mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
17ece345a0
- Add support to enable irq wake for slot gpio - Remove MMC_CAP2_HC_ERASE_SZ and make it the default behaviour - Improve R1 response error checks for stop commands - Cleanup and clarify some MMC specific code - Keep card runtime resumed while adding SDIO function devices - Use device_property_read instead of of_property_read in mmc_of_parse() - Move boot partition locking into a driver op to enable proper I/O scheduling - Move multi/single-ioctl() to use block layer to enable proper I/O scheduling - Delete bounce buffer Kconfig option - Improve the eMMC HW reset support provided via the eMMC pwrseq - Add host API to manage SDIO IRQs from a workqueue MMC host: - dw_mmc: Drop support for multiple slots - dw_mmc: Use device_property_read instead of of_property_read - dw_mmc-rockchip: Optional improved tuning to greatly decrease tuning time - dw_mmc: Prevent rpm suspend for SDIO IRQs instead of always for SDIO cards - dw_mmc: Convert to use MMC_CAP2_SDIO_IRQ_NOTHREAD for SDIO IRQs - omap_hsmmc: Convert to mmc regulator APIs to consolidate code - omap_hsmmc: Deprecate "vmmc_aux" in DT and use "vqmmc" instead - tmio: make sure SDIO gets reinitialized after resume - sdhi: add CMD23 support to R-Car Gen2 & Gen3 - tmio: add CMD23 support - sdhi/tmio: Refactor code and rename files to simplify Kconfig options - sdhci-pci: Enable card detect wake for Intel BYT-related SD controllers - sdhci-pci: Add support for Intel CNP - sdhci-esdhc-imx: Remove ENGcm07207 workaround - allow multi block transfers - sdhci-esdhc-imx: Allow all supported prescaler values - sdhci-esdhc-imx: Fix DAT line software reset - sdhci-esdhc: Add SDHCI_QUIRK_32BIT_DMA_ADDR - atmel-mci: Drop AVR32 support -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJZWg0DAAoJEP4mhCVzWIwpyaUQAKpJl/QF5S8E4XaM+GKhhQfz Af4EEGz/ySIJILCEe/A1W+xjTJh/n5jdTUTa197mDr136wp4UP8OUIhjtHHLY92E Q74+piB77wSP0zeGFuDmtY/BRmMsXS2GOK1DlLovsDnThVNe5vZQgdXMTpx8Cfau Bqea566L5EqGL4clOhYgmw3f9QVREDfqw2UahhrvTViSeJ2BZAYgl1lX/5YyX3vX TIIrnSllGGTYTFTB+TLPsH6ac21IDJvagXySyMBUTVfHau9AXo8tDH+WbwfVYLwH OmqmKaI6WT8z7oQy+WNC0P/r9GDRuqWAxdNPPF2PsRE+RbFeZVrBuN5brQxB+gMm IJCA1z7RgLOoiu8tVOj30GXmmMM54NTkD2SLnsWG99Edh7jQ0gCVE8TGnFbgi7jl 8o/N1bB5fOeOMojgoFrTZmRKwIw1nPGFTehfiOzoll1BQy4CRqj7ZM8ji3THz11B GrDMlbv+ocHRW9BVD0PNRUq+AVp5HRzV9actANArhhrHOwG/s9foVdEF+lVpSXty M8PImSDrJ2bNi3aqbdkJ4IFMlAcrHw7m6mBlwTF7uCfRtcacbAy+cxYYCqNh+EOt 5l4qwbU1knH+IEEhgeSL0QQ8QNJcfR9fygifPovLN5Jo2yr0ZBMVD3wKPkZgOIJ2 Lsqoo2URLwa0uE2VU8Nm =zJi3 -----END PGP SIGNATURE----- Merge tag 'mmc-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc Pull MMC updates from Ulf Hansson: "MMC core: - Add support to enable irq wake for slot gpio - Remove MMC_CAP2_HC_ERASE_SZ and make it the default behaviour - Improve R1 response error checks for stop commands - Cleanup and clarify some MMC specific code - Keep card runtime resumed while adding SDIO function devices - Use device_property_read instead of of_property_read in mmc_of_parse() - Move boot partition locking into a driver op to enable proper I/O scheduling - Move multi/single-ioctl() to use block layer to enable proper I/O scheduling - Delete bounce buffer Kconfig option - Improve the eMMC HW reset support provided via the eMMC pwrseq - Add host API to manage SDIO IRQs from a workqueue MMC host: - dw_mmc: Drop support for