v3d: Introduce a DRM shim for calling out to the simulator.

[mesa.git] / src / drm-shim / drm_shim.h

diff --git a/src/drm-shim/drm_shim.h b/src/drm-shim/drm_shim.h
new file mode 100644 (file)
index 0000000..b14353a
--- /dev/null
+++ b/src/drm-shim/drm_shim.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright © 2018 Broadcom
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  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.
+ */
+
+#include "util/macros.h"
+#include "util/hash_table.h"
+
+#ifdef __linux__
+#define DRM_MAJOR 226
+#endif
+
+typedef int (*ioctl_fn_t)(int fd, unsigned long request, void *arg);
+
+struct shim_bo;
+
+struct shim_device {
+   /* Mapping from int fd to struct shim_fd *. */
+   struct hash_table *fd_map;
+
+   int (**driver_ioctls)(int fd, unsigned long request, void *arg);
+   int driver_ioctl_count;
+
+   void (*driver_bo_free)(struct shim_bo *bo);
+
+   /* Returned by drmGetVersion(). */
+   const char *driver_name;
+};
+
+extern struct shim_device shim_device;
+
+struct shim_fd {
+   int fd;
+   /* mapping from int gem handle to struct shim_bo *. */
+   struct hash_table *handles;
+};
+
+struct shim_bo {
+   int fd;
+   void *map;
+   int refcount;
+   uint32_t size;
+};
+
+/* Core support. */
+extern int render_node_minor;
+void drm_shim_device_init(void);
+void drm_shim_override_file(const char *contents,
+                            const char *path_format, ...) PRINTFLIKE(2, 3);
+void drm_shim_fd_register(int fd, struct shim_fd *shim_fd);
+struct shim_fd *drm_shim_fd_lookup(int fd);
+int drm_shim_ioctl(int fd, unsigned long request, void *arg);
+void *drm_shim_mmap(struct shim_fd *shim_fd, size_t length, int prot, int flags,
+                    int fd, off_t offset);
+
+void drm_shim_bo_init(struct shim_bo *bo, size_t size);
+void drm_shim_bo_get(struct shim_bo *bo);
+void drm_shim_bo_put(struct shim_bo *bo);
+struct shim_bo *drm_shim_bo_lookup(struct shim_fd *shim_fd, int handle);
+int drm_shim_bo_get_handle(struct shim_fd *shim_fd, struct shim_bo *bo);
+uint64_t drm_shim_bo_get_mmap_offset(struct shim_fd *shim_fd,
+                                     struct shim_bo *bo);
+
+/* driver-specific hooks. */
+void drm_shim_driver_init(void);