diff options
Diffstat (limited to 'drivers/mmc/core/core.c')
| -rw-r--r-- | drivers/mmc/core/core.c | 2393 |
1 files changed, 1035 insertions, 1358 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 49a5bca418bd..860378bea557 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/drivers/mmc/core/core.c * @@ -5,10 +6,6 @@ * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved. * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved. - * - * 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. */ #include <linux/module.h> #include <linux/init.h> @@ -21,79 +18,58 @@ #include <linux/leds.h> #include <linux/scatterlist.h> #include <linux/log2.h> -#include <linux/regulator/consumer.h> #include <linux/pm_runtime.h> #include <linux/suspend.h> #include <linux/fault-inject.h> #include <linux/random.h> #include <linux/slab.h> +#include <linux/of.h> #include <linux/mmc/card.h> #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> #include <linux/mmc/sd.h> +#include <linux/mmc/slot-gpio.h> + +#define CREATE_TRACE_POINTS +#include <trace/events/mmc.h> #include "core.h" +#include "card.h" +#include "crypto.h" #include "bus.h" #include "host.h" #include "sdio_bus.h" +#include "pwrseq.h" #include "mmc_ops.h" #include "sd_ops.h" #include "sdio_ops.h" -/* If the device is not responding */ -#define MMC_CORE_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */ +/* The max erase timeout, used when host->max_busy_timeout isn't specified */ +#define MMC_ERASE_TIMEOUT_MS (60 * 1000) /* 60 s */ +#define SD_DISCARD_TIMEOUT_MS (250) -/* - * Background operations can take a long time, depending on the housekeeping - * operations the card has to perform. - */ -#define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */ - -static struct workqueue_struct *workqueue; static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; /* * Enabling software CRCs on the data blocks can be a significant (30%) * performance cost, and for other reasons may not always be desired. - * So we allow it it to be disabled. + * So we allow it to be disabled. */ bool use_spi_crc = 1; module_param(use_spi_crc, bool, 0); -/* - * We normally treat cards as removed during suspend if they are not - * known to be on a non-removable bus, to avoid the risk of writing - * back data to a different card after resume. Allow this to be - * overridden if necessary. - */ -#ifdef CONFIG_MMC_UNSAFE_RESUME -bool mmc_assume_removable; -#else -bool mmc_assume_removable = 1; -#endif -EXPORT_SYMBOL(mmc_assume_removable); -module_param_named(removable, mmc_assume_removable, bool, 0644); -MODULE_PARM_DESC( - removable, - "MMC/SD cards are removable and may be removed during suspend"); - -/* - * Internal function. Schedule delayed work in the MMC work queue. - */ static int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay) { - return queue_delayed_work(workqueue, work, delay); -} - -/* - * Internal function. Flush all scheduled work from the MMC work queue. - */ -static void mmc_flush_scheduled_work(void) -{ - flush_workqueue(workqueue); + /* + * We use the system_freezable_wq, because of two reasons. + * First, it allows several works (not the same work item) to be + * executed simultaneously. Second, the queue becomes frozen when + * userspace becomes frozen during system PM. + */ + return queue_delayed_work(system_freezable_wq, work, delay); } #ifdef CONFIG_FAIL_MMC_REQUEST @@ -116,12 +92,12 @@ static void mmc_should_fail_request(struct mmc_host *host, if (!data) return; - if (cmd->error || data->error || + if ((cmd && cmd->error) || data->error || !should_fail(&host->fail_mmc_request, data->blksz * data->blocks)) return; - data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)]; - data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9; + data->error = data_errors[get_random_u32_below(ARRAY_SIZE(data_errors))]; + data->bytes_xfered = get_random_u32_below(data->bytes_xfered >> 9) << 9; } #else /* CONFIG_FAIL_MMC_REQUEST */ @@ -133,6 +109,24 @@ static inline void mmc_should_fail_request(struct mmc_host *host, #endif /* CONFIG_FAIL_MMC_REQUEST */ +static inline void mmc_complete_cmd(struct mmc_request *mrq) +{ + if (mrq->cap_cmd_during_tfr && !completion_done(&mrq->cmd_completion)) + complete_all(&mrq->cmd_completion); +} + +void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq) +{ + if (!mrq->cap_cmd_during_tfr) + return; + + mmc_complete_cmd(mrq); + + pr_debug("%s: cmd done, tfr ongoing (CMD%u)\n", + mmc_hostname(host), mrq->cmd->opcode); +} +EXPORT_SYMBOL(mmc_command_done); + /** * mmc_request_done - finish processing an MMC request * @host: MMC host which completed request @@ -146,22 +140,48 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) struct mmc_command *cmd = mrq->cmd; int err = cmd->error; + /* Flag re-tuning needed on CRC errors */ + if (!mmc_op_tuning(cmd->opcode) && + !host->retune_crc_disable && + (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) || + (mrq->data && mrq->data->error == -EILSEQ) || + (mrq->stop && mrq->stop->error == -EILSEQ))) + mmc_retune_needed(host); + if (err && cmd->retries && mmc_host_is_spi(host)) { if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND) cmd->retries = 0; } - if (err && cmd->retries && !mmc_card_removed(host->card)) { - /* - * Request starter must handle retries - see - * mmc_wait_for_req_done(). - */ - if (mrq->done) - mrq->done(mrq); - } else { + if (host->ongoing_mrq == mrq) + host->ongoing_mrq = NULL; + + mmc_complete_cmd(mrq); + + trace_mmc_request_done(host, mrq); + + /* + * We list various conditions for the command to be considered + * properly done: + * + * - There was no error, OK fine then + * - We are not doing some kind of retry + * - The card was removed (...so just complete everything no matter + * if there are errors or retries) + */ + if (!err || !cmd->retries || mmc_card_removed(host->card)) { mmc_should_fail_request(host, mrq); - led_trigger_event(host->led, LED_OFF); + if (!host->ongoing_mrq) + led_trigger_event(host->led, LED_OFF); + + if (mrq->sbc) { + pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n", + mmc_hostname(host), mrq->sbc->opcode, + mrq->sbc->error, + mrq->sbc->resp[0], mrq->sbc->resp[1], + mrq->sbc->resp[2], mrq->sbc->resp[3]); + } pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n", mmc_hostname(host), cmd->opcode, err, @@ -181,33 +201,82 @@ void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq) mrq->stop->resp[0], mrq->stop->resp[1], mrq->stop->resp[2], mrq->stop->resp[3]); } - - if (mrq->done) - mrq->done(mrq); - - mmc_host_clk_release(host); } + /* + * Request starter must handle retries - see + * mmc_wait_for_req_done(). + */ + if (mrq->done) + mrq->done(mrq); } EXPORT_SYMBOL(mmc_request_done); -static void -mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) +static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) { -#ifdef CONFIG_MMC_DEBUG - unsigned int i, sz; - struct scatterlist *sg; -#endif + int err; + + /* Assumes host controller has been runtime resumed by mmc_claim_host */ + err = mmc_retune(host); + if (err) { + mrq->cmd->error = err; + mmc_request_done(host, mrq); + return; + } + /* + * For sdio rw commands we must wait for card busy otherwise some + * sdio devices won't work properly. + * And bypass I/O abort, reset and bus suspend operations. + */ + if (sdio_is_io_busy(mrq->cmd->opcode, mrq->cmd->arg) && + host->ops->card_busy) { + int tries = 500; /* Wait aprox 500ms at maximum */ + + while (host->ops->card_busy(host) && --tries) + mmc_delay(1); + + if (tries == 0) { + mrq->cmd->error = -EBUSY; + mmc_request_done(host, mrq); + return; + } + } + + if (mrq->cap_cmd_during_tfr) { + host->ongoing_mrq = mrq; + /* + * Retry path could come through here without having waiting on + * cmd_completion, so ensure it is reinitialised. + */ + reinit_completion(&mrq->cmd_completion); + } + + trace_mmc_request_start(host, mrq); + + if (host->cqe_on) + host->cqe_ops->cqe_off(host); + + host->ops->request(host, mrq); +} + +static void mmc_mrq_pr_debug(struct mmc_host *host, struct mmc_request *mrq, + bool cqe) +{ if (mrq->sbc) { pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n", mmc_hostname(host), mrq->sbc->opcode, mrq->sbc->arg, mrq->sbc->flags); } - pr_debug("%s: starting CMD%u arg %08x flags %08x\n", - mmc_hostname(host), mrq->cmd->opcode, - mrq->cmd->arg, mrq->cmd->flags); + if (mrq->cmd) { + pr_debug("%s: starting %sCMD%u arg %08x flags %08x\n", + mmc_hostname(host), cqe ? "CQE direct " : "", + mrq->cmd->opcode, mrq->cmd->arg, mrq->cmd->flags); + } else if (cqe) { + pr_debug("%s: starting CQE transfer for tag %d blkaddr %u\n", + mmc_hostname(host), mrq->tag, mrq->data->blk_addr); + } if (mrq->data) { pr_debug("%s: blksz %d blocks %d flags %08x " @@ -223,25 +292,33 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) mmc_hostname(host), mrq->stop->opcode, mrq->stop->arg, mrq->stop->flags); } +} - WARN_ON(!host->claimed); +static int mmc_mrq_prep(struct mmc_host *host, struct mmc_request *mrq) +{ + unsigned int i, sz = 0; + struct scatterlist *sg; - mrq->cmd->error = 0; - mrq->cmd->mrq = mrq; + if (mrq->cmd) { + mrq->cmd->error = 0; + mrq->cmd->mrq = mrq; + mrq->cmd->data = mrq->data; + } + if (mrq->sbc) { + mrq->sbc->error = 0; + mrq->sbc->mrq = mrq; + } if (mrq->data) { - BUG_ON(mrq->data->blksz > host->max_blk_size); - BUG_ON(mrq->data->blocks > host->max_blk_count); - BUG_ON(mrq->data->blocks * mrq->data->blksz > - host->max_req_size); + if (mrq->data->blksz > host->max_blk_size || + mrq->data->blocks > host->max_blk_count || + mrq->data->blocks * mrq->data->blksz > host->max_req_size) + return -EINVAL; -#ifdef CONFIG_MMC_DEBUG - sz = 0; for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i) sz += sg->length; - BUG_ON(sz != mrq->data->blocks * mrq->data->blksz); -#endif + if (sz != mrq->data->blocks * mrq->data->blksz) + return -EINVAL; - mrq->cmd->data = mrq->data; mrq->data->error = 0; mrq->data->mrq = mrq; if (mrq->stop) { @@ -250,186 +327,79 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) mrq->stop->mrq = mrq; } } - mmc_host_clk_hold(host); - led_trigger_event(host->led, LED_FULL); - host->ops->request(host, mrq); + + return 0; } -/** - * mmc_start_bkops - start BKOPS for supported cards - * @card: MMC card to start BKOPS - * @form_exception: A flag to indicate if this function was - * called due to an exception raised by the card - * - * Start background operations whenever requested. - * When the urgent BKOPS bit is set in a R1 command response - * then background operations should be started immediately. -*/ -void mmc_start_bkops(struct mmc_card *card, bool from_exception) +int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) { int err; - int timeout; - bool use_busy_signal; - BUG_ON(!card); + if (mrq->cmd->has_ext_addr) + mmc_send_ext_addr(host, mrq->cmd->ext_addr); - if (!card->ext_csd.bkops_en || mmc_card_doing_bkops(card)) - return; + init_completion(&mrq->cmd_completion); - err = mmc_read_bkops_status(card); - if (err) { - pr_err("%s: Failed to read bkops status: %d\n", - mmc_hostname(card->host), err); - return; - } + mmc_retune_hold(host); - if (!card->ext_csd.raw_bkops_status) - return; + if (mmc_card_removed(host->card)) + return -ENOMEDIUM; - if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 && - from_exception) - return; + mmc_mrq_pr_debug(host, mrq, false); - mmc_claim_host(card->host); - if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) { - timeout = MMC_BKOPS_MAX_TIMEOUT; - use_busy_signal = true; - } else { - timeout = 0; - use_busy_signal = false; - } + WARN_ON(!host->claimed); - err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_BKOPS_START, 1, timeout, use_busy_signal); - if (err) { - pr_warn("%s: Error %d starting bkops\n", - mmc_hostname(card->host), err); - goto out; - } + err = mmc_mrq_prep(host, mrq); + if (err) + return err; - /* - * For urgent bkops status (LEVEL_2 and more) - * bkops executed synchronously, otherwise - * the operation is in progress - */ - if (!use_busy_signal) - mmc_card_set_doing_bkops(card); -out: - mmc_release_host(card->host); -} -EXPORT_SYMBOL(mmc_start_bkops); + if (host->uhs2_sd_tran) + mmc_uhs2_prepare_cmd(host, mrq); -/* - * mmc_wait_data_done() - done callback for data request - * @mrq: done data request - * - * Wakes up mmc context, passed as a callback to host controller driver - */ -static void mmc_wait_data_done(struct mmc_request *mrq) -{ - mrq->host->context_info.is_done_rcv = true; - wake_up_interruptible(&mrq->host->context_info.wait); + led_trigger_event(host->led, LED_FULL); + __mmc_start_request(host, mrq); + + return 0; } +EXPORT_SYMBOL(mmc_start_request); static void mmc_wait_done(struct mmc_request *mrq) { complete(&mrq->completion); } -/* - *__mmc_start_data_req() - starts data request - * @host: MMC host to start the request - * @mrq: data request to start - * - * Sets the done callback to be called when request is completed by the card. - * Starts data mmc request execution - */ -static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq) +static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host) { - mrq->done = mmc_wait_data_done; - mrq->host = host; - if (mmc_card_removed(host->card)) { - mrq->cmd->error = -ENOMEDIUM; - mmc_wait_data_done(mrq); - return -ENOMEDIUM; - } - mmc_start_request(host, mrq); + struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq); - return 0; + /* + * If there is an ongoing transfer, wait for the command line to become + * available. + */ + if (ongoing_mrq && !completion_done(&ongoing_mrq->cmd_completion)) + wait_for_completion(&ongoing_mrq->cmd_completion); } static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) { + int err; + + mmc_wait_ongoing_tfr_cmd(host); + init_completion(&mrq->completion); mrq->done = mmc_wait_done; - if (mmc_card_removed(host->card)) { - mrq->cmd->error = -ENOMEDIUM; + + err = mmc_start_request(host, mrq); + if (err) { + mrq->cmd->error = err; + mmc_complete_cmd(mrq); complete(&mrq->completion); - return -ENOMEDIUM; } - mmc_start_request(host, mrq); - return 0; -} -/* - * mmc_wait_for_data_req_done() - wait for request completed - * @host: MMC host to prepare the command. - * @mrq: MMC request to wait for - * - * Blocks MMC context till host controller will ack end of data request - * execution or new request notification arrives from the block layer. - * Handles command retries. - * - * Returns enum mmc_blk_status after checking errors. - */ -static int mmc_wait_for_data_req_done(struct mmc_host *host, - struct mmc_request *mrq, - struct mmc_async_req *next_req) -{ - struct mmc_command *cmd; - struct mmc_context_info *context_info = &host->context_info; - int err; - unsigned long flags; - - while (1) { - wait_event_interruptible(context_info->wait, - (context_info->is_done_rcv || - context_info->is_new_req)); - spin_lock_irqsave(&context_info->lock, flags); - context_info->is_waiting_last_req = false; - spin_unlock_irqrestore(&context_info->lock, flags); - if (context_info->is_done_rcv) { - context_info->is_done_rcv = false; - context_info->is_new_req = false; - cmd = mrq->cmd; - - if (!cmd->error || !cmd->retries || - mmc_card_removed(host->card)) { - err = host->areq->err_check(host->card, - host->areq); - break; /* return err */ - } else { - pr_info("%s: req failed (CMD%u): %d, retrying...\n", - mmc_hostname(host), - cmd->opcode, cmd->error); - cmd->retries--; - cmd->error = 0; - host->ops->request(host, mrq); - continue; /* wait for done/new event again */ - } - } else if (context_info->is_new_req) { - context_info->is_new_req = false; - if (!next_req) { - err = MMC_BLK_NEW_REQUEST; - break; /* return err */ - } - } - } return err; } -static void mmc_wait_for_req_done(struct mmc_host *host, - struct mmc_request *mrq) +void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq) { struct mmc_command *cmd; @@ -438,226 +408,216 @@ static void mmc_wait_for_req_done(struct mmc_host *host, cmd = mrq->cmd; - /* - * If host has timed out waiting for the sanitize - * to complete, card might be still in programming state - * so let's try to bring the card out of programming - * state. - */ - if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) { - if (!mmc_interrupt_hpi(host->card)) { - pr_warning("%s: %s: Interrupted sanitize\n", - mmc_hostname(host), __func__); - cmd->error = 0; - break; - } else { - pr_err("%s: %s: Failed to interrupt sanitize\n", - mmc_hostname(host), __func__); - } - } if (!cmd->error || !cmd->retries || mmc_card_removed(host->card)) break; + mmc_retune_recheck(host); + pr_debug("%s: req failed (CMD%u): %d, retrying...\n", mmc_hostname(host), cmd->opcode, cmd->error); cmd->retries--; cmd->error = 0; - host->ops->request(host, mrq); + __mmc_start_request(host, mrq); } -} -/** - * mmc_pre_req - Prepare for a new request - * @host: MMC host to prepare command - * @mrq: MMC request to prepare for - * @is_first_req: true if there is no previous started request - * that may run in parellel to this call, otherwise false - * - * mmc_pre_req() is called in prior to mmc_start_req() to let - * host prepare for the new request. Preparation of a request may be - * performed while another request is running on the host. - */ -static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq, - bool is_first_req) -{ - if (host->ops->pre_req) { - mmc_host_clk_hold(host); - host->ops->pre_req(host, mrq, is_first_req); - mmc_host_clk_release(host); - } + mmc_retune_release(host); } +EXPORT_SYMBOL(mmc_wait_for_req_done); -/** - * mmc_post_req - Post process a completed request - * @host: MMC host to post process command - * @mrq: MMC request to post process for - * @err: Error, if non zero, clean up any resources made in pre_req +/* + * mmc_cqe_start_req - Start a CQE request. + * @host: MMC host to start the request + * @mrq: request to start * - * Let the host post process a completed request. Post processing of - * a request may be performed while another reuqest is running. + * Start the request, re-tuning if needed and it is possible. Returns an error + * code if the request fails to start or -EBUSY if CQE is busy. */ -static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, - int err) +int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq) { - if (host->ops->post_req) { - mmc_host_clk_hold(host); - host->ops->post_req(host, mrq, err); - mmc_host_clk_release(host); + int err; + + /* + * CQE cannot process re-tuning commands. Caller must hold retuning + * while CQE is in use. Re-tuning can happen here only when CQE has no + * active requests i.e. this is the first. Note, re-tuning will call + * ->cqe_off(). + */ + err = mmc_retune(host); + if (err) + goto out_err; + + mrq->host = host; + + mmc_mrq_pr_debug(host, mrq, true); + + err = mmc_mrq_prep(host, mrq); + if (err) + goto out_err; + + if (host->uhs2_sd_tran) + mmc_uhs2_prepare_cmd(host, mrq); + + err = host->cqe_ops->cqe_request(host, mrq); + if (err) + goto out_err; + + trace_mmc_request_start(host, mrq); + + return 0; + +out_err: + if (mrq->cmd) { + pr_debug("%s: failed to start CQE direct CMD%u, error %d\n", + mmc_hostname(host), mrq->cmd->opcode, err); + } else { + pr_debug("%s: failed to start CQE transfer for tag %d, error %d\n", + mmc_hostname(host), mrq->tag, err); } + return err; } +EXPORT_SYMBOL(mmc_cqe_start_req); /** - * mmc_start_req - start a non-blocking request - * @host: MMC host to start command - * @areq: async request to start - * @error: out parameter returns 0 for success, otherwise non zero - * - * Start a new MMC custom command request for a host. - * If there is on ongoing async request wait for completion - * of that request and start the new one and return. - * Does not wait for the new request to complete. + * mmc_cqe_request_done - CQE has finished processing an MMC request + * @host: MMC host which completed request + * @mrq: MMC request which completed * - * Returns the completed request, NULL in case of none completed. - * Wait for the an ongoing request (previoulsy started) to complete and - * return the completed request. If there is no ongoing request, NULL - * is returned without waiting. NULL is not an error condition. + * CQE drivers should call this function when they have completed + * their processing of a request. */ -struct mmc_async_req *mmc_start_req(struct mmc_host *host, - struct mmc_async_req *areq, int *error) +void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq) { - int err = 0; - int start_err = 0; - struct mmc_async_req *data = host->areq; - - /* Prepare a new request */ - if (areq) - mmc_pre_req(host, areq->mrq, !host->areq); - - if (host->areq) { - err = mmc_wait_for_data_req_done(host, host->areq->mrq, areq); - if (err == MMC_BLK_NEW_REQUEST) { - if (error) - *error = err; - /* - * The previous request was not completed, - * nothing to return - */ - return NULL; - } - /* - * Check BKOPS urgency for each R1 response - */ - if (host->card && mmc_card_mmc(host->card) && - ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) || - (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) && - (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) - mmc_start_bkops(host->card, true); - } + mmc_should_fail_request(host, mrq); - if (!err && areq) - start_err = __mmc_start_data_req(host, areq->mrq); + /* Flag re-tuning needed on CRC errors */ + if ((mrq->cmd && mrq->cmd->error == -EILSEQ) || + (mrq->data && mrq->data->error == -EILSEQ)) + mmc_retune_needed(host); - if (host->areq) - mmc_post_req(host, host->areq->mrq, 0); + trace_mmc_request_done(host, mrq); - /* Cancel a prepared request if it was not started. */ - if ((err || start_err) && areq) - mmc_post_req(host, areq->mrq, -EINVAL); + if (mrq->cmd) { + pr_debug("%s: CQE req done (direct CMD%u): %d\n", + mmc_hostname(host), mrq->cmd->opcode, mrq->cmd->error); + } else { + pr_debug("%s: CQE transfer done tag %d\n", + mmc_hostname(host), mrq->tag); + } - if (err) - host->areq = NULL; - else - host->areq = areq; + if (mrq->data) { + pr_debug("%s: %d bytes transferred: %d\n", + mmc_hostname(host), + mrq->data->bytes_xfered, mrq->data->error); + } - if (error) - *error = err; - return data; + mrq->done(mrq); } -EXPORT_SYMBOL(mmc_start_req); +EXPORT_SYMBOL(mmc_cqe_request_done); /** - * mmc_wait_for_req - start a request and wait for completion - * @host: MMC host to start command - * @mrq: MMC request to start - * - * Start a new MMC custom command request for a host, and wait - * for the command to complete. Does not attempt to parse the - * response. + * mmc_cqe_post_req - CQE post process of a completed MMC request + * @host: MMC host + * @mrq: MMC request to be processed */ -void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) +void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq) { - __mmc_start_req(host, mrq); - mmc_wait_for_req_done(host, mrq); + if (host->cqe_ops->cqe_post_req) + host->cqe_ops->cqe_post_req(host, mrq); } -EXPORT_SYMBOL(mmc_wait_for_req); +EXPORT_SYMBOL(mmc_cqe_post_req); -/** - * mmc_interrupt_hpi - Issue for High priority Interrupt - * @card: the MMC card associated with the HPI transfer +/* Arbitrary 1 second timeout */ +#define MMC_CQE_RECOVERY_TIMEOUT 1000 + +/* + * mmc_cqe_recovery - Recover from CQE errors. + * @host: MMC host to recover * - * Issued High Priority Interrupt, and check for card status - * until out-of prg-state. + * Recovery consists of stopping CQE, stopping eMMC, discarding the queue + * in eMMC, and discarding the queue in CQE. CQE must call + * mmc_cqe_request_done() on all requests. An error is returned if the eMMC + * fails to discard its queue. */ -int mmc_interrupt_hpi(struct mmc_card *card) +int mmc_cqe_recovery(struct mmc_host *host) { + struct mmc_command cmd; int err; - u32 status; - unsigned long prg_wait; - BUG_ON(!card); + mmc_retune_hold_now(host); - if (!card->ext_csd.hpi_en) { - pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host)); - return 1; - } + /* + * Recovery is expected seldom, if at all, but it reduces performance, + * so make sure it is not completely silent. + */ + pr_warn("%s: running CQE recovery\n", mmc_hostname(host)); - mmc_claim_host(card->host); - err = mmc_send_status(card, &status); - if (err) { - pr_err("%s: Get card status fail\n", mmc_hostname(card->host)); - goto out; - } + host->cqe_ops->cqe_recovery_start(host); - switch (R1_CURRENT_STATE(status)) { - case R1_STATE_IDLE: - case R1_STATE_READY: - case R1_STATE_STBY: - case R1_STATE_TRAN: - /* - * In idle and transfer states, HPI is not needed and the caller - * can issue the next intended command immediately - */ - goto out; - case R1_STATE_PRG: - break; - default: - /* In all other states, it's illegal to issue HPI */ - pr_debug("%s: HPI cannot be sent. Card state=%d\n", - mmc_hostname(card->host), R1_CURRENT_STATE(status)); - err = -EINVAL; - goto out; - } + memset(&cmd, 0, sizeof(cmd)); + cmd.opcode = MMC_STOP_TRANSMISSION; + cmd.flags = MMC_RSP_R1B_NO_CRC | MMC_CMD_AC; /* Ignore CRC */ + cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT; + mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); - err = mmc_send_hpi_cmd(card, &status); - if (err) - goto out; + mmc_poll_for_busy(host->card, MMC_CQE_RECOVERY_TIMEOUT, true, MMC_BUSY_IO); - prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time); - do { - err = mmc_send_status(card, &status); + memset(&cmd, 0, sizeof(cmd)); + cmd.opcode = MMC_CMDQ_TASK_MGMT; + cmd.arg = 1; /* Discard entire queue */ + cmd.flags = MMC_RSP_R1B_NO_CRC | MMC_CMD_AC; /* Ignore CRC */ + cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT; + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); - if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN) - break; - if (time_after(jiffies, prg_wait)) - err = -ETIMEDOUT; - } while (!err); + host->cqe_ops->cqe_recovery_finish(host); + + if (err) + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + + mmc_retune_release(host); -out: - mmc_release_host(card->host); return err; } -EXPORT_SYMBOL(mmc_interrupt_hpi); +EXPORT_SYMBOL(mmc_cqe_recovery); + +/** + * mmc_is_req_done - Determine if a 'cap_cmd_during_tfr' request is done + * @host: MMC host + * @mrq: MMC request + * + * mmc_is_req_done() is used with requests that have + * mrq->cap_cmd_during_tfr = true. mmc_is_req_done() must be called after + * starting a request and before waiting for it to complete. That is, + * either in between calls to mmc_start_req(), or after mmc_wait_for_req() + * and before mmc_wait_for_req_done(). If it is called at other times the + * result is not meaningful. + */ +bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq) +{ + return completion_done(&mrq->completion); +} +EXPORT_SYMBOL(mmc_is_req_done); + +/** + * mmc_wait_for_req - start a request and wait for completion + * @host: MMC host to start command + * @mrq: MMC request to start + * + * Start a new MMC custom command request for a host, and wait + * for the command to complete. In the case of 'cap_cmd_during_tfr' + * requests, the transfer is ongoing and the caller can issue further + * commands that do not use the data lines, and then wait by calling + * mmc_wait_for_req_done(). + * Does not attempt to parse the response. + */ +void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq) +{ + __mmc_start_req(host, mrq); + + if (!mrq->cap_cmd_during_tfr) + mmc_wait_for_req_done(host, mrq); +} +EXPORT_SYMBOL(mmc_wait_for_req); /** * mmc_wait_for_cmd - start a command and wait for completion @@ -671,7 +631,7 @@ EXPORT_SYMBOL(mmc_interrupt_hpi); */ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries) { - struct mmc_request mrq = {NULL}; + struct mmc_request mrq = {}; WARN_ON(!host->claimed); @@ -689,64 +649,6 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries EXPORT_SYMBOL(mmc_wait_for_cmd); /** - * mmc_stop_bkops - stop ongoing BKOPS - * @card: MMC card to check BKOPS - * - * Send HPI command to stop ongoing background operations to - * allow rapid servicing of foreground operations, e.g. read/ - * writes. Wait until the card comes out of the programming state - * to avoid errors in servicing read/write requests. - */ -int mmc_stop_bkops(struct mmc_card *card) -{ - int err = 0; - - BUG_ON(!card); - err = mmc_interrupt_hpi(card); - - /* - * If err is EINVAL, we can't issue an HPI. - * It should complete the BKOPS. - */ - if (!err || (err == -EINVAL)) { - mmc_card_clr_doing_bkops(card); - err = 0; - } - - return err; -} -EXPORT_SYMBOL(mmc_stop_bkops); - -int mmc_read_bkops_status(struct mmc_card *card) -{ - int err; - u8 *ext_csd; - - /* - * In future work, we should consider storing the entire ext_csd. - */ - ext_csd = kmalloc(512, GFP_KERNEL); - if (!ext_csd) { - pr_err("%s: could not allocate buffer to receive the ext_csd.\n", - mmc_hostname(card->host)); - return -ENOMEM; - } - - mmc_claim_host(card->host); - err = mmc_send_ext_csd(card, ext_csd); - mmc_release_host(card->host); - if (err) - goto out; - - card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS]; - card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS]; -out: - kfree(ext_csd); - return err; -} -EXPORT_SYMBOL(mmc_read_bkops_status); - -/** * mmc_set_data_timeout - set the timeout for a data command * @data: data phase for command * @card: the MMC card associated with the data transfer @@ -779,8 +681,8 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) if (data->flags & MMC_DATA_WRITE) mult <<= card->csd.r2w_factor; - data->timeout_ns = card->csd.tacc_ns * mult; - data->timeout_clks = card->csd.tacc_clks * mult; + data->timeout_ns = card->csd.taac_ns * mult; + data->timeout_clks = card->csd.taac_clks * mult; /* * SD cards also have an upper limit on the timeout. @@ -789,9 +691,9 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) unsigned int timeout_us, limit_us; timeout_us = data->timeout_ns / 1000; - if (mmc_host_clk_rate(card->host)) + if (card->host->ios.clock) timeout_us += data->timeout_clks * 1000 / - (mmc_host_clk_rate(card->host) / 1000); + (card->host->ios.clock / 1000); if (data->flags & MMC_DATA_WRITE) /* @@ -809,20 +711,24 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) /* * SDHC cards always use these fixed values. */ - if (timeout_us > limit_us || mmc_card_blockaddr(card)) { + if (timeout_us > limit_us) { data->timeout_ns = limit_us * 1000; data->timeout_clks = 0; } + + /* assign limit value if invalid */ + if (timeout_us == 0) + data->timeout_ns = limit_us * 1000; } /* * Some cards require longer data read timeout than indicated in CSD. * Address this by setting the read timeout to a "reasonably high" - * value. For the cards tested, 300ms has proven enough. If necessary, + * value. For the cards tested, 600ms has proven enough. If necessary, * this value can be increased if other problematic cards require this. */ if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) { - data->timeout_ns = 300000000; + data->timeout_ns = 600000000; data->timeout_clks = 0; } @@ -844,36 +750,36 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card) } EXPORT_SYMBOL(mmc_set_data_timeout); -/** - * mmc_align_data_size - pads a transfer size to a more optimal value - * @card: the MMC card associated with the data transfer - * @sz: original transfer size - * - * Pads the original data size with a number of extra bytes in - * order to avoid controller bugs and/or performance hits - * (e.g. some controllers revert to PIO for certain sizes). - * - * Returns the improved size, which might be unmodified. - * - * Note that this function is only relevant when issuing a - * single scatter gather entry. +/* + * Allow claiming an already claimed host if the context is the same or there is + * no context but the task is the same. */ -unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz) +static inline bool mmc_ctx_matches(struct mmc_host *host, struct mmc_ctx *ctx, + struct task_struct *task) { - /* - * FIXME: We don't have a system for the controller to tell - * the core about its problems yet, so for now we just 32-bit - * align the size. - */ - sz = ((sz + 3) / 4) * 4; + return host->claimer == ctx || + (!ctx && task && host->claimer->task == task); +} - return sz; +static inline void mmc_ctx_set_claimer(struct mmc_host *host, + struct mmc_ctx *ctx, + struct task_struct *task) +{ + if (!host->claimer) { + if (ctx) + host->claimer = ctx; + else + host->claimer = &host->default_ctx; + } + if (task) + host->claimer->task = task; } -EXPORT_SYMBOL(mmc_align_data_size); /** * __mmc_claim_host - exclusively claim a host * @host: mmc host to claim + * @ctx: context that claims the host or NULL in which case the default + * context will be used * @abort: whether or not the operation should be aborted * * Claim a host for a set of operations. If @abort is non null and @@ -881,11 +787,14 @@ EXPORT_SYMBOL(mmc_align_data_size); * that non-zero value without acquiring the lock. Returns zero * with the lock held otherwise. */ -int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) +int __mmc_claim_host(struct mmc_host *host, struct mmc_ctx *ctx, + atomic_t *abort) { + struct task_struct *task = ctx ? NULL : current; DECLARE_WAITQUEUE(wait, current); unsigned long flags; int stop; + bool pm = false; might_sleep(); @@ -894,7 +803,7 @@ int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) while (1) { set_current_state(TASK_UNINTERRUPTIBLE); stop = abort ? atomic_read(abort) : 0; - if (stop || !host->claimed || host->claimer == current) + if (stop || !host->claimed || mmc_ctx_matches(host, ctx, task)) break; spin_unlock_irqrestore(&host->lock, flags); schedule(); @@ -903,43 +812,21 @@ int __mmc_claim_host(struct mmc_host *host, atomic_t *abort) set_current_state(TASK_RUNNING); if (!stop) { host->claimed = 1; - host->claimer = current; + mmc_ctx_set_claimer(host, ctx, task); host->claim_cnt += 1; + if (host->claim_cnt == 1) + pm = true; } else wake_up(&host->wq); spin_unlock_irqrestore(&host->lock, flags); remove_wait_queue(&host->wq, &wait); - if (host->ops->enable && !stop && host->claim_cnt == 1) - host->ops->enable(host); - return stop; -} -EXPORT_SYMBOL(__mmc_claim_host); + if (pm) + pm_runtime_get_sync(mmc_dev(host)); -/** - * mmc_try_claim_host - try exclusively to claim a host - * @host: mmc host to claim - * - * Returns %1 if the host is claimed, %0 otherwise. - */ -int mmc_try_claim_host(struct mmc_host *host) -{ - int claimed_host = 0; - unsigned long flags; - - spin_lock_irqsave(&host->lock, flags); - if (!host->claimed || host->claimer == current) { - host->claimed = 1; - host->claimer = current; - host->claim_cnt += 1; - claimed_host = 1; - } - spin_unlock_irqrestore(&host->lock, flags); - if (host->ops->enable && claimed_host && host->claim_cnt == 1) - host->ops->enable(host); - return claimed_host; + return stop; } -EXPORT_SYMBOL(mmc_try_claim_host); +EXPORT_SYMBOL(__mmc_claim_host); /** * mmc_release_host - release a host @@ -954,18 +841,21 @@ void mmc_release_host(struct mmc_host *host) WARN_ON(!host->claimed); - if (host->ops->disable && host->claim_cnt == 1) - host->ops->disable(host); - spin_lock_irqsave(&host->lock, flags); if (--host->claim_cnt) { /* Release for nested claim */ spin_unlock_irqrestore(&host->lock, flags); } else { host->claimed = 0; + host->claimer->task = NULL; host->claimer = NULL; spin_unlock_irqrestore(&host->lock, flags); wake_up(&host->wq); + pm_runtime_mark_last_busy(mmc_dev(host)); + if (host->caps & MMC_CAP_SYNC_RUNTIME_PM) + pm_runtime_put_sync_suspend(mmc_dev(host)); + else + pm_runtime_put_autosuspend(mmc_dev(host)); } } EXPORT_SYMBOL(mmc_release_host); @@ -974,10 +864,10 @@ EXPORT_SYMBOL(mmc_release_host); * This is a helper function, which fetches a runtime pm reference for the * card device and also claims the host. */ -void mmc_get_card(struct mmc_card *card) +void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx) { pm_runtime_get_sync(&card->dev); - mmc_claim_host(card->host); + __mmc_claim_host(card->host, ctx, NULL); } EXPORT_SYMBOL(mmc_get_card); @@ -985,10 +875,13 @@ EXPORT_SYMBOL(mmc_get_card); * This is a helper function, which releases the host and drops the runtime * pm reference for the card device. */ -void mmc_put_card(struct mmc_card *card) +void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx) { - mmc_release_host(card->host); - pm_runtime_mark_last_busy(&card->dev); + struct mmc_host *host = card->host; + + WARN_ON(ctx && host->claimer != ctx); + + mmc_release_host(host); pm_runtime_put_autosuspend(&card->dev); } EXPORT_SYMBOL(mmc_put_card); @@ -1005,10 +898,8 @@ static inline void mmc_set_ios(struct mmc_host *host) "width %u timing %u\n", mmc_hostname(host), ios->clock, ios->bus_mode, ios->power_mode, ios->chip_select, ios->vdd, - ios->bus_width, ios->timing); + 1 << ios->bus_width, ios->timing); - if (ios->clock > 0) - mmc_set_ungated(host); host->ops->set_ios(host, ios); } @@ -1017,19 +908,17 @@ static inline void mmc_set_ios(struct mmc_host *host) */ void mmc_set_chip_select(struct mmc_host *host, int mode) { - mmc_host_clk_hold(host); host->ios.chip_select = mode; mmc_set_ios(host); - mmc_host_clk_release(host); } /* * Sets the host clock to the highest possible frequency that * is below "hz". */ -static void __mmc_set_clock(struct mmc_host *host, unsigned int hz) +void mmc_set_clock(struct mmc_host *host, unsigned int hz) { - WARN_ON(hz < host->f_min); + WARN_ON(hz && hz < host->f_min); if (hz > host->f_max) hz = host->f_max; @@ -1038,77 +927,47 @@ static void __mmc_set_clock(struct mmc_host *host, unsigned int hz) mmc_set_ios(host); } -void mmc_set_clock(struct mmc_host *host, unsigned int hz) +int mmc_execute_tuning(struct mmc_card *card) { - mmc_host_clk_hold(host); - __mmc_set_clock(host, hz); - mmc_host_clk_release(host); -} + struct mmc_host *host = card->host; + u32 opcode; + int err; -#ifdef CONFIG_MMC_CLKGATE -/* - * This gates the clock by setting it to 0 Hz. - */ -void mmc_gate_clock(struct mmc_host *host) -{ - unsigned long flags; + if (!host->ops->execute_tuning) + return 0; - spin_lock_irqsave(&host->clk_lock, flags); - host->clk_old = host->ios.clock; - host->ios.clock = 0; - host->clk_gated = true; - spin_unlock_irqrestore(&host->clk_lock, flags); - mmc_set_ios(host); -} + if (host->cqe_on) + host->cqe_ops->cqe_off(host); -/* - * This restores the clock from gating by using the cached - * clock value. - */ -void mmc_ungate_clock(struct mmc_host *host) -{ - /* - * We should previously have gated the clock, so the clock shall - * be 0 here! The clock may however be 0 during initialization, - * when some request operations are performed before setting - * the frequency. When ungate is requested in that situation - * we just ignore the call. - */ - if (host->clk_old) { - BUG_ON(host->ios.clock); - /* This call will also set host->clk_gated to false */ - __mmc_set_clock(host, host->clk_old); - } -} + if (mmc_card_mmc(card)) + opcode = MMC_SEND_TUNING_BLOCK_HS200; + else + opcode = MMC_SEND_TUNING_BLOCK; -void mmc_set_ungated(struct mmc_host *host) -{ - unsigned long flags; + err = host->ops->execute_tuning(host, opcode); + if (!err) { + mmc_retune_clear(host); + mmc_retune_enable(host); + return 0; + } - /* - * We've been given a new frequency while the clock is gated, - * so make sure we regard this as ungating it. - */ - spin_lock_irqsave(&host->clk_lock, flags); - host->clk_gated = false; - spin_unlock_irqrestore(&host->clk_lock, flags); -} + /* Only print error when we don't check for card removal */ + if (!host->detect_change) { + pr_err("%s: tuning execution failed: %d\n", + mmc_hostname(host), err); + mmc_debugfs_err_stats_inc(host, MMC_ERR_TUNING); + } -#else -void mmc_set_ungated(struct mmc_host *host) -{ + return err; } -#endif /* * Change the bus mode (open drain/push-pull) of a host. */ void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) { - mmc_host_clk_hold(host); host->ios.bus_mode = mode; mmc_set_ios(host); - mmc_host_clk_release(host); } /* @@ -1116,10 +975,41 @@ void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) */ void mmc_set_bus_width(struct mmc_host *host, unsigned int width) { - mmc_host_clk_hold(host); host->ios.bus_width = width; mmc_set_ios(host); - mmc_host_clk_release(host); +} + +/* + * Set initial state after a power cycle or a hw_reset. + */ +void mmc_set_initial_state(struct mmc_host *host) +{ + if (host->cqe_on) + host->cqe_ops->cqe_off(host); + + mmc_retune_disable(host); + + if (mmc_host_is_spi(host)) + host->ios.chip_select = MMC_CS_HIGH; + else + host->ios.chip_select = MMC_CS_DONTCARE; + host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; + host->ios.bus_width = MMC_BUS_WIDTH_1; + host->ios.timing = MMC_TIMING_LEGACY; + host->ios.drv_type = 0; + host->ios.enhanced_strobe = false; + + /* + * Make sure we are in non-enhanced strobe mode before we + * actually enable it in ext_csd. + */ + if ((host->caps2 & MMC_CAP2_HS400_ES) && + host->ops->hs400_enhanced_strobe) + host->ops->hs400_enhanced_strobe(host, &host->ios); + + mmc_set_ios(host); + + mmc_crypto_set_initial_state(host); } /** @@ -1194,141 +1084,34 @@ u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max) return mask; } -EXPORT_SYMBOL(mmc_vddrange_to_ocrmask); - -#ifdef CONFIG_REGULATOR -/** - * mmc_regulator_get_ocrmask - return mask of supported voltages - * @supply: regulator to use - * - * This returns either a negative errno, or a mask of voltages that - * can be provided to MMC/SD/SDIO devices using the specified voltage - * regulator. This would normally be called before registering the - * MMC host adapter. - */ -int mmc_regulator_get_ocrmask(struct regulator *supply) +static int mmc_of_get_func_num(struct device_node *node) { - int result = 0; - int count; - int i; - - count = regulator_count_voltages(supply); - if (count < 0) - return count; - - for (i = 0; i < count; i++) { - int vdd_uV; - int vdd_mV; - - vdd_uV = regulator_list_voltage(supply, i); - if (vdd_uV <= 0) - continue; + u32 reg; + int ret; - vdd_mV = vdd_uV / 1000; - result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV); - } + ret = of_property_read_u32(node, "reg", ®); + if (ret < 0) + return ret; - return result; + return reg; } -EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask); -/** - * mmc_regulator_set_ocr - set regulator to match host->ios voltage - * @mmc: the host to regulate - * @supply: regulator to use - * @vdd_bit: zero for power off, else a bit number (host->ios.vdd) - * - * Returns zero on success, else negative errno. - * - * MMC host drivers may use this to enable or disable a regulator using - * a particular supply voltage. This would normally be called from the - * set_ios() method. - */ -int mmc_regulator_set_ocr(struct mmc_host *mmc, - struct regulator *supply, - unsigned short vdd_bit) +struct device_node *mmc_of_find_child_device(struct mmc_host *host, + unsigned func_num) { - int result = 0; - int min_uV, max_uV; - - if (vdd_bit) { - int tmp; - int voltage; - - /* - * REVISIT mmc_vddrange_to_ocrmask() may have set some - * bits this regulator doesn't quite support ... don't - * be too picky, most cards and regulators are OK with - * a 0.1V range goof (it's a small error percentage). - */ - tmp = vdd_bit - ilog2(MMC_VDD_165_195); - if (tmp == 0) { - min_uV = 1650 * 1000; - max_uV = 1950 * 1000; - } else { - min_uV = 1900 * 1000 + tmp * 100 * 1000; - max_uV = min_uV + 100 * 1000; - } - - /* - * If we're using a fixed/static regulator, don't call - * regulator_set_voltage; it would fail. - */ - voltage = regulator_get_voltage(supply); - - if (!regulator_can_change_voltage(supply)) - min_uV = max_uV = voltage; + struct device_node *node; - if (voltage < 0) - result = voltage; - else if (voltage < min_uV || voltage > max_uV) - result = regulator_set_voltage(supply, min_uV, max_uV); - else - result = 0; + if (!host->parent || !host->parent->of_node) + return NULL; - if (result == 0 && !mmc->regulator_enabled) { - result = regulator_enable(supply); - if (!result) - mmc->regulator_enabled = true; - } - } else if (mmc->regulator_enabled) { - result = regulator_disable(supply); - if (result == 0) - mmc->regulator_enabled = false; + for_each_child_of_node(host->parent->of_node, node) { + if (mmc_of_get_func_num(node) == func_num) + return node; } - if (result) - dev_err(mmc_dev(mmc), - "could not set regulator OCR (%d)\n", result); - return result; + return NULL; } -EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr); - -int mmc_regulator_get_supply(struct mmc_host *mmc) -{ - struct device *dev = mmc_dev(mmc); - struct regulator *supply; - int ret; - - supply = devm_regulator_get(dev, "vmmc"); - mmc->supply.vmmc = supply; - mmc->supply.vqmmc = devm_regulator_get(dev, "vqmmc"); - - if (IS_ERR(supply)) - return PTR_ERR(supply); - - ret = mmc_regulator_get_ocrmask(supply); - if (ret > 0) - mmc->ocr_avail = ret; - else - dev_warn(mmc_dev(mmc), "Failed getting OCR mask: %d\n", ret); - - return 0; -} -EXPORT_SYMBOL_GPL(mmc_regulator_get_supply); - -#endif /* CONFIG_REGULATOR */ /* * Mask off any voltages we don't support and select @@ -1338,38 +1121,50 @@ u32 mmc_select_voltage(struct mmc_host *host, u32 ocr) { int bit; - ocr &= host->ocr_avail; + /* + * Sanity check the voltages that the card claims to + * support. + */ + if (ocr & 0x7F) { + dev_warn(mmc_dev(host), + "card claims to support voltages below defined range\n"); + ocr &= ~0x7F; + } - bit = ffs(ocr); - if (bit) { - bit -= 1; + ocr &= host->ocr_avail; + if (!ocr) { + dev_warn(mmc_dev(host), "no support for card's volts\n"); + return 0; + } + if (!mmc_card_uhs2(host) && host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) { + bit = ffs(ocr) - 1; ocr &= 3 << bit; - - mmc_host_clk_hold(host); - host->ios.vdd = bit; - mmc_set_ios(host); - mmc_host_clk_release(host); + mmc_power_cycle(host, ocr); } else { - pr_warning("%s: host doesn't support card's voltages\n", - mmc_hostname(host)); - ocr = 0; + bit = fls(ocr) - 1; + /* + * The bit