#include <linux/lcm.h>
#include <linux/jiffies.h>
#include <linux/gfp.h>
+#include <linux/dma-mapping.h>
#include "blk.h"
#include "blk-wbt.h"
void blk_set_queue_depth(struct request_queue *q, unsigned int depth)
{
q->queue_depth = depth;
- wbt_set_queue_depth(q, depth);
+ rq_qos_queue_depth_changed(q);
}
EXPORT_SYMBOL(blk_set_queue_depth);
}
EXPORT_SYMBOL_GPL(blk_queue_write_cache);
+/**
+ * blk_queue_required_elevator_features - Set a queue required elevator features
+ * @q: the request queue for the target device
+ * @features: Required elevator features OR'ed together
+ *
+ * Tell the block layer that for the device controlled through @q, only the
+ * only elevators that can be used are those that implement at least the set of
+ * features specified by @features.
+ */
+void blk_queue_required_elevator_features(struct request_queue *q,
+ unsigned int features)
+{
+ q->required_elevator_features = features;
+}
+EXPORT_SYMBOL_GPL(blk_queue_required_elevator_features);
+
+/**
+ * blk_queue_can_use_dma_map_merging - configure queue for merging segments.
+ * @q: the request queue for the device
+ * @dev: the device pointer for dma
+ *
+ * Tell the block layer about merging the segments by dma map of @q.
+ */
+bool blk_queue_can_use_dma_map_merging(struct request_queue *q,
+ struct device *dev)
+{
+ unsigned long boundary = dma_get_merge_boundary(dev);
+
+ if (!boundary)
+ return false;
+
+ /* No need to update max_segment_size. see blk_queue_virt_boundary() */
+ blk_queue_virt_boundary(q, boundary);
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(blk_queue_can_use_dma_map_merging);
+
static int __init blk_settings_init(void)
{
blk_max_low_pfn = max_low_pfn - 1;