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

The goal is to enable testing of parts of drivers without depending on any
particular kernel version or hardware being present.

Simply set LD_PRELOAD=$PREFIX/lib/libv3d_drm_shim.so in your environment,
and we'll fake a /dev/dri/renderD128 (or whatever the next available node
is) using v3dv3.  That node can then be used with the surfaceless or gbm
EGL platforms.

Acked-by: Iago Toral Quiroga <[email protected]>

1 files changed, 70 insertions, 0 deletions

diff --git a/src/broadcom/drm-shim/v3d.h b/src/broadcom/drm-shim/v3d.h
new file mode 100644
index 00000000000..0712b8b3f24
--- /dev/null
+++ b/src/broadcom/drm-shim/v3d.h
@@ -0,0 +1,70 @@
+/*
+ * 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.
+ */
+
+#ifndef DRM_SHIM_V3D_H
+#define DRM_SHIM_V3D_H
+
+#include "broadcom/common/v3d_device_info.h"
+#include "util/vma.h"
+
+struct drm_shim_fd;
+
+struct v3d_shim_device {
+        struct v3d_hw *hw;
+        struct v3d_device_info *devinfo;
+
+        /* Base virtual address of the heap. */
+        void *mem;
+        /* Base hardware address of the heap. */
+        uint32_t mem_base;
+        /* Size of the heap. */
+        size_t mem_size;
+
+        /* Allocator for the GPU virtual addresses. */
+        struct util_vma_heap heap;
+};
+extern struct v3d_shim_device v3d;
+
+struct v3d_bo {
+        struct shim_bo base;
+        uint64_t offset;
+        void *sim_vaddr;
+        void *gem_vaddr;
+};
+
+static inline struct v3d_bo *
+v3d_bo(struct shim_bo *bo)
+{
+        return (struct v3d_bo *)bo;
+}
+
+struct v3d_bo *v3d_bo_lookup(struct shim_fd *shim_fd, int handle);
+int v3d_ioctl_wait_bo(int fd, unsigned long request, void *arg);
+int v3d_ioctl_mmap_bo(int fd, unsigned long request, void *arg);
+int v3d_ioctl_get_bo_offset(int fd, unsigned long request, void *arg);
+
+void v3d33_drm_shim_driver_init(void);
+void v3d41_drm_shim_driver_init(void);
+void v3d42_drm_shim_driver_init(void);
+
+#endif /* DRM_SHIM_V3D_H */