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
);