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drm/i915/guc: Use wait_for_register_fw() while waiting for MMIO response

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Waiting for the response status in scratch register can be done
using our generic function. Let's use it.

v2: rebased

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Suggested-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170407160145.181328-2-michal.wajdeczko@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Michal Wajdeczko 2017-04-07 16:01:45 +00:00 committed by Chris Wilson
parent 1d1a9774e4
commit bea4e4a4f8
1 changed files with 7 additions and 19 deletions
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26
drivers/gpu/drm/i915/intel_uc.c
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@ -359,19 +359,6 @@ void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
i915_ggtt_disable_guc(dev_priv);
}
/*
* Read GuC command/status register (SOFT_SCRATCH_0)
* Return true if it contains a response rather than a command
*/
static bool guc_recv(struct intel_guc *guc, u32 *status)
{
struct drm_i915_private *dev_priv = guc_to_i915(guc);
u32 val = I915_READ(SOFT_SCRATCH(0));
*status = val;
return INTEL_GUC_RECV_IS_RESPONSE(val);
}
/*
* This function implements the MMIO based host to GuC interface.
*/
@ -399,13 +386,14 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len)
I915_WRITE(GUC_SEND_INTERRUPT, GUC_SEND_TRIGGER);
/*
* Fast commands should complete in less than 10us, so sample quickly
* up to that length of time, then switch to a slower sleep-wait loop.
* No inte_guc_send command should ever take longer than 10ms.
* No GuC command should ever take longer than 10ms.
* Fast commands should still complete in 10us.
*/
ret = wait_for_us(guc_recv(guc, &status), 10);
if (ret)
ret = wait_for(guc_recv(guc, &status), 10);
ret = __intel_wait_for_register_fw(dev_priv,
SOFT_SCRATCH(0),
INTEL_GUC_RECV_MASK,
INTEL_GUC_RECV_MASK,
10, 10, &status);
if (status != INTEL_GUC_STATUS_SUCCESS) {
/*
* Either the GuC explicitly returned an error (which