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;
67 * Data structures to support multiple adapters by the LLD.
68 * pmcraid_adapter_count - count of configured adapters
70 static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
73 * Supporting user-level control interface through IOCTL commands.
74 * pmcraid_major - major number to use
75 * pmcraid_minor - minor number(s) to use
77 static unsigned int pmcraid_major;
78 static struct class *pmcraid_class;
79 DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
84 MODULE_AUTHOR("Anil Ravindranath<anil_ravindranath@pmc-sierra.com>");
85 MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(PMCRAID_DRIVER_VERSION);
89 module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
90 MODULE_PARM_DESC(log_level,
91 "Enables firmware error code logging, default :1 high-severity"
92 " errors, 2: all errors including high-severity errors,"
93 " 0: disables logging");
95 module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
96 MODULE_PARM_DESC(debug,
97 "Enable driver verbose message logging. Set 1 to enable."
100 module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
101 MODULE_PARM_DESC(disable_aen,
102 "Disable driver aen notifications to apps. Set 1 to disable."
105 /* chip specific constants for PMC MaxRAID controllers (same for
108 static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
113 .global_intr_mask = 0x00034,
114 .ioa_host_intr = 0x0009C,
115 .ioa_host_intr_clr = 0x000A0,
116 .ioa_host_msix_intr = 0x7FC40,
117 .ioa_host_mask = 0x7FC28,
118 .ioa_host_mask_clr = 0x7FC28,
119 .host_ioa_intr = 0x00020,
120 .host_ioa_intr_clr = 0x00020,
121 .transop_timeout = 300
126 * PCI device ids supported by pmcraid driver
128 static struct pci_device_id pmcraid_pci_table[] __devinitdata = {
129 { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
130 0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
135 MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
140 * pmcraid_slave_alloc - Prepare for commands to a device
141 * @scsi_dev: scsi device struct
143 * This function is called by mid-layer prior to sending any command to the new
144 * device. Stores resource entry details of the device in scsi_device struct.
145 * Queuecommand uses the resource handle and other details to fill up IOARCB
146 * while sending commands to the device.
149 * 0 on success / -ENXIO if device does not exist
151 static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
153 struct pmcraid_resource_entry *temp, *res = NULL;
154 struct pmcraid_instance *pinstance;
156 unsigned long lock_flags;
160 pinstance = shost_priv(scsi_dev->host);
162 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
164 /* Driver exposes VSET and GSCSI resources only; all other device types
165 * are not exposed. Resource list is synchronized using resource lock
166 * so any traversal or modifications to the list should be done inside
169 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
170 list_for_each_entry(temp, &pinstance->used_res_q, queue) {
172 /* do not expose VSETs with order-ids > MAX_VSET_TARGETS */
173 if (RES_IS_VSET(temp->cfg_entry)) {
174 if (fw_version <= PMCRAID_FW_VERSION_1)
175 target = temp->cfg_entry.unique_flags1;
177 target = temp->cfg_entry.array_id & 0xFF;
179 if (target > PMCRAID_MAX_VSET_TARGETS)
181 bus = PMCRAID_VSET_BUS_ID;
183 } else if (RES_IS_GSCSI(temp->cfg_entry)) {
184 target = RES_TARGET(temp->cfg_entry.resource_address);
185 bus = PMCRAID_PHYS_BUS_ID;
186 lun = RES_LUN(temp->cfg_entry.resource_address);
191 if (bus == scsi_dev->channel &&
192 target == scsi_dev->id &&
193 lun == scsi_dev->lun) {
200 res->scsi_dev = scsi_dev;
201 scsi_dev->hostdata = res;
202 res->change_detected = 0;
203 atomic_set(&res->read_failures, 0);
204 atomic_set(&res->write_failures, 0);
207 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
212 * pmcraid_slave_configure - Configures a SCSI device
213 * @scsi_dev: scsi device struct
215 * This fucntion is executed by SCSI mid layer just after a device is first
216 * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
217 * timeout value (default 30s) will be over-written to a higher value (60s)
218 * and max_sectors value will be over-written to 512. It also sets queue depth
219 * to host->cmd_per_lun value
224 static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
226 struct pmcraid_resource_entry *res = scsi_dev->hostdata;
231 /* LLD exposes VSETs and Enclosure devices only */
232 if (RES_IS_GSCSI(res->cfg_entry) &&
233 scsi_dev->type != TYPE_ENCLOSURE)
236 pmcraid_info("configuring %x:%x:%x:%x\n",
237 scsi_dev->host->unique_id,
242 if (RES_IS_GSCSI(res->cfg_entry)) {
243 scsi_dev->allow_restart = 1;
244 } else if (RES_IS_VSET(res->cfg_entry)) {
245 scsi_dev->allow_restart = 1;
246 blk_queue_rq_timeout(scsi_dev->request_queue,
247 PMCRAID_VSET_IO_TIMEOUT);
248 blk_queue_max_hw_sectors(scsi_dev->request_queue,
249 PMCRAID_VSET_MAX_SECTORS);
252 if (scsi_dev->tagged_supported &&
253 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
254 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
255 scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
256 scsi_dev->host->cmd_per_lun);
258 scsi_adjust_queue_depth(scsi_dev, 0,
259 scsi_dev->host->cmd_per_lun);
266 * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
268 * @scsi_dev: scsi device struct
270 * This is called by mid-layer before removing a device. Pointer assignments
271 * done in pmcraid_slave_alloc will be reset to NULL here.
276 static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
278 struct pmcraid_resource_entry *res;
280 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
283 res->scsi_dev = NULL;
285 scsi_dev->hostdata = NULL;
289 * pmcraid_change_queue_depth - Change the device's queue depth
290 * @scsi_dev: scsi device struct
291 * @depth: depth to set
292 * @reason: calling context
297 static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth,
300 if (reason != SCSI_QDEPTH_DEFAULT)
303 if (depth > PMCRAID_MAX_CMD_PER_LUN)
304 depth = PMCRAID_MAX_CMD_PER_LUN;
306 scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
308 return scsi_dev->queue_depth;
312 * pmcraid_change_queue_type - Change the device's queue type
313 * @scsi_dev: scsi device struct
314 * @tag: type of tags to use
317 * actual queue type set
319 static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
321 struct pmcraid_resource_entry *res;
323 res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
325 if ((res) && scsi_dev->tagged_supported &&
326 (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
327 scsi_set_tag_type(scsi_dev, tag);
330 scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
332 scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
341 * pmcraid_init_cmdblk - initializes a command block
343 * @cmd: pointer to struct pmcraid_cmd to be initialized
344 * @index: if >=0 first time initialization; otherwise reinitialization
349 void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
351 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
352 dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
355 /* first time initialization (called from probe) */
357 offsetof(struct pmcraid_control_block, ioasa);
360 ioarcb->response_handle = cpu_to_le32(index << 2);
361 ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
362 ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
363 ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
365 /* re-initialization of various lengths, called once command is
368 memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
370 ioarcb->request_flags0 = 0;
371 ioarcb->request_flags1 = 0;
372 ioarcb->cmd_timeout = 0;
373 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
374 ioarcb->ioadl_bus_addr = 0;
375 ioarcb->ioadl_length = 0;
376 ioarcb->data_transfer_length = 0;
377 ioarcb->add_cmd_param_length = 0;
378 ioarcb->add_cmd_param_offset = 0;
379 cmd->ioa_cb->ioasa.ioasc = 0;
380 cmd->ioa_cb->ioasa.residual_data_length = 0;
384 cmd->cmd_done = NULL;
385 cmd->scsi_cmd = NULL;
387 cmd->completion_req = 0;
388 cmd->sense_buffer = 0;
389 cmd->sense_buffer_dma = 0;
391 init_timer(&cmd->timer);
395 * pmcraid_reinit_cmdblk - reinitialize a command block
397 * @cmd: pointer to struct pmcraid_cmd to be reinitialized
402 static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
404 pmcraid_init_cmdblk(cmd, -1);
408 * pmcraid_get_free_cmd - get a free cmd block from command block pool
409 * @pinstance: adapter instance structure
412 * returns pointer to cmd block or NULL if no blocks are available
414 static struct pmcraid_cmd *pmcraid_get_free_cmd(
415 struct pmcraid_instance *pinstance
418 struct pmcraid_cmd *cmd = NULL;
419 unsigned long lock_flags;
421 /* free cmd block list is protected by free_pool_lock */
422 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
424 if (!list_empty(&pinstance->free_cmd_pool)) {
425 cmd = list_entry(pinstance->free_cmd_pool.next,
426 struct pmcraid_cmd, free_list);
427 list_del(&cmd->free_list);
429 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
431 /* Initialize the command block before giving it the caller */
433 pmcraid_reinit_cmdblk(cmd);
438 * pmcraid_return_cmd - return a completed command block back into free pool
439 * @cmd: pointer to the command block
444 void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
446 struct pmcraid_instance *pinstance = cmd->drv_inst;
447 unsigned long lock_flags;
449 spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
450 list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
451 spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
455 * pmcraid_read_interrupts - reads IOA interrupts
457 * @pinstance: pointer to adapter instance structure
460 * interrupts read from IOA
462 static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
464 return (pinstance->interrupt_mode) ?
465 ioread32(pinstance->int_regs.ioa_host_msix_interrupt_reg) :
466 ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
470 * pmcraid_disable_interrupts - Masks and clears all specified interrupts
472 * @pinstance: pointer to per adapter instance structure
473 * @intrs: interrupts to disable
478 static void pmcraid_disable_interrupts(
479 struct pmcraid_instance *pinstance,
483 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
484 u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
486 iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
487 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
488 ioread32(pinstance->int_regs.global_interrupt_mask_reg);
490 if (!pinstance->interrupt_mode) {
492 pinstance->int_regs.ioa_host_interrupt_mask_reg);
493 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
498 * pmcraid_enable_interrupts - Enables specified interrupts
500 * @pinstance: pointer to per adapter instance structure
501 * @intr: interrupts to enable
506 static void pmcraid_enable_interrupts(
507 struct pmcraid_instance *pinstance,
511 u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
512 u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
514 iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
516 if (!pinstance->interrupt_mode) {
518 pinstance->int_regs.ioa_host_interrupt_mask_reg);
519 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
522 pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
523 ioread32(pinstance->int_regs.global_interrupt_mask_reg),
524 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
528 * pmcraid_clr_trans_op - clear trans to op interrupt
530 * @pinstance: pointer to per adapter instance structure
535 static void pmcraid_clr_trans_op(
536 struct pmcraid_instance *pinstance
539 unsigned long lock_flags;
541 if (!pinstance->interrupt_mode) {
542 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
543 pinstance->int_regs.ioa_host_interrupt_mask_reg);
544 ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
545 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
546 pinstance->int_regs.ioa_host_interrupt_clr_reg);
547 ioread32(pinstance->int_regs.ioa_host_interrupt_clr_reg);
550 if (pinstance->reset_cmd != NULL) {
551 del_timer(&pinstance->reset_cmd->timer);
553 pinstance->host->host_lock, lock_flags);
554 pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
555 spin_unlock_irqrestore(
556 pinstance->host->host_lock, lock_flags);
561 * pmcraid_reset_type - Determine the required reset type
562 * @pinstance: pointer to adapter instance structure
564 * IOA requires hard reset if any of the following conditions is true.
565 * 1. If HRRQ valid interrupt is not masked
566 * 2. IOA reset alert doorbell is set
567 * 3. If there are any error interrupts
569 static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
575 mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
576 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
577 alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
579 if ((mask & INTRS_HRRQ_VALID) == 0 ||
580 (alerts & DOORBELL_IOA_RESET_ALERT) ||
581 (intrs & PMCRAID_ERROR_INTERRUPTS)) {
582 pmcraid_info("IOA requires hard reset\n");
583 pinstance->ioa_hard_reset = 1;
586 /* If unit check is active, trigger the dump */
587 if (intrs & INTRS_IOA_UNIT_CHECK)
588 pinstance->ioa_unit_check = 1;
592 * pmcraid_bist_done - completion function for PCI BIST
593 * @cmd: pointer to reset command
598 static void pmcraid_ioa_reset(struct pmcraid_cmd *);
600 static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
602 struct pmcraid_instance *pinstance = cmd->drv_inst;
603 unsigned long lock_flags;
607 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
609 /* If PCI config space can't be accessed wait for another two secs */
610 if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
611 cmd->time_left > 0) {
612 pmcraid_info("BIST not complete, waiting another 2 secs\n");
613 cmd->timer.expires = jiffies + cmd->time_left;
615 cmd->timer.data = (unsigned long)cmd;
616 cmd->timer.function =
617 (void (*)(unsigned long))pmcraid_bist_done;
618 add_timer(&cmd->timer);
621 pmcraid_info("BIST is complete, proceeding with reset\n");
622 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
623 pmcraid_ioa_reset(cmd);
624 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
629 * pmcraid_start_bist - starts BIST
630 * @cmd: pointer to reset cmd
634 static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
636 struct pmcraid_instance *pinstance = cmd->drv_inst;
637 u32 doorbells, intrs;
639 /* proceed with bist and wait for 2 seconds */
640 iowrite32(DOORBELL_IOA_START_BIST,
641 pinstance->int_regs.host_ioa_interrupt_reg);
642 doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
643 intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
644 pmcraid_info("doorbells after start bist: %x intrs: %x\n",
647 cmd->time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
648 cmd->timer.data = (unsigned long)cmd;
649 cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
650 cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
651 add_timer(&cmd->timer);
655 * pmcraid_reset_alert_done - completion routine for reset_alert
656 * @cmd: pointer to command block used in reset sequence
660 static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
662 struct pmcraid_instance *pinstance = cmd->drv_inst;
663 u32 status = ioread32(pinstance->ioa_status);
664 unsigned long lock_flags;
666 /* if the critical operation in progress bit is set or the wait times
667 * out, invoke reset engine to proceed with hard reset. If there is
668 * some more time to wait, restart the timer
670 if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
671 cmd->time_left <= 0) {
672 pmcraid_info("critical op is reset proceeding with reset\n");
673 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
674 pmcraid_ioa_reset(cmd);
675 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
677 pmcraid_info("critical op is not yet reset waiting again\n");
678 /* restart timer if some more time is available to wait */
679 cmd->time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
680 cmd->timer.data = (unsigned long)cmd;
681 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
682 cmd->timer.function =
683 (void (*)(unsigned long))pmcraid_reset_alert_done;
684 add_timer(&cmd->timer);
689 * pmcraid_reset_alert - alerts IOA for a possible reset
690 * @cmd : command block to be used for reset sequence.
693 * returns 0 if pci config-space is accessible and RESET_DOORBELL is
694 * successfully written to IOA. Returns non-zero in case pci_config_space
697 static void pmcraid_notify_ioastate(struct pmcraid_instance *, u32);
698 static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
700 struct pmcraid_instance *pinstance = cmd->drv_inst;
705 /* If we are able to access IOA PCI config space, alert IOA that we are
706 * going to reset it soon. This enables IOA to preserv persistent error
707 * data if any. In case memory space is not accessible, proceed with
710 rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
711 if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
713 /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
714 * reset IOA doesn't generate any interrupts when CRITICAL
715 * OPERATION bit is reset. A timer is started to wait for this
718 cmd->time_left = PMCRAID_RESET_TIMEOUT;
719 cmd->timer.data = (unsigned long)cmd;
720 cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
721 cmd->timer.function =
722 (void (*)(unsigned long))pmcraid_reset_alert_done;
723 add_timer(&cmd->timer);
725 iowrite32(DOORBELL_IOA_RESET_ALERT,
726 pinstance->int_regs.host_ioa_interrupt_reg);
728 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
729 pmcraid_info("doorbells after reset alert: %x\n", doorbells);
731 pmcraid_info("PCI config is not accessible starting BIST\n");
732 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
733 pmcraid_start_bist(cmd);
738 * pmcraid_timeout_handler - Timeout handler for internally generated ops
740 * @cmd : pointer to command structure, that got timedout
742 * This function blocks host requests and initiates an adapter reset.
747 static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
749 struct pmcraid_instance *pinstance = cmd->drv_inst;
750 unsigned long lock_flags;
752 dev_info(&pinstance->pdev->dev,
753 "Adapter being reset due to cmd(CDB[0] = %x) timeout\n",
754 cmd->ioa_cb->ioarcb.cdb[0]);
756 /* Command timeouts result in hard reset sequence. The command that got
757 * timed out may be the one used as part of reset sequence. In this
758 * case restart reset sequence using the same command block even if
759 * reset is in progress. Otherwise fail this command and get a free
760 * command block to restart the reset sequence.
762 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
763 if (!pinstance->ioa_reset_in_progress) {
764 pinstance->ioa_reset_attempts = 0;
765 cmd = pmcraid_get_free_cmd(pinstance);
767 /* If we are out of command blocks, just return here itself.
768 * Some other command's timeout handler can do the reset job
771 spin_unlock_irqrestore(pinstance->host->host_lock,
773 pmcraid_err("no free cmnd block for timeout handler\n");
777 pinstance->reset_cmd = cmd;
778 pinstance->ioa_reset_in_progress = 1;
780 pmcraid_info("reset is already in progress\n");
782 if (pinstance->reset_cmd != cmd) {
783 /* This command should have been given to IOA, this
784 * command will be completed by fail_outstanding_cmds
787 pmcraid_err("cmd is pending but reset in progress\n");
790 /* If this command was being used as part of the reset
791 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
792 * causes fail_outstanding_commands not to return the command
793 * block back to free pool
795 if (cmd == pinstance->reset_cmd)
796 cmd->cmd_done = pmcraid_ioa_reset;
799 /* Notify apps of important IOA bringup/bringdown sequences */
800 if (pinstance->scn.ioa_state != PMC_DEVICE_EVENT_RESET_START &&
801 pinstance->scn.ioa_state != PMC_DEVICE_EVENT_SHUTDOWN_START)
802 pmcraid_notify_ioastate(pinstance,
803 PMC_DEVICE_EVENT_RESET_START);
805 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
806 scsi_block_requests(pinstance->host);
807 pmcraid_reset_alert(cmd);
808 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
812 * pmcraid_internal_done - completion routine for internally generated cmds
814 * @cmd: command that got response from IOA
819 static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
821 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
822 cmd->ioa_cb->ioarcb.cdb[0],
823 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
825 /* Some of the internal commands are sent with callers blocking for the
826 * response. Same will be indicated as part of cmd->completion_req
827 * field. Response path needs to wake up any waiters waiting for cmd
828 * completion if this flag is set.
830 if (cmd->completion_req) {
831 cmd->completion_req = 0;
832 complete(&cmd->wait_for_completion);
835 /* most of the internal commands are completed by caller itself, so
836 * no need to return the command block back to free pool until we are
837 * required to do so (e.g once done with initialization).
841 pmcraid_return_cmd(cmd);
846 * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
848 * @cmd: command that got response from IOA
850 * This routine is called after driver re-reads configuration table due to a
851 * lost CCN. It returns the command block back to free pool and schedules
852 * worker thread to add/delete devices into the system.
857 static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
859 pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
860 cmd->ioa_cb->ioarcb.cdb[0],
861 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
865 pmcraid_return_cmd(cmd);
867 pmcraid_info("scheduling worker for config table reinitialization\n");
868 schedule_work(&cmd->drv_inst->worker_q);
872 * pmcraid_erp_done - Process completion of SCSI error response from device
873 * @cmd: pmcraid_command
875 * This function copies the sense buffer into the scsi_cmd struct and completes
876 * scsi_cmd by calling scsi_done function.
