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android/drivers/mmc/core/block.c
T
threeeye bc1d038eac REVVL 6 Pro kernel bring-up: full working tree snapshot (2026-09-12) 
Squashed backup commit (no shallow-clone history issues) of
xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream
commit 9eece662e) plus all fixes applied to get everpal_defconfig building
clean against a modern (GCC 15.2.0) toolchain -- see the previous commit
message on the lineage-23.2 branch (also in this repo history is not
available here since this is a squashed snapshot; full incremental history
lives in the local DL380 checkout and the upstream GitHub remote).

Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
2026-09-12 13:36:46 +00:00

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/*
* Block driver for media (i.e., flash cards)
*
* Copyright 2002 Hewlett-Packard Company
* Copyright 2005-2008 Pierre Ossman
*
* Use consistent with the GNU GPL version 2 is permitted,
* provided that this copyright notice is
* preserved in its entirety in all copies and derived works.
*
* HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
* AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
* FITNESS FOR ANY PARTICULAR PURPOSE.
*
* Many thanks to Alessandro Rubini and Jonathan Corbet!
*
* Author: Andrew Christian
* 28 May 2002
*/
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/hdreg.h>
#include <linux/kdev_t.h>
#include <linux/blkdev.h>
#include <linux/cdev.h>
#include <linux/mutex.h>
#include <linux/scatterlist.h>
#include <linux/string_helpers.h>
#include <linux/delay.h>
#include <linux/capability.h>
#include <linux/compat.h>
#include <linux/pm_runtime.h>
#include <linux/idr.h>
#include <linux/debugfs.h>
#include <linux/math64.h>
#include <linux/mmc/ioctl.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#ifdef CONFIG_MMC_FFU
#include <linux/mmc/ffu.h>
#endif
#ifdef CONFIG_MTK_MMC_PWR_WP
#include <mt-plat/mtk_partition.h>
#include <linux/types.h>
#include "mtk_emmc_write_protect.h"
#endif
#include <linux/uaccess.h>
#include "mtk_mmc_block.h"
#include "queue.h"
#include "block.h"
#include "core.h"
#include "card.h"
#include "crypto.h"
#include "host.h"
#include "bus.h"
#include "mmc_ops.h"
#include "quirks.h"
#include "sd_ops.h"
#include "mmc_crypto.h"
#ifdef CONFIG_MTK_EMMC_HW_CQ
#include "dbg.h"
#endif
MODULE_ALIAS("mmc:block");
#ifdef MODULE_PARAM_PREFIX
#undef MODULE_PARAM_PREFIX
#endif
#define MODULE_PARAM_PREFIX "mmcblk."
#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
#define MMC_SANITIZE_REQ_TIMEOUT 240000
#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
#define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8)
#define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
(rq_data_dir(req) == WRITE))
/* emmc cmdq enabled if part idx <= PART_CMDQ_EN
* user: 0
* boot1: 1
* boot2: 2
*/
#define PART_CMDQ_EN 0
#ifdef CONFIG_MTK_EMMC_HW_CQ
static struct mmc_cmdq_req *mmc_cmdq_prep_dcmd(
struct mmc_queue_req *mqrq, struct mmc_queue *mq);
#endif
static DEFINE_MUTEX(block_mutex);
/*
* The defaults come from config options but can be overriden by module
* or bootarg options.
*/
static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
/*
* We've only got one major, so number of mmcblk devices is
* limited to (1 << 20) / number of minors per device. It is also
* limited by the MAX_DEVICES below.
*/
static int max_devices;
#define MAX_DEVICES 256
static DEFINE_IDA(mmc_blk_ida);
static DEFINE_IDA(mmc_rpmb_ida);
/*
* There is one mmc_blk_data per slot.
*/
struct mmc_blk_data {
spinlock_t lock;
struct device *parent;
struct gendisk *disk;
struct mmc_queue queue;
struct list_head part;
struct list_head rpmbs;
unsigned int flags;
#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
#define MMC_BLK_CMD_QUEUE (1 << 3) /* MMC command queue support*/
unsigned int usage;
unsigned int read_only;
unsigned int part_type;
unsigned int reset_done;
#define MMC_BLK_READ BIT(0)
#define MMC_BLK_WRITE BIT(1)
#define MMC_BLK_DISCARD BIT(2)
#define MMC_BLK_SECDISCARD BIT(3)
/*
* Only set in main mmc_blk_data associated
* with mmc_card with dev_set_drvdata, and keeps
* track of the current selected device partition.
*/
unsigned int part_curr;
struct device_attribute force_ro;
struct device_attribute power_ro_lock;
int area_type;
/* debugfs files (only in main mmc_blk_data) */
struct dentry *status_dentry;
struct dentry *ext_csd_dentry;
};
/* Device type for RPMB character devices */
static dev_t mmc_rpmb_devt;
/* Bus type for RPMB character devices */
static struct bus_type mmc_rpmb_bus_type = {
.name = "mmc_rpmb",
};
/**
* struct mmc_rpmb_data - special RPMB device type for these areas
* @dev: the device for the RPMB area
* @chrdev: character device for the RPMB area
* @id: unique device ID number
* @part_index: partition index (0 on first)
* @md: parent MMC block device
* @node: list item, so we can put this device on a list
*/
struct mmc_rpmb_data {
struct device dev;
struct cdev chrdev;
int id;
unsigned int part_index;
struct mmc_blk_data *md;
struct list_head node;
};
static DEFINE_MUTEX(open_lock);
module_param(perdev_minors, int, 0444);
MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
static inline int mmc_blk_part_switch(struct mmc_card *card,
unsigned int part_type);
static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
{
struct mmc_blk_data *md;
mutex_lock(&open_lock);
md = disk->private_data;
if (md && md->usage == 0)
md = NULL;
if (md)
md->usage++;
mutex_unlock(&open_lock);
return md;
}
static inline int mmc_get_devidx(struct gendisk *disk)
{
int devidx = disk->first_minor / perdev_minors;
return devidx;
}
static void mmc_blk_put(struct mmc_blk_data *md)
{
mutex_lock(&open_lock);
md->usage--;
if (md->usage == 0) {
int devidx = mmc_get_devidx(md->disk);
ida_simple_remove(&mmc_blk_ida, devidx);
put_disk(md->disk);
kfree(md);
}
mutex_unlock(&open_lock);
}
static ssize_t power_ro_lock_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
struct mmc_card *card = md->queue.card;
int locked = 0;
if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
locked = 2;
else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
locked = 1;
ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
mmc_blk_put(md);
return ret;
}
static ssize_t power_ro_lock_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
int ret;
struct mmc_blk_data *md, *part_md;
struct mmc_queue *mq;
struct request *req;
unsigned long set;
if (kstrtoul(buf, 0, &set))
return -EINVAL;
if (set != 1)
return count;
md = mmc_blk_get(dev_to_disk(dev));
mq = &md->queue;
/* Dispatch locking to the block layer */
req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, __GFP_RECLAIM);
if (IS_ERR(req)) {
count = PTR_ERR(req);
goto out_put;
}
req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP;
req_to_mmc_queue_req(req)->drv_op_result = -EIO;
blk_execute_rq(mq->queue, NULL, req, 0);
ret = req_to_mmc_queue_req(req)->drv_op_result;
blk_put_request(req);
if (!ret) {
pr_info("%s: Locking boot partition ro until next power on\n",
md->disk->disk_name);
set_disk_ro(md->disk, 1);
list_for_each_entry(part_md, &md->part, part)
if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
set_disk_ro(part_md->disk, 1);
}
}
out_put:
mmc_blk_put(md);
return count;
}
static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int ret;
struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
ret = snprintf(buf, PAGE_SIZE, "%d\n",
get_disk_ro(dev_to_disk(dev)) ^
md->read_only);
mmc_blk_put(md);
return ret;
}
static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int ret;
char *end;
struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
unsigned long set = simple_strtoul(buf, &end, 0);
if (end == buf) {
ret = -EINVAL;
goto out;
}
set_disk_ro(dev_to_disk(dev), set || md->read_only);
ret = count;
out:
mmc_blk_put(md);
return ret;
}
static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
{
struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
int ret = -ENXIO;
mutex_lock(&block_mutex);
if (md) {
if (md->usage == 2)
check_disk_change(bdev);
ret = 0;
if ((mode & FMODE_WRITE) && md->read_only) {
mmc_blk_put(md);
ret = -EROFS;
}
}
mutex_unlock(&block_mutex);
return ret;
}
static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
{
struct mmc_blk_data *md = disk->private_data;
mutex_lock(&block_mutex);
mmc_blk_put(md);
mutex_unlock(&block_mutex);
}
static int
mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
geo->heads = 4;
geo->sectors = 16;
return 0;
}
struct mmc_blk_ioc_data {
struct mmc_ioc_cmd ic;
unsigned char *buf;
u64 buf_bytes;
struct mmc_rpmb_data *rpmb;
};
static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
struct mmc_ioc_cmd __user *user)
{
struct mmc_blk_ioc_data *idata;
int err;
idata = kmalloc(sizeof(*idata), GFP_KERNEL);
if (!idata) {
err = -ENOMEM;
goto out;
}
if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
err = -EFAULT;
goto idata_err;
}
idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
err = -EOVERFLOW;
goto idata_err;
}
if (!idata->buf_bytes) {
idata->buf = NULL;
return idata;
}
idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
if (!idata->buf) {
err = -ENOMEM;
goto idata_err;
}
if (copy_from_user(idata->buf, (void __user *)(unsigned long)
idata->ic.data_ptr, idata->buf_bytes)) {
err = -EFAULT;
goto copy_err;
}
return idata;
copy_err:
kfree(idata->buf);
idata_err:
kfree(idata);
out:
return ERR_PTR(err);
}
static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
struct mmc_blk_ioc_data *idata)
{
struct mmc_ioc_cmd *ic = &idata->ic;
if (copy_to_user(&(ic_ptr->response), ic->response,
sizeof(ic->response)))
return -EFAULT;
if (!idata->ic.write_flag) {
if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
idata->buf, idata->buf_bytes))
return -EFAULT;
}
return 0;
}
static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
u32 retries_max)
{
int err;
u32 retry_count = 0;
if (!status || !retries_max)
return -EINVAL;
do {
err = __mmc_send_status(card, status, 5);
if (err)
break;
if (!R1_STATUS(*status) &&
(R1_CURRENT_STATE(*status) != R1_STATE_PRG))
break; /* RPMB programming operation complete */
/*
* Rechedule to give the MMC device a chance to continue
* processing the previous command without being polled too
* frequently.
*/
usleep_range(1000, 5000);
} while (++retry_count < retries_max);
if (retry_count == retries_max)
err = -EPERM;
return err;
}
static int ioctl_do_sanitize(struct mmc_card *card)
{
int err;
if (!mmc_can_sanitize(card)) {
pr_warn("%s: %s - SANITIZE is not supported\n",
mmc_hostname(card->host), __func__);
err = BLK_STS_NOTSUPP;
goto out;
}
pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
mmc_hostname(card->host), __func__);
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_SANITIZE_START, 1,
MMC_SANITIZE_REQ_TIMEOUT);
if (err)
pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
mmc_hostname(card->host), __func__, err);
pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
__func__);
out:
return err;
}
static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
struct mmc_blk_ioc_data *idata)
{
struct mmc_command cmd = {};
struct mmc_data data = {};
struct mmc_request mrq = {};
struct scatterlist sg;
int err;
unsigned int target_part;
u32 status = 0;
if (!card || !md || !idata)
return -EINVAL;
/*
* The RPMB accesses comes in from the character device, so we
* need to target these explicitly. Else we just target the
* partition type for the block device the ioctl() was issued
* on.
*/
if (idata->rpmb) {
/* Support multiple RPMB partitions */
target_part = idata->rpmb->part_index;
target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB;
} else {
target_part = md->part_type;
}
cmd.opcode = idata->ic.opcode;
cmd.arg = idata->ic.arg;
cmd.flags = idata->ic.flags;
if (idata->buf_bytes) {
data.sg = &sg;
data.sg_len = 1;
data.blksz = idata->ic.blksz;
data.blocks = idata->ic.blocks;
sg_init_one(data.sg, idata->buf, idata->buf_bytes);
if (idata->ic.write_flag)
data.flags = MMC_DATA_WRITE;
else
data.flags = MMC_DATA_READ;
/* data.flags must already be set before doing this. */
mmc_set_data_timeout(&data, card);
/* Allow overriding the timeout_ns for empirical tuning. */
if (idata->ic.data_timeout_ns)
data.timeout_ns = idata->ic.data_timeout_ns;
if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
/*
* Pretend this is a data transfer and rely on the
* host driver to compute timeout. When all host
* drivers support cmd.cmd_timeout for R1B, this
* can be changed to:
*
* mrq.data = NULL;
* cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
*/
data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
}
mrq.data = &data;
}
mrq.cmd = &cmd;
err = mmc_blk_part_switch(card, target_part);
if (err)
return err;
if (idata->ic.is_acmd) {
err = mmc_app_cmd(card->host, card);
if (err)
return err;
}
if (idata->rpmb) {
err = mmc_set_blockcount(card, data.blocks,
idata->ic.write_flag & (1 << 31));
if (err)
return err;
}
if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
(cmd.opcode == MMC_SWITCH)) {
err = ioctl_do_sanitize(card);
if (err)
pr_err("%s: ioctl_do_sanitize() failed. err = %d",
__func__, err);
return err;
}
#ifdef CONFIG_MMC_FFU
if (cmd.opcode == MMC_FFU_DOWNLOAD_OP
|| cmd.opcode == MMC_FFU_INSTALL_OP) {
mmc_wait_for_ffu_req(card->host, &mrq);
} else
#endif
mmc_wait_for_req(card->host, &mrq);
if (cmd.error) {
dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
__func__, cmd.error);
return cmd.error;
}
if (data.error) {
dev_err(mmc_dev(card->host), "%s: data error %d\n",
__func__, data.error);
return data.error;
}
/*
* Make sure the cache of the PARTITION_CONFIG register and
* PARTITION_ACCESS bits is updated in case the ioctl ext_csd write
* changed it successfully.
*/
if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) &&
(cmd.opcode == MMC_SWITCH)) {
struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg);
/*
* Update cache so the next mmc_blk_part_switch call operates
* on up-to-date data.
*/
card->ext_csd.part_config = value;
main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK;
}
/*
* Make sure to update CACHE_CTRL in case it was changed. The cache
* will get turned back on if the card is re-initialized, e.g.
* suspend/resume or hw reset in recovery.
*/
if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_CACHE_CTRL) &&
(cmd.opcode == MMC_SWITCH)) {
u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg) & 1;
card->ext_csd.cache_ctrl = value;
}
/*
* According to the SD specs, some commands require a delay after
* issuing the command.
*/
if (idata->ic.postsleep_min_us)
usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
if (idata->rpmb) {
/*
* Ensure RPMB command has completed by polling CMD13
* "Send Status".
*/
err = ioctl_rpmb_card_status_poll(card, &status, 5);
if (err)
dev_err(mmc_dev(card->host),
"%s: Card Status=0x%08X, error %d\n",
__func__, status, err);
}
return err;
}
#ifdef CONFIG_MTK_MMC_PWR_WP
static int mmc_pwr_wp_ioctl(struct block_device *bdev, unsigned long arg)
{
struct mmc_blk_data *md;
struct mmc_card *card;
unsigned int power_on_wp_en = 0;
int err = 0;
if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
return -EPERM;
if (copy_from_user(&power_on_wp_en, (void *)arg, 1))
return -EFAULT;
/*do noting if power-on write protect arg =0*/
if (power_on_wp_en == 0) {
pr_debug("%s: power_on_wp_en = %d\n", __func__, power_on_wp_en);
return 0;
}
md = mmc_blk_get(bdev->bd_disk);
if (!md)
return -EINVAL;
card = md->queue.card;
if (IS_ERR(card)) {
err = PTR_ERR(card);
goto cmd_done;
}
mmc_get_card(card);
/*
* Default partitions defined in mtk_emmc_write_protect.c will set
* power-on write protect by this function.
