diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2017-08-20 23:39:08 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-08-30 15:03:39 +0200 |
| commit | 627c3ccfb46ada2583eac434127ad5d75e1ac33c (patch) | |
| tree | 0b47d6c685823ff30e76fc50a4f8cf43b5125307 /drivers/mmc/core/queue.h | |
| parent | 1bee324a5627ab05ff9899709a613b8739813eda (diff) | |
mmc: debugfs: Move block debugfs into block module
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 <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/queue.h')
| -rw-r--r-- | drivers/mmc/core/queue.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/core/queue.h b/drivers/mmc/core/queue.h index cf26a15a64bf..04fc89360a7a 100644 --- a/drivers/mmc/core/queue.h +++ b/drivers/mmc/core/queue.h @@ -36,10 +36,14 @@ struct mmc_blk_request { * enum mmc_drv_op - enumerates the operations in the mmc_queue_req * @MMC_DRV_OP_IOCTL: ioctl operation * @MMC_DRV_OP_BOOT_WP: write protect boot partitions + * @MMC_DRV_OP_GET_CARD_STATUS: get card status + * @MMC_DRV_OP_GET_EXT_CSD: get the EXT CSD from an eMMC card */ enum mmc_drv_op { MMC_DRV_OP_IOCTL, MMC_DRV_OP_BOOT_WP, + MMC_DRV_OP_GET_CARD_STATUS, + MMC_DRV_OP_GET_EXT_CSD, }; struct mmc_queue_req { |