linux.git/drivers/mmc/core/block.c, branch v4.12

mmc: block: Factor out data preparation

2017-04-24T19:42:04+00:00

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 
Reviewed-by: Linus Walleij 
Signed-off-by: Ulf Hansson

mmc: block: Change mmc_apply_rel_rw() to get block address from the request

2017-04-24T19:42:04+00:00

mmc_apply_rel_rw() will be used by Software Command Queuing also. In that
case the command argument is not the block address so change
mmc_apply_rel_rw() to get block address from the request.

Signed-off-by: Adrian Hunter 
Reviewed-by: Linus Walleij 
Signed-off-by: Ulf Hansson

mmc: block: Disable Command Queue while RPMB is used

2017-04-24T19:42:03+00:00

RPMB does not allow Command Queue commands. Disable and re-enable the
Command Queue when switching.

Note that the driver only switches partitions when the queue is empty.

Signed-off-by: Adrian Hunter 
Reviewed-by: Harjani Ritesh 
Reviewed-by: Linus Walleij 
Signed-off-by: Ulf Hansson

mmc: queue: Share mmc request array between partitions

2017-04-24T19:42:01+00:00

eMMC can have multiple internal partitions that are represented as separate
disks / queues. However switching between partitions is only done when the
queue is empty. Consequently the array of mmc requests that are queued can
be shared between partitions saving memory.

Keep a pointer to the mmc request queue on the card, and use that instead
of allocating a new one for each partition.

Signed-off-by: Adrian Hunter 
Reviewed-by: Linus Walleij 
Signed-off-by: Ulf Hansson

mmc: block: Introduce queue semantics

2017-04-24T19:42:00+00:00

Change from viewing the requests in progress as 'current' and 'previous',
to viewing them as a queue. The current request is allocated to the first
free slot. The presence of incomplete requests is determined from the
count (mq->qcnt) of entries in the queue. Non-read-write requests (i.e.
discards and flushes) are not added to the queue at all and require no
special handling. Also no special handling is needed for the
MMC_BLK_NEW_REQUEST case.

As well as allowing an arbitrarily sized queue, the queue thread function
is significantly simpler.

Signed-off-by: Adrian Hunter 
Reviewed-by: Linus Walleij 
Signed-off-by: Ulf Hansson

mmc: block: Use local var for mqrq_cur

2017-04-24T19:42:00+00:00

A subsequent patch will remove 'mq->mqrq_cur'. Prepare for that by
assigning it to a local variable.

Signed-off-by: Adrian Hunter 
Reviewed-by: Linus Walleij 
Signed-off-by: Ulf Hansson

mmc: core: mmc_blk_rw_cmd_err - remove unused variable

2017-03-16T14:19:07+00:00

Fix compilation warning:

drivers/mmc/core/block.c:1563:24: warning: variable ‘mq_rq’ set but not
used [-Wunused-but-set-variable]  struct mmc_queue_req *mq_rq;

Signed-off-by: Tomas Winkler 
Signed-off-by: Ulf Hansson

mmc: block: Fix cmd error reset failure path

2017-03-14T16:13:25+00:00

Commit 4e1f780032c5 ("mmc: block: break out mmc_blk_rw_cmd_abort()")
assumed the request had not completed, but in one case it had. Fix that.

Fixes: 4e1f780032c5 ("mmc: block: break out mmc_blk_rw_cmd_abort()")
Signed-off-by: Adrian Hunter 
Reviewed-by: Linus Walleij 
Signed-off-by: Ulf Hansson

mmc: block: Fix is_waiting_last_req set incorrectly

2017-03-14T16:13:25+00:00

Commit 15520111500c ("mmc: core: Further fix thread wake-up") allowed a
queue to release the host with is_waiting_last_req set to true. A queue
waiting to claim the host will not reset it, which can result in the
queue getting stuck in a loop.

Fixes: 15520111500c ("mmc: core: Further fix thread wake-up")
Signed-off-by: Adrian Hunter 
Cc: stable@vger.kernel.org # v4.10+
Signed-off-by: Ulf Hansson

mmc: core: add mmc prefix for blk_fixups

2017-02-15T10:34:27+00:00

That makes all the quirks table look more consistent.

Signed-off-by: Shawn Lin 
Signed-off-by: Ulf Hansson