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drivers: power: report battery voltage in AOSP compatible format
[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>
89a36810 42#include <linux/io.h>
5a0e3ad6 43#include <linux/slab.h>
89a36810
AR		 44#include <asm/irq.h>
45#include <asm/processor.h>
46#include <linux/libata.h>
47#include <linux/mutex.h>
48#include <scsi/scsi.h>
49#include <scsi/scsi_host.h>
34876402 50#include <scsi/scsi_device.h>
89a36810
AR		 51#include <scsi/scsi_tcq.h>
52#include <scsi/scsi_eh.h>
53#include <scsi/scsi_cmnd.h>
54#include <scsi/scsicam.h>
55
56#include "pmcraid.h"
57
58/*
59 * Module configuration parameters
60 */
61static unsigned int pmcraid_debug_log;
62static unsigned int pmcraid_disable_aen;
63static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
5da61410 64static unsigned int pmcraid_enable_msix;
89a36810
AR		 65
66/*
67 * Data structures to support multiple adapters by the LLD.
68 * pmcraid_adapter_count - count of configured adapters
69 */
70static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
71
72/*
73 * Supporting user-level control interface through IOCTL commands.
74 * pmcraid_major - major number to use
75 * pmcraid_minor - minor number(s) to use
76 */
77static unsigned int pmcraid_major;
78static struct class *pmcraid_class;
79DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
80
81/*
82 * Module parameters
83 */
729c8456 84MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
89a36810
AR		 85MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
86MODULE_LICENSE("GPL");
87MODULE_VERSION(PMCRAID_DRIVER_VERSION);
88
89module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
90MODULE_PARM_DESC(log_level,
91 "Enables firmware error code logging, default :1 high-severity"
92 " errors, 2: all errors including high-severity errors,"
93 " 0: disables logging");
94
95module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
96MODULE_PARM_DESC(debug,
97 "Enable driver verbose message logging. Set 1 to enable."
98 "(default: 0)");
99
100module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
101MODULE_PARM_DESC(disable_aen,
102 "Disable driver aen notifications to apps. Set 1 to disable."
103 "(default: 0)");
104
105/* chip specific constants for PMC MaxRAID controllers (same for
106 * 0x5220 and 0x8010
107 */
108static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
109 {
110 .ioastatus = 0x0,
111 .ioarrin = 0x00040,
112 .mailbox = 0x7FC30,
113 .global_intr_mask = 0x00034,
114 .ioa_host_intr = 0x0009C,
115 .ioa_host_intr_clr = 0x000A0,
c20c4267 116 .ioa_host_msix_intr = 0x7FC40,
89a36810
AR		 117 .ioa_host_mask = 0x7FC28,
118 .ioa_host_mask_clr = 0x7FC28,
119 .host_ioa_intr = 0x00020,
120 .host_ioa_intr_clr = 0x00020,
121 .transop_timeout = 300
122 }
123};
124
125/*
126 * PCI device ids supported by pmcraid driver
127 */
6f039790 128static struct pci_device_id pmcraid_pci_table[] = {
89a36810
AR		 129 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
130 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
131 },
132 {}
133};
134
135MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
136
137
138
139/**
140 * pmcraid_slave_alloc - Prepare for commands to a device
141 * @scsi_dev: scsi device struct
142 *
143 * This function is called by mid-layer prior to sending any command to the new
144 * device. Stores resource entry details of the device in scsi_device struct.
145 * Queuecommand uses the resource handle and other details to fill up IOARCB
146 * while sending commands to the device.
147 *
148 * Return value:
149 * 0 on success / -ENXIO if device does not exist
150 */
151static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
152{
153 struct pmcraid_resource_entry *temp, *res = NULL;
154 struct pmcraid_instance *pinstance;
155 u8 target, bus, lun;
156 unsigned long lock_flags;
157 int rc = -ENXIO;
c20c4267
AR		 158 u16 fw_version;
159
89a36810
AR		 160 pinstance = shost_priv(scsi_dev->host);
161
c20c4267
AR		 162 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
163
89a36810
AR		 164 /* Driver exposes VSET and GSCSI resources only; all other device types
165 * are not exposed. Resource list is synchronized using resource lock
166 * so any traversal or modifications to the list should be done inside
167 * this lock
168 */
169 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
170 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
171
729c8456 172 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
89a36810 173 if (RES_IS_VSET(temp->cfg_entry)) {
c20c4267
AR		 174 if (fw_version <= PMCRAID_FW_VERSION_1)
175 target = temp->cfg_entry.unique_flags1;
176 else
177 target = temp->cfg_entry.array_id & 0xFF;
178
729c8456 179 if (target > PMCRAID_MAX_VSET_TARGETS)
89a36810
AR		 180 continue;
181 bus = PMCRAID_VSET_BUS_ID;
182 lun = 0;
183 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
184 target = RES_TARGET(temp->cfg_entry.resource_address);
185 bus = PMCRAID_PHYS_BUS_ID;
186 lun = RES_LUN(temp->cfg_entry.resource_address);
187 } else {
188 continue;
189 }
190
191 if (bus == scsi_dev->channel &&
192 target == scsi_dev->id &&
193 lun == scsi_dev->lun) {
194 res = temp;
195 break;
196 }
197 }
198
199 if (res) {
200 res->scsi_dev = scsi_dev;
201 scsi_dev->hostdata = res;
202 res->change_detected = 0;
203 atomic_set(&res->read_failures, 0);
204 atomic_set(&res->write_failures, 0);
205 rc = 0;
206 }
207 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
208 return rc;
209}
210
211/**
212 * pmcraid_slave_configure - Configures a SCSI device
213 * @scsi_dev: scsi device struct
214 *
25985edc 215 * This function is executed by SCSI mid layer just after a device is first
89a36810
AR		 216 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
217 * timeout value (default 30s) will be over-written to a higher value (60s)
218 * and max_sectors value will be over-written to 512. It also sets queue depth
219 * to host->cmd_per_lun value
220 *
221 * Return value:
222 * 0 on success
223 */
224static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
225{
226 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
227
228 if (!res)
229 return 0;
230
231 /* LLD exposes VSETs and Enclosure devices only */
232 if (RES_IS_GSCSI(res->cfg_entry) &&
233 scsi_dev->type != TYPE_ENCLOSURE)
234 return -ENXIO;
235
236 pmcraid_info("configuring %x:%x:%x:%x\n",
237 scsi_dev->host->unique_id,
238 scsi_dev->channel,
239 scsi_dev->id,
240 scsi_dev->lun);
241
242 if (RES_IS_GSCSI(res->cfg_entry)) {
243 scsi_dev->allow_restart = 1;
244 } else if (RES_IS_VSET(res->cfg_entry)) {
245 scsi_dev->allow_restart = 1;
246 blk_queue_rq_timeout(scsi_dev->request_queue,
247 PMCRAID_VSET_IO_TIMEOUT);
086fa5ff 248 blk_queue_max_hw_sectors(scsi_dev->request_queue,
89a36810
AR		 249 PMCRAID_VSET_MAX_SECTORS);
250 }
251
252 if (scsi_dev->tagged_supported &&
253 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
254 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
255 scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
256 scsi_dev->host->cmd_per_lun);
257 } else {
258 scsi_adjust_queue_depth(scsi_dev, 0,
259 scsi_dev->host->cmd_per_lun);
260 }
261
262 return 0;
263}
264
265/**
266 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
267 *
268 * @scsi_dev: scsi device struct
269 *
270 * This is called by mid-layer before removing a device. Pointer assignments
271 * done in pmcraid_slave_alloc will be reset to NULL here.
272 *
273 * Return value
274 * none
275 */
276static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
277{
278 struct pmcraid_resource_entry *res;
279
280 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
281
282 if (res)
283 res->scsi_dev = NULL;
284
285 scsi_dev->hostdata = NULL;
286}
287
288/**
289 * pmcraid_change_queue_depth - Change the device's queue depth
290 * @scsi_dev: scsi device struct
291 * @depth: depth to set
e881a172 292 * @reason: calling context
89a36810
AR		 293 *
294 * Return value
c20c4267 295 * actual depth set
89a36810 296 */
e881a172
MC		 297static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
298 int reason)
89a36810 299{
e881a172
MC		 300 if (reason != SCSI_QDEPTH_DEFAULT)
301 return -EOPNOTSUPP;
302
89a36810
AR		 303 if (depth > PMCRAID_MAX_CMD_PER_LUN)
304 depth = PMCRAID_MAX_CMD_PER_LUN;
305
306 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
307
308 return scsi_dev->queue_depth;
309}
310
311/**
312 * pmcraid_change_queue_type - Change the device's queue type
313 * @scsi_dev: scsi device struct
314 * @tag: type of tags to use
315 *
316 * Return value:
c20c4267 317 * actual queue type set
89a36810
AR		 318 */
319static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
320{
321 struct pmcraid_resource_entry *res;
322
323 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
324
325 if ((res) && scsi_dev->tagged_supported &&
326 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
327 scsi_set_tag_type(scsi_dev, tag);
328
329 if (tag)
330 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
331 else
332 scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
333 } else
334 tag = 0;
335
336 return tag;
337}
338
339
340/**
341 * pmcraid_init_cmdblk - initializes a command block
342 *
343 * @cmd: pointer to struct pmcraid_cmd to be initialized
344 * @index: if >=0 first time initialization; otherwise reinitialization
345 *
346 * Return Value
347 * None
348 */
349void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
350{
351 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
352 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
353
354 if (index >= 0) {
355 /* first time initialization (called from probe) */
356 u32 ioasa_offset =
357 offsetof(struct pmcraid_control_block, ioasa);
358
359 cmd->index = index;
360 ioarcb->response_handle = cpu_to_le32(index << 2);
361 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
362 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
363 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
364 } else {
365 /* re-initialization of various lengths, called once command is
366 * processed by IOA
367 */
368 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
c20c4267 369 ioarcb->hrrq_id = 0;
89a36810
AR		 370 ioarcb->request_flags0 = 0;
371 ioarcb->request_flags1 = 0;
372 ioarcb->cmd_timeout = 0;
373 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
374 ioarcb->ioadl_bus_addr = 0;
375 ioarcb->ioadl_length = 0;
376 ioarcb->data_transfer_length = 0;
377 ioarcb->add_cmd_param_length = 0;
378 ioarcb->add_cmd_param_offset = 0;
379 cmd->ioa_cb->ioasa.ioasc = 0;
380 cmd->ioa_cb->ioasa.residual_data_length = 0;
c20c4267 381 cmd->time_left = 0;
89a36810
AR		 382 }
383
384 cmd->cmd_done = NULL;
385 cmd->scsi_cmd = NULL;
386 cmd->release = 0;
387 cmd->completion_req = 0;
c20c4267
AR		 388 cmd->sense_buffer = 0;
389 cmd->sense_buffer_dma = 0;
89a36810
AR		 390 cmd->dma_handle = 0;
391 init_timer(&cmd->timer);
392}
393
394/**
395 * pmcraid_reinit_cmdblk - reinitialize a command block
396 *
397 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
398 *
399 * Return Value
400 * None
401 */
402static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
403{
404 pmcraid_init_cmdblk(cmd, -1);
405}
406
407/**
408 * pmcraid_get_free_cmd - get a free cmd block from command block pool
409 * @pinstance: adapter instance structure
410 *
411 * Return Value:
412 * returns pointer to cmd block or NULL if no blocks are available
413 */
414static struct pmcraid_cmd *pmcraid_get_free_cmd(
415 struct pmcraid_instance *pinstance
416)
417{
418 struct pmcraid_cmd *cmd = NULL;
419 unsigned long lock_flags;
420
421 /* free cmd block list is protected by free_pool_lock */
422 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
423
424 if (!list_empty(&pinstance->free_cmd_pool)) {
425 cmd = list_entry(pinstance->free_cmd_pool.next,
426 struct pmcraid_cmd, free_list);
427 list_del(&cmd->free_list);
428 }
429 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
430
431 /* Initialize the command block before giving it the caller */
432 if (cmd != NULL)
433 pmcraid_reinit_cmdblk(cmd);
434 return cmd;
435}
436
437/**
438 * pmcraid_return_cmd - return a completed command block back into free pool
439 * @cmd: pointer to the command block
440 *
441 * Return Value:
442 * nothing
443 */
444void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
445{
446 struct pmcraid_instance *pinstance = cmd->drv_inst;
447 unsigned long lock_flags;
448
449 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
450 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
451 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
452}
453
454/**
455 * pmcraid_read_interrupts - reads IOA interrupts
456 *
457 * @pinstance: pointer to adapter instance structure
458 *
459 * Return value
460 * interrupts read from IOA
461 */
462static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
463{
c20c4267
AR		 464 return (pinstance->interrupt_mode) ?
465 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
466 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
89a36810
AR		 467}
468
469/**
470 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
471 *
472 * @pinstance: pointer to per adapter instance structure
473 * @intrs: interrupts to disable
474 *
475 * Return Value
476 * None
477 */
478static void pmcraid_disable_interrupts(
479 struct pmcraid_instance *pinstance,
480 u32 intrs
481)
482{
483 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
484 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
485
89a36810 486 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
c20c4267
AR		 487 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
488 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
489
490 if (!pinstance->interrupt_mode) {
491 iowrite32(intrs,
492 pinstance->int_regs.ioa_host_interrupt_mask_reg);
493 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
494 }
89a36810
AR		 495}
496
497/**
498 * pmcraid_enable_interrupts - Enables specified interrupts
499 *
500 * @pinstance: pointer to per adapter instance structure
501 * @intr: interrupts to enable
502 *
503 * Return Value
504 * None
505 */
506static void pmcraid_enable_interrupts(
507 struct pmcraid_instance *pinstance,
508 u32 intrs
509)
510{
511 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
512 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
513
514 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
c20c4267
AR		 515
516 if (!pinstance->interrupt_mode) {
517 iowrite32(~intrs,
518 pinstance->int_regs.ioa_host_interrupt_mask_reg);
519 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
520 }
89a36810
AR		 521
522 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
523 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
524 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
525}
526
c20c4267
AR		 527/**
528 * pmcraid_clr_trans_op - clear trans to op interrupt
529 *
530 * @pinstance: pointer to per adapter instance structure
531 *
532 * Return Value
533 * None
534 */
535static void pmcraid_clr_trans_op(
536 struct pmcraid_instance *pinstance
537)
538{
539 unsigned long lock_flags;
540
541 if (!pinstance->interrupt_mode) {
542 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
543 pinstance->int_regs.ioa_host_interrupt_mask_reg);
544 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
545 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
546 pinstance->int_regs.ioa_host_interrupt_clr_reg);
547 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
548 }
549
550 if (pinstance->reset_cmd != NULL) {
551 del_timer(&pinstance->reset_cmd->timer);
552 spin_lock_irqsave(
553 pinstance->host->host_lock, lock_flags);
554 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
555 spin_unlock_irqrestore(
556 pinstance->host->host_lock, lock_flags);
557 }
558}
559
89a36810
AR		 560/**
561 * pmcraid_reset_type - Determine the required reset type
562 * @pinstance: pointer to adapter instance structure
563 *
564 * IOA requires hard reset if any of the following conditions is true.
565 * 1. If HRRQ valid interrupt is not masked
566 * 2. IOA reset alert doorbell is set
567 * 3. If there are any error interrupts
568 */
569static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
570{
571 u32 mask;
572 u32 intrs;
573 u32 alerts;
574
575 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
576 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
577 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
578
579 if ((mask & INTRS_HRRQ_VALID) == 0 ||
580 (alerts & DOORBELL_IOA_RESET_ALERT) ||
581 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
582 pmcraid_info("IOA requires hard reset\n");
583 pinstance->ioa_hard_reset = 1;
584 }
585
586 /* If unit check is active, trigger the dump */
587 if (intrs & INTRS_IOA_UNIT_CHECK)
588 pinstance->ioa_unit_check = 1;
589}
590
591/**
592 * pmcraid_bist_done - completion function for PCI BIST
593 * @cmd: pointer to reset command
594 * Return Value
c20c4267 595 * none
89a36810
AR		 596 */
597
598static void pmcraid_ioa_reset(struct pmcraid_cmd *);
599
600static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
601{
602 struct pmcraid_instance *pinstance = cmd->drv_inst;
603 unsigned long lock_flags;
604 int rc;
605 u16 pci_reg;
606
607 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
608
609 /* If PCI config space can't be accessed wait for another two secs */
610 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
c20c4267 611 cmd->time_left > 0) {
89a36810 612 pmcraid_info("BIST not complete, waiting another 2 secs\n");
c20c4267
AR		 613 cmd->timer.expires = jiffies + cmd->time_left;
614 cmd->time_left = 0;
89a36810
AR		 615 cmd->timer.data = (unsigned long)cmd;
616 cmd->timer.function =
617 (void (*)(unsigned long))pmcraid_bist_done;
618 add_timer(&cmd->timer);
619 } else {
c20c4267 620 cmd->time_left = 0;
89a36810
AR		 621 pmcraid_info("BIST is complete, proceeding with reset\n");
622 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
623 pmcraid_ioa_reset(cmd);
624 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
625 }
626}
627
628/**
629 * pmcraid_start_bist - starts BIST
630 * @cmd: pointer to reset cmd
631 * Return Value
632 * none
633 */
634static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
635{
636 struct pmcraid_instance *pinstance = cmd->drv_inst;
637 u32 doorbells, intrs;
638
639 /* proceed with bist and wait for 2 seconds */
640 iowrite32(DOORBELL_IOA_START_BIST,
641 pinstance->int_regs.host_ioa_interrupt_reg);
642 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
643 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
c20c4267 644 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
89a36810
AR		 645 doorbells, intrs);
646
c20c4267 647 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
89a36810
AR		 648 cmd->timer.data = (unsigned long)cmd;
649 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
650 cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
651 add_timer(&cmd->timer);
652}
653
654/**
655 * pmcraid_reset_alert_done - completion routine for reset_alert
656 * @cmd: pointer to command block used in reset sequence
657 * Return value
658 * None
659 */
660static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
661{
662 struct pmcraid_instance *pinstance = cmd->drv_inst;
663 u32 status = ioread32(pinstance->ioa_status);
664 unsigned long lock_flags;
665
666 /* if the critical operation in progress bit is set or the wait times
667 * out, invoke reset engine to proceed with hard reset. If there is
668 * some more time to wait, restart the timer
669 */
670 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
c20c4267 671 cmd->time_left <= 0) {
89a36810
AR		 672 pmcraid_info("critical op is reset proceeding with reset\n");
673 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
674 pmcraid_ioa_reset(cmd);
675 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
676 } else {
677 pmcraid_info("critical op is not yet reset waiting again\n");
678 /* restart timer if some more time is available to wait */
c20c4267 679 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
89a36810
AR		 680 cmd->timer.data = (unsigned long)cmd;
681 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
682 cmd->timer.function =
683 (void (*)(unsigned long))pmcraid_reset_alert_done;
684 add_timer(&cmd->timer);
685 }
686}
687
688/**
689 * pmcraid_reset_alert - alerts IOA for a possible reset
690 * @cmd : command block to be used for reset sequence.
691 *
692 * Return Value
693 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
694 * successfully written to IOA. Returns non-zero in case pci_config_space
695 * is not accessible
696 */
c20c4267 697static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
89a36810
AR		 698static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
699{
700 struct pmcraid_instance *pinstance = cmd->drv_inst;
701 u32 doorbells;
702 int rc;
703 u16 pci_reg;
704
705 /* If we are able to access IOA PCI config space, alert IOA that we are
706 * going to reset it soon. This enables IOA to preserv persistent error
707 * data if any. In case memory space is not accessible, proceed with
708 * BIST or slot_reset
709 */
710 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
711 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
712
713 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
714 * reset IOA doesn't generate any interrupts when CRITICAL
715 * OPERATION bit is reset. A timer is started to wait for this
716 * bit to be reset.
717 */
c20c4267 718 cmd->time_left = PMCRAID_RESET_TIMEOUT;
89a36810
AR		 719 cmd->timer.data = (unsigned long)cmd;
720 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
721 cmd->timer.function =
722 (void (*)(unsigned long))pmcraid_reset_alert_done;
723 add_timer(&cmd->timer);
724
725 iowrite32(DOORBELL_IOA_RESET_ALERT,
726 pinstance->int_regs.host_ioa_interrupt_reg);
727 doorbells =
728 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
729 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
730 } else {
731 pmcraid_info("PCI config is not accessible starting BIST\n");
732 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
733 pmcraid_start_bist(cmd);
734 }
735}
736
737/**
738 * pmcraid_timeout_handler - Timeout handler for internally generated ops
739 *
740 * @cmd : pointer to command structure, that got timedout
741 *
742 * This function blocks host requests and initiates an adapter reset.
743 *
744 * Return value:
745 * None
746 */
747static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
748{
749 struct pmcraid_instance *pinstance = cmd->drv_inst;
750 unsigned long lock_flags;
751
34876402 752 dev_info(&pinstance->pdev->dev,
c20c4267
AR		 753 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
754 cmd->ioa_cb->ioarcb.cdb[0]);
89a36810
AR		 755
756 /* Command timeouts result in hard reset sequence. The command that got
757 * timed out may be the one used as part of reset sequence. In this
758 * case restart reset sequence using the same command block even if
759 * reset is in progress. Otherwise fail this command and get a free
760 * command block to restart the reset sequence.
761 */
762 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
763 if (!pinstance->ioa_reset_in_progress) {
764 pinstance->ioa_reset_attempts = 0;
765 cmd = pmcraid_get_free_cmd(pinstance);
766
767 /* If we are out of command blocks, just return here itself.
768 * Some other command's timeout handler can do the reset job
769 */
770 if (cmd == NULL) {
771 spin_unlock_irqrestore(pinstance->host->host_lock,
772 lock_flags);
773 pmcraid_err("no free cmnd block for timeout handler\n");
774 return;
775 }
776
777 pinstance->reset_cmd = cmd;
778 pinstance->ioa_reset_in_progress = 1;
779 } else {
780 pmcraid_info("reset is already in progress\n");
781
782 if (pinstance->reset_cmd != cmd) {
783 /* This command should have been given to IOA, this
784 * command will be completed by fail_outstanding_cmds
785 * anyway
786 */
787 pmcraid_err("cmd is pending but reset in progress\n");
788 }
789
790 /* If this command was being used as part of the reset
791 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
792 * causes fail_outstanding_commands not to return the command
793 * block back to free pool
794 */
795 if (cmd == pinstance->reset_cmd)
796 cmd->cmd_done = pmcraid_ioa_reset;
89a36810
AR		 797 }
798
c20c4267
AR		 799 /* Notify apps of important IOA bringup/bringdown sequences */
800 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
801 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
802 pmcraid_notify_ioastate(pinstance,
803 PMC_DEVICE_EVENT_RESET_START);
804
89a36810
AR		 805 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
806 scsi_block_requests(pinstance->host);
807 pmcraid_reset_alert(cmd);
808 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
809}
810
811/**
812 * pmcraid_internal_done - completion routine for internally generated cmds
813 *
814 * @cmd: command that got response from IOA
815 *
816 * Return Value:
817 * none
818 */
819static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
820{
821 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
822 cmd->ioa_cb->ioarcb.cdb[0],
823 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
824
825 /* Some of the internal commands are sent with callers blocking for the
826 * response. Same will be indicated as part of cmd->completion_req
827 * field. Response path needs to wake up any waiters waiting for cmd
828 * completion if this flag is set.
