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 (fis
->command
== ATA_CMD_SEC_ERASE_UNIT
)
1152 clear_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1154 if ((task_file_data
& 1))
1157 if (fis
->command
== ATA_CMD_SEC_ERASE_PREP
) {
1158 set_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1159 set_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1160 port
->ic_pause_timer
= jiffies
;
1162 } else if ((fis
->command
== ATA_CMD_DOWNLOAD_MICRO
) &&
1163 (fis
->features
== 0x03)) {
1164 set_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1165 port
->ic_pause_timer
= jiffies
;
1167 } else if ((fis
->command
== ATA_CMD_SEC_ERASE_UNIT
) ||
1168 ((fis
->command
== 0xFC) &&
1169 (fis
->features
== 0x27 || fis
->features
== 0x72 ||
1170 fis
->features
== 0x62 || fis
->features
== 0x26))) {
1171 /* Com reset after secure erase or lowlevel format */
1172 mtip_restart_port(port
);
1180 * Wait for port to quiesce
1182 * @port Pointer to port data structure
1183 * @timeout Max duration to wait (ms)
1187 * -EBUSY Commands still active
1189 static int mtip_quiesce_io(struct mtip_port
*port
, unsigned long timeout
)
1193 unsigned int active
= 1;
1195 to
= jiffies
+ msecs_to_jiffies(timeout
);
1197 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
) &&
1198 test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
1200 continue; /* svc thd is actively issuing commands */
1202 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1205 * Ignore s_active bit 0 of array element 0.
1206 * This bit will always be set
1208 active
= readl(port
->s_active
[0]) & 0xFFFFFFFE;
1209 for (n
= 1; n
< port
->dd
->slot_groups
; n
++)
1210 active
|= readl(port
->s_active
[n
]);
1216 } while (time_before(jiffies
, to
));
1218 return active
? -EBUSY
: 0;
1222 * Execute an internal command and wait for the completion.
1224 * @port Pointer to the port data structure.
1225 * @fis Pointer to the FIS that describes the command.
1226 * @fis_len Length in WORDS of the FIS.
1227 * @buffer DMA accessible for command data.
1228 * @buf_len Length, in bytes, of the data buffer.
1229 * @opts Command header options, excluding the FIS length
1230 * and the number of PRD entries.
1231 * @timeout Time in ms to wait for the command to complete.
1234 * 0 Command completed successfully.
1235 * -EFAULT The buffer address is not correctly aligned.
1236 * -EBUSY Internal command or other IO in progress.
1237 * -EAGAIN Time out waiting for command to complete.
1239 static int mtip_exec_internal_command(struct mtip_port
*port
,
1240 struct host_to_dev_fis
*fis
,
1246 unsigned long timeout
)
1248 struct mtip_cmd_sg
*command_sg
;
1249 DECLARE_COMPLETION_ONSTACK(wait
);
1250 int rv
= 0, ready2go
= 1;
1251 struct mtip_cmd
*int_cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
1254 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
1255 if (buffer
& 0x00000007) {
1256 dev_err(&port
->dd
->pdev
->dev
,
1257 "SG buffer is not 8 byte aligned\n");
1261 to
= jiffies
+ msecs_to_jiffies(timeout
);
1263 ready2go
= !test_and_set_bit(MTIP_TAG_INTERNAL
,
1268 } while (time_before(jiffies
, to
));
1270 dev_warn(&port
->dd
->pdev
->dev
,
1271 "Internal cmd active. new cmd [%02X]\n", fis
->command
);
1274 set_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1275 port
->ic_pause_timer
= 0;
1277 if (fis
->command
== ATA_CMD_SEC_ERASE_UNIT
)
1278 clear_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1279 else if (fis
->command
== ATA_CMD_DOWNLOAD_MICRO
)
1280 clear_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1282 if (atomic
== GFP_KERNEL
) {
1283 if (fis
->command
!= ATA_CMD_STANDBYNOW1
) {
1284 /* wait for io to complete if non atomic */
1285 if (mtip_quiesce_io(port
, 5000) < 0) {
1286 dev_warn(&port
->dd
->pdev
->dev
,
1287 "Failed to quiesce IO\n");
1288 release_slot(port
, MTIP_TAG_INTERNAL
);
1289 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1290 wake_up_interruptible(&port
->svc_wait
);
1295 /* Set the completion function and data for the command. */
1296 int_cmd
->comp_data
= &wait
;
1297 int_cmd
->comp_func
= mtip_completion
;
1300 /* Clear completion - we're going to poll */
1301 int_cmd
->comp_data
= NULL
;
1302 int_cmd
->comp_func
= mtip_null_completion
;
1305 /* Copy the command to the command table */
1306 memcpy(int_cmd
->command
, fis
, fis_len
*4);
1308 /* Populate the SG list */
1309 int_cmd
->command_header
->opts
=
1310 __force_bit2int
cpu_to_le32(opts
| fis_len
);
1312 command_sg
= int_cmd
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1315 __force_bit2int
cpu_to_le32((buf_len
-1) & 0x3FFFFF);
1317 __force_bit2int
cpu_to_le32(buffer
& 0xFFFFFFFF);
1318 command_sg
->dba_upper
=
1319 __force_bit2int
cpu_to_le32((buffer
>> 16) >> 16);
1321 int_cmd
->command_header
->opts
|=
1322 __force_bit2int
cpu_to_le32((1 << 16));
1325 /* Populate the command header */
1326 int_cmd
->command_header
->byte_count
= 0;
1328 /* Issue the command to the hardware */
1329 mtip_issue_non_ncq_command(port
, MTIP_TAG_INTERNAL
);
1331 /* Poll if atomic, wait_for_completion otherwise */
1332 if (atomic
== GFP_KERNEL
) {
1333 /* Wait for the command to complete or timeout. */
1334 if (wait_for_completion_timeout(
1336 msecs_to_jiffies(timeout
)) == 0) {
1337 dev_err(&port
->dd
->pdev
->dev
,
1338 "Internal command did not complete [%d] "
1339 "within timeout of %lu ms\n",
1341 if (mtip_check_surprise_removal(port
->dd
->pdev
) ||
1342 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1343 &port
->dd
->dd_flag
)) {
1350 /* Spin for <timeout> checking if command still outstanding */
1351 timeout
= jiffies
+ msecs_to_jiffies(timeout
);
1352 while ((readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1353 & (1 << MTIP_TAG_INTERNAL
))
1354 && time_before(jiffies
, timeout
)) {
1355 if (mtip_check_surprise_removal(port
->dd
->pdev
)) {
1359 if ((fis
->command
!= ATA_CMD_STANDBYNOW1
) &&
1360 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1361 &port
->dd
->dd_flag
)) {
1365 if (readl(port
->mmio
+ PORT_IRQ_STAT
) & PORT_IRQ_ERR
) {
1366 atomic_inc(&int_cmd
->active
); /* error */
1372 if (atomic_read(&int_cmd
->active
) > 1) {
1373 dev_err(&port
->dd
->pdev
->dev
,
1374 "Internal command [%02X] failed\n", fis
->command
);
1377 if (readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1378 & (1 << MTIP_TAG_INTERNAL
)) {
1380 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1381 &port
->dd
->dd_flag
)) {
1382 mtip_restart_port(port
);
1387 /* Clear the allocated and active bits for the internal command. */
1388 atomic_set(&int_cmd
->active
, 0);
1389 release_slot(port
, MTIP_TAG_INTERNAL
);
1390 if (rv
>= 0 && mtip_pause_ncq(port
, fis
)) {
1394 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1395 wake_up_interruptible(&port
->svc_wait
);
1401 * Byte-swap ATA ID strings.
1403 * ATA identify data contains strings in byte-swapped 16-bit words.
1404 * They must be swapped (on all architectures) to be usable as C strings.
1405 * This function swaps bytes in-place.
1407 * @buf The buffer location of the string
1408 * @len The number of bytes to swap
1413 static inline void ata_swap_string(u16
*buf
, unsigned int len
)
1416 for (i
= 0; i
< (len
/2); i
++)
1417 be16_to_cpus(&buf
[i
]);
1421 * Request the device identity information.
1423 * If a user space buffer is not specified, i.e. is NULL, the
1424 * identify information is still read from the drive and placed
1425 * into the identify data buffer (@e port->identify) in the
1426 * port data structure.
1427 * When the identify buffer contains valid identify information @e
1428 * port->identify_valid is non-zero.
1430 * @port Pointer to the port structure.
1431 * @user_buffer A user space buffer where the identify data should be
1435 * 0 Command completed successfully.
1436 * -EFAULT An error occurred while coping data to the user buffer.
1437 * -1 Command failed.
1439 static int mtip_get_identify(struct mtip_port
*port
, void __user
*user_buffer
)
1442 struct host_to_dev_fis fis
;
1444 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1447 /* Build the FIS. */
1448 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1451 fis
.command
= ATA_CMD_ID_ATA
;
1453 /* Set the identify information as invalid. */
1454 port
->identify_valid
= 0;
1456 /* Clear the identify information. */
1457 memset(port
->identify
, 0, sizeof(u16
) * ATA_ID_WORDS
);
1459 /* Execute the command. */
1460 if (mtip_exec_internal_command(port
,
1464 sizeof(u16
) * ATA_ID_WORDS
,
1467 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
)
1474 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1475 * perform field-sensitive swapping on the string fields.
1476 * See the kernel use of ata_id_string() for proof of this.
1478 #ifdef __LITTLE_ENDIAN
1479 ata_swap_string(port
->identify
+ 27, 40); /* model string*/
1480 ata_swap_string(port
->identify
+ 23, 8); /* firmware string*/
1481 ata_swap_string(port
->identify
+ 10, 20); /* serial# string*/
1485 for (i
= 0; i
< ATA_ID_WORDS
; i
++)
1486 port
->identify
[i
] = le16_to_cpu(port
->identify
[i
]);
1490 /* Set the identify buffer as valid. */
1491 port
->identify_valid
= 1;
1497 ATA_ID_WORDS
* sizeof(u16
))) {
1508 * Issue a standby immediate command to the device.
1510 * @port Pointer to the port structure.
1513 * 0 Command was executed successfully.
1514 * -1 An error occurred while executing the command.