*/
err = set_power_on_write_protect(card);
mmc_put_card(card);
cmd_done:
mmc_blk_put(md);
return err;
}
#endif
#ifdef CONFIG_MTK_EMMC_SUPPORT_OTP
#define MMC_SEND_WRITE_PROT_TYPE 31
#define EXT_CSD_USR_WP 171 /* R/W */
#define US_PERM_WP_EN 4
int mmc_otp_ops_check_bdev(struct block_device *bdev)
{
if (!bdev || !bdev->bd_part || !bdev->bd_part->info
|| strcmp(bdev->bd_part->info->volname, "otp"))
return 0;
return 1;
}
int mmc_otp_ops_check(struct block_device *bdev,
struct mmc_ioc_cmd __user *ic_ptr)
{
u32 opcode, arg;
if ((get_user(opcode, &ic_ptr->opcode) == 0) &&
(get_user(arg, &ic_ptr->arg) == 0)) {
if ((opcode == MMC_SET_WRITE_PROT)
|| (opcode == MMC_CLR_WRITE_PROT)
|| (opcode == MMC_SEND_WRITE_PROT)
|| (opcode == MMC_SEND_WRITE_PROT_TYPE)) {
if (arg >= bdev->bd_part->nr_sects)
return -EFAULT;
arg += bdev->bd_part->start_sect;
} else if (opcode == MMC_SWITCH) {
if (((arg >> 16) & 0xFF) != EXT_CSD_USR_WP)
return -EPERM;
#ifndef CONFIG_MTK_EMMC_SUPPORT_OTP_FOR_CUSTOMER
/* prevent users' permanent writ protect in sqc */
if (((arg >> 8) & US_PERM_WP_EN)
&& ((((arg >> 24) & 0x3) == MMC_SWITCH_MODE_SET_BITS)
|| (((arg >> 24) & 0x3) == MMC_SWITCH_MODE_WRITE_BYTE))) {
return -EPERM;
}
#endif
} else {
return -EPERM;
}
if (put_user(arg, &ic_ptr->arg) != 0)
return -EFAULT;
} else
return -EFAULT;
return 0;
}
#endif
#ifdef CONFIG_MMC_FFU
int mmc_ffu_ops_check_bdev(struct block_device *bdev,
struct mmc_ioc_cmd __user *ic_ptr)
{
u32 opcode;
struct mmc_blk_data *md;
struct mmc_card *card;
md = mmc_blk_get(bdev->bd_disk);
if (!md)
return 0;
card = md->queue.card;
if (IS_ERR(card) || !mmc_card_mmc(card)) {
mmc_blk_put(md);
return 0;
}
if (get_user(opcode, &ic_ptr->opcode) == 0) {
if (opcode == MMC_FFU_DOWNLOAD_OP
|| opcode == MMC_FFU_INSTALL_OP
|| opcode == MMC_SEND_EXT_CSD) {
mmc_blk_put(md);
return 1;
}
}
mmc_blk_put(md);
return 0;
}
#endif
static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md,
struct mmc_ioc_cmd __user *ic_ptr,
struct mmc_rpmb_data *rpmb)
{
struct mmc_blk_ioc_data *idata;
struct mmc_blk_ioc_data *idatas[1];
struct mmc_queue *mq;
struct mmc_card *card;
int err = 0, ioc_err = 0;
struct request *req;
idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
if (IS_ERR(idata))
return PTR_ERR(idata);
/* This will be NULL on non-RPMB ioctl():s */
idata->rpmb = rpmb;
card = md->queue.card;
if (IS_ERR(card)) {
err = PTR_ERR(card);
goto cmd_done;
}
/*
* Dispatch the ioctl() into the block request queue.
*/
mq = &md->queue;
req = blk_get_request(mq->queue,
idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN,
__GFP_RECLAIM);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto cmd_done;
}
idatas[0] = idata;
req_to_mmc_queue_req(req)->drv_op =
rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
req_to_mmc_queue_req(req)->drv_op_result = -EIO;
req_to_mmc_queue_req(req)->drv_op_data = idatas;
req_to_mmc_queue_req(req)->ioc_count = 1;
blk_execute_rq(mq->queue, NULL, req, 0);
ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
blk_put_request(req);
cmd_done:
kfree(idata->buf);
kfree(idata);
return ioc_err ? ioc_err : err;
}
static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md,
struct mmc_ioc_multi_cmd __user *user,
struct mmc_rpmb_data *rpmb)
{
struct mmc_blk_ioc_data **idata = NULL;
struct mmc_ioc_cmd __user *cmds = user->cmds;
struct mmc_card *card;
struct mmc_queue *mq;
int i, err = 0, ioc_err = 0;
__u64 num_of_cmds;
struct request *req;
if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
sizeof(num_of_cmds)))
return -EFAULT;
if (!num_of_cmds)
return 0;
if (num_of_cmds > MMC_IOC_MAX_CMDS)
return -EINVAL;
idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
if (!idata)
return -ENOMEM;
for (i = 0; i < num_of_cmds; i++) {
idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
if (IS_ERR(idata[i])) {
err = PTR_ERR(idata[i]);
num_of_cmds = i;
goto cmd_err;
}
/* This will be NULL on non-RPMB ioctl():s */
idata[i]->rpmb = rpmb;
}
card = md->queue.card;
if (IS_ERR(card)) {
err = PTR_ERR(card);
goto cmd_err;
}
/*
* Dispatch the ioctl()s into the block request queue.
*/
mq = &md->queue;
req = blk_get_request(mq->queue,
idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN,
__GFP_RECLAIM);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto cmd_err;
}
req_to_mmc_queue_req(req)->drv_op =
rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
req_to_mmc_queue_req(req)->drv_op_result = -EIO;
req_to_mmc_queue_req(req)->drv_op_data = idata;
req_to_mmc_queue_req(req)->ioc_count = num_of_cmds;
blk_execute_rq(mq->queue, NULL, req, 0);
ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
/* copy to user if data and response */
for (i = 0; i < num_of_cmds && !err; i++)
err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
blk_put_request(req);
cmd_err:
for (i = 0; i < num_of_cmds; i++) {
kfree(idata[i]->buf);
kfree(idata[i]);
}
kfree(idata);
return ioc_err ? ioc_err : err;
}
#ifdef CONFIG_MMC_FFU
static int mt_ffu_mmc_blk_check_blkdev(struct block_device *bdev,
struct mmc_ioc_cmd __user *ic_ptr)
{
/*
* The caller must have CAP_SYS_RAWIO, and must be calling this on the
* whole block device, not on a partition. This prevents overspray
* between sibling partitions.
*/
if ((!mmc_ffu_ops_check_bdev(bdev, ic_ptr) &&
!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
return -EPERM;
return 0;
}
#endif
#define MMC_BLK_NO_WP 0
#define MMC_BLK_PARTIALLY_WP 1
#define MMC_BLK_FULLY_WP 2
static int mmc_blk_check_disk_range_wp(struct gendisk *disk,
sector_t part_start, sector_t part_nr_sects)
{
struct mmc_command cmd = {0};
struct mmc_request mrq = {NULL};
struct mmc_data data = {0};
struct mmc_blk_data *md;
struct mmc_card *card;
struct scatterlist sg;
unsigned char *buf = NULL, status;
sector_t start, end, quot;
sector_t wp_grp_rem, wp_grp_total, wp_grp_found, status_query_cnt;
unsigned int remain;
int err = 0, i, j, k;
u8 boot_wp_status = 0;
#if defined(CONFIG_MTK_EMMC_CQ_SUPPORT) || defined(CONFIG_MTK_EMMC_HW_CQ)
bool cmdq_en = false;
#endif
md = mmc_blk_get(disk);
if (!md)
return -EINVAL;
if (!md->queue.card) {
err = -EINVAL;
goto out2;
}
card = md->queue.card;
/* NMCARD use a eMMC4.5-like protocol but it is extern storage,
* no need check WP status.
*/
if (!mmc_card_mmc(card) ||
(card->host->caps2 & MMC_CAP2_NMCARD) ||
md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
err = MMC_BLK_NO_WP;
goto out2;
}
/* BOOT_WP_STATUS in EXT_CSD:
* |-----bit[7:4]-----|-------bit[3:2]--------|-------bit[1:0]--------|
* |-----reserved-----|----boot1 wp status----|----boot0 wp status----|
* boot0 area wp type:depending on bit[1:0]
* 0->not wp; 1->power on wp; 2->permanent wp; 3:reserved value
* boot1 area wp type:depending on bit[3:2]
* 0->not wp; 1->power on wp; 2->permanent wp; 3:reserved value
*/
if (md->part_type == EXT_CSD_PART_CONFIG_ACC_BOOT0) {
boot_wp_status = card->ext_csd.boot_wp_status & 0x3;
if (boot_wp_status == 0x1 || boot_wp_status == 0x2) {
pr_notice("%s is fully write protected\n",
disk->disk_name);
err = MMC_BLK_FULLY_WP;
} else
err = MMC_BLK_NO_WP;
goto out2;
}
/* EXT_CSD_PART_CONFIG_ACC_BOOT0 + 1 <=> BOOT1 */
if (md->part_type == (EXT_CSD_PART_CONFIG_ACC_BOOT0 + 1)) {
boot_wp_status = (card->ext_csd.boot_wp_status >> 2) & 0x3;
if (boot_wp_status == 0x1 || boot_wp_status == 0x2) {
pr_notice("%s is fully write protected\n",
disk->disk_name);
err = MMC_BLK_FULLY_WP;
} else
err = MMC_BLK_NO_WP;
goto out2;
}
if (!card->wp_grp_size) {
pr_notice("Write protect group size cannot be 0!\n");
err = -EINVAL;
goto out2;
}
start = part_start;
quot = start;
quot = div_u64_rem(quot, card->wp_grp_size, &remain);
if (remain) {
pr_notice("Start 0x%llx of disk %s not write group aligned\n",
(unsigned long long)part_start, disk->disk_name);
start -= remain;
}
end = part_start + part_nr_sects;
quot = end;
quot = div_u64_rem(quot, card->wp_grp_size, &remain);
if (remain) {
pr_notice("End 0x%llx of disk %s not write group aligned\n",
(unsigned long long)part_start, disk->disk_name);
end += card->wp_grp_size - remain;
}
wp_grp_total = end - start;
wp_grp_rem = div_u64(wp_grp_total, card->wp_grp_size);
wp_grp_found = 0;
cmd.opcode = MMC_SEND_WRITE_PROT_TYPE;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
buf = kmalloc(8, GFP_KERNEL);
if (!buf) {
err = -ENOMEM;
goto out2;
}
sg_init_one(&sg, buf, 8);
data.blksz = 8;
data.blocks = 1;
data.flags = MMC_DATA_READ;
data.sg = &sg;
data.sg_len = 1;
mmc_set_data_timeout(&data, card);
mrq.cmd = &cmd;
mrq.data = &data;
mmc_get_card(card);
err = mmc_blk_part_switch(card, md->part_type);
if (err) {
err = -EIO;
goto out;
}
#if defined(CONFIG_MTK_EMMC_CQ_SUPPORT) || defined(CONFIG_MTK_EMMC_HW_CQ)
cmdq_en = !!mmc_card_cmdq(card);
if (cmdq_en) {
err = mmc_cmdq_disable(card);
if (err) {
pr_notice("%s, %s: disable cmdq error %d\n",
__func__, mmc_hostname(card->host), err);
err = -EIO;
goto out;
}
}
#endif
status_query_cnt = (wp_grp_total + 31) / 32;
for (i = 0; i < status_query_cnt; i++) {
cmd.arg = start + i * card->wp_grp_size * 32;
mmc_wait_for_req(card->host, &mrq);
if (cmd.error) {
pr_notice("%s: cmd error %d\n", __func__, cmd.error);
err = -EIO;
goto out;
}
/* wp status is returned in 8 bytes.
* The 8 bytes is regarded as 64-bits bit-stream:
* +--------+--------+-------------------------+--------+
* | byte 7 | byte 6 | ... | byte 0 |
* | bits | bits | | bits |
* |76543210|76543210| |76543210|
* +--------+--------+-------------------------+--------+
* The 2 LSBits represent write-protect group status of
* the lowest address group being queried.
* The 2 MSBits represent write-protect group status of
* the highst address group being queried.
*/
/* Check write-protect group status from lowest address
* group to highest address group
*/
for (j = 0; j < 8; j++) {
status = buf[7 - j];
for (k = 0; k < 8; k += 2) {
if (status & (3 << k))
wp_grp_found++;
wp_grp_rem--;
if (!wp_grp_rem)
goto out;
}
}
memset(buf, 0, 8);
}
out:
#if defined(CONFIG_MTK_EMMC_CQ_SUPPORT) || defined(CONFIG_MTK_EMMC_HW_CQ)
if (cmdq_en) {
err = mmc_cmdq_enable(card);
if (err) {
pr_notice("%s, %s: enable cmdq error %d\n",
__func__, mmc_hostname(card->host), err);
err = -EIO;
}
}
#endif
mmc_put_card(card);
if (!wp_grp_rem) {
if (!wp_grp_found)
err = MMC_BLK_NO_WP;
else if (wp_grp_found == wp_grp_total) {
pr_notice("0x%llx ~ 0x%llx of %s is fully write protected\n",
(unsigned long long)part_start,
(unsigned long long)part_start + part_nr_sects,
disk->disk_name);
err = MMC_BLK_FULLY_WP;
} else {
pr_notice("0x%llx ~ 0x%llx of %s is partially write protected\n",
(unsigned long long)part_start,
(unsigned long long)part_start + part_nr_sects,
disk->disk_name);
err = MMC_BLK_PARTIALLY_WP;
}
}
kfree(buf);
out2:
mmc_blk_put(md);
return err;
}
static int mmc_blk_check_wp(struct block_device *bdev)
{
if (!bdev->bd_disk || !bdev->bd_part)
return -EINVAL;
return mmc_blk_check_disk_range_wp(bdev->bd_disk,
bdev->bd_part->start_sect,
bdev->bd_part->nr_sects);
}
static int mmc_blk_ioctl_roset(struct block_device *bdev,
unsigned long arg)
{
int val;
/* Always return -EACCES to block layer on any error
* and then block layer will abort the remaining operation
*/
if (get_user(val, (int __user *)arg))
return -EACCES;
/* No need to check write-protect status when setting as readonly */
if (val)
return 0;
if (mmc_blk_check_wp(bdev) != MMC_BLK_NO_WP)
return -EACCES;
return 0;
}
static int mmc_blk_check_blkdev(struct block_device *bdev)
{
/*
* The caller must have CAP_SYS_RAWIO, and must be calling this on the
* whole block device, not on a partition. This prevents overspray
* between sibling partitions.
*/
if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
return -EPERM;
return 0;
}
static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct mmc_blk_data *md;
int ret;
#ifdef CONFIG_MTK_EMMC_SUPPORT_OTP
bool otp_dev;
#endif
switch (cmd) {
case MMC_IOC_CMD:
#ifdef CONFIG_MTK_EMMC_SUPPORT_OTP
otp_dev = mmc_otp_ops_check_bdev(bdev);
if (!otp_dev) {
#endif
#ifdef CONFIG_MMC_FFU
ret = mt_ffu_mmc_blk_check_blkdev(bdev,
(struct mmc_ioc_cmd __user *)arg);
#else
ret = mmc_blk_check_blkdev(bdev);
#endif
#ifdef CONFIG_MTK_EMMC_SUPPORT_OTP
} else
ret = mmc_otp_ops_check(bdev,
(struct mmc_ioc_cmd __user *)arg);
#endif
if (ret)
return ret;
md = mmc_blk_get(bdev->bd_disk);
if (!md)
return -EINVAL;
ret = mmc_blk_ioctl_cmd(md,
(struct mmc_ioc_cmd __user *)arg,
NULL);
mmc_blk_put(md);
return ret;
case MMC_IOC_MULTI_CMD:
ret = mmc_blk_check_blkdev(bdev);
if (ret)
return ret;
md = mmc_blk_get(bdev->bd_disk);
if (!md)
return -EINVAL;
ret = mmc_blk_ioctl_multi_cmd(md,
(struct mmc_ioc_multi_cmd __user *)arg,
NULL);
mmc_blk_put(md);
return ret;
#ifdef CONFIG_MTK_MMC_PWR_WP
case MMC_IOC_WP_CMD:
return mmc_pwr_wp_ioctl(bdev, arg);
#endif
case BLKROSET:
return mmc_blk_ioctl_roset(bdev, arg);
default:
return -EINVAL;
}
}
#ifdef CONFIG_COMPAT
static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
}
#endif
static const struct block_device_operations mmc_bdops = {
.open = mmc_blk_open,
.release = mmc_blk_release,
.getgeo = mmc_blk_getgeo,
.owner = THIS_MODULE,
.ioctl = mmc_blk_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = mmc_blk_compat_ioctl,
#endif
.check_disk_range_wp = mmc_blk_check_disk_range_wp,
};
static int mmc_blk_part_switch_pre(struct mmc_card *card,
unsigned int part_type)
{
const unsigned int mask = EXT_CSD_PART_CONFIG_ACC_MASK;
const unsigned int rpmb = EXT_CSD_PART_CONFIG_ACC_RPMB;
int ret = 0;
#if defined(CONFIG_MTK_EMMC_CQ_SUPPORT) || defined(CONFIG_MTK_EMMC_HW_CQ)
/* disabe cmdq
* if partition does not support cmdq
*/
if (mmc_card_cmdq(card)
&& !(part_type <= PART_CMDQ_EN)) {
ret = mmc_cmdq_disable(card);
if (ret)
return ret;
}
if ((part_type & mask) == rpmb)
mmc_retune_pause(card->host);
#else
if ((part_type & mask) == rpmb) {
if (card->ext_csd.cmdq_en) {
ret = mmc_cmdq_disable(card);
if (ret)
return ret;
}
mmc_retune_pause(card->host);
}
#endif
return ret;
}
static int mmc_blk_part_switch_post(struct mmc_card *card,
unsigned int part_type)
{
const unsigned int mask = EXT_CSD_PART_CONFIG_ACC_MASK;
const unsigned int rpmb = EXT_CSD_PART_CONFIG_ACC_RPMB;
int ret = 0;
#if defined(CONFIG_MTK_EMMC_CQ_SUPPORT) || defined(CONFIG_MTK_EMMC_HW_CQ)
if ((part_type & mask) == mask)
mmc_retune_unpause(card->host);
/* enable cmdq
* if partition supports cmdq
*/
if ((!mmc_card_cmdq(card)) && (part_type <= PART_CMDQ_EN)) {
ret = mmc_cmdq_enable(card);
if (ret)
return ret;
}
#else
if ((part_type & mask) == rpmb) {
mmc_retune_unpause(card->host);
if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
ret = mmc_cmdq_enable(card);
}
#endif
return ret;
}
static inline int mmc_blk_part_switch(struct mmc_card *card,
unsigned int part_type)
{
int ret = 0;
struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
if (main_md->part_curr == part_type)
return 0;
if (mmc_card_mmc(card)) {
u8 part_config = card->ext_csd.part_config;
ret = mmc_blk_part_switch_pre(card, part_type);
if (ret)
return ret;
part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
part_config |= part_type;
ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_PART_CONFIG, part_config,
card->ext_csd.part_time);
if (ret) {
mmc_blk_part_switch_post(card, part_type);
return ret;
}
card->ext_csd.part_config = part_config;
ret = mmc_blk_part_switch_post(card, part_type);
}
#ifdef CONFIG_MTK_EMMC_HW_CQ
card->part_curr = part_type;
#endif
main_md->part_curr = part_type;
return ret;
}
static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
{
int err;
u32 result;
__be32 *blocks;
struct mmc_request mrq = {};
struct mmc_command cmd = {};
struct mmc_data data = {};
struct scatterlist sg;
cmd.opcode = MMC_APP_CMD;
cmd.arg = card->rca << 16;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(card->host, &cmd, 0);
if (err)
return err;
if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
return -EIO;
memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
cmd.arg = 0;
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
data.blksz = 4;
data.blocks = 1;
data.flags = MMC_DATA_READ;
data.sg = &sg;
data.sg_len = 1;
mmc_set_data_timeout(&data, card);
mrq.cmd = &cmd;
mrq.data = &data;
blocks = kmalloc(4, GFP_KERNEL);
if (!blocks)
return -ENOMEM;
sg_init_one(&sg, blocks, 4);
mmc_wait_for_req(card->host, &mrq);
result = ntohl(*blocks);
kfree(blocks);
if (cmd.error || data.error)
return -EIO;
*written_blocks = result;
return 0;
}
static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
bool hw_busy_detect, struct request *req, bool *gen_err)
{
unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
int err = 0;
u32 status;
do {
err = __mmc_send_status(card, &status, 5);
if (err) {
pr_err("%s: error %d requesting status\n",
req->rq_disk->disk_name, err);
return err;
}
if (status & R1_ERROR) {
pr_err("%s: %s: error sending status cmd, status %#x\n",
req->rq_disk->disk_name, __func__, status);
*gen_err = true;
}
/* We may rely on the host hw to handle busy detection.*/
if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
hw_busy_detect)
break;
/*
* Timeout if the device never becomes ready for data and never
* leaves the program state.