829 */
830 if (cmd->completion_req) {
831 cmd->completion_req = 0;
832 complete(&cmd->wait_for_completion);
833 }
834
835 /* most of the internal commands are completed by caller itself, so
836 * no need to return the command block back to free pool until we are
837 * required to do so (e.g once done with initialization).
838 */
839 if (cmd->release) {
840 cmd->release = 0;
841 pmcraid_return_cmd(cmd);
842 }
843}
844
845/**
846 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
847 *
848 * @cmd: command that got response from IOA
849 *
850 * This routine is called after driver re-reads configuration table due to a
851 * lost CCN. It returns the command block back to free pool and schedules
852 * worker thread to add/delete devices into the system.
853 *
854 * Return Value:
855 * none
856 */
857static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
858{
859 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
860 cmd->ioa_cb->ioarcb.cdb[0],
861 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
862
863 if (cmd->release) {
864 cmd->release = 0;
865 pmcraid_return_cmd(cmd);
866 }
867 pmcraid_info("scheduling worker for config table reinitialization\n");
868 schedule_work(&cmd->drv_inst->worker_q);
869}
870
871/**
872 * pmcraid_erp_done - Process completion of SCSI error response from device
873 * @cmd: pmcraid_command
874 *
875 * This function copies the sense buffer into the scsi_cmd struct and completes
876 * scsi_cmd by calling scsi_done function.
877 *
878 * Return value:
879 * none
880 */
881static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
882{
883 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
884 struct pmcraid_instance *pinstance = cmd->drv_inst;
885 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
886
887 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
888 scsi_cmd->result |= (DID_ERROR << 16);
34876402
AR		 889 scmd_printk(KERN_INFO, scsi_cmd,
890 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
891 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
89a36810
AR		 892 }
893
894 /* if we had allocated sense buffers for request sense, copy the sense
895 * release the buffers
896 */
897 if (cmd->sense_buffer != NULL) {
898 memcpy(scsi_cmd->sense_buffer,
899 cmd->sense_buffer,
900 SCSI_SENSE_BUFFERSIZE);
901 pci_free_consistent(pinstance->pdev,
902 SCSI_SENSE_BUFFERSIZE,
903 cmd->sense_buffer, cmd->sense_buffer_dma);
904 cmd->sense_buffer = NULL;
905 cmd->sense_buffer_dma = 0;
906 }
907
908 scsi_dma_unmap(scsi_cmd);
909 pmcraid_return_cmd(cmd);
910 scsi_cmd->scsi_done(scsi_cmd);
911}
912
913/**
914 * pmcraid_fire_command - sends an IOA command to adapter
915 *
916 * This function adds the given block into pending command list
917 * and returns without waiting
918 *
919 * @cmd : command to be sent to the device
920 *
921 * Return Value
922 * None
923 */
924static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
925{
926 struct pmcraid_instance *pinstance = cmd->drv_inst;
927 unsigned long lock_flags;
928
929 /* Add this command block to pending cmd pool. We do this prior to
930 * writting IOARCB to ioarrin because IOA might complete the command
931 * by the time we are about to add it to the list. Response handler
c20c4267 932 * (isr/tasklet) looks for cmd block in the pending pending list.
89a36810
AR		 933 */
934 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
935 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
936 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
937 atomic_inc(&pinstance->outstanding_cmds);
938
939 /* driver writes lower 32-bit value of IOARCB address only */
940 mb();
941 iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
942 pinstance->ioarrin);
943}
944
945/**
946 * pmcraid_send_cmd - fires a command to IOA
947 *
948 * This function also sets up timeout function, and command completion
949 * function
950 *
951 * @cmd: pointer to the command block to be fired to IOA
952 * @cmd_done: command completion function, called once IOA responds
953 * @timeout: timeout to wait for this command completion
954 * @timeout_func: timeout handler
955 *
956 * Return value
957 * none
958 */
959static void pmcraid_send_cmd(
960 struct pmcraid_cmd *cmd,
961 void (*cmd_done) (struct pmcraid_cmd *),
962 unsigned long timeout,
963 void (*timeout_func) (struct pmcraid_cmd *)
964)
965{
966 /* initialize done function */
967 cmd->cmd_done = cmd_done;
968
969 if (timeout_func) {
970 /* setup timeout handler */
971 cmd->timer.data = (unsigned long)cmd;
972 cmd->timer.expires = jiffies + timeout;
973 cmd->timer.function = (void (*)(unsigned long))timeout_func;
974 add_timer(&cmd->timer);
975 }
976
977 /* fire the command to IOA */
978 _pmcraid_fire_command(cmd);
979}
980
c20c4267
AR		 981/**
982 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
983 * @cmd: pointer to the command block used for sending IOA shutdown command
984 *
985 * Return value
986 * None
987 */
988static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
989{
990 struct pmcraid_instance *pinstance = cmd->drv_inst;
991 unsigned long lock_flags;
992
993 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
994 pmcraid_ioa_reset(cmd);
995 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
996}
997
89a36810
AR		 998/**
999 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
1000 *
1001 * @cmd: pointer to the command block used as part of reset sequence
1002 *
1003 * Return Value
1004 * None
1005 */
1006static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
1007{
1008 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
1009 cmd->ioa_cb->ioarcb.cdb[0],
1010 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1011
1012 /* Note that commands sent during reset require next command to be sent
1013 * to IOA. Hence reinit the done function as well as timeout function
1014 */
1015 pmcraid_reinit_cmdblk(cmd);
1016 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
1017 cmd->ioa_cb->ioarcb.resource_handle =
1018 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1019 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
1020 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
1021
1022 /* fire shutdown command to hardware. */
1023 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
1024 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
1025
c20c4267
AR		 1026 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
1027
1028 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
89a36810
AR		 1029 PMCRAID_SHUTDOWN_TIMEOUT,
1030 pmcraid_timeout_handler);
1031}
1032
1033/**
c20c4267
AR		 1034 * pmcraid_get_fwversion_done - completion function for get_fwversion
1035 *
1036 * @cmd: pointer to command block used to send INQUIRY command
89a36810
AR		 1037 *
1038 * Return Value
c20c4267 1039 * none
89a36810 1040 */
89a36810
AR		 1041static void pmcraid_querycfg(struct pmcraid_cmd *);
1042
c20c4267
AR		 1043static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
1044{
1045 struct pmcraid_instance *pinstance = cmd->drv_inst;
1046 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1047 unsigned long lock_flags;
1048
1049 /* configuration table entry size depends on firmware version. If fw
1050 * version is not known, it is not possible to interpret IOA config
1051 * table
1052 */
1053 if (ioasc) {
1054 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
1055 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1056 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1057 pmcraid_reset_alert(cmd);
1058 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1059 } else {
1060 pmcraid_querycfg(cmd);
1061 }
1062}
1063
1064/**
1065 * pmcraid_get_fwversion - reads firmware version information
1066 *
1067 * @cmd: pointer to command block used to send INQUIRY command
1068 *
1069 * Return Value
1070 * none
1071 */
1072static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1073{
1074 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1075 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
1076 struct pmcraid_instance *pinstance = cmd->drv_inst;
1077 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1078
1079 pmcraid_reinit_cmdblk(cmd);
1080 ioarcb->request_type = REQ_TYPE_SCSI;
1081 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1082 ioarcb->cdb[0] = INQUIRY;
1083 ioarcb->cdb[1] = 1;
1084 ioarcb->cdb[2] = 0xD0;
1085 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1086 ioarcb->cdb[4] = data_size & 0xFF;
1087
1088 /* Since entire inquiry data it can be part of IOARCB itself
1089 */
1090 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1091 offsetof(struct pmcraid_ioarcb,
1092 add_data.u.ioadl[0]));
1093 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1094 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
1095
1096 ioarcb->request_flags0 |= NO_LINK_DESCS;
1097 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1098 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1099 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1100 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1101 ioadl->data_len = cpu_to_le32(data_size);
1102
1103 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1104 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1105}
1106
1107/**
1108 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1109 * @cmd: pointer to command block to be used for identify hrrq
1110 *
1111 * Return Value
1112 * none
1113 */
89a36810
AR		 1114static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1115{
1116 struct pmcraid_instance *pinstance = cmd->drv_inst;
1117 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
c20c4267 1118 int index = cmd->hrrq_index;
89a36810
AR		 1119 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1120 u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
c20c4267 1121 void (*done_function)(struct pmcraid_cmd *);
89a36810
AR		 1122
1123 pmcraid_reinit_cmdblk(cmd);
c20c4267
AR		 1124 cmd->hrrq_index = index + 1;
1125
1126 if (cmd->hrrq_index < pinstance->num_hrrq) {
1127 done_function = pmcraid_identify_hrrq;
1128 } else {
1129 cmd->hrrq_index = 0;
1130 done_function = pmcraid_get_fwversion;
1131 }
89a36810
AR		 1132
1133 /* Initialize ioarcb */
1134 ioarcb->request_type = REQ_TYPE_IOACMD;
1135 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1136
1137 /* initialize the hrrq number where IOA will respond to this command */
1138 ioarcb->hrrq_id = index;
1139 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1140 ioarcb->cdb[1] = index;
1141
1142 /* IOA expects 64-bit pci address to be written in B.E format
1143 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1144 */
c20c4267
AR		 1145 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1146 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
89a36810
AR		 1147
1148 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1149 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1150
1151 /* Subsequent commands require HRRQ identification to be successful.
1152 * Note that this gets called even during reset from SCSI mid-layer
1153 * or tasklet
1154 */
c20c4267 1155 pmcraid_send_cmd(cmd, done_function,
89a36810
AR		 1156 PMCRAID_INTERNAL_TIMEOUT,
1157 pmcraid_timeout_handler);
1158}
1159
1160static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1161static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1162
1163/**
1164 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1165 *
1166 * @cmd: initialized command block pointer
1167 *
1168 * Return Value
1169 * none
1170 */
1171static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1172{
1173 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1174 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1175 else
1176 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1177
1178 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1179}
1180
1181/**
1182 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1183 *
1184 * @pinstance: pointer to adapter instance structure
1185 * @type: HCAM type
1186 *
1187 * Return Value
1188 * pointer to initialized pmcraid_cmd structure or NULL
1189 */
1190static struct pmcraid_cmd *pmcraid_init_hcam
1191(
1192 struct pmcraid_instance *pinstance,
1193 u8 type
1194)
1195{
1196 struct pmcraid_cmd *cmd;
1197 struct pmcraid_ioarcb *ioarcb;
1198 struct pmcraid_ioadl_desc *ioadl;
1199 struct pmcraid_hostrcb *hcam;
1200 void (*cmd_done) (struct pmcraid_cmd *);
1201 dma_addr_t dma;
1202 int rcb_size;
1203
1204 cmd = pmcraid_get_free_cmd(pinstance);
1205
1206 if (!cmd) {
1207 pmcraid_err("no free command blocks for hcam\n");
1208 return cmd;
1209 }
1210
1211 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
c20c4267 1212 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
89a36810
AR		 1213 cmd_done = pmcraid_process_ccn;
1214 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1215 hcam = &pinstance->ccn;
1216 } else {
1217 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1218 cmd_done = pmcraid_process_ldn;
1219 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1220 hcam = &pinstance->ldn;
1221 }
1222
1223 /* initialize command pointer used for HCAM registration */
1224 hcam->cmd = cmd;
1225
1226 ioarcb = &cmd->ioa_cb->ioarcb;
1227 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1228 offsetof(struct pmcraid_ioarcb,
1229 add_data.u.ioadl[0]));
1230 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1231 ioadl = ioarcb->add_data.u.ioadl;
1232
1233 /* Initialize ioarcb */
1234 ioarcb->request_type = REQ_TYPE_HCAM;
1235 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1236 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1237 ioarcb->cdb[1] = type;
1238 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1239 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1240
1241 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1242
88197966 1243 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
89a36810
AR		 1244 ioadl[0].data_len = cpu_to_le32(rcb_size);
1245 ioadl[0].address = cpu_to_le32(dma);
1246
1247 cmd->cmd_done = cmd_done;
1248 return cmd;
1249}
1250
1251/**
1252 * pmcraid_send_hcam - Send an HCAM to IOA
1253 * @pinstance: ioa config struct
1254 * @type: HCAM type
1255 *
1256 * This function will send a Host Controlled Async command to IOA.
1257 *
1258 * Return value:
c20c4267 1259 * none
89a36810
AR		 1260 */
1261static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1262{
1263 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1264 pmcraid_send_hcam_cmd(cmd);
1265}
1266
1267
1268/**
1269 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1270 *
1271 * @cmd: pointer to cmd that is used as cancelling command
1272 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1273 */
1274static void pmcraid_prepare_cancel_cmd(
1275 struct pmcraid_cmd *cmd,
1276 struct pmcraid_cmd *cmd_to_cancel
1277)
1278{
1279 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1280 __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
1281
1282 /* Get the resource handle to where the command to be aborted has been
1283 * sent.
1284 */
1285 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1286 ioarcb->request_type = REQ_TYPE_IOACMD;
1287 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1288 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1289
1290 /* IOARCB address of the command to be cancelled is given in
1291 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1292 * IOARCB address are not masked.
1293 */
1294 ioarcb_addr = cpu_to_be64(ioarcb_addr);
1295 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1296}
1297
1298/**
1299 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1300 *
1301 * @cmd: command to be used as cancelling command
1302 * @type: HCAM type
1303 * @cmd_done: op done function for the cancelling command
1304 */
1305static void pmcraid_cancel_hcam(
1306 struct pmcraid_cmd *cmd,
1307 u8 type,
1308 void (*cmd_done) (struct pmcraid_cmd *)
1309)
1310{
1311 struct pmcraid_instance *pinstance;
1312 struct pmcraid_hostrcb *hcam;
1313
1314 pinstance = cmd->drv_inst;
1315 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1316 &pinstance->ldn : &pinstance->ccn;
1317
1318 /* prepare for cancelling previous hcam command. If the HCAM is
1319 * currently not pending with IOA, we would have hcam->cmd as non-null
1320 */
1321 if (hcam->cmd == NULL)
1322 return;
1323
1324 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1325
1326 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1327 * schedule queuecommand while we are doing this
1328 */
1329 pmcraid_send_cmd(cmd, cmd_done,
1330 PMCRAID_INTERNAL_TIMEOUT,
1331 pmcraid_timeout_handler);
1332}
1333
1334/**
1335 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1336 *
1337 * @cmd: command block to be used for cancelling the HCAM
1338 */
1339static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1340{
1341 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1342 cmd->ioa_cb->ioarcb.cdb[0],
1343 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1344
1345 pmcraid_reinit_cmdblk(cmd);
1346
1347 pmcraid_cancel_hcam(cmd,
1348 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1349 pmcraid_ioa_shutdown);
1350}
1351
1352/**
1353 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1354 *
1355 * @cmd: command block to be used for cancelling the HCAM
1356 */
1357static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1358{
1359 pmcraid_cancel_hcam(cmd,
1360 PMCRAID_HCAM_CODE_LOG_DATA,
1361 pmcraid_cancel_ccn);
1362}
1363
1364/**
1365 * pmcraid_expose_resource - check if the resource can be exposed to OS
1366 *
c20c4267 1367 * @fw_version: firmware version code
89a36810
AR		 1368 * @cfgte: pointer to configuration table entry of the resource
1369 *
1370 * Return value:
c20c4267 1371 * true if resource can be added to midlayer, false(0) otherwise
89a36810 1372 */
c20c4267
AR		 1373static int pmcraid_expose_resource(u16 fw_version,
1374 struct pmcraid_config_table_entry *cfgte)
89a36810
AR		 1375{
1376 int retval = 0;
1377
c20c4267
AR		 1378 if (cfgte->resource_type == RES_TYPE_VSET) {
1379 if (fw_version <= PMCRAID_FW_VERSION_1)
1380 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1381 else
1382 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1383 (cfgte->unique_flags1 & 0x80) == 0);
1384
1385 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
89a36810
AR		 1386 retval = (RES_BUS(cfgte->resource_address) !=
1387 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1388 return retval;
1389}
1390
1391/* attributes supported by pmcraid_event_family */
1392enum {
1393 PMCRAID_AEN_ATTR_UNSPEC,
1394 PMCRAID_AEN_ATTR_EVENT,
1395 __PMCRAID_AEN_ATTR_MAX,
1396};
1397#define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1398
1399/* commands supported by pmcraid_event_family */
1400enum {
1401 PMCRAID_AEN_CMD_UNSPEC,
1402 PMCRAID_AEN_CMD_EVENT,
1403 __PMCRAID_AEN_CMD_MAX,
1404};
1405#define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1406
1407static struct genl_family pmcraid_event_family = {
1408 .id = GENL_ID_GENERATE,
1409 .name = "pmcraid",
1410 .version = 1,
1411 .maxattr = PMCRAID_AEN_ATTR_MAX
1412};
1413
1414/**
1415 * pmcraid_netlink_init - registers pmcraid_event_family
1416 *
1417 * Return value:
c20c4267
AR		 1418 * 0 if the pmcraid_event_family is successfully registered
1419 * with netlink generic, non-zero otherwise
89a36810
AR		 1420 */
1421static int pmcraid_netlink_init(void)
1422{
1423 int result;
1424
1425 result = genl_register_family(&pmcraid_event_family);
1426
1427 if (result)
1428 return result;
1429
1430 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1431 pmcraid_event_family.id);
1432
1433 return result;
1434}
1435
1436/**
1437 * pmcraid_netlink_release - unregisters pmcraid_event_family
1438 *
1439 * Return value:
c20c4267 1440 * none
89a36810
AR		 1441 */
1442static void pmcraid_netlink_release(void)
1443{
1444 genl_unregister_family(&pmcraid_event_family);
1445}
1446
1447/**
1448 * pmcraid_notify_aen - sends event msg to user space application
1449 * @pinstance: pointer to adapter instance structure
1450 * @type: HCAM type
1451 *
1452 * Return value:
1453 * 0 if success, error value in case of any failure.
1454 */
c20c4267
AR		 1455static int pmcraid_notify_aen(
1456 struct pmcraid_instance *pinstance,
1457 struct pmcraid_aen_msg *aen_msg,
1458 u32 data_size
1459)
89a36810
AR		 1460{
1461 struct sk_buff *skb;
89a36810 1462 void *msg_header;
c20c4267 1463 u32 total_size, nla_genl_hdr_total_size;
89a36810
AR		 1464 int result;
1465
89a36810
AR		 1466 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1467 MINOR(pinstance->cdev.dev));
1468 aen_msg->length = data_size;
c20c4267 1469
89a36810
AR		 1470 data_size += sizeof(*aen_msg);
1471
1472 total_size = nla_total_size(data_size);
c20c4267
AR		 1473 /* Add GENL_HDR to total_size */
1474 nla_genl_hdr_total_size =
1475 (total_size + (GENL_HDRLEN +
1476 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1477 + NLMSG_HDRLEN);
1478 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
89a36810
AR		 1479
1480
1481 if (!skb) {
1482 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1483 total_size);
1484 return -ENOMEM;
1485 }
1486
1487 /* add the genetlink message header */
1488 msg_header = genlmsg_put(skb, 0, 0,
1489 &pmcraid_event_family, 0,
1490 PMCRAID_AEN_CMD_EVENT);
1491 if (!msg_header) {
1492 pmcraid_err("failed to copy command details\n");
1493 nlmsg_free(skb);
1494 return -ENOMEM;
1495 }
1496
1497 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1498
1499 if (result) {
c20c4267 1500 pmcraid_err("failed to copy AEN attribute data\n");
89a36810
AR		 1501 nlmsg_free(skb);
1502 return -EINVAL;
1503 }
1504
1505 /* send genetlink multicast message to notify appplications */
1506 result = genlmsg_end(skb, msg_header);
1507
1508 if (result < 0) {
1509 pmcraid_err("genlmsg_end failed\n");
1510 nlmsg_free(skb);
1511 return result;
1512 }
1513
1514 result =
1515 genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
1516
1517 /* If there are no listeners, genlmsg_multicast may return non-zero
1518 * value.
1519 */
1520 if (result)
c20c4267 1521 pmcraid_info("error (%x) sending aen event message\n", result);
89a36810
AR		 1522 return result;
1523}
1524
c20c4267
AR		 1525/**
1526 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1527 * @pinstance: pointer adapter instance structure
1528 *
1529 * Return value:
1530 * 0 if success, error value in case of any failure
1531 */
1532static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1533{
1534 return pmcraid_notify_aen(pinstance,
1535 pinstance->ccn.msg,
1536 pinstance->ccn.hcam->data_len +
1537 sizeof(struct pmcraid_hcam_hdr));
1538}
1539
1540/**
1541 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1542 * @pinstance: pointer adapter instance structure
1543 *
1544 * Return value:
1545 * 0 if success, error value in case of any failure
1546 */
1547static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1548{
1549 return pmcraid_notify_aen(pinstance,
1550 pinstance->ldn.msg,
1551 pinstance->ldn.hcam->data_len +
1552 sizeof(struct pmcraid_hcam_hdr));
1553}
1554
1555/**
1556 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1557 * @pinstance: pointer adapter instance structure
1558 * @evt: controller state event to be sent
1559 *
1560 * Return value:
1561 * 0 if success, error value in case of any failure
1562 */
1563static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1564{
1565 pinstance->scn.ioa_state = evt;
1566 pmcraid_notify_aen(pinstance,
1567 &pinstance->scn.msg,
1568 sizeof(u32));
1569}
1570
89a36810
AR		 1571/**
1572 * pmcraid_handle_config_change - Handle a config change from the adapter
1573 * @pinstance: pointer to per adapter instance structure
1574 *
1575 * Return value:
1576 * none
1577 */
729c8456 1578
89a36810
AR		 1579static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1580{
1581 struct pmcraid_config_table_entry *cfg_entry;
1582 struct pmcraid_hcam_ccn *ccn_hcam;
1583 struct pmcraid_cmd *cmd;
1584 struct pmcraid_cmd *cfgcmd;
1585 struct pmcraid_resource_entry *res = NULL;
89a36810
AR		 1586 unsigned long lock_flags;
1587 unsigned long host_lock_flags;
729c8456
AR		 1588 u32 new_entry = 1;
1589 u32 hidden_entry = 0;
c20c4267 1590 u16 fw_version;
89a36810
AR		 1591 int rc;
1592
1593 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1594 cfg_entry = &ccn_hcam->cfg_entry;
c20c4267 1595 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
89a36810 1596
592488a3
AR		 1597 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1598 res: %x:%x:%x:%x\n",
89a36810
AR		 1599 pinstance->ccn.hcam->ilid,
1600 pinstance->ccn.hcam->op_code,
592488a3
AR		 1601 ((pinstance->ccn.hcam->timestamp1) |
1602 ((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
89a36810
AR		 1603 pinstance->ccn.hcam->notification_type,
1604 pinstance->ccn.hcam->notification_lost,
1605 pinstance->ccn.hcam->flags,
1606 pinstance->host->unique_id,
1607 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1608 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1609 RES_BUS(cfg_entry->resource_address)),
c20c4267
AR		 1610 RES_IS_VSET(*cfg_entry) ?
1611 (fw_version <= PMCRAID_FW_VERSION_1 ?
