radeon/winsys: add uvd ring support to winsys v3

Separated from UVD patch for clarity.

v2: sync with next tree for 3.10
v3: as pointed out by Andreas Bool check for drm minor >= 32

http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.10-wip

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Andreas Boll <andreas.boll.dev@gmail.com>

src/gallium/winsys/radeon/drm/radeon_drm_cs.c

@@ -94,6 +94,10 @@
 #define RADEON_CS_RING_DMA          2
 #endif
 
+#ifndef RADEON_CS_RING_UVD
+#define RADEON_CS_RING_UVD          3
+#endif
+
 #ifndef RADEON_CS_END_OF_FRAME
 #define RADEON_CS_END_OF_FRAME      0x04
 #endif
@@ -490,6 +494,13 @@ static void radeon_drm_cs_flush(struct radeon_winsys_cs *rcs, unsigned flags)
                 cs->cst->flags[0] |= RADEON_CS_USE_VM;
             }
             break;
+
+        case RING_UVD:
+            cs->cst->flags[0] = 0;
+            cs->cst->flags[1] = RADEON_CS_RING_UVD;
+            cs->cst->cs.num_chunks = 3;
+            break;
+
         default:
         case RING_GFX:
             cs->cst->flags[0] = 0;

src/gallium/winsys/radeon/drm/radeon_drm_winsys.c

@@ -90,6 +90,14 @@
 #define RADEON_INFO_TIMESTAMP 0x11
 #endif
 
+#ifndef RADEON_INFO_RING_WORKING
+#define RADEON_INFO_RING_WORKING 0x15
+#endif
+
+#ifndef RADEON_CS_RING_UVD
+#define RADEON_CS_RING_UVD	3
+#endif
+
 static struct util_hash_table *fd_tab = NULL;
 
 /* Enable/disable feature access for one command stream.
@@ -323,6 +331,15 @@ static boolean do_winsys_init(struct radeon_drm_winsys *ws)
         ws->info.r600_has_dma = TRUE;
     }
 
+    /* Check for UVD */
+    ws->info.has_uvd = FALSE;
+    if (ws->info.drm_minor >= 32) {
+	uint32_t value = RADEON_CS_RING_UVD;
+        if (radeon_get_drm_value(ws->fd, RADEON_INFO_RING_WORKING,
+                                 "UVD Ring working", &value))
+            ws->info.has_uvd = value;
+    }
+
     /* Get GEM info. */
     retval = drmCommandWriteRead(ws->fd, DRM_RADEON_GEM_INFO,
             &gem_info, sizeof(gem_info));

src/gallium/winsys/radeon/drm/radeon_winsys.h

@@ -142,6 +142,7 @@ enum chip_class {
 enum ring_type {
     RING_GFX = 0,
     RING_DMA,
+    RING_UVD,
     RING_LAST,
 };
 
@@ -170,6 +171,8 @@ struct radeon_info {
     uint32_t                    drm_minor;
     uint32_t                    drm_patchlevel;
 
+    boolean                     has_uvd;
+
     uint32_t                    r300_num_gb_pipes;
     uint32_t                    r300_num_z_pipes;