2 * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
4 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
7 * Copyright (C) 2008, 2009 PMC Sierra Inc
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
26 #include <linux/init.h>
27 #include <linux/types.h>
28 #include <linux/errno.h>
29 #include <linux/kernel.h>
30 #include <linux/ioport.h>
31 #include <linux/delay.h>
32 #include <linux/pci.h>
33 #include <linux/wait.h>
34 #include <linux/spinlock.h>
35 #include <linux/sched.h>
36 #include <linux/interrupt.h>
37 #include <linux/blkdev.h>
38 #include <linux/firmware.h>
39 #include <linux/module.h>
40 #include <linux/moduleparam.h>
41 #include <linux/hdreg.h>
42 #include <linux/version.h>
44 #include <linux/slab.h>
46 #include <asm/processor.h>
47 #include <linux/libata.h>
48 #include <linux/mutex.h>
49 #include <scsi/scsi.h>
50 #include <scsi/scsi_host.h>
51 #include <scsi/scsi_device.h>
52 #include <scsi/scsi_tcq.h>
53 #include <scsi/scsi_eh.h>
54 #include <scsi/scsi_cmnd.h>
55 #include <scsi/scsicam.h>
60 * Module configuration parameters
62 static unsigned int pmcraid_debug_log;
63 static unsigned int pmcraid_disable_aen;
64 static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
65 static unsigned int pmcraid_enable_msix;
68 * Data structures to support multiple adapters by the LLD.
69 * pmcraid_adapter_count - count of configured adapters
71 static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
74 * Supporting user-level control interface through IOCTL commands.
75 * pmcraid_major - major number to use
76 * pmcraid_minor - minor number(s) to use
78 static unsigned int pmcraid_major;
79 static struct class *pmcraid_class;
80 DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
85 MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
86 MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION(PMCRAID_DRIVER_VERSION);
90 module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
91 MODULE_PARM_DESC(log_level,
92 "Enables firmware error code logging, default :1 high-severity"
93 " errors, 2: all errors including high-severity errors,"
94 " 0: disables logging");
96 module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
97 MODULE_PARM_DESC(debug,
98 "Enable driver verbose message logging. Set 1 to enable."
101 module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
102 MODULE_PARM_DESC(disable_aen,
103 "Disable driver aen notifications to apps. Set 1 to disable."
106 /* chip specific constants for PMC MaxRAID controllers (same for
109 static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
114 .global_intr_mask = 0x00034,
115 .ioa_host_intr = 0x0009C,
116 .ioa_host_intr_clr = 0x000A0,
117 .ioa_host_msix_intr = 0x7FC40,
118 .ioa_host_mask = 0x7FC28,
119 .ioa_host_mask_clr = 0x7FC28,
120 .host_ioa_intr = 0x00020,
121 .host_ioa_intr_clr = 0x00020,
122 .transop_timeout = 300
127 * PCI device ids supported by pmcraid driver
129 static struct pci_device_id pmcraid_pci_table[] __devinitdata = {
130 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
131 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
136 MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
141 * pmcraid_slave_alloc - Prepare for commands to a device
142 * @scsi_dev: scsi device struct
144 * This function is called by mid-layer prior to sending any command to the new
145 * device. Stores resource entry details of the device in scsi_device struct.
146 * Queuecommand uses the resource handle and other details to fill up IOARCB
147 * while sending commands to the device.
150 * 0 on success / -ENXIO if device does not exist
152 static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
154 struct pmcraid_resource_entry *temp, *res = NULL;
155 struct pmcraid_instance *pinstance;
157 unsigned long lock_flags;
161 pinstance = shost_priv(scsi_dev->host);
163 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
165 /* Driver exposes VSET and GSCSI resources only; all other device types
166 * are not exposed. Resource list is synchronized using resource lock
167 * so any traversal or modifications to the list should be done inside
170 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
171 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
173 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
174 if (RES_IS_VSET(temp->cfg_entry)) {
175 if (fw_version <= PMCRAID_FW_VERSION_1)
176 target = temp->cfg_entry.unique_flags1;
178 target = temp->cfg_entry.array_id & 0xFF;
180 if (target > PMCRAID_MAX_VSET_TARGETS)
182 bus = PMCRAID_VSET_BUS_ID;
184 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
185 target = RES_TARGET(temp->cfg_entry.resource_address);
186 bus = PMCRAID_PHYS_BUS_ID;
187 lun = RES_LUN(temp->cfg_entry.resource_address);
192 if (bus == scsi_dev->channel &&
193 target == scsi_dev->id &&
194 lun == scsi_dev->lun) {
201 res->scsi_dev = scsi_dev;
202 scsi_dev->hostdata = res;
203 res->change_detected = 0;
204 atomic_set(&res->read_failures, 0);
205 atomic_set(&res->write_failures, 0);
208 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
213 * pmcraid_slave_configure - Configures a SCSI device
214 * @scsi_dev: scsi device struct
216 * This function is executed by SCSI mid layer just after a device is first
217 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
218 * timeout value (default 30s) will be over-written to a higher value (60s)
219 * and max_sectors value will be over-written to 512. It also sets queue depth
220 * to host->cmd_per_lun value
225 static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
227 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
232 /* LLD exposes VSETs and Enclosure devices only */
233 if (RES_IS_GSCSI(res->cfg_entry) &&
234 scsi_dev->type != TYPE_ENCLOSURE)
237 pmcraid_info("configuring %x:%x:%x:%x\n",
238 scsi_dev->host->unique_id,
243 if (RES_IS_GSCSI(res->cfg_entry)) {
244 scsi_dev->allow_restart = 1;
245 } else if (RES_IS_VSET(res->cfg_entry)) {
246 scsi_dev->allow_restart = 1;
247 blk_queue_rq_timeout(scsi_dev->request_queue,
248 PMCRAID_VSET_IO_TIMEOUT);
249 blk_queue_max_hw_sectors(scsi_dev->request_queue,
250 PMCRAID_VSET_MAX_SECTORS);
253 if (scsi_dev->tagged_supported &&
254 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
255 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
256 scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
257 scsi_dev->host->cmd_per_lun);
259 scsi_adjust_queue_depth(scsi_dev, 0,
260 scsi_dev->host->cmd_per_lun);
267 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
269 * @scsi_dev: scsi device struct
271 * This is called by mid-layer before removing a device. Pointer assignments
272 * done in pmcraid_slave_alloc will be reset to NULL here.
277 static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
279 struct pmcraid_resource_entry *res;
281 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
284 res->scsi_dev = NULL;
286 scsi_dev->hostdata = NULL;
290 * pmcraid_change_queue_depth - Change the device's queue depth
291 * @scsi_dev: scsi device struct
292 * @depth: depth to set
293 * @reason: calling context
298 static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
301 if (reason != SCSI_QDEPTH_DEFAULT)
304 if (depth > PMCRAID_MAX_CMD_PER_LUN)
305 depth = PMCRAID_MAX_CMD_PER_LUN;
307 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
309 return scsi_dev->queue_depth;
313 * pmcraid_change_queue_type - Change the device's queue type
314 * @scsi_dev: scsi device struct
315 * @tag: type of tags to use
318 * actual queue type set
320 static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
322 struct pmcraid_resource_entry *res;
324 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
326 if ((res) && scsi_dev->tagged_supported &&
327 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
328 scsi_set_tag_type(scsi_dev, tag);
331 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
333 scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
342 * pmcraid_init_cmdblk - initializes a command block
344 * @cmd: pointer to struct pmcraid_cmd to be initialized
345 * @index: if >=0 first time initialization; otherwise reinitialization
350 void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
352 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
353 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
356 /* first time initialization (called from probe) */
358 offsetof(struct pmcraid_control_block, ioasa);
361 ioarcb->response_handle = cpu_to_le32(index << 2);
362 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
363 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
364 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
366 /* re-initialization of various lengths, called once command is
369 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
371 ioarcb->request_flags0 = 0;
372 ioarcb->request_flags1 = 0;
373 ioarcb->cmd_timeout = 0;
374 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
375 ioarcb->ioadl_bus_addr = 0;
376 ioarcb->ioadl_length = 0;
377 ioarcb->data_transfer_length = 0;
378 ioarcb->add_cmd_param_length = 0;
379 ioarcb->add_cmd_param_offset = 0;
380 cmd->ioa_cb->ioasa.ioasc = 0;
381 cmd->ioa_cb->ioasa.residual_data_length = 0;
385 cmd->cmd_done = NULL;
386 cmd->scsi_cmd = NULL;
388 cmd->completion_req = 0;
389 cmd->sense_buffer = 0;
390 cmd->sense_buffer_dma = 0;
392 init_timer(&cmd->timer);
396 * pmcraid_reinit_cmdblk - reinitialize a command block
398 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
403 static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
405 pmcraid_init_cmdblk(cmd, -1);
409 * pmcraid_get_free_cmd - get a free cmd block from command block pool
410 * @pinstance: adapter instance structure
413 * returns pointer to cmd block or NULL if no blocks are available
415 static struct pmcraid_cmd *pmcraid_get_free_cmd(
416 struct pmcraid_instance *pinstance
419 struct pmcraid_cmd *cmd = NULL;
420 unsigned long lock_flags;
422 /* free cmd block list is protected by free_pool_lock */
423 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
425 if (!list_empty(&pinstance->free_cmd_pool)) {
426 cmd = list_entry(pinstance->free_cmd_pool.next,
427 struct pmcraid_cmd, free_list);
428 list_del(&cmd->free_list);
430 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
432 /* Initialize the command block before giving it the caller */
434 pmcraid_reinit_cmdblk(cmd);
439 * pmcraid_return_cmd - return a completed command block back into free pool
440 * @cmd: pointer to the command block
445 void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
447 struct pmcraid_instance *pinstance = cmd->drv_inst;
448 unsigned long lock_flags;
450 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
451 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
452 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
456 * pmcraid_read_interrupts - reads IOA interrupts
458 * @pinstance: pointer to adapter instance structure
461 * interrupts read from IOA
463 static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
465 return (pinstance->interrupt_mode) ?
466 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
467 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
471 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
473 * @pinstance: pointer to per adapter instance structure
474 * @intrs: interrupts to disable
479 static void pmcraid_disable_interrupts(
480 struct pmcraid_instance *pinstance,
484 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
485 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
487 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
488 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
489 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
491 if (!pinstance->interrupt_mode) {
493 pinstance->int_regs.ioa_host_interrupt_mask_reg);
494 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
499 * pmcraid_enable_interrupts - Enables specified interrupts
501 * @pinstance: pointer to per adapter instance structure
502 * @intr: interrupts to enable
507 static void pmcraid_enable_interrupts(
508 struct pmcraid_instance *pinstance,
512 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
513 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
515 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
517 if (!pinstance->interrupt_mode) {
519 pinstance->int_regs.ioa_host_interrupt_mask_reg);
520 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
523 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
524 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
525 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
529 * pmcraid_clr_trans_op - clear trans to op interrupt
531 * @pinstance: pointer to per adapter instance structure
536 static void pmcraid_clr_trans_op(
537 struct pmcraid_instance *pinstance
540 unsigned long lock_flags;
542 if (!pinstance->interrupt_mode) {
543 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
544 pinstance->int_regs.ioa_host_interrupt_mask_reg);
545 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
546 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
547 pinstance->int_regs.ioa_host_interrupt_clr_reg);
548 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
551 if (pinstance->reset_cmd != NULL) {
552 del_timer(&pinstance->reset_cmd->timer);
554 pinstance->host->host_lock, lock_flags);
555 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
556 spin_unlock_irqrestore(
557 pinstance->host->host_lock, lock_flags);
562 * pmcraid_reset_type - Determine the required reset type
563 * @pinstance: pointer to adapter instance structure
565 * IOA requires hard reset if any of the following conditions is true.
566 * 1. If HRRQ valid interrupt is not masked
567 * 2. IOA reset alert doorbell is set
568 * 3. If there are any error interrupts
570 static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
576 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
577 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
578 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
580 if ((mask & INTRS_HRRQ_VALID) == 0 ||
581 (alerts & DOORBELL_IOA_RESET_ALERT) ||
582 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
583 pmcraid_info("IOA requires hard reset\n");
584 pinstance->ioa_hard_reset = 1;
587 /* If unit check is active, trigger the dump */
588 if (intrs & INTRS_IOA_UNIT_CHECK)
589 pinstance->ioa_unit_check = 1;
593 * pmcraid_bist_done - completion function for PCI BIST
594 * @cmd: pointer to reset command
599 static void pmcraid_ioa_reset(struct pmcraid_cmd *);
601 static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
603 struct pmcraid_instance *pinstance = cmd->drv_inst;
604 unsigned long lock_flags;
608 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
610 /* If PCI config space can't be accessed wait for another two secs */
611 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
612 cmd->time_left > 0) {
613 pmcraid_info("BIST not complete, waiting another 2 secs\n");
614 cmd->timer.expires = jiffies + cmd->time_left;
616 cmd->timer.data = (unsigned long)cmd;
617 cmd->timer.function =
618 (void (*)(unsigned long))pmcraid_bist_done;
619 add_timer(&cmd->timer);
622 pmcraid_info("BIST is complete, proceeding with reset\n");
623 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
624 pmcraid_ioa_reset(cmd);
625 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
630 * pmcraid_start_bist - starts BIST
631 * @cmd: pointer to reset cmd
635 static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
637 struct pmcraid_instance *pinstance = cmd->drv_inst;
638 u32 doorbells, intrs;
640 /* proceed with bist and wait for 2 seconds */
641 iowrite32(DOORBELL_IOA_START_BIST,
642 pinstance->int_regs.host_ioa_interrupt_reg);
643 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
644 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
645 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
648 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
649 cmd->timer.data = (unsigned long)cmd;
650 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
651 cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
652 add_timer(&cmd->timer);
656 * pmcraid_reset_alert_done - completion routine for reset_alert
657 * @cmd: pointer to command block used in reset sequence
661 static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
663 struct pmcraid_instance *pinstance = cmd->drv_inst;
664 u32 status = ioread32(pinstance->ioa_status);
665 unsigned long lock_flags;
667 /* if the critical operation in progress bit is set or the wait times
668 * out, invoke reset engine to proceed with hard reset. If there is
669 * some more time to wait, restart the timer
671 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
672 cmd->time_left <= 0) {
673 pmcraid_info("critical op is reset proceeding with reset\n");
674 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
675 pmcraid_ioa_reset(cmd);
676 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
678 pmcraid_info("critical op is not yet reset waiting again\n");
679 /* restart timer if some more time is available to wait */
680 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
681 cmd->timer.data = (unsigned long)cmd;
682 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
683 cmd->timer.function =
684 (void (*)(unsigned long))pmcraid_reset_alert_done;
685 add_timer(&cmd->timer);
690 * pmcraid_reset_alert - alerts IOA for a possible reset
691 * @cmd : command block to be used for reset sequence.
694 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
695 * successfully written to IOA. Returns non-zero in case pci_config_space
698 static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
699 static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
701 struct pmcraid_instance *pinstance = cmd->drv_inst;
706 /* If we are able to access IOA PCI config space, alert IOA that we are
707 * going to reset it soon. This enables IOA to preserv persistent error
708 * data if any. In case memory space is not accessible, proceed with
711 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
712 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
714 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
715 * reset IOA doesn't generate any interrupts when CRITICAL
716 * OPERATION bit is reset. A timer is started to wait for this
719 cmd->time_left = PMCRAID_RESET_TIMEOUT;
720 cmd->timer.data = (unsigned long)cmd;
721 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
722 cmd->timer.function =
723 (void (*)(unsigned long))pmcraid_reset_alert_done;
724 add_timer(&cmd->timer);
726 iowrite32(DOORBELL_IOA_RESET_ALERT,
727 pinstance->int_regs.host_ioa_interrupt_reg);
729 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
730 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
732 pmcraid_info("PCI config is not accessible starting BIST\n");
733 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
734 pmcraid_start_bist(cmd);
739 * pmcraid_timeout_handler - Timeout handler for internally generated ops
741 * @cmd : pointer to command structure, that got timedout
743 * This function blocks host requests and initiates an adapter reset.
748 static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
750 struct pmcraid_instance *pinstance = cmd->drv_inst;
751 unsigned long lock_flags;
753 dev_info(&pinstance->pdev->dev,
754 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
755 cmd->ioa_cb->ioarcb.cdb[0]);
757 /* Command timeouts result in hard reset sequence. The command that got
758 * timed out may be the one used as part of reset sequence. In this
759 * case restart reset sequence using the same command block even if
760 * reset is in progress. Otherwise fail this command and get a free
761 * command block to restart the reset sequence.
763 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
764 if (!pinstance->ioa_reset_in_progress) {
765 pinstance->ioa_reset_attempts = 0;
766 cmd = pmcraid_get_free_cmd(pinstance);
768 /* If we are out of command blocks, just return here itself.
769 * Some other command's timeout handler can do the reset job
772 spin_unlock_irqrestore(pinstance->host->host_lock,
774 pmcraid_err("no free cmnd block for timeout handler\n");
778 pinstance->reset_cmd = cmd;
779 pinstance->ioa_reset_in_progress = 1;
781 pmcraid_info("reset is already in progress\n");
783 if (pinstance->reset_cmd != cmd) {
784 /* This command should have been given to IOA, this
785 * command will be completed by fail_outstanding_cmds
788 pmcraid_err("cmd is pending but reset in progress\n");
791 /* If this command was being used as part of the reset
792 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
793 * causes fail_outstanding_commands not to return the command
794 * block back to free pool
796 if (cmd == pinstance->reset_cmd)
797 cmd->cmd_done = pmcraid_ioa_reset;
800 /* Notify apps of important IOA bringup/bringdown sequences */
801 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
802 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
803 pmcraid_notify_ioastate(pinstance,
804 PMC_DEVICE_EVENT_RESET_START);
806 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
807 scsi_block_requests(pinstance->host);
808 pmcraid_reset_alert(cmd);
809 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
813 * pmcraid_internal_done - completion routine for internally generated cmds
815 * @cmd: command that got response from IOA
820 static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
822 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
823 cmd->ioa_cb->ioarcb.cdb[0],
824 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
826 /* Some of the internal commands are sent with callers blocking for the
827 * response. Same will be indicated as part of cmd->completion_req
828 * field. Response path needs to wake up any waiters waiting for cmd
829 * completion if this flag is set.