1612 cfg_entry->unique_flags1 :
1613 cfg_entry->array_id & 0xFF) :
89a36810
AR		 1614 RES_TARGET(cfg_entry->resource_address),
1615 RES_LUN(cfg_entry->resource_address));
1616
1617
1618 /* If this HCAM indicates a lost notification, read the config table */
1619 if (pinstance->ccn.hcam->notification_lost) {
1620 cfgcmd = pmcraid_get_free_cmd(pinstance);
1621 if (cfgcmd) {
1622 pmcraid_info("lost CCN, reading config table\b");
1623 pinstance->reinit_cfg_table = 1;
1624 pmcraid_querycfg(cfgcmd);
1625 } else {
1626 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1627 }
1628 goto out_notify_apps;
1629 }
1630
1631 /* If this resource is not going to be added to mid-layer, just notify
729c8456
AR		 1632 * applications and return. If this notification is about hiding a VSET
1633 * resource, check if it was exposed already.
89a36810 1634 */
729c8456
AR		 1635 if (pinstance->ccn.hcam->notification_type ==
1636 NOTIFICATION_TYPE_ENTRY_CHANGED &&
c20c4267
AR		 1637 cfg_entry->resource_type == RES_TYPE_VSET) {
1638
1639 if (fw_version <= PMCRAID_FW_VERSION_1)
1640 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1641 else
1642 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1643
1644 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
89a36810 1645 goto out_notify_apps;
c20c4267 1646 }
89a36810
AR		 1647
1648 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1649 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1650 rc = memcmp(&res->cfg_entry.resource_address,
1651 &cfg_entry->resource_address,
1652 sizeof(cfg_entry->resource_address));
1653 if (!rc) {
1654 new_entry = 0;
1655 break;
1656 }
1657 }
1658
1659 if (new_entry) {
1660
729c8456
AR		 1661 if (hidden_entry) {
1662 spin_unlock_irqrestore(&pinstance->resource_lock,
1663 lock_flags);
1664 goto out_notify_apps;
1665 }
1666
89a36810
AR		 1667 /* If there are more number of resources than what driver can
1668 * manage, do not notify the applications about the CCN. Just
1669 * ignore this notifications and re-register the same HCAM
1670 */
1671 if (list_empty(&pinstance->free_res_q)) {
1672 spin_unlock_irqrestore(&pinstance->resource_lock,
1673 lock_flags);
1674 pmcraid_err("too many resources attached\n");
1675 spin_lock_irqsave(pinstance->host->host_lock,
1676 host_lock_flags);
1677 pmcraid_send_hcam(pinstance,
1678 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1679 spin_unlock_irqrestore(pinstance->host->host_lock,
1680 host_lock_flags);
1681 return;
1682 }
1683
1684 res = list_entry(pinstance->free_res_q.next,
1685 struct pmcraid_resource_entry, queue);
1686
1687 list_del(&res->queue);
1688 res->scsi_dev = NULL;
1689 res->reset_progress = 0;
1690 list_add_tail(&res->queue, &pinstance->used_res_q);
1691 }
1692
c20c4267 1693 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
89a36810
AR		 1694
1695 if (pinstance->ccn.hcam->notification_type ==
729c8456 1696 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
89a36810 1697 if (res->scsi_dev) {
c20c4267
AR		 1698 if (fw_version <= PMCRAID_FW_VERSION_1)
1699 res->cfg_entry.unique_flags1 &= 0x7F;
1700 else
1701 res->cfg_entry.array_id &= 0xFF;
89a36810
AR		 1702 res->change_detected = RES_CHANGE_DEL;
1703 res->cfg_entry.resource_handle =
1704 PMCRAID_INVALID_RES_HANDLE;
1705 schedule_work(&pinstance->worker_q);
1706 } else {
1707 /* This may be one of the non-exposed resources */
1708 list_move_tail(&res->queue, &pinstance->free_res_q);
1709 }
1710 } else if (!res->scsi_dev) {
1711 res->change_detected = RES_CHANGE_ADD;
1712 schedule_work(&pinstance->worker_q);
1713 }
1714 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1715
1716out_notify_apps:
1717
1718 /* Notify configuration changes to registered applications.*/
1719 if (!pmcraid_disable_aen)
c20c4267 1720 pmcraid_notify_ccn(pinstance);
89a36810
AR		 1721
1722 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1723 if (cmd)
1724 pmcraid_send_hcam_cmd(cmd);
1725}
1726
1727/**
1728 * pmcraid_get_error_info - return error string for an ioasc
1729 * @ioasc: ioasc code
1730 * Return Value
1731 * none
1732 */
1733static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1734{
1735 int i;
1736 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1737 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1738 return &pmcraid_ioasc_error_table[i];
1739 }
1740 return NULL;
1741}
1742
1743/**
1744 * pmcraid_ioasc_logger - log IOASC information based user-settings
1745 * @ioasc: ioasc code
1746 * @cmd: pointer to command that resulted in 'ioasc'
1747 */
1748void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1749{
1750 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1751
1752 if (error_info == NULL ||
1753 cmd->drv_inst->current_log_level < error_info->log_level)
1754 return;
1755
1756 /* log the error string */
c20c4267 1757 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
89a36810
AR		 1758 cmd->ioa_cb->ioarcb.cdb[0],
1759 cmd->ioa_cb->ioarcb.resource_handle,
1760 le32_to_cpu(ioasc), error_info->error_string);
1761}
1762
1763/**
1764 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1765 *
1766 * @pinstance: pointer to per adapter instance structure
1767 *
1768 * Return value:
1769 * none
1770 */
1771static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1772{
1773 struct pmcraid_hcam_ldn *hcam_ldn;
1774 u32 ioasc;
1775
1776 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1777
1778 pmcraid_info
1779 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1780 pinstance->ldn.hcam->ilid,
1781 pinstance->ldn.hcam->op_code,
1782 pinstance->ldn.hcam->notification_type,
1783 pinstance->ldn.hcam->notification_lost,
1784 pinstance->ldn.hcam->flags,
1785 pinstance->ldn.hcam->overlay_id);
1786
1787 /* log only the errors, no need to log informational log entries */
1788 if (pinstance->ldn.hcam->notification_type !=
1789 NOTIFICATION_TYPE_ERROR_LOG)
1790 return;
1791
1792 if (pinstance->ldn.hcam->notification_lost ==
1793 HOSTRCB_NOTIFICATIONS_LOST)
34876402 1794 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
89a36810
AR		 1795
1796 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1797
1798 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1799 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
34876402 1800 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1801 "UnitAttention due to IOA Bus Reset\n");
1802 scsi_report_bus_reset(
1803 pinstance->host,
1804 RES_BUS(hcam_ldn->error_log.fd_ra));
1805 }
1806
1807 return;
1808}
1809
1810/**
1811 * pmcraid_process_ccn - Op done function for a CCN.
1812 * @cmd: pointer to command struct
1813 *
1814 * This function is the op done function for a configuration
1815 * change notification
1816 *
1817 * Return value:
1818 * none
1819 */
1820static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1821{
1822 struct pmcraid_instance *pinstance = cmd->drv_inst;
1823 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1824 unsigned long lock_flags;
1825
1826 pinstance->ccn.cmd = NULL;
1827 pmcraid_return_cmd(cmd);
1828
1829 /* If driver initiated IOA reset happened while this hcam was pending
1830 * with IOA, or IOA bringdown sequence is in progress, no need to
1831 * re-register the hcam
1832 */
1833 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1834 atomic_read(&pinstance->ccn.ignore) == 1) {
1835 return;
1836 } else if (ioasc) {
34876402 1837 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1838 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1839 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1840 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1841 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1842 } else {
1843 pmcraid_handle_config_change(pinstance);
1844 }
1845}
1846
1847/**
1848 * pmcraid_process_ldn - op done function for an LDN
1849 * @cmd: pointer to command block
1850 *
1851 * Return value
1852 * none
1853 */
1854static void pmcraid_initiate_reset(struct pmcraid_instance *);
592488a3 1855static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
89a36810
AR		 1856
1857static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1858{
1859 struct pmcraid_instance *pinstance = cmd->drv_inst;
1860 struct pmcraid_hcam_ldn *ldn_hcam =
1861 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1862 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1863 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1864 unsigned long lock_flags;
1865
1866 /* return the command block back to freepool */
1867 pinstance->ldn.cmd = NULL;
1868 pmcraid_return_cmd(cmd);
1869
1870 /* If driver initiated IOA reset happened while this hcam was pending
1871 * with IOA, no need to re-register the hcam as reset engine will do it
1872 * once reset sequence is complete
1873 */
1874 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1875 atomic_read(&pinstance->ccn.ignore) == 1) {
1876 return;
1877 } else if (!ioasc) {
1878 pmcraid_handle_error_log(pinstance);
1879 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1880 spin_lock_irqsave(pinstance->host->host_lock,
1881 lock_flags);
1882 pmcraid_initiate_reset(pinstance);
1883 spin_unlock_irqrestore(pinstance->host->host_lock,
1884 lock_flags);
1885 return;
1886 }
592488a3
AR		 1887 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1888 pinstance->timestamp_error = 1;
1889 pmcraid_set_timestamp(cmd);
1890 }
89a36810 1891 } else {
34876402 1892 dev_info(&pinstance->pdev->dev,
89a36810
AR		 1893 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1894 }
1895 /* send netlink message for HCAM notification if enabled */
1896 if (!pmcraid_disable_aen)
c20c4267 1897 pmcraid_notify_ldn(pinstance);
89a36810
AR		 1898
1899 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1900 if (cmd)
1901 pmcraid_send_hcam_cmd(cmd);
1902}
1903
1904/**
1905 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1906 *
1907 * @pinstance: pointer per adapter instance structure
1908 *
1909 * Return Value
1910 * none
1911 */
1912static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1913{
1914 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1915 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1916}
1917
1918/**
1919 * pmcraid_unregister_hcams - cancel HCAMs registered already
1920 * @cmd: pointer to command used as part of reset sequence
1921 */
1922static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1923{
1924 struct pmcraid_instance *pinstance = cmd->drv_inst;
1925
1926 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1927 * handling hcam response though it is not necessary. In order to
1928 * prevent this, set 'ignore', so that bring-down sequence doesn't
1929 * re-send any more hcams
1930 */
1931 atomic_set(&pinstance->ccn.ignore, 1);
1932 atomic_set(&pinstance->ldn.ignore, 1);
1933
1934 /* If adapter reset was forced as part of runtime reset sequence,
c20c4267
AR		 1935 * start the reset sequence. Reset will be triggered even in case
1936 * IOA unit_check.
89a36810 1937 */
c20c4267
AR		 1938 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1939 pinstance->ioa_unit_check) {
89a36810 1940 pinstance->force_ioa_reset = 0;
c20c4267 1941 pinstance->ioa_unit_check = 0;
89a36810
AR		 1942 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1943 pmcraid_reset_alert(cmd);
1944 return;
1945 }
1946
1947 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1948 * one after the other. So CCN cancellation will be triggered by
1949 * pmcraid_cancel_ldn itself.
1950 */
1951 pmcraid_cancel_ldn(cmd);
1952}
1953
1954/**
1955 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1956 * @pinstance: pointer to adapter instance structure
1957 * Return Value
1958 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1959 */
1960static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1961
1962static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1963{
1964 u32 intrs;
1965
1966 pmcraid_reinit_buffers(pinstance);
1967 intrs = pmcraid_read_interrupts(pinstance);
1968
1969 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1970
1971 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
c20c4267
AR		 1972 if (!pinstance->interrupt_mode) {
1973 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1974 pinstance->int_regs.
1975 ioa_host_interrupt_mask_reg);
1976 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1977 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1978 }
89a36810
AR		 1979 return 1;
1980 } else {
1981 return 0;
1982 }
1983}
1984
1985/**
1986 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1987 * @cmd : pointer to reset command block
1988 *
1989 * Return Value
1990 * none
1991 */
1992static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1993{
1994 struct pmcraid_instance *pinstance = cmd->drv_inst;
1995 u32 int_reg;
1996 u32 doorbell;
1997
1998 /* There will be an interrupt when Transition to Operational bit is
1999 * set so tasklet would execute next reset task. The timeout handler
2000 * would re-initiate a reset
2001 */
2002 cmd->cmd_done = pmcraid_ioa_reset;
2003 cmd->timer.data = (unsigned long)cmd;
2004 cmd->timer.expires = jiffies +
2005 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
2006 cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
2007
2008 if (!timer_pending(&cmd->timer))
2009 add_timer(&cmd->timer);
2010
2011 /* Enable destructive diagnostics on IOA if it is not yet in
2012 * operational state
2013 */
2014 doorbell = DOORBELL_RUNTIME_RESET |
2015 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
2016
c20c4267
AR		 2017 /* Since we do RESET_ALERT and Start BIST we have to again write
2018 * MSIX Doorbell to indicate the interrupt mode
2019 */
2020 if (pinstance->interrupt_mode) {
2021 iowrite32(DOORBELL_INTR_MODE_MSIX,
2022 pinstance->int_regs.host_ioa_interrupt_reg);
2023 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
2024 }
2025
89a36810 2026 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
c20c4267 2027 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
89a36810 2028 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
c20c4267 2029
89a36810
AR		 2030 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2031 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2032 int_reg);
2033}
2034
2035/**
2036 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2037 *
2038 * @pinstance: pointer to adapter instance structure
2039 *
2040 * Return Value
2041 * none
2042 */
2043static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
2044{
2045 pmcraid_info("%s is not yet implemented\n", __func__);
2046}
2047
2048/**
2049 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2050 * @pinstance: pointer to adapter instance structure
2051 *
2052 * This function fails all outstanding ops. If they are submitted to IOA
2053 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2054 * otherwise just completes the commands and returns the cmd blocks to free
2055 * pool.
2056 *
2057 * Return value:
2058 * none
2059 */
2060static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
2061{
2062 struct pmcraid_cmd *cmd, *temp;
2063 unsigned long lock_flags;
2064
2065 /* pending command list is protected by pending_pool_lock. Its
2066 * traversal must be done as within this lock
2067 */
2068 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2069 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
2070 free_list) {
2071 list_del(&cmd->free_list);
2072 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2073 lock_flags);
2074 cmd->ioa_cb->ioasa.ioasc =
2075 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
2076 cmd->ioa_cb->ioasa.ilid =
2077 cpu_to_be32(PMCRAID_DRIVER_ILID);
2078
2079 /* In case the command timer is still running */
2080 del_timer(&cmd->timer);
2081
2082 /* If this is an IO command, complete it by invoking scsi_done
2083 * function. If this is one of the internal commands other
2084 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2085 * complete it
2086 */
2087 if (cmd->scsi_cmd) {
2088
2089 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2090 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2091
2092 scsi_cmd->result |= DID_ERROR << 16;
2093
2094 scsi_dma_unmap(scsi_cmd);
2095 pmcraid_return_cmd(cmd);
2096
89a36810
AR		 2097 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2098 le32_to_cpu(resp) >> 2,
2099 cmd->ioa_cb->ioarcb.cdb[0],
2100 scsi_cmd->result);
2101 scsi_cmd->scsi_done(scsi_cmd);
2102 } else if (cmd->cmd_done == pmcraid_internal_done ||
2103 cmd->cmd_done == pmcraid_erp_done) {
2104 cmd->cmd_done(cmd);
c20c4267
AR		 2105 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2106 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
89a36810
AR		 2107 pmcraid_return_cmd(cmd);
2108 }
2109
2110 atomic_dec(&pinstance->outstanding_cmds);
2111 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2112 }
2113
2114 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2115}
2116
2117/**
2118 * pmcraid_ioa_reset - Implementation of IOA reset logic
2119 *
2120 * @cmd: pointer to the cmd block to be used for entire reset process
2121 *
2122 * This function executes most of the steps required for IOA reset. This gets
2123 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
25985edc 2124 * 'eh_' thread. Access to variables used for controlling the reset sequence is
89a36810
AR		 2125 * synchronized using host lock. Various functions called during reset process
2126 * would make use of a single command block, pointer to which is also stored in
2127 * adapter instance structure.
2128 *
2129 * Return Value
2130 * None
2131 */
2132static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2133{
2134 struct pmcraid_instance *pinstance = cmd->drv_inst;
2135 u8 reset_complete = 0;
2136
2137 pinstance->ioa_reset_in_progress = 1;
2138
2139 if (pinstance->reset_cmd != cmd) {
2140 pmcraid_err("reset is called with different command block\n");
2141 pinstance->reset_cmd = cmd;
2142 }
2143
2144 pmcraid_info("reset_engine: state = %d, command = %p\n",
2145 pinstance->ioa_state, cmd);
2146
2147 switch (pinstance->ioa_state) {
2148
2149 case IOA_STATE_DEAD:
2150 /* If IOA is offline, whatever may be the reset reason, just
2151 * return. callers might be waiting on the reset wait_q, wake
2152 * up them
2153 */
2154 pmcraid_err("IOA is offline no reset is possible\n");
2155 reset_complete = 1;
2156 break;
2157
2158 case IOA_STATE_IN_BRINGDOWN:
2159 /* we enter here, once ioa shutdown command is processed by IOA
2160 * Alert IOA for a possible reset. If reset alert fails, IOA
2161 * goes through hard-reset
2162 */
2163 pmcraid_disable_interrupts(pinstance, ~0);
2164 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2165 pmcraid_reset_alert(cmd);
2166 break;
2167
2168 case IOA_STATE_UNKNOWN:
2169 /* We may be called during probe or resume. Some pre-processing
2170 * is required for prior to reset
2171 */
2172 scsi_block_requests(pinstance->host);
2173
2174 /* If asked to reset while IOA was processing responses or
2175 * there are any error responses then IOA may require
2176 * hard-reset.
2177 */
2178 if (pinstance->ioa_hard_reset == 0) {
2179 if (ioread32(pinstance->ioa_status) &
2180 INTRS_TRANSITION_TO_OPERATIONAL) {
2181 pmcraid_info("sticky bit set, bring-up\n");
2182 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2183 pmcraid_reinit_cmdblk(cmd);
2184 pmcraid_identify_hrrq(cmd);
2185 } else {
2186 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2187 pmcraid_soft_reset(cmd);
2188 }
2189 } else {
2190 /* Alert IOA of a possible reset and wait for critical
2191 * operation in progress bit to reset
2192 */
2193 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2194 pmcraid_reset_alert(cmd);
2195 }
2196 break;
2197
2198 case IOA_STATE_IN_RESET_ALERT:
2199 /* If critical operation in progress bit is reset or wait gets
2200 * timed out, reset proceeds with starting BIST on the IOA.
2201 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2202 * they are 3 or more, reset engine marks IOA dead and returns
2203 */
2204 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2205 pmcraid_start_bist(cmd);
2206 break;
2207
2208 case IOA_STATE_IN_HARD_RESET:
2209 pinstance->ioa_reset_attempts++;
2210
2211 /* retry reset if we haven't reached maximum allowed limit */
2212 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2213 pinstance->ioa_reset_attempts = 0;
2214 pmcraid_err("IOA didn't respond marking it as dead\n");
2215 pinstance->ioa_state = IOA_STATE_DEAD;
c20c4267
AR		 2216
2217 if (pinstance->ioa_bringdown)
2218 pmcraid_notify_ioastate(pinstance,
2219 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2220 else
2221 pmcraid_notify_ioastate(pinstance,
2222 PMC_DEVICE_EVENT_RESET_FAILED);
89a36810
AR		 2223 reset_complete = 1;
2224 break;
2225 }
2226
2227 /* Once either bist or pci reset is done, restore PCI config
2228 * space. If this fails, proceed with hard reset again
2229 */
1d3c16a8 2230 pci_restore_state(pinstance->pdev);
89a36810
AR		 2231
2232 /* fail all pending commands */
2233 pmcraid_fail_outstanding_cmds(pinstance);
2234
2235 /* check if unit check is active, if so extract dump */
2236 if (pinstance->ioa_unit_check) {
2237 pmcraid_info("unit check is active\n");
2238 pinstance->ioa_unit_check = 0;
2239 pmcraid_get_dump(pinstance);
2240 pinstance->ioa_reset_attempts--;
2241 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2242 pmcraid_reset_alert(cmd);
2243 break;
2244 }
2245
2246 /* if the reset reason is to bring-down the ioa, we might be
2247 * done with the reset restore pci_config_space and complete
2248 * the reset
2249 */
2250 if (pinstance->ioa_bringdown) {
2251 pmcraid_info("bringing down the adapter\n");
2252 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2253 pinstance->ioa_bringdown = 0;
2254 pinstance->ioa_state = IOA_STATE_UNKNOWN;
c20c4267
AR		 2255 pmcraid_notify_ioastate(pinstance,
2256 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
89a36810
AR		 2257 reset_complete = 1;
2258 } else {
2259 /* bring-up IOA, so proceed with soft reset
2260 * Reinitialize hrrq_buffers and their indices also
2261 * enable interrupts after a pci_restore_state
2262 */
2263 if (pmcraid_reset_enable_ioa(pinstance)) {
2264 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2265 pmcraid_info("bringing up the adapter\n");
2266 pmcraid_reinit_cmdblk(cmd);
2267 pmcraid_identify_hrrq(cmd);
2268 } else {
2269 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2270 pmcraid_soft_reset(cmd);
2271 }
2272 }
2273 break;
2274
2275 case IOA_STATE_IN_SOFT_RESET:
2276 /* TRANSITION TO OPERATIONAL is on so start initialization
2277 * sequence
2278 */
2279 pmcraid_info("In softreset proceeding with bring-up\n");
2280 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2281
2282 /* Initialization commands start with HRRQ identification. From
2283 * now on tasklet completes most of the commands as IOA is up
2284 * and intrs are enabled
2285 */
2286 pmcraid_identify_hrrq(cmd);
2287 break;
2288
2289 case IOA_STATE_IN_BRINGUP:
2290 /* we are done with bringing up of IOA, change the ioa_state to
2291 * operational and wake up any waiters
2292 */
2293 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2294 reset_complete = 1;
2295 break;
2296
2297 case IOA_STATE_OPERATIONAL:
2298 default:
2299 /* When IOA is operational and a reset is requested, check for
2300 * the reset reason. If reset is to bring down IOA, unregister
2301 * HCAMs and initiate shutdown; if adapter reset is forced then
2302 * restart reset sequence again
2303 */
2304 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2305 pinstance->force_ioa_reset == 0) {
c20c4267
AR		 2306 pmcraid_notify_ioastate(pinstance,
2307 PMC_DEVICE_EVENT_RESET_SUCCESS);
89a36810
AR		 2308 reset_complete = 1;
2309 } else {
2310 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2311 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2312 pmcraid_reinit_cmdblk(cmd);
2313 pmcraid_unregister_hcams(cmd);
2314 }
2315 break;
2316 }
2317
2318 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2319 * OPERATIONAL. Reset all control variables used during reset, wake up
2320 * any waiting threads and let the SCSI mid-layer send commands. Note
2321 * that host_lock must be held before invoking scsi_report_bus_reset.
2322 */
2323 if (reset_complete) {
2324 pinstance->ioa_reset_in_progress = 0;
2325 pinstance->ioa_reset_attempts = 0;
2326 pinstance->reset_cmd = NULL;
2327 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2328 pinstance->ioa_bringdown = 0;
2329 pmcraid_return_cmd(cmd);
2330
2331 /* If target state is to bring up the adapter, proceed with
2332 * hcam registration and resource exposure to mid-layer.
2333 */
2334 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2335 pmcraid_register_hcams(pinstance);
2336
2337 wake_up_all(&pinstance->reset_wait_q);
2338 }
2339
2340 return;
2341}
2342
2343/**
2344 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2345 * ISR/tasklet during error interrupts including IOA unit check. If reset
2346 * is already in progress, it just returns, otherwise initiates IOA reset
2347 * to bring IOA up to operational state.
