3 * Linux MegaRAID driver for SAS based RAID controllers
5 * Copyright (c) 2003-2005 LSI Logic Corporation.
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
12 * FILE : megaraid_sas.c
13 * Version : v00.00.02.04
16 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
17 * Sumant Patro <Sumant.Patro@lsil.com>
19 * List of supported controllers
21 * OEM Product Name VID DID SSVID SSID
22 * --- ------------ --- --- ---- ----
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/pci.h>
28 #include <linux/list.h>
29 #include <linux/moduleparam.h>
30 #include <linux/module.h>
31 #include <linux/spinlock.h>
32 #include <linux/interrupt.h>
33 #include <linux/delay.h>
34 #include <linux/uio.h>
35 #include <asm/uaccess.h>
37 #include <linux/compat.h>
38 #include <linux/mutex.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_host.h>
44 #include "megaraid_sas.h"
46 MODULE_LICENSE("GPL");
47 MODULE_VERSION(MEGASAS_VERSION);
48 MODULE_AUTHOR("sreenivas.bagalkote@lsil.com");
49 MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver");
52 * PCI ID table for all supported controllers
54 static struct pci_device_id megasas_pci_table[] = {
57 PCI_VENDOR_ID_LSI_LOGIC,
58 PCI_DEVICE_ID_LSI_SAS1064R, // xscale IOP
63 PCI_VENDOR_ID_LSI_LOGIC,
64 PCI_DEVICE_ID_LSI_SAS1078R, // ppc IOP
70 PCI_DEVICE_ID_DELL_PERC5, // xscale IOP
74 {0} /* Terminating entry */
77 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
79 static int megasas_mgmt_majorno;
80 static struct megasas_mgmt_info megasas_mgmt_info;
81 static struct fasync_struct *megasas_async_queue;
82 static DEFINE_MUTEX(megasas_async_queue_mutex);
85 * megasas_get_cmd - Get a command from the free pool
86 * @instance: Adapter soft state
88 * Returns a free command from the pool
90 static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
94 struct megasas_cmd *cmd = NULL;
96 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
98 if (!list_empty(&instance->cmd_pool)) {
99 cmd = list_entry((&instance->cmd_pool)->next,
100 struct megasas_cmd, list);
101 list_del_init(&cmd->list);
103 printk(KERN_ERR "megasas: Command pool empty!\n");
106 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
111 * megasas_return_cmd - Return a cmd to free command pool
112 * @instance: Adapter soft state
113 * @cmd: Command packet to be returned to free command pool
116 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
120 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
123 list_add_tail(&cmd->list, &instance->cmd_pool);
125 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
130 * The following functions are defined for xscale
131 * (deviceid : 1064R, PERC5) controllers
135 * megasas_enable_intr_xscale - Enables interrupts
136 * @regs: MFI register set
139 megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
141 writel(1, &(regs)->outbound_intr_mask);
143 /* Dummy readl to force pci flush */
144 readl(®s->outbound_intr_mask);
148 * megasas_read_fw_status_reg_xscale - returns the current FW status value
149 * @regs: MFI register set
152 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
154 return readl(&(regs)->outbound_msg_0);
157 * megasas_clear_interrupt_xscale - Check & clear interrupt
158 * @regs: MFI register set
161 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
165 * Check if it is our interrupt
167 status = readl(®s->outbound_intr_status);
169 if (!(status & MFI_OB_INTR_STATUS_MASK)) {
174 * Clear the interrupt by writing back the same value
176 writel(status, ®s->outbound_intr_status);
182 * megasas_fire_cmd_xscale - Sends command to the FW
183 * @frame_phys_addr : Physical address of cmd
184 * @frame_count : Number of frames for the command
185 * @regs : MFI register set
188 megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs)
190 writel((frame_phys_addr >> 3)|(frame_count),
191 &(regs)->inbound_queue_port);
194 static struct megasas_instance_template megasas_instance_template_xscale = {
196 .fire_cmd = megasas_fire_cmd_xscale,
197 .enable_intr = megasas_enable_intr_xscale,
198 .clear_intr = megasas_clear_intr_xscale,
199 .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
203 * This is the end of set of functions & definitions specific
204 * to xscale (deviceid : 1064R, PERC5) controllers
208 * The following functions are defined for ppc (deviceid : 0x60)
213 * megasas_enable_intr_ppc - Enables interrupts
214 * @regs: MFI register set
217 megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
219 writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
221 writel(~0x80000004, &(regs)->outbound_intr_mask);
223 /* Dummy readl to force pci flush */
224 readl(®s->outbound_intr_mask);
228 * megasas_read_fw_status_reg_ppc - returns the current FW status value
229 * @regs: MFI register set
232 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
234 return readl(&(regs)->outbound_scratch_pad);
238 * megasas_clear_interrupt_ppc - Check & clear interrupt
239 * @regs: MFI register set
242 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
246 * Check if it is our interrupt
248 status = readl(®s->outbound_intr_status);
250 if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) {
255 * Clear the interrupt by writing back the same value
257 writel(status, ®s->outbound_doorbell_clear);
262 * megasas_fire_cmd_ppc - Sends command to the FW
263 * @frame_phys_addr : Physical address of cmd
264 * @frame_count : Number of frames for the command
265 * @regs : MFI register set
268 megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs)
270 writel((frame_phys_addr | (frame_count<<1))|1,
271 &(regs)->inbound_queue_port);
274 static struct megasas_instance_template megasas_instance_template_ppc = {
276 .fire_cmd = megasas_fire_cmd_ppc,
277 .enable_intr = megasas_enable_intr_ppc,
278 .clear_intr = megasas_clear_intr_ppc,
279 .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
283 * This is the end of set of functions & definitions
284 * specific to ppc (deviceid : 0x60) controllers
288 * megasas_disable_intr - Disables interrupts
289 * @regs: MFI register set
292 megasas_disable_intr(struct megasas_register_set __iomem * regs)
295 writel(mask, ®s->outbound_intr_mask);
297 /* Dummy readl to force pci flush */
298 readl(®s->outbound_intr_mask);
302 * megasas_issue_polled - Issues a polling command
303 * @instance: Adapter soft state
304 * @cmd: Command packet to be issued
306 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
309 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
312 u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
314 struct megasas_header *frame_hdr = &cmd->frame->hdr;
316 frame_hdr->cmd_status = 0xFF;
317 frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
320 * Issue the frame using inbound queue port
322 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
325 * Wait for cmd_status to change
327 for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
332 if (frame_hdr->cmd_status == 0xff)
339 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
340 * @instance: Adapter soft state
341 * @cmd: Command to be issued
343 * This function waits on an event for the command to be returned from ISR.
344 * Used to issue ioctl commands.
347 megasas_issue_blocked_cmd(struct megasas_instance *instance,
348 struct megasas_cmd *cmd)
350 cmd->cmd_status = ENODATA;
352 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
354 wait_event(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA));
360 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
361 * @instance: Adapter soft state
362 * @cmd_to_abort: Previously issued cmd to be aborted
364 * MFI firmware can abort previously issued AEN comamnd (automatic event
365 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
366 * cmd and blocks till it is completed.