1516 static int mtip_standby_immediate(struct mtip_port
*port
)
1519 struct host_to_dev_fis fis
;
1520 unsigned long start
;
1522 /* Build the FIS. */
1523 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1526 fis
.command
= ATA_CMD_STANDBYNOW1
;
1529 rv
= mtip_exec_internal_command(port
,
1537 dbg_printk(MTIP_DRV_NAME
"Time taken to complete standby cmd: %d ms\n",
1538 jiffies_to_msecs(jiffies
- start
));
1540 dev_warn(&port
->dd
->pdev
->dev
,
1541 "STANDBY IMMEDIATE command failed.\n");
1547 * Issue a READ LOG EXT command to the device.
1549 * @port pointer to the port structure.
1550 * @page page number to fetch
1551 * @buffer pointer to buffer
1552 * @buffer_dma dma address corresponding to @buffer
1553 * @sectors page length to fetch, in sectors
1556 * @rv return value from mtip_exec_internal_command()
1558 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
1559 dma_addr_t buffer_dma
, unsigned int sectors
)
1561 struct host_to_dev_fis fis
;
1563 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1566 fis
.command
= ATA_CMD_READ_LOG_EXT
;
1567 fis
.sect_count
= sectors
& 0xFF;
1568 fis
.sect_cnt_ex
= (sectors
>> 8) & 0xFF;
1571 fis
.device
= ATA_DEVICE_OBS
;
1573 memset(buffer
, 0, sectors
* ATA_SECT_SIZE
);
1575 return mtip_exec_internal_command(port
,
1579 sectors
* ATA_SECT_SIZE
,
1582 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
);
1586 * Issue a SMART READ DATA command to the device.
1588 * @port pointer to the port structure.
1589 * @buffer pointer to buffer
1590 * @buffer_dma dma address corresponding to @buffer
1593 * @rv return value from mtip_exec_internal_command()
1595 static int mtip_get_smart_data(struct mtip_port
*port
, u8
*buffer
,
1596 dma_addr_t buffer_dma
)
1598 struct host_to_dev_fis fis
;
1600 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1603 fis
.command
= ATA_CMD_SMART
;
1604 fis
.features
= 0xD0;
1608 fis
.device
= ATA_DEVICE_OBS
;
1610 return mtip_exec_internal_command(port
,
1621 * Get the value of a smart attribute
1623 * @port pointer to the port structure
1624 * @id attribute number
1625 * @attrib pointer to return attrib information corresponding to @id
1628 * -EINVAL NULL buffer passed or unsupported attribute @id.
1629 * -EPERM Identify data not valid, SMART not supported or not enabled
1631 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
1632 struct smart_attr
*attrib
)
1635 struct smart_attr
*pattr
;
1640 if (!port
->identify_valid
) {
1641 dev_warn(&port
->dd
->pdev
->dev
, "IDENTIFY DATA not valid\n");
1644 if (!(port
->identify
[82] & 0x1)) {
1645 dev_warn(&port
->dd
->pdev
->dev
, "SMART not supported\n");
1648 if (!(port
->identify
[85] & 0x1)) {
1649 dev_warn(&port
->dd
->pdev
->dev
, "SMART not enabled\n");
1653 memset(port
->smart_buf
, 0, ATA_SECT_SIZE
);
1654 rv
= mtip_get_smart_data(port
, port
->smart_buf
, port
->smart_buf_dma
);
1656 dev_warn(&port
->dd
->pdev
->dev
, "Failed to ge SMART data\n");
1660 pattr
= (struct smart_attr
*)(port
->smart_buf
+ 2);
1661 for (i
= 0; i
< 29; i
++, pattr
++)
1662 if (pattr
->attr_id
== id
) {
1663 memcpy(attrib
, pattr
, sizeof(struct smart_attr
));
1668 dev_warn(&port
->dd
->pdev
->dev
,
1669 "Query for invalid SMART attribute ID\n");
1677 * Get the drive capacity.
1679 * @dd Pointer to the device data structure.
1680 * @sectors Pointer to the variable that will receive the sector count.
1683 * 1 Capacity was returned successfully.
1684 * 0 The identify information is invalid.
1686 static bool mtip_hw_get_capacity(struct driver_data
*dd
, sector_t
*sectors
)
1688 struct mtip_port
*port
= dd
->port
;
1689 u64 total
, raw0
, raw1
, raw2
, raw3
;
1690 raw0
= port
->identify
[100];
1691 raw1
= port
->identify
[101];
1692 raw2
= port
->identify
[102];
1693 raw3
= port
->identify
[103];
1694 total
= raw0
| raw1
<<16 | raw2
<<32 | raw3
<<48;
1696 return (bool) !!port
->identify_valid
;
1702 * Resets the HBA by setting the HBA Reset bit in the Global
1703 * HBA Control register. After setting the HBA Reset bit the
1704 * function waits for 1 second before reading the HBA Reset
1705 * bit to make sure it has cleared. If HBA Reset is not clear
1706 * an error is returned. Cannot be used in non-blockable
1709 * @dd Pointer to the driver data structure.
1712 * 0 The reset was successful.
1713 * -1 The HBA Reset bit did not clear.
1715 static int mtip_hba_reset(struct driver_data
*dd
)
1717 mtip_deinit_port(dd
->port
);
1719 /* Set the reset bit */
1720 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
1723 readl(dd
->mmio
+ HOST_CTL
);
1725 /* Wait for reset to clear */
1728 /* Check the bit has cleared */
1729 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
) {
1730 dev_err(&dd
->pdev
->dev
,
1731 "Reset bit did not clear.\n");
1739 * Display the identify command data.
1741 * @port Pointer to the port data structure.
1746 static void mtip_dump_identify(struct mtip_port
*port
)
1749 unsigned short revid
;
1752 if (!port
->identify_valid
)
1755 strlcpy(cbuf
, (char *)(port
->identify
+10), 21);
1756 dev_info(&port
->dd
->pdev
->dev
,
1757 "Serial No.: %s\n", cbuf
);
1759 strlcpy(cbuf
, (char *)(port
->identify
+23), 9);
1760 dev_info(&port
->dd
->pdev
->dev
,
1761 "Firmware Ver.: %s\n", cbuf
);
1763 strlcpy(cbuf
, (char *)(port
->identify
+27), 41);
1764 dev_info(&port
->dd
->pdev
->dev
, "Model: %s\n", cbuf
);
1766 if (mtip_hw_get_capacity(port
->dd
, §ors
))
1767 dev_info(&port
->dd
->pdev
->dev
,
1768 "Capacity: %llu sectors (%llu MB)\n",
1770 ((u64
)sectors
) * ATA_SECT_SIZE
>> 20);
1772 pci_read_config_word(port
->dd
->pdev
, PCI_REVISION_ID
, &revid
);
1773 switch (revid
& 0xFF) {
1775 strlcpy(cbuf
, "A0", 3);
1778 strlcpy(cbuf
, "A2", 3);
1781 strlcpy(cbuf
, "?", 2);
1784 dev_info(&port
->dd
->pdev
->dev
,
1785 "Card Type: %s\n", cbuf
);
1789 * Map the commands scatter list into the command table.
1791 * @command Pointer to the command.
1792 * @nents Number of scatter list entries.
1797 static inline void fill_command_sg(struct driver_data
*dd
,
1798 struct mtip_cmd
*command
,
1802 unsigned int dma_len
;
1803 struct mtip_cmd_sg
*command_sg
;
1804 struct scatterlist
*sg
= command
->sg
;
1806 command_sg
= command
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1808 for (n
= 0; n
< nents
; n
++) {
1809 dma_len
= sg_dma_len(sg
);
1810 if (dma_len
> 0x400000)
1811 dev_err(&dd
->pdev
->dev
,
1812 "DMA segment length truncated\n");
1813 command_sg
->info
= __force_bit2int
1814 cpu_to_le32((dma_len
-1) & 0x3FFFFF);
1815 command_sg
->dba
= __force_bit2int
1816 cpu_to_le32(sg_dma_address(sg
));
1817 command_sg
->dba_upper
= __force_bit2int
1818 cpu_to_le32((sg_dma_address(sg
) >> 16) >> 16);
1825 * @brief Execute a drive command.
1827 * return value 0 The command completed successfully.
1828 * return value -1 An error occurred while executing the command.
1830 static int exec_drive_task(struct mtip_port
*port
, u8
*command
)
1832 struct host_to_dev_fis fis
;
1833 struct host_to_dev_fis
*reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1835 /* Build the FIS. */
1836 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1839 fis
.command
= command
[0];
1840 fis
.features
= command
[1];
1841 fis
.sect_count
= command
[2];
1842 fis
.sector
= command
[3];
1843 fis
.cyl_low
= command
[4];
1844 fis
.cyl_hi
= command
[5];
1845 fis
.device
= command
[6] & ~0x10; /* Clear the dev bit*/
1847 dbg_printk(MTIP_DRV_NAME
" %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
1857 /* Execute the command. */
1858 if (mtip_exec_internal_command(port
,
1865 MTIP_IOCTL_COMMAND_TIMEOUT_MS
) < 0) {
1869 command
[0] = reply
->command
; /* Status*/
1870 command
[1] = reply
->features
; /* Error*/
1871 command
[4] = reply
->cyl_low
;
1872 command
[5] = reply
->cyl_hi
;
1874 dbg_printk(MTIP_DRV_NAME
" %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
1885 * @brief Execute a drive command.
1887 * @param port Pointer to the port data structure.
1888 * @param command Pointer to the user specified command parameters.
1889 * @param user_buffer Pointer to the user space buffer where read sector
1890 * data should be copied.
1892 * return value 0 The command completed successfully.
1893 * return value -EFAULT An error occurred while copying the completion
1894 * data to the user space buffer.
1895 * return value -1 An error occurred while executing the command.
