vc4: Initial skeleton driver import.

This mostly just takes every draw call and turns it into a sequence of
commands that clear the FBO and draw a single shaded triangle to it,
regardless of the actual input vertices or shaders.  I copied the initial
driver skeleton mostly from freedreno, and I've preserved Rob Clark's
copyright for those.  I also based my initial hardcoded shaders and
command lists on Scott Mansell (phire)'s "hackdriver" project, though the
bit patterns of the shaders emitted end up being different.

v2: Rebase on gallium megadrivers changes.
v3: Rebase on PIPE_SHADER_CAP_MAX_CONSTS change.
v4: Rely on simpenrose actually being installed when building for
    simulation.
v5: Add more header duplicate-include guards.
v6: Apply Emil's review (protection against vc4 sim and ilo at the same
    time, and dropping the dricommon drm bits) and fix a copyright header
    (thanks, Roland)

1 files changed, 173 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_bufmgr.c b/src/gallium/drivers/vc4/vc4_bufmgr.c
new file mode 100644
index 00000000000..6cf7d163dd0
--- /dev/null
+++ b/src/gallium/drivers/vc4/vc4_bufmgr.c
@@ -0,0 +1,173 @@
+/*
+ * Copyright © 2014 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 <errno.h>
+#include <err.h>
+#include <stdio.h>
+#include <sys/mman.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#include "util/u_memory.h"
+
+#include "vc4_context.h"
+#include "vc4_screen.h"
+
+struct vc4_bo *
+vc4_bo_alloc(struct vc4_screen *screen, uint32_t size, const char *name)
+{
+        struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
+        if (!bo)
+                return NULL;
+
+        pipe_reference_init(&bo->reference, 1);
+        bo->screen = screen;
+        bo->size = size;
+        bo->name = name;
+
+#ifndef USE_VC4_SIMULATOR
+        struct drm_mode_create_dumb create;
+        memset(&create, 0, sizeof(create));
+
+        create.width = 128;
+        create.bpp = 8;
+        create.height = (size + 127) / 128;
+
+        int ret = drmIoctl(screen->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create);
+        if (ret != 0)
+                errx(1, "create ioctl");
+
+        bo->handle = create.handle;
+        assert(create.size >= size);
+#else /* USE_VC4_SIMULATOR */
+        bo->map = vc4_simulator_alloc(screen, size);
+#endif /* USE_VC4_SIMULATOR */
+
+        return bo;
+}
+
+void
+vc4_bo_free(struct vc4_bo *bo)
+{
+#ifndef USE_VC4_SIMULATOR
+        struct vc4_screen *screen = bo->screen;
+
+        struct drm_gem_close c;
+        c.handle = bo->handle;
+        int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_CLOSE, &c);
+        if (ret != 0)
+                fprintf(stderr, "close object %d: %s\n", bo->handle, strerror(errno));
+#endif
+
+        free(bo);
+}
+
+struct vc4_bo *
+vc4_bo_open_name(struct vc4_screen *screen, uint32_t name,
+                 uint32_t winsys_stride)
+{
+        struct vc4_bo *bo = CALLOC_STRUCT(vc4_bo);
+
+        struct drm_gem_open o;
+        o.name = name;
+        int ret = drmIoctl(screen->fd, DRM_IOCTL_GEM_OPEN, &o);
+        if (ret) {
+                fprintf(stderr, "Failed to open bo %d: %s\n",
+                        name, strerror(errno));
+                free(bo);
+                return NULL;
+        }
+
+        pipe_reference_init(&bo->reference, 1);
+        bo->screen = screen;
+        bo->handle = o.handle;
+        bo->size = o.size;
+
+#ifdef USE_VC4_SIMULATOR
+        vc4_bo_map(bo);
+        bo->simulator_winsys_map = bo->map;
+        bo->simulator_winsys_stride = winsys_stride;
+        bo->map = vc4_simulator_alloc(screen, bo->size);
+#endif
+
+        return bo;
+}
+
+struct vc4_bo *
+vc4_bo_alloc_mem(struct vc4_screen *screen, const void *data, uint32_t size,
+                 const char *name)
+{
+        void *map;
+        struct vc4_bo *bo;
+
+        bo = vc4_bo_alloc(screen, size, name);
+        map = vc4_bo_map(bo);
+        memcpy(map, data, size);
+        return bo;
+}
+
+bool
+vc4_bo_flink(struct vc4_bo *bo, uint32_t *name)
+{
+#ifndef USE_VC4_SIMULATOR
+        struct drm_gem_flink flink = {
+                .handle = bo->handle,
+        };
+        int ret = drmIoctl(bo->screen->fd, DRM_IOCTL_GEM_FLINK, &flink);
+        if (ret) {
+                fprintf(stderr, "Failed to flink bo %d: %s\n",
+                        bo->handle, strerror(errno));
+                free(bo);
+                return false;
+        }
+
+        *name = flink.name;
+#endif /* USE_VC4_SIMULATOR */
+
+        return true;
+}
+
+void *
+vc4_bo_map(struct vc4_bo *bo)
+{
+        int ret;
+
+        if (bo->map)
+                return bo->map;
+
+        struct drm_mode_map_dumb map;
+        memset(&map, 0, sizeof(map));
+        map.handle = bo->handle;
+        ret = drmIoctl(bo->screen->fd, DRM_IOCTL_MODE_MAP_DUMB, &map);
+        if (ret != 0)
+                errx(1, "map ioctl");
+
+        bo->map = mmap(NULL, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
+                       bo->screen->fd, map.offset);
+        if (bo->map == MAP_FAILED) {
+                errx(1, "mmap of bo %d (offset 0x%016llx, size %d) failed\n",
+                     bo->handle, (long long)map.offset, bo->size);
+        }
+
+        return bo->map;
+}