881 static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
883 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
884 struct pmcraid_instance *pinstance = cmd->drv_inst;
885 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
887 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
888 scsi_cmd->result |= (DID_ERROR << 16);
889 scmd_printk(KERN_INFO, scsi_cmd,
890 "command CDB[0] = %x failed with IOASC: 0x%08X\n",
891 cmd->ioa_cb->ioarcb.cdb[0], ioasc);
894 /* if we had allocated sense buffers for request sense, copy the sense
895 * release the buffers
897 if (cmd->sense_buffer != NULL) {
898 memcpy(scsi_cmd->sense_buffer,
900 SCSI_SENSE_BUFFERSIZE);
901 pci_free_consistent(pinstance->pdev,
902 SCSI_SENSE_BUFFERSIZE,
903 cmd->sense_buffer, cmd->sense_buffer_dma);
904 cmd->sense_buffer = NULL;
905 cmd->sense_buffer_dma = 0;
908 scsi_dma_unmap(scsi_cmd);
909 pmcraid_return_cmd(cmd);
910 scsi_cmd->scsi_done(scsi_cmd);
914 * pmcraid_fire_command - sends an IOA command to adapter
916 * This function adds the given block into pending command list
917 * and returns without waiting
919 * @cmd : command to be sent to the device
924 static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
926 struct pmcraid_instance *pinstance = cmd->drv_inst;
927 unsigned long lock_flags;
929 /* Add this command block to pending cmd pool. We do this prior to
930 * writting IOARCB to ioarrin because IOA might complete the command
931 * by the time we are about to add it to the list. Response handler
932 * (isr/tasklet) looks for cmd block in the pending pending list.
934 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
935 list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
936 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
937 atomic_inc(&pinstance->outstanding_cmds);
939 /* driver writes lower 32-bit value of IOARCB address only */
941 iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
946 * pmcraid_send_cmd - fires a command to IOA
948 * This function also sets up timeout function, and command completion
951 * @cmd: pointer to the command block to be fired to IOA
952 * @cmd_done: command completion function, called once IOA responds
953 * @timeout: timeout to wait for this command completion
954 * @timeout_func: timeout handler
959 static void pmcraid_send_cmd(
960 struct pmcraid_cmd *cmd,
961 void (*cmd_done) (struct pmcraid_cmd *),
962 unsigned long timeout,
963 void (*timeout_func) (struct pmcraid_cmd *)
966 /* initialize done function */
967 cmd->cmd_done = cmd_done;
970 /* setup timeout handler */
971 cmd->timer.data = (unsigned long)cmd;
972 cmd->timer.expires = jiffies + timeout;
973 cmd->timer.function = (void (*)(unsigned long))timeout_func;
974 add_timer(&cmd->timer);
977 /* fire the command to IOA */
978 _pmcraid_fire_command(cmd);
982 * pmcraid_ioa_shutdown_done - completion function for IOA shutdown command
983 * @cmd: pointer to the command block used for sending IOA shutdown command
988 static void pmcraid_ioa_shutdown_done(struct pmcraid_cmd *cmd)
990 struct pmcraid_instance *pinstance = cmd->drv_inst;
991 unsigned long lock_flags;
993 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
994 pmcraid_ioa_reset(cmd);
995 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
999 * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
1001 * @cmd: pointer to the command block used as part of reset sequence
1006 static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
1008 pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
1009 cmd->ioa_cb->ioarcb.cdb[0],
1010 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1012 /* Note that commands sent during reset require next command to be sent
1013 * to IOA. Hence reinit the done function as well as timeout function
1015 pmcraid_reinit_cmdblk(cmd);
1016 cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
1017 cmd->ioa_cb->ioarcb.resource_handle =
1018 cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1019 cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
1020 cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
1022 /* fire shutdown command to hardware. */
1023 pmcraid_info("firing normal shutdown command (%d) to IOA\n",
1024 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
1026 pmcraid_notify_ioastate(cmd->drv_inst, PMC_DEVICE_EVENT_SHUTDOWN_START);
1028 pmcraid_send_cmd(cmd, pmcraid_ioa_shutdown_done,
1029 PMCRAID_SHUTDOWN_TIMEOUT,
1030 pmcraid_timeout_handler);
1034 * pmcraid_get_fwversion_done - completion function for get_fwversion
1036 * @cmd: pointer to command block used to send INQUIRY command
1041 static void pmcraid_querycfg(struct pmcraid_cmd *);
1043 static void pmcraid_get_fwversion_done(struct pmcraid_cmd *cmd)
1045 struct pmcraid_instance *pinstance = cmd->drv_inst;
1046 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1047 unsigned long lock_flags;
1049 /* configuration table entry size depends on firmware version. If fw
1050 * version is not known, it is not possible to interpret IOA config
1054 pmcraid_err("IOA Inquiry failed with %x\n", ioasc);
1055 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1056 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1057 pmcraid_reset_alert(cmd);
1058 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1060 pmcraid_querycfg(cmd);
1065 * pmcraid_get_fwversion - reads firmware version information
1067 * @cmd: pointer to command block used to send INQUIRY command
1072 static void pmcraid_get_fwversion(struct pmcraid_cmd *cmd)
1074 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1075 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
1076 struct pmcraid_instance *pinstance = cmd->drv_inst;
1077 u16 data_size = sizeof(struct pmcraid_inquiry_data);
1079 pmcraid_reinit_cmdblk(cmd);
1080 ioarcb->request_type = REQ_TYPE_SCSI;
1081 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1082 ioarcb->cdb[0] = INQUIRY;
1084 ioarcb->cdb[2] = 0xD0;
1085 ioarcb->cdb[3] = (data_size >> 8) & 0xFF;
1086 ioarcb->cdb[4] = data_size & 0xFF;
1088 /* Since entire inquiry data it can be part of IOARCB itself
1090 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1091 offsetof(struct pmcraid_ioarcb,
1092 add_data.u.ioadl[0]));
1093 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1094 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
1096 ioarcb->request_flags0 |= NO_LINK_DESCS;
1097 ioarcb->data_transfer_length = cpu_to_le32(data_size);
1098 ioadl = &(ioarcb->add_data.u.ioadl[0]);
1099 ioadl->flags = IOADL_FLAGS_LAST_DESC;
1100 ioadl->address = cpu_to_le64(pinstance->inq_data_baddr);
1101 ioadl->data_len = cpu_to_le32(data_size);
1103 pmcraid_send_cmd(cmd, pmcraid_get_fwversion_done,
1104 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
1108 * pmcraid_identify_hrrq - registers host rrq buffers with IOA
1109 * @cmd: pointer to command block to be used for identify hrrq
1114 static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
1116 struct pmcraid_instance *pinstance = cmd->drv_inst;
1117 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1118 int index = cmd->hrrq_index;
1119 __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
1120 u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
1121 void (*done_function)(struct pmcraid_cmd *);
1123 pmcraid_reinit_cmdblk(cmd);
1124 cmd->hrrq_index = index + 1;
1126 if (cmd->hrrq_index < pinstance->num_hrrq) {
1127 done_function = pmcraid_identify_hrrq;
1129 cmd->hrrq_index = 0;
1130 done_function = pmcraid_get_fwversion;
1133 /* Initialize ioarcb */
1134 ioarcb->request_type = REQ_TYPE_IOACMD;
1135 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1137 /* initialize the hrrq number where IOA will respond to this command */
1138 ioarcb->hrrq_id = index;
1139 ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
1140 ioarcb->cdb[1] = index;
1142 /* IOA expects 64-bit pci address to be written in B.E format
1143 * (i.e cdb[2]=MSByte..cdb[9]=LSB.
1145 pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb:index => %llx:%llx:%x\n",
1146 hrrq_addr, ioarcb->ioarcb_bus_addr, index);
1148 memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
1149 memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
1151 /* Subsequent commands require HRRQ identification to be successful.
1152 * Note that this gets called even during reset from SCSI mid-layer
1155 pmcraid_send_cmd(cmd, done_function,
1156 PMCRAID_INTERNAL_TIMEOUT,
1157 pmcraid_timeout_handler);
1160 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
1161 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
1164 * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
1166 * @cmd: initialized command block pointer
1171 static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
1173 if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
1174 atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
1176 atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
1178 pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
1182 * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
1184 * @pinstance: pointer to adapter instance structure
1188 * pointer to initialized pmcraid_cmd structure or NULL
1190 static struct pmcraid_cmd *pmcraid_init_hcam
1192 struct pmcraid_instance *pinstance,
1196 struct pmcraid_cmd *cmd;
1197 struct pmcraid_ioarcb *ioarcb;
1198 struct pmcraid_ioadl_desc *ioadl;
1199 struct pmcraid_hostrcb *hcam;
1200 void (*cmd_done) (struct pmcraid_cmd *);
1204 cmd = pmcraid_get_free_cmd(pinstance);
1207 pmcraid_err("no free command blocks for hcam\n");
1211 if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
1212 rcb_size = sizeof(struct pmcraid_hcam_ccn_ext);
1213 cmd_done = pmcraid_process_ccn;
1214 dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
1215 hcam = &pinstance->ccn;
1217 rcb_size = sizeof(struct pmcraid_hcam_ldn);
1218 cmd_done = pmcraid_process_ldn;
1219 dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
1220 hcam = &pinstance->ldn;
1223 /* initialize command pointer used for HCAM registration */
1226 ioarcb = &cmd->ioa_cb->ioarcb;
1227 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
1228 offsetof(struct pmcraid_ioarcb,
1229 add_data.u.ioadl[0]));
1230 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
1231 ioadl = ioarcb->add_data.u.ioadl;
1233 /* Initialize ioarcb */
1234 ioarcb->request_type = REQ_TYPE_HCAM;
1235 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
1236 ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
1237 ioarcb->cdb[1] = type;
1238 ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
1239 ioarcb->cdb[8] = (rcb_size) & 0xFF;
1241 ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
1243 ioadl[0].flags |= IOADL_FLAGS_READ_LAST;
1244 ioadl[0].data_len = cpu_to_le32(rcb_size);
1245 ioadl[0].address = cpu_to_le32(dma);
1247 cmd->cmd_done = cmd_done;
1252 * pmcraid_send_hcam - Send an HCAM to IOA
1253 * @pinstance: ioa config struct
1256 * This function will send a Host Controlled Async command to IOA.
1261 static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
1263 struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
1264 pmcraid_send_hcam_cmd(cmd);
1269 * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
1271 * @cmd: pointer to cmd that is used as cancelling command
1272 * @cmd_to_cancel: pointer to the command that needs to be cancelled
1274 static void pmcraid_prepare_cancel_cmd(
1275 struct pmcraid_cmd *cmd,
1276 struct pmcraid_cmd *cmd_to_cancel
1279 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
1280 __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
1282 /* Get the resource handle to where the command to be aborted has been
1285 ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
1286 ioarcb->request_type = REQ_TYPE_IOACMD;
1287 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
1288 ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
1290 /* IOARCB address of the command to be cancelled is given in
1291 * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
1292 * IOARCB address are not masked.
1294 ioarcb_addr = cpu_to_be64(ioarcb_addr);
1295 memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
1299 * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
1301 * @cmd: command to be used as cancelling command
1303 * @cmd_done: op done function for the cancelling command
1305 static void pmcraid_cancel_hcam(
1306 struct pmcraid_cmd *cmd,
1308 void (*cmd_done) (struct pmcraid_cmd *)
1311 struct pmcraid_instance *pinstance;
1312 struct pmcraid_hostrcb *hcam;
1314 pinstance = cmd->drv_inst;
1315 hcam = (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
1316 &pinstance->ldn : &pinstance->ccn;
1318 /* prepare for cancelling previous hcam command. If the HCAM is
1319 * currently not pending with IOA, we would have hcam->cmd as non-null
1321 if (hcam->cmd == NULL)
1324 pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
1326 /* writing to IOARRIN must be protected by host_lock, as mid-layer
1327 * schedule queuecommand while we are doing this
1329 pmcraid_send_cmd(cmd, cmd_done,
1330 PMCRAID_INTERNAL_TIMEOUT,
1331 pmcraid_timeout_handler);
1335 * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
1337 * @cmd: command block to be used for cancelling the HCAM
1339 static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
1341 pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
1342 cmd->ioa_cb->ioarcb.cdb[0],
1343 le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
1345 pmcraid_reinit_cmdblk(cmd);
1347 pmcraid_cancel_hcam(cmd,
1348 PMCRAID_HCAM_CODE_CONFIG_CHANGE,
1349 pmcraid_ioa_shutdown);
1353 * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
1355 * @cmd: command block to be used for cancelling the HCAM
1357 static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
1359 pmcraid_cancel_hcam(cmd,
1360 PMCRAID_HCAM_CODE_LOG_DATA,
1361 pmcraid_cancel_ccn);
1365 * pmcraid_expose_resource - check if the resource can be exposed to OS
1367 * @fw_version: firmware version code
1368 * @cfgte: pointer to configuration table entry of the resource
1371 * true if resource can be added to midlayer, false(0) otherwise
1373 static int pmcraid_expose_resource(u16 fw_version,
1374 struct pmcraid_config_table_entry *cfgte)
1378 if (cfgte->resource_type == RES_TYPE_VSET) {
1379 if (fw_version <= PMCRAID_FW_VERSION_1)
1380 retval = ((cfgte->unique_flags1 & 0x80) == 0);
1382 retval = ((cfgte->unique_flags0 & 0x80) == 0 &&
1383 (cfgte->unique_flags1 & 0x80) == 0);
1385 } else if (cfgte->resource_type == RES_TYPE_GSCSI)
1386 retval = (RES_BUS(cfgte->resource_address) !=
1387 PMCRAID_VIRTUAL_ENCL_BUS_ID);
1391 /* attributes supported by pmcraid_event_family */
1393 PMCRAID_AEN_ATTR_UNSPEC,
1394 PMCRAID_AEN_ATTR_EVENT,
1395 __PMCRAID_AEN_ATTR_MAX,
1397 #define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
1399 /* commands supported by pmcraid_event_family */
1401 PMCRAID_AEN_CMD_UNSPEC,
1402 PMCRAID_AEN_CMD_EVENT,
1403 __PMCRAID_AEN_CMD_MAX,
1405 #define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
1407 static struct genl_family pmcraid_event_family = {
1408 .id = GENL_ID_GENERATE,
1411 .maxattr = PMCRAID_AEN_ATTR_MAX
1415 * pmcraid_netlink_init - registers pmcraid_event_family
1418 * 0 if the pmcraid_event_family is successfully registered
1419 * with netlink generic, non-zero otherwise
1421 static int pmcraid_netlink_init(void)
1425 result = genl_register_family(&pmcraid_event_family);
1430 pmcraid_info("registered NETLINK GENERIC group: %d\n",
1431 pmcraid_event_family.id);
1437 * pmcraid_netlink_release - unregisters pmcraid_event_family
1442 static void pmcraid_netlink_release(void)
1444 genl_unregister_family(&pmcraid_event_family);
1448 * pmcraid_notify_aen - sends event msg to user space application
1449 * @pinstance: pointer to adapter instance structure
1453 * 0 if success, error value in case of any failure.
1455 static int pmcraid_notify_aen(
1456 struct pmcraid_instance *pinstance,
1457 struct pmcraid_aen_msg *aen_msg,
1461 struct sk_buff *skb;
1463 u32 total_size, nla_genl_hdr_total_size;
1466 aen_msg->hostno = (pinstance->host->unique_id << 16 |
1467 MINOR(pinstance->cdev.dev));
1468 aen_msg->length = data_size;
1470 data_size += sizeof(*aen_msg);
1472 total_size = nla_total_size(data_size);
1473 /* Add GENL_HDR to total_size */
1474 nla_genl_hdr_total_size =
1475 (total_size + (GENL_HDRLEN +
1476 ((struct genl_family *)&pmcraid_event_family)->hdrsize)
1478 skb = genlmsg_new(nla_genl_hdr_total_size, GFP_ATOMIC);
1482 pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
1487 /* add the genetlink message header */
1488 msg_header = genlmsg_put(skb, 0, 0,
1489 &pmcraid_event_family, 0,
1490 PMCRAID_AEN_CMD_EVENT);
1492 pmcraid_err("failed to copy command details\n");
1497 result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
1500 pmcraid_err("failed to copy AEN attribute data\n");
1505 /* send genetlink multicast message to notify appplications */
1506 result = genlmsg_end(skb, msg_header);
1509 pmcraid_err("genlmsg_end failed\n");
1515 genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
1517 /* If there are no listeners, genlmsg_multicast may return non-zero
1521 pmcraid_info("error (%x) sending aen event message\n", result);
1526 * pmcraid_notify_ccn - notifies about CCN event msg to user space
1527 * @pinstance: pointer adapter instance structure
1530 * 0 if success, error value in case of any failure
1532 static int pmcraid_notify_ccn(struct pmcraid_instance *pinstance)
1534 return pmcraid_notify_aen(pinstance,
1536 pinstance->ccn.hcam->data_len +
1537 sizeof(struct pmcraid_hcam_hdr));
1541 * pmcraid_notify_ldn - notifies about CCN event msg to user space
1542 * @pinstance: pointer adapter instance structure
1545 * 0 if success, error value in case of any failure
1547 static int pmcraid_notify_ldn(struct pmcraid_instance *pinstance)
1549 return pmcraid_notify_aen(pinstance,
1551 pinstance->ldn.hcam->data_len +
1552 sizeof(struct pmcraid_hcam_hdr));
1556 * pmcraid_notify_ioastate - sends IOA state event msg to user space
1557 * @pinstance: pointer adapter instance structure
1558 * @evt: controller state event to be sent
1561 * 0 if success, error value in case of any failure
1563 static void pmcraid_notify_ioastate(struct pmcraid_instance *pinstance, u32 evt)
1565 pinstance->scn.ioa_state = evt;
1566 pmcraid_notify_aen(pinstance,
1567 &pinstance->scn.msg,
1572 * pmcraid_handle_config_change - Handle a config change from the adapter
1573 * @pinstance: pointer to per adapter instance structure
1579 static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
1581 struct pmcraid_config_table_entry *cfg_entry;
1582 struct pmcraid_hcam_ccn *ccn_hcam;
1583 struct pmcraid_cmd *cmd;
1584 struct pmcraid_cmd *cfgcmd;
1585 struct pmcraid_resource_entry *res = NULL;
1586 unsigned long lock_flags;
1587 unsigned long host_lock_flags;
1589 u32 hidden_entry = 0;
1593 ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
1594 cfg_entry = &ccn_hcam->cfg_entry;
1595 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
1597 pmcraid_info("CCN(%x): %x timestamp: %llx type: %x lost: %x flags: %x \
1598 res: %x:%x:%x:%x\n",
1599 pinstance->ccn.hcam->ilid,
1600 pinstance->ccn.hcam->op_code,
1601 ((pinstance->ccn.hcam->timestamp1) |
1602 ((pinstance->ccn.hcam->timestamp2 & 0xffffffffLL) << 32)),
1603 pinstance->ccn.hcam->notification_type,
1604 pinstance->ccn.hcam->notification_lost,
1605 pinstance->ccn.hcam->flags,
1606 pinstance->host->unique_id,
1607 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
1608 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
1609 RES_BUS(cfg_entry->resource_address)),
1610 RES_IS_VSET(*cfg_entry) ?
1611 (fw_version <= PMCRAID_FW_VERSION_1 ?
