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 <../drivers/ata/ahci.h>
40 #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
41 #define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16))
42 #define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS)
43 #define HW_PORT_PRIV_DMA_SZ \
44 (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ)
46 #define HOST_HSORG 0xFC
47 #define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
48 #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
49 #define HSORG_HWREV 0xFF00
50 #define HSORG_STYLE 0x8
51 #define HSORG_SLOTGROUPS 0x7
53 #define PORT_COMMAND_ISSUE 0x38
54 #define PORT_SDBV 0x7C
56 #define PORT_OFFSET 0x100
57 #define PORT_MEM_SIZE 0x80
59 #define PORT_IRQ_ERR \
60 (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
61 PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
62 PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
64 #define PORT_IRQ_LEGACY \
65 (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
66 #define PORT_IRQ_HANDLED \
67 (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
68 PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
69 PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
70 #define DEF_PORT_IRQ \
71 (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
74 #define MTIP_PRODUCT_UNKNOWN 0x00
75 #define MTIP_PRODUCT_ASICFPGA 0x11
77 /* Device instance number, incremented each time a device is probed. */
81 * Global variable used to hold the major block device number
82 * allocated in mtip_init().
84 static int mtip_major
;
86 static DEFINE_SPINLOCK(rssd_index_lock
);
87 static DEFINE_IDA(rssd_index_ida
);
90 struct mtip_compat_ide_task_request_s
{
93 ide_reg_valid_t out_flags
;
94 ide_reg_valid_t in_flags
;
97 compat_ulong_t out_size
;
98 compat_ulong_t in_size
;
102 static int mtip_exec_internal_command(struct mtip_port
*port
,
109 unsigned long timeout
);
112 * This function check_for_surprise_removal is called
113 * while card is removed from the system and it will
114 * read the vendor id from the configration space
116 * @pdev Pointer to the pci_dev structure.
119 * true if device removed, else false
121 static bool mtip_check_surprise_removal(struct pci_dev
*pdev
)
125 /* Read the vendorID from the configuration space */
126 pci_read_config_word(pdev
, 0x00, &vendor_id
);
127 if (vendor_id
== 0xFFFF)
128 return true; /* device removed */
130 return false; /* device present */
134 * This function is called for clean the pending command in the
135 * command slot during the surprise removal of device and return
136 * error to the upper layer.
138 * @dd Pointer to the DRIVER_DATA structure.
143 static void mtip_command_cleanup(struct driver_data
*dd
)
145 int group
= 0, commandslot
= 0, commandindex
= 0;
146 struct mtip_cmd
*command
;
147 struct mtip_port
*port
= dd
->port
;
149 for (group
= 0; group
< 4; group
++) {
150 for (commandslot
= 0; commandslot
< 32; commandslot
++) {
151 if (!(port
->allocated
[group
] & (1 << commandslot
)))
154 commandindex
= group
<< 5 | commandslot
;
155 command
= &port
->commands
[commandindex
];
157 if (atomic_read(&command
->active
)
158 && (command
->async_callback
)) {
159 command
->async_callback(command
->async_data
,
161 command
->async_callback
= NULL
;
162 command
->async_data
= NULL
;
165 dma_unmap_sg(&port
->dd
->pdev
->dev
,
167 command
->scatter_ents
,
174 atomic_set(&dd
->drv_cleanup_done
, true);
178 * Obtain an empty command slot.
180 * This function needs to be reentrant since it could be called
181 * at the same time on multiple CPUs. The allocation of the
182 * command slot must be atomic.
184 * @port Pointer to the port data structure.
187 * >= 0 Index of command slot obtained.
188 * -1 No command slots available.
190 static int get_slot(struct mtip_port
*port
)
193 unsigned int num_command_slots
= port
->dd
->slot_groups
* 32;
196 * Try 10 times, because there is a small race here.
197 * that's ok, because it's still cheaper than a lock.
199 * Race: Since this section is not protected by lock, same bit
200 * could be chosen by different process contexts running in
201 * different processor. So instead of costly lock, we are going
204 for (i
= 0; i
< 10; i
++) {
205 slot
= find_next_zero_bit(port
->allocated
,
206 num_command_slots
, 1);
207 if ((slot
< num_command_slots
) &&
208 (!test_and_set_bit(slot
, port
->allocated
)))
211 dev_warn(&port
->dd
->pdev
->dev
, "Failed to get a tag.\n");
213 if (mtip_check_surprise_removal(port
->dd
->pdev
)) {
214 /* Device not present, clean outstanding commands */
215 mtip_command_cleanup(port
->dd
);
221 * Release a command slot.
223 * @port Pointer to the port data structure.
224 * @tag Tag of command to release
229 static inline void release_slot(struct mtip_port
*port
, int tag
)
231 smp_mb__before_clear_bit();
232 clear_bit(tag
, port
->allocated
);
233 smp_mb__after_clear_bit();
237 * Reset the HBA (without sleeping)
239 * Just like hba_reset, except does not call sleep, so can be
240 * run from interrupt/tasklet context.
242 * @dd Pointer to the driver data structure.
245 * 0 The reset was successful.
246 * -1 The HBA Reset bit did not clear.
248 static int hba_reset_nosleep(struct driver_data
*dd
)
250 unsigned long timeout
;
252 /* Chip quirk: quiesce any chip function */
255 /* Set the reset bit */
256 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
259 readl(dd
->mmio
+ HOST_CTL
);
262 * Wait 10ms then spin for up to 1 second
263 * waiting for reset acknowledgement
265 timeout
= jiffies
+ msecs_to_jiffies(1000);
267 while ((readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
268 && time_before(jiffies
, timeout
))
271 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
278 * Issue a command to the hardware.
280 * Set the appropriate bit in the s_active and Command Issue hardware
281 * registers, causing hardware command processing to begin.
283 * @port Pointer to the port structure.
284 * @tag The tag of the command to be issued.
289 static inline void mtip_issue_ncq_command(struct mtip_port
*port
, int tag
)
291 unsigned long flags
= 0;
293 atomic_set(&port
->commands
[tag
].active
, 1);
295 spin_lock_irqsave(&port
->cmd_issue_lock
, flags
);
297 writel((1 << MTIP_TAG_BIT(tag
)),
298 port
->s_active
[MTIP_TAG_INDEX(tag
)]);
299 writel((1 << MTIP_TAG_BIT(tag
)),
300 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
302 spin_unlock_irqrestore(&port
->cmd_issue_lock
, flags
);
306 * Enable/disable the reception of FIS
308 * @port Pointer to the port data structure
309 * @enable 1 to enable, 0 to disable
312 * Previous state: 1 enabled, 0 disabled
314 static int mtip_enable_fis(struct mtip_port
*port
, int enable
)
318 /* enable FIS reception */
319 tmp
= readl(port
->mmio
+ PORT_CMD
);
321 writel(tmp
| PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
323 writel(tmp
& ~PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
326 readl(port
->mmio
+ PORT_CMD
);
328 return (((tmp
& PORT_CMD_FIS_RX
) == PORT_CMD_FIS_RX
));
332 * Enable/disable the DMA engine
334 * @port Pointer to the port data structure
335 * @enable 1 to enable, 0 to disable
338 * Previous state: 1 enabled, 0 disabled.
340 static int mtip_enable_engine(struct mtip_port
*port
, int enable
)
344 /* enable FIS reception */
345 tmp
= readl(port
->mmio
+ PORT_CMD
);
347 writel(tmp
| PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
349 writel(tmp
& ~PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
351 readl(port
->mmio
+ PORT_CMD
);
352 return (((tmp
& PORT_CMD_START
) == PORT_CMD_START
));
356 * Enables the port DMA engine and FIS reception.
361 static inline void mtip_start_port(struct mtip_port
*port
)
363 /* Enable FIS reception */
364 mtip_enable_fis(port
, 1);
366 /* Enable the DMA engine */
367 mtip_enable_engine(port
, 1);
371 * Deinitialize a port by disabling port interrupts, the DMA engine,
374 * @port Pointer to the port structure
379 static inline void mtip_deinit_port(struct mtip_port
*port
)
381 /* Disable interrupts on this port */
382 writel(0, port
->mmio
+ PORT_IRQ_MASK
);
384 /* Disable the DMA engine */
385 mtip_enable_engine(port
, 0);
387 /* Disable FIS reception */
388 mtip_enable_fis(port
, 0);
394 * This function deinitializes the port by calling mtip_deinit_port() and
395 * then initializes it by setting the command header and RX FIS addresses,
396 * clearing the SError register and any pending port interrupts before
397 * re-enabling the default set of port interrupts.
399 * @port Pointer to the port structure.
404 static void mtip_init_port(struct mtip_port
*port
)
407 mtip_deinit_port(port
);
409 /* Program the command list base and FIS base addresses */
410 if (readl(port
->dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
) {
411 writel((port
->command_list_dma
>> 16) >> 16,
412 port
->mmio
+ PORT_LST_ADDR_HI
);
413 writel((port
->rxfis_dma
>> 16) >> 16,
414 port
->mmio
+ PORT_FIS_ADDR_HI
);
417 writel(port
->command_list_dma
& 0xffffffff,
418 port
->mmio
+ PORT_LST_ADDR
);
419 writel(port
->rxfis_dma
& 0xffffffff, port
->mmio
+ PORT_FIS_ADDR
);
422 writel(readl(port
->mmio
+ PORT_SCR_ERR
), port
->mmio
+ PORT_SCR_ERR
);
424 /* reset the completed registers.*/
425 for (i
= 0; i
< port
->dd
->slot_groups
; i
++)
426 writel(0xFFFFFFFF, port
->completed
[i
]);
428 /* Clear any pending interrupts for this port */
429 writel(readl(port
->mmio
+ PORT_IRQ_STAT
), port
->mmio
+ PORT_IRQ_STAT
);
431 /* Enable port interrupts */
432 writel(DEF_PORT_IRQ
, port
->mmio
+ PORT_IRQ_MASK
);
438 * @port Pointer to the port data structure.
443 static void mtip_restart_port(struct mtip_port
*port
)
445 unsigned long timeout
;
447 /* Disable the DMA engine */
448 mtip_enable_engine(port
, 0);
450 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
451 timeout
= jiffies
+ msecs_to_jiffies(500);
452 while ((readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
)
453 && time_before(jiffies
, timeout
))
457 * Chip quirk: escalate to hba reset if
458 * PxCMD.CR not clear after 500 ms
460 if (readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
) {
461 dev_warn(&port
->dd
->pdev
->dev
,
462 "PxCMD.CR not clear, escalating reset\n");
464 if (hba_reset_nosleep(port
->dd
))
465 dev_err(&port
->dd
->pdev
->dev
,
466 "HBA reset escalation failed.\n");
468 /* 30 ms delay before com reset to quiesce chip */
472 dev_warn(&port
->dd
->pdev
->dev
, "Issuing COM reset\n");
475 writel(readl(port
->mmio
+ PORT_SCR_CTL
) |
476 1, port
->mmio
+ PORT_SCR_CTL
);
477 readl(port
->mmio
+ PORT_SCR_CTL
);
479 /* Wait 1 ms to quiesce chip function */
480 timeout
= jiffies
+ msecs_to_jiffies(1);
481 while (time_before(jiffies
, timeout
))
484 /* Clear PxSCTL.DET */
485 writel(readl(port
->mmio
+ PORT_SCR_CTL
) & ~1,
486 port
->mmio
+ PORT_SCR_CTL
);
487 readl(port
->mmio
+ PORT_SCR_CTL
);
489 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
490 timeout
= jiffies
+ msecs_to_jiffies(500);
491 while (((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
492 && time_before(jiffies
, timeout
))
495 if ((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
496 dev_warn(&port
->dd
->pdev
->dev
,
497 "COM reset failed\n");
499 /* Clear SError, the PxSERR.DIAG.x should be set so clear it */
500 writel(readl(port
->mmio
+ PORT_SCR_ERR
), port
->mmio
+ PORT_SCR_ERR
);
502 /* Enable the DMA engine */
503 mtip_enable_engine(port
, 1);
507 * Called periodically to see if any read/write commands are
508 * taking too long to complete.
