2 * Driver for the Micron P320 SSD
3 * Copyright (C) 2011 Micron Technology, Inc.
5 * Portions of this code were derived from works subjected to the
7 * Copyright (C) 2009 Integrated Device Technology, Inc.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
21 #include <linux/pci.h>
22 #include <linux/interrupt.h>
23 #include <linux/ata.h>
24 #include <linux/delay.h>
25 #include <linux/hdreg.h>
26 #include <linux/uaccess.h>
27 #include <linux/random.h>
28 #include <linux/smp.h>
29 #include <linux/compat.h>
31 #include <linux/module.h>
32 #include <linux/genhd.h>
33 #include <linux/blkdev.h>
34 #include <linux/bio.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/idr.h>
37 #include <linux/kthread.h>
38 #include <../drivers/ata/ahci.h>
39 #include <linux/export.h>
40 #include <linux/debugfs.h>
43 #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
44 #define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16))
45 #define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS)
46 #define HW_PORT_PRIV_DMA_SZ \
47 (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ)
49 #define HOST_CAP_NZDMA (1 << 19)
50 #define HOST_HSORG 0xFC
51 #define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
52 #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
53 #define HSORG_HWREV 0xFF00
54 #define HSORG_STYLE 0x8
55 #define HSORG_SLOTGROUPS 0x7
57 #define PORT_COMMAND_ISSUE 0x38
58 #define PORT_SDBV 0x7C
60 #define PORT_OFFSET 0x100
61 #define PORT_MEM_SIZE 0x80
63 #define PORT_IRQ_ERR \
64 (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
65 PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
66 PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
68 #define PORT_IRQ_LEGACY \
69 (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
70 #define PORT_IRQ_HANDLED \
71 (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
72 PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
73 PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
74 #define DEF_PORT_IRQ \
75 (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
78 #define MTIP_PRODUCT_UNKNOWN 0x00
79 #define MTIP_PRODUCT_ASICFPGA 0x11
81 /* Device instance number, incremented each time a device is probed. */
85 * Global variable used to hold the major block device number
86 * allocated in mtip_init().
88 static int mtip_major
;
89 static struct dentry
*dfs_parent
;
91 static DEFINE_SPINLOCK(rssd_index_lock
);
92 static DEFINE_IDA(rssd_index_ida
);
94 static int mtip_block_initialize(struct driver_data
*dd
);
97 struct mtip_compat_ide_task_request_s
{
100 ide_reg_valid_t out_flags
;
101 ide_reg_valid_t in_flags
;
104 compat_ulong_t out_size
;
105 compat_ulong_t in_size
;
110 * This function check_for_surprise_removal is called
111 * while card is removed from the system and it will
112 * read the vendor id from the configration space
114 * @pdev Pointer to the pci_dev structure.
117 * true if device removed, else false
119 static bool mtip_check_surprise_removal(struct pci_dev
*pdev
)
123 /* Read the vendorID from the configuration space */
124 pci_read_config_word(pdev
, 0x00, &vendor_id
);
125 if (vendor_id
== 0xFFFF)
126 return true; /* device removed */
128 return false; /* device present */
132 * This function is called for clean the pending command in the
133 * command slot during the surprise removal of device and return
134 * error to the upper layer.
136 * @dd Pointer to the DRIVER_DATA structure.
141 static void mtip_command_cleanup(struct driver_data
*dd
)
143 int group
= 0, commandslot
= 0, commandindex
= 0;
144 struct mtip_cmd
*command
;
145 struct mtip_port
*port
= dd
->port
;
146 static int in_progress
;
153 for (group
= 0; group
< 4; group
++) {
154 for (commandslot
= 0; commandslot
< 32; commandslot
++) {
155 if (!(port
->allocated
[group
] & (1 << commandslot
)))
158 commandindex
= group
<< 5 | commandslot
;
159 command
= &port
->commands
[commandindex
];
161 if (atomic_read(&command
->active
)
162 && (command
->async_callback
)) {
163 command
->async_callback(command
->async_data
,
165 command
->async_callback
= NULL
;
166 command
->async_data
= NULL
;
169 dma_unmap_sg(&port
->dd
->pdev
->dev
,
171 command
->scatter_ents
,
178 set_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
);
183 * Obtain an empty command slot.
185 * This function needs to be reentrant since it could be called
186 * at the same time on multiple CPUs. The allocation of the
187 * command slot must be atomic.
189 * @port Pointer to the port data structure.
192 * >= 0 Index of command slot obtained.
193 * -1 No command slots available.
195 static int get_slot(struct mtip_port
*port
)
198 unsigned int num_command_slots
= port
->dd
->slot_groups
* 32;
201 * Try 10 times, because there is a small race here.
202 * that's ok, because it's still cheaper than a lock.
204 * Race: Since this section is not protected by lock, same bit
205 * could be chosen by different process contexts running in
206 * different processor. So instead of costly lock, we are going
209 for (i
= 0; i
< 10; i
++) {
210 slot
= find_next_zero_bit(port
->allocated
,
211 num_command_slots
, 1);
212 if ((slot
< num_command_slots
) &&
213 (!test_and_set_bit(slot
, port
->allocated
)))
216 dev_warn(&port
->dd
->pdev
->dev
, "Failed to get a tag.\n");
218 if (mtip_check_surprise_removal(port
->dd
->pdev
)) {
219 /* Device not present, clean outstanding commands */
220 mtip_command_cleanup(port
->dd
);
226 * Release a command slot.
228 * @port Pointer to the port data structure.
229 * @tag Tag of command to release
234 static inline void release_slot(struct mtip_port
*port
, int tag
)
236 smp_mb__before_clear_bit();
237 clear_bit(tag
, port
->allocated
);
238 smp_mb__after_clear_bit();
242 * Reset the HBA (without sleeping)
244 * Just like hba_reset, except does not call sleep, so can be
245 * run from interrupt/tasklet context.
247 * @dd Pointer to the driver data structure.
250 * 0 The reset was successful.
251 * -1 The HBA Reset bit did not clear.
253 static int hba_reset_nosleep(struct driver_data
*dd
)
255 unsigned long timeout
;
257 /* Chip quirk: quiesce any chip function */
260 /* Set the reset bit */
261 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
264 readl(dd
->mmio
+ HOST_CTL
);
267 * Wait 10ms then spin for up to 1 second
268 * waiting for reset acknowledgement
270 timeout
= jiffies
+ msecs_to_jiffies(1000);
272 while ((readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
273 && time_before(jiffies
, timeout
))
276 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))
279 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
)
286 * Issue a command to the hardware.
288 * Set the appropriate bit in the s_active and Command Issue hardware
289 * registers, causing hardware command processing to begin.
291 * @port Pointer to the port structure.
292 * @tag The tag of the command to be issued.
297 static inline void mtip_issue_ncq_command(struct mtip_port
*port
, int tag
)
299 atomic_set(&port
->commands
[tag
].active
, 1);
301 spin_lock(&port
->cmd_issue_lock
);
303 writel((1 << MTIP_TAG_BIT(tag
)),
304 port
->s_active
[MTIP_TAG_INDEX(tag
)]);
305 writel((1 << MTIP_TAG_BIT(tag
)),
306 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
308 spin_unlock(&port
->cmd_issue_lock
);
310 /* Set the command's timeout value.*/
311 port
->commands
[tag
].comp_time
= jiffies
+ msecs_to_jiffies(
312 MTIP_NCQ_COMMAND_TIMEOUT_MS
);
316 * Enable/disable the reception of FIS
318 * @port Pointer to the port data structure
319 * @enable 1 to enable, 0 to disable
322 * Previous state: 1 enabled, 0 disabled
324 static int mtip_enable_fis(struct mtip_port
*port
, int enable
)
328 /* enable FIS reception */
329 tmp
= readl(port
->mmio
+ PORT_CMD
);
331 writel(tmp
| PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
333 writel(tmp
& ~PORT_CMD_FIS_RX
, port
->mmio
+ PORT_CMD
);
336 readl(port
->mmio
+ PORT_CMD
);
338 return (((tmp
& PORT_CMD_FIS_RX
) == PORT_CMD_FIS_RX
));
342 * Enable/disable the DMA engine
344 * @port Pointer to the port data structure
345 * @enable 1 to enable, 0 to disable
348 * Previous state: 1 enabled, 0 disabled.
350 static int mtip_enable_engine(struct mtip_port
*port
, int enable
)
354 /* enable FIS reception */
355 tmp
= readl(port
->mmio
+ PORT_CMD
);
357 writel(tmp
| PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
359 writel(tmp
& ~PORT_CMD_START
, port
->mmio
+ PORT_CMD
);
361 readl(port
->mmio
+ PORT_CMD
);
362 return (((tmp
& PORT_CMD_START
) == PORT_CMD_START
));
366 * Enables the port DMA engine and FIS reception.
371 static inline void mtip_start_port(struct mtip_port
*port
)
373 /* Enable FIS reception */
374 mtip_enable_fis(port
, 1);
376 /* Enable the DMA engine */
377 mtip_enable_engine(port
, 1);
381 * Deinitialize a port by disabling port interrupts, the DMA engine,
384 * @port Pointer to the port structure
389 static inline void mtip_deinit_port(struct mtip_port
*port
)
391 /* Disable interrupts on this port */
392 writel(0, port
->mmio
+ PORT_IRQ_MASK
);
394 /* Disable the DMA engine */
395 mtip_enable_engine(port
, 0);
397 /* Disable FIS reception */
398 mtip_enable_fis(port
, 0);
404 * This function deinitializes the port by calling mtip_deinit_port() and
405 * then initializes it by setting the command header and RX FIS addresses,
406 * clearing the SError register and any pending port interrupts before
407 * re-enabling the default set of port interrupts.
409 * @port Pointer to the port structure.
414 static void mtip_init_port(struct mtip_port
*port
)
417 mtip_deinit_port(port
);
419 /* Program the command list base and FIS base addresses */
420 if (readl(port
->dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
) {
421 writel((port
->command_list_dma
>> 16) >> 16,
422 port
->mmio
+ PORT_LST_ADDR_HI
);
423 writel((port
->rxfis_dma
>> 16) >> 16,
424 port
->mmio
+ PORT_FIS_ADDR_HI
);
427 writel(port
->command_list_dma
& 0xFFFFFFFF,
428 port
->mmio
+ PORT_LST_ADDR
);
429 writel(port
->rxfis_dma
& 0xFFFFFFFF, port
->mmio
+ PORT_FIS_ADDR
);
432 writel(readl(port
->mmio
+ PORT_SCR_ERR
), port
->mmio
+ PORT_SCR_ERR
);
434 /* reset the completed registers.*/
435 for (i
= 0; i
< port
->dd
->slot_groups
; i
++)
436 writel(0xFFFFFFFF, port
->completed
[i
]);
438 /* Clear any pending interrupts for this port */
439 writel(readl(port
->mmio
+ PORT_IRQ_STAT
), port
->mmio
+ PORT_IRQ_STAT
);
441 /* Clear any pending interrupts on the HBA. */
442 writel(readl(port
->dd
->mmio
+ HOST_IRQ_STAT
),
443 port
->dd
->mmio
+ HOST_IRQ_STAT
);
445 /* Enable port interrupts */
446 writel(DEF_PORT_IRQ
, port
->mmio
+ PORT_IRQ_MASK
);
452 * @port Pointer to the port data structure.
457 static void mtip_restart_port(struct mtip_port
*port
)
459 unsigned long timeout
;
461 /* Disable the DMA engine */
462 mtip_enable_engine(port
, 0);
464 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
465 timeout
= jiffies
+ msecs_to_jiffies(500);
466 while ((readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
)
467 && time_before(jiffies
, timeout
))
470 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
474 * Chip quirk: escalate to hba reset if
475 * PxCMD.CR not clear after 500 ms
477 if (readl(port
->mmio
+ PORT_CMD
) & PORT_CMD_LIST_ON
) {
478 dev_warn(&port
->dd
->pdev
->dev
,
479 "PxCMD.CR not clear, escalating reset\n");
481 if (hba_reset_nosleep(port
->dd
))
482 dev_err(&port
->dd
->pdev
->dev
,
483 "HBA reset escalation failed.\n");
485 /* 30 ms delay before com reset to quiesce chip */
489 dev_warn(&port
->dd
->pdev
->dev
, "Issuing COM reset\n");
492 writel(readl(port
->mmio
+ PORT_SCR_CTL
) |
493 1, port
->mmio
+ PORT_SCR_CTL
);
494 readl(port
->mmio
+ PORT_SCR_CTL
);
496 /* Wait 1 ms to quiesce chip function */
497 timeout
= jiffies
+ msecs_to_jiffies(1);
498 while (time_before(jiffies
, timeout
))
501 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
504 /* Clear PxSCTL.DET */
505 writel(readl(port
->mmio
+ PORT_SCR_CTL
) & ~1,
506 port
->mmio
+ PORT_SCR_CTL
);
507 readl(port
->mmio
+ PORT_SCR_CTL
);
509 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
510 timeout
= jiffies
+ msecs_to_jiffies(500);
511 while (((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
512 && time_before(jiffies
, timeout
))
515 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
518 if ((readl(port
->mmio
+ PORT_SCR_STAT
) & 0x01) == 0)
519 dev_warn(&port
->dd
->pdev
->dev
,
520 "COM reset failed\n");
522 mtip_init_port(port
);
523 mtip_start_port(port
);
528 * Helper function for tag logging
530 static void print_tags(struct driver_data
*dd
,
532 unsigned long *tagbits
,
535 unsigned char tagmap
[128];
536 int group
, tagmap_len
= 0;
538 memset(tagmap
, 0, sizeof(tagmap
));
539 for (group
= SLOTBITS_IN_LONGS
; group
> 0; group
--)
540 tagmap_len
= sprintf(tagmap
+ tagmap_len
, "%016lX ",
542 dev_warn(&dd
->pdev
->dev
,
543 "%d command(s) %s: tagmap [%s]", cnt
, msg
, tagmap
);
547 * Called periodically to see if any read/write commands are
548 * taking too long to complete.
550 * @data Pointer to the PORT data structure.
