Adrian Hunter [Mon, 20 Mar 2017 17:50:31 +0000 (19:50 +0200)]
mmc: sdhci: Optimize delay loops
The delay loops for reset and clock enable always take at least 1 ms
because they use mdelay(1). However they can take a lot less time e.g. less
than 50us. Use ktime and reduce the delay to 10 microseconds per loop.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Ludovic Desroches <ludovic.desroches@microchip.com>
(cherry picked from commit
5a436cc0af6202265de0d2d2d35f1b4fd85caf3b)
tcharding [Wed, 15 Mar 2017 08:48:04 +0000 (19:48 +1100)]
mmc: core: simplify return code
File contains multiple functions doing variations on the same thing,
sdio_readb(), sdio_writeb()f, sdio_readw(), sdio_writew()
etc. Although the functions have very similar logic the code is laid
out in a variety of ways. This makes it overly complicated to
read. There is a already a nice clean chunk of code, if we use this
format for all instances then we will have cleaned up the code,
reduced the line count and lessened the cognitive load required while
reading. Less lines equals less bugs.
Pick the most simple and clear code flow and change all functions to
be the same.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8e11b284eaa86863f700216e4d3c87e7d7b3f44c)
tcharding [Wed, 15 Mar 2017 08:48:03 +0000 (19:48 +1100)]
mmc: core: guard dereference of optional parameter
Various functions take as parameter an optional pointer. Pointer
should be guarded with non-NULL check before dereferencing.
Add non-NULL check before dereference of pointer.
Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
9b980d950e5bcdce6dbc15a9c00ff960beeea28b)
Winkler, Tomas [Thu, 9 Mar 2017 14:58:21 +0000 (16:58 +0200)]
mmc: core: mmc_blk_rw_cmd_err - remove unused variable
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 <tomas.winkler@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8bcd37d8b21de13d068414c018c9599281294a01)
Adrian Hunter [Mon, 13 Mar 2017 12:36:33 +0000 (14:36 +0200)]
mmc: block: Fix cmd error reset failure path
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 <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8ecc34448e24e9e8a8f3a9b37be70b43c6af5288)
Adrian Hunter [Mon, 13 Mar 2017 12:36:32 +0000 (14:36 +0200)]
mmc: block: Fix is_waiting_last_req set incorrectly
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 <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v4.10+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
2602b740e45cc64feb55d5a9ee8db744ab3becbb)
Shawn Lin [Wed, 15 Feb 2017 08:36:47 +0000 (16:36 +0800)]
mmc: core: add mmc prefix for blk_fixups
That makes all the quirks table look more consistent.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8c7cdbf9272c300dc093da3c62fa3b4bc6dc960e)
Shawn Lin [Wed, 15 Feb 2017 08:35:31 +0000 (16:35 +0800)]
mmc: core: move all quirks together into quirks.h
It's not appreciated to place quirks everywhere, let's
put them together just like what we do for USB, PCI etc.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
0e9cfcf44e4aced8d45f409dcb48a0994fa77979)
Shawn Lin [Wed, 15 Feb 2017 08:35:30 +0000 (16:35 +0800)]
mmc: core: improve the quirks for sdio devices
Rename mmc_fixup_methods to sdio_fixup_methods to better
reflect that it's for sdio devices. So we could also pass
on it from sdio card's probe sequence just like what we do
for eMMC and block there.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
1144c1e4ddab9339e262e2702744e8f5c6220824)
Shawn Lin [Wed, 15 Feb 2017 08:35:29 +0000 (16:35 +0800)]
mmc: core: move some sdio IDs out of quirks file
Consolidate all the sdio devices' IDs into sdio_ids.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
884f38607897cb4a963ea8a65296f0973a2828d0)
Shawn Lin [Wed, 15 Feb 2017 08:35:28 +0000 (16:35 +0800)]
mmc: core: change quirks.c to be a header file
Rename quirks.c to quirks.h, and include it for
individual C files which need it.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
28fc64af63488d701184977481b263f31d856984)
Uri Yanai [Tue, 7 Feb 2017 16:00:01 +0000 (18:00 +0200)]
mmc: Adding AUTO_BKOPS_EN bit set for Auto BKOPS support
Adding dedicated flag for AUTO_BKOPS in card->ext_csd structure.
Read AUTO_BKOPS bit value from the device EXT_CSD and set to the
card->ext_csd structure.
In mmc_decode_ext_csd() add a print message in case the AUTO_BKOPS
is enabled
Signed-off-by: Uri Yanai <uri.yanai@sandisk.com>
Signed-off-by: Alex Lemberg <alex.lemberg@sandisk.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
efff8e7879b8b7f8a077f495262f0bb9cfaa0b06)
Uri Yanai [Tue, 7 Feb 2017 16:00:00 +0000 (18:00 +0200)]
mmc: MAN_BKOPS_EN inverse debug message logic
Inverse the logic for printing the debug message.
In mmc_decode_ext_csd() print message when MAN_BKOPS_EN is set
Signed-off-by: Uri Yanai <uri.yanai@sandisk.com>
Signed-off-by: Alex Lemberg <alex.lemberg@sandisk.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
6962c2fb201878722ef78b513dae7c22dfa4919c)
Linus Walleij [Wed, 1 Feb 2017 12:48:00 +0000 (13:48 +0100)]
mmc: core: start to break apart mmc_start_areq()
This function is doing to many clever things at the same time under
too many various conditions.
Start to make things clearer by refactoring: break out the
finalization of the previous asynchronous request to its own
function mmc_finalize_areq(). We can get rid of the default
assignment of status and let the call deal with this.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
37dac0681e2be4f3c32b090a8c0591d4ce57e6f0)
Linus Walleij [Wed, 1 Feb 2017 12:47:58 +0000 (13:47 +0100)]
mmc: block: respect bool returned from blk_end_request()
The return value from blk_end_request() is a bool but is
treated like an int. This is generally safe, but the variable
also has the opaque name "ret" and gets returned from the
helper function mmc_blk_cmd_err().
- Switch the variable to a bool, applies everywhere.
- Return a bool from mmc_blk_cmd_err() and rename the function
mmc_blk_rw_cmd_err() to indicate through the namespace that
this is a helper for mmc_blk_issue_rw_rq().
- Rename the variable from "ret" to "req_pending" inside the
while() loop inside mmc_blk_issue_rq_rq(), which finally
makes it very clear what this while loop is waiting for.
