2 * Driver for the Micron P320 SSD
3 * Copyright (C) 2011 Micron Technology, Inc.
5 * Portions of this code were derived from works subjected to the
7 * Copyright (C) 2009 Integrated Device Technology, Inc.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
21 #include <linux/pci.h>
22 #include <linux/interrupt.h>
23 #include <linux/ata.h>
24 #include <linux/delay.h>
25 #include <linux/hdreg.h>
26 #include <linux/uaccess.h>
27 #include <linux/random.h>
28 #include <linux/smp.h>
29 #include <linux/compat.h>
31 #include <linux/module.h>
32 #include <linux/genhd.h>
33 #include <linux/blkdev.h>
34 #include <linux/blk-mq.h>
35 #include <linux/bio.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/idr.h>
38 #include <linux/kthread.h>
39 #include <../drivers/ata/ahci.h>
40 #include <linux/export.h>
41 #include <linux/debugfs.h>
42 #include <linux/prefetch.h>
45 #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
47 /* DMA region containing RX Fis, Identify, RLE10, and SMART buffers */
48 #define AHCI_RX_FIS_SZ 0x100
49 #define AHCI_RX_FIS_OFFSET 0x0
50 #define AHCI_IDFY_SZ ATA_SECT_SIZE
51 #define AHCI_IDFY_OFFSET 0x400
52 #define AHCI_SECTBUF_SZ ATA_SECT_SIZE
53 #define AHCI_SECTBUF_OFFSET 0x800
54 #define AHCI_SMARTBUF_SZ ATA_SECT_SIZE
55 #define AHCI_SMARTBUF_OFFSET 0xC00
56 /* 0x100 + 0x200 + 0x200 + 0x200 is smaller than 4k but we pad it out */
57 #define BLOCK_DMA_ALLOC_SZ 4096
59 /* DMA region containing command table (should be 8192 bytes) */
60 #define AHCI_CMD_SLOT_SZ sizeof(struct mtip_cmd_hdr)
61 #define AHCI_CMD_TBL_SZ (MTIP_MAX_COMMAND_SLOTS * AHCI_CMD_SLOT_SZ)
62 #define AHCI_CMD_TBL_OFFSET 0x0
64 /* DMA region per command (contains header and SGL) */
65 #define AHCI_CMD_TBL_HDR_SZ 0x80
66 #define AHCI_CMD_TBL_HDR_OFFSET 0x0
67 #define AHCI_CMD_TBL_SGL_SZ (MTIP_MAX_SG * sizeof(struct mtip_cmd_sg))
68 #define AHCI_CMD_TBL_SGL_OFFSET AHCI_CMD_TBL_HDR_SZ
69 #define CMD_DMA_ALLOC_SZ (AHCI_CMD_TBL_SGL_SZ + AHCI_CMD_TBL_HDR_SZ)
72 #define HOST_CAP_NZDMA (1 << 19)
73 #define HOST_HSORG 0xFC
74 #define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
75 #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
76 #define HSORG_HWREV 0xFF00
77 #define HSORG_STYLE 0x8
78 #define HSORG_SLOTGROUPS 0x7
80 #define PORT_COMMAND_ISSUE 0x38
81 #define PORT_SDBV 0x7C
83 #define PORT_OFFSET 0x100
84 #define PORT_MEM_SIZE 0x80
86 #define PORT_IRQ_ERR \
87 (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
88 PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
89 PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
91 #define PORT_IRQ_LEGACY \
92 (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
93 #define PORT_IRQ_HANDLED \
94 (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
95 PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
96 PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
97 #define DEF_PORT_IRQ \
98 (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
100 /* product numbers */
101 #define MTIP_PRODUCT_UNKNOWN 0x00
102 #define MTIP_PRODUCT_ASICFPGA 0x11
104 /* Device instance number, incremented each time a device is probed. */
107 static struct list_head online_list
;
108 static struct list_head removing_list
;
109 static spinlock_t dev_lock
;
112 * Global variable used to hold the major block device number
113 * allocated in mtip_init().
115 static int mtip_major
;
116 static struct dentry
*dfs_parent
;
117 static struct dentry
*dfs_device_status
;
119 static u32 cpu_use
[NR_CPUS
];
121 static DEFINE_SPINLOCK(rssd_index_lock
);
122 static DEFINE_IDA(rssd_index_ida
);
124 static int mtip_block_initialize(struct driver_data
*dd
);
127 struct mtip_compat_ide_task_request_s
{
130 ide_reg_valid_t out_flags
;
131 ide_reg_valid_t in_flags
;
134 compat_ulong_t out_size
;
135 compat_ulong_t in_size
;
140 * This function check_for_surprise_removal is called
141 * while card is removed from the system and it will
142 * read the vendor id from the configration space
144 * @pdev Pointer to the pci_dev structure.
147 * true if device removed, else false
149 static bool mtip_check_surprise_removal(struct pci_dev
*pdev
)
152 struct driver_data
*dd
= pci_get_drvdata(pdev
);
157 /* Read the vendorID from the configuration space */
158 pci_read_config_word(pdev
, 0x00, &vendor_id
);
159 if (vendor_id
== 0xFFFF) {
162 set_bit(QUEUE_FLAG_DEAD
, &dd
->queue
->queue_flags
);
164 dev_warn(&dd
->pdev
->dev
,
165 "%s: dd->queue is NULL\n", __func__
);
166 return true; /* device removed */
169 return false; /* device present */
172 /* we have to use runtime tag to setup command header */
173 static void mtip_init_cmd_header(struct request
*rq
)
175 struct driver_data
*dd
= rq
->q
->queuedata
;
176 struct mtip_cmd
*cmd
= blk_mq_rq_to_pdu(rq
);
177 u32 host_cap_64
= readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
;
179 /* Point the command headers at the command tables. */
180 cmd
->command_header
= dd
->port
->command_list
+
181 (sizeof(struct mtip_cmd_hdr
) * rq
->tag
);
182 cmd
->command_header_dma
= dd
->port
->command_list_dma
+
183 (sizeof(struct mtip_cmd_hdr
) * rq
->tag
);
186 cmd
->command_header
->ctbau
= __force_bit2int
cpu_to_le32((cmd
->command_dma
>> 16) >> 16);
188 cmd
->command_header
->ctba
= __force_bit2int
cpu_to_le32(cmd
->command_dma
& 0xFFFFFFFF);
191 static struct mtip_cmd
*mtip_get_int_command(struct driver_data
*dd
)
195 if (mtip_check_surprise_removal(dd
->pdev
))
198 rq
= blk_mq_alloc_request(dd
->queue
, 0, BLK_MQ_REQ_RESERVED
);
202 /* Internal cmd isn't submitted via .queue_rq */
203 mtip_init_cmd_header(rq
);
205 return blk_mq_rq_to_pdu(rq
);
208 static void mtip_put_int_command(struct driver_data
*dd
, struct mtip_cmd
*cmd
)
210 blk_put_request(blk_mq_rq_from_pdu(cmd
));
214 * Once we add support for one hctx per mtip group, this will change a bit
216 static struct request
*mtip_rq_from_tag(struct driver_data
*dd
,
219 struct blk_mq_hw_ctx
*hctx
= dd
->queue
->queue_hw_ctx
[0];
221 return blk_mq_tag_to_rq(hctx
->tags
, tag
);
224 static struct mtip_cmd
*mtip_cmd_from_tag(struct driver_data
*dd
,
227 struct request
*rq
= mtip_rq_from_tag(dd
, tag
);
229 return blk_mq_rq_to_pdu(rq
);
233 * IO completion function.
235 * This completion function is called by the driver ISR when a
236 * command that was issued by the kernel completes. It first calls the
237 * asynchronous completion function which normally calls back into the block
238 * layer passing the asynchronous callback data, then unmaps the
239 * scatter list associated with the completed command, and finally
240 * clears the allocated bit associated with the completed command.
242 * @port Pointer to the port data structure.
243 * @tag Tag of the command.
244 * @data Pointer to driver_data.
245 * @status Completion status.
250 static void mtip_async_complete(struct mtip_port
*port
,
251 int tag
, struct mtip_cmd
*cmd
, int status
)
253 struct driver_data
*dd
= port
->dd
;
256 if (unlikely(!dd
) || unlikely(!port
))
259 if (unlikely(status
== PORT_IRQ_TF_ERR
)) {
260 dev_warn(&port
->dd
->pdev
->dev
,
261 "Command tag %d failed due to TFE\n", tag
);
264 rq
= mtip_rq_from_tag(dd
, tag
);
266 cmd
->status
= status
;
267 blk_mq_complete_request(rq
);
271 * Reset the HBA (without sleeping)
273 * @dd Pointer to the driver data structure.
276 * 0 The reset was successful.
277 * -1 The HBA Reset bit did not clear.
279 static int mtip_hba_reset(struct driver_data
*dd
)
281 unsigned long timeout
;
283 /* Set the reset bit */
284 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
287 readl(dd
->mmio
+ HOST_CTL
);
290 * Spin for up to 10 seconds waiting for reset acknowledgement. Spec
291 * is 1 sec but in LUN failure conditions, up to 10 secs are required
293 timeout
= jiffies
+ msecs_to_jiffies(10000);
296 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))
299 } while ((readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
300 && time_before(jiffies
, timeout
));
302 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
309 * Issue a command to the hardware.
311 * Set the appropriate bit in the s_active and Command Issue hardware
312 * registers, causing hardware command processing to begin.
314 * @port Pointer to the port structure.
315 * @tag The tag of the command to be issued.
320 static inline void mtip_issue_ncq_command(struct mtip_port
*port
, int tag
)
322 int group
= tag
>> 5;
324 /* guard SACT and CI registers */
325 spin_lock(&port
->cmd_issue_lock
[group
]);
326 writel((1 << MTIP_TAG_BIT(tag
)),
327 port
->s_active
[MTIP_TAG_INDEX(tag
)]);
328 writel((1 << MTIP_TAG_BIT(tag
)),
329 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
330 spin_unlock(&port
->cmd_issue_lock
[group
]);
334 * Enable/disable the reception of FIS
336 * @port Pointer to the port data structure
337 * @enable 1 to enable, 0 to disable
340 * Previous state: 1 enabled, 0 disabled
342 static int mtip_enable_fis(struct mtip_port
*port
, int enable
)
346 /* enable FIS reception */
347 tmp
= readl(port
->mmio
+ PORT_CMD
);
349 writel(tmp
| PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
351 writel(tmp
& ~PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
354 readl(port
->mmio
+ PORT_CMD
);
356 return (((tmp
& PORT_CMD_FIS_RX
) == PORT_CMD_FIS_RX
));
360 * Enable/disable the DMA engine
362 * @port Pointer to the port data structure
363 * @enable 1 to enable, 0 to disable
366 * Previous state: 1 enabled, 0 disabled.
368 static int mtip_enable_engine(struct mtip_port
*port
, int enable
)
372 /* enable FIS reception */
373 tmp
= readl(port
->mmio
+ PORT_CMD
);
375 writel(tmp
| PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
377 writel(tmp
& ~PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
379 readl(port
->mmio
+ PORT_CMD
);
380 return (((tmp
& PORT_CMD_START
) == PORT_CMD_START
));
384 * Enables the port DMA engine and FIS reception.
389 static inline void mtip_start_port(struct mtip_port
*port
)
391 /* Enable FIS reception */
392 mtip_enable_fis(port
, 1);
394 /* Enable the DMA engine */
395 mtip_enable_engine(port
, 1);
399 * Deinitialize a port by disabling port interrupts, the DMA engine,
402 * @port Pointer to the port structure
407 static inline void mtip_deinit_port(struct mtip_port
*port
)
409 /* Disable interrupts on this port */
410 writel(0, port
->mmio
+ PORT_IRQ_MASK
);
412 /* Disable the DMA engine */
413 mtip_enable_engine(port
, 0);
415 /* Disable FIS reception */
416 mtip_enable_fis(port
, 0);
422 * This function deinitializes the port by calling mtip_deinit_port() and
423 * then initializes it by setting the command header and RX FIS addresses,
424 * clearing the SError register and any pending port interrupts before
425 * re-enabling the default set of port interrupts.
427 * @port Pointer to the port structure.
432 static void mtip_init_port(struct mtip_port
*port
)
435 mtip_deinit_port(port
);
437 /* Program the command list base and FIS base addresses */
438 if (readl(port
->dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
) {
439 writel((port
->command_list_dma
>> 16) >> 16,
440 port
->mmio
+ PORT_LST_ADDR_HI
);
441 writel((port
->rxfis_dma
>> 16) >> 16,
442 port
->mmio
+ PORT_FIS_ADDR_HI
);
445 writel(port
->command_list_dma
& 0xFFFFFFFF,
446 port
->mmio
+ PORT_LST_ADDR
);
447 writel(port
->rxfis_dma
& 0xFFFFFFFF, port
->mmio
+ PORT_FIS_ADDR
);
450 writel(readl(port
->mmio
+ PORT_SCR_ERR
), port
->mmio
+ PORT_SCR_ERR
);
452 /* reset the completed registers.*/
453 for (i
= 0; i
< port
->dd
->slot_groups
; i
++)
454 writel(0xFFFFFFFF, port
->completed
[i
]);
456 /* Clear any pending interrupts for this port */
457 writel(readl(port
->mmio
+ PORT_IRQ_STAT
), port
->mmio
+ PORT_IRQ_STAT
);
459 /* Clear any pending interrupts on the HBA. */
460 writel(readl(port
->dd
->mmio
+ HOST_IRQ_STAT
),
461 port
->dd
->mmio
+ HOST_IRQ_STAT
);
463 /* Enable port interrupts */
464 writel(DEF_PORT_IRQ
, port
->mmio
+ PORT_IRQ_MASK
);
470 * @port Pointer to the port data structure.
475 static void mtip_restart_port(struct mtip_port
*port
)
477 unsigned long timeout
;
479 /* Disable the DMA engine */
480 mtip_enable_engine(port
, 0);
482 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
483 timeout
= jiffies
+ msecs_to_jiffies(500);
484 while ((readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
)
485 && time_before(jiffies
, timeout
))
488 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
492 * Chip quirk: escalate to hba reset if
493 * PxCMD.CR not clear after 500 ms
495 if (readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
) {
496 dev_warn(&port
->dd
->pdev
->dev
,
497 "PxCMD.CR not clear, escalating reset\n");
499 if (mtip_hba_reset(port
->dd
))
500 dev_err(&port
->dd
->pdev
->dev
,
501 "HBA reset escalation failed.\n");
503 /* 30 ms delay before com reset to quiesce chip */
507 dev_warn(&port
->dd
->pdev
->dev
, "Issuing COM reset\n");
510 writel(readl(port
->mmio
+ PORT_SCR_CTL
) |
511 1, port
->mmio
+ PORT_SCR_CTL
);
512 readl(port
->mmio
+ PORT_SCR_CTL
);
514 /* Wait 1 ms to quiesce chip function */
515 timeout
= jiffies
+ msecs_to_jiffies(1);
516 while (time_before(jiffies
, timeout
))
519 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
522 /* Clear PxSCTL.DET */
523 writel(readl(port
->mmio
+ PORT_SCR_CTL
) & ~1,
524 port
->mmio
+ PORT_SCR_CTL
);
525 readl(port
->mmio
+ PORT_SCR_CTL
);
527 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
528 timeout
= jiffies
+ msecs_to_jiffies(500);
529 while (((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
530 && time_before(jiffies
, timeout
))
533 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
536 if ((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
537 dev_warn(&port
->dd
->pdev
->dev
,
538 "COM reset failed\n");
540 mtip_init_port(port
);
541 mtip_start_port(port
);
545 static int mtip_device_reset(struct driver_data
*dd
)
549 if (mtip_check_surprise_removal(dd
->pdev
))
552 if (mtip_hba_reset(dd
) < 0)
556 mtip_init_port(dd
->port
);
557 mtip_start_port(dd
->port
);
559 /* Enable interrupts on the HBA. */
560 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
561 dd
->mmio
+ HOST_CTL
);
566 * Helper function for tag logging
568 static void print_tags(struct driver_data
*dd
,
570 unsigned long *tagbits
,
573 unsigned char tagmap
[128];
574 int group
, tagmap_len
= 0;
576 memset(tagmap
, 0, sizeof(tagmap
));
577 for (group
= SLOTBITS_IN_LONGS
; group
> 0; group
--)
578 tagmap_len
+= sprintf(tagmap
+ tagmap_len
, "%016lX ",
580 dev_warn(&dd
->pdev
->dev
,
581 "%d command(s) %s: tagmap [%s]", cnt
, msg
, tagmap
);
585 * Internal command completion callback function.
587 * This function is normally called by the driver ISR when an internal
588 * command completed. This function signals the command completion by
589 * calling complete().
591 * @port Pointer to the port data structure.
592 * @tag Tag of the command that has completed.
593 * @data Pointer to a completion structure.
594 * @status Completion status.
