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 <scsi/scsi.h>
49 #include <scsi/scsi_host.h>
50 #include <scsi/scsi_device.h>
51 #include <scsi/scsi_tcq.h>
52 #include <scsi/scsi_eh.h>
53 #include <scsi/scsi_cmnd.h>
54 #include <scsi/scsicam.h>
59 * Module configuration parameters
61 static unsigned int pmcraid_debug_log
;
62 static unsigned int pmcraid_disable_aen
;
63 static unsigned int pmcraid_log_level
= IOASC_LOG_LEVEL_MUST
;
64 static unsigned int pmcraid_enable_msix
;
67 * Data structures to support multiple adapters by the LLD.
68 * pmcraid_adapter_count - count of configured adapters
70 static atomic_t pmcraid_adapter_count
= ATOMIC_INIT(0);
73 * Supporting user-level control interface through IOCTL commands.
74 * pmcraid_major - major number to use
75 * pmcraid_minor - minor number(s) to use
77 static unsigned int pmcraid_major
;
78 static struct class *pmcraid_class
;
79 DECLARE_BITMAP(pmcraid_minor
, PMCRAID_MAX_ADAPTERS
);
84 MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
85 MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(PMCRAID_DRIVER_VERSION
);
89 module_param_named(log_level
, pmcraid_log_level
, uint
, (S_IRUGO
| S_IWUSR
));
90 MODULE_PARM_DESC(log_level
,
91 "Enables firmware error code logging, default :1 high-severity"
92 " errors, 2: all errors including high-severity errors,"
93 " 0: disables logging");
95 module_param_named(debug
, pmcraid_debug_log
, uint
, (S_IRUGO
| S_IWUSR
));
96 MODULE_PARM_DESC(debug
,
97 "Enable driver verbose message logging. Set 1 to enable."
100 module_param_named(disable_aen
, pmcraid_disable_aen
, uint
, (S_IRUGO
| S_IWUSR
));
101 MODULE_PARM_DESC(disable_aen
,
102 "Disable driver aen notifications to apps. Set 1 to disable."
105 /* chip specific constants for PMC MaxRAID controllers (same for
108 static struct pmcraid_chip_details pmcraid_chip_cfg
[] = {
113 .global_intr_mask
= 0x00034,
114 .ioa_host_intr
= 0x0009C,
115 .ioa_host_intr_clr
= 0x000A0,
116 .ioa_host_msix_intr
= 0x7FC40,
117 .ioa_host_mask
= 0x7FC28,
118 .ioa_host_mask_clr
= 0x7FC28,
119 .host_ioa_intr
= 0x00020,
120 .host_ioa_intr_clr
= 0x00020,
121 .transop_timeout
= 300
126 * PCI device ids supported by pmcraid driver
128 static struct pci_device_id pmcraid_pci_table
[] = {
129 { PCI_DEVICE(PCI_VENDOR_ID_PMC
, PCI_DEVICE_ID_PMC_MAXRAID
),
130 0, 0, (kernel_ulong_t
)&pmcraid_chip_cfg
[0]
135 MODULE_DEVICE_TABLE(pci
, pmcraid_pci_table
);
140 * pmcraid_slave_alloc - Prepare for commands to a device
141 * @scsi_dev: scsi device struct
143 * This function is called by mid-layer prior to sending any command to the new
144 * device. Stores resource entry details of the device in scsi_device struct.
145 * Queuecommand uses the resource handle and other details to fill up IOARCB
146 * while sending commands to the device.
149 * 0 on success / -ENXIO if device does not exist
151 static int pmcraid_slave_alloc(struct scsi_device
*scsi_dev
)
153 struct pmcraid_resource_entry
*temp
, *res
= NULL
;
154 struct pmcraid_instance
*pinstance
;
156 unsigned long lock_flags
;
160 pinstance
= shost_priv(scsi_dev
->host
);
162 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
164 /* Driver exposes VSET and GSCSI resources only; all other device types
165 * are not exposed. Resource list is synchronized using resource lock
166 * so any traversal or modifications to the list should be done inside
169 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
170 list_for_each_entry(temp
, &pinstance
->used_res_q
, queue
) {
172 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
173 if (RES_IS_VSET(temp
->cfg_entry
)) {
174 if (fw_version
<= PMCRAID_FW_VERSION_1
)
175 target
= temp
->cfg_entry
.unique_flags1
;
177 target
= temp
->cfg_entry
.array_id
& 0xFF;
179 if (target
> PMCRAID_MAX_VSET_TARGETS
)
181 bus
= PMCRAID_VSET_BUS_ID
;
183 } else if (RES_IS_GSCSI(temp
->cfg_entry
)) {
184 target
= RES_TARGET(temp
->cfg_entry
.resource_address
);
185 bus
= PMCRAID_PHYS_BUS_ID
;
186 lun
= RES_LUN(temp
->cfg_entry
.resource_address
);
191 if (bus
== scsi_dev
->channel
&&
192 target
== scsi_dev
->id
&&
193 lun
== scsi_dev
->lun
) {
200 res
->scsi_dev
= scsi_dev
;
201 scsi_dev
->hostdata
= res
;
202 res
->change_detected
= 0;
203 atomic_set(&res
->read_failures
, 0);
204 atomic_set(&res
->write_failures
, 0);
207 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
212 * pmcraid_slave_configure - Configures a SCSI device
213 * @scsi_dev: scsi device struct
215 * This function is executed by SCSI mid layer just after a device is first
216 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
217 * timeout value (default 30s) will be over-written to a higher value (60s)
218 * and max_sectors value will be over-written to 512. It also sets queue depth
219 * to host->cmd_per_lun value
224 static int pmcraid_slave_configure(struct scsi_device
*scsi_dev
)
226 struct pmcraid_resource_entry
*res
= scsi_dev
->hostdata
;
231 /* LLD exposes VSETs and Enclosure devices only */
232 if (RES_IS_GSCSI(res
->cfg_entry
) &&
233 scsi_dev
->type
!= TYPE_ENCLOSURE
)
236 pmcraid_info("configuring %x:%x:%x:%x\n",
237 scsi_dev
->host
->unique_id
,
242 if (RES_IS_GSCSI(res
->cfg_entry
)) {
243 scsi_dev
->allow_restart
= 1;
244 } else if (RES_IS_VSET(res
->cfg_entry
)) {
245 scsi_dev
->allow_restart
= 1;
246 blk_queue_rq_timeout(scsi_dev
->request_queue
,
247 PMCRAID_VSET_IO_TIMEOUT
);
248 blk_queue_max_hw_sectors(scsi_dev
->request_queue
,
249 PMCRAID_VSET_MAX_SECTORS
);
252 if (scsi_dev
->tagged_supported
&&
253 (RES_IS_GSCSI(res
->cfg_entry
) || RES_IS_VSET(res
->cfg_entry
))) {
254 scsi_activate_tcq(scsi_dev
, scsi_dev
->queue_depth
);
255 scsi_adjust_queue_depth(scsi_dev
, MSG_SIMPLE_TAG
,
256 scsi_dev
->host
->cmd_per_lun
);
258 scsi_adjust_queue_depth(scsi_dev
, 0,
259 scsi_dev
->host
->cmd_per_lun
);
266 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
268 * @scsi_dev: scsi device struct
270 * This is called by mid-layer before removing a device. Pointer assignments
271 * done in pmcraid_slave_alloc will be reset to NULL here.
276 static void pmcraid_slave_destroy(struct scsi_device
*scsi_dev
)
278 struct pmcraid_resource_entry
*res
;
280 res
= (struct pmcraid_resource_entry
*)scsi_dev
->hostdata
;
283 res
->scsi_dev
= NULL
;
285 scsi_dev
->hostdata
= NULL
;
289 * pmcraid_change_queue_depth - Change the device's queue depth
290 * @scsi_dev: scsi device struct
291 * @depth: depth to set
292 * @reason: calling context
297 static int pmcraid_change_queue_depth(struct scsi_device
*scsi_dev
, int depth
,
300 if (reason
!= SCSI_QDEPTH_DEFAULT
)
303 if (depth
> PMCRAID_MAX_CMD_PER_LUN
)
304 depth
= PMCRAID_MAX_CMD_PER_LUN
;
306 scsi_adjust_queue_depth(scsi_dev
, scsi_get_tag_type(scsi_dev
), depth
);
308 return scsi_dev
->queue_depth
;
312 * pmcraid_change_queue_type - Change the device's queue type
313 * @scsi_dev: scsi device struct
314 * @tag: type of tags to use
317 * actual queue type set
319 static int pmcraid_change_queue_type(struct scsi_device
*scsi_dev
, int tag
)
321 struct pmcraid_resource_entry
*res
;
323 res
= (struct pmcraid_resource_entry
*)scsi_dev
->hostdata
;
325 if ((res
) && scsi_dev
->tagged_supported
&&
326 (RES_IS_GSCSI(res
->cfg_entry
) || RES_IS_VSET(res
->cfg_entry
))) {
327 scsi_set_tag_type(scsi_dev
, tag
);
330 scsi_activate_tcq(scsi_dev
, scsi_dev
->queue_depth
);
332 scsi_deactivate_tcq(scsi_dev
, scsi_dev
->queue_depth
);
341 * pmcraid_init_cmdblk - initializes a command block
343 * @cmd: pointer to struct pmcraid_cmd to be initialized
344 * @index: if >=0 first time initialization; otherwise reinitialization
349 void pmcraid_init_cmdblk(struct pmcraid_cmd
*cmd
, int index
)
351 struct pmcraid_ioarcb
*ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
352 dma_addr_t dma_addr
= cmd
->ioa_cb_bus_addr
;
355 /* first time initialization (called from probe) */
357 offsetof(struct pmcraid_control_block
, ioasa
);
360 ioarcb
->response_handle
= cpu_to_le32(index
<< 2);
361 ioarcb
->ioarcb_bus_addr
= cpu_to_le64(dma_addr
);
362 ioarcb
->ioasa_bus_addr
= cpu_to_le64(dma_addr
+ ioasa_offset
);
363 ioarcb
->ioasa_len
= cpu_to_le16(sizeof(struct pmcraid_ioasa
));
365 /* re-initialization of various lengths, called once command is
368 memset(&cmd
->ioa_cb
->ioarcb
.cdb
, 0, PMCRAID_MAX_CDB_LEN
);
370 ioarcb
->request_flags0
= 0;
371 ioarcb
->request_flags1
= 0;
372 ioarcb
->cmd_timeout
= 0;
373 ioarcb
->ioarcb_bus_addr
&= (~0x1FULL
);
374 ioarcb
->ioadl_bus_addr
= 0;
375 ioarcb
->ioadl_length
= 0;
376 ioarcb
->data_transfer_length
= 0;
377 ioarcb
->add_cmd_param_length
= 0;
378 ioarcb
->add_cmd_param_offset
= 0;
379 cmd
->ioa_cb
->ioasa
.ioasc
= 0;
380 cmd
->ioa_cb
->ioasa
.residual_data_length
= 0;
384 cmd
->cmd_done
= NULL
;
385 cmd
->scsi_cmd
= NULL
;
387 cmd
->completion_req
= 0;
388 cmd
->sense_buffer
= 0;
389 cmd
->sense_buffer_dma
= 0;
391 init_timer(&cmd
->timer
);
395 * pmcraid_reinit_cmdblk - reinitialize a command block
397 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
402 static void pmcraid_reinit_cmdblk(struct pmcraid_cmd
*cmd
)
404 pmcraid_init_cmdblk(cmd
, -1);
408 * pmcraid_get_free_cmd - get a free cmd block from command block pool
409 * @pinstance: adapter instance structure
412 * returns pointer to cmd block or NULL if no blocks are available
414 static struct pmcraid_cmd
*pmcraid_get_free_cmd(
415 struct pmcraid_instance
*pinstance
418 struct pmcraid_cmd
*cmd
= NULL
;
419 unsigned long lock_flags
;
421 /* free cmd block list is protected by free_pool_lock */
422 spin_lock_irqsave(&pinstance
->free_pool_lock
, lock_flags
);
424 if (!list_empty(&pinstance
->free_cmd_pool
)) {
425 cmd
= list_entry(pinstance
->free_cmd_pool
.next
,
426 struct pmcraid_cmd
, free_list
);
427 list_del(&cmd
->free_list
);
429 spin_unlock_irqrestore(&pinstance
->free_pool_lock
, lock_flags
);
431 /* Initialize the command block before giving it the caller */
433 pmcraid_reinit_cmdblk(cmd
);
438 * pmcraid_return_cmd - return a completed command block back into free pool
439 * @cmd: pointer to the command block
444 void pmcraid_return_cmd(struct pmcraid_cmd
*cmd
)
446 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
447 unsigned long lock_flags
;
449 spin_lock_irqsave(&pinstance
->free_pool_lock
, lock_flags
);
450 list_add_tail(&cmd
->free_list
, &pinstance
->free_cmd_pool
);
451 spin_unlock_irqrestore(&pinstance
->free_pool_lock
, lock_flags
);
455 * pmcraid_read_interrupts - reads IOA interrupts
457 * @pinstance: pointer to adapter instance structure
460 * interrupts read from IOA
462 static u32
pmcraid_read_interrupts(struct pmcraid_instance
*pinstance
)
464 return (pinstance
->interrupt_mode
) ?
465 ioread32(pinstance
->int_regs
.ioa_host_msix_interrupt_reg
) :
466 ioread32(pinstance
->int_regs
.ioa_host_interrupt_reg
);
470 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
472 * @pinstance: pointer to per adapter instance structure
473 * @intrs: interrupts to disable
478 static void pmcraid_disable_interrupts(
479 struct pmcraid_instance
*pinstance
,
483 u32 gmask
= ioread32(pinstance
->int_regs
.global_interrupt_mask_reg
);
484 u32 nmask
= gmask
| GLOBAL_INTERRUPT_MASK
;
486 iowrite32(intrs
, pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
487 iowrite32(nmask
, pinstance
->int_regs
.global_interrupt_mask_reg
);
488 ioread32(pinstance
->int_regs
.global_interrupt_mask_reg
);
490 if (!pinstance
->interrupt_mode
) {
492 pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
493 ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
498 * pmcraid_enable_interrupts - Enables specified interrupts
500 * @pinstance: pointer to per adapter instance structure
501 * @intr: interrupts to enable
506 static void pmcraid_enable_interrupts(
507 struct pmcraid_instance
*pinstance
,
511 u32 gmask
= ioread32(pinstance
->int_regs
.global_interrupt_mask_reg
);
512 u32 nmask
= gmask
& (~GLOBAL_INTERRUPT_MASK
);
514 iowrite32(nmask
, pinstance
->int_regs
.global_interrupt_mask_reg
);
516 if (!pinstance
->interrupt_mode
) {
518 pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
519 ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
522 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
523 ioread32(pinstance
->int_regs
.global_interrupt_mask_reg
),
524 ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
));
528 * pmcraid_clr_trans_op - clear trans to op interrupt
530 * @pinstance: pointer to per adapter instance structure
535 static void pmcraid_clr_trans_op(
536 struct pmcraid_instance
*pinstance
539 unsigned long lock_flags
;
541 if (!pinstance
->interrupt_mode
) {
542 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL
,
543 pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
544 ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
545 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL
,
546 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
547 ioread32(pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
550 if (pinstance
->reset_cmd
!= NULL
) {
551 del_timer(&pinstance
->reset_cmd
->timer
);
553 pinstance
->host
->host_lock
, lock_flags
);
554 pinstance
->reset_cmd
->cmd_done(pinstance
->reset_cmd
);
555 spin_unlock_irqrestore(
556 pinstance
->host
->host_lock
, lock_flags
);
561 * pmcraid_reset_type - Determine the required reset type
562 * @pinstance: pointer to adapter instance structure
564 * IOA requires hard reset if any of the following conditions is true.
565 * 1. If HRRQ valid interrupt is not masked
566 * 2. IOA reset alert doorbell is set
567 * 3. If there are any error interrupts
569 static void pmcraid_reset_type(struct pmcraid_instance
*pinstance
)
575 mask
= ioread32(pinstance
->int_regs
.ioa_host_interrupt_mask_reg
);
576 intrs
= ioread32(pinstance
->int_regs
.ioa_host_interrupt_reg
);
577 alerts
= ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
579 if ((mask
& INTRS_HRRQ_VALID
) == 0 ||
580 (alerts
& DOORBELL_IOA_RESET_ALERT
) ||
581 (intrs
& PMCRAID_ERROR_INTERRUPTS
)) {
582 pmcraid_info("IOA requires hard reset\n");
583 pinstance
->ioa_hard_reset
= 1;
586 /* If unit check is active, trigger the dump */
587 if (intrs
& INTRS_IOA_UNIT_CHECK
)
588 pinstance
->ioa_unit_check
= 1;
592 * pmcraid_bist_done - completion function for PCI BIST
593 * @cmd: pointer to reset command
598 static void pmcraid_ioa_reset(struct pmcraid_cmd
*);
600 static void pmcraid_bist_done(struct pmcraid_cmd
*cmd
)
602 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
603 unsigned long lock_flags
;
607 rc
= pci_read_config_word(pinstance
->pdev
, PCI_COMMAND
, &pci_reg
);
609 /* If PCI config space can't be accessed wait for another two secs */
610 if ((rc
!= PCIBIOS_SUCCESSFUL
|| (!(pci_reg
& PCI_COMMAND_MEMORY
))) &&
611 cmd
->time_left
> 0) {
612 pmcraid_info("BIST not complete, waiting another 2 secs\n");
613 cmd
->timer
.expires
= jiffies
+ cmd
->time_left
;
615 cmd
->timer
.data
= (unsigned long)cmd
;
616 cmd
->timer
.function
=
617 (void (*)(unsigned long))pmcraid_bist_done
;
618 add_timer(&cmd
->timer
);
621 pmcraid_info("BIST is complete, proceeding with reset\n");
622 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
623 pmcraid_ioa_reset(cmd
);
624 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
629 * pmcraid_start_bist - starts BIST
630 * @cmd: pointer to reset cmd
634 static void pmcraid_start_bist(struct pmcraid_cmd
*cmd
)
636 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
637 u32 doorbells
, intrs
;
639 /* proceed with bist and wait for 2 seconds */
640 iowrite32(DOORBELL_IOA_START_BIST
,
641 pinstance
->int_regs
.host_ioa_interrupt_reg
);
642 doorbells
= ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
643 intrs
= ioread32(pinstance
->int_regs
.ioa_host_interrupt_reg
);
644 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
647 cmd
->time_left
= msecs_to_jiffies(PMCRAID_BIST_TIMEOUT
);
648 cmd
->timer
.data
= (unsigned long)cmd
;
649 cmd
->timer
.expires
= jiffies
+ msecs_to_jiffies(PMCRAID_BIST_TIMEOUT
);
650 cmd
->timer
.function
= (void (*)(unsigned long))pmcraid_bist_done
;
651 add_timer(&cmd
->timer
);
655 * pmcraid_reset_alert_done - completion routine for reset_alert
656 * @cmd: pointer to command block used in reset sequence
660 static void pmcraid_reset_alert_done(struct pmcraid_cmd
*cmd
)
662 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
663 u32 status
= ioread32(pinstance
->ioa_status
);
664 unsigned long lock_flags
;
666 /* if the critical operation in progress bit is set or the wait times
667 * out, invoke reset engine to proceed with hard reset. If there is
668 * some more time to wait, restart the timer
670 if (((status
& INTRS_CRITICAL_OP_IN_PROGRESS
) == 0) ||
671 cmd
->time_left
<= 0) {
672 pmcraid_info("critical op is reset proceeding with reset\n");
673 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
674 pmcraid_ioa_reset(cmd
);
675 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
677 pmcraid_info("critical op is not yet reset waiting again\n");
678 /* restart timer if some more time is available to wait */
679 cmd
->time_left
-= PMCRAID_CHECK_FOR_RESET_TIMEOUT
;
680 cmd
->timer
.data
= (unsigned long)cmd
;
681 cmd
->timer
.expires
= jiffies
+ PMCRAID_CHECK_FOR_RESET_TIMEOUT
;
682 cmd
->timer
.function
=
683 (void (*)(unsigned long))pmcraid_reset_alert_done
;
684 add_timer(&cmd
->timer
);
689 * pmcraid_reset_alert - alerts IOA for a possible reset
690 * @cmd : command block to be used for reset sequence.
693 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
694 * successfully written to IOA. Returns non-zero in case pci_config_space
697 static void pmcraid_notify_ioastate(struct pmcraid_instance
*, u32
);
698 static void pmcraid_reset_alert(struct pmcraid_cmd
*cmd
)
700 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
705 /* If we are able to access IOA PCI config space, alert IOA that we are
706 * going to reset it soon. This enables IOA to preserv persistent error
707 * data if any. In case memory space is not accessible, proceed with
710 rc
= pci_read_config_word(pinstance
->pdev
, PCI_COMMAND
, &pci_reg
);
711 if ((rc
== PCIBIOS_SUCCESSFUL
) && (pci_reg
& PCI_COMMAND_MEMORY
)) {
713 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
714 * reset IOA doesn't generate any interrupts when CRITICAL
715 * OPERATION bit is reset. A timer is started to wait for this
718 cmd
->time_left
= PMCRAID_RESET_TIMEOUT
;
719 cmd
->timer
.data
= (unsigned long)cmd
;
720 cmd
->timer
.expires
= jiffies
+ PMCRAID_CHECK_FOR_RESET_TIMEOUT
;
721 cmd
->timer
.function
=
722 (void (*)(unsigned long))pmcraid_reset_alert_done
;
723 add_timer(&cmd
->timer
);
725 iowrite32(DOORBELL_IOA_RESET_ALERT
,
726 pinstance
->int_regs
.host_ioa_interrupt_reg
);
728 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
729 pmcraid_info("doorbells after reset alert: %x\n", doorbells
);
731 pmcraid_info("PCI config is not accessible starting BIST\n");
732 pinstance
->ioa_state
= IOA_STATE_IN_HARD_RESET
;
733 pmcraid_start_bist(cmd
);
738 * pmcraid_timeout_handler - Timeout handler for internally generated ops
740 * @cmd : pointer to command structure, that got timedout
742 * This function blocks host requests and initiates an adapter reset.
747 static void pmcraid_timeout_handler(struct pmcraid_cmd
*cmd
)
749 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
750 unsigned long lock_flags
;
752 dev_info(&pinstance
->pdev
->dev
,
753 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
754 cmd
->ioa_cb
->ioarcb
.cdb
[0]);
756 /* Command timeouts result in hard reset sequence. The command that got
757 * timed out may be the one used as part of reset sequence. In this
758 * case restart reset sequence using the same command block even if
759 * reset is in progress. Otherwise fail this command and get a free
760 * command block to restart the reset sequence.
762 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
763 if (!pinstance
->ioa_reset_in_progress
) {
764 pinstance
->ioa_reset_attempts
= 0;
765 cmd
= pmcraid_get_free_cmd(pinstance
);
767 /* If we are out of command blocks, just return here itself.
768 * Some other command's timeout handler can do the reset job
771 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
773 pmcraid_err("no free cmnd block for timeout handler\n");
777 pinstance
->reset_cmd
= cmd
;
778 pinstance
->ioa_reset_in_progress
= 1;
780 pmcraid_info("reset is already in progress\n");
782 if (pinstance
->reset_cmd
!= cmd
) {
783 /* This command should have been given to IOA, this
784 * command will be completed by fail_outstanding_cmds
787 pmcraid_err("cmd is pending but reset in progress\n");
790 /* If this command was being used as part of the reset
791 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
792 * causes fail_outstanding_commands not to return the command
793 * block back to free pool
795 if (cmd
== pinstance
->reset_cmd
)
796 cmd
->cmd_done
= pmcraid_ioa_reset
;
799 /* Notify apps of important IOA bringup/bringdown sequences */
800 if (pinstance
->scn
.ioa_state
!= PMC_DEVICE_EVENT_RESET_START
&&
801 pinstance
->scn
.ioa_state
!= PMC_DEVICE_EVENT_SHUTDOWN_START
)
802 pmcraid_notify_ioastate(pinstance
,
803 PMC_DEVICE_EVENT_RESET_START
);
805 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
806 scsi_block_requests(pinstance
->host
);
807 pmcraid_reset_alert(cmd
);
808 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
812 * pmcraid_internal_done - completion routine for internally generated cmds
814 * @cmd: command that got response from IOA
819 static void pmcraid_internal_done(struct pmcraid_cmd
*cmd
)
821 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
822 cmd
->ioa_cb
->ioarcb
.cdb
[0],
823 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
825 /* Some of the internal commands are sent with callers blocking for the
826 * response. Same will be indicated as part of cmd->completion_req
827 * field. Response path needs to wake up any waiters waiting for cmd
828 * completion if this flag is set.
