1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Driver for the Micron P320 SSD
4 * Copyright (C) 2011 Micron Technology, Inc.
6 * Portions of this code were derived from works subjected to the
8 * Copyright (C) 2009 Integrated Device Technology, Inc.
11 #include <linux/pci.h>
12 #include <linux/interrupt.h>
13 #include <linux/ata.h>
14 #include <linux/delay.h>
15 #include <linux/hdreg.h>
16 #include <linux/uaccess.h>
17 #include <linux/random.h>
18 #include <linux/smp.h>
19 #include <linux/compat.h>
21 #include <linux/module.h>
22 #include <linux/genhd.h>
23 #include <linux/blkdev.h>
24 #include <linux/blk-mq.h>
25 #include <linux/bio.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/idr.h>
28 #include <linux/kthread.h>
29 #include <../drivers/ata/ahci.h>
30 #include <linux/export.h>
31 #include <linux/debugfs.h>
32 #include <linux/prefetch.h>
33 #include <linux/numa.h>
36 #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
38 /* DMA region containing RX Fis, Identify, RLE10, and SMART buffers */
39 #define AHCI_RX_FIS_SZ 0x100
40 #define AHCI_RX_FIS_OFFSET 0x0
41 #define AHCI_IDFY_SZ ATA_SECT_SIZE
42 #define AHCI_IDFY_OFFSET 0x400
43 #define AHCI_SECTBUF_SZ ATA_SECT_SIZE
44 #define AHCI_SECTBUF_OFFSET 0x800
45 #define AHCI_SMARTBUF_SZ ATA_SECT_SIZE
46 #define AHCI_SMARTBUF_OFFSET 0xC00
47 /* 0x100 + 0x200 + 0x200 + 0x200 is smaller than 4k but we pad it out */
48 #define BLOCK_DMA_ALLOC_SZ 4096
50 /* DMA region containing command table (should be 8192 bytes) */
51 #define AHCI_CMD_SLOT_SZ sizeof(struct mtip_cmd_hdr)
52 #define AHCI_CMD_TBL_SZ (MTIP_MAX_COMMAND_SLOTS * AHCI_CMD_SLOT_SZ)
53 #define AHCI_CMD_TBL_OFFSET 0x0
55 /* DMA region per command (contains header and SGL) */
56 #define AHCI_CMD_TBL_HDR_SZ 0x80
57 #define AHCI_CMD_TBL_HDR_OFFSET 0x0
58 #define AHCI_CMD_TBL_SGL_SZ (MTIP_MAX_SG * sizeof(struct mtip_cmd_sg))
59 #define AHCI_CMD_TBL_SGL_OFFSET AHCI_CMD_TBL_HDR_SZ
60 #define CMD_DMA_ALLOC_SZ (AHCI_CMD_TBL_SGL_SZ + AHCI_CMD_TBL_HDR_SZ)
63 #define HOST_CAP_NZDMA (1 << 19)
64 #define HOST_HSORG 0xFC
65 #define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
66 #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
67 #define HSORG_HWREV 0xFF00
68 #define HSORG_STYLE 0x8
69 #define HSORG_SLOTGROUPS 0x7
71 #define PORT_COMMAND_ISSUE 0x38
72 #define PORT_SDBV 0x7C
74 #define PORT_OFFSET 0x100
75 #define PORT_MEM_SIZE 0x80
77 #define PORT_IRQ_ERR \
78 (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
79 PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
80 PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
82 #define PORT_IRQ_LEGACY \
83 (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
84 #define PORT_IRQ_HANDLED \
85 (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
86 PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
87 PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
88 #define DEF_PORT_IRQ \
89 (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
92 #define MTIP_PRODUCT_UNKNOWN 0x00
93 #define MTIP_PRODUCT_ASICFPGA 0x11
95 /* Device instance number, incremented each time a device is probed. */
98 static struct list_head online_list;
99 static struct list_head removing_list;
100 static spinlock_t dev_lock;
103 * Global variable used to hold the major block device number
104 * allocated in mtip_init().
106 static int mtip_major;
107 static struct dentry *dfs_parent;
108 static struct dentry *dfs_device_status;
110 static u32 cpu_use[NR_CPUS];
112 static DEFINE_IDA(rssd_index_ida);
114 static int mtip_block_initialize(struct driver_data *dd);
117 struct mtip_compat_ide_task_request_s {
120 ide_reg_valid_t out_flags;
121 ide_reg_valid_t in_flags;
124 compat_ulong_t out_size;
125 compat_ulong_t in_size;
130 * This function check_for_surprise_removal is called
131 * while card is removed from the system and it will
132 * read the vendor id from the configuration space
134 * @pdev Pointer to the pci_dev structure.
137 * true if device removed, else false
139 static bool mtip_check_surprise_removal(struct pci_dev *pdev)
142 struct driver_data *dd = pci_get_drvdata(pdev);
147 /* Read the vendorID from the configuration space */
148 pci_read_config_word(pdev, 0x00, &vendor_id);
149 if (vendor_id == 0xFFFF) {
152 blk_queue_flag_set(QUEUE_FLAG_DEAD, dd->queue);
154 dev_warn(&dd->pdev->dev,
155 "%s: dd->queue is NULL\n", __func__);
156 return true; /* device removed */
159 return false; /* device present */
162 static struct mtip_cmd *mtip_cmd_from_tag(struct driver_data *dd,
165 struct blk_mq_hw_ctx *hctx = dd->queue->queue_hw_ctx[0];
167 return blk_mq_rq_to_pdu(blk_mq_tag_to_rq(hctx->tags, tag));
171 * Reset the HBA (without sleeping)
173 * @dd Pointer to the driver data structure.
176 * 0 The reset was successful.
177 * -1 The HBA Reset bit did not clear.
179 static int mtip_hba_reset(struct driver_data *dd)
181 unsigned long timeout;
183 /* Set the reset bit */
184 writel(HOST_RESET, dd->mmio + HOST_CTL);
187 readl(dd->mmio + HOST_CTL);
190 * Spin for up to 10 seconds waiting for reset acknowledgement. Spec
191 * is 1 sec but in LUN failure conditions, up to 10 secs are required
193 timeout = jiffies + msecs_to_jiffies(10000);
196 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))
199 } while ((readl(dd->mmio + HOST_CTL) & HOST_RESET)
200 && time_before(jiffies, timeout));
202 if (readl(dd->mmio + HOST_CTL) & HOST_RESET)
209 * Issue a command to the hardware.
211 * Set the appropriate bit in the s_active and Command Issue hardware
212 * registers, causing hardware command processing to begin.
214 * @port Pointer to the port structure.
215 * @tag The tag of the command to be issued.
220 static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag)
222 int group = tag >> 5;
224 /* guard SACT and CI registers */
225 spin_lock(&port->cmd_issue_lock[group]);
226 writel((1 << MTIP_TAG_BIT(tag)),
227 port->s_active[MTIP_TAG_INDEX(tag)]);
228 writel((1 << MTIP_TAG_BIT(tag)),
229 port->cmd_issue[MTIP_TAG_INDEX(tag)]);
230 spin_unlock(&port->cmd_issue_lock[group]);
234 * Enable/disable the reception of FIS
236 * @port Pointer to the port data structure
237 * @enable 1 to enable, 0 to disable
240 * Previous state: 1 enabled, 0 disabled
242 static int mtip_enable_fis(struct mtip_port *port, int enable)
246 /* enable FIS reception */
247 tmp = readl(port->mmio + PORT_CMD);
249 writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
251 writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
254 readl(port->mmio + PORT_CMD);
256 return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX));
260 * Enable/disable the DMA engine
262 * @port Pointer to the port data structure
263 * @enable 1 to enable, 0 to disable
266 * Previous state: 1 enabled, 0 disabled.
268 static int mtip_enable_engine(struct mtip_port *port, int enable)
272 /* enable FIS reception */
273 tmp = readl(port->mmio + PORT_CMD);
275 writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD);
277 writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD);
279 readl(port->mmio + PORT_CMD);
280 return (((tmp & PORT_CMD_START) == PORT_CMD_START));
284 * Enables the port DMA engine and FIS reception.
289 static inline void mtip_start_port(struct mtip_port *port)
291 /* Enable FIS reception */
292 mtip_enable_fis(port, 1);
294 /* Enable the DMA engine */
295 mtip_enable_engine(port, 1);
299 * Deinitialize a port by disabling port interrupts, the DMA engine,
302 * @port Pointer to the port structure
307 static inline void mtip_deinit_port(struct mtip_port *port)
309 /* Disable interrupts on this port */
310 writel(0, port->mmio + PORT_IRQ_MASK);
312 /* Disable the DMA engine */
313 mtip_enable_engine(port, 0);
315 /* Disable FIS reception */
316 mtip_enable_fis(port, 0);
322 * This function deinitializes the port by calling mtip_deinit_port() and
323 * then initializes it by setting the command header and RX FIS addresses,
324 * clearing the SError register and any pending port interrupts before
325 * re-enabling the default set of port interrupts.
327 * @port Pointer to the port structure.
332 static void mtip_init_port(struct mtip_port *port)
335 mtip_deinit_port(port);
337 /* Program the command list base and FIS base addresses */
338 if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) {
339 writel((port->command_list_dma >> 16) >> 16,
340 port->mmio + PORT_LST_ADDR_HI);
341 writel((port->rxfis_dma >> 16) >> 16,
342 port->mmio + PORT_FIS_ADDR_HI);
343 set_bit(MTIP_PF_HOST_CAP_64, &port->flags);
346 writel(port->command_list_dma & 0xFFFFFFFF,
347 port->mmio + PORT_LST_ADDR);
348 writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR);
351 writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR);
353 /* reset the completed registers.*/
354 for (i = 0; i < port->dd->slot_groups; i++)
355 writel(0xFFFFFFFF, port->completed[i]);
357 /* Clear any pending interrupts for this port */
358 writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT);
360 /* Clear any pending interrupts on the HBA. */
361 writel(readl(port->dd->mmio + HOST_IRQ_STAT),
362 port->dd->mmio + HOST_IRQ_STAT);
364 /* Enable port interrupts */
365 writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK);
371 * @port Pointer to the port data structure.
376 static void mtip_restart_port(struct mtip_port *port)
378 unsigned long timeout;
380 /* Disable the DMA engine */
381 mtip_enable_engine(port, 0);
383 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
384 timeout = jiffies + msecs_to_jiffies(500);
385 while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON)
386 && time_before(jiffies, timeout))
389 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
393 * Chip quirk: escalate to hba reset if
394 * PxCMD.CR not clear after 500 ms
396 if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) {
397 dev_warn(&port->dd->pdev->dev,
398 "PxCMD.CR not clear, escalating reset\n");
400 if (mtip_hba_reset(port->dd))
401 dev_err(&port->dd->pdev->dev,
402 "HBA reset escalation failed.\n");
404 /* 30 ms delay before com reset to quiesce chip */
408 dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n");
411 writel(readl(port->mmio + PORT_SCR_CTL) |
412 1, port->mmio + PORT_SCR_CTL);
413 readl(port->mmio + PORT_SCR_CTL);
415 /* Wait 1 ms to quiesce chip function */
416 timeout = jiffies + msecs_to_jiffies(1);
417 while (time_before(jiffies, timeout))
420 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
423 /* Clear PxSCTL.DET */
424 writel(readl(port->mmio + PORT_SCR_CTL) & ~1,
425 port->mmio + PORT_SCR_CTL);
426 readl(port->mmio + PORT_SCR_CTL);
428 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
429 timeout = jiffies + msecs_to_jiffies(500);
430 while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
431 && time_before(jiffies, timeout))
434 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
437 if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
438 dev_warn(&port->dd->pdev->dev,
439 "COM reset failed\n");
441 mtip_init_port(port);
442 mtip_start_port(port);
446 static int mtip_device_reset(struct driver_data *dd)
450 if (mtip_check_surprise_removal(dd->pdev))
453 if (mtip_hba_reset(dd) < 0)
457 mtip_init_port(dd->port);
458 mtip_start_port(dd->port);
460 /* Enable interrupts on the HBA. */
461 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
462 dd->mmio + HOST_CTL);
467 * Helper function for tag logging
469 static void print_tags(struct driver_data *dd,
471 unsigned long *tagbits,
474 unsigned char tagmap[128];
475 int group, tagmap_len = 0;
477 memset(tagmap, 0, sizeof(tagmap));
478 for (group = SLOTBITS_IN_LONGS; group > 0; group--)
479 tagmap_len += sprintf(tagmap + tagmap_len, "%016lX ",
481 dev_warn(&dd->pdev->dev,
482 "%d command(s) %s: tagmap [%s]", cnt, msg, tagmap);
485 static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
486 dma_addr_t buffer_dma, unsigned int sectors);
487 static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
488 struct smart_attr *attrib);
490 static void mtip_complete_command(struct mtip_cmd *cmd, blk_status_t status)
492 struct request *req = blk_mq_rq_from_pdu(cmd);
494 cmd->status = status;
495 if (likely(!blk_should_fake_timeout(req->q)))
496 blk_mq_complete_request(req);
502 * @dd Pointer to the DRIVER_DATA structure.