369 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
370 struct megasas_cmd *cmd_to_abort)
372 struct megasas_cmd *cmd;
373 struct megasas_abort_frame *abort_fr;
375 cmd = megasas_get_cmd(instance);
380 abort_fr = &cmd->frame->abort;
383 * Prepare and issue the abort frame
385 abort_fr->cmd = MFI_CMD_ABORT;
386 abort_fr->cmd_status = 0xFF;
388 abort_fr->abort_context = cmd_to_abort->index;
389 abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
390 abort_fr->abort_mfi_phys_addr_hi = 0;
393 cmd->cmd_status = 0xFF;
395 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
398 * Wait for this cmd to complete
400 wait_event(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF));
402 megasas_return_cmd(instance, cmd);
407 * megasas_make_sgl32 - Prepares 32-bit SGL
408 * @instance: Adapter soft state
409 * @scp: SCSI command from the mid-layer
410 * @mfi_sgl: SGL to be filled in
412 * If successful, this function returns the number of SG elements. Otherwise,
416 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
417 union megasas_sgl *mfi_sgl)
421 struct scatterlist *os_sgl;
424 * Return 0 if there is no data transfer
426 if (!scp->request_buffer || !scp->request_bufflen)
430 mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev,
437 mfi_sgl->sge32[0].length = scp->request_bufflen;
442 os_sgl = (struct scatterlist *)scp->request_buffer;
443 sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
444 scp->sc_data_direction);
446 for (i = 0; i < sge_count; i++, os_sgl++) {
447 mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
448 mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
455 * megasas_make_sgl64 - Prepares 64-bit SGL
456 * @instance: Adapter soft state
457 * @scp: SCSI command from the mid-layer
458 * @mfi_sgl: SGL to be filled in
460 * If successful, this function returns the number of SG elements. Otherwise,
464 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
465 union megasas_sgl *mfi_sgl)
469 struct scatterlist *os_sgl;
472 * Return 0 if there is no data transfer
474 if (!scp->request_buffer || !scp->request_bufflen)
478 mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev,
486 mfi_sgl->sge64[0].length = scp->request_bufflen;
491 os_sgl = (struct scatterlist *)scp->request_buffer;
492 sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
493 scp->sc_data_direction);
495 for (i = 0; i < sge_count; i++, os_sgl++) {
496 mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
497 mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
504 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
505 * @instance: Adapter soft state
507 * @cmd: Command to be prepared in
509 * This function prepares CDB commands. These are typcially pass-through
510 * commands to the devices.
513 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
514 struct megasas_cmd *cmd)
521 struct megasas_pthru_frame *pthru;
523 is_logical = MEGASAS_IS_LOGICAL(scp);
524 device_id = MEGASAS_DEV_INDEX(instance, scp);
525 pthru = (struct megasas_pthru_frame *)cmd->frame;
527 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
528 flags = MFI_FRAME_DIR_WRITE;
529 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
530 flags = MFI_FRAME_DIR_READ;
531 else if (scp->sc_data_direction == PCI_DMA_NONE)
532 flags = MFI_FRAME_DIR_NONE;
535 * Prepare the DCDB frame
537 pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
538 pthru->cmd_status = 0x0;
539 pthru->scsi_status = 0x0;
540 pthru->target_id = device_id;
541 pthru->lun = scp->device->lun;
542 pthru->cdb_len = scp->cmd_len;
544 pthru->flags = flags;
545 pthru->data_xfer_len = scp->request_bufflen;
547 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
552 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
553 sizeof(struct megasas_sge32);
556 pthru->flags |= MFI_FRAME_SGL64;
557 pthru->sge_count = megasas_make_sgl64(instance, scp,
560 pthru->sge_count = megasas_make_sgl32(instance, scp,
564 * Sense info specific
566 pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
567 pthru->sense_buf_phys_addr_hi = 0;
568 pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
570 sge_bytes = sge_sz * pthru->sge_count;
573 * Compute the total number of frames this command consumes. FW uses
574 * this number to pull sufficient number of frames from host memory.
576 cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
577 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
579 if (cmd->frame_count > 7)
580 cmd->frame_count = 8;
582 return cmd->frame_count;
586 * megasas_build_ldio - Prepares IOs to logical devices
587 * @instance: Adapter soft state
589 * @cmd: Command to to be prepared
591 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
594 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
595 struct megasas_cmd *cmd)
600 u8 sc = scp->cmnd[0];
602 struct megasas_io_frame *ldio;
604 device_id = MEGASAS_DEV_INDEX(instance, scp);
605 ldio = (struct megasas_io_frame *)cmd->frame;
607 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
608 flags = MFI_FRAME_DIR_WRITE;
609 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
610 flags = MFI_FRAME_DIR_READ;
613 * Preare the Logical IO frame: 2nd bit is zero for all read cmds
615 ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
616 ldio->cmd_status = 0x0;
617 ldio->scsi_status = 0x0;
618 ldio->target_id = device_id;
620 ldio->reserved_0 = 0;
623 ldio->start_lba_hi = 0;
624 ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
627 * 6-byte READ(0x08) or WRITE(0x0A) cdb
629 if (scp->cmd_len == 6) {
630 ldio->lba_count = (u32) scp->cmnd[4];
631 ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
632 ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
634 ldio->start_lba_lo &= 0x1FFFFF;
638 * 10-byte READ(0x28) or WRITE(0x2A) cdb
640 else if (scp->cmd_len == 10) {
641 ldio->lba_count = (u32) scp->cmnd[8] |
642 ((u32) scp->cmnd[7] << 8);
643 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
644 ((u32) scp->cmnd[3] << 16) |
645 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
649 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
651 else if (scp->cmd_len == 12) {
652 ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
653 ((u32) scp->cmnd[7] << 16) |
654 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
656 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
657 ((u32) scp->cmnd[3] << 16) |
658 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
662 * 16-byte READ(0x88) or WRITE(0x8A) cdb
664 else if (scp->cmd_len == 16) {
665 ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
666 ((u32) scp->cmnd[11] << 16) |
667 ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
669 ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
670 ((u32) scp->cmnd[7] << 16) |
671 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
673 ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
674 ((u32) scp->cmnd[3] << 16) |
675 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
682 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
683 sizeof(struct megasas_sge32);
686 ldio->flags |= MFI_FRAME_SGL64;
687 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
689 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
692 * Sense info specific
694 ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
695 ldio->sense_buf_phys_addr_hi = 0;
696 ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
698 sge_bytes = sge_sz * ldio->sge_count;
700 cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
701 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
703 if (cmd->frame_count > 7)
704 cmd->frame_count = 8;
706 return cmd->frame_count;
710 * megasas_is_ldio - Checks if the cmd is for logical drive
711 * @scmd: SCSI command
713 * Called by megasas_queue_command to find out if the command to be queued
714 * is a logical drive command
716 static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
718 if (!MEGASAS_IS_LOGICAL(cmd))
720 switch (cmd->cmnd[0]) {
736 * megasas_queue_command - Queue entry point
737 * @scmd: SCSI command to be queued
738 * @done: Callback entry point
741 megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
745 struct megasas_cmd *cmd;
746 struct megasas_instance *instance;
748 instance = (struct megasas_instance *)
749 scmd->device->host->hostdata;
750 scmd->scsi_done = done;
753 if (MEGASAS_IS_LOGICAL(scmd) &&
754 (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
755 scmd->result = DID_BAD_TARGET << 16;
759 cmd = megasas_get_cmd(instance);
761 return SCSI_MLQUEUE_HOST_BUSY;
764 * Logical drive command
766 if (megasas_is_ldio(scmd))
767 frame_count = megasas_build_ldio(instance, scmd, cmd);
769 frame_count = megasas_build_dcdb(instance, scmd, cmd);
775 scmd->SCp.ptr = (char *)cmd;
776 scmd->SCp.sent_command = jiffies;
779 * Issue the command to the FW
781 spin_lock_irqsave(&instance->instance_lock, flags);
782 instance->fw_outstanding++;
783 spin_unlock_irqrestore(&instance->instance_lock, flags);
785 instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set);
790 megasas_return_cmd(instance, cmd);
797 * megasas_wait_for_outstanding - Wait for all outstanding cmds
798 * @instance: Adapter soft state
800 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
801 * complete all its outstanding commands. Returns error if one or more IOs
802 * are pending after this time period. It also marks the controller dead.