1612 cfg_entry->unique_flags1 :
1613 cfg_entry->array_id & 0xFF) :
1614 RES_TARGET(cfg_entry->resource_address),
1615 RES_LUN(cfg_entry->resource_address));
1618 /* If this HCAM indicates a lost notification, read the config table */
1619 if (pinstance->ccn.hcam->notification_lost) {
1620 cfgcmd = pmcraid_get_free_cmd(pinstance);
1622 pmcraid_info("lost CCN, reading config table\b");
1623 pinstance->reinit_cfg_table = 1;
1624 pmcraid_querycfg(cfgcmd);
1626 pmcraid_err("lost CCN, no free cmd for querycfg\n");
1628 goto out_notify_apps;
1631 /* If this resource is not going to be added to mid-layer, just notify
1632 * applications and return. If this notification is about hiding a VSET
1633 * resource, check if it was exposed already.
1635 if (pinstance->ccn.hcam->notification_type ==
1636 NOTIFICATION_TYPE_ENTRY_CHANGED &&
1637 cfg_entry->resource_type == RES_TYPE_VSET) {
1639 if (fw_version <= PMCRAID_FW_VERSION_1)
1640 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1642 hidden_entry = (cfg_entry->unique_flags1 & 0x80) != 0;
1644 } else if (!pmcraid_expose_resource(fw_version, cfg_entry)) {
1645 goto out_notify_apps;
1648 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
1649 list_for_each_entry(res, &pinstance->used_res_q, queue) {
1650 rc = memcmp(&res->cfg_entry.resource_address,
1651 &cfg_entry->resource_address,
1652 sizeof(cfg_entry->resource_address));
1662 spin_unlock_irqrestore(&pinstance->resource_lock,
1664 goto out_notify_apps;
1667 /* If there are more number of resources than what driver can
1668 * manage, do not notify the applications about the CCN. Just
1669 * ignore this notifications and re-register the same HCAM
1671 if (list_empty(&pinstance->free_res_q)) {
1672 spin_unlock_irqrestore(&pinstance->resource_lock,
1674 pmcraid_err("too many resources attached\n");
1675 spin_lock_irqsave(pinstance->host->host_lock,
1677 pmcraid_send_hcam(pinstance,
1678 PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1679 spin_unlock_irqrestore(pinstance->host->host_lock,
1684 res = list_entry(pinstance->free_res_q.next,
1685 struct pmcraid_resource_entry, queue);
1687 list_del(&res->queue);
1688 res->scsi_dev = NULL;
1689 res->reset_progress = 0;
1690 list_add_tail(&res->queue, &pinstance->used_res_q);
1693 memcpy(&res->cfg_entry, cfg_entry, pinstance->config_table_entry_size);
1695 if (pinstance->ccn.hcam->notification_type ==
1696 NOTIFICATION_TYPE_ENTRY_DELETED || hidden_entry) {
1697 if (res->scsi_dev) {
1698 if (fw_version <= PMCRAID_FW_VERSION_1)
1699 res->cfg_entry.unique_flags1 &= 0x7F;
1701 res->cfg_entry.array_id &= 0xFF;
1702 res->change_detected = RES_CHANGE_DEL;
1703 res->cfg_entry.resource_handle =
1704 PMCRAID_INVALID_RES_HANDLE;
1705 schedule_work(&pinstance->worker_q);
1707 /* This may be one of the non-exposed resources */
1708 list_move_tail(&res->queue, &pinstance->free_res_q);
1710 } else if (!res->scsi_dev) {
1711 res->change_detected = RES_CHANGE_ADD;
1712 schedule_work(&pinstance->worker_q);
1714 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
1718 /* Notify configuration changes to registered applications.*/
1719 if (!pmcraid_disable_aen)
1720 pmcraid_notify_ccn(pinstance);
1722 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1724 pmcraid_send_hcam_cmd(cmd);
1728 * pmcraid_get_error_info - return error string for an ioasc
1729 * @ioasc: ioasc code
1733 static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
1736 for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
1737 if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
1738 return &pmcraid_ioasc_error_table[i];
1744 * pmcraid_ioasc_logger - log IOASC information based user-settings
1745 * @ioasc: ioasc code
1746 * @cmd: pointer to command that resulted in 'ioasc'
1748 void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
1750 struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
1752 if (error_info == NULL ||
1753 cmd->drv_inst->current_log_level < error_info->log_level)
1756 /* log the error string */
1757 pmcraid_err("cmd [%x] for resource %x failed with %x(%s)\n",
1758 cmd->ioa_cb->ioarcb.cdb[0],
1759 cmd->ioa_cb->ioarcb.resource_handle,
1760 le32_to_cpu(ioasc), error_info->error_string);
1764 * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
1766 * @pinstance: pointer to per adapter instance structure
1771 static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
1773 struct pmcraid_hcam_ldn *hcam_ldn;
1776 hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1779 ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
1780 pinstance->ldn.hcam->ilid,
1781 pinstance->ldn.hcam->op_code,
1782 pinstance->ldn.hcam->notification_type,
1783 pinstance->ldn.hcam->notification_lost,
1784 pinstance->ldn.hcam->flags,
1785 pinstance->ldn.hcam->overlay_id);
1787 /* log only the errors, no need to log informational log entries */
1788 if (pinstance->ldn.hcam->notification_type !=
1789 NOTIFICATION_TYPE_ERROR_LOG)
1792 if (pinstance->ldn.hcam->notification_lost ==
1793 HOSTRCB_NOTIFICATIONS_LOST)
1794 dev_info(&pinstance->pdev->dev, "Error notifications lost\n");
1796 ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
1798 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
1799 ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
1800 dev_info(&pinstance->pdev->dev,
1801 "UnitAttention due to IOA Bus Reset\n");
1802 scsi_report_bus_reset(
1804 RES_BUS(hcam_ldn->error_log.fd_ra));
1811 * pmcraid_process_ccn - Op done function for a CCN.
1812 * @cmd: pointer to command struct
1814 * This function is the op done function for a configuration
1815 * change notification
1820 static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
1822 struct pmcraid_instance *pinstance = cmd->drv_inst;
1823 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1824 unsigned long lock_flags;
1826 pinstance->ccn.cmd = NULL;
1827 pmcraid_return_cmd(cmd);
1829 /* If driver initiated IOA reset happened while this hcam was pending
1830 * with IOA, or IOA bringdown sequence is in progress, no need to
1831 * re-register the hcam
1833 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1834 atomic_read(&pinstance->ccn.ignore) == 1) {
1837 dev_info(&pinstance->pdev->dev,
1838 "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
1839 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
1840 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1841 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
1843 pmcraid_handle_config_change(pinstance);
1848 * pmcraid_process_ldn - op done function for an LDN
1849 * @cmd: pointer to command block
1854 static void pmcraid_initiate_reset(struct pmcraid_instance *);
1855 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd);
1857 static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
1859 struct pmcraid_instance *pinstance = cmd->drv_inst;
1860 struct pmcraid_hcam_ldn *ldn_hcam =
1861 (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
1862 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
1863 u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
1864 unsigned long lock_flags;
1866 /* return the command block back to freepool */
1867 pinstance->ldn.cmd = NULL;
1868 pmcraid_return_cmd(cmd);
1870 /* If driver initiated IOA reset happened while this hcam was pending
1871 * with IOA, no need to re-register the hcam as reset engine will do it
1872 * once reset sequence is complete
1874 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
1875 atomic_read(&pinstance->ccn.ignore) == 1) {
1877 } else if (!ioasc) {
1878 pmcraid_handle_error_log(pinstance);
1879 if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
1880 spin_lock_irqsave(pinstance->host->host_lock,
1882 pmcraid_initiate_reset(pinstance);
1883 spin_unlock_irqrestore(pinstance->host->host_lock,
1887 if (fd_ioasc == PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC) {
1888 pinstance->timestamp_error = 1;
1889 pmcraid_set_timestamp(cmd);
1892 dev_info(&pinstance->pdev->dev,
1893 "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
1895 /* send netlink message for HCAM notification if enabled */
1896 if (!pmcraid_disable_aen)
1897 pmcraid_notify_ldn(pinstance);
1899 cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1901 pmcraid_send_hcam_cmd(cmd);
1905 * pmcraid_register_hcams - register HCAMs for CCN and LDN
1907 * @pinstance: pointer per adapter instance structure
1912 static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
1914 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
1915 pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
1919 * pmcraid_unregister_hcams - cancel HCAMs registered already
1920 * @cmd: pointer to command used as part of reset sequence
1922 static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
1924 struct pmcraid_instance *pinstance = cmd->drv_inst;
1926 /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
1927 * handling hcam response though it is not necessary. In order to
1928 * prevent this, set 'ignore', so that bring-down sequence doesn't
1929 * re-send any more hcams
1931 atomic_set(&pinstance->ccn.ignore, 1);
1932 atomic_set(&pinstance->ldn.ignore, 1);
1934 /* If adapter reset was forced as part of runtime reset sequence,
1935 * start the reset sequence. Reset will be triggered even in case
1938 if ((pinstance->force_ioa_reset && !pinstance->ioa_bringdown) ||
1939 pinstance->ioa_unit_check) {
1940 pinstance->force_ioa_reset = 0;
1941 pinstance->ioa_unit_check = 0;
1942 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
1943 pmcraid_reset_alert(cmd);
1947 /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
1948 * one after the other. So CCN cancellation will be triggered by
1949 * pmcraid_cancel_ldn itself.
1951 pmcraid_cancel_ldn(cmd);
1955 * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
1956 * @pinstance: pointer to adapter instance structure
1958 * 1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
1960 static void pmcraid_reinit_buffers(struct pmcraid_instance *);
1962 static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
1966 pmcraid_reinit_buffers(pinstance);
1967 intrs = pmcraid_read_interrupts(pinstance);
1969 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
1971 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
1972 if (!pinstance->interrupt_mode) {
1973 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1974 pinstance->int_regs.
1975 ioa_host_interrupt_mask_reg);
1976 iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
1977 pinstance->int_regs.ioa_host_interrupt_clr_reg);
1986 * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
1987 * @cmd : pointer to reset command block
1992 static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
1994 struct pmcraid_instance *pinstance = cmd->drv_inst;
1998 /* There will be an interrupt when Transition to Operational bit is
1999 * set so tasklet would execute next reset task. The timeout handler
2000 * would re-initiate a reset
2002 cmd->cmd_done = pmcraid_ioa_reset;
2003 cmd->timer.data = (unsigned long)cmd;
2004 cmd->timer.expires = jiffies +
2005 msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
2006 cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
2008 if (!timer_pending(&cmd->timer))
2009 add_timer(&cmd->timer);
2011 /* Enable destructive diagnostics on IOA if it is not yet in
2014 doorbell = DOORBELL_RUNTIME_RESET |
2015 DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
2017 /* Since we do RESET_ALERT and Start BIST we have to again write
2018 * MSIX Doorbell to indicate the interrupt mode
2020 if (pinstance->interrupt_mode) {
2021 iowrite32(DOORBELL_INTR_MODE_MSIX,
2022 pinstance->int_regs.host_ioa_interrupt_reg);
2023 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
2026 iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
2027 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2028 int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
2030 pmcraid_info("Waiting for IOA to become operational %x:%x\n",
2031 ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
2036 * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
2038 * @pinstance: pointer to adapter instance structure
2043 static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
2045 pmcraid_info("%s is not yet implemented\n", __func__);
2049 * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
2050 * @pinstance: pointer to adapter instance structure
2052 * This function fails all outstanding ops. If they are submitted to IOA
2053 * already, it sends cancel all messages if IOA is still accepting IOARCBs,
2054 * otherwise just completes the commands and returns the cmd blocks to free
2060 static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
2062 struct pmcraid_cmd *cmd, *temp;
2063 unsigned long lock_flags;
2065 /* pending command list is protected by pending_pool_lock. Its
2066 * traversal must be done as within this lock
2068 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2069 list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
2071 list_del(&cmd->free_list);
2072 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
2074 cmd->ioa_cb->ioasa.ioasc =
2075 cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
2076 cmd->ioa_cb->ioasa.ilid =
2077 cpu_to_be32(PMCRAID_DRIVER_ILID);
2079 /* In case the command timer is still running */
2080 del_timer(&cmd->timer);
2082 /* If this is an IO command, complete it by invoking scsi_done
2083 * function. If this is one of the internal commands other
2084 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
2087 if (cmd->scsi_cmd) {
2089 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2090 __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
2092 scsi_cmd->result |= DID_ERROR << 16;
2094 scsi_dma_unmap(scsi_cmd);
2095 pmcraid_return_cmd(cmd);
2097 pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
2098 le32_to_cpu(resp) >> 2,
2099 cmd->ioa_cb->ioarcb.cdb[0],
2101 scsi_cmd->scsi_done(scsi_cmd);
2102 } else if (cmd->cmd_done == pmcraid_internal_done ||
2103 cmd->cmd_done == pmcraid_erp_done) {
2105 } else if (cmd->cmd_done != pmcraid_ioa_reset &&
2106 cmd->cmd_done != pmcraid_ioa_shutdown_done) {
2107 pmcraid_return_cmd(cmd);
2110 atomic_dec(&pinstance->outstanding_cmds);
2111 spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
2114 spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
2118 * pmcraid_ioa_reset - Implementation of IOA reset logic
2120 * @cmd: pointer to the cmd block to be used for entire reset process
2122 * This function executes most of the steps required for IOA reset. This gets
2123 * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
2124 * 'eh_' thread. Access to variables used for controling the reset sequence is
2125 * synchronized using host lock. Various functions called during reset process
2126 * would make use of a single command block, pointer to which is also stored in
2127 * adapter instance structure.
2132 static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
2134 struct pmcraid_instance *pinstance = cmd->drv_inst;
2135 u8 reset_complete = 0;
2137 pinstance->ioa_reset_in_progress = 1;
2139 if (pinstance->reset_cmd != cmd) {
2140 pmcraid_err("reset is called with different command block\n");
2141 pinstance->reset_cmd = cmd;
2144 pmcraid_info("reset_engine: state = %d, command = %p\n",
2145 pinstance->ioa_state, cmd);
2147 switch (pinstance->ioa_state) {
2149 case IOA_STATE_DEAD:
2150 /* If IOA is offline, whatever may be the reset reason, just
2151 * return. callers might be waiting on the reset wait_q, wake
2154 pmcraid_err("IOA is offline no reset is possible\n");
2158 case IOA_STATE_IN_BRINGDOWN:
2159 /* we enter here, once ioa shutdown command is processed by IOA
2160 * Alert IOA for a possible reset. If reset alert fails, IOA
2161 * goes through hard-reset
2163 pmcraid_disable_interrupts(pinstance, ~0);
2164 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2165 pmcraid_reset_alert(cmd);
2168 case IOA_STATE_UNKNOWN:
2169 /* We may be called during probe or resume. Some pre-processing
2170 * is required for prior to reset
2172 scsi_block_requests(pinstance->host);
2174 /* If asked to reset while IOA was processing responses or
2175 * there are any error responses then IOA may require
2178 if (pinstance->ioa_hard_reset == 0) {
2179 if (ioread32(pinstance->ioa_status) &
2180 INTRS_TRANSITION_TO_OPERATIONAL) {
2181 pmcraid_info("sticky bit set, bring-up\n");
2182 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2183 pmcraid_reinit_cmdblk(cmd);
2184 pmcraid_identify_hrrq(cmd);
2186 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2187 pmcraid_soft_reset(cmd);
2190 /* Alert IOA of a possible reset and wait for critical
2191 * operation in progress bit to reset
2193 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2194 pmcraid_reset_alert(cmd);
2198 case IOA_STATE_IN_RESET_ALERT:
2199 /* If critical operation in progress bit is reset or wait gets
2200 * timed out, reset proceeds with starting BIST on the IOA.
2201 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
2202 * they are 3 or more, reset engine marks IOA dead and returns
2204 pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
2205 pmcraid_start_bist(cmd);
2208 case IOA_STATE_IN_HARD_RESET:
2209 pinstance->ioa_reset_attempts++;
2211 /* retry reset if we haven't reached maximum allowed limit */
2212 if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
2213 pinstance->ioa_reset_attempts = 0;
2214 pmcraid_err("IOA didn't respond marking it as dead\n");
2215 pinstance->ioa_state = IOA_STATE_DEAD;
2217 if (pinstance->ioa_bringdown)
2218 pmcraid_notify_ioastate(pinstance,
2219 PMC_DEVICE_EVENT_SHUTDOWN_FAILED);
2221 pmcraid_notify_ioastate(pinstance,
2222 PMC_DEVICE_EVENT_RESET_FAILED);
2227 /* Once either bist or pci reset is done, restore PCI config
2228 * space. If this fails, proceed with hard reset again
2230 if (pci_restore_state(pinstance->pdev)) {
2231 pmcraid_info("config-space error resetting again\n");
2232 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2233 pmcraid_reset_alert(cmd);
2237 /* fail all pending commands */
2238 pmcraid_fail_outstanding_cmds(pinstance);
2240 /* check if unit check is active, if so extract dump */
2241 if (pinstance->ioa_unit_check) {
2242 pmcraid_info("unit check is active\n");
2243 pinstance->ioa_unit_check = 0;
2244 pmcraid_get_dump(pinstance);
2245 pinstance->ioa_reset_attempts--;
2246 pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
2247 pmcraid_reset_alert(cmd);
2251 /* if the reset reason is to bring-down the ioa, we might be
2252 * done with the reset restore pci_config_space and complete
2255 if (pinstance->ioa_bringdown) {
2256 pmcraid_info("bringing down the adapter\n");
2257 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2258 pinstance->ioa_bringdown = 0;
2259 pinstance->ioa_state = IOA_STATE_UNKNOWN;
2260 pmcraid_notify_ioastate(pinstance,
2261 PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS);
2264 /* bring-up IOA, so proceed with soft reset
2265 * Reinitialize hrrq_buffers and their indices also
2266 * enable interrupts after a pci_restore_state
2268 if (pmcraid_reset_enable_ioa(pinstance)) {
2269 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2270 pmcraid_info("bringing up the adapter\n");
2271 pmcraid_reinit_cmdblk(cmd);
2272 pmcraid_identify_hrrq(cmd);
2274 pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
2275 pmcraid_soft_reset(cmd);
2280 case IOA_STATE_IN_SOFT_RESET:
2281 /* TRANSITION TO OPERATIONAL is on so start initialization
2284 pmcraid_info("In softreset proceeding with bring-up\n");
2285 pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
2287 /* Initialization commands start with HRRQ identification. From
2288 * now on tasklet completes most of the commands as IOA is up
2289 * and intrs are enabled
2291 pmcraid_identify_hrrq(cmd);
2294 case IOA_STATE_IN_BRINGUP:
2295 /* we are done with bringing up of IOA, change the ioa_state to
2296 * operational and wake up any waiters
2298 pinstance->ioa_state = IOA_STATE_OPERATIONAL;
2302 case IOA_STATE_OPERATIONAL:
2304 /* When IOA is operational and a reset is requested, check for
2305 * the reset reason. If reset is to bring down IOA, unregister
2306 * HCAMs and initiate shutdown; if adapter reset is forced then
2307 * restart reset sequence again
2309 if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
2310 pinstance->force_ioa_reset == 0) {
2311 pmcraid_notify_ioastate(pinstance,
2312 PMC_DEVICE_EVENT_RESET_SUCCESS);
2315 if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
2316 pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
2317 pmcraid_reinit_cmdblk(cmd);
2318 pmcraid_unregister_hcams(cmd);
2323 /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
2324 * OPERATIONAL. Reset all control variables used during reset, wake up
2325 * any waiting threads and let the SCSI mid-layer send commands. Note
2326 * that host_lock must be held before invoking scsi_report_bus_reset.