- Augment the argument "ret" to mmc_blk_rq_cmd_err() to
old_req_pending so it becomes evident that this is an
older state, and it is returned only if we fail to get
the number of written blocks from an SD card in the
function mmc_sd_num_wr_blocks().
- Augment the while() loop in mmc_blk_rq_cmd_abort(): it
is evident now that we know this is a bool variable,
that the function is just spinning waiting for
blk_end_request() to return false.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
0e65f10cf1774a27acf9e933e006f1e55a4ef642)
Linus Walleij [Wed, 1 Feb 2017 12:47:57 +0000 (13:47 +0100)]
mmc: block: return errorcode from mmc_sd_num_wr_blocks()
mmc_sd_num_wr_blocks() has an interesting construction that
saves one return argument by casting (u32)-1 as error code
if something goes wrong.
This is however a bit confusing when the normal kernel
pattern is to return an int error code on success.
So instead pass a variable "blocks" that the function can
fill in with the number of successfully transferred blocks
and return an integer as error code.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[Ulf: Changed a return code to -EIO, reported by Dan Carpenter and fixed
by Linus Walleij]
(cherry picked from commit
169f03a064c230de6d715bdd62112eb12256fce3)
Linus Walleij [Wed, 1 Feb 2017 12:47:56 +0000 (13:47 +0100)]
mmc: queue: turn queue flags into bools
Instead of masking and setting two bits in the "flags" field
for the mmc_queue, just use two bools named "suspended" and
"new_request".
The masking and setting would likely have race conditions
anyways, it is better to use a simple member like this.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
9491be5ff06ff08d61e6a8d767382ea0037a6f38)
Linus Walleij [Wed, 1 Feb 2017 12:47:55 +0000 (13:47 +0100)]
mmc: block: rename mmc_active to areq
The mmc_active member of struct mmc_queue_req has a very
confusing name: this is certainly not always "active", it is
the asynchronous request associated by the mmc_queue_req
but it is not guaranteed to be "active" in any sense, such
as being running on the host.
Simply rename this member to "areq".
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
74f5ba357c7cd63c664e65fb7a116dbc0538a2ec)
Linus Walleij [Wed, 1 Feb 2017 12:47:54 +0000 (13:47 +0100)]
mmc: block: refactor mmc_blk_rw_try_restart()
The mmc_blk_rw_start_new() was named after the label inside
mmc_blk_issue_rw_rq() but is really a confusing name for this
function: what it does is to try to restart the latest issued
command on the host and card of the current MMC queue.
So rename it mmc_blk_rw_try_restart() that reflects what it
is doing and at this point also refactore the function to
treat the removed card as an exception and just exit if this
happens and run on in the function if that is not happening.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
b2928e1049e1d96ac794293d18168c721dbfdb24)
Linus Walleij [Wed, 1 Feb 2017 12:47:53 +0000 (13:47 +0100)]
mmc: core: rename mmc_start_req() to *areq()
With the coexisting __mmc_start_request(), mmc_start_request()
and __mmc_start_req() it is a bit confusing that mmc_start_req()
actually does not start a normal request, but an asynchronous
request.
Rename it to mmc_start_areq() to make it explicit what the
function is doing, also fix the kerneldoc for this function
while we're at it.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
c3399ef55d8e8295293808eba32e3f7056526324)
Linus Walleij [Wed, 1 Feb 2017 12:47:52 +0000 (13:47 +0100)]
mmc: block: rename rqc and req
In the function mmc_blk_issue_rw_rq() the new request coming in
from the block layer is called "rqc" and the old request that
was potentially just returned back from the asynchronous
mechanism is called "req".
This is really confusing when trying to analyze and understand
the code, it becomes a perceptual nightmare to me. Maybe others
have better parserheads but it is not working for me.
Rename "rqc" to "new_req" and "req" to "old_req" to reflect what
is semantically going on into the syntax.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
acd8dbd64a2adcd950c31261247cda6f847f57eb)
Linus Walleij [Wed, 1 Feb 2017 12:47:51 +0000 (13:47 +0100)]
mmc: block: inline the command abort and start new goto:s
The goto statements sprinkled over the mmc_blk_issue_rw_rq()
function has grown over the years and makes the code pretty hard
to read.
Inline the calls such that:
goto cmd_abort; ->
mmc_blk_rw_cmd_abort(card, req);
mmc_blk_rw_start_new(mq, card, rqc);
return;
goto start_new_req; ->
mmc_blk_rw_start_new(mq, card, rqc);
return;
After this it is more clear how we exit the do {} while
loop in this function, and it gets possible to split the
code apart.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
db435505b561c1ca7b72c646dbc060f0c674360c)
Linus Walleij [Fri, 27 Jan 2017 14:04:54 +0000 (15:04 +0100)]
mmc: core/mmci: restore pre/post_req behaviour
commit
64b12a68a9f74bb32d8efd7af1ad8a2ba02fc884
"mmc: core: fix prepared requests while doing bkops"
is fixing a bug in the wrong way. A bug in the MMCI
device driver is fixed by amending the MMC core.
Thinking about it: what the pre- and post-callbacks
are doing is to essentially map and unmap SG lists
for DMA transfers. Why would we not be able to do that
just because a BKOPS command is sent inbetween?
Having to unprepare/prepare the next asynchronous
request for DMA seems wrong.
Looking the backtrace in that commit we can see what
the real problem actually is:
mmci_data_irq() is calling mmci_dma_unmap() twice
which is goung to call arm_dma_unmap_sg() twice
and v7_dma_inv_range() twice for the same sglist
and that will crash.
This happens because a request is prepared, then
a BKOPS is sent. The IRQ completing the BKOPS command
goes through mmci_data_irq() and thinks that a DMA
operation has just been completed because
dma_inprogress() reports true. It then proceeds to
unmap the sglist.
But that was wrong! dma_inprogress() should NOT be
true because no DMA was actually in progress! We had
just prepared the sglist, and the DMA channel
dma_current has been configured, but NOT started!
Because of this, the sglist is already unmapped when
we get our actual data completion IRQ, and we are
unmapping the sglist once more, and we get this crash.
Therefore, we need to revert this solution pushing
the problem to the core and causing problems, and
instead augment the implementation such that
dma_inprogress() only reports true if some DMA has
actually been started.
After this we can keep the request prepared during the
BKOPS and we need not unprepare/reprepare it.
