Commit 517f188c authored by Weinan Li's avatar Weinan Li Committed by Chris Wilson

drm/i915: noop forcewake get/put when vgpu activated

For a virtualized GPU, the host maintains the forcewake state on the real
device. As we don't control forcewake ourselves, we can simply set
force_wake_get() and force_wake_put() to be no-ops. By setting the vfuncs,
we adjust both the manual control of forcewake and around the mmio
accessors (making our vgpu specific mmio routines redundant and to be
removed in the next patch).
Signed-off-by: default avatarWeinan Li <weinan.z.li@intel.com>
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1485408013-12780-1-git-send-email-weinan.z.li@intel.comSigned-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent 4fa6053e
...@@ -132,6 +132,13 @@ fw_domains_put(struct drm_i915_private *dev_priv, enum forcewake_domains fw_doma ...@@ -132,6 +132,13 @@ fw_domains_put(struct drm_i915_private *dev_priv, enum forcewake_domains fw_doma
} }
} }
static void
vgpu_fw_domains_nop(struct drm_i915_private *dev_priv,
enum forcewake_domains fw_domains)
{
/* Guest driver doesn't need to takes care forcewake. */
}
static void static void
fw_domains_posting_read(struct drm_i915_private *dev_priv) fw_domains_posting_read(struct drm_i915_private *dev_priv)
{ {
...@@ -1375,6 +1382,11 @@ static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv) ...@@ -1375,6 +1382,11 @@ static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv)
FORCEWAKE, FORCEWAKE_ACK); FORCEWAKE, FORCEWAKE_ACK);
} }
if (intel_vgpu_active(dev_priv)) {
dev_priv->uncore.funcs.force_wake_get = vgpu_fw_domains_nop;
dev_priv->uncore.funcs.force_wake_put = vgpu_fw_domains_nop;
}
/* All future platforms are expected to require complex power gating */ /* All future platforms are expected to require complex power gating */
WARN_ON(dev_priv->uncore.fw_domains == 0); WARN_ON(dev_priv->uncore.fw_domains == 0);
} }
......
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