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mmc: host: Add CQE interface

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Add CQE host operations, capabilities, and host members.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2017-08-25 15:43:46 +03:00 committed by Ulf Hansson
parent d2f82254e4
commit d3bf68ae04
2 changed files with 59 additions and 0 deletions
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6
include/linux/mmc/core.h
View File

@ -156,6 +156,12 @@ struct mmc_request {
struct completion completion;
struct completion cmd_completion;
void (*done)(struct mmc_request *);/* completion function */
/*
* Notify uppers layers (e.g. mmc block driver) that recovery is needed
* due to an error associated with the mmc_request. Currently used only
* by CQE.
*/
void (*recovery_notifier)(struct mmc_request *);
struct mmc_host *host;
/* Allow other commands during this ongoing data transfer or busy wait */

53
include/linux/mmc/host.h
View File

@ -162,6 +162,50 @@ struct mmc_host_ops {
unsigned int direction, int blk_size);
};
struct mmc_cqe_ops {
/* Allocate resources, and make the CQE operational */
int (*cqe_enable)(struct mmc_host *host, struct mmc_card *card);
/* Free resources, and make the CQE non-operational */
void (*cqe_disable)(struct mmc_host *host);
/*
* Issue a read, write or DCMD request to the CQE. Also deal with the
* effect of ->cqe_off().
*/
int (*cqe_request)(struct mmc_host *host, struct mmc_request *mrq);
/* Free resources (e.g. DMA mapping) associated with the request */
void (*cqe_post_req)(struct mmc_host *host, struct mmc_request *mrq);
/*
* Prepare the CQE and host controller to accept non-CQ commands. There
* is no corresponding ->cqe_on(), instead ->cqe_request() is required
* to deal with that.
*/
void (*cqe_off)(struct mmc_host *host);
/*
* Wait for all CQE tasks to complete. Return an error if recovery
* becomes necessary.
*/
int (*cqe_wait_for_idle)(struct mmc_host *host);
/*
* Notify CQE that a request has timed out. Return false if the request
* completed or true if a timeout happened in which case indicate if
* recovery is needed.
*/
bool (*cqe_timeout)(struct mmc_host *host, struct mmc_request *mrq,
bool *recovery_needed);
/*
* Stop all CQE activity and prepare the CQE and host controller to
* accept recovery commands.
*/
void (*cqe_recovery_start)(struct mmc_host *host);
/*
* Clear the queue and call mmc_cqe_request_done() on all requests.
* Requests that errored will have the error set on the mmc_request
* (data->error or cmd->error for DCMD). Requests that did not error
* will have zero data bytes transferred.
*/
void (*cqe_recovery_finish)(struct mmc_host *host);
};
struct mmc_async_req {
/* active mmc request */
struct mmc_request *mrq;
@ -303,6 +347,8 @@ struct mmc_host {
#define MMC_CAP2_HS400_ES (1 << 20) /* Host supports enhanced strobe */
#define MMC_CAP2_NO_SD (1 << 21) /* Do not send SD commands during initialization */
#define MMC_CAP2_NO_MMC (1 << 22) /* Do not send (e)MMC commands during initialization */
#define MMC_CAP2_CQE (1 << 23) /* Has eMMC command queue engine */
#define MMC_CAP2_CQE_DCMD (1 << 24) /* CQE can issue a direct command */
mmc_pm_flag_t pm_caps; /* supported pm features */
@ -386,6 +432,13 @@ struct mmc_host {
int dsr_req; /* DSR value is valid */
u32 dsr; /* optional driver stage (DSR) value */
/* Command Queue Engine (CQE) support */
const struct mmc_cqe_ops *cqe_ops;
void *cqe_private;
int cqe_qdepth;
bool cqe_enabled;
bool cqe_on;
unsigned long private[0] ____cacheline_aligned;
};