831 if (cmd->completion_req) {
832 cmd->completion_req = 0;
833 complete(&cmd->wait_for_completion);
836 /* most of the internal commands are completed by caller itself, so
837 * no need to return the command block back to free pool until we are
838 * required to do so (e.g once done with initialization).
842 pmcraid_return_cmd(cmd);
847 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
849 * @cmd: command that got response from IOA
851 * This routine is called after driver re-reads configuration table due to a
852 * lost CCN. It returns the command block back to free pool and schedules
853 * worker thread to add/delete devices into the system.
858 static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
860 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
861 cmd->ioa_cb->ioarcb.cdb[0],
862 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
866 pmcraid_return_cmd(cmd);
868 pmcraid_info("scheduling worker for config table reinitialization\n");
869 schedule_work(&cmd->drv_inst->worker_q);
873 * pmcraid_erp_done - Process completion of SCSI error response from device
874 * @cmd: pmcraid_command
876 * This function copies the sense buffer into the scsi_cmd struct and completes
877 * scsi_cmd by calling scsi_done function.
882 static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
884 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
885 struct pmcraid_instance *pinstance = cmd->drv_inst;
886 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
888 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
889 scsi_cmd->result |= (DID_ERROR << 16);
890 scmd_printk(KERN_INFO, scsi_cmd,
891 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
892 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
895 /* if we had allocated sense buffers for request sense, copy the sense
896 * release the buffers
898 if (cmd->sense_buffer != NULL) {
899 memcpy(scsi_cmd->sense_buffer,
901 SCSI_SENSE_BUFFERSIZE);
902 pci_free_consistent(pinstance->pdev,
903 SCSI_SENSE_BUFFERSIZE,
904 cmd->sense_buffer, cmd->sense_buffer_dma);
905 cmd->sense_buffer = NULL;
906 cmd->sense_buffer_dma = 0;
909 scsi_dma_unmap(scsi_cmd);
910 pmcraid_return_cmd(cmd);
911 scsi_cmd->scsi_done(scsi_cmd);
915 * pmcraid_fire_command - sends an IOA command to adapter
917 * This function adds the given block into pending command list
918 * and returns without waiting
920 * @cmd : command to be sent to the device
925 static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
927 struct pmcraid_instance *pinstance = cmd->drv_inst;
928 unsigned long lock_flags;
930 /* Add this command block to pending cmd pool. We do this prior to
931 * writting IOARCB to ioarrin because IOA might complete the command
932 * by the time we are about to add it to the list. Response handler
933 * (isr/tasklet) looks for cmd block in the pending pending list.
935 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
936 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
937 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
938 atomic_inc(&pinstance->outstanding_cmds);
940 /* driver writes lower 32-bit value of IOARCB address only */
942 iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
947 * pmcraid_send_cmd - fires a command to IOA
949 * This function also sets up timeout function, and command completion
952 * @cmd: pointer to the command block to be fired to IOA
953 * @cmd_done: command completion function, called once IOA responds
954 * @timeout: timeout to wait for this command completion
955 * @timeout_func: timeout handler
960 static void pmcraid_send_cmd(
961 struct pmcraid_cmd *cmd,
962 void (*cmd_done) (struct pmcraid_cmd *),
963 unsigned long timeout,
964 void (*timeout_func) (struct pmcraid_cmd *)
967 /* initialize done function */
968 cmd->cmd_done = cmd_done;
971 /* setup timeout handler */
972 cmd->timer.data = (unsigned long)cmd;
973 cmd->timer.expires = jiffies + timeout;
974 cmd->timer.function = (void (*)(unsigned long))timeout_func;
975 add_timer(&cmd->timer);
978 /* fire the command to IOA */
979 _pmcraid_fire_command(cmd);
983 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
984 * @cmd: pointer to the command block used for sending IOA shutdown command
989 static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
991 struct pmcraid_instance *pinstance = cmd->drv_inst;
992 unsigned long lock_flags;
994 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
995 pmcraid_ioa_reset(cmd);
996 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1000 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
1002 * @cmd: pointer to the command block used as part of reset sequence
1007 static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
1009 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
1010 cmd->ioa_cb->ioarcb.cdb[0],
1011 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1013 /* Note that commands sent during reset require next command to be sent
1014 * to IOA. Hence reinit the done function as well as timeout function
1016 pmcraid_reinit_cmdblk(cmd);
1017 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
1018 cmd->ioa_cb->ioarcb.resource_handle =
1019 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1020 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
1021 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
1023 /* fire shutdown command to hardware. */
1024 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
1025 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
1027 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
1029 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
1030 PMCRAID_SHUTDOWN_TIMEOUT,
1031 pmcraid_timeout_handler);
1035 * pmcraid_get_fwversion_done - completion function for get_fwversion
1037 * @cmd: pointer to command block used to send INQUIRY command
1042 static void pmcraid_querycfg(struct pmcraid_cmd *);
1044 static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
1046 struct pmcraid_instance *pinstance = cmd->drv_inst;
1047 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1048 unsigned long lock_flags;
1050 /* configuration table entry size depends on firmware version. If fw
1051 * version is not known, it is not possible to interpret IOA config
1055 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
1056 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1057 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1058 pmcraid_reset_alert(cmd);
1059 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1061 pmcraid_querycfg(cmd);
1066 * pmcraid_get_fwversion - reads firmware version information
1068 * @cmd: pointer to command block used to send INQUIRY command
1073 static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1075 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1076 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
1077 struct pmcraid_instance *pinstance = cmd->drv_inst;
1078 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1080 pmcraid_reinit_cmdblk(cmd);
1081 ioarcb->request_type = REQ_TYPE_SCSI;
1082 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1083 ioarcb->cdb[0] = INQUIRY;
1085 ioarcb->cdb[2] = 0xD0;
1086 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1087 ioarcb->cdb[4] = data_size & 0xFF;
1089 /* Since entire inquiry data it can be part of IOARCB itself
1091 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1092 offsetof(struct pmcraid_ioarcb,
1093 add_data.u.ioadl[0]));
1094 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1095 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
1097 ioarcb->request_flags0 |= NO_LINK_DESCS;
1098 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1099 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1100 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1101 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1102 ioadl->data_len = cpu_to_le32(data_size);
1104 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1105 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1109 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1110 * @cmd: pointer to command block to be used for identify hrrq
1115 static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1117 struct pmcraid_instance *pinstance = cmd->drv_inst;
1118 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1119 int index = cmd->hrrq_index;
1120 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1121 u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
1122 void (*done_function)(struct pmcraid_cmd *);
1124 pmcraid_reinit_cmdblk(cmd);
1125 cmd->hrrq_index = index + 1;
1127 if (cmd->hrrq_index < pinstance->num_hrrq) {
1128 done_function = pmcraid_identify_hrrq;
1130 cmd->hrrq_index = 0;
1131 done_function = pmcraid_get_fwversion;
1134 /* Initialize ioarcb */
1135 ioarcb->request_type = REQ_TYPE_IOACMD;
1136 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1138 /* initialize the hrrq number where IOA will respond to this command */
1139 ioarcb->hrrq_id = index;
1140 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1141 ioarcb->cdb[1] = index;
1143 /* IOA expects 64-bit pci address to be written in B.E format
1144 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1146 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1147 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
1149 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1150 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1152 /* Subsequent commands require HRRQ identification to be successful.
1153 * Note that this gets called even during reset from SCSI mid-layer
1156 pmcraid_send_cmd(cmd, done_function,
1157 PMCRAID_INTERNAL_TIMEOUT,
1158 pmcraid_timeout_handler);
1161 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1162 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1165 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1167 * @cmd: initialized command block pointer
1172 static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1174 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1175 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1177 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1179 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1183 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1185 * @pinstance: pointer to adapter instance structure
1189 * pointer to initialized pmcraid_cmd structure or NULL
1191 static struct pmcraid_cmd *pmcraid_init_hcam
1193 struct pmcraid_instance *pinstance,
1197 struct pmcraid_cmd *cmd;
1198 struct pmcraid_ioarcb *ioarcb;
1199 struct pmcraid_ioadl_desc *ioadl;
1200 struct pmcraid_hostrcb *hcam;
1201 void (*cmd_done) (struct pmcraid_cmd *);
1205 cmd = pmcraid_get_free_cmd(pinstance);
1208 pmcraid_err("no free command blocks for hcam\n");
1212 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
1213 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
1214 cmd_done = pmcraid_process_ccn;
1215 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1216 hcam = &pinstance->ccn;
1218 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1219 cmd_done = pmcraid_process_ldn;
1220 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1221 hcam = &pinstance->ldn;
1224 /* initialize command pointer used for HCAM registration */
1227 ioarcb = &cmd->ioa_cb->ioarcb;
1228 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1229 offsetof(struct pmcraid_ioarcb,
1230 add_data.u.ioadl[0]));
1231 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1232 ioadl = ioarcb->add_data.u.ioadl;
1234 /* Initialize ioarcb */
1235 ioarcb->request_type = REQ_TYPE_HCAM;
1236 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1237 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1238 ioarcb->cdb[1] = type;
1239 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1240 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1242 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1244 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
1245 ioadl[0].data_len = cpu_to_le32(rcb_size);
1246 ioadl[0].address = cpu_to_le32(dma);
1248 cmd->cmd_done = cmd_done;
1253 * pmcraid_send_hcam - Send an HCAM to IOA
1254 * @pinstance: ioa config struct
1257 * This function will send a Host Controlled Async command to IOA.
1262 static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1264 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1265 pmcraid_send_hcam_cmd(cmd);
1270 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1272 * @cmd: pointer to cmd that is used as cancelling command
1273 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1275 static void pmcraid_prepare_cancel_cmd(
1276 struct pmcraid_cmd *cmd,
1277 struct pmcraid_cmd *cmd_to_cancel
1280 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1281 __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
1283 /* Get the resource handle to where the command to be aborted has been
1286 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1287 ioarcb->request_type = REQ_TYPE_IOACMD;
1288 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1289 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1291 /* IOARCB address of the command to be cancelled is given in
1292 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1293 * IOARCB address are not masked.
1295 ioarcb_addr = cpu_to_be64(ioarcb_addr);
1296 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1300 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1302 * @cmd: command to be used as cancelling command
1304 * @cmd_done: op done function for the cancelling command
1306 static void pmcraid_cancel_hcam(
1307 struct pmcraid_cmd *cmd,
1309 void (*cmd_done) (struct pmcraid_cmd *)
1312 struct pmcraid_instance *pinstance;
1313 struct pmcraid_hostrcb *hcam;
1315 pinstance = cmd->drv_inst;
1316 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1317 &pinstance->ldn : &pinstance->ccn;
1319 /* prepare for cancelling previous hcam command. If the HCAM is
1320 * currently not pending with IOA, we would have hcam->cmd as non-null
1322 if (hcam->cmd == NULL)
1325 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1327 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1328 * schedule queuecommand while we are doing this
1330 pmcraid_send_cmd(cmd, cmd_done,
1331 PMCRAID_INTERNAL_TIMEOUT,
1332 pmcraid_timeout_handler);
1336 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1338 * @cmd: command block to be used for cancelling the HCAM
1340 static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1342 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1343 cmd->ioa_cb->ioarcb.cdb[0],
1344 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1346 pmcraid_reinit_cmdblk(cmd);
1348 pmcraid_cancel_hcam(cmd,
1349 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1350 pmcraid_ioa_shutdown);
1354 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1356 * @cmd: command block to be used for cancelling the HCAM
1358 static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1360 pmcraid_cancel_hcam(cmd,
1361 PMCRAID_HCAM_CODE_LOG_DATA,
1362 pmcraid_cancel_ccn);
1366 * pmcraid_expose_resource - check if the resource can be exposed to OS
1368 * @fw_version: firmware version code
1369 * @cfgte: pointer to configuration table entry of the resource
1372 * true if resource can be added to midlayer, false(0) otherwise
1374 static int pmcraid_expose_resource(u16 fw_version,
1375 struct pmcraid_config_table_entry *cfgte)
1379 if (cfgte->resource_type == RES_TYPE_VSET) {
1380 if (fw_version <= PMCRAID_FW_VERSION_1)
1381 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1383 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1384 (cfgte->unique_flags1 & 0x80) == 0);
1386 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
1387 retval = (RES_BUS(cfgte->resource_address) !=
1388 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1392 /* attributes supported by pmcraid_event_family */
1394 PMCRAID_AEN_ATTR_UNSPEC,
1395 PMCRAID_AEN_ATTR_EVENT,
1396 __PMCRAID_AEN_ATTR_MAX,
1398 #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1400 /* commands supported by pmcraid_event_family */
1402 PMCRAID_AEN_CMD_UNSPEC,
1403 PMCRAID_AEN_CMD_EVENT,
1404 __PMCRAID_AEN_CMD_MAX,
1406 #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1408 static struct genl_family pmcraid_event_family = {
1409 .id = GENL_ID_GENERATE,
1412 .maxattr = PMCRAID_AEN_ATTR_MAX
1416 * pmcraid_netlink_init - registers pmcraid_event_family
1419 * 0 if the pmcraid_event_family is successfully registered
1420 * with netlink generic, non-zero otherwise
1422 static int pmcraid_netlink_init(void)
1426 result = genl_register_family(&pmcraid_event_family);
1431 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1432 pmcraid_event_family.id);
1438 * pmcraid_netlink_release - unregisters pmcraid_event_family
1443 static void pmcraid_netlink_release(void)
1445 genl_unregister_family(&pmcraid_event_family);
1449 * pmcraid_notify_aen - sends event msg to user space application
1450 * @pinstance: pointer to adapter instance structure
1454 * 0 if success, error value in case of any failure.
1456 static int pmcraid_notify_aen(
1457 struct pmcraid_instance *pinstance,
1458 struct pmcraid_aen_msg *aen_msg,
1462 struct sk_buff *skb;
1464 u32 total_size, nla_genl_hdr_total_size;
1467 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1468 MINOR(pinstance->cdev.dev));
1469 aen_msg->length = data_size;
1471 data_size += sizeof(*aen_msg);
1473 total_size = nla_total_size(data_size);
1474 /* Add GENL_HDR to total_size */
1475 nla_genl_hdr_total_size =
1476 (total_size + (GENL_HDRLEN +
1477 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1479 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
1483 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1488 /* add the genetlink message header */
1489 msg_header = genlmsg_put(skb, 0, 0,
1490 &pmcraid_event_family, 0,
1491 PMCRAID_AEN_CMD_EVENT);
1493 pmcraid_err("failed to copy command details\n");
1498 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1501 pmcraid_err("failed to copy AEN attribute data\n");
1506 /* send genetlink multicast message to notify appplications */
1507 result = genlmsg_end(skb, msg_header);
1510 pmcraid_err("genlmsg_end failed\n");
1516 genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
1518 /* If there are no listeners, genlmsg_multicast may return non-zero
1522 pmcraid_info("error (%x) sending aen event message\n", result);
1527 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1528 * @pinstance: pointer adapter instance structure
1531 * 0 if success, error value in case of any failure
1533 static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1535 return pmcraid_notify_aen(pinstance,
1537 pinstance->ccn.hcam->data_len +
1538 sizeof(struct pmcraid_hcam_hdr));
1542 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1543 * @pinstance: pointer adapter instance structure
1546 * 0 if success, error value in case of any failure
1548 static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1550 return pmcraid_notify_aen(pinstance,
1552 pinstance->ldn.hcam->data_len +
1553 sizeof(struct pmcraid_hcam_hdr));
1557 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1558 * @pinstance: pointer adapter instance structure
1559 * @evt: controller state event to be sent
1562 * 0 if success, error value in case of any failure
1564 static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1566 pinstance->scn.ioa_state = evt;
1567 pmcraid_notify_aen(pinstance,
1568 &pinstance->scn.msg,
1573 * pmcraid_handle_config_change - Handle a config change from the adapter
1574 * @pinstance: pointer to per adapter instance structure
1580 static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1582 struct pmcraid_config_table_entry *cfg_entry;
1583 struct pmcraid_hcam_ccn *ccn_hcam;
1584 struct pmcraid_cmd *cmd;
1585 struct pmcraid_cmd *cfgcmd;
1586 struct pmcraid_resource_entry *res = NULL;
1587 unsigned long lock_flags;
1588 unsigned long host_lock_flags;
1590 u32 hidden_entry = 0;
1594 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1595 cfg_entry = &ccn_hcam->cfg_entry;
1596 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
1598 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1599 res: %x:%x:%x:%x\n",
1600 pinstance->ccn.hcam->ilid,
1601 pinstance->ccn.hcam->op_code,
1602 ((pinstance->ccn.hcam->timestamp1) |
1603 ((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
1604 pinstance->ccn.hcam->notification_type,
1605 pinstance->ccn.hcam->notification_lost,
1606 pinstance->ccn.hcam->flags,
1607 pinstance->host->unique_id,
1608 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1609 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1610 RES_BUS(cfg_entry->resource_address)),
1611 RES_IS_VSET(*cfg_entry) ?
1612 (fw_version <= PMCRAID_FW_VERSION_1 ?
