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Commit dd439496 authored by Igor Konopko's avatar Igor Konopko Committed by Jens Axboe
Browse files

lightnvm: pblk: move lba list to partial read context 



Currently DMA allocated memory is reused on partial read
for lba_list_mem and lba_list_media arrays. In preparation
for dynamic DMA pool sizes we need to move this arrays
into pblk_pr_ctx structures.

Reviewed-by: default avatarJavier González <javier@cnexlabs.com>
Signed-off-by: default avatarIgor Konopko <igor.j.konopko@intel.com>
Signed-off-by: default avatarMatias Bjørling <mb@lightnvm.io>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 42bd0384

drivers/lightnvm/pblk-read.c

+5 −15
Original line number Diff line number Diff line
@@ -224,7 +224,6 @@ static void pblk_end_partial_read(struct nvm_rq *rqd) 
	unsigned long *read_bitmap = pr_ctx->bitmap;

	int nr_secs = pr_ctx->orig_nr_secs;

	int nr_holes = nr_secs - bitmap_weight(read_bitmap, nr_secs);

	__le64 *lba_list_mem, *lba_list_media;

	void *src_p, *dst_p;

	int hole, i;
@@ -237,13 +236,9 @@ static void pblk_end_partial_read(struct nvm_rq *rqd) 
		rqd->ppa_list[0] = ppa;

	}



	/* Re-use allocated memory for intermediate lbas */

	lba_list_mem = (((void *)rqd->ppa_list) + pblk_dma_ppa_size);

	lba_list_media = (((void *)rqd->ppa_list) + 2 * pblk_dma_ppa_size);



	for (i = 0; i < nr_secs; i++) {

		lba_list_media[i] = meta_list[i].lba;

		meta_list[i].lba = lba_list_mem[i];

		pr_ctx->lba_list_media[i] = meta_list[i].lba;

		meta_list[i].lba = pr_ctx->lba_list_mem[i];

	}



	/* Fill the holes in the original bio */
@@ -255,7 +250,7 @@ static void pblk_end_partial_read(struct nvm_rq *rqd) 
		line = pblk_ppa_to_line(pblk, rqd->ppa_list[i]);

		kref_put(&line->ref, pblk_line_put);



		meta_list[hole].lba = lba_list_media[i];

		meta_list[hole].lba = pr_ctx->lba_list_media[i];



		src_bv = new_bio->bi_io_vec[i++];

		dst_bv = bio->bi_io_vec[bio_init_idx + hole];
@@ -295,13 +290,9 @@ static int pblk_setup_partial_read(struct pblk *pblk, struct nvm_rq *rqd, 
	struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd);

	struct pblk_pr_ctx *pr_ctx;

	struct bio *new_bio, *bio = r_ctx->private;

	__le64 *lba_list_mem;

	int nr_secs = rqd->nr_ppas;

	int i;



	/* Re-use allocated memory for intermediate lbas */

	lba_list_mem = (((void *)rqd->ppa_list) + pblk_dma_ppa_size);



	new_bio = bio_alloc(GFP_KERNEL, nr_holes);



	if (pblk_bio_add_pages(pblk, new_bio, GFP_KERNEL, nr_holes))
@@ -312,12 +303,12 @@ static int pblk_setup_partial_read(struct pblk *pblk, struct nvm_rq *rqd, 
		goto fail_free_pages;

	}



	pr_ctx = kmalloc(sizeof(struct pblk_pr_ctx), GFP_KERNEL);

	pr_ctx = kzalloc(sizeof(struct pblk_pr_ctx), GFP_KERNEL);

	if (!pr_ctx)

		goto fail_free_pages;



	for (i = 0; i < nr_secs; i++)

		lba_list_mem[i] = meta_list[i].lba;

		pr_ctx->lba_list_mem[i] = meta_list[i].lba;



	new_bio->bi_iter.bi_sector = 0; /* internal bio */

	bio_set_op_attrs(new_bio, REQ_OP_READ, 0);
@@ -325,7 +316,6 @@ static int pblk_setup_partial_read(struct pblk *pblk, struct nvm_rq *rqd, 
	rqd->bio = new_bio;

	rqd->nr_ppas = nr_holes;



	pr_ctx->ppa_ptr = NULL;

	pr_ctx->orig_bio = bio;

	bitmap_copy(pr_ctx->bitmap, read_bitmap, NVM_MAX_VLBA);

	pr_ctx->bio_init_idx = bio_init_idx;

drivers/lightnvm/pblk.h

+2 −0
Original line number Diff line number Diff line
@@ -132,6 +132,8 @@ struct pblk_pr_ctx { 
	unsigned int bio_init_idx;

	void *ppa_ptr;

	dma_addr_t dma_ppa_list;

	__le64 lba_list_mem[NVM_MAX_VLBA];

	__le64 lba_list_media[NVM_MAX_VLBA];

};



/* Pad context */