multiple slots - dw_mmc: Use device_property_read instead of of_property_read - dw_mmc-rockchip: Optional improved tuning to greatly decrease tuning time - dw_mmc: Prevent rpm suspend for SDIO IRQs instead of always for SDIO cards - dw_mmc: Convert to use MMC_CAP2_SDIO_IRQ_NOTHREAD for SDIO IRQs - omap_hsmmc: Convert to mmc regulator APIs to consolidate code - omap_hsmmc: Deprecate "vmmc_aux" in DT and use "vqmmc" instead - tmio: make sure SDIO gets reinitialized after resume - sdhi: add CMD23 support to R-Car Gen2 & Gen3 - tmio: add CMD23 support - sdhi/tmio: Refactor code and rename files to simplify Kconfig options - sdhci-pci: Enable card detect wake for Intel BYT-related SD controllers - sdhci-pci: Add support for Intel CNP - sdhci-esdhc-imx: Remove ENGcm07207 workaround - allow multi block transfers - sdhci-esdhc-imx: Allow all supported prescaler values - sdhci-esdhc-imx: Fix DAT line software reset - sdhci-esdhc: Add SDHCI_QUIRK_32BIT_DMA_ADDR - atmel-mci: Drop AVR32 support" * tag 'mmc-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (86 commits) mmc: dw_mmc: remove the unnecessary slot variable mmc: dw_mmc: use the 'slot' instead of 'cur_slot' mmc: dw_mmc: remove the 'id' arguments about functions relevant to slot mmc: dw_mmc: change the array of slots mmc: dw_mmc: remove the loop about finding slots mmc: dw_mmc: deprecated the "num-slots" property mmc: dw_mmc-rockchip: parse rockchip, desired-num-phases from DT dt-bindings: rockchip-dw-mshc: add optional rockchip, desired-num-phases mmc: renesas-sdhi: improve checkpatch cleanness mmc: tmio: improve checkpatch cleanness mmc: sdhci-pci: Enable card detect wake for Intel BYT-related SD controllers mmc: slot-gpio: Add support to enable irq wake on cd_irq mmc: core: Remove MMC_CAP2_HC_ERASE_SZ mmc: core: for data errors, take response of stop cmd into account mmc: core: check also R1 response for stop commands mmc: core: Clarify code for sending CSD mmc: core: Drop mmc_all_send_cid() and use mmc_send_cxd_native() instead mmc: core: Re-factor code for sending CID mmc: core: Remove redundant code in mmc_send_cid() mmc: core: Make mmc_can_reset() static ...
421 lines
9.8 KiB
C
421 lines
9.8 KiB
C
/*
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* Copyright (C) 2003 Russell King, All Rights Reserved.
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* Copyright 2006-2007 Pierre Ossman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/blkdev.h>
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#include <linux/freezer.h>
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#include <linux/kthread.h>
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#include <linux/scatterlist.h>
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#include <linux/dma-mapping.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/host.h>
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#include "queue.h"
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#include "block.h"
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#include "core.h"
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#include "card.h"
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#define MMC_QUEUE_BOUNCESZ 65536
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/*
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* Prepare a MMC request. This just filters out odd stuff.