1613 cfg_entry->unique_flags1 :
1614 cfg_entry->array_id & 0xFF) :
1615 RES_TARGET(cfg_entry->resource_address),
1616 RES_LUN(cfg_entry->resource_address));
1619 /* If this HCAM indicates a lost notification, read the config table */
1620 if (pinstance->ccn.hcam->notification_lost) {
1621 cfgcmd = pmcraid_get_free_cmd(pinstance);
1623 pmcraid_info("lost CCN, reading config table\b");
1624 pinstance->reinit_cfg_table = 1;
1625 pmcraid_querycfg(cfgcmd);
1627 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1629 goto out_notify_apps;
1632 /* If this resource is not going to be added to mid-layer, just notify
1633 * applications and return. If this notification is about hiding a VSET
1634 * resource, check if it was exposed already.
1636 if (pinstance->ccn.hcam->notification_type ==
1637 NOTIFICATION_TYPE_ENTRY_CHANGED &&
1638 cfg_entry->resource_type == RES_TYPE_VSET) {
1640 if (fw_version <= PMCRAID_FW_VERSION_1)
1641 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1643 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1645 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
1646 goto out_notify_apps;
1649 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1650 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1651 rc = memcmp(&res->cfg_entry.resource_address,
1652 &cfg_entry->resource_address,
1653 sizeof(cfg_entry->resource_address));
1663 spin_unlock_irqrestore(&pinstance->resource_lock,
1665 goto out_notify_apps;
1668 /* If there are more number of resources than what driver can
1669 * manage, do not notify the applications about the CCN. Just
1670 * ignore this notifications and re-register the same HCAM
1672 if (list_empty(&pinstance->free_res_q)) {
1673 spin_unlock_irqrestore(&pinstance->resource_lock,
1675 pmcraid_err("too many resources attached\n");
1676 spin_lock_irqsave(pinstance->host->host_lock,
1678 pmcraid_send_hcam(pinstance,
1679 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1680 spin_unlock_irqrestore(pinstance->host->host_lock,
1685 res = list_entry(pinstance->free_res_q.next,
1686 struct pmcraid_resource_entry, queue);
1688 list_del(&res->queue);
1689 res->scsi_dev = NULL;
1690 res->reset_progress = 0;
1691 list_add_tail(&res->queue, &pinstance->used_res_q);
1694 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
1696 if (pinstance->ccn.hcam->notification_type ==
1697 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
1698 if (res->scsi_dev) {
1699 if (fw_version <= PMCRAID_FW_VERSION_1)
1700 res->cfg_entry.unique_flags1 &= 0x7F;
1702 res->cfg_entry.array_id &= 0xFF;
1703 res->change_detected = RES_CHANGE_DEL;
1704 res->cfg_entry.resource_handle =
1705 PMCRAID_INVALID_RES_HANDLE;
1706 schedule_work(&pinstance->worker_q);
1708 /* This may be one of the non-exposed resources */
1709 list_move_tail(&res->queue, &pinstance->free_res_q);
1711 } else if (!res->scsi_dev) {
1712 res->change_detected = RES_CHANGE_ADD;
1713 schedule_work(&pinstance->worker_q);
1715 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1719 /* Notify configuration changes to registered applications.*/
1720 if (!pmcraid_disable_aen)
1721 pmcraid_notify_ccn(pinstance);
1723 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1725 pmcraid_send_hcam_cmd(cmd);
1729 * pmcraid_get_error_info - return error string for an ioasc
1730 * @ioasc: ioasc code
1734 static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1737 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1738 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1739 return &pmcraid_ioasc_error_table[i];
1745 * pmcraid_ioasc_logger - log IOASC information based user-settings
1746 * @ioasc: ioasc code
1747 * @cmd: pointer to command that resulted in 'ioasc'
1749 void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1751 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1753 if (error_info == NULL ||
1754 cmd->drv_inst->current_log_level < error_info->log_level)
1757 /* log the error string */
1758 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1759 cmd->ioa_cb->ioarcb.cdb[0],
1760 cmd->ioa_cb->ioarcb.resource_handle,
1761 le32_to_cpu(ioasc), error_info->error_string);
1765 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1767 * @pinstance: pointer to per adapter instance structure
1772 static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1774 struct pmcraid_hcam_ldn *hcam_ldn;
1777 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1780 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1781 pinstance->ldn.hcam->ilid,
1782 pinstance->ldn.hcam->op_code,
1783 pinstance->ldn.hcam->notification_type,
1784 pinstance->ldn.hcam->notification_lost,
1785 pinstance->ldn.hcam->flags,
1786 pinstance->ldn.hcam->overlay_id);
1788 /* log only the errors, no need to log informational log entries */
1789 if (pinstance->ldn.hcam->notification_type !=
1790 NOTIFICATION_TYPE_ERROR_LOG)
1793 if (pinstance->ldn.hcam->notification_lost ==
1794 HOSTRCB_NOTIFICATIONS_LOST)
1795 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
1797 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1799 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1800 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
1801 dev_info(&pinstance->pdev->dev,
1802 "UnitAttention due to IOA Bus Reset\n");
1803 scsi_report_bus_reset(
1805 RES_BUS(hcam_ldn->error_log.fd_ra));
1812 * pmcraid_process_ccn - Op done function for a CCN.
1813 * @cmd: pointer to command struct
1815 * This function is the op done function for a configuration
1816 * change notification
1821 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1823 struct pmcraid_instance *pinstance = cmd->drv_inst;
1824 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1825 unsigned long lock_flags;
1827 pinstance->ccn.cmd = NULL;
1828 pmcraid_return_cmd(cmd);
1830 /* If driver initiated IOA reset happened while this hcam was pending
1831 * with IOA, or IOA bringdown sequence is in progress, no need to
1832 * re-register the hcam
1834 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1835 atomic_read(&pinstance->ccn.ignore) == 1) {
1838 dev_info(&pinstance->pdev->dev,
1839 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1840 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1841 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1842 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1844 pmcraid_handle_config_change(pinstance);
1849 * pmcraid_process_ldn - op done function for an LDN
1850 * @cmd: pointer to command block
1855 static void pmcraid_initiate_reset(struct pmcraid_instance *);
1856 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
1858 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1860 struct pmcraid_instance *pinstance = cmd->drv_inst;
1861 struct pmcraid_hcam_ldn *ldn_hcam =
1862 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1863 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1864 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1865 unsigned long lock_flags;
1867 /* return the command block back to freepool */
1868 pinstance->ldn.cmd = NULL;
1869 pmcraid_return_cmd(cmd);
1871 /* If driver initiated IOA reset happened while this hcam was pending
1872 * with IOA, no need to re-register the hcam as reset engine will do it
1873 * once reset sequence is complete
1875 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1876 atomic_read(&pinstance->ccn.ignore) == 1) {
1878 } else if (!ioasc) {
1879 pmcraid_handle_error_log(pinstance);
1880 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1881 spin_lock_irqsave(pinstance->host->host_lock,
1883 pmcraid_initiate_reset(pinstance);
1884 spin_unlock_irqrestore(pinstance->host->host_lock,
1888 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1889 pinstance->timestamp_error = 1;
1890 pmcraid_set_timestamp(cmd);
1893 dev_info(&pinstance->pdev->dev,
1894 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1896 /* send netlink message for HCAM notification if enabled */
1897 if (!pmcraid_disable_aen)
1898 pmcraid_notify_ldn(pinstance);
1900 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1902 pmcraid_send_hcam_cmd(cmd);
1906 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1908 * @pinstance: pointer per adapter instance structure
1913 static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1915 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1916 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1920 * pmcraid_unregister_hcams - cancel HCAMs registered already
1921 * @cmd: pointer to command used as part of reset sequence
1923 static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1925 struct pmcraid_instance *pinstance = cmd->drv_inst;
1927 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1928 * handling hcam response though it is not necessary. In order to
1929 * prevent this, set 'ignore', so that bring-down sequence doesn't
1930 * re-send any more hcams
1932 atomic_set(&pinstance->ccn.ignore, 1);
1933 atomic_set(&pinstance->ldn.ignore, 1);
1935 /* If adapter reset was forced as part of runtime reset sequence,
1936 * start the reset sequence. Reset will be triggered even in case
1939 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1940 pinstance->ioa_unit_check) {
1941 pinstance->force_ioa_reset = 0;
1942 pinstance->ioa_unit_check = 0;
1943 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1944 pmcraid_reset_alert(cmd);
1948 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1949 * one after the other. So CCN cancellation will be triggered by
1950 * pmcraid_cancel_ldn itself.
1952 pmcraid_cancel_ldn(cmd);
1956 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1957 * @pinstance: pointer to adapter instance structure
1959 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1961 static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1963 static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1967 pmcraid_reinit_buffers(pinstance);
1968 intrs = pmcraid_read_interrupts(pinstance);
1970 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1972 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
1973 if (!pinstance->interrupt_mode) {
1974 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1975 pinstance->int_regs.
1976 ioa_host_interrupt_mask_reg);
1977 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1978 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1987 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1988 * @cmd : pointer to reset command block
1993 static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1995 struct pmcraid_instance *pinstance = cmd->drv_inst;
1999 /* There will be an interrupt when Transition to Operational bit is
2000 * set so tasklet would execute next reset task. The timeout handler
2001 * would re-initiate a reset
2003 cmd->cmd_done = pmcraid_ioa_reset;
2004 cmd->timer.data = (unsigned long)cmd;
2005 cmd->timer.expires = jiffies +
2006 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
2007 cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
2009 if (!timer_pending(&cmd->timer))
2010 add_timer(&cmd->timer);
2012 /* Enable destructive diagnostics on IOA if it is not yet in
2015 doorbell = DOORBELL_RUNTIME_RESET |
2016 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
2018 /* Since we do RESET_ALERT and Start BIST we have to again write
2019 * MSIX Doorbell to indicate the interrupt mode
2021 if (pinstance->interrupt_mode) {
2022 iowrite32(DOORBELL_INTR_MODE_MSIX,
2023 pinstance->int_regs.host_ioa_interrupt_reg);
2024 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
2027 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
2028 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2029 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
2031 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2032 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2037 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2039 * @pinstance: pointer to adapter instance structure
2044 static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
2046 pmcraid_info("%s is not yet implemented\n", __func__);
2050 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2051 * @pinstance: pointer to adapter instance structure
2053 * This function fails all outstanding ops. If they are submitted to IOA
2054 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2055 * otherwise just completes the commands and returns the cmd blocks to free
2061 static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
2063 struct pmcraid_cmd *cmd, *temp;
2064 unsigned long lock_flags;
2066 /* pending command list is protected by pending_pool_lock. Its
2067 * traversal must be done as within this lock
2069 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2070 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
2072 list_del(&cmd->free_list);
2073 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2075 cmd->ioa_cb->ioasa.ioasc =
2076 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
2077 cmd->ioa_cb->ioasa.ilid =
2078 cpu_to_be32(PMCRAID_DRIVER_ILID);
2080 /* In case the command timer is still running */
2081 del_timer(&cmd->timer);
2083 /* If this is an IO command, complete it by invoking scsi_done
2084 * function. If this is one of the internal commands other
2085 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2088 if (cmd->scsi_cmd) {
2090 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2091 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2093 scsi_cmd->result |= DID_ERROR << 16;
2095 scsi_dma_unmap(scsi_cmd);
2096 pmcraid_return_cmd(cmd);
2098 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2099 le32_to_cpu(resp) >> 2,
2100 cmd->ioa_cb->ioarcb.cdb[0],
2102 scsi_cmd->scsi_done(scsi_cmd);
2103 } else if (cmd->cmd_done == pmcraid_internal_done ||
2104 cmd->cmd_done == pmcraid_erp_done) {
2106 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2107 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
2108 pmcraid_return_cmd(cmd);
2111 atomic_dec(&pinstance->outstanding_cmds);
2112 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2115 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2119 * pmcraid_ioa_reset - Implementation of IOA reset logic
2121 * @cmd: pointer to the cmd block to be used for entire reset process
2123 * This function executes most of the steps required for IOA reset. This gets
2124 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2125 * 'eh_' thread. Access to variables used for controlling the reset sequence is
2126 * synchronized using host lock. Various functions called during reset process
2127 * would make use of a single command block, pointer to which is also stored in
2128 * adapter instance structure.
2133 static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2135 struct pmcraid_instance *pinstance = cmd->drv_inst;
2136 u8 reset_complete = 0;
2138 pinstance->ioa_reset_in_progress = 1;
2140 if (pinstance->reset_cmd != cmd) {
2141 pmcraid_err("reset is called with different command block\n");
2142 pinstance->reset_cmd = cmd;
2145 pmcraid_info("reset_engine: state = %d, command = %p\n",
2146 pinstance->ioa_state, cmd);
2148 switch (pinstance->ioa_state) {
2150 case IOA_STATE_DEAD:
2151 /* If IOA is offline, whatever may be the reset reason, just
2152 * return. callers might be waiting on the reset wait_q, wake
2155 pmcraid_err("IOA is offline no reset is possible\n");
2159 case IOA_STATE_IN_BRINGDOWN:
2160 /* we enter here, once ioa shutdown command is processed by IOA
2161 * Alert IOA for a possible reset. If reset alert fails, IOA
2162 * goes through hard-reset
2164 pmcraid_disable_interrupts(pinstance, ~0);
2165 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2166 pmcraid_reset_alert(cmd);
2169 case IOA_STATE_UNKNOWN:
2170 /* We may be called during probe or resume. Some pre-processing
2171 * is required for prior to reset
2173 scsi_block_requests(pinstance->host);
2175 /* If asked to reset while IOA was processing responses or
2176 * there are any error responses then IOA may require
2179 if (pinstance->ioa_hard_reset == 0) {
2180 if (ioread32(pinstance->ioa_status) &
2181 INTRS_TRANSITION_TO_OPERATIONAL) {
2182 pmcraid_info("sticky bit set, bring-up\n");
2183 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2184 pmcraid_reinit_cmdblk(cmd);
2185 pmcraid_identify_hrrq(cmd);
2187 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2188 pmcraid_soft_reset(cmd);
2191 /* Alert IOA of a possible reset and wait for critical
2192 * operation in progress bit to reset
2194 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2195 pmcraid_reset_alert(cmd);
2199 case IOA_STATE_IN_RESET_ALERT:
2200 /* If critical operation in progress bit is reset or wait gets
2201 * timed out, reset proceeds with starting BIST on the IOA.
2202 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2203 * they are 3 or more, reset engine marks IOA dead and returns
2205 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2206 pmcraid_start_bist(cmd);
2209 case IOA_STATE_IN_HARD_RESET:
2210 pinstance->ioa_reset_attempts++;
2212 /* retry reset if we haven't reached maximum allowed limit */
2213 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2214 pinstance->ioa_reset_attempts = 0;
2215 pmcraid_err("IOA didn't respond marking it as dead\n");
2216 pinstance->ioa_state = IOA_STATE_DEAD;
2218 if (pinstance->ioa_bringdown)
2219 pmcraid_notify_ioastate(pinstance,
2220 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2222 pmcraid_notify_ioastate(pinstance,
2223 PMC_DEVICE_EVENT_RESET_FAILED);
2228 /* Once either bist or pci reset is done, restore PCI config
2229 * space. If this fails, proceed with hard reset again
2231 pci_restore_state(pinstance->pdev);
2233 /* fail all pending commands */
2234 pmcraid_fail_outstanding_cmds(pinstance);
2236 /* check if unit check is active, if so extract dump */
2237 if (pinstance->ioa_unit_check) {
2238 pmcraid_info("unit check is active\n");
2239 pinstance->ioa_unit_check = 0;
2240 pmcraid_get_dump(pinstance);
2241 pinstance->ioa_reset_attempts--;
2242 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2243 pmcraid_reset_alert(cmd);
2247 /* if the reset reason is to bring-down the ioa, we might be
2248 * done with the reset restore pci_config_space and complete
2251 if (pinstance->ioa_bringdown) {
2252 pmcraid_info("bringing down the adapter\n");
2253 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2254 pinstance->ioa_bringdown = 0;
2255 pinstance->ioa_state = IOA_STATE_UNKNOWN;
2256 pmcraid_notify_ioastate(pinstance,
2257 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
2260 /* bring-up IOA, so proceed with soft reset
2261 * Reinitialize hrrq_buffers and their indices also
2262 * enable interrupts after a pci_restore_state
2264 if (pmcraid_reset_enable_ioa(pinstance)) {
2265 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2266 pmcraid_info("bringing up the adapter\n");
2267 pmcraid_reinit_cmdblk(cmd);
2268 pmcraid_identify_hrrq(cmd);
2270 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2271 pmcraid_soft_reset(cmd);
2276 case IOA_STATE_IN_SOFT_RESET:
2277 /* TRANSITION TO OPERATIONAL is on so start initialization
2280 pmcraid_info("In softreset proceeding with bring-up\n");
2281 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2283 /* Initialization commands start with HRRQ identification. From
2284 * now on tasklet completes most of the commands as IOA is up
2285 * and intrs are enabled
2287 pmcraid_identify_hrrq(cmd);
2290 case IOA_STATE_IN_BRINGUP:
2291 /* we are done with bringing up of IOA, change the ioa_state to
2292 * operational and wake up any waiters
2294 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2298 case IOA_STATE_OPERATIONAL:
2300 /* When IOA is operational and a reset is requested, check for
2301 * the reset reason. If reset is to bring down IOA, unregister
2302 * HCAMs and initiate shutdown; if adapter reset is forced then
2303 * restart reset sequence again
2305 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2306 pinstance->force_ioa_reset == 0) {
2307 pmcraid_notify_ioastate(pinstance,
2308 PMC_DEVICE_EVENT_RESET_SUCCESS);
2311 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2312 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2313 pmcraid_reinit_cmdblk(cmd);
2314 pmcraid_unregister_hcams(cmd);
2319 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2320 * OPERATIONAL. Reset all control variables used during reset, wake up
2321 * any waiting threads and let the SCSI mid-layer send commands. Note
2322 * that host_lock must be held before invoking scsi_report_bus_reset.
