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 : v00.00.03.01
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 */
69 PCI_VENDOR_ID_LSI_LOGIC,
70 PCI_DEVICE_ID_LSI_VERDE_ZCR, /* xscale IOP, vega */
76 PCI_DEVICE_ID_DELL_PERC5, /* xscale IOP */
80 {0} /* Terminating entry */
83 MODULE_DEVICE_TABLE(pci, megasas_pci_table);
85 static int megasas_mgmt_majorno;
86 static struct megasas_mgmt_info megasas_mgmt_info;
87 static struct fasync_struct *megasas_async_queue;
88 static DEFINE_MUTEX(megasas_async_queue_mutex);
91 * megasas_get_cmd - Get a command from the free pool
92 * @instance: Adapter soft state
94 * Returns a free command from the pool
96 static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
100 struct megasas_cmd *cmd = NULL;
102 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
104 if (!list_empty(&instance->cmd_pool)) {
105 cmd = list_entry((&instance->cmd_pool)->next,
106 struct megasas_cmd, list);
107 list_del_init(&cmd->list);
109 printk(KERN_ERR "megasas: Command pool empty!\n");
112 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
117 * megasas_return_cmd - Return a cmd to free command pool
118 * @instance: Adapter soft state
119 * @cmd: Command packet to be returned to free command pool
122 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
126 spin_lock_irqsave(&instance->cmd_pool_lock, flags);
129 list_add_tail(&cmd->list, &instance->cmd_pool);
131 spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
136 * The following functions are defined for xscale
137 * (deviceid : 1064R, PERC5) controllers
141 * megasas_enable_intr_xscale - Enables interrupts
142 * @regs: MFI register set
145 megasas_enable_intr_xscale(struct megasas_register_set __iomem * regs)
147 writel(1, &(regs)->outbound_intr_mask);
149 /* Dummy readl to force pci flush */
150 readl(®s->outbound_intr_mask);
154 * megasas_read_fw_status_reg_xscale - returns the current FW status value
155 * @regs: MFI register set
158 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem * regs)
160 return readl(&(regs)->outbound_msg_0);
163 * megasas_clear_interrupt_xscale - Check & clear interrupt
164 * @regs: MFI register set
167 megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs)
171 * Check if it is our interrupt
173 status = readl(®s->outbound_intr_status);
175 if (!(status & MFI_OB_INTR_STATUS_MASK)) {
180 * Clear the interrupt by writing back the same value
182 writel(status, ®s->outbound_intr_status);
188 * megasas_fire_cmd_xscale - Sends command to the FW
189 * @frame_phys_addr : Physical address of cmd
190 * @frame_count : Number of frames for the command
191 * @regs : MFI register set
194 megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr,u32 frame_count, struct megasas_register_set __iomem *regs)
196 writel((frame_phys_addr >> 3)|(frame_count),
197 &(regs)->inbound_queue_port);
200 static struct megasas_instance_template megasas_instance_template_xscale = {
202 .fire_cmd = megasas_fire_cmd_xscale,
203 .enable_intr = megasas_enable_intr_xscale,
204 .clear_intr = megasas_clear_intr_xscale,
205 .read_fw_status_reg = megasas_read_fw_status_reg_xscale,
209 * This is the end of set of functions & definitions specific
210 * to xscale (deviceid : 1064R, PERC5) controllers
214 * The following functions are defined for ppc (deviceid : 0x60)
219 * megasas_enable_intr_ppc - Enables interrupts
220 * @regs: MFI register set
223 megasas_enable_intr_ppc(struct megasas_register_set __iomem * regs)
225 writel(0xFFFFFFFF, &(regs)->outbound_doorbell_clear);
227 writel(~0x80000004, &(regs)->outbound_intr_mask);
229 /* Dummy readl to force pci flush */
230 readl(®s->outbound_intr_mask);
234 * megasas_read_fw_status_reg_ppc - returns the current FW status value
235 * @regs: MFI register set
238 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem * regs)
240 return readl(&(regs)->outbound_scratch_pad);
244 * megasas_clear_interrupt_ppc - Check & clear interrupt
245 * @regs: MFI register set
248 megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs)
252 * Check if it is our interrupt
254 status = readl(®s->outbound_intr_status);
256 if (!(status & MFI_REPLY_1078_MESSAGE_INTERRUPT)) {
261 * Clear the interrupt by writing back the same value
263 writel(status, ®s->outbound_doorbell_clear);
268 * megasas_fire_cmd_ppc - Sends command to the FW
269 * @frame_phys_addr : Physical address of cmd
270 * @frame_count : Number of frames for the command
271 * @regs : MFI register set
274 megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr, u32 frame_count, struct megasas_register_set __iomem *regs)
276 writel((frame_phys_addr | (frame_count<<1))|1,
277 &(regs)->inbound_queue_port);
280 static struct megasas_instance_template megasas_instance_template_ppc = {
282 .fire_cmd = megasas_fire_cmd_ppc,
283 .enable_intr = megasas_enable_intr_ppc,
284 .clear_intr = megasas_clear_intr_ppc,
285 .read_fw_status_reg = megasas_read_fw_status_reg_ppc,
289 * This is the end of set of functions & definitions
290 * specific to ppc (deviceid : 0x60) controllers
294 * megasas_disable_intr - Disables interrupts
295 * @regs: MFI register set
298 megasas_disable_intr(struct megasas_instance *instance)
301 struct megasas_register_set __iomem *regs = instance->reg_set;
303 if(instance->pdev->device == PCI_DEVICE_ID_LSI_SAS1078R)
306 writel(mask, ®s->outbound_intr_mask);
308 /* Dummy readl to force pci flush */
309 readl(®s->outbound_intr_mask);
313 * megasas_issue_polled - Issues a polling command
314 * @instance: Adapter soft state
315 * @cmd: Command packet to be issued
317 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
320 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
323 u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
325 struct megasas_header *frame_hdr = &cmd->frame->hdr;
327 frame_hdr->cmd_status = 0xFF;
328 frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
331 * Issue the frame using inbound queue port
333 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
336 * Wait for cmd_status to change
338 for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
343 if (frame_hdr->cmd_status == 0xff)
350 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
351 * @instance: Adapter soft state
352 * @cmd: Command to be issued
354 * This function waits on an event for the command to be returned from ISR.
355 * Used to issue ioctl commands.
358 megasas_issue_blocked_cmd(struct megasas_instance *instance,
359 struct megasas_cmd *cmd)
361 cmd->cmd_status = ENODATA;
363 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
365 wait_event(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA));
371 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
372 * @instance: Adapter soft state
373 * @cmd_to_abort: Previously issued cmd to be aborted
375 * MFI firmware can abort previously issued AEN comamnd (automatic event
376 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
377 * cmd and blocks till it is completed.
