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linux-next/drivers/block/mtip32xx/mtip32xx.c
Jens Axboe 74c450521d blk-mq: add a 'list' parameter to ->queue_rq() 
Since we have the notion of a 'last' request in a chain, we can use
this to have the hardware optimize the issuing of requests. Add
a list_head parameter to queue_rq that the driver can use to
temporarily store hw commands for issue when 'last' is true. If we
are doing a chain of requests, pass in a NULL list for the first
request to force issue of that immediately, then batch the remainder
for deferred issue until the last request has been sent.

Instead of adding yet another argument to the hot ->queue_rq path,
encapsulate the passed arguments in a blk_mq_queue_data structure.
This is passed as a constant, and has been tested as faster than
passing 4 (or even 3) args through ->queue_rq. Update drivers for
the new ->queue_rq() prototype. There are no functional changes
in this patch for drivers - if they don't use the passed in list,
then they will just queue requests individually like before.

Signed-off-by: Jens Axboe <axboe@fb.com>
2014-10-29 11:14:52 -06:00

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/*
* Driver for the Micron P320 SSD
* Copyright (C) 2011 Micron Technology, Inc.
*
* Portions of this code were derived from works subjected to the
* following copyright:
* Copyright (C) 2009 Integrated Device Technology, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/ata.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
#include <linux/uaccess.h>
#include <linux/random.h>
#include <linux/smp.h>
#include <linux/compat.h>
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/genhd.h>
#include <linux/blkdev.h>
#include <linux/blk-mq.h>
#include <linux/bio.h>
#include <linux/dma-mapping.h>
#include <linux/idr.h>
#include <linux/kthread.h>
#include <../drivers/ata/ahci.h>
#include <linux/export.h>
#include <linux/debugfs.h>
#include <linux/prefetch.h>
#include "mtip32xx.h"
#define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
/* DMA region containing RX Fis, Identify, RLE10, and SMART buffers */
#define AHCI_RX_FIS_SZ 0x100
#define AHCI_RX_FIS_OFFSET 0x0
#define AHCI_IDFY_SZ ATA_SECT_SIZE
#define AHCI_IDFY_OFFSET 0x400
#define AHCI_SECTBUF_SZ ATA_SECT_SIZE
#define AHCI_SECTBUF_OFFSET 0x800
#define AHCI_SMARTBUF_SZ ATA_SECT_SIZE
#define AHCI_SMARTBUF_OFFSET 0xC00
/* 0x100 + 0x200 + 0x200 + 0x200 is smaller than 4k but we pad it out */
#define BLOCK_DMA_ALLOC_SZ 4096
/* DMA region containing command table (should be 8192 bytes) */
#define AHCI_CMD_SLOT_SZ sizeof(struct mtip_cmd_hdr)
#define AHCI_CMD_TBL_SZ (MTIP_MAX_COMMAND_SLOTS * AHCI_CMD_SLOT_SZ)
#define AHCI_CMD_TBL_OFFSET 0x0
/* DMA region per command (contains header and SGL) */
#define AHCI_CMD_TBL_HDR_SZ 0x80
#define AHCI_CMD_TBL_HDR_OFFSET 0x0
#define AHCI_CMD_TBL_SGL_SZ (MTIP_MAX_SG * sizeof(struct mtip_cmd_sg))
#define AHCI_CMD_TBL_SGL_OFFSET AHCI_CMD_TBL_HDR_SZ
#define CMD_DMA_ALLOC_SZ (AHCI_CMD_TBL_SGL_SZ + AHCI_CMD_TBL_HDR_SZ)
#define HOST_CAP_NZDMA (1 << 19)
#define HOST_HSORG 0xFC
#define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
#define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
#define HSORG_HWREV 0xFF00
#define HSORG_STYLE 0x8
#define HSORG_SLOTGROUPS 0x7
#define PORT_COMMAND_ISSUE 0x38
#define PORT_SDBV 0x7C
#define PORT_OFFSET 0x100
#define PORT_MEM_SIZE 0x80
#define PORT_IRQ_ERR \
(PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
PORT_IRQ_OVERFLOW)
#define PORT_IRQ_LEGACY \
(PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
#define PORT_IRQ_HANDLED \
(PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
#define DEF_PORT_IRQ \
(PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
/* product numbers */
#define MTIP_PRODUCT_UNKNOWN 0x00
#define MTIP_PRODUCT_ASICFPGA 0x11
/* Device instance number, incremented each time a device is probed. */
static int instance;
struct list_head online_list;
struct list_head removing_list;
spinlock_t dev_lock;
/*
* Global variable used to hold the major block device number
* allocated in mtip_init().
*/
static int mtip_major;
static struct dentry *dfs_parent;
static struct dentry *dfs_device_status;
static u32 cpu_use[NR_CPUS];
static DEFINE_SPINLOCK(rssd_index_lock);
static DEFINE_IDA(rssd_index_ida);
static int mtip_block_initialize(struct driver_data *dd);
#ifdef CONFIG_COMPAT
struct mtip_compat_ide_task_request_s {
__u8 io_ports[8];
__u8 hob_ports[8];
ide_reg_valid_t out_flags;
ide_reg_valid_t in_flags;
int data_phase;
int req_cmd;
compat_ulong_t out_size;
compat_ulong_t in_size;
};
#endif
/*
* This function check_for_surprise_removal is called
* while card is removed from the system and it will
* read the vendor id from the configration space
*
* @pdev Pointer to the pci_dev structure.
*
* return value
* true if device removed, else false
*/
static bool mtip_check_surprise_removal(struct pci_dev *pdev)
{
u16 vendor_id = 0;
struct driver_data *dd = pci_get_drvdata(pdev);
if (dd->sr)
return true;
/* Read the vendorID from the configuration space */
pci_read_config_word(pdev, 0x00, &vendor_id);
if (vendor_id == 0xFFFF) {
dd->sr = true;
if (dd->queue)
set_bit(QUEUE_FLAG_DEAD, &dd->queue->queue_flags);
else
dev_warn(&dd->pdev->dev,
"%s: dd->queue is NULL\n", __func__);
if (dd->port) {
set_bit(MTIP_PF_SR_CLEANUP_BIT, &dd->port->flags);
wake_up_interruptible(&dd->port->svc_wait);
} else
dev_warn(&dd->pdev->dev,
"%s: dd->port is NULL\n", __func__);
return true; /* device removed */
}
return false; /* device present */
}
static struct mtip_cmd *mtip_get_int_command(struct driver_data *dd)
{
struct request *rq;
rq = blk_mq_alloc_request(dd->queue, 0, __GFP_WAIT, true);
return blk_mq_rq_to_pdu(rq);
}
static void mtip_put_int_command(struct driver_data *dd, struct mtip_cmd *cmd)
{
blk_put_request(blk_mq_rq_from_pdu(cmd));
}
/*
* Once we add support for one hctx per mtip group, this will change a bit
*/
static struct request *mtip_rq_from_tag(struct driver_data *dd,
unsigned int tag)
{
struct blk_mq_hw_ctx *hctx = dd->queue->queue_hw_ctx[0];
return blk_mq_tag_to_rq(hctx->tags, tag);
}
static struct mtip_cmd *mtip_cmd_from_tag(struct driver_data *dd,
unsigned int tag)
{
struct request *rq = mtip_rq_from_tag(dd, tag);
return blk_mq_rq_to_pdu(rq);
}
/*
* IO completion function.
*
* This completion function is called by the driver ISR when a
* command that was issued by the kernel completes. It first calls the
* asynchronous completion function which normally calls back into the block
* layer passing the asynchronous callback data, then unmaps the
* scatter list associated with the completed command, and finally
* clears the allocated bit associated with the completed command.
*
* @port Pointer to the port data structure.
* @tag Tag of the command.
* @data Pointer to driver_data.
* @status Completion status.
*
* return value
* None
*/
static void mtip_async_complete(struct mtip_port *port,
int tag, struct mtip_cmd *cmd, int status)
{
struct driver_data *dd = port->dd;
struct request *rq;
if (unlikely(!dd) || unlikely(!port))
return;
if (unlikely(status == PORT_IRQ_TF_ERR)) {
dev_warn(&port->dd->pdev->dev,
"Command tag %d failed due to TFE\n", tag);
}
/* Unmap the DMA scatter list entries */
dma_unmap_sg(&dd->pdev->dev, cmd->sg, cmd->scatter_ents, cmd->direction);
rq = mtip_rq_from_tag(dd, tag);
if (unlikely(cmd->unaligned))
up(&port->cmd_slot_unal);
blk_mq_end_request(rq, status ? -EIO : 0);
}
/*
* Reset the HBA (without sleeping)
*
* @dd Pointer to the driver data structure.
*
* return value
* 0 The reset was successful.
* -1 The HBA Reset bit did not clear.
*/
static int mtip_hba_reset(struct driver_data *dd)
{
unsigned long timeout;
/* Set the reset bit */
writel(HOST_RESET, dd->mmio + HOST_CTL);
/* Flush */
readl(dd->mmio + HOST_CTL);
/* Spin for up to 2 seconds, waiting for reset acknowledgement */
timeout = jiffies + msecs_to_jiffies(2000);
do {
mdelay(10);
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))
return -1;
} while ((readl(dd->mmio + HOST_CTL) & HOST_RESET)
&& time_before(jiffies, timeout));
if (readl(dd->mmio + HOST_CTL) & HOST_RESET)
return -1;
return 0;
}
/*
* Issue a command to the hardware.
*
* Set the appropriate bit in the s_active and Command Issue hardware
* registers, causing hardware command processing to begin.
*
* @port Pointer to the port structure.
* @tag The tag of the command to be issued.
*
* return value
* None
*/
static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag)
{
int group = tag >> 5;
/* guard SACT and CI registers */
spin_lock(&port->cmd_issue_lock[group]);
writel((1 << MTIP_TAG_BIT(tag)),
port->s_active[MTIP_TAG_INDEX(tag)]);
writel((1 << MTIP_TAG_BIT(tag)),
port->cmd_issue[MTIP_TAG_INDEX(tag)]);
spin_unlock(&port->cmd_issue_lock[group]);
}
/*
* Enable/disable the reception of FIS
*
* @port Pointer to the port data structure
* @enable 1 to enable, 0 to disable
*
* return value
* Previous state: 1 enabled, 0 disabled
*/
static int mtip_enable_fis(struct mtip_port *port, int enable)
{
u32 tmp;
/* enable FIS reception */
tmp = readl(port->mmio + PORT_CMD);
if (enable)
writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
else
writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
/* Flush */
readl(port->mmio + PORT_CMD);
return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX));
}
/*
* Enable/disable the DMA engine
*
* @port Pointer to the port data structure
* @enable 1 to enable, 0 to disable
*
* return value
* Previous state: 1 enabled, 0 disabled.
*/
static int mtip_enable_engine(struct mtip_port *port, int enable)
{
u32 tmp;
/* enable FIS reception */
tmp = readl(port->mmio + PORT_CMD);
if (enable)
writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD);
else
writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD);
readl(port->mmio + PORT_CMD);
return (((tmp & PORT_CMD_START) == PORT_CMD_START));
}
/*
* Enables the port DMA engine and FIS reception.
*
* return value
* None
*/
static inline void mtip_start_port(struct mtip_port *port)
{
/* Enable FIS reception */
mtip_enable_fis(port, 1);
/* Enable the DMA engine */
mtip_enable_engine(port, 1);
}
/*
* Deinitialize a port by disabling port interrupts, the DMA engine,
* and FIS reception.
*
* @port Pointer to the port structure
*
* return value
* None
*/
static inline void mtip_deinit_port(struct mtip_port *port)
{
/* Disable interrupts on this port */
writel(0, port->mmio + PORT_IRQ_MASK);
/* Disable the DMA engine */
mtip_enable_engine(port, 0);
/* Disable FIS reception */
mtip_enable_fis(port, 0);
}
/*
* Initialize a port.
*
* This function deinitializes the port by calling mtip_deinit_port() and
* then initializes it by setting the command header and RX FIS addresses,
* clearing the SError register and any pending port interrupts before
* re-enabling the default set of port interrupts.
*
* @port Pointer to the port structure.
*
* return value
* None
*/
static void mtip_init_port(struct mtip_port *port)
{
int i;
mtip_deinit_port(port);
/* Program the command list base and FIS base addresses */
if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) {
writel((port->command_list_dma >> 16) >> 16,
port->mmio + PORT_LST_ADDR_HI);
writel((port->rxfis_dma >> 16) >> 16,
port->mmio + PORT_FIS_ADDR_HI);
}
writel(port->command_list_dma & 0xFFFFFFFF,
port->mmio + PORT_LST_ADDR);
writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR);
/* Clear SError */
writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR);
/* reset the completed registers.*/
for (i = 0; i < port->dd->slot_groups; i++)
writel(0xFFFFFFFF, port->completed[i]);
/* Clear any pending interrupts for this port */
writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT);
/* Clear any pending interrupts on the HBA. */
writel(readl(port->dd->mmio + HOST_IRQ_STAT),
port->dd->mmio + HOST_IRQ_STAT);
/* Enable port interrupts */
writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK);
}
/*
* Restart a port
*
* @port Pointer to the port data structure.
*
* return value
* None
*/
static void mtip_restart_port(struct mtip_port *port)
{
unsigned long timeout;
/* Disable the DMA engine */
mtip_enable_engine(port, 0);
/* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
timeout = jiffies + msecs_to_jiffies(500);
while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON)
&& time_before(jiffies, timeout))
;
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
return;
/*
* Chip quirk: escalate to hba reset if
* PxCMD.CR not clear after 500 ms
*/
if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) {
dev_warn(&port->dd->pdev->dev,
"PxCMD.CR not clear, escalating reset\n");
if (mtip_hba_reset(port->dd))
dev_err(&port->dd->pdev->dev,
"HBA reset escalation failed.\n");
/* 30 ms delay before com reset to quiesce chip */
mdelay(30);
}
dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n");
/* Set PxSCTL.DET */
writel(readl(port->mmio + PORT_SCR_CTL) |
1, port->mmio + PORT_SCR_CTL);
readl(port->mmio + PORT_SCR_CTL);
/* Wait 1 ms to quiesce chip function */
timeout = jiffies + msecs_to_jiffies(1);
while (time_before(jiffies, timeout))
;
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
return;
/* Clear PxSCTL.DET */
writel(readl(port->mmio + PORT_SCR_CTL) & ~1,
port->mmio + PORT_SCR_CTL);
readl(port->mmio + PORT_SCR_CTL);
/* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
timeout = jiffies + msecs_to_jiffies(500);
while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
&& time_before(jiffies, timeout))
;
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
return;
if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
dev_warn(&port->dd->pdev->dev,
"COM reset failed\n");
mtip_init_port(port);
mtip_start_port(port);
}
static int mtip_device_reset(struct driver_data *dd)
{
int rv = 0;
if (mtip_check_surprise_removal(dd->pdev))
return 0;
if (mtip_hba_reset(dd) < 0)
rv = -EFAULT;
mdelay(1);
mtip_init_port(dd->port);
mtip_start_port(dd->port);
/* Enable interrupts on the HBA. */
writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
dd->mmio + HOST_CTL);
return rv;
}
/*
* Helper function for tag logging
*/
static void print_tags(struct driver_data *dd,
char *msg,
unsigned long *tagbits,
int cnt)
{
unsigned char tagmap[128];
int group, tagmap_len = 0;
memset(tagmap, 0, sizeof(tagmap));
for (group = SLOTBITS_IN_LONGS; group > 0; group--)
tagmap_len += sprintf(tagmap + tagmap_len, "%016lX ",
tagbits[group-1]);
dev_warn(&dd->pdev->dev,
"%d command(s) %s: tagmap [%s]", cnt, msg, tagmap);
}
/*
* Internal command completion callback function.
