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
[] = {
56 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_SAS1064R
)},
58 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_SAS1078R
)},
60 {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC
, PCI_DEVICE_ID_LSI_VERDE_ZCR
)},
61 /* xscale IOP, vega */
62 {PCI_DEVICE(PCI_VENDOR_ID_DELL
, PCI_DEVICE_ID_DELL_PERC5
)},
67 MODULE_DEVICE_TABLE(pci
, megasas_pci_table
);
69 static int megasas_mgmt_majorno
;
70 static struct megasas_mgmt_info megasas_mgmt_info
;
71 static struct fasync_struct
*megasas_async_queue
;
72 static DEFINE_MUTEX(megasas_async_queue_mutex
);
75 * megasas_get_cmd - Get a command from the free pool
76 * @instance: Adapter soft state
78 * Returns a free command from the pool
80 static struct megasas_cmd
*megasas_get_cmd(struct megasas_instance
84 struct megasas_cmd
*cmd
= NULL
;
86 spin_lock_irqsave(&instance
->cmd_pool_lock
, flags
);
88 if (!list_empty(&instance
->cmd_pool
)) {
89 cmd
= list_entry((&instance
->cmd_pool
)->next
,
90 struct megasas_cmd
, list
);
91 list_del_init(&cmd
->list
);
93 printk(KERN_ERR
"megasas: Command pool empty!\n");
96 spin_unlock_irqrestore(&instance
->cmd_pool_lock
, flags
);
101 * megasas_return_cmd - Return a cmd to free command pool
102 * @instance: Adapter soft state
103 * @cmd: Command packet to be returned to free command pool
106 megasas_return_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
110 spin_lock_irqsave(&instance
->cmd_pool_lock
, flags
);
113 list_add_tail(&cmd
->list
, &instance
->cmd_pool
);
115 spin_unlock_irqrestore(&instance
->cmd_pool_lock
, flags
);
120 * The following functions are defined for xscale
121 * (deviceid : 1064R, PERC5) controllers
125 * megasas_enable_intr_xscale - Enables interrupts
126 * @regs: MFI register set
129 megasas_enable_intr_xscale(struct megasas_register_set __iomem
* regs
)
131 writel(1, &(regs
)->outbound_intr_mask
);
133 /* Dummy readl to force pci flush */
134 readl(®s
->outbound_intr_mask
);
138 * megasas_read_fw_status_reg_xscale - returns the current FW status value
139 * @regs: MFI register set
142 megasas_read_fw_status_reg_xscale(struct megasas_register_set __iomem
* regs
)
144 return readl(&(regs
)->outbound_msg_0
);
147 * megasas_clear_interrupt_xscale - Check & clear interrupt
148 * @regs: MFI register set
151 megasas_clear_intr_xscale(struct megasas_register_set __iomem
* regs
)
155 * Check if it is our interrupt
157 status
= readl(®s
->outbound_intr_status
);
159 if (!(status
& MFI_OB_INTR_STATUS_MASK
)) {
164 * Clear the interrupt by writing back the same value
166 writel(status
, ®s
->outbound_intr_status
);
172 * megasas_fire_cmd_xscale - Sends command to the FW
173 * @frame_phys_addr : Physical address of cmd
174 * @frame_count : Number of frames for the command
175 * @regs : MFI register set
178 megasas_fire_cmd_xscale(dma_addr_t frame_phys_addr
,u32 frame_count
, struct megasas_register_set __iomem
*regs
)
180 writel((frame_phys_addr
>> 3)|(frame_count
),
181 &(regs
)->inbound_queue_port
);
184 static struct megasas_instance_template megasas_instance_template_xscale
= {
186 .fire_cmd
= megasas_fire_cmd_xscale
,
187 .enable_intr
= megasas_enable_intr_xscale
,
188 .clear_intr
= megasas_clear_intr_xscale
,
189 .read_fw_status_reg
= megasas_read_fw_status_reg_xscale
,
193 * This is the end of set of functions & definitions specific
194 * to xscale (deviceid : 1064R, PERC5) controllers
198 * The following functions are defined for ppc (deviceid : 0x60)
203 * megasas_enable_intr_ppc - Enables interrupts
204 * @regs: MFI register set
207 megasas_enable_intr_ppc(struct megasas_register_set __iomem
* regs
)
209 writel(0xFFFFFFFF, &(regs
)->outbound_doorbell_clear
);
211 writel(~0x80000004, &(regs
)->outbound_intr_mask
);
213 /* Dummy readl to force pci flush */
214 readl(®s
->outbound_intr_mask
);
218 * megasas_read_fw_status_reg_ppc - returns the current FW status value
219 * @regs: MFI register set
222 megasas_read_fw_status_reg_ppc(struct megasas_register_set __iomem
* regs
)
224 return readl(&(regs
)->outbound_scratch_pad
);
228 * megasas_clear_interrupt_ppc - Check & clear interrupt
229 * @regs: MFI register set
232 megasas_clear_intr_ppc(struct megasas_register_set __iomem
* regs
)
236 * Check if it is our interrupt
238 status
= readl(®s
->outbound_intr_status
);
240 if (!(status
& MFI_REPLY_1078_MESSAGE_INTERRUPT
)) {
245 * Clear the interrupt by writing back the same value
247 writel(status
, ®s
->outbound_doorbell_clear
);
252 * megasas_fire_cmd_ppc - Sends command to the FW
253 * @frame_phys_addr : Physical address of cmd
254 * @frame_count : Number of frames for the command
255 * @regs : MFI register set
258 megasas_fire_cmd_ppc(dma_addr_t frame_phys_addr
, u32 frame_count
, struct megasas_register_set __iomem
*regs
)
260 writel((frame_phys_addr
| (frame_count
<<1))|1,
261 &(regs
)->inbound_queue_port
);
264 static struct megasas_instance_template megasas_instance_template_ppc
= {
266 .fire_cmd
= megasas_fire_cmd_ppc
,
267 .enable_intr
= megasas_enable_intr_ppc
,
268 .clear_intr
= megasas_clear_intr_ppc
,
269 .read_fw_status_reg
= megasas_read_fw_status_reg_ppc
,
273 * This is the end of set of functions & definitions
274 * specific to ppc (deviceid : 0x60) controllers
278 * megasas_disable_intr - Disables interrupts
279 * @regs: MFI register set
282 megasas_disable_intr(struct megasas_instance
*instance
)
285 struct megasas_register_set __iomem
*regs
= instance
->reg_set
;
287 if(instance
->pdev
->device
== PCI_DEVICE_ID_LSI_SAS1078R
)
290 writel(mask
, ®s
->outbound_intr_mask
);
292 /* Dummy readl to force pci flush */
293 readl(®s
->outbound_intr_mask
);
297 * megasas_issue_polled - Issues a polling command
298 * @instance: Adapter soft state
299 * @cmd: Command packet to be issued
301 * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
304 megasas_issue_polled(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
307 u32 msecs
= MFI_POLL_TIMEOUT_SECS
* 1000;
309 struct megasas_header
*frame_hdr
= &cmd
->frame
->hdr
;
311 frame_hdr
->cmd_status
= 0xFF;
312 frame_hdr
->flags
|= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE
;
315 * Issue the frame using inbound queue port
317 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
320 * Wait for cmd_status to change
322 for (i
= 0; (i
< msecs
) && (frame_hdr
->cmd_status
== 0xff); i
++) {
327 if (frame_hdr
->cmd_status
== 0xff)
334 * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
335 * @instance: Adapter soft state
336 * @cmd: Command to be issued
338 * This function waits on an event for the command to be returned from ISR.
339 * Used to issue ioctl commands.
342 megasas_issue_blocked_cmd(struct megasas_instance
*instance
,
343 struct megasas_cmd
*cmd
)
345 cmd
->cmd_status
= ENODATA
;
347 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
349 wait_event(instance
->int_cmd_wait_q
, (cmd
->cmd_status
!= ENODATA
));
355 * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
356 * @instance: Adapter soft state
357 * @cmd_to_abort: Previously issued cmd to be aborted
359 * MFI firmware can abort previously issued AEN comamnd (automatic event
360 * notification). The megasas_issue_blocked_abort_cmd() issues such abort
361 * cmd and blocks till it is completed.
364 megasas_issue_blocked_abort_cmd(struct megasas_instance
*instance
,
365 struct megasas_cmd
*cmd_to_abort
)
367 struct megasas_cmd
*cmd
;
368 struct megasas_abort_frame
*abort_fr
;
370 cmd
= megasas_get_cmd(instance
);
375 abort_fr
= &cmd
->frame
->abort
;
378 * Prepare and issue the abort frame
380 abort_fr
->cmd
= MFI_CMD_ABORT
;
381 abort_fr
->cmd_status
= 0xFF;
383 abort_fr
->abort_context
= cmd_to_abort
->index
;
384 abort_fr
->abort_mfi_phys_addr_lo
= cmd_to_abort
->frame_phys_addr
;
385 abort_fr
->abort_mfi_phys_addr_hi
= 0;
388 cmd
->cmd_status
= 0xFF;
390 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
393 * Wait for this cmd to complete
395 wait_event(instance
->abort_cmd_wait_q
, (cmd
->cmd_status
!= 0xFF));
397 megasas_return_cmd(instance
, cmd
);
402 * megasas_make_sgl32 - Prepares 32-bit SGL
403 * @instance: Adapter soft state
404 * @scp: SCSI command from the mid-layer
405 * @mfi_sgl: SGL to be filled in
407 * If successful, this function returns the number of SG elements. Otherwise,
411 megasas_make_sgl32(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
412 union megasas_sgl
*mfi_sgl
)
416 struct scatterlist
*os_sgl
;
419 * Return 0 if there is no data transfer
421 if (!scp
->request_buffer
|| !scp
->request_bufflen
)
425 mfi_sgl
->sge32
[0].phys_addr
= pci_map_single(instance
->pdev
,
432 mfi_sgl
->sge32
[0].length
= scp
->request_bufflen
;
437 os_sgl
= (struct scatterlist
*)scp
->request_buffer
;
438 sge_count
= pci_map_sg(instance
->pdev
, os_sgl
, scp
->use_sg
,
439 scp
->sc_data_direction
);
441 for (i
= 0; i
< sge_count
; i
++, os_sgl
++) {
442 mfi_sgl
->sge32
[i
].length
= sg_dma_len(os_sgl
);
443 mfi_sgl
->sge32
[i
].phys_addr
= sg_dma_address(os_sgl
);
450 * megasas_make_sgl64 - Prepares 64-bit SGL
451 * @instance: Adapter soft state
452 * @scp: SCSI command from the mid-layer
453 * @mfi_sgl: SGL to be filled in
455 * If successful, this function returns the number of SG elements. Otherwise,
459 megasas_make_sgl64(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
460 union megasas_sgl
*mfi_sgl
)
464 struct scatterlist
*os_sgl
;
467 * Return 0 if there is no data transfer
469 if (!scp
->request_buffer
|| !scp
->request_bufflen
)
473 mfi_sgl
->sge64
[0].phys_addr
= pci_map_single(instance
->pdev
,
481 mfi_sgl
->sge64
[0].length
= scp
->request_bufflen
;
486 os_sgl
= (struct scatterlist
*)scp
->request_buffer
;
487 sge_count
= pci_map_sg(instance
->pdev
, os_sgl
, scp
->use_sg
,
488 scp
->sc_data_direction
);
490 for (i
= 0; i
< sge_count
; i
++, os_sgl
++) {
491 mfi_sgl
->sge64
[i
].length
= sg_dma_len(os_sgl
);
492 mfi_sgl
->sge64
[i
].phys_addr
= sg_dma_address(os_sgl
);
499 * megasas_get_frame_count - Computes the number of frames
500 * @sge_count : number of sg elements
502 * Returns the number of frames required for numnber of sge's (sge_count)
505 u32
megasas_get_frame_count(u8 sge_count
)
512 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
513 sizeof(struct megasas_sge32
);
516 * Main frame can contain 2 SGEs for 64-bit SGLs and
517 * 3 SGEs for 32-bit SGLs
520 num_cnt
= sge_count
- 2;
522 num_cnt
= sge_count
- 3;
525 sge_bytes
= sge_sz
* num_cnt
;
527 frame_count
= (sge_bytes
/ MEGAMFI_FRAME_SIZE
) +
528 ((sge_bytes
% MEGAMFI_FRAME_SIZE
) ? 1 : 0) ;
539 * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
540 * @instance: Adapter soft state
542 * @cmd: Command to be prepared in
544 * This function prepares CDB commands. These are typcially pass-through
545 * commands to the devices.
