kernel.git/drivers/mmc/core/core.h, branch linux-4.19.y

mmc: block: Issue a cache flush only when it's enabled

2021-05-22T08:59:13Z

commit 97fce126e279690105ee15be652b465fd96f9997 upstream. In command queueing mode, the cache isn't flushed via the mmc_flush_cache() function, but instead by issuing a CMDQ_TASK_MGMT (CMD48) with a FLUSH_CACHE opcode. In this path, we need to check if cache has been enabled, before deciding to flush the cache, along the lines of what's being done in mmc_flush_cache(). To fix this problem, let's add a new bus ops callback ->cache_enabled() and implement it for the mmc bus type. In this way, the mmc block device driver can call it to know whether cache flushing should be done. Fixes: 1e8e55b67030 (mmc: block: Add CQE support) Cc: stable@vger.kernel.org Reported-by: Brendan Peter Signed-off-by: Avri Altman Tested-by: Brendan Peter Acked-by: Adrian Hunter Link: https://lore.kernel.org/r/20210425060207.2591-2-avri.altman@wdc.com Link: https://lore.kernel.org/r/20210425060207.2591-3-avri.altman@wdc.com [Ulf: Squashed the two patches and made some minor updates] Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman

mmc: core: Drop the unused mmc_power_save|restore_host()

2018-07-16T09:21:45Z

The last user of mmc_power_save|restore_host() APIs is gone, hence let's drop them. Drop also the corresponding bus_ops callback, ->power_save|restore() as those becomes redundant. Cc: Tony Lindgren Cc: Eyal Reizer Signed-off-by: Ulf Hansson

mmc: core: Share internal function to set initial signal voltage

2018-05-08T07:33:50Z

Move the corresponding code for setting the initial signal voltage, from mmc_power_up() into a new function, mmc_set_initial_signal_voltage(). Make the function internally available to the mmc core, as to allow the following changes to make use of it. Signed-off-by: Ulf Hansson Tested-by: Quentin Schulz Reviewed-by: Shawn Lin

mmc: core: Export a function mmc_sw_reset() to allow soft reset of cards

2018-05-08T07:33:42Z

It's rather common that a firmware is loaded into an SDIO func device memory, by the corresponding SDIO func driver during ->probe() time. However, to actually start running the new firmware, sometimes a soft reset (no power cycle) and a re-initialization of the card is needed. This is for example the case with the Espressif ESP8089 WiFi chips, when connected to an SDIO interface. To cope with this scenario, let's add a new exported function, mmc_sw_reset(), which may be called when a soft reset and re-initialization of the card are needed. The mmc_sw_reset() is implemented on top of a new bus ops callback, similar to how the mmc_hw_reset() has been implemented. Signed-off-by: Ulf Hansson Tested-by: Quentin Schulz Reviewed-by: Shawn Lin

mmc: core: Rename ->reset() bus ops to ->hw_reset()

2018-05-08T07:33:29Z

The bus ops ->reset() executes a full HW reset of the card, as the calling function mmc_hw_reset() also indicates by its name. Let's convert to follow the similar names, for both the bus ops callback and for the corresponding bus ops functions, as to clarify the purpose of code. Signed-off-by: Ulf Hansson Tested-by: Quentin Schulz Reviewed-by: Shawn Lin

mmc: core: Remove code no longer needed after the switch to blk-mq

2017-12-11T12:05:58Z

Remove code no longer needed after the switch to blk-mq. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Tested-by: Linus Walleij Signed-off-by: Ulf Hansson

mmc: core: Remove option not to use blk-mq

2017-12-11T11:55:02Z

Remove config option MMC_MQ_DEFAULT and parameter mmc_use_blk_mq, so that blk-mq must be used always. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Tested-by: Linus Walleij Signed-off-by: Ulf Hansson

mmc: core: Add parameter use_blk_mq

2017-12-11T11:44:33Z

Until mmc has blk-mq support fully implemented and tested, add a parameter use_blk_mq, set to true if config option MMC_MQ_DEFAULT is selected, which it is by default. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Signed-off-by: Ulf Hansson Tested-by: Linus Walleij

mmc: core: Make mmc_pre_req() and mmc_post_req() available

2017-12-11T11:44:32Z

Make mmc_pre_req() and mmc_post_req() available to the card drivers. Later patches will make use of this. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Signed-off-by: Ulf Hansson Tested-by: Linus Walleij

mmc: core: use usleep_range rather than HZ magic in mmc_delay()

2017-12-11T11:44:29Z

Documentation/timers/timers-howto.txt recommends to use usleep_range for delays 1-20ms. Let's adhere to it. No need for messing with HZ and still do busy looping these days. Signed-off-by: Wolfram Sang Signed-off-by: Ulf Hansson