1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
5 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
8 * Copyright (C) 2008, 2009 PMC Sierra Inc
11 #include <linux/init.h>
12 #include <linux/types.h>
13 #include <linux/errno.h>
14 #include <linux/kernel.h>
15 #include <linux/ioport.h>
16 #include <linux/delay.h>
17 #include <linux/pci.h>
18 #include <linux/wait.h>
19 #include <linux/spinlock.h>
20 #include <linux/sched.h>
21 #include <linux/interrupt.h>
22 #include <linux/blkdev.h>
23 #include <linux/firmware.h>
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/hdreg.h>
28 #include <linux/slab.h>
30 #include <asm/processor.h>
31 #include <linux/libata.h>
32 #include <linux/mutex.h>
33 #include <linux/ktime.h>
34 #include <scsi/scsi.h>
35 #include <scsi/scsi_host.h>
36 #include <scsi/scsi_device.h>
37 #include <scsi/scsi_tcq.h>
38 #include <scsi/scsi_eh.h>
39 #include <scsi/scsi_cmnd.h>
40 #include <scsi/scsicam.h>
45 * Module configuration parameters
47 static unsigned int pmcraid_debug_log;
48 static unsigned int pmcraid_disable_aen;
49 static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
50 static unsigned int pmcraid_enable_msix;
53 * Data structures to support multiple adapters by the LLD.
54 * pmcraid_adapter_count - count of configured adapters
56 static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
59 * Supporting user-level control interface through IOCTL commands.
60 * pmcraid_major - major number to use
61 * pmcraid_minor - minor number(s) to use
63 static unsigned int pmcraid_major;
64 static struct class *pmcraid_class;
65 static DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
70 MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
71 MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
72 MODULE_LICENSE("GPL");
73 MODULE_VERSION(PMCRAID_DRIVER_VERSION);
75 module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
76 MODULE_PARM_DESC(log_level,
77 "Enables firmware error code logging, default :1 high-severity"
78 " errors, 2: all errors including high-severity errors,"
79 " 0: disables logging");
81 module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
82 MODULE_PARM_DESC(debug,
83 "Enable driver verbose message logging. Set 1 to enable."
86 module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
87 MODULE_PARM_DESC(disable_aen,
88 "Disable driver aen notifications to apps. Set 1 to disable."
91 /* chip specific constants for PMC MaxRAID controllers (same for
94 static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
99 .global_intr_mask = 0x00034,
100 .ioa_host_intr = 0x0009C,
101 .ioa_host_intr_clr = 0x000A0,
102 .ioa_host_msix_intr = 0x7FC40,
103 .ioa_host_mask = 0x7FC28,
104 .ioa_host_mask_clr = 0x7FC28,
105 .host_ioa_intr = 0x00020,
106 .host_ioa_intr_clr = 0x00020,
107 .transop_timeout = 300
112 * PCI device ids supported by pmcraid driver
114 static struct pci_device_id pmcraid_pci_table[] = {
115 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
116 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
121 MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
126 * pmcraid_slave_alloc - Prepare for commands to a device
127 * @scsi_dev: scsi device struct
129 * This function is called by mid-layer prior to sending any command to the new
130 * device. Stores resource entry details of the device in scsi_device struct.
131 * Queuecommand uses the resource handle and other details to fill up IOARCB
132 * while sending commands to the device.
135 * 0 on success / -ENXIO if device does not exist
137 static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
139 struct pmcraid_resource_entry *temp, *res = NULL;
140 struct pmcraid_instance *pinstance;
142 unsigned long lock_flags;
146 pinstance = shost_priv(scsi_dev->host);
148 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
150 /* Driver exposes VSET and GSCSI resources only; all other device types
151 * are not exposed. Resource list is synchronized using resource lock
152 * so any traversal or modifications to the list should be done inside
155 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
156 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
158 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
159 if (RES_IS_VSET(temp->cfg_entry)) {
160 if (fw_version <= PMCRAID_FW_VERSION_1)
161 target = temp->cfg_entry.unique_flags1;
163 target = le16_to_cpu(temp->cfg_entry.array_id) & 0xFF;
165 if (target > PMCRAID_MAX_VSET_TARGETS)
167 bus = PMCRAID_VSET_BUS_ID;
169 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
170 target = RES_TARGET(temp->cfg_entry.resource_address);
171 bus = PMCRAID_PHYS_BUS_ID;
172 lun = RES_LUN(temp->cfg_entry.resource_address);
177 if (bus == scsi_dev->channel &&
178 target == scsi_dev->id &&
179 lun == scsi_dev->lun) {
186 res->scsi_dev = scsi_dev;
187 scsi_dev->hostdata = res;
188 res->change_detected = 0;
189 atomic_set(&res->read_failures, 0);
190 atomic_set(&res->write_failures, 0);
193 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
198 * pmcraid_slave_configure - Configures a SCSI device
199 * @scsi_dev: scsi device struct
201 * This function is executed by SCSI mid layer just after a device is first
202 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
203 * timeout value (default 30s) will be over-written to a higher value (60s)
204 * and max_sectors value will be over-written to 512. It also sets queue depth
205 * to host->cmd_per_lun value
210 static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
212 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
217 /* LLD exposes VSETs and Enclosure devices only */
218 if (RES_IS_GSCSI(res->cfg_entry) &&
219 scsi_dev->type != TYPE_ENCLOSURE)
222 pmcraid_info("configuring %x:%x:%x:%x\n",
223 scsi_dev->host->unique_id,
228 if (RES_IS_GSCSI(res->cfg_entry)) {
229 scsi_dev->allow_restart = 1;
230 } else if (RES_IS_VSET(res->cfg_entry)) {
231 scsi_dev->allow_restart = 1;
232 blk_queue_rq_timeout(scsi_dev->request_queue,
233 PMCRAID_VSET_IO_TIMEOUT);
234 blk_queue_max_hw_sectors(scsi_dev->request_queue,
235 PMCRAID_VSET_MAX_SECTORS);
239 * We never want to report TCQ support for these types of devices.
241 if (!RES_IS_GSCSI(res->cfg_entry) && !RES_IS_VSET(res->cfg_entry))
242 scsi_dev->tagged_supported = 0;
248 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
250 * @scsi_dev: scsi device struct
252 * This is called by mid-layer before removing a device. Pointer assignments
253 * done in pmcraid_slave_alloc will be reset to NULL here.
258 static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
260 struct pmcraid_resource_entry *res;
262 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
265 res->scsi_dev = NULL;
267 scsi_dev->hostdata = NULL;
271 * pmcraid_change_queue_depth - Change the device's queue depth
272 * @scsi_dev: scsi device struct
273 * @depth: depth to set
278 static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth)
280 if (depth > PMCRAID_MAX_CMD_PER_LUN)
281 depth = PMCRAID_MAX_CMD_PER_LUN;
282 return scsi_change_queue_depth(scsi_dev, depth);
286 * pmcraid_init_cmdblk - initializes a command block
288 * @cmd: pointer to struct pmcraid_cmd to be initialized
289 * @index: if >=0 first time initialization; otherwise reinitialization
294 static void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
296 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
297 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
300 /* first time initialization (called from probe) */
302 offsetof(struct pmcraid_control_block, ioasa);
305 ioarcb->response_handle = cpu_to_le32(index << 2);
306 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
307 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
308 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
310 /* re-initialization of various lengths, called once command is
313 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
315 ioarcb->request_flags0 = 0;
316 ioarcb->request_flags1 = 0;
317 ioarcb->cmd_timeout = 0;
318 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~0x1FULL);
319 ioarcb->ioadl_bus_addr = 0;
320 ioarcb->ioadl_length = 0;
321 ioarcb->data_transfer_length = 0;
322 ioarcb->add_cmd_param_length = 0;
323 ioarcb->add_cmd_param_offset = 0;
324 cmd->ioa_cb->ioasa.ioasc = 0;
325 cmd->ioa_cb->ioasa.residual_data_length = 0;
329 cmd->cmd_done = NULL;
330 cmd->scsi_cmd = NULL;
332 cmd->completion_req = 0;
333 cmd->sense_buffer = NULL;
334 cmd->sense_buffer_dma = 0;
336 timer_setup(&cmd->timer, NULL, 0);
340 * pmcraid_reinit_cmdblk - reinitialize a command block
342 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
347 static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
349 pmcraid_init_cmdblk(cmd, -1);
353 * pmcraid_get_free_cmd - get a free cmd block from command block pool
354 * @pinstance: adapter instance structure
357 * returns pointer to cmd block or NULL if no blocks are available
359 static struct pmcraid_cmd *pmcraid_get_free_cmd(
360 struct pmcraid_instance *pinstance
363 struct pmcraid_cmd *cmd = NULL;
364 unsigned long lock_flags;
366 /* free cmd block list is protected by free_pool_lock */
367 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
369 if (!list_empty(&pinstance->free_cmd_pool)) {
370 cmd = list_entry(pinstance->free_cmd_pool.next,
371 struct pmcraid_cmd, free_list);
372 list_del(&cmd->free_list);
374 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
376 /* Initialize the command block before giving it the caller */
378 pmcraid_reinit_cmdblk(cmd);
383 * pmcraid_return_cmd - return a completed command block back into free pool
384 * @cmd: pointer to the command block
389 static void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
391 struct pmcraid_instance *pinstance = cmd->drv_inst;
392 unsigned long lock_flags;
394 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
395 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
396 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
400 * pmcraid_read_interrupts - reads IOA interrupts
402 * @pinstance: pointer to adapter instance structure
405 * interrupts read from IOA
407 static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
409 return (pinstance->interrupt_mode) ?
410 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
411 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
415 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
417 * @pinstance: pointer to per adapter instance structure
418 * @intrs: interrupts to disable
423 static void pmcraid_disable_interrupts(
424 struct pmcraid_instance *pinstance,
428 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
429 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
431 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
432 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
433 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
435 if (!pinstance->interrupt_mode) {
437 pinstance->int_regs.ioa_host_interrupt_mask_reg);
438 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
443 * pmcraid_enable_interrupts - Enables specified interrupts
445 * @pinstance: pointer to per adapter instance structure
446 * @intrs: interrupts to enable
451 static void pmcraid_enable_interrupts(
452 struct pmcraid_instance *pinstance,
455 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
456 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
458 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
460 if (!pinstance->interrupt_mode) {
462 pinstance->int_regs.ioa_host_interrupt_mask_reg);
463 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
466 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
467 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
468 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
472 * pmcraid_clr_trans_op - clear trans to op interrupt
474 * @pinstance: pointer to per adapter instance structure
479 static void pmcraid_clr_trans_op(
480 struct pmcraid_instance *pinstance
483 unsigned long lock_flags;
485 if (!pinstance->interrupt_mode) {
486 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
487 pinstance->int_regs.ioa_host_interrupt_mask_reg);
488 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
489 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
490 pinstance->int_regs.ioa_host_interrupt_clr_reg);
491 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
494 if (pinstance->reset_cmd != NULL) {
495 del_timer(&pinstance->reset_cmd->timer);
497 pinstance->host->host_lock, lock_flags);
498 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
499 spin_unlock_irqrestore(
500 pinstance->host->host_lock, lock_flags);
505 * pmcraid_reset_type - Determine the required reset type
506 * @pinstance: pointer to adapter instance structure
508 * IOA requires hard reset if any of the following conditions is true.
509 * 1. If HRRQ valid interrupt is not masked
510 * 2. IOA reset alert doorbell is set
511 * 3. If there are any error interrupts
513 static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
519 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
520 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
521 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
523 if ((mask & INTRS_HRRQ_VALID) == 0 ||
524 (alerts & DOORBELL_IOA_RESET_ALERT) ||
525 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
526 pmcraid_info("IOA requires hard reset\n");
527 pinstance->ioa_hard_reset = 1;
530 /* If unit check is active, trigger the dump */
531 if (intrs & INTRS_IOA_UNIT_CHECK)
532 pinstance->ioa_unit_check = 1;
535 static void pmcraid_ioa_reset(struct pmcraid_cmd *);
537 * pmcraid_bist_done - completion function for PCI BIST
538 * @t: pointer to reset command
542 static void pmcraid_bist_done(struct timer_list *t)
544 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
545 struct pmcraid_instance *pinstance = cmd->drv_inst;
546 unsigned long lock_flags;
550 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
552 /* If PCI config space can't be accessed wait for another two secs */
553 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
554 cmd->time_left > 0) {
555 pmcraid_info("BIST not complete, waiting another 2 secs\n");
556 cmd->timer.expires = jiffies + cmd->time_left;
558 add_timer(&cmd->timer);
561 pmcraid_info("BIST is complete, proceeding with reset\n");
562 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
563 pmcraid_ioa_reset(cmd);
564 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
569 * pmcraid_start_bist - starts BIST
570 * @cmd: pointer to reset cmd
574 static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
576 struct pmcraid_instance *pinstance = cmd->drv_inst;
577 u32 doorbells, intrs;
579 /* proceed with bist and wait for 2 seconds */
580 iowrite32(DOORBELL_IOA_START_BIST,
581 pinstance->int_regs.host_ioa_interrupt_reg);
582 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
583 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
584 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
587 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
588 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
589 cmd->timer.function = pmcraid_bist_done;
590 add_timer(&cmd->timer);
594 * pmcraid_reset_alert_done - completion routine for reset_alert
595 * @t: pointer to command block used in reset sequence
599 static void pmcraid_reset_alert_done(struct timer_list *t)
601 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
602 struct pmcraid_instance *pinstance = cmd->drv_inst;
603 u32 status = ioread32(pinstance->ioa_status);
604 unsigned long lock_flags;
606 /* if the critical operation in progress bit is set or the wait times
607 * out, invoke reset engine to proceed with hard reset. If there is
608 * some more time to wait, restart the timer
610 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
611 cmd->time_left <= 0) {
612 pmcraid_info("critical op is reset proceeding with reset\n");
613 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
614 pmcraid_ioa_reset(cmd);
615 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
617 pmcraid_info("critical op is not yet reset waiting again\n");
618 /* restart timer if some more time is available to wait */
619 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
620 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
621 cmd->timer.function = pmcraid_reset_alert_done;
622 add_timer(&cmd->timer);
626 static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
628 * pmcraid_reset_alert - alerts IOA for a possible reset
629 * @cmd: command block to be used for reset sequence.
632 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
633 * successfully written to IOA. Returns non-zero in case pci_config_space
636 static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
638 struct pmcraid_instance *pinstance = cmd->drv_inst;
643 /* If we are able to access IOA PCI config space, alert IOA that we are
644 * going to reset it soon. This enables IOA to preserv persistent error
645 * data if any. In case memory space is not accessible, proceed with
648 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
649 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
651 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
652 * reset IOA doesn't generate any interrupts when CRITICAL
653 * OPERATION bit is reset. A timer is started to wait for this
656 cmd->time_left = PMCRAID_RESET_TIMEOUT;
657 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
658 cmd->timer.function = pmcraid_reset_alert_done;
659 add_timer(&cmd->timer);
661 iowrite32(DOORBELL_IOA_RESET_ALERT,
662 pinstance->int_regs.host_ioa_interrupt_reg);
664 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
665 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
667 pmcraid_info("PCI config is not accessible starting BIST\n");
668 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
669 pmcraid_start_bist(cmd);
674 * pmcraid_timeout_handler - Timeout handler for internally generated ops
676 * @t: pointer to command structure, that got timedout
678 * This function blocks host requests and initiates an adapter reset.
683 static void pmcraid_timeout_handler(struct timer_list *t)
685 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
686 struct pmcraid_instance *pinstance = cmd->drv_inst;
687 unsigned long lock_flags;
689 dev_info(&pinstance->pdev->dev,
690 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
691 cmd->ioa_cb->ioarcb.cdb[0]);
693 /* Command timeouts result in hard reset sequence. The command that got
694 * timed out may be the one used as part of reset sequence. In this
695 * case restart reset sequence using the same command block even if
696 * reset is in progress. Otherwise fail this command and get a free
697 * command block to restart the reset sequence.
699 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
700 if (!pinstance->ioa_reset_in_progress) {
701 pinstance->ioa_reset_attempts = 0;
702 cmd = pmcraid_get_free_cmd(pinstance);
704 /* If we are out of command blocks, just return here itself.
705 * Some other command's timeout handler can do the reset job
708 spin_unlock_irqrestore(pinstance->host->host_lock,
710 pmcraid_err("no free cmnd block for timeout handler\n");
714 pinstance->reset_cmd = cmd;
715 pinstance->ioa_reset_in_progress = 1;
717 pmcraid_info("reset is already in progress\n");
719 if (pinstance->reset_cmd != cmd) {
720 /* This command should have been given to IOA, this
721 * command will be completed by fail_outstanding_cmds
724 pmcraid_err("cmd is pending but reset in progress\n");
727 /* If this command was being used as part of the reset
728 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
729 * causes fail_outstanding_commands not to return the command
730 * block back to free pool
732 if (cmd == pinstance->reset_cmd)
733 cmd->cmd_done = pmcraid_ioa_reset;
736 /* Notify apps of important IOA bringup/bringdown sequences */
737 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
738 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
739 pmcraid_notify_ioastate(pinstance,
740 PMC_DEVICE_EVENT_RESET_START);
742 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
743 scsi_block_requests(pinstance->host);
744 pmcraid_reset_alert(cmd);
745 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
749 * pmcraid_internal_done - completion routine for internally generated cmds
751 * @cmd: command that got response from IOA
756 static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
758 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
759 cmd->ioa_cb->ioarcb.cdb[0],
760 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
762 /* Some of the internal commands are sent with callers blocking for the
763 * response. Same will be indicated as part of cmd->completion_req
764 * field. Response path needs to wake up any waiters waiting for cmd
765 * completion if this flag is set.