variable represents the highest voltage bit set in + * the OCR register. + * To keep a range of 2 values (e.g. 3.2V/3.3V and 3.3V/3.4V), + * we must shift the mask '3' with (bit - 1). + */ + ocr &= 3 << (bit - 1); + if (bit != host->ios.vdd) + dev_warn(mmc_dev(host), "exceeding card's volts\n"); } return ocr; } -int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) +int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) { int err = 0; int old_signal_voltage = host->ios.signal_voltage; host->ios.signal_voltage = signal_voltage; - if (host->ops->start_signal_voltage_switch) { - mmc_host_clk_hold(host); + if (host->ops->start_signal_voltage_switch) err = host->ops->start_signal_voltage_switch(host, &host->ios); - mmc_host_clk_release(host); - } if (err) host->ios.signal_voltage = old_signal_voltage; @@ -1378,20 +1173,44 @@ int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) } -int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) +void mmc_set_initial_signal_voltage(struct mmc_host *host) { - struct mmc_command cmd = {0}; - int err = 0; - u32 clock; + /* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */ + if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330)) + dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n"); + else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) + dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n"); + else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120)) + dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n"); +} - BUG_ON(!host); +int mmc_host_set_uhs_voltage(struct mmc_host *host) +{ + u32 clock; /* - * Send CMD11 only if the request is to switch the card to - * 1.8V signalling. + * During a signal voltage level switch, the clock must be gated + * for 5 ms according to the SD spec */ - if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) - return __mmc_set_signal_voltage(host, signal_voltage); + clock = host->ios.clock; + host->ios.clock = 0; + mmc_set_ios(host); + + if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) + return -EAGAIN; + + /* Keep clock gated for at least 10 ms, though spec only says 5 ms */ + mmc_delay(10); + host->ios.clock = clock; + mmc_set_ios(host); + + return 0; +} + +int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr) +{ + struct mmc_command cmd = {}; + int err = 0; /* * If we cannot switch voltages, return failure so the caller @@ -1400,8 +1219,8 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) if (!host->ops->start_signal_voltage_switch) return -EPERM; if (!host->ops->card_busy) - pr_warning("%s: cannot verify signal voltage switch\n", - mmc_hostname(host)); + pr_warn("%s: cannot verify signal voltage switch\n", + mmc_hostname(host)); cmd.opcode = SD_SWITCH_VOLTAGE; cmd.arg = 0; @@ -1409,12 +1228,11 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) err = mmc_wait_for_cmd(host, &cmd, 0); if (err) - return err; + goto power_cycle; if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR)) return -EIO; - mmc_host_clk_hold(host); /* * The card should drive cmd and dat[0:3] low immediately * after the response of cmd11, but wait 1 ms to be sure @@ -1424,15 +1242,8 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) err = -EAGAIN; goto power_cycle; } - /* - * During a signal voltage level switch, the clock must be gated - * for 5 ms according to the SD spec - */ - clock = host->ios.clock; - host->ios.clock = 0; - mmc_set_ios(host); - if (__mmc_set_signal_voltage(host, signal_voltage)) { + if (mmc_host_set_uhs_voltage(host)) { /* * Voltages may not have been switched, but we've already * sent CMD11, so a power cycle is required anyway @@ -1441,11 +1252,6 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) goto power_cycle; } - /* Keep clock gated for at least 5 ms */ - mmc_delay(5); - host->ios.clock = clock; - mmc_set_ios(host); - /* Wait for at least 1 ms according to spec */ mmc_delay(1); @@ -1460,11 +1266,9 @@ power_cycle: if (err) { pr_debug("%s: Signal voltage switch failed, " "power cycling card\n", mmc_hostname(host)); - mmc_power_cycle(host); + mmc_power_cycle(host, ocr); } - mmc_host_clk_release(host); - return err; } @@ -1473,10 +1277,8 @@ power_cycle: */ void mmc_set_timing(struct mmc_host *host, unsigned int timing) { - mmc_host_clk_hold(host); host->ios.timing = timing; mmc_set_ios(host); - mmc_host_clk_release(host); } /* @@ -1484,10 +1286,41 @@ void mmc_set_timing(struct mmc_host *host, unsigned int timing) */ void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) { - mmc_host_clk_hold(host); host->ios.drv_type = drv_type; mmc_set_ios(host); - mmc_host_clk_release(host); +} + +int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr, + int card_drv_type, int *drv_type) +{ + struct mmc_host *host = card->host; + int host_drv_type = SD_DRIVER_TYPE_B; + + *drv_type = 0; + + if (!host->ops->select_drive_strength) + return 0; + + /* Use SD definition of driver strength for hosts */ + if (host->caps & MMC_CAP_DRIVER_TYPE_A) + host_drv_type |= SD_DRIVER_TYPE_A; + + if (host->caps & MMC_CAP_DRIVER_TYPE_C) + host_drv_type |= SD_DRIVER_TYPE_C; + + if (host->caps & MMC_CAP_DRIVER_TYPE_D) + host_drv_type |= SD_DRIVER_TYPE_D; + + /* + * The drive strength that the hardware can support + * depends on the board design. Pass the appropriate + * information and let the hardware specific code + * return what is possible given the options + */ + return host->ops->select_drive_strength(card, max_dtr, + host_drv_type, + card_drv_type, + drv_type); } /* @@ -1501,40 +1334,27 @@ void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type) * If a host does all the power sequencing itself, ignore the * initial MMC_POWER_UP stage. */ -void mmc_power_up(struct mmc_host *host) +void mmc_power_up(struct mmc_host *host, u32 ocr) { - int bit; - if (host->ios.power_mode == MMC_POWER_ON) return; - mmc_host_clk_hold(host); - - /* If ocr is set, we use it */ - if (host->ocr) - bit = ffs(host->ocr) - 1; - else - bit = fls(host->ocr_avail) - 1; + mmc_pwrseq_pre_power_on(host); - host->ios.vdd = bit; - if (mmc_host_is_spi(host)) - host->ios.chip_select = MMC_CS_HIGH; - else - host->ios.chip_select = MMC_CS_DONTCARE; - host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; + host->ios.vdd = fls(ocr) - 1; host->ios.power_mode = MMC_POWER_UP; - host->ios.bus_width = MMC_BUS_WIDTH_1; - host->ios.timing = MMC_TIMING_LEGACY; - mmc_set_ios(host); + /* Set initial state and call mmc_set_ios */ + mmc_set_initial_state(host); - /* Set signal voltage to 3.3V */ - __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); + mmc_set_initial_signal_voltage(host); /* * This delay should be sufficient to allow the power supply * to reach the minimum voltage. */ - mmc_delay(10); + mmc_delay(host->ios.power_delay_ms); + + mmc_pwrseq_post_power_on(host); host->ios.clock = host->f_init; @@ -1545,9 +1365,7 @@ void mmc_power_up(struct mmc_host *host) * This delay must be at least 74 clock sizes, or 1 ms, or the * time required to reach a stable voltage. */ - mmc_delay(10); - - mmc_host_clk_release(host); + mmc_delay(host->ios.power_delay_ms); } void mmc_power_off(struct mmc_host *host) @@ -1555,26 +1373,14 @@ void mmc_power_off(struct mmc_host *host) if (host->ios.power_mode == MMC_POWER_OFF) return; - mmc_host_clk_hold(host); + mmc_pwrseq_power_off(host); host->ios.clock = 0; host->ios.vdd = 0; - - /* - * Reset ocr mask to be the highest possible voltage supported for - * this mmc host. This value will be used at next power up. - */ - host->ocr = 1 << (fls(host->ocr_avail) - 1); - - if (!mmc_host_is_spi(host)) { - host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; - host->ios.chip_select = MMC_CS_DONTCARE; - } host->ios.power_mode = MMC_POWER_OFF; - host->ios.bus_width = MMC_BUS_WIDTH_1; - host->ios.timing = MMC_TIMING_LEGACY; - mmc_set_ios(host); + /* Set initial state and call mmc_set_ios */ + mmc_set_initial_state(host); /* * Some configurations, such as the 802.11 SDIO card in the OLPC @@ -1582,55 +1388,37 @@ void mmc_power_off(struct mmc_host *host) * can be successfully turned on again. */ mmc_delay(1); - - mmc_host_clk_release(host); } -void mmc_power_cycle(struct mmc_host *host) +void mmc_power_cycle(struct mmc_host *host, u32 ocr) { mmc_power_off(host); /* Wait at least 1 ms according to SD spec */ mmc_delay(1); - mmc_power_up(host); + mmc_power_up(host, ocr); } -/* - * Cleanup when the last reference to the bus operator is dropped. - */ -static void __mmc_release_bus(struct mmc_host *host) -{ - BUG_ON(!host); - BUG_ON(host->bus_refs); - BUG_ON(!host->bus_dead); - - host->bus_ops = NULL; -} - -/* - * Increase reference count of bus operator +/** + * mmc_handle_undervoltage - Handle an undervoltage event on the MMC bus + * @host: The MMC host that detected the undervoltage condition + * + * This function is called when an undervoltage event is detected on one of + * the MMC regulators. + * + * Returns: 0 on success or a negative error code on failure. */ -static inline void mmc_bus_get(struct mmc_host *host) +int mmc_handle_undervoltage(struct mmc_host *host) { - unsigned long flags; + /* Stop the host to prevent races with card removal */ + __mmc_stop_host(host); - spin_lock_irqsave(&host->lock, flags); - host->bus_refs++; - spin_unlock_irqrestore(&host->lock, flags); -} + if (!host->bus_ops || !host->bus_ops->handle_undervoltage) + return 0; -/* - * Decrease reference count of bus operator and free it if - * it is the last reference. - */ -static inline void mmc_bus_put(struct mmc_host *host) -{ - unsigned long flags; + dev_warn(mmc_dev(host), "%s: Undervoltage detected, initiating emergency stop\n", + mmc_hostname(host)); - spin_lock_irqsave(&host->lock, flags); - host->bus_refs--; - if ((host->bus_refs == 0) && host->bus_ops) - __mmc_release_bus(host); - spin_unlock_irqrestore(&host->lock, flags); + return host->bus_ops->handle_undervoltage(host); } /* @@ -1639,23 +1427,7 @@ static inline void mmc_bus_put(struct mmc_host *host) */ void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) { - unsigned long flags; - - BUG_ON(!host); - BUG_ON(!ops); - - WARN_ON(!host->claimed); - - spin_lock_irqsave(&host->lock, flags); - - BUG_ON(host->bus_ops); - BUG_ON(host->bus_refs); - host->bus_ops = ops; - host->bus_refs = 1; - host->bus_dead = 0; - - spin_unlock_irqrestore(&host->lock, flags); } /* @@ -1663,20 +1435,21 @@ void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops) */ void mmc_detach_bus(struct mmc_host *host) { - unsigned long flags; - - BUG_ON(!host); - - WARN_ON(!host->claimed); - WARN_ON(!host->bus_ops); - - spin_lock_irqsave(&host->lock, flags); - - host->bus_dead = 1; + host->bus_ops = NULL; +} - spin_unlock_irqrestore(&host->lock, flags); +void _mmc_detect_change(struct mmc_host *host, unsigned long delay, bool cd_irq) +{ + /* + * Prevent system sleep for 5s to allow user space to consume the + * corresponding uevent. This is especially useful, when CD irq is used + * as a system wakeup, but doesn't hurt in other cases. + */ + if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL)) + __pm_wakeup_event(host->ws, 5000); - mmc_bus_put(host); + host->detect_change = 1; + mmc_schedule_delayed_work(&host->detect, delay); } /** @@ -1691,16 +1464,8 @@ void mmc_detach_bus(struct mmc_host *host) */ void mmc_detect_change(struct mmc_host *host, unsigned long delay) { -#ifdef CONFIG_MMC_DEBUG - unsigned long flags; - spin_lock_irqsave(&host->lock, flags); - WARN_ON(host->removed); - spin_unlock_irqrestore(&host->lock, flags); -#endif - host->detect_change = 1; - mmc_schedule_delayed_work(&host->detect, delay); + _mmc_detect_change(host, delay, true); } - EXPORT_SYMBOL(mmc_detect_change); void mmc_init_erase(struct mmc_card *card) @@ -1721,18 +1486,16 @@ void mmc_init_erase(struct mmc_card *card) * to that size and alignment. * * For SD cards that define Allocation Unit size, limit erases to one - * Allocation Unit at a time. For MMC cards that define High Capacity - * Erase Size, whether it is switched on or not, limit to that size. - * Otherwise just have a stab at a good value. For modern cards it - * will end up being 4MiB. Note that if the value is too small, it - * can end up taking longer to erase. + * Allocation Unit at a time. + * For MMC, have a stab at ai good value and for modern cards it will + * end up being 4MiB. Note that if the value is too small, it can end + * up taking longer to erase. Also note, erase_size is already set to + * High Capacity Erase Size if available when this function is called. */ if (mmc_card_sd(card) && card->ssr.au) { card->pref_erase = card->ssr.au; card->erase_shift = ffs(card->ssr.au) - 1; - } else if (card->ext_csd.hc_erase_size) { - card->pref_erase = card->ext_csd.hc_erase_size; - } else { + } else if (card->erase_size) { sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11; if (sz < 128) card->pref_erase = 512 * 1024 / 512; @@ -1749,7 +1512,13 @@ void mmc_init_erase(struct mmc_card *card) if (sz) card->pref_erase += card->erase_size - sz; } - } + } else + card->pref_erase = 0; +} + +static bool is_trim_arg(unsigned int arg) +{ + return (arg & MMC_TRIM_OR_DISCARD_ARGS) && arg != MMC_DISCARD_ARG; } static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, @@ -1769,14 +1538,14 @@ static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, } else { /* CSD Erase Group Size uses write timeout */ unsigned int mult = (10 << card->csd.r2w_factor); - unsigned int timeout_clks = card->csd.tacc_clks * mult; + unsigned int timeout_clks = card->csd.taac_clks * mult; unsigned int timeout_us; - /* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */ - if (card->csd.tacc_ns < 1000000) - timeout_us = (card->csd.tacc_ns * mult) / 1000; + /* Avoid overflow: e.g. taac_ns=80000000 mult=1280 */ + if (card->csd.taac_ns < 1000000) + timeout_us = (card->csd.taac_ns * mult) / 1000; else - timeout_us = (card->csd.tacc_ns / 1000) * mult; + timeout_us = (card->csd.taac_ns / 1000) * mult; /* * ios.clock is only a target. The real clock rate might be @@ -1784,7 +1553,7 @@ static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card, */ timeout_clks <<= 1; timeout_us += (timeout_clks * 1000) / - (mmc_host_clk_rate(card->host) / 1000); + (card->host->ios.clock / 1000); erase_timeout = timeout_us / 1000; @@ -1822,6 +1591,12 @@ static unsigned int mmc_sd_erase_timeout(struct mmc_card *card, { unsigned int erase_timeout; + /* for DISCARD none of the below calculation applies. + * the busy timeout is 250msec per discard command. + */ + if (arg == SD_DISCARD_ARG) + return SD_DISCARD_TIMEOUT_MS; + if (card->ssr.erase_timeout) { /* Erase timeout specified in SD Status Register (SSR) */ erase_timeout = card->ssr.erase_timeout * qty + @@ -1851,14 +1626,16 @@ static unsigned int mmc_erase_timeout(struct mmc_card *card, return mmc_mmc_erase_timeout(card, arg, qty); } -static int mmc_do_erase(struct mmc_card *card, unsigned int from, - unsigned int to, unsigned int arg) +static int mmc_do_erase(struct mmc_card *card, sector_t from, + sector_t to, unsigned int arg) { - struct mmc_command cmd = {0}; - unsigned int qty = 0; - unsigned long timeout; + struct mmc_command cmd = {}; + unsigned int qty = 0, busy_timeout = 0; + bool use_r1b_resp; int err; + mmc_retune_hold(card->host); + /* * qty is used to calculate the erase timeout which depends on how many * erase groups (or allocation units in SD terminology) are affected. @@ -1881,8 +1658,8 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from, else if (mmc_card_sd(card)) qty += to - from + 1; else - qty += ((to / card->erase_size) - - (from / card->erase_size)) + 1; + qty += (mmc_sector_div(to, card->erase_size) - + mmc_sector_div(from, card->erase_size)) + 1; if (!mmc_card_blockaddr(card)) { from <<= 9; @@ -1895,6 +1672,12 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from, cmd.opcode = MMC_ERASE_GROUP_START; cmd.arg = from; cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; + + if (mmc_card_ult_capacity(card)) { + cmd.ext_addr = from >> 32; + cmd.has_ext_addr = true; + } + err = mmc_wait_for_cmd(card->host, &cmd, 0); if (err) { pr_err("mmc_erase: group start error %d, " @@ -1910,6 +1693,12 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from, cmd.opcode = MMC_ERASE_GROUP_END; cmd.arg = to; cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; + + if (mmc_card_ult_capacity(card)) { + cmd.ext_addr = to >> 32; + cmd.has_ext_addr = true; + } + err = mmc_wait_for_cmd(card->host, &cmd, 0); if (err) { pr_err("mmc_erase: group end error %d, status %#x\n", @@ -1921,8 +1710,9 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from, memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = MMC_ERASE; cmd.arg = arg; - cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; - cmd.cmd_timeout_ms = mmc_erase_timeout(card, arg, qty); + busy_timeout = mmc_erase_timeout(card, arg, qty); + use_r1b_resp = mmc_prepare_busy_cmd(card->host, &cmd, busy_timeout); + err = mmc_wait_for_cmd(card->host, &cmd, 0); if (err) { pr_err("mmc_erase: erase error %d, status %#x\n", @@ -1934,157 +1724,195 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from, if (mmc_host_is_spi(card->host)) goto out; - timeout = jiffies + msecs_to_jiffies(MMC_CORE_TIMEOUT_MS); - do { - memset(&cmd, 0, sizeof(struct mmc_command)); - cmd.opcode = MMC_SEND_STATUS; - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; - /* Do not retry else we can't see errors */ - err = mmc_wait_for_cmd(card->host, &cmd, 0); - if (err || (cmd.resp[0] & 0xFDF92000)) { - pr_err("error %d requesting status %#x\n", - err, cmd.resp[0]); - err = -EIO; - goto out; - } + /* + * In case of when R1B + MMC_CAP_WAIT_WHILE_BUSY is used, the polling + * shall be avoided. + */ + if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) + goto out; - /* Timeout if the device never becomes ready for data and - * never leaves the program state. - */ - if (time_after(jiffies, timeout)) { - pr_err("%s: Card stuck in programming state! %s\n", - mmc_hostname(card->host), __func__); - err = -EIO; - goto out; - } + /* Let's poll to find out when the erase operation completes. */ + err = mmc_poll_for_busy(card, busy_timeout, false, MMC_BUSY_ERASE); - } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || - (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); out: + mmc_retune_release(card->host); return err; } +static unsigned int mmc_align_erase_size(struct mmc_card *card, + sector_t *from, + sector_t *to, + unsigned int nr) +{ + sector_t from_new = *from; + unsigned int nr_new = nr, rem; + + /* + * When the 'card->erase_size' is power of 2, we can use round_up/down() + * to align the erase size efficiently. + */ + if (is_power_of_2(card->erase_size)) { + sector_t temp = from_new; + + from_new = round_up(temp, card->erase_size); + rem = from_new - temp; + + if (nr_new > rem) + nr_new -= rem; + else + return 0; + + nr_new = round_down(nr_new, card->erase_size); + } else { + rem = mmc_sector_mod(from_new, card->erase_size); + if (rem) { + rem = card->erase_size - rem; + from_new += rem; + if (nr_new > rem) + nr_new -= rem; + else + return 0; + } + + rem = nr_new % card->erase_size; + if (rem) + nr_new -= rem; + } + + if (nr_new == 0) + return 0; + + *to = from_new + nr_new; + *from = from_new; + + return nr_new; +} + /** * mmc_erase - erase sectors. * @card: card to erase * @from: first sector to erase * @nr: number of sectors to erase - * @arg: erase command argument (SD supports only %MMC_ERASE_ARG) + * @arg: erase command argument * * Caller must claim host before calling this function. */ -int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, +int mmc_erase(struct mmc_card *card, sector_t from, unsigned int nr, unsigned int arg) { - unsigned int rem, to = from + nr; + unsigned int rem; + sector_t to = from + nr; - if (!(card->host->caps & MMC_CAP_ERASE) || - !(card->csd.cmdclass & CCC_ERASE)) + int err; + + if (!(card->csd.cmdclass & CCC_ERASE)) return -EOPNOTSUPP; if (!card->erase_size) return -EOPNOTSUPP; - if (mmc_card_sd(card) && arg != MMC_ERASE_ARG) + if (mmc_card_sd(card) && arg != SD_ERASE_ARG && arg != SD_DISCARD_ARG) return -EOPNOTSUPP; - if ((arg & MMC_SECURE_ARGS) && + if (mmc_card_mmc(card) && (arg & MMC_SECURE_ARGS) && !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)) return -EOPNOTSUPP; - if ((arg & MMC_TRIM_ARGS) && + if (mmc_card_mmc(card) && is_trim_arg(arg) && !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)) return -EOPNOTSUPP; if (arg == MMC_SECURE_ERASE_ARG) { - if (from % card->erase_size || nr % card->erase_size) + if (mmc_sector_mod(from, card->erase_size) || nr % card->erase_size) return -EINVAL; } - if (arg == MMC_ERASE_ARG) { - rem = from % card->erase_size; - if (rem) { - rem = card->erase_size - rem; - from += rem; - if (nr > rem) - nr -= rem; - else - return 0; - } - rem = nr % card->erase_size; - if (rem) - nr -= rem; - } + if (arg == MMC_ERASE_ARG) + nr = mmc_align_erase_size(card, &from, &to, nr); if (nr == 0) return 0; - to = from + nr; - if (to <= from) return -EINVAL; /* 'from' and 'to' are inclusive */ to -= 1; + /* + * Special case where only one erase-group fits in the timeout budget: + * If the region crosses an erase-group boundary on this particular + * case, we will be trimming more than one erase-group which, does not + * fit in the timeout budget of the controller, so we need to split it + * and call mmc_do_erase() twice if necessary. This special case is + * identified by the card->eg_boundary flag. + */ + rem = card->erase_size - mmc_sector_mod(from, card->erase_size); + if ((arg & MMC_TRIM_OR_DISCARD_ARGS) && card->eg_boundary && nr > rem) { + err = mmc_do_erase(card, from, from + rem - 1, arg); + from += rem; + if ((err) || (to <= from)) + return err; + } + return mmc_do_erase(card, from, to, arg); } EXPORT_SYMBOL(mmc_erase); -int mmc_can_erase(struct mmc_card *card) +bool mmc_card_can_erase(struct mmc_card *card) { - if ((card->host->caps & MMC_CAP_ERASE) && - (card->csd.cmdclass & CCC_ERASE) && card->erase_size) - return 1; - return 0; + return (card->csd.cmdclass & CCC_ERASE && card->erase_size); } -EXPORT_SYMBOL(mmc_can_erase); +EXPORT_SYMBOL(mmc_card_can_erase); -int mmc_can_trim(struct mmc_card *card) +bool mmc_card_can_trim(struct mmc_card *card) { - if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) - return 1; - return 0; + return ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) && + (!