kernel/linux.git/drivers/mmc/core/debugfs.c, branch linux-4.20.y

mmc: Export host capabilities to debugfs.

2018-03-22T09:36:27+00:00

This patch exports the host capabilities to debugfs Signed-off-by: Abbas Raza Signed-off-by: Andrew Gabbasov [Harish: Added caps2, moved creation to mmc_add_host_debugfs] Signed-off-by: Harish Jenny K N Reviewed-by: Shawn Lin Signed-off-by: Ulf Hansson

mmc: core: Re-use DEFINE_SHOW_ATTRIBUTE() macro

2018-03-05T12:04:28+00:00

...instead of open coding file operations followed by custom ->open() callbacks per each attribute. Signed-off-by: Andy Shevchenko Reviewed-by: Avri Altman Reviewed-by: Linus Walleij Reviewed-by: Shawn Lin Signed-off-by: Ulf Hansson

mmc: block: Ensure that debugfs files are removed

2017-11-23T13:39:13+00:00

The card is not necessarily being removed, but the debugfs files must be removed when the driver is removed, otherwise they will continue to exist after unbinding the card from the driver. e.g. # echo "mmc1:0001" > /sys/bus/mmc/drivers/mmcblk/unbind # cat /sys/kernel/debug/mmc1/mmc1\:0001/ext_csd [ 173.634584] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050 [ 173.643356] IP: mmc_ext_csd_open+0x5e/0x170 A complication is that the debugfs_root may have already been removed, so check for that too. Fixes: 627c3ccfb46a ("mmc: debugfs: Move block debugfs into block module") Signed-off-by: Adrian Hunter Reviewed-by: Linus Walleij Cc: stable@vger.kernel.org # 4.14+ Signed-off-by: Ulf Hansson

mmc: debugfs: Move block debugfs into block module

2017-08-30T13:03:39+00:00

If we don't have the block layer enabled, we do not present card status and extcsd in the debugfs. Debugfs is not ABI, and maintaining files of no relevance for non-block devices comes at a high maintenance cost if we shall support it with the block layer compiled out. The debugfs entries suffer from all the same starvation issues as the other userspace things, under e.g. a heavy dd operation. The expected number of debugfs users utilizing these two debugfs files is already low as there is an ioctl() to get the same information using the mmc-tools, and of these few users the expected number of people using it on SDIO or combo cards are expected to be zero. It is therefore logical to move this over to the block layer when it is enabled, using the new custom requests and issue it using the block request queue. On the other hand it moves some debugfs code from debugfs.c and into block.c. Tested during heavy dd load by cat:in the status file. Signed-off-by: Linus Walleij Signed-off-by: Ulf Hansson

mmc: core: Move public functions from host.h to private headers

2017-02-13T12:20:25+00:00

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 Reviewed-by: Linus Walleij Reviewed-by: Shawn Lin

mmc: core: Move public functions from card.h to private headers

2017-02-13T12:20:24+00:00

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 Reviewed-by: Linus Walleij Reviewed-by: Shawn Lin

mmc: debugfs: remove BUG_ON from mmc_ext_csd_open

2016-12-05T09:31:09+00:00

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 Signed-off-by: Ulf Hansson

mmc: debugfs: add HS400 enhanced strobe description

2016-07-25T08:34:06+00:00

We introduce HS400 with enhanced strobe function, so we need to add it for debug show. Signed-off-by: Shawn Lin Reviewed-by: Douglas Anderson Tested-by: Douglas Anderson Tested-by: Jaehoon Chung Signed-off-by: Ulf Hansson

mmc: debugfs: Add a restriction to mmc debugfs clock setting

2016-02-29T10:02:49+00:00

Clock frequency values written to an mmc host should not be less than the minimum clock frequency which the mmc host supports. Signed-off-by: Yuan Juntao Signed-off-by: Pawel Wodkowski Signed-off-by: Ulf Hansson

mmc: debugfs: correct wrong voltage value

2016-01-19T09:14:22+00:00

Correct the wrong voltage value shown in debugfs for mmc/sd/sdio. Signed-off-by: Chuanxiao Dong Signed-off-by: Pawel Wodkowski Fixes: 42cd95a0603e ("mmc: core: debugfs: Add signal_voltage to ios dump") Signed-off-by: Ulf Hansson