*
* This function is normally called by the driver ISR when an internal
* command completed. This function signals the command completion by
* calling complete().
*
* @port Pointer to the port data structure.
* @tag Tag of the command that has completed.
* @data Pointer to a completion structure.
* @status Completion status.
*
* return value
* None
*/
static void mtip_completion(struct mtip_port *port,
int tag, struct mtip_cmd *command, int status)
{
struct completion *waiting = command->comp_data;
if (unlikely(status == PORT_IRQ_TF_ERR))
dev_warn(&port->dd->pdev->dev,
"Internal command %d completed with TFE\n", tag);
complete(waiting);
}
static void mtip_null_completion(struct mtip_port *port,
int tag, struct mtip_cmd *command, int status)
{
}
static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
dma_addr_t buffer_dma, unsigned int sectors);
static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
struct smart_attr *attrib);
/*
* Handle an error.
*
* @dd Pointer to the DRIVER_DATA structure.
*
* return value
* None
*/
static void mtip_handle_tfe(struct driver_data *dd)
{
int group, tag, bit, reissue, rv;
struct mtip_port *port;
struct mtip_cmd *cmd;
u32 completed;
struct host_to_dev_fis *fis;
unsigned long tagaccum[SLOTBITS_IN_LONGS];
unsigned int cmd_cnt = 0;
unsigned char *buf;
char *fail_reason = NULL;
int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0;
dev_warn(&dd->pdev->dev, "Taskfile error\n");
port = dd->port;
set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) &&
test_bit(MTIP_TAG_INTERNAL, port->allocated)) {
cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n");
if (cmd->comp_data && cmd->comp_func) {
cmd->comp_func(port, MTIP_TAG_INTERNAL,
cmd, PORT_IRQ_TF_ERR);
}
goto handle_tfe_exit;
}
/* clear the tag accumulator */
memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
/* Loop through all the groups */
for (group = 0; group < dd->slot_groups; group++) {
completed = readl(port->completed[group]);
dev_warn(&dd->pdev->dev, "g=%u, comp=%x\n", group, completed);
/* clear completed status register in the hardware.*/
writel(completed, port->completed[group]);
/* Process successfully completed commands */
for (bit = 0; bit < 32 && completed; bit++) {
if (!(completed & (1<<bit)))
continue;
tag = (group << 5) + bit;
/* Skip the internal command slot */
if (tag == MTIP_TAG_INTERNAL)
continue;
cmd = mtip_cmd_from_tag(dd, tag);
if (likely(cmd->comp_func)) {
set_bit(tag, tagaccum);
cmd_cnt++;
cmd->comp_func(port, tag, cmd, 0);
} else {
dev_err(&port->dd->pdev->dev,
"Missing completion func for tag %d",
tag);
if (mtip_check_surprise_removal(dd->pdev)) {
/* don't proceed further */
return;
}
}
}
}
print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt);
/* Restart the port */
mdelay(20);
mtip_restart_port(port);
/* Trying to determine the cause of the error */
rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
dd->port->log_buf,
dd->port->log_buf_dma, 1);
if (rv) {
dev_warn(&dd->pdev->dev,
"Error in READ LOG EXT (10h) command\n");
/* non-critical error, don't fail the load */
} else {
buf = (unsigned char *)dd->port->log_buf;
if (buf[259] & 0x1) {
dev_info(&dd->pdev->dev,
"Write protect bit is set.\n");
set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
fail_all_ncq_write = 1;
fail_reason = "write protect";
}
if (buf[288] == 0xF7) {
dev_info(&dd->pdev->dev,
"Exceeded Tmax, drive in thermal shutdown.\n");
set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
fail_all_ncq_cmds = 1;
fail_reason = "thermal shutdown";
}
if (buf[288] == 0xBF) {
set_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag);
dev_info(&dd->pdev->dev,
"Drive indicates rebuild has failed. Secure erase required.\n");
fail_all_ncq_cmds = 1;
fail_reason = "rebuild failed";
}
}
/* clear the tag accumulator */
memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
/* Loop through all the groups */
for (group = 0; group < dd->slot_groups; group++) {
for (bit = 0; bit < 32; bit++) {
reissue = 1;
tag = (group << 5) + bit;
cmd = mtip_cmd_from_tag(dd, tag);
fis = (struct host_to_dev_fis *)cmd->command;
/* Should re-issue? */
if (tag == MTIP_TAG_INTERNAL ||
fis->command == ATA_CMD_SET_FEATURES)
reissue = 0;
else {
if (fail_all_ncq_cmds ||
(fail_all_ncq_write &&
fis->command == ATA_CMD_FPDMA_WRITE)) {
dev_warn(&dd->pdev->dev,
" Fail: %s w/tag %d [%s].\n",
fis->command == ATA_CMD_FPDMA_WRITE ?
"write" : "read",
tag,
fail_reason != NULL ?
fail_reason : "unknown");
if (cmd->comp_func) {
cmd->comp_func(port, tag,
cmd, -ENODATA);
}
continue;
}
}
/*
* First check if this command has
* exceeded its retries.
*/
if (reissue && (cmd->retries-- > 0)) {
set_bit(tag, tagaccum);
/* Re-issue the command. */
mtip_issue_ncq_command(port, tag);
continue;
}
/* Retire a command that will not be reissued */
dev_warn(&port->dd->pdev->dev,
"retiring tag %d\n", tag);
if (cmd->comp_func)
cmd->comp_func(port, tag, cmd, PORT_IRQ_TF_ERR);
else
dev_warn(&port->dd->pdev->dev,
"Bad completion for tag %d\n",
tag);
}
}
print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt);
handle_tfe_exit:
/* clear eh_active */
clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
wake_up_interruptible(&port->svc_wait);
}
/*
* Handle a set device bits interrupt
*/
static inline void mtip_workq_sdbfx(struct mtip_port *port, int group,
u32 completed)
{
struct driver_data *dd = port->dd;
int tag, bit;
struct mtip_cmd *command;
if (!completed) {
WARN_ON_ONCE(!completed);
return;
}
/* clear completed status register in the hardware.*/
writel(completed, port->completed[group]);
/* Process completed commands. */
for (bit = 0; (bit < 32) && completed; bit++) {
if (completed & 0x01) {
tag = (group << 5) | bit;
/* skip internal command slot. */
if (unlikely(tag == MTIP_TAG_INTERNAL))
continue;
command = mtip_cmd_from_tag(dd, tag);
if (likely(command->comp_func))
command->comp_func(port, tag, command, 0);
else {
dev_dbg(&dd->pdev->dev,
"Null completion for tag %d",
tag);
if (mtip_check_surprise_removal(
dd->pdev)) {
return;
}
}
}
completed >>= 1;
}
/* If last, re-enable interrupts */
if (atomic_dec_return(&dd->irq_workers_active) == 0)
writel(0xffffffff, dd->mmio + HOST_IRQ_STAT);
}
/*
* Process legacy pio and d2h interrupts
*/
static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat)
{
struct mtip_port *port = dd->port;
struct mtip_cmd *cmd = mtip_cmd_from_tag(dd, MTIP_TAG_INTERNAL);
if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) &&
(cmd != NULL) && !(readl(port->cmd_issue[MTIP_TAG_INTERNAL])
& (1 << MTIP_TAG_INTERNAL))) {
if (cmd->comp_func) {
cmd->comp_func(port, MTIP_TAG_INTERNAL, cmd, 0);
return;
}
}
return;
}
/*
* Demux and handle errors
*/
static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
{
if (unlikely(port_stat & PORT_IRQ_CONNECT)) {
dev_warn(&dd->pdev->dev,
"Clearing PxSERR.DIAG.x\n");
writel((1 << 26), dd->port->mmio + PORT_SCR_ERR);
}
if (unlikely(port_stat & PORT_IRQ_PHYRDY)) {
dev_warn(&dd->pdev->dev,
"Clearing PxSERR.DIAG.n\n");
writel((1 << 16), dd->port->mmio + PORT_SCR_ERR);
}
if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) {
dev_warn(&dd->pdev->dev,
"Port stat errors %x unhandled\n",
(port_stat & ~PORT_IRQ_HANDLED));
if (mtip_check_surprise_removal(dd->pdev))
return;
}
if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) {
set_bit(MTIP_PF_EH_ACTIVE_BIT, &dd->port->flags);
wake_up_interruptible(&dd->port->svc_wait);
}
}
static inline irqreturn_t mtip_handle_irq(struct driver_data *data)
{
struct driver_data *dd = (struct driver_data *) data;
struct mtip_port *port = dd->port;
u32 hba_stat, port_stat;
int rv = IRQ_NONE;
int do_irq_enable = 1, i, workers;
struct mtip_work *twork;
hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
if (hba_stat) {
rv = IRQ_HANDLED;
/* Acknowledge the interrupt status on the port.*/
port_stat = readl(port->mmio + PORT_IRQ_STAT);
writel(port_stat, port->mmio + PORT_IRQ_STAT);
/* Demux port status */
if (likely(port_stat & PORT_IRQ_SDB_FIS)) {
do_irq_enable = 0;
WARN_ON_ONCE(atomic_read(&dd->irq_workers_active) != 0);
/* Start at 1: group zero is always local? */
for (i = 0, workers = 0; i < MTIP_MAX_SLOT_GROUPS;
i++) {
twork = &dd->work[i];
twork->completed = readl(port->completed[i]);
if (twork->completed)
workers++;
}
atomic_set(&dd->irq_workers_active, workers);
if (workers) {
for (i = 1; i < MTIP_MAX_SLOT_GROUPS; i++) {
twork = &dd->work[i];
if (twork->completed)
queue_work_on(
twork->cpu_binding,
dd->isr_workq,
&twork->work);
}
if (likely(dd->work[0].completed))
mtip_workq_sdbfx(port, 0,
dd->work[0].completed);
} else {
/*
* Chip quirk: SDB interrupt but nothing
* to complete
*/
do_irq_enable = 1;
}
}
if (unlikely(port_stat & PORT_IRQ_ERR)) {
if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
/* don't proceed further */
return IRQ_HANDLED;
}
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
&dd->dd_flag))
return rv;
mtip_process_errors(dd, port_stat & PORT_IRQ_ERR);
}
if (unlikely(port_stat & PORT_IRQ_LEGACY))
mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY);
}
/* acknowledge interrupt */
if (unlikely(do_irq_enable))
writel(hba_stat, dd->mmio + HOST_IRQ_STAT);
return rv;
}
/*
* HBA interrupt subroutine.
*
* @irq IRQ number.
* @instance Pointer to the driver data structure.
*
* return value
* IRQ_HANDLED A HBA interrupt was pending and handled.
* IRQ_NONE This interrupt was not for the HBA.
*/
static irqreturn_t mtip_irq_handler(int irq, void *instance)
{
struct driver_data *dd = instance;
return mtip_handle_irq(dd);
}
static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag)
{
writel(1 << MTIP_TAG_BIT(tag),
port->cmd_issue[MTIP_TAG_INDEX(tag)]);
}
static bool mtip_pause_ncq(struct mtip_port *port,
struct host_to_dev_fis *fis)
{
struct host_to_dev_fis *reply;
unsigned long task_file_data;
reply = port->rxfis + RX_FIS_D2H_REG;
task_file_data = readl(port->mmio+PORT_TFDATA);
if (fis->command == ATA_CMD_SEC_ERASE_UNIT)
clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
if ((task_file_data & 1))
return false;
if (fis->command == ATA_CMD_SEC_ERASE_PREP) {
set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
port->ic_pause_timer = jiffies;
return true;
} else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) &&
(fis->features == 0x03)) {
set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
port->ic_pause_timer = jiffies;
return true;
} else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) ||
((fis->command == 0xFC) &&
(fis->features == 0x27 || fis->features == 0x72 ||
fis->features == 0x62 || fis->features == 0x26))) {
/* Com reset after secure erase or lowlevel format */
mtip_restart_port(port);
return false;
}
return false;
}
/*
* Wait for port to quiesce
*
* @port Pointer to port data structure
* @timeout Max duration to wait (ms)
*
* return value
* 0 Success
* -EBUSY Commands still active
*/
static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
{
unsigned long to;
unsigned int n;
unsigned int active = 1;
blk_mq_stop_hw_queues(port->dd->queue);
to = jiffies + msecs_to_jiffies(timeout);
do {
if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) &&
test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
msleep(20);
continue; /* svc thd is actively issuing commands */
}
msleep(100);
if (mtip_check_surprise_removal(port->dd->pdev))
goto err_fault;
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
goto err_fault;
/*
* Ignore s_active bit 0 of array element 0.
* This bit will always be set
*/
active = readl(port->s_active[0]) & 0xFFFFFFFE;
for (n = 1; n < port->dd->slot_groups; n++)
active |= readl(port->s_active[n]);
if (!active)
break;
} while (time_before(jiffies, to));
blk_mq_start_stopped_hw_queues(port->dd->queue, true);
return active ? -EBUSY : 0;
err_fault:
blk_mq_start_stopped_hw_queues(port->dd->queue, true);
return -EFAULT;
}
/*
* Execute an internal command and wait for the completion.
*
* @port Pointer to the port data structure.
* @fis Pointer to the FIS that describes the command.
* @fis_len Length in WORDS of the FIS.
* @buffer DMA accessible for command data.
* @buf_len Length, in bytes, of the data buffer.
* @opts Command header options, excluding the FIS length
* and the number of PRD entries.
* @timeout Time in ms to wait for the command to complete.
*
* return value
* 0 Command completed successfully.
* -EFAULT The buffer address is not correctly aligned.
* -EBUSY Internal command or other IO in progress.
* -EAGAIN Time out waiting for command to complete.
