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. */
84 struct list_head online_list
;
85 struct list_head removing_list
;
89 * Global variable used to hold the major block device number
90 * allocated in mtip_init().
92 static int mtip_major
;
93 static struct dentry
*dfs_parent
;
94 static struct dentry
*dfs_device_status
;
96 static u32 cpu_use
[NR_CPUS
];
98 static DEFINE_SPINLOCK(rssd_index_lock
);
99 static DEFINE_IDA(rssd_index_ida
);
101 static int mtip_block_initialize(struct driver_data
*dd
);
104 struct mtip_compat_ide_task_request_s
{
107 ide_reg_valid_t out_flags
;
108 ide_reg_valid_t in_flags
;
111 compat_ulong_t out_size
;
112 compat_ulong_t in_size
;
117 * This function check_for_surprise_removal is called
118 * while card is removed from the system and it will
119 * read the vendor id from the configration space
121 * @pdev Pointer to the pci_dev structure.
124 * true if device removed, else false
126 static bool mtip_check_surprise_removal(struct pci_dev
*pdev
)
129 struct driver_data
*dd
= pci_get_drvdata(pdev
);
134 /* Read the vendorID from the configuration space */
135 pci_read_config_word(pdev
, 0x00, &vendor_id
);
136 if (vendor_id
== 0xFFFF) {
139 set_bit(QUEUE_FLAG_DEAD
, &dd
->queue
->queue_flags
);
141 dev_warn(&dd
->pdev
->dev
,
142 "%s: dd->queue is NULL\n", __func__
);
144 set_bit(MTIP_PF_SR_CLEANUP_BIT
, &dd
->port
->flags
);
145 wake_up_interruptible(&dd
->port
->svc_wait
);
147 dev_warn(&dd
->pdev
->dev
,
148 "%s: dd->port is NULL\n", __func__
);
149 return true; /* device removed */
152 return false; /* device present */
156 * Obtain an empty command slot.
158 * This function needs to be reentrant since it could be called
159 * at the same time on multiple CPUs. The allocation of the
160 * command slot must be atomic.
162 * @port Pointer to the port data structure.
165 * >= 0 Index of command slot obtained.
166 * -1 No command slots available.
168 static int get_slot(struct mtip_port
*port
)
171 unsigned int num_command_slots
= port
->dd
->slot_groups
* 32;
174 * Try 10 times, because there is a small race here.
175 * that's ok, because it's still cheaper than a lock.
177 * Race: Since this section is not protected by lock, same bit
178 * could be chosen by different process contexts running in
179 * different processor. So instead of costly lock, we are going
182 for (i
= 0; i
< 10; i
++) {
183 slot
= find_next_zero_bit(port
->allocated
,
184 num_command_slots
, 1);
185 if ((slot
< num_command_slots
) &&
186 (!test_and_set_bit(slot
, port
->allocated
)))
189 dev_warn(&port
->dd
->pdev
->dev
, "Failed to get a tag.\n");
191 mtip_check_surprise_removal(port
->dd
->pdev
);
196 * Release a command slot.
198 * @port Pointer to the port data structure.
199 * @tag Tag of command to release
204 static inline void release_slot(struct mtip_port
*port
, int tag
)
206 smp_mb__before_clear_bit();
207 clear_bit(tag
, port
->allocated
);
208 smp_mb__after_clear_bit();
212 * IO completion function.
214 * This completion function is called by the driver ISR when a
215 * command that was issued by the kernel completes. It first calls the
216 * asynchronous completion function which normally calls back into the block
217 * layer passing the asynchronous callback data, then unmaps the
218 * scatter list associated with the completed command, and finally
219 * clears the allocated bit associated with the completed command.
221 * @port Pointer to the port data structure.
222 * @tag Tag of the command.
223 * @data Pointer to driver_data.
224 * @status Completion status.
229 static void mtip_async_complete(struct mtip_port
*port
,
234 struct mtip_cmd
*command
;
235 struct driver_data
*dd
= data
;
236 int cb_status
= status
? -EIO
: 0;
238 if (unlikely(!dd
) || unlikely(!port
))
241 command
= &port
->commands
[tag
];
243 if (unlikely(status
== PORT_IRQ_TF_ERR
)) {
244 dev_warn(&port
->dd
->pdev
->dev
,
245 "Command tag %d failed due to TFE\n", tag
);
248 /* Upper layer callback */
249 if (likely(command
->async_callback
))
250 command
->async_callback(command
->async_data
, cb_status
);
252 command
->async_callback
= NULL
;
253 command
->comp_func
= NULL
;
255 /* Unmap the DMA scatter list entries */
256 dma_unmap_sg(&dd
->pdev
->dev
,
258 command
->scatter_ents
,
261 /* Clear the allocated and active bits for the command */
262 atomic_set(&port
->commands
[tag
].active
, 0);
263 release_slot(port
, tag
);
269 * This function is called for clean the pending command in the
270 * command slot during the surprise removal of device and return
271 * error to the upper layer.
273 * @dd Pointer to the DRIVER_DATA structure.
278 static void mtip_command_cleanup(struct driver_data
*dd
)
281 struct mtip_cmd
*cmd
;
282 struct mtip_port
*port
= dd
->port
;
283 unsigned int num_cmd_slots
= dd
->slot_groups
* 32;
285 if (!test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
))
291 cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
292 if (atomic_read(&cmd
->active
))
293 if (readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
]) &
294 (1 << MTIP_TAG_INTERNAL
))
296 cmd
->comp_func(port
, MTIP_TAG_INTERNAL
,
297 cmd
->comp_data
, -ENODEV
);
300 tag
= find_next_bit(port
->allocated
, num_cmd_slots
, tag
);
301 if (tag
>= num_cmd_slots
)
304 cmd
= &port
->commands
[tag
];
305 if (atomic_read(&cmd
->active
))
306 mtip_async_complete(port
, tag
, dd
, -ENODEV
);
309 set_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
);
313 * Reset the HBA (without sleeping)
315 * @dd Pointer to the driver data structure.
318 * 0 The reset was successful.
319 * -1 The HBA Reset bit did not clear.
321 static int mtip_hba_reset(struct driver_data
*dd
)
323 unsigned long timeout
;
325 /* Set the reset bit */
326 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
329 readl(dd
->mmio
+ HOST_CTL
);
331 /* Spin for up to 2 seconds, waiting for reset acknowledgement */
332 timeout
= jiffies
+ msecs_to_jiffies(2000);
335 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))
338 } while ((readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
339 && time_before(jiffies
, timeout
));
341 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
348 * Issue a command to the hardware.
350 * Set the appropriate bit in the s_active and Command Issue hardware
351 * registers, causing hardware command processing to begin.
353 * @port Pointer to the port structure.
354 * @tag The tag of the command to be issued.
359 static inline void mtip_issue_ncq_command(struct mtip_port
*port
, int tag
)
361 int group
= tag
>> 5;
363 atomic_set(&port
->commands
[tag
].active
, 1);
365 /* guard SACT and CI registers */
366 spin_lock(&port
->cmd_issue_lock
[group
]);
367 writel((1 << MTIP_TAG_BIT(tag
)),
368 port
->s_active
[MTIP_TAG_INDEX(tag
)]);
369 writel((1 << MTIP_TAG_BIT(tag
)),
370 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
371 spin_unlock(&port
->cmd_issue_lock
[group
]);
373 /* Set the command's timeout value.*/
374 port
->commands
[tag
].comp_time
= jiffies
+ msecs_to_jiffies(
375 MTIP_NCQ_COMMAND_TIMEOUT_MS
);
379 * Enable/disable the reception of FIS
381 * @port Pointer to the port data structure
382 * @enable 1 to enable, 0 to disable
385 * Previous state: 1 enabled, 0 disabled
387 static int mtip_enable_fis(struct mtip_port
*port
, int enable
)
391 /* enable FIS reception */
392 tmp
= readl(port
->mmio
+ PORT_CMD
);
394 writel(tmp
| PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
396 writel(tmp
& ~PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
399 readl(port
->mmio
+ PORT_CMD
);
401 return (((tmp
& PORT_CMD_FIS_RX
) == PORT_CMD_FIS_RX
));
405 * Enable/disable the DMA engine
407 * @port Pointer to the port data structure
408 * @enable 1 to enable, 0 to disable
411 * Previous state: 1 enabled, 0 disabled.
413 static int mtip_enable_engine(struct mtip_port
*port
, int enable
)
417 /* enable FIS reception */
418 tmp
= readl(port
->mmio
+ PORT_CMD
);
420 writel(tmp
| PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
422 writel(tmp
& ~PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
424 readl(port
->mmio
+ PORT_CMD
);
425 return (((tmp
& PORT_CMD_START
) == PORT_CMD_START
));
429 * Enables the port DMA engine and FIS reception.
434 static inline void mtip_start_port(struct mtip_port
*port
)
436 /* Enable FIS reception */
437 mtip_enable_fis(port
, 1);
439 /* Enable the DMA engine */
440 mtip_enable_engine(port
, 1);
444 * Deinitialize a port by disabling port interrupts, the DMA engine,
447 * @port Pointer to the port structure
452 static inline void mtip_deinit_port(struct mtip_port
*port
)
454 /* Disable interrupts on this port */
455 writel(0, port
->mmio
+ PORT_IRQ_MASK
);
457 /* Disable the DMA engine */
458 mtip_enable_engine(port
, 0);
460 /* Disable FIS reception */
461 mtip_enable_fis(port
, 0);
467 * This function deinitializes the port by calling mtip_deinit_port() and
468 * then initializes it by setting the command header and RX FIS addresses,
469 * clearing the SError register and any pending port interrupts before
470 * re-enabling the default set of port interrupts.
472 * @port Pointer to the port structure.
477 static void mtip_init_port(struct mtip_port
*port
)
480 mtip_deinit_port(port
);
482 /* Program the command list base and FIS base addresses */
483 if (readl(port
->dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
) {
484 writel((port
->command_list_dma
>> 16) >> 16,
485 port
->mmio
+ PORT_LST_ADDR_HI
);
486 writel((port
->rxfis_dma
>> 16) >> 16,
487 port
->mmio
+ PORT_FIS_ADDR_HI
);
490 writel(port
->command_list_dma
& 0xFFFFFFFF,
491 port
->mmio
+ PORT_LST_ADDR
);
492 writel(port
->rxfis_dma
& 0xFFFFFFFF, port
->mmio
+ PORT_FIS_ADDR
);
495 writel(readl(port
->mmio
+ PORT_SCR_ERR
), port
->mmio
+ PORT_SCR_ERR
);
497 /* reset the completed registers.*/
498 for (i
= 0; i
< port
->dd
->slot_groups
; i
++)
499 writel(0xFFFFFFFF, port
->completed
[i
]);
501 /* Clear any pending interrupts for this port */
502 writel(readl(port
->mmio
+ PORT_IRQ_STAT
), port
->mmio
+ PORT_IRQ_STAT
);
504 /* Clear any pending interrupts on the HBA. */
505 writel(readl(port
->dd
->mmio
+ HOST_IRQ_STAT
),
506 port
->dd
->mmio
+ HOST_IRQ_STAT
);
508 /* Enable port interrupts */
509 writel(DEF_PORT_IRQ
, port
->mmio
+ PORT_IRQ_MASK
);
515 * @port Pointer to the port data structure.
520 static void mtip_restart_port(struct mtip_port
*port
)
522 unsigned long timeout
;
524 /* Disable the DMA engine */
525 mtip_enable_engine(port
, 0);
527 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
528 timeout
= jiffies
+ msecs_to_jiffies(500);
529 while ((readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
)
530 && time_before(jiffies
, timeout
))
533 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
537 * Chip quirk: escalate to hba reset if
538 * PxCMD.CR not clear after 500 ms
540 if (readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
) {
541 dev_warn(&port
->dd
->pdev
->dev
,
542 "PxCMD.CR not clear, escalating reset\n");
544 if (mtip_hba_reset(port
->dd
))
545 dev_err(&port
->dd
->pdev
->dev
,
546 "HBA reset escalation failed.\n");
548 /* 30 ms delay before com reset to quiesce chip */
552 dev_warn(&port
->dd
->pdev
->dev
, "Issuing COM reset\n");
555 writel(readl(port
->mmio
+ PORT_SCR_CTL
) |
556 1, port
->mmio
+ PORT_SCR_CTL
);
557 readl(port
->mmio
+ PORT_SCR_CTL
);
559 /* Wait 1 ms to quiesce chip function */
560 timeout
= jiffies
+ msecs_to_jiffies(1);
561 while (time_before(jiffies
, timeout
))
564 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
567 /* Clear PxSCTL.DET */
568 writel(readl(port
->mmio
+ PORT_SCR_CTL
) & ~1,
569 port
->mmio
+ PORT_SCR_CTL
);
570 readl(port
->mmio
+ PORT_SCR_CTL
);
572 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
573 timeout
= jiffies
+ msecs_to_jiffies(500);
574 while (((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
575 && time_before(jiffies
, timeout
))
578 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
581 if ((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
582 dev_warn(&port
->dd
->pdev
->dev
,
583 "COM reset failed\n");
585 mtip_init_port(port
);
586 mtip_start_port(port
);
590 static int mtip_device_reset(struct driver_data
*dd
)
594 if (mtip_check_surprise_removal(dd
->pdev
))
597 if (mtip_hba_reset(dd
) < 0)
601 mtip_init_port(dd
->port
);
602 mtip_start_port(dd
->port
);
604 /* Enable interrupts on the HBA. */
605 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
606 dd
->mmio
+ HOST_CTL
);
611 * Helper function for tag logging
613 static void print_tags(struct driver_data
*dd
,
615 unsigned long *tagbits
,
618 unsigned char tagmap
[128];
619 int group
, tagmap_len
= 0;
621 memset(tagmap
, 0, sizeof(tagmap
));
622 for (group
= SLOTBITS_IN_LONGS
; group
> 0; group
--)
623 tagmap_len
= sprintf(tagmap
+ tagmap_len
, "%016lX ",
625 dev_warn(&dd
->pdev
->dev
,
626 "%d command(s) %s: tagmap [%s]", cnt
, msg
, tagmap
);
630 * Called periodically to see if any read/write commands are
631 * taking too long to complete.
633 * @data Pointer to the PORT data structure.
638 static void mtip_timeout_function(unsigned long int data
)
640 struct mtip_port
*port
= (struct mtip_port
*) data
;
641 struct host_to_dev_fis
*fis
;
642 struct mtip_cmd
*command
;
643 int tag
, cmdto_cnt
= 0;
644 unsigned int bit
, group
;
645 unsigned int num_command_slots
;
646 unsigned long to
, tagaccum
[SLOTBITS_IN_LONGS
];
651 if (unlikely(port
->dd
->sr
))
654 if (test_bit(MTIP_DDF_RESUME_BIT
, &port
->dd
->dd_flag
)) {
655 mod_timer(&port
->cmd_timer
,
656 jiffies
+ msecs_to_jiffies(30000));
659 /* clear the tag accumulator */
660 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
661 num_command_slots
= port
->dd
->slot_groups
* 32;
663 for (tag
= 0; tag
< num_command_slots
; tag
++) {
665 * Skip internal command slot as it has
666 * its own timeout mechanism
668 if (tag
== MTIP_TAG_INTERNAL
)
671 if (atomic_read(&port
->commands
[tag
].active
) &&
672 (time_after(jiffies
, port
->commands
[tag
].comp_time
))) {
676 command
= &port
->commands
[tag
];
677 fis
= (struct host_to_dev_fis
*) command
->command
;
679 set_bit(tag
, tagaccum
);
682 set_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
685 * Clear the completed bit. This should prevent
686 * any interrupt handlers from trying to retire
689 writel(1 << bit
, port
->completed
[group
]);
691 /* Call the async completion callback. */
692 if (likely(command
->async_callback
))
693 command
->async_callback(command
->async_data
,
695 command
->async_callback
= NULL
;
696 command
->comp_func
= NULL
;
698 /* Unmap the DMA scatter list entries */
699 dma_unmap_sg(&port
->dd
->pdev
->dev
,
701 command
->scatter_ents
,
705 * Clear the allocated bit and active tag for the
708 atomic_set(&port
->commands
[tag
].active
, 0);
709 release_slot(port
, tag
);
716 print_tags(port
->dd
, "timed out", tagaccum
, cmdto_cnt
);
717 if (!test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
)) {
718 mtip_device_reset(port
->dd
);
719 wake_up_interruptible(&port
->svc_wait
);
721 clear_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
724 if (port
->ic_pause_timer
) {
725 to
= port
->ic_pause_timer
+ msecs_to_jiffies(1000);
726 if (time_after(jiffies
, to
)) {
727 if (!test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
)) {
728 port
->ic_pause_timer
= 0;
729 clear_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
730 clear_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
731 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
732 wake_up_interruptible(&port
->svc_wait
);
739 /* Restart the timer */
740 mod_timer(&port
->cmd_timer
,
741 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
745 * Internal command completion callback function.
