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Date: Thu, 3 May 2012 19:53:06 +0530 From: Venkatraman S <svenkatr@...com> To: <linux-mmc@...r.kernel.org>, <cjb@...top.org>, <linux-mm@...ck.org>, <linux-fsdevel@...r.kernel.org>, <linux-omap@...r.kernel.org> CC: <linux-kernel@...r.kernel.org>, <arnd.bergmann@...aro.org>, <alex.lemberg@...disk.com>, <ilan.smith@...disk.com>, <lporzio@...ron.com>, <rmk+kernel@....linux.org.uk>, Venkatraman S <svenkatr@...com> Subject: [PATCH v2 07/16] mmc: core: helper function for finding preemptible command 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 <svenkatr@...com> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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