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/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2019 Intel Corporation
*/
#include "intel_pm.h" /* intel_gpu_freq() */
#include "selftest_llc.h"
#include "intel_rps.h"
static int gen6_verify_ring_freq(struct intel_llc *llc)
{
struct drm_i915_private *i915 = llc_to_gt(llc)->i915;
struct ia_constants consts;
intel_wakeref_t wakeref;
unsigned int gpu_freq;
int err = 0;
wakeref = intel_runtime_pm_get(llc_to_gt(llc)->uncore->rpm);
if (!get_ia_constants(llc, &consts)) {
err = -ENODEV;
goto out_rpm;
}
for (gpu_freq = consts.min_gpu_freq;
gpu_freq <= consts.max_gpu_freq;
gpu_freq++) {
struct intel_rps *rps = &llc_to_gt(llc)->rps;
unsigned int ia_freq, ring_freq, found;
u32 val;
calc_ia_freq(llc, gpu_freq, &consts, &ia_freq, &ring_freq);
val = gpu_freq;
if (sandybridge_pcode_read(i915,
GEN6_PCODE_READ_MIN_FREQ_TABLE,
&val, NULL)) {
pr_err("Failed to read freq table[%d], range [%d, %d]\n",
gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq);
err = -ENXIO;
break;
}
found = (val >> 0) & 0xff;
if (found != ia_freq) {
pr_err("Min freq table(%d/[%d, %d]):%dMHz did not match expected CPU freq, found %d, expected %d\n",
gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq,
intel_gpu_freq(rps, gpu_freq * (INTEL_GEN(i915) >= 9 ? GEN9_FREQ_SCALER : 1)),
found, ia_freq);
err = -EINVAL;
break;
}
found = (val >> 8) & 0xff;
if (found != ring_freq) {
pr_err("Min freq table(%d/[%d, %d]):%dMHz did not match expected ring freq, found %d, expected %d\n",
gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq,
intel_gpu_freq(rps, gpu_freq * (INTEL_GEN(i915) >= 9 ? GEN9_FREQ_SCALER : 1)),
found, ring_freq);
err = -EINVAL;
break;
}
}
out_rpm:
intel_runtime_pm_put(llc_to_gt(llc)->uncore->rpm, wakeref);
return err;
}
int st_llc_verify(struct intel_llc *llc)
{
int err = 0;
if (HAS_LLC(llc_to_gt(llc)->i915))
err = gen6_verify_ring_freq(llc);
return err;
}
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