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Commit c0ab1ae9 authored by Ben Widawsky's avatar Ben Widawsky Committed by Daniel Vetter
Browse files

drm/i915/bdw: Print context state in debugfs 



This has turned out to be really handy in debug so far.

Update:
Since writing this patch, I've gotten similar code upstream for error
state. I've used it quite a bit in debugfs however, and I'd like to keep
it here at least until preemption is working.

Signed-off-by: default avatarBen Widawsky <ben@bwidawsk.net>

This patch was accidentally dropped in the first Execlists version, and
it has been very useful indeed. Put it back again, but as a standalone
debugfs file.

Signed-off-by: default avatarOscar Mateo <oscar.mateo@intel.com>

v2: Take the device struct_mutex rather than mode_config mutex for
atomic state capture.

Signed-off-by: default avatarThomas Daniel <thomas.daniel@intel.com>
Reviewed-by: default avatarDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent c9fe99bd

drivers/gpu/drm/i915/i915_debugfs.c

+52 −0
Original line number Diff line number Diff line
@@ -1750,6 +1750,57 @@ static int i915_context_status(struct seq_file *m, void *unused) 
	return 0;

}



static int i915_dump_lrc(struct seq_file *m, void *unused)

{

	struct drm_info_node *node = (struct drm_info_node *) m->private;

	struct drm_device *dev = node->minor->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_engine_cs *ring;

	struct intel_context *ctx;

	int ret, i;



	if (!i915.enable_execlists) {

		seq_printf(m, "Logical Ring Contexts are disabled\n");

		return 0;

	}



	ret = mutex_lock_interruptible(&dev->struct_mutex);

	if (ret)

		return ret;



	list_for_each_entry(ctx, &dev_priv->context_list, link) {

		for_each_ring(ring, dev_priv, i) {

			struct drm_i915_gem_object *ctx_obj = ctx->engine[i].state;



			if (ring->default_context == ctx)

				continue;



			if (ctx_obj) {

				struct page *page = i915_gem_object_get_page(ctx_obj, 1);

				uint32_t *reg_state = kmap_atomic(page);

				int j;



				seq_printf(m, "CONTEXT: %s %u\n", ring->name,

						intel_execlists_ctx_id(ctx_obj));



				for (j = 0; j < 0x600 / sizeof(u32) / 4; j += 4) {

					seq_printf(m, "\t[0x%08lx] 0x%08x 0x%08x 0x%08x 0x%08x\n",

					i915_gem_obj_ggtt_offset(ctx_obj) + 4096 + (j * 4),

					reg_state[j], reg_state[j + 1],

					reg_state[j + 2], reg_state[j + 3]);

				}

				kunmap_atomic(reg_state);



				seq_putc(m, '\n');

			}

		}

	}



	mutex_unlock(&dev->struct_mutex);



	return 0;

}



static int i915_execlists(struct seq_file *m, void *data)

{

	struct drm_info_node *node = (struct drm_info_node *)m->private;
@@ -4083,6 +4134,7 @@ static const struct drm_info_list i915_debugfs_list[] = { 
	{"i915_opregion", i915_opregion, 0},

	{"i915_gem_framebuffer", i915_gem_framebuffer_info, 0},

	{"i915_context_status", i915_context_status, 0},

	{"i915_dump_lrc", i915_dump_lrc, 0},

	{"i915_execlists", i915_execlists, 0},

	{"i915_gen6_forcewake_count", i915_gen6_forcewake_count_info, 0},

	{"i915_swizzle_info", i915_swizzle_info, 0},