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 static 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
= le16_to_cpu(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
&= cpu_to_le64(~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
= NULL
;
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(le64_to_cpu(cmd
->ioa_cb
->ioarcb
.ioarcb_bus_addr
), pinstance
->ioarrin
);
905 * pmcraid_send_cmd - fires a command to IOA
907 * This function also sets up timeout function, and command completion
910 * @cmd: pointer to the command block to be fired to IOA
911 * @cmd_done: command completion function, called once IOA responds
912 * @timeout: timeout to wait for this command completion
913 * @timeout_func: timeout handler
918 static void pmcraid_send_cmd(
919 struct pmcraid_cmd
*cmd
,
920 void (*cmd_done
) (struct pmcraid_cmd
*),
921 unsigned long timeout
,
922 void (*timeout_func
) (struct pmcraid_cmd
*)
925 /* initialize done function */
926 cmd
->cmd_done
= cmd_done
;
929 /* setup timeout handler */
930 cmd
->timer
.data
= (unsigned long)cmd
;
931 cmd
->timer
.expires
= jiffies
+ timeout
;
932 cmd
->timer
.function
= (void (*)(unsigned long))timeout_func
;
933 add_timer(&cmd
->timer
);
936 /* fire the command to IOA */
937 _pmcraid_fire_command(cmd
);
941 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
942 * @cmd: pointer to the command block used for sending IOA shutdown command
947 static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd
*cmd
)
949 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
950 unsigned long lock_flags
;
952 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
953 pmcraid_ioa_reset(cmd
);
954 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
958 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
960 * @cmd: pointer to the command block used as part of reset sequence
965 static void pmcraid_ioa_shutdown(struct pmcraid_cmd
*cmd
)
967 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
968 cmd
->ioa_cb
->ioarcb
.cdb
[0],
969 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
971 /* Note that commands sent during reset require next command to be sent
972 * to IOA. Hence reinit the done function as well as timeout function
974 pmcraid_reinit_cmdblk(cmd
);
975 cmd
->ioa_cb
->ioarcb
.request_type
= REQ_TYPE_IOACMD
;
976 cmd
->ioa_cb
->ioarcb
.resource_handle
=
977 cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
978 cmd
->ioa_cb
->ioarcb
.cdb
[0] = PMCRAID_IOA_SHUTDOWN
;
979 cmd
->ioa_cb
->ioarcb
.cdb
[1] = PMCRAID_SHUTDOWN_NORMAL
;
981 /* fire shutdown command to hardware. */
982 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
983 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
));
985 pmcraid_notify_ioastate(cmd
->drv_inst
, PMC_DEVICE_EVENT_SHUTDOWN_START
);
987 pmcraid_send_cmd(cmd
, pmcraid_ioa_shutdown_done
,
988 PMCRAID_SHUTDOWN_TIMEOUT
,
989 pmcraid_timeout_handler
);
993 * pmcraid_get_fwversion_done - completion function for get_fwversion
995 * @cmd: pointer to command block used to send INQUIRY command
1000 static void pmcraid_querycfg(struct pmcraid_cmd
*);
1002 static void pmcraid_get_fwversion_done(struct pmcraid_cmd
*cmd
)
1004 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1005 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
1006 unsigned long lock_flags
;
1008 /* configuration table entry size depends on firmware version. If fw
1009 * version is not known, it is not possible to interpret IOA config
1013 pmcraid_err("IOA Inquiry failed with %x\n", ioasc
);
1014 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
1015 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
1016 pmcraid_reset_alert(cmd
);
1017 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
1019 pmcraid_querycfg(cmd
);
1024 * pmcraid_get_fwversion - reads firmware version information
1026 * @cmd: pointer to command block used to send INQUIRY command
1031 static void pmcraid_get_fwversion(struct pmcraid_cmd
*cmd
)
1033 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1034 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
1035 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1036 u16 data_size
= sizeof(struct pmcraid_inquiry_data
);
1038 pmcraid_reinit_cmdblk(cmd
);
1039 ioarcb
->request_type
= REQ_TYPE_SCSI
;
1040 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1041 ioarcb
->cdb
[0] = INQUIRY
;
1043 ioarcb
->cdb
[2] = 0xD0;
1044 ioarcb
->cdb
[3] = (data_size
>> 8) & 0xFF;
1045 ioarcb
->cdb
[4] = data_size
& 0xFF;
1047 /* Since entire inquiry data it can be part of IOARCB itself
1049 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
1050 offsetof(struct pmcraid_ioarcb
,
1051 add_data
.u
.ioadl
[0]));
1052 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
1053 ioarcb
->ioarcb_bus_addr
&= cpu_to_le64(~(0x1FULL
));
1055 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
1056 ioarcb
->data_transfer_length
= cpu_to_le32(data_size
);
1057 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
1058 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
1059 ioadl
->address
= cpu_to_le64(pinstance
->inq_data_baddr
);
1060 ioadl
->data_len
= cpu_to_le32(data_size
);
1062 pmcraid_send_cmd(cmd
, pmcraid_get_fwversion_done
,
1063 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
1067 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1068 * @cmd: pointer to command block to be used for identify hrrq
1073 static void pmcraid_identify_hrrq(struct pmcraid_cmd
*cmd
)
1075 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1076 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1077 int index
= cmd
->hrrq_index
;
1078 __be64 hrrq_addr
= cpu_to_be64(pinstance
->hrrq_start_bus_addr
[index
]);
1079 __be32 hrrq_size
= cpu_to_be32(sizeof(u32
) * PMCRAID_MAX_CMD
);
1080 void (*done_function
)(struct pmcraid_cmd
*);
1082 pmcraid_reinit_cmdblk(cmd
);
1083 cmd
->hrrq_index
= index
+ 1;
1085 if (cmd
->hrrq_index
< pinstance
->num_hrrq
) {
1086 done_function
= pmcraid_identify_hrrq
;
1088 cmd
->hrrq_index
= 0;
1089 done_function
= pmcraid_get_fwversion
;
1092 /* Initialize ioarcb */
1093 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
1094 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1096 /* initialize the hrrq number where IOA will respond to this command */
1097 ioarcb
->hrrq_id
= index
;
1098 ioarcb
->cdb
[0] = PMCRAID_IDENTIFY_HRRQ
;
1099 ioarcb
->cdb
[1] = index
;
1101 /* IOA expects 64-bit pci address to be written in B.E format
1102 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1104 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1105 hrrq_addr
, ioarcb
->ioarcb_bus_addr
, index
);
1107 memcpy(&(ioarcb
->cdb
[2]), &hrrq_addr
, sizeof(hrrq_addr
));
1108 memcpy(&(ioarcb
->cdb
[10]), &hrrq_size
, sizeof(hrrq_size
));
1110 /* Subsequent commands require HRRQ identification to be successful.
1111 * Note that this gets called even during reset from SCSI mid-layer
1114 pmcraid_send_cmd(cmd
, done_function
,
1115 PMCRAID_INTERNAL_TIMEOUT
,
1116 pmcraid_timeout_handler
);
1119 static void pmcraid_process_ccn(struct pmcraid_cmd
*cmd
);
1120 static void pmcraid_process_ldn(struct pmcraid_cmd
*cmd
);
1123 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1125 * @cmd: initialized command block pointer
1130 static void pmcraid_send_hcam_cmd(struct pmcraid_cmd
*cmd
)
1132 if (cmd
->ioa_cb
->ioarcb
.cdb
[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE
)
1133 atomic_set(&(cmd
->drv_inst
->ccn
.ignore
), 0);
1135 atomic_set(&(cmd
->drv_inst
->ldn
.ignore
), 0);
1137 pmcraid_send_cmd(cmd
, cmd
->cmd_done
, 0, NULL
);
1141 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1143 * @pinstance: pointer to adapter instance structure
1147 * pointer to initialized pmcraid_cmd structure or NULL
1149 static struct pmcraid_cmd
*pmcraid_init_hcam
1151 struct pmcraid_instance
*pinstance
,
1155 struct pmcraid_cmd
*cmd
;
1156 struct pmcraid_ioarcb
*ioarcb
;
1157 struct pmcraid_ioadl_desc
*ioadl
;
1158 struct pmcraid_hostrcb
*hcam
;
1159 void (*cmd_done
) (struct pmcraid_cmd
*);
1163 cmd
= pmcraid_get_free_cmd(pinstance
);
1166 pmcraid_err("no free command blocks for hcam\n");
1170 if (type
== PMCRAID_HCAM_CODE_CONFIG_CHANGE
) {
1171 rcb_size
= sizeof(struct pmcraid_hcam_ccn_ext
);
1172 cmd_done
= pmcraid_process_ccn
;
1173 dma
= pinstance
->ccn
.baddr
+ PMCRAID_AEN_HDR_SIZE
;
1174 hcam
= &pinstance
->ccn
;
1176 rcb_size
= sizeof(struct pmcraid_hcam_ldn
);
1177 cmd_done
= pmcraid_process_ldn
;
1178 dma
= pinstance
->ldn
.baddr
+ PMCRAID_AEN_HDR_SIZE
;
1179 hcam
= &pinstance
->ldn
;
1182 /* initialize command pointer used for HCAM registration */
1185 ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1186 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
1187 offsetof(struct pmcraid_ioarcb
,
1188 add_data
.u
.ioadl
[0]));
1189 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
1190 ioadl
= ioarcb
->add_data
.u
.ioadl
;
1192 /* Initialize ioarcb */
1193 ioarcb
->request_type
= REQ_TYPE_HCAM
;
1194 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1195 ioarcb
->cdb
[0] = PMCRAID_HOST_CONTROLLED_ASYNC
;
1196 ioarcb
->cdb
[1] = type
;
1197 ioarcb
->cdb
[7] = (rcb_size
>> 8) & 0xFF;
1198 ioarcb
->cdb
[8] = (rcb_size
) & 0xFF;
1200 ioarcb
->data_transfer_length
= cpu_to_le32(rcb_size
);
1202 ioadl
[0].flags
|= IOADL_FLAGS_READ_LAST
;
1203 ioadl
[0].data_len
= cpu_to_le32(rcb_size
);
1204 ioadl
[0].address
= cpu_to_le64(dma
);
1206 cmd
->cmd_done
= cmd_done
;
1211 * pmcraid_send_hcam - Send an HCAM to IOA
1212 * @pinstance: ioa config struct
1215 * This function will send a Host Controlled Async command to IOA.
1220 static void pmcraid_send_hcam(struct pmcraid_instance
*pinstance
, u8 type
)
1222 struct pmcraid_cmd
*cmd
= pmcraid_init_hcam(pinstance
, type
);
1223 pmcraid_send_hcam_cmd(cmd
);
1228 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1230 * @cmd: pointer to cmd that is used as cancelling command
1231 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1233 static void pmcraid_prepare_cancel_cmd(
1234 struct pmcraid_cmd
*cmd
,
1235 struct pmcraid_cmd
*cmd_to_cancel
1238 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1241 /* IOARCB address of the command to be cancelled is given in
1242 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1243 * IOARCB address are not masked.
1245 ioarcb_addr
= cpu_to_be64(le64_to_cpu(cmd_to_cancel
->ioa_cb
->ioarcb
.ioarcb_bus_addr
));
1247 /* Get the resource handle to where the command to be aborted has been
1250 ioarcb
->resource_handle
= cmd_to_cancel
->ioa_cb
->ioarcb
.resource_handle
;
1251 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
1252 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
1253 ioarcb
->cdb
[0] = PMCRAID_ABORT_CMD
;
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 le32_to_cpu(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 le32_to_cpu(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 le32_to_cpu(pinstance
->ccn
.hcam
->ilid
),
1560 pinstance
->ccn
.hcam
->op_code
,
1561 (le32_to_cpu(pinstance
->ccn
.hcam
->timestamp1
) |
1562 ((le32_to_cpu(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 le16_to_cpu(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
&= cpu_to_le16(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 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.resource_handle
),
1720 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_le32(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 pmcraid_info("reset_reload: IOA is dead\n");
2380 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
);
2389 if (reset_cmd
== NULL
) {
2390 pmcraid_err("no free cmnd for reset_reload\n");
2394 if (shutdown_type
== SHUTDOWN_NORMAL
)
2395 pinstance
->ioa_bringdown
= 1;
2397 pinstance
->ioa_shutdown_type
= shutdown_type
;
2398 pinstance
->reset_cmd
= reset_cmd
;
2399 pinstance
->force_ioa_reset
= reset
;
2400 pmcraid_info("reset_reload: initiating reset\n");
2401 pmcraid_ioa_reset(reset_cmd
);
2402 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2403 pmcraid_info("reset_reload: waiting for reset to complete\n");
2404 wait_event(pinstance
->reset_wait_q
,
2405 !pinstance
->ioa_reset_in_progress
);
2407 pmcraid_info("reset_reload: reset is complete !!\n");
2408 scsi_unblock_requests(pinstance
->host
);
2409 return pinstance
->ioa_state
!= target_state
;
2412 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2417 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2419 * @pinstance: pointer to adapter instance structure
2422 * whatever is returned from pmcraid_reset_reload
2424 static int pmcraid_reset_bringdown(struct pmcraid_instance
*pinstance
)
2426 return pmcraid_reset_reload(pinstance
,
2432 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2434 * @pinstance: pointer to adapter instance structure
2437 * whatever is returned from pmcraid_reset_reload
2439 static int pmcraid_reset_bringup(struct pmcraid_instance
*pinstance
)
2441 pmcraid_notify_ioastate(pinstance
, PMC_DEVICE_EVENT_RESET_START
);
2443 return pmcraid_reset_reload(pinstance
,
2445 IOA_STATE_OPERATIONAL
);
2449 * pmcraid_request_sense - Send request sense to a device
2450 * @cmd: pmcraid command struct
2452 * This function sends a request sense to a device as a result of a check
2453 * condition. This method re-uses the same command block that failed earlier.
2455 static void pmcraid_request_sense(struct pmcraid_cmd
*cmd
)
2457 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2458 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
2460 /* allocate DMAable memory for sense buffers */
2461 cmd
->sense_buffer
= pci_alloc_consistent(cmd
->drv_inst
->pdev
,
2462 SCSI_SENSE_BUFFERSIZE
,
2463 &cmd
->sense_buffer_dma
);
2465 if (cmd
->sense_buffer
== NULL
) {
2467 ("couldn't allocate sense buffer for request sense\n");
2468 pmcraid_erp_done(cmd
);
2472 /* re-use the command block */
2473 memset(&cmd
->ioa_cb
->ioasa
, 0, sizeof(struct pmcraid_ioasa
));
2474 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
2475 ioarcb
->request_flags0
= (SYNC_COMPLETE
|
2478 ioarcb
->request_type
= REQ_TYPE_SCSI
;
2479 ioarcb
->cdb
[0] = REQUEST_SENSE
;
2480 ioarcb
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2482 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
2483 offsetof(struct pmcraid_ioarcb
,
2484 add_data
.u
.ioadl
[0]));
2485 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
2487 ioarcb
->data_transfer_length
= cpu_to_le32(SCSI_SENSE_BUFFERSIZE
);
2489 ioadl
->address
= cpu_to_le64(cmd
->sense_buffer_dma
);
2490 ioadl
->data_len
= cpu_to_le32(SCSI_SENSE_BUFFERSIZE
);
2491 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
2493 /* request sense might be called as part of error response processing
2494 * which runs in tasklets context. It is possible that mid-layer might
2495 * schedule queuecommand during this time, hence, writting to IOARRIN
2496 * must be protect by host_lock
2498 pmcraid_send_cmd(cmd
, pmcraid_erp_done
,
2499 PMCRAID_REQUEST_SENSE_TIMEOUT
,
2500 pmcraid_timeout_handler
);
2504 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2505 * @cmd: command that failed
2506 * @sense: true if request_sense is required after cancel all
2508 * This function sends a cancel all to a device to clear the queue.
