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 const struct class pmcraid_class = {
65 .name = PMCRAID_DEVFILE,
67 static DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
72 MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
73 MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
74 MODULE_LICENSE("GPL");
75 MODULE_VERSION(PMCRAID_DRIVER_VERSION);
77 module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
78 MODULE_PARM_DESC(log_level,
79 "Enables firmware error code logging, default :1 high-severity"
80 " errors, 2: all errors including high-severity errors,"
81 " 0: disables logging");
83 module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
84 MODULE_PARM_DESC(debug,
85 "Enable driver verbose message logging. Set 1 to enable."
88 module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
89 MODULE_PARM_DESC(disable_aen,
90 "Disable driver aen notifications to apps. Set 1 to disable."
93 /* chip specific constants for PMC MaxRAID controllers (same for
96 static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
101 .global_intr_mask = 0x00034,
102 .ioa_host_intr = 0x0009C,
103 .ioa_host_intr_clr = 0x000A0,
104 .ioa_host_msix_intr = 0x7FC40,
105 .ioa_host_mask = 0x7FC28,
106 .ioa_host_mask_clr = 0x7FC28,
107 .host_ioa_intr = 0x00020,
108 .host_ioa_intr_clr = 0x00020,
109 .transop_timeout = 300
114 * PCI device ids supported by pmcraid driver
116 static struct pci_device_id pmcraid_pci_table[] = {
117 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
118 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
123 MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
128 * pmcraid_slave_alloc - Prepare for commands to a device
129 * @scsi_dev: scsi device struct
131 * This function is called by mid-layer prior to sending any command to the new
132 * device. Stores resource entry details of the device in scsi_device struct.
133 * Queuecommand uses the resource handle and other details to fill up IOARCB
134 * while sending commands to the device.
137 * 0 on success / -ENXIO if device does not exist
139 static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
141 struct pmcraid_resource_entry *temp, *res = NULL;
142 struct pmcraid_instance *pinstance;
144 unsigned long lock_flags;
148 pinstance = shost_priv(scsi_dev->host);
150 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
152 /* Driver exposes VSET and GSCSI resources only; all other device types
153 * are not exposed. Resource list is synchronized using resource lock
154 * so any traversal or modifications to the list should be done inside
157 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
158 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
160 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
161 if (RES_IS_VSET(temp->cfg_entry)) {
162 if (fw_version <= PMCRAID_FW_VERSION_1)
163 target = temp->cfg_entry.unique_flags1;
165 target = le16_to_cpu(temp->cfg_entry.array_id) & 0xFF;
167 if (target > PMCRAID_MAX_VSET_TARGETS)
169 bus = PMCRAID_VSET_BUS_ID;
171 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
172 target = RES_TARGET(temp->cfg_entry.resource_address);
173 bus = PMCRAID_PHYS_BUS_ID;
174 lun = RES_LUN(temp->cfg_entry.resource_address);
179 if (bus == scsi_dev->channel &&
180 target == scsi_dev->id &&
181 lun == scsi_dev->lun) {
188 res->scsi_dev = scsi_dev;
189 scsi_dev->hostdata = res;
190 res->change_detected = 0;
191 atomic_set(&res->read_failures, 0);
192 atomic_set(&res->write_failures, 0);
195 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
200 * pmcraid_slave_configure - Configures a SCSI device
201 * @scsi_dev: scsi device struct
203 * This function is executed by SCSI mid layer just after a device is first
204 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
205 * timeout value (default 30s) will be over-written to a higher value (60s)
206 * and max_sectors value will be over-written to 512. It also sets queue depth
207 * to host->cmd_per_lun value
212 static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
214 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
219 /* LLD exposes VSETs and Enclosure devices only */
220 if (RES_IS_GSCSI(res->cfg_entry) &&
221 scsi_dev->type != TYPE_ENCLOSURE)
224 pmcraid_info("configuring %x:%x:%x:%x\n",
225 scsi_dev->host->unique_id,
230 if (RES_IS_GSCSI(res->cfg_entry)) {
231 scsi_dev->allow_restart = 1;
232 } else if (RES_IS_VSET(res->cfg_entry)) {
233 scsi_dev->allow_restart = 1;
234 blk_queue_rq_timeout(scsi_dev->request_queue,
235 PMCRAID_VSET_IO_TIMEOUT);
236 blk_queue_max_hw_sectors(scsi_dev->request_queue,
237 PMCRAID_VSET_MAX_SECTORS);
241 * We never want to report TCQ support for these types of devices.
243 if (!RES_IS_GSCSI(res->cfg_entry) && !RES_IS_VSET(res->cfg_entry))
244 scsi_dev->tagged_supported = 0;
250 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
252 * @scsi_dev: scsi device struct
254 * This is called by mid-layer before removing a device. Pointer assignments
255 * done in pmcraid_slave_alloc will be reset to NULL here.
260 static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
262 struct pmcraid_resource_entry *res;
264 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
267 res->scsi_dev = NULL;
269 scsi_dev->hostdata = NULL;
273 * pmcraid_change_queue_depth - Change the device's queue depth
274 * @scsi_dev: scsi device struct
275 * @depth: depth to set
280 static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth)
282 if (depth > PMCRAID_MAX_CMD_PER_LUN)
283 depth = PMCRAID_MAX_CMD_PER_LUN;
284 return scsi_change_queue_depth(scsi_dev, depth);
288 * pmcraid_init_cmdblk - initializes a command block
290 * @cmd: pointer to struct pmcraid_cmd to be initialized
291 * @index: if >=0 first time initialization; otherwise reinitialization
296 static void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
298 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
299 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
302 /* first time initialization (called from probe) */
304 offsetof(struct pmcraid_control_block, ioasa);
307 ioarcb->response_handle = cpu_to_le32(index << 2);
308 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
309 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
310 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
312 /* re-initialization of various lengths, called once command is
315 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
317 ioarcb->request_flags0 = 0;
318 ioarcb->request_flags1 = 0;
319 ioarcb->cmd_timeout = 0;
320 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~0x1FULL);
321 ioarcb->ioadl_bus_addr = 0;
322 ioarcb->ioadl_length = 0;
323 ioarcb->data_transfer_length = 0;
324 ioarcb->add_cmd_param_length = 0;
325 ioarcb->add_cmd_param_offset = 0;
326 cmd->ioa_cb->ioasa.ioasc = 0;
327 cmd->ioa_cb->ioasa.residual_data_length = 0;
331 cmd->cmd_done = NULL;
332 cmd->scsi_cmd = NULL;
334 cmd->completion_req = 0;
335 cmd->sense_buffer = NULL;
336 cmd->sense_buffer_dma = 0;
338 timer_setup(&cmd->timer, NULL, 0);
342 * pmcraid_reinit_cmdblk - reinitialize a command block
344 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
349 static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
351 pmcraid_init_cmdblk(cmd, -1);
355 * pmcraid_get_free_cmd - get a free cmd block from command block pool
356 * @pinstance: adapter instance structure
359 * returns pointer to cmd block or NULL if no blocks are available
361 static struct pmcraid_cmd *pmcraid_get_free_cmd(
362 struct pmcraid_instance *pinstance
365 struct pmcraid_cmd *cmd = NULL;
366 unsigned long lock_flags;
368 /* free cmd block list is protected by free_pool_lock */
369 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
371 if (!list_empty(&pinstance->free_cmd_pool)) {
372 cmd = list_entry(pinstance->free_cmd_pool.next,
373 struct pmcraid_cmd, free_list);
374 list_del(&cmd->free_list);
376 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
378 /* Initialize the command block before giving it the caller */
380 pmcraid_reinit_cmdblk(cmd);
385 * pmcraid_return_cmd - return a completed command block back into free pool
386 * @cmd: pointer to the command block
391 static void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
393 struct pmcraid_instance *pinstance = cmd->drv_inst;
394 unsigned long lock_flags;
396 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
397 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
398 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
402 * pmcraid_read_interrupts - reads IOA interrupts
404 * @pinstance: pointer to adapter instance structure
407 * interrupts read from IOA
409 static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
411 return (pinstance->interrupt_mode) ?
412 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
413 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
417 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
419 * @pinstance: pointer to per adapter instance structure
420 * @intrs: interrupts to disable
425 static void pmcraid_disable_interrupts(
426 struct pmcraid_instance *pinstance,
430 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
431 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
433 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
434 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
435 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
437 if (!pinstance->interrupt_mode) {
439 pinstance->int_regs.ioa_host_interrupt_mask_reg);
440 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
445 * pmcraid_enable_interrupts - Enables specified interrupts
447 * @pinstance: pointer to per adapter instance structure
448 * @intrs: interrupts to enable
453 static void pmcraid_enable_interrupts(
454 struct pmcraid_instance *pinstance,
457 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
458 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
460 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
462 if (!pinstance->interrupt_mode) {
464 pinstance->int_regs.ioa_host_interrupt_mask_reg);
465 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
468 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
469 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
470 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
474 * pmcraid_clr_trans_op - clear trans to op interrupt
476 * @pinstance: pointer to per adapter instance structure
481 static void pmcraid_clr_trans_op(
482 struct pmcraid_instance *pinstance
485 unsigned long lock_flags;
487 if (!pinstance->interrupt_mode) {
488 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
489 pinstance->int_regs.ioa_host_interrupt_mask_reg);
490 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
491 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
492 pinstance->int_regs.ioa_host_interrupt_clr_reg);
493 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
496 if (pinstance->reset_cmd != NULL) {
497 del_timer(&pinstance->reset_cmd->timer);
499 pinstance->host->host_lock, lock_flags);
500 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
501 spin_unlock_irqrestore(
502 pinstance->host->host_lock, lock_flags);
507 * pmcraid_reset_type - Determine the required reset type
508 * @pinstance: pointer to adapter instance structure
510 * IOA requires hard reset if any of the following conditions is true.
511 * 1. If HRRQ valid interrupt is not masked
512 * 2. IOA reset alert doorbell is set
513 * 3. If there are any error interrupts
515 static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
521 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
522 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
523 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
525 if ((mask & INTRS_HRRQ_VALID) == 0 ||
526 (alerts & DOORBELL_IOA_RESET_ALERT) ||
527 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
528 pmcraid_info("IOA requires hard reset\n");
529 pinstance->ioa_hard_reset = 1;
532 /* If unit check is active, trigger the dump */
533 if (intrs & INTRS_IOA_UNIT_CHECK)
534 pinstance->ioa_unit_check = 1;
537 static void pmcraid_ioa_reset(struct pmcraid_cmd *);
539 * pmcraid_bist_done - completion function for PCI BIST
540 * @t: pointer to reset command
544 static void pmcraid_bist_done(struct timer_list *t)
546 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
547 struct pmcraid_instance *pinstance = cmd->drv_inst;
548 unsigned long lock_flags;
552 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
554 /* If PCI config space can't be accessed wait for another two secs */
555 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
556 cmd->time_left > 0) {
557 pmcraid_info("BIST not complete, waiting another 2 secs\n");
558 cmd->timer.expires = jiffies + cmd->time_left;
560 add_timer(&cmd->timer);
563 pmcraid_info("BIST is complete, proceeding with reset\n");
564 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
565 pmcraid_ioa_reset(cmd);
566 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
571 * pmcraid_start_bist - starts BIST
572 * @cmd: pointer to reset cmd
576 static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
578 struct pmcraid_instance *pinstance = cmd->drv_inst;
579 u32 doorbells, intrs;
581 /* proceed with bist and wait for 2 seconds */
582 iowrite32(DOORBELL_IOA_START_BIST,
583 pinstance->int_regs.host_ioa_interrupt_reg);
584 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
585 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
586 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
589 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
590 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
591 cmd->timer.function = pmcraid_bist_done;
592 add_timer(&cmd->timer);
596 * pmcraid_reset_alert_done - completion routine for reset_alert
597 * @t: pointer to command block used in reset sequence
601 static void pmcraid_reset_alert_done(struct timer_list *t)
603 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
604 struct pmcraid_instance *pinstance = cmd->drv_inst;
605 u32 status = ioread32(pinstance->ioa_status);
606 unsigned long lock_flags;
608 /* if the critical operation in progress bit is set or the wait times
609 * out, invoke reset engine to proceed with hard reset. If there is
610 * some more time to wait, restart the timer
612 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
613 cmd->time_left <= 0) {
614 pmcraid_info("critical op is reset proceeding with reset\n");
615 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
616 pmcraid_ioa_reset(cmd);
617 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
619 pmcraid_info("critical op is not yet reset waiting again\n");
620 /* restart timer if some more time is available to wait */
621 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
622 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
623 cmd->timer.function = pmcraid_reset_alert_done;
624 add_timer(&cmd->timer);
628 static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
630 * pmcraid_reset_alert - alerts IOA for a possible reset
631 * @cmd: command block to be used for reset sequence.
634 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
635 * successfully written to IOA. Returns non-zero in case pci_config_space
638 static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
640 struct pmcraid_instance *pinstance = cmd->drv_inst;
645 /* If we are able to access IOA PCI config space, alert IOA that we are
646 * going to reset it soon. This enables IOA to preserv persistent error
647 * data if any. In case memory space is not accessible, proceed with
650 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
651 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
653 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
654 * reset IOA doesn't generate any interrupts when CRITICAL
655 * OPERATION bit is reset. A timer is started to wait for this
658 cmd->time_left = PMCRAID_RESET_TIMEOUT;
659 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
660 cmd->timer.function = pmcraid_reset_alert_done;
661 add_timer(&cmd->timer);
663 iowrite32(DOORBELL_IOA_RESET_ALERT,
664 pinstance->int_regs.host_ioa_interrupt_reg);
666 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
667 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
669 pmcraid_info("PCI config is not accessible starting BIST\n");
670 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
671 pmcraid_start_bist(cmd);
676 * pmcraid_timeout_handler - Timeout handler for internally generated ops
678 * @t: pointer to command structure, that got timedout
680 * This function blocks host requests and initiates an adapter reset.
685 static void pmcraid_timeout_handler(struct timer_list *t)
687 struct pmcraid_cmd *cmd = from_timer(cmd, t, timer);
688 struct pmcraid_instance *pinstance = cmd->drv_inst;
689 unsigned long lock_flags;
691 dev_info(&pinstance->pdev->dev,
692 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
693 cmd->ioa_cb->ioarcb.cdb[0]);
695 /* Command timeouts result in hard reset sequence. The command that got
696 * timed out may be the one used as part of reset sequence. In this
697 * case restart reset sequence using the same command block even if
698 * reset is in progress. Otherwise fail this command and get a free
699 * command block to restart the reset sequence.
701 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
702 if (!pinstance->ioa_reset_in_progress) {
703 pinstance->ioa_reset_attempts = 0;
704 cmd = pmcraid_get_free_cmd(pinstance);
706 /* If we are out of command blocks, just return here itself.
707 * Some other command's timeout handler can do the reset job
710 spin_unlock_irqrestore(pinstance->host->host_lock,
712 pmcraid_err("no free cmnd block for timeout handler\n");
716 pinstance->reset_cmd = cmd;
717 pinstance->ioa_reset_in_progress = 1;
719 pmcraid_info("reset is already in progress\n");
721 if (pinstance->reset_cmd != cmd) {
722 /* This command should have been given to IOA, this
723 * command will be completed by fail_outstanding_cmds
726 pmcraid_err("cmd is pending but reset in progress\n");
729 /* If this command was being used as part of the reset
730 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
731 * causes fail_outstanding_commands not to return the command
732 * block back to free pool
734 if (cmd == pinstance->reset_cmd)
735 cmd->cmd_done = pmcraid_ioa_reset;
738 /* Notify apps of important IOA bringup/bringdown sequences */
739 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
740 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
741 pmcraid_notify_ioastate(pinstance,
742 PMC_DEVICE_EVENT_RESET_START);
744 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
745 scsi_block_requests(pinstance->host);
746 pmcraid_reset_alert(cmd);
747 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
751 * pmcraid_internal_done - completion routine for internally generated cmds
753 * @cmd: command that got response from IOA
758 static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
760 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
761 cmd->ioa_cb->ioarcb.cdb[0],
762 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
764 /* Some of the internal commands are sent with callers blocking for the
765 * response. Same will be indicated as part of cmd->completion_req
766 * field. Response path needs to wake up any waiters waiting for cmd
767 * completion if this flag is set.
