aboutsummaryrefslogtreecommitdiff
path: root/lib/dma.h
diff options
context:
space:
mode:
Diffstat (limited to 'lib/dma.h')
-rw-r--r--lib/dma.h23
1 files changed, 16 insertions, 7 deletions
diff --git a/lib/dma.h b/lib/dma.h
index aeed9bb..7bab3da 100644
--- a/lib/dma.h
+++ b/lib/dma.h
@@ -181,6 +181,21 @@ _dma_mark_dirty(const dma_controller_t *dma, const dma_memory_region_t *region,
}
}
+static inline void
+dma_init_sg(const dma_controller_t *dma, dma_sg_t *sg, dma_addr_t dma_addr,
+ uint32_t len, int prot, int region_index)
+{
+ const dma_memory_region_t *const region = &dma->regions[region_index];
+ sg->dma_addr = region->dma_addr;
+ sg->region = region_index;
+ sg->offset = dma_addr - region->dma_addr;
+ sg->length = len;
+ if (_dma_should_mark_dirty(dma, prot)) {
+ _dma_mark_dirty(dma, region, sg);
+ }
+ sg->mappable = region->virt_addr != NULL;
+}
+
/* Takes a linear dma address span and returns a sg list suitable for DMA.
* A single linear dma address span may need to be split into multiple
* scatter gather regions due to limitations of how memory can be mapped.
@@ -207,13 +222,7 @@ dma_addr_to_sg(const dma_controller_t *dma,
if (likely(max_sg > 0 && len > 0 &&
dma_addr >= region->dma_addr && dma_addr + len <= region_end &&
region_hint < dma->nregions)) {
- sg->dma_addr = region->dma_addr;
- sg->region = region_hint;
- sg->offset = dma_addr - region->dma_addr;
- sg->length = len;
- if (_dma_should_mark_dirty(dma, prot)) {
- _dma_mark_dirty(dma, region, sg);
- }
+ dma_init_sg(dma, sg, dma_addr, len, prot, region_hint);
return 1;
}
// Slow path: search through regions.