507 static void mtip_handle_tfe(struct driver_data *dd)
509 int group, tag, bit, reissue, rv;
510 struct mtip_port *port;
511 struct mtip_cmd *cmd;
513 struct host_to_dev_fis *fis;
514 unsigned long tagaccum[SLOTBITS_IN_LONGS];
515 unsigned int cmd_cnt = 0;
517 char *fail_reason = NULL;
518 int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0;
520 dev_warn(&dd->pdev->dev, "Taskfile error\n");
524 if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
525 cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
526 dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n");
527 mtip_complete_command(cmd, BLK_STS_IOERR);
531 /* clear the tag accumulator */
532 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
534 /* Loop through all the groups */
535 for (group = 0; group < dd->slot_groups; group++) {
536 completed = readl(port->completed[group]);
538 dev_warn(&dd->pdev->dev, "g=%u, comp=%x\n", group, completed);
540 /* clear completed status register in the hardware.*/
541 writel(completed, port->completed[group]);
543 /* Process successfully completed commands */
544 for (bit = 0; bit < 32 && completed; bit++) {
545 if (!(completed & (1<<bit)))
547 tag = (group << 5) + bit;
549 /* Skip the internal command slot */
550 if (tag == MTIP_TAG_INTERNAL)
553 cmd = mtip_cmd_from_tag(dd, tag);
554 mtip_complete_command(cmd, 0);
555 set_bit(tag, tagaccum);
560 print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt);
562 /* Restart the port */
564 mtip_restart_port(port);
566 /* Trying to determine the cause of the error */
567 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
569 dd->port->log_buf_dma, 1);
571 dev_warn(&dd->pdev->dev,
572 "Error in READ LOG EXT (10h) command\n");
573 /* non-critical error, don't fail the load */
575 buf = (unsigned char *)dd->port->log_buf;
576 if (buf[259] & 0x1) {
577 dev_info(&dd->pdev->dev,
578 "Write protect bit is set.\n");
579 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
580 fail_all_ncq_write = 1;
581 fail_reason = "write protect";
583 if (buf[288] == 0xF7) {
584 dev_info(&dd->pdev->dev,
585 "Exceeded Tmax, drive in thermal shutdown.\n");
586 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
587 fail_all_ncq_cmds = 1;
588 fail_reason = "thermal shutdown";
590 if (buf[288] == 0xBF) {
591 set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag);
592 dev_info(&dd->pdev->dev,
593 "Drive indicates rebuild has failed. Secure erase required.\n");
594 fail_all_ncq_cmds = 1;
595 fail_reason = "rebuild failed";
599 /* clear the tag accumulator */
600 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
602 /* Loop through all the groups */
603 for (group = 0; group < dd->slot_groups; group++) {
604 for (bit = 0; bit < 32; bit++) {
606 tag = (group << 5) + bit;
607 cmd = mtip_cmd_from_tag(dd, tag);
609 fis = (struct host_to_dev_fis *)cmd->command;
611 /* Should re-issue? */
612 if (tag == MTIP_TAG_INTERNAL ||
613 fis->command == ATA_CMD_SET_FEATURES)
616 if (fail_all_ncq_cmds ||
617 (fail_all_ncq_write &&
618 fis->command == ATA_CMD_FPDMA_WRITE)) {
619 dev_warn(&dd->pdev->dev,
620 " Fail: %s w/tag %d [%s].\n",
621 fis->command == ATA_CMD_FPDMA_WRITE ?
624 fail_reason != NULL ?
625 fail_reason : "unknown");
626 mtip_complete_command(cmd, BLK_STS_MEDIUM);
632 * First check if this command has
633 * exceeded its retries.
635 if (reissue && (cmd->retries-- > 0)) {
637 set_bit(tag, tagaccum);
639 /* Re-issue the command. */
640 mtip_issue_ncq_command(port, tag);
645 /* Retire a command that will not be reissued */
646 dev_warn(&port->dd->pdev->dev,
647 "retiring tag %d\n", tag);
649 mtip_complete_command(cmd, BLK_STS_IOERR);
652 print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt);
656 * Handle a set device bits interrupt
658 static inline void mtip_workq_sdbfx(struct mtip_port *port, int group,
661 struct driver_data *dd = port->dd;
663 struct mtip_cmd *command;
666 WARN_ON_ONCE(!completed);
669 /* clear completed status register in the hardware.*/
670 writel(completed, port->completed[group]);
672 /* Process completed commands. */
673 for (bit = 0; (bit < 32) && completed; bit++) {
674 if (completed & 0x01) {
675 tag = (group << 5) | bit;
677 /* skip internal command slot. */
678 if (unlikely(tag == MTIP_TAG_INTERNAL))
681 command = mtip_cmd_from_tag(dd, tag);
682 mtip_complete_command(command, 0);
687 /* If last, re-enable interrupts */
688 if (atomic_dec_return(&dd->irq_workers_active) == 0)
689 writel(0xffffffff, dd->mmio + HOST_IRQ_STAT);
693 * Process legacy pio and d2h interrupts
695 static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat)
697 struct mtip_port *port = dd->port;
698 struct mtip_cmd *cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
700 if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) && cmd) {
701 int group = MTIP_TAG_INDEX(MTIP_TAG_INTERNAL);
702 int status = readl(port->cmd_issue[group]);
704 if (!(status & (1 << MTIP_TAG_BIT(MTIP_TAG_INTERNAL))))
705 mtip_complete_command(cmd, 0);
710 * Demux and handle errors
712 static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
714 if (unlikely(port_stat & PORT_IRQ_CONNECT)) {
715 dev_warn(&dd->pdev->dev,
716 "Clearing PxSERR.DIAG.x\n");
717 writel((1 << 26), dd->port->mmio + PORT_SCR_ERR);
720 if (unlikely(port_stat & PORT_IRQ_PHYRDY)) {
721 dev_warn(&dd->pdev->dev,
722 "Clearing PxSERR.DIAG.n\n");
723 writel((1 << 16), dd->port->mmio + PORT_SCR_ERR);
726 if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) {
727 dev_warn(&dd->pdev->dev,
728 "Port stat errors %x unhandled\n",
729 (port_stat & ~PORT_IRQ_HANDLED));
730 if (mtip_check_surprise_removal(dd->pdev))
733 if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) {
734 set_bit(MTIP_PF_EH_ACTIVE_BIT, &dd->port->flags);
735 wake_up_interruptible(&dd->port->svc_wait);
739 static inline irqreturn_t mtip_handle_irq(struct driver_data *data)
741 struct driver_data *dd = (struct driver_data *) data;
742 struct mtip_port *port = dd->port;
743 u32 hba_stat, port_stat;
745 int do_irq_enable = 1, i, workers;
746 struct mtip_work *twork;
748 hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
752 /* Acknowledge the interrupt status on the port.*/
753 port_stat = readl(port->mmio + PORT_IRQ_STAT);
754 if (unlikely(port_stat == 0xFFFFFFFF)) {
755 mtip_check_surprise_removal(dd->pdev);
758 writel(port_stat, port->mmio + PORT_IRQ_STAT);
760 /* Demux port status */
761 if (likely(port_stat & PORT_IRQ_SDB_FIS)) {
763 WARN_ON_ONCE(atomic_read(&dd->irq_workers_active) != 0);
765 /* Start at 1: group zero is always local? */
766 for (i = 0, workers = 0; i < MTIP_MAX_SLOT_GROUPS;
768 twork = &dd->work[i];
769 twork->completed = readl(port->completed[i]);
770 if (twork->completed)
774 atomic_set(&dd->irq_workers_active, workers);
776 for (i = 1; i < MTIP_MAX_SLOT_GROUPS; i++) {
777 twork = &dd->work[i];
778 if (twork->completed)
785 if (likely(dd->work[0].completed))
786 mtip_workq_sdbfx(port, 0,
787 dd->work[0].completed);
791 * Chip quirk: SDB interrupt but nothing
798 if (unlikely(port_stat & PORT_IRQ_ERR)) {
799 if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
800 /* don't proceed further */
803 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
807 mtip_process_errors(dd, port_stat & PORT_IRQ_ERR);
810 if (unlikely(port_stat & PORT_IRQ_LEGACY))
811 mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY);
814 /* acknowledge interrupt */
815 if (unlikely(do_irq_enable))
816 writel(hba_stat, dd->mmio + HOST_IRQ_STAT);
822 * HBA interrupt subroutine.
825 * @instance Pointer to the driver data structure.
828 * IRQ_HANDLED A HBA interrupt was pending and handled.
829 * IRQ_NONE This interrupt was not for the HBA.
831 static irqreturn_t mtip_irq_handler(int irq, void *instance)
833 struct driver_data *dd = instance;
835 return mtip_handle_irq(dd);
838 static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag)
840 writel(1 << MTIP_TAG_BIT(tag), port->cmd_issue[MTIP_TAG_INDEX(tag)]);
843 static bool mtip_pause_ncq(struct mtip_port *port,
844 struct host_to_dev_fis *fis)
846 unsigned long task_file_data;
848 task_file_data = readl(port->mmio+PORT_TFDATA);
849 if ((task_file_data & 1))
852 if (fis->command == ATA_CMD_SEC_ERASE_PREP) {
853 port->ic_pause_timer = jiffies;
855 } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) &&
856 (fis->features == 0x03)) {
857 set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
858 port->ic_pause_timer = jiffies;
860 } else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) ||
861 ((fis->command == 0xFC) &&
862 (fis->features == 0x27 || fis->features == 0x72 ||
863 fis->features == 0x62 || fis->features == 0x26))) {
864 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
865 clear_bit(MTIP_DDF_REBUILD_FAILED_BIT, &port->dd->dd_flag);
866 /* Com reset after secure erase or lowlevel format */
867 mtip_restart_port(port);
868 clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
875 static bool mtip_commands_active(struct mtip_port *port)
881 * Ignore s_active bit 0 of array element 0.
882 * This bit will always be set
884 active = readl(port->s_active[0]) & 0xFFFFFFFE;
885 for (n = 1; n < port->dd->slot_groups; n++)
886 active |= readl(port->s_active[n]);
892 * Wait for port to quiesce
894 * @port Pointer to port data structure
895 * @timeout Max duration to wait (ms)
899 * -EBUSY Commands still active
901 static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
906 blk_mq_quiesce_queue(port->dd->queue);
908 to = jiffies + msecs_to_jiffies(timeout);
910 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) &&
911 test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
913 continue; /* svc thd is actively issuing commands */
918 if (mtip_check_surprise_removal(port->dd->pdev))
921 active = mtip_commands_active(port);
924 } while (time_before(jiffies, to));
926 blk_mq_unquiesce_queue(port->dd->queue);
927 return active ? -EBUSY : 0;
929 blk_mq_unquiesce_queue(port->dd->queue);
933 struct mtip_int_cmd {
941 * Execute an internal command and wait for the completion.
943 * @port Pointer to the port data structure.
944 * @fis Pointer to the FIS that describes the command.
945 * @fis_len Length in WORDS of the FIS.
946 * @buffer DMA accessible for command data.
947 * @buf_len Length, in bytes, of the data buffer.
948 * @opts Command header options, excluding the FIS length
949 * and the number of PRD entries.
950 * @timeout Time in ms to wait for the command to complete.
953 * 0 Command completed successfully.
954 * -EFAULT The buffer address is not correctly aligned.
955 * -EBUSY Internal command or other IO in progress.
956 * -EAGAIN Time out waiting for command to complete.
958 static int mtip_exec_internal_command(struct mtip_port *port,
959 struct host_to_dev_fis *fis,
964 unsigned long timeout)
966 struct mtip_cmd *int_cmd;
967 struct driver_data *dd = port->dd;
969 struct mtip_int_cmd icmd = {
977 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
978 if (buffer & 0x00000007) {
979 dev_err(&dd->pdev->dev, "SG buffer is not 8 byte aligned\n");
983 if (mtip_check_surprise_removal(dd->pdev))
986 rq = blk_mq_alloc_request(dd->queue, REQ_OP_DRV_IN, BLK_MQ_REQ_RESERVED);
988 dbg_printk(MTIP_DRV_NAME "Unable to allocate tag for PIO cmd\n");
992 set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
994 if (fis->command == ATA_CMD_SEC_ERASE_PREP)
995 set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
997 clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
999 if (fis->command != ATA_CMD_STANDBYNOW1) {
1000 /* wait for io to complete if non atomic */
1001 if (mtip_quiesce_io(port, MTIP_QUIESCE_IO_TIMEOUT_MS) < 0) {
1002 dev_warn(&dd->pdev->dev, "Failed to quiesce IO\n");
1003 blk_mq_free_request(rq);
1004 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
1005 wake_up_interruptible(&port->svc_wait);
1010 /* Copy the command to the command table */
1011 int_cmd = blk_mq_rq_to_pdu(rq);
1012 int_cmd->icmd = &icmd;
1013 memcpy(int_cmd->command, fis, fis_len*4);
1015 rq->timeout = timeout;
1017 /* insert request and run queue */
1018 blk_execute_rq(rq->q, NULL, rq, true);
1020 if (int_cmd->status) {
1021 dev_err(&dd->pdev->dev, "Internal command [%02X] failed %d\n",
1022 fis->command, int_cmd->status);
1025 if (mtip_check_surprise_removal(dd->pdev) ||
1026 test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
1028 dev_err(&dd->pdev->dev,
1029 "Internal command [%02X] wait returned due to SR\n",
1034 mtip_device_reset(dd); /* recover from timeout issue */
1039 if (readl(port->cmd_issue[MTIP_TAG_INDEX(MTIP_TAG_INTERNAL)])
1040 & (1 << MTIP_TAG_BIT(MTIP_TAG_INTERNAL))) {
1042 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
1043 mtip_device_reset(dd);
1048 /* Clear the allocated and active bits for the internal command. */
1049 blk_mq_free_request(rq);
1050 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
1051 if (rv >= 0 && mtip_pause_ncq(port, fis)) {
1055 wake_up_interruptible(&port->svc_wait);
1061 * Byte-swap ATA ID strings.
1063 * ATA identify data contains strings in byte-swapped 16-bit words.
1064 * They must be swapped (on all architectures) to be usable as C strings.
1065 * This function swaps bytes in-place.
1067 * @buf The buffer location of the string
1068 * @len The number of bytes to swap
1073 static inline void ata_swap_string(u16 *buf, unsigned int len)
1076 for (i = 0; i < (len/2); i++)
1077 be16_to_cpus(&buf[i]);
1080 static void mtip_set_timeout(struct driver_data *dd,
1081 struct host_to_dev_fis *fis,
1082 unsigned int *timeout, u8 erasemode)
1084 switch (fis->command) {
1085 case ATA_CMD_DOWNLOAD_MICRO:
1086 *timeout = 120000; /* 2 minutes */
1088 case ATA_CMD_SEC_ERASE_UNIT:
1091 *timeout = ((*(dd->port->identify + 90) * 2) * 60000);
1093 *timeout = ((*(dd->port->identify + 89) * 2) * 60000);
1095 case ATA_CMD_STANDBYNOW1:
1096 *timeout = 120000; /* 2 minutes */
1100 *timeout = 60000; /* 60 seconds */
1103 *timeout = 15000; /* 15 seconds */
1106 *timeout = MTIP_IOCTL_CMD_TIMEOUT_MS;
1112 * Request the device identity information.