2328 if (reset_complete) {
2329 pinstance->ioa_reset_in_progress = 0;
2330 pinstance->ioa_reset_attempts = 0;
2331 pinstance->reset_cmd = NULL;
2332 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2333 pinstance->ioa_bringdown = 0;
2334 pmcraid_return_cmd(cmd);
2336 /* If target state is to bring up the adapter, proceed with
2337 * hcam registration and resource exposure to mid-layer.
2339 if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
2340 pmcraid_register_hcams(pinstance);
2342 wake_up_all(&pinstance->reset_wait_q);
2349 * pmcraid_initiate_reset - initiates reset sequence. This is called from
2350 * ISR/tasklet during error interrupts including IOA unit check. If reset
2351 * is already in progress, it just returns, otherwise initiates IOA reset
2352 * to bring IOA up to operational state.
2354 * @pinstance: pointer to adapter instance structure
2359 static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
2361 struct pmcraid_cmd *cmd;
2363 /* If the reset is already in progress, just return, otherwise start
2364 * reset sequence and return
2366 if (!pinstance->ioa_reset_in_progress) {
2367 scsi_block_requests(pinstance->host);
2368 cmd = pmcraid_get_free_cmd(pinstance);
2371 pmcraid_err("no cmnd blocks for initiate_reset\n");
2375 pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
2376 pinstance->reset_cmd = cmd;
2377 pinstance->force_ioa_reset = 1;
2378 pmcraid_notify_ioastate(pinstance,
2379 PMC_DEVICE_EVENT_RESET_START);
2380 pmcraid_ioa_reset(cmd);
2385 * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
2387 * @pinstance: pointer adapter instance structure
2388 * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
2389 * @target_state: expected target state after reset
2391 * Note: This command initiates reset and waits for its completion. Hence this
2392 * should not be called from isr/timer/tasklet functions (timeout handlers,
2393 * error response handlers and interrupt handlers).
2396 * 1 in case ioa_state is not target_state, 0 otherwise.
2398 static int pmcraid_reset_reload(
2399 struct pmcraid_instance *pinstance,
2404 struct pmcraid_cmd *reset_cmd = NULL;
2405 unsigned long lock_flags;
2408 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2410 if (pinstance->ioa_reset_in_progress) {
2411 pmcraid_info("reset_reload: reset is already in progress\n");
2413 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2415 wait_event(pinstance->reset_wait_q,
2416 !pinstance->ioa_reset_in_progress);
2418 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2420 if (pinstance->ioa_state == IOA_STATE_DEAD) {
2421 spin_unlock_irqrestore(pinstance->host->host_lock,
2423 pmcraid_info("reset_reload: IOA is dead\n");
2425 } else if (pinstance->ioa_state == target_state) {
2431 pmcraid_info("reset_reload: proceeding with reset\n");
2432 scsi_block_requests(pinstance->host);
2433 reset_cmd = pmcraid_get_free_cmd(pinstance);
2435 if (reset_cmd == NULL) {
2436 pmcraid_err("no free cmnd for reset_reload\n");
2437 spin_unlock_irqrestore(pinstance->host->host_lock,
2442 if (shutdown_type == SHUTDOWN_NORMAL)
2443 pinstance->ioa_bringdown = 1;
2445 pinstance->ioa_shutdown_type = shutdown_type;
2446 pinstance->reset_cmd = reset_cmd;
2447 pinstance->force_ioa_reset = reset;
2448 pmcraid_info("reset_reload: initiating reset\n");
2449 pmcraid_ioa_reset(reset_cmd);
2450 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2451 pmcraid_info("reset_reload: waiting for reset to complete\n");
2452 wait_event(pinstance->reset_wait_q,
2453 !pinstance->ioa_reset_in_progress);
2455 pmcraid_info("reset_reload: reset is complete !!\n");
2456 scsi_unblock_requests(pinstance->host);
2457 if (pinstance->ioa_state == target_state)
2465 * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
2467 * @pinstance: pointer to adapter instance structure
2470 * whatever is returned from pmcraid_reset_reload
2472 static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
2474 return pmcraid_reset_reload(pinstance,
2480 * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
2482 * @pinstance: pointer to adapter instance structure
2485 * whatever is returned from pmcraid_reset_reload
2487 static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
2489 pmcraid_notify_ioastate(pinstance, PMC_DEVICE_EVENT_RESET_START);
2491 return pmcraid_reset_reload(pinstance,
2493 IOA_STATE_OPERATIONAL);
2497 * pmcraid_request_sense - Send request sense to a device
2498 * @cmd: pmcraid command struct
2500 * This function sends a request sense to a device as a result of a check
2501 * condition. This method re-uses the same command block that failed earlier.
2503 static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
2505 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2506 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
2508 /* allocate DMAable memory for sense buffers */
2509 cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
2510 SCSI_SENSE_BUFFERSIZE,
2511 &cmd->sense_buffer_dma);
2513 if (cmd->sense_buffer == NULL) {
2515 ("couldn't allocate sense buffer for request sense\n");
2516 pmcraid_erp_done(cmd);
2520 /* re-use the command block */
2521 memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
2522 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2523 ioarcb->request_flags0 = (SYNC_COMPLETE |
2526 ioarcb->request_type = REQ_TYPE_SCSI;
2527 ioarcb->cdb[0] = REQUEST_SENSE;
2528 ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2530 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
2531 offsetof(struct pmcraid_ioarcb,
2532 add_data.u.ioadl[0]));
2533 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
2535 ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2537 ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
2538 ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
2539 ioadl->flags = IOADL_FLAGS_LAST_DESC;
2541 /* request sense might be called as part of error response processing
2542 * which runs in tasklets context. It is possible that mid-layer might
2543 * schedule queuecommand during this time, hence, writting to IOARRIN
2544 * must be protect by host_lock
2546 pmcraid_send_cmd(cmd, pmcraid_erp_done,
2547 PMCRAID_REQUEST_SENSE_TIMEOUT,
2548 pmcraid_timeout_handler);
2552 * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
2553 * @cmd: command that failed
2554 * @sense: true if request_sense is required after cancel all
2556 * This function sends a cancel all to a device to clear the queue.
2558 static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
2560 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2561 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
2562 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2563 void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
2564 : pmcraid_request_sense;
2566 memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
2567 ioarcb->request_flags0 = SYNC_OVERRIDE;
2568 ioarcb->request_type = REQ_TYPE_IOACMD;
2569 ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
2571 if (RES_IS_GSCSI(res->cfg_entry))
2572 ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
2574 ioarcb->ioadl_bus_addr = 0;
2575 ioarcb->ioadl_length = 0;
2576 ioarcb->data_transfer_length = 0;
2577 ioarcb->ioarcb_bus_addr &= (~0x1FULL);
2579 /* writing to IOARRIN must be protected by host_lock, as mid-layer
2580 * schedule queuecommand while we are doing this
2582 pmcraid_send_cmd(cmd, cmd_done,
2583 PMCRAID_REQUEST_SENSE_TIMEOUT,
2584 pmcraid_timeout_handler);
2588 * pmcraid_frame_auto_sense: frame fixed format sense information
2590 * @cmd: pointer to failing command block
2595 static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
2597 u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
2598 struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
2599 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2600 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2601 u32 failing_lba = 0;
2603 memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
2604 cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
2606 if (RES_IS_VSET(res->cfg_entry) &&
2607 ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
2608 ioasa->u.vset.failing_lba_hi != 0) {
2610 sense_buf[0] = 0x72;
2611 sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2612 sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2613 sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2617 sense_buf[9] = 0x0A;
2618 sense_buf[10] = 0x80;
2620 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
2622 sense_buf[12] = (failing_lba & 0xff000000) >> 24;
2623 sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
2624 sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
2625 sense_buf[15] = failing_lba & 0x000000ff;
2627 failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
2629 sense_buf[16] = (failing_lba & 0xff000000) >> 24;
2630 sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
2631 sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
2632 sense_buf[19] = failing_lba & 0x000000ff;
2634 sense_buf[0] = 0x70;
2635 sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
2636 sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
2637 sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
2639 if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
2640 if (RES_IS_VSET(res->cfg_entry))
2642 le32_to_cpu(ioasa->u.
2643 vset.failing_lba_lo);
2644 sense_buf[0] |= 0x80;
2645 sense_buf[3] = (failing_lba >> 24) & 0xff;
2646 sense_buf[4] = (failing_lba >> 16) & 0xff;
2647 sense_buf[5] = (failing_lba >> 8) & 0xff;
2648 sense_buf[6] = failing_lba & 0xff;
2651 sense_buf[7] = 6; /* additional length */
2656 * pmcraid_error_handler - Error response handlers for a SCSI op
2657 * @cmd: pointer to pmcraid_cmd that has failed
2659 * This function determines whether or not to initiate ERP on the affected
2660 * device. This is called from a tasklet, which doesn't hold any locks.
2663 * 0 it caller can complete the request, otherwise 1 where in error
2664 * handler itself completes the request and returns the command block
2667 static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
2669 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2670 struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
2671 struct pmcraid_instance *pinstance = cmd->drv_inst;
2672 struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
2673 u32 ioasc = le32_to_cpu(ioasa->ioasc);
2674 u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
2675 u32 sense_copied = 0;
2678 pmcraid_info("resource pointer is NULL\n");
2682 /* If this was a SCSI read/write command keep count of errors */
2683 if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
2684 atomic_inc(&res->read_failures);
2685 else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
2686 atomic_inc(&res->write_failures);
2688 if (!RES_IS_GSCSI(res->cfg_entry) &&
2689 masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
2690 pmcraid_frame_auto_sense(cmd);
2693 /* Log IOASC/IOASA information based on user settings */
2694 pmcraid_ioasc_logger(ioasc, cmd);
2696 switch (masked_ioasc) {
2698 case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
2699 scsi_cmd->result |= (DID_ABORT << 16);
2702 case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
2703 case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
2704 scsi_cmd->result |= (DID_NO_CONNECT << 16);
2707 case PMCRAID_IOASC_NR_SYNC_REQUIRED:
2709 scsi_cmd->result |= (DID_IMM_RETRY << 16);
2712 case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
2713 scsi_cmd->result |= (DID_PASSTHROUGH << 16);
2716 case PMCRAID_IOASC_UA_BUS_WAS_RESET:
2717 case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
2718 if (!res->reset_progress)
2719 scsi_report_bus_reset(pinstance->host,
2720 scsi_cmd->device->channel);
2721 scsi_cmd->result |= (DID_ERROR << 16);
2724 case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
2725 scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
2728 /* if check_condition is not active return with error otherwise
2729 * get/frame the sense buffer
2731 if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
2732 SAM_STAT_CHECK_CONDITION &&
2733 PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
2736 /* If we have auto sense data as part of IOASA pass it to
2739 if (ioasa->auto_sense_length != 0) {
2740 short sense_len = ioasa->auto_sense_length;
2741 int data_size = min_t(u16, le16_to_cpu(sense_len),
2742 SCSI_SENSE_BUFFERSIZE);
2744 memcpy(scsi_cmd->sense_buffer,
2750 if (RES_IS_GSCSI(res->cfg_entry))
2751 pmcraid_cancel_all(cmd, sense_copied);
2752 else if (sense_copied)
2753 pmcraid_erp_done(cmd);
2755 pmcraid_request_sense(cmd);
2759 case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
2763 if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
2764 scsi_cmd->result |= (DID_ERROR << 16);
2771 * pmcraid_reset_device - device reset handler functions
2773 * @scsi_cmd: scsi command struct
2774 * @modifier: reset modifier indicating the reset sequence to be performed
2776 * This function issues a device reset to the affected device.
2777 * A LUN reset will be sent to the device first. If that does
2778 * not work, a target reset will be sent.
2783 static int pmcraid_reset_device(
2784 struct scsi_cmnd *scsi_cmd,
2785 unsigned long timeout,
2789 struct pmcraid_cmd *cmd;
2790 struct pmcraid_instance *pinstance;
2791 struct pmcraid_resource_entry *res;
2792 struct pmcraid_ioarcb *ioarcb;
2793 unsigned long lock_flags;
2797 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
2798 res = scsi_cmd->device->hostdata;
2801 sdev_printk(KERN_ERR, scsi_cmd->device,
2802 "reset_device: NULL resource pointer\n");
2806 /* If adapter is currently going through reset/reload, return failed.
2807 * This will force the mid-layer to call _eh_bus/host reset, which
2808 * will then go to sleep and wait for the reset to complete
2810 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
2811 if (pinstance->ioa_reset_in_progress ||
2812 pinstance->ioa_state == IOA_STATE_DEAD) {
2813 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2817 res->reset_progress = 1;
2818 pmcraid_info("Resetting %s resource with addr %x\n",
2819 ((modifier & RESET_DEVICE_LUN) ? "LUN" :
2820 ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
2821 le32_to_cpu(res->cfg_entry.resource_address));
2823 /* get a free cmd block */
2824 cmd = pmcraid_get_free_cmd(pinstance);
2827 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2828 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2832 ioarcb = &cmd->ioa_cb->ioarcb;
2833 ioarcb->resource_handle = res->cfg_entry.resource_handle;
2834 ioarcb->request_type = REQ_TYPE_IOACMD;
2835 ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
2837 /* Initialize reset modifier bits */
2839 modifier = ENABLE_RESET_MODIFIER | modifier;
2841 ioarcb->cdb[1] = modifier;
2843 init_completion(&cmd->wait_for_completion);
2844 cmd->completion_req = 1;
2846 pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
2847 cmd->ioa_cb->ioarcb.cdb[0],
2848 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
2849 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
2851 pmcraid_send_cmd(cmd,
2852 pmcraid_internal_done,
2854 pmcraid_timeout_handler);
2856 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
2858 /* RESET_DEVICE command completes after all pending IOARCBs are
2859 * completed. Once this command is completed, pmcraind_internal_done
2860 * will wake up the 'completion' queue.
2862 wait_for_completion(&cmd->wait_for_completion);
2864 /* complete the command here itself and return the command block
2867 pmcraid_return_cmd(cmd);
2868 res->reset_progress = 0;
2869 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2871 /* set the return value based on the returned ioasc */
2872 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
2876 * _pmcraid_io_done - helper for pmcraid_io_done function
2878 * @cmd: pointer to pmcraid command struct
2879 * @reslen: residual data length to be set in the ioasa
2880 * @ioasc: ioasc either returned by IOA or set by driver itself.
2882 * This function is invoked by pmcraid_io_done to complete mid-layer
2886 * 0 if caller is required to return it to free_pool. Returns 1 if
2887 * caller need not worry about freeing command block as error handler
2888 * will take care of that.
2891 static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
2893 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
2896 scsi_set_resid(scsi_cmd, reslen);
2898 pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
2899 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
2900 cmd->ioa_cb->ioarcb.cdb[0],
2901 ioasc, scsi_cmd->result);
2903 if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
2904 rc = pmcraid_error_handler(cmd);
2907 scsi_dma_unmap(scsi_cmd);
2908 scsi_cmd->scsi_done(scsi_cmd);
2915 * pmcraid_io_done - SCSI completion function
2917 * @cmd: pointer to pmcraid command struct
2919 * This function is invoked by tasklet/mid-layer error handler to completing
2920 * the SCSI ops sent from mid-layer.
2926 static void pmcraid_io_done(struct pmcraid_cmd *cmd)
2928 u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
2929 u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
2931 if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
2932 pmcraid_return_cmd(cmd);
2936 * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
2938 * @cmd: command block of the command to be aborted
2941 * returns pointer to command structure used as cancelling cmd
2943 static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
2945 struct pmcraid_cmd *cancel_cmd;
2946 struct pmcraid_instance *pinstance;
2947 struct pmcraid_resource_entry *res;
2949 pinstance = (struct pmcraid_instance *)cmd->drv_inst;
2950 res = cmd->scsi_cmd->device->hostdata;
2952 cancel_cmd = pmcraid_get_free_cmd(pinstance);
2954 if (cancel_cmd == NULL) {
2955 pmcraid_err("%s: no cmd blocks are available\n", __func__);
2959 pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
2961 pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
2962 cmd->ioa_cb->ioarcb.cdb[0],
2963 cmd->ioa_cb->ioarcb.response_handle >> 2);
2965 init_completion(&cancel_cmd->wait_for_completion);
2966 cancel_cmd->completion_req = 1;
2968 pmcraid_info("command (%d) CDB[0] = %x for %x\n",
2969 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
2970 cancel_cmd->ioa_cb->ioarcb.cdb[0],
2971 le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
2973 pmcraid_send_cmd(cancel_cmd,
2974 pmcraid_internal_done,
2975 PMCRAID_INTERNAL_TIMEOUT,
2976 pmcraid_timeout_handler);
2981 * pmcraid_abort_complete - Waits for ABORT TASK completion
2983 * @cancel_cmd: command block use as cancelling command
2986 * returns SUCCESS if ABORT TASK has good completion
2989 static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
2991 struct pmcraid_resource_entry *res;
2994 wait_for_completion(&cancel_cmd->wait_for_completion);
2995 res = cancel_cmd->res;
2996 cancel_cmd->res = NULL;
2997 ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
2999 /* If the abort task is not timed out we will get a Good completion
3000 * as sense_key, otherwise we may get one the following responses
3001 * due to subsquent bus reset or device reset. In case IOASC is
3002 * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
3004 if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
3005 ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
3006 if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
3011 /* complete the command here itself */
3012 pmcraid_return_cmd(cancel_cmd);
3013 return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
3017 * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
3019 * @scsi_cmd: scsi command struct given by mid-layer. When this is called
3020 * mid-layer ensures that no other commands are queued. This
3021 * never gets called under interrupt, but a separate eh thread.
3026 static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
3028 struct pmcraid_instance *pinstance;
3029 struct pmcraid_cmd *cmd;
3030 struct pmcraid_resource_entry *res;
3031 unsigned long host_lock_flags;
3032 unsigned long pending_lock_flags;
3033 struct pmcraid_cmd *cancel_cmd = NULL;
3038 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3040 scmd_printk(KERN_INFO, scsi_cmd,
3041 "I/O command timed out, aborting it.\n");
3043 res = scsi_cmd->device->hostdata;
3048 /* If we are currently going through reset/reload, return failed.
3049 * This will force the mid-layer to eventually call
3050 * pmcraid_eh_host_reset which will then go to sleep and wait for the
3053 spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
3055 if (pinstance->ioa_reset_in_progress ||
3056 pinstance->ioa_state == IOA_STATE_DEAD) {
3057 spin_unlock_irqrestore(pinstance->host->host_lock,
3062 /* loop over pending cmd list to find cmd corresponding to this
3063 * scsi_cmd. Note that this command might not have been completed
3064 * already. locking: all pending commands are protected with
3065 * pending_pool_lock.
3067 spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
3068 list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
3070 if (cmd->scsi_cmd == scsi_cmd) {
3076 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
3077 pending_lock_flags);
3079 /* If the command to be aborted was given to IOA and still pending with
3080 * it, send ABORT_TASK to abort this and wait for its completion
3083 cancel_cmd = pmcraid_abort_cmd(cmd);
3085 spin_unlock_irqrestore(pinstance->host->host_lock,
3089 cancel_cmd->res = cmd->scsi_cmd->device->hostdata;
3090 rc = pmcraid_abort_complete(cancel_cmd);
3093 return cmd_found ? rc : SUCCESS;
3097 * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
3099 * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
3101 * All these routines invokve pmcraid_reset_device with appropriate parameters.
