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authorChristoph Hellwig <hch@lst.de>2021-03-31 09:29:59 +0200
committerJens Axboe <axboe@kernel.dk>2021-04-06 09:28:17 -0600
commitce288e0535688cc3475a3c3d4d96624514c3550c (patch)
tree41ac394debd88e09edd6c123757b96fb92d09110 /block
parentaaff5ebaa2694f283b7d07fdd55fb287ffc4f1e9 (diff)
block: remove BLK_BOUNCE_ISA support
Remove the BLK_BOUNCE_ISA support now that all users are gone. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20210331073001.46776-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/bio-integrity.c3
-rw-r--r--block/blk-map.c4
-rw-r--r--block/blk-settings.c11
-rw-r--r--block/blk.h5
-rw-r--r--block/bounce.c124
-rw-r--r--block/scsi_ioctl.c2
6 files changed, 30 insertions, 119 deletions
diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index dfa652122a2d..4b4eb8964a6f 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -204,7 +204,6 @@ bool bio_integrity_prep(struct bio *bio)
{
struct bio_integrity_payload *bip;
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);
- struct request_queue *q = bio->bi_bdev->bd_disk->queue;
void *buf;
unsigned long start, end;
unsigned int len, nr_pages;
@@ -238,7 +237,7 @@ bool bio_integrity_prep(struct bio *bio)
/* Allocate kernel buffer for protection data */
len = intervals * bi->tuple_size;
- buf = kmalloc(len, GFP_NOIO | q->bounce_gfp);
+ buf = kmalloc(len, GFP_NOIO);
status = BLK_STS_RESOURCE;
if (unlikely(buf == NULL)) {
printk(KERN_ERR "could not allocate integrity buffer\n");
diff --git a/block/blk-map.c b/block/blk-map.c
index 1ffef782fcf2..b62b52dcb61d 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -181,7 +181,7 @@ static int bio_copy_user_iov(struct request *rq, struct rq_map_data *map_data,
i++;
} else {
- page = alloc_page(rq->q->bounce_gfp | gfp_mask);
+ page = alloc_page(GFP_NOIO | gfp_mask);
if (!page) {
ret = -ENOMEM;
goto cleanup;
@@ -486,7 +486,7 @@ static struct bio *bio_copy_kern(struct request_queue *q, void *data,
if (bytes > len)
bytes = len;
- page = alloc_page(q->bounce_gfp | gfp_mask);
+ page = alloc_page(GFP_NOIO | gfp_mask);
if (!page)
goto cleanup;
diff --git a/block/blk-settings.c b/block/blk-settings.c
index b4aa2f37fab6..f9937dd2810e 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -103,28 +103,17 @@ EXPORT_SYMBOL(blk_set_stacking_limits);
void blk_queue_bounce_limit(struct request_queue *q, u64 max_addr)
{
unsigned long b_pfn = max_addr >> PAGE_SHIFT;
- int dma = 0;
- q->bounce_gfp = GFP_NOIO;
#if BITS_PER_LONG == 64
/*
* Assume anything <= 4GB can be handled by IOMMU. Actually
* some IOMMUs can handle everything, but I don't know of a
* way to test this here.
*/
- if (b_pfn < (min_t(u64, 0xffffffffUL, BLK_BOUNCE_HIGH) >> PAGE_SHIFT))
- dma = 1;
q->limits.bounce_pfn = max(max_low_pfn, b_pfn);
#else
- if (b_pfn < blk_max_low_pfn)
- dma = 1;
q->limits.bounce_pfn = b_pfn;
#endif
- if (dma) {
- init_emergency_isa_pool();
- q->bounce_gfp = GFP_NOIO | GFP_DMA;
- q->limits.bounce_pfn = b_pfn;
- }
}
EXPORT_SYMBOL(blk_queue_bounce_limit);
diff --git a/block/blk.h b/block/blk.h
index 3b53e44b967e..895c9f4a5182 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -312,13 +312,8 @@ static inline void blk_throtl_stat_add(struct request *rq, u64 time) { }
#endif
#ifdef CONFIG_BOUNCE
-extern int init_emergency_isa_pool(void);
extern void blk_queue_bounce(struct request_queue *q, struct bio **bio);
#else
-static inline int init_emergency_isa_pool(void)
-{
- return 0;
-}
static inline void blk_queue_bounce(struct request_queue *q, struct bio **bio)
{
}
diff --git a/block/bounce.c b/block/bounce.c
index 6c441f4f1cd4..debd5b0bd318 100644
--- a/block/bounce.c
+++ b/block/bounce.c
@@ -29,7 +29,7 @@
#define ISA_POOL_SIZE 16
static struct bio_set bounce_bio_set, bounce_bio_split;
-static mempool_t page_pool, isa_page_pool;
+static mempool_t page_pool;
static void init_bounce_bioset(void)
{
@@ -90,41 +90,6 @@ static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
#endif /* CONFIG_HIGHMEM */
/*
- * allocate pages in the DMA region for the ISA pool
- */
-static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
-{
- return mempool_alloc_pages(gfp_mask | GFP_DMA, data);
-}
-
-static DEFINE_MUTEX(isa_mutex);
-
-/*
- * gets called "every" time someone init's a queue with BLK_BOUNCE_ISA
- * as the max address, so check if the pool has already been created.