1114 * If a user space buffer is not specified, i.e. is NULL, the
1115 * identify information is still read from the drive and placed
1116 * into the identify data buffer (@e port->identify) in the
1117 * port data structure.
1118 * When the identify buffer contains valid identify information @e
1119 * port->identify_valid is non-zero.
1121 * @port Pointer to the port structure.
1122 * @user_buffer A user space buffer where the identify data should be
1126 * 0 Command completed successfully.
1127 * -EFAULT An error occurred while coping data to the user buffer.
1128 * -1 Command failed.
1130 static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
1133 struct host_to_dev_fis fis;
1135 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
1138 /* Build the FIS. */
1139 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1142 fis.command = ATA_CMD_ID_ATA;
1144 /* Set the identify information as invalid. */
1145 port->identify_valid = 0;
1147 /* Clear the identify information. */
1148 memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS);
1150 /* Execute the command. */
1151 if (mtip_exec_internal_command(port,
1155 sizeof(u16) * ATA_ID_WORDS,
1157 MTIP_INT_CMD_TIMEOUT_MS)
1164 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1165 * perform field-sensitive swapping on the string fields.
1166 * See the kernel use of ata_id_string() for proof of this.
1168 #ifdef __LITTLE_ENDIAN
1169 ata_swap_string(port->identify + 27, 40); /* model string*/
1170 ata_swap_string(port->identify + 23, 8); /* firmware string*/
1171 ata_swap_string(port->identify + 10, 20); /* serial# string*/
1175 for (i = 0; i < ATA_ID_WORDS; i++)
1176 port->identify[i] = le16_to_cpu(port->identify[i]);
1180 /* Check security locked state */
1181 if (port->identify[128] & 0x4)
1182 set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
1184 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
1186 /* Set the identify buffer as valid. */
1187 port->identify_valid = 1;
1193 ATA_ID_WORDS * sizeof(u16))) {
1204 * Issue a standby immediate command to the device.
1206 * @port Pointer to the port structure.
1209 * 0 Command was executed successfully.
1210 * -1 An error occurred while executing the command.
1212 static int mtip_standby_immediate(struct mtip_port *port)
1215 struct host_to_dev_fis fis;
1216 unsigned long start;
1217 unsigned int timeout;
1219 /* Build the FIS. */
1220 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1223 fis.command = ATA_CMD_STANDBYNOW1;
1225 mtip_set_timeout(port->dd, &fis, &timeout, 0);
1228 rv = mtip_exec_internal_command(port,
1235 dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n",
1236 jiffies_to_msecs(jiffies - start));
1238 dev_warn(&port->dd->pdev->dev,
1239 "STANDBY IMMEDIATE command failed.\n");
1245 * Issue a READ LOG EXT command to the device.
1247 * @port pointer to the port structure.
1248 * @page page number to fetch
1249 * @buffer pointer to buffer
1250 * @buffer_dma dma address corresponding to @buffer
1251 * @sectors page length to fetch, in sectors
1254 * @rv return value from mtip_exec_internal_command()
1256 static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
1257 dma_addr_t buffer_dma, unsigned int sectors)
1259 struct host_to_dev_fis fis;
1261 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1264 fis.command = ATA_CMD_READ_LOG_EXT;
1265 fis.sect_count = sectors & 0xFF;
1266 fis.sect_cnt_ex = (sectors >> 8) & 0xFF;
1269 fis.device = ATA_DEVICE_OBS;
1271 memset(buffer, 0, sectors * ATA_SECT_SIZE);
1273 return mtip_exec_internal_command(port,
1277 sectors * ATA_SECT_SIZE,
1279 MTIP_INT_CMD_TIMEOUT_MS);
1283 * Issue a SMART READ DATA command to the device.
1285 * @port pointer to the port structure.
1286 * @buffer pointer to buffer
1287 * @buffer_dma dma address corresponding to @buffer
1290 * @rv return value from mtip_exec_internal_command()
1292 static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer,
1293 dma_addr_t buffer_dma)
1295 struct host_to_dev_fis fis;
1297 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1300 fis.command = ATA_CMD_SMART;
1301 fis.features = 0xD0;
1305 fis.device = ATA_DEVICE_OBS;
1307 return mtip_exec_internal_command(port,
1317 * Get the value of a smart attribute
1319 * @port pointer to the port structure
1320 * @id attribute number
1321 * @attrib pointer to return attrib information corresponding to @id
1324 * -EINVAL NULL buffer passed or unsupported attribute @id.
1325 * -EPERM Identify data not valid, SMART not supported or not enabled
1327 static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
1328 struct smart_attr *attrib)
1331 struct smart_attr *pattr;
1336 if (!port->identify_valid) {
1337 dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n");
1340 if (!(port->identify[82] & 0x1)) {
1341 dev_warn(&port->dd->pdev->dev, "SMART not supported\n");
1344 if (!(port->identify[85] & 0x1)) {
1345 dev_warn(&port->dd->pdev->dev, "SMART not enabled\n");
1349 memset(port->smart_buf, 0, ATA_SECT_SIZE);
1350 rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma);
1352 dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n");
1356 pattr = (struct smart_attr *)(port->smart_buf + 2);
1357 for (i = 0; i < 29; i++, pattr++)
1358 if (pattr->attr_id == id) {
1359 memcpy(attrib, pattr, sizeof(struct smart_attr));
1364 dev_warn(&port->dd->pdev->dev,
1365 "Query for invalid SMART attribute ID\n");
1373 * Get the drive capacity.
1375 * @dd Pointer to the device data structure.
1376 * @sectors Pointer to the variable that will receive the sector count.
1379 * 1 Capacity was returned successfully.
1380 * 0 The identify information is invalid.
1382 static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors)
1384 struct mtip_port *port = dd->port;
1385 u64 total, raw0, raw1, raw2, raw3;
1386 raw0 = port->identify[100];
1387 raw1 = port->identify[101];
1388 raw2 = port->identify[102];
1389 raw3 = port->identify[103];
1390 total = raw0 | raw1<<16 | raw2<<32 | raw3<<48;
1392 return (bool) !!port->identify_valid;
1396 * Display the identify command data.
1398 * @port Pointer to the port data structure.
1403 static void mtip_dump_identify(struct mtip_port *port)
1406 unsigned short revid;
1409 if (!port->identify_valid)
1412 strlcpy(cbuf, (char *)(port->identify+10), 21);
1413 dev_info(&port->dd->pdev->dev,
1414 "Serial No.: %s\n", cbuf);
1416 strlcpy(cbuf, (char *)(port->identify+23), 9);
1417 dev_info(&port->dd->pdev->dev,
1418 "Firmware Ver.: %s\n", cbuf);
1420 strlcpy(cbuf, (char *)(port->identify+27), 41);
1421 dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf);
1423 dev_info(&port->dd->pdev->dev, "Security: %04x %s\n",
1424 port->identify[128],
1425 port->identify[128] & 0x4 ? "(LOCKED)" : "");
1427 if (mtip_hw_get_capacity(port->dd, §ors))
1428 dev_info(&port->dd->pdev->dev,
1429 "Capacity: %llu sectors (%llu MB)\n",
1431 ((u64)sectors) * ATA_SECT_SIZE >> 20);
1433 pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid);
1434 switch (revid & 0xFF) {
1436 strlcpy(cbuf, "A0", 3);
1439 strlcpy(cbuf, "A2", 3);
1442 strlcpy(cbuf, "?", 2);
1445 dev_info(&port->dd->pdev->dev,
1446 "Card Type: %s\n", cbuf);
1450 * Map the commands scatter list into the command table.
1452 * @command Pointer to the command.
1453 * @nents Number of scatter list entries.
1458 static inline void fill_command_sg(struct driver_data *dd,
1459 struct mtip_cmd *command,
1463 unsigned int dma_len;
1464 struct mtip_cmd_sg *command_sg;
1465 struct scatterlist *sg;
1467 command_sg = command->command + AHCI_CMD_TBL_HDR_SZ;
1469 for_each_sg(command->sg, sg, nents, n) {
1470 dma_len = sg_dma_len(sg);
1471 if (dma_len > 0x400000)
1472 dev_err(&dd->pdev->dev,
1473 "DMA segment length truncated\n");
1474 command_sg->info = cpu_to_le32((dma_len-1) & 0x3FFFFF);
1475 command_sg->dba = cpu_to_le32(sg_dma_address(sg));
1476 command_sg->dba_upper =
1477 cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
1483 * @brief Execute a drive command.
1485 * return value 0 The command completed successfully.
1486 * return value -1 An error occurred while executing the command.
1488 static int exec_drive_task(struct mtip_port *port, u8 *command)
1490 struct host_to_dev_fis fis;
1491 struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG);
1494 /* Build the FIS. */
1495 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1498 fis.command = command[0];
1499 fis.features = command[1];
1500 fis.sect_count = command[2];
1501 fis.sector = command[3];
1502 fis.cyl_low = command[4];
1503 fis.cyl_hi = command[5];
1504 fis.device = command[6] & ~0x10; /* Clear the dev bit*/
1506 mtip_set_timeout(port->dd, &fis, &to, 0);
1508 dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
1518 /* Execute the command. */
1519 if (mtip_exec_internal_command(port,
1529 command[0] = reply->command; /* Status*/
1530 command[1] = reply->features; /* Error*/
1531 command[4] = reply->cyl_low;
1532 command[5] = reply->cyl_hi;
1534 dbg_printk(MTIP_DRV_NAME " %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
1545 * @brief Execute a drive command.
1547 * @param port Pointer to the port data structure.
1548 * @param command Pointer to the user specified command parameters.
1549 * @param user_buffer Pointer to the user space buffer where read sector
1550 * data should be copied.
1552 * return value 0 The command completed successfully.
1553 * return value -EFAULT An error occurred while copying the completion
1554 * data to the user space buffer.
1555 * return value -1 An error occurred while executing the command.
1557 static int exec_drive_command(struct mtip_port *port, u8 *command,
1558 void __user *user_buffer)
1560 struct host_to_dev_fis fis;
1561 struct host_to_dev_fis *reply;
1563 dma_addr_t dma_addr = 0;
1564 int rv = 0, xfer_sz = command[3];
1571 buf = dma_alloc_coherent(&port->dd->pdev->dev,
1572 ATA_SECT_SIZE * xfer_sz,
1576 dev_err(&port->dd->pdev->dev,
1577 "Memory allocation failed (%d bytes)\n",
1578 ATA_SECT_SIZE * xfer_sz);
1583 /* Build the FIS. */
1584 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1587 fis.command = command[0];
1588 fis.features = command[2];
1589 fis.sect_count = command[3];
1590 if (fis.command == ATA_CMD_SMART) {
1591 fis.sector = command[1];
1596 mtip_set_timeout(port->dd, &fis, &to, 0);
1599 reply = (port->rxfis + RX_FIS_PIO_SETUP);
1601 reply = (port->rxfis + RX_FIS_D2H_REG);
1603 dbg_printk(MTIP_DRV_NAME
1604 " %s: User Command: cmd %x, sect %x, "
1605 "feat %x, sectcnt %x\n",
1612 /* Execute the command. */
1613 if (mtip_exec_internal_command(port,
1616 (xfer_sz ? dma_addr : 0),
1617 (xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0),
1622 goto exit_drive_command;
1625 /* Collect the completion status. */
1626 command[0] = reply->command; /* Status*/
1627 command[1] = reply->features; /* Error*/
1628 command[2] = reply->sect_count;
1630 dbg_printk(MTIP_DRV_NAME
1631 " %s: Completion Status: stat %x, "
1632 "err %x, nsect %x\n",
1639 if (copy_to_user(user_buffer,
1641 ATA_SECT_SIZE * command[3])) {
1643 goto exit_drive_command;
1648 dma_free_coherent(&port->dd->pdev->dev,
1649 ATA_SECT_SIZE * xfer_sz, buf, dma_addr);
1654 * Indicates whether a command has a single sector payload.
1656 * @command passed to the device to perform the certain event.
1657 * @features passed to the device to perform the certain event.
1660 * 1 command is one that always has a single sector payload,
1661 * regardless of the value in the Sector Count field.