804 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
807 u32 wait_time = MEGASAS_RESET_WAIT_TIME;
809 for (i = 0; i < wait_time; i++) {
811 if (!instance->fw_outstanding)
814 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
815 printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
816 "commands to complete\n", i,
817 instance->fw_outstanding);
823 if (instance->fw_outstanding) {
824 instance->hw_crit_error = 1;
832 * megasas_generic_reset - Generic reset routine
833 * @scmd: Mid-layer SCSI command
835 * This routine implements a generic reset handler for device, bus and host
836 * reset requests. Device, bus and host specific reset handlers can use this
837 * function after they do their specific tasks.
839 static int megasas_generic_reset(struct scsi_cmnd *scmd)
842 struct megasas_instance *instance;
844 instance = (struct megasas_instance *)scmd->device->host->hostdata;
846 scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n",
847 scmd->serial_number, scmd->cmnd[0]);
849 if (instance->hw_crit_error) {
850 printk(KERN_ERR "megasas: cannot recover from previous reset "
855 ret_val = megasas_wait_for_outstanding(instance);
856 if (ret_val == SUCCESS)
857 printk(KERN_NOTICE "megasas: reset successful \n");
859 printk(KERN_ERR "megasas: failed to do reset\n");
864 static enum scsi_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
866 unsigned long seconds;
869 seconds = (jiffies - scmd->SCp.sent_command) / HZ;
872 return EH_RESET_TIMER;
874 return EH_NOT_HANDLED;
882 * megasas_reset_device - Device reset handler entry point
884 static int megasas_reset_device(struct scsi_cmnd *scmd)
889 * First wait for all commands to complete
891 ret = megasas_generic_reset(scmd);
897 * megasas_reset_bus_host - Bus & host reset handler entry point
899 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
904 * Frist wait for all commands to complete
906 ret = megasas_generic_reset(scmd);
912 * megasas_service_aen - Processes an event notification
913 * @instance: Adapter soft state
914 * @cmd: AEN command completed by the ISR
916 * For AEN, driver sends a command down to FW that is held by the FW till an
917 * event occurs. When an event of interest occurs, FW completes the command
918 * that it was previously holding.
920 * This routines sends SIGIO signal to processes that have registered with the
924 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
927 * Don't signal app if it is just an aborted previously registered aen
930 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
934 instance->aen_cmd = NULL;
935 megasas_return_cmd(instance, cmd);
939 * Scsi host template for megaraid_sas driver
941 static struct scsi_host_template megasas_template = {
943 .module = THIS_MODULE,
944 .name = "LSI Logic SAS based MegaRAID driver",
945 .proc_name = "megaraid_sas",
946 .queuecommand = megasas_queue_command,
947 .eh_device_reset_handler = megasas_reset_device,
948 .eh_bus_reset_handler = megasas_reset_bus_host,
949 .eh_host_reset_handler = megasas_reset_bus_host,
950 .eh_timed_out = megasas_reset_timer,
951 .use_clustering = ENABLE_CLUSTERING,
955 * megasas_complete_int_cmd - Completes an internal command
956 * @instance: Adapter soft state
957 * @cmd: Command to be completed
959 * The megasas_issue_blocked_cmd() function waits for a command to complete
960 * after it issues a command. This function wakes up that waiting routine by
961 * calling wake_up() on the wait queue.
964 megasas_complete_int_cmd(struct megasas_instance *instance,
965 struct megasas_cmd *cmd)
967 cmd->cmd_status = cmd->frame->io.cmd_status;
969 if (cmd->cmd_status == ENODATA) {
972 wake_up(&instance->int_cmd_wait_q);
976 * megasas_complete_abort - Completes aborting a command
977 * @instance: Adapter soft state
978 * @cmd: Cmd that was issued to abort another cmd
980 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
981 * after it issues an abort on a previously issued command. This function
982 * wakes up all functions waiting on the same wait queue.
985 megasas_complete_abort(struct megasas_instance *instance,
986 struct megasas_cmd *cmd)
991 wake_up(&instance->abort_cmd_wait_q);
998 * megasas_unmap_sgbuf - Unmap SG buffers
999 * @instance: Adapter soft state
1000 * @cmd: Completed command
1003 megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd)
1008 if (cmd->scmd->use_sg) {
1009 pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer,
1010 cmd->scmd->use_sg, cmd->scmd->sc_data_direction);
1014 if (!cmd->scmd->request_bufflen)
1017 opcode = cmd->frame->hdr.cmd;
1019 if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) {
1021 buf_h = cmd->frame->io.sgl.sge64[0].phys_addr;
1023 buf_h = cmd->frame->io.sgl.sge32[0].phys_addr;
1026 buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr;
1028 buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr;
1031 pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen,
1032 cmd->scmd->sc_data_direction);
1037 * megasas_complete_cmd - Completes a command
1038 * @instance: Adapter soft state
1039 * @cmd: Command to be completed
1040 * @alt_status: If non-zero, use this value as status to
1041 * SCSI mid-layer instead of the value returned
1042 * by the FW. This should be used if caller wants
1043 * an alternate status (as in the case of aborted
1047 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
1051 struct megasas_header *hdr = &cmd->frame->hdr;
1052 unsigned long flags;
1055 cmd->scmd->SCp.ptr = (char *)0;
1060 case MFI_CMD_PD_SCSI_IO:
1061 case MFI_CMD_LD_SCSI_IO:
1064 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
1065 * issued either through an IO path or an IOCTL path. If it
1066 * was via IOCTL, we will send it to internal completion.
1068 if (cmd->sync_cmd) {
1070 megasas_complete_int_cmd(instance, cmd);
1075 * Don't export physical disk devices to mid-layer.
1077 if (!MEGASAS_IS_LOGICAL(cmd->scmd) &&
1078 (hdr->cmd_status == MFI_STAT_OK) &&
1079 (cmd->scmd->cmnd[0] == INQUIRY)) {
1081 if (((*(u8 *) cmd->scmd->request_buffer) & 0x1F) ==
1083 cmd->scmd->result = DID_BAD_TARGET << 16;
1088 case MFI_CMD_LD_READ:
1089 case MFI_CMD_LD_WRITE:
1092 cmd->scmd->result = alt_status << 16;
1098 spin_lock_irqsave(&instance->instance_lock, flags);
1099 instance->fw_outstanding--;
1100 spin_unlock_irqrestore(&instance->instance_lock, flags);
1102 megasas_unmap_sgbuf(instance, cmd);
1103 cmd->scmd->scsi_done(cmd->scmd);
1104 megasas_return_cmd(instance, cmd);
1109 switch (hdr->cmd_status) {
1112 cmd->scmd->result = DID_OK << 16;
1115 case MFI_STAT_SCSI_IO_FAILED:
1116 case MFI_STAT_LD_INIT_IN_PROGRESS:
1118 (DID_ERROR << 16) | hdr->scsi_status;
1121 case MFI_STAT_SCSI_DONE_WITH_ERROR:
1123 cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
1125 if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
1126 memset(cmd->scmd->sense_buffer, 0,
1127 SCSI_SENSE_BUFFERSIZE);
1128 memcpy(cmd->scmd->sense_buffer, cmd->sense,
1131 cmd->scmd->result |= DRIVER_SENSE << 24;
1136 case MFI_STAT_LD_OFFLINE:
1137 case MFI_STAT_DEVICE_NOT_FOUND:
1138 cmd->scmd->result = DID_BAD_TARGET << 16;
1142 printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
1144 cmd->scmd->result = DID_ERROR << 16;
1148 spin_lock_irqsave(&instance->instance_lock, flags);
1149 instance->fw_outstanding--;
1150 spin_unlock_irqrestore(&instance->instance_lock, flags);
1152 megasas_unmap_sgbuf(instance, cmd);
1153 cmd->scmd->scsi_done(cmd->scmd);
1154 megasas_return_cmd(instance, cmd);
1163 * See if got an event notification
1165 if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
1166 megasas_service_aen(instance, cmd);
1168 megasas_complete_int_cmd(instance, cmd);
1174 * Cmd issued to abort another cmd returned
1176 megasas_complete_abort(instance, cmd);
1180 printk("megasas: Unknown command completed! [0x%X]\n",
1187 * megasas_deplete_reply_queue - Processes all completed commands
1188 * @instance: Adapter soft state
1189 * @alt_status: Alternate status to be returned to
1190 * SCSI mid-layer instead of the status
1191 * returned by the FW
1194 megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
1199 struct megasas_cmd *cmd;
1202 * Check if it is our interrupt
1203 * Clear the interrupt
1205 if(instance->instancet->clear_intr(instance->reg_set))
1208 producer = *instance->producer;
1209 consumer = *instance->consumer;
1211 while (consumer != producer) {
1212 context = instance->reply_queue[consumer];
1214 cmd = instance->cmd_list[context];
1216 megasas_complete_cmd(instance, cmd, alt_status);
1219 if (consumer == (instance->max_fw_cmds + 1)) {
1224 *instance->consumer = producer;
1230 * megasas_isr - isr entry point
1232 static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs)
1234 return megasas_deplete_reply_queue((struct megasas_instance *)devp,
1239 * megasas_transition_to_ready - Move the FW to READY state
1240 * @instance: Adapter soft state
1242 * During the initialization, FW passes can potentially be in any one of
1243 * several possible states. If the FW in operational, waiting-for-handshake
1244 * states, driver must take steps to bring it to ready state. Otherwise, it
1245 * has to wait for the ready state.