2510 static void pmcraid_cancel_all(struct pmcraid_cmd
*cmd
, u32 sense
)
2512 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2513 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2514 struct pmcraid_resource_entry
*res
= scsi_cmd
->device
->hostdata
;
2515 void (*cmd_done
) (struct pmcraid_cmd
*) = sense
? pmcraid_erp_done
2516 : pmcraid_request_sense
;
2518 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
2519 ioarcb
->request_flags0
= SYNC_OVERRIDE
;
2520 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
2521 ioarcb
->cdb
[0] = PMCRAID_CANCEL_ALL_REQUESTS
;
2523 if (RES_IS_GSCSI(res
->cfg_entry
))
2524 ioarcb
->cdb
[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL
;
2526 ioarcb
->ioadl_bus_addr
= 0;
2527 ioarcb
->ioadl_length
= 0;
2528 ioarcb
->data_transfer_length
= 0;
2529 ioarcb
->ioarcb_bus_addr
&= cpu_to_le64((~0x1FULL
));
2531 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2532 * schedule queuecommand while we are doing this
2534 pmcraid_send_cmd(cmd
, cmd_done
,
2535 PMCRAID_REQUEST_SENSE_TIMEOUT
,
2536 pmcraid_timeout_handler
);
2540 * pmcraid_frame_auto_sense: frame fixed format sense information
2542 * @cmd: pointer to failing command block
2547 static void pmcraid_frame_auto_sense(struct pmcraid_cmd
*cmd
)
2549 u8
*sense_buf
= cmd
->scsi_cmd
->sense_buffer
;
2550 struct pmcraid_resource_entry
*res
= cmd
->scsi_cmd
->device
->hostdata
;
2551 struct pmcraid_ioasa
*ioasa
= &cmd
->ioa_cb
->ioasa
;
2552 u32 ioasc
= le32_to_cpu(ioasa
->ioasc
);
2553 u32 failing_lba
= 0;
2555 memset(sense_buf
, 0, SCSI_SENSE_BUFFERSIZE
);
2556 cmd
->scsi_cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2558 if (RES_IS_VSET(res
->cfg_entry
) &&
2559 ioasc
== PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
&&
2560 ioasa
->u
.vset
.failing_lba_hi
!= 0) {
2562 sense_buf
[0] = 0x72;
2563 sense_buf
[1] = PMCRAID_IOASC_SENSE_KEY(ioasc
);
2564 sense_buf
[2] = PMCRAID_IOASC_SENSE_CODE(ioasc
);
2565 sense_buf
[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc
);
2569 sense_buf
[9] = 0x0A;
2570 sense_buf
[10] = 0x80;
2572 failing_lba
= le32_to_cpu(ioasa
->u
.vset
.failing_lba_hi
);
2574 sense_buf
[12] = (failing_lba
& 0xff000000) >> 24;
2575 sense_buf
[13] = (failing_lba
& 0x00ff0000) >> 16;
2576 sense_buf
[14] = (failing_lba
& 0x0000ff00) >> 8;
2577 sense_buf
[15] = failing_lba
& 0x000000ff;
2579 failing_lba
= le32_to_cpu(ioasa
->u
.vset
.failing_lba_lo
);
2581 sense_buf
[16] = (failing_lba
& 0xff000000) >> 24;
2582 sense_buf
[17] = (failing_lba
& 0x00ff0000) >> 16;
2583 sense_buf
[18] = (failing_lba
& 0x0000ff00) >> 8;
2584 sense_buf
[19] = failing_lba
& 0x000000ff;
2586 sense_buf
[0] = 0x70;
2587 sense_buf
[2] = PMCRAID_IOASC_SENSE_KEY(ioasc
);
2588 sense_buf
[12] = PMCRAID_IOASC_SENSE_CODE(ioasc
);
2589 sense_buf
[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc
);
2591 if (ioasc
== PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
) {
2592 if (RES_IS_VSET(res
->cfg_entry
))
2594 le32_to_cpu(ioasa
->u
.
2595 vset
.failing_lba_lo
);
2596 sense_buf
[0] |= 0x80;
2597 sense_buf
[3] = (failing_lba
>> 24) & 0xff;
2598 sense_buf
[4] = (failing_lba
>> 16) & 0xff;
2599 sense_buf
[5] = (failing_lba
>> 8) & 0xff;
2600 sense_buf
[6] = failing_lba
& 0xff;
2603 sense_buf
[7] = 6; /* additional length */
2608 * pmcraid_error_handler - Error response handlers for a SCSI op
2609 * @cmd: pointer to pmcraid_cmd that has failed
2611 * This function determines whether or not to initiate ERP on the affected
2612 * device. This is called from a tasklet, which doesn't hold any locks.
2615 * 0 it caller can complete the request, otherwise 1 where in error
2616 * handler itself completes the request and returns the command block
2619 static int pmcraid_error_handler(struct pmcraid_cmd
*cmd
)
2621 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2622 struct pmcraid_resource_entry
*res
= scsi_cmd
->device
->hostdata
;
2623 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
2624 struct pmcraid_ioasa
*ioasa
= &cmd
->ioa_cb
->ioasa
;
2625 u32 ioasc
= le32_to_cpu(ioasa
->ioasc
);
2626 u32 masked_ioasc
= ioasc
& PMCRAID_IOASC_SENSE_MASK
;
2627 u32 sense_copied
= 0;
2630 pmcraid_info("resource pointer is NULL\n");
2634 /* If this was a SCSI read/write command keep count of errors */
2635 if (SCSI_CMD_TYPE(scsi_cmd
->cmnd
[0]) == SCSI_READ_CMD
)
2636 atomic_inc(&res
->read_failures
);
2637 else if (SCSI_CMD_TYPE(scsi_cmd
->cmnd
[0]) == SCSI_WRITE_CMD
)
2638 atomic_inc(&res
->write_failures
);
2640 if (!RES_IS_GSCSI(res
->cfg_entry
) &&
2641 masked_ioasc
!= PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR
) {
2642 pmcraid_frame_auto_sense(cmd
);
2645 /* Log IOASC/IOASA information based on user settings */
2646 pmcraid_ioasc_logger(ioasc
, cmd
);
2648 switch (masked_ioasc
) {
2650 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST
:
2651 scsi_cmd
->result
|= (DID_ABORT
<< 16);
2654 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE
:
2655 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE
:
2656 scsi_cmd
->result
|= (DID_NO_CONNECT
<< 16);
2659 case PMCRAID_IOASC_NR_SYNC_REQUIRED
:
2661 scsi_cmd
->result
|= (DID_IMM_RETRY
<< 16);
2664 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
:
2665 scsi_cmd
->result
|= (DID_PASSTHROUGH
<< 16);
2668 case PMCRAID_IOASC_UA_BUS_WAS_RESET
:
2669 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER
:
2670 if (!res
->reset_progress
)
2671 scsi_report_bus_reset(pinstance
->host
,
2672 scsi_cmd
->device
->channel
);
2673 scsi_cmd
->result
|= (DID_ERROR
<< 16);
2676 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR
:
2677 scsi_cmd
->result
|= PMCRAID_IOASC_SENSE_STATUS(ioasc
);
2680 /* if check_condition is not active return with error otherwise
2681 * get/frame the sense buffer
2683 if (PMCRAID_IOASC_SENSE_STATUS(ioasc
) !=
2684 SAM_STAT_CHECK_CONDITION
&&
2685 PMCRAID_IOASC_SENSE_STATUS(ioasc
) != SAM_STAT_ACA_ACTIVE
)
2688 /* If we have auto sense data as part of IOASA pass it to
2691 if (ioasa
->auto_sense_length
!= 0) {
2692 short sense_len
= le16_to_cpu(ioasa
->auto_sense_length
);
2693 int data_size
= min_t(u16
, sense_len
,
2694 SCSI_SENSE_BUFFERSIZE
);
2696 memcpy(scsi_cmd
->sense_buffer
,
2702 if (RES_IS_GSCSI(res
->cfg_entry
))
2703 pmcraid_cancel_all(cmd
, sense_copied
);
2704 else if (sense_copied
)
2705 pmcraid_erp_done(cmd
);
2707 pmcraid_request_sense(cmd
);
2711 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED
:
2715 if (PMCRAID_IOASC_SENSE_KEY(ioasc
) > RECOVERED_ERROR
)
2716 scsi_cmd
->result
|= (DID_ERROR
<< 16);
2723 * pmcraid_reset_device - device reset handler functions
2725 * @scsi_cmd: scsi command struct
2726 * @modifier: reset modifier indicating the reset sequence to be performed
2728 * This function issues a device reset to the affected device.
2729 * A LUN reset will be sent to the device first. If that does
2730 * not work, a target reset will be sent.
2735 static int pmcraid_reset_device(
2736 struct scsi_cmnd
*scsi_cmd
,
2737 unsigned long timeout
,
2741 struct pmcraid_cmd
*cmd
;
2742 struct pmcraid_instance
*pinstance
;
2743 struct pmcraid_resource_entry
*res
;
2744 struct pmcraid_ioarcb
*ioarcb
;
2745 unsigned long lock_flags
;
2749 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
2750 res
= scsi_cmd
->device
->hostdata
;
2753 sdev_printk(KERN_ERR
, scsi_cmd
->device
,
2754 "reset_device: NULL resource pointer\n");
2758 /* If adapter is currently going through reset/reload, return failed.
2759 * This will force the mid-layer to call _eh_bus/host reset, which
2760 * will then go to sleep and wait for the reset to complete
2762 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
2763 if (pinstance
->ioa_reset_in_progress
||
2764 pinstance
->ioa_state
== IOA_STATE_DEAD
) {
2765 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2769 res
->reset_progress
= 1;
2770 pmcraid_info("Resetting %s resource with addr %x\n",
2771 ((modifier
& RESET_DEVICE_LUN
) ? "LUN" :
2772 ((modifier
& RESET_DEVICE_TARGET
) ? "TARGET" : "BUS")),
2773 le32_to_cpu(res
->cfg_entry
.resource_address
));
2775 /* get a free cmd block */
2776 cmd
= pmcraid_get_free_cmd(pinstance
);
2779 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2780 pmcraid_err("%s: no cmd blocks are available\n", __func__
);
2784 ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2785 ioarcb
->resource_handle
= res
->cfg_entry
.resource_handle
;
2786 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
2787 ioarcb
->cdb
[0] = PMCRAID_RESET_DEVICE
;
2789 /* Initialize reset modifier bits */
2791 modifier
= ENABLE_RESET_MODIFIER
| modifier
;
2793 ioarcb
->cdb
[1] = modifier
;
2795 init_completion(&cmd
->wait_for_completion
);
2796 cmd
->completion_req
= 1;
2798 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2799 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2800 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.resource_handle
),
2801 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2);
2803 pmcraid_send_cmd(cmd
,
2804 pmcraid_internal_done
,
2806 pmcraid_timeout_handler
);
2808 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2810 /* RESET_DEVICE command completes after all pending IOARCBs are
2811 * completed. Once this command is completed, pmcraind_internal_done
2812 * will wake up the 'completion' queue.
2814 wait_for_completion(&cmd
->wait_for_completion
);
2816 /* complete the command here itself and return the command block
2819 pmcraid_return_cmd(cmd
);
2820 res
->reset_progress
= 0;
2821 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
2823 /* set the return value based on the returned ioasc */
2824 return PMCRAID_IOASC_SENSE_KEY(ioasc
) ? FAILED
: SUCCESS
;
2828 * _pmcraid_io_done - helper for pmcraid_io_done function
2830 * @cmd: pointer to pmcraid command struct
2831 * @reslen: residual data length to be set in the ioasa
2832 * @ioasc: ioasc either returned by IOA or set by driver itself.
2834 * This function is invoked by pmcraid_io_done to complete mid-layer
2838 * 0 if caller is required to return it to free_pool. Returns 1 if
2839 * caller need not worry about freeing command block as error handler
2840 * will take care of that.
2843 static int _pmcraid_io_done(struct pmcraid_cmd
*cmd
, int reslen
, int ioasc
)
2845 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2848 scsi_set_resid(scsi_cmd
, reslen
);
2850 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2851 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
2852 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2853 ioasc
, scsi_cmd
->result
);
2855 if (PMCRAID_IOASC_SENSE_KEY(ioasc
) != 0)
2856 rc
= pmcraid_error_handler(cmd
);
2859 scsi_dma_unmap(scsi_cmd
);
2860 scsi_cmd
->scsi_done(scsi_cmd
);
2867 * pmcraid_io_done - SCSI completion function
2869 * @cmd: pointer to pmcraid command struct
2871 * This function is invoked by tasklet/mid-layer error handler to completing
2872 * the SCSI ops sent from mid-layer.
2878 static void pmcraid_io_done(struct pmcraid_cmd
*cmd
)
2880 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
2881 u32 reslen
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.residual_data_length
);
2883 if (_pmcraid_io_done(cmd
, reslen
, ioasc
) == 0)
2884 pmcraid_return_cmd(cmd
);
2888 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2890 * @cmd: command block of the command to be aborted
2893 * returns pointer to command structure used as cancelling cmd
2895 static struct pmcraid_cmd
*pmcraid_abort_cmd(struct pmcraid_cmd
*cmd
)
2897 struct pmcraid_cmd
*cancel_cmd
;
2898 struct pmcraid_instance
*pinstance
;
2899 struct pmcraid_resource_entry
*res
;
2901 pinstance
= (struct pmcraid_instance
*)cmd
->drv_inst
;
2902 res
= cmd
->scsi_cmd
->device
->hostdata
;
2904 cancel_cmd
= pmcraid_get_free_cmd(pinstance
);
2906 if (cancel_cmd
== NULL
) {
2907 pmcraid_err("%s: no cmd blocks are available\n", __func__
);
2911 pmcraid_prepare_cancel_cmd(cancel_cmd
, cmd
);
2913 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2914 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2915 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2);
2917 init_completion(&cancel_cmd
->wait_for_completion
);
2918 cancel_cmd
->completion_req
= 1;
2920 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2921 le32_to_cpu(cancel_cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
2922 cancel_cmd
->ioa_cb
->ioarcb
.cdb
[0],
2923 le32_to_cpu(cancel_cmd
->ioa_cb
->ioarcb
.resource_handle
));
2925 pmcraid_send_cmd(cancel_cmd
,
2926 pmcraid_internal_done
,
2927 PMCRAID_INTERNAL_TIMEOUT
,
2928 pmcraid_timeout_handler
);
2933 * pmcraid_abort_complete - Waits for ABORT TASK completion
2935 * @cancel_cmd: command block use as cancelling command
2938 * returns SUCCESS if ABORT TASK has good completion
2941 static int pmcraid_abort_complete(struct pmcraid_cmd
*cancel_cmd
)
2943 struct pmcraid_resource_entry
*res
;
2946 wait_for_completion(&cancel_cmd
->wait_for_completion
);
2947 res
= cancel_cmd
->res
;
2948 cancel_cmd
->res
= NULL
;
2949 ioasc
= le32_to_cpu(cancel_cmd
->ioa_cb
->ioasa
.ioasc
);
2951 /* If the abort task is not timed out we will get a Good completion
2952 * as sense_key, otherwise we may get one the following responses
2953 * due to subsequent bus reset or device reset. In case IOASC is
2954 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2956 if (ioasc
== PMCRAID_IOASC_UA_BUS_WAS_RESET
||
2957 ioasc
== PMCRAID_IOASC_NR_SYNC_REQUIRED
) {
2958 if (ioasc
== PMCRAID_IOASC_NR_SYNC_REQUIRED
)
2963 /* complete the command here itself */
2964 pmcraid_return_cmd(cancel_cmd
);
2965 return PMCRAID_IOASC_SENSE_KEY(ioasc
) ? FAILED
: SUCCESS
;
2969 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
2971 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
2972 * mid-layer ensures that no other commands are queued. This
2973 * never gets called under interrupt, but a separate eh thread.