747 * This function is normally called by the driver ISR when an internal
748 * command completed. This function signals the command completion by
749 * calling complete().
751 * @port Pointer to the port data structure.
752 * @tag Tag of the command that has completed.
753 * @data Pointer to a completion structure.
754 * @status Completion status.
759 static void mtip_completion(struct mtip_port
*port
,
764 struct mtip_cmd
*command
= &port
->commands
[tag
];
765 struct completion
*waiting
= data
;
766 if (unlikely(status
== PORT_IRQ_TF_ERR
))
767 dev_warn(&port
->dd
->pdev
->dev
,
768 "Internal command %d completed with TFE\n", tag
);
770 command
->async_callback
= NULL
;
771 command
->comp_func
= NULL
;
776 static void mtip_null_completion(struct mtip_port
*port
,
784 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
785 dma_addr_t buffer_dma
, unsigned int sectors
);
786 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
787 struct smart_attr
*attrib
);
791 * @dd Pointer to the DRIVER_DATA structure.
796 static void mtip_handle_tfe(struct driver_data
*dd
)
798 int group
, tag
, bit
, reissue
, rv
;
799 struct mtip_port
*port
;
800 struct mtip_cmd
*cmd
;
802 struct host_to_dev_fis
*fis
;
803 unsigned long tagaccum
[SLOTBITS_IN_LONGS
];
804 unsigned int cmd_cnt
= 0;
806 char *fail_reason
= NULL
;
807 int fail_all_ncq_write
= 0, fail_all_ncq_cmds
= 0;
809 dev_warn(&dd
->pdev
->dev
, "Taskfile error\n");
813 /* Stop the timer to prevent command timeouts. */
814 del_timer(&port
->cmd_timer
);
815 set_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
817 if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
) &&
818 test_bit(MTIP_TAG_INTERNAL
, port
->allocated
)) {
819 cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
820 dbg_printk(MTIP_DRV_NAME
" TFE for the internal command\n");
822 atomic_inc(&cmd
->active
); /* active > 1 indicates error */
823 if (cmd
->comp_data
&& cmd
->comp_func
) {
824 cmd
->comp_func(port
, MTIP_TAG_INTERNAL
,
825 cmd
->comp_data
, PORT_IRQ_TF_ERR
);
827 goto handle_tfe_exit
;
830 /* clear the tag accumulator */
831 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
833 /* Loop through all the groups */
834 for (group
= 0; group
< dd
->slot_groups
; group
++) {
835 completed
= readl(port
->completed
[group
]);
837 /* clear completed status register in the hardware.*/
838 writel(completed
, port
->completed
[group
]);
840 /* Process successfully completed commands */
841 for (bit
= 0; bit
< 32 && completed
; bit
++) {
842 if (!(completed
& (1<<bit
)))
844 tag
= (group
<< 5) + bit
;
846 /* Skip the internal command slot */
847 if (tag
== MTIP_TAG_INTERNAL
)
850 cmd
= &port
->commands
[tag
];
851 if (likely(cmd
->comp_func
)) {
852 set_bit(tag
, tagaccum
);
854 atomic_set(&cmd
->active
, 0);
860 dev_err(&port
->dd
->pdev
->dev
,
861 "Missing completion func for tag %d",
863 if (mtip_check_surprise_removal(dd
->pdev
)) {
864 /* don't proceed further */
871 print_tags(dd
, "completed (TFE)", tagaccum
, cmd_cnt
);
873 /* Restart the port */
875 mtip_restart_port(port
);
877 /* Trying to determine the cause of the error */
878 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
880 dd
->port
->log_buf_dma
, 1);
882 dev_warn(&dd
->pdev
->dev
,
883 "Error in READ LOG EXT (10h) command\n");
884 /* non-critical error, don't fail the load */
886 buf
= (unsigned char *)dd
->port
->log_buf
;
887 if (buf
[259] & 0x1) {
888 dev_info(&dd
->pdev
->dev
,
889 "Write protect bit is set.\n");
890 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
891 fail_all_ncq_write
= 1;
892 fail_reason
= "write protect";
894 if (buf
[288] == 0xF7) {
895 dev_info(&dd
->pdev
->dev
,
896 "Exceeded Tmax, drive in thermal shutdown.\n");
897 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
898 fail_all_ncq_cmds
= 1;
899 fail_reason
= "thermal shutdown";
901 if (buf
[288] == 0xBF) {
902 dev_info(&dd
->pdev
->dev
,
903 "Drive indicates rebuild has failed.\n");
904 fail_all_ncq_cmds
= 1;
905 fail_reason
= "rebuild failed";
909 /* clear the tag accumulator */
910 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
912 /* Loop through all the groups */
913 for (group
= 0; group
< dd
->slot_groups
; group
++) {
914 for (bit
= 0; bit
< 32; bit
++) {
916 tag
= (group
<< 5) + bit
;
917 cmd
= &port
->commands
[tag
];
919 /* If the active bit is set re-issue the command */
920 if (atomic_read(&cmd
->active
) == 0)
923 fis
= (struct host_to_dev_fis
*)cmd
->command
;
925 /* Should re-issue? */
926 if (tag
== MTIP_TAG_INTERNAL
||
927 fis
->command
== ATA_CMD_SET_FEATURES
)
930 if (fail_all_ncq_cmds
||
931 (fail_all_ncq_write
&&
932 fis
->command
== ATA_CMD_FPDMA_WRITE
)) {
933 dev_warn(&dd
->pdev
->dev
,
934 " Fail: %s w/tag %d [%s].\n",
935 fis
->command
== ATA_CMD_FPDMA_WRITE
?
938 fail_reason
!= NULL
?
939 fail_reason
: "unknown");
940 atomic_set(&cmd
->active
, 0);
941 if (cmd
->comp_func
) {
942 cmd
->comp_func(port
, tag
,
951 * First check if this command has
952 * exceeded its retries.
954 if (reissue
&& (cmd
->retries
-- > 0)) {
956 set_bit(tag
, tagaccum
);
958 /* Re-issue the command. */
959 mtip_issue_ncq_command(port
, tag
);
964 /* Retire a command that will not be reissued */
965 dev_warn(&port
->dd
->pdev
->dev
,
966 "retiring tag %d\n", tag
);
967 atomic_set(&cmd
->active
, 0);
976 dev_warn(&port
->dd
->pdev
->dev
,
977 "Bad completion for tag %d\n",
981 print_tags(dd
, "reissued (TFE)", tagaccum
, cmd_cnt
);
984 /* clear eh_active */
985 clear_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
986 wake_up_interruptible(&port
->svc_wait
);
988 mod_timer(&port
->cmd_timer
,
989 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
993 * Handle a set device bits interrupt
995 static inline void mtip_workq_sdbfx(struct mtip_port
*port
, int group
,
998 struct driver_data
*dd
= port
->dd
;
1000 struct mtip_cmd
*command
;
1003 WARN_ON_ONCE(!completed
);
1006 /* clear completed status register in the hardware.*/
1007 writel(completed
, port
->completed
[group
]);
1009 /* Process completed commands. */
1010 for (bit
= 0; (bit
< 32) && completed
; bit
++) {
1011 if (completed
& 0x01) {
1012 tag
= (group
<< 5) | bit
;
1014 /* skip internal command slot. */
1015 if (unlikely(tag
== MTIP_TAG_INTERNAL
))
1018 command
= &port
->commands
[tag
];
1019 /* make internal callback */
1020 if (likely(command
->comp_func
)) {
1027 dev_dbg(&dd
->pdev
->dev
,
1028 "Null completion for tag %d",
1031 if (mtip_check_surprise_removal(
1040 /* If last, re-enable interrupts */
1041 if (atomic_dec_return(&dd
->irq_workers_active
) == 0)
1042 writel(0xffffffff, dd
->mmio
+ HOST_IRQ_STAT
);
1046 * Process legacy pio and d2h interrupts
1048 static inline void mtip_process_legacy(struct driver_data
*dd
, u32 port_stat
)
1050 struct mtip_port
*port
= dd
->port
;
1051 struct mtip_cmd
*cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
1053 if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
) &&
1054 (cmd
!= NULL
) && !(readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1055 & (1 << MTIP_TAG_INTERNAL
))) {
1056 if (cmd
->comp_func
) {
1057 cmd
->comp_func(port
,
1069 * Demux and handle errors
1071 static inline void mtip_process_errors(struct driver_data
*dd
, u32 port_stat
)
1073 if (likely(port_stat
& (PORT_IRQ_TF_ERR
| PORT_IRQ_IF_ERR
)))
1074 mtip_handle_tfe(dd
);
1076 if (unlikely(port_stat
& PORT_IRQ_CONNECT
)) {
1077 dev_warn(&dd
->pdev
->dev
,
1078 "Clearing PxSERR.DIAG.x\n");
1079 writel((1 << 26), dd
->port
->mmio
+ PORT_SCR_ERR
);
1082 if (unlikely(port_stat
& PORT_IRQ_PHYRDY
)) {
1083 dev_warn(&dd
->pdev
->dev
,
1084 "Clearing PxSERR.DIAG.n\n");
1085 writel((1 << 16), dd
->port
->mmio
+ PORT_SCR_ERR
);
1088 if (unlikely(port_stat
& ~PORT_IRQ_HANDLED
)) {
1089 dev_warn(&dd
->pdev
->dev
,
1090 "Port stat errors %x unhandled\n",
1091 (port_stat
& ~PORT_IRQ_HANDLED
));
1095 static inline irqreturn_t
mtip_handle_irq(struct driver_data
*data
)
1097 struct driver_data
*dd
= (struct driver_data
*) data
;
1098 struct mtip_port
*port
= dd
->port
;
1099 u32 hba_stat
, port_stat
;
1101 int do_irq_enable
= 1, i
, workers
;
1102 struct mtip_work
*twork
;
1104 hba_stat
= readl(dd
->mmio
+ HOST_IRQ_STAT
);
1108 /* Acknowledge the interrupt status on the port.*/
1109 port_stat
= readl(port
->mmio
+ PORT_IRQ_STAT
);
1110 writel(port_stat
, port
->mmio
+ PORT_IRQ_STAT
);
1112 /* Demux port status */
1113 if (likely(port_stat
& PORT_IRQ_SDB_FIS
)) {
1115 WARN_ON_ONCE(atomic_read(&dd
->irq_workers_active
) != 0);
1117 /* Start at 1: group zero is always local? */
1118 for (i
= 0, workers
= 0; i
< MTIP_MAX_SLOT_GROUPS
;
1120 twork
= &dd
->work
[i
];
1121 twork
->completed
= readl(port
->completed
[i
]);
1122 if (twork
->completed
)
1126 atomic_set(&dd
->irq_workers_active
, workers
);
1128 for (i
= 1; i
< MTIP_MAX_SLOT_GROUPS
; i
++) {
1129 twork
= &dd
->work
[i
];
1130 if (twork
->completed
)
1137 if (likely(dd
->work
[0].completed
))
1138 mtip_workq_sdbfx(port
, 0,
1139 dd
->work
[0].completed
);
1143 * Chip quirk: SDB interrupt but nothing
1150 if (unlikely(port_stat
& PORT_IRQ_ERR
)) {
1151 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
1152 /* don't proceed further */
1155 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1159 mtip_process_errors(dd
, port_stat
& PORT_IRQ_ERR
);
1162 if (unlikely(port_stat
& PORT_IRQ_LEGACY
))
1163 mtip_process_legacy(dd
, port_stat
& PORT_IRQ_LEGACY
);
1166 /* acknowledge interrupt */
1167 if (unlikely(do_irq_enable
))
1168 writel(hba_stat
, dd
->mmio
+ HOST_IRQ_STAT
);
1174 * HBA interrupt subroutine.
1177 * @instance Pointer to the driver data structure.
1180 * IRQ_HANDLED A HBA interrupt was pending and handled.
1181 * IRQ_NONE This interrupt was not for the HBA.
1183 static irqreturn_t
mtip_irq_handler(int irq
, void *instance
)
1185 struct driver_data
*dd
= instance
;
1187 return mtip_handle_irq(dd
);
1190 static void mtip_issue_non_ncq_command(struct mtip_port
*port
, int tag
)
1192 atomic_set(&port
->commands
[tag
].active
, 1);
1193 writel(1 << MTIP_TAG_BIT(tag
),
1194 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
1197 static bool mtip_pause_ncq(struct mtip_port
*port
,
1198 struct host_to_dev_fis
*fis
)
1200 struct host_to_dev_fis
*reply
;
1201 unsigned long task_file_data
;
1203 reply
= port
->rxfis
+ RX_FIS_D2H_REG
;
1204 task_file_data
= readl(port
->mmio
+PORT_TFDATA
);
1206 if (fis
->command
== ATA_CMD_SEC_ERASE_UNIT
)
1207 clear_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1209 if ((task_file_data
& 1))
1212 if (fis
->command
== ATA_CMD_SEC_ERASE_PREP
) {
1213 set_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1214 set_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1215 port
->ic_pause_timer
= jiffies
;
1217 } else if ((fis
->command
== ATA_CMD_DOWNLOAD_MICRO
) &&
1218 (fis
->features
== 0x03)) {
1219 set_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1220 port
->ic_pause_timer
= jiffies
;
1222 } else if ((fis
->command
== ATA_CMD_SEC_ERASE_UNIT
) ||
1223 ((fis
->command
== 0xFC) &&
1224 (fis
->features
== 0x27 || fis
->features
== 0x72 ||
1225 fis
->features
== 0x62 || fis
->features
== 0x26))) {
1226 /* Com reset after secure erase or lowlevel format */
1227 mtip_restart_port(port
);
1235 * Wait for port to quiesce
1237 * @port Pointer to port data structure
1238 * @timeout Max duration to wait (ms)
1242 * -EBUSY Commands still active
1244 static int mtip_quiesce_io(struct mtip_port
*port
, unsigned long timeout
)
1248 unsigned int active
= 1;
1250 to
= jiffies
+ msecs_to_jiffies(timeout
);
1252 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
) &&
1253 test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
1255 continue; /* svc thd is actively issuing commands */
1257 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1260 * Ignore s_active bit 0 of array element 0.
1261 * This bit will always be set
1263 active
= readl(port
->s_active
[0]) & 0xFFFFFFFE;
1264 for (n
= 1; n
< port
->dd
->slot_groups
; n
++)
1265 active
|= readl(port
->s_active
[n
]);
1271 } while (time_before(jiffies
, to
));
1273 return active
? -EBUSY
: 0;
1277 * Execute an internal command and wait for the completion.
1279 * @port Pointer to the port data structure.
1280 * @fis Pointer to the FIS that describes the command.
1281 * @fis_len Length in WORDS of the FIS.
1282 * @buffer DMA accessible for command data.
1283 * @buf_len Length, in bytes, of the data buffer.
1284 * @opts Command header options, excluding the FIS length
1285 * and the number of PRD entries.
1286 * @timeout Time in ms to wait for the command to complete.
1289 * 0 Command completed successfully.
1290 * -EFAULT The buffer address is not correctly aligned.
1291 * -EBUSY Internal command or other IO in progress.
1292 * -EAGAIN Time out waiting for command to complete.