830 if (cmd
->completion_req
) {
831 cmd
->completion_req
= 0;
832 complete(&cmd
->wait_for_completion
);
835 /* most of the internal commands are completed by caller itself, so
836 * no need to return the command block back to free pool until we are
837 * required to do so (e.g once done with initialization).
841 pmcraid_return_cmd(cmd
);
846 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
848 * @cmd: command that got response from IOA
850 * This routine is called after driver re-reads configuration table due to a
851 * lost CCN. It returns the command block back to free pool and schedules
852 * worker thread to add/delete devices into the system.
857 static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd
*cmd
)
859 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
860 cmd
->ioa_cb
->ioarcb
.cdb
[0],
861 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
865 pmcraid_return_cmd(cmd
);
867 pmcraid_info("scheduling worker for config table reinitialization\n");
868 schedule_work(&cmd
->drv_inst
->worker_q
);
872 * pmcraid_erp_done - Process completion of SCSI error response from device
873 * @cmd: pmcraid_command
875 * This function copies the sense buffer into the scsi_cmd struct and completes
876 * scsi_cmd by calling scsi_done function.
881 static void pmcraid_erp_done(struct pmcraid_cmd
*cmd
)
883 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
884 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
885 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
887 if (PMCRAID_IOASC_SENSE_KEY(ioasc
) > 0) {
888 scsi_cmd
->result
|= (DID_ERROR
<< 16);
889 scmd_printk(KERN_INFO
, scsi_cmd
,
890 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
891 cmd
->ioa_cb
->ioarcb
.cdb
[0], ioasc
);
894 /* if we had allocated sense buffers for request sense, copy the sense
895 * release the buffers
897 if (cmd
->sense_buffer
!= NULL
) {
898 memcpy(scsi_cmd
->sense_buffer
,
900 SCSI_SENSE_BUFFERSIZE
);
901 pci_free_consistent(pinstance
->pdev
,
902 SCSI_SENSE_BUFFERSIZE
,
903 cmd
->sense_buffer
, cmd
->sense_buffer_dma
);
904 cmd
->sense_buffer
= NULL
;
905 cmd
->sense_buffer_dma
= 0;
908 scsi_dma_unmap(scsi_cmd
);
909 pmcraid_return_cmd(cmd
);
910 scsi_cmd
->scsi_done(scsi_cmd
);
914 * pmcraid_fire_command - sends an IOA command to adapter
916 * This function adds the given block into pending command list
917 * and returns without waiting
919 * @cmd : command to be sent to the device
924 static void _pmcraid_fire_command(struct pmcraid_cmd
*cmd
)
926 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
927 unsigned long lock_flags
;
929 /* Add this command block to pending cmd pool. We do this prior to
930 * writting IOARCB to ioarrin because IOA might complete the command
931 * by the time we are about to add it to the list. Response handler
932 * (isr/tasklet) looks for cmd block in the pending pending list.
934 spin_lock_irqsave(&pinstance
->pending_pool_lock
, lock_flags
);
935 list_add_tail(&cmd
->free_list
, &pinstance
->pending_cmd_pool
);
936 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
, lock_flags
);
937 atomic_inc(&pinstance
->outstanding_cmds
);
939 /* driver writes lower 32-bit value of IOARCB address only */
941 iowrite32(le32_to_cpu(cmd
->ioa_cb
->ioarcb
.ioarcb_bus_addr
),
946 * pmcraid_send_cmd - fires a command to IOA
948 * This function also sets up timeout function, and command completion
951 * @cmd: pointer to the command block to be fired to IOA
952 * @cmd_done: command completion function, called once IOA responds
953 * @timeout: timeout to wait for this command completion
954 * @timeout_func: timeout handler
959 static void pmcraid_send_cmd(
960 struct pmcraid_cmd
*cmd
,
961 void (*cmd_done
) (struct pmcraid_cmd
*),
962 unsigned long timeout
,
963 void (*timeout_func
) (struct pmcraid_cmd
*)
966 /* initialize done function */
967 cmd
->cmd_done
= cmd_done
;
970 /* setup timeout handler */
971 cmd
->timer
.data
= (unsigned long)cmd
;
972 cmd
->timer
.expires
= jiffies
+ timeout
;
973 cmd
->timer
.function
= (void (*)(unsigned long))timeout_func
;
974 add_timer(&cmd
->timer
);
977 /* fire the command to IOA */
978 _pmcraid_fire_command(cmd
);
982 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
983 * @cmd: pointer to the command block used for sending IOA shutdown command
988 static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd
*cmd
)
990 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
991 unsigned long lock_flags
;
993 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
994 pmcraid_ioa_reset(cmd
);
995 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
999 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
1001 * @cmd: pointer to the command block used as part of reset sequence
1006 static void pmcraid_ioa_shutdown(struct pmcraid_cmd
*cmd
)
1008 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
1009 cmd
->ioa_cb
->ioarcb
.cdb
[0],
1010 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
1012 /* Note that commands sent during reset require next command to be sent
1013 * to IOA. Hence reinit the done function as well as timeout function
1015 pmcraid_reinit_cmdblk(cmd
);
1016 cmd
->ioa_cb
->ioarcb
.request_type
= REQ_TYPE_IOACMD
;
1017 cmd
->ioa_cb
->ioarcb
.resource_handle
=
1018 cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1019 cmd
->ioa_cb
->ioarcb
.cdb
[0] = PMCRAID_IOA_SHUTDOWN
;
1020 cmd
->ioa_cb
->ioarcb
.cdb
[1] = PMCRAID_SHUTDOWN_NORMAL
;
1022 /* fire shutdown command to hardware. */
1023 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
1024 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
));
1026 pmcraid_notify_ioastate(cmd
->drv_inst
, PMC_DEVICE_EVENT_SHUTDOWN_START
);
1028 pmcraid_send_cmd(cmd
, pmcraid_ioa_shutdown_done
,
1029 PMCRAID_SHUTDOWN_TIMEOUT
,
1030 pmcraid_timeout_handler
);
1034 * pmcraid_get_fwversion_done - completion function for get_fwversion
1036 * @cmd: pointer to command block used to send INQUIRY command
1041 static void pmcraid_querycfg(struct pmcraid_cmd
*);
1043 static void pmcraid_get_fwversion_done(struct pmcraid_cmd
*cmd
)
1045 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1046 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
1047 unsigned long lock_flags
;
1049 /* configuration table entry size depends on firmware version. If fw
1050 * version is not known, it is not possible to interpret IOA config
1054 pmcraid_err("IOA Inquiry failed with %x\n", ioasc
);
1055 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
1056 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
1057 pmcraid_reset_alert(cmd
);
1058 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
1060 pmcraid_querycfg(cmd
);
1065 * pmcraid_get_fwversion - reads firmware version information
1067 * @cmd: pointer to command block used to send INQUIRY command
1072 static void pmcraid_get_fwversion(struct pmcraid_cmd
*cmd
)
1074 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1075 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
1076 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1077 u16 data_size
= sizeof(struct pmcraid_inquiry_data
);
1079 pmcraid_reinit_cmdblk(cmd
);
1080 ioarcb
->request_type
= REQ_TYPE_SCSI
;
1081 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1082 ioarcb
->cdb
[0] = INQUIRY
;
1084 ioarcb
->cdb
[2] = 0xD0;
1085 ioarcb
->cdb
[3] = (data_size
>> 8) & 0xFF;
1086 ioarcb
->cdb
[4] = data_size
& 0xFF;
1088 /* Since entire inquiry data it can be part of IOARCB itself
1090 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
1091 offsetof(struct pmcraid_ioarcb
,
1092 add_data
.u
.ioadl
[0]));
1093 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
1094 ioarcb
->ioarcb_bus_addr
&= ~(0x1FULL
);
1096 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
1097 ioarcb
->data_transfer_length
= cpu_to_le32(data_size
);
1098 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
1099 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
1100 ioadl
->address
= cpu_to_le64(pinstance
->inq_data_baddr
);
1101 ioadl
->data_len
= cpu_to_le32(data_size
);
1103 pmcraid_send_cmd(cmd
, pmcraid_get_fwversion_done
,
1104 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
1108 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1109 * @cmd: pointer to command block to be used for identify hrrq
1114 static void pmcraid_identify_hrrq(struct pmcraid_cmd
*cmd
)
1116 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1117 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1118 int index
= cmd
->hrrq_index
;
1119 __be64 hrrq_addr
= cpu_to_be64(pinstance
->hrrq_start_bus_addr
[index
]);
1120 u32 hrrq_size
= cpu_to_be32(sizeof(u32
) * PMCRAID_MAX_CMD
);
1121 void (*done_function
)(struct pmcraid_cmd
*);
1123 pmcraid_reinit_cmdblk(cmd
);
1124 cmd
->hrrq_index
= index
+ 1;
1126 if (cmd
->hrrq_index
< pinstance
->num_hrrq
) {
1127 done_function
= pmcraid_identify_hrrq
;
1129 cmd
->hrrq_index
= 0;
1130 done_function
= pmcraid_get_fwversion
;
1133 /* Initialize ioarcb */
1134 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
1135 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1137 /* initialize the hrrq number where IOA will respond to this command */
1138 ioarcb
->hrrq_id
= index
;
1139 ioarcb
->cdb
[0] = PMCRAID_IDENTIFY_HRRQ
;
1140 ioarcb
->cdb
[1] = index
;
1142 /* IOA expects 64-bit pci address to be written in B.E format
1143 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1145 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1146 hrrq_addr
, ioarcb
->ioarcb_bus_addr
, index
);
1148 memcpy(&(ioarcb
->cdb
[2]), &hrrq_addr
, sizeof(hrrq_addr
));
1149 memcpy(&(ioarcb
->cdb
[10]), &hrrq_size
, sizeof(hrrq_size
));
1151 /* Subsequent commands require HRRQ identification to be successful.
1152 * Note that this gets called even during reset from SCSI mid-layer
1155 pmcraid_send_cmd(cmd
, done_function
,
1156 PMCRAID_INTERNAL_TIMEOUT
,
1157 pmcraid_timeout_handler
);
1160 static void pmcraid_process_ccn(struct pmcraid_cmd
*cmd
);
1161 static void pmcraid_process_ldn(struct pmcraid_cmd
*cmd
);
1164 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1166 * @cmd: initialized command block pointer
1171 static void pmcraid_send_hcam_cmd(struct pmcraid_cmd
*cmd
)
1173 if (cmd
->ioa_cb
->ioarcb
.cdb
[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE
)
1174 atomic_set(&(cmd
->drv_inst
->ccn
.ignore
), 0);
1176 atomic_set(&(cmd
->drv_inst
->ldn
.ignore
), 0);
1178 pmcraid_send_cmd(cmd
, cmd
->cmd_done
, 0, NULL
);
1182 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1184 * @pinstance: pointer to adapter instance structure
1188 * pointer to initialized pmcraid_cmd structure or NULL
1190 static struct pmcraid_cmd
*pmcraid_init_hcam
1192 struct pmcraid_instance
*pinstance
,
1196 struct pmcraid_cmd
*cmd
;
1197 struct pmcraid_ioarcb
*ioarcb
;
1198 struct pmcraid_ioadl_desc
*ioadl
;
1199 struct pmcraid_hostrcb
*hcam
;
1200 void (*cmd_done
) (struct pmcraid_cmd
*);
1204 cmd
= pmcraid_get_free_cmd(pinstance
);
1207 pmcraid_err("no free command blocks for hcam\n");
1211 if (type
== PMCRAID_HCAM_CODE_CONFIG_CHANGE
) {
1212 rcb_size
= sizeof(struct pmcraid_hcam_ccn_ext
);
1213 cmd_done
= pmcraid_process_ccn
;
1214 dma
= pinstance
->ccn
.baddr
+ PMCRAID_AEN_HDR_SIZE
;
1215 hcam
= &pinstance
->ccn
;
1217 rcb_size
= sizeof(struct pmcraid_hcam_ldn
);
1218 cmd_done
= pmcraid_process_ldn
;
1219 dma
= pinstance
->ldn
.baddr
+ PMCRAID_AEN_HDR_SIZE
;
1220 hcam
= &pinstance
->ldn
;
1223 /* initialize command pointer used for HCAM registration */
1226 ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1227 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
1228 offsetof(struct pmcraid_ioarcb
,
1229 add_data
.u
.ioadl
[0]));
1230 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
1231 ioadl
= ioarcb
->add_data
.u
.ioadl
;
1233 /* Initialize ioarcb */
1234 ioarcb
->request_type
= REQ_TYPE_HCAM
;
1235 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
1236 ioarcb
->cdb
[0] = PMCRAID_HOST_CONTROLLED_ASYNC
;
1237 ioarcb
->cdb
[1] = type
;
1238 ioarcb
->cdb
[7] = (rcb_size
>> 8) & 0xFF;
1239 ioarcb
->cdb
[8] = (rcb_size
) & 0xFF;
1241 ioarcb
->data_transfer_length
= cpu_to_le32(rcb_size
);
1243 ioadl
[0].flags
|= IOADL_FLAGS_READ_LAST
;
1244 ioadl
[0].data_len
= cpu_to_le32(rcb_size
);
1245 ioadl
[0].address
= cpu_to_le32(dma
);
1247 cmd
->cmd_done
= cmd_done
;
1252 * pmcraid_send_hcam - Send an HCAM to IOA
1253 * @pinstance: ioa config struct
1256 * This function will send a Host Controlled Async command to IOA.
1261 static void pmcraid_send_hcam(struct pmcraid_instance
*pinstance
, u8 type
)
1263 struct pmcraid_cmd
*cmd
= pmcraid_init_hcam(pinstance
, type
);
1264 pmcraid_send_hcam_cmd(cmd
);
1269 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1271 * @cmd: pointer to cmd that is used as cancelling command
1272 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1274 static void pmcraid_prepare_cancel_cmd(
1275 struct pmcraid_cmd
*cmd
,
1276 struct pmcraid_cmd
*cmd_to_cancel
1279 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
1280 __be64 ioarcb_addr
= cmd_to_cancel
->ioa_cb
->ioarcb
.ioarcb_bus_addr
;
1282 /* Get the resource handle to where the command to be aborted has been
1285 ioarcb
->resource_handle
= cmd_to_cancel
->ioa_cb
->ioarcb
.resource_handle
;
1286 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
1287 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
1288 ioarcb
->cdb
[0] = PMCRAID_ABORT_CMD
;
1290 /* IOARCB address of the command to be cancelled is given in
1291 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1292 * IOARCB address are not masked.
1294 ioarcb_addr
= cpu_to_be64(ioarcb_addr
);
1295 memcpy(&(ioarcb
->cdb
[2]), &ioarcb_addr
, sizeof(ioarcb_addr
));
1299 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1301 * @cmd: command to be used as cancelling command
1303 * @cmd_done: op done function for the cancelling command
1305 static void pmcraid_cancel_hcam(
1306 struct pmcraid_cmd
*cmd
,
1308 void (*cmd_done
) (struct pmcraid_cmd
*)
1311 struct pmcraid_instance
*pinstance
;
1312 struct pmcraid_hostrcb
*hcam
;
1314 pinstance
= cmd
->drv_inst
;
1315 hcam
= (type
== PMCRAID_HCAM_CODE_LOG_DATA
) ?
1316 &pinstance
->ldn
: &pinstance
->ccn
;
1318 /* prepare for cancelling previous hcam command. If the HCAM is
1319 * currently not pending with IOA, we would have hcam->cmd as non-null
1321 if (hcam
->cmd
== NULL
)
1324 pmcraid_prepare_cancel_cmd(cmd
, hcam
->cmd
);
1326 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1327 * schedule queuecommand while we are doing this
1329 pmcraid_send_cmd(cmd
, cmd_done
,
1330 PMCRAID_INTERNAL_TIMEOUT
,
1331 pmcraid_timeout_handler
);
1335 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1337 * @cmd: command block to be used for cancelling the HCAM
1339 static void pmcraid_cancel_ccn(struct pmcraid_cmd
*cmd
)
1341 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1342 cmd
->ioa_cb
->ioarcb
.cdb
[0],
1343 le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
));
1345 pmcraid_reinit_cmdblk(cmd
);
1347 pmcraid_cancel_hcam(cmd
,
1348 PMCRAID_HCAM_CODE_CONFIG_CHANGE
,
1349 pmcraid_ioa_shutdown
);
1353 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1355 * @cmd: command block to be used for cancelling the HCAM
1357 static void pmcraid_cancel_ldn(struct pmcraid_cmd
*cmd
)
1359 pmcraid_cancel_hcam(cmd
,
1360 PMCRAID_HCAM_CODE_LOG_DATA
,
1361 pmcraid_cancel_ccn
);
1365 * pmcraid_expose_resource - check if the resource can be exposed to OS
1367 * @fw_version: firmware version code
1368 * @cfgte: pointer to configuration table entry of the resource
1371 * true if resource can be added to midlayer, false(0) otherwise
1373 static int pmcraid_expose_resource(u16 fw_version
,
1374 struct pmcraid_config_table_entry
*cfgte
)
1378 if (cfgte
->resource_type
== RES_TYPE_VSET
) {
1379 if (fw_version
<= PMCRAID_FW_VERSION_1
)
1380 retval
= ((cfgte
->unique_flags1
& 0x80) == 0);
1382 retval
= ((cfgte
->unique_flags0
& 0x80) == 0 &&
1383 (cfgte
->unique_flags1
& 0x80) == 0);
1385 } else if (cfgte
->resource_type
== RES_TYPE_GSCSI
)
1386 retval
= (RES_BUS(cfgte
->resource_address
) !=
1387 PMCRAID_VIRTUAL_ENCL_BUS_ID
);
1391 /* attributes supported by pmcraid_event_family */
1393 PMCRAID_AEN_ATTR_UNSPEC
,
1394 PMCRAID_AEN_ATTR_EVENT
,
1395 __PMCRAID_AEN_ATTR_MAX
,
1397 #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1399 /* commands supported by pmcraid_event_family */
1401 PMCRAID_AEN_CMD_UNSPEC
,
1402 PMCRAID_AEN_CMD_EVENT
,
1403 __PMCRAID_AEN_CMD_MAX
,
1405 #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1407 static struct genl_family pmcraid_event_family
= {
1408 .id
= GENL_ID_GENERATE
,
1411 .maxattr
= PMCRAID_AEN_ATTR_MAX
1415 * pmcraid_netlink_init - registers pmcraid_event_family
1418 * 0 if the pmcraid_event_family is successfully registered
1419 * with netlink generic, non-zero otherwise
1421 static int pmcraid_netlink_init(void)
1425 result
= genl_register_family(&pmcraid_event_family
);
1430 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1431 pmcraid_event_family
.id
);
1437 * pmcraid_netlink_release - unregisters pmcraid_event_family
1442 static void pmcraid_netlink_release(void)
1444 genl_unregister_family(&pmcraid_event_family
);
1448 * pmcraid_notify_aen - sends event msg to user space application
1449 * @pinstance: pointer to adapter instance structure
1453 * 0 if success, error value in case of any failure.
1455 static int pmcraid_notify_aen(
1456 struct pmcraid_instance
*pinstance
,
1457 struct pmcraid_aen_msg
*aen_msg
,
1461 struct sk_buff
*skb
;
1463 u32 total_size
, nla_genl_hdr_total_size
;
1466 aen_msg
->hostno
= (pinstance
->host
->unique_id
<< 16 |
1467 MINOR(pinstance
->cdev
.dev
));
1468 aen_msg
->length
= data_size
;
1470 data_size
+= sizeof(*aen_msg
);
1472 total_size
= nla_total_size(data_size
);
1473 /* Add GENL_HDR to total_size */
1474 nla_genl_hdr_total_size
=
1475 (total_size
+ (GENL_HDRLEN
+
1476 ((struct genl_family
*)&pmcraid_event_family
)->hdrsize
)
1478 skb
= genlmsg_new(nla_genl_hdr_total_size
, GFP_ATOMIC
);
1482 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1487 /* add the genetlink message header */
1488 msg_header
= genlmsg_put(skb
, 0, 0,
1489 &pmcraid_event_family
, 0,
1490 PMCRAID_AEN_CMD_EVENT
);
1492 pmcraid_err("failed to copy command details\n");
1497 result
= nla_put(skb
, PMCRAID_AEN_ATTR_EVENT
, data_size
, aen_msg
);
1500 pmcraid_err("failed to copy AEN attribute data\n");
1505 /* send genetlink multicast message to notify appplications */
1506 result
= genlmsg_end(skb
, msg_header
);
1509 pmcraid_err("genlmsg_end failed\n");
1515 genlmsg_multicast(&pmcraid_event_family
, skb
, 0,
1516 pmcraid_event_family
.id
, GFP_ATOMIC
);
1518 /* If there are no listeners, genlmsg_multicast may return non-zero
1522 pmcraid_info("error (%x) sending aen event message\n", result
);
1527 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1528 * @pinstance: pointer adapter instance structure
1531 * 0 if success, error value in case of any failure
1533 static int pmcraid_notify_ccn(struct pmcraid_instance
*pinstance
)
1535 return pmcraid_notify_aen(pinstance
,
1537 pinstance
->ccn
.hcam
->data_len
+
1538 sizeof(struct pmcraid_hcam_hdr
));
1542 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1543 * @pinstance: pointer adapter instance structure
1546 * 0 if success, error value in case of any failure
1548 static int pmcraid_notify_ldn(struct pmcraid_instance
*pinstance
)
1550 return pmcraid_notify_aen(pinstance
,
1552 pinstance
->ldn
.hcam
->data_len
+
1553 sizeof(struct pmcraid_hcam_hdr
));
1557 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1558 * @pinstance: pointer adapter instance structure
1559 * @evt: controller state event to be sent
1562 * 0 if success, error value in case of any failure
1564 static void pmcraid_notify_ioastate(struct pmcraid_instance
*pinstance
, u32 evt
)
1566 pinstance
->scn
.ioa_state
= evt
;
1567 pmcraid_notify_aen(pinstance
,
1568 &pinstance
->scn
.msg
,
1573 * pmcraid_handle_config_change - Handle a config change from the adapter
1574 * @pinstance: pointer to per adapter instance structure
1580 static void pmcraid_handle_config_change(struct pmcraid_instance
*pinstance
)
1582 struct pmcraid_config_table_entry
*cfg_entry
;
1583 struct pmcraid_hcam_ccn
*ccn_hcam
;
1584 struct pmcraid_cmd
*cmd
;
1585 struct pmcraid_cmd
*cfgcmd
;
1586 struct pmcraid_resource_entry
*res
= NULL
;
1587 unsigned long lock_flags
;
1588 unsigned long host_lock_flags
;
1590 u32 hidden_entry
= 0;
1594 ccn_hcam
= (struct pmcraid_hcam_ccn
*)pinstance
->ccn
.hcam
;
1595 cfg_entry
= &ccn_hcam
->cfg_entry
;
1596 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
1598 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1599 res: %x:%x:%x:%x\n",
1600 pinstance
->ccn
.hcam
->ilid
,
1601 pinstance
->ccn
.hcam
->op_code
,
1602 ((pinstance
->ccn
.hcam
->timestamp1
) |
1603 ((pinstance
->ccn
.hcam
->timestamp2
& 0xffffffffLL
) << 32)),
1604 pinstance
->ccn
.hcam
->notification_type
,
1605 pinstance
->ccn
.hcam
->notification_lost
,
1606 pinstance
->ccn
.hcam
->flags
,
1607 pinstance
->host
->unique_id
,
1608 RES_IS_VSET(*cfg_entry
) ? PMCRAID_VSET_BUS_ID
:
1609 (RES_IS_GSCSI(*cfg_entry
) ? PMCRAID_PHYS_BUS_ID
:
1610 RES_BUS(cfg_entry
->resource_address
)),
1611 RES_IS_VSET(*cfg_entry
) ?