767 if (cmd->completion_req) {
768 cmd->completion_req = 0;
769 complete(&cmd->wait_for_completion);
772 /* most of the internal commands are completed by caller itself, so
773 * no need to return the command block back to free pool until we are
774 * required to do so (e.g once done with initialization).
778 pmcraid_return_cmd(cmd);
783 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
785 * @cmd: command that got response from IOA
787 * This routine is called after driver re-reads configuration table due to a
788 * lost CCN. It returns the command block back to free pool and schedules
789 * worker thread to add/delete devices into the system.
794 static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
796 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
797 cmd->ioa_cb->ioarcb.cdb[0],
798 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
802 pmcraid_return_cmd(cmd);
804 pmcraid_info("scheduling worker for config table reinitialization\n");
805 schedule_work(&cmd->drv_inst->worker_q);
809 * pmcraid_erp_done - Process completion of SCSI error response from device
810 * @cmd: pmcraid_command
812 * This function copies the sense buffer into the scsi_cmd struct and completes
813 * scsi_cmd by calling scsi_done function.
818 static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
820 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
821 struct pmcraid_instance *pinstance = cmd->drv_inst;
822 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
824 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
825 scsi_cmd->result |= (DID_ERROR << 16);
826 scmd_printk(KERN_INFO, scsi_cmd,
827 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
828 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
831 if (cmd->sense_buffer) {
832 dma_unmap_single(&pinstance->pdev->dev, cmd->sense_buffer_dma,
833 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
834 cmd->sense_buffer = NULL;
835 cmd->sense_buffer_dma = 0;
838 scsi_dma_unmap(scsi_cmd);
839 pmcraid_return_cmd(cmd);
840 scsi_cmd->scsi_done(scsi_cmd);
844 * _pmcraid_fire_command - sends an IOA command to adapter
846 * This function adds the given block into pending command list
847 * and returns without waiting
849 * @cmd : command to be sent to the device
854 static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
856 struct pmcraid_instance *pinstance = cmd->drv_inst;
857 unsigned long lock_flags;
859 /* Add this command block to pending cmd pool. We do this prior to
860 * writting IOARCB to ioarrin because IOA might complete the command
861 * by the time we are about to add it to the list. Response handler
862 * (isr/tasklet) looks for cmd block in the pending pending list.
864 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
865 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
866 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
867 atomic_inc(&pinstance->outstanding_cmds);
869 /* driver writes lower 32-bit value of IOARCB address only */
871 iowrite32(le64_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), pinstance->ioarrin);
875 * pmcraid_send_cmd - fires a command to IOA
877 * This function also sets up timeout function, and command completion
880 * @cmd: pointer to the command block to be fired to IOA
881 * @cmd_done: command completion function, called once IOA responds
882 * @timeout: timeout to wait for this command completion
883 * @timeout_func: timeout handler
888 static void pmcraid_send_cmd(
889 struct pmcraid_cmd *cmd,
890 void (*cmd_done) (struct pmcraid_cmd *),
891 unsigned long timeout,
892 void (*timeout_func) (struct timer_list *)
895 /* initialize done function */
896 cmd->cmd_done = cmd_done;
899 /* setup timeout handler */
900 cmd->timer.expires = jiffies + timeout;
901 cmd->timer.function = timeout_func;
902 add_timer(&cmd->timer);
905 /* fire the command to IOA */
906 _pmcraid_fire_command(cmd);
910 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
911 * @cmd: pointer to the command block used for sending IOA shutdown command
916 static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
918 struct pmcraid_instance *pinstance = cmd->drv_inst;
919 unsigned long lock_flags;
921 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
922 pmcraid_ioa_reset(cmd);
923 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
927 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
929 * @cmd: pointer to the command block used as part of reset sequence
934 static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
936 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
937 cmd->ioa_cb->ioarcb.cdb[0],
938 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
940 /* Note that commands sent during reset require next command to be sent
941 * to IOA. Hence reinit the done function as well as timeout function
943 pmcraid_reinit_cmdblk(cmd);
944 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
945 cmd->ioa_cb->ioarcb.resource_handle =
946 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
947 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
948 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
950 /* fire shutdown command to hardware. */
951 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
952 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
954 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
956 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
957 PMCRAID_SHUTDOWN_TIMEOUT,
958 pmcraid_timeout_handler);
961 static void pmcraid_querycfg(struct pmcraid_cmd *);
963 * pmcraid_get_fwversion_done - completion function for get_fwversion
965 * @cmd: pointer to command block used to send INQUIRY command
970 static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
972 struct pmcraid_instance *pinstance = cmd->drv_inst;
973 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
974 unsigned long lock_flags;
976 /* configuration table entry size depends on firmware version. If fw
977 * version is not known, it is not possible to interpret IOA config
981 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
982 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
983 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
984 pmcraid_reset_alert(cmd);
985 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
987 pmcraid_querycfg(cmd);
992 * pmcraid_get_fwversion - reads firmware version information
994 * @cmd: pointer to command block used to send INQUIRY command
999 static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1001 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1002 struct pmcraid_ioadl_desc *ioadl;
1003 struct pmcraid_instance *pinstance = cmd->drv_inst;
1004 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1006 pmcraid_reinit_cmdblk(cmd);
1007 ioarcb->request_type = REQ_TYPE_SCSI;
1008 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1009 ioarcb->cdb[0] = INQUIRY;
1011 ioarcb->cdb[2] = 0xD0;
1012 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1013 ioarcb->cdb[4] = data_size & 0xFF;
1015 /* Since entire inquiry data it can be part of IOARCB itself
1017 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1018 offsetof(struct pmcraid_ioarcb,
1019 add_data.u.ioadl[0]));
1020 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1021 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
1023 ioarcb->request_flags0 |= NO_LINK_DESCS;
1024 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1025 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1026 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1027 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1028 ioadl->data_len = cpu_to_le32(data_size);
1030 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1031 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1035 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1036 * @cmd: pointer to command block to be used for identify hrrq
1041 static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1043 struct pmcraid_instance *pinstance = cmd->drv_inst;
1044 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1045 int index = cmd->hrrq_index;
1046 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1047 __be32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
1048 void (*done_function)(struct pmcraid_cmd *);
1050 pmcraid_reinit_cmdblk(cmd);
1051 cmd->hrrq_index = index + 1;
1053 if (cmd->hrrq_index < pinstance->num_hrrq) {
1054 done_function = pmcraid_identify_hrrq;
1056 cmd->hrrq_index = 0;
1057 done_function = pmcraid_get_fwversion;
1060 /* Initialize ioarcb */
1061 ioarcb->request_type = REQ_TYPE_IOACMD;
1062 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1064 /* initialize the hrrq number where IOA will respond to this command */
1065 ioarcb->hrrq_id = index;
1066 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1067 ioarcb->cdb[1] = index;
1069 /* IOA expects 64-bit pci address to be written in B.E format
1070 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1072 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1073 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
1075 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1076 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1078 /* Subsequent commands require HRRQ identification to be successful.
1079 * Note that this gets called even during reset from SCSI mid-layer
1082 pmcraid_send_cmd(cmd, done_function,
1083 PMCRAID_INTERNAL_TIMEOUT,
1084 pmcraid_timeout_handler);
1087 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1088 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1091 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1093 * @cmd: initialized command block pointer
1098 static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1100 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1101 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1103 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1105 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1109 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1111 * @pinstance: pointer to adapter instance structure
1115 * pointer to initialized pmcraid_cmd structure or NULL
1117 static struct pmcraid_cmd *pmcraid_init_hcam
1119 struct pmcraid_instance *pinstance,
1123 struct pmcraid_cmd *cmd;
1124 struct pmcraid_ioarcb *ioarcb;
1125 struct pmcraid_ioadl_desc *ioadl;
1126 struct pmcraid_hostrcb *hcam;
1127 void (*cmd_done) (struct pmcraid_cmd *);
1131 cmd = pmcraid_get_free_cmd(pinstance);
1134 pmcraid_err("no free command blocks for hcam\n");
1138 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
1139 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
1140 cmd_done = pmcraid_process_ccn;
1141 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1142 hcam = &pinstance->ccn;
1144 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1145 cmd_done = pmcraid_process_ldn;
1146 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1147 hcam = &pinstance->ldn;
1150 /* initialize command pointer used for HCAM registration */
1153 ioarcb = &cmd->ioa_cb->ioarcb;
1154 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1155 offsetof(struct pmcraid_ioarcb,
1156 add_data.u.ioadl[0]));
1157 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1158 ioadl = ioarcb->add_data.u.ioadl;
1160 /* Initialize ioarcb */
1161 ioarcb->request_type = REQ_TYPE_HCAM;
1162 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1163 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1164 ioarcb->cdb[1] = type;
1165 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1166 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1168 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1170 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
1171 ioadl[0].data_len = cpu_to_le32(rcb_size);
1172 ioadl[0].address = cpu_to_le64(dma);
1174 cmd->cmd_done = cmd_done;
1179 * pmcraid_send_hcam - Send an HCAM to IOA
1180 * @pinstance: ioa config struct
1183 * This function will send a Host Controlled Async command to IOA.
1188 static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1190 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1191 pmcraid_send_hcam_cmd(cmd);
1196 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1198 * @cmd: pointer to cmd that is used as cancelling command
1199 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1201 static void pmcraid_prepare_cancel_cmd(
1202 struct pmcraid_cmd *cmd,
1203 struct pmcraid_cmd *cmd_to_cancel
1206 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1209 /* IOARCB address of the command to be cancelled is given in
1210 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1211 * IOARCB address are not masked.
1213 ioarcb_addr = cpu_to_be64(le64_to_cpu(cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr));
1215 /* Get the resource handle to where the command to be aborted has been
1218 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1219 ioarcb->request_type = REQ_TYPE_IOACMD;
1220 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1221 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1223 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1227 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1229 * @cmd: command to be used as cancelling command
1231 * @cmd_done: op done function for the cancelling command
1233 static void pmcraid_cancel_hcam(
1234 struct pmcraid_cmd *cmd,
1236 void (*cmd_done) (struct pmcraid_cmd *)
1239 struct pmcraid_instance *pinstance;
1240 struct pmcraid_hostrcb *hcam;
1242 pinstance = cmd->drv_inst;
1243 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1244 &pinstance->ldn : &pinstance->ccn;
1246 /* prepare for cancelling previous hcam command. If the HCAM is
1247 * currently not pending with IOA, we would have hcam->cmd as non-null
1249 if (hcam->cmd == NULL)
1252 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1254 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1255 * schedule queuecommand while we are doing this
1257 pmcraid_send_cmd(cmd, cmd_done,
1258 PMCRAID_INTERNAL_TIMEOUT,
1259 pmcraid_timeout_handler);
1263 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1265 * @cmd: command block to be used for cancelling the HCAM
1267 static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1269 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1270 cmd->ioa_cb->ioarcb.cdb[0],
1271 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1273 pmcraid_reinit_cmdblk(cmd);
1275 pmcraid_cancel_hcam(cmd,
1276 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1277 pmcraid_ioa_shutdown);
1281 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1283 * @cmd: command block to be used for cancelling the HCAM
1285 static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1287 pmcraid_cancel_hcam(cmd,
1288 PMCRAID_HCAM_CODE_LOG_DATA,
1289 pmcraid_cancel_ccn);
1293 * pmcraid_expose_resource - check if the resource can be exposed to OS
1295 * @fw_version: firmware version code
1296 * @cfgte: pointer to configuration table entry of the resource
1299 * true if resource can be added to midlayer, false(0) otherwise
1301 static int pmcraid_expose_resource(u16 fw_version,
1302 struct pmcraid_config_table_entry *cfgte)
1306 if (cfgte->resource_type == RES_TYPE_VSET) {
1307 if (fw_version <= PMCRAID_FW_VERSION_1)
1308 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1310 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1311 (cfgte->unique_flags1 & 0x80) == 0);
1313 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
1314 retval = (RES_BUS(cfgte->resource_address) !=
1315 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1319 /* attributes supported by pmcraid_event_family */
1321 PMCRAID_AEN_ATTR_UNSPEC,
1322 PMCRAID_AEN_ATTR_EVENT,
1323 __PMCRAID_AEN_ATTR_MAX,
1325 #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1327 /* commands supported by pmcraid_event_family */
1329 PMCRAID_AEN_CMD_UNSPEC,
1330 PMCRAID_AEN_CMD_EVENT,
1331 __PMCRAID_AEN_CMD_MAX,
1333 #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1335 static struct genl_multicast_group pmcraid_mcgrps[] = {
1336 { .name = "events", /* not really used - see ID discussion below */ },
1339 static struct genl_family pmcraid_event_family __ro_after_init = {
1340 .module = THIS_MODULE,
1343 .maxattr = PMCRAID_AEN_ATTR_MAX,
1344 .mcgrps = pmcraid_mcgrps,
1345 .n_mcgrps = ARRAY_SIZE(pmcraid_mcgrps),
1349 * pmcraid_netlink_init - registers pmcraid_event_family
1352 * 0 if the pmcraid_event_family is successfully registered
1353 * with netlink generic, non-zero otherwise
1355 static int __init pmcraid_netlink_init(void)
1359 result = genl_register_family(&pmcraid_event_family);
1364 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1365 pmcraid_event_family.id);
1371 * pmcraid_netlink_release - unregisters pmcraid_event_family
1376 static void pmcraid_netlink_release(void)
1378 genl_unregister_family(&pmcraid_event_family);
1382 * pmcraid_notify_aen - sends event msg to user space application
1383 * @pinstance: pointer to adapter instance structure
1386 * 0 if success, error value in case of any failure.
1388 static int pmcraid_notify_aen(
1389 struct pmcraid_instance *pinstance,
1390 struct pmcraid_aen_msg *aen_msg,
1393 struct sk_buff *skb;
1395 u32 total_size, nla_genl_hdr_total_size;
1398 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1399 MINOR(pinstance->cdev.dev));
1400 aen_msg->length = data_size;
1402 data_size += sizeof(*aen_msg);
1404 total_size = nla_total_size(data_size);
1405 /* Add GENL_HDR to total_size */
1406 nla_genl_hdr_total_size =
1407 (total_size + (GENL_HDRLEN +
1408 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1410 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
1414 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1419 /* add the genetlink message header */
1420 msg_header = genlmsg_put(skb, 0, 0,
1421 &pmcraid_event_family, 0,
1422 PMCRAID_AEN_CMD_EVENT);
1424 pmcraid_err("failed to copy command details\n");
1429 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1432 pmcraid_err("failed to copy AEN attribute data\n");
1437 /* send genetlink multicast message to notify appplications */
1438 genlmsg_end(skb, msg_header);
1440 result = genlmsg_multicast(&pmcraid_event_family, skb,
1443 /* If there are no listeners, genlmsg_multicast may return non-zero
1447 pmcraid_info("error (%x) sending aen event message\n", result);
1452 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1453 * @pinstance: pointer adapter instance structure
1456 * 0 if success, error value in case of any failure
1458 static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1460 return pmcraid_notify_aen(pinstance,
1462 le32_to_cpu(pinstance->ccn.hcam->data_len) +
1463 sizeof(struct pmcraid_hcam_hdr));
1467 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1468 * @pinstance: pointer adapter instance structure
1471 * 0 if success, error value in case of any failure
1473 static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1475 return pmcraid_notify_aen(pinstance,
1477 le32_to_cpu(pinstance->ldn.hcam->data_len) +
1478 sizeof(struct pmcraid_hcam_hdr));
1482 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1483 * @pinstance: pointer adapter instance structure
1484 * @evt: controller state event to be sent
1487 * 0 if success, error value in case of any failure
1489 static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1491 pinstance->scn.ioa_state = evt;
1492 pmcraid_notify_aen(pinstance,
1493 &pinstance->scn.msg,
1498 * pmcraid_handle_config_change - Handle a config change from the adapter
1499 * @pinstance: pointer to per adapter instance structure
1505 static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1507 struct pmcraid_config_table_entry *cfg_entry;
1508 struct pmcraid_hcam_ccn *ccn_hcam;
1509 struct pmcraid_cmd *cmd;
1510 struct pmcraid_cmd *cfgcmd;
1511 struct pmcraid_resource_entry *res = NULL;
1512 unsigned long lock_flags;
1513 unsigned long host_lock_flags;
1515 u32 hidden_entry = 0;
1519 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1520 cfg_entry = &ccn_hcam->cfg_entry;
1521 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
1523 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1524 res: %x:%x:%x:%x\n",
1525 le32_to_cpu(pinstance->ccn.hcam->ilid),
1526 pinstance->ccn.hcam->op_code,
1527 (le32_to_cpu(pinstance->ccn.hcam->timestamp1) |
1528 ((le32_to_cpu(pinstance->ccn.hcam->timestamp2) & 0xffffffffLL) << 32)),
1529 pinstance->ccn.hcam->notification_type,
1530 pinstance->ccn.hcam->notification_lost,
1531 pinstance->ccn.hcam->flags,
1532 pinstance->host->unique_id,
1533 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1534 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1535 RES_BUS(cfg_entry->resource_address)),
1536 RES_IS_VSET(*cfg_entry) ?
1537 (fw_version <= PMCRAID_FW_VERSION_1 ?