1248 megasas_transition_to_ready(struct megasas_instance* instance)
1255 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
1257 while (fw_state != MFI_STATE_READY) {
1259 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
1263 case MFI_STATE_FAULT:
1265 printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
1268 case MFI_STATE_WAIT_HANDSHAKE:
1270 * Set the CLR bit in inbound doorbell
1272 writel(MFI_INIT_CLEAR_HANDSHAKE,
1273 &instance->reg_set->inbound_doorbell);
1276 cur_state = MFI_STATE_WAIT_HANDSHAKE;
1279 case MFI_STATE_OPERATIONAL:
1281 * Bring it to READY state; assuming max wait 2 secs
1283 megasas_disable_intr(instance->reg_set);
1284 writel(MFI_INIT_READY, &instance->reg_set->inbound_doorbell);
1287 cur_state = MFI_STATE_OPERATIONAL;
1290 case MFI_STATE_UNDEFINED:
1292 * This state should not last for more than 2 seconds
1295 cur_state = MFI_STATE_UNDEFINED;
1298 case MFI_STATE_BB_INIT:
1300 cur_state = MFI_STATE_BB_INIT;
1303 case MFI_STATE_FW_INIT:
1305 cur_state = MFI_STATE_FW_INIT;
1308 case MFI_STATE_FW_INIT_2:
1310 cur_state = MFI_STATE_FW_INIT_2;
1313 case MFI_STATE_DEVICE_SCAN:
1315 cur_state = MFI_STATE_DEVICE_SCAN;
1318 case MFI_STATE_FLUSH_CACHE:
1320 cur_state = MFI_STATE_FLUSH_CACHE;
1324 printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
1330 * The cur_state should not last for more than max_wait secs
1332 for (i = 0; i < (max_wait * 1000); i++) {
1333 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
1336 if (fw_state == cur_state) {
1343 * Return error if fw_state hasn't changed after max_wait
1345 if (fw_state == cur_state) {
1346 printk(KERN_DEBUG "FW state [%d] hasn't changed "
1347 "in %d secs\n", fw_state, max_wait);
1356 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1357 * @instance: Adapter soft state
1359 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
1362 u32 max_cmd = instance->max_fw_cmds;
1363 struct megasas_cmd *cmd;
1365 if (!instance->frame_dma_pool)
1369 * Return all frames to pool
1371 for (i = 0; i < max_cmd; i++) {
1373 cmd = instance->cmd_list[i];
1376 pci_pool_free(instance->frame_dma_pool, cmd->frame,
1377 cmd->frame_phys_addr);
1380 pci_pool_free(instance->sense_dma_pool, cmd->frame,
1381 cmd->sense_phys_addr);
1385 * Now destroy the pool itself
1387 pci_pool_destroy(instance->frame_dma_pool);
1388 pci_pool_destroy(instance->sense_dma_pool);
1390 instance->frame_dma_pool = NULL;
1391 instance->sense_dma_pool = NULL;
1395 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1396 * @instance: Adapter soft state
1398 * Each command packet has an embedded DMA memory buffer that is used for
1399 * filling MFI frame and the SG list that immediately follows the frame. This
1400 * function creates those DMA memory buffers for each command packet by using
1401 * PCI pool facility.
1403 static int megasas_create_frame_pool(struct megasas_instance *instance)
1411 struct megasas_cmd *cmd;
1413 max_cmd = instance->max_fw_cmds;
1416 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1417 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1419 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1420 sizeof(struct megasas_sge32);
1423 * Calculated the number of 64byte frames required for SGL
1425 sgl_sz = sge_sz * instance->max_num_sge;
1426 frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
1429 * We need one extra frame for the MFI command
1433 total_sz = MEGAMFI_FRAME_SIZE * frame_count;
1435 * Use DMA pool facility provided by PCI layer
1437 instance->frame_dma_pool = pci_pool_create("megasas frame pool",
1438 instance->pdev, total_sz, 64,
1441 if (!instance->frame_dma_pool) {
1442 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
1446 instance->sense_dma_pool = pci_pool_create("megasas sense pool",
1447 instance->pdev, 128, 4, 0);
1449 if (!instance->sense_dma_pool) {
1450 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
1452 pci_pool_destroy(instance->frame_dma_pool);
1453 instance->frame_dma_pool = NULL;
1459 * Allocate and attach a frame to each of the commands in cmd_list.
1460 * By making cmd->index as the context instead of the &cmd, we can
1461 * always use 32bit context regardless of the architecture
1463 for (i = 0; i < max_cmd; i++) {
1465 cmd = instance->cmd_list[i];
1467 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
1468 GFP_KERNEL, &cmd->frame_phys_addr);
1470 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
1471 GFP_KERNEL, &cmd->sense_phys_addr);
1474 * megasas_teardown_frame_pool() takes care of freeing
1475 * whatever has been allocated
1477 if (!cmd->frame || !cmd->sense) {
1478 printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
1479 megasas_teardown_frame_pool(instance);
1483 cmd->frame->io.context = cmd->index;
1490 * megasas_free_cmds - Free all the cmds in the free cmd pool
1491 * @instance: Adapter soft state
1493 static void megasas_free_cmds(struct megasas_instance *instance)
1496 /* First free the MFI frame pool */
1497 megasas_teardown_frame_pool(instance);
1499 /* Free all the commands in the cmd_list */
1500 for (i = 0; i < instance->max_fw_cmds; i++)
1501 kfree(instance->cmd_list[i]);
1503 /* Free the cmd_list buffer itself */
1504 kfree(instance->cmd_list);
1505 instance->cmd_list = NULL;
1507 INIT_LIST_HEAD(&instance->cmd_pool);
1511 * megasas_alloc_cmds - Allocates the command packets
1512 * @instance: Adapter soft state
1514 * Each command that is issued to the FW, whether IO commands from the OS or
1515 * internal commands like IOCTLs, are wrapped in local data structure called
1516 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1519 * Each frame has a 32-bit field called context (tag). This context is used
1520 * to get back the megasas_cmd from the frame when a frame gets completed in
1521 * the ISR. Typically the address of the megasas_cmd itself would be used as
1522 * the context. But we wanted to keep the differences between 32 and 64 bit
1523 * systems to the mininum. We always use 32 bit integers for the context. In
1524 * this driver, the 32 bit values are the indices into an array cmd_list.