Fixes:
64b12a68a9f7 ("mmc: core: fix prepared requests while doing bkops")
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
e13934bdf45935f51243515c275629922dc43839)
Ulf Hansson [Wed, 25 Jan 2017 11:45:43 +0000 (12:45 +0100)]
mmc: core: Extend mmc_of_parse() to check for mmc-ddr-3_3v
When mmc_of_parse() finds the binding, it sets the mmc cap,
MMC_CAP_3_3V_DDR, which informs the core whether eMMC DDR at 3.3V I/O is
supported by the mmc host.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Jan Glauber <jglauber@cavium.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
(cherry picked from commit
fb00f196fcce8078e162d09a1d7725032c2dfdc8)
Conflicts:
drivers/mmc/core/host.c
Ulf Hansson [Wed, 25 Jan 2017 11:44:13 +0000 (12:44 +0100)]
mmc: dt: Document binding for eMMC DDR 3.3V I/O voltage support
Cc: <devicetree@vger.kernel.org>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Jan Glauber <jglauber@cavium.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Rob Herring <robh@kernel.org>
(cherry picked from commit
41efc76e0c0414d1e38a9d974a544aa80a653956)
Ulf Hansson [Wed, 25 Jan 2017 11:04:17 +0000 (12:04 +0100)]
mmc: core: Invent MMC_CAP_3_3V_DDR
According the JEDEC specification an eMMC card supporting 1.8V vccq in DDR
mode should also be capable of 3.3V. However, it's been reported that some
mmc hosts supports 3.3V, but not 1.8V.
Currently the mmc core implements an error handling when the host fails to
set 1.8V for vccq, by falling back to 3.3V. Unfortunate, this seems to be
insufficient for some mmc hosts. To enable these to use eMMC DDR mode let's
invent a new mmc cap, MMC_CAP_3_3V_DDR, which tells whether they support
the eMMC 3.3V DDR mode.
In case MMC_CAP_3_3V_DDR is set, but not MMC_CAP_1_8V_DDR, let's change to
remain on the 3.3V, as it's the default voltage level for vccq, set by the
earlier power up sequence.
As this change introduces MMC_CAP_3_3V_DDR, let's take the opportunity to
do some re-formatting of the related defines in the header file.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Jan Glauber <jglauber@cavium.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
(cherry picked from commit
20f921bb01140207983e9fc3af4bb60f1f9fc0d5)
Ulf Hansson [Wed, 25 Jan 2017 10:12:34 +0000 (11:12 +0100)]
mmc: core: Rename __mmc_set_signal_voltage() to mmc_set_signal_voltage()
Earlier the mmc_set_signal_voltage() existed, but since it has been renamed
to mmc_set_uhs_voltage(), we can now use that name instead.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Jan Glauber <jglauber@cavium.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
(cherry picked from commit
4e74b6b3c6e9adfe6a8fdebfc56a6416a996d905)
Ulf Hansson [Wed, 25 Jan 2017 09:25:01 +0000 (10:25 +0100)]
mmc: core: Clarify usage of mmc_set_signal_voltage()
The mmc_set_signal_voltage() function is used for SD/SDIO when switching to
1.8V for UHS mode. To clarify this let's do the following changes.
- We are always providing MMC_SIGNAL_VOLTAGE_180 as the signal_voltage
parameter to the function. Then, let's just remove the parameter as it
serves no purpose.
- Rename the function to mmc_set_uhs_voltage().
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Jan Glauber <jglauber@cavium.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
(cherry picked from commit
2ed573b603f78289dd1435c94597aa25a97e2b76)
Ulf Hansson [Wed, 25 Jan 2017 09:12:10 +0000 (10:12 +0100)]
mmc: core: Remove redundant code in mmc_set_signal_voltage()
The mmc_set_signal_voltage() function is used for SD/SDIO when switching to
1.8V for UHS mode. Therefore let's remove the redundant code dealing with
MMC_SIGNAL_VOLTAGE_330.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Jan Glauber <jglauber@cavium.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
(cherry picked from commit
a44efa4796249c6d4341935e90e9105d6e1a5f15)
Linus Walleij [Tue, 24 Jan 2017 10:17:57 +0000 (11:17 +0100)]
mmc: block: stop passing around pointless return values
The mmc_blk_issue_rq() function is called in exactly one place
in queue.c and there the return value is ignored. So the
functions called from that function that also meticulously
return 0/1 do so for no good reason.
Error reporting on the asynchronous requests are done upward to
the block layer when the requests are eventually completed or
fail, which may happen during the flow of the mmc_blk_issue_*
functions directly (for "special commands") or later, when an
asynchronous read/write request is completed.
The issuing functions do not give rise to errors on their own,
and there is nothing to return back to the caller in queue.c.
Drop all return values and make the function return void.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
df0615889651321712b0b429780617d35c1ed963)
Linus Walleij [Tue, 24 Jan 2017 10:17:56 +0000 (11:17 +0100)]
mmc: block: introduce new_areq and old_areq
Recycling the same variable in an x=x+1 fashion may seem
clever here but it makes the code terse and hard to follow
for humans. Introduce a new_areq and old_areq variable so
we see what is going on.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
7d552a48089b6a24b65abe9c49a184bae8364abe)
Linus Walleij [Tue, 24 Jan 2017 10:17:55 +0000 (11:17 +0100)]
mmc: block: inline command abortions
Setting rqc to NULL followed by a goto to cmd_abort is just a way
to do unconditional abort without starting any new command.
Inline the calls to mmc_blk_rw_cmd_abort() and return immediately
in those cases.
Add some comments to the code flow so it is clear that this is
where the asynchronous requests come back in and the result of
them gets handled.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
da0dbaffe354043bb0cd61c00c650c819d104b29)
Linus Walleij [Tue, 24 Jan 2017 10:17:54 +0000 (11:17 +0100)]
mmc: block: do not assign mq_rq when aborting command
The code in mmc_blk_issue_rq_rq() aborts a command if the request
is not properly aligned on large sectors. As part of the path
jumping out, it assigns the local variable mq_rq reflecting
a MMC queue request to the current MMC queue request, which is
confusing since the variable is not used after this jump.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
6fb85d658308952142da6abb4e066dd22dd48c01)
Linus Walleij [Tue, 24 Jan 2017 10:17:53 +0000 (11:17 +0100)]
mmc: block: break out mmc_blk_rw_start_new()
As a step toward breaking apart the very complex function
mmc_blk_issue_rw_rq() we break out the code to start a new
request.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
efb5a05e70dfa79fe26133be9a239cbca8ea08c3)
Linus Walleij [Tue, 24 Jan 2017 10:17:52 +0000 (11:17 +0100)]
mmc: block: break out mmc_blk_rw_cmd_abort()
As a first step toward breaking apart the very complex function
mmc_blk_issue_rw_rq() we break out the command abort code.
