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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2019 Intel Corporation4 */5 6#include "selftest_llc.h"7#include "intel_rps.h"8 9static int gen6_verify_ring_freq(struct intel_llc *llc)10{11 struct drm_i915_private *i915 = llc_to_gt(llc)->i915;12 struct ia_constants consts;13 intel_wakeref_t wakeref;14 unsigned int gpu_freq;15 int err = 0;16 17 wakeref = intel_runtime_pm_get(llc_to_gt(llc)->uncore->rpm);18 19 if (!get_ia_constants(llc, &consts))20 goto out_rpm;21 22 for (gpu_freq = consts.min_gpu_freq;23 gpu_freq <= consts.max_gpu_freq;24 gpu_freq++) {25 struct intel_rps *rps = &llc_to_gt(llc)->rps;26 27 unsigned int ia_freq, ring_freq, found;28 u32 val;29 30 calc_ia_freq(llc, gpu_freq, &consts, &ia_freq, &ring_freq);31 32 val = gpu_freq;33 if (snb_pcode_read(llc_to_gt(llc)->uncore, GEN6_PCODE_READ_MIN_FREQ_TABLE,34 &val, NULL)) {35 pr_err("Failed to read freq table[%d], range [%d, %d]\n",36 gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq);37 err = -ENXIO;38 break;39 }40 41 found = (val >> 0) & 0xff;42 if (found != ia_freq) {43 pr_err("Min freq table(%d/[%d, %d]):%dMHz did not match expected CPU freq, found %d, expected %d\n",44 gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq,45 intel_gpu_freq(rps, gpu_freq * (GRAPHICS_VER(i915) >= 9 ? GEN9_FREQ_SCALER : 1)),46 found, ia_freq);47 err = -EINVAL;48 break;49 }50 51 found = (val >> 8) & 0xff;52 if (found != ring_freq) {53 pr_err("Min freq table(%d/[%d, %d]):%dMHz did not match expected ring freq, found %d, expected %d\n",54 gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq,55 intel_gpu_freq(rps, gpu_freq * (GRAPHICS_VER(i915) >= 9 ? GEN9_FREQ_SCALER : 1)),56 found, ring_freq);57 err = -EINVAL;58 break;59 }60 }61 62out_rpm:63 intel_runtime_pm_put(llc_to_gt(llc)->uncore->rpm, wakeref);64 return err;65}66 67int st_llc_verify(struct intel_llc *llc)68{69 return gen6_verify_ring_freq(llc);70}71