380 megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
381 struct megasas_cmd *cmd_to_abort)
383 struct megasas_cmd *cmd;
384 struct megasas_abort_frame *abort_fr;
386 cmd = megasas_get_cmd(instance);
391 abort_fr = &cmd->frame->abort;
394 * Prepare and issue the abort frame
396 abort_fr->cmd = MFI_CMD_ABORT;
397 abort_fr->cmd_status = 0xFF;
399 abort_fr->abort_context = cmd_to_abort->index;
400 abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
401 abort_fr->abort_mfi_phys_addr_hi = 0;
404 cmd->cmd_status = 0xFF;
406 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
409 * Wait for this cmd to complete
411 wait_event(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF));
413 megasas_return_cmd(instance, cmd);
418 * megasas_make_sgl32 - Prepares 32-bit SGL
419 * @instance: Adapter soft state
420 * @scp: SCSI command from the mid-layer
421 * @mfi_sgl: SGL to be filled in
423 * If successful, this function returns the number of SG elements. Otherwise,
427 megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
428 union megasas_sgl *mfi_sgl)
432 struct scatterlist *os_sgl;
435 * Return 0 if there is no data transfer
437 if (!scp->request_buffer || !scp->request_bufflen)
441 mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev,
448 mfi_sgl->sge32[0].length = scp->request_bufflen;
453 os_sgl = (struct scatterlist *)scp->request_buffer;
454 sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
455 scp->sc_data_direction);
457 for (i = 0; i < sge_count; i++, os_sgl++) {
458 mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
459 mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
466 * megasas_make_sgl64 - Prepares 64-bit SGL
467 * @instance: Adapter soft state
468 * @scp: SCSI command from the mid-layer
469 * @mfi_sgl: SGL to be filled in
471 * If successful, this function returns the number of SG elements. Otherwise,
475 megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
476 union megasas_sgl *mfi_sgl)
480 struct scatterlist *os_sgl;
483 * Return 0 if there is no data transfer
485 if (!scp->request_buffer || !scp->request_bufflen)
489 mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev,
497 mfi_sgl->sge64[0].length = scp->request_bufflen;
502 os_sgl = (struct scatterlist *)scp->request_buffer;
503 sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
504 scp->sc_data_direction);
506 for (i = 0; i < sge_count; i++, os_sgl++) {
507 mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
508 mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
515 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
516 * @instance: Adapter soft state
518 * @cmd: Command to be prepared in
520 * This function prepares CDB commands. These are typcially pass-through
521 * commands to the devices.
524 megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
525 struct megasas_cmd *cmd)
532 struct megasas_pthru_frame *pthru;
534 is_logical = MEGASAS_IS_LOGICAL(scp);
535 device_id = MEGASAS_DEV_INDEX(instance, scp);
536 pthru = (struct megasas_pthru_frame *)cmd->frame;
538 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
539 flags = MFI_FRAME_DIR_WRITE;
540 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
541 flags = MFI_FRAME_DIR_READ;
542 else if (scp->sc_data_direction == PCI_DMA_NONE)
543 flags = MFI_FRAME_DIR_NONE;
546 * Prepare the DCDB frame
548 pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
549 pthru->cmd_status = 0x0;
550 pthru->scsi_status = 0x0;
551 pthru->target_id = device_id;
552 pthru->lun = scp->device->lun;
553 pthru->cdb_len = scp->cmd_len;
555 pthru->flags = flags;
556 pthru->data_xfer_len = scp->request_bufflen;
558 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
563 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
564 sizeof(struct megasas_sge32);
567 pthru->flags |= MFI_FRAME_SGL64;
568 pthru->sge_count = megasas_make_sgl64(instance, scp,
571 pthru->sge_count = megasas_make_sgl32(instance, scp,
575 * Sense info specific
577 pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
578 pthru->sense_buf_phys_addr_hi = 0;
579 pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
581 sge_bytes = sge_sz * pthru->sge_count;
584 * Compute the total number of frames this command consumes. FW uses
585 * this number to pull sufficient number of frames from host memory.
587 cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
588 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
590 if (cmd->frame_count > 7)
591 cmd->frame_count = 8;
593 return cmd->frame_count;
597 * megasas_build_ldio - Prepares IOs to logical devices
598 * @instance: Adapter soft state
600 * @cmd: Command to to be prepared
602 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
605 megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
606 struct megasas_cmd *cmd)
611 u8 sc = scp->cmnd[0];
613 struct megasas_io_frame *ldio;
615 device_id = MEGASAS_DEV_INDEX(instance, scp);
616 ldio = (struct megasas_io_frame *)cmd->frame;
618 if (scp->sc_data_direction == PCI_DMA_TODEVICE)
619 flags = MFI_FRAME_DIR_WRITE;
620 else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
621 flags = MFI_FRAME_DIR_READ;
624 * Preare the Logical IO frame: 2nd bit is zero for all read cmds
626 ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
627 ldio->cmd_status = 0x0;
628 ldio->scsi_status = 0x0;
629 ldio->target_id = device_id;
631 ldio->reserved_0 = 0;
634 ldio->start_lba_hi = 0;
635 ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
638 * 6-byte READ(0x08) or WRITE(0x0A) cdb
640 if (scp->cmd_len == 6) {
641 ldio->lba_count = (u32) scp->cmnd[4];
642 ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
643 ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
645 ldio->start_lba_lo &= 0x1FFFFF;
649 * 10-byte READ(0x28) or WRITE(0x2A) cdb
651 else if (scp->cmd_len == 10) {
652 ldio->lba_count = (u32) scp->cmnd[8] |
653 ((u32) scp->cmnd[7] << 8);
654 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
655 ((u32) scp->cmnd[3] << 16) |
656 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
660 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
662 else if (scp->cmd_len == 12) {
663 ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
664 ((u32) scp->cmnd[7] << 16) |
665 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
667 ldio->start_lba_lo = ((u32) scp->cmnd[2] << 24) |
668 ((u32) scp->cmnd[3] << 16) |
669 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
673 * 16-byte READ(0x88) or WRITE(0x8A) cdb
675 else if (scp->cmd_len == 16) {
676 ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
677 ((u32) scp->cmnd[11] << 16) |
678 ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
680 ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
681 ((u32) scp->cmnd[7] << 16) |
682 ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
684 ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
685 ((u32) scp->cmnd[3] << 16) |
686 ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
693 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
694 sizeof(struct megasas_sge32);
697 ldio->flags |= MFI_FRAME_SGL64;
698 ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
700 ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
703 * Sense info specific
705 ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
706 ldio->sense_buf_phys_addr_hi = 0;
707 ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
709 sge_bytes = sge_sz * ldio->sge_count;
711 cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
712 ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
714 if (cmd->frame_count > 7)
715 cmd->frame_count = 8;
717 return cmd->frame_count;
721 * megasas_is_ldio - Checks if the cmd is for logical drive
722 * @scmd: SCSI command
724 * Called by megasas_queue_command to find out if the command to be queued
725 * is a logical drive command
727 static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
729 if (!MEGASAS_IS_LOGICAL(cmd))
731 switch (cmd->cmnd[0]) {
747 * megasas_queue_command - Queue entry point
748 * @scmd: SCSI command to be queued
749 * @done: Callback entry point
752 megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
755 struct megasas_cmd *cmd;
756 struct megasas_instance *instance;
758 instance = (struct megasas_instance *)
759 scmd->device->host->hostdata;
760 scmd->scsi_done = done;
763 if (MEGASAS_IS_LOGICAL(scmd) &&
764 (scmd->device->id >= MEGASAS_MAX_LD || scmd->device->lun)) {
765 scmd->result = DID_BAD_TARGET << 16;
769 cmd = megasas_get_cmd(instance);
771 return SCSI_MLQUEUE_HOST_BUSY;
774 * Logical drive command
776 if (megasas_is_ldio(scmd))
777 frame_count = megasas_build_ldio(instance, scmd, cmd);
779 frame_count = megasas_build_dcdb(instance, scmd, cmd);
787 * Issue the command to the FW
789 atomic_inc(&instance->fw_outstanding);
791 instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set);
796 megasas_return_cmd(instance, cmd);
802 static int megasas_slave_configure(struct scsi_device *sdev)
805 * Don't export physical disk devices to the disk driver.
807 * FIXME: Currently we don't export them to the midlayer at all.
808 * That will be fixed once LSI engineers have audited the
809 * firmware for possible issues.
811 if (sdev->channel < MEGASAS_MAX_PD_CHANNELS && sdev->type == TYPE_DISK)
815 * The RAID firmware may require extended timeouts.
817 if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS)
818 sdev->timeout = 90 * HZ;
823 * megasas_wait_for_outstanding - Wait for all outstanding cmds
824 * @instance: Adapter soft state
826 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
827 * complete all its outstanding commands. Returns error if one or more IOs
828 * are pending after this time period. It also marks the controller dead.
