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mmc: block: Add timeout_clks when calculating timeout

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According to the specification, total access time is derived from both TAAC
and NSAC, which means the timeout should add both timeout_ns and
timeout_clks. Host drivers do that, so make the block driver do that too.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Adrian Hunter 2017-11-29 15:41:13 +02:00 committed by Ulf Hansson
parent 0987c6b046
commit 92c0a0cc94
1 changed files with 35 additions and 7 deletions
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42
drivers/mmc/core/block.c
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@ -922,6 +922,34 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
return 0;
}
static unsigned int mmc_blk_clock_khz(struct mmc_host *host)
{
if (host->actual_clock)
return host->actual_clock / 1000;
/* Clock may be subject to a divisor, fudge it by a factor of 2. */
if (host->ios.clock)
return host->ios.clock / 2000;
/* How can there be no clock */
WARN_ON_ONCE(1);
return 100; /* 100 kHz is minimum possible value */
}
static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host,
struct mmc_data *data)
{
unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000);
unsigned int khz;
if (data->timeout_clks) {
khz = mmc_blk_clock_khz(host);
ms += DIV_ROUND_UP(data->timeout_clks, khz);
}
return ms;
}
static inline bool mmc_blk_in_tran_state(u32 status)
{
/*
@ -1169,9 +1197,10 @@ static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
*/
if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
R1_CURRENT_STATE(status) == R1_STATE_RCV) {
err = send_stop(card,
DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
req, gen_err, &stop_status);
unsigned int timeout;
timeout = mmc_blk_data_timeout_ms(card->host, &brq->data);
err = send_stop(card, timeout, req, gen_err, &stop_status);
if (err) {
pr_err("%s: error %d sending stop command\n",
req->rq_disk->disk_name, err);
@ -1977,6 +2006,7 @@ static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req)
struct mmc_host *host = card->host;
blk_status_t error = BLK_STS_OK;
int retries = 0;
unsigned int timeout = mmc_blk_data_timeout_ms(host, mrq->data);
do {
u32 status;
@ -1995,10 +2025,8 @@ static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req)
u32 stop_status = 0;
bool gen_err = false;
err = send_stop(card,
DIV_ROUND_UP(mrq->data->timeout_ns,
1000000),
req, &gen_err, &stop_status);
err = send_stop(card, timeout, req, &gen_err,
&stop_status);
if (err)
goto error_exit;
}