510 * @data Pointer to the PORT data structure.
515 static void mtip_timeout_function(unsigned long int data
)
517 struct mtip_port
*port
= (struct mtip_port
*) data
;
518 struct host_to_dev_fis
*fis
;
519 struct mtip_cmd
*command
;
520 int tag
, cmdto_cnt
= 0;
521 unsigned int bit
, group
;
522 unsigned int num_command_slots
= port
->dd
->slot_groups
* 32;
527 if (atomic_read(&port
->dd
->resumeflag
) == true) {
528 mod_timer(&port
->cmd_timer
,
529 jiffies
+ msecs_to_jiffies(30000));
533 for (tag
= 0; tag
< num_command_slots
; tag
++) {
535 * Skip internal command slot as it has
536 * its own timeout mechanism
538 if (tag
== MTIP_TAG_INTERNAL
)
541 if (atomic_read(&port
->commands
[tag
].active
) &&
542 (time_after(jiffies
, port
->commands
[tag
].comp_time
))) {
546 command
= &port
->commands
[tag
];
547 fis
= (struct host_to_dev_fis
*) command
->command
;
549 dev_warn(&port
->dd
->pdev
->dev
,
550 "Timeout for command tag %d\n", tag
);
554 atomic_inc(&port
->dd
->eh_active
);
557 * Clear the completed bit. This should prevent
558 * any interrupt handlers from trying to retire
561 writel(1 << bit
, port
->completed
[group
]);
563 /* Call the async completion callback. */
564 if (likely(command
->async_callback
))
565 command
->async_callback(command
->async_data
,
567 command
->async_callback
= NULL
;
568 command
->comp_func
= NULL
;
570 /* Unmap the DMA scatter list entries */
571 dma_unmap_sg(&port
->dd
->pdev
->dev
,
573 command
->scatter_ents
,
577 * Clear the allocated bit and active tag for the
580 atomic_set(&port
->commands
[tag
].active
, 0);
581 release_slot(port
, tag
);
588 dev_warn(&port
->dd
->pdev
->dev
,
589 "%d commands timed out: restarting port",
591 mtip_restart_port(port
);
592 atomic_dec(&port
->dd
->eh_active
);
595 /* Restart the timer */
596 mod_timer(&port
->cmd_timer
,
597 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
601 * IO completion function.
603 * This completion function is called by the driver ISR when a
604 * command that was issued by the kernel completes. It first calls the
605 * asynchronous completion function which normally calls back into the block
606 * layer passing the asynchronous callback data, then unmaps the
607 * scatter list associated with the completed command, and finally
608 * clears the allocated bit associated with the completed command.
610 * @port Pointer to the port data structure.
611 * @tag Tag of the command.
612 * @data Pointer to driver_data.
613 * @status Completion status.
618 static void mtip_async_complete(struct mtip_port
*port
,
623 struct mtip_cmd
*command
;
624 struct driver_data
*dd
= data
;
625 int cb_status
= status
? -EIO
: 0;
627 if (unlikely(!dd
) || unlikely(!port
))
630 command
= &port
->commands
[tag
];
632 if (unlikely(status
== PORT_IRQ_TF_ERR
)) {
633 dev_warn(&port
->dd
->pdev
->dev
,
634 "Command tag %d failed due to TFE\n", tag
);
637 /* Upper layer callback */
638 if (likely(command
->async_callback
))
639 command
->async_callback(command
->async_data
, cb_status
);
641 command
->async_callback
= NULL
;
642 command
->comp_func
= NULL
;
644 /* Unmap the DMA scatter list entries */
645 dma_unmap_sg(&dd
->pdev
->dev
,
647 command
->scatter_ents
,
650 /* Clear the allocated and active bits for the command */
651 atomic_set(&port
->commands
[tag
].active
, 0);
652 release_slot(port
, tag
);
658 * Internal command completion callback function.
660 * This function is normally called by the driver ISR when an internal
661 * command completed. This function signals the command completion by
662 * calling complete().
664 * @port Pointer to the port data structure.
665 * @tag Tag of the command that has completed.
666 * @data Pointer to a completion structure.
667 * @status Completion status.
672 static void mtip_completion(struct mtip_port
*port
,
677 struct mtip_cmd
*command
= &port
->commands
[tag
];
678 struct completion
*waiting
= data
;
679 if (unlikely(status
== PORT_IRQ_TF_ERR
))
680 dev_warn(&port
->dd
->pdev
->dev
,
681 "Internal command %d completed with TFE\n", tag
);
683 command
->async_callback
= NULL
;
684 command
->comp_func
= NULL
;
690 * Helper function for tag logging
692 static void print_tags(struct driver_data
*dd
,
694 unsigned long *tagbits
)
696 unsigned int tag
, count
= 0;
698 for (tag
= 0; tag
< (dd
->slot_groups
) * 32; tag
++) {
699 if (test_bit(tag
, tagbits
))
703 dev_info(&dd
->pdev
->dev
, "%s [%i tags]\n", msg
, count
);
709 * @dd Pointer to the DRIVER_DATA structure.
714 static void mtip_handle_tfe(struct driver_data
*dd
)
716 int group
, tag
, bit
, reissue
;
717 struct mtip_port
*port
;
718 struct mtip_cmd
*command
;
720 struct host_to_dev_fis
*fis
;
721 unsigned long tagaccum
[SLOTBITS_IN_LONGS
];
723 dev_warn(&dd
->pdev
->dev
, "Taskfile error\n");
727 /* Stop the timer to prevent command timeouts. */
728 del_timer(&port
->cmd_timer
);
731 atomic_inc(&dd
->eh_active
);
733 /* Loop through all the groups */
734 for (group
= 0; group
< dd
->slot_groups
; group
++) {
735 completed
= readl(port
->completed
[group
]);
737 /* clear completed status register in the hardware.*/
738 writel(completed
, port
->completed
[group
]);
740 /* clear the tag accumulator */
741 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
743 /* Process successfully completed commands */
744 for (bit
= 0; bit
< 32 && completed
; bit
++) {
745 if (!(completed
& (1<<bit
)))
747 tag
= (group
<< 5) + bit
;
749 /* Skip the internal command slot */
750 if (tag
== MTIP_TAG_INTERNAL
)
753 command
= &port
->commands
[tag
];
754 if (likely(command
->comp_func
)) {
755 set_bit(tag
, tagaccum
);
756 atomic_set(&port
->commands
[tag
].active
, 0);
757 command
->comp_func(port
,
762 dev_err(&port
->dd
->pdev
->dev
,
763 "Missing completion func for tag %d",
765 if (mtip_check_surprise_removal(dd
->pdev
)) {
766 mtip_command_cleanup(dd
);
767 /* don't proceed further */
773 print_tags(dd
, "TFE tags completed:", tagaccum
);
775 /* Restart the port */
777 mtip_restart_port(port
);
779 /* clear the tag accumulator */
780 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
782 /* Loop through all the groups */
783 for (group
= 0; group
< dd
->slot_groups
; group
++) {
784 for (bit
= 0; bit
< 32; bit
++) {
786 tag
= (group
<< 5) + bit
;
788 /* If the active bit is set re-issue the command */
789 if (atomic_read(&port
->commands
[tag
].active
) == 0)
792 fis
= (struct host_to_dev_fis
*)
793 port
->commands
[tag
].command
;
795 /* Should re-issue? */
796 if (tag
== MTIP_TAG_INTERNAL
||
797 fis
->command
== ATA_CMD_SET_FEATURES
)
801 * First check if this command has
802 * exceeded its retries.
805 (port
->commands
[tag
].retries
-- > 0)) {
807 set_bit(tag
, tagaccum
);
809 /* Update the timeout value. */
810 port
->commands
[tag
].comp_time
=
811 jiffies
+ msecs_to_jiffies(
812 MTIP_NCQ_COMMAND_TIMEOUT_MS
);
813 /* Re-issue the command. */
814 mtip_issue_ncq_command(port
, tag
);
819 /* Retire a command that will not be reissued */
820 dev_warn(&port
->dd
->pdev
->dev
,
821 "retiring tag %d\n", tag
);
822 atomic_set(&port
->commands
[tag
].active
, 0);
824 if (port
->commands
[tag
].comp_func
)
825 port
->commands
[tag
].comp_func(
828 port
->commands
[tag
].comp_data
,
831 dev_warn(&port
->dd
->pdev
->dev
,
832 "Bad completion for tag %d\n",
836 print_tags(dd
, "TFE tags reissued:", tagaccum
);
838 /* Decrement eh_active */
839 atomic_dec(&dd
->eh_active
);
841 mod_timer(&port
->cmd_timer
,
842 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
846 * Handle a set device bits interrupt
848 static inline void mtip_process_sdbf(struct driver_data
*dd
)
850 struct mtip_port
*port
= dd
->port
;
853 struct mtip_cmd
*command
;
855 /* walk all bits in all slot groups */
856 for (group
= 0; group
< dd
->slot_groups
; group
++) {
857 completed
= readl(port
->completed
[group
]);
859 /* clear completed status register in the hardware.*/
860 writel(completed
, port
->completed
[group
]);
862 /* Process completed commands. */
864 (bit
< 32) && completed
;
865 bit
++, completed
>>= 1) {
866 if (completed
& 0x01) {
867 tag
= (group
<< 5) | bit
;
869 /* skip internal command slot. */
870 if (unlikely(tag
== MTIP_TAG_INTERNAL
))
873 command
= &port
->commands
[tag
];
875 /* make internal callback */
876 if (likely(command
->comp_func
)) {
883 dev_warn(&dd
->pdev
->dev
,
888 if (mtip_check_surprise_removal(
890 mtip_command_cleanup(dd
);
900 * Process legacy pio and d2h interrupts
902 static inline void mtip_process_legacy(struct driver_data
*dd
, u32 port_stat
)
904 struct mtip_port
*port
= dd
->port
;
905 struct mtip_cmd
*cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
907 if (port
->internal_cmd_in_progress
&&
909 !(readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
910 & (1 << MTIP_TAG_INTERNAL
))) {
911 if (cmd
->comp_func
) {
920 dev_warn(&dd
->pdev
->dev
, "IRQ status 0x%x ignored.\n", port_stat
);
926 * Demux and handle errors
928 static inline void mtip_process_errors(struct driver_data
*dd
, u32 port_stat
)
930 if (likely(port_stat
& (PORT_IRQ_TF_ERR
| PORT_IRQ_IF_ERR
)))
933 if (unlikely(port_stat
& PORT_IRQ_CONNECT
)) {
934 dev_warn(&dd
->pdev
->dev
,
935 "Clearing PxSERR.DIAG.x\n");
936 writel((1 << 26), dd
->port
->mmio
+ PORT_SCR_ERR
);
939 if (unlikely(port_stat
& PORT_IRQ_PHYRDY
)) {
940 dev_warn(&dd
->pdev
->dev
,
941 "Clearing PxSERR.DIAG.n\n");
942 writel((1 << 16), dd
->port
->mmio
+ PORT_SCR_ERR
);
945 if (unlikely(port_stat
& ~PORT_IRQ_HANDLED
)) {
946 dev_warn(&dd
->pdev
->dev
,
947 "Port stat errors %x unhandled\n",
948 (port_stat
& ~PORT_IRQ_HANDLED
));
952 static inline irqreturn_t
mtip_handle_irq(struct driver_data
*data
)
954 struct driver_data
*dd
= (struct driver_data
*) data
;
955 struct mtip_port
*port
= dd
->port
;
956 u32 hba_stat
, port_stat
;
959 hba_stat
= readl(dd
->mmio
+ HOST_IRQ_STAT
);
963 /* Acknowledge the interrupt status on the port.*/
964 port_stat
= readl(port
->mmio
+ PORT_IRQ_STAT
);
965 writel(port_stat
, port
->mmio
+ PORT_IRQ_STAT
);
967 /* Demux port status */
968 if (likely(port_stat
& PORT_IRQ_SDB_FIS
))
969 mtip_process_sdbf(dd
);
971 if (unlikely(port_stat
& PORT_IRQ_ERR
)) {
972 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
973 mtip_command_cleanup(dd
);
974 /* don't proceed further */
978 mtip_process_errors(dd
, port_stat
& PORT_IRQ_ERR
);
981 if (unlikely(port_stat
& PORT_IRQ_LEGACY
))
982 mtip_process_legacy(dd
, port_stat
& PORT_IRQ_LEGACY
);
985 /* acknowledge interrupt */
986 writel(hba_stat
, dd
->mmio
+ HOST_IRQ_STAT
);
992 * Wrapper for mtip_handle_irq
993 * (ignores return code)
995 static void mtip_tasklet(unsigned long data
)
997 mtip_handle_irq((struct driver_data
*) data
);
1001 * HBA interrupt subroutine.