830 static int megasas_wait_for_outstanding(struct megasas_instance *instance)
833 u32 wait_time = MEGASAS_RESET_WAIT_TIME;
835 for (i = 0; i < wait_time; i++) {
837 int outstanding = atomic_read(&instance->fw_outstanding);
842 if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
843 printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
844 "commands to complete\n",i,outstanding);
850 if (atomic_read(&instance->fw_outstanding)) {
851 instance->hw_crit_error = 1;
859 * megasas_generic_reset - Generic reset routine
860 * @scmd: Mid-layer SCSI command
862 * This routine implements a generic reset handler for device, bus and host
863 * reset requests. Device, bus and host specific reset handlers can use this
864 * function after they do their specific tasks.
866 static int megasas_generic_reset(struct scsi_cmnd *scmd)
869 struct megasas_instance *instance;
871 instance = (struct megasas_instance *)scmd->device->host->hostdata;
873 scmd_printk(KERN_NOTICE, scmd, "megasas: RESET -%ld cmd=%x\n",
874 scmd->serial_number, scmd->cmnd[0]);
876 if (instance->hw_crit_error) {
877 printk(KERN_ERR "megasas: cannot recover from previous reset "
882 ret_val = megasas_wait_for_outstanding(instance);
883 if (ret_val == SUCCESS)
884 printk(KERN_NOTICE "megasas: reset successful \n");
886 printk(KERN_ERR "megasas: failed to do reset\n");
892 * megasas_reset_device - Device reset handler entry point
894 static int megasas_reset_device(struct scsi_cmnd *scmd)
899 * First wait for all commands to complete
901 ret = megasas_generic_reset(scmd);
907 * megasas_reset_bus_host - Bus & host reset handler entry point
909 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
914 * First wait for all commands to complete
916 ret = megasas_generic_reset(scmd);
922 * megasas_service_aen - Processes an event notification
923 * @instance: Adapter soft state
924 * @cmd: AEN command completed by the ISR
926 * For AEN, driver sends a command down to FW that is held by the FW till an
927 * event occurs. When an event of interest occurs, FW completes the command
928 * that it was previously holding.
930 * This routines sends SIGIO signal to processes that have registered with the
934 megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
937 * Don't signal app if it is just an aborted previously registered aen
940 kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
944 instance->aen_cmd = NULL;
945 megasas_return_cmd(instance, cmd);
949 * Scsi host template for megaraid_sas driver
951 static struct scsi_host_template megasas_template = {
953 .module = THIS_MODULE,
954 .name = "LSI Logic SAS based MegaRAID driver",
955 .proc_name = "megaraid_sas",
956 .slave_configure = megasas_slave_configure,
957 .queuecommand = megasas_queue_command,
958 .eh_device_reset_handler = megasas_reset_device,
959 .eh_bus_reset_handler = megasas_reset_bus_host,
960 .eh_host_reset_handler = megasas_reset_bus_host,
961 .use_clustering = ENABLE_CLUSTERING,
965 * megasas_complete_int_cmd - Completes an internal command
966 * @instance: Adapter soft state
967 * @cmd: Command to be completed
969 * The megasas_issue_blocked_cmd() function waits for a command to complete
970 * after it issues a command. This function wakes up that waiting routine by
971 * calling wake_up() on the wait queue.
974 megasas_complete_int_cmd(struct megasas_instance *instance,
975 struct megasas_cmd *cmd)
977 cmd->cmd_status = cmd->frame->io.cmd_status;
979 if (cmd->cmd_status == ENODATA) {
982 wake_up(&instance->int_cmd_wait_q);
986 * megasas_complete_abort - Completes aborting a command
987 * @instance: Adapter soft state
988 * @cmd: Cmd that was issued to abort another cmd
990 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
991 * after it issues an abort on a previously issued command. This function
992 * wakes up all functions waiting on the same wait queue.
995 megasas_complete_abort(struct megasas_instance *instance,
996 struct megasas_cmd *cmd)
1000 cmd->cmd_status = 0;
1001 wake_up(&instance->abort_cmd_wait_q);
1008 * megasas_unmap_sgbuf - Unmap SG buffers
1009 * @instance: Adapter soft state
1010 * @cmd: Completed command
1013 megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd)
1018 if (cmd->scmd->use_sg) {
1019 pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer,
1020 cmd->scmd->use_sg, cmd->scmd->sc_data_direction);
1024 if (!cmd->scmd->request_bufflen)
1027 opcode = cmd->frame->hdr.cmd;
1029 if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) {
1031 buf_h = cmd->frame->io.sgl.sge64[0].phys_addr;
1033 buf_h = cmd->frame->io.sgl.sge32[0].phys_addr;
1036 buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr;
1038 buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr;
1041 pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen,
1042 cmd->scmd->sc_data_direction);
1047 * megasas_complete_cmd - Completes a command
1048 * @instance: Adapter soft state
1049 * @cmd: Command to be completed
1050 * @alt_status: If non-zero, use this value as status to
1051 * SCSI mid-layer instead of the value returned
1052 * by the FW. This should be used if caller wants
1053 * an alternate status (as in the case of aborted
1057 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
1061 struct megasas_header *hdr = &cmd->frame->hdr;
1064 cmd->scmd->SCp.ptr = (char *)0;
1069 case MFI_CMD_PD_SCSI_IO:
1070 case MFI_CMD_LD_SCSI_IO:
1073 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
1074 * issued either through an IO path or an IOCTL path. If it
1075 * was via IOCTL, we will send it to internal completion.
1077 if (cmd->sync_cmd) {
1079 megasas_complete_int_cmd(instance, cmd);
1083 case MFI_CMD_LD_READ:
1084 case MFI_CMD_LD_WRITE:
1087 cmd->scmd->result = alt_status << 16;
1093 atomic_dec(&instance->fw_outstanding);
1095 megasas_unmap_sgbuf(instance, cmd);
1096 cmd->scmd->scsi_done(cmd->scmd);
1097 megasas_return_cmd(instance, cmd);
1102 switch (hdr->cmd_status) {
1105 cmd->scmd->result = DID_OK << 16;
1108 case MFI_STAT_SCSI_IO_FAILED:
1109 case MFI_STAT_LD_INIT_IN_PROGRESS:
1111 (DID_ERROR << 16) | hdr->scsi_status;
1114 case MFI_STAT_SCSI_DONE_WITH_ERROR:
1116 cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
1118 if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
1119 memset(cmd->scmd->sense_buffer, 0,
1120 SCSI_SENSE_BUFFERSIZE);
1121 memcpy(cmd->scmd->sense_buffer, cmd->sense,
1124 cmd->scmd->result |= DRIVER_SENSE << 24;
1129 case MFI_STAT_LD_OFFLINE:
1130 case MFI_STAT_DEVICE_NOT_FOUND:
1131 cmd->scmd->result = DID_BAD_TARGET << 16;
1135 printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
1137 cmd->scmd->result = DID_ERROR << 16;
1141 atomic_dec(&instance->fw_outstanding);
1143 megasas_unmap_sgbuf(instance, cmd);
1144 cmd->scmd->scsi_done(cmd->scmd);
1145 megasas_return_cmd(instance, cmd);
1154 * See if got an event notification
1156 if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
1157 megasas_service_aen(instance, cmd);
1159 megasas_complete_int_cmd(instance, cmd);
1165 * Cmd issued to abort another cmd returned
1167 megasas_complete_abort(instance, cmd);
1171 printk("megasas: Unknown command completed! [0x%X]\n",
1178 * megasas_deplete_reply_queue - Processes all completed commands
1179 * @instance: Adapter soft state
1180 * @alt_status: Alternate status to be returned to
1181 * SCSI mid-layer instead of the status
1182 * returned by the FW
1185 megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
1190 struct megasas_cmd *cmd;
1193 * Check if it is our interrupt
1194 * Clear the interrupt
1196 if(instance->instancet->clear_intr(instance->reg_set))
1199 producer = *instance->producer;
1200 consumer = *instance->consumer;
1202 while (consumer != producer) {
1203 context = instance->reply_queue[consumer];
1205 cmd = instance->cmd_list[context];
1207 megasas_complete_cmd(instance, cmd, alt_status);
1210 if (consumer == (instance->max_fw_cmds + 1)) {
1215 *instance->consumer = producer;
1221 * megasas_isr - isr entry point
1223 static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs)
1225 return megasas_deplete_reply_queue((struct megasas_instance *)devp,
1230 * megasas_transition_to_ready - Move the FW to READY state
1231 * @instance: Adapter soft state
1233 * During the initialization, FW passes can potentially be in any one of
1234 * several possible states. If the FW in operational, waiting-for-handshake
1235 * states, driver must take steps to bring it to ready state. Otherwise, it
1236 * has to wait for the ready state.
