| 1 | // SPDX-License-Identifier: MIT |
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| 2 | /* |
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| 3 | * Copyright © 2019 Intel Corporation |
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| 4 | */ |
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| 5 | |
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| 6 | #include "selftest_llc.h" |
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| 7 | #include "intel_rps.h" |
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| 8 | |
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| 9 | static int gen6_verify_ring_freq(struct intel_llc *llc) |
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| 10 | { |
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| 11 | struct drm_i915_private *i915 = llc_to_gt(llc)->i915; |
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| 12 | struct ia_constants consts; |
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| 13 | intel_wakeref_t wakeref; |
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| 14 | unsigned int gpu_freq; |
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| 15 | int err = 0; |
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| 16 | |
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| 17 | wakeref = intel_runtime_pm_get(rpm: llc_to_gt(llc)->uncore->rpm); |
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| 18 | |
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| 19 | if (!get_ia_constants(llc, consts: &consts)) |
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| 20 | goto out_rpm; |
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| 21 | |
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| 22 | for (gpu_freq = consts.min_gpu_freq; |
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| 23 | gpu_freq <= consts.max_gpu_freq; |
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| 24 | gpu_freq++) { |
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| 25 | struct intel_rps *rps = &llc_to_gt(llc)->rps; |
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| 26 | |
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| 27 | unsigned int ia_freq, ring_freq, found; |
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| 28 | u32 val; |
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| 29 | |
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| 30 | calc_ia_freq(llc, gpu_freq, consts: &consts, out_ia_freq: &ia_freq, out_ring_freq: &ring_freq); |
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| 31 | |
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| 32 | val = gpu_freq; |
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| 33 | if (snb_pcode_read(uncore: llc_to_gt(llc)->uncore, GEN6_PCODE_READ_MIN_FREQ_TABLE, |
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| 34 | val: &val, NULL)) { |
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| 35 | pr_err("Failed to read freq table[%d], range [%d, %d]\n" , |
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| 36 | gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq); |
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| 37 | err = -ENXIO; |
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| 38 | break; |
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| 39 | } |
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| 40 | |
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| 41 | found = (val >> 0) & 0xff; |
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| 42 | if (found != ia_freq) { |
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| 43 | pr_err("Min freq table(%d/[%d, %d]):%dMHz did not match expected CPU freq, found %d, expected %d\n" , |
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| 44 | gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq, |
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| 45 | intel_gpu_freq(rps, gpu_freq * (GRAPHICS_VER(i915) >= 9 ? GEN9_FREQ_SCALER : 1)), |
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| 46 | found, ia_freq); |
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| 47 | err = -EINVAL; |
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| 48 | break; |
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| 49 | } |
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| 50 | |
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| 51 | found = (val >> 8) & 0xff; |
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| 52 | if (found != ring_freq) { |
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| 53 | pr_err("Min freq table(%d/[%d, %d]):%dMHz did not match expected ring freq, found %d, expected %d\n" , |
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| 54 | gpu_freq, consts.min_gpu_freq, consts.max_gpu_freq, |
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| 55 | intel_gpu_freq(rps, gpu_freq * (GRAPHICS_VER(i915) >= 9 ? GEN9_FREQ_SCALER : 1)), |
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| 56 | found, ring_freq); |
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| 57 | err = -EINVAL; |
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| 58 | break; |
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| 59 | } |
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| 60 | } |
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| 61 | |
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| 62 | out_rpm: |
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| 63 | intel_runtime_pm_put(rpm: llc_to_gt(llc)->uncore->rpm, wref: wakeref); |
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| 64 | return err; |
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| 65 | } |
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| 66 | |
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| 67 | int st_llc_verify(struct intel_llc *llc) |
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| 68 | { |
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| 69 | return gen6_verify_ring_freq(llc); |
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| 70 | } |
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| 71 | |
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