kernel/linux.git/include/linux/mmc/core.h, branch v6.6.132

mmc: core: improve API to make clear that mmc_sw_reset is for cards

2022-04-26T12:05:20+00:00

To make it unambiguous that mmc_sw_reset() is for cards and not for controllers, we make the function argument mmc_card instead of mmc_host. There are no users to convert currently. Suggested-by: Ulf Hansson Signed-off-by: Wolfram Sang Link: https://lore.kernel.org/r/20220408080045.6497-3-wsa+renesas@sang-engineering.com Signed-off-by: Ulf Hansson

mmc: core: improve API to make clear mmc_hw_reset is for cards

2022-04-08T09:00:08+00:00

To make it unambiguous that mmc_hw_reset() is for cards and not for controllers, we make the function argument mmc_card instead of mmc_host. Also, all users are converted. Suggested-by: Ulf Hansson Signed-off-by: Wolfram Sang Acked-by: Kalle Valo Link: https://lore.kernel.org/r/20220408080045.6497-2-wsa+renesas@sang-engineering.com Signed-off-by: Ulf Hansson

mmc: core: Store pointer to bio_crypt_ctx in mmc_request

2021-08-24T08:15:32+00:00

Make 'struct mmc_request' contain a pointer to the request's 'struct bio_crypt_ctx' directly, instead of extracting a 32-bit DUN from it which is a cqhci-crypto specific detail. This keeps the cqhci crypto specific details in the cqhci module, and it makes mmc_core and mmc_block ready for MMC crypto hardware that accepts the DUN and/or key in a way that is more flexible than that which will be specified by the eMMC v5.2 standard. Exynos SoCs are an example of such hardware, as their inline encryption hardware takes keys directly (it has no concept of keyslots) and supports 128-bit DUNs. Note that the 32-bit DUN length specified by the standard is very restrictive, so it is likely that more hardware will support longer DUNs despite it not following the standard. Thus, limiting the scope of the 32-bit DUN assumption to the place that actually needs it is warranted. Signed-off-by: Eric Biggers Link: https://lore.kernel.org/r/20210721154738.3966463-1-ebiggers@kernel.org Signed-off-by: Ulf Hansson

mmc: core: Add basic support for inline encryption

2021-02-01T11:02:33+00:00

In preparation for adding CQHCI crypto engine (inline encryption) support, add the code required to make mmc_core and mmc_block aware of inline encryption. Specifically: - Add a capability flag MMC_CAP2_CRYPTO to struct mmc_host. Drivers will set this if the host and driver support inline encryption. - Embed a blk_keyslot_manager in struct mmc_host. Drivers will initialize this (as a device-managed resource) if the host and driver support inline encryption. mmc_block registers this keyslot manager with the request_queue of any MMC card attached to the host. - Make mmc_block copy the crypto keyslot and crypto data unit number from struct request to struct mmc_request, so that drivers will have access to them. - If the MMC host is reset, reprogram all the keyslots to ensure that the software state stays in sync with the hardware state. Co-developed-by: Satya Tangirala Signed-off-by: Satya Tangirala Acked-by: Adrian Hunter Reviewed-by: Satya Tangirala Reviewed-and-tested-by: Peng Zhou Signed-off-by: Eric Biggers Link: https://lore.kernel.org/r/20210126001456.382989-2-ebiggers@kernel.org Signed-off-by: Ulf Hansson

mmc: core: Re-work the code for eMMC sanitize

2020-03-26T13:45:31+00:00

The error path for sanitize operations that completes with -ETIMEDOUT, is tightly coupled with the internal request handling code of the core. More precisely, mmc_wait_for_req_done() checks for specific sanitize errors. This is not only inefficient as it affects all types of requests, but also hackish. Therefore, let's improve the behaviour by moving the error path out of the mmc core. To do that, retuning needs to be held while running the sanitize operation. Moreover, to avoid exporting unnecessary symbols to the mmc block module, let's move the code into the mmc_ops.c file. While updating the actual code, let's also take the opportunity to clean up some of the mess around it. Signed-off-by: Ulf Hansson Link: https://lore.kernel.org/r/20200316152152.15122-1-ulf.hansson@linaro.org

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman

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

2018-05-08T07:33:42+00:00

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: Move mmc_start_areq() declaration

2017-08-30T13:03:53+00:00

mmc_start_areq() is an internal mmc core API. Move the declaration accordingly. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson

mmc: host: Add CQE interface

2017-08-30T13:03:33+00:00

Add CQE host operations, capabilities, and host members. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson

mmc: core: Add members to mmc_request and mmc_data for CQE's

2017-08-30T12:02:01+00:00

Most of the information needed to issue requests to a CQE is already in struct mmc_request and struct mmc_data. Add data block address, some flags, and the task id (tag), and allow for cmd being NULL which it is for CQE tasks. Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson