drm/nouveau: allow gpuobj vinst to be a virtual address when necessary

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

diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index 4c5fc9c..2cd87e6 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -158,6 +158,7 @@ enum nouveau_flags {
 #define NVOBJ_FLAG_DONT_MAP             (1 << 0)
 #define NVOBJ_FLAG_ZERO_ALLOC          (1 << 1)
 #define NVOBJ_FLAG_ZERO_FREE           (1 << 2)
+#define NVOBJ_FLAG_VM                  (1 << 3)
 
 #define NVOBJ_CINST_GLOBAL     0xdeadbeef
 

diff --git a/drivers/gpu/drm/nouveau/nv50_instmem.c b/drivers/gpu/drm/nouveau/nv50_instmem.c
index ec102bd..e2efd6f 100644 (file)
--- a/drivers/gpu/drm/nouveau/nv50_instmem.c
+++ b/drivers/gpu/drm/nouveau/nv50_instmem.c
@@ -302,6 +302,7 @@ nv50_instmem_resume(struct drm_device *dev)
 
 struct nv50_gpuobj_node {
        struct nouveau_vram *vram;
+       struct nouveau_vma chan_vma;
        u32 align;
 };
 
@@ -310,6 +311,7 @@ int
 nv50_instmem_get(struct nouveau_gpuobj *gpuobj, u32 size, u32 align)
 {
        struct drm_device *dev = gpuobj->dev;
+       struct drm_nouveau_private *dev_priv = dev->dev_private;
        struct nv50_gpuobj_node *node = NULL;
        int ret;
 
@@ -328,8 +330,23 @@ nv50_instmem_get(struct nouveau_gpuobj *gpuobj, u32 size, u32 align)
        }
 
        gpuobj->vinst = node->vram->offset;
-       gpuobj->size  = size;
-       gpuobj->node  = node;
+
+       if (gpuobj->flags & NVOBJ_FLAG_VM) {
+               ret = nouveau_vm_get(dev_priv->chan_vm, size, 12,
+                                    NV_MEM_ACCESS_RW | NV_MEM_ACCESS_SYS,
+                                    &node->chan_vma);
+               if (ret) {
+                       nv50_vram_del(dev, &node->vram);
+                       kfree(node);
+                       return ret;
+               }
+
+               nouveau_vm_map(&node->chan_vma, node->vram);
+               gpuobj->vinst = node->chan_vma.offset;
+       }
+
+       gpuobj->size = size;
+       gpuobj->node = node;
        return 0;
 }
 
@@ -342,6 +359,10 @@ nv50_instmem_put(struct nouveau_gpuobj *gpuobj)
        node = gpuobj->node;
        gpuobj->node = NULL;
 
+       if (node->chan_vma.node) {
+               nouveau_vm_unmap(&node->chan_vma);
+               nouveau_vm_put(&node->chan_vma);
+       }
        nv50_vram_del(dev, &node->vram);
        kfree(node);
 }