*/
static int mtip_exec_internal_command(struct mtip_port *port,
struct host_to_dev_fis *fis,
int fis_len,
dma_addr_t buffer,
int buf_len,
u32 opts,
gfp_t atomic,
unsigned long timeout)
{
struct mtip_cmd_sg *command_sg;
DECLARE_COMPLETION_ONSTACK(wait);
struct mtip_cmd *int_cmd;
struct driver_data *dd = port->dd;
int rv = 0;
/* Make sure the buffer is 8 byte aligned. This is asic specific. */
if (buffer & 0x00000007) {
dev_err(&dd->pdev->dev, "SG buffer is not 8 byte aligned\n");
return -EFAULT;
}
int_cmd = mtip_get_int_command(dd);
set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
port->ic_pause_timer = 0;
clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
if (atomic == GFP_KERNEL) {
if (fis->command != ATA_CMD_STANDBYNOW1) {
/* wait for io to complete if non atomic */
if (mtip_quiesce_io(port,
MTIP_QUIESCE_IO_TIMEOUT_MS) < 0) {
dev_warn(&dd->pdev->dev,
"Failed to quiesce IO\n");
mtip_put_int_command(dd, int_cmd);
clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
wake_up_interruptible(&port->svc_wait);
return -EBUSY;
}
}
/* Set the completion function and data for the command. */
int_cmd->comp_data = &wait;
int_cmd->comp_func = mtip_completion;
} else {
/* Clear completion - we're going to poll */
int_cmd->comp_data = NULL;
int_cmd->comp_func = mtip_null_completion;
}
/* Copy the command to the command table */
memcpy(int_cmd->command, fis, fis_len*4);
/* Populate the SG list */
int_cmd->command_header->opts =
__force_bit2int cpu_to_le32(opts | fis_len);
if (buf_len) {
command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ;
command_sg->info =
__force_bit2int cpu_to_le32((buf_len-1) & 0x3FFFFF);
command_sg->dba =
__force_bit2int cpu_to_le32(buffer & 0xFFFFFFFF);
command_sg->dba_upper =
__force_bit2int cpu_to_le32((buffer >> 16) >> 16);
int_cmd->command_header->opts |=
__force_bit2int cpu_to_le32((1 << 16));
}
/* Populate the command header */
int_cmd->command_header->byte_count = 0;
/* Issue the command to the hardware */
mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL);
if (atomic == GFP_KERNEL) {
/* Wait for the command to complete or timeout. */
if ((rv = wait_for_completion_interruptible_timeout(
&wait,
msecs_to_jiffies(timeout))) <= 0) {
if (rv == -ERESTARTSYS) { /* interrupted */
dev_err(&dd->pdev->dev,
"Internal command [%02X] was interrupted after %lu ms\n",
fis->command, timeout);
rv = -EINTR;
goto exec_ic_exit;
} else if (rv == 0) /* timeout */
dev_err(&dd->pdev->dev,
"Internal command did not complete [%02X] within timeout of %lu ms\n",
fis->command, timeout);
else
dev_err(&dd->pdev->dev,
"Internal command [%02X] wait returned code [%d] after %lu ms - unhandled\n",
fis->command, rv, timeout);
if (mtip_check_surprise_removal(dd->pdev) ||
test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
&dd->dd_flag)) {
dev_err(&dd->pdev->dev,
"Internal command [%02X] wait returned due to SR\n",
fis->command);
rv = -ENXIO;
goto exec_ic_exit;
}
mtip_device_reset(dd); /* recover from timeout issue */
rv = -EAGAIN;
goto exec_ic_exit;
}
} else {
u32 hba_stat, port_stat;
/* Spin for <timeout> checking if command still outstanding */
timeout = jiffies + msecs_to_jiffies(timeout);
while ((readl(port->cmd_issue[MTIP_TAG_INTERNAL])
& (1 << MTIP_TAG_INTERNAL))
&& time_before(jiffies, timeout)) {
if (mtip_check_surprise_removal(dd->pdev)) {
rv = -ENXIO;
goto exec_ic_exit;
}
if ((fis->command != ATA_CMD_STANDBYNOW1) &&
test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
&dd->dd_flag)) {
rv = -ENXIO;
goto exec_ic_exit;
}
port_stat = readl(port->mmio + PORT_IRQ_STAT);
if (!port_stat)
continue;
if (port_stat & PORT_IRQ_ERR) {
dev_err(&dd->pdev->dev,
"Internal command [%02X] failed\n",
fis->command);
mtip_device_reset(dd);
rv = -EIO;
goto exec_ic_exit;
} else {
writel(port_stat, port->mmio + PORT_IRQ_STAT);
hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
if (hba_stat)
writel(hba_stat,
dd->mmio + HOST_IRQ_STAT);
}
break;
}
}
if (readl(port->cmd_issue[MTIP_TAG_INTERNAL])
& (1 << MTIP_TAG_INTERNAL)) {
rv = -ENXIO;
if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
mtip_device_reset(dd);
rv = -EAGAIN;
}
}
exec_ic_exit:
/* Clear the allocated and active bits for the internal command. */
mtip_put_int_command(dd, int_cmd);
if (rv >= 0 && mtip_pause_ncq(port, fis)) {
/* NCQ paused */
return rv;
}
clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
wake_up_interruptible(&port->svc_wait);
return rv;
}
/*
* Byte-swap ATA ID strings.
*
* ATA identify data contains strings in byte-swapped 16-bit words.
* They must be swapped (on all architectures) to be usable as C strings.
* This function swaps bytes in-place.
*
* @buf The buffer location of the string
* @len The number of bytes to swap
*
* return value
* None
*/
static inline void ata_swap_string(u16 *buf, unsigned int len)
{
int i;
for (i = 0; i < (len/2); i++)
be16_to_cpus(&buf[i]);
}
static void mtip_set_timeout(struct driver_data *dd,
struct host_to_dev_fis *fis,
unsigned int *timeout, u8 erasemode)
{
switch (fis->command) {
case ATA_CMD_DOWNLOAD_MICRO:
*timeout = 120000; /* 2 minutes */
break;
case ATA_CMD_SEC_ERASE_UNIT:
case 0xFC:
if (erasemode)
*timeout = ((*(dd->port->identify + 90) * 2) * 60000);
else
*timeout = ((*(dd->port->identify + 89) * 2) * 60000);
break;
case ATA_CMD_STANDBYNOW1:
*timeout = 120000; /* 2 minutes */
break;
case 0xF7:
case 0xFA:
*timeout = 60000; /* 60 seconds */
break;
case ATA_CMD_SMART:
*timeout = 15000; /* 15 seconds */
break;
default:
*timeout = MTIP_IOCTL_CMD_TIMEOUT_MS;
break;
}
}
/*
* Request the device identity information.
*
* If a user space buffer is not specified, i.e. is NULL, the
* identify information is still read from the drive and placed
* into the identify data buffer (@e port->identify) in the
* port data structure.
* When the identify buffer contains valid identify information @e
* port->identify_valid is non-zero.
*
* @port Pointer to the port structure.
* @user_buffer A user space buffer where the identify data should be
* copied.
*
* return value
* 0 Command completed successfully.
* -EFAULT An error occurred while coping data to the user buffer.
* -1 Command failed.
*/
static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
{
int rv = 0;
struct host_to_dev_fis fis;
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
return -EFAULT;
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = ATA_CMD_ID_ATA;
/* Set the identify information as invalid. */
port->identify_valid = 0;
/* Clear the identify information. */
memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS);
/* Execute the command. */
if (mtip_exec_internal_command(port,
&fis,
5,
port->identify_dma,
sizeof(u16) * ATA_ID_WORDS,
0,
GFP_KERNEL,
MTIP_INT_CMD_TIMEOUT_MS)
< 0) {
rv = -1;
goto out;
}
/*
* Perform any necessary byte-swapping. Yes, the kernel does in fact
* perform field-sensitive swapping on the string fields.
* See the kernel use of ata_id_string() for proof of this.
*/
#ifdef __LITTLE_ENDIAN
ata_swap_string(port->identify + 27, 40); /* model string*/
ata_swap_string(port->identify + 23, 8); /* firmware string*/
ata_swap_string(port->identify + 10, 20); /* serial# string*/
#else
{
int i;
for (i = 0; i < ATA_ID_WORDS; i++)
port->identify[i] = le16_to_cpu(port->identify[i]);
}
#endif
/* Check security locked state */
if (port->identify[128] & 0x4)
set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
else
clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
#ifdef MTIP_TRIM /* Disabling TRIM support temporarily */
/* Demux ID.DRAT & ID.RZAT to determine trim support */
if (port->identify[69] & (1 << 14) && port->identify[69] & (1 << 5))
port->dd->trim_supp = true;
else
#endif
port->dd->trim_supp = false;
/* Set the identify buffer as valid. */
port->identify_valid = 1;
if (user_buffer) {
if (copy_to_user(
user_buffer,
port->identify,
ATA_ID_WORDS * sizeof(u16))) {
rv = -EFAULT;
goto out;
}
}
out:
return rv;
}
/*
* Issue a standby immediate command to the device.
*
* @port Pointer to the port structure.
*
* return value
* 0 Command was executed successfully.
* -1 An error occurred while executing the command.
*/
static int mtip_standby_immediate(struct mtip_port *port)
{
int rv;
struct host_to_dev_fis fis;
unsigned long start;
unsigned int timeout;
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = ATA_CMD_STANDBYNOW1;
mtip_set_timeout(port->dd, &fis, &timeout, 0);
start = jiffies;
rv = mtip_exec_internal_command(port,
&fis,
5,
0,
0,
0,
GFP_ATOMIC,
timeout);
dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n",
jiffies_to_msecs(jiffies - start));
if (rv)
dev_warn(&port->dd->pdev->dev,
"STANDBY IMMEDIATE command failed.\n");
return rv;
}
/*
* Issue a READ LOG EXT command to the device.
*
* @port pointer to the port structure.
* @page page number to fetch
* @buffer pointer to buffer
* @buffer_dma dma address corresponding to @buffer
* @sectors page length to fetch, in sectors
*
* return value
* @rv return value from mtip_exec_internal_command()
*/
static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
dma_addr_t buffer_dma, unsigned int sectors)
{
struct host_to_dev_fis fis;
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = ATA_CMD_READ_LOG_EXT;
fis.sect_count = sectors & 0xFF;
fis.sect_cnt_ex = (sectors >> 8) & 0xFF;
fis.lba_low = page;
fis.lba_mid = 0;
fis.device = ATA_DEVICE_OBS;
memset(buffer, 0, sectors * ATA_SECT_SIZE);
return mtip_exec_internal_command(port,
&fis,
5,
buffer_dma,
sectors * ATA_SECT_SIZE,
0,
GFP_ATOMIC,
MTIP_INT_CMD_TIMEOUT_MS);
}
/*
* Issue a SMART READ DATA command to the device.
*
* @port pointer to the port structure.
* @buffer pointer to buffer
* @buffer_dma dma address corresponding to @buffer
*
* return value
* @rv return value from mtip_exec_internal_command()
*/
static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer,
dma_addr_t buffer_dma)
{
struct host_to_dev_fis fis;
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = ATA_CMD_SMART;
fis.features = 0xD0;
fis.sect_count = 1;
fis.lba_mid = 0x4F;
fis.lba_hi = 0xC2;
fis.device = ATA_DEVICE_OBS;
return mtip_exec_internal_command(port,
&fis,
5,
buffer_dma,
ATA_SECT_SIZE,
0,
GFP_ATOMIC,
15000);
}
/*
* Get the value of a smart attribute
*
* @port pointer to the port structure
* @id attribute number
* @attrib pointer to return attrib information corresponding to @id
*
* return value
* -EINVAL NULL buffer passed or unsupported attribute @id.
* -EPERM Identify data not valid, SMART not supported or not enabled
*/
static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
struct smart_attr *attrib)
{
int rv, i;
struct smart_attr *pattr;
if (!attrib)
return -EINVAL;
if (!port->identify_valid) {
dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n");
return -EPERM;
}
if (!(port->identify[82] & 0x1)) {
dev_warn(&port->dd->pdev->dev, "SMART not supported\n");
return -EPERM;
}
if (!(port->identify[85] & 0x1)) {
dev_warn(&port->dd->pdev->dev, "SMART not enabled\n");
return -EPERM;
}
memset(port->smart_buf, 0, ATA_SECT_SIZE);
rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma);
if (rv) {
dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n");
return rv;
}
pattr = (struct smart_attr *)(port->smart_buf + 2);
for (i = 0; i < 29; i++, pattr++)
if (pattr->attr_id == id) {
memcpy(attrib, pattr, sizeof(struct smart_attr));
break;
}
if (i == 29) {
dev_warn(&port->dd->pdev->dev,
"Query for invalid SMART attribute ID\n");
rv = -EINVAL;
}
return rv;
}
/*
* Trim unused sectors
*
* @dd pointer to driver_data structure
* @lba starting lba
* @len # of 512b sectors to trim
*
* return value
* -ENOMEM Out of dma memory
* -EINVAL Invalid parameters passed in, trim not supported
* -EIO Error submitting trim request to hw
*/
static int mtip_send_trim(struct driver_data *dd, unsigned int lba,
unsigned int len)
{
int i, rv = 0;
u64 tlba, tlen, sect_left;
struct mtip_trim_entry *buf;
dma_addr_t dma_addr;
struct host_to_dev_fis fis;
if (!len || dd->trim_supp == false)
return -EINVAL;
/* Trim request too big */
WARN_ON(len > (MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES));
/* Trim request not aligned on 4k boundary */
WARN_ON(len % 8 != 0);
/* Warn if vu_trim structure is too big */
WARN_ON(sizeof(struct mtip_trim) > ATA_SECT_SIZE);
/* Allocate a DMA buffer for the trim structure */
buf = dmam_alloc_coherent(&dd->pdev->dev, ATA_SECT_SIZE, &dma_addr,
GFP_KERNEL);
if (!buf)
return -ENOMEM;
memset(buf, 0, ATA_SECT_SIZE);
for (i = 0, sect_left = len, tlba = lba;
i < MTIP_MAX_TRIM_ENTRIES && sect_left;
i++) {
tlen = (sect_left >= MTIP_MAX_TRIM_ENTRY_LEN ?
MTIP_MAX_TRIM_ENTRY_LEN :
sect_left);
buf[i].lba = __force_bit2int cpu_to_le32(tlba);
buf[i].range = __force_bit2int cpu_to_le16(tlen);
tlba += tlen;
sect_left -= tlen;
}
WARN_ON(sect_left != 0);
/* Build the fis */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = 0xfb;
fis.features = 0x60;
fis.sect_count = 1;
fis.device = ATA_DEVICE_OBS;
if (mtip_exec_internal_command(dd->port,
&fis,
5,
dma_addr,
ATA_SECT_SIZE,
0,
GFP_KERNEL,
MTIP_TRIM_TIMEOUT_MS) < 0)
rv = -EIO;
dmam_free_coherent(&dd->pdev->dev, ATA_SECT_SIZE, buf, dma_addr);
return rv;
}
/*
* Get the drive capacity.
*
* @dd Pointer to the device data structure.
* @sectors Pointer to the variable that will receive the sector count.
*
* return value
* 1 Capacity was returned successfully.
* 0 The identify information is invalid.
*/
static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors)
{
struct mtip_port *port = dd->port;
u64 total, raw0, raw1, raw2, raw3;
raw0 = port->identify[100];
raw1 = port->identify[101];
raw2 = port->identify[102];
raw3 = port->identify[103];
total = raw0 | raw1<<16 | raw2<<32 | raw3<<48;
*sectors = total;
return (bool) !!port->identify_valid;
}
/*
* Display the identify command data.
*
* @port Pointer to the port data structure.
*
* return value
* None
*/
static void mtip_dump_identify(struct mtip_port *port)
{
sector_t sectors;
unsigned short revid;
char cbuf[42];
if (!port->identify_valid)
return;
strlcpy(cbuf, (char *)(port->identify+10), 21);
dev_info(&port->dd->pdev->dev,
"Serial No.: %s\n", cbuf);
strlcpy(cbuf, (char *)(port->identify+23), 9);
dev_info(&port->dd->pdev->dev,
"Firmware Ver.: %s\n", cbuf);
strlcpy(cbuf, (char *)(port->identify+27), 41);
dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf);
dev_info(&port->dd->pdev->dev, "Security: %04x %s\n",
port->identify[128],
port->identify[128] & 0x4 ? "(LOCKED)" : "");
if (mtip_hw_get_capacity(port->dd, &sectors))
dev_info(&port->dd->pdev->dev,
"Capacity: %llu sectors (%llu MB)\n",
(u64)sectors,
((u64)sectors) * ATA_SECT_SIZE >> 20);
pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid);
switch (revid & 0xFF) {
case 0x1:
strlcpy(cbuf, "A0", 3);
break;
case 0x3:
strlcpy(cbuf, "A2", 3);
break;
default:
strlcpy(cbuf, "?", 2);
break;
}
dev_info(&port->dd->pdev->dev,
"Card Type: %s\n", cbuf);
}
/*
* Map the commands scatter list into the command table.
*
* @command Pointer to the command.
* @nents Number of scatter list entries.