This code assumes "ret" is != 0 and then repeatedly hammers
blk_end_request() until the request to the block layer to end
the request succeeds.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
4e1f780032c56894e8d7b6685b029b718588f483)
Conflicts:
drivers/mmc/core/block.c
Christoph Hellwig [Thu, 20 Oct 2016 13:12:15 +0000 (15:12 +0200)]
block: add a proper block layer data direction encoding
Currently the block layer op_is_write, bio_data_dir and rq_data_dir
helper treat every operation that is not a READ as a data out operation.
This worked surprisingly long, but the new REQ_OP_ZONE_REPORT operation
actually adds a second operation that reads data from the device.
Surprisingly nothing critical relied on this direction, but this might
be a good opportunity to properly fix this issue up.
We take a little inspiration and use the least significant bit of the
operation number to encode the data direction, which just requires us
to renumber the operations to fix this scheme.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit
87374179c535a98337569904727aa02f960fe79e)
Christoph Hellwig [Fri, 28 Oct 2016 14:48:16 +0000 (08:48 -0600)]
block: better op and flags encoding
Now that we don't need the common flags to overflow outside the range
of a 32-bit type we can encode them the same way for both the bio and
request fields. This in addition allows us to place the operation
first (and make some room for more ops while we're at it) and to
stop having to shift around the operation values.
In addition this allows passing around only one value in the block layer
instead of two (and eventuall also in the file systems, but we can do
that later) and thus clean up a lot of code.
Last but not least this allows decreasing the size of the cmd_flags
field in struct request to 32-bits. Various functions passing this
value could also be updated, but I'd like to avoid the churn for now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit
ef295ecf090d3e86e5b742fc6ab34f1122a43773)
Conflicts:
block/blk-mq.c
include/linux/blk_types.h
include/linux/blkdev.h
Christoph Hellwig [Thu, 20 Oct 2016 13:12:13 +0000 (15:12 +0200)]
block: split out request-only flags into a new namespace
A lot of the REQ_* flags are only used on struct requests, and only of
use to the block layer and a few drivers that dig into struct request
internals.
This patch adds a new req_flags_t rq_flags field to struct request for
them, and thus dramatically shrinks the number of common requests. It
also removes the unfortunate situation where we have to fit the fields
from the same enum into 32 bits for struct bio and 64 bits for
struct request.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit
e806402130c9c494e22c73ae9ead4e79d2a5811c)
Conflicts:
drivers/mmc/core/block.c
drivers/scsi/sd_zbc.c
Christoph Hellwig [Thu, 20 Oct 2016 13:12:12 +0000 (15:12 +0200)]
block: replace REQ_THROTTLED with a bio flag
It's the last bio-only REQ_* flag, and we have space for it in the bio
bi_flags field.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit
8d2bbd4c8236e9e38e6b36ac9e2c54fdcfe5b335)
Christoph Hellwig [Thu, 20 Oct 2016 13:12:11 +0000 (15:12 +0200)]
block: move REQ_RAHEAD to common flags
The information that am I/O is a read-ahead can be useful for drivers.
In fact the NVMe driver already checks it, even if it won't ever be set
at the moment.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit
188bd2b16b3c6ea87a90df20f33db0adcdb75f0c)
Christoph Hellwig [Thu, 20 Oct 2016 13:12:09 +0000 (15:12 +0200)]
block: remove bio_is_rw
With the addition of the zoned operations the tests in this function
became incorrect. But I think it's much better to just open code the
allow operations in the only caller anyway.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit
c4aebd0332da831a3403faf2035af45059ab6b7c)
Christoph Hellwig [Thu, 20 Oct 2016 13:12:10 +0000 (15:12 +0200)]
block: REQ_NOMERGE is common to the bio and request
So move it into the common setion of the request flags.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit
bd1c1c21741cbd6e894960bcbc8b36f719590064)
Ritesh Harjani [Tue, 10 Jan 2017 07:00:50 +0000 (12:30 +0530)]
mmc: sdhci: Clear SDHCI_HS400_TUNING flag after platform_execute_tuning
Clear SDHCI_HS400_TUNING flag after platform_execute_tuning
so that platform_execute_tuning may use it if needed.
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
Tested-by: Jeremy McNicoll <jeremymc@redhat.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8a8fa8797cea4e49119e437d254dd59b9ade16fd)
Ulf Hansson [Fri, 13 Jan 2017 13:14:16 +0000 (14:14 +0100)]
mmc: core: Don't use extern declarations of public mmc functions
Using extern when declaring functions in the public header, core.h, is
redundant. Let's just remove the use of it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
23888bfe9bd730d42e326cc5f6f1188beb948f97)
Ulf Hansson [Fri, 13 Jan 2017 13:14:15 +0000 (14:14 +0100)]
mmc: core: Move public functions from host.h to private headers
A significant amount of functions are available through the public mmc
host.h header file. Let's slim down this public mmc interface, as to
prevent users from abusing it, by moving some of the functions to private
mmc host.h header file.
This change concentrates on moving the functions into private mmc headers,
following changes may continue with additional clean-ups.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
5857b29b96dcf208e4903ec6f20d132e6a77cac2)
Ulf Hansson [Fri, 13 Jan 2017 13:14:14 +0000 (14:14 +0100)]
mmc: core: Move public functions from card.h to private headers
A significant amount of functions and other definitions are available
through the public mmc card.h header file. Let's slim down this public mmc
interface, as to prevent users from abusing it, by moving some of the
functions/definitions to private mmc header files.