1294 static int mtip_exec_internal_command(struct mtip_port
*port
,
1295 struct host_to_dev_fis
*fis
,
1301 unsigned long timeout
)
1303 struct mtip_cmd_sg
*command_sg
;
1304 DECLARE_COMPLETION_ONSTACK(wait
);
1305 int rv
= 0, ready2go
= 1;
1306 struct mtip_cmd
*int_cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
1308 struct driver_data
*dd
= port
->dd
;
1310 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
1311 if (buffer
& 0x00000007) {
1312 dev_err(&dd
->pdev
->dev
, "SG buffer is not 8 byte aligned\n");
1316 to
= jiffies
+ msecs_to_jiffies(timeout
);
1318 ready2go
= !test_and_set_bit(MTIP_TAG_INTERNAL
,
1323 } while (time_before(jiffies
, to
));
1325 dev_warn(&dd
->pdev
->dev
,
1326 "Internal cmd active. new cmd [%02X]\n", fis
->command
);
1329 set_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1330 port
->ic_pause_timer
= 0;
1332 clear_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1333 clear_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1335 if (atomic
== GFP_KERNEL
) {
1336 if (fis
->command
!= ATA_CMD_STANDBYNOW1
) {
1337 /* wait for io to complete if non atomic */
1338 if (mtip_quiesce_io(port
, 5000) < 0) {
1339 dev_warn(&dd
->pdev
->dev
,
1340 "Failed to quiesce IO\n");
1341 release_slot(port
, MTIP_TAG_INTERNAL
);
1342 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1343 wake_up_interruptible(&port
->svc_wait
);
1348 /* Set the completion function and data for the command. */
1349 int_cmd
->comp_data
= &wait
;
1350 int_cmd
->comp_func
= mtip_completion
;
1353 /* Clear completion - we're going to poll */
1354 int_cmd
->comp_data
= NULL
;
1355 int_cmd
->comp_func
= mtip_null_completion
;
1358 /* Copy the command to the command table */
1359 memcpy(int_cmd
->command
, fis
, fis_len
*4);
1361 /* Populate the SG list */
1362 int_cmd
->command_header
->opts
=
1363 __force_bit2int
cpu_to_le32(opts
| fis_len
);
1365 command_sg
= int_cmd
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1368 __force_bit2int
cpu_to_le32((buf_len
-1) & 0x3FFFFF);
1370 __force_bit2int
cpu_to_le32(buffer
& 0xFFFFFFFF);
1371 command_sg
->dba_upper
=
1372 __force_bit2int
cpu_to_le32((buffer
>> 16) >> 16);
1374 int_cmd
->command_header
->opts
|=
1375 __force_bit2int
cpu_to_le32((1 << 16));
1378 /* Populate the command header */
1379 int_cmd
->command_header
->byte_count
= 0;
1381 /* Issue the command to the hardware */
1382 mtip_issue_non_ncq_command(port
, MTIP_TAG_INTERNAL
);
1384 if (atomic
== GFP_KERNEL
) {
1385 /* Wait for the command to complete or timeout. */
1386 if (wait_for_completion_interruptible_timeout(
1388 msecs_to_jiffies(timeout
)) <= 0) {
1389 if (rv
== -ERESTARTSYS
) { /* interrupted */
1390 dev_err(&dd
->pdev
->dev
,
1391 "Internal command [%02X] was interrupted after %lu ms\n",
1392 fis
->command
, timeout
);
1395 } else if (rv
== 0) /* timeout */
1396 dev_err(&dd
->pdev
->dev
,
1397 "Internal command did not complete [%02X] within timeout of %lu ms\n",
1398 fis
->command
, timeout
);
1400 dev_err(&dd
->pdev
->dev
,
1401 "Internal command [%02X] wait returned code [%d] after %lu ms - unhandled\n",
1402 fis
->command
, rv
, timeout
);
1404 if (mtip_check_surprise_removal(dd
->pdev
) ||
1405 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1407 dev_err(&dd
->pdev
->dev
,
1408 "Internal command [%02X] wait returned due to SR\n",
1413 mtip_device_reset(dd
); /* recover from timeout issue */
1418 u32 hba_stat
, port_stat
;
1420 /* Spin for <timeout> checking if command still outstanding */
1421 timeout
= jiffies
+ msecs_to_jiffies(timeout
);
1422 while ((readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1423 & (1 << MTIP_TAG_INTERNAL
))
1424 && time_before(jiffies
, timeout
)) {
1425 if (mtip_check_surprise_removal(dd
->pdev
)) {
1429 if ((fis
->command
!= ATA_CMD_STANDBYNOW1
) &&
1430 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1435 port_stat
= readl(port
->mmio
+ PORT_IRQ_STAT
);
1439 if (port_stat
& PORT_IRQ_ERR
) {
1440 dev_err(&dd
->pdev
->dev
,
1441 "Internal command [%02X] failed\n",
1443 mtip_device_reset(dd
);
1447 writel(port_stat
, port
->mmio
+ PORT_IRQ_STAT
);
1448 hba_stat
= readl(dd
->mmio
+ HOST_IRQ_STAT
);
1451 dd
->mmio
+ HOST_IRQ_STAT
);
1457 if (readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1458 & (1 << MTIP_TAG_INTERNAL
)) {
1460 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)) {
1461 mtip_device_reset(dd
);
1466 /* Clear the allocated and active bits for the internal command. */
1467 atomic_set(&int_cmd
->active
, 0);
1468 release_slot(port
, MTIP_TAG_INTERNAL
);
1469 if (rv
>= 0 && mtip_pause_ncq(port
, fis
)) {
1473 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1474 wake_up_interruptible(&port
->svc_wait
);
1480 * Byte-swap ATA ID strings.
1482 * ATA identify data contains strings in byte-swapped 16-bit words.
1483 * They must be swapped (on all architectures) to be usable as C strings.
1484 * This function swaps bytes in-place.
1486 * @buf The buffer location of the string
1487 * @len The number of bytes to swap
1492 static inline void ata_swap_string(u16
*buf
, unsigned int len
)
1495 for (i
= 0; i
< (len
/2); i
++)
1496 be16_to_cpus(&buf
[i
]);
1500 * Request the device identity information.
1502 * If a user space buffer is not specified, i.e. is NULL, the
1503 * identify information is still read from the drive and placed
1504 * into the identify data buffer (@e port->identify) in the
1505 * port data structure.
1506 * When the identify buffer contains valid identify information @e
1507 * port->identify_valid is non-zero.
1509 * @port Pointer to the port structure.
1510 * @user_buffer A user space buffer where the identify data should be
1514 * 0 Command completed successfully.
1515 * -EFAULT An error occurred while coping data to the user buffer.
1516 * -1 Command failed.
1518 static int mtip_get_identify(struct mtip_port
*port
, void __user
*user_buffer
)
1521 struct host_to_dev_fis fis
;
1523 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1526 /* Build the FIS. */
1527 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1530 fis
.command
= ATA_CMD_ID_ATA
;
1532 /* Set the identify information as invalid. */
1533 port
->identify_valid
= 0;
1535 /* Clear the identify information. */
1536 memset(port
->identify
, 0, sizeof(u16
) * ATA_ID_WORDS
);
1538 /* Execute the command. */
1539 if (mtip_exec_internal_command(port
,
1543 sizeof(u16
) * ATA_ID_WORDS
,
1546 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
)
1553 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1554 * perform field-sensitive swapping on the string fields.
1555 * See the kernel use of ata_id_string() for proof of this.
1557 #ifdef __LITTLE_ENDIAN
1558 ata_swap_string(port
->identify
+ 27, 40); /* model string*/
1559 ata_swap_string(port
->identify
+ 23, 8); /* firmware string*/
1560 ata_swap_string(port
->identify
+ 10, 20); /* serial# string*/
1564 for (i
= 0; i
< ATA_ID_WORDS
; i
++)
1565 port
->identify
[i
] = le16_to_cpu(port
->identify
[i
]);
1569 #ifdef MTIP_TRIM /* Disabling TRIM support temporarily */
1570 /* Demux ID.DRAT & ID.RZAT to determine trim support */
1571 if (port
->identify
[69] & (1 << 14) && port
->identify
[69] & (1 << 5))
1572 port
->dd
->trim_supp
= true;
1575 port
->dd
->trim_supp
= false;
1577 /* Set the identify buffer as valid. */
1578 port
->identify_valid
= 1;
1584 ATA_ID_WORDS
* sizeof(u16
))) {
1595 * Issue a standby immediate command to the device.
1597 * @port Pointer to the port structure.
1600 * 0 Command was executed successfully.
1601 * -1 An error occurred while executing the command.
1603 static int mtip_standby_immediate(struct mtip_port
*port
)
1606 struct host_to_dev_fis fis
;
1607 unsigned long start
;
1609 /* Build the FIS. */
1610 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1613 fis
.command
= ATA_CMD_STANDBYNOW1
;
1616 rv
= mtip_exec_internal_command(port
,
1624 dbg_printk(MTIP_DRV_NAME
"Time taken to complete standby cmd: %d ms\n",
1625 jiffies_to_msecs(jiffies
- start
));
1627 dev_warn(&port
->dd
->pdev
->dev
,
1628 "STANDBY IMMEDIATE command failed.\n");
1634 * Issue a READ LOG EXT command to the device.
1636 * @port pointer to the port structure.
1637 * @page page number to fetch
1638 * @buffer pointer to buffer
1639 * @buffer_dma dma address corresponding to @buffer
1640 * @sectors page length to fetch, in sectors
1643 * @rv return value from mtip_exec_internal_command()
1645 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
1646 dma_addr_t buffer_dma
, unsigned int sectors
)
1648 struct host_to_dev_fis fis
;
1650 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1653 fis
.command
= ATA_CMD_READ_LOG_EXT
;
1654 fis
.sect_count
= sectors
& 0xFF;
1655 fis
.sect_cnt_ex
= (sectors
>> 8) & 0xFF;
1658 fis
.device
= ATA_DEVICE_OBS
;
1660 memset(buffer
, 0, sectors
* ATA_SECT_SIZE
);
1662 return mtip_exec_internal_command(port
,
1666 sectors
* ATA_SECT_SIZE
,
1669 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
);
1673 * Issue a SMART READ DATA command to the device.
1675 * @port pointer to the port structure.
1676 * @buffer pointer to buffer
1677 * @buffer_dma dma address corresponding to @buffer
1680 * @rv return value from mtip_exec_internal_command()
1682 static int mtip_get_smart_data(struct mtip_port
*port
, u8
*buffer
,
1683 dma_addr_t buffer_dma
)
1685 struct host_to_dev_fis fis
;
1687 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1690 fis
.command
= ATA_CMD_SMART
;
1691 fis
.features
= 0xD0;
1695 fis
.device
= ATA_DEVICE_OBS
;
1697 return mtip_exec_internal_command(port
,
1708 * Get the value of a smart attribute
1710 * @port pointer to the port structure
1711 * @id attribute number
1712 * @attrib pointer to return attrib information corresponding to @id
1715 * -EINVAL NULL buffer passed or unsupported attribute @id.
1716 * -EPERM Identify data not valid, SMART not supported or not enabled
1718 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
1719 struct smart_attr
*attrib
)
1722 struct smart_attr
*pattr
;
1727 if (!port
->identify_valid
) {
1728 dev_warn(&port
->dd
->pdev
->dev
, "IDENTIFY DATA not valid\n");
1731 if (!(port
->identify
[82] & 0x1)) {
1732 dev_warn(&port
->dd
->pdev
->dev
, "SMART not supported\n");
1735 if (!(port
->identify
[85] & 0x1)) {
1736 dev_warn(&port
->dd
->pdev
->dev
, "SMART not enabled\n");
1740 memset(port
->smart_buf
, 0, ATA_SECT_SIZE
);
1741 rv
= mtip_get_smart_data(port
, port
->smart_buf
, port
->smart_buf_dma
);
1743 dev_warn(&port
->dd
->pdev
->dev
, "Failed to ge SMART data\n");
1747 pattr
= (struct smart_attr
*)(port
->smart_buf
+ 2);
1748 for (i
= 0; i
< 29; i
++, pattr
++)
1749 if (pattr
->attr_id
== id
) {
1750 memcpy(attrib
, pattr
, sizeof(struct smart_attr
));
1755 dev_warn(&port
->dd
->pdev
->dev
,
1756 "Query for invalid SMART attribute ID\n");
1764 * Trim unused sectors
1766 * @dd pointer to driver_data structure
1768 * @len # of 512b sectors to trim
1771 * -ENOMEM Out of dma memory
1772 * -EINVAL Invalid parameters passed in, trim not supported
1773 * -EIO Error submitting trim request to hw
1775 static int mtip_send_trim(struct driver_data
*dd
, unsigned int lba
,
1779 u64 tlba
, tlen
, sect_left
;
1780 struct mtip_trim_entry
*buf
;
1781 dma_addr_t dma_addr
;
1782 struct host_to_dev_fis fis
;
1784 if (!len
|| dd
->trim_supp
== false)
1787 /* Trim request too big */
1788 WARN_ON(len
> (MTIP_MAX_TRIM_ENTRY_LEN
* MTIP_MAX_TRIM_ENTRIES
));
1790 /* Trim request not aligned on 4k boundary */
1791 WARN_ON(len
% 8 != 0);
1793 /* Warn if vu_trim structure is too big */
1794 WARN_ON(sizeof(struct mtip_trim
) > ATA_SECT_SIZE
);
1796 /* Allocate a DMA buffer for the trim structure */
1797 buf
= dmam_alloc_coherent(&dd
->pdev
->dev
, ATA_SECT_SIZE
, &dma_addr
,
1801 memset(buf
, 0, ATA_SECT_SIZE
);
1803 for (i
= 0, sect_left
= len
, tlba
= lba
;
1804 i
< MTIP_MAX_TRIM_ENTRIES
&& sect_left
;
1806 tlen
= (sect_left
>= MTIP_MAX_TRIM_ENTRY_LEN
?
1807 MTIP_MAX_TRIM_ENTRY_LEN
:
1809 buf
[i
].lba
= __force_bit2int
cpu_to_le32(tlba
);
1810 buf
[i
].range
= __force_bit2int
cpu_to_le16(tlen
);
1814 WARN_ON(sect_left
!= 0);
1817 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1821 fis
.features
= 0x60;
1823 fis
.device
= ATA_DEVICE_OBS
;
1825 if (mtip_exec_internal_command(dd
->port
,
1832 MTIP_TRIM_TIMEOUT_MS
) < 0)
1835 dmam_free_coherent(&dd
->pdev
->dev
, ATA_SECT_SIZE
, buf
, dma_addr
);
1840 * Get the drive capacity.
1842 * @dd Pointer to the device data structure.
1843 * @sectors Pointer to the variable that will receive the sector count.
1846 * 1 Capacity was returned successfully.
1847 * 0 The identify information is invalid.
1849 static bool mtip_hw_get_capacity(struct driver_data
*dd
, sector_t
*sectors
)
1851 struct mtip_port
*port
= dd
->port
;
1852 u64 total
, raw0
, raw1
, raw2
, raw3
;
1853 raw0
= port
->identify
[100];
1854 raw1
= port
->identify
[101];
1855 raw2
= port
->identify
[102];
1856 raw3
= port
->identify
[103];
1857 total
= raw0
| raw1
<<16 | raw2
<<32 | raw3
<<48;
1859 return (bool) !!port
->identify_valid
;
1863 * Display the identify command data.
1865 * @port Pointer to the port data structure.
1870 static void mtip_dump_identify(struct mtip_port
*port
)
1873 unsigned short revid
;
1876 if (!port
->identify_valid
)
1879 strlcpy(cbuf
, (char *)(port
->identify
+10), 21);
1880 dev_info(&port
->dd
->pdev
->dev
,
1881 "Serial No.: %s\n", cbuf
);
1883 strlcpy(cbuf
, (char *)(port
->identify
+23), 9);
1884 dev_info(&port
->dd
->pdev
->dev
,
1885 "Firmware Ver.: %s\n", cbuf
);
1887 strlcpy(cbuf
, (char *)(port
->identify
+27), 41);
1888 dev_info(&port
->dd
->pdev
->dev
, "Model: %s\n", cbuf
);
1890 if (mtip_hw_get_capacity(port
->dd
, §ors
))
1891 dev_info(&port
->dd
->pdev
->dev
,
1892 "Capacity: %llu sectors (%llu MB)\n",
1894 ((u64
)sectors
) * ATA_SECT_SIZE
>> 20);
1896 pci_read_config_word(port
->dd
->pdev
, PCI_REVISION_ID
, &revid
);
1897 switch (revid
& 0xFF) {
1899 strlcpy(cbuf
, "A0", 3);
1902 strlcpy(cbuf
, "A2", 3);
1905 strlcpy(cbuf
, "?", 2);
1908 dev_info(&port
->dd
->pdev
->dev
,
1909 "Card Type: %s\n", cbuf
);
1913 * Map the commands scatter list into the command table.
