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>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 92149bc..df83fec 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1380,6 +1380,8 @@
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 @@
/* 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 @@
* 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 @@
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 @@
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,