1665 static unsigned int implicit_sector(unsigned char command,
1666 unsigned char features)
1668 unsigned int rv = 0;
1670 /* list of commands that have an implicit sector count of 1 */
1672 case ATA_CMD_SEC_SET_PASS:
1673 case ATA_CMD_SEC_UNLOCK:
1674 case ATA_CMD_SEC_ERASE_PREP:
1675 case ATA_CMD_SEC_ERASE_UNIT:
1676 case ATA_CMD_SEC_FREEZE_LOCK:
1677 case ATA_CMD_SEC_DISABLE_PASS:
1678 case ATA_CMD_PMP_READ:
1679 case ATA_CMD_PMP_WRITE:
1682 case ATA_CMD_SET_MAX:
1683 if (features == ATA_SET_MAX_UNLOCK)
1687 if ((features == ATA_SMART_READ_VALUES) ||
1688 (features == ATA_SMART_READ_THRESHOLDS))
1691 case ATA_CMD_CONF_OVERLAY:
1692 if ((features == ATA_DCO_IDENTIFY) ||
1693 (features == ATA_DCO_SET))
1701 * Executes a taskfile
1702 * See ide_taskfile_ioctl() for derivation
1704 static int exec_drive_taskfile(struct driver_data *dd,
1706 ide_task_request_t *req_task,
1709 struct host_to_dev_fis fis;
1710 struct host_to_dev_fis *reply;
1713 dma_addr_t outbuf_dma = 0;
1714 dma_addr_t inbuf_dma = 0;
1715 dma_addr_t dma_buffer = 0;
1717 unsigned int taskin = 0;
1718 unsigned int taskout = 0;
1720 unsigned int timeout;
1721 unsigned int force_single_sector;
1722 unsigned int transfer_size;
1723 unsigned long task_file_data;
1724 int intotal = outtotal + req_task->out_size;
1727 taskout = req_task->out_size;
1728 taskin = req_task->in_size;
1729 /* 130560 = 512 * 0xFF*/
1730 if (taskin > 130560 || taskout > 130560)
1734 outbuf = memdup_user(buf + outtotal, taskout);
1736 return PTR_ERR(outbuf);
1738 outbuf_dma = dma_map_single(&dd->pdev->dev, outbuf,
1739 taskout, DMA_TO_DEVICE);
1740 if (dma_mapping_error(&dd->pdev->dev, outbuf_dma)) {
1744 dma_buffer = outbuf_dma;
1748 inbuf = memdup_user(buf + intotal, taskin);
1749 if (IS_ERR(inbuf)) {
1750 err = PTR_ERR(inbuf);
1754 inbuf_dma = dma_map_single(&dd->pdev->dev, inbuf,
1755 taskin, DMA_FROM_DEVICE);
1756 if (dma_mapping_error(&dd->pdev->dev, inbuf_dma)) {
1760 dma_buffer = inbuf_dma;
1763 /* only supports PIO and non-data commands from this ioctl. */
1764 switch (req_task->data_phase) {
1766 nsect = taskout / ATA_SECT_SIZE;
1767 reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
1770 reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
1772 case TASKFILE_NO_DATA:
1773 reply = (dd->port->rxfis + RX_FIS_D2H_REG);
1780 /* Build the FIS. */
1781 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1785 fis.command = req_task->io_ports[7];
1786 fis.features = req_task->io_ports[1];
1787 fis.sect_count = req_task->io_ports[2];
1788 fis.lba_low = req_task->io_ports[3];
1789 fis.lba_mid = req_task->io_ports[4];
1790 fis.lba_hi = req_task->io_ports[5];
1791 /* Clear the dev bit*/
1792 fis.device = req_task->io_ports[6] & ~0x10;
1794 if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) {
1795 req_task->in_flags.all =
1796 IDE_TASKFILE_STD_IN_FLAGS |
1797 (IDE_HOB_STD_IN_FLAGS << 8);
1798 fis.lba_low_ex = req_task->hob_ports[3];
1799 fis.lba_mid_ex = req_task->hob_ports[4];
1800 fis.lba_hi_ex = req_task->hob_ports[5];
1801 fis.features_ex = req_task->hob_ports[1];
1802 fis.sect_cnt_ex = req_task->hob_ports[2];
1805 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
1808 force_single_sector = implicit_sector(fis.command, fis.features);
1810 if ((taskin || taskout) && (!fis.sect_count)) {
1812 fis.sect_count = nsect;
1814 if (!force_single_sector) {
1815 dev_warn(&dd->pdev->dev,
1816 "data movement but "
1817 "sect_count is 0\n");
1824 dbg_printk(MTIP_DRV_NAME
1825 " %s: cmd %x, feat %x, nsect %x,"
1826 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
1837 /* check for erase mode support during secure erase.*/
1838 if ((fis.command == ATA_CMD_SEC_ERASE_UNIT) && outbuf &&
1839 (outbuf[0] & MTIP_SEC_ERASE_MODE)) {
1843 mtip_set_timeout(dd, &fis, &timeout, erasemode);
1845 /* Determine the correct transfer size.*/
1846 if (force_single_sector)
1847 transfer_size = ATA_SECT_SIZE;
1849 transfer_size = ATA_SECT_SIZE * fis.sect_count;
1851 /* Execute the command.*/
1852 if (mtip_exec_internal_command(dd->port,
1863 task_file_data = readl(dd->port->mmio+PORT_TFDATA);
1865 if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) {
1866 reply = dd->port->rxfis + RX_FIS_PIO_SETUP;
1867 req_task->io_ports[7] = reply->control;
1869 reply = dd->port->rxfis + RX_FIS_D2H_REG;
1870 req_task->io_ports[7] = reply->command;
1873 /* reclaim the DMA buffers.*/
1875 dma_unmap_single(&dd->pdev->dev, inbuf_dma, taskin,
1878 dma_unmap_single(&dd->pdev->dev, outbuf_dma, taskout,
1883 /* return the ATA registers to the caller.*/
1884 req_task->io_ports[1] = reply->features;
1885 req_task->io_ports[2] = reply->sect_count;
1886 req_task->io_ports[3] = reply->lba_low;
1887 req_task->io_ports[4] = reply->lba_mid;
1888 req_task->io_ports[5] = reply->lba_hi;
1889 req_task->io_ports[6] = reply->device;
1891 if (req_task->out_flags.all & 1) {
1893 req_task->hob_ports[3] = reply->lba_low_ex;
1894 req_task->hob_ports[4] = reply->lba_mid_ex;
1895 req_task->hob_ports[5] = reply->lba_hi_ex;
1896 req_task->hob_ports[1] = reply->features_ex;
1897 req_task->hob_ports[2] = reply->sect_cnt_ex;
1899 dbg_printk(MTIP_DRV_NAME
1900 " %s: Completion: stat %x,"
1901 "err %x, sect_cnt %x, lbalo %x,"
1902 "lbamid %x, lbahi %x, dev %x\n",
1904 req_task->io_ports[7],
1905 req_task->io_ports[1],
1906 req_task->io_ports[2],
1907 req_task->io_ports[3],
1908 req_task->io_ports[4],
1909 req_task->io_ports[5],
1910 req_task->io_ports[6]);
1913 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
1919 if (copy_to_user(buf + intotal, inbuf, taskin)) {
1926 dma_unmap_single(&dd->pdev->dev, inbuf_dma, taskin,
1929 dma_unmap_single(&dd->pdev->dev, outbuf_dma, taskout,
1938 * Handle IOCTL calls from the Block Layer.
1940 * This function is called by the Block Layer when it receives an IOCTL
1941 * command that it does not understand. If the IOCTL command is not supported
1942 * this function returns -ENOTTY.
1944 * @dd Pointer to the driver data structure.
1945 * @cmd IOCTL command passed from the Block Layer.
1946 * @arg IOCTL argument passed from the Block Layer.
1949 * 0 The IOCTL completed successfully.
1950 * -ENOTTY The specified command is not supported.
1951 * -EFAULT An error occurred copying data to a user space buffer.
1952 * -EIO An error occurred while executing the command.
1954 static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd,
1958 case HDIO_GET_IDENTITY:
1960 if (copy_to_user((void __user *)arg, dd->port->identify,
1961 sizeof(u16) * ATA_ID_WORDS))
1965 case HDIO_DRIVE_CMD:
1967 u8 drive_command[4];
1969 /* Copy the user command info to our buffer. */
1970 if (copy_from_user(drive_command,
1971 (void __user *) arg,
1972 sizeof(drive_command)))
1975 /* Execute the drive command. */
1976 if (exec_drive_command(dd->port,
1978 (void __user *) (arg+4)))
1981 /* Copy the status back to the users buffer. */
1982 if (copy_to_user((void __user *) arg,
1984 sizeof(drive_command)))
1989 case HDIO_DRIVE_TASK:
1991 u8 drive_command[7];
1993 /* Copy the user command info to our buffer. */
1994 if (copy_from_user(drive_command,
1995 (void __user *) arg,
1996 sizeof(drive_command)))
1999 /* Execute the drive command. */
2000 if (exec_drive_task(dd->port, drive_command))
2003 /* Copy the status back to the users buffer. */
2004 if (copy_to_user((void __user *) arg,
2006 sizeof(drive_command)))
2011 case HDIO_DRIVE_TASKFILE: {
2012 ide_task_request_t req_task;
2015 if (copy_from_user(&req_task, (void __user *) arg,
2019 outtotal = sizeof(req_task);
2021 ret = exec_drive_taskfile(dd, (void __user *) arg,
2022 &req_task, outtotal);
2024 if (copy_to_user((void __user *) arg, &req_task,
2038 * Submit an IO to the hw
2040 * This function is called by the block layer to issue an io
2041 * to the device. Upon completion, the callback function will
2042 * be called with the data parameter passed as the callback data.
2044 * @dd Pointer to the driver data structure.
2045 * @start First sector to read.
2046 * @nsect Number of sectors to read.
2047 * @tag The tag of this read command.
2048 * @callback Pointer to the function that should be called
2049 * when the read completes.
2050 * @data Callback data passed to the callback function
2051 * when the read completes.
2052 * @dir Direction (read or write)
2057 static void mtip_hw_submit_io(struct driver_data *dd, struct request *rq,
2058 struct mtip_cmd *command,
2059 struct blk_mq_hw_ctx *hctx)
2061 struct mtip_cmd_hdr *hdr =
2062 dd->port->command_list + sizeof(struct mtip_cmd_hdr) * rq->tag;
2063 struct host_to_dev_fis *fis;
2064 struct mtip_port *port = dd->port;
2065 int dma_dir = rq_data_dir(rq) == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
2066 u64 start = blk_rq_pos(rq);
2067 unsigned int nsect = blk_rq_sectors(rq);
2070 /* Map the scatter list for DMA access */
2071 nents = blk_rq_map_sg(hctx->queue, rq, command->sg);
2072 nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir);
2074 prefetch(&port->flags);
2076 command->scatter_ents = nents;
2079 * The number of retries for this command before it is
2080 * reported as a failure to the upper layers.
2082 command->retries = MTIP_MAX_RETRIES;
2085 fis = command->command;
2088 if (dma_dir == DMA_FROM_DEVICE)
2089 fis->command = ATA_CMD_FPDMA_READ;
2091 fis->command = ATA_CMD_FPDMA_WRITE;
2092 fis->lba_low = start & 0xFF;
2093 fis->lba_mid = (start >> 8) & 0xFF;
2094 fis->lba_hi = (start >> 16) & 0xFF;
2095 fis->lba_low_ex = (start >> 24) & 0xFF;
2096 fis->lba_mid_ex = (start >> 32) & 0xFF;
2097 fis->lba_hi_ex = (start >> 40) & 0xFF;
2098 fis->device = 1 << 6;
2099 fis->features = nsect & 0xFF;
2100 fis->features_ex = (nsect >> 8) & 0xFF;
2101 fis->sect_count = ((rq->tag << 3) | (rq->tag >> 5));
2102 fis->sect_cnt_ex = 0;
2106 fill_command_sg(dd, command, nents);
2108 if (unlikely(command->unaligned))
2109 fis->device |= 1 << 7;
2111 /* Populate the command header */
2112 hdr->ctba = cpu_to_le32(command->command_dma & 0xFFFFFFFF);
2113 if (test_bit(MTIP_PF_HOST_CAP_64, &dd->port->flags))
2114 hdr->ctbau = cpu_to_le32((command->command_dma >> 16) >> 16);
2115 hdr->opts = cpu_to_le32((nents << 16) | 5 | AHCI_CMD_PREFETCH);
2116 hdr->byte_count = 0;
2118 command->direction = dma_dir;
2121 * To prevent this command from being issued
2122 * if an internal command is in progress or error handling is active.
2124 if (unlikely(port->flags & MTIP_PF_PAUSE_IO)) {
2125 set_bit(rq->tag, port->cmds_to_issue);
2126 set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
2130 /* Issue the command to the hardware */
2131 mtip_issue_ncq_command(port, rq->tag);
2135 * Sysfs status dump.
2137 * @dev Pointer to the device structure, passed by the kernrel.
2138 * @attr Pointer to the device_attribute structure passed by the kernel.
2139 * @buf Pointer to the char buffer that will receive the stats info.
2142 * The size, in bytes, of the data copied into buf.
