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/bio.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/idr.h>
37 #include <linux/kthread.h>
38 #include <../drivers/ata/ahci.h>
39 #include <linux/export.h>
40 #include <linux/debugfs.h>
43 #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
44 #define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16))
45 #define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS)
46 #define HW_PORT_PRIV_DMA_SZ \
47 (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ)
49 #define HOST_CAP_NZDMA (1 << 19)
50 #define HOST_HSORG 0xFC
51 #define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
52 #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
53 #define HSORG_HWREV 0xFF00
54 #define HSORG_STYLE 0x8
55 #define HSORG_SLOTGROUPS 0x7
57 #define PORT_COMMAND_ISSUE 0x38
58 #define PORT_SDBV 0x7C
60 #define PORT_OFFSET 0x100
61 #define PORT_MEM_SIZE 0x80
63 #define PORT_IRQ_ERR \
64 (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
65 PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
66 PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
68 #define PORT_IRQ_LEGACY \
69 (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
70 #define PORT_IRQ_HANDLED \
71 (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
72 PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
73 PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
74 #define DEF_PORT_IRQ \
75 (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
78 #define MTIP_PRODUCT_UNKNOWN 0x00
79 #define MTIP_PRODUCT_ASICFPGA 0x11
81 /* Device instance number, incremented each time a device is probed. */
85 * Global variable used to hold the major block device number
86 * allocated in mtip_init().
88 static int mtip_major
;
89 static struct dentry
*dfs_parent
;
91 static DEFINE_SPINLOCK(rssd_index_lock
);
92 static DEFINE_IDA(rssd_index_ida
);
94 static int mtip_block_initialize(struct driver_data
*dd
);
97 struct mtip_compat_ide_task_request_s
{
100 ide_reg_valid_t out_flags
;
101 ide_reg_valid_t in_flags
;
104 compat_ulong_t out_size
;
105 compat_ulong_t in_size
;
110 * This function check_for_surprise_removal is called
111 * while card is removed from the system and it will
112 * read the vendor id from the configration space
114 * @pdev Pointer to the pci_dev structure.
117 * true if device removed, else false
119 static bool mtip_check_surprise_removal(struct pci_dev
*pdev
)
123 /* Read the vendorID from the configuration space */
124 pci_read_config_word(pdev
, 0x00, &vendor_id
);
125 if (vendor_id
== 0xFFFF)
126 return true; /* device removed */
128 return false; /* device present */
132 * This function is called for clean the pending command in the
133 * command slot during the surprise removal of device and return
134 * error to the upper layer.
136 * @dd Pointer to the DRIVER_DATA structure.
141 static void mtip_command_cleanup(struct driver_data
*dd
)
143 int group
= 0, commandslot
= 0, commandindex
= 0;
144 struct mtip_cmd
*command
;
145 struct mtip_port
*port
= dd
->port
;
146 static int in_progress
;
153 for (group
= 0; group
< 4; group
++) {
154 for (commandslot
= 0; commandslot
< 32; commandslot
++) {
155 if (!(port
->allocated
[group
] & (1 << commandslot
)))
158 commandindex
= group
<< 5 | commandslot
;
159 command
= &port
->commands
[commandindex
];
161 if (atomic_read(&command
->active
)
162 && (command
->async_callback
)) {
163 command
->async_callback(command
->async_data
,
165 command
->async_callback
= NULL
;
166 command
->async_data
= NULL
;
169 dma_unmap_sg(&port
->dd
->pdev
->dev
,
171 command
->scatter_ents
,
178 set_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
);
183 * Obtain an empty command slot.
185 * This function needs to be reentrant since it could be called
186 * at the same time on multiple CPUs. The allocation of the
187 * command slot must be atomic.
189 * @port Pointer to the port data structure.
192 * >= 0 Index of command slot obtained.
193 * -1 No command slots available.
195 static int get_slot(struct mtip_port
*port
)
198 unsigned int num_command_slots
= port
->dd
->slot_groups
* 32;
201 * Try 10 times, because there is a small race here.
202 * that's ok, because it's still cheaper than a lock.
204 * Race: Since this section is not protected by lock, same bit
205 * could be chosen by different process contexts running in
206 * different processor. So instead of costly lock, we are going
209 for (i
= 0; i
< 10; i
++) {
210 slot
= find_next_zero_bit(port
->allocated
,
211 num_command_slots
, 1);
212 if ((slot
< num_command_slots
) &&
213 (!test_and_set_bit(slot
, port
->allocated
)))
216 dev_warn(&port
->dd
->pdev
->dev
, "Failed to get a tag.\n");
218 if (mtip_check_surprise_removal(port
->dd
->pdev
)) {
219 /* Device not present, clean outstanding commands */
220 mtip_command_cleanup(port
->dd
);
226 * Release a command slot.
228 * @port Pointer to the port data structure.
229 * @tag Tag of command to release
234 static inline void release_slot(struct mtip_port
*port
, int tag
)
236 smp_mb__before_clear_bit();
237 clear_bit(tag
, port
->allocated
);
238 smp_mb__after_clear_bit();
242 * Reset the HBA (without sleeping)
244 * Just like hba_reset, except does not call sleep, so can be
245 * run from interrupt/tasklet context.
247 * @dd Pointer to the driver data structure.
250 * 0 The reset was successful.
251 * -1 The HBA Reset bit did not clear.
253 static int hba_reset_nosleep(struct driver_data
*dd
)
255 unsigned long timeout
;
257 /* Chip quirk: quiesce any chip function */
260 /* Set the reset bit */
261 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
264 readl(dd
->mmio
+ HOST_CTL
);
267 * Wait 10ms then spin for up to 1 second
268 * waiting for reset acknowledgement
270 timeout
= jiffies
+ msecs_to_jiffies(1000);
272 while ((readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
273 && time_before(jiffies
, timeout
))
276 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))
279 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
286 * Issue a command to the hardware.
288 * Set the appropriate bit in the s_active and Command Issue hardware
289 * registers, causing hardware command processing to begin.
291 * @port Pointer to the port structure.
292 * @tag The tag of the command to be issued.
297 static inline void mtip_issue_ncq_command(struct mtip_port
*port
, int tag
)
299 atomic_set(&port
->commands
[tag
].active
, 1);
301 spin_lock(&port
->cmd_issue_lock
);
303 writel((1 << MTIP_TAG_BIT(tag
)),
304 port
->s_active
[MTIP_TAG_INDEX(tag
)]);
305 writel((1 << MTIP_TAG_BIT(tag
)),
306 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
308 spin_unlock(&port
->cmd_issue_lock
);
310 /* Set the command's timeout value.*/
311 port
->commands
[tag
].comp_time
= jiffies
+ msecs_to_jiffies(
312 MTIP_NCQ_COMMAND_TIMEOUT_MS
);
316 * Enable/disable the reception of FIS
318 * @port Pointer to the port data structure
319 * @enable 1 to enable, 0 to disable
322 * Previous state: 1 enabled, 0 disabled
324 static int mtip_enable_fis(struct mtip_port
*port
, int enable
)
328 /* enable FIS reception */
329 tmp
= readl(port
->mmio
+ PORT_CMD
);
331 writel(tmp
| PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
333 writel(tmp
& ~PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
336 readl(port
->mmio
+ PORT_CMD
);
338 return (((tmp
& PORT_CMD_FIS_RX
) == PORT_CMD_FIS_RX
));
342 * Enable/disable the DMA engine
344 * @port Pointer to the port data structure
345 * @enable 1 to enable, 0 to disable
348 * Previous state: 1 enabled, 0 disabled.
350 static int mtip_enable_engine(struct mtip_port
*port
, int enable
)
354 /* enable FIS reception */
355 tmp
= readl(port
->mmio
+ PORT_CMD
);
357 writel(tmp
| PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
359 writel(tmp
& ~PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
361 readl(port
->mmio
+ PORT_CMD
);
362 return (((tmp
& PORT_CMD_START
) == PORT_CMD_START
));
366 * Enables the port DMA engine and FIS reception.
371 static inline void mtip_start_port(struct mtip_port
*port
)
373 /* Enable FIS reception */
374 mtip_enable_fis(port
, 1);
376 /* Enable the DMA engine */
377 mtip_enable_engine(port
, 1);
381 * Deinitialize a port by disabling port interrupts, the DMA engine,
384 * @port Pointer to the port structure
389 static inline void mtip_deinit_port(struct mtip_port
*port
)
391 /* Disable interrupts on this port */
392 writel(0, port
->mmio
+ PORT_IRQ_MASK
);
394 /* Disable the DMA engine */
395 mtip_enable_engine(port
, 0);
397 /* Disable FIS reception */
398 mtip_enable_fis(port
, 0);
404 * This function deinitializes the port by calling mtip_deinit_port() and
405 * then initializes it by setting the command header and RX FIS addresses,
406 * clearing the SError register and any pending port interrupts before
407 * re-enabling the default set of port interrupts.
409 * @port Pointer to the port structure.
414 static void mtip_init_port(struct mtip_port
*port
)
417 mtip_deinit_port(port
);
419 /* Program the command list base and FIS base addresses */
420 if (readl(port
->dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
) {
421 writel((port
->command_list_dma
>> 16) >> 16,
422 port
->mmio
+ PORT_LST_ADDR_HI
);
423 writel((port
->rxfis_dma
>> 16) >> 16,
424 port
->mmio
+ PORT_FIS_ADDR_HI
);
427 writel(port
->command_list_dma
& 0xFFFFFFFF,
428 port
->mmio
+ PORT_LST_ADDR
);
429 writel(port
->rxfis_dma
& 0xFFFFFFFF, port
->mmio
+ PORT_FIS_ADDR
);
432 writel(readl(port
->mmio
+ PORT_SCR_ERR
), port
->mmio
+ PORT_SCR_ERR
);
434 /* reset the completed registers.*/
435 for (i
= 0; i
< port
->dd
->slot_groups
; i
++)
436 writel(0xFFFFFFFF, port
->completed
[i
]);
438 /* Clear any pending interrupts for this port */
439 writel(readl(port
->mmio
+ PORT_IRQ_STAT
), port
->mmio
+ PORT_IRQ_STAT
);
441 /* Clear any pending interrupts on the HBA. */
442 writel(readl(port
->dd
->mmio
+ HOST_IRQ_STAT
),
443 port
->dd
->mmio
+ HOST_IRQ_STAT
);
445 /* Enable port interrupts */
446 writel(DEF_PORT_IRQ
, port
->mmio
+ PORT_IRQ_MASK
);
452 * @port Pointer to the port data structure.
457 static void mtip_restart_port(struct mtip_port
*port
)
459 unsigned long timeout
;
461 /* Disable the DMA engine */
462 mtip_enable_engine(port
, 0);
464 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
465 timeout
= jiffies
+ msecs_to_jiffies(500);
466 while ((readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
)
467 && time_before(jiffies
, timeout
))
470 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
474 * Chip quirk: escalate to hba reset if
475 * PxCMD.CR not clear after 500 ms
477 if (readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
) {
478 dev_warn(&port
->dd
->pdev
->dev
,
479 "PxCMD.CR not clear, escalating reset\n");
481 if (hba_reset_nosleep(port
->dd
))
482 dev_err(&port
->dd
->pdev
->dev
,
483 "HBA reset escalation failed.\n");
485 /* 30 ms delay before com reset to quiesce chip */
489 dev_warn(&port
->dd
->pdev
->dev
, "Issuing COM reset\n");
492 writel(readl(port
->mmio
+ PORT_SCR_CTL
) |
493 1, port
->mmio
+ PORT_SCR_CTL
);
494 readl(port
->mmio
+ PORT_SCR_CTL
);
496 /* Wait 1 ms to quiesce chip function */
497 timeout
= jiffies
+ msecs_to_jiffies(1);
498 while (time_before(jiffies
, timeout
))
501 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
504 /* Clear PxSCTL.DET */
505 writel(readl(port
->mmio
+ PORT_SCR_CTL
) & ~1,
506 port
->mmio
+ PORT_SCR_CTL
);
507 readl(port
->mmio
+ PORT_SCR_CTL
);
509 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
510 timeout
= jiffies
+ msecs_to_jiffies(500);
511 while (((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
512 && time_before(jiffies
, timeout
))
515 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
518 if ((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
519 dev_warn(&port
->dd
->pdev
->dev
,
520 "COM reset failed\n");
522 mtip_init_port(port
);
523 mtip_start_port(port
);
528 * Helper function for tag logging
530 static void print_tags(struct driver_data
*dd
,
532 unsigned long *tagbits
,
535 unsigned char tagmap
[128];
536 int group
, tagmap_len
= 0;
538 memset(tagmap
, 0, sizeof(tagmap
));
539 for (group
= SLOTBITS_IN_LONGS
; group
> 0; group
--)
540 tagmap_len
= sprintf(tagmap
+ tagmap_len
, "%016lX ",
542 dev_warn(&dd
->pdev
->dev
,
543 "%d command(s) %s: tagmap [%s]", cnt
, msg
, tagmap
);
547 * Called periodically to see if any read/write commands are
548 * taking too long to complete.
550 * @data Pointer to the PORT data structure.