599 static void mtip_completion(struct mtip_port
*port
,
600 int tag
, struct mtip_cmd
*command
, int status
)
602 struct completion
*waiting
= command
->comp_data
;
603 if (unlikely(status
== PORT_IRQ_TF_ERR
))
604 dev_warn(&port
->dd
->pdev
->dev
,
605 "Internal command %d completed with TFE\n", tag
);
607 command
->comp_func
= NULL
;
608 command
->comp_data
= NULL
;
612 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
613 dma_addr_t buffer_dma
, unsigned int sectors
);
614 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
615 struct smart_attr
*attrib
);
619 * @dd Pointer to the DRIVER_DATA structure.
624 static void mtip_handle_tfe(struct driver_data
*dd
)
626 int group
, tag
, bit
, reissue
, rv
;
627 struct mtip_port
*port
;
628 struct mtip_cmd
*cmd
;
630 struct host_to_dev_fis
*fis
;
631 unsigned long tagaccum
[SLOTBITS_IN_LONGS
];
632 unsigned int cmd_cnt
= 0;
634 char *fail_reason
= NULL
;
635 int fail_all_ncq_write
= 0, fail_all_ncq_cmds
= 0;
637 dev_warn(&dd
->pdev
->dev
, "Taskfile error\n");
641 if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
)) {
642 cmd
= mtip_cmd_from_tag(dd
, MTIP_TAG_INTERNAL
);
643 dbg_printk(MTIP_DRV_NAME
" TFE for the internal command\n");
645 if (cmd
->comp_data
&& cmd
->comp_func
) {
646 cmd
->comp_func(port
, MTIP_TAG_INTERNAL
,
647 cmd
, PORT_IRQ_TF_ERR
);
652 /* clear the tag accumulator */
653 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
655 /* Loop through all the groups */
656 for (group
= 0; group
< dd
->slot_groups
; group
++) {
657 completed
= readl(port
->completed
[group
]);
659 dev_warn(&dd
->pdev
->dev
, "g=%u, comp=%x\n", group
, completed
);
661 /* clear completed status register in the hardware.*/
662 writel(completed
, port
->completed
[group
]);
664 /* Process successfully completed commands */
665 for (bit
= 0; bit
< 32 && completed
; bit
++) {
666 if (!(completed
& (1<<bit
)))
668 tag
= (group
<< 5) + bit
;
670 /* Skip the internal command slot */
671 if (tag
== MTIP_TAG_INTERNAL
)
674 cmd
= mtip_cmd_from_tag(dd
, tag
);
675 if (likely(cmd
->comp_func
)) {
676 set_bit(tag
, tagaccum
);
678 cmd
->comp_func(port
, tag
, cmd
, 0);
680 dev_err(&port
->dd
->pdev
->dev
,
681 "Missing completion func for tag %d",
683 if (mtip_check_surprise_removal(dd
->pdev
)) {
684 /* don't proceed further */
691 print_tags(dd
, "completed (TFE)", tagaccum
, cmd_cnt
);
693 /* Restart the port */
695 mtip_restart_port(port
);
697 /* Trying to determine the cause of the error */
698 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
700 dd
->port
->log_buf_dma
, 1);
702 dev_warn(&dd
->pdev
->dev
,
703 "Error in READ LOG EXT (10h) command\n");
704 /* non-critical error, don't fail the load */
706 buf
= (unsigned char *)dd
->port
->log_buf
;
707 if (buf
[259] & 0x1) {
708 dev_info(&dd
->pdev
->dev
,
709 "Write protect bit is set.\n");
710 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
711 fail_all_ncq_write
= 1;
712 fail_reason
= "write protect";
714 if (buf
[288] == 0xF7) {
715 dev_info(&dd
->pdev
->dev
,
716 "Exceeded Tmax, drive in thermal shutdown.\n");
717 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
718 fail_all_ncq_cmds
= 1;
719 fail_reason
= "thermal shutdown";
721 if (buf
[288] == 0xBF) {
722 set_bit(MTIP_DDF_REBUILD_FAILED_BIT
, &dd
->dd_flag
);
723 dev_info(&dd
->pdev
->dev
,
724 "Drive indicates rebuild has failed. Secure erase required.\n");
725 fail_all_ncq_cmds
= 1;
726 fail_reason
= "rebuild failed";
730 /* clear the tag accumulator */
731 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
733 /* Loop through all the groups */
734 for (group
= 0; group
< dd
->slot_groups
; group
++) {
735 for (bit
= 0; bit
< 32; bit
++) {
737 tag
= (group
<< 5) + bit
;
738 cmd
= mtip_cmd_from_tag(dd
, tag
);
740 fis
= (struct host_to_dev_fis
*)cmd
->command
;
742 /* Should re-issue? */
743 if (tag
== MTIP_TAG_INTERNAL
||
744 fis
->command
== ATA_CMD_SET_FEATURES
)
747 if (fail_all_ncq_cmds
||
748 (fail_all_ncq_write
&&
749 fis
->command
== ATA_CMD_FPDMA_WRITE
)) {
750 dev_warn(&dd
->pdev
->dev
,
751 " Fail: %s w/tag %d [%s].\n",
752 fis
->command
== ATA_CMD_FPDMA_WRITE
?
755 fail_reason
!= NULL
?
756 fail_reason
: "unknown");
757 if (cmd
->comp_func
) {
758 cmd
->comp_func(port
, tag
,
766 * First check if this command has
767 * exceeded its retries.
769 if (reissue
&& (cmd
->retries
-- > 0)) {
771 set_bit(tag
, tagaccum
);
773 /* Re-issue the command. */
774 mtip_issue_ncq_command(port
, tag
);
779 /* Retire a command that will not be reissued */
780 dev_warn(&port
->dd
->pdev
->dev
,
781 "retiring tag %d\n", tag
);
784 cmd
->comp_func(port
, tag
, cmd
, PORT_IRQ_TF_ERR
);
786 dev_warn(&port
->dd
->pdev
->dev
,
787 "Bad completion for tag %d\n",
791 print_tags(dd
, "reissued (TFE)", tagaccum
, cmd_cnt
);
795 * Handle a set device bits interrupt
797 static inline void mtip_workq_sdbfx(struct mtip_port
*port
, int group
,
800 struct driver_data
*dd
= port
->dd
;
802 struct mtip_cmd
*command
;
805 WARN_ON_ONCE(!completed
);
808 /* clear completed status register in the hardware.*/
809 writel(completed
, port
->completed
[group
]);
811 /* Process completed commands. */
812 for (bit
= 0; (bit
< 32) && completed
; bit
++) {
813 if (completed
& 0x01) {
814 tag
= (group
<< 5) | bit
;
816 /* skip internal command slot. */
817 if (unlikely(tag
== MTIP_TAG_INTERNAL
))
820 command
= mtip_cmd_from_tag(dd
, tag
);
821 if (likely(command
->comp_func
))
822 command
->comp_func(port
, tag
, command
, 0);
824 dev_dbg(&dd
->pdev
->dev
,
825 "Null completion for tag %d",
828 if (mtip_check_surprise_removal(
837 /* If last, re-enable interrupts */
838 if (atomic_dec_return(&dd
->irq_workers_active
) == 0)
839 writel(0xffffffff, dd
->mmio
+ HOST_IRQ_STAT
);
843 * Process legacy pio and d2h interrupts
845 static inline void mtip_process_legacy(struct driver_data
*dd
, u32 port_stat
)
847 struct mtip_port
*port
= dd
->port
;
848 struct mtip_cmd
*cmd
= mtip_cmd_from_tag(dd
, MTIP_TAG_INTERNAL
);
850 if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
) &&
851 (cmd
!= NULL
) && !(readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
852 & (1 << MTIP_TAG_INTERNAL
))) {
853 if (cmd
->comp_func
) {
854 cmd
->comp_func(port
, MTIP_TAG_INTERNAL
, cmd
, 0);
863 * Demux and handle errors
865 static inline void mtip_process_errors(struct driver_data
*dd
, u32 port_stat
)
868 if (unlikely(port_stat
& PORT_IRQ_CONNECT
)) {
869 dev_warn(&dd
->pdev
->dev
,
870 "Clearing PxSERR.DIAG.x\n");
871 writel((1 << 26), dd
->port
->mmio
+ PORT_SCR_ERR
);
874 if (unlikely(port_stat
& PORT_IRQ_PHYRDY
)) {
875 dev_warn(&dd
->pdev
->dev
,
876 "Clearing PxSERR.DIAG.n\n");
877 writel((1 << 16), dd
->port
->mmio
+ PORT_SCR_ERR
);
880 if (unlikely(port_stat
& ~PORT_IRQ_HANDLED
)) {
881 dev_warn(&dd
->pdev
->dev
,
882 "Port stat errors %x unhandled\n",
883 (port_stat
& ~PORT_IRQ_HANDLED
));
884 if (mtip_check_surprise_removal(dd
->pdev
))
887 if (likely(port_stat
& (PORT_IRQ_TF_ERR
| PORT_IRQ_IF_ERR
))) {
888 set_bit(MTIP_PF_EH_ACTIVE_BIT
, &dd
->port
->flags
);
889 wake_up_interruptible(&dd
->port
->svc_wait
);
893 static inline irqreturn_t
mtip_handle_irq(struct driver_data
*data
)
895 struct driver_data
*dd
= (struct driver_data
*) data
;
896 struct mtip_port
*port
= dd
->port
;
897 u32 hba_stat
, port_stat
;
899 int do_irq_enable
= 1, i
, workers
;
900 struct mtip_work
*twork
;
902 hba_stat
= readl(dd
->mmio
+ HOST_IRQ_STAT
);
906 /* Acknowledge the interrupt status on the port.*/
907 port_stat
= readl(port
->mmio
+ PORT_IRQ_STAT
);
908 if (unlikely(port_stat
== 0xFFFFFFFF)) {
909 mtip_check_surprise_removal(dd
->pdev
);
912 writel(port_stat
, port
->mmio
+ PORT_IRQ_STAT
);
914 /* Demux port status */
915 if (likely(port_stat
& PORT_IRQ_SDB_FIS
)) {
917 WARN_ON_ONCE(atomic_read(&dd
->irq_workers_active
) != 0);
919 /* Start at 1: group zero is always local? */
920 for (i
= 0, workers
= 0; i
< MTIP_MAX_SLOT_GROUPS
;
922 twork
= &dd
->work
[i
];
923 twork
->completed
= readl(port
->completed
[i
]);
924 if (twork
->completed
)
928 atomic_set(&dd
->irq_workers_active
, workers
);
930 for (i
= 1; i
< MTIP_MAX_SLOT_GROUPS
; i
++) {
931 twork
= &dd
->work
[i
];
932 if (twork
->completed
)
939 if (likely(dd
->work
[0].completed
))
940 mtip_workq_sdbfx(port
, 0,
941 dd
->work
[0].completed
);
945 * Chip quirk: SDB interrupt but nothing
952 if (unlikely(port_stat
& PORT_IRQ_ERR
)) {
953 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
954 /* don't proceed further */
957 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
961 mtip_process_errors(dd
, port_stat
& PORT_IRQ_ERR
);
964 if (unlikely(port_stat
& PORT_IRQ_LEGACY
))
965 mtip_process_legacy(dd
, port_stat
& PORT_IRQ_LEGACY
);
968 /* acknowledge interrupt */
969 if (unlikely(do_irq_enable
))
970 writel(hba_stat
, dd
->mmio
+ HOST_IRQ_STAT
);
976 * HBA interrupt subroutine.
979 * @instance Pointer to the driver data structure.
982 * IRQ_HANDLED A HBA interrupt was pending and handled.
983 * IRQ_NONE This interrupt was not for the HBA.
985 static irqreturn_t
mtip_irq_handler(int irq
, void *instance
)
987 struct driver_data
*dd
= instance
;
989 return mtip_handle_irq(dd
);
992 static void mtip_issue_non_ncq_command(struct mtip_port
*port
, int tag
)
994 writel(1 << MTIP_TAG_BIT(tag
),
995 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
998 static bool mtip_pause_ncq(struct mtip_port
*port
,
999 struct host_to_dev_fis
*fis
)
1001 struct host_to_dev_fis
*reply
;
1002 unsigned long task_file_data
;
1004 reply
= port
->rxfis
+ RX_FIS_D2H_REG
;
1005 task_file_data
= readl(port
->mmio
+PORT_TFDATA
);
1007 if ((task_file_data
& 1))
1010 if (fis
->command
== ATA_CMD_SEC_ERASE_PREP
) {
1011 port
->ic_pause_timer
= jiffies
;
1013 } else if ((fis
->command
== ATA_CMD_DOWNLOAD_MICRO
) &&
1014 (fis
->features
== 0x03)) {
1015 set_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1016 port
->ic_pause_timer
= jiffies
;
1018 } else if ((fis
->command
== ATA_CMD_SEC_ERASE_UNIT
) ||
1019 ((fis
->command
== 0xFC) &&
1020 (fis
->features
== 0x27 || fis
->features
== 0x72 ||
1021 fis
->features
== 0x62 || fis
->features
== 0x26))) {
1022 clear_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1023 clear_bit(MTIP_DDF_REBUILD_FAILED_BIT
, &port
->dd
->dd_flag
);
1024 /* Com reset after secure erase or lowlevel format */
1025 mtip_restart_port(port
);
1026 clear_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1034 * Wait for port to quiesce
1036 * @port Pointer to port data structure
1037 * @timeout Max duration to wait (ms)
1041 * -EBUSY Commands still active
1043 static int mtip_quiesce_io(struct mtip_port
*port
, unsigned long timeout
)
1047 unsigned int active
= 1;
1049 blk_mq_stop_hw_queues(port
->dd
->queue
);
1051 to
= jiffies
+ msecs_to_jiffies(timeout
);
1053 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
) &&
1054 test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
1056 continue; /* svc thd is actively issuing commands */
1061 if (mtip_check_surprise_removal(port
->dd
->pdev
))
1065 * Ignore s_active bit 0 of array element 0.
1066 * This bit will always be set
1068 active
= readl(port
->s_active
[0]) & 0xFFFFFFFE;
1069 for (n
= 1; n
< port
->dd
->slot_groups
; n
++)
1070 active
|= readl(port
->s_active
[n
]);
1074 } while (time_before(jiffies
, to
));
1076 blk_mq_start_stopped_hw_queues(port
->dd
->queue
, true);
1077 return active
? -EBUSY
: 0;
1079 blk_mq_start_stopped_hw_queues(port
->dd
->queue
, true);
1084 * Execute an internal command and wait for the completion.
1086 * @port Pointer to the port data structure.
1087 * @fis Pointer to the FIS that describes the command.
1088 * @fis_len Length in WORDS of the FIS.
1089 * @buffer DMA accessible for command data.
1090 * @buf_len Length, in bytes, of the data buffer.
1091 * @opts Command header options, excluding the FIS length
1092 * and the number of PRD entries.
1093 * @timeout Time in ms to wait for the command to complete.
1096 * 0 Command completed successfully.
1097 * -EFAULT The buffer address is not correctly aligned.
1098 * -EBUSY Internal command or other IO in progress.
1099 * -EAGAIN Time out waiting for command to complete.
