2 * Driver for the Micron P320 SSD
3 * Copyright (C) 2011 Micron Technology, Inc.
5 * Portions of this code were derived from works subjected to the
7 * Copyright (C) 2009 Integrated Device Technology, Inc.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
21 #include <linux/pci.h>
22 #include <linux/interrupt.h>
23 #include <linux/ata.h>
24 #include <linux/delay.h>
25 #include <linux/hdreg.h>
26 #include <linux/uaccess.h>
27 #include <linux/random.h>
28 #include <linux/smp.h>
29 #include <linux/compat.h>
31 #include <linux/module.h>
32 #include <linux/genhd.h>
33 #include <linux/blkdev.h>
34 #include <linux/blk-mq.h>
35 #include <linux/bio.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/idr.h>
38 #include <linux/kthread.h>
39 #include <../drivers/ata/ahci.h>
40 #include <linux/export.h>
41 #include <linux/debugfs.h>
42 #include <linux/prefetch.h>
45 #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
47 /* DMA region containing RX Fis, Identify, RLE10, and SMART buffers */
48 #define AHCI_RX_FIS_SZ 0x100
49 #define AHCI_RX_FIS_OFFSET 0x0
50 #define AHCI_IDFY_SZ ATA_SECT_SIZE
51 #define AHCI_IDFY_OFFSET 0x400
52 #define AHCI_SECTBUF_SZ ATA_SECT_SIZE
53 #define AHCI_SECTBUF_OFFSET 0x800
54 #define AHCI_SMARTBUF_SZ ATA_SECT_SIZE
55 #define AHCI_SMARTBUF_OFFSET 0xC00
56 /* 0x100 + 0x200 + 0x200 + 0x200 is smaller than 4k but we pad it out */
57 #define BLOCK_DMA_ALLOC_SZ 4096
59 /* DMA region containing command table (should be 8192 bytes) */
60 #define AHCI_CMD_SLOT_SZ sizeof(struct mtip_cmd_hdr)
61 #define AHCI_CMD_TBL_SZ (MTIP_MAX_COMMAND_SLOTS * AHCI_CMD_SLOT_SZ)
62 #define AHCI_CMD_TBL_OFFSET 0x0
64 /* DMA region per command (contains header and SGL) */
65 #define AHCI_CMD_TBL_HDR_SZ 0x80
66 #define AHCI_CMD_TBL_HDR_OFFSET 0x0
67 #define AHCI_CMD_TBL_SGL_SZ (MTIP_MAX_SG * sizeof(struct mtip_cmd_sg))
68 #define AHCI_CMD_TBL_SGL_OFFSET AHCI_CMD_TBL_HDR_SZ
69 #define CMD_DMA_ALLOC_SZ (AHCI_CMD_TBL_SGL_SZ + AHCI_CMD_TBL_HDR_SZ)
72 #define HOST_CAP_NZDMA (1 << 19)
73 #define HOST_HSORG 0xFC
74 #define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
75 #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
76 #define HSORG_HWREV 0xFF00
77 #define HSORG_STYLE 0x8
78 #define HSORG_SLOTGROUPS 0x7
80 #define PORT_COMMAND_ISSUE 0x38
81 #define PORT_SDBV 0x7C
83 #define PORT_OFFSET 0x100
84 #define PORT_MEM_SIZE 0x80
86 #define PORT_IRQ_ERR \
87 (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
88 PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
89 PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
91 #define PORT_IRQ_LEGACY \
92 (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
93 #define PORT_IRQ_HANDLED \
94 (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
95 PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
96 PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
97 #define DEF_PORT_IRQ \
98 (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
100 /* product numbers */
101 #define MTIP_PRODUCT_UNKNOWN 0x00
102 #define MTIP_PRODUCT_ASICFPGA 0x11
104 /* Device instance number, incremented each time a device is probed. */
107 static struct list_head online_list;
108 static struct list_head removing_list;
109 static spinlock_t dev_lock;
112 * Global variable used to hold the major block device number
113 * allocated in mtip_init().
115 static int mtip_major;
116 static struct dentry *dfs_parent;
117 static struct dentry *dfs_device_status;
119 static u32 cpu_use[NR_CPUS];
121 static DEFINE_SPINLOCK(rssd_index_lock);
122 static DEFINE_IDA(rssd_index_ida);
124 static int mtip_block_initialize(struct driver_data *dd);
127 struct mtip_compat_ide_task_request_s {
130 ide_reg_valid_t out_flags;
131 ide_reg_valid_t in_flags;
134 compat_ulong_t out_size;
135 compat_ulong_t in_size;
140 * This function check_for_surprise_removal is called
141 * while card is removed from the system and it will
142 * read the vendor id from the configration space
144 * @pdev Pointer to the pci_dev structure.
147 * true if device removed, else false
149 static bool mtip_check_surprise_removal(struct pci_dev *pdev)
152 struct driver_data *dd = pci_get_drvdata(pdev);
157 /* Read the vendorID from the configuration space */
158 pci_read_config_word(pdev, 0x00, &vendor_id);
159 if (vendor_id == 0xFFFF) {
162 set_bit(QUEUE_FLAG_DEAD, &dd->queue->queue_flags);
164 dev_warn(&dd->pdev->dev,
165 "%s: dd->queue is NULL\n", __func__);
166 return true; /* device removed */
169 return false; /* device present */
172 /* we have to use runtime tag to setup command header */
173 static void mtip_init_cmd_header(struct request *rq)
175 struct driver_data *dd = rq->q->queuedata;
176 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
178 /* Point the command headers at the command tables. */
179 cmd->command_header = dd->port->command_list +
180 (sizeof(struct mtip_cmd_hdr) * rq->tag);
181 cmd->command_header_dma = dd->port->command_list_dma +
182 (sizeof(struct mtip_cmd_hdr) * rq->tag);
184 if (test_bit(MTIP_PF_HOST_CAP_64, &dd->port->flags))
185 cmd->command_header->ctbau = __force_bit2int cpu_to_le32((cmd->command_dma >> 16) >> 16);
187 cmd->command_header->ctba = __force_bit2int cpu_to_le32(cmd->command_dma & 0xFFFFFFFF);
190 static struct mtip_cmd *mtip_get_int_command(struct driver_data *dd)
194 if (mtip_check_surprise_removal(dd->pdev))
197 rq = blk_mq_alloc_request(dd->queue, REQ_OP_DRV_IN, BLK_MQ_REQ_RESERVED);
201 /* Internal cmd isn't submitted via .queue_rq */
202 mtip_init_cmd_header(rq);
204 return blk_mq_rq_to_pdu(rq);
207 static struct mtip_cmd *mtip_cmd_from_tag(struct driver_data *dd,
210 struct blk_mq_hw_ctx *hctx = dd->queue->queue_hw_ctx[0];
212 return blk_mq_rq_to_pdu(blk_mq_tag_to_rq(hctx->tags, tag));
216 * Reset the HBA (without sleeping)
218 * @dd Pointer to the driver data structure.
221 * 0 The reset was successful.
222 * -1 The HBA Reset bit did not clear.
224 static int mtip_hba_reset(struct driver_data *dd)
226 unsigned long timeout;
228 /* Set the reset bit */
229 writel(HOST_RESET, dd->mmio + HOST_CTL);
232 readl(dd->mmio + HOST_CTL);
235 * Spin for up to 10 seconds waiting for reset acknowledgement. Spec
236 * is 1 sec but in LUN failure conditions, up to 10 secs are required
238 timeout = jiffies + msecs_to_jiffies(10000);
241 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))
244 } while ((readl(dd->mmio + HOST_CTL) & HOST_RESET)
245 && time_before(jiffies, timeout));
247 if (readl(dd->mmio + HOST_CTL) & HOST_RESET)
254 * Issue a command to the hardware.
256 * Set the appropriate bit in the s_active and Command Issue hardware
257 * registers, causing hardware command processing to begin.
259 * @port Pointer to the port structure.
260 * @tag The tag of the command to be issued.
265 static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag)
267 int group = tag >> 5;
269 /* guard SACT and CI registers */
270 spin_lock(&port->cmd_issue_lock[group]);
271 writel((1 << MTIP_TAG_BIT(tag)),
272 port->s_active[MTIP_TAG_INDEX(tag)]);
273 writel((1 << MTIP_TAG_BIT(tag)),
274 port->cmd_issue[MTIP_TAG_INDEX(tag)]);
275 spin_unlock(&port->cmd_issue_lock[group]);
279 * Enable/disable the reception of FIS
281 * @port Pointer to the port data structure
282 * @enable 1 to enable, 0 to disable
285 * Previous state: 1 enabled, 0 disabled
287 static int mtip_enable_fis(struct mtip_port *port, int enable)
291 /* enable FIS reception */
292 tmp = readl(port->mmio + PORT_CMD);
294 writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
296 writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
299 readl(port->mmio + PORT_CMD);
301 return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX));
305 * Enable/disable the DMA engine
307 * @port Pointer to the port data structure
308 * @enable 1 to enable, 0 to disable
311 * Previous state: 1 enabled, 0 disabled.
313 static int mtip_enable_engine(struct mtip_port *port, int enable)
317 /* enable FIS reception */
318 tmp = readl(port->mmio + PORT_CMD);
320 writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD);
322 writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD);
324 readl(port->mmio + PORT_CMD);
325 return (((tmp & PORT_CMD_START) == PORT_CMD_START));
329 * Enables the port DMA engine and FIS reception.
334 static inline void mtip_start_port(struct mtip_port *port)
336 /* Enable FIS reception */
337 mtip_enable_fis(port, 1);
339 /* Enable the DMA engine */
340 mtip_enable_engine(port, 1);
344 * Deinitialize a port by disabling port interrupts, the DMA engine,
347 * @port Pointer to the port structure
352 static inline void mtip_deinit_port(struct mtip_port *port)
354 /* Disable interrupts on this port */
355 writel(0, port->mmio + PORT_IRQ_MASK);
357 /* Disable the DMA engine */
358 mtip_enable_engine(port, 0);
360 /* Disable FIS reception */
361 mtip_enable_fis(port, 0);
367 * This function deinitializes the port by calling mtip_deinit_port() and
368 * then initializes it by setting the command header and RX FIS addresses,
369 * clearing the SError register and any pending port interrupts before
370 * re-enabling the default set of port interrupts.
372 * @port Pointer to the port structure.
377 static void mtip_init_port(struct mtip_port *port)
380 mtip_deinit_port(port);
382 /* Program the command list base and FIS base addresses */
383 if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) {
384 writel((port->command_list_dma >> 16) >> 16,
385 port->mmio + PORT_LST_ADDR_HI);
386 writel((port->rxfis_dma >> 16) >> 16,
387 port->mmio + PORT_FIS_ADDR_HI);
388 set_bit(MTIP_PF_HOST_CAP_64, &port->flags);
391 writel(port->command_list_dma & 0xFFFFFFFF,
392 port->mmio + PORT_LST_ADDR);
393 writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR);
396 writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR);
398 /* reset the completed registers.*/
399 for (i = 0; i < port->dd->slot_groups; i++)
400 writel(0xFFFFFFFF, port->completed[i]);
402 /* Clear any pending interrupts for this port */
403 writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT);
405 /* Clear any pending interrupts on the HBA. */
406 writel(readl(port->dd->mmio + HOST_IRQ_STAT),
407 port->dd->mmio + HOST_IRQ_STAT);
409 /* Enable port interrupts */
410 writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK);
416 * @port Pointer to the port data structure.
421 static void mtip_restart_port(struct mtip_port *port)
423 unsigned long timeout;
425 /* Disable the DMA engine */
426 mtip_enable_engine(port, 0);
428 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
429 timeout = jiffies + msecs_to_jiffies(500);
430 while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON)
431 && time_before(jiffies, timeout))
434 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
438 * Chip quirk: escalate to hba reset if
439 * PxCMD.CR not clear after 500 ms
441 if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) {
442 dev_warn(&port->dd->pdev->dev,
443 "PxCMD.CR not clear, escalating reset\n");
445 if (mtip_hba_reset(port->dd))
446 dev_err(&port->dd->pdev->dev,
447 "HBA reset escalation failed.\n");
449 /* 30 ms delay before com reset to quiesce chip */
453 dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n");
456 writel(readl(port->mmio + PORT_SCR_CTL) |
457 1, port->mmio + PORT_SCR_CTL);
458 readl(port->mmio + PORT_SCR_CTL);
460 /* Wait 1 ms to quiesce chip function */
461 timeout = jiffies + msecs_to_jiffies(1);
462 while (time_before(jiffies, timeout))
465 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
468 /* Clear PxSCTL.DET */
469 writel(readl(port->mmio + PORT_SCR_CTL) & ~1,
470 port->mmio + PORT_SCR_CTL);
471 readl(port->mmio + PORT_SCR_CTL);
473 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
474 timeout = jiffies + msecs_to_jiffies(500);
475 while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
476 && time_before(jiffies, timeout))
479 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
482 if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
483 dev_warn(&port->dd->pdev->dev,
484 "COM reset failed\n");
486 mtip_init_port(port);
487 mtip_start_port(port);
491 static int mtip_device_reset(struct driver_data *dd)
495 if (mtip_check_surprise_removal(dd->pdev))
498 if (mtip_hba_reset(dd) < 0)
502 mtip_init_port(dd->port);
503 mtip_start_port(dd->port);
505 /* Enable interrupts on the HBA. */
506 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
507 dd->mmio + HOST_CTL);
512 * Helper function for tag logging
514 static void print_tags(struct driver_data *dd,
516 unsigned long *tagbits,
519 unsigned char tagmap[128];
520 int group, tagmap_len = 0;
522 memset(tagmap, 0, sizeof(tagmap));
523 for (group = SLOTBITS_IN_LONGS; group > 0; group--)
524 tagmap_len += sprintf(tagmap + tagmap_len, "%016lX ",
526 dev_warn(&dd->pdev->dev,
527 "%d command(s) %s: tagmap [%s]", cnt, msg, tagmap);
530 static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
531 dma_addr_t buffer_dma, unsigned int sectors);
532 static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
533 struct smart_attr *attrib);
535 static void mtip_complete_command(struct mtip_cmd *cmd, blk_status_t status)
537 struct request *req = blk_mq_rq_from_pdu(cmd);
539 cmd->status = status;
540 blk_mq_complete_request(req);
546 * @dd Pointer to the DRIVER_DATA structure.