769 if (cmd->completion_req) {
770 cmd->completion_req = 0;
771 complete(&cmd->wait_for_completion);
774 /* most of the internal commands are completed by caller itself, so
775 * no need to return the command block back to free pool until we are
776 * required to do so (e.g once done with initialization).
780 pmcraid_return_cmd(cmd);
785 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
787 * @cmd: command that got response from IOA
789 * This routine is called after driver re-reads configuration table due to a
790 * lost CCN. It returns the command block back to free pool and schedules
791 * worker thread to add/delete devices into the system.
796 static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
798 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
799 cmd->ioa_cb->ioarcb.cdb[0],
800 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
804 pmcraid_return_cmd(cmd);
806 pmcraid_info("scheduling worker for config table reinitialization\n");
807 schedule_work(&cmd->drv_inst->worker_q);
811 * pmcraid_erp_done - Process completion of SCSI error response from device
812 * @cmd: pmcraid_command
814 * This function copies the sense buffer into the scsi_cmd struct and completes
815 * scsi_cmd by calling scsi_done function.
820 static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
822 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
823 struct pmcraid_instance *pinstance = cmd->drv_inst;
824 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
826 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
827 scsi_cmd->result |= (DID_ERROR << 16);
828 scmd_printk(KERN_INFO, scsi_cmd,
829 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
830 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
833 if (cmd->sense_buffer) {
834 dma_unmap_single(&pinstance->pdev->dev, cmd->sense_buffer_dma,
835 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
836 cmd->sense_buffer = NULL;
837 cmd->sense_buffer_dma = 0;
840 scsi_dma_unmap(scsi_cmd);
841 pmcraid_return_cmd(cmd);
846 * _pmcraid_fire_command - sends an IOA command to adapter
848 * This function adds the given block into pending command list
849 * and returns without waiting
851 * @cmd : command to be sent to the device
856 static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
858 struct pmcraid_instance *pinstance = cmd->drv_inst;
859 unsigned long lock_flags;
861 /* Add this command block to pending cmd pool. We do this prior to
862 * writting IOARCB to ioarrin because IOA might complete the command
863 * by the time we are about to add it to the list. Response handler
864 * (isr/tasklet) looks for cmd block in the pending pending list.
866 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
867 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
868 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
869 atomic_inc(&pinstance->outstanding_cmds);
871 /* driver writes lower 32-bit value of IOARCB address only */
873 iowrite32(le64_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr), pinstance->ioarrin);
877 * pmcraid_send_cmd - fires a command to IOA
879 * This function also sets up timeout function, and command completion
882 * @cmd: pointer to the command block to be fired to IOA
883 * @cmd_done: command completion function, called once IOA responds
884 * @timeout: timeout to wait for this command completion
885 * @timeout_func: timeout handler
890 static void pmcraid_send_cmd(
891 struct pmcraid_cmd *cmd,
892 void (*cmd_done) (struct pmcraid_cmd *),
893 unsigned long timeout,
894 void (*timeout_func) (struct timer_list *)
897 /* initialize done function */
898 cmd->cmd_done = cmd_done;
901 /* setup timeout handler */
902 cmd->timer.expires = jiffies + timeout;
903 cmd->timer.function = timeout_func;
904 add_timer(&cmd->timer);
907 /* fire the command to IOA */
908 _pmcraid_fire_command(cmd);
912 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
913 * @cmd: pointer to the command block used for sending IOA shutdown command
918 static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
920 struct pmcraid_instance *pinstance = cmd->drv_inst;
921 unsigned long lock_flags;
923 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
924 pmcraid_ioa_reset(cmd);
925 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
929 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
931 * @cmd: pointer to the command block used as part of reset sequence
936 static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
938 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
939 cmd->ioa_cb->ioarcb.cdb[0],
940 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
942 /* Note that commands sent during reset require next command to be sent
943 * to IOA. Hence reinit the done function as well as timeout function
945 pmcraid_reinit_cmdblk(cmd);
946 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
947 cmd->ioa_cb->ioarcb.resource_handle =
948 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
949 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
950 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
952 /* fire shutdown command to hardware. */
953 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
954 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
956 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
958 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
959 PMCRAID_SHUTDOWN_TIMEOUT,
960 pmcraid_timeout_handler);
963 static void pmcraid_querycfg(struct pmcraid_cmd *);
965 * pmcraid_get_fwversion_done - completion function for get_fwversion
967 * @cmd: pointer to command block used to send INQUIRY command
972 static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
974 struct pmcraid_instance *pinstance = cmd->drv_inst;
975 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
976 unsigned long lock_flags;
978 /* configuration table entry size depends on firmware version. If fw
979 * version is not known, it is not possible to interpret IOA config
983 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
984 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
985 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
986 pmcraid_reset_alert(cmd);
987 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
989 pmcraid_querycfg(cmd);
994 * pmcraid_get_fwversion - reads firmware version information
996 * @cmd: pointer to command block used to send INQUIRY command
1001 static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1003 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1004 struct pmcraid_ioadl_desc *ioadl;
1005 struct pmcraid_instance *pinstance = cmd->drv_inst;
1006 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1008 pmcraid_reinit_cmdblk(cmd);
1009 ioarcb->request_type = REQ_TYPE_SCSI;
1010 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1011 ioarcb->cdb[0] = INQUIRY;
1013 ioarcb->cdb[2] = 0xD0;
1014 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1015 ioarcb->cdb[4] = data_size & 0xFF;
1017 /* Since entire inquiry data it can be part of IOARCB itself
1019 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1020 offsetof(struct pmcraid_ioarcb,
1021 add_data.u.ioadl[0]));
1022 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1023 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
1025 ioarcb->request_flags0 |= NO_LINK_DESCS;
1026 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1027 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1028 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1029 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1030 ioadl->data_len = cpu_to_le32(data_size);
1032 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1033 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1037 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1038 * @cmd: pointer to command block to be used for identify hrrq
1043 static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1045 struct pmcraid_instance *pinstance = cmd->drv_inst;
1046 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1047 int index = cmd->hrrq_index;
1048 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1049 __be32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
1050 void (*done_function)(struct pmcraid_cmd *);
1052 pmcraid_reinit_cmdblk(cmd);
1053 cmd->hrrq_index = index + 1;
1055 if (cmd->hrrq_index < pinstance->num_hrrq) {
1056 done_function = pmcraid_identify_hrrq;
1058 cmd->hrrq_index = 0;
1059 done_function = pmcraid_get_fwversion;
1062 /* Initialize ioarcb */
1063 ioarcb->request_type = REQ_TYPE_IOACMD;
1064 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1066 /* initialize the hrrq number where IOA will respond to this command */
1067 ioarcb->hrrq_id = index;
1068 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1069 ioarcb->cdb[1] = index;
1071 /* IOA expects 64-bit pci address to be written in B.E format
1072 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1074 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1075 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
1077 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1078 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1080 /* Subsequent commands require HRRQ identification to be successful.
1081 * Note that this gets called even during reset from SCSI mid-layer
1084 pmcraid_send_cmd(cmd, done_function,
1085 PMCRAID_INTERNAL_TIMEOUT,
1086 pmcraid_timeout_handler);
1089 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1090 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1093 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1095 * @cmd: initialized command block pointer
1100 static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1102 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1103 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1105 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1107 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1111 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1113 * @pinstance: pointer to adapter instance structure
1117 * pointer to initialized pmcraid_cmd structure or NULL
1119 static struct pmcraid_cmd *pmcraid_init_hcam
1121 struct pmcraid_instance *pinstance,
1125 struct pmcraid_cmd *cmd;
1126 struct pmcraid_ioarcb *ioarcb;
1127 struct pmcraid_ioadl_desc *ioadl;
1128 struct pmcraid_hostrcb *hcam;
1129 void (*cmd_done) (struct pmcraid_cmd *);
1133 cmd = pmcraid_get_free_cmd(pinstance);
1136 pmcraid_err("no free command blocks for hcam\n");
1140 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
1141 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
1142 cmd_done = pmcraid_process_ccn;
1143 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1144 hcam = &pinstance->ccn;
1146 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1147 cmd_done = pmcraid_process_ldn;
1148 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1149 hcam = &pinstance->ldn;
1152 /* initialize command pointer used for HCAM registration */
1155 ioarcb = &cmd->ioa_cb->ioarcb;
1156 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1157 offsetof(struct pmcraid_ioarcb,
1158 add_data.u.ioadl[0]));
1159 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1160 ioadl = ioarcb->add_data.u.ioadl;
1162 /* Initialize ioarcb */
1163 ioarcb->request_type = REQ_TYPE_HCAM;
1164 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1165 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1166 ioarcb->cdb[1] = type;
1167 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1168 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1170 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1172 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
1173 ioadl[0].data_len = cpu_to_le32(rcb_size);
1174 ioadl[0].address = cpu_to_le64(dma);
1176 cmd->cmd_done = cmd_done;
1181 * pmcraid_send_hcam - Send an HCAM to IOA
1182 * @pinstance: ioa config struct
1185 * This function will send a Host Controlled Async command to IOA.
1190 static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1192 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1193 pmcraid_send_hcam_cmd(cmd);
1198 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1200 * @cmd: pointer to cmd that is used as cancelling command
1201 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1203 static void pmcraid_prepare_cancel_cmd(
1204 struct pmcraid_cmd *cmd,
1205 struct pmcraid_cmd *cmd_to_cancel
1208 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1211 /* IOARCB address of the command to be cancelled is given in
1212 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1213 * IOARCB address are not masked.
1215 ioarcb_addr = cpu_to_be64(le64_to_cpu(cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr));
1217 /* Get the resource handle to where the command to be aborted has been
1220 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1221 ioarcb->request_type = REQ_TYPE_IOACMD;
1222 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1223 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1225 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1229 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1231 * @cmd: command to be used as cancelling command
1233 * @cmd_done: op done function for the cancelling command
1235 static void pmcraid_cancel_hcam(
1236 struct pmcraid_cmd *cmd,
1238 void (*cmd_done) (struct pmcraid_cmd *)
1241 struct pmcraid_instance *pinstance;
1242 struct pmcraid_hostrcb *hcam;
1244 pinstance = cmd->drv_inst;
1245 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1246 &pinstance->ldn : &pinstance->ccn;
1248 /* prepare for cancelling previous hcam command. If the HCAM is
1249 * currently not pending with IOA, we would have hcam->cmd as non-null
1251 if (hcam->cmd == NULL)
1254 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1256 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1257 * schedule queuecommand while we are doing this
1259 pmcraid_send_cmd(cmd, cmd_done,
1260 PMCRAID_INTERNAL_TIMEOUT,
1261 pmcraid_timeout_handler);
1265 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1267 * @cmd: command block to be used for cancelling the HCAM
1269 static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1271 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1272 cmd->ioa_cb->ioarcb.cdb[0],
1273 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1275 pmcraid_reinit_cmdblk(cmd);
1277 pmcraid_cancel_hcam(cmd,
1278 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1279 pmcraid_ioa_shutdown);
1283 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1285 * @cmd: command block to be used for cancelling the HCAM
1287 static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1289 pmcraid_cancel_hcam(cmd,
1290 PMCRAID_HCAM_CODE_LOG_DATA,
1291 pmcraid_cancel_ccn);
1295 * pmcraid_expose_resource - check if the resource can be exposed to OS
1297 * @fw_version: firmware version code
1298 * @cfgte: pointer to configuration table entry of the resource
1301 * true if resource can be added to midlayer, false(0) otherwise
1303 static int pmcraid_expose_resource(u16 fw_version,
1304 struct pmcraid_config_table_entry *cfgte)
1308 if (cfgte->resource_type == RES_TYPE_VSET) {
1309 if (fw_version <= PMCRAID_FW_VERSION_1)
1310 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1312 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1313 (cfgte->unique_flags1 & 0x80) == 0);
1315 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
1316 retval = (RES_BUS(cfgte->resource_address) !=
1317 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1321 /* attributes supported by pmcraid_event_family */
1323 PMCRAID_AEN_ATTR_UNSPEC,
1324 PMCRAID_AEN_ATTR_EVENT,
1325 __PMCRAID_AEN_ATTR_MAX,
1327 #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1329 /* commands supported by pmcraid_event_family */
1331 PMCRAID_AEN_CMD_UNSPEC,
1332 PMCRAID_AEN_CMD_EVENT,
1333 __PMCRAID_AEN_CMD_MAX,
1335 #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1337 static struct genl_multicast_group pmcraid_mcgrps[] = {
1338 { .name = "events", /* not really used - see ID discussion below */ },
1341 static struct genl_family pmcraid_event_family __ro_after_init = {
1342 .module = THIS_MODULE,
1345 .maxattr = PMCRAID_AEN_ATTR_MAX,
1346 .mcgrps = pmcraid_mcgrps,
1347 .n_mcgrps = ARRAY_SIZE(pmcraid_mcgrps),
1351 * pmcraid_netlink_init - registers pmcraid_event_family
1354 * 0 if the pmcraid_event_family is successfully registered
1355 * with netlink generic, non-zero otherwise
1357 static int __init pmcraid_netlink_init(void)
1361 result = genl_register_family(&pmcraid_event_family);
1366 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1367 pmcraid_event_family.id);
1373 * pmcraid_netlink_release - unregisters pmcraid_event_family
1378 static void pmcraid_netlink_release(void)
1380 genl_unregister_family(&pmcraid_event_family);
1384 * pmcraid_notify_aen - sends event msg to user space application
1385 * @pinstance: pointer to adapter instance structure
1388 * 0 if success, error value in case of any failure.
1390 static int pmcraid_notify_aen(
1391 struct pmcraid_instance *pinstance,
1392 struct pmcraid_aen_msg *aen_msg,
1395 struct sk_buff *skb;
1397 u32 total_size, nla_genl_hdr_total_size;
1400 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1401 MINOR(pinstance->cdev.dev));
1402 aen_msg->length = data_size;
1404 data_size += sizeof(*aen_msg);
1406 total_size = nla_total_size(data_size);
1407 /* Add GENL_HDR to total_size */
1408 nla_genl_hdr_total_size =
1409 (total_size + (GENL_HDRLEN +
1410 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1412 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
1416 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1421 /* add the genetlink message header */
1422 msg_header = genlmsg_put(skb, 0, 0,
1423 &pmcraid_event_family, 0,
1424 PMCRAID_AEN_CMD_EVENT);
1426 pmcraid_err("failed to copy command details\n");
1431 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1434 pmcraid_err("failed to copy AEN attribute data\n");
1439 /* send genetlink multicast message to notify applications */
1440 genlmsg_end(skb, msg_header);
1442 result = genlmsg_multicast(&pmcraid_event_family, skb,
1445 /* If there are no listeners, genlmsg_multicast may return non-zero
1449 pmcraid_info("error (%x) sending aen event message\n", result);
1454 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1455 * @pinstance: pointer adapter instance structure
1458 * 0 if success, error value in case of any failure
1460 static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1462 return pmcraid_notify_aen(pinstance,
1464 le32_to_cpu(pinstance->ccn.hcam->data_len) +
1465 sizeof(struct pmcraid_hcam_hdr));
1469 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1470 * @pinstance: pointer adapter instance structure
1473 * 0 if success, error value in case of any failure
1475 static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1477 return pmcraid_notify_aen(pinstance,
1479 le32_to_cpu(pinstance->ldn.hcam->data_len) +
1480 sizeof(struct pmcraid_hcam_hdr));
1484 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1485 * @pinstance: pointer adapter instance structure
1486 * @evt: controller state event to be sent
1489 * 0 if success, error value in case of any failure
1491 static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1493 pinstance->scn.ioa_state = evt;
1494 pmcraid_notify_aen(pinstance,
1495 &pinstance->scn.msg,
1500 * pmcraid_handle_config_change - Handle a config change from the adapter
1501 * @pinstance: pointer to per adapter instance structure
1507 static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1509 struct pmcraid_config_table_entry *cfg_entry;
1510 struct pmcraid_hcam_ccn *ccn_hcam;
1511 struct pmcraid_cmd *cmd;
1512 struct pmcraid_cmd *cfgcmd;
1513 struct pmcraid_resource_entry *res = NULL;
1514 unsigned long lock_flags;
1515 unsigned long host_lock_flags;
1517 u32 hidden_entry = 0;
1521 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1522 cfg_entry = &ccn_hcam->cfg_entry;
1523 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
1525 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1526 res: %x:%x:%x:%x\n",
1527 le32_to_cpu(pinstance->ccn.hcam->ilid),
1528 pinstance->ccn.hcam->op_code,
1529 (le32_to_cpu(pinstance->ccn.hcam->timestamp1) |
1530 ((le32_to_cpu(pinstance->ccn.hcam->timestamp2) & 0xffffffffLL) << 32)),
1531 pinstance->ccn.hcam->notification_type,
1532 pinstance->ccn.hcam->notification_lost,
1533 pinstance->ccn.hcam->flags,
1534 pinstance->host->unique_id,
1535 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1536 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1537 RES_BUS(cfg_entry->resource_address)),
1538 RES_IS_VSET(*cfg_entry) ?
1539 (fw_version <= PMCRAID_FW_VERSION_1 ?
