2 * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
4 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
7 * Copyright (C) 2008, 2009 PMC Sierra Inc
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.
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.
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,
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>
43 #include <linux/slab.h>
45 #include <asm/processor.h>
46 #include <linux/libata.h>
47 #include <linux/mutex.h>
48 #include <linux/ktime.h>
49 #include <scsi/scsi.h>
50 #include <scsi/scsi_host.h>
51 #include <scsi/scsi_device.h>
52 #include <scsi/scsi_tcq.h>
53 #include <scsi/scsi_eh.h>
54 #include <scsi/scsi_cmnd.h>
55 #include <scsi/scsicam.h>
60 * Module configuration parameters
62 static unsigned int pmcraid_debug_log
;
63 static unsigned int pmcraid_disable_aen
;
64 static unsigned int pmcraid_log_level
= IOASC_LOG_LEVEL_MUST
;
65 static unsigned int pmcraid_enable_msix
;
68 * Data structures to support multiple adapters by the LLD.
69 * pmcraid_adapter_count - count of configured adapters
71 static atomic_t pmcraid_adapter_count
= ATOMIC_INIT(0);
74 * Supporting user-level control interface through IOCTL commands.
75 * pmcraid_major - major number to use
76 * pmcraid_minor - minor number(s) to use
78 static unsigned int pmcraid_major
;
79 static struct class *pmcraid_class
;
80 DECLARE_BITMAP(pmcraid_minor
, PMCRAID_MAX_ADAPTERS
);
85 MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
86 MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION(PMCRAID_DRIVER_VERSION
);
90 module_param_named(log_level
, pmcraid_log_level
, uint
, (S_IRUGO
| S_IWUSR
));
91 MODULE_PARM_DESC(log_level
,
92 "Enables firmware error code logging, default :1 high-severity"
93 " errors, 2: all errors including high-severity errors,"
94 " 0: disables logging");
96 module_param_named(debug
, pmcraid_debug_log
, uint
, (S_IRUGO
| S_IWUSR
));
97 MODULE_PARM_DESC(debug
,
98 "Enable driver verbose message logging. Set 1 to enable."
101 module_param_named(disable_aen
, pmcraid_disable_aen
, uint
, (S_IRUGO
| S_IWUSR
));
102 MODULE_PARM_DESC(disable_aen
,
103 "Disable driver aen notifications to apps. Set 1 to disable."
106 /* chip specific constants for PMC MaxRAID controllers (same for
109 static struct pmcraid_chip_details pmcraid_chip_cfg
[] = {
114 .global_intr_mask
= 0x00034,
115 .ioa_host_intr
= 0x0009C,
116 .ioa_host_intr_clr
= 0x000A0,
117 .ioa_host_msix_intr
= 0x7FC40,
118 .ioa_host_mask
= 0x7FC28,
119 .ioa_host_mask_clr
= 0x7FC28,
120 .host_ioa_intr
= 0x00020,
121 .host_ioa_intr_clr
= 0x00020,
122 .transop_timeout
= 300
127 * PCI device ids supported by pmcraid driver
129 static struct pci_device_id pmcraid_pci_table
[] = {
130 { PCI_DEVICE(PCI_VENDOR_ID_PMC
, PCI_DEVICE_ID_PMC_MAXRAID
),
131 0, 0, (kernel_ulong_t
)&pmcraid_chip_cfg
[0]
136 MODULE_DEVICE_TABLE(pci
, pmcraid_pci_table
);
141 * pmcraid_slave_alloc - Prepare for commands to a device
142 * @scsi_dev: scsi device struct
144 * This function is called by mid-layer prior to sending any command to the new
145 * device. Stores resource entry details of the device in scsi_device struct.
146 * Queuecommand uses the resource handle and other details to fill up IOARCB
147 * while sending commands to the device.
150 * 0 on success / -ENXIO if device does not exist
152 static int pmcraid_slave_alloc(struct scsi_device
*scsi_dev
)
154 struct pmcraid_resource_entry
*temp
, *res
= NULL
;
155 struct pmcraid_instance
*pinstance
;
157 unsigned long lock_flags
;
161 pinstance
= shost_priv(scsi_dev
->host
);
163 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
165 /* Driver exposes VSET and GSCSI resources only; all other device types
166 * are not exposed. Resource list is synchronized using resource lock
167 * so any traversal or modifications to the list should be done inside
170 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
171 list_for_each_entry(temp
, &pinstance
->used_res_q
, queue
) {
173 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
174 if (RES_IS_VSET(temp
->cfg_entry
)) {
175 if (fw_version
<= PMCRAID_FW_VERSION_1
)
176 target
= temp
->cfg_entry
.unique_flags1
;
178 target
= temp
->cfg_entry
.array_id
& 0xFF;
180 if (target
> PMCRAID_MAX_VSET_TARGETS
)
182 bus
= PMCRAID_VSET_BUS_ID
;
184 } else if (RES_IS_GSCSI(temp
->cfg_entry
)) {
185 target
= RES_TARGET(temp
->cfg_entry
.resource_address
);
186 bus
= PMCRAID_PHYS_BUS_ID
;
187 lun
= RES_LUN(temp
->cfg_entry
.resource_address
);
192 if (bus
== scsi_dev
->channel
&&
193 target
== scsi_dev
->id
&&
194 lun
== scsi_dev
->lun
) {
201 res
->scsi_dev
= scsi_dev
;
202 scsi_dev
->hostdata
= res
;
203 res
->change_detected
= 0;
204 atomic_set(&res
->read_failures
, 0);
205 atomic_set(&res
->write_failures
, 0);
208 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
213 * pmcraid_slave_configure - Configures a SCSI device
214 * @scsi_dev: scsi device struct
216 * This function is executed by SCSI mid layer just after a device is first
217 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
218 * timeout value (default 30s) will be over-written to a higher value (60s)
219 * and max_sectors value will be over-written to 512. It also sets queue depth
220 * to host->cmd_per_lun value
225 static int pmcraid_slave_configure(struct scsi_device
*scsi_dev
)
227 struct pmcraid_resource_entry
*res
= scsi_dev
->hostdata
;
232 /* LLD exposes VSETs and Enclosure devices only */
233 if (RES_IS_GSCSI(res
->cfg_entry
) &&
234 scsi_dev
->type
!= TYPE_ENCLOSURE
)
237 pmcraid_info("configuring %x:%x:%x:%x\n",
238 scsi_dev
->host
->unique_id
,
243 if (RES_IS_GSCSI(res
->cfg_entry
)) {
244 scsi_dev
->allow_restart
= 1;
245 } else if (RES_IS_VSET(res
->cfg_entry
)) {
246 scsi_dev
->allow_restart
= 1;
247 blk_queue_rq_timeout(scsi_dev
->request_queue
,
248 PMCRAID_VSET_IO_TIMEOUT
);
249 blk_queue_max_hw_sectors(scsi_dev
->request_queue
,
250 PMCRAID_VSET_MAX_SECTORS
);
254 * We never want to report TCQ support for these types of devices.
256 if (!RES_IS_GSCSI(res
->cfg_entry
) && !RES_IS_VSET(res
->cfg_entry
))
257 scsi_dev
->tagged_supported
= 0;
263 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
265 * @scsi_dev: scsi device struct
267 * This is called by mid-layer before removing a device. Pointer assignments
268 * done in pmcraid_slave_alloc will be reset to NULL here.
273 static void pmcraid_slave_destroy(struct scsi_device
*scsi_dev
)
275 struct pmcraid_resource_entry
*res
;
277 res
= (struct pmcraid_resource_entry
*)scsi_dev
->hostdata
;
280 res
->scsi_dev
= NULL
;
282 scsi_dev
->hostdata
= NULL
;
286 * pmcraid_change_queue_depth - Change the device's queue depth
287 * @scsi_dev: scsi device struct
288 * @depth: depth to set
293 static int pmcraid_change_queue_depth(struct scsi_device
*scsi_dev
, int depth
)
295 if (depth
> PMCRAID_MAX_CMD_PER_LUN
)
296 depth
= PMCRAID_MAX_CMD_PER_LUN
;
297 return scsi_change_queue_depth(scsi_dev
, depth
);
301 * pmcraid_init_cmdblk - initializes a command block
303 * @cmd: pointer to struct pmcraid_cmd to be initialized
304 * @index: if >=0 first time initialization; otherwise reinitialization
309 static void pmcraid_init_cmdblk(struct pmcraid_cmd
*cmd
, int index
)
311 struct pmcraid_ioarcb
*ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
312 dma_addr_t dma_addr
= cmd
->ioa_cb_bus_addr
;
315 /* first time initialization (called from probe) */
317 offsetof(struct pmcraid_control_block
, ioasa
);
320 ioarcb
->response_handle
= cpu_to_le32(index
<< 2);
321 ioarcb
->ioarcb_bus_addr
= cpu_to_le64(dma_addr
);
322 ioarcb
->ioasa_bus_addr
= cpu_to_le64(dma_addr
+ ioasa_offset
);
323 ioarcb
->ioasa_len
= cpu_to_le16(sizeof(struct pmcraid_ioasa
));
325 /* re-initialization of various lengths, called once command is
328 memset(&cmd
->ioa_cb
->ioarcb
.cdb
, 0, PMCRAID_MAX_CDB_LEN
);
330 ioarcb
->request_flags0
= 0;
331 ioarcb
->request_flags1
= 0;
332 ioarcb
->cmd_timeout
= 0;
333 ioarcb
->ioarcb_bus_addr
&= (~0x1FULL
);
334 ioarcb
->ioadl_bus_addr
= 0;
335 ioarcb
->ioadl_length
= 0;
336 ioarcb
->data_transfer_length
= 0;
337 ioarcb
->add_cmd_param_length
= 0;
338 ioarcb
->add_cmd_param_offset
= 0;
339 cmd
->ioa_cb
->ioasa
.ioasc
= 0;
340 cmd
->ioa_cb
->ioasa
.residual_data_length
= 0;
344 cmd
->cmd_done
= NULL
;
345 cmd
->scsi_cmd
= NULL
;
347 cmd
->completion_req
= 0;
348 cmd
->sense_buffer
= 0;
349 cmd
->sense_buffer_dma
= 0;
351 init_timer(&cmd
->timer
);
355 * pmcraid_reinit_cmdblk - reinitialize a command block
357 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
362 static void pmcraid_reinit_cmdblk(struct pmcraid_cmd
*cmd
)
364 pmcraid_init_cmdblk(cmd
, -1);
368 * pmcraid_get_free_cmd - get a free cmd block from command block pool
369 * @pinstance: adapter instance structure
372 * returns pointer to cmd block or NULL if no blocks are available
374 static struct pmcraid_cmd
*pmcraid_get_free_cmd(
375 struct pmcraid_instance
*pinstance
378 struct pmcraid_cmd
*cmd
= NULL
;
379 unsigned long lock_flags
;
381 /* free cmd block list is protected by free_pool_lock */
382 spin_lock_irqsave(&pinstance
->free_pool_lock
, lock_flags
);
384 if (!list_empty(&pinstance
->free_cmd_pool
)) {
385 cmd
= list_entry(pinstance
->free_cmd_pool
.next
,
386 struct pmcraid_cmd
, free_list
);
387 list_del(&cmd
->free_list
);
389 spin_unlock_irqrestore(&pinstance
->free_pool_lock
, lock_flags
);
391 /* Initialize the command block before giving it the caller */
393 pmcraid_reinit_cmdblk(cmd
);
398 * pmcraid_return_cmd - return a completed command block back into free pool
399 * @cmd: pointer to the command block
404 static void pmcraid_return_cmd(struct pmcraid_cmd
*cmd
)
406 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
407 unsigned long lock_flags
;
409 spin_lock_irqsave(&pinstance
->free_pool_lock
, lock_flags
);
410 list_add_tail(&cmd
->free_list
, &pinstance
->free_cmd_pool
);
411 spin_unlock_irqrestore(&pinstance
->free_pool_lock
, lock_flags
);
415 * pmcraid_read_interrupts - reads IOA interrupts
417 * @pinstance: pointer to adapter instance structure
420 * interrupts read from IOA
422 static u32
pmcraid_read_interrupts(struct pmcraid_instance
*pinstance
)
424 return (pinstance
->interrupt_mode
) ?
425 ioread32(pinstance
->int_regs
.ioa_host_msix_interrupt_reg
) :
426 ioread32(pinstance
->int_regs
.ioa_host_interrupt_reg
);
430 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
432 * @pinstance: pointer to per adapter instance structure
433 * @intrs: interrupts to disable
438 static void pmcraid_disable_interrupts(
439 struct pmcraid_instance
*pinstance
,
443 u32 gmask
= ioread32(pinstance
->int_regs
.global_interrupt_mask_reg
);
444 u32 nmask
= gmask
| GLOBAL_INTERRUPT_MASK
;
446 iowrite32(intrs
, pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
447 iowrite32(nmask
, pinstance
->int_regs
.global_interrupt_mask_reg
);
448 ioread32(pinstance
->int_regs
.global_interrupt_mask_reg
);
450 if (!pinstance
->interrupt_mode
) {
452 pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
453 ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
458 * pmcraid_enable_interrupts - Enables specified interrupts
460 * @pinstance: pointer to per adapter instance structure
461 * @intr: interrupts to enable
466 static void pmcraid_enable_interrupts(
467 struct pmcraid_instance
*pinstance
,
471 u32 gmask
= ioread32(pinstance
->int_regs
.global_interrupt_mask_reg
);
472 u32 nmask
= gmask
& (~GLOBAL_INTERRUPT_MASK
);
474 iowrite32(nmask
, pinstance
->int_regs
.global_interrupt_mask_reg
);
476 if (!pinstance
->interrupt_mode
) {
478 pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
479 ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
482 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
483 ioread32(pinstance
->int_regs
.global_interrupt_mask_reg
),
484 ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
));
488 * pmcraid_clr_trans_op - clear trans to op interrupt
490 * @pinstance: pointer to per adapter instance structure
495 static void pmcraid_clr_trans_op(
496 struct pmcraid_instance
*pinstance
499 unsigned long lock_flags
;
501 if (!pinstance
->interrupt_mode
) {
502 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL
,
503 pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
504 ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
505 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL
,
506 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
507 ioread32(pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
510 if (pinstance
->reset_cmd
!= NULL
) {
511 del_timer(&pinstance
->reset_cmd
->timer
);
513 pinstance
->host
->host_lock
, lock_flags
);
514 pinstance
->reset_cmd
->cmd_done(pinstance
->reset_cmd
);
515 spin_unlock_irqrestore(
516 pinstance
->host
->host_lock
, lock_flags
);
521 * pmcraid_reset_type - Determine the required reset type
522 * @pinstance: pointer to adapter instance structure
524 * IOA requires hard reset if any of the following conditions is true.
525 * 1. If HRRQ valid interrupt is not masked
526 * 2. IOA reset alert doorbell is set
527 * 3. If there are any error interrupts
529 static void pmcraid_reset_type(struct pmcraid_instance
*pinstance
)
535 mask
= ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
536 intrs
= ioread32(pinstance
->int_regs
.ioa_host_interrupt_reg
);
537 alerts
= ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
539 if ((mask
& INTRS_HRRQ_VALID
) == 0 ||
540 (alerts
& DOORBELL_IOA_RESET_ALERT
) ||
541 (intrs
& PMCRAID_ERROR_INTERRUPTS
)) {
542 pmcraid_info("IOA requires hard reset\n");
543 pinstance
->ioa_hard_reset
= 1;
546 /* If unit check is active, trigger the dump */
547 if (intrs
& INTRS_IOA_UNIT_CHECK
)
548 pinstance
->ioa_unit_check
= 1;
552 * pmcraid_bist_done - completion function for PCI BIST
553 * @cmd: pointer to reset command
558 static void pmcraid_ioa_reset(struct pmcraid_cmd
*);
560 static void pmcraid_bist_done(struct pmcraid_cmd
*cmd
)
562 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
563 unsigned long lock_flags
;
567 rc
= pci_read_config_word(pinstance
->pdev
, PCI_COMMAND
, &pci_reg
);
569 /* If PCI config space can't be accessed wait for another two secs */
570 if ((rc
!= PCIBIOS_SUCCESSFUL
|| (!(pci_reg
& PCI_COMMAND_MEMORY
))) &&
571 cmd
->time_left
> 0) {
572 pmcraid_info("BIST not complete, waiting another 2 secs\n");
573 cmd
->timer
.expires
= jiffies
+ cmd
->time_left
;
575 cmd
->timer
.data
= (unsigned long)cmd
;
576 cmd
->timer
.function
=
577 (void (*)(unsigned long))pmcraid_bist_done
;
578 add_timer(&cmd
->timer
);
581 pmcraid_info("BIST is complete, proceeding with reset\n");
582 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
583 pmcraid_ioa_reset(cmd
);
584 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
589 * pmcraid_start_bist - starts BIST
590 * @cmd: pointer to reset cmd
594 static void pmcraid_start_bist(struct pmcraid_cmd
*cmd
)
596 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
597 u32 doorbells
, intrs
;
599 /* proceed with bist and wait for 2 seconds */
600 iowrite32(DOORBELL_IOA_START_BIST
,
601 pinstance
->int_regs
.host_ioa_interrupt_reg
);
602 doorbells
= ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
603 intrs
= ioread32(pinstance
->int_regs
.ioa_host_interrupt_reg
);
604 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
607 cmd
->time_left
= msecs_to_jiffies(PMCRAID_BIST_TIMEOUT
);
608 cmd
->timer
.data
= (unsigned long)cmd
;
609 cmd
->timer
.expires
= jiffies
+ msecs_to_jiffies(PMCRAID_BIST_TIMEOUT
);
610 cmd
->timer
.function
= (void (*)(unsigned long))pmcraid_bist_done
;
611 add_timer(&cmd
->timer
);
615 * pmcraid_reset_alert_done - completion routine for reset_alert
616 * @cmd: pointer to command block used in reset sequence
620 static void pmcraid_reset_alert_done(struct pmcraid_cmd
*cmd
)
622 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
623 u32 status
= ioread32(pinstance
->ioa_status
);
624 unsigned long lock_flags
;
626 /* if the critical operation in progress bit is set or the wait times
627 * out, invoke reset engine to proceed with hard reset. If there is
628 * some more time to wait, restart the timer
630 if (((status
& INTRS_CRITICAL_OP_IN_PROGRESS
) == 0) ||
631 cmd
->time_left
<= 0) {
632 pmcraid_info("critical op is reset proceeding with reset\n");
633 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
634 pmcraid_ioa_reset(cmd
);
635 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
637 pmcraid_info("critical op is not yet reset waiting again\n");
638 /* restart timer if some more time is available to wait */
639 cmd
->time_left
-= PMCRAID_CHECK_FOR_RESET_TIMEOUT
;
640 cmd
->timer
.data
= (unsigned long)cmd
;
641 cmd
->timer
.expires
= jiffies
+ PMCRAID_CHECK_FOR_RESET_TIMEOUT
;
642 cmd
->timer
.function
=
643 (void (*)(unsigned long))pmcraid_reset_alert_done
;
644 add_timer(&cmd
->timer
);
649 * pmcraid_reset_alert - alerts IOA for a possible reset
650 * @cmd : command block to be used for reset sequence.
653 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
654 * successfully written to IOA. Returns non-zero in case pci_config_space
657 static void pmcraid_notify_ioastate(struct pmcraid_instance
*, u32
);
658 static void pmcraid_reset_alert(struct pmcraid_cmd
*cmd
)
660 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
665 /* If we are able to access IOA PCI config space, alert IOA that we are
666 * going to reset it soon. This enables IOA to preserv persistent error
667 * data if any. In case memory space is not accessible, proceed with
670 rc
= pci_read_config_word(pinstance
->pdev
, PCI_COMMAND
, &pci_reg
);
671 if ((rc
== PCIBIOS_SUCCESSFUL
) && (pci_reg
& PCI_COMMAND_MEMORY
)) {
673 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
674 * reset IOA doesn't generate any interrupts when CRITICAL
675 * OPERATION bit is reset. A timer is started to wait for this
678 cmd
->time_left
= PMCRAID_RESET_TIMEOUT
;
679 cmd
->timer
.data
= (unsigned long)cmd
;
680 cmd
->timer
.expires
= jiffies
+ PMCRAID_CHECK_FOR_RESET_TIMEOUT
;
681 cmd
->timer
.function
=
682 (void (*)(unsigned long))pmcraid_reset_alert_done
;
683 add_timer(&cmd
->timer
);
685 iowrite32(DOORBELL_IOA_RESET_ALERT
,
686 pinstance
->int_regs
.host_ioa_interrupt_reg
);
688 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
689 pmcraid_info("doorbells after reset alert: %x\n", doorbells
);
691 pmcraid_info("PCI config is not accessible starting BIST\n");
692 pinstance
->ioa_state
= IOA_STATE_IN_HARD_RESET
;
693 pmcraid_start_bist(cmd
);
698 * pmcraid_timeout_handler - Timeout handler for internally generated ops
700 * @cmd : pointer to command structure, that got timedout
702 * This function blocks host requests and initiates an adapter reset.
707 static void pmcraid_timeout_handler(struct pmcraid_cmd
*cmd
)
709 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
710 unsigned long lock_flags
;
712 dev_info(&pinstance
->pdev
->dev
,
713 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
714 cmd
->ioa_cb
->ioarcb
.cdb
[0]);
716 /* Command timeouts result in hard reset sequence. The command that got
717 * timed out may be the one used as part of reset sequence. In this
718 * case restart reset sequence using the same command block even if
719 * reset is in progress. Otherwise fail this command and get a free
720 * command block to restart the reset sequence.
722 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
723 if (!pinstance
->ioa_reset_in_progress
) {
724 pinstance
->ioa_reset_attempts
= 0;
725 cmd
= pmcraid_get_free_cmd(pinstance
);
727 /* If we are out of command blocks, just return here itself.
728 * Some other command's timeout handler can do the reset job
731 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
733 pmcraid_err("no free cmnd block for timeout handler\n");
737 pinstance
->reset_cmd
= cmd
;
738 pinstance
->ioa_reset_in_progress
= 1;
740 pmcraid_info("reset is already in progress\n");
742 if (pinstance
->reset_cmd
!= cmd
) {
743 /* This command should have been given to IOA, this
744 * command will be completed by fail_outstanding_cmds
747 pmcraid_err("cmd is pending but reset in progress\n");
750 /* If this command was being used as part of the reset
751 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
752 * causes fail_outstanding_commands not to return the command
753 * block back to free pool
755 if (cmd
== pinstance
->reset_cmd
)
756 cmd
->cmd_done
= pmcraid_ioa_reset
;
759 /* Notify apps of important IOA bringup/bringdown sequences */
760 if (pinstance
->scn
.ioa_state
!= PMC_DEVICE_EVENT_RESET_START
&&
761 pinstance
->scn
.ioa_state
!= PMC_DEVICE_EVENT_SHUTDOWN_START
)
762 pmcraid_notify_ioastate(pinstance
,
763 PMC_DEVICE_EVENT_RESET_START
);
765 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
766 scsi_block_requests(pinstance
->host
);
767 pmcraid_reset_alert(cmd
);
768 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
772 * pmcraid_internal_done - completion routine for internally generated cmds
774 * @cmd: command that got response from IOA
779 static void pmcraid_internal_done(struct pmcraid_cmd
*cmd
)
781 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
782 cmd
->ioa_cb
->ioarcb
.cdb
[0],
783 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
785 /* Some of the internal commands are sent with callers blocking for the
786 * response. Same will be indicated as part of cmd->completion_req
787 * field. Response path needs to wake up any waiters waiting for cmd
788 * completion if this flag is set.
