[PATCH V7 06/10] mmc: block: Prepare CQE data
From: Adrian Hunter <adrian.hunter@intel.com>
Date: 2017-08-31 12:04:01
Also in:
linux-mmc
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Ulf Hansson, Linus Torvalds
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> --- drivers/mmc/core/block.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 1ec5f0bc98d2..2424c7360687 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c@@ -1554,6 +1554,7 @@ 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;
@@ -1568,6 +1569,14 @@ 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
@@ -1597,8 +1606,10 @@ 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
@@ -1610,6 +1621,9 @@ 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;
--
1.9.1