1101 static int mtip_exec_internal_command(struct mtip_port
*port
,
1102 struct host_to_dev_fis
*fis
,
1107 unsigned long timeout
)
1109 struct mtip_cmd_sg
*command_sg
;
1110 DECLARE_COMPLETION_ONSTACK(wait
);
1111 struct mtip_cmd
*int_cmd
;
1112 struct driver_data
*dd
= port
->dd
;
1114 unsigned long start
;
1116 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
1117 if (buffer
& 0x00000007) {
1118 dev_err(&dd
->pdev
->dev
, "SG buffer is not 8 byte aligned\n");
1122 int_cmd
= mtip_get_int_command(dd
);
1124 dbg_printk(MTIP_DRV_NAME
"Unable to allocate tag for PIO cmd\n");
1128 set_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1130 if (fis
->command
== ATA_CMD_SEC_ERASE_PREP
)
1131 set_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1133 clear_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1135 if (fis
->command
!= ATA_CMD_STANDBYNOW1
) {
1136 /* wait for io to complete if non atomic */
1137 if (mtip_quiesce_io(port
, MTIP_QUIESCE_IO_TIMEOUT_MS
) < 0) {
1138 dev_warn(&dd
->pdev
->dev
, "Failed to quiesce IO\n");
1139 mtip_put_int_command(dd
, int_cmd
);
1140 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1141 wake_up_interruptible(&port
->svc_wait
);
1146 /* Set the completion function and data for the command. */
1147 int_cmd
->comp_data
= &wait
;
1148 int_cmd
->comp_func
= mtip_completion
;
1150 /* Copy the command to the command table */
1151 memcpy(int_cmd
->command
, fis
, fis_len
*4);
1153 /* Populate the SG list */
1154 int_cmd
->command_header
->opts
=
1155 __force_bit2int
cpu_to_le32(opts
| fis_len
);
1157 command_sg
= int_cmd
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1160 __force_bit2int
cpu_to_le32((buf_len
-1) & 0x3FFFFF);
1162 __force_bit2int
cpu_to_le32(buffer
& 0xFFFFFFFF);
1163 command_sg
->dba_upper
=
1164 __force_bit2int
cpu_to_le32((buffer
>> 16) >> 16);
1166 int_cmd
->command_header
->opts
|=
1167 __force_bit2int
cpu_to_le32((1 << 16));
1170 /* Populate the command header */
1171 int_cmd
->command_header
->byte_count
= 0;
1175 /* Issue the command to the hardware */
1176 mtip_issue_non_ncq_command(port
, MTIP_TAG_INTERNAL
);
1178 /* Wait for the command to complete or timeout. */
1179 rv
= wait_for_completion_interruptible_timeout(&wait
,
1180 msecs_to_jiffies(timeout
));
1182 if (rv
== -ERESTARTSYS
) { /* interrupted */
1183 dev_err(&dd
->pdev
->dev
,
1184 "Internal command [%02X] was interrupted after %u ms\n",
1186 jiffies_to_msecs(jiffies
- start
));
1189 } else if (rv
== 0) /* timeout */
1190 dev_err(&dd
->pdev
->dev
,
1191 "Internal command did not complete [%02X] within timeout of %lu ms\n",
1192 fis
->command
, timeout
);
1194 dev_err(&dd
->pdev
->dev
,
1195 "Internal command [%02X] wait returned code [%d] after %lu ms - unhandled\n",
1196 fis
->command
, rv
, timeout
);
1198 if (mtip_check_surprise_removal(dd
->pdev
) ||
1199 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1201 dev_err(&dd
->pdev
->dev
,
1202 "Internal command [%02X] wait returned due to SR\n",
1207 mtip_device_reset(dd
); /* recover from timeout issue */
1213 if (readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1214 & (1 << MTIP_TAG_INTERNAL
)) {
1216 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)) {
1217 mtip_device_reset(dd
);
1222 /* Clear the allocated and active bits for the internal command. */
1223 mtip_put_int_command(dd
, int_cmd
);
1224 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1225 if (rv
>= 0 && mtip_pause_ncq(port
, fis
)) {
1229 wake_up_interruptible(&port
->svc_wait
);
1235 * Byte-swap ATA ID strings.
1237 * ATA identify data contains strings in byte-swapped 16-bit words.
1238 * They must be swapped (on all architectures) to be usable as C strings.
1239 * This function swaps bytes in-place.
1241 * @buf The buffer location of the string
1242 * @len The number of bytes to swap
1247 static inline void ata_swap_string(u16
*buf
, unsigned int len
)
1250 for (i
= 0; i
< (len
/2); i
++)
1251 be16_to_cpus(&buf
[i
]);
1254 static void mtip_set_timeout(struct driver_data
*dd
,
1255 struct host_to_dev_fis
*fis
,
1256 unsigned int *timeout
, u8 erasemode
)
1258 switch (fis
->command
) {
1259 case ATA_CMD_DOWNLOAD_MICRO
:
1260 *timeout
= 120000; /* 2 minutes */
1262 case ATA_CMD_SEC_ERASE_UNIT
:
1265 *timeout
= ((*(dd
->port
->identify
+ 90) * 2) * 60000);
1267 *timeout
= ((*(dd
->port
->identify
+ 89) * 2) * 60000);
1269 case ATA_CMD_STANDBYNOW1
:
1270 *timeout
= 120000; /* 2 minutes */
1274 *timeout
= 60000; /* 60 seconds */
1277 *timeout
= 15000; /* 15 seconds */
1280 *timeout
= MTIP_IOCTL_CMD_TIMEOUT_MS
;
1286 * Request the device identity information.
1288 * If a user space buffer is not specified, i.e. is NULL, the
1289 * identify information is still read from the drive and placed
1290 * into the identify data buffer (@e port->identify) in the
1291 * port data structure.
1292 * When the identify buffer contains valid identify information @e
1293 * port->identify_valid is non-zero.
1295 * @port Pointer to the port structure.
1296 * @user_buffer A user space buffer where the identify data should be
1300 * 0 Command completed successfully.
1301 * -EFAULT An error occurred while coping data to the user buffer.
1302 * -1 Command failed.
1304 static int mtip_get_identify(struct mtip_port
*port
, void __user
*user_buffer
)
1307 struct host_to_dev_fis fis
;
1309 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1312 /* Build the FIS. */
1313 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1316 fis
.command
= ATA_CMD_ID_ATA
;
1318 /* Set the identify information as invalid. */
1319 port
->identify_valid
= 0;
1321 /* Clear the identify information. */
1322 memset(port
->identify
, 0, sizeof(u16
) * ATA_ID_WORDS
);
1324 /* Execute the command. */
1325 if (mtip_exec_internal_command(port
,
1329 sizeof(u16
) * ATA_ID_WORDS
,
1331 MTIP_INT_CMD_TIMEOUT_MS
)
1338 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1339 * perform field-sensitive swapping on the string fields.
1340 * See the kernel use of ata_id_string() for proof of this.
1342 #ifdef __LITTLE_ENDIAN
1343 ata_swap_string(port
->identify
+ 27, 40); /* model string*/
1344 ata_swap_string(port
->identify
+ 23, 8); /* firmware string*/
1345 ata_swap_string(port
->identify
+ 10, 20); /* serial# string*/
1349 for (i
= 0; i
< ATA_ID_WORDS
; i
++)
1350 port
->identify
[i
] = le16_to_cpu(port
->identify
[i
]);
1354 /* Check security locked state */
1355 if (port
->identify
[128] & 0x4)
1356 set_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1358 clear_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1360 #ifdef MTIP_TRIM /* Disabling TRIM support temporarily */
1361 /* Demux ID.DRAT & ID.RZAT to determine trim support */
1362 if (port
->identify
[69] & (1 << 14) && port
->identify
[69] & (1 << 5))
1363 port
->dd
->trim_supp
= true;
1366 port
->dd
->trim_supp
= false;
1368 /* Set the identify buffer as valid. */
1369 port
->identify_valid
= 1;
1375 ATA_ID_WORDS
* sizeof(u16
))) {
1386 * Issue a standby immediate command to the device.
1388 * @port Pointer to the port structure.
1391 * 0 Command was executed successfully.
1392 * -1 An error occurred while executing the command.
1394 static int mtip_standby_immediate(struct mtip_port
*port
)
1397 struct host_to_dev_fis fis
;
1398 unsigned long start
;
1399 unsigned int timeout
;
1401 /* Build the FIS. */
1402 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1405 fis
.command
= ATA_CMD_STANDBYNOW1
;
1407 mtip_set_timeout(port
->dd
, &fis
, &timeout
, 0);
1410 rv
= mtip_exec_internal_command(port
,
1417 dbg_printk(MTIP_DRV_NAME
"Time taken to complete standby cmd: %d ms\n",
1418 jiffies_to_msecs(jiffies
- start
));
1420 dev_warn(&port
->dd
->pdev
->dev
,
1421 "STANDBY IMMEDIATE command failed.\n");
1427 * Issue a READ LOG EXT command to the device.
1429 * @port pointer to the port structure.
1430 * @page page number to fetch
1431 * @buffer pointer to buffer
1432 * @buffer_dma dma address corresponding to @buffer
1433 * @sectors page length to fetch, in sectors
1436 * @rv return value from mtip_exec_internal_command()
1438 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
1439 dma_addr_t buffer_dma
, unsigned int sectors
)
1441 struct host_to_dev_fis fis
;
1443 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1446 fis
.command
= ATA_CMD_READ_LOG_EXT
;
1447 fis
.sect_count
= sectors
& 0xFF;
1448 fis
.sect_cnt_ex
= (sectors
>> 8) & 0xFF;
1451 fis
.device
= ATA_DEVICE_OBS
;
1453 memset(buffer
, 0, sectors
* ATA_SECT_SIZE
);
1455 return mtip_exec_internal_command(port
,
1459 sectors
* ATA_SECT_SIZE
,
1461 MTIP_INT_CMD_TIMEOUT_MS
);
1465 * Issue a SMART READ DATA command to the device.
1467 * @port pointer to the port structure.
1468 * @buffer pointer to buffer
1469 * @buffer_dma dma address corresponding to @buffer
1472 * @rv return value from mtip_exec_internal_command()
1474 static int mtip_get_smart_data(struct mtip_port
*port
, u8
*buffer
,
1475 dma_addr_t buffer_dma
)
1477 struct host_to_dev_fis fis
;
1479 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1482 fis
.command
= ATA_CMD_SMART
;
1483 fis
.features
= 0xD0;
1487 fis
.device
= ATA_DEVICE_OBS
;
1489 return mtip_exec_internal_command(port
,
1499 * Get the value of a smart attribute
1501 * @port pointer to the port structure
1502 * @id attribute number
1503 * @attrib pointer to return attrib information corresponding to @id
1506 * -EINVAL NULL buffer passed or unsupported attribute @id.
1507 * -EPERM Identify data not valid, SMART not supported or not enabled
1509 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
1510 struct smart_attr
*attrib
)
1513 struct smart_attr
*pattr
;
1518 if (!port
->identify_valid
) {
1519 dev_warn(&port
->dd
->pdev
->dev
, "IDENTIFY DATA not valid\n");
1522 if (!(port
->identify
[82] & 0x1)) {
1523 dev_warn(&port
->dd
->pdev
->dev
, "SMART not supported\n");
1526 if (!(port
->identify
[85] & 0x1)) {
1527 dev_warn(&port
->dd
->pdev
->dev
, "SMART not enabled\n");
1531 memset(port
->smart_buf
, 0, ATA_SECT_SIZE
);
1532 rv
= mtip_get_smart_data(port
, port
->smart_buf
, port
->smart_buf_dma
);
1534 dev_warn(&port
->dd
->pdev
->dev
, "Failed to ge SMART data\n");
1538 pattr
= (struct smart_attr
*)(port
->smart_buf
+ 2);
1539 for (i
= 0; i
< 29; i
++, pattr
++)
1540 if (pattr
->attr_id
== id
) {
1541 memcpy(attrib
, pattr
, sizeof(struct smart_attr
));
1546 dev_warn(&port
->dd
->pdev
->dev
,
1547 "Query for invalid SMART attribute ID\n");
1555 * Trim unused sectors
1557 * @dd pointer to driver_data structure
1559 * @len # of 512b sectors to trim
1562 * -ENOMEM Out of dma memory
1563 * -EINVAL Invalid parameters passed in, trim not supported
1564 * -EIO Error submitting trim request to hw
1566 static int mtip_send_trim(struct driver_data
*dd
, unsigned int lba
,
1570 u64 tlba
, tlen
, sect_left
;
1571 struct mtip_trim_entry
*buf
;
1572 dma_addr_t dma_addr
;
1573 struct host_to_dev_fis fis
;
1575 if (!len
|| dd
->trim_supp
== false)
1578 /* Trim request too big */
1579 WARN_ON(len
> (MTIP_MAX_TRIM_ENTRY_LEN
* MTIP_MAX_TRIM_ENTRIES
));
1581 /* Trim request not aligned on 4k boundary */
1582 WARN_ON(len
% 8 != 0);
1584 /* Warn if vu_trim structure is too big */
1585 WARN_ON(sizeof(struct mtip_trim
) > ATA_SECT_SIZE
);
1587 /* Allocate a DMA buffer for the trim structure */
1588 buf
= dmam_alloc_coherent(&dd
->pdev
->dev
, ATA_SECT_SIZE
, &dma_addr
,
1592 memset(buf
, 0, ATA_SECT_SIZE
);
1594 for (i
= 0, sect_left
= len
, tlba
= lba
;
1595 i
< MTIP_MAX_TRIM_ENTRIES
&& sect_left
;
1597 tlen
= (sect_left
>= MTIP_MAX_TRIM_ENTRY_LEN
?
1598 MTIP_MAX_TRIM_ENTRY_LEN
:
1600 buf
[i
].lba
= __force_bit2int
cpu_to_le32(tlba
);
1601 buf
[i
].range
= __force_bit2int
cpu_to_le16(tlen
);
1605 WARN_ON(sect_left
!= 0);
1608 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1612 fis
.features
= 0x60;
1614 fis
.device
= ATA_DEVICE_OBS
;
1616 if (mtip_exec_internal_command(dd
->port
,
1622 MTIP_TRIM_TIMEOUT_MS
) < 0)
1625 dmam_free_coherent(&dd
->pdev
->dev
, ATA_SECT_SIZE
, buf
, dma_addr
);
1630 * Get the drive capacity.
1632 * @dd Pointer to the device data structure.
1633 * @sectors Pointer to the variable that will receive the sector count.
1636 * 1 Capacity was returned successfully.
1637 * 0 The identify information is invalid.
1639 static bool mtip_hw_get_capacity(struct driver_data
*dd
, sector_t
*sectors
)
1641 struct mtip_port
*port
= dd
->port
;
1642 u64 total
, raw0
, raw1
, raw2
, raw3
;
1643 raw0
= port
->identify
[100];
1644 raw1
= port
->identify
[101];
1645 raw2
= port
->identify
[102];
1646 raw3
= port
->identify
[103];
1647 total
= raw0
| raw1
<<16 | raw2
<<32 | raw3
<<48;
1649 return (bool) !!port
->identify_valid
;
1653 * Display the identify command data.
1655 * @port Pointer to the port data structure.
1660 static void mtip_dump_identify(struct mtip_port
*port
)
1663 unsigned short revid
;
1666 if (!port
->identify_valid
)
1669 strlcpy(cbuf
, (char *)(port
->identify
+10), 21);
1670 dev_info(&port
->dd
->pdev
->dev
,
1671 "Serial No.: %s\n", cbuf
);
1673 strlcpy(cbuf
, (char *)(port
->identify
+23), 9);
1674 dev_info(&port
->dd
->pdev
->dev
,
1675 "Firmware Ver.: %s\n", cbuf
);
1677 strlcpy(cbuf
, (char *)(port
->identify
+27), 41);
1678 dev_info(&port
->dd
->pdev
->dev
, "Model: %s\n", cbuf
);
1680 dev_info(&port
->dd
->pdev
->dev
, "Security: %04x %s\n",
1681 port
->identify
[128],
1682 port
->identify
[128] & 0x4 ? "(LOCKED)" : "");
1684 if (mtip_hw_get_capacity(port
->dd
, §ors
))
1685 dev_info(&port
->dd
->pdev
->dev
,
1686 "Capacity: %llu sectors (%llu MB)\n",
1688 ((u64
)sectors
) * ATA_SECT_SIZE
>> 20);
1690 pci_read_config_word(port
->dd
->pdev
, PCI_REVISION_ID
, &revid
);
1691 switch (revid
& 0xFF) {
1693 strlcpy(cbuf
, "A0", 3);
1696 strlcpy(cbuf
, "A2", 3);
1699 strlcpy(cbuf
, "?", 2);
1702 dev_info(&port
->dd
->pdev
->dev
,
1703 "Card Type: %s\n", cbuf
);
1707 * Map the commands scatter list into the command table.
1709 * @command Pointer to the command.
1710 * @nents Number of scatter list entries.
1715 static inline void fill_command_sg(struct driver_data
*dd
,
1716 struct mtip_cmd
*command
,
1720 unsigned int dma_len
;
1721 struct mtip_cmd_sg
*command_sg
;
1722 struct scatterlist
*sg
= command
->sg
;
1724 command_sg
= command
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1726 for (n
= 0; n
< nents
; n
++) {
1727 dma_len
= sg_dma_len(sg
);
1728 if (dma_len
> 0x400000)
1729 dev_err(&dd
->pdev
->dev
,
1730 "DMA segment length truncated\n");
1731 command_sg
->info
= __force_bit2int
1732 cpu_to_le32((dma_len
-1) & 0x3FFFFF);
1733 command_sg
->dba
= __force_bit2int
1734 cpu_to_le32(sg_dma_address(sg
));
1735 command_sg
->dba_upper
= __force_bit2int
1736 cpu_to_le32((sg_dma_address(sg
) >> 16) >> 16);
1743 * @brief Execute a drive command.
1745 * return value 0 The command completed successfully.
1746 * return value -1 An error occurred while executing the command.
1748 static int exec_drive_task(struct mtip_port
*port
, u8
*command
)
1750 struct host_to_dev_fis fis
;
1751 struct host_to_dev_fis
*reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1754 /* Build the FIS. */
1755 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1758 fis
.command
= command
[0];
1759 fis
.features
= command
[1];
1760 fis
.sect_count
= command
[2];
1761 fis
.sector
= command
[3];
1762 fis
.cyl_low
= command
[4];
1763 fis
.cyl_hi
= command
[5];
1764 fis
.device
= command
[6] & ~0x10; /* Clear the dev bit*/
1766 mtip_set_timeout(port
->dd
, &fis
, &to
, 0);
1768 dbg_printk(MTIP_DRV_NAME
" %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
1778 /* Execute the command. */
1779 if (mtip_exec_internal_command(port
,
1789 command
[0] = reply
->command
; /* Status*/
1790 command
[1] = reply
->features
; /* Error*/
1791 command
[4] = reply
->cyl_low
;
1792 command
[5] = reply
->cyl_hi
;
1794 dbg_printk(MTIP_DRV_NAME
" %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
1805 * @brief Execute a drive command.
