drm/nouveau: allocate vram with nvkm_ram_get()

This will cause a subtle behaviour change on GPUs that are in mixed-memory
configurations in that VRAM in the degraded section of VRAM will no longer
be used for TTM buffer objects.

That section of VRAM is not meant to be used for displayable/compressed
surfaces, and we have no reliable way with the current interfaces to be
able to make that decision properly.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_mem.c

@@ -74,18 +74,44 @@ nouveau_mem_host(struct ttm_mem_reg *reg, struct ttm_dma_tt *tt)
 	return 0;
 }
 
+#include <subdev/fb/nv50.h>
+
+struct nvkm_vram {
+	struct nvkm_memory memory;
+	struct nvkm_ram *ram;
+	u8 page;
+	struct nvkm_mm_node *mn;
+};
+
 int
 nouveau_mem_vram(struct ttm_mem_reg *reg, bool contig, u8 page)
 {
 	struct nouveau_mem *mem = nouveau_mem(reg);
 	struct nouveau_cli *cli = mem->cli;
 	struct nvkm_device *device = nvxx_device(&cli->device);
-	struct nvkm_ram *ram = nvxx_fb(&cli->device)->ram;
 	u64 size = ALIGN(reg->num_pages << PAGE_SHIFT, 1 << page);
+	u8  type;
 	int ret;
 
 	mem->mem.page = page;
-	mem->_mem->memory = &mem->memory;
+	mem->_mem = &mem->__mem;
+
+	if (cli->device.info.chipset < 0xc0) {
+		type = nv50_fb_memtype[mem->kind];
+	} else {
+		if (!mem->comp)
+			mem->kind = gf100_pte_storage_type_map[mem->kind];
+		mem->comp = 0;
+		type = 0x01;
+	}
+
+	ret = nvkm_ram_get(device, NVKM_RAM_MM_NORMAL, type, page, size,
+			   contig, false, &mem->_mem->memory);
+	if (ret)
+		return ret;
+
+	mem->_mem->size = size >> NVKM_RAM_MM_SHIFT;
+	mem->_mem->offset = nvkm_memory_addr(mem->_mem->memory);
 
 	if (cli->device.info.chipset < 0xc0 && mem->comp) {
 		if (page == 16) {
@@ -110,15 +136,10 @@ nouveau_mem_vram(struct ttm_mem_reg *reg, bool contig, u8 page)
 			mem->kind = gf100_pte_storage_type_map[mem->kind];
 	}
 
-	ret = ram->func->get(ram, size, 1 << page, contig ? 0 : 1 << page,
-			     (mem->comp << 8) | mem->kind, &mem->_mem);
-	if (ret) {
-		nvkm_memory_tags_put(mem->_mem->memory, device, &mem->tags);
-		return ret;
-	}
-
 	if (mem->tags && mem->tags->mn)
 		mem->_mem->tag = mem->tags->mn;
+	mem->_mem->mem = ((struct nvkm_vram *)mem->_mem->memory)->mn;
+	mem->_mem->memtype = (mem->comp << 7) | mem->kind;
 
 	reg->start = mem->_mem->offset >> PAGE_SHIFT;
 	return ret;

drivers/gpu/drm/nouveau/nouveau_ttm.c

@@ -60,11 +60,9 @@ static void
 nouveau_vram_manager_del(struct ttm_mem_type_manager *man,
 			 struct ttm_mem_reg *reg)
 {
-	struct nouveau_drm *drm = nouveau_bdev(man->bdev);
-	struct nvkm_ram *ram = nvxx_fb(&drm->client.device)->ram;
-	struct nvkm_mem *mem = nouveau_mem(reg)->_mem;
+	struct nvkm_memory *memory = nouveau_mem(reg)->_mem->memory;
 	nouveau_mem_del(reg);
-	ram->func->put(ram, &mem);
+	nvkm_memory_unref(&memory);
 }
 
 static int