551 static void mtip_handle_tfe(struct driver_data *dd)
553 int group, tag, bit, reissue, rv;
554 struct mtip_port *port;
555 struct mtip_cmd *cmd;
557 struct host_to_dev_fis *fis;
558 unsigned long tagaccum[SLOTBITS_IN_LONGS];
559 unsigned int cmd_cnt = 0;
561 char *fail_reason = NULL;
562 int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0;
564 dev_warn(&dd->pdev->dev, "Taskfile error\n");
568 if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
569 cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
570 dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n");
571 mtip_complete_command(cmd, BLK_STS_IOERR);
575 /* clear the tag accumulator */
576 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
578 /* Loop through all the groups */
579 for (group = 0; group < dd->slot_groups; group++) {
580 completed = readl(port->completed[group]);
582 dev_warn(&dd->pdev->dev, "g=%u, comp=%x\n", group, completed);
584 /* clear completed status register in the hardware.*/
585 writel(completed, port->completed[group]);
587 /* Process successfully completed commands */
588 for (bit = 0; bit < 32 && completed; bit++) {
589 if (!(completed & (1<<bit)))
591 tag = (group << 5) + bit;
593 /* Skip the internal command slot */
594 if (tag == MTIP_TAG_INTERNAL)
597 cmd = mtip_cmd_from_tag(dd, tag);
598 mtip_complete_command(cmd, 0);
599 set_bit(tag, tagaccum);
604 print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt);
606 /* Restart the port */
608 mtip_restart_port(port);
610 /* Trying to determine the cause of the error */
611 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
613 dd->port->log_buf_dma, 1);
615 dev_warn(&dd->pdev->dev,
616 "Error in READ LOG EXT (10h) command\n");
617 /* non-critical error, don't fail the load */
619 buf = (unsigned char *)dd->port->log_buf;
620 if (buf[259] & 0x1) {
621 dev_info(&dd->pdev->dev,
622 "Write protect bit is set.\n");
623 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
624 fail_all_ncq_write = 1;
625 fail_reason = "write protect";
627 if (buf[288] == 0xF7) {
628 dev_info(&dd->pdev->dev,
629 "Exceeded Tmax, drive in thermal shutdown.\n");
630 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
631 fail_all_ncq_cmds = 1;
632 fail_reason = "thermal shutdown";
634 if (buf[288] == 0xBF) {
635 set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag);
636 dev_info(&dd->pdev->dev,
637 "Drive indicates rebuild has failed. Secure erase required.\n");
638 fail_all_ncq_cmds = 1;
639 fail_reason = "rebuild failed";
643 /* clear the tag accumulator */
644 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
646 /* Loop through all the groups */
647 for (group = 0; group < dd->slot_groups; group++) {
648 for (bit = 0; bit < 32; bit++) {
650 tag = (group << 5) + bit;
651 cmd = mtip_cmd_from_tag(dd, tag);
653 fis = (struct host_to_dev_fis *)cmd->command;
655 /* Should re-issue? */
656 if (tag == MTIP_TAG_INTERNAL ||
657 fis->command == ATA_CMD_SET_FEATURES)
660 if (fail_all_ncq_cmds ||
661 (fail_all_ncq_write &&
662 fis->command == ATA_CMD_FPDMA_WRITE)) {
663 dev_warn(&dd->pdev->dev,
664 " Fail: %s w/tag %d [%s].\n",
665 fis->command == ATA_CMD_FPDMA_WRITE ?
668 fail_reason != NULL ?
669 fail_reason : "unknown");
670 mtip_complete_command(cmd, BLK_STS_MEDIUM);
676 * First check if this command has
677 * exceeded its retries.
679 if (reissue && (cmd->retries-- > 0)) {
681 set_bit(tag, tagaccum);
683 /* Re-issue the command. */
684 mtip_issue_ncq_command(port, tag);
689 /* Retire a command that will not be reissued */
690 dev_warn(&port->dd->pdev->dev,
691 "retiring tag %d\n", tag);
693 mtip_complete_command(cmd, BLK_STS_IOERR);
696 print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt);
700 * Handle a set device bits interrupt
702 static inline void mtip_workq_sdbfx(struct mtip_port *port, int group,
705 struct driver_data *dd = port->dd;
707 struct mtip_cmd *command;
710 WARN_ON_ONCE(!completed);
713 /* clear completed status register in the hardware.*/
714 writel(completed, port->completed[group]);
716 /* Process completed commands. */
717 for (bit = 0; (bit < 32) && completed; bit++) {
718 if (completed & 0x01) {
719 tag = (group << 5) | bit;
721 /* skip internal command slot. */
722 if (unlikely(tag == MTIP_TAG_INTERNAL))
725 command = mtip_cmd_from_tag(dd, tag);
726 mtip_complete_command(command, 0);
731 /* If last, re-enable interrupts */
732 if (atomic_dec_return(&dd->irq_workers_active) == 0)
733 writel(0xffffffff, dd->mmio + HOST_IRQ_STAT);
737 * Process legacy pio and d2h interrupts
739 static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat)
741 struct mtip_port *port = dd->port;
742 struct mtip_cmd *cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
744 if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) && cmd) {
745 int group = MTIP_TAG_INDEX(MTIP_TAG_INTERNAL);
746 int status = readl(port->cmd_issue[group]);
748 if (!(status & (1 << MTIP_TAG_BIT(MTIP_TAG_INTERNAL))))
749 mtip_complete_command(cmd, 0);
754 * Demux and handle errors
756 static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
758 if (unlikely(port_stat & PORT_IRQ_CONNECT)) {
759 dev_warn(&dd->pdev->dev,
760 "Clearing PxSERR.DIAG.x\n");
761 writel((1 << 26), dd->port->mmio + PORT_SCR_ERR);
764 if (unlikely(port_stat & PORT_IRQ_PHYRDY)) {
765 dev_warn(&dd->pdev->dev,
766 "Clearing PxSERR.DIAG.n\n");
767 writel((1 << 16), dd->port->mmio + PORT_SCR_ERR);
770 if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) {
771 dev_warn(&dd->pdev->dev,
772 "Port stat errors %x unhandled\n",
773 (port_stat & ~PORT_IRQ_HANDLED));
774 if (mtip_check_surprise_removal(dd->pdev))
777 if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) {
778 set_bit(MTIP_PF_EH_ACTIVE_BIT, &dd->port->flags);
779 wake_up_interruptible(&dd->port->svc_wait);
783 static inline irqreturn_t mtip_handle_irq(struct driver_data *data)
785 struct driver_data *dd = (struct driver_data *) data;
786 struct mtip_port *port = dd->port;
787 u32 hba_stat, port_stat;
789 int do_irq_enable = 1, i, workers;
790 struct mtip_work *twork;
792 hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
796 /* Acknowledge the interrupt status on the port.*/
797 port_stat = readl(port->mmio + PORT_IRQ_STAT);
798 if (unlikely(port_stat == 0xFFFFFFFF)) {
799 mtip_check_surprise_removal(dd->pdev);
802 writel(port_stat, port->mmio + PORT_IRQ_STAT);
804 /* Demux port status */
805 if (likely(port_stat & PORT_IRQ_SDB_FIS)) {
807 WARN_ON_ONCE(atomic_read(&dd->irq_workers_active) != 0);
809 /* Start at 1: group zero is always local? */
810 for (i = 0, workers = 0; i < MTIP_MAX_SLOT_GROUPS;
812 twork = &dd->work[i];
813 twork->completed = readl(port->completed[i]);
814 if (twork->completed)
818 atomic_set(&dd->irq_workers_active, workers);
820 for (i = 1; i < MTIP_MAX_SLOT_GROUPS; i++) {
821 twork = &dd->work[i];
822 if (twork->completed)
829 if (likely(dd->work[0].completed))
830 mtip_workq_sdbfx(port, 0,
831 dd->work[0].completed);
835 * Chip quirk: SDB interrupt but nothing
842 if (unlikely(port_stat & PORT_IRQ_ERR)) {
843 if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
844 /* don't proceed further */
847 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
851 mtip_process_errors(dd, port_stat & PORT_IRQ_ERR);
854 if (unlikely(port_stat & PORT_IRQ_LEGACY))
855 mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY);
858 /* acknowledge interrupt */
859 if (unlikely(do_irq_enable))
860 writel(hba_stat, dd->mmio + HOST_IRQ_STAT);
866 * HBA interrupt subroutine.
869 * @instance Pointer to the driver data structure.
872 * IRQ_HANDLED A HBA interrupt was pending and handled.
873 * IRQ_NONE This interrupt was not for the HBA.
875 static irqreturn_t mtip_irq_handler(int irq, void *instance)
877 struct driver_data *dd = instance;
879 return mtip_handle_irq(dd);
882 static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag)
884 writel(1 << MTIP_TAG_BIT(tag), port->cmd_issue[MTIP_TAG_INDEX(tag)]);
887 static bool mtip_pause_ncq(struct mtip_port *port,
888 struct host_to_dev_fis *fis)
890 struct host_to_dev_fis *reply;
891 unsigned long task_file_data;
893 reply = port->rxfis + RX_FIS_D2H_REG;
894 task_file_data = readl(port->mmio+PORT_TFDATA);
896 if ((task_file_data & 1))
899 if (fis->command == ATA_CMD_SEC_ERASE_PREP) {
900 port->ic_pause_timer = jiffies;
902 } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) &&
903 (fis->features == 0x03)) {
904 set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
905 port->ic_pause_timer = jiffies;
907 } else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) ||
908 ((fis->command == 0xFC) &&
909 (fis->features == 0x27 || fis->features == 0x72 ||
910 fis->features == 0x62 || fis->features == 0x26))) {
911 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
912 clear_bit(MTIP_DDF_REBUILD_FAILED_BIT, &port->dd->dd_flag);
913 /* Com reset after secure erase or lowlevel format */
914 mtip_restart_port(port);
915 clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
922 static bool mtip_commands_active(struct mtip_port *port)
928 * Ignore s_active bit 0 of array element 0.
929 * This bit will always be set
931 active = readl(port->s_active[0]) & 0xFFFFFFFE;
932 for (n = 1; n < port->dd->slot_groups; n++)
933 active |= readl(port->s_active[n]);
939 * Wait for port to quiesce
941 * @port Pointer to port data structure
942 * @timeout Max duration to wait (ms)
946 * -EBUSY Commands still active
948 static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
953 blk_mq_quiesce_queue(port->dd->queue);
955 to = jiffies + msecs_to_jiffies(timeout);
957 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) &&
958 test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
960 continue; /* svc thd is actively issuing commands */
965 if (mtip_check_surprise_removal(port->dd->pdev))
968 active = mtip_commands_active(port);
971 } while (time_before(jiffies, to));
973 blk_mq_unquiesce_queue(port->dd->queue);
974 return active ? -EBUSY : 0;
976 blk_mq_unquiesce_queue(port->dd->queue);
980 struct mtip_int_cmd {
988 * Execute an internal command and wait for the completion.
990 * @port Pointer to the port data structure.
991 * @fis Pointer to the FIS that describes the command.
992 * @fis_len Length in WORDS of the FIS.
993 * @buffer DMA accessible for command data.
994 * @buf_len Length, in bytes, of the data buffer.
995 * @opts Command header options, excluding the FIS length
996 * and the number of PRD entries.
997 * @timeout Time in ms to wait for the command to complete.
1000 * 0 Command completed successfully.
1001 * -EFAULT The buffer address is not correctly aligned.
1002 * -EBUSY Internal command or other IO in progress.
1003 * -EAGAIN Time out waiting for command to complete.
1005 static int mtip_exec_internal_command(struct mtip_port *port,
1006 struct host_to_dev_fis *fis,
1011 unsigned long timeout)
1013 struct mtip_cmd *int_cmd;
1014 struct driver_data *dd = port->dd;
1016 struct mtip_int_cmd icmd = {
1023 unsigned long start;
1025 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
1026 if (buffer & 0x00000007) {
1027 dev_err(&dd->pdev->dev, "SG buffer is not 8 byte aligned\n");
1031 int_cmd = mtip_get_int_command(dd);
1033 dbg_printk(MTIP_DRV_NAME "Unable to allocate tag for PIO cmd\n");
1036 rq = blk_mq_rq_from_pdu(int_cmd);
1037 rq->special = &icmd;
1039 set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
1041 if (fis->command == ATA_CMD_SEC_ERASE_PREP)
1042 set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
1044 clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
1046 if (fis->command != ATA_CMD_STANDBYNOW1) {
1047 /* wait for io to complete if non atomic */
1048 if (mtip_quiesce_io(port, MTIP_QUIESCE_IO_TIMEOUT_MS) < 0) {
1049 dev_warn(&dd->pdev->dev, "Failed to quiesce IO\n");
1050 blk_mq_free_request(rq);
1051 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
1052 wake_up_interruptible(&port->svc_wait);
1057 /* Copy the command to the command table */
1058 memcpy(int_cmd->command, fis, fis_len*4);
1061 rq->timeout = timeout;
1063 /* insert request and run queue */
1064 blk_execute_rq(rq->q, NULL, rq, true);
1066 if (int_cmd->status) {
1067 dev_err(&dd->pdev->dev, "Internal command [%02X] failed %d\n",
1068 fis->command, int_cmd->status);
1071 if (mtip_check_surprise_removal(dd->pdev) ||
1072 test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
1074 dev_err(&dd->pdev->dev,
1075 "Internal command [%02X] wait returned due to SR\n",
1080 mtip_device_reset(dd); /* recover from timeout issue */
1085 if (readl(port->cmd_issue[MTIP_TAG_INDEX(MTIP_TAG_INTERNAL)])
1086 & (1 << MTIP_TAG_BIT(MTIP_TAG_INTERNAL))) {
1088 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
1089 mtip_device_reset(dd);
1094 /* Clear the allocated and active bits for the internal command. */
1095 blk_mq_free_request(rq);
1096 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
1097 if (rv >= 0 && mtip_pause_ncq(port, fis)) {
1101 wake_up_interruptible(&port->svc_wait);
1107 * Byte-swap ATA ID strings.
1109 * ATA identify data contains strings in byte-swapped 16-bit words.
1110 * They must be swapped (on all architectures) to be usable as C strings.
1111 * This function swaps bytes in-place.
1113 * @buf The buffer location of the string
1114 * @len The number of bytes to swap
1119 static inline void ata_swap_string(u16 *buf, unsigned int len)
1122 for (i = 0; i < (len/2); i++)
1123 be16_to_cpus(&buf[i]);
1126 static void mtip_set_timeout(struct driver_data *dd,
1127 struct host_to_dev_fis *fis,
1128 unsigned int *timeout, u8 erasemode)
1130 switch (fis->command) {
1131 case ATA_CMD_DOWNLOAD_MICRO:
1132 *timeout = 120000; /* 2 minutes */
1134 case ATA_CMD_SEC_ERASE_UNIT:
1137 *timeout = ((*(dd->port->identify + 90) * 2) * 60000);
1139 *timeout = ((*(dd->port->identify + 89) * 2) * 60000);
1141 case ATA_CMD_STANDBYNOW1:
1142 *timeout = 120000; /* 2 minutes */
1146 *timeout = 60000; /* 60 seconds */
1149 *timeout = 15000; /* 15 seconds */
1152 *timeout = MTIP_IOCTL_CMD_TIMEOUT_MS;
1158 * Request the device identity information.
