diff options
Diffstat (limited to 'block/blk-settings.c')
| -rw-r--r-- | block/blk-settings.c | 450 |
1 files changed, 249 insertions, 201 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index 5f6dcc7a47bd..06ea91e51b8b 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -7,7 +7,8 @@ #include <linux/init.h> #include <linux/bio.h> #include <linux/blkdev.h> -#include <linux/memblock.h> /* for max_pfn/max_low_pfn */ +#include <linux/pagemap.h> +#include <linux/backing-dev-defs.h> #include <linux/gcd.h> #include <linux/lcm.h> #include <linux/jiffies.h> @@ -15,13 +16,9 @@ #include <linux/dma-mapping.h> #include "blk.h" +#include "blk-rq-qos.h" #include "blk-wbt.h" -unsigned long blk_max_low_pfn; -EXPORT_SYMBOL(blk_max_low_pfn); - -unsigned long blk_max_pfn; - void blk_queue_rq_timeout(struct request_queue *q, unsigned int timeout) { q->rq_timeout = timeout; @@ -44,23 +41,25 @@ void blk_set_default_limits(struct queue_limits *lim) lim->virt_boundary_mask = 0; lim->max_segment_size = BLK_MAX_SEGMENT_SIZE; lim->max_sectors = lim->max_hw_sectors = BLK_SAFE_MAX_SECTORS; - lim->max_dev_sectors = 0; + lim->max_user_sectors = lim->max_dev_sectors = 0; lim->chunk_sectors = 0; - lim->max_write_same_sectors = 0; lim->max_write_zeroes_sectors = 0; + lim->max_zone_append_sectors = 0; lim->max_discard_sectors = 0; lim->max_hw_discard_sectors = 0; - lim->discard_granularity = 0; + lim->max_secure_erase_sectors = 0; + lim->discard_granularity = 512; lim->discard_alignment = 0; lim->discard_misaligned = 0; lim->logical_block_size = lim->physical_block_size = lim->io_min = 512; - lim->bounce_pfn = (unsigned long)(BLK_BOUNCE_ANY >> PAGE_SHIFT); + lim->bounce = BLK_BOUNCE_NONE; lim->alignment_offset = 0; lim->io_opt = 0; lim->misaligned = 0; - lim->zoned = BLK_ZONED_NONE; + lim->zoned = false; + lim->zone_write_granularity = 0; + lim->dma_alignment = 511; } -EXPORT_SYMBOL(blk_set_default_limits); /** * blk_set_stacking_limits - set default limits for stacking devices @@ -81,83 +80,24 @@ void blk_set_stacking_limits(struct queue_limits *lim) lim->max_segment_size = UINT_MAX; lim->max_sectors = UINT_MAX; lim->max_dev_sectors = UINT_MAX; - lim->max_write_same_sectors = UINT_MAX; lim->max_write_zeroes_sectors = UINT_MAX; + lim->max_zone_append_sectors = UINT_MAX; } EXPORT_SYMBOL(blk_set_stacking_limits); /** - * blk_queue_make_request - define an alternate make_request function for a device - * @q: the request queue for the device to be affected - * @mfn: the alternate make_request function - * - * Description: - * The normal way for &struct bios to be passed to a device - * driver is for them to be collected into requests on a request - * queue, and then to allow the device driver to select requests - * off that queue when it is ready. This works well for many block - * devices. However some block devices (typically virtual devices - * such as md or lvm) do not benefit from the processing on the - * request queue, and are served best by having the requests passed - * directly to them. This can be achieved by providing a function - * to blk_queue_make_request(). - * - * Caveat: - * The driver that does this *must* be able to deal appropriately - * with buffers in "highmemory". This can be accomplished by either calling - * kmap_atomic() to get a temporary kernel mapping, or by calling - * blk_queue_bounce() to create a buffer in normal memory. - **/ -void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn) -{ - /* - * set defaults - */ - q->nr_requests = BLKDEV_MAX_RQ; - - q->make_request_fn = mfn; - blk_queue_dma_alignment(q, 511); - - blk_set_default_limits(&q->limits); -} -EXPORT_SYMBOL(blk_queue_make_request); - -/** * blk_queue_bounce_limit - set bounce buffer limit for queue * @q: the request queue for the device - * @max_addr: the maximum address the device can handle + * @bounce: bounce limit to enforce * * Description: - * Different hardware can have different requirements as to what pages - * it can do I/O directly to. A low level driver can call - * blk_queue_bounce_limit to have lower memory pages allocated as bounce - * buffers for doing I/O to pages residing above @max_addr. + * Force bouncing for ISA DMA ranges or highmem. + * + * DEPRECATED, don't use in new code. **/ -void blk_queue_bounce_limit(struct request_queue *q, u64 max_addr) +void blk_queue_bounce_limit(struct request_queue *q, enum blk_bounce bounce) { - 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; - } + q->limits.bounce = bounce; } EXPORT_SYMBOL(blk_queue_bounce_limit); @@ -187,15 +127,27 @@ void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_secto if ((max_hw_sectors << 9) < PAGE_SIZE) { max_hw_sectors = 1 << (PAGE_SHIFT - 9); - printk(KERN_INFO "%s: set to minimum %d\n", - __func__, max_hw_sectors); + pr_info("%s: set to minimum %u\n", __func__, max_hw_sectors); } + max_hw_sectors = round_down(max_hw_sectors, + limits->logical_block_size >> SECTOR_SHIFT); limits->max_hw_sectors = max_hw_sectors; + max_sectors = min_not_zero(max_hw_sectors, limits->max_dev_sectors); - max_sectors = min_t(unsigned int, max_sectors, BLK_DEF_MAX_SECTORS); + + if (limits->max_user_sectors) + max_sectors = min(max_sectors, limits->max_user_sectors); + else + max_sectors = min(max_sectors, BLK_DEF_MAX_SECTORS_CAP); + + max_sectors = round_down(max_sectors, + limits->logical_block_size >> SECTOR_SHIFT); limits->max_sectors = max_sectors; - q->backing_dev_info->io_pages = max_sectors >> (PAGE_SHIFT - 9); + + if (!q->disk) + return; + q->disk->bdi->io_pages = max_sectors >> (PAGE_SHIFT - 9); } EXPORT_SYMBOL(blk_queue_max_hw_sectors); @@ -206,15 +158,13 @@ EXPORT_SYMBOL(blk_queue_max_hw_sectors); * * Description: * If a driver doesn't want IOs to cross a given chunk size, it can set - * this limit and prevent merging across chunks. Note that the chunk size - * must currently be a power-of-2 in sectors. Also note that the block - * layer must accept a page worth of data at any offset. So if the - * crossing of chunks is a hard limitation in the driver, it must still be - * prepared to split single page bios. + * this limit and prevent merging across chunks. Note that the block layer + * must accept a page worth of data at any offset. So if the crossing of + * chunks is a hard limitation in the driver, it must still be prepared + * to split single page bios. **/ void blk_queue_chunk_sectors(struct request_queue *q, unsigned int chunk_sectors) { - BUG_ON(!is_power_of_2(chunk_sectors)); q->limits.chunk_sectors = chunk_sectors; } EXPORT_SYMBOL(blk_queue_chunk_sectors); @@ -233,16 +183,16 @@ void blk_queue_max_discard_sectors(struct request_queue *q, EXPORT_SYMBOL(blk_queue_max_discard_sectors); /** - * blk_queue_max_write_same_sectors - set max sectors for a single write same + * blk_queue_max_secure_erase_sectors - set max sectors for a secure erase * @q: the request queue for the device - * @max_write_same_sectors: maximum number of sectors to write per command + * @max_sectors: maximum number of sectors to secure_erase **/ -void blk_queue_max_write_same_sectors(struct request_queue *q, - unsigned int max_write_same_sectors) +void blk_queue_max_secure_erase_sectors(struct request_queue *q, + unsigned int max_sectors) { - q->limits.max_write_same_sectors = max_write_same_sectors; + q->limits.max_secure_erase_sectors = max_sectors; } -EXPORT_SYMBOL(blk_queue_max_write_same_sectors); +EXPORT_SYMBOL(blk_queue_max_secure_erase_sectors); /** * blk_queue_max_write_zeroes_sectors - set max sectors for a single @@ -258,6 +208,33 @@ void blk_queue_max_write_zeroes_sectors(struct request_queue *q, EXPORT_SYMBOL(blk_queue_max_write_zeroes_sectors); /** + * blk_queue_max_zone_append_sectors - set max sectors for a single zone append + * @q: the request queue for