1612 (fw_version
<= PMCRAID_FW_VERSION_1
?
1613 cfg_entry
->unique_flags1
:
1614 cfg_entry
->array_id
& 0xFF) :
1615 RES_TARGET(cfg_entry
->resource_address
),
1616 RES_LUN(cfg_entry
->resource_address
));
1619 /* If this HCAM indicates a lost notification, read the config table */
1620 if (pinstance
->ccn
.hcam
->notification_lost
) {
1621 cfgcmd
= pmcraid_get_free_cmd(pinstance
);
1623 pmcraid_info("lost CCN, reading config table\b");
1624 pinstance
->reinit_cfg_table
= 1;
1625 pmcraid_querycfg(cfgcmd
);
1627 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1629 goto out_notify_apps
;
1632 /* If this resource is not going to be added to mid-layer, just notify
1633 * applications and return. If this notification is about hiding a VSET
1634 * resource, check if it was exposed already.
1636 if (pinstance
->ccn
.hcam
->notification_type
==
1637 NOTIFICATION_TYPE_ENTRY_CHANGED
&&
1638 cfg_entry
->resource_type
== RES_TYPE_VSET
) {
1640 if (fw_version
<= PMCRAID_FW_VERSION_1
)
1641 hidden_entry
= (cfg_entry
->unique_flags1
& 0x80) != 0;
1643 hidden_entry
= (cfg_entry
->unique_flags1
& 0x80) != 0;
1645 } else if (!pmcraid_expose_resource(fw_version
, cfg_entry
)) {
1646 goto out_notify_apps
;
1649 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
1650 list_for_each_entry(res
, &pinstance
->used_res_q
, queue
) {
1651 rc
= memcmp(&res
->cfg_entry
.resource_address
,
1652 &cfg_entry
->resource_address
,
1653 sizeof(cfg_entry
->resource_address
));
1663 spin_unlock_irqrestore(&pinstance
->resource_lock
,
1665 goto out_notify_apps
;
1668 /* If there are more number of resources than what driver can
1669 * manage, do not notify the applications about the CCN. Just
1670 * ignore this notifications and re-register the same HCAM
1672 if (list_empty(&pinstance
->free_res_q
)) {
1673 spin_unlock_irqrestore(&pinstance
->resource_lock
,
1675 pmcraid_err("too many resources attached\n");
1676 spin_lock_irqsave(pinstance
->host
->host_lock
,
1678 pmcraid_send_hcam(pinstance
,
1679 PMCRAID_HCAM_CODE_CONFIG_CHANGE
);
1680 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
1685 res
= list_entry(pinstance
->free_res_q
.next
,
1686 struct pmcraid_resource_entry
, queue
);
1688 list_del(&res
->queue
);
1689 res
->scsi_dev
= NULL
;
1690 res
->reset_progress
= 0;
1691 list_add_tail(&res
->queue
, &pinstance
->used_res_q
);
1694 memcpy(&res
->cfg_entry
, cfg_entry
, pinstance
->config_table_entry_size
);
1696 if (pinstance
->ccn
.hcam
->notification_type
==
1697 NOTIFICATION_TYPE_ENTRY_DELETED
|| hidden_entry
) {
1698 if (res
->scsi_dev
) {
1699 if (fw_version
<= PMCRAID_FW_VERSION_1
)
1700 res
->cfg_entry
.unique_flags1
&= 0x7F;
1702 res
->cfg_entry
.array_id
&= 0xFF;
1703 res
->change_detected
= RES_CHANGE_DEL
;
1704 res
->cfg_entry
.resource_handle
=
1705 PMCRAID_INVALID_RES_HANDLE
;
1706 schedule_work(&pinstance
->worker_q
);
1708 /* This may be one of the non-exposed resources */
1709 list_move_tail(&res
->queue
, &pinstance
->free_res_q
);
1711 } else if (!res
->scsi_dev
) {
1712 res
->change_detected
= RES_CHANGE_ADD
;
1713 schedule_work(&pinstance
->worker_q
);
1715 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
1719 /* Notify configuration changes to registered applications.*/
1720 if (!pmcraid_disable_aen
)
1721 pmcraid_notify_ccn(pinstance
);
1723 cmd
= pmcraid_init_hcam(pinstance
, PMCRAID_HCAM_CODE_CONFIG_CHANGE
);
1725 pmcraid_send_hcam_cmd(cmd
);
1729 * pmcraid_get_error_info - return error string for an ioasc
1730 * @ioasc: ioasc code
1734 static struct pmcraid_ioasc_error
*pmcraid_get_error_info(u32 ioasc
)
1737 for (i
= 0; i
< ARRAY_SIZE(pmcraid_ioasc_error_table
); i
++) {
1738 if (pmcraid_ioasc_error_table
[i
].ioasc_code
== ioasc
)
1739 return &pmcraid_ioasc_error_table
[i
];
1745 * pmcraid_ioasc_logger - log IOASC information based user-settings
1746 * @ioasc: ioasc code
1747 * @cmd: pointer to command that resulted in 'ioasc'
1749 void pmcraid_ioasc_logger(u32 ioasc
, struct pmcraid_cmd
*cmd
)
1751 struct pmcraid_ioasc_error
*error_info
= pmcraid_get_error_info(ioasc
);
1753 if (error_info
== NULL
||
1754 cmd
->drv_inst
->current_log_level
< error_info
->log_level
)
1757 /* log the error string */
1758 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1759 cmd
->ioa_cb
->ioarcb
.cdb
[0],
1760 cmd
->ioa_cb
->ioarcb
.resource_handle
,
1761 le32_to_cpu(ioasc
), error_info
->error_string
);
1765 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1767 * @pinstance: pointer to per adapter instance structure
1772 static void pmcraid_handle_error_log(struct pmcraid_instance
*pinstance
)
1774 struct pmcraid_hcam_ldn
*hcam_ldn
;
1777 hcam_ldn
= (struct pmcraid_hcam_ldn
*)pinstance
->ldn
.hcam
;
1780 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1781 pinstance
->ldn
.hcam
->ilid
,
1782 pinstance
->ldn
.hcam
->op_code
,
1783 pinstance
->ldn
.hcam
->notification_type
,
1784 pinstance
->ldn
.hcam
->notification_lost
,
1785 pinstance
->ldn
.hcam
->flags
,
1786 pinstance
->ldn
.hcam
->overlay_id
);
1788 /* log only the errors, no need to log informational log entries */
1789 if (pinstance
->ldn
.hcam
->notification_type
!=
1790 NOTIFICATION_TYPE_ERROR_LOG
)
1793 if (pinstance
->ldn
.hcam
->notification_lost
==
1794 HOSTRCB_NOTIFICATIONS_LOST
)
1795 dev_info(&pinstance
->pdev
->dev
, "Error notifications lost\n");
1797 ioasc
= le32_to_cpu(hcam_ldn
->error_log
.fd_ioasc
);
1799 if (ioasc
== PMCRAID_IOASC_UA_BUS_WAS_RESET
||
1800 ioasc
== PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER
) {
1801 dev_info(&pinstance
->pdev
->dev
,
1802 "UnitAttention due to IOA Bus Reset\n");
1803 scsi_report_bus_reset(
1805 RES_BUS(hcam_ldn
->error_log
.fd_ra
));
1812 * pmcraid_process_ccn - Op done function for a CCN.
1813 * @cmd: pointer to command struct
1815 * This function is the op done function for a configuration
1816 * change notification
1821 static void pmcraid_process_ccn(struct pmcraid_cmd
*cmd
)
1823 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1824 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
1825 unsigned long lock_flags
;
1827 pinstance
->ccn
.cmd
= NULL
;
1828 pmcraid_return_cmd(cmd
);
1830 /* If driver initiated IOA reset happened while this hcam was pending
1831 * with IOA, or IOA bringdown sequence is in progress, no need to
1832 * re-register the hcam
1834 if (ioasc
== PMCRAID_IOASC_IOA_WAS_RESET
||
1835 atomic_read(&pinstance
->ccn
.ignore
) == 1) {
1838 dev_info(&pinstance
->pdev
->dev
,
1839 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc
);
1840 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
1841 pmcraid_send_hcam(pinstance
, PMCRAID_HCAM_CODE_CONFIG_CHANGE
);
1842 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
1844 pmcraid_handle_config_change(pinstance
);
1849 * pmcraid_process_ldn - op done function for an LDN
1850 * @cmd: pointer to command block
1855 static void pmcraid_initiate_reset(struct pmcraid_instance
*);
1856 static void pmcraid_set_timestamp(struct pmcraid_cmd
*cmd
);
1858 static void pmcraid_process_ldn(struct pmcraid_cmd
*cmd
)
1860 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1861 struct pmcraid_hcam_ldn
*ldn_hcam
=
1862 (struct pmcraid_hcam_ldn
*)pinstance
->ldn
.hcam
;
1863 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
1864 u32 fd_ioasc
= le32_to_cpu(ldn_hcam
->error_log
.fd_ioasc
);
1865 unsigned long lock_flags
;
1867 /* return the command block back to freepool */
1868 pinstance
->ldn
.cmd
= NULL
;
1869 pmcraid_return_cmd(cmd
);
1871 /* If driver initiated IOA reset happened while this hcam was pending
1872 * with IOA, no need to re-register the hcam as reset engine will do it
1873 * once reset sequence is complete
1875 if (ioasc
== PMCRAID_IOASC_IOA_WAS_RESET
||
1876 atomic_read(&pinstance
->ccn
.ignore
) == 1) {
1878 } else if (!ioasc
) {
1879 pmcraid_handle_error_log(pinstance
);
1880 if (fd_ioasc
== PMCRAID_IOASC_NR_IOA_RESET_REQUIRED
) {
1881 spin_lock_irqsave(pinstance
->host
->host_lock
,
1883 pmcraid_initiate_reset(pinstance
);
1884 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
1888 if (fd_ioasc
== PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC
) {
1889 pinstance
->timestamp_error
= 1;
1890 pmcraid_set_timestamp(cmd
);
1893 dev_info(&pinstance
->pdev
->dev
,
1894 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc
);
1896 /* send netlink message for HCAM notification if enabled */
1897 if (!pmcraid_disable_aen
)
1898 pmcraid_notify_ldn(pinstance
);
1900 cmd
= pmcraid_init_hcam(pinstance
, PMCRAID_HCAM_CODE_LOG_DATA
);
1902 pmcraid_send_hcam_cmd(cmd
);
1906 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1908 * @pinstance: pointer per adapter instance structure
1913 static void pmcraid_register_hcams(struct pmcraid_instance
*pinstance
)
1915 pmcraid_send_hcam(pinstance
, PMCRAID_HCAM_CODE_CONFIG_CHANGE
);
1916 pmcraid_send_hcam(pinstance
, PMCRAID_HCAM_CODE_LOG_DATA
);
1920 * pmcraid_unregister_hcams - cancel HCAMs registered already
1921 * @cmd: pointer to command used as part of reset sequence
1923 static void pmcraid_unregister_hcams(struct pmcraid_cmd
*cmd
)
1925 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1927 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1928 * handling hcam response though it is not necessary. In order to
1929 * prevent this, set 'ignore', so that bring-down sequence doesn't
1930 * re-send any more hcams
1932 atomic_set(&pinstance
->ccn
.ignore
, 1);
1933 atomic_set(&pinstance
->ldn
.ignore
, 1);
1935 /* If adapter reset was forced as part of runtime reset sequence,
1936 * start the reset sequence. Reset will be triggered even in case
1939 if ((pinstance
->force_ioa_reset
&& !pinstance
->ioa_bringdown
) ||
1940 pinstance
->ioa_unit_check
) {
1941 pinstance
->force_ioa_reset
= 0;
1942 pinstance
->ioa_unit_check
= 0;
1943 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
1944 pmcraid_reset_alert(cmd
);
1948 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1949 * one after the other. So CCN cancellation will be triggered by
1950 * pmcraid_cancel_ldn itself.
1952 pmcraid_cancel_ldn(cmd
);
1956 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1957 * @pinstance: pointer to adapter instance structure
1959 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1961 static void pmcraid_reinit_buffers(struct pmcraid_instance
*);
1963 static int pmcraid_reset_enable_ioa(struct pmcraid_instance
*pinstance
)
1967 pmcraid_reinit_buffers(pinstance
);
1968 intrs
= pmcraid_read_interrupts(pinstance
);
1970 pmcraid_enable_interrupts(pinstance
, PMCRAID_PCI_INTERRUPTS
);
1972 if (intrs
& INTRS_TRANSITION_TO_OPERATIONAL
) {
1973 if (!pinstance
->interrupt_mode
) {
1974 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL
,
1975 pinstance
->int_regs
.
1976 ioa_host_interrupt_mask_reg
);
1977 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL
,
1978 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
1987 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1988 * @cmd : pointer to reset command block
1993 static void pmcraid_soft_reset(struct pmcraid_cmd
*cmd
)
1995 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
1999 /* There will be an interrupt when Transition to Operational bit is
2000 * set so tasklet would execute next reset task. The timeout handler
2001 * would re-initiate a reset
2003 cmd
->cmd_done
= pmcraid_ioa_reset
;
2004 cmd
->timer
.data
= (unsigned long)cmd
;
2005 cmd
->timer
.expires
= jiffies
+
2006 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT
);
2007 cmd
->timer
.function
= (void (*)(unsigned long))pmcraid_timeout_handler
;
2009 if (!timer_pending(&cmd
->timer
))
2010 add_timer(&cmd
->timer
);
2012 /* Enable destructive diagnostics on IOA if it is not yet in
2015 doorbell
= DOORBELL_RUNTIME_RESET
|
2016 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS
;
2018 /* Since we do RESET_ALERT and Start BIST we have to again write
2019 * MSIX Doorbell to indicate the interrupt mode
2021 if (pinstance
->interrupt_mode
) {
2022 iowrite32(DOORBELL_INTR_MODE_MSIX
,
2023 pinstance
->int_regs
.host_ioa_interrupt_reg
);
2024 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
2027 iowrite32(doorbell
, pinstance
->int_regs
.host_ioa_interrupt_reg
);
2028 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
),
2029 int_reg
= ioread32(pinstance
->int_regs
.ioa_host_interrupt_reg
);
2031 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2032 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
),
2037 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2039 * @pinstance: pointer to adapter instance structure
2044 static void pmcraid_get_dump(struct pmcraid_instance
*pinstance
)
2046 pmcraid_info("%s is not yet implemented\n", __func__
);
2050 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2051 * @pinstance: pointer to adapter instance structure
2053 * This function fails all outstanding ops. If they are submitted to IOA
2054 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2055 * otherwise just completes the commands and returns the cmd blocks to free
2061 static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance
*pinstance
)
2063 struct pmcraid_cmd
*cmd
, *temp
;
2064 unsigned long lock_flags
;
2066 /* pending command list is protected by pending_pool_lock. Its
2067 * traversal must be done as within this lock
2069 spin_lock_irqsave(&pinstance
->pending_pool_lock
, lock_flags
);
2070 list_for_each_entry_safe(cmd
, temp
, &pinstance
->pending_cmd_pool
,
2072 list_del(&cmd
->free_list
);
2073 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
,
2075 cmd
->ioa_cb
->ioasa
.ioasc
=
2076 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET
);
2077 cmd
->ioa_cb
->ioasa
.ilid
=
2078 cpu_to_be32(PMCRAID_DRIVER_ILID
);
2080 /* In case the command timer is still running */
2081 del_timer(&cmd
->timer
);
2083 /* If this is an IO command, complete it by invoking scsi_done
2084 * function. If this is one of the internal commands other
2085 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2088 if (cmd
->scsi_cmd
) {
2090 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2091 __le32 resp
= cmd
->ioa_cb
->ioarcb
.response_handle
;
2093 scsi_cmd
->result
|= DID_ERROR
<< 16;
2095 scsi_dma_unmap(scsi_cmd
);
2096 pmcraid_return_cmd(cmd
);
2098 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2099 le32_to_cpu(resp
) >> 2,
2100 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2102 scsi_cmd
->scsi_done(scsi_cmd
);
2103 } else if (cmd
->cmd_done
== pmcraid_internal_done
||
2104 cmd
->cmd_done
== pmcraid_erp_done
) {
2106 } else if (cmd
->cmd_done
!= pmcraid_ioa_reset
&&
2107 cmd
->cmd_done
!= pmcraid_ioa_shutdown_done
) {
2108 pmcraid_return_cmd(cmd
);
2111 atomic_dec(&pinstance
->outstanding_cmds
);
2112 spin_lock_irqsave(&pinstance
->pending_pool_lock
, lock_flags
);
2115 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
, lock_flags
);
2119 * pmcraid_ioa_reset - Implementation of IOA reset logic
2121 * @cmd: pointer to the cmd block to be used for entire reset process
2123 * This function executes most of the steps required for IOA reset. This gets
2124 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2125 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2126 * synchronized using host lock. Various functions called during reset process
2127 * would make use of a single command block, pointer to which is also stored in
2128 * adapter instance structure.
2133 static void pmcraid_ioa_reset(struct pmcraid_cmd
*cmd
)
2135 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
2136 u8 reset_complete
= 0;
2138 pinstance
->ioa_reset_in_progress
= 1;
2140 if (pinstance
->reset_cmd
!= cmd
) {
2141 pmcraid_err("reset is called with different command block\n");
2142 pinstance
->reset_cmd
= cmd
;
2145 pmcraid_info("reset_engine: state = %d, command = %p\n",
2146 pinstance
->ioa_state
, cmd
);
2148 switch (pinstance
->ioa_state
) {
2150 case IOA_STATE_DEAD
:
2151 /* If IOA is offline, whatever may be the reset reason, just
2152 * return. callers might be waiting on the reset wait_q, wake
2155 pmcraid_err("IOA is offline no reset is possible\n");
2159 case IOA_STATE_IN_BRINGDOWN
:
2160 /* we enter here, once ioa shutdown command is processed by IOA
2161 * Alert IOA for a possible reset. If reset alert fails, IOA
2162 * goes through hard-reset
2164 pmcraid_disable_interrupts(pinstance
, ~0);
2165 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
2166 pmcraid_reset_alert(cmd
);
2169 case IOA_STATE_UNKNOWN
:
2170 /* We may be called during probe or resume. Some pre-processing
2171 * is required for prior to reset
2173 scsi_block_requests(pinstance
->host
);
2175 /* If asked to reset while IOA was processing responses or
2176 * there are any error responses then IOA may require
2179 if (pinstance
->ioa_hard_reset
== 0) {
2180 if (ioread32(pinstance
->ioa_status
) &
2181 INTRS_TRANSITION_TO_OPERATIONAL
) {
2182 pmcraid_info("sticky bit set, bring-up\n");
2183 pinstance
->ioa_state
= IOA_STATE_IN_BRINGUP
;
2184 pmcraid_reinit_cmdblk(cmd
);
2185 pmcraid_identify_hrrq(cmd
);
2187 pinstance
->ioa_state
= IOA_STATE_IN_SOFT_RESET
;
2188 pmcraid_soft_reset(cmd
);
2191 /* Alert IOA of a possible reset and wait for critical
2192 * operation in progress bit to reset
2194 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
2195 pmcraid_reset_alert(cmd
);
2199 case IOA_STATE_IN_RESET_ALERT
:
2200 /* If critical operation in progress bit is reset or wait gets
2201 * timed out, reset proceeds with starting BIST on the IOA.
2202 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2203 * they are 3 or more, reset engine marks IOA dead and returns
2205 pinstance
->ioa_state
= IOA_STATE_IN_HARD_RESET
;
2206 pmcraid_start_bist(cmd
);
2209 case IOA_STATE_IN_HARD_RESET
:
2210 pinstance
->ioa_reset_attempts
++;
2212 /* retry reset if we haven't reached maximum allowed limit */
2213 if (pinstance
->ioa_reset_attempts
> PMCRAID_RESET_ATTEMPTS
) {
2214 pinstance
->ioa_reset_attempts
= 0;
2215 pmcraid_err("IOA didn't respond marking it as dead\n");
2216 pinstance
->ioa_state
= IOA_STATE_DEAD
;
2218 if (pinstance
->ioa_bringdown
)
2219 pmcraid_notify_ioastate(pinstance
,
2220 PMC_DEVICE_EVENT_SHUTDOWN_FAILED
);
2222 pmcraid_notify_ioastate(pinstance
,
2223 PMC_DEVICE_EVENT_RESET_FAILED
);
2228 /* Once either bist or pci reset is done, restore PCI config
2229 * space. If this fails, proceed with hard reset again
2231 pci_restore_state(pinstance
->pdev
);
2233 /* fail all pending commands */
2234 pmcraid_fail_outstanding_cmds(pinstance
);
2236 /* check if unit check is active, if so extract dump */
2237 if (pinstance
->ioa_unit_check
) {
2238 pmcraid_info("unit check is active\n");
2239 pinstance
->ioa_unit_check
= 0;
2240 pmcraid_get_dump(pinstance
);
2241 pinstance
->ioa_reset_attempts
--;
2242 pinstance
->ioa_state
= IOA_STATE_IN_RESET_ALERT
;
2243 pmcraid_reset_alert(cmd
);
2247 /* if the reset reason is to bring-down the ioa, we might be
2248 * done with the reset restore pci_config_space and complete
2251 if (pinstance
->ioa_bringdown
) {
2252 pmcraid_info("bringing down the adapter\n");
2253 pinstance
->ioa_shutdown_type
= SHUTDOWN_NONE
;
2254 pinstance
->ioa_bringdown
= 0;
2255 pinstance
->ioa_state
= IOA_STATE_UNKNOWN
;
2256 pmcraid_notify_ioastate(pinstance
,
2257 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS
);
2260 /* bring-up IOA, so proceed with soft reset
2261 * Reinitialize hrrq_buffers and their indices also
2262 * enable interrupts after a pci_restore_state
2264 if (pmcraid_reset_enable_ioa(pinstance
)) {
2265 pinstance
->ioa_state
= IOA_STATE_IN_BRINGUP
;
2266 pmcraid_info("bringing up the adapter\n");
2267 pmcraid_reinit_cmdblk(cmd
);
2268 pmcraid_identify_hrrq(cmd
);
2270 pinstance
->ioa_state
= IOA_STATE_IN_SOFT_RESET
;
2271 pmcraid_soft_reset(cmd
);
2276 case IOA_STATE_IN_SOFT_RESET
:
2277 /* TRANSITION TO OPERATIONAL is on so start initialization
2280 pmcraid_info("In softreset proceeding with bring-up\n");
2281 pinstance
->ioa_state
= IOA_STATE_IN_BRINGUP
;
2283 /* Initialization commands start with HRRQ identification. From
2284 * now on tasklet completes most of the commands as IOA is up
2285 * and intrs are enabled
2287 pmcraid_identify_hrrq(cmd
);
2290 case IOA_STATE_IN_BRINGUP
:
2291 /* we are done with bringing up of IOA, change the ioa_state to
2292 * operational and wake up any waiters
2294 pinstance
->ioa_state
= IOA_STATE_OPERATIONAL
;
2298 case IOA_STATE_OPERATIONAL
:
2300 /* When IOA is operational and a reset is requested, check for
2301 * the reset reason. If reset is to bring down IOA, unregister
2302 * HCAMs and initiate shutdown; if adapter reset is forced then
2303 * restart reset sequence again
2305 if (pinstance
->ioa_shutdown_type
== SHUTDOWN_NONE
&&
2306 pinstance
->force_ioa_reset
== 0) {
2307 pmcraid_notify_ioastate(pinstance
,
2308 PMC_DEVICE_EVENT_RESET_SUCCESS
);
2311 if (pinstance
->ioa_shutdown_type
!= SHUTDOWN_NONE
)
2312 pinstance
->ioa_state
= IOA_STATE_IN_BRINGDOWN
;
2313 pmcraid_reinit_cmdblk(cmd
);
2314 pmcraid_unregister_hcams(cmd
);
2319 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2320 * OPERATIONAL. Reset all control variables used during reset, wake up
2321 * any waiting threads and let the SCSI mid-layer send commands. Note
2322 * that host_lock must be held before invoking scsi_report_bus_reset.