548 megasas_build_dcdb(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
549 struct megasas_cmd
*cmd
)
554 struct megasas_pthru_frame
*pthru
;
556 is_logical
= MEGASAS_IS_LOGICAL(scp
);
557 device_id
= MEGASAS_DEV_INDEX(instance
, scp
);
558 pthru
= (struct megasas_pthru_frame
*)cmd
->frame
;
560 if (scp
->sc_data_direction
== PCI_DMA_TODEVICE
)
561 flags
= MFI_FRAME_DIR_WRITE
;
562 else if (scp
->sc_data_direction
== PCI_DMA_FROMDEVICE
)
563 flags
= MFI_FRAME_DIR_READ
;
564 else if (scp
->sc_data_direction
== PCI_DMA_NONE
)
565 flags
= MFI_FRAME_DIR_NONE
;
568 * Prepare the DCDB frame
570 pthru
->cmd
= (is_logical
) ? MFI_CMD_LD_SCSI_IO
: MFI_CMD_PD_SCSI_IO
;
571 pthru
->cmd_status
= 0x0;
572 pthru
->scsi_status
= 0x0;
573 pthru
->target_id
= device_id
;
574 pthru
->lun
= scp
->device
->lun
;
575 pthru
->cdb_len
= scp
->cmd_len
;
577 pthru
->flags
= flags
;
578 pthru
->data_xfer_len
= scp
->request_bufflen
;
580 memcpy(pthru
->cdb
, scp
->cmnd
, scp
->cmd_len
);
586 pthru
->flags
|= MFI_FRAME_SGL64
;
587 pthru
->sge_count
= megasas_make_sgl64(instance
, scp
,
590 pthru
->sge_count
= megasas_make_sgl32(instance
, scp
,
594 * Sense info specific
596 pthru
->sense_len
= SCSI_SENSE_BUFFERSIZE
;
597 pthru
->sense_buf_phys_addr_hi
= 0;
598 pthru
->sense_buf_phys_addr_lo
= cmd
->sense_phys_addr
;
601 * Compute the total number of frames this command consumes. FW uses
602 * this number to pull sufficient number of frames from host memory.
604 cmd
->frame_count
= megasas_get_frame_count(pthru
->sge_count
);
606 return cmd
->frame_count
;
610 * megasas_build_ldio - Prepares IOs to logical devices
611 * @instance: Adapter soft state
613 * @cmd: Command to to be prepared
615 * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
618 megasas_build_ldio(struct megasas_instance
*instance
, struct scsi_cmnd
*scp
,
619 struct megasas_cmd
*cmd
)
622 u8 sc
= scp
->cmnd
[0];
624 struct megasas_io_frame
*ldio
;
626 device_id
= MEGASAS_DEV_INDEX(instance
, scp
);
627 ldio
= (struct megasas_io_frame
*)cmd
->frame
;
629 if (scp
->sc_data_direction
== PCI_DMA_TODEVICE
)
630 flags
= MFI_FRAME_DIR_WRITE
;
631 else if (scp
->sc_data_direction
== PCI_DMA_FROMDEVICE
)
632 flags
= MFI_FRAME_DIR_READ
;
635 * Prepare the Logical IO frame: 2nd bit is zero for all read cmds
637 ldio
->cmd
= (sc
& 0x02) ? MFI_CMD_LD_WRITE
: MFI_CMD_LD_READ
;
638 ldio
->cmd_status
= 0x0;
639 ldio
->scsi_status
= 0x0;
640 ldio
->target_id
= device_id
;
642 ldio
->reserved_0
= 0;
645 ldio
->start_lba_hi
= 0;
646 ldio
->access_byte
= (scp
->cmd_len
!= 6) ? scp
->cmnd
[1] : 0;
649 * 6-byte READ(0x08) or WRITE(0x0A) cdb
651 if (scp
->cmd_len
== 6) {
652 ldio
->lba_count
= (u32
) scp
->cmnd
[4];
653 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[1] << 16) |
654 ((u32
) scp
->cmnd
[2] << 8) | (u32
) scp
->cmnd
[3];
656 ldio
->start_lba_lo
&= 0x1FFFFF;
660 * 10-byte READ(0x28) or WRITE(0x2A) cdb
662 else if (scp
->cmd_len
== 10) {
663 ldio
->lba_count
= (u32
) scp
->cmnd
[8] |
664 ((u32
) scp
->cmnd
[7] << 8);
665 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[2] << 24) |
666 ((u32
) scp
->cmnd
[3] << 16) |
667 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
671 * 12-byte READ(0xA8) or WRITE(0xAA) cdb
673 else if (scp
->cmd_len
== 12) {
674 ldio
->lba_count
= ((u32
) scp
->cmnd
[6] << 24) |
675 ((u32
) scp
->cmnd
[7] << 16) |
676 ((u32
) scp
->cmnd
[8] << 8) | (u32
) scp
->cmnd
[9];
678 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[2] << 24) |
679 ((u32
) scp
->cmnd
[3] << 16) |
680 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
684 * 16-byte READ(0x88) or WRITE(0x8A) cdb
686 else if (scp
->cmd_len
== 16) {
687 ldio
->lba_count
= ((u32
) scp
->cmnd
[10] << 24) |
688 ((u32
) scp
->cmnd
[11] << 16) |
689 ((u32
) scp
->cmnd
[12] << 8) | (u32
) scp
->cmnd
[13];
691 ldio
->start_lba_lo
= ((u32
) scp
->cmnd
[6] << 24) |
692 ((u32
) scp
->cmnd
[7] << 16) |
693 ((u32
) scp
->cmnd
[8] << 8) | (u32
) scp
->cmnd
[9];
695 ldio
->start_lba_hi
= ((u32
) scp
->cmnd
[2] << 24) |
696 ((u32
) scp
->cmnd
[3] << 16) |
697 ((u32
) scp
->cmnd
[4] << 8) | (u32
) scp
->cmnd
[5];
705 ldio
->flags
|= MFI_FRAME_SGL64
;
706 ldio
->sge_count
= megasas_make_sgl64(instance
, scp
, &ldio
->sgl
);
708 ldio
->sge_count
= megasas_make_sgl32(instance
, scp
, &ldio
->sgl
);
711 * Sense info specific
713 ldio
->sense_len
= SCSI_SENSE_BUFFERSIZE
;
714 ldio
->sense_buf_phys_addr_hi
= 0;
715 ldio
->sense_buf_phys_addr_lo
= cmd
->sense_phys_addr
;
718 * Compute the total number of frames this command consumes. FW uses
719 * this number to pull sufficient number of frames from host memory.
721 cmd
->frame_count
= megasas_get_frame_count(ldio
->sge_count
);
723 return cmd
->frame_count
;
727 * megasas_is_ldio - Checks if the cmd is for logical drive
728 * @scmd: SCSI command
730 * Called by megasas_queue_command to find out if the command to be queued
731 * is a logical drive command
733 static inline int megasas_is_ldio(struct scsi_cmnd
*cmd
)
735 if (!MEGASAS_IS_LOGICAL(cmd
))
737 switch (cmd
->cmnd
[0]) {
753 * megasas_queue_command - Queue entry point
754 * @scmd: SCSI command to be queued
755 * @done: Callback entry point
758 megasas_queue_command(struct scsi_cmnd
*scmd
, void (*done
) (struct scsi_cmnd
*))
761 struct megasas_cmd
*cmd
;
762 struct megasas_instance
*instance
;
764 instance
= (struct megasas_instance
*)
765 scmd
->device
->host
->hostdata
;
766 scmd
->scsi_done
= done
;
769 if (MEGASAS_IS_LOGICAL(scmd
) &&
770 (scmd
->device
->id
>= MEGASAS_MAX_LD
|| scmd
->device
->lun
)) {
771 scmd
->result
= DID_BAD_TARGET
<< 16;
775 cmd
= megasas_get_cmd(instance
);
777 return SCSI_MLQUEUE_HOST_BUSY
;
780 * Logical drive command
782 if (megasas_is_ldio(scmd
))
783 frame_count
= megasas_build_ldio(instance
, scmd
, cmd
);
785 frame_count
= megasas_build_dcdb(instance
, scmd
, cmd
);
793 * Issue the command to the FW
795 atomic_inc(&instance
->fw_outstanding
);
797 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,cmd
->frame_count
-1,instance
->reg_set
);
802 megasas_return_cmd(instance
, cmd
);
808 static int megasas_slave_configure(struct scsi_device
*sdev
)
811 * Don't export physical disk devices to the disk driver.