555 static void mtip_timeout_function(unsigned long int data
)
557 struct mtip_port
*port
= (struct mtip_port
*) data
;
558 struct host_to_dev_fis
*fis
;
559 struct mtip_cmd
*command
;
560 int tag
, cmdto_cnt
= 0;
561 unsigned int bit
, group
;
562 unsigned int num_command_slots
= port
->dd
->slot_groups
* 32;
563 unsigned long to
, tagaccum
[SLOTBITS_IN_LONGS
];
568 if (test_bit(MTIP_DDF_RESUME_BIT
, &port
->dd
->dd_flag
)) {
569 mod_timer(&port
->cmd_timer
,
570 jiffies
+ msecs_to_jiffies(30000));
573 /* clear the tag accumulator */
574 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
576 for (tag
= 0; tag
< num_command_slots
; tag
++) {
578 * Skip internal command slot as it has
579 * its own timeout mechanism
581 if (tag
== MTIP_TAG_INTERNAL
)
584 if (atomic_read(&port
->commands
[tag
].active
) &&
585 (time_after(jiffies
, port
->commands
[tag
].comp_time
))) {
589 command
= &port
->commands
[tag
];
590 fis
= (struct host_to_dev_fis
*) command
->command
;
592 set_bit(tag
, tagaccum
);
595 set_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
598 * Clear the completed bit. This should prevent
599 * any interrupt handlers from trying to retire
602 writel(1 << bit
, port
->completed
[group
]);
604 /* Call the async completion callback. */
605 if (likely(command
->async_callback
))
606 command
->async_callback(command
->async_data
,
608 command
->async_callback
= NULL
;
609 command
->comp_func
= NULL
;
611 /* Unmap the DMA scatter list entries */
612 dma_unmap_sg(&port
->dd
->pdev
->dev
,
614 command
->scatter_ents
,
618 * Clear the allocated bit and active tag for the
621 atomic_set(&port
->commands
[tag
].active
, 0);
622 release_slot(port
, tag
);
628 if (cmdto_cnt
&& !test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
)) {
629 print_tags(port
->dd
, "timed out", tagaccum
, cmdto_cnt
);
631 mtip_restart_port(port
);
632 clear_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
633 wake_up_interruptible(&port
->svc_wait
);
636 if (port
->ic_pause_timer
) {
637 to
= port
->ic_pause_timer
+ msecs_to_jiffies(1000);
638 if (time_after(jiffies
, to
)) {
639 if (!test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
)) {
640 port
->ic_pause_timer
= 0;
641 clear_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
642 clear_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
643 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
644 wake_up_interruptible(&port
->svc_wait
);
651 /* Restart the timer */
652 mod_timer(&port
->cmd_timer
,
653 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
657 * IO completion function.
659 * This completion function is called by the driver ISR when a
660 * command that was issued by the kernel completes. It first calls the
661 * asynchronous completion function which normally calls back into the block
662 * layer passing the asynchronous callback data, then unmaps the
663 * scatter list associated with the completed command, and finally
664 * clears the allocated bit associated with the completed command.
666 * @port Pointer to the port data structure.
667 * @tag Tag of the command.
668 * @data Pointer to driver_data.
669 * @status Completion status.
674 static void mtip_async_complete(struct mtip_port
*port
,
679 struct mtip_cmd
*command
;
680 struct driver_data
*dd
= data
;
681 int cb_status
= status
? -EIO
: 0;
683 if (unlikely(!dd
) || unlikely(!port
))
686 command
= &port
->commands
[tag
];
688 if (unlikely(status
== PORT_IRQ_TF_ERR
)) {
689 dev_warn(&port
->dd
->pdev
->dev
,
690 "Command tag %d failed due to TFE\n", tag
);
693 /* Upper layer callback */
694 if (likely(command
->async_callback
))
695 command
->async_callback(command
->async_data
, cb_status
);
697 command
->async_callback
= NULL
;
698 command
->comp_func
= NULL
;
700 /* Unmap the DMA scatter list entries */
701 dma_unmap_sg(&dd
->pdev
->dev
,
703 command
->scatter_ents
,
706 /* Clear the allocated and active bits for the command */
707 atomic_set(&port
->commands
[tag
].active
, 0);
708 release_slot(port
, tag
);
714 * Internal command completion callback function.
716 * This function is normally called by the driver ISR when an internal
717 * command completed. This function signals the command completion by
718 * calling complete().
720 * @port Pointer to the port data structure.
721 * @tag Tag of the command that has completed.
722 * @data Pointer to a completion structure.
723 * @status Completion status.
728 static void mtip_completion(struct mtip_port
*port
,
733 struct mtip_cmd
*command
= &port
->commands
[tag
];
734 struct completion
*waiting
= data
;
735 if (unlikely(status
== PORT_IRQ_TF_ERR
))
736 dev_warn(&port
->dd
->pdev
->dev
,
737 "Internal command %d completed with TFE\n", tag
);
739 command
->async_callback
= NULL
;
740 command
->comp_func
= NULL
;
745 static void mtip_null_completion(struct mtip_port
*port
,
753 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
754 dma_addr_t buffer_dma
, unsigned int sectors
);
755 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
756 struct smart_attr
*attrib
);
760 * @dd Pointer to the DRIVER_DATA structure.
765 static void mtip_handle_tfe(struct driver_data
*dd
)
767 int group
, tag
, bit
, reissue
, rv
;
768 struct mtip_port
*port
;
769 struct mtip_cmd
*cmd
;
771 struct host_to_dev_fis
*fis
;
772 unsigned long tagaccum
[SLOTBITS_IN_LONGS
];
773 unsigned int cmd_cnt
= 0;
775 char *fail_reason
= NULL
;
776 int fail_all_ncq_write
= 0, fail_all_ncq_cmds
= 0;
778 dev_warn(&dd
->pdev
->dev
, "Taskfile error\n");
782 /* Stop the timer to prevent command timeouts. */
783 del_timer(&port
->cmd_timer
);
784 set_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
786 if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
) &&
787 test_bit(MTIP_TAG_INTERNAL
, port
->allocated
)) {
788 cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
789 dbg_printk(MTIP_DRV_NAME
" TFE for the internal command\n");
791 atomic_inc(&cmd
->active
); /* active > 1 indicates error */
792 if (cmd
->comp_data
&& cmd
->comp_func
) {
793 cmd
->comp_func(port
, MTIP_TAG_INTERNAL
,
794 cmd
->comp_data
, PORT_IRQ_TF_ERR
);
796 goto handle_tfe_exit
;
799 /* clear the tag accumulator */
800 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
802 /* Loop through all the groups */
803 for (group
= 0; group
< dd
->slot_groups
; group
++) {
804 completed
= readl(port
->completed
[group
]);
806 /* clear completed status register in the hardware.*/
807 writel(completed
, port
->completed
[group
]);
809 /* Process successfully completed commands */
810 for (bit
= 0; bit
< 32 && completed
; bit
++) {
811 if (!(completed
& (1<<bit
)))
813 tag
= (group
<< 5) + bit
;
815 /* Skip the internal command slot */
816 if (tag
== MTIP_TAG_INTERNAL
)
819 cmd
= &port
->commands
[tag
];
820 if (likely(cmd
->comp_func
)) {
821 set_bit(tag
, tagaccum
);
823 atomic_set(&cmd
->active
, 0);
829 dev_err(&port
->dd
->pdev
->dev
,
830 "Missing completion func for tag %d",
832 if (mtip_check_surprise_removal(dd
->pdev
)) {
833 mtip_command_cleanup(dd
);
834 /* don't proceed further */
841 print_tags(dd
, "completed (TFE)", tagaccum
, cmd_cnt
);
843 /* Restart the port */
845 mtip_restart_port(port
);
847 /* Trying to determine the cause of the error */
848 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
850 dd
->port
->log_buf_dma
, 1);
852 dev_warn(&dd
->pdev
->dev
,
853 "Error in READ LOG EXT (10h) command\n");
854 /* non-critical error, don't fail the load */
856 buf
= (unsigned char *)dd
->port
->log_buf
;
857 if (buf
[259] & 0x1) {
858 dev_info(&dd
->pdev
->dev
,
859 "Write protect bit is set.\n");
860 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
861 fail_all_ncq_write
= 1;
862 fail_reason
= "write protect";
864 if (buf
[288] == 0xF7) {
865 dev_info(&dd
->pdev
->dev
,
866 "Exceeded Tmax, drive in thermal shutdown.\n");
867 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
868 fail_all_ncq_cmds
= 1;
869 fail_reason
= "thermal shutdown";
871 if (buf
[288] == 0xBF) {
872 dev_info(&dd
->pdev
->dev
,
873 "Drive indicates rebuild has failed.\n");
874 fail_all_ncq_cmds
= 1;
875 fail_reason
= "rebuild failed";
879 /* clear the tag accumulator */
880 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
882 /* Loop through all the groups */
883 for (group
= 0; group
< dd
->slot_groups
; group
++) {
884 for (bit
= 0; bit
< 32; bit
++) {
886 tag
= (group
<< 5) + bit
;
887 cmd
= &port
->commands
[tag
];
889 /* If the active bit is set re-issue the command */
890 if (atomic_read(&cmd
->active
) == 0)
893 fis
= (struct host_to_dev_fis
*)cmd
->command
;
895 /* Should re-issue? */
896 if (tag
== MTIP_TAG_INTERNAL
||
897 fis
->command
== ATA_CMD_SET_FEATURES
)
900 if (fail_all_ncq_cmds
||
901 (fail_all_ncq_write
&&
902 fis
->command
== ATA_CMD_FPDMA_WRITE
)) {
903 dev_warn(&dd
->pdev
->dev
,
904 " Fail: %s w/tag %d [%s].\n",
905 fis
->command
== ATA_CMD_FPDMA_WRITE
?
908 fail_reason
!= NULL
?
909 fail_reason
: "unknown");
910 atomic_set(&cmd
->active
, 0);
911 if (cmd
->comp_func
) {
912 cmd
->comp_func(port
, tag
,
921 * First check if this command has
922 * exceeded its retries.
924 if (reissue
&& (cmd
->retries
-- > 0)) {
926 set_bit(tag
, tagaccum
);
928 /* Re-issue the command. */
929 mtip_issue_ncq_command(port
, tag
);
934 /* Retire a command that will not be reissued */
935 dev_warn(&port
->dd
->pdev
->dev
,
936 "retiring tag %d\n", tag
);
937 atomic_set(&cmd
->active
, 0);
946 dev_warn(&port
->dd
->pdev
->dev
,
947 "Bad completion for tag %d\n",
951 print_tags(dd
, "reissued (TFE)", tagaccum
, cmd_cnt
);
954 /* clear eh_active */
955 clear_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
956 wake_up_interruptible(&port
->svc_wait
);
958 mod_timer(&port
->cmd_timer
,
959 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
963 * Handle a set device bits interrupt
965 static inline void mtip_process_sdbf(struct driver_data
*dd
)
967 struct mtip_port
*port
= dd
->port
;
970 struct mtip_cmd
*command
;
972 /* walk all bits in all slot groups */
973 for (group
= 0; group
< dd
->slot_groups
; group
++) {
974 completed
= readl(port
->completed
[group
]);
978 /* clear completed status register in the hardware.*/
979 writel(completed
, port
->completed
[group
]);
981 /* Process completed commands. */
983 (bit
< 32) && completed
;
984 bit
++, completed
>>= 1) {
985 if (completed
& 0x01) {
986 tag
= (group
<< 5) | bit
;
988 /* skip internal command slot. */
989 if (unlikely(tag
== MTIP_TAG_INTERNAL
))
992 command
= &port
->commands
[tag
];
993 /* make internal callback */
994 if (likely(command
->comp_func
)) {
1001 dev_warn(&dd
->pdev
->dev
,
1006 if (mtip_check_surprise_removal(
1008 mtip_command_cleanup(dd
);
1018 * Process legacy pio and d2h interrupts
1020 static inline void mtip_process_legacy(struct driver_data
*dd
, u32 port_stat
)
1022 struct mtip_port
*port
= dd
->port
;
1023 struct mtip_cmd
*cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
1025 if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
) &&
1026 (cmd
!= NULL
) && !(readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1027 & (1 << MTIP_TAG_INTERNAL
))) {
1028 if (cmd
->comp_func
) {
1029 cmd
->comp_func(port
,
1041 * Demux and handle errors
1043 static inline void mtip_process_errors(struct driver_data
*dd
, u32 port_stat
)
1045 if (likely(port_stat
& (PORT_IRQ_TF_ERR
| PORT_IRQ_IF_ERR
)))
1046 mtip_handle_tfe(dd
);
1048 if (unlikely(port_stat
& PORT_IRQ_CONNECT
)) {
1049 dev_warn(&dd
->pdev
->dev
,
1050 "Clearing PxSERR.DIAG.x\n");
1051 writel((1 << 26), dd
->port
->mmio
+ PORT_SCR_ERR
);
1054 if (unlikely(port_stat
& PORT_IRQ_PHYRDY
)) {
1055 dev_warn(&dd
->pdev
->dev
,
1056 "Clearing PxSERR.DIAG.n\n");
1057 writel((1 << 16), dd
->port
->mmio
+ PORT_SCR_ERR
);
1060 if (unlikely(port_stat
& ~PORT_IRQ_HANDLED
)) {
1061 dev_warn(&dd
->pdev
->dev
,
1062 "Port stat errors %x unhandled\n",
1063 (port_stat
& ~PORT_IRQ_HANDLED
));
1067 static inline irqreturn_t
mtip_handle_irq(struct driver_data
*data
)
1069 struct driver_data
*dd
= (struct driver_data
*) data
;
1070 struct mtip_port
*port
= dd
->port
;
1071 u32 hba_stat
, port_stat
;
1074 hba_stat
= readl(dd
->mmio
+ HOST_IRQ_STAT
);
1078 /* Acknowledge the interrupt status on the port.*/
1079 port_stat
= readl(port
->mmio
+ PORT_IRQ_STAT
);
1080 writel(port_stat
, port
->mmio
+ PORT_IRQ_STAT
);
1082 /* Demux port status */
1083 if (likely(port_stat
& PORT_IRQ_SDB_FIS
))
1084 mtip_process_sdbf(dd
);
1086 if (unlikely(port_stat
& PORT_IRQ_ERR
)) {
1087 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
1088 mtip_command_cleanup(dd
);
1089 /* don't proceed further */
1092 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1096 mtip_process_errors(dd
, port_stat
& PORT_IRQ_ERR
);
1099 if (unlikely(port_stat
& PORT_IRQ_LEGACY
))
1100 mtip_process_legacy(dd
, port_stat
& PORT_IRQ_LEGACY
);
1103 /* acknowledge interrupt */
1104 writel(hba_stat
, dd
->mmio
+ HOST_IRQ_STAT
);
1110 * Wrapper for mtip_handle_irq
1111 * (ignores return code)
1113 static void mtip_tasklet(unsigned long data
)
1115 mtip_handle_irq((struct driver_data
*) data
);
1119 * HBA interrupt subroutine.
