svga/winsys: Propagate surface shared information to the winsys

The linux winsys needs to know whether a surface is shared.
For guest-backed surfaces we need this information to avoid allocating a
mob out of the mob cache for shared surfaces, but instead allocate a shared
mob, that is never put in the mob cache, from the kernel.

Also previously, all surfaces were given the "shareable" attribute when
allocated from the kernel. This is too permissive for client-local surfaces.
Now that we have the needed info, only set the "shareable" attribute if the
client indicates that it needs to share the surface.

Signed-off-by: Thomas Hellstrom <[email protected]>
Reviewed-by: Jakob Bornecrantz <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Cc: "10.1" <[email protected]>

3 files changed, 29 insertions, 24 deletions

diff --git a/src/gallium/winsys/svga/drm/vmw_screen.h b/src/gallium/winsys/svga/drm/vmw_screen.h
index f9da3693c58..b68bf431e5e 100644
--- a/src/gallium/winsys/svga/drm/vmw_screen.h
+++ b/src/gallium/winsys/svga/drm/vmw_screen.h
@@ -119,15 +119,17 @@ vmw_ioctl_context_destroy(struct vmw_winsys_screen *vws,
 
 uint32
 vmw_ioctl_surface_create(struct vmw_winsys_screen *vws,
-                              SVGA3dSurfaceFlags flags,
-                              SVGA3dSurfaceFormat format,
-                              SVGA3dSize size,
-                              uint32 numFaces,
-                              uint32 numMipLevels);
+                         SVGA3dSurfaceFlags flags,
+                         SVGA3dSurfaceFormat format,
+                         unsigned usage,
+                         SVGA3dSize size,
+                         uint32 numFaces,
+                         uint32 numMipLevels);
 uint32
 vmw_ioctl_gb_surface_create(struct vmw_winsys_screen *vws,
 			    SVGA3dSurfaceFlags flags,
 			    SVGA3dSurfaceFormat format,
+                            unsigned usage,
 			    SVGA3dSize size,
 			    uint32 numFaces,
 			    uint32 numMipLevels,
diff --git a/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c b/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
index 501c047c32a..b7bedb1c26c 100644
--- a/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
+++ b/src/gallium/winsys/svga/drm/vmw_screen_ioctl.c
@@ -109,10 +109,11 @@ vmw_ioctl_context_destroy(struct vmw_winsys_screen *vws, uint32 cid)
 
 uint32
 vmw_ioctl_surface_create(struct vmw_winsys_screen *vws,
-			      SVGA3dSurfaceFlags flags,
-			      SVGA3dSurfaceFormat format,
-			      SVGA3dSize size,
-			      uint32_t numFaces, uint32_t numMipLevels)
+                         SVGA3dSurfaceFlags flags,
+                         SVGA3dSurfaceFormat format,
+                         unsigned usage,
+                         SVGA3dSize size,
+                         uint32_t numFaces, uint32_t numMipLevels)
 {
    union drm_vmw_surface_create_arg s_arg;
    struct drm_vmw_surface_create_req *req = &s_arg.req;
@@ -139,7 +140,7 @@ vmw_ioctl_surface_create(struct vmw_winsys_screen *vws,
       req->scanout = false;
    }
    req->format = (uint32_t) format;
-   req->shareable = 1;
+   req->shareable = !!(usage & SVGA_SURFACE_USAGE_SHARED);
 
    assert(numFaces * numMipLevels < DRM_VMW_MAX_SURFACE_FACES*
 	  DRM_VMW_MAX_MIP_LEVELS);
@@ -180,6 +181,7 @@ uint32
 vmw_ioctl_gb_surface_create(struct vmw_winsys_screen *vws,
 			    SVGA3dSurfaceFlags flags,
 			    SVGA3dSurfaceFormat format,
+                            unsigned usage,
 			    SVGA3dSize size,
 			    uint32_t numFaces,
 			    uint32_t numMipLevels,
@@ -208,7 +210,8 @@ vmw_ioctl_gb_surface_create(struct vmw_winsys_screen *vws,
       req->svga3d_flags = (uint32_t) flags;
    }
    req->format = (uint32_t) format;
-   req->drm_surface_flags |= drm_vmw_surface_flag_shareable; 
+   if (usage & SVGA_SURFACE_USAGE_SHARED)
+      req->drm_surface_flags |= drm_vmw_surface_flag_shareable;
    req->drm_surface_flags |= drm_vmw_surface_flag_create_buffer; 
 