2348 *
2349 * @pinstance: pointer to adapter instance structure
2350 *
2351 * Return value
2352 * none
2353 */
2354static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2355{
2356 struct pmcraid_cmd *cmd;
2357
2358 /* If the reset is already in progress, just return, otherwise start
2359 * reset sequence and return
2360 */
2361 if (!pinstance->ioa_reset_in_progress) {
2362 scsi_block_requests(pinstance->host);
2363 cmd = pmcraid_get_free_cmd(pinstance);
2364
2365 if (cmd == NULL) {
2366 pmcraid_err("no cmnd blocks for initiate_reset\n");
2367 return;
2368 }
2369
2370 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2371 pinstance->reset_cmd = cmd;
2372 pinstance->force_ioa_reset = 1;
c20c4267
AR		 2373 pmcraid_notify_ioastate(pinstance,
2374 PMC_DEVICE_EVENT_RESET_START);
89a36810
AR		 2375 pmcraid_ioa_reset(cmd);
2376 }
2377}
2378
2379/**
2380 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2381 * or bringdown IOA
2382 * @pinstance: pointer adapter instance structure
2383 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2384 * @target_state: expected target state after reset
2385 *
2386 * Note: This command initiates reset and waits for its completion. Hence this
2387 * should not be called from isr/timer/tasklet functions (timeout handlers,
2388 * error response handlers and interrupt handlers).
2389 *
2390 * Return Value
2391 * 1 in case ioa_state is not target_state, 0 otherwise.
2392 */
2393static int pmcraid_reset_reload(
2394 struct pmcraid_instance *pinstance,
2395 u8 shutdown_type,
2396 u8 target_state
2397)
2398{
2399 struct pmcraid_cmd *reset_cmd = NULL;
2400 unsigned long lock_flags;
2401 int reset = 1;
2402
2403 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2404
2405 if (pinstance->ioa_reset_in_progress) {
2406 pmcraid_info("reset_reload: reset is already in progress\n");
2407
2408 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2409
2410 wait_event(pinstance->reset_wait_q,
2411 !pinstance->ioa_reset_in_progress);
2412
2413 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2414
2415 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2416 spin_unlock_irqrestore(pinstance->host->host_lock,
2417 lock_flags);
2418 pmcraid_info("reset_reload: IOA is dead\n");
2419 return reset;
2420 } else if (pinstance->ioa_state == target_state) {
2421 reset = 0;
2422 }
2423 }
2424
2425 if (reset) {
2426 pmcraid_info("reset_reload: proceeding with reset\n");
2427 scsi_block_requests(pinstance->host);
2428 reset_cmd = pmcraid_get_free_cmd(pinstance);
2429
2430 if (reset_cmd == NULL) {
2431 pmcraid_err("no free cmnd for reset_reload\n");
2432 spin_unlock_irqrestore(pinstance->host->host_lock,
2433 lock_flags);
2434 return reset;
2435 }
2436
2437 if (shutdown_type == SHUTDOWN_NORMAL)
2438 pinstance->ioa_bringdown = 1;
2439
2440 pinstance->ioa_shutdown_type = shutdown_type;
2441 pinstance->reset_cmd = reset_cmd;
2442 pinstance->force_ioa_reset = reset;
2443 pmcraid_info("reset_reload: initiating reset\n");
2444 pmcraid_ioa_reset(reset_cmd);
2445 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2446 pmcraid_info("reset_reload: waiting for reset to complete\n");
2447 wait_event(pinstance->reset_wait_q,
2448 !pinstance->ioa_reset_in_progress);
2449
c20c4267 2450 pmcraid_info("reset_reload: reset is complete !!\n");
89a36810
AR		 2451 scsi_unblock_requests(pinstance->host);
2452 if (pinstance->ioa_state == target_state)
2453 reset = 0;
2454 }
2455
2456 return reset;
2457}
2458
2459/**
2460 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2461 *
2462 * @pinstance: pointer to adapter instance structure
2463 *
2464 * Return Value
2465 * whatever is returned from pmcraid_reset_reload
2466 */
2467static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2468{
2469 return pmcraid_reset_reload(pinstance,
2470 SHUTDOWN_NORMAL,
2471 IOA_STATE_UNKNOWN);
2472}
2473
2474/**
2475 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2476 *
2477 * @pinstance: pointer to adapter instance structure
2478 *
2479 * Return Value
2480 * whatever is returned from pmcraid_reset_reload
2481 */
2482static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2483{
c20c4267
AR		 2484 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2485
89a36810
AR		 2486 return pmcraid_reset_reload(pinstance,
2487 SHUTDOWN_NONE,
2488 IOA_STATE_OPERATIONAL);
2489}
2490
2491/**
2492 * pmcraid_request_sense - Send request sense to a device
2493 * @cmd: pmcraid command struct
2494 *
2495 * This function sends a request sense to a device as a result of a check
2496 * condition. This method re-uses the same command block that failed earlier.
2497 */
2498static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2499{
2500 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2501 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2502
2503 /* allocate DMAable memory for sense buffers */
2504 cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
2505 SCSI_SENSE_BUFFERSIZE,
2506 &cmd->sense_buffer_dma);
2507
2508 if (cmd->sense_buffer == NULL) {
2509 pmcraid_err
2510 ("couldn't allocate sense buffer for request sense\n");
2511 pmcraid_erp_done(cmd);
2512 return;
2513 }
2514
2515 /* re-use the command block */
2516 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2517 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2518 ioarcb->request_flags0 = (SYNC_COMPLETE |
2519 NO_LINK_DESCS |
2520 INHIBIT_UL_CHECK);
2521 ioarcb->request_type = REQ_TYPE_SCSI;
2522 ioarcb->cdb[0] = REQUEST_SENSE;
2523 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2524
2525 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2526 offsetof(struct pmcraid_ioarcb,
2527 add_data.u.ioadl[0]));
2528 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2529
2530 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2531
2532 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2533 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
88197966 2534 ioadl->flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 2535
2536 /* request sense might be called as part of error response processing
2537 * which runs in tasklets context. It is possible that mid-layer might
2538 * schedule queuecommand during this time, hence, writting to IOARRIN
2539 * must be protect by host_lock
2540 */
2541 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2542 PMCRAID_REQUEST_SENSE_TIMEOUT,
2543 pmcraid_timeout_handler);
2544}
2545
2546/**
2547 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2548 * @cmd: command that failed
2549 * @sense: true if request_sense is required after cancel all
2550 *
2551 * This function sends a cancel all to a device to clear the queue.
2552 */
2553static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
2554{
2555 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2556 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2557 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2558 void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
2559 : pmcraid_request_sense;
2560
2561 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2562 ioarcb->request_flags0 = SYNC_OVERRIDE;
2563 ioarcb->request_type = REQ_TYPE_IOACMD;
2564 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2565
2566 if (RES_IS_GSCSI(res->cfg_entry))
2567 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2568
2569 ioarcb->ioadl_bus_addr = 0;
2570 ioarcb->ioadl_length = 0;
2571 ioarcb->data_transfer_length = 0;
2572 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
2573
2574 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2575 * schedule queuecommand while we are doing this
2576 */
2577 pmcraid_send_cmd(cmd, cmd_done,
2578 PMCRAID_REQUEST_SENSE_TIMEOUT,
2579 pmcraid_timeout_handler);
2580}
2581
2582/**
2583 * pmcraid_frame_auto_sense: frame fixed format sense information
2584 *
2585 * @cmd: pointer to failing command block
2586 *
2587 * Return value
2588 * none
2589 */
2590static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2591{
2592 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2593 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2594 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2595 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2596 u32 failing_lba = 0;
2597
2598 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2599 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2600
2601 if (RES_IS_VSET(res->cfg_entry) &&
2602 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2603 ioasa->u.vset.failing_lba_hi != 0) {
2604
2605 sense_buf[0] = 0x72;
2606 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2607 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2608 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2609
2610 sense_buf[7] = 12;
2611 sense_buf[8] = 0;
2612 sense_buf[9] = 0x0A;
2613 sense_buf[10] = 0x80;
2614
2615 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2616
2617 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2618 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2619 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2620 sense_buf[15] = failing_lba & 0x000000ff;
2621
2622 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2623
2624 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2625 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2626 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2627 sense_buf[19] = failing_lba & 0x000000ff;
2628 } else {
2629 sense_buf[0] = 0x70;
2630 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2631 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2632 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2633
2634 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2635 if (RES_IS_VSET(res->cfg_entry))
2636 failing_lba =
2637 le32_to_cpu(ioasa->u.
2638 vset.failing_lba_lo);
2639 sense_buf[0] |= 0x80;
2640 sense_buf[3] = (failing_lba >> 24) & 0xff;
2641 sense_buf[4] = (failing_lba >> 16) & 0xff;
2642 sense_buf[5] = (failing_lba >> 8) & 0xff;
2643 sense_buf[6] = failing_lba & 0xff;
2644 }
2645
2646 sense_buf[7] = 6; /* additional length */
2647 }
2648}
2649
2650/**
2651 * pmcraid_error_handler - Error response handlers for a SCSI op
2652 * @cmd: pointer to pmcraid_cmd that has failed
2653 *
2654 * This function determines whether or not to initiate ERP on the affected
2655 * device. This is called from a tasklet, which doesn't hold any locks.
2656 *
2657 * Return value:
2658 * 0 it caller can complete the request, otherwise 1 where in error
2659 * handler itself completes the request and returns the command block
2660 * back to free-pool
2661 */
2662static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2663{
2664 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2665 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2666 struct pmcraid_instance *pinstance = cmd->drv_inst;
2667 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2668 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2669 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2670 u32 sense_copied = 0;
2671
2672 if (!res) {
2673 pmcraid_info("resource pointer is NULL\n");
2674 return 0;
2675 }
2676
2677 /* If this was a SCSI read/write command keep count of errors */
2678 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2679 atomic_inc(&res->read_failures);
2680 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2681 atomic_inc(&res->write_failures);
2682
2683 if (!RES_IS_GSCSI(res->cfg_entry) &&
2684 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2685 pmcraid_frame_auto_sense(cmd);
2686 }
2687
2688 /* Log IOASC/IOASA information based on user settings */
2689 pmcraid_ioasc_logger(ioasc, cmd);
2690
2691 switch (masked_ioasc) {
2692
2693 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2694 scsi_cmd->result |= (DID_ABORT << 16);
2695 break;
2696
2697 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2698 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2699 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2700 break;
2701
2702 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2703 res->sync_reqd = 1;
2704 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2705 break;
2706
2707 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2708 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2709 break;
2710
2711 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2712 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2713 if (!res->reset_progress)
2714 scsi_report_bus_reset(pinstance->host,
2715 scsi_cmd->device->channel);
2716 scsi_cmd->result |= (DID_ERROR << 16);
2717 break;
2718
2719 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2720 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2721 res->sync_reqd = 1;
2722
2723 /* if check_condition is not active return with error otherwise
2724 * get/frame the sense buffer
2725 */
2726 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2727 SAM_STAT_CHECK_CONDITION &&
2728 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2729 return 0;
2730
2731 /* If we have auto sense data as part of IOASA pass it to
2732 * mid-layer
2733 */
2734 if (ioasa->auto_sense_length != 0) {
2735 short sense_len = ioasa->auto_sense_length;
2736 int data_size = min_t(u16, le16_to_cpu(sense_len),
2737 SCSI_SENSE_BUFFERSIZE);
2738
2739 memcpy(scsi_cmd->sense_buffer,
2740 ioasa->sense_data,
2741 data_size);
2742 sense_copied = 1;
2743 }
2744
a70757ba 2745 if (RES_IS_GSCSI(res->cfg_entry))
89a36810 2746 pmcraid_cancel_all(cmd, sense_copied);
a70757ba 2747 else if (sense_copied)
89a36810 2748 pmcraid_erp_done(cmd);
a70757ba 2749 else
89a36810 2750 pmcraid_request_sense(cmd);
89a36810
AR		 2751
2752 return 1;
2753
2754 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2755 break;
2756
2757 default:
2758 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2759 scsi_cmd->result |= (DID_ERROR << 16);
2760 break;
2761 }
2762 return 0;
2763}
2764
2765/**
2766 * pmcraid_reset_device - device reset handler functions
2767 *
2768 * @scsi_cmd: scsi command struct
2769 * @modifier: reset modifier indicating the reset sequence to be performed
2770 *
2771 * This function issues a device reset to the affected device.
2772 * A LUN reset will be sent to the device first. If that does
2773 * not work, a target reset will be sent.
2774 *
2775 * Return value:
2776 * SUCCESS / FAILED
2777 */
2778static int pmcraid_reset_device(
2779 struct scsi_cmnd *scsi_cmd,
2780 unsigned long timeout,
2781 u8 modifier
2782)
2783{
2784 struct pmcraid_cmd *cmd;
2785 struct pmcraid_instance *pinstance;
2786 struct pmcraid_resource_entry *res;
2787 struct pmcraid_ioarcb *ioarcb;
2788 unsigned long lock_flags;
2789 u32 ioasc;
2790
2791 pinstance =
2792 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2793 res = scsi_cmd->device->hostdata;
2794
2795 if (!res) {
34876402
AR		 2796 sdev_printk(KERN_ERR, scsi_cmd->device,
2797 "reset_device: NULL resource pointer\n");
89a36810
AR		 2798 return FAILED;
2799 }
2800
2801 /* If adapter is currently going through reset/reload, return failed.
2802 * This will force the mid-layer to call _eh_bus/host reset, which
2803 * will then go to sleep and wait for the reset to complete
2804 */
2805 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2806 if (pinstance->ioa_reset_in_progress ||
2807 pinstance->ioa_state == IOA_STATE_DEAD) {
2808 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2809 return FAILED;
2810 }
2811
2812 res->reset_progress = 1;
2813 pmcraid_info("Resetting %s resource with addr %x\n",
2814 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2815 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2816 le32_to_cpu(res->cfg_entry.resource_address));
2817
2818 /* get a free cmd block */
2819 cmd = pmcraid_get_free_cmd(pinstance);
2820
2821 if (cmd == NULL) {
2822 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2823 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2824 return FAILED;
2825 }
2826
2827 ioarcb = &cmd->ioa_cb->ioarcb;
2828 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2829 ioarcb->request_type = REQ_TYPE_IOACMD;
2830 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2831
2832 /* Initialize reset modifier bits */
2833 if (modifier)
2834 modifier = ENABLE_RESET_MODIFIER | modifier;
2835
2836 ioarcb->cdb[1] = modifier;
2837
2838 init_completion(&cmd->wait_for_completion);
2839 cmd->completion_req = 1;
2840
2841 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2842 cmd->ioa_cb->ioarcb.cdb[0],
2843 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2844 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2845
2846 pmcraid_send_cmd(cmd,
2847 pmcraid_internal_done,
2848 timeout,
2849 pmcraid_timeout_handler);
2850
2851 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2852
2853 /* RESET_DEVICE command completes after all pending IOARCBs are
2854 * completed. Once this command is completed, pmcraind_internal_done
2855 * will wake up the 'completion' queue.
2856 */
2857 wait_for_completion(&cmd->wait_for_completion);
2858
2859 /* complete the command here itself and return the command block
2860 * to free list
2861 */
2862 pmcraid_return_cmd(cmd);
2863 res->reset_progress = 0;
2864 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2865
2866 /* set the return value based on the returned ioasc */
2867 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2868}
2869
2870/**
2871 * _pmcraid_io_done - helper for pmcraid_io_done function
2872 *
2873 * @cmd: pointer to pmcraid command struct
2874 * @reslen: residual data length to be set in the ioasa
2875 * @ioasc: ioasc either returned by IOA or set by driver itself.
2876 *
2877 * This function is invoked by pmcraid_io_done to complete mid-layer
2878 * scsi ops.
2879 *
2880 * Return value:
2881 * 0 if caller is required to return it to free_pool. Returns 1 if
2882 * caller need not worry about freeing command block as error handler
2883 * will take care of that.
2884 */
2885
2886static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2887{
2888 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2889 int rc = 0;
2890
2891 scsi_set_resid(scsi_cmd, reslen);
2892
2893 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2894 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2895 cmd->ioa_cb->ioarcb.cdb[0],
2896 ioasc, scsi_cmd->result);
2897
2898 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2899 rc = pmcraid_error_handler(cmd);
2900
2901 if (rc == 0) {
2902 scsi_dma_unmap(scsi_cmd);
2903 scsi_cmd->scsi_done(scsi_cmd);
2904 }
2905
2906 return rc;
2907}
2908
2909/**
2910 * pmcraid_io_done - SCSI completion function
2911 *
2912 * @cmd: pointer to pmcraid command struct
2913 *
2914 * This function is invoked by tasklet/mid-layer error handler to completing
2915 * the SCSI ops sent from mid-layer.
2916 *
2917 * Return value
2918 * none
2919 */
2920
2921static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2922{
2923 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2924 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2925
2926 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2927 pmcraid_return_cmd(cmd);
2928}
2929
2930/**
2931 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2932 *
2933 * @cmd: command block of the command to be aborted
2934 *
2935 * Return Value:
2936 * returns pointer to command structure used as cancelling cmd
2937 */
2938static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2939{
2940 struct pmcraid_cmd *cancel_cmd;
2941 struct pmcraid_instance *pinstance;
2942 struct pmcraid_resource_entry *res;
2943
2944 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2945 res = cmd->scsi_cmd->device->hostdata;
2946
2947 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2948
2949 if (cancel_cmd == NULL) {
2950 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2951 return NULL;
2952 }
2953
2954 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2955
2956 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2957 cmd->ioa_cb->ioarcb.cdb[0],
2958 cmd->ioa_cb->ioarcb.response_handle >> 2);
2959
2960 init_completion(&cancel_cmd->wait_for_completion);
2961 cancel_cmd->completion_req = 1;
2962
2963 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2964 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
c20c4267 2965 cancel_cmd->ioa_cb->ioarcb.cdb[0],
89a36810
AR		 2966 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2967
2968 pmcraid_send_cmd(cancel_cmd,
2969 pmcraid_internal_done,
2970 PMCRAID_INTERNAL_TIMEOUT,
2971 pmcraid_timeout_handler);
2972 return cancel_cmd;
2973}
2974
2975/**
2976 * pmcraid_abort_complete - Waits for ABORT TASK completion
2977 *
2978 * @cancel_cmd: command block use as cancelling command
2979 *
2980 * Return Value:
2981 * returns SUCCESS if ABORT TASK has good completion
2982 * otherwise FAILED
2983 */
2984static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2985{
2986 struct pmcraid_resource_entry *res;
2987 u32 ioasc;
2988
2989 wait_for_completion(&cancel_cmd->wait_for_completion);
c20c4267
AR		 2990 res = cancel_cmd->res;
2991 cancel_cmd->res = NULL;
89a36810
AR		 2992 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2993
2994 /* If the abort task is not timed out we will get a Good completion
2995 * as sense_key, otherwise we may get one the following responses
25985edc 2996 * due to subsequent bus reset or device reset. In case IOASC is
89a36810
AR		 2997 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2998 */
2999 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
3000 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
3001 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
3002 res->sync_reqd = 1;
3003 ioasc = 0;
3004 }
3005
3006 /* complete the command here itself */
3007 pmcraid_return_cmd(cancel_cmd);
3008 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
3009}
3010
3011/**
3012 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3013 *
3014 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3015 * mid-layer ensures that no other commands are queued. This
3016 * never gets called under interrupt, but a separate eh thread.
3017 *
3018 * Return value:
3019 * SUCCESS / FAILED
3020 */
3021static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
3022{
3023 struct pmcraid_instance *pinstance;
3024 struct pmcraid_cmd *cmd;
3025 struct pmcraid_resource_entry *res;
3026 unsigned long host_lock_flags;
3027 unsigned long pending_lock_flags;
3028 struct pmcraid_cmd *cancel_cmd = NULL;
3029 int cmd_found = 0;
3030 int rc = FAILED;
3031
3032 pinstance =
3033 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3034
34876402
AR		 3035 scmd_printk(KERN_INFO, scsi_cmd,
3036 "I/O command timed out, aborting it.\n");
89a36810
AR		 3037
3038 res = scsi_cmd->device->hostdata;
3039
3040 if (res == NULL)
3041 return rc;
3042
3043 /* If we are currently going through reset/reload, return failed.
3044 * This will force the mid-layer to eventually call
3045 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3046 * reset to complete
3047 */
3048 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
3049
3050 if (pinstance->ioa_reset_in_progress ||
3051 pinstance->ioa_state == IOA_STATE_DEAD) {
3052 spin_unlock_irqrestore(pinstance->host->host_lock,
3053 host_lock_flags);
3054 return rc;
3055 }
3056
3057 /* loop over pending cmd list to find cmd corresponding to this
3058 * scsi_cmd. Note that this command might not have been completed
3059 * already. locking: all pending commands are protected with
3060 * pending_pool_lock.
3061 */
3062 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
3063 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
3064
3065 if (cmd->scsi_cmd == scsi_cmd) {
3066 cmd_found = 1;
3067 break;
3068 }
3069 }
3070
3071 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3072 pending_lock_flags);
3073
3074 /* If the command to be aborted was given to IOA and still pending with
3075 * it, send ABORT_TASK to abort this and wait for its completion
3076 */
3077 if (cmd_found)
3078 cancel_cmd = pmcraid_abort_cmd(cmd);
3079
3080 spin_unlock_irqrestore(pinstance->host->host_lock,
3081 host_lock_flags);
3082
3083 if (cancel_cmd) {
c20c4267 3084 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
89a36810
AR		 3085 rc = pmcraid_abort_complete(cancel_cmd);
3086 }
3087
3088 return cmd_found ? rc : SUCCESS;
3089}
3090
3091/**
3092 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3093 *
3094 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3095 *
3096 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3097 * Since these are called from mid-layer EH thread, no other IO will be queued
3098 * to the resource being reset. However, control path (IOCTL) may be active so
3099 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3100 * takes care by locking/unlocking host_lock.
3101 *
3102 * Return value
c20c4267 3103 * SUCCESS or FAILED
89a36810
AR		 3104 */
3105static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3106{
34876402
AR		 3107 scmd_printk(KERN_INFO, scmd,
3108 "resetting device due to an I/O command timeout.\n");
89a36810
AR		 3109 return pmcraid_reset_device(scmd,
3110 PMCRAID_INTERNAL_TIMEOUT,
3111 RESET_DEVICE_LUN);
3112}
3113
3114static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3115{
34876402
AR		 3116 scmd_printk(KERN_INFO, scmd,
3117 "Doing bus reset due to an I/O command timeout.\n");
89a36810
AR		 3118 return pmcraid_reset_device(scmd,
3119 PMCRAID_RESET_BUS_TIMEOUT,
3120 RESET_DEVICE_BUS);
3121}
3122
3123static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3124{
34876402
AR		 3125 scmd_printk(KERN_INFO, scmd,
3126 "Doing target reset due to an I/O command timeout.\n");
89a36810
AR		 3127 return pmcraid_reset_device(scmd,
3128 PMCRAID_INTERNAL_TIMEOUT,
3129 RESET_DEVICE_TARGET);
3130}
3131
3132/**
3133 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3134 *
3135 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3136 *
3137 * Initiates adapter reset to bring it up to operational state
3138 *
3139 * Return value
c20c4267 3140 * SUCCESS or FAILED
89a36810
AR		 3141 */
3142static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3143{
3144 unsigned long interval = 10000; /* 10 seconds interval */
3145 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3146 struct pmcraid_instance *pinstance =
3147 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3148
3149
3150 /* wait for an additional 150 seconds just in case firmware could come
3151 * up and if it could complete all the pending commands excluding the
3152 * two HCAM (CCN and LDN).
