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drm/i915/guc: Move check for fast memcpy_wc to relay creation

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We only need those fast memcpy_wc when we're using relay to read
continuous GuC log. Let's prevent the user from creating a relay if we
know we won't be able to keep up with GuC.

v2: Adjust the return value (Michał)

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180319095348.9716-6-michal.winiarski@intel.com
This commit is contained in:
Michał Winiarski 2018-03-19 10:53:41 +01:00 committed by Chris Wilson
parent 4977a287b9
commit b8299c71d4
1 changed files with 10 additions and 10 deletions
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20
drivers/gpu/drm/i915/intel_guc_log.c
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@ -466,16 +466,6 @@ int intel_guc_log_create(struct intel_guc_log *log)
GEM_BUG_ON(log->vma);
/*
* We require SSE 4.1 for fast reads from the GuC log buffer and
* it should be present on the chipsets supporting GuC based
* submisssions.
*/
if (WARN_ON(!i915_has_memcpy_from_wc())) {
ret = -EINVAL;
goto err;
}
vma = intel_guc_allocate_vma(guc, GUC_LOG_SIZE);
if (IS_ERR(vma)) {
ret = PTR_ERR(vma);
@ -574,6 +564,16 @@ int intel_guc_log_relay_open(struct intel_guc_log *log)
goto out_unlock;
}
/*
* We require SSE 4.1 for fast reads from the GuC log buffer and
* it should be present on the chipsets supporting GuC based
* submisssions.
*/
if (!i915_has_memcpy_from_wc()) {
ret = -ENXIO;
goto out_unlock;
}
ret = guc_log_relay_create(log);
if (ret)
goto out_unlock;