1540 cfg_entry->unique_flags1 :
1541 le16_to_cpu(cfg_entry->array_id) & 0xFF) :
1542 RES_TARGET(cfg_entry->resource_address),
1543 RES_LUN(cfg_entry->resource_address));
1546 /* If this HCAM indicates a lost notification, read the config table */
1547 if (pinstance->ccn.hcam->notification_lost) {
1548 cfgcmd = pmcraid_get_free_cmd(pinstance);
1550 pmcraid_info("lost CCN, reading config table\b");
1551 pinstance->reinit_cfg_table = 1;
1552 pmcraid_querycfg(cfgcmd);
1554 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1556 goto out_notify_apps;
1559 /* If this resource is not going to be added to mid-layer, just notify
1560 * applications and return. If this notification is about hiding a VSET
1561 * resource, check if it was exposed already.
1563 if (pinstance->ccn.hcam->notification_type ==
1564 NOTIFICATION_TYPE_ENTRY_CHANGED &&
1565 cfg_entry->resource_type == RES_TYPE_VSET) {
1566 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1567 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
1568 goto out_notify_apps;
1571 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1572 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1573 rc = memcmp(&res->cfg_entry.resource_address,
1574 &cfg_entry->resource_address,
1575 sizeof(cfg_entry->resource_address));
1585 spin_unlock_irqrestore(&pinstance->resource_lock,
1587 goto out_notify_apps;
1590 /* If there are more number of resources than what driver can
1591 * manage, do not notify the applications about the CCN. Just
1592 * ignore this notifications and re-register the same HCAM
1594 if (list_empty(&pinstance->free_res_q)) {
1595 spin_unlock_irqrestore(&pinstance->resource_lock,
1597 pmcraid_err("too many resources attached\n");
1598 spin_lock_irqsave(pinstance->host->host_lock,
1600 pmcraid_send_hcam(pinstance,
1601 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1602 spin_unlock_irqrestore(pinstance->host->host_lock,
1607 res = list_entry(pinstance->free_res_q.next,
1608 struct pmcraid_resource_entry, queue);
1610 list_del(&res->queue);
1611 res->scsi_dev = NULL;
1612 res->reset_progress = 0;
1613 list_add_tail(&res->queue, &pinstance->used_res_q);
1616 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
1618 if (pinstance->ccn.hcam->notification_type ==
1619 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
1620 if (res->scsi_dev) {
1621 if (fw_version <= PMCRAID_FW_VERSION_1)
1622 res->cfg_entry.unique_flags1 &= 0x7F;
1624 res->cfg_entry.array_id &= cpu_to_le16(0xFF);
1625 res->change_detected = RES_CHANGE_DEL;
1626 res->cfg_entry.resource_handle =
1627 PMCRAID_INVALID_RES_HANDLE;
1628 schedule_work(&pinstance->worker_q);
1630 /* This may be one of the non-exposed resources */
1631 list_move_tail(&res->queue, &pinstance->free_res_q);
1633 } else if (!res->scsi_dev) {
1634 res->change_detected = RES_CHANGE_ADD;
1635 schedule_work(&pinstance->worker_q);
1637 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1641 /* Notify configuration changes to registered applications.*/
1642 if (!pmcraid_disable_aen)
1643 pmcraid_notify_ccn(pinstance);
1645 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1647 pmcraid_send_hcam_cmd(cmd);
1651 * pmcraid_get_error_info - return error string for an ioasc
1652 * @ioasc: ioasc code
1656 static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1659 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1660 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1661 return &pmcraid_ioasc_error_table[i];
1667 * pmcraid_ioasc_logger - log IOASC information based user-settings
1668 * @ioasc: ioasc code
1669 * @cmd: pointer to command that resulted in 'ioasc'
1671 static void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1673 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1675 if (error_info == NULL ||
1676 cmd->drv_inst->current_log_level < error_info->log_level)
1679 /* log the error string */
1680 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1681 cmd->ioa_cb->ioarcb.cdb[0],
1682 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
1683 ioasc, error_info->error_string);
1687 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1689 * @pinstance: pointer to per adapter instance structure
1694 static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1696 struct pmcraid_hcam_ldn *hcam_ldn;
1699 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1702 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1703 pinstance->ldn.hcam->ilid,
1704 pinstance->ldn.hcam->op_code,
1705 pinstance->ldn.hcam->notification_type,
1706 pinstance->ldn.hcam->notification_lost,
1707 pinstance->ldn.hcam->flags,
1708 pinstance->ldn.hcam->overlay_id);
1710 /* log only the errors, no need to log informational log entries */
1711 if (pinstance->ldn.hcam->notification_type !=
1712 NOTIFICATION_TYPE_ERROR_LOG)
1715 if (pinstance->ldn.hcam->notification_lost ==
1716 HOSTRCB_NOTIFICATIONS_LOST)
1717 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
1719 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1721 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1722 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
1723 dev_info(&pinstance->pdev->dev,
1724 "UnitAttention due to IOA Bus Reset\n");
1725 scsi_report_bus_reset(
1727 RES_BUS(hcam_ldn->error_log.fd_ra));
1734 * pmcraid_process_ccn - Op done function for a CCN.
1735 * @cmd: pointer to command struct
1737 * This function is the op done function for a configuration
1738 * change notification
1743 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1745 struct pmcraid_instance *pinstance = cmd->drv_inst;
1746 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1747 unsigned long lock_flags;
1749 pinstance->ccn.cmd = NULL;
1750 pmcraid_return_cmd(cmd);
1752 /* If driver initiated IOA reset happened while this hcam was pending
1753 * with IOA, or IOA bringdown sequence is in progress, no need to
1754 * re-register the hcam
1756 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1757 atomic_read(&pinstance->ccn.ignore) == 1) {
1760 dev_info(&pinstance->pdev->dev,
1761 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1762 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1763 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1764 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1766 pmcraid_handle_config_change(pinstance);
1770 static void pmcraid_initiate_reset(struct pmcraid_instance *);
1771 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
1773 * pmcraid_process_ldn - op done function for an LDN
1774 * @cmd: pointer to command block
1779 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1781 struct pmcraid_instance *pinstance = cmd->drv_inst;
1782 struct pmcraid_hcam_ldn *ldn_hcam =
1783 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1784 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1785 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1786 unsigned long lock_flags;
1788 /* return the command block back to freepool */
1789 pinstance->ldn.cmd = NULL;
1790 pmcraid_return_cmd(cmd);
1792 /* If driver initiated IOA reset happened while this hcam was pending
1793 * with IOA, no need to re-register the hcam as reset engine will do it
1794 * once reset sequence is complete
1796 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1797 atomic_read(&pinstance->ccn.ignore) == 1) {
1799 } else if (!ioasc) {
1800 pmcraid_handle_error_log(pinstance);
1801 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1802 spin_lock_irqsave(pinstance->host->host_lock,
1804 pmcraid_initiate_reset(pinstance);
1805 spin_unlock_irqrestore(pinstance->host->host_lock,
1809 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1810 pinstance->timestamp_error = 1;
1811 pmcraid_set_timestamp(cmd);
1814 dev_info(&pinstance->pdev->dev,
1815 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1817 /* send netlink message for HCAM notification if enabled */
1818 if (!pmcraid_disable_aen)
1819 pmcraid_notify_ldn(pinstance);
1821 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1823 pmcraid_send_hcam_cmd(cmd);
1827 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1829 * @pinstance: pointer per adapter instance structure
1834 static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1836 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1837 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1841 * pmcraid_unregister_hcams - cancel HCAMs registered already
1842 * @cmd: pointer to command used as part of reset sequence
1844 static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1846 struct pmcraid_instance *pinstance = cmd->drv_inst;
1848 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1849 * handling hcam response though it is not necessary. In order to
1850 * prevent this, set 'ignore', so that bring-down sequence doesn't
1851 * re-send any more hcams
1853 atomic_set(&pinstance->ccn.ignore, 1);
1854 atomic_set(&pinstance->ldn.ignore, 1);
1856 /* If adapter reset was forced as part of runtime reset sequence,
1857 * start the reset sequence. Reset will be triggered even in case
1860 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1861 pinstance->ioa_unit_check) {
1862 pinstance->force_ioa_reset = 0;
1863 pinstance->ioa_unit_check = 0;
1864 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1865 pmcraid_reset_alert(cmd);
1869 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1870 * one after the other. So CCN cancellation will be triggered by
1871 * pmcraid_cancel_ldn itself.
1873 pmcraid_cancel_ldn(cmd);
1876 static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1879 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1880 * @pinstance: pointer to adapter instance structure
1882 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1884 static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1888 pmcraid_reinit_buffers(pinstance);
1889 intrs = pmcraid_read_interrupts(pinstance);
1891 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1893 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
1894 if (!pinstance->interrupt_mode) {
1895 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1896 pinstance->int_regs.
1897 ioa_host_interrupt_mask_reg);
1898 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1899 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1908 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1909 * @cmd : pointer to reset command block
1914 static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1916 struct pmcraid_instance *pinstance = cmd->drv_inst;
1920 /* There will be an interrupt when Transition to Operational bit is
1921 * set so tasklet would execute next reset task. The timeout handler
1922 * would re-initiate a reset
1924 cmd->cmd_done = pmcraid_ioa_reset;
1925 cmd->timer.expires = jiffies +
1926 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
1927 cmd->timer.function = pmcraid_timeout_handler;
1929 if (!timer_pending(&cmd->timer))
1930 add_timer(&cmd->timer);
1932 /* Enable destructive diagnostics on IOA if it is not yet in
1935 doorbell = DOORBELL_RUNTIME_RESET |
1936 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
1938 /* Since we do RESET_ALERT and Start BIST we have to again write
1939 * MSIX Doorbell to indicate the interrupt mode
1941 if (pinstance->interrupt_mode) {
1942 iowrite32(DOORBELL_INTR_MODE_MSIX,
1943 pinstance->int_regs.host_ioa_interrupt_reg);
1944 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
1947 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
1948 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
1949 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
1951 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
1952 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
1957 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
1959 * @pinstance: pointer to adapter instance structure
1964 static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
1966 pmcraid_info("%s is not yet implemented\n", __func__);
1970 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
1971 * @pinstance: pointer to adapter instance structure
1973 * This function fails all outstanding ops. If they are submitted to IOA
1974 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
1975 * otherwise just completes the commands and returns the cmd blocks to free
1981 static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
1983 struct pmcraid_cmd *cmd, *temp;
1984 unsigned long lock_flags;
1986 /* pending command list is protected by pending_pool_lock. Its
1987 * traversal must be done as within this lock
1989 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
1990 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
1992 list_del(&cmd->free_list);
1993 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
1995 cmd->ioa_cb->ioasa.ioasc =
1996 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
1997 cmd->ioa_cb->ioasa.ilid =
1998 cpu_to_le32(PMCRAID_DRIVER_ILID);
2000 /* In case the command timer is still running */
2001 del_timer(&cmd->timer);
2003 /* If this is an IO command, complete it by invoking scsi_done
2004 * function. If this is one of the internal commands other
2005 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2008 if (cmd->scsi_cmd) {
2010 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2011 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2013 scsi_cmd->result |= DID_ERROR << 16;
2015 scsi_dma_unmap(scsi_cmd);
2016 pmcraid_return_cmd(cmd);
2018 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2019 le32_to_cpu(resp) >> 2,
2020 cmd->ioa_cb->ioarcb.cdb[0],
2022 scsi_done(scsi_cmd);
2023 } else if (cmd->cmd_done == pmcraid_internal_done ||
2024 cmd->cmd_done == pmcraid_erp_done) {
2026 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2027 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
2028 pmcraid_return_cmd(cmd);
2031 atomic_dec(&pinstance->outstanding_cmds);
2032 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2035 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2039 * pmcraid_ioa_reset - Implementation of IOA reset logic
2041 * @cmd: pointer to the cmd block to be used for entire reset process
2043 * This function executes most of the steps required for IOA reset. This gets
2044 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2045 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2046 * synchronized using host lock. Various functions called during reset process
2047 * would make use of a single command block, pointer to which is also stored in
2048 * adapter instance structure.
2053 static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2055 struct pmcraid_instance *pinstance = cmd->drv_inst;
2056 u8 reset_complete = 0;
2058 pinstance->ioa_reset_in_progress = 1;
2060 if (pinstance->reset_cmd != cmd) {
2061 pmcraid_err("reset is called with different command block\n");
2062 pinstance->reset_cmd = cmd;
2065 pmcraid_info("reset_engine: state = %d, command = %p\n",
2066 pinstance->ioa_state, cmd);
2068 switch (pinstance->ioa_state) {
2070 case IOA_STATE_DEAD:
2071 /* If IOA is offline, whatever may be the reset reason, just
2072 * return. callers might be waiting on the reset wait_q, wake
2075 pmcraid_err("IOA is offline no reset is possible\n");
2079 case IOA_STATE_IN_BRINGDOWN:
2080 /* we enter here, once ioa shutdown command is processed by IOA
2081 * Alert IOA for a possible reset. If reset alert fails, IOA
2082 * goes through hard-reset
2084 pmcraid_disable_interrupts(pinstance, ~0);
2085 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2086 pmcraid_reset_alert(cmd);
2089 case IOA_STATE_UNKNOWN:
2090 /* We may be called during probe or resume. Some pre-processing
2091 * is required for prior to reset
2093 scsi_block_requests(pinstance->host);
2095 /* If asked to reset while IOA was processing responses or
2096 * there are any error responses then IOA may require
2099 if (pinstance->ioa_hard_reset == 0) {
2100 if (ioread32(pinstance->ioa_status) &
2101 INTRS_TRANSITION_TO_OPERATIONAL) {
2102 pmcraid_info("sticky bit set, bring-up\n");
2103 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2104 pmcraid_reinit_cmdblk(cmd);
2105 pmcraid_identify_hrrq(cmd);
2107 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2108 pmcraid_soft_reset(cmd);
2111 /* Alert IOA of a possible reset and wait for critical
2112 * operation in progress bit to reset
2114 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2115 pmcraid_reset_alert(cmd);
2119 case IOA_STATE_IN_RESET_ALERT:
2120 /* If critical operation in progress bit is reset or wait gets
2121 * timed out, reset proceeds with starting BIST on the IOA.