1807 * @param port Pointer to the port data structure.
1808 * @param command Pointer to the user specified command parameters.
1809 * @param user_buffer Pointer to the user space buffer where read sector
1810 * data should be copied.
1812 * return value 0 The command completed successfully.
1813 * return value -EFAULT An error occurred while copying the completion
1814 * data to the user space buffer.
1815 * return value -1 An error occurred while executing the command.
1817 static int exec_drive_command(struct mtip_port
*port
, u8
*command
,
1818 void __user
*user_buffer
)
1820 struct host_to_dev_fis fis
;
1821 struct host_to_dev_fis
*reply
;
1823 dma_addr_t dma_addr
= 0;
1824 int rv
= 0, xfer_sz
= command
[3];
1831 buf
= dmam_alloc_coherent(&port
->dd
->pdev
->dev
,
1832 ATA_SECT_SIZE
* xfer_sz
,
1836 dev_err(&port
->dd
->pdev
->dev
,
1837 "Memory allocation failed (%d bytes)\n",
1838 ATA_SECT_SIZE
* xfer_sz
);
1841 memset(buf
, 0, ATA_SECT_SIZE
* xfer_sz
);
1844 /* Build the FIS. */
1845 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1848 fis
.command
= command
[0];
1849 fis
.features
= command
[2];
1850 fis
.sect_count
= command
[3];
1851 if (fis
.command
== ATA_CMD_SMART
) {
1852 fis
.sector
= command
[1];
1857 mtip_set_timeout(port
->dd
, &fis
, &to
, 0);
1860 reply
= (port
->rxfis
+ RX_FIS_PIO_SETUP
);
1862 reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1864 dbg_printk(MTIP_DRV_NAME
1865 " %s: User Command: cmd %x, sect %x, "
1866 "feat %x, sectcnt %x\n",
1873 /* Execute the command. */
1874 if (mtip_exec_internal_command(port
,
1877 (xfer_sz
? dma_addr
: 0),
1878 (xfer_sz
? ATA_SECT_SIZE
* xfer_sz
: 0),
1883 goto exit_drive_command
;
1886 /* Collect the completion status. */
1887 command
[0] = reply
->command
; /* Status*/
1888 command
[1] = reply
->features
; /* Error*/
1889 command
[2] = reply
->sect_count
;
1891 dbg_printk(MTIP_DRV_NAME
1892 " %s: Completion Status: stat %x, "
1893 "err %x, nsect %x\n",
1900 if (copy_to_user(user_buffer
,
1902 ATA_SECT_SIZE
* command
[3])) {
1904 goto exit_drive_command
;
1909 dmam_free_coherent(&port
->dd
->pdev
->dev
,
1910 ATA_SECT_SIZE
* xfer_sz
, buf
, dma_addr
);
1915 * Indicates whether a command has a single sector payload.
1917 * @command passed to the device to perform the certain event.
1918 * @features passed to the device to perform the certain event.
1921 * 1 command is one that always has a single sector payload,
1922 * regardless of the value in the Sector Count field.
1926 static unsigned int implicit_sector(unsigned char command
,
1927 unsigned char features
)
1929 unsigned int rv
= 0;
1931 /* list of commands that have an implicit sector count of 1 */
1933 case ATA_CMD_SEC_SET_PASS
:
1934 case ATA_CMD_SEC_UNLOCK
:
1935 case ATA_CMD_SEC_ERASE_PREP
:
1936 case ATA_CMD_SEC_ERASE_UNIT
:
1937 case ATA_CMD_SEC_FREEZE_LOCK
:
1938 case ATA_CMD_SEC_DISABLE_PASS
:
1939 case ATA_CMD_PMP_READ
:
1940 case ATA_CMD_PMP_WRITE
:
1943 case ATA_CMD_SET_MAX
:
1944 if (features
== ATA_SET_MAX_UNLOCK
)
1948 if ((features
== ATA_SMART_READ_VALUES
) ||
1949 (features
== ATA_SMART_READ_THRESHOLDS
))
1952 case ATA_CMD_CONF_OVERLAY
:
1953 if ((features
== ATA_DCO_IDENTIFY
) ||
1954 (features
== ATA_DCO_SET
))
1962 * Executes a taskfile
1963 * See ide_taskfile_ioctl() for derivation
1965 static int exec_drive_taskfile(struct driver_data
*dd
,
1967 ide_task_request_t
*req_task
,
1970 struct host_to_dev_fis fis
;
1971 struct host_to_dev_fis
*reply
;
1974 dma_addr_t outbuf_dma
= 0;
1975 dma_addr_t inbuf_dma
= 0;
1976 dma_addr_t dma_buffer
= 0;
1978 unsigned int taskin
= 0;
1979 unsigned int taskout
= 0;
1981 unsigned int timeout
;
1982 unsigned int force_single_sector
;
1983 unsigned int transfer_size
;
1984 unsigned long task_file_data
;
1985 int intotal
= outtotal
+ req_task
->out_size
;
1988 taskout
= req_task
->out_size
;
1989 taskin
= req_task
->in_size
;
1990 /* 130560 = 512 * 0xFF*/
1991 if (taskin
> 130560 || taskout
> 130560)
1995 outbuf
= memdup_user(buf
+ outtotal
, taskout
);
1997 return PTR_ERR(outbuf
);
1999 outbuf_dma
= pci_map_single(dd
->pdev
,
2003 if (pci_dma_mapping_error(dd
->pdev
, outbuf_dma
)) {
2007 dma_buffer
= outbuf_dma
;
2011 inbuf
= memdup_user(buf
+ intotal
, taskin
);
2012 if (IS_ERR(inbuf
)) {
2013 err
= PTR_ERR(inbuf
);
2017 inbuf_dma
= pci_map_single(dd
->pdev
,
2019 taskin
, DMA_FROM_DEVICE
);
2020 if (pci_dma_mapping_error(dd
->pdev
, inbuf_dma
)) {
2024 dma_buffer
= inbuf_dma
;
2027 /* only supports PIO and non-data commands from this ioctl. */
2028 switch (req_task
->data_phase
) {
2030 nsect
= taskout
/ ATA_SECT_SIZE
;
2031 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2034 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2036 case TASKFILE_NO_DATA
:
2037 reply
= (dd
->port
->rxfis
+ RX_FIS_D2H_REG
);
2044 /* Build the FIS. */
2045 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
2049 fis
.command
= req_task
->io_ports
[7];
2050 fis
.features
= req_task
->io_ports
[1];
2051 fis
.sect_count
= req_task
->io_ports
[2];
2052 fis
.lba_low
= req_task
->io_ports
[3];
2053 fis
.lba_mid
= req_task
->io_ports
[4];
2054 fis
.lba_hi
= req_task
->io_ports
[5];
2055 /* Clear the dev bit*/
2056 fis
.device
= req_task
->io_ports
[6] & ~0x10;
2058 if ((req_task
->in_flags
.all
== 0) && (req_task
->out_flags
.all
& 1)) {
2059 req_task
->in_flags
.all
=
2060 IDE_TASKFILE_STD_IN_FLAGS
|
2061 (IDE_HOB_STD_IN_FLAGS
<< 8);
2062 fis
.lba_low_ex
= req_task
->hob_ports
[3];
2063 fis
.lba_mid_ex
= req_task
->hob_ports
[4];
2064 fis
.lba_hi_ex
= req_task
->hob_ports
[5];
2065 fis
.features_ex
= req_task
->hob_ports
[1];
2066 fis
.sect_cnt_ex
= req_task
->hob_ports
[2];
2069 req_task
->in_flags
.all
= IDE_TASKFILE_STD_IN_FLAGS
;
2072 force_single_sector
= implicit_sector(fis
.command
, fis
.features
);
2074 if ((taskin
|| taskout
) && (!fis
.sect_count
)) {
2076 fis
.sect_count
= nsect
;
2078 if (!force_single_sector
) {
2079 dev_warn(&dd
->pdev
->dev
,
2080 "data movement but "
2081 "sect_count is 0\n");
2088 dbg_printk(MTIP_DRV_NAME
2089 " %s: cmd %x, feat %x, nsect %x,"
2090 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
2101 /* check for erase mode support during secure erase.*/
2102 if ((fis
.command
== ATA_CMD_SEC_ERASE_UNIT
) && outbuf
&&
2103 (outbuf
[0] & MTIP_SEC_ERASE_MODE
)) {
2107 mtip_set_timeout(dd
, &fis
, &timeout
, erasemode
);
2109 /* Determine the correct transfer size.*/
2110 if (force_single_sector
)
2111 transfer_size
= ATA_SECT_SIZE
;
2113 transfer_size
= ATA_SECT_SIZE
* fis
.sect_count
;
2115 /* Execute the command.*/
2116 if (mtip_exec_internal_command(dd
->port
,
2127 task_file_data
= readl(dd
->port
->mmio
+PORT_TFDATA
);
2129 if ((req_task
->data_phase
== TASKFILE_IN
) && !(task_file_data
& 1)) {
2130 reply
= dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
;
2131 req_task
->io_ports
[7] = reply
->control
;
2133 reply
= dd
->port
->rxfis
+ RX_FIS_D2H_REG
;
2134 req_task
->io_ports
[7] = reply
->command
;
2137 /* reclaim the DMA buffers.*/
2139 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2140 taskin
, DMA_FROM_DEVICE
);
2142 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2143 taskout
, DMA_TO_DEVICE
);
2147 /* return the ATA registers to the caller.*/
2148 req_task
->io_ports
[1] = reply
->features
;
2149 req_task
->io_ports
[2] = reply
->sect_count
;
2150 req_task
->io_ports
[3] = reply
->lba_low
;
2151 req_task
->io_ports
[4] = reply
->lba_mid
;
2152 req_task
->io_ports
[5] = reply
->lba_hi
;
2153 req_task
->io_ports
[6] = reply
->device
;
2155 if (req_task
->out_flags
.all
& 1) {
2157 req_task
->hob_ports
[3] = reply
->lba_low_ex
;
2158 req_task
->hob_ports
[4] = reply
->lba_mid_ex
;
2159 req_task
->hob_ports
[5] = reply
->lba_hi_ex
;
2160 req_task
->hob_ports
[1] = reply
->features_ex
;
2161 req_task
->hob_ports
[2] = reply
->sect_cnt_ex
;
2163 dbg_printk(MTIP_DRV_NAME
2164 " %s: Completion: stat %x,"
2165 "err %x, sect_cnt %x, lbalo %x,"
2166 "lbamid %x, lbahi %x, dev %x\n",
2168 req_task
->io_ports
[7],
2169 req_task
->io_ports
[1],
2170 req_task
->io_ports
[2],
2171 req_task
->io_ports
[3],
2172 req_task
->io_ports
[4],
2173 req_task
->io_ports
[5],
2174 req_task
->io_ports
[6]);
2177 if (copy_to_user(buf
+ outtotal
, outbuf
, taskout
)) {
2183 if (copy_to_user(buf
+ intotal
, inbuf
, taskin
)) {
2190 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2191 taskin
, DMA_FROM_DEVICE
);
2193 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2194 taskout
, DMA_TO_DEVICE
);
2202 * Handle IOCTL calls from the Block Layer.
2204 * This function is called by the Block Layer when it receives an IOCTL
2205 * command that it does not understand. If the IOCTL command is not supported
2206 * this function returns -ENOTTY.
2208 * @dd Pointer to the driver data structure.
2209 * @cmd IOCTL command passed from the Block Layer.
2210 * @arg IOCTL argument passed from the Block Layer.
2213 * 0 The IOCTL completed successfully.
2214 * -ENOTTY The specified command is not supported.
2215 * -EFAULT An error occurred copying data to a user space buffer.
2216 * -EIO An error occurred while executing the command.
2218 static int mtip_hw_ioctl(struct driver_data
*dd
, unsigned int cmd
,
2222 case HDIO_GET_IDENTITY
:
2224 if (copy_to_user((void __user
*)arg
, dd
->port
->identify
,
2225 sizeof(u16
) * ATA_ID_WORDS
))
2229 case HDIO_DRIVE_CMD
:
2231 u8 drive_command
[4];
2233 /* Copy the user command info to our buffer. */
2234 if (copy_from_user(drive_command
,
2235 (void __user
*) arg
,
2236 sizeof(drive_command
)))
2239 /* Execute the drive command. */
2240 if (exec_drive_command(dd
->port
,
2242 (void __user
*) (arg
+4)))
2245 /* Copy the status back to the users buffer. */
2246 if (copy_to_user((void __user
*) arg
,
2248 sizeof(drive_command
)))
2253 case HDIO_DRIVE_TASK
:
2255 u8 drive_command
[7];
2257 /* Copy the user command info to our buffer. */
2258 if (copy_from_user(drive_command
,
2259 (void __user
*) arg
,
2260 sizeof(drive_command
)))
2263 /* Execute the drive command. */
2264 if (exec_drive_task(dd
->port
, drive_command
))
2267 /* Copy the status back to the users buffer. */
2268 if (copy_to_user((void __user
*) arg
,
2270 sizeof(drive_command
)))
2275 case HDIO_DRIVE_TASKFILE
: {
2276 ide_task_request_t req_task
;
2279 if (copy_from_user(&req_task
, (void __user
*) arg
,
2283 outtotal
= sizeof(req_task
);
2285 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
2286 &req_task
, outtotal
);
2288 if (copy_to_user((void __user
*) arg
, &req_task
,
2302 * Submit an IO to the hw
2304 * This function is called by the block layer to issue an io
2305 * to the device. Upon completion, the callback function will
2306 * be called with the data parameter passed as the callback data.
2308 * @dd Pointer to the driver data structure.
2309 * @start First sector to read.
2310 * @nsect Number of sectors to read.
2311 * @nents Number of entries in scatter list for the read command.
2312 * @tag The tag of this read command.
2313 * @callback Pointer to the function that should be called
2314 * when the read completes.
2315 * @data Callback data passed to the callback function
2316 * when the read completes.
2317 * @dir Direction (read or write)
2322 static void mtip_hw_submit_io(struct driver_data
*dd
, struct request
*rq
,
2323 struct mtip_cmd
*command
, int nents
,
2324 struct blk_mq_hw_ctx
*hctx
)
2326 struct host_to_dev_fis
*fis
;
2327 struct mtip_port
*port
= dd
->port
;
2328 int dma_dir
= rq_data_dir(rq
) == READ
? DMA_FROM_DEVICE
: DMA_TO_DEVICE
;
2329 u64 start
= blk_rq_pos(rq
);
2330 unsigned int nsect
= blk_rq_sectors(rq
);
2332 /* Map the scatter list for DMA access */
2333 nents
= dma_map_sg(&dd
->pdev
->dev
, command
->sg
, nents
, dma_dir
);
2335 prefetch(&port
->flags
);
2337 command
->scatter_ents
= nents
;
2340 * The number of retries for this command before it is
2341 * reported as a failure to the upper layers.
2343 command
->retries
= MTIP_MAX_RETRIES
;
2346 fis
= command
->command
;
2349 if (dma_dir
== DMA_FROM_DEVICE
)
2350 fis
->command
= ATA_CMD_FPDMA_READ
;
2352 fis
->command
= ATA_CMD_FPDMA_WRITE
;
2353 fis
->lba_low
= start
& 0xFF;
2354 fis
->lba_mid
= (start
>> 8) & 0xFF;
2355 fis
->lba_hi
= (start
>> 16) & 0xFF;
2356 fis
->lba_low_ex
= (start
>> 24) & 0xFF;
2357 fis
->lba_mid_ex
= (start
>> 32) & 0xFF;
2358 fis
->lba_hi_ex
= (start
>> 40) & 0xFF;
2359 fis
->device
= 1 << 6;
2360 fis
->features
= nsect
& 0xFF;
2361 fis
->features_ex
= (nsect
>> 8) & 0xFF;
2362 fis
->sect_count
= ((rq
->tag
<< 3) | (rq
->tag
>> 5));
2363 fis
->sect_cnt_ex
= 0;
2367 fill_command_sg(dd
, command
, nents
);
2369 if (unlikely(command
->unaligned
))
2370 fis
->device
|= 1 << 7;
2372 /* Populate the command header */
2373 command
->command_header
->opts
=
2374 __force_bit2int
cpu_to_le32(
2375 (nents
<< 16) | 5 | AHCI_CMD_PREFETCH
);
2376 command
->command_header
->byte_count
= 0;
2379 * Set the completion function and data for the command
2380 * within this layer.
2382 command
->comp_data
= dd
;
2383 command
->comp_func
= mtip_async_complete
;
2384 command
->direction
= dma_dir
;
2387 * To prevent this command from being issued
2388 * if an internal command is in progress or error handling is active.