3102 * Since these are called from mid-layer EH thread, no other IO will be queued
3103 * to the resource being reset. However, control path (IOCTL) may be active so
3104 * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
3105 * takes care by locking/unlocking host_lock.
3110 static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
3112 scmd_printk(KERN_INFO, scmd,
3113 "resetting device due to an I/O command timeout.\n");
3114 return pmcraid_reset_device(scmd,
3115 PMCRAID_INTERNAL_TIMEOUT,
3119 static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
3121 scmd_printk(KERN_INFO, scmd,
3122 "Doing bus reset due to an I/O command timeout.\n");
3123 return pmcraid_reset_device(scmd,
3124 PMCRAID_RESET_BUS_TIMEOUT,
3128 static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
3130 scmd_printk(KERN_INFO, scmd,
3131 "Doing target reset due to an I/O command timeout.\n");
3132 return pmcraid_reset_device(scmd,
3133 PMCRAID_INTERNAL_TIMEOUT,
3134 RESET_DEVICE_TARGET);
3138 * pmcraid_eh_host_reset_handler - adapter reset handler callback
3140 * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
3142 * Initiates adapter reset to bring it up to operational state
3147 static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
3149 unsigned long interval = 10000; /* 10 seconds interval */
3150 int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
3151 struct pmcraid_instance *pinstance =
3152 (struct pmcraid_instance *)(scmd->device->host->hostdata);
3155 /* wait for an additional 150 seconds just in case firmware could come
3156 * up and if it could complete all the pending commands excluding the
3157 * two HCAM (CCN and LDN).
3160 if (atomic_read(&pinstance->outstanding_cmds) <=
3161 PMCRAID_MAX_HCAM_CMD)
3166 dev_err(&pinstance->pdev->dev,
3167 "Adapter being reset due to an I/O command timeout.\n");
3168 return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
3172 * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
3173 * @scsi_cmd: scsi command struct
3176 * number of tags or 0 if the task is not tagged
3178 static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
3183 if (scsi_populate_tag_msg(scsi_cmd, tag)) {
3185 case MSG_SIMPLE_TAG:
3186 rc = TASK_TAG_SIMPLE;
3189 rc = TASK_TAG_QUEUE_HEAD;
3191 case MSG_ORDERED_TAG:
3192 rc = TASK_TAG_ORDERED;
3202 * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
3203 * @cmd: pmcraid command struct
3204 * @sgcount: count of scatter-gather elements
3207 * returns pointer pmcraid_ioadl_desc, initialized to point to internal
3208 * or external IOADLs
3210 struct pmcraid_ioadl_desc *
3211 pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
3213 struct pmcraid_ioadl_desc *ioadl;
3214 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3215 int ioadl_count = 0;
3217 if (ioarcb->add_cmd_param_length)
3218 ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
3219 ioarcb->ioadl_length =
3220 sizeof(struct pmcraid_ioadl_desc) * sgcount;
3222 if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
3223 /* external ioadls start at offset 0x80 from control_block
3224 * structure, re-using 24 out of 27 ioadls part of IOARCB.
3225 * It is necessary to indicate to firmware that driver is
3226 * using ioadls to be treated as external to IOARCB.
3228 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
3229 ioarcb->ioadl_bus_addr =
3230 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3231 offsetof(struct pmcraid_ioarcb,
3232 add_data.u.ioadl[3]));
3233 ioadl = &ioarcb->add_data.u.ioadl[3];
3235 ioarcb->ioadl_bus_addr =
3236 cpu_to_le64((cmd->ioa_cb_bus_addr) +
3237 offsetof(struct pmcraid_ioarcb,
3238 add_data.u.ioadl[ioadl_count]));
3240 ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
3241 ioarcb->ioarcb_bus_addr |=
3242 DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
3249 * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
3250 * @pinstance: pointer to adapter instance structure
3251 * @cmd: pmcraid command struct
3253 * This function is invoked by queuecommand entry point while sending a command
3254 * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
3257 * 0 on success or -1 on failure
3259 static int pmcraid_build_ioadl(
3260 struct pmcraid_instance *pinstance,
3261 struct pmcraid_cmd *cmd
3265 struct scatterlist *sglist;
3267 struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
3268 struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
3269 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
3271 u32 length = scsi_bufflen(scsi_cmd);
3276 nseg = scsi_dma_map(scsi_cmd);
3279 scmd_printk(KERN_ERR, scsi_cmd, "scsi_map_dma failed!\n");
3281 } else if (nseg > PMCRAID_MAX_IOADLS) {
3282 scsi_dma_unmap(scsi_cmd);
3283 scmd_printk(KERN_ERR, scsi_cmd,
3284 "sg count is (%d) more than allowed!\n", nseg);
3288 /* Initialize IOARCB data transfer length fields */
3289 if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
3290 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
3292 ioarcb->request_flags0 |= NO_LINK_DESCS;
3293 ioarcb->data_transfer_length = cpu_to_le32(length);
3294 ioadl = pmcraid_init_ioadls(cmd, nseg);
3296 /* Initialize IOADL descriptor addresses */
3297 scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
3298 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
3299 ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
3302 /* setup last descriptor */
3303 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3309 * pmcraid_free_sglist - Frees an allocated SG buffer list
3310 * @sglist: scatter/gather list pointer
3312 * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
3317 static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
3321 for (i = 0; i < sglist->num_sg; i++)
3322 __free_pages(sg_page(&(sglist->scatterlist[i])),
3329 * pmcraid_alloc_sglist - Allocates memory for a SG list
3330 * @buflen: buffer length
3332 * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
3336 * pointer to sglist / NULL on failure
3338 static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
3340 struct pmcraid_sglist *sglist;
3341 struct scatterlist *scatterlist;
3348 sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
3349 order = (sg_size > 0) ? get_order(sg_size) : 0;
3350 bsize_elem = PAGE_SIZE * (1 << order);
3352 /* Determine the actual number of sg entries needed */
3353 if (buflen % bsize_elem)
3354 num_elem = (buflen / bsize_elem) + 1;
3356 num_elem = buflen / bsize_elem;
3358 /* Allocate a scatter/gather list for the DMA */
3359 sglist = kzalloc(sizeof(struct pmcraid_sglist) +
3360 (sizeof(struct scatterlist) * (num_elem - 1)),
3366 scatterlist = sglist->scatterlist;
3367 sg_init_table(scatterlist, num_elem);
3368 sglist->order = order;
3369 sglist->num_sg = num_elem;
3372 for (i = 0; i < num_elem; i++) {
3373 page = alloc_pages(GFP_KERNEL|GFP_DMA|__GFP_ZERO, order);
3375 for (j = i - 1; j >= 0; j--)
3376 __free_pages(sg_page(&scatterlist[j]), order);
3381 sg_set_page(&scatterlist[i], page,
3382 sg_size < bsize_elem ? sg_size : bsize_elem, 0);
3383 sg_size -= bsize_elem;
3390 * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
3391 * @sglist: scatter/gather list pointer
3392 * @buffer: buffer pointer
3393 * @len: buffer length
3394 * @direction: data transfer direction
3396 * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
3399 * 0 on success / other on failure
3401 static int pmcraid_copy_sglist(
3402 struct pmcraid_sglist *sglist,
3403 unsigned long buffer,
3408 struct scatterlist *scatterlist;
3414 /* Determine the actual number of bytes per element */
3415 bsize_elem = PAGE_SIZE * (1 << sglist->order);
3417 scatterlist = sglist->scatterlist;
3419 for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
3420 struct page *page = sg_page(&scatterlist[i]);
3423 if (direction == DMA_TO_DEVICE)
3424 rc = __copy_from_user(kaddr,
3428 rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
3433 pmcraid_err("failed to copy user data into sg list\n");
3437 scatterlist[i].length = bsize_elem;
3440 if (len % bsize_elem) {
3441 struct page *page = sg_page(&scatterlist[i]);
3445 if (direction == DMA_TO_DEVICE)
3446 rc = __copy_from_user(kaddr,
3450 rc = __copy_to_user((void *)buffer,
3456 scatterlist[i].length = len % bsize_elem;
3460 pmcraid_err("failed to copy user data into sg list\n");
3468 * pmcraid_queuecommand - Queue a mid-layer request
3469 * @scsi_cmd: scsi command struct
3470 * @done: done function
3472 * This function queues a request generated by the mid-layer. Midlayer calls
3473 * this routine within host->lock. Some of the functions called by queuecommand
3474 * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
3478 * SCSI_MLQUEUE_DEVICE_BUSY if device is busy
3479 * SCSI_MLQUEUE_HOST_BUSY if host is busy
3481 static int pmcraid_queuecommand_lck(
3482 struct scsi_cmnd *scsi_cmd,
3483 void (*done) (struct scsi_cmnd *)
3486 struct pmcraid_instance *pinstance;
3487 struct pmcraid_resource_entry *res;
3488 struct pmcraid_ioarcb *ioarcb;
3489 struct pmcraid_cmd *cmd;
3494 (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
3495 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
3496 scsi_cmd->scsi_done = done;
3497 res = scsi_cmd->device->hostdata;
3498 scsi_cmd->result = (DID_OK << 16);
3500 /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
3503 if (pinstance->ioa_state == IOA_STATE_DEAD) {
3504 pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
3505 scsi_cmd->result = (DID_NO_CONNECT << 16);
3506 scsi_cmd->scsi_done(scsi_cmd);
3510 /* If IOA reset is in progress, can't queue the commands */
3511 if (pinstance->ioa_reset_in_progress)
3512 return SCSI_MLQUEUE_HOST_BUSY;
3514 /* Firmware doesn't support SYNCHRONIZE_CACHE command (0x35), complete
3515 * the command here itself with success return
3517 if (scsi_cmd->cmnd[0] == SYNCHRONIZE_CACHE) {
3518 pmcraid_info("SYNC_CACHE(0x35), completing in driver itself\n");
3519 scsi_cmd->scsi_done(scsi_cmd);
3523 /* initialize the command and IOARCB to be sent to IOA */
3524 cmd = pmcraid_get_free_cmd(pinstance);
3527 pmcraid_err("free command block is not available\n");
3528 return SCSI_MLQUEUE_HOST_BUSY;
3531 cmd->scsi_cmd = scsi_cmd;
3532 ioarcb = &(cmd->ioa_cb->ioarcb);
3533 memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
3534 ioarcb->resource_handle = res->cfg_entry.resource_handle;
3535 ioarcb->request_type = REQ_TYPE_SCSI;
3537 /* set hrrq number where the IOA should respond to. Note that all cmds
3538 * generated internally uses hrrq_id 0, exception to this is the cmd
3539 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3540 * hrrq_id assigned here in queuecommand
3542 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3543 pinstance->num_hrrq;
3544 cmd->cmd_done = pmcraid_io_done;
3546 if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
3547 if (scsi_cmd->underflow == 0)
3548 ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
3550 if (res->sync_reqd) {
3551 ioarcb->request_flags0 |= SYNC_COMPLETE;
3555 ioarcb->request_flags0 |= NO_LINK_DESCS;
3556 ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
3558 if (RES_IS_GSCSI(res->cfg_entry))
3559 ioarcb->request_flags1 |= DELAY_AFTER_RESET;
3562 rc = pmcraid_build_ioadl(pinstance, cmd);
3564 pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
3565 le32_to_cpu(ioarcb->response_handle) >> 2,
3566 scsi_cmd->cmnd[0], pinstance->host->unique_id,
3567 RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
3568 PMCRAID_PHYS_BUS_ID,
3569 RES_IS_VSET(res->cfg_entry) ?
3570 (fw_version <= PMCRAID_FW_VERSION_1 ?
3571 res->cfg_entry.unique_flags1 :
3572 res->cfg_entry.array_id & 0xFF) :
3573 RES_TARGET(res->cfg_entry.resource_address),
3574 RES_LUN(res->cfg_entry.resource_address));
3576 if (likely(rc == 0)) {
3577 _pmcraid_fire_command(cmd);
3579 pmcraid_err("queuecommand could not build ioadl\n");
3580 pmcraid_return_cmd(cmd);
3581 rc = SCSI_MLQUEUE_HOST_BUSY;
3587 static DEF_SCSI_QCMD(pmcraid_queuecommand)
3590 * pmcraid_open -char node "open" entry, allowed only users with admin access
3592 static int pmcraid_chr_open(struct inode *inode, struct file *filep)
3594 struct pmcraid_instance *pinstance;
3596 if (!capable(CAP_SYS_ADMIN))
3599 /* Populate adapter instance * pointer for use by ioctl */
3600 pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
3601 filep->private_data = pinstance;
3607 * pmcraid_release - char node "release" entry point
3609 static int pmcraid_chr_release(struct inode *inode, struct file *filep)
3611 struct pmcraid_instance *pinstance = filep->private_data;
3613 filep->private_data = NULL;
3614 fasync_helper(-1, filep, 0, &pinstance->aen_queue);
3620 * pmcraid_fasync - Async notifier registration from applications
3622 * This function adds the calling process to a driver global queue. When an
3623 * event occurs, SIGIO will be sent to all processes in this queue.
3625 static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
3627 struct pmcraid_instance *pinstance;
3630 pinstance = filep->private_data;
3631 mutex_lock(&pinstance->aen_queue_lock);
3632 rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
3633 mutex_unlock(&pinstance->aen_queue_lock);
3640 * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
3641 * commands sent over IOCTL interface
3643 * @cmd : pointer to struct pmcraid_cmd
3644 * @buflen : length of the request buffer
3645 * @direction : data transfer direction
3648 * 0 on success, non-zero error code on failure
3650 static int pmcraid_build_passthrough_ioadls(
3651 struct pmcraid_cmd *cmd,
3656 struct pmcraid_sglist *sglist = NULL;
3657 struct scatterlist *sg = NULL;
3658 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
3659 struct pmcraid_ioadl_desc *ioadl;
3662 sglist = pmcraid_alloc_sglist(buflen);
3665 pmcraid_err("can't allocate memory for passthrough SGls\n");
3669 sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
3670 sglist->scatterlist,
3671 sglist->num_sg, direction);
3673 if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
3674 dev_err(&cmd->drv_inst->pdev->dev,
3675 "Failed to map passthrough buffer!\n");
3676 pmcraid_free_sglist(sglist);
3680 cmd->sglist = sglist;
3681 ioarcb->request_flags0 |= NO_LINK_DESCS;
3683 ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
3685 /* Initialize IOADL descriptor addresses */
3686 for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
3687 ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
3688 ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
3692 /* setup the last descriptor */
3693 ioadl[i - 1].flags = IOADL_FLAGS_LAST_DESC;
3700 * pmcraid_release_passthrough_ioadls - release passthrough ioadls
3702 * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
3703 * @buflen: size of the request buffer
3704 * @direction: data transfer direction
3707 * 0 on success, non-zero error code on failure
3709 static void pmcraid_release_passthrough_ioadls(
3710 struct pmcraid_cmd *cmd,
3715 struct pmcraid_sglist *sglist = cmd->sglist;
3718 pci_unmap_sg(cmd->drv_inst->pdev,
3719 sglist->scatterlist,
3722 pmcraid_free_sglist(sglist);
3728 * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
3730 * @pinstance: pointer to adapter instance structure
3732 * @arg: pointer to pmcraid_passthrough_buffer user buffer
3735 * 0 on success, non-zero error code on failure
3737 static long pmcraid_ioctl_passthrough(
3738 struct pmcraid_instance *pinstance,
3739 unsigned int ioctl_cmd,
3740 unsigned int buflen,
3744 struct pmcraid_passthrough_ioctl_buffer *buffer;
3745 struct pmcraid_ioarcb *ioarcb;
3746 struct pmcraid_cmd *cmd;
3747 struct pmcraid_cmd *cancel_cmd;
3748 unsigned long request_buffer;
3749 unsigned long request_offset;
3750 unsigned long lock_flags;
3755 u8 access, direction;
3758 /* If IOA reset is in progress, wait 10 secs for reset to complete */
3759 if (pinstance->ioa_reset_in_progress) {
3760 rc = wait_event_interruptible_timeout(
3761 pinstance->reset_wait_q,
3762 !pinstance->ioa_reset_in_progress,
3763 msecs_to_jiffies(10000));
3768 return -ERESTARTSYS;
3771 /* If adapter is not in operational state, return error */
3772 if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
3773 pmcraid_err("IOA is not operational\n");
3777 buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
3778 buffer = kmalloc(buffer_size, GFP_KERNEL);
3781 pmcraid_err("no memory for passthrough buffer\n");
3786 offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
3788 request_buffer = arg + request_offset;
3790 rc = __copy_from_user(buffer,
3791 (struct pmcraid_passthrough_ioctl_buffer *) arg,
3792 sizeof(struct pmcraid_passthrough_ioctl_buffer));
3796 offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
3799 pmcraid_err("ioctl: can't copy passthrough buffer\n");
3801 goto out_free_buffer;
3804 request_size = buffer->ioarcb.data_transfer_length;
3806 if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
3807 access = VERIFY_READ;
3808 direction = DMA_TO_DEVICE;
3810 access = VERIFY_WRITE;
3811 direction = DMA_FROM_DEVICE;
3814 if (request_size > 0) {
3815 rc = access_ok(access, arg, request_offset + request_size);
3819 goto out_free_buffer;
3823 /* check if we have any additional command parameters */
3824 if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
3826 goto out_free_buffer;
3829 cmd = pmcraid_get_free_cmd(pinstance);
3832 pmcraid_err("free command block is not available\n");
3834 goto out_free_buffer;
3837 cmd->scsi_cmd = NULL;
3838 ioarcb = &(cmd->ioa_cb->ioarcb);
3840 /* Copy the user-provided IOARCB stuff field by field */
3841 ioarcb->resource_handle = buffer->ioarcb.resource_handle;
3842 ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
3843 ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
3844 ioarcb->request_type = buffer->ioarcb.request_type;
3845 ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
3846 ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
3847 memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
3849 if (buffer->ioarcb.add_cmd_param_length) {
3850 ioarcb->add_cmd_param_length =
3851 buffer->ioarcb.add_cmd_param_length;
3852 ioarcb->add_cmd_param_offset =
3853 buffer->ioarcb.add_cmd_param_offset;
3854 memcpy(ioarcb->add_data.u.add_cmd_params,
3855 buffer->ioarcb.add_data.u.add_cmd_params,
3856 buffer->ioarcb.add_cmd_param_length);
3859 /* set hrrq number where the IOA should respond to. Note that all cmds
3860 * generated internally uses hrrq_id 0, exception to this is the cmd
3861 * block of scsi_cmd which is re-used (e.g. cancel/abort), which uses
3862 * hrrq_id assigned here in queuecommand
3864 ioarcb->hrrq_id = atomic_add_return(1, &(pinstance->last_message_id)) %
3865 pinstance->num_hrrq;
3868 rc = pmcraid_build_passthrough_ioadls(cmd,
3872 pmcraid_err("couldn't build passthrough ioadls\n");
3873 goto out_free_buffer;
3877 /* If data is being written into the device, copy the data from user
3880 if (direction == DMA_TO_DEVICE && request_size > 0) {
3881 rc = pmcraid_copy_sglist(cmd->sglist,
3886 pmcraid_err("failed to copy user buffer\n");
3887 goto out_free_sglist;
3891 /* passthrough ioctl is a blocking command so, put the user to sleep
3892 * until timeout. Note that a timeout value of 0 means, do timeout.