1915 * @command Pointer to the command.
1916 * @nents Number of scatter list entries.
1921 static inline void fill_command_sg(struct driver_data
*dd
,
1922 struct mtip_cmd
*command
,
1926 unsigned int dma_len
;
1927 struct mtip_cmd_sg
*command_sg
;
1928 struct scatterlist
*sg
= command
->sg
;
1930 command_sg
= command
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1932 for (n
= 0; n
< nents
; n
++) {
1933 dma_len
= sg_dma_len(sg
);
1934 if (dma_len
> 0x400000)
1935 dev_err(&dd
->pdev
->dev
,
1936 "DMA segment length truncated\n");
1937 command_sg
->info
= __force_bit2int
1938 cpu_to_le32((dma_len
-1) & 0x3FFFFF);
1939 command_sg
->dba
= __force_bit2int
1940 cpu_to_le32(sg_dma_address(sg
));
1941 command_sg
->dba_upper
= __force_bit2int
1942 cpu_to_le32((sg_dma_address(sg
) >> 16) >> 16);
1949 * @brief Execute a drive command.
1951 * return value 0 The command completed successfully.
1952 * return value -1 An error occurred while executing the command.
1954 static int exec_drive_task(struct mtip_port
*port
, u8
*command
)
1956 struct host_to_dev_fis fis
;
1957 struct host_to_dev_fis
*reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1959 /* Build the FIS. */
1960 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1963 fis
.command
= command
[0];
1964 fis
.features
= command
[1];
1965 fis
.sect_count
= command
[2];
1966 fis
.sector
= command
[3];
1967 fis
.cyl_low
= command
[4];
1968 fis
.cyl_hi
= command
[5];
1969 fis
.device
= command
[6] & ~0x10; /* Clear the dev bit*/
1971 dbg_printk(MTIP_DRV_NAME
" %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
1981 /* Execute the command. */
1982 if (mtip_exec_internal_command(port
,
1989 MTIP_IOCTL_COMMAND_TIMEOUT_MS
) < 0) {
1993 command
[0] = reply
->command
; /* Status*/
1994 command
[1] = reply
->features
; /* Error*/
1995 command
[4] = reply
->cyl_low
;
1996 command
[5] = reply
->cyl_hi
;
1998 dbg_printk(MTIP_DRV_NAME
" %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
2009 * @brief Execute a drive command.
2011 * @param port Pointer to the port data structure.
2012 * @param command Pointer to the user specified command parameters.
2013 * @param user_buffer Pointer to the user space buffer where read sector
2014 * data should be copied.
2016 * return value 0 The command completed successfully.
2017 * return value -EFAULT An error occurred while copying the completion
2018 * data to the user space buffer.
2019 * return value -1 An error occurred while executing the command.
2021 static int exec_drive_command(struct mtip_port
*port
, u8
*command
,
2022 void __user
*user_buffer
)
2024 struct host_to_dev_fis fis
;
2025 struct host_to_dev_fis
*reply
;
2027 dma_addr_t dma_addr
= 0;
2028 int rv
= 0, xfer_sz
= command
[3];
2034 buf
= dmam_alloc_coherent(&port
->dd
->pdev
->dev
,
2035 ATA_SECT_SIZE
* xfer_sz
,
2039 dev_err(&port
->dd
->pdev
->dev
,
2040 "Memory allocation failed (%d bytes)\n",
2041 ATA_SECT_SIZE
* xfer_sz
);
2044 memset(buf
, 0, ATA_SECT_SIZE
* xfer_sz
);
2047 /* Build the FIS. */
2048 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
2051 fis
.command
= command
[0];
2052 fis
.features
= command
[2];
2053 fis
.sect_count
= command
[3];
2054 if (fis
.command
== ATA_CMD_SMART
) {
2055 fis
.sector
= command
[1];
2061 reply
= (port
->rxfis
+ RX_FIS_PIO_SETUP
);
2063 reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
2065 dbg_printk(MTIP_DRV_NAME
2066 " %s: User Command: cmd %x, sect %x, "
2067 "feat %x, sectcnt %x\n",
2074 /* Execute the command. */
2075 if (mtip_exec_internal_command(port
,
2078 (xfer_sz
? dma_addr
: 0),
2079 (xfer_sz
? ATA_SECT_SIZE
* xfer_sz
: 0),
2082 MTIP_IOCTL_COMMAND_TIMEOUT_MS
)
2085 goto exit_drive_command
;
2088 /* Collect the completion status. */
2089 command
[0] = reply
->command
; /* Status*/
2090 command
[1] = reply
->features
; /* Error*/
2091 command
[2] = reply
->sect_count
;
2093 dbg_printk(MTIP_DRV_NAME
2094 " %s: Completion Status: stat %x, "
2095 "err %x, nsect %x\n",
2102 if (copy_to_user(user_buffer
,
2104 ATA_SECT_SIZE
* command
[3])) {
2106 goto exit_drive_command
;
2111 dmam_free_coherent(&port
->dd
->pdev
->dev
,
2112 ATA_SECT_SIZE
* xfer_sz
, buf
, dma_addr
);
2117 * Indicates whether a command has a single sector payload.
2119 * @command passed to the device to perform the certain event.
2120 * @features passed to the device to perform the certain event.
2123 * 1 command is one that always has a single sector payload,
2124 * regardless of the value in the Sector Count field.
2128 static unsigned int implicit_sector(unsigned char command
,
2129 unsigned char features
)
2131 unsigned int rv
= 0;
2133 /* list of commands that have an implicit sector count of 1 */
2135 case ATA_CMD_SEC_SET_PASS
:
2136 case ATA_CMD_SEC_UNLOCK
:
2137 case ATA_CMD_SEC_ERASE_PREP
:
2138 case ATA_CMD_SEC_ERASE_UNIT
:
2139 case ATA_CMD_SEC_FREEZE_LOCK
:
2140 case ATA_CMD_SEC_DISABLE_PASS
:
2141 case ATA_CMD_PMP_READ
:
2142 case ATA_CMD_PMP_WRITE
:
2145 case ATA_CMD_SET_MAX
:
2146 if (features
== ATA_SET_MAX_UNLOCK
)
2150 if ((features
== ATA_SMART_READ_VALUES
) ||
2151 (features
== ATA_SMART_READ_THRESHOLDS
))
2154 case ATA_CMD_CONF_OVERLAY
:
2155 if ((features
== ATA_DCO_IDENTIFY
) ||
2156 (features
== ATA_DCO_SET
))
2162 static void mtip_set_timeout(struct driver_data
*dd
,
2163 struct host_to_dev_fis
*fis
,
2164 unsigned int *timeout
, u8 erasemode
)
2166 switch (fis
->command
) {
2167 case ATA_CMD_DOWNLOAD_MICRO
:
2168 *timeout
= 120000; /* 2 minutes */
2170 case ATA_CMD_SEC_ERASE_UNIT
:
2173 *timeout
= ((*(dd
->port
->identify
+ 90) * 2) * 60000);
2175 *timeout
= ((*(dd
->port
->identify
+ 89) * 2) * 60000);
2177 case ATA_CMD_STANDBYNOW1
:
2178 *timeout
= 120000; /* 2 minutes */
2182 *timeout
= 60000; /* 60 seconds */
2185 *timeout
= 15000; /* 15 seconds */
2188 *timeout
= MTIP_IOCTL_COMMAND_TIMEOUT_MS
;
2194 * Executes a taskfile
2195 * See ide_taskfile_ioctl() for derivation
2197 static int exec_drive_taskfile(struct driver_data
*dd
,
2199 ide_task_request_t
*req_task
,
2202 struct host_to_dev_fis fis
;
2203 struct host_to_dev_fis
*reply
;
2206 dma_addr_t outbuf_dma
= 0;
2207 dma_addr_t inbuf_dma
= 0;
2208 dma_addr_t dma_buffer
= 0;
2210 unsigned int taskin
= 0;
2211 unsigned int taskout
= 0;
2213 unsigned int timeout
;
2214 unsigned int force_single_sector
;
2215 unsigned int transfer_size
;
2216 unsigned long task_file_data
;
2217 int intotal
= outtotal
+ req_task
->out_size
;
2220 taskout
= req_task
->out_size
;
2221 taskin
= req_task
->in_size
;
2222 /* 130560 = 512 * 0xFF*/
2223 if (taskin
> 130560 || taskout
> 130560) {
2229 outbuf
= kzalloc(taskout
, GFP_KERNEL
);
2230 if (outbuf
== NULL
) {
2234 if (copy_from_user(outbuf
, buf
+ outtotal
, taskout
)) {
2238 outbuf_dma
= pci_map_single(dd
->pdev
,
2242 if (outbuf_dma
== 0) {
2246 dma_buffer
= outbuf_dma
;
2250 inbuf
= kzalloc(taskin
, GFP_KERNEL
);
2251 if (inbuf
== NULL
) {
2256 if (copy_from_user(inbuf
, buf
+ intotal
, taskin
)) {
2260 inbuf_dma
= pci_map_single(dd
->pdev
,
2262 taskin
, DMA_FROM_DEVICE
);
2263 if (inbuf_dma
== 0) {
2267 dma_buffer
= inbuf_dma
;
2270 /* only supports PIO and non-data commands from this ioctl. */
2271 switch (req_task
->data_phase
) {
2273 nsect
= taskout
/ ATA_SECT_SIZE
;
2274 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2277 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2279 case TASKFILE_NO_DATA
:
2280 reply
= (dd
->port
->rxfis
+ RX_FIS_D2H_REG
);
2287 /* Build the FIS. */
2288 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
2292 fis
.command
= req_task
->io_ports
[7];
2293 fis
.features
= req_task
->io_ports
[1];
2294 fis
.sect_count
= req_task
->io_ports
[2];
2295 fis
.lba_low
= req_task
->io_ports
[3];
2296 fis
.lba_mid
= req_task
->io_ports
[4];
2297 fis
.lba_hi
= req_task
->io_ports
[5];
2298 /* Clear the dev bit*/
2299 fis
.device
= req_task
->io_ports
[6] & ~0x10;
2301 if ((req_task
->in_flags
.all
== 0) && (req_task
->out_flags
.all
& 1)) {
2302 req_task
->in_flags
.all
=
2303 IDE_TASKFILE_STD_IN_FLAGS
|
2304 (IDE_HOB_STD_IN_FLAGS
<< 8);
2305 fis
.lba_low_ex
= req_task
->hob_ports
[3];
2306 fis
.lba_mid_ex
= req_task
->hob_ports
[4];
2307 fis
.lba_hi_ex
= req_task
->hob_ports
[5];
2308 fis
.features_ex
= req_task
->hob_ports
[1];
2309 fis
.sect_cnt_ex
= req_task
->hob_ports
[2];
2312 req_task
->in_flags
.all
= IDE_TASKFILE_STD_IN_FLAGS
;
2315 force_single_sector
= implicit_sector(fis
.command
, fis
.features
);
2317 if ((taskin
|| taskout
) && (!fis
.sect_count
)) {
2319 fis
.sect_count
= nsect
;
2321 if (!force_single_sector
) {
2322 dev_warn(&dd
->pdev
->dev
,
2323 "data movement but "
2324 "sect_count is 0\n");
2331 dbg_printk(MTIP_DRV_NAME
2332 " %s: cmd %x, feat %x, nsect %x,"
2333 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
2344 /* check for erase mode support during secure erase.*/
2345 if ((fis
.command
== ATA_CMD_SEC_ERASE_UNIT
) && outbuf
&&
2346 (outbuf
[0] & MTIP_SEC_ERASE_MODE
)) {
2350 mtip_set_timeout(dd
, &fis
, &timeout
, erasemode
);
2352 /* Determine the correct transfer size.*/
2353 if (force_single_sector
)
2354 transfer_size
= ATA_SECT_SIZE
;
2356 transfer_size
= ATA_SECT_SIZE
* fis
.sect_count
;
2358 /* Execute the command.*/
2359 if (mtip_exec_internal_command(dd
->port
,
2371 task_file_data
= readl(dd
->port
->mmio
+PORT_TFDATA
);
2373 if ((req_task
->data_phase
== TASKFILE_IN
) && !(task_file_data
& 1)) {
2374 reply
= dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
;
2375 req_task
->io_ports
[7] = reply
->control
;
2377 reply
= dd
->port
->rxfis
+ RX_FIS_D2H_REG
;
2378 req_task
->io_ports
[7] = reply
->command
;
2381 /* reclaim the DMA buffers.*/
2383 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2384 taskin
, DMA_FROM_DEVICE
);
2386 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2387 taskout
, DMA_TO_DEVICE
);
2391 /* return the ATA registers to the caller.*/
2392 req_task
->io_ports
[1] = reply
->features
;
2393 req_task
->io_ports
[2] = reply
->sect_count
;
2394 req_task
->io_ports
[3] = reply
->lba_low
;
2395 req_task
->io_ports
[4] = reply
->lba_mid
;
2396 req_task
->io_ports
[5] = reply
->lba_hi
;
2397 req_task
->io_ports
[6] = reply
->device
;
2399 if (req_task
->out_flags
.all
& 1) {
2401 req_task
->hob_ports
[3] = reply
->lba_low_ex
;
2402 req_task
->hob_ports
[4] = reply
->lba_mid_ex
;
2403 req_task
->hob_ports
[5] = reply
->lba_hi_ex
;
2404 req_task
->hob_ports
[1] = reply
->features_ex
;
2405 req_task
->hob_ports
[2] = reply
->sect_cnt_ex
;
2407 dbg_printk(MTIP_DRV_NAME
2408 " %s: Completion: stat %x,"
2409 "err %x, sect_cnt %x, lbalo %x,"
2410 "lbamid %x, lbahi %x, dev %x\n",
2412 req_task
->io_ports
[7],
2413 req_task
->io_ports
[1],
2414 req_task
->io_ports
[2],
2415 req_task
->io_ports
[3],
2416 req_task
->io_ports
[4],
2417 req_task
->io_ports
[5],
2418 req_task
->io_ports
[6]);
2421 if (copy_to_user(buf
+ outtotal
, outbuf
, taskout
)) {
2427 if (copy_to_user(buf
+ intotal
, inbuf
, taskin
)) {
2434 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2435 taskin
, DMA_FROM_DEVICE
);
2437 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2438 taskout
, DMA_TO_DEVICE
);
2446 * Handle IOCTL calls from the Block Layer.
2448 * This function is called by the Block Layer when it receives an IOCTL
2449 * command that it does not understand. If the IOCTL command is not supported
2450 * this function returns -ENOTTY.
2452 * @dd Pointer to the driver data structure.
2453 * @cmd IOCTL command passed from the Block Layer.
2454 * @arg IOCTL argument passed from the Block Layer.
2457 * 0 The IOCTL completed successfully.
2458 * -ENOTTY The specified command is not supported.
2459 * -EFAULT An error occurred copying data to a user space buffer.
2460 * -EIO An error occurred while executing the command.
2462 static int mtip_hw_ioctl(struct driver_data
*dd
, unsigned int cmd
,
2466 case HDIO_GET_IDENTITY
:
2468 if (copy_to_user((void __user
*)arg
, dd
->port
->identify
,
2469 sizeof(u16
) * ATA_ID_WORDS
))
2473 case HDIO_DRIVE_CMD
:
2475 u8 drive_command
[4];
2477 /* Copy the user command info to our buffer. */
2478 if (copy_from_user(drive_command
,
2479 (void __user
*) arg
,
2480 sizeof(drive_command
)))
2483 /* Execute the drive command. */
2484 if (exec_drive_command(dd
->port
,
2486 (void __user
*) (arg
+4)))
2489 /* Copy the status back to the users buffer. */
2490 if (copy_to_user((void __user
*) arg
,
2492 sizeof(drive_command
)))
2497 case HDIO_DRIVE_TASK
:
2499 u8 drive_command
[7];
2501 /* Copy the user command info to our buffer. */
2502 if (copy_from_user(drive_command
,
2503 (void __user
*) arg
,
2504 sizeof(drive_command
)))
2507 /* Execute the drive command. */
2508 if (exec_drive_task(dd
->port
, drive_command
))
2511 /* Copy the status back to the users buffer. */
2512 if (copy_to_user((void __user
*) arg
,
2514 sizeof(drive_command
)))
2519 case HDIO_DRIVE_TASKFILE
: {
2520 ide_task_request_t req_task
;
2523 if (copy_from_user(&req_task
, (void __user
*) arg
,
2527 outtotal
= sizeof(req_task
);
2529 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
2530 &req_task
, outtotal
);
2532 if (copy_to_user((void __user
*) arg
, &req_task
,
2546 * Submit an IO to the hw
2548 * This function is called by the block layer to issue an io
2549 * to the device. Upon completion, the callback function will
2550 * be called with the data parameter passed as the callback data.
