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authorTom St Denis2017-08-18 10:04:57 -0400
committerAlex Deucher2017-08-29 15:27:52 -0400
commita4dec819c8bba6365eb893a4ca88db4dd1210110 (patch)
tree7c5c86d283b0d027f755ad8ee947573fa4c1d63e /drivers/gpu/drm/ttm
parente719d5169f75ead3c05329b4125afb67b4f33eba (diff)
drm/ttm: Add helper functions to populate/map in one call (v2)
These functions replace a section of common code found in radeon/amdgpu drivers (and possibly others) as part of the ttm_tt_*populate() callbacks. v2: squash in fix for sw iommu from Tom Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/ttm')
-rw-r--r--drivers/gpu/drm/ttm/ttm_page_alloc.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 871599826773..6a660d196d87 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -920,6 +920,47 @@ void ttm_pool_unpopulate(struct ttm_tt *ttm)
}
EXPORT_SYMBOL(ttm_pool_unpopulate);
+int ttm_populate_and_map_pages(struct device *dev, struct ttm_dma_tt *tt)
+{
+ unsigned i;
+ int r;
+
+ r = ttm_pool_populate(&tt->ttm);
+ if (r)
+ return r;
+
+ for (i = 0; i < tt->ttm.num_pages; i++) {
+ tt->dma_address[i] = dma_map_page(dev, tt->ttm.pages[i],
+ 0, PAGE_SIZE,
+ DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(dev, tt->dma_address[i])) {
+ while (i--) {
+ dma_unmap_page(dev, tt->dma_address[i],
+ PAGE_SIZE, DMA_BIDIRECTIONAL);
+ tt->dma_address[i] = 0;
+ }
+ ttm_pool_unpopulate(&tt->ttm);
+ return -EFAULT;
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL(ttm_populate_and_map_pages);
+
+void ttm_unmap_and_unpopulate_pages(struct device *dev, struct ttm_dma_tt *tt)
+{
+ unsigned i;
+
+ for (i = 0; i < tt->ttm.num_pages; i++) {
+ if (tt->dma_address[i]) {
+ dma_unmap_page(dev, tt->dma_address[i],
+ PAGE_SIZE, DMA_BIDIRECTIONAL);
+ }
+ }
+ ttm_pool_unpopulate(&tt->ttm);
+}
+EXPORT_SYMBOL(ttm_unmap_and_unpopulate_pages);
+
int ttm_page_alloc_debugfs(struct seq_file *m, void *data)
{
struct ttm_page_pool *p;