*
* return value
* None
*/
static inline void fill_command_sg(struct driver_data *dd,
struct mtip_cmd *command,
int nents)
{
int n;
unsigned int dma_len;
struct mtip_cmd_sg *command_sg;
struct scatterlist *sg = command->sg;
command_sg = command->command + AHCI_CMD_TBL_HDR_SZ;
for (n = 0; n < nents; n++) {
dma_len = sg_dma_len(sg);
if (dma_len > 0x400000)
dev_err(&dd->pdev->dev,
"DMA segment length truncated\n");
command_sg->info = __force_bit2int
cpu_to_le32((dma_len-1) & 0x3FFFFF);
command_sg->dba = __force_bit2int
cpu_to_le32(sg_dma_address(sg));
command_sg->dba_upper = __force_bit2int
cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
command_sg++;
sg++;
}
}
/*
* @brief Execute a drive command.
*
* return value 0 The command completed successfully.
* return value -1 An error occurred while executing the command.
*/
static int exec_drive_task(struct mtip_port *port, u8 *command)
{
struct host_to_dev_fis fis;
struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG);
unsigned int to;
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = command[0];
fis.features = command[1];
fis.sect_count = command[2];
fis.sector = command[3];
fis.cyl_low = command[4];
fis.cyl_hi = command[5];
fis.device = command[6] & ~0x10; /* Clear the dev bit*/
mtip_set_timeout(port->dd, &fis, &to, 0);
dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
__func__,
command[0],
command[1],
command[2],
command[3],
command[4],
command[5],
command[6]);
/* Execute the command. */
if (mtip_exec_internal_command(port,
&fis,
5,
0,
0,
0,
GFP_KERNEL,
to) < 0) {
return -1;
}
command[0] = reply->command; /* Status*/
command[1] = reply->features; /* Error*/
command[4] = reply->cyl_low;
command[5] = reply->cyl_hi;
dbg_printk(MTIP_DRV_NAME " %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
__func__,
command[0],
command[1],
command[4],
command[5]);
return 0;
}
/*
* @brief Execute a drive command.
*
* @param port Pointer to the port data structure.
* @param command Pointer to the user specified command parameters.
* @param user_buffer Pointer to the user space buffer where read sector
* data should be copied.
*
* return value 0 The command completed successfully.
* return value -EFAULT An error occurred while copying the completion
* data to the user space buffer.
* return value -1 An error occurred while executing the command.
*/
static int exec_drive_command(struct mtip_port *port, u8 *command,
void __user *user_buffer)
{
struct host_to_dev_fis fis;
struct host_to_dev_fis *reply;
u8 *buf = NULL;
dma_addr_t dma_addr = 0;
int rv = 0, xfer_sz = command[3];
unsigned int to;
if (xfer_sz) {
if (!user_buffer)
return -EFAULT;
buf = dmam_alloc_coherent(&port->dd->pdev->dev,
ATA_SECT_SIZE * xfer_sz,
&dma_addr,
GFP_KERNEL);
if (!buf) {
dev_err(&port->dd->pdev->dev,
"Memory allocation failed (%d bytes)\n",
ATA_SECT_SIZE * xfer_sz);
return -ENOMEM;
}
memset(buf, 0, ATA_SECT_SIZE * xfer_sz);
}
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = command[0];
fis.features = command[2];
fis.sect_count = command[3];
if (fis.command == ATA_CMD_SMART) {
fis.sector = command[1];
fis.cyl_low = 0x4F;
fis.cyl_hi = 0xC2;
}
mtip_set_timeout(port->dd, &fis, &to, 0);
if (xfer_sz)
reply = (port->rxfis + RX_FIS_PIO_SETUP);
else
reply = (port->rxfis + RX_FIS_D2H_REG);
dbg_printk(MTIP_DRV_NAME
" %s: User Command: cmd %x, sect %x, "
"feat %x, sectcnt %x\n",
__func__,
command[0],
command[1],
command[2],
command[3]);
/* Execute the command. */
if (mtip_exec_internal_command(port,
&fis,
5,
(xfer_sz ? dma_addr : 0),
(xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0),
0,
GFP_KERNEL,
to)
< 0) {
rv = -EFAULT;
goto exit_drive_command;
}
/* Collect the completion status. */
command[0] = reply->command; /* Status*/
command[1] = reply->features; /* Error*/
command[2] = reply->sect_count;
dbg_printk(MTIP_DRV_NAME
" %s: Completion Status: stat %x, "
"err %x, nsect %x\n",
__func__,
command[0],
command[1],
command[2]);
if (xfer_sz) {
if (copy_to_user(user_buffer,
buf,
ATA_SECT_SIZE * command[3])) {
rv = -EFAULT;
goto exit_drive_command;
}
}
exit_drive_command:
if (buf)
dmam_free_coherent(&port->dd->pdev->dev,
ATA_SECT_SIZE * xfer_sz, buf, dma_addr);
return rv;
}
/*
* Indicates whether a command has a single sector payload.
*
* @command passed to the device to perform the certain event.
* @features passed to the device to perform the certain event.
*
* return value
* 1 command is one that always has a single sector payload,
* regardless of the value in the Sector Count field.
* 0 otherwise
*
*/
static unsigned int implicit_sector(unsigned char command,
unsigned char features)
{
unsigned int rv = 0;
/* list of commands that have an implicit sector count of 1 */
switch (command) {
case ATA_CMD_SEC_SET_PASS:
case ATA_CMD_SEC_UNLOCK:
case ATA_CMD_SEC_ERASE_PREP:
case ATA_CMD_SEC_ERASE_UNIT:
case ATA_CMD_SEC_FREEZE_LOCK:
case ATA_CMD_SEC_DISABLE_PASS:
case ATA_CMD_PMP_READ:
case ATA_CMD_PMP_WRITE:
rv = 1;
break;
case ATA_CMD_SET_MAX:
if (features == ATA_SET_MAX_UNLOCK)
rv = 1;
break;
case ATA_CMD_SMART:
if ((features == ATA_SMART_READ_VALUES) ||
(features == ATA_SMART_READ_THRESHOLDS))
rv = 1;
break;
case ATA_CMD_CONF_OVERLAY:
if ((features == ATA_DCO_IDENTIFY) ||
(features == ATA_DCO_SET))
rv = 1;
break;
}
return rv;
}
/*
* Executes a taskfile
* See ide_taskfile_ioctl() for derivation
*/
static int exec_drive_taskfile(struct driver_data *dd,
void __user *buf,
ide_task_request_t *req_task,
int outtotal)
{
struct host_to_dev_fis fis;
struct host_to_dev_fis *reply;
u8 *outbuf = NULL;
u8 *inbuf = NULL;
dma_addr_t outbuf_dma = 0;
dma_addr_t inbuf_dma = 0;
dma_addr_t dma_buffer = 0;
int err = 0;
unsigned int taskin = 0;
unsigned int taskout = 0;
u8 nsect = 0;
unsigned int timeout;
unsigned int force_single_sector;
unsigned int transfer_size;
unsigned long task_file_data;
int intotal = outtotal + req_task->out_size;
int erasemode = 0;
taskout = req_task->out_size;
taskin = req_task->in_size;
/* 130560 = 512 * 0xFF*/
if (taskin > 130560 || taskout > 130560) {
err = -EINVAL;
goto abort;
}
if (taskout) {
outbuf = kzalloc(taskout, GFP_KERNEL);
if (outbuf == NULL) {
err = -ENOMEM;
goto abort;
}
if (copy_from_user(outbuf, buf + outtotal, taskout)) {
err = -EFAULT;
goto abort;
}
outbuf_dma = pci_map_single(dd->pdev,
outbuf,
taskout,
DMA_TO_DEVICE);
if (outbuf_dma == 0) {
err = -ENOMEM;
goto abort;
}
dma_buffer = outbuf_dma;
}
if (taskin) {
inbuf = kzalloc(taskin, GFP_KERNEL);
if (inbuf == NULL) {
err = -ENOMEM;
goto abort;
}
if (copy_from_user(inbuf, buf + intotal, taskin)) {
err = -EFAULT;
goto abort;
}
inbuf_dma = pci_map_single(dd->pdev,
inbuf,
taskin, DMA_FROM_DEVICE);
if (inbuf_dma == 0) {
err = -ENOMEM;
goto abort;
}
dma_buffer = inbuf_dma;
}
/* only supports PIO and non-data commands from this ioctl. */
switch (req_task->data_phase) {
case TASKFILE_OUT:
nsect = taskout / ATA_SECT_SIZE;
reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
break;
case TASKFILE_IN:
reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
break;
case TASKFILE_NO_DATA:
reply = (dd->port->rxfis + RX_FIS_D2H_REG);
break;
default:
err = -EINVAL;
goto abort;
}
/* Build the FIS. */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = req_task->io_ports[7];
fis.features = req_task->io_ports[1];
fis.sect_count = req_task->io_ports[2];
fis.lba_low = req_task->io_ports[3];
fis.lba_mid = req_task->io_ports[4];
fis.lba_hi = req_task->io_ports[5];
/* Clear the dev bit*/
fis.device = req_task->io_ports[6] & ~0x10;
if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) {
req_task->in_flags.all =
IDE_TASKFILE_STD_IN_FLAGS |
(IDE_HOB_STD_IN_FLAGS << 8);
fis.lba_low_ex = req_task->hob_ports[3];
fis.lba_mid_ex = req_task->hob_ports[4];
fis.lba_hi_ex = req_task->hob_ports[5];
fis.features_ex = req_task->hob_ports[1];
fis.sect_cnt_ex = req_task->hob_ports[2];
} else {
req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
}
force_single_sector = implicit_sector(fis.command, fis.features);
if ((taskin || taskout) && (!fis.sect_count)) {
if (nsect)
fis.sect_count = nsect;
else {
if (!force_single_sector) {
dev_warn(&dd->pdev->dev,
"data movement but "
"sect_count is 0\n");
err = -EINVAL;
goto abort;
}
}
}
dbg_printk(MTIP_DRV_NAME
" %s: cmd %x, feat %x, nsect %x,"
" sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
" head/dev %x\n",
__func__,
fis.command,
fis.features,
fis.sect_count,
fis.lba_low,
fis.lba_mid,
fis.lba_hi,
fis.device);
/* check for erase mode support during secure erase.*/
if ((fis.command == ATA_CMD_SEC_ERASE_UNIT) && outbuf &&
(outbuf[0] & MTIP_SEC_ERASE_MODE)) {
erasemode = 1;
}
mtip_set_timeout(dd, &fis, &timeout, erasemode);
/* Determine the correct transfer size.*/
if (force_single_sector)
transfer_size = ATA_SECT_SIZE;
else
transfer_size = ATA_SECT_SIZE * fis.sect_count;
/* Execute the command.*/
if (mtip_exec_internal_command(dd->port,
&fis,
5,
dma_buffer,
transfer_size,
0,
GFP_KERNEL,
timeout) < 0) {
err = -EIO;
goto abort;
}
task_file_data = readl(dd->port->mmio+PORT_TFDATA);
if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) {
reply = dd->port->rxfis + RX_FIS_PIO_SETUP;
req_task->io_ports[7] = reply->control;
} else {
reply = dd->port->rxfis + RX_FIS_D2H_REG;
req_task->io_ports[7] = reply->command;
}
/* reclaim the DMA buffers.*/
if (inbuf_dma)
pci_unmap_single(dd->pdev, inbuf_dma,
taskin, DMA_FROM_DEVICE);
if (outbuf_dma)
pci_unmap_single(dd->pdev, outbuf_dma,
taskout, DMA_TO_DEVICE);
inbuf_dma = 0;
outbuf_dma = 0;
/* return the ATA registers to the caller.*/
req_task->io_ports[1] = reply->features;
req_task->io_ports[2] = reply->sect_count;
req_task->io_ports[3] = reply->lba_low;
req_task->io_ports[4] = reply->lba_mid;
req_task->io_ports[5] = reply->lba_hi;
req_task->io_ports[6] = reply->device;
if (req_task->out_flags.all & 1) {
req_task->hob_ports[3] = reply->lba_low_ex;
req_task->hob_ports[4] = reply->lba_mid_ex;
req_task->hob_ports[5] = reply->lba_hi_ex;
req_task->hob_ports[1] = reply->features_ex;
req_task->hob_ports[2] = reply->sect_cnt_ex;
}
dbg_printk(MTIP_DRV_NAME
" %s: Completion: stat %x,"
"err %x, sect_cnt %x, lbalo %x,"
"lbamid %x, lbahi %x, dev %x\n",
__func__,
req_task->io_ports[7],
req_task->io_ports[1],
req_task->io_ports[2],
req_task->io_ports[3],
req_task->io_ports[4],
req_task->io_ports[5],
req_task->io_ports[6]);
if (taskout) {
if (copy_to_user(buf + outtotal, outbuf, taskout)) {
err = -EFAULT;
goto abort;
}
}
if (taskin) {
if (copy_to_user(buf + intotal, inbuf, taskin)) {
err = -EFAULT;
goto abort;
}
}
abort:
if (inbuf_dma)
pci_unmap_single(dd->pdev, inbuf_dma,
taskin, DMA_FROM_DEVICE);
if (outbuf_dma)
pci_unmap_single(dd->pdev, outbuf_dma,
taskout, DMA_TO_DEVICE);
kfree(outbuf);
kfree(inbuf);
return err;
}
/*
* Handle IOCTL calls from the Block Layer.
*
* This function is called by the Block Layer when it receives an IOCTL
* command that it does not understand. If the IOCTL command is not supported
* this function returns -ENOTTY.
*
* @dd Pointer to the driver data structure.
* @cmd IOCTL command passed from the Block Layer.
* @arg IOCTL argument passed from the Block Layer.
*
* return value
* 0 The IOCTL completed successfully.
* -ENOTTY The specified command is not supported.
* -EFAULT An error occurred copying data to a user space buffer.
* -EIO An error occurred while executing the command.
*/
static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd,
unsigned long arg)
{
switch (cmd) {
case HDIO_GET_IDENTITY:
{
if (copy_to_user((void __user *)arg, dd->port->identify,
sizeof(u16) * ATA_ID_WORDS))
return -EFAULT;
break;
}
case HDIO_DRIVE_CMD:
{
u8 drive_command[4];
/* Copy the user command info to our buffer. */
if (copy_from_user(drive_command,
(void __user *) arg,
sizeof(drive_command)))
return -EFAULT;
/* Execute the drive command. */
if (exec_drive_command(dd->port,
drive_command,
(void __user *) (arg+4)))
return -EIO;
/* Copy the status back to the users buffer. */
if (copy_to_user((void __user *) arg,
drive_command,
sizeof(drive_command)))
return -EFAULT;
break;
}
case HDIO_DRIVE_TASK:
{
u8 drive_command[7];
/* Copy the user command info to our buffer. */
if (copy_from_user(drive_command,
(void __user *) arg,
sizeof(drive_command)))
return -EFAULT;
/* Execute the drive command. */
if (exec_drive_task(dd->port, drive_command))
return -EIO;
/* Copy the status back to the users buffer. */
if (copy_to_user((void __user *) arg,
drive_command,
sizeof(drive_command)))
return -EFAULT;
break;
}
case HDIO_DRIVE_TASKFILE: {
ide_task_request_t req_task;
int ret, outtotal;
if (copy_from_user(&req_task, (void __user *) arg,
sizeof(req_task)))
return -EFAULT;
outtotal = sizeof(req_task);
ret = exec_drive_taskfile(dd, (void __user *) arg,
&req_task, outtotal);
if (copy_to_user((void __user *) arg, &req_task,
sizeof(req_task)))
return -EFAULT;
return ret;
}
default:
return -EINVAL;
}
return 0;
}
/*
* Submit an IO to the hw
*
* This function is called by the block layer to issue an io
* to the device. Upon completion, the callback function will
* be called with the data parameter passed as the callback data.
*
* @dd Pointer to the driver data structure.
* @start First sector to read.
* @nsect Number of sectors to read.
* @nents Number of entries in scatter list for the read command.
* @tag The tag of this read command.
