mmc: core: expose HPI capability to SWITCH commands
Some of the time consuming operations such as BKOPS, SANITIZE, CACHE
flush/off use the SWITCH command (CMD6) but as these operations don't
have card specification defined timeout for completion, we may see
timeout errors if card doesn't complete the operation within the SW
defined timeout. If SW defined timeout is hit, above operations are
considered to be failed and no real recovery mechanism is implemented
after timeout.
Most of the above operations (BKOPS/SANITIZE/CACHE flush/off) can be
interrupted by sending the HPI (High Priority Interrupt) command to card
if they taking longer than expected. This change adds the base support
which will these operations to be HPIed after timeout.
Change-Id: Ibd9061525756aaae656b1ceeeaed62e04fb80cce
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index f548721..e62305d 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -99,8 +99,9 @@
*/
unsigned int cmd_timeout_ms; /* in milliseconds */
- /* Set this flag only for blocking bkops request */
bool bkops_busy;
+ /* Set this flag only for commands which can be HPIed */
+ bool ignore_timeout;
struct mmc_data *data; /* data segment associated with cmd */
struct mmc_request *mrq; /* associated request */
@@ -162,6 +163,8 @@
extern int __mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int, bool,
bool);
extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
+extern int mmc_switch_ignore_timeout(struct mmc_card *, u8, u8, u8,
+ unsigned int);
extern int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
#define MMC_ERASE_ARG 0x00000000