790 if (cmd
->completion_req
) {
791 cmd
->completion_req
= 0;
792 complete(&cmd
->wait_for_completion
);
795 /* most of the internal commands are completed by caller itself, so
796 * no need to return the command block back to free pool until we are
797 * required to do so (e.g once done with initialization).
801 pmcraid_return_cmd(cmd
);
806 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
808 * @cmd: command that got response from IOA
810 * This routine is called after driver re-reads configuration table due to a
811 * lost CCN. It returns the command block back to free pool and schedules
812 * worker thread to add/delete devices into the system.
817 static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd
*cmd
)
819 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
820 cmd
->ioa_cb
->ioarcb
.cdb
[0],
821 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
825 pmcraid_return_cmd(cmd
);
827 pmcraid_info("scheduling worker for config table reinitialization\n");
828 schedule_work(&cmd
->drv_inst
->worker_q
);
832 * pmcraid_erp_done - Process completion of SCSI error response from device
833 * @cmd: pmcraid_command
835 * This function copies the sense buffer into the scsi_cmd struct and completes
836 * scsi_cmd by calling scsi_done function.
841 static void pmcraid_erp_done(struct pmcraid_cmd
*cmd
)
843 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
844 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
845 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
847 if (PMCRAID_IOASC_SENSE_KEY(ioasc
) > 0) {
848 scsi_cmd
->result
|= (DID_ERROR
<< 16);
849 scmd_printk(KERN_INFO
, scsi_cmd
,
850 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
851 cmd
->ioa_cb
->ioarcb
.cdb
[0], ioasc
);
854 /* if we had allocated sense buffers for request sense, copy the sense
855 * release the buffers
857 if (cmd
->sense_buffer
!= NULL
) {
858 memcpy(scsi_cmd
->sense_buffer
,
860 SCSI_SENSE_BUFFERSIZE
);
861 pci_free_consistent(pinstance
->pdev
,
862 SCSI_SENSE_BUFFERSIZE
,
863 cmd
->sense_buffer
, cmd
->sense_buffer_dma
);
864 cmd
->sense_buffer
= NULL
;
865 cmd
->sense_buffer_dma
= 0;
868 scsi_dma_unmap(scsi_cmd
);
869 pmcraid_return_cmd(cmd
);
870 scsi_cmd
->scsi_done(scsi_cmd
);
874 * pmcraid_fire_command - sends an IOA command to adapter
876 * This function adds the given block into pending command list
877 * and returns without waiting
879 * @cmd : command to be sent to the device
884 static void _pmcraid_fire_command(struct pmcraid_cmd
*cmd
)
886 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
887 unsigned long lock_flags
;
889 /* Add this command block to pending cmd pool. We do this prior to
890 * writting IOARCB to ioarrin because IOA might complete the command
891 * by the time we are about to add it to the list. Response handler
892 * (isr/tasklet) looks for cmd block in the pending pending list.
894 spin_lock_irqsave(&pinstance
->pending_pool_lock
, lock_flags
);
895 list_add_tail(&cmd
->free_list
, &pinstance
->pending_cmd_pool
);
896 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
, lock_flags
);
897 atomic_inc(&pinstance
->outstanding_cmds
);
899 /* driver writes lower 32-bit value of IOARCB address only */
901 iowrite32(le32_to_cpu(cmd
->ioa_cb
->ioarcb
.ioarcb_bus_addr
),
906 * pmcraid_send_cmd - fires a command to IOA
908 * This function also sets up timeout function, and command completion
911 * @cmd: pointer to the command block to be fired to IOA
912 * @cmd_done: command completion function, called once IOA responds
913 * @timeout: timeout to wait for this command completion
914 * @timeout_func: timeout handler
919 static void pmcraid_send_cmd(
920 struct pmcraid_cmd
*cmd
,
921 void (*cmd_done
) (struct pmcraid_cmd
*),
922 unsigned long timeout
,
923 void (*timeout_func
) (struct pmcraid_cmd
*)
926 /* initialize done function */
927 cmd
->cmd_done
= cmd_done
;
930 /* setup timeout handler */
931 cmd
->timer
.data
= (unsigned long)cmd
;
932 cmd
->timer
.expires
= jiffies
+ timeout
;
933 cmd
->timer
.function
= (void (*)(unsigned long))timeout_func
;
934 add_timer(&cmd
->timer
);
937 /* fire the command to IOA */
938 _pmcraid_fire_command(cmd
);
942 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
943 * @cmd: pointer to the command block used for sending IOA shutdown command
948 static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd
*cmd
)
950 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
951 unsigned long lock_flags
;
953 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
954 pmcraid_ioa_reset(cmd
);
955 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
959 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
961 * @cmd: pointer to the command block used as part of reset sequence
966 static void pmcraid_ioa_shutdown(struct pmcraid_cmd
*cmd
)
968 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
969 cmd
->ioa_cb
->ioarcb
.cdb
[0],
970 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
972 /* Note that commands sent during reset require next command to be sent
973 * to IOA. Hence reinit the done function as well as timeout function
975 pmcraid_reinit_cmdblk(cmd
);
976 cmd
->ioa_cb
->ioarcb
.request_type
= REQ_TYPE_IOACMD
;
977 cmd
->ioa_cb
->ioarcb
.resource_handle
=
978 cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
979 cmd
->ioa_cb
->ioarcb
.cdb
[0] = PMCRAID_IOA_SHUTDOWN
;
980 cmd
->ioa_cb
->ioarcb
.cdb
[1] = PMCRAID_SHUTDOWN_NORMAL
;
982 /* fire shutdown command to hardware. */
983 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
984 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
));
986 pmcraid_notify_ioastate(cmd
->drv_inst
, PMC_DEVICE_EVENT_SHUTDOWN_START
);
988 pmcraid_send_cmd(cmd
, pmcraid_ioa_shutdown_done
,
989 PMCRAID_SHUTDOWN_TIMEOUT
,
990 pmcraid_timeout_handler
);
994 * pmcraid_get_fwversion_done - completion function for get_fwversion
996 * @cmd: pointer to command block used to send INQUIRY command
1001 static void pmcraid_querycfg(struct pmcraid_cmd
*);
1003 static void pmcraid_get_fwversion_done(struct pmcraid_cmd
*cmd
)
1005 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1006 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
1007 unsigned long lock_flags
;
1009 /* configuration table entry size depends on firmware version. If fw
1010 * version is not known, it is not possible to interpret IOA config
1014 pmcraid_err("IOA Inquiry failed with %x\n", ioasc
);
1015 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
1016 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
1017 pmcraid_reset_alert(cmd
);
1018 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
1020 pmcraid_querycfg(cmd
);
1025 * pmcraid_get_fwversion - reads firmware version information
1027 * @cmd: pointer to command block used to send INQUIRY command
1032 static void pmcraid_get_fwversion(struct pmcraid_cmd
*cmd
)
1034 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1035 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
1036 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1037 u16 data_size
= sizeof(struct pmcraid_inquiry_data
);
1039 pmcraid_reinit_cmdblk(cmd
);
1040 ioarcb
->request_type
= REQ_TYPE_SCSI
;
1041 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1042 ioarcb
->cdb
[0] = INQUIRY
;
1044 ioarcb
->cdb
[2] = 0xD0;
1045 ioarcb
->cdb
[3] = (data_size
>> 8) & 0xFF;
1046 ioarcb
->cdb
[4] = data_size
& 0xFF;
1048 /* Since entire inquiry data it can be part of IOARCB itself
1050 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
1051 offsetof(struct pmcraid_ioarcb
,
1052 add_data
.u
.ioadl
[0]));
1053 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
1054 ioarcb
->ioarcb_bus_addr
&= ~(0x1FULL
);
1056 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
1057 ioarcb
->data_transfer_length
= cpu_to_le32(data_size
);
1058 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
1059 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
1060 ioadl
->address
= cpu_to_le64(pinstance
->inq_data_baddr
);
1061 ioadl
->data_len
= cpu_to_le32(data_size
);
1063 pmcraid_send_cmd(cmd
, pmcraid_get_fwversion_done
,
1064 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
1068 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1069 * @cmd: pointer to command block to be used for identify hrrq
1074 static void pmcraid_identify_hrrq(struct pmcraid_cmd
*cmd
)
1076 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1077 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1078 int index
= cmd
->hrrq_index
;
1079 __be64 hrrq_addr
= cpu_to_be64(pinstance
->hrrq_start_bus_addr
[index
]);
1080 u32 hrrq_size
= cpu_to_be32(sizeof(u32
) * PMCRAID_MAX_CMD
);
1081 void (*done_function
)(struct pmcraid_cmd
*);
1083 pmcraid_reinit_cmdblk(cmd
);
1084 cmd
->hrrq_index
= index
+ 1;
1086 if (cmd
->hrrq_index
< pinstance
->num_hrrq
) {
1087 done_function
= pmcraid_identify_hrrq
;
1089 cmd
->hrrq_index
= 0;
1090 done_function
= pmcraid_get_fwversion
;
1093 /* Initialize ioarcb */
1094 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
1095 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1097 /* initialize the hrrq number where IOA will respond to this command */
1098 ioarcb
->hrrq_id
= index
;
1099 ioarcb
->cdb
[0] = PMCRAID_IDENTIFY_HRRQ
;
1100 ioarcb
->cdb
[1] = index
;
1102 /* IOA expects 64-bit pci address to be written in B.E format
1103 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1105 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1106 hrrq_addr
, ioarcb
->ioarcb_bus_addr
, index
);
1108 memcpy(&(ioarcb
->cdb
[2]), &hrrq_addr
, sizeof(hrrq_addr
));
1109 memcpy(&(ioarcb
->cdb
[10]), &hrrq_size
, sizeof(hrrq_size
));
1111 /* Subsequent commands require HRRQ identification to be successful.
1112 * Note that this gets called even during reset from SCSI mid-layer
1115 pmcraid_send_cmd(cmd
, done_function
,
1116 PMCRAID_INTERNAL_TIMEOUT
,
1117 pmcraid_timeout_handler
);
1120 static void pmcraid_process_ccn(struct pmcraid_cmd
*cmd
);
1121 static void pmcraid_process_ldn(struct pmcraid_cmd
*cmd
);
1124 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1126 * @cmd: initialized command block pointer
1131 static void pmcraid_send_hcam_cmd(struct pmcraid_cmd
*cmd
)
1133 if (cmd
->ioa_cb
->ioarcb
.cdb
[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE
)
1134 atomic_set(&(cmd
->drv_inst
->ccn
.ignore
), 0);
1136 atomic_set(&(cmd
->drv_inst
->ldn
.ignore
), 0);
1138 pmcraid_send_cmd(cmd
, cmd
->cmd_done
, 0, NULL
);
1142 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1144 * @pinstance: pointer to adapter instance structure
1148 * pointer to initialized pmcraid_cmd structure or NULL
1150 static struct pmcraid_cmd
*pmcraid_init_hcam
1152 struct pmcraid_instance
*pinstance
,
1156 struct pmcraid_cmd
*cmd
;
1157 struct pmcraid_ioarcb
*ioarcb
;
1158 struct pmcraid_ioadl_desc
*ioadl
;
1159 struct pmcraid_hostrcb
*hcam
;
1160 void (*cmd_done
) (struct pmcraid_cmd
*);
1164 cmd
= pmcraid_get_free_cmd(pinstance
);
1167 pmcraid_err("no free command blocks for hcam\n");
1171 if (type
== PMCRAID_HCAM_CODE_CONFIG_CHANGE
) {
1172 rcb_size
= sizeof(struct pmcraid_hcam_ccn_ext
);
1173 cmd_done
= pmcraid_process_ccn
;
1174 dma
= pinstance
->ccn
.baddr
+ PMCRAID_AEN_HDR_SIZE
;
1175 hcam
= &pinstance
->ccn
;
1177 rcb_size
= sizeof(struct pmcraid_hcam_ldn
);
1178 cmd_done
= pmcraid_process_ldn
;
1179 dma
= pinstance
->ldn
.baddr
+ PMCRAID_AEN_HDR_SIZE
;
1180 hcam
= &pinstance
->ldn
;
1183 /* initialize command pointer used for HCAM registration */
1186 ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1187 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
1188 offsetof(struct pmcraid_ioarcb
,
1189 add_data
.u
.ioadl
[0]));
1190 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
1191 ioadl
= ioarcb
->add_data
.u
.ioadl
;
1193 /* Initialize ioarcb */
1194 ioarcb
->request_type
= REQ_TYPE_HCAM
;
1195 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1196 ioarcb
->cdb
[0] = PMCRAID_HOST_CONTROLLED_ASYNC
;
1197 ioarcb
->cdb
[1] = type
;
1198 ioarcb
->cdb
[7] = (rcb_size
>> 8) & 0xFF;
1199 ioarcb
->cdb
[8] = (rcb_size
) & 0xFF;
1201 ioarcb
->data_transfer_length
= cpu_to_le32(rcb_size
);
1203 ioadl
[0].flags
|= IOADL_FLAGS_READ_LAST
;
1204 ioadl
[0].data_len
= cpu_to_le32(rcb_size
);
1205 ioadl
[0].address
= cpu_to_le32(dma
);
1207 cmd
->cmd_done
= cmd_done
;
1212 * pmcraid_send_hcam - Send an HCAM to IOA
1213 * @pinstance: ioa config struct
1216 * This function will send a Host Controlled Async command to IOA.
1221 static void pmcraid_send_hcam(struct pmcraid_instance
*pinstance
, u8 type
)
1223 struct pmcraid_cmd
*cmd
= pmcraid_init_hcam(pinstance
, type
);
1224 pmcraid_send_hcam_cmd(cmd
);
1229 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1231 * @cmd: pointer to cmd that is used as cancelling command
1232 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1234 static void pmcraid_prepare_cancel_cmd(
1235 struct pmcraid_cmd
*cmd
,
1236 struct pmcraid_cmd
*cmd_to_cancel
1239 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1240 __be64 ioarcb_addr
= cmd_to_cancel
->ioa_cb
->ioarcb
.ioarcb_bus_addr
;
1242 /* Get the resource handle to where the command to be aborted has been
1245 ioarcb
->resource_handle
= cmd_to_cancel
->ioa_cb
->ioarcb
.resource_handle
;
1246 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
1247 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
1248 ioarcb
->cdb
[0] = PMCRAID_ABORT_CMD
;
1250 /* IOARCB address of the command to be cancelled is given in
1251 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1252 * IOARCB address are not masked.
1254 ioarcb_addr
= cpu_to_be64(ioarcb_addr
);
1255 memcpy(&(ioarcb
->cdb
[2]), &ioarcb_addr
, sizeof(ioarcb_addr
));
1259 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1261 * @cmd: command to be used as cancelling command
1263 * @cmd_done: op done function for the cancelling command
1265 static void pmcraid_cancel_hcam(
1266 struct pmcraid_cmd
*cmd
,
1268 void (*cmd_done
) (struct pmcraid_cmd
*)
1271 struct pmcraid_instance
*pinstance
;
1272 struct pmcraid_hostrcb
*hcam
;
1274 pinstance
= cmd
->drv_inst
;
1275 hcam
= (type
== PMCRAID_HCAM_CODE_LOG_DATA
) ?
1276 &pinstance
->ldn
: &pinstance
->ccn
;
1278 /* prepare for cancelling previous hcam command. If the HCAM is
1279 * currently not pending with IOA, we would have hcam->cmd as non-null
1281 if (hcam
->cmd
== NULL
)
1284 pmcraid_prepare_cancel_cmd(cmd
, hcam
->cmd
);
1286 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1287 * schedule queuecommand while we are doing this
1289 pmcraid_send_cmd(cmd
, cmd_done
,
1290 PMCRAID_INTERNAL_TIMEOUT
,
1291 pmcraid_timeout_handler
);
1295 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1297 * @cmd: command block to be used for cancelling the HCAM
1299 static void pmcraid_cancel_ccn(struct pmcraid_cmd
*cmd
)
1301 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1302 cmd
->ioa_cb
->ioarcb
.cdb
[0],
1303 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
1305 pmcraid_reinit_cmdblk(cmd
);
1307 pmcraid_cancel_hcam(cmd
,
1308 PMCRAID_HCAM_CODE_CONFIG_CHANGE
,
1309 pmcraid_ioa_shutdown
);
1313 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1315 * @cmd: command block to be used for cancelling the HCAM
1317 static void pmcraid_cancel_ldn(struct pmcraid_cmd
*cmd
)
1319 pmcraid_cancel_hcam(cmd
,
1320 PMCRAID_HCAM_CODE_LOG_DATA
,
1321 pmcraid_cancel_ccn
);
1325 * pmcraid_expose_resource - check if the resource can be exposed to OS
1327 * @fw_version: firmware version code
1328 * @cfgte: pointer to configuration table entry of the resource
1331 * true if resource can be added to midlayer, false(0) otherwise
1333 static int pmcraid_expose_resource(u16 fw_version
,
1334 struct pmcraid_config_table_entry
*cfgte
)
1338 if (cfgte
->resource_type
== RES_TYPE_VSET
) {
1339 if (fw_version
<= PMCRAID_FW_VERSION_1
)
1340 retval
= ((cfgte
->unique_flags1
& 0x80) == 0);
1342 retval
= ((cfgte
->unique_flags0
& 0x80) == 0 &&
1343 (cfgte
->unique_flags1
& 0x80) == 0);
1345 } else if (cfgte
->resource_type
== RES_TYPE_GSCSI
)
1346 retval
= (RES_BUS(cfgte
->resource_address
) !=
1347 PMCRAID_VIRTUAL_ENCL_BUS_ID
);
1351 /* attributes supported by pmcraid_event_family */
1353 PMCRAID_AEN_ATTR_UNSPEC
,
1354 PMCRAID_AEN_ATTR_EVENT
,
1355 __PMCRAID_AEN_ATTR_MAX
,
1357 #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1359 /* commands supported by pmcraid_event_family */
1361 PMCRAID_AEN_CMD_UNSPEC
,
1362 PMCRAID_AEN_CMD_EVENT
,
1363 __PMCRAID_AEN_CMD_MAX
,
1365 #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1367 static struct genl_multicast_group pmcraid_mcgrps
[] = {
1368 { .name
= "events", /* not really used - see ID discussion below */ },
1371 static struct genl_family pmcraid_event_family __ro_after_init
= {
1372 .module
= THIS_MODULE
,
1375 .maxattr
= PMCRAID_AEN_ATTR_MAX
,
1376 .mcgrps
= pmcraid_mcgrps
,
1377 .n_mcgrps
= ARRAY_SIZE(pmcraid_mcgrps
),
1381 * pmcraid_netlink_init - registers pmcraid_event_family
1384 * 0 if the pmcraid_event_family is successfully registered
1385 * with netlink generic, non-zero otherwise
1387 static int __init
pmcraid_netlink_init(void)
1391 result
= genl_register_family(&pmcraid_event_family
);
1396 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1397 pmcraid_event_family
.id
);
1403 * pmcraid_netlink_release - unregisters pmcraid_event_family
1408 static void pmcraid_netlink_release(void)
1410 genl_unregister_family(&pmcraid_event_family
);
1414 * pmcraid_notify_aen - sends event msg to user space application
1415 * @pinstance: pointer to adapter instance structure
1419 * 0 if success, error value in case of any failure.
1421 static int pmcraid_notify_aen(
1422 struct pmcraid_instance
*pinstance
,
1423 struct pmcraid_aen_msg
*aen_msg
,
1427 struct sk_buff
*skb
;
1429 u32 total_size
, nla_genl_hdr_total_size
;
1432 aen_msg
->hostno
= (pinstance
->host
->unique_id
<< 16 |
1433 MINOR(pinstance
->cdev
.dev
));
1434 aen_msg
->length
= data_size
;
1436 data_size
+= sizeof(*aen_msg
);
1438 total_size
= nla_total_size(data_size
);
1439 /* Add GENL_HDR to total_size */
1440 nla_genl_hdr_total_size
=
1441 (total_size
+ (GENL_HDRLEN
+
1442 ((struct genl_family
*)&pmcraid_event_family
)->hdrsize
)
1444 skb
= genlmsg_new(nla_genl_hdr_total_size
, GFP_ATOMIC
);
1448 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1453 /* add the genetlink message header */
1454 msg_header
= genlmsg_put(skb
, 0, 0,
1455 &pmcraid_event_family
, 0,
1456 PMCRAID_AEN_CMD_EVENT
);
1458 pmcraid_err("failed to copy command details\n");
1463 result
= nla_put(skb
, PMCRAID_AEN_ATTR_EVENT
, data_size
, aen_msg
);
1466 pmcraid_err("failed to copy AEN attribute data\n");
1471 /* send genetlink multicast message to notify appplications */
1472 genlmsg_end(skb
, msg_header
);
1474 result
= genlmsg_multicast(&pmcraid_event_family
, skb
,
1477 /* If there are no listeners, genlmsg_multicast may return non-zero
1481 pmcraid_info("error (%x) sending aen event message\n", result
);
1486 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1487 * @pinstance: pointer adapter instance structure
1490 * 0 if success, error value in case of any failure
1492 static int pmcraid_notify_ccn(struct pmcraid_instance
*pinstance
)
1494 return pmcraid_notify_aen(pinstance
,
1496 pinstance
->ccn
.hcam
->data_len
+
1497 sizeof(struct pmcraid_hcam_hdr
));
1501 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1502 * @pinstance: pointer adapter instance structure
1505 * 0 if success, error value in case of any failure
1507 static int pmcraid_notify_ldn(struct pmcraid_instance
*pinstance
)
1509 return pmcraid_notify_aen(pinstance
,
1511 pinstance
->ldn
.hcam
->data_len
+
1512 sizeof(struct pmcraid_hcam_hdr
));
1516 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1517 * @pinstance: pointer adapter instance structure
1518 * @evt: controller state event to be sent
1521 * 0 if success, error value in case of any failure
1523 static void pmcraid_notify_ioastate(struct pmcraid_instance
*pinstance
, u32 evt
)
1525 pinstance
->scn
.ioa_state
= evt
;
1526 pmcraid_notify_aen(pinstance
,
1527 &pinstance
->scn
.msg
,
1532 * pmcraid_handle_config_change - Handle a config change from the adapter
1533 * @pinstance: pointer to per adapter instance structure
1539 static void pmcraid_handle_config_change(struct pmcraid_instance
*pinstance
)
1541 struct pmcraid_config_table_entry
*cfg_entry
;
1542 struct pmcraid_hcam_ccn
*ccn_hcam
;
1543 struct pmcraid_cmd
*cmd
;
1544 struct pmcraid_cmd
*cfgcmd
;
1545 struct pmcraid_resource_entry
*res
= NULL
;
1546 unsigned long lock_flags
;
1547 unsigned long host_lock_flags
;
1549 u32 hidden_entry
= 0;
1553 ccn_hcam
= (struct pmcraid_hcam_ccn
*)pinstance
->ccn
.hcam
;
1554 cfg_entry
= &ccn_hcam
->cfg_entry
;
1555 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
1557 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1558 res: %x:%x:%x:%x\n",
1559 pinstance
->ccn
.hcam
->ilid
,
1560 pinstance
->ccn
.hcam
->op_code
,
1561 ((pinstance
->ccn
.hcam
->timestamp1
) |
1562 ((pinstance
->ccn
.hcam
->timestamp2
& 0xffffffffLL
) << 32)),
1563 pinstance
->ccn
.hcam
->notification_type
,
1564 pinstance
->ccn
.hcam
->notification_lost
,
1565 pinstance
->ccn
.hcam
->flags
,
1566 pinstance
->host
->unique_id
,
1567 RES_IS_VSET(*cfg_entry
) ? PMCRAID_VSET_BUS_ID
:
1568 (RES_IS_GSCSI(*cfg_entry
) ? PMCRAID_PHYS_BUS_ID
:
1569 RES_BUS(cfg_entry
->resource_address
)),
1570 RES_IS_VSET(*cfg_entry
) ?
