summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/nouveau/nouveau_sgdma.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_sgdma.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_sgdma.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
new file mode 100644
index 000000000..85c03c832
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: MIT
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+
+#include "nouveau_drv.h"
+#include "nouveau_mem.h"
+#include "nouveau_ttm.h"
+#include "nouveau_bo.h"
+
+struct nouveau_sgdma_be {
+ /* this has to be the first field so populate/unpopulated in
+ * nouve_bo.c works properly, otherwise have to move them here
+ */
+ struct ttm_tt ttm;
+ struct nouveau_mem *mem;
+};
+
+void
+nouveau_sgdma_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
+{
+ struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
+
+ if (ttm) {
+ ttm_tt_fini(&nvbe->ttm);
+ kfree(nvbe);
+ }
+}
+
+int
+nouveau_sgdma_bind(struct ttm_device *bdev, struct ttm_tt *ttm, struct ttm_resource *reg)
+{
+ struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
+ struct nouveau_drm *drm = nouveau_bdev(bdev);
+ struct nouveau_mem *mem = nouveau_mem(reg);
+ int ret;
+
+ if (nvbe->mem)
+ return 0;
+
+ ret = nouveau_mem_host(reg, &nvbe->ttm);
+ if (ret)
+ return ret;
+
+ if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
+ ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
+ if (ret) {
+ nouveau_mem_fini(mem);
+ return ret;
+ }
+ }
+
+ nvbe->mem = mem;
+ return 0;
+}
+
+void
+nouveau_sgdma_unbind(struct ttm_device *bdev, struct ttm_tt *ttm)
+{
+ struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
+ if (nvbe->mem) {
+ nouveau_mem_fini(nvbe->mem);
+ nvbe->mem = NULL;
+ }
+}
+
+struct ttm_tt *
+nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags)
+{
+ struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
+ struct nouveau_bo *nvbo = nouveau_bo(bo);
+ struct nouveau_sgdma_be *nvbe;
+ enum ttm_caching caching;
+
+ if (nvbo->force_coherent)
+ caching = ttm_uncached;
+ else if (drm->agp.bridge)
+ caching = ttm_write_combined;
+ else
+ caching = ttm_cached;
+
+ nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
+ if (!nvbe)
+ return NULL;
+
+ if (ttm_sg_tt_init(&nvbe->ttm, bo, page_flags, caching)) {
+ kfree(nvbe);
+ return NULL;
+ }
+ return &nvbe->ttm;
+}