* @callback Pointer to the function that should be called
* when the read completes.
* @data Callback data passed to the callback function
* when the read completes.
* @dir Direction (read or write)
*
* return value
* None
*/
static void mtip_hw_submit_io(struct driver_data *dd, struct request *rq,
struct mtip_cmd *command, int nents,
struct blk_mq_hw_ctx *hctx)
{
struct host_to_dev_fis *fis;
struct mtip_port *port = dd->port;
int dma_dir = rq_data_dir(rq) == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
u64 start = blk_rq_pos(rq);
unsigned int nsect = blk_rq_sectors(rq);
/* Map the scatter list for DMA access */
nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir);
prefetch(&port->flags);
command->scatter_ents = nents;
/*
* The number of retries for this command before it is
* reported as a failure to the upper layers.
*/
command->retries = MTIP_MAX_RETRIES;
/* Fill out fis */
fis = command->command;
fis->type = 0x27;
fis->opts = 1 << 7;
if (dma_dir == DMA_FROM_DEVICE)
fis->command = ATA_CMD_FPDMA_READ;
else
fis->command = ATA_CMD_FPDMA_WRITE;
fis->lba_low = start & 0xFF;
fis->lba_mid = (start >> 8) & 0xFF;
fis->lba_hi = (start >> 16) & 0xFF;
fis->lba_low_ex = (start >> 24) & 0xFF;
fis->lba_mid_ex = (start >> 32) & 0xFF;
fis->lba_hi_ex = (start >> 40) & 0xFF;
fis->device = 1 << 6;
fis->features = nsect & 0xFF;
fis->features_ex = (nsect >> 8) & 0xFF;
fis->sect_count = ((rq->tag << 3) | (rq->tag >> 5));
fis->sect_cnt_ex = 0;
fis->control = 0;
fis->res2 = 0;
fis->res3 = 0;
fill_command_sg(dd, command, nents);
if (unlikely(command->unaligned))
fis->device |= 1 << 7;
/* Populate the command header */
command->command_header->opts =
__force_bit2int cpu_to_le32(
(nents << 16) | 5 | AHCI_CMD_PREFETCH);
command->command_header->byte_count = 0;
/*
* Set the completion function and data for the command
* within this layer.
*/
command->comp_data = dd;
command->comp_func = mtip_async_complete;
command->direction = dma_dir;
/*
* To prevent this command from being issued
* if an internal command is in progress or error handling is active.
*/
if (unlikely(port->flags & MTIP_PF_PAUSE_IO)) {
set_bit(rq->tag, port->cmds_to_issue);
set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
return;
}
/* Issue the command to the hardware */
mtip_issue_ncq_command(port, rq->tag);
}
/*
* Sysfs status dump.
*
* @dev Pointer to the device structure, passed by the kernrel.
* @attr Pointer to the device_attribute structure passed by the kernel.
* @buf Pointer to the char buffer that will receive the stats info.
*
* return value
* The size, in bytes, of the data copied into buf.
*/
static ssize_t mtip_hw_show_status(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct driver_data *dd = dev_to_disk(dev)->private_data;
int size = 0;
if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))
size += sprintf(buf, "%s", "thermal_shutdown\n");
else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag))
size += sprintf(buf, "%s", "write_protect\n");
else
size += sprintf(buf, "%s", "online\n");
return size;
}
static DEVICE_ATTR(status, S_IRUGO, mtip_hw_show_status, NULL);
/* debugsfs entries */
static ssize_t show_device_status(struct device_driver *drv, char *buf)
{
int size = 0;
struct driver_data *dd, *tmp;
unsigned long flags;
char id_buf[42];
u16 status = 0;
spin_lock_irqsave(&dev_lock, flags);
size += sprintf(&buf[size], "Devices Present:\n");
list_for_each_entry_safe(dd, tmp, &online_list, online_list) {
if (dd->pdev) {
if (dd->port &&
dd->port->identify &&
dd->port->identify_valid) {
strlcpy(id_buf,
(char *) (dd->port->identify + 10), 21);
status = *(dd->port->identify + 141);
} else {
memset(id_buf, 0, 42);
status = 0;
}
if (dd->port &&
test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
size += sprintf(&buf[size],
" device %s %s (ftl rebuild %d %%)\n",
dev_name(&dd->pdev->dev),
id_buf,
status);
} else {
size += sprintf(&buf[size],
" device %s %s\n",
dev_name(&dd->pdev->dev),
id_buf);
}
}
}
size += sprintf(&buf[size], "Devices Being Removed:\n");
list_for_each_entry_safe(dd, tmp, &removing_list, remove_list) {
if (dd->pdev) {
if (dd->port &&
dd->port->identify &&
dd->port->identify_valid) {
strlcpy(id_buf,
(char *) (dd->port->identify+10), 21);
status = *(dd->port->identify + 141);
} else {
memset(id_buf, 0, 42);
status = 0;
}
if (dd->port &&
test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
size += sprintf(&buf[size],
" device %s %s (ftl rebuild %d %%)\n",
dev_name(&dd->pdev->dev),
id_buf,
status);
} else {
size += sprintf(&buf[size],
" device %s %s\n",
dev_name(&dd->pdev->dev),
id_buf);
}
}
}
spin_unlock_irqrestore(&dev_lock, flags);
return size;
}
static ssize_t mtip_hw_read_device_status(struct file *f, char __user *ubuf,
size_t len, loff_t *offset)
{
struct driver_data *dd = (struct driver_data *)f->private_data;
int size = *offset;
char *buf;
int rv = 0;
if (!len || *offset)
return 0;
buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
if (!buf) {
dev_err(&dd->pdev->dev,
"Memory allocation: status buffer\n");
return -ENOMEM;
}
size += show_device_status(NULL, buf);
*offset = size <= len ? size : len;
size = copy_to_user(ubuf, buf, *offset);
if (size)
rv = -EFAULT;
kfree(buf);
return rv ? rv : *offset;
}
static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf,
size_t len, loff_t *offset)
{
struct driver_data *dd = (struct driver_data *)f->private_data;
char *buf;
u32 group_allocated;
int size = *offset;
int n, rv = 0;
if (!len || size)
return 0;
buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
if (!buf) {
dev_err(&dd->pdev->dev,
"Memory allocation: register buffer\n");
return -ENOMEM;
}
size += sprintf(&buf[size], "H/ S ACTive : [ 0x");
for (n = dd->slot_groups-1; n >= 0; n--)
size += sprintf(&buf[size], "%08X ",
readl(dd->port->s_active[n]));
size += sprintf(&buf[size], "]\n");
size += sprintf(&buf[size], "H/ Command Issue : [ 0x");
for (n = dd->slot_groups-1; n >= 0; n--)
size += sprintf(&buf[size], "%08X ",
readl(dd->port->cmd_issue[n]));
size += sprintf(&buf[size], "]\n");
size += sprintf(&buf[size], "H/ Completed : [ 0x");
for (n = dd->slot_groups-1; n >= 0; n--)
size += sprintf(&buf[size], "%08X ",
readl(dd->port->completed[n]));
size += sprintf(&buf[size], "]\n");
size += sprintf(&buf[size], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
readl(dd->port->mmio + PORT_IRQ_STAT));
size += sprintf(&buf[size], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
readl(dd->mmio + HOST_IRQ_STAT));
size += sprintf(&buf[size], "\n");
size += sprintf(&buf[size], "L/ Allocated : [ 0x");
for (n = dd->slot_groups-1; n >= 0; n--) {
if (sizeof(long) > sizeof(u32))
group_allocated =
dd->port->allocated[n/2] >> (32*(n&1));
else
group_allocated = dd->port->allocated[n];
size += sprintf(&buf[size], "%08X ", group_allocated);
}
size += sprintf(&buf[size], "]\n");
size += sprintf(&buf[size], "L/ Commands in Q : [ 0x");
for (n = dd->slot_groups-1; n >= 0; n--) {
if (sizeof(long) > sizeof(u32))
group_allocated =
dd->port->cmds_to_issue[n/2] >> (32*(n&1));
else
group_allocated = dd->port->cmds_to_issue[n];
size += sprintf(&buf[size], "%08X ", group_allocated);
}
size += sprintf(&buf[size], "]\n");
*offset = size <= len ? size : len;
size = copy_to_user(ubuf, buf, *offset);
if (size)
rv = -EFAULT;
kfree(buf);
return rv ? rv : *offset;
}
static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf,
size_t len, loff_t *offset)
{
struct driver_data *dd = (struct driver_data *)f->private_data;
char *buf;
int size = *offset;
int rv = 0;
if (!len || size)
return 0;
buf = kzalloc(MTIP_DFS_MAX_BUF_SIZE, GFP_KERNEL);
if (!buf) {
dev_err(&dd->pdev->dev,
"Memory allocation: flag buffer\n");
return -ENOMEM;
}
size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n",
dd->port->flags);
size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n",
dd->dd_flag);
*offset = size <= len ? size : len;
size = copy_to_user(ubuf, buf, *offset);
if (size)
rv = -EFAULT;
kfree(buf);
return rv ? rv : *offset;
}
static const struct file_operations mtip_device_status_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = mtip_hw_read_device_status,
.llseek = no_llseek,
};
static const struct file_operations mtip_regs_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = mtip_hw_read_registers,
.llseek = no_llseek,
};
static const struct file_operations mtip_flags_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = mtip_hw_read_flags,
.llseek = no_llseek,
};
/*
* Create the sysfs related attributes.
*
* @dd Pointer to the driver data structure.
* @kobj Pointer to the kobj for the block device.
*
* return value
* 0 Operation completed successfully.
* -EINVAL Invalid parameter.
*/
static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj)
{
if (!kobj || !dd)
return -EINVAL;
if (sysfs_create_file(kobj, &dev_attr_status.attr))
dev_warn(&dd->pdev->dev,
"Error creating 'status' sysfs entry\n");
return 0;
}
/*
* Remove the sysfs related attributes.
*
* @dd Pointer to the driver data structure.
* @kobj Pointer to the kobj for the block device.
*
* return value
* 0 Operation completed successfully.
* -EINVAL Invalid parameter.
*/
static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj)
{
if (!kobj || !dd)
return -EINVAL;
sysfs_remove_file(kobj, &dev_attr_status.attr);
return 0;
}
static int mtip_hw_debugfs_init(struct driver_data *dd)
{
if (!dfs_parent)
return -1;
dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent);
if (IS_ERR_OR_NULL(dd->dfs_node)) {
dev_warn(&dd->pdev->dev,
"Error creating node %s under debugfs\n",
dd->disk->disk_name);
dd->dfs_node = NULL;
return -1;
}
debugfs_create_file("flags", S_IRUGO, dd->dfs_node, dd,
&mtip_flags_fops);
debugfs_create_file("registers", S_IRUGO, dd->dfs_node, dd,
&mtip_regs_fops);
return 0;
}
static void mtip_hw_debugfs_exit(struct driver_data *dd)
{
if (dd->dfs_node)
debugfs_remove_recursive(dd->dfs_node);
}
static int mtip_free_orphan(struct driver_data *dd)
{
struct kobject *kobj;
if (dd->bdev) {
if (dd->bdev->bd_holders >= 1)
return -2;
bdput(dd->bdev);
dd->bdev = NULL;
}
mtip_hw_debugfs_exit(dd);
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, dd->index);
spin_unlock(&rssd_index_lock);
if (!test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag) &&
test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag)) {
put_disk(dd->disk);
} else {
if (dd->disk) {
kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
if (kobj) {
mtip_hw_sysfs_exit(dd, kobj);
kobject_put(kobj);
}
del_gendisk(dd->disk);
dd->disk = NULL;
}
if (dd->queue) {
dd->queue->queuedata = NULL;
blk_cleanup_queue(dd->queue);
blk_mq_free_tag_set(&dd->tags);
dd->queue = NULL;
}
}
kfree(dd);
return 0;
}
/*
* Perform any init/resume time hardware setup
*
* @dd Pointer to the driver data structure.
*
* return value
* None
*/
static inline void hba_setup(struct driver_data *dd)
{
u32 hwdata;
hwdata = readl(dd->mmio + HOST_HSORG);
/* interrupt bug workaround: use only 1 IS bit.*/
writel(hwdata |
HSORG_DISABLE_SLOTGRP_INTR |
HSORG_DISABLE_SLOTGRP_PXIS,
dd->mmio + HOST_HSORG);
}
static int mtip_device_unaligned_constrained(struct driver_data *dd)
{
return (dd->pdev->device == P420M_DEVICE_ID ? 1 : 0);
}
/*
* Detect the details of the product, and store anything needed
* into the driver data structure. This includes product type and
* version and number of slot groups.
*
* @dd Pointer to the driver data structure.
*
* return value
* None
*/
static void mtip_detect_product(struct driver_data *dd)
{
u32 hwdata;
unsigned int rev, slotgroups;
/*
* HBA base + 0xFC [15:0] - vendor-specific hardware interface
* info register:
* [15:8] hardware/software interface rev#
* [ 3] asic-style interface
* [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
*/
hwdata = readl(dd->mmio + HOST_HSORG);
dd->product_type = MTIP_PRODUCT_UNKNOWN;
dd->slot_groups = 1;
if (hwdata & 0x8) {
dd->product_type = MTIP_PRODUCT_ASICFPGA;
rev = (hwdata & HSORG_HWREV) >> 8;
slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1;
dev_info(&dd->pdev->dev,
"ASIC-FPGA design, HS rev 0x%x, "
"%i slot groups [%i slots]\n",
rev,
slotgroups,
slotgroups * 32);
if (slotgroups > MTIP_MAX_SLOT_GROUPS) {
dev_warn(&dd->pdev->dev,
"Warning: driver only supports "
"%i slot groups.\n", MTIP_MAX_SLOT_GROUPS);
slotgroups = MTIP_MAX_SLOT_GROUPS;
}
dd->slot_groups = slotgroups;
return;
}
dev_warn(&dd->pdev->dev, "Unrecognized product id\n");
}
/*
* Blocking wait for FTL rebuild to complete
*
* @dd Pointer to the DRIVER_DATA structure.
*
* return value
* 0 FTL rebuild completed successfully
* -EFAULT FTL rebuild error/timeout/interruption
*/
static int mtip_ftl_rebuild_poll(struct driver_data *dd)
{
unsigned long timeout, cnt = 0, start;
dev_warn(&dd->pdev->dev,
"FTL rebuild in progress. Polling for completion.\n");
start = jiffies;
timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS);
do {
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
&dd->dd_flag)))
return -EFAULT;
if (mtip_check_surprise_removal(dd->pdev))
return -EFAULT;
if (mtip_get_identify(dd->port, NULL) < 0)
return -EFAULT;
if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
MTIP_FTL_REBUILD_MAGIC) {
ssleep(1);
/* Print message every 3 minutes */
if (cnt++ >= 180) {
dev_warn(&dd->pdev->dev,
"FTL rebuild in progress (%d secs).\n",
jiffies_to_msecs(jiffies - start) / 1000);
cnt = 0;
}
} else {
dev_warn(&dd->pdev->dev,
"FTL rebuild complete (%d secs).\n",
jiffies_to_msecs(jiffies - start) / 1000);
mtip_block_initialize(dd);
return 0;
}
ssleep(10);
} while (time_before(jiffies, timeout));
/* Check for timeout */
dev_err(&dd->pdev->dev,
"Timed out waiting for FTL rebuild to complete (%d secs).\n",
jiffies_to_msecs(jiffies - start) / 1000);
return -EFAULT;
}
/*
* service thread to issue queued commands
*
* @data Pointer to the driver data structure.