the device + * @max_zone_append_sectors: maximum number of sectors to write per command + **/ +void blk_queue_max_zone_append_sectors(struct request_queue *q, + unsigned int max_zone_append_sectors) +{ + unsigned int max_sectors; + + if (WARN_ON(!blk_queue_is_zoned(q))) + return; + + max_sectors = min(q->limits.max_hw_sectors, max_zone_append_sectors); + max_sectors = min(q->limits.chunk_sectors, max_sectors); + + /* + * Signal eventual driver bugs resulting in the max_zone_append sectors limit + * being 0 due to a 0 argument, the chunk_sectors limit (zone size) not set, + * or the max_hw_sectors limit not set. + */ + WARN_ON(!max_sectors); + + q->limits.max_zone_append_sectors = max_sectors; +} +EXPORT_SYMBOL_GPL(blk_queue_max_zone_append_sectors); + +/** * blk_queue_max_segments - set max hw segments for a request for this queue * @q: the request queue for the device * @max_segments: max number of segments @@ -270,8 +247,7 @@ void blk_queue_max_segments(struct request_queue *q, unsigned short max_segments { if (!max_segments) { max_segments = 1; - printk(KERN_INFO "%s: set to minimum %d\n", - __func__, max_segments); + pr_info("%s: set to minimum %u\n", __func__, max_segments); } q->limits.max_segments = max_segments; @@ -307,8 +283,7 @@ void blk_queue_max_segment_size(struct request_queue *q, unsigned int max_size) { if (max_size < PAGE_SIZE) { max_size = PAGE_SIZE; - printk(KERN_INFO "%s: set to minimum %d\n", - __func__, max_size); + pr_info("%s: set to minimum %u\n", __func__, max_size); } /* see blk_queue_virt_boundary() for the explanation */ @@ -328,15 +303,25 @@ EXPORT_SYMBOL(blk_queue_max_segment_size); * storage device can address. The default of 512 covers most * hardware. **/ -void blk_queue_logical_block_size(struct request_queue *q, unsigned short size) +void blk_queue_logical_block_size(struct request_queue *q, unsigned int size) { - q->limits.logical_block_size = size; + struct queue_limits *limits = &q->limits; - if (q->limits.physical_block_size < size) - q->limits.physical_block_size = size; + limits->logical_block_size = size; - if (q->limits.io_min < q->limits.physical_block_size) - q->limits.io_min = q->limits.physical_block_size; + if (limits->discard_granularity < limits->logical_block_size) + limits->discard_granularity = limits->logical_block_size; + + if (limits->physical_block_size < size) + limits->physical_block_size = size; + + if (limits->io_min < limits->physical_block_size) + limits->io_min = limits->physical_block_size; + + limits->max_hw_sectors = + round_down(limits->max_hw_sectors, size >> SECTOR_SHIFT); + limits->max_sectors = + round_down(limits->max_sectors, size >> SECTOR_SHIFT); } EXPORT_SYMBOL(blk_queue_logical_block_size); @@ -357,12 +342,37 @@ void blk_queue_physical_block_size(struct request_queue *q, unsigned int size) if (q->limits.physical_block_size < q->limits.logical_block_size) q->limits.physical_block_size = q->limits.logical_block_size; + if (q->limits.discard_granularity < q->limits.physical_block_size) + q->limits.discard_granularity = q->limits.physical_block_size; + if (q->limits.io_min < q->limits.physical_block_size) q->limits.io_min = q->limits.physical_block_size; } EXPORT_SYMBOL(blk_queue_physical_block_size); /** + * blk_queue_zone_write_granularity - set zone write granularity for the queue + * @q: the request queue for the zoned device + * @size: the zone write granularity size, in bytes + * + * Description: + * This should be set to the lowest possible size allowing to write in + * sequential zones of a zoned block device. + */ +void blk_queue_zone_write_granularity(struct request_queue *q, + unsigned int size) +{ + if (WARN_ON_ONCE(!blk_queue_is_zoned(q))) + return; + + q->limits.zone_write_granularity = size; + + if (q->limits.zone_write_granularity < q->limits.logical_block_size) + q->limits.zone_write_granularity = q->limits.logical_block_size; +} +EXPORT_SYMBOL_GPL(blk_queue_zone_write_granularity); + +/** * blk_queue_alignment_offset - set physical block alignment offset * @q: the request queue for the device * @offset: alignment offset in bytes @@ -381,6 +391,20 @@ void blk_queue_alignment_offset(struct request_queue *q, unsigned int offset) } EXPORT_SYMBOL(blk_queue_alignment_offset); +void disk_update_readahead(struct gendisk *disk) +{ + struct request_queue *q = disk->queue; + + /* + * For read-ahead of large files to be effective, we need to read ahead + * at least twice the optimal I/O size. + */ + disk->bdi->ra_pages = + max(queue_io_opt(q) * 2 / PAGE_SIZE, VM_READAHEAD_PAGES); + disk->bdi->io_pages = queue_max_sectors(q) >> (PAGE_SHIFT - 9); +} +EXPORT_SYMBOL_GPL(disk_update_readahead); + /** * blk_limits_io_min - set minimum request size for a device * @limits: the queue limits @@ -459,19 +483,54 @@ EXPORT_SYMBOL(blk_limits_io_opt); void blk_queue_io_opt(struct request_queue *q, unsigned int opt) { blk_limits_io_opt(&q->limits, opt); + if (!q->disk) + return; + q->disk->bdi->ra_pages = + max(queue_io_opt(q) * 2 / PAGE_SIZE, VM_READAHEAD_PAGES); } EXPORT_SYMBOL(blk_queue_io_opt); -/** - * blk_queue_stack_limits - inherit underlying queue limits for stacked drivers - * @t: the stacking driver (top) - * @b: the underlying device (bottom) - **/ -void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b) +static int queue_limit_alignment_offset(const struct queue_limits *lim, + sector_t sector) { - blk_stack_limits(&t->limits, &b->limits, 0); + unsigned int granularity = max(lim->physical_block_size, lim->io_min); + unsigned int alignment = sector_div(sector, granularity >> SECTOR_SHIFT) + << SECTOR_SHIFT; + + return (granularity + lim->alignment_offset - alignment) % granularity; +} + +static unsigned int queue_limit_discard_alignment( + const struct queue_limits *lim, sector_t sector) +{ + unsigned int alignment, granularity, offset; + + if (!lim->max_discard_sectors) + return 0; + + /* Why are these in bytes, not sectors? */ + alignment = lim->discard_alignment >> SECTOR_SHIFT; + granularity = lim->discard_granularity >> SECTOR_SHIFT; + if (!granularity) + return 0; + + /* Offset of the partition start in 'granularity' sectors */ + offset = sector_div(sector, granularity); + + /* And why do we do this modulus *again* in blkdev_issue_discard()? */ + offset = (granularity + alignment - offset) % granularity; + + /* Turn it back into bytes, gaah */ + return offset << SECTOR_SHIFT; +} + +static unsigned int blk_round_down_sectors(unsigned int sectors, unsigned int lbs) +{ + sectors = round_down(sectors, lbs >> SECTOR_SHIFT); + if (sectors < PAGE_SIZE >> SECTOR_SHIFT) + sectors = PAGE_SIZE >> SECTOR_SHIFT; + return sectors; } -EXPORT_SYMBOL(blk_queue_stack_limits); /** * blk_stack_limits - adjust queue_limits for stacked devices @@ -502,11 +561,11 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->max_sectors = min_not_zero(t->max_sectors, b->max_sectors); t->max_hw_sectors = min_not_zero(t->max_hw_sectors, b->max_hw_sectors); t->max_dev_sectors = min_not_zero(t->max_dev_sectors, b->max_dev_sectors); - t->max_write_same_sectors = min(t->max_write_same_sectors, - b->max_write_same_sectors); t->max_write_zeroes_sectors = min(t->max_write_zeroes_sectors, b->max_write_zeroes_sectors); - t->bounce_pfn = min_not_zero(t->bounce_pfn, b->bounce_pfn); + t->max_zone_append_sectors = min(t->max_zone_append_sectors, + b->max_zone_append_sectors); + t->bounce = max(t->bounce, b->bounce); t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask, b->seg_boundary_mask); @@ -550,6 +609,11 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->io_min = max(t->io_min, b->io_min); t->io_opt = lcm_not_zero(t->io_opt, b->io_opt); + t->dma_alignment = max(t->dma_alignment, b->dma_alignment); + + /* Set non-power-of-2 compatible