From 24828d0536bbedc9b265f2b01ffca99de3f6a7c7 Mon Sep 17 00:00:00 2001 From: Igor Konopko Date: Tue, 11 Dec 2018 20:16:24 +0100 Subject: lightnvm: dynamic DMA pool entry size MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently lightnvm and pblk uses single DMA pool, for which the entry size always is equal to PAGE_SIZE. The contents of each entry allocated from the DMA pool consists of a PPA list (8bytes * 64), leaving 56bytes * 64 space for metadata. Since the metadata field can be bigger, such as 128 bytes, the static size does not cover this use-case. This patch adds support for I/O metadata above 56 bytes by changing DMA pool size based on device meta size and allows pblk to use OOB metadata >=16B. Reviewed-by: Javier González Signed-off-by: Igor Konopko Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk-init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/lightnvm/pblk-init.c') diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c index 33361bfb85c3..ff6a6df369c3 100644 --- a/drivers/lightnvm/pblk-init.c +++ b/drivers/lightnvm/pblk-init.c @@ -406,7 +406,7 @@ static int pblk_core_init(struct pblk *pblk) pblk_set_sec_per_write(pblk, pblk->min_write_pgs); pblk->oob_meta_size = geo->sos; - if (pblk->oob_meta_size != sizeof(struct pblk_sec_meta)) { + if (pblk->oob_meta_size < sizeof(struct pblk_sec_meta)) { pblk_err(pblk, "Unsupported metadata size\n"); return -EINVAL; } -- cgit