kernel/linux.git/drivers/mmc/core, branch v6.18.21

rpmb: move rpmb_frame struct and constants to common header

2025-10-13T11:18:03+00:00

Move struct rpmb_frame and RPMB operation constants from MMC block driver to include/linux/rpmb.h for reuse across different RPMB implementations (UFS, NVMe, etc.). Signed-off-by: Bean Huo Reviewed-by: Avri Altman Acked-by: Jens Wiklander Reviewed-by: Bart Van Assche Signed-off-by: Ulf Hansson

Merge tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

2025-10-02T17:16:56+00:00

Pull block updates from Jens Axboe: - NVMe pull request via Keith: - FC target fixes (Daniel) - Authentication fixes and updates (Martin, Chris) - Admin controller handling (Kamaljit) - Target lockdep assertions (Max) - Keep-alive updates for discovery (Alastair) - Suspend quirk (Georg) - MD pull request via Yu: - Add support for a lockless bitmap. A key feature for the new bitmap are that the IO fastpath is lockless. If a user issues lots of write IO to the same bitmap bit in a short time, only the first write has additional overhead to update bitmap bit, no additional overhead for the following writes. By supporting only resync or recover written data, means in the case creating new array or replacing with a new disk, there is no need to do a full disk resync/recovery. - Switch ->getgeo() and ->bios_param() to using struct gendisk rather than struct block_device. - Rust block changes via Andreas. This series adds configuration via configfs and remote completion to the rnull driver. The series also includes a set of changes to the rust block device driver API: a few cleanup patches, and a few features supporting the rnull changes. The series removes the raw buffer formatting logic from `kernel::block` and improves the logic available in `kernel::string` to support the same use as the removed logic. - floppy arch cleanups - Reduce the number of dereferencing needed for ublk commands - Restrict supported sockets for nbd. Mostly done to eliminate a class of issues perpetually reported by syzbot, by using nonsensical socket setups. - A few s390 dasd block fixes - Fix a few issues around atomic writes - Improve DMA interation for integrity requests - Improve how iovecs are treated with regards to O_DIRECT aligment constraints. We used to require each segment to adhere to the constraints, now only the request as a whole needs to. - Clean up and improve p2p support, enabling use of p2p for metadata payloads - Improve locking of request lookup, using SRCU where appropriate - Use page references properly for brd, avoiding very long RCU sections - Fix ordering of recursively submitted IOs - Clean up and improve updating nr_requests for a live device - Various fixes and cleanups * tag 'for-6.18/block-20250929' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (164 commits) s390/dasd: enforce dma_alignment to ensure proper buffer validation s390/dasd: Return BLK_STS_INVAL for EINVAL from do_dasd_request ublk: remove redundant zone op check in ublk_setup_iod() nvme: Use non zero KATO for persistent discovery connections nvmet: add safety check for subsys lock nvme-core: use nvme_is_io_ctrl() for I/O controller check nvme-core: do ioccsz/iorcsz validation only for I/O controllers nvme-core: add method to check for an I/O controller blk-cgroup: fix possible deadlock while configuring policy blk-mq: fix null-ptr-deref in blk_mq_free_tags() from error path blk-mq: Fix more tag iteration function documentation selftests: ublk: fix behavior when fio is not installed ublk: don't access ublk_queue in ublk_unmap_io() ublk: pass ublk_io to __ublk_complete_rq() ublk: don't access ublk_queue in ublk_need_complete_req() ublk: don't access ublk_queue in ublk_check_commit_and_fetch() ublk: don't pass ublk_queue to ublk_fetch() ublk: don't access ublk_queue in ublk_config_io_buf() ublk: don't access ublk_queue in ublk_check_fetch_buf() ublk: pass q_id and tag to __ublk_check_and_get_req() ...

mmc: core: Improve RPMB frame handling code

2025-09-12T13:09:53+00:00

Introduce RPMB_FRAME_SIZE, CHECK_SIZE_NEQ(), and CHECK_SIZE_ALIGNED() macros to replace repetitive sizeof(struct rpmb_frame) checks in mmc_route_rpmb_frames(). Signed-off-by: Bean Huo Reviewed-by: Avri Altman Signed-off-by: Ulf Hansson

mmc: core: Fix variable shadowing in mmc_route_rpmb_frames()