*/
if (time_after(jiffies, timeout)) {
pr_err("%s: Card stuck in programming state! %s %s\n",
mmc_hostname(card->host),
req->rq_disk->disk_name, __func__);
return -ETIMEDOUT;
}
/*
* Some cards mishandle the status bits,
* so make sure to check both the busy
* indication and the card state.
*/
} while (!(status & R1_READY_FOR_DATA) ||
(R1_CURRENT_STATE(status) == R1_STATE_PRG));
return err;
}
static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
struct request *req, bool *gen_err, u32 *stop_status)
{
struct mmc_host *host = card->host;
struct mmc_command cmd = {};
int err;
bool use_r1b_resp = rq_data_dir(req) == WRITE;
/*
* Normally we use R1B responses for WRITE, but in cases where the host
* has specified a max_busy_timeout we need to validate it. A failure
* means we need to prevent the host from doing hw busy detection, which
* is done by converting to a R1 response instead.
*/
if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
use_r1b_resp = false;
cmd.opcode = MMC_STOP_TRANSMISSION;
if (use_r1b_resp) {
cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
cmd.busy_timeout = timeout_ms;
} else {
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
}
err = mmc_wait_for_cmd(host, &cmd, 5);
if (err)
return err;
*stop_status = cmd.resp[0];
/* No need to check card status in case of READ. */
if (rq_data_dir(req) == READ)
return 0;
if (!mmc_host_is_spi(host) &&
(*stop_status & R1_ERROR)) {
pr_err("%s: %s: general error sending stop command, resp %#x\n",
req->rq_disk->disk_name, __func__, *stop_status);
*gen_err = true;
}
return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
}
#define ERR_NOMEDIUM 3
#define ERR_RETRY 2
#define ERR_ABORT 1
#define ERR_CONTINUE 0
static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
bool status_valid, u32 status)
{
switch (error) {
case -EILSEQ:
/* response crc error, retry the r/w cmd */
pr_err("%s: %s sending %s command, card status %#x\n",
req->rq_disk->disk_name, "response CRC error",
name, status);
return ERR_RETRY;
case -ETIMEDOUT:
pr_err("%s: %s sending %s command, card status %#x\n",
req->rq_disk->disk_name, "timed out", name, status);
/* If the status cmd initially failed, retry the r/w cmd */
if (!status_valid) {
pr_err("%s: status not valid, retrying timeout\n",
req->rq_disk->disk_name);
return ERR_RETRY;
}
/*
* If it was a r/w cmd crc error, or illegal command
* (eg, issued in wrong state) then retry - we should
* have corrected the state problem above.
*/
if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
pr_err("%s: command error, retrying timeout\n",
req->rq_disk->disk_name);
return ERR_RETRY;
}
/* Otherwise abort the command */
return ERR_ABORT;
default:
/* We don't understand the error code the driver gave us */
pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
req->rq_disk->disk_name, error, status);
return ERR_ABORT;
}
}
/*
* Initial r/w and stop cmd error recovery.
* We don't know whether the card received the r/w cmd or not, so try to
* restore things back to a sane state. Essentially, we do this as follows:
* - Obtain card status. If the first attempt to obtain card status fails,
* the status word will reflect the failed status cmd, not the failed
* r/w cmd. If we fail to obtain card status, it suggests we can no
* longer communicate with the card.
* - Check the card state. If the card received the cmd but there was a
* transient problem with the response, it might still be in a data transfer
* mode. Try to send it a stop command. If this fails, we can't recover.
* - If the r/w cmd failed due to a response CRC error, it was probably
* transient, so retry the cmd.
* - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
* - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
* illegal cmd, retry.
* Otherwise we don't understand what happened, so abort.
*/
static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
struct mmc_blk_request *brq, bool *ecc_err, bool *gen_err)
{
bool prev_cmd_status_valid = true;
u32 status, stop_status = 0;
int err, retry;
if (mmc_card_removed(card))
return ERR_NOMEDIUM;
/*
* Try to get card status which indicates both the card state
* and why there was no response. If the first attempt fails,
* we can't be sure the returned status is for the r/w command.
*/
for (retry = 2; retry >= 0; retry--) {
err = __mmc_send_status(card, &status, 0);
if (!err)
break;
/* Re-tune if needed */
mmc_retune_recheck(card->host);
prev_cmd_status_valid = false;
pr_err("%s: error %d sending status command, %sing\n",
req->rq_disk->disk_name, err, retry ? "retry" : "abort");
}
/* We couldn't get a response from the card. Give up. */
if (err) {
/* Check if the card is removed */
if (mmc_detect_card_removed(card->host))
return ERR_NOMEDIUM;
return ERR_ABORT;
}
/* Flag ECC errors */
if ((status & R1_CARD_ECC_FAILED) ||
(brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
(brq->sbc.resp[0] & R1_CARD_ECC_FAILED) ||
(brq->que.resp[0] & R1_CARD_ECC_FAILED) ||
#endif
(brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
*ecc_err = true;
/* Flag General errors */
if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
if ((status & R1_ERROR) ||
(brq->stop.resp[0] & R1_ERROR)) {
pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
req->rq_disk->disk_name, __func__,
brq->stop.resp[0], status);
*gen_err = true;
}
/*
* Check the current card state. If it is in some data transfer
* mode, tell it to stop (and hopefully transition back to TRAN.)
*/
if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
R1_CURRENT_STATE(status) == R1_STATE_RCV) {
err = send_stop(card,
DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
req, gen_err, &stop_status);
if (err) {
pr_err("%s: error %d sending stop command\n",
req->rq_disk->disk_name, err);
/*
* If the stop cmd also timed out, the card is probably
* not present, so abort. Other errors are bad news too.
*/
return ERR_ABORT;
}
if (stop_status & R1_CARD_ECC_FAILED)
*ecc_err = true;
}
/* Check for set block count errors */
if (brq->sbc.error)
return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
prev_cmd_status_valid, status);
/* Check for r/w command errors */
if (brq->cmd.error)
return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
prev_cmd_status_valid, status);
/* Data errors */
if (!brq->stop.error)
return ERR_CONTINUE;
/* Now for stop errors. These aren't fatal to the transfer. */
pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
req->rq_disk->disk_name, brq->stop.error,
brq->cmd.resp[0], status);
/*
* Subsitute in our own stop status as this will give the error
* state which happened during the execution of the r/w command.
*/
if (stop_status) {
brq->stop.resp[0] = stop_status;
brq->stop.error = 0;
}
return ERR_CONTINUE;
}
static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
int type)
{
int err;
if (md->reset_done & type)
return -EEXIST;
md->reset_done |= type;
err = mmc_hw_reset(host);
#ifdef CONFIG_MTK_EMMC_HW_CQ
if (err && err != -EOPNOTSUPP) {
/* We failed to reset so we need to abort the request */
pr_notice("%s: %s: failed to reset %d\n", mmc_hostname(host),
__func__, err);
if (host->card && mmc_card_sd(host->card)) {
pr_notice("%s: %s removing bad card.\n",
mmc_hostname(host), __func__);
host->ops->remove_bad_sdcard(host);
}
return -ENODEV;
}
/* Ensure we switch back to the correct partition */
if (host->card) {
#else
if (err != -EOPNOTSUPP) {
#endif
struct mmc_blk_data *main_md =
dev_get_drvdata(&host->card->dev);
int part_err;
main_md->part_curr = main_md->part_type;
part_err = mmc_blk_part_switch(host->card, md->part_type);
if (part_err) {
/*
* We have failed to get back into the correct
* partition, so we need to abort the whole request.
*/
return -ENODEV;
}
}
return err;
}
static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
{
md->reset_done &= ~type;
}
#ifdef CONFIG_MTK_EMMC_HW_CQ
static struct mmc_cmdq_req *mmc_blk_cmdq_prep_discard_req(struct mmc_queue *mq,
struct request *req)
{
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
struct mmc_host *host = card->host;
struct mmc_cmdq_context_info *ctx_info = &host->cmdq_ctx;
struct mmc_cmdq_req *cmdq_req;
struct mmc_queue_req *active_mqrq;
WARN_ON(req->tag > card->ext_csd.cmdq_depth); /*bug*/
WARN_ON(test_and_set_bit(req->tag,
&host->cmdq_ctx.active_reqs)); /*bug*/
set_bit(CMDQ_STATE_DCMD_ACTIVE, &ctx_info->curr_state);
active_mqrq = &mq->mqrq_cmdq[req->tag];
active_mqrq->req = req;
cmdq_req = mmc_cmdq_prep_dcmd(active_mqrq, mq);
cmdq_req->cmdq_req_flags |= QBR;
cmdq_req->mrq.cmd = &cmdq_req->cmd;
cmdq_req->tag = req->tag;
return cmdq_req;
}
static int mmc_blk_cmdq_issue_discard_rq(struct mmc_queue *mq,
struct request *req)
{
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
struct mmc_cmdq_req *cmdq_req = NULL;
unsigned int from, nr, arg;
int err = 0;
if (!mmc_can_erase(card)) {
err = BLK_STS_NOTSUPP;
blk_end_request(req, err, blk_rq_bytes(req));
goto out;
}
from = blk_rq_pos(req);
nr = blk_rq_sectors(req);
if (mmc_can_discard(card))
arg = MMC_DISCARD_ARG;
else if (mmc_can_trim(card))
arg = MMC_TRIM_ARG;
else
arg = MMC_ERASE_ARG;
cmdq_req = mmc_blk_cmdq_prep_discard_req(mq, req);
if (card->quirks & MMC_QUIRK_INAND_CMD38) {
__mmc_switch_cmdq_mode(cmdq_req->mrq.cmd,
EXT_CSD_CMD_SET_NORMAL,
INAND_CMD38_ARG_EXT_CSD,
arg == MMC_TRIM_ARG ?
INAND_CMD38_ARG_TRIM :
INAND_CMD38_ARG_ERASE,
0, true, false);
err = mmc_cmdq_wait_for_dcmd(card->host, cmdq_req);
if (err)
goto clear_dcmd;
}
err = mmc_cmdq_erase(cmdq_req, card, from, nr, arg);
clear_dcmd:
if (err == -EBADSLT)
goto out;
blk_complete_request(req);
out:
return err ? 1 : 0;
}
#endif
/*
* The non-block commands come back from the block layer after it queued it and
* processed it with all other requests and then they get issued in this
* function.
*/
static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req)
{
struct mmc_queue_req *mq_rq;
struct mmc_card *card = mq->card;
struct mmc_blk_data *md = mq->blkdata;
struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
struct mmc_blk_ioc_data **idata;
bool rpmb_ioctl;
u8 **ext_csd;
u32 status;
int ret;
int i;
#if defined(CONFIG_MTK_EMMC_CQ_SUPPORT) || defined(CONFIG_MTK_EMMC_HW_CQ)
unsigned char cmdq_en;
cmdq_en = !!mmc_card_cmdq(card);
/* disable cmdq if partition doesn't support */
if (cmdq_en) {
ret = mmc_cmdq_disable(card);
if (ret) {
pr_notice("MMC ioctl:disable CQ fail %s\n", __func__);
return;
}
}
#endif
mq_rq = req_to_mmc_queue_req(req);
rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB);
switch (mq_rq->drv_op) {
case MMC_DRV_OP_IOCTL:
case MMC_DRV_OP_IOCTL_RPMB:
idata = mq_rq->drv_op_data;
for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) {
ret = __mmc_blk_ioctl_cmd(card, md, idata[i]);
if (ret)
break;
}
/* Always switch back to main area after RPMB access */
if (rpmb_ioctl)
mmc_blk_part_switch(card, 0);
break;
case MMC_DRV_OP_BOOT_WP:
ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
card->ext_csd.boot_ro_lock |
EXT_CSD_BOOT_WP_B_PWR_WP_EN,
card->ext_csd.part_time);
if (ret)
pr_err("%s: Locking boot partition ro until next power on failed: %d\n",
md->disk->disk_name, ret);
else
card->ext_csd.boot_ro_lock |=
EXT_CSD_BOOT_WP_B_PWR_WP_EN;
break;
case MMC_DRV_OP_GET_CARD_STATUS:
ret = mmc_send_status(card, &status);
if (!ret)
ret = status;
break;
case MMC_DRV_OP_GET_EXT_CSD:
ext_csd = mq_rq->drv_op_data;
ret = mmc_get_ext_csd(card, ext_csd);
break;
default:
pr_notice("%s: unknown driver specific operation:%d\n",
md->disk->disk_name, mq_rq->drv_op);
ret = -EINVAL;
break;
}
#if defined(CONFIG_MTK_EMMC_CQ_SUPPORT) || defined(CONFIG_MTK_EMMC_HW_CQ)
if (cmdq_en && main_md->part_curr <= PART_CMDQ_EN) {
ret = mmc_cmdq_enable(card);
if (ret) {
pr_notice("MMC ioctl:re-enable CQ fail %s\n", __func__);
return;
}
}
#endif
mq_rq->drv_op_result = ret;
blk_end_request_all(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
}
static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
{
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
unsigned int from, nr, arg;
int err = 0, type = MMC_BLK_DISCARD;
blk_status_t status = BLK_STS_OK;
if (!mmc_can_erase(card)) {
status = BLK_STS_NOTSUPP;
goto fail;
}
from = blk_rq_pos(req);
nr = blk_rq_sectors(req);
if (mmc_can_discard(card))
arg = MMC_DISCARD_ARG;
else if (mmc_can_trim(card))
arg = MMC_TRIM_ARG;
else
arg = MMC_ERASE_ARG;
do {
err = 0;
if (card->quirks & MMC_QUIRK_INAND_CMD38) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
INAND_CMD38_ARG_EXT_CSD,
arg == MMC_TRIM_ARG ?