3153 */
3154 while (waits--) {
3155 if (atomic_read(&pinstance->outstanding_cmds) <=
3156 PMCRAID_MAX_HCAM_CMD)
3157 return SUCCESS;
3158 msleep(interval);
3159 }
3160
3161 dev_err(&pinstance->pdev->dev,
3162 "Adapter being reset due to an I/O command timeout.\n");
3163 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3164}
3165
3166/**
3167 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3168 * @scsi_cmd: scsi command struct
3169 *
3170 * Return value
3171 * number of tags or 0 if the task is not tagged
3172 */
3173static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
3174{
3175 char tag[2];
3176 u8 rc = 0;
3177
3178 if (scsi_populate_tag_msg(scsi_cmd, tag)) {
3179 switch (tag[0]) {
3180 case MSG_SIMPLE_TAG:
3181 rc = TASK_TAG_SIMPLE;
3182 break;
3183 case MSG_HEAD_TAG:
3184 rc = TASK_TAG_QUEUE_HEAD;
3185 break;
3186 case MSG_ORDERED_TAG:
3187 rc = TASK_TAG_ORDERED;
3188 break;
3189 };
3190 }
3191
3192 return rc;
3193}
3194
3195
3196/**
3197 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3198 * @cmd: pmcraid command struct
3199 * @sgcount: count of scatter-gather elements
3200 *
3201 * Return value
3202 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3203 * or external IOADLs
3204 */
3205struct pmcraid_ioadl_desc *
3206pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3207{
3208 struct pmcraid_ioadl_desc *ioadl;
3209 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3210 int ioadl_count = 0;
3211
3212 if (ioarcb->add_cmd_param_length)
3213 ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
3214 ioarcb->ioadl_length =
3215 sizeof(struct pmcraid_ioadl_desc) * sgcount;
3216
3217 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3218 /* external ioadls start at offset 0x80 from control_block
3219 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3220 * It is necessary to indicate to firmware that driver is
3221 * using ioadls to be treated as external to IOARCB.
3222 */
3223 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
3224 ioarcb->ioadl_bus_addr =
3225 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3226 offsetof(struct pmcraid_ioarcb,
3227 add_data.u.ioadl[3]));
3228 ioadl = &ioarcb->add_data.u.ioadl[3];
3229 } else {
3230 ioarcb->ioadl_bus_addr =
3231 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3232 offsetof(struct pmcraid_ioarcb,
3233 add_data.u.ioadl[ioadl_count]));
3234
3235 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3236 ioarcb->ioarcb_bus_addr |=
3237 DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
3238 }
3239
3240 return ioadl;
3241}
3242
3243/**
3244 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3245 * @pinstance: pointer to adapter instance structure
3246 * @cmd: pmcraid command struct
3247 *
3248 * This function is invoked by queuecommand entry point while sending a command
3249 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3250 *
3251 * Return value:
c20c4267 3252 * 0 on success or -1 on failure
89a36810
AR		 3253 */
3254static int pmcraid_build_ioadl(
3255 struct pmcraid_instance *pinstance,
3256 struct pmcraid_cmd *cmd
3257)
3258{
3259 int i, nseg;
3260 struct scatterlist *sglist;
3261
3262 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3263 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3264 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
3265
3266 u32 length = scsi_bufflen(scsi_cmd);
3267
3268 if (!length)
3269 return 0;
3270
3271 nseg = scsi_dma_map(scsi_cmd);
3272
3273 if (nseg < 0) {
34876402 3274 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
89a36810
AR		 3275 return -1;
3276 } else if (nseg > PMCRAID_MAX_IOADLS) {
3277 scsi_dma_unmap(scsi_cmd);
34876402 3278 scmd_printk(KERN_ERR, scsi_cmd,
89a36810
AR		 3279 "sg count is (%d) more than allowed!\n", nseg);
3280 return -1;
3281 }
3282
3283 /* Initialize IOARCB data transfer length fields */
3284 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3285 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3286
3287 ioarcb->request_flags0 |= NO_LINK_DESCS;
3288 ioarcb->data_transfer_length = cpu_to_le32(length);
3289 ioadl = pmcraid_init_ioadls(cmd, nseg);
3290
3291 /* Initialize IOADL descriptor addresses */
3292 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3293 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3294 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3295 ioadl[i].flags = 0;
3296 }
3297 /* setup last descriptor */
88197966 3298 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 3299
3300 return 0;
3301}
3302
3303/**
3304 * pmcraid_free_sglist - Frees an allocated SG buffer list
3305 * @sglist: scatter/gather list pointer
3306 *
3307 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3308 *
3309 * Return value:
c20c4267 3310 * none
89a36810
AR		 3311 */
3312static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3313{
3314 int i;
3315
3316 for (i = 0; i < sglist->num_sg; i++)
3317 __free_pages(sg_page(&(sglist->scatterlist[i])),
3318 sglist->order);
3319
3320 kfree(sglist);
3321}
3322
3323/**
3324 * pmcraid_alloc_sglist - Allocates memory for a SG list
3325 * @buflen: buffer length
3326 *
3327 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3328 * list.
3329 *
3330 * Return value
c20c4267 3331 * pointer to sglist / NULL on failure
89a36810
AR		 3332 */
3333static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3334{
3335 struct pmcraid_sglist *sglist;
3336 struct scatterlist *scatterlist;
3337 struct page *page;
3338 int num_elem, i, j;
3339 int sg_size;
3340 int order;
3341 int bsize_elem;
3342
3343 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3344 order = (sg_size > 0) ? get_order(sg_size) : 0;
3345 bsize_elem = PAGE_SIZE * (1 << order);
3346
3347 /* Determine the actual number of sg entries needed */
3348 if (buflen % bsize_elem)
3349 num_elem = (buflen / bsize_elem) + 1;
3350 else
3351 num_elem = buflen / bsize_elem;
3352
3353 /* Allocate a scatter/gather list for the DMA */
3354 sglist = kzalloc(sizeof(struct pmcraid_sglist) +
3355 (sizeof(struct scatterlist) * (num_elem - 1)),
3356 GFP_KERNEL);
3357
3358 if (sglist == NULL)
3359 return NULL;
3360
3361 scatterlist = sglist->scatterlist;
3362 sg_init_table(scatterlist, num_elem);
3363 sglist->order = order;
3364 sglist->num_sg = num_elem;
3365 sg_size = buflen;
3366
3367 for (i = 0; i < num_elem; i++) {
592488a3 3368 page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
89a36810
AR		 3369 if (!page) {
3370 for (j = i - 1; j >= 0; j--)
3371 __free_pages(sg_page(&scatterlist[j]), order);
3372 kfree(sglist);
3373 return NULL;
3374 }
3375
3376 sg_set_page(&scatterlist[i], page,
3377 sg_size < bsize_elem ? sg_size : bsize_elem, 0);
3378 sg_size -= bsize_elem;
3379 }
3380
3381 return sglist;
3382}
3383
3384/**
3385 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3386 * @sglist: scatter/gather list pointer
3387 * @buffer: buffer pointer
3388 * @len: buffer length
3389 * @direction: data transfer direction
3390 *
3391 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3392 *
3393 * Return value:
3394 * 0 on success / other on failure
3395 */
3396static int pmcraid_copy_sglist(
3397 struct pmcraid_sglist *sglist,
3398 unsigned long buffer,
3399 u32 len,
3400 int direction
3401)
3402{
3403 struct scatterlist *scatterlist;
3404 void *kaddr;
3405 int bsize_elem;
3406 int i;
3407 int rc = 0;
3408
3409 /* Determine the actual number of bytes per element */
3410 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3411
3412 scatterlist = sglist->scatterlist;
3413
3414 for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3415 struct page *page = sg_page(&scatterlist[i]);
3416
3417 kaddr = kmap(page);
3418 if (direction == DMA_TO_DEVICE)
3419 rc = __copy_from_user(kaddr,
3420 (void *)buffer,
3421 bsize_elem);
3422 else
3423 rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
3424
3425 kunmap(page);
3426
3427 if (rc) {
3428 pmcraid_err("failed to copy user data into sg list\n");
3429 return -EFAULT;
3430 }
3431
3432 scatterlist[i].length = bsize_elem;
3433 }
3434
3435 if (len % bsize_elem) {
3436 struct page *page = sg_page(&scatterlist[i]);
3437
3438 kaddr = kmap(page);
3439
3440 if (direction == DMA_TO_DEVICE)
3441 rc = __copy_from_user(kaddr,
3442 (void *)buffer,
3443 len % bsize_elem);
3444 else
3445 rc = __copy_to_user((void *)buffer,
3446 kaddr,
3447 len % bsize_elem);
3448
3449 kunmap(page);
3450
3451 scatterlist[i].length = len % bsize_elem;
3452 }
3453
3454 if (rc) {
3455 pmcraid_err("failed to copy user data into sg list\n");
3456 rc = -EFAULT;
3457 }
3458
3459 return rc;
3460}
3461
3462/**
3463 * pmcraid_queuecommand - Queue a mid-layer request
3464 * @scsi_cmd: scsi command struct
3465 * @done: done function
3466 *
3467 * This function queues a request generated by the mid-layer. Midlayer calls
3468 * this routine within host->lock. Some of the functions called by queuecommand
3469 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3470 *
3471 * Return value:
3472 * 0 on success
3473 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3474 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3475 */
f281233d 3476static int pmcraid_queuecommand_lck(
89a36810
AR		 3477 struct scsi_cmnd *scsi_cmd,
3478 void (*done) (struct scsi_cmnd *)
3479)
3480{
3481 struct pmcraid_instance *pinstance;
3482 struct pmcraid_resource_entry *res;
3483 struct pmcraid_ioarcb *ioarcb;
3484 struct pmcraid_cmd *cmd;
c20c4267 3485 u32 fw_version;
89a36810
AR		 3486 int rc = 0;
3487
3488 pinstance =
3489 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
c20c4267 3490 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
89a36810
AR		 3491 scsi_cmd->scsi_done = done;
3492 res = scsi_cmd->device->hostdata;
3493 scsi_cmd->result = (DID_OK << 16);
3494
3495 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3496 * the command
3497 */
3498 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3499 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3500 scsi_cmd->result = (DID_NO_CONNECT << 16);
3501 scsi_cmd->scsi_done(scsi_cmd);
3502 return 0;
3503 }
3504
3505 /* If IOA reset is in progress, can't queue the commands */
3506 if (pinstance->ioa_reset_in_progress)
3507 return SCSI_MLQUEUE_HOST_BUSY;
3508
c20c4267
AR		 3509 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3510 * the command here itself with success return
3511 */
3512 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3513 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3514 scsi_cmd->scsi_done(scsi_cmd);
3515 return 0;
3516 }
3517
89a36810
AR		 3518 /* initialize the command and IOARCB to be sent to IOA */
3519 cmd = pmcraid_get_free_cmd(pinstance);
3520
3521 if (cmd == NULL) {
3522 pmcraid_err("free command block is not available\n");
3523 return SCSI_MLQUEUE_HOST_BUSY;
3524 }
3525
3526 cmd->scsi_cmd = scsi_cmd;
3527 ioarcb = &(cmd->ioa_cb->ioarcb);
3528 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3529 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3530 ioarcb->request_type = REQ_TYPE_SCSI;
3531
c20c4267
AR		 3532 /* set hrrq number where the IOA should respond to. Note that all cmds
3533 * generated internally uses hrrq_id 0, exception to this is the cmd
3534 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3535 * hrrq_id assigned here in queuecommand
3536 */
3537 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3538 pinstance->num_hrrq;
89a36810
AR		 3539 cmd->cmd_done = pmcraid_io_done;
3540
3541 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3542 if (scsi_cmd->underflow == 0)
3543 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3544
3545 if (res->sync_reqd) {
3546 ioarcb->request_flags0 |= SYNC_COMPLETE;
3547 res->sync_reqd = 0;
3548 }
3549
3550 ioarcb->request_flags0 |= NO_LINK_DESCS;
3551 ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
3552
3553 if (RES_IS_GSCSI(res->cfg_entry))
3554 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3555 }
3556
3557 rc = pmcraid_build_ioadl(pinstance, cmd);
3558
3559 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3560 le32_to_cpu(ioarcb->response_handle) >> 2,
3561 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3562 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3563 PMCRAID_PHYS_BUS_ID,
3564 RES_IS_VSET(res->cfg_entry) ?
c20c4267
AR		 3565 (fw_version <= PMCRAID_FW_VERSION_1 ?
3566 res->cfg_entry.unique_flags1 :
3567 res->cfg_entry.array_id & 0xFF) :
89a36810
AR		 3568 RES_TARGET(res->cfg_entry.resource_address),
3569 RES_LUN(res->cfg_entry.resource_address));
3570
3571 if (likely(rc == 0)) {
3572 _pmcraid_fire_command(cmd);
3573 } else {
3574 pmcraid_err("queuecommand could not build ioadl\n");
3575 pmcraid_return_cmd(cmd);
3576 rc = SCSI_MLQUEUE_HOST_BUSY;
3577 }
3578
3579 return rc;
3580}
3581
f281233d
JG		 3582static DEF_SCSI_QCMD(pmcraid_queuecommand)
3583
89a36810
AR		 3584/**
3585 * pmcraid_open -char node "open" entry, allowed only users with admin access
3586 */
3587static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3588{
3589 struct pmcraid_instance *pinstance;
3590
3591 if (!capable(CAP_SYS_ADMIN))
3592 return -EACCES;
3593
3594 /* Populate adapter instance * pointer for use by ioctl */
3595 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3596 filep->private_data = pinstance;
3597
3598 return 0;
3599}
3600
89a36810
AR		 3601/**
3602 * pmcraid_fasync - Async notifier registration from applications
3603 *
3604 * This function adds the calling process to a driver global queue. When an
3605 * event occurs, SIGIO will be sent to all processes in this queue.
3606 */
3607static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3608{
3609 struct pmcraid_instance *pinstance;
3610 int rc;
3611
660bdddb 3612 pinstance = filep->private_data;
89a36810
AR		 3613 mutex_lock(&pinstance->aen_queue_lock);
3614 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3615 mutex_unlock(&pinstance->aen_queue_lock);
3616
3617 return rc;
3618}
3619
3620
3621/**
3622 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3623 * commands sent over IOCTL interface
3624 *
3625 * @cmd : pointer to struct pmcraid_cmd
3626 * @buflen : length of the request buffer
3627 * @direction : data transfer direction
3628 *
3629 * Return value
af901ca1 3630 * 0 on success, non-zero error code on failure
89a36810
AR		 3631 */
3632static int pmcraid_build_passthrough_ioadls(
3633 struct pmcraid_cmd *cmd,
3634 int buflen,
3635 int direction
3636)
3637{
3638 struct pmcraid_sglist *sglist = NULL;
3639 struct scatterlist *sg = NULL;
3640 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3641 struct pmcraid_ioadl_desc *ioadl;
3642 int i;
3643
3644 sglist = pmcraid_alloc_sglist(buflen);
3645
3646 if (!sglist) {
3647 pmcraid_err("can't allocate memory for passthrough SGls\n");
3648 return -ENOMEM;
3649 }
3650
3651 sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
3652 sglist->scatterlist,
3653 sglist->num_sg, direction);
3654
3655 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3656 dev_err(&cmd->drv_inst->pdev->dev,
3657 "Failed to map passthrough buffer!\n");
3658 pmcraid_free_sglist(sglist);
3659 return -EIO;
3660 }
3661
3662 cmd->sglist = sglist;
3663 ioarcb->request_flags0 |= NO_LINK_DESCS;
3664
3665 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3666
3667 /* Initialize IOADL descriptor addresses */
3668 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3669 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3670 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3671 ioadl[i].flags = 0;
3672 }
3673
3674 /* setup the last descriptor */
88197966 3675 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 3676
3677 return 0;
3678}
3679
3680
3681/**
3682 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3683 *
3684 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3685 * @buflen: size of the request buffer
3686 * @direction: data transfer direction
3687 *
3688 * Return value
af901ca1 3689 * 0 on success, non-zero error code on failure
89a36810
AR		 3690 */
3691static void pmcraid_release_passthrough_ioadls(
3692 struct pmcraid_cmd *cmd,
3693 int buflen,
3694 int direction
3695)
3696{
3697 struct pmcraid_sglist *sglist = cmd->sglist;
3698
3699 if (buflen > 0) {
3700 pci_unmap_sg(cmd->drv_inst->pdev,
3701 sglist->scatterlist,
3702 sglist->num_sg,
3703 direction);
3704 pmcraid_free_sglist(sglist);
3705 cmd->sglist = NULL;
3706 }
3707}
3708
3709/**
3710 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3711 *
3712 * @pinstance: pointer to adapter instance structure
3713 * @cmd: ioctl code
3714 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3715 *
3716 * Return value
af901ca1 3717 * 0 on success, non-zero error code on failure
89a36810
AR		 3718 */
3719static long pmcraid_ioctl_passthrough(
3720 struct pmcraid_instance *pinstance,
3721 unsigned int ioctl_cmd,
3722 unsigned int buflen,
3723 unsigned long arg
3724)
3725{
3726 struct pmcraid_passthrough_ioctl_buffer *buffer;
3727 struct pmcraid_ioarcb *ioarcb;
3728 struct pmcraid_cmd *cmd;
3729 struct pmcraid_cmd *cancel_cmd;
3730 unsigned long request_buffer;
3731 unsigned long request_offset;
3732 unsigned long lock_flags;
592488a3 3733 void *ioasa;
c20c4267 3734 u32 ioasc;
89a36810
AR		 3735 int request_size;
3736 int buffer_size;
3737 u8 access, direction;
3738 int rc = 0;
3739
3740 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3741 if (pinstance->ioa_reset_in_progress) {
3742 rc = wait_event_interruptible_timeout(
3743 pinstance->reset_wait_q,
3744 !pinstance->ioa_reset_in_progress,
3745 msecs_to_jiffies(10000));
3746
3747 if (!rc)
3748 return -ETIMEDOUT;
3749 else if (rc < 0)
3750 return -ERESTARTSYS;
3751 }
3752
3753 /* If adapter is not in operational state, return error */
3754 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3755 pmcraid_err("IOA is not operational\n");
3756 return -ENOTTY;
3757 }
3758
3759 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3760 buffer = kmalloc(buffer_size, GFP_KERNEL);
3761
3762 if (!buffer) {
3763 pmcraid_err("no memory for passthrough buffer\n");
3764 return -ENOMEM;
3765 }
3766
3767 request_offset =
3768 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3769
3770 request_buffer = arg + request_offset;
3771
3772 rc = __copy_from_user(buffer,
3773 (struct pmcraid_passthrough_ioctl_buffer *) arg,
3774 sizeof(struct pmcraid_passthrough_ioctl_buffer));
592488a3
AR		 3775
3776 ioasa =
3777 (void *)(arg +
3778 offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
3779
89a36810
AR		 3780 if (rc) {
3781 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3782 rc = -EFAULT;
3783 goto out_free_buffer;
3784 }
3785
3786 request_size = buffer->ioarcb.data_transfer_length;
3787
3788 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3789 access = VERIFY_READ;
3790 direction = DMA_TO_DEVICE;
3791 } else {
3792 access = VERIFY_WRITE;
3793 direction = DMA_FROM_DEVICE;
3794 }
3795
3796 if (request_size > 0) {
3797 rc = access_ok(access, arg, request_offset + request_size);
3798
3799 if (!rc) {
3800 rc = -EFAULT;
3801 goto out_free_buffer;
3802 }
5f6279da
DR		 3803 } else if (request_size < 0) {
3804 rc = -EINVAL;
3805 goto out_free_buffer;
89a36810
AR		 3806 }
3807
3808 /* check if we have any additional command parameters */
3809 if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
3810 rc = -EINVAL;
3811 goto out_free_buffer;
3812 }
3813
3814 cmd = pmcraid_get_free_cmd(pinstance);
3815
3816 if (!cmd) {
3817 pmcraid_err("free command block is not available\n");
3818 rc = -ENOMEM;
3819 goto out_free_buffer;
3820 }
3821
3822 cmd->scsi_cmd = NULL;
3823 ioarcb = &(cmd->ioa_cb->ioarcb);
3824
3825 /* Copy the user-provided IOARCB stuff field by field */
3826 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3827 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3828 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3829 ioarcb->request_type = buffer->ioarcb.request_type;
3830 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3831 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3832 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3833
3834 if (buffer->ioarcb.add_cmd_param_length) {
3835 ioarcb->add_cmd_param_length =
3836 buffer->ioarcb.add_cmd_param_length;
3837 ioarcb->add_cmd_param_offset =
3838 buffer->ioarcb.add_cmd_param_offset;
3839 memcpy(ioarcb->add_data.u.add_cmd_params,
3840 buffer->ioarcb.add_data.u.add_cmd_params,
3841 buffer->ioarcb.add_cmd_param_length);
3842 }
3843
c20c4267
AR		 3844 /* set hrrq number where the IOA should respond to. Note that all cmds
3845 * generated internally uses hrrq_id 0, exception to this is the cmd
3846 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3847 * hrrq_id assigned here in queuecommand
3848 */
3849 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3850 pinstance->num_hrrq;
3851
89a36810
AR		 3852 if (request_size) {
3853 rc = pmcraid_build_passthrough_ioadls(cmd,
3854 request_size,
3855 direction);
3856 if (rc) {
3857 pmcraid_err("couldn't build passthrough ioadls\n");
3858 goto out_free_buffer;
3859 }
b5b51544
DR		 3860 } else if (request_size < 0) {
3861 rc = -EINVAL;
3862 goto out_free_buffer;
89a36810
AR		 3863 }
3864
3865 /* If data is being written into the device, copy the data from user
3866 * buffers
3867 */
3868 if (direction == DMA_TO_DEVICE && request_size > 0) {
3869 rc = pmcraid_copy_sglist(cmd->sglist,
3870 request_buffer,
3871 request_size,
3872 direction);
3873 if (rc) {
3874 pmcraid_err("failed to copy user buffer\n");
3875 goto out_free_sglist;
3876 }
3877 }
3878
3879 /* passthrough ioctl is a blocking command so, put the user to sleep
3880 * until timeout. Note that a timeout value of 0 means, do timeout.
3881 */
3882 cmd->cmd_done = pmcraid_internal_done;
3883 init_completion(&cmd->wait_for_completion);
3884 cmd->completion_req = 1;
3885
3886 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3887 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3888 cmd->ioa_cb->ioarcb.cdb[0],
3889 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3890
3891 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3892 _pmcraid_fire_command(cmd);
3893 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3894
c20c4267
AR		 3895 /* NOTE ! Remove the below line once abort_task is implemented
3896 * in firmware. This line disables ioctl command timeout handling logic
3897 * similar to IO command timeout handling, making ioctl commands to wait
3898 * until the command completion regardless of timeout value specified in
3899 * ioarcb
3900 */
3901 buffer->ioarcb.cmd_timeout = 0;
3902
89a36810
AR		 3903 /* If command timeout is specified put caller to wait till that time,
3904 * otherwise it would be blocking wait. If command gets timed out, it
3905 * will be aborted.