chunk_sectors boundary */ + if (b->chunk_sectors) + t->chunk_sectors = gcd(t->chunk_sectors, b->chunk_sectors); /* Physical block size a multiple of the logical block size? */ if (t->physical_block_size & (t->logical_block_size - 1)) { @@ -572,6 +636,13 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, ret = -1; } + /* chunk_sectors a multiple of the physical block size? */ + if ((t->chunk_sectors << 9) & (t->physical_block_size - 1)) { + t->chunk_sectors = 0; + t->misaligned = 1; + ret = -1; + } + t->raid_partial_stripes_expensive = max(t->raid_partial_stripes_expensive, b->raid_partial_stripes_expensive); @@ -586,6 +657,10 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, ret = -1; } + t->max_sectors = blk_round_down_sectors(t->max_sectors, t->logical_block_size); + t->max_hw_sectors = blk_round_down_sectors(t->max_hw_sectors, t->logical_block_size); + t->max_dev_sectors = blk_round_down_sectors(t->max_dev_sectors, t->logical_block_size); + /* Discard alignment and granularity */ if (b->discard_granularity) { alignment = queue_limit_discard_alignment(b, start); @@ -609,38 +684,16 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->discard_alignment = lcm_not_zero(t->discard_alignment, alignment) % t->discard_granularity; } - - if (b->chunk_sectors) - t->chunk_sectors = min_not_zero(t->chunk_sectors, - b->chunk_sectors); - + t->max_secure_erase_sectors = min_not_zero(t->max_secure_erase_sectors, + b->max_secure_erase_sectors); + t->zone_write_granularity = max(t->zone_write_granularity, + b->zone_write_granularity); + t->zoned = max(t->zoned, b->zoned); return ret; } EXPORT_SYMBOL(blk_stack_limits); /** - * bdev_stack_limits - adjust queue limits for stacked drivers - * @t: the stacking driver limits (top device) - * @bdev: the component block_device (bottom) - * @start: first data sector within component device - * - * Description: - * Merges queue limits for a top device and a block_device. Returns - * 0 if alignment didn't change. Returns -1 if adding the bottom - * device caused misalignment. - */ -int bdev_stack_limits(struct queue_limits *t, struct block_device *bdev, - sector_t start) -{ - struct request_queue *bq = bdev_get_queue(bdev); - - start += get_start_sect(bdev); - - return blk_stack_limits(t, &bq->limits, start); -} -EXPORT_SYMBOL(bdev_stack_limits); - -/** * disk_stack_limits - adjust queue limits for stacked drivers * @disk: MD/DM gendisk (top) * @bdev: the underlying block device (bottom) @@ -655,15 +708,12 @@ void disk_stack_limits(struct gendisk *disk, struct block_device *bdev, { struct request_queue *t = disk->queue; - if (bdev_stack_limits(&t->limits, bdev, offset >> 9) < 0) { - char top[BDEVNAME_SIZE], bottom[BDEVNAME_SIZE]; + if (blk_stack_limits(&t->limits, &bdev_get_queue(bdev)->limits, + get_start_sect(bdev) + (offset >> 9)) < 0) + pr_notice("%s: Warning: Device %pg is misaligned\n", + disk->disk_name, bdev); - disk_name(disk, 0, top); - bdevname(bdev, bottom); - - printk(KERN_NOTICE "%s: Warning: Device %s is misaligned\n", - top, bottom); - } + disk_update_readahead(disk); } EXPORT_SYMBOL(disk_stack_limits); @@ -685,43 +735,6 @@ void blk_queue_update_dma_pad(struct request_queue *q, unsigned int mask) EXPORT_SYMBOL(blk_queue_update_dma_pad); /** - * blk_queue_dma_drain - Set up a drain buffer for excess dma. - * @q: the request queue for the device - * @dma_drain_needed: fn which returns non-zero if drain is necessary - * @buf: physically contiguous buffer - * @size: size of the buffer in bytes - * - * Some devices have excess DMA problems and can't simply discard (or - * zero fill) the unwanted piece of the transfer. They have to have a - * real area of memory to transfer it into. The use case for this is - * ATAPI devices in DMA mode. If the packet command causes a transfer - * bigger than the transfer size some HBAs will lock up if there - * aren't DMA