--- /dev/null
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * 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 <sys/errno.h>
+
+#include "main/condrender.h"
+#include "main/glheader.h"
+#include "main/mtypes.h"
+#include "main/state.h"
+#include "brw_context.h"
+#include "brw_draw.h"
+#include "brw_state.h"
+#include "intel_batchbuffer.h"
+
+
+static void
+brw_emit_gpgpu_walker(struct brw_context *brw, const GLuint *num_groups)
+{
+ _mesa_problem(&brw->ctx, "TODO: implement brw_emit_gpgpu_walker");
+}
+
+
+static void
+brw_dispatch_compute(struct gl_context *ctx, const GLuint *num_groups)
+{
+ struct brw_context *brw = brw_context(ctx);
+ int estimated_buffer_space_needed;
+ bool fail_next = false;
+
+ if (!_mesa_check_conditional_render(ctx))
+ return;
+
+ if (ctx->NewState)
+ _mesa_update_state(ctx);
+
+ brw_validate_textures(brw);
+
+ const int sampler_state_size = 16; /* 16 bytes */
+ estimated_buffer_space_needed = 512; /* batchbuffer commands */
+ estimated_buffer_space_needed += (BRW_MAX_TEX_UNIT *
+ (sampler_state_size +
+ sizeof(struct gen5_sampler_default_color)));
+ estimated_buffer_space_needed += 1024; /* push constants */
+ estimated_buffer_space_needed += 512; /* misc. pad */
+
+ /* Flush the batch if it's approaching full, so that we don't wrap while
+ * we've got validated state that needs to be in the same batch as the
+ * primitives.
+ */
+ intel_batchbuffer_require_space(brw, estimated_buffer_space_needed,
+ RENDER_RING);
+ intel_batchbuffer_save_state(brw);
+
+ retry:
+ brw->no_batch_wrap = true;
+ brw_upload_compute_state(brw);
+
+ brw_emit_gpgpu_walker(brw, num_groups);
+
+ brw->no_batch_wrap = false;
+
+ if (dri_bufmgr_check_aperture_space(&brw->batch.bo, 1)) {
+ if (!fail_next) {
+ intel_batchbuffer_reset_to_saved(brw);
+ intel_batchbuffer_flush(brw);
+ fail_next = true;
+ goto retry;
+ } else {
+ if (intel_batchbuffer_flush(brw) == -ENOSPC) {
+ static bool warned = false;
+
+ if (!warned) {
+ fprintf(stderr, "i965: Single compute shader dispatch "
+ "exceeded available aperture space\n");
+ warned = true;
+ }
+ }
+ }
+ }
+
+ /* Now that we know we haven't run out of aperture space, we can safely
+ * reset the dirty bits.
+ */
+ brw_compute_state_finished(brw);
+
+ if (brw->always_flush_batch)
+ intel_batchbuffer_flush(brw);
+
+ brw_state_cache_check_size(brw);
+
+ /* Note: since compute shaders can't write to framebuffers, there's no need
+ * to call brw_postdraw_set_buffers_need_resolve().
+ */
+}
+
+
+void
+brw_init_compute_functions(struct dd_function_table *functions)
+{
+ functions->DispatchCompute = brw_dispatch_compute;
+}
projects / mesa.git / commitdiff