1160 * If a user space buffer is not specified, i.e. is NULL, the
1161 * identify information is still read from the drive and placed
1162 * into the identify data buffer (@e port->identify) in the
1163 * port data structure.
1164 * When the identify buffer contains valid identify information @e
1165 * port->identify_valid is non-zero.
1167 * @port Pointer to the port structure.
1168 * @user_buffer A user space buffer where the identify data should be
1172 * 0 Command completed successfully.
1173 * -EFAULT An error occurred while coping data to the user buffer.
1174 * -1 Command failed.
1176 static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
1179 struct host_to_dev_fis fis;
1181 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
1184 /* Build the FIS. */
1185 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1188 fis.command = ATA_CMD_ID_ATA;
1190 /* Set the identify information as invalid. */
1191 port->identify_valid = 0;
1193 /* Clear the identify information. */
1194 memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS);
1196 /* Execute the command. */
1197 if (mtip_exec_internal_command(port,
1201 sizeof(u16) * ATA_ID_WORDS,
1203 MTIP_INT_CMD_TIMEOUT_MS)
1210 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1211 * perform field-sensitive swapping on the string fields.
1212 * See the kernel use of ata_id_string() for proof of this.
1214 #ifdef __LITTLE_ENDIAN
1215 ata_swap_string(port->identify + 27, 40); /* model string*/
1216 ata_swap_string(port->identify + 23, 8); /* firmware string*/
1217 ata_swap_string(port->identify + 10, 20); /* serial# string*/
1221 for (i = 0; i < ATA_ID_WORDS; i++)
1222 port->identify[i] = le16_to_cpu(port->identify[i]);
1226 /* Check security locked state */
1227 if (port->identify[128] & 0x4)
1228 set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
1230 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
1232 #ifdef MTIP_TRIM /* Disabling TRIM support temporarily */
1233 /* Demux ID.DRAT & ID.RZAT to determine trim support */
1234 if (port->identify[69] & (1 << 14) && port->identify[69] & (1 << 5))
1235 port->dd->trim_supp = true;
1238 port->dd->trim_supp = false;
1240 /* Set the identify buffer as valid. */
1241 port->identify_valid = 1;
1247 ATA_ID_WORDS * sizeof(u16))) {
1258 * Issue a standby immediate command to the device.
1260 * @port Pointer to the port structure.
1263 * 0 Command was executed successfully.
1264 * -1 An error occurred while executing the command.
1266 static int mtip_standby_immediate(struct mtip_port *port)
1269 struct host_to_dev_fis fis;
1270 unsigned long start;
1271 unsigned int timeout;
1273 /* Build the FIS. */
1274 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1277 fis.command = ATA_CMD_STANDBYNOW1;
1279 mtip_set_timeout(port->dd, &fis, &timeout, 0);
1282 rv = mtip_exec_internal_command(port,
1289 dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n",
1290 jiffies_to_msecs(jiffies - start));
1292 dev_warn(&port->dd->pdev->dev,
1293 "STANDBY IMMEDIATE command failed.\n");
1299 * Issue a READ LOG EXT command to the device.
1301 * @port pointer to the port structure.
1302 * @page page number to fetch
1303 * @buffer pointer to buffer
1304 * @buffer_dma dma address corresponding to @buffer
1305 * @sectors page length to fetch, in sectors
1308 * @rv return value from mtip_exec_internal_command()
1310 static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
1311 dma_addr_t buffer_dma, unsigned int sectors)
1313 struct host_to_dev_fis fis;
1315 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1318 fis.command = ATA_CMD_READ_LOG_EXT;
1319 fis.sect_count = sectors & 0xFF;
1320 fis.sect_cnt_ex = (sectors >> 8) & 0xFF;
1323 fis.device = ATA_DEVICE_OBS;
1325 memset(buffer, 0, sectors * ATA_SECT_SIZE);
1327 return mtip_exec_internal_command(port,
1331 sectors * ATA_SECT_SIZE,
1333 MTIP_INT_CMD_TIMEOUT_MS);
1337 * Issue a SMART READ DATA command to the device.
1339 * @port pointer to the port structure.
1340 * @buffer pointer to buffer
1341 * @buffer_dma dma address corresponding to @buffer
1344 * @rv return value from mtip_exec_internal_command()
1346 static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer,
1347 dma_addr_t buffer_dma)
1349 struct host_to_dev_fis fis;
1351 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1354 fis.command = ATA_CMD_SMART;
1355 fis.features = 0xD0;
1359 fis.device = ATA_DEVICE_OBS;
1361 return mtip_exec_internal_command(port,
1371 * Get the value of a smart attribute
1373 * @port pointer to the port structure
1374 * @id attribute number
1375 * @attrib pointer to return attrib information corresponding to @id
1378 * -EINVAL NULL buffer passed or unsupported attribute @id.
1379 * -EPERM Identify data not valid, SMART not supported or not enabled
1381 static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
1382 struct smart_attr *attrib)
1385 struct smart_attr *pattr;
1390 if (!port->identify_valid) {
1391 dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n");
1394 if (!(port->identify[82] & 0x1)) {
1395 dev_warn(&port->dd->pdev->dev, "SMART not supported\n");
1398 if (!(port->identify[85] & 0x1)) {
1399 dev_warn(&port->dd->pdev->dev, "SMART not enabled\n");
1403 memset(port->smart_buf, 0, ATA_SECT_SIZE);
1404 rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma);
1406 dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n");
1410 pattr = (struct smart_attr *)(port->smart_buf + 2);
1411 for (i = 0; i < 29; i++, pattr++)
1412 if (pattr->attr_id == id) {
1413 memcpy(attrib, pattr, sizeof(struct smart_attr));
1418 dev_warn(&port->dd->pdev->dev,
1419 "Query for invalid SMART attribute ID\n");
1427 * Trim unused sectors
1429 * @dd pointer to driver_data structure
1431 * @len # of 512b sectors to trim
1434 * -ENOMEM Out of dma memory
1435 * -EINVAL Invalid parameters passed in, trim not supported
1436 * -EIO Error submitting trim request to hw
1438 static int mtip_send_trim(struct driver_data *dd, unsigned int lba,
1442 u64 tlba, tlen, sect_left;
1443 struct mtip_trim_entry *buf;
1444 dma_addr_t dma_addr;
1445 struct host_to_dev_fis fis;
1447 if (!len || dd->trim_supp == false)
1450 /* Trim request too big */
1451 WARN_ON(len > (MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES));
1453 /* Trim request not aligned on 4k boundary */
1454 WARN_ON(len % 8 != 0);
1456 /* Warn if vu_trim structure is too big */
1457 WARN_ON(sizeof(struct mtip_trim) > ATA_SECT_SIZE);
1459 /* Allocate a DMA buffer for the trim structure */
1460 buf = dmam_alloc_coherent(&dd->pdev->dev, ATA_SECT_SIZE, &dma_addr,
1464 memset(buf, 0, ATA_SECT_SIZE);
1466 for (i = 0, sect_left = len, tlba = lba;
1467 i < MTIP_MAX_TRIM_ENTRIES && sect_left;
1469 tlen = (sect_left >= MTIP_MAX_TRIM_ENTRY_LEN ?
1470 MTIP_MAX_TRIM_ENTRY_LEN :
1472 buf[i].lba = __force_bit2int cpu_to_le32(tlba);
1473 buf[i].range = __force_bit2int cpu_to_le16(tlen);
1477 WARN_ON(sect_left != 0);
1480 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1484 fis.features = 0x60;
1486 fis.device = ATA_DEVICE_OBS;
1488 if (mtip_exec_internal_command(dd->port,
1494 MTIP_TRIM_TIMEOUT_MS) < 0)
1497 dmam_free_coherent(&dd->pdev->dev, ATA_SECT_SIZE, buf, dma_addr);
1502 * Get the drive capacity.
1504 * @dd Pointer to the device data structure.
1505 * @sectors Pointer to the variable that will receive the sector count.
1508 * 1 Capacity was returned successfully.
1509 * 0 The identify information is invalid.
1511 static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors)
1513 struct mtip_port *port = dd->port;
1514 u64 total, raw0, raw1, raw2, raw3;
1515 raw0 = port->identify[100];
1516 raw1 = port->identify[101];
1517 raw2 = port->identify[102];
1518 raw3 = port->identify[103];
1519 total = raw0 | raw1<<16 | raw2<<32 | raw3<<48;
1521 return (bool) !!port->identify_valid;
1525 * Display the identify command data.
1527 * @port Pointer to the port data structure.
1532 static void mtip_dump_identify(struct mtip_port *port)
1535 unsigned short revid;
1538 if (!port->identify_valid)
1541 strlcpy(cbuf, (char *)(port->identify+10), 21);
1542 dev_info(&port->dd->pdev->dev,
1543 "Serial No.: %s\n", cbuf);
1545 strlcpy(cbuf, (char *)(port->identify+23), 9);
1546 dev_info(&port->dd->pdev->dev,
1547 "Firmware Ver.: %s\n", cbuf);
1549 strlcpy(cbuf, (char *)(port->identify+27), 41);
1550 dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf);
1552 dev_info(&port->dd->pdev->dev, "Security: %04x %s\n",
1553 port->identify[128],
1554 port->identify[128] & 0x4 ? "(LOCKED)" : "");
1556 if (mtip_hw_get_capacity(port->dd, §ors))
1557 dev_info(&port->dd->pdev->dev,
1558 "Capacity: %llu sectors (%llu MB)\n",
1560 ((u64)sectors) * ATA_SECT_SIZE >> 20);
1562 pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid);
1563 switch (revid & 0xFF) {
1565 strlcpy(cbuf, "A0", 3);
1568 strlcpy(cbuf, "A2", 3);
1571 strlcpy(cbuf, "?", 2);
1574 dev_info(&port->dd->pdev->dev,
1575 "Card Type: %s\n", cbuf);
1579 * Map the commands scatter list into the command table.
1581 * @command Pointer to the command.
1582 * @nents Number of scatter list entries.
1587 static inline void fill_command_sg(struct driver_data *dd,
1588 struct mtip_cmd *command,
1592 unsigned int dma_len;
1593 struct mtip_cmd_sg *command_sg;
1594 struct scatterlist *sg = command->sg;
1596 command_sg = command->command + AHCI_CMD_TBL_HDR_SZ;
1598 for (n = 0; n < nents; n++) {
1599 dma_len = sg_dma_len(sg);
1600 if (dma_len > 0x400000)
1601 dev_err(&dd->pdev->dev,
1602 "DMA segment length truncated\n");
1603 command_sg->info = __force_bit2int
1604 cpu_to_le32((dma_len-1) & 0x3FFFFF);
1605 command_sg->dba = __force_bit2int
1606 cpu_to_le32(sg_dma_address(sg));
1607 command_sg->dba_upper = __force_bit2int
1608 cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
1615 * @brief Execute a drive command.
1617 * return value 0 The command completed successfully.
1618 * return value -1 An error occurred while executing the command.
1620 static int exec_drive_task(struct mtip_port *port, u8 *command)
1622 struct host_to_dev_fis fis;
1623 struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG);
1626 /* Build the FIS. */
1627 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1630 fis.command = command[0];
1631 fis.features = command[1];
1632 fis.sect_count = command[2];
1633 fis.sector = command[3];
1634 fis.cyl_low = command[4];
1635 fis.cyl_hi = command[5];
1636 fis.device = command[6] & ~0x10; /* Clear the dev bit*/
1638 mtip_set_timeout(port->dd, &fis, &to, 0);
1640 dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
1650 /* Execute the command. */
1651 if (mtip_exec_internal_command(port,
1661 command[0] = reply->command; /* Status*/
1662 command[1] = reply->features; /* Error*/
1663 command[4] = reply->cyl_low;
1664 command[5] = reply->cyl_hi;
1666 dbg_printk(MTIP_DRV_NAME " %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
1677 * @brief Execute a drive command.
1679 * @param port Pointer to the port data structure.
1680 * @param command Pointer to the user specified command parameters.
1681 * @param user_buffer Pointer to the user space buffer where read sector
1682 * data should be copied.
1684 * return value 0 The command completed successfully.
1685 * return value -EFAULT An error occurred while copying the completion
1686 * data to the user space buffer.
1687 * return value -1 An error occurred while executing the command.
1689 static int exec_drive_command(struct mtip_port *port, u8 *command,
1690 void __user *user_buffer)
1692 struct host_to_dev_fis fis;
1693 struct host_to_dev_fis *reply;
1695 dma_addr_t dma_addr = 0;
1696 int rv = 0, xfer_sz = command[3];
1703 buf = dmam_alloc_coherent(&port->dd->pdev->dev,
1704 ATA_SECT_SIZE * xfer_sz,
1708 dev_err(&port->dd->pdev->dev,
1709 "Memory allocation failed (%d bytes)\n",
1710 ATA_SECT_SIZE * xfer_sz);
1713 memset(buf, 0, ATA_SECT_SIZE * xfer_sz);
1716 /* Build the FIS. */
1717 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1720 fis.command = command[0];
1721 fis.features = command[2];
1722 fis.sect_count = command[3];
1723 if (fis.command == ATA_CMD_SMART) {
1724 fis.sector = command[1];
1729 mtip_set_timeout(port->dd, &fis, &to, 0);
1732 reply = (port->rxfis + RX_FIS_PIO_SETUP);
1734 reply = (port->rxfis + RX_FIS_D2H_REG);
1736 dbg_printk(MTIP_DRV_NAME
1737 " %s: User Command: cmd %x, sect %x, "
1738 "feat %x, sectcnt %x\n",
1745 /* Execute the command. */
1746 if (mtip_exec_internal_command(port,
1749 (xfer_sz ? dma_addr : 0),
1750 (xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0),
1755 goto exit_drive_command;
1758 /* Collect the completion status. */
1759 command[0] = reply->command; /* Status*/
1760 command[1] = reply->features; /* Error*/
1761 command[2] = reply->sect_count;
1763 dbg_printk(MTIP_DRV_NAME
1764 " %s: Completion Status: stat %x, "
1765 "err %x, nsect %x\n",
1772 if (copy_to_user(user_buffer,
1774 ATA_SECT_SIZE * command[3])) {
1776 goto exit_drive_command;
1781 dmam_free_coherent(&port->dd->pdev->dev,
1782 ATA_SECT_SIZE * xfer_sz, buf, dma_addr);
1787 * Indicates whether a command has a single sector payload.
1789 * @command passed to the device to perform the certain event.
1790 * @features passed to the device to perform the certain event.