813 * FIXME: Currently we don't export them to the midlayer at all.
814 * That will be fixed once LSI engineers have audited the
815 * firmware for possible issues.
817 if (sdev
->channel
< MEGASAS_MAX_PD_CHANNELS
&& sdev
->type
== TYPE_DISK
)
821 * The RAID firmware may require extended timeouts.
823 if (sdev
->channel
>= MEGASAS_MAX_PD_CHANNELS
)
824 sdev
->timeout
= 90 * HZ
;
829 * megasas_wait_for_outstanding - Wait for all outstanding cmds
830 * @instance: Adapter soft state
832 * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
833 * complete all its outstanding commands. Returns error if one or more IOs
834 * are pending after this time period. It also marks the controller dead.
836 static int megasas_wait_for_outstanding(struct megasas_instance
*instance
)
839 u32 wait_time
= MEGASAS_RESET_WAIT_TIME
;
841 for (i
= 0; i
< wait_time
; i
++) {
843 int outstanding
= atomic_read(&instance
->fw_outstanding
);
848 if (!(i
% MEGASAS_RESET_NOTICE_INTERVAL
)) {
849 printk(KERN_NOTICE
"megasas: [%2d]waiting for %d "
850 "commands to complete\n",i
,outstanding
);
856 if (atomic_read(&instance
->fw_outstanding
)) {
858 * Send signal to FW to stop processing any pending cmds.
859 * The controller will be taken offline by the OS now.
862 &instance
->reg_set
->inbound_doorbell
);
863 instance
->hw_crit_error
= 1;
871 * megasas_generic_reset - Generic reset routine
872 * @scmd: Mid-layer SCSI command
874 * This routine implements a generic reset handler for device, bus and host
875 * reset requests. Device, bus and host specific reset handlers can use this
876 * function after they do their specific tasks.
878 static int megasas_generic_reset(struct scsi_cmnd
*scmd
)
881 struct megasas_instance
*instance
;
883 instance
= (struct megasas_instance
*)scmd
->device
->host
->hostdata
;
885 scmd_printk(KERN_NOTICE
, scmd
, "megasas: RESET -%ld cmd=%x\n",
886 scmd
->serial_number
, scmd
->cmnd
[0]);
888 if (instance
->hw_crit_error
) {
889 printk(KERN_ERR
"megasas: cannot recover from previous reset "
894 ret_val
= megasas_wait_for_outstanding(instance
);
895 if (ret_val
== SUCCESS
)
896 printk(KERN_NOTICE
"megasas: reset successful \n");
898 printk(KERN_ERR
"megasas: failed to do reset\n");
904 * megasas_reset_device - Device reset handler entry point
906 static int megasas_reset_device(struct scsi_cmnd
*scmd
)
911 * First wait for all commands to complete
913 ret
= megasas_generic_reset(scmd
);
919 * megasas_reset_bus_host - Bus & host reset handler entry point
921 static int megasas_reset_bus_host(struct scsi_cmnd
*scmd
)
926 * First wait for all commands to complete
928 ret
= megasas_generic_reset(scmd
);
934 * megasas_service_aen - Processes an event notification
935 * @instance: Adapter soft state
936 * @cmd: AEN command completed by the ISR
938 * For AEN, driver sends a command down to FW that is held by the FW till an
939 * event occurs. When an event of interest occurs, FW completes the command
940 * that it was previously holding.
942 * This routines sends SIGIO signal to processes that have registered with the
946 megasas_service_aen(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
949 * Don't signal app if it is just an aborted previously registered aen
952 kill_fasync(&megasas_async_queue
, SIGIO
, POLL_IN
);
956 instance
->aen_cmd
= NULL
;
957 megasas_return_cmd(instance
, cmd
);
961 * Scsi host template for megaraid_sas driver
963 static struct scsi_host_template megasas_template
= {
965 .module
= THIS_MODULE
,
966 .name
= "LSI Logic SAS based MegaRAID driver",
967 .proc_name
= "megaraid_sas",
968 .slave_configure
= megasas_slave_configure
,
969 .queuecommand
= megasas_queue_command
,
970 .eh_device_reset_handler
= megasas_reset_device
,
971 .eh_bus_reset_handler
= megasas_reset_bus_host
,
972 .eh_host_reset_handler
= megasas_reset_bus_host
,
973 .use_clustering
= ENABLE_CLUSTERING
,
977 * megasas_complete_int_cmd - Completes an internal command
978 * @instance: Adapter soft state
979 * @cmd: Command to be completed
981 * The megasas_issue_blocked_cmd() function waits for a command to complete
982 * after it issues a command. This function wakes up that waiting routine by
983 * calling wake_up() on the wait queue.
986 megasas_complete_int_cmd(struct megasas_instance
*instance
,
987 struct megasas_cmd
*cmd
)
989 cmd
->cmd_status
= cmd
->frame
->io
.cmd_status
;
991 if (cmd
->cmd_status
== ENODATA
) {
994 wake_up(&instance
->int_cmd_wait_q
);
998 * megasas_complete_abort - Completes aborting a command
999 * @instance: Adapter soft state
1000 * @cmd: Cmd that was issued to abort another cmd
1002 * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
1003 * after it issues an abort on a previously issued command. This function
1004 * wakes up all functions waiting on the same wait queue.
1007 megasas_complete_abort(struct megasas_instance
*instance
,
1008 struct megasas_cmd
*cmd
)
1010 if (cmd
->sync_cmd
) {
1012 cmd
->cmd_status
= 0;
1013 wake_up(&instance
->abort_cmd_wait_q
);
1020 * megasas_unmap_sgbuf - Unmap SG buffers
1021 * @instance: Adapter soft state
1022 * @cmd: Completed command
1025 megasas_unmap_sgbuf(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
)
1030 if (cmd
->scmd
->use_sg
) {
1031 pci_unmap_sg(instance
->pdev
, cmd
->scmd
->request_buffer
,
1032 cmd
->scmd
->use_sg
, cmd
->scmd
->sc_data_direction
);
1036 if (!cmd
->scmd
->request_bufflen
)
1039 opcode
= cmd
->frame
->hdr
.cmd
;
1041 if ((opcode
== MFI_CMD_LD_READ
) || (opcode
== MFI_CMD_LD_WRITE
)) {
1043 buf_h
= cmd
->frame
->io
.sgl
.sge64
[0].phys_addr
;
1045 buf_h
= cmd
->frame
->io
.sgl
.sge32
[0].phys_addr
;
1048 buf_h
= cmd
->frame
->pthru
.sgl
.sge64
[0].phys_addr
;
1050 buf_h
= cmd
->frame
->pthru
.sgl
.sge32
[0].phys_addr
;
1053 pci_unmap_single(instance
->pdev
, buf_h
, cmd
->scmd
->request_bufflen
,
1054 cmd
->scmd
->sc_data_direction
);
1059 * megasas_complete_cmd - Completes a command
1060 * @instance: Adapter soft state
1061 * @cmd: Command to be completed
1062 * @alt_status: If non-zero, use this value as status to
1063 * SCSI mid-layer instead of the value returned
1064 * by the FW. This should be used if caller wants
1065 * an alternate status (as in the case of aborted
1069 megasas_complete_cmd(struct megasas_instance
*instance
, struct megasas_cmd
*cmd
,
1073 struct megasas_header
*hdr
= &cmd
->frame
->hdr
;
1076 cmd
->scmd
->SCp
.ptr
= (char *)0;
1081 case MFI_CMD_PD_SCSI_IO
:
1082 case MFI_CMD_LD_SCSI_IO
:
1085 * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
1086 * issued either through an IO path or an IOCTL path. If it
1087 * was via IOCTL, we will send it to internal completion.
1089 if (cmd
->sync_cmd
) {
1091 megasas_complete_int_cmd(instance
, cmd
);
1095 case MFI_CMD_LD_READ
:
1096 case MFI_CMD_LD_WRITE
:
1099 cmd
->scmd
->result
= alt_status
<< 16;
1105 atomic_dec(&instance
->fw_outstanding
);
1107 megasas_unmap_sgbuf(instance
, cmd
);
1108 cmd
->scmd
->scsi_done(cmd
->scmd
);
1109 megasas_return_cmd(instance
, cmd
);
1114 switch (hdr
->cmd_status
) {
1117 cmd
->scmd
->result
= DID_OK
<< 16;
1120 case MFI_STAT_SCSI_IO_FAILED
:
1121 case MFI_STAT_LD_INIT_IN_PROGRESS
:
1123 (DID_ERROR
<< 16) | hdr
->scsi_status
;
1126 case MFI_STAT_SCSI_DONE_WITH_ERROR
:
1128 cmd
->scmd
->result
= (DID_OK
<< 16) | hdr
->scsi_status
;
1130 if (hdr
->scsi_status
== SAM_STAT_CHECK_CONDITION
) {
1131 memset(cmd
->scmd
->sense_buffer
, 0,
1132 SCSI_SENSE_BUFFERSIZE
);
1133 memcpy(cmd
->scmd
->sense_buffer
, cmd
->sense
,
1136 cmd
->scmd
->result
|= DRIVER_SENSE
<< 24;
1141 case MFI_STAT_LD_OFFLINE
:
1142 case MFI_STAT_DEVICE_NOT_FOUND
:
1143 cmd
->scmd
->result
= DID_BAD_TARGET
<< 16;
1147 printk(KERN_DEBUG
"megasas: MFI FW status %#x\n",
1149 cmd
->scmd
->result
= DID_ERROR
<< 16;
1153 atomic_dec(&instance
->fw_outstanding
);
1155 megasas_unmap_sgbuf(instance
, cmd
);
1156 cmd
->scmd
->scsi_done(cmd
->scmd
);
1157 megasas_return_cmd(instance
, cmd
);
1166 * See if got an event notification
1168 if (cmd
->frame
->dcmd
.opcode
== MR_DCMD_CTRL_EVENT_WAIT
)
1169 megasas_service_aen(instance
, cmd
);
1171 megasas_complete_int_cmd(instance
, cmd
);
1177 * Cmd issued to abort another cmd returned
1179 megasas_complete_abort(instance
, cmd
);
1183 printk("megasas: Unknown command completed! [0x%X]\n",
1190 * megasas_deplete_reply_queue - Processes all completed commands
1191 * @instance: Adapter soft state
1192 * @alt_status: Alternate status to be returned to
1193 * SCSI mid-layer instead of the status
1194 * returned by the FW
1197 megasas_deplete_reply_queue(struct megasas_instance
*instance
, u8 alt_status
)
1202 struct megasas_cmd
*cmd
;
1205 * Check if it is our interrupt
1206 * Clear the interrupt
1208 if(instance
->instancet
->clear_intr(instance
->reg_set
))
1211 producer
= *instance
->producer
;
1212 consumer
= *instance
->consumer
;
1214 while (consumer
!= producer
) {
1215 context
= instance
->reply_queue
[consumer
];
1217 cmd
= instance
->cmd_list
[context
];
1219 megasas_complete_cmd(instance
, cmd
, alt_status
);
1222 if (consumer
== (instance
->max_fw_cmds
+ 1)) {
1227 *instance
->consumer
= producer
;
1233 * megasas_isr - isr entry point
1235 static irqreturn_t
megasas_isr(int irq
, void *devp
, struct pt_regs
*regs
)
1237 return megasas_deplete_reply_queue((struct megasas_instance
*)devp
,
1242 * megasas_transition_to_ready - Move the FW to READY state
1243 * @instance: Adapter soft state
1245 * During the initialization, FW passes can potentially be in any one of
1246 * several possible states. If the FW in operational, waiting-for-handshake
1247 * states, driver must take steps to bring it to ready state. Otherwise, it
1248 * has to wait for the ready state.