elements to contain the excess transfer. What this API - * does is adjust the queue so that the buf is always appended - * silently to the scatterlist. - * - * Note: This routine adjusts max_hw_segments to make room for appending - * the drain buffer. If you call blk_queue_max_segments() after calling - * this routine, you must set the limit to one fewer than your device - * can support otherwise there won't be room for the drain buffer. - */ -int blk_queue_dma_drain(struct request_queue *q, - dma_drain_needed_fn *dma_drain_needed, - void *buf, unsigned int size) -{ - if (queue_max_segments(q) < 2) - return -EINVAL; - /* make room for appending the drain */ - blk_queue_max_segments(q, queue_max_segments(q) - 1); - q->dma_drain_needed = dma_drain_needed; - q->dma_drain_buffer = buf; - q->dma_drain_size = size; - - return 0; -} -EXPORT_SYMBOL_GPL(blk_queue_dma_drain); - -/** * blk_queue_segment_boundary - set boundary rules for segment merging * @q: the request queue for the device * @mask: the memory boundary mask @@ -730,8 +743,7 @@ void blk_queue_segment_boundary(struct request_queue *q, unsigned long mask) { if (mask < PAGE_SIZE - 1) { mask = PAGE_SIZE - 1; - printk(KERN_INFO "%s: set to minimum %lx\n", - __func__, mask); + pr_info("%s: set to minimum %lx\n", __func__, mask); } q->limits.seg_boundary_mask = mask; @@ -770,7 +782,7 @@ EXPORT_SYMBOL(blk_queue_virt_boundary); **/ void blk_queue_dma_alignment(struct request_queue *q, int mask) { - q->dma_alignment = mask; + q->limits.dma_alignment = mask; } EXPORT_SYMBOL(blk_queue_dma_alignment); @@ -792,8 +804,8 @@ void blk_queue_update_dma_alignment(struct request_queue *q, int mask) { BUG_ON(mask > PAGE_SIZE); - if (mask > q->dma_alignment) - q->dma_alignment = mask; + if (mask > q->limits.dma_alignment) + q->limits.dma_alignment = mask; } EXPORT_SYMBOL(blk_queue_update_dma_alignment); @@ -820,16 +832,17 @@ EXPORT_SYMBOL(blk_set_queue_depth); */ void blk_queue_write_cache(struct request_queue *q, bool wc, bool fua) { - if (wc) + if (wc) { + blk_queue_flag_set(QUEUE_FLAG_HW_WC, q); blk_queue_flag_set(QUEUE_FLAG_WC, q); - else + } else { + blk_queue_flag_clear(QUEUE_FLAG_HW_WC, q); blk_queue_flag_clear(QUEUE_FLAG_WC, q); + } if (fua) blk_queue_flag_set(QUEUE_FLAG_FUA, q); else blk_queue_flag_clear(QUEUE_FLAG_FUA, q); - - wbt_set_write_cache(q, test_bit(QUEUE_FLAG_WC, &q->queue_flags)); } EXPORT_SYMBOL_GPL(blk_queue_write_cache); @@ -871,10 +884,45 @@ bool blk_queue_can_use_dma_map_merging(struct request_queue *q, } EXPORT_SYMBOL_GPL(blk_queue_can_use_dma_map_merging); -static int __init blk_settings_init(void) +/** + * disk_set_zoned - inidicate a zoned device + * @disk: gendisk to configure + */ +void disk_set_zoned(struct gendisk *disk) { - blk_max_low_pfn = max_low_pfn - 1; - blk_max_pfn = max_pfn - 1; - return 0; + struct request_queue *q = disk->queue; + + WARN_ON_ONCE(!IS_ENABLED(CONFIG_BLK_DEV_ZONED)); + + /* + * Set the zone write granularity to the device logical block + * size by default. The driver can change this value if needed. + */ + q->limits.zoned = true; + blk_queue_zone_write_granularity(q, queue_logical_block_size(q)); +} +EXPORT_SYMBOL_GPL(disk_set_zoned); + +int bdev_alignment_offset(struct block_device *bdev) +{ + struct request_queue *q = bdev_get_queue(bdev); + + if (q->limits.misaligned) + return -1; + if (bdev_is_partition(bdev)) + return queue_limit_alignment_offset(&q->limits, + bdev->bd_start_sect); + return q->limits.alignment_offset; +} +EXPORT_SYMBOL_GPL(bdev_alignment_offset); + +unsigned int bdev_discard_alignment(struct block_device *bdev) +{ + struct request_queue *q = bdev_get_queue(bdev); + + if (bdev_is_partition(bdev)) + return queue_limit_discard_alignment(&q->limits, + bdev->bd_start_sect); + return q->limits.discard_alignment; } -subsys_initcall(blk_settings_init); +EXPORT_SYMBOL_GPL(bdev_discard_alignment); |