2144 static ssize_t mtip_hw_show_status(struct device *dev,
2145 struct device_attribute *attr,
2148 struct driver_data *dd = dev_to_disk(dev)->private_data;
2151 if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))
2152 size += sprintf(buf, "%s", "thermal_shutdown\n");
2153 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag))
2154 size += sprintf(buf, "%s", "write_protect\n");
2156 size += sprintf(buf, "%s", "online\n");
2161 static DEVICE_ATTR(status, 0444, mtip_hw_show_status, NULL);
2163 /* debugsfs entries */
2165 static ssize_t show_device_status(struct device_driver *drv, char *buf)
2168 struct driver_data *dd, *tmp;
2169 unsigned long flags;
2173 spin_lock_irqsave(&dev_lock, flags);
2174 size += sprintf(&buf[size], "Devices Present:\n");
2175 list_for_each_entry_safe(dd, tmp, &online_list, online_list) {
2178 dd->port->identify &&
2179 dd->port->identify_valid) {
2181 (char *) (dd->port->identify + 10), 21);
2182 status = *(dd->port->identify + 141);
2184 memset(id_buf, 0, 42);
2189 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
2190 size += sprintf(&buf[size],
2191 " device %s %s (ftl rebuild %d %%)\n",
2192 dev_name(&dd->pdev->dev),
2196 size += sprintf(&buf[size],
2198 dev_name(&dd->pdev->dev),
2204 size += sprintf(&buf[size], "Devices Being Removed:\n");
2205 list_for_each_entry_safe(dd, tmp, &removing_list, remove_list) {
2208 dd->port->identify &&
2209 dd->port->identify_valid) {
2211 (char *) (dd->port->identify+10), 21);
2212 status = *(dd->port->identify + 141);
2214 memset(id_buf, 0, 42);
2219 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
2220 size += sprintf(&buf[size],
2221 " device %s %s (ftl rebuild %d %%)\n",
2222 dev_name(&dd->pdev->dev),
2226 size += sprintf(&buf[size],
2228 dev_name(&dd->pdev->dev),
2233 spin_unlock_irqrestore(&dev_lock, flags);
2238 static ssize_t mtip_hw_read_device_status(struct file *f, char __user *ubuf,
2239 size_t len, loff_t *offset)
2241 struct driver_data *dd = (struct driver_data *)f->private_data;
2246 if (!len || *offset)
2249 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
2251 dev_err(&dd->pdev->dev,
2252 "Memory allocation: status buffer\n");
2256 size += show_device_status(NULL, buf);
2258 *offset = size <= len ? size : len;
2259 size = copy_to_user(ubuf, buf, *offset);
2264 return rv ? rv : *offset;
2267 static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf,
2268 size_t len, loff_t *offset)
2270 struct driver_data *dd = (struct driver_data *)f->private_data;
2272 u32 group_allocated;
2279 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
2281 dev_err(&dd->pdev->dev,
2282 "Memory allocation: register buffer\n");
2286 size += sprintf(&buf[size], "H/ S ACTive : [ 0x");
2288 for (n = dd->slot_groups-1; n >= 0; n--)
2289 size += sprintf(&buf[size], "%08X ",
2290 readl(dd->port->s_active[n]));
2292 size += sprintf(&buf[size], "]\n");
2293 size += sprintf(&buf[size], "H/ Command Issue : [ 0x");
2295 for (n = dd->slot_groups-1; n >= 0; n--)
2296 size += sprintf(&buf[size], "%08X ",
2297 readl(dd->port->cmd_issue[n]));
2299 size += sprintf(&buf[size], "]\n");
2300 size += sprintf(&buf[size], "H/ Completed : [ 0x");
2302 for (n = dd->slot_groups-1; n >= 0; n--)
2303 size += sprintf(&buf[size], "%08X ",
2304 readl(dd->port->completed[n]));
2306 size += sprintf(&buf[size], "]\n");
2307 size += sprintf(&buf[size], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
2308 readl(dd->port->mmio + PORT_IRQ_STAT));
2309 size += sprintf(&buf[size], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
2310 readl(dd->mmio + HOST_IRQ_STAT));
2311 size += sprintf(&buf[size], "\n");
2313 size += sprintf(&buf[size], "L/ Commands in Q : [ 0x");
2315 for (n = dd->slot_groups-1; n >= 0; n--) {
2316 if (sizeof(long) > sizeof(u32))
2318 dd->port->cmds_to_issue[n/2] >> (32*(n&1));
2320 group_allocated = dd->port->cmds_to_issue[n];
2321 size += sprintf(&buf[size], "%08X ", group_allocated);
2323 size += sprintf(&buf[size], "]\n");
2325 *offset = size <= len ? size : len;
2326 size = copy_to_user(ubuf, buf, *offset);
2331 return rv ? rv : *offset;
2334 static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf,
2335 size_t len, loff_t *offset)
2337 struct driver_data *dd = (struct driver_data *)f->private_data;
2345 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
2347 dev_err(&dd->pdev->dev,
2348 "Memory allocation: flag buffer\n");
2352 size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n",
2354 size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n",
2357 *offset = size <= len ? size : len;
2358 size = copy_to_user(ubuf, buf, *offset);
2363 return rv ? rv : *offset;
2366 static const struct file_operations mtip_device_status_fops = {
2367 .owner = THIS_MODULE,
2368 .open = simple_open,
2369 .read = mtip_hw_read_device_status,
2370 .llseek = no_llseek,
2373 static const struct file_operations mtip_regs_fops = {
2374 .owner = THIS_MODULE,
2375 .open = simple_open,
2376 .read = mtip_hw_read_registers,
2377 .llseek = no_llseek,
2380 static const struct file_operations mtip_flags_fops = {
2381 .owner = THIS_MODULE,
2382 .open = simple_open,
2383 .read = mtip_hw_read_flags,
2384 .llseek = no_llseek,
2388 * Create the sysfs related attributes.
2390 * @dd Pointer to the driver data structure.
2391 * @kobj Pointer to the kobj for the block device.
2394 * 0 Operation completed successfully.
2395 * -EINVAL Invalid parameter.
2397 static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj)
2402 if (sysfs_create_file(kobj, &dev_attr_status.attr))
2403 dev_warn(&dd->pdev->dev,
2404 "Error creating 'status' sysfs entry\n");
2409 * Remove the sysfs related attributes.
2411 * @dd Pointer to the driver data structure.
2412 * @kobj Pointer to the kobj for the block device.
2415 * 0 Operation completed successfully.
2416 * -EINVAL Invalid parameter.
2418 static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj)
2423 sysfs_remove_file(kobj, &dev_attr_status.attr);
2428 static int mtip_hw_debugfs_init(struct driver_data *dd)
2433 dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent);
2434 if (IS_ERR_OR_NULL(dd->dfs_node)) {
2435 dev_warn(&dd->pdev->dev,
2436 "Error creating node %s under debugfs\n",
2437 dd->disk->disk_name);
2438 dd->dfs_node = NULL;
2442 debugfs_create_file("flags", 0444, dd->dfs_node, dd, &mtip_flags_fops);
2443 debugfs_create_file("registers", 0444, dd->dfs_node, dd,
2449 static void mtip_hw_debugfs_exit(struct driver_data *dd)
2451 debugfs_remove_recursive(dd->dfs_node);
2455 * Perform any init/resume time hardware setup
2457 * @dd Pointer to the driver data structure.
2462 static inline void hba_setup(struct driver_data *dd)
2465 hwdata = readl(dd->mmio + HOST_HSORG);
2467 /* interrupt bug workaround: use only 1 IS bit.*/
2469 HSORG_DISABLE_SLOTGRP_INTR |
2470 HSORG_DISABLE_SLOTGRP_PXIS,
2471 dd->mmio + HOST_HSORG);
2474 static int mtip_device_unaligned_constrained(struct driver_data *dd)
2476 return (dd->pdev->device == P420M_DEVICE_ID ? 1 : 0);
2480 * Detect the details of the product, and store anything needed
2481 * into the driver data structure. This includes product type and
2482 * version and number of slot groups.
2484 * @dd Pointer to the driver data structure.
2489 static void mtip_detect_product(struct driver_data *dd)
2492 unsigned int rev, slotgroups;
2495 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
2497 * [15:8] hardware/software interface rev#
2498 * [ 3] asic-style interface
2499 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
2501 hwdata = readl(dd->mmio + HOST_HSORG);
2503 dd->product_type = MTIP_PRODUCT_UNKNOWN;
2504 dd->slot_groups = 1;
2507 dd->product_type = MTIP_PRODUCT_ASICFPGA;
2508 rev = (hwdata & HSORG_HWREV) >> 8;
2509 slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1;
2510 dev_info(&dd->pdev->dev,
2511 "ASIC-FPGA design, HS rev 0x%x, "
2512 "%i slot groups [%i slots]\n",
2517 if (slotgroups > MTIP_MAX_SLOT_GROUPS) {
2518 dev_warn(&dd->pdev->dev,
2519 "Warning: driver only supports "
2520 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS);
2521 slotgroups = MTIP_MAX_SLOT_GROUPS;
2523 dd->slot_groups = slotgroups;
2527 dev_warn(&dd->pdev->dev, "Unrecognized product id\n");
2531 * Blocking wait for FTL rebuild to complete
2533 * @dd Pointer to the DRIVER_DATA structure.
2536 * 0 FTL rebuild completed successfully
2537 * -EFAULT FTL rebuild error/timeout/interruption
2539 static int mtip_ftl_rebuild_poll(struct driver_data *dd)
2541 unsigned long timeout, cnt = 0, start;
2543 dev_warn(&dd->pdev->dev,
2544 "FTL rebuild in progress. Polling for completion.\n");
2547 timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS);
2550 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
2553 if (mtip_check_surprise_removal(dd->pdev))
2556 if (mtip_get_identify(dd->port, NULL) < 0)
2559 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
2560 MTIP_FTL_REBUILD_MAGIC) {
2562 /* Print message every 3 minutes */
2564 dev_warn(&dd->pdev->dev,
2565 "FTL rebuild in progress (%d secs).\n",
2566 jiffies_to_msecs(jiffies - start) / 1000);
2570 dev_warn(&dd->pdev->dev,
2571 "FTL rebuild complete (%d secs).\n",
2572 jiffies_to_msecs(jiffies - start) / 1000);
2573 mtip_block_initialize(dd);
2576 } while (time_before(jiffies, timeout));
2578 /* Check for timeout */
2579 dev_err(&dd->pdev->dev,
2580 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
2581 jiffies_to_msecs(jiffies - start) / 1000);
2585 static void mtip_softirq_done_fn(struct request *rq)
2587 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
2588 struct driver_data *dd = rq->q->queuedata;
2590 /* Unmap the DMA scatter list entries */
2591 dma_unmap_sg(&dd->pdev->dev, cmd->sg, cmd->scatter_ents,
2594 if (unlikely(cmd->unaligned))
2595 atomic_inc(&dd->port->cmd_slot_unal);
2597 blk_mq_end_request(rq, cmd->status);
2600 static bool mtip_abort_cmd(struct request *req, void *data, bool reserved)
2602 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req);
2603 struct driver_data *dd = data;
2605 dbg_printk(MTIP_DRV_NAME " Aborting request, tag = %d\n", req->tag);
2607 clear_bit(req->tag, dd->port->cmds_to_issue);
2608 cmd->status = BLK_STS_IOERR;
2609 mtip_softirq_done_fn(req);
2613 static bool mtip_queue_cmd(struct request *req, void *data, bool reserved)
2615 struct driver_data *dd = data;
2617 set_bit(req->tag, dd->port->cmds_to_issue);
2618 blk_abort_request(req);
2623 * service thread to issue queued commands
2625 * @data Pointer to the driver data structure.
2631 static int mtip_service_thread(void *data)
2633 struct driver_data *dd = (struct driver_data *)data;
2634 unsigned long slot, slot_start, slot_wrap, to;
2635 unsigned int num_cmd_slots = dd->slot_groups * 32;
2636 struct mtip_port *port = dd->port;
2639 if (kthread_should_stop() ||
2640 test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
2642 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
2645 * the condition is to check neither an internal command is
2646 * is in progress nor error handling is active
2648 wait_event_interruptible(port->svc_wait, (port->flags) &&
2649 (port->flags & MTIP_PF_SVC_THD_WORK));
2651 if (kthread_should_stop() ||
2652 test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
2655 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
2659 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
2662 /* Demux bits: start with error handling */
2663 if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) {
2664 mtip_handle_tfe(dd);
2665 clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
2668 if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags))
2671 if (test_bit(MTIP_PF_TO_ACTIVE_BIT, &port->flags)) {
2672 to = jiffies + msecs_to_jiffies(5000);
2676 } while (atomic_read(&dd->irq_workers_active) != 0 &&
2677 time_before(jiffies, to));
2679 if (atomic_read(&dd->irq_workers_active) != 0)
2680 dev_warn(&dd->pdev->dev,
2681 "Completion workers still active!");
2683 blk_mq_quiesce_queue(dd->queue);
2685 blk_mq_tagset_busy_iter(&dd->tags, mtip_queue_cmd, dd);
2687 set_bit(MTIP_PF_ISSUE_CMDS_BIT, &dd->port->flags);
2689 if (mtip_device_reset(dd))
2690 blk_mq_tagset_busy_iter(&dd->tags,
2691 mtip_abort_cmd, dd);
2693 clear_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags);
2695 blk_mq_unquiesce_queue(dd->queue);
2698 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
2700 /* used to restrict the loop to one iteration */
2701 slot_start = num_cmd_slots;
2704 slot = find_next_bit(port->cmds_to_issue,
2705 num_cmd_slots, slot);
2706 if (slot_wrap == 1) {
2707 if ((slot_start >= slot) ||
2708 (slot >= num_cmd_slots))
2711 if (unlikely(slot_start == num_cmd_slots))
2714 if (unlikely(slot == num_cmd_slots)) {
2720 /* Issue the command to the hardware */
2721 mtip_issue_ncq_command(port, slot);
2723 clear_bit(slot, port->cmds_to_issue);
2726 clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
2729 if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) {
2730 if (mtip_ftl_rebuild_poll(dd) == 0)
2731 clear_bit(MTIP_PF_REBUILD_BIT, &port->flags);
2740 * DMA region teardown
2742 * @dd Pointer to driver_data structure
2747 static void mtip_dma_free(struct driver_data *dd)
2749 struct mtip_port *port = dd->port;
2752 dma_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
2753 port->block1, port->block1_dma);
2755 if (port->command_list) {
2756 dma_free_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ,
2757 port->command_list, port->command_list_dma);
2764 * @dd Pointer to driver_data structure
2767 * -ENOMEM Not enough free DMA region space to initialize driver
2769 static int mtip_dma_alloc(struct driver_data *dd)
2771 struct mtip_port *port = dd->port;
2773 /* Allocate dma memory for RX Fis, Identify, and Sector Bufffer */
2775 dma_alloc_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
2776 &port->block1_dma, GFP_KERNEL);
2780 /* Allocate dma memory for command list */
2781 port->command_list =
2782 dma_alloc_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ,
2783 &port->command_list_dma, GFP_KERNEL);
2784 if (!port->command_list) {
2785 dma_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
2786 port->block1, port->block1_dma);
2787 port->block1 = NULL;
2788 port->block1_dma = 0;
2792 /* Setup all pointers into first DMA region */
2793 port->rxfis = port->block1 + AHCI_RX_FIS_OFFSET;
2794 port->rxfis_dma = port->block1_dma + AHCI_RX_FIS_OFFSET;
2795 port->identify = port->block1 + AHCI_IDFY_OFFSET;
2796 port->identify_dma = port->block1_dma + AHCI_IDFY_OFFSET;
2797 port->log_buf = port->block1 + AHCI_SECTBUF_OFFSET;
2798 port->log_buf_dma = port->block1_dma + AHCI_SECTBUF_OFFSET;
2799 port->smart_buf = port->block1 + AHCI_SMARTBUF_OFFSET;
2800 port->smart_buf_dma = port->block1_dma + AHCI_SMARTBUF_OFFSET;
2805 static int mtip_hw_get_identify(struct driver_data *dd)
2807 struct smart_attr attr242;
2811 if (mtip_get_identify(dd->port, NULL) < 0)
2814 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
2815 MTIP_FTL_REBUILD_MAGIC) {
2816 set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags);
2817 return MTIP_FTL_REBUILD_MAGIC;
2819 mtip_dump_identify(dd->port);
2821 /* check write protect, over temp and rebuild statuses */
2822 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
2824 dd->port->log_buf_dma, 1);
2826 dev_warn(&dd->pdev->dev,
2827 "Error in READ LOG EXT (10h) command\n");
2828 /* non-critical error, don't fail the load */
2830 buf = (unsigned char *)dd->port->log_buf;
2831 if (buf[259] & 0x1) {
2832 dev_info(&dd->pdev->dev,
2833 "Write protect bit is set.\n");
2834 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
2836 if (buf[288] == 0xF7) {
2837 dev_info(&dd->pdev->dev,
2838 "Exceeded Tmax, drive in thermal shutdown.\n");
2839 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
2841 if (buf[288] == 0xBF) {
2842 dev_info(&dd->pdev->dev,
2843 "Drive indicates rebuild has failed.\n");
2844 set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag);
2848 /* get write protect progess */
2849 memset(&attr242, 0, sizeof(struct smart_attr));
2850 if (mtip_get_smart_attr(dd->port, 242, &attr242))
2851 dev_warn(&dd->pdev->dev,
2852 "Unable to check write protect progress\n");
2854 dev_info(&dd->pdev->dev,
2855 "Write protect progress: %u%% (%u blocks)\n",
2856 attr242.cur, le32_to_cpu(attr242.data));
2862 * Called once for each card.
