freedreno: add renderonly scanout

This allows creating a fd_screen with a renderonly object which will be
used to allocated scanout resources.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Eric Anholt <eric@anholt.net>
[slight tweak to fix uninitialized 'prsc' in debug print]
Signed-off-by: Rob Clark <robdclark@gmail.com>

src/gallium/auxiliary/target-helpers/drm_helper.h

@@ -248,7 +248,7 @@ pipe_freedreno_create_screen(int fd, const struct pipe_screen_config *config)
 {
    struct pipe_screen *screen;
 
-   screen = fd_drm_screen_create(fd);
+   screen = fd_drm_screen_create(fd, NULL);
    return screen ? debug_screen_wrap(screen) : NULL;
 }
 

src/gallium/drivers/freedreno/freedreno_resource.c

@@ -663,6 +663,9 @@ fd_resource_destroy(struct pipe_screen *pscreen,
 	fd_bc_invalidate_resource(rsc, true);
 	if (rsc->bo)
 		fd_bo_del(rsc->bo);
+	if (rsc->scanout)
+		renderonly_scanout_destroy(rsc->scanout, fd_screen(pscreen)->ro);
+
 	util_range_destroy(&rsc->valid_buffer_range);
 	FREE(rsc);
 }
@@ -688,7 +691,7 @@ fd_resource_get_handle(struct pipe_screen *pscreen,
 
 	handle->modifier = fd_resource_modifier(rsc);
 
-	return fd_screen_bo_get_handle(pscreen, rsc->bo,
+	return fd_screen_bo_get_handle(pscreen, rsc->bo, rsc->scanout,
 			rsc->slices[0].pitch * rsc->cpp, handle);
 }
 
@@ -845,11 +848,37 @@ fd_resource_create_with_modifiers(struct pipe_screen *pscreen,
 		const uint64_t *modifiers, int count)
 {
 	struct fd_screen *screen = fd_screen(pscreen);
-	struct fd_resource *rsc = CALLOC_STRUCT(fd_resource);
-	struct pipe_resource *prsc = &rsc->base;
+	struct fd_resource *rsc;
+	struct pipe_resource *prsc;
 	enum pipe_format format = tmpl->format;
 	uint32_t size;
 
+	if (screen->ro && (tmpl->bind & PIPE_BIND_SCANOUT)) {
+		struct pipe_resource scanout_templat = *tmpl;
+		struct renderonly_scanout *scanout;
+		struct winsys_handle handle;
+
+		scanout = renderonly_scanout_for_resource(&scanout_templat,
+												  screen->ro, &handle);
+		if (!scanout)
+			return NULL;
+
+		renderonly_scanout_destroy(scanout, screen->ro);
+
+		assert(handle.type == WINSYS_HANDLE_TYPE_FD);
+		rsc = fd_resource(pscreen->resource_from_handle(pscreen, tmpl,
+														&handle,
+														PIPE_HANDLE_USAGE_FRAMEBUFFER_WRITE));
+		close(handle.handle);
+		if (!rsc)
+			return NULL;
+
+		return &rsc->base;
+	}
+
+	rsc = CALLOC_STRUCT(fd_resource);
+	prsc = &rsc->base;
+
 	DBG("%p: target=%d, format=%s, %ux%ux%u, array_size=%u, last_level=%u, "
 			"nr_samples=%u, usage=%u, bind=%x, flags=%x", prsc,
 			tmpl->target, util_format_name(format),
@@ -1050,6 +1079,12 @@ fd_resource_from_handle(struct pipe_screen *pscreen,
 
 	assert(rsc->cpp);
 
+	if (screen->ro) {
+		rsc->scanout =
+			renderonly_create_gpu_import_for_resource(prsc, screen->ro, NULL);
+		/* failure is expected in some cases.. */
+	}
+
 	return prsc;
 
 fail:

src/gallium/drivers/freedreno/freedreno_resource.h

@@ -72,6 +72,7 @@ struct fd_resource {
 	/* buffer range that has been initialized */
 	struct util_range valid_buffer_range;
 	bool valid;
+	struct renderonly_scanout *scanout;
 
 	/* reference to the resource holding stencil data for a z32_s8 texture */
 	/* TODO rename to secondary or auxiliary? */

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -147,6 +147,9 @@ fd_screen_destroy(struct pipe_screen *pscreen)
 	if (screen->dev)
 		fd_device_del(screen->dev);
 
