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drm/i915: add runtime put/get calls at the basic places 

If I add code to enable runtime PM on my Haswell machine, start a
desktop environment, then enable runtime PM, these functions will
complain that they're trying to read/write registers while the
graphics card is suspended.

v2: - Simplify i915_gem_fault changes.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
[danvet: Drop the hunk in i915_hangcheck_elapsed, it's the wrong thing
to do.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2013-11-27 18:20:34 -02:00 committed by Daniel Vetter
parent cd2e9e908a
commit f65c916898
2 changed files with 27 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/gpu/drm/i915/i915_gem.c
View File

@ -1380,6 +1380,8 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
int ret = 0;
bool write = !!(vmf->flags & FAULT_FLAG_WRITE);
intel_runtime_pm_get(dev_priv);
/* We don't use vmf->pgoff since that has the fake offset */
page_offset = ((unsigned long)vmf->virtual_address - vma->vm_start) >>
PAGE_SHIFT;
@ -1427,8 +1429,10 @@ out:
/* If this -EIO is due to a gpu hang, give the reset code a
* chance to clean up the mess. Otherwise return the proper
* SIGBUS. */
if (i915_terminally_wedged(&dev_priv->gpu_error))
return VM_FAULT_SIGBUS;
if (i915_terminally_wedged(&dev_priv->gpu_error)) {
ret = VM_FAULT_SIGBUS;
break;
}
case -EAGAIN:
/*
* EAGAIN means the gpu is hung and we'll wait for the error
@ -1443,15 +1447,22 @@ out:
* EBUSY is ok: this just means that another thread
* already did the job.
*/
return VM_FAULT_NOPAGE;
ret = VM_FAULT_NOPAGE;
break;
case -ENOMEM:
return VM_FAULT_OOM;
ret = VM_FAULT_OOM;
break;
case -ENOSPC:
return VM_FAULT_SIGBUS;
ret = VM_FAULT_SIGBUS;
break;
default:
WARN_ONCE(ret, "unhandled error in i915_gem_fault: %i\n", ret);
return VM_FAULT_SIGBUS;
ret = VM_FAULT_SIGBUS;
break;
}
intel_runtime_pm_put(dev_priv);
return ret;
}
/**
@ -4169,6 +4180,8 @@ void i915_gem_free_object(struct drm_gem_object *gem_obj)
drm_i915_private_t *dev_priv = dev->dev_private;
struct i915_vma *vma, *next;
intel_runtime_pm_get(dev_priv);
trace_i915_gem_object_destroy(obj);
if (obj->phys_obj)
@ -4213,6 +4226,8 @@ void i915_gem_free_object(struct drm_gem_object *gem_obj)
kfree(obj->bit_17);
i915_gem_object_free(obj);
intel_runtime_pm_put(dev_priv);
}
struct i915_vma *i915_gem_obj_to_vma(struct drm_i915_gem_object *obj,

6
drivers/gpu/drm/i915/i915_gem_execbuffer.c
View File

@ -1108,6 +1108,8 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
}
}
intel_runtime_pm_get(dev_priv);
ret = i915_mutex_lock_interruptible(dev);
if (ret)
goto pre_mutex_err;
@ -1237,6 +1239,10 @@ err:
pre_mutex_err:
kfree(cliprects);
/* intel_gpu_busy should also get a ref, so it will free when the device
* is really idle. */
intel_runtime_pm_put(dev_priv);
return ret;
}