1538 cfg_entry->unique_flags1 :
1539 le16_to_cpu(cfg_entry->array_id) & 0xFF) :
1540 RES_TARGET(cfg_entry->resource_address),
1541 RES_LUN(cfg_entry->resource_address));
1544 /* If this HCAM indicates a lost notification, read the config table */
1545 if (pinstance->ccn.hcam->notification_lost) {
1546 cfgcmd = pmcraid_get_free_cmd(pinstance);
1548 pmcraid_info("lost CCN, reading config table\b");
1549 pinstance->reinit_cfg_table = 1;
1550 pmcraid_querycfg(cfgcmd);
1552 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1554 goto out_notify_apps;
1557 /* If this resource is not going to be added to mid-layer, just notify
1558 * applications and return. If this notification is about hiding a VSET
1559 * resource, check if it was exposed already.
1561 if (pinstance->ccn.hcam->notification_type ==
1562 NOTIFICATION_TYPE_ENTRY_CHANGED &&
1563 cfg_entry->resource_type == RES_TYPE_VSET) {
1564 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1565 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
1566 goto out_notify_apps;
1569 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1570 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1571 rc = memcmp(&res->cfg_entry.resource_address,
1572 &cfg_entry->resource_address,
1573 sizeof(cfg_entry->resource_address));
1583 spin_unlock_irqrestore(&pinstance->resource_lock,
1585 goto out_notify_apps;
1588 /* If there are more number of resources than what driver can
1589 * manage, do not notify the applications about the CCN. Just
1590 * ignore this notifications and re-register the same HCAM
1592 if (list_empty(&pinstance->free_res_q)) {
1593 spin_unlock_irqrestore(&pinstance->resource_lock,
1595 pmcraid_err("too many resources attached\n");
1596 spin_lock_irqsave(pinstance->host->host_lock,
1598 pmcraid_send_hcam(pinstance,
1599 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1600 spin_unlock_irqrestore(pinstance->host->host_lock,
1605 res = list_entry(pinstance->free_res_q.next,
1606 struct pmcraid_resource_entry, queue);
1608 list_del(&res->queue);
1609 res->scsi_dev = NULL;
1610 res->reset_progress = 0;
1611 list_add_tail(&res->queue, &pinstance->used_res_q);
1614 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
1616 if (pinstance->ccn.hcam->notification_type ==
1617 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
1618 if (res->scsi_dev) {
1619 if (fw_version <= PMCRAID_FW_VERSION_1)
1620 res->cfg_entry.unique_flags1 &= 0x7F;
1622 res->cfg_entry.array_id &= cpu_to_le16(0xFF);
1623 res->change_detected = RES_CHANGE_DEL;
1624 res->cfg_entry.resource_handle =
1625 PMCRAID_INVALID_RES_HANDLE;
1626 schedule_work(&pinstance->worker_q);
1628 /* This may be one of the non-exposed resources */
1629 list_move_tail(&res->queue, &pinstance->free_res_q);
1631 } else if (!res->scsi_dev) {
1632 res->change_detected = RES_CHANGE_ADD;
1633 schedule_work(&pinstance->worker_q);
1635 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1639 /* Notify configuration changes to registered applications.*/
1640 if (!pmcraid_disable_aen)
1641 pmcraid_notify_ccn(pinstance);
1643 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1645 pmcraid_send_hcam_cmd(cmd);
1649 * pmcraid_get_error_info - return error string for an ioasc
1650 * @ioasc: ioasc code
1654 static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1657 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1658 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1659 return &pmcraid_ioasc_error_table[i];
1665 * pmcraid_ioasc_logger - log IOASC information based user-settings
1666 * @ioasc: ioasc code
1667 * @cmd: pointer to command that resulted in 'ioasc'
1669 static void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1671 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1673 if (error_info == NULL ||
1674 cmd->drv_inst->current_log_level < error_info->log_level)
1677 /* log the error string */
1678 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1679 cmd->ioa_cb->ioarcb.cdb[0],
1680 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
1681 ioasc, error_info->error_string);
1685 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1687 * @pinstance: pointer to per adapter instance structure
1692 static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1694 struct pmcraid_hcam_ldn *hcam_ldn;
1697 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1700 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1701 pinstance->ldn.hcam->ilid,
1702 pinstance->ldn.hcam->op_code,
1703 pinstance->ldn.hcam->notification_type,
1704 pinstance->ldn.hcam->notification_lost,
1705 pinstance->ldn.hcam->flags,
1706 pinstance->ldn.hcam->overlay_id);
1708 /* log only the errors, no need to log informational log entries */
1709 if (pinstance->ldn.hcam->notification_type !=
1710 NOTIFICATION_TYPE_ERROR_LOG)
1713 if (pinstance->ldn.hcam->notification_lost ==
1714 HOSTRCB_NOTIFICATIONS_LOST)
1715 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
1717 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1719 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1720 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
1721 dev_info(&pinstance->pdev->dev,
1722 "UnitAttention due to IOA Bus Reset\n");
1723 scsi_report_bus_reset(
1725 RES_BUS(hcam_ldn->error_log.fd_ra));
1732 * pmcraid_process_ccn - Op done function for a CCN.
1733 * @cmd: pointer to command struct
1735 * This function is the op done function for a configuration
1736 * change notification
1741 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1743 struct pmcraid_instance *pinstance = cmd->drv_inst;
1744 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1745 unsigned long lock_flags;
1747 pinstance->ccn.cmd = NULL;
1748 pmcraid_return_cmd(cmd);
1750 /* If driver initiated IOA reset happened while this hcam was pending
1751 * with IOA, or IOA bringdown sequence is in progress, no need to
1752 * re-register the hcam
1754 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1755 atomic_read(&pinstance->ccn.ignore) == 1) {
1758 dev_info(&pinstance->pdev->dev,
1759 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1760 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1761 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1762 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1764 pmcraid_handle_config_change(pinstance);
1768 static void pmcraid_initiate_reset(struct pmcraid_instance *);
1769 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
1771 * pmcraid_process_ldn - op done function for an LDN
1772 * @cmd: pointer to command block
1777 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1779 struct pmcraid_instance *pinstance = cmd->drv_inst;
1780 struct pmcraid_hcam_ldn *ldn_hcam =
1781 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1782 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1783 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1784 unsigned long lock_flags;
1786 /* return the command block back to freepool */
1787 pinstance->ldn.cmd = NULL;
1788 pmcraid_return_cmd(cmd);
1790 /* If driver initiated IOA reset happened while this hcam was pending
1791 * with IOA, no need to re-register the hcam as reset engine will do it
1792 * once reset sequence is complete
1794 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1795 atomic_read(&pinstance->ccn.ignore) == 1) {
1797 } else if (!ioasc) {
1798 pmcraid_handle_error_log(pinstance);
1799 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1800 spin_lock_irqsave(pinstance->host->host_lock,
1802 pmcraid_initiate_reset(pinstance);
1803 spin_unlock_irqrestore(pinstance->host->host_lock,
1807 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1808 pinstance->timestamp_error = 1;
1809 pmcraid_set_timestamp(cmd);
1812 dev_info(&pinstance->pdev->dev,
1813 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1815 /* send netlink message for HCAM notification if enabled */
1816 if (!pmcraid_disable_aen)
1817 pmcraid_notify_ldn(pinstance);
1819 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1821 pmcraid_send_hcam_cmd(cmd);
1825 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1827 * @pinstance: pointer per adapter instance structure
1832 static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1834 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1835 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1839 * pmcraid_unregister_hcams - cancel HCAMs registered already
1840 * @cmd: pointer to command used as part of reset sequence
1842 static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1844 struct pmcraid_instance *pinstance = cmd->drv_inst;
1846 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1847 * handling hcam response though it is not necessary. In order to
1848 * prevent this, set 'ignore', so that bring-down sequence doesn't
1849 * re-send any more hcams
1851 atomic_set(&pinstance->ccn.ignore, 1);
1852 atomic_set(&pinstance->ldn.ignore, 1);
1854 /* If adapter reset was forced as part of runtime reset sequence,
1855 * start the reset sequence. Reset will be triggered even in case
1858 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1859 pinstance->ioa_unit_check) {
1860 pinstance->force_ioa_reset = 0;
1861 pinstance->ioa_unit_check = 0;
1862 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1863 pmcraid_reset_alert(cmd);
1867 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1868 * one after the other. So CCN cancellation will be triggered by
1869 * pmcraid_cancel_ldn itself.
1871 pmcraid_cancel_ldn(cmd);
1874 static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1877 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1878 * @pinstance: pointer to adapter instance structure
1880 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1882 static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1886 pmcraid_reinit_buffers(pinstance);
1887 intrs = pmcraid_read_interrupts(pinstance);
1889 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1891 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
1892 if (!pinstance->interrupt_mode) {
1893 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1894 pinstance->int_regs.
1895 ioa_host_interrupt_mask_reg);
1896 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1897 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1906 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1907 * @cmd : pointer to reset command block
1912 static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1914 struct pmcraid_instance *pinstance = cmd->drv_inst;
1918 /* There will be an interrupt when Transition to Operational bit is
1919 * set so tasklet would execute next reset task. The timeout handler
1920 * would re-initiate a reset
1922 cmd->cmd_done = pmcraid_ioa_reset;
1923 cmd->timer.expires = jiffies +
1924 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
1925 cmd->timer.function = pmcraid_timeout_handler;
1927 if (!timer_pending(&cmd->timer))
1928 add_timer(&cmd->timer);
1930 /* Enable destructive diagnostics on IOA if it is not yet in
1933 doorbell = DOORBELL_RUNTIME_RESET |
1934 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
1936 /* Since we do RESET_ALERT and Start BIST we have to again write
1937 * MSIX Doorbell to indicate the interrupt mode
1939 if (pinstance->interrupt_mode) {
1940 iowrite32(DOORBELL_INTR_MODE_MSIX,
1941 pinstance->int_regs.host_ioa_interrupt_reg);
1942 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
1945 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
1946 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
1947 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
1949 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
1950 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
1955 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
1957 * @pinstance: pointer to adapter instance structure
1962 static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
1964 pmcraid_info("%s is not yet implemented\n", __func__);
1968 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
1969 * @pinstance: pointer to adapter instance structure
1971 * This function fails all outstanding ops. If they are submitted to IOA
1972 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
1973 * otherwise just completes the commands and returns the cmd blocks to free
1979 static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
1981 struct pmcraid_cmd *cmd, *temp;
1982 unsigned long lock_flags;
1984 /* pending command list is protected by pending_pool_lock. Its
1985 * traversal must be done as within this lock
1987 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
1988 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
1990 list_del(&cmd->free_list);
1991 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
1993 cmd->ioa_cb->ioasa.ioasc =
1994 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
1995 cmd->ioa_cb->ioasa.ilid =
1996 cpu_to_le32(PMCRAID_DRIVER_ILID);
1998 /* In case the command timer is still running */
1999 del_timer(&cmd->timer);
2001 /* If this is an IO command, complete it by invoking scsi_done
2002 * function. If this is one of the internal commands other
2003 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2006 if (cmd->scsi_cmd) {
2008 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2009 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2011 scsi_cmd->result |= DID_ERROR << 16;
2013 scsi_dma_unmap(scsi_cmd);
2014 pmcraid_return_cmd(cmd);
2016 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2017 le32_to_cpu(resp) >> 2,
2018 cmd->ioa_cb->ioarcb.cdb[0],
2020 scsi_cmd->scsi_done(scsi_cmd);
2021 } else if (cmd->cmd_done == pmcraid_internal_done ||
2022 cmd->cmd_done == pmcraid_erp_done) {
2024 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2025 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
2026 pmcraid_return_cmd(cmd);
2029 atomic_dec(&pinstance->outstanding_cmds);
2030 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2033 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2037 * pmcraid_ioa_reset - Implementation of IOA reset logic
2039 * @cmd: pointer to the cmd block to be used for entire reset process
2041 * This function executes most of the steps required for IOA reset. This gets
2042 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2043 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2044 * synchronized using host lock. Various functions called during reset process
2045 * would make use of a single command block, pointer to which is also stored in
2046 * adapter instance structure.
2051 static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2053 struct pmcraid_instance *pinstance = cmd->drv_inst;
2054 u8 reset_complete = 0;
2056 pinstance->ioa_reset_in_progress = 1;
2058 if (pinstance->reset_cmd != cmd) {
2059 pmcraid_err("reset is called with different command block\n");
2060 pinstance->reset_cmd = cmd;
2063 pmcraid_info("reset_engine: state = %d, command = %p\n",
2064 pinstance->ioa_state, cmd);
2066 switch (pinstance->ioa_state) {
2068 case IOA_STATE_DEAD:
2069 /* If IOA is offline, whatever may be the reset reason, just
2070 * return. callers might be waiting on the reset wait_q, wake
2073 pmcraid_err("IOA is offline no reset is possible\n");
2077 case IOA_STATE_IN_BRINGDOWN:
2078 /* we enter here, once ioa shutdown command is processed by IOA
2079 * Alert IOA for a possible reset. If reset alert fails, IOA
2080 * goes through hard-reset
2082 pmcraid_disable_interrupts(pinstance, ~0);
2083 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2084 pmcraid_reset_alert(cmd);
2087 case IOA_STATE_UNKNOWN:
2088 /* We may be called during probe or resume. Some pre-processing
2089 * is required for prior to reset
2091 scsi_block_requests(pinstance->host);
2093 /* If asked to reset while IOA was processing responses or
2094 * there are any error responses then IOA may require
2097 if (pinstance->ioa_hard_reset == 0) {
2098 if (ioread32(pinstance->ioa_status) &
2099 INTRS_TRANSITION_TO_OPERATIONAL) {
2100 pmcraid_info("sticky bit set, bring-up\n");
2101 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2102 pmcraid_reinit_cmdblk(cmd);
2103 pmcraid_identify_hrrq(cmd);
2105 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2106 pmcraid_soft_reset(cmd);
2109 /* Alert IOA of a possible reset and wait for critical
2110 * operation in progress bit to reset
2112 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2113 pmcraid_reset_alert(cmd);
2117 case IOA_STATE_IN_RESET_ALERT:
2118 /* If critical operation in progress bit is reset or wait gets
2119 * timed out, reset proceeds with starting BIST on the IOA.
2120 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2121 * they are 3 or more, reset engine marks IOA dead and returns
2123 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2124 pmcraid_start_bist(cmd);
2127 case IOA_STATE_IN_HARD_RESET:
2128 pinstance->ioa_reset_attempts++;
2130 /* retry reset if we haven't reached maximum allowed limit */
2131 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2132 pinstance->ioa_reset_attempts = 0;
2133 pmcraid_err("IOA didn't respond marking it as dead\n");
2134 pinstance->ioa_state = IOA_STATE_DEAD;
2136 if (pinstance->ioa_bringdown)
2137 pmcraid_notify_ioastate(pinstance,
2138 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2140 pmcraid_notify_ioastate(pinstance,
2141 PMC_DEVICE_EVENT_RESET_FAILED);
2146 /* Once either bist or pci reset is done, restore PCI config
2147 * space. If this fails, proceed with hard reset again
2149 pci_restore_state(pinstance->pdev);
2151 /* fail all pending commands */
2152 pmcraid_fail_outstanding_cmds(pinstance);
2154 /* check if unit check is active, if so extract dump */
2155 if (pinstance->ioa_unit_check) {
2156 pmcraid_info("unit check is active\n");
2157 pinstance->ioa_unit_check = 0;
2158 pmcraid_get_dump(pinstance);
2159 pinstance->ioa_reset_attempts--;
2160 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2161 pmcraid_reset_alert(cmd);
2165 /* if the reset reason is to bring-down the ioa, we might be
2166 * done with the reset restore pci_config_space and complete
2169 if (pinstance->ioa_bringdown) {
2170 pmcraid_info("bringing down the adapter\n");
2171 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2172 pinstance->ioa_bringdown = 0;
2173 pinstance->ioa_state = IOA_STATE_UNKNOWN;
2174 pmcraid_notify_ioastate(pinstance,
2175 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
2178 /* bring-up IOA, so proceed with soft reset
2179 * Reinitialize hrrq_buffers and their indices also
2180 * enable interrupts after a pci_restore_state
2182 if (pmcraid_reset_enable_ioa(pinstance)) {
2183 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2184 pmcraid_info("bringing up the adapter\n");
2185 pmcraid_reinit_cmdblk(cmd);
2186 pmcraid_identify_hrrq(cmd);
2188 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2189 pmcraid_soft_reset(cmd);
2194 case IOA_STATE_IN_SOFT_RESET:
2195 /* TRANSITION TO OPERATIONAL is on so start initialization
2198 pmcraid_info("In softreset proceeding with bring-up\n");
2199 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2201 /* Initialization commands start with HRRQ identification. From
2202 * now on tasklet completes most of the commands as IOA is up
2203 * and intrs are enabled
2205 pmcraid_identify_hrrq(cmd);
2208 case IOA_STATE_IN_BRINGUP:
2209 /* we are done with bringing up of IOA, change the ioa_state to
2210 * operational and wake up any waiters
2212 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2216 case IOA_STATE_OPERATIONAL:
2218 /* When IOA is operational and a reset is requested, check for
2219 * the reset reason. If reset is to bring down IOA, unregister
2220 * HCAMs and initiate shutdown; if adapter reset is forced then
2221 * restart reset sequence again
2223 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2224 pinstance->force_ioa_reset == 0) {
2225 pmcraid_notify_ioastate(pinstance,
2226 PMC_DEVICE_EVENT_RESET_SUCCESS);
2229 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2230 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2231 pmcraid_reinit_cmdblk(cmd);
2232 pmcraid_unregister_hcams(cmd);
2237 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2238 * OPERATIONAL. Reset all control variables used during reset, wake up
2239 * any waiting threads and let the SCSI mid-layer send commands. Note
2240 * that host_lock must be held before invoking scsi_report_bus_reset.