2324 if (reset_complete
) {
2325 pinstance
->ioa_reset_in_progress
= 0;
2326 pinstance
->ioa_reset_attempts
= 0;
2327 pinstance
->reset_cmd
= NULL
;
2328 pinstance
->ioa_shutdown_type
= SHUTDOWN_NONE
;
2329 pinstance
->ioa_bringdown
= 0;
2330 pmcraid_return_cmd(cmd
);
2332 /* If target state is to bring up the adapter, proceed with
2333 * hcam registration and resource exposure to mid-layer.
2335 if (pinstance
->ioa_state
== IOA_STATE_OPERATIONAL
)
2336 pmcraid_register_hcams(pinstance
);
2338 wake_up_all(&pinstance
->reset_wait_q
);
2345 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2346 * ISR/tasklet during error interrupts including IOA unit check. If reset
2347 * is already in progress, it just returns, otherwise initiates IOA reset
2348 * to bring IOA up to operational state.
2350 * @pinstance: pointer to adapter instance structure
2355 static void pmcraid_initiate_reset(struct pmcraid_instance
*pinstance
)
2357 struct pmcraid_cmd
*cmd
;
2359 /* If the reset is already in progress, just return, otherwise start
2360 * reset sequence and return
2362 if (!pinstance
->ioa_reset_in_progress
) {
2363 scsi_block_requests(pinstance
->host
);
2364 cmd
= pmcraid_get_free_cmd(pinstance
);
2367 pmcraid_err("no cmnd blocks for initiate_reset\n");
2371 pinstance
->ioa_shutdown_type
= SHUTDOWN_NONE
;
2372 pinstance
->reset_cmd
= cmd
;
2373 pinstance
->force_ioa_reset
= 1;
2374 pmcraid_notify_ioastate(pinstance
,
2375 PMC_DEVICE_EVENT_RESET_START
);
2376 pmcraid_ioa_reset(cmd
);
2381 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2383 * @pinstance: pointer adapter instance structure
2384 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2385 * @target_state: expected target state after reset
2387 * Note: This command initiates reset and waits for its completion. Hence this
2388 * should not be called from isr/timer/tasklet functions (timeout handlers,
2389 * error response handlers and interrupt handlers).
2392 * 1 in case ioa_state is not target_state, 0 otherwise.
2394 static int pmcraid_reset_reload(
2395 struct pmcraid_instance
*pinstance
,
2400 struct pmcraid_cmd
*reset_cmd
= NULL
;
2401 unsigned long lock_flags
;
2404 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
2406 if (pinstance
->ioa_reset_in_progress
) {
2407 pmcraid_info("reset_reload: reset is already in progress\n");
2409 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2411 wait_event(pinstance
->reset_wait_q
,
2412 !pinstance
->ioa_reset_in_progress
);
2414 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
2416 if (pinstance
->ioa_state
== IOA_STATE_DEAD
) {
2417 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
2419 pmcraid_info("reset_reload: IOA is dead\n");
2421 } else if (pinstance
->ioa_state
== target_state
) {
2427 pmcraid_info("reset_reload: proceeding with reset\n");
2428 scsi_block_requests(pinstance
->host
);
2429 reset_cmd
= pmcraid_get_free_cmd(pinstance
);
2431 if (reset_cmd
== NULL
) {
2432 pmcraid_err("no free cmnd for reset_reload\n");
2433 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
2438 if (shutdown_type
== SHUTDOWN_NORMAL
)
2439 pinstance
->ioa_bringdown
= 1;
2441 pinstance
->ioa_shutdown_type
= shutdown_type
;
2442 pinstance
->reset_cmd
= reset_cmd
;
2443 pinstance
->force_ioa_reset
= reset
;
2444 pmcraid_info("reset_reload: initiating reset\n");
2445 pmcraid_ioa_reset(reset_cmd
);
2446 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2447 pmcraid_info("reset_reload: waiting for reset to complete\n");
2448 wait_event(pinstance
->reset_wait_q
,
2449 !pinstance
->ioa_reset_in_progress
);
2451 pmcraid_info("reset_reload: reset is complete !!\n");
2452 scsi_unblock_requests(pinstance
->host
);
2453 if (pinstance
->ioa_state
== target_state
)
2461 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2463 * @pinstance: pointer to adapter instance structure
2466 * whatever is returned from pmcraid_reset_reload
2468 static int pmcraid_reset_bringdown(struct pmcraid_instance
*pinstance
)
2470 return pmcraid_reset_reload(pinstance
,
2476 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2478 * @pinstance: pointer to adapter instance structure
2481 * whatever is returned from pmcraid_reset_reload
2483 static int pmcraid_reset_bringup(struct pmcraid_instance
*pinstance
)
2485 pmcraid_notify_ioastate(pinstance
, PMC_DEVICE_EVENT_RESET_START
);
2487 return pmcraid_reset_reload(pinstance
,
2489 IOA_STATE_OPERATIONAL
);
2493 * pmcraid_request_sense - Send request sense to a device
2494 * @cmd: pmcraid command struct
2496 * This function sends a request sense to a device as a result of a check
2497 * condition. This method re-uses the same command block that failed earlier.
2499 static void pmcraid_request_sense(struct pmcraid_cmd
*cmd
)
2501 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2502 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
2504 /* allocate DMAable memory for sense buffers */
2505 cmd
->sense_buffer
= pci_alloc_consistent(cmd
->drv_inst
->pdev
,
2506 SCSI_SENSE_BUFFERSIZE
,
2507 &cmd
->sense_buffer_dma
);
2509 if (cmd
->sense_buffer
== NULL
) {
2511 ("couldn't allocate sense buffer for request sense\n");
2512 pmcraid_erp_done(cmd
);
2516 /* re-use the command block */
2517 memset(&cmd
->ioa_cb
->ioasa
, 0, sizeof(struct pmcraid_ioasa
));
2518 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
2519 ioarcb
->request_flags0
= (SYNC_COMPLETE
|
2522 ioarcb
->request_type
= REQ_TYPE_SCSI
;
2523 ioarcb
->cdb
[0] = REQUEST_SENSE
;
2524 ioarcb
->cdb
[4] = SCSI_SENSE_BUFFERSIZE
;
2526 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
2527 offsetof(struct pmcraid_ioarcb
,
2528 add_data
.u
.ioadl
[0]));
2529 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
2531 ioarcb
->data_transfer_length
= cpu_to_le32(SCSI_SENSE_BUFFERSIZE
);
2533 ioadl
->address
= cpu_to_le64(cmd
->sense_buffer_dma
);
2534 ioadl
->data_len
= cpu_to_le32(SCSI_SENSE_BUFFERSIZE
);
2535 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
2537 /* request sense might be called as part of error response processing
2538 * which runs in tasklets context. It is possible that mid-layer might
2539 * schedule queuecommand during this time, hence, writting to IOARRIN
2540 * must be protect by host_lock
2542 pmcraid_send_cmd(cmd
, pmcraid_erp_done
,
2543 PMCRAID_REQUEST_SENSE_TIMEOUT
,
2544 pmcraid_timeout_handler
);
2548 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2549 * @cmd: command that failed
2550 * @sense: true if request_sense is required after cancel all
2552 * This function sends a cancel all to a device to clear the queue.
2554 static void pmcraid_cancel_all(struct pmcraid_cmd
*cmd
, u32 sense
)
2556 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2557 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2558 struct pmcraid_resource_entry
*res
= scsi_cmd
->device
->hostdata
;
2559 void (*cmd_done
) (struct pmcraid_cmd
*) = sense
? pmcraid_erp_done
2560 : pmcraid_request_sense
;
2562 memset(ioarcb
->cdb
, 0, PMCRAID_MAX_CDB_LEN
);
2563 ioarcb
->request_flags0
= SYNC_OVERRIDE
;
2564 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
2565 ioarcb
->cdb
[0] = PMCRAID_CANCEL_ALL_REQUESTS
;
2567 if (RES_IS_GSCSI(res
->cfg_entry
))
2568 ioarcb
->cdb
[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL
;
2570 ioarcb
->ioadl_bus_addr
= 0;
2571 ioarcb
->ioadl_length
= 0;
2572 ioarcb
->data_transfer_length
= 0;
2573 ioarcb
->ioarcb_bus_addr
&= (~0x1FULL
);
2575 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2576 * schedule queuecommand while we are doing this
2578 pmcraid_send_cmd(cmd
, cmd_done
,
2579 PMCRAID_REQUEST_SENSE_TIMEOUT
,
2580 pmcraid_timeout_handler
);
2584 * pmcraid_frame_auto_sense: frame fixed format sense information
2586 * @cmd: pointer to failing command block
2591 static void pmcraid_frame_auto_sense(struct pmcraid_cmd
*cmd
)
2593 u8
*sense_buf
= cmd
->scsi_cmd
->sense_buffer
;
2594 struct pmcraid_resource_entry
*res
= cmd
->scsi_cmd
->device
->hostdata
;
2595 struct pmcraid_ioasa
*ioasa
= &cmd
->ioa_cb
->ioasa
;
2596 u32 ioasc
= le32_to_cpu(ioasa
->ioasc
);
2597 u32 failing_lba
= 0;
2599 memset(sense_buf
, 0, SCSI_SENSE_BUFFERSIZE
);
2600 cmd
->scsi_cmd
->result
= SAM_STAT_CHECK_CONDITION
;
2602 if (RES_IS_VSET(res
->cfg_entry
) &&
2603 ioasc
== PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
&&
2604 ioasa
->u
.vset
.failing_lba_hi
!= 0) {
2606 sense_buf
[0] = 0x72;
2607 sense_buf
[1] = PMCRAID_IOASC_SENSE_KEY(ioasc
);
2608 sense_buf
[2] = PMCRAID_IOASC_SENSE_CODE(ioasc
);
2609 sense_buf
[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc
);
2613 sense_buf
[9] = 0x0A;
2614 sense_buf
[10] = 0x80;
2616 failing_lba
= le32_to_cpu(ioasa
->u
.vset
.failing_lba_hi
);
2618 sense_buf
[12] = (failing_lba
& 0xff000000) >> 24;
2619 sense_buf
[13] = (failing_lba
& 0x00ff0000) >> 16;
2620 sense_buf
[14] = (failing_lba
& 0x0000ff00) >> 8;
2621 sense_buf
[15] = failing_lba
& 0x000000ff;
2623 failing_lba
= le32_to_cpu(ioasa
->u
.vset
.failing_lba_lo
);
2625 sense_buf
[16] = (failing_lba
& 0xff000000) >> 24;
2626 sense_buf
[17] = (failing_lba
& 0x00ff0000) >> 16;
2627 sense_buf
[18] = (failing_lba
& 0x0000ff00) >> 8;
2628 sense_buf
[19] = failing_lba
& 0x000000ff;
2630 sense_buf
[0] = 0x70;
2631 sense_buf
[2] = PMCRAID_IOASC_SENSE_KEY(ioasc
);
2632 sense_buf
[12] = PMCRAID_IOASC_SENSE_CODE(ioasc
);
2633 sense_buf
[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc
);
2635 if (ioasc
== PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
) {
2636 if (RES_IS_VSET(res
->cfg_entry
))
2638 le32_to_cpu(ioasa
->u
.
2639 vset
.failing_lba_lo
);
2640 sense_buf
[0] |= 0x80;
2641 sense_buf
[3] = (failing_lba
>> 24) & 0xff;
2642 sense_buf
[4] = (failing_lba
>> 16) & 0xff;
2643 sense_buf
[5] = (failing_lba
>> 8) & 0xff;
2644 sense_buf
[6] = failing_lba
& 0xff;
2647 sense_buf
[7] = 6; /* additional length */
2652 * pmcraid_error_handler - Error response handlers for a SCSI op
2653 * @cmd: pointer to pmcraid_cmd that has failed
2655 * This function determines whether or not to initiate ERP on the affected
2656 * device. This is called from a tasklet, which doesn't hold any locks.
2659 * 0 it caller can complete the request, otherwise 1 where in error
2660 * handler itself completes the request and returns the command block
2663 static int pmcraid_error_handler(struct pmcraid_cmd
*cmd
)
2665 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2666 struct pmcraid_resource_entry
*res
= scsi_cmd
->device
->hostdata
;
2667 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
2668 struct pmcraid_ioasa
*ioasa
= &cmd
->ioa_cb
->ioasa
;
2669 u32 ioasc
= le32_to_cpu(ioasa
->ioasc
);
2670 u32 masked_ioasc
= ioasc
& PMCRAID_IOASC_SENSE_MASK
;
2671 u32 sense_copied
= 0;
2674 pmcraid_info("resource pointer is NULL\n");
2678 /* If this was a SCSI read/write command keep count of errors */
2679 if (SCSI_CMD_TYPE(scsi_cmd
->cmnd
[0]) == SCSI_READ_CMD
)
2680 atomic_inc(&res
->read_failures
);
2681 else if (SCSI_CMD_TYPE(scsi_cmd
->cmnd
[0]) == SCSI_WRITE_CMD
)
2682 atomic_inc(&res
->write_failures
);
2684 if (!RES_IS_GSCSI(res
->cfg_entry
) &&
2685 masked_ioasc
!= PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR
) {
2686 pmcraid_frame_auto_sense(cmd
);
2689 /* Log IOASC/IOASA information based on user settings */
2690 pmcraid_ioasc_logger(ioasc
, cmd
);
2692 switch (masked_ioasc
) {
2694 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST
:
2695 scsi_cmd
->result
|= (DID_ABORT
<< 16);
2698 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE
:
2699 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE
:
2700 scsi_cmd
->result
|= (DID_NO_CONNECT
<< 16);
2703 case PMCRAID_IOASC_NR_SYNC_REQUIRED
:
2705 scsi_cmd
->result
|= (DID_IMM_RETRY
<< 16);
2708 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC
:
2709 scsi_cmd
->result
|= (DID_PASSTHROUGH
<< 16);
2712 case PMCRAID_IOASC_UA_BUS_WAS_RESET
:
2713 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER
:
2714 if (!res
->reset_progress
)
2715 scsi_report_bus_reset(pinstance
->host
,
2716 scsi_cmd
->device
->channel
);
2717 scsi_cmd
->result
|= (DID_ERROR
<< 16);
2720 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR
:
2721 scsi_cmd
->result
|= PMCRAID_IOASC_SENSE_STATUS(ioasc
);
2724 /* if check_condition is not active return with error otherwise
2725 * get/frame the sense buffer
2727 if (PMCRAID_IOASC_SENSE_STATUS(ioasc
) !=
2728 SAM_STAT_CHECK_CONDITION
&&
2729 PMCRAID_IOASC_SENSE_STATUS(ioasc
) != SAM_STAT_ACA_ACTIVE
)
2732 /* If we have auto sense data as part of IOASA pass it to
2735 if (ioasa
->auto_sense_length
!= 0) {
2736 short sense_len
= ioasa
->auto_sense_length
;
2737 int data_size
= min_t(u16
, le16_to_cpu(sense_len
),
2738 SCSI_SENSE_BUFFERSIZE
);
2740 memcpy(scsi_cmd
->sense_buffer
,
2746 if (RES_IS_GSCSI(res
->cfg_entry
))
2747 pmcraid_cancel_all(cmd
, sense_copied
);
2748 else if (sense_copied
)
2749 pmcraid_erp_done(cmd
);
2751 pmcraid_request_sense(cmd
);
2755 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED
:
2759 if (PMCRAID_IOASC_SENSE_KEY(ioasc
) > RECOVERED_ERROR
)
2760 scsi_cmd
->result
|= (DID_ERROR
<< 16);
2767 * pmcraid_reset_device - device reset handler functions
2769 * @scsi_cmd: scsi command struct
2770 * @modifier: reset modifier indicating the reset sequence to be performed
2772 * This function issues a device reset to the affected device.
2773 * A LUN reset will be sent to the device first. If that does
2774 * not work, a target reset will be sent.
2779 static int pmcraid_reset_device(
2780 struct scsi_cmnd
*scsi_cmd
,
2781 unsigned long timeout
,
2785 struct pmcraid_cmd
*cmd
;
2786 struct pmcraid_instance
*pinstance
;
2787 struct pmcraid_resource_entry
*res
;
2788 struct pmcraid_ioarcb
*ioarcb
;
2789 unsigned long lock_flags
;
2793 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
2794 res
= scsi_cmd
->device
->hostdata
;
2797 sdev_printk(KERN_ERR
, scsi_cmd
->device
,
2798 "reset_device: NULL resource pointer\n");
2802 /* If adapter is currently going through reset/reload, return failed.
2803 * This will force the mid-layer to call _eh_bus/host reset, which
2804 * will then go to sleep and wait for the reset to complete
2806 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
2807 if (pinstance
->ioa_reset_in_progress
||
2808 pinstance
->ioa_state
== IOA_STATE_DEAD
) {
2809 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2813 res
->reset_progress
= 1;
2814 pmcraid_info("Resetting %s resource with addr %x\n",
2815 ((modifier
& RESET_DEVICE_LUN
) ? "LUN" :
2816 ((modifier
& RESET_DEVICE_TARGET
) ? "TARGET" : "BUS")),
2817 le32_to_cpu(res
->cfg_entry
.resource_address
));
2819 /* get a free cmd block */
2820 cmd
= pmcraid_get_free_cmd(pinstance
);
2823 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2824 pmcraid_err("%s: no cmd blocks are available\n", __func__
);
2828 ioarcb
= &cmd
->ioa_cb
->ioarcb
;
2829 ioarcb
->resource_handle
= res
->cfg_entry
.resource_handle
;
2830 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
2831 ioarcb
->cdb
[0] = PMCRAID_RESET_DEVICE
;
2833 /* Initialize reset modifier bits */
2835 modifier
= ENABLE_RESET_MODIFIER
| modifier
;
2837 ioarcb
->cdb
[1] = modifier
;
2839 init_completion(&cmd
->wait_for_completion
);
2840 cmd
->completion_req
= 1;
2842 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2843 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2844 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.resource_handle
),
2845 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2);
2847 pmcraid_send_cmd(cmd
,
2848 pmcraid_internal_done
,
2850 pmcraid_timeout_handler
);
2852 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
2854 /* RESET_DEVICE command completes after all pending IOARCBs are
2855 * completed. Once this command is completed, pmcraind_internal_done
2856 * will wake up the 'completion' queue.
2858 wait_for_completion(&cmd
->wait_for_completion
);
2860 /* complete the command here itself and return the command block
2863 pmcraid_return_cmd(cmd
);
2864 res
->reset_progress
= 0;
2865 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
2867 /* set the return value based on the returned ioasc */
2868 return PMCRAID_IOASC_SENSE_KEY(ioasc
) ? FAILED
: SUCCESS
;
2872 * _pmcraid_io_done - helper for pmcraid_io_done function
2874 * @cmd: pointer to pmcraid command struct
2875 * @reslen: residual data length to be set in the ioasa
2876 * @ioasc: ioasc either returned by IOA or set by driver itself.
2878 * This function is invoked by pmcraid_io_done to complete mid-layer
2882 * 0 if caller is required to return it to free_pool. Returns 1 if
2883 * caller need not worry about freeing command block as error handler
2884 * will take care of that.
2887 static int _pmcraid_io_done(struct pmcraid_cmd
*cmd
, int reslen
, int ioasc
)
2889 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
2892 scsi_set_resid(scsi_cmd
, reslen
);
2894 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2895 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
2896 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2897 ioasc
, scsi_cmd
->result
);
2899 if (PMCRAID_IOASC_SENSE_KEY(ioasc
) != 0)
2900 rc
= pmcraid_error_handler(cmd
);
2903 scsi_dma_unmap(scsi_cmd
);
2904 scsi_cmd
->scsi_done(scsi_cmd
);
2911 * pmcraid_io_done - SCSI completion function
2913 * @cmd: pointer to pmcraid command struct
2915 * This function is invoked by tasklet/mid-layer error handler to completing
2916 * the SCSI ops sent from mid-layer.
2922 static void pmcraid_io_done(struct pmcraid_cmd
*cmd
)
2924 u32 ioasc
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.ioasc
);
2925 u32 reslen
= le32_to_cpu(cmd
->ioa_cb
->ioasa
.residual_data_length
);
2927 if (_pmcraid_io_done(cmd
, reslen
, ioasc
) == 0)
2928 pmcraid_return_cmd(cmd
);
2932 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2934 * @cmd: command block of the command to be aborted
2937 * returns pointer to command structure used as cancelling cmd
2939 static struct pmcraid_cmd
*pmcraid_abort_cmd(struct pmcraid_cmd
*cmd
)
2941 struct pmcraid_cmd
*cancel_cmd
;
2942 struct pmcraid_instance
*pinstance
;
2943 struct pmcraid_resource_entry
*res
;
2945 pinstance
= (struct pmcraid_instance
*)cmd
->drv_inst
;
2946 res
= cmd
->scsi_cmd
->device
->hostdata
;
2948 cancel_cmd
= pmcraid_get_free_cmd(pinstance
);
2950 if (cancel_cmd
== NULL
) {
2951 pmcraid_err("%s: no cmd blocks are available\n", __func__
);
2955 pmcraid_prepare_cancel_cmd(cancel_cmd
, cmd
);
2957 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2958 cmd
->ioa_cb
->ioarcb
.cdb
[0],
2959 cmd
->ioa_cb
->ioarcb
.response_handle
>> 2);
2961 init_completion(&cancel_cmd
->wait_for_completion
);
2962 cancel_cmd
->completion_req
= 1;
2964 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2965 le32_to_cpu(cancel_cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
2966 cancel_cmd
->ioa_cb
->ioarcb
.cdb
[0],
2967 le32_to_cpu(cancel_cmd
->ioa_cb
->ioarcb
.resource_handle
));
2969 pmcraid_send_cmd(cancel_cmd
,
2970 pmcraid_internal_done
,
2971 PMCRAID_INTERNAL_TIMEOUT
,
2972 pmcraid_timeout_handler
);
2977 * pmcraid_abort_complete - Waits for ABORT TASK completion
2979 * @cancel_cmd: command block use as cancelling command
2982 * returns SUCCESS if ABORT TASK has good completion
2985 static int pmcraid_abort_complete(struct pmcraid_cmd
*cancel_cmd
)
2987 struct pmcraid_resource_entry
*res
;
2990 wait_for_completion(&cancel_cmd
->wait_for_completion
);
2991 res
= cancel_cmd
->res
;
2992 cancel_cmd
->res
= NULL
;
2993 ioasc
= le32_to_cpu(cancel_cmd
->ioa_cb
->ioasa
.ioasc
);
2995 /* If the abort task is not timed out we will get a Good completion
2996 * as sense_key, otherwise we may get one the following responses
2997 * due to subsequent bus reset or device reset. In case IOASC is
2998 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
3000 if (ioasc
== PMCRAID_IOASC_UA_BUS_WAS_RESET
||
3001 ioasc
== PMCRAID_IOASC_NR_SYNC_REQUIRED
) {
3002 if (ioasc
== PMCRAID_IOASC_NR_SYNC_REQUIRED
)
3007 /* complete the command here itself */
3008 pmcraid_return_cmd(cancel_cmd
);
3009 return PMCRAID_IOASC_SENSE_KEY(ioasc
) ? FAILED
: SUCCESS
;
3013 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3015 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3016 * mid-layer ensures that no other commands are queued. This
3017 * never gets called under interrupt, but a separate eh thread.
3022 static int pmcraid_eh_abort_handler(struct scsi_cmnd
*scsi_cmd
)
3024 struct pmcraid_instance
*pinstance
;
3025 struct pmcraid_cmd
*cmd
;
3026 struct pmcraid_resource_entry
*res
;
3027 unsigned long host_lock_flags
;
3028 unsigned long pending_lock_flags
;
3029 struct pmcraid_cmd
*cancel_cmd
= NULL
;
3034 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
3036 scmd_printk(KERN_INFO
, scsi_cmd
,
3037 "I/O command timed out, aborting it.\n");
3039 res
= scsi_cmd
->device
->hostdata
;
3044 /* If we are currently going through reset/reload, return failed.