2122 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2123 * they are 3 or more, reset engine marks IOA dead and returns
2125 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2126 pmcraid_start_bist(cmd);
2129 case IOA_STATE_IN_HARD_RESET:
2130 pinstance->ioa_reset_attempts++;
2132 /* retry reset if we haven't reached maximum allowed limit */
2133 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2134 pinstance->ioa_reset_attempts = 0;
2135 pmcraid_err("IOA didn't respond marking it as dead\n");
2136 pinstance->ioa_state = IOA_STATE_DEAD;
2138 if (pinstance->ioa_bringdown)
2139 pmcraid_notify_ioastate(pinstance,
2140 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2142 pmcraid_notify_ioastate(pinstance,
2143 PMC_DEVICE_EVENT_RESET_FAILED);
2148 /* Once either bist or pci reset is done, restore PCI config
2149 * space. If this fails, proceed with hard reset again
2151 pci_restore_state(pinstance->pdev);
2153 /* fail all pending commands */
2154 pmcraid_fail_outstanding_cmds(pinstance);
2156 /* check if unit check is active, if so extract dump */
2157 if (pinstance->ioa_unit_check) {
2158 pmcraid_info("unit check is active\n");
2159 pinstance->ioa_unit_check = 0;
2160 pmcraid_get_dump(pinstance);
2161 pinstance->ioa_reset_attempts--;
2162 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2163 pmcraid_reset_alert(cmd);
2167 /* if the reset reason is to bring-down the ioa, we might be
2168 * done with the reset restore pci_config_space and complete
2171 if (pinstance->ioa_bringdown) {
2172 pmcraid_info("bringing down the adapter\n");
2173 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2174 pinstance->ioa_bringdown = 0;
2175 pinstance->ioa_state = IOA_STATE_UNKNOWN;
2176 pmcraid_notify_ioastate(pinstance,
2177 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
2180 /* bring-up IOA, so proceed with soft reset
2181 * Reinitialize hrrq_buffers and their indices also
2182 * enable interrupts after a pci_restore_state
2184 if (pmcraid_reset_enable_ioa(pinstance)) {
2185 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2186 pmcraid_info("bringing up the adapter\n");
2187 pmcraid_reinit_cmdblk(cmd);
2188 pmcraid_identify_hrrq(cmd);
2190 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2191 pmcraid_soft_reset(cmd);
2196 case IOA_STATE_IN_SOFT_RESET:
2197 /* TRANSITION TO OPERATIONAL is on so start initialization
2200 pmcraid_info("In softreset proceeding with bring-up\n");
2201 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2203 /* Initialization commands start with HRRQ identification. From
2204 * now on tasklet completes most of the commands as IOA is up
2205 * and intrs are enabled
2207 pmcraid_identify_hrrq(cmd);
2210 case IOA_STATE_IN_BRINGUP:
2211 /* we are done with bringing up of IOA, change the ioa_state to
2212 * operational and wake up any waiters
2214 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2218 case IOA_STATE_OPERATIONAL:
2220 /* When IOA is operational and a reset is requested, check for
2221 * the reset reason. If reset is to bring down IOA, unregister
2222 * HCAMs and initiate shutdown; if adapter reset is forced then
2223 * restart reset sequence again
2225 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2226 pinstance->force_ioa_reset == 0) {
2227 pmcraid_notify_ioastate(pinstance,
2228 PMC_DEVICE_EVENT_RESET_SUCCESS);
2231 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2232 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2233 pmcraid_reinit_cmdblk(cmd);
2234 pmcraid_unregister_hcams(cmd);
2239 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2240 * OPERATIONAL. Reset all control variables used during reset, wake up
2241 * any waiting threads and let the SCSI mid-layer send commands. Note
2242 * that host_lock must be held before invoking scsi_report_bus_reset.
2244 if (reset_complete) {
2245 pinstance->ioa_reset_in_progress = 0;
2246 pinstance->ioa_reset_attempts = 0;
2247 pinstance->reset_cmd = NULL;
2248 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2249 pinstance->ioa_bringdown = 0;
2250 pmcraid_return_cmd(cmd);
2252 /* If target state is to bring up the adapter, proceed with
2253 * hcam registration and resource exposure to mid-layer.
2255 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2256 pmcraid_register_hcams(pinstance);
2258 wake_up_all(&pinstance->reset_wait_q);
2265 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2266 * ISR/tasklet during error interrupts including IOA unit check. If reset
2267 * is already in progress, it just returns, otherwise initiates IOA reset
2268 * to bring IOA up to operational state.
2270 * @pinstance: pointer to adapter instance structure
2275 static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2277 struct pmcraid_cmd *cmd;
2279 /* If the reset is already in progress, just return, otherwise start
2280 * reset sequence and return
2282 if (!pinstance->ioa_reset_in_progress) {
2283 scsi_block_requests(pinstance->host);
2284 cmd = pmcraid_get_free_cmd(pinstance);
2287 pmcraid_err("no cmnd blocks for initiate_reset\n");
2291 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2292 pinstance->reset_cmd = cmd;
2293 pinstance->force_ioa_reset = 1;
2294 pmcraid_notify_ioastate(pinstance,
2295 PMC_DEVICE_EVENT_RESET_START);
2296 pmcraid_ioa_reset(cmd);
2301 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2303 * @pinstance: pointer adapter instance structure
2304 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2305 * @target_state: expected target state after reset
2307 * Note: This command initiates reset and waits for its completion. Hence this
2308 * should not be called from isr/timer/tasklet functions (timeout handlers,
2309 * error response handlers and interrupt handlers).
2312 * 1 in case ioa_state is not target_state, 0 otherwise.
2314 static int pmcraid_reset_reload(
2315 struct pmcraid_instance *pinstance,
2320 struct pmcraid_cmd *reset_cmd = NULL;
2321 unsigned long lock_flags;
2324 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2326 if (pinstance->ioa_reset_in_progress) {
2327 pmcraid_info("reset_reload: reset is already in progress\n");
2329 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2331 wait_event(pinstance->reset_wait_q,
2332 !pinstance->ioa_reset_in_progress);
2334 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2336 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2337 pmcraid_info("reset_reload: IOA is dead\n");
2341 if (pinstance->ioa_state == target_state) {
2347 pmcraid_info("reset_reload: proceeding with reset\n");
2348 scsi_block_requests(pinstance->host);
2349 reset_cmd = pmcraid_get_free_cmd(pinstance);
2350 if (reset_cmd == NULL) {
2351 pmcraid_err("no free cmnd for reset_reload\n");
2355 if (shutdown_type == SHUTDOWN_NORMAL)
2356 pinstance->ioa_bringdown = 1;
2358 pinstance->ioa_shutdown_type = shutdown_type;
2359 pinstance->reset_cmd = reset_cmd;
2360 pinstance->force_ioa_reset = reset;
2361 pmcraid_info("reset_reload: initiating reset\n");
2362 pmcraid_ioa_reset(reset_cmd);
2363 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2364 pmcraid_info("reset_reload: waiting for reset to complete\n");
2365 wait_event(pinstance->reset_wait_q,
2366 !pinstance->ioa_reset_in_progress);
2368 pmcraid_info("reset_reload: reset is complete !!\n");
2369 scsi_unblock_requests(pinstance->host);
2370 return pinstance->ioa_state != target_state;
2373 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2378 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2380 * @pinstance: pointer to adapter instance structure
2383 * whatever is returned from pmcraid_reset_reload
2385 static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2387 return pmcraid_reset_reload(pinstance,
2393 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2395 * @pinstance: pointer to adapter instance structure
2398 * whatever is returned from pmcraid_reset_reload
2400 static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2402 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2404 return pmcraid_reset_reload(pinstance,
2406 IOA_STATE_OPERATIONAL);
2410 * pmcraid_request_sense - Send request sense to a device
2411 * @cmd: pmcraid command struct
2413 * This function sends a request sense to a device as a result of a check
2414 * condition. This method re-uses the same command block that failed earlier.
2416 static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2418 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2419 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2420 struct device *dev = &cmd->drv_inst->pdev->dev;
2422 cmd->sense_buffer = cmd->scsi_cmd->sense_buffer;
2423 cmd->sense_buffer_dma = dma_map_single(dev, cmd->sense_buffer,
2424 SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
2425 if (dma_mapping_error(dev, cmd->sense_buffer_dma)) {
2427 ("couldn't allocate sense buffer for request sense\n");
2428 pmcraid_erp_done(cmd);
2432 /* re-use the command block */
2433 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2434 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2435 ioarcb->request_flags0 = (SYNC_COMPLETE |
2438 ioarcb->request_type = REQ_TYPE_SCSI;
2439 ioarcb->cdb[0] = REQUEST_SENSE;
2440 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2442 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2443 offsetof(struct pmcraid_ioarcb,
2444 add_data.u.ioadl[0]));
2445 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2447 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2449 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2450 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2451 ioadl->flags = IOADL_FLAGS_LAST_DESC;
2453 /* request sense might be called as part of error response processing
2454 * which runs in tasklets context. It is possible that mid-layer might
2455 * schedule queuecommand during this time, hence, writting to IOARRIN
2456 * must be protect by host_lock
2458 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2459 PMCRAID_REQUEST_SENSE_TIMEOUT,
2460 pmcraid_timeout_handler);
2464 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2465 * @cmd: command that failed
2466 * @need_sense: true if request_sense is required after cancel all
2468 * This function sends a cancel all to a device to clear the queue.
2470 static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, bool need_sense)
2472 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2473 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2474 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2476 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2477 ioarcb->request_flags0 = SYNC_OVERRIDE;
2478 ioarcb->request_type = REQ_TYPE_IOACMD;
2479 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2481 if (RES_IS_GSCSI(res->cfg_entry))
2482 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2484 ioarcb->ioadl_bus_addr = 0;
2485 ioarcb->ioadl_length = 0;
2486 ioarcb->data_transfer_length = 0;
2487 ioarcb->ioarcb_bus_addr &= cpu_to_le64((~0x1FULL));
2489 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2490 * schedule queuecommand while we are doing this
2492 pmcraid_send_cmd(cmd, need_sense ?
2493 pmcraid_erp_done : pmcraid_request_sense,
2494 PMCRAID_REQUEST_SENSE_TIMEOUT,
2495 pmcraid_timeout_handler);
2499 * pmcraid_frame_auto_sense: frame fixed format sense information
2501 * @cmd: pointer to failing command block
2506 static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2508 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2509 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2510 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2511 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2512 u32 failing_lba = 0;
2514 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2515 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2517 if (RES_IS_VSET(res->cfg_entry) &&
2518 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2519 ioasa->u.vset.failing_lba_hi != 0) {
2521 sense_buf[0] = 0x72;
2522 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2523 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2524 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2528 sense_buf[9] = 0x0A;
2529 sense_buf[10] = 0x80;
2531 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2533 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2534 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2535 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2536 sense_buf[15] = failing_lba & 0x000000ff;
2538 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2540 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2541 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2542 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2543 sense_buf[19] = failing_lba & 0x000000ff;
2545 sense_buf[0] = 0x70;
2546 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2547 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2548 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2550 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2551 if (RES_IS_VSET(res->cfg_entry))
2553 le32_to_cpu(ioasa->u.
2554 vset.failing_lba_lo);
2555 sense_buf[0] |= 0x80;
2556 sense_buf[3] = (failing_lba >> 24) & 0xff;
2557 sense_buf[4] = (failing_lba >> 16) & 0xff;
2558 sense_buf[5] = (failing_lba >> 8) & 0xff;
2559 sense_buf[6] = failing_lba & 0xff;
2562 sense_buf[7] = 6; /* additional length */
2567 * pmcraid_error_handler - Error response handlers for a SCSI op
2568 * @cmd: pointer to pmcraid_cmd that has failed
2570 * This function determines whether or not to initiate ERP on the affected
2571 * device. This is called from a tasklet, which doesn't hold any locks.
2574 * 0 it caller can complete the request, otherwise 1 where in error
2575 * handler itself completes the request and returns the command block
2578 static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2580 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2581 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2582 struct pmcraid_instance *pinstance = cmd->drv_inst;
2583 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2584 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2585 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2586 bool sense_copied = false;
2589 pmcraid_info("resource pointer is NULL\n");
2593 /* If this was a SCSI read/write command keep count of errors */
2594 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2595 atomic_inc(&res->read_failures);
2596 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2597 atomic_inc(&res->write_failures);
2599 if (!RES_IS_GSCSI(res->cfg_entry) &&
2600 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2601 pmcraid_frame_auto_sense(cmd);
2604 /* Log IOASC/IOASA information based on user settings */
2605 pmcraid_ioasc_logger(ioasc, cmd);
2607 switch (masked_ioasc) {
2609 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2610 scsi_cmd->result |= (DID_ABORT << 16);
2613 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2614 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2615 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2618 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2620 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2623 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2624 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2627 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2628 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2629 if (!res->reset_progress)
2630 scsi_report_bus_reset(pinstance->host,
2631 scsi_cmd->device->channel);
2632 scsi_cmd->result |= (DID_ERROR << 16);
2635 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2636 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2639 /* if check_condition is not active return with error otherwise
2640 * get/frame the sense buffer
2642 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2643 SAM_STAT_CHECK_CONDITION &&
2644 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2647 /* If we have auto sense data as part of IOASA pass it to
2650 if (ioasa->auto_sense_length != 0) {
2651 short sense_len = le16_to_cpu(ioasa->auto_sense_length);
2652 int data_size = min_t(u16, sense_len,
2653 SCSI_SENSE_BUFFERSIZE);
2655 memcpy(scsi_cmd->sense_buffer,
2658 sense_copied = true;
2661 if (RES_IS_GSCSI(res->cfg_entry))
2662 pmcraid_cancel_all(cmd, sense_copied);
2663 else if (sense_copied)
2664 pmcraid_erp_done(cmd);
2666 pmcraid_request_sense(cmd);
2670 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2674 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2675 scsi_cmd->result |= (DID_ERROR << 16);
2682 * pmcraid_reset_device - device reset handler functions
2684 * @scsi_dev: scsi device struct
2685 * @timeout: command timeout
2686 * @modifier: reset modifier indicating the reset sequence to be performed
2688 * This function issues a device reset to the affected device.
2689 * A LUN reset will be sent to the device first. If that does
2690 * not work, a target reset will be sent.
2695 static int pmcraid_reset_device(
2696 struct scsi_device *scsi_dev,
2697 unsigned long timeout,
2700 struct pmcraid_cmd *cmd;
2701 struct pmcraid_instance *pinstance;
2702 struct pmcraid_resource_entry *res;
2703 struct pmcraid_ioarcb *ioarcb;
2704 unsigned long lock_flags;
2708 (struct pmcraid_instance *)scsi_dev->host->hostdata;
2709 res = scsi_dev->hostdata;
2712 sdev_printk(KERN_ERR, scsi_dev,
2713 "reset_device: NULL resource pointer\n");
2717 /* If adapter is currently going through reset/reload, return failed.
2718 * This will force the mid-layer to call _eh_bus/host reset, which
2719 * will then go to sleep and wait for the reset to complete
2721 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2722 if (pinstance->ioa_reset_in_progress ||
2723 pinstance->ioa_state == IOA_STATE_DEAD) {
2724 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2728 res->reset_progress = 1;
2729 pmcraid_info("Resetting %s resource with addr %x\n",
2730 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2731 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2732 le32_to_cpu(res->cfg_entry.resource_address));
2734 /* get a free cmd block */
2735 cmd = pmcraid_get_free_cmd(pinstance);
2738 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2739 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2743 ioarcb = &cmd->ioa_cb->ioarcb;
2744 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2745 ioarcb->request_type = REQ_TYPE_IOACMD;
2746 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2748 /* Initialize reset modifier bits */
2750 modifier = ENABLE_RESET_MODIFIER | modifier;
2752 ioarcb->cdb[1] = modifier;
2754 init_completion(&cmd->wait_for_completion);
2755 cmd->completion_req = 1;
2757 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2758 cmd->ioa_cb->ioarcb.cdb[0],
2759 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2760 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2762 pmcraid_send_cmd(cmd,
2763 pmcraid_internal_done,
2765 pmcraid_timeout_handler);
2767 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2769 /* RESET_DEVICE command completes after all pending IOARCBs are
2770 * completed. Once this command is completed, pmcraind_internal_done
2771 * will wake up the 'completion' queue.