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*/
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static int mmc_prep_request(struct request_queue *q, struct request *req)
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{
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struct mmc_queue *mq = q->queuedata;
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if (mq && (mmc_card_removed(mq->card) || mmc_access_rpmb(mq)))
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return BLKPREP_KILL;
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req->rq_flags |= RQF_DONTPREP;
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return BLKPREP_OK;
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}
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static int mmc_queue_thread(void *d)
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{
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struct mmc_queue *mq = d;
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struct request_queue *q = mq->queue;
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struct mmc_context_info *cntx = &mq->card->host->context_info;
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current->flags |= PF_MEMALLOC;
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down(&mq->thread_sem);
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do {
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struct request *req;
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spin_lock_irq(q->queue_lock);
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set_current_state(TASK_INTERRUPTIBLE);
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req = blk_fetch_request(q);
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mq->asleep = false;
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cntx->is_waiting_last_req = false;
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cntx->is_new_req = false;
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if (!req) {
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/*
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* Dispatch queue is empty so set flags for
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* mmc_request_fn() to wake us up.
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*/
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if (mq->qcnt)
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cntx->is_waiting_last_req = true;
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else
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mq->asleep = true;
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}
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spin_unlock_irq(q->queue_lock);
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if (req || mq->qcnt) {
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set_current_state(TASK_RUNNING);
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mmc_blk_issue_rq(mq, req);
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cond_resched();
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} else {
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if (kthread_should_stop()) {
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set_current_state(TASK_RUNNING);
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break;
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}
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up(&mq->thread_sem);
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schedule();
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down(&mq->thread_sem);
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}
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} while (1);
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up(&mq->thread_sem);
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return 0;
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}
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/*
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* Generic MMC request handler. This is called for any queue on a
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* particular host. When the host is not busy, we look for a request
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* on any queue on this host, and attempt to issue it. This may
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* not be the queue we were asked to process.
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*/
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static void mmc_request_fn(struct request_queue *q)
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{
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struct mmc_queue *mq = q->queuedata;
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struct request *req;
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struct mmc_context_info *cntx;
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if (!mq) {
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while ((req = blk_fetch_request(q)) != NULL) {
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req->rq_flags |= RQF_QUIET;
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__blk_end_request_all(req, BLK_STS_IOERR);
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}
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return;
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}
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cntx = &mq->card->host->context_info;
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if (cntx->is_waiting_last_req) {
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cntx->is_new_req = true;
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wake_up_interruptible(&cntx->wait);
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}
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if (mq->asleep)
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wake_up_process(mq->thread);
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}
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static struct scatterlist *mmc_alloc_sg(int sg_len, gfp_t gfp)
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{
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struct scatterlist *sg;
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sg = kmalloc_array(sg_len, sizeof(*sg), gfp);
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if (sg)
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sg_init_table(sg, sg_len);
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return sg;
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}
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static void mmc_queue_setup_discard(struct request_queue *q,
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struct mmc_card *card)
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{
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unsigned max_discard;
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max_discard = mmc_calc_max_discard(card);
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if (!max_discard)
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return;
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queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
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blk_queue_max_discard_sectors(q, max_discard);
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q->limits.discard_granularity = card->pref_erase << 9;
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/* granularity must not be greater than max. discard */
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if (card->pref_erase > max_discard)
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q->limits.discard_granularity = 0;
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if (mmc_can_secure_erase_trim(card))
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queue_flag_set_unlocked(QUEUE_FLAG_SECERASE, q);
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}
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static unsigned int mmc_queue_calc_bouncesz(struct mmc_host *host)
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{
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unsigned int bouncesz = MMC_QUEUE_BOUNCESZ;
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if (host->max_segs != 1 || (host->caps & MMC_CAP_NO_BOUNCE_BUFF))
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return 0;
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if (bouncesz > host->max_req_size)
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bouncesz = host->max_req_size;
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if (bouncesz > host->max_seg_size)
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bouncesz = host->max_seg_size;
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if (bouncesz > host->max_blk_count * 512)
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bouncesz = host->max_blk_count * 512;
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if (bouncesz <= 512)
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return 0;
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return bouncesz;
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}
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/**
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* mmc_init_request() - initialize the MMC-specific per-request data
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* @q: the request queue
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* @req: the request
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* @gfp: memory allocation policy
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*/
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static int mmc_init_request(struct request_queue *q, struct request *req,
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gfp_t gfp)
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{
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struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req);