2242 if (reset_complete) {
2243 pinstance->ioa_reset_in_progress = 0;
2244 pinstance->ioa_reset_attempts = 0;
2245 pinstance->reset_cmd = NULL;
2246 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2247 pinstance->ioa_bringdown = 0;
2248 pmcraid_return_cmd(cmd);
2250 /* If target state is to bring up the adapter, proceed with
2251 * hcam registration and resource exposure to mid-layer.
2253 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2254 pmcraid_register_hcams(pinstance);
2256 wake_up_all(&pinstance->reset_wait_q);
2263 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2264 * ISR/tasklet during error interrupts including IOA unit check. If reset
2265 * is already in progress, it just returns, otherwise initiates IOA reset
2266 * to bring IOA up to operational state.
2268 * @pinstance: pointer to adapter instance structure
2273 static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2275 struct pmcraid_cmd *cmd;
2277 /* If the reset is already in progress, just return, otherwise start
2278 * reset sequence and return
2280 if (!pinstance->ioa_reset_in_progress) {
2281 scsi_block_requests(pinstance->host);
2282 cmd = pmcraid_get_free_cmd(pinstance);
2285 pmcraid_err("no cmnd blocks for initiate_reset\n");
2289 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2290 pinstance->reset_cmd = cmd;
2291 pinstance->force_ioa_reset = 1;
2292 pmcraid_notify_ioastate(pinstance,
2293 PMC_DEVICE_EVENT_RESET_START);
2294 pmcraid_ioa_reset(cmd);
2299 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2301 * @pinstance: pointer adapter instance structure
2302 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2303 * @target_state: expected target state after reset
2305 * Note: This command initiates reset and waits for its completion. Hence this
2306 * should not be called from isr/timer/tasklet functions (timeout handlers,
2307 * error response handlers and interrupt handlers).
2310 * 1 in case ioa_state is not target_state, 0 otherwise.
2312 static int pmcraid_reset_reload(
2313 struct pmcraid_instance *pinstance,
2318 struct pmcraid_cmd *reset_cmd = NULL;
2319 unsigned long lock_flags;
2322 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2324 if (pinstance->ioa_reset_in_progress) {
2325 pmcraid_info("reset_reload: reset is already in progress\n");
2327 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2329 wait_event(pinstance->reset_wait_q,
2330 !pinstance->ioa_reset_in_progress);
2332 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2334 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2335 pmcraid_info("reset_reload: IOA is dead\n");
2339 if (pinstance->ioa_state == target_state) {
2345 pmcraid_info("reset_reload: proceeding with reset\n");
2346 scsi_block_requests(pinstance->host);
2347 reset_cmd = pmcraid_get_free_cmd(pinstance);
2348 if (reset_cmd == NULL) {
2349 pmcraid_err("no free cmnd for reset_reload\n");
2353 if (shutdown_type == SHUTDOWN_NORMAL)
2354 pinstance->ioa_bringdown = 1;
2356 pinstance->ioa_shutdown_type = shutdown_type;
2357 pinstance->reset_cmd = reset_cmd;
2358 pinstance->force_ioa_reset = reset;
2359 pmcraid_info("reset_reload: initiating reset\n");
2360 pmcraid_ioa_reset(reset_cmd);
2361 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2362 pmcraid_info("reset_reload: waiting for reset to complete\n");
2363 wait_event(pinstance->reset_wait_q,
2364 !pinstance->ioa_reset_in_progress);
2366 pmcraid_info("reset_reload: reset is complete !!\n");
2367 scsi_unblock_requests(pinstance->host);
2368 return pinstance->ioa_state != target_state;
2371 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2376 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2378 * @pinstance: pointer to adapter instance structure
2381 * whatever is returned from pmcraid_reset_reload
2383 static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2385 return pmcraid_reset_reload(pinstance,
2391 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2393 * @pinstance: pointer to adapter instance structure
2396 * whatever is returned from pmcraid_reset_reload
2398 static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2400 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2402 return pmcraid_reset_reload(pinstance,
2404 IOA_STATE_OPERATIONAL);
2408 * pmcraid_request_sense - Send request sense to a device
2409 * @cmd: pmcraid command struct
2411 * This function sends a request sense to a device as a result of a check
2412 * condition. This method re-uses the same command block that failed earlier.
2414 static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2416 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2417 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2418 struct device *dev = &cmd->drv_inst->pdev->dev;
2420 cmd->sense_buffer = cmd->scsi_cmd->sense_buffer;
2421 cmd->sense_buffer_dma = dma_map_single(dev, cmd->sense_buffer,
2422 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
2423 if (dma_mapping_error(dev, cmd->sense_buffer_dma)) {
2425 ("couldn't allocate sense buffer for request sense\n");
2426 pmcraid_erp_done(cmd);
2430 /* re-use the command block */
2431 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2432 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2433 ioarcb->request_flags0 = (SYNC_COMPLETE |
2436 ioarcb->request_type = REQ_TYPE_SCSI;
2437 ioarcb->cdb[0] = REQUEST_SENSE;
2438 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2440 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2441 offsetof(struct pmcraid_ioarcb,
2442 add_data.u.ioadl[0]));
2443 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2445 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2447 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2448 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2449 ioadl->flags = IOADL_FLAGS_LAST_DESC;
2451 /* request sense might be called as part of error response processing
2452 * which runs in tasklets context. It is possible that mid-layer might
2453 * schedule queuecommand during this time, hence, writting to IOARRIN
2454 * must be protect by host_lock
2456 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2457 PMCRAID_REQUEST_SENSE_TIMEOUT,
2458 pmcraid_timeout_handler);
2462 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2463 * @cmd: command that failed
2464 * @need_sense: true if request_sense is required after cancel all
2466 * This function sends a cancel all to a device to clear the queue.
2468 static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, bool need_sense)
2470 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2471 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2472 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2474 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2475 ioarcb->request_flags0 = SYNC_OVERRIDE;
2476 ioarcb->request_type = REQ_TYPE_IOACMD;
2477 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2479 if (RES_IS_GSCSI(res->cfg_entry))
2480 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2482 ioarcb->ioadl_bus_addr = 0;
2483 ioarcb->ioadl_length = 0;
2484 ioarcb->data_transfer_length = 0;
2485 ioarcb->ioarcb_bus_addr &= cpu_to_le64((~0x1FULL));
2487 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2488 * schedule queuecommand while we are doing this
2490 pmcraid_send_cmd(cmd, need_sense ?
2491 pmcraid_erp_done : pmcraid_request_sense,
2492 PMCRAID_REQUEST_SENSE_TIMEOUT,
2493 pmcraid_timeout_handler);
2497 * pmcraid_frame_auto_sense: frame fixed format sense information
2499 * @cmd: pointer to failing command block
2504 static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2506 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2507 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2508 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2509 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2510 u32 failing_lba = 0;
2512 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2513 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2515 if (RES_IS_VSET(res->cfg_entry) &&
2516 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2517 ioasa->u.vset.failing_lba_hi != 0) {
2519 sense_buf[0] = 0x72;
2520 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2521 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2522 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2526 sense_buf[9] = 0x0A;
2527 sense_buf[10] = 0x80;
2529 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2531 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2532 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2533 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2534 sense_buf[15] = failing_lba & 0x000000ff;
2536 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2538 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2539 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2540 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2541 sense_buf[19] = failing_lba & 0x000000ff;
2543 sense_buf[0] = 0x70;
2544 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2545 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2546 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2548 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2549 if (RES_IS_VSET(res->cfg_entry))
2551 le32_to_cpu(ioasa->u.
2552 vset.failing_lba_lo);
2553 sense_buf[0] |= 0x80;
2554 sense_buf[3] = (failing_lba >> 24) & 0xff;
2555 sense_buf[4] = (failing_lba >> 16) & 0xff;
2556 sense_buf[5] = (failing_lba >> 8) & 0xff;
2557 sense_buf[6] = failing_lba & 0xff;
2560 sense_buf[7] = 6; /* additional length */
2565 * pmcraid_error_handler - Error response handlers for a SCSI op
2566 * @cmd: pointer to pmcraid_cmd that has failed
2568 * This function determines whether or not to initiate ERP on the affected
2569 * device. This is called from a tasklet, which doesn't hold any locks.
2572 * 0 it caller can complete the request, otherwise 1 where in error
2573 * handler itself completes the request and returns the command block
2576 static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2578 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2579 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2580 struct pmcraid_instance *pinstance = cmd->drv_inst;
2581 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2582 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2583 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2584 bool sense_copied = false;
2587 pmcraid_info("resource pointer is NULL\n");
2591 /* If this was a SCSI read/write command keep count of errors */
2592 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2593 atomic_inc(&res->read_failures);
2594 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2595 atomic_inc(&res->write_failures);
2597 if (!RES_IS_GSCSI(res->cfg_entry) &&
2598 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2599 pmcraid_frame_auto_sense(cmd);
2602 /* Log IOASC/IOASA information based on user settings */
2603 pmcraid_ioasc_logger(ioasc, cmd);
2605 switch (masked_ioasc) {
2607 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2608 scsi_cmd->result |= (DID_ABORT << 16);
2611 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2612 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2613 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2616 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2618 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2621 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2622 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2625 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2626 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2627 if (!res->reset_progress)
2628 scsi_report_bus_reset(pinstance->host,
2629 scsi_cmd->device->channel);
2630 scsi_cmd->result |= (DID_ERROR << 16);
2633 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2634 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2637 /* if check_condition is not active return with error otherwise
2638 * get/frame the sense buffer
2640 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2641 SAM_STAT_CHECK_CONDITION &&
2642 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2645 /* If we have auto sense data as part of IOASA pass it to
2648 if (ioasa->auto_sense_length != 0) {
2649 short sense_len = le16_to_cpu(ioasa->auto_sense_length);
2650 int data_size = min_t(u16, sense_len,
2651 SCSI_SENSE_BUFFERSIZE);
2653 memcpy(scsi_cmd->sense_buffer,
2656 sense_copied = true;
2659 if (RES_IS_GSCSI(res->cfg_entry))
2660 pmcraid_cancel_all(cmd, sense_copied);
2661 else if (sense_copied)
2662 pmcraid_erp_done(cmd);
2664 pmcraid_request_sense(cmd);
2668 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2672 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2673 scsi_cmd->result |= (DID_ERROR << 16);
2680 * pmcraid_reset_device - device reset handler functions
2682 * @scsi_cmd: scsi command struct
2683 * @timeout: command timeout
2684 * @modifier: reset modifier indicating the reset sequence to be performed
2686 * This function issues a device reset to the affected device.
2687 * A LUN reset will be sent to the device first. If that does
2688 * not work, a target reset will be sent.
2693 static int pmcraid_reset_device(
2694 struct scsi_cmnd *scsi_cmd,
2695 unsigned long timeout,
2698 struct pmcraid_cmd *cmd;
2699 struct pmcraid_instance *pinstance;
2700 struct pmcraid_resource_entry *res;
2701 struct pmcraid_ioarcb *ioarcb;
2702 unsigned long lock_flags;
2706 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2707 res = scsi_cmd->device->hostdata;
2710 sdev_printk(KERN_ERR, scsi_cmd->device,
2711 "reset_device: NULL resource pointer\n");
2715 /* If adapter is currently going through reset/reload, return failed.
2716 * This will force the mid-layer to call _eh_bus/host reset, which
2717 * will then go to sleep and wait for the reset to complete
2719 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2720 if (pinstance->ioa_reset_in_progress ||
2721 pinstance->ioa_state == IOA_STATE_DEAD) {
2722 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2726 res->reset_progress = 1;
2727 pmcraid_info("Resetting %s resource with addr %x\n",
2728 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2729 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2730 le32_to_cpu(res->cfg_entry.resource_address));
2732 /* get a free cmd block */
2733 cmd = pmcraid_get_free_cmd(pinstance);
2736 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2737 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2741 ioarcb = &cmd->ioa_cb->ioarcb;
2742 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2743 ioarcb->request_type = REQ_TYPE_IOACMD;
2744 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2746 /* Initialize reset modifier bits */
2748 modifier = ENABLE_RESET_MODIFIER | modifier;
2750 ioarcb->cdb[1] = modifier;
2752 init_completion(&cmd->wait_for_completion);
2753 cmd->completion_req = 1;
2755 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2756 cmd->ioa_cb->ioarcb.cdb[0],
2757 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2758 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2760 pmcraid_send_cmd(cmd,
2761 pmcraid_internal_done,
2763 pmcraid_timeout_handler);
2765 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2767 /* RESET_DEVICE command completes after all pending IOARCBs are
2768 * completed. Once this command is completed, pmcraind_internal_done
2769 * will wake up the 'completion' queue.
2771 wait_for_completion(&cmd->wait_for_completion);
2773 /* complete the command here itself and return the command block
2776 pmcraid_return_cmd(cmd);
2777 res->reset_progress = 0;
2778 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2780 /* set the return value based on the returned ioasc */
2781 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2785 * _pmcraid_io_done - helper for pmcraid_io_done function
2787 * @cmd: pointer to pmcraid command struct
2788 * @reslen: residual data length to be set in the ioasa
2789 * @ioasc: ioasc either returned by IOA or set by driver itself.
2791 * This function is invoked by pmcraid_io_done to complete mid-layer
2795 * 0 if caller is required to return it to free_pool. Returns 1 if
2796 * caller need not worry about freeing command block as error handler
2797 * will take care of that.
2800 static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2802 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2805 scsi_set_resid(scsi_cmd, reslen);
2807 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2808 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2809 cmd->ioa_cb->ioarcb.cdb[0],
2810 ioasc, scsi_cmd->result);
2812 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2813 rc = pmcraid_error_handler(cmd);
2816 scsi_dma_unmap(scsi_cmd);
2817 scsi_cmd->scsi_done(scsi_cmd);
2824 * pmcraid_io_done - SCSI completion function
2826 * @cmd: pointer to pmcraid command struct
2828 * This function is invoked by tasklet/mid-layer error handler to completing
2829 * the SCSI ops sent from mid-layer.
2835 static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2837 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2838 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2840 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2841 pmcraid_return_cmd(cmd);
2845 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2847 * @cmd: command block of the command to be aborted
2850 * returns pointer to command structure used as cancelling cmd
2852 static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2854 struct pmcraid_cmd *cancel_cmd;
2855 struct pmcraid_instance *pinstance;
2857 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2859 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2861 if (cancel_cmd == NULL) {
2862 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2866 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2868 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2869 cmd->ioa_cb->ioarcb.cdb[0],
2870 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2872 init_completion(&cancel_cmd->wait_for_completion);
2873 cancel_cmd->completion_req = 1;
2875 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2876 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
2877 cancel_cmd->ioa_cb->ioarcb.cdb[0],
2878 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2880 pmcraid_send_cmd(cancel_cmd,
2881 pmcraid_internal_done,
2882 PMCRAID_INTERNAL_TIMEOUT,
2883 pmcraid_timeout_handler);
2888 * pmcraid_abort_complete - Waits for ABORT TASK completion
2890 * @cancel_cmd: command block use as cancelling command
2893 * returns SUCCESS if ABORT TASK has good completion
2896 static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2898 struct pmcraid_resource_entry *res;
2901 wait_for_completion(&cancel_cmd->wait_for_completion);
2902 res = cancel_cmd->res;
2903 cancel_cmd->res = NULL;
2904 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2906 /* If the abort task is not timed out we will get a Good completion
2907 * as sense_key, otherwise we may get one the following responses
2908 * due to subsequent bus reset or device reset. In case IOASC is
2909 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2911 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
2912 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
2913 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
2918 /* complete the command here itself */
2919 pmcraid_return_cmd(cancel_cmd);
2920 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2924 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
2926 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
2927 * mid-layer ensures that no other commands are queued. This
2928 * never gets called under interrupt, but a separate eh thread.
2933 static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
2935 struct pmcraid_instance *pinstance;
2936 struct pmcraid_cmd *cmd;
2937 struct pmcraid_resource_entry *res;
2938 unsigned long host_lock_flags;
2939 unsigned long pending_lock_flags;
2940 struct pmcraid_cmd *cancel_cmd = NULL;
2945 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2947 scmd_printk(KERN_INFO, scsi_cmd,
2948 "I/O command timed out, aborting it.\n");
2950 res = scsi_cmd->device->hostdata;
2955 /* If we are currently going through reset/reload, return failed.
