5559 goto release_tasklets;
5560 }
5561
5562 return 0;
5563
5564release_tasklets:
c20c4267 5565 pmcraid_disable_interrupts(pinstance, ~0);
89a36810
AR		 5566 pmcraid_kill_tasklets(pinstance);
5567 pmcraid_unregister_interrupt_handler(pinstance);
5568
5569release_host:
5570 scsi_host_put(host);
5571
5572disable_device:
5573 pci_disable_device(pdev);
5574
5575 return rc;
5576}
5577
5578#else
5579
5580#define pmcraid_suspend NULL
5581#define pmcraid_resume NULL
5582
5583#endif /* CONFIG_PM */
5584
5585/**
5586 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
c20c4267 5587 * completion of the ioa reset
89a36810
AR		 5588 * @cmd: pointer to reset command block
5589 */
5590static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5591{
5592 struct pmcraid_instance *pinstance = cmd->drv_inst;
5593 unsigned long flags;
5594
5595 spin_lock_irqsave(pinstance->host->host_lock, flags);
5596 pmcraid_ioa_reset(cmd);
5597 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5598 scsi_unblock_requests(pinstance->host);
5599 schedule_work(&pinstance->worker_q);
5600}
5601
5602/**
5603 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5604 *
5605 * @cmd: pointer to pmcraid_cmd structure
5606 *
5607 * Return Value
5608 * 0 for success or non-zero for failure cases
5609 */
5610static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5611{
5612 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5613 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5614
5615 pmcraid_reinit_cmdblk(cmd);
5616
5617 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5618 ioarcb->request_type = REQ_TYPE_IOACMD;
5619 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5620 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5621
5622 /* If this was called as part of resource table reinitialization due to
5623 * lost CCN, it is enough to return the command block back to free pool
5624 * as part of set_supported_devs completion function.
5625 */
5626 if (cmd->drv_inst->reinit_cfg_table) {
5627 cmd->drv_inst->reinit_cfg_table = 0;
5628 cmd->release = 1;
5629 cmd_done = pmcraid_reinit_cfgtable_done;
5630 }
5631
5632 /* we will be done with the reset sequence after set supported devices,
5633 * setup the done function to return the command block back to free
5634 * pool
5635 */
5636 pmcraid_send_cmd(cmd,
5637 cmd_done,
5638 PMCRAID_SET_SUP_DEV_TIMEOUT,
5639 pmcraid_timeout_handler);
5640 return;
5641}
5642
592488a3
AR		 5643/**
5644 * pmcraid_set_timestamp - set the timestamp to IOAFP
5645 *
5646 * @cmd: pointer to pmcraid_cmd structure
5647 *
5648 * Return Value
5649 * 0 for success or non-zero for failure cases
5650 */
5651static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5652{
5653 struct pmcraid_instance *pinstance = cmd->drv_inst;
5654 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5655 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5656 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5657
5658 struct timeval tv;
5659 __le64 timestamp;
5660
5661 do_gettimeofday(&tv);
5662 timestamp = tv.tv_sec * 1000;
5663
5664 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5665 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5666 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5667 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5668 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5669 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5670
5671 pmcraid_reinit_cmdblk(cmd);
5672 ioarcb->request_type = REQ_TYPE_SCSI;
5673 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5674 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5675 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5676 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5677
5678 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5679 offsetof(struct pmcraid_ioarcb,
5680 add_data.u.ioadl[0]));
5681 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5682 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5683
5684 ioarcb->request_flags0 |= NO_LINK_DESCS;
5685 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5686 ioarcb->data_transfer_length =
5687 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5688 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5689 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5690 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5691 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5692
5693 if (!pinstance->timestamp_error) {
5694 pinstance->timestamp_error = 0;
5695 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5696 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5697 } else {
5698 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5699 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5700 return;
5701 }
5702}
5703
5704
89a36810
AR		 5705/**
5706 * pmcraid_init_res_table - Initialize the resource table
5707 * @cmd: pointer to pmcraid command struct
5708 *
5709 * This function looks through the existing resource table, comparing
5710 * it with the config table. This function will take care of old/new
5711 * devices and schedule adding/removing them from the mid-layer
5712 * as appropriate.
5713 *
5714 * Return value
5715 * None
5716 */
5717static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5718{
5719 struct pmcraid_instance *pinstance = cmd->drv_inst;
5720 struct pmcraid_resource_entry *res, *temp;
5721 struct pmcraid_config_table_entry *cfgte;
5722 unsigned long lock_flags;
5723 int found, rc, i;
c20c4267 5724 u16 fw_version;
89a36810
AR		 5725 LIST_HEAD(old_res);
5726
5727 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
34876402 5728 pmcraid_err("IOA requires microcode download\n");
89a36810 5729
c20c4267
AR		 5730 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5731
89a36810
AR		 5732 /* resource list is protected by pinstance->resource_lock.