2978 static int pmcraid_eh_abort_handler(struct scsi_cmnd
*scsi_cmd
)
2980 struct pmcraid_instance
*pinstance
;
2981 struct pmcraid_cmd
*cmd
;
2982 struct pmcraid_resource_entry
*res
;
2983 unsigned long host_lock_flags
;
2984 unsigned long pending_lock_flags
;
2985 struct pmcraid_cmd
*cancel_cmd
= NULL
;
2990 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
2992 scmd_printk(KERN_INFO
, scsi_cmd
,
2993 "I/O command timed out, aborting it.\n");
2995 res
= scsi_cmd
->device
->hostdata
;
3000 /* If we are currently going through reset/reload, return failed.
3001 * This will force the mid-layer to eventually call
3002 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3005 spin_lock_irqsave(pinstance
->host
->host_lock
, host_lock_flags
);
3007 if (pinstance
->ioa_reset_in_progress
||
3008 pinstance
->ioa_state
== IOA_STATE_DEAD
) {
3009 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
3014 /* loop over pending cmd list to find cmd corresponding to this
3015 * scsi_cmd. Note that this command might not have been completed
3016 * already. locking: all pending commands are protected with
3017 * pending_pool_lock.
3019 spin_lock_irqsave(&pinstance
->pending_pool_lock
, pending_lock_flags
);
3020 list_for_each_entry(cmd
, &pinstance
->pending_cmd_pool
, free_list
) {
3022 if (cmd
->scsi_cmd
== scsi_cmd
) {
3028 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
,
3029 pending_lock_flags
);
3031 /* If the command to be aborted was given to IOA and still pending with
3032 * it, send ABORT_TASK to abort this and wait for its completion
3035 cancel_cmd
= pmcraid_abort_cmd(cmd
);
3037 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
3041 cancel_cmd
->res
= cmd
->scsi_cmd
->device
->hostdata
;
3042 rc
= pmcraid_abort_complete(cancel_cmd
);
3045 return cmd_found
? rc
: SUCCESS
;
3049 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3051 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3053 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3054 * Since these are called from mid-layer EH thread, no other IO will be queued
3055 * to the resource being reset. However, control path (IOCTL) may be active so
3056 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3057 * takes care by locking/unlocking host_lock.
3062 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd
*scmd
)
3064 scmd_printk(KERN_INFO
, scmd
,
3065 "resetting device due to an I/O command timeout.\n");
3066 return pmcraid_reset_device(scmd
,
3067 PMCRAID_INTERNAL_TIMEOUT
,
3071 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd
*scmd
)
3073 scmd_printk(KERN_INFO
, scmd
,
3074 "Doing bus reset due to an I/O command timeout.\n");
3075 return pmcraid_reset_device(scmd
,
3076 PMCRAID_RESET_BUS_TIMEOUT
,
3080 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd
*scmd
)
3082 scmd_printk(KERN_INFO
, scmd
,
3083 "Doing target reset due to an I/O command timeout.\n");
3084 return pmcraid_reset_device(scmd
,
3085 PMCRAID_INTERNAL_TIMEOUT
,
3086 RESET_DEVICE_TARGET
);
3090 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3092 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3094 * Initiates adapter reset to bring it up to operational state
3099 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd
*scmd
)
3101 unsigned long interval
= 10000; /* 10 seconds interval */
3102 int waits
= jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT
) / interval
;
3103 struct pmcraid_instance
*pinstance
=
3104 (struct pmcraid_instance
*)(scmd
->device
->host
->hostdata
);
3107 /* wait for an additional 150 seconds just in case firmware could come
3108 * up and if it could complete all the pending commands excluding the
3109 * two HCAM (CCN and LDN).
3112 if (atomic_read(&pinstance
->outstanding_cmds
) <=
3113 PMCRAID_MAX_HCAM_CMD
)
3118 dev_err(&pinstance
->pdev
->dev
,
3119 "Adapter being reset due to an I/O command timeout.\n");
3120 return pmcraid_reset_bringup(pinstance
) == 0 ? SUCCESS
: FAILED
;
3124 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3125 * @cmd: pmcraid command struct
3126 * @sgcount: count of scatter-gather elements
3129 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3130 * or external IOADLs
3132 static struct pmcraid_ioadl_desc
*
3133 pmcraid_init_ioadls(struct pmcraid_cmd
*cmd
, int sgcount
)
3135 struct pmcraid_ioadl_desc
*ioadl
;
3136 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
3137 int ioadl_count
= 0;
3139 if (ioarcb
->add_cmd_param_length
)
3140 ioadl_count
= DIV_ROUND_UP(le16_to_cpu(ioarcb
->add_cmd_param_length
), 16);
3141 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
) * sgcount
);
3143 if ((sgcount
+ ioadl_count
) > (ARRAY_SIZE(ioarcb
->add_data
.u
.ioadl
))) {
3144 /* external ioadls start at offset 0x80 from control_block
3145 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3146 * It is necessary to indicate to firmware that driver is
3147 * using ioadls to be treated as external to IOARCB.
3149 ioarcb
->ioarcb_bus_addr
&= cpu_to_le64(~(0x1FULL
));
3150 ioarcb
->ioadl_bus_addr
=
3151 cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
3152 offsetof(struct pmcraid_ioarcb
,
3153 add_data
.u
.ioadl
[3]));
3154 ioadl
= &ioarcb
->add_data
.u
.ioadl
[3];
3156 ioarcb
->ioadl_bus_addr
=
3157 cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
3158 offsetof(struct pmcraid_ioarcb
,
3159 add_data
.u
.ioadl
[ioadl_count
]));
3161 ioadl
= &ioarcb
->add_data
.u
.ioadl
[ioadl_count
];
3162 ioarcb
->ioarcb_bus_addr
|=
3163 cpu_to_le64(DIV_ROUND_CLOSEST(sgcount
+ ioadl_count
, 8));
3170 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3171 * @pinstance: pointer to adapter instance structure
3172 * @cmd: pmcraid command struct
3174 * This function is invoked by queuecommand entry point while sending a command
3175 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3178 * 0 on success or -1 on failure
3180 static int pmcraid_build_ioadl(
3181 struct pmcraid_instance
*pinstance
,
3182 struct pmcraid_cmd
*cmd
3186 struct scatterlist
*sglist
;
3188 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
3189 struct pmcraid_ioarcb
*ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3190 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
3192 u32 length
= scsi_bufflen(scsi_cmd
);
3197 nseg
= scsi_dma_map(scsi_cmd
);
3200 scmd_printk(KERN_ERR
, scsi_cmd
, "scsi_map_dma failed!\n");
3202 } else if (nseg
> PMCRAID_MAX_IOADLS
) {
3203 scsi_dma_unmap(scsi_cmd
);
3204 scmd_printk(KERN_ERR
, scsi_cmd
,
3205 "sg count is (%d) more than allowed!\n", nseg
);
3209 /* Initialize IOARCB data transfer length fields */
3210 if (scsi_cmd
->sc_data_direction
== DMA_TO_DEVICE
)
3211 ioarcb
->request_flags0
|= TRANSFER_DIR_WRITE
;
3213 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3214 ioarcb
->data_transfer_length
= cpu_to_le32(length
);
3215 ioadl
= pmcraid_init_ioadls(cmd
, nseg
);
3217 /* Initialize IOADL descriptor addresses */
3218 scsi_for_each_sg(scsi_cmd
, sglist
, nseg
, i
) {
3219 ioadl
[i
].data_len
= cpu_to_le32(sg_dma_len(sglist
));
3220 ioadl
[i
].address
= cpu_to_le64(sg_dma_address(sglist
));
3223 /* setup last descriptor */
3224 ioadl
[i
- 1].flags
= IOADL_FLAGS_LAST_DESC
;
3230 * pmcraid_free_sglist - Frees an allocated SG buffer list
3231 * @sglist: scatter/gather list pointer
3233 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3238 static void pmcraid_free_sglist(struct pmcraid_sglist
*sglist
)
3242 for (i
= 0; i
< sglist
->num_sg
; i
++)
3243 __free_pages(sg_page(&(sglist
->scatterlist
[i
])),
3250 * pmcraid_alloc_sglist - Allocates memory for a SG list
3251 * @buflen: buffer length
3253 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3257 * pointer to sglist / NULL on failure
3259 static struct pmcraid_sglist
*pmcraid_alloc_sglist(int buflen
)
3261 struct pmcraid_sglist
*sglist
;
3262 struct scatterlist
*scatterlist
;
3269 sg_size
= buflen
/ (PMCRAID_MAX_IOADLS
- 1);
3270 order
= (sg_size
> 0) ? get_order(sg_size
) : 0;
3271 bsize_elem
= PAGE_SIZE
* (1 << order
);
3273 /* Determine the actual number of sg entries needed */
3274 if (buflen
% bsize_elem
)
3275 num_elem
= (buflen
/ bsize_elem
) + 1;
3277 num_elem
= buflen
/ bsize_elem
;
3279 /* Allocate a scatter/gather list for the DMA */
3280 sglist
= kzalloc(sizeof(struct pmcraid_sglist
) +
3281 (sizeof(struct scatterlist
) * (num_elem
- 1)),
3287 scatterlist
= sglist
->scatterlist
;
3288 sg_init_table(scatterlist
, num_elem
);
3289 sglist
->order
= order
;
3290 sglist
->num_sg
= num_elem
;
3293 for (i
= 0; i
< num_elem
; i
++) {
3294 page
= alloc_pages(GFP_KERNEL
|GFP_DMA
|__GFP_ZERO
, order
);
3296 for (j
= i
- 1; j
>= 0; j
--)
3297 __free_pages(sg_page(&scatterlist
[j
]), order
);
3302 sg_set_page(&scatterlist
[i
], page
,
3303 sg_size
< bsize_elem
? sg_size
: bsize_elem
, 0);
3304 sg_size
-= bsize_elem
;
3311 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3312 * @sglist: scatter/gather list pointer
3313 * @buffer: buffer pointer
3314 * @len: buffer length
3315 * @direction: data transfer direction
3317 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3320 * 0 on success / other on failure
3322 static int pmcraid_copy_sglist(
3323 struct pmcraid_sglist
*sglist
,
3324 void __user
*buffer
,
3329 struct scatterlist
*scatterlist
;
3335 /* Determine the actual number of bytes per element */
3336 bsize_elem
= PAGE_SIZE
* (1 << sglist
->order
);
3338 scatterlist
= sglist
->scatterlist
;
3340 for (i
= 0; i
< (len
/ bsize_elem
); i
++, buffer
+= bsize_elem
) {
3341 struct page
*page
= sg_page(&scatterlist
[i
]);
3344 if (direction
== DMA_TO_DEVICE
)
3345 rc
= copy_from_user(kaddr
, buffer
, bsize_elem
);
3347 rc
= copy_to_user(buffer
, kaddr
, bsize_elem
);
3352 pmcraid_err("failed to copy user data into sg list\n");
3356 scatterlist
[i
].length
= bsize_elem
;
3359 if (len
% bsize_elem
) {
3360 struct page
*page
= sg_page(&scatterlist
[i
]);
3364 if (direction
== DMA_TO_DEVICE
)
3365 rc
= copy_from_user(kaddr
, buffer
, len
% bsize_elem
);
3367 rc
= copy_to_user(buffer
, kaddr
, len
% bsize_elem
);
3371 scatterlist
[i
].length
= len
% bsize_elem
;
3375 pmcraid_err("failed to copy user data into sg list\n");
3383 * pmcraid_queuecommand - Queue a mid-layer request
3384 * @scsi_cmd: scsi command struct
3385 * @done: done function
3387 * This function queues a request generated by the mid-layer. Midlayer calls
3388 * this routine within host->lock. Some of the functions called by queuecommand
3389 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3393 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3394 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3396 static int pmcraid_queuecommand_lck(
3397 struct scsi_cmnd
*scsi_cmd
,
3398 void (*done
) (struct scsi_cmnd
*)
3401 struct pmcraid_instance
*pinstance
;
3402 struct pmcraid_resource_entry
*res
;
3403 struct pmcraid_ioarcb
*ioarcb
;
3404 struct pmcraid_cmd
*cmd
;
3409 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
3410 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
3411 scsi_cmd
->scsi_done
= done
;
3412 res
= scsi_cmd
->device
->hostdata
;
3413 scsi_cmd
->result
= (DID_OK
<< 16);
3415 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3418 if (pinstance
->ioa_state
== IOA_STATE_DEAD
) {
3419 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3420 scsi_cmd
->result
= (DID_NO_CONNECT
<< 16);
3421 scsi_cmd
->scsi_done(scsi_cmd
);
3425 /* If IOA reset is in progress, can't queue the commands */
3426 if (pinstance
->ioa_reset_in_progress
)
3427 return SCSI_MLQUEUE_HOST_BUSY
;
3429 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3430 * the command here itself with success return
3432 if (scsi_cmd
->cmnd
[0] == SYNCHRONIZE_CACHE
) {
3433 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3434 scsi_cmd
->scsi_done(scsi_cmd
);
3438 /* initialize the command and IOARCB to be sent to IOA */
3439 cmd
= pmcraid_get_free_cmd(pinstance
);
3442 pmcraid_err("free command block is not available\n");
3443 return SCSI_MLQUEUE_HOST_BUSY
;
3446 cmd
->scsi_cmd
= scsi_cmd
;
3447 ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3448 memcpy(ioarcb
->cdb
, scsi_cmd
->cmnd
, scsi_cmd
->cmd_len
);
3449 ioarcb
->resource_handle
= res
->cfg_entry
.resource_handle
;
3450 ioarcb
->request_type
= REQ_TYPE_SCSI
;
3452 /* set hrrq number where the IOA should respond to. Note that all cmds
3453 * generated internally uses hrrq_id 0, exception to this is the cmd
3454 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3455 * hrrq_id assigned here in queuecommand
3457 ioarcb
->hrrq_id
= atomic_add_return(1, &(pinstance
->last_message_id
)) %
3458 pinstance
->num_hrrq
;
3459 cmd
->cmd_done
= pmcraid_io_done
;
3461 if (RES_IS_GSCSI(res
->cfg_entry
) || RES_IS_VSET(res
->cfg_entry
)) {
3462 if (scsi_cmd
->underflow
== 0)
3463 ioarcb
->request_flags0
|= INHIBIT_UL_CHECK
;
3465 if (res
->sync_reqd
) {
3466 ioarcb
->request_flags0
|= SYNC_COMPLETE
;
3470 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3472 if (scsi_cmd
->flags
& SCMD_TAGGED
)
3473 ioarcb
->request_flags1
|= TASK_TAG_SIMPLE
;
3475 if (RES_IS_GSCSI(res
->cfg_entry
))
3476 ioarcb
->request_flags1
|= DELAY_AFTER_RESET
;
3479 rc
= pmcraid_build_ioadl(pinstance
, cmd
);
3481 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3482 le32_to_cpu(ioarcb
->response_handle
) >> 2,
3483 scsi_cmd
->cmnd
[0], pinstance
->host
->unique_id
,
3484 RES_IS_VSET(res
->cfg_entry
) ? PMCRAID_VSET_BUS_ID
:
3485 PMCRAID_PHYS_BUS_ID
,
3486 RES_IS_VSET(res
->cfg_entry
) ?