1122 * @instance Pointer to the driver data structure.
1125 * IRQ_HANDLED A HBA interrupt was pending and handled.
1126 * IRQ_NONE This interrupt was not for the HBA.
1128 static irqreturn_t
mtip_irq_handler(int irq
, void *instance
)
1130 struct driver_data
*dd
= instance
;
1131 tasklet_schedule(&dd
->tasklet
);
1135 static void mtip_issue_non_ncq_command(struct mtip_port
*port
, int tag
)
1137 atomic_set(&port
->commands
[tag
].active
, 1);
1138 writel(1 << MTIP_TAG_BIT(tag
),
1139 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
1142 static bool mtip_pause_ncq(struct mtip_port
*port
,
1143 struct host_to_dev_fis
*fis
)
1145 struct host_to_dev_fis
*reply
;
1146 unsigned long task_file_data
;
1148 reply
= port
->rxfis
+ RX_FIS_D2H_REG
;
1149 task_file_data
= readl(port
->mmio
+PORT_TFDATA
);
1151 if ((task_file_data
& 1) || (fis
->command
== ATA_CMD_SEC_ERASE_UNIT
))
1154 if (fis
->command
== ATA_CMD_SEC_ERASE_PREP
) {
1155 set_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1156 port
->ic_pause_timer
= jiffies
;
1158 } else if ((fis
->command
== ATA_CMD_DOWNLOAD_MICRO
) &&
1159 (fis
->features
== 0x03)) {
1160 set_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1161 port
->ic_pause_timer
= jiffies
;
1163 } else if ((fis
->command
== ATA_CMD_SEC_ERASE_UNIT
) ||
1164 ((fis
->command
== 0xFC) &&
1165 (fis
->features
== 0x27 || fis
->features
== 0x72 ||
1166 fis
->features
== 0x62 || fis
->features
== 0x26))) {
1167 /* Com reset after secure erase or lowlevel format */
1168 mtip_restart_port(port
);
1176 * Wait for port to quiesce
1178 * @port Pointer to port data structure
1179 * @timeout Max duration to wait (ms)
1183 * -EBUSY Commands still active
1185 static int mtip_quiesce_io(struct mtip_port
*port
, unsigned long timeout
)
1189 unsigned int active
= 1;
1191 to
= jiffies
+ msecs_to_jiffies(timeout
);
1193 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
) &&
1194 test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
1196 continue; /* svc thd is actively issuing commands */
1198 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1201 * Ignore s_active bit 0 of array element 0.
1202 * This bit will always be set
1204 active
= readl(port
->s_active
[0]) & 0xFFFFFFFE;
1205 for (n
= 1; n
< port
->dd
->slot_groups
; n
++)
1206 active
|= readl(port
->s_active
[n
]);
1212 } while (time_before(jiffies
, to
));
1214 return active
? -EBUSY
: 0;
1218 * Execute an internal command and wait for the completion.
1220 * @port Pointer to the port data structure.
1221 * @fis Pointer to the FIS that describes the command.
1222 * @fis_len Length in WORDS of the FIS.
1223 * @buffer DMA accessible for command data.
1224 * @buf_len Length, in bytes, of the data buffer.
1225 * @opts Command header options, excluding the FIS length
1226 * and the number of PRD entries.
1227 * @timeout Time in ms to wait for the command to complete.
1230 * 0 Command completed successfully.
1231 * -EFAULT The buffer address is not correctly aligned.
1232 * -EBUSY Internal command or other IO in progress.
1233 * -EAGAIN Time out waiting for command to complete.
1235 static int mtip_exec_internal_command(struct mtip_port
*port
,
1236 struct host_to_dev_fis
*fis
,
1242 unsigned long timeout
)
1244 struct mtip_cmd_sg
*command_sg
;
1245 DECLARE_COMPLETION_ONSTACK(wait
);
1246 int rv
= 0, ready2go
= 1;
1247 struct mtip_cmd
*int_cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
1250 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
1251 if (buffer
& 0x00000007) {
1252 dev_err(&port
->dd
->pdev
->dev
,
1253 "SG buffer is not 8 byte aligned\n");
1257 to
= jiffies
+ msecs_to_jiffies(timeout
);
1259 ready2go
= !test_and_set_bit(MTIP_TAG_INTERNAL
,
1264 } while (time_before(jiffies
, to
));
1266 dev_warn(&port
->dd
->pdev
->dev
,
1267 "Internal cmd active. new cmd [%02X]\n", fis
->command
);
1270 set_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1271 port
->ic_pause_timer
= 0;
1273 if (fis
->command
== ATA_CMD_SEC_ERASE_UNIT
)
1274 clear_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1275 else if (fis
->command
== ATA_CMD_DOWNLOAD_MICRO
)
1276 clear_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1278 if (atomic
== GFP_KERNEL
) {
1279 if (fis
->command
!= ATA_CMD_STANDBYNOW1
) {
1280 /* wait for io to complete if non atomic */
1281 if (mtip_quiesce_io(port
, 5000) < 0) {
1282 dev_warn(&port
->dd
->pdev
->dev
,
1283 "Failed to quiesce IO\n");
1284 release_slot(port
, MTIP_TAG_INTERNAL
);
1285 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1286 wake_up_interruptible(&port
->svc_wait
);
1291 /* Set the completion function and data for the command. */
1292 int_cmd
->comp_data
= &wait
;
1293 int_cmd
->comp_func
= mtip_completion
;
1296 /* Clear completion - we're going to poll */
1297 int_cmd
->comp_data
= NULL
;
1298 int_cmd
->comp_func
= mtip_null_completion
;
1301 /* Copy the command to the command table */
1302 memcpy(int_cmd
->command
, fis
, fis_len
*4);
1304 /* Populate the SG list */
1305 int_cmd
->command_header
->opts
=
1306 __force_bit2int
cpu_to_le32(opts
| fis_len
);
1308 command_sg
= int_cmd
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1311 __force_bit2int
cpu_to_le32((buf_len
-1) & 0x3FFFFF);
1313 __force_bit2int
cpu_to_le32(buffer
& 0xFFFFFFFF);
1314 command_sg
->dba_upper
=
1315 __force_bit2int
cpu_to_le32((buffer
>> 16) >> 16);
1317 int_cmd
->command_header
->opts
|=
1318 __force_bit2int
cpu_to_le32((1 << 16));
1321 /* Populate the command header */
1322 int_cmd
->command_header
->byte_count
= 0;
1324 /* Issue the command to the hardware */
1325 mtip_issue_non_ncq_command(port
, MTIP_TAG_INTERNAL
);
1327 /* Poll if atomic, wait_for_completion otherwise */
1328 if (atomic
== GFP_KERNEL
) {
1329 /* Wait for the command to complete or timeout. */
1330 if (wait_for_completion_timeout(
1332 msecs_to_jiffies(timeout
)) == 0) {
1333 dev_err(&port
->dd
->pdev
->dev
,
1334 "Internal command did not complete [%d] "
1335 "within timeout of %lu ms\n",
1337 if (mtip_check_surprise_removal(port
->dd
->pdev
) ||
1338 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1339 &port
->dd
->dd_flag
)) {
1346 /* Spin for <timeout> checking if command still outstanding */
1347 timeout
= jiffies
+ msecs_to_jiffies(timeout
);
1348 while ((readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1349 & (1 << MTIP_TAG_INTERNAL
))
1350 && time_before(jiffies
, timeout
)) {
1351 if (mtip_check_surprise_removal(port
->dd
->pdev
)) {
1355 if ((fis
->command
!= ATA_CMD_STANDBYNOW1
) &&
1356 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1357 &port
->dd
->dd_flag
)) {
1361 if (readl(port
->mmio
+ PORT_IRQ_STAT
) & PORT_IRQ_ERR
) {
1362 atomic_inc(&int_cmd
->active
); /* error */
1368 if (atomic_read(&int_cmd
->active
) > 1) {
1369 dev_err(&port
->dd
->pdev
->dev
,
1370 "Internal command [%02X] failed\n", fis
->command
);
1373 if (readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1374 & (1 << MTIP_TAG_INTERNAL
)) {
1376 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1377 &port
->dd
->dd_flag
)) {
1378 mtip_restart_port(port
);
1383 /* Clear the allocated and active bits for the internal command. */
1384 atomic_set(&int_cmd
->active
, 0);
1385 release_slot(port
, MTIP_TAG_INTERNAL
);
1386 if (rv
>= 0 && mtip_pause_ncq(port
, fis
)) {
1390 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1391 wake_up_interruptible(&port
->svc_wait
);
1397 * Byte-swap ATA ID strings.
1399 * ATA identify data contains strings in byte-swapped 16-bit words.
1400 * They must be swapped (on all architectures) to be usable as C strings.
1401 * This function swaps bytes in-place.
1403 * @buf The buffer location of the string
1404 * @len The number of bytes to swap
1409 static inline void ata_swap_string(u16
*buf
, unsigned int len
)
1412 for (i
= 0; i
< (len
/2); i
++)
1413 be16_to_cpus(&buf
[i
]);
1417 * Request the device identity information.
1419 * If a user space buffer is not specified, i.e. is NULL, the
1420 * identify information is still read from the drive and placed
1421 * into the identify data buffer (@e port->identify) in the
1422 * port data structure.
1423 * When the identify buffer contains valid identify information @e
1424 * port->identify_valid is non-zero.
1426 * @port Pointer to the port structure.
1427 * @user_buffer A user space buffer where the identify data should be
1431 * 0 Command completed successfully.
1432 * -EFAULT An error occurred while coping data to the user buffer.
1433 * -1 Command failed.
1435 static int mtip_get_identify(struct mtip_port
*port
, void __user
*user_buffer
)
1438 struct host_to_dev_fis fis
;
1440 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1443 /* Build the FIS. */
1444 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1447 fis
.command
= ATA_CMD_ID_ATA
;
1449 /* Set the identify information as invalid. */
1450 port
->identify_valid
= 0;
1452 /* Clear the identify information. */
1453 memset(port
->identify
, 0, sizeof(u16
) * ATA_ID_WORDS
);
1455 /* Execute the command. */
1456 if (mtip_exec_internal_command(port
,
1460 sizeof(u16
) * ATA_ID_WORDS
,
1463 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
)
1470 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1471 * perform field-sensitive swapping on the string fields.
1472 * See the kernel use of ata_id_string() for proof of this.
1474 #ifdef __LITTLE_ENDIAN
1475 ata_swap_string(port
->identify
+ 27, 40); /* model string*/
1476 ata_swap_string(port
->identify
+ 23, 8); /* firmware string*/
1477 ata_swap_string(port
->identify
+ 10, 20); /* serial# string*/
1481 for (i
= 0; i
< ATA_ID_WORDS
; i
++)
1482 port
->identify
[i
] = le16_to_cpu(port
->identify
[i
]);
1486 /* Set the identify buffer as valid. */
1487 port
->identify_valid
= 1;
1493 ATA_ID_WORDS
* sizeof(u16
))) {
1504 * Issue a standby immediate command to the device.
1506 * @port Pointer to the port structure.
1509 * 0 Command was executed successfully.
1510 * -1 An error occurred while executing the command.
1512 static int mtip_standby_immediate(struct mtip_port
*port
)
1515 struct host_to_dev_fis fis
;
1516 unsigned long start
;
1518 /* Build the FIS. */
1519 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1522 fis
.command
= ATA_CMD_STANDBYNOW1
;
1525 rv
= mtip_exec_internal_command(port
,
1533 dbg_printk(MTIP_DRV_NAME
"Time taken to complete standby cmd: %d ms\n",
1534 jiffies_to_msecs(jiffies
- start
));
1536 dev_warn(&port
->dd
->pdev
->dev
,
1537 "STANDBY IMMEDIATE command failed.\n");
1543 * Issue a READ LOG EXT command to the device.
1545 * @port pointer to the port structure.
1546 * @page page number to fetch
1547 * @buffer pointer to buffer
1548 * @buffer_dma dma address corresponding to @buffer
1549 * @sectors page length to fetch, in sectors
1552 * @rv return value from mtip_exec_internal_command()
1554 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
1555 dma_addr_t buffer_dma
, unsigned int sectors
)
1557 struct host_to_dev_fis fis
;
1559 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1562 fis
.command
= ATA_CMD_READ_LOG_EXT
;
1563 fis
.sect_count
= sectors
& 0xFF;
1564 fis
.sect_cnt_ex
= (sectors
>> 8) & 0xFF;
1567 fis
.device
= ATA_DEVICE_OBS
;
1569 memset(buffer
, 0, sectors
* ATA_SECT_SIZE
);
1571 return mtip_exec_internal_command(port
,
1575 sectors
* ATA_SECT_SIZE
,
1578 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
);
1582 * Issue a SMART READ DATA command to the device.
1584 * @port pointer to the port structure.
1585 * @buffer pointer to buffer
1586 * @buffer_dma dma address corresponding to @buffer
1589 * @rv return value from mtip_exec_internal_command()
1591 static int mtip_get_smart_data(struct mtip_port
*port
, u8
*buffer
,
1592 dma_addr_t buffer_dma
)
1594 struct host_to_dev_fis fis
;
1596 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1599 fis
.command
= ATA_CMD_SMART
;
1600 fis
.features
= 0xD0;
1604 fis
.device
= ATA_DEVICE_OBS
;
1606 return mtip_exec_internal_command(port
,
1617 * Get the value of a smart attribute
1619 * @port pointer to the port structure
1620 * @id attribute number
1621 * @attrib pointer to return attrib information corresponding to @id
1624 * -EINVAL NULL buffer passed or unsupported attribute @id.