*
* return value
* 0
*/
static int mtip_service_thread(void *data)
{
struct driver_data *dd = (struct driver_data *)data;
unsigned long slot, slot_start, slot_wrap;
unsigned int num_cmd_slots = dd->slot_groups * 32;
struct mtip_port *port = dd->port;
int ret;
while (1) {
if (kthread_should_stop() ||
test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
goto st_out;
clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
/*
* the condition is to check neither an internal command is
* is in progress nor error handling is active
*/
wait_event_interruptible(port->svc_wait, (port->flags) &&
!(port->flags & MTIP_PF_PAUSE_IO));
set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
if (kthread_should_stop() ||
test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
goto st_out;
/* If I am an orphan, start self cleanup */
if (test_bit(MTIP_PF_SR_CLEANUP_BIT, &port->flags))
break;
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
&dd->dd_flag)))
goto st_out;
restart_eh:
/* Demux bits: start with error handling */
if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags)) {
mtip_handle_tfe(dd);
clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
}
if (test_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags))
goto restart_eh;
if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
slot = 1;
/* used to restrict the loop to one iteration */
slot_start = num_cmd_slots;
slot_wrap = 0;
while (1) {
slot = find_next_bit(port->cmds_to_issue,
num_cmd_slots, slot);
if (slot_wrap == 1) {
if ((slot_start >= slot) ||
(slot >= num_cmd_slots))
break;
}
if (unlikely(slot_start == num_cmd_slots))
slot_start = slot;
if (unlikely(slot == num_cmd_slots)) {
slot = 1;
slot_wrap = 1;
continue;
}
/* Issue the command to the hardware */
mtip_issue_ncq_command(port, slot);
clear_bit(slot, port->cmds_to_issue);
}
clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
}
if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) {
if (mtip_ftl_rebuild_poll(dd) < 0)
set_bit(MTIP_DDF_REBUILD_FAILED_BIT,
&dd->dd_flag);
clear_bit(MTIP_PF_REBUILD_BIT, &port->flags);
}
}
/* wait for pci remove to exit */
while (1) {
if (test_bit(MTIP_DDF_REMOVE_DONE_BIT, &dd->dd_flag))
break;
msleep_interruptible(1000);
if (kthread_should_stop())
goto st_out;
}
while (1) {
ret = mtip_free_orphan(dd);
if (!ret) {
/* NOTE: All data structures are invalid, do not
* access any here */
return 0;
}
msleep_interruptible(1000);
if (kthread_should_stop())
goto st_out;
}
st_out:
return 0;
}
/*
* DMA region teardown
*
* @dd Pointer to driver_data structure
*
* return value
* None
*/
static void mtip_dma_free(struct driver_data *dd)
{
struct mtip_port *port = dd->port;
if (port->block1)
dmam_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
port->block1, port->block1_dma);
if (port->command_list) {
dmam_free_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ,
port->command_list, port->command_list_dma);
}
}
/*
* DMA region setup
*
* @dd Pointer to driver_data structure
*
* return value
* -ENOMEM Not enough free DMA region space to initialize driver
*/
static int mtip_dma_alloc(struct driver_data *dd)
{
struct mtip_port *port = dd->port;
/* Allocate dma memory for RX Fis, Identify, and Sector Bufffer */
port->block1 =
dmam_alloc_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
&port->block1_dma, GFP_KERNEL);
if (!port->block1)
return -ENOMEM;
memset(port->block1, 0, BLOCK_DMA_ALLOC_SZ);
/* Allocate dma memory for command list */
port->command_list =
dmam_alloc_coherent(&dd->pdev->dev, AHCI_CMD_TBL_SZ,
&port->command_list_dma, GFP_KERNEL);
if (!port->command_list) {
dmam_free_coherent(&dd->pdev->dev, BLOCK_DMA_ALLOC_SZ,
port->block1, port->block1_dma);
port->block1 = NULL;
port->block1_dma = 0;
return -ENOMEM;
}
memset(port->command_list, 0, AHCI_CMD_TBL_SZ);
/* Setup all pointers into first DMA region */
port->rxfis = port->block1 + AHCI_RX_FIS_OFFSET;
port->rxfis_dma = port->block1_dma + AHCI_RX_FIS_OFFSET;
port->identify = port->block1 + AHCI_IDFY_OFFSET;
port->identify_dma = port->block1_dma + AHCI_IDFY_OFFSET;
port->log_buf = port->block1 + AHCI_SECTBUF_OFFSET;
port->log_buf_dma = port->block1_dma + AHCI_SECTBUF_OFFSET;
port->smart_buf = port->block1 + AHCI_SMARTBUF_OFFSET;
port->smart_buf_dma = port->block1_dma + AHCI_SMARTBUF_OFFSET;
return 0;
}
static int mtip_hw_get_identify(struct driver_data *dd)
{
struct smart_attr attr242;
unsigned char *buf;
int rv;
if (mtip_get_identify(dd->port, NULL) < 0)
return -EFAULT;
if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
MTIP_FTL_REBUILD_MAGIC) {
set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags);
return MTIP_FTL_REBUILD_MAGIC;
}
mtip_dump_identify(dd->port);
/* check write protect, over temp and rebuild statuses */
rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
dd->port->log_buf,
dd->port->log_buf_dma, 1);
if (rv) {
dev_warn(&dd->pdev->dev,
"Error in READ LOG EXT (10h) command\n");
/* non-critical error, don't fail the load */
} else {
buf = (unsigned char *)dd->port->log_buf;
if (buf[259] & 0x1) {
dev_info(&dd->pdev->dev,
"Write protect bit is set.\n");
set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
}
if (buf[288] == 0xF7) {
dev_info(&dd->pdev->dev,
"Exceeded Tmax, drive in thermal shutdown.\n");
set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
}
if (buf[288] == 0xBF) {
dev_info(&dd->pdev->dev,
"Drive indicates rebuild has failed.\n");
/* TODO */
}
}
/* get write protect progess */
memset(&attr242, 0, sizeof(struct smart_attr));
if (mtip_get_smart_attr(dd->port, 242, &attr242))
dev_warn(&dd->pdev->dev,
"Unable to check write protect progress\n");
else
dev_info(&dd->pdev->dev,
"Write protect progress: %u%% (%u blocks)\n",
attr242.cur, le32_to_cpu(attr242.data));
return rv;
}
/*
* Called once for each card.
*
* @dd Pointer to the driver data structure.
*
* return value
* 0 on success, else an error code.
*/
static int mtip_hw_init(struct driver_data *dd)
{
int i;
int rv;
unsigned int num_command_slots;
unsigned long timeout, timetaken;
dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR];
mtip_detect_product(dd);
if (dd->product_type == MTIP_PRODUCT_UNKNOWN) {
rv = -EIO;
goto out1;
}
num_command_slots = dd->slot_groups * 32;
hba_setup(dd);
dd->port = kzalloc_node(sizeof(struct mtip_port), GFP_KERNEL,
dd->numa_node);
if (!dd->port) {
dev_err(&dd->pdev->dev,
"Memory allocation: port structure\n");
return -ENOMEM;
}
/* Continue workqueue setup */
for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
dd->work[i].port = dd->port;
/* Enable unaligned IO constraints for some devices */
if (mtip_device_unaligned_constrained(dd))
dd->unal_qdepth = MTIP_MAX_UNALIGNED_SLOTS;
else
dd->unal_qdepth = 0;
sema_init(&dd->port->cmd_slot_unal, dd->unal_qdepth);
/* Spinlock to prevent concurrent issue */
for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
spin_lock_init(&dd->port->cmd_issue_lock[i]);
/* Set the port mmio base address. */
dd->port->mmio = dd->mmio + PORT_OFFSET;
dd->port->dd = dd;
/* DMA allocations */
rv = mtip_dma_alloc(dd);
if (rv < 0)
goto out1;
/* Setup the pointers to the extended s_active and CI registers. */
for (i = 0; i < dd->slot_groups; i++) {
dd->port->s_active[i] =
dd->port->mmio + i*0x80 + PORT_SCR_ACT;
dd->port->cmd_issue[i] =
dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE;
dd->port->completed[i] =
dd->port->mmio + i*0x80 + PORT_SDBV;
}
timetaken = jiffies;
timeout = jiffies + msecs_to_jiffies(30000);
while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) &&
time_before(jiffies, timeout)) {
mdelay(100);
}
if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
timetaken = jiffies - timetaken;
dev_warn(&dd->pdev->dev,
"Surprise removal detected at %u ms\n",
jiffies_to_msecs(timetaken));
rv = -ENODEV;
goto out2 ;
}
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) {
timetaken = jiffies - timetaken;
dev_warn(&dd->pdev->dev,
"Removal detected at %u ms\n",
jiffies_to_msecs(timetaken));
rv = -EFAULT;
goto out2;
}
/* Conditionally reset the HBA. */
if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) {
if (mtip_hba_reset(dd) < 0) {
dev_err(&dd->pdev->dev,
"Card did not reset within timeout\n");
rv = -EIO;
goto out2;
}
} else {
/* Clear any pending interrupts on the HBA */
writel(readl(dd->mmio + HOST_IRQ_STAT),
dd->mmio + HOST_IRQ_STAT);
}
mtip_init_port(dd->port);
mtip_start_port(dd->port);
/* Setup the ISR and enable interrupts. */
rv = devm_request_irq(&dd->pdev->dev,
dd->pdev->irq,
mtip_irq_handler,
IRQF_SHARED,
dev_driver_string(&dd->pdev->dev),
dd);
if (rv) {
dev_err(&dd->pdev->dev,
"Unable to allocate IRQ %d\n", dd->pdev->irq);
goto out2;
}
irq_set_affinity_hint(dd->pdev->irq, get_cpu_mask(dd->isr_binding));
/* Enable interrupts on the HBA. */
writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
dd->mmio + HOST_CTL);
init_waitqueue_head(&dd->port->svc_wait);
if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
rv = -EFAULT;
goto out3;
}
return rv;
out3:
/* Disable interrupts on the HBA. */
writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
dd->mmio + HOST_CTL);
/* Release the IRQ. */
irq_set_affinity_hint(dd->pdev->irq, NULL);
devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
out2:
mtip_deinit_port(dd->port);
mtip_dma_free(dd);
out1:
/* Free the memory allocated for the for structure. */
kfree(dd->port);
return rv;
}
static void mtip_standby_drive(struct driver_data *dd)
{
if (dd->sr)
return;
/*
* Send standby immediate (E0h) to the drive so that it
* saves its state.
*/
if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags) &&
!test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag))
if (mtip_standby_immediate(dd->port))
dev_warn(&dd->pdev->dev,
"STANDBY IMMEDIATE failed\n");
}
/*
* Called to deinitialize an interface.
*
* @dd Pointer to the driver data structure.
*
* return value
* 0
*/
static int mtip_hw_exit(struct driver_data *dd)
{
/*
* Send standby immediate (E0h) to the drive so that it
* saves its state.
*/
if (!dd->sr) {
/* de-initialize the port. */
mtip_deinit_port(dd->port);
/* Disable interrupts on the HBA. */
writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
dd->mmio + HOST_CTL);
}
/* Release the IRQ. */
irq_set_affinity_hint(dd->pdev->irq, NULL);
devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
/* Free dma regions */
mtip_dma_free(dd);
/* Free the memory allocated for the for structure. */
kfree(dd->port);
dd->port = NULL;
return 0;
}
/*
* Issue a Standby Immediate command to the device.
*
* This function is called by the Block Layer just before the
* system powers off during a shutdown.
*
* @dd Pointer to the driver data structure.
*
* return value
* 0
*/
static int mtip_hw_shutdown(struct driver_data *dd)
{
/*
* Send standby immediate (E0h) to the drive so that it
* saves its state.
*/
if (!dd->sr && dd->port)
mtip_standby_immediate(dd->port);
return 0;
}
/*
* Suspend function
*
* This function is called by the Block Layer just before the
* system hibernates.
*
* @dd Pointer to the driver data structure.
*
* return value
* 0 Suspend was successful
* -EFAULT Suspend was not successful
*/
static int mtip_hw_suspend(struct driver_data *dd)
{
/*
* Send standby immediate (E0h) to the drive
* so that it saves its state.
*/
if (mtip_standby_immediate(dd->port) != 0) {
dev_err(&dd->pdev->dev,
"Failed standby-immediate command\n");
return -EFAULT;
}
/* Disable interrupts on the HBA.*/
writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
dd->mmio + HOST_CTL);
mtip_deinit_port(dd->port);
return 0;
}
/*
* Resume function
*
* This function is called by the Block Layer as the
* system resumes.
*
* @dd Pointer to the driver data structure.
*
* return value
* 0 Resume was successful
* -EFAULT Resume was not successful
*/
static int mtip_hw_resume(struct driver_data *dd)
{
/* Perform any needed hardware setup steps */
hba_setup(dd);
/* Reset the HBA */
if (mtip_hba_reset(dd) != 0) {
dev_err(&dd->pdev->dev,
"Unable to reset the HBA\n");
return -EFAULT;
}
/*
* Enable the port, DMA engine, and FIS reception specific
* h/w in controller.
*/
mtip_init_port(dd->port);
mtip_start_port(dd->port);
/* Enable interrupts on the HBA.*/
writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
dd->mmio + HOST_CTL);
return 0;
}
/*
* Helper function for reusing disk name
* upon hot insertion.
*/
static int rssd_disk_name_format(char *prefix,
int index,
char *buf,
int buflen)
{
const int base = 'z' - 'a' + 1;
char *begin = buf + strlen(prefix);
char *end = buf + buflen;
char *p;
int unit;
p = end - 1;
*p = '\0';
unit = base;
do {
if (p == begin)
return -EINVAL;
*--p = 'a' + (index % unit);
index = (index / unit) - 1;
} while (index >= 0);
memmove(begin, p, end - p);
memcpy(buf, prefix, strlen(prefix));
return 0;
}
/*
* Block layer IOCTL handler.
*
* @dev Pointer to the block_device structure.
* @mode ignored
* @cmd IOCTL command passed from the user application.
* @arg Argument passed from the user application.
*
* return value
* 0 IOCTL completed successfully.
* -ENOTTY IOCTL not supported or invalid driver data
* structure pointer.
*/
static int mtip_block_ioctl(struct block_device *dev,
fmode_t mode,
unsigned cmd,
unsigned long arg)
{
struct driver_data *dd = dev->bd_disk->private_data;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (!dd)
return -ENOTTY;
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
return -ENOTTY;
switch (cmd) {
case BLKFLSBUF:
return -ENOTTY;
default:
return mtip_hw_ioctl(dd, cmd, arg);
}
}
#ifdef CONFIG_COMPAT
/*
* Block layer compat IOCTL handler.
*
* @dev Pointer to the block_device structure.
* @mode ignored
* @cmd IOCTL command passed from the user application.
* @arg Argument passed from the user application.
*
* return value
* 0 IOCTL completed successfully.
* -ENOTTY IOCTL not supported or invalid driver data
* structure pointer.