555 static void mtip_timeout_function(unsigned long int data
)
557 struct mtip_port
*port
= (struct mtip_port
*) data
;
558 struct host_to_dev_fis
*fis
;
559 struct mtip_cmd
*command
;
560 int tag
, cmdto_cnt
= 0;
561 unsigned int bit
, group
;
562 unsigned int num_command_slots
;
563 unsigned long to
, tagaccum
[SLOTBITS_IN_LONGS
];
568 if (test_bit(MTIP_DDF_RESUME_BIT
, &port
->dd
->dd_flag
)) {
569 mod_timer(&port
->cmd_timer
,
570 jiffies
+ msecs_to_jiffies(30000));
573 /* clear the tag accumulator */
574 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
575 num_command_slots
= port
->dd
->slot_groups
* 32;
577 for (tag
= 0; tag
< num_command_slots
; tag
++) {
579 * Skip internal command slot as it has
580 * its own timeout mechanism
582 if (tag
== MTIP_TAG_INTERNAL
)
585 if (atomic_read(&port
->commands
[tag
].active
) &&
586 (time_after(jiffies
, port
->commands
[tag
].comp_time
))) {
590 command
= &port
->commands
[tag
];
591 fis
= (struct host_to_dev_fis
*) command
->command
;
593 set_bit(tag
, tagaccum
);
596 set_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
599 * Clear the completed bit. This should prevent
600 * any interrupt handlers from trying to retire
603 writel(1 << bit
, port
->completed
[group
]);
605 /* Call the async completion callback. */
606 if (likely(command
->async_callback
))
607 command
->async_callback(command
->async_data
,
609 command
->async_callback
= NULL
;
610 command
->comp_func
= NULL
;
612 /* Unmap the DMA scatter list entries */
613 dma_unmap_sg(&port
->dd
->pdev
->dev
,
615 command
->scatter_ents
,
619 * Clear the allocated bit and active tag for the
622 atomic_set(&port
->commands
[tag
].active
, 0);
623 release_slot(port
, tag
);
630 print_tags(port
->dd
, "timed out", tagaccum
, cmdto_cnt
);
631 if (!test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
)) {
632 mtip_restart_port(port
);
633 wake_up_interruptible(&port
->svc_wait
);
635 clear_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
638 if (port
->ic_pause_timer
) {
639 to
= port
->ic_pause_timer
+ msecs_to_jiffies(1000);
640 if (time_after(jiffies
, to
)) {
641 if (!test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
)) {
642 port
->ic_pause_timer
= 0;
643 clear_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
644 clear_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
645 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
646 wake_up_interruptible(&port
->svc_wait
);
653 /* Restart the timer */
654 mod_timer(&port
->cmd_timer
,
655 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
659 * IO completion function.
661 * This completion function is called by the driver ISR when a
662 * command that was issued by the kernel completes. It first calls the
663 * asynchronous completion function which normally calls back into the block
664 * layer passing the asynchronous callback data, then unmaps the
665 * scatter list associated with the completed command, and finally
666 * clears the allocated bit associated with the completed command.
668 * @port Pointer to the port data structure.
669 * @tag Tag of the command.
670 * @data Pointer to driver_data.
671 * @status Completion status.
676 static void mtip_async_complete(struct mtip_port
*port
,
681 struct mtip_cmd
*command
;
682 struct driver_data
*dd
= data
;
683 int cb_status
= status
? -EIO
: 0;
685 if (unlikely(!dd
) || unlikely(!port
))
688 command
= &port
->commands
[tag
];
690 if (unlikely(status
== PORT_IRQ_TF_ERR
)) {
691 dev_warn(&port
->dd
->pdev
->dev
,
692 "Command tag %d failed due to TFE\n", tag
);
695 /* Upper layer callback */
696 if (likely(command
->async_callback
))
697 command
->async_callback(command
->async_data
, cb_status
);
699 command
->async_callback
= NULL
;
700 command
->comp_func
= NULL
;
702 /* Unmap the DMA scatter list entries */
703 dma_unmap_sg(&dd
->pdev
->dev
,
705 command
->scatter_ents
,
708 /* Clear the allocated and active bits for the command */
709 atomic_set(&port
->commands
[tag
].active
, 0);
710 release_slot(port
, tag
);
716 * Internal command completion callback function.
718 * This function is normally called by the driver ISR when an internal
719 * command completed. This function signals the command completion by
720 * calling complete().
722 * @port Pointer to the port data structure.
723 * @tag Tag of the command that has completed.
724 * @data Pointer to a completion structure.
725 * @status Completion status.
730 static void mtip_completion(struct mtip_port
*port
,
735 struct mtip_cmd
*command
= &port
->commands
[tag
];
736 struct completion
*waiting
= data
;
737 if (unlikely(status
== PORT_IRQ_TF_ERR
))
738 dev_warn(&port
->dd
->pdev
->dev
,
739 "Internal command %d completed with TFE\n", tag
);
741 command
->async_callback
= NULL
;
742 command
->comp_func
= NULL
;
747 static void mtip_null_completion(struct mtip_port
*port
,
755 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
756 dma_addr_t buffer_dma
, unsigned int sectors
);
757 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
758 struct smart_attr
*attrib
);
762 * @dd Pointer to the DRIVER_DATA structure.
767 static void mtip_handle_tfe(struct driver_data
*dd
)
769 int group
, tag
, bit
, reissue
, rv
;
770 struct mtip_port
*port
;
771 struct mtip_cmd
*cmd
;
773 struct host_to_dev_fis
*fis
;
774 unsigned long tagaccum
[SLOTBITS_IN_LONGS
];
775 unsigned int cmd_cnt
= 0;
777 char *fail_reason
= NULL
;
778 int fail_all_ncq_write
= 0, fail_all_ncq_cmds
= 0;
780 dev_warn(&dd
->pdev
->dev
, "Taskfile error\n");
784 /* Stop the timer to prevent command timeouts. */
785 del_timer(&port
->cmd_timer
);
786 set_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
788 if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
) &&
789 test_bit(MTIP_TAG_INTERNAL
, port
->allocated
)) {
790 cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
791 dbg_printk(MTIP_DRV_NAME
" TFE for the internal command\n");
793 atomic_inc(&cmd
->active
); /* active > 1 indicates error */
794 if (cmd
->comp_data
&& cmd
->comp_func
) {
795 cmd
->comp_func(port
, MTIP_TAG_INTERNAL
,
796 cmd
->comp_data
, PORT_IRQ_TF_ERR
);
798 goto handle_tfe_exit
;
801 /* clear the tag accumulator */
802 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
804 /* Loop through all the groups */
805 for (group
= 0; group
< dd
->slot_groups
; group
++) {
806 completed
= readl(port
->completed
[group
]);
808 /* clear completed status register in the hardware.*/
809 writel(completed
, port
->completed
[group
]);
811 /* Process successfully completed commands */
812 for (bit
= 0; bit
< 32 && completed
; bit
++) {
813 if (!(completed
& (1<<bit
)))
815 tag
= (group
<< 5) + bit
;
817 /* Skip the internal command slot */
818 if (tag
== MTIP_TAG_INTERNAL
)
821 cmd
= &port
->commands
[tag
];
822 if (likely(cmd
->comp_func
)) {
823 set_bit(tag
, tagaccum
);
825 atomic_set(&cmd
->active
, 0);
831 dev_err(&port
->dd
->pdev
->dev
,
832 "Missing completion func for tag %d",
834 if (mtip_check_surprise_removal(dd
->pdev
)) {
835 mtip_command_cleanup(dd
);
836 /* don't proceed further */
843 print_tags(dd
, "completed (TFE)", tagaccum
, cmd_cnt
);
845 /* Restart the port */
847 mtip_restart_port(port
);
849 /* Trying to determine the cause of the error */
850 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
852 dd
->port
->log_buf_dma
, 1);
854 dev_warn(&dd
->pdev
->dev
,
855 "Error in READ LOG EXT (10h) command\n");
856 /* non-critical error, don't fail the load */
858 buf
= (unsigned char *)dd
->port
->log_buf
;
859 if (buf
[259] & 0x1) {
860 dev_info(&dd
->pdev
->dev
,
861 "Write protect bit is set.\n");
862 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
863 fail_all_ncq_write
= 1;
864 fail_reason
= "write protect";
866 if (buf
[288] == 0xF7) {
867 dev_info(&dd
->pdev
->dev
,
868 "Exceeded Tmax, drive in thermal shutdown.\n");
869 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
870 fail_all_ncq_cmds
= 1;
871 fail_reason
= "thermal shutdown";
873 if (buf
[288] == 0xBF) {
874 dev_info(&dd
->pdev
->dev
,
875 "Drive indicates rebuild has failed.\n");
876 fail_all_ncq_cmds
= 1;
877 fail_reason
= "rebuild failed";
881 /* clear the tag accumulator */
882 memset(tagaccum
, 0, SLOTBITS_IN_LONGS
* sizeof(long));
884 /* Loop through all the groups */
885 for (group
= 0; group
< dd
->slot_groups
; group
++) {
886 for (bit
= 0; bit
< 32; bit
++) {
888 tag
= (group
<< 5) + bit
;
889 cmd
= &port
->commands
[tag
];
891 /* If the active bit is set re-issue the command */
892 if (atomic_read(&cmd
->active
) == 0)
895 fis
= (struct host_to_dev_fis
*)cmd
->command
;
897 /* Should re-issue? */
898 if (tag
== MTIP_TAG_INTERNAL
||
899 fis
->command
== ATA_CMD_SET_FEATURES
)
902 if (fail_all_ncq_cmds
||
903 (fail_all_ncq_write
&&
904 fis
->command
== ATA_CMD_FPDMA_WRITE
)) {
905 dev_warn(&dd
->pdev
->dev
,
906 " Fail: %s w/tag %d [%s].\n",
907 fis
->command
== ATA_CMD_FPDMA_WRITE
?
910 fail_reason
!= NULL
?
911 fail_reason
: "unknown");
912 atomic_set(&cmd
->active
, 0);
913 if (cmd
->comp_func
) {
914 cmd
->comp_func(port
, tag
,
923 * First check if this command has
924 * exceeded its retries.
926 if (reissue
&& (cmd
->retries
-- > 0)) {
928 set_bit(tag
, tagaccum
);
930 /* Re-issue the command. */
931 mtip_issue_ncq_command(port
, tag
);
936 /* Retire a command that will not be reissued */
937 dev_warn(&port
->dd
->pdev
->dev
,
938 "retiring tag %d\n", tag
);
939 atomic_set(&cmd
->active
, 0);
948 dev_warn(&port
->dd
->pdev
->dev
,
949 "Bad completion for tag %d\n",
953 print_tags(dd
, "reissued (TFE)", tagaccum
, cmd_cnt
);
956 /* clear eh_active */
957 clear_bit(MTIP_PF_EH_ACTIVE_BIT
, &port
->flags
);
958 wake_up_interruptible(&port
->svc_wait
);
960 mod_timer(&port
->cmd_timer
,
961 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
965 * Handle a set device bits interrupt
967 static inline void mtip_process_sdbf(struct driver_data
*dd
)
969 struct mtip_port
*port
= dd
->port
;
972 struct mtip_cmd
*command
;
974 /* walk all bits in all slot groups */
975 for (group
= 0; group
< dd
->slot_groups
; group
++) {
976 completed
= readl(port
->completed
[group
]);
980 /* clear completed status register in the hardware.*/
981 writel(completed
, port
->completed
[group
]);
983 /* Process completed commands. */
985 (bit
< 32) && completed
;
986 bit
++, completed
>>= 1) {
987 if (completed
& 0x01) {
988 tag
= (group
<< 5) | bit
;
990 /* skip internal command slot. */
991 if (unlikely(tag
== MTIP_TAG_INTERNAL
))
994 command
= &port
->commands
[tag
];
995 /* make internal callback */
996 if (likely(command
->comp_func
)) {
1003 dev_warn(&dd
->pdev
->dev
,
1008 if (mtip_check_surprise_removal(
1010 mtip_command_cleanup(dd
);
1020 * Process legacy pio and d2h interrupts
1022 static inline void mtip_process_legacy(struct driver_data
*dd
, u32 port_stat
)
1024 struct mtip_port
*port
= dd
->port
;
1025 struct mtip_cmd
*cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
1027 if (test_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
) &&
1028 (cmd
!= NULL
) && !(readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1029 & (1 << MTIP_TAG_INTERNAL
))) {
1030 if (cmd
->comp_func
) {
1031 cmd
->comp_func(port
,
1043 * Demux and handle errors
1045 static inline void mtip_process_errors(struct driver_data
*dd
, u32 port_stat
)
1047 if (likely(port_stat
& (PORT_IRQ_TF_ERR
| PORT_IRQ_IF_ERR
)))
1048 mtip_handle_tfe(dd
);
1050 if (unlikely(port_stat
& PORT_IRQ_CONNECT
)) {
1051 dev_warn(&dd
->pdev
->dev
,
1052 "Clearing PxSERR.DIAG.x\n");
1053 writel((1 << 26), dd
->port
->mmio
+ PORT_SCR_ERR
);
1056 if (unlikely(port_stat
& PORT_IRQ_PHYRDY
)) {
1057 dev_warn(&dd
->pdev
->dev
,
1058 "Clearing PxSERR.DIAG.n\n");
1059 writel((1 << 16), dd
->port
->mmio
+ PORT_SCR_ERR
);
1062 if (unlikely(port_stat
& ~PORT_IRQ_HANDLED
)) {
1063 dev_warn(&dd
->pdev
->dev
,
1064 "Port stat errors %x unhandled\n",
1065 (port_stat
& ~PORT_IRQ_HANDLED
));
1069 static inline irqreturn_t
mtip_handle_irq(struct driver_data
*data
)
1071 struct driver_data
*dd
= (struct driver_data
*) data
;
1072 struct mtip_port
*port
= dd
->port
;
1073 u32 hba_stat
, port_stat
;
1076 hba_stat
= readl(dd
->mmio
+ HOST_IRQ_STAT
);
1080 /* Acknowledge the interrupt status on the port.*/
1081 port_stat
= readl(port
->mmio
+ PORT_IRQ_STAT
);
1082 writel(port_stat
, port
->mmio
+ PORT_IRQ_STAT
);
1084 /* Demux port status */
1085 if (likely(port_stat
& PORT_IRQ_SDB_FIS
))
1086 mtip_process_sdbf(dd
);
1088 if (unlikely(port_stat
& PORT_IRQ_ERR
)) {
1089 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
1090 mtip_command_cleanup(dd
);
1091 /* don't proceed further */
1094 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1098 mtip_process_errors(dd
, port_stat
& PORT_IRQ_ERR
);
1101 if (unlikely(port_stat
& PORT_IRQ_LEGACY
))
1102 mtip_process_legacy(dd
, port_stat
& PORT_IRQ_LEGACY
);
1105 /* acknowledge interrupt */
1106 writel(hba_stat
, dd
->mmio
+ HOST_IRQ_STAT
);
1112 * Wrapper for mtip_handle_irq
1113 * (ignores return code)
1115 static void mtip_tasklet(unsigned long data
)
1117 mtip_handle_irq((struct driver_data
*) data
);
1121 * HBA interrupt subroutine.
