1 files changed, 162 insertions, 0 deletions
diff --git a/lib/mesa/src/gallium/winsys/etnaviv/drm/etnaviv_drm_winsys.c b/lib/mesa/src/gallium/winsys/etnaviv/drm/etnaviv_drm_winsys.c
new file mode 100644
index 000000000..8e3f7a06a
--- /dev/null
+++ b/lib/mesa/src/gallium/winsys/etnaviv/drm/etnaviv_drm_winsys.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2015 Etnaviv Project
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Christian Gmeiner <christian.gmeiner@gmail.com>
+ */
+
+#include <sys/stat.h>
+
+#include "util/u_hash_table.h"
+#include "util/u_memory.h"
+
+#include "etnaviv/etnaviv_screen.h"
+#include "etnaviv/hw/common.xml.h"
+#include "etnaviv_drm_public.h"
+
+#include <stdio.h>
+
+static struct pipe_screen *
+screen_create(struct renderonly *ro)
+{
+   struct etna_device *dev;
+   struct etna_gpu *gpu;
+   uint64_t val;
+   int i;
+
+   dev = etna_device_new_dup(ro->gpu_fd);
+   if (!dev) {
+      fprintf(stderr, "Error creating device\n");
+      return NULL;
+   }
+
+   for (i = 0;; i++) {
+      gpu = etna_gpu_new(dev, i);
+      if (!gpu) {
+         fprintf(stderr, "Error creating gpu\n");
+         return NULL;
+      }
+
+      /* Look for a 3D capable GPU */
+      int ret = etna_gpu_get_param(gpu, ETNA_GPU_FEATURES_0, &val);
+      if (ret == 0 && (val & chipFeatures_PIPE_3D))
+         break;
+
+      etna_gpu_del(gpu);
+   }
+
+   return etna_screen_create(dev, gpu, ro);
+}
+
+static struct util_hash_table *etna_tab = NULL;
+
+static mtx_t etna_screen_mutex = _MTX_INITIALIZER_NP;
+
+static void
+etna_drm_screen_destroy(struct pipe_screen *pscreen)
+{
+   struct etna_screen *screen = etna_screen(pscreen);
+   boolean destroy;
+
+   mtx_lock(&etna_screen_mutex);
+   destroy = --screen->refcnt == 0;
+   if (destroy) {
+      int fd = etna_device_fd(screen->dev);
+      util_hash_table_remove(etna_tab, intptr_to_pointer(fd));
+   }
+   mtx_unlock(&etna_screen_mutex);
+
+   if (destroy) {
+      pscreen->destroy = screen->winsys_priv;
+      pscreen->destroy(pscreen);
+   }
+}
+
+static unsigned hash_fd(void *key)
+{
+   int fd = pointer_to_intptr(key);
+   struct stat stat;
+
+   fstat(fd, &stat);
+
+   return stat.st_dev ^ stat.st_ino ^ stat.st_rdev;
+}
+
+static int compare_fd(void *key1, void *key2)
+{
+   int fd1 = pointer_to_intptr(key1);
+   int fd2 = pointer_to_intptr(key2);
+   struct stat stat1, stat2;
+
+   fstat(fd1, &stat1);
+   fstat(fd2, &stat2);
+
+   return stat1.st_dev != stat2.st_dev ||
+          stat1.st_ino != stat2.st_ino ||
+          stat1.st_rdev != stat2.st_rdev;
+}
+
+struct pipe_screen *
+etna_drm_screen_create_renderonly(struct renderonly *ro)
+{
+   struct pipe_screen *pscreen = NULL;
+
+   mtx_lock(&etna_screen_mutex);
+   if (!etna_tab) {
+      etna_tab = util_hash_table_create(hash_fd, compare_fd);
+      if (!etna_tab)
+         goto unlock;
+   }
+
+   pscreen = util_hash_table_get(etna_tab, intptr_to_pointer(ro->gpu_fd));
+   if (pscreen) {
+      etna_screen(pscreen)->refcnt++;
+   } else {
+      pscreen = screen_create(ro);
+      if (pscreen) {
+         int fd = etna_device_fd(etna_screen(pscreen)->dev);
+         util_hash_table_set(etna_tab, intptr_to_pointer(fd), pscreen);
+
+         /* Bit of a hack, to avoid circular linkage dependency,
+         * ie. pipe driver having to call in to winsys, we
+         * override the pipe drivers screen->destroy() */
+         etna_screen(pscreen)->winsys_priv = pscreen->destroy;
+      pscreen->destroy = etna_drm_screen_destroy;
+      }
+   }
+
+unlock:
+   mtx_unlock(&etna_screen_mutex);
+   return pscreen;
+}
+
+struct pipe_screen *
+etna_drm_screen_create(int fd)
+{
+   struct renderonly ro = {
+      .create_for_resource = renderonly_create_gpu_import_for_resource,
+      .kms_fd = -1,
+      .gpu_fd = fd
+   };
+
+   return etna_drm_screen_create_renderonly(&ro);
+}