1897 static int exec_drive_command(struct mtip_port
*port
, u8
*command
,
1898 void __user
*user_buffer
)
1900 struct host_to_dev_fis fis
;
1901 struct host_to_dev_fis
*reply
;
1903 dma_addr_t dma_addr
= 0;
1904 int rv
= 0, xfer_sz
= command
[3];
1910 buf
= dmam_alloc_coherent(&port
->dd
->pdev
->dev
,
1911 ATA_SECT_SIZE
* xfer_sz
,
1915 dev_err(&port
->dd
->pdev
->dev
,
1916 "Memory allocation failed (%d bytes)\n",
1917 ATA_SECT_SIZE
* xfer_sz
);
1920 memset(buf
, 0, ATA_SECT_SIZE
* xfer_sz
);
1923 /* Build the FIS. */
1924 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1927 fis
.command
= command
[0];
1928 fis
.features
= command
[2];
1929 fis
.sect_count
= command
[3];
1930 if (fis
.command
== ATA_CMD_SMART
) {
1931 fis
.sector
= command
[1];
1937 reply
= (port
->rxfis
+ RX_FIS_PIO_SETUP
);
1939 reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1941 dbg_printk(MTIP_DRV_NAME
1942 " %s: User Command: cmd %x, sect %x, "
1943 "feat %x, sectcnt %x\n",
1950 /* Execute the command. */
1951 if (mtip_exec_internal_command(port
,
1954 (xfer_sz
? dma_addr
: 0),
1955 (xfer_sz
? ATA_SECT_SIZE
* xfer_sz
: 0),
1958 MTIP_IOCTL_COMMAND_TIMEOUT_MS
)
1961 goto exit_drive_command
;
1964 /* Collect the completion status. */
1965 command
[0] = reply
->command
; /* Status*/
1966 command
[1] = reply
->features
; /* Error*/
1967 command
[2] = reply
->sect_count
;
1969 dbg_printk(MTIP_DRV_NAME
1970 " %s: Completion Status: stat %x, "
1971 "err %x, nsect %x\n",
1978 if (copy_to_user(user_buffer
,
1980 ATA_SECT_SIZE
* command
[3])) {
1982 goto exit_drive_command
;
1987 dmam_free_coherent(&port
->dd
->pdev
->dev
,
1988 ATA_SECT_SIZE
* xfer_sz
, buf
, dma_addr
);
1993 * Indicates whether a command has a single sector payload.
1995 * @command passed to the device to perform the certain event.
1996 * @features passed to the device to perform the certain event.
1999 * 1 command is one that always has a single sector payload,
2000 * regardless of the value in the Sector Count field.
2004 static unsigned int implicit_sector(unsigned char command
,
2005 unsigned char features
)
2007 unsigned int rv
= 0;
2009 /* list of commands that have an implicit sector count of 1 */
2011 case ATA_CMD_SEC_SET_PASS
:
2012 case ATA_CMD_SEC_UNLOCK
:
2013 case ATA_CMD_SEC_ERASE_PREP
:
2014 case ATA_CMD_SEC_ERASE_UNIT
:
2015 case ATA_CMD_SEC_FREEZE_LOCK
:
2016 case ATA_CMD_SEC_DISABLE_PASS
:
2017 case ATA_CMD_PMP_READ
:
2018 case ATA_CMD_PMP_WRITE
:
2021 case ATA_CMD_SET_MAX
:
2022 if (features
== ATA_SET_MAX_UNLOCK
)
2026 if ((features
== ATA_SMART_READ_VALUES
) ||
2027 (features
== ATA_SMART_READ_THRESHOLDS
))
2030 case ATA_CMD_CONF_OVERLAY
:
2031 if ((features
== ATA_DCO_IDENTIFY
) ||
2032 (features
== ATA_DCO_SET
))
2039 static void mtip_set_timeout(struct host_to_dev_fis
*fis
, unsigned int *timeout
)
2041 switch (fis
->command
) {
2042 case ATA_CMD_DOWNLOAD_MICRO
:
2043 *timeout
= 120000; /* 2 minutes */
2045 case ATA_CMD_SEC_ERASE_UNIT
:
2047 *timeout
= 240000; /* 4 minutes */
2049 case ATA_CMD_STANDBYNOW1
:
2050 *timeout
= 120000; /* 2 minutes */
2054 *timeout
= 60000; /* 60 seconds */
2057 *timeout
= 15000; /* 15 seconds */
2060 *timeout
= MTIP_IOCTL_COMMAND_TIMEOUT_MS
;
2066 * Executes a taskfile
2067 * See ide_taskfile_ioctl() for derivation
2069 static int exec_drive_taskfile(struct driver_data
*dd
,
2071 ide_task_request_t
*req_task
,
2074 struct host_to_dev_fis fis
;
2075 struct host_to_dev_fis
*reply
;
2078 dma_addr_t outbuf_dma
= 0;
2079 dma_addr_t inbuf_dma
= 0;
2080 dma_addr_t dma_buffer
= 0;
2082 unsigned int taskin
= 0;
2083 unsigned int taskout
= 0;
2085 unsigned int timeout
;
2086 unsigned int force_single_sector
;
2087 unsigned int transfer_size
;
2088 unsigned long task_file_data
;
2089 int intotal
= outtotal
+ req_task
->out_size
;
2091 taskout
= req_task
->out_size
;
2092 taskin
= req_task
->in_size
;
2093 /* 130560 = 512 * 0xFF*/
2094 if (taskin
> 130560 || taskout
> 130560) {
2100 outbuf
= kzalloc(taskout
, GFP_KERNEL
);
2101 if (outbuf
== NULL
) {
2105 if (copy_from_user(outbuf
, buf
+ outtotal
, taskout
)) {
2109 outbuf_dma
= pci_map_single(dd
->pdev
,
2113 if (outbuf_dma
== 0) {
2117 dma_buffer
= outbuf_dma
;
2121 inbuf
= kzalloc(taskin
, GFP_KERNEL
);
2122 if (inbuf
== NULL
) {
2127 if (copy_from_user(inbuf
, buf
+ intotal
, taskin
)) {
2131 inbuf_dma
= pci_map_single(dd
->pdev
,
2133 taskin
, DMA_FROM_DEVICE
);
2134 if (inbuf_dma
== 0) {
2138 dma_buffer
= inbuf_dma
;
2141 /* only supports PIO and non-data commands from this ioctl. */
2142 switch (req_task
->data_phase
) {
2144 nsect
= taskout
/ ATA_SECT_SIZE
;
2145 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2148 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2150 case TASKFILE_NO_DATA
:
2151 reply
= (dd
->port
->rxfis
+ RX_FIS_D2H_REG
);
2158 /* Build the FIS. */
2159 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
2163 fis
.command
= req_task
->io_ports
[7];
2164 fis
.features
= req_task
->io_ports
[1];
2165 fis
.sect_count
= req_task
->io_ports
[2];
2166 fis
.lba_low
= req_task
->io_ports
[3];
2167 fis
.lba_mid
= req_task
->io_ports
[4];
2168 fis
.lba_hi
= req_task
->io_ports
[5];
2169 /* Clear the dev bit*/
2170 fis
.device
= req_task
->io_ports
[6] & ~0x10;
2172 if ((req_task
->in_flags
.all
== 0) && (req_task
->out_flags
.all
& 1)) {
2173 req_task
->in_flags
.all
=
2174 IDE_TASKFILE_STD_IN_FLAGS
|
2175 (IDE_HOB_STD_IN_FLAGS
<< 8);
2176 fis
.lba_low_ex
= req_task
->hob_ports
[3];
2177 fis
.lba_mid_ex
= req_task
->hob_ports
[4];
2178 fis
.lba_hi_ex
= req_task
->hob_ports
[5];
2179 fis
.features_ex
= req_task
->hob_ports
[1];
2180 fis
.sect_cnt_ex
= req_task
->hob_ports
[2];
2183 req_task
->in_flags
.all
= IDE_TASKFILE_STD_IN_FLAGS
;
2186 force_single_sector
= implicit_sector(fis
.command
, fis
.features
);
2188 if ((taskin
|| taskout
) && (!fis
.sect_count
)) {
2190 fis
.sect_count
= nsect
;
2192 if (!force_single_sector
) {
2193 dev_warn(&dd
->pdev
->dev
,
2194 "data movement but "
2195 "sect_count is 0\n");
2202 dbg_printk(MTIP_DRV_NAME
2203 " %s: cmd %x, feat %x, nsect %x,"
2204 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
2215 mtip_set_timeout(&fis
, &timeout
);
2217 /* Determine the correct transfer size.*/
2218 if (force_single_sector
)
2219 transfer_size
= ATA_SECT_SIZE
;
2221 transfer_size
= ATA_SECT_SIZE
* fis
.sect_count
;
2223 /* Execute the command.*/
2224 if (mtip_exec_internal_command(dd
->port
,
2236 task_file_data
= readl(dd
->port
->mmio
+PORT_TFDATA
);
2238 if ((req_task
->data_phase
== TASKFILE_IN
) && !(task_file_data
& 1)) {
2239 reply
= dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
;
2240 req_task
->io_ports
[7] = reply
->control
;
2242 reply
= dd
->port
->rxfis
+ RX_FIS_D2H_REG
;
2243 req_task
->io_ports
[7] = reply
->command
;
2246 /* reclaim the DMA buffers.*/
2248 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2249 taskin
, DMA_FROM_DEVICE
);
2251 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2252 taskout
, DMA_TO_DEVICE
);
2256 /* return the ATA registers to the caller.*/
2257 req_task
->io_ports
[1] = reply
->features
;
2258 req_task
->io_ports
[2] = reply
->sect_count
;
2259 req_task
->io_ports
[3] = reply
->lba_low
;
2260 req_task
->io_ports
[4] = reply
->lba_mid
;
2261 req_task
->io_ports
[5] = reply
->lba_hi
;
2262 req_task
->io_ports
[6] = reply
->device
;
2264 if (req_task
->out_flags
.all
& 1) {
2266 req_task
->hob_ports
[3] = reply
->lba_low_ex
;
2267 req_task
->hob_ports
[4] = reply
->lba_mid_ex
;
2268 req_task
->hob_ports
[5] = reply
->lba_hi_ex
;
2269 req_task
->hob_ports
[1] = reply
->features_ex
;
2270 req_task
->hob_ports
[2] = reply
->sect_cnt_ex
;
2272 dbg_printk(MTIP_DRV_NAME
2273 " %s: Completion: stat %x,"
2274 "err %x, sect_cnt %x, lbalo %x,"
2275 "lbamid %x, lbahi %x, dev %x\n",
2277 req_task
->io_ports
[7],
2278 req_task
->io_ports
[1],
2279 req_task
->io_ports
[2],
2280 req_task
->io_ports
[3],
2281 req_task
->io_ports
[4],
2282 req_task
->io_ports
[5],
2283 req_task
->io_ports
[6]);
2286 if (copy_to_user(buf
+ outtotal
, outbuf
, taskout
)) {
2292 if (copy_to_user(buf
+ intotal
, inbuf
, taskin
)) {
2299 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2300 taskin
, DMA_FROM_DEVICE
);
2302 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2303 taskout
, DMA_TO_DEVICE
);
2311 * Handle IOCTL calls from the Block Layer.
