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author | Ben Widawsky <ben@bwidawsk.net> | 2014-06-30 16:53:42 (GMT) |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-07-07 21:16:55 (GMT) |
commit | e04934cf256154fd6cc88a0767e45bd1b4920419 (patch) | |
tree | 86414b3146bac3ea3537a1a6998977c1684ccade /drivers/gpu/drm/i915/i915_debugfs.c | |
parent | 0ca36d78391dc97b7d3e3d26e4518e30f3e88c16 (diff) | |
download | linux-e04934cf256154fd6cc88a0767e45bd1b4920419.tar.xz |
drm/i915: semaphore debugfs
Simple debugfs file to display the current state of semaphores. This is
useful if you want to see the state without hanging the GPU.
NOTE: This patch is optional to the series.
NOTE2: Like the GPU error state collection, the reads are currently
incoherent.
v2 (Rodrigo): * Iterate only on active rings.
* s/ring_buffer/engine_cs.
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index bfd0d41..c1b88a8 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2395,6 +2395,76 @@ static int i915_display_info(struct seq_file *m, void *unused) return 0; } +static int i915_semaphore_status(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; + int num_rings = hweight32(INTEL_INFO(dev)->ring_mask); + int i, j, ret; + + if (!i915_semaphore_is_enabled(dev)) { + seq_puts(m, "Semaphores are disabled\n"); + return 0; + } + + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; + + if (IS_BROADWELL(dev)) { + struct page *page; + uint64_t *seqno; + + page = i915_gem_object_get_page(dev_priv->semaphore_obj, 0); + + seqno = (uint64_t *)kmap_atomic(page); + for_each_ring(ring, dev_priv, i) { + uint64_t offset; + + seq_printf(m, "%s\n", ring->name); + + seq_puts(m, " Last signal:"); + for (j = 0; j < num_rings; j++) { + offset = i * I915_NUM_RINGS + j; + seq_printf(m, "0x%08llx (0x%02llx) ", + seqno[offset], offset * 8); + } + seq_putc(m, '\n'); + + seq_puts(m, " Last wait: "); + for (j = 0; j < num_rings; j++) { + offset = i + (j * I915_NUM_RINGS); + seq_printf(m, "0x%08llx (0x%02llx) ", + seqno[offset], offset * 8); + } + seq_putc(m, '\n'); + + } + kunmap_atomic(seqno); + } else { + seq_puts(m, " Last signal:"); + for_each_ring(ring, dev_priv, i) + for (j = 0; j < num_rings; j++) + seq_printf(m, "0x%08x\n", + I915_READ(ring->semaphore.mbox.signal[j])); + seq_putc(m, '\n'); + } + + seq_puts(m, "\nSync seqno:\n"); + for_each_ring(ring, dev_priv, i) { + for (j = 0; j < num_rings; j++) { + seq_printf(m, " 0x%08x ", ring->semaphore.sync_seqno[j]); + } + seq_putc(m, '\n'); + } + seq_putc(m, '\n'); + + mutex_unlock(&dev->struct_mutex); + return 0; +} + struct pipe_crc_info { const char *name; struct drm_device *dev; @@ -3904,6 +3974,7 @@ static const struct drm_info_list i915_debugfs_list[] = { {"i915_pc8_status", i915_pc8_status, 0}, {"i915_power_domain_info", i915_power_domain_info, 0}, {"i915_display_info", i915_display_info, 0}, + {"i915_semaphore_status", i915_semaphore_status, 0}, }; #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list) |