3487 (fw_version
<= PMCRAID_FW_VERSION_1
?
3488 res
->cfg_entry
.unique_flags1
:
3489 le16_to_cpu(res
->cfg_entry
.array_id
) & 0xFF) :
3490 RES_TARGET(res
->cfg_entry
.resource_address
),
3491 RES_LUN(res
->cfg_entry
.resource_address
));
3493 if (likely(rc
== 0)) {
3494 _pmcraid_fire_command(cmd
);
3496 pmcraid_err("queuecommand could not build ioadl\n");
3497 pmcraid_return_cmd(cmd
);
3498 rc
= SCSI_MLQUEUE_HOST_BUSY
;
3504 static DEF_SCSI_QCMD(pmcraid_queuecommand
)
3507 * pmcraid_open -char node "open" entry, allowed only users with admin access
3509 static int pmcraid_chr_open(struct inode
*inode
, struct file
*filep
)
3511 struct pmcraid_instance
*pinstance
;
3513 if (!capable(CAP_SYS_ADMIN
))
3516 /* Populate adapter instance * pointer for use by ioctl */
3517 pinstance
= container_of(inode
->i_cdev
, struct pmcraid_instance
, cdev
);
3518 filep
->private_data
= pinstance
;
3524 * pmcraid_fasync - Async notifier registration from applications
3526 * This function adds the calling process to a driver global queue. When an
3527 * event occurs, SIGIO will be sent to all processes in this queue.
3529 static int pmcraid_chr_fasync(int fd
, struct file
*filep
, int mode
)
3531 struct pmcraid_instance
*pinstance
;
3534 pinstance
= filep
->private_data
;
3535 mutex_lock(&pinstance
->aen_queue_lock
);
3536 rc
= fasync_helper(fd
, filep
, mode
, &pinstance
->aen_queue
);
3537 mutex_unlock(&pinstance
->aen_queue_lock
);
3544 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3545 * commands sent over IOCTL interface
3547 * @cmd : pointer to struct pmcraid_cmd
3548 * @buflen : length of the request buffer
3549 * @direction : data transfer direction
3552 * 0 on success, non-zero error code on failure
3554 static int pmcraid_build_passthrough_ioadls(
3555 struct pmcraid_cmd
*cmd
,
3560 struct pmcraid_sglist
*sglist
= NULL
;
3561 struct scatterlist
*sg
= NULL
;
3562 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
3563 struct pmcraid_ioadl_desc
*ioadl
;
3566 sglist
= pmcraid_alloc_sglist(buflen
);
3569 pmcraid_err("can't allocate memory for passthrough SGls\n");
3573 sglist
->num_dma_sg
= pci_map_sg(cmd
->drv_inst
->pdev
,
3574 sglist
->scatterlist
,
3575 sglist
->num_sg
, direction
);
3577 if (!sglist
->num_dma_sg
|| sglist
->num_dma_sg
> PMCRAID_MAX_IOADLS
) {
3578 dev_err(&cmd
->drv_inst
->pdev
->dev
,
3579 "Failed to map passthrough buffer!\n");
3580 pmcraid_free_sglist(sglist
);
3584 cmd
->sglist
= sglist
;
3585 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3587 ioadl
= pmcraid_init_ioadls(cmd
, sglist
->num_dma_sg
);
3589 /* Initialize IOADL descriptor addresses */
3590 for_each_sg(sglist
->scatterlist
, sg
, sglist
->num_dma_sg
, i
) {
3591 ioadl
[i
].data_len
= cpu_to_le32(sg_dma_len(sg
));
3592 ioadl
[i
].address
= cpu_to_le64(sg_dma_address(sg
));
3596 /* setup the last descriptor */
3597 ioadl
[i
- 1].flags
= IOADL_FLAGS_LAST_DESC
;
3604 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3606 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3607 * @buflen: size of the request buffer
3608 * @direction: data transfer direction
3611 * 0 on success, non-zero error code on failure
3613 static void pmcraid_release_passthrough_ioadls(
3614 struct pmcraid_cmd
*cmd
,
3619 struct pmcraid_sglist
*sglist
= cmd
->sglist
;
3622 pci_unmap_sg(cmd
->drv_inst
->pdev
,
3623 sglist
->scatterlist
,
3626 pmcraid_free_sglist(sglist
);
3632 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3634 * @pinstance: pointer to adapter instance structure
3636 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3639 * 0 on success, non-zero error code on failure
3641 static long pmcraid_ioctl_passthrough(
3642 struct pmcraid_instance
*pinstance
,
3643 unsigned int ioctl_cmd
,
3644 unsigned int buflen
,
3648 struct pmcraid_passthrough_ioctl_buffer
*buffer
;
3649 struct pmcraid_ioarcb
*ioarcb
;
3650 struct pmcraid_cmd
*cmd
;
3651 struct pmcraid_cmd
*cancel_cmd
;
3652 void __user
*request_buffer
;
3653 unsigned long request_offset
;
3654 unsigned long lock_flags
;
3659 u8 access
, direction
;
3662 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3663 if (pinstance
->ioa_reset_in_progress
) {
3664 rc
= wait_event_interruptible_timeout(
3665 pinstance
->reset_wait_q
,
3666 !pinstance
->ioa_reset_in_progress
,
3667 msecs_to_jiffies(10000));
3672 return -ERESTARTSYS
;
3675 /* If adapter is not in operational state, return error */
3676 if (pinstance
->ioa_state
!= IOA_STATE_OPERATIONAL
) {
3677 pmcraid_err("IOA is not operational\n");
3681 buffer_size
= sizeof(struct pmcraid_passthrough_ioctl_buffer
);
3682 buffer
= kmalloc(buffer_size
, GFP_KERNEL
);
3685 pmcraid_err("no memory for passthrough buffer\n");
3690 offsetof(struct pmcraid_passthrough_ioctl_buffer
, request_buffer
);
3692 request_buffer
= arg
+ request_offset
;
3694 rc
= copy_from_user(buffer
, arg
,
3695 sizeof(struct pmcraid_passthrough_ioctl_buffer
));
3697 ioasa
= arg
+ offsetof(struct pmcraid_passthrough_ioctl_buffer
, ioasa
);
3700 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3702 goto out_free_buffer
;
3705 request_size
= le32_to_cpu(buffer
->ioarcb
.data_transfer_length
);
3707 if (buffer
->ioarcb
.request_flags0
& TRANSFER_DIR_WRITE
) {
3708 access
= VERIFY_READ
;
3709 direction
= DMA_TO_DEVICE
;
3711 access
= VERIFY_WRITE
;
3712 direction
= DMA_FROM_DEVICE
;
3715 if (request_size
< 0) {
3717 goto out_free_buffer
;
3720 /* check if we have any additional command parameters */
3721 if (le16_to_cpu(buffer
->ioarcb
.add_cmd_param_length
)
3722 > PMCRAID_ADD_CMD_PARAM_LEN
) {
3724 goto out_free_buffer
;
3727 cmd
= pmcraid_get_free_cmd(pinstance
);
3730 pmcraid_err("free command block is not available\n");
3732 goto out_free_buffer
;
3735 cmd
->scsi_cmd
= NULL
;
3736 ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3738 /* Copy the user-provided IOARCB stuff field by field */
3739 ioarcb
->resource_handle
= buffer
->ioarcb
.resource_handle
;
3740 ioarcb
->data_transfer_length
= buffer
->ioarcb
.data_transfer_length
;
3741 ioarcb
->cmd_timeout
= buffer
->ioarcb
.cmd_timeout
;
3742 ioarcb
->request_type
= buffer
->ioarcb
.request_type
;
3743 ioarcb
->request_flags0
= buffer
->ioarcb
.request_flags0
;
3744 ioarcb
->request_flags1
= buffer
->ioarcb
.request_flags1
;
3745 memcpy(ioarcb
->cdb
, buffer
->ioarcb
.cdb
, PMCRAID_MAX_CDB_LEN
);
3747 if (buffer
->ioarcb
.add_cmd_param_length
) {
3748 ioarcb
->add_cmd_param_length
=
3749 buffer
->ioarcb
.add_cmd_param_length
;
3750 ioarcb
->add_cmd_param_offset
=
3751 buffer
->ioarcb
.add_cmd_param_offset
;
3752 memcpy(ioarcb
->add_data
.u
.add_cmd_params
,
3753 buffer
->ioarcb
.add_data
.u
.add_cmd_params
,
3754 le16_to_cpu(buffer
->ioarcb
.add_cmd_param_length
));
3757 /* set hrrq number where the IOA should respond to. Note that all cmds
3758 * generated internally uses hrrq_id 0, exception to this is the cmd
3759 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3760 * hrrq_id assigned here in queuecommand
3762 ioarcb
->hrrq_id
= atomic_add_return(1, &(pinstance
->last_message_id
)) %
3763 pinstance
->num_hrrq
;
3766 rc
= pmcraid_build_passthrough_ioadls(cmd
,
3770 pmcraid_err("couldn't build passthrough ioadls\n");
3773 } else if (request_size
< 0) {
3778 /* If data is being written into the device, copy the data from user
3781 if (direction
== DMA_TO_DEVICE
&& request_size
> 0) {
3782 rc
= pmcraid_copy_sglist(cmd
->sglist
,
3787 pmcraid_err("failed to copy user buffer\n");
3788 goto out_free_sglist
;
3792 /* passthrough ioctl is a blocking command so, put the user to sleep
3793 * until timeout. Note that a timeout value of 0 means, do timeout.
3795 cmd
->cmd_done
= pmcraid_internal_done
;
3796 init_completion(&cmd
->wait_for_completion
);
3797 cmd
->completion_req
= 1;
3799 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3800 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
3801 cmd
->ioa_cb
->ioarcb
.cdb
[0],
3802 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.resource_handle
));
3804 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
3805 _pmcraid_fire_command(cmd
);
3806 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
3808 /* NOTE ! Remove the below line once abort_task is implemented
3809 * in firmware. This line disables ioctl command timeout handling logic
3810 * similar to IO command timeout handling, making ioctl commands to wait
3811 * until the command completion regardless of timeout value specified in
3814 buffer
->ioarcb
.cmd_timeout
= 0;
3816 /* If command timeout is specified put caller to wait till that time,
3817 * otherwise it would be blocking wait. If command gets timed out, it
3820 if (buffer
->ioarcb
.cmd_timeout
== 0) {
3821 wait_for_completion(&cmd
->wait_for_completion
);
3822 } else if (!wait_for_completion_timeout(
3823 &cmd
->wait_for_completion
,
3824 msecs_to_jiffies(le16_to_cpu(buffer
->ioarcb
.cmd_timeout
) * 1000))) {
3826 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3827 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
3828 cmd
->ioa_cb
->ioarcb
.cdb
[0]);
3830 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
3831 cancel_cmd
= pmcraid_abort_cmd(cmd
);
3832 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
3835 wait_for_completion(&cancel_cmd
->wait_for_completion
);
3836 ioasc
= le32_to_cpu(cancel_cmd
->ioa_cb
->ioasa
.ioasc
);
3837 pmcraid_return_cmd(cancel_cmd
);
3839 /* if abort task couldn't find the command i.e it got
3840 * completed prior to aborting, return good completion.
3841 * if command got aborted successfully or there was IOA
3842 * reset due to abort task itself getting timedout then
3845 if (ioasc
== PMCRAID_IOASC_IOA_WAS_RESET
||
3846 PMCRAID_IOASC_SENSE_KEY(ioasc
) == 0x00) {
3847 if (ioasc
!= PMCRAID_IOASC_GC_IOARCB_NOTFOUND
)
3849 goto out_handle_response
;
3853 /* no command block for abort task or abort task failed to abort
3854 * the IOARCB, then wait for 150 more seconds and initiate reset
3855 * sequence after timeout
3857 if (!wait_for_completion_timeout(
3858 &cmd
->wait_for_completion
,
3859 msecs_to_jiffies(150 * 1000))) {
3860 pmcraid_reset_bringup(cmd
->drv_inst
);
3865 out_handle_response
:
3866 /* copy entire IOASA buffer and return IOCTL success.
3867 * If copying IOASA to user-buffer fails, return
3870 if (copy_to_user(ioasa
, &cmd
->ioa_cb
->ioasa
,
3871 sizeof(struct pmcraid_ioasa
))) {
3872 pmcraid_err("failed to copy ioasa buffer to user\n");
3876 /* If the data transfer was from device, copy the data onto user
3879 else if (direction
== DMA_FROM_DEVICE
&& request_size
> 0) {
3880 rc
= pmcraid_copy_sglist(cmd
->sglist
,
3885 pmcraid_err("failed to copy user buffer\n");
3891 pmcraid_release_passthrough_ioadls(cmd
, request_size
, direction
);
3894 pmcraid_return_cmd(cmd
);
3906 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3908 * @pinstance: pointer to adapter instance structure
3909 * @cmd: ioctl command passed in
3910 * @buflen: length of user_buffer
3911 * @user_buffer: user buffer pointer
3914 * 0 in case of success, otherwise appropriate error code
3916 static long pmcraid_ioctl_driver(
3917 struct pmcraid_instance
*pinstance
,
3919 unsigned int buflen
,
3920 void __user
*user_buffer
3926 case PMCRAID_IOCTL_RESET_ADAPTER
:
3927 pmcraid_reset_bringup(pinstance
);
3939 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
3941 * @cmd: ioctl command
3943 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
3946 * negetive error code if there are access issues, otherwise zero.
3947 * Upon success, returns ioctl header copied out of user buffer.
3950 static int pmcraid_check_ioctl_buffer(
3953 struct pmcraid_ioctl_header
*hdr
3958 if (copy_from_user(hdr
, arg
, sizeof(struct pmcraid_ioctl_header
))) {
3959 pmcraid_err("couldn't copy ioctl header from user buffer\n");
3963 /* check for valid driver signature */
3964 rc
= memcmp(hdr
->signature
,
3965 PMCRAID_IOCTL_SIGNATURE
,
3966 sizeof(hdr
->signature
));
3968 pmcraid_err("signature verification failed\n");
3976 * pmcraid_ioctl - char node ioctl entry point
3978 static long pmcraid_chr_ioctl(
3984 struct pmcraid_instance
*pinstance
= NULL
;
3985 struct pmcraid_ioctl_header
*hdr
= NULL
;
3986 void __user
*argp
= (void __user
*)arg
;
3987 int retval
= -ENOTTY
;
3989 hdr
= kmalloc(sizeof(struct pmcraid_ioctl_header
), GFP_KERNEL
);
3992 pmcraid_err("failed to allocate memory for ioctl header\n");
3996 retval
= pmcraid_check_ioctl_buffer(cmd
, argp
, hdr
);
3999 pmcraid_info("chr_ioctl: header check failed\n");
4004 pinstance
= filep
->private_data
;
4007 pmcraid_info("adapter instance is not found\n");
4012 switch (_IOC_TYPE(cmd
)) {
4014 case PMCRAID_PASSTHROUGH_IOCTL
:
4015 /* If ioctl code is to download microcode, we need to block
4016 * mid-layer requests.