2956 * This will force the mid-layer to eventually call
2957 * pmcraid_eh_host_reset which will then go to sleep and wait for the
2960 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
2962 if (pinstance->ioa_reset_in_progress ||
2963 pinstance->ioa_state == IOA_STATE_DEAD) {
2964 spin_unlock_irqrestore(pinstance->host->host_lock,
2969 /* loop over pending cmd list to find cmd corresponding to this
2970 * scsi_cmd. Note that this command might not have been completed
2971 * already. locking: all pending commands are protected with
2972 * pending_pool_lock.
2974 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
2975 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
2977 if (cmd->scsi_cmd == scsi_cmd) {
2983 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2984 pending_lock_flags);
2986 /* If the command to be aborted was given to IOA and still pending with
2987 * it, send ABORT_TASK to abort this and wait for its completion
2990 cancel_cmd = pmcraid_abort_cmd(cmd);
2992 spin_unlock_irqrestore(pinstance->host->host_lock,
2996 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
2997 rc = pmcraid_abort_complete(cancel_cmd);
3000 return cmd_found ? rc : SUCCESS;
3004 * pmcraid_eh_device_reset_handler - bus/target/device reset handler callbacks
3006 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3008 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3009 * Since these are called from mid-layer EH thread, no other IO will be queued
3010 * to the resource being reset. However, control path (IOCTL) may be active so
3011 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3012 * takes care by locking/unlocking host_lock.
3017 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3019 scmd_printk(KERN_INFO, scmd,
3020 "resetting device due to an I/O command timeout.\n");
3021 return pmcraid_reset_device(scmd,
3022 PMCRAID_INTERNAL_TIMEOUT,
3026 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3028 scmd_printk(KERN_INFO, scmd,
3029 "Doing bus reset due to an I/O command timeout.\n");
3030 return pmcraid_reset_device(scmd,
3031 PMCRAID_RESET_BUS_TIMEOUT,
3035 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3037 scmd_printk(KERN_INFO, scmd,
3038 "Doing target reset due to an I/O command timeout.\n");
3039 return pmcraid_reset_device(scmd,
3040 PMCRAID_INTERNAL_TIMEOUT,
3041 RESET_DEVICE_TARGET);
3045 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3047 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3049 * Initiates adapter reset to bring it up to operational state
3054 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3056 unsigned long interval = 10000; /* 10 seconds interval */
3057 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3058 struct pmcraid_instance *pinstance =
3059 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3062 /* wait for an additional 150 seconds just in case firmware could come
3063 * up and if it could complete all the pending commands excluding the
3064 * two HCAM (CCN and LDN).
3067 if (atomic_read(&pinstance->outstanding_cmds) <=
3068 PMCRAID_MAX_HCAM_CMD)
3073 dev_err(&pinstance->pdev->dev,
3074 "Adapter being reset due to an I/O command timeout.\n");
3075 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3079 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3080 * @cmd: pmcraid command struct
3081 * @sgcount: count of scatter-gather elements
3084 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3085 * or external IOADLs
3087 static struct pmcraid_ioadl_desc *
3088 pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3090 struct pmcraid_ioadl_desc *ioadl;
3091 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3092 int ioadl_count = 0;
3094 if (ioarcb->add_cmd_param_length)
3095 ioadl_count = DIV_ROUND_UP(le16_to_cpu(ioarcb->add_cmd_param_length), 16);
3096 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc) * sgcount);
3098 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3099 /* external ioadls start at offset 0x80 from control_block
3100 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3101 * It is necessary to indicate to firmware that driver is
3102 * using ioadls to be treated as external to IOARCB.
3104 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
3105 ioarcb->ioadl_bus_addr =
3106 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3107 offsetof(struct pmcraid_ioarcb,
3108 add_data.u.ioadl[3]));
3109 ioadl = &ioarcb->add_data.u.ioadl[3];
3111 ioarcb->ioadl_bus_addr =
3112 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3113 offsetof(struct pmcraid_ioarcb,
3114 add_data.u.ioadl[ioadl_count]));
3116 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3117 ioarcb->ioarcb_bus_addr |=
3118 cpu_to_le64(DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8));
3125 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3126 * @pinstance: pointer to adapter instance structure
3127 * @cmd: pmcraid command struct
3129 * This function is invoked by queuecommand entry point while sending a command
3130 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3133 * 0 on success or -1 on failure
3135 static int pmcraid_build_ioadl(
3136 struct pmcraid_instance *pinstance,
3137 struct pmcraid_cmd *cmd
3141 struct scatterlist *sglist;
3143 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3144 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3145 struct pmcraid_ioadl_desc *ioadl;
3147 u32 length = scsi_bufflen(scsi_cmd);
3152 nseg = scsi_dma_map(scsi_cmd);
3155 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
3157 } else if (nseg > PMCRAID_MAX_IOADLS) {
3158 scsi_dma_unmap(scsi_cmd);
3159 scmd_printk(KERN_ERR, scsi_cmd,
3160 "sg count is (%d) more than allowed!\n", nseg);
3164 /* Initialize IOARCB data transfer length fields */
3165 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3166 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3168 ioarcb->request_flags0 |= NO_LINK_DESCS;
3169 ioarcb->data_transfer_length = cpu_to_le32(length);
3170 ioadl = pmcraid_init_ioadls(cmd, nseg);
3172 /* Initialize IOADL descriptor addresses */
3173 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3174 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3175 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3178 /* setup last descriptor */
3179 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3185 * pmcraid_free_sglist - Frees an allocated SG buffer list
3186 * @sglist: scatter/gather list pointer
3188 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3193 static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3195 sgl_free_order(sglist->scatterlist, sglist->order);
3200 * pmcraid_alloc_sglist - Allocates memory for a SG list
3201 * @buflen: buffer length
3203 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3207 * pointer to sglist / NULL on failure
3209 static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3211 struct pmcraid_sglist *sglist;
3215 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3216 order = (sg_size > 0) ? get_order(sg_size) : 0;
3218 /* Allocate a scatter/gather list for the DMA */
3219 sglist = kzalloc(sizeof(struct pmcraid_sglist), GFP_KERNEL);
3223 sglist->order = order;
3224 sgl_alloc_order(buflen, order, false,
3225 GFP_KERNEL | GFP_DMA | __GFP_ZERO, &sglist->num_sg);
3231 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3232 * @sglist: scatter/gather list pointer
3233 * @buffer: buffer pointer
3234 * @len: buffer length
3235 * @direction: data transfer direction
3237 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3240 * 0 on success / other on failure
3242 static int pmcraid_copy_sglist(
3243 struct pmcraid_sglist *sglist,
3244 void __user *buffer,
3249 struct scatterlist *sg;
3255 /* Determine the actual number of bytes per element */
3256 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3258 sg = sglist->scatterlist;
3260 for (i = 0; i < (len / bsize_elem); i++, sg = sg_next(sg), buffer += bsize_elem) {
3261 struct page *page = sg_page(sg);
3264 if (direction == DMA_TO_DEVICE)
3265 rc = copy_from_user(kaddr, buffer, bsize_elem);
3267 rc = copy_to_user(buffer, kaddr, bsize_elem);
3272 pmcraid_err("failed to copy user data into sg list\n");
3276 sg->length = bsize_elem;
3279 if (len % bsize_elem) {
3280 struct page *page = sg_page(sg);
3284 if (direction == DMA_TO_DEVICE)
3285 rc = copy_from_user(kaddr, buffer, len % bsize_elem);
3287 rc = copy_to_user(buffer, kaddr, len % bsize_elem);
3291 sg->length = len % bsize_elem;
3295 pmcraid_err("failed to copy user data into sg list\n");
3303 * pmcraid_queuecommand_lck - Queue a mid-layer request
3304 * @scsi_cmd: scsi command struct
3305 * @done: done function
3307 * This function queues a request generated by the mid-layer. Midlayer calls
3308 * this routine within host->lock. Some of the functions called by queuecommand
3309 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3313 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3314 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3316 static int pmcraid_queuecommand_lck(
3317 struct scsi_cmnd *scsi_cmd,
3318 void (*done) (struct scsi_cmnd *)
3321 struct pmcraid_instance *pinstance;
3322 struct pmcraid_resource_entry *res;
3323 struct pmcraid_ioarcb *ioarcb;
3324 struct pmcraid_cmd *cmd;
3329 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3330 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3331 scsi_cmd->scsi_done = done;
3332 res = scsi_cmd->device->hostdata;
3333 scsi_cmd->result = (DID_OK << 16);
3335 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3338 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3339 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3340 scsi_cmd->result = (DID_NO_CONNECT << 16);
3341 scsi_cmd->scsi_done(scsi_cmd);
3345 /* If IOA reset is in progress, can't queue the commands */
3346 if (pinstance->ioa_reset_in_progress)
3347 return SCSI_MLQUEUE_HOST_BUSY;
3349 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3350 * the command here itself with success return
3352 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3353 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3354 scsi_cmd->scsi_done(scsi_cmd);
3358 /* initialize the command and IOARCB to be sent to IOA */
3359 cmd = pmcraid_get_free_cmd(pinstance);
3362 pmcraid_err("free command block is not available\n");
3363 return SCSI_MLQUEUE_HOST_BUSY;
3366 cmd->scsi_cmd = scsi_cmd;
3367 ioarcb = &(cmd->ioa_cb->ioarcb);
3368 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3369 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3370 ioarcb->request_type = REQ_TYPE_SCSI;
3372 /* set hrrq number where the IOA should respond to. Note that all cmds
3373 * generated internally uses hrrq_id 0, exception to this is the cmd
3374 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3375 * hrrq_id assigned here in queuecommand
3377 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3378 pinstance->num_hrrq;
3379 cmd->cmd_done = pmcraid_io_done;
3381 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3382 if (scsi_cmd->underflow == 0)
3383 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3385 if (res->sync_reqd) {
3386 ioarcb->request_flags0 |= SYNC_COMPLETE;
3390 ioarcb->request_flags0 |= NO_LINK_DESCS;
3392 if (scsi_cmd->flags & SCMD_TAGGED)
3393 ioarcb->request_flags1 |= TASK_TAG_SIMPLE;
3395 if (RES_IS_GSCSI(res->cfg_entry))
3396 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3399 rc = pmcraid_build_ioadl(pinstance, cmd);
3401 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3402 le32_to_cpu(ioarcb->response_handle) >> 2,
3403 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3404 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3405 PMCRAID_PHYS_BUS_ID,
3406 RES_IS_VSET(res->cfg_entry) ?
3407 (fw_version <= PMCRAID_FW_VERSION_1 ?
3408 res->cfg_entry.unique_flags1 :
3409 le16_to_cpu(res->cfg_entry.array_id) & 0xFF) :
3410 RES_TARGET(res->cfg_entry.resource_address),
3411 RES_LUN(res->cfg_entry.resource_address));
3413 if (likely(rc == 0)) {
3414 _pmcraid_fire_command(cmd);
3416 pmcraid_err("queuecommand could not build ioadl\n");
3417 pmcraid_return_cmd(cmd);
3418 rc = SCSI_MLQUEUE_HOST_BUSY;
3424 static DEF_SCSI_QCMD(pmcraid_queuecommand)
3427 * pmcraid_open -char node "open" entry, allowed only users with admin access
3429 static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3431 struct pmcraid_instance *pinstance;
3433 if (!capable(CAP_SYS_ADMIN))
3436 /* Populate adapter instance * pointer for use by ioctl */
3437 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3438 filep->private_data = pinstance;
3444 * pmcraid_fasync - Async notifier registration from applications
3446 * This function adds the calling process to a driver global queue. When an
3447 * event occurs, SIGIO will be sent to all processes in this queue.
3449 static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3451 struct pmcraid_instance *pinstance;
3454 pinstance = filep->private_data;
3455 mutex_lock(&pinstance->aen_queue_lock);
3456 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3457 mutex_unlock(&pinstance->aen_queue_lock);
3464 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3465 * commands sent over IOCTL interface
3467 * @cmd : pointer to struct pmcraid_cmd
3468 * @buflen : length of the request buffer
3469 * @direction : data transfer direction
3472 * 0 on success, non-zero error code on failure
3474 static int pmcraid_build_passthrough_ioadls(
3475 struct pmcraid_cmd *cmd,
3480 struct pmcraid_sglist *sglist = NULL;
3481 struct scatterlist *sg = NULL;
3482 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3483 struct pmcraid_ioadl_desc *ioadl;
3486 sglist = pmcraid_alloc_sglist(buflen);
3489 pmcraid_err("can't allocate memory for passthrough SGls\n");
3493 sglist->num_dma_sg = dma_map_sg(&cmd->drv_inst->pdev->dev,
3494 sglist->scatterlist,
3495 sglist->num_sg, direction);
3497 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3498 dev_err(&cmd->drv_inst->pdev->dev,
3499 "Failed to map passthrough buffer!\n");
3500 pmcraid_free_sglist(sglist);
3504 cmd->sglist = sglist;
3505 ioarcb->request_flags0 |= NO_LINK_DESCS;
3507 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3509 /* Initialize IOADL descriptor addresses */
3510 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3511 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3512 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3516 /* setup the last descriptor */
3517 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3524 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3526 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3527 * @buflen: size of the request buffer
3528 * @direction: data transfer direction
3531 * 0 on success, non-zero error code on failure
3533 static void pmcraid_release_passthrough_ioadls(
3534 struct pmcraid_cmd *cmd,
3539 struct pmcraid_sglist *sglist = cmd->sglist;
3542 dma_unmap_sg(&cmd->drv_inst->pdev->dev,
3543 sglist->scatterlist,
3546 pmcraid_free_sglist(sglist);
3552 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3554 * @pinstance: pointer to adapter instance structure
3555 * @ioctl_cmd: ioctl code
3557 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3560 * 0 on success, non-zero error code on failure
3562 static long pmcraid_ioctl_passthrough(
3563 struct pmcraid_instance *pinstance,
3564 unsigned int ioctl_cmd,
3565 unsigned int buflen,
3569 struct pmcraid_passthrough_ioctl_buffer *buffer;
3570 struct pmcraid_ioarcb *ioarcb;
3571 struct pmcraid_cmd *cmd;
3572 struct pmcraid_cmd *cancel_cmd;
3573 void __user *request_buffer;
3574 unsigned long request_offset;
3575 unsigned long lock_flags;
3583 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3584 if (pinstance->ioa_reset_in_progress) {
3585 rc = wait_event_interruptible_timeout(
3586 pinstance->reset_wait_q,
3587 !pinstance->ioa_reset_in_progress,
3588 msecs_to_jiffies(10000));
3593 return -ERESTARTSYS;
3596 /* If adapter is not in operational state, return error */
3597 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3598 pmcraid_err("IOA is not operational\n");
3602 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3603 buffer = kmalloc(buffer_size, GFP_KERNEL);
3606 pmcraid_err("no memory for passthrough buffer\n");
3611 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3613 request_buffer = arg + request_offset;
3615 rc = copy_from_user(buffer, arg,
3616 sizeof(struct pmcraid_passthrough_ioctl_buffer));
3618 ioasa = arg + offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa);
3621 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3623 goto out_free_buffer;
3626 request_size = le32_to_cpu(buffer->ioarcb.data_transfer_length);
3628 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3629 direction = DMA_TO_DEVICE;
3631 direction = DMA_FROM_DEVICE;
3634 if (request_size < 0) {
3636 goto out_free_buffer;
3639 /* check if we have any additional command parameters */
3640 if (le16_to_cpu(buffer->ioarcb.add_cmd_param_length)
3641 > PMCRAID_ADD_CMD_PARAM_LEN) {
3643 goto out_free_buffer;
3646 cmd = pmcraid_get_free_cmd(pinstance);
3649 pmcraid_err("free command block is not available\n");
3651 goto out_free_buffer;
3654 cmd->scsi_cmd = NULL;
3655 ioarcb = &(cmd->ioa_cb->ioarcb);
3657 /* Copy the user-provided IOARCB stuff field by field */
3658 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3659 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3660 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3661 ioarcb->request_type = buffer->ioarcb.request_type;
3662 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3663 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3664 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3666 if (buffer->ioarcb.add_cmd_param_length) {
3667 ioarcb->add_cmd_param_length =
3668 buffer->ioarcb.add_cmd_param_length;
3669 ioarcb->add_cmd_param_offset =
3670 buffer->ioarcb.add_cmd_param_offset;
3671 memcpy(ioarcb->add_data.u.add_cmd_params,
3672 buffer->ioarcb.add_data.u.add_cmd_params,
3673 le16_to_cpu(buffer->ioarcb.add_cmd_param_length));
3676 /* set hrrq number where the IOA should respond to. Note that all cmds
3677 * generated internally uses hrrq_id 0, exception to this is the cmd
3678 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3679 * hrrq_id assigned here in queuecommand
3681 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3682 pinstance->num_hrrq;
3685 rc = pmcraid_build_passthrough_ioadls(cmd,
3689 pmcraid_err("couldn't build passthrough ioadls\n");
3694 /* If data is being written into the device, copy the data from user
3697 if (direction == DMA_TO_DEVICE && request_size > 0) {
3698 rc = pmcraid_copy_sglist(cmd->sglist,
3703 pmcraid_err("failed to copy user buffer\n");
3704 goto out_free_sglist;
3708 /* passthrough ioctl is a blocking command so, put the user to sleep
3709 * until timeout. Note that a timeout value of 0 means, do timeout.