1571 (fw_version
<= PMCRAID_FW_VERSION_1
?
1572 cfg_entry
->unique_flags1
:
1573 cfg_entry
->array_id
& 0xFF) :
1574 RES_TARGET(cfg_entry
->resource_address
),
1575 RES_LUN(cfg_entry
->resource_address
));
1578 /* If this HCAM indicates a lost notification, read the config table */
1579 if (pinstance
->ccn
.hcam
->notification_lost
) {
1580 cfgcmd
= pmcraid_get_free_cmd(pinstance
);
1582 pmcraid_info("lost CCN, reading config table\b");
1583 pinstance
->reinit_cfg_table
= 1;
1584 pmcraid_querycfg(cfgcmd
);
1586 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1588 goto out_notify_apps
;
1591 /* If this resource is not going to be added to mid-layer, just notify
1592 * applications and return. If this notification is about hiding a VSET
1593 * resource, check if it was exposed already.
1595 if (pinstance
->ccn
.hcam
->notification_type
==
1596 NOTIFICATION_TYPE_ENTRY_CHANGED
&&
1597 cfg_entry
->resource_type
== RES_TYPE_VSET
) {
1599 if (fw_version
<= PMCRAID_FW_VERSION_1
)
1600 hidden_entry
= (cfg_entry
->unique_flags1
& 0x80) != 0;
1602 hidden_entry
= (cfg_entry
->unique_flags1
& 0x80) != 0;
1604 } else if (!pmcraid_expose_resource(fw_version
, cfg_entry
)) {
1605 goto out_notify_apps
;
1608 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
1609 list_for_each_entry(res
, &pinstance
->used_res_q
, queue
) {
1610 rc
= memcmp(&res
->cfg_entry
.resource_address
,
1611 &cfg_entry
->resource_address
,
1612 sizeof(cfg_entry
->resource_address
));
1622 spin_unlock_irqrestore(&pinstance
->resource_lock
,
1624 goto out_notify_apps
;
1627 /* If there are more number of resources than what driver can
1628 * manage, do not notify the applications about the CCN. Just
1629 * ignore this notifications and re-register the same HCAM
1631 if (list_empty(&pinstance
->free_res_q
)) {
1632 spin_unlock_irqrestore(&pinstance
->resource_lock
,
1634 pmcraid_err("too many resources attached\n");
1635 spin_lock_irqsave(pinstance
->host
->host_lock
,
1637 pmcraid_send_hcam(pinstance
,
1638 PMCRAID_HCAM_CODE_CONFIG_CHANGE
);
1639 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
1644 res
= list_entry(pinstance
->free_res_q
.next
,
1645 struct pmcraid_resource_entry
, queue
);
1647 list_del(&res
->queue
);
1648 res
->scsi_dev
= NULL
;
1649 res
->reset_progress
= 0;
1650 list_add_tail(&res
->queue
, &pinstance
->used_res_q
);
1653 memcpy(&res
->cfg_entry
, cfg_entry
, pinstance
->config_table_entry_size
);
1655 if (pinstance
->ccn
.hcam
->notification_type
==
1656 NOTIFICATION_TYPE_ENTRY_DELETED
|| hidden_entry
) {
1657 if (res
->scsi_dev
) {
1658 if (fw_version
<= PMCRAID_FW_VERSION_1
)
1659 res
->cfg_entry
.unique_flags1
&= 0x7F;
1661 res
->cfg_entry
.array_id
&= 0xFF;
1662 res
->change_detected
= RES_CHANGE_DEL
;
1663 res
->cfg_entry
.resource_handle
=
1664 PMCRAID_INVALID_RES_HANDLE
;
1665 schedule_work(&pinstance
->worker_q
);
1667 /* This may be one of the non-exposed resources */
1668 list_move_tail(&res
->queue
, &pinstance
->free_res_q
);
1670 } else if (!res
->scsi_dev
) {
1671 res
->change_detected
= RES_CHANGE_ADD
;
1672 schedule_work(&pinstance
->worker_q
);
1674 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
1678 /* Notify configuration changes to registered applications.*/
1679 if (!pmcraid_disable_aen
)
1680 pmcraid_notify_ccn(pinstance
);
1682 cmd
= pmcraid_init_hcam(pinstance
, PMCRAID_HCAM_CODE_CONFIG_CHANGE
);
1684 pmcraid_send_hcam_cmd(cmd
);
1688 * pmcraid_get_error_info - return error string for an ioasc
1689 * @ioasc: ioasc code
1693 static struct pmcraid_ioasc_error
*pmcraid_get_error_info(u32 ioasc
)
1696 for (i
= 0; i
< ARRAY_SIZE(pmcraid_ioasc_error_table
); i
++) {
1697 if (pmcraid_ioasc_error_table
[i
].ioasc_code
== ioasc
)
1698 return &pmcraid_ioasc_error_table
[i
];
1704 * pmcraid_ioasc_logger - log IOASC information based user-settings
1705 * @ioasc: ioasc code
1706 * @cmd: pointer to command that resulted in 'ioasc'
1708 static void pmcraid_ioasc_logger(u32 ioasc
, struct pmcraid_cmd
*cmd
)
1710 struct pmcraid_ioasc_error
*error_info
= pmcraid_get_error_info(ioasc
);
1712 if (error_info
== NULL
||
1713 cmd
->drv_inst
->current_log_level
< error_info
->log_level
)
1716 /* log the error string */
1717 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1718 cmd
->ioa_cb
->ioarcb
.cdb
[0],
1719 cmd
->ioa_cb
->ioarcb
.resource_handle
,
1720 le32_to_cpu(ioasc
), error_info
->error_string
);
1724 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1726 * @pinstance: pointer to per adapter instance structure
1731 static void pmcraid_handle_error_log(struct pmcraid_instance
*pinstance
)
1733 struct pmcraid_hcam_ldn
*hcam_ldn
;
1736 hcam_ldn
= (struct pmcraid_hcam_ldn
*)pinstance
->ldn
.hcam
;
1739 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1740 pinstance
->ldn
.hcam
->ilid
,
1741 pinstance
->ldn
.hcam
->op_code
,
1742 pinstance
->ldn
.hcam
->notification_type
,
1743 pinstance
->ldn
.hcam
->notification_lost
,
1744 pinstance
->ldn
.hcam
->flags
,
1745 pinstance
->ldn
.hcam
->overlay_id
);
1747 /* log only the errors, no need to log informational log entries */
1748 if (pinstance
->ldn
.hcam
->notification_type
!=
1749 NOTIFICATION_TYPE_ERROR_LOG
)
1752 if (pinstance
->ldn
.hcam
->notification_lost
==
1753 HOSTRCB_NOTIFICATIONS_LOST
)
1754 dev_info(&pinstance
->pdev
->dev
, "Error notifications lost\n");
1756 ioasc
= le32_to_cpu(hcam_ldn
->error_log
.fd_ioasc
);
1758 if (ioasc
== PMCRAID_IOASC_UA_BUS_WAS_RESET
||
1759 ioasc
== PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER
) {
1760 dev_info(&pinstance
->pdev
->dev
,
1761 "UnitAttention due to IOA Bus Reset\n");
1762 scsi_report_bus_reset(
1764 RES_BUS(hcam_ldn
->error_log
.fd_ra
));
1771 * pmcraid_process_ccn - Op done function for a CCN.
1772 * @cmd: pointer to command struct
1774 * This function is the op done function for a configuration
1775 * change notification
1780 static void pmcraid_process_ccn(struct pmcraid_cmd
*cmd
)
1782 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1783 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
1784 unsigned long lock_flags
;
1786 pinstance
->ccn
.cmd
= NULL
;
1787 pmcraid_return_cmd(cmd
);
1789 /* If driver initiated IOA reset happened while this hcam was pending
1790 * with IOA, or IOA bringdown sequence is in progress, no need to
1791 * re-register the hcam
1793 if (ioasc
== PMCRAID_IOASC_IOA_WAS_RESET
||
1794 atomic_read(&pinstance
->ccn
.ignore
) == 1) {
1797 dev_info(&pinstance
->pdev
->dev
,
1798 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc
);
1799 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
1800 pmcraid_send_hcam(pinstance
, PMCRAID_HCAM_CODE_CONFIG_CHANGE
);
1801 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
1803 pmcraid_handle_config_change(pinstance
);
1808 * pmcraid_process_ldn - op done function for an LDN
1809 * @cmd: pointer to command block
1814 static void pmcraid_initiate_reset(struct pmcraid_instance
*);
1815 static void pmcraid_set_timestamp(struct pmcraid_cmd
*cmd
);
1817 static void pmcraid_process_ldn(struct pmcraid_cmd
*cmd
)
1819 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1820 struct pmcraid_hcam_ldn
*ldn_hcam
=
1821 (struct pmcraid_hcam_ldn
*)pinstance
->ldn
.hcam
;
1822 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
1823 u32 fd_ioasc
= le32_to_cpu(ldn_hcam
->error_log
.fd_ioasc
);
1824 unsigned long lock_flags
;
1826 /* return the command block back to freepool */
1827 pinstance
->ldn
.cmd
= NULL
;
1828 pmcraid_return_cmd(cmd
);
1830 /* If driver initiated IOA reset happened while this hcam was pending
1831 * with IOA, no need to re-register the hcam as reset engine will do it
1832 * once reset sequence is complete
1834 if (ioasc
== PMCRAID_IOASC_IOA_WAS_RESET
||
1835 atomic_read(&pinstance
->ccn
.ignore
) == 1) {
1837 } else if (!ioasc
) {
1838 pmcraid_handle_error_log(pinstance
);
1839 if (fd_ioasc
== PMCRAID_IOASC_NR_IOA_RESET_REQUIRED
) {
1840 spin_lock_irqsave(pinstance
->host
->host_lock
,
1842 pmcraid_initiate_reset(pinstance
);
1843 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
1847 if (fd_ioasc
== PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC
) {
1848 pinstance
->timestamp_error
= 1;
1849 pmcraid_set_timestamp(cmd
);
1852 dev_info(&pinstance
->pdev
->dev
,
1853 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc
);
1855 /* send netlink message for HCAM notification if enabled */
1856 if (!pmcraid_disable_aen
)
1857 pmcraid_notify_ldn(pinstance
);
1859 cmd
= pmcraid_init_hcam(pinstance
, PMCRAID_HCAM_CODE_LOG_DATA
);
1861 pmcraid_send_hcam_cmd(cmd
);
1865 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1867 * @pinstance: pointer per adapter instance structure
1872 static void pmcraid_register_hcams(struct pmcraid_instance
*pinstance
)
1874 pmcraid_send_hcam(pinstance
, PMCRAID_HCAM_CODE_CONFIG_CHANGE
);
1875 pmcraid_send_hcam(pinstance
, PMCRAID_HCAM_CODE_LOG_DATA
);
1879 * pmcraid_unregister_hcams - cancel HCAMs registered already
1880 * @cmd: pointer to command used as part of reset sequence
1882 static void pmcraid_unregister_hcams(struct pmcraid_cmd
*cmd
)
1884 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1886 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1887 * handling hcam response though it is not necessary. In order to
1888 * prevent this, set 'ignore', so that bring-down sequence doesn't
1889 * re-send any more hcams
1891 atomic_set(&pinstance
->ccn
.ignore
, 1);
1892 atomic_set(&pinstance
->ldn
.ignore
, 1);
1894 /* If adapter reset was forced as part of runtime reset sequence,
1895 * start the reset sequence. Reset will be triggered even in case
1898 if ((pinstance
->force_ioa_reset
&& !pinstance
->ioa_bringdown
) ||
1899 pinstance
->ioa_unit_check
) {
1900 pinstance
->force_ioa_reset
= 0;
1901 pinstance
->ioa_unit_check
= 0;
1902 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
1903 pmcraid_reset_alert(cmd
);
1907 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1908 * one after the other. So CCN cancellation will be triggered by
1909 * pmcraid_cancel_ldn itself.
1911 pmcraid_cancel_ldn(cmd
);
1915 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1916 * @pinstance: pointer to adapter instance structure
1918 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1920 static void pmcraid_reinit_buffers(struct pmcraid_instance
*);
1922 static int pmcraid_reset_enable_ioa(struct pmcraid_instance
*pinstance
)
1926 pmcraid_reinit_buffers(pinstance
);
1927 intrs
= pmcraid_read_interrupts(pinstance
);
1929 pmcraid_enable_interrupts(pinstance
, PMCRAID_PCI_INTERRUPTS
);
1931 if (intrs
& INTRS_TRANSITION_TO_OPERATIONAL
) {
1932 if (!pinstance
->interrupt_mode
) {
1933 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL
,
1934 pinstance
->int_regs
.
1935 ioa_host_interrupt_mask_reg
);
1936 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL
,
1937 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
1946 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1947 * @cmd : pointer to reset command block
1952 static void pmcraid_soft_reset(struct pmcraid_cmd
*cmd
)
1954 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1958 /* There will be an interrupt when Transition to Operational bit is
1959 * set so tasklet would execute next reset task. The timeout handler
1960 * would re-initiate a reset
1962 cmd
->cmd_done
= pmcraid_ioa_reset
;
1963 cmd
->timer
.data
= (unsigned long)cmd
;
1964 cmd
->timer
.expires
= jiffies
+
1965 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT
);
1966 cmd
->timer
.function
= (void (*)(unsigned long))pmcraid_timeout_handler
;
1968 if (!timer_pending(&cmd
->timer
))
1969 add_timer(&cmd
->timer
);
1971 /* Enable destructive diagnostics on IOA if it is not yet in
1974 doorbell
= DOORBELL_RUNTIME_RESET
|
1975 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS
;
1977 /* Since we do RESET_ALERT and Start BIST we have to again write
1978 * MSIX Doorbell to indicate the interrupt mode
1980 if (pinstance
->interrupt_mode
) {
1981 iowrite32(DOORBELL_INTR_MODE_MSIX
,
1982 pinstance
->int_regs
.host_ioa_interrupt_reg
);
1983 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
1986 iowrite32(doorbell
, pinstance
->int_regs
.host_ioa_interrupt_reg
);
1987 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
),
1988 int_reg
= ioread32(pinstance
->int_regs
.ioa_host_interrupt_reg
);
1990 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
1991 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
),
1996 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
1998 * @pinstance: pointer to adapter instance structure
2003 static void pmcraid_get_dump(struct pmcraid_instance
*pinstance
)
2005 pmcraid_info("%s is not yet implemented\n", __func__
);
2009 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2010 * @pinstance: pointer to adapter instance structure
2012 * This function fails all outstanding ops. If they are submitted to IOA
2013 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2014 * otherwise just completes the commands and returns the cmd blocks to free
2020 static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance
*pinstance
)
2022 struct pmcraid_cmd
*cmd
, *temp
;
2023 unsigned long lock_flags
;
2025 /* pending command list is protected by pending_pool_lock. Its
2026 * traversal must be done as within this lock
2028 spin_lock_irqsave(&pinstance
->pending_pool_lock
, lock_flags
);
2029 list_for_each_entry_safe(cmd
, temp
, &pinstance
->pending_cmd_pool
,
2031 list_del(&cmd
->free_list
);
2032 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
,
2034 cmd
->ioa_cb
->ioasa
.ioasc
=
2035 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET
);
2036 cmd
->ioa_cb
->ioasa
.ilid
=
2037 cpu_to_be32(PMCRAID_DRIVER_ILID
);
2039 /* In case the command timer is still running */
2040 del_timer(&cmd
->timer
);
2042 /* If this is an IO command, complete it by invoking scsi_done
2043 * function. If this is one of the internal commands other
2044 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2047 if (cmd
->scsi_cmd
) {
2049 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2050 __le32 resp
= cmd
->ioa_cb
->ioarcb
.response_handle
;
2052 scsi_cmd
->result
|= DID_ERROR
<< 16;
2054 scsi_dma_unmap(scsi_cmd
);
2055 pmcraid_return_cmd(cmd
);
2057 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2058 le32_to_cpu(resp
) >> 2,
2059 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2061 scsi_cmd
->scsi_done(scsi_cmd
);
2062 } else if (cmd
->cmd_done
== pmcraid_internal_done
||
2063 cmd
->cmd_done
== pmcraid_erp_done
) {
2065 } else if (cmd
->cmd_done
!= pmcraid_ioa_reset
&&
2066 cmd
->cmd_done
!= pmcraid_ioa_shutdown_done
) {
2067 pmcraid_return_cmd(cmd
);
2070 atomic_dec(&pinstance
->outstanding_cmds
);
2071 spin_lock_irqsave(&pinstance
->pending_pool_lock
, lock_flags
);
2074 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
, lock_flags
);
2078 * pmcraid_ioa_reset - Implementation of IOA reset logic
2080 * @cmd: pointer to the cmd block to be used for entire reset process
2082 * This function executes most of the steps required for IOA reset. This gets
2083 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2084 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2085 * synchronized using host lock. Various functions called during reset process
2086 * would make use of a single command block, pointer to which is also stored in
2087 * adapter instance structure.
2092 static void pmcraid_ioa_reset(struct pmcraid_cmd
*cmd
)
2094 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
2095 u8 reset_complete
= 0;
2097 pinstance
->ioa_reset_in_progress
= 1;
2099 if (pinstance
->reset_cmd
!= cmd
) {
2100 pmcraid_err("reset is called with different command block\n");
2101 pinstance
->reset_cmd
= cmd
;
2104 pmcraid_info("reset_engine: state = %d, command = %p\n",
2105 pinstance
->ioa_state
, cmd
);
2107 switch (pinstance
->ioa_state
) {
2109 case IOA_STATE_DEAD
:
2110 /* If IOA is offline, whatever may be the reset reason, just
2111 * return. callers might be waiting on the reset wait_q, wake
2114 pmcraid_err("IOA is offline no reset is possible\n");
2118 case IOA_STATE_IN_BRINGDOWN
:
2119 /* we enter here, once ioa shutdown command is processed by IOA
2120 * Alert IOA for a possible reset. If reset alert fails, IOA
2121 * goes through hard-reset
2123 pmcraid_disable_interrupts(pinstance
, ~0);
2124 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
2125 pmcraid_reset_alert(cmd
);
2128 case IOA_STATE_UNKNOWN
:
2129 /* We may be called during probe or resume. Some pre-processing
2130 * is required for prior to reset
2132 scsi_block_requests(pinstance
->host
);
2134 /* If asked to reset while IOA was processing responses or
2135 * there are any error responses then IOA may require
2138 if (pinstance
->ioa_hard_reset
== 0) {
2139 if (ioread32(pinstance
->ioa_status
) &
2140 INTRS_TRANSITION_TO_OPERATIONAL
) {
2141 pmcraid_info("sticky bit set, bring-up\n");
2142 pinstance
->ioa_state
= IOA_STATE_IN_BRINGUP
;
2143 pmcraid_reinit_cmdblk(cmd
);
2144 pmcraid_identify_hrrq(cmd
);
2146 pinstance
->ioa_state
= IOA_STATE_IN_SOFT_RESET
;
2147 pmcraid_soft_reset(cmd
);
2150 /* Alert IOA of a possible reset and wait for critical
2151 * operation in progress bit to reset
2153 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
2154 pmcraid_reset_alert(cmd
);
2158 case IOA_STATE_IN_RESET_ALERT
:
2159 /* If critical operation in progress bit is reset or wait gets
2160 * timed out, reset proceeds with starting BIST on the IOA.
2161 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2162 * they are 3 or more, reset engine marks IOA dead and returns
2164 pinstance
->ioa_state
= IOA_STATE_IN_HARD_RESET
;
2165 pmcraid_start_bist(cmd
);
2168 case IOA_STATE_IN_HARD_RESET
:
2169 pinstance
->ioa_reset_attempts
++;
2171 /* retry reset if we haven't reached maximum allowed limit */
2172 if (pinstance
->ioa_reset_attempts
> PMCRAID_RESET_ATTEMPTS
) {
2173 pinstance
->ioa_reset_attempts
= 0;
2174 pmcraid_err("IOA didn't respond marking it as dead\n");
2175 pinstance
->ioa_state
= IOA_STATE_DEAD
;
2177 if (pinstance
->ioa_bringdown
)
2178 pmcraid_notify_ioastate(pinstance
,
2179 PMC_DEVICE_EVENT_SHUTDOWN_FAILED
);
2181 pmcraid_notify_ioastate(pinstance
,
2182 PMC_DEVICE_EVENT_RESET_FAILED
);
2187 /* Once either bist or pci reset is done, restore PCI config
2188 * space. If this fails, proceed with hard reset again
2190 pci_restore_state(pinstance
->pdev
);
2192 /* fail all pending commands */
2193 pmcraid_fail_outstanding_cmds(pinstance
);
2195 /* check if unit check is active, if so extract dump */
2196 if (pinstance
->ioa_unit_check
) {
2197 pmcraid_info("unit check is active\n");
2198 pinstance
->ioa_unit_check
= 0;
2199 pmcraid_get_dump(pinstance
);
2200 pinstance
->ioa_reset_attempts
--;
2201 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
2202 pmcraid_reset_alert(cmd
);
2206 /* if the reset reason is to bring-down the ioa, we might be
2207 * done with the reset restore pci_config_space and complete
2210 if (pinstance
->ioa_bringdown
) {
2211 pmcraid_info("bringing down the adapter\n");
2212 pinstance
->ioa_shutdown_type
= SHUTDOWN_NONE
;
2213 pinstance
->ioa_bringdown
= 0;
2214 pinstance
->ioa_state
= IOA_STATE_UNKNOWN
;
2215 pmcraid_notify_ioastate(pinstance
,
2216 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS
);
2219 /* bring-up IOA, so proceed with soft reset
2220 * Reinitialize hrrq_buffers and their indices also
2221 * enable interrupts after a pci_restore_state
2223 if (pmcraid_reset_enable_ioa(pinstance
)) {
2224 pinstance
->ioa_state
= IOA_STATE_IN_BRINGUP
;
2225 pmcraid_info("bringing up the adapter\n");
2226 pmcraid_reinit_cmdblk(cmd
);
2227 pmcraid_identify_hrrq(cmd
);
2229 pinstance
->ioa_state
= IOA_STATE_IN_SOFT_RESET
;
2230 pmcraid_soft_reset(cmd
);
2235 case IOA_STATE_IN_SOFT_RESET
:
2236 /* TRANSITION TO OPERATIONAL is on so start initialization
2239 pmcraid_info("In softreset proceeding with bring-up\n");
2240 pinstance
->ioa_state
= IOA_STATE_IN_BRINGUP
;
2242 /* Initialization commands start with HRRQ identification. From
2243 * now on tasklet completes most of the commands as IOA is up
2244 * and intrs are enabled
2246 pmcraid_identify_hrrq(cmd
);
2249 case IOA_STATE_IN_BRINGUP
:
2250 /* we are done with bringing up of IOA, change the ioa_state to
2251 * operational and wake up any waiters
2253 pinstance
->ioa_state
= IOA_STATE_OPERATIONAL
;
2257 case IOA_STATE_OPERATIONAL
:
2259 /* When IOA is operational and a reset is requested, check for
2260 * the reset reason. If reset is to bring down IOA, unregister
2261 * HCAMs and initiate shutdown; if adapter reset is forced then
2262 * restart reset sequence again
2264 if (pinstance
->ioa_shutdown_type
== SHUTDOWN_NONE
&&
2265 pinstance
->force_ioa_reset
== 0) {
2266 pmcraid_notify_ioastate(pinstance
,
2267 PMC_DEVICE_EVENT_RESET_SUCCESS
);
2270 if (pinstance
->ioa_shutdown_type
!= SHUTDOWN_NONE
)
2271 pinstance
->ioa_state
= IOA_STATE_IN_BRINGDOWN
;
2272 pmcraid_reinit_cmdblk(cmd
);
2273 pmcraid_unregister_hcams(cmd
);
2278 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2279 * OPERATIONAL. Reset all control variables used during reset, wake up
2280 * any waiting threads and let the SCSI mid-layer send commands. Note
2281 * that host_lock must be held before invoking scsi_report_bus_reset.
