[PATCH v2 08/16] mmc: core: add preemptibility tracking fields to mmc command
From: Venkatraman S <hidden>
Date: 2012-05-03 14:23:07
Also in:
linux-fsdevel, linux-mmc, linux-omap, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, the rest · Maintainers:
Ulf Hansson, Linus Torvalds
Set a preemptibility command atrribute to MMC commands. This can be later used by write (multi block), trim etc for evaluating if a HPI is applicable. Note the starting time of executing a command so a decision can be made if it is too late for preemption. Signed-off-by: Venkatraman S <redacted> --- drivers/mmc/core/core.c | 5 +++++ include/linux/mmc/core.h | 4 ++++ 2 files changed, 9 insertions(+)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index c4cd6fb..b4152ca 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c@@ -258,6 +258,11 @@ static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq) complete(&mrq->completion); return -ENOMEDIUM; } + if (mmc_is_preemptible_command(mrq->cmd)) + mrq->cmd->cmd_attr |= MMC_CMD_PREEMPTIBLE; + else + mrq->cmd->cmd_attr &= ~MMC_CMD_PREEMPTIBLE; + mrq->cmd->started_time = jiffies; mmc_start_request(host, mrq); return 0; }
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 680e256..d86144e 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h@@ -76,6 +76,10 @@ struct mmc_command { */ #define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK) + unsigned int cmd_attr; /*Runtime attributes of the command */ +#define MMC_CMD_PREEMPTIBLE BIT(0) +#define MMC_CMD_PREEMPTED BIT(1) + unsigned long started_time; unsigned int retries; /* max number of retries */ unsigned int error; /* command error */
--
1.7.10.rc2
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