int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_gem_context_destroy *args = data;
struct drm_i915_file_private *file_priv = file->driver_priv;
struct i915_hw_context *ctx;
int ret;
if (!(dev->driver->driver_features & DRIVER_GEM))
return -ENODEV;
ret = i915_mutex_lock_interruptible(dev);
if (ret)
return ret;
ctx = i915_gem_context_get(file_priv, args->ctx_id);
if (!ctx) {
mutex_unlock(&dev->struct_mutex);
return -ENOENT;
}
do_destroy(ctx);
mutex_unlock(&dev->struct_mutex);
DRM_DEBUG_DRIVER("HW context %d destroyed\n", args->ctx_id);
return 0;
}
/**
* i915_switch_context() - perform a GPU context switch.
* @ring: ring for which we'll execute the context switch
* @file_priv: file_priv associated with the context, may be NULL
* @id: context id number
* @seqno: sequence number by which the new context will be switched to
* @flags:
*
* The context life cycle is simple. The context refcount is incremented and
* decremented by 1 and create and destroy. If the context is in use by the GPU,
* it will have a refoucnt > 1. This allows us to destroy the context abstract
* object while letting the normal object tracking destroy the backing BO.
*/
int i915_switch_context(struct intel_ring_buffer *ring,
struct drm_file *file,
int to_id)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
struct i915_hw_context *to;
if (dev_priv->hw_contexts_disabled)
return 0;
if (ring != &dev_priv->rings[RCS])
return 0;
if (to_id == DEFAULT_CONTEXT_ID) {
to = ring->default_context;
} else {
if (file == NULL)
return -EINVAL;
to = i915_gem_context_get(file->driver_priv, to_id);
if (to == NULL)
return -ENOENT;
}
return do_switch(to);
}
/**
* i915_switch_context() - perform a GPU context switch.
* @ring: ring for which we'll execute the context switch
* @file_priv: file_priv associated with the context, may be NULL
* @id: context id number
* @seqno: sequence number by which the new context will be switched to
* @flags:
*
* The context life cycle is simple. The context refcount is incremented and
* decremented by 1 and create and destroy. If the context is in use by the GPU,
* it will have a refoucnt > 1. This allows us to destroy the context abstract
* object while letting the normal object tracking destroy the backing BO.
*/
int i915_switch_context(struct intel_ring_buffer *ring,
struct drm_file *file,
int to_id)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
struct drm_i915_file_private *file_priv = NULL;
struct i915_hw_context *to;
struct drm_i915_gem_object *from_obj = ring->last_context_obj;
if (dev_priv->hw_contexts_disabled)
return 0;
if (ring != &dev_priv->ring[RCS])
return 0;
if (file)
file_priv = file->driver_priv;
if (to_id == DEFAULT_CONTEXT_ID) {
to = ring->default_context;
} else {
to = i915_gem_context_get(file_priv, to_id);
if (to == NULL)
return -ENOENT;
}
if (from_obj == to->obj)
return 0;
return do_switch(from_obj, to, i915_gem_next_request_seqno(to->ring));
}
struct i915_ctx_hang_stats *
i915_gem_context_get_hang_stats(struct intel_ring_buffer *ring,
struct drm_file *file,
u32 id)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
struct drm_i915_file_private *file_priv = file->driver_priv;
struct i915_hw_context *to;
if (dev_priv->hw_contexts_disabled)
return ERR_PTR(-ENOENT);
if (ring->id != RCS)
return ERR_PTR(-EINVAL);
if (file == NULL)
return ERR_PTR(-EINVAL);
if (id == DEFAULT_CONTEXT_ID)
return &file_priv->hang_stats;
to = i915_gem_context_get(file->driver_priv, id);
if (to == NULL)
return ERR_PTR(-ENOENT);
return &to->hang_stats;
}
/**
* i915_switch_context() - perform a GPU context switch.
* @ring: ring for which we'll execute the context switch
* @file_priv: file_priv associated with the context, may be NULL
* @id: context id number
*
* The context life cycle is simple. The context refcount is incremented and
* decremented by 1 and create and destroy. If the context is in use by the GPU,
* it will have a refoucnt > 1. This allows us to destroy the context abstract
* object while letting the normal object tracking destroy the backing BO.
*/
int i915_switch_context(struct intel_ring_buffer *ring,
struct drm_file *file,
int to_id)
{
struct drm_i915_private *dev_priv = ring->dev->dev_private;
struct i915_hw_context *to;
if (!HAS_HW_CONTEXTS(ring->dev))
return 0;
WARN_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex));
if (ring != &dev_priv->ring[RCS])
return 0;
if (to_id == DEFAULT_CONTEXT_ID) {
to = ring->default_context;
} else {
if (file == NULL)
return -EINVAL;
to = i915_gem_context_get(file->driver_priv, to_id);
if (to == NULL)
return -ENOENT;
}
return do_switch(to);
}
int __intel_context_do_pin(struct intel_context *ce)
{
int err;
if (mutex_lock_interruptible(&ce->pin_mutex))
return -EINTR;
if (likely(!atomic_read(&ce->pin_count))) {
intel_wakeref_t wakeref;
err = 0;
with_intel_runtime_pm(ce->engine->i915, wakeref)
err = ce->ops->pin(ce);
if (err)
goto err;
i915_gem_context_get(ce->gem_context); /* for ctx->ppgtt */
intel_context_get(ce);
smp_mb__before_atomic(); /* flush pin before it is visible */
}
atomic_inc(&ce->pin_count);
GEM_BUG_ON(!intel_context_is_pinned(ce)); /* no overflow! */
mutex_unlock(&ce->pin_mutex);
return 0;
err:
mutex_unlock(&ce->pin_mutex);
return err;
}
struct i915_ctx_hang_stats *
i915_gem_context_get_hang_stats(struct drm_device *dev,
struct drm_file *file,
u32 id)
{
struct drm_i915_file_private *file_priv = file->driver_priv;
struct i915_hw_context *ctx;
if (id == DEFAULT_CONTEXT_ID)
return &file_priv->hang_stats;
if (!HAS_HW_CONTEXTS(dev))
return ERR_PTR(-ENOENT);
ctx = i915_gem_context_get(file->driver_priv, id);
if (ctx == NULL)
return ERR_PTR(-ENOENT);
return &ctx->hang_stats;
}
int i915_get_reset_stats_ioctl(struct drm_device *dev,
void *data, struct drm_file *file)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_reset_stats *args = data;
struct i915_ctx_hang_stats *hs;
struct intel_context *ctx;
int ret;
if (args->flags || args->pad)
return -EINVAL;
if (args->ctx_id == DEFAULT_CONTEXT_HANDLE && !capable(CAP_SYS_ADMIN))
return -EPERM;
ret = mutex_lock_interruptible(&dev->struct_mutex);
if (ret)
return ret;
ctx = i915_gem_context_get(file->driver_priv, args->ctx_id);
if (IS_ERR(ctx)) {
mutex_unlock(&dev->struct_mutex);
return PTR_ERR(ctx);
}
hs = &ctx->hang_stats;
if (capable(CAP_SYS_ADMIN))
args->reset_count = i915_reset_count(&dev_priv->gpu_error);
else
args->reset_count = 0;
args->batch_active = hs->batch_active;
args->batch_pending = hs->batch_pending;
mutex_unlock(&dev->struct_mutex);
return 0;
}