1004 * @instance Pointer to the driver data structure.
1007 * IRQ_HANDLED A HBA interrupt was pending and handled.
1008 * IRQ_NONE This interrupt was not for the HBA.
1010 static irqreturn_t
mtip_irq_handler(int irq
, void *instance
)
1012 struct driver_data
*dd
= instance
;
1013 tasklet_schedule(&dd
->tasklet
);
1017 static void mtip_issue_non_ncq_command(struct mtip_port
*port
, int tag
)
1019 atomic_set(&port
->commands
[tag
].active
, 1);
1020 writel(1 << MTIP_TAG_BIT(tag
),
1021 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
1025 * Wait for port to quiesce
1027 * @port Pointer to port data structure
1028 * @timeout Max duration to wait (ms)
1032 * -EBUSY Commands still active
1034 static int mtip_quiesce_io(struct mtip_port
*port
, unsigned long timeout
)
1037 unsigned int n
, active
;
1039 to
= jiffies
+ msecs_to_jiffies(timeout
);
1042 * Ignore s_active bit 0 of array element 0.
1043 * This bit will always be set
1045 active
= readl(port
->s_active
[0]) & 0xfffffffe;
1046 for (n
= 1; n
< port
->dd
->slot_groups
; n
++)
1047 active
|= readl(port
->s_active
[n
]);
1053 } while (time_before(jiffies
, to
));
1055 return active
? -EBUSY
: 0;
1059 * Execute an internal command and wait for the completion.
1061 * @port Pointer to the port data structure.
1062 * @fis Pointer to the FIS that describes the command.
1063 * @fisLen Length in WORDS of the FIS.
1064 * @buffer DMA accessible for command data.
1065 * @bufLen Length, in bytes, of the data buffer.
1066 * @opts Command header options, excluding the FIS length
1067 * and the number of PRD entries.
1068 * @timeout Time in ms to wait for the command to complete.
1071 * 0 Command completed successfully.
1072 * -EFAULT The buffer address is not correctly aligned.
1073 * -EBUSY Internal command or other IO in progress.
1074 * -EAGAIN Time out waiting for command to complete.
1076 static int mtip_exec_internal_command(struct mtip_port
*port
,
1083 unsigned long timeout
)
1085 struct mtip_cmd_sg
*command_sg
;
1086 DECLARE_COMPLETION_ONSTACK(wait
);
1088 struct mtip_cmd
*int_cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
1090 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
1091 if (buffer
& 0x00000007) {
1092 dev_err(&port
->dd
->pdev
->dev
,
1093 "SG buffer is not 8 byte aligned\n");
1097 /* Only one internal command should be running at a time */
1098 if (test_and_set_bit(MTIP_TAG_INTERNAL
, port
->allocated
)) {
1099 dev_warn(&port
->dd
->pdev
->dev
,
1100 "Internal command already active\n");
1103 port
->internal_cmd_in_progress
= 1;
1105 if (atomic
== GFP_KERNEL
) {
1106 /* wait for io to complete if non atomic */
1107 if (mtip_quiesce_io(port
, 5000) < 0) {
1108 dev_warn(&port
->dd
->pdev
->dev
,
1109 "Failed to quiesce IO\n");
1110 release_slot(port
, MTIP_TAG_INTERNAL
);
1111 port
->internal_cmd_in_progress
= 0;
1115 /* Set the completion function and data for the command. */
1116 int_cmd
->comp_data
= &wait
;
1117 int_cmd
->comp_func
= mtip_completion
;
1120 /* Clear completion - we're going to poll */
1121 int_cmd
->comp_data
= NULL
;
1122 int_cmd
->comp_func
= NULL
;
1125 /* Copy the command to the command table */
1126 memcpy(int_cmd
->command
, fis
, fisLen
*4);
1128 /* Populate the SG list */
1129 int_cmd
->command_header
->opts
=
1130 cpu_to_le32(opts
| fisLen
);
1132 command_sg
= int_cmd
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1134 command_sg
->info
= cpu_to_le32((bufLen
-1) & 0x3fffff);
1135 command_sg
->dba
= cpu_to_le32(buffer
& 0xffffffff);
1136 command_sg
->dba_upper
= cpu_to_le32((buffer
>> 16) >> 16);
1138 int_cmd
->command_header
->opts
|= cpu_to_le32((1 << 16));
1141 /* Populate the command header */
1142 int_cmd
->command_header
->byte_count
= 0;
1144 /* Issue the command to the hardware */
1145 mtip_issue_non_ncq_command(port
, MTIP_TAG_INTERNAL
);
1147 /* Poll if atomic, wait_for_completion otherwise */
1148 if (atomic
== GFP_KERNEL
) {
1149 /* Wait for the command to complete or timeout. */
1150 if (wait_for_completion_timeout(
1152 msecs_to_jiffies(timeout
)) == 0) {
1153 dev_err(&port
->dd
->pdev
->dev
,
1154 "Internal command did not complete [%d]\n",
1159 if (readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1160 & (1 << MTIP_TAG_INTERNAL
)) {
1161 dev_warn(&port
->dd
->pdev
->dev
,
1162 "Retiring internal command but CI is 1.\n");
1166 /* Spin for <timeout> checking if command still outstanding */
1167 timeout
= jiffies
+ msecs_to_jiffies(timeout
);
1170 port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1171 & (1 << MTIP_TAG_INTERNAL
))
1172 && time_before(jiffies
, timeout
))
1175 if (readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1176 & (1 << MTIP_TAG_INTERNAL
)) {
1177 dev_err(&port
->dd
->pdev
->dev
,
1178 "Internal command did not complete [%d]\n",
1184 /* Clear the allocated and active bits for the internal command. */
1185 atomic_set(&int_cmd
->active
, 0);
1186 release_slot(port
, MTIP_TAG_INTERNAL
);
1187 port
->internal_cmd_in_progress
= 0;
1193 * Byte-swap ATA ID strings.
1195 * ATA identify data contains strings in byte-swapped 16-bit words.
1196 * They must be swapped (on all architectures) to be usable as C strings.
1197 * This function swaps bytes in-place.
1199 * @buf The buffer location of the string
1200 * @len The number of bytes to swap
1205 static inline void ata_swap_string(u16
*buf
, unsigned int len
)
1208 for (i
= 0; i
< (len
/2); i
++)
1209 be16_to_cpus(&buf
[i
]);
1213 * Request the device identity information.
1215 * If a user space buffer is not specified, i.e. is NULL, the
1216 * identify information is still read from the drive and placed
1217 * into the identify data buffer (@e port->identify) in the
1218 * port data structure.
1219 * When the identify buffer contains valid identify information @e
1220 * port->identify_valid is non-zero.
1222 * @port Pointer to the port structure.
1223 * @user_buffer A user space buffer where the identify data should be
1227 * 0 Command completed successfully.
1228 * -EFAULT An error occurred while coping data to the user buffer.
1229 * -1 Command failed.
1231 static int mtip_get_identify(struct mtip_port
*port
, void __user
*user_buffer
)
1234 struct host_to_dev_fis fis
;
1236 down_write(&port
->dd
->internal_sem
);
1238 /* Build the FIS. */
1239 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1242 fis
.command
= ATA_CMD_ID_ATA
;
1244 /* Set the identify information as invalid. */
1245 port
->identify_valid
= 0;
1247 /* Clear the identify information. */
1248 memset(port
->identify
, 0, sizeof(u16
) * ATA_ID_WORDS
);
1250 /* Execute the command. */
1251 if (mtip_exec_internal_command(port
,
1255 sizeof(u16
) * ATA_ID_WORDS
,
1258 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
)
1265 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1266 * perform field-sensitive swapping on the string fields.
1267 * See the kernel use of ata_id_string() for proof of this.
1269 #ifdef __LITTLE_ENDIAN
1270 ata_swap_string(port
->identify
+ 27, 40); /* model string*/
1271 ata_swap_string(port
->identify
+ 23, 8); /* firmware string*/
1272 ata_swap_string(port
->identify
+ 10, 20); /* serial# string*/
1276 for (i
= 0; i
< ATA_ID_WORDS
; i
++)
1277 port
->identify
[i
] = le16_to_cpu(port
->identify
[i
]);
1281 /* Set the identify buffer as valid. */
1282 port
->identify_valid
= 1;
1288 ATA_ID_WORDS
* sizeof(u16
))) {
1295 up_write(&port
->dd
->internal_sem
);
1300 * Issue a standby immediate command to the device.
1302 * @port Pointer to the port structure.
1305 * 0 Command was executed successfully.
1306 * -1 An error occurred while executing the command.
1308 static int mtip_standby_immediate(struct mtip_port
*port
)
1311 struct host_to_dev_fis fis
;
1313 down_write(&port
->dd
->internal_sem
);
1315 /* Build the FIS. */
1316 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1319 fis
.command
= ATA_CMD_STANDBYNOW1
;
1321 /* Execute the command. Use a 15-second timeout for large drives. */
1322 rv
= mtip_exec_internal_command(port
,
1331 up_write(&port
->dd
->internal_sem
);
1337 * Get the drive capacity.
1339 * @dd Pointer to the device data structure.
1340 * @sectors Pointer to the variable that will receive the sector count.
1343 * 1 Capacity was returned successfully.
1344 * 0 The identify information is invalid.
1346 static bool mtip_hw_get_capacity(struct driver_data
*dd
, sector_t
*sectors
)
1348 struct mtip_port
*port
= dd
->port
;
1349 u64 total
, raw0
, raw1
, raw2
, raw3
;
1350 raw0
= port
->identify
[100];
1351 raw1
= port
->identify
[101];
1352 raw2
= port
->identify
[102];
1353 raw3
= port
->identify
[103];
1354 total
= raw0
| raw1
<<16 | raw2
<<32 | raw3
<<48;
1356 return (bool) !!port
->identify_valid
;
1362 * Resets the HBA by setting the HBA Reset bit in the Global
1363 * HBA Control register. After setting the HBA Reset bit the
1364 * function waits for 1 second before reading the HBA Reset
1365 * bit to make sure it has cleared. If HBA Reset is not clear
1366 * an error is returned. Cannot be used in non-blockable
1369 * @dd Pointer to the driver data structure.
