This patch bumps up stream count to suppor in-kernel hints. It also
adds 'streamid' member in 'request' and declares new API for driver
to register stream-info with block layer.
Signed-off-by: Kanchan Joshi <joshi.k@xxxxxxxxxxx>
---
include/linux/blkdev.h | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 338604d..4088e21 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -214,6 +214,7 @@ struct request {
#endif
unsigned short write_hint;
+ unsigned short streamid;
unsigned short ioprio;
void *special; /* opaque pointer available for LLD use */
@@ -341,6 +342,8 @@ struct queue_limits {
unsigned char misaligned;
unsigned char discard_misaligned;
unsigned char raid_partial_stripes_expensive;
+
+ unsigned short nr_streams;
enum blk_zoned_model zoned;
};
@@ -567,8 +570,9 @@ struct request_queue {
size_t cmd_size;
struct work_struct release_work;
-
-#define BLK_MAX_WRITE_HINTS 5
+#define BLK_MAX_USER_HINTS (WRITE_LIFE_KERN_MIN - 2)
+#define BLK_MAX_KERN_HINTS 4
+#define BLK_MAX_WRITE_HINTS (1 + BLK_MAX_USER_HINTS + BLK_MAX_KERN_HINTS)
u64 write_hints[BLK_MAX_WRITE_HINTS];
};
@@ -1071,6 +1075,7 @@ extern void blk_queue_update_dma_alignment(struct request_queue *, int);
extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
extern void blk_queue_flush_queueable(struct request_queue *q, bool queueable);
extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua);
+extern void blk_queue_stream_limits(struct request_queue *, unsigned short);
/*
* Number of physical segments as sent to the device.
--
2.7.4