This change concentrates on moving the functions into private mmc headers,
following changes may continue with additional clean-ups.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
4facdde11394d44b3869807841042d059f074a07)
Ulf Hansson [Fri, 13 Jan 2017 13:14:11 +0000 (14:14 +0100)]
mmc: core: Remove unused struct _mmc_csd from public mmc.h header
The struct _mmc_csd isn't being used and has been lurking around for a
while. Let's kill it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
009b0fcea5dfe77663f7ec3927c7c50a97a7675c)
Ulf Hansson [Fri, 13 Jan 2017 13:14:10 +0000 (14:14 +0100)]
mmc: core: Move erase/trim/discard defines from public core.h to mmc.h
As the public mmc.h header already contains similar defines for other mmc
commands and arguments, let's move those for erase/trim/discard into here
as well.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
c0a3e080f9294117a7d510a4f01a0b7c6dbcadae)
Ulf Hansson [Fri, 13 Jan 2017 13:14:09 +0000 (14:14 +0100)]
mmc: core: Move some host specific public functions to host.h
Ideally the public mmc header file, core.h, shouldn't contain interfaces
particularly intended to be used by host drivers. Instead those should
remain in the host.h header file. Therefore, let's move a couple functions
from core.h to host.h.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
9e1bbc72727506c173cc6ed1d704cb2d7911d9d5)
Conflicts:
include/linux/mmc/core.h
Simon Horman [Thu, 3 Nov 2016 14:15:59 +0000 (15:15 +0100)]
mmc: core: Add helper to see if a host can be retuned
This is in preparation for restoring saved tuning parameters
when resuming the TMIO driver.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
c820af5f18ec248b3cb61a9a9ce47ef0f2e9ec63)
Ulf Hansson [Fri, 13 Jan 2017 13:14:08 +0000 (14:14 +0100)]
mmc: core: Move public functions from core.h to private headers
A significant amount of functions are available through the public mmc
core.h header file. Let's slim down this public mmc interface, as to
prevent users from abusing it, by moving some of the functions to private
mmc header files.
This change concentrates on moving the functions into private mmc headers,
following changes may continue with additional clean-ups, as an example
some functions can be turned into static.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
55244c5659b5e73a969b285a2e763223d8aab979)
Conflicts:
include/linux/mmc/core.h
Ulf Hansson [Fri, 13 Jan 2017 13:14:07 +0000 (14:14 +0100)]
mmc: core: First step in cleaning up private mmc header files
This is the first step in cleaning up the private mmc header files. In this
change we makes sure each header file builds standalone, as that helps to
resolve dependencies.
While changing this, it also seems reasonable to stop including other
headers from inside a header itself which it don't depend upon.
Additionally, in some cases such dependencies are better resolved by
forward declaring the needed struct.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
066185d690631478b16045d152b163a51a5e4847)
Ulf Hansson [Fri, 13 Jan 2017 13:14:06 +0000 (14:14 +0100)]
mmc: core: First step in cleaning up public mmc header files
This is the first step in cleaning up the public mmc header files. In this
change we makes sure each header file builds standalone, as that helps to
resolve dependencies.
While changing this, it also seems reasonable to stop including other
headers from inside a header itself which it don't depend upon.
Additionally, in some cases such dependencies are better resolved by
forward declaring the needed struct.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
(cherry picked from commit
8da007348bf52a91e5137d27d7dcd528edbb80ce)
Ulf Hansson [Wed, 11 Jan 2017 11:28:15 +0000 (12:28 +0100)]
mmc: mxcmmc: Include interrupt.h in the platform data header
The mxcmmc platform data header depends on interrupt.h. Don't rely on the
public mmc header host.h to include it, bud instead make that dependency
explicit.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8336bf68b57e1e736be8d4ef1f46a789fe7b9bde)
Shawn Lin [Mon, 9 Jan 2017 08:56:20 +0000 (16:56 +0800)]
mmc: sdio: don't use rocr to check if the card could support UHS mode
Per SDIO Simplified Specification V3, section 3.1.2, A host that
supports UHS-I sets S18R to 1 in the argument of CMD5 to request a
change of the signal voltage to 1.8V. If the card supports UHS-I and
the current signal voltage is 3.3V, S18A is set to 1 in the R4 response.
If the signal voltage is already 1.8V, the card sets S18A to 0 so that
host maintains the current signal voltage. UHS-I is supported in SD mode
and S18A is always 0 in SPI mode.
For the current code, if the signaling voltage is fixed 1.8v, so
the card will set S18A to 0 for rocr and thus we would clear the
R4_18V_PRESENT from ocr, which make core won't try to use uhs mode.
To fix it, we expect sdio_read_cccr would fail if the uhs mode won't
work at all. Note that it's interesting that some sdio cards still
response S18A even the voltage is fixed to 1.8v and the CMD11 will
also accepted and finish enabling UHS mode successfully. I guess this
is why folks didn't notice this problem. Anyway, fix it.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
5fc3d80ef496c3bc3e8c09f056e3586fb681de56)
Shawn Lin [Mon, 9 Jan 2017 08:56:19 +0000 (16:56 +0800)]
mmc: sdio: Factor out retry init card helper function
Add new helper function, mmc_sdio_resend_if_cond, to be
reused when trying to retry the init sequence.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
0eb51a58ad823b2081c69ec1cf165833dd11c450)
Markus Elfring [Sun, 8 Jan 2017 21:10:40 +0000 (22:10 +0100)]
mmc: core: Use kmalloc_array() in mmc_alloc_sg()
* A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kmalloc_array".
This issue was detected by using the Coccinelle software.
* Replace the specification of a data structure by a pointer dereference
to make the corresponding size determination a bit safer according to
the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
63928d4789ebb3f7d35d9261089b3bcc98ae0632)
Markus Elfring [Sun, 8 Jan 2017 20:43:12 +0000 (21:43 +0100)]
mmc: mmc_test: Use kcalloc() in mmc_test_alloc_mem()
* The script "checkpatch.pl" pointed information out like the following.
WARNING: Prefer kcalloc over kzalloc with multiply
Thus fix the affected source code place.
* Replace the specification of a data structure by a pointer dereference
to make the corresponding size determination a bit safer according to
the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
3972a20b51c8bb887d13f5656d6fa93bf3d4fc46)
Markus Elfring [Sun, 8 Jan 2017 20:25:44 +0000 (21:25 +0100)]
mmc: mmc_test: Improve a size determination in five functions
Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
554d7c540ea0d30e03674a24d139dd8b5c1646c5)
Markus Elfring [Sun, 8 Jan 2017 19:56:48 +0000 (20:56 +0100)]
mmc: mmc_test: Combine substrings for 5 messages
The script "checkpatch.pl" pointed information out like the following.
WARNING: quoted string split across lines
Thus fix affected source code places.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
7200449dc6a1f4556ad5da20df031bfbaf42fff5)
Markus Elfring [Sun, 8 Jan 2017 19:25:39 +0000 (20:25 +0100)]
mmc: mmc_test: Add some spaces for better code readability
Use space characters at some source code places according to
the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
fda02ea814f92d11a2400ec583b4d83cbb633ad0)
Markus Elfring [Sun, 8 Jan 2017 18:48:28 +0000 (19:48 +0100)]
mmc: mmc_test: Use seq_puts() in mtf_testlist_show()
The script "checkpatch.pl" pointed information out like the following.