4018 if (cmd
== PMCRAID_IOCTL_DOWNLOAD_MICROCODE
)
4019 scsi_block_requests(pinstance
->host
);
4021 retval
= pmcraid_ioctl_passthrough(pinstance
, cmd
,
4022 hdr
->buffer_length
, argp
);
4024 if (cmd
== PMCRAID_IOCTL_DOWNLOAD_MICROCODE
)
4025 scsi_unblock_requests(pinstance
->host
);
4028 case PMCRAID_DRIVER_IOCTL
:
4029 arg
+= sizeof(struct pmcraid_ioctl_header
);
4030 retval
= pmcraid_ioctl_driver(pinstance
, cmd
,
4031 hdr
->buffer_length
, argp
);
4045 * File operations structure for management interface
4047 static const struct file_operations pmcraid_fops
= {
4048 .owner
= THIS_MODULE
,
4049 .open
= pmcraid_chr_open
,
4050 .fasync
= pmcraid_chr_fasync
,
4051 .unlocked_ioctl
= pmcraid_chr_ioctl
,
4052 #ifdef CONFIG_COMPAT
4053 .compat_ioctl
= pmcraid_chr_ioctl
,
4055 .llseek
= noop_llseek
,
4062 * pmcraid_show_log_level - Display adapter's error logging level
4063 * @dev: class device struct
4067 * number of bytes printed to buffer
4069 static ssize_t
pmcraid_show_log_level(
4071 struct device_attribute
*attr
,
4074 struct Scsi_Host
*shost
= class_to_shost(dev
);
4075 struct pmcraid_instance
*pinstance
=
4076 (struct pmcraid_instance
*)shost
->hostdata
;
4077 return snprintf(buf
, PAGE_SIZE
, "%d\n", pinstance
->current_log_level
);
4081 * pmcraid_store_log_level - Change the adapter's error logging level
4082 * @dev: class device struct
4087 * number of bytes printed to buffer
4089 static ssize_t
pmcraid_store_log_level(
4091 struct device_attribute
*attr
,
4096 struct Scsi_Host
*shost
;
4097 struct pmcraid_instance
*pinstance
;
4100 if (kstrtou8(buf
, 10, &val
))
4102 /* log-level should be from 0 to 2 */
4106 shost
= class_to_shost(dev
);
4107 pinstance
= (struct pmcraid_instance
*)shost
->hostdata
;
4108 pinstance
->current_log_level
= val
;
4113 static struct device_attribute pmcraid_log_level_attr
= {
4115 .name
= "log_level",
4116 .mode
= S_IRUGO
| S_IWUSR
,
4118 .show
= pmcraid_show_log_level
,
4119 .store
= pmcraid_store_log_level
,
4123 * pmcraid_show_drv_version - Display driver version
4124 * @dev: class device struct
4128 * number of bytes printed to buffer
4130 static ssize_t
pmcraid_show_drv_version(
4132 struct device_attribute
*attr
,
4136 return snprintf(buf
, PAGE_SIZE
, "version: %s\n",
4137 PMCRAID_DRIVER_VERSION
);
4140 static struct device_attribute pmcraid_driver_version_attr
= {
4142 .name
= "drv_version",
4145 .show
= pmcraid_show_drv_version
,
4149 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4150 * @dev: class device struct
4154 * number of bytes printed to buffer
4156 static ssize_t
pmcraid_show_adapter_id(
4158 struct device_attribute
*attr
,
4162 struct Scsi_Host
*shost
= class_to_shost(dev
);
4163 struct pmcraid_instance
*pinstance
=
4164 (struct pmcraid_instance
*)shost
->hostdata
;
4165 u32 adapter_id
= (pinstance
->pdev
->bus
->number
<< 8) |
4166 pinstance
->pdev
->devfn
;
4167 u32 aen_group
= pmcraid_event_family
.id
;
4169 return snprintf(buf
, PAGE_SIZE
,
4170 "adapter id: %d\nminor: %d\naen group: %d\n",
4171 adapter_id
, MINOR(pinstance
->cdev
.dev
), aen_group
);
4174 static struct device_attribute pmcraid_adapter_id_attr
= {
4176 .name
= "adapter_id",
4179 .show
= pmcraid_show_adapter_id
,
4182 static struct device_attribute
*pmcraid_host_attrs
[] = {
4183 &pmcraid_log_level_attr
,
4184 &pmcraid_driver_version_attr
,
4185 &pmcraid_adapter_id_attr
,
4190 /* host template structure for pmcraid driver */
4191 static struct scsi_host_template pmcraid_host_template
= {
4192 .module
= THIS_MODULE
,
4193 .name
= PMCRAID_DRIVER_NAME
,
4194 .queuecommand
= pmcraid_queuecommand
,
4195 .eh_abort_handler
= pmcraid_eh_abort_handler
,
4196 .eh_bus_reset_handler
= pmcraid_eh_bus_reset_handler
,
4197 .eh_target_reset_handler
= pmcraid_eh_target_reset_handler
,
4198 .eh_device_reset_handler
= pmcraid_eh_device_reset_handler
,
4199 .eh_host_reset_handler
= pmcraid_eh_host_reset_handler
,
4201 .slave_alloc
= pmcraid_slave_alloc
,
4202 .slave_configure
= pmcraid_slave_configure
,
4203 .slave_destroy
= pmcraid_slave_destroy
,
4204 .change_queue_depth
= pmcraid_change_queue_depth
,
4205 .can_queue
= PMCRAID_MAX_IO_CMD
,
4207 .sg_tablesize
= PMCRAID_MAX_IOADLS
,
4208 .max_sectors
= PMCRAID_IOA_MAX_SECTORS
,
4210 .cmd_per_lun
= PMCRAID_MAX_CMD_PER_LUN
,
4211 .use_clustering
= ENABLE_CLUSTERING
,
4212 .shost_attrs
= pmcraid_host_attrs
,
4213 .proc_name
= PMCRAID_DRIVER_NAME
,
4217 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4218 * @irq: interrupt vector number
4219 * @dev_id: pointer hrrq_vector
4222 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4225 static irqreturn_t
pmcraid_isr_msix(int irq
, void *dev_id
)
4227 struct pmcraid_isr_param
*hrrq_vector
;
4228 struct pmcraid_instance
*pinstance
;
4229 unsigned long lock_flags
;
4233 hrrq_vector
= (struct pmcraid_isr_param
*)dev_id
;
4234 hrrq_id
= hrrq_vector
->hrrq_id
;
4235 pinstance
= hrrq_vector
->drv_inst
;
4238 /* Read the interrupt */
4239 intrs_val
= pmcraid_read_interrupts(pinstance
);
4241 ((ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
)
4242 & DOORBELL_INTR_MSIX_CLR
) == 0)) {
4243 /* Any error interrupts including unit_check,
4244 * initiate IOA reset.In case of unit check indicate
4245 * to reset_sequence that IOA unit checked and prepare
4246 * for a dump during reset sequence
4248 if (intrs_val
& PMCRAID_ERROR_INTERRUPTS
) {
4249 if (intrs_val
& INTRS_IOA_UNIT_CHECK
)
4250 pinstance
->ioa_unit_check
= 1;
4252 pmcraid_err("ISR: error interrupts: %x \
4253 initiating reset\n", intrs_val
);
4254 spin_lock_irqsave(pinstance
->host
->host_lock
,
4256 pmcraid_initiate_reset(pinstance
);
4257 spin_unlock_irqrestore(
4258 pinstance
->host
->host_lock
,
4261 /* If interrupt was as part of the ioa initialization,
4262 * clear it. Delete the timer and wakeup the
4263 * reset engine to proceed with reset sequence
4265 if (intrs_val
& INTRS_TRANSITION_TO_OPERATIONAL
)
4266 pmcraid_clr_trans_op(pinstance
);
4268 /* Clear the interrupt register by writing
4269 * to host to ioa doorbell. Once done
4270 * FW will clear the interrupt.
4272 iowrite32(DOORBELL_INTR_MSIX_CLR
,
4273 pinstance
->int_regs
.host_ioa_interrupt_reg
);
4274 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
4280 tasklet_schedule(&(pinstance
->isr_tasklet
[hrrq_id
]));
4286 * pmcraid_isr - implements legacy interrupt handling routine
4288 * @irq: interrupt vector number
4289 * @dev_id: pointer hrrq_vector
4292 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4294 static irqreturn_t
pmcraid_isr(int irq
, void *dev_id
)
4296 struct pmcraid_isr_param
*hrrq_vector
;
4297 struct pmcraid_instance
*pinstance
;
4299 unsigned long lock_flags
;
4302 /* In case of legacy interrupt mode where interrupts are shared across
4303 * isrs, it may be possible that the current interrupt is not from IOA
4306 printk(KERN_INFO
"%s(): NULL host pointer\n", __func__
);
4309 hrrq_vector
= (struct pmcraid_isr_param
*)dev_id
;
4310 pinstance
= hrrq_vector
->drv_inst
;
4312 intrs
= pmcraid_read_interrupts(pinstance
);
4314 if (unlikely((intrs
& PMCRAID_PCI_INTERRUPTS
) == 0))
4317 /* Any error interrupts including unit_check, initiate IOA reset.
4318 * In case of unit check indicate to reset_sequence that IOA unit
4319 * checked and prepare for a dump during reset sequence
4321 if (intrs
& PMCRAID_ERROR_INTERRUPTS
) {
4323 if (intrs
& INTRS_IOA_UNIT_CHECK
)
4324 pinstance
->ioa_unit_check
= 1;
4327 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4328 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4331 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4332 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
4333 pmcraid_initiate_reset(pinstance
);
4334 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
4336 /* If interrupt was as part of the ioa initialization,
4337 * clear. Delete the timer and wakeup the
4338 * reset engine to proceed with reset sequence
4340 if (intrs
& INTRS_TRANSITION_TO_OPERATIONAL
) {
4341 pmcraid_clr_trans_op(pinstance
);
4344 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4346 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4349 &(pinstance
->isr_tasklet
[hrrq_id
]));
4358 * pmcraid_worker_function - worker thread function
4360 * @workp: pointer to struct work queue
4366 static void pmcraid_worker_function(struct work_struct
*workp
)
4368 struct pmcraid_instance
*pinstance
;
4369 struct pmcraid_resource_entry
*res
;
4370 struct pmcraid_resource_entry
*temp
;
4371 struct scsi_device
*sdev
;
4372 unsigned long lock_flags
;
4373 unsigned long host_lock_flags
;
4375 u8 bus
, target
, lun
;
4377 pinstance
= container_of(workp
, struct pmcraid_instance
, worker_q
);
4378 /* add resources only after host is added into system */
4379 if (!atomic_read(&pinstance
->expose_resources
))
4382 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
4384 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
4385 list_for_each_entry_safe(res
, temp
, &pinstance
->used_res_q
, queue
) {
4387 if (res
->change_detected
== RES_CHANGE_DEL
&& res
->scsi_dev
) {
4388 sdev
= res
->scsi_dev
;
4390 /* host_lock must be held before calling
4393 spin_lock_irqsave(pinstance
->host
->host_lock
,
4395 if (!scsi_device_get(sdev
)) {
4396 spin_unlock_irqrestore(
4397 pinstance
->host
->host_lock
,
4399 pmcraid_info("deleting %x from midlayer\n",
4400 res
->cfg_entry
.resource_address
);
4401 list_move_tail(&res
->queue
,
4402 &pinstance
->free_res_q
);
4403 spin_unlock_irqrestore(
4404 &pinstance
->resource_lock
,
4406 scsi_remove_device(sdev
);
4407 scsi_device_put(sdev
);
4408 spin_lock_irqsave(&pinstance
->resource_lock
,
4410 res
->change_detected
= 0;
4412 spin_unlock_irqrestore(
4413 pinstance
->host
->host_lock
,
4419 list_for_each_entry(res
, &pinstance
->used_res_q
, queue
) {
4421 if (res
->change_detected
== RES_CHANGE_ADD
) {
4423 if (!pmcraid_expose_resource(fw_version
,
4427 if (RES_IS_VSET(res
->cfg_entry
)) {
4428 bus
= PMCRAID_VSET_BUS_ID
;
4429 if (fw_version
<= PMCRAID_FW_VERSION_1
)
4430 target
= res
->cfg_entry
.unique_flags1
;
4432 target
= le16_to_cpu(res
->cfg_entry
.array_id
) & 0xFF;
4433 lun
= PMCRAID_VSET_LUN_ID
;
4435 bus
= PMCRAID_PHYS_BUS_ID
;
4438 res
->cfg_entry
.resource_address
);
4439 lun
= RES_LUN(res
->cfg_entry
.resource_address
);
4442 res
->change_detected
= 0;
4443 spin_unlock_irqrestore(&pinstance
->resource_lock
,
4445 scsi_add_device(pinstance
->host
, bus
, target
, lun
);
4446 spin_lock_irqsave(&pinstance
->resource_lock
,
4451 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
4455 * pmcraid_tasklet_function - Tasklet function
4457 * @instance: pointer to msix param structure
4462 static void pmcraid_tasklet_function(unsigned long instance
)
4464 struct pmcraid_isr_param
*hrrq_vector
;
4465 struct pmcraid_instance
*pinstance
;
4466 unsigned long hrrq_lock_flags
;
4467 unsigned long pending_lock_flags
;
4468 unsigned long host_lock_flags
;
4469 spinlock_t
*lockp
; /* hrrq buffer lock */
4473 hrrq_vector
= (struct pmcraid_isr_param
*)instance
;
4474 pinstance
= hrrq_vector
->drv_inst
;
4475 id
= hrrq_vector
->hrrq_id
;
4476 lockp
= &(pinstance
->hrrq_lock
[id
]);
4478 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4479 * protected by its own lock. Traversals must be done within this lock
4480 * as there may be multiple tasklets running on multiple CPUs. Note
4481 * that the lock is held just for picking up the response handle and
4482 * manipulating hrrq_curr/toggle_bit values.
4484 spin_lock_irqsave(lockp
, hrrq_lock_flags
);
4486 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4488 while ((resp
& HRRQ_TOGGLE_BIT
) ==
4489 pinstance
->host_toggle_bit
[id
]) {
4491 int cmd_index
= resp
>> 2;
4492 struct pmcraid_cmd
*cmd
= NULL
;
4494 if (pinstance
->hrrq_curr
[id
] < pinstance
->hrrq_end
[id
]) {
4495 pinstance
->hrrq_curr
[id
]++;
4497 pinstance
->hrrq_curr
[id
] = pinstance
->hrrq_start
[id
];
4498 pinstance
->host_toggle_bit
[id
] ^= 1u;
4501 if (cmd_index
>= PMCRAID_MAX_CMD
) {
4502 /* In case of invalid response handle, log message */
4503 pmcraid_err("Invalid response handle %d\n", cmd_index
);
4504 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4508 cmd
= pinstance
->cmd_list
[cmd_index
];
4509 spin_unlock_irqrestore(lockp
, hrrq_lock_flags
);
4511 spin_lock_irqsave(&pinstance
->pending_pool_lock
,
4512 pending_lock_flags
);
4513 list_del(&cmd
->free_list
);
4514 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
,
4515 pending_lock_flags
);
4516 del_timer(&cmd
->timer
);
4517 atomic_dec(&pinstance
->outstanding_cmds
);
4519 if (cmd
->cmd_done
== pmcraid_ioa_reset
) {
4520 spin_lock_irqsave(pinstance
->host
->host_lock
,
4523 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
4525 } else if (cmd
->cmd_done
!= NULL
) {
4528 /* loop over until we are done with all responses */
4529 spin_lock_irqsave(lockp
, hrrq_lock_flags
);
4530 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4533 spin_unlock_irqrestore(lockp
, hrrq_lock_flags
);
4537 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4538 * @pinstance: pointer to adapter instance structure
4540 * This routine un-registers registered interrupt handler and
4541 * also frees irqs/vectors.
4547 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance
*pinstance
)
4549 struct pci_dev
*pdev
= pinstance
->pdev
;
4552 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
4553 free_irq(pci_irq_vector(pdev
, i
), &pinstance
->hrrq_vector
[i
]);
4555 pinstance
->interrupt_mode
= 0;
4556 pci_free_irq_vectors(pdev
);
4560 * pmcraid_register_interrupt_handler - registers interrupt handler
4561 * @pinstance: pointer to per-adapter instance structure
4564 * 0 on success, non-zero error code otherwise.
4567 pmcraid_register_interrupt_handler(struct pmcraid_instance
*pinstance
)
4569 struct pci_dev
*pdev
= pinstance
->pdev
;
4570 unsigned int irq_flag
= PCI_IRQ_LEGACY
, flag
;
4571 int num_hrrq
, rc
, i
;
4574 if (pmcraid_enable_msix
)
4575 irq_flag
|= PCI_IRQ_MSIX
;
4577 num_hrrq
= pci_alloc_irq_vectors(pdev
, 1, PMCRAID_NUM_MSIX_VECTORS
,
4582 if (pdev
->msix_enabled
) {
4584 isr
= pmcraid_isr_msix
;
4590 for (i
= 0; i
< num_hrrq
; i
++) {
4591 struct pmcraid_isr_param
*vec
= &pinstance
->hrrq_vector
[i
];
4594 vec
->drv_inst
= pinstance
;
4595 rc
= request_irq(pci_irq_vector(pdev
, i
), isr
, flag
,
4596 PMCRAID_DRIVER_NAME
, vec
);
4601 pinstance
->num_hrrq
= num_hrrq
;
4602 if (pdev
->msix_enabled
) {
4603 pinstance
->interrupt_mode
= 1;
4604 iowrite32(DOORBELL_INTR_MODE_MSIX
,
4605 pinstance
->int_regs
.host_ioa_interrupt_reg
);
4606 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
4613 free_irq(pci_irq_vector(pdev
, i
), &pinstance
->hrrq_vector
[i
]);
4614 pci_free_irq_vectors(pdev
);
4619 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4620 * @pinstance: per adapter instance structure pointer
4621 * @max_index: number of buffer blocks to release
4627 pmcraid_release_cmd_blocks(struct pmcraid_instance
*pinstance
, int max_index
)
4630 for (i
= 0; i
< max_index
; i
++) {
4631 kmem_cache_free(pinstance
->cmd_cachep
, pinstance
->cmd_list
[i
]);
4632 pinstance
->cmd_list
[i
] = NULL
;
4634 kmem_cache_destroy(pinstance
->cmd_cachep
);
4635 pinstance
->cmd_cachep
= NULL
;
4639 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4640 * @pinstance: pointer to per adapter instance structure
4641 * @max_index: number of buffers (from 0 onwards) to release
4643 * This function assumes that the command blocks for which control blocks are
4644 * linked are not released.
4650 pmcraid_release_control_blocks(
4651 struct pmcraid_instance
*pinstance
,
4657 if (pinstance
->control_pool
== NULL
)
4660 for (i
= 0; i
< max_index
; i
++) {
4661 pci_pool_free(pinstance
->control_pool
,
4662 pinstance
->cmd_list
[i
]->ioa_cb
,
4663 pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
);
4664 pinstance
->cmd_list
[i
]->ioa_cb
= NULL
;
4665 pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
= 0;
4667 pci_pool_destroy(pinstance
->control_pool
);
4668 pinstance
->control_pool
= NULL
;
4672 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4673 * @pinstance - pointer to per adapter instance structure
4675 * Allocates memory for command blocks using kernel slab allocator.
4678 * 0 in case of success; -ENOMEM in case of failure
4680 static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance
*pinstance
)
4684 sprintf(pinstance
->cmd_pool_name
, "pmcraid_cmd_pool_%d",
4685 pinstance
->host
->unique_id
);
4688 pinstance
->cmd_cachep
= kmem_cache_create(
4689 pinstance
->cmd_pool_name
,
4690 sizeof(struct pmcraid_cmd
), 0,
4691 SLAB_HWCACHE_ALIGN
, NULL
);
4692 if (!pinstance
->cmd_cachep
)
4695 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
4696 pinstance
->cmd_list
[i
] =
4697 kmem_cache_alloc(pinstance
->cmd_cachep
, GFP_KERNEL
);
4698 if (!pinstance
->cmd_list
[i
]) {
4699 pmcraid_release_cmd_blocks(pinstance
, i
);
4707 * pmcraid_allocate_control_blocks - allocates memory control blocks
4708 * @pinstance : pointer to per adapter instance structure
4710 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4711 * and IOASAs. This is called after command blocks are already allocated.
4714 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4716 static int pmcraid_allocate_control_blocks(struct pmcraid_instance
*pinstance
)
4720 sprintf(pinstance
->ctl_pool_name
, "pmcraid_control_pool_%d",
4721 pinstance
->host
->unique_id
);
4723 pinstance
->control_pool
=
4724 pci_pool_create(pinstance
->ctl_pool_name
,
4726 sizeof(struct pmcraid_control_block
),
4727 PMCRAID_IOARCB_ALIGNMENT
, 0);
4729 if (!pinstance
->control_pool
)
4732 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
4733 pinstance
->cmd_list
[i
]->ioa_cb
=
4735 pinstance
->control_pool
,
4737 &(pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
));
4739 if (!pinstance
->cmd_list
[i
]->ioa_cb
) {
4740 pmcraid_release_control_blocks(pinstance
, i
);
4743 memset(pinstance
->cmd_list
[i
]->ioa_cb
, 0,
4744 sizeof(struct pmcraid_control_block
));
4750 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4751 * @pinstance: pointer to per adapter instance structure
4752 * @maxindex: size of hrrq buffer pointer array
4758 pmcraid_release_host_rrqs(struct pmcraid_instance
*pinstance
, int maxindex
)
4761 for (i
= 0; i
< maxindex
; i
++) {
4763 pci_free_consistent(pinstance
->pdev
,
4764 HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
,
4765 pinstance
->hrrq_start
[i
],
4766 pinstance
->hrrq_start_bus_addr
[i
]);
4768 /* reset pointers and toggle bit to zeros */
4769 pinstance
->hrrq_start
[i
] = NULL
;
4770 pinstance
->hrrq_start_bus_addr
[i
] = 0;
4771 pinstance
->host_toggle_bit
[i
] = 0;
4776 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4777 * @pinstance: pointer to per adapter instance structure
4780 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4782 static int pmcraid_allocate_host_rrqs(struct pmcraid_instance
*pinstance
)
4786 buffer_size
= HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
;
4788 for (i
= 0; i
< pinstance
->num_hrrq
; i
++) {
4789 pinstance
->hrrq_start
[i
] =
4790 pci_alloc_consistent(
4793 &(pinstance
->hrrq_start_bus_addr
[i
]));
4795 if (!pinstance
->hrrq_start
[i
]) {
4796 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4798 pmcraid_release_host_rrqs(pinstance
, i
);
4802 memset(pinstance
->hrrq_start
[i
], 0, buffer_size
);
4803 pinstance
->hrrq_curr
[i
] = pinstance
->hrrq_start
[i
];
4804 pinstance
->hrrq_end
[i
] =
4805 pinstance
->hrrq_start
[i
] + PMCRAID_MAX_CMD
- 1;
4806 pinstance
->host_toggle_bit
[i
] = 1;
4807 spin_lock_init(&pinstance
->hrrq_lock
[i
]);
4813 * pmcraid_release_hcams - release HCAM buffers
4815 * @pinstance: pointer to per adapter instance structure
4820 static void pmcraid_release_hcams(struct pmcraid_instance
*pinstance
)
4822 if (pinstance
->ccn
.msg
!= NULL
) {
4823 pci_free_consistent(pinstance
->pdev
,
4824 PMCRAID_AEN_HDR_SIZE
+
4825 sizeof(struct pmcraid_hcam_ccn_ext
),
4827 pinstance
->ccn
.baddr
);
4829 pinstance
->ccn
.msg
= NULL
;
4830 pinstance
->ccn
.hcam
= NULL
;
4831 pinstance
->ccn
.baddr
= 0;
4834 if (pinstance
->ldn
.msg
!= NULL
) {
4835 pci_free_consistent(pinstance
->pdev
,
4836 PMCRAID_AEN_HDR_SIZE
+
4837 sizeof(struct pmcraid_hcam_ldn
),
4839 pinstance
->ldn
.baddr
);
4841 pinstance
->ldn
.msg
= NULL
;
4842 pinstance
->ldn
.hcam
= NULL
;
4843 pinstance
->ldn
.baddr
= 0;
4848 * pmcraid_allocate_hcams - allocates HCAM buffers
4849 * @pinstance : pointer to per adapter instance structure
4852 * 0 in case of successful allocation, non-zero otherwise
4854 static int pmcraid_allocate_hcams(struct pmcraid_instance
*pinstance
)
4856 pinstance
->ccn
.msg
= pci_alloc_consistent(
4858 PMCRAID_AEN_HDR_SIZE
+
4859 sizeof(struct pmcraid_hcam_ccn_ext
),
4860 &(pinstance
->ccn
.baddr
));
4862 pinstance
->ldn
.msg
= pci_alloc_consistent(
4864 PMCRAID_AEN_HDR_SIZE
+
4865 sizeof(struct pmcraid_hcam_ldn
),
4866 &(pinstance
->ldn
.baddr
));
4868 if (pinstance
->ldn
.msg
== NULL
|| pinstance
->ccn
.msg
== NULL
) {
4869 pmcraid_release_hcams(pinstance
);
4871 pinstance
->ccn
.hcam
=
4872 (void *)pinstance
->ccn
.msg
+ PMCRAID_AEN_HDR_SIZE
;
4873 pinstance
->ldn
.hcam
=
4874 (void *)pinstance
->ldn
.msg
+ PMCRAID_AEN_HDR_SIZE
;
4876 atomic_set(&pinstance
->ccn
.ignore
, 0);
4877 atomic_set(&pinstance
->ldn
.ignore
, 0);
4880 return (pinstance
->ldn
.msg
== NULL
) ? -ENOMEM
: 0;
4884 * pmcraid_release_config_buffers - release config.table buffers
4885 * @pinstance: pointer to per adapter instance structure
4890 static void pmcraid_release_config_buffers(struct pmcraid_instance
*pinstance
)
4892 if (pinstance
->cfg_table
!= NULL
&&
4893 pinstance
->cfg_table_bus_addr
!= 0) {
4894 pci_free_consistent(pinstance
->pdev
,
4895 sizeof(struct pmcraid_config_table
),
4896 pinstance
->cfg_table
,
4897 pinstance
->cfg_table_bus_addr
);
4898 pinstance
->cfg_table
= NULL
;
4899 pinstance
->cfg_table_bus_addr
= 0;
4902 if (pinstance
->res_entries
!= NULL
) {
4905 for (i
= 0; i
< PMCRAID_MAX_RESOURCES
; i
++)
4906 list_del(&pinstance
->res_entries
[i
].queue
);
4907 kfree(pinstance
->res_entries
);
4908 pinstance
->res_entries
= NULL
;
4911 pmcraid_release_hcams(pinstance
);
4915 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
4916 * @pinstance : pointer to per adapter instance structure
4919 * 0 for successful allocation, -ENOMEM for any failure
4921 static int pmcraid_allocate_config_buffers(struct pmcraid_instance
*pinstance
)
4925 pinstance
->res_entries
=
4926 kzalloc(sizeof(struct pmcraid_resource_entry
) *
4927 PMCRAID_MAX_RESOURCES
, GFP_KERNEL
);
4929 if (NULL
== pinstance
->res_entries
) {
4930 pmcraid_err("failed to allocate memory for resource table\n");
4934 for (i
= 0; i
< PMCRAID_MAX_RESOURCES
; i
++)
4935 list_add_tail(&pinstance
->res_entries
[i
].queue
,
4936 &pinstance
->free_res_q
);
4938 pinstance
->cfg_table
=
4939 pci_alloc_consistent(pinstance
->pdev
,
4940 sizeof(struct pmcraid_config_table
),
4941 &pinstance
->cfg_table_bus_addr
);
4943 if (NULL
== pinstance
->cfg_table
) {
4944 pmcraid_err("couldn't alloc DMA memory for config table\n");
4945 pmcraid_release_config_buffers(pinstance
);
4949 if (pmcraid_allocate_hcams(pinstance
)) {
4950 pmcraid_err("could not alloc DMA memory for HCAMS\n");
4951 pmcraid_release_config_buffers(pinstance
);
4959 * pmcraid_init_tasklets - registers tasklets for response handling
4961 * @pinstance: pointer adapter instance structure
4966 static void pmcraid_init_tasklets(struct pmcraid_instance
*pinstance
)
4969 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
4970 tasklet_init(&pinstance
->isr_tasklet
[i
],
4971 pmcraid_tasklet_function
,
4972 (unsigned long)&pinstance
->hrrq_vector
[i
]);
4976 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
4978 * @pinstance: pointer to adapter instance structure
4983 static void pmcraid_kill_tasklets(struct pmcraid_instance
*pinstance
)
4986 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
4987 tasklet_kill(&pinstance
->isr_tasklet
[i
]);
4991 * pmcraid_release_buffers - release per-adapter buffers allocated
4993 * @pinstance: pointer to adapter soft state
4998 static void pmcraid_release_buffers(struct pmcraid_instance
*pinstance
)
5000 pmcraid_release_config_buffers(pinstance
);
5001 pmcraid_release_control_blocks(pinstance
, PMCRAID_MAX_CMD
);
5002 pmcraid_release_cmd_blocks(pinstance
, PMCRAID_MAX_CMD
);
5003 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5005 if (pinstance
->inq_data
!= NULL
) {
5006 pci_free_consistent(pinstance
->pdev
,
5007 sizeof(struct pmcraid_inquiry_data
),
5008 pinstance
->inq_data
,
5009 pinstance
->inq_data_baddr
);
5011 pinstance
->inq_data
= NULL
;
5012 pinstance
->inq_data_baddr
= 0;
5015 if (pinstance
->timestamp_data
!= NULL
) {
5016 pci_free_consistent(pinstance
->pdev
,
5017 sizeof(struct pmcraid_timestamp_data
),
5018 pinstance
->timestamp_data
,
5019 pinstance
->timestamp_data_baddr
);
5021 pinstance
->timestamp_data
= NULL
;
5022 pinstance
->timestamp_data_baddr
= 0;
5027 * pmcraid_init_buffers - allocates memory and initializes various structures
5028 * @pinstance: pointer to per adapter instance structure
5030 * This routine pre-allocates memory based on the type of block as below:
5031 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5032 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5033 * config-table entries : DMAable memory using pci_alloc_consistent
5034 * HostRRQs : DMAable memory, using pci_alloc_consistent
5037 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5039 static int pmcraid_init_buffers(struct pmcraid_instance
*pinstance
)
5043 if (pmcraid_allocate_host_rrqs(pinstance
)) {
5044 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5045 pinstance
->num_hrrq
);
5049 if (pmcraid_allocate_config_buffers(pinstance
)) {
5050 pmcraid_err("couldn't allocate memory for config buffers\n");
5051 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5055 if (pmcraid_allocate_cmd_blocks(pinstance
)) {
5056 pmcraid_err("couldn't allocate memory for cmd blocks\n");
5057 pmcraid_release_config_buffers(pinstance
);
5058 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5062 if (pmcraid_allocate_control_blocks(pinstance
)) {
5063 pmcraid_err("couldn't allocate memory control blocks\n");
5064 pmcraid_release_config_buffers(pinstance
);
5065 pmcraid_release_cmd_blocks(pinstance
, PMCRAID_MAX_CMD
);
5066 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5070 /* allocate DMAable memory for page D0 INQUIRY buffer */
5071 pinstance
->inq_data
= pci_alloc_consistent(
5073 sizeof(struct pmcraid_inquiry_data
),
5074 &pinstance
->inq_data_baddr
);
5076 if (pinstance
->inq_data
== NULL
) {
5077 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5078 pmcraid_release_buffers(pinstance
);
5082 /* allocate DMAable memory for set timestamp data buffer */
5083 pinstance
->timestamp_data
= pci_alloc_consistent(
5085 sizeof(struct pmcraid_timestamp_data
),
5086 &pinstance
->timestamp_data_baddr
);
5088 if (pinstance
->timestamp_data
== NULL
) {
5089 pmcraid_err("couldn't allocate DMA memory for \
5090 set time_stamp \n");
5091 pmcraid_release_buffers(pinstance
);
5096 /* Initialize all the command blocks and add them to free pool. No
5097 * need to lock (free_pool_lock) as this is done in initialization
5100 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
5101 struct pmcraid_cmd
*cmdp
= pinstance
->cmd_list
[i
];
5102 pmcraid_init_cmdblk(cmdp
, i
);
5103 cmdp
->drv_inst
= pinstance
;
5104 list_add_tail(&cmdp
->free_list
, &pinstance
->free_cmd_pool
);
5111 * pmcraid_reinit_buffers - resets various buffer pointers
5112 * @pinstance: pointer to adapter instance
5116 static void pmcraid_reinit_buffers(struct pmcraid_instance
*pinstance
)
5119 int buffer_size
= HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
;
5121 for (i
= 0; i
< pinstance
->num_hrrq
; i
++) {
5122 memset(pinstance
->hrrq_start
[i
], 0, buffer_size
);
5123 pinstance
->hrrq_curr
[i
] = pinstance
->hrrq_start
[i
];
5124 pinstance
->hrrq_end
[i
] =
5125 pinstance
->hrrq_start
[i
] + PMCRAID_MAX_CMD
- 1;
5126 pinstance
->host_toggle_bit
[i
] = 1;
5131 * pmcraid_init_instance - initialize per instance data structure
5132 * @pdev: pointer to pci device structure
5133 * @host: pointer to Scsi_Host structure
5134 * @mapped_pci_addr: memory mapped IOA configuration registers
5137 * 0 on success, non-zero in case of any failure
5139 static int pmcraid_init_instance(struct pci_dev
*pdev
, struct Scsi_Host
*host
,
5140 void __iomem
*mapped_pci_addr
)
5142 struct pmcraid_instance
*pinstance
=
5143 (struct pmcraid_instance
*)host
->hostdata
;
5145 pinstance
->host
= host
;
5146 pinstance
->pdev
= pdev
;
5148 /* Initialize register addresses */
5149 pinstance
->mapped_dma_addr
= mapped_pci_addr
;
5151 /* Initialize chip-specific details */
5153 struct pmcraid_chip_details
*chip_cfg
= pinstance
->chip_cfg
;
5154 struct pmcraid_interrupts
*pint_regs
= &pinstance
->int_regs
;
5156 pinstance
->ioarrin
= mapped_pci_addr
+ chip_cfg
->ioarrin
;
5158 pint_regs
->ioa_host_interrupt_reg
=
5159 mapped_pci_addr
+ chip_cfg
->ioa_host_intr
;
5160 pint_regs
->ioa_host_interrupt_clr_reg
=
5161 mapped_pci_addr
+ chip_cfg
->ioa_host_intr_clr
;
5162 pint_regs
->ioa_host_msix_interrupt_reg
=
5163 mapped_pci_addr
+ chip_cfg
->ioa_host_msix_intr
;
5164 pint_regs
->host_ioa_interrupt_reg
=
5165 mapped_pci_addr
+ chip_cfg
->host_ioa_intr
;
5166 pint_regs
->host_ioa_interrupt_clr_reg
=
5167 mapped_pci_addr
+ chip_cfg
->host_ioa_intr_clr
;
5169 /* Current version of firmware exposes interrupt mask set
5170 * and mask clr registers through memory mapped bar0.