1793 * 1 command is one that always has a single sector payload,
1794 * regardless of the value in the Sector Count field.
1798 static unsigned int implicit_sector(unsigned char command,
1799 unsigned char features)
1801 unsigned int rv = 0;
1803 /* list of commands that have an implicit sector count of 1 */
1805 case ATA_CMD_SEC_SET_PASS:
1806 case ATA_CMD_SEC_UNLOCK:
1807 case ATA_CMD_SEC_ERASE_PREP:
1808 case ATA_CMD_SEC_ERASE_UNIT:
1809 case ATA_CMD_SEC_FREEZE_LOCK:
1810 case ATA_CMD_SEC_DISABLE_PASS:
1811 case ATA_CMD_PMP_READ:
1812 case ATA_CMD_PMP_WRITE:
1815 case ATA_CMD_SET_MAX:
1816 if (features == ATA_SET_MAX_UNLOCK)
1820 if ((features == ATA_SMART_READ_VALUES) ||
1821 (features == ATA_SMART_READ_THRESHOLDS))
1824 case ATA_CMD_CONF_OVERLAY:
1825 if ((features == ATA_DCO_IDENTIFY) ||
1826 (features == ATA_DCO_SET))
1834 * Executes a taskfile
1835 * See ide_taskfile_ioctl() for derivation
1837 static int exec_drive_taskfile(struct driver_data *dd,
1839 ide_task_request_t *req_task,
1842 struct host_to_dev_fis fis;
1843 struct host_to_dev_fis *reply;
1846 dma_addr_t outbuf_dma = 0;
1847 dma_addr_t inbuf_dma = 0;
1848 dma_addr_t dma_buffer = 0;
1850 unsigned int taskin = 0;
1851 unsigned int taskout = 0;
1853 unsigned int timeout;
1854 unsigned int force_single_sector;
1855 unsigned int transfer_size;
1856 unsigned long task_file_data;
1857 int intotal = outtotal + req_task->out_size;
1860 taskout = req_task->out_size;
1861 taskin = req_task->in_size;
1862 /* 130560 = 512 * 0xFF*/
1863 if (taskin > 130560 || taskout > 130560)
1867 outbuf = memdup_user(buf + outtotal, taskout);
1869 return PTR_ERR(outbuf);
1871 outbuf_dma = pci_map_single(dd->pdev,
1875 if (pci_dma_mapping_error(dd->pdev, outbuf_dma)) {
1879 dma_buffer = outbuf_dma;
1883 inbuf = memdup_user(buf + intotal, taskin);
1884 if (IS_ERR(inbuf)) {
1885 err = PTR_ERR(inbuf);
1889 inbuf_dma = pci_map_single(dd->pdev,
1891 taskin, DMA_FROM_DEVICE);
1892 if (pci_dma_mapping_error(dd->pdev, inbuf_dma)) {
1896 dma_buffer = inbuf_dma;
1899 /* only supports PIO and non-data commands from this ioctl. */
1900 switch (req_task->data_phase) {
1902 nsect = taskout / ATA_SECT_SIZE;
1903 reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
1906 reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
1908 case TASKFILE_NO_DATA:
1909 reply = (dd->port->rxfis + RX_FIS_D2H_REG);
1916 /* Build the FIS. */
1917 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1921 fis.command = req_task->io_ports[7];
1922 fis.features = req_task->io_ports[1];
1923 fis.sect_count = req_task->io_ports[2];
1924 fis.lba_low = req_task->io_ports[3];
1925 fis.lba_mid = req_task->io_ports[4];
1926 fis.lba_hi = req_task->io_ports[5];
1927 /* Clear the dev bit*/
1928 fis.device = req_task->io_ports[6] & ~0x10;
1930 if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) {
1931 req_task->in_flags.all =
1932 IDE_TASKFILE_STD_IN_FLAGS |
1933 (IDE_HOB_STD_IN_FLAGS << 8);
1934 fis.lba_low_ex = req_task->hob_ports[3];
1935 fis.lba_mid_ex = req_task->hob_ports[4];
1936 fis.lba_hi_ex = req_task->hob_ports[5];
1937 fis.features_ex = req_task->hob_ports[1];
1938 fis.sect_cnt_ex = req_task->hob_ports[2];
1941 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
1944 force_single_sector = implicit_sector(fis.command, fis.features);
1946 if ((taskin || taskout) && (!fis.sect_count)) {
1948 fis.sect_count = nsect;
1950 if (!force_single_sector) {
1951 dev_warn(&dd->pdev->dev,
1952 "data movement but "
1953 "sect_count is 0\n");
1960 dbg_printk(MTIP_DRV_NAME
1961 " %s: cmd %x, feat %x, nsect %x,"
1962 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
1973 /* check for erase mode support during secure erase.*/
1974 if ((fis.command == ATA_CMD_SEC_ERASE_UNIT) && outbuf &&
1975 (outbuf[0] & MTIP_SEC_ERASE_MODE)) {
1979 mtip_set_timeout(dd, &fis, &timeout, erasemode);
1981 /* Determine the correct transfer size.*/
1982 if (force_single_sector)
1983 transfer_size = ATA_SECT_SIZE;
1985 transfer_size = ATA_SECT_SIZE * fis.sect_count;
1987 /* Execute the command.*/
1988 if (mtip_exec_internal_command(dd->port,
1999 task_file_data = readl(dd->port->mmio+PORT_TFDATA);
2001 if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) {
2002 reply = dd->port->rxfis + RX_FIS_PIO_SETUP;
2003 req_task->io_ports[7] = reply->control;
2005 reply = dd->port->rxfis + RX_FIS_D2H_REG;
2006 req_task->io_ports[7] = reply->command;
2009 /* reclaim the DMA buffers.*/
2011 pci_unmap_single(dd->pdev, inbuf_dma,
2012 taskin, DMA_FROM_DEVICE);
2014 pci_unmap_single(dd->pdev, outbuf_dma,
2015 taskout, DMA_TO_DEVICE);
2019 /* return the ATA registers to the caller.*/
2020 req_task->io_ports[1] = reply->features;
2021 req_task->io_ports[2] = reply->sect_count;
2022 req_task->io_ports[3] = reply->lba_low;
2023 req_task->io_ports[4] = reply->lba_mid;
2024 req_task->io_ports[5] = reply->lba_hi;
2025 req_task->io_ports[6] = reply->device;
2027 if (req_task->out_flags.all & 1) {
2029 req_task->hob_ports[3] = reply->lba_low_ex;
2030 req_task->hob_ports[4] = reply->lba_mid_ex;
2031 req_task->hob_ports[5] = reply->lba_hi_ex;
2032 req_task->hob_ports[1] = reply->features_ex;
2033 req_task->hob_ports[2] = reply->sect_cnt_ex;
2035 dbg_printk(MTIP_DRV_NAME
2036 " %s: Completion: stat %x,"
2037 "err %x, sect_cnt %x, lbalo %x,"
2038 "lbamid %x, lbahi %x, dev %x\n",
2040 req_task->io_ports[7],
2041 req_task->io_ports[1],
2042 req_task->io_ports[2],
2043 req_task->io_ports[3],
2044 req_task->io_ports[4],
2045 req_task->io_ports[5],
2046 req_task->io_ports[6]);
2049 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
2055 if (copy_to_user(buf + intotal, inbuf, taskin)) {
2062 pci_unmap_single(dd->pdev, inbuf_dma,
2063 taskin, DMA_FROM_DEVICE);
2065 pci_unmap_single(dd->pdev, outbuf_dma,
2066 taskout, DMA_TO_DEVICE);
2074 * Handle IOCTL calls from the Block Layer.
2076 * This function is called by the Block Layer when it receives an IOCTL
2077 * command that it does not understand. If the IOCTL command is not supported
2078 * this function returns -ENOTTY.
2080 * @dd Pointer to the driver data structure.
2081 * @cmd IOCTL command passed from the Block Layer.
2082 * @arg IOCTL argument passed from the Block Layer.
2085 * 0 The IOCTL completed successfully.
2086 * -ENOTTY The specified command is not supported.
2087 * -EFAULT An error occurred copying data to a user space buffer.
2088 * -EIO An error occurred while executing the command.
2090 static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd,
2094 case HDIO_GET_IDENTITY:
2096 if (copy_to_user((void __user *)arg, dd->port->identify,
2097 sizeof(u16) * ATA_ID_WORDS))
2101 case HDIO_DRIVE_CMD:
2103 u8 drive_command[4];
2105 /* Copy the user command info to our buffer. */
2106 if (copy_from_user(drive_command,
2107 (void __user *) arg,
2108 sizeof(drive_command)))
2111 /* Execute the drive command. */
2112 if (exec_drive_command(dd->port,
2114 (void __user *) (arg+4)))
2117 /* Copy the status back to the users buffer. */
2118 if (copy_to_user((void __user *) arg,
2120 sizeof(drive_command)))
2125 case HDIO_DRIVE_TASK:
2127 u8 drive_command[7];
2129 /* Copy the user command info to our buffer. */
2130 if (copy_from_user(drive_command,
2131 (void __user *) arg,
2132 sizeof(drive_command)))
2135 /* Execute the drive command. */
2136 if (exec_drive_task(dd->port, drive_command))
2139 /* Copy the status back to the users buffer. */
2140 if (copy_to_user((void __user *) arg,
2142 sizeof(drive_command)))
2147 case HDIO_DRIVE_TASKFILE: {
2148 ide_task_request_t req_task;
2151 if (copy_from_user(&req_task, (void __user *) arg,
2155 outtotal = sizeof(req_task);
2157 ret = exec_drive_taskfile(dd, (void __user *) arg,
2158 &req_task, outtotal);
2160 if (copy_to_user((void __user *) arg, &req_task,
2174 * Submit an IO to the hw
2176 * This function is called by the block layer to issue an io
2177 * to the device. Upon completion, the callback function will
2178 * be called with the data parameter passed as the callback data.
2180 * @dd Pointer to the driver data structure.
2181 * @start First sector to read.
2182 * @nsect Number of sectors to read.
2183 * @nents Number of entries in scatter list for the read command.
2184 * @tag The tag of this read command.
2185 * @callback Pointer to the function that should be called
2186 * when the read completes.
2187 * @data Callback data passed to the callback function
2188 * when the read completes.
2189 * @dir Direction (read or write)
2194 static void mtip_hw_submit_io(struct driver_data *dd, struct request *rq,
2195 struct mtip_cmd *command, int nents,
2196 struct blk_mq_hw_ctx *hctx)
2198 struct host_to_dev_fis *fis;
2199 struct mtip_port *port = dd->port;
2200 int dma_dir = rq_data_dir(rq) == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
2201 u64 start = blk_rq_pos(rq);
2202 unsigned int nsect = blk_rq_sectors(rq);
2204 /* Map the scatter list for DMA access */
2205 nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir);
2207 prefetch(&port->flags);
2209 command->scatter_ents = nents;
2212 * The number of retries for this command before it is
2213 * reported as a failure to the upper layers.
2215 command->retries = MTIP_MAX_RETRIES;
2218 fis = command->command;
2221 if (dma_dir == DMA_FROM_DEVICE)
2222 fis->command = ATA_CMD_FPDMA_READ;
2224 fis->command = ATA_CMD_FPDMA_WRITE;
2225 fis->lba_low = start & 0xFF;
2226 fis->lba_mid = (start >> 8) & 0xFF;
2227 fis->lba_hi = (start >> 16) & 0xFF;
2228 fis->lba_low_ex = (start >> 24) & 0xFF;
2229 fis->lba_mid_ex = (start >> 32) & 0xFF;
2230 fis->lba_hi_ex = (start >> 40) & 0xFF;
2231 fis->device = 1 << 6;
2232 fis->features = nsect & 0xFF;
2233 fis->features_ex = (nsect >> 8) & 0xFF;
2234 fis->sect_count = ((rq->tag << 3) | (rq->tag >> 5));
2235 fis->sect_cnt_ex = 0;
2239 fill_command_sg(dd, command, nents);
2241 if (unlikely(command->unaligned))
2242 fis->device |= 1 << 7;
2244 /* Populate the command header */
2245 command->command_header->opts =
2246 __force_bit2int cpu_to_le32(
2247 (nents << 16) | 5 | AHCI_CMD_PREFETCH);
2248 command->command_header->byte_count = 0;
2250 command->direction = dma_dir;
2253 * To prevent this command from being issued
2254 * if an internal command is in progress or error handling is active.
2256 if (unlikely(port->flags & MTIP_PF_PAUSE_IO)) {
2257 set_bit(rq->tag, port->cmds_to_issue);
2258 set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
2262 /* Issue the command to the hardware */
2263 mtip_issue_ncq_command(port, rq->tag);
2267 * Sysfs status dump.
2269 * @dev Pointer to the device structure, passed by the kernrel.
2270 * @attr Pointer to the device_attribute structure passed by the kernel.
2271 * @buf Pointer to the char buffer that will receive the stats info.
2274 * The size, in bytes, of the data copied into buf.