2390 if (unlikely(port
->flags
& MTIP_PF_PAUSE_IO
)) {
2391 set_bit(rq
->tag
, port
->cmds_to_issue
);
2392 set_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2396 /* Issue the command to the hardware */
2397 mtip_issue_ncq_command(port
, rq
->tag
);
2401 * Sysfs status dump.
2403 * @dev Pointer to the device structure, passed by the kernrel.
2404 * @attr Pointer to the device_attribute structure passed by the kernel.
2405 * @buf Pointer to the char buffer that will receive the stats info.
2408 * The size, in bytes, of the data copied into buf.
2410 static ssize_t
mtip_hw_show_status(struct device
*dev
,
2411 struct device_attribute
*attr
,
2414 struct driver_data
*dd
= dev_to_disk(dev
)->private_data
;
2417 if (test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))
2418 size
+= sprintf(buf
, "%s", "thermal_shutdown\n");
2419 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
))
2420 size
+= sprintf(buf
, "%s", "write_protect\n");
2422 size
+= sprintf(buf
, "%s", "online\n");
2427 static DEVICE_ATTR(status
, S_IRUGO
, mtip_hw_show_status
, NULL
);
2429 /* debugsfs entries */
2431 static ssize_t
show_device_status(struct device_driver
*drv
, char *buf
)
2434 struct driver_data
*dd
, *tmp
;
2435 unsigned long flags
;
2439 spin_lock_irqsave(&dev_lock
, flags
);
2440 size
+= sprintf(&buf
[size
], "Devices Present:\n");
2441 list_for_each_entry_safe(dd
, tmp
, &online_list
, online_list
) {
2444 dd
->port
->identify
&&
2445 dd
->port
->identify_valid
) {
2447 (char *) (dd
->port
->identify
+ 10), 21);
2448 status
= *(dd
->port
->identify
+ 141);
2450 memset(id_buf
, 0, 42);
2455 test_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
)) {
2456 size
+= sprintf(&buf
[size
],
2457 " device %s %s (ftl rebuild %d %%)\n",
2458 dev_name(&dd
->pdev
->dev
),
2462 size
+= sprintf(&buf
[size
],
2464 dev_name(&dd
->pdev
->dev
),
2470 size
+= sprintf(&buf
[size
], "Devices Being Removed:\n");
2471 list_for_each_entry_safe(dd
, tmp
, &removing_list
, remove_list
) {
2474 dd
->port
->identify
&&
2475 dd
->port
->identify_valid
) {
2477 (char *) (dd
->port
->identify
+10), 21);
2478 status
= *(dd
->port
->identify
+ 141);
2480 memset(id_buf
, 0, 42);
2485 test_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
)) {
2486 size
+= sprintf(&buf
[size
],
2487 " device %s %s (ftl rebuild %d %%)\n",
2488 dev_name(&dd
->pdev
->dev
),
2492 size
+= sprintf(&buf
[size
],
2494 dev_name(&dd
->pdev
->dev
),
2499 spin_unlock_irqrestore(&dev_lock
, flags
);
2504 static ssize_t
mtip_hw_read_device_status(struct file
*f
, char __user
*ubuf
,
2505 size_t len
, loff_t
*offset
)
2507 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2512 if (!len
|| *offset
)
2515 buf
= kzalloc(MTIP_DFS_MAX_BUF_SIZE
, GFP_KERNEL
);
2517 dev_err(&dd
->pdev
->dev
,
2518 "Memory allocation: status buffer\n");
2522 size
+= show_device_status(NULL
, buf
);
2524 *offset
= size
<= len
? size
: len
;
2525 size
= copy_to_user(ubuf
, buf
, *offset
);
2530 return rv
? rv
: *offset
;
2533 static ssize_t
mtip_hw_read_registers(struct file
*f
, char __user
*ubuf
,
2534 size_t len
, loff_t
*offset
)
2536 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2538 u32 group_allocated
;
2545 buf
= kzalloc(MTIP_DFS_MAX_BUF_SIZE
, GFP_KERNEL
);
2547 dev_err(&dd
->pdev
->dev
,
2548 "Memory allocation: register buffer\n");
2552 size
+= sprintf(&buf
[size
], "H/ S ACTive : [ 0x");
2554 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2555 size
+= sprintf(&buf
[size
], "%08X ",
2556 readl(dd
->port
->s_active
[n
]));
2558 size
+= sprintf(&buf
[size
], "]\n");
2559 size
+= sprintf(&buf
[size
], "H/ Command Issue : [ 0x");
2561 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2562 size
+= sprintf(&buf
[size
], "%08X ",
2563 readl(dd
->port
->cmd_issue
[n
]));
2565 size
+= sprintf(&buf
[size
], "]\n");
2566 size
+= sprintf(&buf
[size
], "H/ Completed : [ 0x");
2568 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2569 size
+= sprintf(&buf
[size
], "%08X ",
2570 readl(dd
->port
->completed
[n
]));
2572 size
+= sprintf(&buf
[size
], "]\n");
2573 size
+= sprintf(&buf
[size
], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
2574 readl(dd
->port
->mmio
+ PORT_IRQ_STAT
));
2575 size
+= sprintf(&buf
[size
], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
2576 readl(dd
->mmio
+ HOST_IRQ_STAT
));
2577 size
+= sprintf(&buf
[size
], "\n");
2579 size
+= sprintf(&buf
[size
], "L/ Commands in Q : [ 0x");
2581 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2582 if (sizeof(long) > sizeof(u32
))
2584 dd
->port
->cmds_to_issue
[n
/2] >> (32*(n
&1));
2586 group_allocated
= dd
->port
->cmds_to_issue
[n
];
2587 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2589 size
+= sprintf(&buf
[size
], "]\n");
2591 *offset
= size
<= len
? size
: len
;
2592 size
= copy_to_user(ubuf
, buf
, *offset
);
2597 return rv
? rv
: *offset
;
2600 static ssize_t
mtip_hw_read_flags(struct file
*f
, char __user
*ubuf
,
2601 size_t len
, loff_t
*offset
)
2603 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2611 buf
= kzalloc(MTIP_DFS_MAX_BUF_SIZE
, GFP_KERNEL
);
2613 dev_err(&dd
->pdev
->dev
,
2614 "Memory allocation: flag buffer\n");
2618 size
+= sprintf(&buf
[size
], "Flag-port : [ %08lX ]\n",
2620 size
+= sprintf(&buf
[size
], "Flag-dd : [ %08lX ]\n",
2623 *offset
= size
<= len
? size
: len
;
2624 size
= copy_to_user(ubuf
, buf
, *offset
);
2629 return rv
? rv
: *offset
;
2632 static const struct file_operations mtip_device_status_fops
= {
2633 .owner
= THIS_MODULE
,
2634 .open
= simple_open
,
2635 .read
= mtip_hw_read_device_status
,
2636 .llseek
= no_llseek
,
2639 static const struct file_operations mtip_regs_fops
= {
2640 .owner
= THIS_MODULE
,
2641 .open
= simple_open
,
2642 .read
= mtip_hw_read_registers
,
2643 .llseek
= no_llseek
,
2646 static const struct file_operations mtip_flags_fops
= {
2647 .owner
= THIS_MODULE
,
2648 .open
= simple_open
,
2649 .read
= mtip_hw_read_flags
,
2650 .llseek
= no_llseek
,
2654 * Create the sysfs related attributes.
2656 * @dd Pointer to the driver data structure.
2657 * @kobj Pointer to the kobj for the block device.
2660 * 0 Operation completed successfully.
2661 * -EINVAL Invalid parameter.
2663 static int mtip_hw_sysfs_init(struct driver_data
*dd
, struct kobject
*kobj
)
2668 if (sysfs_create_file(kobj
, &dev_attr_status
.attr
))
2669 dev_warn(&dd
->pdev
->dev
,
2670 "Error creating 'status' sysfs entry\n");
2675 * Remove the sysfs related attributes.
2677 * @dd Pointer to the driver data structure.
2678 * @kobj Pointer to the kobj for the block device.
2681 * 0 Operation completed successfully.
2682 * -EINVAL Invalid parameter.
2684 static int mtip_hw_sysfs_exit(struct driver_data
*dd
, struct kobject
*kobj
)
2689 sysfs_remove_file(kobj
, &dev_attr_status
.attr
);
2694 static int mtip_hw_debugfs_init(struct driver_data
*dd
)
2699 dd
->dfs_node
= debugfs_create_dir(dd
->disk
->disk_name
, dfs_parent
);
2700 if (IS_ERR_OR_NULL(dd
->dfs_node
)) {
2701 dev_warn(&dd
->pdev
->dev
,
2702 "Error creating node %s under debugfs\n",
2703 dd
->disk
->disk_name
);
2704 dd
->dfs_node
= NULL
;
2708 debugfs_create_file("flags", S_IRUGO
, dd
->dfs_node
, dd
,
2710 debugfs_create_file("registers", S_IRUGO
, dd
->dfs_node
, dd
,
2716 static void mtip_hw_debugfs_exit(struct driver_data
*dd
)
2719 debugfs_remove_recursive(dd
->dfs_node
);
2723 * Perform any init/resume time hardware setup
2725 * @dd Pointer to the driver data structure.
2730 static inline void hba_setup(struct driver_data
*dd
)
2733 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2735 /* interrupt bug workaround: use only 1 IS bit.*/
2737 HSORG_DISABLE_SLOTGRP_INTR
|
2738 HSORG_DISABLE_SLOTGRP_PXIS
,
2739 dd
->mmio
+ HOST_HSORG
);
2742 static int mtip_device_unaligned_constrained(struct driver_data
*dd
)
2744 return (dd
->pdev
->device
== P420M_DEVICE_ID
? 1 : 0);
2748 * Detect the details of the product, and store anything needed
2749 * into the driver data structure. This includes product type and
2750 * version and number of slot groups.
2752 * @dd Pointer to the driver data structure.
2757 static void mtip_detect_product(struct driver_data
*dd
)
2760 unsigned int rev
, slotgroups
;
2763 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
2765 * [15:8] hardware/software interface rev#
2766 * [ 3] asic-style interface
2767 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
2769 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2771 dd
->product_type
= MTIP_PRODUCT_UNKNOWN
;
2772 dd
->slot_groups
= 1;
2775 dd
->product_type
= MTIP_PRODUCT_ASICFPGA
;
2776 rev
= (hwdata
& HSORG_HWREV
) >> 8;
2777 slotgroups
= (hwdata
& HSORG_SLOTGROUPS
) + 1;
2778 dev_info(&dd
->pdev
->dev
,
2779 "ASIC-FPGA design, HS rev 0x%x, "
2780 "%i slot groups [%i slots]\n",
2785 if (slotgroups
> MTIP_MAX_SLOT_GROUPS
) {
2786 dev_warn(&dd
->pdev
->dev
,
2787 "Warning: driver only supports "
2788 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS
);
2789 slotgroups
= MTIP_MAX_SLOT_GROUPS
;
2791 dd
->slot_groups
= slotgroups
;
2795 dev_warn(&dd
->pdev
->dev
, "Unrecognized product id\n");
2799 * Blocking wait for FTL rebuild to complete
2801 * @dd Pointer to the DRIVER_DATA structure.
2804 * 0 FTL rebuild completed successfully
2805 * -EFAULT FTL rebuild error/timeout/interruption
2807 static int mtip_ftl_rebuild_poll(struct driver_data
*dd
)
2809 unsigned long timeout
, cnt
= 0, start
;
2811 dev_warn(&dd
->pdev
->dev
,
2812 "FTL rebuild in progress. Polling for completion.\n");
2815 timeout
= jiffies
+ msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS
);
2818 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
2821 if (mtip_check_surprise_removal(dd
->pdev
))
2824 if (mtip_get_identify(dd
->port
, NULL
) < 0)
2827 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
2828 MTIP_FTL_REBUILD_MAGIC
) {
2830 /* Print message every 3 minutes */
2832 dev_warn(&dd
->pdev
->dev
,
2833 "FTL rebuild in progress (%d secs).\n",
2834 jiffies_to_msecs(jiffies
- start
) / 1000);
2838 dev_warn(&dd
->pdev
->dev
,
2839 "FTL rebuild complete (%d secs).\n",
2840 jiffies_to_msecs(jiffies
- start
) / 1000);
2841 mtip_block_initialize(dd
);
2844 } while (time_before(jiffies
, timeout
));
2846 /* Check for timeout */
2847 dev_err(&dd
->pdev
->dev
,
2848 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
2849 jiffies_to_msecs(jiffies
- start
) / 1000);
2853 static void mtip_softirq_done_fn(struct request
*rq
)
2855 struct mtip_cmd
*cmd
= blk_mq_rq_to_pdu(rq
);
2856 struct driver_data
*dd
= rq
->q
->queuedata
;
2858 /* Unmap the DMA scatter list entries */
2859 dma_unmap_sg(&dd
->pdev
->dev
, cmd
->sg
, cmd
->scatter_ents
,
2862 if (unlikely(cmd
->unaligned
))
2863 up(&dd
->port
->cmd_slot_unal
);
2865 blk_mq_end_request(rq
, cmd
->status
);
2868 static void mtip_abort_cmd(struct request
*req
, void *data
,
2871 struct mtip_cmd
*cmd
= blk_mq_rq_to_pdu(req
);
2872 struct driver_data
*dd
= data
;
2874 dbg_printk(MTIP_DRV_NAME
" Aborting request, tag = %d\n", req
->tag
);
2876 clear_bit(req
->tag
, dd
->port
->cmds_to_issue
);
2878 mtip_softirq_done_fn(req
);
2881 static void mtip_queue_cmd(struct request
*req
, void *data
,
2884 struct driver_data
*dd
= data
;
2886 set_bit(req
->tag
, dd
->port
->cmds_to_issue
);
2887 blk_abort_request(req
);
2891 * service thread to issue queued commands
2893 * @data Pointer to the driver data structure.
