/* call mmc block layer interface for userspace to do erase operate */
static int simple_mmc_erase_func(unsigned int start, unsigned int size)
{
struct msdc_host *host;
/* emmc always in slot0 */
host = msdc_get_host(MSDC_EMMC,MSDC_BOOT_EN,0);
BUG_ON(!host);
BUG_ON(!host->mmc);
BUG_ON(!host->mmc->card);
mmc_claim_host(host->mmc);
if (!mmc_can_trim(host->mmc->card)){
printk("emmc card can't support trim\n");
return 0;
}
mmc_erase(host->mmc->card, start, size,
__MMC_TRIM_ARG);
#if DEBUG_MMC_IOCTL
printk("erase done....\n");
#endif
mmc_release_host(host->mmc);
return 0;
}
static void mmc_set_erase_size(struct mmc_card *card)
{
if (card->ext_csd.erase_group_def & 1)
card->erase_size = card->ext_csd.hc_erase_size;
else
card->erase_size = card->csd.erase_size;
mmc_init_erase(card);
#ifdef CONFIG_MMC_DISCARD_MOVINAND
if (mmc_can_trim(card) && card->cid.manfid == MMC_CSD_MANFID_MOVINAND)
mmc_send_trimsize(card, &card->pref_trim);
#endif /* CONFIG_MMC_DISCARD_MOVINAND */
}
/* call mmc block layer interface for userspace to do erase operate */
static int simple_mmc_erase_func(unsigned int start, unsigned int size)
{
struct msdc_host *host;
unsigned int arg;
/* emmc always in slot0 */
host = msdc_get_host(MSDC_EMMC,MSDC_BOOT_EN,0);
BUG_ON(!host);
BUG_ON(!host->mmc);
BUG_ON(!host->mmc->card);
mmc_claim_host(host->mmc);
if (mmc_can_discard(host->mmc->card)) {
arg = __MMC_DISCARD_ARG;
} else if (mmc_can_trim(host->mmc->card)) {
arg = __MMC_TRIM_ARG;
} else if (mmc_can_erase(host->mmc->card)) {
/* mmc_erase() will remove the erase group un-aligned part,
* msdc_command_start() will do trim for old combo erase un-aligned issue
*/
arg = __MMC_ERASE_ARG;
} else {
pr_err("[%s]: emmc card can't support trim / discard / erase\n", __func__);
goto end;
}
pr_debug("[%s]: start=0x%x, size=%d, arg=0x%x, can_trim=(0x%x),EXT_CSD_SEC_GB_CL_EN=0x%lx\n",
__func__, start, size, arg, host->mmc->card->ext_csd.sec_feature_support,
EXT_CSD_SEC_GB_CL_EN);
mmc_erase(host->mmc->card, start, size, arg);
#if DEBUG_MMC_IOCTL
pr_debug("[%s]: erase done....arg=0x%x\n", __func__, arg);
#endif
end:
mmc_release_host(host->mmc);
return 0;
}
MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
card->ext_csd.enhanced_area_offset);
MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
MMC_DEV_ATTR(caps, "0x%08x\n", (unsigned int)(card->host->caps));
MMC_DEV_ATTR(caps2, "0x%08x\n", card->host->caps2);
MMC_DEV_ATTR(erase_type, "MMC_CAP_ERASE %s, type %s, SECURE %s, Sanitize %s\n",
card->host->caps & MMC_CAP_ERASE ? "enabled" : "disabled",
mmc_can_discard(card) ? "DISCARD" :
(mmc_can_trim(card) ? "TRIM" : "NORMAL"),
(!(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN) && mmc_can_secure_erase_trim(card)) ?
"supportable" : "disabled",
mmc_can_sanitize(card) ? "enabled" : "disabled");
static struct attribute *mmc_std_attrs[] = {
&dev_attr_cid.attr,
&dev_attr_csd.attr,
&dev_attr_date.attr,
&dev_attr_erase_size.attr,
&dev_attr_preferred_erase_size.attr,
&dev_attr_fwrev.attr,
&dev_attr_hwrev.attr,
&dev_attr_manfid.attr,
&dev_attr_name.attr,
&dev_attr_oemid.attr,
/**
* mmc_init_queue - initialise a queue structure.