1372 * 0 The reset was successful.
1373 * -1 The HBA Reset bit did not clear.
1375 static int mtip_hba_reset(struct driver_data
*dd
)
1377 mtip_deinit_port(dd
->port
);
1379 /* Set the reset bit */
1380 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
1383 readl(dd
->mmio
+ HOST_CTL
);
1385 /* Wait for reset to clear */
1388 /* Check the bit has cleared */
1389 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
) {
1390 dev_err(&dd
->pdev
->dev
,
1391 "Reset bit did not clear.\n");
1399 * Display the identify command data.
1401 * @port Pointer to the port data structure.
1406 static void mtip_dump_identify(struct mtip_port
*port
)
1409 unsigned short revid
;
1412 if (!port
->identify_valid
)
1415 strlcpy(cbuf
, (char *)(port
->identify
+10), 21);
1416 dev_info(&port
->dd
->pdev
->dev
,
1417 "Serial No.: %s\n", cbuf
);
1419 strlcpy(cbuf
, (char *)(port
->identify
+23), 9);
1420 dev_info(&port
->dd
->pdev
->dev
,
1421 "Firmware Ver.: %s\n", cbuf
);
1423 strlcpy(cbuf
, (char *)(port
->identify
+27), 41);
1424 dev_info(&port
->dd
->pdev
->dev
, "Model: %s\n", cbuf
);
1426 if (mtip_hw_get_capacity(port
->dd
, §ors
))
1427 dev_info(&port
->dd
->pdev
->dev
,
1428 "Capacity: %llu sectors (%llu MB)\n",
1430 ((u64
)sectors
) * ATA_SECT_SIZE
>> 20);
1432 pci_read_config_word(port
->dd
->pdev
, PCI_REVISION_ID
, &revid
);
1433 switch (revid
& 0xff) {
1435 strlcpy(cbuf
, "A0", 3);
1438 strlcpy(cbuf
, "A2", 3);
1441 strlcpy(cbuf
, "?", 2);
1444 dev_info(&port
->dd
->pdev
->dev
,
1445 "Card Type: %s\n", cbuf
);
1449 * Map the commands scatter list into the command table.
1451 * @command Pointer to the command.
1452 * @nents Number of scatter list entries.
1457 static inline void fill_command_sg(struct driver_data
*dd
,
1458 struct mtip_cmd
*command
,
1462 unsigned int dma_len
;
1463 struct mtip_cmd_sg
*command_sg
;
1464 struct scatterlist
*sg
= command
->sg
;
1466 command_sg
= command
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1468 for (n
= 0; n
< nents
; n
++) {
1469 dma_len
= sg_dma_len(sg
);
1470 if (dma_len
> 0x400000)
1471 dev_err(&dd
->pdev
->dev
,
1472 "DMA segment length truncated\n");
1473 command_sg
->info
= cpu_to_le32((dma_len
-1) & 0x3fffff);
1474 #if (BITS_PER_LONG == 64)
1475 *((unsigned long *) &command_sg
->dba
) =
1476 cpu_to_le64(sg_dma_address(sg
));
1478 command_sg
->dba
= cpu_to_le32(sg_dma_address(sg
));
1479 command_sg
->dba_upper
=
1480 cpu_to_le32((sg_dma_address(sg
) >> 16) >> 16);
1488 * @brief Execute a drive command.
1490 * return value 0 The command completed successfully.
1491 * return value -1 An error occurred while executing the command.
1493 static int exec_drive_task(struct mtip_port
*port
, u8
*command
)
1495 struct host_to_dev_fis fis
;
1496 struct host_to_dev_fis
*reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1498 /* Lock the internal command semaphore. */
1499 down_write(&port
->dd
->internal_sem
);
1501 /* Build the FIS. */
1502 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1505 fis
.command
= command
[0];
1506 fis
.features
= command
[1];
1507 fis
.sect_count
= command
[2];
1508 fis
.sector
= command
[3];
1509 fis
.cyl_low
= command
[4];
1510 fis
.cyl_hi
= command
[5];
1511 fis
.device
= command
[6] & ~0x10; /* Clear the dev bit*/
1514 dbg_printk(MTIP_DRV_NAME
"%s: User Command: cmd %x, feat %x, "
1515 "nsect %x, sect %x, lcyl %x, "
1516 "hcyl %x, sel %x\n",
1526 /* Execute the command. */
1527 if (mtip_exec_internal_command(port
,
1534 MTIP_IOCTL_COMMAND_TIMEOUT_MS
) < 0) {
1535 up_write(&port
->dd
->internal_sem
);
1539 command
[0] = reply
->command
; /* Status*/
1540 command
[1] = reply
->features
; /* Error*/
1541 command
[4] = reply
->cyl_low
;
1542 command
[5] = reply
->cyl_hi
;
1544 dbg_printk(MTIP_DRV_NAME
"%s: Completion Status: stat %x, "
1545 "err %x , cyl_lo %x cyl_hi %x\n",
1552 up_write(&port
->dd
->internal_sem
);
1557 * @brief Execute a drive command.
1559 * @param port Pointer to the port data structure.
1560 * @param command Pointer to the user specified command parameters.
1561 * @param user_buffer Pointer to the user space buffer where read sector
1562 * data should be copied.
1564 * return value 0 The command completed successfully.
1565 * return value -EFAULT An error occurred while copying the completion
1566 * data to the user space buffer.
1567 * return value -1 An error occurred while executing the command.
1569 static int exec_drive_command(struct mtip_port
*port
, u8
*command
,
1570 void __user
*user_buffer
)
1572 struct host_to_dev_fis fis
;
1573 struct host_to_dev_fis
*reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1575 /* Lock the internal command semaphore. */
1576 down_write(&port
->dd
->internal_sem
);
1578 /* Build the FIS. */
1579 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1582 fis
.command
= command
[0];
1583 fis
.features
= command
[2];
1584 fis
.sect_count
= command
[3];
1585 if (fis
.command
== ATA_CMD_SMART
) {
1586 fis
.sector
= command
[1];
1591 dbg_printk(MTIP_DRV_NAME
1592 "%s: User Command: cmd %x, sect %x, "
1593 "feat %x, sectcnt %x\n",
1600 memset(port
->sector_buffer
, 0x00, ATA_SECT_SIZE
);
1602 /* Execute the command. */
1603 if (mtip_exec_internal_command(port
,
1606 port
->sector_buffer_dma
,
1607 (command
[3] != 0) ? ATA_SECT_SIZE
: 0,
1610 MTIP_IOCTL_COMMAND_TIMEOUT_MS
)
1612 up_write(&port
->dd
->internal_sem
);
1616 /* Collect the completion status. */
1617 command
[0] = reply
->command
; /* Status*/
1618 command
[1] = reply
->features
; /* Error*/
1619 command
[2] = command
[3];
1621 dbg_printk(MTIP_DRV_NAME
1622 "%s: Completion Status: stat %x, "
1629 if (user_buffer
&& command
[3]) {
1630 if (copy_to_user(user_buffer
,
1631 port
->sector_buffer
,
1632 ATA_SECT_SIZE
* command
[3])) {
1633 up_write(&port
->dd
->internal_sem
);
1638 up_write(&port
->dd
->internal_sem
);
1643 * Indicates whether a command has a single sector payload.
1645 * @command passed to the device to perform the certain event.
1646 * @features passed to the device to perform the certain event.
1649 * 1 command is one that always has a single sector payload,
1650 * regardless of the value in the Sector Count field.
1654 static unsigned int implicit_sector(unsigned char command
,
1655 unsigned char features
)
1657 unsigned int rv
= 0;
1659 /* list of commands that have an implicit sector count of 1 */
1672 if (features
== 0x03)
1676 if ((features
== 0xD0) || (features
== 0xD1))
1680 if ((features
== 0xC2) || (features
== 0xC3))
1688 * Executes a taskfile
1689 * See ide_taskfile_ioctl() for derivation
1691 static int exec_drive_taskfile(struct driver_data
*dd
,
1693 ide_task_request_t
*req_task
,
1696 struct host_to_dev_fis fis
;
1697 struct host_to_dev_fis
*reply
;
1700 dma_addr_t outbuf_dma
= 0;
1701 dma_addr_t inbuf_dma
= 0;
1702 dma_addr_t dma_buffer
= 0;
1704 unsigned int taskin
= 0;
1705 unsigned int taskout
= 0;
1707 unsigned int timeout
= MTIP_IOCTL_COMMAND_TIMEOUT_MS
;
1708 unsigned int force_single_sector
;
1709 unsigned int transfer_size
;
1710 unsigned long task_file_data
;
1711 int intotal
= outtotal
+ req_task
->out_size
;
1713 taskout
= req_task
->out_size
;
1714 taskin
= req_task
->in_size
;
1715 /* 130560 = 512 * 0xFF*/
1716 if (taskin
> 130560 || taskout
> 130560) {
1722 outbuf
= kzalloc(taskout
, GFP_KERNEL
);
1723 if (outbuf
== NULL
) {
1727 if (copy_from_user(outbuf
, buf
+ outtotal
, taskout
)) {
1731 outbuf_dma
= pci_map_single(dd
->pdev
,
1735 if (outbuf_dma
== 0) {
1739 dma_buffer
= outbuf_dma
;
1743 inbuf
= kzalloc(taskin
, GFP_KERNEL
);
1744 if (inbuf
== NULL
) {
1749 if (copy_from_user(inbuf
, buf
+ intotal
, taskin
)) {
1753 inbuf_dma
= pci_map_single(dd
->pdev
,
1755 taskin
, DMA_FROM_DEVICE
);
1756 if (inbuf_dma
== 0) {
1760 dma_buffer
= inbuf_dma
;
1763 /* only supports PIO and non-data commands from this ioctl. */
1764 switch (req_task
->data_phase
) {
1766 nsect
= taskout
/ ATA_SECT_SIZE
;
1767 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
1770 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
1772 case TASKFILE_NO_DATA
:
1773 reply
= (dd
->port
->rxfis
+ RX_FIS_D2H_REG
);
1780 /* Lock the internal command semaphore. */
1781 down_write(&dd
->internal_sem
);
1783 /* Build the FIS. */
1784 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1788 fis
.command
= req_task
->io_ports
[7];
1789 fis
.features
= req_task
->io_ports
[1];
1790 fis
.sect_count
= req_task
->io_ports
[2];
1791 fis
.lba_low
= req_task
->io_ports
[3];
1792 fis
.lba_mid
= req_task
->io_ports
[4];
1793 fis
.lba_hi
= req_task
->io_ports
[5];
1794 /* Clear the dev bit*/
1795 fis
.device
= req_task
->io_ports
[6] & ~0x10;
1797 if ((req_task
->in_flags
.all
== 0) && (req_task
->out_flags
.all
& 1)) {
1798 req_task
->in_flags
.all
=
1799 IDE_TASKFILE_STD_IN_FLAGS
|
1800 (IDE_HOB_STD_IN_FLAGS
<< 8);
1801 fis
.lba_low_ex
= req_task
->hob_ports
[3];
1802 fis
.lba_mid_ex
= req_task
->hob_ports
[4];
1803 fis
.lba_hi_ex
= req_task
->hob_ports
[5];
1804 fis
.features_ex
= req_task
->hob_ports
[1];
1805 fis
.sect_cnt_ex
= req_task
->hob_ports
[2];
1808 req_task
->in_flags
.all
= IDE_TASKFILE_STD_IN_FLAGS
;
1811 force_single_sector
= implicit_sector(fis
.command
, fis
.features
);
1813 if ((taskin
|| taskout
) && (!fis
.sect_count
)) {
1815 fis
.sect_count
= nsect