2899 static int mtip_service_thread(void *data
)
2901 struct driver_data
*dd
= (struct driver_data
*)data
;
2902 unsigned long slot
, slot_start
, slot_wrap
, to
;
2903 unsigned int num_cmd_slots
= dd
->slot_groups
* 32;
2904 struct mtip_port
*port
= dd
->port
;
2907 if (kthread_should_stop() ||
2908 test_bit(MTIP_PF_SVC_THD_STOP_BIT
, &port
->flags
))
2910 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
2913 * the condition is to check neither an internal command is
2914 * is in progress nor error handling is active
2916 wait_event_interruptible(port
->svc_wait
, (port
->flags
) &&
2917 (port
->flags
& MTIP_PF_SVC_THD_WORK
));
2919 if (kthread_should_stop() ||
2920 test_bit(MTIP_PF_SVC_THD_STOP_BIT
, &port
->flags
))
2923 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
2927 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
2930 /* Demux bits: start with error handling */
2931 if (test_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
)) {
2932 mtip_handle_tfe(dd
);
2933 clear_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
2936 if (test_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
))
2939 if (test_bit(MTIP_PF_TO_ACTIVE_BIT
, &port
->flags
)) {
2940 to
= jiffies
+ msecs_to_jiffies(5000);
2944 } while (atomic_read(&dd
->irq_workers_active
) != 0 &&
2945 time_before(jiffies
, to
));
2947 if (atomic_read(&dd
->irq_workers_active
) != 0)
2948 dev_warn(&dd
->pdev
->dev
,
2949 "Completion workers still active!");
2951 spin_lock(dd
->queue
->queue_lock
);
2952 blk_mq_tagset_busy_iter(&dd
->tags
,
2953 mtip_queue_cmd
, dd
);
2954 spin_unlock(dd
->queue
->queue_lock
);
2956 set_bit(MTIP_PF_ISSUE_CMDS_BIT
, &dd
->port
->flags
);
2958 if (mtip_device_reset(dd
))
2959 blk_mq_tagset_busy_iter(&dd
->tags
,
2960 mtip_abort_cmd
, dd
);
2962 clear_bit(MTIP_PF_TO_ACTIVE_BIT
, &dd
->port
->flags
);
2965 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
2967 /* used to restrict the loop to one iteration */
2968 slot_start
= num_cmd_slots
;
2971 slot
= find_next_bit(port
->cmds_to_issue
,
2972 num_cmd_slots
, slot
);
2973 if (slot_wrap
== 1) {
2974 if ((slot_start
>= slot
) ||
2975 (slot
>= num_cmd_slots
))
2978 if (unlikely(slot_start
== num_cmd_slots
))
2981 if (unlikely(slot
== num_cmd_slots
)) {
2987 /* Issue the command to the hardware */
2988 mtip_issue_ncq_command(port
, slot
);
2990 clear_bit(slot
, port
->cmds_to_issue
);
2993 clear_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2996 if (test_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
)) {
2997 if (mtip_ftl_rebuild_poll(dd
) == 0)
2998 clear_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
);
3007 * DMA region teardown
3009 * @dd Pointer to driver_data structure
3014 static void mtip_dma_free(struct driver_data
*dd
)
3016 struct mtip_port
*port
= dd
->port
;
3019 dmam_free_coherent(&dd
->pdev
->dev
, BLOCK_DMA_ALLOC_SZ
,
3020 port
->block1
, port
->block1_dma
);
3022 if (port
->command_list
) {
3023 dmam_free_coherent(&dd
->pdev
->dev
, AHCI_CMD_TBL_SZ
,
3024 port
->command_list
, port
->command_list_dma
);
3031 * @dd Pointer to driver_data structure
3034 * -ENOMEM Not enough free DMA region space to initialize driver
3036 static int mtip_dma_alloc(struct driver_data
*dd
)
3038 struct mtip_port
*port
= dd
->port
;
3040 /* Allocate dma memory for RX Fis, Identify, and Sector Bufffer */
3042 dmam_alloc_coherent(&dd
->pdev
->dev
, BLOCK_DMA_ALLOC_SZ
,
3043 &port
->block1_dma
, GFP_KERNEL
);
3046 memset(port
->block1
, 0, BLOCK_DMA_ALLOC_SZ
);
3048 /* Allocate dma memory for command list */
3049 port
->command_list
=
3050 dmam_alloc_coherent(&dd
->pdev
->dev
, AHCI_CMD_TBL_SZ
,
3051 &port
->command_list_dma
, GFP_KERNEL
);
3052 if (!port
->command_list
) {
3053 dmam_free_coherent(&dd
->pdev
->dev
, BLOCK_DMA_ALLOC_SZ
,
3054 port
->block1
, port
->block1_dma
);
3055 port
->block1
= NULL
;
3056 port
->block1_dma
= 0;
3059 memset(port
->command_list
, 0, AHCI_CMD_TBL_SZ
);
3061 /* Setup all pointers into first DMA region */
3062 port
->rxfis
= port
->block1
+ AHCI_RX_FIS_OFFSET
;
3063 port
->rxfis_dma
= port
->block1_dma
+ AHCI_RX_FIS_OFFSET
;
3064 port
->identify
= port
->block1
+ AHCI_IDFY_OFFSET
;
3065 port
->identify_dma
= port
->block1_dma
+ AHCI_IDFY_OFFSET
;
3066 port
->log_buf
= port
->block1
+ AHCI_SECTBUF_OFFSET
;
3067 port
->log_buf_dma
= port
->block1_dma
+ AHCI_SECTBUF_OFFSET
;
3068 port
->smart_buf
= port
->block1
+ AHCI_SMARTBUF_OFFSET
;
3069 port
->smart_buf_dma
= port
->block1_dma
+ AHCI_SMARTBUF_OFFSET
;
3074 static int mtip_hw_get_identify(struct driver_data
*dd
)
3076 struct smart_attr attr242
;
3080 if (mtip_get_identify(dd
->port
, NULL
) < 0)
3083 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
3084 MTIP_FTL_REBUILD_MAGIC
) {
3085 set_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
);
3086 return MTIP_FTL_REBUILD_MAGIC
;
3088 mtip_dump_identify(dd
->port
);
3090 /* check write protect, over temp and rebuild statuses */
3091 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
3093 dd
->port
->log_buf_dma
, 1);
3095 dev_warn(&dd
->pdev
->dev
,
3096 "Error in READ LOG EXT (10h) command\n");
3097 /* non-critical error, don't fail the load */
3099 buf
= (unsigned char *)dd
->port
->log_buf
;
3100 if (buf
[259] & 0x1) {
3101 dev_info(&dd
->pdev
->dev
,
3102 "Write protect bit is set.\n");
3103 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
3105 if (buf
[288] == 0xF7) {
3106 dev_info(&dd
->pdev
->dev
,
3107 "Exceeded Tmax, drive in thermal shutdown.\n");
3108 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
3110 if (buf
[288] == 0xBF) {
3111 dev_info(&dd
->pdev
->dev
,
3112 "Drive indicates rebuild has failed.\n");
3113 set_bit(MTIP_DDF_REBUILD_FAILED_BIT
, &dd
->dd_flag
);
3117 /* get write protect progess */
3118 memset(&attr242
, 0, sizeof(struct smart_attr
));
3119 if (mtip_get_smart_attr(dd
->port
, 242, &attr242
))
3120 dev_warn(&dd
->pdev
->dev
,
3121 "Unable to check write protect progress\n");
3123 dev_info(&dd
->pdev
->dev
,
3124 "Write protect progress: %u%% (%u blocks)\n",
3125 attr242
.cur
, le32_to_cpu(attr242
.data
));
3131 * Called once for each card.
3133 * @dd Pointer to the driver data structure.
3136 * 0 on success, else an error code.
3138 static int mtip_hw_init(struct driver_data
*dd
)
3142 unsigned int num_command_slots
;
3143 unsigned long timeout
, timetaken
;
3145 dd
->mmio
= pcim_iomap_table(dd
->pdev
)[MTIP_ABAR
];
3147 mtip_detect_product(dd
);
3148 if (dd
->product_type
== MTIP_PRODUCT_UNKNOWN
) {
3152 num_command_slots
= dd
->slot_groups
* 32;
3156 dd
->port
= kzalloc_node(sizeof(struct mtip_port
), GFP_KERNEL
,
3159 dev_err(&dd
->pdev
->dev
,
3160 "Memory allocation: port structure\n");
3164 /* Continue workqueue setup */
3165 for (i
= 0; i
< MTIP_MAX_SLOT_GROUPS
; i
++)
3166 dd
->work
[i
].port
= dd
->port
;
3168 /* Enable unaligned IO constraints for some devices */
3169 if (mtip_device_unaligned_constrained(dd
))
3170 dd
->unal_qdepth
= MTIP_MAX_UNALIGNED_SLOTS
;
3172 dd
->unal_qdepth
= 0;
3174 sema_init(&dd
->port
->cmd_slot_unal
, dd
->unal_qdepth
);
3176 /* Spinlock to prevent concurrent issue */
3177 for (i
= 0; i
< MTIP_MAX_SLOT_GROUPS
; i
++)
3178 spin_lock_init(&dd
->port
->cmd_issue_lock
[i
]);
3180 /* Set the port mmio base address. */
3181 dd
->port
->mmio
= dd
->mmio
+ PORT_OFFSET
;
3184 /* DMA allocations */
3185 rv
= mtip_dma_alloc(dd
);
3189 /* Setup the pointers to the extended s_active and CI registers. */
3190 for (i
= 0; i
< dd
->slot_groups
; i
++) {
3191 dd
->port
->s_active
[i
] =
3192 dd
->port
->mmio
+ i
*0x80 + PORT_SCR_ACT
;
3193 dd
->port
->cmd_issue
[i
] =
3194 dd
->port
->mmio
+ i
*0x80 + PORT_COMMAND_ISSUE
;
3195 dd
->port
->completed
[i
] =
3196 dd
->port
->mmio
+ i
*0x80 + PORT_SDBV
;
3199 timetaken
= jiffies
;
3200 timeout
= jiffies
+ msecs_to_jiffies(30000);
3201 while (((readl(dd
->port
->mmio
+ PORT_SCR_STAT
) & 0x0F) != 0x03) &&
3202 time_before(jiffies
, timeout
)) {
3205 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
3206 timetaken
= jiffies
- timetaken
;
3207 dev_warn(&dd
->pdev
->dev
,
3208 "Surprise removal detected at %u ms\n",
3209 jiffies_to_msecs(timetaken
));
3213 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
3214 timetaken
= jiffies
- timetaken
;
3215 dev_warn(&dd
->pdev
->dev
,
3216 "Removal detected at %u ms\n",
3217 jiffies_to_msecs(timetaken
));
3222 /* Conditionally reset the HBA. */
3223 if (!(readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_NZDMA
)) {
3224 if (mtip_hba_reset(dd
) < 0) {
3225 dev_err(&dd
->pdev
->dev
,
3226 "Card did not reset within timeout\n");
3231 /* Clear any pending interrupts on the HBA */
3232 writel(readl(dd
->mmio
+ HOST_IRQ_STAT
),
3233 dd
->mmio
+ HOST_IRQ_STAT
);
3236 mtip_init_port(dd
->port
);
3237 mtip_start_port(dd
->port
);
3239 /* Setup the ISR and enable interrupts. */
3240 rv
= devm_request_irq(&dd
->pdev
->dev
,
3244 dev_driver_string(&dd
->pdev
->dev
),
3248 dev_err(&dd
->pdev
->dev
,
3249 "Unable to allocate IRQ %d\n", dd
->pdev
->irq
);
3252 irq_set_affinity_hint(dd
->pdev
->irq
, get_cpu_mask(dd
->isr_binding
));
3254 /* Enable interrupts on the HBA. */
3255 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3256 dd
->mmio
+ HOST_CTL
);
3258 init_waitqueue_head(&dd
->port
->svc_wait
);
3260 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)) {
3268 /* Disable interrupts on the HBA. */
3269 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3270 dd
->mmio
+ HOST_CTL
);
3272 /* Release the IRQ. */
3273 irq_set_affinity_hint(dd
->pdev
->irq
, NULL
);
3274 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3277 mtip_deinit_port(dd
->port
);
3281 /* Free the memory allocated for the for structure. */
3287 static int mtip_standby_drive(struct driver_data
*dd
)
3291 if (dd
->sr
|| !dd
->port
)
3294 * Send standby immediate (E0h) to the drive so that it
3297 if (!test_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
) &&
3298 !test_bit(MTIP_DDF_REBUILD_FAILED_BIT
, &dd
->dd_flag
) &&
3299 !test_bit(MTIP_DDF_SEC_LOCK_BIT
, &dd
->dd_flag
)) {
3300 rv
= mtip_standby_immediate(dd
->port
);
3302 dev_warn(&dd
->pdev
->dev
,
3303 "STANDBY IMMEDIATE failed\n");
3309 * Called to deinitialize an interface.
3311 * @dd Pointer to the driver data structure.
3316 static int mtip_hw_exit(struct driver_data
*dd
)
3319 /* de-initialize the port. */
3320 mtip_deinit_port(dd
->port
);
3322 /* Disable interrupts on the HBA. */
3323 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3324 dd
->mmio
+ HOST_CTL
);
3327 /* Release the IRQ. */
3328 irq_set_affinity_hint(dd
->pdev
->irq
, NULL
);
3329 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3332 /* Free dma regions */
3335 /* Free the memory allocated for the for structure. */
3343 * Issue a Standby Immediate command to the device.
3345 * This function is called by the Block Layer just before the
3346 * system powers off during a shutdown.
3348 * @dd Pointer to the driver data structure.
3353 static int mtip_hw_shutdown(struct driver_data
*dd
)
3356 * Send standby immediate (E0h) to the drive so that it
3359 mtip_standby_drive(dd
);
3367 * This function is called by the Block Layer just before the
3368 * system hibernates.
3370 * @dd Pointer to the driver data structure.
3373 * 0 Suspend was successful
3374 * -EFAULT Suspend was not successful
3376 static int mtip_hw_suspend(struct driver_data
*dd
)
3379 * Send standby immediate (E0h) to the drive
3380 * so that it saves its state.
3382 if (mtip_standby_drive(dd
) != 0) {
3383 dev_err(&dd
->pdev
->dev
,
3384 "Failed standby-immediate command\n");
3388 /* Disable interrupts on the HBA.*/
3389 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3390 dd
->mmio
+ HOST_CTL
);
3391 mtip_deinit_port(dd
->port
);
3399 * This function is called by the Block Layer as the
3402 * @dd Pointer to the driver data structure.
3405 * 0 Resume was successful
3406 * -EFAULT Resume was not successful
3408 static int mtip_hw_resume(struct driver_data
*dd
)
3410 /* Perform any needed hardware setup steps */
3414 if (mtip_hba_reset(dd
) != 0) {
3415 dev_err(&dd
->pdev
->dev
,
3416 "Unable to reset the HBA\n");
3421 * Enable the port, DMA engine, and FIS reception specific
3422 * h/w in controller.
3424 mtip_init_port(dd
->port
);
3425 mtip_start_port(dd
->port
);
3427 /* Enable interrupts on the HBA.*/
3428 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3429 dd
->mmio
+ HOST_CTL
);
3435 * Helper function for reusing disk name
3436 * upon hot insertion.
3438 static int rssd_disk_name_format(char *prefix
,
3443 const int base
= 'z' - 'a' + 1;
3444 char *begin
= buf
+ strlen(prefix
);
3445 char *end
= buf
+ buflen
;
3455 *--p
= 'a' + (index
% unit
);
3456 index
= (index
/ unit
) - 1;
3457 } while (index
>= 0);
3459 memmove(begin
, p
, end
- p
);
3460 memcpy(buf
, prefix
, strlen(prefix
));
3466 * Block layer IOCTL handler.
3468 * @dev Pointer to the block_device structure.
3470 * @cmd IOCTL command passed from the user application.
3471 * @arg Argument passed from the user application.
3474 * 0 IOCTL completed successfully.
3475 * -ENOTTY IOCTL not supported or invalid driver data
3476 * structure pointer.
3478 static int mtip_block_ioctl(struct block_device
*dev
,
3483 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3485 if (!capable(CAP_SYS_ADMIN
))
3491 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3498 return mtip_hw_ioctl(dd
, cmd
, arg
);
3502 #ifdef CONFIG_COMPAT
3504 * Block layer compat IOCTL handler.
3506 * @dev Pointer to the block_device structure.
3508 * @cmd IOCTL command passed from the user application.
3509 * @arg Argument passed from the user application.
3512 * 0 IOCTL completed successfully.
3513 * -ENOTTY IOCTL not supported or invalid driver data
3514 * structure pointer.
3516 static int mtip_block_compat_ioctl(struct block_device
*dev
,
3521 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3523 if (!capable(CAP_SYS_ADMIN
))
3529 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3535 case HDIO_DRIVE_TASKFILE
: {
3536 struct mtip_compat_ide_task_request_s __user
*compat_req_task
;
3537 ide_task_request_t req_task
;
3538 int compat_tasksize
, outtotal
, ret
;
3541 sizeof(struct mtip_compat_ide_task_request_s
);
3544 (struct mtip_compat_ide_task_request_s __user
*) arg
;
3546 if (copy_from_user(&req_task
, (void __user
*) arg
,
3547 compat_tasksize
- (2 * sizeof(compat_long_t
))))
3550 if (get_user(req_task
.out_size
, &compat_req_task
->out_size
))
3553 if (get_user(req_task
.in_size
, &compat_req_task
->in_size
))
3556 outtotal
= sizeof(struct mtip_compat_ide_task_request_s
);
3558 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
3559 &req_task
, outtotal
);
3561 if (copy_to_user((void __user
*) arg
, &req_task
,
3563 (2 * sizeof(compat_long_t
))))
3566 if (put_user(req_task
.out_size
, &compat_req_task
->out_size
))
3569 if (put_user(req_task
.in_size
, &compat_req_task
->in_size
))
3575 return mtip_hw_ioctl(dd
, cmd
, arg
);
3581 * Obtain the geometry of the device.
3583 * You may think that this function is obsolete, but some applications,
3584 * fdisk for example still used CHS values. This function describes the
3585 * device as having 224 heads and 56 sectors per cylinder. These values are
3586 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
3587 * partition is described in terms of a start and end cylinder this means
3588 * that each partition is also 4KB aligned. Non-aligned partitions adversely
3589 * affects performance.
3591 * @dev Pointer to the block_device strucutre.
3592 * @geo Pointer to a hd_geometry structure.
3595 * 0 Operation completed successfully.
3596 * -ENOTTY An error occurred while reading the drive capacity.
3598 static int mtip_block_getgeo(struct block_device
*dev
,
3599 struct hd_geometry
*geo
)
3601 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3607 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3608 dev_warn(&dd
->pdev
->dev
,
3609 "Could not get drive capacity.\n");
3615 sector_div(capacity
, (geo
->heads
* geo
->sectors
));
3616 geo
->cylinders
= capacity
;
3620 static int mtip_block_open(struct block_device
*dev
, fmode_t mode
)
3622 struct driver_data
*dd
;
3624 if (dev
&& dev
->bd_disk
) {
3625 dd
= (struct driver_data
*) dev
->bd_disk
->private_data
;
3628 if (test_bit(MTIP_DDF_REMOVAL_BIT
,
3638 static void mtip_block_release(struct gendisk
*disk
, fmode_t mode
)
3643 * Block device operation function.
3645 * This structure contains pointers to the functions required by the block
3648 static const struct block_device_operations mtip_block_ops
= {
3649 .open
= mtip_block_open
,
3650 .release
= mtip_block_release
,
3651 .ioctl
= mtip_block_ioctl
,
3652 #ifdef CONFIG_COMPAT
3653 .compat_ioctl
= mtip_block_compat_ioctl
,
3655 .getgeo
= mtip_block_getgeo
,
3656 .owner
= THIS_MODULE
3659 static inline bool is_se_active(struct driver_data
*dd
)
3661 if (unlikely(test_bit(MTIP_PF_SE_ACTIVE_BIT
, &dd
->port
->flags
))) {
3662 if (dd
->port
->ic_pause_timer
) {
3663 unsigned long to
= dd
->port
->ic_pause_timer
+
3664 msecs_to_jiffies(1000);
3665 if (time_after(jiffies
, to
)) {
3666 clear_bit(MTIP_PF_SE_ACTIVE_BIT
,
3668 clear_bit(MTIP_DDF_SEC_LOCK_BIT
, &dd
->dd_flag
);
3669 dd
->port
->ic_pause_timer
= 0;
3670 wake_up_interruptible(&dd
->port
->svc_wait
);
3680 * Block layer make request function.