2313 * This function is called by the Block Layer when it receives an IOCTL
2314 * command that it does not understand. If the IOCTL command is not supported
2315 * this function returns -ENOTTY.
2317 * @dd Pointer to the driver data structure.
2318 * @cmd IOCTL command passed from the Block Layer.
2319 * @arg IOCTL argument passed from the Block Layer.
2322 * 0 The IOCTL completed successfully.
2323 * -ENOTTY The specified command is not supported.
2324 * -EFAULT An error occurred copying data to a user space buffer.
2325 * -EIO An error occurred while executing the command.
2327 static int mtip_hw_ioctl(struct driver_data
*dd
, unsigned int cmd
,
2331 case HDIO_GET_IDENTITY
:
2333 if (copy_to_user((void __user
*)arg
, dd
->port
->identify
,
2334 sizeof(u16
) * ATA_ID_WORDS
))
2338 case HDIO_DRIVE_CMD
:
2340 u8 drive_command
[4];
2342 /* Copy the user command info to our buffer. */
2343 if (copy_from_user(drive_command
,
2344 (void __user
*) arg
,
2345 sizeof(drive_command
)))
2348 /* Execute the drive command. */
2349 if (exec_drive_command(dd
->port
,
2351 (void __user
*) (arg
+4)))
2354 /* Copy the status back to the users buffer. */
2355 if (copy_to_user((void __user
*) arg
,
2357 sizeof(drive_command
)))
2362 case HDIO_DRIVE_TASK
:
2364 u8 drive_command
[7];
2366 /* Copy the user command info to our buffer. */
2367 if (copy_from_user(drive_command
,
2368 (void __user
*) arg
,
2369 sizeof(drive_command
)))
2372 /* Execute the drive command. */
2373 if (exec_drive_task(dd
->port
, drive_command
))
2376 /* Copy the status back to the users buffer. */
2377 if (copy_to_user((void __user
*) arg
,
2379 sizeof(drive_command
)))
2384 case HDIO_DRIVE_TASKFILE
: {
2385 ide_task_request_t req_task
;
2388 if (copy_from_user(&req_task
, (void __user
*) arg
,
2392 outtotal
= sizeof(req_task
);
2394 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
2395 &req_task
, outtotal
);
2397 if (copy_to_user((void __user
*) arg
, &req_task
,
2411 * Submit an IO to the hw
2413 * This function is called by the block layer to issue an io
2414 * to the device. Upon completion, the callback function will
2415 * be called with the data parameter passed as the callback data.
2417 * @dd Pointer to the driver data structure.
2418 * @start First sector to read.
2419 * @nsect Number of sectors to read.
2420 * @nents Number of entries in scatter list for the read command.
2421 * @tag The tag of this read command.
2422 * @callback Pointer to the function that should be called
2423 * when the read completes.
2424 * @data Callback data passed to the callback function
2425 * when the read completes.
2426 * @dir Direction (read or write)
2431 static void mtip_hw_submit_io(struct driver_data
*dd
, sector_t start
,
2432 int nsect
, int nents
, int tag
, void *callback
,
2433 void *data
, int dir
)
2435 struct host_to_dev_fis
*fis
;
2436 struct mtip_port
*port
= dd
->port
;
2437 struct mtip_cmd
*command
= &port
->commands
[tag
];
2438 int dma_dir
= (dir
== READ
) ? DMA_FROM_DEVICE
: DMA_TO_DEVICE
;
2440 /* Map the scatter list for DMA access */
2441 nents
= dma_map_sg(&dd
->pdev
->dev
, command
->sg
, nents
, dma_dir
);
2443 command
->scatter_ents
= nents
;
2446 * The number of retries for this command before it is
2447 * reported as a failure to the upper layers.
2449 command
->retries
= MTIP_MAX_RETRIES
;
2452 fis
= command
->command
;
2456 (dir
== READ
? ATA_CMD_FPDMA_READ
: ATA_CMD_FPDMA_WRITE
);
2457 *((unsigned int *) &fis
->lba_low
) = (start
& 0xFFFFFF);
2458 *((unsigned int *) &fis
->lba_low_ex
) = ((start
>> 24) & 0xFFFFFF);
2459 fis
->device
= 1 << 6;
2460 fis
->features
= nsect
& 0xFF;
2461 fis
->features_ex
= (nsect
>> 8) & 0xFF;
2462 fis
->sect_count
= ((tag
<< 3) | (tag
>> 5));
2463 fis
->sect_cnt_ex
= 0;
2467 fill_command_sg(dd
, command
, nents
);
2469 /* Populate the command header */
2470 command
->command_header
->opts
=
2471 __force_bit2int
cpu_to_le32(
2472 (nents
<< 16) | 5 | AHCI_CMD_PREFETCH
);
2473 command
->command_header
->byte_count
= 0;
2476 * Set the completion function and data for the command
2477 * within this layer.
2479 command
->comp_data
= dd
;
2480 command
->comp_func
= mtip_async_complete
;
2481 command
->direction
= dma_dir
;
2484 * Set the completion function and data for the command passed
2485 * from the upper layer.
2487 command
->async_data
= data
;
2488 command
->async_callback
= callback
;
2491 * To prevent this command from being issued
2492 * if an internal command is in progress or error handling is active.
2494 if (port
->flags
& MTIP_PF_PAUSE_IO
) {
2495 set_bit(tag
, port
->cmds_to_issue
);
2496 set_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2500 /* Issue the command to the hardware */
2501 mtip_issue_ncq_command(port
, tag
);
2507 * Release a command slot.
2509 * @dd Pointer to the driver data structure.
2515 static void mtip_hw_release_scatterlist(struct driver_data
*dd
, int tag
)
2517 release_slot(dd
->port
, tag
);
2521 * Obtain a command slot and return its associated scatter list.
2523 * @dd Pointer to the driver data structure.
2524 * @tag Pointer to an int that will receive the allocated command
2528 * Pointer to the scatter list for the allocated command slot
2529 * or NULL if no command slots are available.
2531 static struct scatterlist
*mtip_hw_get_scatterlist(struct driver_data
*dd
,
2535 * It is possible that, even with this semaphore, a thread
2536 * may think that no command slots are available. Therefore, we
2537 * need to make an attempt to get_slot().
2539 down(&dd
->port
->cmd_slot
);
2540 *tag
= get_slot(dd
->port
);
2542 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
2543 up(&dd
->port
->cmd_slot
);
2546 if (unlikely(*tag
< 0)) {
2547 up(&dd
->port
->cmd_slot
);
2551 return dd
->port
->commands
[*tag
].sg
;
2555 * Sysfs status dump.
2557 * @dev Pointer to the device structure, passed by the kernrel.
2558 * @attr Pointer to the device_attribute structure passed by the kernel.
2559 * @buf Pointer to the char buffer that will receive the stats info.
2562 * The size, in bytes, of the data copied into buf.
2564 static ssize_t
mtip_hw_show_status(struct device
*dev
,
2565 struct device_attribute
*attr
,
2568 struct driver_data
*dd
= dev_to_disk(dev
)->private_data
;
2571 if (test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))
2572 size
+= sprintf(buf
, "%s", "thermal_shutdown\n");
2573 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
))
2574 size
+= sprintf(buf
, "%s", "write_protect\n");
2576 size
+= sprintf(buf
, "%s", "online\n");
2581 static DEVICE_ATTR(status
, S_IRUGO
, mtip_hw_show_status
, NULL
);
2583 static ssize_t
mtip_hw_read_registers(struct file
*f
, char __user
*ubuf
,
2584 size_t len
, loff_t
*offset
)
2586 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2587 char buf
[MTIP_DFS_MAX_BUF_SIZE
];
2588 u32 group_allocated
;
2595 size
+= sprintf(&buf
[size
], "H/ S ACTive : [ 0x");
2597 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2598 size
+= sprintf(&buf
[size
], "%08X ",
2599 readl(dd
->port
->s_active
[n
]));
2601 size
+= sprintf(&buf
[size
], "]\n");
2602 size
+= sprintf(&buf
[size
], "H/ Command Issue : [ 0x");
2604 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2605 size
+= sprintf(&buf
[size
], "%08X ",
2606 readl(dd
->port
->cmd_issue
[n
]));
2608 size
+= sprintf(&buf
[size
], "]\n");
2609 size
+= sprintf(&buf
[size
], "H/ Completed : [ 0x");
2611 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2612 size
+= sprintf(&buf
[size
], "%08X ",
2613 readl(dd
->port
->completed
[n
]));
2615 size
+= sprintf(&buf
[size
], "]\n");
2616 size
+= sprintf(&buf
[size
], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
2617 readl(dd
->port
->mmio
+ PORT_IRQ_STAT
));
2618 size
+= sprintf(&buf
[size
], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
2619 readl(dd
->mmio
+ HOST_IRQ_STAT
));
2620 size
+= sprintf(&buf
[size
], "\n");
2622 size
+= sprintf(&buf
[size
], "L/ Allocated : [ 0x");
2624 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2625 if (sizeof(long) > sizeof(u32
))
2627 dd
->port
->allocated
[n
/2] >> (32*(n
&1));
2629 group_allocated
= dd
->port
->allocated
[n
];
2630 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2632 size
+= sprintf(&buf
[size
], "]\n");
2634 size
+= sprintf(&buf
[size
], "L/ Commands in Q : [ 0x");
2636 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2637 if (sizeof(long) > sizeof(u32
))
2639 dd
->port
->cmds_to_issue
[n
/2] >> (32*(n
&1));
2641 group_allocated
= dd
->port
->cmds_to_issue
[n
];
2642 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2644 size
+= sprintf(&buf
[size
], "]\n");
2646 *offset
= size
<= len
? size
: len
;
2647 size
= copy_to_user(ubuf
, buf
, *offset
);
2654 static ssize_t
mtip_hw_read_flags(struct file
*f
, char __user
*ubuf
,
2655 size_t len
, loff_t
*offset
)
2657 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2658 char buf
[MTIP_DFS_MAX_BUF_SIZE
];
2664 size
+= sprintf(&buf
[size
], "Flag-port : [ %08lX ]\n",
2666 size
+= sprintf(&buf
[size
], "Flag-dd : [ %08lX ]\n",
2669 *offset
= size
<= len
? size
: len
;
2670 size
= copy_to_user(ubuf
, buf
, *offset
);
2677 static const struct file_operations mtip_regs_fops
= {
2678 .owner
= THIS_MODULE
,
2679 .open
= simple_open
,
2680 .read
= mtip_hw_read_registers
,
2681 .llseek
= no_llseek
,
2684 static const struct file_operations mtip_flags_fops
= {
2685 .owner
= THIS_MODULE
,
2686 .open
= simple_open
,
2687 .read
= mtip_hw_read_flags
,
2688 .llseek
= no_llseek
,
2692 * Create the sysfs related attributes.