2283 if (reset_complete
) {
2284 pinstance
->ioa_reset_in_progress
= 0;
2285 pinstance
->ioa_reset_attempts
= 0;
2286 pinstance
->reset_cmd
= NULL
;
2287 pinstance
->ioa_shutdown_type
= SHUTDOWN_NONE
;
2288 pinstance
->ioa_bringdown
= 0;
2289 pmcraid_return_cmd(cmd
);
2291 /* If target state is to bring up the adapter, proceed with
2292 * hcam registration and resource exposure to mid-layer.
2294 if (pinstance
->ioa_state
== IOA_STATE_OPERATIONAL
)
2295 pmcraid_register_hcams(pinstance
);
2297 wake_up_all(&pinstance
->reset_wait_q
);
2304 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2305 * ISR/tasklet during error interrupts including IOA unit check. If reset
2306 * is already in progress, it just returns, otherwise initiates IOA reset
2307 * to bring IOA up to operational state.
2309 * @pinstance: pointer to adapter instance structure
2314 static void pmcraid_initiate_reset(struct pmcraid_instance
*pinstance
)
2316 struct pmcraid_cmd
*cmd
;
2318 /* If the reset is already in progress, just return, otherwise start
2319 * reset sequence and return
2321 if (!pinstance
->ioa_reset_in_progress
) {
2322 scsi_block_requests(pinstance
->host
);
2323 cmd
= pmcraid_get_free_cmd(pinstance
);
2326 pmcraid_err("no cmnd blocks for initiate_reset\n");
2330 pinstance
->ioa_shutdown_type
= SHUTDOWN_NONE
;
2331 pinstance
->reset_cmd
= cmd
;
2332 pinstance
->force_ioa_reset
= 1;
2333 pmcraid_notify_ioastate(pinstance
,
2334 PMC_DEVICE_EVENT_RESET_START
);
2335 pmcraid_ioa_reset(cmd
);
2340 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2342 * @pinstance: pointer adapter instance structure
2343 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2344 * @target_state: expected target state after reset
2346 * Note: This command initiates reset and waits for its completion. Hence this
2347 * should not be called from isr/timer/tasklet functions (timeout handlers,
2348 * error response handlers and interrupt handlers).
2351 * 1 in case ioa_state is not target_state, 0 otherwise.
2353 static int pmcraid_reset_reload(
2354 struct pmcraid_instance
*pinstance
,
2359 struct pmcraid_cmd
*reset_cmd
= NULL
;
2360 unsigned long lock_flags
;
2363 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
2365 if (pinstance
->ioa_reset_in_progress
) {
2366 pmcraid_info("reset_reload: reset is already in progress\n");
2368 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2370 wait_event(pinstance
->reset_wait_q
,
2371 !pinstance
->ioa_reset_in_progress
);
2373 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
2375 if (pinstance
->ioa_state
== IOA_STATE_DEAD
) {
2376 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
2378 pmcraid_info("reset_reload: IOA is dead\n");
2380 } else if (pinstance
->ioa_state
== target_state
) {
2386 pmcraid_info("reset_reload: proceeding with reset\n");
2387 scsi_block_requests(pinstance
->host
);
2388 reset_cmd
= pmcraid_get_free_cmd(pinstance
);
2390 if (reset_cmd
== NULL
) {
2391 pmcraid_err("no free cmnd for reset_reload\n");
2392 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
2397 if (shutdown_type
== SHUTDOWN_NORMAL
)
2398 pinstance
->ioa_bringdown
= 1;
2400 pinstance
->ioa_shutdown_type
= shutdown_type
;
2401 pinstance
->reset_cmd
= reset_cmd
;
2402 pinstance
->force_ioa_reset
= reset
;
2403 pmcraid_info("reset_reload: initiating reset\n");
2404 pmcraid_ioa_reset(reset_cmd
);
2405 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2406 pmcraid_info("reset_reload: waiting for reset to complete\n");
2407 wait_event(pinstance
->reset_wait_q
,
2408 !pinstance
->ioa_reset_in_progress
);
2410 pmcraid_info("reset_reload: reset is complete !!\n");
2411 scsi_unblock_requests(pinstance
->host
);
2412 if (pinstance
->ioa_state
== target_state
)
2420 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2422 * @pinstance: pointer to adapter instance structure
2425 * whatever is returned from pmcraid_reset_reload
2427 static int pmcraid_reset_bringdown(struct pmcraid_instance
*pinstance
)
2429 return pmcraid_reset_reload(pinstance
,
2435 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2437 * @pinstance: pointer to adapter instance structure
2440 * whatever is returned from pmcraid_reset_reload
2442 static int pmcraid_reset_bringup(struct pmcraid_instance
*pinstance
)
2444 pmcraid_notify_ioastate(pinstance
, PMC_DEVICE_EVENT_RESET_START
);
2446 return pmcraid_reset_reload(pinstance
,
2448 IOA_STATE_OPERATIONAL
);
2452 * pmcraid_request_sense - Send request sense to a device
2453 * @cmd: pmcraid command struct
2455 * This function sends a request sense to a device as a result of a check
2456 * condition. This method re-uses the same command block that failed earlier.
2458 static void pmcraid_request_sense(struct pmcraid_cmd
*cmd
)
2460 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2461 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
2463 /* allocate DMAable memory for sense buffers */
2464 cmd
->sense_buffer
= pci_alloc_consistent(cmd
->drv_inst
->pdev
,
2465 SCSI_SENSE_BUFFERSIZE
,
2466 &cmd
->sense_buffer_dma
);
2468 if (cmd
->sense_buffer
== NULL
) {
2470 ("couldn't allocate sense buffer for request sense\n");
2471 pmcraid_erp_done(cmd
);
2475 /* re-use the command block */
2476 memset(&cmd
->ioa_cb
->ioasa
, 0, sizeof(struct pmcraid_ioasa
));
2477 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
2478 ioarcb
->request_flags0
= (SYNC_COMPLETE
|
2481 ioarcb
->request_type
= REQ_TYPE_SCSI
;
2482 ioarcb
->cdb
[0] = REQUEST_SENSE
;
2483 ioarcb
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2485 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
2486 offsetof(struct pmcraid_ioarcb
,
2487 add_data
.u
.ioadl
[0]));
2488 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
2490 ioarcb
->data_transfer_length
= cpu_to_le32(SCSI_SENSE_BUFFERSIZE
);
2492 ioadl
->address
= cpu_to_le64(cmd
->sense_buffer_dma
);
2493 ioadl
->data_len
= cpu_to_le32(SCSI_SENSE_BUFFERSIZE
);
2494 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
2496 /* request sense might be called as part of error response processing
2497 * which runs in tasklets context. It is possible that mid-layer might
2498 * schedule queuecommand during this time, hence, writting to IOARRIN
2499 * must be protect by host_lock
2501 pmcraid_send_cmd(cmd
, pmcraid_erp_done
,
2502 PMCRAID_REQUEST_SENSE_TIMEOUT
,
2503 pmcraid_timeout_handler
);
2507 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2508 * @cmd: command that failed
2509 * @sense: true if request_sense is required after cancel all
2511 * This function sends a cancel all to a device to clear the queue.
2513 static void pmcraid_cancel_all(struct pmcraid_cmd
*cmd
, u32 sense
)
2515 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2516 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2517 struct pmcraid_resource_entry
*res
= scsi_cmd
->device
->hostdata
;
2518 void (*cmd_done
) (struct pmcraid_cmd
*) = sense
? pmcraid_erp_done
2519 : pmcraid_request_sense
;
2521 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
2522 ioarcb
->request_flags0
= SYNC_OVERRIDE
;
2523 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
2524 ioarcb
->cdb
[0] = PMCRAID_CANCEL_ALL_REQUESTS
;
2526 if (RES_IS_GSCSI(res
->cfg_entry
))
2527 ioarcb
->cdb
[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL
;
2529 ioarcb
->ioadl_bus_addr
= 0;
2530 ioarcb
->ioadl_length
= 0;
2531 ioarcb
->data_transfer_length
= 0;
2532 ioarcb
->ioarcb_bus_addr
&= (~0x1FULL
);
2534 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2535 * schedule queuecommand while we are doing this
2537 pmcraid_send_cmd(cmd
, cmd_done
,
2538 PMCRAID_REQUEST_SENSE_TIMEOUT
,
2539 pmcraid_timeout_handler
);
2543 * pmcraid_frame_auto_sense: frame fixed format sense information
2545 * @cmd: pointer to failing command block
2550 static void pmcraid_frame_auto_sense(struct pmcraid_cmd
*cmd
)
2552 u8
*sense_buf
= cmd
->scsi_cmd
->sense_buffer
;
2553 struct pmcraid_resource_entry
*res
= cmd
->scsi_cmd
->device
->hostdata
;
2554 struct pmcraid_ioasa
*ioasa
= &cmd
->ioa_cb
->ioasa
;
2555 u32 ioasc
= le32_to_cpu(ioasa
->ioasc
);
2556 u32 failing_lba
= 0;
2558 memset(sense_buf
, 0, SCSI_SENSE_BUFFERSIZE
);
2559 cmd
->scsi_cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2561 if (RES_IS_VSET(res
->cfg_entry
) &&
2562 ioasc
== PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
&&
2563 ioasa
->u
.vset
.failing_lba_hi
!= 0) {
2565 sense_buf
[0] = 0x72;
2566 sense_buf
[1] = PMCRAID_IOASC_SENSE_KEY(ioasc
);
2567 sense_buf
[2] = PMCRAID_IOASC_SENSE_CODE(ioasc
);
2568 sense_buf
[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc
);
2572 sense_buf
[9] = 0x0A;
2573 sense_buf
[10] = 0x80;
2575 failing_lba
= le32_to_cpu(ioasa
->u
.vset
.failing_lba_hi
);
2577 sense_buf
[12] = (failing_lba
& 0xff000000) >> 24;
2578 sense_buf
[13] = (failing_lba
& 0x00ff0000) >> 16;
2579 sense_buf
[14] = (failing_lba
& 0x0000ff00) >> 8;
2580 sense_buf
[15] = failing_lba
& 0x000000ff;
2582 failing_lba
= le32_to_cpu(ioasa
->u
.vset
.failing_lba_lo
);
2584 sense_buf
[16] = (failing_lba
& 0xff000000) >> 24;
2585 sense_buf
[17] = (failing_lba
& 0x00ff0000) >> 16;
2586 sense_buf
[18] = (failing_lba
& 0x0000ff00) >> 8;
2587 sense_buf
[19] = failing_lba
& 0x000000ff;
2589 sense_buf
[0] = 0x70;
2590 sense_buf
[2] = PMCRAID_IOASC_SENSE_KEY(ioasc
);
2591 sense_buf
[12] = PMCRAID_IOASC_SENSE_CODE(ioasc
);
2592 sense_buf
[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc
);
2594 if (ioasc
== PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
) {
2595 if (RES_IS_VSET(res
->cfg_entry
))
2597 le32_to_cpu(ioasa
->u
.
2598 vset
.failing_lba_lo
);
2599 sense_buf
[0] |= 0x80;
2600 sense_buf
[3] = (failing_lba
>> 24) & 0xff;
2601 sense_buf
[4] = (failing_lba
>> 16) & 0xff;
2602 sense_buf
[5] = (failing_lba
>> 8) & 0xff;
2603 sense_buf
[6] = failing_lba
& 0xff;
2606 sense_buf
[7] = 6; /* additional length */
2611 * pmcraid_error_handler - Error response handlers for a SCSI op
2612 * @cmd: pointer to pmcraid_cmd that has failed
2614 * This function determines whether or not to initiate ERP on the affected
2615 * device. This is called from a tasklet, which doesn't hold any locks.
2618 * 0 it caller can complete the request, otherwise 1 where in error
2619 * handler itself completes the request and returns the command block
2622 static int pmcraid_error_handler(struct pmcraid_cmd
*cmd
)
2624 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2625 struct pmcraid_resource_entry
*res
= scsi_cmd
->device
->hostdata
;
2626 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
2627 struct pmcraid_ioasa
*ioasa
= &cmd
->ioa_cb
->ioasa
;
2628 u32 ioasc
= le32_to_cpu(ioasa
->ioasc
);
2629 u32 masked_ioasc
= ioasc
& PMCRAID_IOASC_SENSE_MASK
;
2630 u32 sense_copied
= 0;
2633 pmcraid_info("resource pointer is NULL\n");
2637 /* If this was a SCSI read/write command keep count of errors */
2638 if (SCSI_CMD_TYPE(scsi_cmd
->cmnd
[0]) == SCSI_READ_CMD
)
2639 atomic_inc(&res
->read_failures
);
2640 else if (SCSI_CMD_TYPE(scsi_cmd
->cmnd
[0]) == SCSI_WRITE_CMD
)
2641 atomic_inc(&res
->write_failures
);
2643 if (!RES_IS_GSCSI(res
->cfg_entry
) &&
2644 masked_ioasc
!= PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR
) {
2645 pmcraid_frame_auto_sense(cmd
);
2648 /* Log IOASC/IOASA information based on user settings */
2649 pmcraid_ioasc_logger(ioasc
, cmd
);
2651 switch (masked_ioasc
) {
2653 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST
:
2654 scsi_cmd
->result
|= (DID_ABORT
<< 16);
2657 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE
:
2658 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE
:
2659 scsi_cmd
->result
|= (DID_NO_CONNECT
<< 16);
2662 case PMCRAID_IOASC_NR_SYNC_REQUIRED
:
2664 scsi_cmd
->result
|= (DID_IMM_RETRY
<< 16);
2667 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
:
2668 scsi_cmd
->result
|= (DID_PASSTHROUGH
<< 16);
2671 case PMCRAID_IOASC_UA_BUS_WAS_RESET
:
2672 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER
:
2673 if (!res
->reset_progress
)
2674 scsi_report_bus_reset(pinstance
->host
,
2675 scsi_cmd
->device
->channel
);
2676 scsi_cmd
->result
|= (DID_ERROR
<< 16);
2679 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR
:
2680 scsi_cmd
->result
|= PMCRAID_IOASC_SENSE_STATUS(ioasc
);
2683 /* if check_condition is not active return with error otherwise
2684 * get/frame the sense buffer
2686 if (PMCRAID_IOASC_SENSE_STATUS(ioasc
) !=
2687 SAM_STAT_CHECK_CONDITION
&&
2688 PMCRAID_IOASC_SENSE_STATUS(ioasc
) != SAM_STAT_ACA_ACTIVE
)
2691 /* If we have auto sense data as part of IOASA pass it to
2694 if (ioasa
->auto_sense_length
!= 0) {
2695 short sense_len
= ioasa
->auto_sense_length
;
2696 int data_size
= min_t(u16
, le16_to_cpu(sense_len
),
2697 SCSI_SENSE_BUFFERSIZE
);
2699 memcpy(scsi_cmd
->sense_buffer
,
2705 if (RES_IS_GSCSI(res
->cfg_entry
))
2706 pmcraid_cancel_all(cmd
, sense_copied
);
2707 else if (sense_copied
)
2708 pmcraid_erp_done(cmd
);
2710 pmcraid_request_sense(cmd
);
2714 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED
:
2718 if (PMCRAID_IOASC_SENSE_KEY(ioasc
) > RECOVERED_ERROR
)
2719 scsi_cmd
->result
|= (DID_ERROR
<< 16);
2726 * pmcraid_reset_device - device reset handler functions
2728 * @scsi_cmd: scsi command struct
2729 * @modifier: reset modifier indicating the reset sequence to be performed
2731 * This function issues a device reset to the affected device.
2732 * A LUN reset will be sent to the device first. If that does
2733 * not work, a target reset will be sent.
2738 static int pmcraid_reset_device(
2739 struct scsi_cmnd
*scsi_cmd
,
2740 unsigned long timeout
,
2744 struct pmcraid_cmd
*cmd
;
2745 struct pmcraid_instance
*pinstance
;
2746 struct pmcraid_resource_entry
*res
;
2747 struct pmcraid_ioarcb
*ioarcb
;
2748 unsigned long lock_flags
;
2752 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
2753 res
= scsi_cmd
->device
->hostdata
;
2756 sdev_printk(KERN_ERR
, scsi_cmd
->device
,
2757 "reset_device: NULL resource pointer\n");
2761 /* If adapter is currently going through reset/reload, return failed.
2762 * This will force the mid-layer to call _eh_bus/host reset, which
2763 * will then go to sleep and wait for the reset to complete
2765 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
2766 if (pinstance
->ioa_reset_in_progress
||
2767 pinstance
->ioa_state
== IOA_STATE_DEAD
) {
2768 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2772 res
->reset_progress
= 1;
2773 pmcraid_info("Resetting %s resource with addr %x\n",
2774 ((modifier
& RESET_DEVICE_LUN
) ? "LUN" :
2775 ((modifier
& RESET_DEVICE_TARGET
) ? "TARGET" : "BUS")),
2776 le32_to_cpu(res
->cfg_entry
.resource_address
));
2778 /* get a free cmd block */
2779 cmd
= pmcraid_get_free_cmd(pinstance
);
2782 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2783 pmcraid_err("%s: no cmd blocks are available\n", __func__
);
2787 ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2788 ioarcb
->resource_handle
= res
->cfg_entry
.resource_handle
;
2789 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
2790 ioarcb
->cdb
[0] = PMCRAID_RESET_DEVICE
;
2792 /* Initialize reset modifier bits */
2794 modifier
= ENABLE_RESET_MODIFIER
| modifier
;
2796 ioarcb
->cdb
[1] = modifier
;
2798 init_completion(&cmd
->wait_for_completion
);
2799 cmd
->completion_req
= 1;
2801 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2802 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2803 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.resource_handle
),
2804 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2);
2806 pmcraid_send_cmd(cmd
,
2807 pmcraid_internal_done
,
2809 pmcraid_timeout_handler
);
2811 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2813 /* RESET_DEVICE command completes after all pending IOARCBs are
2814 * completed. Once this command is completed, pmcraind_internal_done
2815 * will wake up the 'completion' queue.
2817 wait_for_completion(&cmd
->wait_for_completion
);
2819 /* complete the command here itself and return the command block
2822 pmcraid_return_cmd(cmd
);
2823 res
->reset_progress
= 0;
2824 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
2826 /* set the return value based on the returned ioasc */
2827 return PMCRAID_IOASC_SENSE_KEY(ioasc
) ? FAILED
: SUCCESS
;
2831 * _pmcraid_io_done - helper for pmcraid_io_done function
2833 * @cmd: pointer to pmcraid command struct
2834 * @reslen: residual data length to be set in the ioasa
2835 * @ioasc: ioasc either returned by IOA or set by driver itself.
2837 * This function is invoked by pmcraid_io_done to complete mid-layer
2841 * 0 if caller is required to return it to free_pool. Returns 1 if
2842 * caller need not worry about freeing command block as error handler
2843 * will take care of that.
2846 static int _pmcraid_io_done(struct pmcraid_cmd
*cmd
, int reslen
, int ioasc
)
2848 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2851 scsi_set_resid(scsi_cmd
, reslen
);
2853 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2854 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
2855 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2856 ioasc
, scsi_cmd
->result
);
2858 if (PMCRAID_IOASC_SENSE_KEY(ioasc
) != 0)
2859 rc
= pmcraid_error_handler(cmd
);
2862 scsi_dma_unmap(scsi_cmd
);
2863 scsi_cmd
->scsi_done(scsi_cmd
);
2870 * pmcraid_io_done - SCSI completion function
2872 * @cmd: pointer to pmcraid command struct
2874 * This function is invoked by tasklet/mid-layer error handler to completing
2875 * the SCSI ops sent from mid-layer.
2881 static void pmcraid_io_done(struct pmcraid_cmd
*cmd
)
2883 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
2884 u32 reslen
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.residual_data_length
);
2886 if (_pmcraid_io_done(cmd
, reslen
, ioasc
) == 0)
2887 pmcraid_return_cmd(cmd
);
2891 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2893 * @cmd: command block of the command to be aborted
2896 * returns pointer to command structure used as cancelling cmd
2898 static struct pmcraid_cmd
*pmcraid_abort_cmd(struct pmcraid_cmd
*cmd
)
2900 struct pmcraid_cmd
*cancel_cmd
;
2901 struct pmcraid_instance
*pinstance
;
2902 struct pmcraid_resource_entry
*res
;
2904 pinstance
= (struct pmcraid_instance
*)cmd
->drv_inst
;
2905 res
= cmd
->scsi_cmd
->device
->hostdata
;
2907 cancel_cmd
= pmcraid_get_free_cmd(pinstance
);
2909 if (cancel_cmd
== NULL
) {
2910 pmcraid_err("%s: no cmd blocks are available\n", __func__
);
2914 pmcraid_prepare_cancel_cmd(cancel_cmd
, cmd
);
2916 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2917 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2918 cmd
->ioa_cb
->ioarcb
.response_handle
>> 2);
2920 init_completion(&cancel_cmd
->wait_for_completion
);
2921 cancel_cmd
->completion_req
= 1;
2923 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2924 le32_to_cpu(cancel_cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
2925 cancel_cmd
->ioa_cb
->ioarcb
.cdb
[0],
2926 le32_to_cpu(cancel_cmd
->ioa_cb
->ioarcb
.resource_handle
));
2928 pmcraid_send_cmd(cancel_cmd
,
2929 pmcraid_internal_done
,
2930 PMCRAID_INTERNAL_TIMEOUT
,
2931 pmcraid_timeout_handler
);
2936 * pmcraid_abort_complete - Waits for ABORT TASK completion
2938 * @cancel_cmd: command block use as cancelling command
2941 * returns SUCCESS if ABORT TASK has good completion
2944 static int pmcraid_abort_complete(struct pmcraid_cmd
*cancel_cmd
)
2946 struct pmcraid_resource_entry
*res
;
2949 wait_for_completion(&cancel_cmd
->wait_for_completion
);
2950 res
= cancel_cmd
->res
;
2951 cancel_cmd
->res
= NULL
;
2952 ioasc
= le32_to_cpu(cancel_cmd
->ioa_cb
->ioasa
.ioasc
);
2954 /* If the abort task is not timed out we will get a Good completion
2955 * as sense_key, otherwise we may get one the following responses
2956 * due to subsequent bus reset or device reset. In case IOASC is
2957 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2959 if (ioasc
== PMCRAID_IOASC_UA_BUS_WAS_RESET
||
2960 ioasc
== PMCRAID_IOASC_NR_SYNC_REQUIRED
) {
2961 if (ioasc
== PMCRAID_IOASC_NR_SYNC_REQUIRED
)
2966 /* complete the command here itself */
2967 pmcraid_return_cmd(cancel_cmd
);
2968 return PMCRAID_IOASC_SENSE_KEY(ioasc
) ? FAILED
: SUCCESS
;
2972 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
2974 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
2975 * mid-layer ensures that no other commands are queued. This
2976 * never gets called under interrupt, but a separate eh thread.