2773 wait_for_completion(&cmd->wait_for_completion);
2775 /* complete the command here itself and return the command block
2778 pmcraid_return_cmd(cmd);
2779 res->reset_progress = 0;
2780 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2782 /* set the return value based on the returned ioasc */
2783 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2787 * _pmcraid_io_done - helper for pmcraid_io_done function
2789 * @cmd: pointer to pmcraid command struct
2790 * @reslen: residual data length to be set in the ioasa
2791 * @ioasc: ioasc either returned by IOA or set by driver itself.
2793 * This function is invoked by pmcraid_io_done to complete mid-layer
2797 * 0 if caller is required to return it to free_pool. Returns 1 if
2798 * caller need not worry about freeing command block as error handler
2799 * will take care of that.
2802 static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2804 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2807 scsi_set_resid(scsi_cmd, reslen);
2809 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2810 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2811 cmd->ioa_cb->ioarcb.cdb[0],
2812 ioasc, scsi_cmd->result);
2814 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2815 rc = pmcraid_error_handler(cmd);
2818 scsi_dma_unmap(scsi_cmd);
2819 scsi_done(scsi_cmd);
2826 * pmcraid_io_done - SCSI completion function
2828 * @cmd: pointer to pmcraid command struct
2830 * This function is invoked by tasklet/mid-layer error handler to completing
2831 * the SCSI ops sent from mid-layer.
2837 static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2839 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2840 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2842 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2843 pmcraid_return_cmd(cmd);
2847 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2849 * @cmd: command block of the command to be aborted
2852 * returns pointer to command structure used as cancelling cmd
2854 static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2856 struct pmcraid_cmd *cancel_cmd;
2857 struct pmcraid_instance *pinstance;
2859 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2861 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2863 if (cancel_cmd == NULL) {
2864 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2868 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2870 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2871 cmd->ioa_cb->ioarcb.cdb[0],
2872 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2874 init_completion(&cancel_cmd->wait_for_completion);
2875 cancel_cmd->completion_req = 1;
2877 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2878 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
2879 cancel_cmd->ioa_cb->ioarcb.cdb[0],
2880 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2882 pmcraid_send_cmd(cancel_cmd,
2883 pmcraid_internal_done,
2884 PMCRAID_INTERNAL_TIMEOUT,
2885 pmcraid_timeout_handler);
2890 * pmcraid_abort_complete - Waits for ABORT TASK completion
2892 * @cancel_cmd: command block use as cancelling command
2895 * returns SUCCESS if ABORT TASK has good completion
2898 static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2900 struct pmcraid_resource_entry *res;
2903 wait_for_completion(&cancel_cmd->wait_for_completion);
2904 res = cancel_cmd->res;
2905 cancel_cmd->res = NULL;
2906 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2908 /* If the abort task is not timed out we will get a Good completion
2909 * as sense_key, otherwise we may get one the following responses
2910 * due to subsequent bus reset or device reset. In case IOASC is
2911 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
2913 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
2914 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
2915 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
2920 /* complete the command here itself */
2921 pmcraid_return_cmd(cancel_cmd);
2922 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2926 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
2928 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
2929 * mid-layer ensures that no other commands are queued. This
2930 * never gets called under interrupt, but a separate eh thread.
2935 static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
2937 struct pmcraid_instance *pinstance;
2938 struct pmcraid_cmd *cmd;
2939 struct pmcraid_resource_entry *res;
2940 unsigned long host_lock_flags;
2941 unsigned long pending_lock_flags;
2942 struct pmcraid_cmd *cancel_cmd = NULL;
2947 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2949 scmd_printk(KERN_INFO, scsi_cmd,
2950 "I/O command timed out, aborting it.\n");
2952 res = scsi_cmd->device->hostdata;
2957 /* If we are currently going through reset/reload, return failed.
2958 * This will force the mid-layer to eventually call
2959 * pmcraid_eh_host_reset which will then go to sleep and wait for the
2962 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
2964 if (pinstance->ioa_reset_in_progress ||
2965 pinstance->ioa_state == IOA_STATE_DEAD) {
2966 spin_unlock_irqrestore(pinstance->host->host_lock,
2971 /* loop over pending cmd list to find cmd corresponding to this
2972 * scsi_cmd. Note that this command might not have been completed
2973 * already. locking: all pending commands are protected with
2974 * pending_pool_lock.
2976 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
2977 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
2979 if (cmd->scsi_cmd == scsi_cmd) {
2985 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2986 pending_lock_flags);
2988 /* If the command to be aborted was given to IOA and still pending with
2989 * it, send ABORT_TASK to abort this and wait for its completion
2992 cancel_cmd = pmcraid_abort_cmd(cmd);
2994 spin_unlock_irqrestore(pinstance->host->host_lock,
2998 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
2999 rc = pmcraid_abort_complete(cancel_cmd);
3002 return cmd_found ? rc : SUCCESS;
3006 * pmcraid_eh_device_reset_handler - bus/target/device reset handler callbacks
3008 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3010 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3011 * Since these are called from mid-layer EH thread, no other IO will be queued
3012 * to the resource being reset. However, control path (IOCTL) may be active so
3013 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3014 * takes care by locking/unlocking host_lock.
3019 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3021 scmd_printk(KERN_INFO, scmd,
3022 "resetting device due to an I/O command timeout.\n");
3023 return pmcraid_reset_device(scmd->device,
3024 PMCRAID_INTERNAL_TIMEOUT,
3028 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3030 struct Scsi_Host *host = scmd->device->host;
3031 struct pmcraid_instance *pinstance =
3032 (struct pmcraid_instance *)host->hostdata;
3033 struct pmcraid_resource_entry *res = NULL;
3034 struct pmcraid_resource_entry *temp;
3035 struct scsi_device *sdev = NULL;
3036 unsigned long lock_flags;
3039 * The reset device code insists on us passing down
3040 * a device, so grab the first device on the bus.
3042 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
3043 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
3044 if (scmd->device->channel == PMCRAID_VSET_BUS_ID &&
3045 RES_IS_VSET(temp->cfg_entry)) {
3048 } else if (scmd->device->channel == PMCRAID_PHYS_BUS_ID &&
3049 RES_IS_GSCSI(temp->cfg_entry)) {
3055 sdev = res->scsi_dev;
3056 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
3060 sdev_printk(KERN_INFO, sdev,
3061 "Doing bus reset due to an I/O command timeout.\n");
3062 return pmcraid_reset_device(sdev,
3063 PMCRAID_RESET_BUS_TIMEOUT,
3067 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3069 struct Scsi_Host *shost = scmd->device->host;
3070 struct scsi_device *scsi_dev = NULL, *tmp;
3073 shost_for_each_device(tmp, shost) {
3074 if ((tmp->channel == scmd->device->channel) &&
3075 (tmp->id == scmd->device->id)) {
3082 sdev_printk(KERN_INFO, scsi_dev,
3083 "Doing target reset due to an I/O command timeout.\n");
3084 ret = pmcraid_reset_device(scsi_dev,
3085 PMCRAID_INTERNAL_TIMEOUT,
3086 RESET_DEVICE_TARGET);
3087 scsi_device_put(scsi_dev);
3092 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3094 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3096 * Initiates adapter reset to bring it up to operational state
3101 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3103 unsigned long interval = 10000; /* 10 seconds interval */
3104 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3105 struct pmcraid_instance *pinstance =
3106 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3109 /* wait for an additional 150 seconds just in case firmware could come
3110 * up and if it could complete all the pending commands excluding the
3111 * two HCAM (CCN and LDN).
3114 if (atomic_read(&pinstance->outstanding_cmds) <=
3115 PMCRAID_MAX_HCAM_CMD)
3120 dev_err(&pinstance->pdev->dev,
3121 "Adapter being reset due to an I/O command timeout.\n");
3122 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3126 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3127 * @cmd: pmcraid command struct
3128 * @sgcount: count of scatter-gather elements
3131 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3132 * or external IOADLs
3134 static struct pmcraid_ioadl_desc *
3135 pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3137 struct pmcraid_ioadl_desc *ioadl;
3138 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3139 int ioadl_count = 0;
3141 if (ioarcb->add_cmd_param_length)
3142 ioadl_count = DIV_ROUND_UP(le16_to_cpu(ioarcb->add_cmd_param_length), 16);
3143 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc) * sgcount);
3145 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3146 /* external ioadls start at offset 0x80 from control_block
3147 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3148 * It is necessary to indicate to firmware that driver is
3149 * using ioadls to be treated as external to IOARCB.
3151 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
3152 ioarcb->ioadl_bus_addr =
3153 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3154 offsetof(struct pmcraid_ioarcb,
3155 add_data.u.ioadl[3]));
3156 ioadl = &ioarcb->add_data.u.ioadl[3];
3158 ioarcb->ioadl_bus_addr =
3159 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3160 offsetof(struct pmcraid_ioarcb,
3161 add_data.u.ioadl[ioadl_count]));
3163 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3164 ioarcb->ioarcb_bus_addr |=
3165 cpu_to_le64(DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8));
3172 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3173 * @pinstance: pointer to adapter instance structure
3174 * @cmd: pmcraid command struct
3176 * This function is invoked by queuecommand entry point while sending a command
3177 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3180 * 0 on success or -1 on failure
3182 static int pmcraid_build_ioadl(
3183 struct pmcraid_instance *pinstance,
3184 struct pmcraid_cmd *cmd
3188 struct scatterlist *sglist;
3190 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3191 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3192 struct pmcraid_ioadl_desc *ioadl;
3194 u32 length = scsi_bufflen(scsi_cmd);
3199 nseg = scsi_dma_map(scsi_cmd);
3202 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
3204 } else if (nseg > PMCRAID_MAX_IOADLS) {
3205 scsi_dma_unmap(scsi_cmd);
3206 scmd_printk(KERN_ERR, scsi_cmd,
3207 "sg count is (%d) more than allowed!\n", nseg);
3211 /* Initialize IOARCB data transfer length fields */
3212 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3213 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3215 ioarcb->request_flags0 |= NO_LINK_DESCS;
3216 ioarcb->data_transfer_length = cpu_to_le32(length);
3217 ioadl = pmcraid_init_ioadls(cmd, nseg);
3219 /* Initialize IOADL descriptor addresses */
3220 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3221 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3222 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3225 /* setup last descriptor */
3226 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3232 * pmcraid_queuecommand_lck - Queue a mid-layer request
3233 * @scsi_cmd: scsi command struct
3235 * This function queues a request generated by the mid-layer. Midlayer calls
3236 * this routine within host->lock. Some of the functions called by queuecommand
3237 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3241 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3242 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3244 static int pmcraid_queuecommand_lck(struct scsi_cmnd *scsi_cmd)
3246 struct pmcraid_instance *pinstance;
3247 struct pmcraid_resource_entry *res;
3248 struct pmcraid_ioarcb *ioarcb;
3249 struct pmcraid_cmd *cmd;
3254 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3255 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3256 res = scsi_cmd->device->hostdata;
3257 scsi_cmd->result = (DID_OK << 16);
3259 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3262 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3263 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3264 scsi_cmd->result = (DID_NO_CONNECT << 16);
3265 scsi_done(scsi_cmd);
3269 /* If IOA reset is in progress, can't queue the commands */
3270 if (pinstance->ioa_reset_in_progress)
3271 return SCSI_MLQUEUE_HOST_BUSY;
3273 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3274 * the command here itself with success return
3276 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3277 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3278 scsi_done(scsi_cmd);
3282 /* initialize the command and IOARCB to be sent to IOA */
3283 cmd = pmcraid_get_free_cmd(pinstance);
3286 pmcraid_err("free command block is not available\n");
3287 return SCSI_MLQUEUE_HOST_BUSY;
3290 cmd->scsi_cmd = scsi_cmd;
3291 ioarcb = &(cmd->ioa_cb->ioarcb);
3292 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3293 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3294 ioarcb->request_type = REQ_TYPE_SCSI;
3296 /* set hrrq number where the IOA should respond to. Note that all cmds
3297 * generated internally uses hrrq_id 0, exception to this is the cmd
3298 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3299 * hrrq_id assigned here in queuecommand
3301 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3302 pinstance->num_hrrq;
3303 cmd->cmd_done = pmcraid_io_done;
3305 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3306 if (scsi_cmd->underflow == 0)
3307 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3309 if (res->sync_reqd) {
3310 ioarcb->request_flags0 |= SYNC_COMPLETE;
3314 ioarcb->request_flags0 |= NO_LINK_DESCS;
3316 if (scsi_cmd->flags & SCMD_TAGGED)
3317 ioarcb->request_flags1 |= TASK_TAG_SIMPLE;
3319 if (RES_IS_GSCSI(res->cfg_entry))
3320 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3323 rc = pmcraid_build_ioadl(pinstance, cmd);
3325 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3326 le32_to_cpu(ioarcb->response_handle) >> 2,
3327 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3328 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3329 PMCRAID_PHYS_BUS_ID,
3330 RES_IS_VSET(res->cfg_entry) ?
3331 (fw_version <= PMCRAID_FW_VERSION_1 ?
3332 res->cfg_entry.unique_flags1 :
3333 le16_to_cpu(res->cfg_entry.array_id) & 0xFF) :
3334 RES_TARGET(res->cfg_entry.resource_address),
3335 RES_LUN(res->cfg_entry.resource_address));
3337 if (likely(rc == 0)) {
3338 _pmcraid_fire_command(cmd);
3340 pmcraid_err("queuecommand could not build ioadl\n");
3341 pmcraid_return_cmd(cmd);
3342 rc = SCSI_MLQUEUE_HOST_BUSY;
3348 static DEF_SCSI_QCMD(pmcraid_queuecommand)
3351 * pmcraid_open -char node "open" entry, allowed only users with admin access
3353 static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3355 struct pmcraid_instance *pinstance;
3357 if (!capable(CAP_SYS_ADMIN))
3360 /* Populate adapter instance * pointer for use by ioctl */
3361 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3362 filep->private_data = pinstance;
3368 * pmcraid_fasync - Async notifier registration from applications
3370 * This function adds the calling process to a driver global queue. When an
3371 * event occurs, SIGIO will be sent to all processes in this queue.
3373 static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3375 struct pmcraid_instance *pinstance;
3378 pinstance = filep->private_data;
3379 mutex_lock(&pinstance->aen_queue_lock);
3380 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3381 mutex_unlock(&pinstance->aen_queue_lock);
3387 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
3389 * @pinstance: pointer to adapter instance structure
3390 * @cmd: ioctl command passed in
3391 * @buflen: length of user_buffer
3392 * @user_buffer: user buffer pointer
3395 * 0 in case of success, otherwise appropriate error code
3397 static long pmcraid_ioctl_driver(
3398 struct pmcraid_instance *pinstance,
3400 unsigned int buflen,
3401 void __user *user_buffer
3407 case PMCRAID_IOCTL_RESET_ADAPTER:
3408 pmcraid_reset_bringup(pinstance);
3420 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
3422 * @cmd: ioctl command
3424 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
3427 * negetive error code if there are access issues, otherwise zero.
3428 * Upon success, returns ioctl header copied out of user buffer.