2552 * @dd Pointer to the driver data structure.
2553 * @start First sector to read.
2554 * @nsect Number of sectors to read.
2555 * @nents Number of entries in scatter list for the read command.
2556 * @tag The tag of this read command.
2557 * @callback Pointer to the function that should be called
2558 * when the read completes.
2559 * @data Callback data passed to the callback function
2560 * when the read completes.
2561 * @dir Direction (read or write)
2566 static void mtip_hw_submit_io(struct driver_data
*dd
, sector_t sector
,
2567 int nsect
, int nents
, int tag
, void *callback
,
2568 void *data
, int dir
, int unaligned
)
2570 struct host_to_dev_fis
*fis
;
2571 struct mtip_port
*port
= dd
->port
;
2572 struct mtip_cmd
*command
= &port
->commands
[tag
];
2573 int dma_dir
= (dir
== READ
) ? DMA_FROM_DEVICE
: DMA_TO_DEVICE
;
2576 /* Map the scatter list for DMA access */
2577 nents
= dma_map_sg(&dd
->pdev
->dev
, command
->sg
, nents
, dma_dir
);
2579 command
->scatter_ents
= nents
;
2581 command
->unaligned
= unaligned
;
2583 * The number of retries for this command before it is
2584 * reported as a failure to the upper layers.
2586 command
->retries
= MTIP_MAX_RETRIES
;
2589 fis
= command
->command
;
2593 (dir
== READ
? ATA_CMD_FPDMA_READ
: ATA_CMD_FPDMA_WRITE
);
2594 fis
->lba_low
= start
& 0xFF;
2595 fis
->lba_mid
= (start
>> 8) & 0xFF;
2596 fis
->lba_hi
= (start
>> 16) & 0xFF;
2597 fis
->lba_low_ex
= (start
>> 24) & 0xFF;
2598 fis
->lba_mid_ex
= (start
>> 32) & 0xFF;
2599 fis
->lba_hi_ex
= (start
>> 40) & 0xFF;
2600 fis
->device
= 1 << 6;
2601 fis
->features
= nsect
& 0xFF;
2602 fis
->features_ex
= (nsect
>> 8) & 0xFF;
2603 fis
->sect_count
= ((tag
<< 3) | (tag
>> 5));
2604 fis
->sect_cnt_ex
= 0;
2608 fill_command_sg(dd
, command
, nents
);
2611 fis
->device
|= 1 << 7;
2613 /* Populate the command header */
2614 command
->command_header
->opts
=
2615 __force_bit2int
cpu_to_le32(
2616 (nents
<< 16) | 5 | AHCI_CMD_PREFETCH
);
2617 command
->command_header
->byte_count
= 0;
2620 * Set the completion function and data for the command
2621 * within this layer.
2623 command
->comp_data
= dd
;
2624 command
->comp_func
= mtip_async_complete
;
2625 command
->direction
= dma_dir
;
2628 * Set the completion function and data for the command passed
2629 * from the upper layer.
2631 command
->async_data
= data
;
2632 command
->async_callback
= callback
;
2635 * To prevent this command from being issued
2636 * if an internal command is in progress or error handling is active.
2638 if (port
->flags
& MTIP_PF_PAUSE_IO
) {
2639 set_bit(tag
, port
->cmds_to_issue
);
2640 set_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2644 /* Issue the command to the hardware */
2645 mtip_issue_ncq_command(port
, tag
);
2651 * Release a command slot.
2653 * @dd Pointer to the driver data structure.
2659 static void mtip_hw_release_scatterlist(struct driver_data
*dd
, int tag
,
2662 struct semaphore
*sem
= unaligned
? &dd
->port
->cmd_slot_unal
:
2663 &dd
->port
->cmd_slot
;
2664 release_slot(dd
->port
, tag
);
2669 * Obtain a command slot and return its associated scatter list.
2671 * @dd Pointer to the driver data structure.
2672 * @tag Pointer to an int that will receive the allocated command
2676 * Pointer to the scatter list for the allocated command slot
2677 * or NULL if no command slots are available.
2679 static struct scatterlist
*mtip_hw_get_scatterlist(struct driver_data
*dd
,
2680 int *tag
, int unaligned
)
2682 struct semaphore
*sem
= unaligned
? &dd
->port
->cmd_slot_unal
:
2683 &dd
->port
->cmd_slot
;
2686 * It is possible that, even with this semaphore, a thread
2687 * may think that no command slots are available. Therefore, we
2688 * need to make an attempt to get_slot().
2691 *tag
= get_slot(dd
->port
);
2693 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
2697 if (unlikely(*tag
< 0)) {
2702 return dd
->port
->commands
[*tag
].sg
;
2706 * Sysfs status dump.
2708 * @dev Pointer to the device structure, passed by the kernrel.
2709 * @attr Pointer to the device_attribute structure passed by the kernel.
2710 * @buf Pointer to the char buffer that will receive the stats info.
2713 * The size, in bytes, of the data copied into buf.
2715 static ssize_t
mtip_hw_show_status(struct device
*dev
,
2716 struct device_attribute
*attr
,
2719 struct driver_data
*dd
= dev_to_disk(dev
)->private_data
;
2722 if (test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))
2723 size
+= sprintf(buf
, "%s", "thermal_shutdown\n");
2724 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
))
2725 size
+= sprintf(buf
, "%s", "write_protect\n");
2727 size
+= sprintf(buf
, "%s", "online\n");
2732 static DEVICE_ATTR(status
, S_IRUGO
, mtip_hw_show_status
, NULL
);
2734 /* debugsfs entries */
2736 static ssize_t
show_device_status(struct device_driver
*drv
, char *buf
)
2739 struct driver_data
*dd
, *tmp
;
2740 unsigned long flags
;
2744 spin_lock_irqsave(&dev_lock
, flags
);
2745 size
+= sprintf(&buf
[size
], "Devices Present:\n");
2746 list_for_each_entry_safe(dd
, tmp
, &online_list
, online_list
) {
2749 dd
->port
->identify
&&
2750 dd
->port
->identify_valid
) {
2752 (char *) (dd
->port
->identify
+ 10), 21);
2753 status
= *(dd
->port
->identify
+ 141);
2755 memset(id_buf
, 0, 42);
2760 test_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
)) {
2761 size
+= sprintf(&buf
[size
],
2762 " device %s %s (ftl rebuild %d %%)\n",
2763 dev_name(&dd
->pdev
->dev
),
2767 size
+= sprintf(&buf
[size
],
2769 dev_name(&dd
->pdev
->dev
),
2775 size
+= sprintf(&buf
[size
], "Devices Being Removed:\n");
2776 list_for_each_entry_safe(dd
, tmp
, &removing_list
, remove_list
) {
2779 dd
->port
->identify
&&
2780 dd
->port
->identify_valid
) {
2782 (char *) (dd
->port
->identify
+10), 21);
2783 status
= *(dd
->port
->identify
+ 141);
2785 memset(id_buf
, 0, 42);
2790 test_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
)) {
2791 size
+= sprintf(&buf
[size
],
2792 " device %s %s (ftl rebuild %d %%)\n",
2793 dev_name(&dd
->pdev
->dev
),
2797 size
+= sprintf(&buf
[size
],
2799 dev_name(&dd
->pdev
->dev
),
2804 spin_unlock_irqrestore(&dev_lock
, flags
);
2809 static ssize_t
mtip_hw_read_device_status(struct file
*f
, char __user
*ubuf
,
2810 size_t len
, loff_t
*offset
)
2812 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2817 if (!len
|| *offset
)
2820 buf
= kzalloc(MTIP_DFS_MAX_BUF_SIZE
, GFP_KERNEL
);
2822 dev_err(&dd
->pdev
->dev
,
2823 "Memory allocation: status buffer\n");
2827 size
+= show_device_status(NULL
, buf
);
2829 *offset
= size
<= len
? size
: len
;
2830 size
= copy_to_user(ubuf
, buf
, *offset
);
2835 return rv
? rv
: *offset
;
2838 static ssize_t
mtip_hw_read_registers(struct file
*f
, char __user
*ubuf
,
2839 size_t len
, loff_t
*offset
)
2841 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2843 u32 group_allocated
;
2850 buf
= kzalloc(MTIP_DFS_MAX_BUF_SIZE
, GFP_KERNEL
);
2852 dev_err(&dd
->pdev
->dev
,
2853 "Memory allocation: register buffer\n");
2857 size
+= sprintf(&buf
[size
], "H/ S ACTive : [ 0x");
2859 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2860 size
+= sprintf(&buf
[size
], "%08X ",
2861 readl(dd
->port
->s_active
[n
]));
2863 size
+= sprintf(&buf
[size
], "]\n");
2864 size
+= sprintf(&buf
[size
], "H/ Command Issue : [ 0x");
2866 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2867 size
+= sprintf(&buf
[size
], "%08X ",
2868 readl(dd
->port
->cmd_issue
[n
]));
2870 size
+= sprintf(&buf
[size
], "]\n");
2871 size
+= sprintf(&buf
[size
], "H/ Completed : [ 0x");
2873 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2874 size
+= sprintf(&buf
[size
], "%08X ",
2875 readl(dd
->port
->completed
[n
]));
2877 size
+= sprintf(&buf
[size
], "]\n");
2878 size
+= sprintf(&buf
[size
], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
2879 readl(dd
->port
->mmio
+ PORT_IRQ_STAT
));
2880 size
+= sprintf(&buf
[size
], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
2881 readl(dd
->mmio
+ HOST_IRQ_STAT
));
2882 size
+= sprintf(&buf
[size
], "\n");
2884 size
+= sprintf(&buf
[size
], "L/ Allocated : [ 0x");
2886 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2887 if (sizeof(long) > sizeof(u32
))
2889 dd
->port
->allocated
[n
/2] >> (32*(n
&1));
2891 group_allocated
= dd
->port
->allocated
[n
];
2892 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2894 size
+= sprintf(&buf
[size
], "]\n");
2896 size
+= sprintf(&buf
[size
], "L/ Commands in Q : [ 0x");
2898 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2899 if (sizeof(long) > sizeof(u32
))
2901 dd
->port
->cmds_to_issue
[n
/2] >> (32*(n
&1));
2903 group_allocated
= dd
->port
->cmds_to_issue
[n
];
2904 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2906 size
+= sprintf(&buf
[size
], "]\n");
2908 *offset
= size
<= len
? size
: len
;
2909 size
= copy_to_user(ubuf
, buf
, *offset
);
2914 return rv
? rv
: *offset
;
2917 static ssize_t
mtip_hw_read_flags(struct file
*f
, char __user
*ubuf
,
2918 size_t len
, loff_t
*offset
)
2920 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2928 buf
= kzalloc(MTIP_DFS_MAX_BUF_SIZE
, GFP_KERNEL
);
2930 dev_err(&dd
->pdev
->dev
,
2931 "Memory allocation: flag buffer\n");
2935 size
+= sprintf(&buf
[size
], "Flag-port : [ %08lX ]\n",
2937 size
+= sprintf(&buf
[size
], "Flag-dd : [ %08lX ]\n",
2940 *offset
= size
<= len
? size
: len
;
2941 size
= copy_to_user(ubuf
, buf
, *offset
);
2946 return rv
? rv
: *offset
;
2949 static const struct file_operations mtip_device_status_fops
= {
2950 .owner
= THIS_MODULE
,
2951 .open
= simple_open
,
2952 .read
= mtip_hw_read_device_status
,
2953 .llseek
= no_llseek
,
2956 static const struct file_operations mtip_regs_fops
= {
2957 .owner
= THIS_MODULE
,
2958 .open
= simple_open
,
2959 .read
= mtip_hw_read_registers
,
2960 .llseek
= no_llseek
,
2963 static const struct file_operations mtip_flags_fops
= {
2964 .owner
= THIS_MODULE
,
2965 .open
= simple_open
,
2966 .read
= mtip_hw_read_flags
,
2967 .llseek
= no_llseek
,
2971 * Create the sysfs related attributes.
2973 * @dd Pointer to the driver data structure.
2974 * @kobj Pointer to the kobj for the block device.
2977 * 0 Operation completed successfully.
2978 * -EINVAL Invalid parameter.
2980 static int mtip_hw_sysfs_init(struct driver_data
*dd
, struct kobject
*kobj
)
2985 if (sysfs_create_file(kobj
, &dev_attr_status
.attr
))
2986 dev_warn(&dd
->pdev
->dev
,
2987 "Error creating 'status' sysfs entry\n");
2992 * Remove the sysfs related attributes.
2994 * @dd Pointer to the driver data structure.
2995 * @kobj Pointer to the kobj for the block device.
2998 * 0 Operation completed successfully.
2999 * -EINVAL Invalid parameter.
3001 static int mtip_hw_sysfs_exit(struct driver_data
*dd
, struct kobject
*kobj
)
3006 sysfs_remove_file(kobj
, &dev_attr_status
.attr
);
3011 static int mtip_hw_debugfs_init(struct driver_data
*dd
)
3016 dd
->dfs_node
= debugfs_create_dir(dd
->disk
->disk_name
, dfs_parent
);
3017 if (IS_ERR_OR_NULL(dd
->dfs_node
)) {
3018 dev_warn(&dd
->pdev
->dev
,
3019 "Error creating node %s under debugfs\n",
3020 dd
->disk
->disk_name
);
3021 dd
->dfs_node
= NULL
;
3025 debugfs_create_file("flags", S_IRUGO
, dd
->dfs_node
, dd
,
3027 debugfs_create_file("registers", S_IRUGO
, dd
->dfs_node
, dd
,
3033 static void mtip_hw_debugfs_exit(struct driver_data
*dd
)
3036 debugfs_remove_recursive(dd
->dfs_node
);
3039 static int mtip_free_orphan(struct driver_data
*dd
)
3041 struct kobject
*kobj
;
3044 if (dd
->bdev
->bd_holders
>= 1)
3051 mtip_hw_debugfs_exit(dd
);
3053 spin_lock(&rssd_index_lock
);
3054 ida_remove(&rssd_index_ida
, dd
->index
);
3055 spin_unlock(&rssd_index_lock
);
3057 if (!test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
) &&
3058 test_bit(MTIP_DDF_REBUILD_FAILED_BIT
, &dd
->dd_flag
)) {
3062 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3064 mtip_hw_sysfs_exit(dd
, kobj
);
3067 del_gendisk(dd
->disk
);
3071 dd
->queue
->queuedata
= NULL
;
3072 blk_cleanup_queue(dd
->queue
);
3081 * Perform any init/resume time hardware setup
3083 * @dd Pointer to the driver data structure.
3088 static inline void hba_setup(struct driver_data
*dd
)
3091 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
3093 /* interrupt bug workaround: use only 1 IS bit.*/
3095 HSORG_DISABLE_SLOTGRP_INTR
|
3096 HSORG_DISABLE_SLOTGRP_PXIS
,
3097 dd
->mmio
+ HOST_HSORG
);
3100 static int mtip_device_unaligned_constrained(struct driver_data
*dd
)
3102 return (dd
->pdev
->device
== P420M_DEVICE_ID
? 1 : 0);
3106 * Detect the details of the product, and store anything needed
3107 * into the driver data structure. This includes product type and
3108 * version and number of slot groups.
3110 * @dd Pointer to the driver data structure.