2324 if (reset_complete) {
2325 pinstance->ioa_reset_in_progress = 0;
2326 pinstance->ioa_reset_attempts = 0;
2327 pinstance->reset_cmd = NULL;
2328 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2329 pinstance->ioa_bringdown = 0;
2330 pmcraid_return_cmd(cmd);
2332 /* If target state is to bring up the adapter, proceed with
2333 * hcam registration and resource exposure to mid-layer.
2335 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2336 pmcraid_register_hcams(pinstance);
2338 wake_up_all(&pinstance->reset_wait_q);
2345 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2346 * ISR/tasklet during error interrupts including IOA unit check. If reset
2347 * is already in progress, it just returns, otherwise initiates IOA reset
2348 * to bring IOA up to operational state.
2350 * @pinstance: pointer to adapter instance structure
2355 static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2357 struct pmcraid_cmd *cmd;
2359 /* If the reset is already in progress, just return, otherwise start
2360 * reset sequence and return
2362 if (!pinstance->ioa_reset_in_progress) {
2363 scsi_block_requests(pinstance->host);
2364 cmd = pmcraid_get_free_cmd(pinstance);
2367 pmcraid_err("no cmnd blocks for initiate_reset\n");
2371 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2372 pinstance->reset_cmd = cmd;
2373 pinstance->force_ioa_reset = 1;
2374 pmcraid_notify_ioastate(pinstance,
2375 PMC_DEVICE_EVENT_RESET_START);
2376 pmcraid_ioa_reset(cmd);
2381 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2383 * @pinstance: pointer adapter instance structure
2384 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2385 * @target_state: expected target state after reset
2387 * Note: This command initiates reset and waits for its completion. Hence this
2388 * should not be called from isr/timer/tasklet functions (timeout handlers,
2389 * error response handlers and interrupt handlers).
2392 * 1 in case ioa_state is not target_state, 0 otherwise.
2394 static int pmcraid_reset_reload(
2395 struct pmcraid_instance *pinstance,
2400 struct pmcraid_cmd *reset_cmd = NULL;
2401 unsigned long lock_flags;
2404 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2406 if (pinstance->ioa_reset_in_progress) {
2407 pmcraid_info("reset_reload: reset is already in progress\n");
2409 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2411 wait_event(pinstance->reset_wait_q,
2412 !pinstance->ioa_reset_in_progress);
2414 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2416 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2417 spin_unlock_irqrestore(pinstance->host->host_lock,
2419 pmcraid_info("reset_reload: IOA is dead\n");
2421 } else if (pinstance->ioa_state == target_state) {
2427 pmcraid_info("reset_reload: proceeding with reset\n");
2428 scsi_block_requests(pinstance->host);
2429 reset_cmd = pmcraid_get_free_cmd(pinstance);
2431 if (reset_cmd == NULL) {
2432 pmcraid_err("no free cmnd for reset_reload\n");
2433 spin_unlock_irqrestore(pinstance->host->host_lock,
2438 if (shutdown_type == SHUTDOWN_NORMAL)
2439 pinstance->ioa_bringdown = 1;
2441 pinstance->ioa_shutdown_type = shutdown_type;
2442 pinstance->reset_cmd = reset_cmd;
2443 pinstance->force_ioa_reset = reset;
2444 pmcraid_info("reset_reload: initiating reset\n");
2445 pmcraid_ioa_reset(reset_cmd);
2446 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2447 pmcraid_info("reset_reload: waiting for reset to complete\n");
2448 wait_event(pinstance->reset_wait_q,
2449 !pinstance->ioa_reset_in_progress);
2451 pmcraid_info("reset_reload: reset is complete !!\n");
2452 scsi_unblock_requests(pinstance->host);
2453 if (pinstance->ioa_state == target_state)
2461 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2463 * @pinstance: pointer to adapter instance structure
2466 * whatever is returned from pmcraid_reset_reload
2468 static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2470 return pmcraid_reset_reload(pinstance,
2476 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2478 * @pinstance: pointer to adapter instance structure
2481 * whatever is returned from pmcraid_reset_reload
2483 static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2485 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2487 return pmcraid_reset_reload(pinstance,
2489 IOA_STATE_OPERATIONAL);
2493 * pmcraid_request_sense - Send request sense to a device
2494 * @cmd: pmcraid command struct
2496 * This function sends a request sense to a device as a result of a check
2497 * condition. This method re-uses the same command block that failed earlier.
2499 static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2501 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2502 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2504 /* allocate DMAable memory for sense buffers */
2505 cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
2506 SCSI_SENSE_BUFFERSIZE,
2507 &cmd->sense_buffer_dma);
2509 if (cmd->sense_buffer == NULL) {
2511 ("couldn't allocate sense buffer for request sense\n");
2512 pmcraid_erp_done(cmd);
2516 /* re-use the command block */
2517 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2518 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2519 ioarcb->request_flags0 = (SYNC_COMPLETE |
2522 ioarcb->request_type = REQ_TYPE_SCSI;
2523 ioarcb->cdb[0] = REQUEST_SENSE;
2524 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2526 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2527 offsetof(struct pmcraid_ioarcb,
2528 add_data.u.ioadl[0]));
2529 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2531 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2533 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2534 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2535 ioadl->flags = IOADL_FLAGS_LAST_DESC;
2537 /* request sense might be called as part of error response processing
2538 * which runs in tasklets context. It is possible that mid-layer might
2539 * schedule queuecommand during this time, hence, writting to IOARRIN
2540 * must be protect by host_lock
2542 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2543 PMCRAID_REQUEST_SENSE_TIMEOUT,
2544 pmcraid_timeout_handler);
2548 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2549 * @cmd: command that failed
2550 * @sense: true if request_sense is required after cancel all
2552 * This function sends a cancel all to a device to clear the queue.
2554 static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
2556 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2557 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2558 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2559 void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
2560 : pmcraid_request_sense;
2562 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2563 ioarcb->request_flags0 = SYNC_OVERRIDE;
2564 ioarcb->request_type = REQ_TYPE_IOACMD;
2565 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2567 if (RES_IS_GSCSI(res->cfg_entry))
2568 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2570 ioarcb->ioadl_bus_addr = 0;
2571 ioarcb->ioadl_length = 0;
2572 ioarcb->data_transfer_length = 0;
2573 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
2575 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2576 * schedule queuecommand while we are doing this
2578 pmcraid_send_cmd(cmd, cmd_done,
2579 PMCRAID_REQUEST_SENSE_TIMEOUT,
2580 pmcraid_timeout_handler);
2584 * pmcraid_frame_auto_sense: frame fixed format sense information
2586 * @cmd: pointer to failing command block
2591 static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2593 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2594 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2595 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2596 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2597 u32 failing_lba = 0;
2599 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2600 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2602 if (RES_IS_VSET(res->cfg_entry) &&
2603 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2604 ioasa->u.vset.failing_lba_hi != 0) {
2606 sense_buf[0] = 0x72;
2607 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2608 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2609 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2613 sense_buf[9] = 0x0A;
2614 sense_buf[10] = 0x80;
2616 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2618 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2619 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2620 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2621 sense_buf[15] = failing_lba & 0x000000ff;
2623 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2625 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2626 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2627 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2628 sense_buf[19] = failing_lba & 0x000000ff;
2630 sense_buf[0] = 0x70;
2631 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2632 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2633 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2635 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2636 if (RES_IS_VSET(res->cfg_entry))
2638 le32_to_cpu(ioasa->u.
2639 vset.failing_lba_lo);
2640 sense_buf[0] |= 0x80;
2641 sense_buf[3] = (failing_lba >> 24) & 0xff;
2642 sense_buf[4] = (failing_lba >> 16) & 0xff;
2643 sense_buf[5] = (failing_lba >> 8) & 0xff;
2644 sense_buf[6] = failing_lba & 0xff;
2647 sense_buf[7] = 6; /* additional length */
2652 * pmcraid_error_handler - Error response handlers for a SCSI op
2653 * @cmd: pointer to pmcraid_cmd that has failed
2655 * This function determines whether or not to initiate ERP on the affected
2656 * device. This is called from a tasklet, which doesn't hold any locks.
2659 * 0 it caller can complete the request, otherwise 1 where in error
2660 * handler itself completes the request and returns the command block
2663 static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2665 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2666 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2667 struct pmcraid_instance *pinstance = cmd->drv_inst;
2668 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2669 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2670 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2671 u32 sense_copied = 0;
2674 pmcraid_info("resource pointer is NULL\n");
2678 /* If this was a SCSI read/write command keep count of errors */
2679 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2680 atomic_inc(&res->read_failures);
2681 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2682 atomic_inc(&res->write_failures);
2684 if (!RES_IS_GSCSI(res->cfg_entry) &&
2685 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2686 pmcraid_frame_auto_sense(cmd);
2689 /* Log IOASC/IOASA information based on user settings */
2690 pmcraid_ioasc_logger(ioasc, cmd);
2692 switch (masked_ioasc) {
2694 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2695 scsi_cmd->result |= (DID_ABORT << 16);
2698 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2699 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2700 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2703 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2705 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2708 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2709 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2712 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2713 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2714 if (!res->reset_progress)
2715 scsi_report_bus_reset(pinstance->host,
2716 scsi_cmd->device->channel);
2717 scsi_cmd->result |= (DID_ERROR << 16);
2720 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2721 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2724 /* if check_condition is not active return with error otherwise
2725 * get/frame the sense buffer
2727 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2728 SAM_STAT_CHECK_CONDITION &&
2729 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2732 /* If we have auto sense data as part of IOASA pass it to
2735 if (ioasa->auto_sense_length != 0) {
2736 short sense_len = ioasa->auto_sense_length;
2737 int data_size = min_t(u16, le16_to_cpu(sense_len),
2738 SCSI_SENSE_BUFFERSIZE);
2740 memcpy(scsi_cmd->sense_buffer,
2746 if (RES_IS_GSCSI(res->cfg_entry))
2747 pmcraid_cancel_all(cmd, sense_copied);
2748 else if (sense_copied)
2749 pmcraid_erp_done(cmd);
2751 pmcraid_request_sense(cmd);
2755 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2759 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2760 scsi_cmd->result |= (DID_ERROR << 16);
2767 * pmcraid_reset_device - device reset handler functions
2769 * @scsi_cmd: scsi command struct
2770 * @modifier: reset modifier indicating the reset sequence to be performed
2772 * This function issues a device reset to the affected device.
2773 * A LUN reset will be sent to the device first. If that does
2774 * not work, a target reset will be sent.
2779 static int pmcraid_reset_device(
2780 struct scsi_cmnd *scsi_cmd,
2781 unsigned long timeout,
2785 struct pmcraid_cmd *cmd;
2786 struct pmcraid_instance *pinstance;
2787 struct pmcraid_resource_entry *res;
2788 struct pmcraid_ioarcb *ioarcb;
2789 unsigned long lock_flags;
2793 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2794 res = scsi_cmd->device->hostdata;
2797 sdev_printk(KERN_ERR, scsi_cmd->device,
2798 "reset_device: NULL resource pointer\n");
2802 /* If adapter is currently going through reset/reload, return failed.
2803 * This will force the mid-layer to call _eh_bus/host reset, which
2804 * will then go to sleep and wait for the reset to complete
2806 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2807 if (pinstance->ioa_reset_in_progress ||
2808 pinstance->ioa_state == IOA_STATE_DEAD) {
2809 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2813 res->reset_progress = 1;
2814 pmcraid_info("Resetting %s resource with addr %x\n",
2815 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2816 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2817 le32_to_cpu(res->cfg_entry.resource_address));
2819 /* get a free cmd block */
2820 cmd = pmcraid_get_free_cmd(pinstance);
2823 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2824 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2828 ioarcb = &cmd->ioa_cb->ioarcb;
2829 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2830 ioarcb->request_type = REQ_TYPE_IOACMD;
2831 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2833 /* Initialize reset modifier bits */
2835 modifier = ENABLE_RESET_MODIFIER | modifier;
2837 ioarcb->cdb[1] = modifier;
2839 init_completion(&cmd->wait_for_completion);
2840 cmd->completion_req = 1;
2842 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2843 cmd->ioa_cb->ioarcb.cdb[0],
2844 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2845 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2847 pmcraid_send_cmd(cmd,
2848 pmcraid_internal_done,
2850 pmcraid_timeout_handler);
2852 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2854 /* RESET_DEVICE command completes after all pending IOARCBs are
2855 * completed. Once this command is completed, pmcraind_internal_done
2856 * will wake up the 'completion' queue.
2858 wait_for_completion(&cmd->wait_for_completion);
2860 /* complete the command here itself and return the command block
2863 pmcraid_return_cmd(cmd);
2864 res->reset_progress = 0;
2865 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2867 /* set the return value based on the returned ioasc */
2868 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2872 * _pmcraid_io_done - helper for pmcraid_io_done function
2874 * @cmd: pointer to pmcraid command struct
2875 * @reslen: residual data length to be set in the ioasa
2876 * @ioasc: ioasc either returned by IOA or set by driver itself.
2878 * This function is invoked by pmcraid_io_done to complete mid-layer
2882 * 0 if caller is required to return it to free_pool. Returns 1 if
2883 * caller need not worry about freeing command block as error handler
2884 * will take care of that.
2887 static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2889 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2892 scsi_set_resid(scsi_cmd, reslen);
2894 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2895 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2896 cmd->ioa_cb->ioarcb.cdb[0],
2897 ioasc, scsi_cmd->result);
2899 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2900 rc = pmcraid_error_handler(cmd);
2903 scsi_dma_unmap(scsi_cmd);
2904 scsi_cmd->scsi_done(scsi_cmd);
2911 * pmcraid_io_done - SCSI completion function
2913 * @cmd: pointer to pmcraid command struct
2915 * This function is invoked by tasklet/mid-layer error handler to completing
2916 * the SCSI ops sent from mid-layer.
2922 static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2924 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2925 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2927 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2928 pmcraid_return_cmd(cmd);
2932 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2934 * @cmd: command block of the command to be aborted
2937 * returns pointer to command structure used as cancelling cmd
2939 static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2941 struct pmcraid_cmd *cancel_cmd;
2942 struct pmcraid_instance *pinstance;
2943 struct pmcraid_resource_entry *res;
2945 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2946 res = cmd->scsi_cmd->device->hostdata;
2948 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2950 if (cancel_cmd == NULL) {
2951 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2955 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2957 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2958 cmd->ioa_cb->ioarcb.cdb[0],
2959 cmd->ioa_cb->ioarcb.response_handle >> 2);
2961 init_completion(&cancel_cmd->wait_for_completion);
2962 cancel_cmd->completion_req = 1;
2964 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2965 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
2966 cancel_cmd->ioa_cb->ioarcb.cdb[0],
2967 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2969 pmcraid_send_cmd(cancel_cmd,
2970 pmcraid_internal_done,
2971 PMCRAID_INTERNAL_TIMEOUT,
2972 pmcraid_timeout_handler);
2977 * pmcraid_abort_complete - Waits for ABORT TASK completion
2979 * @cancel_cmd: command block use as cancelling command
2982 * returns SUCCESS if ABORT TASK has good completion
2985 static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2987 struct pmcraid_resource_entry *res;
2990 wait_for_completion(&cancel_cmd->wait_for_completion);
2991 res = cancel_cmd->res;
2992 cancel_cmd->res = NULL;
2993 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2995 /* If the abort task is not timed out we will get a Good completion
2996 * as sense_key, otherwise we may get one the following responses
2997 * due to subsequent bus reset or device reset. In case IOASC is
2998 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
3000 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
3001 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
3002 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
3007 /* complete the command here itself */
3008 pmcraid_return_cmd(cancel_cmd);
3009 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
3013 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3015 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3016 * mid-layer ensures that no other commands are queued. This
3017 * never gets called under interrupt, but a separate eh thread.
3022 static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
3024 struct pmcraid_instance *pinstance;
3025 struct pmcraid_cmd *cmd;
3026 struct pmcraid_resource_entry *res;
3027 unsigned long host_lock_flags;
3028 unsigned long pending_lock_flags;
3029 struct pmcraid_cmd *cancel_cmd = NULL;
3034 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3036 scmd_printk(KERN_INFO, scsi_cmd,
3037 "I/O command timed out, aborting it.\n");
3039 res = scsi_cmd->device->hostdata;
3044 /* If we are currently going through reset/reload, return failed.
3045 * This will force the mid-layer to eventually call
3046 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3049 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
3051 if (pinstance->ioa_reset_in_progress ||
3052 pinstance->ioa_state == IOA_STATE_DEAD) {
3053 spin_unlock_irqrestore(pinstance->host->host_lock,
3058 /* loop over pending cmd list to find cmd corresponding to this
3059 * scsi_cmd. Note that this command might not have been completed
3060 * already. locking: all pending commands are protected with
3061 * pending_pool_lock.
