From 1de3377555f14495c49c935810c220f014dbef71 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs@redhat.com>
Date: Wed, 1 Nov 2017 03:56:19 +1000
Subject: [PATCH] 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 | 39 ++++++++++++++++++++-------
 drivers/gpu/drm/nouveau/nouveau_ttm.c |  6 ++---
 2 files changed, 32 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 291f1a08da33..21d904ded441 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/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;
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index 3bf3b60130e0..8c4f45ea6234 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/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