1124 * @instance Pointer to the driver data structure.
1127 * IRQ_HANDLED A HBA interrupt was pending and handled.
1128 * IRQ_NONE This interrupt was not for the HBA.
1130 static irqreturn_t
mtip_irq_handler(int irq
, void *instance
)
1132 struct driver_data
*dd
= instance
;
1133 tasklet_schedule(&dd
->tasklet
);
1137 static void mtip_issue_non_ncq_command(struct mtip_port
*port
, int tag
)
1139 atomic_set(&port
->commands
[tag
].active
, 1);
1140 writel(1 << MTIP_TAG_BIT(tag
),
1141 port
->cmd_issue
[MTIP_TAG_INDEX(tag
)]);
1144 static bool mtip_pause_ncq(struct mtip_port
*port
,
1145 struct host_to_dev_fis
*fis
)
1147 struct host_to_dev_fis
*reply
;
1148 unsigned long task_file_data
;
1150 reply
= port
->rxfis
+ RX_FIS_D2H_REG
;
1151 task_file_data
= readl(port
->mmio
+PORT_TFDATA
);
1153 if (fis
->command
== ATA_CMD_SEC_ERASE_UNIT
)
1154 clear_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1156 if ((task_file_data
& 1))
1159 if (fis
->command
== ATA_CMD_SEC_ERASE_PREP
) {
1160 set_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1161 set_bit(MTIP_DDF_SEC_LOCK_BIT
, &port
->dd
->dd_flag
);
1162 port
->ic_pause_timer
= jiffies
;
1164 } else if ((fis
->command
== ATA_CMD_DOWNLOAD_MICRO
) &&
1165 (fis
->features
== 0x03)) {
1166 set_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1167 port
->ic_pause_timer
= jiffies
;
1169 } else if ((fis
->command
== ATA_CMD_SEC_ERASE_UNIT
) ||
1170 ((fis
->command
== 0xFC) &&
1171 (fis
->features
== 0x27 || fis
->features
== 0x72 ||
1172 fis
->features
== 0x62 || fis
->features
== 0x26))) {
1173 /* Com reset after secure erase or lowlevel format */
1174 mtip_restart_port(port
);
1182 * Wait for port to quiesce
1184 * @port Pointer to port data structure
1185 * @timeout Max duration to wait (ms)
1189 * -EBUSY Commands still active
1191 static int mtip_quiesce_io(struct mtip_port
*port
, unsigned long timeout
)
1195 unsigned int active
= 1;
1197 to
= jiffies
+ msecs_to_jiffies(timeout
);
1199 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
) &&
1200 test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
1202 continue; /* svc thd is actively issuing commands */
1204 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1207 * Ignore s_active bit 0 of array element 0.
1208 * This bit will always be set
1210 active
= readl(port
->s_active
[0]) & 0xFFFFFFFE;
1211 for (n
= 1; n
< port
->dd
->slot_groups
; n
++)
1212 active
|= readl(port
->s_active
[n
]);
1218 } while (time_before(jiffies
, to
));
1220 return active
? -EBUSY
: 0;
1224 * Execute an internal command and wait for the completion.
1226 * @port Pointer to the port data structure.
1227 * @fis Pointer to the FIS that describes the command.
1228 * @fis_len Length in WORDS of the FIS.
1229 * @buffer DMA accessible for command data.
1230 * @buf_len Length, in bytes, of the data buffer.
1231 * @opts Command header options, excluding the FIS length
1232 * and the number of PRD entries.
1233 * @timeout Time in ms to wait for the command to complete.
1236 * 0 Command completed successfully.
1237 * -EFAULT The buffer address is not correctly aligned.
1238 * -EBUSY Internal command or other IO in progress.
1239 * -EAGAIN Time out waiting for command to complete.
1241 static int mtip_exec_internal_command(struct mtip_port
*port
,
1242 struct host_to_dev_fis
*fis
,
1248 unsigned long timeout
)
1250 struct mtip_cmd_sg
*command_sg
;
1251 DECLARE_COMPLETION_ONSTACK(wait
);
1252 int rv
= 0, ready2go
= 1;
1253 struct mtip_cmd
*int_cmd
= &port
->commands
[MTIP_TAG_INTERNAL
];
1256 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
1257 if (buffer
& 0x00000007) {
1258 dev_err(&port
->dd
->pdev
->dev
,
1259 "SG buffer is not 8 byte aligned\n");
1263 to
= jiffies
+ msecs_to_jiffies(timeout
);
1265 ready2go
= !test_and_set_bit(MTIP_TAG_INTERNAL
,
1270 } while (time_before(jiffies
, to
));
1272 dev_warn(&port
->dd
->pdev
->dev
,
1273 "Internal cmd active. new cmd [%02X]\n", fis
->command
);
1276 set_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1277 port
->ic_pause_timer
= 0;
1279 if (fis
->command
== ATA_CMD_SEC_ERASE_UNIT
)
1280 clear_bit(MTIP_PF_SE_ACTIVE_BIT
, &port
->flags
);
1281 else if (fis
->command
== ATA_CMD_DOWNLOAD_MICRO
)
1282 clear_bit(MTIP_PF_DM_ACTIVE_BIT
, &port
->flags
);
1284 if (atomic
== GFP_KERNEL
) {
1285 if (fis
->command
!= ATA_CMD_STANDBYNOW1
) {
1286 /* wait for io to complete if non atomic */
1287 if (mtip_quiesce_io(port
, 5000) < 0) {
1288 dev_warn(&port
->dd
->pdev
->dev
,
1289 "Failed to quiesce IO\n");
1290 release_slot(port
, MTIP_TAG_INTERNAL
);
1291 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1292 wake_up_interruptible(&port
->svc_wait
);
1297 /* Set the completion function and data for the command. */
1298 int_cmd
->comp_data
= &wait
;
1299 int_cmd
->comp_func
= mtip_completion
;
1302 /* Clear completion - we're going to poll */
1303 int_cmd
->comp_data
= NULL
;
1304 int_cmd
->comp_func
= mtip_null_completion
;
1307 /* Copy the command to the command table */
1308 memcpy(int_cmd
->command
, fis
, fis_len
*4);
1310 /* Populate the SG list */
1311 int_cmd
->command_header
->opts
=
1312 __force_bit2int
cpu_to_le32(opts
| fis_len
);
1314 command_sg
= int_cmd
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1317 __force_bit2int
cpu_to_le32((buf_len
-1) & 0x3FFFFF);
1319 __force_bit2int
cpu_to_le32(buffer
& 0xFFFFFFFF);
1320 command_sg
->dba_upper
=
1321 __force_bit2int
cpu_to_le32((buffer
>> 16) >> 16);
1323 int_cmd
->command_header
->opts
|=
1324 __force_bit2int
cpu_to_le32((1 << 16));
1327 /* Populate the command header */
1328 int_cmd
->command_header
->byte_count
= 0;
1330 /* Issue the command to the hardware */
1331 mtip_issue_non_ncq_command(port
, MTIP_TAG_INTERNAL
);
1333 /* Poll if atomic, wait_for_completion otherwise */
1334 if (atomic
== GFP_KERNEL
) {
1335 /* Wait for the command to complete or timeout. */
1336 if (wait_for_completion_timeout(
1338 msecs_to_jiffies(timeout
)) == 0) {
1339 dev_err(&port
->dd
->pdev
->dev
,
1340 "Internal command did not complete [%d] "
1341 "within timeout of %lu ms\n",
1343 if (mtip_check_surprise_removal(port
->dd
->pdev
) ||
1344 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1345 &port
->dd
->dd_flag
)) {
1352 /* Spin for <timeout> checking if command still outstanding */
1353 timeout
= jiffies
+ msecs_to_jiffies(timeout
);
1354 while ((readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1355 & (1 << MTIP_TAG_INTERNAL
))
1356 && time_before(jiffies
, timeout
)) {
1357 if (mtip_check_surprise_removal(port
->dd
->pdev
)) {
1361 if ((fis
->command
!= ATA_CMD_STANDBYNOW1
) &&
1362 test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1363 &port
->dd
->dd_flag
)) {
1367 if (readl(port
->mmio
+ PORT_IRQ_STAT
) & PORT_IRQ_ERR
) {
1368 atomic_inc(&int_cmd
->active
); /* error */
1374 if (atomic_read(&int_cmd
->active
) > 1) {
1375 dev_err(&port
->dd
->pdev
->dev
,
1376 "Internal command [%02X] failed\n", fis
->command
);
1379 if (readl(port
->cmd_issue
[MTIP_TAG_INTERNAL
])
1380 & (1 << MTIP_TAG_INTERNAL
)) {
1382 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
1383 &port
->dd
->dd_flag
)) {
1384 mtip_restart_port(port
);
1389 /* Clear the allocated and active bits for the internal command. */
1390 atomic_set(&int_cmd
->active
, 0);
1391 release_slot(port
, MTIP_TAG_INTERNAL
);
1392 if (rv
>= 0 && mtip_pause_ncq(port
, fis
)) {
1396 clear_bit(MTIP_PF_IC_ACTIVE_BIT
, &port
->flags
);
1397 wake_up_interruptible(&port
->svc_wait
);
1403 * Byte-swap ATA ID strings.
1405 * ATA identify data contains strings in byte-swapped 16-bit words.
1406 * They must be swapped (on all architectures) to be usable as C strings.
1407 * This function swaps bytes in-place.
1409 * @buf The buffer location of the string
1410 * @len The number of bytes to swap
1415 static inline void ata_swap_string(u16
*buf
, unsigned int len
)
1418 for (i
= 0; i
< (len
/2); i
++)
1419 be16_to_cpus(&buf
[i
]);
1423 * Request the device identity information.
1425 * If a user space buffer is not specified, i.e. is NULL, the
1426 * identify information is still read from the drive and placed
1427 * into the identify data buffer (@e port->identify) in the
1428 * port data structure.
1429 * When the identify buffer contains valid identify information @e
1430 * port->identify_valid is non-zero.
1432 * @port Pointer to the port structure.
1433 * @user_buffer A user space buffer where the identify data should be
1437 * 0 Command completed successfully.
1438 * -EFAULT An error occurred while coping data to the user buffer.
1439 * -1 Command failed.
1441 static int mtip_get_identify(struct mtip_port
*port
, void __user
*user_buffer
)
1444 struct host_to_dev_fis fis
;
1446 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &port
->dd
->dd_flag
))
1449 /* Build the FIS. */
1450 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1453 fis
.command
= ATA_CMD_ID_ATA
;
1455 /* Set the identify information as invalid. */
1456 port
->identify_valid
= 0;
1458 /* Clear the identify information. */
1459 memset(port
->identify
, 0, sizeof(u16
) * ATA_ID_WORDS
);
1461 /* Execute the command. */
1462 if (mtip_exec_internal_command(port
,
1466 sizeof(u16
) * ATA_ID_WORDS
,
1469 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
)
1476 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1477 * perform field-sensitive swapping on the string fields.
1478 * See the kernel use of ata_id_string() for proof of this.
1480 #ifdef __LITTLE_ENDIAN
1481 ata_swap_string(port
->identify
+ 27, 40); /* model string*/
1482 ata_swap_string(port
->identify
+ 23, 8); /* firmware string*/
1483 ata_swap_string(port
->identify
+ 10, 20); /* serial# string*/
1487 for (i
= 0; i
< ATA_ID_WORDS
; i
++)
1488 port
->identify
[i
] = le16_to_cpu(port
->identify
[i
]);
1492 /* Set the identify buffer as valid. */
1493 port
->identify_valid
= 1;
1499 ATA_ID_WORDS
* sizeof(u16
))) {
1510 * Issue a standby immediate command to the device.
1512 * @port Pointer to the port structure.
1515 * 0 Command was executed successfully.
1516 * -1 An error occurred while executing the command.
1518 static int mtip_standby_immediate(struct mtip_port
*port
)
1521 struct host_to_dev_fis fis
;
1522 unsigned long start
;
1524 /* Build the FIS. */
1525 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1528 fis
.command
= ATA_CMD_STANDBYNOW1
;
1531 rv
= mtip_exec_internal_command(port
,
1539 dbg_printk(MTIP_DRV_NAME
"Time taken to complete standby cmd: %d ms\n",
1540 jiffies_to_msecs(jiffies
- start
));
1542 dev_warn(&port
->dd
->pdev
->dev
,
1543 "STANDBY IMMEDIATE command failed.\n");
1549 * Issue a READ LOG EXT command to the device.
1551 * @port pointer to the port structure.
1552 * @page page number to fetch
1553 * @buffer pointer to buffer
1554 * @buffer_dma dma address corresponding to @buffer
1555 * @sectors page length to fetch, in sectors
1558 * @rv return value from mtip_exec_internal_command()
1560 static int mtip_read_log_page(struct mtip_port
*port
, u8 page
, u16
*buffer
,
1561 dma_addr_t buffer_dma
, unsigned int sectors
)
1563 struct host_to_dev_fis fis
;
1565 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1568 fis
.command
= ATA_CMD_READ_LOG_EXT
;
1569 fis
.sect_count
= sectors
& 0xFF;
1570 fis
.sect_cnt_ex
= (sectors
>> 8) & 0xFF;
1573 fis
.device
= ATA_DEVICE_OBS
;
1575 memset(buffer
, 0, sectors
* ATA_SECT_SIZE
);
1577 return mtip_exec_internal_command(port
,
1581 sectors
* ATA_SECT_SIZE
,
1584 MTIP_INTERNAL_COMMAND_TIMEOUT_MS
);
1588 * Issue a SMART READ DATA command to the device.
1590 * @port pointer to the port structure.
1591 * @buffer pointer to buffer
1592 * @buffer_dma dma address corresponding to @buffer
1595 * @rv return value from mtip_exec_internal_command()
1597 static int mtip_get_smart_data(struct mtip_port
*port
, u8
*buffer
,
1598 dma_addr_t buffer_dma
)
1600 struct host_to_dev_fis fis
;
1602 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1605 fis
.command
= ATA_CMD_SMART
;
1606 fis
.features
= 0xD0;
1610 fis
.device
= ATA_DEVICE_OBS
;
1612 return mtip_exec_internal_command(port
,
1623 * Get the value of a smart attribute
1625 * @port pointer to the port structure
1626 * @id attribute number
1627 * @attrib pointer to return attrib information corresponding to @id
1630 * -EINVAL NULL buffer passed or unsupported attribute @id.