2694 * @dd Pointer to the driver data structure.
2695 * @kobj Pointer to the kobj for the block device.
2698 * 0 Operation completed successfully.
2699 * -EINVAL Invalid parameter.
2701 static int mtip_hw_sysfs_init(struct driver_data
*dd
, struct kobject
*kobj
)
2706 if (sysfs_create_file(kobj
, &dev_attr_status
.attr
))
2707 dev_warn(&dd
->pdev
->dev
,
2708 "Error creating 'status' sysfs entry\n");
2713 * Remove the sysfs related attributes.
2715 * @dd Pointer to the driver data structure.
2716 * @kobj Pointer to the kobj for the block device.
2719 * 0 Operation completed successfully.
2720 * -EINVAL Invalid parameter.
2722 static int mtip_hw_sysfs_exit(struct driver_data
*dd
, struct kobject
*kobj
)
2727 sysfs_remove_file(kobj
, &dev_attr_status
.attr
);
2732 static int mtip_hw_debugfs_init(struct driver_data
*dd
)
2737 dd
->dfs_node
= debugfs_create_dir(dd
->disk
->disk_name
, dfs_parent
);
2738 if (IS_ERR_OR_NULL(dd
->dfs_node
)) {
2739 dev_warn(&dd
->pdev
->dev
,
2740 "Error creating node %s under debugfs\n",
2741 dd
->disk
->disk_name
);
2742 dd
->dfs_node
= NULL
;
2746 debugfs_create_file("flags", S_IRUGO
, dd
->dfs_node
, dd
,
2748 debugfs_create_file("registers", S_IRUGO
, dd
->dfs_node
, dd
,
2754 static void mtip_hw_debugfs_exit(struct driver_data
*dd
)
2756 debugfs_remove_recursive(dd
->dfs_node
);
2761 * Perform any init/resume time hardware setup
2763 * @dd Pointer to the driver data structure.
2768 static inline void hba_setup(struct driver_data
*dd
)
2771 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2773 /* interrupt bug workaround: use only 1 IS bit.*/
2775 HSORG_DISABLE_SLOTGRP_INTR
|
2776 HSORG_DISABLE_SLOTGRP_PXIS
,
2777 dd
->mmio
+ HOST_HSORG
);
2781 * Detect the details of the product, and store anything needed
2782 * into the driver data structure. This includes product type and
2783 * version and number of slot groups.
2785 * @dd Pointer to the driver data structure.
2790 static void mtip_detect_product(struct driver_data
*dd
)
2793 unsigned int rev
, slotgroups
;
2796 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
2798 * [15:8] hardware/software interface rev#
2799 * [ 3] asic-style interface
2800 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
2802 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2804 dd
->product_type
= MTIP_PRODUCT_UNKNOWN
;
2805 dd
->slot_groups
= 1;
2808 dd
->product_type
= MTIP_PRODUCT_ASICFPGA
;
2809 rev
= (hwdata
& HSORG_HWREV
) >> 8;
2810 slotgroups
= (hwdata
& HSORG_SLOTGROUPS
) + 1;
2811 dev_info(&dd
->pdev
->dev
,
2812 "ASIC-FPGA design, HS rev 0x%x, "
2813 "%i slot groups [%i slots]\n",
2818 if (slotgroups
> MTIP_MAX_SLOT_GROUPS
) {
2819 dev_warn(&dd
->pdev
->dev
,
2820 "Warning: driver only supports "
2821 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS
);
2822 slotgroups
= MTIP_MAX_SLOT_GROUPS
;
2824 dd
->slot_groups
= slotgroups
;
2828 dev_warn(&dd
->pdev
->dev
, "Unrecognized product id\n");
2832 * Blocking wait for FTL rebuild to complete
2834 * @dd Pointer to the DRIVER_DATA structure.
2837 * 0 FTL rebuild completed successfully
2838 * -EFAULT FTL rebuild error/timeout/interruption
2840 static int mtip_ftl_rebuild_poll(struct driver_data
*dd
)
2842 unsigned long timeout
, cnt
= 0, start
;
2844 dev_warn(&dd
->pdev
->dev
,
2845 "FTL rebuild in progress. Polling for completion.\n");
2848 timeout
= jiffies
+ msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS
);
2851 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
2854 if (mtip_check_surprise_removal(dd
->pdev
))
2857 if (mtip_get_identify(dd
->port
, NULL
) < 0)
2860 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
2861 MTIP_FTL_REBUILD_MAGIC
) {
2863 /* Print message every 3 minutes */
2865 dev_warn(&dd
->pdev
->dev
,
2866 "FTL rebuild in progress (%d secs).\n",
2867 jiffies_to_msecs(jiffies
- start
) / 1000);
2871 dev_warn(&dd
->pdev
->dev
,
2872 "FTL rebuild complete (%d secs).\n",
2873 jiffies_to_msecs(jiffies
- start
) / 1000);
2874 mtip_block_initialize(dd
);
2878 } while (time_before(jiffies
, timeout
));
2880 /* Check for timeout */
2881 dev_err(&dd
->pdev
->dev
,
2882 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
2883 jiffies_to_msecs(jiffies
- start
) / 1000);
2888 * service thread to issue queued commands
2890 * @data Pointer to the driver data structure.
2896 static int mtip_service_thread(void *data
)
2898 struct driver_data
*dd
= (struct driver_data
*)data
;
2899 unsigned long slot
, slot_start
, slot_wrap
;
2900 unsigned int num_cmd_slots
= dd
->slot_groups
* 32;
2901 struct mtip_port
*port
= dd
->port
;
2905 * the condition is to check neither an internal command is
2906 * is in progress nor error handling is active
2908 wait_event_interruptible(port
->svc_wait
, (port
->flags
) &&
2909 !(port
->flags
& MTIP_PF_PAUSE_IO
));
2911 if (kthread_should_stop())
2914 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
2918 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
2919 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
2921 /* used to restrict the loop to one iteration */
2922 slot_start
= num_cmd_slots
;
2925 slot
= find_next_bit(port
->cmds_to_issue
,
2926 num_cmd_slots
, slot
);
2927 if (slot_wrap
== 1) {
2928 if ((slot_start
>= slot
) ||
2929 (slot
>= num_cmd_slots
))
2932 if (unlikely(slot_start
== num_cmd_slots
))
2935 if (unlikely(slot
== num_cmd_slots
)) {
2941 /* Issue the command to the hardware */
2942 mtip_issue_ncq_command(port
, slot
);
2944 clear_bit(slot
, port
->cmds_to_issue
);
2947 clear_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2948 } else if (test_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
)) {
2949 if (!mtip_ftl_rebuild_poll(dd
))
2950 set_bit(MTIP_DDF_REBUILD_FAILED_BIT
,
2952 clear_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
);
2954 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
2956 if (test_bit(MTIP_PF_SVC_THD_STOP_BIT
, &port
->flags
))
2963 * Called once for each card.
2965 * @dd Pointer to the driver data structure.
2968 * 0 on success, else an error code.
2970 static int mtip_hw_init(struct driver_data
*dd
)
2974 unsigned int num_command_slots
;
2975 unsigned long timeout
, timetaken
;
2977 struct smart_attr attr242
;
2979 dd
->mmio
= pcim_iomap_table(dd
->pdev
)[MTIP_ABAR
];
2981 mtip_detect_product(dd
);
2982 if (dd
->product_type
== MTIP_PRODUCT_UNKNOWN
) {
2986 num_command_slots
= dd
->slot_groups
* 32;
2990 tasklet_init(&dd
->tasklet
, mtip_tasklet
, (unsigned long)dd
);
2992 dd
->port
= kzalloc(sizeof(struct mtip_port
), GFP_KERNEL
);
2994 dev_err(&dd
->pdev
->dev
,
2995 "Memory allocation: port structure\n");
2999 /* Counting semaphore to track command slot usage */
3000 sema_init(&dd
->port
->cmd_slot
, num_command_slots
- 1);
3002 /* Spinlock to prevent concurrent issue */
3003 spin_lock_init(&dd
->port
->cmd_issue_lock
);
3005 /* Set the port mmio base address. */
3006 dd
->port
->mmio
= dd
->mmio
+ PORT_OFFSET
;
3009 /* Allocate memory for the command list. */
3010 dd
->port
->command_list
=
3011 dmam_alloc_coherent(&dd
->pdev
->dev
,
3012 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3013 &dd
->port
->command_list_dma
,
3015 if (!dd
->port
->command_list
) {
3016 dev_err(&dd
->pdev
->dev
,
3017 "Memory allocation: command list\n");
3022 /* Clear the memory we have allocated. */
3023 memset(dd
->port
->command_list
,
3025 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4));
3027 /* Setup the addresse of the RX FIS. */
3028 dd
->port
->rxfis
= dd
->port
->command_list
+ HW_CMD_SLOT_SZ
;
3029 dd
->port
->rxfis_dma
= dd
->port
->command_list_dma
+ HW_CMD_SLOT_SZ
;
3031 /* Setup the address of the command tables. */
3032 dd
->port
->command_table
= dd
->port
->rxfis
+ AHCI_RX_FIS_SZ
;
3033 dd
->port
->command_tbl_dma
= dd
->port
->rxfis_dma
+ AHCI_RX_FIS_SZ
;
3035 /* Setup the address of the identify data. */
3036 dd
->port
->identify
= dd
->port
->command_table
+
3038 dd
->port
->identify_dma
= dd
->port
->command_tbl_dma
+
3041 /* Setup the address of the sector buffer - for some non-ncq cmds */
3042 dd
->port
->sector_buffer
= (void *) dd
->port
->identify
+ ATA_SECT_SIZE
;
3043 dd
->port
->sector_buffer_dma
= dd
->port
->identify_dma
+ ATA_SECT_SIZE
;
3045 /* Setup the address of the log buf - for read log command */
3046 dd
->port
->log_buf
= (void *)dd
->port
->sector_buffer
+ ATA_SECT_SIZE
;
3047 dd
->port
->log_buf_dma
= dd
->port
->sector_buffer_dma
+ ATA_SECT_SIZE
;
3049 /* Setup the address of the smart buf - for smart read data command */
3050 dd
->port
->smart_buf
= (void *)dd
->port
->log_buf
+ ATA_SECT_SIZE
;
3051 dd
->port
->smart_buf_dma
= dd
->port
->log_buf_dma
+ ATA_SECT_SIZE
;
3054 /* Point the command headers at the command tables. */
3055 for (i
= 0; i
< num_command_slots
; i
++) {
3056 dd
->port
->commands
[i
].command_header
=
3057 dd
->port
->command_list
+
3058 (sizeof(struct mtip_cmd_hdr
) * i
);
3059 dd
->port
->commands
[i
].command_header_dma
=
3060 dd
->port
->command_list_dma
+
3061 (sizeof(struct mtip_cmd_hdr
) * i
);
3063 dd
->port
->commands
[i
].command
=
3064 dd
->port
->command_table
+ (HW_CMD_TBL_SZ
* i
);
3065 dd
->port
->commands
[i
].command_dma
=
3066 dd
->port
->command_tbl_dma
+ (HW_CMD_TBL_SZ
* i
);
3068 if (readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
)
3069 dd
->port
->commands
[i
].command_header
->ctbau
=
3070 __force_bit2int
cpu_to_le32(
3071 (dd
->port
->commands
[i
].command_dma
>> 16) >> 16);
3072 dd
->port
->commands
[i
].command_header
->ctba
=
3073 __force_bit2int
cpu_to_le32(
3074 dd
->port
->commands
[i
].command_dma
& 0xFFFFFFFF);
3077 * If this is not done, a bug is reported by the stock
3078 * FC11 i386. Due to the fact that it has lots of kernel
3079 * debugging enabled.