WARNING: Prefer seq_puts to seq_printf
Thus fix the affected source code place.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
dc3a5fe6ec115ee1d9d1c2ee8004c9a5193b2435)
Markus Elfring [Sun, 8 Jan 2017 18:05:37 +0000 (19:05 +0100)]
mmc: mmc_test: Fix a typo in a comment line
Add a missing character in the function description.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
74536bc0834fbfd5ead74beef20f9ba387df6a5a)
Markus Elfring [Sun, 8 Jan 2017 17:44:26 +0000 (18:44 +0100)]
mmc: mmc_test: Use kmalloc_array() in mmc_test_area_init()
* A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kmalloc_array".
This issue was detected by using the Coccinelle software.
* Replace the specification of a data structure by a pointer dereference
to make the corresponding size determination a bit safer according to
the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
457e4f7f668d69bc105b3619c5ff2769506adb89)
yangbo lu [Mon, 26 Dec 2016 09:46:29 +0000 (17:46 +0800)]
mmc: sdhci-esdhc: clean up register definitions
The eSDHC register definitions in header file were messy and confusing.
This patch is to clean up these definitions.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
a6b448884a5f8eed5fec888f918aef26be338912)
Ulf Hansson [Fri, 30 Dec 2016 12:47:23 +0000 (13:47 +0100)]
mmc: host: Include interrupt.h in mmc host drivers that depends on it
An mmc host driver shouldn't rely on interrupt.h being included by another
public mmc header. Instead make that dependency explicit by including
interrupt.h in those host drivers that depends on it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
(cherry picked from commit
b8789ec482bbbf52f62631e25b6c8648fa834efc)
Conflicts:
drivers/mmc/host/davinci_mmc.c
drivers/mmc/host/dw_mmc.h
drivers/mmc/host/meson-gx-mmc.c
Ulf Hansson [Fri, 30 Dec 2016 12:47:22 +0000 (13:47 +0100)]
mmc: sdhci: Include leds.h
Don't rely on host.h to include the leds.h header, but instead include it
explicitly because the driver depends on it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
(cherry picked from commit
210583f47293c3a4a96a7e0d3e10b3210d542656)
Masahiro Yamada [Mon, 19 Dec 2016 11:51:18 +0000 (20:51 +0900)]
mmc: use empty initializer list to zero-clear structures
In the MMC subsystem, we see such initializers that only clears the
first member explicitly.
For example,
struct mmc_request mrq = {NULL};
sets the first member (.sbc) to NULL explicitly. However, this is
an unstable form because we may insert a non-pointer member at the
top of the struct mmc_request in the future. (if we do so, the
compiler will spit warnings.)
So, using a designated initializer is preferred coding style. The
expression above is equivalent to:
struct mmc_request mrq = { .sbc = NULL };
Of course, this does not express our intention. We want to fill
all struct members with zeros. Please note struct members are
implicitly zero-cleared unless otherwise specified in the initializer.
After all, the most reasonable (and stable) form is:
struct mmc_request mrq = {};
Do likewise for mmc_command, mmc_data as well.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
c7836d1593b87cb813c58cf64e08b052ebbe2a78)
Geert Uytterhoeven [Mon, 19 Dec 2016 14:03:45 +0000 (15:03 +0100)]
mmc: block: Replace "goto retry" by a proper do / while loop
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
164b50b353908c79b551b3658e37f29182e2c0b3)
Geert Uytterhoeven [Mon, 19 Dec 2016 14:03:44 +0000 (15:03 +0100)]
mmc: block: Avoid uninitialized warning in mmc_blk_issue_discard_rq()
With gcc-4.1.2:
mmc/core/block.c: In function ‘mmc_blk_issue_discard_rq’:
mmc/core/block.c:1150: warning: ‘arg’ may be used uninitialized in this function
mmc/core/block.c:1150: warning: ‘nr’ may be used uninitialized in this function
mmc/core/block.c:1150: warning: ‘from’ may be used uninitialized in this function
While this is a false positive, it can be avoided easily by jumping over
the checks for "err" that are always false.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8cb6ed17eb30f190f215031844433981644b064d)
Jungseung Lee [Thu, 22 Dec 2016 03:37:34 +0000 (12:37 +0900)]
mmc: core: Export device lifetime information through sysfs
In the eMMC 5.0 version of the spec, several EXT_CSD fields about
device lifetime are added.
- Two types of estimated indications reflected by averaged wear out of memory
- An indication reflected by average reserved blocks
Export the information through sysfs.
Signed-off-by: Jungseung Lee <js07.lee@samsung.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
46bc5c408e4e325efbfff26609c76099979180a7)
Christoph Hellwig [Tue, 31 Jan 2017 15:57:24 +0000 (16:57 +0100)]
mmc: remove pointless request type check in mmc_prep_request
The block layer won't send requests the driver isn't asking for,
so remove this check.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit
261c83c1a9e5b74e41037cc804e8b9ae21623ddd)
Ulf Hansson [Fri, 13 Jan 2017 11:05:03 +0000 (12:05 +0100)]
mmc: core: Restore parts of the polling policy when switch to HS/HS DDR
Regressions for not being able to detect an eMMC HS DDR mode card has been
reported for the sdhci-esdhc-imx driver, but potentially other sdhci
variants may suffer from the similar problem.
The commit
e173f8911f09 ("mmc: core: Update CMD13 polling policy when
switch to HS DDR mode"), is causing the problem. It seems that change moved
one step to far, regarding changing the host's timing before polling for a
busy card.
To fix this, let's move back to the behaviour when the host's timing is
updated after the polling, but before the switch status is fetched and
validated.
In cases when polling with CMD13, we keep validating the switch status at
each attempt. However, to align with the other card busy detections
mechanism, let's fetch and validate the switch status also after the host's
timing is updated.
Reported-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Reported-by: Gary Bisson <gary.bisson@boundarydevices.com>
Fixes:
e173f8911f09 ("mmc: core: Update CMD13 polling policy when switch..")
Cc: Shawn Lin <shawn.lin@rock-chips.com>
Cc: Dong Aisheng <aisheng.dong@nxp.com>
Cc: Haibo Chen <haibo.chen@nxp.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
(cherry picked from commit
ee6ff743e3a4b697e8286054667d7e4e1b56510d)
Conflicts:
drivers/mmc/core/mmc_ops.c
Adrian Hunter [Mon, 19 Dec 2016 13:57:34 +0000 (15:57 +0200)]
mmc: core: Further fix thread wake-up
Commit
e0097cf5f2f1 ("mmc: queue: Fix queue thread wake-up") did not go far
enough. mmc_wait_for_data_req_done() still contains some problems and can
be further simplified. First it should not touch
context_info->is_waiting_last_req because that is a wake-up control used by
the owner of the context. Secondly, it should always return when one of its
wake-up conditions is met because, again, that is contolled by the owner of
the context.