1631 * -EPERM Identify data not valid, SMART not supported or not enabled
1633 static int mtip_get_smart_attr(struct mtip_port
*port
, unsigned int id
,
1634 struct smart_attr
*attrib
)
1637 struct smart_attr
*pattr
;
1642 if (!port
->identify_valid
) {
1643 dev_warn(&port
->dd
->pdev
->dev
, "IDENTIFY DATA not valid\n");
1646 if (!(port
->identify
[82] & 0x1)) {
1647 dev_warn(&port
->dd
->pdev
->dev
, "SMART not supported\n");
1650 if (!(port
->identify
[85] & 0x1)) {
1651 dev_warn(&port
->dd
->pdev
->dev
, "SMART not enabled\n");
1655 memset(port
->smart_buf
, 0, ATA_SECT_SIZE
);
1656 rv
= mtip_get_smart_data(port
, port
->smart_buf
, port
->smart_buf_dma
);
1658 dev_warn(&port
->dd
->pdev
->dev
, "Failed to ge SMART data\n");
1662 pattr
= (struct smart_attr
*)(port
->smart_buf
+ 2);
1663 for (i
= 0; i
< 29; i
++, pattr
++)
1664 if (pattr
->attr_id
== id
) {
1665 memcpy(attrib
, pattr
, sizeof(struct smart_attr
));
1670 dev_warn(&port
->dd
->pdev
->dev
,
1671 "Query for invalid SMART attribute ID\n");
1679 * Get the drive capacity.
1681 * @dd Pointer to the device data structure.
1682 * @sectors Pointer to the variable that will receive the sector count.
1685 * 1 Capacity was returned successfully.
1686 * 0 The identify information is invalid.
1688 static bool mtip_hw_get_capacity(struct driver_data
*dd
, sector_t
*sectors
)
1690 struct mtip_port
*port
= dd
->port
;
1691 u64 total
, raw0
, raw1
, raw2
, raw3
;
1692 raw0
= port
->identify
[100];
1693 raw1
= port
->identify
[101];
1694 raw2
= port
->identify
[102];
1695 raw3
= port
->identify
[103];
1696 total
= raw0
| raw1
<<16 | raw2
<<32 | raw3
<<48;
1698 return (bool) !!port
->identify_valid
;
1704 * Resets the HBA by setting the HBA Reset bit in the Global
1705 * HBA Control register. After setting the HBA Reset bit the
1706 * function waits for 1 second before reading the HBA Reset
1707 * bit to make sure it has cleared. If HBA Reset is not clear
1708 * an error is returned. Cannot be used in non-blockable
1711 * @dd Pointer to the driver data structure.
1714 * 0 The reset was successful.
1715 * -1 The HBA Reset bit did not clear.
1717 static int mtip_hba_reset(struct driver_data
*dd
)
1719 mtip_deinit_port(dd
->port
);
1721 /* Set the reset bit */
1722 writel(HOST_RESET
, dd
->mmio
+ HOST_CTL
);
1725 readl(dd
->mmio
+ HOST_CTL
);
1727 /* Wait for reset to clear */
1730 /* Check the bit has cleared */
1731 if (readl(dd
->mmio
+ HOST_CTL
) & HOST_RESET
) {
1732 dev_err(&dd
->pdev
->dev
,
1733 "Reset bit did not clear.\n");
1741 * Display the identify command data.
1743 * @port Pointer to the port data structure.
1748 static void mtip_dump_identify(struct mtip_port
*port
)
1751 unsigned short revid
;
1754 if (!port
->identify_valid
)
1757 strlcpy(cbuf
, (char *)(port
->identify
+10), 21);
1758 dev_info(&port
->dd
->pdev
->dev
,
1759 "Serial No.: %s\n", cbuf
);
1761 strlcpy(cbuf
, (char *)(port
->identify
+23), 9);
1762 dev_info(&port
->dd
->pdev
->dev
,
1763 "Firmware Ver.: %s\n", cbuf
);
1765 strlcpy(cbuf
, (char *)(port
->identify
+27), 41);
1766 dev_info(&port
->dd
->pdev
->dev
, "Model: %s\n", cbuf
);
1768 if (mtip_hw_get_capacity(port
->dd
, §ors
))
1769 dev_info(&port
->dd
->pdev
->dev
,
1770 "Capacity: %llu sectors (%llu MB)\n",
1772 ((u64
)sectors
) * ATA_SECT_SIZE
>> 20);
1774 pci_read_config_word(port
->dd
->pdev
, PCI_REVISION_ID
, &revid
);
1775 switch (revid
& 0xFF) {
1777 strlcpy(cbuf
, "A0", 3);
1780 strlcpy(cbuf
, "A2", 3);
1783 strlcpy(cbuf
, "?", 2);
1786 dev_info(&port
->dd
->pdev
->dev
,
1787 "Card Type: %s\n", cbuf
);
1791 * Map the commands scatter list into the command table.
1793 * @command Pointer to the command.
1794 * @nents Number of scatter list entries.
1799 static inline void fill_command_sg(struct driver_data
*dd
,
1800 struct mtip_cmd
*command
,
1804 unsigned int dma_len
;
1805 struct mtip_cmd_sg
*command_sg
;
1806 struct scatterlist
*sg
= command
->sg
;
1808 command_sg
= command
->command
+ AHCI_CMD_TBL_HDR_SZ
;
1810 for (n
= 0; n
< nents
; n
++) {
1811 dma_len
= sg_dma_len(sg
);
1812 if (dma_len
> 0x400000)
1813 dev_err(&dd
->pdev
->dev
,
1814 "DMA segment length truncated\n");
1815 command_sg
->info
= __force_bit2int
1816 cpu_to_le32((dma_len
-1) & 0x3FFFFF);
1817 command_sg
->dba
= __force_bit2int
1818 cpu_to_le32(sg_dma_address(sg
));
1819 command_sg
->dba_upper
= __force_bit2int
1820 cpu_to_le32((sg_dma_address(sg
) >> 16) >> 16);
1827 * @brief Execute a drive command.
1829 * return value 0 The command completed successfully.
1830 * return value -1 An error occurred while executing the command.
1832 static int exec_drive_task(struct mtip_port
*port
, u8
*command
)
1834 struct host_to_dev_fis fis
;
1835 struct host_to_dev_fis
*reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1837 /* Build the FIS. */
1838 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1841 fis
.command
= command
[0];
1842 fis
.features
= command
[1];
1843 fis
.sect_count
= command
[2];
1844 fis
.sector
= command
[3];
1845 fis
.cyl_low
= command
[4];
1846 fis
.cyl_hi
= command
[5];
1847 fis
.device
= command
[6] & ~0x10; /* Clear the dev bit*/
1849 dbg_printk(MTIP_DRV_NAME
" %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
1859 /* Execute the command. */
1860 if (mtip_exec_internal_command(port
,
1867 MTIP_IOCTL_COMMAND_TIMEOUT_MS
) < 0) {
1871 command
[0] = reply
->command
; /* Status*/
1872 command
[1] = reply
->features
; /* Error*/
1873 command
[4] = reply
->cyl_low
;
1874 command
[5] = reply
->cyl_hi
;
1876 dbg_printk(MTIP_DRV_NAME
" %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
1887 * @brief Execute a drive command.
1889 * @param port Pointer to the port data structure.
1890 * @param command Pointer to the user specified command parameters.
1891 * @param user_buffer Pointer to the user space buffer where read sector
1892 * data should be copied.
1894 * return value 0 The command completed successfully.
1895 * return value -EFAULT An error occurred while copying the completion
1896 * data to the user space buffer.
1897 * return value -1 An error occurred while executing the command.
1899 static int exec_drive_command(struct mtip_port
*port
, u8
*command
,
1900 void __user
*user_buffer
)
1902 struct host_to_dev_fis fis
;
1903 struct host_to_dev_fis
*reply
;
1905 dma_addr_t dma_addr
= 0;
1906 int rv
= 0, xfer_sz
= command
[3];
1912 buf
= dmam_alloc_coherent(&port
->dd
->pdev
->dev
,
1913 ATA_SECT_SIZE
* xfer_sz
,
1917 dev_err(&port
->dd
->pdev
->dev
,
1918 "Memory allocation failed (%d bytes)\n",
1919 ATA_SECT_SIZE
* xfer_sz
);
1922 memset(buf
, 0, ATA_SECT_SIZE
* xfer_sz
);
1925 /* Build the FIS. */
1926 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
1929 fis
.command
= command
[0];
1930 fis
.features
= command
[2];
1931 fis
.sect_count
= command
[3];
1932 if (fis
.command
== ATA_CMD_SMART
) {
1933 fis
.sector
= command
[1];
1939 reply
= (port
->rxfis
+ RX_FIS_PIO_SETUP
);
1941 reply
= (port
->rxfis
+ RX_FIS_D2H_REG
);
1943 dbg_printk(MTIP_DRV_NAME
1944 " %s: User Command: cmd %x, sect %x, "
1945 "feat %x, sectcnt %x\n",
1952 /* Execute the command. */
1953 if (mtip_exec_internal_command(port
,
1956 (xfer_sz
? dma_addr
: 0),
1957 (xfer_sz
? ATA_SECT_SIZE
* xfer_sz
: 0),
1960 MTIP_IOCTL_COMMAND_TIMEOUT_MS
)
1963 goto exit_drive_command
;
1966 /* Collect the completion status. */
1967 command
[0] = reply
->command
; /* Status*/
1968 command
[1] = reply
->features
; /* Error*/
1969 command
[2] = reply
->sect_count
;
1971 dbg_printk(MTIP_DRV_NAME
1972 " %s: Completion Status: stat %x, "
1973 "err %x, nsect %x\n",
1980 if (copy_to_user(user_buffer
,
1982 ATA_SECT_SIZE
* command
[3])) {
1984 goto exit_drive_command
;
1989 dmam_free_coherent(&port
->dd
->pdev
->dev
,
1990 ATA_SECT_SIZE
* xfer_sz
, buf
, dma_addr
);
1995 * Indicates whether a command has a single sector payload.
1997 * @command passed to the device to perform the certain event.
1998 * @features passed to the device to perform the certain event.
2001 * 1 command is one that always has a single sector payload,
2002 * regardless of the value in the Sector Count field.
2006 static unsigned int implicit_sector(unsigned char command
,
2007 unsigned char features
)
2009 unsigned int rv
= 0;
2011 /* list of commands that have an implicit sector count of 1 */
2013 case ATA_CMD_SEC_SET_PASS
:
2014 case ATA_CMD_SEC_UNLOCK
:
2015 case ATA_CMD_SEC_ERASE_PREP
:
2016 case ATA_CMD_SEC_ERASE_UNIT
:
2017 case ATA_CMD_SEC_FREEZE_LOCK
:
2018 case ATA_CMD_SEC_DISABLE_PASS
:
2019 case ATA_CMD_PMP_READ
:
2020 case ATA_CMD_PMP_WRITE
:
2023 case ATA_CMD_SET_MAX
:
2024 if (features
== ATA_SET_MAX_UNLOCK
)
2028 if ((features
== ATA_SMART_READ_VALUES
) ||
2029 (features
== ATA_SMART_READ_THRESHOLDS
))
2032 case ATA_CMD_CONF_OVERLAY
:
2033 if ((features
== ATA_DCO_IDENTIFY
) ||
2034 (features
== ATA_DCO_SET
))
2040 static void mtip_set_timeout(struct driver_data
*dd
,
2041 struct host_to_dev_fis
*fis
,
2042 unsigned int *timeout
, u8 erasemode
)
2044 switch (fis
->command
) {
2045 case ATA_CMD_DOWNLOAD_MICRO
:
2046 *timeout
= 120000; /* 2 minutes */
2048 case ATA_CMD_SEC_ERASE_UNIT
:
2051 *timeout
= ((*(dd
->port
->identify
+ 90) * 2) * 60000);
2053 *timeout
= ((*(dd
->port
->identify
+ 89) * 2) * 60000);
2055 case ATA_CMD_STANDBYNOW1
:
2056 *timeout
= 120000; /* 2 minutes */
2060 *timeout
= 60000; /* 60 seconds */
2063 *timeout
= 15000; /* 15 seconds */
2066 *timeout
= MTIP_IOCTL_COMMAND_TIMEOUT_MS
;
2072 * Executes a taskfile
2073 * See ide_taskfile_ioctl() for derivation
2075 static int exec_drive_taskfile(struct driver_data
*dd
,
2077 ide_task_request_t
*req_task
,
2080 struct host_to_dev_fis fis
;
2081 struct host_to_dev_fis
*reply
;
2084 dma_addr_t outbuf_dma
= 0;
2085 dma_addr_t inbuf_dma
= 0;
2086 dma_addr_t dma_buffer
= 0;
2088 unsigned int taskin
= 0;
2089 unsigned int taskout
= 0;
2091 unsigned int timeout
;
2092 unsigned int force_single_sector
;
2093 unsigned int transfer_size
;
2094 unsigned long task_file_data
;
2095 int intotal
= outtotal
+ req_task
->out_size
;
2098 taskout
= req_task
->out_size
;
2099 taskin
= req_task
->in_size
;
2100 /* 130560 = 512 * 0xFF*/
2101 if (taskin
> 130560 || taskout
> 130560) {
2107 outbuf
= kzalloc(taskout
, GFP_KERNEL
);
2108 if (outbuf
== NULL
) {
2112 if (copy_from_user(outbuf
, buf
+ outtotal
, taskout
)) {
2116 outbuf_dma
= pci_map_single(dd
->pdev
,
2120 if (outbuf_dma
== 0) {
2124 dma_buffer
= outbuf_dma
;
2128 inbuf
= kzalloc(taskin
, GFP_KERNEL
);
2129 if (inbuf
== NULL
) {
2134 if (copy_from_user(inbuf
, buf
+ intotal
, taskin
)) {
2138 inbuf_dma
= pci_map_single(dd
->pdev
,
2140 taskin
, DMA_FROM_DEVICE
);
2141 if (inbuf_dma
== 0) {
2145 dma_buffer
= inbuf_dma
;
2148 /* only supports PIO and non-data commands from this ioctl. */
2149 switch (req_task
->data_phase
) {
2151 nsect
= taskout
/ ATA_SECT_SIZE
;
2152 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2155 reply
= (dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
);
2157 case TASKFILE_NO_DATA
:
2158 reply
= (dd
->port
->rxfis
+ RX_FIS_D2H_REG
);
2165 /* Build the FIS. */
2166 memset(&fis
, 0, sizeof(struct host_to_dev_fis
));
2170 fis
.command
= req_task
->io_ports
[7];
2171 fis
.features
= req_task
->io_ports
[1];
2172 fis
.sect_count
= req_task
->io_ports
[2];
2173 fis
.lba_low
= req_task
->io_ports
[3];
2174 fis
.lba_mid
= req_task
->io_ports
[4];
2175 fis
.lba_hi
= req_task
->io_ports
[5];
2176 /* Clear the dev bit*/
2177 fis
.device
= req_task
->io_ports
[6] & ~0x10;
2179 if ((req_task
->in_flags
.all
== 0) && (req_task
->out_flags
.all
& 1)) {
2180 req_task
->in_flags
.all
=
2181 IDE_TASKFILE_STD_IN_FLAGS
|
2182 (IDE_HOB_STD_IN_FLAGS
<< 8);
2183 fis
.lba_low_ex
= req_task
->hob_ports
[3];
2184 fis
.lba_mid_ex
= req_task
->hob_ports
[4];
2185 fis
.lba_hi_ex
= req_task
->hob_ports
[5];
2186 fis
.features_ex
= req_task
->hob_ports
[1];
2187 fis
.sect_cnt_ex
= req_task
->hob_ports
[2];
2190 req_task
->in_flags
.all
= IDE_TASKFILE_STD_IN_FLAGS
;
2193 force_single_sector
= implicit_sector(fis
.command
, fis
.features
);
2195 if ((taskin
|| taskout
) && (!fis
.sect_count
)) {
2197 fis
.sect_count
= nsect
;
2199 if (!force_single_sector
) {
2200 dev_warn(&dd
->pdev
->dev
,
