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, 132 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_cl.h b/src/gallium/drivers/vc4/vc4_cl.h
new file mode 100644
index 00000000000..a892444d9c7
--- /dev/null
+++ b/src/gallium/drivers/vc4/vc4_cl.h
@@ -0,0 +1,132 @@
+/*
+ * 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.
+ */
+
+#ifndef VC4_CL_H
+#define VC4_CL_H
+
+#include <stdint.h>
+
+#include "util/u_math.h"
+
+#ifdef USE_VC4_SIMULATOR
+#include "simpenrose/simpenrose.h"
+#endif
+
+#include "vc4_packet.h"
+
+struct vc4_bo;
+
+struct vc4_cl {
+        void *base;
+        void *next;
+        void *end;
+        uint32_t reloc_next;
+        uint32_t reloc_count;
+};
+
+void vc4_init_cl(struct vc4_context *vc4, struct vc4_cl *cl);
+void vc4_grow_cl(struct vc4_cl *cl);
+void vc4_reset_cl(struct vc4_cl *cl);
+uint32_t vc4_gem_hindex(struct vc4_context *vc4, struct vc4_bo *bo);
+
+static inline void
+cl_u8(struct vc4_cl *cl, uint8_t n)
+{
+        if (cl->next + 1 > cl->end)
+                vc4_grow_cl(cl);
+
+        *(uint8_t *)cl->next = n;
+        cl->next++;
+}
+
+static inline void
+cl_u16(struct vc4_cl *cl, uint32_t n)
+{
+        if (cl->next + 2 > cl->end)
+                vc4_grow_cl(cl);
+
+        *(uint16_t *)cl->next = n;
+        cl->next += 2;
+}
+
+static inline void
+cl_u32(struct vc4_cl *cl, uint32_t n)
+{
+        if (cl->next + 4 > cl->end)
+                vc4_grow_cl(cl);
+
+        *(uint32_t *)cl->next = n;
+        cl->next += 4;
+}
+
+static inline void
+cl_f(struct vc4_cl *cl, float f)
+{
+        cl_u32(cl, fui(f));
+}
+
+static inline void
+cl_start_reloc(struct vc4_cl *cl, uint32_t n)
+{
+        assert(n == 1 || n == 2);
+        assert(cl->reloc_count == 0);
+        cl->reloc_count = n;
+
+#ifndef USE_VC4_SIMULATOR
+        cl_u8(cl, GEM_HANDLES);
+        cl->reloc_next = cl->next - cl->base;
+        cl_u32(cl, 0); /* Space where hindex will be written. */
+        cl_u32(cl, 0); /* Space where hindex will be written. */
+#endif
+}
+
+static inline void
+cl_start_shader_reloc(struct vc4_cl *cl, uint32_t n)
+{
+        assert(cl->reloc_count == 0);
+        cl->reloc_count = n;
+        cl->reloc_next = cl->next - cl->base;
+
+#ifndef USE_VC4_SIMULATOR
+        for (int i = 0; i < n; i++)
+                cl_u32(cl, 0); /* Space where hindex will be written. */
+#endif
+}
+
+static inline void
+cl_reloc(struct vc4_context *vc4, struct vc4_cl *cl,
+         struct vc4_bo *bo, uint32_t offset)
+{
+#ifndef USE_VC4_SIMULATOR
+        *(uint32_t *)(cl->base + cl->reloc_next) = vc4_gem_hindex(vc4, bo);
+        cl->reloc_next += 4;
+#else
+        offset += simpenrose_hw_addr(bo->map);
+#endif
+
+        cl->reloc_count--;
+
+        cl_u32(cl, offset);
+}
+
+#endif /* VC4_CL_H */