1625 * -EPERM Identify data not valid, SMART not supported or not enabled
1627 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
1628 struct smart_attr
*attrib
)
1631 struct smart_attr
*pattr
;
1636 if (!port
->identify_valid
) {
1637 dev_warn(&port
->dd
->pdev
->dev
, "IDENTIFY DATA not valid\n");
1640 if (!(port
->identify
[82] & 0x1)) {
1641 dev_warn(&port
->dd
->pdev
->dev
, "SMART not supported\n");
1644 if (!(port
->identify
[85] & 0x1)) {
1645 dev_warn(&port
->dd
->pdev
->dev
, "SMART not enabled\n");
1649 memset(port
->smart_buf
, 0, ATA_SECT_SIZE
);
1650 rv
= mtip_get_smart_data(port
, port
->smart_buf
, port
->smart_buf_dma
);
1652 dev_warn(&port
->dd
->pdev
->dev
, "Failed to ge SMART data\n");
1656 pattr
= (struct smart_attr
*)(port
->smart_buf
+ 2);
1657 for (i
= 0; i
< 29; i
++, pattr
++)
1658 if (pattr
->attr_id
== id
) {
1659 memcpy(attrib
, pattr
, sizeof(struct smart_attr
));
1664 dev_warn(&port
->dd
->pdev
->dev
,
1665 "Query for invalid SMART attribute ID\n");
1673 * Get the drive capacity.
1675 * @dd Pointer to the device data structure.
1676 * @sectors Pointer to the variable that will receive the sector count.
1679 * 1 Capacity was returned successfully.
1680 * 0 The identify information is invalid.
1682 static bool mtip_hw_get_capacity(struct driver_data
*dd
, sector_t
*sectors
)
1684 struct mtip_port
*port
= dd
->port
;
1685 u64 total
, raw0
, raw1
, raw2
, raw3
;
1686 raw0
= port
->identify
[100];
1687 raw1
= port
->identify
[101];
1688 raw2
= port
->identify
[102];
1689 raw3
= port
->identify
[103];
1690 total
= raw0
| raw1
<<16 | raw2
<<32 | raw3
<<48;
1692 return (bool) !!port
->identify_valid
;
1698 * Resets the HBA by setting the HBA Reset bit in the Global
1699 * HBA Control register. After setting the HBA Reset bit the
1700 * function waits for 1 second before reading the HBA Reset
1701 * bit to make sure it has cleared. If HBA Reset is not clear
1702 * an error is returned. Cannot be used in non-blockable
1705 * @dd Pointer to the driver data structure.
1708 * 0 The reset was successful.
1709 * -1 The HBA Reset bit did not clear.
1711 static int mtip_hba_reset(struct driver_data
*dd
)
1713 mtip_deinit_port(dd
->port
);
1715 /* Set the reset bit */
1716 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
1719 readl(dd
->mmio
+ HOST_CTL
);
1721 /* Wait for reset to clear */
1724 /* Check the bit has cleared */
1725 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
) {
1726 dev_err(&dd
->pdev
->dev
,
1727 "Reset bit did not clear.\n");
1735 * Display the identify command data.
1737 * @port Pointer to the port data structure.
1742 static void mtip_dump_identify(struct mtip_port
*port
)
1745 unsigned short revid
;
1748 if (!port
->identify_valid
)
1751 strlcpy(cbuf
, (char *)(port
->identify
+10), 21);
1752 dev_info(&port
->dd
->pdev
->dev
,
1753 "Serial No.: %s\n", cbuf
);
1755 strlcpy(cbuf
, (char *)(port
->identify
+23), 9);
1756 dev_info(&port
->dd
->pdev
->dev
,
1757 "Firmware Ver.: %s\n", cbuf
);
1759 strlcpy(cbuf
, (char *)(port
->identify
+27), 41);
1760 dev_info(&port
->dd
->pdev
->dev
, "Model: %s\n", cbuf
);
1762 if (mtip_hw_get_capacity(port
->dd
, §ors
))
1763 dev_info(&port
->dd
->pdev
->dev
,
1764 "Capacity: %llu sectors (%llu MB)\n",
1766 ((u64
)sectors
) * ATA_SECT_SIZE
>> 20);
1768 pci_read_config_word(port
->dd
->pdev
, PCI_REVISION_ID
, &revid
);
1769 switch (revid
& 0xFF) {
1771 strlcpy(cbuf
, "A0", 3);
1774 strlcpy(cbuf
, "A2", 3);
1777 strlcpy(cbuf
, "?", 2);
1780 dev_info(&port
->dd
->pdev
->dev
,
1781 "Card Type: %s\n", cbuf
);
1785 * Map the commands scatter list into the command table.
1787 * @command Pointer to the command.
1788 * @nents Number of scatter list entries.
1793 static inline void fill_command_sg(struct driver_data
*dd
,
1794 struct mtip_cmd
*command
,
1798 unsigned int dma_len
;
1799 struct mtip_cmd_sg
*command_sg
;
1800 struct scatterlist
*sg
= command
->sg
;
1802 command_sg
= command
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1804 for (n
= 0; n
< nents
; n
++) {
1805 dma_len
= sg_dma_len(sg
);
1806 if (dma_len
> 0x400000)
1807 dev_err(&dd
->pdev
->dev
,
1808 "DMA segment length truncated\n");
1809 command_sg
->info
= __force_bit2int
1810 cpu_to_le32((dma_len
-1) & 0x3FFFFF);
1811 command_sg
->dba
= __force_bit2int
1812 cpu_to_le32(sg_dma_address(sg
));
1813 command_sg
->dba_upper
= __force_bit2int
1814 cpu_to_le32((sg_dma_address(sg
) >> 16) >> 16);
1821 * @brief Execute a drive command.
1823 * return value 0 The command completed successfully.
1824 * return value -1 An error occurred while executing the command.
1826 static int exec_drive_task(struct mtip_port
*port
, u8
*command
)
1828 struct host_to_dev_fis fis
;
1829 struct host_to_dev_fis
*reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1831 /* Build the FIS. */
1832 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1835 fis
.command
= command
[0];
1836 fis
.features
= command
[1];
1837 fis
.sect_count
= command
[2];
1838 fis
.sector
= command
[3];
1839 fis
.cyl_low
= command
[4];
1840 fis
.cyl_hi
= command
[5];
1841 fis
.device
= command
[6] & ~0x10; /* Clear the dev bit*/
1843 dbg_printk(MTIP_DRV_NAME
" %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
1853 /* Execute the command. */
1854 if (mtip_exec_internal_command(port
,
1861 MTIP_IOCTL_COMMAND_TIMEOUT_MS
) < 0) {
1865 command
[0] = reply
->command
; /* Status*/
1866 command
[1] = reply
->features
; /* Error*/
1867 command
[4] = reply
->cyl_low
;
1868 command
[5] = reply
->cyl_hi
;
1870 dbg_printk(MTIP_DRV_NAME
" %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
1881 * @brief Execute a drive command.
1883 * @param port Pointer to the port data structure.
1884 * @param command Pointer to the user specified command parameters.
1885 * @param user_buffer Pointer to the user space buffer where read sector
1886 * data should be copied.
1888 * return value 0 The command completed successfully.
1889 * return value -EFAULT An error occurred while copying the completion
1890 * data to the user space buffer.
1891 * return value -1 An error occurred while executing the command.
1893 static int exec_drive_command(struct mtip_port
*port
, u8
*command
,
1894 void __user
*user_buffer
)
1896 struct host_to_dev_fis fis
;
1897 struct host_to_dev_fis
*reply
;
1899 dma_addr_t dma_addr
= 0;
1900 int rv
= 0, xfer_sz
= command
[3];
1906 buf
= dmam_alloc_coherent(&port
->dd
->pdev
->dev
,
1907 ATA_SECT_SIZE
* xfer_sz
,
1911 dev_err(&port
->dd
->pdev
->dev
,
1912 "Memory allocation failed (%d bytes)\n",
1913 ATA_SECT_SIZE
* xfer_sz
);
1916 memset(buf
, 0, ATA_SECT_SIZE
* xfer_sz
);
1919 /* Build the FIS. */
1920 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1923 fis
.command
= command
[0];
1924 fis
.features
= command
[2];
1925 fis
.sect_count
= command
[3];
1926 if (fis
.command
== ATA_CMD_SMART
) {
1927 fis
.sector
= command
[1];
1933 reply
= (port
->rxfis
+ RX_FIS_PIO_SETUP
);
1935 reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1937 dbg_printk(MTIP_DRV_NAME
1938 " %s: User Command: cmd %x, sect %x, "
1939 "feat %x, sectcnt %x\n",
1946 /* Execute the command. */
1947 if (mtip_exec_internal_command(port
,
1950 (xfer_sz
? dma_addr
: 0),
1951 (xfer_sz
? ATA_SECT_SIZE
* xfer_sz
: 0),
1954 MTIP_IOCTL_COMMAND_TIMEOUT_MS
)
1957 goto exit_drive_command
;
1960 /* Collect the completion status. */
1961 command
[0] = reply
->command
; /* Status*/
1962 command
[1] = reply
->features
; /* Error*/
1963 command
[2] = reply
->sect_count
;
1965 dbg_printk(MTIP_DRV_NAME
1966 " %s: Completion Status: stat %x, "
1967 "err %x, nsect %x\n",
1974 if (copy_to_user(user_buffer
,
1976 ATA_SECT_SIZE
* command
[3])) {
1978 goto exit_drive_command
;
1983 dmam_free_coherent(&port
->dd
->pdev
->dev
,
1984 ATA_SECT_SIZE
* xfer_sz
, buf
, dma_addr
);
1989 * Indicates whether a command has a single sector payload.
1991 * @command passed to the device to perform the certain event.
1992 * @features passed to the device to perform the certain event.
1995 * 1 command is one that always has a single sector payload,
1996 * regardless of the value in the Sector Count field.