2981 static int pmcraid_eh_abort_handler(struct scsi_cmnd
*scsi_cmd
)
2983 struct pmcraid_instance
*pinstance
;
2984 struct pmcraid_cmd
*cmd
;
2985 struct pmcraid_resource_entry
*res
;
2986 unsigned long host_lock_flags
;
2987 unsigned long pending_lock_flags
;
2988 struct pmcraid_cmd
*cancel_cmd
= NULL
;
2993 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
2995 scmd_printk(KERN_INFO
, scsi_cmd
,
2996 "I/O command timed out, aborting it.\n");
2998 res
= scsi_cmd
->device
->hostdata
;
3003 /* If we are currently going through reset/reload, return failed.
3004 * This will force the mid-layer to eventually call
3005 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3008 spin_lock_irqsave(pinstance
->host
->host_lock
, host_lock_flags
);
3010 if (pinstance
->ioa_reset_in_progress
||
3011 pinstance
->ioa_state
== IOA_STATE_DEAD
) {
3012 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
3017 /* loop over pending cmd list to find cmd corresponding to this
3018 * scsi_cmd. Note that this command might not have been completed
3019 * already. locking: all pending commands are protected with
3020 * pending_pool_lock.
3022 spin_lock_irqsave(&pinstance
->pending_pool_lock
, pending_lock_flags
);
3023 list_for_each_entry(cmd
, &pinstance
->pending_cmd_pool
, free_list
) {
3025 if (cmd
->scsi_cmd
== scsi_cmd
) {
3031 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
,
3032 pending_lock_flags
);
3034 /* If the command to be aborted was given to IOA and still pending with
3035 * it, send ABORT_TASK to abort this and wait for its completion
3038 cancel_cmd
= pmcraid_abort_cmd(cmd
);
3040 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
3044 cancel_cmd
->res
= cmd
->scsi_cmd
->device
->hostdata
;
3045 rc
= pmcraid_abort_complete(cancel_cmd
);
3048 return cmd_found
? rc
: SUCCESS
;
3052 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3054 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3056 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3057 * Since these are called from mid-layer EH thread, no other IO will be queued
3058 * to the resource being reset. However, control path (IOCTL) may be active so
3059 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3060 * takes care by locking/unlocking host_lock.
3065 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd
*scmd
)
3067 scmd_printk(KERN_INFO
, scmd
,
3068 "resetting device due to an I/O command timeout.\n");
3069 return pmcraid_reset_device(scmd
,
3070 PMCRAID_INTERNAL_TIMEOUT
,
3074 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd
*scmd
)
3076 scmd_printk(KERN_INFO
, scmd
,
3077 "Doing bus reset due to an I/O command timeout.\n");
3078 return pmcraid_reset_device(scmd
,
3079 PMCRAID_RESET_BUS_TIMEOUT
,
3083 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd
*scmd
)
3085 scmd_printk(KERN_INFO
, scmd
,
3086 "Doing target reset due to an I/O command timeout.\n");
3087 return pmcraid_reset_device(scmd
,
3088 PMCRAID_INTERNAL_TIMEOUT
,
3089 RESET_DEVICE_TARGET
);
3093 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3095 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3097 * Initiates adapter reset to bring it up to operational state
3102 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd
*scmd
)
3104 unsigned long interval
= 10000; /* 10 seconds interval */
3105 int waits
= jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT
) / interval
;
3106 struct pmcraid_instance
*pinstance
=
3107 (struct pmcraid_instance
*)(scmd
->device
->host
->hostdata
);
3110 /* wait for an additional 150 seconds just in case firmware could come
3111 * up and if it could complete all the pending commands excluding the
3112 * two HCAM (CCN and LDN).
3115 if (atomic_read(&pinstance
->outstanding_cmds
) <=
3116 PMCRAID_MAX_HCAM_CMD
)
3121 dev_err(&pinstance
->pdev
->dev
,
3122 "Adapter being reset due to an I/O command timeout.\n");
3123 return pmcraid_reset_bringup(pinstance
) == 0 ? SUCCESS
: FAILED
;
3127 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3128 * @cmd: pmcraid command struct
3129 * @sgcount: count of scatter-gather elements
3132 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3133 * or external IOADLs
3135 static struct pmcraid_ioadl_desc
*
3136 pmcraid_init_ioadls(struct pmcraid_cmd
*cmd
, int sgcount
)
3138 struct pmcraid_ioadl_desc
*ioadl
;
3139 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
3140 int ioadl_count
= 0;
3142 if (ioarcb
->add_cmd_param_length
)
3143 ioadl_count
= DIV_ROUND_UP(ioarcb
->add_cmd_param_length
, 16);
3144 ioarcb
->ioadl_length
=
3145 sizeof(struct pmcraid_ioadl_desc
) * sgcount
;
3147 if ((sgcount
+ ioadl_count
) > (ARRAY_SIZE(ioarcb
->add_data
.u
.ioadl
))) {
3148 /* external ioadls start at offset 0x80 from control_block
3149 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3150 * It is necessary to indicate to firmware that driver is
3151 * using ioadls to be treated as external to IOARCB.
3153 ioarcb
->ioarcb_bus_addr
&= ~(0x1FULL
);
3154 ioarcb
->ioadl_bus_addr
=
3155 cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
3156 offsetof(struct pmcraid_ioarcb
,
3157 add_data
.u
.ioadl
[3]));
3158 ioadl
= &ioarcb
->add_data
.u
.ioadl
[3];
3160 ioarcb
->ioadl_bus_addr
=
3161 cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
3162 offsetof(struct pmcraid_ioarcb
,
3163 add_data
.u
.ioadl
[ioadl_count
]));
3165 ioadl
= &ioarcb
->add_data
.u
.ioadl
[ioadl_count
];
3166 ioarcb
->ioarcb_bus_addr
|=
3167 DIV_ROUND_CLOSEST(sgcount
+ ioadl_count
, 8);
3174 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3175 * @pinstance: pointer to adapter instance structure
3176 * @cmd: pmcraid command struct
3178 * This function is invoked by queuecommand entry point while sending a command
3179 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3182 * 0 on success or -1 on failure
3184 static int pmcraid_build_ioadl(
3185 struct pmcraid_instance
*pinstance
,
3186 struct pmcraid_cmd
*cmd
3190 struct scatterlist
*sglist
;
3192 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
3193 struct pmcraid_ioarcb
*ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3194 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
3196 u32 length
= scsi_bufflen(scsi_cmd
);
3201 nseg
= scsi_dma_map(scsi_cmd
);
3204 scmd_printk(KERN_ERR
, scsi_cmd
, "scsi_map_dma failed!\n");
3206 } else if (nseg
> PMCRAID_MAX_IOADLS
) {
3207 scsi_dma_unmap(scsi_cmd
);
3208 scmd_printk(KERN_ERR
, scsi_cmd
,
3209 "sg count is (%d) more than allowed!\n", nseg
);
3213 /* Initialize IOARCB data transfer length fields */
3214 if (scsi_cmd
->sc_data_direction
== DMA_TO_DEVICE
)
3215 ioarcb
->request_flags0
|= TRANSFER_DIR_WRITE
;
3217 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3218 ioarcb
->data_transfer_length
= cpu_to_le32(length
);
3219 ioadl
= pmcraid_init_ioadls(cmd
, nseg
);
3221 /* Initialize IOADL descriptor addresses */
3222 scsi_for_each_sg(scsi_cmd
, sglist
, nseg
, i
) {
3223 ioadl
[i
].data_len
= cpu_to_le32(sg_dma_len(sglist
));
3224 ioadl
[i
].address
= cpu_to_le64(sg_dma_address(sglist
));
3227 /* setup last descriptor */
3228 ioadl
[i
- 1].flags
= IOADL_FLAGS_LAST_DESC
;
3234 * pmcraid_free_sglist - Frees an allocated SG buffer list
3235 * @sglist: scatter/gather list pointer
3237 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3242 static void pmcraid_free_sglist(struct pmcraid_sglist
*sglist
)
3246 for (i
= 0; i
< sglist
->num_sg
; i
++)
3247 __free_pages(sg_page(&(sglist
->scatterlist
[i
])),
3254 * pmcraid_alloc_sglist - Allocates memory for a SG list
3255 * @buflen: buffer length
3257 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3261 * pointer to sglist / NULL on failure
3263 static struct pmcraid_sglist
*pmcraid_alloc_sglist(int buflen
)
3265 struct pmcraid_sglist
*sglist
;
3266 struct scatterlist
*scatterlist
;
3273 sg_size
= buflen
/ (PMCRAID_MAX_IOADLS
- 1);
3274 order
= (sg_size
> 0) ? get_order(sg_size
) : 0;
3275 bsize_elem
= PAGE_SIZE
* (1 << order
);
3277 /* Determine the actual number of sg entries needed */
3278 if (buflen
% bsize_elem
)
3279 num_elem
= (buflen
/ bsize_elem
) + 1;
3281 num_elem
= buflen
/ bsize_elem
;
3283 /* Allocate a scatter/gather list for the DMA */
3284 sglist
= kzalloc(sizeof(struct pmcraid_sglist
) +
3285 (sizeof(struct scatterlist
) * (num_elem
- 1)),
3291 scatterlist
= sglist
->scatterlist
;
3292 sg_init_table(scatterlist
, num_elem
);
3293 sglist
->order
= order
;
3294 sglist
->num_sg
= num_elem
;
3297 for (i
= 0; i
< num_elem
; i
++) {
3298 page
= alloc_pages(GFP_KERNEL
|GFP_DMA
|__GFP_ZERO
, order
);
3300 for (j
= i
- 1; j
>= 0; j
--)
3301 __free_pages(sg_page(&scatterlist
[j
]), order
);
3306 sg_set_page(&scatterlist
[i
], page
,
3307 sg_size
< bsize_elem
? sg_size
: bsize_elem
, 0);
3308 sg_size
-= bsize_elem
;
3315 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3316 * @sglist: scatter/gather list pointer
3317 * @buffer: buffer pointer
3318 * @len: buffer length
3319 * @direction: data transfer direction
3321 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3324 * 0 on success / other on failure
3326 static int pmcraid_copy_sglist(
3327 struct pmcraid_sglist
*sglist
,
3328 unsigned long buffer
,
3333 struct scatterlist
*scatterlist
;
3339 /* Determine the actual number of bytes per element */
3340 bsize_elem
= PAGE_SIZE
* (1 << sglist
->order
);
3342 scatterlist
= sglist
->scatterlist
;
3344 for (i
= 0; i
< (len
/ bsize_elem
); i
++, buffer
+= bsize_elem
) {
3345 struct page
*page
= sg_page(&scatterlist
[i
]);
3348 if (direction
== DMA_TO_DEVICE
)
3349 rc
= __copy_from_user(kaddr
,
3353 rc
= __copy_to_user((void *)buffer
, kaddr
, bsize_elem
);
3358 pmcraid_err("failed to copy user data into sg list\n");
3362 scatterlist
[i
].length
= bsize_elem
;
3365 if (len
% bsize_elem
) {
3366 struct page
*page
= sg_page(&scatterlist
[i
]);
3370 if (direction
== DMA_TO_DEVICE
)
3371 rc
= __copy_from_user(kaddr
,
3375 rc
= __copy_to_user((void *)buffer
,
3381 scatterlist
[i
].length
= len
% bsize_elem
;
3385 pmcraid_err("failed to copy user data into sg list\n");
3393 * pmcraid_queuecommand - Queue a mid-layer request
3394 * @scsi_cmd: scsi command struct
3395 * @done: done function
3397 * This function queues a request generated by the mid-layer. Midlayer calls
3398 * this routine within host->lock. Some of the functions called by queuecommand
3399 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3403 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3404 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3406 static int pmcraid_queuecommand_lck(
3407 struct scsi_cmnd
*scsi_cmd
,
3408 void (*done
) (struct scsi_cmnd
*)
3411 struct pmcraid_instance
*pinstance
;
3412 struct pmcraid_resource_entry
*res
;
3413 struct pmcraid_ioarcb
*ioarcb
;
3414 struct pmcraid_cmd
*cmd
;
3419 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
3420 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
3421 scsi_cmd
->scsi_done
= done
;
3422 res
= scsi_cmd
->device
->hostdata
;
3423 scsi_cmd
->result
= (DID_OK
<< 16);
3425 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3428 if (pinstance
->ioa_state
== IOA_STATE_DEAD
) {
3429 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3430 scsi_cmd
->result
= (DID_NO_CONNECT
<< 16);
3431 scsi_cmd
->scsi_done(scsi_cmd
);
3435 /* If IOA reset is in progress, can't queue the commands */
3436 if (pinstance
->ioa_reset_in_progress
)
3437 return SCSI_MLQUEUE_HOST_BUSY
;
3439 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3440 * the command here itself with success return
3442 if (scsi_cmd
->cmnd
[0] == SYNCHRONIZE_CACHE
) {
3443 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3444 scsi_cmd
->scsi_done(scsi_cmd
);
3448 /* initialize the command and IOARCB to be sent to IOA */
3449 cmd
= pmcraid_get_free_cmd(pinstance
);
3452 pmcraid_err("free command block is not available\n");
3453 return SCSI_MLQUEUE_HOST_BUSY
;
3456 cmd
->scsi_cmd
= scsi_cmd
;
3457 ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3458 memcpy(ioarcb
->cdb
, scsi_cmd
->cmnd
, scsi_cmd
->cmd_len
);
3459 ioarcb
->resource_handle
= res
->cfg_entry
.resource_handle
;
3460 ioarcb
->request_type
= REQ_TYPE_SCSI
;
3462 /* set hrrq number where the IOA should respond to. Note that all cmds
3463 * generated internally uses hrrq_id 0, exception to this is the cmd
3464 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3465 * hrrq_id assigned here in queuecommand
3467 ioarcb
->hrrq_id
= atomic_add_return(1, &(pinstance
->last_message_id
)) %
3468 pinstance
->num_hrrq
;
3469 cmd
->cmd_done
= pmcraid_io_done
;
3471 if (RES_IS_GSCSI(res
->cfg_entry
) || RES_IS_VSET(res
->cfg_entry
)) {
3472 if (scsi_cmd
->underflow
== 0)
3473 ioarcb
->request_flags0
|= INHIBIT_UL_CHECK
;
3475 if (res
->sync_reqd
) {
3476 ioarcb
->request_flags0
|= SYNC_COMPLETE
;
3480 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3482 if (scsi_cmd
->flags
& SCMD_TAGGED
)
3483 ioarcb
->request_flags1
|= TASK_TAG_SIMPLE
;
3485 if (RES_IS_GSCSI(res
->cfg_entry
))
3486 ioarcb
->request_flags1
|= DELAY_AFTER_RESET
;
3489 rc
= pmcraid_build_ioadl(pinstance
, cmd
);
3491 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3492 le32_to_cpu(ioarcb
->response_handle
) >> 2,
3493 scsi_cmd
->cmnd
[0], pinstance
->host
->unique_id
,
3494 RES_IS_VSET(res
->cfg_entry
) ? PMCRAID_VSET_BUS_ID
:
3495 PMCRAID_PHYS_BUS_ID
,
3496 RES_IS_VSET(res
->cfg_entry
) ?
3497 (fw_version
<= PMCRAID_FW_VERSION_1
?
3498 res
->cfg_entry
.unique_flags1
:
3499 res
->cfg_entry
.array_id
& 0xFF) :
3500 RES_TARGET(res
->cfg_entry
.resource_address
),
3501 RES_LUN(res
->cfg_entry
.resource_address
));
3503 if (likely(rc
== 0)) {
3504 _pmcraid_fire_command(cmd
);
3506 pmcraid_err("queuecommand could not build ioadl\n");
3507 pmcraid_return_cmd(cmd
);
3508 rc
= SCSI_MLQUEUE_HOST_BUSY
;
3514 static DEF_SCSI_QCMD(pmcraid_queuecommand
)
3517 * pmcraid_open -char node "open" entry, allowed only users with admin access
3519 static int pmcraid_chr_open(struct inode
*inode
, struct file
*filep
)
3521 struct pmcraid_instance
*pinstance
;
3523 if (!capable(CAP_SYS_ADMIN
))
3526 /* Populate adapter instance * pointer for use by ioctl */
3527 pinstance
= container_of(inode
->i_cdev
, struct pmcraid_instance
, cdev
);
3528 filep
->private_data
= pinstance
;
3534 * pmcraid_fasync - Async notifier registration from applications
3536 * This function adds the calling process to a driver global queue. When an
3537 * event occurs, SIGIO will be sent to all processes in this queue.
3539 static int pmcraid_chr_fasync(int fd
, struct file
*filep
, int mode
)
3541 struct pmcraid_instance
*pinstance
;
3544 pinstance
= filep
->private_data
;
3545 mutex_lock(&pinstance
->aen_queue_lock
);
3546 rc
= fasync_helper(fd
, filep
, mode
, &pinstance
->aen_queue
);
3547 mutex_unlock(&pinstance
->aen_queue_lock
);
3554 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3555 * commands sent over IOCTL interface
3557 * @cmd : pointer to struct pmcraid_cmd
3558 * @buflen : length of the request buffer
3559 * @direction : data transfer direction
3562 * 0 on success, non-zero error code on failure
3564 static int pmcraid_build_passthrough_ioadls(
3565 struct pmcraid_cmd
*cmd
,
3570 struct pmcraid_sglist
*sglist
= NULL
;
3571 struct scatterlist
*sg
= NULL
;
3572 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
3573 struct pmcraid_ioadl_desc
*ioadl
;
3576 sglist
= pmcraid_alloc_sglist(buflen
);
3579 pmcraid_err("can't allocate memory for passthrough SGls\n");
3583 sglist
->num_dma_sg
= pci_map_sg(cmd
->drv_inst
->pdev
,
3584 sglist
->scatterlist
,
3585 sglist
->num_sg
, direction
);
3587 if (!sglist
->num_dma_sg
|| sglist
->num_dma_sg
> PMCRAID_MAX_IOADLS
) {
3588 dev_err(&cmd
->drv_inst
->pdev
->dev
,
3589 "Failed to map passthrough buffer!\n");
3590 pmcraid_free_sglist(sglist
);
3594 cmd
->sglist
= sglist
;
3595 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3597 ioadl
= pmcraid_init_ioadls(cmd
, sglist
->num_dma_sg
);
3599 /* Initialize IOADL descriptor addresses */
3600 for_each_sg(sglist
->scatterlist
, sg
, sglist
->num_dma_sg
, i
) {
3601 ioadl
[i
].data_len
= cpu_to_le32(sg_dma_len(sg
));
3602 ioadl
[i
].address
= cpu_to_le64(sg_dma_address(sg
));
3606 /* setup the last descriptor */
3607 ioadl
[i
- 1].flags
= IOADL_FLAGS_LAST_DESC
;
3614 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3616 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3617 * @buflen: size of the request buffer
3618 * @direction: data transfer direction
3621 * 0 on success, non-zero error code on failure
3623 static void pmcraid_release_passthrough_ioadls(
3624 struct pmcraid_cmd
*cmd
,
3629 struct pmcraid_sglist
*sglist
= cmd
->sglist
;
3632 pci_unmap_sg(cmd
->drv_inst
->pdev
,
3633 sglist
->scatterlist
,
3636 pmcraid_free_sglist(sglist
);
3642 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3644 * @pinstance: pointer to adapter instance structure
3646 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3649 * 0 on success, non-zero error code on failure
3651 static long pmcraid_ioctl_passthrough(
3652 struct pmcraid_instance
*pinstance
,
3653 unsigned int ioctl_cmd
,
3654 unsigned int buflen
,
3658 struct pmcraid_passthrough_ioctl_buffer
*buffer
;
3659 struct pmcraid_ioarcb
*ioarcb
;
3660 struct pmcraid_cmd
*cmd
;
3661 struct pmcraid_cmd
*cancel_cmd
;
3662 unsigned long request_buffer
;
3663 unsigned long request_offset
;
3664 unsigned long lock_flags
;
3669 u8 access
, direction
;
3672 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3673 if (pinstance
->ioa_reset_in_progress
) {
3674 rc
= wait_event_interruptible_timeout(
3675 pinstance
->reset_wait_q
,
3676 !pinstance
->ioa_reset_in_progress
,
3677 msecs_to_jiffies(10000));
3682 return -ERESTARTSYS
;
3685 /* If adapter is not in operational state, return error */
3686 if (pinstance
->ioa_state
!= IOA_STATE_OPERATIONAL
) {
3687 pmcraid_err("IOA is not operational\n");
3691 buffer_size
= sizeof(struct pmcraid_passthrough_ioctl_buffer
);
3692 buffer
= kmalloc(buffer_size
, GFP_KERNEL
);
3695 pmcraid_err("no memory for passthrough buffer\n");
3700 offsetof(struct pmcraid_passthrough_ioctl_buffer
, request_buffer
);
3702 request_buffer
= arg
+ request_offset
;
3704 rc
= __copy_from_user(buffer
,
3705 (struct pmcraid_passthrough_ioctl_buffer
*) arg
,
3706 sizeof(struct pmcraid_passthrough_ioctl_buffer
));
3710 offsetof(struct pmcraid_passthrough_ioctl_buffer
, ioasa
));
3713 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3715 goto out_free_buffer
;
3718 request_size
= buffer
->ioarcb
.data_transfer_length
;
3720 if (buffer
->ioarcb
.request_flags0
& TRANSFER_DIR_WRITE
) {
3721 access
= VERIFY_READ
;
3722 direction
= DMA_TO_DEVICE
;
3724 access
= VERIFY_WRITE
;
3725 direction
= DMA_FROM_DEVICE
;
3728 if (request_size
> 0) {
3729 rc
= access_ok(access
, arg
, request_offset
+ request_size
);
3733 goto out_free_buffer
;
3735 } else if (request_size
< 0) {
3737 goto out_free_buffer
;
3740 /* check if we have any additional command parameters */
3741 if (buffer
->ioarcb
.add_cmd_param_length
> PMCRAID_ADD_CMD_PARAM_LEN
) {
3743 goto out_free_buffer
;
3746 cmd
= pmcraid_get_free_cmd(pinstance
);
3749 pmcraid_err("free command block is not available\n");
3751 goto out_free_buffer
;
3754 cmd
->scsi_cmd
= NULL
;
3755 ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3757 /* Copy the user-provided IOARCB stuff field by field */
3758 ioarcb
->resource_handle
= buffer
->ioarcb
.resource_handle
;
3759 ioarcb
->data_transfer_length
= buffer
->ioarcb
.data_transfer_length
;
3760 ioarcb
->cmd_timeout
= buffer
->ioarcb
.cmd_timeout
;
3761 ioarcb
->request_type
= buffer
->ioarcb
.request_type
;
3762 ioarcb
->request_flags0
= buffer
->ioarcb
.request_flags0
;
3763 ioarcb
->request_flags1
= buffer
->ioarcb
.request_flags1
;
3764 memcpy(ioarcb
->cdb
, buffer
->ioarcb
.cdb
, PMCRAID_MAX_CDB_LEN
);
3766 if (buffer
->ioarcb
.add_cmd_param_length
) {
3767 ioarcb
->add_cmd_param_length
=
3768 buffer
->ioarcb
.add_cmd_param_length
;
3769 ioarcb
->add_cmd_param_offset
=
3770 buffer
->ioarcb
.add_cmd_param_offset
;
3771 memcpy(ioarcb
->add_data
.u
.add_cmd_params
,
3772 buffer
->ioarcb
.add_data
.u
.add_cmd_params
,
3773 buffer
->ioarcb
.add_cmd_param_length
);
3776 /* set hrrq number where the IOA should respond to. Note that all cmds
3777 * generated internally uses hrrq_id 0, exception to this is the cmd
3778 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3779 * hrrq_id assigned here in queuecommand
3781 ioarcb
->hrrq_id
= atomic_add_return(1, &(pinstance
->last_message_id
)) %
3782 pinstance
->num_hrrq
;
3785 rc
= pmcraid_build_passthrough_ioadls(cmd
,
3789 pmcraid_err("couldn't build passthrough ioadls\n");
3792 } else if (request_size
< 0) {
3797 /* If data is being written into the device, copy the data from user
3800 if (direction
== DMA_TO_DEVICE
&& request_size
> 0) {
3801 rc
= pmcraid_copy_sglist(cmd
->sglist
,
3806 pmcraid_err("failed to copy user buffer\n");
3807 goto out_free_sglist
;
3811 /* passthrough ioctl is a blocking command so, put the user to sleep
3812 * until timeout. Note that a timeout value of 0 means, do timeout.