3115 static void mtip_detect_product(struct driver_data
*dd
)
3118 unsigned int rev
, slotgroups
;
3121 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
3123 * [15:8] hardware/software interface rev#
3124 * [ 3] asic-style interface
3125 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
3127 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
3129 dd
->product_type
= MTIP_PRODUCT_UNKNOWN
;
3130 dd
->slot_groups
= 1;
3133 dd
->product_type
= MTIP_PRODUCT_ASICFPGA
;
3134 rev
= (hwdata
& HSORG_HWREV
) >> 8;
3135 slotgroups
= (hwdata
& HSORG_SLOTGROUPS
) + 1;
3136 dev_info(&dd
->pdev
->dev
,
3137 "ASIC-FPGA design, HS rev 0x%x, "
3138 "%i slot groups [%i slots]\n",
3143 if (slotgroups
> MTIP_MAX_SLOT_GROUPS
) {
3144 dev_warn(&dd
->pdev
->dev
,
3145 "Warning: driver only supports "
3146 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS
);
3147 slotgroups
= MTIP_MAX_SLOT_GROUPS
;
3149 dd
->slot_groups
= slotgroups
;
3153 dev_warn(&dd
->pdev
->dev
, "Unrecognized product id\n");
3157 * Blocking wait for FTL rebuild to complete
3159 * @dd Pointer to the DRIVER_DATA structure.
3162 * 0 FTL rebuild completed successfully
3163 * -EFAULT FTL rebuild error/timeout/interruption
3165 static int mtip_ftl_rebuild_poll(struct driver_data
*dd
)
3167 unsigned long timeout
, cnt
= 0, start
;
3169 dev_warn(&dd
->pdev
->dev
,
3170 "FTL rebuild in progress. Polling for completion.\n");
3173 timeout
= jiffies
+ msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS
);
3176 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
3179 if (mtip_check_surprise_removal(dd
->pdev
))
3182 if (mtip_get_identify(dd
->port
, NULL
) < 0)
3185 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
3186 MTIP_FTL_REBUILD_MAGIC
) {
3188 /* Print message every 3 minutes */
3190 dev_warn(&dd
->pdev
->dev
,
3191 "FTL rebuild in progress (%d secs).\n",
3192 jiffies_to_msecs(jiffies
- start
) / 1000);
3196 dev_warn(&dd
->pdev
->dev
,
3197 "FTL rebuild complete (%d secs).\n",
3198 jiffies_to_msecs(jiffies
- start
) / 1000);
3199 mtip_block_initialize(dd
);
3203 } while (time_before(jiffies
, timeout
));
3205 /* Check for timeout */
3206 dev_err(&dd
->pdev
->dev
,
3207 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
3208 jiffies_to_msecs(jiffies
- start
) / 1000);
3213 * service thread to issue queued commands
3215 * @data Pointer to the driver data structure.
3221 static int mtip_service_thread(void *data
)
3223 struct driver_data
*dd
= (struct driver_data
*)data
;
3224 unsigned long slot
, slot_start
, slot_wrap
;
3225 unsigned int num_cmd_slots
= dd
->slot_groups
* 32;
3226 struct mtip_port
*port
= dd
->port
;
3231 * the condition is to check neither an internal command is
3232 * is in progress nor error handling is active
3234 wait_event_interruptible(port
->svc_wait
, (port
->flags
) &&
3235 !(port
->flags
& MTIP_PF_PAUSE_IO
));
3237 if (kthread_should_stop())
3240 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
3242 /* If I am an orphan, start self cleanup */
3243 if (test_bit(MTIP_PF_SR_CLEANUP_BIT
, &port
->flags
))
3246 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
3250 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
3252 /* used to restrict the loop to one iteration */
3253 slot_start
= num_cmd_slots
;
3256 slot
= find_next_bit(port
->cmds_to_issue
,
3257 num_cmd_slots
, slot
);
3258 if (slot_wrap
== 1) {
3259 if ((slot_start
>= slot
) ||
3260 (slot
>= num_cmd_slots
))
3263 if (unlikely(slot_start
== num_cmd_slots
))
3266 if (unlikely(slot
== num_cmd_slots
)) {
3272 /* Issue the command to the hardware */
3273 mtip_issue_ncq_command(port
, slot
);
3275 clear_bit(slot
, port
->cmds_to_issue
);
3278 clear_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
3279 } else if (test_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
)) {
3280 if (mtip_ftl_rebuild_poll(dd
) < 0)
3281 set_bit(MTIP_DDF_REBUILD_FAILED_BIT
,
3283 clear_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
);
3285 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
3287 if (test_bit(MTIP_PF_SVC_THD_STOP_BIT
, &port
->flags
))
3291 /* wait for pci remove to exit */
3293 if (test_bit(MTIP_DDF_REMOVE_DONE_BIT
, &dd
->dd_flag
))
3295 msleep_interruptible(1000);
3296 if (kthread_should_stop())
3301 ret
= mtip_free_orphan(dd
);
3303 /* NOTE: All data structures are invalid, do not
3304 * access any here */
3307 msleep_interruptible(1000);
3308 if (kthread_should_stop())
3316 * Called once for each card.
3318 * @dd Pointer to the driver data structure.
3321 * 0 on success, else an error code.
3323 static int mtip_hw_init(struct driver_data
*dd
)
3327 unsigned int num_command_slots
;
3328 unsigned long timeout
, timetaken
;
3330 struct smart_attr attr242
;
3332 dd
->mmio
= pcim_iomap_table(dd
->pdev
)[MTIP_ABAR
];
3334 mtip_detect_product(dd
);
3335 if (dd
->product_type
== MTIP_PRODUCT_UNKNOWN
) {
3339 num_command_slots
= dd
->slot_groups
* 32;
3343 dd
->port
= kzalloc_node(sizeof(struct mtip_port
), GFP_KERNEL
,
3346 dev_err(&dd
->pdev
->dev
,
3347 "Memory allocation: port structure\n");
3351 /* Continue workqueue setup */
3352 for (i
= 0; i
< MTIP_MAX_SLOT_GROUPS
; i
++)
3353 dd
->work
[i
].port
= dd
->port
;
3355 /* Enable unaligned IO constraints for some devices */
3356 if (mtip_device_unaligned_constrained(dd
))
3357 dd
->unal_qdepth
= MTIP_MAX_UNALIGNED_SLOTS
;
3359 dd
->unal_qdepth
= 0;
3361 /* Counting semaphore to track command slot usage */
3362 sema_init(&dd
->port
->cmd_slot
, num_command_slots
- 1 - dd
->unal_qdepth
);
3363 sema_init(&dd
->port
->cmd_slot_unal
, dd
->unal_qdepth
);
3365 /* Spinlock to prevent concurrent issue */
3366 for (i
= 0; i
< MTIP_MAX_SLOT_GROUPS
; i
++)
3367 spin_lock_init(&dd
->port
->cmd_issue_lock
[i
]);
3369 /* Set the port mmio base address. */
3370 dd
->port
->mmio
= dd
->mmio
+ PORT_OFFSET
;
3373 /* Allocate memory for the command list. */
3374 dd
->port
->command_list
=
3375 dmam_alloc_coherent(&dd
->pdev
->dev
,
3376 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3377 &dd
->port
->command_list_dma
,
3379 if (!dd
->port
->command_list
) {
3380 dev_err(&dd
->pdev
->dev
,
3381 "Memory allocation: command list\n");
3386 /* Clear the memory we have allocated. */
3387 memset(dd
->port
->command_list
,
3389 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4));
3391 /* Setup the addresse of the RX FIS. */
3392 dd
->port
->rxfis
= dd
->port
->command_list
+ HW_CMD_SLOT_SZ
;
3393 dd
->port
->rxfis_dma
= dd
->port
->command_list_dma
+ HW_CMD_SLOT_SZ
;
3395 /* Setup the address of the command tables. */
3396 dd
->port
->command_table
= dd
->port
->rxfis
+ AHCI_RX_FIS_SZ
;
3397 dd
->port
->command_tbl_dma
= dd
->port
->rxfis_dma
+ AHCI_RX_FIS_SZ
;
3399 /* Setup the address of the identify data. */
3400 dd
->port
->identify
= dd
->port
->command_table
+
3402 dd
->port
->identify_dma
= dd
->port
->command_tbl_dma
+
3405 /* Setup the address of the sector buffer - for some non-ncq cmds */
3406 dd
->port
->sector_buffer
= (void *) dd
->port
->identify
+ ATA_SECT_SIZE
;
3407 dd
->port
->sector_buffer_dma
= dd
->port
->identify_dma
+ ATA_SECT_SIZE
;
3409 /* Setup the address of the log buf - for read log command */
3410 dd
->port
->log_buf
= (void *)dd
->port
->sector_buffer
+ ATA_SECT_SIZE
;
3411 dd
->port
->log_buf_dma
= dd
->port
->sector_buffer_dma
+ ATA_SECT_SIZE
;
3413 /* Setup the address of the smart buf - for smart read data command */
3414 dd
->port
->smart_buf
= (void *)dd
->port
->log_buf
+ ATA_SECT_SIZE
;
3415 dd
->port
->smart_buf_dma
= dd
->port
->log_buf_dma
+ ATA_SECT_SIZE
;
3418 /* Point the command headers at the command tables. */
3419 for (i
= 0; i
< num_command_slots
; i
++) {
3420 dd
->port
->commands
[i
].command_header
=
3421 dd
->port
->command_list
+
3422 (sizeof(struct mtip_cmd_hdr
) * i
);
3423 dd
->port
->commands
[i
].command_header_dma
=
3424 dd
->port
->command_list_dma
+
3425 (sizeof(struct mtip_cmd_hdr
) * i
);
3427 dd
->port
->commands
[i
].command
=
3428 dd
->port
->command_table
+ (HW_CMD_TBL_SZ
* i
);
3429 dd
->port
->commands
[i
].command_dma
=
3430 dd
->port
->command_tbl_dma
+ (HW_CMD_TBL_SZ
* i
);
3432 if (readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
)
3433 dd
->port
->commands
[i
].command_header
->ctbau
=
3434 __force_bit2int
cpu_to_le32(
3435 (dd
->port
->commands
[i
].command_dma
>> 16) >> 16);
3436 dd
->port
->commands
[i
].command_header
->ctba
=
3437 __force_bit2int
cpu_to_le32(
3438 dd
->port
->commands
[i
].command_dma
& 0xFFFFFFFF);
3441 * If this is not done, a bug is reported by the stock
3442 * FC11 i386. Due to the fact that it has lots of kernel
3443 * debugging enabled.
3445 sg_init_table(dd
->port
->commands
[i
].sg
, MTIP_MAX_SG
);
3447 /* Mark all commands as currently inactive.*/
3448 atomic_set(&dd
->port
->commands
[i
].active
, 0);
3451 /* Setup the pointers to the extended s_active and CI registers. */
3452 for (i
= 0; i
< dd
->slot_groups
; i
++) {
3453 dd
->port
->s_active
[i
] =
3454 dd
->port
->mmio
+ i
*0x80 + PORT_SCR_ACT
;
3455 dd
->port
->cmd_issue
[i
] =
3456 dd
->port
->mmio
+ i
*0x80 + PORT_COMMAND_ISSUE
;
3457 dd
->port
->completed
[i
] =
3458 dd
->port
->mmio
+ i
*0x80 + PORT_SDBV
;
3461 timetaken
= jiffies
;
3462 timeout
= jiffies
+ msecs_to_jiffies(30000);
3463 while (((readl(dd
->port
->mmio
+ PORT_SCR_STAT
) & 0x0F) != 0x03) &&
3464 time_before(jiffies
, timeout
)) {
3467 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
3468 timetaken
= jiffies
- timetaken
;
3469 dev_warn(&dd
->pdev
->dev
,
3470 "Surprise removal detected at %u ms\n",
3471 jiffies_to_msecs(timetaken
));
3475 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
3476 timetaken
= jiffies
- timetaken
;
3477 dev_warn(&dd
->pdev
->dev
,
3478 "Removal detected at %u ms\n",
3479 jiffies_to_msecs(timetaken
));
3484 /* Conditionally reset the HBA. */
3485 if (!(readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_NZDMA
)) {
3486 if (mtip_hba_reset(dd
) < 0) {
3487 dev_err(&dd
->pdev
->dev
,
3488 "Card did not reset within timeout\n");
3493 /* Clear any pending interrupts on the HBA */
3494 writel(readl(dd
->mmio
+ HOST_IRQ_STAT
),
3495 dd
->mmio
+ HOST_IRQ_STAT
);
3498 mtip_init_port(dd
->port
);
3499 mtip_start_port(dd
->port
);
3501 /* Setup the ISR and enable interrupts. */
3502 rv
= devm_request_irq(&dd
->pdev
->dev
,
3506 dev_driver_string(&dd
->pdev
->dev
),
3510 dev_err(&dd
->pdev
->dev
,
3511 "Unable to allocate IRQ %d\n", dd
->pdev
->irq
);
3514 irq_set_affinity_hint(dd
->pdev
->irq
, get_cpu_mask(dd
->isr_binding
));
3516 /* Enable interrupts on the HBA. */
3517 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3518 dd
->mmio
+ HOST_CTL
);
3520 init_timer(&dd
->port
->cmd_timer
);
3521 init_waitqueue_head(&dd
->port
->svc_wait
);
3523 dd
->port
->cmd_timer
.data
= (unsigned long int) dd
->port
;
3524 dd
->port
->cmd_timer
.function
= mtip_timeout_function
;
3525 mod_timer(&dd
->port
->cmd_timer
,
3526 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
3529 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)) {
3534 if (mtip_get_identify(dd
->port
, NULL
) < 0) {
3538 mtip_dump_identify(dd
->port
);
3540 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
3541 MTIP_FTL_REBUILD_MAGIC
) {
3542 set_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
);
3543 return MTIP_FTL_REBUILD_MAGIC
;
3546 /* check write protect, over temp and rebuild statuses */
3547 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
3549 dd
->port
->log_buf_dma
, 1);
3551 dev_warn(&dd
->pdev
->dev
,
3552 "Error in READ LOG EXT (10h) command\n");
3553 /* non-critical error, don't fail the load */
3555 buf
= (unsigned char *)dd
->port
->log_buf
;
3556 if (buf
[259] & 0x1) {
3557 dev_info(&dd
->pdev
->dev
,
3558 "Write protect bit is set.\n");
3559 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
3561 if (buf
[288] == 0xF7) {
3562 dev_info(&dd
->pdev
->dev
,
3563 "Exceeded Tmax, drive in thermal shutdown.\n");
3564 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
3566 if (buf
[288] == 0xBF) {
3567 dev_info(&dd
->pdev
->dev
,
3568 "Drive is in security locked state.\n");
3569 set_bit(MTIP_DDF_SEC_LOCK_BIT
, &dd
->dd_flag
);
3573 /* get write protect progess */
3574 memset(&attr242
, 0, sizeof(struct smart_attr
));
3575 if (mtip_get_smart_attr(dd
->port
, 242, &attr242
))
3576 dev_warn(&dd
->pdev
->dev
,
3577 "Unable to check write protect progress\n");
3579 dev_info(&dd
->pdev
->dev
,
3580 "Write protect progress: %u%% (%u blocks)\n",
3581 attr242
.cur
, le32_to_cpu(attr242
.data
));
3585 del_timer_sync(&dd
->port
->cmd_timer
);
3587 /* Disable interrupts on the HBA. */
3588 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3589 dd
->mmio
+ HOST_CTL
);
3591 /* Release the IRQ. */
3592 irq_set_affinity_hint(dd
->pdev
->irq
, NULL
);
3593 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3596 mtip_deinit_port(dd
->port
);
3598 /* Free the command/command header memory. */
3599 dmam_free_coherent(&dd
->pdev
->dev
,
3600 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3601 dd
->port
->command_list
,
3602 dd
->port
->command_list_dma
);
3604 /* Free the memory allocated for the for structure. */
3611 * Called to deinitialize an interface.
3613 * @dd Pointer to the driver data structure.
3618 static int mtip_hw_exit(struct driver_data
*dd
)
3621 * Send standby immediate (E0h) to the drive so that it
3625 if (!test_bit(MTIP_DDF_REBUILD_FAILED_BIT
, &dd
->dd_flag
))
3626 if (mtip_standby_immediate(dd
->port
))
3627 dev_warn(&dd
->pdev
->dev
,
3628 "STANDBY IMMEDIATE failed\n");
3630 /* de-initialize the port. */
3631 mtip_deinit_port(dd
->port
);
3633 /* Disable interrupts on the HBA. */
3634 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3635 dd
->mmio
+ HOST_CTL
);
3638 del_timer_sync(&dd
->port
->cmd_timer
);
3640 /* Release the IRQ. */
3641 irq_set_affinity_hint(dd
->pdev
->irq
, NULL
);
3642 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3644 /* Free the command/command header memory. */
3645 dmam_free_coherent(&dd
->pdev
->dev
,
3646 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3647 dd
->port
->command_list
,
3648 dd
->port
->command_list_dma
);
3649 /* Free the memory allocated for the for structure. */
3657 * Issue a Standby Immediate command to the device.