2276 static ssize_t mtip_hw_show_status(struct device *dev,
2277 struct device_attribute *attr,
2280 struct driver_data *dd = dev_to_disk(dev)->private_data;
2283 if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))
2284 size += sprintf(buf, "%s", "thermal_shutdown\n");
2285 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag))
2286 size += sprintf(buf, "%s", "write_protect\n");
2288 size += sprintf(buf, "%s", "online\n");
2293 static DEVICE_ATTR(status, S_IRUGO, mtip_hw_show_status, NULL);
2295 /* debugsfs entries */
2297 static ssize_t show_device_status(struct device_driver *drv, char *buf)
2300 struct driver_data *dd, *tmp;
2301 unsigned long flags;
2305 spin_lock_irqsave(&dev_lock, flags);
2306 size += sprintf(&buf[size], "Devices Present:\n");
2307 list_for_each_entry_safe(dd, tmp, &online_list, online_list) {
2310 dd->port->identify &&
2311 dd->port->identify_valid) {
2313 (char *) (dd->port->identify + 10), 21);
2314 status = *(dd->port->identify + 141);
2316 memset(id_buf, 0, 42);
2321 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
2322 size += sprintf(&buf[size],
2323 " device %s %s (ftl rebuild %d %%)\n",
2324 dev_name(&dd->pdev->dev),
2328 size += sprintf(&buf[size],
2330 dev_name(&dd->pdev->dev),
2336 size += sprintf(&buf[size], "Devices Being Removed:\n");
2337 list_for_each_entry_safe(dd, tmp, &removing_list, remove_list) {
2340 dd->port->identify &&
2341 dd->port->identify_valid) {
2343 (char *) (dd->port->identify+10), 21);
2344 status = *(dd->port->identify + 141);
2346 memset(id_buf, 0, 42);
2351 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
2352 size += sprintf(&buf[size],
2353 " device %s %s (ftl rebuild %d %%)\n",
2354 dev_name(&dd->pdev->dev),
2358 size += sprintf(&buf[size],
2360 dev_name(&dd->pdev->dev),
2365 spin_unlock_irqrestore(&dev_lock, flags);
2370 static ssize_t mtip_hw_read_device_status(struct file *f, char __user *ubuf,
2371 size_t len, loff_t *offset)
2373 struct driver_data *dd = (struct driver_data *)f->private_data;
2378 if (!len || *offset)
2381 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
2383 dev_err(&dd->pdev->dev,
2384 "Memory allocation: status buffer\n");
2388 size += show_device_status(NULL, buf);
2390 *offset = size <= len ? size : len;
2391 size = copy_to_user(ubuf, buf, *offset);
2396 return rv ? rv : *offset;
2399 static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf,
2400 size_t len, loff_t *offset)
2402 struct driver_data *dd = (struct driver_data *)f->private_data;
2404 u32 group_allocated;
2411 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
2413 dev_err(&dd->pdev->dev,
2414 "Memory allocation: register buffer\n");
2418 size += sprintf(&buf[size], "H/ S ACTive : [ 0x");
2420 for (n = dd->slot_groups-1; n >= 0; n--)
2421 size += sprintf(&buf[size], "%08X ",
2422 readl(dd->port->s_active[n]));
2424 size += sprintf(&buf[size], "]\n");
2425 size += sprintf(&buf[size], "H/ Command Issue : [ 0x");
2427 for (n = dd->slot_groups-1; n >= 0; n--)
2428 size += sprintf(&buf[size], "%08X ",
2429 readl(dd->port->cmd_issue[n]));
2431 size += sprintf(&buf[size], "]\n");
2432 size += sprintf(&buf[size], "H/ Completed : [ 0x");
2434 for (n = dd->slot_groups-1; n >= 0; n--)
2435 size += sprintf(&buf[size], "%08X ",
2436 readl(dd->port->completed[n]));
2438 size += sprintf(&buf[size], "]\n");
2439 size += sprintf(&buf[size], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
2440 readl(dd->port->mmio + PORT_IRQ_STAT));
2441 size += sprintf(&buf[size], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
2442 readl(dd->mmio + HOST_IRQ_STAT));
2443 size += sprintf(&buf[size], "\n");
2445 size += sprintf(&buf[size], "L/ Commands in Q : [ 0x");
2447 for (n = dd->slot_groups-1; n >= 0; n--) {
2448 if (sizeof(long) > sizeof(u32))
2450 dd->port->cmds_to_issue[n/2] >> (32*(n&1));
2452 group_allocated = dd->port->cmds_to_issue[n];
2453 size += sprintf(&buf[size], "%08X ", group_allocated);
2455 size += sprintf(&buf[size], "]\n");
2457 *offset = size <= len ? size : len;
2458 size = copy_to_user(ubuf, buf, *offset);
2463 return rv ? rv : *offset;
2466 static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf,
2467 size_t len, loff_t *offset)
2469 struct driver_data *dd = (struct driver_data *)f->private_data;
2477 buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
2479 dev_err(&dd->pdev->dev,
2480 "Memory allocation: flag buffer\n");
2484 size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n",
2486 size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n",
2489 *offset = size <= len ? size : len;
2490 size = copy_to_user(ubuf, buf, *offset);
2495 return rv ? rv : *offset;
2498 static const struct file_operations mtip_device_status_fops = {
2499 .owner = THIS_MODULE,
2500 .open = simple_open,
2501 .read = mtip_hw_read_device_status,
2502 .llseek = no_llseek,
2505 static const struct file_operations mtip_regs_fops = {
2506 .owner = THIS_MODULE,
2507 .open = simple_open,
2508 .read = mtip_hw_read_registers,
2509 .llseek = no_llseek,
2512 static const struct file_operations mtip_flags_fops = {
2513 .owner = THIS_MODULE,
2514 .open = simple_open,
2515 .read = mtip_hw_read_flags,
2516 .llseek = no_llseek,
2520 * Create the sysfs related attributes.
2522 * @dd Pointer to the driver data structure.
2523 * @kobj Pointer to the kobj for the block device.
2526 * 0 Operation completed successfully.
2527 * -EINVAL Invalid parameter.
2529 static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj)
2534 if (sysfs_create_file(kobj, &dev_attr_status.attr))
2535 dev_warn(&dd->pdev->dev,
2536 "Error creating 'status' sysfs entry\n");
2541 * Remove the sysfs related attributes.
2543 * @dd Pointer to the driver data structure.
2544 * @kobj Pointer to the kobj for the block device.
2547 * 0 Operation completed successfully.
2548 * -EINVAL Invalid parameter.
2550 static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj)
2555 sysfs_remove_file(kobj, &dev_attr_status.attr);
2560 static int mtip_hw_debugfs_init(struct driver_data *dd)
2565 dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent);
2566 if (IS_ERR_OR_NULL(dd->dfs_node)) {
2567 dev_warn(&dd->pdev->dev,
2568 "Error creating node %s under debugfs\n",
2569 dd->disk->disk_name);
2570 dd->dfs_node = NULL;
2574 debugfs_create_file("flags", S_IRUGO, dd->dfs_node, dd,
2576 debugfs_create_file("registers", S_IRUGO, dd->dfs_node, dd,
2582 static void mtip_hw_debugfs_exit(struct driver_data *dd)
2585 debugfs_remove_recursive(dd->dfs_node);
2589 * Perform any init/resume time hardware setup
2591 * @dd Pointer to the driver data structure.
2596 static inline void hba_setup(struct driver_data *dd)
2599 hwdata = readl(dd->mmio + HOST_HSORG);
2601 /* interrupt bug workaround: use only 1 IS bit.*/
2603 HSORG_DISABLE_SLOTGRP_INTR |
2604 HSORG_DISABLE_SLOTGRP_PXIS,
2605 dd->mmio + HOST_HSORG);
2608 static int mtip_device_unaligned_constrained(struct driver_data *dd)
2610 return (dd->pdev->device == P420M_DEVICE_ID ? 1 : 0);
2614 * Detect the details of the product, and store anything needed
2615 * into the driver data structure. This includes product type and
2616 * version and number of slot groups.
2618 * @dd Pointer to the driver data structure.
2623 static void mtip_detect_product(struct driver_data *dd)
2626 unsigned int rev, slotgroups;
2629 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
2631 * [15:8] hardware/software interface rev#
2632 * [ 3] asic-style interface
2633 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
2635 hwdata = readl(dd->mmio + HOST_HSORG);
2637 dd->product_type = MTIP_PRODUCT_UNKNOWN;
2638 dd->slot_groups = 1;
2641 dd->product_type = MTIP_PRODUCT_ASICFPGA;
2642 rev = (hwdata & HSORG_HWREV) >> 8;
2643 slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1;
2644 dev_info(&dd->pdev->dev,
2645 "ASIC-FPGA design, HS rev 0x%x, "
2646 "%i slot groups [%i slots]\n",
2651 if (slotgroups > MTIP_MAX_SLOT_GROUPS) {
2652 dev_warn(&dd->pdev->dev,
2653 "Warning: driver only supports "
2654 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS);
2655 slotgroups = MTIP_MAX_SLOT_GROUPS;
2657 dd->slot_groups = slotgroups;
2661 dev_warn(&dd->pdev->dev, "Unrecognized product id\n");
2665 * Blocking wait for FTL rebuild to complete
2667 * @dd Pointer to the DRIVER_DATA structure.
2670 * 0 FTL rebuild completed successfully
2671 * -EFAULT FTL rebuild error/timeout/interruption
2673 static int mtip_ftl_rebuild_poll(struct driver_data *dd)
2675 unsigned long timeout, cnt = 0, start;
2677 dev_warn(&dd->pdev->dev,
2678 "FTL rebuild in progress. Polling for completion.\n");
2681 timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS);
2684 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
2687 if (mtip_check_surprise_removal(dd->pdev))
2690 if (mtip_get_identify(dd->port, NULL) < 0)
2693 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
2694 MTIP_FTL_REBUILD_MAGIC) {
2696 /* Print message every 3 minutes */
2698 dev_warn(&dd->pdev->dev,
2699 "FTL rebuild in progress (%d secs).\n",
2700 jiffies_to_msecs(jiffies - start) / 1000);
2704 dev_warn(&dd->pdev->dev,
2705 "FTL rebuild complete (%d secs).\n",
2706 jiffies_to_msecs(jiffies - start) / 1000);
2707 mtip_block_initialize(dd);
2710 } while (time_before(jiffies, timeout));
2712 /* Check for timeout */
2713 dev_err(&dd->pdev->dev,
2714 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
2715 jiffies_to_msecs(jiffies - start) / 1000);
2719 static void mtip_softirq_done_fn(struct request *rq)
2721 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
2722 struct driver_data *dd = rq->q->queuedata;
2724 /* Unmap the DMA scatter list entries */
2725 dma_unmap_sg(&dd->pdev->dev, cmd->sg, cmd->scatter_ents,
2728 if (unlikely(cmd->unaligned))
2729 up(&dd->port->cmd_slot_unal);
2731 blk_mq_end_request(rq, cmd->status);
2734 static void mtip_abort_cmd(struct request *req, void *data,
2737 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req);
2738 struct driver_data *dd = data;
2740 if (!blk_mq_request_started(req))
2743 dbg_printk(MTIP_DRV_NAME " Aborting request, tag = %d\n", req->tag);
2745 clear_bit(req->tag, dd->port->cmds_to_issue);
2746 cmd->status = BLK_STS_IOERR;
2747 mtip_softirq_done_fn(req);
2750 static void mtip_queue_cmd(struct request *req, void *data,
2753 struct driver_data *dd = data;
2755 if (!blk_mq_request_started(req))
2758 set_bit(req->tag, dd->port->cmds_to_issue);
2759 blk_abort_request(req);
2763 * service thread to issue queued commands
2765 * @data Pointer to the driver data structure.
2771 static int mtip_service_thread(void *data)
2773 struct driver_data *dd = (struct driver_data *)data;
2774 unsigned long slot, slot_start, slot_wrap, to;
2775 unsigned int num_cmd_slots = dd->slot_groups * 32;
2776 struct mtip_port *port = dd->port;
2779 if (kthread_should_stop() ||
2780 test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
2782 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
2785 * the condition is to check neither an internal command is
2786 * is in progress nor error handling is active
2788 wait_event_interruptible(port->svc_wait, (port->flags) &&
2789 (port->flags & MTIP_PF_SVC_THD_WORK));
2791 if (kthread_should_stop() ||
2792 test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
2795 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
2799 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
2802 /* Demux bits: start with error handling */
2803 if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) {
2804 mtip_handle_tfe(dd);
2805 clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
2808 if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags))
2811 if (test_bit(MTIP_PF_TO_ACTIVE_BIT, &port->flags)) {
2812 to = jiffies + msecs_to_jiffies(5000);
2816 } while (atomic_read(&dd->irq_workers_active) != 0 &&
2817 time_before(jiffies, to));
2819 if (atomic_read(&dd->irq_workers_active) != 0)
2820 dev_warn(&dd->pdev->dev,
2821 "Completion workers still active!");
2823 blk_mq_quiesce_queue(dd->queue);
2825 spin_lock(dd->queue->queue_lock);
2826 blk_mq_tagset_busy_iter(&dd->tags,
2827 mtip_queue_cmd, dd);
2828 spin_unlock(dd->queue->queue_lock);
2830 set_bit(MTIP_PF_ISSUE_CMDS_BIT, &dd->port->flags);
2832 if (mtip_device_reset(dd))
2833 blk_mq_tagset_busy_iter(&dd->tags,
2834 mtip_abort_cmd, dd);
2836 clear_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags);
2838 blk_mq_unquiesce_queue(dd->queue);
2841 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
2843 /* used to restrict the loop to one iteration */
2844 slot_start = num_cmd_slots;
2847 slot = find_next_bit(port->cmds_to_issue,
2848 num_cmd_slots, slot);
2849 if (slot_wrap == 1) {
2850 if ((slot_start >= slot) ||
2851 (slot >= num_cmd_slots))
2854 if (unlikely(slot_start == num_cmd_slots))
2857 if (unlikely(slot == num_cmd_slots)) {
2863 /* Issue the command to the hardware */
2864 mtip_issue_ncq_command(port, slot);
2866 clear_bit(slot, port->cmds_to_issue);
2869 clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
2872 if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) {
2873 if (mtip_ftl_rebuild_poll(dd) == 0)
2874 clear_bit(MTIP_PF_REBUILD_BIT, &port->flags);
2883 * DMA region teardown
2885 * @dd Pointer to driver_data structure
2890 static void mtip_dma_free(struct driver_data *dd)
2892 struct mtip_port *port = dd->port;
2895 dmam_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
2896 port->block1, port->block1_dma);
2898 if (port->command_list) {
2899 dmam_free_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ,
2900 port->command_list, port->command_list_dma);
2907 * @dd Pointer to driver_data structure
2910 * -ENOMEM Not enough free DMA region space to initialize driver
2912 static int mtip_dma_alloc(struct driver_data *dd)
2914 struct mtip_port *port = dd->port;
2916 /* Allocate dma memory for RX Fis, Identify, and Sector Bufffer */
2918 dmam_alloc_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
2919 &port->block1_dma, GFP_KERNEL);
2922 memset(port->block1, 0, BLOCK_DMA_ALLOC_SZ);
2924 /* Allocate dma memory for command list */
2925 port->command_list =
2926 dmam_alloc_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ,
2927 &port->command_list_dma, GFP_KERNEL);
2928 if (!port->command_list) {
2929 dmam_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
2930 port->block1, port->block1_dma);
2931 port->block1 = NULL;
2932 port->block1_dma = 0;
2935 memset(port->command_list, 0, AHCI_CMD_TBL_SZ);
2937 /* Setup all pointers into first DMA region */
2938 port->rxfis = port->block1 + AHCI_RX_FIS_OFFSET;
2939 port->rxfis_dma = port->block1_dma + AHCI_RX_FIS_OFFSET;
2940 port->identify = port->block1 + AHCI_IDFY_OFFSET;
2941 port->identify_dma = port->block1_dma + AHCI_IDFY_OFFSET;
2942 port->log_buf = port->block1 + AHCI_SECTBUF_OFFSET;
2943 port->log_buf_dma = port->block1_dma + AHCI_SECTBUF_OFFSET;
2944 port->smart_buf = port->block1 + AHCI_SMARTBUF_OFFSET;
2945 port->smart_buf_dma = port->block1_dma + AHCI_SMARTBUF_OFFSET;
2950 static int mtip_hw_get_identify(struct driver_data *dd)
2952 struct smart_attr attr242;
2956 if (mtip_get_identify(dd->port, NULL) < 0)
2959 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
2960 MTIP_FTL_REBUILD_MAGIC) {
2961 set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags);
2962 return MTIP_FTL_REBUILD_MAGIC;
2964 mtip_dump_identify(dd->port);
2966 /* check write protect, over temp and rebuild statuses */
2967 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
2969 dd->port->log_buf_dma, 1);
2971 dev_warn(&dd->pdev->dev,
2972 "Error in READ LOG EXT (10h) command\n");
2973 /* non-critical error, don't fail the load */
2975 buf = (unsigned char *)dd->port->log_buf;
2976 if (buf[259] & 0x1) {
2977 dev_info(&dd->pdev->dev,
2978 "Write protect bit is set.\n");
2979 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
2981 if (buf[288] == 0xF7) {
2982 dev_info(&dd->pdev->dev,
2983 "Exceeded Tmax, drive in thermal shutdown.\n");
2984 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
2986 if (buf[288] == 0xBF) {
2987 dev_info(&dd->pdev->dev,
2988 "Drive indicates rebuild has failed.\n");
2989 set_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag);
2993 /* get write protect progess */
2994 memset(&attr242, 0, sizeof(struct smart_attr));
2995 if (mtip_get_smart_attr(dd->port, 242, &attr242))
2996 dev_warn(&dd->pdev->dev,
2997 "Unable to check write protect progress\n");
2999 dev_info(&dd->pdev->dev,
3000 "Write protect progress: %u%% (%u blocks)\n",
3001 attr242.cur, le32_to_cpu(attr242.data));
3007 * Called once for each card.
