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mmc: block: Factor out data preparation 

Factor out data preparation into a separate function mmc_blk_data_prep()
which can be re-used for command queuing.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2017-03-13 14:36:41 +02:00 committed by Ulf Hansson
parent 9cb38f7a2d
commit ca5717f7ce
1 changed files with 82 additions and 69 deletions
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149
drivers/mmc/core/block.c
View File

@ -1433,36 +1433,39 @@ static enum mmc_blk_status mmc_blk_err_check(struct mmc_card *card,
return MMC_BLK_SUCCESS;
}
static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
struct mmc_card *card,
int disable_multi,
struct mmc_queue *mq)
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)
{
u32 readcmd, writecmd;
struct mmc_blk_data *md = mq->blkdata;
struct mmc_card *card = md->queue.card;
struct mmc_blk_request *brq = &mqrq->brq;
struct request *req = mqrq->req;
struct mmc_blk_data *md = mq->blkdata;
bool do_data_tag;
/*
* Reliable writes are used to implement Forced Unit Access and
* are supported only on MMCs.
*/
bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
(rq_data_dir(req) == WRITE) &&
*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));
brq->mrq.cmd = &brq->cmd;
brq->mrq.data = &brq->data;
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;
brq->data.blksz = 512;
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);
/*
@ -1493,6 +1496,68 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
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;
mmc_queue_bounce_pre(mqrq);
}
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 = mqrq->req;
struct mmc_blk_data *md = mq->blkdata;
bool do_rel_wr, do_data_tag;
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.
@ -1507,32 +1572,7 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
readcmd = MMC_READ_SINGLE_BLOCK;
writecmd = MMC_WRITE_BLOCK;
}
if (rq_data_dir(req) == READ) {
brq->cmd.opcode = readcmd;
brq->data.flags = MMC_DATA_READ;
if (brq->mrq.stop)
brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
MMC_CMD_AC;
} else {
brq->cmd.opcode = writecmd;
brq->data.flags = MMC_DATA_WRITE;
if (brq->mrq.stop)
brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
MMC_CMD_AC;
}
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);
brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd;
/*
* Pre-defined multi-block transfers are preferable to
@ -1563,34 +1603,7 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
brq->mrq.sbc = &brq->sbc;
}
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;
mqrq->areq.err_check = mmc_blk_err_check;
mmc_queue_bounce_pre(mqrq);
}
static bool mmc_blk_rw_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,