From f9c101523da75cd483b95f04c21242bb83960d93 Mon Sep 17 00:00:00 2001 From: Javier González Date: Mon, 26 Jun 2017 11:57:20 +0200 Subject: 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 Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk.h | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) (limited to 'drivers/lightnvm/pblk.h') diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 50f30434718f..6dc58d360077 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) +{ + 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 NVM_IO_SNGL_ACCESS | NVM_IO_SUSPEND | NVM_IO_SCRAMBLE_ENABLE; + return !(nr_secs % pblk->min_write_pgs); } #ifdef CONFIG_NVM_DEBUG -- cgit v1.2.3-55-g7522