2000 static unsigned int implicit_sector(unsigned char command
,
2001 unsigned char features
)
2003 unsigned int rv
= 0;
2005 /* list of commands that have an implicit sector count of 1 */
2007 case ATA_CMD_SEC_SET_PASS
:
2008 case ATA_CMD_SEC_UNLOCK
:
2009 case ATA_CMD_SEC_ERASE_PREP
:
2010 case ATA_CMD_SEC_ERASE_UNIT
:
2011 case ATA_CMD_SEC_FREEZE_LOCK
:
2012 case ATA_CMD_SEC_DISABLE_PASS
:
2013 case ATA_CMD_PMP_READ
:
2014 case ATA_CMD_PMP_WRITE
:
2017 case ATA_CMD_SET_MAX
:
2018 if (features
== ATA_SET_MAX_UNLOCK
)
2022 if ((features
== ATA_SMART_READ_VALUES
) ||
2023 (features
== ATA_SMART_READ_THRESHOLDS
))
2026 case ATA_CMD_CONF_OVERLAY
:
2027 if ((features
== ATA_DCO_IDENTIFY
) ||
2028 (features
== ATA_DCO_SET
))
2035 static void mtip_set_timeout(struct host_to_dev_fis
*fis
, unsigned int *timeout
)
2037 switch (fis
->command
) {
2038 case ATA_CMD_DOWNLOAD_MICRO
:
2039 *timeout
= 120000; /* 2 minutes */
2041 case ATA_CMD_SEC_ERASE_UNIT
:
2043 *timeout
= 240000; /* 4 minutes */
2045 case ATA_CMD_STANDBYNOW1
:
2046 *timeout
= 10000; /* 10 seconds */
2050 *timeout
= 60000; /* 60 seconds */
2053 *timeout
= 15000; /* 15 seconds */
2056 *timeout
= MTIP_IOCTL_COMMAND_TIMEOUT_MS
;
2062 * Executes a taskfile
2063 * See ide_taskfile_ioctl() for derivation
2065 static int exec_drive_taskfile(struct driver_data
*dd
,
2067 ide_task_request_t
*req_task
,
2070 struct host_to_dev_fis fis
;
2071 struct host_to_dev_fis
*reply
;
2074 dma_addr_t outbuf_dma
= 0;
2075 dma_addr_t inbuf_dma
= 0;
2076 dma_addr_t dma_buffer
= 0;
2078 unsigned int taskin
= 0;
2079 unsigned int taskout
= 0;
2081 unsigned int timeout
;
2082 unsigned int force_single_sector
;
2083 unsigned int transfer_size
;
2084 unsigned long task_file_data
;
2085 int intotal
= outtotal
+ req_task
->out_size
;
2087 taskout
= req_task
->out_size
;
2088 taskin
= req_task
->in_size
;
2089 /* 130560 = 512 * 0xFF*/
2090 if (taskin
> 130560 || taskout
> 130560) {
2096 outbuf
= kzalloc(taskout
, GFP_KERNEL
);
2097 if (outbuf
== NULL
) {
2101 if (copy_from_user(outbuf
, buf
+ outtotal
, taskout
)) {
2105 outbuf_dma
= pci_map_single(dd
->pdev
,
2109 if (outbuf_dma
== 0) {
2113 dma_buffer
= outbuf_dma
;
2117 inbuf
= kzalloc(taskin
, GFP_KERNEL
);
2118 if (inbuf
== NULL
) {
2123 if (copy_from_user(inbuf
, buf
+ intotal
, taskin
)) {
2127 inbuf_dma
= pci_map_single(dd
->pdev
,
2129 taskin
, DMA_FROM_DEVICE
);
2130 if (inbuf_dma
== 0) {
2134 dma_buffer
= inbuf_dma
;
2137 /* only supports PIO and non-data commands from this ioctl. */
2138 switch (req_task
->data_phase
) {
2140 nsect
= taskout
/ ATA_SECT_SIZE
;
2141 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2144 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2146 case TASKFILE_NO_DATA
:
2147 reply
= (dd
->port
->rxfis
+ RX_FIS_D2H_REG
);
2154 /* Build the FIS. */
2155 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
2159 fis
.command
= req_task
->io_ports
[7];
2160 fis
.features
= req_task
->io_ports
[1];
2161 fis
.sect_count
= req_task
->io_ports
[2];
2162 fis
.lba_low
= req_task
->io_ports
[3];
2163 fis
.lba_mid
= req_task
->io_ports
[4];
2164 fis
.lba_hi
= req_task
->io_ports
[5];
2165 /* Clear the dev bit*/
2166 fis
.device
= req_task
->io_ports
[6] & ~0x10;
2168 if ((req_task
->in_flags
.all
== 0) && (req_task
->out_flags
.all
& 1)) {
2169 req_task
->in_flags
.all
=
2170 IDE_TASKFILE_STD_IN_FLAGS
|
2171 (IDE_HOB_STD_IN_FLAGS
<< 8);
2172 fis
.lba_low_ex
= req_task
->hob_ports
[3];
2173 fis
.lba_mid_ex
= req_task
->hob_ports
[4];
2174 fis
.lba_hi_ex
= req_task
->hob_ports
[5];
2175 fis
.features_ex
= req_task
->hob_ports
[1];
2176 fis
.sect_cnt_ex
= req_task
->hob_ports
[2];
2179 req_task
->in_flags
.all
= IDE_TASKFILE_STD_IN_FLAGS
;
2182 force_single_sector
= implicit_sector(fis
.command
, fis
.features
);
2184 if ((taskin
|| taskout
) && (!fis
.sect_count
)) {
2186 fis
.sect_count
= nsect
;
2188 if (!force_single_sector
) {
2189 dev_warn(&dd
->pdev
->dev
,
2190 "data movement but "
2191 "sect_count is 0\n");
2198 dbg_printk(MTIP_DRV_NAME
2199 " %s: cmd %x, feat %x, nsect %x,"
2200 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
2211 mtip_set_timeout(&fis
, &timeout
);
2213 /* Determine the correct transfer size.*/
2214 if (force_single_sector
)
2215 transfer_size
= ATA_SECT_SIZE
;
2217 transfer_size
= ATA_SECT_SIZE
* fis
.sect_count
;
2219 /* Execute the command.*/
2220 if (mtip_exec_internal_command(dd
->port
,
2232 task_file_data
= readl(dd
->port
->mmio
+PORT_TFDATA
);
2234 if ((req_task
->data_phase
== TASKFILE_IN
) && !(task_file_data
& 1)) {
2235 reply
= dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
;
2236 req_task
->io_ports
[7] = reply
->control
;
2238 reply
= dd
->port
->rxfis
+ RX_FIS_D2H_REG
;
2239 req_task
->io_ports
[7] = reply
->command
;
2242 /* reclaim the DMA buffers.*/
2244 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2245 taskin
, DMA_FROM_DEVICE
);
2247 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2248 taskout
, DMA_TO_DEVICE
);
2252 /* return the ATA registers to the caller.*/
2253 req_task
->io_ports
[1] = reply
->features
;
2254 req_task
->io_ports
[2] = reply
->sect_count
;
2255 req_task
->io_ports
[3] = reply
->lba_low
;
2256 req_task
->io_ports
[4] = reply
->lba_mid
;
2257 req_task
->io_ports
[5] = reply
->lba_hi
;
2258 req_task
->io_ports
[6] = reply
->device
;
2260 if (req_task
->out_flags
.all
& 1) {
2262 req_task
->hob_ports
[3] = reply
->lba_low_ex
;
2263 req_task
->hob_ports
[4] = reply
->lba_mid_ex
;
2264 req_task
->hob_ports
[5] = reply
->lba_hi_ex
;
2265 req_task
->hob_ports
[1] = reply
->features_ex
;
2266 req_task
->hob_ports
[2] = reply
->sect_cnt_ex
;
2268 dbg_printk(MTIP_DRV_NAME
2269 " %s: Completion: stat %x,"
2270 "err %x, sect_cnt %x, lbalo %x,"
2271 "lbamid %x, lbahi %x, dev %x\n",
2273 req_task
->io_ports
[7],
2274 req_task
->io_ports
[1],
2275 req_task
->io_ports
[2],
2276 req_task
->io_ports
[3],
2277 req_task
->io_ports
[4],
2278 req_task
->io_ports
[5],
2279 req_task
->io_ports
[6]);
2282 if (copy_to_user(buf
+ outtotal
, outbuf
, taskout
)) {
2288 if (copy_to_user(buf
+ intotal
, inbuf
, taskin
)) {
2295 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2296 taskin
, DMA_FROM_DEVICE
);
2298 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2299 taskout
, DMA_TO_DEVICE
);
2307 * Handle IOCTL calls from the Block Layer.
2309 * This function is called by the Block Layer when it receives an IOCTL
2310 * command that it does not understand. If the IOCTL command is not supported
2311 * this function returns -ENOTTY.
2313 * @dd Pointer to the driver data structure.
2314 * @cmd IOCTL command passed from the Block Layer.
2315 * @arg IOCTL argument passed from the Block Layer.
2318 * 0 The IOCTL completed successfully.
2319 * -ENOTTY The specified command is not supported.
2320 * -EFAULT An error occurred copying data to a user space buffer.
2321 * -EIO An error occurred while executing the command.
2323 static int mtip_hw_ioctl(struct driver_data
*dd
, unsigned int cmd
,
2327 case HDIO_GET_IDENTITY
:
2329 if (copy_to_user((void __user
*)arg
, dd
->port
->identify
,
2330 sizeof(u16
) * ATA_ID_WORDS
))
2334 case HDIO_DRIVE_CMD
:
2336 u8 drive_command
[4];
2338 /* Copy the user command info to our buffer. */
2339 if (copy_from_user(drive_command
,
2340 (void __user
*) arg
,
2341 sizeof(drive_command
)))
2344 /* Execute the drive command. */
2345 if (exec_drive_command(dd
->port
,
2347 (void __user
*) (arg
+4)))
2350 /* Copy the status back to the users buffer. */
2351 if (copy_to_user((void __user
*) arg
,
2353 sizeof(drive_command
)))
2358 case HDIO_DRIVE_TASK
:
2360 u8 drive_command
[7];
2362 /* Copy the user command info to our buffer. */
2363 if (copy_from_user(drive_command
,
2364 (void __user
*) arg
,
2365 sizeof(drive_command
)))
2368 /* Execute the drive command. */
2369 if (exec_drive_task(dd
->port
, drive_command
))
2372 /* Copy the status back to the users buffer. */
2373 if (copy_to_user((void __user
*) arg
,
2375 sizeof(drive_command
)))
2380 case HDIO_DRIVE_TASKFILE
: {
2381 ide_task_request_t req_task
;
2384 if (copy_from_user(&req_task
, (void __user
*) arg
,
2388 outtotal
= sizeof(req_task
);
2390 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
2391 &req_task
, outtotal
);
2393 if (copy_to_user((void __user
*) arg
, &req_task
,
2407 * Submit an IO to the hw
2409 * This function is called by the block layer to issue an io
2410 * to the device. Upon completion, the callback function will
2411 * be called with the data parameter passed as the callback data.
2413 * @dd Pointer to the driver data structure.
2414 * @start First sector to read.
2415 * @nsect Number of sectors to read.
2416 * @nents Number of entries in scatter list for the read command.
2417 * @tag The tag of this read command.
2418 * @callback Pointer to the function that should be called
2419 * when the read completes.
2420 * @data Callback data passed to the callback function
2421 * when the read completes.
2422 * @dir Direction (read or write)
2427 static void mtip_hw_submit_io(struct driver_data
*dd
, sector_t start
,
2428 int nsect
, int nents
, int tag
, void *callback
,
2429 void *data
, int dir
)
2431 struct host_to_dev_fis
*fis
;
2432 struct mtip_port
*port
= dd
->port
;
2433 struct mtip_cmd
*command
= &port
->commands
[tag
];
2434 int dma_dir
= (dir
== READ
) ? DMA_FROM_DEVICE
: DMA_TO_DEVICE
;
2436 /* Map the scatter list for DMA access */
2437 nents
= dma_map_sg(&dd
->pdev
->dev
, command
->sg
, nents
, dma_dir
);
2439 command
->scatter_ents
= nents
;
2442 * The number of retries for this command before it is
2443 * reported as a failure to the upper layers.
2445 command
->retries
= MTIP_MAX_RETRIES
;
2448 fis
= command
->command
;
2452 (dir
== READ
? ATA_CMD_FPDMA_READ
: ATA_CMD_FPDMA_WRITE
);
2453 *((unsigned int *) &fis
->lba_low
) = (start
& 0xFFFFFF);
2454 *((unsigned int *) &fis
->lba_low_ex
) = ((start
>> 24) & 0xFFFFFF);
2455 fis
->device
= 1 << 6;
2456 fis
->features
= nsect
& 0xFF;
2457 fis
->features_ex
= (nsect
>> 8) & 0xFF;
2458 fis
->sect_count
= ((tag
<< 3) | (tag
>> 5));
2459 fis
->sect_cnt_ex
= 0;
2463 fill_command_sg(dd
, command
, nents
);
2465 /* Populate the command header */
2466 command
->command_header
->opts
=
2467 __force_bit2int
cpu_to_le32(
2468 (nents
<< 16) | 5 | AHCI_CMD_PREFETCH
);
2469 command
->command_header
->byte_count
= 0;
2472 * Set the completion function and data for the command
2473 * within this layer.
2475 command
->comp_data
= dd
;
2476 command
->comp_func
= mtip_async_complete
;
2477 command
->direction
= dma_dir
;
2480 * Set the completion function and data for the command passed
2481 * from the upper layer.
2483 command
->async_data
= data
;
2484 command
->async_callback
= callback
;
2487 * To prevent this command from being issued
2488 * if an internal command is in progress or error handling is active.
2490 if (port
->flags
& MTIP_PF_PAUSE_IO
) {
2491 set_bit(tag
, port
->cmds_to_issue
);
2492 set_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2496 /* Issue the command to the hardware */
2497 mtip_issue_ncq_command(port
, tag
);
2503 * Release a command slot.
2505 * @dd Pointer to the driver data structure.
2511 static void mtip_hw_release_scatterlist(struct driver_data
*dd
, int tag
)
2513 release_slot(dd
->port
, tag
);
2517 * Obtain a command slot and return its associated scatter list.
2519 * @dd Pointer to the driver data structure.
2520 * @tag Pointer to an int that will receive the allocated command
2524 * Pointer to the scatter list for the allocated command slot
2525 * or NULL if no command slots are available.
2527 static struct scatterlist
*mtip_hw_get_scatterlist(struct driver_data
*dd
,
2531 * It is possible that, even with this semaphore, a thread
2532 * may think that no command slots are available. Therefore, we
2533 * need to make an attempt to get_slot().
2535 down(&dd
->port
->cmd_slot
);
2536 *tag
= get_slot(dd
->port
);
2538 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
2539 up(&dd
->port
->cmd_slot
);
2542 if (unlikely(*tag
< 0)) {
2543 up(&dd
->port
->cmd_slot
);
2547 return dd
->port
->commands
[*tag
].sg
;
2551 * Sysfs status dump.
2553 * @dev Pointer to the device structure, passed by the kernrel.
2554 * @attr Pointer to the device_attribute structure passed by the kernel.
2555 * @buf Pointer to the char buffer that will receive the stats info.
2558 * The size, in bytes, of the data copied into buf.
2560 static ssize_t
mtip_hw_show_status(struct device
*dev
,
2561 struct device_attribute
*attr
,
2564 struct driver_data
*dd
= dev_to_disk(dev
)->private_data
;
2567 if (test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))
2568 size
+= sprintf(buf
, "%s", "thermal_shutdown\n");
2569 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
))
2570 size
+= sprintf(buf
, "%s", "write_protect\n");
2572 size
+= sprintf(buf
, "%s", "online\n");
2577 static DEVICE_ATTR(status
, S_IRUGO
, mtip_hw_show_status
, NULL
);
2579 static ssize_t
mtip_hw_read_registers(struct file
*f
, char __user
*ubuf
,
2580 size_t len
, loff_t
*offset
)
2582 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2583 char buf
[MTIP_DFS_MAX_BUF_SIZE
];
2584 u32 group_allocated
;
2594 size
+= sprintf(&buf
[size
], "H/ S ACTive : [ 0x");
2596 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2597 size
+= sprintf(&buf
[size
], "%08X ",
2598 readl(dd
->port
->s_active
[n
]));
2600 size
+= sprintf(&buf
[size
], "]\n");
2601 size
+= sprintf(&buf
[size
], "H/ Command Issue : [ 0x");
2603 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2604 size
+= sprintf(&buf
[size
], "%08X ",
2605 readl(dd
->port
->cmd_issue
[n
]));
2607 size
+= sprintf(&buf
[size
], "]\n");
2608 size
+= sprintf(&buf
[size
], "H/ Completed : [ 0x");
2610 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2611 size
+= sprintf(&buf
[size
], "%08X ",
2612 readl(dd
->port
->completed
[n
]));
2614 size
+= sprintf(&buf
[size
], "]\n");
2615 size
+= sprintf(&buf
[size
], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
2616 readl(dd
->port
->mmio
+ PORT_IRQ_STAT
));
2617 size
+= sprintf(&buf
[size
], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
2618 readl(dd
->mmio
+ HOST_IRQ_STAT
));
2619 size
+= sprintf(&buf
[size
], "\n");
2621 size
+= sprintf(&buf
[size
], "L/ Allocated : [ 0x");
2623 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2624 if (sizeof(long) > sizeof(u32
))
2626 dd
->port
->allocated
[n
/2] >> (32*(n
&1));
2628 group_allocated
= dd
->port
->allocated
[n
];
2629 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2631 size
+= sprintf(&buf
[size
], "]\n");
2633 size
+= sprintf(&buf
[size
], "L/ Commands in Q : [ 0x");
2635 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2636 if (sizeof(long) > sizeof(u32
))
2638 dd
->port
->cmds_to_issue
[n
/2] >> (32*(n
&1));
2640 group_allocated
= dd
->port
->cmds_to_issue
[n
];
2641 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2643 size
+= sprintf(&buf
[size
], "]\n");
2645 *offset
= size
<= len
? size
: len
;
2646 size
= copy_to_user(ubuf
, buf
, *offset
);
2653 static ssize_t
mtip_hw_read_flags(struct file
*f
, char __user
*ubuf
,
2654 size_t len
, loff_t
*offset
)
2656 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2657 char buf
[MTIP_DFS_MAX_BUF_SIZE
];
2666 size
+= sprintf(&buf
[size
], "Flag-port : [ %08lX ]\n",
2668 size
+= sprintf(&buf
[size
], "Flag-dd : [ %08lX ]\n",
2671 *offset
= size
<= len
? size
: len
;
2672 size
= copy_to_user(ubuf
, buf
, *offset
);
2679 static const struct file_operations mtip_regs_fops
= {
2680 .owner
= THIS_MODULE
,
2681 .open
= simple_open
,
2682 .read
= mtip_hw_read_registers
,
2683 .llseek
= no_llseek
,
2686 static const struct file_operations mtip_flags_fops
= {
2687 .owner
= THIS_MODULE
,
2688 .open
= simple_open
,
2689 .read
= mtip_hw_read_flags
,
2690 .llseek
= no_llseek
,
2694 * Create the sysfs related attributes.