1525 * This array is used only to look up the megasas_cmd given the context. The
1526 * free commands themselves are maintained in a linked list called cmd_pool.
1528 static int megasas_alloc_cmds(struct megasas_instance *instance)
1533 struct megasas_cmd *cmd;
1535 max_cmd = instance->max_fw_cmds;
1538 * instance->cmd_list is an array of struct megasas_cmd pointers.
1539 * Allocate the dynamic array first and then allocate individual
1542 instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd,
1545 if (!instance->cmd_list) {
1546 printk(KERN_DEBUG "megasas: out of memory\n");
1550 memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd);
1552 for (i = 0; i < max_cmd; i++) {
1553 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
1556 if (!instance->cmd_list[i]) {
1558 for (j = 0; j < i; j++)
1559 kfree(instance->cmd_list[j]);
1561 kfree(instance->cmd_list);
1562 instance->cmd_list = NULL;
1569 * Add all the commands to command pool (instance->cmd_pool)
1571 for (i = 0; i < max_cmd; i++) {
1572 cmd = instance->cmd_list[i];
1573 memset(cmd, 0, sizeof(struct megasas_cmd));
1575 cmd->instance = instance;
1577 list_add_tail(&cmd->list, &instance->cmd_pool);
1581 * Create a frame pool and assign one frame to each cmd
1583 if (megasas_create_frame_pool(instance)) {
1584 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
1585 megasas_free_cmds(instance);
1592 * megasas_get_controller_info - Returns FW's controller structure
1593 * @instance: Adapter soft state
1594 * @ctrl_info: Controller information structure
1596 * Issues an internal command (DCMD) to get the FW's controller structure.
1597 * This information is mainly used to find out the maximum IO transfer per
1598 * command supported by the FW.
1601 megasas_get_ctrl_info(struct megasas_instance *instance,
1602 struct megasas_ctrl_info *ctrl_info)
1605 struct megasas_cmd *cmd;
1606 struct megasas_dcmd_frame *dcmd;
1607 struct megasas_ctrl_info *ci;
1608 dma_addr_t ci_h = 0;
1610 cmd = megasas_get_cmd(instance);
1613 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
1617 dcmd = &cmd->frame->dcmd;
1619 ci = pci_alloc_consistent(instance->pdev,
1620 sizeof(struct megasas_ctrl_info), &ci_h);
1623 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
1624 megasas_return_cmd(instance, cmd);
1628 memset(ci, 0, sizeof(*ci));
1629 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1631 dcmd->cmd = MFI_CMD_DCMD;
1632 dcmd->cmd_status = 0xFF;
1633 dcmd->sge_count = 1;
1634 dcmd->flags = MFI_FRAME_DIR_READ;
1636 dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
1637 dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
1638 dcmd->sgl.sge32[0].phys_addr = ci_h;
1639 dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
1641 if (!megasas_issue_polled(instance, cmd)) {
1643 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
1648 pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
1651 megasas_return_cmd(instance, cmd);
1656 * megasas_init_mfi - Initializes the FW
1657 * @instance: Adapter soft state
1659 * This is the main function for initializing MFI firmware.
1661 static int megasas_init_mfi(struct megasas_instance *instance)
1667 struct megasas_register_set __iomem *reg_set;
1669 struct megasas_cmd *cmd;
1670 struct megasas_ctrl_info *ctrl_info;
1672 struct megasas_init_frame *init_frame;
1673 struct megasas_init_queue_info *initq_info;
1674 dma_addr_t init_frame_h;
1675 dma_addr_t initq_info_h;
1678 * Map the message registers
1680 instance->base_addr = pci_resource_start(instance->pdev, 0);
1682 if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) {
1683 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
1687 instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
1689 if (!instance->reg_set) {
1690 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
1694 reg_set = instance->reg_set;
1696 switch(instance->pdev->device)
1698 case PCI_DEVICE_ID_LSI_SAS1078R:
1699 instance->instancet = &megasas_instance_template_ppc;
1701 case PCI_DEVICE_ID_LSI_SAS1064R:
1702 case PCI_DEVICE_ID_DELL_PERC5:
1704 instance->instancet = &megasas_instance_template_xscale;
1709 * We expect the FW state to be READY
1711 if (megasas_transition_to_ready(instance))
1712 goto fail_ready_state;
1715 * Get various operational parameters from status register
1717 instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
1718 instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
1721 * Create a pool of commands
1723 if (megasas_alloc_cmds(instance))
1724 goto fail_alloc_cmds;
1727 * Allocate memory for reply queue. Length of reply queue should
1728 * be _one_ more than the maximum commands handled by the firmware.
1730 * Note: When FW completes commands, it places corresponding contex
1731 * values in this circular reply queue. This circular queue is a fairly
1732 * typical producer-consumer queue. FW is the producer (of completed
1733 * commands) and the driver is the consumer.
1735 context_sz = sizeof(u32);
1736 reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
1738 instance->reply_queue = pci_alloc_consistent(instance->pdev,
1740 &instance->reply_queue_h);
1742 if (!instance->reply_queue) {
1743 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
1744 goto fail_reply_queue;
1748 * Prepare a init frame. Note the init frame points to queue info
1749 * structure. Each frame has SGL allocated after first 64 bytes. For
1750 * this frame - since we don't need any SGL - we use SGL's space as
1751 * queue info structure
1753 * We will not get a NULL command below. We just created the pool.
1755 cmd = megasas_get_cmd(instance);
1757 init_frame = (struct megasas_init_frame *)cmd->frame;
1758 initq_info = (struct megasas_init_queue_info *)
1759 ((unsigned long)init_frame + 64);
1761 init_frame_h = cmd->frame_phys_addr;
1762 initq_info_h = init_frame_h + 64;
1764 memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
1765 memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
1767 initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
1768 initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
1770 initq_info->producer_index_phys_addr_lo = instance->producer_h;
1771 initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
1773 init_frame->cmd = MFI_CMD_INIT;
1774 init_frame->cmd_status = 0xFF;
1775 init_frame->queue_info_new_phys_addr_lo = initq_info_h;
1777 init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
1780 * Issue the init frame in polled mode
1782 if (megasas_issue_polled(instance, cmd)) {
1783 printk(KERN_DEBUG "megasas: Failed to init firmware\n");
1787 megasas_return_cmd(instance, cmd);
1789 ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
1792 * Compute the max allowed sectors per IO: The controller info has two
1793 * limits on max sectors. Driver should use the minimum of these two.
1795 * 1 << stripe_sz_ops.min = max sectors per strip
1797 * Note that older firmwares ( < FW ver 30) didn't report information
1798 * to calculate max_sectors_1. So the number ended up as zero always.