3894 cmd->cmd_done = pmcraid_internal_done;
3895 init_completion(&cmd->wait_for_completion);
3896 cmd->completion_req = 1;
3898 pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
3899 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
3900 cmd->ioa_cb->ioarcb.cdb[0],
3901 le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
3903 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3904 _pmcraid_fire_command(cmd);
3905 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3907 /* NOTE ! Remove the below line once abort_task is implemented
3908 * in firmware. This line disables ioctl command timeout handling logic
3909 * similar to IO command timeout handling, making ioctl commands to wait
3910 * until the command completion regardless of timeout value specified in
3913 buffer->ioarcb.cmd_timeout = 0;
3915 /* If command timeout is specified put caller to wait till that time,
3916 * otherwise it would be blocking wait. If command gets timed out, it
3919 if (buffer->ioarcb.cmd_timeout == 0) {
3920 wait_for_completion(&cmd->wait_for_completion);
3921 } else if (!wait_for_completion_timeout(
3922 &cmd->wait_for_completion,
3923 msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
3925 pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
3926 le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
3927 cmd->ioa_cb->ioarcb.cdb[0]);
3929 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
3930 cancel_cmd = pmcraid_abort_cmd(cmd);
3931 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
3934 wait_for_completion(&cancel_cmd->wait_for_completion);
3935 ioasc = cancel_cmd->ioa_cb->ioasa.ioasc;
3936 pmcraid_return_cmd(cancel_cmd);
3938 /* if abort task couldn't find the command i.e it got
3939 * completed prior to aborting, return good completion.
3940 * if command got aborted succesfully or there was IOA
3941 * reset due to abort task itself getting timedout then
3944 if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
3945 PMCRAID_IOASC_SENSE_KEY(ioasc) == 0x00) {
3946 if (ioasc != PMCRAID_IOASC_GC_IOARCB_NOTFOUND)
3948 goto out_handle_response;
3952 /* no command block for abort task or abort task failed to abort
3953 * the IOARCB, then wait for 150 more seconds and initiate reset
3954 * sequence after timeout
3956 if (!wait_for_completion_timeout(
3957 &cmd->wait_for_completion,
3958 msecs_to_jiffies(150 * 1000))) {
3959 pmcraid_reset_bringup(cmd->drv_inst);
3964 out_handle_response:
3965 /* copy entire IOASA buffer and return IOCTL success.
3966 * If copying IOASA to user-buffer fails, return
3969 if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
3970 sizeof(struct pmcraid_ioasa))) {
3971 pmcraid_err("failed to copy ioasa buffer to user\n");
3975 /* If the data transfer was from device, copy the data onto user
3978 else if (direction == DMA_FROM_DEVICE && request_size > 0) {
3979 rc = pmcraid_copy_sglist(cmd->sglist,
3984 pmcraid_err("failed to copy user buffer\n");
3990 pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
3991 pmcraid_return_cmd(cmd);
4003 * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
4005 * @pinstance: pointer to adapter instance structure
4006 * @cmd: ioctl command passed in
4007 * @buflen: length of user_buffer
4008 * @user_buffer: user buffer pointer
4011 * 0 in case of success, otherwise appropriate error code
4013 static long pmcraid_ioctl_driver(
4014 struct pmcraid_instance *pinstance,
4016 unsigned int buflen,
4017 void __user *user_buffer
4022 if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
4023 pmcraid_err("ioctl_driver: access fault in request buffer\n");
4028 case PMCRAID_IOCTL_RESET_ADAPTER:
4029 pmcraid_reset_bringup(pinstance);
4041 * pmcraid_check_ioctl_buffer - check for proper access to user buffer
4043 * @cmd: ioctl command
4045 * @hdr: pointer to kernel memory for pmcraid_ioctl_header
4048 * negetive error code if there are access issues, otherwise zero.
4049 * Upon success, returns ioctl header copied out of user buffer.
4052 static int pmcraid_check_ioctl_buffer(
4055 struct pmcraid_ioctl_header *hdr
4059 int access = VERIFY_READ;
4061 if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
4062 pmcraid_err("couldn't copy ioctl header from user buffer\n");
4066 /* check for valid driver signature */
4067 rc = memcmp(hdr->signature,
4068 PMCRAID_IOCTL_SIGNATURE,
4069 sizeof(hdr->signature));
4071 pmcraid_err("signature verification failed\n");
4075 /* check for appropriate buffer access */
4076 if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
4077 access = VERIFY_WRITE;
4079 rc = access_ok(access,
4080 (arg + sizeof(struct pmcraid_ioctl_header)),
4081 hdr->buffer_length);
4083 pmcraid_err("access failed for user buffer of size %d\n",
4084 hdr->buffer_length);
4092 * pmcraid_ioctl - char node ioctl entry point
4094 static long pmcraid_chr_ioctl(
4100 struct pmcraid_instance *pinstance = NULL;
4101 struct pmcraid_ioctl_header *hdr = NULL;
4102 int retval = -ENOTTY;
4104 hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header));
4107 pmcraid_err("faile to allocate memory for ioctl header\n");
4111 retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
4114 pmcraid_info("chr_ioctl: header check failed\n");
4119 pinstance = filep->private_data;
4122 pmcraid_info("adapter instance is not found\n");
4127 switch (_IOC_TYPE(cmd)) {
4129 case PMCRAID_PASSTHROUGH_IOCTL:
4130 /* If ioctl code is to download microcode, we need to block
4131 * mid-layer requests.
4133 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4134 scsi_block_requests(pinstance->host);
4136 retval = pmcraid_ioctl_passthrough(pinstance,
4141 if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
4142 scsi_unblock_requests(pinstance->host);
4145 case PMCRAID_DRIVER_IOCTL:
4146 arg += sizeof(struct pmcraid_ioctl_header);
4147 retval = pmcraid_ioctl_driver(pinstance,
4150 (void __user *)arg);
4164 * File operations structure for management interface
4166 static const struct file_operations pmcraid_fops = {
4167 .owner = THIS_MODULE,
4168 .open = pmcraid_chr_open,
4169 .release = pmcraid_chr_release,
4170 .fasync = pmcraid_chr_fasync,
4171 .unlocked_ioctl = pmcraid_chr_ioctl,
4172 #ifdef CONFIG_COMPAT
4173 .compat_ioctl = pmcraid_chr_ioctl,
4175 .llseek = noop_llseek,
4182 * pmcraid_show_log_level - Display adapter's error logging level
4183 * @dev: class device struct
4187 * number of bytes printed to buffer
4189 static ssize_t pmcraid_show_log_level(
4191 struct device_attribute *attr,
4194 struct Scsi_Host *shost = class_to_shost(dev);
4195 struct pmcraid_instance *pinstance =
4196 (struct pmcraid_instance *)shost->hostdata;
4197 return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
4201 * pmcraid_store_log_level - Change the adapter's error logging level
4202 * @dev: class device struct
4207 * number of bytes printed to buffer
4209 static ssize_t pmcraid_store_log_level(
4211 struct device_attribute *attr,
4216 struct Scsi_Host *shost;
4217 struct pmcraid_instance *pinstance;
4220 if (strict_strtoul(buf, 10, &val))
4222 /* log-level should be from 0 to 2 */
4226 shost = class_to_shost(dev);
4227 pinstance = (struct pmcraid_instance *)shost->hostdata;
4228 pinstance->current_log_level = val;
4233 static struct device_attribute pmcraid_log_level_attr = {
4235 .name = "log_level",
4236 .mode = S_IRUGO | S_IWUSR,
4238 .show = pmcraid_show_log_level,
4239 .store = pmcraid_store_log_level,
4243 * pmcraid_show_drv_version - Display driver version
4244 * @dev: class device struct
4248 * number of bytes printed to buffer
4250 static ssize_t pmcraid_show_drv_version(
4252 struct device_attribute *attr,
4256 return snprintf(buf, PAGE_SIZE, "version: %s, build date: %s\n",
4257 PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
4260 static struct device_attribute pmcraid_driver_version_attr = {
4262 .name = "drv_version",
4265 .show = pmcraid_show_drv_version,
4269 * pmcraid_show_io_adapter_id - Display driver assigned adapter id
4270 * @dev: class device struct
4274 * number of bytes printed to buffer
4276 static ssize_t pmcraid_show_adapter_id(
4278 struct device_attribute *attr,
4282 struct Scsi_Host *shost = class_to_shost(dev);
4283 struct pmcraid_instance *pinstance =
4284 (struct pmcraid_instance *)shost->hostdata;
4285 u32 adapter_id = (pinstance->pdev->bus->number << 8) |
4286 pinstance->pdev->devfn;
4287 u32 aen_group = pmcraid_event_family.id;
4289 return snprintf(buf, PAGE_SIZE,
4290 "adapter id: %d\nminor: %d\naen group: %d\n",
4291 adapter_id, MINOR(pinstance->cdev.dev), aen_group);
4294 static struct device_attribute pmcraid_adapter_id_attr = {
4296 .name = "adapter_id",
4297 .mode = S_IRUGO | S_IWUSR,
4299 .show = pmcraid_show_adapter_id,
4302 static struct device_attribute *pmcraid_host_attrs[] = {
4303 &pmcraid_log_level_attr,
4304 &pmcraid_driver_version_attr,
4305 &pmcraid_adapter_id_attr,
4310 /* host template structure for pmcraid driver */
4311 static struct scsi_host_template pmcraid_host_template = {
4312 .module = THIS_MODULE,
4313 .name = PMCRAID_DRIVER_NAME,
4314 .queuecommand = pmcraid_queuecommand,
4315 .eh_abort_handler = pmcraid_eh_abort_handler,
4316 .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
4317 .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
4318 .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
4319 .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
4321 .slave_alloc = pmcraid_slave_alloc,
4322 .slave_configure = pmcraid_slave_configure,
4323 .slave_destroy = pmcraid_slave_destroy,
4324 .change_queue_depth = pmcraid_change_queue_depth,
4325 .change_queue_type = pmcraid_change_queue_type,
4326 .can_queue = PMCRAID_MAX_IO_CMD,
4328 .sg_tablesize = PMCRAID_MAX_IOADLS,
4329 .max_sectors = PMCRAID_IOA_MAX_SECTORS,
4330 .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
4331 .use_clustering = ENABLE_CLUSTERING,
4332 .shost_attrs = pmcraid_host_attrs,
4333 .proc_name = PMCRAID_DRIVER_NAME
4337 * pmcraid_isr_msix - implements MSI-X interrupt handling routine
4338 * @irq: interrupt vector number
4339 * @dev_id: pointer hrrq_vector
4342 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4345 static irqreturn_t pmcraid_isr_msix(int irq, void *dev_id)
4347 struct pmcraid_isr_param *hrrq_vector;
4348 struct pmcraid_instance *pinstance;
4349 unsigned long lock_flags;
4353 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4354 hrrq_id = hrrq_vector->hrrq_id;
4355 pinstance = hrrq_vector->drv_inst;
4358 /* Read the interrupt */
4359 intrs_val = pmcraid_read_interrupts(pinstance);
4361 ((ioread32(pinstance->int_regs.host_ioa_interrupt_reg)
4362 & DOORBELL_INTR_MSIX_CLR) == 0)) {
4363 /* Any error interrupts including unit_check,
4364 * initiate IOA reset.In case of unit check indicate
4365 * to reset_sequence that IOA unit checked and prepare
4366 * for a dump during reset sequence
4368 if (intrs_val & PMCRAID_ERROR_INTERRUPTS) {
4369 if (intrs_val & INTRS_IOA_UNIT_CHECK)
4370 pinstance->ioa_unit_check = 1;
4372 pmcraid_err("ISR: error interrupts: %x \
4373 initiating reset\n", intrs_val);
4374 spin_lock_irqsave(pinstance->host->host_lock,
4376 pmcraid_initiate_reset(pinstance);
4377 spin_unlock_irqrestore(
4378 pinstance->host->host_lock,
4381 /* If interrupt was as part of the ioa initialization,
4382 * clear it. Delete the timer and wakeup the
4383 * reset engine to proceed with reset sequence
4385 if (intrs_val & INTRS_TRANSITION_TO_OPERATIONAL)
4386 pmcraid_clr_trans_op(pinstance);
4388 /* Clear the interrupt register by writing
4389 * to host to ioa doorbell. Once done
4390 * FW will clear the interrupt.
4392 iowrite32(DOORBELL_INTR_MSIX_CLR,
4393 pinstance->int_regs.host_ioa_interrupt_reg);
4394 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4400 tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
4406 * pmcraid_isr - implements legacy interrupt handling routine
4408 * @irq: interrupt vector number
4409 * @dev_id: pointer hrrq_vector
4412 * IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
4414 static irqreturn_t pmcraid_isr(int irq, void *dev_id)
4416 struct pmcraid_isr_param *hrrq_vector;
4417 struct pmcraid_instance *pinstance;
4419 unsigned long lock_flags;
4422 /* In case of legacy interrupt mode where interrupts are shared across
4423 * isrs, it may be possible that the current interrupt is not from IOA
4426 printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
4429 hrrq_vector = (struct pmcraid_isr_param *)dev_id;
4430 pinstance = hrrq_vector->drv_inst;
4432 intrs = pmcraid_read_interrupts(pinstance);
4434 if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0))
4437 /* Any error interrupts including unit_check, initiate IOA reset.
4438 * In case of unit check indicate to reset_sequence that IOA unit
4439 * checked and prepare for a dump during reset sequence
4441 if (intrs & PMCRAID_ERROR_INTERRUPTS) {
4443 if (intrs & INTRS_IOA_UNIT_CHECK)
4444 pinstance->ioa_unit_check = 1;
4447 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4448 pmcraid_err("ISR: error interrupts: %x initiating reset\n",
4451 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4452 spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
4453 pmcraid_initiate_reset(pinstance);
4454 spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
4456 /* If interrupt was as part of the ioa initialization,
4457 * clear. Delete the timer and wakeup the
4458 * reset engine to proceed with reset sequence
4460 if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
4461 pmcraid_clr_trans_op(pinstance);
4464 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4466 pinstance->int_regs.ioa_host_interrupt_clr_reg);
4469 &(pinstance->isr_tasklet[hrrq_id]));
4478 * pmcraid_worker_function - worker thread function
4480 * @workp: pointer to struct work queue
4486 static void pmcraid_worker_function(struct work_struct *workp)
4488 struct pmcraid_instance *pinstance;
4489 struct pmcraid_resource_entry *res;
4490 struct pmcraid_resource_entry *temp;
4491 struct scsi_device *sdev;
4492 unsigned long lock_flags;
4493 unsigned long host_lock_flags;
4495 u8 bus, target, lun;
4497 pinstance = container_of(workp, struct pmcraid_instance, worker_q);
4498 /* add resources only after host is added into system */
4499 if (!atomic_read(&pinstance->expose_resources))
4502 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
4504 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
4505 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
4507 if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
4508 sdev = res->scsi_dev;
4510 /* host_lock must be held before calling
4513 spin_lock_irqsave(pinstance->host->host_lock,
4515 if (!scsi_device_get(sdev)) {
4516 spin_unlock_irqrestore(
4517 pinstance->host->host_lock,
4519 pmcraid_info("deleting %x from midlayer\n",
4520 res->cfg_entry.resource_address);
4521 list_move_tail(&res->queue,
4522 &pinstance->free_res_q);
4523 spin_unlock_irqrestore(
4524 &pinstance->resource_lock,
4526 scsi_remove_device(sdev);
4527 scsi_device_put(sdev);
4528 spin_lock_irqsave(&pinstance->resource_lock,
4530 res->change_detected = 0;
4532 spin_unlock_irqrestore(
4533 pinstance->host->host_lock,
4539 list_for_each_entry(res, &pinstance->used_res_q, queue) {
4541 if (res->change_detected == RES_CHANGE_ADD) {
4543 if (!pmcraid_expose_resource(fw_version,
4547 if (RES_IS_VSET(res->cfg_entry)) {
4548 bus = PMCRAID_VSET_BUS_ID;
4549 if (fw_version <= PMCRAID_FW_VERSION_1)
4550 target = res->cfg_entry.unique_flags1;
4552 target = res->cfg_entry.array_id & 0xFF;
4553 lun = PMCRAID_VSET_LUN_ID;
4555 bus = PMCRAID_PHYS_BUS_ID;
4558 res->cfg_entry.resource_address);
4559 lun = RES_LUN(res->cfg_entry.resource_address);
4562 res->change_detected = 0;
4563 spin_unlock_irqrestore(&pinstance->resource_lock,
4565 scsi_add_device(pinstance->host, bus, target, lun);
4566 spin_lock_irqsave(&pinstance->resource_lock,
4571 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
4575 * pmcraid_tasklet_function - Tasklet function
4577 * @instance: pointer to msix param structure
4582 static void pmcraid_tasklet_function(unsigned long instance)
4584 struct pmcraid_isr_param *hrrq_vector;
4585 struct pmcraid_instance *pinstance;
4586 unsigned long hrrq_lock_flags;
4587 unsigned long pending_lock_flags;
4588 unsigned long host_lock_flags;
4589 spinlock_t *lockp; /* hrrq buffer lock */
4593 hrrq_vector = (struct pmcraid_isr_param *)instance;
4594 pinstance = hrrq_vector->drv_inst;
4595 id = hrrq_vector->hrrq_id;
4596 lockp = &(pinstance->hrrq_lock[id]);
4598 /* loop through each of the commands responded by IOA. Each HRRQ buf is
4599 * protected by its own lock. Traversals must be done within this lock
4600 * as there may be multiple tasklets running on multiple CPUs. Note
4601 * that the lock is held just for picking up the response handle and
4602 * manipulating hrrq_curr/toggle_bit values.
4604 spin_lock_irqsave(lockp, hrrq_lock_flags);
4606 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4608 while ((resp & HRRQ_TOGGLE_BIT) ==
4609 pinstance->host_toggle_bit[id]) {
4611 int cmd_index = resp >> 2;
4612 struct pmcraid_cmd *cmd = NULL;
4614 if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
4615 pinstance->hrrq_curr[id]++;
4617 pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
4618 pinstance->host_toggle_bit[id] ^= 1u;
4621 if (cmd_index >= PMCRAID_MAX_CMD) {
4622 /* In case of invalid response handle, log message */
4623 pmcraid_err("Invalid response handle %d\n", cmd_index);
4624 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4628 cmd = pinstance->cmd_list[cmd_index];
4629 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4631 spin_lock_irqsave(&pinstance->pending_pool_lock,
4632 pending_lock_flags);
4633 list_del(&cmd->free_list);
4634 spin_unlock_irqrestore(&pinstance->pending_pool_lock,
4635 pending_lock_flags);
4636 del_timer(&cmd->timer);
4637 atomic_dec(&pinstance->outstanding_cmds);
4639 if (cmd->cmd_done == pmcraid_ioa_reset) {
4640 spin_lock_irqsave(pinstance->host->host_lock,
4643 spin_unlock_irqrestore(pinstance->host->host_lock,
4645 } else if (cmd->cmd_done != NULL) {
4648 /* loop over until we are done with all responses */
4649 spin_lock_irqsave(lockp, hrrq_lock_flags);
4650 resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
4653 spin_unlock_irqrestore(lockp, hrrq_lock_flags);
4657 * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
4658 * @pinstance: pointer to adapter instance structure
4660 * This routine un-registers registered interrupt handler and
4661 * also frees irqs/vectors.
4667 void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
4671 for (i = 0; i < pinstance->num_hrrq; i++)
4672 free_irq(pinstance->hrrq_vector[i].vector,
4673 &(pinstance->hrrq_vector[i]));
4675 if (pinstance->interrupt_mode) {
4676 pci_disable_msix(pinstance->pdev);
4677 pinstance->interrupt_mode = 0;
4682 * pmcraid_register_interrupt_handler - registers interrupt handler
4683 * @pinstance: pointer to per-adapter instance structure
4686 * 0 on success, non-zero error code otherwise.