2696 * @dd Pointer to the driver data structure.
2697 * @kobj Pointer to the kobj for the block device.
2700 * 0 Operation completed successfully.
2701 * -EINVAL Invalid parameter.
2703 static int mtip_hw_sysfs_init(struct driver_data
*dd
, struct kobject
*kobj
)
2708 if (sysfs_create_file(kobj
, &dev_attr_status
.attr
))
2709 dev_warn(&dd
->pdev
->dev
,
2710 "Error creating 'status' sysfs entry\n");
2715 * Remove the sysfs related attributes.
2717 * @dd Pointer to the driver data structure.
2718 * @kobj Pointer to the kobj for the block device.
2721 * 0 Operation completed successfully.
2722 * -EINVAL Invalid parameter.
2724 static int mtip_hw_sysfs_exit(struct driver_data
*dd
, struct kobject
*kobj
)
2729 sysfs_remove_file(kobj
, &dev_attr_status
.attr
);
2734 static int mtip_hw_debugfs_init(struct driver_data
*dd
)
2739 dd
->dfs_node
= debugfs_create_dir(dd
->disk
->disk_name
, dfs_parent
);
2740 if (IS_ERR_OR_NULL(dd
->dfs_node
)) {
2741 dev_warn(&dd
->pdev
->dev
,
2742 "Error creating node %s under debugfs\n",
2743 dd
->disk
->disk_name
);
2744 dd
->dfs_node
= NULL
;
2748 debugfs_create_file("flags", S_IRUGO
, dd
->dfs_node
, dd
,
2750 debugfs_create_file("registers", S_IRUGO
, dd
->dfs_node
, dd
,
2756 static void mtip_hw_debugfs_exit(struct driver_data
*dd
)
2758 debugfs_remove_recursive(dd
->dfs_node
);
2763 * Perform any init/resume time hardware setup
2765 * @dd Pointer to the driver data structure.
2770 static inline void hba_setup(struct driver_data
*dd
)
2773 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2775 /* interrupt bug workaround: use only 1 IS bit.*/
2777 HSORG_DISABLE_SLOTGRP_INTR
|
2778 HSORG_DISABLE_SLOTGRP_PXIS
,
2779 dd
->mmio
+ HOST_HSORG
);
2783 * Detect the details of the product, and store anything needed
2784 * into the driver data structure. This includes product type and
2785 * version and number of slot groups.
2787 * @dd Pointer to the driver data structure.
2792 static void mtip_detect_product(struct driver_data
*dd
)
2795 unsigned int rev
, slotgroups
;
2798 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
2800 * [15:8] hardware/software interface rev#
2801 * [ 3] asic-style interface
2802 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
2804 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2806 dd
->product_type
= MTIP_PRODUCT_UNKNOWN
;
2807 dd
->slot_groups
= 1;
2810 dd
->product_type
= MTIP_PRODUCT_ASICFPGA
;
2811 rev
= (hwdata
& HSORG_HWREV
) >> 8;
2812 slotgroups
= (hwdata
& HSORG_SLOTGROUPS
) + 1;
2813 dev_info(&dd
->pdev
->dev
,
2814 "ASIC-FPGA design, HS rev 0x%x, "
2815 "%i slot groups [%i slots]\n",
2820 if (slotgroups
> MTIP_MAX_SLOT_GROUPS
) {
2821 dev_warn(&dd
->pdev
->dev
,
2822 "Warning: driver only supports "
2823 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS
);
2824 slotgroups
= MTIP_MAX_SLOT_GROUPS
;
2826 dd
->slot_groups
= slotgroups
;
2830 dev_warn(&dd
->pdev
->dev
, "Unrecognized product id\n");
2834 * Blocking wait for FTL rebuild to complete
2836 * @dd Pointer to the DRIVER_DATA structure.
2839 * 0 FTL rebuild completed successfully
2840 * -EFAULT FTL rebuild error/timeout/interruption
2842 static int mtip_ftl_rebuild_poll(struct driver_data
*dd
)
2844 unsigned long timeout
, cnt
= 0, start
;
2846 dev_warn(&dd
->pdev
->dev
,
2847 "FTL rebuild in progress. Polling for completion.\n");
2850 timeout
= jiffies
+ msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS
);
2853 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
2856 if (mtip_check_surprise_removal(dd
->pdev
))
2859 if (mtip_get_identify(dd
->port
, NULL
) < 0)
2862 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
2863 MTIP_FTL_REBUILD_MAGIC
) {
2865 /* Print message every 3 minutes */
2867 dev_warn(&dd
->pdev
->dev
,
2868 "FTL rebuild in progress (%d secs).\n",
2869 jiffies_to_msecs(jiffies
- start
) / 1000);
2873 dev_warn(&dd
->pdev
->dev
,
2874 "FTL rebuild complete (%d secs).\n",
2875 jiffies_to_msecs(jiffies
- start
) / 1000);
2876 mtip_block_initialize(dd
);
2880 } while (time_before(jiffies
, timeout
));
2882 /* Check for timeout */
2883 dev_err(&dd
->pdev
->dev
,
2884 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
2885 jiffies_to_msecs(jiffies
- start
) / 1000);
2890 * service thread to issue queued commands
2892 * @data Pointer to the driver data structure.
2898 static int mtip_service_thread(void *data
)
2900 struct driver_data
*dd
= (struct driver_data
*)data
;
2901 unsigned long slot
, slot_start
, slot_wrap
;
2902 unsigned int num_cmd_slots
= dd
->slot_groups
* 32;
2903 struct mtip_port
*port
= dd
->port
;
2907 * the condition is to check neither an internal command is
2908 * is in progress nor error handling is active
2910 wait_event_interruptible(port
->svc_wait
, (port
->flags
) &&
2911 !(port
->flags
& MTIP_PF_PAUSE_IO
));
2913 if (kthread_should_stop())
2916 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
2920 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
2921 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
2923 /* used to restrict the loop to one iteration */
2924 slot_start
= num_cmd_slots
;
2927 slot
= find_next_bit(port
->cmds_to_issue
,
2928 num_cmd_slots
, slot
);
2929 if (slot_wrap
== 1) {
2930 if ((slot_start
>= slot
) ||
2931 (slot
>= num_cmd_slots
))
2934 if (unlikely(slot_start
== num_cmd_slots
))
2937 if (unlikely(slot
== num_cmd_slots
)) {
2943 /* Issue the command to the hardware */
2944 mtip_issue_ncq_command(port
, slot
);
2946 clear_bit(slot
, port
->cmds_to_issue
);
2949 clear_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2950 } else if (test_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
)) {
2951 if (!mtip_ftl_rebuild_poll(dd
))
2952 set_bit(MTIP_DDF_REBUILD_FAILED_BIT
,
2954 clear_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
);
2956 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
2958 if (test_bit(MTIP_PF_SVC_THD_STOP_BIT
, &port
->flags
))
2965 * Called once for each card.
2967 * @dd Pointer to the driver data structure.
2970 * 0 on success, else an error code.
2972 static int mtip_hw_init(struct driver_data
*dd
)
2976 unsigned int num_command_slots
;
2977 unsigned long timeout
, timetaken
;
2979 struct smart_attr attr242
;
2981 dd
->mmio
= pcim_iomap_table(dd
->pdev
)[MTIP_ABAR
];
2983 mtip_detect_product(dd
);
2984 if (dd
->product_type
== MTIP_PRODUCT_UNKNOWN
) {
2988 num_command_slots
= dd
->slot_groups
* 32;
2992 tasklet_init(&dd
->tasklet
, mtip_tasklet
, (unsigned long)dd
);
2994 dd
->port
= kzalloc(sizeof(struct mtip_port
), GFP_KERNEL
);
2996 dev_err(&dd
->pdev
->dev
,
2997 "Memory allocation: port structure\n");
3001 /* Counting semaphore to track command slot usage */
3002 sema_init(&dd
->port
->cmd_slot
, num_command_slots
- 1);
3004 /* Spinlock to prevent concurrent issue */
3005 spin_lock_init(&dd
->port
->cmd_issue_lock
);
3007 /* Set the port mmio base address. */
3008 dd
->port
->mmio
= dd
->mmio
+ PORT_OFFSET
;
3011 /* Allocate memory for the command list. */
3012 dd
->port
->command_list
=
3013 dmam_alloc_coherent(&dd
->pdev
->dev
,
3014 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3015 &dd
->port
->command_list_dma
,
3017 if (!dd
->port
->command_list
) {
3018 dev_err(&dd
->pdev
->dev
,
3019 "Memory allocation: command list\n");
3024 /* Clear the memory we have allocated. */
3025 memset(dd
->port
->command_list
,
3027 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4));
3029 /* Setup the addresse of the RX FIS. */
3030 dd
->port
->rxfis
= dd
->port
->command_list
+ HW_CMD_SLOT_SZ
;
3031 dd
->port
->rxfis_dma
= dd
->port
->command_list_dma
+ HW_CMD_SLOT_SZ
;
3033 /* Setup the address of the command tables. */
3034 dd
->port
->command_table
= dd
->port
->rxfis
+ AHCI_RX_FIS_SZ
;
3035 dd
->port
->command_tbl_dma
= dd
->port
->rxfis_dma
+ AHCI_RX_FIS_SZ
;
3037 /* Setup the address of the identify data. */
3038 dd
->port
->identify
= dd
->port
->command_table
+
3040 dd
->port
->identify_dma
= dd
->port
->command_tbl_dma
+
3043 /* Setup the address of the sector buffer - for some non-ncq cmds */
3044 dd
->port
->sector_buffer
= (void *) dd
->port
->identify
+ ATA_SECT_SIZE
;
3045 dd
->port
->sector_buffer_dma
= dd
->port
->identify_dma
+ ATA_SECT_SIZE
;
3047 /* Setup the address of the log buf - for read log command */
3048 dd
->port
->log_buf
= (void *)dd
->port
->sector_buffer
+ ATA_SECT_SIZE
;
3049 dd
->port
->log_buf_dma
= dd
->port
->sector_buffer_dma
+ ATA_SECT_SIZE
;
3051 /* Setup the address of the smart buf - for smart read data command */
3052 dd
->port
->smart_buf
= (void *)dd
->port
->log_buf
+ ATA_SECT_SIZE
;
3053 dd
->port
->smart_buf_dma
= dd
->port
->log_buf_dma
+ ATA_SECT_SIZE
;
3056 /* Point the command headers at the command tables. */
3057 for (i
= 0; i
< num_command_slots
; i
++) {
3058 dd
->port
->commands
[i
].command_header
=
3059 dd
->port
->command_list
+
3060 (sizeof(struct mtip_cmd_hdr
) * i
);
3061 dd
->port
->commands
[i
].command_header_dma
=
3062 dd
->port
->command_list_dma
+
3063 (sizeof(struct mtip_cmd_hdr
) * i
);
3065 dd
->port
->commands
[i
].command
=
3066 dd
->port
->command_table
+ (HW_CMD_TBL_SZ
* i
);
3067 dd
->port
->commands
[i
].command_dma
=
3068 dd
->port
->command_tbl_dma
+ (HW_CMD_TBL_SZ
* i
);
3070 if (readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
)
3071 dd
->port
->commands
[i
].command_header
->ctbau
=
3072 __force_bit2int
cpu_to_le32(
3073 (dd
->port
->commands
[i
].command_dma
>> 16) >> 16);
3074 dd
->port
->commands
[i
].command_header
->ctba
=
3075 __force_bit2int
cpu_to_le32(
3076 dd
->port
->commands
[i
].command_dma
& 0xFFFFFFFF);
3079 * If this is not done, a bug is reported by the stock
3080 * FC11 i386. Due to the fact that it has lots of kernel
3081 * debugging enabled.