1239 megasas_transition_to_ready(struct megasas_instance* instance)
1246 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
1248 while (fw_state != MFI_STATE_READY) {
1250 printk(KERN_INFO "megasas: Waiting for FW to come to ready"
1254 case MFI_STATE_FAULT:
1256 printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
1259 case MFI_STATE_WAIT_HANDSHAKE:
1261 * Set the CLR bit in inbound doorbell
1263 writel(MFI_INIT_CLEAR_HANDSHAKE,
1264 &instance->reg_set->inbound_doorbell);
1267 cur_state = MFI_STATE_WAIT_HANDSHAKE;
1270 case MFI_STATE_OPERATIONAL:
1272 * Bring it to READY state; assuming max wait 2 secs
1274 megasas_disable_intr(instance);
1275 writel(MFI_INIT_READY, &instance->reg_set->inbound_doorbell);
1278 cur_state = MFI_STATE_OPERATIONAL;
1281 case MFI_STATE_UNDEFINED:
1283 * This state should not last for more than 2 seconds
1286 cur_state = MFI_STATE_UNDEFINED;
1289 case MFI_STATE_BB_INIT:
1291 cur_state = MFI_STATE_BB_INIT;
1294 case MFI_STATE_FW_INIT:
1296 cur_state = MFI_STATE_FW_INIT;
1299 case MFI_STATE_FW_INIT_2:
1301 cur_state = MFI_STATE_FW_INIT_2;
1304 case MFI_STATE_DEVICE_SCAN:
1306 cur_state = MFI_STATE_DEVICE_SCAN;
1309 case MFI_STATE_FLUSH_CACHE:
1311 cur_state = MFI_STATE_FLUSH_CACHE;
1315 printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
1321 * The cur_state should not last for more than max_wait secs
1323 for (i = 0; i < (max_wait * 1000); i++) {
1324 fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) &
1327 if (fw_state == cur_state) {
1334 * Return error if fw_state hasn't changed after max_wait
1336 if (fw_state == cur_state) {
1337 printk(KERN_DEBUG "FW state [%d] hasn't changed "
1338 "in %d secs\n", fw_state, max_wait);
1347 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1348 * @instance: Adapter soft state
1350 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
1353 u32 max_cmd = instance->max_fw_cmds;
1354 struct megasas_cmd *cmd;
1356 if (!instance->frame_dma_pool)
1360 * Return all frames to pool
1362 for (i = 0; i < max_cmd; i++) {
1364 cmd = instance->cmd_list[i];
1367 pci_pool_free(instance->frame_dma_pool, cmd->frame,
1368 cmd->frame_phys_addr);
1371 pci_pool_free(instance->sense_dma_pool, cmd->frame,
1372 cmd->sense_phys_addr);
1376 * Now destroy the pool itself
1378 pci_pool_destroy(instance->frame_dma_pool);
1379 pci_pool_destroy(instance->sense_dma_pool);
1381 instance->frame_dma_pool = NULL;
1382 instance->sense_dma_pool = NULL;
1386 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1387 * @instance: Adapter soft state
1389 * Each command packet has an embedded DMA memory buffer that is used for
1390 * filling MFI frame and the SG list that immediately follows the frame. This
1391 * function creates those DMA memory buffers for each command packet by using
1392 * PCI pool facility.
1394 static int megasas_create_frame_pool(struct megasas_instance *instance)
1402 struct megasas_cmd *cmd;
1404 max_cmd = instance->max_fw_cmds;
1407 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1408 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1410 sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
1411 sizeof(struct megasas_sge32);
1414 * Calculated the number of 64byte frames required for SGL
1416 sgl_sz = sge_sz * instance->max_num_sge;
1417 frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
1420 * We need one extra frame for the MFI command
1424 total_sz = MEGAMFI_FRAME_SIZE * frame_count;
1426 * Use DMA pool facility provided by PCI layer
1428 instance->frame_dma_pool = pci_pool_create("megasas frame pool",
1429 instance->pdev, total_sz, 64,
1432 if (!instance->frame_dma_pool) {
1433 printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
1437 instance->sense_dma_pool = pci_pool_create("megasas sense pool",
1438 instance->pdev, 128, 4, 0);
1440 if (!instance->sense_dma_pool) {
1441 printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
1443 pci_pool_destroy(instance->frame_dma_pool);
1444 instance->frame_dma_pool = NULL;
1450 * Allocate and attach a frame to each of the commands in cmd_list.
1451 * By making cmd->index as the context instead of the &cmd, we can
1452 * always use 32bit context regardless of the architecture
1454 for (i = 0; i < max_cmd; i++) {
1456 cmd = instance->cmd_list[i];
1458 cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
1459 GFP_KERNEL, &cmd->frame_phys_addr);
1461 cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
1462 GFP_KERNEL, &cmd->sense_phys_addr);
1465 * megasas_teardown_frame_pool() takes care of freeing
1466 * whatever has been allocated
1468 if (!cmd->frame || !cmd->sense) {
1469 printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
1470 megasas_teardown_frame_pool(instance);
1474 cmd->frame->io.context = cmd->index;
1481 * megasas_free_cmds - Free all the cmds in the free cmd pool
1482 * @instance: Adapter soft state
1484 static void megasas_free_cmds(struct megasas_instance *instance)
1487 /* First free the MFI frame pool */
1488 megasas_teardown_frame_pool(instance);
1490 /* Free all the commands in the cmd_list */
1491 for (i = 0; i < instance->max_fw_cmds; i++)
1492 kfree(instance->cmd_list[i]);
1494 /* Free the cmd_list buffer itself */
1495 kfree(instance->cmd_list);
1496 instance->cmd_list = NULL;
1498 INIT_LIST_HEAD(&instance->cmd_pool);
1502 * megasas_alloc_cmds - Allocates the command packets
1503 * @instance: Adapter soft state
1505 * Each command that is issued to the FW, whether IO commands from the OS or
1506 * internal commands like IOCTLs, are wrapped in local data structure called
1507 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1510 * Each frame has a 32-bit field called context (tag). This context is used
1511 * to get back the megasas_cmd from the frame when a frame gets completed in
1512 * the ISR. Typically the address of the megasas_cmd itself would be used as
1513 * the context. But we wanted to keep the differences between 32 and 64 bit
1514 * systems to the mininum. We always use 32 bit integers for the context. In
1515 * this driver, the 32 bit values are the indices into an array cmd_list.
1516 * This array is used only to look up the megasas_cmd given the context. The
1517 * free commands themselves are maintained in a linked list called cmd_pool.
1519 static int megasas_alloc_cmds(struct megasas_instance *instance)
1524 struct megasas_cmd *cmd;
1526 max_cmd = instance->max_fw_cmds;
1529 * instance->cmd_list is an array of struct megasas_cmd pointers.