3081 sg_init_table(dd
->port
->commands
[i
].sg
, MTIP_MAX_SG
);
3083 /* Mark all commands as currently inactive.*/
3084 atomic_set(&dd
->port
->commands
[i
].active
, 0);
3087 /* Setup the pointers to the extended s_active and CI registers. */
3088 for (i
= 0; i
< dd
->slot_groups
; i
++) {
3089 dd
->port
->s_active
[i
] =
3090 dd
->port
->mmio
+ i
*0x80 + PORT_SCR_ACT
;
3091 dd
->port
->cmd_issue
[i
] =
3092 dd
->port
->mmio
+ i
*0x80 + PORT_COMMAND_ISSUE
;
3093 dd
->port
->completed
[i
] =
3094 dd
->port
->mmio
+ i
*0x80 + PORT_SDBV
;
3097 timetaken
= jiffies
;
3098 timeout
= jiffies
+ msecs_to_jiffies(30000);
3099 while (((readl(dd
->port
->mmio
+ PORT_SCR_STAT
) & 0x0F) != 0x03) &&
3100 time_before(jiffies
, timeout
)) {
3103 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
3104 timetaken
= jiffies
- timetaken
;
3105 dev_warn(&dd
->pdev
->dev
,
3106 "Surprise removal detected at %u ms\n",
3107 jiffies_to_msecs(timetaken
));
3111 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
3112 timetaken
= jiffies
- timetaken
;
3113 dev_warn(&dd
->pdev
->dev
,
3114 "Removal detected at %u ms\n",
3115 jiffies_to_msecs(timetaken
));
3120 /* Conditionally reset the HBA. */
3121 if (!(readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_NZDMA
)) {
3122 if (mtip_hba_reset(dd
) < 0) {
3123 dev_err(&dd
->pdev
->dev
,
3124 "Card did not reset within timeout\n");
3129 /* Clear any pending interrupts on the HBA */
3130 writel(readl(dd
->mmio
+ HOST_IRQ_STAT
),
3131 dd
->mmio
+ HOST_IRQ_STAT
);
3134 mtip_init_port(dd
->port
);
3135 mtip_start_port(dd
->port
);
3137 /* Setup the ISR and enable interrupts. */
3138 rv
= devm_request_irq(&dd
->pdev
->dev
,
3142 dev_driver_string(&dd
->pdev
->dev
),
3146 dev_err(&dd
->pdev
->dev
,
3147 "Unable to allocate IRQ %d\n", dd
->pdev
->irq
);
3151 /* Enable interrupts on the HBA. */
3152 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3153 dd
->mmio
+ HOST_CTL
);
3155 init_timer(&dd
->port
->cmd_timer
);
3156 init_waitqueue_head(&dd
->port
->svc_wait
);
3158 dd
->port
->cmd_timer
.data
= (unsigned long int) dd
->port
;
3159 dd
->port
->cmd_timer
.function
= mtip_timeout_function
;
3160 mod_timer(&dd
->port
->cmd_timer
,
3161 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
3164 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)) {
3169 if (mtip_get_identify(dd
->port
, NULL
) < 0) {
3174 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
3175 MTIP_FTL_REBUILD_MAGIC
) {
3176 set_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
);
3177 return MTIP_FTL_REBUILD_MAGIC
;
3179 mtip_dump_identify(dd
->port
);
3181 /* check write protect, over temp and rebuild statuses */
3182 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
3184 dd
->port
->log_buf_dma
, 1);
3186 dev_warn(&dd
->pdev
->dev
,
3187 "Error in READ LOG EXT (10h) command\n");
3188 /* non-critical error, don't fail the load */
3190 buf
= (unsigned char *)dd
->port
->log_buf
;
3191 if (buf
[259] & 0x1) {
3192 dev_info(&dd
->pdev
->dev
,
3193 "Write protect bit is set.\n");
3194 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
3196 if (buf
[288] == 0xF7) {
3197 dev_info(&dd
->pdev
->dev
,
3198 "Exceeded Tmax, drive in thermal shutdown.\n");
3199 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
3201 if (buf
[288] == 0xBF) {
3202 dev_info(&dd
->pdev
->dev
,
3203 "Drive indicates rebuild has failed.\n");
3208 /* get write protect progess */
3209 memset(&attr242
, 0, sizeof(struct smart_attr
));
3210 if (mtip_get_smart_attr(dd
->port
, 242, &attr242
))
3211 dev_warn(&dd
->pdev
->dev
,
3212 "Unable to check write protect progress\n");
3214 dev_info(&dd
->pdev
->dev
,
3215 "Write protect progress: %u%% (%u blocks)\n",
3216 attr242
.cur
, le32_to_cpu(attr242
.data
));
3220 del_timer_sync(&dd
->port
->cmd_timer
);
3222 /* Disable interrupts on the HBA. */
3223 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3224 dd
->mmio
+ HOST_CTL
);
3226 /*Release the IRQ. */
3227 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3230 mtip_deinit_port(dd
->port
);
3232 /* Free the command/command header memory. */
3233 dmam_free_coherent(&dd
->pdev
->dev
,
3234 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3235 dd
->port
->command_list
,
3236 dd
->port
->command_list_dma
);
3238 /* Free the memory allocated for the for structure. */
3245 * Called to deinitialize an interface.
3247 * @dd Pointer to the driver data structure.
3252 static int mtip_hw_exit(struct driver_data
*dd
)
3255 * Send standby immediate (E0h) to the drive so that it
3258 if (!test_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
)) {
3260 if (!test_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
))
3261 if (mtip_standby_immediate(dd
->port
))
3262 dev_warn(&dd
->pdev
->dev
,
3263 "STANDBY IMMEDIATE failed\n");
3265 /* de-initialize the port. */
3266 mtip_deinit_port(dd
->port
);
3268 /* Disable interrupts on the HBA. */
3269 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3270 dd
->mmio
+ HOST_CTL
);
3273 del_timer_sync(&dd
->port
->cmd_timer
);
3275 /* Release the IRQ. */
3276 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3278 /* Stop the bottom half tasklet. */
3279 tasklet_kill(&dd
->tasklet
);
3281 /* Free the command/command header memory. */
3282 dmam_free_coherent(&dd
->pdev
->dev
,
3283 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3284 dd
->port
->command_list
,
3285 dd
->port
->command_list_dma
);
3286 /* Free the memory allocated for the for structure. */
3293 * Issue a Standby Immediate command to the device.
3295 * This function is called by the Block Layer just before the
3296 * system powers off during a shutdown.
3298 * @dd Pointer to the driver data structure.
3303 static int mtip_hw_shutdown(struct driver_data
*dd
)
3306 * Send standby immediate (E0h) to the drive so that it
3309 mtip_standby_immediate(dd
->port
);
3317 * This function is called by the Block Layer just before the
3318 * system hibernates.
3320 * @dd Pointer to the driver data structure.
3323 * 0 Suspend was successful
3324 * -EFAULT Suspend was not successful
3326 static int mtip_hw_suspend(struct driver_data
*dd
)
3329 * Send standby immediate (E0h) to the drive
3330 * so that it saves its state.
3332 if (mtip_standby_immediate(dd
->port
) != 0) {
3333 dev_err(&dd
->pdev
->dev
,
3334 "Failed standby-immediate command\n");
3338 /* Disable interrupts on the HBA.*/
3339 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3340 dd
->mmio
+ HOST_CTL
);
3341 mtip_deinit_port(dd
->port
);
3349 * This function is called by the Block Layer as the
3352 * @dd Pointer to the driver data structure.
3355 * 0 Resume was successful
3356 * -EFAULT Resume was not successful
3358 static int mtip_hw_resume(struct driver_data
*dd
)
3360 /* Perform any needed hardware setup steps */
3364 if (mtip_hba_reset(dd
) != 0) {
3365 dev_err(&dd
->pdev
->dev
,
3366 "Unable to reset the HBA\n");
3371 * Enable the port, DMA engine, and FIS reception specific
3372 * h/w in controller.
