From: Ulf Hansson <ulf.hansson@linaro.org>
To: linux-mmc@vger.kernel.org, Ulf Hansson <ulf.hansson@linaro.org>,
Adrian Hunter <adrian.hunter@intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
Shawn Lin <shawn.lin@rock-chips.com>,
Avri Altman <avri.altman@wdc.com>,
Masami Hiramatsu <masami.hiramatsu@linaro.org>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 04/11] mmc: core: Extend re-use of __mmc_poll_for_busy()
Date: Tue, 4 May 2021 18:12:15 +0200 [thread overview]
Message-ID: <20210504161222.101536-5-ulf.hansson@linaro.org> (raw)
In-Reply-To: <20210504161222.101536-1-ulf.hansson@linaro.org>
Via __mmc_poll_for_busy() we end up polling with the ->card_busy() host ops
or by sending the CMD13. To allow polling of different types, which is
needed to support a few new SD card features, let's rework the code around
__mmc_poll_for_busy() to make it more generic.
More precisely, let __mmc_poll_for_busy() take a pointer to a callback
function as in-parameter, which it calls to poll for busy state completion.
Additionally, let's share __mmc_poll_for_busy() to allow it to be re-used
outside of mmc_ops.c. Subsequent changes will make use of it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
drivers/mmc/core/core.c | 2 +-
drivers/mmc/core/mmc_ops.c | 42 ++++++++++++++++++++++++--------------
drivers/mmc/core/mmc_ops.h | 5 ++++-
3 files changed, 32 insertions(+), 17 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b00c84ea8441..b039dcff17f8 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1671,7 +1671,7 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from,
goto out;
/* Let's poll to find out when the erase operation completes. */
- err = mmc_poll_for_busy(card, busy_timeout, MMC_BUSY_ERASE);
+ err = mmc_poll_for_busy(card, busy_timeout, false, MMC_BUSY_ERASE);
out:
mmc_retune_release(card->host);
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index ccaee1cb7ff5..653627fe02a3 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -53,6 +53,12 @@ static const u8 tuning_blk_pattern_8bit[] = {
0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
};
+struct mmc_busy_data {
+ struct mmc_card *card;
+ bool retry_crc_err;
+ enum mmc_busy_cmd busy_cmd;
+};
+
int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries)
{
int err;
@@ -424,10 +430,10 @@ int mmc_switch_status(struct mmc_card *card, bool crc_err_fatal)
return mmc_switch_status_error(card->host, status);
}
-static int mmc_busy_status(struct mmc_card *card, bool retry_crc_err,
- enum mmc_busy_cmd busy_cmd, bool *busy)
+static int mmc_busy_cb(void *cb_data, bool *busy)
{
- struct mmc_host *host = card->host;
+ struct mmc_busy_data *data = cb_data;
+ struct mmc_host *host = data->card->host;
u32 status = 0;
int err;
@@ -436,17 +442,17 @@ static int mmc_busy_status(struct mmc_card *card, bool retry_crc_err,
return 0;
}
- err = mmc_send_status(card, &status);
- if (retry_crc_err && err == -EILSEQ) {
+ err = mmc_send_status(data->card, &status);
+ if (data->retry_crc_err && err == -EILSEQ) {
*busy = true;
return 0;
}
if (err)
return err;
- switch (busy_cmd) {
+ switch (data->busy_cmd) {
case MMC_BUSY_CMD6:
- err = mmc_switch_status_error(card->host, status);
+ err = mmc_switch_status_error(host, status);
break;
case MMC_BUSY_ERASE:
err = R1_STATUS(status) ? -EIO : 0;
@@ -464,8 +470,9 @@ static int mmc_busy_status(struct mmc_card *card, bool retry_crc_err,
return 0;
}
-static int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
- bool retry_crc_err, enum mmc_busy_cmd busy_cmd)
+int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
+ int (*busy_cb)(void *cb_data, bool *busy),
+ void *cb_data)
{
struct mmc_host *host = card->host;
int err;
@@ -482,7 +489,7 @@ static int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
*/
expired = time_after(jiffies, timeout);
- err = mmc_busy_status(card, retry_crc_err, busy_cmd, &busy);
+ err = (*busy_cb)(cb_data, &busy);
if (err)
return err;
@@ -505,9 +512,15 @@ static int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
}
int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
- enum mmc_busy_cmd busy_cmd)
+ bool retry_crc_err, enum mmc_busy_cmd busy_cmd)
{
