#include "blk.h"
-unsigned long blk_max_low_pfn, blk_max_pfn;
+unsigned long blk_max_low_pfn;
EXPORT_SYMBOL(blk_max_low_pfn);
+
+unsigned long blk_max_pfn;
EXPORT_SYMBOL(blk_max_pfn);
/**
{
q->prep_rq_fn = pfn;
}
-
EXPORT_SYMBOL(blk_queue_prep_rq);
/**
{
q->merge_bvec_fn = mbfn;
}
-
EXPORT_SYMBOL(blk_queue_merge_bvec);
void blk_queue_softirq_done(struct request_queue *q, softirq_done_fn *fn)
{
q->softirq_done_fn = fn;
}
-
EXPORT_SYMBOL(blk_queue_softirq_done);
/**
* __bio_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)
+void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn)
{
/*
* set defaults
blk_queue_max_phys_segments(q, MAX_PHYS_SEGMENTS);
blk_queue_max_hw_segments(q, MAX_HW_SEGMENTS);
q->make_request_fn = mfn;
- q->backing_dev_info.ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
+ q->backing_dev_info.ra_pages =
+ (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
q->backing_dev_info.state = 0;
q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
blk_queue_max_sectors(q, SAFE_MAX_SECTORS);
*/
blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH);
}
-
EXPORT_SYMBOL(blk_queue_make_request);
/**
**/
void blk_queue_bounce_limit(struct request_queue *q, u64 dma_addr)
{
- unsigned long bounce_pfn = dma_addr >> PAGE_SHIFT;
+ unsigned long b_pfn = dma_addr >> PAGE_SHIFT;
int dma = 0;
q->bounce_gfp = GFP_NOIO;
/* 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 (bounce_pfn < (min_t(u64,0xffffffff,BLK_BOUNCE_HIGH) >> PAGE_SHIFT))
+ if (b_pfn < (min_t(u64, 0x100000000UL, BLK_BOUNCE_HIGH) >> PAGE_SHIFT))
dma = 1;
q->bounce_pfn = max_low_pfn;
#else
- if (bounce_pfn < blk_max_low_pfn)
+ if (b_pfn < blk_max_low_pfn)
dma = 1;
- q->bounce_pfn = bounce_pfn;
+ q->bounce_pfn = b_pfn;
#endif
if (dma) {
init_emergency_isa_pool();
q->bounce_gfp = GFP_NOIO | GFP_DMA;
- q->bounce_pfn = bounce_pfn;
+ q->bounce_pfn = b_pfn;
}
}
-
EXPORT_SYMBOL(blk_queue_bounce_limit);
/**
{
if ((max_sectors << 9) < PAGE_CACHE_SIZE) {
max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
- printk("%s: set to minimum %d\n", __FUNCTION__, max_sectors);
+ printk(KERN_INFO "%s: set to minimum %d\n", __FUNCTION__,
+ max_sectors);
}
if (BLK_DEF_MAX_SECTORS > max_sectors)
q->max_hw_sectors = max_sectors;
}
}
-
EXPORT_SYMBOL(blk_queue_max_sectors);
/**
{
if (!max_segments) {
max_segments = 1;
- printk("%s: set to minimum %d\n", __FUNCTION__, max_segments);
+ printk(KERN_INFO "%s: set to minimum %d\n", __FUNCTION__,
+ max_segments);
}
q->max_phys_segments = max_segments;
}
-
EXPORT_SYMBOL(blk_queue_max_phys_segments);
/**
{
if (!max_segments) {
max_segments = 1;
- printk("%s: set to minimum %d\n", __FUNCTION__, max_segments);
+ printk(KERN_INFO "%s: set to minimum %d\n", __FUNCTION__,
+ max_segments);
}
q->max_hw_segments = max_segments;
}
-
EXPORT_SYMBOL(blk_queue_max_hw_segments);
/**
{
if (max_size < PAGE_CACHE_SIZE) {
max_size = PAGE_CACHE_SIZE;
- printk("%s: set to minimum %d\n", __FUNCTION__, max_size);
+ printk(KERN_INFO "%s: set to minimum %d\n", __FUNCTION__,
+ max_size);
}
q->max_segment_size = max_size;
}
-
EXPORT_SYMBOL(blk_queue_max_segment_size);
/**
{
q->hardsect_size = size;
}
-
EXPORT_SYMBOL(blk_queue_hardsect_size);
/*
void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b)
{
/* zero is "infinity" */
- 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_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_phys_segments = min(t->max_phys_segments,b->max_phys_segments);
- t->max_hw_segments = min(t->max_hw_segments,b->max_hw_segments);
- t->max_segment_size = min(t->max_segment_size,b->max_segment_size);
- t->hardsect_size = max(t->hardsect_size,b->hardsect_size);
+ t->max_phys_segments = min(t->max_phys_segments, b->max_phys_segments);
+ t->max_hw_segments = min(t->max_hw_segments, b->max_hw_segments);
+ t->max_segment_size = min(t->max_segment_size, b->max_segment_size);
+ t->hardsect_size = max(t->hardsect_size, b->hardsect_size);
if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags))
clear_bit(QUEUE_FLAG_CLUSTER, &t->queue_flags);
}
-
EXPORT_SYMBOL(blk_queue_stack_limits);
/**
- * blk_queue_dma_drain - Set up a drain buffer for excess dma.
+ * blk_queue_dma_pad - set pad mask
+ * @q: the request queue for the device
+ * @mask: pad mask
+ *
+ * Set pad mask. Direct IO requests are padded to the mask specified.
*
+ * Appending pad buffer to a request modifies ->data_len such that it
+ * includes the pad buffer. The original requested data length can be
+ * obtained using blk_rq_raw_data_len().
+ **/
+void blk_queue_dma_pad(struct request_queue *q, unsigned int mask)
+{
+ q->dma_pad_mask = mask;
+}
+EXPORT_SYMBOL(blk_queue_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
*
* device can support otherwise there won't be room for the drain
* buffer.
*/
-int blk_queue_dma_drain(struct request_queue *q, void *buf,
- unsigned int size)
+int blk_queue_dma_drain(struct request_queue *q,
+ dma_drain_needed_fn *dma_drain_needed,
+ void *buf, unsigned int size)
{
if (q->max_hw_segments < 2 || q->max_phys_segments < 2)
return -EINVAL;
/* make room for appending the drain */
--q->max_hw_segments;
--q->max_phys_segments;
+ 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);
/**
{
if (mask < PAGE_CACHE_SIZE - 1) {
mask = PAGE_CACHE_SIZE - 1;
- printk("%s: set to minimum %lx\n", __FUNCTION__, mask);
+ printk(KERN_INFO "%s: set to minimum %lx\n", __FUNCTION__,
+ mask);
}
q->seg_boundary_mask = mask;
}
-
EXPORT_SYMBOL(blk_queue_segment_boundary);
/**
{
q->dma_alignment = mask;
}
-
EXPORT_SYMBOL(blk_queue_dma_alignment);
/**
if (mask > q->dma_alignment)
q->dma_alignment = mask;
}
-
EXPORT_SYMBOL(blk_queue_update_dma_alignment);
-int __init blk_settings_init(void)
+static int __init blk_settings_init(void)
{
blk_max_low_pfn = max_low_pfn - 1;
blk_max_pfn = max_pfn - 1;
git.samba.org / sfrench / cifs-2.6.git / blobdiff