3045 * This will force the mid-layer to eventually call
3046 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3049 spin_lock_irqsave(pinstance
->host
->host_lock
, host_lock_flags
);
3051 if (pinstance
->ioa_reset_in_progress
||
3052 pinstance
->ioa_state
== IOA_STATE_DEAD
) {
3053 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
3058 /* loop over pending cmd list to find cmd corresponding to this
3059 * scsi_cmd. Note that this command might not have been completed
3060 * already. locking: all pending commands are protected with
3061 * pending_pool_lock.
3063 spin_lock_irqsave(&pinstance
->pending_pool_lock
, pending_lock_flags
);
3064 list_for_each_entry(cmd
, &pinstance
->pending_cmd_pool
, free_list
) {
3066 if (cmd
->scsi_cmd
== scsi_cmd
) {
3072 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
,
3073 pending_lock_flags
);
3075 /* If the command to be aborted was given to IOA and still pending with
3076 * it, send ABORT_TASK to abort this and wait for its completion
3079 cancel_cmd
= pmcraid_abort_cmd(cmd
);
3081 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
3085 cancel_cmd
->res
= cmd
->scsi_cmd
->device
->hostdata
;
3086 rc
= pmcraid_abort_complete(cancel_cmd
);
3089 return cmd_found
? rc
: SUCCESS
;
3093 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3095 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3097 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3098 * Since these are called from mid-layer EH thread, no other IO will be queued
3099 * to the resource being reset. However, control path (IOCTL) may be active so
3100 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3101 * takes care by locking/unlocking host_lock.
3106 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd
*scmd
)
3108 scmd_printk(KERN_INFO
, scmd
,
3109 "resetting device due to an I/O command timeout.\n");
3110 return pmcraid_reset_device(scmd
,
3111 PMCRAID_INTERNAL_TIMEOUT
,
3115 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd
*scmd
)
3117 scmd_printk(KERN_INFO
, scmd
,
3118 "Doing bus reset due to an I/O command timeout.\n");
3119 return pmcraid_reset_device(scmd
,
3120 PMCRAID_RESET_BUS_TIMEOUT
,
3124 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd
*scmd
)
3126 scmd_printk(KERN_INFO
, scmd
,
3127 "Doing target reset due to an I/O command timeout.\n");
3128 return pmcraid_reset_device(scmd
,
3129 PMCRAID_INTERNAL_TIMEOUT
,
3130 RESET_DEVICE_TARGET
);
3134 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3136 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3138 * Initiates adapter reset to bring it up to operational state
3143 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd
*scmd
)
3145 unsigned long interval
= 10000; /* 10 seconds interval */
3146 int waits
= jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT
) / interval
;
3147 struct pmcraid_instance
*pinstance
=
3148 (struct pmcraid_instance
*)(scmd
->device
->host
->hostdata
);
3151 /* wait for an additional 150 seconds just in case firmware could come
3152 * up and if it could complete all the pending commands excluding the
3153 * two HCAM (CCN and LDN).
3156 if (atomic_read(&pinstance
->outstanding_cmds
) <=
3157 PMCRAID_MAX_HCAM_CMD
)
3162 dev_err(&pinstance
->pdev
->dev
,
3163 "Adapter being reset due to an I/O command timeout.\n");
3164 return pmcraid_reset_bringup(pinstance
) == 0 ? SUCCESS
: FAILED
;
3168 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3169 * @scsi_cmd: scsi command struct
3172 * number of tags or 0 if the task is not tagged
3174 static u8
pmcraid_task_attributes(struct scsi_cmnd
*scsi_cmd
)
3179 if (scsi_populate_tag_msg(scsi_cmd
, tag
)) {
3181 case MSG_SIMPLE_TAG
:
3182 rc
= TASK_TAG_SIMPLE
;
3185 rc
= TASK_TAG_QUEUE_HEAD
;
3187 case MSG_ORDERED_TAG
:
3188 rc
= TASK_TAG_ORDERED
;
3198 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3199 * @cmd: pmcraid command struct
3200 * @sgcount: count of scatter-gather elements
3203 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3204 * or external IOADLs
3206 struct pmcraid_ioadl_desc
*
3207 pmcraid_init_ioadls(struct pmcraid_cmd
*cmd
, int sgcount
)
3209 struct pmcraid_ioadl_desc
*ioadl
;
3210 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
3211 int ioadl_count
= 0;
3213 if (ioarcb
->add_cmd_param_length
)
3214 ioadl_count
= DIV_ROUND_UP(ioarcb
->add_cmd_param_length
, 16);
3215 ioarcb
->ioadl_length
=
3216 sizeof(struct pmcraid_ioadl_desc
) * sgcount
;
3218 if ((sgcount
+ ioadl_count
) > (ARRAY_SIZE(ioarcb
->add_data
.u
.ioadl
))) {
3219 /* external ioadls start at offset 0x80 from control_block
3220 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3221 * It is necessary to indicate to firmware that driver is
3222 * using ioadls to be treated as external to IOARCB.
3224 ioarcb
->ioarcb_bus_addr
&= ~(0x1FULL
);
3225 ioarcb
->ioadl_bus_addr
=
3226 cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
3227 offsetof(struct pmcraid_ioarcb
,
3228 add_data
.u
.ioadl
[3]));
3229 ioadl
= &ioarcb
->add_data
.u
.ioadl
[3];
3231 ioarcb
->ioadl_bus_addr
=
3232 cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
3233 offsetof(struct pmcraid_ioarcb
,
3234 add_data
.u
.ioadl
[ioadl_count
]));
3236 ioadl
= &ioarcb
->add_data
.u
.ioadl
[ioadl_count
];
3237 ioarcb
->ioarcb_bus_addr
|=
3238 DIV_ROUND_CLOSEST(sgcount
+ ioadl_count
, 8);
3245 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3246 * @pinstance: pointer to adapter instance structure
3247 * @cmd: pmcraid command struct
3249 * This function is invoked by queuecommand entry point while sending a command
3250 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3253 * 0 on success or -1 on failure
3255 static int pmcraid_build_ioadl(
3256 struct pmcraid_instance
*pinstance
,
3257 struct pmcraid_cmd
*cmd
3261 struct scatterlist
*sglist
;
3263 struct scsi_cmnd
*scsi_cmd
= cmd
->scsi_cmd
;
3264 struct pmcraid_ioarcb
*ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3265 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
3267 u32 length
= scsi_bufflen(scsi_cmd
);
3272 nseg
= scsi_dma_map(scsi_cmd
);
3275 scmd_printk(KERN_ERR
, scsi_cmd
, "scsi_map_dma failed!\n");
3277 } else if (nseg
> PMCRAID_MAX_IOADLS
) {
3278 scsi_dma_unmap(scsi_cmd
);
3279 scmd_printk(KERN_ERR
, scsi_cmd
,
3280 "sg count is (%d) more than allowed!\n", nseg
);
3284 /* Initialize IOARCB data transfer length fields */
3285 if (scsi_cmd
->sc_data_direction
== DMA_TO_DEVICE
)
3286 ioarcb
->request_flags0
|= TRANSFER_DIR_WRITE
;
3288 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3289 ioarcb
->data_transfer_length
= cpu_to_le32(length
);
3290 ioadl
= pmcraid_init_ioadls(cmd
, nseg
);
3292 /* Initialize IOADL descriptor addresses */
3293 scsi_for_each_sg(scsi_cmd
, sglist
, nseg
, i
) {
3294 ioadl
[i
].data_len
= cpu_to_le32(sg_dma_len(sglist
));
3295 ioadl
[i
].address
= cpu_to_le64(sg_dma_address(sglist
));
3298 /* setup last descriptor */
3299 ioadl
[i
- 1].flags
= IOADL_FLAGS_LAST_DESC
;
3305 * pmcraid_free_sglist - Frees an allocated SG buffer list
3306 * @sglist: scatter/gather list pointer
3308 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3313 static void pmcraid_free_sglist(struct pmcraid_sglist
*sglist
)
3317 for (i
= 0; i
< sglist
->num_sg
; i
++)
3318 __free_pages(sg_page(&(sglist
->scatterlist
[i
])),
3325 * pmcraid_alloc_sglist - Allocates memory for a SG list
3326 * @buflen: buffer length
3328 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3332 * pointer to sglist / NULL on failure
3334 static struct pmcraid_sglist
*pmcraid_alloc_sglist(int buflen
)
3336 struct pmcraid_sglist
*sglist
;
3337 struct scatterlist
*scatterlist
;
3344 sg_size
= buflen
/ (PMCRAID_MAX_IOADLS
- 1);
3345 order
= (sg_size
> 0) ? get_order(sg_size
) : 0;
3346 bsize_elem
= PAGE_SIZE
* (1 << order
);
3348 /* Determine the actual number of sg entries needed */
3349 if (buflen
% bsize_elem
)
3350 num_elem
= (buflen
/ bsize_elem
) + 1;
3352 num_elem
= buflen
/ bsize_elem
;
3354 /* Allocate a scatter/gather list for the DMA */
3355 sglist
= kzalloc(sizeof(struct pmcraid_sglist
) +
3356 (sizeof(struct scatterlist
) * (num_elem
- 1)),
3362 scatterlist
= sglist
->scatterlist
;
3363 sg_init_table(scatterlist
, num_elem
);
3364 sglist
->order
= order
;
3365 sglist
->num_sg
= num_elem
;
3368 for (i
= 0; i
< num_elem
; i
++) {
3369 page
= alloc_pages(GFP_KERNEL
|GFP_DMA
|__GFP_ZERO
, order
);
3371 for (j
= i
- 1; j
>= 0; j
--)
3372 __free_pages(sg_page(&scatterlist
[j
]), order
);
3377 sg_set_page(&scatterlist
[i
], page
,
3378 sg_size
< bsize_elem
? sg_size
: bsize_elem
, 0);
3379 sg_size
-= bsize_elem
;
3386 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3387 * @sglist: scatter/gather list pointer
3388 * @buffer: buffer pointer
3389 * @len: buffer length
3390 * @direction: data transfer direction
3392 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3395 * 0 on success / other on failure
3397 static int pmcraid_copy_sglist(
3398 struct pmcraid_sglist
*sglist
,
3399 unsigned long buffer
,
3404 struct scatterlist
*scatterlist
;
3410 /* Determine the actual number of bytes per element */
3411 bsize_elem
= PAGE_SIZE
* (1 << sglist
->order
);
3413 scatterlist
= sglist
->scatterlist
;
3415 for (i
= 0; i
< (len
/ bsize_elem
); i
++, buffer
+= bsize_elem
) {
3416 struct page
*page
= sg_page(&scatterlist
[i
]);
3419 if (direction
== DMA_TO_DEVICE
)
3420 rc
= __copy_from_user(kaddr
,
3424 rc
= __copy_to_user((void *)buffer
, kaddr
, bsize_elem
);
3429 pmcraid_err("failed to copy user data into sg list\n");
3433 scatterlist
[i
].length
= bsize_elem
;
3436 if (len
% bsize_elem
) {
3437 struct page
*page
= sg_page(&scatterlist
[i
]);
3441 if (direction
== DMA_TO_DEVICE
)
3442 rc
= __copy_from_user(kaddr
,
3446 rc
= __copy_to_user((void *)buffer
,
3452 scatterlist
[i
].length
= len
% bsize_elem
;
3456 pmcraid_err("failed to copy user data into sg list\n");
3464 * pmcraid_queuecommand - Queue a mid-layer request
3465 * @scsi_cmd: scsi command struct
3466 * @done: done function
3468 * This function queues a request generated by the mid-layer. Midlayer calls
3469 * this routine within host->lock. Some of the functions called by queuecommand
3470 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3474 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3475 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3477 static int pmcraid_queuecommand_lck(
3478 struct scsi_cmnd
*scsi_cmd
,
3479 void (*done
) (struct scsi_cmnd
*)
3482 struct pmcraid_instance
*pinstance
;
3483 struct pmcraid_resource_entry
*res
;
3484 struct pmcraid_ioarcb
*ioarcb
;
3485 struct pmcraid_cmd
*cmd
;
3490 (struct pmcraid_instance
*)scsi_cmd
->device
->host
->hostdata
;
3491 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
3492 scsi_cmd
->scsi_done
= done
;
3493 res
= scsi_cmd
->device
->hostdata
;
3494 scsi_cmd
->result
= (DID_OK
<< 16);
3496 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3499 if (pinstance
->ioa_state
== IOA_STATE_DEAD
) {
3500 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3501 scsi_cmd
->result
= (DID_NO_CONNECT
<< 16);
3502 scsi_cmd
->scsi_done(scsi_cmd
);
3506 /* If IOA reset is in progress, can't queue the commands */
3507 if (pinstance
->ioa_reset_in_progress
)
3508 return SCSI_MLQUEUE_HOST_BUSY
;
3510 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3511 * the command here itself with success return
3513 if (scsi_cmd
->cmnd
[0] == SYNCHRONIZE_CACHE
) {
3514 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3515 scsi_cmd
->scsi_done(scsi_cmd
);
3519 /* initialize the command and IOARCB to be sent to IOA */
3520 cmd
= pmcraid_get_free_cmd(pinstance
);
3523 pmcraid_err("free command block is not available\n");
3524 return SCSI_MLQUEUE_HOST_BUSY
;
3527 cmd
->scsi_cmd
= scsi_cmd
;
3528 ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3529 memcpy(ioarcb
->cdb
, scsi_cmd
->cmnd
, scsi_cmd
->cmd_len
);
3530 ioarcb
->resource_handle
= res
->cfg_entry
.resource_handle
;
3531 ioarcb
->request_type
= REQ_TYPE_SCSI
;
3533 /* set hrrq number where the IOA should respond to. Note that all cmds
3534 * generated internally uses hrrq_id 0, exception to this is the cmd
3535 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3536 * hrrq_id assigned here in queuecommand
3538 ioarcb
->hrrq_id
= atomic_add_return(1, &(pinstance
->last_message_id
)) %
3539 pinstance
->num_hrrq
;
3540 cmd
->cmd_done
= pmcraid_io_done
;
3542 if (RES_IS_GSCSI(res
->cfg_entry
) || RES_IS_VSET(res
->cfg_entry
)) {
3543 if (scsi_cmd
->underflow
== 0)
3544 ioarcb
->request_flags0
|= INHIBIT_UL_CHECK
;
3546 if (res
->sync_reqd
) {
3547 ioarcb
->request_flags0
|= SYNC_COMPLETE
;
3551 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3552 ioarcb
->request_flags1
|= pmcraid_task_attributes(scsi_cmd
);
3554 if (RES_IS_GSCSI(res
->cfg_entry
))
3555 ioarcb
->request_flags1
|= DELAY_AFTER_RESET
;
3558 rc
= pmcraid_build_ioadl(pinstance
, cmd
);
3560 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3561 le32_to_cpu(ioarcb
->response_handle
) >> 2,
3562 scsi_cmd
->cmnd
[0], pinstance
->host
->unique_id
,
3563 RES_IS_VSET(res
->cfg_entry
) ? PMCRAID_VSET_BUS_ID
:
3564 PMCRAID_PHYS_BUS_ID
,
3565 RES_IS_VSET(res
->cfg_entry
) ?
3566 (fw_version
<= PMCRAID_FW_VERSION_1
?
3567 res
->cfg_entry
.unique_flags1
:
3568 res
->cfg_entry
.array_id
& 0xFF) :
3569 RES_TARGET(res
->cfg_entry
.resource_address
),
3570 RES_LUN(res
->cfg_entry
.resource_address
));
3572 if (likely(rc
== 0)) {
3573 _pmcraid_fire_command(cmd
);
3575 pmcraid_err("queuecommand could not build ioadl\n");
3576 pmcraid_return_cmd(cmd
);
3577 rc
= SCSI_MLQUEUE_HOST_BUSY
;
3583 static DEF_SCSI_QCMD(pmcraid_queuecommand
)
3586 * pmcraid_open -char node "open" entry, allowed only users with admin access
3588 static int pmcraid_chr_open(struct inode
*inode
, struct file
*filep
)
3590 struct pmcraid_instance
*pinstance
;
3592 if (!capable(CAP_SYS_ADMIN
))
3595 /* Populate adapter instance * pointer for use by ioctl */
3596 pinstance
= container_of(inode
->i_cdev
, struct pmcraid_instance
, cdev
);
3597 filep
->private_data
= pinstance
;
3603 * pmcraid_fasync - Async notifier registration from applications
3605 * This function adds the calling process to a driver global queue. When an
3606 * event occurs, SIGIO will be sent to all processes in this queue.
3608 static int pmcraid_chr_fasync(int fd
, struct file
*filep
, int mode
)
3610 struct pmcraid_instance
*pinstance
;
3613 pinstance
= filep
->private_data
;
3614 mutex_lock(&pinstance
->aen_queue_lock
);
3615 rc
= fasync_helper(fd
, filep
, mode
, &pinstance
->aen_queue
);
3616 mutex_unlock(&pinstance
->aen_queue_lock
);
3623 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3624 * commands sent over IOCTL interface
3626 * @cmd : pointer to struct pmcraid_cmd
3627 * @buflen : length of the request buffer
3628 * @direction : data transfer direction
3631 * 0 on success, non-zero error code on failure
3633 static int pmcraid_build_passthrough_ioadls(
3634 struct pmcraid_cmd
*cmd
,
3639 struct pmcraid_sglist
*sglist
= NULL
;
3640 struct scatterlist
*sg
= NULL
;
3641 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
3642 struct pmcraid_ioadl_desc
*ioadl
;
3645 sglist
= pmcraid_alloc_sglist(buflen
);
3648 pmcraid_err("can't allocate memory for passthrough SGls\n");
3652 sglist
->num_dma_sg
= pci_map_sg(cmd
->drv_inst
->pdev
,
3653 sglist
->scatterlist
,
3654 sglist
->num_sg
, direction
);
3656 if (!sglist
->num_dma_sg
|| sglist
->num_dma_sg
> PMCRAID_MAX_IOADLS
) {
3657 dev_err(&cmd
->drv_inst
->pdev
->dev
,
3658 "Failed to map passthrough buffer!\n");
3659 pmcraid_free_sglist(sglist
);
3663 cmd
->sglist
= sglist
;
3664 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
3666 ioadl
= pmcraid_init_ioadls(cmd
, sglist
->num_dma_sg
);
3668 /* Initialize IOADL descriptor addresses */
3669 for_each_sg(sglist
->scatterlist
, sg
, sglist
->num_dma_sg
, i
) {
3670 ioadl
[i
].data_len
= cpu_to_le32(sg_dma_len(sg
));
3671 ioadl
[i
].address
= cpu_to_le64(sg_dma_address(sg
));
3675 /* setup the last descriptor */
3676 ioadl
[i
- 1].flags
= IOADL_FLAGS_LAST_DESC
;
3683 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3685 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3686 * @buflen: size of the request buffer
3687 * @direction: data transfer direction
3690 * 0 on success, non-zero error code on failure
3692 static void pmcraid_release_passthrough_ioadls(
3693 struct pmcraid_cmd
*cmd
,
3698 struct pmcraid_sglist
*sglist
= cmd
->sglist
;
3701 pci_unmap_sg(cmd
->drv_inst
->pdev
,
3702 sglist
->scatterlist
,
3705 pmcraid_free_sglist(sglist
);
3711 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3713 * @pinstance: pointer to adapter instance structure
3715 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3718 * 0 on success, non-zero error code on failure
3720 static long pmcraid_ioctl_passthrough(
3721 struct pmcraid_instance
*pinstance
,
3722 unsigned int ioctl_cmd
,
3723 unsigned int buflen
,
3727 struct pmcraid_passthrough_ioctl_buffer
*buffer
;
3728 struct pmcraid_ioarcb
*ioarcb
;
3729 struct pmcraid_cmd
*cmd
;
3730 struct pmcraid_cmd
*cancel_cmd
;
3731 unsigned long request_buffer
;
3732 unsigned long request_offset
;
3733 unsigned long lock_flags
;
3738 u8 access
, direction
;
3741 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3742 if (pinstance
->ioa_reset_in_progress
) {
3743 rc
= wait_event_interruptible_timeout(
3744 pinstance
->reset_wait_q
,
3745 !pinstance
->ioa_reset_in_progress
,
3746 msecs_to_jiffies(10000));
3751 return -ERESTARTSYS
;
3754 /* If adapter is not in operational state, return error */
3755 if (pinstance
->ioa_state
!= IOA_STATE_OPERATIONAL
) {
3756 pmcraid_err("IOA is not operational\n");
3760 buffer_size
= sizeof(struct pmcraid_passthrough_ioctl_buffer
);
3761 buffer
= kmalloc(buffer_size
, GFP_KERNEL
);
3764 pmcraid_err("no memory for passthrough buffer\n");
3769 offsetof(struct pmcraid_passthrough_ioctl_buffer
, request_buffer
);
3771 request_buffer
= arg
+ request_offset
;
3773 rc
= __copy_from_user(buffer
,
3774 (struct pmcraid_passthrough_ioctl_buffer
*) arg
,
3775 sizeof(struct pmcraid_passthrough_ioctl_buffer
));
3779 offsetof(struct pmcraid_passthrough_ioctl_buffer
, ioasa
));
3782 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3784 goto out_free_buffer
;
3787 request_size
= buffer
->ioarcb
.data_transfer_length
;
3789 if (buffer
->ioarcb
.request_flags0
& TRANSFER_DIR_WRITE
) {
3790 access
= VERIFY_READ
;
3791 direction
= DMA_TO_DEVICE
;
3793 access
= VERIFY_WRITE
;
3794 direction
= DMA_FROM_DEVICE
;
3797 if (request_size
> 0) {
3798 rc
= access_ok(access
, arg
, request_offset
+ request_size
);
3802 goto out_free_buffer
;
3804 } else if (request_size
< 0) {
3806 goto out_free_buffer
;
3809 /* check if we have any additional command parameters */
3810 if (buffer
->ioarcb
.add_cmd_param_length
> PMCRAID_ADD_CMD_PARAM_LEN
) {
3812 goto out_free_buffer
;
3815 cmd
= pmcraid_get_free_cmd(pinstance
);
3818 pmcraid_err("free command block is not available\n");
3820 goto out_free_buffer
;
3823 cmd
->scsi_cmd
= NULL
;
3824 ioarcb
= &(cmd
->ioa_cb
->ioarcb
);
3826 /* Copy the user-provided IOARCB stuff field by field */
3827 ioarcb
->resource_handle
= buffer
->ioarcb
.resource_handle
;
3828 ioarcb
->data_transfer_length
= buffer
->ioarcb
.data_transfer_length
;
3829 ioarcb
->cmd_timeout
= buffer
->ioarcb
.cmd_timeout
;
3830 ioarcb
->request_type
= buffer
->ioarcb
.request_type
;
3831 ioarcb
->request_flags0
= buffer
->ioarcb
.request_flags0
;
3832 ioarcb
->request_flags1
= buffer
->ioarcb
.request_flags1
;
3833 memcpy(ioarcb
->cdb
, buffer
->ioarcb
.cdb
, PMCRAID_MAX_CDB_LEN
);
3835 if (buffer
->ioarcb
.add_cmd_param_length
) {
3836 ioarcb
->add_cmd_param_length
=
3837 buffer
->ioarcb
.add_cmd_param_length
;
3838 ioarcb
->add_cmd_param_offset
=
3839 buffer
->ioarcb
.add_cmd_param_offset
;
3840 memcpy(ioarcb
->add_data
.u
.add_cmd_params
,
3841 buffer
->ioarcb
.add_data
.u
.add_cmd_params
,
3842 buffer
->ioarcb
.add_cmd_param_length
);
3845 /* set hrrq number where the IOA should respond to. Note that all cmds
3846 * generated internally uses hrrq_id 0, exception to this is the cmd
3847 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3848 * hrrq_id assigned here in queuecommand
3850 ioarcb
->hrrq_id
= atomic_add_return(1, &(pinstance
->last_message_id
)) %
3851 pinstance
->num_hrrq
;
3854 rc
= pmcraid_build_passthrough_ioadls(cmd
,
3858 pmcraid_err("couldn't build passthrough ioadls\n");
3859 goto out_free_buffer
;
3861 } else if (request_size
< 0) {
3863 goto out_free_buffer
;
3866 /* If data is being written into the device, copy the data from user
3869 if (direction
== DMA_TO_DEVICE
&& request_size
> 0) {
3870 rc
= pmcraid_copy_sglist(cmd
->sglist
,
3875 pmcraid_err("failed to copy user buffer\n");
3876 goto out_free_sglist
;
3880 /* passthrough ioctl is a blocking command so, put the user to sleep
3881 * until timeout. Note that a timeout value of 0 means, do timeout.