1251 megasas_transition_to_ready(struct megasas_instance
* instance
)
1258 fw_state
= instance
->instancet
->read_fw_status_reg(instance
->reg_set
) & MFI_STATE_MASK
;
1260 if (fw_state
!= MFI_STATE_READY
)
1261 printk(KERN_INFO
"megasas: Waiting for FW to come to ready"
1264 while (fw_state
!= MFI_STATE_READY
) {
1268 case MFI_STATE_FAULT
:
1270 printk(KERN_DEBUG
"megasas: FW in FAULT state!!\n");
1273 case MFI_STATE_WAIT_HANDSHAKE
:
1275 * Set the CLR bit in inbound doorbell
1277 writel(MFI_INIT_CLEAR_HANDSHAKE
|MFI_INIT_HOTPLUG
,
1278 &instance
->reg_set
->inbound_doorbell
);
1281 cur_state
= MFI_STATE_WAIT_HANDSHAKE
;
1284 case MFI_STATE_BOOT_MESSAGE_PENDING
:
1285 writel(MFI_INIT_HOTPLUG
,
1286 &instance
->reg_set
->inbound_doorbell
);
1289 cur_state
= MFI_STATE_BOOT_MESSAGE_PENDING
;
1292 case MFI_STATE_OPERATIONAL
:
1294 * Bring it to READY state; assuming max wait 10 secs
1296 megasas_disable_intr(instance
);
1297 writel(MFI_RESET_FLAGS
, &instance
->reg_set
->inbound_doorbell
);
1300 cur_state
= MFI_STATE_OPERATIONAL
;
1303 case MFI_STATE_UNDEFINED
:
1305 * This state should not last for more than 2 seconds
1308 cur_state
= MFI_STATE_UNDEFINED
;
1311 case MFI_STATE_BB_INIT
:
1313 cur_state
= MFI_STATE_BB_INIT
;
1316 case MFI_STATE_FW_INIT
:
1318 cur_state
= MFI_STATE_FW_INIT
;
1321 case MFI_STATE_FW_INIT_2
:
1323 cur_state
= MFI_STATE_FW_INIT_2
;
1326 case MFI_STATE_DEVICE_SCAN
:
1328 cur_state
= MFI_STATE_DEVICE_SCAN
;
1331 case MFI_STATE_FLUSH_CACHE
:
1333 cur_state
= MFI_STATE_FLUSH_CACHE
;
1337 printk(KERN_DEBUG
"megasas: Unknown state 0x%x\n",
1343 * The cur_state should not last for more than max_wait secs
1345 for (i
= 0; i
< (max_wait
* 1000); i
++) {
1346 fw_state
= instance
->instancet
->read_fw_status_reg(instance
->reg_set
) &
1349 if (fw_state
== cur_state
) {
1356 * Return error if fw_state hasn't changed after max_wait
1358 if (fw_state
== cur_state
) {
1359 printk(KERN_DEBUG
"FW state [%d] hasn't changed "
1360 "in %d secs\n", fw_state
, max_wait
);
1364 printk(KERN_INFO
"megasas: FW now in Ready state\n");
1370 * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
1371 * @instance: Adapter soft state
1373 static void megasas_teardown_frame_pool(struct megasas_instance
*instance
)
1376 u32 max_cmd
= instance
->max_fw_cmds
;
1377 struct megasas_cmd
*cmd
;
1379 if (!instance
->frame_dma_pool
)
1383 * Return all frames to pool
1385 for (i
= 0; i
< max_cmd
; i
++) {
1387 cmd
= instance
->cmd_list
[i
];
1390 pci_pool_free(instance
->frame_dma_pool
, cmd
->frame
,
1391 cmd
->frame_phys_addr
);
1394 pci_pool_free(instance
->sense_dma_pool
, cmd
->sense
,
1395 cmd
->sense_phys_addr
);
1399 * Now destroy the pool itself
1401 pci_pool_destroy(instance
->frame_dma_pool
);
1402 pci_pool_destroy(instance
->sense_dma_pool
);
1404 instance
->frame_dma_pool
= NULL
;
1405 instance
->sense_dma_pool
= NULL
;
1409 * megasas_create_frame_pool - Creates DMA pool for cmd frames
1410 * @instance: Adapter soft state
1412 * Each command packet has an embedded DMA memory buffer that is used for
1413 * filling MFI frame and the SG list that immediately follows the frame. This
1414 * function creates those DMA memory buffers for each command packet by using
1415 * PCI pool facility.
1417 static int megasas_create_frame_pool(struct megasas_instance
*instance
)
1425 struct megasas_cmd
*cmd
;
1427 max_cmd
= instance
->max_fw_cmds
;
1430 * Size of our frame is 64 bytes for MFI frame, followed by max SG
1431 * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
1433 sge_sz
= (IS_DMA64
) ? sizeof(struct megasas_sge64
) :
1434 sizeof(struct megasas_sge32
);
1437 * Calculated the number of 64byte frames required for SGL
1439 sgl_sz
= sge_sz
* instance
->max_num_sge
;
1440 frame_count
= (sgl_sz
+ MEGAMFI_FRAME_SIZE
- 1) / MEGAMFI_FRAME_SIZE
;
1443 * We need one extra frame for the MFI command
1447 total_sz
= MEGAMFI_FRAME_SIZE
* frame_count
;
1449 * Use DMA pool facility provided by PCI layer
1451 instance
->frame_dma_pool
= pci_pool_create("megasas frame pool",
1452 instance
->pdev
, total_sz
, 64,
1455 if (!instance
->frame_dma_pool
) {
1456 printk(KERN_DEBUG
"megasas: failed to setup frame pool\n");
1460 instance
->sense_dma_pool
= pci_pool_create("megasas sense pool",
1461 instance
->pdev
, 128, 4, 0);
1463 if (!instance
->sense_dma_pool
) {
1464 printk(KERN_DEBUG
"megasas: failed to setup sense pool\n");
1466 pci_pool_destroy(instance
->frame_dma_pool
);
1467 instance
->frame_dma_pool
= NULL
;
1473 * Allocate and attach a frame to each of the commands in cmd_list.
1474 * By making cmd->index as the context instead of the &cmd, we can
1475 * always use 32bit context regardless of the architecture
1477 for (i
= 0; i
< max_cmd
; i
++) {
1479 cmd
= instance
->cmd_list
[i
];
1481 cmd
->frame
= pci_pool_alloc(instance
->frame_dma_pool
,
1482 GFP_KERNEL
, &cmd
->frame_phys_addr
);
1484 cmd
->sense
= pci_pool_alloc(instance
->sense_dma_pool
,
1485 GFP_KERNEL
, &cmd
->sense_phys_addr
);
1488 * megasas_teardown_frame_pool() takes care of freeing
1489 * whatever has been allocated
1491 if (!cmd
->frame
|| !cmd
->sense
) {
1492 printk(KERN_DEBUG
"megasas: pci_pool_alloc failed \n");
1493 megasas_teardown_frame_pool(instance
);
1497 cmd
->frame
->io
.context
= cmd
->index
;
1504 * megasas_free_cmds - Free all the cmds in the free cmd pool
1505 * @instance: Adapter soft state
1507 static void megasas_free_cmds(struct megasas_instance
*instance
)
1510 /* First free the MFI frame pool */
1511 megasas_teardown_frame_pool(instance
);
1513 /* Free all the commands in the cmd_list */
1514 for (i
= 0; i
< instance
->max_fw_cmds
; i
++)
1515 kfree(instance
->cmd_list
[i
]);
1517 /* Free the cmd_list buffer itself */
1518 kfree(instance
->cmd_list
);
1519 instance
->cmd_list
= NULL
;
1521 INIT_LIST_HEAD(&instance
->cmd_pool
);
1525 * megasas_alloc_cmds - Allocates the command packets
1526 * @instance: Adapter soft state
1528 * Each command that is issued to the FW, whether IO commands from the OS or
1529 * internal commands like IOCTLs, are wrapped in local data structure called
1530 * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
1533 * Each frame has a 32-bit field called context (tag). This context is used
1534 * to get back the megasas_cmd from the frame when a frame gets completed in
1535 * the ISR. Typically the address of the megasas_cmd itself would be used as
1536 * the context. But we wanted to keep the differences between 32 and 64 bit
1537 * systems to the mininum. We always use 32 bit integers for the context. In
1538 * this driver, the 32 bit values are the indices into an array cmd_list.
1539 * This array is used only to look up the megasas_cmd given the context. The
1540 * free commands themselves are maintained in a linked list called cmd_pool.
1542 static int megasas_alloc_cmds(struct megasas_instance
*instance
)
1547 struct megasas_cmd
*cmd
;
1549 max_cmd
= instance
->max_fw_cmds
;
1552 * instance->cmd_list is an array of struct megasas_cmd pointers.