3083 sg_init_table(dd
->port
->commands
[i
].sg
, MTIP_MAX_SG
);
3085 /* Mark all commands as currently inactive.*/
3086 atomic_set(&dd
->port
->commands
[i
].active
, 0);
3089 /* Setup the pointers to the extended s_active and CI registers. */
3090 for (i
= 0; i
< dd
->slot_groups
; i
++) {
3091 dd
->port
->s_active
[i
] =
3092 dd
->port
->mmio
+ i
*0x80 + PORT_SCR_ACT
;
3093 dd
->port
->cmd_issue
[i
] =
3094 dd
->port
->mmio
+ i
*0x80 + PORT_COMMAND_ISSUE
;
3095 dd
->port
->completed
[i
] =
3096 dd
->port
->mmio
+ i
*0x80 + PORT_SDBV
;
3099 timetaken
= jiffies
;
3100 timeout
= jiffies
+ msecs_to_jiffies(30000);
3101 while (((readl(dd
->port
->mmio
+ PORT_SCR_STAT
) & 0x0F) != 0x03) &&
3102 time_before(jiffies
, timeout
)) {
3105 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
3106 timetaken
= jiffies
- timetaken
;
3107 dev_warn(&dd
->pdev
->dev
,
3108 "Surprise removal detected at %u ms\n",
3109 jiffies_to_msecs(timetaken
));
3113 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
3114 timetaken
= jiffies
- timetaken
;
3115 dev_warn(&dd
->pdev
->dev
,
3116 "Removal detected at %u ms\n",
3117 jiffies_to_msecs(timetaken
));
3122 /* Conditionally reset the HBA. */
3123 if (!(readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_NZDMA
)) {
3124 if (mtip_hba_reset(dd
) < 0) {
3125 dev_err(&dd
->pdev
->dev
,
3126 "Card did not reset within timeout\n");
3131 /* Clear any pending interrupts on the HBA */
3132 writel(readl(dd
->mmio
+ HOST_IRQ_STAT
),
3133 dd
->mmio
+ HOST_IRQ_STAT
);
3136 mtip_init_port(dd
->port
);
3137 mtip_start_port(dd
->port
);
3139 /* Setup the ISR and enable interrupts. */
3140 rv
= devm_request_irq(&dd
->pdev
->dev
,
3144 dev_driver_string(&dd
->pdev
->dev
),
3148 dev_err(&dd
->pdev
->dev
,
3149 "Unable to allocate IRQ %d\n", dd
->pdev
->irq
);
3153 /* Enable interrupts on the HBA. */
3154 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3155 dd
->mmio
+ HOST_CTL
);
3157 init_timer(&dd
->port
->cmd_timer
);
3158 init_waitqueue_head(&dd
->port
->svc_wait
);
3160 dd
->port
->cmd_timer
.data
= (unsigned long int) dd
->port
;
3161 dd
->port
->cmd_timer
.function
= mtip_timeout_function
;
3162 mod_timer(&dd
->port
->cmd_timer
,
3163 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
3166 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)) {
3171 if (mtip_get_identify(dd
->port
, NULL
) < 0) {
3176 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
3177 MTIP_FTL_REBUILD_MAGIC
) {
3178 set_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
);
3179 return MTIP_FTL_REBUILD_MAGIC
;
3181 mtip_dump_identify(dd
->port
);
3183 /* check write protect, over temp and rebuild statuses */
3184 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
3186 dd
->port
->log_buf_dma
, 1);
3188 dev_warn(&dd
->pdev
->dev
,
3189 "Error in READ LOG EXT (10h) command\n");
3190 /* non-critical error, don't fail the load */
3192 buf
= (unsigned char *)dd
->port
->log_buf
;
3193 if (buf
[259] & 0x1) {
3194 dev_info(&dd
->pdev
->dev
,
3195 "Write protect bit is set.\n");
3196 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
3198 if (buf
[288] == 0xF7) {
3199 dev_info(&dd
->pdev
->dev
,
3200 "Exceeded Tmax, drive in thermal shutdown.\n");
3201 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
3203 if (buf
[288] == 0xBF) {
3204 dev_info(&dd
->pdev
->dev
,
3205 "Drive indicates rebuild has failed.\n");
3210 /* get write protect progess */
3211 memset(&attr242
, 0, sizeof(struct smart_attr
));
3212 if (mtip_get_smart_attr(dd
->port
, 242, &attr242
))
3213 dev_warn(&dd
->pdev
->dev
,
3214 "Unable to check write protect progress\n");
3216 dev_info(&dd
->pdev
->dev
,
3217 "Write protect progress: %d%% (%d blocks)\n",
3218 attr242
.cur
, attr242
.data
);
3222 del_timer_sync(&dd
->port
->cmd_timer
);
3224 /* Disable interrupts on the HBA. */
3225 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3226 dd
->mmio
+ HOST_CTL
);
3228 /*Release the IRQ. */
3229 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3232 mtip_deinit_port(dd
->port
);
3234 /* Free the command/command header memory. */
3235 dmam_free_coherent(&dd
->pdev
->dev
,
3236 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3237 dd
->port
->command_list
,
3238 dd
->port
->command_list_dma
);
3240 /* Free the memory allocated for the for structure. */
3247 * Called to deinitialize an interface.
3249 * @dd Pointer to the driver data structure.
3254 static int mtip_hw_exit(struct driver_data
*dd
)
3257 * Send standby immediate (E0h) to the drive so that it
3260 if (!test_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
)) {
3262 if (!test_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
))
3263 if (mtip_standby_immediate(dd
->port
))
3264 dev_warn(&dd
->pdev
->dev
,
3265 "STANDBY IMMEDIATE failed\n");
3267 /* de-initialize the port. */
3268 mtip_deinit_port(dd
->port
);
3270 /* Disable interrupts on the HBA. */
3271 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3272 dd
->mmio
+ HOST_CTL
);
3275 del_timer_sync(&dd
->port
->cmd_timer
);
3277 /* Release the IRQ. */
3278 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3280 /* Stop the bottom half tasklet. */
3281 tasklet_kill(&dd
->tasklet
);
3283 /* Free the command/command header memory. */
3284 dmam_free_coherent(&dd
->pdev
->dev
,
3285 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3286 dd
->port
->command_list
,
3287 dd
->port
->command_list_dma
);
3288 /* Free the memory allocated for the for structure. */
3295 * Issue a Standby Immediate command to the device.
3297 * This function is called by the Block Layer just before the
3298 * system powers off during a shutdown.
3300 * @dd Pointer to the driver data structure.
3305 static int mtip_hw_shutdown(struct driver_data
*dd
)
3308 * Send standby immediate (E0h) to the drive so that it
3311 mtip_standby_immediate(dd
->port
);
3319 * This function is called by the Block Layer just before the
3320 * system hibernates.
3322 * @dd Pointer to the driver data structure.
3325 * 0 Suspend was successful
3326 * -EFAULT Suspend was not successful
3328 static int mtip_hw_suspend(struct driver_data
*dd
)
3331 * Send standby immediate (E0h) to the drive
3332 * so that it saves its state.
3334 if (mtip_standby_immediate(dd
->port
) != 0) {
3335 dev_err(&dd
->pdev
->dev
,
3336 "Failed standby-immediate command\n");
3340 /* Disable interrupts on the HBA.*/
3341 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3342 dd
->mmio
+ HOST_CTL
);
3343 mtip_deinit_port(dd
->port
);
3351 * This function is called by the Block Layer as the
3354 * @dd Pointer to the driver data structure.
3357 * 0 Resume was successful
3358 * -EFAULT Resume was not successful
3360 static int mtip_hw_resume(struct driver_data
*dd
)
3362 /* Perform any needed hardware setup steps */
3366 if (mtip_hba_reset(dd
) != 0) {
3367 dev_err(&dd
->pdev
->dev
,
3368 "Unable to reset the HBA\n");
3373 * Enable the port, DMA engine, and FIS reception specific
3374 * h/w in controller.
3376 mtip_init_port(dd
->port
);
3377 mtip_start_port(dd
->port
);
3379 /* Enable interrupts on the HBA.*/
3380 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3381 dd
->mmio
+ HOST_CTL
);
3387 * Helper function for reusing disk name
3388 * upon hot insertion.
3390 static int rssd_disk_name_format(char *prefix
,
3395 const int base
= 'z' - 'a' + 1;
3396 char *begin
= buf
+ strlen(prefix
);
3397 char *end
= buf
+ buflen
;
3407 *--p
= 'a' + (index
% unit
);
3408 index
= (index
/ unit
) - 1;
3409 } while (index
>= 0);
3411 memmove(begin
, p
, end
- p
);
3412 memcpy(buf
, prefix
, strlen(prefix
));
3418 * Block layer IOCTL handler.
3420 * @dev Pointer to the block_device structure.
3422 * @cmd IOCTL command passed from the user application.
3423 * @arg Argument passed from the user application.
3426 * 0 IOCTL completed successfully.
3427 * -ENOTTY IOCTL not supported or invalid driver data
3428 * structure pointer.
3430 static int mtip_block_ioctl(struct block_device
*dev
,
3435 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3437 if (!capable(CAP_SYS_ADMIN
))
3443 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3450 return mtip_hw_ioctl(dd
, cmd
, arg
);
3454 #ifdef CONFIG_COMPAT
3456 * Block layer compat IOCTL handler.
3458 * @dev Pointer to the block_device structure.
3460 * @cmd IOCTL command passed from the user application.
3461 * @arg Argument passed from the user application.
3464 * 0 IOCTL completed successfully.
3465 * -ENOTTY IOCTL not supported or invalid driver data
3466 * structure pointer.
3468 static int mtip_block_compat_ioctl(struct block_device
*dev
,
3473 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3475 if (!capable(CAP_SYS_ADMIN
))
3481 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3487 case HDIO_DRIVE_TASKFILE
: {
3488 struct mtip_compat_ide_task_request_s __user
*compat_req_task
;
3489 ide_task_request_t req_task
;
3490 int compat_tasksize
, outtotal
, ret
;
3493 sizeof(struct mtip_compat_ide_task_request_s
);
3496 (struct mtip_compat_ide_task_request_s __user
*) arg
;
3498 if (copy_from_user(&req_task
, (void __user
*) arg
,
3499 compat_tasksize
- (2 * sizeof(compat_long_t
))))
3502 if (get_user(req_task
.out_size
, &compat_req_task
->out_size
))
3505 if (get_user(req_task
.in_size
, &compat_req_task
->in_size
))
3508 outtotal
= sizeof(struct mtip_compat_ide_task_request_s
);
3510 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
3511 &req_task
, outtotal
);
3513 if (copy_to_user((void __user
*) arg
, &req_task
,
3515 (2 * sizeof(compat_long_t
))))
3518 if (put_user(req_task
.out_size
, &compat_req_task
->out_size
))
3521 if (put_user(req_task
.in_size
, &compat_req_task
->in_size
))
3527 return mtip_hw_ioctl(dd
, cmd
, arg
);
3533 * Obtain the geometry of the device.
3535 * You may think that this function is obsolete, but some applications,
3536 * fdisk for example still used CHS values. This function describes the
3537 * device as having 224 heads and 56 sectors per cylinder. These values are
3538 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
3539 * partition is described in terms of a start and end cylinder this means
3540 * that each partition is also 4KB aligned. Non-aligned partitions adversely
3541 * affects performance.
3543 * @dev Pointer to the block_device strucutre.
3544 * @geo Pointer to a hd_geometry structure.
3547 * 0 Operation completed successfully.
3548 * -ENOTTY An error occurred while reading the drive capacity.
3550 static int mtip_block_getgeo(struct block_device
*dev
,
3551 struct hd_geometry
*geo
)
3553 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3559 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3560 dev_warn(&dd
->pdev
->dev
,
3561 "Could not get drive capacity.\n");
3567 sector_div(capacity
, (geo
->heads
* geo
->sectors
));
3568 geo
->cylinders
= capacity
;
3573 * Block device operation function.
3575 * This structure contains pointers to the functions required by the block
3578 static const struct block_device_operations mtip_block_ops
= {
3579 .ioctl
= mtip_block_ioctl
,
3580 #ifdef CONFIG_COMPAT
3581 .compat_ioctl
= mtip_block_compat_ioctl
,
3583 .getgeo
= mtip_block_getgeo
,
3584 .owner
= THIS_MODULE
3588 * Block layer make request function.
3590 * This function is called by the kernel to process a BIO for
3593 * @queue Pointer to the request queue. Unused other than to obtain
3594 * the driver data structure.
3595 * @bio Pointer to the BIO.
3598 static void mtip_make_request(struct request_queue
*queue
, struct bio
*bio
)
3600 struct driver_data
*dd
= queue
->queuedata
;
3601 struct scatterlist
*sg
;
3602 struct bio_vec
*bvec
;
3606 if (unlikely(dd
->dd_flag
& MTIP_DDF_STOP_IO
)) {
3607 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
3609 bio_endio(bio
, -ENXIO
);
3612 if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))) {
3613 bio_endio(bio
, -ENODATA
);
3616 if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT
,
3618 bio_data_dir(bio
))) {
3619 bio_endio(bio
, -ENODATA
);
3624 if (unlikely(!bio_has_data(bio
))) {
3625 blk_queue_flush(queue
, 0);
3630 sg
= mtip_hw_get_scatterlist(dd
, &tag
);
3631 if (likely(sg
!= NULL
)) {
3632 blk_queue_bounce(queue
, &bio
);
3634 if (unlikely((bio
)->bi_vcnt
> MTIP_MAX_SG
)) {
3635 dev_warn(&dd
->pdev
->dev
,
3636 "Maximum number of SGL entries exceeded\n");
3638 mtip_hw_release_scatterlist(dd
, tag
);
3642 /* Create the scatter list for this bio. */
3643 bio_for_each_segment(bvec
, bio
, nents
) {
3644 sg_set_page(&sg
[nents
],
3650 /* Issue the read/write. */
3651 mtip_hw_submit_io(dd
,
3664 * Block layer initialization function.
3666 * This function is called once by the PCI layer for each P320
3667 * device that is connected to the system.
3669 * @dd Pointer to the driver data structure.
3672 * 0 on success else an error code.
