From c0ab1ae9028f14bcb7bfb655bd2120c60681c479 Mon Sep 17 00:00:00 2001 From: Ben Widawsky Date: Thu, 7 Aug 2014 13:24:26 +0100 Subject: [PATCH] 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: Ben Widawsky 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: Oscar Mateo v2: Take the device struct_mutex rather than mode_config mutex for atomic state capture. Signed-off-by: Thomas Daniel Reviewed-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_debugfs.c | 52 +++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 4f279cfe67b..6c82bdaa082 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -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}, -- 2.46.0