2864 * @dd Pointer to the driver data structure.
2867 * 0 on success, else an error code.
2869 static int mtip_hw_init(struct driver_data *dd)
2873 unsigned long timeout, timetaken;
2875 dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR];
2877 mtip_detect_product(dd);
2878 if (dd->product_type == MTIP_PRODUCT_UNKNOWN) {
2885 dd->port = kzalloc_node(sizeof(struct mtip_port), GFP_KERNEL,
2888 dev_err(&dd->pdev->dev,
2889 "Memory allocation: port structure\n");
2893 /* Continue workqueue setup */
2894 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
2895 dd->work[i].port = dd->port;
2897 /* Enable unaligned IO constraints for some devices */
2898 if (mtip_device_unaligned_constrained(dd))
2899 dd->unal_qdepth = MTIP_MAX_UNALIGNED_SLOTS;
2901 dd->unal_qdepth = 0;
2903 atomic_set(&dd->port->cmd_slot_unal, dd->unal_qdepth);
2905 /* Spinlock to prevent concurrent issue */
2906 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
2907 spin_lock_init(&dd->port->cmd_issue_lock[i]);
2909 /* Set the port mmio base address. */
2910 dd->port->mmio = dd->mmio + PORT_OFFSET;
2913 /* DMA allocations */
2914 rv = mtip_dma_alloc(dd);
2918 /* Setup the pointers to the extended s_active and CI registers. */
2919 for (i = 0; i < dd->slot_groups; i++) {
2920 dd->port->s_active[i] =
2921 dd->port->mmio + i*0x80 + PORT_SCR_ACT;
2922 dd->port->cmd_issue[i] =
2923 dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE;
2924 dd->port->completed[i] =
2925 dd->port->mmio + i*0x80 + PORT_SDBV;
2928 timetaken = jiffies;
2929 timeout = jiffies + msecs_to_jiffies(30000);
2930 while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) &&
2931 time_before(jiffies, timeout)) {
2934 if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
2935 timetaken = jiffies - timetaken;
2936 dev_warn(&dd->pdev->dev,
2937 "Surprise removal detected at %u ms\n",
2938 jiffies_to_msecs(timetaken));
2942 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) {
2943 timetaken = jiffies - timetaken;
2944 dev_warn(&dd->pdev->dev,
2945 "Removal detected at %u ms\n",
2946 jiffies_to_msecs(timetaken));
2951 /* Conditionally reset the HBA. */
2952 if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) {
2953 if (mtip_hba_reset(dd) < 0) {
2954 dev_err(&dd->pdev->dev,
2955 "Card did not reset within timeout\n");
2960 /* Clear any pending interrupts on the HBA */
2961 writel(readl(dd->mmio + HOST_IRQ_STAT),
2962 dd->mmio + HOST_IRQ_STAT);
2965 mtip_init_port(dd->port);
2966 mtip_start_port(dd->port);
2968 /* Setup the ISR and enable interrupts. */
2969 rv = request_irq(dd->pdev->irq, mtip_irq_handler, IRQF_SHARED,
2970 dev_driver_string(&dd->pdev->dev), dd);
2972 dev_err(&dd->pdev->dev,
2973 "Unable to allocate IRQ %d\n", dd->pdev->irq);
2976 irq_set_affinity_hint(dd->pdev->irq, get_cpu_mask(dd->isr_binding));
2978 /* Enable interrupts on the HBA. */
2979 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
2980 dd->mmio + HOST_CTL);
2982 init_waitqueue_head(&dd->port->svc_wait);
2984 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
2992 /* Disable interrupts on the HBA. */
2993 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
2994 dd->mmio + HOST_CTL);
2996 /* Release the IRQ. */
2997 irq_set_affinity_hint(dd->pdev->irq, NULL);
2998 free_irq(dd->pdev->irq, dd);
3001 mtip_deinit_port(dd->port);
3005 /* Free the memory allocated for the for structure. */
3011 static int mtip_standby_drive(struct driver_data *dd)
3015 if (dd->sr || !dd->port)
3018 * Send standby immediate (E0h) to the drive so that it
3021 if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags) &&
3022 !test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag) &&
3023 !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) {
3024 rv = mtip_standby_immediate(dd->port);
3026 dev_warn(&dd->pdev->dev,
3027 "STANDBY IMMEDIATE failed\n");
3033 * Called to deinitialize an interface.
3035 * @dd Pointer to the driver data structure.
3040 static int mtip_hw_exit(struct driver_data *dd)
3043 /* de-initialize the port. */
3044 mtip_deinit_port(dd->port);
3046 /* Disable interrupts on the HBA. */
3047 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
3048 dd->mmio + HOST_CTL);
3051 /* Release the IRQ. */
3052 irq_set_affinity_hint(dd->pdev->irq, NULL);
3053 free_irq(dd->pdev->irq, dd);
3056 /* Free dma regions */
3059 /* Free the memory allocated for the for structure. */
3067 * Issue a Standby Immediate command to the device.
3069 * This function is called by the Block Layer just before the
3070 * system powers off during a shutdown.
3072 * @dd Pointer to the driver data structure.
3077 static int mtip_hw_shutdown(struct driver_data *dd)
3080 * Send standby immediate (E0h) to the drive so that it
3083 mtip_standby_drive(dd);
3091 * This function is called by the Block Layer just before the
3092 * system hibernates.
3094 * @dd Pointer to the driver data structure.
3097 * 0 Suspend was successful
3098 * -EFAULT Suspend was not successful
3100 static int mtip_hw_suspend(struct driver_data *dd)
3103 * Send standby immediate (E0h) to the drive
3104 * so that it saves its state.
3106 if (mtip_standby_drive(dd) != 0) {
3107 dev_err(&dd->pdev->dev,
3108 "Failed standby-immediate command\n");
3112 /* Disable interrupts on the HBA.*/
3113 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
3114 dd->mmio + HOST_CTL);
3115 mtip_deinit_port(dd->port);
3123 * This function is called by the Block Layer as the
3126 * @dd Pointer to the driver data structure.
3129 * 0 Resume was successful
3130 * -EFAULT Resume was not successful
3132 static int mtip_hw_resume(struct driver_data *dd)
3134 /* Perform any needed hardware setup steps */
3138 if (mtip_hba_reset(dd) != 0) {
3139 dev_err(&dd->pdev->dev,
3140 "Unable to reset the HBA\n");
3145 * Enable the port, DMA engine, and FIS reception specific
3146 * h/w in controller.
3148 mtip_init_port(dd->port);
3149 mtip_start_port(dd->port);
3151 /* Enable interrupts on the HBA.*/
3152 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
3153 dd->mmio + HOST_CTL);
3159 * Helper function for reusing disk name
3160 * upon hot insertion.
3162 static int rssd_disk_name_format(char *prefix,
3167 const int base = 'z' - 'a' + 1;
3168 char *begin = buf + strlen(prefix);
3169 char *end = buf + buflen;
3179 *--p = 'a' + (index % unit);
3180 index = (index / unit) - 1;
3181 } while (index >= 0);
3183 memmove(begin, p, end - p);
3184 memcpy(buf, prefix, strlen(prefix));
3190 * Block layer IOCTL handler.
3192 * @dev Pointer to the block_device structure.
3194 * @cmd IOCTL command passed from the user application.
3195 * @arg Argument passed from the user application.
3198 * 0 IOCTL completed successfully.
3199 * -ENOTTY IOCTL not supported or invalid driver data
3200 * structure pointer.
3202 static int mtip_block_ioctl(struct block_device *dev,
3207 struct driver_data *dd = dev->bd_disk->private_data;
3209 if (!capable(CAP_SYS_ADMIN))
3215 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
3222 return mtip_hw_ioctl(dd, cmd, arg);
3226 #ifdef CONFIG_COMPAT
3228 * Block layer compat IOCTL handler.
3230 * @dev Pointer to the block_device structure.
3232 * @cmd IOCTL command passed from the user application.
3233 * @arg Argument passed from the user application.
3236 * 0 IOCTL completed successfully.
3237 * -ENOTTY IOCTL not supported or invalid driver data
3238 * structure pointer.
3240 static int mtip_block_compat_ioctl(struct block_device *dev,
3245 struct driver_data *dd = dev->bd_disk->private_data;
3247 if (!capable(CAP_SYS_ADMIN))
3253 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
3259 case HDIO_DRIVE_TASKFILE: {
3260 struct mtip_compat_ide_task_request_s __user *compat_req_task;
3261 ide_task_request_t req_task;
3262 int compat_tasksize, outtotal, ret;
3265 sizeof(struct mtip_compat_ide_task_request_s);
3268 (struct mtip_compat_ide_task_request_s __user *) arg;
3270 if (copy_from_user(&req_task, (void __user *) arg,
3271 compat_tasksize - (2 * sizeof(compat_long_t))))
3274 if (get_user(req_task.out_size, &compat_req_task->out_size))
3277 if (get_user(req_task.in_size, &compat_req_task->in_size))
3280 outtotal = sizeof(struct mtip_compat_ide_task_request_s);
3282 ret = exec_drive_taskfile(dd, (void __user *) arg,
3283 &req_task, outtotal);
3285 if (copy_to_user((void __user *) arg, &req_task,
3287 (2 * sizeof(compat_long_t))))
3290 if (put_user(req_task.out_size, &compat_req_task->out_size))
3293 if (put_user(req_task.in_size, &compat_req_task->in_size))
3299 return mtip_hw_ioctl(dd, cmd, arg);
3305 * Obtain the geometry of the device.
3307 * You may think that this function is obsolete, but some applications,
3308 * fdisk for example still used CHS values. This function describes the
3309 * device as having 224 heads and 56 sectors per cylinder. These values are
3310 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
3311 * partition is described in terms of a start and end cylinder this means
3312 * that each partition is also 4KB aligned. Non-aligned partitions adversely
3313 * affects performance.
3315 * @dev Pointer to the block_device strucutre.
3316 * @geo Pointer to a hd_geometry structure.
3319 * 0 Operation completed successfully.
3320 * -ENOTTY An error occurred while reading the drive capacity.
3322 static int mtip_block_getgeo(struct block_device *dev,
3323 struct hd_geometry *geo)
3325 struct driver_data *dd = dev->bd_disk->private_data;
3331 if (!(mtip_hw_get_capacity(dd, &capacity))) {
3332 dev_warn(&dd->pdev->dev,
3333 "Could not get drive capacity.\n");
3339 sector_div(capacity, (geo->heads * geo->sectors));
3340 geo->cylinders = capacity;
3344 static int mtip_block_open(struct block_device *dev, fmode_t mode)
3346 struct driver_data *dd;
3348 if (dev && dev->bd_disk) {
3349 dd = (struct driver_data *) dev->bd_disk->private_data;
3352 if (test_bit(MTIP_DDF_REMOVAL_BIT,
3362 static void mtip_block_release(struct gendisk *disk, fmode_t mode)
3367 * Block device operation function.
3369 * This structure contains pointers to the functions required by the block
3372 static const struct block_device_operations mtip_block_ops = {
3373 .open = mtip_block_open,
3374 .release = mtip_block_release,
3375 .ioctl = mtip_block_ioctl,
3376 #ifdef CONFIG_COMPAT
3377 .compat_ioctl = mtip_block_compat_ioctl,
3379 .getgeo = mtip_block_getgeo,
3380 .owner = THIS_MODULE
3383 static inline bool is_se_active(struct driver_data *dd)
3385 if (unlikely(test_bit(MTIP_PF_SE_ACTIVE_BIT, &dd->port->flags))) {
3386 if (dd->port->ic_pause_timer) {
3387 unsigned long to = dd->port->ic_pause_timer +
3388 msecs_to_jiffies(1000);
3389 if (time_after(jiffies, to)) {
3390 clear_bit(MTIP_PF_SE_ACTIVE_BIT,
3392 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag);
3393 dd->port->ic_pause_timer = 0;
3394 wake_up_interruptible(&dd->port->svc_wait);
3403 static inline bool is_stopped(struct driver_data *dd, struct request *rq)
3405 if (likely(!(dd->dd_flag & MTIP_DDF_STOP_IO)))
3408 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))
3410 if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))
3412 if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag) &&
3415 if (test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag))
3417 if (test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag))
3423 static bool mtip_check_unal_depth(struct blk_mq_hw_ctx *hctx,
3426 struct driver_data *dd = hctx->queue->queuedata;
3427 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3429 if (rq_data_dir(rq) == READ || !dd->unal_qdepth)
3433 * If unaligned depth must be limited on this controller, mark it
3434 * as unaligned if the IO isn't on a 4k boundary (start of length).
