On Wed, 14 Aug 2024 at 09:31, Avri Altman <avri.altman@xxxxxxx> wrote:
>
> In Multi-Block read/write, CMD23 must precede CMD22. Therefore always
> use manual cmd23 so that we'll be able to control the sequence of
> commands. Also, add an applicable mmc_command member for both
> mmc_blk_request and mmc_request to accommodate the address extension
> command.
>
> Tested-by: Ricky WU <ricky_wu@xxxxxxxxxxx>
> Signed-off-by: Avri Altman <avri.altman@xxxxxxx>
> ---
> drivers/mmc/core/queue.h | 1 +
> drivers/mmc/host/sdhci.c | 4 ++--
> include/linux/mmc/core.h | 1 +
> 3 files changed, 4 insertions(+), 2 deletions(-)
Please split this up. The core changes certainly don't need to be
mixed with changes to sdhci.
>
> diff --git a/drivers/mmc/core/queue.h b/drivers/mmc/core/queue.h
> index 1498840a4ea0..7e191d7f0461 100644
> --- a/drivers/mmc/core/queue.h
> +++ b/drivers/mmc/core/queue.h
> @@ -40,6 +40,7 @@ struct mmc_blk_ioc_data;
> struct mmc_blk_request {
> struct mmc_request mrq;
> struct mmc_command sbc;
> + struct mmc_command ext;
> struct mmc_command cmd;
> struct mmc_command stop;
> struct mmc_data data;
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 4b91c9e96635..f62b489c9e9c 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1399,13 +1399,13 @@ static inline bool sdhci_auto_cmd12(struct sdhci_host *host,
> static inline bool sdhci_auto_cmd23(struct sdhci_host *host,
> struct mmc_request *mrq)
> {
> - return mrq->sbc && (host->flags & SDHCI_AUTO_CMD23);
> + return mrq->sbc && (host->flags & SDHCI_AUTO_CMD23) && !mrq->ext;
> }
>
> static inline bool sdhci_manual_cmd23(struct sdhci_host *host,
> struct mmc_request *mrq)
> {
> - return mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23);
> + return mrq->sbc && (mrq->ext || !(host->flags & SDHCI_AUTO_CMD23));
> }
I am a bit worried to see that we are going to need updates in host
drivers too, to support CMD22 and SDUC cards. But if that's the case,
so be it.
In any case, at least some more information about why this approach is
needed would be nice.
>
> static inline void sdhci_auto_cmd_select(struct sdhci_host *host,
> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
> index 2c7928a50907..5560e70cb8d4 100644
> --- a/include/linux/mmc/core.h
> +++ b/include/linux/mmc/core.h
> @@ -142,6 +142,7 @@ struct mmc_data {
> struct mmc_host;
> struct mmc_request {
> struct mmc_command *sbc; /* SET_BLOCK_COUNT for multiblock */
> + struct mmc_command *ext; /* SD_ADDR_EXT for SDUC */
> struct mmc_command *cmd;
> struct mmc_data *data;
> struct mmc_command *stop;
> --
> 2.25.1
>
Kind regards
Uffe
