mmc: card: Add eMMC4.5 write packed commands unit-tests

Expose the following packed commands tests:
- Test the write packed commands list preparation
- Simulate a returned error code
- Send an invalid packed command to the card

(cherry picked from commit 09b010d749e40e86b42e62406f8886956e03f3bd)

Change-Id: I563a17b8dc313e65c20ed24d542d29ab7b432741
Signed-off-by: Lee Susman <lsusman@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
(cherry picked from commit 1dc976ea347887060c162a80b3180a0981b5d1bd)
diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h
index 93e4b59..a8c104e 100644
--- a/drivers/mmc/card/queue.h
+++ b/drivers/mmc/card/queue.h
@@ -12,6 +12,17 @@
 	struct mmc_data		data;
 };
 
+enum mmc_blk_status {
+	MMC_BLK_SUCCESS = 0,
+	MMC_BLK_PARTIAL,
+	MMC_BLK_CMD_ERR,
+	MMC_BLK_RETRY,
+	MMC_BLK_ABORT,
+	MMC_BLK_DATA_ERR,
+	MMC_BLK_ECC_ERR,
+	MMC_BLK_NOMEDIUM,
+};
+
 enum mmc_packed_cmd {
 	MMC_PACKED_NONE = 0,
 	MMC_PACKED_WRITE,
@@ -48,6 +59,8 @@
 	bool			wr_packing_enabled;
 	int			num_of_potential_packed_wr_reqs;
 	int			num_wr_reqs_to_start_packing;
+	int (*err_check_fn) (struct mmc_card *, struct mmc_async_req *);
+	void (*packed_test_fn) (struct request_queue *, struct mmc_queue_req *);
 };
 
 extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
@@ -61,4 +74,6 @@
 extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
 extern void mmc_queue_bounce_post(struct mmc_queue_req *);
 
+extern void print_mmc_packing_stats(struct mmc_card *card);
+
 #endif