drm/nvc0: implement channel structure initialisation

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 20 insertions, 4 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_object.c b/drivers/gpu/drm/nouveau/nouveau_object.c
index c64fd971b867..d77b1fcd19d4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_object.c
+++ b/drivers/gpu/drm/nouveau/nouveau_object.c
@@ -779,6 +779,25 @@ nouveau_gpuobj_channel_init(struct nouveau_channel *chan,
 
         NV_DEBUG(dev, "ch%d vram=0x%08x tt=0x%08x\n", chan->id, vram_h, tt_h);
 
+        if (dev_priv->card_type == NV_C0) {
+                struct nouveau_vm *vm = dev_priv->chan_vm;
+                struct nouveau_vm_pgd *vpgd;
+
+                ret = nouveau_gpuobj_new(dev, NULL, 4096, 0x1000, 0,
+                                         &chan->ramin);
+                if (ret)
+                        return ret;
+
+                nouveau_vm_ref(vm, &chan->vm, NULL);
+
+                vpgd = list_first_entry(&vm->pgd_list, struct nouveau_vm_pgd, head);
+                nv_wo32(chan->ramin, 0x0200, lower_32_bits(vpgd->obj->vinst));
+                nv_wo32(chan->ramin, 0x0204, upper_32_bits(vpgd->obj->vinst));
+                nv_wo32(chan->ramin, 0x0208, 0xffffffff);
+                nv_wo32(chan->ramin, 0x020c, 0x000000ff);
+                return 0;
+        }
+
         /* Allocate a chunk of memory for per-channel object storage */
         ret = nouveau_gpuobj_channel_init_pramin(chan);
         if (ret) {
@@ -786,7 +805,7 @@ nouveau_gpuobj_channel_init(struct nouveau_channel *chan,
                 return ret;
         }
 
-        /* NV50/NVC0 VM
+        /* NV50 VM
          *  - Allocate per-channel page-directory
          *  - Link with shared channel VM
          */
@@ -884,9 +903,6 @@ nouveau_gpuobj_channel_takedown(struct nouveau_channel *chan)
 
         NV_DEBUG(dev, "ch%d\n", chan->id);
 
-        if (!chan->ramht)
-                return;
-
         nouveau_ramht_ref(NULL, &chan->ramht, chan);
 
         nouveau_vm_ref(NULL, &chan->vm, chan->vm_pd);