3009 * @dd Pointer to the driver data structure.
3012 * 0 on success, else an error code.
3014 static int mtip_hw_init(struct driver_data *dd)
3018 unsigned int num_command_slots;
3019 unsigned long timeout, timetaken;
3021 dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR];
3023 mtip_detect_product(dd);
3024 if (dd->product_type == MTIP_PRODUCT_UNKNOWN) {
3028 num_command_slots = dd->slot_groups * 32;
3032 dd->port = kzalloc_node(sizeof(struct mtip_port), GFP_KERNEL,
3035 dev_err(&dd->pdev->dev,
3036 "Memory allocation: port structure\n");
3040 /* Continue workqueue setup */
3041 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
3042 dd->work[i].port = dd->port;
3044 /* Enable unaligned IO constraints for some devices */
3045 if (mtip_device_unaligned_constrained(dd))
3046 dd->unal_qdepth = MTIP_MAX_UNALIGNED_SLOTS;
3048 dd->unal_qdepth = 0;
3050 sema_init(&dd->port->cmd_slot_unal, dd->unal_qdepth);
3052 /* Spinlock to prevent concurrent issue */
3053 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
3054 spin_lock_init(&dd->port->cmd_issue_lock[i]);
3056 /* Set the port mmio base address. */
3057 dd->port->mmio = dd->mmio + PORT_OFFSET;
3060 /* DMA allocations */
3061 rv = mtip_dma_alloc(dd);
3065 /* Setup the pointers to the extended s_active and CI registers. */
3066 for (i = 0; i < dd->slot_groups; i++) {
3067 dd->port->s_active[i] =
3068 dd->port->mmio + i*0x80 + PORT_SCR_ACT;
3069 dd->port->cmd_issue[i] =
3070 dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE;
3071 dd->port->completed[i] =
3072 dd->port->mmio + i*0x80 + PORT_SDBV;
3075 timetaken = jiffies;
3076 timeout = jiffies + msecs_to_jiffies(30000);
3077 while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) &&
3078 time_before(jiffies, timeout)) {
3081 if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
3082 timetaken = jiffies - timetaken;
3083 dev_warn(&dd->pdev->dev,
3084 "Surprise removal detected at %u ms\n",
3085 jiffies_to_msecs(timetaken));
3089 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) {
3090 timetaken = jiffies - timetaken;
3091 dev_warn(&dd->pdev->dev,
3092 "Removal detected at %u ms\n",
3093 jiffies_to_msecs(timetaken));
3098 /* Conditionally reset the HBA. */
3099 if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) {
3100 if (mtip_hba_reset(dd) < 0) {
3101 dev_err(&dd->pdev->dev,
3102 "Card did not reset within timeout\n");
3107 /* Clear any pending interrupts on the HBA */
3108 writel(readl(dd->mmio + HOST_IRQ_STAT),
3109 dd->mmio + HOST_IRQ_STAT);
3112 mtip_init_port(dd->port);
3113 mtip_start_port(dd->port);
3115 /* Setup the ISR and enable interrupts. */
3116 rv = devm_request_irq(&dd->pdev->dev,
3120 dev_driver_string(&dd->pdev->dev),
3124 dev_err(&dd->pdev->dev,
3125 "Unable to allocate IRQ %d\n", dd->pdev->irq);
3128 irq_set_affinity_hint(dd->pdev->irq, get_cpu_mask(dd->isr_binding));
3130 /* Enable interrupts on the HBA. */
3131 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
3132 dd->mmio + HOST_CTL);
3134 init_waitqueue_head(&dd->port->svc_wait);
3136 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
3144 /* Disable interrupts on the HBA. */
3145 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
3146 dd->mmio + HOST_CTL);
3148 /* Release the IRQ. */
3149 irq_set_affinity_hint(dd->pdev->irq, NULL);
3150 devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
3153 mtip_deinit_port(dd->port);
3157 /* Free the memory allocated for the for structure. */
3163 static int mtip_standby_drive(struct driver_data *dd)
3167 if (dd->sr || !dd->port)
3170 * Send standby immediate (E0h) to the drive so that it
3173 if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags) &&
3174 !test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag) &&
3175 !test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)) {
3176 rv = mtip_standby_immediate(dd->port);
3178 dev_warn(&dd->pdev->dev,
3179 "STANDBY IMMEDIATE failed\n");
3185 * Called to deinitialize an interface.
3187 * @dd Pointer to the driver data structure.
3192 static int mtip_hw_exit(struct driver_data *dd)
3195 /* de-initialize the port. */
3196 mtip_deinit_port(dd->port);
3198 /* Disable interrupts on the HBA. */
3199 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
3200 dd->mmio + HOST_CTL);
3203 /* Release the IRQ. */
3204 irq_set_affinity_hint(dd->pdev->irq, NULL);
3205 devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
3208 /* Free dma regions */
3211 /* Free the memory allocated for the for structure. */
3219 * Issue a Standby Immediate command to the device.
3221 * This function is called by the Block Layer just before the
3222 * system powers off during a shutdown.
3224 * @dd Pointer to the driver data structure.
3229 static int mtip_hw_shutdown(struct driver_data *dd)
3232 * Send standby immediate (E0h) to the drive so that it
3235 mtip_standby_drive(dd);
3243 * This function is called by the Block Layer just before the
3244 * system hibernates.
3246 * @dd Pointer to the driver data structure.
3249 * 0 Suspend was successful
3250 * -EFAULT Suspend was not successful
3252 static int mtip_hw_suspend(struct driver_data *dd)
3255 * Send standby immediate (E0h) to the drive
3256 * so that it saves its state.
3258 if (mtip_standby_drive(dd) != 0) {
3259 dev_err(&dd->pdev->dev,
3260 "Failed standby-immediate command\n");
3264 /* Disable interrupts on the HBA.*/
3265 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
3266 dd->mmio + HOST_CTL);
3267 mtip_deinit_port(dd->port);
3275 * This function is called by the Block Layer as the
3278 * @dd Pointer to the driver data structure.
3281 * 0 Resume was successful
3282 * -EFAULT Resume was not successful
3284 static int mtip_hw_resume(struct driver_data *dd)
3286 /* Perform any needed hardware setup steps */
3290 if (mtip_hba_reset(dd) != 0) {
3291 dev_err(&dd->pdev->dev,
3292 "Unable to reset the HBA\n");
3297 * Enable the port, DMA engine, and FIS reception specific
3298 * h/w in controller.
3300 mtip_init_port(dd->port);
3301 mtip_start_port(dd->port);
3303 /* Enable interrupts on the HBA.*/
3304 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
3305 dd->mmio + HOST_CTL);
3311 * Helper function for reusing disk name
3312 * upon hot insertion.
3314 static int rssd_disk_name_format(char *prefix,
3319 const int base = 'z' - 'a' + 1;
3320 char *begin = buf + strlen(prefix);
3321 char *end = buf + buflen;
3331 *--p = 'a' + (index % unit);
3332 index = (index / unit) - 1;
3333 } while (index >= 0);
3335 memmove(begin, p, end - p);
3336 memcpy(buf, prefix, strlen(prefix));
3342 * Block layer IOCTL handler.
3344 * @dev Pointer to the block_device structure.
3346 * @cmd IOCTL command passed from the user application.
3347 * @arg Argument passed from the user application.
3350 * 0 IOCTL completed successfully.
3351 * -ENOTTY IOCTL not supported or invalid driver data
3352 * structure pointer.
3354 static int mtip_block_ioctl(struct block_device *dev,
3359 struct driver_data *dd = dev->bd_disk->private_data;
3361 if (!capable(CAP_SYS_ADMIN))
3367 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
3374 return mtip_hw_ioctl(dd, cmd, arg);
3378 #ifdef CONFIG_COMPAT
3380 * Block layer compat IOCTL handler.
3382 * @dev Pointer to the block_device structure.
3384 * @cmd IOCTL command passed from the user application.
3385 * @arg Argument passed from the user application.
3388 * 0 IOCTL completed successfully.
3389 * -ENOTTY IOCTL not supported or invalid driver data
3390 * structure pointer.
3392 static int mtip_block_compat_ioctl(struct block_device *dev,
3397 struct driver_data *dd = dev->bd_disk->private_data;
3399 if (!capable(CAP_SYS_ADMIN))
3405 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
3411 case HDIO_DRIVE_TASKFILE: {
3412 struct mtip_compat_ide_task_request_s __user *compat_req_task;
3413 ide_task_request_t req_task;
3414 int compat_tasksize, outtotal, ret;
3417 sizeof(struct mtip_compat_ide_task_request_s);
3420 (struct mtip_compat_ide_task_request_s __user *) arg;
3422 if (copy_from_user(&req_task, (void __user *) arg,
3423 compat_tasksize - (2 * sizeof(compat_long_t))))
3426 if (get_user(req_task.out_size, &compat_req_task->out_size))
3429 if (get_user(req_task.in_size, &compat_req_task->in_size))
3432 outtotal = sizeof(struct mtip_compat_ide_task_request_s);
3434 ret = exec_drive_taskfile(dd, (void __user *) arg,
3435 &req_task, outtotal);
3437 if (copy_to_user((void __user *) arg, &req_task,
3439 (2 * sizeof(compat_long_t))))
3442 if (put_user(req_task.out_size, &compat_req_task->out_size))
3445 if (put_user(req_task.in_size, &compat_req_task->in_size))
3451 return mtip_hw_ioctl(dd, cmd, arg);
3457 * Obtain the geometry of the device.
3459 * You may think that this function is obsolete, but some applications,
3460 * fdisk for example still used CHS values. This function describes the
3461 * device as having 224 heads and 56 sectors per cylinder. These values are
3462 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
3463 * partition is described in terms of a start and end cylinder this means
3464 * that each partition is also 4KB aligned. Non-aligned partitions adversely
3465 * affects performance.
3467 * @dev Pointer to the block_device strucutre.
3468 * @geo Pointer to a hd_geometry structure.
3471 * 0 Operation completed successfully.
3472 * -ENOTTY An error occurred while reading the drive capacity.
3474 static int mtip_block_getgeo(struct block_device *dev,
3475 struct hd_geometry *geo)
3477 struct driver_data *dd = dev->bd_disk->private_data;
3483 if (!(mtip_hw_get_capacity(dd, &capacity))) {
3484 dev_warn(&dd->pdev->dev,
3485 "Could not get drive capacity.\n");
3491 sector_div(capacity, (geo->heads * geo->sectors));
3492 geo->cylinders = capacity;
3496 static int mtip_block_open(struct block_device *dev, fmode_t mode)
3498 struct driver_data *dd;
3500 if (dev && dev->bd_disk) {
3501 dd = (struct driver_data *) dev->bd_disk->private_data;
3504 if (test_bit(MTIP_DDF_REMOVAL_BIT,
3514 static void mtip_block_release(struct gendisk *disk, fmode_t mode)
3519 * Block device operation function.
3521 * This structure contains pointers to the functions required by the block
3524 static const struct block_device_operations mtip_block_ops = {
3525 .open = mtip_block_open,
3526 .release = mtip_block_release,
3527 .ioctl = mtip_block_ioctl,
3528 #ifdef CONFIG_COMPAT
3529 .compat_ioctl = mtip_block_compat_ioctl,
3531 .getgeo = mtip_block_getgeo,
3532 .owner = THIS_MODULE
3535 static inline bool is_se_active(struct driver_data *dd)
3537 if (unlikely(test_bit(MTIP_PF_SE_ACTIVE_BIT, &dd->port->flags))) {
3538 if (dd->port->ic_pause_timer) {
3539 unsigned long to = dd->port->ic_pause_timer +
3540 msecs_to_jiffies(1000);
3541 if (time_after(jiffies, to)) {
3542 clear_bit(MTIP_PF_SE_ACTIVE_BIT,
3544 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag);
3545 dd->port->ic_pause_timer = 0;
3546 wake_up_interruptible(&dd->port->svc_wait);
3556 * Block layer make request function.
3558 * This function is called by the kernel to process a BIO for
3561 * @queue Pointer to the request queue. Unused other than to obtain
3562 * the driver data structure.
3563 * @rq Pointer to the request.
3566 static int mtip_submit_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
3568 struct driver_data *dd = hctx->queue->queuedata;
3569 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3572 if (is_se_active(dd))
3575 if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) {
3576 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
3580 if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))) {
3583 if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT,
3588 if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag) ||
3589 test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)))
3593 if (req_op(rq) == REQ_OP_DISCARD) {
3596 err = mtip_send_trim(dd, blk_rq_pos(rq), blk_rq_sectors(rq));
3597 blk_mq_end_request(rq, err ? BLK_STS_IOERR : BLK_STS_OK);
3601 /* Create the scatter list for this request. */
3602 nents = blk_rq_map_sg(hctx->queue, rq, cmd->sg);
3604 /* Issue the read/write. */
3605 mtip_hw_submit_io(dd, rq, cmd, nents, hctx);
3609 static bool mtip_check_unal_depth(struct blk_mq_hw_ctx *hctx,
3612 struct driver_data *dd = hctx->queue->queuedata;
3613 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3615 if (rq_data_dir(rq) == READ || !dd->unal_qdepth)
3619 * If unaligned depth must be limited on this controller, mark it
3620 * as unaligned if the IO isn't on a 4k boundary (start of length).