1800 if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
1802 max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
1803 ctrl_info->max_strips_per_io;
1804 max_sectors_2 = ctrl_info->max_request_size;
1806 instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2)
1807 ? max_sectors_1 : max_sectors_2;
1809 instance->max_sectors_per_req = instance->max_num_sge *
1817 megasas_return_cmd(instance, cmd);
1819 pci_free_consistent(instance->pdev, reply_q_sz,
1820 instance->reply_queue, instance->reply_queue_h);
1822 megasas_free_cmds(instance);
1826 iounmap(instance->reg_set);
1829 pci_release_regions(instance->pdev);
1835 * megasas_release_mfi - Reverses the FW initialization
1836 * @intance: Adapter soft state
1838 static void megasas_release_mfi(struct megasas_instance *instance)
1840 u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1);
1842 pci_free_consistent(instance->pdev, reply_q_sz,
1843 instance->reply_queue, instance->reply_queue_h);
1845 megasas_free_cmds(instance);
1847 iounmap(instance->reg_set);
1849 pci_release_regions(instance->pdev);
1853 * megasas_get_seq_num - Gets latest event sequence numbers
1854 * @instance: Adapter soft state
1855 * @eli: FW event log sequence numbers information
1857 * FW maintains a log of all events in a non-volatile area. Upper layers would
1858 * usually find out the latest sequence number of the events, the seq number at
1859 * the boot etc. They would "read" all the events below the latest seq number
1860 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
1861 * number), they would subsribe to AEN (asynchronous event notification) and
1862 * wait for the events to happen.
1865 megasas_get_seq_num(struct megasas_instance *instance,
1866 struct megasas_evt_log_info *eli)
1868 struct megasas_cmd *cmd;
1869 struct megasas_dcmd_frame *dcmd;
1870 struct megasas_evt_log_info *el_info;
1871 dma_addr_t el_info_h = 0;
1873 cmd = megasas_get_cmd(instance);
1879 dcmd = &cmd->frame->dcmd;
1880 el_info = pci_alloc_consistent(instance->pdev,
1881 sizeof(struct megasas_evt_log_info),
1885 megasas_return_cmd(instance, cmd);
1889 memset(el_info, 0, sizeof(*el_info));
1890 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1892 dcmd->cmd = MFI_CMD_DCMD;
1893 dcmd->cmd_status = 0x0;
1894 dcmd->sge_count = 1;
1895 dcmd->flags = MFI_FRAME_DIR_READ;
1897 dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
1898 dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
1899 dcmd->sgl.sge32[0].phys_addr = el_info_h;
1900 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
1902 megasas_issue_blocked_cmd(instance, cmd);
1905 * Copy the data back into callers buffer
1907 memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
1909 pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
1910 el_info, el_info_h);
1912 megasas_return_cmd(instance, cmd);
1918 * megasas_register_aen - Registers for asynchronous event notification
1919 * @instance: Adapter soft state
1920 * @seq_num: The starting sequence number
1921 * @class_locale: Class of the event
1923 * This function subscribes for AEN for events beyond the @seq_num. It requests
1924 * to be notified if and only if the event is of type @class_locale
1927 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
1928 u32 class_locale_word)
1931 struct megasas_cmd *cmd;
1932 struct megasas_dcmd_frame *dcmd;
1933 union megasas_evt_class_locale curr_aen;
1934 union megasas_evt_class_locale prev_aen;
1937 * If there an AEN pending already (aen_cmd), check if the
1938 * class_locale of that pending AEN is inclusive of the new
1939 * AEN request we currently have. If it is, then we don't have
1940 * to do anything. In other words, whichever events the current
1941 * AEN request is subscribing to, have already been subscribed
1944 * If the old_cmd is _not_ inclusive, then we have to abort
1945 * that command, form a class_locale that is superset of both
1946 * old and current and re-issue to the FW
1949 curr_aen.word = class_locale_word;
1951 if (instance->aen_cmd) {
1953 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
1956 * A class whose enum value is smaller is inclusive of all
1957 * higher values. If a PROGRESS (= -1) was previously
1958 * registered, then a new registration requests for higher
1959 * classes need not be sent to FW. They are automatically
1962 * Locale numbers don't have such hierarchy. They are bitmap
1965 if ((prev_aen.members.class <= curr_aen.members.class) &&
1966 !((prev_aen.members.locale & curr_aen.members.locale) ^
1967 curr_aen.members.locale)) {
1969 * Previously issued event registration includes
1970 * current request. Nothing to do.
1974 curr_aen.members.locale |= prev_aen.members.locale;
1976 if (prev_aen.members.class < curr_aen.members.class)
1977 curr_aen.members.class = prev_aen.members.class;
1979 instance->aen_cmd->abort_aen = 1;
1980 ret_val = megasas_issue_blocked_abort_cmd(instance,
1985 printk(KERN_DEBUG "megasas: Failed to abort "
1986 "previous AEN command\n");
1992 cmd = megasas_get_cmd(instance);
1997 dcmd = &cmd->frame->dcmd;
1999 memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
2002 * Prepare DCMD for aen registration
2004 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2006 dcmd->cmd = MFI_CMD_DCMD;
2007 dcmd->cmd_status = 0x0;
2008 dcmd->sge_count = 1;
2009 dcmd->flags = MFI_FRAME_DIR_READ;
2011 dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
2012 dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
2013 dcmd->mbox.w[0] = seq_num;
2014 dcmd->mbox.w[1] = curr_aen.word;
2015 dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
2016 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
2019 * Store reference to the cmd used to register for AEN. When an
2020 * application wants us to register for AEN, we have to abort this
2021 * cmd and re-register with a new EVENT LOCALE supplied by that app
2023 instance->aen_cmd = cmd;
2026 * Issue the aen registration frame
2028 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
2034 * megasas_start_aen - Subscribes to AEN during driver load time
2035 * @instance: Adapter soft state
2037 static int megasas_start_aen(struct megasas_instance *instance)
2039 struct megasas_evt_log_info eli;
2040 union megasas_evt_class_locale class_locale;
2043 * Get the latest sequence number from FW
2045 memset(&eli, 0, sizeof(eli));
2047 if (megasas_get_seq_num(instance, &eli))
2051 * Register AEN with FW for latest sequence number plus 1
2053 class_locale.members.reserved = 0;
2054 class_locale.members.locale = MR_EVT_LOCALE_ALL;
2055 class_locale.members.class = MR_EVT_CLASS_DEBUG;
2057 return megasas_register_aen(instance, eli.newest_seq_num + 1,
2062 * megasas_io_attach - Attaches this driver to SCSI mid-layer
2063 * @instance: Adapter soft state
2065 static int megasas_io_attach(struct megasas_instance *instance)
2067 struct Scsi_Host *host = instance->host;
2070 * Export parameters required by SCSI mid-layer
2072 host->irq = instance->pdev->irq;
2073 host->unique_id = instance->unique_id;
2074 host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS;
2075 host->this_id = instance->init_id;
2076 host->sg_tablesize = instance->max_num_sge;
2077 host->max_sectors = instance->max_sectors_per_req;
2078 host->cmd_per_lun = 128;
2079 host->max_channel = MEGASAS_MAX_CHANNELS - 1;
2080 host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
2081 host->max_lun = MEGASAS_MAX_LUN;
2082 host->max_cmd_len = 16;
2085 * Notify the mid-layer about the new controller
2087 if (scsi_add_host(host, &instance->pdev->dev)) {
2088 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
2093 * Trigger SCSI to scan our drives
2095 scsi_scan_host(host);
2100 * megasas_probe_one - PCI hotplug entry point
2101 * @pdev: PCI device structure