3906 */
3907 if (buffer->ioarcb.cmd_timeout == 0) {
3908 wait_for_completion(&cmd->wait_for_completion);
3909 } else if (!wait_for_completion_timeout(
3910 &cmd->wait_for_completion,
3911 msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
3912
3913 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3914 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
3915 cmd->ioa_cb->ioarcb.cdb[0]);
3916
89a36810
AR		 3917 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3918 cancel_cmd = pmcraid_abort_cmd(cmd);
3919 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3920
3921 if (cancel_cmd) {
3922 wait_for_completion(&cancel_cmd->wait_for_completion);
c20c4267 3923 ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
89a36810 3924 pmcraid_return_cmd(cancel_cmd);
c20c4267
AR		 3925
3926 /* if abort task couldn't find the command i.e it got
3927 * completed prior to aborting, return good completion.
25985edc 3928 * if command got aborted successfully or there was IOA
c20c4267
AR		 3929 * reset due to abort task itself getting timedout then
3930 * return -ETIMEDOUT
3931 */
3932 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3933 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3934 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3935 rc = -ETIMEDOUT;
3936 goto out_handle_response;
3937 }
89a36810
AR		 3938 }
3939
c20c4267
AR		 3940 /* no command block for abort task or abort task failed to abort
3941 * the IOARCB, then wait for 150 more seconds and initiate reset
3942 * sequence after timeout
3943 */
3944 if (!wait_for_completion_timeout(
3945 &cmd->wait_for_completion,
3946 msecs_to_jiffies(150 * 1000))) {
3947 pmcraid_reset_bringup(cmd->drv_inst);
3948 rc = -ETIMEDOUT;
3949 }
89a36810
AR		 3950 }
3951
c20c4267 3952out_handle_response:
592488a3
AR		 3953 /* copy entire IOASA buffer and return IOCTL success.
3954 * If copying IOASA to user-buffer fails, return
89a36810
AR		 3955 * EFAULT
3956 */
592488a3
AR		 3957 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3958 sizeof(struct pmcraid_ioasa))) {
3959 pmcraid_err("failed to copy ioasa buffer to user\n");
3960 rc = -EFAULT;
89a36810 3961 }
c20c4267 3962
89a36810
AR		 3963 /* If the data transfer was from device, copy the data onto user
3964 * buffers
3965 */
3966 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3967 rc = pmcraid_copy_sglist(cmd->sglist,
3968 request_buffer,
3969 request_size,
3970 direction);
3971 if (rc) {
3972 pmcraid_err("failed to copy user buffer\n");
3973 rc = -EFAULT;
3974 }
3975 }
3976
3977out_free_sglist:
3978 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3979 pmcraid_return_cmd(cmd);
3980
3981out_free_buffer:
3982 kfree(buffer);
3983
3984 return rc;
3985}
3986
3987
3988
3989
3990/**
3991 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3992 *
3993 * @pinstance: pointer to adapter instance structure
3994 * @cmd: ioctl command passed in
3995 * @buflen: length of user_buffer
3996 * @user_buffer: user buffer pointer
3997 *
3998 * Return Value
3999 * 0 in case of success, otherwise appropriate error code
4000 */
4001static long pmcraid_ioctl_driver(
4002 struct pmcraid_instance *pinstance,
4003 unsigned int cmd,
4004 unsigned int buflen,
4005 void __user *user_buffer
4006)
4007{
4008 int rc = -ENOSYS;
4009
4010 if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
c20c4267 4011 pmcraid_err("ioctl_driver: access fault in request buffer\n");
89a36810
AR		 4012 return -EFAULT;
4013 }
4014
4015 switch (cmd) {
4016 case PMCRAID_IOCTL_RESET_ADAPTER:
4017 pmcraid_reset_bringup(pinstance);
4018 rc = 0;
4019 break;
4020
4021 default:
4022 break;
4023 }
4024
4025 return rc;
4026}
4027
4028/**
4029 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4030 *
4031 * @cmd: ioctl command
4032 * @arg: user buffer
4033 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4034 *
4035 * Return Value
4036 * negetive error code if there are access issues, otherwise zero.
4037 * Upon success, returns ioctl header copied out of user buffer.
4038 */
4039
4040static int pmcraid_check_ioctl_buffer(
4041 int cmd,
4042 void __user *arg,
4043 struct pmcraid_ioctl_header *hdr
4044)
4045{
4046 int rc = 0;
4047 int access = VERIFY_READ;
4048
4049 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
4050 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4051 return -EFAULT;
4052 }
4053
4054 /* check for valid driver signature */
4055 rc = memcmp(hdr->signature,
4056 PMCRAID_IOCTL_SIGNATURE,
4057 sizeof(hdr->signature));
4058 if (rc) {
4059 pmcraid_err("signature verification failed\n");
4060 return -EINVAL;
4061 }
4062
89a36810
AR		 4063 /* check for appropriate buffer access */
4064 if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
4065 access = VERIFY_WRITE;
4066
4067 rc = access_ok(access,
4068 (arg + sizeof(struct pmcraid_ioctl_header)),
4069 hdr->buffer_length);
4070 if (!rc) {
4071 pmcraid_err("access failed for user buffer of size %d\n",
4072 hdr->buffer_length);
4073 return -EFAULT;
4074 }
4075
4076 return 0;
4077}
4078
4079/**
4080 * pmcraid_ioctl - char node ioctl entry point
4081 */
4082static long pmcraid_chr_ioctl(
4083 struct file *filep,
4084 unsigned int cmd,
4085 unsigned long arg
4086)
4087{
4088 struct pmcraid_instance *pinstance = NULL;
4089 struct pmcraid_ioctl_header *hdr = NULL;
4090 int retval = -ENOTTY;
4091
a63ec376 4092 hdr = kmalloc(sizeof(struct pmcraid_ioctl_header), GFP_KERNEL);
89a36810
AR		 4093
4094 if (!hdr) {
4f91b114 4095 pmcraid_err("failed to allocate memory for ioctl header\n");
89a36810
AR		 4096 return -ENOMEM;
4097 }
4098
4099 retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
4100
4101 if (retval) {
4102 pmcraid_info("chr_ioctl: header check failed\n");
4103 kfree(hdr);
4104 return retval;
4105 }
4106
660bdddb 4107 pinstance = filep->private_data;
89a36810
AR		 4108
4109 if (!pinstance) {
4110 pmcraid_info("adapter instance is not found\n");
4111 kfree(hdr);
4112 return -ENOTTY;
4113 }
4114
4115 switch (_IOC_TYPE(cmd)) {
4116
4117 case PMCRAID_PASSTHROUGH_IOCTL:
4118 /* If ioctl code is to download microcode, we need to block
4119 * mid-layer requests.
4120 */
4121 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4122 scsi_block_requests(pinstance->host);
4123
4124 retval = pmcraid_ioctl_passthrough(pinstance,
4125 cmd,
4126 hdr->buffer_length,
4127 arg);
4128
4129 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4130 scsi_unblock_requests(pinstance->host);
4131 break;
4132
4133 case PMCRAID_DRIVER_IOCTL:
4134 arg += sizeof(struct pmcraid_ioctl_header);
4135 retval = pmcraid_ioctl_driver(pinstance,
4136 cmd,
4137 hdr->buffer_length,
4138 (void __user *)arg);
4139 break;
4140
4141 default:
4142 retval = -ENOTTY;
4143 break;
4144 }
4145
4146 kfree(hdr);
4147
4148 return retval;
4149}
4150
4151/**
4152 * File operations structure for management interface
4153 */
4154static const struct file_operations pmcraid_fops = {
4155 .owner = THIS_MODULE,
4156 .open = pmcraid_chr_open,
89a36810
AR		 4157 .fasync = pmcraid_chr_fasync,
4158 .unlocked_ioctl = pmcraid_chr_ioctl,
4159#ifdef CONFIG_COMPAT
4160 .compat_ioctl = pmcraid_chr_ioctl,
4161#endif
6038f373 4162 .llseek = noop_llseek,
89a36810
AR		 4163};
4164
4165
4166
4167
4168/**
4169 * pmcraid_show_log_level - Display adapter's error logging level
4170 * @dev: class device struct
4171 * @buf: buffer
4172 *
4173 * Return value:
4174 * number of bytes printed to buffer
4175 */
4176static ssize_t pmcraid_show_log_level(
4177 struct device *dev,
4178 struct device_attribute *attr,
4179 char *buf)
4180{
4181 struct Scsi_Host *shost = class_to_shost(dev);
4182 struct pmcraid_instance *pinstance =
4183 (struct pmcraid_instance *)shost->hostdata;
4184 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
4185}
4186
4187/**
4188 * pmcraid_store_log_level - Change the adapter's error logging level
4189 * @dev: class device struct
4190 * @buf: buffer
4191 * @count: not used
4192 *
4193 * Return value:
4194 * number of bytes printed to buffer
4195 */
4196static ssize_t pmcraid_store_log_level(
4197 struct device *dev,
4198 struct device_attribute *attr,
4199 const char *buf,
4200 size_t count
4201)
4202{
4203 struct Scsi_Host *shost;
4204 struct pmcraid_instance *pinstance;
4205 unsigned long val;
4206
4207 if (strict_strtoul(buf, 10, &val))
4208 return -EINVAL;
4209 /* log-level should be from 0 to 2 */
4210 if (val > 2)
4211 return -EINVAL;
4212
4213 shost = class_to_shost(dev);
4214 pinstance = (struct pmcraid_instance *)shost->hostdata;
4215 pinstance->current_log_level = val;
4216
4217 return strlen(buf);
4218}
4219
4220static struct device_attribute pmcraid_log_level_attr = {
4221 .attr = {
4222 .name = "log_level",
4223 .mode = S_IRUGO | S_IWUSR,
4224 },
4225 .show = pmcraid_show_log_level,
4226 .store = pmcraid_store_log_level,
4227};
4228
4229/**
4230 * pmcraid_show_drv_version - Display driver version
4231 * @dev: class device struct
4232 * @buf: buffer
4233 *
4234 * Return value:
4235 * number of bytes printed to buffer
4236 */
4237static ssize_t pmcraid_show_drv_version(
4238 struct device *dev,
4239 struct device_attribute *attr,
4240 char *buf
4241)
4242{
a1b66665
MM		 4243 return snprintf(buf, PAGE_SIZE, "version: %s\n",
4244 PMCRAID_DRIVER_VERSION);
89a36810
AR		 4245}
4246
4247static struct device_attribute pmcraid_driver_version_attr = {
4248 .attr = {
4249 .name = "drv_version",
4250 .mode = S_IRUGO,
4251 },
4252 .show = pmcraid_show_drv_version,
4253};
4254
4255/**
4256 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4257 * @dev: class device struct
4258 * @buf: buffer
4259 *
4260 * Return value:
4261 * number of bytes printed to buffer
4262 */
4263static ssize_t pmcraid_show_adapter_id(
4264 struct device *dev,
4265 struct device_attribute *attr,
4266 char *buf
4267)
4268{
4269 struct Scsi_Host *shost = class_to_shost(dev);
4270 struct pmcraid_instance *pinstance =
4271 (struct pmcraid_instance *)shost->hostdata;
4272 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4273 pinstance->pdev->devfn;
4274 u32 aen_group = pmcraid_event_family.id;
4275
4276 return snprintf(buf, PAGE_SIZE,
4277 "adapter id: %d\nminor: %d\naen group: %d\n",
4278 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4279}
4280
4281static struct device_attribute pmcraid_adapter_id_attr = {
4282 .attr = {
4283 .name = "adapter_id",
4284 .mode = S_IRUGO | S_IWUSR,
4285 },
4286 .show = pmcraid_show_adapter_id,
4287};
4288
4289static struct device_attribute *pmcraid_host_attrs[] = {
4290 &pmcraid_log_level_attr,
4291 &pmcraid_driver_version_attr,
4292 &pmcraid_adapter_id_attr,
4293 NULL,
4294};
4295
4296
4297/* host template structure for pmcraid driver */
4298static struct scsi_host_template pmcraid_host_template = {
4299 .module = THIS_MODULE,
4300 .name = PMCRAID_DRIVER_NAME,
4301 .queuecommand = pmcraid_queuecommand,
4302 .eh_abort_handler = pmcraid_eh_abort_handler,
4303 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4304 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4305 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4306 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4307
4308 .slave_alloc = pmcraid_slave_alloc,
4309 .slave_configure = pmcraid_slave_configure,
4310 .slave_destroy = pmcraid_slave_destroy,
4311 .change_queue_depth = pmcraid_change_queue_depth,
4312 .change_queue_type = pmcraid_change_queue_type,
4313 .can_queue = PMCRAID_MAX_IO_CMD,
4314 .this_id = -1,
4315 .sg_tablesize = PMCRAID_MAX_IOADLS,
4316 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
8562d028 4317 .no_write_same = 1,
89a36810
AR		 4318 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4319 .use_clustering = ENABLE_CLUSTERING,
4320 .shost_attrs = pmcraid_host_attrs,
4321 .proc_name = PMCRAID_DRIVER_NAME
4322};
4323
c20c4267
AR		 4324/*
4325 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4326 * @irq: interrupt vector number
4327 * @dev_id: pointer hrrq_vector
89a36810
AR		 4328 *
4329 * Return Value
c20c4267 4330 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
89a36810 4331 */
c20c4267
AR		 4332
4333static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
89a36810 4334{
c20c4267
AR		 4335 struct pmcraid_isr_param *hrrq_vector;
4336 struct pmcraid_instance *pinstance;
4337 unsigned long lock_flags;
4338 u32 intrs_val;
4339 int hrrq_id;
4340
4341 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4342 hrrq_id = hrrq_vector->hrrq_id;
4343 pinstance = hrrq_vector->drv_inst;
4344
4345 if (!hrrq_id) {
4346 /* Read the interrupt */
4347 intrs_val = pmcraid_read_interrupts(pinstance);
4348 if (intrs_val &&
4349 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4350 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4351 /* Any error interrupts including unit_check,
4352 * initiate IOA reset.In case of unit check indicate
4353 * to reset_sequence that IOA unit checked and prepare
4354 * for a dump during reset sequence
4355 */
4356 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4357 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4358 pinstance->ioa_unit_check = 1;
4359
4360 pmcraid_err("ISR: error interrupts: %x \
4361 initiating reset\n", intrs_val);
4362 spin_lock_irqsave(pinstance->host->host_lock,
4363 lock_flags);
4364 pmcraid_initiate_reset(pinstance);
4365 spin_unlock_irqrestore(
4366 pinstance->host->host_lock,
4367 lock_flags);
4368 }
4369 /* If interrupt was as part of the ioa initialization,
4370 * clear it. Delete the timer and wakeup the
4371 * reset engine to proceed with reset sequence
4372 */
4373 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4374 pmcraid_clr_trans_op(pinstance);
4375
4376 /* Clear the interrupt register by writing
4377 * to host to ioa doorbell. Once done
4378 * FW will clear the interrupt.
4379 */
4380 iowrite32(DOORBELL_INTR_MSIX_CLR,
4381 pinstance->int_regs.host_ioa_interrupt_reg);
4382 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4383
89a36810 4384
c20c4267
AR		 4385 }
4386 }
4387
4388 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4389
4390 return IRQ_HANDLED;
89a36810
AR		 4391}
4392
4393/**
c20c4267 4394 * pmcraid_isr - implements legacy interrupt handling routine
89a36810
AR		 4395 *
4396 * @irq: interrupt vector number
4397 * @dev_id: pointer hrrq_vector
4398 *
4399 * Return Value
4400 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4401 */
4402static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4403{
4404 struct pmcraid_isr_param *hrrq_vector;
4405 struct pmcraid_instance *pinstance;
89a36810 4406 u32 intrs;
c20c4267
AR		 4407 unsigned long lock_flags;
4408 int hrrq_id = 0;
89a36810
AR		 4409
4410 /* In case of legacy interrupt mode where interrupts are shared across
4411 * isrs, it may be possible that the current interrupt is not from IOA
4412 */
4413 if (!dev_id) {
4414 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4415 return IRQ_NONE;
4416 }
89a36810
AR		 4417 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4418 pinstance = hrrq_vector->drv_inst;
4419
89a36810
AR		 4420 intrs = pmcraid_read_interrupts(pinstance);
4421
c20c4267 4422 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
89a36810 4423 return IRQ_NONE;
89a36810
AR		 4424
4425 /* Any error interrupts including unit_check, initiate IOA reset.
4426 * In case of unit check indicate to reset_sequence that IOA unit
4427 * checked and prepare for a dump during reset sequence
4428 */
4429 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4430
4431 if (intrs & INTRS_IOA_UNIT_CHECK)
4432 pinstance->ioa_unit_check = 1;
4433
4434 iowrite32(intrs,
4435 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4436 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4437 intrs);
c20c4267
AR		 4438 intrs = ioread32(
4439 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4440 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
89a36810 4441 pmcraid_initiate_reset(pinstance);
c20c4267 4442 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
89a36810 4443 } else {
c20c4267
AR		 4444 /* If interrupt was as part of the ioa initialization,
4445 * clear. Delete the timer and wakeup the
4446 * reset engine to proceed with reset sequence
4447 */
4448 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4449 pmcraid_clr_trans_op(pinstance);
4450 } else {
4451 iowrite32(intrs,
4452 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4453 ioread32(
4454 pinstance->int_regs.ioa_host_interrupt_clr_reg);
89a36810 4455
c20c4267
AR		 4456 tasklet_schedule(
4457 &(pinstance->isr_tasklet[hrrq_id]));
4458 }
4459 }
89a36810
AR		 4460
4461 return IRQ_HANDLED;
4462}
4463
4464
4465/**
4466 * pmcraid_worker_function - worker thread function
4467 *
4468 * @workp: pointer to struct work queue
4469 *
4470 * Return Value
4471 * None
4472 */
4473
4474static void pmcraid_worker_function(struct work_struct *workp)
4475{
4476 struct pmcraid_instance *pinstance;
4477 struct pmcraid_resource_entry *res;
4478 struct pmcraid_resource_entry *temp;
4479 struct scsi_device *sdev;
4480 unsigned long lock_flags;
4481 unsigned long host_lock_flags;
c20c4267 4482 u16 fw_version;
89a36810
AR		 4483 u8 bus, target, lun;
4484
4485 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4486 /* add resources only after host is added into system */
4487 if (!atomic_read(&pinstance->expose_resources))
4488 return;
4489
c20c4267
AR		 4490 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4491
89a36810
AR		 4492 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4493 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4494
4495 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4496 sdev = res->scsi_dev;
4497
4498 /* host_lock must be held before calling
4499 * scsi_device_get
4500 */
4501 spin_lock_irqsave(pinstance->host->host_lock,
4502 host_lock_flags);
4503 if (!scsi_device_get(sdev)) {
4504 spin_unlock_irqrestore(
4505 pinstance->host->host_lock,
4506 host_lock_flags);
4507 pmcraid_info("deleting %x from midlayer\n",
4508 res->cfg_entry.resource_address);
4509 list_move_tail(&res->queue,
4510 &pinstance->free_res_q);
4511 spin_unlock_irqrestore(
4512 &pinstance->resource_lock,
4513 lock_flags);
4514 scsi_remove_device(sdev);
4515 scsi_device_put(sdev);
4516 spin_lock_irqsave(&pinstance->resource_lock,
4517 lock_flags);
4518 res->change_detected = 0;
4519 } else {
4520 spin_unlock_irqrestore(
4521 pinstance->host->host_lock,
4522 host_lock_flags);
4523 }
4524 }
4525 }
4526
4527 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4528
4529 if (res->change_detected == RES_CHANGE_ADD) {
4530
c20c4267
AR		 4531 if (!pmcraid_expose_resource(fw_version,
4532 &res->cfg_entry))
89a36810
AR		 4533 continue;
4534
4535 if (RES_IS_VSET(res->cfg_entry)) {
4536 bus = PMCRAID_VSET_BUS_ID;
c20c4267
AR		 4537 if (fw_version <= PMCRAID_FW_VERSION_1)
4538 target = res->cfg_entry.unique_flags1;
4539 else
4540 target = res->cfg_entry.array_id & 0xFF;
89a36810
AR		 4541 lun = PMCRAID_VSET_LUN_ID;
4542 } else {
4543 bus = PMCRAID_PHYS_BUS_ID;
4544 target =
4545 RES_TARGET(
4546 res->cfg_entry.resource_address);
4547 lun = RES_LUN(res->cfg_entry.resource_address);
4548 }
4549
4550 res->change_detected = 0;
4551 spin_unlock_irqrestore(&pinstance->resource_lock,
4552 lock_flags);
4553 scsi_add_device(pinstance->host, bus, target, lun);
4554 spin_lock_irqsave(&pinstance->resource_lock,
4555 lock_flags);
4556 }
4557 }
4558
4559 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4560}
4561
4562/**
4563 * pmcraid_tasklet_function - Tasklet function
4564 *
4565 * @instance: pointer to msix param structure
4566 *
4567 * Return Value
4568 * None
4569 */
c20c4267 4570static void pmcraid_tasklet_function(unsigned long instance)
89a36810
AR		 4571{
4572 struct pmcraid_isr_param *hrrq_vector;
4573 struct pmcraid_instance *pinstance;
4574 unsigned long hrrq_lock_flags;
4575 unsigned long pending_lock_flags;
4576 unsigned long host_lock_flags;
4577 spinlock_t *lockp; /* hrrq buffer lock */
4578 int id;
89a36810
AR		 4579 __le32 resp;
4580
4581 hrrq_vector = (struct pmcraid_isr_param *)instance;
4582 pinstance = hrrq_vector->drv_inst;
4583 id = hrrq_vector->hrrq_id;
4584 lockp = &(pinstance->hrrq_lock[id]);
89a36810
AR		 4585
4586 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4587 * protected by its own lock. Traversals must be done within this lock
4588 * as there may be multiple tasklets running on multiple CPUs. Note
4589 * that the lock is held just for picking up the response handle and
4590 * manipulating hrrq_curr/toggle_bit values.
4591 */
4592 spin_lock_irqsave(lockp, hrrq_lock_flags);
4593
4594 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4595
4596 while ((resp & HRRQ_TOGGLE_BIT) ==
4597 pinstance->host_toggle_bit[id]) {
4598
4599 int cmd_index = resp >> 2;
4600 struct pmcraid_cmd *cmd = NULL;
4601
89a36810
AR		 4602 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4603 pinstance->hrrq_curr[id]++;
4604 } else {
4605 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4606 pinstance->host_toggle_bit[id] ^= 1u;
4607 }
4608
c20c4267
AR		 4609 if (cmd_index >= PMCRAID_MAX_CMD) {
4610 /* In case of invalid response handle, log message */
4611 pmcraid_err("Invalid response handle %d\n", cmd_index);
4612 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4613 continue;
4614 }
4615
4616 cmd = pinstance->cmd_list[cmd_index];
89a36810
AR		 4617 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4618
4619 spin_lock_irqsave(&pinstance->pending_pool_lock,
4620 pending_lock_flags);
4621 list_del(&cmd->free_list);
4622 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4623 pending_lock_flags);
4624 del_timer(&cmd->timer);
4625 atomic_dec(&pinstance->outstanding_cmds);
4626
4627 if (cmd->cmd_done == pmcraid_ioa_reset) {
4628 spin_lock_irqsave(pinstance->host->host_lock,
4629 host_lock_flags);
4630 cmd->cmd_done(cmd);
4631 spin_unlock_irqrestore(pinstance->host->host_lock,
4632 host_lock_flags);
4633 } else if (cmd->cmd_done != NULL) {
4634 cmd->cmd_done(cmd);
4635 }
4636 /* loop over until we are done with all responses */
4637 spin_lock_irqsave(lockp, hrrq_lock_flags);
4638 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4639 }
4640
4641 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4642}
4643
4644/**
4645 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4646 * @pinstance: pointer to adapter instance structure
4647 *
4648 * This routine un-registers registered interrupt handler and
4649 * also frees irqs/vectors.