3063 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
3064 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
3066 if (cmd->scsi_cmd == scsi_cmd) {
3072 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3073 pending_lock_flags);
3075 /* If the command to be aborted was given to IOA and still pending with
3076 * it, send ABORT_TASK to abort this and wait for its completion
3079 cancel_cmd = pmcraid_abort_cmd(cmd);
3081 spin_unlock_irqrestore(pinstance->host->host_lock,
3085 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
3086 rc = pmcraid_abort_complete(cancel_cmd);
3089 return cmd_found ? rc : SUCCESS;
3093 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3095 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3097 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3098 * Since these are called from mid-layer EH thread, no other IO will be queued
3099 * to the resource being reset. However, control path (IOCTL) may be active so
3100 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3101 * takes care by locking/unlocking host_lock.
3106 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3108 scmd_printk(KERN_INFO, scmd,
3109 "resetting device due to an I/O command timeout.\n");
3110 return pmcraid_reset_device(scmd,
3111 PMCRAID_INTERNAL_TIMEOUT,
3115 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3117 scmd_printk(KERN_INFO, scmd,
3118 "Doing bus reset due to an I/O command timeout.\n");
3119 return pmcraid_reset_device(scmd,
3120 PMCRAID_RESET_BUS_TIMEOUT,
3124 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3126 scmd_printk(KERN_INFO, scmd,
3127 "Doing target reset due to an I/O command timeout.\n");
3128 return pmcraid_reset_device(scmd,
3129 PMCRAID_INTERNAL_TIMEOUT,
3130 RESET_DEVICE_TARGET);
3134 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3136 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3138 * Initiates adapter reset to bring it up to operational state
3143 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3145 unsigned long interval = 10000; /* 10 seconds interval */
3146 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3147 struct pmcraid_instance *pinstance =
3148 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3151 /* wait for an additional 150 seconds just in case firmware could come
3152 * up and if it could complete all the pending commands excluding the
3153 * two HCAM (CCN and LDN).
3156 if (atomic_read(&pinstance->outstanding_cmds) <=
3157 PMCRAID_MAX_HCAM_CMD)
3162 dev_err(&pinstance->pdev->dev,
3163 "Adapter being reset due to an I/O command timeout.\n");
3164 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3168 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3169 * @scsi_cmd: scsi command struct
3172 * number of tags or 0 if the task is not tagged
3174 static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
3179 if (scsi_populate_tag_msg(scsi_cmd, tag)) {
3181 case MSG_SIMPLE_TAG:
3182 rc = TASK_TAG_SIMPLE;
3185 rc = TASK_TAG_QUEUE_HEAD;
3187 case MSG_ORDERED_TAG:
3188 rc = TASK_TAG_ORDERED;
3198 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3199 * @cmd: pmcraid command struct
3200 * @sgcount: count of scatter-gather elements
3203 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3204 * or external IOADLs
3206 struct pmcraid_ioadl_desc *
3207 pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3209 struct pmcraid_ioadl_desc *ioadl;
3210 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3211 int ioadl_count = 0;
3213 if (ioarcb->add_cmd_param_length)
3214 ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
3215 ioarcb->ioadl_length =
3216 sizeof(struct pmcraid_ioadl_desc) * sgcount;
3218 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3219 /* external ioadls start at offset 0x80 from control_block
3220 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3221 * It is necessary to indicate to firmware that driver is
3222 * using ioadls to be treated as external to IOARCB.
3224 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
3225 ioarcb->ioadl_bus_addr =
3226 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3227 offsetof(struct pmcraid_ioarcb,
3228 add_data.u.ioadl[3]));
3229 ioadl = &ioarcb->add_data.u.ioadl[3];
3231 ioarcb->ioadl_bus_addr =
3232 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3233 offsetof(struct pmcraid_ioarcb,
3234 add_data.u.ioadl[ioadl_count]));
3236 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3237 ioarcb->ioarcb_bus_addr |=
3238 DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
3245 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3246 * @pinstance: pointer to adapter instance structure
3247 * @cmd: pmcraid command struct
3249 * This function is invoked by queuecommand entry point while sending a command
3250 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3253 * 0 on success or -1 on failure
3255 static int pmcraid_build_ioadl(
3256 struct pmcraid_instance *pinstance,
3257 struct pmcraid_cmd *cmd
3261 struct scatterlist *sglist;
3263 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3264 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3265 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
3267 u32 length = scsi_bufflen(scsi_cmd);
3272 nseg = scsi_dma_map(scsi_cmd);
3275 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
3277 } else if (nseg > PMCRAID_MAX_IOADLS) {
3278 scsi_dma_unmap(scsi_cmd);
3279 scmd_printk(KERN_ERR, scsi_cmd,
3280 "sg count is (%d) more than allowed!\n", nseg);
3284 /* Initialize IOARCB data transfer length fields */
3285 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3286 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3288 ioarcb->request_flags0 |= NO_LINK_DESCS;
3289 ioarcb->data_transfer_length = cpu_to_le32(length);
3290 ioadl = pmcraid_init_ioadls(cmd, nseg);
3292 /* Initialize IOADL descriptor addresses */
3293 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3294 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3295 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3298 /* setup last descriptor */
3299 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3305 * pmcraid_free_sglist - Frees an allocated SG buffer list
3306 * @sglist: scatter/gather list pointer
3308 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3313 static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3317 for (i = 0; i < sglist->num_sg; i++)
3318 __free_pages(sg_page(&(sglist->scatterlist[i])),
3325 * pmcraid_alloc_sglist - Allocates memory for a SG list
3326 * @buflen: buffer length
3328 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3332 * pointer to sglist / NULL on failure
3334 static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3336 struct pmcraid_sglist *sglist;
3337 struct scatterlist *scatterlist;
3344 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3345 order = (sg_size > 0) ? get_order(sg_size) : 0;
3346 bsize_elem = PAGE_SIZE * (1 << order);
3348 /* Determine the actual number of sg entries needed */
3349 if (buflen % bsize_elem)
3350 num_elem = (buflen / bsize_elem) + 1;
3352 num_elem = buflen / bsize_elem;
3354 /* Allocate a scatter/gather list for the DMA */
3355 sglist = kzalloc(sizeof(struct pmcraid_sglist) +
3356 (sizeof(struct scatterlist) * (num_elem - 1)),
3362 scatterlist = sglist->scatterlist;
3363 sg_init_table(scatterlist, num_elem);
3364 sglist->order = order;
3365 sglist->num_sg = num_elem;
3368 for (i = 0; i < num_elem; i++) {
3369 page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
3371 for (j = i - 1; j >= 0; j--)
3372 __free_pages(sg_page(&scatterlist[j]), order);
3377 sg_set_page(&scatterlist[i], page,
3378 sg_size < bsize_elem ? sg_size : bsize_elem, 0);
3379 sg_size -= bsize_elem;
3386 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3387 * @sglist: scatter/gather list pointer
3388 * @buffer: buffer pointer
3389 * @len: buffer length
3390 * @direction: data transfer direction
3392 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3395 * 0 on success / other on failure
3397 static int pmcraid_copy_sglist(
3398 struct pmcraid_sglist *sglist,
3399 unsigned long buffer,
3404 struct scatterlist *scatterlist;
3410 /* Determine the actual number of bytes per element */
3411 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3413 scatterlist = sglist->scatterlist;
3415 for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3416 struct page *page = sg_page(&scatterlist[i]);
3419 if (direction == DMA_TO_DEVICE)
3420 rc = __copy_from_user(kaddr,
3424 rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
3429 pmcraid_err("failed to copy user data into sg list\n");
3433 scatterlist[i].length = bsize_elem;
3436 if (len % bsize_elem) {
3437 struct page *page = sg_page(&scatterlist[i]);
3441 if (direction == DMA_TO_DEVICE)
3442 rc = __copy_from_user(kaddr,
3446 rc = __copy_to_user((void *)buffer,
3452 scatterlist[i].length = len % bsize_elem;
3456 pmcraid_err("failed to copy user data into sg list\n");
3464 * pmcraid_queuecommand - Queue a mid-layer request
3465 * @scsi_cmd: scsi command struct
3466 * @done: done function
3468 * This function queues a request generated by the mid-layer. Midlayer calls
3469 * this routine within host->lock. Some of the functions called by queuecommand
3470 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3474 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3475 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3477 static int pmcraid_queuecommand_lck(
3478 struct scsi_cmnd *scsi_cmd,
3479 void (*done) (struct scsi_cmnd *)
3482 struct pmcraid_instance *pinstance;
3483 struct pmcraid_resource_entry *res;
3484 struct pmcraid_ioarcb *ioarcb;
3485 struct pmcraid_cmd *cmd;
3490 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3491 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3492 scsi_cmd->scsi_done = done;
3493 res = scsi_cmd->device->hostdata;
3494 scsi_cmd->result = (DID_OK << 16);
3496 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3499 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3500 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3501 scsi_cmd->result = (DID_NO_CONNECT << 16);
3502 scsi_cmd->scsi_done(scsi_cmd);
3506 /* If IOA reset is in progress, can't queue the commands */
3507 if (pinstance->ioa_reset_in_progress)
3508 return SCSI_MLQUEUE_HOST_BUSY;
3510 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3511 * the command here itself with success return
3513 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3514 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3515 scsi_cmd->scsi_done(scsi_cmd);
3519 /* initialize the command and IOARCB to be sent to IOA */
3520 cmd = pmcraid_get_free_cmd(pinstance);
3523 pmcraid_err("free command block is not available\n");
3524 return SCSI_MLQUEUE_HOST_BUSY;
3527 cmd->scsi_cmd = scsi_cmd;
3528 ioarcb = &(cmd->ioa_cb->ioarcb);
3529 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3530 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3531 ioarcb->request_type = REQ_TYPE_SCSI;
3533 /* set hrrq number where the IOA should respond to. Note that all cmds
3534 * generated internally uses hrrq_id 0, exception to this is the cmd
3535 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3536 * hrrq_id assigned here in queuecommand
3538 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3539 pinstance->num_hrrq;
3540 cmd->cmd_done = pmcraid_io_done;
3542 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3543 if (scsi_cmd->underflow == 0)
3544 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3546 if (res->sync_reqd) {
3547 ioarcb->request_flags0 |= SYNC_COMPLETE;
3551 ioarcb->request_flags0 |= NO_LINK_DESCS;
3552 ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
3554 if (RES_IS_GSCSI(res->cfg_entry))
3555 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3558 rc = pmcraid_build_ioadl(pinstance, cmd);
3560 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3561 le32_to_cpu(ioarcb->response_handle) >> 2,
3562 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3563 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3564 PMCRAID_PHYS_BUS_ID,
3565 RES_IS_VSET(res->cfg_entry) ?
3566 (fw_version <= PMCRAID_FW_VERSION_1 ?
3567 res->cfg_entry.unique_flags1 :
3568 res->cfg_entry.array_id & 0xFF) :
3569 RES_TARGET(res->cfg_entry.resource_address),
3570 RES_LUN(res->cfg_entry.resource_address));
3572 if (likely(rc == 0)) {
3573 _pmcraid_fire_command(cmd);
3575 pmcraid_err("queuecommand could not build ioadl\n");
3576 pmcraid_return_cmd(cmd);
3577 rc = SCSI_MLQUEUE_HOST_BUSY;
3583 static DEF_SCSI_QCMD(pmcraid_queuecommand)
3586 * pmcraid_open -char node "open" entry, allowed only users with admin access
3588 static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3590 struct pmcraid_instance *pinstance;
3592 if (!capable(CAP_SYS_ADMIN))
3595 /* Populate adapter instance * pointer for use by ioctl */
3596 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3597 filep->private_data = pinstance;
3603 * pmcraid_release - char node "release" entry point
3605 static int pmcraid_chr_release(struct inode *inode, struct file *filep)
3607 struct pmcraid_instance *pinstance = filep->private_data;
3609 filep->private_data = NULL;
3610 fasync_helper(-1, filep, 0, &pinstance->aen_queue);
3616 * pmcraid_fasync - Async notifier registration from applications
3618 * This function adds the calling process to a driver global queue. When an
3619 * event occurs, SIGIO will be sent to all processes in this queue.
3621 static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3623 struct pmcraid_instance *pinstance;
3626 pinstance = filep->private_data;
3627 mutex_lock(&pinstance->aen_queue_lock);
3628 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3629 mutex_unlock(&pinstance->aen_queue_lock);
3636 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3637 * commands sent over IOCTL interface
3639 * @cmd : pointer to struct pmcraid_cmd
3640 * @buflen : length of the request buffer
3641 * @direction : data transfer direction
3644 * 0 on success, non-zero error code on failure
3646 static int pmcraid_build_passthrough_ioadls(
3647 struct pmcraid_cmd *cmd,
3652 struct pmcraid_sglist *sglist = NULL;
3653 struct scatterlist *sg = NULL;
3654 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3655 struct pmcraid_ioadl_desc *ioadl;
3658 sglist = pmcraid_alloc_sglist(buflen);
3661 pmcraid_err("can't allocate memory for passthrough SGls\n");
3665 sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
3666 sglist->scatterlist,
3667 sglist->num_sg, direction);
3669 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3670 dev_err(&cmd->drv_inst->pdev->dev,
3671 "Failed to map passthrough buffer!\n");
3672 pmcraid_free_sglist(sglist);
3676 cmd->sglist = sglist;
3677 ioarcb->request_flags0 |= NO_LINK_DESCS;
3679 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3681 /* Initialize IOADL descriptor addresses */
3682 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3683 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3684 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3688 /* setup the last descriptor */
3689 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3696 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3698 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3699 * @buflen: size of the request buffer
3700 * @direction: data transfer direction
3703 * 0 on success, non-zero error code on failure
3705 static void pmcraid_release_passthrough_ioadls(
3706 struct pmcraid_cmd *cmd,
3711 struct pmcraid_sglist *sglist = cmd->sglist;
3714 pci_unmap_sg(cmd->drv_inst->pdev,
3715 sglist->scatterlist,
3718 pmcraid_free_sglist(sglist);
3724 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3726 * @pinstance: pointer to adapter instance structure
3728 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3731 * 0 on success, non-zero error code on failure
3733 static long pmcraid_ioctl_passthrough(
3734 struct pmcraid_instance *pinstance,
3735 unsigned int ioctl_cmd,
3736 unsigned int buflen,
3740 struct pmcraid_passthrough_ioctl_buffer *buffer;
3741 struct pmcraid_ioarcb *ioarcb;
3742 struct pmcraid_cmd *cmd;
3743 struct pmcraid_cmd *cancel_cmd;
3744 unsigned long request_buffer;
3745 unsigned long request_offset;
3746 unsigned long lock_flags;
3751 u8 access, direction;
3754 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3755 if (pinstance->ioa_reset_in_progress) {
3756 rc = wait_event_interruptible_timeout(
3757 pinstance->reset_wait_q,
3758 !pinstance->ioa_reset_in_progress,
3759 msecs_to_jiffies(10000));
3764 return -ERESTARTSYS;
3767 /* If adapter is not in operational state, return error */
3768 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3769 pmcraid_err("IOA is not operational\n");
3773 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3774 buffer = kmalloc(buffer_size, GFP_KERNEL);
3777 pmcraid_err("no memory for passthrough buffer\n");
3782 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3784 request_buffer = arg + request_offset;
3786 rc = __copy_from_user(buffer,
3787 (struct pmcraid_passthrough_ioctl_buffer *) arg,
3788 sizeof(struct pmcraid_passthrough_ioctl_buffer));
3792 offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
3795 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3797 goto out_free_buffer;
3800 request_size = buffer->ioarcb.data_transfer_length;
3802 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3803 access = VERIFY_READ;
3804 direction = DMA_TO_DEVICE;
3806 access = VERIFY_WRITE;
3807 direction = DMA_FROM_DEVICE;
3810 if (request_size > 0) {
3811 rc = access_ok(access, arg, request_offset + request_size);
3815 goto out_free_buffer;
3817 } else if (request_size < 0) {
3819 goto out_free_buffer;
3822 /* check if we have any additional command parameters */
3823 if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
3825 goto out_free_buffer;
3828 cmd = pmcraid_get_free_cmd(pinstance);
3831 pmcraid_err("free command block is not available\n");
3833 goto out_free_buffer;
3836 cmd->scsi_cmd = NULL;
3837 ioarcb = &(cmd->ioa_cb->ioarcb);
3839 /* Copy the user-provided IOARCB stuff field by field */
3840 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3841 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3842 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3843 ioarcb->request_type = buffer->ioarcb.request_type;
3844 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3845 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3846 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3848 if (buffer->ioarcb.add_cmd_param_length) {
3849 ioarcb->add_cmd_param_length =
3850 buffer->ioarcb.add_cmd_param_length;
3851 ioarcb->add_cmd_param_offset =
3852 buffer->ioarcb.add_cmd_param_offset;
3853 memcpy(ioarcb->add_data.u.add_cmd_params,
3854 buffer->ioarcb.add_data.u.add_cmd_params,
3855 buffer->ioarcb.add_cmd_param_length);
3858 /* set hrrq number where the IOA should respond to. Note that all cmds
3859 * generated internally uses hrrq_id 0, exception to this is the cmd
3860 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3861 * hrrq_id assigned here in queuecommand
3863 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3864 pinstance->num_hrrq;
3867 rc = pmcraid_build_passthrough_ioadls(cmd,
3871 pmcraid_err("couldn't build passthrough ioadls\n");
3872 goto out_free_buffer;
3874 } else if (request_size < 0) {
3876 goto out_free_buffer;
3879 /* If data is being written into the device, copy the data from user
3882 if (direction == DMA_TO_DEVICE && request_size > 0) {
3883 rc = pmcraid_copy_sglist(cmd->sglist,
3888 pmcraid_err("failed to copy user buffer\n");
3889 goto out_free_sglist;
3893 /* passthrough ioctl is a blocking command so, put the user to sleep
3894 * until timeout. Note that a timeout value of 0 means, do timeout.
