EXPORT_SYMBOL(blk_max_low_pfn);
unsigned long blk_max_pfn;
-EXPORT_SYMBOL(blk_max_pfn);
/**
* blk_queue_prep_rq - set a prepare_request function for queue
}
EXPORT_SYMBOL(blk_queue_prep_rq);
+/**
+ * blk_queue_set_discard - set a discard_sectors function for queue
+ * @q: queue
+ * @dfn: prepare_discard function
+ *
+ * It's possible for a queue to register a discard callback which is used
+ * to transform a discard request into the appropriate type for the
+ * hardware. If none is registered, then discard requests are failed
+ * with %EOPNOTSUPP.
+ *
+ */
+void blk_queue_set_discard(struct request_queue *q, prepare_discard_fn *dfn)
+{
+ q->prepare_discard_fn = dfn;
+}
+EXPORT_SYMBOL(blk_queue_set_discard);
+
/**
* blk_queue_merge_bvec - set a merge_bvec function for queue
* @q: queue
* 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 @page.
+ * buffers for doing I/O to pages residing above @dma_addr.
**/
void blk_queue_bounce_limit(struct request_queue *q, u64 dma_addr)
{
{
if ((max_sectors << 9) < PAGE_CACHE_SIZE) {
max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
- printk(KERN_INFO "%s: set to minimum %d\n", __FUNCTION__,
- max_sectors);
+ printk(KERN_INFO "%s: set to minimum %d\n",
+ __func__, max_sectors);
}
if (BLK_DEF_MAX_SECTORS > max_sectors)
{
if (!max_segments) {
max_segments = 1;
- printk(KERN_INFO "%s: set to minimum %d\n", __FUNCTION__,
- max_segments);
+ printk(KERN_INFO "%s: set to minimum %d\n",
+ __func__, max_segments);
}
q->max_phys_segments = max_segments;
* Description:
* Enables a low level driver to set an upper limit on the number of
* hw data segments in a request. This would be the largest number of
- * address/length pairs the host adapter can actually give as once
+ * address/length pairs the host adapter can actually give at once
* to the device.
**/
void blk_queue_max_hw_segments(struct request_queue *q,
{
if (!max_segments) {
max_segments = 1;
- printk(KERN_INFO "%s: set to minimum %d\n", __FUNCTION__,
- max_segments);
+ printk(KERN_INFO "%s: set to minimum %d\n",
+ __func__, max_segments);
}
q->max_hw_segments = max_segments;
{
if (max_size < PAGE_CACHE_SIZE) {
max_size = PAGE_CACHE_SIZE;
- printk(KERN_INFO "%s: set to minimum %d\n", __FUNCTION__,
- max_size);
+ printk(KERN_INFO "%s: set to minimum %d\n",
+ __func__, max_size);
}
q->max_segment_size = max_size;
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);
+ if (!t->queue_lock)
+ WARN_ON_ONCE(1);
+ else if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags)) {
+ unsigned long flags;
+ spin_lock_irqsave(t->queue_lock, flags);
+ queue_flag_clear(QUEUE_FLAG_CLUSTER, t);
+ spin_unlock_irqrestore(t->queue_lock, flags);
+ }
}
EXPORT_SYMBOL(blk_queue_stack_limits);
* @q: the request queue for the device
* @mask: pad mask
*
- * Set pad mask. Direct IO requests are padded to the mask specified.
+ * Set dma pad mask.
*
- * 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().
+ * Appending pad buffer to a request modifies the last entry of a
+ * scatter list such that it includes the pad buffer.
**/
void blk_queue_dma_pad(struct request_queue *q, unsigned int mask)
{
}
EXPORT_SYMBOL(blk_queue_dma_pad);
+/**
+ * blk_queue_update_dma_pad - update pad mask
+ * @q: the request queue for the device
+ * @mask: pad mask
+ *
+ * Update dma pad mask.
+ *
+ * Appending pad buffer to a request modifies the last entry of a
+ * scatter list such that it includes the pad buffer.
+ **/
+void blk_queue_update_dma_pad(struct request_queue *q, unsigned int mask)
+{
+ if (mask > q->dma_pad_mask)
+ q->dma_pad_mask = 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
{
if (mask < PAGE_CACHE_SIZE - 1) {
mask = PAGE_CACHE_SIZE - 1;
- printk(KERN_INFO "%s: set to minimum %lx\n", __FUNCTION__,
- mask);
+ printk(KERN_INFO "%s: set to minimum %lx\n",
+ __func__, mask);
}
q->seg_boundary_mask = mask;
* @mask: alignment mask
*
* description:
- * set required memory and length aligment for direct dma transactions.
+ * set required memory and length alignment for direct dma transactions.
* this is used when buiding direct io requests for the queue.
*
**/
* @mask: alignment mask
*
* description:
- * update required memory and length aligment for direct dma transactions.
+ * update required memory and length alignment for direct dma transactions.
* If the requested alignment is larger than the current alignment, then
* the current queue alignment is updated to the new value, otherwise it
* is left alone. The design of this is to allow multiple objects
}
EXPORT_SYMBOL(blk_queue_update_dma_alignment);
-static int __init blk_settings_init(void)
+int __init blk_settings_init(void)
{
blk_max_low_pfn = max_low_pfn - 1;
blk_max_pfn = max_pfn - 1;
projects / linux-2.6-omap-h63xx.git / blobdiff