3883 cmd
->cmd_done
= pmcraid_internal_done
;
3884 init_completion(&cmd
->wait_for_completion
);
3885 cmd
->completion_req
= 1;
3887 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3888 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
) >> 2,
3889 cmd
->ioa_cb
->ioarcb
.cdb
[0],
3890 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.resource_handle
));
3892 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
3893 _pmcraid_fire_command(cmd
);
3894 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
3896 /* NOTE ! Remove the below line once abort_task is implemented
3897 * in firmware. This line disables ioctl command timeout handling logic
3898 * similar to IO command timeout handling, making ioctl commands to wait
3899 * until the command completion regardless of timeout value specified in
3902 buffer
->ioarcb
.cmd_timeout
= 0;
3904 /* If command timeout is specified put caller to wait till that time,
3905 * otherwise it would be blocking wait. If command gets timed out, it
3908 if (buffer
->ioarcb
.cmd_timeout
== 0) {
3909 wait_for_completion(&cmd
->wait_for_completion
);
3910 } else if (!wait_for_completion_timeout(
3911 &cmd
->wait_for_completion
,
3912 msecs_to_jiffies(buffer
->ioarcb
.cmd_timeout
* 1000))) {
3914 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3915 le32_to_cpu(cmd
->ioa_cb
->ioarcb
.response_handle
>> 2),
3916 cmd
->ioa_cb
->ioarcb
.cdb
[0]);
3918 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
3919 cancel_cmd
= pmcraid_abort_cmd(cmd
);
3920 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
3923 wait_for_completion(&cancel_cmd
->wait_for_completion
);
3924 ioasc
= cancel_cmd
->ioa_cb
->ioasa
.ioasc
;
3925 pmcraid_return_cmd(cancel_cmd
);
3927 /* if abort task couldn't find the command i.e it got
3928 * completed prior to aborting, return good completion.
3929 * if command got aborted successfully or there was IOA
3930 * reset due to abort task itself getting timedout then
3933 if (ioasc
== PMCRAID_IOASC_IOA_WAS_RESET
||
3934 PMCRAID_IOASC_SENSE_KEY(ioasc
) == 0x00) {
3935 if (ioasc
!= PMCRAID_IOASC_GC_IOARCB_NOTFOUND
)
3937 goto out_handle_response
;
3941 /* no command block for abort task or abort task failed to abort
3942 * the IOARCB, then wait for 150 more seconds and initiate reset
3943 * sequence after timeout
3945 if (!wait_for_completion_timeout(
3946 &cmd
->wait_for_completion
,
3947 msecs_to_jiffies(150 * 1000))) {
3948 pmcraid_reset_bringup(cmd
->drv_inst
);
3953 out_handle_response
:
3954 /* copy entire IOASA buffer and return IOCTL success.
3955 * If copying IOASA to user-buffer fails, return
3958 if (copy_to_user(ioasa
, &cmd
->ioa_cb
->ioasa
,
3959 sizeof(struct pmcraid_ioasa
))) {
3960 pmcraid_err("failed to copy ioasa buffer to user\n");
3964 /* If the data transfer was from device, copy the data onto user
3967 else if (direction
== DMA_FROM_DEVICE
&& request_size
> 0) {
3968 rc
= pmcraid_copy_sglist(cmd
->sglist
,
3973 pmcraid_err("failed to copy user buffer\n");
3979 pmcraid_release_passthrough_ioadls(cmd
, request_size
, direction
);
3980 pmcraid_return_cmd(cmd
);
3992 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3994 * @pinstance: pointer to adapter instance structure
3995 * @cmd: ioctl command passed in
3996 * @buflen: length of user_buffer
3997 * @user_buffer: user buffer pointer
4000 * 0 in case of success, otherwise appropriate error code
4002 static long pmcraid_ioctl_driver(
4003 struct pmcraid_instance
*pinstance
,
4005 unsigned int buflen
,
4006 void __user
*user_buffer
4011 if (!access_ok(VERIFY_READ
, user_buffer
, _IOC_SIZE(cmd
))) {
4012 pmcraid_err("ioctl_driver: access fault in request buffer\n");
4017 case PMCRAID_IOCTL_RESET_ADAPTER
:
4018 pmcraid_reset_bringup(pinstance
);
4030 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4032 * @cmd: ioctl command
4034 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4037 * negetive error code if there are access issues, otherwise zero.
4038 * Upon success, returns ioctl header copied out of user buffer.
4041 static int pmcraid_check_ioctl_buffer(
4044 struct pmcraid_ioctl_header
*hdr
4048 int access
= VERIFY_READ
;
4050 if (copy_from_user(hdr
, arg
, sizeof(struct pmcraid_ioctl_header
))) {
4051 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4055 /* check for valid driver signature */
4056 rc
= memcmp(hdr
->signature
,
4057 PMCRAID_IOCTL_SIGNATURE
,
4058 sizeof(hdr
->signature
));
4060 pmcraid_err("signature verification failed\n");
4064 /* check for appropriate buffer access */
4065 if ((_IOC_DIR(cmd
) & _IOC_READ
) == _IOC_READ
)
4066 access
= VERIFY_WRITE
;
4068 rc
= access_ok(access
,
4069 (arg
+ sizeof(struct pmcraid_ioctl_header
)),
4070 hdr
->buffer_length
);
4072 pmcraid_err("access failed for user buffer of size %d\n",
4073 hdr
->buffer_length
);
4081 * pmcraid_ioctl - char node ioctl entry point
4083 static long pmcraid_chr_ioctl(
4089 struct pmcraid_instance
*pinstance
= NULL
;
4090 struct pmcraid_ioctl_header
*hdr
= NULL
;
4091 int retval
= -ENOTTY
;
4093 hdr
= kmalloc(sizeof(struct pmcraid_ioctl_header
), GFP_KERNEL
);
4096 pmcraid_err("failed to allocate memory for ioctl header\n");
4100 retval
= pmcraid_check_ioctl_buffer(cmd
, (void *)arg
, hdr
);
4103 pmcraid_info("chr_ioctl: header check failed\n");
4108 pinstance
= filep
->private_data
;
4111 pmcraid_info("adapter instance is not found\n");
4116 switch (_IOC_TYPE(cmd
)) {
4118 case PMCRAID_PASSTHROUGH_IOCTL
:
4119 /* If ioctl code is to download microcode, we need to block
4120 * mid-layer requests.
4122 if (cmd
== PMCRAID_IOCTL_DOWNLOAD_MICROCODE
)
4123 scsi_block_requests(pinstance
->host
);
4125 retval
= pmcraid_ioctl_passthrough(pinstance
,
4130 if (cmd
== PMCRAID_IOCTL_DOWNLOAD_MICROCODE
)
4131 scsi_unblock_requests(pinstance
->host
);
4134 case PMCRAID_DRIVER_IOCTL
:
4135 arg
+= sizeof(struct pmcraid_ioctl_header
);
4136 retval
= pmcraid_ioctl_driver(pinstance
,
4139 (void __user
*)arg
);
4153 * File operations structure for management interface
4155 static const struct file_operations pmcraid_fops
= {
4156 .owner
= THIS_MODULE
,
4157 .open
= pmcraid_chr_open
,
4158 .fasync
= pmcraid_chr_fasync
,
4159 .unlocked_ioctl
= pmcraid_chr_ioctl
,
4160 #ifdef CONFIG_COMPAT
4161 .compat_ioctl
= pmcraid_chr_ioctl
,
4163 .llseek
= noop_llseek
,
4170 * pmcraid_show_log_level - Display adapter's error logging level
4171 * @dev: class device struct
4175 * number of bytes printed to buffer
4177 static ssize_t
pmcraid_show_log_level(
4179 struct device_attribute
*attr
,
4182 struct Scsi_Host
*shost
= class_to_shost(dev
);
4183 struct pmcraid_instance
*pinstance
=
4184 (struct pmcraid_instance
*)shost
->hostdata
;
4185 return snprintf(buf
, PAGE_SIZE
, "%d\n", pinstance
->current_log_level
);
4189 * pmcraid_store_log_level - Change the adapter's error logging level
4190 * @dev: class device struct
4195 * number of bytes printed to buffer
4197 static ssize_t
pmcraid_store_log_level(
4199 struct device_attribute
*attr
,
4204 struct Scsi_Host
*shost
;
4205 struct pmcraid_instance
*pinstance
;
4208 if (strict_strtoul(buf
, 10, &val
))
4210 /* log-level should be from 0 to 2 */
4214 shost
= class_to_shost(dev
);
4215 pinstance
= (struct pmcraid_instance
*)shost
->hostdata
;
4216 pinstance
->current_log_level
= val
;
4221 static struct device_attribute pmcraid_log_level_attr
= {
4223 .name
= "log_level",
4224 .mode
= S_IRUGO
| S_IWUSR
,
4226 .show
= pmcraid_show_log_level
,
4227 .store
= pmcraid_store_log_level
,
4231 * pmcraid_show_drv_version - Display driver version
4232 * @dev: class device struct
4236 * number of bytes printed to buffer
4238 static ssize_t
pmcraid_show_drv_version(
4240 struct device_attribute
*attr
,
4244 return snprintf(buf
, PAGE_SIZE
, "version: %s\n",
4245 PMCRAID_DRIVER_VERSION
);
4248 static struct device_attribute pmcraid_driver_version_attr
= {
4250 .name
= "drv_version",
4253 .show
= pmcraid_show_drv_version
,
4257 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4258 * @dev: class device struct
4262 * number of bytes printed to buffer
4264 static ssize_t
pmcraid_show_adapter_id(
4266 struct device_attribute
*attr
,
4270 struct Scsi_Host
*shost
= class_to_shost(dev
);
4271 struct pmcraid_instance
*pinstance
=
4272 (struct pmcraid_instance
*)shost
->hostdata
;
4273 u32 adapter_id
= (pinstance
->pdev
->bus
->number
<< 8) |
4274 pinstance
->pdev
->devfn
;
4275 u32 aen_group
= pmcraid_event_family
.id
;
4277 return snprintf(buf
, PAGE_SIZE
,
4278 "adapter id: %d\nminor: %d\naen group: %d\n",
4279 adapter_id
, MINOR(pinstance
->cdev
.dev
), aen_group
);
4282 static struct device_attribute pmcraid_adapter_id_attr
= {
4284 .name
= "adapter_id",
4285 .mode
= S_IRUGO
| S_IWUSR
,
4287 .show
= pmcraid_show_adapter_id
,
4290 static struct device_attribute
*pmcraid_host_attrs
[] = {
4291 &pmcraid_log_level_attr
,
4292 &pmcraid_driver_version_attr
,
4293 &pmcraid_adapter_id_attr
,
4298 /* host template structure for pmcraid driver */
4299 static struct scsi_host_template pmcraid_host_template
= {
4300 .module
= THIS_MODULE
,
4301 .name
= PMCRAID_DRIVER_NAME
,
4302 .queuecommand
= pmcraid_queuecommand
,
4303 .eh_abort_handler
= pmcraid_eh_abort_handler
,
4304 .eh_bus_reset_handler
= pmcraid_eh_bus_reset_handler
,
4305 .eh_target_reset_handler
= pmcraid_eh_target_reset_handler
,
4306 .eh_device_reset_handler
= pmcraid_eh_device_reset_handler
,
4307 .eh_host_reset_handler
= pmcraid_eh_host_reset_handler
,
4309 .slave_alloc
= pmcraid_slave_alloc
,
4310 .slave_configure
= pmcraid_slave_configure
,
4311 .slave_destroy
= pmcraid_slave_destroy
,
4312 .change_queue_depth
= pmcraid_change_queue_depth
,
4313 .change_queue_type
= pmcraid_change_queue_type
,
4314 .can_queue
= PMCRAID_MAX_IO_CMD
,
4316 .sg_tablesize
= PMCRAID_MAX_IOADLS
,
4317 .max_sectors
= PMCRAID_IOA_MAX_SECTORS
,
4318 .cmd_per_lun
= PMCRAID_MAX_CMD_PER_LUN
,
4319 .use_clustering
= ENABLE_CLUSTERING
,
4320 .shost_attrs
= pmcraid_host_attrs
,
4321 .proc_name
= PMCRAID_DRIVER_NAME
4325 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4326 * @irq: interrupt vector number
4327 * @dev_id: pointer hrrq_vector
4330 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4333 static irqreturn_t
pmcraid_isr_msix(int irq
, void *dev_id
)
4335 struct pmcraid_isr_param
*hrrq_vector
;
4336 struct pmcraid_instance
*pinstance
;
4337 unsigned long lock_flags
;
4341 hrrq_vector
= (struct pmcraid_isr_param
*)dev_id
;
4342 hrrq_id
= hrrq_vector
->hrrq_id
;
4343 pinstance
= hrrq_vector
->drv_inst
;
4346 /* Read the interrupt */
4347 intrs_val
= pmcraid_read_interrupts(pinstance
);
4349 ((ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
)
4350 & DOORBELL_INTR_MSIX_CLR
) == 0)) {
4351 /* Any error interrupts including unit_check,
4352 * initiate IOA reset.In case of unit check indicate
4353 * to reset_sequence that IOA unit checked and prepare
4354 * for a dump during reset sequence
4356 if (intrs_val
& PMCRAID_ERROR_INTERRUPTS
) {
4357 if (intrs_val
& INTRS_IOA_UNIT_CHECK
)
4358 pinstance
->ioa_unit_check
= 1;
4360 pmcraid_err("ISR: error interrupts: %x \
4361 initiating reset\n", intrs_val
);
4362 spin_lock_irqsave(pinstance
->host
->host_lock
,
4364 pmcraid_initiate_reset(pinstance
);
4365 spin_unlock_irqrestore(
4366 pinstance
->host
->host_lock
,
4369 /* If interrupt was as part of the ioa initialization,
4370 * clear it. Delete the timer and wakeup the
4371 * reset engine to proceed with reset sequence
4373 if (intrs_val
& INTRS_TRANSITION_TO_OPERATIONAL
)
4374 pmcraid_clr_trans_op(pinstance
);
4376 /* Clear the interrupt register by writing
4377 * to host to ioa doorbell. Once done
4378 * FW will clear the interrupt.
4380 iowrite32(DOORBELL_INTR_MSIX_CLR
,
4381 pinstance
->int_regs
.host_ioa_interrupt_reg
);
4382 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
4388 tasklet_schedule(&(pinstance
->isr_tasklet
[hrrq_id
]));
4394 * pmcraid_isr - implements legacy interrupt handling routine
4396 * @irq: interrupt vector number
4397 * @dev_id: pointer hrrq_vector
4400 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4402 static irqreturn_t
pmcraid_isr(int irq
, void *dev_id
)
4404 struct pmcraid_isr_param
*hrrq_vector
;
4405 struct pmcraid_instance
*pinstance
;
4407 unsigned long lock_flags
;
4410 /* In case of legacy interrupt mode where interrupts are shared across
4411 * isrs, it may be possible that the current interrupt is not from IOA
4414 printk(KERN_INFO
"%s(): NULL host pointer\n", __func__
);
4417 hrrq_vector
= (struct pmcraid_isr_param
*)dev_id
;
4418 pinstance
= hrrq_vector
->drv_inst
;
4420 intrs
= pmcraid_read_interrupts(pinstance
);
4422 if (unlikely((intrs
& PMCRAID_PCI_INTERRUPTS
) == 0))
4425 /* Any error interrupts including unit_check, initiate IOA reset.
4426 * In case of unit check indicate to reset_sequence that IOA unit
4427 * checked and prepare for a dump during reset sequence
4429 if (intrs
& PMCRAID_ERROR_INTERRUPTS
) {
4431 if (intrs
& INTRS_IOA_UNIT_CHECK
)
4432 pinstance
->ioa_unit_check
= 1;
4435 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4436 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4439 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4440 spin_lock_irqsave(pinstance
->host
->host_lock
, lock_flags
);
4441 pmcraid_initiate_reset(pinstance
);
4442 spin_unlock_irqrestore(pinstance
->host
->host_lock
, lock_flags
);
4444 /* If interrupt was as part of the ioa initialization,
4445 * clear. Delete the timer and wakeup the
4446 * reset engine to proceed with reset sequence
4448 if (intrs
& INTRS_TRANSITION_TO_OPERATIONAL
) {
4449 pmcraid_clr_trans_op(pinstance
);
4452 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4454 pinstance
->int_regs
.ioa_host_interrupt_clr_reg
);
4457 &(pinstance
->isr_tasklet
[hrrq_id
]));
4466 * pmcraid_worker_function - worker thread function
4468 * @workp: pointer to struct work queue
4474 static void pmcraid_worker_function(struct work_struct
*workp
)
4476 struct pmcraid_instance
*pinstance
;
4477 struct pmcraid_resource_entry
*res
;
4478 struct pmcraid_resource_entry
*temp
;
4479 struct scsi_device
*sdev
;
4480 unsigned long lock_flags
;
4481 unsigned long host_lock_flags
;
4483 u8 bus
, target
, lun
;
4485 pinstance
= container_of(workp
, struct pmcraid_instance
, worker_q
);
4486 /* add resources only after host is added into system */
4487 if (!atomic_read(&pinstance
->expose_resources
))
4490 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
4492 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
4493 list_for_each_entry_safe(res
, temp
, &pinstance
->used_res_q
, queue
) {
4495 if (res
->change_detected
== RES_CHANGE_DEL
&& res
->scsi_dev
) {
4496 sdev
= res
->scsi_dev
;
4498 /* host_lock must be held before calling
4501 spin_lock_irqsave(pinstance
->host
->host_lock
,
4503 if (!scsi_device_get(sdev
)) {
4504 spin_unlock_irqrestore(
4505 pinstance
->host
->host_lock
,
4507 pmcraid_info("deleting %x from midlayer\n",
4508 res
->cfg_entry
.resource_address
);
4509 list_move_tail(&res
->queue
,
4510 &pinstance
->free_res_q
);
4511 spin_unlock_irqrestore(
4512 &pinstance
->resource_lock
,
4514 scsi_remove_device(sdev
);
4515 scsi_device_put(sdev
);
4516 spin_lock_irqsave(&pinstance
->resource_lock
,
4518 res
->change_detected
= 0;
4520 spin_unlock_irqrestore(
4521 pinstance
->host
->host_lock
,
4527 list_for_each_entry(res
, &pinstance
->used_res_q
, queue
) {
4529 if (res
->change_detected
== RES_CHANGE_ADD
) {
4531 if (!pmcraid_expose_resource(fw_version
,
4535 if (RES_IS_VSET(res
->cfg_entry
)) {
4536 bus
= PMCRAID_VSET_BUS_ID
;
4537 if (fw_version
<= PMCRAID_FW_VERSION_1
)
4538 target
= res
->cfg_entry
.unique_flags1
;
4540 target
= res
->cfg_entry
.array_id
& 0xFF;
4541 lun
= PMCRAID_VSET_LUN_ID
;
4543 bus
= PMCRAID_PHYS_BUS_ID
;
4546 res
->cfg_entry
.resource_address
);
4547 lun
= RES_LUN(res
->cfg_entry
.resource_address
);
4550 res
->change_detected
= 0;
4551 spin_unlock_irqrestore(&pinstance
->resource_lock
,
4553 scsi_add_device(pinstance
->host
, bus
, target
, lun
);
4554 spin_lock_irqsave(&pinstance
->resource_lock
,
4559 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
4563 * pmcraid_tasklet_function - Tasklet function
4565 * @instance: pointer to msix param structure
4570 static void pmcraid_tasklet_function(unsigned long instance
)
4572 struct pmcraid_isr_param
*hrrq_vector
;
4573 struct pmcraid_instance
*pinstance
;
4574 unsigned long hrrq_lock_flags
;
4575 unsigned long pending_lock_flags
;
4576 unsigned long host_lock_flags
;
4577 spinlock_t
*lockp
; /* hrrq buffer lock */
4581 hrrq_vector
= (struct pmcraid_isr_param
*)instance
;
4582 pinstance
= hrrq_vector
->drv_inst
;
4583 id
= hrrq_vector
->hrrq_id
;
4584 lockp
= &(pinstance
->hrrq_lock
[id
]);
4586 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4587 * protected by its own lock. Traversals must be done within this lock
4588 * as there may be multiple tasklets running on multiple CPUs. Note
4589 * that the lock is held just for picking up the response handle and
4590 * manipulating hrrq_curr/toggle_bit values.
4592 spin_lock_irqsave(lockp
, hrrq_lock_flags
);
4594 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4596 while ((resp
& HRRQ_TOGGLE_BIT
) ==
4597 pinstance
->host_toggle_bit
[id
]) {
4599 int cmd_index
= resp
>> 2;
4600 struct pmcraid_cmd
*cmd
= NULL
;
4602 if (pinstance
->hrrq_curr
[id
] < pinstance
->hrrq_end
[id
]) {
4603 pinstance
->hrrq_curr
[id
]++;
4605 pinstance
->hrrq_curr
[id
] = pinstance
->hrrq_start
[id
];
4606 pinstance
->host_toggle_bit
[id
] ^= 1u;
4609 if (cmd_index
>= PMCRAID_MAX_CMD
) {
4610 /* In case of invalid response handle, log message */
4611 pmcraid_err("Invalid response handle %d\n", cmd_index
);
4612 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4616 cmd
= pinstance
->cmd_list
[cmd_index
];
4617 spin_unlock_irqrestore(lockp
, hrrq_lock_flags
);
4619 spin_lock_irqsave(&pinstance
->pending_pool_lock
,
4620 pending_lock_flags
);
4621 list_del(&cmd
->free_list
);
4622 spin_unlock_irqrestore(&pinstance
->pending_pool_lock
,
4623 pending_lock_flags
);
4624 del_timer(&cmd
->timer
);
4625 atomic_dec(&pinstance
->outstanding_cmds
);
4627 if (cmd
->cmd_done
== pmcraid_ioa_reset
) {
4628 spin_lock_irqsave(pinstance
->host
->host_lock
,
4631 spin_unlock_irqrestore(pinstance
->host
->host_lock
,
4633 } else if (cmd
->cmd_done
!= NULL
) {
4636 /* loop over until we are done with all responses */
4637 spin_lock_irqsave(lockp
, hrrq_lock_flags
);
4638 resp
= le32_to_cpu(*(pinstance
->hrrq_curr
[id
]));
4641 spin_unlock_irqrestore(lockp
, hrrq_lock_flags
);
4645 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4646 * @pinstance: pointer to adapter instance structure
4648 * This routine un-registers registered interrupt handler and
4649 * also frees irqs/vectors.
4655 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance
*pinstance
)
4659 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
4660 free_irq(pinstance
->hrrq_vector
[i
].vector
,
4661 &(pinstance
->hrrq_vector
[i
]));
4663 if (pinstance
->interrupt_mode
) {
4664 pci_disable_msix(pinstance
->pdev
);
4665 pinstance
->interrupt_mode
= 0;
4670 * pmcraid_register_interrupt_handler - registers interrupt handler
4671 * @pinstance: pointer to per-adapter instance structure
4674 * 0 on success, non-zero error code otherwise.