3711 cmd->cmd_done = pmcraid_internal_done;
3712 init_completion(&cmd->wait_for_completion);
3713 cmd->completion_req = 1;
3715 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3716 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3717 cmd->ioa_cb->ioarcb.cdb[0],
3718 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3720 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3721 _pmcraid_fire_command(cmd);
3722 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3724 /* NOTE ! Remove the below line once abort_task is implemented
3725 * in firmware. This line disables ioctl command timeout handling logic
3726 * similar to IO command timeout handling, making ioctl commands to wait
3727 * until the command completion regardless of timeout value specified in
3730 buffer->ioarcb.cmd_timeout = 0;
3732 /* If command timeout is specified put caller to wait till that time,
3733 * otherwise it would be blocking wait. If command gets timed out, it
3736 if (buffer->ioarcb.cmd_timeout == 0) {
3737 wait_for_completion(&cmd->wait_for_completion);
3738 } else if (!wait_for_completion_timeout(
3739 &cmd->wait_for_completion,
3740 msecs_to_jiffies(le16_to_cpu(buffer->ioarcb.cmd_timeout) * 1000))) {
3742 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3743 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3744 cmd->ioa_cb->ioarcb.cdb[0]);
3746 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3747 cancel_cmd = pmcraid_abort_cmd(cmd);
3748 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3751 wait_for_completion(&cancel_cmd->wait_for_completion);
3752 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
3753 pmcraid_return_cmd(cancel_cmd);
3755 /* if abort task couldn't find the command i.e it got
3756 * completed prior to aborting, return good completion.
3757 * if command got aborted successfully or there was IOA
3758 * reset due to abort task itself getting timedout then
3761 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3762 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3763 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3765 goto out_handle_response;
3769 /* no command block for abort task or abort task failed to abort
3770 * the IOARCB, then wait for 150 more seconds and initiate reset
3771 * sequence after timeout
3773 if (!wait_for_completion_timeout(
3774 &cmd->wait_for_completion,
3775 msecs_to_jiffies(150 * 1000))) {
3776 pmcraid_reset_bringup(cmd->drv_inst);
3781 out_handle_response:
3782 /* copy entire IOASA buffer and return IOCTL success.
3783 * If copying IOASA to user-buffer fails, return
3786 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3787 sizeof(struct pmcraid_ioasa))) {
3788 pmcraid_err("failed to copy ioasa buffer to user\n");
3792 /* If the data transfer was from device, copy the data onto user
3795 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3796 rc = pmcraid_copy_sglist(cmd->sglist,
3801 pmcraid_err("failed to copy user buffer\n");
3807 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3810 pmcraid_return_cmd(cmd);
3822 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3824 * @pinstance: pointer to adapter instance structure
3825 * @cmd: ioctl command passed in
3826 * @buflen: length of user_buffer
3827 * @user_buffer: user buffer pointer
3830 * 0 in case of success, otherwise appropriate error code
3832 static long pmcraid_ioctl_driver(
3833 struct pmcraid_instance *pinstance,
3835 unsigned int buflen,
3836 void __user *user_buffer
3842 case PMCRAID_IOCTL_RESET_ADAPTER:
3843 pmcraid_reset_bringup(pinstance);
3855 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
3857 * @cmd: ioctl command
3859 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
3862 * negetive error code if there are access issues, otherwise zero.
3863 * Upon success, returns ioctl header copied out of user buffer.
3866 static int pmcraid_check_ioctl_buffer(
3869 struct pmcraid_ioctl_header *hdr
3874 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
3875 pmcraid_err("couldn't copy ioctl header from user buffer\n");
3879 /* check for valid driver signature */
3880 rc = memcmp(hdr->signature,
3881 PMCRAID_IOCTL_SIGNATURE,
3882 sizeof(hdr->signature));
3884 pmcraid_err("signature verification failed\n");
3892 * pmcraid_ioctl - char node ioctl entry point
3894 static long pmcraid_chr_ioctl(
3900 struct pmcraid_instance *pinstance = NULL;
3901 struct pmcraid_ioctl_header *hdr = NULL;
3902 void __user *argp = (void __user *)arg;
3903 int retval = -ENOTTY;
3905 hdr = kmalloc(sizeof(struct pmcraid_ioctl_header), GFP_KERNEL);
3908 pmcraid_err("failed to allocate memory for ioctl header\n");
3912 retval = pmcraid_check_ioctl_buffer(cmd, argp, hdr);
3915 pmcraid_info("chr_ioctl: header check failed\n");
3920 pinstance = filep->private_data;
3923 pmcraid_info("adapter instance is not found\n");
3928 switch (_IOC_TYPE(cmd)) {
3930 case PMCRAID_PASSTHROUGH_IOCTL:
3931 /* If ioctl code is to download microcode, we need to block
3932 * mid-layer requests.
3934 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
3935 scsi_block_requests(pinstance->host);
3937 retval = pmcraid_ioctl_passthrough(pinstance, cmd,
3938 hdr->buffer_length, argp);
3940 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
3941 scsi_unblock_requests(pinstance->host);
3944 case PMCRAID_DRIVER_IOCTL:
3945 arg += sizeof(struct pmcraid_ioctl_header);
3946 retval = pmcraid_ioctl_driver(pinstance, cmd,
3947 hdr->buffer_length, argp);
3961 * File operations structure for management interface
3963 static const struct file_operations pmcraid_fops = {
3964 .owner = THIS_MODULE,
3965 .open = pmcraid_chr_open,
3966 .fasync = pmcraid_chr_fasync,
3967 .unlocked_ioctl = pmcraid_chr_ioctl,
3968 .compat_ioctl = compat_ptr_ioctl,
3969 .llseek = noop_llseek,
3976 * pmcraid_show_log_level - Display adapter's error logging level
3977 * @dev: class device struct
3982 * number of bytes printed to buffer
3984 static ssize_t pmcraid_show_log_level(
3986 struct device_attribute *attr,
3989 struct Scsi_Host *shost = class_to_shost(dev);
3990 struct pmcraid_instance *pinstance =
3991 (struct pmcraid_instance *)shost->hostdata;
3992 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
3996 * pmcraid_store_log_level - Change the adapter's error logging level
3997 * @dev: class device struct
4003 * number of bytes printed to buffer
4005 static ssize_t pmcraid_store_log_level(
4007 struct device_attribute *attr,
4012 struct Scsi_Host *shost;
4013 struct pmcraid_instance *pinstance;
4016 if (kstrtou8(buf, 10, &val))
4018 /* log-level should be from 0 to 2 */
4022 shost = class_to_shost(dev);
4023 pinstance = (struct pmcraid_instance *)shost->hostdata;
4024 pinstance->current_log_level = val;
4029 static struct device_attribute pmcraid_log_level_attr = {
4031 .name = "log_level",
4032 .mode = S_IRUGO | S_IWUSR,
4034 .show = pmcraid_show_log_level,
4035 .store = pmcraid_store_log_level,
4039 * pmcraid_show_drv_version - Display driver version
4040 * @dev: class device struct
4045 * number of bytes printed to buffer
4047 static ssize_t pmcraid_show_drv_version(
4049 struct device_attribute *attr,
4053 return snprintf(buf, PAGE_SIZE, "version: %s\n",
4054 PMCRAID_DRIVER_VERSION);
4057 static struct device_attribute pmcraid_driver_version_attr = {
4059 .name = "drv_version",
4062 .show = pmcraid_show_drv_version,
4066 * pmcraid_show_adapter_id - Display driver assigned adapter id
4067 * @dev: class device struct
4072 * number of bytes printed to buffer
4074 static ssize_t pmcraid_show_adapter_id(
4076 struct device_attribute *attr,
4080 struct Scsi_Host *shost = class_to_shost(dev);
4081 struct pmcraid_instance *pinstance =
4082 (struct pmcraid_instance *)shost->hostdata;
4083 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4084 pinstance->pdev->devfn;
4085 u32 aen_group = pmcraid_event_family.id;
4087 return snprintf(buf, PAGE_SIZE,
4088 "adapter id: %d\nminor: %d\naen group: %d\n",
4089 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4092 static struct device_attribute pmcraid_adapter_id_attr = {
4094 .name = "adapter_id",
4097 .show = pmcraid_show_adapter_id,
4100 static struct device_attribute *pmcraid_host_attrs[] = {
4101 &pmcraid_log_level_attr,
4102 &pmcraid_driver_version_attr,
4103 &pmcraid_adapter_id_attr,
4108 /* host template structure for pmcraid driver */
4109 static struct scsi_host_template pmcraid_host_template = {
4110 .module = THIS_MODULE,
4111 .name = PMCRAID_DRIVER_NAME,
4112 .queuecommand = pmcraid_queuecommand,
4113 .eh_abort_handler = pmcraid_eh_abort_handler,
4114 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4115 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4116 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4117 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4119 .slave_alloc = pmcraid_slave_alloc,
4120 .slave_configure = pmcraid_slave_configure,
4121 .slave_destroy = pmcraid_slave_destroy,
4122 .change_queue_depth = pmcraid_change_queue_depth,
4123 .can_queue = PMCRAID_MAX_IO_CMD,
4125 .sg_tablesize = PMCRAID_MAX_IOADLS,
4126 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4128 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4129 .shost_attrs = pmcraid_host_attrs,
4130 .proc_name = PMCRAID_DRIVER_NAME,
4134 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4135 * @irq: interrupt vector number
4136 * @dev_id: pointer hrrq_vector
4139 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4142 static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
4144 struct pmcraid_isr_param *hrrq_vector;
4145 struct pmcraid_instance *pinstance;
4146 unsigned long lock_flags;
4150 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4151 hrrq_id = hrrq_vector->hrrq_id;
4152 pinstance = hrrq_vector->drv_inst;
4155 /* Read the interrupt */
4156 intrs_val = pmcraid_read_interrupts(pinstance);
4158 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4159 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4160 /* Any error interrupts including unit_check,
4161 * initiate IOA reset.In case of unit check indicate
4162 * to reset_sequence that IOA unit checked and prepare
4163 * for a dump during reset sequence
4165 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4166 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4167 pinstance->ioa_unit_check = 1;
4169 pmcraid_err("ISR: error interrupts: %x \
4170 initiating reset\n", intrs_val);
4171 spin_lock_irqsave(pinstance->host->host_lock,
4173 pmcraid_initiate_reset(pinstance);
4174 spin_unlock_irqrestore(
4175 pinstance->host->host_lock,
4178 /* If interrupt was as part of the ioa initialization,
4179 * clear it. Delete the timer and wakeup the
4180 * reset engine to proceed with reset sequence
4182 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4183 pmcraid_clr_trans_op(pinstance);
4185 /* Clear the interrupt register by writing
4186 * to host to ioa doorbell. Once done
4187 * FW will clear the interrupt.
4189 iowrite32(DOORBELL_INTR_MSIX_CLR,
4190 pinstance->int_regs.host_ioa_interrupt_reg);
4191 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4197 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4203 * pmcraid_isr - implements legacy interrupt handling routine
4205 * @irq: interrupt vector number
4206 * @dev_id: pointer hrrq_vector
4209 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4211 static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4213 struct pmcraid_isr_param *hrrq_vector;
4214 struct pmcraid_instance *pinstance;
4216 unsigned long lock_flags;
4219 /* In case of legacy interrupt mode where interrupts are shared across
4220 * isrs, it may be possible that the current interrupt is not from IOA
4223 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4226 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4227 pinstance = hrrq_vector->drv_inst;
4229 intrs = pmcraid_read_interrupts(pinstance);
4231 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
4234 /* Any error interrupts including unit_check, initiate IOA reset.
4235 * In case of unit check indicate to reset_sequence that IOA unit
4236 * checked and prepare for a dump during reset sequence
4238 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4240 if (intrs & INTRS_IOA_UNIT_CHECK)
4241 pinstance->ioa_unit_check = 1;
4244 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4245 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4248 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4249 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
4250 pmcraid_initiate_reset(pinstance);
4251 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
4253 /* If interrupt was as part of the ioa initialization,
4254 * clear. Delete the timer and wakeup the
4255 * reset engine to proceed with reset sequence
4257 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4258 pmcraid_clr_trans_op(pinstance);
4261 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4263 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4266 &(pinstance->isr_tasklet[hrrq_id]));
4275 * pmcraid_worker_function - worker thread function
4277 * @workp: pointer to struct work queue
4283 static void pmcraid_worker_function(struct work_struct *workp)
4285 struct pmcraid_instance *pinstance;
4286 struct pmcraid_resource_entry *res;
4287 struct pmcraid_resource_entry *temp;
4288 struct scsi_device *sdev;
4289 unsigned long lock_flags;
4290 unsigned long host_lock_flags;
4292 u8 bus, target, lun;
4294 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4295 /* add resources only after host is added into system */
4296 if (!atomic_read(&pinstance->expose_resources))
4299 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4301 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4302 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4304 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4305 sdev = res->scsi_dev;
4307 /* host_lock must be held before calling
4310 spin_lock_irqsave(pinstance->host->host_lock,
4312 if (!scsi_device_get(sdev)) {
4313 spin_unlock_irqrestore(
4314 pinstance->host->host_lock,
4316 pmcraid_info("deleting %x from midlayer\n",
4317 res->cfg_entry.resource_address);
4318 list_move_tail(&res->queue,
4319 &pinstance->free_res_q);
4320 spin_unlock_irqrestore(
4321 &pinstance->resource_lock,
4323 scsi_remove_device(sdev);
4324 scsi_device_put(sdev);
4325 spin_lock_irqsave(&pinstance->resource_lock,
4327 res->change_detected = 0;
4329 spin_unlock_irqrestore(
4330 pinstance->host->host_lock,
4336 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4338 if (res->change_detected == RES_CHANGE_ADD) {
4340 if (!pmcraid_expose_resource(fw_version,
4344 if (RES_IS_VSET(res->cfg_entry)) {
4345 bus = PMCRAID_VSET_BUS_ID;
4346 if (fw_version <= PMCRAID_FW_VERSION_1)
4347 target = res->cfg_entry.unique_flags1;
4349 target = le16_to_cpu(res->cfg_entry.array_id) & 0xFF;
4350 lun = PMCRAID_VSET_LUN_ID;
4352 bus = PMCRAID_PHYS_BUS_ID;
4355 res->cfg_entry.resource_address);
4356 lun = RES_LUN(res->cfg_entry.resource_address);
4359 res->change_detected = 0;
4360 spin_unlock_irqrestore(&pinstance->resource_lock,
4362 scsi_add_device(pinstance->host, bus, target, lun);
4363 spin_lock_irqsave(&pinstance->resource_lock,
4368 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4372 * pmcraid_tasklet_function - Tasklet function
4374 * @instance: pointer to msix param structure
4379 static void pmcraid_tasklet_function(unsigned long instance)
4381 struct pmcraid_isr_param *hrrq_vector;
4382 struct pmcraid_instance *pinstance;
4383 unsigned long hrrq_lock_flags;
4384 unsigned long pending_lock_flags;
4385 unsigned long host_lock_flags;
4386 spinlock_t *lockp; /* hrrq buffer lock */
4390 hrrq_vector = (struct pmcraid_isr_param *)instance;
4391 pinstance = hrrq_vector->drv_inst;
4392 id = hrrq_vector->hrrq_id;
4393 lockp = &(pinstance->hrrq_lock[id]);
4395 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4396 * protected by its own lock. Traversals must be done within this lock
4397 * as there may be multiple tasklets running on multiple CPUs. Note
4398 * that the lock is held just for picking up the response handle and
4399 * manipulating hrrq_curr/toggle_bit values.
4401 spin_lock_irqsave(lockp, hrrq_lock_flags);
4403 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4405 while ((resp & HRRQ_TOGGLE_BIT) ==
4406 pinstance->host_toggle_bit[id]) {
4408 int cmd_index = resp >> 2;
4409 struct pmcraid_cmd *cmd = NULL;
4411 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4412 pinstance->hrrq_curr[id]++;
4414 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4415 pinstance->host_toggle_bit[id] ^= 1u;
4418 if (cmd_index >= PMCRAID_MAX_CMD) {
4419 /* In case of invalid response handle, log message */
4420 pmcraid_err("Invalid response handle %d\n", cmd_index);
4421 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4425 cmd = pinstance->cmd_list[cmd_index];
4426 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4428 spin_lock_irqsave(&pinstance->pending_pool_lock,
4429 pending_lock_flags);
4430 list_del(&cmd->free_list);
4431 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4432 pending_lock_flags);
4433 del_timer(&cmd->timer);
4434 atomic_dec(&pinstance->outstanding_cmds);
4436 if (cmd->cmd_done == pmcraid_ioa_reset) {
4437 spin_lock_irqsave(pinstance->host->host_lock,
4440 spin_unlock_irqrestore(pinstance->host->host_lock,
4442 } else if (cmd->cmd_done != NULL) {
4445 /* loop over until we are done with all responses */
4446 spin_lock_irqsave(lockp, hrrq_lock_flags);
4447 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4450 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4454 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4455 * @pinstance: pointer to adapter instance structure
4457 * This routine un-registers registered interrupt handler and
4458 * also frees irqs/vectors.