- */
-int init_emergency_isa_pool(void)
-{
- int ret;
-
- mutex_lock(&isa_mutex);
-
- if (mempool_initialized(&isa_page_pool)) {
- mutex_unlock(&isa_mutex);
- return 0;
- }
-
- ret = mempool_init(&isa_page_pool, ISA_POOL_SIZE, mempool_alloc_pages_isa,
- mempool_free_pages, (void *) 0);
- BUG_ON(ret);
-
- pr_info("isa pool size: %d pages\n", ISA_POOL_SIZE);
- init_bounce_bioset();
- mutex_unlock(&isa_mutex);
- return 0;
-}
-
-/*
* Simple bounce buffer support for highmem pages. Depending on the
* queue gfp mask set, *to may or may not be a highmem page. kmap it
* always, it will do the Right Thing
@@ -159,7 +124,7 @@ static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
}
}
-static void bounce_end_io(struct bio *bio, mempool_t *pool)
+static void bounce_end_io(struct bio *bio)
{
struct bio *bio_orig = bio->bi_private;
struct bio_vec *bvec, orig_vec;
@@ -173,7 +138,7 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool)
orig_vec = bio_iter_iovec(bio_orig, orig_iter);
if (bvec->bv_page != orig_vec.bv_page) {
dec_zone_page_state(bvec->bv_page, NR_BOUNCE);
- mempool_free(bvec->bv_page, pool);
+ mempool_free(bvec->bv_page, &page_pool);
}
bio_advance_iter(bio_orig, &orig_iter, orig_vec.bv_len);
}
@@ -185,33 +150,17 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool)
static void bounce_end_io_write(struct bio *bio)
{
- bounce_end_io(bio, &page_pool);
-}
-
-static void bounce_end_io_write_isa(struct bio *bio)
-{
-
- bounce_end_io(bio, &isa_page_pool);
+ bounce_end_io(bio);
}
-static void __bounce_end_io_read(struct bio *bio, mempool_t *pool)
+static void bounce_end_io_read(struct bio *bio)
{
struct bio *bio_orig = bio->bi_private;
if (!bio->bi_status)
copy_to_high_bio_irq(bio_orig, bio);
- bounce_end_io(bio, pool);
-}
-
-static void bounce_end_io_read(struct bio *bio)
-{
- __bounce_end_io_read(bio, &page_pool);
-}
-
-static void bounce_end_io_read_isa(struct bio *bio)
-{
- __bounce_end_io_read(bio, &isa_page_pool);
+ bounce_end_io(bio);
}
static struct bio *bounce_clone_bio(struct bio *bio_src)
@@ -287,8 +236,8 @@ err_put:
return NULL;
}
-static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
- mempool_t *pool)
+
+void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
{
struct bio *bio;
int rw = bio_data_dir(*bio_orig);
@@ -298,6 +247,20 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
bool bounce = false;
int sectors = 0;
+ /*
+ * Data-less bio, nothing to bounce
+ */
+ if (!bio_has_data(*bio_orig))
+ return;
+
+ /*
+ * Just check if the bounce pfn is equal to or bigger than the highest
+ * pfn in the system -- in that case, don't waste time iterating over
+ * bio segments
+ */
+ if (q->limits.bounce_pfn >= blk_max_pfn)
+ return;
+
bio_for_each_segment(from, *bio_orig, iter) {
if (i++ < BIO_MAX_VECS)
sectors += from.bv_len >> 9;
@@ -327,7 +290,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
if (page_to_pfn(page) <= q->limits.bounce_pfn)
continue;
- to->bv_page = mempool_alloc(pool, q->bounce_gfp);
+ to->bv_page = mempool_alloc(&page_pool, GFP_NOIO);
inc_zone_page_state(to->bv_page, NR_BOUNCE);
if (rw == WRITE) {
@@ -346,46 +309,11 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
bio->bi_flags |= (1 << BIO_BOUNCED);
- if (pool == &page_pool) {
+ if (rw == READ)
+ bio->bi_end_io = bounce_end_io_read;
+ else
bio->bi_end_io = bounce_end_io_write;
- if (rw == READ)
- bio->bi_end_io = bounce_end_io_read;
- } else {
- bio->bi_end_io = bounce_end_io_write_isa;
- if (rw == READ)
- bio->bi_end_io = bounce_end_io_read_isa;
- }
bio->bi_private = *bio_orig;
*bio_orig = bio;
}
-
-void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
-{
- mempool_t *pool;
-
- /*
- * Data-less bio, nothing to bounce
- */
- if (!bio_has_data(*bio_orig))
- return;
-
- /*
- * for non-isa bounce case, just check if the bounce pfn is equal
- * to or bigger than the highest pfn in the system -- in that case,
- * don't waste time iterating over bio segments
- */
- if (!(q->bounce_gfp & GFP_DMA)) {
- if (q->limits.bounce_pfn >= blk_max_pfn)
- return;
- pool = &page_pool;
- } else {
- BUG_ON(!mempool_initialized(&isa_page_pool));
- pool = &isa_page_pool;
- }
-
- /*
- * slow path
- */
- __blk_queue_bounce(q, bio_orig, pool);
-}
diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 6599bac0a78c..1048b0925567 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -431,7 +431,7 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
bytes = max(in_len, out_len);
if (bytes) {
- buffer = kzalloc(bytes, q->bounce_gfp | GFP_USER| __GFP_NOWARN);
+ buffer = kzalloc(bytes, GFP_NOIO | GFP_USER | __GFP_NOWARN);
if (!buffer)
return -ENOMEM;

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