1553 * Allocate the dynamic array first and then allocate individual
1556 instance
->cmd_list
= kmalloc(sizeof(struct megasas_cmd
*) * max_cmd
,
1559 if (!instance
->cmd_list
) {
1560 printk(KERN_DEBUG
"megasas: out of memory\n");
1564 memset(instance
->cmd_list
, 0, sizeof(struct megasas_cmd
*) * max_cmd
);
1566 for (i
= 0; i
< max_cmd
; i
++) {
1567 instance
->cmd_list
[i
] = kmalloc(sizeof(struct megasas_cmd
),
1570 if (!instance
->cmd_list
[i
]) {
1572 for (j
= 0; j
< i
; j
++)
1573 kfree(instance
->cmd_list
[j
]);
1575 kfree(instance
->cmd_list
);
1576 instance
->cmd_list
= NULL
;
1583 * Add all the commands to command pool (instance->cmd_pool)
1585 for (i
= 0; i
< max_cmd
; i
++) {
1586 cmd
= instance
->cmd_list
[i
];
1587 memset(cmd
, 0, sizeof(struct megasas_cmd
));
1589 cmd
->instance
= instance
;
1591 list_add_tail(&cmd
->list
, &instance
->cmd_pool
);
1595 * Create a frame pool and assign one frame to each cmd
1597 if (megasas_create_frame_pool(instance
)) {
1598 printk(KERN_DEBUG
"megasas: Error creating frame DMA pool\n");
1599 megasas_free_cmds(instance
);
1606 * megasas_get_controller_info - Returns FW's controller structure
1607 * @instance: Adapter soft state
1608 * @ctrl_info: Controller information structure
1610 * Issues an internal command (DCMD) to get the FW's controller structure.
1611 * This information is mainly used to find out the maximum IO transfer per
1612 * command supported by the FW.
1615 megasas_get_ctrl_info(struct megasas_instance
*instance
,
1616 struct megasas_ctrl_info
*ctrl_info
)
1619 struct megasas_cmd
*cmd
;
1620 struct megasas_dcmd_frame
*dcmd
;
1621 struct megasas_ctrl_info
*ci
;
1622 dma_addr_t ci_h
= 0;
1624 cmd
= megasas_get_cmd(instance
);
1627 printk(KERN_DEBUG
"megasas: Failed to get a free cmd\n");
1631 dcmd
= &cmd
->frame
->dcmd
;
1633 ci
= pci_alloc_consistent(instance
->pdev
,
1634 sizeof(struct megasas_ctrl_info
), &ci_h
);
1637 printk(KERN_DEBUG
"Failed to alloc mem for ctrl info\n");
1638 megasas_return_cmd(instance
, cmd
);
1642 memset(ci
, 0, sizeof(*ci
));
1643 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
1645 dcmd
->cmd
= MFI_CMD_DCMD
;
1646 dcmd
->cmd_status
= 0xFF;
1647 dcmd
->sge_count
= 1;
1648 dcmd
->flags
= MFI_FRAME_DIR_READ
;
1650 dcmd
->data_xfer_len
= sizeof(struct megasas_ctrl_info
);
1651 dcmd
->opcode
= MR_DCMD_CTRL_GET_INFO
;
1652 dcmd
->sgl
.sge32
[0].phys_addr
= ci_h
;
1653 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_ctrl_info
);
1655 if (!megasas_issue_polled(instance
, cmd
)) {
1657 memcpy(ctrl_info
, ci
, sizeof(struct megasas_ctrl_info
));
1662 pci_free_consistent(instance
->pdev
, sizeof(struct megasas_ctrl_info
),
1665 megasas_return_cmd(instance
, cmd
);
1670 * megasas_init_mfi - Initializes the FW
1671 * @instance: Adapter soft state
1673 * This is the main function for initializing MFI firmware.
1675 static int megasas_init_mfi(struct megasas_instance
*instance
)
1681 struct megasas_register_set __iomem
*reg_set
;
1683 struct megasas_cmd
*cmd
;
1684 struct megasas_ctrl_info
*ctrl_info
;
1686 struct megasas_init_frame
*init_frame
;
1687 struct megasas_init_queue_info
*initq_info
;
1688 dma_addr_t init_frame_h
;
1689 dma_addr_t initq_info_h
;
1692 * Map the message registers
1694 instance
->base_addr
= pci_resource_start(instance
->pdev
, 0);
1696 if (pci_request_regions(instance
->pdev
, "megasas: LSI Logic")) {
1697 printk(KERN_DEBUG
"megasas: IO memory region busy!\n");
1701 instance
->reg_set
= ioremap_nocache(instance
->base_addr
, 8192);
1703 if (!instance
->reg_set
) {
1704 printk(KERN_DEBUG
"megasas: Failed to map IO mem\n");
1708 reg_set
= instance
->reg_set
;
1710 switch(instance
->pdev
->device
)
1712 case PCI_DEVICE_ID_LSI_SAS1078R
:
1713 instance
->instancet
= &megasas_instance_template_ppc
;
1715 case PCI_DEVICE_ID_LSI_SAS1064R
:
1716 case PCI_DEVICE_ID_DELL_PERC5
:
1718 instance
->instancet
= &megasas_instance_template_xscale
;
1723 * We expect the FW state to be READY
1725 if (megasas_transition_to_ready(instance
))
1726 goto fail_ready_state
;
1729 * Get various operational parameters from status register
1731 instance
->max_fw_cmds
= instance
->instancet
->read_fw_status_reg(reg_set
) & 0x00FFFF;
1733 * Reduce the max supported cmds by 1. This is to ensure that the
1734 * reply_q_sz (1 more than the max cmd that driver may send)
1735 * does not exceed max cmds that the FW can support
1737 instance
->max_fw_cmds
= instance
->max_fw_cmds
-1;
1738 instance
->max_num_sge
= (instance
->instancet
->read_fw_status_reg(reg_set
) & 0xFF0000) >>
1741 * Create a pool of commands
1743 if (megasas_alloc_cmds(instance
))
1744 goto fail_alloc_cmds
;
1747 * Allocate memory for reply queue. Length of reply queue should
1748 * be _one_ more than the maximum commands handled by the firmware.
1750 * Note: When FW completes commands, it places corresponding contex
1751 * values in this circular reply queue. This circular queue is a fairly
1752 * typical producer-consumer queue. FW is the producer (of completed
1753 * commands) and the driver is the consumer.
1755 context_sz
= sizeof(u32
);
1756 reply_q_sz
= context_sz
* (instance
->max_fw_cmds
+ 1);
1758 instance
->reply_queue
= pci_alloc_consistent(instance
->pdev
,
1760 &instance
->reply_queue_h
);
1762 if (!instance
->reply_queue
) {
1763 printk(KERN_DEBUG
"megasas: Out of DMA mem for reply queue\n");
1764 goto fail_reply_queue
;
1768 * Prepare a init frame. Note the init frame points to queue info
1769 * structure. Each frame has SGL allocated after first 64 bytes. For
1770 * this frame - since we don't need any SGL - we use SGL's space as
1771 * queue info structure
1773 * We will not get a NULL command below. We just created the pool.
1775 cmd
= megasas_get_cmd(instance
);
1777 init_frame
= (struct megasas_init_frame
*)cmd
->frame
;
1778 initq_info
= (struct megasas_init_queue_info
*)
1779 ((unsigned long)init_frame
+ 64);
1781 init_frame_h
= cmd
->frame_phys_addr
;
1782 initq_info_h
= init_frame_h
+ 64;
1784 memset(init_frame
, 0, MEGAMFI_FRAME_SIZE
);
1785 memset(initq_info
, 0, sizeof(struct megasas_init_queue_info
));
1787 initq_info
->reply_queue_entries
= instance
->max_fw_cmds
+ 1;
1788 initq_info
->reply_queue_start_phys_addr_lo
= instance
->reply_queue_h
;
1790 initq_info
->producer_index_phys_addr_lo
= instance
->producer_h
;
1791 initq_info
->consumer_index_phys_addr_lo
= instance
->consumer_h
;
1793 init_frame
->cmd
= MFI_CMD_INIT
;
1794 init_frame
->cmd_status
= 0xFF;
1795 init_frame
->queue_info_new_phys_addr_lo
= initq_info_h
;
1797 init_frame
->data_xfer_len
= sizeof(struct megasas_init_queue_info
);
1800 * disable the intr before firing the init frame to FW
1802 megasas_disable_intr(instance
);
1805 * Issue the init frame in polled mode
1807 if (megasas_issue_polled(instance
, cmd
)) {
1808 printk(KERN_DEBUG
"megasas: Failed to init firmware\n");
1812 megasas_return_cmd(instance
, cmd
);
1814 ctrl_info
= kmalloc(sizeof(struct megasas_ctrl_info
), GFP_KERNEL
);
1817 * Compute the max allowed sectors per IO: The controller info has two
1818 * limits on max sectors. Driver should use the minimum of these two.
1820 * 1 << stripe_sz_ops.min = max sectors per strip
1822 * Note that older firmwares ( < FW ver 30) didn't report information
1823 * to calculate max_sectors_1. So the number ended up as zero always.
1825 if (ctrl_info
&& !megasas_get_ctrl_info(instance
, ctrl_info
)) {
1827 max_sectors_1
= (1 << ctrl_info
->stripe_sz_ops
.min
) *
1828 ctrl_info
->max_strips_per_io
;
1829 max_sectors_2
= ctrl_info
->max_request_size
;
1831 instance
->max_sectors_per_req
= (max_sectors_1
< max_sectors_2
)
1832 ? max_sectors_1
: max_sectors_2
;
1834 instance
->max_sectors_per_req
= instance
->max_num_sge
*
1842 megasas_return_cmd(instance
, cmd
);
1844 pci_free_consistent(instance
->pdev
, reply_q_sz
,
1845 instance
->reply_queue
, instance
->reply_queue_h
);
1847 megasas_free_cmds(instance
);
1851 iounmap(instance
->reg_set
);
1854 pci_release_regions(instance
->pdev
);
1860 * megasas_release_mfi - Reverses the FW initialization
1861 * @intance: Adapter soft state
1863 static void megasas_release_mfi(struct megasas_instance
*instance
)
1865 u32 reply_q_sz
= sizeof(u32
) * (instance
->max_fw_cmds
+ 1);
1867 pci_free_consistent(instance
->pdev
, reply_q_sz
,
1868 instance
->reply_queue
, instance
->reply_queue_h
);
1870 megasas_free_cmds(instance
);
1872 iounmap(instance
->reg_set
);
1874 pci_release_regions(instance
->pdev
);
1878 * megasas_get_seq_num - Gets latest event sequence numbers
1879 * @instance: Adapter soft state
1880 * @eli: FW event log sequence numbers information
1882 * FW maintains a log of all events in a non-volatile area. Upper layers would
1883 * usually find out the latest sequence number of the events, the seq number at
1884 * the boot etc. They would "read" all the events below the latest seq number
1885 * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
1886 * number), they would subsribe to AEN (asynchronous event notification) and
1887 * wait for the events to happen.
