freedreno: gallium driver for adreno

Currently works on a220.  Others in the a2xx family look pretty similar
and should be pretty straightforward to support with the same driver.

The a3xx has a new shader ISA, and while many registers appear similar,
the register addresses have been completely shuffled around.  I am not
sure yet whether it is best to support with the same driver, but
different compiler, or whether it should be split into a different
driver.

v1: original
v2: build file updates from review comments, and remove GPL licensed
    header files from msm kernel
v3: smarter temp/pred register assignment, fix clear and depth/stencil
    format issues, resource_transfer fixes, scissor fixes

Signed-off-by: Rob Clark <robdclark@gmail.com>

1 files changed, 205 insertions, 0 deletions

diff --git a/src/gallium/drivers/freedreno/freedreno_context.c b/src/gallium/drivers/freedreno/freedreno_context.c
new file mode 100644
index 00000000000..cac10b70c9c
--- /dev/null
+++ b/src/gallium/drivers/freedreno/freedreno_context.c
@@ -0,0 +1,205 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
+ *
+ * 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.
+ *
+ * Authors:
+ *    Rob Clark <robclark@freedesktop.org>
+ */
+
+#include "freedreno_context.h"
+#include "freedreno_vbo.h"
+#include "freedreno_blend.h"
+#include "freedreno_rasterizer.h"
+#include "freedreno_zsa.h"
+#include "freedreno_state.h"
+#include "freedreno_resource.h"
+#include "freedreno_clear.h"
+#include "freedreno_program.h"
+#include "freedreno_texture.h"
+#include "freedreno_gmem.h"
+#include "freedreno_util.h"
+
+/* there are two cases where we currently need to wait for render complete:
+ * 1) pctx->flush() .. since at the moment we have no way for DDX to sync
+ *    the presentation blit with the 3d core
+ * 2) wrap-around for ringbuffer.. possibly we can do something more
+ *    Intelligent here.  Right now we need to ensure there is enough room
+ *    at the end of the drawcmds in the cmdstream buffer for all the per-
+ *    tile cmds.  We do this the lamest way possible, by making the ringbuffer
+ *    big, and flushing and resetting back to the beginning if we get too
+ *    close to the end.
+ */
+static void
+fd_context_wait(struct pipe_context *pctx)
+{
+	struct fd_context *ctx = fd_context(pctx);
+	uint32_t ts = fd_ringbuffer_timestamp(ctx->ring);
+
+	DBG("wait: %u", ts);
+
+	fd_pipe_wait(ctx->screen->pipe, ts);
+	fd_ringbuffer_reset(ctx->ring);
+	fd_ringmarker_mark(ctx->draw_start);
+}
+
+/* emit accumulated render cmds, needed for example if render target has
+ * changed, or for flush()
+ */
+void
+fd_context_render(struct pipe_context *pctx)
+{
+	struct fd_context *ctx = fd_context(pctx);
+	struct pipe_framebuffer_state *fb = &ctx->framebuffer.base;
+
+	DBG("needs_flush: %d", ctx->needs_flush);
+
+	if (!ctx->needs_flush)
+		return;
+
+	fd_gmem_render_tiles(pctx);
+
+	DBG("%p/%p/%p", ctx->ring->start, ctx->ring->cur, ctx->ring->end);
+
+	/* if size in dwords is more than half the buffer size, then wait and
+	 * wrap around:
+	 */
+	if ((ctx->ring->cur - ctx->ring->start) > ctx->ring->size/8)
+		fd_context_wait(pctx);
+
+	ctx->needs_flush = false;
+	ctx->cleared = ctx->restore = ctx->resolve = 0;
+
+	fd_resource(fb->cbufs[0]->texture)->dirty = false;
+	if (fb->zsbuf)
+		fd_resource(fb->zsbuf->texture)->dirty = false;
+}
+
+static void
+fd_context_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
+		enum pipe_flush_flags flags)
+{
+	DBG("fence=%p", fence);
+
+#if 0
+	if (fence) {
+		fd_fence_ref(ctx->screen->fence.current,
+				(struct fd_fence **)fence);
+	}
+#endif
+
+	fd_context_render(pctx);
+	fd_context_wait(pctx);
+}
+
+static void
+fd_context_destroy(struct pipe_context *pctx)
+{
+	struct fd_context *ctx = fd_context(pctx);
+
+	DBG("");
+
+	if (ctx->blitter)
+		util_blitter_destroy(ctx->blitter);
+
+	fd_ringmarker_del(ctx->draw_start);
+	fd_ringmarker_del(ctx->draw_end);
+	fd_ringbuffer_del(ctx->ring);
+
+	fd_prog_fini(pctx);
+
+	FREE(ctx);
+}
+
+static struct pipe_resource *
+create_solid_vertexbuf(struct pipe_context *pctx)
+{
+	static const float init_shader_const[] = {
+			/* for clear/gmem2mem: */
+			-1.000000, +1.000000, +1.000000, +1.100000,
+			+1.000000, +1.000000, -1.000000, -1.100000,
+			+1.000000, +1.100000, -1.100000, +1.000000,
+			/* for mem2gmem: (vertices) */
+			-1.000000, +1.000000, +1.000000, +1.000000,
+			+1.000000, +1.000000, -1.000000, -1.000000,
+			+1.000000, +1.000000, -1.000000, +1.000000,
+			/* for mem2gmem: (tex coords) */
+			+0.000000, +0.000000, +1.000000, +0.000000,
+			+0.000000, +1.000000, +1.000000, +1.000000,
+	};
+	struct pipe_resource *prsc = pipe_buffer_create(pctx->screen,
+			PIPE_BIND_CUSTOM, PIPE_USAGE_IMMUTABLE, sizeof(init_shader_const));
+	pipe_buffer_write(pctx, prsc, 0,
+			sizeof(init_shader_const), init_shader_const);
+	return prsc;
+}
+
+struct pipe_context *
+fd_context_create(struct pipe_screen *pscreen, void *priv)
+{
+	struct fd_screen *screen = fd_screen(pscreen);
+	struct fd_context *ctx = CALLOC_STRUCT(fd_context);
+	struct pipe_context *pctx;
+
+	if (!ctx)
+		return NULL;
+
+	DBG("");
+
+	ctx->screen = screen;
+
+	ctx->ring = fd_ringbuffer_new(screen->pipe, 0x100000);
+	ctx->draw_start = fd_ringmarker_new(ctx->ring);
+	ctx->draw_end = fd_ringmarker_new(ctx->ring);
+
+	pctx = &ctx->base;
+	pctx->screen = pscreen;
+	pctx->priv = priv;
+	pctx->flush = fd_context_flush;
+	pctx->destroy = fd_context_destroy;
+
+	util_slab_create(&ctx->transfer_pool, sizeof(struct pipe_transfer),
+			16, UTIL_SLAB_SINGLETHREADED);
+
+	fd_vbo_init(pctx);
+	fd_blend_init(pctx);
+	fd_rasterizer_init(pctx);
+	fd_zsa_init(pctx);
+	fd_state_init(pctx);
+	fd_resource_context_init(pctx);
+	fd_clear_init(pctx);
+	fd_prog_init(pctx);
+	fd_texture_init(pctx);
+
+	ctx->blitter = util_blitter_create(pctx);
+	if (!ctx->blitter) {
+		fd_context_destroy(pctx);
+		return NULL;
+	}
+
+	/* construct vertex state used for solid ops (clear, and gmem<->mem) */
+	ctx->solid_vertexbuf = create_solid_vertexbuf(pctx);
+
+	fd_state_emit_setup(pctx);
+
+	return pctx;
+}