2102 * @id: PCI ids of supported hotplugged adapter
2104 static int __devinit
2105 megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
2108 struct Scsi_Host *host;
2109 struct megasas_instance *instance;
2112 * Announce PCI information
2114 printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2115 pdev->vendor, pdev->device, pdev->subsystem_vendor,
2116 pdev->subsystem_device);
2118 printk("bus %d:slot %d:func %d\n",
2119 pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
2122 * PCI prepping: enable device set bus mastering and dma mask
2124 rval = pci_enable_device(pdev);
2130 pci_set_master(pdev);
2133 * All our contollers are capable of performing 64-bit DMA
2136 if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
2138 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2139 goto fail_set_dma_mask;
2142 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2143 goto fail_set_dma_mask;
2146 host = scsi_host_alloc(&megasas_template,
2147 sizeof(struct megasas_instance));
2150 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
2151 goto fail_alloc_instance;
2154 instance = (struct megasas_instance *)host->hostdata;
2155 memset(instance, 0, sizeof(*instance));
2157 instance->producer = pci_alloc_consistent(pdev, sizeof(u32),
2158 &instance->producer_h);
2159 instance->consumer = pci_alloc_consistent(pdev, sizeof(u32),
2160 &instance->consumer_h);
2162 if (!instance->producer || !instance->consumer) {
2163 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2164 "producer, consumer\n");
2165 goto fail_alloc_dma_buf;
2168 *instance->producer = 0;
2169 *instance->consumer = 0;
2171 instance->evt_detail = pci_alloc_consistent(pdev,
2173 megasas_evt_detail),
2174 &instance->evt_detail_h);
2176 if (!instance->evt_detail) {
2177 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2178 "event detail structure\n");
2179 goto fail_alloc_dma_buf;
2183 * Initialize locks and queues
2185 INIT_LIST_HEAD(&instance->cmd_pool);
2187 init_waitqueue_head(&instance->int_cmd_wait_q);
2188 init_waitqueue_head(&instance->abort_cmd_wait_q);
2190 spin_lock_init(&instance->cmd_pool_lock);
2191 spin_lock_init(&instance->instance_lock);
2193 sema_init(&instance->aen_mutex, 1);
2194 sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
2197 * Initialize PCI related and misc parameters
2199 instance->pdev = pdev;
2200 instance->host = host;
2201 instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
2202 instance->init_id = MEGASAS_DEFAULT_INIT_ID;
2205 * Initialize MFI Firmware
2207 if (megasas_init_mfi(instance))
2213 if (request_irq(pdev->irq, megasas_isr, SA_SHIRQ, "megasas", instance)) {
2214 printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
2218 instance->instancet->enable_intr(instance->reg_set);
2221 * Store instance in PCI softstate
2223 pci_set_drvdata(pdev, instance);
2226 * Add this controller to megasas_mgmt_info structure so that it
2227 * can be exported to management applications
2229 megasas_mgmt_info.count++;
2230 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
2231 megasas_mgmt_info.max_index++;
2234 * Initiate AEN (Asynchronous Event Notification)
2236 if (megasas_start_aen(instance)) {
2237 printk(KERN_DEBUG "megasas: start aen failed\n");
2238 goto fail_start_aen;
2242 * Register with SCSI mid-layer
2244 if (megasas_io_attach(instance))
2245 goto fail_io_attach;
2251 megasas_mgmt_info.count--;
2252 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
2253 megasas_mgmt_info.max_index--;
2255 pci_set_drvdata(pdev, NULL);
2256 megasas_disable_intr(instance->reg_set);
2257 free_irq(instance->pdev->irq, instance);
2259 megasas_release_mfi(instance);
2264 if (instance->evt_detail)
2265 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2266 instance->evt_detail,
2267 instance->evt_detail_h);
2269 if (instance->producer)
2270 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2271 instance->producer_h);
2272 if (instance->consumer)
2273 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2274 instance->consumer_h);
2275 scsi_host_put(host);
2277 fail_alloc_instance:
2279 pci_disable_device(pdev);
2285 * megasas_flush_cache - Requests FW to flush all its caches
2286 * @instance: Adapter soft state
2288 static void megasas_flush_cache(struct megasas_instance *instance)
2290 struct megasas_cmd *cmd;
2291 struct megasas_dcmd_frame *dcmd;
2293 cmd = megasas_get_cmd(instance);
2298 dcmd = &cmd->frame->dcmd;
2300 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2302 dcmd->cmd = MFI_CMD_DCMD;
2303 dcmd->cmd_status = 0x0;
2304 dcmd->sge_count = 0;
2305 dcmd->flags = MFI_FRAME_DIR_NONE;
2307 dcmd->data_xfer_len = 0;
2308 dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
2309 dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
2311 megasas_issue_blocked_cmd(instance, cmd);
2313 megasas_return_cmd(instance, cmd);
2319 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2320 * @instance: Adapter soft state
2322 static void megasas_shutdown_controller(struct megasas_instance *instance)
2324 struct megasas_cmd *cmd;
2325 struct megasas_dcmd_frame *dcmd;
2327 cmd = megasas_get_cmd(instance);
2332 if (instance->aen_cmd)
2333 megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
2335 dcmd = &cmd->frame->dcmd;
2337 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2339 dcmd->cmd = MFI_CMD_DCMD;
2340 dcmd->cmd_status = 0x0;
2341 dcmd->sge_count = 0;
2342 dcmd->flags = MFI_FRAME_DIR_NONE;
2344 dcmd->data_xfer_len = 0;
2345 dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN;
2347 megasas_issue_blocked_cmd(instance, cmd);
2349 megasas_return_cmd(instance, cmd);
2355 * megasas_detach_one - PCI hot"un"plug entry point
2356 * @pdev: PCI device structure
2358 static void megasas_detach_one(struct pci_dev *pdev)
2361 struct Scsi_Host *host;
2362 struct megasas_instance *instance;
2364 instance = pci_get_drvdata(pdev);
2365 host = instance->host;
2367 scsi_remove_host(instance->host);
2368 megasas_flush_cache(instance);
2369 megasas_shutdown_controller(instance);
2372 * Take the instance off the instance array. Note that we will not
2373 * decrement the max_index. We let this array be sparse array
2375 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2376 if (megasas_mgmt_info.instance[i] == instance) {
2377 megasas_mgmt_info.count--;
2378 megasas_mgmt_info.instance[i] = NULL;
2384 pci_set_drvdata(instance->pdev, NULL);
2386 megasas_disable_intr(instance->reg_set);
2388 free_irq(instance->pdev->irq, instance);
2390 megasas_release_mfi(instance);
2392 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2393 instance->evt_detail, instance->evt_detail_h);
2395 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2396 instance->producer_h);
2398 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2399 instance->consumer_h);
2401 scsi_host_put(host);
2403 pci_set_drvdata(pdev, NULL);
2405 pci_disable_device(pdev);
2411 * megasas_shutdown - Shutdown entry point
2412 * @device: Generic device structure
2414 static void megasas_shutdown(struct pci_dev *pdev)
2416 struct megasas_instance *instance = pci_get_drvdata(pdev);
2417 megasas_flush_cache(instance);
2421 * megasas_mgmt_open - char node "open" entry point
2423 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
2426 * Allow only those users with admin rights
2428 if (!capable(CAP_SYS_ADMIN))
2435 * megasas_mgmt_release - char node "release" entry point
2437 static int megasas_mgmt_release(struct inode *inode, struct file *filep)
2439 filep->private_data = NULL;
2440 fasync_helper(-1, filep, 0, &megasas_async_queue);
2446 * megasas_mgmt_fasync - Async notifier registration from applications
2448 * This function adds the calling process to a driver global queue. When an
2449 * event occurs, SIGIO will be sent to all processes in this queue.