2201 "data movement but "
2202 "sect_count is 0\n");
2209 dbg_printk(MTIP_DRV_NAME
2210 " %s: cmd %x, feat %x, nsect %x,"
2211 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
2222 /* check for erase mode support during secure erase.*/
2223 if ((fis
.command
== ATA_CMD_SEC_ERASE_UNIT
) && outbuf
&&
2224 (outbuf
[0] & MTIP_SEC_ERASE_MODE
)) {
2228 mtip_set_timeout(dd
, &fis
, &timeout
, erasemode
);
2230 /* Determine the correct transfer size.*/
2231 if (force_single_sector
)
2232 transfer_size
= ATA_SECT_SIZE
;
2234 transfer_size
= ATA_SECT_SIZE
* fis
.sect_count
;
2236 /* Execute the command.*/
2237 if (mtip_exec_internal_command(dd
->port
,
2249 task_file_data
= readl(dd
->port
->mmio
+PORT_TFDATA
);
2251 if ((req_task
->data_phase
== TASKFILE_IN
) && !(task_file_data
& 1)) {
2252 reply
= dd
->port
->rxfis
+ RX_FIS_PIO_SETUP
;
2253 req_task
->io_ports
[7] = reply
->control
;
2255 reply
= dd
->port
->rxfis
+ RX_FIS_D2H_REG
;
2256 req_task
->io_ports
[7] = reply
->command
;
2259 /* reclaim the DMA buffers.*/
2261 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2262 taskin
, DMA_FROM_DEVICE
);
2264 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2265 taskout
, DMA_TO_DEVICE
);
2269 /* return the ATA registers to the caller.*/
2270 req_task
->io_ports
[1] = reply
->features
;
2271 req_task
->io_ports
[2] = reply
->sect_count
;
2272 req_task
->io_ports
[3] = reply
->lba_low
;
2273 req_task
->io_ports
[4] = reply
->lba_mid
;
2274 req_task
->io_ports
[5] = reply
->lba_hi
;
2275 req_task
->io_ports
[6] = reply
->device
;
2277 if (req_task
->out_flags
.all
& 1) {
2279 req_task
->hob_ports
[3] = reply
->lba_low_ex
;
2280 req_task
->hob_ports
[4] = reply
->lba_mid_ex
;
2281 req_task
->hob_ports
[5] = reply
->lba_hi_ex
;
2282 req_task
->hob_ports
[1] = reply
->features_ex
;
2283 req_task
->hob_ports
[2] = reply
->sect_cnt_ex
;
2285 dbg_printk(MTIP_DRV_NAME
2286 " %s: Completion: stat %x,"
2287 "err %x, sect_cnt %x, lbalo %x,"
2288 "lbamid %x, lbahi %x, dev %x\n",
2290 req_task
->io_ports
[7],
2291 req_task
->io_ports
[1],
2292 req_task
->io_ports
[2],
2293 req_task
->io_ports
[3],
2294 req_task
->io_ports
[4],
2295 req_task
->io_ports
[5],
2296 req_task
->io_ports
[6]);
2299 if (copy_to_user(buf
+ outtotal
, outbuf
, taskout
)) {
2305 if (copy_to_user(buf
+ intotal
, inbuf
, taskin
)) {
2312 pci_unmap_single(dd
->pdev
, inbuf_dma
,
2313 taskin
, DMA_FROM_DEVICE
);
2315 pci_unmap_single(dd
->pdev
, outbuf_dma
,
2316 taskout
, DMA_TO_DEVICE
);
2324 * Handle IOCTL calls from the Block Layer.
2326 * This function is called by the Block Layer when it receives an IOCTL
2327 * command that it does not understand. If the IOCTL command is not supported
2328 * this function returns -ENOTTY.
2330 * @dd Pointer to the driver data structure.
2331 * @cmd IOCTL command passed from the Block Layer.
2332 * @arg IOCTL argument passed from the Block Layer.
2335 * 0 The IOCTL completed successfully.
2336 * -ENOTTY The specified command is not supported.
2337 * -EFAULT An error occurred copying data to a user space buffer.
2338 * -EIO An error occurred while executing the command.
2340 static int mtip_hw_ioctl(struct driver_data
*dd
, unsigned int cmd
,
2344 case HDIO_GET_IDENTITY
:
2346 if (copy_to_user((void __user
*)arg
, dd
->port
->identify
,
2347 sizeof(u16
) * ATA_ID_WORDS
))
2351 case HDIO_DRIVE_CMD
:
2353 u8 drive_command
[4];
2355 /* Copy the user command info to our buffer. */
2356 if (copy_from_user(drive_command
,
2357 (void __user
*) arg
,
2358 sizeof(drive_command
)))
2361 /* Execute the drive command. */
2362 if (exec_drive_command(dd
->port
,
2364 (void __user
*) (arg
+4)))
2367 /* Copy the status back to the users buffer. */
2368 if (copy_to_user((void __user
*) arg
,
2370 sizeof(drive_command
)))
2375 case HDIO_DRIVE_TASK
:
2377 u8 drive_command
[7];
2379 /* Copy the user command info to our buffer. */
2380 if (copy_from_user(drive_command
,
2381 (void __user
*) arg
,
2382 sizeof(drive_command
)))
2385 /* Execute the drive command. */
2386 if (exec_drive_task(dd
->port
, drive_command
))
2389 /* Copy the status back to the users buffer. */
2390 if (copy_to_user((void __user
*) arg
,
2392 sizeof(drive_command
)))
2397 case HDIO_DRIVE_TASKFILE
: {
2398 ide_task_request_t req_task
;
2401 if (copy_from_user(&req_task
, (void __user
*) arg
,
2405 outtotal
= sizeof(req_task
);
2407 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
2408 &req_task
, outtotal
);
2410 if (copy_to_user((void __user
*) arg
, &req_task
,
2424 * Submit an IO to the hw
2426 * This function is called by the block layer to issue an io
2427 * to the device. Upon completion, the callback function will
2428 * be called with the data parameter passed as the callback data.
2430 * @dd Pointer to the driver data structure.
2431 * @start First sector to read.
2432 * @nsect Number of sectors to read.
2433 * @nents Number of entries in scatter list for the read command.
2434 * @tag The tag of this read command.
2435 * @callback Pointer to the function that should be called
2436 * when the read completes.
2437 * @data Callback data passed to the callback function
2438 * when the read completes.
2439 * @dir Direction (read or write)
2444 static void mtip_hw_submit_io(struct driver_data
*dd
, sector_t sector
,
2445 int nsect
, int nents
, int tag
, void *callback
,
2446 void *data
, int dir
)
2448 struct host_to_dev_fis
*fis
;
2449 struct mtip_port
*port
= dd
->port
;
2450 struct mtip_cmd
*command
= &port
->commands
[tag
];
2451 int dma_dir
= (dir
== READ
) ? DMA_FROM_DEVICE
: DMA_TO_DEVICE
;
2454 /* Map the scatter list for DMA access */
2455 nents
= dma_map_sg(&dd
->pdev
->dev
, command
->sg
, nents
, dma_dir
);
2457 command
->scatter_ents
= nents
;
2460 * The number of retries for this command before it is
2461 * reported as a failure to the upper layers.
2463 command
->retries
= MTIP_MAX_RETRIES
;
2466 fis
= command
->command
;
2470 (dir
== READ
? ATA_CMD_FPDMA_READ
: ATA_CMD_FPDMA_WRITE
);
2471 fis
->lba_low
= start
& 0xFF;
2472 fis
->lba_mid
= (start
>> 8) & 0xFF;
2473 fis
->lba_hi
= (start
>> 16) & 0xFF;
2474 fis
->lba_low_ex
= (start
>> 24) & 0xFF;
2475 fis
->lba_mid_ex
= (start
>> 32) & 0xFF;
2476 fis
->lba_hi_ex
= (start
>> 40) & 0xFF;
2477 fis
->device
= 1 << 6;
2478 fis
->features
= nsect
& 0xFF;
2479 fis
->features_ex
= (nsect
>> 8) & 0xFF;
2480 fis
->sect_count
= ((tag
<< 3) | (tag
>> 5));
2481 fis
->sect_cnt_ex
= 0;
2485 fill_command_sg(dd
, command
, nents
);
2487 /* Populate the command header */
2488 command
->command_header
->opts
=
2489 __force_bit2int
cpu_to_le32(
2490 (nents
<< 16) | 5 | AHCI_CMD_PREFETCH
);
2491 command
->command_header
->byte_count
= 0;
2494 * Set the completion function and data for the command
2495 * within this layer.
2497 command
->comp_data
= dd
;
2498 command
->comp_func
= mtip_async_complete
;
2499 command
->direction
= dma_dir
;
2502 * Set the completion function and data for the command passed
2503 * from the upper layer.
2505 command
->async_data
= data
;
2506 command
->async_callback
= callback
;
2509 * To prevent this command from being issued
2510 * if an internal command is in progress or error handling is active.
2512 if (port
->flags
& MTIP_PF_PAUSE_IO
) {
2513 set_bit(tag
, port
->cmds_to_issue
);
2514 set_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2518 /* Issue the command to the hardware */
2519 mtip_issue_ncq_command(port
, tag
);
2525 * Release a command slot.
2527 * @dd Pointer to the driver data structure.
2533 static void mtip_hw_release_scatterlist(struct driver_data
*dd
, int tag
)
2535 release_slot(dd
->port
, tag
);
2539 * Obtain a command slot and return its associated scatter list.
2541 * @dd Pointer to the driver data structure.
2542 * @tag Pointer to an int that will receive the allocated command
2546 * Pointer to the scatter list for the allocated command slot
2547 * or NULL if no command slots are available.
2549 static struct scatterlist
*mtip_hw_get_scatterlist(struct driver_data
*dd
,
2553 * It is possible that, even with this semaphore, a thread
2554 * may think that no command slots are available. Therefore, we
2555 * need to make an attempt to get_slot().
2557 down(&dd
->port
->cmd_slot
);
2558 *tag
= get_slot(dd
->port
);
2560 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
2561 up(&dd
->port
->cmd_slot
);
2564 if (unlikely(*tag
< 0)) {
2565 up(&dd
->port
->cmd_slot
);
2569 return dd
->port
->commands
[*tag
].sg
;
2573 * Sysfs status dump.
2575 * @dev Pointer to the device structure, passed by the kernrel.
2576 * @attr Pointer to the device_attribute structure passed by the kernel.
2577 * @buf Pointer to the char buffer that will receive the stats info.
2580 * The size, in bytes, of the data copied into buf.
2582 static ssize_t
mtip_hw_show_status(struct device
*dev
,
2583 struct device_attribute
*attr
,
2586 struct driver_data
*dd
= dev_to_disk(dev
)->private_data
;
2589 if (test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))
2590 size
+= sprintf(buf
, "%s", "thermal_shutdown\n");
2591 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
))
2592 size
+= sprintf(buf
, "%s", "write_protect\n");
2594 size
+= sprintf(buf
, "%s", "online\n");
2599 static DEVICE_ATTR(status
, S_IRUGO
, mtip_hw_show_status
, NULL
);
2601 static ssize_t
mtip_hw_read_registers(struct file
*f
, char __user
*ubuf
,
2602 size_t len
, loff_t
*offset
)
2604 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2605 char buf
[MTIP_DFS_MAX_BUF_SIZE
];
2606 u32 group_allocated
;
2613 size
+= sprintf(&buf
[size
], "H/ S ACTive : [ 0x");
2615 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2616 size
+= sprintf(&buf
[size
], "%08X ",
2617 readl(dd
->port
->s_active
[n
]));
2619 size
+= sprintf(&buf
[size
], "]\n");
2620 size
+= sprintf(&buf
[size
], "H/ Command Issue : [ 0x");
2622 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2623 size
+= sprintf(&buf
[size
], "%08X ",
2624 readl(dd
->port
->cmd_issue
[n
]));
2626 size
+= sprintf(&buf
[size
], "]\n");
2627 size
+= sprintf(&buf
[size
], "H/ Completed : [ 0x");
2629 for (n
= dd
->slot_groups
-1; n
>= 0; n
--)
2630 size
+= sprintf(&buf
[size
], "%08X ",
2631 readl(dd
->port
->completed
[n
]));
2633 size
+= sprintf(&buf
[size
], "]\n");
2634 size
+= sprintf(&buf
[size
], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
2635 readl(dd
->port
->mmio
+ PORT_IRQ_STAT
));
2636 size
+= sprintf(&buf
[size
], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
2637 readl(dd
->mmio
+ HOST_IRQ_STAT
));
2638 size
+= sprintf(&buf
[size
], "\n");
2640 size
+= sprintf(&buf
[size
], "L/ Allocated : [ 0x");
2642 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2643 if (sizeof(long) > sizeof(u32
))
2645 dd
->port
->allocated
[n
/2] >> (32*(n
&1));
2647 group_allocated
= dd
->port
->allocated
[n
];
2648 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2650 size
+= sprintf(&buf
[size
], "]\n");
2652 size
+= sprintf(&buf
[size
], "L/ Commands in Q : [ 0x");
2654 for (n
= dd
->slot_groups
-1; n
>= 0; n
--) {
2655 if (sizeof(long) > sizeof(u32
))
2657 dd
->port
->cmds_to_issue
[n
/2] >> (32*(n
&1));
2659 group_allocated
= dd
->port
->cmds_to_issue
[n
];
2660 size
+= sprintf(&buf
[size
], "%08X ", group_allocated
);
2662 size
+= sprintf(&buf
[size
], "]\n");
2664 *offset
= size
<= len
? size
: len
;
2665 size
= copy_to_user(ubuf
, buf
, *offset
);
2672 static ssize_t
mtip_hw_read_flags(struct file
*f
, char __user
*ubuf
,
2673 size_t len
, loff_t
*offset
)
2675 struct driver_data
*dd
= (struct driver_data
*)f
->private_data
;
2676 char buf
[MTIP_DFS_MAX_BUF_SIZE
];
2682 size
+= sprintf(&buf
[size
], "Flag-port : [ %08lX ]\n",
2684 size
+= sprintf(&buf
[size
], "Flag-dd : [ %08lX ]\n",
2687 *offset
= size
<= len
? size
: len
;
2688 size
= copy_to_user(ubuf
, buf
, *offset
);
2695 static const struct file_operations mtip_regs_fops
= {
2696 .owner
= THIS_MODULE
,
2697 .open
= simple_open
,
2698 .read
= mtip_hw_read_registers
,
2699 .llseek
= no_llseek
,
2702 static const struct file_operations mtip_flags_fops
= {
2703 .owner
= THIS_MODULE
,
2704 .open
= simple_open
,
2705 .read
= mtip_hw_read_flags
,
2706 .llseek
= no_llseek
,
2710 * Create the sysfs related attributes.