3436 if (blk_rq_sectors(rq) <= 64) {
3437 if ((blk_rq_pos(rq) & 7) || (blk_rq_sectors(rq) & 7))
3441 if (cmd->unaligned && atomic_dec_if_positive(&dd->port->cmd_slot_unal) >= 0)
3447 static blk_status_t mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx,
3450 struct driver_data *dd = hctx->queue->queuedata;
3451 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3452 struct mtip_int_cmd *icmd = cmd->icmd;
3453 struct mtip_cmd_hdr *hdr =
3454 dd->port->command_list + sizeof(struct mtip_cmd_hdr) * rq->tag;
3455 struct mtip_cmd_sg *command_sg;
3457 if (mtip_commands_active(dd->port))
3458 return BLK_STS_DEV_RESOURCE;
3460 hdr->ctba = cpu_to_le32(cmd->command_dma & 0xFFFFFFFF);
3461 if (test_bit(MTIP_PF_HOST_CAP_64, &dd->port->flags))
3462 hdr->ctbau = cpu_to_le32((cmd->command_dma >> 16) >> 16);
3463 /* Populate the SG list */
3464 hdr->opts = cpu_to_le32(icmd->opts | icmd->fis_len);
3465 if (icmd->buf_len) {
3466 command_sg = cmd->command + AHCI_CMD_TBL_HDR_SZ;
3468 command_sg->info = cpu_to_le32((icmd->buf_len-1) & 0x3FFFFF);
3469 command_sg->dba = cpu_to_le32(icmd->buffer & 0xFFFFFFFF);
3470 command_sg->dba_upper =
3471 cpu_to_le32((icmd->buffer >> 16) >> 16);
3473 hdr->opts |= cpu_to_le32((1 << 16));
3476 /* Populate the command header */
3477 hdr->byte_count = 0;
3479 blk_mq_start_request(rq);
3480 mtip_issue_non_ncq_command(dd->port, rq->tag);
3484 static blk_status_t mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
3485 const struct blk_mq_queue_data *bd)
3487 struct driver_data *dd = hctx->queue->queuedata;
3488 struct request *rq = bd->rq;
3489 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3491 if (blk_rq_is_passthrough(rq))
3492 return mtip_issue_reserved_cmd(hctx, rq);
3494 if (unlikely(mtip_check_unal_depth(hctx, rq)))
3495 return BLK_STS_DEV_RESOURCE;
3497 if (is_se_active(dd) || is_stopped(dd, rq))
3498 return BLK_STS_IOERR;
3500 blk_mq_start_request(rq);
3502 mtip_hw_submit_io(dd, rq, cmd, hctx);
3506 static void mtip_free_cmd(struct blk_mq_tag_set *set, struct request *rq,
3507 unsigned int hctx_idx)
3509 struct driver_data *dd = set->driver_data;
3510 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3515 dma_free_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ, cmd->command,
3519 static int mtip_init_cmd(struct blk_mq_tag_set *set, struct request *rq,
3520 unsigned int hctx_idx, unsigned int numa_node)
3522 struct driver_data *dd = set->driver_data;
3523 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3525 cmd->command = dma_alloc_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ,
3526 &cmd->command_dma, GFP_KERNEL);
3530 sg_init_table(cmd->sg, MTIP_MAX_SG);
3534 static enum blk_eh_timer_return mtip_cmd_timeout(struct request *req,
3537 struct driver_data *dd = req->q->queuedata;
3540 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req);
3542 cmd->status = BLK_STS_TIMEOUT;
3543 blk_mq_complete_request(req);
3547 if (test_bit(req->tag, dd->port->cmds_to_issue))
3550 if (test_and_set_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags))
3553 wake_up_interruptible(&dd->port->svc_wait);
3555 return BLK_EH_RESET_TIMER;
3558 static const struct blk_mq_ops mtip_mq_ops = {
3559 .queue_rq = mtip_queue_rq,
3560 .init_request = mtip_init_cmd,
3561 .exit_request = mtip_free_cmd,
3562 .complete = mtip_softirq_done_fn,
3563 .timeout = mtip_cmd_timeout,
3567 * Block layer initialization function.
3569 * This function is called once by the PCI layer for each P320
3570 * device that is connected to the system.
3572 * @dd Pointer to the driver data structure.
3575 * 0 on success else an error code.
3577 static int mtip_block_initialize(struct driver_data *dd)
3579 int rv = 0, wait_for_rebuild = 0;
3581 unsigned int index = 0;
3582 struct kobject *kobj;
3585 goto skip_create_disk; /* hw init done, before rebuild */
3587 if (mtip_hw_init(dd)) {
3589 goto protocol_init_error;
3592 dd->disk = alloc_disk_node(MTIP_MAX_MINORS, dd->numa_node);
3593 if (dd->disk == NULL) {
3594 dev_err(&dd->pdev->dev,
3595 "Unable to allocate gendisk structure\n");
3597 goto alloc_disk_error;
3600 rv = ida_alloc(&rssd_index_ida, GFP_KERNEL);
3605 rv = rssd_disk_name_format("rssd",
3607 dd->disk->disk_name,
3610 goto disk_index_error;
3612 dd->disk->major = dd->major;
3613 dd->disk->first_minor = index * MTIP_MAX_MINORS;
3614 dd->disk->minors = MTIP_MAX_MINORS;
3615 dd->disk->fops = &mtip_block_ops;
3616 dd->disk->private_data = dd;
3619 mtip_hw_debugfs_init(dd);
3621 memset(&dd->tags, 0, sizeof(dd->tags));
3622 dd->tags.ops = &mtip_mq_ops;
3623 dd->tags.nr_hw_queues = 1;
3624 dd->tags.queue_depth = MTIP_MAX_COMMAND_SLOTS;
3625 dd->tags.reserved_tags = 1;
3626 dd->tags.cmd_size = sizeof(struct mtip_cmd);
3627 dd->tags.numa_node = dd->numa_node;
3628 dd->tags.flags = BLK_MQ_F_SHOULD_MERGE;
3629 dd->tags.driver_data = dd;
3630 dd->tags.timeout = MTIP_NCQ_CMD_TIMEOUT_MS;
3632 rv = blk_mq_alloc_tag_set(&dd->tags);
3634 dev_err(&dd->pdev->dev,
3635 "Unable to allocate request queue\n");
3636 goto block_queue_alloc_tag_error;
3639 /* Allocate the request queue. */
3640 dd->queue = blk_mq_init_queue(&dd->tags);
3641 if (IS_ERR(dd->queue)) {
3642 dev_err(&dd->pdev->dev,
3643 "Unable to allocate request queue\n");
3645 goto block_queue_alloc_init_error;
3648 dd->disk->queue = dd->queue;
3649 dd->queue->queuedata = dd;
3652 /* Initialize the protocol layer. */
3653 wait_for_rebuild = mtip_hw_get_identify(dd);
3654 if (wait_for_rebuild < 0) {
3655 dev_err(&dd->pdev->dev,
3656 "Protocol layer initialization failed\n");
3658 goto init_hw_cmds_error;
3662 * if rebuild pending, start the service thread, and delay the block
3663 * queue creation and device_add_disk()
3665 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
3666 goto start_service_thread;
3668 /* Set device limits. */
3669 blk_queue_flag_set(QUEUE_FLAG_NONROT, dd->queue);
3670 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, dd->queue);
3671 blk_queue_max_segments(dd->queue, MTIP_MAX_SG);
3672 blk_queue_physical_block_size(dd->queue, 4096);
3673 blk_queue_max_hw_sectors(dd->queue, 0xffff);
3674 blk_queue_max_segment_size(dd->queue, 0x400000);
3675 dma_set_max_seg_size(&dd->pdev->dev, 0x400000);
3676 blk_queue_io_min(dd->queue, 4096);
3678 /* Set the capacity of the device in 512 byte sectors. */
3679 if (!(mtip_hw_get_capacity(dd, &capacity))) {
3680 dev_warn(&dd->pdev->dev,
3681 "Could not read drive capacity\n");
3683 goto read_capacity_error;
3685 set_capacity(dd->disk, capacity);
3687 /* Enable the block device and add it to /dev */
3688 device_add_disk(&dd->pdev->dev, dd->disk, NULL);
3690 dd->bdev = bdget_disk(dd->disk, 0);
3692 * Now that the disk is active, initialize any sysfs attributes
3693 * managed by the protocol layer.
3695 kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
3697 mtip_hw_sysfs_init(dd, kobj);
3701 if (dd->mtip_svc_handler) {
3702 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
3703 return rv; /* service thread created for handling rebuild */
3706 start_service_thread:
3707 dd->mtip_svc_handler = kthread_create_on_node(mtip_service_thread,
3709 "mtip_svc_thd_%02d", index);
3711 if (IS_ERR(dd->mtip_svc_handler)) {
3712 dev_err(&dd->pdev->dev, "service thread failed to start\n");
3713 dd->mtip_svc_handler = NULL;
3715 goto kthread_run_error;
3717 wake_up_process(dd->mtip_svc_handler);
3718 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
3719 rv = wait_for_rebuild;
3727 /* Delete our gendisk. This also removes the device from /dev */
3728 del_gendisk(dd->disk);
3730 read_capacity_error:
3732 blk_cleanup_queue(dd->queue);
3733 block_queue_alloc_init_error:
3734 blk_mq_free_tag_set(&dd->tags);
3735 block_queue_alloc_tag_error:
3736 mtip_hw_debugfs_exit(dd);
3738 ida_free(&rssd_index_ida, index);
3744 mtip_hw_exit(dd); /* De-initialize the protocol layer. */
3746 protocol_init_error:
3750 static bool mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv)
3752 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3754 cmd->status = BLK_STS_IOERR;
3755 blk_mq_complete_request(rq);
3760 * Block layer deinitialization function.
3762 * Called by the PCI layer as each P320 device is removed.
3764 * @dd Pointer to the driver data structure.
3769 static int mtip_block_remove(struct driver_data *dd)
3771 struct kobject *kobj;
3773 mtip_hw_debugfs_exit(dd);
3775 if (dd->mtip_svc_handler) {
3776 set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
3777 wake_up_interruptible(&dd->port->svc_wait);
3778 kthread_stop(dd->mtip_svc_handler);
3781 /* Clean up the sysfs attributes, if created */
3782 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
3783 kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
3785 mtip_hw_sysfs_exit(dd, kobj);
3792 * Explicitly wait here for IOs to quiesce,
3793 * as mtip_standby_drive usually won't wait for IOs.
3795 if (!mtip_quiesce_io(dd->port, MTIP_QUIESCE_IO_TIMEOUT_MS))
3796 mtip_standby_drive(dd);
3799 dev_info(&dd->pdev->dev, "device %s surprise removal\n",
3800 dd->disk->disk_name);
3802 blk_freeze_queue_start(dd->queue);
3803 blk_mq_quiesce_queue(dd->queue);
3804 blk_mq_tagset_busy_iter(&dd->tags, mtip_no_dev_cleanup, dd);
3805 blk_mq_unquiesce_queue(dd->queue);
3808 * Delete our gendisk structure. This also removes the device
3816 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag))
3817 del_gendisk(dd->disk);
3818 if (dd->disk->queue) {
3819 blk_cleanup_queue(dd->queue);
3820 blk_mq_free_tag_set(&dd->tags);
3827 ida_free(&rssd_index_ida, dd->index);
3829 /* De-initialize the protocol layer. */
3836 * Function called by the PCI layer when just before the
3837 * machine shuts down.
3839 * If a protocol layer shutdown function is present it will be called
3842 * @dd Pointer to the driver data structure.
3847 static int mtip_block_shutdown(struct driver_data *dd)
3849 mtip_hw_shutdown(dd);
3851 /* Delete our gendisk structure, and cleanup the blk queue. */
3853 dev_info(&dd->pdev->dev,
3854 "Shutting down %s ...\n", dd->disk->disk_name);
3856 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag))
3857 del_gendisk(dd->disk);
3858 if (dd->disk->queue) {
3859 blk_cleanup_queue(dd->queue);
3860 blk_mq_free_tag_set(&dd->tags);
3867 ida_free(&rssd_index_ida, dd->index);
3871 static int mtip_block_suspend(struct driver_data *dd)
3873 dev_info(&dd->pdev->dev,
3874 "Suspending %s ...\n", dd->disk->disk_name);
3875 mtip_hw_suspend(dd);
3879 static int mtip_block_resume(struct driver_data *dd)
3881 dev_info(&dd->pdev->dev, "Resuming %s ...\n",
3882 dd->disk->disk_name);
3887 static void drop_cpu(int cpu)
3892 static int get_least_used_cpu_on_node(int node)
3894 int cpu, least_used_cpu, least_cnt;
3895 const struct cpumask *node_mask;
3897 node_mask = cpumask_of_node(node);
3898 least_used_cpu = cpumask_first(node_mask);
3899 least_cnt = cpu_use[least_used_cpu];
3900 cpu = least_used_cpu;
3902 for_each_cpu(cpu, node_mask) {
3903 if (cpu_use[cpu] < least_cnt) {
3904 least_used_cpu = cpu;
3905 least_cnt = cpu_use[cpu];
3908 cpu_use[least_used_cpu]++;
3909 return least_used_cpu;
3912 /* Helper for selecting a node in round robin mode */
3913 static inline int mtip_get_next_rr_node(void)
3915 static int next_node = NUMA_NO_NODE;
3917 if (next_node == NUMA_NO_NODE) {
3918 next_node = first_online_node;
3922 next_node = next_online_node(next_node);
3923 if (next_node == MAX_NUMNODES)
3924 next_node = first_online_node;
3928 static DEFINE_HANDLER(0);
3929 static DEFINE_HANDLER(1);
3930 static DEFINE_HANDLER(2);
3931 static DEFINE_HANDLER(3);
3932 static DEFINE_HANDLER(4);
3933 static DEFINE_HANDLER(5);
3934 static DEFINE_HANDLER(6);
3935 static DEFINE_HANDLER(7);
3937 static void mtip_disable_link_opts(struct driver_data *dd, struct pci_dev *pdev)
3940 unsigned short pcie_dev_ctrl;
3942 pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
3944 pci_read_config_word(pdev,
3945 pos + PCI_EXP_DEVCTL,
3947 if (pcie_dev_ctrl & (1 << 11) ||
3948 pcie_dev_ctrl & (1 << 4)) {
3949 dev_info(&dd->pdev->dev,
3950 "Disabling ERO/No-Snoop on bridge device %04x:%04x\n",
3951 pdev->vendor, pdev->device);
3952 pcie_dev_ctrl &= ~(PCI_EXP_DEVCTL_NOSNOOP_EN |
3953 PCI_EXP_DEVCTL_RELAX_EN);
3954 pci_write_config_word(pdev,
3955 pos + PCI_EXP_DEVCTL,
3961 static void mtip_fix_ero_nosnoop(struct driver_data *dd, struct pci_dev *pdev)
3964 * This workaround is specific to AMD/ATI chipset with a PCI upstream
3965 * device with device id 0x5aXX
3967 if (pdev->bus && pdev->bus->self) {
3968 if (pdev->bus->self->vendor == PCI_VENDOR_ID_ATI &&
3969 ((pdev->bus->self->device & 0xff00) == 0x5a00)) {
3970 mtip_disable_link_opts(dd, pdev->bus->self);
3972 /* Check further up the topology */
3973 struct pci_dev *parent_dev = pdev->bus->self;
3974 if (parent_dev->bus &&
3975 parent_dev->bus->parent &&
3976 parent_dev->bus->parent->self &&
3977 parent_dev->bus->parent->self->vendor ==
3978 PCI_VENDOR_ID_ATI &&
3979 (parent_dev->bus->parent->self->device &
3980 0xff00) == 0x5a00) {
3981 mtip_disable_link_opts(dd,
3982 parent_dev->bus->parent->self);
3989 * Called for each supported PCI device detected.