3896 cmd->cmd_done = pmcraid_internal_done;
3897 init_completion(&cmd->wait_for_completion);
3898 cmd->completion_req = 1;
3900 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3901 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3902 cmd->ioa_cb->ioarcb.cdb[0],
3903 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3905 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3906 _pmcraid_fire_command(cmd);
3907 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3909 /* NOTE ! Remove the below line once abort_task is implemented
3910 * in firmware. This line disables ioctl command timeout handling logic
3911 * similar to IO command timeout handling, making ioctl commands to wait
3912 * until the command completion regardless of timeout value specified in
3915 buffer->ioarcb.cmd_timeout = 0;
3917 /* If command timeout is specified put caller to wait till that time,
3918 * otherwise it would be blocking wait. If command gets timed out, it
3921 if (buffer->ioarcb.cmd_timeout == 0) {
3922 wait_for_completion(&cmd->wait_for_completion);
3923 } else if (!wait_for_completion_timeout(
3924 &cmd->wait_for_completion,
3925 msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
3927 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3928 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
3929 cmd->ioa_cb->ioarcb.cdb[0]);
3931 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3932 cancel_cmd = pmcraid_abort_cmd(cmd);
3933 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3936 wait_for_completion(&cancel_cmd->wait_for_completion);
3937 ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
3938 pmcraid_return_cmd(cancel_cmd);
3940 /* if abort task couldn't find the command i.e it got
3941 * completed prior to aborting, return good completion.
3942 * if command got aborted successfully or there was IOA
3943 * reset due to abort task itself getting timedout then
3946 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3947 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3948 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3950 goto out_handle_response;
3954 /* no command block for abort task or abort task failed to abort
3955 * the IOARCB, then wait for 150 more seconds and initiate reset
3956 * sequence after timeout
3958 if (!wait_for_completion_timeout(
3959 &cmd->wait_for_completion,
3960 msecs_to_jiffies(150 * 1000))) {
3961 pmcraid_reset_bringup(cmd->drv_inst);
3966 out_handle_response:
3967 /* copy entire IOASA buffer and return IOCTL success.
3968 * If copying IOASA to user-buffer fails, return
3971 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3972 sizeof(struct pmcraid_ioasa))) {
3973 pmcraid_err("failed to copy ioasa buffer to user\n");
3977 /* If the data transfer was from device, copy the data onto user
3980 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3981 rc = pmcraid_copy_sglist(cmd->sglist,
3986 pmcraid_err("failed to copy user buffer\n");
3992 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3993 pmcraid_return_cmd(cmd);
4005 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
4007 * @pinstance: pointer to adapter instance structure
4008 * @cmd: ioctl command passed in
4009 * @buflen: length of user_buffer
4010 * @user_buffer: user buffer pointer
4013 * 0 in case of success, otherwise appropriate error code
4015 static long pmcraid_ioctl_driver(
4016 struct pmcraid_instance *pinstance,
4018 unsigned int buflen,
4019 void __user *user_buffer
4024 if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
4025 pmcraid_err("ioctl_driver: access fault in request buffer\n");
4030 case PMCRAID_IOCTL_RESET_ADAPTER:
4031 pmcraid_reset_bringup(pinstance);
4043 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4045 * @cmd: ioctl command
4047 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4050 * negetive error code if there are access issues, otherwise zero.
4051 * Upon success, returns ioctl header copied out of user buffer.
4054 static int pmcraid_check_ioctl_buffer(
4057 struct pmcraid_ioctl_header *hdr
4061 int access = VERIFY_READ;
4063 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
4064 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4068 /* check for valid driver signature */
4069 rc = memcmp(hdr->signature,
4070 PMCRAID_IOCTL_SIGNATURE,
4071 sizeof(hdr->signature));
4073 pmcraid_err("signature verification failed\n");
4077 /* check for appropriate buffer access */
4078 if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
4079 access = VERIFY_WRITE;
4081 rc = access_ok(access,
4082 (arg + sizeof(struct pmcraid_ioctl_header)),
4083 hdr->buffer_length);
4085 pmcraid_err("access failed for user buffer of size %d\n",
4086 hdr->buffer_length);
4094 * pmcraid_ioctl - char node ioctl entry point
4096 static long pmcraid_chr_ioctl(
4102 struct pmcraid_instance *pinstance = NULL;
4103 struct pmcraid_ioctl_header *hdr = NULL;
4104 int retval = -ENOTTY;
4106 hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header));
4109 pmcraid_err("faile to allocate memory for ioctl header\n");
4113 retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
4116 pmcraid_info("chr_ioctl: header check failed\n");
4121 pinstance = filep->private_data;
4124 pmcraid_info("adapter instance is not found\n");
4129 switch (_IOC_TYPE(cmd)) {
4131 case PMCRAID_PASSTHROUGH_IOCTL:
4132 /* If ioctl code is to download microcode, we need to block
4133 * mid-layer requests.
4135 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4136 scsi_block_requests(pinstance->host);
4138 retval = pmcraid_ioctl_passthrough(pinstance,
4143 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4144 scsi_unblock_requests(pinstance->host);
4147 case PMCRAID_DRIVER_IOCTL:
4148 arg += sizeof(struct pmcraid_ioctl_header);
4149 retval = pmcraid_ioctl_driver(pinstance,
4152 (void __user *)arg);
4166 * File operations structure for management interface
4168 static const struct file_operations pmcraid_fops = {
4169 .owner = THIS_MODULE,
4170 .open = pmcraid_chr_open,
4171 .release = pmcraid_chr_release,
4172 .fasync = pmcraid_chr_fasync,
4173 .unlocked_ioctl = pmcraid_chr_ioctl,
4174 #ifdef CONFIG_COMPAT
4175 .compat_ioctl = pmcraid_chr_ioctl,
4177 .llseek = noop_llseek,
4184 * pmcraid_show_log_level - Display adapter's error logging level
4185 * @dev: class device struct
4189 * number of bytes printed to buffer
4191 static ssize_t pmcraid_show_log_level(
4193 struct device_attribute *attr,
4196 struct Scsi_Host *shost = class_to_shost(dev);
4197 struct pmcraid_instance *pinstance =
4198 (struct pmcraid_instance *)shost->hostdata;
4199 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
4203 * pmcraid_store_log_level - Change the adapter's error logging level
4204 * @dev: class device struct
4209 * number of bytes printed to buffer
4211 static ssize_t pmcraid_store_log_level(
4213 struct device_attribute *attr,
4218 struct Scsi_Host *shost;
4219 struct pmcraid_instance *pinstance;
4222 if (strict_strtoul(buf, 10, &val))
4224 /* log-level should be from 0 to 2 */
4228 shost = class_to_shost(dev);
4229 pinstance = (struct pmcraid_instance *)shost->hostdata;
4230 pinstance->current_log_level = val;
4235 static struct device_attribute pmcraid_log_level_attr = {
4237 .name = "log_level",
4238 .mode = S_IRUGO | S_IWUSR,
4240 .show = pmcraid_show_log_level,
4241 .store = pmcraid_store_log_level,
4245 * pmcraid_show_drv_version - Display driver version
4246 * @dev: class device struct
4250 * number of bytes printed to buffer
4252 static ssize_t pmcraid_show_drv_version(
4254 struct device_attribute *attr,
4258 return snprintf(buf, PAGE_SIZE, "version: %s\n",
4259 PMCRAID_DRIVER_VERSION);
4262 static struct device_attribute pmcraid_driver_version_attr = {
4264 .name = "drv_version",
4267 .show = pmcraid_show_drv_version,
4271 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4272 * @dev: class device struct
4276 * number of bytes printed to buffer
4278 static ssize_t pmcraid_show_adapter_id(
4280 struct device_attribute *attr,
4284 struct Scsi_Host *shost = class_to_shost(dev);
4285 struct pmcraid_instance *pinstance =
4286 (struct pmcraid_instance *)shost->hostdata;
4287 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4288 pinstance->pdev->devfn;
4289 u32 aen_group = pmcraid_event_family.id;
4291 return snprintf(buf, PAGE_SIZE,
4292 "adapter id: %d\nminor: %d\naen group: %d\n",
4293 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4296 static struct device_attribute pmcraid_adapter_id_attr = {
4298 .name = "adapter_id",
4299 .mode = S_IRUGO | S_IWUSR,
4301 .show = pmcraid_show_adapter_id,
4304 static struct device_attribute *pmcraid_host_attrs[] = {
4305 &pmcraid_log_level_attr,
4306 &pmcraid_driver_version_attr,
4307 &pmcraid_adapter_id_attr,
4312 /* host template structure for pmcraid driver */
4313 static struct scsi_host_template pmcraid_host_template = {
4314 .module = THIS_MODULE,
4315 .name = PMCRAID_DRIVER_NAME,
4316 .queuecommand = pmcraid_queuecommand,
4317 .eh_abort_handler = pmcraid_eh_abort_handler,
4318 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4319 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4320 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4321 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4323 .slave_alloc = pmcraid_slave_alloc,
4324 .slave_configure = pmcraid_slave_configure,
4325 .slave_destroy = pmcraid_slave_destroy,
4326 .change_queue_depth = pmcraid_change_queue_depth,
4327 .change_queue_type = pmcraid_change_queue_type,
4328 .can_queue = PMCRAID_MAX_IO_CMD,
4330 .sg_tablesize = PMCRAID_MAX_IOADLS,
4331 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4332 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4333 .use_clustering = ENABLE_CLUSTERING,
4334 .shost_attrs = pmcraid_host_attrs,
4335 .proc_name = PMCRAID_DRIVER_NAME
4339 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4340 * @irq: interrupt vector number
4341 * @dev_id: pointer hrrq_vector
4344 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4347 static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
4349 struct pmcraid_isr_param *hrrq_vector;
4350 struct pmcraid_instance *pinstance;
4351 unsigned long lock_flags;
4355 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4356 hrrq_id = hrrq_vector->hrrq_id;
4357 pinstance = hrrq_vector->drv_inst;
4360 /* Read the interrupt */
4361 intrs_val = pmcraid_read_interrupts(pinstance);
4363 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4364 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4365 /* Any error interrupts including unit_check,
4366 * initiate IOA reset.In case of unit check indicate
4367 * to reset_sequence that IOA unit checked and prepare
4368 * for a dump during reset sequence
4370 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4371 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4372 pinstance->ioa_unit_check = 1;
4374 pmcraid_err("ISR: error interrupts: %x \
4375 initiating reset\n", intrs_val);
4376 spin_lock_irqsave(pinstance->host->host_lock,
4378 pmcraid_initiate_reset(pinstance);
4379 spin_unlock_irqrestore(
4380 pinstance->host->host_lock,
4383 /* If interrupt was as part of the ioa initialization,
4384 * clear it. Delete the timer and wakeup the
4385 * reset engine to proceed with reset sequence
4387 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4388 pmcraid_clr_trans_op(pinstance);
4390 /* Clear the interrupt register by writing
4391 * to host to ioa doorbell. Once done
4392 * FW will clear the interrupt.
4394 iowrite32(DOORBELL_INTR_MSIX_CLR,
4395 pinstance->int_regs.host_ioa_interrupt_reg);
4396 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4402 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4408 * pmcraid_isr - implements legacy interrupt handling routine
4410 * @irq: interrupt vector number
4411 * @dev_id: pointer hrrq_vector
4414 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4416 static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4418 struct pmcraid_isr_param *hrrq_vector;
4419 struct pmcraid_instance *pinstance;
4421 unsigned long lock_flags;
4424 /* In case of legacy interrupt mode where interrupts are shared across
4425 * isrs, it may be possible that the current interrupt is not from IOA
4428 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4431 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4432 pinstance = hrrq_vector->drv_inst;
4434 intrs = pmcraid_read_interrupts(pinstance);
4436 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
4439 /* Any error interrupts including unit_check, initiate IOA reset.
4440 * In case of unit check indicate to reset_sequence that IOA unit
4441 * checked and prepare for a dump during reset sequence
4443 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4445 if (intrs & INTRS_IOA_UNIT_CHECK)
4446 pinstance->ioa_unit_check = 1;
4449 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4450 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4453 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4454 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
4455 pmcraid_initiate_reset(pinstance);
4456 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
4458 /* If interrupt was as part of the ioa initialization,
4459 * clear. Delete the timer and wakeup the
4460 * reset engine to proceed with reset sequence
4462 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4463 pmcraid_clr_trans_op(pinstance);
4466 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4468 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4471 &(pinstance->isr_tasklet[hrrq_id]));
4480 * pmcraid_worker_function - worker thread function
4482 * @workp: pointer to struct work queue
4488 static void pmcraid_worker_function(struct work_struct *workp)
4490 struct pmcraid_instance *pinstance;
4491 struct pmcraid_resource_entry *res;
4492 struct pmcraid_resource_entry *temp;
4493 struct scsi_device *sdev;
4494 unsigned long lock_flags;
4495 unsigned long host_lock_flags;
4497 u8 bus, target, lun;
4499 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4500 /* add resources only after host is added into system */
4501 if (!atomic_read(&pinstance->expose_resources))
4504 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4506 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4507 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4509 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4510 sdev = res->scsi_dev;
4512 /* host_lock must be held before calling
4515 spin_lock_irqsave(pinstance->host->host_lock,
4517 if (!scsi_device_get(sdev)) {
4518 spin_unlock_irqrestore(
4519 pinstance->host->host_lock,
4521 pmcraid_info("deleting %x from midlayer\n",
4522 res->cfg_entry.resource_address);
4523 list_move_tail(&res->queue,
4524 &pinstance->free_res_q);
4525 spin_unlock_irqrestore(
4526 &pinstance->resource_lock,
4528 scsi_remove_device(sdev);
4529 scsi_device_put(sdev);
4530 spin_lock_irqsave(&pinstance->resource_lock,
4532 res->change_detected = 0;
4534 spin_unlock_irqrestore(
4535 pinstance->host->host_lock,
4541 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4543 if (res->change_detected == RES_CHANGE_ADD) {
4545 if (!pmcraid_expose_resource(fw_version,
4549 if (RES_IS_VSET(res->cfg_entry)) {
4550 bus = PMCRAID_VSET_BUS_ID;
4551 if (fw_version <= PMCRAID_FW_VERSION_1)
4552 target = res->cfg_entry.unique_flags1;
4554 target = res->cfg_entry.array_id & 0xFF;
4555 lun = PMCRAID_VSET_LUN_ID;
4557 bus = PMCRAID_PHYS_BUS_ID;
4560 res->cfg_entry.resource_address);
4561 lun = RES_LUN(res->cfg_entry.resource_address);
4564 res->change_detected = 0;
4565 spin_unlock_irqrestore(&pinstance->resource_lock,
4567 scsi_add_device(pinstance->host, bus, target, lun);
4568 spin_lock_irqsave(&pinstance->resource_lock,
4573 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4577 * pmcraid_tasklet_function - Tasklet function
4579 * @instance: pointer to msix param structure
4584 static void pmcraid_tasklet_function(unsigned long instance)
4586 struct pmcraid_isr_param *hrrq_vector;
4587 struct pmcraid_instance *pinstance;
4588 unsigned long hrrq_lock_flags;
4589 unsigned long pending_lock_flags;
4590 unsigned long host_lock_flags;
4591 spinlock_t *lockp; /* hrrq buffer lock */
4595 hrrq_vector = (struct pmcraid_isr_param *)instance;
4596 pinstance = hrrq_vector->drv_inst;
4597 id = hrrq_vector->hrrq_id;
4598 lockp = &(pinstance->hrrq_lock[id]);
4600 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4601 * protected by its own lock. Traversals must be done within this lock
4602 * as there may be multiple tasklets running on multiple CPUs. Note
4603 * that the lock is held just for picking up the response handle and
4604 * manipulating hrrq_curr/toggle_bit values.
4606 spin_lock_irqsave(lockp, hrrq_lock_flags);
4608 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4610 while ((resp & HRRQ_TOGGLE_BIT) ==
4611 pinstance->host_toggle_bit[id]) {
4613 int cmd_index = resp >> 2;
4614 struct pmcraid_cmd *cmd = NULL;
4616 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4617 pinstance->hrrq_curr[id]++;
4619 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4620 pinstance->host_toggle_bit[id] ^= 1u;
4623 if (cmd_index >= PMCRAID_MAX_CMD) {
4624 /* In case of invalid response handle, log message */
4625 pmcraid_err("Invalid response handle %d\n", cmd_index);
4626 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4630 cmd = pinstance->cmd_list[cmd_index];
4631 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4633 spin_lock_irqsave(&pinstance->pending_pool_lock,
4634 pending_lock_flags);
4635 list_del(&cmd->free_list);
4636 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4637 pending_lock_flags);
4638 del_timer(&cmd->timer);
4639 atomic_dec(&pinstance->outstanding_cmds);
4641 if (cmd->cmd_done == pmcraid_ioa_reset) {
4642 spin_lock_irqsave(pinstance->host->host_lock,
4645 spin_unlock_irqrestore(pinstance->host->host_lock,
4647 } else if (cmd->cmd_done != NULL) {
4650 /* loop over until we are done with all responses */
4651 spin_lock_irqsave(lockp, hrrq_lock_flags);
4652 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4655 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4659 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4660 * @pinstance: pointer to adapter instance structure
4662 * This routine un-registers registered interrupt handler and
4663 * also frees irqs/vectors.