4650 *
4651 * Retun Value
4652 * None
4653 */
4654static
4655void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4656{
c20c4267
AR		 4657 int i;
4658
4659 for (i = 0; i < pinstance->num_hrrq; i++)
4660 free_irq(pinstance->hrrq_vector[i].vector,
4661 &(pinstance->hrrq_vector[i]));
4662
4663 if (pinstance->interrupt_mode) {
4664 pci_disable_msix(pinstance->pdev);
4665 pinstance->interrupt_mode = 0;
4666 }
89a36810
AR		 4667}
4668
4669/**
4670 * pmcraid_register_interrupt_handler - registers interrupt handler
4671 * @pinstance: pointer to per-adapter instance structure
4672 *
4673 * Return Value
4674 * 0 on success, non-zero error code otherwise.
4675 */
4676static int
4677pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4678{
c20c4267 4679 int rc;
89a36810
AR		 4680 struct pci_dev *pdev = pinstance->pdev;
4681
5da61410
AR		 4682 if ((pmcraid_enable_msix) &&
4683 (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
c20c4267
AR		 4684 int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
4685 struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
4686 int i;
4687 for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
4688 entries[i].entry = i;
4689
4690 rc = pci_enable_msix(pdev, entries, num_hrrq);
4691 if (rc < 0)
4692 goto pmcraid_isr_legacy;
4693
4694 /* Check how many MSIX vectors are allocated and register
4695 * msi-x handlers for each of them giving appropriate buffer
4696 */
4697 if (rc > 0) {
4698 num_hrrq = rc;
4699 if (pci_enable_msix(pdev, entries, num_hrrq))
4700 goto pmcraid_isr_legacy;
4701 }
4702
4703 for (i = 0; i < num_hrrq; i++) {
4704 pinstance->hrrq_vector[i].hrrq_id = i;
4705 pinstance->hrrq_vector[i].drv_inst = pinstance;
4706 pinstance->hrrq_vector[i].vector = entries[i].vector;
4707 rc = request_irq(pinstance->hrrq_vector[i].vector,
4708 pmcraid_isr_msix, 0,
4709 PMCRAID_DRIVER_NAME,
4710 &(pinstance->hrrq_vector[i]));
4711
4712 if (rc) {
4713 int j;
4714 for (j = 0; j < i; j++)
4715 free_irq(entries[j].vector,
4716 &(pinstance->hrrq_vector[j]));
4717 pci_disable_msix(pdev);
4718 goto pmcraid_isr_legacy;
4719 }
4720 }
4721
4722 pinstance->num_hrrq = num_hrrq;
4723 pinstance->interrupt_mode = 1;
4724 iowrite32(DOORBELL_INTR_MODE_MSIX,
4725 pinstance->int_regs.host_ioa_interrupt_reg);
4726 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4727 goto pmcraid_isr_out;
4728 }
4729
4730pmcraid_isr_legacy:
4731 /* If MSI-X registration failed fallback to legacy mode, where
4732 * only one hrrq entry will be used
4733 */
89a36810
AR		 4734 pinstance->hrrq_vector[0].hrrq_id = 0;
4735 pinstance->hrrq_vector[0].drv_inst = pinstance;
c20c4267 4736 pinstance->hrrq_vector[0].vector = pdev->irq;
89a36810 4737 pinstance->num_hrrq = 1;
c20c4267
AR		 4738 rc = 0;
4739
4740 rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
4741 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
4742pmcraid_isr_out:
4743 return rc;
89a36810
AR		 4744}
4745
4746/**
4747 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4748 * @pinstance: per adapter instance structure pointer
4749 * @max_index: number of buffer blocks to release
4750 *
4751 * Return Value
4752 * None
4753 */
4754static void
4755pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4756{
4757 int i;
4758 for (i = 0; i < max_index; i++) {
4759 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4760 pinstance->cmd_list[i] = NULL;
4761 }
4762 kmem_cache_destroy(pinstance->cmd_cachep);
4763 pinstance->cmd_cachep = NULL;
4764}
4765
4766/**
4767 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4768 * @pinstance: pointer to per adapter instance structure
4769 * @max_index: number of buffers (from 0 onwards) to release
4770 *
4771 * This function assumes that the command blocks for which control blocks are
4772 * linked are not released.
4773 *
4774 * Return Value
4775 * None
4776 */
4777static void
4778pmcraid_release_control_blocks(
4779 struct pmcraid_instance *pinstance,
4780 int max_index
4781)
4782{
4783 int i;
4784
4785 if (pinstance->control_pool == NULL)
4786 return;
4787
4788 for (i = 0; i < max_index; i++) {
4789 pci_pool_free(pinstance->control_pool,
4790 pinstance->cmd_list[i]->ioa_cb,
4791 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4792 pinstance->cmd_list[i]->ioa_cb = NULL;
4793 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4794 }
4795 pci_pool_destroy(pinstance->control_pool);
4796 pinstance->control_pool = NULL;
4797}
4798
4799/**
4800 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4801 * @pinstance - pointer to per adapter instance structure
4802 *
4803 * Allocates memory for command blocks using kernel slab allocator.
4804 *
4805 * Return Value
4806 * 0 in case of success; -ENOMEM in case of failure
4807 */
6f039790 4808static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
89a36810
AR		 4809{
4810 int i;
4811
4812 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4813 pinstance->host->unique_id);
4814
4815
4816 pinstance->cmd_cachep = kmem_cache_create(
4817 pinstance->cmd_pool_name,
4818 sizeof(struct pmcraid_cmd), 0,
4819 SLAB_HWCACHE_ALIGN, NULL);
4820 if (!pinstance->cmd_cachep)
4821 return -ENOMEM;
4822
4823 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4824 pinstance->cmd_list[i] =
4825 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4826 if (!pinstance->cmd_list[i]) {
4827 pmcraid_release_cmd_blocks(pinstance, i);
4828 return -ENOMEM;
4829 }
4830 }
4831 return 0;
4832}
4833
4834/**
4835 * pmcraid_allocate_control_blocks - allocates memory control blocks
4836 * @pinstance : pointer to per adapter instance structure
4837 *
4838 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4839 * and IOASAs. This is called after command blocks are already allocated.
4840 *
4841 * Return Value
4842 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4843 */
6f039790 4844static int pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
89a36810
AR		 4845{
4846 int i;
4847
4848 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4849 pinstance->host->unique_id);
4850
4851 pinstance->control_pool =
4852 pci_pool_create(pinstance->ctl_pool_name,
4853 pinstance->pdev,
4854 sizeof(struct pmcraid_control_block),
4855 PMCRAID_IOARCB_ALIGNMENT, 0);
4856
4857 if (!pinstance->control_pool)
4858 return -ENOMEM;
4859
4860 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4861 pinstance->cmd_list[i]->ioa_cb =
4862 pci_pool_alloc(
4863 pinstance->control_pool,
4864 GFP_KERNEL,
4865 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4866
4867 if (!pinstance->cmd_list[i]->ioa_cb) {
4868 pmcraid_release_control_blocks(pinstance, i);
4869 return -ENOMEM;
4870 }
4871 memset(pinstance->cmd_list[i]->ioa_cb, 0,
4872 sizeof(struct pmcraid_control_block));
4873 }
4874 return 0;
4875}
4876
4877/**
4878 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4879 * @pinstance: pointer to per adapter instance structure
4880 * @maxindex: size of hrrq buffer pointer array
4881 *
4882 * Return Value
4883 * None
4884 */
4885static void
4886pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4887{
4888 int i;
4889 for (i = 0; i < maxindex; i++) {
4890
4891 pci_free_consistent(pinstance->pdev,
4892 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4893 pinstance->hrrq_start[i],
4894 pinstance->hrrq_start_bus_addr[i]);
4895
4896 /* reset pointers and toggle bit to zeros */
4897 pinstance->hrrq_start[i] = NULL;
4898 pinstance->hrrq_start_bus_addr[i] = 0;
4899 pinstance->host_toggle_bit[i] = 0;
4900 }
4901}
4902
4903/**
4904 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4905 * @pinstance: pointer to per adapter instance structure
4906 *
4907 * Return value
4908 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4909 */
6f039790 4910static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
89a36810 4911{
c20c4267 4912 int i, buffer_size;
89a36810 4913
c20c4267 4914 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
89a36810 4915
c20c4267 4916 for (i = 0; i < pinstance->num_hrrq; i++) {
89a36810
AR		 4917 pinstance->hrrq_start[i] =
4918 pci_alloc_consistent(
4919 pinstance->pdev,
4920 buffer_size,
4921 &(pinstance->hrrq_start_bus_addr[i]));
4922
4923 if (pinstance->hrrq_start[i] == 0) {
c20c4267
AR		 4924 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4925 i);
89a36810
AR		 4926 pmcraid_release_host_rrqs(pinstance, i);
4927 return -ENOMEM;
4928 }
4929
4930 memset(pinstance->hrrq_start[i], 0, buffer_size);
4931 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4932 pinstance->hrrq_end[i] =
c20c4267 4933 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
89a36810
AR		 4934 pinstance->host_toggle_bit[i] = 1;
4935 spin_lock_init(&pinstance->hrrq_lock[i]);
4936 }
4937 return 0;
4938}
4939
4940/**
4941 * pmcraid_release_hcams - release HCAM buffers
4942 *
4943 * @pinstance: pointer to per adapter instance structure
4944 *
4945 * Return value
4946 * none
4947 */
4948static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4949{
4950 if (pinstance->ccn.msg != NULL) {
4951 pci_free_consistent(pinstance->pdev,
4952 PMCRAID_AEN_HDR_SIZE +
c20c4267 4953 sizeof(struct pmcraid_hcam_ccn_ext),
89a36810
AR		 4954 pinstance->ccn.msg,
4955 pinstance->ccn.baddr);
4956
4957 pinstance->ccn.msg = NULL;
4958 pinstance->ccn.hcam = NULL;
4959 pinstance->ccn.baddr = 0;
4960 }
4961
4962 if (pinstance->ldn.msg != NULL) {
4963 pci_free_consistent(pinstance->pdev,
4964 PMCRAID_AEN_HDR_SIZE +
4965 sizeof(struct pmcraid_hcam_ldn),
4966 pinstance->ldn.msg,
4967 pinstance->ldn.baddr);
4968
4969 pinstance->ldn.msg = NULL;
4970 pinstance->ldn.hcam = NULL;
4971 pinstance->ldn.baddr = 0;
4972 }
4973}
4974
4975/**
4976 * pmcraid_allocate_hcams - allocates HCAM buffers
4977 * @pinstance : pointer to per adapter instance structure
4978 *
4979 * Return Value:
4980 * 0 in case of successful allocation, non-zero otherwise
4981 */
4982static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
4983{
4984 pinstance->ccn.msg = pci_alloc_consistent(
4985 pinstance->pdev,
4986 PMCRAID_AEN_HDR_SIZE +
c20c4267 4987 sizeof(struct pmcraid_hcam_ccn_ext),
89a36810
AR		 4988 &(pinstance->ccn.baddr));
4989
4990 pinstance->ldn.msg = pci_alloc_consistent(
4991 pinstance->pdev,
4992 PMCRAID_AEN_HDR_SIZE +
4993 sizeof(struct pmcraid_hcam_ldn),
4994 &(pinstance->ldn.baddr));
4995
4996 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
4997 pmcraid_release_hcams(pinstance);
4998 } else {
4999 pinstance->ccn.hcam =
5000 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
5001 pinstance->ldn.hcam =
5002 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
5003
5004 atomic_set(&pinstance->ccn.ignore, 0);
5005 atomic_set(&pinstance->ldn.ignore, 0);
5006 }
5007
5008 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
5009}
5010
5011/**
5012 * pmcraid_release_config_buffers - release config.table buffers
5013 * @pinstance: pointer to per adapter instance structure
5014 *
5015 * Return Value
5016 * none
5017 */
5018static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
5019{
5020 if (pinstance->cfg_table != NULL &&
5021 pinstance->cfg_table_bus_addr != 0) {
5022 pci_free_consistent(pinstance->pdev,
5023 sizeof(struct pmcraid_config_table),
5024 pinstance->cfg_table,
5025 pinstance->cfg_table_bus_addr);
5026 pinstance->cfg_table = NULL;
5027 pinstance->cfg_table_bus_addr = 0;
5028 }
5029
5030 if (pinstance->res_entries != NULL) {
5031 int i;
5032
5033 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5034 list_del(&pinstance->res_entries[i].queue);
5035 kfree(pinstance->res_entries);
5036 pinstance->res_entries = NULL;
5037 }
5038
5039 pmcraid_release_hcams(pinstance);
5040}
5041
5042/**
5043 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5044 * @pinstance : pointer to per adapter instance structure
5045 *
5046 * Return Value
5047 * 0 for successful allocation, -ENOMEM for any failure
5048 */
6f039790 5049static int pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
89a36810
AR		 5050{
5051 int i;
5052
5053 pinstance->res_entries =
5054 kzalloc(sizeof(struct pmcraid_resource_entry) *
5055 PMCRAID_MAX_RESOURCES, GFP_KERNEL);
5056
5057 if (NULL == pinstance->res_entries) {
5058 pmcraid_err("failed to allocate memory for resource table\n");
5059 return -ENOMEM;
5060 }
5061
5062 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5063 list_add_tail(&pinstance->res_entries[i].queue,
5064 &pinstance->free_res_q);
5065
5066 pinstance->cfg_table =
5067 pci_alloc_consistent(pinstance->pdev,
5068 sizeof(struct pmcraid_config_table),
5069 &pinstance->cfg_table_bus_addr);
5070
5071 if (NULL == pinstance->cfg_table) {
5072 pmcraid_err("couldn't alloc DMA memory for config table\n");
5073 pmcraid_release_config_buffers(pinstance);
5074 return -ENOMEM;
5075 }
5076
5077 if (pmcraid_allocate_hcams(pinstance)) {
5078 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5079 pmcraid_release_config_buffers(pinstance);
5080 return -ENOMEM;
5081 }
5082
5083 return 0;
5084}
5085
5086/**
5087 * pmcraid_init_tasklets - registers tasklets for response handling
5088 *
5089 * @pinstance: pointer adapter instance structure
5090 *
5091 * Return value
5092 * none
5093 */
5094static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
5095{
5096 int i;
5097 for (i = 0; i < pinstance->num_hrrq; i++)
5098 tasklet_init(&pinstance->isr_tasklet[i],
5099 pmcraid_tasklet_function,
5100 (unsigned long)&pinstance->hrrq_vector[i]);
5101}
5102
5103/**
5104 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5105 *
5106 * @pinstance: pointer to adapter instance structure
5107 *
5108 * Return value
5109 * none
5110 */
5111static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
5112{
5113 int i;
5114 for (i = 0; i < pinstance->num_hrrq; i++)
5115 tasklet_kill(&pinstance->isr_tasklet[i]);
5116}
5117
c20c4267
AR		 5118/**
5119 * pmcraid_release_buffers - release per-adapter buffers allocated
5120 *
5121 * @pinstance: pointer to adapter soft state
5122 *
5123 * Return Value
5124 * none
5125 */
5126static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
5127{
5128 pmcraid_release_config_buffers(pinstance);
5129 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
5130 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5131 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5132
5133 if (pinstance->inq_data != NULL) {
5134 pci_free_consistent(pinstance->pdev,
5135 sizeof(struct pmcraid_inquiry_data),
5136 pinstance->inq_data,
5137 pinstance->inq_data_baddr);
5138
5139 pinstance->inq_data = NULL;
5140 pinstance->inq_data_baddr = 0;
5141 }
592488a3
AR		 5142
5143 if (pinstance->timestamp_data != NULL) {
5144 pci_free_consistent(pinstance->pdev,
5145 sizeof(struct pmcraid_timestamp_data),
5146 pinstance->timestamp_data,
5147 pinstance->timestamp_data_baddr);
5148
5149 pinstance->timestamp_data = NULL;
5150 pinstance->timestamp_data_baddr = 0;
5151 }
c20c4267
AR		 5152}
5153
89a36810
AR		 5154/**
5155 * pmcraid_init_buffers - allocates memory and initializes various structures
5156 * @pinstance: pointer to per adapter instance structure
5157 *
5158 * This routine pre-allocates memory based on the type of block as below:
5159 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5160 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5161 * config-table entries : DMAable memory using pci_alloc_consistent
5162 * HostRRQs : DMAable memory, using pci_alloc_consistent
5163 *
5164 * Return Value
5165 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5166 */
6f039790 5167static int pmcraid_init_buffers(struct pmcraid_instance *pinstance)
89a36810
AR		 5168{
5169 int i;
5170
5171 if (pmcraid_allocate_host_rrqs(pinstance)) {
5172 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5173 pinstance->num_hrrq);
5174 return -ENOMEM;
5175 }
5176
5177 if (pmcraid_allocate_config_buffers(pinstance)) {
5178 pmcraid_err("couldn't allocate memory for config buffers\n");
5179 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5180 return -ENOMEM;
5181 }
5182
5183 if (pmcraid_allocate_cmd_blocks(pinstance)) {
c20c4267 5184 pmcraid_err("couldn't allocate memory for cmd blocks\n");
89a36810
AR		 5185 pmcraid_release_config_buffers(pinstance);
5186 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5187 return -ENOMEM;
5188 }
5189
5190 if (pmcraid_allocate_control_blocks(pinstance)) {
c20c4267 5191 pmcraid_err("couldn't allocate memory control blocks\n");
89a36810
AR		 5192 pmcraid_release_config_buffers(pinstance);
5193 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5194 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5195 return -ENOMEM;
5196 }
5197
c20c4267
AR		 5198 /* allocate DMAable memory for page D0 INQUIRY buffer */
5199 pinstance->inq_data = pci_alloc_consistent(
5200 pinstance->pdev,
5201 sizeof(struct pmcraid_inquiry_data),
5202 &pinstance->inq_data_baddr);
5203
5204 if (pinstance->inq_data == NULL) {
5205 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5206 pmcraid_release_buffers(pinstance);
5207 return -ENOMEM;
5208 }
5209
592488a3
AR		 5210 /* allocate DMAable memory for set timestamp data buffer */
5211 pinstance->timestamp_data = pci_alloc_consistent(
5212 pinstance->pdev,
5213 sizeof(struct pmcraid_timestamp_data),
5214 &pinstance->timestamp_data_baddr);
5215
5216 if (pinstance->timestamp_data == NULL) {
5217 pmcraid_err("couldn't allocate DMA memory for \
5218 set time_stamp \n");
5219 pmcraid_release_buffers(pinstance);
5220 return -ENOMEM;
5221 }
5222
5223
89a36810
AR		 5224 /* Initialize all the command blocks and add them to free pool. No
5225 * need to lock (free_pool_lock) as this is done in initialization
5226 * itself
5227 */
5228 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5229 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5230 pmcraid_init_cmdblk(cmdp, i);
5231 cmdp->drv_inst = pinstance;
5232 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5233 }
5234
5235 return 0;
5236}
5237
5238/**
5239 * pmcraid_reinit_buffers - resets various buffer pointers
5240 * @pinstance: pointer to adapter instance
5241 * Return value
c20c4267 5242 * none
89a36810
AR		 5243 */
5244static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5245{
5246 int i;
5247 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5248
5249 for (i = 0; i < pinstance->num_hrrq; i++) {
5250 memset(pinstance->hrrq_start[i], 0, buffer_size);
5251 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5252 pinstance->hrrq_end[i] =
5253 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5254 pinstance->host_toggle_bit[i] = 1;
5255 }
5256}
5257
5258/**
5259 * pmcraid_init_instance - initialize per instance data structure
5260 * @pdev: pointer to pci device structure
5261 * @host: pointer to Scsi_Host structure
5262 * @mapped_pci_addr: memory mapped IOA configuration registers
5263 *
5264 * Return Value
5265 * 0 on success, non-zero in case of any failure
5266 */
6f039790
GKH		 5267static int pmcraid_init_instance(struct pci_dev *pdev, struct Scsi_Host *host,
5268 void __iomem *mapped_pci_addr)
89a36810
AR		 5269{
5270 struct pmcraid_instance *pinstance =
5271 (struct pmcraid_instance *)host->hostdata;
5272
5273 pinstance->host = host;
5274 pinstance->pdev = pdev;
5275
5276 /* Initialize register addresses */
5277 pinstance->mapped_dma_addr = mapped_pci_addr;
5278
5279 /* Initialize chip-specific details */
5280 {
5281 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5282 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5283
5284 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5285
5286 pint_regs->ioa_host_interrupt_reg =
5287 mapped_pci_addr + chip_cfg->ioa_host_intr;
5288 pint_regs->ioa_host_interrupt_clr_reg =
5289 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
c20c4267
AR		 5290 pint_regs->ioa_host_msix_interrupt_reg =
5291 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
89a36810
AR		 5292 pint_regs->host_ioa_interrupt_reg =
5293 mapped_pci_addr + chip_cfg->host_ioa_intr;
5294 pint_regs->host_ioa_interrupt_clr_reg =
5295 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5296
5297 /* Current version of firmware exposes interrupt mask set
5298 * and mask clr registers through memory mapped bar0.
5299 */
5300 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5301 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5302 pint_regs->ioa_host_interrupt_mask_reg =
5303 mapped_pci_addr + chip_cfg->ioa_host_mask;
5304 pint_regs->ioa_host_interrupt_mask_clr_reg =
5305 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5306 pint_regs->global_interrupt_mask_reg =
5307 mapped_pci_addr + chip_cfg->global_intr_mask;
5308 };
5309
5310 pinstance->ioa_reset_attempts = 0;
5311 init_waitqueue_head(&pinstance->reset_wait_q);
5312
5313 atomic_set(&pinstance->outstanding_cmds, 0);
c20c4267 5314 atomic_set(&pinstance->last_message_id, 0);
89a36810
AR		 5315 atomic_set(&pinstance->expose_resources, 0);
5316
5317 INIT_LIST_HEAD(&pinstance->free_res_q);
5318 INIT_LIST_HEAD(&pinstance->used_res_q);
5319 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5320 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5321
5322 spin_lock_init(&pinstance->free_pool_lock);
5323 spin_lock_init(&pinstance->pending_pool_lock);
5324 spin_lock_init(&pinstance->resource_lock);
5325 mutex_init(&pinstance->aen_queue_lock);
5326
5327 /* Work-queue (Shared) for deferred processing error handling */
5328 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5329
5330 /* Initialize the default log_level */
5331 pinstance->current_log_level = pmcraid_log_level;
5332
5333 /* Setup variables required for reset engine */
5334 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5335 pinstance->reset_cmd = NULL;
5336 return 0;
5337}
5338
89a36810
AR		 5339/**
5340 * pmcraid_shutdown - shutdown adapter controller.
