mmc: support packed write command for eMMC4.5 device
This patch supports packed write command of eMMC4.5 device.
Several writes can be grouped in packed command and all data
of the individual commands can be sent in a single transfer
on the bus.
[tlinder@codeaurora.org: Difference in definition:
R1_EXP_EVENT -- > R1_EXCEPTION_EVENT]
(cherry picked from commit 53f8f574c6c68687098cd064af8224da44de2484)
Change-Id: I26ee7c0b957a3aec5e4ffc6d6df806ea38435784
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Reviewed-by: Maya Erez <merez@codeaurora.org>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
(cherry picked from commit 6d24bc3b6e86412cbfbc37377bbbf196cbdebce9)
diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index d2a1eb4..5e04938 100644
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -12,6 +12,11 @@
struct mmc_data data;
};
+enum mmc_packed_cmd {
+ MMC_PACKED_NONE = 0,
+ MMC_PACKED_WRITE,
+};
+
struct mmc_queue_req {
struct request *req;
struct mmc_blk_request brq;
@@ -20,6 +25,13 @@
struct scatterlist *bounce_sg;
unsigned int bounce_sg_len;
struct mmc_async_req mmc_active;
+ struct list_head packed_list;
+ u32 packed_cmd_hdr[128];
+ unsigned int packed_blocks;
+ enum mmc_packed_cmd packed_cmd;
+ int packed_retries;
+ int packed_fail_idx;
+ u8 packed_num;
};
struct mmc_queue {