3814 cmd
->cmd_done
= pmcraid_internal_done
;
3815 init_completion(&cmd
->wait_for_completion
);
3816 cmd
->completion_req
= 1;
3818 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3819 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
3820 cmd
->ioa_cb
->ioarcb
.cdb
[0],
3821 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.resource_handle
));
3823 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
3824 _pmcraid_fire_command(cmd
);
3825 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
3827 /* NOTE ! Remove the below line once abort_task is implemented
3828 * in firmware. This line disables ioctl command timeout handling logic
3829 * similar to IO command timeout handling, making ioctl commands to wait
3830 * until the command completion regardless of timeout value specified in
3833 buffer
->ioarcb
.cmd_timeout
= 0;
3835 /* If command timeout is specified put caller to wait till that time,
3836 * otherwise it would be blocking wait. If command gets timed out, it
3839 if (buffer
->ioarcb
.cmd_timeout
== 0) {
3840 wait_for_completion(&cmd
->wait_for_completion
);
3841 } else if (!wait_for_completion_timeout(
3842 &cmd
->wait_for_completion
,
3843 msecs_to_jiffies(buffer
->ioarcb
.cmd_timeout
* 1000))) {
3845 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3846 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
>> 2),
3847 cmd
->ioa_cb
->ioarcb
.cdb
[0]);
3849 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
3850 cancel_cmd
= pmcraid_abort_cmd(cmd
);
3851 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
3854 wait_for_completion(&cancel_cmd
->wait_for_completion
);
3855 ioasc
= cancel_cmd
->ioa_cb
->ioasa
.ioasc
;
3856 pmcraid_return_cmd(cancel_cmd
);
3858 /* if abort task couldn't find the command i.e it got
3859 * completed prior to aborting, return good completion.
3860 * if command got aborted successfully or there was IOA
3861 * reset due to abort task itself getting timedout then
3864 if (ioasc
== PMCRAID_IOASC_IOA_WAS_RESET
||
3865 PMCRAID_IOASC_SENSE_KEY(ioasc
) == 0x00) {
3866 if (ioasc
!= PMCRAID_IOASC_GC_IOARCB_NOTFOUND
)
3868 goto out_handle_response
;
3872 /* no command block for abort task or abort task failed to abort
3873 * the IOARCB, then wait for 150 more seconds and initiate reset
3874 * sequence after timeout
3876 if (!wait_for_completion_timeout(
3877 &cmd
->wait_for_completion
,
3878 msecs_to_jiffies(150 * 1000))) {
3879 pmcraid_reset_bringup(cmd
->drv_inst
);
3884 out_handle_response
:
3885 /* copy entire IOASA buffer and return IOCTL success.
3886 * If copying IOASA to user-buffer fails, return
3889 if (copy_to_user(ioasa
, &cmd
->ioa_cb
->ioasa
,
3890 sizeof(struct pmcraid_ioasa
))) {
3891 pmcraid_err("failed to copy ioasa buffer to user\n");
3895 /* If the data transfer was from device, copy the data onto user
3898 else if (direction
== DMA_FROM_DEVICE
&& request_size
> 0) {
3899 rc
= pmcraid_copy_sglist(cmd
->sglist
,
3904 pmcraid_err("failed to copy user buffer\n");
3910 pmcraid_release_passthrough_ioadls(cmd
, request_size
, direction
);
3913 pmcraid_return_cmd(cmd
);
3925 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3927 * @pinstance: pointer to adapter instance structure
3928 * @cmd: ioctl command passed in
3929 * @buflen: length of user_buffer
3930 * @user_buffer: user buffer pointer
3933 * 0 in case of success, otherwise appropriate error code
3935 static long pmcraid_ioctl_driver(
3936 struct pmcraid_instance
*pinstance
,
3938 unsigned int buflen
,
3939 void __user
*user_buffer
3944 if (!access_ok(VERIFY_READ
, user_buffer
, _IOC_SIZE(cmd
))) {
3945 pmcraid_err("ioctl_driver: access fault in request buffer\n");
3950 case PMCRAID_IOCTL_RESET_ADAPTER
:
3951 pmcraid_reset_bringup(pinstance
);
3963 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
3965 * @cmd: ioctl command
3967 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
3970 * negetive error code if there are access issues, otherwise zero.
3971 * Upon success, returns ioctl header copied out of user buffer.
3974 static int pmcraid_check_ioctl_buffer(
3977 struct pmcraid_ioctl_header
*hdr
3981 int access
= VERIFY_READ
;
3983 if (copy_from_user(hdr
, arg
, sizeof(struct pmcraid_ioctl_header
))) {
3984 pmcraid_err("couldn't copy ioctl header from user buffer\n");
3988 /* check for valid driver signature */
3989 rc
= memcmp(hdr
->signature
,
3990 PMCRAID_IOCTL_SIGNATURE
,
3991 sizeof(hdr
->signature
));
3993 pmcraid_err("signature verification failed\n");
3997 /* check for appropriate buffer access */
3998 if ((_IOC_DIR(cmd
) & _IOC_READ
) == _IOC_READ
)
3999 access
= VERIFY_WRITE
;
4001 rc
= access_ok(access
,
4002 (arg
+ sizeof(struct pmcraid_ioctl_header
)),
4003 hdr
->buffer_length
);
4005 pmcraid_err("access failed for user buffer of size %d\n",
4006 hdr
->buffer_length
);
4014 * pmcraid_ioctl - char node ioctl entry point
4016 static long pmcraid_chr_ioctl(
4022 struct pmcraid_instance
*pinstance
= NULL
;
4023 struct pmcraid_ioctl_header
*hdr
= NULL
;
4024 int retval
= -ENOTTY
;
4026 hdr
= kmalloc(sizeof(struct pmcraid_ioctl_header
), GFP_KERNEL
);
4029 pmcraid_err("failed to allocate memory for ioctl header\n");
4033 retval
= pmcraid_check_ioctl_buffer(cmd
, (void *)arg
, hdr
);
4036 pmcraid_info("chr_ioctl: header check failed\n");
4041 pinstance
= filep
->private_data
;
4044 pmcraid_info("adapter instance is not found\n");
4049 switch (_IOC_TYPE(cmd
)) {
4051 case PMCRAID_PASSTHROUGH_IOCTL
:
4052 /* If ioctl code is to download microcode, we need to block
4053 * mid-layer requests.
4055 if (cmd
== PMCRAID_IOCTL_DOWNLOAD_MICROCODE
)
4056 scsi_block_requests(pinstance
->host
);
4058 retval
= pmcraid_ioctl_passthrough(pinstance
,
4063 if (cmd
== PMCRAID_IOCTL_DOWNLOAD_MICROCODE
)
4064 scsi_unblock_requests(pinstance
->host
);
4067 case PMCRAID_DRIVER_IOCTL
:
4068 arg
+= sizeof(struct pmcraid_ioctl_header
);
4069 retval
= pmcraid_ioctl_driver(pinstance
,
4072 (void __user
*)arg
);
4086 * File operations structure for management interface
4088 static const struct file_operations pmcraid_fops
= {
4089 .owner
= THIS_MODULE
,
4090 .open
= pmcraid_chr_open
,
4091 .fasync
= pmcraid_chr_fasync
,
4092 .unlocked_ioctl
= pmcraid_chr_ioctl
,
4093 #ifdef CONFIG_COMPAT
4094 .compat_ioctl
= pmcraid_chr_ioctl
,
4096 .llseek
= noop_llseek
,
4103 * pmcraid_show_log_level - Display adapter's error logging level
4104 * @dev: class device struct
4108 * number of bytes printed to buffer
4110 static ssize_t
pmcraid_show_log_level(
4112 struct device_attribute
*attr
,
4115 struct Scsi_Host
*shost
= class_to_shost(dev
);
4116 struct pmcraid_instance
*pinstance
=
4117 (struct pmcraid_instance
*)shost
->hostdata
;
4118 return snprintf(buf
, PAGE_SIZE
, "%d\n", pinstance
->current_log_level
);
4122 * pmcraid_store_log_level - Change the adapter's error logging level
4123 * @dev: class device struct
4128 * number of bytes printed to buffer
4130 static ssize_t
pmcraid_store_log_level(
4132 struct device_attribute
*attr
,
4137 struct Scsi_Host
*shost
;
4138 struct pmcraid_instance
*pinstance
;
4141 if (kstrtou8(buf
, 10, &val
))
4143 /* log-level should be from 0 to 2 */
4147 shost
= class_to_shost(dev
);
4148 pinstance
= (struct pmcraid_instance
*)shost
->hostdata
;
4149 pinstance
->current_log_level
= val
;
4154 static struct device_attribute pmcraid_log_level_attr
= {
4156 .name
= "log_level",
4157 .mode
= S_IRUGO
| S_IWUSR
,
4159 .show
= pmcraid_show_log_level
,
4160 .store
= pmcraid_store_log_level
,
4164 * pmcraid_show_drv_version - Display driver version
4165 * @dev: class device struct
4169 * number of bytes printed to buffer
4171 static ssize_t
pmcraid_show_drv_version(
4173 struct device_attribute
*attr
,
4177 return snprintf(buf
, PAGE_SIZE
, "version: %s\n",
4178 PMCRAID_DRIVER_VERSION
);
4181 static struct device_attribute pmcraid_driver_version_attr
= {
4183 .name
= "drv_version",
4186 .show
= pmcraid_show_drv_version
,
4190 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4191 * @dev: class device struct
4195 * number of bytes printed to buffer
4197 static ssize_t
pmcraid_show_adapter_id(
4199 struct device_attribute
*attr
,
4203 struct Scsi_Host
*shost
= class_to_shost(dev
);
4204 struct pmcraid_instance
*pinstance
=
4205 (struct pmcraid_instance
*)shost
->hostdata
;
4206 u32 adapter_id
= (pinstance
->pdev
->bus
->number
<< 8) |
4207 pinstance
->pdev
->devfn
;
4208 u32 aen_group
= pmcraid_event_family
.id
;
4210 return snprintf(buf
, PAGE_SIZE
,
4211 "adapter id: %d\nminor: %d\naen group: %d\n",
4212 adapter_id
, MINOR(pinstance
->cdev
.dev
), aen_group
);
4215 static struct device_attribute pmcraid_adapter_id_attr
= {
4217 .name
= "adapter_id",
4220 .show
= pmcraid_show_adapter_id
,
4223 static struct device_attribute
*pmcraid_host_attrs
[] = {
4224 &pmcraid_log_level_attr
,
4225 &pmcraid_driver_version_attr
,
4226 &pmcraid_adapter_id_attr
,
4231 /* host template structure for pmcraid driver */
4232 static struct scsi_host_template pmcraid_host_template
= {
4233 .module
= THIS_MODULE
,
4234 .name
= PMCRAID_DRIVER_NAME
,
4235 .queuecommand
= pmcraid_queuecommand
,
4236 .eh_abort_handler
= pmcraid_eh_abort_handler
,
4237 .eh_bus_reset_handler
= pmcraid_eh_bus_reset_handler
,
4238 .eh_target_reset_handler
= pmcraid_eh_target_reset_handler
,
4239 .eh_device_reset_handler
= pmcraid_eh_device_reset_handler
,
4240 .eh_host_reset_handler
= pmcraid_eh_host_reset_handler
,
4242 .slave_alloc
= pmcraid_slave_alloc
,
4243 .slave_configure
= pmcraid_slave_configure
,
4244 .slave_destroy
= pmcraid_slave_destroy
,
4245 .change_queue_depth
= pmcraid_change_queue_depth
,
4246 .can_queue
= PMCRAID_MAX_IO_CMD
,
4248 .sg_tablesize
= PMCRAID_MAX_IOADLS
,
4249 .max_sectors
= PMCRAID_IOA_MAX_SECTORS
,
4251 .cmd_per_lun
= PMCRAID_MAX_CMD_PER_LUN
,
4252 .use_clustering
= ENABLE_CLUSTERING
,
4253 .shost_attrs
= pmcraid_host_attrs
,
4254 .proc_name
= PMCRAID_DRIVER_NAME
,
4258 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4259 * @irq: interrupt vector number
4260 * @dev_id: pointer hrrq_vector
4263 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4266 static irqreturn_t
pmcraid_isr_msix(int irq
, void *dev_id
)
4268 struct pmcraid_isr_param
*hrrq_vector
;
4269 struct pmcraid_instance
*pinstance
;
4270 unsigned long lock_flags
;
4274 hrrq_vector
= (struct pmcraid_isr_param
*)dev_id
;
4275 hrrq_id
= hrrq_vector
->hrrq_id
;
4276 pinstance
= hrrq_vector
->drv_inst
;
4279 /* Read the interrupt */
4280 intrs_val
= pmcraid_read_interrupts(pinstance
);
4282 ((ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
)
4283 & DOORBELL_INTR_MSIX_CLR
) == 0)) {
4284 /* Any error interrupts including unit_check,
4285 * initiate IOA reset.In case of unit check indicate
4286 * to reset_sequence that IOA unit checked and prepare
4287 * for a dump during reset sequence
4289 if (intrs_val
& PMCRAID_ERROR_INTERRUPTS
) {
4290 if (intrs_val
& INTRS_IOA_UNIT_CHECK
)
4291 pinstance
->ioa_unit_check
= 1;
4293 pmcraid_err("ISR: error interrupts: %x \
4294 initiating reset\n", intrs_val
);
4295 spin_lock_irqsave(pinstance
->host
->host_lock
,
4297 pmcraid_initiate_reset(pinstance
);
4298 spin_unlock_irqrestore(
4299 pinstance
->host
->host_lock
,
4302 /* If interrupt was as part of the ioa initialization,
4303 * clear it. Delete the timer and wakeup the
4304 * reset engine to proceed with reset sequence
4306 if (intrs_val
& INTRS_TRANSITION_TO_OPERATIONAL
)
4307 pmcraid_clr_trans_op(pinstance
);
4309 /* Clear the interrupt register by writing
4310 * to host to ioa doorbell. Once done
4311 * FW will clear the interrupt.
4313 iowrite32(DOORBELL_INTR_MSIX_CLR
,
4314 pinstance
->int_regs
.host_ioa_interrupt_reg
);
4315 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
4321 tasklet_schedule(&(pinstance
->isr_tasklet
[hrrq_id
]));
4327 * pmcraid_isr - implements legacy interrupt handling routine
4329 * @irq: interrupt vector number
4330 * @dev_id: pointer hrrq_vector
4333 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4335 static irqreturn_t
pmcraid_isr(int irq
, void *dev_id
)
4337 struct pmcraid_isr_param
*hrrq_vector
;
4338 struct pmcraid_instance
*pinstance
;
4340 unsigned long lock_flags
;
4343 /* In case of legacy interrupt mode where interrupts are shared across
4344 * isrs, it may be possible that the current interrupt is not from IOA
4347 printk(KERN_INFO
"%s(): NULL host pointer\n", __func__
);
4350 hrrq_vector
= (struct pmcraid_isr_param
*)dev_id
;
4351 pinstance
= hrrq_vector
->drv_inst
;
4353 intrs
= pmcraid_read_interrupts(pinstance
);
4355 if (unlikely((intrs
& PMCRAID_PCI_INTERRUPTS
) == 0))
4358 /* Any error interrupts including unit_check, initiate IOA reset.
4359 * In case of unit check indicate to reset_sequence that IOA unit
4360 * checked and prepare for a dump during reset sequence
4362 if (intrs
& PMCRAID_ERROR_INTERRUPTS
) {
4364 if (intrs
& INTRS_IOA_UNIT_CHECK
)
4365 pinstance
->ioa_unit_check
= 1;
4368 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4369 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4372 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4373 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
4374 pmcraid_initiate_reset(pinstance
);
4375 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
4377 /* If interrupt was as part of the ioa initialization,
4378 * clear. Delete the timer and wakeup the
4379 * reset engine to proceed with reset sequence
4381 if (intrs
& INTRS_TRANSITION_TO_OPERATIONAL
) {
4382 pmcraid_clr_trans_op(pinstance
);
4385 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4387 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4390 &(pinstance
->isr_tasklet
[hrrq_id
]));
4399 * pmcraid_worker_function - worker thread function
4401 * @workp: pointer to struct work queue
4407 static void pmcraid_worker_function(struct work_struct
*workp
)
4409 struct pmcraid_instance
*pinstance
;
4410 struct pmcraid_resource_entry
*res
;
4411 struct pmcraid_resource_entry
*temp
;
4412 struct scsi_device
*sdev
;
4413 unsigned long lock_flags
;
4414 unsigned long host_lock_flags
;
4416 u8 bus
, target
, lun
;
4418 pinstance
= container_of(workp
, struct pmcraid_instance
, worker_q
);
4419 /* add resources only after host is added into system */
4420 if (!atomic_read(&pinstance
->expose_resources
))
4423 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
4425 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
4426 list_for_each_entry_safe(res
, temp
, &pinstance
->used_res_q
, queue
) {
4428 if (res
->change_detected
== RES_CHANGE_DEL
&& res
->scsi_dev
) {
4429 sdev
= res
->scsi_dev
;
4431 /* host_lock must be held before calling
4434 spin_lock_irqsave(pinstance
->host
->host_lock
,
4436 if (!scsi_device_get(sdev
)) {
4437 spin_unlock_irqrestore(
4438 pinstance
->host
->host_lock
,
4440 pmcraid_info("deleting %x from midlayer\n",
4441 res
->cfg_entry
.resource_address
);
4442 list_move_tail(&res
->queue
,
4443 &pinstance
->free_res_q
);
4444 spin_unlock_irqrestore(
4445 &pinstance
->resource_lock
,
4447 scsi_remove_device(sdev
);
4448 scsi_device_put(sdev
);
4449 spin_lock_irqsave(&pinstance
->resource_lock
,
4451 res
->change_detected
= 0;
4453 spin_unlock_irqrestore(
4454 pinstance
->host
->host_lock
,
4460 list_for_each_entry(res
, &pinstance
->used_res_q
, queue
) {
4462 if (res
->change_detected
== RES_CHANGE_ADD
) {
4464 if (!pmcraid_expose_resource(fw_version
,
4468 if (RES_IS_VSET(res
->cfg_entry
)) {
4469 bus
= PMCRAID_VSET_BUS_ID
;
4470 if (fw_version
<= PMCRAID_FW_VERSION_1
)
4471 target
= res
->cfg_entry
.unique_flags1
;
4473 target
= res
->cfg_entry
.array_id
& 0xFF;
4474 lun
= PMCRAID_VSET_LUN_ID
;
4476 bus
= PMCRAID_PHYS_BUS_ID
;
4479 res
->cfg_entry
.resource_address
);
4480 lun
= RES_LUN(res
->cfg_entry
.resource_address
);
4483 res
->change_detected
= 0;
4484 spin_unlock_irqrestore(&pinstance
->resource_lock
,
4486 scsi_add_device(pinstance
->host
, bus
, target
, lun
);
4487 spin_lock_irqsave(&pinstance
->resource_lock
,
4492 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
4496 * pmcraid_tasklet_function - Tasklet function
4498 * @instance: pointer to msix param structure
4503 static void pmcraid_tasklet_function(unsigned long instance
)
4505 struct pmcraid_isr_param
*hrrq_vector
;
4506 struct pmcraid_instance
*pinstance
;
4507 unsigned long hrrq_lock_flags
;
4508 unsigned long pending_lock_flags
;
4509 unsigned long host_lock_flags
;
4510 spinlock_t
*lockp
; /* hrrq buffer lock */
4514 hrrq_vector
= (struct pmcraid_isr_param
*)instance
;
4515 pinstance
= hrrq_vector
->drv_inst
;
4516 id
= hrrq_vector
->hrrq_id
;
4517 lockp
= &(pinstance
->hrrq_lock
[id
]);
4519 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4520 * protected by its own lock. Traversals must be done within this lock
4521 * as there may be multiple tasklets running on multiple CPUs. Note
4522 * that the lock is held just for picking up the response handle and
4523 * manipulating hrrq_curr/toggle_bit values.
4525 spin_lock_irqsave(lockp
, hrrq_lock_flags
);
4527 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4529 while ((resp
& HRRQ_TOGGLE_BIT
) ==
4530 pinstance
->host_toggle_bit
[id
]) {
4532 int cmd_index
= resp
>> 2;
4533 struct pmcraid_cmd
*cmd
= NULL
;
4535 if (pinstance
->hrrq_curr
[id
] < pinstance
->hrrq_end
[id
]) {
4536 pinstance
->hrrq_curr
[id
]++;
4538 pinstance
->hrrq_curr
[id
] = pinstance
->hrrq_start
[id
];
4539 pinstance
->host_toggle_bit
[id
] ^= 1u;
4542 if (cmd_index
>= PMCRAID_MAX_CMD
) {
4543 /* In case of invalid response handle, log message */
4544 pmcraid_err("Invalid response handle %d\n", cmd_index
);
4545 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4549 cmd
= pinstance
->cmd_list
[cmd_index
];
4550 spin_unlock_irqrestore(lockp
, hrrq_lock_flags
);
4552 spin_lock_irqsave(&pinstance
->pending_pool_lock
,
4553 pending_lock_flags
);
4554 list_del(&cmd
->free_list
);
4555 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
,
4556 pending_lock_flags
);
4557 del_timer(&cmd
->timer
);
4558 atomic_dec(&pinstance
->outstanding_cmds
);
4560 if (cmd
->cmd_done
== pmcraid_ioa_reset
) {
4561 spin_lock_irqsave(pinstance
->host
->host_lock
,
4564 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
4566 } else if (cmd
->cmd_done
!= NULL
) {
4569 /* loop over until we are done with all responses */
4570 spin_lock_irqsave(lockp
, hrrq_lock_flags
);
4571 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4574 spin_unlock_irqrestore(lockp
, hrrq_lock_flags
);
4578 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4579 * @pinstance: pointer to adapter instance structure
4581 * This routine un-registers registered interrupt handler and
4582 * also frees irqs/vectors.