*/
static int mtip_block_compat_ioctl(struct block_device *dev,
fmode_t mode,
unsigned cmd,
unsigned long arg)
{
struct driver_data *dd = dev->bd_disk->private_data;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (!dd)
return -ENOTTY;
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
return -ENOTTY;
switch (cmd) {
case BLKFLSBUF:
return -ENOTTY;
case HDIO_DRIVE_TASKFILE: {
struct mtip_compat_ide_task_request_s __user *compat_req_task;
ide_task_request_t req_task;
int compat_tasksize, outtotal, ret;
compat_tasksize =
sizeof(struct mtip_compat_ide_task_request_s);
compat_req_task =
(struct mtip_compat_ide_task_request_s __user *) arg;
if (copy_from_user(&req_task, (void __user *) arg,
compat_tasksize - (2 * sizeof(compat_long_t))))
return -EFAULT;
if (get_user(req_task.out_size, &compat_req_task->out_size))
return -EFAULT;
if (get_user(req_task.in_size, &compat_req_task->in_size))
return -EFAULT;
outtotal = sizeof(struct mtip_compat_ide_task_request_s);
ret = exec_drive_taskfile(dd, (void __user *) arg,
&req_task, outtotal);
if (copy_to_user((void __user *) arg, &req_task,
compat_tasksize -
(2 * sizeof(compat_long_t))))
return -EFAULT;
if (put_user(req_task.out_size, &compat_req_task->out_size))
return -EFAULT;
if (put_user(req_task.in_size, &compat_req_task->in_size))
return -EFAULT;
return ret;
}
default:
return mtip_hw_ioctl(dd, cmd, arg);
}
}
#endif
/*
* Obtain the geometry of the device.
*
* You may think that this function is obsolete, but some applications,
* fdisk for example still used CHS values. This function describes the
* device as having 224 heads and 56 sectors per cylinder. These values are
* chosen so that each cylinder is aligned on a 4KB boundary. Since a
* partition is described in terms of a start and end cylinder this means
* that each partition is also 4KB aligned. Non-aligned partitions adversely
* affects performance.
*
* @dev Pointer to the block_device strucutre.
* @geo Pointer to a hd_geometry structure.
*
* return value
* 0 Operation completed successfully.
* -ENOTTY An error occurred while reading the drive capacity.
*/
static int mtip_block_getgeo(struct block_device *dev,
struct hd_geometry *geo)
{
struct driver_data *dd = dev->bd_disk->private_data;
sector_t capacity;
if (!dd)
return -ENOTTY;
if (!(mtip_hw_get_capacity(dd, &capacity))) {
dev_warn(&dd->pdev->dev,
"Could not get drive capacity.\n");
return -ENOTTY;
}
geo->heads = 224;
geo->sectors = 56;
sector_div(capacity, (geo->heads * geo->sectors));
geo->cylinders = capacity;
return 0;
}
/*
* Block device operation function.
*
* This structure contains pointers to the functions required by the block
* layer.
*/
static const struct block_device_operations mtip_block_ops = {
.ioctl = mtip_block_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = mtip_block_compat_ioctl,
#endif
.getgeo = mtip_block_getgeo,
.owner = THIS_MODULE
};
/*
* Block layer make request function.
*
* This function is called by the kernel to process a BIO for
* the P320 device.
*
* @queue Pointer to the request queue. Unused other than to obtain
* the driver data structure.
* @rq Pointer to the request.
*
*/
static int mtip_submit_request(struct blk_mq_hw_ctx *hctx, struct request *rq)
{
struct driver_data *dd = hctx->queue->queuedata;
struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
unsigned int nents;
if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) {
if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
&dd->dd_flag))) {
return -ENXIO;
}
if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))) {
return -ENODATA;
}
if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT,
&dd->dd_flag) &&
rq_data_dir(rq))) {
return -ENODATA;
}
if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag)))
return -ENODATA;
if (test_bit(MTIP_DDF_REBUILD_FAILED_BIT, &dd->dd_flag))
return -ENXIO;
}
if (rq->cmd_flags & REQ_DISCARD) {
int err;
err = mtip_send_trim(dd, blk_rq_pos(rq), blk_rq_sectors(rq));
blk_mq_end_request(rq, err);
return 0;
}
/* Create the scatter list for this request. */
nents = blk_rq_map_sg(hctx->queue, rq, cmd->sg);
/* Issue the read/write. */
mtip_hw_submit_io(dd, rq, cmd, nents, hctx);
return 0;
}
static bool mtip_check_unal_depth(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
struct driver_data *dd = hctx->queue->queuedata;
struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
if (rq_data_dir(rq) == READ || !dd->unal_qdepth)
return false;
/*
* If unaligned depth must be limited on this controller, mark it
* as unaligned if the IO isn't on a 4k boundary (start of length).
*/
if (blk_rq_sectors(rq) <= 64) {
if ((blk_rq_pos(rq) & 7) || (blk_rq_sectors(rq) & 7))
cmd->unaligned = 1;
}
if (cmd->unaligned && down_trylock(&dd->port->cmd_slot_unal))
return true;
return false;
}
static int mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
{
struct request *rq = bd->rq;
int ret;
if (unlikely(mtip_check_unal_depth(hctx, rq)))
return BLK_MQ_RQ_QUEUE_BUSY;
blk_mq_start_request(rq);
ret = mtip_submit_request(hctx, rq);
if (likely(!ret))
return BLK_MQ_RQ_QUEUE_OK;
rq->errors = ret;
return BLK_MQ_RQ_QUEUE_ERROR;
}
static void mtip_free_cmd(void *data, struct request *rq,
unsigned int hctx_idx, unsigned int request_idx)
{
struct driver_data *dd = data;
struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
if (!cmd->command)
return;
dmam_free_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ,
cmd->command, cmd->command_dma);
}
static int mtip_init_cmd(void *data, struct request *rq, unsigned int hctx_idx,
unsigned int request_idx, unsigned int numa_node)
{
struct driver_data *dd = data;
struct mtip_cmd *cmd = blk_mq_rq_to_pdu(rq);
u32 host_cap_64 = readl(dd->mmio + HOST_CAP) & HOST_CAP_64;
cmd->command = dmam_alloc_coherent(&dd->pdev->dev, CMD_DMA_ALLOC_SZ,
&cmd->command_dma, GFP_KERNEL);
if (!cmd->command)
return -ENOMEM;
memset(cmd->command, 0, CMD_DMA_ALLOC_SZ);
/* Point the command headers at the command tables. */
cmd->command_header = dd->port->command_list +
(sizeof(struct mtip_cmd_hdr) * request_idx);
cmd->command_header_dma = dd->port->command_list_dma +
(sizeof(struct mtip_cmd_hdr) * request_idx);
if (host_cap_64)
cmd->command_header->ctbau = __force_bit2int cpu_to_le32((cmd->command_dma >> 16) >> 16);
cmd->command_header->ctba = __force_bit2int cpu_to_le32(cmd->command_dma & 0xFFFFFFFF);
sg_init_table(cmd->sg, MTIP_MAX_SG);
return 0;
}
static struct blk_mq_ops mtip_mq_ops = {
.queue_rq = mtip_queue_rq,
.map_queue = blk_mq_map_queue,
.init_request = mtip_init_cmd,
.exit_request = mtip_free_cmd,
};
/*
* Block layer initialization function.
*
* This function is called once by the PCI layer for each P320
* device that is connected to the system.
*
* @dd Pointer to the driver data structure.
*
* return value
* 0 on success else an error code.
*/
static int mtip_block_initialize(struct driver_data *dd)
{
int rv = 0, wait_for_rebuild = 0;
sector_t capacity;
unsigned int index = 0;
struct kobject *kobj;
unsigned char thd_name[16];
if (dd->disk)
goto skip_create_disk; /* hw init done, before rebuild */
if (mtip_hw_init(dd)) {
rv = -EINVAL;
goto protocol_init_error;
}
dd->disk = alloc_disk_node(MTIP_MAX_MINORS, dd->numa_node);
if (dd->disk == NULL) {
dev_err(&dd->pdev->dev,
"Unable to allocate gendisk structure\n");
rv = -EINVAL;
goto alloc_disk_error;
}
/* Generate the disk name, implemented same as in sd.c */
do {
if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL))
goto ida_get_error;
spin_lock(&rssd_index_lock);
rv = ida_get_new(&rssd_index_ida, &index);
spin_unlock(&rssd_index_lock);
} while (rv == -EAGAIN);
if (rv)
goto ida_get_error;
rv = rssd_disk_name_format("rssd",
index,
dd->disk->disk_name,
DISK_NAME_LEN);
if (rv)
goto disk_index_error;
dd->disk->driverfs_dev = &dd->pdev->dev;
dd->disk->major = dd->major;
dd->disk->first_minor = dd->instance * MTIP_MAX_MINORS;
dd->disk->fops = &mtip_block_ops;
dd->disk->private_data = dd;
dd->index = index;
mtip_hw_debugfs_init(dd);
skip_create_disk:
memset(&dd->tags, 0, sizeof(dd->tags));
dd->tags.ops = &mtip_mq_ops;
dd->tags.nr_hw_queues = 1;
dd->tags.queue_depth = MTIP_MAX_COMMAND_SLOTS;
dd->tags.reserved_tags = 1;
dd->tags.cmd_size = sizeof(struct mtip_cmd);
dd->tags.numa_node = dd->numa_node;
dd->tags.flags = BLK_MQ_F_SHOULD_MERGE;
dd->tags.driver_data = dd;
rv = blk_mq_alloc_tag_set(&dd->tags);
if (rv) {
dev_err(&dd->pdev->dev,
"Unable to allocate request queue\n");
goto block_queue_alloc_init_error;
}
/* Allocate the request queue. */
dd->queue = blk_mq_init_queue(&dd->tags);
if (IS_ERR(dd->queue)) {
dev_err(&dd->pdev->dev,
"Unable to allocate request queue\n");
rv = -ENOMEM;
goto block_queue_alloc_init_error;
}
dd->disk->queue = dd->queue;
dd->queue->queuedata = dd;
/* Initialize the protocol layer. */
wait_for_rebuild = mtip_hw_get_identify(dd);
if (wait_for_rebuild < 0) {
dev_err(&dd->pdev->dev,
"Protocol layer initialization failed\n");
rv = -EINVAL;
goto init_hw_cmds_error;
}
/*
* if rebuild pending, start the service thread, and delay the block
* queue creation and add_disk()
*/
if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
goto start_service_thread;
/* Set device limits. */
set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags);
clear_bit(QUEUE_FLAG_ADD_RANDOM, &dd->queue->queue_flags);
blk_queue_max_segments(dd->queue, MTIP_MAX_SG);
blk_queue_physical_block_size(dd->queue, 4096);
blk_queue_max_hw_sectors(dd->queue, 0xffff);
blk_queue_max_segment_size(dd->queue, 0x400000);
blk_queue_io_min(dd->queue, 4096);
blk_queue_bounce_limit(dd->queue, dd->pdev->dma_mask);
/*
* write back cache is not supported in the device. FUA depends on
* write back cache support, hence setting flush support to zero.
*/
blk_queue_flush(dd->queue, 0);
/* Signal trim support */
if (dd->trim_supp == true) {
set_bit(QUEUE_FLAG_DISCARD, &dd->queue->queue_flags);
dd->queue->limits.discard_granularity = 4096;
blk_queue_max_discard_sectors(dd->queue,
MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES);
dd->queue->limits.discard_zeroes_data = 0;
}
/* Set the capacity of the device in 512 byte sectors. */
if (!(mtip_hw_get_capacity(dd, &capacity))) {
dev_warn(&dd->pdev->dev,
"Could not read drive capacity\n");
rv = -EIO;
goto read_capacity_error;
}
set_capacity(dd->disk, capacity);
/* Enable the block device and add it to /dev */
add_disk(dd->disk);
dd->bdev = bdget_disk(dd->disk, 0);
/*
* Now that the disk is active, initialize any sysfs attributes
* managed by the protocol layer.
*/
kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
if (kobj) {
mtip_hw_sysfs_init(dd, kobj);
kobject_put(kobj);
}
if (dd->mtip_svc_handler) {
set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
return rv; /* service thread created for handling rebuild */
}
start_service_thread:
sprintf(thd_name, "mtip_svc_thd_%02d", index);
dd->mtip_svc_handler = kthread_create_on_node(mtip_service_thread,
dd, dd->numa_node, "%s",
thd_name);
if (IS_ERR(dd->mtip_svc_handler)) {
dev_err(&dd->pdev->dev, "service thread failed to start\n");
dd->mtip_svc_handler = NULL;
rv = -EFAULT;
goto kthread_run_error;
}
wake_up_process(dd->mtip_svc_handler);
if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
rv = wait_for_rebuild;
return rv;
kthread_run_error:
bdput(dd->bdev);
dd->bdev = NULL;
/* Delete our gendisk. This also removes the device from /dev */
del_gendisk(dd->disk);
read_capacity_error:
init_hw_cmds_error:
blk_cleanup_queue(dd->queue);
blk_mq_free_tag_set(&dd->tags);
block_queue_alloc_init_error:
mtip_hw_debugfs_exit(dd);
disk_index_error:
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, index);
spin_unlock(&rssd_index_lock);
ida_get_error:
put_disk(dd->disk);
alloc_disk_error:
mtip_hw_exit(dd); /* De-initialize the protocol layer. */
protocol_init_error:
return rv;
}
/*
* Block layer deinitialization function.
*
* Called by the PCI layer as each P320 device is removed.
*
* @dd Pointer to the driver data structure.
*
* return value
* 0
*/
static int mtip_block_remove(struct driver_data *dd)
{
struct kobject *kobj;
if (!dd->sr) {
mtip_hw_debugfs_exit(dd);
if (dd->mtip_svc_handler) {
set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
wake_up_interruptible(&dd->port->svc_wait);
kthread_stop(dd->mtip_svc_handler);
}
/* Clean up the sysfs attributes, if created */
if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
if (kobj) {
mtip_hw_sysfs_exit(dd, kobj);
kobject_put(kobj);
}
}
mtip_standby_drive(dd);
/*
* Delete our gendisk structure. This also removes the device
* from /dev
*/
if (dd->bdev) {
bdput(dd->bdev);
dd->bdev = NULL;
}
if (dd->disk) {
if (dd->disk->queue) {
del_gendisk(dd->disk);
blk_cleanup_queue(dd->queue);
blk_mq_free_tag_set(&dd->tags);
dd->queue = NULL;
} else
put_disk(dd->disk);
}
dd->disk = NULL;
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, dd->index);
spin_unlock(&rssd_index_lock);
} else {
dev_info(&dd->pdev->dev, "device %s surprise removal\n",
dd->disk->disk_name);
}
/* De-initialize the protocol layer. */
mtip_hw_exit(dd);
return 0;
}
/*
* Function called by the PCI layer when just before the
* machine shuts down.
*
* If a protocol layer shutdown function is present it will be called
* by this function.
*
* @dd Pointer to the driver data structure.