3682 * This function is called by the kernel to process a BIO for
3685 * @queue Pointer to the request queue. Unused other than to obtain
3686 * the driver data structure.
3687 * @rq Pointer to the request.
3690 static int mtip_submit_request(struct blk_mq_hw_ctx
*hctx
, struct request
*rq
)
3692 struct driver_data
*dd
= hctx
->queue
->queuedata
;
3693 struct mtip_cmd
*cmd
= blk_mq_rq_to_pdu(rq
);
3696 if (is_se_active(dd
))
3699 if (unlikely(dd
->dd_flag
& MTIP_DDF_STOP_IO
)) {
3700 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
3704 if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))) {
3707 if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT
,
3712 if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT
, &dd
->dd_flag
) ||
3713 test_bit(MTIP_DDF_REBUILD_FAILED_BIT
, &dd
->dd_flag
)))
3717 if (req_op(rq
) == REQ_OP_DISCARD
) {
3720 err
= mtip_send_trim(dd
, blk_rq_pos(rq
), blk_rq_sectors(rq
));
3721 blk_mq_end_request(rq
, err
);
3725 /* Create the scatter list for this request. */
3726 nents
= blk_rq_map_sg(hctx
->queue
, rq
, cmd
->sg
);
3728 /* Issue the read/write. */
3729 mtip_hw_submit_io(dd
, rq
, cmd
, nents
, hctx
);
3733 static bool mtip_check_unal_depth(struct blk_mq_hw_ctx
*hctx
,
3736 struct driver_data
*dd
= hctx
->queue
->queuedata
;
3737 struct mtip_cmd
*cmd
= blk_mq_rq_to_pdu(rq
);
3739 if (rq_data_dir(rq
) == READ
|| !dd
->unal_qdepth
)
3743 * If unaligned depth must be limited on this controller, mark it
3744 * as unaligned if the IO isn't on a 4k boundary (start of length).
3746 if (blk_rq_sectors(rq
) <= 64) {
3747 if ((blk_rq_pos(rq
) & 7) || (blk_rq_sectors(rq
) & 7))
3751 if (cmd
->unaligned
&& down_trylock(&dd
->port
->cmd_slot_unal
))
3757 static int mtip_queue_rq(struct blk_mq_hw_ctx
*hctx
,
3758 const struct blk_mq_queue_data
*bd
)
3760 struct request
*rq
= bd
->rq
;
3763 mtip_init_cmd_header(rq
);
3765 if (unlikely(mtip_check_unal_depth(hctx
, rq
)))
3766 return BLK_MQ_RQ_QUEUE_BUSY
;
3768 blk_mq_start_request(rq
);
3770 ret
= mtip_submit_request(hctx
, rq
);
3772 return BLK_MQ_RQ_QUEUE_OK
;
3774 return BLK_MQ_RQ_QUEUE_ERROR
;
3777 static void mtip_free_cmd(void *data
, struct request
*rq
,
3778 unsigned int hctx_idx
, unsigned int request_idx
)
3780 struct driver_data
*dd
= data
;
3781 struct mtip_cmd
*cmd
= blk_mq_rq_to_pdu(rq
);
3786 dmam_free_coherent(&dd
->pdev
->dev
, CMD_DMA_ALLOC_SZ
,
3787 cmd
->command
, cmd
->command_dma
);
3790 static int mtip_init_cmd(void *data
, struct request
*rq
, unsigned int hctx_idx
,
3791 unsigned int request_idx
, unsigned int numa_node
)
3793 struct driver_data
*dd
= data
;
3794 struct mtip_cmd
*cmd
= blk_mq_rq_to_pdu(rq
);
3797 * For flush requests, request_idx starts at the end of the
3798 * tag space. Since we don't support FLUSH/FUA, simply return
3799 * 0 as there's nothing to be done.
3801 if (request_idx
>= MTIP_MAX_COMMAND_SLOTS
)
3804 cmd
->command
= dmam_alloc_coherent(&dd
->pdev
->dev
, CMD_DMA_ALLOC_SZ
,
3805 &cmd
->command_dma
, GFP_KERNEL
);
3809 memset(cmd
->command
, 0, CMD_DMA_ALLOC_SZ
);
3811 sg_init_table(cmd
->sg
, MTIP_MAX_SG
);
3815 static enum blk_eh_timer_return
mtip_cmd_timeout(struct request
*req
,
3818 struct driver_data
*dd
= req
->q
->queuedata
;
3823 if (test_bit(req
->tag
, dd
->port
->cmds_to_issue
))
3826 if (test_and_set_bit(MTIP_PF_TO_ACTIVE_BIT
, &dd
->port
->flags
))
3829 wake_up_interruptible(&dd
->port
->svc_wait
);
3831 return BLK_EH_RESET_TIMER
;
3834 static const struct blk_mq_ops mtip_mq_ops
= {
3835 .queue_rq
= mtip_queue_rq
,
3836 .init_request
= mtip_init_cmd
,
3837 .exit_request
= mtip_free_cmd
,
3838 .complete
= mtip_softirq_done_fn
,
3839 .timeout
= mtip_cmd_timeout
,
3843 * Block layer initialization function.
3845 * This function is called once by the PCI layer for each P320
3846 * device that is connected to the system.
3848 * @dd Pointer to the driver data structure.
3851 * 0 on success else an error code.
3853 static int mtip_block_initialize(struct driver_data
*dd
)
3855 int rv
= 0, wait_for_rebuild
= 0;
3857 unsigned int index
= 0;
3858 struct kobject
*kobj
;
3861 goto skip_create_disk
; /* hw init done, before rebuild */
3863 if (mtip_hw_init(dd
)) {
3865 goto protocol_init_error
;
3868 dd
->disk
= alloc_disk_node(MTIP_MAX_MINORS
, dd
->numa_node
);
3869 if (dd
->disk
== NULL
) {
3870 dev_err(&dd
->pdev
->dev
,
3871 "Unable to allocate gendisk structure\n");
3873 goto alloc_disk_error
;
3876 /* Generate the disk name, implemented same as in sd.c */
3878 if (!ida_pre_get(&rssd_index_ida
, GFP_KERNEL
)) {
3883 spin_lock(&rssd_index_lock
);
3884 rv
= ida_get_new(&rssd_index_ida
, &index
);
3885 spin_unlock(&rssd_index_lock
);
3886 } while (rv
== -EAGAIN
);
3891 rv
= rssd_disk_name_format("rssd",
3893 dd
->disk
->disk_name
,
3896 goto disk_index_error
;
3898 dd
->disk
->major
= dd
->major
;
3899 dd
->disk
->first_minor
= index
* MTIP_MAX_MINORS
;
3900 dd
->disk
->minors
= MTIP_MAX_MINORS
;
3901 dd
->disk
->fops
= &mtip_block_ops
;
3902 dd
->disk
->private_data
= dd
;
3905 mtip_hw_debugfs_init(dd
);
3907 memset(&dd
->tags
, 0, sizeof(dd
->tags
));
3908 dd
->tags
.ops
= &mtip_mq_ops
;
3909 dd
->tags
.nr_hw_queues
= 1;
3910 dd
->tags
.queue_depth
= MTIP_MAX_COMMAND_SLOTS
;
3911 dd
->tags
.reserved_tags
= 1;
3912 dd
->tags
.cmd_size
= sizeof(struct mtip_cmd
);
3913 dd
->tags
.numa_node
= dd
->numa_node
;
3914 dd
->tags
.flags
= BLK_MQ_F_SHOULD_MERGE
| BLK_MQ_F_NO_SCHED
;
3915 dd
->tags
.driver_data
= dd
;
3916 dd
->tags
.timeout
= MTIP_NCQ_CMD_TIMEOUT_MS
;
3918 rv
= blk_mq_alloc_tag_set(&dd
->tags
);
3920 dev_err(&dd
->pdev
->dev
,
3921 "Unable to allocate request queue\n");
3922 goto block_queue_alloc_tag_error
;
3925 /* Allocate the request queue. */
3926 dd
->queue
= blk_mq_init_queue(&dd
->tags
);
3927 if (IS_ERR(dd
->queue
)) {
3928 dev_err(&dd
->pdev
->dev
,
3929 "Unable to allocate request queue\n");
3931 goto block_queue_alloc_init_error
;
3934 dd
->disk
->queue
= dd
->queue
;
3935 dd
->queue
->queuedata
= dd
;
3938 /* Initialize the protocol layer. */
3939 wait_for_rebuild
= mtip_hw_get_identify(dd
);
3940 if (wait_for_rebuild
< 0) {
3941 dev_err(&dd
->pdev
->dev
,
3942 "Protocol layer initialization failed\n");
3944 goto init_hw_cmds_error
;
3948 * if rebuild pending, start the service thread, and delay the block
3949 * queue creation and device_add_disk()
3951 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
3952 goto start_service_thread
;
3954 /* Set device limits. */
3955 set_bit(QUEUE_FLAG_NONROT
, &dd
->queue
->queue_flags
);
3956 clear_bit(QUEUE_FLAG_ADD_RANDOM
, &dd
->queue
->queue_flags
);
3957 blk_queue_max_segments(dd
->queue
, MTIP_MAX_SG
);
3958 blk_queue_physical_block_size(dd
->queue
, 4096);
3959 blk_queue_max_hw_sectors(dd
->queue
, 0xffff);
3960 blk_queue_max_segment_size(dd
->queue
, 0x400000);
3961 blk_queue_io_min(dd
->queue
, 4096);
3962 blk_queue_bounce_limit(dd
->queue
, dd
->pdev
->dma_mask
);
3964 /* Signal trim support */
3965 if (dd
->trim_supp
== true) {
3966 set_bit(QUEUE_FLAG_DISCARD
, &dd
->queue
->queue_flags
);
3967 dd
->queue
->limits
.discard_granularity
= 4096;
3968 blk_queue_max_discard_sectors(dd
->queue
,
3969 MTIP_MAX_TRIM_ENTRY_LEN
* MTIP_MAX_TRIM_ENTRIES
);
3972 /* Set the capacity of the device in 512 byte sectors. */
3973 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3974 dev_warn(&dd
->pdev
->dev
,
3975 "Could not read drive capacity\n");
3977 goto read_capacity_error
;
3979 set_capacity(dd
->disk
, capacity
);
3981 /* Enable the block device and add it to /dev */
3982 device_add_disk(&dd
->pdev
->dev
, dd
->disk
);
3984 dd
->bdev
= bdget_disk(dd
->disk
, 0);
3986 * Now that the disk is active, initialize any sysfs attributes
3987 * managed by the protocol layer.
3989 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3991 mtip_hw_sysfs_init(dd
, kobj
);
3995 if (dd
->mtip_svc_handler
) {
3996 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
3997 return rv
; /* service thread created for handling rebuild */
4000 start_service_thread
:
4001 dd
->mtip_svc_handler
= kthread_create_on_node(mtip_service_thread
,
4003 "mtip_svc_thd_%02d", index
);
4005 if (IS_ERR(dd
->mtip_svc_handler
)) {
4006 dev_err(&dd
->pdev
->dev
, "service thread failed to start\n");
4007 dd
->mtip_svc_handler
= NULL
;
4009 goto kthread_run_error
;
4011 wake_up_process(dd
->mtip_svc_handler
);
4012 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
4013 rv
= wait_for_rebuild
;
4021 /* Delete our gendisk. This also removes the device from /dev */
4022 del_gendisk(dd
->disk
);
4024 read_capacity_error
:
4026 blk_cleanup_queue(dd
->queue
);
4027 block_queue_alloc_init_error
:
4028 blk_mq_free_tag_set(&dd
->tags
);
4029 block_queue_alloc_tag_error
:
4030 mtip_hw_debugfs_exit(dd
);
4032 spin_lock(&rssd_index_lock
);
4033 ida_remove(&rssd_index_ida
, index
);
4034 spin_unlock(&rssd_index_lock
);
4040 mtip_hw_exit(dd
); /* De-initialize the protocol layer. */
4042 protocol_init_error
:
4046 static void mtip_no_dev_cleanup(struct request
*rq
, void *data
, bool reserv
)
4048 struct driver_data
*dd
= (struct driver_data
*)data
;
4049 struct mtip_cmd
*cmd
;
4051 if (likely(!reserv
)) {
4052 cmd
= blk_mq_rq_to_pdu(rq
);
4053 cmd
->status
= -ENODEV
;
4054 blk_mq_complete_request(rq
);
4055 } else if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &dd
->port
->flags
)) {
4057 cmd
= mtip_cmd_from_tag(dd
, MTIP_TAG_INTERNAL
);
4059 cmd
->comp_func(dd
->port
, MTIP_TAG_INTERNAL
,
4065 * Block layer deinitialization function.
4067 * Called by the PCI layer as each P320 device is removed.
4069 * @dd Pointer to the driver data structure.
4074 static int mtip_block_remove(struct driver_data
*dd
)
4076 struct kobject
*kobj
;
4078 mtip_hw_debugfs_exit(dd
);
4080 if (dd
->mtip_svc_handler
) {
4081 set_bit(MTIP_PF_SVC_THD_STOP_BIT
, &dd
->port
->flags
);
4082 wake_up_interruptible(&dd
->port
->svc_wait
);
4083 kthread_stop(dd
->mtip_svc_handler
);
4086 /* Clean up the sysfs attributes, if created */
4087 if (test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
)) {
4088 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
4090 mtip_hw_sysfs_exit(dd
, kobj
);
4097 * Explicitly wait here for IOs to quiesce,
4098 * as mtip_standby_drive usually won't wait for IOs.
4100 if (!mtip_quiesce_io(dd
->port
, MTIP_QUIESCE_IO_TIMEOUT_MS
))
4101 mtip_standby_drive(dd
);
4104 dev_info(&dd
->pdev
->dev
, "device %s surprise removal\n",
4105 dd
->disk
->disk_name
);
4107 blk_freeze_queue_start(dd
->queue
);
4108 blk_mq_stop_hw_queues(dd
->queue
);
4109 blk_mq_tagset_busy_iter(&dd
->tags
, mtip_no_dev_cleanup
, dd
);
4112 * Delete our gendisk structure. This also removes the device
4120 if (test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
))
4121 del_gendisk(dd
->disk
);
4122 if (dd
->disk
->queue
) {
4123 blk_cleanup_queue(dd
->queue
);
4124 blk_mq_free_tag_set(&dd
->tags
);
4131 spin_lock(&rssd_index_lock
);
4132 ida_remove(&rssd_index_ida
, dd
->index
);
4133 spin_unlock(&rssd_index_lock
);
4135 /* De-initialize the protocol layer. */
4142 * Function called by the PCI layer when just before the
4143 * machine shuts down.
4145 * If a protocol layer shutdown function is present it will be called
4148 * @dd Pointer to the driver data structure.