While the current block driver does not have an issue, these problems were
exposed during testing of the Software Command Queue patches.
Fixes:
e0097cf5f2f1 ("mmc: queue: Fix queue thread wake-up")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Harjani Ritesh <riteshh@codeaurora.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
15520111500c33a012aeec28ece8c5f2dcbf6b5e)
Adrian Hunter [Mon, 19 Dec 2016 13:33:11 +0000 (15:33 +0200)]
mmc: sdhci: Fix to handle MMC_POWER_UNDEFINED
Since commit
c2c24819b280 ("mmc: core: Don't power off the card when
starting the host"), the power state can still be MMC_POWER_UNDEFINED after
mmc_start_host() is called. That can trigger a warning in SDHCI during
runtime resume as it tries to restore the I/O state. Handle
MMC_POWER_UNDEFINED simply by not updating the I/O state in that case.
Fixes:
c2c24819b280 ("mmc: core: Don't power off the card when starting the host")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
84ec048ba133c2a570273e90622d8fac4930553e)
Conflicts:
drivers/mmc/host/sdhci.c
Ulf Hansson [Thu, 8 Dec 2016 10:23:49 +0000 (11:23 +0100)]
mmc: block: Move files to core
Once upon a time it made sense to keep the mmc block device driver and its
related code, in its own directory called card. Over time, more an more
functions/structures have become shared through generic mmc header files,
between the core and the card directory. In other words, the relationship
between them has become closer.
By sharing functions/structures via generic header files, it becomes easy
for outside users to abuse them. In a way to avoid that from happen, let's
move the files from card directory into the core directory, as it enables
us to move definitions of functions/structures into mmc core specific
header files.
Note, this is only the first step in providing a cleaner mmc interface for
outside users. Following changes will do the actual cleanup, as that is not
part of this change.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
(cherry picked from commit
f397c8d80a5e413984bd9ccdf4161c7156b365ce)
Masahiro Yamada [Thu, 8 Dec 2016 12:50:54 +0000 (21:50 +0900)]
mmc: sdhci: export sdhci_execute_tuning()
Some SDHCI-compat controllers support not only SD, but also eMMC,
but they use different commands for tuning: CMD19 for SD, CMD21 for
eMMC.
Due to the difference of the underlying mechanism, some controllers
(at least, the Cadence IP is the case) provide their own registers
for the eMMC tuning.
This commit will be useful when we want to override .execute_tuning
callback (for eMMC HS200 tuning), but still let it fall back to
sdhci_execute_tuning() for SD timing.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
85a882c2e91d3655927ecdc1db823d1420a65b8f)
Adrian Hunter [Fri, 2 Dec 2016 13:14:27 +0000 (15:14 +0200)]
mmc: sdhci: Tidy tuning loop
Tidy the tuning loop by moving it to a separate function and making it a
for-loop.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
6b11e70bb72c5bfbd7d1544518d26d4b1100aae1)
Conflicts:
drivers/mmc/host/sdhci.c
Adrian Hunter [Fri, 2 Dec 2016 13:14:26 +0000 (15:14 +0200)]
mmc: sdhci: Simplify tuning block size logic
There are only 2 possible block sizes, so simplify 2 if-statements into 1.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
85336109c0b272d8d0b4509872e1247d948ddfa9)
Adrian Hunter [Fri, 2 Dec 2016 13:59:23 +0000 (15:59 +0200)]
mmc: sdhci: Factor out tuning helper functions
Factor out some functions to tidy up the code in sdhci_execute_tuning.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
da4bc4f2851e3c46076929a8c9a99ee3e076cf1f)
Adrian Hunter [Fri, 2 Dec 2016 13:14:24 +0000 (15:14 +0200)]
mmc: sdhci: Use mmc_abort_tuning()
Use mmc_abort_tuning() instead of open-coding the stop command.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
d0c3ab59105dd0192fc9bc3a578584a5b1c01dd0)
Adrian Hunter [Fri, 2 Dec 2016 13:14:23 +0000 (15:14 +0200)]
mmc: mmc: Introduce mmc_abort_tuning()
If a tuning command times out, the card could still be processing it, which
will cause problems for recovery. The eMMC specification says that CMD12
can be used to stop CMD21, so add a function that does that.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
e711f0309109701cb422aab44ace4ea0dccb89ea)
Adrian Hunter [Fri, 2 Dec 2016 13:14:22 +0000 (15:14 +0200)]
mmc: sdhci: Always allow tuning to fall back to fixed sampling
SDHCI falls back to fixed sampling if there is an error during tuning.
However it also reports an error unless there is periodic re-tuning.
That is not the best option because:
a) there is a reasonable chance that fixed sampling will work, especially
at room temperature.
b) re-tuning will be done again anyway if there are CRC errors.