2451 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
2455 mutex_lock(&megasas_async_queue_mutex);
2457 rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
2459 mutex_unlock(&megasas_async_queue_mutex);
2462 /* For sanity check when we get ioctl */
2463 filep->private_data = filep;
2467 printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
2473 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2474 * @instance: Adapter soft state
2475 * @argp: User's ioctl packet
2478 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
2479 struct megasas_iocpacket __user * user_ioc,
2480 struct megasas_iocpacket *ioc)
2482 struct megasas_sge32 *kern_sge32;
2483 struct megasas_cmd *cmd;
2484 void *kbuff_arr[MAX_IOCTL_SGE];
2485 dma_addr_t buf_handle = 0;
2488 dma_addr_t sense_handle;
2491 memset(kbuff_arr, 0, sizeof(kbuff_arr));
2493 if (ioc->sge_count > MAX_IOCTL_SGE) {
2494 printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n",
2495 ioc->sge_count, MAX_IOCTL_SGE);
2499 cmd = megasas_get_cmd(instance);
2501 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
2506 * User's IOCTL packet has 2 frames (maximum). Copy those two
2507 * frames into our cmd's frames. cmd->frame's context will get
2508 * overwritten when we copy from user's frames. So set that value
2511 memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
2512 cmd->frame->hdr.context = cmd->index;
2515 * The management interface between applications and the fw uses
2516 * MFI frames. E.g, RAID configuration changes, LD property changes
2517 * etc are accomplishes through different kinds of MFI frames. The
2518 * driver needs to care only about substituting user buffers with
2519 * kernel buffers in SGLs. The location of SGL is embedded in the
2520 * struct iocpacket itself.
2522 kern_sge32 = (struct megasas_sge32 *)
2523 ((unsigned long)cmd->frame + ioc->sgl_off);
2526 * For each user buffer, create a mirror buffer and copy in
2528 for (i = 0; i < ioc->sge_count; i++) {
2529 kbuff_arr[i] = pci_alloc_consistent(instance->pdev,
2530 ioc->sgl[i].iov_len,
2532 if (!kbuff_arr[i]) {
2533 printk(KERN_DEBUG "megasas: Failed to alloc "
2534 "kernel SGL buffer for IOCTL \n");
2540 * We don't change the dma_coherent_mask, so
2541 * pci_alloc_consistent only returns 32bit addresses
2543 kern_sge32[i].phys_addr = (u32) buf_handle;
2544 kern_sge32[i].length = ioc->sgl[i].iov_len;
2547 * We created a kernel buffer corresponding to the
2548 * user buffer. Now copy in from the user buffer
2550 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
2551 (u32) (ioc->sgl[i].iov_len))) {
2557 if (ioc->sense_len) {
2558 sense = pci_alloc_consistent(instance->pdev, ioc->sense_len,
2566 (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
2567 *sense_ptr = sense_handle;
2571 * Set the sync_cmd flag so that the ISR knows not to complete this
2572 * cmd to the SCSI mid-layer
2575 megasas_issue_blocked_cmd(instance, cmd);
2579 * copy out the kernel buffers to user buffers
2581 for (i = 0; i < ioc->sge_count; i++) {
2582 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
2583 ioc->sgl[i].iov_len)) {
2590 * copy out the sense
2592 if (ioc->sense_len) {
2594 * sense_ptr points to the location that has the user
2595 * sense buffer address
2597 sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
2600 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
2601 sense, ioc->sense_len)) {
2608 * copy the status codes returned by the fw
2610 if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
2611 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
2612 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
2618 pci_free_consistent(instance->pdev, ioc->sense_len,
2619 sense, sense_handle);
2622 for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
2623 pci_free_consistent(instance->pdev,
2624 kern_sge32[i].length,
2625 kbuff_arr[i], kern_sge32[i].phys_addr);
2628 megasas_return_cmd(instance, cmd);
2632 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
2636 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2638 if ((megasas_mgmt_info.instance[i]) &&
2639 (megasas_mgmt_info.instance[i]->host->host_no == host_no))
2640 return megasas_mgmt_info.instance[i];
2646 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
2648 struct megasas_iocpacket __user *user_ioc =
2649 (struct megasas_iocpacket __user *)arg;
2650 struct megasas_iocpacket *ioc;
2651 struct megasas_instance *instance;
2654 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
2658 if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
2663 instance = megasas_lookup_instance(ioc->host_no);
2670 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
2672 if (down_interruptible(&instance->ioctl_sem)) {
2673 error = -ERESTARTSYS;
2676 error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
2677 up(&instance->ioctl_sem);
2684 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
2686 struct megasas_instance *instance;
2687 struct megasas_aen aen;
2690 if (file->private_data != file) {
2691 printk(KERN_DEBUG "megasas: fasync_helper was not "
2696 if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
2699 instance = megasas_lookup_instance(aen.host_no);
2704 down(&instance->aen_mutex);
2705 error = megasas_register_aen(instance, aen.seq_num,
2706 aen.class_locale_word);
2707 up(&instance->aen_mutex);
2712 * megasas_mgmt_ioctl - char node ioctl entry point
2715 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2718 case MEGASAS_IOC_FIRMWARE:
2719 return megasas_mgmt_ioctl_fw(file, arg);
2721 case MEGASAS_IOC_GET_AEN:
2722 return megasas_mgmt_ioctl_aen(file, arg);
2728 #ifdef CONFIG_COMPAT
2729 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
2731 struct compat_megasas_iocpacket __user *cioc =
2732 (struct compat_megasas_iocpacket __user *)arg;
2733 struct megasas_iocpacket __user *ioc =
2734 compat_alloc_user_space(sizeof(struct megasas_iocpacket));
2738 clear_user(ioc, sizeof(*ioc));
2740 if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
2741 copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
2742 copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
2743 copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
2744 copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
2745 copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
2748 for (i = 0; i < MAX_IOCTL_SGE; i++) {
2751 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
2752 put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
2753 copy_in_user(&ioc->sgl[i].iov_len,
2754 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
2758 error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
2760 if (copy_in_user(&cioc->frame.hdr.cmd_status,
2761 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
2762 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
2769 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
2773 case MEGASAS_IOC_FIRMWARE32:
2774 return megasas_mgmt_compat_ioctl_fw(file, arg);
2775 case MEGASAS_IOC_GET_AEN:
2776 return megasas_mgmt_ioctl_aen(file, arg);
2784 * File operations structure for management interface
2786 static struct file_operations megasas_mgmt_fops = {
2787 .owner = THIS_MODULE,
2788 .open = megasas_mgmt_open,
2789 .release = megasas_mgmt_release,
2790 .fasync = megasas_mgmt_fasync,
2791 .unlocked_ioctl = megasas_mgmt_ioctl,
2792 #ifdef CONFIG_COMPAT
2793 .compat_ioctl = megasas_mgmt_compat_ioctl,
2798 * PCI hotplug support registration structure
2800 static struct pci_driver megasas_pci_driver = {
2802 .name = "megaraid_sas",
2803 .id_table = megasas_pci_table,
2804 .probe = megasas_probe_one,
2805 .remove = __devexit_p(megasas_detach_one),
2806 .shutdown = megasas_shutdown,
2810 * Sysfs driver attributes
2812 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
2814 return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
2818 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
2821 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
2823 return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
2827 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
2831 * megasas_init - Driver load entry point
2833 static int __init megasas_init(void)
2838 * Announce driver version and other information
2840 printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
2841 MEGASAS_EXT_VERSION);
2843 memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
2846 * Register character device node
2848 rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
2851 printk(KERN_DEBUG "megasas: failed to open device node\n");
2855 megasas_mgmt_majorno = rval;
2858 * Register ourselves as PCI hotplug module
2860 rval = pci_module_init(&megasas_pci_driver);
2863 printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
2864 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
2867 driver_create_file(&megasas_pci_driver.driver, &driver_attr_version);
2868 driver_create_file(&megasas_pci_driver.driver,
2869 &driver_attr_release_date);
2875 * megasas_exit - Driver unload entry point
2877 static void __exit megasas_exit(void)
2879 driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
2880 driver_remove_file(&megasas_pci_driver.driver,
2881 &driver_attr_release_date);
2883 pci_unregister_driver(&megasas_pci_driver);
2884 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
2887 module_init(megasas_init);
2888 module_exit(megasas_exit);