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struct mmc_queue *mq = q->queuedata;
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struct mmc_card *card = mq->card;
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struct mmc_host *host = card->host;
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if (card->bouncesz) {
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mq_rq->bounce_buf = kmalloc(card->bouncesz, gfp);
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if (!mq_rq->bounce_buf)
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return -ENOMEM;
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if (card->bouncesz > 512) {
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mq_rq->sg = mmc_alloc_sg(1, gfp);
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if (!mq_rq->sg)
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return -ENOMEM;
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mq_rq->bounce_sg = mmc_alloc_sg(card->bouncesz / 512,
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gfp);
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if (!mq_rq->bounce_sg)
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return -ENOMEM;
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}
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} else {
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mq_rq->bounce_buf = NULL;
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mq_rq->bounce_sg = NULL;
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mq_rq->sg = mmc_alloc_sg(host->max_segs, gfp);
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if (!mq_rq->sg)
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return -ENOMEM;
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}
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return 0;
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}
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static void mmc_exit_request(struct request_queue *q, struct request *req)
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{
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struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req);
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/* It is OK to kfree(NULL) so this will be smooth */
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kfree(mq_rq->bounce_sg);
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mq_rq->bounce_sg = NULL;
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kfree(mq_rq->bounce_buf);
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mq_rq->bounce_buf = NULL;
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kfree(mq_rq->sg);
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mq_rq->sg = NULL;
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}
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/**
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* mmc_init_queue - initialise a queue structure.
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* @mq: mmc queue
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* @card: mmc card to attach this queue
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* @lock: queue lock
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* @subname: partition subname
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*
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* Initialise a MMC card request queue.
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*/
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int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
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spinlock_t *lock, const char *subname)
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{
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struct mmc_host *host = card->host;
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u64 limit = BLK_BOUNCE_HIGH;
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int ret = -ENOMEM;
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if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
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limit = (u64)dma_max_pfn(mmc_dev(host)) << PAGE_SHIFT;
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mq->card = card;
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mq->queue = blk_alloc_queue(GFP_KERNEL);
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if (!mq->queue)
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return -ENOMEM;
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mq->queue->queue_lock = lock;
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mq->queue->request_fn = mmc_request_fn;
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mq->queue->init_rq_fn = mmc_init_request;
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mq->queue->exit_rq_fn = mmc_exit_request;
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mq->queue->cmd_size = sizeof(struct mmc_queue_req);
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mq->queue->queuedata = mq;
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mq->qcnt = 0;
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ret = blk_init_allocated_queue(mq->queue);
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if (ret) {
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blk_cleanup_queue(mq->queue);
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return ret;
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}
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blk_queue_prep_rq(mq->queue, mmc_prep_request);
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queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mq->queue);
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queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, mq->queue);
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if (mmc_can_erase(card))
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mmc_queue_setup_discard(mq->queue, card);
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card->bouncesz = mmc_queue_calc_bouncesz(host);
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if (card->bouncesz) {
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blk_queue_max_hw_sectors(mq->queue, card->bouncesz / 512);
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blk_queue_max_segments(mq->queue, card->bouncesz / 512);
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blk_queue_max_segment_size(mq->queue, card->bouncesz);
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} else {
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blk_queue_bounce_limit(mq->queue, limit);
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blk_queue_max_hw_sectors(mq->queue,
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min(host->max_blk_count, host->max_req_size / 512));
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blk_queue_max_segments(mq->queue, host->max_segs);
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blk_queue_max_segment_size(mq->queue, host->max_seg_size);
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}
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sema_init(&mq->thread_sem, 1);
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mq->thread = kthread_run(mmc_queue_thread, mq, "mmcqd/%d%s",
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host->index, subname ? subname : "");
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if (IS_ERR(mq->thread)) {
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ret = PTR_ERR(mq->thread);
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goto cleanup_queue;
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}
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return 0;
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cleanup_queue:
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blk_cleanup_queue(mq->queue);
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return ret;
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}
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void mmc_cleanup_queue(struct mmc_queue *mq)
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{
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struct request_queue *q = mq->queue;
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unsigned long flags;
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/* Make sure the queue isn't suspended, as that will deadlock */
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mmc_queue_resume(mq);
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/* Then terminate our worker thread */
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kthread_stop(mq->thread);
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/* Empty the queue */
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spin_lock_irqsave(q->queue_lock, flags);
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q->queuedata = NULL;
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blk_start_queue(q);
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spin_unlock_irqrestore(q->queue_lock, flags);
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mq->card = NULL;
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}
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EXPORT_SYMBOL(mmc_cleanup_queue);
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/**
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* mmc_queue_suspend - suspend a MMC request queue
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* @mq: MMC queue to suspend
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*
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* Stop the block request queue, and wait for our thread to
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* complete any outstanding requests. This ensures that we
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* won't suspend while a request is being processed.