;
1817 if (!force_single_sector
) {
1818 dev_warn(&dd
->pdev
->dev
,
1819 "data movement but "
1820 "sect_count is 0\n");
1821 up_write(&dd
->internal_sem
);
1828 dbg_printk(MTIP_DRV_NAME
1829 "taskfile: cmd %x, feat %x, nsect %x,"
1830 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
1840 switch (fis
.command
) {
1841 case 0x92: /* Change timeout for Download Microcode to 60 seconds.*/
1844 case 0xf4: /* Change timeout for Security Erase Unit to 4 minutes.*/
1847 case 0xe0: /* Change timeout for standby immediate to 10 seconds.*/
1850 case 0xf7: /* Change timeout for vendor unique command to 10 secs */
1853 case 0xfa: /* Change timeout for vendor unique command to 10 secs */
1857 timeout
= MTIP_IOCTL_COMMAND_TIMEOUT_MS
;
1861 /* Determine the correct transfer size.*/
1862 if (force_single_sector
)
1863 transfer_size
= ATA_SECT_SIZE
;
1865 transfer_size
= ATA_SECT_SIZE
* fis
.sect_count
;
1867 /* Execute the command.*/
1868 if (mtip_exec_internal_command(dd
->port
,
1876 up_write(&dd
->internal_sem
);
1881 task_file_data
= readl(dd
->port
->mmio
+PORT_TFDATA
);
1883 if ((req_task
->data_phase
== TASKFILE_IN
) && !(task_file_data
& 1)) {
1884 reply
= dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
;
1885 req_task
->io_ports
[7] = reply
->control
;
1887 reply
= dd
->port
->rxfis
+ RX_FIS_D2H_REG
;
1888 req_task
->io_ports
[7] = reply
->command
;
1891 /* reclaim the DMA buffers.*/
1893 pci_unmap_single(dd
->pdev
, inbuf_dma
,
1894 taskin
, DMA_FROM_DEVICE
);
1896 pci_unmap_single(dd
->pdev
, outbuf_dma
,
1897 taskout
, DMA_TO_DEVICE
);
1901 /* return the ATA registers to the caller.*/
1902 req_task
->io_ports
[1] = reply
->features
;
1903 req_task
->io_ports
[2] = reply
->sect_count
;
1904 req_task
->io_ports
[3] = reply
->lba_low
;
1905 req_task
->io_ports
[4] = reply
->lba_mid
;
1906 req_task
->io_ports
[5] = reply
->lba_hi
;
1907 req_task
->io_ports
[6] = reply
->device
;
1909 if (req_task
->out_flags
.all
& 1) {
1911 req_task
->hob_ports
[3] = reply
->lba_low_ex
;
1912 req_task
->hob_ports
[4] = reply
->lba_mid_ex
;
1913 req_task
->hob_ports
[5] = reply
->lba_hi_ex
;
1914 req_task
->hob_ports
[1] = reply
->features_ex
;
1915 req_task
->hob_ports
[2] = reply
->sect_cnt_ex
;
1918 /* Com rest after secure erase or lowlevel format */
1919 if (((fis
.command
== 0xF4) ||
1920 ((fis
.command
== 0xFC) &&
1921 (fis
.features
== 0x27 || fis
.features
== 0x72 ||
1922 fis
.features
== 0x62 || fis
.features
== 0x26))) &&
1923 !(reply
->command
& 1)) {
1924 mtip_restart_port(dd
->port
);
1927 dbg_printk(MTIP_DRV_NAME
1928 "%s: Completion: stat %x,"
1929 "err %x, sect_cnt %x, lbalo %x,"
1930 "lbamid %x, lbahi %x, dev %x\n",
1932 req_task
->io_ports
[7],
1933 req_task
->io_ports
[1],
1934 req_task
->io_ports
[2],
1935 req_task
->io_ports
[3],
1936 req_task
->io_ports
[4],
1937 req_task
->io_ports
[5],
1938 req_task
->io_ports
[6]);
1940 up_write(&dd
->internal_sem
);
1943 if (copy_to_user(buf
+ outtotal
, outbuf
, taskout
)) {
1949 if (copy_to_user(buf
+ intotal
, inbuf
, taskin
)) {
1956 pci_unmap_single(dd
->pdev
, inbuf_dma
,
1957 taskin
, DMA_FROM_DEVICE
);
1959 pci_unmap_single(dd
->pdev
, outbuf_dma
,
1960 taskout
, DMA_TO_DEVICE
);
1968 * Handle IOCTL calls from the Block Layer.
1970 * This function is called by the Block Layer when it receives an IOCTL
1971 * command that it does not understand. If the IOCTL command is not supported
1972 * this function returns -ENOTTY.
1974 * @dd Pointer to the driver data structure.
1975 * @cmd IOCTL command passed from the Block Layer.
1976 * @arg IOCTL argument passed from the Block Layer.
1979 * 0 The IOCTL completed successfully.
1980 * -ENOTTY The specified command is not supported.
1981 * -EFAULT An error occurred copying data to a user space buffer.
1982 * -EIO An error occurred while executing the command.
1984 static int mtip_hw_ioctl(struct driver_data
*dd
, unsigned int cmd
,
1988 case HDIO_GET_IDENTITY
:
1989 if (mtip_get_identify(dd
->port
, (void __user
*) arg
) < 0) {
1990 dev_warn(&dd
->pdev
->dev
,
1991 "Unable to read identity\n");
1996 case HDIO_DRIVE_CMD
:
1998 u8 drive_command
[4];
2000 /* Copy the user command info to our buffer. */
2001 if (copy_from_user(drive_command
,
2002 (void __user
*) arg
,
2003 sizeof(drive_command
)))
2006 /* Execute the drive command. */
2007 if (exec_drive_command(dd
->port
,
2009 (void __user
*) (arg
+4)))
2012 /* Copy the status back to the users buffer. */
2013 if (copy_to_user((void __user
*) arg
,
2015 sizeof(drive_command
)))
2020 case HDIO_DRIVE_TASK
:
2022 u8 drive_command
[7];
2024 /* Copy the user command info to our buffer. */
2025 if (copy_from_user(drive_command
,
2026 (void __user
*) arg
,
2027 sizeof(drive_command
)))
2030 /* Execute the drive command. */
2031 if (exec_drive_task(dd
->port
, drive_command
))
2034 /* Copy the status back to the users buffer. */
2035 if (copy_to_user((void __user
*) arg
,
2037 sizeof(drive_command
)))
2042 case HDIO_DRIVE_TASKFILE
: {
2043 ide_task_request_t req_task
;
2046 if (copy_from_user(&req_task
, (void __user
*) arg
,
2050 outtotal
= sizeof(req_task
);
2052 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
2053 &req_task
, outtotal
);
2055 if (copy_to_user((void __user
*) arg
, &req_task
, sizeof(req_task
)))
2068 * Submit an IO to the hw
2070 * This function is called by the block layer to issue an io
2071 * to the device. Upon completion, the callback function will
2072 * be called with the data parameter passed as the callback data.
2074 * @dd Pointer to the driver data structure.
2075 * @start First sector to read.
2076 * @nsect Number of sectors to read.
2077 * @nents Number of entries in scatter list for the read command.
2078 * @tag The tag of this read command.
2079 * @callback Pointer to the function that should be called
2080 * when the read completes.
2081 * @data Callback data passed to the callback function
2082 * when the read completes.
2083 * @barrier If non-zero, this command must be completed before
2084 * issuing any other commands.
2085 * @dir Direction (read or write)
2090 static void mtip_hw_submit_io(struct driver_data
*dd
, sector_t start
,
2091 int nsect
, int nents
, int tag
, void *callback
,
2092 void *data
, int barrier
, int dir
)
2094 struct host_to_dev_fis
*fis
;
2095 struct mtip_port
*port
= dd
->port
;
2096 struct mtip_cmd
*command
= &port
->commands
[tag
];
2098 /* Map the scatter list for DMA access */
2100 nents
= dma_map_sg(&dd
->pdev
->dev
, command
->sg
,
2101 nents
, DMA_FROM_DEVICE
);
2103 nents
= dma_map_sg(&dd
->pdev
->dev
, command
->sg
,
2104 nents
, DMA_TO_DEVICE
);
2106 command
->scatter_ents
= nents
;
2109 * The number of retries for this command before it is
2110 * reported as a failure to the upper layers.
2112 command
->retries
= MTIP_MAX_RETRIES
;
2115 fis
= command
->command
;
2119 (dir
== READ
? ATA_CMD_FPDMA_READ
: ATA_CMD_FPDMA_WRITE
);
2120 *((unsigned int *) &fis
->lba_low
) = (start
& 0xffffff);
2121 *((unsigned int *) &fis
->lba_low_ex
) = ((start
>> 24) & 0xffffff);
2122 fis
->device
= 1 << 6;
2124 fis
->device
|= FUA_BIT
;
2125 fis
->features
= nsect
& 0xff;
2126 fis
->features_ex
= (nsect
>> 8) & 0xff;
2127 fis
->sect_count
= ((tag
<< 3) | (tag
>> 5));
2128 fis
->sect_cnt_ex
= 0;
2132 fill_command_sg(dd
, command
, nents
);
2134 /* Populate the command header */
2135 command
->command_header
->opts
= cpu_to_le32(
2136 (nents
<< 16) | 5 | AHCI_CMD_PREFETCH
);
2137 command
->command_header
->byte_count
= 0;
2140 * Set the completion function and data for the command
2141 * within this layer.
2143 command
->comp_data
= dd
;
2144 command
->comp_func
= mtip_async_complete
;
2145 command
->direction
= (dir
== READ
? DMA_FROM_DEVICE
: DMA_TO_DEVICE
);
2148 * Set the completion function and data for the command passed
2149 * from the upper layer.
2151 command
->async_data
= data
;
2152 command
->async_callback
= callback
;
2155 * Lock used to prevent this command from being issued
2156 * if an internal command is in progress.
2158 down_read(&port
->dd
->internal_sem
);
2160 /* Issue the command to the hardware */
2161 mtip_issue_ncq_command(port
, tag
);
2163 /* Set the command's timeout value.*/
2164 port
->commands
[tag
].comp_time
= jiffies
+ msecs_to_jiffies(
2165 MTIP_NCQ_COMMAND_TIMEOUT_MS
);
2167 up_read(&port
->dd
->internal_sem
);
2171 * Release a command slot.
2173 * @dd Pointer to the driver data structure.
2179 static void mtip_hw_release_scatterlist(struct driver_data
*dd
, int tag
)
2181 release_slot(dd
->port
, tag
);
2185 * Obtain a command slot and return its associated scatter list.
2187 * @dd Pointer to the driver data structure.
2188 * @tag Pointer to an int that will receive the allocated command
2192 * Pointer to the scatter list for the allocated command slot
2193 * or NULL if no command slots are available.
2195 static struct scatterlist
*mtip_hw_get_scatterlist(struct driver_data
*dd
,
2199 * It is possible that, even with this semaphore, a thread
2200 * may think that no command slots are available. Therefore, we
2201 * need to make an attempt to get_slot().
2203 down(&dd
->port
->cmd_slot
);
2204 *tag
= get_slot(dd
->port
);
2206 if (unlikely(*tag
< 0))
2209 return dd
->port
->commands
[*tag
].sg
;
2213 * Sysfs register/status dump.