4689 pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
4692 struct pci_dev *pdev = pinstance->pdev;
4694 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
4695 int num_hrrq = PMCRAID_NUM_MSIX_VECTORS;
4696 struct msix_entry entries[PMCRAID_NUM_MSIX_VECTORS];
4698 for (i = 0; i < PMCRAID_NUM_MSIX_VECTORS; i++)
4699 entries[i].entry = i;
4701 rc = pci_enable_msix(pdev, entries, num_hrrq);
4703 goto pmcraid_isr_legacy;
4705 /* Check how many MSIX vectors are allocated and register
4706 * msi-x handlers for each of them giving appropriate buffer
4710 if (pci_enable_msix(pdev, entries, num_hrrq))
4711 goto pmcraid_isr_legacy;
4714 for (i = 0; i < num_hrrq; i++) {
4715 pinstance->hrrq_vector[i].hrrq_id = i;
4716 pinstance->hrrq_vector[i].drv_inst = pinstance;
4717 pinstance->hrrq_vector[i].vector = entries[i].vector;
4718 rc = request_irq(pinstance->hrrq_vector[i].vector,
4719 pmcraid_isr_msix, 0,
4720 PMCRAID_DRIVER_NAME,
4721 &(pinstance->hrrq_vector[i]));
4725 for (j = 0; j < i; j++)
4726 free_irq(entries[j].vector,
4727 &(pinstance->hrrq_vector[j]));
4728 pci_disable_msix(pdev);
4729 goto pmcraid_isr_legacy;
4733 pinstance->num_hrrq = num_hrrq;
4734 pinstance->interrupt_mode = 1;
4735 iowrite32(DOORBELL_INTR_MODE_MSIX,
4736 pinstance->int_regs.host_ioa_interrupt_reg);
4737 ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
4738 goto pmcraid_isr_out;
4742 /* If MSI-X registration failed fallback to legacy mode, where
4743 * only one hrrq entry will be used
4745 pinstance->hrrq_vector[0].hrrq_id = 0;
4746 pinstance->hrrq_vector[0].drv_inst = pinstance;
4747 pinstance->hrrq_vector[0].vector = pdev->irq;
4748 pinstance->num_hrrq = 1;
4751 rc = request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
4752 PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
4758 * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
4759 * @pinstance: per adapter instance structure pointer
4760 * @max_index: number of buffer blocks to release
4766 pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
4769 for (i = 0; i < max_index; i++) {
4770 kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
4771 pinstance->cmd_list[i] = NULL;
4773 kmem_cache_destroy(pinstance->cmd_cachep);
4774 pinstance->cmd_cachep = NULL;
4778 * pmcraid_release_control_blocks - releases buffers alloced for control blocks
4779 * @pinstance: pointer to per adapter instance structure
4780 * @max_index: number of buffers (from 0 onwards) to release
4782 * This function assumes that the command blocks for which control blocks are
4783 * linked are not released.
4789 pmcraid_release_control_blocks(
4790 struct pmcraid_instance *pinstance,
4796 if (pinstance->control_pool == NULL)
4799 for (i = 0; i < max_index; i++) {
4800 pci_pool_free(pinstance->control_pool,
4801 pinstance->cmd_list[i]->ioa_cb,
4802 pinstance->cmd_list[i]->ioa_cb_bus_addr);
4803 pinstance->cmd_list[i]->ioa_cb = NULL;
4804 pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
4806 pci_pool_destroy(pinstance->control_pool);
4807 pinstance->control_pool = NULL;
4811 * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
4812 * @pinstance - pointer to per adapter instance structure
4814 * Allocates memory for command blocks using kernel slab allocator.
4817 * 0 in case of success; -ENOMEM in case of failure
4819 static int __devinit
4820 pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
4824 sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
4825 pinstance->host->unique_id);
4828 pinstance->cmd_cachep = kmem_cache_create(
4829 pinstance->cmd_pool_name,
4830 sizeof(struct pmcraid_cmd), 0,
4831 SLAB_HWCACHE_ALIGN, NULL);
4832 if (!pinstance->cmd_cachep)
4835 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4836 pinstance->cmd_list[i] =
4837 kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
4838 if (!pinstance->cmd_list[i]) {
4839 pmcraid_release_cmd_blocks(pinstance, i);
4847 * pmcraid_allocate_control_blocks - allocates memory control blocks
4848 * @pinstance : pointer to per adapter instance structure
4850 * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
4851 * and IOASAs. This is called after command blocks are already allocated.
4854 * 0 in case it can allocate all control blocks, otherwise -ENOMEM
4856 static int __devinit
4857 pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
4861 sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
4862 pinstance->host->unique_id);
4864 pinstance->control_pool =
4865 pci_pool_create(pinstance->ctl_pool_name,
4867 sizeof(struct pmcraid_control_block),
4868 PMCRAID_IOARCB_ALIGNMENT, 0);
4870 if (!pinstance->control_pool)
4873 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
4874 pinstance->cmd_list[i]->ioa_cb =
4876 pinstance->control_pool,
4878 &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
4880 if (!pinstance->cmd_list[i]->ioa_cb) {
4881 pmcraid_release_control_blocks(pinstance, i);
4884 memset(pinstance->cmd_list[i]->ioa_cb, 0,
4885 sizeof(struct pmcraid_control_block));
4891 * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
4892 * @pinstance: pointer to per adapter instance structure
4893 * @maxindex: size of hrrq buffer pointer array
4899 pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
4902 for (i = 0; i < maxindex; i++) {
4904 pci_free_consistent(pinstance->pdev,
4905 HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
4906 pinstance->hrrq_start[i],
4907 pinstance->hrrq_start_bus_addr[i]);
4909 /* reset pointers and toggle bit to zeros */
4910 pinstance->hrrq_start[i] = NULL;
4911 pinstance->hrrq_start_bus_addr[i] = 0;
4912 pinstance->host_toggle_bit[i] = 0;
4917 * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
4918 * @pinstance: pointer to per adapter instance structure
4921 * 0 hrrq buffers are allocated, -ENOMEM otherwise.
4923 static int __devinit
4924 pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
4928 buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
4930 for (i = 0; i < pinstance->num_hrrq; i++) {
4931 pinstance->hrrq_start[i] =
4932 pci_alloc_consistent(
4935 &(pinstance->hrrq_start_bus_addr[i]));
4937 if (pinstance->hrrq_start[i] == 0) {
4938 pmcraid_err("pci_alloc failed for hrrq vector : %d\n",
4940 pmcraid_release_host_rrqs(pinstance, i);
4944 memset(pinstance->hrrq_start[i], 0, buffer_size);
4945 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
4946 pinstance->hrrq_end[i] =
4947 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
4948 pinstance->host_toggle_bit[i] = 1;
4949 spin_lock_init(&pinstance->hrrq_lock[i]);
4955 * pmcraid_release_hcams - release HCAM buffers
4957 * @pinstance: pointer to per adapter instance structure
4962 static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
4964 if (pinstance->ccn.msg != NULL) {
4965 pci_free_consistent(pinstance->pdev,
4966 PMCRAID_AEN_HDR_SIZE +
4967 sizeof(struct pmcraid_hcam_ccn_ext),
4969 pinstance->ccn.baddr);
4971 pinstance->ccn.msg = NULL;
4972 pinstance->ccn.hcam = NULL;
4973 pinstance->ccn.baddr = 0;
4976 if (pinstance->ldn.msg != NULL) {
4977 pci_free_consistent(pinstance->pdev,
4978 PMCRAID_AEN_HDR_SIZE +
4979 sizeof(struct pmcraid_hcam_ldn),
4981 pinstance->ldn.baddr);
4983 pinstance->ldn.msg = NULL;
4984 pinstance->ldn.hcam = NULL;
4985 pinstance->ldn.baddr = 0;
4990 * pmcraid_allocate_hcams - allocates HCAM buffers
4991 * @pinstance : pointer to per adapter instance structure
4994 * 0 in case of successful allocation, non-zero otherwise
4996 static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
4998 pinstance->ccn.msg = pci_alloc_consistent(
5000 PMCRAID_AEN_HDR_SIZE +
5001 sizeof(struct pmcraid_hcam_ccn_ext),
5002 &(pinstance->ccn.baddr));
5004 pinstance->ldn.msg = pci_alloc_consistent(
5006 PMCRAID_AEN_HDR_SIZE +
5007 sizeof(struct pmcraid_hcam_ldn),
5008 &(pinstance->ldn.baddr));
5010 if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
5011 pmcraid_release_hcams(pinstance);
5013 pinstance->ccn.hcam =
5014 (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
5015 pinstance->ldn.hcam =
5016 (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
5018 atomic_set(&pinstance->ccn.ignore, 0);
5019 atomic_set(&pinstance->ldn.ignore, 0);
5022 return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
5026 * pmcraid_release_config_buffers - release config.table buffers
5027 * @pinstance: pointer to per adapter instance structure
5032 static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
5034 if (pinstance->cfg_table != NULL &&
5035 pinstance->cfg_table_bus_addr != 0) {
5036 pci_free_consistent(pinstance->pdev,
5037 sizeof(struct pmcraid_config_table),
5038 pinstance->cfg_table,
5039 pinstance->cfg_table_bus_addr);
5040 pinstance->cfg_table = NULL;
5041 pinstance->cfg_table_bus_addr = 0;
5044 if (pinstance->res_entries != NULL) {
5047 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5048 list_del(&pinstance->res_entries[i].queue);
5049 kfree(pinstance->res_entries);
5050 pinstance->res_entries = NULL;
5053 pmcraid_release_hcams(pinstance);
5057 * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
5058 * @pinstance : pointer to per adapter instance structure
5061 * 0 for successful allocation, -ENOMEM for any failure
5063 static int __devinit
5064 pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
5068 pinstance->res_entries =
5069 kzalloc(sizeof(struct pmcraid_resource_entry) *
5070 PMCRAID_MAX_RESOURCES, GFP_KERNEL);
5072 if (NULL == pinstance->res_entries) {
5073 pmcraid_err("failed to allocate memory for resource table\n");
5077 for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
5078 list_add_tail(&pinstance->res_entries[i].queue,
5079 &pinstance->free_res_q);
5081 pinstance->cfg_table =
5082 pci_alloc_consistent(pinstance->pdev,
5083 sizeof(struct pmcraid_config_table),
5084 &pinstance->cfg_table_bus_addr);
5086 if (NULL == pinstance->cfg_table) {
5087 pmcraid_err("couldn't alloc DMA memory for config table\n");
5088 pmcraid_release_config_buffers(pinstance);
5092 if (pmcraid_allocate_hcams(pinstance)) {
5093 pmcraid_err("could not alloc DMA memory for HCAMS\n");
5094 pmcraid_release_config_buffers(pinstance);
5102 * pmcraid_init_tasklets - registers tasklets for response handling
5104 * @pinstance: pointer adapter instance structure
5109 static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
5112 for (i = 0; i < pinstance->num_hrrq; i++)
5113 tasklet_init(&pinstance->isr_tasklet[i],
5114 pmcraid_tasklet_function,
5115 (unsigned long)&pinstance->hrrq_vector[i]);
5119 * pmcraid_kill_tasklets - destroys tasklets registered for response handling
5121 * @pinstance: pointer to adapter instance structure
5126 static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
5129 for (i = 0; i < pinstance->num_hrrq; i++)
5130 tasklet_kill(&pinstance->isr_tasklet[i]);
5134 * pmcraid_release_buffers - release per-adapter buffers allocated
5136 * @pinstance: pointer to adapter soft state
5141 static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
5143 pmcraid_release_config_buffers(pinstance);
5144 pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
5145 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5146 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5148 if (pinstance->inq_data != NULL) {
5149 pci_free_consistent(pinstance->pdev,
5150 sizeof(struct pmcraid_inquiry_data),
5151 pinstance->inq_data,
5152 pinstance->inq_data_baddr);
5154 pinstance->inq_data = NULL;
5155 pinstance->inq_data_baddr = 0;
5158 if (pinstance->timestamp_data != NULL) {
5159 pci_free_consistent(pinstance->pdev,
5160 sizeof(struct pmcraid_timestamp_data),
5161 pinstance->timestamp_data,
5162 pinstance->timestamp_data_baddr);
5164 pinstance->timestamp_data = NULL;
5165 pinstance->timestamp_data_baddr = 0;
5170 * pmcraid_init_buffers - allocates memory and initializes various structures
5171 * @pinstance: pointer to per adapter instance structure
5173 * This routine pre-allocates memory based on the type of block as below:
5174 * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
5175 * IOARCBs(PMCRAID_MAX_CMD) : DMAable memory, using pci pool allocator
5176 * config-table entries : DMAable memory using pci_alloc_consistent
5177 * HostRRQs : DMAable memory, using pci_alloc_consistent
5180 * 0 in case all of the blocks are allocated, -ENOMEM otherwise.
5182 static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
5186 if (pmcraid_allocate_host_rrqs(pinstance)) {
5187 pmcraid_err("couldn't allocate memory for %d host rrqs\n",
5188 pinstance->num_hrrq);
5192 if (pmcraid_allocate_config_buffers(pinstance)) {
5193 pmcraid_err("couldn't allocate memory for config buffers\n");
5194 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5198 if (pmcraid_allocate_cmd_blocks(pinstance)) {
5199 pmcraid_err("couldn't allocate memory for cmd blocks\n");
5200 pmcraid_release_config_buffers(pinstance);
5201 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5205 if (pmcraid_allocate_control_blocks(pinstance)) {
5206 pmcraid_err("couldn't allocate memory control blocks\n");
5207 pmcraid_release_config_buffers(pinstance);
5208 pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
5209 pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
5213 /* allocate DMAable memory for page D0 INQUIRY buffer */
5214 pinstance->inq_data = pci_alloc_consistent(
5216 sizeof(struct pmcraid_inquiry_data),
5217 &pinstance->inq_data_baddr);
5219 if (pinstance->inq_data == NULL) {
5220 pmcraid_err("couldn't allocate DMA memory for INQUIRY\n");
5221 pmcraid_release_buffers(pinstance);
5225 /* allocate DMAable memory for set timestamp data buffer */
5226 pinstance->timestamp_data = pci_alloc_consistent(
5228 sizeof(struct pmcraid_timestamp_data),
5229 &pinstance->timestamp_data_baddr);
5231 if (pinstance->timestamp_data == NULL) {
5232 pmcraid_err("couldn't allocate DMA memory for \
5233 set time_stamp \n");
5234 pmcraid_release_buffers(pinstance);
5239 /* Initialize all the command blocks and add them to free pool. No
5240 * need to lock (free_pool_lock) as this is done in initialization
5243 for (i = 0; i < PMCRAID_MAX_CMD; i++) {
5244 struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
5245 pmcraid_init_cmdblk(cmdp, i);
5246 cmdp->drv_inst = pinstance;
5247 list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
5254 * pmcraid_reinit_buffers - resets various buffer pointers
5255 * @pinstance: pointer to adapter instance
5259 static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
5262 int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
5264 for (i = 0; i < pinstance->num_hrrq; i++) {
5265 memset(pinstance->hrrq_start[i], 0, buffer_size);
5266 pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
5267 pinstance->hrrq_end[i] =
5268 pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
5269 pinstance->host_toggle_bit[i] = 1;
5274 * pmcraid_init_instance - initialize per instance data structure
5275 * @pdev: pointer to pci device structure
5276 * @host: pointer to Scsi_Host structure
5277 * @mapped_pci_addr: memory mapped IOA configuration registers
5280 * 0 on success, non-zero in case of any failure
5282 static int __devinit pmcraid_init_instance(
5283 struct pci_dev *pdev,
5284 struct Scsi_Host *host,
5285 void __iomem *mapped_pci_addr
5288 struct pmcraid_instance *pinstance =
5289 (struct pmcraid_instance *)host->hostdata;
5291 pinstance->host = host;
5292 pinstance->pdev = pdev;
5294 /* Initialize register addresses */
5295 pinstance->mapped_dma_addr = mapped_pci_addr;
5297 /* Initialize chip-specific details */
5299 struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
5300 struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
5302 pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
5304 pint_regs->ioa_host_interrupt_reg =
5305 mapped_pci_addr + chip_cfg->ioa_host_intr;
5306 pint_regs->ioa_host_interrupt_clr_reg =
5307 mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
5308 pint_regs->ioa_host_msix_interrupt_reg =
5309 mapped_pci_addr + chip_cfg->ioa_host_msix_intr;
5310 pint_regs->host_ioa_interrupt_reg =
5311 mapped_pci_addr + chip_cfg->host_ioa_intr;
5312 pint_regs->host_ioa_interrupt_clr_reg =
5313 mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
5315 /* Current version of firmware exposes interrupt mask set
5316 * and mask clr registers through memory mapped bar0.
5318 pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
5319 pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
5320 pint_regs->ioa_host_interrupt_mask_reg =
5321 mapped_pci_addr + chip_cfg->ioa_host_mask;
5322 pint_regs->ioa_host_interrupt_mask_clr_reg =
5323 mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
5324 pint_regs->global_interrupt_mask_reg =
5325 mapped_pci_addr + chip_cfg->global_intr_mask;
5328 pinstance->ioa_reset_attempts = 0;
5329 init_waitqueue_head(&pinstance->reset_wait_q);
5331 atomic_set(&pinstance->outstanding_cmds, 0);
5332 atomic_set(&pinstance->last_message_id, 0);
5333 atomic_set(&pinstance->expose_resources, 0);
5335 INIT_LIST_HEAD(&pinstance->free_res_q);
5336 INIT_LIST_HEAD(&pinstance->used_res_q);
5337 INIT_LIST_HEAD(&pinstance->free_cmd_pool);
5338 INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
5340 spin_lock_init(&pinstance->free_pool_lock);
5341 spin_lock_init(&pinstance->pending_pool_lock);
5342 spin_lock_init(&pinstance->resource_lock);
5343 mutex_init(&pinstance->aen_queue_lock);
5345 /* Work-queue (Shared) for deferred processing error handling */
5346 INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
5348 /* Initialize the default log_level */
5349 pinstance->current_log_level = pmcraid_log_level;
5351 /* Setup variables required for reset engine */
5352 pinstance->ioa_state = IOA_STATE_UNKNOWN;
5353 pinstance->reset_cmd = NULL;
5358 * pmcraid_shutdown - shutdown adapter controller.