INAND_CMD38_ARG_TRIM :
INAND_CMD38_ARG_ERASE,
card->ext_csd.generic_cmd6_time);
}
if (!err)
err = mmc_erase(card, from, nr, arg);
} while (err == -EIO && !mmc_blk_reset(md, card->host, type));
if (err)
status = BLK_STS_IOERR;
else
mmc_blk_reset_success(md, type);
fail:
blk_end_request(req, status, blk_rq_bytes(req));
}
#ifdef CONFIG_MTK_EMMC_HW_CQ
static int mmc_blk_cmdq_issue_secdiscard_rq(struct mmc_queue *mq,
struct request *req)
{
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
struct mmc_cmdq_req *cmdq_req = NULL;
unsigned int from, nr, arg;
int err = 0;
if (!(mmc_can_secure_erase_trim(card))) {
err = BLK_STS_NOTSUPP;
blk_end_request(req, err, blk_rq_bytes(req));
goto out;
}
from = blk_rq_pos(req);
nr = blk_rq_sectors(req);
if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
arg = MMC_SECURE_TRIM1_ARG;
else
arg = MMC_SECURE_ERASE_ARG;
cmdq_req = mmc_blk_cmdq_prep_discard_req(mq, req);
if (card->quirks & MMC_QUIRK_INAND_CMD38) {
__mmc_switch_cmdq_mode(cmdq_req->mrq.cmd,
EXT_CSD_CMD_SET_NORMAL,
INAND_CMD38_ARG_EXT_CSD,
arg == MMC_SECURE_TRIM1_ARG ?
INAND_CMD38_ARG_SECTRIM1 :
INAND_CMD38_ARG_SECERASE,
0, true, false);
err = mmc_cmdq_wait_for_dcmd(card->host, cmdq_req);
if (err)
goto clear_dcmd;
}
err = mmc_cmdq_erase(cmdq_req, card, from, nr, arg);
if (err)
goto clear_dcmd;
if (arg == MMC_SECURE_TRIM1_ARG) {
if (card->quirks & MMC_QUIRK_INAND_CMD38) {
__mmc_switch_cmdq_mode(cmdq_req->mrq.cmd,
EXT_CSD_CMD_SET_NORMAL,
INAND_CMD38_ARG_EXT_CSD,
INAND_CMD38_ARG_SECTRIM2,
0, true, false);
err = mmc_cmdq_wait_for_dcmd(card->host, cmdq_req);
if (err)
goto clear_dcmd;
}
err = mmc_cmdq_erase(cmdq_req, card, from, nr,
MMC_SECURE_TRIM2_ARG);
}
clear_dcmd:
if (err == -EBADSLT)
goto out;
blk_complete_request(req);
out:
return err ? 1 : 0;
}
#endif
static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
struct request *req)
{
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
unsigned int from, nr, arg;
int err = 0, type = MMC_BLK_SECDISCARD;
blk_status_t status = BLK_STS_OK;
if (!(mmc_can_secure_erase_trim(card))) {
status = BLK_STS_NOTSUPP;
goto out;
}
from = blk_rq_pos(req);
nr = blk_rq_sectors(req);
if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
arg = MMC_SECURE_TRIM1_ARG;
else
arg = MMC_SECURE_ERASE_ARG;
retry:
if (card->quirks & MMC_QUIRK_INAND_CMD38) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
INAND_CMD38_ARG_EXT_CSD,
arg == MMC_SECURE_TRIM1_ARG ?
INAND_CMD38_ARG_SECTRIM1 :
INAND_CMD38_ARG_SECERASE,
card->ext_csd.generic_cmd6_time);
if (err)
goto out_retry;
}
err = mmc_erase(card, from, nr, arg);
if (err == -EIO)
goto out_retry;
if (err) {
status = BLK_STS_IOERR;
goto out;
}
if (arg == MMC_SECURE_TRIM1_ARG) {
if (card->quirks & MMC_QUIRK_INAND_CMD38) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
INAND_CMD38_ARG_EXT_CSD,
INAND_CMD38_ARG_SECTRIM2,
card->ext_csd.generic_cmd6_time);
if (err)
goto out_retry;
}
err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
if (err == -EIO)
goto out_retry;
if (err) {
status = BLK_STS_IOERR;
goto out;
}
}
out_retry:
if (err && !mmc_blk_reset(md, card->host, type))
goto retry;
if (!err)
mmc_blk_reset_success(md, type);
out:
blk_end_request(req, status, blk_rq_bytes(req));
}
static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
{
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
int ret = 0;
ret = mmc_flush_cache(card);
blk_end_request_all(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
}
/*
* Reformat current write as a reliable write, supporting
* both legacy and the enhanced reliable write MMC cards.
* In each transfer we'll handle only as much as a single
* reliable write can handle, thus finish the request in
* partial completions.
*/
static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
struct mmc_card *card,
struct request *req)
{
if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
/* Legacy mode imposes restrictions on transfers. */
if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors))
brq->data.blocks = 1;
if (brq->data.blocks > card->ext_csd.rel_sectors)
brq->data.blocks = card->ext_csd.rel_sectors;
else if (brq->data.blocks < card->ext_csd.rel_sectors)
brq->data.blocks = 1;
}
}
#define CMD_ERRORS \
(R1_OUT_OF_RANGE | /* Command argument out of range */ \
R1_ADDRESS_ERROR | /* Misaligned address */ \
R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
R1_WP_VIOLATION | /* Tried to write to protected block */ \
R1_CARD_ECC_FAILED | /* Card ECC failed */ \
R1_CC_ERROR | /* Card controller error */ \
R1_ERROR) /* General/unknown error */
static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq)
{
u32 val;
/*
* Per the SD specification(physical layer version 4.10)[1],
* section 4.3.3, it explicitly states that "When the last
* block of user area is read using CMD18, the host should
* ignore OUT_OF_RANGE error that may occur even the sequence
* is correct". And JESD84-B51 for eMMC also has a similar
* statement on section 6.8.3.
*
* Multiple block read/write could be done by either predefined
* method, namely CMD23, or open-ending mode. For open-ending mode,
* we should ignore the OUT_OF_RANGE error as it's normal behaviour.
*
* However the spec[1] doesn't tell us whether we should also
* ignore that for predefined method. But per the spec[1], section
* 4.15 Set Block Count Command, it says"If illegal block count
* is set, out of range error will be indicated during read/write
* operation (For example, data transfer is stopped at user area
* boundary)." In another word, we could expect a out of range error
* in the response for the following CMD18/25. And if argument of
* CMD23 + the argument of CMD18/25 exceed the max number of blocks,
* we could also expect to get a -ETIMEDOUT or any error number from
* the host drivers due to missing data response(for write)/data(for
* read), as the cards will stop the data transfer by itself per the
* spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode.
*/
if (!brq->stop.error) {
bool oor_with_open_end;
/* If there is no error yet, check R1 response */
val = brq->stop.resp[0] & CMD_ERRORS;
oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc;
if (val && !oor_with_open_end)
brq->stop.error = -EIO;
}
}
static enum mmc_blk_status mmc_blk_err_check(struct mmc_card *card,
struct mmc_async_req *areq)
{
struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
areq);
struct mmc_blk_request *brq = &mq_mrq->brq;
struct request *req = mmc_queue_req_to_req(mq_mrq);
int need_retune = card->host->need_retune;
bool ecc_err = false;
bool gen_err = false;
bool cmdq_en = false;
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
cmdq_en = mmc_card_cmdq(card);
#endif
/*
* sbc.error indicates a problem with the set block count
* command. No data will have been transferred.
*
* cmd.error indicates a problem with the r/w command. No
* data will have been transferred.
*
* stop.error indicates a problem with the stop command. Data
* may have been transferred, or may still be transferring.
*/
if (!cmdq_en) {
mmc_blk_eval_resp_error(brq);
if (brq->sbc.error || brq->cmd.error ||
brq->stop.error || brq->data.error) {
switch (mmc_blk_cmd_recovery(card,
req, brq, &ecc_err, &gen_err)) {
case ERR_RETRY:
return MMC_BLK_RETRY;
case ERR_ABORT:
return MMC_BLK_ABORT;
case ERR_NOMEDIUM:
return MMC_BLK_NOMEDIUM;
case ERR_CONTINUE:
break;
}
}
}
/*
* Check for errors relating to the execution of the
* initial command - such as address errors. No data
* has been transferred.
*/
if (brq->cmd.resp[0] & CMD_ERRORS) {
pr_err("%s: r/w command failed, status = %#x\n",
req->rq_disk->disk_name, brq->cmd.resp[0]);
return MMC_BLK_ABORT;
}
/*
* Everything else is either success, or a data error of some
* kind. If it was a write, we may have transitioned to
* program mode, which we have to wait for it to complete.
*/
if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ
&& !cmdq_en) {
int err;
/* Check stop command response */
if (brq->stop.resp[0] & R1_ERROR) {
pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
req->rq_disk->disk_name, __func__,
brq->stop.resp[0]);
gen_err = true;
}
err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
&gen_err);
if (err)
return MMC_BLK_CMD_ERR;
}
/* if general error occurs, retry the write operation. */
if (gen_err) {
pr_warn("%s: retrying write for general error\n",
req->rq_disk->disk_name);
return MMC_BLK_RETRY;
}
/* Some errors (ECC) are flagged on the next commmand, so check stop, too */
if (brq->data.error || brq->stop.error) {
if (need_retune && !brq->retune_retry_done) {
pr_debug("%s: retrying because a re-tune was needed\n",
req->rq_disk->disk_name);
brq->retune_retry_done = 1;
return MMC_BLK_RETRY;
}
pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
req->rq_disk->disk_name, brq->data.error ?: brq->stop.error,
(unsigned)blk_rq_pos(req),
(unsigned)blk_rq_sectors(req),
brq->cmd.resp[0], brq->stop.resp[0]);
if (rq_data_dir(req) == READ) {
if (ecc_err)
return MMC_BLK_ECC_ERR;
return MMC_BLK_DATA_ERR;
} else {
return MMC_BLK_CMD_ERR;
}
}
if (!brq->data.bytes_xfered)
return MMC_BLK_RETRY;
if (blk_rq_bytes(req) != brq->data.bytes_xfered)
return MMC_BLK_PARTIAL;
return MMC_BLK_SUCCESS;
}
static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
int disable_multi, bool *do_rel_wr,
bool *do_data_tag)
{
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
struct mmc_blk_request *brq = &mqrq->brq;
struct request *req = mmc_queue_req_to_req(mqrq);
/*
* Reliable writes are used to implement Forced Unit Access and
* are supported only on MMCs.
*/
*do_rel_wr = (req->cmd_flags & REQ_FUA) &&
rq_data_dir(req) == WRITE &&
(md->flags & MMC_BLK_REL_WR);
memset(brq, 0, sizeof(struct mmc_blk_request));
/* mmc_crypto_prepare_req(mqrq); */
brq->mrq.data = &brq->data;
brq->stop.opcode = MMC_STOP_TRANSMISSION;
brq->stop.arg = 0;
if (rq_data_dir(req) == READ) {
brq->data.flags = MMC_DATA_READ;
brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
} else {
brq->data.flags = MMC_DATA_WRITE;
brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
}
brq->data.blksz = 512;
brq->data.blocks = blk_rq_sectors(req);
/*
* The block layer doesn't support all sector count
* restrictions, so we need to be prepared for too big
* requests.
*/
if (brq->data.blocks > card->host->max_blk_count)
brq->data.blocks = card->host->max_blk_count;
if (brq->data.blocks > 1) {
/*
* Some SD cards in SPI mode return a CRC error or even lock up
* completely when trying to read the last block using a
* multiblock read command.
*/
if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) &&
(blk_rq_pos(req) + blk_rq_sectors(req) ==
get_capacity(md->disk)))
brq->data.blocks--;
/*
* After a read error, we redo the request one sector
* at a time in order to accurately determine which
* sectors can be read successfully.
*/
if (disable_multi)
brq->data.blocks = 1;
/*
* Some controllers have HW issues while operating
* in multiple I/O mode
*/
if (card->host->ops->multi_io_quirk)
brq->data.blocks = card->host->ops->multi_io_quirk(card,
(rq_data_dir(req) == READ) ?
MMC_DATA_READ : MMC_DATA_WRITE,
brq->data.blocks);
}
if (*do_rel_wr)
mmc_apply_rel_rw(brq, card, req);
/*
* Data tag is used only during writing meta data to speed
* up write and any subsequent read of this meta data
*/
*do_data_tag = card->ext_csd.data_tag_unit_size &&
(req->cmd_flags & REQ_META) &&
(rq_data_dir(req) == WRITE) &&
((brq->data.blocks * brq->data.blksz) >=
card->ext_csd.data_tag_unit_size);
mmc_set_data_timeout(&brq->data, card);
brq->data.sg = mqrq->sg;
brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
/*
* Adjust the sg list so it is the same size as the
* request.
*/
if (brq->data.blocks != blk_rq_sectors(req)) {
int i, data_size = brq->data.blocks << 9;
struct scatterlist *sg;
for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
data_size -= sg->length;
if (data_size <= 0) {
sg->length += data_size;
i++;
break;
}
}
brq->data.sg_len = i;
}
mqrq->areq.mrq = &brq->mrq;
}
static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
struct mmc_card *card,
int disable_multi,
struct mmc_queue *mq)
{
u32 readcmd, writecmd;
struct mmc_blk_request *brq = &mqrq->brq;
struct request *req = mmc_queue_req_to_req(mqrq);
struct mmc_blk_data *md = mq->blkdata;
bool do_rel_wr, do_data_tag;
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
bool cmdq_en = mmc_card_cmdq(card);
#endif
mmc_blk_data_prep(mq, mqrq, disable_multi, &do_rel_wr, &do_data_tag);
brq->mrq.cmd = &brq->cmd;
brq->cmd.arg = blk_rq_pos(req);
if (!mmc_card_blockaddr(card))
brq->cmd.arg <<= 9;
brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
if (brq->data.blocks > 1 || do_rel_wr) {
/* SPI multiblock writes terminate using a special
* token, not a STOP_TRANSMISSION request.
*/
if (!mmc_host_is_spi(card->host) ||
rq_data_dir(req) == READ)
brq->mrq.stop = &brq->stop;
readcmd = MMC_READ_MULTIPLE_BLOCK;
writecmd = MMC_WRITE_MULTIPLE_BLOCK;
} else {
brq->mrq.stop = NULL;
readcmd = MMC_READ_SINGLE_BLOCK;
writecmd = MMC_WRITE_BLOCK;
}
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
if (cmdq_en) {
readcmd = MMC_EXECUTE_READ_TASK;
writecmd = MMC_EXECUTE_WRITE_TASK;
}
#endif
brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd;
/*
* Pre-defined multi-block transfers are preferable to
* open ended-ones (and necessary for reliable writes).
* However, it is not sufficient to just send CMD23,
* and avoid the final CMD12, as on an error condition
* CMD12 (stop) needs to be sent anyway. This, coupled
* with Auto-CMD23 enhancements provided by some
* hosts, means that the complexity of dealing
* with this is best left to the host. If CMD23 is
* supported by card and host, we'll fill sbc in and let
* the host deal with handling it correctly. This means
* that for hosts that don't expose MMC_CAP_CMD23, no
* change of behavior will be observed.
*
* N.B: Some MMC cards experience perf degradation.
* We'll avoid using CMD23-bounded multiblock writes for
* these, while retaining features like reliable writes.
*/
if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
(do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
do_data_tag)) {
brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
brq->sbc.arg = brq->data.blocks |
(do_rel_wr ? (1 << 31) : 0) |
(do_data_tag ? (1 << 29) : 0);
brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
brq->mrq.sbc = &brq->sbc;
}
mqrq->areq.err_check = mmc_blk_err_check;
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
if (cmdq_en) {
int rt = IS_RT_CLASS_REQ(req);
brq->mrq.flags = rt;
brq->mrq_que.flags = rt;
brq->sbc.opcode = MMC_QUE_TASK_PARAMS;
brq->sbc.arg = brq->data.blocks |
(do_rel_wr ? (1 << 31) : 0) |
((rq_data_dir(req) == WRITE) ? 0 : (1 << 30)) |
(do_data_tag ? (1 << 29) : 0) |
(rt << 23) | ((atomic_read(&mqrq->index) - 1) << 16);
brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
brq->mrq_que.sbc = &brq->sbc;
brq->que.opcode = MMC_QUE_TASK_ADDR;
brq->que.arg = blk_rq_pos(req);
if (!mmc_card_blockaddr(card))
brq->que.arg <<= 9;
brq->que.flags = MMC_RSP_R1 | MMC_CMD_AC;
brq->mrq_que.cmd = &brq->que;
brq->cmd.arg = (atomic_read(&mqrq->index) - 1) << 16;
mqrq->areq.mrq_que = &brq->mrq_que;
brq->mrq.areq = &mqrq->areq;
brq->mrq_que.areq = &mqrq->areq;
}
#endif
if (req->bio)
brq->mrq.req = req;
#if defined(CONFIG_MTK_HW_FDE)
/* request is from mmc layer */
brq->mrq.is_mmc_req = true;
#endif
}
static bool mmc_blk_rw_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
struct mmc_blk_request *brq, struct request *req,
bool old_req_pending)
{
bool req_pending;
/*
* If this is an SD card and we're writing, we can first
* mark the known good sectors as ok.