3431 static int pmcraid_check_ioctl_buffer(
3434 struct pmcraid_ioctl_header *hdr
3439 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
3440 pmcraid_err("couldn't copy ioctl header from user buffer\n");
3444 /* check for valid driver signature */
3445 rc = memcmp(hdr->signature,
3446 PMCRAID_IOCTL_SIGNATURE,
3447 sizeof(hdr->signature));
3449 pmcraid_err("signature verification failed\n");
3457 * pmcraid_ioctl - char node ioctl entry point
3459 static long pmcraid_chr_ioctl(
3465 struct pmcraid_instance *pinstance = NULL;
3466 struct pmcraid_ioctl_header *hdr = NULL;
3467 void __user *argp = (void __user *)arg;
3468 int retval = -ENOTTY;
3470 hdr = kmalloc(sizeof(struct pmcraid_ioctl_header), GFP_KERNEL);
3473 pmcraid_err("failed to allocate memory for ioctl header\n");
3477 retval = pmcraid_check_ioctl_buffer(cmd, argp, hdr);
3480 pmcraid_info("chr_ioctl: header check failed\n");
3485 pinstance = filep->private_data;
3488 pmcraid_info("adapter instance is not found\n");
3493 switch (_IOC_TYPE(cmd)) {
3495 case PMCRAID_DRIVER_IOCTL:
3496 arg += sizeof(struct pmcraid_ioctl_header);
3497 retval = pmcraid_ioctl_driver(pinstance, cmd,
3498 hdr->buffer_length, argp);
3512 * File operations structure for management interface
3514 static const struct file_operations pmcraid_fops = {
3515 .owner = THIS_MODULE,
3516 .open = pmcraid_chr_open,
3517 .fasync = pmcraid_chr_fasync,
3518 .unlocked_ioctl = pmcraid_chr_ioctl,
3519 .compat_ioctl = compat_ptr_ioctl,
3520 .llseek = noop_llseek,
3527 * pmcraid_show_log_level - Display adapter's error logging level
3528 * @dev: class device struct
3533 * number of bytes printed to buffer
3535 static ssize_t pmcraid_show_log_level(
3537 struct device_attribute *attr,
3540 struct Scsi_Host *shost = class_to_shost(dev);
3541 struct pmcraid_instance *pinstance =
3542 (struct pmcraid_instance *)shost->hostdata;
3543 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
3547 * pmcraid_store_log_level - Change the adapter's error logging level
3548 * @dev: class device struct
3554 * number of bytes printed to buffer
3556 static ssize_t pmcraid_store_log_level(
3558 struct device_attribute *attr,
3563 struct Scsi_Host *shost;
3564 struct pmcraid_instance *pinstance;
3567 if (kstrtou8(buf, 10, &val))
3569 /* log-level should be from 0 to 2 */
3573 shost = class_to_shost(dev);
3574 pinstance = (struct pmcraid_instance *)shost->hostdata;
3575 pinstance->current_log_level = val;
3580 static struct device_attribute pmcraid_log_level_attr = {
3582 .name = "log_level",
3583 .mode = S_IRUGO | S_IWUSR,
3585 .show = pmcraid_show_log_level,
3586 .store = pmcraid_store_log_level,
3590 * pmcraid_show_drv_version - Display driver version
3591 * @dev: class device struct
3596 * number of bytes printed to buffer
3598 static ssize_t pmcraid_show_drv_version(
3600 struct device_attribute *attr,
3604 return snprintf(buf, PAGE_SIZE, "version: %s\n",
3605 PMCRAID_DRIVER_VERSION);
3608 static struct device_attribute pmcraid_driver_version_attr = {
3610 .name = "drv_version",
3613 .show = pmcraid_show_drv_version,
3617 * pmcraid_show_adapter_id - Display driver assigned adapter id
3618 * @dev: class device struct
3623 * number of bytes printed to buffer
3625 static ssize_t pmcraid_show_adapter_id(
3627 struct device_attribute *attr,
3631 struct Scsi_Host *shost = class_to_shost(dev);
3632 struct pmcraid_instance *pinstance =
3633 (struct pmcraid_instance *)shost->hostdata;
3634 u32 adapter_id = pci_dev_id(pinstance->pdev);
3635 u32 aen_group = pmcraid_event_family.id;
3637 return snprintf(buf, PAGE_SIZE,
3638 "adapter id: %d\nminor: %d\naen group: %d\n",
3639 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
3642 static struct device_attribute pmcraid_adapter_id_attr = {
3644 .name = "adapter_id",
3647 .show = pmcraid_show_adapter_id,
3650 static struct attribute *pmcraid_host_attrs[] = {
3651 &pmcraid_log_level_attr.attr,
3652 &pmcraid_driver_version_attr.attr,
3653 &pmcraid_adapter_id_attr.attr,
3657 ATTRIBUTE_GROUPS(pmcraid_host);
3659 /* host template structure for pmcraid driver */
3660 static const struct scsi_host_template pmcraid_host_template = {
3661 .module = THIS_MODULE,
3662 .name = PMCRAID_DRIVER_NAME,
3663 .queuecommand = pmcraid_queuecommand,
3664 .eh_abort_handler = pmcraid_eh_abort_handler,
3665 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
3666 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
3667 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
3668 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
3670 .slave_alloc = pmcraid_slave_alloc,
3671 .slave_configure = pmcraid_slave_configure,
3672 .slave_destroy = pmcraid_slave_destroy,
3673 .change_queue_depth = pmcraid_change_queue_depth,
3674 .can_queue = PMCRAID_MAX_IO_CMD,
3676 .sg_tablesize = PMCRAID_MAX_IOADLS,
3677 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
3679 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
3680 .shost_groups = pmcraid_host_groups,
3681 .proc_name = PMCRAID_DRIVER_NAME,
3685 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
3686 * @irq: interrupt vector number
3687 * @dev_id: pointer hrrq_vector
3690 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
3693 static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
3695 struct pmcraid_isr_param *hrrq_vector;
3696 struct pmcraid_instance *pinstance;
3697 unsigned long lock_flags;
3701 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
3702 hrrq_id = hrrq_vector->hrrq_id;
3703 pinstance = hrrq_vector->drv_inst;
3706 /* Read the interrupt */
3707 intrs_val = pmcraid_read_interrupts(pinstance);
3709 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
3710 & DOORBELL_INTR_MSIX_CLR) == 0)) {
3711 /* Any error interrupts including unit_check,
3712 * initiate IOA reset.In case of unit check indicate
3713 * to reset_sequence that IOA unit checked and prepare
3714 * for a dump during reset sequence
3716 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
3717 if (intrs_val & INTRS_IOA_UNIT_CHECK)
3718 pinstance->ioa_unit_check = 1;
3720 pmcraid_err("ISR: error interrupts: %x \
3721 initiating reset\n", intrs_val);
3722 spin_lock_irqsave(pinstance->host->host_lock,
3724 pmcraid_initiate_reset(pinstance);
3725 spin_unlock_irqrestore(
3726 pinstance->host->host_lock,
3729 /* If interrupt was as part of the ioa initialization,
3730 * clear it. Delete the timer and wakeup the
3731 * reset engine to proceed with reset sequence
3733 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
3734 pmcraid_clr_trans_op(pinstance);
3736 /* Clear the interrupt register by writing
3737 * to host to ioa doorbell. Once done
3738 * FW will clear the interrupt.
3740 iowrite32(DOORBELL_INTR_MSIX_CLR,
3741 pinstance->int_regs.host_ioa_interrupt_reg);
3742 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
3748 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
3754 * pmcraid_isr - implements legacy interrupt handling routine
3756 * @irq: interrupt vector number
3757 * @dev_id: pointer hrrq_vector
3760 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
3762 static irqreturn_t pmcraid_isr(int irq, void *dev_id)
3764 struct pmcraid_isr_param *hrrq_vector;
3765 struct pmcraid_instance *pinstance;
3767 unsigned long lock_flags;
3770 /* In case of legacy interrupt mode where interrupts are shared across
3771 * isrs, it may be possible that the current interrupt is not from IOA
3774 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
3777 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
3778 pinstance = hrrq_vector->drv_inst;
3780 intrs = pmcraid_read_interrupts(pinstance);
3782 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
3785 /* Any error interrupts including unit_check, initiate IOA reset.
3786 * In case of unit check indicate to reset_sequence that IOA unit
3787 * checked and prepare for a dump during reset sequence
3789 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
3791 if (intrs & INTRS_IOA_UNIT_CHECK)
3792 pinstance->ioa_unit_check = 1;
3795 pinstance->int_regs.ioa_host_interrupt_clr_reg);
3796 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
3799 pinstance->int_regs.ioa_host_interrupt_clr_reg);
3800 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3801 pmcraid_initiate_reset(pinstance);
3802 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3804 /* If interrupt was as part of the ioa initialization,
3805 * clear. Delete the timer and wakeup the
3806 * reset engine to proceed with reset sequence
3808 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
3809 pmcraid_clr_trans_op(pinstance);
3812 pinstance->int_regs.ioa_host_interrupt_clr_reg);
3814 pinstance->int_regs.ioa_host_interrupt_clr_reg);
3817 &(pinstance->isr_tasklet[hrrq_id]));
3826 * pmcraid_worker_function - worker thread function
3828 * @workp: pointer to struct work queue
3834 static void pmcraid_worker_function(struct work_struct *workp)
3836 struct pmcraid_instance *pinstance;
3837 struct pmcraid_resource_entry *res;
3838 struct pmcraid_resource_entry *temp;
3839 struct scsi_device *sdev;
3840 unsigned long lock_flags;
3841 unsigned long host_lock_flags;
3843 u8 bus, target, lun;
3845 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
3846 /* add resources only after host is added into system */
3847 if (!atomic_read(&pinstance->expose_resources))
3850 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3852 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
3853 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
3855 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
3856 sdev = res->scsi_dev;
3858 /* host_lock must be held before calling
3861 spin_lock_irqsave(pinstance->host->host_lock,
3863 if (!scsi_device_get(sdev)) {
3864 spin_unlock_irqrestore(
3865 pinstance->host->host_lock,
3867 pmcraid_info("deleting %x from midlayer\n",
3868 res->cfg_entry.resource_address);
3869 list_move_tail(&res->queue,
3870 &pinstance->free_res_q);
3871 spin_unlock_irqrestore(
3872 &pinstance->resource_lock,
3874 scsi_remove_device(sdev);
3875 scsi_device_put(sdev);
3876 spin_lock_irqsave(&pinstance->resource_lock,
3878 res->change_detected = 0;
3880 spin_unlock_irqrestore(
3881 pinstance->host->host_lock,
3887 list_for_each_entry(res, &pinstance->used_res_q, queue) {
3889 if (res->change_detected == RES_CHANGE_ADD) {
3891 if (!pmcraid_expose_resource(fw_version,
3895 if (RES_IS_VSET(res->cfg_entry)) {
3896 bus = PMCRAID_VSET_BUS_ID;
3897 if (fw_version <= PMCRAID_FW_VERSION_1)
3898 target = res->cfg_entry.unique_flags1;
3900 target = le16_to_cpu(res->cfg_entry.array_id) & 0xFF;
3901 lun = PMCRAID_VSET_LUN_ID;
3903 bus = PMCRAID_PHYS_BUS_ID;
3906 res->cfg_entry.resource_address);
3907 lun = RES_LUN(res->cfg_entry.resource_address);
3910 res->change_detected = 0;
3911 spin_unlock_irqrestore(&pinstance->resource_lock,
3913 scsi_add_device(pinstance->host, bus, target, lun);
3914 spin_lock_irqsave(&pinstance->resource_lock,
3919 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
3923 * pmcraid_tasklet_function - Tasklet function
3925 * @instance: pointer to msix param structure
3930 static void pmcraid_tasklet_function(unsigned long instance)
3932 struct pmcraid_isr_param *hrrq_vector;
3933 struct pmcraid_instance *pinstance;
3934 unsigned long hrrq_lock_flags;
3935 unsigned long pending_lock_flags;
3936 unsigned long host_lock_flags;
3937 spinlock_t *lockp; /* hrrq buffer lock */
3941 hrrq_vector = (struct pmcraid_isr_param *)instance;
3942 pinstance = hrrq_vector->drv_inst;
3943 id = hrrq_vector->hrrq_id;
3944 lockp = &(pinstance->hrrq_lock[id]);
3946 /* loop through each of the commands responded by IOA. Each HRRQ buf is
3947 * protected by its own lock. Traversals must be done within this lock
3948 * as there may be multiple tasklets running on multiple CPUs. Note
3949 * that the lock is held just for picking up the response handle and
3950 * manipulating hrrq_curr/toggle_bit values.
3952 spin_lock_irqsave(lockp, hrrq_lock_flags);
3954 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
3956 while ((resp & HRRQ_TOGGLE_BIT) ==
3957 pinstance->host_toggle_bit[id]) {
3959 int cmd_index = resp >> 2;
3960 struct pmcraid_cmd *cmd = NULL;
3962 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
3963 pinstance->hrrq_curr[id]++;
3965 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
3966 pinstance->host_toggle_bit[id] ^= 1u;
3969 if (cmd_index >= PMCRAID_MAX_CMD) {
3970 /* In case of invalid response handle, log message */
3971 pmcraid_err("Invalid response handle %d\n", cmd_index);
3972 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
3976 cmd = pinstance->cmd_list[cmd_index];
3977 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
3979 spin_lock_irqsave(&pinstance->pending_pool_lock,
3980 pending_lock_flags);
3981 list_del(&cmd->free_list);
3982 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3983 pending_lock_flags);
3984 del_timer(&cmd->timer);
3985 atomic_dec(&pinstance->outstanding_cmds);
3987 if (cmd->cmd_done == pmcraid_ioa_reset) {
3988 spin_lock_irqsave(pinstance->host->host_lock,
3991 spin_unlock_irqrestore(pinstance->host->host_lock,
3993 } else if (cmd->cmd_done != NULL) {
3996 /* loop over until we are done with all responses */
3997 spin_lock_irqsave(lockp, hrrq_lock_flags);
3998 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4001 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4005 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4006 * @pinstance: pointer to adapter instance structure
4008 * This routine un-registers registered interrupt handler and
4009 * also frees irqs/vectors.
4015 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4017 struct pci_dev *pdev = pinstance->pdev;
4020 for (i = 0; i < pinstance->num_hrrq; i++)
4021 free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
4023 pinstance->interrupt_mode = 0;
4024 pci_free_irq_vectors(pdev);
4028 * pmcraid_register_interrupt_handler - registers interrupt handler
4029 * @pinstance: pointer to per-adapter instance structure
4032 * 0 on success, non-zero error code otherwise.
4035 pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4037 struct pci_dev *pdev = pinstance->pdev;
4038 unsigned int irq_flag = PCI_IRQ_LEGACY, flag;
4039 int num_hrrq, rc, i;
4042 if (pmcraid_enable_msix)
4043 irq_flag |= PCI_IRQ_MSIX;
4045 num_hrrq = pci_alloc_irq_vectors(pdev, 1, PMCRAID_NUM_MSIX_VECTORS,
4050 if (pdev->msix_enabled) {
4052 isr = pmcraid_isr_msix;
4058 for (i = 0; i < num_hrrq; i++) {
4059 struct pmcraid_isr_param *vec = &pinstance->hrrq_vector[i];
4062 vec->drv_inst = pinstance;
4063 rc = request_irq(pci_irq_vector(pdev, i), isr, flag,
4064 PMCRAID_DRIVER_NAME, vec);
4069 pinstance->num_hrrq = num_hrrq;
4070 if (pdev->msix_enabled) {
4071 pinstance->interrupt_mode = 1;
4072 iowrite32(DOORBELL_INTR_MODE_MSIX,
4073 pinstance->int_regs.host_ioa_interrupt_reg);
4074 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4081 free_irq(pci_irq_vector(pdev, i), &pinstance->hrrq_vector[i]);
4082 pci_free_irq_vectors(pdev);
4087 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4088 * @pinstance: per adapter instance structure pointer
4089 * @max_index: number of buffer blocks to release
4095 pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4098 for (i = 0; i < max_index; i++) {
4099 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4100 pinstance->cmd_list[i] = NULL;
4102 kmem_cache_destroy(pinstance->cmd_cachep);
4103 pinstance->cmd_cachep = NULL;
4107 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4108 * @pinstance: pointer to per adapter instance structure
4109 * @max_index: number of buffers (from 0 onwards) to release
4111 * This function assumes that the command blocks for which control blocks are
4112 * linked are not released.
4118 pmcraid_release_control_blocks(
4119 struct pmcraid_instance *pinstance,
4125 if (pinstance->control_pool == NULL)
4128 for (i = 0; i < max_index; i++) {
4129 dma_pool_free(pinstance->control_pool,
4130 pinstance->cmd_list[i]->ioa_cb,
4131 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4132 pinstance->cmd_list[i]->ioa_cb = NULL;
4133 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4135 dma_pool_destroy(pinstance->control_pool);
4136 pinstance->control_pool = NULL;
4140 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4141 * @pinstance: pointer to per adapter instance structure
4143 * Allocates memory for command blocks using kernel slab allocator.
