drm/nv50: implement global channel address space on new VM code
As of this commit, it's guaranteed that if an object is in VRAM that its
GPU virtual address will be constant.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/nv50_instmem.c b/drivers/gpu/drm/nouveau/nv50_instmem.c
index 4ba8f74..08202fd 100644
--- a/drivers/gpu/drm/nouveau/nv50_instmem.c
+++ b/drivers/gpu/drm/nouveau/nv50_instmem.c
@@ -131,6 +131,7 @@
struct nouveau_channel *chan;
struct nouveau_vm *vm;
int ret, i;
+ u64 nongart_o;
u32 tmp;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -215,37 +216,18 @@
for (i = 0; i < 8; i++)
nv_wr32(dev, 0x1900 + (i*4), 0);
- /* Determine VM layout */
- dev_priv->vm_gart_base = roundup(NV50_VM_BLOCK, NV50_VM_BLOCK);
- dev_priv->vm_gart_size = NV50_VM_BLOCK;
+ /* Create shared channel VM, space is reserved for GART mappings at
+ * the beginning of this address space, it's managed separately
+ * because TTM makes life painful
+ */
+ dev_priv->vm_gart_base = 0x0020000000ULL;
+ dev_priv->vm_gart_size = 512 * 1024 * 1024;
+ nongart_o = dev_priv->vm_gart_base + dev_priv->vm_gart_size;
- dev_priv->vm_vram_base = dev_priv->vm_gart_base + dev_priv->vm_gart_size;
- dev_priv->vm_vram_size = dev_priv->vram_size;
- if (dev_priv->vm_vram_size > NV50_VM_MAX_VRAM)
- dev_priv->vm_vram_size = NV50_VM_MAX_VRAM;
- dev_priv->vm_vram_size = roundup(dev_priv->vm_vram_size, NV50_VM_BLOCK);
- dev_priv->vm_vram_pt_nr = dev_priv->vm_vram_size / NV50_VM_BLOCK;
-
- dev_priv->vm_end = dev_priv->vm_vram_base + dev_priv->vm_vram_size;
-
- NV_DEBUG(dev, "NV50VM: GART 0x%016llx-0x%016llx\n",
- dev_priv->vm_gart_base,
- dev_priv->vm_gart_base + dev_priv->vm_gart_size - 1);
- NV_DEBUG(dev, "NV50VM: VRAM 0x%016llx-0x%016llx\n",
- dev_priv->vm_vram_base,
- dev_priv->vm_vram_base + dev_priv->vm_vram_size - 1);
-
- /* VRAM page table(s), mapped into VM at +1GiB */
- for (i = 0; i < dev_priv->vm_vram_pt_nr; i++) {
- ret = nouveau_gpuobj_new(dev, NULL, NV50_VM_BLOCK / 0x10000 * 8,
- 0, NVOBJ_FLAG_ZERO_ALLOC,
- &dev_priv->vm_vram_pt[i]);
- if (ret) {
- NV_ERROR(dev, "Error creating VRAM PGT: %d\n", ret);
- dev_priv->vm_vram_pt_nr = i;
- return ret;
- }
- }
+ ret = nouveau_vm_new(dev, 0, (1ULL << 40), nongart_o,
+ 29, 12, 16, &dev_priv->chan_vm);
+ if (ret)
+ return ret;
return 0;
@@ -269,9 +251,7 @@
dev_priv->ramin_available = false;
- for (i = 0; i < dev_priv->vm_vram_pt_nr; i++)
- nouveau_gpuobj_ref(NULL, &dev_priv->vm_vram_pt[i]);
- dev_priv->vm_vram_pt_nr = 0;
+ nouveau_vm_ref(NULL, &dev_priv->chan_vm, NULL);
for (i = 0x1700; i <= 0x1710; i += 4)
nv_wr32(dev, i, priv->save1700[(i - 0x1700) / 4]);