blackbird-obmc-linux/include/linux/mmc, branch dev-5.0-raptor-04-16-2019

mmc: block: handle complete_work on separate workqueue

2019-02-08T11:24:17+00:00

The kblockd workqueue is created with the WQ_MEM_RECLAIM flag set. This generates a rescuer thread for that queue that will trigger when the CPU is under heavy load and collect the uncompleted work. In the case of mmc, this creates the possibility of a deadlock when there are multiple partitions on the device as other blk-mq work is also run on the same queue. For example: - worker 0 claims the mmc host to work on partition 1 - worker 1 attempts to claim the host for partition 2 but has to wait for worker 0 to finish - worker 0 schedules complete_work to release the host - rescuer thread is triggered after time-out and collects the dangling work - rescuer thread attempts to complete the work in order starting with claim host - the task to release host is now blocked by a task to claim it and will never be called The above results in multiple hung tasks that lead to failures to mount partitions. Handling complete_work on a separate workqueue avoids this by keeping the work completion tasks separate from the other blk-mq work. This allows the host to be released without getting blocked by other tasks attempting to claim the host. Signed-off-by: Zachary Hays Fixes: 81196976ed94 ("mmc: block: Add blk-mq support") Cc: Signed-off-by: Ulf Hansson

Merge tag 'mmc-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

2018-12-29T00:52:18+00:00

Pull MMC updates from Ulf Hansson: "This time, this pull request contains changes crossing subsystems and archs/platforms, which is mainly because of a bigger modernization of moving from legacy GPIO to GPIO descriptors for MMC (by Linus Walleij). Additionally, once again, I am funneling changes to drivers/misc/cardreader/* and drivers/memstick/* through my MMC tree, mostly due to that we lack a maintainer for these. Summary: MMC core: - Cleanup BKOPS support - Introduce MMC_CAP_SYNC_RUNTIME_PM - slot-gpio: Delete legacy slot GPIO handling MMC host: - alcor: Add new mmc host driver for Alcor Micro PCI based cardreader - bcm2835: Several improvements to better recover from errors - jz4740: Rework and fixup pre|post_req support - mediatek: Add support for SDIO IRQs - meson-gx: Improve clock phase management - meson-gx: Stop descriptor on errors - mmci: Complete the sbc error path by sending a stop command - renesas_sdhi/tmio: Fixup reset/resume operations - renesas_sdhi: Add support for r8a774c0 and R7S9210 - renesas_sdhi: Whitelist R8A77990 SDHI - renesas_sdhi: Fixup eMMC HS400 compatibility issues for H3 and M3-W - rtsx_usb_sdmmc: Re-work card detection/removal support - rtsx_usb_sdmmc: Re-work runtime PM support - sdhci: Fix timeout loops for some variant drivers - sdhci: Improve support for error handling due to failing commands - sdhci-acpi/pci: Disable LED control for Intel BYT-based controllers - sdhci_am654: Add new SDHCI variant driver to support TI's AM654 SOCs - sdhci-of-esdhc: Add support for eMMC HS400 mode - sdhci-omap: Fixup reset support - sdhci-omap: Workaround errata regarding SDR104/HS200 tuning failures - sdhci-msm: Fixup sporadic write transfers issues for SDR104/HS200 - sdhci-msm: Fixup dynamical clock gating issues - various: Complete converting all hosts into using slot GPIO descriptors Other: - Move GPIO mmc platform data for mips/sh/arm to GPIO descriptors - Add new Alcor Micro cardreader PCI driver - Support runtime power management for memstick rtsx_usb_ms driver - Use USB remote wakeups for card detection for rtsx_usb misc driver" * tag 'mmc-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (99 commits) mmc: mediatek: Add MMC_CAP_SDIO_IRQ support mmc: renesas_sdhi_internal_dmac: Whitelist r8a774c0 dt-bindings: mmc: renesas_sdhi: Add r8a774c0 support mmc: core: Cleanup BKOPS support mmc: core: Drop redundant check in mmc_send_hpi_cmd() mmc: sdhci-omap: Workaround errata regarding SDR104/HS200 tuning failures (i929) dt-bindings: sdhci-omap: Add note for cpu_thermal mmc: sdhci-acpi: Disable LED control for Intel BYT-based controllers mmc: sdhci-pci: Disable LED control for Intel BYT-based controllers mmc: sdhci: Add quirk to disable LED control mmc: mmci: add variant property to set command stop bit misc: alcor_pci: fix spelling mistake "invailid" -> "invalid" mmc: meson-gx: add signal resampling mmc: meson-gx: align default phase on soc vendor tree mmc: meson-gx: remove useless lock mmc: meson-gx: make sure the descriptor is stopped on errors mmc: sdhci_am654: Add Initial Support for AM654 SDHCI driver dt-bindings: mmc: sdhci-of-arasan: Add deprecated message for AM65 dt-bindings: mmc: sdhci-am654: Document bindings for the host controllers on TI's AM654 SOCs mmc: sdhci-msm: avoid unused function warning ...