2712 * @dd Pointer to the driver data structure.
2713 * @kobj Pointer to the kobj for the block device.
2716 * 0 Operation completed successfully.
2717 * -EINVAL Invalid parameter.
2719 static int mtip_hw_sysfs_init(struct driver_data
*dd
, struct kobject
*kobj
)
2724 if (sysfs_create_file(kobj
, &dev_attr_status
.attr
))
2725 dev_warn(&dd
->pdev
->dev
,
2726 "Error creating 'status' sysfs entry\n");
2731 * Remove the sysfs related attributes.
2733 * @dd Pointer to the driver data structure.
2734 * @kobj Pointer to the kobj for the block device.
2737 * 0 Operation completed successfully.
2738 * -EINVAL Invalid parameter.
2740 static int mtip_hw_sysfs_exit(struct driver_data
*dd
, struct kobject
*kobj
)
2745 sysfs_remove_file(kobj
, &dev_attr_status
.attr
);
2750 static int mtip_hw_debugfs_init(struct driver_data
*dd
)
2755 dd
->dfs_node
= debugfs_create_dir(dd
->disk
->disk_name
, dfs_parent
);
2756 if (IS_ERR_OR_NULL(dd
->dfs_node
)) {
2757 dev_warn(&dd
->pdev
->dev
,
2758 "Error creating node %s under debugfs\n",
2759 dd
->disk
->disk_name
);
2760 dd
->dfs_node
= NULL
;
2764 debugfs_create_file("flags", S_IRUGO
, dd
->dfs_node
, dd
,
2766 debugfs_create_file("registers", S_IRUGO
, dd
->dfs_node
, dd
,
2772 static void mtip_hw_debugfs_exit(struct driver_data
*dd
)
2774 debugfs_remove_recursive(dd
->dfs_node
);
2779 * Perform any init/resume time hardware setup
2781 * @dd Pointer to the driver data structure.
2786 static inline void hba_setup(struct driver_data
*dd
)
2789 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2791 /* interrupt bug workaround: use only 1 IS bit.*/
2793 HSORG_DISABLE_SLOTGRP_INTR
|
2794 HSORG_DISABLE_SLOTGRP_PXIS
,
2795 dd
->mmio
+ HOST_HSORG
);
2799 * Detect the details of the product, and store anything needed
2800 * into the driver data structure. This includes product type and
2801 * version and number of slot groups.
2803 * @dd Pointer to the driver data structure.
2808 static void mtip_detect_product(struct driver_data
*dd
)
2811 unsigned int rev
, slotgroups
;
2814 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
2816 * [15:8] hardware/software interface rev#
2817 * [ 3] asic-style interface
2818 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
2820 hwdata
= readl(dd
->mmio
+ HOST_HSORG
);
2822 dd
->product_type
= MTIP_PRODUCT_UNKNOWN
;
2823 dd
->slot_groups
= 1;
2826 dd
->product_type
= MTIP_PRODUCT_ASICFPGA
;
2827 rev
= (hwdata
& HSORG_HWREV
) >> 8;
2828 slotgroups
= (hwdata
& HSORG_SLOTGROUPS
) + 1;
2829 dev_info(&dd
->pdev
->dev
,
2830 "ASIC-FPGA design, HS rev 0x%x, "
2831 "%i slot groups [%i slots]\n",
2836 if (slotgroups
> MTIP_MAX_SLOT_GROUPS
) {
2837 dev_warn(&dd
->pdev
->dev
,
2838 "Warning: driver only supports "
2839 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS
);
2840 slotgroups
= MTIP_MAX_SLOT_GROUPS
;
2842 dd
->slot_groups
= slotgroups
;
2846 dev_warn(&dd
->pdev
->dev
, "Unrecognized product id\n");
2850 * Blocking wait for FTL rebuild to complete
2852 * @dd Pointer to the DRIVER_DATA structure.
2855 * 0 FTL rebuild completed successfully
2856 * -EFAULT FTL rebuild error/timeout/interruption
2858 static int mtip_ftl_rebuild_poll(struct driver_data
*dd
)
2860 unsigned long timeout
, cnt
= 0, start
;
2862 dev_warn(&dd
->pdev
->dev
,
2863 "FTL rebuild in progress. Polling for completion.\n");
2866 timeout
= jiffies
+ msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS
);
2869 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
2872 if (mtip_check_surprise_removal(dd
->pdev
))
2875 if (mtip_get_identify(dd
->port
, NULL
) < 0)
2878 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
2879 MTIP_FTL_REBUILD_MAGIC
) {
2881 /* Print message every 3 minutes */
2883 dev_warn(&dd
->pdev
->dev
,
2884 "FTL rebuild in progress (%d secs).\n",
2885 jiffies_to_msecs(jiffies
- start
) / 1000);
2889 dev_warn(&dd
->pdev
->dev
,
2890 "FTL rebuild complete (%d secs).\n",
2891 jiffies_to_msecs(jiffies
- start
) / 1000);
2892 mtip_block_initialize(dd
);
2896 } while (time_before(jiffies
, timeout
));
2898 /* Check for timeout */
2899 dev_err(&dd
->pdev
->dev
,
2900 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
2901 jiffies_to_msecs(jiffies
- start
) / 1000);
2906 * service thread to issue queued commands
2908 * @data Pointer to the driver data structure.
2914 static int mtip_service_thread(void *data
)
2916 struct driver_data
*dd
= (struct driver_data
*)data
;
2917 unsigned long slot
, slot_start
, slot_wrap
;
2918 unsigned int num_cmd_slots
= dd
->slot_groups
* 32;
2919 struct mtip_port
*port
= dd
->port
;
2923 * the condition is to check neither an internal command is
2924 * is in progress nor error handling is active
2926 wait_event_interruptible(port
->svc_wait
, (port
->flags
) &&
2927 !(port
->flags
& MTIP_PF_PAUSE_IO
));
2929 if (kthread_should_stop())
2932 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
2936 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
2937 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
)) {
2939 /* used to restrict the loop to one iteration */
2940 slot_start
= num_cmd_slots
;
2943 slot
= find_next_bit(port
->cmds_to_issue
,
2944 num_cmd_slots
, slot
);
2945 if (slot_wrap
== 1) {
2946 if ((slot_start
>= slot
) ||
2947 (slot
>= num_cmd_slots
))
2950 if (unlikely(slot_start
== num_cmd_slots
))
2953 if (unlikely(slot
== num_cmd_slots
)) {
2959 /* Issue the command to the hardware */
2960 mtip_issue_ncq_command(port
, slot
);
2962 clear_bit(slot
, port
->cmds_to_issue
);
2965 clear_bit(MTIP_PF_ISSUE_CMDS_BIT
, &port
->flags
);
2966 } else if (test_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
)) {
2967 if (!mtip_ftl_rebuild_poll(dd
))
2968 set_bit(MTIP_DDF_REBUILD_FAILED_BIT
,
2970 clear_bit(MTIP_PF_REBUILD_BIT
, &port
->flags
);
2972 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT
, &port
->flags
);
2974 if (test_bit(MTIP_PF_SVC_THD_STOP_BIT
, &port
->flags
))
2981 * Called once for each card.
2983 * @dd Pointer to the driver data structure.
2986 * 0 on success, else an error code.
2988 static int mtip_hw_init(struct driver_data
*dd
)
2992 unsigned int num_command_slots
;
2993 unsigned long timeout
, timetaken
;
2995 struct smart_attr attr242
;
2997 dd
->mmio
= pcim_iomap_table(dd
->pdev
)[MTIP_ABAR
];
2999 mtip_detect_product(dd
);
3000 if (dd
->product_type
== MTIP_PRODUCT_UNKNOWN
) {
3004 num_command_slots
= dd
->slot_groups
* 32;
3008 tasklet_init(&dd
->tasklet
, mtip_tasklet
, (unsigned long)dd
);
3010 dd
->port
= kzalloc(sizeof(struct mtip_port
), GFP_KERNEL
);
3012 dev_err(&dd
->pdev
->dev
,
3013 "Memory allocation: port structure\n");
3017 /* Counting semaphore to track command slot usage */
3018 sema_init(&dd
->port
->cmd_slot
, num_command_slots
- 1);
3020 /* Spinlock to prevent concurrent issue */
3021 spin_lock_init(&dd
->port
->cmd_issue_lock
);
3023 /* Set the port mmio base address. */
3024 dd
->port
->mmio
= dd
->mmio
+ PORT_OFFSET
;
3027 /* Allocate memory for the command list. */
3028 dd
->port
->command_list
=
3029 dmam_alloc_coherent(&dd
->pdev
->dev
,
3030 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3031 &dd
->port
->command_list_dma
,
3033 if (!dd
->port
->command_list
) {
3034 dev_err(&dd
->pdev
->dev
,
3035 "Memory allocation: command list\n");
3040 /* Clear the memory we have allocated. */
3041 memset(dd
->port
->command_list
,
3043 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4));
3045 /* Setup the addresse of the RX FIS. */
3046 dd
->port
->rxfis
= dd
->port
->command_list
+ HW_CMD_SLOT_SZ
;
3047 dd
->port
->rxfis_dma
= dd
->port
->command_list_dma
+ HW_CMD_SLOT_SZ
;
3049 /* Setup the address of the command tables. */
3050 dd
->port
->command_table
= dd
->port
->rxfis
+ AHCI_RX_FIS_SZ
;
3051 dd
->port
->command_tbl_dma
= dd
->port
->rxfis_dma
+ AHCI_RX_FIS_SZ
;
3053 /* Setup the address of the identify data. */
3054 dd
->port
->identify
= dd
->port
->command_table
+
3056 dd
->port
->identify_dma
= dd
->port
->command_tbl_dma
+
3059 /* Setup the address of the sector buffer - for some non-ncq cmds */
3060 dd
->port
->sector_buffer
= (void *) dd
->port
->identify
+ ATA_SECT_SIZE
;
3061 dd
->port
->sector_buffer_dma
= dd
->port
->identify_dma
+ ATA_SECT_SIZE
;
3063 /* Setup the address of the log buf - for read log command */
3064 dd
->port
->log_buf
= (void *)dd
->port
->sector_buffer
+ ATA_SECT_SIZE
;
3065 dd
->port
->log_buf_dma
= dd
->port
->sector_buffer_dma
+ ATA_SECT_SIZE
;
3067 /* Setup the address of the smart buf - for smart read data command */
3068 dd
->port
->smart_buf
= (void *)dd
->port
->log_buf
+ ATA_SECT_SIZE
;
3069 dd
->port
->smart_buf_dma
= dd
->port
->log_buf_dma
+ ATA_SECT_SIZE
;
3072 /* Point the command headers at the command tables. */
3073 for (i
= 0; i
< num_command_slots
; i
++) {
3074 dd
->port
->commands
[i
].command_header
=
3075 dd
->port
->command_list
+
3076 (sizeof(struct mtip_cmd_hdr
) * i
);
3077 dd
->port
->commands
[i
].command_header_dma
=
3078 dd
->port
->command_list_dma
+
3079 (sizeof(struct mtip_cmd_hdr
) * i
);
3081 dd
->port
->commands
[i
].command
=
3082 dd
->port
->command_table
+ (HW_CMD_TBL_SZ
* i
);
3083 dd
->port
->commands
[i
].command_dma
=
3084 dd
->port
->command_tbl_dma
+ (HW_CMD_TBL_SZ
* i
);
3086 if (readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_64
)
3087 dd
->port
->commands
[i
].command_header
->ctbau
=
3088 __force_bit2int
cpu_to_le32(
3089 (dd
->port
->commands
[i
].command_dma
>> 16) >> 16);
3090 dd
->port
->commands
[i
].command_header
->ctba
=
3091 __force_bit2int
cpu_to_le32(
3092 dd
->port
->commands
[i
].command_dma
& 0xFFFFFFFF);
3095 * If this is not done, a bug is reported by the stock
3096 * FC11 i386. Due to the fact that it has lots of kernel
3097 * debugging enabled.