    assert(numFaces * numMipLevels < DRM_VMW_MAX_SURFACE_FACES*
diff --git a/src/gallium/winsys/svga/drm/vmw_screen_svga.c b/src/gallium/winsys/svga/drm/vmw_screen_svga.c
index bfba2038559..6d592f2a957 100644
--- a/src/gallium/winsys/svga/drm/vmw_screen_svga.c
+++ b/src/gallium/winsys/svga/drm/vmw_screen_svga.c
@@ -135,6 +135,7 @@ static struct svga_winsys_surface *
 vmw_svga_winsys_surface_create(struct svga_winsys_screen *sws,
                                SVGA3dSurfaceFlags flags,
                                SVGA3dSurfaceFormat format,
+                               unsigned usage,
                                SVGA3dSize size,
                                uint32 numFaces,
                                uint32 numMipLevels)
@@ -142,7 +143,7 @@ vmw_svga_winsys_surface_create(struct svga_winsys_screen *sws,
    struct vmw_winsys_screen *vws = vmw_winsys_screen(sws);
    struct vmw_svga_winsys_surface *surface;
    struct vmw_buffer_desc desc;
-   struct pb_manager *provider = vws->pools.mob_fenced;
+   struct pb_manager *provider;
    uint32_t buffer_size;
 
 
@@ -155,6 +156,8 @@ vmw_svga_winsys_surface_create(struct svga_winsys_screen *sws,
    p_atomic_set(&surface->validated, 0);
    surface->screen = vws;
    pipe_mutex_init(surface->mutex);
+   surface->shared = !!(usage & SVGA_SURFACE_USAGE_SHARED);
+   provider = (surface->shared) ? vws->pools.gmr : vws->pools.mob_fenced;
 
    /*
     * Used for the backing buffer GB surfaces, and to approximate
@@ -169,7 +172,7 @@ vmw_svga_winsys_surface_create(struct svga_winsys_screen *sws,
        * buffer out of the buffer cache. Otherwise, let the kernel allocate
        * a suitable buffer for us.
        */
-      if (buffer_size < VMW_TRY_CACHED_SIZE) {
+      if (buffer_size < VMW_TRY_CACHED_SIZE && !surface->shared) {
          struct pb_buffer *pb_buf;
 
          surface->size = buffer_size;
@@ -181,10 +184,9 @@ vmw_svga_winsys_surface_create(struct svga_winsys_screen *sws,
             assert(0);
       }
 
-      surface->sid = vmw_ioctl_gb_surface_create(vws,
-						 flags, format, size,
-						 numFaces, numMipLevels,
-                                                 ptr.gmrId,
+      surface->sid = vmw_ioctl_gb_surface_create(vws, flags, format, usage,
+                                                 size, numFaces,
+                                                 numMipLevels, ptr.gmrId,
                                                  surface->buf ? NULL :
 						 &desc.region);
 
@@ -198,10 +200,9 @@ vmw_svga_winsys_surface_create(struct svga_winsys_screen *sws,
           */
          vmw_svga_winsys_buffer_destroy(sws, surface->buf);
          surface->buf = NULL;
-         surface->sid = vmw_ioctl_gb_surface_create(vws,
-                                                    flags, format, size,
-                                                    numFaces, numMipLevels,
-                                                    0,
+         surface->sid = vmw_ioctl_gb_surface_create(vws, flags, format, usage,
+                                                    size, numFaces,
+                                                    numMipLevels, 0,
                                                     &desc.region);
          if (surface->sid == SVGA3D_INVALID_ID)
             goto no_sid;
@@ -227,9 +228,8 @@ vmw_svga_winsys_surface_create(struct svga_winsys_screen *sws,
          }
       }
    } else {
-      surface->sid = vmw_ioctl_surface_create(vws,
-                                              flags, format, size,
-                                              numFaces, numMipLevels);
+      surface->sid = vmw_ioctl_surface_create(vws, flags, format, usage,
+                                              size, numFaces, numMipLevels);
       if(surface->sid == SVGA3D_INVALID_ID)
          goto no_sid;