*
* return value
* 0
*/
static int mtip_block_shutdown(struct driver_data *dd)
{
mtip_hw_shutdown(dd);
/* Delete our gendisk structure, and cleanup the blk queue. */
if (dd->disk) {
dev_info(&dd->pdev->dev,
"Shutting down %s ...\n", dd->disk->disk_name);
if (dd->disk->queue) {
del_gendisk(dd->disk);
blk_cleanup_queue(dd->queue);
blk_mq_free_tag_set(&dd->tags);
} else
put_disk(dd->disk);
dd->disk = NULL;
dd->queue = NULL;
}
spin_lock(&rssd_index_lock);
ida_remove(&rssd_index_ida, dd->index);
spin_unlock(&rssd_index_lock);
return 0;
}
static int mtip_block_suspend(struct driver_data *dd)
{
dev_info(&dd->pdev->dev,
"Suspending %s ...\n", dd->disk->disk_name);
mtip_hw_suspend(dd);
return 0;
}
static int mtip_block_resume(struct driver_data *dd)
{
dev_info(&dd->pdev->dev, "Resuming %s ...\n",
dd->disk->disk_name);
mtip_hw_resume(dd);
return 0;
}
static void drop_cpu(int cpu)
{
cpu_use[cpu]--;
}
static int get_least_used_cpu_on_node(int node)
{
int cpu, least_used_cpu, least_cnt;
const struct cpumask *node_mask;
node_mask = cpumask_of_node(node);
least_used_cpu = cpumask_first(node_mask);
least_cnt = cpu_use[least_used_cpu];
cpu = least_used_cpu;
for_each_cpu(cpu, node_mask) {
if (cpu_use[cpu] < least_cnt) {
least_used_cpu = cpu;
least_cnt = cpu_use[cpu];
}
}
cpu_use[least_used_cpu]++;
return least_used_cpu;
}
/* Helper for selecting a node in round robin mode */
static inline int mtip_get_next_rr_node(void)
{
static int next_node = -1;
if (next_node == -1) {
next_node = first_online_node;
return next_node;
}
next_node = next_online_node(next_node);
if (next_node == MAX_NUMNODES)
next_node = first_online_node;
return next_node;
}
static DEFINE_HANDLER(0);
static DEFINE_HANDLER(1);
static DEFINE_HANDLER(2);
static DEFINE_HANDLER(3);
static DEFINE_HANDLER(4);
static DEFINE_HANDLER(5);
static DEFINE_HANDLER(6);
static DEFINE_HANDLER(7);
static void mtip_disable_link_opts(struct driver_data *dd, struct pci_dev *pdev)
{
int pos;
unsigned short pcie_dev_ctrl;
pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
if (pos) {
pci_read_config_word(pdev,
pos + PCI_EXP_DEVCTL,
&pcie_dev_ctrl);
if (pcie_dev_ctrl & (1 << 11) ||
pcie_dev_ctrl & (1 << 4)) {
dev_info(&dd->pdev->dev,
"Disabling ERO/No-Snoop on bridge device %04x:%04x\n",
pdev->vendor, pdev->device);
pcie_dev_ctrl &= ~(PCI_EXP_DEVCTL_NOSNOOP_EN |
PCI_EXP_DEVCTL_RELAX_EN);
pci_write_config_word(pdev,
pos + PCI_EXP_DEVCTL,
pcie_dev_ctrl);
}
}
}
static void mtip_fix_ero_nosnoop(struct driver_data *dd, struct pci_dev *pdev)
{
/*
* This workaround is specific to AMD/ATI chipset with a PCI upstream
* device with device id 0x5aXX
*/
if (pdev->bus && pdev->bus->self) {
if (pdev->bus->self->vendor == PCI_VENDOR_ID_ATI &&
((pdev->bus->self->device & 0xff00) == 0x5a00)) {
mtip_disable_link_opts(dd, pdev->bus->self);
} else {
/* Check further up the topology */
struct pci_dev *parent_dev = pdev->bus->self;
if (parent_dev->bus &&
parent_dev->bus->parent &&
parent_dev->bus->parent->self &&
parent_dev->bus->parent->self->vendor ==
PCI_VENDOR_ID_ATI &&
(parent_dev->bus->parent->self->device &
0xff00) == 0x5a00) {
mtip_disable_link_opts(dd,
parent_dev->bus->parent->self);
}
}
}
}
/*
* Called for each supported PCI device detected.
*
* This function allocates the private data structure, enables the
* PCI device and then calls the block layer initialization function.
*
* return value
* 0 on success else an error code.
*/
static int mtip_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int rv = 0;
struct driver_data *dd = NULL;
char cpu_list[256];
const struct cpumask *node_mask;
int cpu, i = 0, j = 0;
int my_node = NUMA_NO_NODE;
unsigned long flags;
/* Allocate memory for this devices private data. */
my_node = pcibus_to_node(pdev->bus);
if (my_node != NUMA_NO_NODE) {
if (!node_online(my_node))
my_node = mtip_get_next_rr_node();
} else {
dev_info(&pdev->dev, "Kernel not reporting proximity, choosing a node\n");
my_node = mtip_get_next_rr_node();
}
dev_info(&pdev->dev, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n",
my_node, pcibus_to_node(pdev->bus), dev_to_node(&pdev->dev),
cpu_to_node(raw_smp_processor_id()), raw_smp_processor_id());
dd = kzalloc_node(sizeof(struct driver_data), GFP_KERNEL, my_node);
if (dd == NULL) {
dev_err(&pdev->dev,
"Unable to allocate memory for driver data\n");
return -ENOMEM;
}
/* Attach the private data to this PCI device. */
pci_set_drvdata(pdev, dd);
rv = pcim_enable_device(pdev);
if (rv < 0) {
dev_err(&pdev->dev, "Unable to enable device\n");
goto iomap_err;
}
/* Map BAR5 to memory. */
rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME);
if (rv < 0) {
dev_err(&pdev->dev, "Unable to map regions\n");
goto iomap_err;
}
if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (rv) {
rv = pci_set_consistent_dma_mask(pdev,
DMA_BIT_MASK(32));
if (rv) {
dev_warn(&pdev->dev,
"64-bit DMA enable failed\n");
goto setmask_err;
}
}
}
/* Copy the info we may need later into the private data structure. */
dd->major = mtip_major;
dd->instance = instance;
dd->pdev = pdev;
dd->numa_node = my_node;
INIT_LIST_HEAD(&dd->online_list);
INIT_LIST_HEAD(&dd->remove_list);
memset(dd->workq_name, 0, 32);
snprintf(dd->workq_name, 31, "mtipq%d", dd->instance);
dd->isr_workq = create_workqueue(dd->workq_name);
if (!dd->isr_workq) {
dev_warn(&pdev->dev, "Can't create wq %d\n", dd->instance);
rv = -ENOMEM;
goto block_initialize_err;
}
memset(cpu_list, 0, sizeof(cpu_list));
node_mask = cpumask_of_node(dd->numa_node);
if (!cpumask_empty(node_mask)) {
for_each_cpu(cpu, node_mask)
{
snprintf(&cpu_list[j], 256 - j, "%d ", cpu);
j = strlen(cpu_list);
}
dev_info(&pdev->dev, "Node %d on package %d has %d cpu(s): %s\n",
dd->numa_node,
topology_physical_package_id(cpumask_first(node_mask)),
nr_cpus_node(dd->numa_node),
cpu_list);
} else
dev_dbg(&pdev->dev, "mtip32xx: node_mask empty\n");
dd->isr_binding = get_least_used_cpu_on_node(dd->numa_node);
dev_info(&pdev->dev, "Initial IRQ binding node:cpu %d:%d\n",
cpu_to_node(dd->isr_binding), dd->isr_binding);
/* first worker context always runs in ISR */
dd->work[0].cpu_binding = dd->isr_binding;
dd->work[1].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
dd->work[2].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
dd->work[3].cpu_binding = dd->work[0].cpu_binding;
dd->work[4].cpu_binding = dd->work[1].cpu_binding;
dd->work[5].cpu_binding = dd->work[2].cpu_binding;
dd->work[6].cpu_binding = dd->work[2].cpu_binding;
dd->work[7].cpu_binding = dd->work[1].cpu_binding;
/* Log the bindings */
for_each_present_cpu(cpu) {
memset(cpu_list, 0, sizeof(cpu_list));
for (i = 0, j = 0; i < MTIP_MAX_SLOT_GROUPS; i++) {
if (dd->work[i].cpu_binding == cpu) {
snprintf(&cpu_list[j], 256 - j, "%d ", i);
j = strlen(cpu_list);
}
}
if (j)
dev_info(&pdev->dev, "CPU %d: WQs %s\n", cpu, cpu_list);
}
INIT_WORK(&dd->work[0].work, mtip_workq_sdbf0);
INIT_WORK(&dd->work[1].work, mtip_workq_sdbf1);
INIT_WORK(&dd->work[2].work, mtip_workq_sdbf2);
INIT_WORK(&dd->work[3].work, mtip_workq_sdbf3);
INIT_WORK(&dd->work[4].work, mtip_workq_sdbf4);
INIT_WORK(&dd->work[5].work, mtip_workq_sdbf5);
INIT_WORK(&dd->work[6].work, mtip_workq_sdbf6);
INIT_WORK(&dd->work[7].work, mtip_workq_sdbf7);
pci_set_master(pdev);
rv = pci_enable_msi(pdev);
if (rv) {
dev_warn(&pdev->dev,
"Unable to enable MSI interrupt.\n");
goto msi_initialize_err;
}
mtip_fix_ero_nosnoop(dd, pdev);
/* Initialize the block layer. */
rv = mtip_block_initialize(dd);
if (rv < 0) {
dev_err(&pdev->dev,
"Unable to initialize block layer\n");
goto block_initialize_err;
}
/*
* Increment the instance count so that each device has a unique
* instance number.
*/
instance++;
if (rv != MTIP_FTL_REBUILD_MAGIC)
set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
else
rv = 0; /* device in rebuild state, return 0 from probe */
/* Add to online list even if in ftl rebuild */
spin_lock_irqsave(&dev_lock, flags);
list_add(&dd->online_list, &online_list);
spin_unlock_irqrestore(&dev_lock, flags);
goto done;
block_initialize_err:
pci_disable_msi(pdev);
msi_initialize_err:
if (dd->isr_workq) {
flush_workqueue(dd->isr_workq);
destroy_workqueue(dd->isr_workq);
drop_cpu(dd->work[0].cpu_binding);
drop_cpu(dd->work[1].cpu_binding);
drop_cpu(dd->work[2].cpu_binding);
}
setmask_err:
pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
iomap_err:
kfree(dd);
pci_set_drvdata(pdev, NULL);
return rv;
done:
return rv;
}
/*
* Called for each probed device when the device is removed or the
* driver is unloaded.
*
* return value
* None
*/
static void mtip_pci_remove(struct pci_dev *pdev)
{
struct driver_data *dd = pci_get_drvdata(pdev);
unsigned long flags, to;
set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
spin_lock_irqsave(&dev_lock, flags);
list_del_init(&dd->online_list);
list_add(&dd->remove_list, &removing_list);
spin_unlock_irqrestore(&dev_lock, flags);
mtip_check_surprise_removal(pdev);
synchronize_irq(dd->pdev->irq);
/* Spin until workers are done */
to = jiffies + msecs_to_jiffies(4000);
do {
msleep(20);
} while (atomic_read(&dd->irq_workers_active) != 0 &&
time_before(jiffies, to));
if (atomic_read(&dd->irq_workers_active) != 0) {
dev_warn(&dd->pdev->dev,
"Completion workers still active!\n");
}
/* Clean up the block layer. */
mtip_block_remove(dd);
if (dd->isr_workq) {
flush_workqueue(dd->isr_workq);
destroy_workqueue(dd->isr_workq);
drop_cpu(dd->work[0].cpu_binding);
drop_cpu(dd->work[1].cpu_binding);
drop_cpu(dd->work[2].cpu_binding);
}
pci_disable_msi(pdev);
spin_lock_irqsave(&dev_lock, flags);
list_del_init(&dd->remove_list);
spin_unlock_irqrestore(&dev_lock, flags);
if (!dd->sr)
kfree(dd);
else
set_bit(MTIP_DDF_REMOVE_DONE_BIT, &dd->dd_flag);
pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
pci_set_drvdata(pdev, NULL);
}
/*
* Called for each probed device when the device is suspended.
*
* return value
* 0 Success
* <0 Error
*/
static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
int rv = 0;
struct driver_data *dd = pci_get_drvdata(pdev);
if (!dd) {
dev_err(&pdev->dev,
"Driver private datastructure is NULL\n");
return -EFAULT;
}
set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
/* Disable ports & interrupts then send standby immediate */
rv = mtip_block_suspend(dd);
if (rv < 0) {
dev_err(&pdev->dev,
"Failed to suspend controller\n");
return rv;
}
/*
* Save the pci config space to pdev structure &
* disable the device
*/
pci_save_state(pdev);
pci_disable_device(pdev);
/* Move to Low power state*/
pci_set_power_state(pdev, PCI_D3hot);
return rv;
}
/*
* Called for each probed device when the device is resumed.
*
* return value
* 0 Success
* <0 Error
*/
static int mtip_pci_resume(struct pci_dev *pdev)
{
int rv = 0;
struct driver_data *dd;
dd = pci_get_drvdata(pdev);
if (!dd) {
dev_err(&pdev->dev,
"Driver private datastructure is NULL\n");
return -EFAULT;
}
/* Move the device to active State */
pci_set_power_state(pdev, PCI_D0);
/* Restore PCI configuration space */
pci_restore_state(pdev);
/* Enable the PCI device*/
rv = pcim_enable_device(pdev);
if (rv < 0) {
dev_err(&pdev->dev,
"Failed to enable card during resume\n");
goto err;
}
pci_set_master(pdev);
/*
* Calls hbaReset, initPort, & startPort function
* then enables interrupts
*/
rv = mtip_block_resume(dd);
if (rv < 0)
dev_err(&pdev->dev, "Unable to resume\n");
err:
clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
return rv;
}
/*
* Shutdown routine
*
* return value
* None
*/
static void mtip_pci_shutdown(struct pci_dev *pdev)
{
struct driver_data *dd = pci_get_drvdata(pdev);
if (dd)
mtip_block_shutdown(dd);
}
/* Table of device ids supported by this driver. */
static const struct pci_device_id mtip_pci_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320H_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320M_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320S_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_MICRON, P325M_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420H_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420M_DEVICE_ID) },
{ PCI_DEVICE(PCI_VENDOR_ID_MICRON, P425M_DEVICE_ID) },
{ 0 }
};
/* Structure that describes the PCI driver functions. */
static struct pci_driver mtip_pci_driver = {
.name = MTIP_DRV_NAME,
.id_table = mtip_pci_tbl,
.probe = mtip_pci_probe,
.remove = mtip_pci_remove,
.suspend = mtip_pci_suspend,
.resume = mtip_pci_resume,
.shutdown = mtip_pci_shutdown,
};
MODULE_DEVICE_TABLE(pci, mtip_pci_tbl);
/*
* Module initialization function.
*
* Called once when the module is loaded. This function allocates a major
* block device number to the Cyclone devices and registers the PCI layer
* of the driver.
*
* Return value
* 0 on success else error code.
*/
static int __init mtip_init(void)
{
int error;
pr_info(MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n");
spin_lock_init(&dev_lock);
INIT_LIST_HEAD(&online_list);
INIT_LIST_HEAD(&removing_list);
/* Allocate a major block device number to use with this driver. */
error = register_blkdev(0, MTIP_DRV_NAME);
if (error <= 0) {
pr_err("Unable to register block device (%d)\n",
error);
return -EBUSY;
}
mtip_major = error;
dfs_parent = debugfs_create_dir("rssd", NULL);
if (IS_ERR_OR_NULL(dfs_parent)) {
pr_warn("Error creating debugfs parent\n");
dfs_parent = NULL;
}
if (dfs_parent) {
dfs_device_status = debugfs_create_file("device_status",
S_IRUGO, dfs_parent, NULL,
&mtip_device_status_fops);
if (IS_ERR_OR_NULL(dfs_device_status)) {
pr_err("Error creating device_status node\n");
dfs_device_status = NULL;
}
}
/* Register our PCI operations. */
error = pci_register_driver(&mtip_pci_driver);
if (error) {
debugfs_remove(dfs_parent);
unregister_blkdev(mtip_major, MTIP_DRV_NAME);
}
return error;
}
/*
* Module de-initialization function.
*
* Called once when the module is unloaded. This function deallocates
* the major block device number allocated by mtip_init() and
* unregisters the PCI layer of the driver.
*
* Return value
* none
*/
static void __exit mtip_exit(void)
{
/* Release the allocated major block device number. */
unregister_blkdev(mtip_major, MTIP_DRV_NAME);
/* Unregister the PCI driver. */
pci_unregister_driver(&mtip_pci_driver);
debugfs_remove_recursive(dfs_parent);
}
MODULE_AUTHOR("Micron Technology, Inc");
MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(MTIP_DRV_VERSION);
module_init(mtip_init);
module_exit(mtip_exit);
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