5172 pinstance
->mailbox
= mapped_pci_addr
+ chip_cfg
->mailbox
;
5173 pinstance
->ioa_status
= mapped_pci_addr
+ chip_cfg
->ioastatus
;
5174 pint_regs
->ioa_host_interrupt_mask_reg
=
5175 mapped_pci_addr
+ chip_cfg
->ioa_host_mask
;
5176 pint_regs
->ioa_host_interrupt_mask_clr_reg
=
5177 mapped_pci_addr
+ chip_cfg
->ioa_host_mask_clr
;
5178 pint_regs
->global_interrupt_mask_reg
=
5179 mapped_pci_addr
+ chip_cfg
->global_intr_mask
;
5182 pinstance
->ioa_reset_attempts
= 0;
5183 init_waitqueue_head(&pinstance
->reset_wait_q
);
5185 atomic_set(&pinstance
->outstanding_cmds
, 0);
5186 atomic_set(&pinstance
->last_message_id
, 0);
5187 atomic_set(&pinstance
->expose_resources
, 0);
5189 INIT_LIST_HEAD(&pinstance
->free_res_q
);
5190 INIT_LIST_HEAD(&pinstance
->used_res_q
);
5191 INIT_LIST_HEAD(&pinstance
->free_cmd_pool
);
5192 INIT_LIST_HEAD(&pinstance
->pending_cmd_pool
);
5194 spin_lock_init(&pinstance
->free_pool_lock
);
5195 spin_lock_init(&pinstance
->pending_pool_lock
);
5196 spin_lock_init(&pinstance
->resource_lock
);
5197 mutex_init(&pinstance
->aen_queue_lock
);
5199 /* Work-queue (Shared) for deferred processing error handling */
5200 INIT_WORK(&pinstance
->worker_q
, pmcraid_worker_function
);
5202 /* Initialize the default log_level */
5203 pinstance
->current_log_level
= pmcraid_log_level
;
5205 /* Setup variables required for reset engine */
5206 pinstance
->ioa_state
= IOA_STATE_UNKNOWN
;
5207 pinstance
->reset_cmd
= NULL
;
5212 * pmcraid_shutdown - shutdown adapter controller.
5213 * @pdev: pci device struct
5215 * Issues an adapter shutdown to the card waits for its completion
5220 static void pmcraid_shutdown(struct pci_dev
*pdev
)
5222 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5223 pmcraid_reset_bringdown(pinstance
);
5228 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5230 static unsigned short pmcraid_get_minor(void)
5234 minor
= find_first_zero_bit(pmcraid_minor
, sizeof(pmcraid_minor
));
5235 __set_bit(minor
, pmcraid_minor
);
5240 * pmcraid_release_minor - releases given minor back to minor number bitmap
5242 static void pmcraid_release_minor(unsigned short minor
)
5244 __clear_bit(minor
, pmcraid_minor
);
5248 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5250 * @pinstance: pointer to adapter instance for which to register device
5253 * 0 in case of success, otherwise non-zero
5255 static int pmcraid_setup_chrdev(struct pmcraid_instance
*pinstance
)
5260 minor
= pmcraid_get_minor();
5261 cdev_init(&pinstance
->cdev
, &pmcraid_fops
);
5262 pinstance
->cdev
.owner
= THIS_MODULE
;
5264 error
= cdev_add(&pinstance
->cdev
, MKDEV(pmcraid_major
, minor
), 1);
5267 pmcraid_release_minor(minor
);
5269 device_create(pmcraid_class
, NULL
, MKDEV(pmcraid_major
, minor
),
5270 NULL
, "%s%u", PMCRAID_DEVFILE
, minor
);
5275 * pmcraid_release_chrdev - unregisters per-adapter management interface
5277 * @pinstance: pointer to adapter instance structure
5282 static void pmcraid_release_chrdev(struct pmcraid_instance
*pinstance
)
5284 pmcraid_release_minor(MINOR(pinstance
->cdev
.dev
));
5285 device_destroy(pmcraid_class
,
5286 MKDEV(pmcraid_major
, MINOR(pinstance
->cdev
.dev
)));
5287 cdev_del(&pinstance
->cdev
);
5291 * pmcraid_remove - IOA hot plug remove entry point
5292 * @pdev: pci device struct
5297 static void pmcraid_remove(struct pci_dev
*pdev
)
5299 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5301 /* remove the management interface (/dev file) for this device */
5302 pmcraid_release_chrdev(pinstance
);
5304 /* remove host template from scsi midlayer */
5305 scsi_remove_host(pinstance
->host
);
5307 /* block requests from mid-layer */
5308 scsi_block_requests(pinstance
->host
);
5310 /* initiate shutdown adapter */
5311 pmcraid_shutdown(pdev
);
5313 pmcraid_disable_interrupts(pinstance
, ~0);
5314 flush_work(&pinstance
->worker_q
);
5316 pmcraid_kill_tasklets(pinstance
);
5317 pmcraid_unregister_interrupt_handler(pinstance
);
5318 pmcraid_release_buffers(pinstance
);
5319 iounmap(pinstance
->mapped_dma_addr
);
5320 pci_release_regions(pdev
);
5321 scsi_host_put(pinstance
->host
);
5322 pci_disable_device(pdev
);
5329 * pmcraid_suspend - driver suspend entry point for power management
5330 * @pdev: PCI device structure
5331 * @state: PCI power state to suspend routine
5333 * Return Value - 0 always
5335 static int pmcraid_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5337 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5339 pmcraid_shutdown(pdev
);
5340 pmcraid_disable_interrupts(pinstance
, ~0);
5341 pmcraid_kill_tasklets(pinstance
);
5342 pci_set_drvdata(pinstance
->pdev
, pinstance
);
5343 pmcraid_unregister_interrupt_handler(pinstance
);
5344 pci_save_state(pdev
);
5345 pci_disable_device(pdev
);
5346 pci_set_power_state(pdev
, pci_choose_state(pdev
, state
));
5352 * pmcraid_resume - driver resume entry point PCI power management
5353 * @pdev: PCI device structure
5355 * Return Value - 0 in case of success. Error code in case of any failure
5357 static int pmcraid_resume(struct pci_dev
*pdev
)
5359 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5360 struct Scsi_Host
*host
= pinstance
->host
;
5363 pci_set_power_state(pdev
, PCI_D0
);
5364 pci_enable_wake(pdev
, PCI_D0
, 0);
5365 pci_restore_state(pdev
);
5367 rc
= pci_enable_device(pdev
);
5370 dev_err(&pdev
->dev
, "resume: Enable device failed\n");
5374 pci_set_master(pdev
);
5376 if ((sizeof(dma_addr_t
) == 4) ||
5377 pci_set_dma_mask(pdev
, DMA_BIT_MASK(64)))
5378 rc
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
5381 rc
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
5384 dev_err(&pdev
->dev
, "resume: Failed to set PCI DMA mask\n");
5385 goto disable_device
;
5388 pmcraid_disable_interrupts(pinstance
, ~0);
5389 atomic_set(&pinstance
->outstanding_cmds
, 0);
5390 rc
= pmcraid_register_interrupt_handler(pinstance
);
5394 "resume: couldn't register interrupt handlers\n");
5399 pmcraid_init_tasklets(pinstance
);
5400 pmcraid_enable_interrupts(pinstance
, PMCRAID_PCI_INTERRUPTS
);
5402 /* Start with hard reset sequence which brings up IOA to operational
5403 * state as well as completes the reset sequence.
5405 pinstance
->ioa_hard_reset
= 1;
5407 /* Start IOA firmware initialization and bring card to Operational
5410 if (pmcraid_reset_bringup(pinstance
)) {
5411 dev_err(&pdev
->dev
, "couldn't initialize IOA\n");
5413 goto release_tasklets
;
5419 pmcraid_disable_interrupts(pinstance
, ~0);
5420 pmcraid_kill_tasklets(pinstance
);
5421 pmcraid_unregister_interrupt_handler(pinstance
);
5424 scsi_host_put(host
);
5427 pci_disable_device(pdev
);
5434 #define pmcraid_suspend NULL
5435 #define pmcraid_resume NULL
5437 #endif /* CONFIG_PM */
5440 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5441 * completion of the ioa reset
5442 * @cmd: pointer to reset command block
5444 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd
*cmd
)
5446 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5447 unsigned long flags
;
5449 spin_lock_irqsave(pinstance
->host
->host_lock
, flags
);
5450 pmcraid_ioa_reset(cmd
);
5451 spin_unlock_irqrestore(pinstance
->host
->host_lock
, flags
);
5452 scsi_unblock_requests(pinstance
->host
);
5453 schedule_work(&pinstance
->worker_q
);
5457 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5459 * @cmd: pointer to pmcraid_cmd structure
5462 * 0 for success or non-zero for failure cases
5464 static void pmcraid_set_supported_devs(struct pmcraid_cmd
*cmd
)
5466 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5467 void (*cmd_done
) (struct pmcraid_cmd
*) = pmcraid_complete_ioa_reset
;
5469 pmcraid_reinit_cmdblk(cmd
);
5471 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5472 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
5473 ioarcb
->cdb
[0] = PMCRAID_SET_SUPPORTED_DEVICES
;
5474 ioarcb
->cdb
[1] = ALL_DEVICES_SUPPORTED
;
5476 /* If this was called as part of resource table reinitialization due to
5477 * lost CCN, it is enough to return the command block back to free pool
5478 * as part of set_supported_devs completion function.