4677 pmcraid_register_interrupt_handler(struct pmcraid_instance
*pinstance
)
4680 struct pci_dev
*pdev
= pinstance
->pdev
;
4682 if ((pmcraid_enable_msix
) &&
4683 (pci_find_capability(pdev
, PCI_CAP_ID_MSIX
))) {
4684 int num_hrrq
= PMCRAID_NUM_MSIX_VECTORS
;
4685 struct msix_entry entries
[PMCRAID_NUM_MSIX_VECTORS
];
4687 for (i
= 0; i
< PMCRAID_NUM_MSIX_VECTORS
; i
++)
4688 entries
[i
].entry
= i
;
4690 rc
= pci_enable_msix(pdev
, entries
, num_hrrq
);
4692 goto pmcraid_isr_legacy
;
4694 /* Check how many MSIX vectors are allocated and register
4695 * msi-x handlers for each of them giving appropriate buffer
4699 if (pci_enable_msix(pdev
, entries
, num_hrrq
))
4700 goto pmcraid_isr_legacy
;
4703 for (i
= 0; i
< num_hrrq
; i
++) {
4704 pinstance
->hrrq_vector
[i
].hrrq_id
= i
;
4705 pinstance
->hrrq_vector
[i
].drv_inst
= pinstance
;
4706 pinstance
->hrrq_vector
[i
].vector
= entries
[i
].vector
;
4707 rc
= request_irq(pinstance
->hrrq_vector
[i
].vector
,
4708 pmcraid_isr_msix
, 0,
4709 PMCRAID_DRIVER_NAME
,
4710 &(pinstance
->hrrq_vector
[i
]));
4714 for (j
= 0; j
< i
; j
++)
4715 free_irq(entries
[j
].vector
,
4716 &(pinstance
->hrrq_vector
[j
]));
4717 pci_disable_msix(pdev
);
4718 goto pmcraid_isr_legacy
;
4722 pinstance
->num_hrrq
= num_hrrq
;
4723 pinstance
->interrupt_mode
= 1;
4724 iowrite32(DOORBELL_INTR_MODE_MSIX
,
4725 pinstance
->int_regs
.host_ioa_interrupt_reg
);
4726 ioread32(pinstance
->int_regs
.host_ioa_interrupt_reg
);
4727 goto pmcraid_isr_out
;
4731 /* If MSI-X registration failed fallback to legacy mode, where
4732 * only one hrrq entry will be used
4734 pinstance
->hrrq_vector
[0].hrrq_id
= 0;
4735 pinstance
->hrrq_vector
[0].drv_inst
= pinstance
;
4736 pinstance
->hrrq_vector
[0].vector
= pdev
->irq
;
4737 pinstance
->num_hrrq
= 1;
4740 rc
= request_irq(pdev
->irq
, pmcraid_isr
, IRQF_SHARED
,
4741 PMCRAID_DRIVER_NAME
, &pinstance
->hrrq_vector
[0]);
4747 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4748 * @pinstance: per adapter instance structure pointer
4749 * @max_index: number of buffer blocks to release
4755 pmcraid_release_cmd_blocks(struct pmcraid_instance
*pinstance
, int max_index
)
4758 for (i
= 0; i
< max_index
; i
++) {
4759 kmem_cache_free(pinstance
->cmd_cachep
, pinstance
->cmd_list
[i
]);
4760 pinstance
->cmd_list
[i
] = NULL
;
4762 kmem_cache_destroy(pinstance
->cmd_cachep
);
4763 pinstance
->cmd_cachep
= NULL
;
4767 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4768 * @pinstance: pointer to per adapter instance structure
4769 * @max_index: number of buffers (from 0 onwards) to release
4771 * This function assumes that the command blocks for which control blocks are
4772 * linked are not released.
4778 pmcraid_release_control_blocks(
4779 struct pmcraid_instance
*pinstance
,
4785 if (pinstance
->control_pool
== NULL
)
4788 for (i
= 0; i
< max_index
; i
++) {
4789 pci_pool_free(pinstance
->control_pool
,
4790 pinstance
->cmd_list
[i
]->ioa_cb
,
4791 pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
);
4792 pinstance
->cmd_list
[i
]->ioa_cb
= NULL
;
4793 pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
= 0;
4795 pci_pool_destroy(pinstance
->control_pool
);
4796 pinstance
->control_pool
= NULL
;
4800 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4801 * @pinstance - pointer to per adapter instance structure
4803 * Allocates memory for command blocks using kernel slab allocator.
4806 * 0 in case of success; -ENOMEM in case of failure
4808 static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance
*pinstance
)
4812 sprintf(pinstance
->cmd_pool_name
, "pmcraid_cmd_pool_%d",
4813 pinstance
->host
->unique_id
);
4816 pinstance
->cmd_cachep
= kmem_cache_create(
4817 pinstance
->cmd_pool_name
,
4818 sizeof(struct pmcraid_cmd
), 0,
4819 SLAB_HWCACHE_ALIGN
, NULL
);
4820 if (!pinstance
->cmd_cachep
)
4823 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
4824 pinstance
->cmd_list
[i
] =
4825 kmem_cache_alloc(pinstance
->cmd_cachep
, GFP_KERNEL
);
4826 if (!pinstance
->cmd_list
[i
]) {
4827 pmcraid_release_cmd_blocks(pinstance
, i
);
4835 * pmcraid_allocate_control_blocks - allocates memory control blocks
4836 * @pinstance : pointer to per adapter instance structure
4838 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4839 * and IOASAs. This is called after command blocks are already allocated.
4842 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4844 static int pmcraid_allocate_control_blocks(struct pmcraid_instance
*pinstance
)
4848 sprintf(pinstance
->ctl_pool_name
, "pmcraid_control_pool_%d",
4849 pinstance
->host
->unique_id
);
4851 pinstance
->control_pool
=
4852 pci_pool_create(pinstance
->ctl_pool_name
,
4854 sizeof(struct pmcraid_control_block
),
4855 PMCRAID_IOARCB_ALIGNMENT
, 0);
4857 if (!pinstance
->control_pool
)
4860 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
4861 pinstance
->cmd_list
[i
]->ioa_cb
=
4863 pinstance
->control_pool
,
4865 &(pinstance
->cmd_list
[i
]->ioa_cb_bus_addr
));
4867 if (!pinstance
->cmd_list
[i
]->ioa_cb
) {
4868 pmcraid_release_control_blocks(pinstance
, i
);
4871 memset(pinstance
->cmd_list
[i
]->ioa_cb
, 0,
4872 sizeof(struct pmcraid_control_block
));
4878 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4879 * @pinstance: pointer to per adapter instance structure
4880 * @maxindex: size of hrrq buffer pointer array
4886 pmcraid_release_host_rrqs(struct pmcraid_instance
*pinstance
, int maxindex
)
4889 for (i
= 0; i
< maxindex
; i
++) {
4891 pci_free_consistent(pinstance
->pdev
,
4892 HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
,
4893 pinstance
->hrrq_start
[i
],
4894 pinstance
->hrrq_start_bus_addr
[i
]);
4896 /* reset pointers and toggle bit to zeros */
4897 pinstance
->hrrq_start
[i
] = NULL
;
4898 pinstance
->hrrq_start_bus_addr
[i
] = 0;
4899 pinstance
->host_toggle_bit
[i
] = 0;
4904 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4905 * @pinstance: pointer to per adapter instance structure
4908 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4910 static int pmcraid_allocate_host_rrqs(struct pmcraid_instance
*pinstance
)
4914 buffer_size
= HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
;
4916 for (i
= 0; i
< pinstance
->num_hrrq
; i
++) {
4917 pinstance
->hrrq_start
[i
] =
4918 pci_alloc_consistent(
4921 &(pinstance
->hrrq_start_bus_addr
[i
]));
4923 if (pinstance
->hrrq_start
[i
] == 0) {
4924 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4926 pmcraid_release_host_rrqs(pinstance
, i
);
4930 memset(pinstance
->hrrq_start
[i
], 0, buffer_size
);
4931 pinstance
->hrrq_curr
[i
] = pinstance
->hrrq_start
[i
];
4932 pinstance
->hrrq_end
[i
] =
4933 pinstance
->hrrq_start
[i
] + PMCRAID_MAX_CMD
- 1;
4934 pinstance
->host_toggle_bit
[i
] = 1;
4935 spin_lock_init(&pinstance
->hrrq_lock
[i
]);
4941 * pmcraid_release_hcams - release HCAM buffers
4943 * @pinstance: pointer to per adapter instance structure
4948 static void pmcraid_release_hcams(struct pmcraid_instance
*pinstance
)
4950 if (pinstance
->ccn
.msg
!= NULL
) {
4951 pci_free_consistent(pinstance
->pdev
,
4952 PMCRAID_AEN_HDR_SIZE
+
4953 sizeof(struct pmcraid_hcam_ccn_ext
),
4955 pinstance
->ccn
.baddr
);
4957 pinstance
->ccn
.msg
= NULL
;
4958 pinstance
->ccn
.hcam
= NULL
;
4959 pinstance
->ccn
.baddr
= 0;
4962 if (pinstance
->ldn
.msg
!= NULL
) {
4963 pci_free_consistent(pinstance
->pdev
,
4964 PMCRAID_AEN_HDR_SIZE
+
4965 sizeof(struct pmcraid_hcam_ldn
),
4967 pinstance
->ldn
.baddr
);
4969 pinstance
->ldn
.msg
= NULL
;
4970 pinstance
->ldn
.hcam
= NULL
;
4971 pinstance
->ldn
.baddr
= 0;
4976 * pmcraid_allocate_hcams - allocates HCAM buffers
4977 * @pinstance : pointer to per adapter instance structure
4980 * 0 in case of successful allocation, non-zero otherwise
4982 static int pmcraid_allocate_hcams(struct pmcraid_instance
*pinstance
)
4984 pinstance
->ccn
.msg
= pci_alloc_consistent(
4986 PMCRAID_AEN_HDR_SIZE
+
4987 sizeof(struct pmcraid_hcam_ccn_ext
),
4988 &(pinstance
->ccn
.baddr
));
4990 pinstance
->ldn
.msg
= pci_alloc_consistent(
4992 PMCRAID_AEN_HDR_SIZE
+
4993 sizeof(struct pmcraid_hcam_ldn
),
4994 &(pinstance
->ldn
.baddr
));
4996 if (pinstance
->ldn
.msg
== NULL
|| pinstance
->ccn
.msg
== NULL
) {
4997 pmcraid_release_hcams(pinstance
);
4999 pinstance
->ccn
.hcam
=
5000 (void *)pinstance
->ccn
.msg
+ PMCRAID_AEN_HDR_SIZE
;
5001 pinstance
->ldn
.hcam
=
5002 (void *)pinstance
->ldn
.msg
+ PMCRAID_AEN_HDR_SIZE
;
5004 atomic_set(&pinstance
->ccn
.ignore
, 0);
5005 atomic_set(&pinstance
->ldn
.ignore
, 0);
5008 return (pinstance
->ldn
.msg
== NULL
) ? -ENOMEM
: 0;
5012 * pmcraid_release_config_buffers - release config.table buffers
5013 * @pinstance: pointer to per adapter instance structure
5018 static void pmcraid_release_config_buffers(struct pmcraid_instance
*pinstance
)
5020 if (pinstance
->cfg_table
!= NULL
&&
5021 pinstance
->cfg_table_bus_addr
!= 0) {
5022 pci_free_consistent(pinstance
->pdev
,
5023 sizeof(struct pmcraid_config_table
),
5024 pinstance
->cfg_table
,
5025 pinstance
->cfg_table_bus_addr
);
5026 pinstance
->cfg_table
= NULL
;
5027 pinstance
->cfg_table_bus_addr
= 0;
5030 if (pinstance
->res_entries
!= NULL
) {
5033 for (i
= 0; i
< PMCRAID_MAX_RESOURCES
; i
++)
5034 list_del(&pinstance
->res_entries
[i
].queue
);
5035 kfree(pinstance
->res_entries
);
5036 pinstance
->res_entries
= NULL
;
5039 pmcraid_release_hcams(pinstance
);
5043 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5044 * @pinstance : pointer to per adapter instance structure
5047 * 0 for successful allocation, -ENOMEM for any failure
5049 static int pmcraid_allocate_config_buffers(struct pmcraid_instance
*pinstance
)
5053 pinstance
->res_entries
=
5054 kzalloc(sizeof(struct pmcraid_resource_entry
) *
5055 PMCRAID_MAX_RESOURCES
, GFP_KERNEL
);
5057 if (NULL
== pinstance
->res_entries
) {
5058 pmcraid_err("failed to allocate memory for resource table\n");
5062 for (i
= 0; i
< PMCRAID_MAX_RESOURCES
; i
++)
5063 list_add_tail(&pinstance
->res_entries
[i
].queue
,
5064 &pinstance
->free_res_q
);
5066 pinstance
->cfg_table
=
5067 pci_alloc_consistent(pinstance
->pdev
,
5068 sizeof(struct pmcraid_config_table
),
5069 &pinstance
->cfg_table_bus_addr
);
5071 if (NULL
== pinstance
->cfg_table
) {
5072 pmcraid_err("couldn't alloc DMA memory for config table\n");
5073 pmcraid_release_config_buffers(pinstance
);
5077 if (pmcraid_allocate_hcams(pinstance
)) {
5078 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5079 pmcraid_release_config_buffers(pinstance
);
5087 * pmcraid_init_tasklets - registers tasklets for response handling
5089 * @pinstance: pointer adapter instance structure
5094 static void pmcraid_init_tasklets(struct pmcraid_instance
*pinstance
)
5097 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
5098 tasklet_init(&pinstance
->isr_tasklet
[i
],
5099 pmcraid_tasklet_function
,
5100 (unsigned long)&pinstance
->hrrq_vector
[i
]);
5104 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5106 * @pinstance: pointer to adapter instance structure
5111 static void pmcraid_kill_tasklets(struct pmcraid_instance
*pinstance
)
5114 for (i
= 0; i
< pinstance
->num_hrrq
; i
++)
5115 tasklet_kill(&pinstance
->isr_tasklet
[i
]);
5119 * pmcraid_release_buffers - release per-adapter buffers allocated
5121 * @pinstance: pointer to adapter soft state
5126 static void pmcraid_release_buffers(struct pmcraid_instance
*pinstance
)
5128 pmcraid_release_config_buffers(pinstance
);
5129 pmcraid_release_control_blocks(pinstance
, PMCRAID_MAX_CMD
);
5130 pmcraid_release_cmd_blocks(pinstance
, PMCRAID_MAX_CMD
);
5131 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5133 if (pinstance
->inq_data
!= NULL
) {
5134 pci_free_consistent(pinstance
->pdev
,
5135 sizeof(struct pmcraid_inquiry_data
),
5136 pinstance
->inq_data
,
5137 pinstance
->inq_data_baddr
);
5139 pinstance
->inq_data
= NULL
;
5140 pinstance
->inq_data_baddr
= 0;
5143 if (pinstance
->timestamp_data
!= NULL
) {
5144 pci_free_consistent(pinstance
->pdev
,
5145 sizeof(struct pmcraid_timestamp_data
),
5146 pinstance
->timestamp_data
,
5147 pinstance
->timestamp_data_baddr
);
5149 pinstance
->timestamp_data
= NULL
;
5150 pinstance
->timestamp_data_baddr
= 0;
5155 * pmcraid_init_buffers - allocates memory and initializes various structures
5156 * @pinstance: pointer to per adapter instance structure
5158 * This routine pre-allocates memory based on the type of block as below:
5159 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5160 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5161 * config-table entries : DMAable memory using pci_alloc_consistent
5162 * HostRRQs : DMAable memory, using pci_alloc_consistent
5165 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5167 static int pmcraid_init_buffers(struct pmcraid_instance
*pinstance
)
5171 if (pmcraid_allocate_host_rrqs(pinstance
)) {
5172 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5173 pinstance
->num_hrrq
);
5177 if (pmcraid_allocate_config_buffers(pinstance
)) {
5178 pmcraid_err("couldn't allocate memory for config buffers\n");
5179 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5183 if (pmcraid_allocate_cmd_blocks(pinstance
)) {
5184 pmcraid_err("couldn't allocate memory for cmd blocks\n");
5185 pmcraid_release_config_buffers(pinstance
);
5186 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5190 if (pmcraid_allocate_control_blocks(pinstance
)) {
5191 pmcraid_err("couldn't allocate memory control blocks\n");
5192 pmcraid_release_config_buffers(pinstance
);
5193 pmcraid_release_cmd_blocks(pinstance
, PMCRAID_MAX_CMD
);
5194 pmcraid_release_host_rrqs(pinstance
, pinstance
->num_hrrq
);
5198 /* allocate DMAable memory for page D0 INQUIRY buffer */
5199 pinstance
->inq_data
= pci_alloc_consistent(
5201 sizeof(struct pmcraid_inquiry_data
),
5202 &pinstance
->inq_data_baddr
);
5204 if (pinstance
->inq_data
== NULL
) {
5205 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5206 pmcraid_release_buffers(pinstance
);
5210 /* allocate DMAable memory for set timestamp data buffer */
5211 pinstance
->timestamp_data
= pci_alloc_consistent(
5213 sizeof(struct pmcraid_timestamp_data
),
5214 &pinstance
->timestamp_data_baddr
);
5216 if (pinstance
->timestamp_data
== NULL
) {
5217 pmcraid_err("couldn't allocate DMA memory for \
5218 set time_stamp \n");
5219 pmcraid_release_buffers(pinstance
);
5224 /* Initialize all the command blocks and add them to free pool. No
5225 * need to lock (free_pool_lock) as this is done in initialization
5228 for (i
= 0; i
< PMCRAID_MAX_CMD
; i
++) {
5229 struct pmcraid_cmd
*cmdp
= pinstance
->cmd_list
[i
];
5230 pmcraid_init_cmdblk(cmdp
, i
);
5231 cmdp
->drv_inst
= pinstance
;
5232 list_add_tail(&cmdp
->free_list
, &pinstance
->free_cmd_pool
);
5239 * pmcraid_reinit_buffers - resets various buffer pointers
5240 * @pinstance: pointer to adapter instance
5244 static void pmcraid_reinit_buffers(struct pmcraid_instance
*pinstance
)
5247 int buffer_size
= HRRQ_ENTRY_SIZE
* PMCRAID_MAX_CMD
;
5249 for (i
= 0; i
< pinstance
->num_hrrq
; i
++) {
5250 memset(pinstance
->hrrq_start
[i
], 0, buffer_size
);
5251 pinstance
->hrrq_curr
[i
] = pinstance
->hrrq_start
[i
];
5252 pinstance
->hrrq_end
[i
] =
5253 pinstance
->hrrq_start
[i
] + PMCRAID_MAX_CMD
- 1;
5254 pinstance
->host_toggle_bit
[i
] = 1;
5259 * pmcraid_init_instance - initialize per instance data structure
5260 * @pdev: pointer to pci device structure
5261 * @host: pointer to Scsi_Host structure
5262 * @mapped_pci_addr: memory mapped IOA configuration registers
5265 * 0 on success, non-zero in case of any failure
5267 static int pmcraid_init_instance(struct pci_dev
*pdev
, struct Scsi_Host
*host
,
5268 void __iomem
*mapped_pci_addr
)
5270 struct pmcraid_instance
*pinstance
=
5271 (struct pmcraid_instance
*)host
->hostdata
;
5273 pinstance
->host
= host
;
5274 pinstance
->pdev
= pdev
;
5276 /* Initialize register addresses */
5277 pinstance
->mapped_dma_addr
= mapped_pci_addr
;
5279 /* Initialize chip-specific details */
5281 struct pmcraid_chip_details
*chip_cfg
= pinstance
->chip_cfg
;
5282 struct pmcraid_interrupts
*pint_regs
= &pinstance
->int_regs
;
5284 pinstance
->ioarrin
= mapped_pci_addr
+ chip_cfg
->ioarrin
;
5286 pint_regs
->ioa_host_interrupt_reg
=
5287 mapped_pci_addr
+ chip_cfg
->ioa_host_intr
;
5288 pint_regs
->ioa_host_interrupt_clr_reg
=
5289 mapped_pci_addr
+ chip_cfg
->ioa_host_intr_clr
;
5290 pint_regs
->ioa_host_msix_interrupt_reg
=
5291 mapped_pci_addr
+ chip_cfg
->ioa_host_msix_intr
;
5292 pint_regs
->host_ioa_interrupt_reg
=
5293 mapped_pci_addr
+ chip_cfg
->host_ioa_intr
;
5294 pint_regs
->host_ioa_interrupt_clr_reg
=
5295 mapped_pci_addr
+ chip_cfg
->host_ioa_intr_clr
;
5297 /* Current version of firmware exposes interrupt mask set
5298 * and mask clr registers through memory mapped bar0.
5300 pinstance
->mailbox
= mapped_pci_addr
+ chip_cfg
->mailbox
;
5301 pinstance
->ioa_status
= mapped_pci_addr
+ chip_cfg
->ioastatus
;
5302 pint_regs
->ioa_host_interrupt_mask_reg
=
5303 mapped_pci_addr
+ chip_cfg
->ioa_host_mask
;
5304 pint_regs
->ioa_host_interrupt_mask_clr_reg
=
5305 mapped_pci_addr
+ chip_cfg
->ioa_host_mask_clr
;
5306 pint_regs
->global_interrupt_mask_reg
=
5307 mapped_pci_addr
+ chip_cfg
->global_intr_mask
;
5310 pinstance
->ioa_reset_attempts
= 0;
5311 init_waitqueue_head(&pinstance
->reset_wait_q
);
5313 atomic_set(&pinstance
->outstanding_cmds
, 0);
5314 atomic_set(&pinstance
->last_message_id
, 0);
5315 atomic_set(&pinstance
->expose_resources
, 0);
5317 INIT_LIST_HEAD(&pinstance
->free_res_q
);
5318 INIT_LIST_HEAD(&pinstance
->used_res_q
);
5319 INIT_LIST_HEAD(&pinstance
->free_cmd_pool
);
5320 INIT_LIST_HEAD(&pinstance
->pending_cmd_pool
);
5322 spin_lock_init(&pinstance
->free_pool_lock
);
5323 spin_lock_init(&pinstance
->pending_pool_lock
);
5324 spin_lock_init(&pinstance
->resource_lock
);
5325 mutex_init(&pinstance
->aen_queue_lock
);
5327 /* Work-queue (Shared) for deferred processing error handling */
5328 INIT_WORK(&pinstance
->worker_q
, pmcraid_worker_function
);
5330 /* Initialize the default log_level */
5331 pinstance
->current_log_level
= pmcraid_log_level
;
5333 /* Setup variables required for reset engine */
5334 pinstance
->ioa_state
= IOA_STATE_UNKNOWN
;
5335 pinstance
->reset_cmd
= NULL
;
5340 * pmcraid_shutdown - shutdown adapter controller.