1530 * Allocate the dynamic array first and then allocate individual
1533 instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd,
1536 if (!instance->cmd_list) {
1537 printk(KERN_DEBUG "megasas: out of memory\n");
1541 memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd);
1543 for (i = 0; i < max_cmd; i++) {
1544 instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
1547 if (!instance->cmd_list[i]) {
1549 for (j = 0; j < i; j++)
1550 kfree(instance->cmd_list[j]);
1552 kfree(instance->cmd_list);
1553 instance->cmd_list = NULL;
1560 * Add all the commands to command pool (instance->cmd_pool)
1562 for (i = 0; i < max_cmd; i++) {
1563 cmd = instance->cmd_list[i];
1564 memset(cmd, 0, sizeof(struct megasas_cmd));
1566 cmd->instance = instance;
1568 list_add_tail(&cmd->list, &instance->cmd_pool);
1572 * Create a frame pool and assign one frame to each cmd
1574 if (megasas_create_frame_pool(instance)) {
1575 printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
1576 megasas_free_cmds(instance);
1583 * megasas_get_controller_info - Returns FW's controller structure
1584 * @instance: Adapter soft state
1585 * @ctrl_info: Controller information structure
1587 * Issues an internal command (DCMD) to get the FW's controller structure.
1588 * This information is mainly used to find out the maximum IO transfer per
1589 * command supported by the FW.
1592 megasas_get_ctrl_info(struct megasas_instance *instance,
1593 struct megasas_ctrl_info *ctrl_info)
1596 struct megasas_cmd *cmd;
1597 struct megasas_dcmd_frame *dcmd;
1598 struct megasas_ctrl_info *ci;
1599 dma_addr_t ci_h = 0;
1601 cmd = megasas_get_cmd(instance);
1604 printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
1608 dcmd = &cmd->frame->dcmd;
1610 ci = pci_alloc_consistent(instance->pdev,
1611 sizeof(struct megasas_ctrl_info), &ci_h);
1614 printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
1615 megasas_return_cmd(instance, cmd);
1619 memset(ci, 0, sizeof(*ci));
1620 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1622 dcmd->cmd = MFI_CMD_DCMD;
1623 dcmd->cmd_status = 0xFF;
1624 dcmd->sge_count = 1;
1625 dcmd->flags = MFI_FRAME_DIR_READ;
1627 dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
1628 dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
1629 dcmd->sgl.sge32[0].phys_addr = ci_h;
1630 dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
1632 if (!megasas_issue_polled(instance, cmd)) {
1634 memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
1639 pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
1642 megasas_return_cmd(instance, cmd);
1647 * megasas_init_mfi - Initializes the FW
1648 * @instance: Adapter soft state
1650 * This is the main function for initializing MFI firmware.
1652 static int megasas_init_mfi(struct megasas_instance *instance)
1658 struct megasas_register_set __iomem *reg_set;
1660 struct megasas_cmd *cmd;
1661 struct megasas_ctrl_info *ctrl_info;
1663 struct megasas_init_frame *init_frame;
1664 struct megasas_init_queue_info *initq_info;
1665 dma_addr_t init_frame_h;
1666 dma_addr_t initq_info_h;
1669 * Map the message registers
1671 instance->base_addr = pci_resource_start(instance->pdev, 0);
1673 if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) {
1674 printk(KERN_DEBUG "megasas: IO memory region busy!\n");
1678 instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
1680 if (!instance->reg_set) {
1681 printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
1685 reg_set = instance->reg_set;
1687 switch(instance->pdev->device)
1689 case PCI_DEVICE_ID_LSI_SAS1078R:
1690 instance->instancet = &megasas_instance_template_ppc;
1692 case PCI_DEVICE_ID_LSI_SAS1064R:
1693 case PCI_DEVICE_ID_DELL_PERC5:
1695 instance->instancet = &megasas_instance_template_xscale;
1700 * We expect the FW state to be READY
1702 if (megasas_transition_to_ready(instance))
1703 goto fail_ready_state;
1706 * Get various operational parameters from status register
1708 instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
1709 instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
1712 * Create a pool of commands
1714 if (megasas_alloc_cmds(instance))
1715 goto fail_alloc_cmds;
1718 * Allocate memory for reply queue. Length of reply queue should
1719 * be _one_ more than the maximum commands handled by the firmware.
1721 * Note: When FW completes commands, it places corresponding contex
1722 * values in this circular reply queue. This circular queue is a fairly
1723 * typical producer-consumer queue. FW is the producer (of completed
1724 * commands) and the driver is the consumer.
1726 context_sz = sizeof(u32);
1727 reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
1729 instance->reply_queue = pci_alloc_consistent(instance->pdev,
1731 &instance->reply_queue_h);
1733 if (!instance->reply_queue) {
1734 printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
1735 goto fail_reply_queue;
1739 * Prepare a init frame. Note the init frame points to queue info
1740 * structure. Each frame has SGL allocated after first 64 bytes. For
1741 * this frame - since we don't need any SGL - we use SGL's space as
1742 * queue info structure
1744 * We will not get a NULL command below. We just created the pool.
1746 cmd = megasas_get_cmd(instance);
1748 init_frame = (struct megasas_init_frame *)cmd->frame;
1749 initq_info = (struct megasas_init_queue_info *)
1750 ((unsigned long)init_frame + 64);
1752 init_frame_h = cmd->frame_phys_addr;
1753 initq_info_h = init_frame_h + 64;
1755 memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
1756 memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
1758 initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
1759 initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
1761 initq_info->producer_index_phys_addr_lo = instance->producer_h;
1762 initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
1764 init_frame->cmd = MFI_CMD_INIT;
1765 init_frame->cmd_status = 0xFF;
1766 init_frame->queue_info_new_phys_addr_lo = initq_info_h;
1768 init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
1771 * disable the intr before firing the init frame to FW
1773 megasas_disable_intr(instance);
1776 * Issue the init frame in polled mode
1778 if (megasas_issue_polled(instance, cmd)) {
1779 printk(KERN_DEBUG "megasas: Failed to init firmware\n");
1783 megasas_return_cmd(instance, cmd);
1785 ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
1788 * Compute the max allowed sectors per IO: The controller info has two
1789 * limits on max sectors. Driver should use the minimum of these two.
1791 * 1 << stripe_sz_ops.min = max sectors per strip
1793 * Note that older firmwares ( < FW ver 30) didn't report information
1794 * to calculate max_sectors_1. So the number ended up as zero always.
1796 if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
1798 max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
1799 ctrl_info->max_strips_per_io;
1800 max_sectors_2 = ctrl_info->max_request_size;
1802 instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2)
1803 ? max_sectors_1 : max_sectors_2;
1805 instance->max_sectors_per_req = instance->max_num_sge *
1813 megasas_return_cmd(instance, cmd);
1815 pci_free_consistent(instance->pdev, reply_q_sz,
1816 instance->reply_queue, instance->reply_queue_h);
1818 megasas_free_cmds(instance);
1822 iounmap(instance->reg_set);
1825 pci_release_regions(instance->pdev);
1831 * megasas_release_mfi - Reverses the FW initialization
1832 * @intance: Adapter soft state
1834 static void megasas_release_mfi(struct megasas_instance *instance)
1836 u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1);
1838 pci_free_consistent(instance->pdev, reply_q_sz,
1839 instance->reply_queue, instance->reply_queue_h);
1841 megasas_free_cmds(instance);
1843 iounmap(instance->reg_set);
1845 pci_release_regions(instance->pdev);
1849 * megasas_get_seq_num - Gets latest event sequence numbers
1850 * @instance: Adapter soft state
1851 * @eli: FW event log sequence numbers information
1853 * FW maintains a log of all events in a non-volatile area. Upper layers would
1854 * usually find out the latest sequence number of the events, the seq number at
1855 * the boot etc. They would "read" all the events below the latest seq number
1856 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
1857 * number), they would subsribe to AEN (asynchronous event notification) and
1858 * wait for the events to happen.