mmc: core: Introduce MMC_CAP_SYNC_RUNTIME_PM

2018-12-17T07:26:24+00:00

To allow mmc host drivers to inform the mmc core about rather using pm_runtime_put_sync_suspend() instead of pm_runtime_put_autosuspend(), let's introduce MMC_CAP_SYNC_RUNTIME_PM. This is especially useful for those mmc host drivers that don't benefit from using the runtime PM autosuspend feature. Typically this is those that relies on parent devices to power the card via runtime PM, like some USB host drivers for example. Signed-off-by: Ulf Hansson Tested-by: Kai-Heng Feng Tested-by: Oleksandr Natalenko

mmc: slot-gpio: Delete legacy GPIO handling

2018-12-17T07:26:24+00:00

All host drivers are converted to look up GPIO descriptors from device tree, ACPI or machine descriptor tables, so now we can delete the legacy GPIO handling using hardcoded GPIO numbers from the kernel. Signed-off-by: Linus Walleij Signed-off-by: Ulf Hansson

mmc: core: Add ->hs400_prepare_ddr() callback

2018-12-17T07:26:24+00:00

Some eMMC controllers need specific settings for HS400 mode before the speed mode can be switched to DDR mode, during the HS400 initialization sequence. For that reason, let's introduce a new host callback, ->hs400_prepare_ddr() and invoked it just before switching to DDR mode. Signed-off-by: Yinbo Zhu Signed-off-by: Ulf Hansson

brcmfmac: add support for CYW43012 SDIO chipset

2018-12-13T14:57:17+00:00

CYW43012 is a 1x1 802.11a/b/g/n Dual-Band HT20, 256-QAM/Turbo QAM. It is an Ultra Low Power WLAN+BT combo chip. Reviewed-by: Arend van Spriel Signed-off-by: Chi-Hsien Lin Signed-off-by: Praveen Babu C Signed-off-by: Kalle Valo

mmc: core: add helper to see if a host is doing a retune

2018-10-08T09:40:43+00:00

Add a helper to allow host drivers checking if a retune is in progress. Signed-off-by: Niklas Söderlund Reviewed-by: Wolfram Sang Tested-by: Wolfram Sang Signed-off-by: Ulf Hansson

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

2018-07-16T09:21:45+00:00

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: more fine-grained hooks for HS400 tuning

2018-07-16T09:21:45+00:00

This adds two new HS400 tuning operations: * hs400_downgrade * hs400_complete These supplement the existing HS400 operation: * prepare_hs400_tuning This is motivated by a requirement of Renesas SDHI for the following: 1. Disabling SCC before selecting to HS if selection of HS400 has occurred. This can be done in an implementation of prepare_hs400_tuning_downgrade 2. Updating registers after switching to HS400 This can be done in an implementation of complete_hs400_tuning If hs400_downgrade or hs400_complete are not implemented then they are not called. Thus means there should be no affect for existing drivers as none implemt these ops. Signed-off-by: Simon Horman Signed-off-by: Ulf Hansson

mmc: core: Adjust and reuse the macro of R1_STATUS(x)

2018-07-16T09:21:45+00:00

R1_STATUS(x) now is only used by ioctl_rpmb_card_status_poll(), which checks all bits as possible. But according to the spec, bit 17 and bit 18 should be ignored, as well bit 14 which is reserved(must be set to 0) quoting from the spec and these rule apply to all places checking the device status. So change its checking from 0xFFFFE000 to 0xFFF9A000. As a bonus, we reuse it for mmc_do_erase() as well as mmc_switch_status_error(). (1) Currently mmc_switch_status_error() doesn't check bit 25, but it means device is locked but not unlocked by CMD42 prior to any operations which need check busy, which is also not allowed. (2) mmc_do_erase() also forgot to to check bit 15, WP_ERASE_SKIP. The spec says "Only partial address space was erased due to existing write protected blocks.", which obviously means we should fail this I/O. Otherwise, the partial erased data stored in nonvalatile flash violates the data integrity from the view of I/O owner, which probably confuse it when further used. So reusing R1_STATUS for them not only improve the readability but also slove real problems. Signed-off-by: Shawn Lin Signed-off-by: Ulf Hansson