3622 if (blk_rq_sectors(rq) <= 64) {
3623 if ((blk_rq_pos(rq) & 7) || (blk_rq_sectors(rq) & 7))
3627 if (cmd->unaligned && down_trylock(&dd->port->cmd_slot_unal))
3633 static blk_status_t mtip_issue_reserved_cmd(struct blk_mq_hw_ctx *hctx,
3636 struct driver_data *dd = hctx->queue->queuedata;
3637 struct mtip_int_cmd *icmd = rq->special;
3638 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3639 struct mtip_cmd_sg *command_sg;
3641 if (mtip_commands_active(dd->port))
3642 return BLK_STS_RESOURCE;
3644 /* Populate the SG list */
3645 cmd->command_header->opts =
3646 __force_bit2int cpu_to_le32(icmd->opts | icmd->fis_len);
3647 if (icmd->buf_len) {
3648 command_sg = cmd->command + AHCI_CMD_TBL_HDR_SZ;
3651 __force_bit2int cpu_to_le32((icmd->buf_len-1) & 0x3FFFFF);
3653 __force_bit2int cpu_to_le32(icmd->buffer & 0xFFFFFFFF);
3654 command_sg->dba_upper =
3655 __force_bit2int cpu_to_le32((icmd->buffer >> 16) >> 16);
3657 cmd->command_header->opts |=
3658 __force_bit2int cpu_to_le32((1 << 16));
3661 /* Populate the command header */
3662 cmd->command_header->byte_count = 0;
3664 blk_mq_start_request(rq);
3665 mtip_issue_non_ncq_command(dd->port, rq->tag);
3669 static blk_status_t mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
3670 const struct blk_mq_queue_data *bd)
3672 struct request *rq = bd->rq;
3675 mtip_init_cmd_header(rq);
3677 if (blk_rq_is_passthrough(rq))
3678 return mtip_issue_reserved_cmd(hctx, rq);
3680 if (unlikely(mtip_check_unal_depth(hctx, rq)))
3681 return BLK_STS_RESOURCE;
3683 blk_mq_start_request(rq);
3685 ret = mtip_submit_request(hctx, rq);
3688 return BLK_STS_IOERR;
3691 static void mtip_free_cmd(struct blk_mq_tag_set *set, struct request *rq,
3692 unsigned int hctx_idx)
3694 struct driver_data *dd = set->driver_data;
3695 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3700 dmam_free_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ,
3701 cmd->command, cmd->command_dma);
3704 static int mtip_init_cmd(struct blk_mq_tag_set *set, struct request *rq,
3705 unsigned int hctx_idx, unsigned int numa_node)
3707 struct driver_data *dd = set->driver_data;
3708 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3710 cmd->command = dmam_alloc_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ,
3711 &cmd->command_dma, GFP_KERNEL);
3715 memset(cmd->command, 0, CMD_DMA_ALLOC_SZ);
3717 sg_init_table(cmd->sg, MTIP_MAX_SG);
3721 static enum blk_eh_timer_return mtip_cmd_timeout(struct request *req,
3724 struct driver_data *dd = req->q->queuedata;
3727 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(req);
3729 cmd->status = BLK_STS_TIMEOUT;
3730 return BLK_EH_HANDLED;
3733 if (test_bit(req->tag, dd->port->cmds_to_issue))
3736 if (test_and_set_bit(MTIP_PF_TO_ACTIVE_BIT, &dd->port->flags))
3739 wake_up_interruptible(&dd->port->svc_wait);
3741 return BLK_EH_RESET_TIMER;
3744 static const struct blk_mq_ops mtip_mq_ops = {
3745 .queue_rq = mtip_queue_rq,
3746 .init_request = mtip_init_cmd,
3747 .exit_request = mtip_free_cmd,
3748 .complete = mtip_softirq_done_fn,
3749 .timeout = mtip_cmd_timeout,
3753 * Block layer initialization function.
3755 * This function is called once by the PCI layer for each P320
3756 * device that is connected to the system.
3758 * @dd Pointer to the driver data structure.
3761 * 0 on success else an error code.
3763 static int mtip_block_initialize(struct driver_data *dd)
3765 int rv = 0, wait_for_rebuild = 0;
3767 unsigned int index = 0;
3768 struct kobject *kobj;
3771 goto skip_create_disk; /* hw init done, before rebuild */
3773 if (mtip_hw_init(dd)) {
3775 goto protocol_init_error;
3778 dd->disk = alloc_disk_node(MTIP_MAX_MINORS, dd->numa_node);
3779 if (dd->disk == NULL) {
3780 dev_err(&dd->pdev->dev,
3781 "Unable to allocate gendisk structure\n");
3783 goto alloc_disk_error;
3786 /* Generate the disk name, implemented same as in sd.c */
3788 if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL)) {
3793 spin_lock(&rssd_index_lock);
3794 rv = ida_get_new(&rssd_index_ida, &index);
3795 spin_unlock(&rssd_index_lock);
3796 } while (rv == -EAGAIN);
3801 rv = rssd_disk_name_format("rssd",
3803 dd->disk->disk_name,
3806 goto disk_index_error;
3808 dd->disk->major = dd->major;
3809 dd->disk->first_minor = index * MTIP_MAX_MINORS;
3810 dd->disk->minors = MTIP_MAX_MINORS;
3811 dd->disk->fops = &mtip_block_ops;
3812 dd->disk->private_data = dd;
3815 mtip_hw_debugfs_init(dd);
3817 memset(&dd->tags, 0, sizeof(dd->tags));
3818 dd->tags.ops = &mtip_mq_ops;
3819 dd->tags.nr_hw_queues = 1;
3820 dd->tags.queue_depth = MTIP_MAX_COMMAND_SLOTS;
3821 dd->tags.reserved_tags = 1;
3822 dd->tags.cmd_size = sizeof(struct mtip_cmd);
3823 dd->tags.numa_node = dd->numa_node;
3824 dd->tags.flags = BLK_MQ_F_SHOULD_MERGE;
3825 dd->tags.driver_data = dd;
3826 dd->tags.timeout = MTIP_NCQ_CMD_TIMEOUT_MS;
3828 rv = blk_mq_alloc_tag_set(&dd->tags);
3830 dev_err(&dd->pdev->dev,
3831 "Unable to allocate request queue\n");
3832 goto block_queue_alloc_tag_error;
3835 /* Allocate the request queue. */
3836 dd->queue = blk_mq_init_queue(&dd->tags);
3837 if (IS_ERR(dd->queue)) {
3838 dev_err(&dd->pdev->dev,
3839 "Unable to allocate request queue\n");
3841 goto block_queue_alloc_init_error;
3844 dd->disk->queue = dd->queue;
3845 dd->queue->queuedata = dd;
3848 /* Initialize the protocol layer. */
3849 wait_for_rebuild = mtip_hw_get_identify(dd);
3850 if (wait_for_rebuild < 0) {
3851 dev_err(&dd->pdev->dev,
3852 "Protocol layer initialization failed\n");
3854 goto init_hw_cmds_error;
3858 * if rebuild pending, start the service thread, and delay the block
3859 * queue creation and device_add_disk()
3861 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
3862 goto start_service_thread;
3864 /* Set device limits. */
3865 set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags);
3866 clear_bit(QUEUE_FLAG_ADD_RANDOM, &dd->queue->queue_flags);
3867 blk_queue_max_segments(dd->queue, MTIP_MAX_SG);
3868 blk_queue_physical_block_size(dd->queue, 4096);
3869 blk_queue_max_hw_sectors(dd->queue, 0xffff);
3870 blk_queue_max_segment_size(dd->queue, 0x400000);
3871 blk_queue_io_min(dd->queue, 4096);
3872 blk_queue_bounce_limit(dd->queue, dd->pdev->dma_mask);
3874 /* Signal trim support */
3875 if (dd->trim_supp == true) {
3876 set_bit(QUEUE_FLAG_DISCARD, &dd->queue->queue_flags);
3877 dd->queue->limits.discard_granularity = 4096;
3878 blk_queue_max_discard_sectors(dd->queue,
3879 MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES);
3882 /* Set the capacity of the device in 512 byte sectors. */
3883 if (!(mtip_hw_get_capacity(dd, &capacity))) {
3884 dev_warn(&dd->pdev->dev,
3885 "Could not read drive capacity\n");
3887 goto read_capacity_error;
3889 set_capacity(dd->disk, capacity);
3891 /* Enable the block device and add it to /dev */
3892 device_add_disk(&dd->pdev->dev, dd->disk);
3894 dd->bdev = bdget_disk(dd->disk, 0);
3896 * Now that the disk is active, initialize any sysfs attributes
3897 * managed by the protocol layer.
3899 kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
3901 mtip_hw_sysfs_init(dd, kobj);
3905 if (dd->mtip_svc_handler) {
3906 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
3907 return rv; /* service thread created for handling rebuild */
3910 start_service_thread:
3911 dd->mtip_svc_handler = kthread_create_on_node(mtip_service_thread,
3913 "mtip_svc_thd_%02d", index);
3915 if (IS_ERR(dd->mtip_svc_handler)) {
3916 dev_err(&dd->pdev->dev, "service thread failed to start\n");
3917 dd->mtip_svc_handler = NULL;
3919 goto kthread_run_error;
3921 wake_up_process(dd->mtip_svc_handler);
3922 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
3923 rv = wait_for_rebuild;
3931 /* Delete our gendisk. This also removes the device from /dev */
3932 del_gendisk(dd->disk);
3934 read_capacity_error:
3936 blk_cleanup_queue(dd->queue);
3937 block_queue_alloc_init_error:
3938 blk_mq_free_tag_set(&dd->tags);
3939 block_queue_alloc_tag_error:
3940 mtip_hw_debugfs_exit(dd);
3942 spin_lock(&rssd_index_lock);
3943 ida_remove(&rssd_index_ida, index);
3944 spin_unlock(&rssd_index_lock);
3950 mtip_hw_exit(dd); /* De-initialize the protocol layer. */
3952 protocol_init_error:
3956 static void mtip_no_dev_cleanup(struct request *rq, void *data, bool reserv)
3958 struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
3960 cmd->status = BLK_STS_IOERR;
3961 blk_mq_complete_request(rq);
3965 * Block layer deinitialization function.
3967 * Called by the PCI layer as each P320 device is removed.
3969 * @dd Pointer to the driver data structure.
3974 static int mtip_block_remove(struct driver_data *dd)
3976 struct kobject *kobj;
3978 mtip_hw_debugfs_exit(dd);
3980 if (dd->mtip_svc_handler) {
3981 set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
3982 wake_up_interruptible(&dd->port->svc_wait);
3983 kthread_stop(dd->mtip_svc_handler);
3986 /* Clean up the sysfs attributes, if created */
3987 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
3988 kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
3990 mtip_hw_sysfs_exit(dd, kobj);
3997 * Explicitly wait here for IOs to quiesce,
3998 * as mtip_standby_drive usually won't wait for IOs.
4000 if (!mtip_quiesce_io(dd->port, MTIP_QUIESCE_IO_TIMEOUT_MS))
4001 mtip_standby_drive(dd);
4004 dev_info(&dd->pdev->dev, "device %s surprise removal\n",
4005 dd->disk->disk_name);
4007 blk_freeze_queue_start(dd->queue);
4008 blk_mq_quiesce_queue(dd->queue);
4009 blk_mq_tagset_busy_iter(&dd->tags, mtip_no_dev_cleanup, dd);
4010 blk_mq_unquiesce_queue(dd->queue);
4013 * Delete our gendisk structure. This also removes the device
4021 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag))
4022 del_gendisk(dd->disk);
4023 if (dd->disk->queue) {
4024 blk_cleanup_queue(dd->queue);
4025 blk_mq_free_tag_set(&dd->tags);
4032 spin_lock(&rssd_index_lock);
4033 ida_remove(&rssd_index_ida, dd->index);
4034 spin_unlock(&rssd_index_lock);
4036 /* De-initialize the protocol layer. */
4043 * Function called by the PCI layer when just before the
4044 * machine shuts down.
4046 * If a protocol layer shutdown function is present it will be called
4049 * @dd Pointer to the driver data structure.
4054 static int mtip_block_shutdown(struct driver_data *dd)
4056 mtip_hw_shutdown(dd);
4058 /* Delete our gendisk structure, and cleanup the blk queue. */
4060 dev_info(&dd->pdev->dev,
4061 "Shutting down %s ...\n", dd->disk->disk_name);
4063 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag))
4064 del_gendisk(dd->disk);
4065 if (dd->disk->queue) {
4066 blk_cleanup_queue(dd->queue);
4067 blk_mq_free_tag_set(&dd->tags);
4074 spin_lock(&rssd_index_lock);
4075 ida_remove(&rssd_index_ida, dd->index);
4076 spin_unlock(&rssd_index_lock);
4080 static int mtip_block_suspend(struct driver_data *dd)
4082 dev_info(&dd->pdev->dev,
4083 "Suspending %s ...\n", dd->disk->disk_name);
4084 mtip_hw_suspend(dd);
4088 static int mtip_block_resume(struct driver_data *dd)
4090 dev_info(&dd->pdev->dev, "Resuming %s ...\n",
4091 dd->disk->disk_name);
4096 static void drop_cpu(int cpu)
4101 static int get_least_used_cpu_on_node(int node)
4103 int cpu, least_used_cpu, least_cnt;
4104 const struct cpumask *node_mask;
4106 node_mask = cpumask_of_node(node);
4107 least_used_cpu = cpumask_first(node_mask);
4108 least_cnt = cpu_use[least_used_cpu];
4109 cpu = least_used_cpu;
4111 for_each_cpu(cpu, node_mask) {
4112 if (cpu_use[cpu] < least_cnt) {
4113 least_used_cpu = cpu;
4114 least_cnt = cpu_use[cpu];
4117 cpu_use[least_used_cpu]++;
4118 return least_used_cpu;
4121 /* Helper for selecting a node in round robin mode */
4122 static inline int mtip_get_next_rr_node(void)
4124 static int next_node = -1;
4126 if (next_node == -1) {
4127 next_node = first_online_node;
4131 next_node = next_online_node(next_node);
4132 if (next_node == MAX_NUMNODES)
4133 next_node = first_online_node;
4137 static DEFINE_HANDLER(0);
4138 static DEFINE_HANDLER(1);
4139 static DEFINE_HANDLER(2);
4140 static DEFINE_HANDLER(3);
4141 static DEFINE_HANDLER(4);
4142 static DEFINE_HANDLER(5);
4143 static DEFINE_HANDLER(6);
4144 static DEFINE_HANDLER(7);
4146 static void mtip_disable_link_opts(struct driver_data *dd, struct pci_dev *pdev)
4149 unsigned short pcie_dev_ctrl;
4151 pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
4153 pci_read_config_word(pdev,
4154 pos + PCI_EXP_DEVCTL,
4156 if (pcie_dev_ctrl & (1 << 11) ||
4157 pcie_dev_ctrl & (1 << 4)) {
4158 dev_info(&dd->pdev->dev,
4159 "Disabling ERO/No-Snoop on bridge device %04x:%04x\n",
4160 pdev->vendor, pdev->device);
4161 pcie_dev_ctrl &= ~(PCI_EXP_DEVCTL_NOSNOOP_EN |
4162 PCI_EXP_DEVCTL_RELAX_EN);
4163 pci_write_config_word(pdev,
4164 pos + PCI_EXP_DEVCTL,
4170 static void mtip_fix_ero_nosnoop(struct driver_data *dd, struct pci_dev *pdev)
4173 * This workaround is specific to AMD/ATI chipset with a PCI upstream
4174 * device with device id 0x5aXX
4176 if (pdev->bus && pdev->bus->self) {
4177 if (pdev->bus->self->vendor == PCI_VENDOR_ID_ATI &&
4178 ((pdev->bus->self->device & 0xff00) == 0x5a00)) {
4179 mtip_disable_link_opts(dd, pdev->bus->self);
4181 /* Check further up the topology */
4182 struct pci_dev *parent_dev = pdev->bus->self;
4183 if (parent_dev->bus &&
4184 parent_dev->bus->parent &&
4185 parent_dev->bus->parent->self &&
4186 parent_dev->bus->parent->self->vendor ==
4187 PCI_VENDOR_ID_ATI &&
4188 (parent_dev->bus->parent->self->device &
4189 0xff00) == 0x5a00) {
4190 mtip_disable_link_opts(dd,
4191 parent_dev->bus->parent->self);
4198 * Called for each supported PCI device detected.