2215 * @dev Pointer to the device structure, passed by the kernrel.
2216 * @attr Pointer to the device_attribute structure passed by the kernel.
2217 * @buf Pointer to the char buffer that will receive the stats info.
2220 * The size, in bytes, of the data copied into buf.
2222 static ssize_t
hw_show_registers(struct device
*dev
,
2223 struct device_attribute
*attr
,
2226 u32 group_allocated
;
2227 struct driver_data
*dd
= dev_to_disk(dev
)->private_data
;
2231 size
+= sprintf(&buf
[size
], "%s:\ns_active:\n", __func__
);
2233 for (n
= 0; n
< dd
->slot_groups
; n
++)
2234 size
+= sprintf(&buf
[size
], "0x%08x\n",
2235 readl(dd
->port
->s_active
[n
]));
2237 size
+= sprintf(&buf
[size
], "Command Issue:\n");
2239 for (n
= 0; n
< dd
->slot_groups
; n
++)
2240 size
+= sprintf(&buf
[size
], "0x%08x\n",
2241 readl(dd
->port
->cmd_issue
[n
]));
2243 size
+= sprintf(&buf
[size
], "Allocated:\n");
2245 for (n
= 0; n
< dd
->slot_groups
; n
++) {
2246 if (sizeof(long) > sizeof(u32
))
2248 dd
->port
->allocated
[n
/2] >> (32*(n
&1));
2250 group_allocated
= dd
->port
->allocated
[n
];
2251 size
+= sprintf(&buf
[size
], "0x%08x\n",
2255 size
+= sprintf(&buf
[size
], "completed:\n");
2257 for (n
= 0; n
< dd
->slot_groups
; n
++)
2258 size
+= sprintf(&buf
[size
], "0x%08x\n",
2259 readl(dd
->port
->completed
[n
]));
2261 size
+= sprintf(&buf
[size
], "PORT_IRQ_STAT 0x%08x\n",
2262 readl(dd
->port
->mmio
+ PORT_IRQ_STAT
));
2263 size
+= sprintf(&buf
[size
], "HOST_IRQ_STAT 0x%08x\n",
2264 readl(dd
->mmio
+ HOST_IRQ_STAT
));
2268 static DEVICE_ATTR(registers
, S_IRUGO
, hw_show_registers
, NULL
);
2271 * Create the sysfs related attributes.
2273 * @dd Pointer to the driver data structure.
2274 * @kobj Pointer to the kobj for the block device.
2277 * 0 Operation completed successfully.
2278 * -EINVAL Invalid parameter.
2280 static int mtip_hw_sysfs_init(struct driver_data
*dd
, struct kobject
*kobj
)
2285 if (sysfs_create_file(kobj
, &dev_attr_registers
.attr
))
2286 dev_warn(&dd
->pdev
->dev
,
2287 "Error creating registers sysfs entry\n");
2292 * Remove the sysfs related attributes.
2294 * @dd Pointer to the driver data structure.
2295 * @kobj Pointer to the kobj for the block device.
2298 * 0 Operation completed successfully.
2299 * -EINVAL Invalid parameter.
2301 static int mtip_hw_sysfs_exit(struct driver_data
*dd
, struct kobject
*kobj
)
2306 sysfs_remove_file(kobj
, &dev_attr_registers
.attr
);
2312 * Perform any init/resume time hardware setup
2314 * @dd Pointer to the driver data structure.
2319 static inline void hba_setup(struct driver_data
*dd
)
2322 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2324 /* interrupt bug workaround: use only 1 IS bit.*/
2326 HSORG_DISABLE_SLOTGRP_INTR
|
2327 HSORG_DISABLE_SLOTGRP_PXIS
,
2328 dd
->mmio
+ HOST_HSORG
);
2332 * Detect the details of the product, and store anything needed
2333 * into the driver data structure. This includes product type and
2334 * version and number of slot groups.
2336 * @dd Pointer to the driver data structure.
2341 static void mtip_detect_product(struct driver_data
*dd
)
2344 unsigned int rev
, slotgroups
;
2347 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
2349 * [15:8] hardware/software interface rev#
2350 * [ 3] asic-style interface
2351 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
2353 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2355 dd
->product_type
= MTIP_PRODUCT_UNKNOWN
;
2356 dd
->slot_groups
= 1;
2359 dd
->product_type
= MTIP_PRODUCT_ASICFPGA
;
2360 rev
= (hwdata
& HSORG_HWREV
) >> 8;
2361 slotgroups
= (hwdata
& HSORG_SLOTGROUPS
) + 1;
2362 dev_info(&dd
->pdev
->dev
,
2363 "ASIC-FPGA design, HS rev 0x%x, "
2364 "%i slot groups [%i slots]\n",
2369 if (slotgroups
> MTIP_MAX_SLOT_GROUPS
) {
2370 dev_warn(&dd
->pdev
->dev
,
2371 "Warning: driver only supports "
2372 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS
);
2373 slotgroups
= MTIP_MAX_SLOT_GROUPS
;
2375 dd
->slot_groups
= slotgroups
;
2379 dev_warn(&dd
->pdev
->dev
, "Unrecognized product id\n");
2383 * Blocking wait for FTL rebuild to complete
2385 * @dd Pointer to the DRIVER_DATA structure.
2388 * 0 FTL rebuild completed successfully
2389 * -EFAULT FTL rebuild error/timeout/interruption
2391 static int mtip_ftl_rebuild_poll(struct driver_data
*dd
)
2393 unsigned long timeout
, cnt
= 0, start
;
2395 dev_warn(&dd
->pdev
->dev
,
2396 "FTL rebuild in progress. Polling for completion.\n");
2399 dd
->ftlrebuildflag
= 1;
2400 timeout
= jiffies
+ msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS
);
2403 #ifdef CONFIG_HOTPLUG
2404 if (mtip_check_surprise_removal(dd
->pdev
))
2407 if (mtip_get_identify(dd
->port
, NULL
) < 0)
2410 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
2411 MTIP_FTL_REBUILD_MAGIC
) {
2413 /* Print message every 3 minutes */
2415 dev_warn(&dd
->pdev
->dev
,
2416 "FTL rebuild in progress (%d secs).\n",
2417 jiffies_to_msecs(jiffies
- start
) / 1000);
2421 dev_warn(&dd
->pdev
->dev
,
2422 "FTL rebuild complete (%d secs).\n",
2423 jiffies_to_msecs(jiffies
- start
) / 1000);
2424 dd
->ftlrebuildflag
= 0;
2428 } while (time_before(jiffies
, timeout
));
2430 /* Check for timeout */
2431 if (dd
->ftlrebuildflag
) {
2432 dev_err(&dd
->pdev
->dev
,
2433 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
2434 jiffies_to_msecs(jiffies
- start
) / 1000);
2442 * Called once for each card.
2444 * @dd Pointer to the driver data structure.
2447 * 0 on success, else an error code.
2449 static int mtip_hw_init(struct driver_data
*dd
)
2453 unsigned int num_command_slots
;
2455 dd
->mmio
= pcim_iomap_table(dd
->pdev
)[MTIP_ABAR
];
2457 mtip_detect_product(dd
);
2458 if (dd
->product_type
== MTIP_PRODUCT_UNKNOWN
) {
2462 num_command_slots
= dd
->slot_groups
* 32;
2467 * Initialize the internal semaphore
2468 * Use a rw semaphore to enable prioritization of
2469 * mgmnt ioctl traffic during heavy IO load
2471 init_rwsem(&dd
->internal_sem
);
2473 tasklet_init(&dd
->tasklet
, mtip_tasklet
, (unsigned long)dd
);
2475 dd
->port
= kzalloc(sizeof(struct mtip_port
), GFP_KERNEL
);
2477 dev_err(&dd
->pdev
->dev
,
2478 "Memory allocation: port structure\n");
2482 /* Counting semaphore to track command slot usage */
2483 sema_init(&dd
->port
->cmd_slot
, num_command_slots
- 1);
2485 /* Spinlock to prevent concurrent issue */
2486 spin_lock_init(&dd
->port
->cmd_issue_lock
);
2488 /* Set the port mmio base address. */
2489 dd
->port
->mmio
= dd
->mmio
+ PORT_OFFSET
;
2492 /* Allocate memory for the command list. */
2493 dd
->port
->command_list
=
2494 dmam_alloc_coherent(&dd
->pdev
->dev
,
2495 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 2),
2496 &dd
->port
->command_list_dma
,
2498 if (!dd
->port
->command_list
) {
2499 dev_err(&dd
->pdev
->dev
,
2500 "Memory allocation: command list\n");
2505 /* Clear the memory we have allocated. */
2506 memset(dd
->port
->command_list
,
2508 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 2));
2510 /* Setup the addresse of the RX FIS. */
2511 dd
->port
->rxfis
= dd
->port
->command_list
+ HW_CMD_SLOT_SZ
;
2512 dd
->port
->rxfis_dma
= dd
->port
->command_list_dma
+ HW_CMD_SLOT_SZ
;
2514 /* Setup the address of the command tables. */
2515 dd
->port
->command_table
= dd
->port
->rxfis
+ AHCI_RX_FIS_SZ
;
2516 dd
->port
->command_tbl_dma
= dd
->port
->rxfis_dma
+ AHCI_RX_FIS_SZ
;
2518 /* Setup the address of the identify data. */
2519 dd
->port
->identify
= dd
->port
->command_table
+
2521 dd
->port
->identify_dma
= dd
->port
->command_tbl_dma
+
2524 /* Setup the address of the sector buffer. */
2525 dd
->port
->sector_buffer
= (void *) dd
->port
->identify
+ ATA_SECT_SIZE
;
2526 dd
->port
->sector_buffer_dma
= dd
->port
->identify_dma
+ ATA_SECT_SIZE
;
2528 /* Point the command headers at the command tables. */
2529 for (i
= 0; i
< num_command_slots
; i
++) {
2530 dd
->port
->commands
[i
].command_header
=
2531 dd
->port
->command_list
+
2532 (sizeof(struct mtip_cmd_hdr
) * i
);
2533 dd
->port
->commands
[i
].command_header_dma
=
2534 dd
->port
->command_list_dma
+
2535 (sizeof(struct mtip_cmd_hdr
) * i
);
2537 dd
->port
->commands
[i
].command
=
2538 dd
->port
->command_table
+ (HW_CMD_TBL_SZ
* i
);
2539 dd
->port
->commands
[i
].command_dma
=
2540 dd
->port
->command_tbl_dma
+ (HW_CMD_TBL_SZ
* i
);
2542 if (readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
)
2543 dd
->port
->commands
[i
].command_header
->ctbau
=
2545 (dd
->port
->commands
[i
].command_dma
>> 16) >> 16);
2546 dd
->port
->commands
[i
].command_header
->ctba
= cpu_to_le32(
2547 dd
->port
->commands
[i
].command_dma
& 0xffffffff);
2550 * If this is not done, a bug is reported by the stock
2551 * FC11 i386. Due to the fact that it has lots of kernel
2552 * debugging enabled.