5341 * @pdev: pci device struct
5342 *
5343 * Issues an adapter shutdown to the card waits for its completion
5344 *
5345 * Return value
5346 * none
5347 */
5348static void pmcraid_shutdown(struct pci_dev *pdev)
5349{
5350 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5351 pmcraid_reset_bringdown(pinstance);
5352}
5353
5354
5355/**
5356 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5357 */
5358static unsigned short pmcraid_get_minor(void)
5359{
5360 int minor;
5361
5362 minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
5363 __set_bit(minor, pmcraid_minor);
5364 return minor;
5365}
5366
5367/**
5368 * pmcraid_release_minor - releases given minor back to minor number bitmap
5369 */
5370static void pmcraid_release_minor(unsigned short minor)
5371{
5372 __clear_bit(minor, pmcraid_minor);
5373}
5374
5375/**
5376 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5377 *
5378 * @pinstance: pointer to adapter instance for which to register device
5379 *
5380 * Return value
5381 * 0 in case of success, otherwise non-zero
5382 */
5383static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5384{
5385 int minor;
5386 int error;
5387
5388 minor = pmcraid_get_minor();
5389 cdev_init(&pinstance->cdev, &pmcraid_fops);
5390 pinstance->cdev.owner = THIS_MODULE;
5391
5392 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5393
5394 if (error)
5395 pmcraid_release_minor(minor);
5396 else
5397 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
c20c4267 5398 NULL, "%s%u", PMCRAID_DEVFILE, minor);
89a36810
AR		 5399 return error;
5400}
5401
5402/**
5403 * pmcraid_release_chrdev - unregisters per-adapter management interface
5404 *
5405 * @pinstance: pointer to adapter instance structure
5406 *
5407 * Return value
5408 * none
5409 */
5410static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5411{
5412 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5413 device_destroy(pmcraid_class,
5414 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5415 cdev_del(&pinstance->cdev);
5416}
5417
5418/**
5419 * pmcraid_remove - IOA hot plug remove entry point
5420 * @pdev: pci device struct
5421 *
5422 * Return value
5423 * none
5424 */
6f039790 5425static void pmcraid_remove(struct pci_dev *pdev)
89a36810
AR		 5426{
5427 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5428
5429 /* remove the management interface (/dev file) for this device */
5430 pmcraid_release_chrdev(pinstance);
5431
5432 /* remove host template from scsi midlayer */
5433 scsi_remove_host(pinstance->host);
5434
5435 /* block requests from mid-layer */
5436 scsi_block_requests(pinstance->host);
5437
5438 /* initiate shutdown adapter */
5439 pmcraid_shutdown(pdev);
5440
5441 pmcraid_disable_interrupts(pinstance, ~0);
43829731 5442 flush_work(&pinstance->worker_q);
89a36810
AR		 5443
5444 pmcraid_kill_tasklets(pinstance);
5445 pmcraid_unregister_interrupt_handler(pinstance);
5446 pmcraid_release_buffers(pinstance);
5447 iounmap(pinstance->mapped_dma_addr);
5448 pci_release_regions(pdev);
5449 scsi_host_put(pinstance->host);
5450 pci_disable_device(pdev);
5451
5452 return;
5453}
5454
5455#ifdef CONFIG_PM
5456/**
5457 * pmcraid_suspend - driver suspend entry point for power management
5458 * @pdev: PCI device structure
5459 * @state: PCI power state to suspend routine
5460 *
5461 * Return Value - 0 always
5462 */
5463static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
5464{
5465 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5466
5467 pmcraid_shutdown(pdev);
5468 pmcraid_disable_interrupts(pinstance, ~0);
5469 pmcraid_kill_tasklets(pinstance);
5470 pci_set_drvdata(pinstance->pdev, pinstance);
5471 pmcraid_unregister_interrupt_handler(pinstance);
5472 pci_save_state(pdev);
5473 pci_disable_device(pdev);
5474 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5475
5476 return 0;
5477}
5478
5479/**
5480 * pmcraid_resume - driver resume entry point PCI power management
5481 * @pdev: PCI device structure
5482 *
5483 * Return Value - 0 in case of success. Error code in case of any failure
5484 */
5485static int pmcraid_resume(struct pci_dev *pdev)
5486{
5487 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5488 struct Scsi_Host *host = pinstance->host;
5489 int rc;
89a36810
AR		 5490
5491 pci_set_power_state(pdev, PCI_D0);
5492 pci_enable_wake(pdev, PCI_D0, 0);
5493 pci_restore_state(pdev);
5494
5495 rc = pci_enable_device(pdev);
5496
5497 if (rc) {
34876402 5498 dev_err(&pdev->dev, "resume: Enable device failed\n");
89a36810
AR		 5499 return rc;
5500 }
5501
5502 pci_set_master(pdev);
5503
5504 if ((sizeof(dma_addr_t) == 4) ||
5505 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5506 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5507
5508 if (rc == 0)
5509 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5510
5511 if (rc != 0) {
34876402 5512 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
89a36810
AR		 5513 goto disable_device;
5514 }
5515
c20c4267 5516 pmcraid_disable_interrupts(pinstance, ~0);
89a36810 5517 atomic_set(&pinstance->outstanding_cmds, 0);
89a36810
AR		 5518 rc = pmcraid_register_interrupt_handler(pinstance);
5519
5520 if (rc) {
34876402
AR		 5521 dev_err(&pdev->dev,
5522 "resume: couldn't register interrupt handlers\n");
89a36810
AR		 5523 rc = -ENODEV;
5524 goto release_host;
5525 }
5526
5527 pmcraid_init_tasklets(pinstance);
5528 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5529
5530 /* Start with hard reset sequence which brings up IOA to operational
5531 * state as well as completes the reset sequence.
5532 */
5533 pinstance->ioa_hard_reset = 1;
5534
5535 /* Start IOA firmware initialization and bring card to Operational
5536 * state.
5537 */
5538 if (pmcraid_reset_bringup(pinstance)) {
c20c4267 5539 dev_err(&pdev->dev, "couldn't initialize IOA\n");
89a36810
AR		 5540 rc = -ENODEV;
5541 goto release_tasklets;
5542 }
5543
5544 return 0;
5545
5546release_tasklets:
c20c4267 5547 pmcraid_disable_interrupts(pinstance, ~0);
89a36810
AR		 5548 pmcraid_kill_tasklets(pinstance);
5549 pmcraid_unregister_interrupt_handler(pinstance);
5550
5551release_host:
5552 scsi_host_put(host);
5553
5554disable_device:
5555 pci_disable_device(pdev);
5556
5557 return rc;
5558}
5559
5560#else
5561
5562#define pmcraid_suspend NULL
5563#define pmcraid_resume NULL
5564
5565#endif /* CONFIG_PM */
5566
5567/**
5568 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
c20c4267 5569 * completion of the ioa reset
89a36810
AR		 5570 * @cmd: pointer to reset command block
5571 */
5572static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5573{
5574 struct pmcraid_instance *pinstance = cmd->drv_inst;
5575 unsigned long flags;
5576
5577 spin_lock_irqsave(pinstance->host->host_lock, flags);
5578 pmcraid_ioa_reset(cmd);
5579 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5580 scsi_unblock_requests(pinstance->host);
5581 schedule_work(&pinstance->worker_q);
5582}
5583
5584/**
5585 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5586 *
5587 * @cmd: pointer to pmcraid_cmd structure
5588 *
5589 * Return Value
5590 * 0 for success or non-zero for failure cases
5591 */
5592static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5593{
5594 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5595 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5596
5597 pmcraid_reinit_cmdblk(cmd);
5598
5599 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5600 ioarcb->request_type = REQ_TYPE_IOACMD;
5601 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5602 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5603
5604 /* If this was called as part of resource table reinitialization due to
5605 * lost CCN, it is enough to return the command block back to free pool
5606 * as part of set_supported_devs completion function.
5607 */
5608 if (cmd->drv_inst->reinit_cfg_table) {
5609 cmd->drv_inst->reinit_cfg_table = 0;
5610 cmd->release = 1;
5611 cmd_done = pmcraid_reinit_cfgtable_done;
5612 }
5613
5614 /* we will be done with the reset sequence after set supported devices,
5615 * setup the done function to return the command block back to free
5616 * pool
5617 */
5618 pmcraid_send_cmd(cmd,
5619 cmd_done,
5620 PMCRAID_SET_SUP_DEV_TIMEOUT,
5621 pmcraid_timeout_handler);
5622 return;
5623}
5624
592488a3
AR		 5625/**
5626 * pmcraid_set_timestamp - set the timestamp to IOAFP
5627 *
5628 * @cmd: pointer to pmcraid_cmd structure
5629 *
5630 * Return Value
5631 * 0 for success or non-zero for failure cases
5632 */
5633static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5634{
5635 struct pmcraid_instance *pinstance = cmd->drv_inst;
5636 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5637 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5638 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5639
5640 struct timeval tv;
5641 __le64 timestamp;
5642
5643 do_gettimeofday(&tv);
5644 timestamp = tv.tv_sec * 1000;
5645
5646 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5647 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5648 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5649 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5650 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5651 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5652
5653 pmcraid_reinit_cmdblk(cmd);
5654 ioarcb->request_type = REQ_TYPE_SCSI;
5655 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5656 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5657 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5658 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5659
5660 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5661 offsetof(struct pmcraid_ioarcb,
5662 add_data.u.ioadl[0]));
5663 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5664 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5665
5666 ioarcb->request_flags0 |= NO_LINK_DESCS;
5667 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5668 ioarcb->data_transfer_length =
5669 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5670 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5671 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5672 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5673 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5674
5675 if (!pinstance->timestamp_error) {
5676 pinstance->timestamp_error = 0;
5677 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5678 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5679 } else {
5680 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5681 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5682 return;
5683 }
5684}
5685
5686
89a36810
AR		 5687/**
5688 * pmcraid_init_res_table - Initialize the resource table
5689 * @cmd: pointer to pmcraid command struct
5690 *
5691 * This function looks through the existing resource table, comparing
5692 * it with the config table. This function will take care of old/new
5693 * devices and schedule adding/removing them from the mid-layer
5694 * as appropriate.
5695 *
5696 * Return value
5697 * None
5698 */
5699static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5700{
5701 struct pmcraid_instance *pinstance = cmd->drv_inst;
5702 struct pmcraid_resource_entry *res, *temp;
5703 struct pmcraid_config_table_entry *cfgte;
5704 unsigned long lock_flags;
5705 int found, rc, i;
c20c4267 5706 u16 fw_version;
89a36810
AR		 5707 LIST_HEAD(old_res);
5708
5709 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
34876402 5710 pmcraid_err("IOA requires microcode download\n");
89a36810 5711
c20c4267
AR		 5712 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5713
89a36810
AR		 5714 /* resource list is protected by pinstance->resource_lock.
5715 * init_res_table can be called from probe (user-thread) or runtime
5716 * reset (timer/tasklet)
5717 */
5718 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5719
5720 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5721 list_move_tail(&res->queue, &old_res);
5722
5723 for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
c20c4267
AR		 5724 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5725 PMCRAID_FW_VERSION_1)
5726 cfgte = &pinstance->cfg_table->entries[i];
5727 else
5728 cfgte = (struct pmcraid_config_table_entry *)
5729 &pinstance->cfg_table->entries_ext[i];
89a36810 5730
c20c4267 5731 if (!pmcraid_expose_resource(fw_version, cfgte))
89a36810
AR		 5732 continue;
5733
5734 found = 0;
5735
5736 /* If this entry was already detected and initialized */
5737 list_for_each_entry_safe(res, temp, &old_res, queue) {
5738
5739 rc = memcmp(&res->cfg_entry.resource_address,
5740 &cfgte->resource_address,
5741 sizeof(cfgte->resource_address));
5742 if (!rc) {
5743 list_move_tail(&res->queue,
5744 &pinstance->used_res_q);
5745 found = 1;
5746 break;
5747 }
5748 }
5749
5750 /* If this is new entry, initialize it and add it the queue */
5751 if (!found) {
5752
5753 if (list_empty(&pinstance->free_res_q)) {
34876402 5754 pmcraid_err("Too many devices attached\n");
89a36810
AR		 5755 break;
5756 }
5757
5758 found = 1;
5759 res = list_entry(pinstance->free_res_q.next,
5760 struct pmcraid_resource_entry, queue);
5761
5762 res->scsi_dev = NULL;
5763 res->change_detected = RES_CHANGE_ADD;
5764 res->reset_progress = 0;
5765 list_move_tail(&res->queue, &pinstance->used_res_q);
5766 }
5767
5768 /* copy new configuration table entry details into driver
5769 * maintained resource entry
5770 */
5771 if (found) {
5772 memcpy(&res->cfg_entry, cfgte,
c20c4267 5773 pinstance->config_table_entry_size);
89a36810
AR		 5774 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5775 res->cfg_entry.resource_type,
c20c4267
AR		 5776 (fw_version <= PMCRAID_FW_VERSION_1 ?
5777 res->cfg_entry.unique_flags1 :
5778 res->cfg_entry.array_id & 0xFF),
89a36810
AR		 5779 le32_to_cpu(res->cfg_entry.resource_address));
5780 }
5781 }
5782
5783 /* Detect any deleted entries, mark them for deletion from mid-layer */
5784 list_for_each_entry_safe(res, temp, &old_res, queue) {
5785
5786 if (res->scsi_dev) {
5787 res->change_detected = RES_CHANGE_DEL;
5788 res->cfg_entry.resource_handle =
5789 PMCRAID_INVALID_RES_HANDLE;
5790 list_move_tail(&res->queue, &pinstance->used_res_q);
5791 } else {
5792 list_move_tail(&res->queue, &pinstance->free_res_q);
5793 }
5794 }
5795
5796 /* release the resource list lock */
5797 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
592488a3 5798 pmcraid_set_timestamp(cmd);
89a36810
AR		 5799}
5800
5801/**
5802 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5803 * @cmd: pointer pmcraid_cmd struct
5804 *
5805 * This function sends a Query IOA Configuration command to the adapter to
5806 * retrieve the IOA configuration table.
5807 *
5808 * Return value:
5809 * none
5810 */
5811static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5812{
5813 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5814 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5815 struct pmcraid_instance *pinstance = cmd->drv_inst;
5816 int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5817
c20c4267
AR		 5818 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5819 PMCRAID_FW_VERSION_1)
5820 pinstance->config_table_entry_size =
5821 sizeof(struct pmcraid_config_table_entry);
5822 else
5823 pinstance->config_table_entry_size =
5824 sizeof(struct pmcraid_config_table_entry_ext);
5825
89a36810
AR		 5826 ioarcb->request_type = REQ_TYPE_IOACMD;
5827 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5828
5829 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5830
5831 /* firmware requires 4-byte length field, specified in B.E format */
5832 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5833
5834 /* Since entire config table can be described by single IOADL, it can
5835 * be part of IOARCB itself
5836 */
5837 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5838 offsetof(struct pmcraid_ioarcb,
5839 add_data.u.ioadl[0]));
5840 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5841 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5842
5843 ioarcb->request_flags0 |= NO_LINK_DESCS;
5844 ioarcb->data_transfer_length =
5845 cpu_to_le32(sizeof(struct pmcraid_config_table));
5846
5847 ioadl = &(ioarcb->add_data.u.ioadl[0]);
88197966 5848 ioadl->flags = IOADL_FLAGS_LAST_DESC;
89a36810
AR		 5849 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5850 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5851
5852 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5853 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5854}
5855
5856
5857/**
c20c4267 5858 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
89a36810
AR		 5859 * @pdev: pointer to pci device structure
5860 * @dev_id: pointer to device ids structure
5861 *
5862 * Return Value
5863 * returns 0 if the device is claimed and successfully configured.
5864 * returns non-zero error code in case of any failure
5865 */
6f039790
GKH		 5866static int pmcraid_probe(struct pci_dev *pdev,
5867 const struct pci_device_id *dev_id)
89a36810
AR		 5868{
5869 struct pmcraid_instance *pinstance;
5870 struct Scsi_Host *host;
5871 void __iomem *mapped_pci_addr;
5872 int rc = PCIBIOS_SUCCESSFUL;
5873
5874 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5875 pmcraid_err
5876 ("maximum number(%d) of supported adapters reached\n",
5877 atomic_read(&pmcraid_adapter_count));
5878 return -ENOMEM;
5879 }
5880
5881 atomic_inc(&pmcraid_adapter_count);
5882 rc = pci_enable_device(pdev);
5883
5884 if (rc) {
5885 dev_err(&pdev->dev, "Cannot enable adapter\n");
5886 atomic_dec(&pmcraid_adapter_count);
5887 return rc;
5888 }
5889
5890 dev_info(&pdev->dev,
5891 "Found new IOA(%x:%x), Total IOA count: %d\n",
5892 pdev->vendor, pdev->device,
5893 atomic_read(&pmcraid_adapter_count));
5894
5895 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5896
5897 if (rc < 0) {
5898 dev_err(&pdev->dev,
5899 "Couldn't register memory range of registers\n");
5900 goto out_disable_device;
5901 }
5902
5903 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5904
5905 if (!mapped_pci_addr) {
5906 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5907 rc = -ENOMEM;
5908 goto out_release_regions;
5909 }
5910
5911 pci_set_master(pdev);
5912
5913 /* Firmware requires the system bus address of IOARCB to be within
5914 * 32-bit addressable range though it has 64-bit IOARRIN register.
5915 * However, firmware supports 64-bit streaming DMA buffers, whereas
5916 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5917 * returns memory within 4GB (if not, change this logic), coherent
25985edc 5918 * buffers are within firmware acceptable address ranges.
89a36810
AR		 5919 */
5920 if ((sizeof(dma_addr_t) == 4) ||
5921 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5922 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5923
5924 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5925 * bit mask for pci_alloc_consistent to return addresses within 4GB
5926 */
5927 if (rc == 0)
5928 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5929
5930 if (rc != 0) {
5931 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5932 goto cleanup_nomem;
5933 }
5934
5935 host = scsi_host_alloc(&pmcraid_host_template,
5936 sizeof(struct pmcraid_instance));
5937
5938 if (!host) {
5939 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5940 rc = -ENOMEM;
5941 goto cleanup_nomem;
5942 }
5943
5944 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5945 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5946 host->unique_id = host->host_no;
5947 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5948 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5949
5950 /* zero out entire instance structure */
5951 pinstance = (struct pmcraid_instance *)host->hostdata;
5952 memset(pinstance, 0, sizeof(*pinstance));
5953
5954 pinstance->chip_cfg =
5955 (struct pmcraid_chip_details *)(dev_id->driver_data);
5956
5957 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5958
5959 if (rc < 0) {
5960 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5961 goto out_scsi_host_put;
5962 }
5963
5964 pci_set_drvdata(pdev, pinstance);
5965
5966 /* Save PCI config-space for use following the reset */
5967 rc = pci_save_state(pinstance->pdev);
5968
5969 if (rc != 0) {
5970 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5971 goto out_scsi_host_put;
5972 }
5973
5974 pmcraid_disable_interrupts(pinstance, ~0);
5975
5976 rc = pmcraid_register_interrupt_handler(pinstance);
5977
5978 if (rc) {
34876402 5979 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
89a36810
AR		 5980 goto out_scsi_host_put;
5981 }
5982
5983 pmcraid_init_tasklets(pinstance);
5984
5985 /* allocate verious buffers used by LLD.*/
5986 rc = pmcraid_init_buffers(pinstance);
5987
5988 if (rc) {
5989 pmcraid_err("couldn't allocate memory blocks\n");
5990 goto out_unregister_isr;
5991 }
5992
5993 /* check the reset type required */
5994 pmcraid_reset_type(pinstance);
5995
5996 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5997
5998 /* Start IOA firmware initialization and bring card to Operational
5999 * state.
6000 */
6001 pmcraid_info("starting IOA initialization sequence\n");
6002 if (pmcraid_reset_bringup(pinstance)) {
c20c4267 6003 dev_err(&pdev->dev, "couldn't initialize IOA\n");
89a36810
AR		 6004 rc = 1;
6005 goto out_release_bufs;
6006 }
6007
6008 /* Add adapter instance into mid-layer list */
6009 rc = scsi_add_host(pinstance->host, &pdev->dev);
6010 if (rc != 0) {
6011 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
6012 goto out_release_bufs;
6013 }
6014
6015 scsi_scan_host(pinstance->host);
6016
6017 rc = pmcraid_setup_chrdev(pinstance);
6018
6019 if (rc != 0) {
6020 pmcraid_err("couldn't create mgmt interface, error: %x\n",
6021 rc);
6022 goto out_remove_host;
6023 }
6024
6025 /* Schedule worker thread to handle CCN and take care of adding and
6026 * removing devices to OS
6027 */
6028 atomic_set(&pinstance->expose_resources, 1);
6029 schedule_work(&pinstance->worker_q);
6030 return rc;
6031
6032out_remove_host:
6033 scsi_remove_host(host);
6034
6035out_release_bufs:
6036 pmcraid_release_buffers(pinstance);
6037
6038out_unregister_isr:
6039 pmcraid_kill_tasklets(pinstance);
6040 pmcraid_unregister_interrupt_handler(pinstance);
6041
6042out_scsi_host_put:
6043 scsi_host_put(host);
6044
6045cleanup_nomem:
6046 iounmap(mapped_pci_addr);
6047
6048out_release_regions:
6049 pci_release_regions(pdev);
6050
6051out_disable_device:
6052 atomic_dec(&pmcraid_adapter_count);
6053 pci_set_drvdata(pdev, NULL);
6054 pci_disable_device(pdev);
6055 return -ENODEV;
6056}
6057
6058/*
6059 * PCI driver structure of pcmraid driver
6060 */
6061static struct pci_driver pmcraid_driver = {
6062 .name = PMCRAID_DRIVER_NAME,
6063 .id_table = pmcraid_pci_table,
6064 .probe = pmcraid_probe,
6065 .remove = pmcraid_remove,
6066 .suspend = pmcraid_suspend,
6067 .resume = pmcraid_resume,
6068 .shutdown = pmcraid_shutdown
6069};
6070
89a36810
AR		 6071/**
6072 * pmcraid_init - module load entry point
6073 */
6074static int __init pmcraid_init(void)
6075{
6076 dev_t dev;
6077 int error;
6078
a1b66665
MM		 6079 pmcraid_info("%s Device Driver version: %s\n",
6080 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
89a36810
AR		 6081
6082 error = alloc_chrdev_region(&dev, 0,
6083 PMCRAID_MAX_ADAPTERS,
6084 PMCRAID_DEVFILE);
6085
6086 if (error) {
6087 pmcraid_err("failed to get a major number for adapters\n");
6088 goto out_init;
6089 }
6090
6091 pmcraid_major = MAJOR(dev);
6092 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
6093
6094 if (IS_ERR(pmcraid_class)) {
6095 error = PTR_ERR(pmcraid_class);
6096 pmcraid_err("failed to register with with sysfs, error = %x\n",
6097 error);
6098 goto out_unreg_chrdev;
6099 }
6100
89a36810
AR		 6101 error = pmcraid_netlink_init();
6102
6103 if (error)
6104 goto out_unreg_chrdev;
6105
6106 error = pci_register_driver(&pmcraid_driver);
6107
6108 if (error == 0)
6109 goto out_init;
6110
6111 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6112 error);
6113 class_destroy(pmcraid_class);
6114 pmcraid_netlink_release();
6115
6116out_unreg_chrdev:
6117 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
34876402 6118
89a36810
AR		 6119out_init:
6120 return error;
6121}
6122
6123/**
6124 * pmcraid_exit - module unload entry point
6125 */
6126static void __exit pmcraid_exit(void)
6127{
6128 pmcraid_netlink_release();
89a36810
AR		 6129 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
6130 PMCRAID_MAX_ADAPTERS);
6131 pci_unregister_driver(&pmcraid_driver);
592488a3 6132 class_destroy(pmcraid_class);
89a36810
AR		 6133}
6134
6135module_init(pmcraid_init);
6136module_exit(pmcraid_exit);
kernel source for telekom puls (alcatel/mediatek)