4153 static int mtip_block_shutdown(struct driver_data
*dd
)
4155 mtip_hw_shutdown(dd
);
4157 /* Delete our gendisk structure, and cleanup the blk queue. */
4159 dev_info(&dd
->pdev
->dev
,
4160 "Shutting down %s ...\n", dd
->disk
->disk_name
);
4162 if (test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
))
4163 del_gendisk(dd
->disk
);
4164 if (dd
->disk
->queue
) {
4165 blk_cleanup_queue(dd
->queue
);
4166 blk_mq_free_tag_set(&dd
->tags
);
4173 spin_lock(&rssd_index_lock
);
4174 ida_remove(&rssd_index_ida
, dd
->index
);
4175 spin_unlock(&rssd_index_lock
);
4179 static int mtip_block_suspend(struct driver_data
*dd
)
4181 dev_info(&dd
->pdev
->dev
,
4182 "Suspending %s ...\n", dd
->disk
->disk_name
);
4183 mtip_hw_suspend(dd
);
4187 static int mtip_block_resume(struct driver_data
*dd
)
4189 dev_info(&dd
->pdev
->dev
, "Resuming %s ...\n",
4190 dd
->disk
->disk_name
);
4195 static void drop_cpu(int cpu
)
4200 static int get_least_used_cpu_on_node(int node
)
4202 int cpu
, least_used_cpu
, least_cnt
;
4203 const struct cpumask
*node_mask
;
4205 node_mask
= cpumask_of_node(node
);
4206 least_used_cpu
= cpumask_first(node_mask
);
4207 least_cnt
= cpu_use
[least_used_cpu
];
4208 cpu
= least_used_cpu
;
4210 for_each_cpu(cpu
, node_mask
) {
4211 if (cpu_use
[cpu
] < least_cnt
) {
4212 least_used_cpu
= cpu
;
4213 least_cnt
= cpu_use
[cpu
];
4216 cpu_use
[least_used_cpu
]++;
4217 return least_used_cpu
;
4220 /* Helper for selecting a node in round robin mode */
4221 static inline int mtip_get_next_rr_node(void)
4223 static int next_node
= -1;
4225 if (next_node
== -1) {
4226 next_node
= first_online_node
;
4230 next_node
= next_online_node(next_node
);
4231 if (next_node
== MAX_NUMNODES
)
4232 next_node
= first_online_node
;
4236 static DEFINE_HANDLER(0);
4237 static DEFINE_HANDLER(1);
4238 static DEFINE_HANDLER(2);
4239 static DEFINE_HANDLER(3);
4240 static DEFINE_HANDLER(4);
4241 static DEFINE_HANDLER(5);
4242 static DEFINE_HANDLER(6);
4243 static DEFINE_HANDLER(7);
4245 static void mtip_disable_link_opts(struct driver_data
*dd
, struct pci_dev
*pdev
)
4248 unsigned short pcie_dev_ctrl
;
4250 pos
= pci_find_capability(pdev
, PCI_CAP_ID_EXP
);
4252 pci_read_config_word(pdev
,
4253 pos
+ PCI_EXP_DEVCTL
,
4255 if (pcie_dev_ctrl
& (1 << 11) ||
4256 pcie_dev_ctrl
& (1 << 4)) {
4257 dev_info(&dd
->pdev
->dev
,
4258 "Disabling ERO/No-Snoop on bridge device %04x:%04x\n",
4259 pdev
->vendor
, pdev
->device
);
4260 pcie_dev_ctrl
&= ~(PCI_EXP_DEVCTL_NOSNOOP_EN
|
4261 PCI_EXP_DEVCTL_RELAX_EN
);
4262 pci_write_config_word(pdev
,
4263 pos
+ PCI_EXP_DEVCTL
,
4269 static void mtip_fix_ero_nosnoop(struct driver_data
*dd
, struct pci_dev
*pdev
)
4272 * This workaround is specific to AMD/ATI chipset with a PCI upstream
4273 * device with device id 0x5aXX
4275 if (pdev
->bus
&& pdev
->bus
->self
) {
4276 if (pdev
->bus
->self
->vendor
== PCI_VENDOR_ID_ATI
&&
4277 ((pdev
->bus
->self
->device
& 0xff00) == 0x5a00)) {
4278 mtip_disable_link_opts(dd
, pdev
->bus
->self
);
4280 /* Check further up the topology */
4281 struct pci_dev
*parent_dev
= pdev
->bus
->self
;
4282 if (parent_dev
->bus
&&
4283 parent_dev
->bus
->parent
&&
4284 parent_dev
->bus
->parent
->self
&&
4285 parent_dev
->bus
->parent
->self
->vendor
==
4286 PCI_VENDOR_ID_ATI
&&
4287 (parent_dev
->bus
->parent
->self
->device
&
4288 0xff00) == 0x5a00) {
4289 mtip_disable_link_opts(dd
,
4290 parent_dev
->bus
->parent
->self
);
4297 * Called for each supported PCI device detected.
4299 * This function allocates the private data structure, enables the
4300 * PCI device and then calls the block layer initialization function.
4303 * 0 on success else an error code.
4305 static int mtip_pci_probe(struct pci_dev
*pdev
,
4306 const struct pci_device_id
*ent
)
4309 struct driver_data
*dd
= NULL
;
4311 const struct cpumask
*node_mask
;
4312 int cpu
, i
= 0, j
= 0;
4313 int my_node
= NUMA_NO_NODE
;
4314 unsigned long flags
;
4316 /* Allocate memory for this devices private data. */
4317 my_node
= pcibus_to_node(pdev
->bus
);
4318 if (my_node
!= NUMA_NO_NODE
) {
4319 if (!node_online(my_node
))
4320 my_node
= mtip_get_next_rr_node();
4322 dev_info(&pdev
->dev
, "Kernel not reporting proximity, choosing a node\n");
4323 my_node
= mtip_get_next_rr_node();
4325 dev_info(&pdev
->dev
, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n",
4326 my_node
, pcibus_to_node(pdev
->bus
), dev_to_node(&pdev
->dev
),
4327 cpu_to_node(raw_smp_processor_id()), raw_smp_processor_id());
4329 dd
= kzalloc_node(sizeof(struct driver_data
), GFP_KERNEL
, my_node
);
4332 "Unable to allocate memory for driver data\n");
4336 /* Attach the private data to this PCI device. */
4337 pci_set_drvdata(pdev
, dd
);
4339 rv
= pcim_enable_device(pdev
);
4341 dev_err(&pdev
->dev
, "Unable to enable device\n");
4345 /* Map BAR5 to memory. */
4346 rv
= pcim_iomap_regions(pdev
, 1 << MTIP_ABAR
, MTIP_DRV_NAME
);
4348 dev_err(&pdev
->dev
, "Unable to map regions\n");
4352 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(64))) {
4353 rv
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
4356 rv
= pci_set_consistent_dma_mask(pdev
,
4359 dev_warn(&pdev
->dev
,
4360 "64-bit DMA enable failed\n");
4366 /* Copy the info we may need later into the private data structure. */
4367 dd
->major
= mtip_major
;
4368 dd
->instance
= instance
;
4370 dd
->numa_node
= my_node
;
4372 INIT_LIST_HEAD(&dd
->online_list
);
4373 INIT_LIST_HEAD(&dd
->remove_list
);
4375 memset(dd
->workq_name
, 0, 32);
4376 snprintf(dd
->workq_name
, 31, "mtipq%d", dd
->instance
);
4378 dd
->isr_workq
= create_workqueue(dd
->workq_name
);
4379 if (!dd
->isr_workq
) {
4380 dev_warn(&pdev
->dev
, "Can't create wq %d\n", dd
->instance
);
4382 goto block_initialize_err
;
4385 memset(cpu_list
, 0, sizeof(cpu_list
));
4387 node_mask
= cpumask_of_node(dd
->numa_node
);
4388 if (!cpumask_empty(node_mask
)) {
4389 for_each_cpu(cpu
, node_mask
)
4391 snprintf(&cpu_list
[j
], 256 - j
, "%d ", cpu
);
4392 j
= strlen(cpu_list
);
4395 dev_info(&pdev
->dev
, "Node %d on package %d has %d cpu(s): %s\n",
4397 topology_physical_package_id(cpumask_first(node_mask
)),
4398 nr_cpus_node(dd
->numa_node
),
4401 dev_dbg(&pdev
->dev
, "mtip32xx: node_mask empty\n");
4403 dd
->isr_binding
= get_least_used_cpu_on_node(dd
->numa_node
);
4404 dev_info(&pdev
->dev
, "Initial IRQ binding node:cpu %d:%d\n",
4405 cpu_to_node(dd
->isr_binding
), dd
->isr_binding
);
4407 /* first worker context always runs in ISR */
4408 dd
->work
[0].cpu_binding
= dd
->isr_binding
;
4409 dd
->work
[1].cpu_binding
= get_least_used_cpu_on_node(dd
->numa_node
);
4410 dd
->work
[2].cpu_binding
= get_least_used_cpu_on_node(dd
->numa_node
);
4411 dd
->work
[3].cpu_binding
= dd
->work
[0].cpu_binding
;
4412 dd
->work
[4].cpu_binding
= dd
->work
[1].cpu_binding
;
4413 dd
->work
[5].cpu_binding
= dd
->work
[2].cpu_binding
;
4414 dd
->work
[6].cpu_binding
= dd
->work
[2].cpu_binding
;
4415 dd
->work
[7].cpu_binding
= dd
->work
[1].cpu_binding
;
4417 /* Log the bindings */
4418 for_each_present_cpu(cpu
) {
4419 memset(cpu_list
, 0, sizeof(cpu_list
));
4420 for (i
= 0, j
= 0; i
< MTIP_MAX_SLOT_GROUPS
; i
++) {
4421 if (dd
->work
[i
].cpu_binding
== cpu
) {
4422 snprintf(&cpu_list
[j
], 256 - j
, "%d ", i
);
4423 j
= strlen(cpu_list
);
4427 dev_info(&pdev
->dev
, "CPU %d: WQs %s\n", cpu
, cpu_list
);
4430 INIT_WORK(&dd
->work
[0].work
, mtip_workq_sdbf0
);
4431 INIT_WORK(&dd
->work
[1].work
, mtip_workq_sdbf1
);
4432 INIT_WORK(&dd
->work
[2].work
, mtip_workq_sdbf2
);
4433 INIT_WORK(&dd
->work
[3].work
, mtip_workq_sdbf3
);
4434 INIT_WORK(&dd
->work
[4].work
, mtip_workq_sdbf4
);
4435 INIT_WORK(&dd
->work
[5].work
, mtip_workq_sdbf5
);
4436 INIT_WORK(&dd
->work
[6].work
, mtip_workq_sdbf6
);
4437 INIT_WORK(&dd
->work
[7].work
, mtip_workq_sdbf7
);
4439 pci_set_master(pdev
);
4440 rv
= pci_enable_msi(pdev
);
4442 dev_warn(&pdev
->dev
,
4443 "Unable to enable MSI interrupt.\n");
4444 goto msi_initialize_err
;
4447 mtip_fix_ero_nosnoop(dd
, pdev
);
4449 /* Initialize the block layer. */
4450 rv
= mtip_block_initialize(dd
);
4453 "Unable to initialize block layer\n");
4454 goto block_initialize_err
;
4458 * Increment the instance count so that each device has a unique
4462 if (rv
!= MTIP_FTL_REBUILD_MAGIC
)
4463 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
4465 rv
= 0; /* device in rebuild state, return 0 from probe */
4467 /* Add to online list even if in ftl rebuild */
4468 spin_lock_irqsave(&dev_lock
, flags
);
4469 list_add(&dd
->online_list
, &online_list
);
4470 spin_unlock_irqrestore(&dev_lock
, flags
);
4474 block_initialize_err
:
4475 pci_disable_msi(pdev
);
4478 if (dd
->isr_workq
) {
4479 flush_workqueue(dd
->isr_workq
);
4480 destroy_workqueue(dd
->isr_workq
);
4481 drop_cpu(dd
->work
[0].cpu_binding
);
4482 drop_cpu(dd
->work
[1].cpu_binding
);
4483 drop_cpu(dd
->work
[2].cpu_binding
);
4486 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4490 pci_set_drvdata(pdev
, NULL
);
4497 * Called for each probed device when the device is removed or the
4498 * driver is unloaded.
4503 static void mtip_pci_remove(struct pci_dev
*pdev
)
4505 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4506 unsigned long flags
, to
;
4508 set_bit(MTIP_DDF_REMOVAL_BIT
, &dd
->dd_flag
);
4510 spin_lock_irqsave(&dev_lock
, flags
);
4511 list_del_init(&dd
->online_list
);
4512 list_add(&dd
->remove_list
, &removing_list
);
4513 spin_unlock_irqrestore(&dev_lock
, flags
);
4515 mtip_check_surprise_removal(pdev
);
4516 synchronize_irq(dd
->pdev
->irq
);
4518 /* Spin until workers are done */
4519 to
= jiffies
+ msecs_to_jiffies(4000);
4522 } while (atomic_read(&dd
->irq_workers_active
) != 0 &&
4523 time_before(jiffies
, to
));
4526 fsync_bdev(dd
->bdev
);
4528 if (atomic_read(&dd
->irq_workers_active
) != 0) {
4529 dev_warn(&dd
->pdev
->dev
,
4530 "Completion workers still active!\n");
4533 blk_set_queue_dying(dd
->queue
);
4534 set_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
);
4536 /* Clean up the block layer. */
4537 mtip_block_remove(dd
);
4539 if (dd
->isr_workq
) {
4540 flush_workqueue(dd
->isr_workq
);
4541 destroy_workqueue(dd
->isr_workq
);
4542 drop_cpu(dd
->work
[0].cpu_binding
);
4543 drop_cpu(dd
->work
[1].cpu_binding
);
4544 drop_cpu(dd
->work
[2].cpu_binding
);
4547 pci_disable_msi(pdev
);
4549 spin_lock_irqsave(&dev_lock
, flags
);
4550 list_del_init(&dd
->remove_list
);
4551 spin_unlock_irqrestore(&dev_lock
, flags
);
4555 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4556 pci_set_drvdata(pdev
, NULL
);
4560 * Called for each probed device when the device is suspended.
4566 static int mtip_pci_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
4569 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4573 "Driver private datastructure is NULL\n");
4577 set_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4579 /* Disable ports & interrupts then send standby immediate */
4580 rv
= mtip_block_suspend(dd
);
4583 "Failed to suspend controller\n");
4588 * Save the pci config space to pdev structure &
4589 * disable the device
4591 pci_save_state(pdev
);
4592 pci_disable_device(pdev
);
4594 /* Move to Low power state*/
4595 pci_set_power_state(pdev
, PCI_D3hot
);
4601 * Called for each probed device when the device is resumed.
4607 static int mtip_pci_resume(struct pci_dev
*pdev
)
4610 struct driver_data
*dd
;
4612 dd
= pci_get_drvdata(pdev
);
4615 "Driver private datastructure is NULL\n");
4619 /* Move the device to active State */
4620 pci_set_power_state(pdev
, PCI_D0
);
4622 /* Restore PCI configuration space */
4623 pci_restore_state(pdev
);
4625 /* Enable the PCI device*/
4626 rv
= pcim_enable_device(pdev
);
4629 "Failed to enable card during resume\n");
4632 pci_set_master(pdev
);
4635 * Calls hbaReset, initPort, & startPort function
4636 * then enables interrupts
4638 rv
= mtip_block_resume(dd
);
4640 dev_err(&pdev
->dev
, "Unable to resume\n");
4643 clear_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4654 static void mtip_pci_shutdown(struct pci_dev
*pdev
)
4656 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4658 mtip_block_shutdown(dd
);
4661 /* Table of device ids supported by this driver. */
4662 static const struct pci_device_id mtip_pci_tbl
[] = {
4663 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320H_DEVICE_ID
) },
4664 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320M_DEVICE_ID
) },
4665 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320S_DEVICE_ID
) },
4666 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P325M_DEVICE_ID
) },
4667 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P420H_DEVICE_ID
) },
4668 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P420M_DEVICE_ID
) },
4669 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P425M_DEVICE_ID
) },
4673 /* Structure that describes the PCI driver functions. */
4674 static struct pci_driver mtip_pci_driver
= {
4675 .name
= MTIP_DRV_NAME
,
4676 .id_table
= mtip_pci_tbl
,
4677 .probe
= mtip_pci_probe
,
4678 .remove
= mtip_pci_remove
,
4679 .suspend
= mtip_pci_suspend
,
4680 .resume
= mtip_pci_resume
,
4681 .shutdown
= mtip_pci_shutdown
,
4684 MODULE_DEVICE_TABLE(pci
, mtip_pci_tbl
);
4687 * Module initialization function.
4689 * Called once when the module is loaded. This function allocates a major
4690 * block device number to the Cyclone devices and registers the PCI layer
4694 * 0 on success else error code.
4696 static int __init
mtip_init(void)
4700 pr_info(MTIP_DRV_NAME
" Version " MTIP_DRV_VERSION
"\n");
4702 spin_lock_init(&dev_lock
);
4704 INIT_LIST_HEAD(&online_list
);
4705 INIT_LIST_HEAD(&removing_list
);
4707 /* Allocate a major block device number to use with this driver. */
4708 error
= register_blkdev(0, MTIP_DRV_NAME
);
4710 pr_err("Unable to register block device (%d)\n",
4716 dfs_parent
= debugfs_create_dir("rssd", NULL
);
4717 if (IS_ERR_OR_NULL(dfs_parent
)) {
4718 pr_warn("Error creating debugfs parent\n");
4722 dfs_device_status
= debugfs_create_file("device_status",
4723 S_IRUGO
, dfs_parent
, NULL
,
4724 &mtip_device_status_fops
);
4725 if (IS_ERR_OR_NULL(dfs_device_status
)) {
4726 pr_err("Error creating device_status node\n");
4727 dfs_device_status
= NULL
;
4731 /* Register our PCI operations. */
4732 error
= pci_register_driver(&mtip_pci_driver
);
4734 debugfs_remove(dfs_parent
);
4735 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4742 * Module de-initialization function.
4744 * Called once when the module is unloaded. This function deallocates
4745 * the major block device number allocated by mtip_init() and
4746 * unregisters the PCI layer of the driver.
4751 static void __exit
mtip_exit(void)
4753 /* Release the allocated major block device number. */
4754 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4756 /* Unregister the PCI driver. */
4757 pci_unregister_driver(&mtip_pci_driver
);
4759 debugfs_remove_recursive(dfs_parent
);
4762 MODULE_AUTHOR("Micron Technology, Inc");
4763 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
4764 MODULE_LICENSE("GPL");
4765 MODULE_VERSION(MTIP_DRV_VERSION
);
4767 module_init(mtip_init
);
4768 module_exit(mtip_exit
);