diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-03-25 13:15:02 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-03-25 14:33:05 +0300 |
| commit | 032d992dcbefb1e6a43832fa36c0da11b6b64741 (patch) | |
| tree | d996f6bfa5efe192bfc00f7a2e804e966dd38992 /drivers/gpu/drm/i915/intel_uncore.c | |
| parent | 9bf7c31386e511cc9671a252886dcb080bf08579 (diff) | |
| download | linux-032d992dcbefb1e6a43832fa36c0da11b6b64741.tar.xz | |
drm/i915/selftests: Measure the energy consumed while in RC6
Measure and compare the energy consumed, as reported by the rapl MSR,
by the GPU while in RC0 and RC6 states. Throw an error if RC6 does not
at least halve the energy consumption of RC0, as this more than likely
means we failed to enter RC0 correctly.
If we can't measure the energy draw with the MSR, then it will report 0
for both measurements. Since the measurement works on all gen6+, this seems
worth flagging as an error.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Andi Shyti <andi.shyti@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200325101502.12591-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/intel_uncore.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uncore.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index abb18b90d7c3..013312e9b55c 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -735,6 +735,28 @@ void intel_uncore_forcewake_put(struct intel_uncore *uncore, } /** + * intel_uncore_forcewake_flush - flush the delayed release + * @uncore: the intel_uncore structure + * @fw_domains: forcewake domains to flush + */ +void intel_uncore_forcewake_flush(struct intel_uncore *uncore, + enum forcewake_domains fw_domains) +{ + struct intel_uncore_forcewake_domain *domain; + unsigned int tmp; + + if (!uncore->funcs.force_wake_put) + return; + + fw_domains &= uncore->fw_domains; + for_each_fw_domain_masked(domain, fw_domains, uncore, tmp) { + WRITE_ONCE(domain->active, false); + if (hrtimer_cancel(&domain->timer)) + intel_uncore_fw_release_timer(&domain->timer); + } +} + +/** * intel_uncore_forcewake_put__locked - grab forcewake domain references * @uncore: the intel_uncore structure * @fw_domains: forcewake domains to get reference on |