4200 * This function allocates the private data structure, enables the
4201 * PCI device and then calls the block layer initialization function.
4204 * 0 on success else an error code.
4206 static int mtip_pci_probe(struct pci_dev *pdev,
4207 const struct pci_device_id *ent)
4210 struct driver_data *dd = NULL;
4212 const struct cpumask *node_mask;
4213 int cpu, i = 0, j = 0;
4214 int my_node = NUMA_NO_NODE;
4215 unsigned long flags;
4217 /* Allocate memory for this devices private data. */
4218 my_node = pcibus_to_node(pdev->bus);
4219 if (my_node != NUMA_NO_NODE) {
4220 if (!node_online(my_node))
4221 my_node = mtip_get_next_rr_node();
4223 dev_info(&pdev->dev, "Kernel not reporting proximity, choosing a node\n");
4224 my_node = mtip_get_next_rr_node();
4226 dev_info(&pdev->dev, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n",
4227 my_node, pcibus_to_node(pdev->bus), dev_to_node(&pdev->dev),
4228 cpu_to_node(raw_smp_processor_id()), raw_smp_processor_id());
4230 dd = kzalloc_node(sizeof(struct driver_data), GFP_KERNEL, my_node);
4233 "Unable to allocate memory for driver data\n");
4237 /* Attach the private data to this PCI device. */
4238 pci_set_drvdata(pdev, dd);
4240 rv = pcim_enable_device(pdev);
4242 dev_err(&pdev->dev, "Unable to enable device\n");
4246 /* Map BAR5 to memory. */
4247 rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME);
4249 dev_err(&pdev->dev, "Unable to map regions\n");
4253 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
4254 rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
4257 rv = pci_set_consistent_dma_mask(pdev,
4260 dev_warn(&pdev->dev,
4261 "64-bit DMA enable failed\n");
4267 /* Copy the info we may need later into the private data structure. */
4268 dd->major = mtip_major;
4269 dd->instance = instance;
4271 dd->numa_node = my_node;
4273 INIT_LIST_HEAD(&dd->online_list);
4274 INIT_LIST_HEAD(&dd->remove_list);
4276 memset(dd->workq_name, 0, 32);
4277 snprintf(dd->workq_name, 31, "mtipq%d", dd->instance);
4279 dd->isr_workq = create_workqueue(dd->workq_name);
4280 if (!dd->isr_workq) {
4281 dev_warn(&pdev->dev, "Can't create wq %d\n", dd->instance);
4283 goto block_initialize_err;
4286 memset(cpu_list, 0, sizeof(cpu_list));
4288 node_mask = cpumask_of_node(dd->numa_node);
4289 if (!cpumask_empty(node_mask)) {
4290 for_each_cpu(cpu, node_mask)
4292 snprintf(&cpu_list[j], 256 - j, "%d ", cpu);
4293 j = strlen(cpu_list);
4296 dev_info(&pdev->dev, "Node %d on package %d has %d cpu(s): %s\n",
4298 topology_physical_package_id(cpumask_first(node_mask)),
4299 nr_cpus_node(dd->numa_node),
4302 dev_dbg(&pdev->dev, "mtip32xx: node_mask empty\n");
4304 dd->isr_binding = get_least_used_cpu_on_node(dd->numa_node);
4305 dev_info(&pdev->dev, "Initial IRQ binding node:cpu %d:%d\n",
4306 cpu_to_node(dd->isr_binding), dd->isr_binding);
4308 /* first worker context always runs in ISR */
4309 dd->work[0].cpu_binding = dd->isr_binding;
4310 dd->work[1].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
4311 dd->work[2].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
4312 dd->work[3].cpu_binding = dd->work[0].cpu_binding;
4313 dd->work[4].cpu_binding = dd->work[1].cpu_binding;
4314 dd->work[5].cpu_binding = dd->work[2].cpu_binding;
4315 dd->work[6].cpu_binding = dd->work[2].cpu_binding;
4316 dd->work[7].cpu_binding = dd->work[1].cpu_binding;
4318 /* Log the bindings */
4319 for_each_present_cpu(cpu) {
4320 memset(cpu_list, 0, sizeof(cpu_list));
4321 for (i = 0, j = 0; i < MTIP_MAX_SLOT_GROUPS; i++) {
4322 if (dd->work[i].cpu_binding == cpu) {
4323 snprintf(&cpu_list[j], 256 - j, "%d ", i);
4324 j = strlen(cpu_list);
4328 dev_info(&pdev->dev, "CPU %d: WQs %s\n", cpu, cpu_list);
4331 INIT_WORK(&dd->work[0].work, mtip_workq_sdbf0);
4332 INIT_WORK(&dd->work[1].work, mtip_workq_sdbf1);
4333 INIT_WORK(&dd->work[2].work, mtip_workq_sdbf2);
4334 INIT_WORK(&dd->work[3].work, mtip_workq_sdbf3);
4335 INIT_WORK(&dd->work[4].work, mtip_workq_sdbf4);
4336 INIT_WORK(&dd->work[5].work, mtip_workq_sdbf5);
4337 INIT_WORK(&dd->work[6].work, mtip_workq_sdbf6);
4338 INIT_WORK(&dd->work[7].work, mtip_workq_sdbf7);
4340 pci_set_master(pdev);
4341 rv = pci_enable_msi(pdev);
4343 dev_warn(&pdev->dev,
4344 "Unable to enable MSI interrupt.\n");
4345 goto msi_initialize_err;
4348 mtip_fix_ero_nosnoop(dd, pdev);
4350 /* Initialize the block layer. */
4351 rv = mtip_block_initialize(dd);
4354 "Unable to initialize block layer\n");
4355 goto block_initialize_err;
4359 * Increment the instance count so that each device has a unique
4363 if (rv != MTIP_FTL_REBUILD_MAGIC)
4364 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
4366 rv = 0; /* device in rebuild state, return 0 from probe */
4368 /* Add to online list even if in ftl rebuild */
4369 spin_lock_irqsave(&dev_lock, flags);
4370 list_add(&dd->online_list, &online_list);
4371 spin_unlock_irqrestore(&dev_lock, flags);
4375 block_initialize_err:
4376 pci_disable_msi(pdev);
4379 if (dd->isr_workq) {
4380 flush_workqueue(dd->isr_workq);
4381 destroy_workqueue(dd->isr_workq);
4382 drop_cpu(dd->work[0].cpu_binding);
4383 drop_cpu(dd->work[1].cpu_binding);
4384 drop_cpu(dd->work[2].cpu_binding);
4387 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
4391 pci_set_drvdata(pdev, NULL);
4398 * Called for each probed device when the device is removed or the
4399 * driver is unloaded.
4404 static void mtip_pci_remove(struct pci_dev *pdev)
4406 struct driver_data *dd = pci_get_drvdata(pdev);
4407 unsigned long flags, to;
4409 set_bit(MTIP_DDF_REMOVAL_BIT, &dd->dd_flag);
4411 spin_lock_irqsave(&dev_lock, flags);
4412 list_del_init(&dd->online_list);
4413 list_add(&dd->remove_list, &removing_list);
4414 spin_unlock_irqrestore(&dev_lock, flags);
4416 mtip_check_surprise_removal(pdev);
4417 synchronize_irq(dd->pdev->irq);
4419 /* Spin until workers are done */
4420 to = jiffies + msecs_to_jiffies(4000);
4423 } while (atomic_read(&dd->irq_workers_active) != 0 &&
4424 time_before(jiffies, to));
4427 fsync_bdev(dd->bdev);
4429 if (atomic_read(&dd->irq_workers_active) != 0) {
4430 dev_warn(&dd->pdev->dev,
4431 "Completion workers still active!\n");
4434 blk_set_queue_dying(dd->queue);
4435 set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
4437 /* Clean up the block layer. */
4438 mtip_block_remove(dd);
4440 if (dd->isr_workq) {
4441 flush_workqueue(dd->isr_workq);
4442 destroy_workqueue(dd->isr_workq);
4443 drop_cpu(dd->work[0].cpu_binding);
4444 drop_cpu(dd->work[1].cpu_binding);
4445 drop_cpu(dd->work[2].cpu_binding);
4448 pci_disable_msi(pdev);
4450 spin_lock_irqsave(&dev_lock, flags);
4451 list_del_init(&dd->remove_list);
4452 spin_unlock_irqrestore(&dev_lock, flags);
4456 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
4457 pci_set_drvdata(pdev, NULL);
4461 * Called for each probed device when the device is suspended.
4467 static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
4470 struct driver_data *dd = pci_get_drvdata(pdev);
4474 "Driver private datastructure is NULL\n");
4478 set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
4480 /* Disable ports & interrupts then send standby immediate */
4481 rv = mtip_block_suspend(dd);
4484 "Failed to suspend controller\n");
4489 * Save the pci config space to pdev structure &
4490 * disable the device
4492 pci_save_state(pdev);
4493 pci_disable_device(pdev);
4495 /* Move to Low power state*/
4496 pci_set_power_state(pdev, PCI_D3hot);
4502 * Called for each probed device when the device is resumed.
4508 static int mtip_pci_resume(struct pci_dev *pdev)
4511 struct driver_data *dd;
4513 dd = pci_get_drvdata(pdev);
4516 "Driver private datastructure is NULL\n");
4520 /* Move the device to active State */
4521 pci_set_power_state(pdev, PCI_D0);
4523 /* Restore PCI configuration space */
4524 pci_restore_state(pdev);
4526 /* Enable the PCI device*/
4527 rv = pcim_enable_device(pdev);
4530 "Failed to enable card during resume\n");
4533 pci_set_master(pdev);
4536 * Calls hbaReset, initPort, & startPort function
4537 * then enables interrupts
4539 rv = mtip_block_resume(dd);
4541 dev_err(&pdev->dev, "Unable to resume\n");
4544 clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
4555 static void mtip_pci_shutdown(struct pci_dev *pdev)
4557 struct driver_data *dd = pci_get_drvdata(pdev);
4559 mtip_block_shutdown(dd);
4562 /* Table of device ids supported by this driver. */
4563 static const struct pci_device_id mtip_pci_tbl[] = {
4564 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320H_DEVICE_ID) },
4565 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320M_DEVICE_ID) },
4566 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320S_DEVICE_ID) },
4567 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P325M_DEVICE_ID) },
4568 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420H_DEVICE_ID) },
4569 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420M_DEVICE_ID) },
4570 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P425M_DEVICE_ID) },
4574 /* Structure that describes the PCI driver functions. */
4575 static struct pci_driver mtip_pci_driver = {
4576 .name = MTIP_DRV_NAME,
4577 .id_table = mtip_pci_tbl,
4578 .probe = mtip_pci_probe,
4579 .remove = mtip_pci_remove,
4580 .suspend = mtip_pci_suspend,
4581 .resume = mtip_pci_resume,
4582 .shutdown = mtip_pci_shutdown,
4585 MODULE_DEVICE_TABLE(pci, mtip_pci_tbl);
4588 * Module initialization function.
4590 * Called once when the module is loaded. This function allocates a major
4591 * block device number to the Cyclone devices and registers the PCI layer
4595 * 0 on success else error code.
4597 static int __init mtip_init(void)
4601 pr_info(MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n");
4603 spin_lock_init(&dev_lock);
4605 INIT_LIST_HEAD(&online_list);
4606 INIT_LIST_HEAD(&removing_list);
4608 /* Allocate a major block device number to use with this driver. */
4609 error = register_blkdev(0, MTIP_DRV_NAME);
4611 pr_err("Unable to register block device (%d)\n",
4617 dfs_parent = debugfs_create_dir("rssd", NULL);
4618 if (IS_ERR_OR_NULL(dfs_parent)) {
4619 pr_warn("Error creating debugfs parent\n");
4623 dfs_device_status = debugfs_create_file("device_status",
4624 S_IRUGO, dfs_parent, NULL,
4625 &mtip_device_status_fops);
4626 if (IS_ERR_OR_NULL(dfs_device_status)) {
4627 pr_err("Error creating device_status node\n");
4628 dfs_device_status = NULL;
4632 /* Register our PCI operations. */
4633 error = pci_register_driver(&mtip_pci_driver);
4635 debugfs_remove(dfs_parent);
4636 unregister_blkdev(mtip_major, MTIP_DRV_NAME);
4643 * Module de-initialization function.
4645 * Called once when the module is unloaded. This function deallocates
4646 * the major block device number allocated by mtip_init() and
4647 * unregisters the PCI layer of the driver.
4652 static void __exit mtip_exit(void)
4654 /* Release the allocated major block device number. */
4655 unregister_blkdev(mtip_major, MTIP_DRV_NAME);
4657 /* Unregister the PCI driver. */
4658 pci_unregister_driver(&mtip_pci_driver);
4660 debugfs_remove_recursive(dfs_parent);
4663 MODULE_AUTHOR("Micron Technology, Inc");
4664 MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
4665 MODULE_LICENSE("GPL");
4666 MODULE_VERSION(MTIP_DRV_VERSION);
4668 module_init(mtip_init);
4669 module_exit(mtip_exit);