1890 megasas_get_seq_num(struct megasas_instance
*instance
,
1891 struct megasas_evt_log_info
*eli
)
1893 struct megasas_cmd
*cmd
;
1894 struct megasas_dcmd_frame
*dcmd
;
1895 struct megasas_evt_log_info
*el_info
;
1896 dma_addr_t el_info_h
= 0;
1898 cmd
= megasas_get_cmd(instance
);
1904 dcmd
= &cmd
->frame
->dcmd
;
1905 el_info
= pci_alloc_consistent(instance
->pdev
,
1906 sizeof(struct megasas_evt_log_info
),
1910 megasas_return_cmd(instance
, cmd
);
1914 memset(el_info
, 0, sizeof(*el_info
));
1915 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
1917 dcmd
->cmd
= MFI_CMD_DCMD
;
1918 dcmd
->cmd_status
= 0x0;
1919 dcmd
->sge_count
= 1;
1920 dcmd
->flags
= MFI_FRAME_DIR_READ
;
1922 dcmd
->data_xfer_len
= sizeof(struct megasas_evt_log_info
);
1923 dcmd
->opcode
= MR_DCMD_CTRL_EVENT_GET_INFO
;
1924 dcmd
->sgl
.sge32
[0].phys_addr
= el_info_h
;
1925 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_evt_log_info
);
1927 megasas_issue_blocked_cmd(instance
, cmd
);
1930 * Copy the data back into callers buffer
1932 memcpy(eli
, el_info
, sizeof(struct megasas_evt_log_info
));
1934 pci_free_consistent(instance
->pdev
, sizeof(struct megasas_evt_log_info
),
1935 el_info
, el_info_h
);
1937 megasas_return_cmd(instance
, cmd
);
1943 * megasas_register_aen - Registers for asynchronous event notification
1944 * @instance: Adapter soft state
1945 * @seq_num: The starting sequence number
1946 * @class_locale: Class of the event
1948 * This function subscribes for AEN for events beyond the @seq_num. It requests
1949 * to be notified if and only if the event is of type @class_locale
1952 megasas_register_aen(struct megasas_instance
*instance
, u32 seq_num
,
1953 u32 class_locale_word
)
1956 struct megasas_cmd
*cmd
;
1957 struct megasas_dcmd_frame
*dcmd
;
1958 union megasas_evt_class_locale curr_aen
;
1959 union megasas_evt_class_locale prev_aen
;
1962 * If there an AEN pending already (aen_cmd), check if the
1963 * class_locale of that pending AEN is inclusive of the new
1964 * AEN request we currently have. If it is, then we don't have
1965 * to do anything. In other words, whichever events the current
1966 * AEN request is subscribing to, have already been subscribed
1969 * If the old_cmd is _not_ inclusive, then we have to abort
1970 * that command, form a class_locale that is superset of both
1971 * old and current and re-issue to the FW
1974 curr_aen
.word
= class_locale_word
;
1976 if (instance
->aen_cmd
) {
1978 prev_aen
.word
= instance
->aen_cmd
->frame
->dcmd
.mbox
.w
[1];
1981 * A class whose enum value is smaller is inclusive of all
1982 * higher values. If a PROGRESS (= -1) was previously
1983 * registered, then a new registration requests for higher
1984 * classes need not be sent to FW. They are automatically
1987 * Locale numbers don't have such hierarchy. They are bitmap
1990 if ((prev_aen
.members
.class <= curr_aen
.members
.class) &&
1991 !((prev_aen
.members
.locale
& curr_aen
.members
.locale
) ^
1992 curr_aen
.members
.locale
)) {
1994 * Previously issued event registration includes
1995 * current request. Nothing to do.
1999 curr_aen
.members
.locale
|= prev_aen
.members
.locale
;
2001 if (prev_aen
.members
.class < curr_aen
.members
.class)
2002 curr_aen
.members
.class = prev_aen
.members
.class;
2004 instance
->aen_cmd
->abort_aen
= 1;
2005 ret_val
= megasas_issue_blocked_abort_cmd(instance
,
2010 printk(KERN_DEBUG
"megasas: Failed to abort "
2011 "previous AEN command\n");
2017 cmd
= megasas_get_cmd(instance
);
2022 dcmd
= &cmd
->frame
->dcmd
;
2024 memset(instance
->evt_detail
, 0, sizeof(struct megasas_evt_detail
));
2027 * Prepare DCMD for aen registration
2029 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2031 dcmd
->cmd
= MFI_CMD_DCMD
;
2032 dcmd
->cmd_status
= 0x0;
2033 dcmd
->sge_count
= 1;
2034 dcmd
->flags
= MFI_FRAME_DIR_READ
;
2036 dcmd
->data_xfer_len
= sizeof(struct megasas_evt_detail
);
2037 dcmd
->opcode
= MR_DCMD_CTRL_EVENT_WAIT
;
2038 dcmd
->mbox
.w
[0] = seq_num
;
2039 dcmd
->mbox
.w
[1] = curr_aen
.word
;
2040 dcmd
->sgl
.sge32
[0].phys_addr
= (u32
) instance
->evt_detail_h
;
2041 dcmd
->sgl
.sge32
[0].length
= sizeof(struct megasas_evt_detail
);
2044 * Store reference to the cmd used to register for AEN. When an
2045 * application wants us to register for AEN, we have to abort this
2046 * cmd and re-register with a new EVENT LOCALE supplied by that app
2048 instance
->aen_cmd
= cmd
;
2051 * Issue the aen registration frame
2053 instance
->instancet
->fire_cmd(cmd
->frame_phys_addr
,0,instance
->reg_set
);
2059 * megasas_start_aen - Subscribes to AEN during driver load time
2060 * @instance: Adapter soft state
2062 static int megasas_start_aen(struct megasas_instance
*instance
)
2064 struct megasas_evt_log_info eli
;
2065 union megasas_evt_class_locale class_locale
;
2068 * Get the latest sequence number from FW
2070 memset(&eli
, 0, sizeof(eli
));
2072 if (megasas_get_seq_num(instance
, &eli
))
2076 * Register AEN with FW for latest sequence number plus 1
2078 class_locale
.members
.reserved
= 0;
2079 class_locale
.members
.locale
= MR_EVT_LOCALE_ALL
;
2080 class_locale
.members
.class = MR_EVT_CLASS_DEBUG
;
2082 return megasas_register_aen(instance
, eli
.newest_seq_num
+ 1,
2087 * megasas_io_attach - Attaches this driver to SCSI mid-layer
2088 * @instance: Adapter soft state
2090 static int megasas_io_attach(struct megasas_instance
*instance
)
2092 struct Scsi_Host
*host
= instance
->host
;
2095 * Export parameters required by SCSI mid-layer
2097 host
->irq
= instance
->pdev
->irq
;
2098 host
->unique_id
= instance
->unique_id
;
2099 host
->can_queue
= instance
->max_fw_cmds
- MEGASAS_INT_CMDS
;
2100 host
->this_id
= instance
->init_id
;
2101 host
->sg_tablesize
= instance
->max_num_sge
;
2102 host
->max_sectors
= instance
->max_sectors_per_req
;
2103 host
->cmd_per_lun
= 128;
2104 host
->max_channel
= MEGASAS_MAX_CHANNELS
- 1;
2105 host
->max_id
= MEGASAS_MAX_DEV_PER_CHANNEL
;
2106 host
->max_lun
= MEGASAS_MAX_LUN
;
2107 host
->max_cmd_len
= 16;
2110 * Notify the mid-layer about the new controller
2112 if (scsi_add_host(host
, &instance
->pdev
->dev
)) {
2113 printk(KERN_DEBUG
"megasas: scsi_add_host failed\n");
2118 * Trigger SCSI to scan our drives
2120 scsi_scan_host(host
);
2125 * megasas_probe_one - PCI hotplug entry point
2126 * @pdev: PCI device structure
2127 * @id: PCI ids of supported hotplugged adapter
2129 static int __devinit
2130 megasas_probe_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
2133 struct Scsi_Host
*host
;
2134 struct megasas_instance
*instance
;
2137 * Announce PCI information
2139 printk(KERN_INFO
"megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
2140 pdev
->vendor
, pdev
->device
, pdev
->subsystem_vendor
,
2141 pdev
->subsystem_device
);
2143 printk("bus %d:slot %d:func %d\n",
2144 pdev
->bus
->number
, PCI_SLOT(pdev
->devfn
), PCI_FUNC(pdev
->devfn
));
2147 * PCI prepping: enable device set bus mastering and dma mask
2149 rval
= pci_enable_device(pdev
);
2155 pci_set_master(pdev
);
2158 * All our contollers are capable of performing 64-bit DMA
2161 if (pci_set_dma_mask(pdev
, DMA_64BIT_MASK
) != 0) {
2163 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
) != 0)
2164 goto fail_set_dma_mask
;
2167 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
) != 0)
2168 goto fail_set_dma_mask
;
2171 host
= scsi_host_alloc(&megasas_template
,
2172 sizeof(struct megasas_instance
));
2175 printk(KERN_DEBUG
"megasas: scsi_host_alloc failed\n");
2176 goto fail_alloc_instance
;
2179 instance
= (struct megasas_instance
*)host
->hostdata
;
2180 memset(instance
, 0, sizeof(*instance
));
2182 instance
->producer
= pci_alloc_consistent(pdev
, sizeof(u32
),
2183 &instance
->producer_h
);
2184 instance
->consumer
= pci_alloc_consistent(pdev
, sizeof(u32
),
2185 &instance
->consumer_h
);
2187 if (!instance
->producer
|| !instance
->consumer
) {
2188 printk(KERN_DEBUG
"megasas: Failed to allocate memory for "
2189 "producer, consumer\n");
2190 goto fail_alloc_dma_buf
;
2193 *instance
->producer
= 0;
2194 *instance
->consumer
= 0;
2196 instance
->evt_detail
= pci_alloc_consistent(pdev
,
2198 megasas_evt_detail
),