4588 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance
*pinstance
)
4590 struct pci_dev
*pdev
= pinstance
->pdev
;
4593 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
4594 free_irq(pci_irq_vector(pdev
, i
), &pinstance
->hrrq_vector
[i
]);
4596 pinstance
->interrupt_mode
= 0;
4597 pci_free_irq_vectors(pdev
);
4601 * pmcraid_register_interrupt_handler - registers interrupt handler
4602 * @pinstance: pointer to per-adapter instance structure
4605 * 0 on success, non-zero error code otherwise.
4608 pmcraid_register_interrupt_handler(struct pmcraid_instance
*pinstance
)
4610 struct pci_dev
*pdev
= pinstance
->pdev
;
4611 unsigned int irq_flag
= PCI_IRQ_LEGACY
, flag
;
4612 int num_hrrq
, rc
, i
;
4615 if (pmcraid_enable_msix
)
4616 irq_flag
|= PCI_IRQ_MSIX
;
4618 num_hrrq
= pci_alloc_irq_vectors(pdev
, 1, PMCRAID_NUM_MSIX_VECTORS
,
4623 if (pdev
->msix_enabled
) {
4625 isr
= pmcraid_isr_msix
;
4631 for (i
= 0; i
< num_hrrq
; i
++) {
4632 struct pmcraid_isr_param
*vec
= &pinstance
->hrrq_vector
[i
];
4635 vec
->drv_inst
= pinstance
;
4636 rc
= request_irq(pci_irq_vector(pdev
, i
), isr
, flag
,
4637 PMCRAID_DRIVER_NAME
, vec
);
4642 pinstance
->num_hrrq
= num_hrrq
;
4643 if (pdev
->msix_enabled
) {
4644 pinstance
->interrupt_mode
= 1;
4645 iowrite32(DOORBELL_INTR_MODE_MSIX
,
4646 pinstance
->int_regs
.host_ioa_interrupt_reg
);
4647 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
4654 free_irq(pci_irq_vector(pdev
, i
), &pinstance
->hrrq_vector
[i
]);
4655 pci_free_irq_vectors(pdev
);
4660 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4661 * @pinstance: per adapter instance structure pointer
4662 * @max_index: number of buffer blocks to release
4668 pmcraid_release_cmd_blocks(struct pmcraid_instance
*pinstance
, int max_index
)
4671 for (i
= 0; i
< max_index
; i
++) {
4672 kmem_cache_free(pinstance
->cmd_cachep
, pinstance
->cmd_list
[i
]);
4673 pinstance
->cmd_list
[i
] = NULL
;
4675 kmem_cache_destroy(pinstance
->cmd_cachep
);
4676 pinstance
->cmd_cachep
= NULL
;
4680 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4681 * @pinstance: pointer to per adapter instance structure
4682 * @max_index: number of buffers (from 0 onwards) to release
4684 * This function assumes that the command blocks for which control blocks are
4685 * linked are not released.
4691 pmcraid_release_control_blocks(
4692 struct pmcraid_instance
*pinstance
,
4698 if (pinstance
->control_pool
== NULL
)
4701 for (i
= 0; i
< max_index
; i
++) {
4702 pci_pool_free(pinstance
->control_pool
,
4703 pinstance
->cmd_list
[i
]->ioa_cb
,
4704 pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
);
4705 pinstance
->cmd_list
[i
]->ioa_cb
= NULL
;
4706 pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
= 0;
4708 pci_pool_destroy(pinstance
->control_pool
);
4709 pinstance
->control_pool
= NULL
;
4713 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4714 * @pinstance - pointer to per adapter instance structure
4716 * Allocates memory for command blocks using kernel slab allocator.
4719 * 0 in case of success; -ENOMEM in case of failure
4721 static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance
*pinstance
)
4725 sprintf(pinstance
->cmd_pool_name
, "pmcraid_cmd_pool_%d",
4726 pinstance
->host
->unique_id
);
4729 pinstance
->cmd_cachep
= kmem_cache_create(
4730 pinstance
->cmd_pool_name
,
4731 sizeof(struct pmcraid_cmd
), 0,
4732 SLAB_HWCACHE_ALIGN
, NULL
);
4733 if (!pinstance
->cmd_cachep
)
4736 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
4737 pinstance
->cmd_list
[i
] =
4738 kmem_cache_alloc(pinstance
->cmd_cachep
, GFP_KERNEL
);
4739 if (!pinstance
->cmd_list
[i
]) {
4740 pmcraid_release_cmd_blocks(pinstance
, i
);
4748 * pmcraid_allocate_control_blocks - allocates memory control blocks
4749 * @pinstance : pointer to per adapter instance structure
4751 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4752 * and IOASAs. This is called after command blocks are already allocated.
4755 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4757 static int pmcraid_allocate_control_blocks(struct pmcraid_instance
*pinstance
)
4761 sprintf(pinstance
->ctl_pool_name
, "pmcraid_control_pool_%d",
4762 pinstance
->host
->unique_id
);
4764 pinstance
->control_pool
=
4765 pci_pool_create(pinstance
->ctl_pool_name
,
4767 sizeof(struct pmcraid_control_block
),
4768 PMCRAID_IOARCB_ALIGNMENT
, 0);
4770 if (!pinstance
->control_pool
)
4773 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
4774 pinstance
->cmd_list
[i
]->ioa_cb
=
4776 pinstance
->control_pool
,
4778 &(pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
));
4780 if (!pinstance
->cmd_list
[i
]->ioa_cb
) {
4781 pmcraid_release_control_blocks(pinstance
, i
);
4784 memset(pinstance
->cmd_list
[i
]->ioa_cb
, 0,
4785 sizeof(struct pmcraid_control_block
));
4791 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4792 * @pinstance: pointer to per adapter instance structure
4793 * @maxindex: size of hrrq buffer pointer array
4799 pmcraid_release_host_rrqs(struct pmcraid_instance
*pinstance
, int maxindex
)
4802 for (i
= 0; i
< maxindex
; i
++) {
4804 pci_free_consistent(pinstance
->pdev
,
4805 HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
,
4806 pinstance
->hrrq_start
[i
],
4807 pinstance
->hrrq_start_bus_addr
[i
]);
4809 /* reset pointers and toggle bit to zeros */
4810 pinstance
->hrrq_start
[i
] = NULL
;
4811 pinstance
->hrrq_start_bus_addr
[i
] = 0;
4812 pinstance
->host_toggle_bit
[i
] = 0;
4817 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4818 * @pinstance: pointer to per adapter instance structure
4821 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4823 static int pmcraid_allocate_host_rrqs(struct pmcraid_instance
*pinstance
)
4827 buffer_size
= HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
;
4829 for (i
= 0; i
< pinstance
->num_hrrq
; i
++) {
4830 pinstance
->hrrq_start
[i
] =
4831 pci_alloc_consistent(
4834 &(pinstance
->hrrq_start_bus_addr
[i
]));
4836 if (pinstance
->hrrq_start
[i
] == 0) {
4837 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4839 pmcraid_release_host_rrqs(pinstance
, i
);
4843 memset(pinstance
->hrrq_start
[i
], 0, buffer_size
);
4844 pinstance
->hrrq_curr
[i
] = pinstance
->hrrq_start
[i
];
4845 pinstance
->hrrq_end
[i
] =
4846 pinstance
->hrrq_start
[i
] + PMCRAID_MAX_CMD
- 1;
4847 pinstance
->host_toggle_bit
[i
] = 1;
4848 spin_lock_init(&pinstance
->hrrq_lock
[i
]);
4854 * pmcraid_release_hcams - release HCAM buffers
4856 * @pinstance: pointer to per adapter instance structure
4861 static void pmcraid_release_hcams(struct pmcraid_instance
*pinstance
)
4863 if (pinstance
->ccn
.msg
!= NULL
) {
4864 pci_free_consistent(pinstance
->pdev
,
4865 PMCRAID_AEN_HDR_SIZE
+
4866 sizeof(struct pmcraid_hcam_ccn_ext
),
4868 pinstance
->ccn
.baddr
);
4870 pinstance
->ccn
.msg
= NULL
;
4871 pinstance
->ccn
.hcam
= NULL
;
4872 pinstance
->ccn
.baddr
= 0;
4875 if (pinstance
->ldn
.msg
!= NULL
) {
4876 pci_free_consistent(pinstance
->pdev
,
4877 PMCRAID_AEN_HDR_SIZE
+
4878 sizeof(struct pmcraid_hcam_ldn
),
4880 pinstance
->ldn
.baddr
);
4882 pinstance
->ldn
.msg
= NULL
;
4883 pinstance
->ldn
.hcam
= NULL
;
4884 pinstance
->ldn
.baddr
= 0;
4889 * pmcraid_allocate_hcams - allocates HCAM buffers
4890 * @pinstance : pointer to per adapter instance structure
4893 * 0 in case of successful allocation, non-zero otherwise
4895 static int pmcraid_allocate_hcams(struct pmcraid_instance
*pinstance
)
4897 pinstance
->ccn
.msg
= pci_alloc_consistent(
4899 PMCRAID_AEN_HDR_SIZE
+
4900 sizeof(struct pmcraid_hcam_ccn_ext
),
4901 &(pinstance
->ccn
.baddr
));
4903 pinstance
->ldn
.msg
= pci_alloc_consistent(
4905 PMCRAID_AEN_HDR_SIZE
+
4906 sizeof(struct pmcraid_hcam_ldn
),
4907 &(pinstance
->ldn
.baddr
));
4909 if (pinstance
->ldn
.msg
== NULL
|| pinstance
->ccn
.msg
== NULL
) {
4910 pmcraid_release_hcams(pinstance
);
4912 pinstance
->ccn
.hcam
=
4913 (void *)pinstance
->ccn
.msg
+ PMCRAID_AEN_HDR_SIZE
;
4914 pinstance
->ldn
.hcam
=
4915 (void *)pinstance
->ldn
.msg
+ PMCRAID_AEN_HDR_SIZE
;
4917 atomic_set(&pinstance
->ccn
.ignore
, 0);
4918 atomic_set(&pinstance
->ldn
.ignore
, 0);
4921 return (pinstance
->ldn
.msg
== NULL
) ? -ENOMEM
: 0;
4925 * pmcraid_release_config_buffers - release config.table buffers
4926 * @pinstance: pointer to per adapter instance structure
4931 static void pmcraid_release_config_buffers(struct pmcraid_instance
*pinstance
)
4933 if (pinstance
->cfg_table
!= NULL
&&
4934 pinstance
->cfg_table_bus_addr
!= 0) {
4935 pci_free_consistent(pinstance
->pdev
,
4936 sizeof(struct pmcraid_config_table
),
4937 pinstance
->cfg_table
,
4938 pinstance
->cfg_table_bus_addr
);
4939 pinstance
->cfg_table
= NULL
;
4940 pinstance
->cfg_table_bus_addr
= 0;
4943 if (pinstance
->res_entries
!= NULL
) {
4946 for (i
= 0; i
< PMCRAID_MAX_RESOURCES
; i
++)
4947 list_del(&pinstance
->res_entries
[i
].queue
);
4948 kfree(pinstance
->res_entries
);
4949 pinstance
->res_entries
= NULL
;
4952 pmcraid_release_hcams(pinstance
);
4956 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
4957 * @pinstance : pointer to per adapter instance structure
4960 * 0 for successful allocation, -ENOMEM for any failure
4962 static int pmcraid_allocate_config_buffers(struct pmcraid_instance
*pinstance
)
4966 pinstance
->res_entries
=
4967 kzalloc(sizeof(struct pmcraid_resource_entry
) *
4968 PMCRAID_MAX_RESOURCES
, GFP_KERNEL
);
4970 if (NULL
== pinstance
->res_entries
) {
4971 pmcraid_err("failed to allocate memory for resource table\n");
4975 for (i
= 0; i
< PMCRAID_MAX_RESOURCES
; i
++)
4976 list_add_tail(&pinstance
->res_entries
[i
].queue
,
4977 &pinstance
->free_res_q
);
4979 pinstance
->cfg_table
=
4980 pci_alloc_consistent(pinstance
->pdev
,
4981 sizeof(struct pmcraid_config_table
),
4982 &pinstance
->cfg_table_bus_addr
);
4984 if (NULL
== pinstance
->cfg_table
) {
4985 pmcraid_err("couldn't alloc DMA memory for config table\n");
4986 pmcraid_release_config_buffers(pinstance
);
4990 if (pmcraid_allocate_hcams(pinstance
)) {
4991 pmcraid_err("could not alloc DMA memory for HCAMS\n");
4992 pmcraid_release_config_buffers(pinstance
);
5000 * pmcraid_init_tasklets - registers tasklets for response handling
5002 * @pinstance: pointer adapter instance structure
5007 static void pmcraid_init_tasklets(struct pmcraid_instance
*pinstance
)
5010 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
5011 tasklet_init(&pinstance
->isr_tasklet
[i
],
5012 pmcraid_tasklet_function
,
5013 (unsigned long)&pinstance
->hrrq_vector
[i
]);
5017 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5019 * @pinstance: pointer to adapter instance structure
5024 static void pmcraid_kill_tasklets(struct pmcraid_instance
*pinstance
)
5027 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
5028 tasklet_kill(&pinstance
->isr_tasklet
[i
]);
5032 * pmcraid_release_buffers - release per-adapter buffers allocated
5034 * @pinstance: pointer to adapter soft state
5039 static void pmcraid_release_buffers(struct pmcraid_instance
*pinstance
)
5041 pmcraid_release_config_buffers(pinstance
);
5042 pmcraid_release_control_blocks(pinstance
, PMCRAID_MAX_CMD
);
5043 pmcraid_release_cmd_blocks(pinstance
, PMCRAID_MAX_CMD
);
5044 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5046 if (pinstance
->inq_data
!= NULL
) {
5047 pci_free_consistent(pinstance
->pdev
,
5048 sizeof(struct pmcraid_inquiry_data
),
5049 pinstance
->inq_data
,
5050 pinstance
->inq_data_baddr
);
5052 pinstance
->inq_data
= NULL
;
5053 pinstance
->inq_data_baddr
= 0;
5056 if (pinstance
->timestamp_data
!= NULL
) {
5057 pci_free_consistent(pinstance
->pdev
,
5058 sizeof(struct pmcraid_timestamp_data
),
5059 pinstance
->timestamp_data
,
5060 pinstance
->timestamp_data_baddr
);
5062 pinstance
->timestamp_data
= NULL
;
5063 pinstance
->timestamp_data_baddr
= 0;
5068 * pmcraid_init_buffers - allocates memory and initializes various structures
5069 * @pinstance: pointer to per adapter instance structure
5071 * This routine pre-allocates memory based on the type of block as below:
5072 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5073 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5074 * config-table entries : DMAable memory using pci_alloc_consistent
5075 * HostRRQs : DMAable memory, using pci_alloc_consistent
5078 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5080 static int pmcraid_init_buffers(struct pmcraid_instance
*pinstance
)
5084 if (pmcraid_allocate_host_rrqs(pinstance
)) {
5085 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5086 pinstance
->num_hrrq
);
5090 if (pmcraid_allocate_config_buffers(pinstance
)) {
5091 pmcraid_err("couldn't allocate memory for config buffers\n");
5092 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5096 if (pmcraid_allocate_cmd_blocks(pinstance
)) {
5097 pmcraid_err("couldn't allocate memory for cmd blocks\n");
5098 pmcraid_release_config_buffers(pinstance
);
5099 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5103 if (pmcraid_allocate_control_blocks(pinstance
)) {
5104 pmcraid_err("couldn't allocate memory control blocks\n");
5105 pmcraid_release_config_buffers(pinstance
);
5106 pmcraid_release_cmd_blocks(pinstance
, PMCRAID_MAX_CMD
);
5107 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5111 /* allocate DMAable memory for page D0 INQUIRY buffer */
5112 pinstance
->inq_data
= pci_alloc_consistent(
5114 sizeof(struct pmcraid_inquiry_data
),
5115 &pinstance
->inq_data_baddr
);
5117 if (pinstance
->inq_data
== NULL
) {
5118 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5119 pmcraid_release_buffers(pinstance
);
5123 /* allocate DMAable memory for set timestamp data buffer */
5124 pinstance
->timestamp_data
= pci_alloc_consistent(
5126 sizeof(struct pmcraid_timestamp_data
),
5127 &pinstance
->timestamp_data_baddr
);
5129 if (pinstance
->timestamp_data
== NULL
) {
5130 pmcraid_err("couldn't allocate DMA memory for \
5131 set time_stamp \n");
5132 pmcraid_release_buffers(pinstance
);
5137 /* Initialize all the command blocks and add them to free pool. No
5138 * need to lock (free_pool_lock) as this is done in initialization
5141 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
5142 struct pmcraid_cmd
*cmdp
= pinstance
->cmd_list
[i
];
5143 pmcraid_init_cmdblk(cmdp
, i
);
5144 cmdp
->drv_inst
= pinstance
;
5145 list_add_tail(&cmdp
->free_list
, &pinstance
->free_cmd_pool
);
5152 * pmcraid_reinit_buffers - resets various buffer pointers
5153 * @pinstance: pointer to adapter instance
5157 static void pmcraid_reinit_buffers(struct pmcraid_instance
*pinstance
)
5160 int buffer_size
= HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
;
5162 for (i
= 0; i
< pinstance
->num_hrrq
; i
++) {
5163 memset(pinstance
->hrrq_start
[i
], 0, buffer_size
);
5164 pinstance
->hrrq_curr
[i
] = pinstance
->hrrq_start
[i
];
5165 pinstance
->hrrq_end
[i
] =
5166 pinstance
->hrrq_start
[i
] + PMCRAID_MAX_CMD
- 1;
5167 pinstance
->host_toggle_bit
[i
] = 1;
5172 * pmcraid_init_instance - initialize per instance data structure
5173 * @pdev: pointer to pci device structure
5174 * @host: pointer to Scsi_Host structure
5175 * @mapped_pci_addr: memory mapped IOA configuration registers
5178 * 0 on success, non-zero in case of any failure
5180 static int pmcraid_init_instance(struct pci_dev
*pdev
, struct Scsi_Host
*host
,
5181 void __iomem
*mapped_pci_addr
)
5183 struct pmcraid_instance
*pinstance
=
5184 (struct pmcraid_instance
*)host
->hostdata
;
5186 pinstance
->host
= host
;
5187 pinstance
->pdev
= pdev
;
5189 /* Initialize register addresses */
5190 pinstance
->mapped_dma_addr
= mapped_pci_addr
;
5192 /* Initialize chip-specific details */
5194 struct pmcraid_chip_details
*chip_cfg
= pinstance
->chip_cfg
;
5195 struct pmcraid_interrupts
*pint_regs
= &pinstance
->int_regs
;
5197 pinstance
->ioarrin
= mapped_pci_addr
+ chip_cfg
->ioarrin
;
5199 pint_regs
->ioa_host_interrupt_reg
=
5200 mapped_pci_addr
+ chip_cfg
->ioa_host_intr
;
5201 pint_regs
->ioa_host_interrupt_clr_reg
=
5202 mapped_pci_addr
+ chip_cfg
->ioa_host_intr_clr
;
5203 pint_regs
->ioa_host_msix_interrupt_reg
=
5204 mapped_pci_addr
+ chip_cfg
->ioa_host_msix_intr
;
5205 pint_regs
->host_ioa_interrupt_reg
=
5206 mapped_pci_addr
+ chip_cfg
->host_ioa_intr
;
5207 pint_regs
->host_ioa_interrupt_clr_reg
=
5208 mapped_pci_addr
+ chip_cfg
->host_ioa_intr_clr
;
5210 /* Current version of firmware exposes interrupt mask set
5211 * and mask clr registers through memory mapped bar0.
5213 pinstance
->mailbox
= mapped_pci_addr
+ chip_cfg
->mailbox
;
5214 pinstance
->ioa_status
= mapped_pci_addr
+ chip_cfg
->ioastatus
;
5215 pint_regs
->ioa_host_interrupt_mask_reg
=
5216 mapped_pci_addr
+ chip_cfg
->ioa_host_mask
;
5217 pint_regs
->ioa_host_interrupt_mask_clr_reg
=
5218 mapped_pci_addr
+ chip_cfg
->ioa_host_mask_clr
;
5219 pint_regs
->global_interrupt_mask_reg
=
5220 mapped_pci_addr
+ chip_cfg
->global_intr_mask
;
5223 pinstance
->ioa_reset_attempts
= 0;
5224 init_waitqueue_head(&pinstance
->reset_wait_q
);
5226 atomic_set(&pinstance
->outstanding_cmds
, 0);
5227 atomic_set(&pinstance
->last_message_id
, 0);
5228 atomic_set(&pinstance
->expose_resources
, 0);
5230 INIT_LIST_HEAD(&pinstance
->free_res_q
);
5231 INIT_LIST_HEAD(&pinstance
->used_res_q
);
5232 INIT_LIST_HEAD(&pinstance
->free_cmd_pool
);
5233 INIT_LIST_HEAD(&pinstance
->pending_cmd_pool
);
5235 spin_lock_init(&pinstance
->free_pool_lock
);
5236 spin_lock_init(&pinstance
->pending_pool_lock
);
5237 spin_lock_init(&pinstance
->resource_lock
);
5238 mutex_init(&pinstance
->aen_queue_lock
);
5240 /* Work-queue (Shared) for deferred processing error handling */
5241 INIT_WORK(&pinstance
->worker_q
, pmcraid_worker_function
);
5243 /* Initialize the default log_level */
5244 pinstance
->current_log_level
= pmcraid_log_level
;
5246 /* Setup variables required for reset engine */
5247 pinstance
->ioa_state
= IOA_STATE_UNKNOWN
;
5248 pinstance
->reset_cmd
= NULL
;
5253 * pmcraid_shutdown - shutdown adapter controller.