3674 static int mtip_block_initialize(struct driver_data
*dd
)
3676 int rv
= 0, wait_for_rebuild
= 0;
3678 unsigned int index
= 0;
3679 struct kobject
*kobj
;
3680 unsigned char thd_name
[16];
3683 goto skip_create_disk
; /* hw init done, before rebuild */
3685 /* Initialize the protocol layer. */
3686 wait_for_rebuild
= mtip_hw_init(dd
);
3687 if (wait_for_rebuild
< 0) {
3688 dev_err(&dd
->pdev
->dev
,
3689 "Protocol layer initialization failed\n");
3691 goto protocol_init_error
;
3694 dd
->disk
= alloc_disk(MTIP_MAX_MINORS
);
3695 if (dd
->disk
== NULL
) {
3696 dev_err(&dd
->pdev
->dev
,
3697 "Unable to allocate gendisk structure\n");
3699 goto alloc_disk_error
;
3702 /* Generate the disk name, implemented same as in sd.c */
3704 if (!ida_pre_get(&rssd_index_ida
, GFP_KERNEL
))
3707 spin_lock(&rssd_index_lock
);
3708 rv
= ida_get_new(&rssd_index_ida
, &index
);
3709 spin_unlock(&rssd_index_lock
);
3710 } while (rv
== -EAGAIN
);
3715 rv
= rssd_disk_name_format("rssd",
3717 dd
->disk
->disk_name
,
3720 goto disk_index_error
;
3722 dd
->disk
->driverfs_dev
= &dd
->pdev
->dev
;
3723 dd
->disk
->major
= dd
->major
;
3724 dd
->disk
->first_minor
= dd
->instance
* MTIP_MAX_MINORS
;
3725 dd
->disk
->fops
= &mtip_block_ops
;
3726 dd
->disk
->private_data
= dd
;
3730 * if rebuild pending, start the service thread, and delay the block
3731 * queue creation and add_disk()
3733 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
3734 goto start_service_thread
;
3737 /* Allocate the request queue. */
3738 dd
->queue
= blk_alloc_queue(GFP_KERNEL
);
3739 if (dd
->queue
== NULL
) {
3740 dev_err(&dd
->pdev
->dev
,
3741 "Unable to allocate request queue\n");
3743 goto block_queue_alloc_init_error
;
3746 /* Attach our request function to the request queue. */
3747 blk_queue_make_request(dd
->queue
, mtip_make_request
);
3749 dd
->disk
->queue
= dd
->queue
;
3750 dd
->queue
->queuedata
= dd
;
3752 /* Set device limits. */
3753 set_bit(QUEUE_FLAG_NONROT
, &dd
->queue
->queue_flags
);
3754 blk_queue_max_segments(dd
->queue
, MTIP_MAX_SG
);
3755 blk_queue_physical_block_size(dd
->queue
, 4096);
3756 blk_queue_max_hw_sectors(dd
->queue
, 0xffff);
3757 blk_queue_max_segment_size(dd
->queue
, 0x400000);
3758 blk_queue_io_min(dd
->queue
, 4096);
3761 * write back cache is not supported in the device. FUA depends on
3762 * write back cache support, hence setting flush support to zero.
3764 blk_queue_flush(dd
->queue
, 0);
3766 /* Set the capacity of the device in 512 byte sectors. */
3767 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3768 dev_warn(&dd
->pdev
->dev
,
3769 "Could not read drive capacity\n");
3771 goto read_capacity_error
;
3773 set_capacity(dd
->disk
, capacity
);
3775 /* Enable the block device and add it to /dev */
3779 * Now that the disk is active, initialize any sysfs attributes
3780 * managed by the protocol layer.
3782 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3784 mtip_hw_sysfs_init(dd
, kobj
);
3787 mtip_hw_debugfs_init(dd
);
3789 if (dd
->mtip_svc_handler
) {
3790 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
3791 return rv
; /* service thread created for handling rebuild */
3794 start_service_thread
:
3795 sprintf(thd_name
, "mtip_svc_thd_%02d", index
);
3797 dd
->mtip_svc_handler
= kthread_run(mtip_service_thread
,
3800 if (IS_ERR(dd
->mtip_svc_handler
)) {
3801 dev_err(&dd
->pdev
->dev
, "service thread failed to start\n");
3802 dd
->mtip_svc_handler
= NULL
;
3804 goto kthread_run_error
;
3807 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
3808 rv
= wait_for_rebuild
;
3813 mtip_hw_debugfs_exit(dd
);
3815 /* Delete our gendisk. This also removes the device from /dev */
3816 del_gendisk(dd
->disk
);
3818 read_capacity_error
:
3819 blk_cleanup_queue(dd
->queue
);
3821 block_queue_alloc_init_error
:
3823 spin_lock(&rssd_index_lock
);
3824 ida_remove(&rssd_index_ida
, index
);
3825 spin_unlock(&rssd_index_lock
);
3831 mtip_hw_exit(dd
); /* De-initialize the protocol layer. */
3833 protocol_init_error
:
3838 * Block layer deinitialization function.
3840 * Called by the PCI layer as each P320 device is removed.
3842 * @dd Pointer to the driver data structure.
3847 static int mtip_block_remove(struct driver_data
*dd
)
3849 struct kobject
*kobj
;
3851 if (dd
->mtip_svc_handler
) {
3852 set_bit(MTIP_PF_SVC_THD_STOP_BIT
, &dd
->port
->flags
);
3853 wake_up_interruptible(&dd
->port
->svc_wait
);
3854 kthread_stop(dd
->mtip_svc_handler
);
3857 /* Clean up the sysfs attributes, if created */
3858 if (test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
)) {
3859 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3861 mtip_hw_sysfs_exit(dd
, kobj
);
3865 mtip_hw_debugfs_exit(dd
);
3868 * Delete our gendisk structure. This also removes the device
3871 del_gendisk(dd
->disk
);
3873 spin_lock(&rssd_index_lock
);
3874 ida_remove(&rssd_index_ida
, dd
->index
);
3875 spin_unlock(&rssd_index_lock
);
3877 blk_cleanup_queue(dd
->queue
);
3881 /* De-initialize the protocol layer. */
3888 * Function called by the PCI layer when just before the
3889 * machine shuts down.
3891 * If a protocol layer shutdown function is present it will be called
3894 * @dd Pointer to the driver data structure.
3899 static int mtip_block_shutdown(struct driver_data
*dd
)
3901 dev_info(&dd
->pdev
->dev
,
3902 "Shutting down %s ...\n", dd
->disk
->disk_name
);
3904 /* Delete our gendisk structure, and cleanup the blk queue. */
3905 del_gendisk(dd
->disk
);
3907 spin_lock(&rssd_index_lock
);
3908 ida_remove(&rssd_index_ida
, dd
->index
);
3909 spin_unlock(&rssd_index_lock
);
3911 blk_cleanup_queue(dd
->queue
);
3915 mtip_hw_shutdown(dd
);
3919 static int mtip_block_suspend(struct driver_data
*dd
)
3921 dev_info(&dd
->pdev
->dev
,
3922 "Suspending %s ...\n", dd
->disk
->disk_name
);
3923 mtip_hw_suspend(dd
);
3927 static int mtip_block_resume(struct driver_data
*dd
)
3929 dev_info(&dd
->pdev
->dev
, "Resuming %s ...\n",
3930 dd
->disk
->disk_name
);
3936 * Called for each supported PCI device detected.
3938 * This function allocates the private data structure, enables the
3939 * PCI device and then calls the block layer initialization function.
3942 * 0 on success else an error code.
3944 static int mtip_pci_probe(struct pci_dev
*pdev
,
3945 const struct pci_device_id
*ent
)
3948 struct driver_data
*dd
= NULL
;
3950 /* Allocate memory for this devices private data. */
3951 dd
= kzalloc(sizeof(struct driver_data
), GFP_KERNEL
);
3954 "Unable to allocate memory for driver data\n");
3958 /* Attach the private data to this PCI device. */
3959 pci_set_drvdata(pdev
, dd
);
3961 rv
= pcim_enable_device(pdev
);
3963 dev_err(&pdev
->dev
, "Unable to enable device\n");
3967 /* Map BAR5 to memory. */
3968 rv
= pcim_iomap_regions(pdev
, 1 << MTIP_ABAR
, MTIP_DRV_NAME
);
3970 dev_err(&pdev
->dev
, "Unable to map regions\n");
3974 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(64))) {
3975 rv
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
3978 rv
= pci_set_consistent_dma_mask(pdev
,
3981 dev_warn(&pdev
->dev
,
3982 "64-bit DMA enable failed\n");
3988 pci_set_master(pdev
);
3990 if (pci_enable_msi(pdev
)) {
3991 dev_warn(&pdev
->dev
,
3992 "Unable to enable MSI interrupt.\n");
3993 goto block_initialize_err
;
3996 /* Copy the info we may need later into the private data structure. */
3997 dd
->major
= mtip_major
;
3998 dd
->instance
= instance
;
4001 /* Initialize the block layer. */
4002 rv
= mtip_block_initialize(dd
);
4005 "Unable to initialize block layer\n");
4006 goto block_initialize_err
;
4010 * Increment the instance count so that each device has a unique
4014 if (rv
!= MTIP_FTL_REBUILD_MAGIC
)
4015 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
4018 block_initialize_err
:
4019 pci_disable_msi(pdev
);
4022 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4026 pci_set_drvdata(pdev
, NULL
);
4033 * Called for each probed device when the device is removed or the
4034 * driver is unloaded.
4039 static void mtip_pci_remove(struct pci_dev
*pdev
)
4041 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4044 set_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
);
4046 if (mtip_check_surprise_removal(pdev
)) {
4047 while (!test_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
)) {
4050 if (counter
== 10) {
4051 /* Cleanup the outstanding commands */
4052 mtip_command_cleanup(dd
);
4058 /* Clean up the block layer. */
4059 mtip_block_remove(dd
);
4061 pci_disable_msi(pdev
);
4064 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4068 * Called for each probed device when the device is suspended.
4074 static int mtip_pci_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
4077 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4081 "Driver private datastructure is NULL\n");
4085 set_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4087 /* Disable ports & interrupts then send standby immediate */
4088 rv
= mtip_block_suspend(dd
);
4091 "Failed to suspend controller\n");
4096 * Save the pci config space to pdev structure &
4097 * disable the device
4099 pci_save_state(pdev
);
4100 pci_disable_device(pdev
);
4102 /* Move to Low power state*/
4103 pci_set_power_state(pdev
, PCI_D3hot
);
4109 * Called for each probed device when the device is resumed.
4115 static int mtip_pci_resume(struct pci_dev
*pdev
)
4118 struct driver_data
*dd
;
4120 dd
= pci_get_drvdata(pdev
);
4123 "Driver private datastructure is NULL\n");
4127 /* Move the device to active State */
4128 pci_set_power_state(pdev
, PCI_D0
);
4130 /* Restore PCI configuration space */
4131 pci_restore_state(pdev
);
4133 /* Enable the PCI device*/
4134 rv
= pcim_enable_device(pdev
);
4137 "Failed to enable card during resume\n");
4140 pci_set_master(pdev
);
4143 * Calls hbaReset, initPort, & startPort function
4144 * then enables interrupts
4146 rv
= mtip_block_resume(dd
);
4148 dev_err(&pdev
->dev
, "Unable to resume\n");
4151 clear_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4162 static void mtip_pci_shutdown(struct pci_dev
*pdev
)
4164 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4166 mtip_block_shutdown(dd
);
4169 /* Table of device ids supported by this driver. */
4170 static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl
) = {
4171 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320_DEVICE_ID
) },
4175 /* Structure that describes the PCI driver functions. */
4176 static struct pci_driver mtip_pci_driver
= {
4177 .name
= MTIP_DRV_NAME
,
4178 .id_table
= mtip_pci_tbl
,
4179 .probe
= mtip_pci_probe
,
4180 .remove
= mtip_pci_remove
,
4181 .suspend
= mtip_pci_suspend
,
4182 .resume
= mtip_pci_resume
,
4183 .shutdown
= mtip_pci_shutdown
,
4186 MODULE_DEVICE_TABLE(pci
, mtip_pci_tbl
);
4189 * Module initialization function.
4191 * Called once when the module is loaded. This function allocates a major
4192 * block device number to the Cyclone devices and registers the PCI layer
4196 * 0 on success else error code.
4198 static int __init
mtip_init(void)
4202 printk(KERN_INFO MTIP_DRV_NAME
" Version " MTIP_DRV_VERSION
"\n");
4204 /* Allocate a major block device number to use with this driver. */
4205 error
= register_blkdev(0, MTIP_DRV_NAME
);
4207 printk(KERN_ERR
"Unable to register block device (%d)\n",
4214 dfs_parent
= debugfs_create_dir("rssd", NULL
);
4215 if (IS_ERR_OR_NULL(dfs_parent
)) {
4216 printk(KERN_WARNING
"Error creating debugfs parent\n");
4221 /* Register our PCI operations. */
4222 error
= pci_register_driver(&mtip_pci_driver
);
4224 debugfs_remove(dfs_parent
);
4225 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4232 * Module de-initialization function.
4234 * Called once when the module is unloaded. This function deallocates
4235 * the major block device number allocated by mtip_init() and
4236 * unregisters the PCI layer of the driver.
4241 static void __exit
mtip_exit(void)
4243 debugfs_remove_recursive(dfs_parent
);
4245 /* Release the allocated major block device number. */
4246 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4248 /* Unregister the PCI driver. */
4249 pci_unregister_driver(&mtip_pci_driver
);
4252 MODULE_AUTHOR("Micron Technology, Inc");
4253 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
4254 MODULE_LICENSE("GPL");
4255 MODULE_VERSION(MTIP_DRV_VERSION
);
4257 module_init(mtip_init
);
4258 module_exit(mtip_exit
);