3374 mtip_init_port(dd
->port
);
3375 mtip_start_port(dd
->port
);
3377 /* Enable interrupts on the HBA.*/
3378 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3379 dd
->mmio
+ HOST_CTL
);
3385 * Helper function for reusing disk name
3386 * upon hot insertion.
3388 static int rssd_disk_name_format(char *prefix
,
3393 const int base
= 'z' - 'a' + 1;
3394 char *begin
= buf
+ strlen(prefix
);
3395 char *end
= buf
+ buflen
;
3405 *--p
= 'a' + (index
% unit
);
3406 index
= (index
/ unit
) - 1;
3407 } while (index
>= 0);
3409 memmove(begin
, p
, end
- p
);
3410 memcpy(buf
, prefix
, strlen(prefix
));
3416 * Block layer IOCTL handler.
3418 * @dev Pointer to the block_device structure.
3420 * @cmd IOCTL command passed from the user application.
3421 * @arg Argument passed from the user application.
3424 * 0 IOCTL completed successfully.
3425 * -ENOTTY IOCTL not supported or invalid driver data
3426 * structure pointer.
3428 static int mtip_block_ioctl(struct block_device
*dev
,
3433 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3435 if (!capable(CAP_SYS_ADMIN
))
3441 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3448 return mtip_hw_ioctl(dd
, cmd
, arg
);
3452 #ifdef CONFIG_COMPAT
3454 * Block layer compat IOCTL handler.
3456 * @dev Pointer to the block_device structure.
3458 * @cmd IOCTL command passed from the user application.
3459 * @arg Argument passed from the user application.
3462 * 0 IOCTL completed successfully.
3463 * -ENOTTY IOCTL not supported or invalid driver data
3464 * structure pointer.
3466 static int mtip_block_compat_ioctl(struct block_device
*dev
,
3471 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3473 if (!capable(CAP_SYS_ADMIN
))
3479 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3485 case HDIO_DRIVE_TASKFILE
: {
3486 struct mtip_compat_ide_task_request_s __user
*compat_req_task
;
3487 ide_task_request_t req_task
;
3488 int compat_tasksize
, outtotal
, ret
;
3491 sizeof(struct mtip_compat_ide_task_request_s
);
3494 (struct mtip_compat_ide_task_request_s __user
*) arg
;
3496 if (copy_from_user(&req_task
, (void __user
*) arg
,
3497 compat_tasksize
- (2 * sizeof(compat_long_t
))))
3500 if (get_user(req_task
.out_size
, &compat_req_task
->out_size
))
3503 if (get_user(req_task
.in_size
, &compat_req_task
->in_size
))
3506 outtotal
= sizeof(struct mtip_compat_ide_task_request_s
);
3508 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
3509 &req_task
, outtotal
);
3511 if (copy_to_user((void __user
*) arg
, &req_task
,
3513 (2 * sizeof(compat_long_t
))))
3516 if (put_user(req_task
.out_size
, &compat_req_task
->out_size
))
3519 if (put_user(req_task
.in_size
, &compat_req_task
->in_size
))
3525 return mtip_hw_ioctl(dd
, cmd
, arg
);
3531 * Obtain the geometry of the device.
3533 * You may think that this function is obsolete, but some applications,
3534 * fdisk for example still used CHS values. This function describes the
3535 * device as having 224 heads and 56 sectors per cylinder. These values are
3536 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
3537 * partition is described in terms of a start and end cylinder this means
3538 * that each partition is also 4KB aligned. Non-aligned partitions adversely
3539 * affects performance.
3541 * @dev Pointer to the block_device strucutre.
3542 * @geo Pointer to a hd_geometry structure.
3545 * 0 Operation completed successfully.
3546 * -ENOTTY An error occurred while reading the drive capacity.
3548 static int mtip_block_getgeo(struct block_device
*dev
,
3549 struct hd_geometry
*geo
)
3551 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3557 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3558 dev_warn(&dd
->pdev
->dev
,
3559 "Could not get drive capacity.\n");
3565 sector_div(capacity
, (geo
->heads
* geo
->sectors
));
3566 geo
->cylinders
= capacity
;
3571 * Block device operation function.
3573 * This structure contains pointers to the functions required by the block
3576 static const struct block_device_operations mtip_block_ops
= {
3577 .ioctl
= mtip_block_ioctl
,
3578 #ifdef CONFIG_COMPAT
3579 .compat_ioctl
= mtip_block_compat_ioctl
,
3581 .getgeo
= mtip_block_getgeo
,
3582 .owner
= THIS_MODULE
3586 * Block layer make request function.
3588 * This function is called by the kernel to process a BIO for
3591 * @queue Pointer to the request queue. Unused other than to obtain
3592 * the driver data structure.
3593 * @bio Pointer to the BIO.
3596 static void mtip_make_request(struct request_queue
*queue
, struct bio
*bio
)
3598 struct driver_data
*dd
= queue
->queuedata
;
3599 struct scatterlist
*sg
;
3600 struct bio_vec
*bvec
;
3604 if (unlikely(dd
->dd_flag
& MTIP_DDF_STOP_IO
)) {
3605 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
3607 bio_endio(bio
, -ENXIO
);
3610 if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))) {
3611 bio_endio(bio
, -ENODATA
);
3614 if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT
,
3616 bio_data_dir(bio
))) {
3617 bio_endio(bio
, -ENODATA
);
3620 if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT
, &dd
->dd_flag
))) {
3621 bio_endio(bio
, -ENODATA
);
3626 if (unlikely(!bio_has_data(bio
))) {
3627 blk_queue_flush(queue
, 0);
3632 sg
= mtip_hw_get_scatterlist(dd
, &tag
);
3633 if (likely(sg
!= NULL
)) {
3634 blk_queue_bounce(queue
, &bio
);
3636 if (unlikely((bio
)->bi_vcnt
> MTIP_MAX_SG
)) {
3637 dev_warn(&dd
->pdev
->dev
,
3638 "Maximum number of SGL entries exceeded\n");
3640 mtip_hw_release_scatterlist(dd
, tag
);
3644 /* Create the scatter list for this bio. */
3645 bio_for_each_segment(bvec
, bio
, nents
) {
3646 sg_set_page(&sg
[nents
],
3652 /* Issue the read/write. */
3653 mtip_hw_submit_io(dd
,
3666 * Block layer initialization function.
3668 * This function is called once by the PCI layer for each P320
3669 * device that is connected to the system.
3671 * @dd Pointer to the driver data structure.
3674 * 0 on success else an error code.
3676 static int mtip_block_initialize(struct driver_data
*dd
)
3678 int rv
= 0, wait_for_rebuild
= 0;
3680 unsigned int index
= 0;
3681 struct kobject
*kobj
;
3682 unsigned char thd_name
[16];
3685 goto skip_create_disk
; /* hw init done, before rebuild */
3687 /* Initialize the protocol layer. */
3688 wait_for_rebuild
= mtip_hw_init(dd
);
3689 if (wait_for_rebuild
< 0) {
3690 dev_err(&dd
->pdev
->dev
,
3691 "Protocol layer initialization failed\n");
3693 goto protocol_init_error
;
3696 dd
->disk
= alloc_disk(MTIP_MAX_MINORS
);
3697 if (dd
->disk
== NULL
) {
3698 dev_err(&dd
->pdev
->dev
,
3699 "Unable to allocate gendisk structure\n");
3701 goto alloc_disk_error
;
3704 /* Generate the disk name, implemented same as in sd.c */
3706 if (!ida_pre_get(&rssd_index_ida
, GFP_KERNEL
))
3709 spin_lock(&rssd_index_lock
);
3710 rv
= ida_get_new(&rssd_index_ida
, &index
);
3711 spin_unlock(&rssd_index_lock
);
3712 } while (rv
== -EAGAIN
);
3717 rv
= rssd_disk_name_format("rssd",
3719 dd
->disk
->disk_name
,
3722 goto disk_index_error
;
3724 dd
->disk
->driverfs_dev
= &dd
->pdev
->dev
;
3725 dd
->disk
->major
= dd
->major
;
3726 dd
->disk
->first_minor
= dd
->instance
* MTIP_MAX_MINORS
;
3727 dd
->disk
->fops
= &mtip_block_ops
;
3728 dd
->disk
->private_data
= dd
;
3732 * if rebuild pending, start the service thread, and delay the block
3733 * queue creation and add_disk()
3735 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
3736 goto start_service_thread
;
3739 /* Allocate the request queue. */
3740 dd
->queue
= blk_alloc_queue(GFP_KERNEL
);
3741 if (dd
->queue
== NULL
) {
3742 dev_err(&dd
->pdev
->dev
,
3743 "Unable to allocate request queue\n");
3745 goto block_queue_alloc_init_error
;
3748 /* Attach our request function to the request queue. */
3749 blk_queue_make_request(dd
->queue
, mtip_make_request
);
3751 dd
->disk
->queue
= dd
->queue
;
3752 dd
->queue
->queuedata
= dd
;
3754 /* Set device limits. */
3755 set_bit(QUEUE_FLAG_NONROT
, &dd
->queue
->queue_flags
);
3756 blk_queue_max_segments(dd
->queue
, MTIP_MAX_SG
);
3757 blk_queue_physical_block_size(dd
->queue
, 4096);
3758 blk_queue_max_hw_sectors(dd
->queue
, 0xffff);
3759 blk_queue_max_segment_size(dd
->queue
, 0x400000);
3760 blk_queue_io_min(dd
->queue
, 4096);
3763 * write back cache is not supported in the device. FUA depends on
3764 * write back cache support, hence setting flush support to zero.
3766 blk_queue_flush(dd
->queue
, 0);
3768 /* Set the capacity of the device in 512 byte sectors. */
3769 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3770 dev_warn(&dd
->pdev
->dev
,
3771 "Could not read drive capacity\n");
3773 goto read_capacity_error
;
3775 set_capacity(dd
->disk
, capacity
);
3777 /* Enable the block device and add it to /dev */
3781 * Now that the disk is active, initialize any sysfs attributes
3782 * managed by the protocol layer.