3099 sg_init_table(dd
->port
->commands
[i
].sg
, MTIP_MAX_SG
);
3101 /* Mark all commands as currently inactive.*/
3102 atomic_set(&dd
->port
->commands
[i
].active
, 0);
3105 /* Setup the pointers to the extended s_active and CI registers. */
3106 for (i
= 0; i
< dd
->slot_groups
; i
++) {
3107 dd
->port
->s_active
[i
] =
3108 dd
->port
->mmio
+ i
*0x80 + PORT_SCR_ACT
;
3109 dd
->port
->cmd_issue
[i
] =
3110 dd
->port
->mmio
+ i
*0x80 + PORT_COMMAND_ISSUE
;
3111 dd
->port
->completed
[i
] =
3112 dd
->port
->mmio
+ i
*0x80 + PORT_SDBV
;
3115 timetaken
= jiffies
;
3116 timeout
= jiffies
+ msecs_to_jiffies(30000);
3117 while (((readl(dd
->port
->mmio
+ PORT_SCR_STAT
) & 0x0F) != 0x03) &&
3118 time_before(jiffies
, timeout
)) {
3121 if (unlikely(mtip_check_surprise_removal(dd
->pdev
))) {
3122 timetaken
= jiffies
- timetaken
;
3123 dev_warn(&dd
->pdev
->dev
,
3124 "Surprise removal detected at %u ms\n",
3125 jiffies_to_msecs(timetaken
));
3129 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
))) {
3130 timetaken
= jiffies
- timetaken
;
3131 dev_warn(&dd
->pdev
->dev
,
3132 "Removal detected at %u ms\n",
3133 jiffies_to_msecs(timetaken
));
3138 /* Conditionally reset the HBA. */
3139 if (!(readl(dd
->mmio
+ HOST_CAP
) & HOST_CAP_NZDMA
)) {
3140 if (mtip_hba_reset(dd
) < 0) {
3141 dev_err(&dd
->pdev
->dev
,
3142 "Card did not reset within timeout\n");
3147 /* Clear any pending interrupts on the HBA */
3148 writel(readl(dd
->mmio
+ HOST_IRQ_STAT
),
3149 dd
->mmio
+ HOST_IRQ_STAT
);
3152 mtip_init_port(dd
->port
);
3153 mtip_start_port(dd
->port
);
3155 /* Setup the ISR and enable interrupts. */
3156 rv
= devm_request_irq(&dd
->pdev
->dev
,
3160 dev_driver_string(&dd
->pdev
->dev
),
3164 dev_err(&dd
->pdev
->dev
,
3165 "Unable to allocate IRQ %d\n", dd
->pdev
->irq
);
3169 /* Enable interrupts on the HBA. */
3170 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3171 dd
->mmio
+ HOST_CTL
);
3173 init_timer(&dd
->port
->cmd_timer
);
3174 init_waitqueue_head(&dd
->port
->svc_wait
);
3176 dd
->port
->cmd_timer
.data
= (unsigned long int) dd
->port
;
3177 dd
->port
->cmd_timer
.function
= mtip_timeout_function
;
3178 mod_timer(&dd
->port
->cmd_timer
,
3179 jiffies
+ msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD
));
3182 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)) {
3187 if (mtip_get_identify(dd
->port
, NULL
) < 0) {
3192 if (*(dd
->port
->identify
+ MTIP_FTL_REBUILD_OFFSET
) ==
3193 MTIP_FTL_REBUILD_MAGIC
) {
3194 set_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
);
3195 return MTIP_FTL_REBUILD_MAGIC
;
3197 mtip_dump_identify(dd
->port
);
3199 /* check write protect, over temp and rebuild statuses */
3200 rv
= mtip_read_log_page(dd
->port
, ATA_LOG_SATA_NCQ
,
3202 dd
->port
->log_buf_dma
, 1);
3204 dev_warn(&dd
->pdev
->dev
,
3205 "Error in READ LOG EXT (10h) command\n");
3206 /* non-critical error, don't fail the load */
3208 buf
= (unsigned char *)dd
->port
->log_buf
;
3209 if (buf
[259] & 0x1) {
3210 dev_info(&dd
->pdev
->dev
,
3211 "Write protect bit is set.\n");
3212 set_bit(MTIP_DDF_WRITE_PROTECT_BIT
, &dd
->dd_flag
);
3214 if (buf
[288] == 0xF7) {
3215 dev_info(&dd
->pdev
->dev
,
3216 "Exceeded Tmax, drive in thermal shutdown.\n");
3217 set_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
);
3219 if (buf
[288] == 0xBF) {
3220 dev_info(&dd
->pdev
->dev
,
3221 "Drive indicates rebuild has failed.\n");
3226 /* get write protect progess */
3227 memset(&attr242
, 0, sizeof(struct smart_attr
));
3228 if (mtip_get_smart_attr(dd
->port
, 242, &attr242
))
3229 dev_warn(&dd
->pdev
->dev
,
3230 "Unable to check write protect progress\n");
3232 dev_info(&dd
->pdev
->dev
,
3233 "Write protect progress: %u%% (%u blocks)\n",
3234 attr242
.cur
, le32_to_cpu(attr242
.data
));
3238 del_timer_sync(&dd
->port
->cmd_timer
);
3240 /* Disable interrupts on the HBA. */
3241 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3242 dd
->mmio
+ HOST_CTL
);
3244 /*Release the IRQ. */
3245 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3248 mtip_deinit_port(dd
->port
);
3250 /* Free the command/command header memory. */
3251 dmam_free_coherent(&dd
->pdev
->dev
,
3252 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3253 dd
->port
->command_list
,
3254 dd
->port
->command_list_dma
);
3256 /* Free the memory allocated for the for structure. */
3263 * Called to deinitialize an interface.
3265 * @dd Pointer to the driver data structure.
3270 static int mtip_hw_exit(struct driver_data
*dd
)
3273 * Send standby immediate (E0h) to the drive so that it
3276 if (!test_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
)) {
3278 if (!test_bit(MTIP_PF_REBUILD_BIT
, &dd
->port
->flags
))
3279 if (mtip_standby_immediate(dd
->port
))
3280 dev_warn(&dd
->pdev
->dev
,
3281 "STANDBY IMMEDIATE failed\n");
3283 /* de-initialize the port. */
3284 mtip_deinit_port(dd
->port
);
3286 /* Disable interrupts on the HBA. */
3287 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3288 dd
->mmio
+ HOST_CTL
);
3291 del_timer_sync(&dd
->port
->cmd_timer
);
3293 /* Release the IRQ. */
3294 devm_free_irq(&dd
->pdev
->dev
, dd
->pdev
->irq
, dd
);
3296 /* Stop the bottom half tasklet. */
3297 tasklet_kill(&dd
->tasklet
);
3299 /* Free the command/command header memory. */
3300 dmam_free_coherent(&dd
->pdev
->dev
,
3301 HW_PORT_PRIV_DMA_SZ
+ (ATA_SECT_SIZE
* 4),
3302 dd
->port
->command_list
,
3303 dd
->port
->command_list_dma
);
3304 /* Free the memory allocated for the for structure. */
3311 * Issue a Standby Immediate command to the device.
3313 * This function is called by the Block Layer just before the
3314 * system powers off during a shutdown.
3316 * @dd Pointer to the driver data structure.
3321 static int mtip_hw_shutdown(struct driver_data
*dd
)
3324 * Send standby immediate (E0h) to the drive so that it
3327 mtip_standby_immediate(dd
->port
);
3335 * This function is called by the Block Layer just before the
3336 * system hibernates.
3338 * @dd Pointer to the driver data structure.
3341 * 0 Suspend was successful
3342 * -EFAULT Suspend was not successful
3344 static int mtip_hw_suspend(struct driver_data
*dd
)
3347 * Send standby immediate (E0h) to the drive
3348 * so that it saves its state.
3350 if (mtip_standby_immediate(dd
->port
) != 0) {
3351 dev_err(&dd
->pdev
->dev
,
3352 "Failed standby-immediate command\n");
3356 /* Disable interrupts on the HBA.*/
3357 writel(readl(dd
->mmio
+ HOST_CTL
) & ~HOST_IRQ_EN
,
3358 dd
->mmio
+ HOST_CTL
);
3359 mtip_deinit_port(dd
->port
);
3367 * This function is called by the Block Layer as the
3370 * @dd Pointer to the driver data structure.
3373 * 0 Resume was successful
3374 * -EFAULT Resume was not successful
3376 static int mtip_hw_resume(struct driver_data
*dd
)
3378 /* Perform any needed hardware setup steps */
3382 if (mtip_hba_reset(dd
) != 0) {
3383 dev_err(&dd
->pdev
->dev
,
3384 "Unable to reset the HBA\n");
3389 * Enable the port, DMA engine, and FIS reception specific
3390 * h/w in controller.
3392 mtip_init_port(dd
->port
);
3393 mtip_start_port(dd
->port
);
3395 /* Enable interrupts on the HBA.*/
3396 writel(readl(dd
->mmio
+ HOST_CTL
) | HOST_IRQ_EN
,
3397 dd
->mmio
+ HOST_CTL
);
3403 * Helper function for reusing disk name
3404 * upon hot insertion.
3406 static int rssd_disk_name_format(char *prefix
,
3411 const int base
= 'z' - 'a' + 1;
3412 char *begin
= buf
+ strlen(prefix
);
3413 char *end
= buf
+ buflen
;
3423 *--p
= 'a' + (index
% unit
);
3424 index
= (index
/ unit
) - 1;
3425 } while (index
>= 0);
3427 memmove(begin
, p
, end
- p
);
3428 memcpy(buf
, prefix
, strlen(prefix
));
3434 * Block layer IOCTL handler.
3436 * @dev Pointer to the block_device structure.
3438 * @cmd IOCTL command passed from the user application.
3439 * @arg Argument passed from the user application.
3442 * 0 IOCTL completed successfully.
3443 * -ENOTTY IOCTL not supported or invalid driver data
3444 * structure pointer.
3446 static int mtip_block_ioctl(struct block_device
*dev
,
3451 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3453 if (!capable(CAP_SYS_ADMIN
))
3459 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3466 return mtip_hw_ioctl(dd
, cmd
, arg
);
3470 #ifdef CONFIG_COMPAT
3472 * Block layer compat IOCTL handler.
3474 * @dev Pointer to the block_device structure.
3476 * @cmd IOCTL command passed from the user application.
3477 * @arg Argument passed from the user application.
3480 * 0 IOCTL completed successfully.
3481 * -ENOTTY IOCTL not supported or invalid driver data
3482 * structure pointer.
3484 static int mtip_block_compat_ioctl(struct block_device
*dev
,
3489 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3491 if (!capable(CAP_SYS_ADMIN
))
3497 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
)))
3503 case HDIO_DRIVE_TASKFILE
: {
3504 struct mtip_compat_ide_task_request_s __user
*compat_req_task
;
3505 ide_task_request_t req_task
;
3506 int compat_tasksize
, outtotal
, ret
;
3509 sizeof(struct mtip_compat_ide_task_request_s
);
3512 (struct mtip_compat_ide_task_request_s __user
*) arg
;
3514 if (copy_from_user(&req_task
, (void __user
*) arg
,
3515 compat_tasksize
- (2 * sizeof(compat_long_t
))))
3518 if (get_user(req_task
.out_size
, &compat_req_task
->out_size
))
3521 if (get_user(req_task
.in_size
, &compat_req_task
->in_size
))
3524 outtotal
= sizeof(struct mtip_compat_ide_task_request_s
);
3526 ret
= exec_drive_taskfile(dd
, (void __user
*) arg
,
3527 &req_task
, outtotal
);
3529 if (copy_to_user((void __user
*) arg
, &req_task
,
3531 (2 * sizeof(compat_long_t
))))
3534 if (put_user(req_task
.out_size
, &compat_req_task
->out_size
))
3537 if (put_user(req_task
.in_size
, &compat_req_task
->in_size
))
3543 return mtip_hw_ioctl(dd
, cmd
, arg
);
3549 * Obtain the geometry of the device.
3551 * You may think that this function is obsolete, but some applications,
3552 * fdisk for example still used CHS values. This function describes the
3553 * device as having 224 heads and 56 sectors per cylinder. These values are
3554 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
3555 * partition is described in terms of a start and end cylinder this means
3556 * that each partition is also 4KB aligned. Non-aligned partitions adversely
3557 * affects performance.
3559 * @dev Pointer to the block_device strucutre.
3560 * @geo Pointer to a hd_geometry structure.
3563 * 0 Operation completed successfully.
3564 * -ENOTTY An error occurred while reading the drive capacity.
3566 static int mtip_block_getgeo(struct block_device
*dev
,
3567 struct hd_geometry
*geo
)
3569 struct driver_data
*dd
= dev
->bd_disk
->private_data
;
3575 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3576 dev_warn(&dd
->pdev
->dev
,
3577 "Could not get drive capacity.\n");
3583 sector_div(capacity
, (geo
->heads
* geo
->sectors
));
3584 geo
->cylinders
= capacity
;
3589 * Block device operation function.
3591 * This structure contains pointers to the functions required by the block
3594 static const struct block_device_operations mtip_block_ops
= {
3595 .ioctl
= mtip_block_ioctl
,
3596 #ifdef CONFIG_COMPAT
3597 .compat_ioctl
= mtip_block_compat_ioctl
,
3599 .getgeo
= mtip_block_getgeo
,
3600 .owner
= THIS_MODULE
3604 * Block layer make request function.
3606 * This function is called by the kernel to process a BIO for
3609 * @queue Pointer to the request queue. Unused other than to obtain
3610 * the driver data structure.
3611 * @bio Pointer to the BIO.
3614 static void mtip_make_request(struct request_queue
*queue
, struct bio
*bio
)
3616 struct driver_data
*dd
= queue
->queuedata
;
3617 struct scatterlist
*sg
;
3618 struct bio_vec
*bvec
;
3622 if (unlikely(dd
->dd_flag
& MTIP_DDF_STOP_IO
)) {
3623 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT
,
3625 bio_endio(bio
, -ENXIO
);
3628 if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT
, &dd
->dd_flag
))) {
3629 bio_endio(bio
, -ENODATA
);
3632 if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT
,
3634 bio_data_dir(bio
))) {
3635 bio_endio(bio
, -ENODATA
);
3638 if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT
, &dd
->dd_flag
))) {
3639 bio_endio(bio
, -ENODATA
);
3644 if (unlikely(!bio_has_data(bio
))) {
3645 blk_queue_flush(queue
, 0);
3650 sg
= mtip_hw_get_scatterlist(dd
, &tag
);
3651 if (likely(sg
!= NULL
)) {
3652 blk_queue_bounce(queue
, &bio
);
3654 if (unlikely((bio
)->bi_vcnt
> MTIP_MAX_SG
)) {
3655 dev_warn(&dd
->pdev
->dev
,
3656 "Maximum number of SGL entries exceeded\n");
3658 mtip_hw_release_scatterlist(dd
, tag
);
3662 /* Create the scatter list for this bio. */
3663 bio_for_each_segment(bvec
, bio
, nents
) {
3664 sg_set_page(&sg
[nents
],
3670 /* Issue the read/write. */
3671 mtip_hw_submit_io(dd
,
3684 * Block layer initialization function.
3686 * This function is called once by the PCI layer for each P320
3687 * device that is connected to the system.
3689 * @dd Pointer to the driver data structure.
3692 * 0 on success else an error code.