4669 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4673 for (i = 0; i < pinstance->num_hrrq; i++)
4674 free_irq(pinstance->hrrq_vector[i].vector,
4675 &(pinstance->hrrq_vector[i]));
4677 if (pinstance->interrupt_mode) {
4678 pci_disable_msix(pinstance->pdev);
4679 pinstance->interrupt_mode = 0;
4684 * pmcraid_register_interrupt_handler - registers interrupt handler
4685 * @pinstance: pointer to per-adapter instance structure
4688 * 0 on success, non-zero error code otherwise.
4691 pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4694 struct pci_dev *pdev = pinstance->pdev;
4696 if ((pmcraid_enable_msix) &&
4697 (pci_find_capability(pdev, PCI_CAP_ID_MSIX))) {
4698 int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
4699 struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
4701 for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
4702 entries[i].entry = i;
4704 rc = pci_enable_msix(pdev, entries, num_hrrq);
4706 goto pmcraid_isr_legacy;
4708 /* Check how many MSIX vectors are allocated and register
4709 * msi-x handlers for each of them giving appropriate buffer
4713 if (pci_enable_msix(pdev, entries, num_hrrq))
4714 goto pmcraid_isr_legacy;
4717 for (i = 0; i < num_hrrq; i++) {
4718 pinstance->hrrq_vector[i].hrrq_id = i;
4719 pinstance->hrrq_vector[i].drv_inst = pinstance;
4720 pinstance->hrrq_vector[i].vector = entries[i].vector;
4721 rc = request_irq(pinstance->hrrq_vector[i].vector,
4722 pmcraid_isr_msix, 0,
4723 PMCRAID_DRIVER_NAME,
4724 &(pinstance->hrrq_vector[i]));
4728 for (j = 0; j < i; j++)
4729 free_irq(entries[j].vector,
4730 &(pinstance->hrrq_vector[j]));
4731 pci_disable_msix(pdev);
4732 goto pmcraid_isr_legacy;
4736 pinstance->num_hrrq = num_hrrq;
4737 pinstance->interrupt_mode = 1;
4738 iowrite32(DOORBELL_INTR_MODE_MSIX,
4739 pinstance->int_regs.host_ioa_interrupt_reg);
4740 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4741 goto pmcraid_isr_out;
4745 /* If MSI-X registration failed fallback to legacy mode, where
4746 * only one hrrq entry will be used
4748 pinstance->hrrq_vector[0].hrrq_id = 0;
4749 pinstance->hrrq_vector[0].drv_inst = pinstance;
4750 pinstance->hrrq_vector[0].vector = pdev->irq;
4751 pinstance->num_hrrq = 1;
4754 rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
4755 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
4761 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4762 * @pinstance: per adapter instance structure pointer
4763 * @max_index: number of buffer blocks to release
4769 pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4772 for (i = 0; i < max_index; i++) {
4773 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4774 pinstance->cmd_list[i] = NULL;
4776 kmem_cache_destroy(pinstance->cmd_cachep);
4777 pinstance->cmd_cachep = NULL;
4781 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4782 * @pinstance: pointer to per adapter instance structure
4783 * @max_index: number of buffers (from 0 onwards) to release
4785 * This function assumes that the command blocks for which control blocks are
4786 * linked are not released.
4792 pmcraid_release_control_blocks(
4793 struct pmcraid_instance *pinstance,
4799 if (pinstance->control_pool == NULL)
4802 for (i = 0; i < max_index; i++) {
4803 pci_pool_free(pinstance->control_pool,
4804 pinstance->cmd_list[i]->ioa_cb,
4805 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4806 pinstance->cmd_list[i]->ioa_cb = NULL;
4807 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4809 pci_pool_destroy(pinstance->control_pool);
4810 pinstance->control_pool = NULL;
4814 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4815 * @pinstance - pointer to per adapter instance structure
4817 * Allocates memory for command blocks using kernel slab allocator.
4820 * 0 in case of success; -ENOMEM in case of failure
4822 static int __devinit
4823 pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4827 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4828 pinstance->host->unique_id);
4831 pinstance->cmd_cachep = kmem_cache_create(
4832 pinstance->cmd_pool_name,
4833 sizeof(struct pmcraid_cmd), 0,
4834 SLAB_HWCACHE_ALIGN, NULL);
4835 if (!pinstance->cmd_cachep)
4838 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4839 pinstance->cmd_list[i] =
4840 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4841 if (!pinstance->cmd_list[i]) {
4842 pmcraid_release_cmd_blocks(pinstance, i);
4850 * pmcraid_allocate_control_blocks - allocates memory control blocks
4851 * @pinstance : pointer to per adapter instance structure
4853 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4854 * and IOASAs. This is called after command blocks are already allocated.
4857 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4859 static int __devinit
4860 pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4864 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4865 pinstance->host->unique_id);
4867 pinstance->control_pool =
4868 pci_pool_create(pinstance->ctl_pool_name,
4870 sizeof(struct pmcraid_control_block),
4871 PMCRAID_IOARCB_ALIGNMENT, 0);
4873 if (!pinstance->control_pool)
4876 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4877 pinstance->cmd_list[i]->ioa_cb =
4879 pinstance->control_pool,
4881 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4883 if (!pinstance->cmd_list[i]->ioa_cb) {
4884 pmcraid_release_control_blocks(pinstance, i);
4887 memset(pinstance->cmd_list[i]->ioa_cb, 0,
4888 sizeof(struct pmcraid_control_block));
4894 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4895 * @pinstance: pointer to per adapter instance structure
4896 * @maxindex: size of hrrq buffer pointer array
4902 pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4905 for (i = 0; i < maxindex; i++) {
4907 pci_free_consistent(pinstance->pdev,
4908 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4909 pinstance->hrrq_start[i],
4910 pinstance->hrrq_start_bus_addr[i]);
4912 /* reset pointers and toggle bit to zeros */
4913 pinstance->hrrq_start[i] = NULL;
4914 pinstance->hrrq_start_bus_addr[i] = 0;
4915 pinstance->host_toggle_bit[i] = 0;
4920 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4921 * @pinstance: pointer to per adapter instance structure
4924 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4926 static int __devinit
4927 pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4931 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4933 for (i = 0; i < pinstance->num_hrrq; i++) {
4934 pinstance->hrrq_start[i] =
4935 pci_alloc_consistent(
4938 &(pinstance->hrrq_start_bus_addr[i]));
4940 if (pinstance->hrrq_start[i] == 0) {
4941 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4943 pmcraid_release_host_rrqs(pinstance, i);
4947 memset(pinstance->hrrq_start[i], 0, buffer_size);
4948 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4949 pinstance->hrrq_end[i] =
4950 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4951 pinstance->host_toggle_bit[i] = 1;
4952 spin_lock_init(&pinstance->hrrq_lock[i]);
4958 * pmcraid_release_hcams - release HCAM buffers
4960 * @pinstance: pointer to per adapter instance structure
4965 static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4967 if (pinstance->ccn.msg != NULL) {
4968 pci_free_consistent(pinstance->pdev,
4969 PMCRAID_AEN_HDR_SIZE +
4970 sizeof(struct pmcraid_hcam_ccn_ext),
4972 pinstance->ccn.baddr);
4974 pinstance->ccn.msg = NULL;
4975 pinstance->ccn.hcam = NULL;
4976 pinstance->ccn.baddr = 0;
4979 if (pinstance->ldn.msg != NULL) {
4980 pci_free_consistent(pinstance->pdev,
4981 PMCRAID_AEN_HDR_SIZE +
4982 sizeof(struct pmcraid_hcam_ldn),
4984 pinstance->ldn.baddr);
4986 pinstance->ldn.msg = NULL;
4987 pinstance->ldn.hcam = NULL;
4988 pinstance->ldn.baddr = 0;
4993 * pmcraid_allocate_hcams - allocates HCAM buffers
4994 * @pinstance : pointer to per adapter instance structure
4997 * 0 in case of successful allocation, non-zero otherwise
4999 static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
5001 pinstance->ccn.msg = pci_alloc_consistent(
5003 PMCRAID_AEN_HDR_SIZE +
5004 sizeof(struct pmcraid_hcam_ccn_ext),
5005 &(pinstance->ccn.baddr));
5007 pinstance->ldn.msg = pci_alloc_consistent(
5009 PMCRAID_AEN_HDR_SIZE +
5010 sizeof(struct pmcraid_hcam_ldn),
5011 &(pinstance->ldn.baddr));
5013 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
5014 pmcraid_release_hcams(pinstance);
5016 pinstance->ccn.hcam =
5017 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
5018 pinstance->ldn.hcam =
5019 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
5021 atomic_set(&pinstance->ccn.ignore, 0);
5022 atomic_set(&pinstance->ldn.ignore, 0);
5025 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
5029 * pmcraid_release_config_buffers - release config.table buffers
5030 * @pinstance: pointer to per adapter instance structure
5035 static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
5037 if (pinstance->cfg_table != NULL &&
5038 pinstance->cfg_table_bus_addr != 0) {
5039 pci_free_consistent(pinstance->pdev,
5040 sizeof(struct pmcraid_config_table),
5041 pinstance->cfg_table,
5042 pinstance->cfg_table_bus_addr);
5043 pinstance->cfg_table = NULL;
5044 pinstance->cfg_table_bus_addr = 0;
5047 if (pinstance->res_entries != NULL) {
5050 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5051 list_del(&pinstance->res_entries[i].queue);
5052 kfree(pinstance->res_entries);
5053 pinstance->res_entries = NULL;
5056 pmcraid_release_hcams(pinstance);
5060 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5061 * @pinstance : pointer to per adapter instance structure
5064 * 0 for successful allocation, -ENOMEM for any failure
5066 static int __devinit
5067 pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
5071 pinstance->res_entries =
5072 kzalloc(sizeof(struct pmcraid_resource_entry) *
5073 PMCRAID_MAX_RESOURCES, GFP_KERNEL);
5075 if (NULL == pinstance->res_entries) {
5076 pmcraid_err("failed to allocate memory for resource table\n");
5080 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5081 list_add_tail(&pinstance->res_entries[i].queue,
5082 &pinstance->free_res_q);
5084 pinstance->cfg_table =
5085 pci_alloc_consistent(pinstance->pdev,
5086 sizeof(struct pmcraid_config_table),
5087 &pinstance->cfg_table_bus_addr);
5089 if (NULL == pinstance->cfg_table) {
5090 pmcraid_err("couldn't alloc DMA memory for config table\n");
5091 pmcraid_release_config_buffers(pinstance);
5095 if (pmcraid_allocate_hcams(pinstance)) {
5096 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5097 pmcraid_release_config_buffers(pinstance);
5105 * pmcraid_init_tasklets - registers tasklets for response handling
5107 * @pinstance: pointer adapter instance structure
5112 static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
5115 for (i = 0; i < pinstance->num_hrrq; i++)
5116 tasklet_init(&pinstance->isr_tasklet[i],
5117 pmcraid_tasklet_function,
5118 (unsigned long)&pinstance->hrrq_vector[i]);
5122 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5124 * @pinstance: pointer to adapter instance structure
5129 static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
5132 for (i = 0; i < pinstance->num_hrrq; i++)
5133 tasklet_kill(&pinstance->isr_tasklet[i]);
5137 * pmcraid_release_buffers - release per-adapter buffers allocated
5139 * @pinstance: pointer to adapter soft state
5144 static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
5146 pmcraid_release_config_buffers(pinstance);
5147 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
5148 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5149 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5151 if (pinstance->inq_data != NULL) {
5152 pci_free_consistent(pinstance->pdev,
5153 sizeof(struct pmcraid_inquiry_data),
5154 pinstance->inq_data,
5155 pinstance->inq_data_baddr);
5157 pinstance->inq_data = NULL;
5158 pinstance->inq_data_baddr = 0;
5161 if (pinstance->timestamp_data != NULL) {
5162 pci_free_consistent(pinstance->pdev,
5163 sizeof(struct pmcraid_timestamp_data),
5164 pinstance->timestamp_data,
5165 pinstance->timestamp_data_baddr);
5167 pinstance->timestamp_data = NULL;
5168 pinstance->timestamp_data_baddr = 0;
5173 * pmcraid_init_buffers - allocates memory and initializes various structures
5174 * @pinstance: pointer to per adapter instance structure
5176 * This routine pre-allocates memory based on the type of block as below:
5177 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5178 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5179 * config-table entries : DMAable memory using pci_alloc_consistent
5180 * HostRRQs : DMAable memory, using pci_alloc_consistent
5183 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5185 static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
5189 if (pmcraid_allocate_host_rrqs(pinstance)) {
5190 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5191 pinstance->num_hrrq);
5195 if (pmcraid_allocate_config_buffers(pinstance)) {
5196 pmcraid_err("couldn't allocate memory for config buffers\n");
5197 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5201 if (pmcraid_allocate_cmd_blocks(pinstance)) {
5202 pmcraid_err("couldn't allocate memory for cmd blocks\n");
5203 pmcraid_release_config_buffers(pinstance);
5204 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5208 if (pmcraid_allocate_control_blocks(pinstance)) {
5209 pmcraid_err("couldn't allocate memory control blocks\n");
5210 pmcraid_release_config_buffers(pinstance);
5211 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5212 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5216 /* allocate DMAable memory for page D0 INQUIRY buffer */
5217 pinstance->inq_data = pci_alloc_consistent(
5219 sizeof(struct pmcraid_inquiry_data),
5220 &pinstance->inq_data_baddr);
5222 if (pinstance->inq_data == NULL) {
5223 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5224 pmcraid_release_buffers(pinstance);
5228 /* allocate DMAable memory for set timestamp data buffer */
5229 pinstance->timestamp_data = pci_alloc_consistent(
5231 sizeof(struct pmcraid_timestamp_data),
5232 &pinstance->timestamp_data_baddr);
5234 if (pinstance->timestamp_data == NULL) {
5235 pmcraid_err("couldn't allocate DMA memory for \
5236 set time_stamp \n");
5237 pmcraid_release_buffers(pinstance);
5242 /* Initialize all the command blocks and add them to free pool. No
5243 * need to lock (free_pool_lock) as this is done in initialization
5246 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5247 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5248 pmcraid_init_cmdblk(cmdp, i);
5249 cmdp->drv_inst = pinstance;
5250 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5257 * pmcraid_reinit_buffers - resets various buffer pointers
5258 * @pinstance: pointer to adapter instance
5262 static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5265 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5267 for (i = 0; i < pinstance->num_hrrq; i++) {
5268 memset(pinstance->hrrq_start[i], 0, buffer_size);
5269 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5270 pinstance->hrrq_end[i] =
5271 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5272 pinstance->host_toggle_bit[i] = 1;
5277 * pmcraid_init_instance - initialize per instance data structure
5278 * @pdev: pointer to pci device structure
5279 * @host: pointer to Scsi_Host structure
5280 * @mapped_pci_addr: memory mapped IOA configuration registers
5283 * 0 on success, non-zero in case of any failure
5285 static int __devinit pmcraid_init_instance(
5286 struct pci_dev *pdev,
5287 struct Scsi_Host *host,
5288 void __iomem *mapped_pci_addr
5291 struct pmcraid_instance *pinstance =
5292 (struct pmcraid_instance *)host->hostdata;
5294 pinstance->host = host;
5295 pinstance->pdev = pdev;
5297 /* Initialize register addresses */
5298 pinstance->mapped_dma_addr = mapped_pci_addr;
5300 /* Initialize chip-specific details */
5302 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5303 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5305 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5307 pint_regs->ioa_host_interrupt_reg =
5308 mapped_pci_addr + chip_cfg->ioa_host_intr;
5309 pint_regs->ioa_host_interrupt_clr_reg =
5310 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
5311 pint_regs->ioa_host_msix_interrupt_reg =
5312 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
5313 pint_regs->host_ioa_interrupt_reg =
5314 mapped_pci_addr + chip_cfg->host_ioa_intr;
5315 pint_regs->host_ioa_interrupt_clr_reg =
5316 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5318 /* Current version of firmware exposes interrupt mask set
5319 * and mask clr registers through memory mapped bar0.
5321 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5322 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5323 pint_regs->ioa_host_interrupt_mask_reg =
5324 mapped_pci_addr + chip_cfg->ioa_host_mask;
5325 pint_regs->ioa_host_interrupt_mask_clr_reg =
5326 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5327 pint_regs->global_interrupt_mask_reg =
5328 mapped_pci_addr + chip_cfg->global_intr_mask;
5331 pinstance->ioa_reset_attempts = 0;
5332 init_waitqueue_head(&pinstance->reset_wait_q);
5334 atomic_set(&pinstance->outstanding_cmds, 0);
5335 atomic_set(&pinstance->last_message_id, 0);
5336 atomic_set(&pinstance->expose_resources, 0);
5338 INIT_LIST_HEAD(&pinstance->free_res_q);
5339 INIT_LIST_HEAD(&pinstance->used_res_q);
5340 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5341 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5343 spin_lock_init(&pinstance->free_pool_lock);
5344 spin_lock_init(&pinstance->pending_pool_lock);
5345 spin_lock_init(&pinstance->resource_lock);
5346 mutex_init(&pinstance->aen_queue_lock);
5348 /* Work-queue (Shared) for deferred processing error handling */
5349 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5351 /* Initialize the default log_level */
5352 pinstance->current_log_level = pmcraid_log_level;
5354 /* Setup variables required for reset engine */
5355 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5356 pinstance->reset_cmd = NULL;
5361 * pmcraid_shutdown - shutdown adapter controller.
