[Intel-gfx] [PATCH 039/190] drm/i915: Remove stop-rings debugfs interface
Chris Wilson
chris at chris-wilson.co.uk
Mon Jan 11 01:16:50 PST 2016
Now that we have (near) universal GPU recovery code, we can inject a
real hang from userspace and not need any fakery. Not only does this
mean that the testing is far more realistic, but we can simplify the
kernel in the process.
v2: Replace the i915_stop_rings with a dummy implementation as igt
encodified its existence until we can release an update.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_debugfs.c | 19 +------------------
drivers/gpu/drm/i915/i915_drv.c | 17 ++---------------
drivers/gpu/drm/i915/i915_drv.h | 19 -------------------
drivers/gpu/drm/i915/i915_gem.c | 13 +++----------
drivers/gpu/drm/i915/intel_lrc.c | 5 -----
drivers/gpu/drm/i915/intel_ringbuffer.c | 8 --------
drivers/gpu/drm/i915/intel_ringbuffer.h | 1 -
7 files changed, 6 insertions(+), 76 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 567f8db4c70a..6172649b7e56 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4752,30 +4752,13 @@ DEFINE_SIMPLE_ATTRIBUTE(i915_wedged_fops,
static int
i915_ring_stop_get(void *data, u64 *val)
{
- struct drm_device *dev = data;
- struct drm_i915_private *dev_priv = dev->dev_private;
-
- *val = dev_priv->gpu_error.stop_rings;
-
+ *val = 0;
return 0;
}
static int
i915_ring_stop_set(void *data, u64 val)
{
- struct drm_device *dev = data;
- struct drm_i915_private *dev_priv = dev->dev_private;
- int ret;
-
- DRM_DEBUG_DRIVER("Stopping rings 0x%08llx\n", val);
-
- ret = mutex_lock_interruptible(&dev->struct_mutex);
- if (ret)
- return ret;
-
- dev_priv->gpu_error.stop_rings = val;
- mutex_unlock(&dev->struct_mutex);
-
return 0;
}
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 442e1217e442..e9f85fd0542f 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -891,24 +891,11 @@ int i915_reset(struct drm_device *dev)
goto error;
}
+ pr_notice("drm/i915: Resetting chip after gpu hang\n");
+
i915_gem_reset(dev);
ret = intel_gpu_reset(dev);
-
- /* Also reset the gpu hangman. */
- if (error->stop_rings != 0) {
- DRM_INFO("Simulated gpu hang, resetting stop_rings\n");
- error->stop_rings = 0;
- if (ret == -ENODEV) {
- DRM_INFO("Reset not implemented, but ignoring "
- "error for simulated gpu hangs\n");
- ret = 0;
- }
- }
-
- if (i915_stop_ring_allow_warn(dev_priv))
- pr_notice("drm/i915: Resetting chip after gpu hang\n");
-
if (ret) {
if (ret != -ENODEV)
DRM_ERROR("Failed to reset chip: %i\n", ret);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 9ec6f3e9e74d..c3b795f1566b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1371,13 +1371,6 @@ struct i915_gpu_error {
*/
wait_queue_head_t reset_queue;
- /* Userspace knobs for gpu hang simulation;
- * combines both a ring mask, and extra flags
- */
- u32 stop_rings;
-#define I915_STOP_RING_ALLOW_BAN (1 << 31)
-#define I915_STOP_RING_ALLOW_WARN (1 << 30)
-
/* For missed irq/seqno simulation. */
unsigned long test_irq_rings;
};
@@ -3030,18 +3023,6 @@ static inline u32 i915_reset_count(struct i915_gpu_error *error)
return ((i915_reset_counter(error) & ~I915_WEDGED) + 1) / 2;
}
-static inline bool i915_stop_ring_allow_ban(struct drm_i915_private *dev_priv)
-{
- return dev_priv->gpu_error.stop_rings == 0 ||
- dev_priv->gpu_error.stop_rings & I915_STOP_RING_ALLOW_BAN;
-}
-
-static inline bool i915_stop_ring_allow_warn(struct drm_i915_private *dev_priv)
-{
- return dev_priv->gpu_error.stop_rings == 0 ||
- dev_priv->gpu_error.stop_rings & I915_STOP_RING_ALLOW_WARN;
-}
-
void i915_gem_reset(struct drm_device *dev);
bool i915_gem_clflush_object(struct drm_i915_gem_object *obj, bool force);
int __must_check i915_gem_init(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 3948e85eaa48..ea9344503bf6 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2633,21 +2633,14 @@ static bool i915_context_is_banned(struct drm_i915_private *dev_priv,
{
unsigned long elapsed;
- elapsed = get_seconds() - ctx->hang_stats.guilty_ts;
-
if (ctx->hang_stats.banned)
return true;
+ elapsed = get_seconds() - ctx->hang_stats.guilty_ts;
if (ctx->hang_stats.ban_period_seconds &&
elapsed <= ctx->hang_stats.ban_period_seconds) {
- if (!i915_gem_context_is_default(ctx)) {
- DRM_DEBUG("context hanging too fast, banning!\n");
- return true;
- } else if (i915_stop_ring_allow_ban(dev_priv)) {
- if (i915_stop_ring_allow_warn(dev_priv))
- DRM_ERROR("gpu hanging too fast, banning!\n");
- return true;
- }
+ DRM_DEBUG("context hanging too fast, banning!\n");
+ return true;
}
return false;
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index b1ede2e9b372..b634e7d7a92b 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -756,16 +756,11 @@ static int logical_ring_wait_for_space(struct drm_i915_gem_request *req,
static void
intel_logical_ring_advance_and_submit(struct drm_i915_gem_request *request)
{
- struct intel_engine_cs *ring = request->ring;
struct drm_i915_private *dev_priv = request->i915;
intel_logical_ring_advance(request->ringbuf);
-
request->tail = request->ringbuf->tail;
- if (intel_ring_stopped(ring))
- return;
-
if (dev_priv->guc.execbuf_client)
i915_guc_submit(dev_priv->guc.execbuf_client, request);
else
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 5625f56a2db1..d9bb6458fa60 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -59,18 +59,10 @@ int intel_ring_space(struct intel_ringbuffer *ringbuf)
return ringbuf->space;
}
-bool intel_ring_stopped(struct intel_engine_cs *ring)
-{
- struct drm_i915_private *dev_priv = ring->dev->dev_private;
- return dev_priv->gpu_error.stop_rings & intel_ring_flag(ring);
-}
-
static void __intel_ring_advance(struct intel_engine_cs *ring)
{
struct intel_ringbuffer *ringbuf = ring->buffer;
ringbuf->tail &= ringbuf->size - 1;
- if (intel_ring_stopped(ring))
- return;
ring->write_tail(ring, ringbuf->tail);
}
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 73da75fa47c1..eecf9c7ae2b8 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -487,7 +487,6 @@ static inline void intel_ring_advance(struct intel_engine_cs *ring)
int __intel_ring_space(int head, int tail, int size);
void intel_ring_update_space(struct intel_ringbuffer *ringbuf);
int intel_ring_space(struct intel_ringbuffer *ringbuf);
-bool intel_ring_stopped(struct intel_engine_cs *ring);
int __must_check intel_ring_idle(struct intel_engine_cs *ring);
void intel_ring_init_seqno(struct intel_engine_cs *ring, u32 seqno);
--
2.7.0.rc3
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