drm/nouveau/abi16: implement limited interoperability with usif/nvif

[deliverable/linux.git] / drivers / gpu / drm / nouveau / nouveau_abi16.c

diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c
index 998f5cb2dfac24fbacb1a1c2f075cf38d5c02a0d..7f50cf5f929e9f025e77f74b1fc2ce638de98bd1 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.c
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c
@@ -25,6 +25,7 @@
 #include <nvif/driver.h>
 #include <nvif/ioctl.h>
 #include <nvif/class.h>
+#include <nvif/unpack.h>
 
 #include "nouveau_drm.h"
 #include "nouveau_dma.h"
@@ -346,6 +347,44 @@ nouveau_abi16_chan(struct nouveau_abi16 *abi16, int channel)
        return NULL;
 }
 
+int
+nouveau_abi16_usif(struct drm_file *file_priv, void *data, u32 size)
+{
+       union {
+               struct nvif_ioctl_v0 v0;
+       } *args = data;
+       struct nouveau_abi16_chan *chan;
+       struct nouveau_abi16 *abi16;
+       int ret;
+
+       if (nvif_unpack(args->v0, 0, 0, true)) {
+               switch (args->v0.type) {
+               case NVIF_IOCTL_V0_NEW:
+               case NVIF_IOCTL_V0_MTHD:
+               case NVIF_IOCTL_V0_SCLASS:
+                       break;
+               default:
+                       return -EACCES;
+               }
+       } else
+               return ret;
+
+       if (!(abi16 = nouveau_abi16(file_priv)))
+               return -ENOMEM;
+
+       if (args->v0.token != ~0ULL) {
+               if (!(chan = nouveau_abi16_chan(abi16, args->v0.token)))
+                       return -EINVAL;
+               args->v0.object = nvif_handle(&chan->chan->user);
+               args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
+               return 0;
+       }
+
+       args->v0.object = nvif_handle(&abi16->device.object);
+       args->v0.owner  = NVIF_IOCTL_V0_OWNER_ANY;
+       return 0;
+}
+
 int
 nouveau_abi16_ioctl_channel_free(ABI16_IOCTL_ARGS)
 {