1861 megasas_get_seq_num(struct megasas_instance *instance,
1862 struct megasas_evt_log_info *eli)
1864 struct megasas_cmd *cmd;
1865 struct megasas_dcmd_frame *dcmd;
1866 struct megasas_evt_log_info *el_info;
1867 dma_addr_t el_info_h = 0;
1869 cmd = megasas_get_cmd(instance);
1875 dcmd = &cmd->frame->dcmd;
1876 el_info = pci_alloc_consistent(instance->pdev,
1877 sizeof(struct megasas_evt_log_info),
1881 megasas_return_cmd(instance, cmd);
1885 memset(el_info, 0, sizeof(*el_info));
1886 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
1888 dcmd->cmd = MFI_CMD_DCMD;
1889 dcmd->cmd_status = 0x0;
1890 dcmd->sge_count = 1;
1891 dcmd->flags = MFI_FRAME_DIR_READ;
1893 dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
1894 dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
1895 dcmd->sgl.sge32[0].phys_addr = el_info_h;
1896 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
1898 megasas_issue_blocked_cmd(instance, cmd);
1901 * Copy the data back into callers buffer
1903 memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
1905 pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
1906 el_info, el_info_h);
1908 megasas_return_cmd(instance, cmd);
1914 * megasas_register_aen - Registers for asynchronous event notification
1915 * @instance: Adapter soft state
1916 * @seq_num: The starting sequence number
1917 * @class_locale: Class of the event
1919 * This function subscribes for AEN for events beyond the @seq_num. It requests
1920 * to be notified if and only if the event is of type @class_locale
1923 megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
1924 u32 class_locale_word)
1927 struct megasas_cmd *cmd;
1928 struct megasas_dcmd_frame *dcmd;
1929 union megasas_evt_class_locale curr_aen;
1930 union megasas_evt_class_locale prev_aen;
1933 * If there an AEN pending already (aen_cmd), check if the
1934 * class_locale of that pending AEN is inclusive of the new
1935 * AEN request we currently have. If it is, then we don't have
1936 * to do anything. In other words, whichever events the current
1937 * AEN request is subscribing to, have already been subscribed
1940 * If the old_cmd is _not_ inclusive, then we have to abort
1941 * that command, form a class_locale that is superset of both
1942 * old and current and re-issue to the FW
1945 curr_aen.word = class_locale_word;
1947 if (instance->aen_cmd) {
1949 prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
1952 * A class whose enum value is smaller is inclusive of all
1953 * higher values. If a PROGRESS (= -1) was previously
1954 * registered, then a new registration requests for higher
1955 * classes need not be sent to FW. They are automatically
1958 * Locale numbers don't have such hierarchy. They are bitmap
1961 if ((prev_aen.members.class <= curr_aen.members.class) &&
1962 !((prev_aen.members.locale & curr_aen.members.locale) ^
1963 curr_aen.members.locale)) {
1965 * Previously issued event registration includes
1966 * current request. Nothing to do.
1970 curr_aen.members.locale |= prev_aen.members.locale;
1972 if (prev_aen.members.class < curr_aen.members.class)
1973 curr_aen.members.class = prev_aen.members.class;
1975 instance->aen_cmd->abort_aen = 1;
1976 ret_val = megasas_issue_blocked_abort_cmd(instance,
1981 printk(KERN_DEBUG "megasas: Failed to abort "
1982 "previous AEN command\n");
1988 cmd = megasas_get_cmd(instance);
1993 dcmd = &cmd->frame->dcmd;
1995 memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
1998 * Prepare DCMD for aen registration
2000 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2002 dcmd->cmd = MFI_CMD_DCMD;
2003 dcmd->cmd_status = 0x0;
2004 dcmd->sge_count = 1;
2005 dcmd->flags = MFI_FRAME_DIR_READ;
2007 dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
2008 dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
2009 dcmd->mbox.w[0] = seq_num;
2010 dcmd->mbox.w[1] = curr_aen.word;
2011 dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
2012 dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
2015 * Store reference to the cmd used to register for AEN. When an
2016 * application wants us to register for AEN, we have to abort this
2017 * cmd and re-register with a new EVENT LOCALE supplied by that app
2019 instance->aen_cmd = cmd;
2022 * Issue the aen registration frame
2024 instance->instancet->fire_cmd(cmd->frame_phys_addr ,0,instance->reg_set);
2030 * megasas_start_aen - Subscribes to AEN during driver load time
2031 * @instance: Adapter soft state
2033 static int megasas_start_aen(struct megasas_instance *instance)
2035 struct megasas_evt_log_info eli;
2036 union megasas_evt_class_locale class_locale;
2039 * Get the latest sequence number from FW
2041 memset(&eli, 0, sizeof(eli));
2043 if (megasas_get_seq_num(instance, &eli))
2047 * Register AEN with FW for latest sequence number plus 1
2049 class_locale.members.reserved = 0;
2050 class_locale.members.locale = MR_EVT_LOCALE_ALL;
2051 class_locale.members.class = MR_EVT_CLASS_DEBUG;
2053 return megasas_register_aen(instance, eli.newest_seq_num + 1,
2058 * megasas_io_attach - Attaches this driver to SCSI mid-layer
2059 * @instance: Adapter soft state
2061 static int megasas_io_attach(struct megasas_instance *instance)
2063 struct Scsi_Host *host = instance->host;
2066 * Export parameters required by SCSI mid-layer
2068 host->irq = instance->pdev->irq;
2069 host->unique_id = instance->unique_id;
2070 host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS;
2071 host->this_id = instance->init_id;
2072 host->sg_tablesize = instance->max_num_sge;
2073 host->max_sectors = instance->max_sectors_per_req;
2074 host->cmd_per_lun = 128;
2075 host->max_channel = MEGASAS_MAX_CHANNELS - 1;
2076 host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
2077 host->max_lun = MEGASAS_MAX_LUN;
2078 host->max_cmd_len = 16;
2081 * Notify the mid-layer about the new controller
2083 if (scsi_add_host(host, &instance->pdev->dev)) {
2084 printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
2089 * Trigger SCSI to scan our drives
2091 scsi_scan_host(host);
2096 * megasas_probe_one - PCI hotplug entry point
2097 * @pdev: PCI device structure
2098 * @id: PCI ids of supported hotplugged adapter
2100 static int __devinit
2101 megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
2104 struct Scsi_Host *host;
2105 struct megasas_instance *instance;
2108 * Announce PCI information
2110 printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2111 pdev->vendor, pdev->device, pdev->subsystem_vendor,
2112 pdev->subsystem_device);
2114 printk("bus %d:slot %d:func %d\n",
2115 pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
2118 * PCI prepping: enable device set bus mastering and dma mask
2120 rval = pci_enable_device(pdev);
2126 pci_set_master(pdev);
2129 * All our contollers are capable of performing 64-bit DMA
2132 if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
2134 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2135 goto fail_set_dma_mask;
2138 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
2139 goto fail_set_dma_mask;
2142 host = scsi_host_alloc(&megasas_template,
2143 sizeof(struct megasas_instance));
2146 printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
2147 goto fail_alloc_instance;
2150 instance = (struct megasas_instance *)host->hostdata;
2151 memset(instance, 0, sizeof(*instance));
2153 instance->producer = pci_alloc_consistent(pdev, sizeof(u32),
2154 &instance->producer_h);
2155 instance->consumer = pci_alloc_consistent(pdev, sizeof(u32),
2156 &instance->consumer_h);
2158 if (!instance->producer || !instance->consumer) {
2159 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2160 "producer, consumer\n");
2161 goto fail_alloc_dma_buf;
2164 *instance->producer = 0;
2165 *instance->consumer = 0;
2167 instance->evt_detail = pci_alloc_consistent(pdev,
2169 megasas_evt_detail),
2170 &instance->evt_detail_h);