- return __mmc_poll_for_busy(card, timeout_ms, false, busy_cmd);
+ struct mmc_busy_data cb_data;
+
+ cb_data.card = card;
+ cb_data.retry_crc_err = retry_crc_err;
+ cb_data.busy_cmd = busy_cmd;
+
+ return __mmc_poll_for_busy(card, timeout_ms, &mmc_busy_cb, &cb_data);
}
bool mmc_prepare_busy_cmd(struct mmc_host *host, struct mmc_command *cmd,
@@ -591,8 +604,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
}
/* Let's try to poll to find out when the command is completed. */
- err = __mmc_poll_for_busy(card, timeout_ms, retry_crc_err,
- MMC_BUSY_CMD6);
+ err = mmc_poll_for_busy(card, timeout_ms, retry_crc_err, MMC_BUSY_CMD6);
if (err)
goto out;
@@ -840,7 +852,7 @@ static int mmc_send_hpi_cmd(struct mmc_card *card)
return 0;
/* Let's poll to find out when the HPI request completes. */
- return mmc_poll_for_busy(card, busy_timeout_ms, MMC_BUSY_HPI);
+ return mmc_poll_for_busy(card, busy_timeout_ms, false, MMC_BUSY_HPI);
}
/**
diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
index ba898c435658..aca66c128804 100644
--- a/drivers/mmc/core/mmc_ops.h
+++ b/drivers/mmc/core/mmc_ops.h
@@ -38,8 +38,11 @@ int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
int mmc_switch_status(struct mmc_card *card, bool crc_err_fatal);
bool mmc_prepare_busy_cmd(struct mmc_host *host, struct mmc_command *cmd,
unsigned int timeout_ms);
+int __mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
+ int (*busy_cb)(void *cb_data, bool *busy),
+ void *cb_data);
int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
- enum mmc_busy_cmd busy_cmd);
+ bool retry_crc_err, enum mmc_busy_cmd busy_cmd);
int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
unsigned int timeout_ms, unsigned char timing,
bool send_status, bool retry_crc_err, unsigned int retries);
--
2.25.1
next prev parent reply other threads:[~2021-05-04 16:12 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-04 16:12 [PATCH 00/11] Initital support for new power/perf features for SD cards Ulf Hansson
2021-05-04 16:12 ` [PATCH 01/11] mmc: core: Drop open coding when preparing commands with busy signaling Ulf Hansson
2021-05-06 12:50 ` Linus Walleij
2021-05-07 1:42 ` Shawn Lin
2021-05-04 16:12 ` [PATCH 02/11] mmc: core: Take into account MMC_CAP_NEED_RSP_BUSY for eMMC HPI commands Ulf Hansson
2021-05-06 12:51 ` Linus Walleij
2021-05-07 1:44 ` Shawn Lin
2021-05-04 16:12 ` [PATCH 03/11] mmc: core: Re-structure some code in __mmc_poll_for_busy() Ulf Hansson
2021-05-06 12:52 ` Linus Walleij
2021-05-07 1:48 ` Shawn Lin
2021-05-04 16:12 ` Ulf Hansson [this message]
2021-05-06 12:53 ` [PATCH 04/11] mmc: core: Extend re-use of __mmc_poll_for_busy() Linus Walleij
2021-05-07 1:51 ` Shawn Lin
2021-05-04 16:12 ` [PATCH 05/11] mmc: core: Enable eMMC sleep commands to use HW busy polling Ulf Hansson
2021-05-06 12:55 ` Linus Walleij
2021-05-07 1:52 ` Shawn Lin
2021-05-04 16:12 ` [PATCH 06/11] mmc: core: Prepare mmc_send_cxd_data() to be re-used for additional cmds Ulf Hansson
2021-05-06 12:56 ` Linus Walleij
2021-05-06 13:00 ` Linus Walleij
2021-05-07 7:30 ` Ulf Hansson
2021-05-07 1:53 ` Shawn Lin
2021-05-04 16:12 ` [PATCH 07/11] mmc: core: Drop open coding in mmc_sd_switch() Ulf Hansson
2021-05-06 12:57 ` Linus Walleij
2021-05-07 1:54 ` Shawn Lin
2021-05-04 16:12 ` [PATCH 08/11] mmc: core: Parse the SD SCR register for support of CMD48/49 and CMD58/59 Ulf Hansson
2021-05-06 13:01 ` Linus Walleij
2021-05-07 1:58 ` Shawn Lin
2021-05-04 16:12 ` [PATCH 09/11] mmc: core: Read the SD function extension registers for power management Ulf Hansson
2021-05-06 13:04 ` Linus Walleij
2021-05-07 2:06 ` Shawn Lin
2021-05-07 7:27 ` Ulf Hansson
2021-05-07 7:48 ` Shawn Lin
2021-05-07 11:36 ` Ulf Hansson
2021-05-04 16:12 ` [PATCH 10/11] mmc: core: Read performance enhancements registers for SD cards Ulf Hansson
2021-05-06 13:05 ` Linus Walleij
2021-05-04 16:12 ` [PATCH 11/11] mmc: core: Add support for Power Off Notification " Ulf Hansson
2021-05-06 13:07 ` Linus Walleij
2021-05-07 6:44 ` [PATCH 00/11] Initital support for new power/perf features " Avri Altman
2021-05-07 7:31 ` Ulf Hansson
2021-05-11 10:56 ` Ulf Hansson
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