3659 * This function is called by the Block Layer just before the
3660 * system powers off during a shutdown.
3662 * @dd Pointer to the driver data structure.
3667 static int mtip_hw_shutdown(struct driver_data
*dd
)
3670 * Send standby immediate (E0h) to the drive so that it
3673 if (!dd
->sr
&& dd
->port
)
3674 mtip_standby_immediate(dd
->port
);
3682 * This function is called by the Block Layer just before the
3683 * system hibernates.
3685 * @dd Pointer to the driver data structure.
3688 * 0 Suspend was successful
3689 * -EFAULT Suspend was not successful
3691 static int mtip_hw_suspend(struct driver_data
*dd
)
3694 * Send standby immediate (E0h) to the drive
3695 * so that it saves its state.
3697 if (mtip_standby_immediate(dd
->port
) != 0) {
3698 dev_err(&dd
->pdev
->dev
,
3699 "Failed standby-immediate command\n");
3703 /* Disable interrupts on the HBA.*/
3704 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3705 dd
->mmio
+ HOST_CTL
);
3706 mtip_deinit_port(dd
->port
);
3714 * This function is called by the Block Layer as the
3717 * @dd Pointer to the driver data structure.
3720 * 0 Resume was successful
3721 * -EFAULT Resume was not successful
3723 static int mtip_hw_resume(struct driver_data
*dd
)
3725 /* Perform any needed hardware setup steps */
3729 if (mtip_hba_reset(dd
) != 0) {
3730 dev_err(&dd
->pdev
->dev
,
3731 "Unable to reset the HBA\n");
3736 * Enable the port, DMA engine, and FIS reception specific
3737 * h/w in controller.
3739 mtip_init_port(dd
->port
);
3740 mtip_start_port(dd
->port
);
3742 /* Enable interrupts on the HBA.*/
3743 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3744 dd
->mmio
+ HOST_CTL
);
3750 * Helper function for reusing disk name
3751 * upon hot insertion.
3753 static int rssd_disk_name_format(char *prefix
,
3758 const int base
= 'z' - 'a' + 1;
3759 char *begin
= buf
+ strlen(prefix
);
3760 char *end
= buf
+ buflen
;
3770 *--p
= 'a' + (index
% unit
);
3771 index
= (index
/ unit
) - 1;
3772 } while (index
>= 0);
3774 memmove(begin
, p
, end
- p
);
3775 memcpy(buf
, prefix
, strlen(prefix
));
3781 * Block layer IOCTL handler.
3783 * @dev Pointer to the block_device structure.
3785 * @cmd IOCTL command passed from the user application.
3786 * @arg Argument passed from the user application.
3789 * 0 IOCTL completed successfully.
3790 * -ENOTTY IOCTL not supported or invalid driver data
3791 * structure pointer.
3793 static int mtip_block_ioctl(struct block_device
*dev
,
3798 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3800 if (!capable(CAP_SYS_ADMIN
))
3806 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3813 return mtip_hw_ioctl(dd
, cmd
, arg
);
3817 #ifdef CONFIG_COMPAT
3819 * Block layer compat IOCTL handler.
3821 * @dev Pointer to the block_device structure.
3823 * @cmd IOCTL command passed from the user application.
3824 * @arg Argument passed from the user application.
3827 * 0 IOCTL completed successfully.
3828 * -ENOTTY IOCTL not supported or invalid driver data
3829 * structure pointer.
3831 static int mtip_block_compat_ioctl(struct block_device
*dev
,
3836 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3838 if (!capable(CAP_SYS_ADMIN
))
3844 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3850 case HDIO_DRIVE_TASKFILE
: {
3851 struct mtip_compat_ide_task_request_s __user
*compat_req_task
;
3852 ide_task_request_t req_task
;
3853 int compat_tasksize
, outtotal
, ret
;
3856 sizeof(struct mtip_compat_ide_task_request_s
);
3859 (struct mtip_compat_ide_task_request_s __user
*) arg
;
3861 if (copy_from_user(&req_task
, (void __user
*) arg
,
3862 compat_tasksize
- (2 * sizeof(compat_long_t
))))
3865 if (get_user(req_task
.out_size
, &compat_req_task
->out_size
))
3868 if (get_user(req_task
.in_size
, &compat_req_task
->in_size
))
3871 outtotal
= sizeof(struct mtip_compat_ide_task_request_s
);
3873 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
3874 &req_task
, outtotal
);
3876 if (copy_to_user((void __user
*) arg
, &req_task
,
3878 (2 * sizeof(compat_long_t
))))
3881 if (put_user(req_task
.out_size
, &compat_req_task
->out_size
))
3884 if (put_user(req_task
.in_size
, &compat_req_task
->in_size
))
3890 return mtip_hw_ioctl(dd
, cmd
, arg
);
3896 * Obtain the geometry of the device.
3898 * You may think that this function is obsolete, but some applications,
3899 * fdisk for example still used CHS values. This function describes the
3900 * device as having 224 heads and 56 sectors per cylinder. These values are
3901 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
3902 * partition is described in terms of a start and end cylinder this means
3903 * that each partition is also 4KB aligned. Non-aligned partitions adversely
3904 * affects performance.
3906 * @dev Pointer to the block_device strucutre.
3907 * @geo Pointer to a hd_geometry structure.
3910 * 0 Operation completed successfully.
3911 * -ENOTTY An error occurred while reading the drive capacity.
3913 static int mtip_block_getgeo(struct block_device
*dev
,
3914 struct hd_geometry
*geo
)
3916 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3922 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3923 dev_warn(&dd
->pdev
->dev
,
3924 "Could not get drive capacity.\n");
3930 sector_div(capacity
, (geo
->heads
* geo
->sectors
));
3931 geo
->cylinders
= capacity
;
3936 * Block device operation function.
3938 * This structure contains pointers to the functions required by the block
3941 static const struct block_device_operations mtip_block_ops
= {
3942 .ioctl
= mtip_block_ioctl
,
3943 #ifdef CONFIG_COMPAT
3944 .compat_ioctl
= mtip_block_compat_ioctl
,
3946 .getgeo
= mtip_block_getgeo
,
3947 .owner
= THIS_MODULE
3951 * Block layer make request function.
3953 * This function is called by the kernel to process a BIO for
3956 * @queue Pointer to the request queue. Unused other than to obtain
3957 * the driver data structure.
3958 * @bio Pointer to the BIO.
3961 static void mtip_make_request(struct request_queue
*queue
, struct bio
*bio
)
3963 struct driver_data
*dd
= queue
->queuedata
;
3964 struct scatterlist
*sg
;
3965 struct bio_vec
*bvec
;
3967 int tag
= 0, unaligned
= 0;
3969 if (unlikely(dd
->dd_flag
& MTIP_DDF_STOP_IO
)) {
3970 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
3972 bio_endio(bio
, -ENXIO
);
3975 if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))) {
3976 bio_endio(bio
, -ENODATA
);
3979 if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT
,
3981 bio_data_dir(bio
))) {
3982 bio_endio(bio
, -ENODATA
);
3985 if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT
, &dd
->dd_flag
))) {
3986 bio_endio(bio
, -ENODATA
);
3989 if (test_bit(MTIP_DDF_REBUILD_FAILED_BIT
, &dd
->dd_flag
)) {
3990 bio_endio(bio
, -ENXIO
);
3995 if (unlikely(bio
->bi_rw
& REQ_DISCARD
)) {
3996 bio_endio(bio
, mtip_send_trim(dd
, bio
->bi_iter
.bi_sector
,
4001 if (unlikely(!bio_has_data(bio
))) {
4002 blk_queue_flush(queue
, 0);
4007 if (bio_data_dir(bio
) == WRITE
&& bio_sectors(bio
) <= 64 &&
4009 if (bio
->bi_iter
.bi_sector
% 8 != 0)
4010 /* Unaligned on 4k boundaries */
4012 else if (bio_sectors(bio
) % 8 != 0) /* Aligned but not 4k/8k */
4016 sg
= mtip_hw_get_scatterlist(dd
, &tag
, unaligned
);
4017 if (likely(sg
!= NULL
)) {
4018 blk_queue_bounce(queue
, &bio
);
4020 if (unlikely((bio
)->bi_vcnt
> MTIP_MAX_SG
)) {
4021 dev_warn(&dd
->pdev
->dev
,
4022 "Maximum number of SGL entries exceeded\n");
4024 mtip_hw_release_scatterlist(dd
, tag
, unaligned
);
4028 /* Create the scatter list for this bio. */
4029 bio_for_each_segment(bvec
, bio
, i
) {
4030 sg_set_page(&sg
[nents
],
4037 /* Issue the read/write. */
4038 mtip_hw_submit_io(dd
,
4039 bio
->bi_iter
.bi_sector
,
4052 * Block layer initialization function.
4054 * This function is called once by the PCI layer for each P320
4055 * device that is connected to the system.
4057 * @dd Pointer to the driver data structure.
4060 * 0 on success else an error code.
4062 static int mtip_block_initialize(struct driver_data
*dd
)
4064 int rv
= 0, wait_for_rebuild
= 0;
4066 unsigned int index
= 0;
4067 struct kobject
*kobj
;
4068 unsigned char thd_name
[16];
4071 goto skip_create_disk
; /* hw init done, before rebuild */
4073 /* Initialize the protocol layer. */
4074 wait_for_rebuild
= mtip_hw_init(dd
);
4075 if (wait_for_rebuild
< 0) {
4076 dev_err(&dd
->pdev
->dev
,
4077 "Protocol layer initialization failed\n");
4079 goto protocol_init_error
;
4082 dd
->disk
= alloc_disk_node(MTIP_MAX_MINORS
, dd
->numa_node
);
4083 if (dd
->disk
== NULL
) {
4084 dev_err(&dd
->pdev
->dev
,
4085 "Unable to allocate gendisk structure\n");
4087 goto alloc_disk_error
;
4090 /* Generate the disk name, implemented same as in sd.c */
4092 if (!ida_pre_get(&rssd_index_ida
, GFP_KERNEL
))
4095 spin_lock(&rssd_index_lock
);
4096 rv
= ida_get_new(&rssd_index_ida
, &index
);
4097 spin_unlock(&rssd_index_lock
);
4098 } while (rv
== -EAGAIN
);
4103 rv
= rssd_disk_name_format("rssd",
4105 dd
->disk
->disk_name
,
4108 goto disk_index_error
;
4110 dd
->disk
->driverfs_dev
= &dd
->pdev
->dev
;
4111 dd
->disk
->major
= dd
->major
;
4112 dd
->disk
->first_minor
= dd
->instance
* MTIP_MAX_MINORS
;
4113 dd
->disk
->fops
= &mtip_block_ops
;
4114 dd
->disk
->private_data
= dd
;
4117 mtip_hw_debugfs_init(dd
);
4120 * if rebuild pending, start the service thread, and delay the block
4121 * queue creation and add_disk()
4123 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
4124 goto start_service_thread
;
4127 /* Allocate the request queue. */
4128 dd
->queue
= blk_alloc_queue_node(GFP_KERNEL
, dd
->numa_node
);
4129 if (dd
->queue
== NULL
) {
4130 dev_err(&dd
->pdev
->dev
,
4131 "Unable to allocate request queue\n");
4133 goto block_queue_alloc_init_error
;
4136 /* Attach our request function to the request queue. */
4137 blk_queue_make_request(dd
->queue
, mtip_make_request
);
4139 dd
->disk
->queue
= dd
->queue
;
4140 dd
->queue
->queuedata
= dd
;
4142 /* Set device limits. */
4143 set_bit(QUEUE_FLAG_NONROT
, &dd
->queue
->queue_flags
);
4144 blk_queue_max_segments(dd
->queue
, MTIP_MAX_SG
);
4145 blk_queue_physical_block_size(dd
->queue
, 4096);
4146 blk_queue_max_hw_sectors(dd
->queue
, 0xffff);
4147 blk_queue_max_segment_size(dd
->queue
, 0x400000);
4148 blk_queue_io_min(dd
->queue
, 4096);
4151 * write back cache is not supported in the device. FUA depends on
4152 * write back cache support, hence setting flush support to zero.
4154 blk_queue_flush(dd
->queue
, 0);
4156 /* Signal trim support */
4157 if (dd
->trim_supp
== true) {
4158 set_bit(QUEUE_FLAG_DISCARD
, &dd
->queue
->queue_flags
);
4159 dd
->queue
->limits
.discard_granularity
= 4096;
4160 blk_queue_max_discard_sectors(dd
->queue
,
4161 MTIP_MAX_TRIM_ENTRY_LEN
* MTIP_MAX_TRIM_ENTRIES
);
4162 dd
->queue
->limits
.discard_zeroes_data
= 0;
4165 /* Set the capacity of the device in 512 byte sectors. */
4166 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
4167 dev_warn(&dd
->pdev
->dev
,
4168 "Could not read drive capacity\n");
4170 goto read_capacity_error
;
4172 set_capacity(dd
->disk
, capacity
);
4174 /* Enable the block device and add it to /dev */
4177 dd
->bdev
= bdget_disk(dd
->disk
, 0);
4179 * Now that the disk is active, initialize any sysfs attributes
4180 * managed by the protocol layer.
4182 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
4184 mtip_hw_sysfs_init(dd
, kobj
);
4188 if (dd
->mtip_svc_handler
) {
4189 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
4190 return rv
; /* service thread created for handling rebuild */
4193 start_service_thread
:
4194 sprintf(thd_name
, "mtip_svc_thd_%02d", index
);
4195 dd
->mtip_svc_handler
= kthread_create_on_node(mtip_service_thread
,
4196 dd
, dd
->numa_node
, "%s",
4199 if (IS_ERR(dd
->mtip_svc_handler
)) {
4200 dev_err(&dd
->pdev
->dev
, "service thread failed to start\n");
4201 dd
->mtip_svc_handler
= NULL
;
4203 goto kthread_run_error
;
4205 wake_up_process(dd
->mtip_svc_handler
);
4206 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
4207 rv
= wait_for_rebuild
;
4215 /* Delete our gendisk. This also removes the device from /dev */
4216 del_gendisk(dd
->disk
);
4218 read_capacity_error
:
4219 blk_cleanup_queue(dd
->queue
);
4221 block_queue_alloc_init_error
:
4222 mtip_hw_debugfs_exit(dd
);
4224 spin_lock(&rssd_index_lock
);
4225 ida_remove(&rssd_index_ida
, index
);
4226 spin_unlock(&rssd_index_lock
);
4232 mtip_hw_exit(dd
); /* De-initialize the protocol layer. */
4234 protocol_init_error
:
4239 * Block layer deinitialization function.
4241 * Called by the PCI layer as each P320 device is removed.
4243 * @dd Pointer to the driver data structure.
4248 static int mtip_block_remove(struct driver_data
*dd
)
4250 struct kobject
*kobj
;
4253 mtip_hw_debugfs_exit(dd
);
4255 if (dd
->mtip_svc_handler
) {
4256 set_bit(MTIP_PF_SVC_THD_STOP_BIT
, &dd
->port
->flags
);
4257 wake_up_interruptible(&dd
->port
->svc_wait
);
4258 kthread_stop(dd
->mtip_svc_handler
);
4261 /* Clean up the sysfs attributes, if created */
4262 if (test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
)) {
4263 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
4265 mtip_hw_sysfs_exit(dd
, kobj
);
4270 * Delete our gendisk structure. This also removes the device
4278 if (dd
->disk
->queue
) {
4279 del_gendisk(dd
->disk
);
4280 blk_cleanup_queue(dd
->queue
);
4287 spin_lock(&rssd_index_lock
);
4288 ida_remove(&rssd_index_ida
, dd
->index
);
4289 spin_unlock(&rssd_index_lock
);
4291 dev_info(&dd
->pdev
->dev
, "device %s surprise removal\n",
4292 dd
->disk
->disk_name
);
4295 /* De-initialize the protocol layer. */
4302 * Function called by the PCI layer when just before the
4303 * machine shuts down.
4305 * If a protocol layer shutdown function is present it will be called
4308 * @dd Pointer to the driver data structure.