2172 if (!instance->evt_detail) {
2173 printk(KERN_DEBUG "megasas: Failed to allocate memory for "
2174 "event detail structure\n");
2175 goto fail_alloc_dma_buf;
2179 * Initialize locks and queues
2181 INIT_LIST_HEAD(&instance->cmd_pool);
2183 atomic_set(&instance->fw_outstanding,0);
2185 init_waitqueue_head(&instance->int_cmd_wait_q);
2186 init_waitqueue_head(&instance->abort_cmd_wait_q);
2188 spin_lock_init(&instance->cmd_pool_lock);
2190 sema_init(&instance->aen_mutex, 1);
2191 sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
2194 * Initialize PCI related and misc parameters
2196 instance->pdev = pdev;
2197 instance->host = host;
2198 instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
2199 instance->init_id = MEGASAS_DEFAULT_INIT_ID;
2202 * Initialize MFI Firmware
2204 if (megasas_init_mfi(instance))
2210 if (request_irq(pdev->irq, megasas_isr, SA_SHIRQ, "megasas", instance)) {
2211 printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
2215 instance->instancet->enable_intr(instance->reg_set);
2218 * Store instance in PCI softstate
2220 pci_set_drvdata(pdev, instance);
2223 * Add this controller to megasas_mgmt_info structure so that it
2224 * can be exported to management applications
2226 megasas_mgmt_info.count++;
2227 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
2228 megasas_mgmt_info.max_index++;
2231 * Initiate AEN (Asynchronous Event Notification)
2233 if (megasas_start_aen(instance)) {
2234 printk(KERN_DEBUG "megasas: start aen failed\n");
2235 goto fail_start_aen;
2239 * Register with SCSI mid-layer
2241 if (megasas_io_attach(instance))
2242 goto fail_io_attach;
2248 megasas_mgmt_info.count--;
2249 megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
2250 megasas_mgmt_info.max_index--;
2252 pci_set_drvdata(pdev, NULL);
2253 megasas_disable_intr(instance);
2254 free_irq(instance->pdev->irq, instance);
2256 megasas_release_mfi(instance);
2261 if (instance->evt_detail)
2262 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2263 instance->evt_detail,
2264 instance->evt_detail_h);
2266 if (instance->producer)
2267 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2268 instance->producer_h);
2269 if (instance->consumer)
2270 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2271 instance->consumer_h);
2272 scsi_host_put(host);
2274 fail_alloc_instance:
2276 pci_disable_device(pdev);
2282 * megasas_flush_cache - Requests FW to flush all its caches
2283 * @instance: Adapter soft state
2285 static void megasas_flush_cache(struct megasas_instance *instance)
2287 struct megasas_cmd *cmd;
2288 struct megasas_dcmd_frame *dcmd;
2290 cmd = megasas_get_cmd(instance);
2295 dcmd = &cmd->frame->dcmd;
2297 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2299 dcmd->cmd = MFI_CMD_DCMD;
2300 dcmd->cmd_status = 0x0;
2301 dcmd->sge_count = 0;
2302 dcmd->flags = MFI_FRAME_DIR_NONE;
2304 dcmd->data_xfer_len = 0;
2305 dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
2306 dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
2308 megasas_issue_blocked_cmd(instance, cmd);
2310 megasas_return_cmd(instance, cmd);
2316 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2317 * @instance: Adapter soft state
2319 static void megasas_shutdown_controller(struct megasas_instance *instance)
2321 struct megasas_cmd *cmd;
2322 struct megasas_dcmd_frame *dcmd;
2324 cmd = megasas_get_cmd(instance);
2329 if (instance->aen_cmd)
2330 megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
2332 dcmd = &cmd->frame->dcmd;
2334 memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
2336 dcmd->cmd = MFI_CMD_DCMD;
2337 dcmd->cmd_status = 0x0;
2338 dcmd->sge_count = 0;
2339 dcmd->flags = MFI_FRAME_DIR_NONE;
2341 dcmd->data_xfer_len = 0;
2342 dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN;
2344 megasas_issue_blocked_cmd(instance, cmd);
2346 megasas_return_cmd(instance, cmd);
2352 * megasas_detach_one - PCI hot"un"plug entry point
2353 * @pdev: PCI device structure
2355 static void megasas_detach_one(struct pci_dev *pdev)
2358 struct Scsi_Host *host;
2359 struct megasas_instance *instance;
2361 instance = pci_get_drvdata(pdev);
2362 host = instance->host;
2364 scsi_remove_host(instance->host);
2365 megasas_flush_cache(instance);
2366 megasas_shutdown_controller(instance);
2369 * Take the instance off the instance array. Note that we will not
2370 * decrement the max_index. We let this array be sparse array
2372 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2373 if (megasas_mgmt_info.instance[i] == instance) {
2374 megasas_mgmt_info.count--;
2375 megasas_mgmt_info.instance[i] = NULL;
2381 pci_set_drvdata(instance->pdev, NULL);
2383 megasas_disable_intr(instance);
2385 free_irq(instance->pdev->irq, instance);
2387 megasas_release_mfi(instance);
2389 pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
2390 instance->evt_detail, instance->evt_detail_h);
2392 pci_free_consistent(pdev, sizeof(u32), instance->producer,
2393 instance->producer_h);
2395 pci_free_consistent(pdev, sizeof(u32), instance->consumer,
2396 instance->consumer_h);
2398 scsi_host_put(host);
2400 pci_set_drvdata(pdev, NULL);
2402 pci_disable_device(pdev);
2408 * megasas_shutdown - Shutdown entry point
2409 * @device: Generic device structure
2411 static void megasas_shutdown(struct pci_dev *pdev)
2413 struct megasas_instance *instance = pci_get_drvdata(pdev);
2414 megasas_flush_cache(instance);
2418 * megasas_mgmt_open - char node "open" entry point
2420 static int megasas_mgmt_open(struct inode *inode, struct file *filep)
2423 * Allow only those users with admin rights
2425 if (!capable(CAP_SYS_ADMIN))
2432 * megasas_mgmt_release - char node "release" entry point
2434 static int megasas_mgmt_release(struct inode *inode, struct file *filep)
2436 filep->private_data = NULL;
2437 fasync_helper(-1, filep, 0, &megasas_async_queue);
2443 * megasas_mgmt_fasync - Async notifier registration from applications
2445 * This function adds the calling process to a driver global queue. When an
2446 * event occurs, SIGIO will be sent to all processes in this queue.
2448 static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
2452 mutex_lock(&megasas_async_queue_mutex);
2454 rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
2456 mutex_unlock(&megasas_async_queue_mutex);
2459 /* For sanity check when we get ioctl */
2460 filep->private_data = filep;
2464 printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
2470 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2471 * @instance: Adapter soft state
2472 * @argp: User's ioctl packet
2475 megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
2476 struct megasas_iocpacket __user * user_ioc,
2477 struct megasas_iocpacket *ioc)
2479 struct megasas_sge32 *kern_sge32;
2480 struct megasas_cmd *cmd;
2481 void *kbuff_arr[MAX_IOCTL_SGE];
2482 dma_addr_t buf_handle = 0;
2485 dma_addr_t sense_handle;
2488 memset(kbuff_arr, 0, sizeof(kbuff_arr));
2490 if (ioc->sge_count > MAX_IOCTL_SGE) {
2491 printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n",
2492 ioc->sge_count, MAX_IOCTL_SGE);
2496 cmd = megasas_get_cmd(instance);
2498 printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
2503 * User's IOCTL packet has 2 frames (maximum). Copy those two
2504 * frames into our cmd's frames. cmd->frame's context will get
2505 * overwritten when we copy from user's frames. So set that value
2508 memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
2509 cmd->frame->hdr.context = cmd->index;
2512 * The management interface between applications and the fw uses
2513 * MFI frames. E.g, RAID configuration changes, LD property changes
2514 * etc are accomplishes through different kinds of MFI frames. The
2515 * driver needs to care only about substituting user buffers with
2516 * kernel buffers in SGLs. The location of SGL is embedded in the
2517 * struct iocpacket itself.