5480 if (cmd
->drv_inst
->reinit_cfg_table
) {
5481 cmd
->drv_inst
->reinit_cfg_table
= 0;
5483 cmd_done
= pmcraid_reinit_cfgtable_done
;
5486 /* we will be done with the reset sequence after set supported devices,
5487 * setup the done function to return the command block back to free
5490 pmcraid_send_cmd(cmd
,
5492 PMCRAID_SET_SUP_DEV_TIMEOUT
,
5493 pmcraid_timeout_handler
);
5498 * pmcraid_set_timestamp - set the timestamp to IOAFP
5500 * @cmd: pointer to pmcraid_cmd structure
5503 * 0 for success or non-zero for failure cases
5505 static void pmcraid_set_timestamp(struct pmcraid_cmd
*cmd
)
5507 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5508 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5509 __be32 time_stamp_len
= cpu_to_be32(PMCRAID_TIMESTAMP_LEN
);
5510 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
5513 timestamp
= ktime_get_real_seconds() * 1000;
5515 pinstance
->timestamp_data
->timestamp
[0] = (__u8
)(timestamp
);
5516 pinstance
->timestamp_data
->timestamp
[1] = (__u8
)((timestamp
) >> 8);
5517 pinstance
->timestamp_data
->timestamp
[2] = (__u8
)((timestamp
) >> 16);
5518 pinstance
->timestamp_data
->timestamp
[3] = (__u8
)((timestamp
) >> 24);
5519 pinstance
->timestamp_data
->timestamp
[4] = (__u8
)((timestamp
) >> 32);
5520 pinstance
->timestamp_data
->timestamp
[5] = (__u8
)((timestamp
) >> 40);
5522 pmcraid_reinit_cmdblk(cmd
);
5523 ioarcb
->request_type
= REQ_TYPE_SCSI
;
5524 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5525 ioarcb
->cdb
[0] = PMCRAID_SCSI_SET_TIMESTAMP
;
5526 ioarcb
->cdb
[1] = PMCRAID_SCSI_SERVICE_ACTION
;
5527 memcpy(&(ioarcb
->cdb
[6]), &time_stamp_len
, sizeof(time_stamp_len
));
5529 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
5530 offsetof(struct pmcraid_ioarcb
,
5531 add_data
.u
.ioadl
[0]));
5532 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
5533 ioarcb
->ioarcb_bus_addr
&= cpu_to_le64(~(0x1FULL
));
5535 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
5536 ioarcb
->request_flags0
|= TRANSFER_DIR_WRITE
;
5537 ioarcb
->data_transfer_length
=
5538 cpu_to_le32(sizeof(struct pmcraid_timestamp_data
));
5539 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
5540 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
5541 ioadl
->address
= cpu_to_le64(pinstance
->timestamp_data_baddr
);
5542 ioadl
->data_len
= cpu_to_le32(sizeof(struct pmcraid_timestamp_data
));
5544 if (!pinstance
->timestamp_error
) {
5545 pinstance
->timestamp_error
= 0;
5546 pmcraid_send_cmd(cmd
, pmcraid_set_supported_devs
,
5547 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5549 pmcraid_send_cmd(cmd
, pmcraid_return_cmd
,
5550 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5557 * pmcraid_init_res_table - Initialize the resource table
5558 * @cmd: pointer to pmcraid command struct
5560 * This function looks through the existing resource table, comparing
5561 * it with the config table. This function will take care of old/new
5562 * devices and schedule adding/removing them from the mid-layer
5568 static void pmcraid_init_res_table(struct pmcraid_cmd
*cmd
)
5570 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5571 struct pmcraid_resource_entry
*res
, *temp
;
5572 struct pmcraid_config_table_entry
*cfgte
;
5573 unsigned long lock_flags
;
5578 if (pinstance
->cfg_table
->flags
& MICROCODE_UPDATE_REQUIRED
)
5579 pmcraid_err("IOA requires microcode download\n");
5581 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
5583 /* resource list is protected by pinstance->resource_lock.
5584 * init_res_table can be called from probe (user-thread) or runtime
5585 * reset (timer/tasklet)
5587 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
5589 list_for_each_entry_safe(res
, temp
, &pinstance
->used_res_q
, queue
)
5590 list_move_tail(&res
->queue
, &old_res
);
5592 for (i
= 0; i
< le16_to_cpu(pinstance
->cfg_table
->num_entries
); i
++) {
5593 if (be16_to_cpu(pinstance
->inq_data
->fw_version
) <=
5594 PMCRAID_FW_VERSION_1
)
5595 cfgte
= &pinstance
->cfg_table
->entries
[i
];
5597 cfgte
= (struct pmcraid_config_table_entry
*)
5598 &pinstance
->cfg_table
->entries_ext
[i
];
5600 if (!pmcraid_expose_resource(fw_version
, cfgte
))
5605 /* If this entry was already detected and initialized */
5606 list_for_each_entry_safe(res
, temp
, &old_res
, queue
) {
5608 rc
= memcmp(&res
->cfg_entry
.resource_address
,
5609 &cfgte
->resource_address
,
5610 sizeof(cfgte
->resource_address
));
5612 list_move_tail(&res
->queue
,
5613 &pinstance
->used_res_q
);
5619 /* If this is new entry, initialize it and add it the queue */
5622 if (list_empty(&pinstance
->free_res_q
)) {
5623 pmcraid_err("Too many devices attached\n");
5628 res
= list_entry(pinstance
->free_res_q
.next
,
5629 struct pmcraid_resource_entry
, queue
);
5631 res
->scsi_dev
= NULL
;
5632 res
->change_detected
= RES_CHANGE_ADD
;
5633 res
->reset_progress
= 0;
5634 list_move_tail(&res
->queue
, &pinstance
->used_res_q
);
5637 /* copy new configuration table entry details into driver
5638 * maintained resource entry
5641 memcpy(&res
->cfg_entry
, cfgte
,
5642 pinstance
->config_table_entry_size
);
5643 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5644 res
->cfg_entry
.resource_type
,
5645 (fw_version
<= PMCRAID_FW_VERSION_1
?
5646 res
->cfg_entry
.unique_flags1
:
5647 le16_to_cpu(res
->cfg_entry
.array_id
) & 0xFF),
5648 le32_to_cpu(res
->cfg_entry
.resource_address
));
5652 /* Detect any deleted entries, mark them for deletion from mid-layer */
5653 list_for_each_entry_safe(res
, temp
, &old_res
, queue
) {
5655 if (res
->scsi_dev
) {
5656 res
->change_detected
= RES_CHANGE_DEL
;
5657 res
->cfg_entry
.resource_handle
=
5658 PMCRAID_INVALID_RES_HANDLE
;
5659 list_move_tail(&res
->queue
, &pinstance
->used_res_q
);
5661 list_move_tail(&res
->queue
, &pinstance
->free_res_q
);
5665 /* release the resource list lock */
5666 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
5667 pmcraid_set_timestamp(cmd
);
5671 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5672 * @cmd: pointer pmcraid_cmd struct
5674 * This function sends a Query IOA Configuration command to the adapter to
5675 * retrieve the IOA configuration table.
5680 static void pmcraid_querycfg(struct pmcraid_cmd
*cmd
)
5682 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5683 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
5684 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5685 __be32 cfg_table_size
= cpu_to_be32(sizeof(struct pmcraid_config_table
));
5687 if (be16_to_cpu(pinstance
->inq_data
->fw_version
) <=
5688 PMCRAID_FW_VERSION_1
)
5689 pinstance
->config_table_entry_size
=
5690 sizeof(struct pmcraid_config_table_entry
);
5692 pinstance
->config_table_entry_size
=
5693 sizeof(struct pmcraid_config_table_entry_ext
);
5695 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
5696 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5698 ioarcb
->cdb
[0] = PMCRAID_QUERY_IOA_CONFIG
;
5700 /* firmware requires 4-byte length field, specified in B.E format */
5701 memcpy(&(ioarcb
->cdb
[10]), &cfg_table_size
, sizeof(cfg_table_size
));
5703 /* Since entire config table can be described by single IOADL, it can
5704 * be part of IOARCB itself
5706 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
5707 offsetof(struct pmcraid_ioarcb
,
5708 add_data
.u
.ioadl
[0]));
5709 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
5710 ioarcb
->ioarcb_bus_addr
&= cpu_to_le64(~0x1FULL
);
5712 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
5713 ioarcb
->data_transfer_length
=
5714 cpu_to_le32(sizeof(struct pmcraid_config_table
));
5716 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
5717 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
5718 ioadl
->address
= cpu_to_le64(pinstance
->cfg_table_bus_addr
);
5719 ioadl
->data_len
= cpu_to_le32(sizeof(struct pmcraid_config_table
));
5721 pmcraid_send_cmd(cmd
, pmcraid_init_res_table
,
5722 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5727 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5728 * @pdev: pointer to pci device structure
5729 * @dev_id: pointer to device ids structure
5732 * returns 0 if the device is claimed and successfully configured.
5733 * returns non-zero error code in case of any failure
5735 static int pmcraid_probe(struct pci_dev
*pdev
,
5736 const struct pci_device_id
*dev_id
)
5738 struct pmcraid_instance
*pinstance
;
5739 struct Scsi_Host
*host
;
5740 void __iomem
*mapped_pci_addr
;
5741 int rc
= PCIBIOS_SUCCESSFUL
;
5743 if (atomic_read(&pmcraid_adapter_count
) >= PMCRAID_MAX_ADAPTERS
) {
5745 ("maximum number(%d) of supported adapters reached\n",
5746 atomic_read(&pmcraid_adapter_count
));
5750 atomic_inc(&pmcraid_adapter_count
);
5751 rc
= pci_enable_device(pdev
);
5754 dev_err(&pdev
->dev
, "Cannot enable adapter\n");
5755 atomic_dec(&pmcraid_adapter_count
);
5759 dev_info(&pdev
->dev
,
5760 "Found new IOA(%x:%x), Total IOA count: %d\n",
5761 pdev
->vendor
, pdev
->device
,
5762 atomic_read(&pmcraid_adapter_count
));
5764 rc
= pci_request_regions(pdev
, PMCRAID_DRIVER_NAME
);
5768 "Couldn't register memory range of registers\n");
5769 goto out_disable_device
;
5772 mapped_pci_addr
= pci_iomap(pdev
, 0, 0);
5774 if (!mapped_pci_addr
) {
5775 dev_err(&pdev
->dev
, "Couldn't map PCI registers memory\n");
5777 goto out_release_regions
;
5780 pci_set_master(pdev
);
5782 /* Firmware requires the system bus address of IOARCB to be within
5783 * 32-bit addressable range though it has 64-bit IOARRIN register.
5784 * However, firmware supports 64-bit streaming DMA buffers, whereas
5785 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5786 * returns memory within 4GB (if not, change this logic), coherent
5787 * buffers are within firmware acceptable address ranges.
5789 if ((sizeof(dma_addr_t
) == 4) ||
5790 pci_set_dma_mask(pdev
, DMA_BIT_MASK(64)))
5791 rc
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
5793 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5794 * bit mask for pci_alloc_consistent to return addresses within 4GB
5797 rc
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
5800 dev_err(&pdev
->dev
, "Failed to set PCI DMA mask\n");
5804 host
= scsi_host_alloc(&pmcraid_host_template
,
5805 sizeof(struct pmcraid_instance
));
5808 dev_err(&pdev
->dev
, "scsi_host_alloc failed!\n");
5813 host
->max_id
= PMCRAID_MAX_NUM_TARGETS_PER_BUS
;
5814 host
->max_lun
= PMCRAID_MAX_NUM_LUNS_PER_TARGET
;
5815 host
->unique_id
= host
->host_no
;
5816 host
->max_channel
= PMCRAID_MAX_BUS_TO_SCAN
;
5817 host
->max_cmd_len
= PMCRAID_MAX_CDB_LEN
;
5819 /* zero out entire instance structure */
5820 pinstance
= (struct pmcraid_instance
*)host
->hostdata
;
5821 memset(pinstance
, 0, sizeof(*pinstance
));
5823 pinstance
->chip_cfg
=
5824 (struct pmcraid_chip_details
*)(dev_id
->driver_data
);
5826 rc
= pmcraid_init_instance(pdev
, host
, mapped_pci_addr
);
5829 dev_err(&pdev
->dev
, "failed to initialize adapter instance\n");
5830 goto out_scsi_host_put
;
5833 pci_set_drvdata(pdev
, pinstance
);
5835 /* Save PCI config-space for use following the reset */
5836 rc
= pci_save_state(pinstance
->pdev
);
5839 dev_err(&pdev
->dev
, "Failed to save PCI config space\n");
5840 goto out_scsi_host_put
;
5843 pmcraid_disable_interrupts(pinstance
, ~0);
5845 rc
= pmcraid_register_interrupt_handler(pinstance
);
5848 dev_err(&pdev
->dev
, "couldn't register interrupt handler\n");
5849 goto out_scsi_host_put
;
5852 pmcraid_init_tasklets(pinstance
);
5854 /* allocate verious buffers used by LLD.*/
5855 rc
= pmcraid_init_buffers(pinstance
);
5858 pmcraid_err("couldn't allocate memory blocks\n");
5859 goto out_unregister_isr
;
5862 /* check the reset type required */
5863 pmcraid_reset_type(pinstance
);
5865 pmcraid_enable_interrupts(pinstance
, PMCRAID_PCI_INTERRUPTS
);
5867 /* Start IOA firmware initialization and bring card to Operational
5870 pmcraid_info("starting IOA initialization sequence\n");
5871 if (pmcraid_reset_bringup(pinstance
)) {
5872 dev_err(&pdev
->dev
, "couldn't initialize IOA\n");
5874 goto out_release_bufs
;
5877 /* Add adapter instance into mid-layer list */
5878 rc
= scsi_add_host(pinstance
->host
, &pdev
->dev
);
5880 pmcraid_err("couldn't add host into mid-layer: %d\n", rc
);
5881 goto out_release_bufs
;
5884 scsi_scan_host(pinstance
->host
);
5886 rc
= pmcraid_setup_chrdev(pinstance
);
5889 pmcraid_err("couldn't create mgmt interface, error: %x\n",
5891 goto out_remove_host
;
5894 /* Schedule worker thread to handle CCN and take care of adding and
5895 * removing devices to OS
5897 atomic_set(&pinstance
->expose_resources
, 1);
5898 schedule_work(&pinstance
->worker_q
);
5902 scsi_remove_host(host
);
5905 pmcraid_release_buffers(pinstance
);
5908 pmcraid_kill_tasklets(pinstance
);
5909 pmcraid_unregister_interrupt_handler(pinstance
);
5912 scsi_host_put(host
);
5915 iounmap(mapped_pci_addr
);
5917 out_release_regions
:
5918 pci_release_regions(pdev
);
5921 atomic_dec(&pmcraid_adapter_count
);
5922 pci_disable_device(pdev
);
5927 * PCI driver structure of pcmraid driver
5929 static struct pci_driver pmcraid_driver
= {
5930 .name
= PMCRAID_DRIVER_NAME
,
5931 .id_table
= pmcraid_pci_table
,
5932 .probe
= pmcraid_probe
,
5933 .remove
= pmcraid_remove
,
5934 .suspend
= pmcraid_suspend
,
5935 .resume
= pmcraid_resume
,
5936 .shutdown
= pmcraid_shutdown
5940 * pmcraid_init - module load entry point
5942 static int __init
pmcraid_init(void)
5947 pmcraid_info("%s Device Driver version: %s\n",
5948 PMCRAID_DRIVER_NAME
, PMCRAID_DRIVER_VERSION
);
5950 error
= alloc_chrdev_region(&dev
, 0,
5951 PMCRAID_MAX_ADAPTERS
,
5955 pmcraid_err("failed to get a major number for adapters\n");
5959 pmcraid_major
= MAJOR(dev
);
5960 pmcraid_class
= class_create(THIS_MODULE
, PMCRAID_DEVFILE
);
5962 if (IS_ERR(pmcraid_class
)) {
5963 error
= PTR_ERR(pmcraid_class
);
5964 pmcraid_err("failed to register with sysfs, error = %x\n",
5966 goto out_unreg_chrdev
;
5969 error
= pmcraid_netlink_init();
5972 class_destroy(pmcraid_class
);
5973 goto out_unreg_chrdev
;
5976 error
= pci_register_driver(&pmcraid_driver
);
5981 pmcraid_err("failed to register pmcraid driver, error = %x\n",
5983 class_destroy(pmcraid_class
);
5984 pmcraid_netlink_release();
5987 unregister_chrdev_region(MKDEV(pmcraid_major
, 0), PMCRAID_MAX_ADAPTERS
);
5994 * pmcraid_exit - module unload entry point
5996 static void __exit
pmcraid_exit(void)
5998 pmcraid_netlink_release();
5999 unregister_chrdev_region(MKDEV(pmcraid_major
, 0),
6000 PMCRAID_MAX_ADAPTERS
);
6001 pci_unregister_driver(&pmcraid_driver
);
6002 class_destroy(pmcraid_class
);
6005 module_init(pmcraid_init
);
6006 module_exit(pmcraid_exit
);