2199 &instance
->evt_detail_h
);
2201 if (!instance
->evt_detail
) {
2202 printk(KERN_DEBUG
"megasas: Failed to allocate memory for "
2203 "event detail structure\n");
2204 goto fail_alloc_dma_buf
;
2208 * Initialize locks and queues
2210 INIT_LIST_HEAD(&instance
->cmd_pool
);
2212 atomic_set(&instance
->fw_outstanding
,0);
2214 init_waitqueue_head(&instance
->int_cmd_wait_q
);
2215 init_waitqueue_head(&instance
->abort_cmd_wait_q
);
2217 spin_lock_init(&instance
->cmd_pool_lock
);
2219 sema_init(&instance
->aen_mutex
, 1);
2220 sema_init(&instance
->ioctl_sem
, MEGASAS_INT_CMDS
);
2223 * Initialize PCI related and misc parameters
2225 instance
->pdev
= pdev
;
2226 instance
->host
= host
;
2227 instance
->unique_id
= pdev
->bus
->number
<< 8 | pdev
->devfn
;
2228 instance
->init_id
= MEGASAS_DEFAULT_INIT_ID
;
2231 * Initialize MFI Firmware
2233 if (megasas_init_mfi(instance
))
2239 if (request_irq(pdev
->irq
, megasas_isr
, IRQF_SHARED
, "megasas", instance
)) {
2240 printk(KERN_DEBUG
"megasas: Failed to register IRQ\n");
2244 instance
->instancet
->enable_intr(instance
->reg_set
);
2247 * Store instance in PCI softstate
2249 pci_set_drvdata(pdev
, instance
);
2252 * Add this controller to megasas_mgmt_info structure so that it
2253 * can be exported to management applications
2255 megasas_mgmt_info
.count
++;
2256 megasas_mgmt_info
.instance
[megasas_mgmt_info
.max_index
] = instance
;
2257 megasas_mgmt_info
.max_index
++;
2260 * Initiate AEN (Asynchronous Event Notification)
2262 if (megasas_start_aen(instance
)) {
2263 printk(KERN_DEBUG
"megasas: start aen failed\n");
2264 goto fail_start_aen
;
2268 * Register with SCSI mid-layer
2270 if (megasas_io_attach(instance
))
2271 goto fail_io_attach
;
2277 megasas_mgmt_info
.count
--;
2278 megasas_mgmt_info
.instance
[megasas_mgmt_info
.max_index
] = NULL
;
2279 megasas_mgmt_info
.max_index
--;
2281 pci_set_drvdata(pdev
, NULL
);
2282 megasas_disable_intr(instance
);
2283 free_irq(instance
->pdev
->irq
, instance
);
2285 megasas_release_mfi(instance
);
2290 if (instance
->evt_detail
)
2291 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2292 instance
->evt_detail
,
2293 instance
->evt_detail_h
);
2295 if (instance
->producer
)
2296 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2297 instance
->producer_h
);
2298 if (instance
->consumer
)
2299 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2300 instance
->consumer_h
);
2301 scsi_host_put(host
);
2303 fail_alloc_instance
:
2305 pci_disable_device(pdev
);
2311 * megasas_flush_cache - Requests FW to flush all its caches
2312 * @instance: Adapter soft state
2314 static void megasas_flush_cache(struct megasas_instance
*instance
)
2316 struct megasas_cmd
*cmd
;
2317 struct megasas_dcmd_frame
*dcmd
;
2319 cmd
= megasas_get_cmd(instance
);
2324 dcmd
= &cmd
->frame
->dcmd
;
2326 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2328 dcmd
->cmd
= MFI_CMD_DCMD
;
2329 dcmd
->cmd_status
= 0x0;
2330 dcmd
->sge_count
= 0;
2331 dcmd
->flags
= MFI_FRAME_DIR_NONE
;
2333 dcmd
->data_xfer_len
= 0;
2334 dcmd
->opcode
= MR_DCMD_CTRL_CACHE_FLUSH
;
2335 dcmd
->mbox
.b
[0] = MR_FLUSH_CTRL_CACHE
| MR_FLUSH_DISK_CACHE
;
2337 megasas_issue_blocked_cmd(instance
, cmd
);
2339 megasas_return_cmd(instance
, cmd
);
2345 * megasas_shutdown_controller - Instructs FW to shutdown the controller
2346 * @instance: Adapter soft state
2348 static void megasas_shutdown_controller(struct megasas_instance
*instance
)
2350 struct megasas_cmd
*cmd
;
2351 struct megasas_dcmd_frame
*dcmd
;
2353 cmd
= megasas_get_cmd(instance
);
2358 if (instance
->aen_cmd
)
2359 megasas_issue_blocked_abort_cmd(instance
, instance
->aen_cmd
);
2361 dcmd
= &cmd
->frame
->dcmd
;
2363 memset(dcmd
->mbox
.b
, 0, MFI_MBOX_SIZE
);
2365 dcmd
->cmd
= MFI_CMD_DCMD
;
2366 dcmd
->cmd_status
= 0x0;
2367 dcmd
->sge_count
= 0;
2368 dcmd
->flags
= MFI_FRAME_DIR_NONE
;
2370 dcmd
->data_xfer_len
= 0;
2371 dcmd
->opcode
= MR_DCMD_CTRL_SHUTDOWN
;
2373 megasas_issue_blocked_cmd(instance
, cmd
);
2375 megasas_return_cmd(instance
, cmd
);
2381 * megasas_detach_one - PCI hot"un"plug entry point
2382 * @pdev: PCI device structure
2384 static void megasas_detach_one(struct pci_dev
*pdev
)
2387 struct Scsi_Host
*host
;
2388 struct megasas_instance
*instance
;
2390 instance
= pci_get_drvdata(pdev
);
2391 host
= instance
->host
;
2393 scsi_remove_host(instance
->host
);
2394 megasas_flush_cache(instance
);
2395 megasas_shutdown_controller(instance
);
2398 * Take the instance off the instance array. Note that we will not
2399 * decrement the max_index. We let this array be sparse array
2401 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
2402 if (megasas_mgmt_info
.instance
[i
] == instance
) {
2403 megasas_mgmt_info
.count
--;
2404 megasas_mgmt_info
.instance
[i
] = NULL
;
2410 pci_set_drvdata(instance
->pdev
, NULL
);
2412 megasas_disable_intr(instance
);
2414 free_irq(instance
->pdev
->irq
, instance
);
2416 megasas_release_mfi(instance
);
2418 pci_free_consistent(pdev
, sizeof(struct megasas_evt_detail
),
2419 instance
->evt_detail
, instance
->evt_detail_h
);
2421 pci_free_consistent(pdev
, sizeof(u32
), instance
->producer
,
2422 instance
->producer_h
);
2424 pci_free_consistent(pdev
, sizeof(u32
), instance
->consumer
,
2425 instance
->consumer_h
);
2427 scsi_host_put(host
);
2429 pci_set_drvdata(pdev
, NULL
);
2431 pci_disable_device(pdev
);
2437 * megasas_shutdown - Shutdown entry point
2438 * @device: Generic device structure
2440 static void megasas_shutdown(struct pci_dev
*pdev
)
2442 struct megasas_instance
*instance
= pci_get_drvdata(pdev
);
2443 megasas_flush_cache(instance
);
2447 * megasas_mgmt_open - char node "open" entry point
2449 static int megasas_mgmt_open(struct inode
*inode
, struct file
*filep
)
2452 * Allow only those users with admin rights
2454 if (!capable(CAP_SYS_ADMIN
))
2461 * megasas_mgmt_release - char node "release" entry point
2463 static int megasas_mgmt_release(struct inode
*inode
, struct file
*filep
)
2465 filep
->private_data
= NULL
;
2466 fasync_helper(-1, filep
, 0, &megasas_async_queue
);
2472 * megasas_mgmt_fasync - Async notifier registration from applications
2474 * This function adds the calling process to a driver global queue. When an
2475 * event occurs, SIGIO will be sent to all processes in this queue.
2477 static int megasas_mgmt_fasync(int fd
, struct file
*filep
, int mode
)
2481 mutex_lock(&megasas_async_queue_mutex
);
2483 rc
= fasync_helper(fd
, filep
, mode
, &megasas_async_queue
);
2485 mutex_unlock(&megasas_async_queue_mutex
);
2488 /* For sanity check when we get ioctl */
2489 filep
->private_data
= filep
;
2493 printk(KERN_DEBUG
"megasas: fasync_helper failed [%d]\n", rc
);
2499 * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
2500 * @instance: Adapter soft state
2501 * @argp: User's ioctl packet
2504 megasas_mgmt_fw_ioctl(struct megasas_instance
*instance
,
2505 struct megasas_iocpacket __user
* user_ioc
,
2506 struct megasas_iocpacket
*ioc
)
2508 struct megasas_sge32
*kern_sge32
;
2509 struct megasas_cmd
*cmd
;
2510 void *kbuff_arr
[MAX_IOCTL_SGE
];
2511 dma_addr_t buf_handle
= 0;
2514 dma_addr_t sense_handle
;
2517 memset(kbuff_arr
, 0, sizeof(kbuff_arr
));
2519 if (ioc
->sge_count
> MAX_IOCTL_SGE
) {
2520 printk(KERN_DEBUG
"megasas: SGE count [%d] > max limit [%d]\n",
2521 ioc
->sge_count
, MAX_IOCTL_SGE
);
2525 cmd
= megasas_get_cmd(instance
);
2527 printk(KERN_DEBUG
"megasas: Failed to get a cmd packet\n");
2532 * User's IOCTL packet has 2 frames (maximum). Copy those two
2533 * frames into our cmd's frames. cmd->frame's context will get
2534 * overwritten when we copy from user's frames. So set that value
2537 memcpy(cmd
->frame
, ioc
->frame
.raw
, 2 * MEGAMFI_FRAME_SIZE
);
2538 cmd
->frame
->hdr
.context
= cmd
->index
;
2541 * The management interface between applications and the fw uses
2542 * MFI frames. E.g, RAID configuration changes, LD property changes
2543 * etc are accomplishes through different kinds of MFI frames. The
2544 * driver needs to care only about substituting user buffers with
2545 * kernel buffers in SGLs. The location of SGL is embedded in the
2546 * struct iocpacket itself.