2519 kern_sge32 = (struct megasas_sge32 *)
2520 ((unsigned long)cmd->frame + ioc->sgl_off);
2523 * For each user buffer, create a mirror buffer and copy in
2525 for (i = 0; i < ioc->sge_count; i++) {
2526 kbuff_arr[i] = pci_alloc_consistent(instance->pdev,
2527 ioc->sgl[i].iov_len,
2529 if (!kbuff_arr[i]) {
2530 printk(KERN_DEBUG "megasas: Failed to alloc "
2531 "kernel SGL buffer for IOCTL \n");
2537 * We don't change the dma_coherent_mask, so
2538 * pci_alloc_consistent only returns 32bit addresses
2540 kern_sge32[i].phys_addr = (u32) buf_handle;
2541 kern_sge32[i].length = ioc->sgl[i].iov_len;
2544 * We created a kernel buffer corresponding to the
2545 * user buffer. Now copy in from the user buffer
2547 if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
2548 (u32) (ioc->sgl[i].iov_len))) {
2554 if (ioc->sense_len) {
2555 sense = pci_alloc_consistent(instance->pdev, ioc->sense_len,
2563 (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
2564 *sense_ptr = sense_handle;
2568 * Set the sync_cmd flag so that the ISR knows not to complete this
2569 * cmd to the SCSI mid-layer
2572 megasas_issue_blocked_cmd(instance, cmd);
2576 * copy out the kernel buffers to user buffers
2578 for (i = 0; i < ioc->sge_count; i++) {
2579 if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
2580 ioc->sgl[i].iov_len)) {
2587 * copy out the sense
2589 if (ioc->sense_len) {
2591 * sense_ptr points to the location that has the user
2592 * sense buffer address
2594 sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
2597 if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
2598 sense, ioc->sense_len)) {
2605 * copy the status codes returned by the fw
2607 if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
2608 &cmd->frame->hdr.cmd_status, sizeof(u8))) {
2609 printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
2615 pci_free_consistent(instance->pdev, ioc->sense_len,
2616 sense, sense_handle);
2619 for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
2620 pci_free_consistent(instance->pdev,
2621 kern_sge32[i].length,
2622 kbuff_arr[i], kern_sge32[i].phys_addr);
2625 megasas_return_cmd(instance, cmd);
2629 static struct megasas_instance *megasas_lookup_instance(u16 host_no)
2633 for (i = 0; i < megasas_mgmt_info.max_index; i++) {
2635 if ((megasas_mgmt_info.instance[i]) &&
2636 (megasas_mgmt_info.instance[i]->host->host_no == host_no))
2637 return megasas_mgmt_info.instance[i];
2643 static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
2645 struct megasas_iocpacket __user *user_ioc =
2646 (struct megasas_iocpacket __user *)arg;
2647 struct megasas_iocpacket *ioc;
2648 struct megasas_instance *instance;
2651 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
2655 if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
2660 instance = megasas_lookup_instance(ioc->host_no);
2667 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
2669 if (down_interruptible(&instance->ioctl_sem)) {
2670 error = -ERESTARTSYS;
2673 error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
2674 up(&instance->ioctl_sem);
2681 static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
2683 struct megasas_instance *instance;
2684 struct megasas_aen aen;
2687 if (file->private_data != file) {
2688 printk(KERN_DEBUG "megasas: fasync_helper was not "
2693 if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
2696 instance = megasas_lookup_instance(aen.host_no);
2701 down(&instance->aen_mutex);
2702 error = megasas_register_aen(instance, aen.seq_num,
2703 aen.class_locale_word);
2704 up(&instance->aen_mutex);
2709 * megasas_mgmt_ioctl - char node ioctl entry point
2712 megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2715 case MEGASAS_IOC_FIRMWARE:
2716 return megasas_mgmt_ioctl_fw(file, arg);
2718 case MEGASAS_IOC_GET_AEN:
2719 return megasas_mgmt_ioctl_aen(file, arg);
2725 #ifdef CONFIG_COMPAT
2726 static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
2728 struct compat_megasas_iocpacket __user *cioc =
2729 (struct compat_megasas_iocpacket __user *)arg;
2730 struct megasas_iocpacket __user *ioc =
2731 compat_alloc_user_space(sizeof(struct megasas_iocpacket));
2735 clear_user(ioc, sizeof(*ioc));
2737 if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
2738 copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
2739 copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
2740 copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
2741 copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
2742 copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
2745 for (i = 0; i < MAX_IOCTL_SGE; i++) {
2748 if (get_user(ptr, &cioc->sgl[i].iov_base) ||
2749 put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
2750 copy_in_user(&ioc->sgl[i].iov_len,
2751 &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
2755 error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
2757 if (copy_in_user(&cioc->frame.hdr.cmd_status,
2758 &ioc->frame.hdr.cmd_status, sizeof(u8))) {
2759 printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
2766 megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
2770 case MEGASAS_IOC_FIRMWARE32:
2771 return megasas_mgmt_compat_ioctl_fw(file, arg);
2772 case MEGASAS_IOC_GET_AEN:
2773 return megasas_mgmt_ioctl_aen(file, arg);
2781 * File operations structure for management interface
2783 static struct file_operations megasas_mgmt_fops = {
2784 .owner = THIS_MODULE,
2785 .open = megasas_mgmt_open,
2786 .release = megasas_mgmt_release,
2787 .fasync = megasas_mgmt_fasync,
2788 .unlocked_ioctl = megasas_mgmt_ioctl,
2789 #ifdef CONFIG_COMPAT
2790 .compat_ioctl = megasas_mgmt_compat_ioctl,
2795 * PCI hotplug support registration structure
2797 static struct pci_driver megasas_pci_driver = {
2799 .name = "megaraid_sas",
2800 .id_table = megasas_pci_table,
2801 .probe = megasas_probe_one,
2802 .remove = __devexit_p(megasas_detach_one),
2803 .shutdown = megasas_shutdown,
2807 * Sysfs driver attributes
2809 static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
2811 return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
2815 static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
2818 megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
2820 return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
2824 static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
2828 * megasas_init - Driver load entry point
2830 static int __init megasas_init(void)
2835 * Announce driver version and other information
2837 printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
2838 MEGASAS_EXT_VERSION);
2840 memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
2843 * Register character device node
2845 rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
2848 printk(KERN_DEBUG "megasas: failed to open device node\n");
2852 megasas_mgmt_majorno = rval;
2855 * Register ourselves as PCI hotplug module
2857 rval = pci_module_init(&megasas_pci_driver);
2860 printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
2861 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
2864 driver_create_file(&megasas_pci_driver.driver, &driver_attr_version);
2865 driver_create_file(&megasas_pci_driver.driver,
2866 &driver_attr_release_date);
2872 * megasas_exit - Driver unload entry point
2874 static void __exit megasas_exit(void)
2876 driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
2877 driver_remove_file(&megasas_pci_driver.driver,
2878 &driver_attr_release_date);
2880 pci_unregister_driver(&megasas_pci_driver);
2881 unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
2884 module_init(megasas_init);
2885 module_exit(megasas_exit);