d3d12/llvmpipe/softpipe: Add support for get_screen_fd

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21654>

src/gallium/drivers/d3d12/d3d12_screen.cpp

@@ -1231,6 +1231,18 @@ d3d12_interop_export_object(struct pipe_screen *pscreen, struct pipe_resource *r
    return sizeof(*info);
 }
 
+static int
+d3d12_screen_get_fd(struct pipe_screen *pscreen)
+{
+   struct d3d12_screen *screen = d3d12_screen(pscreen);
+   struct sw_winsys *winsys = screen->winsys;
+
+   if (winsys->get_fd)
+      return winsys->get_fd(winsys);
+   else
+      return -1;
+}
+
 bool
 d3d12_init_screen_base(struct d3d12_screen *screen, struct sw_winsys *winsys, LUID *adapter_luid)
 {
@@ -1257,6 +1269,7 @@ d3d12_init_screen_base(struct d3d12_screen *screen, struct sw_winsys *winsys, LU
 
    screen->base.get_vendor = d3d12_get_vendor;
    screen->base.get_device_vendor = d3d12_get_device_vendor;
+   screen->base.get_screen_fd = d3d12_screen_get_fd;
    screen->base.get_param = d3d12_get_param;
    screen->base.get_paramf = d3d12_get_paramf;
    screen->base.get_shader_param = d3d12_get_shader_param;

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -964,6 +964,18 @@ lp_get_disk_shader_cache(struct pipe_screen *_screen)
    return screen->disk_shader_cache;
 }
 
+static int
+llvmpipe_screen_get_fd(struct pipe_screen *_screen)
+{
+   struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
+   struct sw_winsys *winsys = screen->winsys;
+
+   if (winsys->get_fd)
+      return winsys->get_fd(winsys);
+   else
+      return -1;
+}
+
 
 void
 lp_disk_cache_find_shader(struct llvmpipe_screen *screen,
@@ -1066,6 +1078,7 @@ llvmpipe_create_screen(struct sw_winsys *winsys)
    screen->base.get_name = llvmpipe_get_name;
    screen->base.get_vendor = llvmpipe_get_vendor;
    screen->base.get_device_vendor = llvmpipe_get_vendor; // TODO should be the CPU vendor
+   screen->base.get_screen_fd = llvmpipe_screen_get_fd;
    screen->base.get_param = llvmpipe_get_param;
    screen->base.get_shader_param = llvmpipe_get_shader_param;
    screen->base.get_compute_param = llvmpipe_get_compute_param;

src/gallium/drivers/softpipe/sp_screen.c

@@ -572,6 +572,17 @@ softpipe_get_compute_param(struct pipe_screen *_screen,
    return 0;
 }
 
+static int
+softpipe_screen_get_fd(struct pipe_screen *screen)
+{
+   struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
+
+   if (winsys->get_fd)
+      return winsys->get_fd(winsys);
+   else
+      return -1;
+}
+
 /**
  * Create a new pipe_screen object
  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
@@ -593,6 +604,7 @@ softpipe_create_screen(struct sw_winsys *winsys)
    screen->base.get_name = softpipe_get_name;
    screen->base.get_vendor = softpipe_get_vendor;
    screen->base.get_device_vendor = softpipe_get_vendor; // TODO should be the CPU vendor
+   screen->base.get_screen_fd = softpipe_screen_get_fd;
    screen->base.get_param = softpipe_get_param;
    screen->base.get_shader_param = softpipe_get_shader_param;
    screen->base.get_paramf = softpipe_get_paramf;

src/gallium/include/frontend/sw_winsys.h

@@ -66,6 +66,9 @@ struct sw_winsys
    void 
    (*destroy)( struct sw_winsys *ws );
 
+   int
+   (*get_fd)( struct sw_winsys *ws );
+
    bool
    (*is_displaytarget_format_supported)( struct sw_winsys *ws,
                                          unsigned tex_usage,

src/gallium/winsys/sw/kms-dri/kms_dri_sw_winsys.c

@@ -491,6 +491,13 @@ kms_sw_displaytarget_display(struct sw_winsys *ws,
    assert(0);
 }
 
+static int
+kms_sw_winsys_get_fd(struct sw_winsys *ws)
+{
+   struct kms_sw_winsys *kms_sw = kms_sw_winsys(ws);
+
+   return kms_sw->fd;
+}
 
 static void
 kms_destroy_sw_winsys(struct sw_winsys *winsys)
@@ -512,6 +519,8 @@ kms_dri_create_winsys(int fd)
 
    ws->base.destroy = kms_destroy_sw_winsys;
 
+   ws->base.get_fd = kms_sw_winsys_get_fd;
+
    ws->base.is_displaytarget_format_supported = kms_sw_is_displaytarget_format_supported;
 
    /* screen texture functions */