4313 static int mtip_block_shutdown(struct driver_data
*dd
)
4315 /* Delete our gendisk structure, and cleanup the blk queue. */
4317 dev_info(&dd
->pdev
->dev
,
4318 "Shutting down %s ...\n", dd
->disk
->disk_name
);
4320 if (dd
->disk
->queue
) {
4321 del_gendisk(dd
->disk
);
4322 blk_cleanup_queue(dd
->queue
);
4329 spin_lock(&rssd_index_lock
);
4330 ida_remove(&rssd_index_ida
, dd
->index
);
4331 spin_unlock(&rssd_index_lock
);
4333 mtip_hw_shutdown(dd
);
4337 static int mtip_block_suspend(struct driver_data
*dd
)
4339 dev_info(&dd
->pdev
->dev
,
4340 "Suspending %s ...\n", dd
->disk
->disk_name
);
4341 mtip_hw_suspend(dd
);
4345 static int mtip_block_resume(struct driver_data
*dd
)
4347 dev_info(&dd
->pdev
->dev
, "Resuming %s ...\n",
4348 dd
->disk
->disk_name
);
4353 static void drop_cpu(int cpu
)
4358 static int get_least_used_cpu_on_node(int node
)
4360 int cpu
, least_used_cpu
, least_cnt
;
4361 const struct cpumask
*node_mask
;
4363 node_mask
= cpumask_of_node(node
);
4364 least_used_cpu
= cpumask_first(node_mask
);
4365 least_cnt
= cpu_use
[least_used_cpu
];
4366 cpu
= least_used_cpu
;
4368 for_each_cpu(cpu
, node_mask
) {
4369 if (cpu_use
[cpu
] < least_cnt
) {
4370 least_used_cpu
= cpu
;
4371 least_cnt
= cpu_use
[cpu
];
4374 cpu_use
[least_used_cpu
]++;
4375 return least_used_cpu
;
4378 /* Helper for selecting a node in round robin mode */
4379 static inline int mtip_get_next_rr_node(void)
4381 static int next_node
= -1;
4383 if (next_node
== -1) {
4384 next_node
= first_online_node
;
4388 next_node
= next_online_node(next_node
);
4389 if (next_node
== MAX_NUMNODES
)
4390 next_node
= first_online_node
;
4394 static DEFINE_HANDLER(0);
4395 static DEFINE_HANDLER(1);
4396 static DEFINE_HANDLER(2);
4397 static DEFINE_HANDLER(3);
4398 static DEFINE_HANDLER(4);
4399 static DEFINE_HANDLER(5);
4400 static DEFINE_HANDLER(6);
4401 static DEFINE_HANDLER(7);
4404 * Called for each supported PCI device detected.
4406 * This function allocates the private data structure, enables the
4407 * PCI device and then calls the block layer initialization function.
4410 * 0 on success else an error code.
4412 static int mtip_pci_probe(struct pci_dev
*pdev
,
4413 const struct pci_device_id
*ent
)
4416 struct driver_data
*dd
= NULL
;
4418 const struct cpumask
*node_mask
;
4419 int cpu
, i
= 0, j
= 0;
4420 int my_node
= NUMA_NO_NODE
;
4421 unsigned long flags
;
4423 /* Allocate memory for this devices private data. */
4424 my_node
= pcibus_to_node(pdev
->bus
);
4425 if (my_node
!= NUMA_NO_NODE
) {
4426 if (!node_online(my_node
))
4427 my_node
= mtip_get_next_rr_node();
4429 dev_info(&pdev
->dev
, "Kernel not reporting proximity, choosing a node\n");
4430 my_node
= mtip_get_next_rr_node();
4432 dev_info(&pdev
->dev
, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n",
4433 my_node
, pcibus_to_node(pdev
->bus
), dev_to_node(&pdev
->dev
),
4434 cpu_to_node(smp_processor_id()), smp_processor_id());
4436 dd
= kzalloc_node(sizeof(struct driver_data
), GFP_KERNEL
, my_node
);
4439 "Unable to allocate memory for driver data\n");
4443 /* Attach the private data to this PCI device. */
4444 pci_set_drvdata(pdev
, dd
);
4446 rv
= pcim_enable_device(pdev
);
4448 dev_err(&pdev
->dev
, "Unable to enable device\n");
4452 /* Map BAR5 to memory. */
4453 rv
= pcim_iomap_regions(pdev
, 1 << MTIP_ABAR
, MTIP_DRV_NAME
);
4455 dev_err(&pdev
->dev
, "Unable to map regions\n");
4459 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(64))) {
4460 rv
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
4463 rv
= pci_set_consistent_dma_mask(pdev
,
4466 dev_warn(&pdev
->dev
,
4467 "64-bit DMA enable failed\n");
4473 /* Copy the info we may need later into the private data structure. */
4474 dd
->major
= mtip_major
;
4475 dd
->instance
= instance
;
4477 dd
->numa_node
= my_node
;
4479 INIT_LIST_HEAD(&dd
->online_list
);
4480 INIT_LIST_HEAD(&dd
->remove_list
);
4482 memset(dd
->workq_name
, 0, 32);
4483 snprintf(dd
->workq_name
, 31, "mtipq%d", dd
->instance
);
4485 dd
->isr_workq
= create_workqueue(dd
->workq_name
);
4486 if (!dd
->isr_workq
) {
4487 dev_warn(&pdev
->dev
, "Can't create wq %d\n", dd
->instance
);
4489 goto block_initialize_err
;
4492 memset(cpu_list
, 0, sizeof(cpu_list
));
4494 node_mask
= cpumask_of_node(dd
->numa_node
);
4495 if (!cpumask_empty(node_mask
)) {
4496 for_each_cpu(cpu
, node_mask
)
4498 snprintf(&cpu_list
[j
], 256 - j
, "%d ", cpu
);
4499 j
= strlen(cpu_list
);
4502 dev_info(&pdev
->dev
, "Node %d on package %d has %d cpu(s): %s\n",
4504 topology_physical_package_id(cpumask_first(node_mask
)),
4505 nr_cpus_node(dd
->numa_node
),
4508 dev_dbg(&pdev
->dev
, "mtip32xx: node_mask empty\n");
4510 dd
->isr_binding
= get_least_used_cpu_on_node(dd
->numa_node
);
4511 dev_info(&pdev
->dev
, "Initial IRQ binding node:cpu %d:%d\n",
4512 cpu_to_node(dd
->isr_binding
), dd
->isr_binding
);
4514 /* first worker context always runs in ISR */
4515 dd
->work
[0].cpu_binding
= dd
->isr_binding
;
4516 dd
->work
[1].cpu_binding
= get_least_used_cpu_on_node(dd
->numa_node
);
4517 dd
->work
[2].cpu_binding
= get_least_used_cpu_on_node(dd
->numa_node
);
4518 dd
->work
[3].cpu_binding
= dd
->work
[0].cpu_binding
;
4519 dd
->work
[4].cpu_binding
= dd
->work
[1].cpu_binding
;
4520 dd
->work
[5].cpu_binding
= dd
->work
[2].cpu_binding
;
4521 dd
->work
[6].cpu_binding
= dd
->work
[2].cpu_binding
;
4522 dd
->work
[7].cpu_binding
= dd
->work
[1].cpu_binding
;
4524 /* Log the bindings */
4525 for_each_present_cpu(cpu
) {
4526 memset(cpu_list
, 0, sizeof(cpu_list
));
4527 for (i
= 0, j
= 0; i
< MTIP_MAX_SLOT_GROUPS
; i
++) {
4528 if (dd
->work
[i
].cpu_binding
== cpu
) {
4529 snprintf(&cpu_list
[j
], 256 - j
, "%d ", i
);
4530 j
= strlen(cpu_list
);
4534 dev_info(&pdev
->dev
, "CPU %d: WQs %s\n", cpu
, cpu_list
);
4537 INIT_WORK(&dd
->work
[0].work
, mtip_workq_sdbf0
);
4538 INIT_WORK(&dd
->work
[1].work
, mtip_workq_sdbf1
);
4539 INIT_WORK(&dd
->work
[2].work
, mtip_workq_sdbf2
);
4540 INIT_WORK(&dd
->work
[3].work
, mtip_workq_sdbf3
);
4541 INIT_WORK(&dd
->work
[4].work
, mtip_workq_sdbf4
);
4542 INIT_WORK(&dd
->work
[5].work
, mtip_workq_sdbf5
);
4543 INIT_WORK(&dd
->work
[6].work
, mtip_workq_sdbf6
);
4544 INIT_WORK(&dd
->work
[7].work
, mtip_workq_sdbf7
);
4546 pci_set_master(pdev
);
4547 rv
= pci_enable_msi(pdev
);
4549 dev_warn(&pdev
->dev
,
4550 "Unable to enable MSI interrupt.\n");
4551 goto block_initialize_err
;
4554 /* Initialize the block layer. */
4555 rv
= mtip_block_initialize(dd
);
4558 "Unable to initialize block layer\n");
4559 goto block_initialize_err
;
4563 * Increment the instance count so that each device has a unique
4567 if (rv
!= MTIP_FTL_REBUILD_MAGIC
)
4568 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
4570 rv
= 0; /* device in rebuild state, return 0 from probe */
4572 /* Add to online list even if in ftl rebuild */
4573 spin_lock_irqsave(&dev_lock
, flags
);
4574 list_add(&dd
->online_list
, &online_list
);
4575 spin_unlock_irqrestore(&dev_lock
, flags
);
4579 block_initialize_err
:
4580 pci_disable_msi(pdev
);
4581 if (dd
->isr_workq
) {
4582 flush_workqueue(dd
->isr_workq
);
4583 destroy_workqueue(dd
->isr_workq
);
4584 drop_cpu(dd
->work
[0].cpu_binding
);
4585 drop_cpu(dd
->work
[1].cpu_binding
);
4586 drop_cpu(dd
->work
[2].cpu_binding
);
4589 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4593 pci_set_drvdata(pdev
, NULL
);
4600 * Called for each probed device when the device is removed or the
4601 * driver is unloaded.
4606 static void mtip_pci_remove(struct pci_dev
*pdev
)
4608 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4609 unsigned long flags
, to
;
4611 set_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
);
4613 spin_lock_irqsave(&dev_lock
, flags
);
4614 list_del_init(&dd
->online_list
);
4615 list_add(&dd
->remove_list
, &removing_list
);
4616 spin_unlock_irqrestore(&dev_lock
, flags
);
4618 mtip_check_surprise_removal(pdev
);
4619 synchronize_irq(dd
->pdev
->irq
);
4621 /* Spin until workers are done */
4622 to
= jiffies
+ msecs_to_jiffies(4000);
4625 } while (atomic_read(&dd
->irq_workers_active
) != 0 &&
4626 time_before(jiffies
, to
));
4628 if (atomic_read(&dd
->irq_workers_active
) != 0) {
4629 dev_warn(&dd
->pdev
->dev
,
4630 "Completion workers still active!\n");
4632 /* Cleanup the outstanding commands */
4633 mtip_command_cleanup(dd
);
4635 /* Clean up the block layer. */
4636 mtip_block_remove(dd
);
4638 if (dd
->isr_workq
) {
4639 flush_workqueue(dd
->isr_workq
);
4640 destroy_workqueue(dd
->isr_workq
);
4641 drop_cpu(dd
->work
[0].cpu_binding
);
4642 drop_cpu(dd
->work
[1].cpu_binding
);
4643 drop_cpu(dd
->work
[2].cpu_binding
);
4646 pci_disable_msi(pdev
);
4648 spin_lock_irqsave(&dev_lock
, flags
);
4649 list_del_init(&dd
->remove_list
);
4650 spin_unlock_irqrestore(&dev_lock
, flags
);
4655 set_bit(MTIP_DDF_REMOVE_DONE_BIT
, &dd
->dd_flag
);
4657 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4658 pci_set_drvdata(pdev
, NULL
);
4664 * Called for each probed device when the device is suspended.
4670 static int mtip_pci_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
4673 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4677 "Driver private datastructure is NULL\n");
4681 set_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4683 /* Disable ports & interrupts then send standby immediate */
4684 rv
= mtip_block_suspend(dd
);
4687 "Failed to suspend controller\n");
4692 * Save the pci config space to pdev structure &
4693 * disable the device
4695 pci_save_state(pdev
);
4696 pci_disable_device(pdev
);
4698 /* Move to Low power state*/
4699 pci_set_power_state(pdev
, PCI_D3hot
);
4705 * Called for each probed device when the device is resumed.
4711 static int mtip_pci_resume(struct pci_dev
*pdev
)
4714 struct driver_data
*dd
;
4716 dd
= pci_get_drvdata(pdev
);
4719 "Driver private datastructure is NULL\n");
4723 /* Move the device to active State */
4724 pci_set_power_state(pdev
, PCI_D0
);
4726 /* Restore PCI configuration space */
4727 pci_restore_state(pdev
);
4729 /* Enable the PCI device*/
4730 rv
= pcim_enable_device(pdev
);
4733 "Failed to enable card during resume\n");
4736 pci_set_master(pdev
);
4739 * Calls hbaReset, initPort, & startPort function
4740 * then enables interrupts
4742 rv
= mtip_block_resume(dd
);
4744 dev_err(&pdev
->dev
, "Unable to resume\n");
4747 clear_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4758 static void mtip_pci_shutdown(struct pci_dev
*pdev
)
4760 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4762 mtip_block_shutdown(dd
);
4765 /* Table of device ids supported by this driver. */
4766 static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl
) = {
4767 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320H_DEVICE_ID
) },
4768 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320M_DEVICE_ID
) },
4769 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320S_DEVICE_ID
) },
4770 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P325M_DEVICE_ID
) },
4771 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P420H_DEVICE_ID
) },
4772 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P420M_DEVICE_ID
) },
4773 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P425M_DEVICE_ID
) },
4777 /* Structure that describes the PCI driver functions. */
4778 static struct pci_driver mtip_pci_driver
= {
4779 .name
= MTIP_DRV_NAME
,
4780 .id_table
= mtip_pci_tbl
,
4781 .probe
= mtip_pci_probe
,
4782 .remove
= mtip_pci_remove
,
4783 .suspend
= mtip_pci_suspend
,
4784 .resume
= mtip_pci_resume
,
4785 .shutdown
= mtip_pci_shutdown
,
4788 MODULE_DEVICE_TABLE(pci
, mtip_pci_tbl
);
4791 * Module initialization function.
4793 * Called once when the module is loaded. This function allocates a major
4794 * block device number to the Cyclone devices and registers the PCI layer
4798 * 0 on success else error code.
4800 static int __init
mtip_init(void)
4804 pr_info(MTIP_DRV_NAME
" Version " MTIP_DRV_VERSION
"\n");
4806 spin_lock_init(&dev_lock
);
4808 INIT_LIST_HEAD(&online_list
);
4809 INIT_LIST_HEAD(&removing_list
);
4811 /* Allocate a major block device number to use with this driver. */
4812 error
= register_blkdev(0, MTIP_DRV_NAME
);
4814 pr_err("Unable to register block device (%d)\n",
4820 dfs_parent
= debugfs_create_dir("rssd", NULL
);
4821 if (IS_ERR_OR_NULL(dfs_parent
)) {
4822 pr_warn("Error creating debugfs parent\n");
4826 dfs_device_status
= debugfs_create_file("device_status",
4827 S_IRUGO
, dfs_parent
, NULL
,
4828 &mtip_device_status_fops
);
4829 if (IS_ERR_OR_NULL(dfs_device_status
)) {
4830 pr_err("Error creating device_status node\n");
4831 dfs_device_status
= NULL
;
4835 /* Register our PCI operations. */
4836 error
= pci_register_driver(&mtip_pci_driver
);
4838 debugfs_remove(dfs_parent
);
4839 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4846 * Module de-initialization function.
4848 * Called once when the module is unloaded. This function deallocates
4849 * the major block device number allocated by mtip_init() and
4850 * unregisters the PCI layer of the driver.
4855 static void __exit
mtip_exit(void)
4857 debugfs_remove_recursive(dfs_parent
);
4859 /* Release the allocated major block device number. */
4860 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4862 /* Unregister the PCI driver. */
4863 pci_unregister_driver(&mtip_pci_driver
);
4866 MODULE_AUTHOR("Micron Technology, Inc");
4867 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
4868 MODULE_LICENSE("GPL");
4869 MODULE_VERSION(MTIP_DRV_VERSION
);
4871 module_init(mtip_init
);
4872 module_exit(mtip_exit
);