+	if (screen->ro)
+		FREE(screen->ro);
+
 	fd_bc_fini(&screen->batch_cache);
 
 	slab_destroy_parent(&screen->transfer_pool);
@@ -637,6 +640,7 @@ fd_get_compiler_options(struct pipe_screen *pscreen,
 boolean
 fd_screen_bo_get_handle(struct pipe_screen *pscreen,
 		struct fd_bo *bo,
+		struct renderonly_scanout *scanout,
 		unsigned stride,
 		struct winsys_handle *whandle)
 {
@@ -645,6 +649,8 @@ fd_screen_bo_get_handle(struct pipe_screen *pscreen,
 	if (whandle->type == WINSYS_HANDLE_TYPE_SHARED) {
 		return fd_bo_get_name(bo, &whandle->handle) == 0;
 	} else if (whandle->type == WINSYS_HANDLE_TYPE_KMS) {
+		if (renderonly_get_handle(scanout, whandle))
+			return TRUE;
 		whandle->handle = fd_bo_handle(bo);
 		return TRUE;
 	} else if (whandle->type == WINSYS_HANDLE_TYPE_FD) {
@@ -713,7 +719,7 @@ fd_screen_bo_from_handle(struct pipe_screen *pscreen,
 }
 
 struct pipe_screen *
-fd_screen_create(struct fd_device *dev)
+fd_screen_create(struct fd_device *dev, struct renderonly *ro)
 {
 	struct fd_screen *screen = CALLOC_STRUCT(fd_screen);
 	struct pipe_screen *pscreen;
@@ -734,6 +740,14 @@ fd_screen_create(struct fd_device *dev)
 	screen->dev = dev;
 	screen->refcnt = 1;
 
+	if (ro) {
+		screen->ro = renderonly_dup(ro);
+		if (!screen->ro) {
+			DBG("could not create renderonly object");
+			goto fail;
+		}
+	}
+
 	// maybe this should be in context?
 	screen->pipe = fd_pipe_new(screen->dev, FD_PIPE_3D);
 	if (!screen->pipe) {

src/gallium/drivers/freedreno/freedreno_screen.h

@@ -34,6 +34,7 @@
 #include "util/u_memory.h"
 #include "util/slab.h"
 #include "os/os_thread.h"
+#include "renderonly/renderonly.h"
 
 #include "freedreno_batch_cache.h"
 #include "freedreno_perfcntr.h"
@@ -101,6 +102,8 @@ struct fd_screen {
 
 	unsigned num_supported_modifiers;
 	const uint64_t *supported_modifiers;
+
+	struct renderonly *ro;
 };
 
 static inline struct fd_screen *
@@ -111,12 +114,14 @@ fd_screen(struct pipe_screen *pscreen)
 
 boolean fd_screen_bo_get_handle(struct pipe_screen *pscreen,
 		struct fd_bo *bo,
+		struct renderonly_scanout *scanout,
 		unsigned stride,
 		struct winsys_handle *whandle);
 struct fd_bo * fd_screen_bo_from_handle(struct pipe_screen *pscreen,
 		struct winsys_handle *whandle);
 
-struct pipe_screen * fd_screen_create(struct fd_device *dev);
+struct pipe_screen *
+fd_screen_create(struct fd_device *dev, struct renderonly *ro);
 
 static inline boolean
 is_a20x(struct fd_screen *screen)

src/gallium/targets/pipe-loader/pipe_msm.c

@@ -8,7 +8,7 @@ create_screen(int fd, const struct pipe_screen_config *config)
 {
    struct pipe_screen *screen;
 
-   screen = fd_drm_screen_create(fd);
+   screen = fd_drm_screen_create(fd, NULL);
    if (!screen)
       return NULL;
 

src/gallium/winsys/freedreno/drm/freedreno_drm_public.h

@@ -3,7 +3,8 @@
 #define __FREEDRENO_DRM_PUBLIC_H__
 
 struct pipe_screen;
+struct renderonly;
 
-struct pipe_screen *fd_drm_screen_create(int drmFD);
+struct pipe_screen *fd_drm_screen_create(int drmFD, struct renderonly *ro);
 
 #endif

src/gallium/winsys/freedreno/drm/freedreno_drm_winsys.c

@@ -85,7 +85,7 @@ static int compare_fd(void *key1, void *key2)
 }
 
 struct pipe_screen *
-fd_drm_screen_create(int fd)
+fd_drm_screen_create(int fd, struct renderonly *ro)
 {
 	struct pipe_screen *pscreen = NULL;
 
@@ -104,7 +104,7 @@ fd_drm_screen_create(int fd)
 		if (!dev)
 			goto unlock;
 
-		pscreen = fd_screen_create(dev);
+		pscreen = fd_screen_create(dev, ro);
 		if (pscreen) {
 			int fd = fd_device_fd(dev);