5359 * @pdev: pci device struct
5361 * Issues an adapter shutdown to the card waits for its completion
5366 static void pmcraid_shutdown(struct pci_dev *pdev)
5368 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5369 pmcraid_reset_bringdown(pinstance);
5374 * pmcraid_get_minor - returns unused minor number from minor number bitmap
5376 static unsigned short pmcraid_get_minor(void)
5380 minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
5381 __set_bit(minor, pmcraid_minor);
5386 * pmcraid_release_minor - releases given minor back to minor number bitmap
5388 static void pmcraid_release_minor(unsigned short minor)
5390 __clear_bit(minor, pmcraid_minor);
5394 * pmcraid_setup_chrdev - allocates a minor number and registers a char device
5396 * @pinstance: pointer to adapter instance for which to register device
5399 * 0 in case of success, otherwise non-zero
5401 static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
5406 minor = pmcraid_get_minor();
5407 cdev_init(&pinstance->cdev, &pmcraid_fops);
5408 pinstance->cdev.owner = THIS_MODULE;
5410 error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
5413 pmcraid_release_minor(minor);
5415 device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
5416 NULL, "%s%u", PMCRAID_DEVFILE, minor);
5421 * pmcraid_release_chrdev - unregisters per-adapter management interface
5423 * @pinstance: pointer to adapter instance structure
5428 static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
5430 pmcraid_release_minor(MINOR(pinstance->cdev.dev));
5431 device_destroy(pmcraid_class,
5432 MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
5433 cdev_del(&pinstance->cdev);
5437 * pmcraid_remove - IOA hot plug remove entry point
5438 * @pdev: pci device struct
5443 static void __devexit pmcraid_remove(struct pci_dev *pdev)
5445 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5447 /* remove the management interface (/dev file) for this device */
5448 pmcraid_release_chrdev(pinstance);
5450 /* remove host template from scsi midlayer */
5451 scsi_remove_host(pinstance->host);
5453 /* block requests from mid-layer */
5454 scsi_block_requests(pinstance->host);
5456 /* initiate shutdown adapter */
5457 pmcraid_shutdown(pdev);
5459 pmcraid_disable_interrupts(pinstance, ~0);
5460 flush_scheduled_work();
5462 pmcraid_kill_tasklets(pinstance);
5463 pmcraid_unregister_interrupt_handler(pinstance);
5464 pmcraid_release_buffers(pinstance);
5465 iounmap(pinstance->mapped_dma_addr);
5466 pci_release_regions(pdev);
5467 scsi_host_put(pinstance->host);
5468 pci_disable_device(pdev);
5475 * pmcraid_suspend - driver suspend entry point for power management
5476 * @pdev: PCI device structure
5477 * @state: PCI power state to suspend routine
5479 * Return Value - 0 always
5481 static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
5483 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5485 pmcraid_shutdown(pdev);
5486 pmcraid_disable_interrupts(pinstance, ~0);
5487 pmcraid_kill_tasklets(pinstance);
5488 pci_set_drvdata(pinstance->pdev, pinstance);
5489 pmcraid_unregister_interrupt_handler(pinstance);
5490 pci_save_state(pdev);
5491 pci_disable_device(pdev);
5492 pci_set_power_state(pdev, pci_choose_state(pdev, state));
5498 * pmcraid_resume - driver resume entry point PCI power management
5499 * @pdev: PCI device structure
5501 * Return Value - 0 in case of success. Error code in case of any failure
5503 static int pmcraid_resume(struct pci_dev *pdev)
5505 struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
5506 struct Scsi_Host *host = pinstance->host;
5509 pci_set_power_state(pdev, PCI_D0);
5510 pci_enable_wake(pdev, PCI_D0, 0);
5511 pci_restore_state(pdev);
5513 rc = pci_enable_device(pdev);
5516 dev_err(&pdev->dev, "resume: Enable device failed\n");
5520 pci_set_master(pdev);
5522 if ((sizeof(dma_addr_t) == 4) ||
5523 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5524 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5527 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5530 dev_err(&pdev->dev, "resume: Failed to set PCI DMA mask\n");
5531 goto disable_device;
5534 pmcraid_disable_interrupts(pinstance, ~0);
5535 atomic_set(&pinstance->outstanding_cmds, 0);
5536 rc = pmcraid_register_interrupt_handler(pinstance);
5540 "resume: couldn't register interrupt handlers\n");
5545 pmcraid_init_tasklets(pinstance);
5546 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
5548 /* Start with hard reset sequence which brings up IOA to operational
5549 * state as well as completes the reset sequence.
5551 pinstance->ioa_hard_reset = 1;
5553 /* Start IOA firmware initialization and bring card to Operational
5556 if (pmcraid_reset_bringup(pinstance)) {
5557 dev_err(&pdev->dev, "couldn't initialize IOA\n");
5559 goto release_tasklets;
5565 pmcraid_disable_interrupts(pinstance, ~0);
5566 pmcraid_kill_tasklets(pinstance);
5567 pmcraid_unregister_interrupt_handler(pinstance);
5570 scsi_host_put(host);
5573 pci_disable_device(pdev);
5580 #define pmcraid_suspend NULL
5581 #define pmcraid_resume NULL
5583 #endif /* CONFIG_PM */
5586 * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
5587 * completion of the ioa reset
5588 * @cmd: pointer to reset command block
5590 static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
5592 struct pmcraid_instance *pinstance = cmd->drv_inst;
5593 unsigned long flags;
5595 spin_lock_irqsave(pinstance->host->host_lock, flags);
5596 pmcraid_ioa_reset(cmd);
5597 spin_unlock_irqrestore(pinstance->host->host_lock, flags);
5598 scsi_unblock_requests(pinstance->host);
5599 schedule_work(&pinstance->worker_q);
5603 * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
5605 * @cmd: pointer to pmcraid_cmd structure
5608 * 0 for success or non-zero for failure cases
5610 static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
5612 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5613 void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
5615 pmcraid_reinit_cmdblk(cmd);
5617 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5618 ioarcb->request_type = REQ_TYPE_IOACMD;
5619 ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
5620 ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
5622 /* If this was called as part of resource table reinitialization due to
5623 * lost CCN, it is enough to return the command block back to free pool
5624 * as part of set_supported_devs completion function.
5626 if (cmd->drv_inst->reinit_cfg_table) {
5627 cmd->drv_inst->reinit_cfg_table = 0;
5629 cmd_done = pmcraid_reinit_cfgtable_done;
5632 /* we will be done with the reset sequence after set supported devices,
5633 * setup the done function to return the command block back to free
5636 pmcraid_send_cmd(cmd,
5638 PMCRAID_SET_SUP_DEV_TIMEOUT,
5639 pmcraid_timeout_handler);
5644 * pmcraid_set_timestamp - set the timestamp to IOAFP
5646 * @cmd: pointer to pmcraid_cmd structure
5649 * 0 for success or non-zero for failure cases
5651 static void pmcraid_set_timestamp(struct pmcraid_cmd *cmd)
5653 struct pmcraid_instance *pinstance = cmd->drv_inst;
5654 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5655 __be32 time_stamp_len = cpu_to_be32(PMCRAID_TIMESTAMP_LEN);
5656 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5661 do_gettimeofday(&tv);
5662 timestamp = tv.tv_sec * 1000;
5664 pinstance->timestamp_data->timestamp[0] = (__u8)(timestamp);
5665 pinstance->timestamp_data->timestamp[1] = (__u8)((timestamp) >> 8);
5666 pinstance->timestamp_data->timestamp[2] = (__u8)((timestamp) >> 16);
5667 pinstance->timestamp_data->timestamp[3] = (__u8)((timestamp) >> 24);
5668 pinstance->timestamp_data->timestamp[4] = (__u8)((timestamp) >> 32);
5669 pinstance->timestamp_data->timestamp[5] = (__u8)((timestamp) >> 40);
5671 pmcraid_reinit_cmdblk(cmd);
5672 ioarcb->request_type = REQ_TYPE_SCSI;
5673 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5674 ioarcb->cdb[0] = PMCRAID_SCSI_SET_TIMESTAMP;
5675 ioarcb->cdb[1] = PMCRAID_SCSI_SERVICE_ACTION;
5676 memcpy(&(ioarcb->cdb[6]), &time_stamp_len, sizeof(time_stamp_len));
5678 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5679 offsetof(struct pmcraid_ioarcb,
5680 add_data.u.ioadl[0]));
5681 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5682 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5684 ioarcb->request_flags0 |= NO_LINK_DESCS;
5685 ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
5686 ioarcb->data_transfer_length =
5687 cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5688 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5689 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5690 ioadl->address = cpu_to_le64(pinstance->timestamp_data_baddr);
5691 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_timestamp_data));
5693 if (!pinstance->timestamp_error) {
5694 pinstance->timestamp_error = 0;
5695 pmcraid_send_cmd(cmd, pmcraid_set_supported_devs,
5696 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5698 pmcraid_send_cmd(cmd, pmcraid_return_cmd,
5699 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5706 * pmcraid_init_res_table - Initialize the resource table
5707 * @cmd: pointer to pmcraid command struct
5709 * This function looks through the existing resource table, comparing
5710 * it with the config table. This function will take care of old/new
5711 * devices and schedule adding/removing them from the mid-layer
5717 static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
5719 struct pmcraid_instance *pinstance = cmd->drv_inst;
5720 struct pmcraid_resource_entry *res, *temp;
5721 struct pmcraid_config_table_entry *cfgte;
5722 unsigned long lock_flags;
5727 if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
5728 pmcraid_err("IOA requires microcode download\n");
5730 fw_version = be16_to_cpu(pinstance->inq_data->fw_version);
5732 /* resource list is protected by pinstance->resource_lock.
5733 * init_res_table can be called from probe (user-thread) or runtime
5734 * reset (timer/tasklet)
5736 spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
5738 list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
5739 list_move_tail(&res->queue, &old_res);
5741 for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
5742 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5743 PMCRAID_FW_VERSION_1)
5744 cfgte = &pinstance->cfg_table->entries[i];
5746 cfgte = (struct pmcraid_config_table_entry *)
5747 &pinstance->cfg_table->entries_ext[i];
5749 if (!pmcraid_expose_resource(fw_version, cfgte))
5754 /* If this entry was already detected and initialized */
5755 list_for_each_entry_safe(res, temp, &old_res, queue) {
5757 rc = memcmp(&res->cfg_entry.resource_address,
5758 &cfgte->resource_address,
5759 sizeof(cfgte->resource_address));
5761 list_move_tail(&res->queue,
5762 &pinstance->used_res_q);
5768 /* If this is new entry, initialize it and add it the queue */
5771 if (list_empty(&pinstance->free_res_q)) {
5772 pmcraid_err("Too many devices attached\n");
5777 res = list_entry(pinstance->free_res_q.next,
5778 struct pmcraid_resource_entry, queue);
5780 res->scsi_dev = NULL;
5781 res->change_detected = RES_CHANGE_ADD;
5782 res->reset_progress = 0;
5783 list_move_tail(&res->queue, &pinstance->used_res_q);
5786 /* copy new configuration table entry details into driver
5787 * maintained resource entry
5790 memcpy(&res->cfg_entry, cfgte,
5791 pinstance->config_table_entry_size);
5792 pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
5793 res->cfg_entry.resource_type,
5794 (fw_version <= PMCRAID_FW_VERSION_1 ?
5795 res->cfg_entry.unique_flags1 :
5796 res->cfg_entry.array_id & 0xFF),
5797 le32_to_cpu(res->cfg_entry.resource_address));
5801 /* Detect any deleted entries, mark them for deletion from mid-layer */
5802 list_for_each_entry_safe(res, temp, &old_res, queue) {
5804 if (res->scsi_dev) {
5805 res->change_detected = RES_CHANGE_DEL;
5806 res->cfg_entry.resource_handle =
5807 PMCRAID_INVALID_RES_HANDLE;
5808 list_move_tail(&res->queue, &pinstance->used_res_q);
5810 list_move_tail(&res->queue, &pinstance->free_res_q);
5814 /* release the resource list lock */
5815 spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
5816 pmcraid_set_timestamp(cmd);
5820 * pmcraid_querycfg - Send a Query IOA Config to the adapter.
5821 * @cmd: pointer pmcraid_cmd struct
5823 * This function sends a Query IOA Configuration command to the adapter to
5824 * retrieve the IOA configuration table.
5829 static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
5831 struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
5832 struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
5833 struct pmcraid_instance *pinstance = cmd->drv_inst;
5834 int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
5836 if (be16_to_cpu(pinstance->inq_data->fw_version) <=
5837 PMCRAID_FW_VERSION_1)
5838 pinstance->config_table_entry_size =
5839 sizeof(struct pmcraid_config_table_entry);
5841 pinstance->config_table_entry_size =
5842 sizeof(struct pmcraid_config_table_entry_ext);
5844 ioarcb->request_type = REQ_TYPE_IOACMD;
5845 ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
5847 ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
5849 /* firmware requires 4-byte length field, specified in B.E format */
5850 memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
5852 /* Since entire config table can be described by single IOADL, it can
5853 * be part of IOARCB itself
5855 ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
5856 offsetof(struct pmcraid_ioarcb,
5857 add_data.u.ioadl[0]));
5858 ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
5859 ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
5861 ioarcb->request_flags0 |= NO_LINK_DESCS;
5862 ioarcb->data_transfer_length =
5863 cpu_to_le32(sizeof(struct pmcraid_config_table));
5865 ioadl = &(ioarcb->add_data.u.ioadl[0]);
5866 ioadl->flags = IOADL_FLAGS_LAST_DESC;
5867 ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
5868 ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
5870 pmcraid_send_cmd(cmd, pmcraid_init_res_table,
5871 PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
5876 * pmcraid_probe - PCI probe entry pointer for PMC MaxRAID controller driver
5877 * @pdev: pointer to pci device structure
5878 * @dev_id: pointer to device ids structure
5881 * returns 0 if the device is claimed and successfully configured.
5882 * returns non-zero error code in case of any failure
5884 static int __devinit pmcraid_probe(
5885 struct pci_dev *pdev,
5886 const struct pci_device_id *dev_id
5889 struct pmcraid_instance *pinstance;
5890 struct Scsi_Host *host;
5891 void __iomem *mapped_pci_addr;
5892 int rc = PCIBIOS_SUCCESSFUL;
5894 if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
5896 ("maximum number(%d) of supported adapters reached\n",
5897 atomic_read(&pmcraid_adapter_count));
5901 atomic_inc(&pmcraid_adapter_count);
5902 rc = pci_enable_device(pdev);
5905 dev_err(&pdev->dev, "Cannot enable adapter\n");
5906 atomic_dec(&pmcraid_adapter_count);
5910 dev_info(&pdev->dev,
5911 "Found new IOA(%x:%x), Total IOA count: %d\n",
5912 pdev->vendor, pdev->device,
5913 atomic_read(&pmcraid_adapter_count));
5915 rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
5919 "Couldn't register memory range of registers\n");
5920 goto out_disable_device;
5923 mapped_pci_addr = pci_iomap(pdev, 0, 0);
5925 if (!mapped_pci_addr) {
5926 dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
5928 goto out_release_regions;
5931 pci_set_master(pdev);
5933 /* Firmware requires the system bus address of IOARCB to be within
5934 * 32-bit addressable range though it has 64-bit IOARRIN register.
5935 * However, firmware supports 64-bit streaming DMA buffers, whereas
5936 * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
5937 * returns memory within 4GB (if not, change this logic), coherent
5938 * buffers are within firmware acceptible address ranges.
5940 if ((sizeof(dma_addr_t) == 4) ||
5941 pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
5942 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5944 /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
5945 * bit mask for pci_alloc_consistent to return addresses within 4GB
5948 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5951 dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
5955 host = scsi_host_alloc(&pmcraid_host_template,
5956 sizeof(struct pmcraid_instance));
5959 dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
5964 host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
5965 host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
5966 host->unique_id = host->host_no;
5967 host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
5968 host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
5970 /* zero out entire instance structure */
5971 pinstance = (struct pmcraid_instance *)host->hostdata;
5972 memset(pinstance, 0, sizeof(*pinstance));
5974 pinstance->chip_cfg =
5975 (struct pmcraid_chip_details *)(dev_id->driver_data);
5977 rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
5980 dev_err(&pdev->dev, "failed to initialize adapter instance\n");
5981 goto out_scsi_host_put;
5984 pci_set_drvdata(pdev, pinstance);
5986 /* Save PCI config-space for use following the reset */
5987 rc = pci_save_state(pinstance->pdev);
5990 dev_err(&pdev->dev, "Failed to save PCI config space\n");
5991 goto out_scsi_host_put;
5994 pmcraid_disable_interrupts(pinstance, ~0);
5996 rc = pmcraid_register_interrupt_handler(pinstance);
5999 dev_err(&pdev->dev, "couldn't register interrupt handler\n");
6000 goto out_scsi_host_put;
6003 pmcraid_init_tasklets(pinstance);
6005 /* allocate verious buffers used by LLD.*/
6006 rc = pmcraid_init_buffers(pinstance);
6009 pmcraid_err("couldn't allocate memory blocks\n");
6010 goto out_unregister_isr;
6013 /* check the reset type required */
6014 pmcraid_reset_type(pinstance);
6016 pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
6018 /* Start IOA firmware initialization and bring card to Operational
6021 pmcraid_info("starting IOA initialization sequence\n");
6022 if (pmcraid_reset_bringup(pinstance)) {
6023 dev_err(&pdev->dev, "couldn't initialize IOA\n");
6025 goto out_release_bufs;
6028 /* Add adapter instance into mid-layer list */
6029 rc = scsi_add_host(pinstance->host, &pdev->dev);
6031 pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
6032 goto out_release_bufs;
6035 scsi_scan_host(pinstance->host);
6037 rc = pmcraid_setup_chrdev(pinstance);
6040 pmcraid_err("couldn't create mgmt interface, error: %x\n",
6042 goto out_remove_host;
6045 /* Schedule worker thread to handle CCN and take care of adding and
6046 * removing devices to OS
6048 atomic_set(&pinstance->expose_resources, 1);
6049 schedule_work(&pinstance->worker_q);
6053 scsi_remove_host(host);
6056 pmcraid_release_buffers(pinstance);
6059 pmcraid_kill_tasklets(pinstance);
6060 pmcraid_unregister_interrupt_handler(pinstance);
6063 scsi_host_put(host);
6066 iounmap(mapped_pci_addr);
6068 out_release_regions:
6069 pci_release_regions(pdev);
6072 atomic_dec(&pmcraid_adapter_count);
6073 pci_set_drvdata(pdev, NULL);
6074 pci_disable_device(pdev);
6079 * PCI driver structure of pcmraid driver
6081 static struct pci_driver pmcraid_driver = {
6082 .name = PMCRAID_DRIVER_NAME,
6083 .id_table = pmcraid_pci_table,
6084 .probe = pmcraid_probe,
6085 .remove = pmcraid_remove,
6086 .suspend = pmcraid_suspend,
6087 .resume = pmcraid_resume,
6088 .shutdown = pmcraid_shutdown
6092 * pmcraid_init - module load entry point
6094 static int __init pmcraid_init(void)
6099 pmcraid_info("%s Device Driver version: %s %s\n",
6100 PMCRAID_DRIVER_NAME,
6101 PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
6103 error = alloc_chrdev_region(&dev, 0,
6104 PMCRAID_MAX_ADAPTERS,
6108 pmcraid_err("failed to get a major number for adapters\n");
6112 pmcraid_major = MAJOR(dev);
6113 pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
6115 if (IS_ERR(pmcraid_class)) {
6116 error = PTR_ERR(pmcraid_class);
6117 pmcraid_err("failed to register with with sysfs, error = %x\n",
6119 goto out_unreg_chrdev;
6122 error = pmcraid_netlink_init();
6125 goto out_unreg_chrdev;
6127 error = pci_register_driver(&pmcraid_driver);
6132 pmcraid_err("failed to register pmcraid driver, error = %x\n",
6134 class_destroy(pmcraid_class);
6135 pmcraid_netlink_release();
6138 unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
6145 * pmcraid_exit - module unload entry point
6147 static void __exit pmcraid_exit(void)
6149 pmcraid_netlink_release();
6150 unregister_chrdev_region(MKDEV(pmcraid_major, 0),
6151 PMCRAID_MAX_ADAPTERS);
6152 pci_unregister_driver(&pmcraid_driver);
6153 class_destroy(pmcraid_class);
6156 module_init(pmcraid_init);
6157 module_exit(pmcraid_exit);