4464 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4466 struct pci_dev *pdev = pinstance->pdev;
4469 for (i = 0; i < pinstance->num_hrrq; i++)
4470 free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
4472 pinstance->interrupt_mode = 0;
4473 pci_free_irq_vectors(pdev);
4477 * pmcraid_register_interrupt_handler - registers interrupt handler
4478 * @pinstance: pointer to per-adapter instance structure
4481 * 0 on success, non-zero error code otherwise.
4484 pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4486 struct pci_dev *pdev = pinstance->pdev;
4487 unsigned int irq_flag = PCI_IRQ_LEGACY, flag;
4488 int num_hrrq, rc, i;
4491 if (pmcraid_enable_msix)
4492 irq_flag |= PCI_IRQ_MSIX;
4494 num_hrrq = pci_alloc_irq_vectors(pdev, 1, PMCRAID_NUM_MSIX_VECTORS,
4499 if (pdev->msix_enabled) {
4501 isr = pmcraid_isr_msix;
4507 for (i = 0; i < num_hrrq; i++) {
4508 struct pmcraid_isr_param *vec = &pinstance->hrrq_vector[i];
4511 vec->drv_inst = pinstance;
4512 rc = request_irq(pci_irq_vector(pdev, i), isr, flag,
4513 PMCRAID_DRIVER_NAME, vec);
4518 pinstance->num_hrrq = num_hrrq;
4519 if (pdev->msix_enabled) {
4520 pinstance->interrupt_mode = 1;
4521 iowrite32(DOORBELL_INTR_MODE_MSIX,
4522 pinstance->int_regs.host_ioa_interrupt_reg);
4523 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4530 free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
4531 pci_free_irq_vectors(pdev);
4536 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4537 * @pinstance: per adapter instance structure pointer
4538 * @max_index: number of buffer blocks to release
4544 pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4547 for (i = 0; i < max_index; i++) {
4548 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4549 pinstance->cmd_list[i] = NULL;
4551 kmem_cache_destroy(pinstance->cmd_cachep);
4552 pinstance->cmd_cachep = NULL;
4556 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4557 * @pinstance: pointer to per adapter instance structure
4558 * @max_index: number of buffers (from 0 onwards) to release
4560 * This function assumes that the command blocks for which control blocks are
4561 * linked are not released.
4567 pmcraid_release_control_blocks(
4568 struct pmcraid_instance *pinstance,
4574 if (pinstance->control_pool == NULL)
4577 for (i = 0; i < max_index; i++) {
4578 dma_pool_free(pinstance->control_pool,
4579 pinstance->cmd_list[i]->ioa_cb,
4580 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4581 pinstance->cmd_list[i]->ioa_cb = NULL;
4582 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4584 dma_pool_destroy(pinstance->control_pool);
4585 pinstance->control_pool = NULL;
4589 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4590 * @pinstance: pointer to per adapter instance structure
4592 * Allocates memory for command blocks using kernel slab allocator.
4595 * 0 in case of success; -ENOMEM in case of failure
4597 static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4601 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4602 pinstance->host->unique_id);
4605 pinstance->cmd_cachep = kmem_cache_create(
4606 pinstance->cmd_pool_name,
4607 sizeof(struct pmcraid_cmd), 0,
4608 SLAB_HWCACHE_ALIGN, NULL);
4609 if (!pinstance->cmd_cachep)
4612 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4613 pinstance->cmd_list[i] =
4614 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4615 if (!pinstance->cmd_list[i]) {
4616 pmcraid_release_cmd_blocks(pinstance, i);
4624 * pmcraid_allocate_control_blocks - allocates memory control blocks
4625 * @pinstance : pointer to per adapter instance structure
4627 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4628 * and IOASAs. This is called after command blocks are already allocated.
4631 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4633 static int pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4637 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4638 pinstance->host->unique_id);
4640 pinstance->control_pool =
4641 dma_pool_create(pinstance->ctl_pool_name,
4642 &pinstance->pdev->dev,
4643 sizeof(struct pmcraid_control_block),
4644 PMCRAID_IOARCB_ALIGNMENT, 0);
4646 if (!pinstance->control_pool)
4649 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4650 pinstance->cmd_list[i]->ioa_cb =
4652 pinstance->control_pool,
4654 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4656 if (!pinstance->cmd_list[i]->ioa_cb) {
4657 pmcraid_release_control_blocks(pinstance, i);
4665 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4666 * @pinstance: pointer to per adapter instance structure
4667 * @maxindex: size of hrrq buffer pointer array
4673 pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4677 for (i = 0; i < maxindex; i++) {
4678 dma_free_coherent(&pinstance->pdev->dev,
4679 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4680 pinstance->hrrq_start[i],
4681 pinstance->hrrq_start_bus_addr[i]);
4683 /* reset pointers and toggle bit to zeros */
4684 pinstance->hrrq_start[i] = NULL;
4685 pinstance->hrrq_start_bus_addr[i] = 0;
4686 pinstance->host_toggle_bit[i] = 0;
4691 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4692 * @pinstance: pointer to per adapter instance structure
4695 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4697 static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4701 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4703 for (i = 0; i < pinstance->num_hrrq; i++) {
4704 pinstance->hrrq_start[i] =
4705 dma_alloc_coherent(&pinstance->pdev->dev, buffer_size,
4706 &pinstance->hrrq_start_bus_addr[i],
4708 if (!pinstance->hrrq_start[i]) {
4709 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4711 pmcraid_release_host_rrqs(pinstance, i);
4715 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4716 pinstance->hrrq_end[i] =
4717 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4718 pinstance->host_toggle_bit[i] = 1;
4719 spin_lock_init(&pinstance->hrrq_lock[i]);
4725 * pmcraid_release_hcams - release HCAM buffers
4727 * @pinstance: pointer to per adapter instance structure
4732 static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4734 if (pinstance->ccn.msg != NULL) {
4735 dma_free_coherent(&pinstance->pdev->dev,
4736 PMCRAID_AEN_HDR_SIZE +
4737 sizeof(struct pmcraid_hcam_ccn_ext),
4739 pinstance->ccn.baddr);
4741 pinstance->ccn.msg = NULL;
4742 pinstance->ccn.hcam = NULL;
4743 pinstance->ccn.baddr = 0;
4746 if (pinstance->ldn.msg != NULL) {
4747 dma_free_coherent(&pinstance->pdev->dev,
4748 PMCRAID_AEN_HDR_SIZE +
4749 sizeof(struct pmcraid_hcam_ldn),
4751 pinstance->ldn.baddr);
4753 pinstance->ldn.msg = NULL;
4754 pinstance->ldn.hcam = NULL;
4755 pinstance->ldn.baddr = 0;
4760 * pmcraid_allocate_hcams - allocates HCAM buffers
4761 * @pinstance : pointer to per adapter instance structure
4764 * 0 in case of successful allocation, non-zero otherwise
4766 static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
4768 pinstance->ccn.msg = dma_alloc_coherent(&pinstance->pdev->dev,
4769 PMCRAID_AEN_HDR_SIZE +
4770 sizeof(struct pmcraid_hcam_ccn_ext),
4771 &pinstance->ccn.baddr, GFP_KERNEL);
4773 pinstance->ldn.msg = dma_alloc_coherent(&pinstance->pdev->dev,
4774 PMCRAID_AEN_HDR_SIZE +
4775 sizeof(struct pmcraid_hcam_ldn),
4776 &pinstance->ldn.baddr, GFP_KERNEL);
4778 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
4779 pmcraid_release_hcams(pinstance);
4781 pinstance->ccn.hcam =
4782 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
4783 pinstance->ldn.hcam =
4784 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
4786 atomic_set(&pinstance->ccn.ignore, 0);
4787 atomic_set(&pinstance->ldn.ignore, 0);
4790 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
4794 * pmcraid_release_config_buffers - release config.table buffers
4795 * @pinstance: pointer to per adapter instance structure
4800 static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
4802 if (pinstance->cfg_table != NULL &&
4803 pinstance->cfg_table_bus_addr != 0) {
4804 dma_free_coherent(&pinstance->pdev->dev,
4805 sizeof(struct pmcraid_config_table),
4806 pinstance->cfg_table,
4807 pinstance->cfg_table_bus_addr);
4808 pinstance->cfg_table = NULL;
4809 pinstance->cfg_table_bus_addr = 0;
4812 if (pinstance->res_entries != NULL) {
4815 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
4816 list_del(&pinstance->res_entries[i].queue);
4817 kfree(pinstance->res_entries);
4818 pinstance->res_entries = NULL;
4821 pmcraid_release_hcams(pinstance);
4825 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
4826 * @pinstance : pointer to per adapter instance structure
4829 * 0 for successful allocation, -ENOMEM for any failure
4831 static int pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
4835 pinstance->res_entries =
4836 kcalloc(PMCRAID_MAX_RESOURCES,
4837 sizeof(struct pmcraid_resource_entry),
4840 if (NULL == pinstance->res_entries) {
4841 pmcraid_err("failed to allocate memory for resource table\n");
4845 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
4846 list_add_tail(&pinstance->res_entries[i].queue,
4847 &pinstance->free_res_q);
4849 pinstance->cfg_table = dma_alloc_coherent(&pinstance->pdev->dev,
4850 sizeof(struct pmcraid_config_table),
4851 &pinstance->cfg_table_bus_addr,
4854 if (NULL == pinstance->cfg_table) {
4855 pmcraid_err("couldn't alloc DMA memory for config table\n");
4856 pmcraid_release_config_buffers(pinstance);
4860 if (pmcraid_allocate_hcams(pinstance)) {
4861 pmcraid_err("could not alloc DMA memory for HCAMS\n");
4862 pmcraid_release_config_buffers(pinstance);
4870 * pmcraid_init_tasklets - registers tasklets for response handling
4872 * @pinstance: pointer adapter instance structure
4877 static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
4880 for (i = 0; i < pinstance->num_hrrq; i++)
4881 tasklet_init(&pinstance->isr_tasklet[i],
4882 pmcraid_tasklet_function,
4883 (unsigned long)&pinstance->hrrq_vector[i]);
4887 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
4889 * @pinstance: pointer to adapter instance structure
4894 static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
4897 for (i = 0; i < pinstance->num_hrrq; i++)
4898 tasklet_kill(&pinstance->isr_tasklet[i]);
4902 * pmcraid_release_buffers - release per-adapter buffers allocated
4904 * @pinstance: pointer to adapter soft state
4909 static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
4911 pmcraid_release_config_buffers(pinstance);
4912 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
4913 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
4914 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4916 if (pinstance->inq_data != NULL) {
4917 dma_free_coherent(&pinstance->pdev->dev,
4918 sizeof(struct pmcraid_inquiry_data),
4919 pinstance->inq_data,
4920 pinstance->inq_data_baddr);
4922 pinstance->inq_data = NULL;
4923 pinstance->inq_data_baddr = 0;
4926 if (pinstance->timestamp_data != NULL) {
4927 dma_free_coherent(&pinstance->pdev->dev,
4928 sizeof(struct pmcraid_timestamp_data),
4929 pinstance->timestamp_data,
4930 pinstance->timestamp_data_baddr);
4932 pinstance->timestamp_data = NULL;
4933 pinstance->timestamp_data_baddr = 0;
4938 * pmcraid_init_buffers - allocates memory and initializes various structures
4939 * @pinstance: pointer to per adapter instance structure
4941 * This routine pre-allocates memory based on the type of block as below:
4942 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
4943 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
4944 * config-table entries : DMAable memory using dma_alloc_coherent
4945 * HostRRQs : DMAable memory, using dma_alloc_coherent
4948 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
4950 static int pmcraid_init_buffers(struct pmcraid_instance *pinstance)
4954 if (pmcraid_allocate_host_rrqs(pinstance)) {
4955 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
4956 pinstance->num_hrrq);
4960 if (pmcraid_allocate_config_buffers(pinstance)) {
4961 pmcraid_err("couldn't allocate memory for config buffers\n");
4962 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4966 if (pmcraid_allocate_cmd_blocks(pinstance)) {
4967 pmcraid_err("couldn't allocate memory for cmd blocks\n");
4968 pmcraid_release_config_buffers(pinstance);
4969 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4973 if (pmcraid_allocate_control_blocks(pinstance)) {
4974 pmcraid_err("couldn't allocate memory control blocks\n");
4975 pmcraid_release_config_buffers(pinstance);
4976 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
4977 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4981 /* allocate DMAable memory for page D0 INQUIRY buffer */
4982 pinstance->inq_data = dma_alloc_coherent(&pinstance->pdev->dev,
4983 sizeof(struct pmcraid_inquiry_data),
4984 &pinstance->inq_data_baddr, GFP_KERNEL);
4985 if (pinstance->inq_data == NULL) {
4986 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
4987 pmcraid_release_buffers(pinstance);
4991 /* allocate DMAable memory for set timestamp data buffer */
4992 pinstance->timestamp_data = dma_alloc_coherent(&pinstance->pdev->dev,
4993 sizeof(struct pmcraid_timestamp_data),
4994 &pinstance->timestamp_data_baddr,
4996 if (pinstance->timestamp_data == NULL) {
4997 pmcraid_err("couldn't allocate DMA memory for \
4998 set time_stamp \n");
4999 pmcraid_release_buffers(pinstance);
5004 /* Initialize all the command blocks and add them to free pool. No
5005 * need to lock (free_pool_lock) as this is done in initialization
5008 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5009 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5010 pmcraid_init_cmdblk(cmdp, i);
5011 cmdp->drv_inst = pinstance;
5012 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5019 * pmcraid_reinit_buffers - resets various buffer pointers
5020 * @pinstance: pointer to adapter instance
5024 static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5027 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5029 for (i = 0; i < pinstance->num_hrrq; i++) {
5030 memset(pinstance->hrrq_start[i], 0, buffer_size);
5031 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5032 pinstance->hrrq_end[i] =
5033 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5034 pinstance->host_toggle_bit[i] = 1;
5039 * pmcraid_init_instance - initialize per instance data structure
5040 * @pdev: pointer to pci device structure
5041 * @host: pointer to Scsi_Host structure
5042 * @mapped_pci_addr: memory mapped IOA configuration registers
5045 * 0 on success, non-zero in case of any failure
5047 static int pmcraid_init_instance(struct pci_dev *pdev, struct Scsi_Host *host,
5048 void __iomem *mapped_pci_addr)
5050 struct pmcraid_instance *pinstance =
5051 (struct pmcraid_instance *)host->hostdata;
5053 pinstance->host = host;
5054 pinstance->pdev = pdev;
5056 /* Initialize register addresses */
5057 pinstance->mapped_dma_addr = mapped_pci_addr;
5059 /* Initialize chip-specific details */
5061 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5062 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5064 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5066 pint_regs->ioa_host_interrupt_reg =
5067 mapped_pci_addr + chip_cfg->ioa_host_intr;
5068 pint_regs->ioa_host_interrupt_clr_reg =
5069 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
5070 pint_regs->ioa_host_msix_interrupt_reg =
5071 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
5072 pint_regs->host_ioa_interrupt_reg =
5073 mapped_pci_addr + chip_cfg->host_ioa_intr;
5074 pint_regs->host_ioa_interrupt_clr_reg =
5075 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5077 /* Current version of firmware exposes interrupt mask set
5078 * and mask clr registers through memory mapped bar0.
5080 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5081 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5082 pint_regs->ioa_host_interrupt_mask_reg =
5083 mapped_pci_addr + chip_cfg->ioa_host_mask;
5084 pint_regs->ioa_host_interrupt_mask_clr_reg =
5085 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5086 pint_regs->global_interrupt_mask_reg =
5087 mapped_pci_addr + chip_cfg->global_intr_mask;
5090 pinstance->ioa_reset_attempts = 0;
5091 init_waitqueue_head(&pinstance->reset_wait_q);
5093 atomic_set(&pinstance->outstanding_cmds, 0);
5094 atomic_set(&pinstance->last_message_id, 0);
5095 atomic_set(&pinstance->expose_resources, 0);
5097 INIT_LIST_HEAD(&pinstance->free_res_q);
5098 INIT_LIST_HEAD(&pinstance->used_res_q);
5099 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5100 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5102 spin_lock_init(&pinstance->free_pool_lock);
5103 spin_lock_init(&pinstance->pending_pool_lock);
5104 spin_lock_init(&pinstance->resource_lock);
5105 mutex_init(&pinstance->aen_queue_lock);
5107 /* Work-queue (Shared) for deferred processing error handling */
5108 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5110 /* Initialize the default log_level */
5111 pinstance->current_log_level = pmcraid_log_level;
5113 /* Setup variables required for reset engine */
5114 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5115 pinstance->reset_cmd = NULL;
5120 * pmcraid_shutdown - shutdown adapter controller.