*
* If the card is not SD, we can still ok written sectors
* as reported by the controller (which might be less than
* the real number of written sectors, but never more).
*/
if (mmc_card_sd(card)) {
u32 blocks;
int err;
err = mmc_sd_num_wr_blocks(card, &blocks);
if (err)
req_pending = old_req_pending;
else
req_pending = blk_end_request(req, BLK_STS_OK, blocks << 9);
} else {
req_pending = blk_end_request(req, BLK_STS_OK, brq->data.bytes_xfered);
}
return req_pending;
}
static void mmc_blk_rw_cmd_abort(struct mmc_queue *mq, struct mmc_card *card,
struct request *req,
struct mmc_queue_req *mqrq)
{
if (mmc_card_removed(card))
req->rq_flags |= RQF_QUIET;
while (blk_end_request(req, BLK_STS_IOERR, blk_rq_cur_bytes(req)));
atomic_dec(&mq->qcnt);
}
/**
* mmc_blk_rw_try_restart() - tries to restart the current async request
* @mq: the queue with the card and host to restart
* @req: a new request that want to be started after the current one
*/
static void mmc_blk_rw_try_restart(struct mmc_queue *mq, struct request *req,
struct mmc_queue_req *mqrq)
{
if (!req)
return;
/*
* If the card was removed, just cancel everything and return.
*/
if (mmc_card_removed(mq->card)) {
req->rq_flags |= RQF_QUIET;
blk_end_request_all(req, BLK_STS_IOERR);
atomic_dec(&mq->qcnt); /* FIXME: just set to 0? */
return;
}
/* Else proceed and try to restart the current async request */
mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq);
mmc_start_areq(mq->card->host, &mqrq->areq, NULL);
}
#ifdef CONFIG_MTK_EMMC_HW_CQ
static int mmc_blk_cmdq_start_req(struct mmc_host *host,
struct mmc_cmdq_req *cmdq_req)
{
struct mmc_request *mrq = &cmdq_req->mrq;
mrq->done = mmc_blk_cmdq_req_done;
return mmc_cmdq_start_req(host, cmdq_req);
}
/* prepare for non-data commands */
static struct mmc_cmdq_req *mmc_cmdq_prep_dcmd(
struct mmc_queue_req *mqrq, struct mmc_queue *mq)
{
struct request *req = mqrq->req;
struct mmc_cmdq_req *cmdq_req = &mqrq->cmdq_req;
memset(&mqrq->cmdq_req, 0, sizeof(struct mmc_cmdq_req));
cmdq_req->mrq.data = NULL;
cmdq_req->cmd_flags = req->cmd_flags;
cmdq_req->mrq.req = mqrq->req;
req->special = mqrq;
cmdq_req->cmdq_req_flags |= DCMD;
cmdq_req->mrq.cmdq_req = cmdq_req;
return &mqrq->cmdq_req;
}
static struct mmc_cmdq_req *mmc_blk_cmdq_rw_prep(
struct mmc_queue_req *mqrq, struct mmc_queue *mq)
{
struct mmc_card *card = mq->card;
struct request *req = mqrq->req;
struct mmc_blk_data *md = mq->blkdata;
bool do_rel_wr = mmc_req_rel_wr(req) && (md->flags & MMC_BLK_REL_WR);
bool do_data_tag;
bool read_dir = (rq_data_dir(req) == READ);
bool prio = IS_RT_CLASS_REQ(req);
struct mmc_cmdq_req *cmdq_rq = &mqrq->cmdq_req;
memset(&mqrq->cmdq_req, 0, sizeof(struct mmc_cmdq_req));
cmdq_rq->tag = req->tag;
if (read_dir) {
cmdq_rq->cmdq_req_flags |= DIR;
cmdq_rq->data.flags = MMC_DATA_READ;
} else {
cmdq_rq->data.flags = MMC_DATA_WRITE;
}
if (prio)
cmdq_rq->cmdq_req_flags |= PRIO;
if (do_rel_wr)
cmdq_rq->cmdq_req_flags |= REL_WR;
cmdq_rq->data.blocks = blk_rq_sectors(req);
cmdq_rq->blk_addr = blk_rq_pos(req);
/* MMC sector size */
cmdq_rq->data.blksz = 512;
mmc_set_data_timeout(&cmdq_rq->data, card);
do_data_tag = (card->ext_csd.data_tag_unit_size) &&
(req->cmd_flags & REQ_META) &&
(rq_data_dir(req) == WRITE) &&
((cmdq_rq->data.blocks * cmdq_rq->data.blksz) >=
card->ext_csd.data_tag_unit_size);
if (do_data_tag)
cmdq_rq->cmdq_req_flags |= DAT_TAG;
cmdq_rq->data.sg = mqrq->sg;
cmdq_rq->data.sg_len = mmc_cmdq_queue_map_sg(mq, mqrq);
/*
* Adjust the sg list so it is the same size as the
* request.
*/
if (cmdq_rq->data.blocks > card->host->max_blk_count)
cmdq_rq->data.blocks = card->host->max_blk_count;
if (cmdq_rq->data.blocks != blk_rq_sectors(req)) {
int i, data_size = cmdq_rq->data.blocks << 9;
struct scatterlist *sg;
for_each_sg(cmdq_rq->data.sg, sg, cmdq_rq->data.sg_len, i) {
data_size -= sg->length;
if (data_size <= 0) {
sg->length += data_size;
i++;
break;
}
}
cmdq_rq->data.sg_len = i;
}
mqrq->cmdq_req.cmd_flags = req->cmd_flags;
mqrq->cmdq_req.mrq.req = mqrq->req;
mqrq->cmdq_req.mrq.cmdq_req = &mqrq->cmdq_req;
mqrq->cmdq_req.mrq.data = &mqrq->cmdq_req.data;
mqrq->req->special = mqrq;
/*
* Although keep it should work normally, but only
* call it in CQHCI for safe, SWcmdq will do this in
* mmc_blk_swcq_issue_rw_rq().
*/
#ifdef CONFIG_MTK_EMMC_HW_CQ
mmc_crypto_prepare_req(mqrq);
#endif
#ifdef MMC_CQHCI_DEBUG
pr_debug("%s: %s: mrq: 0x%p, req: 0x%p, mqrq: 0x%p, bytes to xf: %d, tag: %d, mmc_cmdq_req: 0x%p, card-addr: 0x%08x, dir(r-1/w-0): %d\n",
mmc_hostname(card->host), __func__, &mqrq->cmdq_req.mrq,
mqrq->req, mqrq,
(cmdq_rq->data.blocks * cmdq_rq->data.blksz),
cmdq_rq->tag,
cmdq_rq, cmdq_rq->blk_addr,
(cmdq_rq->cmdq_req_flags & DIR) ? 1 : 0);
#endif
return &mqrq->cmdq_req;
}
static int mmc_blk_cmdq_issue_rw_rq(struct mmc_queue *mq, struct request *req)
{
struct mmc_queue_req *active_mqrq;
struct mmc_card *card = mq->card;
struct mmc_host *host = card->host;
struct mmc_cmdq_req *mc_rq;
u8 active_small_sector_read = 0;
int ret = 0;
WARN_ON((req->tag < 0) ||
(req->tag > card->ext_csd.cmdq_depth)); /*bug*/
WARN_ON(test_and_set_bit(req->tag,
&host->cmdq_ctx.data_active_reqs)); /*bug*/
WARN_ON(test_and_set_bit(req->tag,
&host->cmdq_ctx.active_reqs)); /*bug*/
active_mqrq = &mq->mqrq_cmdq[req->tag];
active_mqrq->req = req;
mc_rq = mmc_blk_cmdq_rw_prep(active_mqrq, mq);
if (card->quirks & MMC_QUIRK_CMDQ_EMPTY_BEFORE_DCMD) {
unsigned int sectors = blk_rq_sectors(req);
if (((sectors > 0) && (sectors < 8))
&& (rq_data_dir(req) == READ))
active_small_sector_read = 1;
}
mt_biolog_cqhci_queue_task(mc_rq->mrq.req->tag,
&mc_rq->mrq);
ret = mmc_blk_cmdq_start_req(card->host, mc_rq);
if (!ret && active_small_sector_read)
host->cmdq_ctx.active_small_sector_read_reqs++;
return ret;
}
/*
* Issues a flush (dcmd) request
*/
int mmc_blk_cmdq_issue_flush_rq(struct mmc_queue *mq, struct request *req)
{
int err;
struct mmc_queue_req *active_mqrq;
struct mmc_card *card = mq->card;
struct mmc_host *host;
struct mmc_cmdq_req *cmdq_req;
struct mmc_cmdq_context_info *ctx_info;
host = card->host;
WARN_ON(req->tag > card->ext_csd.cmdq_depth); /*bug*/
WARN_ON(test_and_set_bit(req->tag,
&host->cmdq_ctx.active_reqs)); /*bug*/
ctx_info = &host->cmdq_ctx;
set_bit(CMDQ_STATE_DCMD_ACTIVE, &ctx_info->curr_state);
active_mqrq = &mq->mqrq_cmdq[req->tag];
active_mqrq->req = req;
cmdq_req = mmc_cmdq_prep_dcmd(active_mqrq, mq);
cmdq_req->cmdq_req_flags |= QBR;
cmdq_req->mrq.cmd = &cmdq_req->cmd;
cmdq_req->tag = req->tag;
err = mmc_cmdq_prepare_flush(cmdq_req->mrq.cmd);
if (err) {
pr_notice("%s: failed (%d) preparing flush req\n",
mmc_hostname(host), err);
return err;
}
err = mmc_blk_cmdq_start_req(card->host, cmdq_req);
return err;
}
EXPORT_SYMBOL(mmc_blk_cmdq_issue_flush_rq);
static int mmc_blk_cmdq_recovery(struct mmc_host *host)
{
int retry = 0;
bool gen_err = 0;
u32 status;
struct mmc_request *mrq = host->err_mrq;
struct mmc_card *card = host->card;
unsigned long timeout;
int err;
for (retry = 0; retry < 5; retry++) {
err = __mmc_send_status(card, &status, 0);
if (!err)
break;
}
pr_notice("%s: status = 0x%x\n",
mmc_hostname(host), status);
if (err) {
pr_notice("%s: No response from card !!!\n",
mmc_hostname(host));
goto out;
}
if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
R1_CURRENT_STATE(status) == R1_STATE_RCV) {
pr_notice("%s: status = 0x%x need send stop\n",
mmc_hostname(host), status);
err = send_stop(card,
DIV_ROUND_UP(mrq->data->timeout_ns, 1000000),
mrq->req, &gen_err, &status);
if (err) {
pr_notice("%s: error %d sending stop (%d) command\n",
mrq->req->rq_disk->disk_name,
err, status);
goto out;
}
}
timeout = jiffies + msecs_to_jiffies(3 * 1000);
while (R1_CURRENT_STATE(status) != R1_STATE_TRAN) {
int err = __mmc_send_status(card, &status, 5);
if (!err)
break;
/* Timeout if the device never becomes ready for data
* and never leaves the program state.
*/
if (time_after(jiffies, timeout)) {
pr_notice("%s: Card wait trans timeout %s\n",
mmc_hostname(card->host),
__func__);
err = -ETIMEDOUT;
break;
}
};
out:
return err;
}
static void mmc_blk_cmdq_reset(struct mmc_host *host, bool clear_all)
{
int err = 0;
if (mmc_cmdq_halt(host, true)) {
pr_notice("%s: halt failed\n", mmc_hostname(host));
goto reset;
}
if (clear_all)
mmc_cmdq_discard_queue(host, 0);
reset:
host->cmdq_ops->disable(host, true);
err = mmc_cmdq_hw_reset(host);
if (err && err != -EOPNOTSUPP) {
pr_notice("%s: failed to cmdq_hw_reset err = %d\n",
mmc_hostname(host), err);
host->cmdq_ops->enable(host);
mmc_cmdq_halt(host, false);
goto out;
}
/*
* CMDQ HW reset would have already made CQE
* in unhalted state, but reflect the same
* in software state of cmdq_ctx.
*/
mmc_host_clr_halt(host);
out:
return;
}
/**
* is_cmdq_dcmd_req - Checks if tag belongs to DCMD request.
* @q: request_queue pointer.
* @tag: tag number of request to check.
*
* This function checks if the request with tag number "tag"
* is a DCMD request or not based on cmdq_req_flags set.
*
* returns true if DCMD req, otherwise false.
*/
static bool is_cmdq_dcmd_req(struct request_queue *q, int tag)
{
struct request *req;
struct mmc_queue_req *mq_rq;
struct mmc_cmdq_req *cmdq_req;
req = blk_queue_find_tag(q, tag);
if (WARN_ON(!req))
goto out;
mq_rq = req->special;
if (WARN_ON(!mq_rq))
goto out;
cmdq_req = &(mq_rq->cmdq_req);
return (cmdq_req->cmdq_req_flags & DCMD);
out:
return -ENOENT;
}
static void mmc_cmdq_dcmd_reset(struct request_queue *q, int tag)
{
struct request *req;
struct mmc_queue_req *mq_rq;
struct mmc_cmdq_req *cmdq_req;
struct mmc_request *mrq;
req = blk_queue_find_tag(q, tag);
if (WARN_ON(!req))
return;
mq_rq = req->special;
if (WARN_ON(!mq_rq))
return;
cmdq_req = &(mq_rq->cmdq_req);
mrq = &cmdq_req->mrq;
if (mrq && !completion_done(&mrq->completion)) {
pr_info("%s: discard req reset done\n", __func__);
mrq->cmd->error = -EBADSLT;
mrq->done(mrq);
}
}
/**
* mmc_blk_cmdq_reset_all - Reset everything for CMDQ block request.
* @host: mmc_host pointer.
* @err: error for which reset is performed.
*
* This function implements reset_all functionality for
* cmdq. It resets the controller, power cycle the card,
* and invalidate all busy tags(requeue all request back to
* elevator).
*/
static void mmc_blk_cmdq_reset_all(struct mmc_host *host, int err)
{
struct mmc_request *mrq = host->err_mrq;
struct mmc_card *card = host->card;
struct mmc_cmdq_context_info *ctx_info = &host->cmdq_ctx;
struct request_queue *q;
int itag = 0;
int ret = 0;
if (WARN_ON(!mrq))
return;
q = mrq->req->q;
WARN_ON(!test_bit(CMDQ_STATE_ERR, &ctx_info->curr_state));
pr_notice("%s: %s: active_reqs = 0x%lx\n",
mmc_hostname(host), __func__,
ctx_info->active_reqs);
/* Bring device back to TRAN state */
ret = mmc_blk_cmdq_recovery(host);
/* Try to discard entire queue */
if (!ret)
ret = mmc_cmdq_discard_queue(host, 0);
/*
* If recovery or discard fail, reset device.
* If discard success, reset host.
*/
if (ret)
mmc_blk_cmdq_reset(host, false);
else
host->cmdq_ops->reset(host, true);
for_each_set_bit(itag, &ctx_info->active_reqs,
host->num_cq_slots) {
ret = is_cmdq_dcmd_req(q, itag);
if (WARN_ON(ret == -ENOENT))
continue;
if (!ret) {
WARN_ON(!test_and_clear_bit(itag,
&ctx_info->data_active_reqs));
mmc_cmdq_post_req(host, itag, err);
} else {
mmc_cmdq_dcmd_reset(q, itag);
clear_bit(CMDQ_STATE_DCMD_ACTIVE,
&ctx_info->curr_state);
}
WARN_ON(!test_and_clear_bit(itag,
&ctx_info->active_reqs));
pr_notice("%s: %s: clear active_reqs itag = %d\n",
mmc_hostname(host), __func__,
itag);
mmc_put_card(card);
}
spin_lock_irq(q->queue_lock);
blk_queue_invalidate_tags(q);
spin_unlock_irq(q->queue_lock);
}
static void mmc_blk_cmdq_shutdown(struct mmc_queue *mq)
{
int err;
struct mmc_card *card = mq->card;
struct mmc_host *host = card->host;
mmc_get_card(card);
err = mmc_cmdq_halt(host, true);
if (err) {
pr_notice("%s: halt: failed: %d\n", __func__, err);
goto out;
}
/* disable CQ mode in card */
if (mmc_card_cmdq(card)) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_CMDQ_MODE_EN, 0,
card->ext_csd.generic_cmd6_time);
if (err) {
pr_notice("%s: failed to switch card to legacy mode: %d\n",
__func__, err);
goto out;
}
mmc_card_clr_cmdq(card);
}
host->cmdq_ops->disable(host, false);
host->card->cqe_init = false;
out:
mmc_put_card(card);
}
static enum blk_eh_timer_return mmc_blk_cmdq_req_timed_out(struct request *req)
{
struct mmc_queue *mq = req->q->queuedata;
struct mmc_host *host = mq->card->host;
struct mmc_queue_req *mq_rq = req->special;
struct mmc_request *mrq;
struct mmc_cmdq_req *cmdq_req;
struct mmc_cmdq_context_info *ctx_info = &host->cmdq_ctx;
if (host->cmdq_ops->dumpstate)
host->cmdq_ops->dumpstate(host, true);
/*
* The mmc_queue_req will be present only if the request
* is issued to the LLD. The request could be fetched from
* block layer queue but could be waiting to be issued
* (for e.g. clock scaling is waiting for an empty cmdq queue)
* Reset the timer in such cases to give LLD more time
*/
if (!mq_rq) {
pr_notice("%s: restart timer for tag: %d\n",
__func__, req->tag);
return BLK_EH_RESET_TIMER;
}
mrq = &mq_rq->cmdq_req.mrq;
cmdq_req = &mq_rq->cmdq_req;
WARN_ON(!mrq || !cmdq_req); /*bug*/
if (cmdq_req->cmdq_req_flags & DCMD)
mrq->cmd->error = -ETIMEDOUT;
else
mrq->data->error = -ETIMEDOUT;
if (mrq->cmd && mrq->cmd->error) {
if (!(mrq->req->cmd_flags & REQ_PREFLUSH)) {
/*
* Notify completion for non flush commands like
* discard that wait for DCMD finish.
