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mmc: block: Prepare CQE data

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Enhance mmc_blk_data_prep() to support CQE requests. That means adding
some things that for non-CQE requests would be encoded into the command
arguments - such as the block address, reliable-write flag, and data tag
flag. Also the request tag is needed to provide the command queue task id,
and a comment is added to explain the future possibility of defining a
priority.

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 2017-09-22 15:36:56 +03:00 committed by Ulf Hansson
parent d3377c012f
commit 93482b3d70
1 changed files with 15 additions and 1 deletions
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16
drivers/mmc/core/block.c
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@ -1595,6 +1595,7 @@ static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
memset(brq, 0, sizeof(struct mmc_blk_request));
brq->mrq.data = &brq->data;
brq->mrq.tag = req->tag;
brq->stop.opcode = MMC_STOP_TRANSMISSION;
brq->stop.arg = 0;
@ -1609,6 +1610,14 @@ static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
brq->data.blksz = 512;
brq->data.blocks = blk_rq_sectors(req);
brq->data.blk_addr = blk_rq_pos(req);
/*
* The command queue supports 2 priorities: "high" (1) and "simple" (0).
* The eMMC will give "high" priority tasks priority over "simple"
* priority tasks. Here we always set "simple" priority by not setting
* MMC_DATA_PRIO.
*/
/*
* The block layer doesn't support all sector count
@ -1638,8 +1647,10 @@ static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
brq->data.blocks);
}
if (do_rel_wr)
if (do_rel_wr) {
mmc_apply_rel_rw(brq, card, req);
brq->data.flags |= MMC_DATA_REL_WR;
}
/*
* Data tag is used only during writing meta data to speed
@ -1651,6 +1662,9 @@ static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
((brq->data.blocks * brq->data.blksz) >=
card->ext_csd.data_tag_unit_size);
if (do_data_tag)
brq->data.flags |= MMC_DATA_DAT_TAG;
mmc_set_data_timeout(&brq->data, card);
brq->data.sg = mqrq->sg;