drm/nv50: add more 0x100c80 flushy magic

Fixes the !vbo_fifo path in the 3D driver on certain chipsets.  Still not
really any good idea of what exactly the magic achieves, but it makes
things work.

While we're at it, in the PCIEGART path, flush on unbinding also.

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

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 2dc09db..a4d5ecc 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -347,6 +347,20 @@ nv50_mem_vm_bind_linear(struct drm_device *dev, uint64_t virt, uint32_t size,
                return -EBUSY;
        }
 
+       nv_wr32(dev, 0x100c80, 0x00040001);
+       if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
+               NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
+               NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
+               return -EBUSY;
+       }
+
+       nv_wr32(dev, 0x100c80, 0x00060001);
+       if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
+               NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
+               NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
+               return -EBUSY;
+       }
+
        return 0;
 }
 
@@ -387,6 +401,20 @@ nv50_mem_vm_unbind(struct drm_device *dev, uint64_t virt, uint32_t size)
        if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
                NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
                NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
+               return;
+       }
+
+       nv_wr32(dev, 0x100c80, 0x00040001);
+       if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
+               NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
+               NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
+               return;
+       }
+
+       nv_wr32(dev, 0x100c80, 0x00060001);
+       if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
+               NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
+               NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
        }
 }
 

diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
index ed15905..554fb45 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
+++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
@@ -171,6 +171,24 @@ nouveau_sgdma_unbind(struct ttm_backend *be)
        }
        dev_priv->engine.instmem.finish_access(nvbe->dev);
 
+       if (dev_priv->card_type == NV_50) {
+               nv_wr32(dev, 0x100c80, 0x00050001);
+               if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
+                       NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
+                       NV_ERROR(dev, "0x100c80 = 0x%08x\n",
+                                               nv_rd32(dev, 0x100c80));
+                       return -EBUSY;
+               }
+
+               nv_wr32(dev, 0x100c80, 0x00000001);
+               if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
+                       NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
+                       NV_ERROR(dev, "0x100c80 = 0x%08x\n",
+                                               nv_rd32(dev, 0x100c80));
+                       return -EBUSY;
+               }
+       }
+
        nvbe->bound = false;
        return 0;
 }