* @mq: mmc queue
* @card: mmc card to attach this queue
* @lock: queue lock
*
* Initialise a MMC card request queue.
*/
int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock)
{
struct mmc_host *host = card->host;
u64 limit = BLK_BOUNCE_HIGH;
int ret;
if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
limit = *mmc_dev(host)->dma_mask;
mq->card = card;
mq->queue = blk_init_queue(mmc_request, lock);
if (!mq->queue)
return -ENOMEM;
mq->queue->queuedata = mq;
mq->req = NULL;
blk_queue_prep_rq(mq->queue, mmc_prep_request);
blk_queue_ordered(mq->queue, QUEUE_ORDERED_DRAIN);
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mq->queue);
if (mmc_can_erase(card)) {
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, mq->queue);
mq->queue->limits.max_discard_sectors = UINT_MAX;
if (card->erased_byte == 0)
mq->queue->limits.discard_zeroes_data = 1;
if (!mmc_can_trim(card) && is_power_of_2(card->erase_size)) {
mq->queue->limits.discard_granularity =
card->erase_size << 9;
mq->queue->limits.discard_alignment =
card->erase_size << 9;
}
if (mmc_can_secure_erase_trim(card))
queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD,
mq->queue);
}
#ifdef CONFIG_MMC_BLOCK_BOUNCE
if (host->max_hw_segs == 1) {
unsigned int bouncesz;
bouncesz = MMC_QUEUE_BOUNCESZ;
if (bouncesz > host->max_req_size)
bouncesz = host->max_req_size;
if (bouncesz > host->max_seg_size)
bouncesz = host->max_seg_size;
if (bouncesz > (host->max_blk_count * 512))
bouncesz = host->max_blk_count * 512;
if (bouncesz > 512) {
mq->bounce_buf = kmalloc(bouncesz, GFP_KERNEL);
if (!mq->bounce_buf) {
printk(KERN_WARNING "%s: unable to "
"allocate bounce buffer\n",
mmc_card_name(card));
}
}
if (mq->bounce_buf) {
blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_ANY);
blk_queue_max_hw_sectors(mq->queue, bouncesz / 512);
blk_queue_max_segments(mq->queue, bouncesz / 512);
blk_queue_max_segment_size(mq->queue, bouncesz);
mq->sg = kmalloc(sizeof(struct scatterlist),
GFP_KERNEL);
if (!mq->sg) {
ret = -ENOMEM;
goto cleanup_queue;
}
sg_init_table(mq->sg, 1);
mq->bounce_sg = kmalloc(sizeof(struct scatterlist) *
bouncesz / 512, GFP_KERNEL);
if (!mq->bounce_sg) {
ret = -ENOMEM;
goto cleanup_queue;
}
sg_init_table(mq->bounce_sg, bouncesz / 512);
}
}
#endif
if (!mq->bounce_buf) {
blk_queue_bounce_limit(mq->queue, limit);
blk_queue_max_hw_sectors(mq->queue,
min(host->max_blk_count, host->max_req_size / 512));
blk_queue_max_segments(mq->queue, host->max_hw_segs);
blk_queue_max_segment_size(mq->queue, host->max_seg_size);
mq->sg = kmalloc(sizeof(struct scatterlist) *
host->max_phys_segs, GFP_KERNEL);
if (!mq->sg) {
ret = -ENOMEM;
goto cleanup_queue;
}
sg_init_table(mq->sg, host->max_phys_segs);
}
init_MUTEX(&mq->thread_sem);
mq->thread = kthread_run(mmc_queue_thread, mq, "mmcqd");
if (IS_ERR(mq->thread)) {
ret = PTR_ERR(mq->thread);
goto free_bounce_sg;
}
return 0;
free_bounce_sg:
if (mq->bounce_sg)
kfree(mq->bounce_sg);
mq->bounce_sg = NULL;
cleanup_queue:
if (mq->sg)
kfree(mq->sg);
mq->sg = NULL;
if (mq->bounce_buf)
kfree(mq->bounce_buf);
mq->bounce_buf = NULL;
blk_cleanup_queue(mq->queue);
return ret;
}