5341 * @pdev: pci device struct
5343 * Issues an adapter shutdown to the card waits for its completion
5348 static void pmcraid_shutdown(struct pci_dev
*pdev
)
5350 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5351 pmcraid_reset_bringdown(pinstance
);
5356 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5358 static unsigned short pmcraid_get_minor(void)
5362 minor
= find_first_zero_bit(pmcraid_minor
, sizeof(pmcraid_minor
));
5363 __set_bit(minor
, pmcraid_minor
);
5368 * pmcraid_release_minor - releases given minor back to minor number bitmap
5370 static void pmcraid_release_minor(unsigned short minor
)
5372 __clear_bit(minor
, pmcraid_minor
);
5376 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5378 * @pinstance: pointer to adapter instance for which to register device
5381 * 0 in case of success, otherwise non-zero
5383 static int pmcraid_setup_chrdev(struct pmcraid_instance
*pinstance
)
5388 minor
= pmcraid_get_minor();
5389 cdev_init(&pinstance
->cdev
, &pmcraid_fops
);
5390 pinstance
->cdev
.owner
= THIS_MODULE
;
5392 error
= cdev_add(&pinstance
->cdev
, MKDEV(pmcraid_major
, minor
), 1);
5395 pmcraid_release_minor(minor
);
5397 device_create(pmcraid_class
, NULL
, MKDEV(pmcraid_major
, minor
),
5398 NULL
, "%s%u", PMCRAID_DEVFILE
, minor
);
5403 * pmcraid_release_chrdev - unregisters per-adapter management interface
5405 * @pinstance: pointer to adapter instance structure
5410 static void pmcraid_release_chrdev(struct pmcraid_instance
*pinstance
)
5412 pmcraid_release_minor(MINOR(pinstance
->cdev
.dev
));
5413 device_destroy(pmcraid_class
,
5414 MKDEV(pmcraid_major
, MINOR(pinstance
->cdev
.dev
)));
5415 cdev_del(&pinstance
->cdev
);
5419 * pmcraid_remove - IOA hot plug remove entry point
5420 * @pdev: pci device struct
5425 static void pmcraid_remove(struct pci_dev
*pdev
)
5427 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5429 /* remove the management interface (/dev file) for this device */
5430 pmcraid_release_chrdev(pinstance
);
5432 /* remove host template from scsi midlayer */
5433 scsi_remove_host(pinstance
->host
);
5435 /* block requests from mid-layer */
5436 scsi_block_requests(pinstance
->host
);
5438 /* initiate shutdown adapter */
5439 pmcraid_shutdown(pdev
);
5441 pmcraid_disable_interrupts(pinstance
, ~0);
5442 flush_work(&pinstance
->worker_q
);
5444 pmcraid_kill_tasklets(pinstance
);
5445 pmcraid_unregister_interrupt_handler(pinstance
);
5446 pmcraid_release_buffers(pinstance
);
5447 iounmap(pinstance
->mapped_dma_addr
);
5448 pci_release_regions(pdev
);
5449 scsi_host_put(pinstance
->host
);
5450 pci_disable_device(pdev
);
5457 * pmcraid_suspend - driver suspend entry point for power management
5458 * @pdev: PCI device structure
5459 * @state: PCI power state to suspend routine
5461 * Return Value - 0 always
5463 static int pmcraid_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5465 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5467 pmcraid_shutdown(pdev
);
5468 pmcraid_disable_interrupts(pinstance
, ~0);
5469 pmcraid_kill_tasklets(pinstance
);
5470 pci_set_drvdata(pinstance
->pdev
, pinstance
);
5471 pmcraid_unregister_interrupt_handler(pinstance
);
5472 pci_save_state(pdev
);
5473 pci_disable_device(pdev
);
5474 pci_set_power_state(pdev
, pci_choose_state(pdev
, state
));
5480 * pmcraid_resume - driver resume entry point PCI power management
5481 * @pdev: PCI device structure
5483 * Return Value - 0 in case of success. Error code in case of any failure
5485 static int pmcraid_resume(struct pci_dev
*pdev
)
5487 struct pmcraid_instance
*pinstance
= pci_get_drvdata(pdev
);
5488 struct Scsi_Host
*host
= pinstance
->host
;
5491 pci_set_power_state(pdev
, PCI_D0
);
5492 pci_enable_wake(pdev
, PCI_D0
, 0);
5493 pci_restore_state(pdev
);
5495 rc
= pci_enable_device(pdev
);
5498 dev_err(&pdev
->dev
, "resume: Enable device failed\n");
5502 pci_set_master(pdev
);
5504 if ((sizeof(dma_addr_t
) == 4) ||
5505 pci_set_dma_mask(pdev
, DMA_BIT_MASK(64)))
5506 rc
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
5509 rc
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
5512 dev_err(&pdev
->dev
, "resume: Failed to set PCI DMA mask\n");
5513 goto disable_device
;
5516 pmcraid_disable_interrupts(pinstance
, ~0);
5517 atomic_set(&pinstance
->outstanding_cmds
, 0);
5518 rc
= pmcraid_register_interrupt_handler(pinstance
);
5522 "resume: couldn't register interrupt handlers\n");
5527 pmcraid_init_tasklets(pinstance
);
5528 pmcraid_enable_interrupts(pinstance
, PMCRAID_PCI_INTERRUPTS
);
5530 /* Start with hard reset sequence which brings up IOA to operational
5531 * state as well as completes the reset sequence.
5533 pinstance
->ioa_hard_reset
= 1;
5535 /* Start IOA firmware initialization and bring card to Operational
5538 if (pmcraid_reset_bringup(pinstance
)) {
5539 dev_err(&pdev
->dev
, "couldn't initialize IOA\n");
5541 goto release_tasklets
;
5547 pmcraid_disable_interrupts(pinstance
, ~0);
5548 pmcraid_kill_tasklets(pinstance
);
5549 pmcraid_unregister_interrupt_handler(pinstance
);
5552 scsi_host_put(host
);
5555 pci_disable_device(pdev
);
5562 #define pmcraid_suspend NULL
5563 #define pmcraid_resume NULL
5565 #endif /* CONFIG_PM */
5568 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5569 * completion of the ioa reset
5570 * @cmd: pointer to reset command block
5572 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd
*cmd
)
5574 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5575 unsigned long flags
;
5577 spin_lock_irqsave(pinstance
->host
->host_lock
, flags
);
5578 pmcraid_ioa_reset(cmd
);
5579 spin_unlock_irqrestore(pinstance
->host
->host_lock
, flags
);
5580 scsi_unblock_requests(pinstance
->host
);
5581 schedule_work(&pinstance
->worker_q
);
5585 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5587 * @cmd: pointer to pmcraid_cmd structure
5590 * 0 for success or non-zero for failure cases
5592 static void pmcraid_set_supported_devs(struct pmcraid_cmd
*cmd
)
5594 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5595 void (*cmd_done
) (struct pmcraid_cmd
*) = pmcraid_complete_ioa_reset
;
5597 pmcraid_reinit_cmdblk(cmd
);
5599 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5600 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
5601 ioarcb
->cdb
[0] = PMCRAID_SET_SUPPORTED_DEVICES
;
5602 ioarcb
->cdb
[1] = ALL_DEVICES_SUPPORTED
;
5604 /* If this was called as part of resource table reinitialization due to
5605 * lost CCN, it is enough to return the command block back to free pool
5606 * as part of set_supported_devs completion function.
5608 if (cmd
->drv_inst
->reinit_cfg_table
) {
5609 cmd
->drv_inst
->reinit_cfg_table
= 0;
5611 cmd_done
= pmcraid_reinit_cfgtable_done
;
5614 /* we will be done with the reset sequence after set supported devices,
5615 * setup the done function to return the command block back to free
5618 pmcraid_send_cmd(cmd
,
5620 PMCRAID_SET_SUP_DEV_TIMEOUT
,
5621 pmcraid_timeout_handler
);
5626 * pmcraid_set_timestamp - set the timestamp to IOAFP
5628 * @cmd: pointer to pmcraid_cmd structure
5631 * 0 for success or non-zero for failure cases
5633 static void pmcraid_set_timestamp(struct pmcraid_cmd
*cmd
)
5635 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5636 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5637 __be32 time_stamp_len
= cpu_to_be32(PMCRAID_TIMESTAMP_LEN
);
5638 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
5643 do_gettimeofday(&tv
);
5644 timestamp
= tv
.tv_sec
* 1000;
5646 pinstance
->timestamp_data
->timestamp
[0] = (__u8
)(timestamp
);
5647 pinstance
->timestamp_data
->timestamp
[1] = (__u8
)((timestamp
) >> 8);
5648 pinstance
->timestamp_data
->timestamp
[2] = (__u8
)((timestamp
) >> 16);
5649 pinstance
->timestamp_data
->timestamp
[3] = (__u8
)((timestamp
) >> 24);
5650 pinstance
->timestamp_data
->timestamp
[4] = (__u8
)((timestamp
) >> 32);
5651 pinstance
->timestamp_data
->timestamp
[5] = (__u8
)((timestamp
) >> 40);
5653 pmcraid_reinit_cmdblk(cmd
);
5654 ioarcb
->request_type
= REQ_TYPE_SCSI
;
5655 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5656 ioarcb
->cdb
[0] = PMCRAID_SCSI_SET_TIMESTAMP
;
5657 ioarcb
->cdb
[1] = PMCRAID_SCSI_SERVICE_ACTION
;
5658 memcpy(&(ioarcb
->cdb
[6]), &time_stamp_len
, sizeof(time_stamp_len
));
5660 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
5661 offsetof(struct pmcraid_ioarcb
,
5662 add_data
.u
.ioadl
[0]));
5663 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
5664 ioarcb
->ioarcb_bus_addr
&= ~(0x1FULL
);
5666 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
5667 ioarcb
->request_flags0
|= TRANSFER_DIR_WRITE
;
5668 ioarcb
->data_transfer_length
=
5669 cpu_to_le32(sizeof(struct pmcraid_timestamp_data
));
5670 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
5671 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
5672 ioadl
->address
= cpu_to_le64(pinstance
->timestamp_data_baddr
);
5673 ioadl
->data_len
= cpu_to_le32(sizeof(struct pmcraid_timestamp_data
));
5675 if (!pinstance
->timestamp_error
) {
5676 pinstance
->timestamp_error
= 0;
5677 pmcraid_send_cmd(cmd
, pmcraid_set_supported_devs
,
5678 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5680 pmcraid_send_cmd(cmd
, pmcraid_return_cmd
,
5681 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5688 * pmcraid_init_res_table - Initialize the resource table
5689 * @cmd: pointer to pmcraid command struct
5691 * This function looks through the existing resource table, comparing
5692 * it with the config table. This function will take care of old/new
5693 * devices and schedule adding/removing them from the mid-layer
5699 static void pmcraid_init_res_table(struct pmcraid_cmd
*cmd
)
5701 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5702 struct pmcraid_resource_entry
*res
, *temp
;
5703 struct pmcraid_config_table_entry
*cfgte
;
5704 unsigned long lock_flags
;
5709 if (pinstance
->cfg_table
->flags
& MICROCODE_UPDATE_REQUIRED
)
5710 pmcraid_err("IOA requires microcode download\n");
5712 fw_version
= be16_to_cpu(pinstance
->inq_data
->fw_version
);
5714 /* resource list is protected by pinstance->resource_lock.
5715 * init_res_table can be called from probe (user-thread) or runtime
5716 * reset (timer/tasklet)
5718 spin_lock_irqsave(&pinstance
->resource_lock
, lock_flags
);
5720 list_for_each_entry_safe(res
, temp
, &pinstance
->used_res_q
, queue
)
5721 list_move_tail(&res
->queue
, &old_res
);
5723 for (i
= 0; i
< pinstance
->cfg_table
->num_entries
; i
++) {
5724 if (be16_to_cpu(pinstance
->inq_data
->fw_version
) <=
5725 PMCRAID_FW_VERSION_1
)
5726 cfgte
= &pinstance
->cfg_table
->entries
[i
];
5728 cfgte
= (struct pmcraid_config_table_entry
*)
5729 &pinstance
->cfg_table
->entries_ext
[i
];
5731 if (!pmcraid_expose_resource(fw_version
, cfgte
))
5736 /* If this entry was already detected and initialized */
5737 list_for_each_entry_safe(res
, temp
, &old_res
, queue
) {
5739 rc
= memcmp(&res
->cfg_entry
.resource_address
,
5740 &cfgte
->resource_address
,
5741 sizeof(cfgte
->resource_address
));
5743 list_move_tail(&res
->queue
,
5744 &pinstance
->used_res_q
);
5750 /* If this is new entry, initialize it and add it the queue */
5753 if (list_empty(&pinstance
->free_res_q
)) {
5754 pmcraid_err("Too many devices attached\n");
5759 res
= list_entry(pinstance
->free_res_q
.next
,
5760 struct pmcraid_resource_entry
, queue
);
5762 res
->scsi_dev
= NULL
;
5763 res
->change_detected
= RES_CHANGE_ADD
;
5764 res
->reset_progress
= 0;
5765 list_move_tail(&res
->queue
, &pinstance
->used_res_q
);
5768 /* copy new configuration table entry details into driver
5769 * maintained resource entry
5772 memcpy(&res
->cfg_entry
, cfgte
,
5773 pinstance
->config_table_entry_size
);
5774 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5775 res
->cfg_entry
.resource_type
,
5776 (fw_version
<= PMCRAID_FW_VERSION_1
?
5777 res
->cfg_entry
.unique_flags1
:
5778 res
->cfg_entry
.array_id
& 0xFF),
5779 le32_to_cpu(res
->cfg_entry
.resource_address
));
5783 /* Detect any deleted entries, mark them for deletion from mid-layer */
5784 list_for_each_entry_safe(res
, temp
, &old_res
, queue
) {
5786 if (res
->scsi_dev
) {
5787 res
->change_detected
= RES_CHANGE_DEL
;
5788 res
->cfg_entry
.resource_handle
=
5789 PMCRAID_INVALID_RES_HANDLE
;
5790 list_move_tail(&res
->queue
, &pinstance
->used_res_q
);
5792 list_move_tail(&res
->queue
, &pinstance
->free_res_q
);
5796 /* release the resource list lock */
5797 spin_unlock_irqrestore(&pinstance
->resource_lock
, lock_flags
);
5798 pmcraid_set_timestamp(cmd
);
5802 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5803 * @cmd: pointer pmcraid_cmd struct
5805 * This function sends a Query IOA Configuration command to the adapter to
5806 * retrieve the IOA configuration table.
5811 static void pmcraid_querycfg(struct pmcraid_cmd
*cmd
)
5813 struct pmcraid_ioarcb
*ioarcb
= &cmd
->ioa_cb
->ioarcb
;
5814 struct pmcraid_ioadl_desc
*ioadl
= ioarcb
->add_data
.u
.ioadl
;
5815 struct pmcraid_instance
*pinstance
= cmd
->drv_inst
;
5816 int cfg_table_size
= cpu_to_be32(sizeof(struct pmcraid_config_table
));
5818 if (be16_to_cpu(pinstance
->inq_data
->fw_version
) <=
5819 PMCRAID_FW_VERSION_1
)
5820 pinstance
->config_table_entry_size
=
5821 sizeof(struct pmcraid_config_table_entry
);
5823 pinstance
->config_table_entry_size
=
5824 sizeof(struct pmcraid_config_table_entry_ext
);
5826 ioarcb
->request_type
= REQ_TYPE_IOACMD
;
5827 ioarcb
->resource_handle
= cpu_to_le32(PMCRAID_IOA_RES_HANDLE
);
5829 ioarcb
->cdb
[0] = PMCRAID_QUERY_IOA_CONFIG
;
5831 /* firmware requires 4-byte length field, specified in B.E format */
5832 memcpy(&(ioarcb
->cdb
[10]), &cfg_table_size
, sizeof(cfg_table_size
));
5834 /* Since entire config table can be described by single IOADL, it can
5835 * be part of IOARCB itself
5837 ioarcb
->ioadl_bus_addr
= cpu_to_le64((cmd
->ioa_cb_bus_addr
) +
5838 offsetof(struct pmcraid_ioarcb
,
5839 add_data
.u
.ioadl
[0]));
5840 ioarcb
->ioadl_length
= cpu_to_le32(sizeof(struct pmcraid_ioadl_desc
));
5841 ioarcb
->ioarcb_bus_addr
&= ~(0x1FULL
);
5843 ioarcb
->request_flags0
|= NO_LINK_DESCS
;
5844 ioarcb
->data_transfer_length
=
5845 cpu_to_le32(sizeof(struct pmcraid_config_table
));
5847 ioadl
= &(ioarcb
->add_data
.u
.ioadl
[0]);
5848 ioadl
->flags
= IOADL_FLAGS_LAST_DESC
;
5849 ioadl
->address
= cpu_to_le64(pinstance
->cfg_table_bus_addr
);
5850 ioadl
->data_len
= cpu_to_le32(sizeof(struct pmcraid_config_table
));
5852 pmcraid_send_cmd(cmd
, pmcraid_init_res_table
,
5853 PMCRAID_INTERNAL_TIMEOUT
, pmcraid_timeout_handler
);
5858 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5859 * @pdev: pointer to pci device structure
5860 * @dev_id: pointer to device ids structure
5863 * returns 0 if the device is claimed and successfully configured.
5864 * returns non-zero error code in case of any failure
5866 static int pmcraid_probe(struct pci_dev
*pdev
,
5867 const struct pci_device_id
*dev_id
)
5869 struct pmcraid_instance
*pinstance
;
5870 struct Scsi_Host
*host
;
5871 void __iomem
*mapped_pci_addr
;
5872 int rc
= PCIBIOS_SUCCESSFUL
;
5874 if (atomic_read(&pmcraid_adapter_count
) >= PMCRAID_MAX_ADAPTERS
) {
5876 ("maximum number(%d) of supported adapters reached\n",
5877 atomic_read(&pmcraid_adapter_count
));
5881 atomic_inc(&pmcraid_adapter_count
);
5882 rc
= pci_enable_device(pdev
);
5885 dev_err(&pdev
->dev
, "Cannot enable adapter\n");
5886 atomic_dec(&pmcraid_adapter_count
);
5890 dev_info(&pdev
->dev
,
5891 "Found new IOA(%x:%x), Total IOA count: %d\n",
5892 pdev
->vendor
, pdev
->device
,
5893 atomic_read(&pmcraid_adapter_count
));
5895 rc
= pci_request_regions(pdev
, PMCRAID_DRIVER_NAME
);
5899 "Couldn't register memory range of registers\n");
5900 goto out_disable_device
;
5903 mapped_pci_addr
= pci_iomap(pdev
, 0, 0);
5905 if (!mapped_pci_addr
) {
5906 dev_err(&pdev
->dev
, "Couldn't map PCI registers memory\n");
5908 goto out_release_regions
;
5911 pci_set_master(pdev
);
5913 /* Firmware requires the system bus address of IOARCB to be within
5914 * 32-bit addressable range though it has 64-bit IOARRIN register.
5915 * However, firmware supports 64-bit streaming DMA buffers, whereas
5916 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5917 * returns memory within 4GB (if not, change this logic), coherent
5918 * buffers are within firmware acceptable address ranges.
5920 if ((sizeof(dma_addr_t
) == 4) ||
5921 pci_set_dma_mask(pdev
, DMA_BIT_MASK(64)))
5922 rc
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
5924 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5925 * bit mask for pci_alloc_consistent to return addresses within 4GB
5928 rc
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(32));
5931 dev_err(&pdev
->dev
, "Failed to set PCI DMA mask\n");
5935 host
= scsi_host_alloc(&pmcraid_host_template
,
5936 sizeof(struct pmcraid_instance
));
5939 dev_err(&pdev
->dev
, "scsi_host_alloc failed!\n");
5944 host
->max_id
= PMCRAID_MAX_NUM_TARGETS_PER_BUS
;
5945 host
->max_lun
= PMCRAID_MAX_NUM_LUNS_PER_TARGET
;
5946 host
->unique_id
= host
->host_no
;
5947 host
->max_channel
= PMCRAID_MAX_BUS_TO_SCAN
;
5948 host
->max_cmd_len
= PMCRAID_MAX_CDB_LEN
;
5950 /* zero out entire instance structure */
5951 pinstance
= (struct pmcraid_instance
*)host
->hostdata
;
5952 memset(pinstance
, 0, sizeof(*pinstance
));
5954 pinstance
->chip_cfg
=
5955 (struct pmcraid_chip_details
*)(dev_id
->driver_data
);
5957 rc
= pmcraid_init_instance(pdev
, host
, mapped_pci_addr
);
5960 dev_err(&pdev
->dev
, "failed to initialize adapter instance\n");
5961 goto out_scsi_host_put
;
5964 pci_set_drvdata(pdev
, pinstance
);
5966 /* Save PCI config-space for use following the reset */
5967 rc
= pci_save_state(pinstance
->pdev
);
5970 dev_err(&pdev
->dev
, "Failed to save PCI config space\n");
5971 goto out_scsi_host_put
;
5974 pmcraid_disable_interrupts(pinstance
, ~0);
5976 rc
= pmcraid_register_interrupt_handler(pinstance
);
5979 dev_err(&pdev
->dev
, "couldn't register interrupt handler\n");
5980 goto out_scsi_host_put
;
5983 pmcraid_init_tasklets(pinstance
);
5985 /* allocate verious buffers used by LLD.*/
5986 rc
= pmcraid_init_buffers(pinstance
);
5989 pmcraid_err("couldn't allocate memory blocks\n");
5990 goto out_unregister_isr
;
5993 /* check the reset type required */
5994 pmcraid_reset_type(pinstance
);
5996 pmcraid_enable_interrupts(pinstance
, PMCRAID_PCI_INTERRUPTS
);
5998 /* Start IOA firmware initialization and bring card to Operational
6001 pmcraid_info("starting IOA initialization sequence\n");
6002 if (pmcraid_reset_bringup(pinstance
)) {
6003 dev_err(&pdev
->dev
, "couldn't initialize IOA\n");
6005 goto out_release_bufs
;
6008 /* Add adapter instance into mid-layer list */
6009 rc
= scsi_add_host(pinstance
->host
, &pdev
->dev
);
6011 pmcraid_err("couldn't add host into mid-layer: %d\n", rc
);
6012 goto out_release_bufs
;
6015 scsi_scan_host(pinstance
->host
);
6017 rc
= pmcraid_setup_chrdev(pinstance
);
6020 pmcraid_err("couldn't create mgmt interface, error: %x\n",
6022 goto out_remove_host
;
6025 /* Schedule worker thread to handle CCN and take care of adding and
6026 * removing devices to OS
6028 atomic_set(&pinstance
->expose_resources
, 1);
6029 schedule_work(&pinstance
->worker_q
);
6033 scsi_remove_host(host
);
6036 pmcraid_release_buffers(pinstance
);
6039 pmcraid_kill_tasklets(pinstance
);
6040 pmcraid_unregister_interrupt_handler(pinstance
);
6043 scsi_host_put(host
);
6046 iounmap(mapped_pci_addr
);
6048 out_release_regions
:
6049 pci_release_regions(pdev
);
6052 atomic_dec(&pmcraid_adapter_count
);
6053 pci_set_drvdata(pdev
, NULL
);
6054 pci_disable_device(pdev
);
6059 * PCI driver structure of pcmraid driver
6061 static struct pci_driver pmcraid_driver
= {
6062 .name
= PMCRAID_DRIVER_NAME
,
6063 .id_table
= pmcraid_pci_table
,
6064 .probe
= pmcraid_probe
,
6065 .remove
= pmcraid_remove
,
6066 .suspend
= pmcraid_suspend
,
6067 .resume
= pmcraid_resume
,
6068 .shutdown
= pmcraid_shutdown
6072 * pmcraid_init - module load entry point
6074 static int __init
pmcraid_init(void)
6079 pmcraid_info("%s Device Driver version: %s\n",
6080 PMCRAID_DRIVER_NAME
, PMCRAID_DRIVER_VERSION
);
6082 error
= alloc_chrdev_region(&dev
, 0,
6083 PMCRAID_MAX_ADAPTERS
,
6087 pmcraid_err("failed to get a major number for adapters\n");
6091 pmcraid_major
= MAJOR(dev
);
6092 pmcraid_class
= class_create(THIS_MODULE
, PMCRAID_DEVFILE
);
6094 if (IS_ERR(pmcraid_class
)) {
6095 error
= PTR_ERR(pmcraid_class
);
6096 pmcraid_err("failed to register with sysfs, error = %x\n",
6098 goto out_unreg_chrdev
;
6101 error
= pmcraid_netlink_init();
6104 goto out_unreg_chrdev
;
6106 error
= pci_register_driver(&pmcraid_driver
);
6111 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6113 class_destroy(pmcraid_class
);
6114 pmcraid_netlink_release();
6117 unregister_chrdev_region(MKDEV(pmcraid_major
, 0), PMCRAID_MAX_ADAPTERS
);
6124 * pmcraid_exit - module unload entry point
6126 static void __exit
pmcraid_exit(void)
6128 pmcraid_netlink_release();
6129 unregister_chrdev_region(MKDEV(pmcraid_major
, 0),
6130 PMCRAID_MAX_ADAPTERS
);
6131 pci_unregister_driver(&pmcraid_driver
);
6132 class_destroy(pmcraid_class
);
6135 module_init(pmcraid_init
);
6136 module_exit(pmcraid_exit
);