(card->quirks & MMC_QUIRK_TRIM_BROKEN))); } -EXPORT_SYMBOL(mmc_can_trim); +EXPORT_SYMBOL(mmc_card_can_trim); -int mmc_can_discard(struct mmc_card *card) +bool mmc_card_can_discard(struct mmc_card *card) { /* * As there's no way to detect the discard support bit at v4.5 * use the s/w feature support filed. */ - if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE) - return 1; - return 0; + return (card->ext_csd.feature_support & MMC_DISCARD_FEATURE); } -EXPORT_SYMBOL(mmc_can_discard); +EXPORT_SYMBOL(mmc_card_can_discard); -int mmc_can_sanitize(struct mmc_card *card) +bool mmc_card_can_sanitize(struct mmc_card *card) { - if (!mmc_can_trim(card) && !mmc_can_erase(card)) - return 0; + if (!mmc_card_can_trim(card) && !mmc_card_can_erase(card)) + return false; if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) - return 1; - return 0; + return true; + return false; } -EXPORT_SYMBOL(mmc_can_sanitize); -int mmc_can_secure_erase_trim(struct mmc_card *card) +bool mmc_card_can_secure_erase_trim(struct mmc_card *card) { - if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) - return 1; - return 0; + return ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) && + !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN)); } -EXPORT_SYMBOL(mmc_can_secure_erase_trim); +EXPORT_SYMBOL(mmc_card_can_secure_erase_trim); -int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, +bool mmc_card_can_cmd23(struct mmc_card *card) +{ + return ((mmc_card_mmc(card) && + card->csd.mmca_vsn >= CSD_SPEC_VER_3) || + (mmc_card_sd(card) && !mmc_card_ult_capacity(card) && + card->scr.cmds & SD_SCR_CMD23_SUPPORT)); +} +EXPORT_SYMBOL(mmc_card_can_cmd23); + +int mmc_erase_group_aligned(struct mmc_card *card, sector_t from, unsigned int nr) { if (!card->erase_size) return 0; - if (from % card->erase_size || nr % card->erase_size) + if (mmc_sector_mod(from, card->erase_size) || nr % card->erase_size) return 0; return 1; } @@ -2094,23 +1922,43 @@ static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, unsigned int arg) { struct mmc_host *host = card->host; - unsigned int max_discard, x, y, qty = 0, max_qty, timeout; + unsigned int max_discard, x, y, qty = 0, max_qty, min_qty, timeout; unsigned int last_timeout = 0; + unsigned int max_busy_timeout = host->max_busy_timeout ? + host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS; - if (card->erase_shift) + if (card->erase_shift) { max_qty = UINT_MAX >> card->erase_shift; - else if (mmc_card_sd(card)) + min_qty = card->pref_erase >> card->erase_shift; + } else if (mmc_card_sd(card)) { max_qty = UINT_MAX; - else + min_qty = card->pref_erase; + } else { max_qty = UINT_MAX / card->erase_size; + min_qty = card->pref_erase / card->erase_size; + } - /* Find the largest qty with an OK timeout */ + /* + * We should not only use 'host->max_busy_timeout' as the limitation + * when deciding the max discard sectors. We should set a balance value + * to improve the erase speed, and it can not get too long timeout at + * the same time. + * + * Here we set 'card->pref_erase' as the minimal discard sectors no + * matter what size of 'host->max_busy_timeout', but if the + * 'host->max_busy_timeout' is large enough for more discard sectors, + * then we can continue to increase the max discard sectors until we + * get a balance value. In cases when the 'host->max_busy_timeout' + * isn't specified, use the default max erase timeout. + */ do { y = 0; for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) { timeout = mmc_erase_timeout(card, arg, qty + x); - if (timeout > host->max_discard_to) + + if (qty + x > min_qty && timeout > max_busy_timeout) break; + if (timeout < last_timeout) break; last_timeout = timeout; @@ -2122,16 +1970,28 @@ static unsigned int mmc_do_calc_max_discard(struct mmc_card *card, if (!qty) return 0; + /* + * When specifying a sector range to trim, chances are we might cross + * an erase-group boundary even if the amount of sectors is less than + * one erase-group. + * If we can only fit one erase-group in the controller timeout budget, + * we have to care that erase-group boundaries are not crossed by a + * single trim operation. We flag that special case with "eg_boundary". + * In all other cases we can just decrement qty and pretend that we + * always touch (qty + 1) erase-groups as a simple optimization. + */ if (qty == 1) - return 1; + card->eg_boundary = 1; + else + qty--; /* Convert qty to sectors */ if (card->erase_shift) - max_discard = --qty << card->erase_shift; + max_discard = qty << card->erase_shift; else if (mmc_card_sd(card)) - max_discard = qty; + max_discard = qty + 1; else - max_discard = --qty * card->erase_size; + max_discard = qty * card->erase_size; return max_discard; } @@ -2141,9 +2001,6 @@ unsigned int mmc_calc_max_discard(struct mmc_card *card) struct mmc_host *host = card->host; unsigned int max_discard, max_trim; - if (!host->max_discard_to) - return UINT_MAX; - /* * Without erase_group_def set, MMC erase timeout depends on clock * frequence which can change. In that case, the best choice is @@ -2153,24 +2010,32 @@ unsigned int mmc_calc_max_discard(struct mmc_card *card) return card->pref_erase; max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG); - if (mmc_can_trim(card)) { + if (mmc_card_can_trim(card)) { max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG); - if (max_trim < max_discard) + if (max_trim < max_discard || max_discard == 0) max_discard = max_trim; } else if (max_discard < card->erase_size) { max_discard = 0; } pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n", - mmc_hostname(host), max_discard, host->max_discard_to); + mmc_hostname(host), max_discard, host->max_busy_timeout ? + host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS); return max_discard; } EXPORT_SYMBOL(mmc_calc_max_discard); +bool mmc_card_is_blockaddr(struct mmc_card *card) +{ + return card ? mmc_card_blockaddr(card) : false; +} +EXPORT_SYMBOL(mmc_card_is_blockaddr); + int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) { - struct mmc_command cmd = {0}; + struct mmc_command cmd = {}; - if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card)) + if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) || + mmc_card_hs400(card) || mmc_card_hs400es(card)) return 0; cmd.opcode = MMC_SET_BLOCKLEN; @@ -2180,117 +2045,64 @@ int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen) } EXPORT_SYMBOL(mmc_set_blocklen); -int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount, - bool is_rel_write) -{ - struct mmc_command cmd = {0}; - - cmd.opcode = MMC_SET_BLOCK_COUNT; - cmd.arg = blockcount & 0x0000FFFF; - if (is_rel_write) - cmd.arg |= 1 << 31; - cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; - return mmc_wait_for_cmd(card->host, &cmd, 5); -} -EXPORT_SYMBOL(mmc_set_blockcount); - static void mmc_hw_reset_for_init(struct mmc_host *host) { - if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) + mmc_pwrseq_reset(host); + + if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->card_hw_reset) return; - mmc_host_clk_hold(host); - host->ops->hw_reset(host); - mmc_host_clk_release(host); + host->ops->card_hw_reset(host); } -int mmc_can_reset(struct mmc_card *card) +/** + * mmc_hw_reset - reset the card in hardware + * @card: card to be reset + * + * Hard reset the card. This function is only for upper layers, like the + * block layer or card drivers. You cannot use it in host drivers (struct + * mmc_card might be gone then). + * + * Return: 0 on success, -errno on failure + */ +int mmc_hw_reset(struct mmc_card *card) { - u8 rst_n_function; + struct mmc_host *host = card->host; + int ret; - if (!mmc_card_mmc(card)) - return 0; - rst_n_function = card->ext_csd.rst_n_function; - if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED) - return 0; - return 1; + ret = host->bus_ops->hw_reset(host); + if (ret < 0) + pr_warn("%s: tried to HW reset card, got error %d\n", + mmc_hostname(host), ret); + + return ret; } -EXPORT_SYMBOL(mmc_can_reset); +EXPORT_SYMBOL(mmc_hw_reset); -static int mmc_do_hw_reset(struct mmc_host *host, int check) +int mmc_sw_reset(struct mmc_card *card) { - struct mmc_card *card = host->card; - - if (!host->bus_ops->power_restore) - return -EOPNOTSUPP; - - if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset) - return -EOPNOTSUPP; - - if (!card) - return -EINVAL; + struct mmc_host *host = card->host; + int ret; - if (!mmc_can_reset(card)) + if (!host->bus_ops->sw_reset) return -EOPNOTSUPP; - mmc_host_clk_hold(host); - mmc_set_clock(host, host->f_init); - - host->ops->hw_reset(host); - - /* If the reset has happened, then a status command will fail */ - if (check) { - struct mmc_command cmd = {0}; - int err; - - cmd.opcode = MMC_SEND_STATUS; - if (!mmc_host_is_spi(card->host)) - cmd.arg = card->rca << 16; - cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; - err = mmc_wait_for_cmd(card->host, &cmd, 0); - if (!err) { - mmc_host_clk_release(host); - return -ENOSYS; - } - } - - host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_DDR); - if (mmc_host_is_spi(host)) { - host->ios.chip_select = MMC_CS_HIGH; - host->ios.bus_mode = MMC_BUSMODE_PUSHPULL; - } else { - host->ios.chip_select = MMC_CS_DONTCARE; - host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN; - } - host->ios.bus_width = MMC_BUS_WIDTH_1; - host->ios.timing = MMC_TIMING_LEGACY; - mmc_set_ios(host); - - mmc_host_clk_release(host); - - return host->bus_ops->power_restore(host); -} - -int mmc_hw_reset(struct mmc_host *host) -{ - return mmc_do_hw_reset(host, 0); -} -EXPORT_SYMBOL(mmc_hw_reset); + ret = host->bus_ops->sw_reset(host); + if (ret) + pr_warn("%s: tried to SW reset card, got error %d\n", + mmc_hostname(host), ret); -int mmc_hw_reset_check(struct mmc_host *host) -{ - return mmc_do_hw_reset(host, 1); + return ret; } -EXPORT_SYMBOL(mmc_hw_reset_check); +EXPORT_SYMBOL(mmc_sw_reset); static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) { host->f_init = freq; -#ifdef CONFIG_MMC_DEBUG - pr_info("%s: %s: trying to init card at %u Hz\n", + pr_debug("%s: %s: trying to init card at %u Hz\n", mmc_hostname(host), __func__, host->f_init); -#endif - mmc_power_up(host); + + mmc_power_up(host, host->ocr_avail); /* * Some eMMCs (with VCCQ always on) may not be reset after power up, so @@ -2302,20 +2114,34 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq) * sdio_reset sends CMD52 to reset card. Since we do not know * if the card is being re-initialized, just send it. CMD52 * should be ignored by SD/eMMC cards. + * Skip it if we already know that we do not support SDIO commands */ - sdio_reset(host); + if (!(host->caps2 & MMC_CAP2_NO_SDIO)) + sdio_reset(host); + mmc_go_idle(host); - mmc_send_if_cond(host, host->ocr_avail); + if (!(host->caps2 & MMC_CAP2_NO_SD)) { + if (mmc_send_if_cond_pcie(host, host->ocr_avail)) + goto out; + if (mmc_card_sd_express(host)) + return 0; + } /* Order's important: probe SDIO, then SD, then MMC */ - if (!mmc_attach_sdio(host)) - return 0; - if (!mmc_attach_sd(host)) - return 0; - if (!mmc_attach_mmc(host)) - return 0; + if (!(host->caps2 & MMC_CAP2_NO_SDIO)) + if (!mmc_attach_sdio(host)) + return 0; + + if (!(host->caps2 & MMC_CAP2_NO_SD)) + if (!mmc_attach_sd(host)) + return 0; + if (!(host->caps2 & MMC_CAP2_NO_MMC)) + if (!mmc_attach_mmc(host)) + return 0; + +out: mmc_power_off(host); return -EIO; } @@ -2324,9 +2150,6 @@ int _mmc_detect_card_removed(struct mmc_host *host) { int ret; - if ((host->caps & MMC_CAP_NONREMOVABLE) || !host->bus_ops->alive) - return 0; - if (!host->card || mmc_card_removed(host->card)) return 1; @@ -2362,6 +2185,9 @@ int mmc_detect_card_removed(struct mmc_host *host) if (!card) return 1; + if (!mmc_card_is_removable(host)) + return 0; + ret = mmc_card_removed(card); /* * The card will be considered unchanged unless we have been asked to @@ -2379,7 +2205,7 @@ int mmc_detect_card_removed(struct mmc_host *host) * rescan handle the card removal. */ cancel_delayed_work(&host->detect); - mmc_detect_change(host, 0); + _mmc_detect_change(host, 0, false); } } @@ -2387,6 +2213,41 @@ int mmc_detect_card_removed(struct mmc_host *host) } EXPORT_SYMBOL(mmc_detect_card_removed); +int mmc_card_alternative_gpt_sector(struct mmc_card *card, sector_t *gpt_sector) +{ + unsigned int boot_sectors_num; + + if ((!