4146 * 0 in case of success; -ENOMEM in case of failure
4148 static int pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4152 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4153 pinstance->host->unique_id);
4156 pinstance->cmd_cachep = kmem_cache_create(
4157 pinstance->cmd_pool_name,
4158 sizeof(struct pmcraid_cmd), 0,
4159 SLAB_HWCACHE_ALIGN, NULL);
4160 if (!pinstance->cmd_cachep)
4163 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4164 pinstance->cmd_list[i] =
4165 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4166 if (!pinstance->cmd_list[i]) {
4167 pmcraid_release_cmd_blocks(pinstance, i);
4175 * pmcraid_allocate_control_blocks - allocates memory control blocks
4176 * @pinstance : pointer to per adapter instance structure
4178 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4179 * and IOASAs. This is called after command blocks are already allocated.
4182 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4184 static int pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4188 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4189 pinstance->host->unique_id);
4191 pinstance->control_pool =
4192 dma_pool_create(pinstance->ctl_pool_name,
4193 &pinstance->pdev->dev,
4194 sizeof(struct pmcraid_control_block),
4195 PMCRAID_IOARCB_ALIGNMENT, 0);
4197 if (!pinstance->control_pool)
4200 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4201 pinstance->cmd_list[i]->ioa_cb =
4203 pinstance->control_pool,
4205 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4207 if (!pinstance->cmd_list[i]->ioa_cb) {
4208 pmcraid_release_control_blocks(pinstance, i);
4216 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4217 * @pinstance: pointer to per adapter instance structure
4218 * @maxindex: size of hrrq buffer pointer array
4224 pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4228 for (i = 0; i < maxindex; i++) {
4229 dma_free_coherent(&pinstance->pdev->dev,
4230 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4231 pinstance->hrrq_start[i],
4232 pinstance->hrrq_start_bus_addr[i]);
4234 /* reset pointers and toggle bit to zeros */
4235 pinstance->hrrq_start[i] = NULL;
4236 pinstance->hrrq_start_bus_addr[i] = 0;
4237 pinstance->host_toggle_bit[i] = 0;
4242 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4243 * @pinstance: pointer to per adapter instance structure
4246 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4248 static int pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4252 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4254 for (i = 0; i < pinstance->num_hrrq; i++) {
4255 pinstance->hrrq_start[i] =
4256 dma_alloc_coherent(&pinstance->pdev->dev, buffer_size,
4257 &pinstance->hrrq_start_bus_addr[i],
4259 if (!pinstance->hrrq_start[i]) {
4260 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4262 pmcraid_release_host_rrqs(pinstance, i);
4266 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4267 pinstance->hrrq_end[i] =
4268 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4269 pinstance->host_toggle_bit[i] = 1;
4270 spin_lock_init(&pinstance->hrrq_lock[i]);
4276 * pmcraid_release_hcams - release HCAM buffers
4278 * @pinstance: pointer to per adapter instance structure
4283 static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4285 if (pinstance->ccn.msg != NULL) {
4286 dma_free_coherent(&pinstance->pdev->dev,
4287 PMCRAID_AEN_HDR_SIZE +
4288 sizeof(struct pmcraid_hcam_ccn_ext),
4290 pinstance->ccn.baddr);
4292 pinstance->ccn.msg = NULL;
4293 pinstance->ccn.hcam = NULL;
4294 pinstance->ccn.baddr = 0;
4297 if (pinstance->ldn.msg != NULL) {
4298 dma_free_coherent(&pinstance->pdev->dev,
4299 PMCRAID_AEN_HDR_SIZE +
4300 sizeof(struct pmcraid_hcam_ldn),
4302 pinstance->ldn.baddr);
4304 pinstance->ldn.msg = NULL;
4305 pinstance->ldn.hcam = NULL;
4306 pinstance->ldn.baddr = 0;
4311 * pmcraid_allocate_hcams - allocates HCAM buffers
4312 * @pinstance : pointer to per adapter instance structure
4315 * 0 in case of successful allocation, non-zero otherwise
4317 static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
4319 pinstance->ccn.msg = dma_alloc_coherent(&pinstance->pdev->dev,
4320 PMCRAID_AEN_HDR_SIZE +
4321 sizeof(struct pmcraid_hcam_ccn_ext),
4322 &pinstance->ccn.baddr, GFP_KERNEL);
4324 pinstance->ldn.msg = dma_alloc_coherent(&pinstance->pdev->dev,
4325 PMCRAID_AEN_HDR_SIZE +
4326 sizeof(struct pmcraid_hcam_ldn),
4327 &pinstance->ldn.baddr, GFP_KERNEL);
4329 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
4330 pmcraid_release_hcams(pinstance);
4332 pinstance->ccn.hcam =
4333 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
4334 pinstance->ldn.hcam =
4335 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
4337 atomic_set(&pinstance->ccn.ignore, 0);
4338 atomic_set(&pinstance->ldn.ignore, 0);
4341 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
4345 * pmcraid_release_config_buffers - release config.table buffers
4346 * @pinstance: pointer to per adapter instance structure
4351 static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
4353 if (pinstance->cfg_table != NULL &&
4354 pinstance->cfg_table_bus_addr != 0) {
4355 dma_free_coherent(&pinstance->pdev->dev,
4356 sizeof(struct pmcraid_config_table),
4357 pinstance->cfg_table,
4358 pinstance->cfg_table_bus_addr);
4359 pinstance->cfg_table = NULL;
4360 pinstance->cfg_table_bus_addr = 0;
4363 if (pinstance->res_entries != NULL) {
4366 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
4367 list_del(&pinstance->res_entries[i].queue);
4368 kfree(pinstance->res_entries);
4369 pinstance->res_entries = NULL;
4372 pmcraid_release_hcams(pinstance);
4376 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
4377 * @pinstance : pointer to per adapter instance structure
4380 * 0 for successful allocation, -ENOMEM for any failure
4382 static int pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
4386 pinstance->res_entries =
4387 kcalloc(PMCRAID_MAX_RESOURCES,
4388 sizeof(struct pmcraid_resource_entry),
4391 if (NULL == pinstance->res_entries) {
4392 pmcraid_err("failed to allocate memory for resource table\n");
4396 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
4397 list_add_tail(&pinstance->res_entries[i].queue,
4398 &pinstance->free_res_q);
4400 pinstance->cfg_table = dma_alloc_coherent(&pinstance->pdev->dev,
4401 sizeof(struct pmcraid_config_table),
4402 &pinstance->cfg_table_bus_addr,
4405 if (NULL == pinstance->cfg_table) {
4406 pmcraid_err("couldn't alloc DMA memory for config table\n");
4407 pmcraid_release_config_buffers(pinstance);
4411 if (pmcraid_allocate_hcams(pinstance)) {
4412 pmcraid_err("could not alloc DMA memory for HCAMS\n");
4413 pmcraid_release_config_buffers(pinstance);
4421 * pmcraid_init_tasklets - registers tasklets for response handling
4423 * @pinstance: pointer adapter instance structure
4428 static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
4431 for (i = 0; i < pinstance->num_hrrq; i++)
4432 tasklet_init(&pinstance->isr_tasklet[i],
4433 pmcraid_tasklet_function,
4434 (unsigned long)&pinstance->hrrq_vector[i]);
4438 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
4440 * @pinstance: pointer to adapter instance structure
4445 static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
4448 for (i = 0; i < pinstance->num_hrrq; i++)
4449 tasklet_kill(&pinstance->isr_tasklet[i]);
4453 * pmcraid_release_buffers - release per-adapter buffers allocated
4455 * @pinstance: pointer to adapter soft state
4460 static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
4462 pmcraid_release_config_buffers(pinstance);
4463 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
4464 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
4465 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4467 if (pinstance->inq_data != NULL) {
4468 dma_free_coherent(&pinstance->pdev->dev,
4469 sizeof(struct pmcraid_inquiry_data),
4470 pinstance->inq_data,
4471 pinstance->inq_data_baddr);
4473 pinstance->inq_data = NULL;
4474 pinstance->inq_data_baddr = 0;
4477 if (pinstance->timestamp_data != NULL) {
4478 dma_free_coherent(&pinstance->pdev->dev,
4479 sizeof(struct pmcraid_timestamp_data),
4480 pinstance->timestamp_data,
4481 pinstance->timestamp_data_baddr);
4483 pinstance->timestamp_data = NULL;
4484 pinstance->timestamp_data_baddr = 0;
4489 * pmcraid_init_buffers - allocates memory and initializes various structures
4490 * @pinstance: pointer to per adapter instance structure
4492 * This routine pre-allocates memory based on the type of block as below:
4493 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
4494 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
4495 * config-table entries : DMAable memory using dma_alloc_coherent
4496 * HostRRQs : DMAable memory, using dma_alloc_coherent
4499 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
4501 static int pmcraid_init_buffers(struct pmcraid_instance *pinstance)
4505 if (pmcraid_allocate_host_rrqs(pinstance)) {
4506 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
4507 pinstance->num_hrrq);
4511 if (pmcraid_allocate_config_buffers(pinstance)) {
4512 pmcraid_err("couldn't allocate memory for config buffers\n");
4513 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4517 if (pmcraid_allocate_cmd_blocks(pinstance)) {
4518 pmcraid_err("couldn't allocate memory for cmd blocks\n");
4519 pmcraid_release_config_buffers(pinstance);
4520 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4524 if (pmcraid_allocate_control_blocks(pinstance)) {
4525 pmcraid_err("couldn't allocate memory control blocks\n");
4526 pmcraid_release_config_buffers(pinstance);
4527 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
4528 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
4532 /* allocate DMAable memory for page D0 INQUIRY buffer */
4533 pinstance->inq_data = dma_alloc_coherent(&pinstance->pdev->dev,
4534 sizeof(struct pmcraid_inquiry_data),
4535 &pinstance->inq_data_baddr, GFP_KERNEL);
4536 if (pinstance->inq_data == NULL) {
4537 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
4538 pmcraid_release_buffers(pinstance);
4542 /* allocate DMAable memory for set timestamp data buffer */
4543 pinstance->timestamp_data = dma_alloc_coherent(&pinstance->pdev->dev,
4544 sizeof(struct pmcraid_timestamp_data),
4545 &pinstance->timestamp_data_baddr,
4547 if (pinstance->timestamp_data == NULL) {
4548 pmcraid_err("couldn't allocate DMA memory for \
4549 set time_stamp \n");
4550 pmcraid_release_buffers(pinstance);
4555 /* Initialize all the command blocks and add them to free pool. No
4556 * need to lock (free_pool_lock) as this is done in initialization
4559 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4560 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
4561 pmcraid_init_cmdblk(cmdp, i);
4562 cmdp->drv_inst = pinstance;
4563 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
4570 * pmcraid_reinit_buffers - resets various buffer pointers
4571 * @pinstance: pointer to adapter instance
4575 static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
4578 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4580 for (i = 0; i < pinstance->num_hrrq; i++) {
4581 memset(pinstance->hrrq_start[i], 0, buffer_size);
4582 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4583 pinstance->hrrq_end[i] =
4584 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4585 pinstance->host_toggle_bit[i] = 1;
4590 * pmcraid_init_instance - initialize per instance data structure
4591 * @pdev: pointer to pci device structure
4592 * @host: pointer to Scsi_Host structure
4593 * @mapped_pci_addr: memory mapped IOA configuration registers
4596 * 0 on success, non-zero in case of any failure
4598 static int pmcraid_init_instance(struct pci_dev *pdev, struct Scsi_Host *host,
4599 void __iomem *mapped_pci_addr)
4601 struct pmcraid_instance *pinstance =
4602 (struct pmcraid_instance *)host->hostdata;
4604 pinstance->host = host;
4605 pinstance->pdev = pdev;
4607 /* Initialize register addresses */
4608 pinstance->mapped_dma_addr = mapped_pci_addr;
4610 /* Initialize chip-specific details */
4612 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
4613 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
4615 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
4617 pint_regs->ioa_host_interrupt_reg =
4618 mapped_pci_addr + chip_cfg->ioa_host_intr;
4619 pint_regs->ioa_host_interrupt_clr_reg =
4620 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
4621 pint_regs->ioa_host_msix_interrupt_reg =
4622 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
4623 pint_regs->host_ioa_interrupt_reg =
4624 mapped_pci_addr + chip_cfg->host_ioa_intr;
4625 pint_regs->host_ioa_interrupt_clr_reg =
4626 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
4628 /* Current version of firmware exposes interrupt mask set
4629 * and mask clr registers through memory mapped bar0.
4631 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
4632 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
4633 pint_regs->ioa_host_interrupt_mask_reg =
4634 mapped_pci_addr + chip_cfg->ioa_host_mask;
4635 pint_regs->ioa_host_interrupt_mask_clr_reg =
4636 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
4637 pint_regs->global_interrupt_mask_reg =
4638 mapped_pci_addr + chip_cfg->global_intr_mask;
4641 pinstance->ioa_reset_attempts = 0;
4642 init_waitqueue_head(&pinstance->reset_wait_q);
4644 atomic_set(&pinstance->outstanding_cmds, 0);
4645 atomic_set(&pinstance->last_message_id, 0);
4646 atomic_set(&pinstance->expose_resources, 0);
4648 INIT_LIST_HEAD(&pinstance->free_res_q);
4649 INIT_LIST_HEAD(&pinstance->used_res_q);
4650 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
4651 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
4653 spin_lock_init(&pinstance->free_pool_lock);
4654 spin_lock_init(&pinstance->pending_pool_lock);
4655 spin_lock_init(&pinstance->resource_lock);
4656 mutex_init(&pinstance->aen_queue_lock);
4658 /* Work-queue (Shared) for deferred processing error handling */
4659 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
4661 /* Initialize the default log_level */
4662 pinstance->current_log_level = pmcraid_log_level;
4664 /* Setup variables required for reset engine */
4665 pinstance->ioa_state = IOA_STATE_UNKNOWN;
4666 pinstance->reset_cmd = NULL;
4671 * pmcraid_shutdown - shutdown adapter controller.
4672 * @pdev: pci device struct
4674 * Issues an adapter shutdown to the card waits for its completion
4679 static void pmcraid_shutdown(struct pci_dev *pdev)
4681 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
4682 pmcraid_reset_bringdown(pinstance);
4687 * pmcraid_get_minor - returns unused minor number from minor number bitmap
4689 static unsigned short pmcraid_get_minor(void)
4693 minor = find_first_zero_bit(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
4694 __set_bit(minor, pmcraid_minor);
4699 * pmcraid_release_minor - releases given minor back to minor number bitmap
4701 static void pmcraid_release_minor(unsigned short minor)
4703 __clear_bit(minor, pmcraid_minor);
4707 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
4709 * @pinstance: pointer to adapter instance for which to register device
4712 * 0 in case of success, otherwise non-zero
4714 static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
4719 minor = pmcraid_get_minor();
4720 cdev_init(&pinstance->cdev, &pmcraid_fops);
4721 pinstance->cdev.owner = THIS_MODULE;
4723 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
4726 pmcraid_release_minor(minor);
4728 device_create(&pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
4729 NULL, "%s%u", PMCRAID_DEVFILE, minor);
4734 * pmcraid_release_chrdev - unregisters per-adapter management interface
4736 * @pinstance: pointer to adapter instance structure
4741 static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
4743 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
4744 device_destroy(&pmcraid_class,
4745 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
4746 cdev_del(&pinstance->cdev);
4750 * pmcraid_remove - IOA hot plug remove entry point
4751 * @pdev: pci device struct
4756 static void pmcraid_remove(struct pci_dev *pdev)
4758 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
4760 /* remove the management interface (/dev file) for this device */
4761 pmcraid_release_chrdev(pinstance);
4763 /* remove host template from scsi midlayer */
4764 scsi_remove_host(pinstance->host);
4766 /* block requests from mid-layer */
4767 scsi_block_requests(pinstance->host);
4769 /* initiate shutdown adapter */
4770 pmcraid_shutdown(pdev);
4772 pmcraid_disable_interrupts(pinstance, ~0);
4773 flush_work(&pinstance->worker_q);
4775 pmcraid_kill_tasklets(pinstance);
4776 pmcraid_unregister_interrupt_handler(pinstance);
4777 pmcraid_release_buffers(pinstance);
4778 iounmap(pinstance->mapped_dma_addr);
4779 pci_release_regions(pdev);
4780 scsi_host_put(pinstance->host);
4781 pci_disable_device(pdev);
4787 * pmcraid_suspend - driver suspend entry point for power management
4788 * @dev: Device structure
4790 * Return Value - 0 always
4792 static int __maybe_unused pmcraid_suspend(struct device *dev)
4794 struct pci_dev *pdev = to_pci_dev(dev);
4795 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
4797 pmcraid_shutdown(pdev);
4798 pmcraid_disable_interrupts(pinstance, ~0);
4799 pmcraid_kill_tasklets(pinstance);
4800 pmcraid_unregister_interrupt_handler(pinstance);
4806 * pmcraid_resume - driver resume entry point PCI power management
4807 * @dev: Device structure
4809 * Return Value - 0 in case of success. Error code in case of any failure
4811 static int __maybe_unused pmcraid_resume(struct device *dev)
4813 struct pci_dev *pdev = to_pci_dev(dev);
4814 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
4815 struct Scsi_Host *host = pinstance->host;
4818 if (sizeof(dma_addr_t) == 4 ||
4819 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
4820 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4823 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
4826 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
4827 goto disable_device;
4830 pmcraid_disable_interrupts(pinstance, ~0);
4831 atomic_set(&pinstance->outstanding_cmds, 0);
4832 rc = pmcraid_register_interrupt_handler(pinstance);
4836 "resume: couldn't register interrupt handlers\n");
4841 pmcraid_init_tasklets(pinstance);
4842 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
4844 /* Start with hard reset sequence which brings up IOA to operational
4845 * state as well as completes the reset sequence.