2025-09-12T13:09:53+00:00

Rename the inner 'frm' variable to 'resp_frm' in the write path of mmc_route_rpmb_frames() to avoid shadowing the outer 'frm' variable. The function declares 'frm' at function scope pointing to the request frame, but then redeclares another 'frm' variable inside the write block pointing to the response frame. This shadowing makes the code confusing and error-prone. Using 'resp_frm' for the response frame makes the distinction clear and improves code readability. Fixes: 7852028a35f0 ("mmc: block: register RPMB partition with the RPMB subsystem") Reviewed-by: Avri Altman Reviewed-by: Jens Wiklander Signed-off-by: Bean Huo Signed-off-by: Ulf Hansson

mmc: core: Parse and use the new max-sd-hs-hz DT property

2025-09-12T12:49:36+00:00

Introduce a new device tree flag to cap the maximum High-Speed (HS) mode frequency for SD cards, accommodating board-specific electrical limitations which cannot support the default 50Mhz HS frequency and others. Signed-off-by: Sarthak Garg Signed-off-by: Ulf Hansson

mmc: sdio: Drop dev_pm_domain_detach() call

2025-08-27T11:32:58+00:00

Starting with commit f99508074e78 ("PM: domains: Detach on device_unbind_cleanup()"), there is no longer a need to call dev_pm_domain_detach() in the bus remove function. The device_unbind_cleanup() function now handles this to avoid invoking devres cleanup handlers while the PM domain is powered off, which could otherwise lead to failures as described in the above-mentioned commit. Drop the explicit dev_pm_domain_detach() call and rely instead on the flags passed to dev_pm_domain_attach() to power off the domain. Signed-off-by: Claudiu Beznea Link: https://lore.kernel.org/r/20250827101236.927313-1-claudiu.beznea.uj@bp.renesas.com Signed-off-by: Ulf Hansson

mmc: core: add undervoltage handler for MMC/eMMC devices

2025-08-22T10:09:22+00:00

Add infrastructure to handle regulator undervoltage events for MMC/eMMC cards. When an undervoltage is detected, the new handler performs a controlled emergency suspend using a short power-off notification, skipping the cache flush to maximize the chance of a safe shutdown. After the operation, the card is marked as removed to prevent further I/O and possible data corruption. This is implemented by introducing MMC_POWEROFF_UNDERVOLTAGE to the mmc_poweroff_type enum and refactoring the suspend logic into an internal __mmc_suspend() helper that allows the caller to skip the cache flush if required. The undervoltage handler is registered as a bus operation and invoked from the core undervoltage path. If power-off notification is not supported by the card, the handler falls back to sleep or deselecting the card. Additionally, update the shutdown path to avoid redundant shutdown steps if the card is already removed Signed-off-by: Oleksij Rempel Link: https://lore.kernel.org/r/20250821130751.2089587-3-o.rempel@pengutronix.de Signed-off-by: Ulf Hansson

mmc: core: Add infrastructure for undervoltage handling

2025-08-22T10:08:07+00:00

Implement the core infrastructure to allow MMC bus types to handle REGULATOR_EVENT_UNDER_VOLTAGE events from power regulators. This is primarily aimed at allowing devices like eMMC to perform an emergency shutdown to prevent data corruption when a power failure is imminent. This patch introduces: - A new 'handle_undervoltage' function pointer to 'struct mmc_bus_ops'. Bus drivers (e.g., for eMMC) can implement this to define their emergency procedures. - A workqueue ('uv_work') in 'struct mmc_supply' to handle the event asynchronously in a high-priority context. - A new function 'mmc_handle_undervoltage()' which is called from the workqueue. It stops the host queue to prevent races with card removal, checks for the bus op, and invokes the handler. - Functions to register and unregister the regulator notifier, intended to be called by bus drivers like 'mmc_attach_mmc' when a compatible card is detected. The notifier is only registered for the main vmmc supply, as undervoltage handling for vqmmc or vqmmc2 is not required at this time. Signed-off-by: Oleksij Rempel Link: https://lore.kernel.org/r/20250821130751.2089587-2-o.rempel@pengutronix.de Signed-off-by: Ulf Hansson

mmc: core: add mmc_read_tuning

2025-08-19T12:34:15+00:00

Provide a function to the MMC hosts to read some blocks of data as part of their tuning. This function only returns the status of the read operation, not the data read. Signed-off-by: Benoît Monin Link: https://lore.kernel.org/r/20250818-mobileye-emmc-for-upstream-4-v4-5-34ecb3995e96@bootlin.com Signed-off-by: Ulf Hansson

mmc: block: use mmc_card cmd23 helpers

2025-08-19T12:34:15+00:00

Use the dedicated helpers for CMD23 card support. Signed-off-by: Benoît Monin Link: https://lore.kernel.org/r/20250818-mobileye-emmc-for-upstream-4-v4-4-34ecb3995e96@bootlin.com Signed-off-by: Ulf Hansson