*/
set_bit(CMDQ_STATE_REQ_TIMED_OUT,
&ctx_info->curr_state);
complete(&mrq->completion);
return BLK_EH_NOT_HANDLED;
}
}
if (test_bit(CMDQ_STATE_REQ_TIMED_OUT, &ctx_info->curr_state) ||
test_bit(CMDQ_STATE_ERR, &ctx_info->curr_state))
return BLK_EH_NOT_HANDLED;
set_bit(CMDQ_STATE_REQ_TIMED_OUT, &ctx_info->curr_state);
return BLK_EH_HANDLED;
}
/*
* mmc_blk_cmdq_err: error handling of cmdq error requests.
* Function should be called in context of error out request
* which has claim_host and rpm acquired.
* This may be called with CQ engine halted. Make sure to
* unhalt it after error recovery.
*
* TODO: Currently cmdq error handler does reset_all in case
* of any erorr. Need to optimize error handling.
*/
static void mmc_blk_cmdq_err(struct mmc_queue *mq)
{
struct mmc_host *host = mq->card->host;
struct mmc_request *mrq = host->err_mrq;
struct mmc_cmdq_context_info *ctx_info = &host->cmdq_ctx;
struct request_queue *q;
int err, ret;
u32 status = 0;
if (WARN_ON(!mrq))
return;
pr_notice("%s: %s err req = %p, err tag = %d\n",
mmc_hostname(host), __func__, mrq->req, mrq->req->tag);
if (host->cmdq_ops->dumpstate && !mrq->cmdq_req->skip_dump)
host->cmdq_ops->dumpstate(host, true);
down_write(&ctx_info->err_rwsem);
pr_notice("%s: %s Starting cmdq Error handler\n",
mmc_hostname(host), __func__);
q = mrq->req->q;
err = mmc_cmdq_halt(host, true);
if (err) {
pr_notice("%s halt failed: %d\n", mmc_hostname(host), err);
goto reset;
}
/* RED error - Fatal: requires reset */
if (mrq->cmdq_req->resp_err) {
err = mrq->cmdq_req->resp_err;
pr_notice("%s: Response error detected: Device in bad state\n",
mmc_hostname(host));
goto reset;
}
/*
* TIMEOUT errrors can happen because of execution error
* in the last command. So send cmd 13 to get device status
*/
if ((mrq->cmd && (mrq->cmd->error == -ETIMEDOUT)) ||
(mrq->data && (mrq->data->error == -ETIMEDOUT))) {
if (mmc_host_halt(host) || mmc_host_cq_disable(host)) {
ret = __mmc_send_status(host->card, &status, 0);
if (ret)
pr_notice("%s: CMD13 failed with err %d\n",
mmc_hostname(host), ret);
}
pr_notice("%s: Timeout error detected with device status 0x%08x\n",
mmc_hostname(host), status);
}
/*
* In case of software request time-out, we schedule err work only for
* the first error out request and handles all other request in flight
* here.
*/
if (test_bit(CMDQ_STATE_REQ_TIMED_OUT, &ctx_info->curr_state)) {
err = -ETIMEDOUT;
pr_notice("%s: %s err req = %p, err = %d, err tag = %d, CMDQ_STATE_REQ_TIMED_OUT\n",
mmc_hostname(host),
__func__, mrq->req, err, mrq->req->tag);
} else if (mrq->data && mrq->data->error) {
err = mrq->data->error;
pr_notice("%s: %s err req = %p, err = %d, err tag = %d, data error\n",
mmc_hostname(host),
__func__, mrq->req, err, mrq->req->tag);
} else if (mrq->cmd && mrq->cmd->error) {
/* DCMD commands */
err = mrq->cmd->error;
pr_notice("%s: %s err req = %p, err = %d, err tag = %d, command error\n",
mmc_hostname(host),
__func__, mrq->req, err, mrq->req->tag);
}
reset:
mmc_blk_cmdq_reset_all(host, err);
if (mrq->cmdq_req->resp_err)
mrq->cmdq_req->resp_err = false;
if (mrq->cmdq_req->skip_dump)
mrq->cmdq_req->skip_dump = false;
if (mrq->cmdq_req->skip_reset)
mrq->cmdq_req->skip_reset = false;
mmc_cmdq_halt(host, false);
host->err_mrq = NULL;
clear_bit(CMDQ_STATE_REQ_TIMED_OUT, &ctx_info->curr_state);
WARN_ON(!test_and_clear_bit(CMDQ_STATE_ERR, &ctx_info->curr_state));
up_write(&ctx_info->err_rwsem);
wake_up(&ctx_info->wait);
}
/* invoked by block layer in softirq context */
void mmc_blk_cmdq_complete_rq(struct request *rq)
{
struct mmc_queue_req *mq_rq = rq->special;
struct mmc_request *mrq = &mq_rq->cmdq_req.mrq;
struct mmc_host *host = mrq->host;
struct mmc_cmdq_context_info *ctx_info = &host->cmdq_ctx;
struct mmc_cmdq_req *cmdq_req = &mq_rq->cmdq_req;
struct mmc_queue *mq = (struct mmc_queue *)rq->q->queuedata;
int err = 0;
int err_resp = 0;
bool is_dcmd = false;
bool err_rwsem = false;
#ifdef CONFIG_MTK_MMC_DEBUG
int cpu = -1;
#endif
if (down_read_trylock(&ctx_info->err_rwsem)) {
err_rwsem = true;
} else {
pr_notice("%s: err_rwsem lock failed to acquire => err handler active\n",
__func__);
WARN_ON_ONCE(!test_bit(CMDQ_STATE_ERR, &ctx_info->curr_state));
goto out;
}
if (mrq->cmd && mrq->cmd->error)
err = mrq->cmd->error;
else if (mrq->data && mrq->data->error)
err = mrq->data->error;
if (cmdq_req->resp_err)
err_resp = cmdq_req->resp_err;
#ifdef MMC_CQHCI_DEBUG
pr_debug("%s: %s completed req = 0x%p, err = %d, tag = %d\n",
mmc_hostname(host), __func__, mrq->req, err, cmdq_req->tag);
#endif
#ifdef CONFIG_MTK_MMC_DEBUG
/* softirq dump */
cpu = smp_processor_id();
dbg_add_sirq_log(host, MAGIC_CQHCI_DBG_TYPE_SIRQ,
err,
cmdq_req->tag,
cpu,
ctx_info->data_active_reqs);
#endif
if ((err || err_resp) && !cmdq_req->skip_err_handling) {
pr_notice("%s: %s: txfr error(%d)/resp_err(%d)\n",
mmc_hostname(mrq->host), __func__, err,
err_resp);
if (test_bit(CMDQ_STATE_ERR, &ctx_info->curr_state)) {
pr_notice("%s: CQ in error state, ending current req: %d\n",
__func__, err);
} else {
set_bit(CMDQ_STATE_ERR, &ctx_info->curr_state);
WARN_ON(host->err_mrq != NULL); /*bug*/
host->err_mrq = mrq;
pr_notice("%s: %s err req = 0x%p, err = %d, err tag = %d\n",
mmc_hostname(host),
__func__, mrq->req, err, rq->tag);
schedule_work(&mq->cmdq_err_work);
}
goto out;
}
/* clear pending request */
if (!test_and_clear_bit(cmdq_req->tag,
&ctx_info->active_reqs)) {
pr_notice("%s: %s req = 0x%p, tag = %d active_reqs already cleared!\n",
mmc_hostname(host), __func__, mrq->req, cmdq_req->tag);
WARN_ON(1); /*bug*/
}
if (cmdq_req->cmdq_req_flags & DCMD)
is_dcmd = true;
else
WARN_ON(!test_and_clear_bit(cmdq_req->tag,
&ctx_info->data_active_reqs)); /*bug*/
if (!is_dcmd)
mmc_cmdq_post_req(host, cmdq_req->tag, err);
if (cmdq_req->cmdq_req_flags & DCMD) {
clear_bit(CMDQ_STATE_DCMD_ACTIVE, &ctx_info->curr_state);
blk_end_request_all(rq, err);
goto out;
}
/*
* In case of error, cmdq_req->data.bytes_xfered is set to 0.
* If we call blk_end_request() with nr_bytes as 0 then the request
* never gets completed. So in case of error, to complete a request
* with error we should use blk_end_request_all().
*/
if (err && cmdq_req->skip_err_handling) {
cmdq_req->skip_err_handling = false;
blk_end_request_all(rq, err);
goto out;
}
mt_biolog_cqhci_complete(cmdq_req->tag);
blk_end_request(rq, err, cmdq_req->data.bytes_xfered);
out:
/*
* Instead of checking host CMDQ_STATE_ERR state,
* use local variable here to prevent some race condition.
* ex. The previous request complete with no error but
* CMDQ_STATE_ERR had just been set in an instant.
*/
if (err_rwsem && !(err || err_resp)) {
wake_up(&ctx_info->wait);
mmc_put_card(host->card);
}
if (!ctx_info->active_reqs)
wake_up_interruptible(&host->cmdq_ctx.queue_empty_wq);
if (blk_queue_stopped(mq->queue) && !ctx_info->active_reqs)
complete(&mq->cmdq_shutdown_complete);
if (err_rwsem)
up_read(&ctx_info->err_rwsem);
}
/*
* Complete reqs from block layer softirq context
* Invoked in irq context
*/
void mmc_blk_cmdq_req_done(struct mmc_request *mrq)
{
struct request *req = mrq->req;
blk_complete_request(req);
}
EXPORT_SYMBOL(mmc_blk_cmdq_req_done);
#endif
static void mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *new_req)
{
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
struct mmc_blk_request *brq;
int disable_multi = 0, retry = 0, type, retune_retry_done = 0;
enum mmc_blk_status status;
struct mmc_queue_req *mqrq_cur = NULL;
struct mmc_queue_req *mq_rq;
struct request *old_req;
struct mmc_async_req *new_areq;
struct mmc_async_req *old_areq;
bool req_pending = true;
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
if (mmc_card_cmdq(card) && !new_req) {
mmc_wait_cmdq_empty(card->host);
return;
}
#endif
if (new_req) {
mqrq_cur = req_to_mmc_queue_req(new_req);
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
if (mmc_card_cmdq(card))
mqrq_cur->sg =
mq->mqrq[atomic_read(&mqrq_cur->index) - 1].sg;
#endif
atomic_inc(&mq->qcnt);
}
if (!atomic_read(&mq->qcnt))
return;
mt_biolog_mmcqd_req_check();
do {
if (new_req) {
/*
* When 4KB native sector is enabled, only 8 blocks
* multiple read or write is allowed
*/
if (mmc_large_sector(card) &&
!IS_ALIGNED(blk_rq_sectors(new_req), 8)) {
pr_notice("%s: Transfer size is not 4KB sector size aligned\n",
new_req->rq_disk->disk_name);
mmc_blk_rw_cmd_abort(mq, card,
new_req, mqrq_cur);
return;
}
mmc_blk_rw_rq_prep(mqrq_cur, card, 0, mq);
new_areq = &mqrq_cur->areq;
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
if (mmc_card_cmdq(card)) {
card->host->areq_que[
atomic_read(&mqrq_cur->index) - 1] =
new_areq;
}
#endif
} else
new_areq = NULL;
old_areq = mmc_start_areq(card->host, new_areq, &status);
if (!old_areq) {
/*
* We have just put the first request into the pipeline
* and there is nothing more to do until it is
* complete.
*/
return;
}
/*
* An asynchronous request has been completed and we proceed
* to handle the result of it.
*/
mq_rq = container_of(old_areq, struct mmc_queue_req, areq);
brq = &mq_rq->brq;
old_req = mmc_queue_req_to_req(mq_rq);
type = rq_data_dir(old_req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
switch (status) {
case MMC_BLK_SUCCESS:
case MMC_BLK_PARTIAL:
/*
* A block was successfully transferred.
*/
mmc_blk_reset_success(md, type);
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
if (status == MMC_BLK_SUCCESS) {
req_pending = 0;
spin_lock_irq(&md->lock);
blk_complete_request(old_req);
spin_unlock_irq(&md->lock);
} else
#endif
{
req_pending = blk_end_request(old_req,
BLK_STS_OK,
brq->data.bytes_xfered);
}
/*
* If the blk_end_request function returns non-zero even
* though all data has been transferred and no errors
* were returned by the host controller, it's a bug.
*/
if (status == MMC_BLK_SUCCESS && req_pending) {
pr_err("%s BUG rq_tot %d d_xfer %d\n",
__func__, blk_rq_bytes(old_req),
brq->data.bytes_xfered);
mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq);
return;
}
break;
case MMC_BLK_CMD_ERR:
req_pending = mmc_blk_rw_cmd_err(md, card, brq, old_req, req_pending);
if (mmc_blk_reset(md, card->host, type)) {
if (req_pending)
mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq);
else
atomic_dec(&mq->qcnt);
mmc_blk_rw_try_restart(mq, new_req, mqrq_cur);
return;
}
if (!req_pending) {
atomic_dec(&mq->qcnt);
mmc_blk_rw_try_restart(mq, new_req, mqrq_cur);
return;
}
break;
case MMC_BLK_RETRY:
retune_retry_done = brq->retune_retry_done;
if (retry++ < 5)
break;
/* Fall through */
case MMC_BLK_ABORT:
if (!mmc_blk_reset(md, card->host, type))
break;
mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq);
mmc_blk_rw_try_restart(mq, new_req, mqrq_cur);
return;
case MMC_BLK_DATA_ERR: {
int err;
err = mmc_blk_reset(md, card->host, type);
if (!err)
break;
if (err == -ENODEV) {
mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq);
mmc_blk_rw_try_restart(mq, new_req, mqrq_cur);
return;
}
/* Fall through */
}
case MMC_BLK_ECC_ERR:
if (brq->data.blocks > 1) {
/* Redo read one sector at a time */
pr_warn("%s: retrying using single block read\n",
old_req->rq_disk->disk_name);
disable_multi = 1;
break;
}
/*
* After an error, we redo I/O one sector at a
* time, so we only reach here after trying to
* read a single sector.
*/
req_pending = blk_end_request(old_req, BLK_STS_IOERR,
brq->data.blksz);
if (!req_pending) {
atomic_dec(&mq->qcnt);
mmc_blk_rw_try_restart(mq, new_req, mqrq_cur);
return;
}
break;
case MMC_BLK_NOMEDIUM:
mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq);
mmc_blk_rw_try_restart(mq, new_req, mqrq_cur);
return;
default:
pr_err("%s: Unhandled return value (%d)",
old_req->rq_disk->disk_name, status);
mmc_blk_rw_cmd_abort(mq, card, old_req, mq_rq);
mmc_blk_rw_try_restart(mq, new_req, mqrq_cur);
return;
}
if (req_pending) {
/*
* In case of a incomplete request
* prepare it again and resend.
*/
mmc_blk_rw_rq_prep(mq_rq, card,
disable_multi, mq);
mmc_start_areq(card->host,
&mq_rq->areq, NULL);
mq_rq->brq.retune_retry_done = retune_retry_done;
}
} while (req_pending);
atomic_dec(&mq->qcnt);
}
/* check if the partition support cmdq or not */
bool mmc_blk_part_cmdq_en(struct mmc_queue *mq)
{
#if defined(CONFIG_MTK_EMMC_CQ_SUPPORT) || defined(CONFIG_MTK_EMMC_HW_CQ)
int ret = false;
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card;
if (!md)
return false;
card = md->queue.card;
/* enable cmdq at support partition */
if (card->ext_csd.cmdq_support
&& md->part_type <= PART_CMDQ_EN)
ret = true;
return ret;
#else
/* return false for cmdq off */
return false;
#endif
}
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
int mmc_blk_end_queued_req(struct mmc_host *host,
struct mmc_async_req *areq_active, int index, int status)
{
struct mmc_queue *mq;
struct mmc_blk_data *md;
struct mmc_card *card = host->card;
struct mmc_blk_request *brq;
int ret = 1, type, areq_cnt;
struct mmc_queue_req *mq_rq;
struct request *req;
unsigned long flags;
mq_rq = container_of(areq_active, struct mmc_queue_req, areq);
brq = &mq_rq->brq;
req = mmc_queue_req_to_req(mq_rq);
mq = req->q->queuedata;
md = mq->blkdata;
type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
switch (status) {
case MMC_BLK_SUCCESS:
case MMC_BLK_PARTIAL:
/*
* A block was successfully transferred.
*/
mmc_blk_reset_success(md, type);
ret = blk_end_request(req, 0,
brq->data.bytes_xfered);
mq->mqrq[index].req = NULL;
host->areq_que[index] = NULL;
/*
* If the blk_end_request function returns non-zero even
* though all data has been transferred and no errors
* were returned by the host controller, it's a bug.
*/
if (status == MMC_BLK_SUCCESS && ret) {
pr_err("%s BUG rq_tot %d d_xfer %d\n",
__func__, blk_rq_bytes(req),
brq->data.bytes_xfered);
goto cmd_abort;
}
mmc_put_card(card);
atomic_set(&mq->mqrq[index].index, 0);
atomic_dec(&mq->qcnt);
atomic_dec(&host->areq_cnt);
break;
case MMC_BLK_CMD_ERR:
ret = mmc_blk_rw_cmd_err(md, card, brq, req, !!ret);
mmc_blk_reset(md, card->host, type);
goto cmd_abort;
case MMC_BLK_RETRY:
case MMC_BLK_ABORT:
mmc_blk_reset(md, card->host, type);
goto cmd_abort;
case MMC_BLK_DATA_ERR: {
int err;
err = mmc_blk_reset(md, card->host, type);
if (err == -ENODEV)
goto cmd_abort;
/* Fall through */
}
case MMC_BLK_ECC_ERR:
/*
* After an error, we redo I/O one sector at a
* time, so we only reach here after trying to
* read a single sector.
*/
spin_lock_irqsave(&md->lock, flags);
ret = __blk_end_request(req, -EIO, brq->data.blksz);
spin_unlock_irqrestore(&md->lock, flags);
mq->mqrq[index].req = NULL;
host->areq_que[index] = NULL;
mmc_put_card(card);
atomic_set(&mq->mqrq[index].index, 0);
atomic_dec(&mq->qcnt);
atomic_dec(&host->areq_cnt);
if (!ret)
goto start_new_req;
break;
case MMC_BLK_NOMEDIUM:
goto cmd_abort;
default:
pr_err("%s: Unhandled return value (%d)",
req->rq_disk->disk_name, status);
goto cmd_abort;
}
/*
* one request is removed from queue,
* we wakeup mmcqd to insert new request to queue
* wakeup only when queue full or queue empty
*/
areq_cnt = atomic_read(&host->areq_cnt);
if (areq_cnt >= host->card->ext_csd.cmdq_depth -
EMMC_MIN_RT_CLASS_TAG_COUNT - 1)
wake_up_process(mq->thread);
else if (areq_cnt == 0)
wake_up_interruptible(&host->cmp_que);
return 1;
cmd_abort:
spin_lock_irq(&md->lock);
if (mmc_card_removed(card))
req->cmd_flags |= RQF_QUIET;
while (ret)
ret = __blk_end_request(req, -EIO,
blk_rq_cur_bytes(req));
spin_unlock_irq(&md->lock);
mq->mqrq[index].req = NULL;
host->areq_que[index] = NULL;
/* Add for coverity check, it shouldn't be NULL */
if (card)
mmc_put_card(card);
atomic_set(&mq->mqrq[index].index, 0);
atomic_dec(&mq->qcnt);
atomic_dec(&host->areq_cnt);
start_new_req:
/*
* one request is removed from queue,
* we wakeup mmcqd to insert new request to queue
* wakeup only when queue full or queue empty
*/
areq_cnt = atomic_read(&host->areq_cnt);
if (areq_cnt >= host->card->ext_csd.cmdq_depth -
EMMC_MIN_RT_CLASS_TAG_COUNT - 1)
wake_up_process(mq->thread);
else if (areq_cnt == 0)
wake_up_interruptible(&host->cmp_que);
return 0;
}
static int mmc_get_cmdq_index(struct mmc_queue *mq)
{
int i;
/* cmdq should be enabled when calling this function */
WARN_ON(!mmc_card_cmdq(mq->card));
for (i = 0; i < mq->card->ext_csd.cmdq_depth; i++) {
if (!atomic_read(&mq->mqrq[i].index))
break;
}
return i;
}
#endif
#ifdef CONFIG_MTK_EMMC_HW_CQ
static inline int mmc_blk_cmdq_part_switch(struct mmc_card *card,
struct mmc_blk_data *md)
{
struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
struct mmc_host *host = card->host;
struct mmc_cmdq_context_info *ctx = &host->cmdq_ctx;
u8 part_config = card->ext_csd.part_config;
if ((main_md->part_curr == md->part_type) &&
(card->part_curr == md->part_type))
return 0;
WARN_ON(!((card->host->caps2 & MMC_CAP2_CQE) &&
card->ext_csd.cmdq_support &&
(md->flags & MMC_BLK_CMD_QUEUE)));
if (!test_bit(CMDQ_STATE_HALT, &ctx->curr_state))
WARN_ON(mmc_cmdq_halt(host, true));
/* disable CQ mode in card */
if (mmc_card_cmdq(card)) {
WARN_ON(mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_CMDQ_MODE_EN, 0,
card->ext_csd.generic_cmd6_time));
mmc_card_clr_cmdq(card);
}
part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
part_config |= md->part_type;
WARN_ON(mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_PART_CONFIG, part_config,
card->ext_csd.part_time));
card->ext_csd.part_config = part_config;
card->part_curr = md->part_type;
main_md->part_curr = md->part_type;
WARN_ON(mmc_cmdq_enable(card));
/* no need to halt again */
/*WARN_ON(mmc_cmdq_halt(host, false));*/
return 0;
}
static int mmc_blk_cmdq_issue_rq(struct mmc_queue *mq, struct request *req)
{
int ret;
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
mmc_get_card(card);
if (!card->host->cmdq_ctx.active_reqs && mmc_card_doing_bkops(card)) {
ret = mmc_cmdq_halt(card->host, true);
if (ret)
goto out;
ret = mmc_stop_bkops(card);
if (ret) {
pr_notice("%s: %s: mmc_stop_bkops failed %d\n",
md->disk->disk_name, __func__, ret);
goto out;
}
ret = mmc_cmdq_halt(card->host, false);
if (ret)
goto out;
}
ret = mmc_blk_cmdq_part_switch(card, md);
if (ret) {
pr_notice("%s: %s: partition switch failed %d\n",
md->disk->disk_name, __func__, ret);
goto out;
}
if (req) {
struct mmc_host *host = card->host;
struct mmc_cmdq_context_info *ctx = &host->cmdq_ctx;
if (mmc_req_is_special(req) &&
(card->quirks & MMC_QUIRK_CMDQ_EMPTY_BEFORE_DCMD) &&
ctx->active_small_sector_read_reqs) {
mmc_cmdq_up_rwsem(host);
ret = wait_event_interruptible(ctx->queue_empty_wq,
!ctx->active_reqs);
if (ret) {
pr_notice("%s: failed while waiting for the CMDQ to be empty %s err (%d)\n",
mmc_hostname(host),
__func__, ret);
WARN_ON(1); /*bug*/
}
/* clear the counter now */
ctx->active_small_sector_read_reqs = 0;
ret = mmc_cmdq_down_rwsem(host, req);
/*
* If there were small sector (less than 8 sectors) read
* operations in progress then we have to wait for the
* outstanding requests to finish and should also have
* atleast 6 microseconds delay before queuing the DCMD
* request.
*/
udelay(MMC_QUIRK_CMDQ_DELAY_BEFORE_DCMD);
}
if ((req_op(req) == REQ_OP_DRV_IN)
|| (req_op(req) == REQ_OP_DRV_OUT)) {
mmc_blk_issue_drv_op(mq, req);
mmc_put_card(card);
} else if (req_op(req) == REQ_OP_DISCARD) {
ret = mmc_blk_cmdq_issue_discard_rq(mq, req);
} else if (req_op(req) == REQ_OP_SECURE_ERASE) {
if (!(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
ret = mmc_blk_cmdq_issue_secdiscard_rq(mq, req);
else
ret = mmc_blk_cmdq_issue_discard_rq(mq, req);
} else if (req_op(req) == REQ_OP_FLUSH) {
ret = mmc_blk_cmdq_issue_flush_rq(mq, req);
} else {
ret = mmc_blk_cmdq_issue_rw_rq(mq, req);
}
}
return ret;
out:
if (req)
blk_end_request_all(req, BLK_STS_IOERR);
mmc_put_card(card);
return ret;
}
#endif
void mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
{
int ret;
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
bool part_cmdq_en = mmc_blk_part_cmdq_en(mq);
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
bool put_card = false;
#endif
if (part_cmdq_en || (req && !atomic_read(&mq->qcnt)))
/* non-cq: claim host only for the first request
* cq: claim host for per request
*/
mmc_get_card(card);
ret = mmc_blk_part_switch(card, md->part_type);
if (ret) {
if (req) {
blk_end_request_all(req, BLK_STS_IOERR);
}
ret = 0;
if (part_cmdq_en) {
mmc_put_card(card);
return;
}
goto out;
}
if (req) {
switch (req_op(req)) {
case REQ_OP_DRV_IN:
case REQ_OP_DRV_OUT:
/*
* Complete ongoing async transfer before issuing
* ioctl()s
*/
if (atomic_read(&mq->qcnt))
mmc_blk_issue_rw_rq(mq, NULL);
mmc_blk_issue_drv_op(mq, req);
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
put_card = true;
#endif
break;
case REQ_OP_DISCARD:
/*
* Complete ongoing async transfer before issuing
* discard.
*/
if (atomic_read(&mq->qcnt))
mmc_blk_issue_rw_rq(mq, NULL);
mmc_blk_issue_discard_rq(mq, req);
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
put_card = true;
#endif
break;
case REQ_OP_SECURE_ERASE:
/*
* Complete ongoing async transfer before issuing
* secure erase.
*/
if (atomic_read(&mq->qcnt))
mmc_blk_issue_rw_rq(mq, NULL);
mmc_blk_issue_secdiscard_rq(mq, req);
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
put_card = true;
#endif
break;
case REQ_OP_FLUSH:
/*
* Complete ongoing async transfer before issuing
* flush.
*/
if (atomic_read(&mq->qcnt))
mmc_blk_issue_rw_rq(mq, NULL);
mmc_blk_issue_flush(mq, req);
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
put_card = true;
#endif
break;
default:
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
if (part_cmdq_en) {
int index = 0;
index = mmc_get_cmdq_index(mq);
WARN_ON(index >= card->ext_csd.cmdq_depth);
mq->mqrq[index].req = req;
atomic_set(&req_to_mmc_queue_req(req)->index,
index + 1);
atomic_set(&mq->mqrq[index].index,
index + 1);
atomic_inc(&card->host->areq_cnt);
}
#endif
/* Normal request, just issue it */
mmc_blk_issue_rw_rq(mq, req);
card->host->context_info.is_waiting_last_req = false;
break;
}
} else {
/* No request, flushing the pipeline with NULL */
mmc_blk_issue_rw_rq(mq, NULL);
card->host->context_info.is_waiting_last_req = false;
}
out:
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
/*
* Since CQ has its own thread to handle mmc_put_card().
* We don't call mmc_put_card() for read/write requests.
*
* But for request REQ_OP_DRV_IN REQ_OP_DRV_OUT
* REQ_OP_DISCARD REQ_OP_SECURE_ERASE REQ_OP_FLUSH
* which is other than read/write request needs to
* call mmc_put_card() here.
*/
if (part_cmdq_en) {
if (put_card)
mmc_put_card(card);
} else
#endif
if (!atomic_read(&mq->qcnt))
mmc_put_card(card);
}
static inline int mmc_blk_readonly(struct mmc_card *card)
{
return mmc_card_readonly(card) ||
!(card->csd.cmdclass & CCC_BLOCK_WRITE);
}
static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
struct device *parent,
sector_t size,
bool default_ro,
const char *subname,
int area_type)
{
struct mmc_blk_data *md;
int devidx, ret;
devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL);
if (devidx < 0) {
/*
* We get -ENOSPC because there are no more any available
* devidx. The reason may be that, either userspace haven't yet
* unmounted the partitions, which postpones mmc_blk_release()
* from being called, or the device has more partitions than
* what we support.
*/
if (devidx == -ENOSPC)
dev_err(mmc_dev(card->host),
"no more device IDs available\n");
return ERR_PTR(devidx);
}
md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
if (!md) {
ret = -ENOMEM;
goto out;
}
md->area_type = area_type;
/*
* Set the read-only status based on the supported commands
* and the write protect switch.
*/
md->read_only = mmc_blk_readonly(card);
md->disk = alloc_disk(perdev_minors);
if (md->disk == NULL) {
ret = -ENOMEM;
goto err_kfree;
}
spin_lock_init(&md->lock);
INIT_LIST_HEAD(&md->part);
INIT_LIST_HEAD(&md->rpmbs);
md->usage = 1;
#ifdef CONFIG_MTK_EMMC_CQ_SUPPORT
/* inline crypto */
ret = mmc_init_crypto(card->host);
if (ret) {
dev_err(mmc_dev(card->host),
"mmc-crypto init fail!!\n");
return ERR_PTR(ret);
}
#endif
ret = mmc_init_queue(&md->queue, card, &md->lock, subname, area_type);
if (ret)
goto err_putdisk;
md->queue.blkdata = md;
md->disk->major = MMC_BLOCK_MAJOR;
md->disk->first_minor = devidx * perdev_minors;
md->disk->fops = &mmc_bdops;
md->disk->private_data = md;
md->disk->queue = md->queue.queue;
md->parent = parent;
set_disk_ro(md->disk, md->read_only || default_ro);
md->disk->flags = GENHD_FL_EXT_DEVT;
if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
md->disk->flags |= GENHD_FL_NO_PART_SCAN;
/*
* As discussed on lkml, GENHD_FL_REMOVABLE should:
*
* - be set for removable media with permanent block devices
* - be unset for removable block devices with permanent media
*
* Since MMC block devices clearly fall under the second
* case, we do not set GENHD_FL_REMOVABLE. Userspace
* should use the block device creation/destruction hotplug
* messages to tell when the card is present.
*/
snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
"mmcblk%u%s", card->host->index, subname ? subname : "");
if (mmc_card_mmc(card))
blk_queue_logical_block_size(md->queue.queue,
card->ext_csd.data_sector_size);
else
blk_queue_logical_block_size(md->queue.queue, 512);
set_capacity(md->disk, size);
if (mmc_host_cmd23(card->host)) {
if ((mmc_card_mmc(card) &&
card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
(mmc_card_sd(card) &&
card->scr.cmds & SD_SCR_CMD23_SUPPORT))
md->flags |= MMC_BLK_CMD23;
}
if (mmc_card_mmc(card) &&
md->flags & MMC_BLK_CMD23 &&
((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
card->ext_csd.rel_sectors)) {
md->flags |= MMC_BLK_REL_WR;
blk_queue_write_cache(md->queue.queue, true, true);
}
#ifdef CONFIG_MTK_EMMC_HW_CQ
if (card->cqe_init) {
md->flags |= MMC_BLK_CMD_QUEUE;
md->queue.cmdq_complete_fn = mmc_blk_cmdq_complete_rq;
md->queue.cmdq_issue_fn = mmc_blk_cmdq_issue_rq;
md->queue.cmdq_error_fn = mmc_blk_cmdq_err;
md->queue.cmdq_req_timed_out = mmc_blk_cmdq_req_timed_out;
md->queue.cmdq_shutdown = mmc_blk_cmdq_shutdown;
}
#endif
return md;
err_putdisk:
put_disk(md->disk);
err_kfree:
kfree(md);
out:
ida_simple_remove(&mmc_blk_ida, devidx);
return ERR_PTR(ret);
}
static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
{
sector_t size;
if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
/*
* The EXT_CSD sector count is in number or 512 byte
* sectors.
*/
size = card->ext_csd.sectors;
} else {
/*
* The CSD capacity field is in units of read_blkbits.
* set_capacity takes units of 512 bytes.
*/
size = (typeof(sector_t))card->csd.capacity
<< (card->csd.read_blkbits - 9);
}
return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
MMC_BLK_DATA_AREA_MAIN);
}
static int mmc_blk_alloc_part(struct mmc_card *card,
struct mmc_blk_data *md,
unsigned int part_type,
sector_t size,
bool default_ro,
const char *subname,
int area_type)
{
char cap_str[10];
struct mmc_blk_data *part_md;
part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
subname, area_type);
if (IS_ERR(part_md))
return PTR_ERR(part_md);
part_md->part_type = part_type;
list_add(&part_md->part, &md->part);
string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
cap_str, sizeof(cap_str));
pr_info("%s: %s %s partition %u %s\n",
part_md->disk->disk_name, mmc_card_id(card),
mmc_card_name(card), part_md->part_type, cap_str);
return 0;
}
/**
* mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev
* @filp: the character device file
* @cmd: the ioctl() command
* @arg: the argument from userspace
*
* This will essentially just redirect the ioctl()s coming in over to
* the main block device spawning the RPMB character device.