2554 sg_init_table(dd
->port
->commands
[i
].sg
, MTIP_MAX_SG
);
2556 /* Mark all commands as currently inactive.*/
2557 atomic_set(&dd
->port
->commands
[i
].active
, 0);
2560 /* Setup the pointers to the extended s_active and CI registers. */
2561 for (i
= 0; i
< dd
->slot_groups
; i
++) {
2562 dd
->port
->s_active
[i
] =
2563 dd
->port
->mmio
+ i
*0x80 + PORT_SCR_ACT
;
2564 dd
->port
->cmd_issue
[i
] =
2565 dd
->port
->mmio
+ i
*0x80 + PORT_COMMAND_ISSUE
;
2566 dd
->port
->completed
[i
] =
2567 dd
->port
->mmio
+ i
*0x80 + PORT_SDBV
;
2570 /* Reset the HBA. */
2571 if (mtip_hba_reset(dd
) < 0) {
2572 dev_err(&dd
->pdev
->dev
,
2573 "Card did not reset within timeout\n");
2578 mtip_init_port(dd
->port
);
2579 mtip_start_port(dd
->port
);
2581 /* Setup the ISR and enable interrupts. */
2582 rv
= devm_request_irq(&dd
->pdev
->dev
,
2586 dev_driver_string(&dd
->pdev
->dev
),
2590 dev_err(&dd
->pdev
->dev
,
2591 "Unable to allocate IRQ %d\n", dd
->pdev
->irq
);
2595 /* Enable interrupts on the HBA. */
2596 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
2597 dd
->mmio
+ HOST_CTL
);
2599 init_timer(&dd
->port
->cmd_timer
);
2600 dd
->port
->cmd_timer
.data
= (unsigned long int) dd
->port
;
2601 dd
->port
->cmd_timer
.function
= mtip_timeout_function
;
2602 mod_timer(&dd
->port
->cmd_timer
,
2603 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
2605 if (mtip_get_identify(dd
->port
, NULL
) < 0) {
2609 mtip_dump_identify(dd
->port
);
2611 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
2612 MTIP_FTL_REBUILD_MAGIC
) {
2613 return mtip_ftl_rebuild_poll(dd
);
2618 del_timer_sync(&dd
->port
->cmd_timer
);
2620 /* Disable interrupts on the HBA. */
2621 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
2622 dd
->mmio
+ HOST_CTL
);
2624 /*Release the IRQ. */
2625 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
2628 mtip_deinit_port(dd
->port
);
2630 /* Free the command/command header memory. */
2631 dmam_free_coherent(&dd
->pdev
->dev
,
2632 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 2),
2633 dd
->port
->command_list
,
2634 dd
->port
->command_list_dma
);
2636 /* Free the memory allocated for the for structure. */
2643 * Called to deinitialize an interface.
2645 * @dd Pointer to the driver data structure.
2650 static int mtip_hw_exit(struct driver_data
*dd
)
2653 * Send standby immediate (E0h) to the drive so that it
2656 if (atomic_read(&dd
->drv_cleanup_done
) != true) {
2658 mtip_standby_immediate(dd
->port
);
2660 /* de-initialize the port. */
2661 mtip_deinit_port(dd
->port
);
2663 /* Disable interrupts on the HBA. */
2664 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
2665 dd
->mmio
+ HOST_CTL
);
2668 del_timer_sync(&dd
->port
->cmd_timer
);
2670 /* Stop the bottom half tasklet. */
2671 tasklet_kill(&dd
->tasklet
);
2673 /* Release the IRQ. */
2674 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
2676 /* Free the command/command header memory. */
2677 dmam_free_coherent(&dd
->pdev
->dev
,
2678 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 2),
2679 dd
->port
->command_list
,
2680 dd
->port
->command_list_dma
);
2681 /* Free the memory allocated for the for structure. */
2688 * Issue a Standby Immediate command to the device.
2690 * This function is called by the Block Layer just before the
2691 * system powers off during a shutdown.
2693 * @dd Pointer to the driver data structure.
2698 static int mtip_hw_shutdown(struct driver_data
*dd
)
2701 * Send standby immediate (E0h) to the drive so that it
2704 mtip_standby_immediate(dd
->port
);
2712 * This function is called by the Block Layer just before the
2713 * system hibernates.
2715 * @dd Pointer to the driver data structure.
2718 * 0 Suspend was successful
2719 * -EFAULT Suspend was not successful
2721 static int mtip_hw_suspend(struct driver_data
*dd
)
2724 * Send standby immediate (E0h) to the drive
2725 * so that it saves its state.
2727 if (mtip_standby_immediate(dd
->port
) != 0) {
2728 dev_err(&dd
->pdev
->dev
,
2729 "Failed standby-immediate command\n");
2733 /* Disable interrupts on the HBA.*/
2734 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
2735 dd
->mmio
+ HOST_CTL
);
2736 mtip_deinit_port(dd
->port
);
2744 * This function is called by the Block Layer as the
2747 * @dd Pointer to the driver data structure.
2750 * 0 Resume was successful
2751 * -EFAULT Resume was not successful
2753 static int mtip_hw_resume(struct driver_data
*dd
)
2755 /* Perform any needed hardware setup steps */
2759 if (mtip_hba_reset(dd
) != 0) {
2760 dev_err(&dd
->pdev
->dev
,
2761 "Unable to reset the HBA\n");
2766 * Enable the port, DMA engine, and FIS reception specific
2767 * h/w in controller.
2769 mtip_init_port(dd
->port
);
2770 mtip_start_port(dd
->port
);
2772 /* Enable interrupts on the HBA.*/
2773 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
2774 dd
->mmio
+ HOST_CTL
);
2780 * Helper function for reusing disk name
2781 * upon hot insertion.
2783 static int rssd_disk_name_format(char *prefix
,
2788 const int base
= 'z' - 'a' + 1;
2789 char *begin
= buf
+ strlen(prefix
);
2790 char *end
= buf
+ buflen
;
2800 *--p
= 'a' + (index
% unit
);
2801 index
= (index
/ unit
) - 1;
2802 } while (index
>= 0);
2804 memmove(begin
, p
, end
- p
);
2805 memcpy(buf
, prefix
, strlen(prefix
));
2811 * Block layer IOCTL handler.
2813 * @dev Pointer to the block_device structure.
2815 * @cmd IOCTL command passed from the user application.
2816 * @arg Argument passed from the user application.
2819 * 0 IOCTL completed successfully.
2820 * -ENOTTY IOCTL not supported or invalid driver data
2821 * structure pointer.
2823 static int mtip_block_ioctl(struct block_device
*dev
,
2828 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
2830 if (!capable(CAP_SYS_ADMIN
))
2840 return mtip_hw_ioctl(dd
, cmd
, arg
);
2844 #ifdef CONFIG_COMPAT
2846 * Block layer compat IOCTL handler.
2848 * @dev Pointer to the block_device structure.
2850 * @cmd IOCTL command passed from the user application.
2851 * @arg Argument passed from the user application.
2854 * 0 IOCTL completed successfully.
2855 * -ENOTTY IOCTL not supported or invalid driver data
2856 * structure pointer.
2858 static int mtip_block_compat_ioctl(struct block_device
*dev
,
2863 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
2865 if (!capable(CAP_SYS_ADMIN
))
2874 case HDIO_DRIVE_TASKFILE
: {
2875 struct mtip_compat_ide_task_request_s
*compat_req_task
;
2876 ide_task_request_t req_task
;
2877 int compat_tasksize
, outtotal
, ret
;
2879 compat_tasksize
= sizeof(struct mtip_compat_ide_task_request_s
);
2882 (struct mtip_compat_ide_task_request_s __user
*) arg
;
2884 if (copy_from_user(&req_task
, (void __user
*) arg
,
2885 compat_tasksize
- (2 * sizeof(compat_long_t
))))
2888 if (get_user(req_task
.out_size
, &compat_req_task
->out_size
))
2891 if (get_user(req_task
.in_size
, &compat_req_task
->in_size
))
2894 outtotal
= sizeof(struct mtip_compat_ide_task_request_s
);
2896 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
2897 &req_task
, outtotal
);
2899 if (copy_to_user((void __user
*) arg
, &req_task
,
2901 (2 * sizeof(compat_long_t
))))
2904 if (put_user(req_task
.out_size
, &compat_req_task
->out_size
))
2907 if (put_user(req_task
.in_size
, &compat_req_task
->in_size
))
2913 return mtip_hw_ioctl(dd
, cmd
, arg
);
2919 * Obtain the geometry of the device.
2921 * You may think that this function is obsolete, but some applications,
2922 * fdisk for example still used CHS values. This function describes the
2923 * device as having 224 heads and 56 sectors per cylinder. These values are
2924 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
2925 * partition is described in terms of a start and end cylinder this means
2926 * that each partition is also 4KB aligned. Non-aligned partitions adversely
2927 * affects performance.
2929 * @dev Pointer to the block_device strucutre.
2930 * @geo Pointer to a hd_geometry structure.
2933 * 0 Operation completed successfully.
2934 * -ENOTTY An error occurred while reading the drive capacity.
2936 static int mtip_block_getgeo(struct block_device
*dev
,
2937 struct hd_geometry
*geo
)
2939 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
2945 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
2946 dev_warn(&dd
->pdev
->dev
,
2947 "Could not get drive capacity.\n");
2953 #if BITS_PER_LONG == 64
2954 geo
->cylinders
= capacity
/ (geo
->heads
* geo
->sectors
);
2956 do_div(capacity
, (geo
->heads
* geo
->sectors
));
2957 geo
->cylinders
= capacity
;
2963 * Block device operation function.
2965 * This structure contains pointers to the functions required by the block
2968 static const struct block_device_operations mtip_block_ops
= {
2969 .ioctl
= mtip_block_ioctl
,
2970 #ifdef CONFIG_COMPAT
2971 .compat_ioctl
= mtip_block_compat_ioctl
,
2973 .getgeo
= mtip_block_getgeo
,
2974 .owner
= THIS_MODULE
2978 * Block layer make request function.
2980 * This function is called by the kernel to process a BIO for
2983 * @queue Pointer to the request queue. Unused other than to obtain
2984 * the driver data structure.
2985 * @bio Pointer to the BIO.
2990 static int mtip_make_request(struct request_queue
*queue
, struct bio
*bio
)
2992 struct driver_data
*dd
= queue
->queuedata
;
2993 struct scatterlist
*sg
;
2994 struct bio_vec
*bvec
;
2998 if (unlikely(!bio_has_data(bio
))) {
2999 blk_queue_flush(queue
, 0);
3004 if (unlikely(atomic_read(&dd
->eh_active
))) {
3005 bio_endio(bio
, -EBUSY
);
3009 sg
= mtip_hw_get_scatterlist(dd
, &tag
);
3010 if (likely(sg
!= NULL
)) {
3011 blk_queue_bounce(queue
, &bio
);
3013 if (unlikely((bio
)->bi_vcnt
> MTIP_MAX_SG
)) {
3014 dev_warn(&dd
->pdev
->dev
,
3015 "Maximum number of SGL entries exceeded");
3017 mtip_hw_release_scatterlist(dd
, tag
);
3021 /* Create the scatter list for this bio. */
3022 bio_for_each_segment(bvec
, bio
, nents
) {
3023 sg_set_page(&sg
[nents
],
3029 /* Issue the read/write. */
3030 mtip_hw_submit_io(dd
,
3037 bio
->bi_rw
& REQ_FLUSH
,
3047 * Block layer initialization function.
3049 * This function is called once by the PCI layer for each P320
3050 * device that is connected to the system.
3052 * @dd Pointer to the driver data structure.
3055 * 0 on success else an error code.