3784 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3786 mtip_hw_sysfs_init(dd
, kobj
);
3789 mtip_hw_debugfs_init(dd
);
3791 if (dd
->mtip_svc_handler
) {
3792 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
3793 return rv
; /* service thread created for handling rebuild */
3796 start_service_thread
:
3797 sprintf(thd_name
, "mtip_svc_thd_%02d", index
);
3799 dd
->mtip_svc_handler
= kthread_run(mtip_service_thread
,
3802 if (IS_ERR(dd
->mtip_svc_handler
)) {
3803 dev_err(&dd
->pdev
->dev
, "service thread failed to start\n");
3804 dd
->mtip_svc_handler
= NULL
;
3806 goto kthread_run_error
;
3809 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
3810 rv
= wait_for_rebuild
;
3815 mtip_hw_debugfs_exit(dd
);
3817 /* Delete our gendisk. This also removes the device from /dev */
3818 del_gendisk(dd
->disk
);
3820 read_capacity_error
:
3821 blk_cleanup_queue(dd
->queue
);
3823 block_queue_alloc_init_error
:
3825 spin_lock(&rssd_index_lock
);
3826 ida_remove(&rssd_index_ida
, index
);
3827 spin_unlock(&rssd_index_lock
);
3833 mtip_hw_exit(dd
); /* De-initialize the protocol layer. */
3835 protocol_init_error
:
3840 * Block layer deinitialization function.
3842 * Called by the PCI layer as each P320 device is removed.
3844 * @dd Pointer to the driver data structure.
3849 static int mtip_block_remove(struct driver_data
*dd
)
3851 struct kobject
*kobj
;
3853 if (dd
->mtip_svc_handler
) {
3854 set_bit(MTIP_PF_SVC_THD_STOP_BIT
, &dd
->port
->flags
);
3855 wake_up_interruptible(&dd
->port
->svc_wait
);
3856 kthread_stop(dd
->mtip_svc_handler
);
3859 /* Clean up the sysfs attributes, if created */
3860 if (test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
)) {
3861 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3863 mtip_hw_sysfs_exit(dd
, kobj
);
3867 mtip_hw_debugfs_exit(dd
);
3870 * Delete our gendisk structure. This also removes the device
3873 del_gendisk(dd
->disk
);
3875 spin_lock(&rssd_index_lock
);
3876 ida_remove(&rssd_index_ida
, dd
->index
);
3877 spin_unlock(&rssd_index_lock
);
3879 blk_cleanup_queue(dd
->queue
);
3883 /* De-initialize the protocol layer. */
3890 * Function called by the PCI layer when just before the
3891 * machine shuts down.
3893 * If a protocol layer shutdown function is present it will be called
3896 * @dd Pointer to the driver data structure.
3901 static int mtip_block_shutdown(struct driver_data
*dd
)
3903 dev_info(&dd
->pdev
->dev
,
3904 "Shutting down %s ...\n", dd
->disk
->disk_name
);
3906 /* Delete our gendisk structure, and cleanup the blk queue. */
3907 del_gendisk(dd
->disk
);
3909 spin_lock(&rssd_index_lock
);
3910 ida_remove(&rssd_index_ida
, dd
->index
);
3911 spin_unlock(&rssd_index_lock
);
3913 blk_cleanup_queue(dd
->queue
);
3917 mtip_hw_shutdown(dd
);
3921 static int mtip_block_suspend(struct driver_data
*dd
)
3923 dev_info(&dd
->pdev
->dev
,
3924 "Suspending %s ...\n", dd
->disk
->disk_name
);
3925 mtip_hw_suspend(dd
);
3929 static int mtip_block_resume(struct driver_data
*dd
)
3931 dev_info(&dd
->pdev
->dev
, "Resuming %s ...\n",
3932 dd
->disk
->disk_name
);
3938 * Called for each supported PCI device detected.
3940 * This function allocates the private data structure, enables the
3941 * PCI device and then calls the block layer initialization function.
3944 * 0 on success else an error code.
3946 static int mtip_pci_probe(struct pci_dev
*pdev
,
3947 const struct pci_device_id
*ent
)
3950 struct driver_data
*dd
= NULL
;
3952 /* Allocate memory for this devices private data. */
3953 dd
= kzalloc(sizeof(struct driver_data
), GFP_KERNEL
);
3956 "Unable to allocate memory for driver data\n");
3960 /* Attach the private data to this PCI device. */
3961 pci_set_drvdata(pdev
, dd
);
3963 rv
= pcim_enable_device(pdev
);
3965 dev_err(&pdev
->dev
, "Unable to enable device\n");
3969 /* Map BAR5 to memory. */
3970 rv
= pcim_iomap_regions(pdev
, 1 << MTIP_ABAR
, MTIP_DRV_NAME
);
3972 dev_err(&pdev
->dev
, "Unable to map regions\n");
3976 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(64))) {
3977 rv
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
3980 rv
= pci_set_consistent_dma_mask(pdev
,
3983 dev_warn(&pdev
->dev
,
3984 "64-bit DMA enable failed\n");
3990 pci_set_master(pdev
);
3992 if (pci_enable_msi(pdev
)) {
3993 dev_warn(&pdev
->dev
,
3994 "Unable to enable MSI interrupt.\n");
3995 goto block_initialize_err
;
3998 /* Copy the info we may need later into the private data structure. */
3999 dd
->major
= mtip_major
;
4000 dd
->instance
= instance
;
4003 /* Initialize the block layer. */
4004 rv
= mtip_block_initialize(dd
);
4007 "Unable to initialize block layer\n");
4008 goto block_initialize_err
;
4012 * Increment the instance count so that each device has a unique
4016 if (rv
!= MTIP_FTL_REBUILD_MAGIC
)
4017 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
4020 block_initialize_err
:
4021 pci_disable_msi(pdev
);
4024 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4028 pci_set_drvdata(pdev
, NULL
);
4035 * Called for each probed device when the device is removed or the
4036 * driver is unloaded.
4041 static void mtip_pci_remove(struct pci_dev
*pdev
)
4043 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4046 set_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
);
4048 if (mtip_check_surprise_removal(pdev
)) {
4049 while (!test_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
)) {
4052 if (counter
== 10) {
4053 /* Cleanup the outstanding commands */
4054 mtip_command_cleanup(dd
);
4060 /* Clean up the block layer. */
4061 mtip_block_remove(dd
);
4063 pci_disable_msi(pdev
);
4066 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4070 * Called for each probed device when the device is suspended.
4076 static int mtip_pci_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
4079 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4083 "Driver private datastructure is NULL\n");
4087 set_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4089 /* Disable ports & interrupts then send standby immediate */
4090 rv
= mtip_block_suspend(dd
);
4093 "Failed to suspend controller\n");
4098 * Save the pci config space to pdev structure &
4099 * disable the device
4101 pci_save_state(pdev
);
4102 pci_disable_device(pdev
);
4104 /* Move to Low power state*/
4105 pci_set_power_state(pdev
, PCI_D3hot
);
4111 * Called for each probed device when the device is resumed.
4117 static int mtip_pci_resume(struct pci_dev
*pdev
)
4120 struct driver_data
*dd
;
4122 dd
= pci_get_drvdata(pdev
);
4125 "Driver private datastructure is NULL\n");
4129 /* Move the device to active State */
4130 pci_set_power_state(pdev
, PCI_D0
);
4132 /* Restore PCI configuration space */
4133 pci_restore_state(pdev
);
4135 /* Enable the PCI device*/
4136 rv
= pcim_enable_device(pdev
);
4139 "Failed to enable card during resume\n");
4142 pci_set_master(pdev
);
4145 * Calls hbaReset, initPort, & startPort function
4146 * then enables interrupts
4148 rv
= mtip_block_resume(dd
);
4150 dev_err(&pdev
->dev
, "Unable to resume\n");
4153 clear_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4164 static void mtip_pci_shutdown(struct pci_dev
*pdev
)
4166 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4168 mtip_block_shutdown(dd
);
4171 /* Table of device ids supported by this driver. */
4172 static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl
) = {
4173 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320H_DEVICE_ID
) },
4174 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320M_DEVICE_ID
) },
4175 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320S_DEVICE_ID
) },
4176 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P325M_DEVICE_ID
) },
4177 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P420H_DEVICE_ID
) },
4178 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P420M_DEVICE_ID
) },
4179 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P425M_DEVICE_ID
) },
4183 /* Structure that describes the PCI driver functions. */
4184 static struct pci_driver mtip_pci_driver
= {
4185 .name
= MTIP_DRV_NAME
,
4186 .id_table
= mtip_pci_tbl
,
4187 .probe
= mtip_pci_probe
,
4188 .remove
= mtip_pci_remove
,
4189 .suspend
= mtip_pci_suspend
,
4190 .resume
= mtip_pci_resume
,
4191 .shutdown
= mtip_pci_shutdown
,
4194 MODULE_DEVICE_TABLE(pci
, mtip_pci_tbl
);
4197 * Module initialization function.
4199 * Called once when the module is loaded. This function allocates a major
4200 * block device number to the Cyclone devices and registers the PCI layer
4204 * 0 on success else error code.
4206 static int __init
mtip_init(void)
4210 pr_info(MTIP_DRV_NAME
" Version " MTIP_DRV_VERSION
"\n");
4212 /* Allocate a major block device number to use with this driver. */
4213 error
= register_blkdev(0, MTIP_DRV_NAME
);
4215 pr_err("Unable to register block device (%d)\n",
4222 dfs_parent
= debugfs_create_dir("rssd", NULL
);
4223 if (IS_ERR_OR_NULL(dfs_parent
)) {
4224 pr_warn("Error creating debugfs parent\n");
4229 /* Register our PCI operations. */
4230 error
= pci_register_driver(&mtip_pci_driver
);
4232 debugfs_remove(dfs_parent
);
4233 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4240 * Module de-initialization function.
4242 * Called once when the module is unloaded. This function deallocates
4243 * the major block device number allocated by mtip_init() and
4244 * unregisters the PCI layer of the driver.
4249 static void __exit
mtip_exit(void)
4251 debugfs_remove_recursive(dfs_parent
);
4253 /* Release the allocated major block device number. */
4254 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4256 /* Unregister the PCI driver. */
4257 pci_unregister_driver(&mtip_pci_driver
);
4260 MODULE_AUTHOR("Micron Technology, Inc");
4261 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
4262 MODULE_LICENSE("GPL");
4263 MODULE_VERSION(MTIP_DRV_VERSION
);
4265 module_init(mtip_init
);
4266 module_exit(mtip_exit
);