*/
static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct mmc_rpmb_data *rpmb = filp->private_data;
int ret;
switch (cmd) {
case MMC_IOC_CMD:
ret = mmc_blk_ioctl_cmd(rpmb->md,
(struct mmc_ioc_cmd __user *)arg,
rpmb);
break;
case MMC_IOC_MULTI_CMD:
ret = mmc_blk_ioctl_multi_cmd(rpmb->md,
(struct mmc_ioc_multi_cmd __user *)arg,
rpmb);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
#ifdef CONFIG_COMPAT
static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd,
unsigned long arg)
{
return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
}
#endif
static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp)
{
struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
struct mmc_rpmb_data, chrdev);
get_device(&rpmb->dev);
filp->private_data = rpmb;
mmc_blk_get(rpmb->md->disk);
return nonseekable_open(inode, filp);
}
static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp)
{
struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
struct mmc_rpmb_data, chrdev);
mmc_blk_put(rpmb->md);
put_device(&rpmb->dev);
return 0;
}
static const struct file_operations mmc_rpmb_fileops = {
.release = mmc_rpmb_chrdev_release,
.open = mmc_rpmb_chrdev_open,
.owner = THIS_MODULE,
.llseek = no_llseek,
.unlocked_ioctl = mmc_rpmb_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = mmc_rpmb_ioctl_compat,
#endif
};
static void mmc_blk_rpmb_device_release(struct device *dev)
{
struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev);
ida_simple_remove(&mmc_rpmb_ida, rpmb->id);
kfree(rpmb);
}
static int mmc_blk_alloc_rpmb_part(struct mmc_card *card,
struct mmc_blk_data *md,
unsigned int part_index,
sector_t size,
const char *subname)
{
int devidx, ret;
char rpmb_name[DISK_NAME_LEN];
char cap_str[10];
struct mmc_rpmb_data *rpmb;
/* This creates the minor number for the RPMB char device */
devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL);
if (devidx < 0)
return devidx;
rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL);
if (!rpmb) {
ida_simple_remove(&mmc_rpmb_ida, devidx);
return -ENOMEM;
}
snprintf(rpmb_name, sizeof(rpmb_name),
"mmcblk%u%s", card->host->index, subname ? subname : "");
rpmb->id = devidx;
rpmb->part_index = part_index;
rpmb->dev.init_name = rpmb_name;
rpmb->dev.bus = &mmc_rpmb_bus_type;
rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id);
rpmb->dev.parent = &card->dev;
rpmb->dev.release = mmc_blk_rpmb_device_release;
device_initialize(&rpmb->dev);
dev_set_drvdata(&rpmb->dev, rpmb);
rpmb->md = md;
cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops);
rpmb->chrdev.owner = THIS_MODULE;
ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev);
if (ret) {
pr_err("%s: could not add character device\n", rpmb_name);
goto out_put_device;
}
list_add(&rpmb->node, &md->rpmbs);
string_get_size((u64)size, 512, STRING_UNITS_2,
cap_str, sizeof(cap_str));
pr_info("%s: %s %s partition %u %s, chardev (%d:%d)\n",
rpmb_name, mmc_card_id(card),
mmc_card_name(card), EXT_CSD_PART_CONFIG_ACC_RPMB, cap_str,
MAJOR(mmc_rpmb_devt), rpmb->id);
return 0;
out_put_device:
put_device(&rpmb->dev);
return ret;
}
static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb)
{
cdev_device_del(&rpmb->chrdev, &rpmb->dev);
put_device(&rpmb->dev);
}
/* MMC Physical partitions consist of two boot partitions and
* up to four general purpose partitions.
* For each partition enabled in EXT_CSD a block device will be allocatedi
* to provide access to the partition.
*/
static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
{
int idx, ret;
if (!mmc_card_mmc(card))
return 0;
for (idx = 0; idx < card->nr_parts; idx++) {
if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) {
/*
* RPMB partitions does not provide block access, they
* are only accessed using ioctl():s. Thus create
* special RPMB block devices that do not have a
* backing block queue for these.
*/
ret = mmc_blk_alloc_rpmb_part(card, md,
card->part[idx].part_cfg,
card->part[idx].size >> 9,
card->part[idx].name);
if (ret)
return ret;
}
if (card->part[idx].size) {
ret = mmc_blk_alloc_part(card, md,
card->part[idx].part_cfg,
card->part[idx].size >> 9,
card->part[idx].force_ro,
card->part[idx].name,
card->part[idx].area_type);
if (ret)
return ret;
}
}
return 0;
}
static void mmc_blk_remove_req(struct mmc_blk_data *md)
{
struct mmc_card *card;
if (md) {
/*
* Flush remaining requests and free queues. It
* is freeing the queue that stops new requests
* from being accepted.
*/
card = md->queue.card;
spin_lock_irq(md->queue.queue->queue_lock);
queue_flag_set(QUEUE_FLAG_BYPASS, md->queue.queue);
spin_unlock_irq(md->queue.queue->queue_lock);
blk_set_queue_dying(md->queue.queue);
mmc_cleanup_queue(&md->queue);
#ifdef CONFIG_MTK_EMMC_HW_CQ
if (md->flags & MMC_BLK_CMD_QUEUE)
mmc_cmdq_clean(&md->queue, card);
#endif
if (md->disk->flags & GENHD_FL_UP) {
device_remove_file(disk_to_dev(md->disk), &md->force_ro);
if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
card->ext_csd.boot_ro_lockable)
device_remove_file(disk_to_dev(md->disk),
&md->power_ro_lock);
del_gendisk(md->disk);
}
mmc_blk_put(md);
}
}
static void mmc_blk_remove_parts(struct mmc_card *card,
struct mmc_blk_data *md)
{
struct list_head *pos, *q;
struct mmc_blk_data *part_md;
struct mmc_rpmb_data *rpmb;
/* Remove RPMB partitions */
list_for_each_safe(pos, q, &md->rpmbs) {
rpmb = list_entry(pos, struct mmc_rpmb_data, node);
list_del(pos);
mmc_blk_remove_rpmb_part(rpmb);
}
/* Remove block partitions */
list_for_each_safe(pos, q, &md->part) {
part_md = list_entry(pos, struct mmc_blk_data, part);
list_del(pos);
mmc_blk_remove_req(part_md);
}
}
static int mmc_add_disk(struct mmc_blk_data *md)
{
int ret;
struct mmc_card *card = md->queue.card;
device_add_disk(md->parent, md->disk);
md->force_ro.show = force_ro_show;
md->force_ro.store = force_ro_store;
sysfs_attr_init(&md->force_ro.attr);
md->force_ro.attr.name = "force_ro";
md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
if (ret)
goto force_ro_fail;
if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
card->ext_csd.boot_ro_lockable) {
umode_t mode;
if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
mode = S_IRUGO;
else
mode = S_IRUGO | S_IWUSR;
md->power_ro_lock.show = power_ro_lock_show;
md->power_ro_lock.store = power_ro_lock_store;
sysfs_attr_init(&md->power_ro_lock.attr);
md->power_ro_lock.attr.mode = mode;
md->power_ro_lock.attr.name =
"ro_lock_until_next_power_on";
ret = device_create_file(disk_to_dev(md->disk),
&md->power_ro_lock);
if (ret)
goto power_ro_lock_fail;
}
return ret;
power_ro_lock_fail:
device_remove_file(disk_to_dev(md->disk), &md->force_ro);
force_ro_fail:
del_gendisk(md->disk);
return ret;
}
#ifdef CONFIG_DEBUG_FS
static int mmc_dbg_card_status_get(void *data, u64 *val)
{
struct mmc_card *card = data;
struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
struct mmc_queue *mq = &md->queue;
struct request *req;
int ret;
/* Ask the block layer about the card status */
req = blk_get_request(mq->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
if (IS_ERR(req))
return PTR_ERR(req);
req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS;
req_to_mmc_queue_req(req)->drv_op_result = -EIO;
blk_execute_rq(mq->queue, NULL, req, 0);
ret = req_to_mmc_queue_req(req)->drv_op_result;
if (ret >= 0) {
*val = ret;
ret = 0;
}
blk_put_request(req);
return ret;
}
DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
NULL, "%08llx\n");
/* That is two digits * 512 + 1 for newline */
#define EXT_CSD_STR_LEN 1025
static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
{
struct mmc_card *card = inode->i_private;
struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
struct mmc_queue *mq = &md->queue;
struct request *req;
char *buf;
ssize_t n = 0;
u8 *ext_csd;
int err, i;
buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
if (!buf)
return -ENOMEM;
/* Ask the block layer for the EXT CSD */
req = blk_get_request(mq->queue, REQ_OP_DRV_IN, __GFP_RECLAIM);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto out_free;
}
req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD;
req_to_mmc_queue_req(req)->drv_op_result = -EIO;
req_to_mmc_queue_req(req)->drv_op_data = &ext_csd;
blk_execute_rq(mq->queue, NULL, req, 0);
err = req_to_mmc_queue_req(req)->drv_op_result;
blk_put_request(req);
if (err) {
pr_err("FAILED %d\n", err);
goto out_free;
}
for (i = 0; i < 512; i++)
n += sprintf(buf + n, "%02x", ext_csd[i]);
n += sprintf(buf + n, "\n");
if (n != EXT_CSD_STR_LEN) {
err = -EINVAL;
kfree(ext_csd);
goto out_free;
}
filp->private_data = buf;
kfree(ext_csd);
return 0;
out_free:
kfree(buf);
return err;
}
static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
char *buf = filp->private_data;
return simple_read_from_buffer(ubuf, cnt, ppos,
buf, EXT_CSD_STR_LEN);
}
static int mmc_ext_csd_release(struct inode *inode, struct file *file)
{
kfree(file->private_data);
return 0;
}
static const struct file_operations mmc_dbg_ext_csd_fops = {
.open = mmc_ext_csd_open,
.read = mmc_ext_csd_read,
.release = mmc_ext_csd_release,
.llseek = default_llseek,
};
static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
{
struct dentry *root;
if (!card->debugfs_root)
return 0;
root = card->debugfs_root;
if (mmc_card_mmc(card) || mmc_card_sd(card)) {
md->status_dentry =
debugfs_create_file("status", S_IRUSR, root, card,
&mmc_dbg_card_status_fops);
if (!md->status_dentry)
return -EIO;
}
if (mmc_card_mmc(card)) {
md->ext_csd_dentry =
debugfs_create_file("ext_csd", S_IRUSR, root, card,
&mmc_dbg_ext_csd_fops);
if (!md->ext_csd_dentry)
return -EIO;
}
return 0;
}
static void mmc_blk_remove_debugfs(struct mmc_card *card,
struct mmc_blk_data *md)
{
if (!card->debugfs_root)
return;
if (!IS_ERR_OR_NULL(md->status_dentry)) {
debugfs_remove(md->status_dentry);
md->status_dentry = NULL;
}
if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) {
debugfs_remove(md->ext_csd_dentry);
md->ext_csd_dentry = NULL;
}
}
#else
static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
{
return 0;
}
static void mmc_blk_remove_debugfs(struct mmc_card *card,
struct mmc_blk_data *md)
{
}
#endif /* CONFIG_DEBUG_FS */
static int mmc_blk_probe(struct mmc_card *card)
{
struct mmc_blk_data *md, *part_md;
char cap_str[10];
/*
* Check that the card supports the command class(es) we need.
*/
if (!(card->csd.cmdclass & CCC_BLOCK_READ))
return -ENODEV;
mmc_fixup_device(card, mmc_blk_fixups);
md = mmc_blk_alloc(card);
if (IS_ERR(md))
return PTR_ERR(md);
string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
cap_str, sizeof(cap_str));
pr_info("%s: %s %s %s %s\n",
md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
cap_str, md->read_only ? "(ro)" : "");
if (mmc_blk_alloc_parts(card, md))
goto out;
dev_set_drvdata(&card->dev, md);
if (mmc_add_disk(md))
goto out;
list_for_each_entry(part_md, &md->part, part) {
if (mmc_add_disk(part_md))
goto out;
}
/* Add two debugfs entries */
mmc_blk_add_debugfs(card, md);
pm_runtime_set_autosuspend_delay(&card->dev, 3000);
pm_runtime_use_autosuspend(&card->dev);
/*
* Don't enable runtime PM for SD-combo cards here. Leave that
* decision to be taken during the SDIO init sequence instead.
*/
if (card->type != MMC_TYPE_SD_COMBO) {
pm_runtime_set_active(&card->dev);
pm_runtime_enable(&card->dev);
}
return 0;
out:
mmc_blk_remove_parts(card, md);
mmc_blk_remove_req(md);
return 0;
}
static void mmc_blk_remove(struct mmc_card *card)
{
struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
mmc_blk_remove_debugfs(card, md);
mmc_blk_remove_parts(card, md);
pm_runtime_get_sync(&card->dev);
mmc_claim_host(card->host);
mmc_blk_part_switch(card, md->part_type);
mmc_release_host(card->host);
if (card->type != MMC_TYPE_SD_COMBO)
pm_runtime_disable(&card->dev);
pm_runtime_put_noidle(&card->dev);
mmc_blk_remove_req(md);
dev_set_drvdata(&card->dev, NULL);
}
#ifdef CONFIG_MTK_EMMC_HW_CQ
static int _mmc_blk_suspend(struct mmc_card *card, bool wait)
{
struct mmc_blk_data *part_md;
struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
int rc = 0;
if (md) {
rc = mmc_queue_suspend(&md->queue, wait);
if (rc)
goto out;
list_for_each_entry(part_md, &md->part, part) {
rc = mmc_queue_suspend(&part_md->queue, wait);
if (rc)
goto out_resume;
}
}
goto out;
out_resume:
mmc_queue_resume(&md->queue);
list_for_each_entry(part_md, &md->part, part) {
mmc_queue_resume(&part_md->queue);
}
out:
return rc;
}
#else
static int _mmc_blk_suspend(struct mmc_card *card)
{
struct mmc_blk_data *part_md;
struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
if (md) {
mmc_queue_suspend(&md->queue);
list_for_each_entry(part_md, &md->part, part) {
mmc_queue_suspend(&part_md->queue);
}
}
return 0;
}
#endif
static void mmc_blk_shutdown(struct mmc_card *card)
{
#ifdef CONFIG_MTK_EMMC_HW_CQ
_mmc_blk_suspend(card, 1);
#else
_mmc_blk_suspend(card);
#endif
}
#ifdef CONFIG_PM_SLEEP
static int mmc_blk_suspend(struct device *dev)
{
struct mmc_card *card = mmc_dev_to_card(dev);
struct mmc_blk_data *md = dev_get_drvdata(dev);
int ret;
#ifdef CONFIG_MTK_EMMC_HW_CQ
ret = _mmc_blk_suspend(card, 0);
#else
ret = _mmc_blk_suspend(card);
#endif
if (ret)
goto out;
/*
* Make sure partition is the main one when
* suspend.
*/
if (md) {
mmc_get_card(card);
ret = mmc_blk_part_switch(card, md->part_type);
if (ret)
pr_info("%s: error %d during suspend\n",
md->disk->disk_name, ret);
mmc_put_card(card);
}
out:
return ret;
}
static int mmc_blk_resume(struct device *dev)
{
struct mmc_blk_data *part_md;
struct mmc_blk_data *md = dev_get_drvdata(dev);
if (md) {
/*
* Resume involves the card going into idle state,
* so current partition is always the main one.
*/
md->part_curr = md->part_type;
mmc_queue_resume(&md->queue);
list_for_each_entry(part_md, &md->part, part) {
mmc_queue_resume(&part_md->queue);
}
}
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
static struct mmc_driver mmc_driver = {
.drv = {
.name = "mmcblk",
.pm = &mmc_blk_pm_ops,
},
.probe = mmc_blk_probe,
.remove = mmc_blk_remove,
.shutdown = mmc_blk_shutdown,
};
static int __init mmc_blk_init(void)
{
int res;
res = bus_register(&mmc_rpmb_bus_type);
if (res < 0) {
pr_err("mmcblk: could not register RPMB bus type\n");
return res;
}
res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb");
if (res < 0) {
pr_err("mmcblk: failed to allocate rpmb chrdev region\n");
goto out_bus_unreg;
}
if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
pr_info("mmcblk: using %d minors per device\n", perdev_minors);
max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
if (res)
goto out_chrdev_unreg;
res = mmc_register_driver(&mmc_driver);
if (res)
goto out_blkdev_unreg;
mt_mmc_biolog_init();
return 0;
out_blkdev_unreg:
unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
out_chrdev_unreg:
unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
out_bus_unreg:
bus_unregister(&mmc_rpmb_bus_type);
return res;
}
static void __exit mmc_blk_exit(void)
{
mmc_unregister_driver(&mmc_driver);
unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
bus_unregister(&mmc_rpmb_bus_type);
}
module_init(mmc_blk_init);
module_exit(mmc_blk_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
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