3057 static int mtip_block_initialize(struct driver_data
*dd
)
3061 unsigned int index
= 0;
3062 struct kobject
*kobj
;
3064 /* Initialize the protocol layer. */
3065 rv
= mtip_hw_init(dd
);
3067 dev_err(&dd
->pdev
->dev
,
3068 "Protocol layer initialization failed\n");
3070 goto protocol_init_error
;
3073 /* Allocate the request queue. */
3074 dd
->queue
= blk_alloc_queue(GFP_KERNEL
);
3075 if (dd
->queue
== NULL
) {
3076 dev_err(&dd
->pdev
->dev
,
3077 "Unable to allocate request queue\n");
3079 goto block_queue_alloc_init_error
;
3082 /* Attach our request function to the request queue. */
3083 blk_queue_make_request(dd
->queue
, mtip_make_request
);
3085 /* Set device limits. */
3086 set_bit(QUEUE_FLAG_NONROT
, &dd
->queue
->queue_flags
);
3087 blk_queue_max_segments(dd
->queue
, MTIP_MAX_SG
);
3088 blk_queue_physical_block_size(dd
->queue
, 4096);
3089 blk_queue_io_min(dd
->queue
, 4096);
3091 dd
->disk
= alloc_disk(MTIP_MAX_MINORS
);
3092 if (dd
->disk
== NULL
) {
3093 dev_err(&dd
->pdev
->dev
,
3094 "Unable to allocate gendisk structure\n");
3096 goto alloc_disk_error
;
3099 /* Generate the disk name, implemented same as in sd.c */
3101 if (!ida_pre_get(&rssd_index_ida
, GFP_KERNEL
))
3104 spin_lock(&rssd_index_lock
);
3105 rv
= ida_get_new(&rssd_index_ida
, &index
);
3106 spin_unlock(&rssd_index_lock
);
3107 } while (rv
== -EAGAIN
);
3112 rv
= rssd_disk_name_format("rssd",
3114 dd
->disk
->disk_name
,
3117 goto disk_index_error
;
3119 dd
->disk
->driverfs_dev
= &dd
->pdev
->dev
;
3120 dd
->disk
->major
= dd
->major
;
3121 dd
->disk
->first_minor
= dd
->instance
* MTIP_MAX_MINORS
;
3122 dd
->disk
->fops
= &mtip_block_ops
;
3123 dd
->disk
->queue
= dd
->queue
;
3124 dd
->disk
->private_data
= dd
;
3125 dd
->queue
->queuedata
= dd
;
3128 /* Set the capacity of the device in 512 byte sectors. */
3129 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3130 dev_warn(&dd
->pdev
->dev
,
3131 "Could not read drive capacity\n");
3133 goto read_capacity_error
;
3135 set_capacity(dd
->disk
, capacity
);
3137 /* Enable the block device and add it to /dev */
3141 * Now that the disk is active, initialize any sysfs attributes
3142 * managed by the protocol layer.
3144 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3146 mtip_hw_sysfs_init(dd
, kobj
);
3152 read_capacity_error
:
3154 * Delete our gendisk structure. This also removes the device
3157 del_gendisk(dd
->disk
);
3160 spin_lock(&rssd_index_lock
);
3161 ida_remove(&rssd_index_ida
, index
);
3162 spin_unlock(&rssd_index_lock
);
3168 blk_cleanup_queue(dd
->queue
);
3170 block_queue_alloc_init_error
:
3171 /* De-initialize the protocol layer. */
3174 protocol_init_error
:
3179 * Block layer deinitialization function.
3181 * Called by the PCI layer as each P320 device is removed.
3183 * @dd Pointer to the driver data structure.
3188 static int mtip_block_remove(struct driver_data
*dd
)
3190 struct kobject
*kobj
;
3191 /* Clean up the sysfs attributes managed by the protocol layer. */
3192 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3194 mtip_hw_sysfs_exit(dd
, kobj
);
3199 * Delete our gendisk structure. This also removes the device
3202 del_gendisk(dd
->disk
);
3203 blk_cleanup_queue(dd
->queue
);
3207 /* De-initialize the protocol layer. */
3214 * Function called by the PCI layer when just before the
3215 * machine shuts down.
3217 * If a protocol layer shutdown function is present it will be called
3220 * @dd Pointer to the driver data structure.
3225 static int mtip_block_shutdown(struct driver_data
*dd
)
3227 dev_info(&dd
->pdev
->dev
,
3228 "Shutting down %s ...\n", dd
->disk
->disk_name
);
3230 /* Delete our gendisk structure, and cleanup the blk queue. */
3231 del_gendisk(dd
->disk
);
3232 blk_cleanup_queue(dd
->queue
);
3236 mtip_hw_shutdown(dd
);
3240 static int mtip_block_suspend(struct driver_data
*dd
)
3242 dev_info(&dd
->pdev
->dev
,
3243 "Suspending %s ...\n", dd
->disk
->disk_name
);
3244 mtip_hw_suspend(dd
);
3248 static int mtip_block_resume(struct driver_data
*dd
)
3250 dev_info(&dd
->pdev
->dev
, "Resuming %s ...\n",
3251 dd
->disk
->disk_name
);
3257 * Called for each supported PCI device detected.
3259 * This function allocates the private data structure, enables the
3260 * PCI device and then calls the block layer initialization function.
3263 * 0 on success else an error code.
3265 static int mtip_pci_probe(struct pci_dev
*pdev
,
3266 const struct pci_device_id
*ent
)
3269 struct driver_data
*dd
= NULL
;
3271 /* Allocate memory for this devices private data. */
3272 dd
= kzalloc(sizeof(struct driver_data
), GFP_KERNEL
);
3275 "Unable to allocate memory for driver data\n");
3279 /* Set the atomic variable as 1 in case of SRSI */
3280 atomic_set(&dd
->drv_cleanup_done
, true);
3282 atomic_set(&dd
->resumeflag
, false);
3283 atomic_set(&dd
->eh_active
, 0);
3285 /* Attach the private data to this PCI device. */
3286 pci_set_drvdata(pdev
, dd
);
3288 rv
= pcim_enable_device(pdev
);
3290 dev_err(&pdev
->dev
, "Unable to enable device\n");
3294 /* Map BAR5 to memory. */
3295 rv
= pcim_iomap_regions(pdev
, 1 << MTIP_ABAR
, MTIP_DRV_NAME
);
3297 dev_err(&pdev
->dev
, "Unable to map regions\n");
3301 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(64))) {
3302 rv
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
3305 rv
= pci_set_consistent_dma_mask(pdev
,
3308 dev_warn(&pdev
->dev
,
3309 "64-bit DMA enable failed\n");
3315 pci_set_master(pdev
);
3317 if (pci_enable_msi(pdev
)) {
3318 dev_warn(&pdev
->dev
,
3319 "Unable to enable MSI interrupt.\n");
3320 goto block_initialize_err
;
3323 /* Copy the info we may need later into the private data structure. */
3324 dd
->major
= mtip_major
;
3325 dd
->protocol
= ent
->driver_data
;
3326 dd
->instance
= instance
;
3329 /* Initialize the block layer. */
3330 rv
= mtip_block_initialize(dd
);
3333 "Unable to initialize block layer\n");
3334 goto block_initialize_err
;
3338 * Increment the instance count so that each device has a unique
3345 block_initialize_err
:
3346 pci_disable_msi(pdev
);
3349 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
3353 pci_set_drvdata(pdev
, NULL
);
3356 /* Set the atomic variable as 0 in case of SRSI */
3357 atomic_set(&dd
->drv_cleanup_done
, true);
3363 * Called for each probed device when the device is removed or the
3364 * driver is unloaded.
3369 static void mtip_pci_remove(struct pci_dev
*pdev
)
3371 struct driver_data
*dd
= pci_get_drvdata(pdev
);
3374 if (mtip_check_surprise_removal(pdev
)) {
3375 while (atomic_read(&dd
->drv_cleanup_done
) == false) {
3378 if (counter
== 10) {
3379 /* Cleanup the outstanding commands */
3380 mtip_command_cleanup(dd
);
3385 /* Set the atomic variable as 1 in case of SRSI */
3386 atomic_set(&dd
->drv_cleanup_done
, true);
3388 /* Clean up the block layer. */
3389 mtip_block_remove(dd
);
3391 pci_disable_msi(pdev
);
3394 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
3398 * Called for each probed device when the device is suspended.
3404 static int mtip_pci_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
3407 struct driver_data
*dd
= pci_get_drvdata(pdev
);
3411 "Driver private datastructure is NULL\n");
3415 atomic_set(&dd
->resumeflag
, true);
3417 /* Disable ports & interrupts then send standby immediate */
3418 rv
= mtip_block_suspend(dd
);
3421 "Failed to suspend controller\n");
3426 * Save the pci config space to pdev structure &
3427 * disable the device
3429 pci_save_state(pdev
);
3430 pci_disable_device(pdev
);
3432 /* Move to Low power state*/
3433 pci_set_power_state(pdev
, PCI_D3hot
);
3439 * Called for each probed device when the device is resumed.
3445 static int mtip_pci_resume(struct pci_dev
*pdev
)
3448 struct driver_data
*dd
;
3450 dd
= pci_get_drvdata(pdev
);
3453 "Driver private datastructure is NULL\n");
3457 /* Move the device to active State */
3458 pci_set_power_state(pdev
, PCI_D0
);
3460 /* Restore PCI configuration space */
3461 pci_restore_state(pdev
);
3463 /* Enable the PCI device*/
3464 rv
= pcim_enable_device(pdev
);
3467 "Failed to enable card during resume\n");
3470 pci_set_master(pdev
);
3473 * Calls hbaReset, initPort, & startPort function
3474 * then enables interrupts
3476 rv
= mtip_block_resume(dd
);
3478 dev_err(&pdev
->dev
, "Unable to resume\n");
3481 atomic_set(&dd
->resumeflag
, false);
3492 static void mtip_pci_shutdown(struct pci_dev
*pdev
)
3494 struct driver_data
*dd
= pci_get_drvdata(pdev
);
3496 mtip_block_shutdown(dd
);
3499 /* Table of device ids supported by this driver. */
3500 static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl
) = {
3501 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320_DEVICE_ID
) },
3505 /* Structure that describes the PCI driver functions. */
3506 static struct pci_driver mtip_pci_driver
= {
3507 .name
= MTIP_DRV_NAME
,
3508 .id_table
= mtip_pci_tbl
,
3509 .probe
= mtip_pci_probe
,
3510 .remove
= mtip_pci_remove
,
3511 .suspend
= mtip_pci_suspend
,
3512 .resume
= mtip_pci_resume
,
3513 .shutdown
= mtip_pci_shutdown
,
3516 MODULE_DEVICE_TABLE(pci
, mtip_pci_tbl
);
3519 * Module initialization function.
3521 * Called once when the module is loaded. This function allocates a major
3522 * block device number to the Cyclone devices and registers the PCI layer
3526 * 0 on success else error code.
3528 static int __init
mtip_init(void)
3530 printk(KERN_INFO MTIP_DRV_NAME
" Version " MTIP_DRV_VERSION
"\n");
3532 /* Allocate a major block device number to use with this driver. */
3533 mtip_major
= register_blkdev(0, MTIP_DRV_NAME
);
3534 if (mtip_major
< 0) {
3535 printk(KERN_ERR
"Unable to register block device (%d)\n",
3540 /* Register our PCI operations. */
3541 return pci_register_driver(&mtip_pci_driver
);
3545 * Module de-initialization function.
3547 * Called once when the module is unloaded. This function deallocates
3548 * the major block device number allocated by mtip_init() and
3549 * unregisters the PCI layer of the driver.
3554 static void __exit
mtip_exit(void)
3556 /* Release the allocated major block device number. */
3557 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
3559 /* Unregister the PCI driver. */
3560 pci_unregister_driver(&mtip_pci_driver
);
3563 MODULE_AUTHOR("Micron Technology, Inc");
3564 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
3565 MODULE_LICENSE("GPL");
3566 MODULE_VERSION(MTIP_DRV_VERSION
);
3568 module_init(mtip_init
);
3569 module_exit(mtip_exit
);