[PATCH v2 07/16] mmc: core: helper function for finding preemptible command
From: Venkatraman S <hidden>
Date: 2012-05-03 14:23:06
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
According to table30 in eMMC spec, only some commands can be preempted by foreground HPI. Provide a helper function for the HPI procedure to identify if the command is preemptible. Signed-off-by: Venkatraman S <redacted> --- include/linux/mmc/core.h | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 1b431c7..680e256 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h@@ -10,6 +10,7 @@ #include <linux/interrupt.h> #include <linux/completion.h> +#include <linux/mmc/mmc.h> struct request; struct mmc_data;
@@ -192,6 +193,18 @@ static inline void mmc_claim_host(struct mmc_host *host) __mmc_claim_host(host, NULL); } +static inline bool mmc_is_preemptible_command(struct mmc_command *cmd) +{ + if ((cmd->opcode == MMC_SWITCH && (cmd->arg == EXT_CSD_BKOPS_START || + cmd->arg == EXT_CSD_SANITIZE_START || + cmd->arg == EXT_CSD_FLUSH_CACHE)) + || (cmd->opcode == MMC_ERASE) + || (cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK) + || (cmd->opcode == MMC_WRITE_BLOCK)) + return true; + return false; +} + extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max); #endif /* LINUX_MMC_CORE_H */
--
1.7.10.rc2
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