freedreno: add robustness support

Signed-off-by: Rob Clark <robdclark@chromium.org>

docs/features.txt

@@ -274,7 +274,7 @@ GLES3.2, GLSL ES 3.2 -- all DONE: i965/gen9+, radeonsi, virgl
   GL_EXT_color_buffer_float                             DONE (all drivers)
   GL_KHR_blend_equation_advanced                        DONE (i965, nvc0)
   GL_KHR_debug                                          DONE (all drivers)
-  GL_KHR_robustness                                     DONE (i965, nvc0)
+  GL_KHR_robustness                                     DONE (freedreno, i965, nvc0)
   GL_KHR_texture_compression_astc_ldr                   DONE (freedreno, i965/gen9+)
   GL_OES_copy_image                                     DONE (all drivers)
   GL_OES_draw_buffers_indexed                           DONE (all drivers that support GL_ARB_draw_buffers_blend)

src/gallium/drivers/freedreno/freedreno_context.c

@@ -208,6 +208,39 @@ fd_set_debug_callback(struct pipe_context *pctx,
 		memset(&ctx->debug, 0, sizeof(ctx->debug));
 }
 
+static uint32_t
+fd_get_reset_count(struct fd_context *ctx, bool per_context)
+{
+	uint64_t val;
+	enum fd_param_id param =
+		per_context ? FD_CTX_FAULTS : FD_GLOBAL_FAULTS;
+	int ret = fd_pipe_get_param(ctx->pipe, param, &val);
+	debug_assert(!ret);
+	return val;
+}
+
+static enum pipe_reset_status
+fd_get_device_reset_status(struct pipe_context *pctx)
+{
+	struct fd_context *ctx = fd_context(pctx);
+	int context_faults = fd_get_reset_count(ctx, true);
+	int global_faults  = fd_get_reset_count(ctx, false);
+	enum pipe_reset_status status;
+
+	if (context_faults != ctx->context_reset_count) {
+		status = PIPE_GUILTY_CONTEXT_RESET;
+	} else if (global_faults != ctx->global_reset_count) {
+		status = PIPE_INNOCENT_CONTEXT_RESET;
+	} else {
+		status = PIPE_NO_RESET;
+	}
+
+	ctx->context_reset_count = context_faults;
+	ctx->global_reset_count = global_faults;
+
+	return status;
+}
+
 /* TODO we could combine a few of these small buffers (solid_vbuf,
  * blit_texcoord_vbuf, and vsc_size_mem, into a single buffer and
  * save a tiny bit of memory
@@ -304,6 +337,11 @@ fd_context_init(struct fd_context *ctx, struct pipe_screen *pscreen,
 	ctx->screen = screen;
 	ctx->pipe = fd_pipe_new2(screen->dev, FD_PIPE_3D, prio);
 
+	if (fd_device_version(screen->dev) >= FD_VERSION_ROBUSTNESS) {
+		ctx->context_reset_count = fd_get_reset_count(ctx, true);
+		ctx->global_reset_count = fd_get_reset_count(ctx, false);
+	}
+
 	ctx->primtypes = primtypes;
 	ctx->primtype_mask = 0;
 	for (i = 0; i < PIPE_PRIM_MAX; i++)
@@ -321,6 +359,7 @@ fd_context_init(struct fd_context *ctx, struct pipe_screen *pscreen,
 	pctx->flush = fd_context_flush;
 	pctx->emit_string_marker = fd_emit_string_marker;
 	pctx->set_debug_callback = fd_set_debug_callback;
+	pctx->get_device_reset_status = fd_get_device_reset_status;
 	pctx->create_fence_fd = fd_create_fence_fd;
 	pctx->fence_server_sync = fd_fence_server_sync;
 	pctx->texture_barrier = fd_texture_barrier;

src/gallium/drivers/freedreno/freedreno_context.h

@@ -228,6 +228,14 @@ struct fd_context {
 	 */
 	struct pipe_fence_handle *last_fence;
 
+	/* track last known reset status globally and per-context to
+	 * determine if more resets occurred since then.  If global reset
+	 * count increases, it means some other context crashed.  If
+	 * per-context reset count increases, it means we crashed the
+	 * gpu.
+	 */
+	uint32_t context_reset_count, global_reset_count;
+
 	/* Are we in process of shadowing a resource? Used to detect recursion
 	 * in transfer_map, and skip unneeded synchronization.
 	 */

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -200,6 +200,10 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_PACKED_UNIFORMS:
 		return !is_a2xx(screen);
 
+	case PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR:
+	case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
+		return screen->has_robustness;
+
 	case PIPE_CAP_VERTEXID_NOBASE:
 		return is_a3xx(screen) || is_a4xx(screen);
 
@@ -819,6 +823,11 @@ fd_screen_create(struct fd_device *dev, struct renderonly *ro)
 		screen->priority_mask = (1 << val) - 1;
 	}
 
+	if ((fd_device_version(dev) >= FD_VERSION_ROBUSTNESS) &&
+			(fd_pipe_get_param(screen->pipe, FD_PP_PGTABLE, &val) == 0)) {
+		screen->has_robustness = val;
+	}
+
 	struct sysinfo si;
 	sysinfo(&si);
 	screen->ram_size = si.totalram;

src/gallium/drivers/freedreno/freedreno_screen.h

@@ -70,6 +70,7 @@ struct fd_screen {
 	uint32_t num_vsc_pipes;
 	uint32_t priority_mask;
 	bool has_timestamp;
+	bool has_robustness;
 
 	unsigned num_perfcntr_groups;
 	const struct fd_perfcntr_group *perfcntr_groups;