Change to return no error always when falling back to fixed sampling.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
0760c355525c08dd598e86edb2a310688ac8af4c)
Adrian Hunter [Fri, 2 Dec 2016 13:14:21 +0000 (15:14 +0200)]
mmc: sdhci: Fix tuning reset after exhausting the maximum number of loops
If the driver has exhausted the maximum number of tuning loops, then fixed
sampling is used. To do that both SDHCI_CTRL_TUNED_CLK and
SDHCI_CTRL_EXEC_TUNING must be reset to 0, but only SDHCI_CTRL_TUNED_CLK
was being reset. Reset SDHCI_CTRL_EXEC_TUNING to 0 also.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
5ef5203b95c5090ba40e30ee8eedc5a937fc2898)
Adrian Hunter [Fri, 2 Dec 2016 11:16:35 +0000 (13:16 +0200)]
mmc: mmc: Relax checking for switch errors after HS200 switch
The JEDEC specification indicates CMD13 can be used after a HS200 switch
to check for errors. However in practice some boards experience CRC errors
in the CMD13 response. Consequently, for HS200, CRC errors are not a
reliable way to know the switch failed. If there really is a problem, we
would expect tuning will fail and the result ends up the same. So change
the error condition to ignore CRC errors in that case.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
ef3d232245ab7a1bf361c52449e612e4c8b7c5ab)
Shawn Lin [Wed, 2 Nov 2016 07:26:57 +0000 (15:26 +0800)]
mmc: mmc_test: remove BUG_ONs and deploy error handling
It is unnecessary to panic the kernel when testing mmc. Instead,
cast a warning for folkz to debug and return the error code to
the caller to indicate the failure of this test should be enough.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
f28ef5617254a946c1a8576dc3f243347b143794)
Shawn Lin [Wed, 2 Nov 2016 07:26:49 +0000 (15:26 +0800)]
mmc: queue: remove BUG_ON for bounce_sg
bounce_sg for mqrq_cur and mqrq_pre are proper
allocated when initializing the queue and will not
be freed before explicitly cleaning the queue. So from
the code itself it should be quite confident to remove
this check. If that BUG_ON take effects, it is mostly
likely the memory is randomly oopsing.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8508cb9868015cad4f10d818f32f4030c75e88e0)
Shawn Lin [Wed, 2 Nov 2016 07:26:25 +0000 (15:26 +0800)]
mmc: sdio_uart: remove meaningless BUG_ON
The code seems quite simple to maintain the sdio_uart_table,
and the insert/remove port from the table are symmetric. If
the BUG_ON occurs, which means serial_core modify the index
or mess up the port sequence anyway.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8664dccf3adb1ca3bddf5ddd11e44a0c033cad63)
Shawn Lin [Wed, 2 Nov 2016 07:26:16 +0000 (15:26 +0800)]
mmc: core: remove BUG_ONs from core.c
BUG_ONs doesn't help anything except for stop the system from
running. If it occurs, it implies we should deploy proper error
handling for that. So this patch is gonna discard these meaningless
BUG_ONs and deploy error handling if needed.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
6ff897ff5c62cd0454af39734408fcec8c4cf3f3)
Shawn Lin [Wed, 2 Nov 2016 07:25:48 +0000 (15:25 +0800)]
mmc: core: remove BUG_ONs from sd
BUG_ONs doesn't help anything except for stop the system from
running. If it occurs, it implies we should deploy proper error
handling for that. So this patch is gonna discard these meaningless
BUG_ONs and deploy error handling if needed.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
349583d66620a7d3eda760c82119ab7a8c253272)
Shawn Lin [Wed, 2 Nov 2016 07:25:33 +0000 (15:25 +0800)]
mmc: core: remove BUG_ONs from mmc
BUG_ONs doesn't help anything except for stop the system from
running. If it occurs, it implies we should deploy proper error
handling for that. So this patch is gonna discard these meaningless
BUG_ONs and deploy error handling if needed.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
8cce3ecc535daf91c6f5c895684195932a949be1)
Shawn Lin [Wed, 2 Nov 2016 07:24:39 +0000 (15:24 +0800)]
mmc: debugfs: remove BUG_ON from mmc_ext_csd_open
Return error value for file_operations callback instead
of triggering BUG_ON which is meaningless. Personally I
don't believe n != EXT_CSD_STR_LEN could happen. Anyway,
propagate the error to the caller.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
a48ee3e65a9e7395e8bab86728fcdc81c30a89ca)
Shawn Lin [Wed, 2 Nov 2016 07:24:00 +0000 (15:24 +0800)]
mmc: core: remove BUG_ONs from sdio
BUG_ONs doesn't help anything except for stop the system from
running. If it occurs, it implies we should deploy proper error
handling for that. So this patch is gonna discard these meaningless
BUG_ONs and deploy error handling if needed.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
5df0e8231f9518ee5ca3f58a0777556dd03addd6)
Adrian Hunter [Tue, 29 Nov 2016 10:09:16 +0000 (12:09 +0200)]
mmc: mmc: Add Command Queue definitions
Add definitions relating to 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>
(cherry picked from commit
925ff3a7a334b3fe968ae15f07d22df21addad26)
Adrian Hunter [Tue, 29 Nov 2016 10:09:15 +0000 (12:09 +0200)]
mmc: queue: Introduce queue depth and use it to allocate and free
Add a mmc_queue member to record the size of the queue, which currently
supports 2 requests on-the-go at a time. Instead of allocating resources
for 2 slots in the queue, allow for an arbitrary number.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
c5bda0ca6fab8e040c8ea3c71fdd16deee0f132f)
Adrian Hunter [Tue, 29 Nov 2016 10:09:14 +0000 (12:09 +0200)]
mmc: queue: Factor out mmc_queue_reqs_free_bufs()
In preparation for supporting a queue of requests, factor out
mmc_queue_reqs_free_bufs().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
c09949cff5eb408c30f154207ebdc706d94fe1f3)
Adrian Hunter [Tue, 29 Nov 2016 10:09:13 +0000 (12:09 +0200)]
mmc: queue: Factor out mmc_queue_alloc_sgs()
In preparation for supporting a queue of requests, factor out
mmc_queue_alloc_sgs().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
64e29e42a61b8b531eb77f363ddb8e507dfd35ed)
Adrian Hunter [Tue, 29 Nov 2016 10:09:12 +0000 (12:09 +0200)]
mmc: queue: Factor out mmc_queue_alloc_bounce_sgs()
In preparation for supporting a queue of requests, factor out
mmc_queue_alloc_bounce_sgs().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org>
[Ulf: Fixed compiler warning]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
f2b8b522cf643baa367b6834a49ff3e12cfa9136)
Adrian Hunter [Tue, 29 Nov 2016 10:09:11 +0000 (12:09 +0200)]
mmc: queue: Factor out mmc_queue_alloc_bounce_bufs()
In preparation for supporting a queue of requests, factor out
mmc_queue_alloc_bounce_bufs().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org>
[Ulf: Fixed compiler warning]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
c853982ece93da10e508a5dab621478623deb324)
Adrian Hunter [Tue, 29 Nov 2016 10:09:10 +0000 (12:09 +0200)]
mmc: queue: Fix queue thread wake-up
The only time the driver sleeps expecting to be woken upon the arrival of
a new request, is when the dispatch queue is empty. The only time that it
is known whether the dispatch queue is empty is after NULL is returned
from blk_fetch_request() while under the queue lock.
Recognizing those facts, simplify the synchronization between the queue
thread and the request function. A couple of flags tell the request
function what to do, and the queue lock and barriers associated with
wake-ups ensure synchronization.
The result is simpler and allows the removal of the context_info lock.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Harjani Ritesh <riteshh@codeaurora.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit
e0097cf5f2f1b7b8a594beaa32a604776d3ca6ce)