3991 * This function allocates the private data structure, enables the
3992 * PCI device and then calls the block layer initialization function.
3995 * 0 on success else an error code.
3997 static int mtip_pci_probe(struct pci_dev *pdev,
3998 const struct pci_device_id *ent)
4001 struct driver_data *dd = NULL;
4003 const struct cpumask *node_mask;
4004 int cpu, i = 0, j = 0;
4005 int my_node = NUMA_NO_NODE;
4006 unsigned long flags;
4008 /* Allocate memory for this devices private data. */
4009 my_node = pcibus_to_node(pdev->bus);
4010 if (my_node != NUMA_NO_NODE) {
4011 if (!node_online(my_node))
4012 my_node = mtip_get_next_rr_node();
4014 dev_info(&pdev->dev, "Kernel not reporting proximity, choosing a node\n");
4015 my_node = mtip_get_next_rr_node();
4017 dev_info(&pdev->dev, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n",
4018 my_node, pcibus_to_node(pdev->bus), dev_to_node(&pdev->dev),
4019 cpu_to_node(raw_smp_processor_id()), raw_smp_processor_id());
4021 dd = kzalloc_node(sizeof(struct driver_data), GFP_KERNEL, my_node);
4024 "Unable to allocate memory for driver data\n");
4028 /* Attach the private data to this PCI device. */
4029 pci_set_drvdata(pdev, dd);
4031 rv = pcim_enable_device(pdev);
4033 dev_err(&pdev->dev, "Unable to enable device\n");
4037 /* Map BAR5 to memory. */
4038 rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME);
4040 dev_err(&pdev->dev, "Unable to map regions\n");
4044 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
4046 dev_warn(&pdev->dev, "64-bit DMA enable failed\n");
4050 /* Copy the info we may need later into the private data structure. */
4051 dd->major = mtip_major;
4052 dd->instance = instance;
4054 dd->numa_node = my_node;
4056 INIT_LIST_HEAD(&dd->online_list);
4057 INIT_LIST_HEAD(&dd->remove_list);
4059 memset(dd->workq_name, 0, 32);
4060 snprintf(dd->workq_name, 31, "mtipq%d", dd->instance);
4062 dd->isr_workq = create_workqueue(dd->workq_name);
4063 if (!dd->isr_workq) {
4064 dev_warn(&pdev->dev, "Can't create wq %d\n", dd->instance);
4069 memset(cpu_list, 0, sizeof(cpu_list));
4071 node_mask = cpumask_of_node(dd->numa_node);
4072 if (!cpumask_empty(node_mask)) {
4073 for_each_cpu(cpu, node_mask)
4075 snprintf(&cpu_list[j], 256 - j, "%d ", cpu);
4076 j = strlen(cpu_list);
4079 dev_info(&pdev->dev, "Node %d on package %d has %d cpu(s): %s\n",
4081 topology_physical_package_id(cpumask_first(node_mask)),
4082 nr_cpus_node(dd->numa_node),
4085 dev_dbg(&pdev->dev, "mtip32xx: node_mask empty\n");
4087 dd->isr_binding = get_least_used_cpu_on_node(dd->numa_node);
4088 dev_info(&pdev->dev, "Initial IRQ binding node:cpu %d:%d\n",
4089 cpu_to_node(dd->isr_binding), dd->isr_binding);
4091 /* first worker context always runs in ISR */
4092 dd->work[0].cpu_binding = dd->isr_binding;
4093 dd->work[1].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
4094 dd->work[2].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
4095 dd->work[3].cpu_binding = dd->work[0].cpu_binding;
4096 dd->work[4].cpu_binding = dd->work[1].cpu_binding;
4097 dd->work[5].cpu_binding = dd->work[2].cpu_binding;
4098 dd->work[6].cpu_binding = dd->work[2].cpu_binding;
4099 dd->work[7].cpu_binding = dd->work[1].cpu_binding;
4101 /* Log the bindings */
4102 for_each_present_cpu(cpu) {
4103 memset(cpu_list, 0, sizeof(cpu_list));
4104 for (i = 0, j = 0; i < MTIP_MAX_SLOT_GROUPS; i++) {
4105 if (dd->work[i].cpu_binding == cpu) {
4106 snprintf(&cpu_list[j], 256 - j, "%d ", i);
4107 j = strlen(cpu_list);
4111 dev_info(&pdev->dev, "CPU %d: WQs %s\n", cpu, cpu_list);
4114 INIT_WORK(&dd->work[0].work, mtip_workq_sdbf0);
4115 INIT_WORK(&dd->work[1].work, mtip_workq_sdbf1);
4116 INIT_WORK(&dd->work[2].work, mtip_workq_sdbf2);
4117 INIT_WORK(&dd->work[3].work, mtip_workq_sdbf3);
4118 INIT_WORK(&dd->work[4].work, mtip_workq_sdbf4);
4119 INIT_WORK(&dd->work[5].work, mtip_workq_sdbf5);
4120 INIT_WORK(&dd->work[6].work, mtip_workq_sdbf6);
4121 INIT_WORK(&dd->work[7].work, mtip_workq_sdbf7);
4123 pci_set_master(pdev);
4124 rv = pci_enable_msi(pdev);
4126 dev_warn(&pdev->dev,
4127 "Unable to enable MSI interrupt.\n");
4128 goto msi_initialize_err;
4131 mtip_fix_ero_nosnoop(dd, pdev);
4133 /* Initialize the block layer. */
4134 rv = mtip_block_initialize(dd);
4137 "Unable to initialize block layer\n");
4138 goto block_initialize_err;
4142 * Increment the instance count so that each device has a unique
4146 if (rv != MTIP_FTL_REBUILD_MAGIC)
4147 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
4149 rv = 0; /* device in rebuild state, return 0 from probe */
4151 /* Add to online list even if in ftl rebuild */
4152 spin_lock_irqsave(&dev_lock, flags);
4153 list_add(&dd->online_list, &online_list);
4154 spin_unlock_irqrestore(&dev_lock, flags);
4158 block_initialize_err:
4159 pci_disable_msi(pdev);
4162 if (dd->isr_workq) {
4163 flush_workqueue(dd->isr_workq);
4164 destroy_workqueue(dd->isr_workq);
4165 drop_cpu(dd->work[0].cpu_binding);
4166 drop_cpu(dd->work[1].cpu_binding);
4167 drop_cpu(dd->work[2].cpu_binding);
4170 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
4174 pci_set_drvdata(pdev, NULL);
4181 * Called for each probed device when the device is removed or the
4182 * driver is unloaded.
4187 static void mtip_pci_remove(struct pci_dev *pdev)
4189 struct driver_data *dd = pci_get_drvdata(pdev);
4190 unsigned long flags, to;
4192 set_bit(MTIP_DDF_REMOVAL_BIT, &dd->dd_flag);
4194 spin_lock_irqsave(&dev_lock, flags);
4195 list_del_init(&dd->online_list);
4196 list_add(&dd->remove_list, &removing_list);
4197 spin_unlock_irqrestore(&dev_lock, flags);
4199 mtip_check_surprise_removal(pdev);
4200 synchronize_irq(dd->pdev->irq);
4202 /* Spin until workers are done */
4203 to = jiffies + msecs_to_jiffies(4000);
4206 } while (atomic_read(&dd->irq_workers_active) != 0 &&
4207 time_before(jiffies, to));
4210 fsync_bdev(dd->bdev);
4212 if (atomic_read(&dd->irq_workers_active) != 0) {
4213 dev_warn(&dd->pdev->dev,
4214 "Completion workers still active!\n");
4217 blk_set_queue_dying(dd->queue);
4218 set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
4220 /* Clean up the block layer. */
4221 mtip_block_remove(dd);
4223 if (dd->isr_workq) {
4224 flush_workqueue(dd->isr_workq);
4225 destroy_workqueue(dd->isr_workq);
4226 drop_cpu(dd->work[0].cpu_binding);
4227 drop_cpu(dd->work[1].cpu_binding);
4228 drop_cpu(dd->work[2].cpu_binding);
4231 pci_disable_msi(pdev);
4233 spin_lock_irqsave(&dev_lock, flags);
4234 list_del_init(&dd->remove_list);
4235 spin_unlock_irqrestore(&dev_lock, flags);
4239 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
4240 pci_set_drvdata(pdev, NULL);
4244 * Called for each probed device when the device is suspended.
4250 static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
4253 struct driver_data *dd = pci_get_drvdata(pdev);
4257 "Driver private datastructure is NULL\n");
4261 set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
4263 /* Disable ports & interrupts then send standby immediate */
4264 rv = mtip_block_suspend(dd);
4267 "Failed to suspend controller\n");
4272 * Save the pci config space to pdev structure &
4273 * disable the device
4275 pci_save_state(pdev);
4276 pci_disable_device(pdev);
4278 /* Move to Low power state*/
4279 pci_set_power_state(pdev, PCI_D3hot);
4285 * Called for each probed device when the device is resumed.
4291 static int mtip_pci_resume(struct pci_dev *pdev)
4294 struct driver_data *dd;
4296 dd = pci_get_drvdata(pdev);
4299 "Driver private datastructure is NULL\n");
4303 /* Move the device to active State */
4304 pci_set_power_state(pdev, PCI_D0);
4306 /* Restore PCI configuration space */
4307 pci_restore_state(pdev);
4309 /* Enable the PCI device*/
4310 rv = pcim_enable_device(pdev);
4313 "Failed to enable card during resume\n");
4316 pci_set_master(pdev);
4319 * Calls hbaReset, initPort, & startPort function
4320 * then enables interrupts
4322 rv = mtip_block_resume(dd);
4324 dev_err(&pdev->dev, "Unable to resume\n");
4327 clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
4338 static void mtip_pci_shutdown(struct pci_dev *pdev)
4340 struct driver_data *dd = pci_get_drvdata(pdev);
4342 mtip_block_shutdown(dd);
4345 /* Table of device ids supported by this driver. */
4346 static const struct pci_device_id mtip_pci_tbl[] = {
4347 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320H_DEVICE_ID) },
4348 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320M_DEVICE_ID) },
4349 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320S_DEVICE_ID) },
4350 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P325M_DEVICE_ID) },
4351 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420H_DEVICE_ID) },
4352 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420M_DEVICE_ID) },
4353 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P425M_DEVICE_ID) },
4357 /* Structure that describes the PCI driver functions. */
4358 static struct pci_driver mtip_pci_driver = {
4359 .name = MTIP_DRV_NAME,
4360 .id_table = mtip_pci_tbl,
4361 .probe = mtip_pci_probe,
4362 .remove = mtip_pci_remove,
4363 .suspend = mtip_pci_suspend,
4364 .resume = mtip_pci_resume,
4365 .shutdown = mtip_pci_shutdown,
4368 MODULE_DEVICE_TABLE(pci, mtip_pci_tbl);
4371 * Module initialization function.
4373 * Called once when the module is loaded. This function allocates a major
4374 * block device number to the Cyclone devices and registers the PCI layer
4378 * 0 on success else error code.
4380 static int __init mtip_init(void)
4384 pr_info(MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n");
4386 spin_lock_init(&dev_lock);
4388 INIT_LIST_HEAD(&online_list);
4389 INIT_LIST_HEAD(&removing_list);
4391 /* Allocate a major block device number to use with this driver. */
4392 error = register_blkdev(0, MTIP_DRV_NAME);
4394 pr_err("Unable to register block device (%d)\n",
4400 dfs_parent = debugfs_create_dir("rssd", NULL);
4401 if (IS_ERR_OR_NULL(dfs_parent)) {
4402 pr_warn("Error creating debugfs parent\n");
4406 dfs_device_status = debugfs_create_file("device_status",
4407 0444, dfs_parent, NULL,
4408 &mtip_device_status_fops);
4409 if (IS_ERR_OR_NULL(dfs_device_status)) {
4410 pr_err("Error creating device_status node\n");
4411 dfs_device_status = NULL;
4415 /* Register our PCI operations. */
4416 error = pci_register_driver(&mtip_pci_driver);
4418 debugfs_remove(dfs_parent);
4419 unregister_blkdev(mtip_major, MTIP_DRV_NAME);
4426 * Module de-initialization function.
4428 * Called once when the module is unloaded. This function deallocates
4429 * the major block device number allocated by mtip_init() and
4430 * unregisters the PCI layer of the driver.
4435 static void __exit mtip_exit(void)
4437 /* Release the allocated major block device number. */
4438 unregister_blkdev(mtip_major, MTIP_DRV_NAME);
4440 /* Unregister the PCI driver. */
4441 pci_unregister_driver(&mtip_pci_driver);
4443 debugfs_remove_recursive(dfs_parent);
4446 MODULE_AUTHOR("Micron Technology, Inc");
4447 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
4448 MODULE_LICENSE("GPL");
4449 MODULE_VERSION(MTIP_DRV_VERSION);
4451 module_init(mtip_init);
4452 module_exit(mtip_exit);