5733 * init_res_table can be called from probe (user-thread) or runtime
5734 * reset (timer/tasklet)
5735 */
5736 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5737
5738 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5739 list_move_tail(&res->queue, &old_res);
5740
5741 for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
c20c4267
AR		 5742 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5743 PMCRAID_FW_VERSION_1)
5744 cfgte = &pinstance->cfg_table->entries[i];
5745 else
5746 cfgte = (struct pmcraid_config_table_entry *)
5747 &pinstance->cfg_table->entries_ext[i];
89a36810 5748
c20c4267 5749 if (!pmcraid_expose_resource(fw_version, cfgte))
89a36810
AR		 5750 continue;
5751
5752 found = 0;
5753
5754 /* If this entry was already detected and initialized */
5755 list_for_each_entry_safe(res, temp, &old_res, queue) {
5756
5757 rc = memcmp(&res->cfg_entry.resource_address,
5758 &cfgte->resource_address,
5759 sizeof(cfgte->resource_address));
5760 if (!rc) {
5761 list_move_tail(&res->queue,
5762 &pinstance->used_res_q);
5763 found = 1;
5764 break;
5765 }
5766 }
5767
5768 /* If this is new entry, initialize it and add it the queue */
5769 if (!found) {
5770
5771 if (list_empty(&pinstance->free_res_q)) {
34876402 5772 pmcraid_err("Too many devices attached\n");
89a36810
AR		 5773 break;
5774 }
5775
5776 found = 1;
5777 res = list_entry(pinstance->free_res_q.next,
5778 struct pmcraid_resource_entry, queue);
5779
5780 res->scsi_dev = NULL;
5781 res->change_detected = RES_CHANGE_ADD;
5782 res->reset_progress = 0;
5783 list_move_tail(&res->queue, &pinstance->used_res_q);
5784 }
5785
5786 /* copy new configuration table entry details into driver
5787 * maintained resource entry
5788 */
5789 if (found) {
5790 memcpy(&res->cfg_entry, cfgte,
c20c4267 5791 pinstance->config_table_entry_size);
89a36810
AR		 5792 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5793 res->cfg_entry.resource_type,
c20c4267
AR		 5794 (fw_version <= PMCRAID_FW_VERSION_1 ?
5795 res->cfg_entry.unique_flags1 :
5796 res->cfg_entry.array_id & 0xFF),
89a36810
AR		 5797 le32_to_cpu(res->cfg_entry.resource_address));
5798 }
5799 }
5800
5801 /* Detect any deleted entries, mark them for deletion from mid-layer */
5802 list_for_each_entry_safe(res, temp, &old_res, queue) {
5803
5804 if (res->scsi_dev) {
5805 res->change_detected = RES_CHANGE_DEL;
5806 res->cfg_entry.resource_handle =
5807 PMCRAID_INVALID_RES_HANDLE;
5808 list_move_tail(&res->queue, &pinstance->used_res_q);
5809 } else {
5810 list_move_tail(&res->queue, &pinstance->free_res_q);
5811 }
5812 }
5813
5814 /* release the resource list lock */
5815 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
592488a3 5816 pmcraid_set_timestamp(cmd);
89a36810
AR		 5817}
5818
5819/**
5820 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5821 * @cmd: pointer pmcraid_cmd struct
5822 *
5823 * This function sends a Query IOA Configuration command to the adapter to
5824 * retrieve the IOA configuration table.
5825 *
5826 * Return value:
5827 * none
5828 */
5829static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5830{
5831 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5832 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5833 struct pmcraid_instance *pinstance = cmd->drv_inst;
5834 int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5835
c20c4267
AR		 5836 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5837 PMCRAID_FW_VERSION_1)
5838 pinstance->config_table_entry_size =
5839 sizeof(struct pmcraid_config_table_entry);
5840 else
5841 pinstance->config_table_entry_size =
5842 sizeof(struct pmcraid_config_table_entry_ext);
5843
89a36810
AR		 5844 ioarcb->request_type = REQ_TYPE_IOACMD;
5845 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5846
5847 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5848
5849 /* firmware requires 4-byte length field, specified in B.E format */
5850 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5851
5852 /* Since entire config table can be described by single IOADL, it can
5853 * be part of IOARCB itself
5854 */
5855 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5856 offsetof(struct pmcraid_ioarcb,
5857 add_data.u.ioadl[0]));
5858 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5859 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5860
5861 ioarcb->request_flags0 |= NO_LINK_DESCS;
5862 ioarcb->data_transfer_length =
5863 cpu_to_le32(sizeof(struct pmcraid_config_table));
5864
5865 ioadl = &(ioarcb->add_data.u.ioadl[0]);
88197966 5866 ioadl->flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 5867 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5868 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5869
5870 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5871 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5872}
5873
5874
5875/**
c20c4267 5876 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
89a36810
AR		 5877 * @pdev: pointer to pci device structure
5878 * @dev_id: pointer to device ids structure
5879 *
5880 * Return Value
5881 * returns 0 if the device is claimed and successfully configured.