5254 * @pdev: pci device struct
5256 * Issues an adapter shutdown to the card waits for its completion
5261 static void pmcraid_shutdown(struct pci_dev
*pdev
)
5263 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5264 pmcraid_reset_bringdown(pinstance
);
5269 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5271 static unsigned short pmcraid_get_minor(void)
5275 minor
= find_first_zero_bit(pmcraid_minor
, sizeof(pmcraid_minor
));
5276 __set_bit(minor
, pmcraid_minor
);
5281 * pmcraid_release_minor - releases given minor back to minor number bitmap
5283 static void pmcraid_release_minor(unsigned short minor
)
5285 __clear_bit(minor
, pmcraid_minor
);
5289 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5291 * @pinstance: pointer to adapter instance for which to register device
5294 * 0 in case of success, otherwise non-zero
5296 static int pmcraid_setup_chrdev(struct pmcraid_instance
*pinstance
)
5301 minor
= pmcraid_get_minor();
5302 cdev_init(&pinstance
->cdev
, &pmcraid_fops
);
5303 pinstance
->cdev
.owner
= THIS_MODULE
;
5305 error
= cdev_add(&pinstance
->cdev
, MKDEV(pmcraid_major
, minor
), 1);
5308 pmcraid_release_minor(minor
);
5310 device_create(pmcraid_class
, NULL
, MKDEV(pmcraid_major
, minor
),
5311 NULL
, "%s%u", PMCRAID_DEVFILE
, minor
);
5316 * pmcraid_release_chrdev - unregisters per-adapter management interface
5318 * @pinstance: pointer to adapter instance structure
5323 static void pmcraid_release_chrdev(struct pmcraid_instance
*pinstance
)
5325 pmcraid_release_minor(MINOR(pinstance
->cdev
.dev
));
5326 device_destroy(pmcraid_class
,
5327 MKDEV(pmcraid_major
, MINOR(pinstance
->cdev
.dev
)));
5328 cdev_del(&pinstance
->cdev
);
5332 * pmcraid_remove - IOA hot plug remove entry point
5333 * @pdev: pci device struct
5338 static void pmcraid_remove(struct pci_dev
*pdev
)
5340 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5342 /* remove the management interface (/dev file) for this device */
5343 pmcraid_release_chrdev(pinstance
);
5345 /* remove host template from scsi midlayer */
5346 scsi_remove_host(pinstance
->host
);
5348 /* block requests from mid-layer */
5349 scsi_block_requests(pinstance
->host
);
5351 /* initiate shutdown adapter */
5352 pmcraid_shutdown(pdev
);
5354 pmcraid_disable_interrupts(pinstance
, ~0);
5355 flush_work(&pinstance
->worker_q
);
5357 pmcraid_kill_tasklets(pinstance
);
5358 pmcraid_unregister_interrupt_handler(pinstance
);
5359 pmcraid_release_buffers(pinstance
);
5360 iounmap(pinstance
->mapped_dma_addr
);
5361 pci_release_regions(pdev
);
5362 scsi_host_put(pinstance
->host
);
5363 pci_disable_device(pdev
);
5370 * pmcraid_suspend - driver suspend entry point for power management
5371 * @pdev: PCI device structure
5372 * @state: PCI power state to suspend routine
5374 * Return Value - 0 always
5376 static int pmcraid_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5378 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5380 pmcraid_shutdown(pdev
);
5381 pmcraid_disable_interrupts(pinstance
, ~0);
5382 pmcraid_kill_tasklets(pinstance
);
5383 pci_set_drvdata(pinstance
->pdev
, pinstance
);
5384 pmcraid_unregister_interrupt_handler(pinstance
);
5385 pci_save_state(pdev
);
5386 pci_disable_device(pdev
);
5387 pci_set_power_state(pdev
, pci_choose_state(pdev
, state
));
5393 * pmcraid_resume - driver resume entry point PCI power management
5394 * @pdev: PCI device structure
5396 * Return Value - 0 in case of success. Error code in case of any failure
5398 static int pmcraid_resume(struct pci_dev
*pdev
)
5400 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5401 struct Scsi_Host
*host
= pinstance
->host
;
5404 pci_set_power_state(pdev
, PCI_D0
);
5405 pci_enable_wake(pdev
, PCI_D0
, 0);
5406 pci_restore_state(pdev
);
5408 rc
= pci_enable_device(pdev
);
5411 dev_err(&pdev
->dev
, "resume: Enable device failed\n");
5415 pci_set_master(pdev
);
5417 if ((sizeof(dma_addr_t
) == 4) ||
5418 pci_set_dma_mask(pdev
, DMA_BIT_MASK(64)))
5419 rc
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
5422 rc
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
5425 dev_err(&pdev
->dev
, "resume: Failed to set PCI DMA mask\n");
5426 goto disable_device
;
5429 pmcraid_disable_interrupts(pinstance
, ~0);
5430 atomic_set(&pinstance
->outstanding_cmds
, 0);
5431 rc
= pmcraid_register_interrupt_handler(pinstance
);
5435 "resume: couldn't register interrupt handlers\n");
5440 pmcraid_init_tasklets(pinstance
);
5441 pmcraid_enable_interrupts(pinstance
, PMCRAID_PCI_INTERRUPTS
);
5443 /* Start with hard reset sequence which brings up IOA to operational
5444 * state as well as completes the reset sequence.
5446 pinstance
->ioa_hard_reset
= 1;
5448 /* Start IOA firmware initialization and bring card to Operational
5451 if (pmcraid_reset_bringup(pinstance
)) {
5452 dev_err(&pdev
->dev
, "couldn't initialize IOA\n");
5454 goto release_tasklets
;
5460 pmcraid_disable_interrupts(pinstance
, ~0);
5461 pmcraid_kill_tasklets(pinstance
);
5462 pmcraid_unregister_interrupt_handler(pinstance
);
5465 scsi_host_put(host
);
5468 pci_disable_device(pdev
);
5475 #define pmcraid_suspend NULL
5476 #define pmcraid_resume NULL
5478 #endif /* CONFIG_PM */
5481 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5482 * completion of the ioa reset
5483 * @cmd: pointer to reset command block
5485 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd
*cmd
)
5487 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5488 unsigned long flags
;
5490 spin_lock_irqsave(pinstance
->host
->host_lock
, flags
);
5491 pmcraid_ioa_reset(cmd
);
5492 spin_unlock_irqrestore(pinstance
->host
->host_lock
, flags
);
5493 scsi_unblock_requests(pinstance
->host
);
5494 schedule_work(&pinstance
->worker_q
);
5498 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5500 * @cmd: pointer to pmcraid_cmd structure
5503 * 0 for success or non-zero for failure cases
5505 static void pmcraid_set_supported_devs(struct pmcraid_cmd
*cmd
)
5507 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5508 void (*cmd_done
) (struct pmcraid_cmd
*) = pmcraid_complete_ioa_reset
;
5510 pmcraid_reinit_cmdblk(cmd
);
5512 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5513 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
5514 ioarcb
->cdb
[0] = PMCRAID_SET_SUPPORTED_DEVICES
;
5515 ioarcb
->cdb
[1] = ALL_DEVICES_SUPPORTED
;
5517 /* If this was called as part of resource table reinitialization due to
5518 * lost CCN, it is enough to return the command block back to free pool
5519 * as part of set_supported_devs completion function.
5521 if (cmd
->drv_inst
->reinit_cfg_table
) {
5522 cmd
->drv_inst
->reinit_cfg_table
= 0;
5524 cmd_done
= pmcraid_reinit_cfgtable_done
;
5527 /* we will be done with the reset sequence after set supported devices,
5528 * setup the done function to return the command block back to free
5531 pmcraid_send_cmd(cmd
,
5533 PMCRAID_SET_SUP_DEV_TIMEOUT
,
5534 pmcraid_timeout_handler
);
5539 * pmcraid_set_timestamp - set the timestamp to IOAFP
5541 * @cmd: pointer to pmcraid_cmd structure
5544 * 0 for success or non-zero for failure cases
5546 static void pmcraid_set_timestamp(struct pmcraid_cmd
*cmd
)
5548 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5549 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5550 __be32 time_stamp_len
= cpu_to_be32(PMCRAID_TIMESTAMP_LEN
);
5551 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
5555 timestamp
= ktime_get_real_seconds() * 1000;
5557 pinstance
->timestamp_data
->timestamp
[0] = (__u8
)(timestamp
);
5558 pinstance
->timestamp_data
->timestamp
[1] = (__u8
)((timestamp
) >> 8);
5559 pinstance
->timestamp_data
->timestamp
[2] = (__u8
)((timestamp
) >> 16);
5560 pinstance
->timestamp_data
->timestamp
[3] = (__u8
)((timestamp
) >> 24);
5561 pinstance
->timestamp_data
->timestamp
[4] = (__u8
)((timestamp
) >> 32);
5562 pinstance
->timestamp_data
->timestamp
[5] = (__u8
)((timestamp
) >> 40);
5564 pmcraid_reinit_cmdblk(cmd
);
5565 ioarcb
->request_type
= REQ_TYPE_SCSI
;
5566 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5567 ioarcb
->cdb
[0] = PMCRAID_SCSI_SET_TIMESTAMP
;
5568 ioarcb
->cdb
[1] = PMCRAID_SCSI_SERVICE_ACTION
;
5569 memcpy(&(ioarcb
->cdb
[6]), &time_stamp_len
, sizeof(time_stamp_len
));
5571 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
5572 offsetof(struct pmcraid_ioarcb
,
5573 add_data
.u
.ioadl
[0]));
5574 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
5575 ioarcb
->ioarcb_bus_addr
&= ~(0x1FULL
);
5577 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
5578 ioarcb
->request_flags0
|= TRANSFER_DIR_WRITE
;
5579 ioarcb
->data_transfer_length
=
5580 cpu_to_le32(sizeof(struct pmcraid_timestamp_data
));
5581 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
5582 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
5583 ioadl
->address
= cpu_to_le64(pinstance
->timestamp_data_baddr
);
5584 ioadl
->data_len
= cpu_to_le32(sizeof(struct pmcraid_timestamp_data
));
5586 if (!pinstance
->timestamp_error
) {
5587 pinstance
->timestamp_error
= 0;
5588 pmcraid_send_cmd(cmd
, pmcraid_set_supported_devs
,
5589 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5591 pmcraid_send_cmd(cmd
, pmcraid_return_cmd
,
5592 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5599 * pmcraid_init_res_table - Initialize the resource table
5600 * @cmd: pointer to pmcraid command struct
5602 * This function looks through the existing resource table, comparing
5603 * it with the config table. This function will take care of old/new
5604 * devices and schedule adding/removing them from the mid-layer
5610 static void pmcraid_init_res_table(struct pmcraid_cmd
*cmd
)
5612 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5613 struct pmcraid_resource_entry
*res
, *temp
;
5614 struct pmcraid_config_table_entry
*cfgte
;
5615 unsigned long lock_flags
;
5620 if (pinstance
->cfg_table
->flags
& MICROCODE_UPDATE_REQUIRED
)
5621 pmcraid_err("IOA requires microcode download\n");
5623 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
5625 /* resource list is protected by pinstance->resource_lock.
5626 * init_res_table can be called from probe (user-thread) or runtime
5627 * reset (timer/tasklet)
5629 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
5631 list_for_each_entry_safe(res
, temp
, &pinstance
->used_res_q
, queue
)
5632 list_move_tail(&res
->queue
, &old_res
);
5634 for (i
= 0; i
< pinstance
->cfg_table
->num_entries
; i
++) {
5635 if (be16_to_cpu(pinstance
->inq_data
->fw_version
) <=
5636 PMCRAID_FW_VERSION_1
)
5637 cfgte
= &pinstance
->cfg_table
->entries
[i
];
5639 cfgte
= (struct pmcraid_config_table_entry
*)
5640 &pinstance
->cfg_table
->entries_ext
[i
];
5642 if (!pmcraid_expose_resource(fw_version
, cfgte
))
5647 /* If this entry was already detected and initialized */
5648 list_for_each_entry_safe(res
, temp
, &old_res
, queue
) {
5650 rc
= memcmp(&res
->cfg_entry
.resource_address
,
5651 &cfgte
->resource_address
,
5652 sizeof(cfgte
->resource_address
));
5654 list_move_tail(&res
->queue
,
5655 &pinstance
->used_res_q
);
5661 /* If this is new entry, initialize it and add it the queue */
5664 if (list_empty(&pinstance
->free_res_q
)) {
5665 pmcraid_err("Too many devices attached\n");
5670 res
= list_entry(pinstance
->free_res_q
.next
,
5671 struct pmcraid_resource_entry
, queue
);
5673 res
->scsi_dev
= NULL
;
5674 res
->change_detected
= RES_CHANGE_ADD
;
5675 res
->reset_progress
= 0;
5676 list_move_tail(&res
->queue
, &pinstance
->used_res_q
);
5679 /* copy new configuration table entry details into driver
5680 * maintained resource entry
5683 memcpy(&res
->cfg_entry
, cfgte
,
5684 pinstance
->config_table_entry_size
);
5685 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5686 res
->cfg_entry
.resource_type
,
5687 (fw_version
<= PMCRAID_FW_VERSION_1
?
5688 res
->cfg_entry
.unique_flags1
:
5689 res
->cfg_entry
.array_id
& 0xFF),
5690 le32_to_cpu(res
->cfg_entry
.resource_address
));
5694 /* Detect any deleted entries, mark them for deletion from mid-layer */
5695 list_for_each_entry_safe(res
, temp
, &old_res
, queue
) {
5697 if (res
->scsi_dev
) {
5698 res
->change_detected
= RES_CHANGE_DEL
;
5699 res
->cfg_entry
.resource_handle
=
5700 PMCRAID_INVALID_RES_HANDLE
;
5701 list_move_tail(&res
->queue
, &pinstance
->used_res_q
);
5703 list_move_tail(&res
->queue
, &pinstance
->free_res_q
);
5707 /* release the resource list lock */
5708 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
5709 pmcraid_set_timestamp(cmd
);
5713 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5714 * @cmd: pointer pmcraid_cmd struct
5716 * This function sends a Query IOA Configuration command to the adapter to
5717 * retrieve the IOA configuration table.
5722 static void pmcraid_querycfg(struct pmcraid_cmd
*cmd
)
5724 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5725 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
5726 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5727 int cfg_table_size
= cpu_to_be32(sizeof(struct pmcraid_config_table
));
5729 if (be16_to_cpu(pinstance
->inq_data
->fw_version
) <=
5730 PMCRAID_FW_VERSION_1
)
5731 pinstance
->config_table_entry_size
=
5732 sizeof(struct pmcraid_config_table_entry
);
5734 pinstance
->config_table_entry_size
=
5735 sizeof(struct pmcraid_config_table_entry_ext
);
5737 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
5738 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5740 ioarcb
->cdb
[0] = PMCRAID_QUERY_IOA_CONFIG
;
5742 /* firmware requires 4-byte length field, specified in B.E format */
5743 memcpy(&(ioarcb
->cdb
[10]), &cfg_table_size
, sizeof(cfg_table_size
));
5745 /* Since entire config table can be described by single IOADL, it can
5746 * be part of IOARCB itself
5748 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
5749 offsetof(struct pmcraid_ioarcb
,
5750 add_data
.u
.ioadl
[0]));
5751 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
5752 ioarcb
->ioarcb_bus_addr
&= ~(0x1FULL
);
5754 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
5755 ioarcb
->data_transfer_length
=
5756 cpu_to_le32(sizeof(struct pmcraid_config_table
));
5758 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
5759 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
5760 ioadl
->address
= cpu_to_le64(pinstance
->cfg_table_bus_addr
);
5761 ioadl
->data_len
= cpu_to_le32(sizeof(struct pmcraid_config_table
));
5763 pmcraid_send_cmd(cmd
, pmcraid_init_res_table
,
5764 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5769 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5770 * @pdev: pointer to pci device structure
5771 * @dev_id: pointer to device ids structure
5774 * returns 0 if the device is claimed and successfully configured.
5775 * returns non-zero error code in case of any failure
5777 static int pmcraid_probe(struct pci_dev
*pdev
,
5778 const struct pci_device_id
*dev_id
)
5780 struct pmcraid_instance
*pinstance
;
5781 struct Scsi_Host
*host
;
5782 void __iomem
*mapped_pci_addr
;
5783 int rc
= PCIBIOS_SUCCESSFUL
;
5785 if (atomic_read(&pmcraid_adapter_count
) >= PMCRAID_MAX_ADAPTERS
) {
5787 ("maximum number(%d) of supported adapters reached\n",
5788 atomic_read(&pmcraid_adapter_count
));
5792 atomic_inc(&pmcraid_adapter_count
);
5793 rc
= pci_enable_device(pdev
);
5796 dev_err(&pdev
->dev
, "Cannot enable adapter\n");
5797 atomic_dec(&pmcraid_adapter_count
);
5801 dev_info(&pdev
->dev
,
5802 "Found new IOA(%x:%x), Total IOA count: %d\n",
5803 pdev
->vendor
, pdev
->device
,
5804 atomic_read(&pmcraid_adapter_count
));
5806 rc
= pci_request_regions(pdev
, PMCRAID_DRIVER_NAME
);
5810 "Couldn't register memory range of registers\n");
5811 goto out_disable_device
;
5814 mapped_pci_addr
= pci_iomap(pdev
, 0, 0);
5816 if (!mapped_pci_addr
) {
5817 dev_err(&pdev
->dev
, "Couldn't map PCI registers memory\n");
5819 goto out_release_regions
;
5822 pci_set_master(pdev
);
5824 /* Firmware requires the system bus address of IOARCB to be within
5825 * 32-bit addressable range though it has 64-bit IOARRIN register.
5826 * However, firmware supports 64-bit streaming DMA buffers, whereas
5827 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5828 * returns memory within 4GB (if not, change this logic), coherent
5829 * buffers are within firmware acceptable address ranges.
5831 if ((sizeof(dma_addr_t
) == 4) ||
5832 pci_set_dma_mask(pdev
, DMA_BIT_MASK(64)))
5833 rc
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
5835 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5836 * bit mask for pci_alloc_consistent to return addresses within 4GB
5839 rc
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
5842 dev_err(&pdev
->dev
, "Failed to set PCI DMA mask\n");
5846 host
= scsi_host_alloc(&pmcraid_host_template
,
5847 sizeof(struct pmcraid_instance
));
5850 dev_err(&pdev
->dev
, "scsi_host_alloc failed!\n");
5855 host
->max_id
= PMCRAID_MAX_NUM_TARGETS_PER_BUS
;
5856 host
->max_lun
= PMCRAID_MAX_NUM_LUNS_PER_TARGET
;
5857 host
->unique_id
= host
->host_no
;
5858 host
->max_channel
= PMCRAID_MAX_BUS_TO_SCAN
;
5859 host
->max_cmd_len
= PMCRAID_MAX_CDB_LEN
;
5861 /* zero out entire instance structure */
5862 pinstance
= (struct pmcraid_instance
*)host
->hostdata
;
5863 memset(pinstance
, 0, sizeof(*pinstance
));
5865 pinstance
->chip_cfg
=
5866 (struct pmcraid_chip_details
*)(dev_id
->driver_data
);
5868 rc
= pmcraid_init_instance(pdev
, host
, mapped_pci_addr
);
5871 dev_err(&pdev
->dev
, "failed to initialize adapter instance\n");
5872 goto out_scsi_host_put
;
5875 pci_set_drvdata(pdev
, pinstance
);
5877 /* Save PCI config-space for use following the reset */
5878 rc
= pci_save_state(pinstance
->pdev
);
5881 dev_err(&pdev
->dev
, "Failed to save PCI config space\n");
5882 goto out_scsi_host_put
;
5885 pmcraid_disable_interrupts(pinstance
, ~0);
5887 rc
= pmcraid_register_interrupt_handler(pinstance
);
5890 dev_err(&pdev
->dev
, "couldn't register interrupt handler\n");
5891 goto out_scsi_host_put
;
5894 pmcraid_init_tasklets(pinstance
);
5896 /* allocate verious buffers used by LLD.*/
5897 rc
= pmcraid_init_buffers(pinstance
);
5900 pmcraid_err("couldn't allocate memory blocks\n");
5901 goto out_unregister_isr
;
5904 /* check the reset type required */
5905 pmcraid_reset_type(pinstance
);
5907 pmcraid_enable_interrupts(pinstance
, PMCRAID_PCI_INTERRUPTS
);
5909 /* Start IOA firmware initialization and bring card to Operational
5912 pmcraid_info("starting IOA initialization sequence\n");
5913 if (pmcraid_reset_bringup(pinstance
)) {
5914 dev_err(&pdev
->dev
, "couldn't initialize IOA\n");
5916 goto out_release_bufs
;
5919 /* Add adapter instance into mid-layer list */
5920 rc
= scsi_add_host(pinstance
->host
, &pdev
->dev
);
5922 pmcraid_err("couldn't add host into mid-layer: %d\n", rc
);
5923 goto out_release_bufs
;
5926 scsi_scan_host(pinstance
->host
);
5928 rc
= pmcraid_setup_chrdev(pinstance
);
5931 pmcraid_err("couldn't create mgmt interface, error: %x\n",
5933 goto out_remove_host
;
5936 /* Schedule worker thread to handle CCN and take care of adding and
5937 * removing devices to OS
5939 atomic_set(&pinstance
->expose_resources
, 1);
5940 schedule_work(&pinstance
->worker_q
);
5944 scsi_remove_host(host
);
5947 pmcraid_release_buffers(pinstance
);
5950 pmcraid_kill_tasklets(pinstance
);
5951 pmcraid_unregister_interrupt_handler(pinstance
);
5954 scsi_host_put(host
);
5957 iounmap(mapped_pci_addr
);
5959 out_release_regions
:
5960 pci_release_regions(pdev
);
5963 atomic_dec(&pmcraid_adapter_count
);
5964 pci_disable_device(pdev
);
5969 * PCI driver structure of pcmraid driver
5971 static struct pci_driver pmcraid_driver
= {
5972 .name
= PMCRAID_DRIVER_NAME
,
5973 .id_table
= pmcraid_pci_table
,
5974 .probe
= pmcraid_probe
,
5975 .remove
= pmcraid_remove
,
5976 .suspend
= pmcraid_suspend
,
5977 .resume
= pmcraid_resume
,
5978 .shutdown
= pmcraid_shutdown
5982 * pmcraid_init - module load entry point
5984 static int __init
pmcraid_init(void)
5989 pmcraid_info("%s Device Driver version: %s\n",
5990 PMCRAID_DRIVER_NAME
, PMCRAID_DRIVER_VERSION
);
5992 error
= alloc_chrdev_region(&dev
, 0,
5993 PMCRAID_MAX_ADAPTERS
,
5997 pmcraid_err("failed to get a major number for adapters\n");
6001 pmcraid_major
= MAJOR(dev
);
6002 pmcraid_class
= class_create(THIS_MODULE
, PMCRAID_DEVFILE
);
6004 if (IS_ERR(pmcraid_class
)) {
6005 error
= PTR_ERR(pmcraid_class
);
6006 pmcraid_err("failed to register with sysfs, error = %x\n",
6008 goto out_unreg_chrdev
;
6011 error
= pmcraid_netlink_init();
6014 class_destroy(pmcraid_class
);
6015 goto out_unreg_chrdev
;
6018 error
= pci_register_driver(&pmcraid_driver
);
6023 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6025 class_destroy(pmcraid_class
);
6026 pmcraid_netlink_release();
6029 unregister_chrdev_region(MKDEV(pmcraid_major
, 0), PMCRAID_MAX_ADAPTERS
);
6036 * pmcraid_exit - module unload entry point
6038 static void __exit
pmcraid_exit(void)
6040 pmcraid_netlink_release();
6041 unregister_chrdev_region(MKDEV(pmcraid_major
, 0),
6042 PMCRAID_MAX_ADAPTERS
);
6043 pci_unregister_driver(&pmcraid_driver
);
6044 class_destroy(pmcraid_class
);
6047 module_init(pmcraid_init
);
6048 module_exit(pmcraid_exit
);