3694 static int mtip_block_initialize(struct driver_data
*dd
)
3696 int rv
= 0, wait_for_rebuild
= 0;
3698 unsigned int index
= 0;
3699 struct kobject
*kobj
;
3700 unsigned char thd_name
[16];
3703 goto skip_create_disk
; /* hw init done, before rebuild */
3705 /* Initialize the protocol layer. */
3706 wait_for_rebuild
= mtip_hw_init(dd
);
3707 if (wait_for_rebuild
< 0) {
3708 dev_err(&dd
->pdev
->dev
,
3709 "Protocol layer initialization failed\n");
3711 goto protocol_init_error
;
3714 dd
->disk
= alloc_disk(MTIP_MAX_MINORS
);
3715 if (dd
->disk
== NULL
) {
3716 dev_err(&dd
->pdev
->dev
,
3717 "Unable to allocate gendisk structure\n");
3719 goto alloc_disk_error
;
3722 /* Generate the disk name, implemented same as in sd.c */
3724 if (!ida_pre_get(&rssd_index_ida
, GFP_KERNEL
))
3727 spin_lock(&rssd_index_lock
);
3728 rv
= ida_get_new(&rssd_index_ida
, &index
);
3729 spin_unlock(&rssd_index_lock
);
3730 } while (rv
== -EAGAIN
);
3735 rv
= rssd_disk_name_format("rssd",
3737 dd
->disk
->disk_name
,
3740 goto disk_index_error
;
3742 dd
->disk
->driverfs_dev
= &dd
->pdev
->dev
;
3743 dd
->disk
->major
= dd
->major
;
3744 dd
->disk
->first_minor
= dd
->instance
* MTIP_MAX_MINORS
;
3745 dd
->disk
->fops
= &mtip_block_ops
;
3746 dd
->disk
->private_data
= dd
;
3750 * if rebuild pending, start the service thread, and delay the block
3751 * queue creation and add_disk()
3753 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
3754 goto start_service_thread
;
3757 /* Allocate the request queue. */
3758 dd
->queue
= blk_alloc_queue(GFP_KERNEL
);
3759 if (dd
->queue
== NULL
) {
3760 dev_err(&dd
->pdev
->dev
,
3761 "Unable to allocate request queue\n");
3763 goto block_queue_alloc_init_error
;
3766 /* Attach our request function to the request queue. */
3767 blk_queue_make_request(dd
->queue
, mtip_make_request
);
3769 dd
->disk
->queue
= dd
->queue
;
3770 dd
->queue
->queuedata
= dd
;
3772 /* Set device limits. */
3773 set_bit(QUEUE_FLAG_NONROT
, &dd
->queue
->queue_flags
);
3774 blk_queue_max_segments(dd
->queue
, MTIP_MAX_SG
);
3775 blk_queue_physical_block_size(dd
->queue
, 4096);
3776 blk_queue_max_hw_sectors(dd
->queue
, 0xffff);
3777 blk_queue_max_segment_size(dd
->queue
, 0x400000);
3778 blk_queue_io_min(dd
->queue
, 4096);
3781 * write back cache is not supported in the device. FUA depends on
3782 * write back cache support, hence setting flush support to zero.
3784 blk_queue_flush(dd
->queue
, 0);
3786 /* Set the capacity of the device in 512 byte sectors. */
3787 if (!(mtip_hw_get_capacity(dd
, &capacity
))) {
3788 dev_warn(&dd
->pdev
->dev
,
3789 "Could not read drive capacity\n");
3791 goto read_capacity_error
;
3793 set_capacity(dd
->disk
, capacity
);
3795 /* Enable the block device and add it to /dev */
3799 * Now that the disk is active, initialize any sysfs attributes
3800 * managed by the protocol layer.
3802 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3804 mtip_hw_sysfs_init(dd
, kobj
);
3807 mtip_hw_debugfs_init(dd
);
3809 if (dd
->mtip_svc_handler
) {
3810 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
3811 return rv
; /* service thread created for handling rebuild */
3814 start_service_thread
:
3815 sprintf(thd_name
, "mtip_svc_thd_%02d", index
);
3817 dd
->mtip_svc_handler
= kthread_run(mtip_service_thread
,
3820 if (IS_ERR(dd
->mtip_svc_handler
)) {
3821 dev_err(&dd
->pdev
->dev
, "service thread failed to start\n");
3822 dd
->mtip_svc_handler
= NULL
;
3824 goto kthread_run_error
;
3827 if (wait_for_rebuild
== MTIP_FTL_REBUILD_MAGIC
)
3828 rv
= wait_for_rebuild
;
3833 mtip_hw_debugfs_exit(dd
);
3835 /* Delete our gendisk. This also removes the device from /dev */
3836 del_gendisk(dd
->disk
);
3838 read_capacity_error
:
3839 blk_cleanup_queue(dd
->queue
);
3841 block_queue_alloc_init_error
:
3843 spin_lock(&rssd_index_lock
);
3844 ida_remove(&rssd_index_ida
, index
);
3845 spin_unlock(&rssd_index_lock
);
3851 mtip_hw_exit(dd
); /* De-initialize the protocol layer. */
3853 protocol_init_error
:
3858 * Block layer deinitialization function.
3860 * Called by the PCI layer as each P320 device is removed.
3862 * @dd Pointer to the driver data structure.
3867 static int mtip_block_remove(struct driver_data
*dd
)
3869 struct kobject
*kobj
;
3871 if (dd
->mtip_svc_handler
) {
3872 set_bit(MTIP_PF_SVC_THD_STOP_BIT
, &dd
->port
->flags
);
3873 wake_up_interruptible(&dd
->port
->svc_wait
);
3874 kthread_stop(dd
->mtip_svc_handler
);
3877 /* Clean up the sysfs attributes, if created */
3878 if (test_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
)) {
3879 kobj
= kobject_get(&disk_to_dev(dd
->disk
)->kobj
);
3881 mtip_hw_sysfs_exit(dd
, kobj
);
3885 mtip_hw_debugfs_exit(dd
);
3888 * Delete our gendisk structure. This also removes the device
3892 if (dd
->disk
->queue
)
3893 del_gendisk(dd
->disk
);
3898 spin_lock(&rssd_index_lock
);
3899 ida_remove(&rssd_index_ida
, dd
->index
);
3900 spin_unlock(&rssd_index_lock
);
3902 blk_cleanup_queue(dd
->queue
);
3906 /* De-initialize the protocol layer. */
3913 * Function called by the PCI layer when just before the
3914 * machine shuts down.
3916 * If a protocol layer shutdown function is present it will be called
3919 * @dd Pointer to the driver data structure.
3924 static int mtip_block_shutdown(struct driver_data
*dd
)
3926 dev_info(&dd
->pdev
->dev
,
3927 "Shutting down %s ...\n", dd
->disk
->disk_name
);
3929 /* Delete our gendisk structure, and cleanup the blk queue. */
3931 if (dd
->disk
->queue
)
3932 del_gendisk(dd
->disk
);
3938 spin_lock(&rssd_index_lock
);
3939 ida_remove(&rssd_index_ida
, dd
->index
);
3940 spin_unlock(&rssd_index_lock
);
3942 blk_cleanup_queue(dd
->queue
);
3946 mtip_hw_shutdown(dd
);
3950 static int mtip_block_suspend(struct driver_data
*dd
)
3952 dev_info(&dd
->pdev
->dev
,
3953 "Suspending %s ...\n", dd
->disk
->disk_name
);
3954 mtip_hw_suspend(dd
);
3958 static int mtip_block_resume(struct driver_data
*dd
)
3960 dev_info(&dd
->pdev
->dev
, "Resuming %s ...\n",
3961 dd
->disk
->disk_name
);
3967 * Called for each supported PCI device detected.
3969 * This function allocates the private data structure, enables the
3970 * PCI device and then calls the block layer initialization function.
3973 * 0 on success else an error code.
3975 static int mtip_pci_probe(struct pci_dev
*pdev
,
3976 const struct pci_device_id
*ent
)
3979 struct driver_data
*dd
= NULL
;
3981 /* Allocate memory for this devices private data. */
3982 dd
= kzalloc(sizeof(struct driver_data
), GFP_KERNEL
);
3985 "Unable to allocate memory for driver data\n");
3989 /* Attach the private data to this PCI device. */
3990 pci_set_drvdata(pdev
, dd
);
3992 rv
= pcim_enable_device(pdev
);
3994 dev_err(&pdev
->dev
, "Unable to enable device\n");
3998 /* Map BAR5 to memory. */
3999 rv
= pcim_iomap_regions(pdev
, 1 << MTIP_ABAR
, MTIP_DRV_NAME
);
4001 dev_err(&pdev
->dev
, "Unable to map regions\n");
4005 if (!pci_set_dma_mask(pdev
, DMA_BIT_MASK(64))) {
4006 rv
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
4009 rv
= pci_set_consistent_dma_mask(pdev
,
4012 dev_warn(&pdev
->dev
,
4013 "64-bit DMA enable failed\n");
4019 pci_set_master(pdev
);
4021 if (pci_enable_msi(pdev
)) {
4022 dev_warn(&pdev
->dev
,
4023 "Unable to enable MSI interrupt.\n");
4024 goto block_initialize_err
;
4027 /* Copy the info we may need later into the private data structure. */
4028 dd
->major
= mtip_major
;
4029 dd
->instance
= instance
;
4032 /* Initialize the block layer. */
4033 rv
= mtip_block_initialize(dd
);
4036 "Unable to initialize block layer\n");
4037 goto block_initialize_err
;
4041 * Increment the instance count so that each device has a unique
4045 if (rv
!= MTIP_FTL_REBUILD_MAGIC
)
4046 set_bit(MTIP_DDF_INIT_DONE_BIT
, &dd
->dd_flag
);
4049 block_initialize_err
:
4050 pci_disable_msi(pdev
);
4053 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4057 pci_set_drvdata(pdev
, NULL
);
4064 * Called for each probed device when the device is removed or the
4065 * driver is unloaded.
4070 static void mtip_pci_remove(struct pci_dev
*pdev
)
4072 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4075 set_bit(MTIP_DDF_REMOVE_PENDING_BIT
, &dd
->dd_flag
);
4077 if (mtip_check_surprise_removal(pdev
)) {
4078 while (!test_bit(MTIP_DDF_CLEANUP_BIT
, &dd
->dd_flag
)) {
4081 if (counter
== 10) {
4082 /* Cleanup the outstanding commands */
4083 mtip_command_cleanup(dd
);
4089 /* Clean up the block layer. */
4090 mtip_block_remove(dd
);
4092 pci_disable_msi(pdev
);
4095 pcim_iounmap_regions(pdev
, 1 << MTIP_ABAR
);
4099 * Called for each probed device when the device is suspended.
4105 static int mtip_pci_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
4108 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4112 "Driver private datastructure is NULL\n");
4116 set_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4118 /* Disable ports & interrupts then send standby immediate */
4119 rv
= mtip_block_suspend(dd
);
4122 "Failed to suspend controller\n");
4127 * Save the pci config space to pdev structure &
4128 * disable the device
4130 pci_save_state(pdev
);
4131 pci_disable_device(pdev
);
4133 /* Move to Low power state*/
4134 pci_set_power_state(pdev
, PCI_D3hot
);
4140 * Called for each probed device when the device is resumed.
4146 static int mtip_pci_resume(struct pci_dev
*pdev
)
4149 struct driver_data
*dd
;
4151 dd
= pci_get_drvdata(pdev
);
4154 "Driver private datastructure is NULL\n");
4158 /* Move the device to active State */
4159 pci_set_power_state(pdev
, PCI_D0
);
4161 /* Restore PCI configuration space */
4162 pci_restore_state(pdev
);
4164 /* Enable the PCI device*/
4165 rv
= pcim_enable_device(pdev
);
4168 "Failed to enable card during resume\n");
4171 pci_set_master(pdev
);
4174 * Calls hbaReset, initPort, & startPort function
4175 * then enables interrupts
4177 rv
= mtip_block_resume(dd
);
4179 dev_err(&pdev
->dev
, "Unable to resume\n");
4182 clear_bit(MTIP_DDF_RESUME_BIT
, &dd
->dd_flag
);
4193 static void mtip_pci_shutdown(struct pci_dev
*pdev
)
4195 struct driver_data
*dd
= pci_get_drvdata(pdev
);
4197 mtip_block_shutdown(dd
);
4200 /* Table of device ids supported by this driver. */
4201 static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl
) = {
4202 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320H_DEVICE_ID
) },
4203 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320M_DEVICE_ID
) },
4204 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P320S_DEVICE_ID
) },
4205 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P325M_DEVICE_ID
) },
4206 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P420H_DEVICE_ID
) },
4207 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P420M_DEVICE_ID
) },
4208 { PCI_DEVICE(PCI_VENDOR_ID_MICRON
, P425M_DEVICE_ID
) },
4212 /* Structure that describes the PCI driver functions. */
4213 static struct pci_driver mtip_pci_driver
= {
4214 .name
= MTIP_DRV_NAME
,
4215 .id_table
= mtip_pci_tbl
,
4216 .probe
= mtip_pci_probe
,
4217 .remove
= mtip_pci_remove
,
4218 .suspend
= mtip_pci_suspend
,
4219 .resume
= mtip_pci_resume
,
4220 .shutdown
= mtip_pci_shutdown
,
4223 MODULE_DEVICE_TABLE(pci
, mtip_pci_tbl
);
4226 * Module initialization function.
4228 * Called once when the module is loaded. This function allocates a major
4229 * block device number to the Cyclone devices and registers the PCI layer
4233 * 0 on success else error code.
4235 static int __init
mtip_init(void)
4239 pr_info(MTIP_DRV_NAME
" Version " MTIP_DRV_VERSION
"\n");
4241 /* Allocate a major block device number to use with this driver. */
4242 error
= register_blkdev(0, MTIP_DRV_NAME
);
4244 pr_err("Unable to register block device (%d)\n",
4251 dfs_parent
= debugfs_create_dir("rssd", NULL
);
4252 if (IS_ERR_OR_NULL(dfs_parent
)) {
4253 pr_warn("Error creating debugfs parent\n");
4258 /* Register our PCI operations. */
4259 error
= pci_register_driver(&mtip_pci_driver
);
4261 debugfs_remove(dfs_parent
);
4262 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4269 * Module de-initialization function.
4271 * Called once when the module is unloaded. This function deallocates
4272 * the major block device number allocated by mtip_init() and
4273 * unregisters the PCI layer of the driver.
4278 static void __exit
mtip_exit(void)
4280 debugfs_remove_recursive(dfs_parent
);
4282 /* Release the allocated major block device number. */
4283 unregister_blkdev(mtip_major
, MTIP_DRV_NAME
);
4285 /* Unregister the PCI driver. */
4286 pci_unregister_driver(&mtip_pci_driver
);
4289 MODULE_AUTHOR("Micron Technology, Inc");
4290 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
4291 MODULE_LICENSE("GPL");
4292 MODULE_VERSION(MTIP_DRV_VERSION
);
4294 module_init(mtip_init
);
4295 module_exit(mtip_exit
);