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    Subject[PATCH v2 07/16] mmc: core: helper function for finding preemptible command
    Date
    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@ti.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


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