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*/
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void mmc_queue_suspend(struct mmc_queue *mq)
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{
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struct request_queue *q = mq->queue;
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unsigned long flags;
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if (!mq->suspended) {
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mq->suspended |= true;
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spin_lock_irqsave(q->queue_lock, flags);
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blk_stop_queue(q);
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spin_unlock_irqrestore(q->queue_lock, flags);
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down(&mq->thread_sem);
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}
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}
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/**
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* mmc_queue_resume - resume a previously suspended MMC request queue
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* @mq: MMC queue to resume
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*/
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void mmc_queue_resume(struct mmc_queue *mq)
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{
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struct request_queue *q = mq->queue;
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unsigned long flags;
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if (mq->suspended) {
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mq->suspended = false;
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up(&mq->thread_sem);
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spin_lock_irqsave(q->queue_lock, flags);
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blk_start_queue(q);
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spin_unlock_irqrestore(q->queue_lock, flags);
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}
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}
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/*
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* Prepare the sg list(s) to be handed of to the host driver
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*/
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unsigned int mmc_queue_map_sg(struct mmc_queue *mq, struct mmc_queue_req *mqrq)
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{
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unsigned int sg_len;
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size_t buflen;
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struct scatterlist *sg;
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struct request *req = mmc_queue_req_to_req(mqrq);
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int i;
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if (!mqrq->bounce_buf)
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return blk_rq_map_sg(mq->queue, req, mqrq->sg);
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sg_len = blk_rq_map_sg(mq->queue, req, mqrq->bounce_sg);
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mqrq->bounce_sg_len = sg_len;
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buflen = 0;
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for_each_sg(mqrq->bounce_sg, sg, sg_len, i)
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buflen += sg->length;
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sg_init_one(mqrq->sg, mqrq->bounce_buf, buflen);
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return 1;
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}
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/*
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* If writing, bounce the data to the buffer before the request
|
|
* is sent to the host driver
|
|
*/
|
|
void mmc_queue_bounce_pre(struct mmc_queue_req *mqrq)
|
|
{
|
|
if (!mqrq->bounce_buf)
|
|
return;
|
|
|
|
if (rq_data_dir(mmc_queue_req_to_req(mqrq)) != WRITE)
|
|
return;
|
|
|
|
sg_copy_to_buffer(mqrq->bounce_sg, mqrq->bounce_sg_len,
|
|
mqrq->bounce_buf, mqrq->sg[0].length);
|
|
}
|
|
|
|
/*
|
|
* If reading, bounce the data from the buffer after the request
|
|
* has been handled by the host driver
|
|
*/
|
|
void mmc_queue_bounce_post(struct mmc_queue_req *mqrq)
|
|
{
|
|
if (!mqrq->bounce_buf)
|
|
return;
|
|
|
|
if (rq_data_dir(mmc_queue_req_to_req(mqrq)) != READ)
|
|
return;
|
|
|
|
sg_copy_from_buffer(mqrq->bounce_sg, mqrq->bounce_sg_len,
|
|
mqrq->bounce_buf, mqrq->sg[0].length);
|
|
}
|