4847 pinstance->ioa_hard_reset = 1;
4849 /* Start IOA firmware initialization and bring card to Operational
4852 if (pmcraid_reset_bringup(pinstance)) {
4853 dev_err(&pdev->dev, "couldn't initialize IOA\n");
4855 goto release_tasklets;
4861 pmcraid_disable_interrupts(pinstance, ~0);
4862 pmcraid_kill_tasklets(pinstance);
4863 pmcraid_unregister_interrupt_handler(pinstance);
4866 scsi_host_put(host);
4874 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
4875 * completion of the ioa reset
4876 * @cmd: pointer to reset command block
4878 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
4880 struct pmcraid_instance *pinstance = cmd->drv_inst;
4881 unsigned long flags;
4883 spin_lock_irqsave(pinstance->host->host_lock, flags);
4884 pmcraid_ioa_reset(cmd);
4885 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
4886 scsi_unblock_requests(pinstance->host);
4887 schedule_work(&pinstance->worker_q);
4891 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
4893 * @cmd: pointer to pmcraid_cmd structure
4896 * 0 for success or non-zero for failure cases
4898 static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
4900 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
4901 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
4903 pmcraid_reinit_cmdblk(cmd);
4905 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
4906 ioarcb->request_type = REQ_TYPE_IOACMD;
4907 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
4908 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
4910 /* If this was called as part of resource table reinitialization due to
4911 * lost CCN, it is enough to return the command block back to free pool
4912 * as part of set_supported_devs completion function.
4914 if (cmd->drv_inst->reinit_cfg_table) {
4915 cmd->drv_inst->reinit_cfg_table = 0;
4917 cmd_done = pmcraid_reinit_cfgtable_done;
4920 /* we will be done with the reset sequence after set supported devices,
4921 * setup the done function to return the command block back to free
4924 pmcraid_send_cmd(cmd,
4926 PMCRAID_SET_SUP_DEV_TIMEOUT,
4927 pmcraid_timeout_handler);
4932 * pmcraid_set_timestamp - set the timestamp to IOAFP
4934 * @cmd: pointer to pmcraid_cmd structure
4937 * 0 for success or non-zero for failure cases
4939 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
4941 struct pmcraid_instance *pinstance = cmd->drv_inst;
4942 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
4943 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
4944 struct pmcraid_ioadl_desc *ioadl;
4947 timestamp = ktime_get_real_seconds() * 1000;
4949 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
4950 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
4951 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
4952 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
4953 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
4954 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
4956 pmcraid_reinit_cmdblk(cmd);
4957 ioarcb->request_type = REQ_TYPE_SCSI;
4958 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
4959 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
4960 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
4961 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
4963 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
4964 offsetof(struct pmcraid_ioarcb,
4965 add_data.u.ioadl[0]));
4966 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
4967 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~(0x1FULL));
4969 ioarcb->request_flags0 |= NO_LINK_DESCS;
4970 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
4971 ioarcb->data_transfer_length =
4972 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
4973 ioadl = &(ioarcb->add_data.u.ioadl[0]);
4974 ioadl->flags = IOADL_FLAGS_LAST_DESC;
4975 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
4976 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
4978 if (!pinstance->timestamp_error) {
4979 pinstance->timestamp_error = 0;
4980 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
4981 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
4983 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
4984 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
4991 * pmcraid_init_res_table - Initialize the resource table
4992 * @cmd: pointer to pmcraid command struct
4994 * This function looks through the existing resource table, comparing
4995 * it with the config table. This function will take care of old/new
4996 * devices and schedule adding/removing them from the mid-layer
5002 static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5004 struct pmcraid_instance *pinstance = cmd->drv_inst;
5005 struct pmcraid_resource_entry *res, *temp;
5006 struct pmcraid_config_table_entry *cfgte;
5007 unsigned long lock_flags;
5012 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
5013 pmcraid_err("IOA requires microcode download\n");
5015 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5017 /* resource list is protected by pinstance->resource_lock.
5018 * init_res_table can be called from probe (user-thread) or runtime
5019 * reset (timer/tasklet)
5021 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5023 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5024 list_move_tail(&res->queue, &old_res);
5026 for (i = 0; i < le16_to_cpu(pinstance->cfg_table->num_entries); i++) {
5027 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5028 PMCRAID_FW_VERSION_1)
5029 cfgte = &pinstance->cfg_table->entries[i];
5031 cfgte = (struct pmcraid_config_table_entry *)
5032 &pinstance->cfg_table->entries_ext[i];
5034 if (!pmcraid_expose_resource(fw_version, cfgte))
5039 /* If this entry was already detected and initialized */
5040 list_for_each_entry_safe(res, temp, &old_res, queue) {
5042 rc = memcmp(&res->cfg_entry.resource_address,
5043 &cfgte->resource_address,
5044 sizeof(cfgte->resource_address));
5046 list_move_tail(&res->queue,
5047 &pinstance->used_res_q);
5053 /* If this is new entry, initialize it and add it the queue */
5056 if (list_empty(&pinstance->free_res_q)) {
5057 pmcraid_err("Too many devices attached\n");
5062 res = list_entry(pinstance->free_res_q.next,
5063 struct pmcraid_resource_entry, queue);
5065 res->scsi_dev = NULL;
5066 res->change_detected = RES_CHANGE_ADD;
5067 res->reset_progress = 0;
5068 list_move_tail(&res->queue, &pinstance->used_res_q);
5071 /* copy new configuration table entry details into driver
5072 * maintained resource entry
5075 memcpy(&res->cfg_entry, cfgte,
5076 pinstance->config_table_entry_size);
5077 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5078 res->cfg_entry.resource_type,
5079 (fw_version <= PMCRAID_FW_VERSION_1 ?
5080 res->cfg_entry.unique_flags1 :
5081 le16_to_cpu(res->cfg_entry.array_id) & 0xFF),
5082 le32_to_cpu(res->cfg_entry.resource_address));
5086 /* Detect any deleted entries, mark them for deletion from mid-layer */
5087 list_for_each_entry_safe(res, temp, &old_res, queue) {
5089 if (res->scsi_dev) {
5090 res->change_detected = RES_CHANGE_DEL;
5091 res->cfg_entry.resource_handle =
5092 PMCRAID_INVALID_RES_HANDLE;
5093 list_move_tail(&res->queue, &pinstance->used_res_q);
5095 list_move_tail(&res->queue, &pinstance->free_res_q);
5099 /* release the resource list lock */
5100 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5101 pmcraid_set_timestamp(cmd);
5105 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5106 * @cmd: pointer pmcraid_cmd struct
5108 * This function sends a Query IOA Configuration command to the adapter to
5109 * retrieve the IOA configuration table.
5114 static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5116 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5117 struct pmcraid_ioadl_desc *ioadl;
5118 struct pmcraid_instance *pinstance = cmd->drv_inst;
5119 __be32 cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5121 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5122 PMCRAID_FW_VERSION_1)
5123 pinstance->config_table_entry_size =
5124 sizeof(struct pmcraid_config_table_entry);
5126 pinstance->config_table_entry_size =
5127 sizeof(struct pmcraid_config_table_entry_ext);
5129 ioarcb->request_type = REQ_TYPE_IOACMD;
5130 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5132 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5134 /* firmware requires 4-byte length field, specified in B.E format */
5135 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5137 /* Since entire config table can be described by single IOADL, it can
5138 * be part of IOARCB itself
5140 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5141 offsetof(struct pmcraid_ioarcb,
5142 add_data.u.ioadl[0]));
5143 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5144 ioarcb->ioarcb_bus_addr &= cpu_to_le64(~0x1FULL);
5146 ioarcb->request_flags0 |= NO_LINK_DESCS;
5147 ioarcb->data_transfer_length =
5148 cpu_to_le32(sizeof(struct pmcraid_config_table));
5150 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5151 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5152 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5153 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5155 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5156 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5161 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5162 * @pdev: pointer to pci device structure
5163 * @dev_id: pointer to device ids structure
5166 * returns 0 if the device is claimed and successfully configured.
5167 * returns non-zero error code in case of any failure
5169 static int pmcraid_probe(struct pci_dev *pdev,
5170 const struct pci_device_id *dev_id)
5172 struct pmcraid_instance *pinstance;
5173 struct Scsi_Host *host;
5174 void __iomem *mapped_pci_addr;
5175 int rc = PCIBIOS_SUCCESSFUL;
5177 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5179 ("maximum number(%d) of supported adapters reached\n",
5180 atomic_read(&pmcraid_adapter_count));
5184 atomic_inc(&pmcraid_adapter_count);
5185 rc = pci_enable_device(pdev);
5188 dev_err(&pdev->dev, "Cannot enable adapter\n");
5189 atomic_dec(&pmcraid_adapter_count);
5193 dev_info(&pdev->dev,
5194 "Found new IOA(%x:%x), Total IOA count: %d\n",
5195 pdev->vendor, pdev->device,
5196 atomic_read(&pmcraid_adapter_count));
5198 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5202 "Couldn't register memory range of registers\n");
5203 goto out_disable_device;
5206 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5208 if (!mapped_pci_addr) {
5209 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5211 goto out_release_regions;
5214 pci_set_master(pdev);
5216 /* Firmware requires the system bus address of IOARCB to be within
5217 * 32-bit addressable range though it has 64-bit IOARRIN register.
5218 * However, firmware supports 64-bit streaming DMA buffers, whereas
5219 * coherent buffers are to be 32-bit. Since dma_alloc_coherent always
5220 * returns memory within 4GB (if not, change this logic), coherent
5221 * buffers are within firmware acceptable address ranges.
5223 if (sizeof(dma_addr_t) == 4 ||
5224 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)))
5225 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
5227 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5228 * bit mask for dma_alloc_coherent to return addresses within 4GB
5231 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
5234 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5238 host = scsi_host_alloc(&pmcraid_host_template,
5239 sizeof(struct pmcraid_instance));
5242 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5247 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5248 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5249 host->unique_id = host->host_no;
5250 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5251 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5253 /* zero out entire instance structure */
5254 pinstance = (struct pmcraid_instance *)host->hostdata;
5255 memset(pinstance, 0, sizeof(*pinstance));
5257 pinstance->chip_cfg =
5258 (struct pmcraid_chip_details *)(dev_id->driver_data);
5260 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5263 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5264 goto out_scsi_host_put;
5267 pci_set_drvdata(pdev, pinstance);
5269 /* Save PCI config-space for use following the reset */
5270 rc = pci_save_state(pinstance->pdev);
5273 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5274 goto out_scsi_host_put;
5277 pmcraid_disable_interrupts(pinstance, ~0);
5279 rc = pmcraid_register_interrupt_handler(pinstance);
5282 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
5283 goto out_scsi_host_put;
5286 pmcraid_init_tasklets(pinstance);
5288 /* allocate verious buffers used by LLD.*/
5289 rc = pmcraid_init_buffers(pinstance);
5292 pmcraid_err("couldn't allocate memory blocks\n");
5293 goto out_unregister_isr;
5296 /* check the reset type required */
5297 pmcraid_reset_type(pinstance);
5299 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5301 /* Start IOA firmware initialization and bring card to Operational
5304 pmcraid_info("starting IOA initialization sequence\n");
5305 if (pmcraid_reset_bringup(pinstance)) {
5306 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5308 goto out_release_bufs;
5311 /* Add adapter instance into mid-layer list */
5312 rc = scsi_add_host(pinstance->host, &pdev->dev);
5314 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
5315 goto out_release_bufs;
5318 scsi_scan_host(pinstance->host);
5320 rc = pmcraid_setup_chrdev(pinstance);
5323 pmcraid_err("couldn't create mgmt interface, error: %x\n",
5325 goto out_remove_host;
5328 /* Schedule worker thread to handle CCN and take care of adding and
5329 * removing devices to OS
5331 atomic_set(&pinstance->expose_resources, 1);
5332 schedule_work(&pinstance->worker_q);
5336 scsi_remove_host(host);
5339 pmcraid_release_buffers(pinstance);
5342 pmcraid_kill_tasklets(pinstance);
5343 pmcraid_unregister_interrupt_handler(pinstance);
5346 scsi_host_put(host);
5349 iounmap(mapped_pci_addr);
5351 out_release_regions:
5352 pci_release_regions(pdev);
5355 atomic_dec(&pmcraid_adapter_count);
5356 pci_disable_device(pdev);
5360 static SIMPLE_DEV_PM_OPS(pmcraid_pm_ops, pmcraid_suspend, pmcraid_resume);
5363 * PCI driver structure of pmcraid driver
5365 static struct pci_driver pmcraid_driver = {
5366 .name = PMCRAID_DRIVER_NAME,
5367 .id_table = pmcraid_pci_table,
5368 .probe = pmcraid_probe,
5369 .remove = pmcraid_remove,
5370 .driver.pm = &pmcraid_pm_ops,
5371 .shutdown = pmcraid_shutdown
5375 * pmcraid_init - module load entry point
5377 static int __init pmcraid_init(void)
5382 pmcraid_info("%s Device Driver version: %s\n",
5383 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
5385 error = alloc_chrdev_region(&dev, 0,
5386 PMCRAID_MAX_ADAPTERS,
5390 pmcraid_err("failed to get a major number for adapters\n");
5394 pmcraid_major = MAJOR(dev);
5396 error = class_register(&pmcraid_class);
5399 pmcraid_err("failed to register with sysfs, error = %x\n",
5401 goto out_unreg_chrdev;
5404 error = pmcraid_netlink_init();
5407 class_unregister(&pmcraid_class);
5408 goto out_unreg_chrdev;
5411 error = pci_register_driver(&pmcraid_driver);
5416 pmcraid_err("failed to register pmcraid driver, error = %x\n",
5418 class_unregister(&pmcraid_class);
5419 pmcraid_netlink_release();
5422 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
5429 * pmcraid_exit - module unload entry point
5431 static void __exit pmcraid_exit(void)
5433 pmcraid_netlink_release();
5434 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
5435 PMCRAID_MAX_ADAPTERS);
5436 pci_unregister_driver(&pmcraid_driver);
5437 class_unregister(&pmcraid_class);
5440 module_init(pmcraid_init);
5441 module_exit(pmcraid_exit);