5362 * @pdev: pci device struct
5364 * Issues an adapter shutdown to the card waits for its completion
5369 static void pmcraid_shutdown(struct pci_dev *pdev)
5371 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5372 pmcraid_reset_bringdown(pinstance);
5377 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5379 static unsigned short pmcraid_get_minor(void)
5383 minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
5384 __set_bit(minor, pmcraid_minor);
5389 * pmcraid_release_minor - releases given minor back to minor number bitmap
5391 static void pmcraid_release_minor(unsigned short minor)
5393 __clear_bit(minor, pmcraid_minor);
5397 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5399 * @pinstance: pointer to adapter instance for which to register device
5402 * 0 in case of success, otherwise non-zero
5404 static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5409 minor = pmcraid_get_minor();
5410 cdev_init(&pinstance->cdev, &pmcraid_fops);
5411 pinstance->cdev.owner = THIS_MODULE;
5413 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5416 pmcraid_release_minor(minor);
5418 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
5419 NULL, "%s%u", PMCRAID_DEVFILE, minor);
5424 * pmcraid_release_chrdev - unregisters per-adapter management interface
5426 * @pinstance: pointer to adapter instance structure
5431 static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5433 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5434 device_destroy(pmcraid_class,
5435 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5436 cdev_del(&pinstance->cdev);
5440 * pmcraid_remove - IOA hot plug remove entry point
5441 * @pdev: pci device struct
5446 static void __devexit pmcraid_remove(struct pci_dev *pdev)
5448 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5450 /* remove the management interface (/dev file) for this device */
5451 pmcraid_release_chrdev(pinstance);
5453 /* remove host template from scsi midlayer */
5454 scsi_remove_host(pinstance->host);
5456 /* block requests from mid-layer */
5457 scsi_block_requests(pinstance->host);
5459 /* initiate shutdown adapter */
5460 pmcraid_shutdown(pdev);
5462 pmcraid_disable_interrupts(pinstance, ~0);
5463 flush_work_sync(&pinstance->worker_q);
5465 pmcraid_kill_tasklets(pinstance);
5466 pmcraid_unregister_interrupt_handler(pinstance);
5467 pmcraid_release_buffers(pinstance);
5468 iounmap(pinstance->mapped_dma_addr);
5469 pci_release_regions(pdev);
5470 scsi_host_put(pinstance->host);
5471 pci_disable_device(pdev);
5478 * pmcraid_suspend - driver suspend entry point for power management
5479 * @pdev: PCI device structure
5480 * @state: PCI power state to suspend routine
5482 * Return Value - 0 always
5484 static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
5486 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5488 pmcraid_shutdown(pdev);
5489 pmcraid_disable_interrupts(pinstance, ~0);
5490 pmcraid_kill_tasklets(pinstance);
5491 pci_set_drvdata(pinstance->pdev, pinstance);
5492 pmcraid_unregister_interrupt_handler(pinstance);
5493 pci_save_state(pdev);
5494 pci_disable_device(pdev);
5495 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5501 * pmcraid_resume - driver resume entry point PCI power management
5502 * @pdev: PCI device structure
5504 * Return Value - 0 in case of success. Error code in case of any failure
5506 static int pmcraid_resume(struct pci_dev *pdev)
5508 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5509 struct Scsi_Host *host = pinstance->host;
5512 pci_set_power_state(pdev, PCI_D0);
5513 pci_enable_wake(pdev, PCI_D0, 0);
5514 pci_restore_state(pdev);
5516 rc = pci_enable_device(pdev);
5519 dev_err(&pdev->dev, "resume: Enable device failed\n");
5523 pci_set_master(pdev);
5525 if ((sizeof(dma_addr_t) == 4) ||
5526 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5527 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5530 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5533 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
5534 goto disable_device;
5537 pmcraid_disable_interrupts(pinstance, ~0);
5538 atomic_set(&pinstance->outstanding_cmds, 0);
5539 rc = pmcraid_register_interrupt_handler(pinstance);
5543 "resume: couldn't register interrupt handlers\n");
5548 pmcraid_init_tasklets(pinstance);
5549 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5551 /* Start with hard reset sequence which brings up IOA to operational
5552 * state as well as completes the reset sequence.
5554 pinstance->ioa_hard_reset = 1;
5556 /* Start IOA firmware initialization and bring card to Operational
5559 if (pmcraid_reset_bringup(pinstance)) {
5560 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5562 goto release_tasklets;
5568 pmcraid_disable_interrupts(pinstance, ~0);
5569 pmcraid_kill_tasklets(pinstance);
5570 pmcraid_unregister_interrupt_handler(pinstance);
5573 scsi_host_put(host);
5576 pci_disable_device(pdev);
5583 #define pmcraid_suspend NULL
5584 #define pmcraid_resume NULL
5586 #endif /* CONFIG_PM */
5589 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5590 * completion of the ioa reset
5591 * @cmd: pointer to reset command block
5593 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5595 struct pmcraid_instance *pinstance = cmd->drv_inst;
5596 unsigned long flags;
5598 spin_lock_irqsave(pinstance->host->host_lock, flags);
5599 pmcraid_ioa_reset(cmd);
5600 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5601 scsi_unblock_requests(pinstance->host);
5602 schedule_work(&pinstance->worker_q);
5606 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5608 * @cmd: pointer to pmcraid_cmd structure
5611 * 0 for success or non-zero for failure cases
5613 static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5615 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5616 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5618 pmcraid_reinit_cmdblk(cmd);
5620 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5621 ioarcb->request_type = REQ_TYPE_IOACMD;
5622 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5623 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5625 /* If this was called as part of resource table reinitialization due to
5626 * lost CCN, it is enough to return the command block back to free pool
5627 * as part of set_supported_devs completion function.
5629 if (cmd->drv_inst->reinit_cfg_table) {
5630 cmd->drv_inst->reinit_cfg_table = 0;
5632 cmd_done = pmcraid_reinit_cfgtable_done;
5635 /* we will be done with the reset sequence after set supported devices,
5636 * setup the done function to return the command block back to free
5639 pmcraid_send_cmd(cmd,
5641 PMCRAID_SET_SUP_DEV_TIMEOUT,
5642 pmcraid_timeout_handler);
5647 * pmcraid_set_timestamp - set the timestamp to IOAFP
5649 * @cmd: pointer to pmcraid_cmd structure
5652 * 0 for success or non-zero for failure cases
5654 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5656 struct pmcraid_instance *pinstance = cmd->drv_inst;
5657 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5658 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5659 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5664 do_gettimeofday(&tv);
5665 timestamp = tv.tv_sec * 1000;
5667 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5668 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5669 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5670 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5671 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5672 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5674 pmcraid_reinit_cmdblk(cmd);
5675 ioarcb->request_type = REQ_TYPE_SCSI;
5676 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5677 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5678 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5679 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5681 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5682 offsetof(struct pmcraid_ioarcb,
5683 add_data.u.ioadl[0]));
5684 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5685 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5687 ioarcb->request_flags0 |= NO_LINK_DESCS;
5688 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5689 ioarcb->data_transfer_length =
5690 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5691 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5692 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5693 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5694 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5696 if (!pinstance->timestamp_error) {
5697 pinstance->timestamp_error = 0;
5698 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5699 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5701 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5702 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5709 * pmcraid_init_res_table - Initialize the resource table
5710 * @cmd: pointer to pmcraid command struct
5712 * This function looks through the existing resource table, comparing
5713 * it with the config table. This function will take care of old/new
5714 * devices and schedule adding/removing them from the mid-layer
5720 static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5722 struct pmcraid_instance *pinstance = cmd->drv_inst;
5723 struct pmcraid_resource_entry *res, *temp;
5724 struct pmcraid_config_table_entry *cfgte;
5725 unsigned long lock_flags;
5730 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
5731 pmcraid_err("IOA requires microcode download\n");
5733 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5735 /* resource list is protected by pinstance->resource_lock.
5736 * init_res_table can be called from probe (user-thread) or runtime
5737 * reset (timer/tasklet)
5739 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5741 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5742 list_move_tail(&res->queue, &old_res);
5744 for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
5745 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5746 PMCRAID_FW_VERSION_1)
5747 cfgte = &pinstance->cfg_table->entries[i];
5749 cfgte = (struct pmcraid_config_table_entry *)
5750 &pinstance->cfg_table->entries_ext[i];
5752 if (!pmcraid_expose_resource(fw_version, cfgte))
5757 /* If this entry was already detected and initialized */
5758 list_for_each_entry_safe(res, temp, &old_res, queue) {
5760 rc = memcmp(&res->cfg_entry.resource_address,
5761 &cfgte->resource_address,
5762 sizeof(cfgte->resource_address));
5764 list_move_tail(&res->queue,
5765 &pinstance->used_res_q);
5771 /* If this is new entry, initialize it and add it the queue */
5774 if (list_empty(&pinstance->free_res_q)) {
5775 pmcraid_err("Too many devices attached\n");
5780 res = list_entry(pinstance->free_res_q.next,
5781 struct pmcraid_resource_entry, queue);
5783 res->scsi_dev = NULL;
5784 res->change_detected = RES_CHANGE_ADD;
5785 res->reset_progress = 0;
5786 list_move_tail(&res->queue, &pinstance->used_res_q);
5789 /* copy new configuration table entry details into driver
5790 * maintained resource entry
5793 memcpy(&res->cfg_entry, cfgte,
5794 pinstance->config_table_entry_size);
5795 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5796 res->cfg_entry.resource_type,
5797 (fw_version <= PMCRAID_FW_VERSION_1 ?
5798 res->cfg_entry.unique_flags1 :
5799 res->cfg_entry.array_id & 0xFF),
5800 le32_to_cpu(res->cfg_entry.resource_address));
5804 /* Detect any deleted entries, mark them for deletion from mid-layer */
5805 list_for_each_entry_safe(res, temp, &old_res, queue) {
5807 if (res->scsi_dev) {
5808 res->change_detected = RES_CHANGE_DEL;
5809 res->cfg_entry.resource_handle =
5810 PMCRAID_INVALID_RES_HANDLE;
5811 list_move_tail(&res->queue, &pinstance->used_res_q);
5813 list_move_tail(&res->queue, &pinstance->free_res_q);
5817 /* release the resource list lock */
5818 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5819 pmcraid_set_timestamp(cmd);
5823 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5824 * @cmd: pointer pmcraid_cmd struct
5826 * This function sends a Query IOA Configuration command to the adapter to
5827 * retrieve the IOA configuration table.
5832 static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5834 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5835 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5836 struct pmcraid_instance *pinstance = cmd->drv_inst;
5837 int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5839 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5840 PMCRAID_FW_VERSION_1)
5841 pinstance->config_table_entry_size =
5842 sizeof(struct pmcraid_config_table_entry);
5844 pinstance->config_table_entry_size =
5845 sizeof(struct pmcraid_config_table_entry_ext);
5847 ioarcb->request_type = REQ_TYPE_IOACMD;
5848 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5850 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5852 /* firmware requires 4-byte length field, specified in B.E format */
5853 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5855 /* Since entire config table can be described by single IOADL, it can
5856 * be part of IOARCB itself
5858 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5859 offsetof(struct pmcraid_ioarcb,
5860 add_data.u.ioadl[0]));
5861 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5862 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5864 ioarcb->request_flags0 |= NO_LINK_DESCS;
5865 ioarcb->data_transfer_length =
5866 cpu_to_le32(sizeof(struct pmcraid_config_table));
5868 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5869 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5870 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5871 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5873 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5874 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5879 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5880 * @pdev: pointer to pci device structure
5881 * @dev_id: pointer to device ids structure
5884 * returns 0 if the device is claimed and successfully configured.
5885 * returns non-zero error code in case of any failure
5887 static int __devinit pmcraid_probe(
5888 struct pci_dev *pdev,
5889 const struct pci_device_id *dev_id
5892 struct pmcraid_instance *pinstance;
5893 struct Scsi_Host *host;
5894 void __iomem *mapped_pci_addr;
5895 int rc = PCIBIOS_SUCCESSFUL;
5897 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5899 ("maximum number(%d) of supported adapters reached\n",
5900 atomic_read(&pmcraid_adapter_count));
5904 atomic_inc(&pmcraid_adapter_count);
5905 rc = pci_enable_device(pdev);
5908 dev_err(&pdev->dev, "Cannot enable adapter\n");
5909 atomic_dec(&pmcraid_adapter_count);
5913 dev_info(&pdev->dev,
5914 "Found new IOA(%x:%x), Total IOA count: %d\n",
5915 pdev->vendor, pdev->device,
5916 atomic_read(&pmcraid_adapter_count));
5918 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5922 "Couldn't register memory range of registers\n");
5923 goto out_disable_device;
5926 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5928 if (!mapped_pci_addr) {
5929 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5931 goto out_release_regions;
5934 pci_set_master(pdev);
5936 /* Firmware requires the system bus address of IOARCB to be within
5937 * 32-bit addressable range though it has 64-bit IOARRIN register.
5938 * However, firmware supports 64-bit streaming DMA buffers, whereas
5939 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5940 * returns memory within 4GB (if not, change this logic), coherent
5941 * buffers are within firmware acceptable address ranges.
5943 if ((sizeof(dma_addr_t) == 4) ||
5944 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5945 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5947 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5948 * bit mask for pci_alloc_consistent to return addresses within 4GB
5951 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5954 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5958 host = scsi_host_alloc(&pmcraid_host_template,
5959 sizeof(struct pmcraid_instance));
5962 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5967 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5968 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5969 host->unique_id = host->host_no;
5970 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5971 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5973 /* zero out entire instance structure */
5974 pinstance = (struct pmcraid_instance *)host->hostdata;
5975 memset(pinstance, 0, sizeof(*pinstance));
5977 pinstance->chip_cfg =
5978 (struct pmcraid_chip_details *)(dev_id->driver_data);
5980 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5983 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5984 goto out_scsi_host_put;
5987 pci_set_drvdata(pdev, pinstance);
5989 /* Save PCI config-space for use following the reset */
5990 rc = pci_save_state(pinstance->pdev);
5993 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5994 goto out_scsi_host_put;
5997 pmcraid_disable_interrupts(pinstance, ~0);
5999 rc = pmcraid_register_interrupt_handler(pinstance);
6002 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
6003 goto out_scsi_host_put;
6006 pmcraid_init_tasklets(pinstance);
6008 /* allocate verious buffers used by LLD.*/
6009 rc = pmcraid_init_buffers(pinstance);
6012 pmcraid_err("couldn't allocate memory blocks\n");
6013 goto out_unregister_isr;
6016 /* check the reset type required */
6017 pmcraid_reset_type(pinstance);
6019 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
6021 /* Start IOA firmware initialization and bring card to Operational
6024 pmcraid_info("starting IOA initialization sequence\n");
6025 if (pmcraid_reset_bringup(pinstance)) {
6026 dev_err(&pdev->dev, "couldn't initialize IOA\n");
6028 goto out_release_bufs;
6031 /* Add adapter instance into mid-layer list */
6032 rc = scsi_add_host(pinstance->host, &pdev->dev);
6034 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
6035 goto out_release_bufs;
6038 scsi_scan_host(pinstance->host);
6040 rc = pmcraid_setup_chrdev(pinstance);
6043 pmcraid_err("couldn't create mgmt interface, error: %x\n",
6045 goto out_remove_host;
6048 /* Schedule worker thread to handle CCN and take care of adding and
6049 * removing devices to OS
6051 atomic_set(&pinstance->expose_resources, 1);
6052 schedule_work(&pinstance->worker_q);
6056 scsi_remove_host(host);
6059 pmcraid_release_buffers(pinstance);
6062 pmcraid_kill_tasklets(pinstance);
6063 pmcraid_unregister_interrupt_handler(pinstance);
6066 scsi_host_put(host);
6069 iounmap(mapped_pci_addr);
6071 out_release_regions:
6072 pci_release_regions(pdev);
6075 atomic_dec(&pmcraid_adapter_count);
6076 pci_set_drvdata(pdev, NULL);
6077 pci_disable_device(pdev);
6082 * PCI driver structure of pcmraid driver
6084 static struct pci_driver pmcraid_driver = {
6085 .name = PMCRAID_DRIVER_NAME,
6086 .id_table = pmcraid_pci_table,
6087 .probe = pmcraid_probe,
6088 .remove = pmcraid_remove,
6089 .suspend = pmcraid_suspend,
6090 .resume = pmcraid_resume,
6091 .shutdown = pmcraid_shutdown
6095 * pmcraid_init - module load entry point
6097 static int __init pmcraid_init(void)
6102 pmcraid_info("%s Device Driver version: %s\n",
6103 PMCRAID_DRIVER_NAME, PMCRAID_DRIVER_VERSION);
6105 error = alloc_chrdev_region(&dev, 0,
6106 PMCRAID_MAX_ADAPTERS,
6110 pmcraid_err("failed to get a major number for adapters\n");
6114 pmcraid_major = MAJOR(dev);
6115 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
6117 if (IS_ERR(pmcraid_class)) {
6118 error = PTR_ERR(pmcraid_class);
6119 pmcraid_err("failed to register with with sysfs, error = %x\n",
6121 goto out_unreg_chrdev;
6124 error = pmcraid_netlink_init();
6127 goto out_unreg_chrdev;
6129 error = pci_register_driver(&pmcraid_driver);
6134 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6136 class_destroy(pmcraid_class);
6137 pmcraid_netlink_release();
6140 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
6147 * pmcraid_exit - module unload entry point
6149 static void __exit pmcraid_exit(void)
6151 pmcraid_netlink_release();
6152 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
6153 PMCRAID_MAX_ADAPTERS);
6154 pci_unregister_driver(&pmcraid_driver);
6155 class_destroy(pmcraid_class);
6158 module_init(pmcraid_init);
6159 module_exit(pmcraid_exit);