(card->host->caps2 & MMC_CAP2_ALT_GPT_TEGRA))) + return -EOPNOTSUPP; + + /* filter out unrelated cards */ + if (card->ext_csd.rev < 3 || + !mmc_card_mmc(card) || + !mmc_card_is_blockaddr(card) || + mmc_card_is_removable(card->host)) + return -ENOENT; + + /* + * eMMC storage has two special boot partitions in addition to the + * main one. NVIDIA's bootloader linearizes eMMC boot0->boot1->main + * accesses, this means that the partition table addresses are shifted + * by the size of boot partitions. In accordance with the eMMC + * specification, the boot partition size is calculated as follows: + * + * boot partition size = 128K byte x BOOT_SIZE_MULT + * + * Calculate number of sectors occupied by the both boot partitions. + */ + boot_sectors_num = card->ext_csd.raw_boot_mult * SZ_128K / + SZ_512 * MMC_NUM_BOOT_PARTITION; + + /* Defined by NVIDIA and used by Android devices. */ + *gpt_sector = card->ext_csd.sectors - boot_sectors_num - 1; + + return 0; +} +EXPORT_SYMBOL(mmc_card_alternative_gpt_sector); + void mmc_rescan(struct work_struct *work) { struct mmc_host *host = @@ -2397,55 +2258,76 @@ void mmc_rescan(struct work_struct *work) return; /* If there is a non-removable card registered, only scan once */ - if ((host->caps & MMC_CAP_NONREMOVABLE) && host->rescan_entered) + if (!mmc_card_is_removable(host) && host->rescan_entered) return; host->rescan_entered = 1; - mmc_bus_get(host); + if (host->trigger_card_event && host->ops->card_event) { + mmc_claim_host(host); + host->ops->card_event(host); + mmc_release_host(host); + host->trigger_card_event = false; + } - /* - * if there is a _removable_ card registered, check whether it is - * still present - */ - if (host->bus_ops && host->bus_ops->detect && !host->bus_dead - && !(host->caps & MMC_CAP_NONREMOVABLE)) + /* Verify a registered card to be functional, else remove it. */ + if (host->bus_ops) host->bus_ops->detect(host); host->detect_change = 0; - /* - * Let mmc_bus_put() free the bus/bus_ops if we've found that - * the card is no longer present. - */ - mmc_bus_put(host); - mmc_bus_get(host); - /* if there still is a card present, stop here */ - if (host->bus_ops != NULL) { - mmc_bus_put(host); + if (host->bus_ops != NULL) + goto out; + + mmc_claim_host(host); + if (mmc_card_is_removable(host) && host->ops->get_cd && + host->ops->get_cd(host) == 0) { + mmc_power_off(host); + mmc_release_host(host); + goto out; + } + + /* If an SD express card is present, then leave it as is. */ + if (mmc_card_sd_express(host)) { + mmc_release_host(host); goto out; } /* - * Only we can add a new handler, so it's safe to - * release the lock here. + * Ideally we should favor initialization of legacy SD cards and defer + * UHS-II enumeration. However, it seems like cards doesn't reliably + * announce their support for UHS-II in the response to the ACMD41, + * while initializing the legacy SD interface. Therefore, let's start + * with UHS-II for now. */ - mmc_bus_put(host); - - if (host->ops->get_cd && host->ops->get_cd(host) == 0) { - mmc_claim_host(host); - mmc_power_off(host); + if (!mmc_attach_sd_uhs2(host)) { mmc_release_host(host); goto out; } - mmc_claim_host(host); for (i = 0; i < ARRAY_SIZE(freqs); i++) { - if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) + unsigned int freq = freqs[i]; + if (freq > host->f_max) { + if (i + 1 < ARRAY_SIZE(freqs)) + continue; + freq = host->f_max; + } + if (!mmc_rescan_try_freq(host, max(freq, host->f_min))) break; if (freqs[i] <= host->f_min) break; } + + /* A non-removable card should have been detected by now. */ + if (!mmc_card_is_removable(host) && !host->bus_ops) + pr_info("%s: Failed to initialize a non-removable card", + mmc_hostname(host)); + + /* + * Ignore the command timeout errors observed during + * the card init as those are excepted. + */ + host->err_stats[MMC_ERR_CMD_TIMEOUT] = 0; mmc_release_host(host); out: @@ -2455,267 +2337,65 @@ void mmc_rescan(struct work_struct *work) void mmc_start_host(struct mmc_host *host) { - host->f_init = max(freqs[0], host->f_min); - host->rescan_disable = 0; - if (host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP) - mmc_power_off(host); - else - mmc_power_up(host); - mmc_detect_change(host, 0); -} - -void mmc_stop_host(struct mmc_host *host) -{ -#ifdef CONFIG_MMC_DEBUG - unsigned long flags; - spin_lock_irqsave(&host->lock, flags); - host->removed = 1; - spin_unlock_irqrestore(&host->lock, flags); -#endif - - host->rescan_disable = 1; - cancel_delayed_work_sync(&host->detect); - mmc_flush_scheduled_work(); + bool power_up = !(host->caps2 & + (MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_SD_UHS2)); - /* clear pm flags now and let card drivers set them as needed */ - host->pm_flags = 0; + host->f_init = max(min(freqs[0], host->f_max), host->f_min); + host->rescan_disable = 0; - mmc_bus_get(host); - if (host->bus_ops && !host->bus_dead) { - /* Calling bus_ops->remove() with a claimed host can deadlock */ - host->bus_ops->remove(host); + if (power_up) { mmc_claim_host(host); - mmc_detach_bus(host); - mmc_power_off(host); + mmc_power_up(host, host->ocr_avail); mmc_release_host(host); - mmc_bus_put(host); - return; } - mmc_bus_put(host); - - BUG_ON(host->card); - mmc_power_off(host); + mmc_gpiod_request_cd_irq(host); + _mmc_detect_change(host, 0, false); } -int mmc_power_save_host(struct mmc_host *host) +void __mmc_stop_host(struct mmc_host *host) { - int ret = 0; - -#ifdef CONFIG_MMC_DEBUG - pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__); -#endif - - mmc_bus_get(host); - - if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { - mmc_bus_put(host); - return -EINVAL; - } - - if (host->bus_ops->power_save) - ret = host->bus_ops->power_save(host); - - mmc_bus_put(host); - - mmc_power_off(host); - - return ret; -} -EXPORT_SYMBOL(mmc_power_save_host); - -int mmc_power_restore_host(struct mmc_host *host) -{ - int ret; - -#ifdef CONFIG_MMC_DEBUG - pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__); -#endif - - mmc_bus_get(host); - - if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) { - mmc_bus_put(host); - return -EINVAL; - } - - mmc_power_up(host); - ret = host->bus_ops->power_restore(host); - - mmc_bus_put(host); - - return ret; -} -EXPORT_SYMBOL(mmc_power_restore_host); - -/* - * Flush the cache to the non-volatile storage. - */ -int mmc_flush_cache(struct mmc_card *card) -{ - struct mmc_host *host = card->host; - int err = 0; - - if (!(host->caps2 & MMC_CAP2_CACHE_CTRL)) - return err; - - if (mmc_card_mmc(card) && - (card->ext_csd.cache_size > 0) && - (card->ext_csd.cache_ctrl & 1)) { - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_FLUSH_CACHE, 1, 0); - if (err) - pr_err("%s: cache flush error %d\n", - mmc_hostname(card->host), err); - } - - return err; -} -EXPORT_SYMBOL(mmc_flush_cache); - -/* - * Turn the cache ON/OFF. - * Turning the cache OFF shall trigger flushing of the data - * to the non-volatile storage. - * This function should be called with host claimed - */ -int mmc_cache_ctrl(struct mmc_host *host, u8 enable) -{ - struct mmc_card *card = host->card; - unsigned int timeout; - int err = 0; - - if (!(host->caps2 & MMC_CAP2_CACHE_CTRL) || - mmc_card_is_removable(host)) - return err; + if (host->rescan_disable) + return; - if (card && mmc_card_mmc(card) && - (card->ext_csd.cache_size > 0)) { - enable = !!enable; - - if (card->ext_csd.cache_ctrl ^ enable) { - timeout = enable ? card->ext_csd.generic_cmd6_time : 0; - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_CACHE_CTRL, enable, timeout); - if (err) - pr_err("%s: cache %s error %d\n", - mmc_hostname(card->host), - enable ? "on" : "off", - err); - else - card->ext_csd.cache_ctrl = enable; - } + if (host->slot.cd_irq >= 0) { + mmc_gpio_set_cd_wake(host, false); + disable_irq(host->slot.cd_irq); } - return err; -} -EXPORT_SYMBOL(mmc_cache_ctrl); - -#ifdef CONFIG_PM - -/** - * mmc_suspend_host - suspend a host - * @host: mmc host - */ -int mmc_suspend_host(struct mmc_host *host) -{ - /* This function is deprecated */ - return 0; -} -EXPORT_SYMBOL(mmc_suspend_host); - -/** - * mmc_resume_host - resume a previously suspended host - * @host: mmc host - */ -int mmc_resume_host(struct mmc_host *host) -{ - /* This function is deprecated */ - return 0; + host->rescan_disable = 1; + cancel_delayed_work_sync(&host->detect); } -EXPORT_SYMBOL(mmc_resume_host); -/* Do the card removal on suspend if card is assumed removeable - * Do that in pm notifier while userspace isn't yet frozen, so we will be able - to sync the card. -*/ -int mmc_pm_notify(struct notifier_block *notify_block, - unsigned long mode, void *unused) +void mmc_stop_host(struct mmc_host *host) { - struct mmc_host *host = container_of( - notify_block, struct mmc_host, pm_notify); - unsigned long flags; - int err = 0; + __mmc_stop_host(host); - switch (mode) { - case PM_HIBERNATION_PREPARE: - case PM_SUSPEND_PREPARE: - spin_lock_irqsave(&host->lock, flags); - host->rescan_disable = 1; - spin_unlock_irqrestore(&host->lock, flags); - cancel_delayed_work_sync(&host->detect); - - if (!host->bus_ops) - break; - - /* Validate prerequisites for suspend */ - if (host->bus_ops->pre_suspend) - err = host->bus_ops->pre_suspend(host); - if (!err && host->bus_ops->suspend) - break; + /* clear pm flags now and let card drivers set them as needed */ + host->pm_flags = 0; + if (host->bus_ops) { /* Calling bus_ops->remove() with a claimed host can deadlock */ host->bus_ops->remove(host); mmc_claim_host(host); mmc_detach_bus(host); mmc_power_off(host); mmc_release_host(host); - host->pm_flags = 0; - break; - - case PM_POST_SUSPEND: - case PM_POST_HIBERNATION: - case PM_POST_RESTORE: - - spin_lock_irqsave(&host->lock, flags); - host->rescan_disable = 0; - spin_unlock_irqrestore(&host->lock, flags); - mmc_detect_change(host, 0); - + return; } - return 0; -} -#endif - -/** - * mmc_init_context_info() - init synchronization context - * @host: mmc host - * - * Init struct context_info needed to implement asynchronous - * request mechanism, used by mmc core, host driver and mmc requests - * supplier. - */ -void mmc_init_context_info(struct mmc_host *host) -{ - spin_lock_init(&host->context_info.lock); - host->context_info.is_new_req = false; - host->context_info.is_done_rcv = false; - host->context_info.is_waiting_last_req = false; - init_waitqueue_head(&host->context_info.wait); + mmc_claim_host(host); + mmc_power_off(host); + mmc_release_host(host); } static int __init mmc_init(void) { int ret; - workqueue = alloc_ordered_workqueue("kmmcd", 0); - if (!workqueue) - return -ENOMEM; - ret = mmc_register_bus(); if (ret) - goto destroy_workqueue; + return ret; ret = mmc_register_host_class(); if (ret) @@ -2731,9 +2411,6 @@ unregister_host_class: mmc_unregister_host_class(); unregister_bus: mmc_unregister_bus(); -destroy_workqueue: - destroy_workqueue(workqueue); - return ret; } @@ -2742,10 +2419,10 @@ static void __exit mmc_exit(void) sdio_unregister_bus(); mmc_unregister_host_class(); mmc_unregister_bus(); - destroy_workqueue(workqueue); } subsys_initcall(mmc_init); module_exit(mmc_exit); +MODULE_DESCRIPTION("MMC core driver"); MODULE_LICENSE("GPL"); |