2548 kern_sge32
= (struct megasas_sge32
*)
2549 ((unsigned long)cmd
->frame
+ ioc
->sgl_off
);
2552 * For each user buffer, create a mirror buffer and copy in
2554 for (i
= 0; i
< ioc
->sge_count
; i
++) {
2555 kbuff_arr
[i
] = pci_alloc_consistent(instance
->pdev
,
2556 ioc
->sgl
[i
].iov_len
,
2558 if (!kbuff_arr
[i
]) {
2559 printk(KERN_DEBUG
"megasas: Failed to alloc "
2560 "kernel SGL buffer for IOCTL \n");
2566 * We don't change the dma_coherent_mask, so
2567 * pci_alloc_consistent only returns 32bit addresses
2569 kern_sge32
[i
].phys_addr
= (u32
) buf_handle
;
2570 kern_sge32
[i
].length
= ioc
->sgl
[i
].iov_len
;
2573 * We created a kernel buffer corresponding to the
2574 * user buffer. Now copy in from the user buffer
2576 if (copy_from_user(kbuff_arr
[i
], ioc
->sgl
[i
].iov_base
,
2577 (u32
) (ioc
->sgl
[i
].iov_len
))) {
2583 if (ioc
->sense_len
) {
2584 sense
= pci_alloc_consistent(instance
->pdev
, ioc
->sense_len
,
2592 (u32
*) ((unsigned long)cmd
->frame
+ ioc
->sense_off
);
2593 *sense_ptr
= sense_handle
;
2597 * Set the sync_cmd flag so that the ISR knows not to complete this
2598 * cmd to the SCSI mid-layer
2601 megasas_issue_blocked_cmd(instance
, cmd
);
2605 * copy out the kernel buffers to user buffers
2607 for (i
= 0; i
< ioc
->sge_count
; i
++) {
2608 if (copy_to_user(ioc
->sgl
[i
].iov_base
, kbuff_arr
[i
],
2609 ioc
->sgl
[i
].iov_len
)) {
2616 * copy out the sense
2618 if (ioc
->sense_len
) {
2620 * sense_ptr points to the location that has the user
2621 * sense buffer address
2623 sense_ptr
= (u32
*) ((unsigned long)ioc
->frame
.raw
+
2626 if (copy_to_user((void __user
*)((unsigned long)(*sense_ptr
)),
2627 sense
, ioc
->sense_len
)) {
2634 * copy the status codes returned by the fw
2636 if (copy_to_user(&user_ioc
->frame
.hdr
.cmd_status
,
2637 &cmd
->frame
->hdr
.cmd_status
, sizeof(u8
))) {
2638 printk(KERN_DEBUG
"megasas: Error copying out cmd_status\n");
2644 pci_free_consistent(instance
->pdev
, ioc
->sense_len
,
2645 sense
, sense_handle
);
2648 for (i
= 0; i
< ioc
->sge_count
&& kbuff_arr
[i
]; i
++) {
2649 pci_free_consistent(instance
->pdev
,
2650 kern_sge32
[i
].length
,
2651 kbuff_arr
[i
], kern_sge32
[i
].phys_addr
);
2654 megasas_return_cmd(instance
, cmd
);
2658 static struct megasas_instance
*megasas_lookup_instance(u16 host_no
)
2662 for (i
= 0; i
< megasas_mgmt_info
.max_index
; i
++) {
2664 if ((megasas_mgmt_info
.instance
[i
]) &&
2665 (megasas_mgmt_info
.instance
[i
]->host
->host_no
== host_no
))
2666 return megasas_mgmt_info
.instance
[i
];
2672 static int megasas_mgmt_ioctl_fw(struct file
*file
, unsigned long arg
)
2674 struct megasas_iocpacket __user
*user_ioc
=
2675 (struct megasas_iocpacket __user
*)arg
;
2676 struct megasas_iocpacket
*ioc
;
2677 struct megasas_instance
*instance
;
2680 ioc
= kmalloc(sizeof(*ioc
), GFP_KERNEL
);
2684 if (copy_from_user(ioc
, user_ioc
, sizeof(*ioc
))) {
2689 instance
= megasas_lookup_instance(ioc
->host_no
);
2696 * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
2698 if (down_interruptible(&instance
->ioctl_sem
)) {
2699 error
= -ERESTARTSYS
;
2702 error
= megasas_mgmt_fw_ioctl(instance
, user_ioc
, ioc
);
2703 up(&instance
->ioctl_sem
);
2710 static int megasas_mgmt_ioctl_aen(struct file
*file
, unsigned long arg
)
2712 struct megasas_instance
*instance
;
2713 struct megasas_aen aen
;
2716 if (file
->private_data
!= file
) {
2717 printk(KERN_DEBUG
"megasas: fasync_helper was not "
2722 if (copy_from_user(&aen
, (void __user
*)arg
, sizeof(aen
)))
2725 instance
= megasas_lookup_instance(aen
.host_no
);
2730 down(&instance
->aen_mutex
);
2731 error
= megasas_register_aen(instance
, aen
.seq_num
,
2732 aen
.class_locale_word
);
2733 up(&instance
->aen_mutex
);
2738 * megasas_mgmt_ioctl - char node ioctl entry point
2741 megasas_mgmt_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
2744 case MEGASAS_IOC_FIRMWARE
:
2745 return megasas_mgmt_ioctl_fw(file
, arg
);
2747 case MEGASAS_IOC_GET_AEN
:
2748 return megasas_mgmt_ioctl_aen(file
, arg
);
2754 #ifdef CONFIG_COMPAT
2755 static int megasas_mgmt_compat_ioctl_fw(struct file
*file
, unsigned long arg
)
2757 struct compat_megasas_iocpacket __user
*cioc
=
2758 (struct compat_megasas_iocpacket __user
*)arg
;
2759 struct megasas_iocpacket __user
*ioc
=
2760 compat_alloc_user_space(sizeof(struct megasas_iocpacket
));
2764 clear_user(ioc
, sizeof(*ioc
));
2766 if (copy_in_user(&ioc
->host_no
, &cioc
->host_no
, sizeof(u16
)) ||
2767 copy_in_user(&ioc
->sgl_off
, &cioc
->sgl_off
, sizeof(u32
)) ||
2768 copy_in_user(&ioc
->sense_off
, &cioc
->sense_off
, sizeof(u32
)) ||
2769 copy_in_user(&ioc
->sense_len
, &cioc
->sense_len
, sizeof(u32
)) ||
2770 copy_in_user(ioc
->frame
.raw
, cioc
->frame
.raw
, 128) ||
2771 copy_in_user(&ioc
->sge_count
, &cioc
->sge_count
, sizeof(u32
)))
2774 for (i
= 0; i
< MAX_IOCTL_SGE
; i
++) {
2777 if (get_user(ptr
, &cioc
->sgl
[i
].iov_base
) ||
2778 put_user(compat_ptr(ptr
), &ioc
->sgl
[i
].iov_base
) ||
2779 copy_in_user(&ioc
->sgl
[i
].iov_len
,
2780 &cioc
->sgl
[i
].iov_len
, sizeof(compat_size_t
)))
2784 error
= megasas_mgmt_ioctl_fw(file
, (unsigned long)ioc
);
2786 if (copy_in_user(&cioc
->frame
.hdr
.cmd_status
,
2787 &ioc
->frame
.hdr
.cmd_status
, sizeof(u8
))) {
2788 printk(KERN_DEBUG
"megasas: error copy_in_user cmd_status\n");
2795 megasas_mgmt_compat_ioctl(struct file
*file
, unsigned int cmd
,
2799 case MEGASAS_IOC_FIRMWARE32
:
2800 return megasas_mgmt_compat_ioctl_fw(file
, arg
);
2801 case MEGASAS_IOC_GET_AEN
:
2802 return megasas_mgmt_ioctl_aen(file
, arg
);
2810 * File operations structure for management interface
2812 static struct file_operations megasas_mgmt_fops
= {
2813 .owner
= THIS_MODULE
,
2814 .open
= megasas_mgmt_open
,
2815 .release
= megasas_mgmt_release
,
2816 .fasync
= megasas_mgmt_fasync
,
2817 .unlocked_ioctl
= megasas_mgmt_ioctl
,
2818 #ifdef CONFIG_COMPAT
2819 .compat_ioctl
= megasas_mgmt_compat_ioctl
,
2824 * PCI hotplug support registration structure
2826 static struct pci_driver megasas_pci_driver
= {
2828 .name
= "megaraid_sas",
2829 .id_table
= megasas_pci_table
,
2830 .probe
= megasas_probe_one
,
2831 .remove
= __devexit_p(megasas_detach_one
),
2832 .shutdown
= megasas_shutdown
,
2836 * Sysfs driver attributes
2838 static ssize_t
megasas_sysfs_show_version(struct device_driver
*dd
, char *buf
)
2840 return snprintf(buf
, strlen(MEGASAS_VERSION
) + 2, "%s\n",
2844 static DRIVER_ATTR(version
, S_IRUGO
, megasas_sysfs_show_version
, NULL
);
2847 megasas_sysfs_show_release_date(struct device_driver
*dd
, char *buf
)
2849 return snprintf(buf
, strlen(MEGASAS_RELDATE
) + 2, "%s\n",
2853 static DRIVER_ATTR(release_date
, S_IRUGO
, megasas_sysfs_show_release_date
,
2857 * megasas_init - Driver load entry point
2859 static int __init
megasas_init(void)
2864 * Announce driver version and other information
2866 printk(KERN_INFO
"megasas: %s %s\n", MEGASAS_VERSION
,
2867 MEGASAS_EXT_VERSION
);
2869 memset(&megasas_mgmt_info
, 0, sizeof(megasas_mgmt_info
));
2872 * Register character device node
2874 rval
= register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops
);
2877 printk(KERN_DEBUG
"megasas: failed to open device node\n");
2881 megasas_mgmt_majorno
= rval
;
2884 * Register ourselves as PCI hotplug module
2886 rval
= pci_register_driver(&megasas_pci_driver
);
2889 printk(KERN_DEBUG
"megasas: PCI hotplug regisration failed \n");
2890 unregister_chrdev(megasas_mgmt_majorno
, "megaraid_sas_ioctl");
2893 driver_create_file(&megasas_pci_driver
.driver
, &driver_attr_version
);
2894 driver_create_file(&megasas_pci_driver
.driver
,
2895 &driver_attr_release_date
);
2901 * megasas_exit - Driver unload entry point
2903 static void __exit
megasas_exit(void)
2905 driver_remove_file(&megasas_pci_driver
.driver
, &driver_attr_version
);
2906 driver_remove_file(&megasas_pci_driver
.driver
,
2907 &driver_attr_release_date
);
2909 pci_unregister_driver(&megasas_pci_driver
);
2910 unregister_chrdev(megasas_mgmt_majorno
, "megaraid_sas_ioctl");
2913 module_init(megasas_init
);
2914 module_exit(megasas_exit
);