lightnvm: pblk: issue multiplane reads if possible
If a read request is sequential and its size aligns with a
multi-plane page size, use the multi-plane hint to process the I/O in
parallel in the controller.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index 50f3043..6dc58d3 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -1075,9 +1075,27 @@ static inline int pblk_set_progr_mode(struct pblk *pblk, int type)
return flags;
}
-static inline int pblk_set_read_mode(struct pblk *pblk)
+enum {
+ PBLK_READ_RANDOM = 0,
+ PBLK_READ_SEQUENTIAL = 1,
+};
+
+static inline int pblk_set_read_mode(struct pblk *pblk, int type)
{
- return NVM_IO_SNGL_ACCESS | NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE;
+ struct nvm_tgt_dev *dev = pblk->dev;
+ struct nvm_geo *geo = &dev->geo;
+ int flags;
+
+ flags = NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE;
+ if (type == PBLK_READ_SEQUENTIAL)
+ flags |= geo->plane_mode >> 1;
+
+ return flags;
+}
+
+static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
+{
+ return !(nr_secs % pblk->min_write_pgs);
}
#ifdef CONFIG_NVM_DEBUG