libs/rt-thread
libs
/
rt-thread
4
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[sdio] Limit the data size per request based on the sdio controller driver configuration parameters.

This commit is contained in:
weety 2018-09-08 23:21:13 +08:00
parent 7deaadd782
commit 618e185cd3
1 changed files with 36 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
components/drivers/sdio/block_dev.c
View File

@ -29,6 +29,8 @@
static rt_list_t blk_devices = RT_LIST_OBJECT_INIT(blk_devices);
#define BLK_MIN(a, b) ((a) < (b) ? (a) : (b))
struct mmcsd_blk_device
{
struct rt_mmcsd_card *card;
@ -36,6 +38,7 @@ struct mmcsd_blk_device
struct rt_device dev;
struct dfs_partition part;
struct rt_device_blk_geometry geometry;
rt_size_t max_req_size;
};
#ifndef RT_MMCSD_MAX_PARTITION
@ -240,18 +243,29 @@ static rt_size_t rt_mmcsd_read(rt_device_t dev,
rt_size_t size)
{
rt_err_t err;
rt_size_t offset = 0;
rt_size_t req_size = 0;
rt_size_t remain_size = size;
void *rd_ptr = (void *)buffer;
struct mmcsd_blk_device *blk_dev = (struct mmcsd_blk_device *)dev->user_data;
struct dfs_partition *part = &blk_dev->part;
if (dev == RT_NULL)
{
rt_set_errno(-EINVAL);
return 0;
}
rt_sem_take(part->lock, RT_WAITING_FOREVER);
err = rt_mmcsd_req_blk(blk_dev->card, part->offset + pos, buffer, size, 0);
while (remain_size)
{
req_size = (size > blk_dev->max_req_size) ? blk_dev->max_req_size : remain_size;
err = rt_mmcsd_req_blk(blk_dev->card, part->offset + pos + offset, rd_ptr, req_size, 0);
if (err)
break;
offset += req_size;
remain_size -= req_size;
}
rt_sem_release(part->lock);
/* the length of reading must align to SECTOR SIZE */
@ -260,7 +274,7 @@ static rt_size_t rt_mmcsd_read(rt_device_t dev,
rt_set_errno(-EIO);
return 0;
}
return size;
return size - remain_size;
}
static rt_size_t rt_mmcsd_write(rt_device_t dev,
@ -269,18 +283,29 @@ static rt_size_t rt_mmcsd_write(rt_device_t dev,
rt_size_t size)
{
rt_err_t err;
rt_size_t offset = 0;
rt_size_t req_size = 0;
rt_size_t remain_size = size;
void *wr_ptr = (void *)buffer;
struct mmcsd_blk_device *blk_dev = (struct mmcsd_blk_device *)dev->user_data;
struct dfs_partition *part = &blk_dev->part;
if (dev == RT_NULL)
{
rt_set_errno(-EINVAL);
return 0;
}
rt_sem_take(part->lock, RT_WAITING_FOREVER);
err = rt_mmcsd_req_blk(blk_dev->card, part->offset + pos, (void *)buffer, size, 1);
while (remain_size)
{
req_size = (size > blk_dev->max_req_size) ? blk_dev->max_req_size : remain_size;
err = rt_mmcsd_req_blk(blk_dev->card, part->offset + pos + offset, wr_ptr, req_size, 1);
if (err)
break;
offset += req_size;
remain_size -= req_size;
}
rt_sem_release(part->lock);
/* the length of reading must align to SECTOR SIZE */
@ -290,7 +315,7 @@ static rt_size_t rt_mmcsd_write(rt_device_t dev,
return 0;
}
return size;
return size - remain_size;
}
static rt_int32_t mmcsd_set_blksize(struct rt_mmcsd_card *card)
@ -369,6 +394,11 @@ rt_int32_t rt_mmcsd_blk_probe(struct rt_mmcsd_card *card)
break;
}
blk_dev->max_req_size = BLK_MIN((card->host->max_seg_size *
card->host->max_seg_size) >> 9,
(card->host->max_blk_count *
card->host->max_blk_size) >> 9);
/* get the first partition */
status = dfs_filesystem_get_partition(&blk_dev->part, sector, i);
if (status == RT_EOK)