5882 * returns non-zero error code in case of any failure
5883 */
5884static int __devinit pmcraid_probe(
5885 struct pci_dev *pdev,
5886 const struct pci_device_id *dev_id
5887)
5888{
5889 struct pmcraid_instance *pinstance;
5890 struct Scsi_Host *host;
5891 void __iomem *mapped_pci_addr;
5892 int rc = PCIBIOS_SUCCESSFUL;
5893
5894 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5895 pmcraid_err
5896 ("maximum number(%d) of supported adapters reached\n",
5897 atomic_read(&pmcraid_adapter_count));
5898 return -ENOMEM;
5899 }
5900
5901 atomic_inc(&pmcraid_adapter_count);
5902 rc = pci_enable_device(pdev);
5903
5904 if (rc) {
5905 dev_err(&pdev->dev, "Cannot enable adapter\n");
5906 atomic_dec(&pmcraid_adapter_count);
5907 return rc;
5908 }
5909
5910 dev_info(&pdev->dev,
5911 "Found new IOA(%x:%x), Total IOA count: %d\n",
5912 pdev->vendor, pdev->device,
5913 atomic_read(&pmcraid_adapter_count));
5914
5915 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5916
5917 if (rc < 0) {
5918 dev_err(&pdev->dev,
5919 "Couldn't register memory range of registers\n");
5920 goto out_disable_device;
5921 }
5922
5923 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5924
5925 if (!mapped_pci_addr) {
5926 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5927 rc = -ENOMEM;
5928 goto out_release_regions;
5929 }
5930
5931 pci_set_master(pdev);
5932
5933 /* Firmware requires the system bus address of IOARCB to be within
5934 * 32-bit addressable range though it has 64-bit IOARRIN register.
5935 * However, firmware supports 64-bit streaming DMA buffers, whereas
5936 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5937 * returns memory within 4GB (if not, change this logic), coherent
25985edc 5938 * buffers are within firmware acceptable address ranges.
89a36810
AR		 5939 */
5940 if ((sizeof(dma_addr_t) == 4) ||
5941 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5942 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5943
5944 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5945 * bit mask for pci_alloc_consistent to return addresses within 4GB
5946 */
5947 if (rc == 0)
5948 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5949
5950 if (rc != 0) {
5951 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5952 goto cleanup_nomem;
5953 }
5954
5955 host = scsi_host_alloc(&pmcraid_host_template,
5956 sizeof(struct pmcraid_instance));
5957
5958 if (!host) {
5959 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5960 rc = -ENOMEM;
5961 goto cleanup_nomem;
5962 }
5963
5964 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5965 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5966 host->unique_id = host->host_no;
5967 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5968 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5969
5970 /* zero out entire instance structure */
5971 pinstance = (struct pmcraid_instance *)host->hostdata;
5972 memset(pinstance, 0, sizeof(*pinstance));
5973
5974 pinstance->chip_cfg =
5975 (struct pmcraid_chip_details *)(dev_id->driver_data);
5976
5977 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5978
5979 if (rc < 0) {
5980 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5981 goto out_scsi_host_put;
5982 }
5983
5984 pci_set_drvdata(pdev, pinstance);
5985
5986 /* Save PCI config-space for use following the reset */
5987 rc = pci_save_state(pinstance->pdev);
5988
5989 if (rc != 0) {
5990 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5991 goto out_scsi_host_put;
5992 }
5993
5994 pmcraid_disable_interrupts(pinstance, ~0);
5995
5996 rc = pmcraid_register_interrupt_handler(pinstance);
5997
5998 if (rc) {
34876402 5999 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
89a36810
AR		 6000 goto out_scsi_host_put;
6001 }
6002
6003 pmcraid_init_tasklets(pinstance);
6004
6005 /* allocate verious buffers used by LLD.*/
6006 rc = pmcraid_init_buffers(pinstance);
6007
6008 if (rc) {
6009 pmcraid_err("couldn't allocate memory blocks\n");
6010 goto out_unregister_isr;
6011 }
6012
6013 /* check the reset type required */
6014 pmcraid_reset_type(pinstance);
6015
6016 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
6017
6018 /* Start IOA firmware initialization and bring card to Operational
6019 * state.