5121 * @pdev: pci device struct
5123 * Issues an adapter shutdown to the card waits for its completion
5128 static void pmcraid_shutdown(struct pci_dev *pdev)
5130 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5131 pmcraid_reset_bringdown(pinstance);
5136 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5138 static unsigned short pmcraid_get_minor(void)
5142 minor = find_first_zero_bit(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
5143 __set_bit(minor, pmcraid_minor);
5148 * pmcraid_release_minor - releases given minor back to minor number bitmap
5150 static void pmcraid_release_minor(unsigned short minor)
5152 __clear_bit(minor, pmcraid_minor);
5156 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5158 * @pinstance: pointer to adapter instance for which to register device
5161 * 0 in case of success, otherwise non-zero
5163 static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5168 minor = pmcraid_get_minor();
5169 cdev_init(&pinstance->cdev, &pmcraid_fops);
5170 pinstance->cdev.owner = THIS_MODULE;
5172 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5175 pmcraid_release_minor(minor);
5177 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
5178 NULL, "%s%u", PMCRAID_DEVFILE, minor);
5183 * pmcraid_release_chrdev - unregisters per-adapter management interface
5185 * @pinstance: pointer to adapter instance structure
5190 static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5192 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5193 device_destroy(pmcraid_class,
5194 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5195 cdev_del(&pinstance->cdev);
5199 * pmcraid_remove - IOA hot plug remove entry point
5200 * @pdev: pci device struct
5205 static void pmcraid_remove(struct pci_dev *pdev)
5207 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5209 /* remove the management interface (/dev file) for this device */
5210 pmcraid_release_chrdev(pinstance);
5212 /* remove host template from scsi midlayer */
5213 scsi_remove_host(pinstance->host);
5215 /* block requests from mid-layer */
5216 scsi_block_requests(pinstance->host);
5218 /* initiate shutdown adapter */
5219 pmcraid_shutdown(pdev);
5221 pmcraid_disable_interrupts(pinstance, ~0);
5222 flush_work(&pinstance->worker_q);
5224 pmcraid_kill_tasklets(pinstance);
5225 pmcraid_unregister_interrupt_handler(pinstance);
5226 pmcraid_release_buffers(pinstance);
5227 iounmap(pinstance->mapped_dma_addr);
5228 pci_release_regions(pdev);
5229 scsi_host_put(pinstance->host);
5230 pci_disable_device(pdev);
5236 * pmcraid_suspend - driver suspend entry point for power management
5237 * @dev: Device structure
5239 * Return Value - 0 always
5241 static int __maybe_unused pmcraid_suspend(struct device *dev)
5243 struct pci_dev *pdev = to_pci_dev(dev);
5244 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5246 pmcraid_shutdown(pdev);
5247 pmcraid_disable_interrupts(pinstance, ~0);
5248 pmcraid_kill_tasklets(pinstance);
5249 pmcraid_unregister_interrupt_handler(pinstance);
5255 * pmcraid_resume - driver resume entry point PCI power management
5256 * @dev: Device structure
5258 * Return Value - 0 in case of success. Error code in case of any failure
5260 static int __maybe_unused pmcraid_resume(struct device *dev)
5262 struct pci_dev *pdev = to_pci_dev(dev);
5263 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5264 struct Scsi_Host *host = pinstance->host;
5267 if (sizeof(dma_addr_t) == 4 ||
5268 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
5269 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
5272 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
5275 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
5276 goto disable_device;
5279 pmcraid_disable_interrupts(pinstance, ~0);
5280 atomic_set(&pinstance->outstanding_cmds, 0);
5281 rc = pmcraid_register_interrupt_handler(pinstance);
5285 "resume: couldn't register interrupt handlers\n");
5290 pmcraid_init_tasklets(pinstance);
5291 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5293 /* Start with hard reset sequence which brings up IOA to operational
5294 * state as well as completes the reset sequence.
5296 pinstance->ioa_hard_reset = 1;
5298 /* Start IOA firmware initialization and bring card to Operational
5301 if (pmcraid_reset_bringup(pinstance)) {
5302 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5304 goto release_tasklets;
5310 pmcraid_disable_interrupts(pinstance, ~0);
5311 pmcraid_kill_tasklets(pinstance);
5312 pmcraid_unregister_interrupt_handler(pinstance);
5315 scsi_host_put(host);
5323 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5324 * completion of the ioa reset
5325 * @cmd: pointer to reset command block
5327 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5329 struct pmcraid_instance *pinstance = cmd->drv_inst;
5330 unsigned long flags;
5332 spin_lock_irqsave(pinstance->host->host_lock, flags);
5333 pmcraid_ioa_reset(cmd);
5334 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5335 scsi_unblock_requests(pinstance->host);
5336 schedule_work(&pinstance->worker_q);
5340 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5342 * @cmd: pointer to pmcraid_cmd structure
5345 * 0 for success or non-zero for failure cases
5347 static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5349 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5350 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5352 pmcraid_reinit_cmdblk(cmd);
5354 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5355 ioarcb->request_type = REQ_TYPE_IOACMD;
5356 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5357 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5359 /* If this was called as part of resource table reinitialization due to
5360 * lost CCN, it is enough to return the command block back to free pool
5361 * as part of set_supported_devs completion function.
5363 if (cmd->drv_inst->reinit_cfg_table) {
5364 cmd->drv_inst->reinit_cfg_table = 0;
5366 cmd_done = pmcraid_reinit_cfgtable_done;
5369 /* we will be done with the reset sequence after set supported devices,
5370 * setup the done function to return the command block back to free
5373 pmcraid_send_cmd(cmd,
5375 PMCRAID_SET_SUP_DEV_TIMEOUT,
5376 pmcraid_timeout_handler);
5381 * pmcraid_set_timestamp - set the timestamp to IOAFP
5383 * @cmd: pointer to pmcraid_cmd structure
5386 * 0 for success or non-zero for failure cases
5388 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5390 struct pmcraid_instance *pinstance = cmd->drv_inst;
5391 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5392 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5393 struct pmcraid_ioadl_desc *ioadl;
5396 timestamp = ktime_get_real_seconds() * 1000;
5398 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5399 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5400 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5401 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5402 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5403 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5405 pmcraid_reinit_cmdblk(cmd);
5406 ioarcb->request_type = REQ_TYPE_SCSI;
5407 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5408 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5409 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5410 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5412 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5413 offsetof(struct pmcraid_ioarcb,
5414 add_data.u.ioadl[0]));
5415 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5416 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
5418 ioarcb->request_flags0 |= NO_LINK_DESCS;
5419 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5420 ioarcb->data_transfer_length =
5421 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5422 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5423 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5424 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5425 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5427 if (!pinstance->timestamp_error) {
5428 pinstance->timestamp_error = 0;
5429 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5430 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5432 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5433 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5440 * pmcraid_init_res_table - Initialize the resource table
5441 * @cmd: pointer to pmcraid command struct
5443 * This function looks through the existing resource table, comparing
5444 * it with the config table. This function will take care of old/new
5445 * devices and schedule adding/removing them from the mid-layer
5451 static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5453 struct pmcraid_instance *pinstance = cmd->drv_inst;
5454 struct pmcraid_resource_entry *res, *temp;
5455 struct pmcraid_config_table_entry *cfgte;
5456 unsigned long lock_flags;
5461 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
5462 pmcraid_err("IOA requires microcode download\n");
5464 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5466 /* resource list is protected by pinstance->resource_lock.
5467 * init_res_table can be called from probe (user-thread) or runtime
5468 * reset (timer/tasklet)
5470 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5472 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5473 list_move_tail(&res->queue, &old_res);
5475 for (i = 0; i < le16_to_cpu(pinstance->cfg_table->num_entries); i++) {
5476 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5477 PMCRAID_FW_VERSION_1)
5478 cfgte = &pinstance->cfg_table->entries[i];
5480 cfgte = (struct pmcraid_config_table_entry *)
5481 &pinstance->cfg_table->entries_ext[i];
5483 if (!pmcraid_expose_resource(fw_version, cfgte))
5488 /* If this entry was already detected and initialized */
5489 list_for_each_entry_safe(res, temp, &old_res, queue) {
5491 rc = memcmp(&res->cfg_entry.resource_address,
5492 &cfgte->resource_address,
5493 sizeof(cfgte->resource_address));
5495 list_move_tail(&res->queue,
5496 &pinstance->used_res_q);
5502 /* If this is new entry, initialize it and add it the queue */
5505 if (list_empty(&pinstance->free_res_q)) {
5506 pmcraid_err("Too many devices attached\n");
5511 res = list_entry(pinstance->free_res_q.next,
5512 struct pmcraid_resource_entry, queue);
5514 res->scsi_dev = NULL;
5515 res->change_detected = RES_CHANGE_ADD;
5516 res->reset_progress = 0;
5517 list_move_tail(&res->queue, &pinstance->used_res_q);
5520 /* copy new configuration table entry details into driver
5521 * maintained resource entry
5524 memcpy(&res->cfg_entry, cfgte,
5525 pinstance->config_table_entry_size);
5526 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5527 res->cfg_entry.resource_type,
5528 (fw_version <= PMCRAID_FW_VERSION_1 ?
5529 res->cfg_entry.unique_flags1 :
5530 le16_to_cpu(res->cfg_entry.array_id) & 0xFF),
5531 le32_to_cpu(res->cfg_entry.resource_address));
5535 /* Detect any deleted entries, mark them for deletion from mid-layer */
5536 list_for_each_entry_safe(res, temp, &old_res, queue) {
5538 if (res->scsi_dev) {
5539 res->change_detected = RES_CHANGE_DEL;
5540 res->cfg_entry.resource_handle =
5541 PMCRAID_INVALID_RES_HANDLE;
5542 list_move_tail(&res->queue, &pinstance->used_res_q);
5544 list_move_tail(&res->queue, &pinstance->free_res_q);
5548 /* release the resource list lock */
5549 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5550 pmcraid_set_timestamp(cmd);
5554 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5555 * @cmd: pointer pmcraid_cmd struct
5557 * This function sends a Query IOA Configuration command to the adapter to
5558 * retrieve the IOA configuration table.
5563 static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5565 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5566 struct pmcraid_ioadl_desc *ioadl;
5567 struct pmcraid_instance *pinstance = cmd->drv_inst;
5568 __be32 cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5570 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5571 PMCRAID_FW_VERSION_1)
5572 pinstance->config_table_entry_size =
5573 sizeof(struct pmcraid_config_table_entry);
5575 pinstance->config_table_entry_size =
5576 sizeof(struct pmcraid_config_table_entry_ext);
5578 ioarcb->request_type = REQ_TYPE_IOACMD;
5579 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5581 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5583 /* firmware requires 4-byte length field, specified in B.E format */
5584 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5586 /* Since entire config table can be described by single IOADL, it can
5587 * be part of IOARCB itself
5589 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5590 offsetof(struct pmcraid_ioarcb,
5591 add_data.u.ioadl[0]));
5592 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5593 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~0x1FULL);
5595 ioarcb->request_flags0 |= NO_LINK_DESCS;
5596 ioarcb->data_transfer_length =
5597 cpu_to_le32(sizeof(struct pmcraid_config_table));
5599 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5600 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5601 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5602 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5604 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5605 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5610 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5611 * @pdev: pointer to pci device structure
5612 * @dev_id: pointer to device ids structure
5615 * returns 0 if the device is claimed and successfully configured.
5616 * returns non-zero error code in case of any failure
5618 static int pmcraid_probe(struct pci_dev *pdev,
5619 const struct pci_device_id *dev_id)
5621 struct pmcraid_instance *pinstance;
5622 struct Scsi_Host *host;
5623 void __iomem *mapped_pci_addr;
5624 int rc = PCIBIOS_SUCCESSFUL;
5626 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5628 ("maximum number(%d) of supported adapters reached\n",
5629 atomic_read(&pmcraid_adapter_count));
5633 atomic_inc(&pmcraid_adapter_count);
5634 rc = pci_enable_device(pdev);
5637 dev_err(&pdev->dev, "Cannot enable adapter\n");
5638 atomic_dec(&pmcraid_adapter_count);
5642 dev_info(&pdev->dev,
5643 "Found new IOA(%x:%x), Total IOA count: %d\n",
5644 pdev->vendor, pdev->device,
5645 atomic_read(&pmcraid_adapter_count));
5647 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5651 "Couldn't register memory range of registers\n");
5652 goto out_disable_device;
5655 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5657 if (!mapped_pci_addr) {
5658 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5660 goto out_release_regions;
5663 pci_set_master(pdev);
5665 /* Firmware requires the system bus address of IOARCB to be within
5666 * 32-bit addressable range though it has 64-bit IOARRIN register.
5667 * However, firmware supports 64-bit streaming DMA buffers, whereas
5668 * coherent buffers are to be 32-bit. Since dma_alloc_coherent always
5669 * returns memory within 4GB (if not, change this logic), coherent
5670 * buffers are within firmware acceptable address ranges.
5672 if (sizeof(dma_addr_t) == 4 ||
5673 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
5674 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
5676 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5677 * bit mask for dma_alloc_coherent to return addresses within 4GB
5680 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
5683 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5687 host = scsi_host_alloc(&pmcraid_host_template,
5688 sizeof(struct pmcraid_instance));
5691 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5696 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5697 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5698 host->unique_id = host->host_no;
5699 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5700 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5702 /* zero out entire instance structure */
5703 pinstance = (struct pmcraid_instance *)host->hostdata;
5704 memset(pinstance, 0, sizeof(*pinstance));
5706 pinstance->chip_cfg =
5707 (struct pmcraid_chip_details *)(dev_id->driver_data);
5709 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5712 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5713 goto out_scsi_host_put;
5716 pci_set_drvdata(pdev, pinstance);
5718 /* Save PCI config-space for use following the reset */
5719 rc = pci_save_state(pinstance->pdev);
5722 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5723 goto out_scsi_host_put;
5726 pmcraid_disable_interrupts(pinstance, ~0);
5728 rc = pmcraid_register_interrupt_handler(pinstance);
5731 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
5732 goto out_scsi_host_put;
5735 pmcraid_init_tasklets(pinstance);
5737 /* allocate verious buffers used by LLD.*/
5738 rc = pmcraid_init_buffers(pinstance);
5741 pmcraid_err("couldn't allocate memory blocks\n");
5742 goto out_unregister_isr;
5745 /* check the reset type required */
5746 pmcraid_reset_type(pinstance);
5748 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5750 /* Start IOA firmware initialization and bring card to Operational
5753 pmcraid_info("starting IOA initialization sequence\n");
5754 if (pmcraid_reset_bringup(pinstance)) {
5755 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5757 goto out_release_bufs;
5760 /* Add adapter instance into mid-layer list */
5761 rc = scsi_add_host(pinstance->host, &pdev->dev);
5763 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
5764 goto out_release_bufs;
5767 scsi_scan_host(pinstance->host);
5769 rc = pmcraid_setup_chrdev(pinstance);
5772 pmcraid_err("couldn't create mgmt interface, error: %x\n",
5774 goto out_remove_host;
5777 /* Schedule worker thread to handle CCN and take care of adding and
5778 * removing devices to OS
5780 atomic_set(&pinstance->expose_resources, 1);
5781 schedule_work(&pinstance->worker_q);
5785 scsi_remove_host(host);
5788 pmcraid_release_buffers(pinstance);
5791 pmcraid_kill_tasklets(pinstance);
5792 pmcraid_unregister_interrupt_handler(pinstance);
5795 scsi_host_put(host);
5798 iounmap(mapped_pci_addr);
5800 out_release_regions:
5801 pci_release_regions(pdev);
5804 atomic_dec(&pmcraid_adapter_count);
5805 pci_disable_device(pdev);
5809 static SIMPLE_DEV_PM_OPS(pmcraid_pm_ops, pmcraid_suspend, pmcraid_resume);
5812 * PCI driver structure of pmcraid driver
5814 static struct pci_driver pmcraid_driver = {
5815 .name = PMCRAID_DRIVER_NAME,
5816 .id_table = pmcraid_pci_table,
5817 .probe = pmcraid_probe,
5818 .remove = pmcraid_remove,
5819 .driver.pm = &pmcraid_pm_ops,
5820 .shutdown = pmcraid_shutdown
5824 * pmcraid_init - module load entry point
5826 static int __init pmcraid_init(void)
5831 pmcraid_info("%s Device Driver version: %s\n",
5832 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
5834 error = alloc_chrdev_region(&dev, 0,
5835 PMCRAID_MAX_ADAPTERS,
5839 pmcraid_err("failed to get a major number for adapters\n");
5843 pmcraid_major = MAJOR(dev);
5844 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
5846 if (IS_ERR(pmcraid_class)) {
5847 error = PTR_ERR(pmcraid_class);
5848 pmcraid_err("failed to register with sysfs, error = %x\n",
5850 goto out_unreg_chrdev;
5853 error = pmcraid_netlink_init();
5856 class_destroy(pmcraid_class);
5857 goto out_unreg_chrdev;
5860 error = pci_register_driver(&pmcraid_driver);
5865 pmcraid_err("failed to register pmcraid driver, error = %x\n",
5867 class_destroy(pmcraid_class);
5868 pmcraid_netlink_release();
5871 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
5878 * pmcraid_exit - module unload entry point
5880 static void __exit pmcraid_exit(void)
5882 pmcraid_netlink_release();
5883 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
5884 PMCRAID_MAX_ADAPTERS);
5885 pci_unregister_driver(&pmcraid_driver);
5886 class_destroy(pmcraid_class);
5889 module_init(pmcraid_init);
5890 module_exit(pmcraid_exit);