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, 74 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_cl.c b/src/gallium/drivers/vc4/vc4_cl.c
new file mode 100644
index 00000000000..3bbeadc49ee
--- /dev/null
+++ b/src/gallium/drivers/vc4/vc4_cl.c
@@ -0,0 +1,74 @@
+/*
+ * 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 "util/u_math.h"
+#include "vc4_context.h"
+
+void
+vc4_init_cl(struct vc4_context *vc4, struct vc4_cl *cl)
+{
+#ifdef USE_VC4_SIMULATOR
+        uint32_t size = 256 * 1024;
+        cl->base = vc4_simulator_alloc(vc4->screen, size);
+        cl->end = cl->base + size;
+        cl->next = cl->base;
+#endif
+}
+
+void
+vc4_grow_cl(struct vc4_cl *cl)
+{
+        uint32_t size = MAX2((cl->end - cl->base) * 2, 4096);
+        uint32_t offset = cl->next -cl->base;
+
+#ifdef USE_VC4_SIMULATOR
+        assert(!"not reached");
+#endif
+        cl->base = realloc(cl->base, size);
+        cl->end = cl->base + size;
+        cl->next = cl->base + offset;
+}
+
+void
+vc4_reset_cl(struct vc4_cl *cl)
+{
+        assert(cl->reloc_count == 0);
+        cl->next = cl->base;
+}
+
+uint32_t
+vc4_gem_hindex(struct vc4_context *vc4, struct vc4_bo *bo)
+{
+        uint32_t hindex;
+        uint32_t *current_handles = vc4->bo_handles.base;
+
+        for (hindex = 0;
+             hindex < (vc4->bo_handles.next - vc4->bo_handles.base) / 4;
+             hindex++) {
+                if (current_handles[hindex] == bo->handle)
+                        return hindex;
+        }
+
+        cl_u32(&vc4->bo_handles, bo->handle);
+        return hindex;
+}