6020 */
6021 pmcraid_info("starting IOA initialization sequence\n");
6022 if (pmcraid_reset_bringup(pinstance)) {
c20c4267 6023 dev_err(&pdev->dev, "couldn't initialize IOA\n");
89a36810
AR		 6024 rc = 1;
6025 goto out_release_bufs;
6026 }
6027
6028 /* Add adapter instance into mid-layer list */
6029 rc = scsi_add_host(pinstance->host, &pdev->dev);
6030 if (rc != 0) {
6031 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
6032 goto out_release_bufs;
6033 }
6034
6035 scsi_scan_host(pinstance->host);
6036
6037 rc = pmcraid_setup_chrdev(pinstance);
6038
6039 if (rc != 0) {
6040 pmcraid_err("couldn't create mgmt interface, error: %x\n",
6041 rc);
6042 goto out_remove_host;
6043 }
6044
6045 /* Schedule worker thread to handle CCN and take care of adding and
6046 * removing devices to OS
6047 */
6048 atomic_set(&pinstance->expose_resources, 1);
6049 schedule_work(&pinstance->worker_q);
6050 return rc;
6051
6052out_remove_host:
6053 scsi_remove_host(host);
6054
6055out_release_bufs:
6056 pmcraid_release_buffers(pinstance);
6057
6058out_unregister_isr:
6059 pmcraid_kill_tasklets(pinstance);
6060 pmcraid_unregister_interrupt_handler(pinstance);
6061
6062out_scsi_host_put:
6063 scsi_host_put(host);
6064
6065cleanup_nomem:
6066 iounmap(mapped_pci_addr);
6067
6068out_release_regions:
6069 pci_release_regions(pdev);
6070
6071out_disable_device:
6072 atomic_dec(&pmcraid_adapter_count);
6073 pci_set_drvdata(pdev, NULL);
6074 pci_disable_device(pdev);
6075 return -ENODEV;
6076}
6077
6078/*
6079 * PCI driver structure of pcmraid driver
6080 */
6081static struct pci_driver pmcraid_driver = {
6082 .name = PMCRAID_DRIVER_NAME,
6083 .id_table = pmcraid_pci_table,
6084 .probe = pmcraid_probe,
6085 .remove = pmcraid_remove,
6086 .suspend = pmcraid_suspend,
6087 .resume = pmcraid_resume,
6088 .shutdown = pmcraid_shutdown
6089};
6090
89a36810
AR		 6091/**
6092 * pmcraid_init - module load entry point
6093 */
6094static int __init pmcraid_init(void)
6095{
6096 dev_t dev;
6097 int error;
6098
6099 pmcraid_info("%s Device Driver version: %s %s\n",
6100 PMCRAID_DRIVER_NAME,
6101 PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
6102
6103 error = alloc_chrdev_region(&dev, 0,
6104 PMCRAID_MAX_ADAPTERS,
6105 PMCRAID_DEVFILE);
6106
6107 if (error) {
6108 pmcraid_err("failed to get a major number for adapters\n");
6109 goto out_init;
6110 }
6111
6112 pmcraid_major = MAJOR(dev);
6113 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
6114
6115 if (IS_ERR(pmcraid_class)) {
6116 error = PTR_ERR(pmcraid_class);
6117 pmcraid_err("failed to register with with sysfs, error = %x\n",
6118 error);
6119 goto out_unreg_chrdev;
6120 }
6121
89a36810
AR		 6122 error = pmcraid_netlink_init();
6123
6124 if (error)
6125 goto out_unreg_chrdev;
6126
6127 error = pci_register_driver(&pmcraid_driver);
6128
6129 if (error == 0)
6130 goto out_init;
6131
6132 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6133 error);
6134 class_destroy(pmcraid_class);
6135 pmcraid_netlink_release();
6136
6137out_unreg_chrdev:
6138 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
34876402 6139
89a36810
AR		 6140out_init:
6141 return error;
6142}
6143
6144/**
6145 * pmcraid_exit - module unload entry point
6146 */
6147static void __exit pmcraid_exit(void)
6148{
6149 pmcraid_netlink_release();
89a36810
AR		 6150 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
6151 PMCRAID_MAX_ADAPTERS);
6152 pci_unregister_driver(&pmcraid_driver);
592488a3 6153 class_destroy(pmcraid_class);
89a36810
AR		 6154}
6155
6156module_init(pmcraid_init);
6157module_exit(pmcraid_exit);
kernel source for telekom puls (alcatel/mediatek)