2dc06e2324
There should be no functional change here because Broxton and CHV are both gt1. Without this code however, it might seem like broxton support is missing. While here, put the gt1 check in front to hopefully short-circuit the condition for the mobile cases. Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com> Reviewed-by: Francisco Jerez <currojerez@riseup.net>
307 lines
9.0 KiB
C
307 lines
9.0 KiB
C
/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <math.h>
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#include "util/macros.h"
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#include "main/macros.h"
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#include "gen_l3_config.h"
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/**
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* IVB/HSW validated L3 configurations. The first entry will be used as
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* default by gen7_restore_default_l3_config(), otherwise the ordering is
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* unimportant.
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*/
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static const struct gen_l3_config ivb_l3_configs[] = {
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/* SLM URB ALL DC RO IS C T */
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{{ 0, 32, 0, 0, 32, 0, 0, 0 }},
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{{ 0, 32, 0, 16, 16, 0, 0, 0 }},
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{{ 0, 32, 0, 4, 0, 8, 4, 16 }},
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{{ 0, 28, 0, 8, 0, 8, 4, 16 }},
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{{ 0, 28, 0, 16, 0, 8, 4, 8 }},
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{{ 0, 28, 0, 8, 0, 16, 4, 8 }},
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{{ 0, 28, 0, 0, 0, 16, 4, 16 }},
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{{ 0, 32, 0, 0, 0, 16, 0, 16 }},
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{{ 0, 28, 0, 4, 32, 0, 0, 0 }},
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{{ 16, 16, 0, 16, 16, 0, 0, 0 }},
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{{ 16, 16, 0, 8, 0, 8, 8, 8 }},
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{{ 16, 16, 0, 4, 0, 8, 4, 16 }},
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{{ 16, 16, 0, 4, 0, 16, 4, 8 }},
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{{ 16, 16, 0, 0, 32, 0, 0, 0 }},
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{{ 0 }}
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};
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/**
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* VLV validated L3 configurations. \sa ivb_l3_configs.
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*/
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static const struct gen_l3_config vlv_l3_configs[] = {
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/* SLM URB ALL DC RO IS C T */
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{{ 0, 64, 0, 0, 32, 0, 0, 0 }},
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{{ 0, 80, 0, 0, 16, 0, 0, 0 }},
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{{ 0, 80, 0, 8, 8, 0, 0, 0 }},
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{{ 0, 64, 0, 16, 16, 0, 0, 0 }},
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{{ 0, 60, 0, 4, 32, 0, 0, 0 }},
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{{ 32, 32, 0, 16, 16, 0, 0, 0 }},
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{{ 32, 40, 0, 8, 16, 0, 0, 0 }},
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{{ 32, 40, 0, 16, 8, 0, 0, 0 }},
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{{ 0 }}
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};
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/**
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* BDW validated L3 configurations. \sa ivb_l3_configs.
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*/
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static const struct gen_l3_config bdw_l3_configs[] = {
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/* SLM URB ALL DC RO IS C T */
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{{ 0, 48, 48, 0, 0, 0, 0, 0 }},
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{{ 0, 48, 0, 16, 32, 0, 0, 0 }},
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{{ 0, 32, 0, 16, 48, 0, 0, 0 }},
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{{ 0, 32, 0, 0, 64, 0, 0, 0 }},
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{{ 0, 32, 64, 0, 0, 0, 0, 0 }},
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{{ 24, 16, 48, 0, 0, 0, 0, 0 }},
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{{ 24, 16, 0, 16, 32, 0, 0, 0 }},
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{{ 24, 16, 0, 32, 16, 0, 0, 0 }},
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{{ 0 }}
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};
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/**
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* CHV/SKL validated L3 configurations. \sa ivb_l3_configs.
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*/
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static const struct gen_l3_config chv_l3_configs[] = {
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/* SLM URB ALL DC RO IS C T */
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{{ 0, 48, 48, 0, 0, 0, 0, 0 }},
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{{ 0, 48, 0, 16, 32, 0, 0, 0 }},
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{{ 0, 32, 0, 16, 48, 0, 0, 0 }},
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{{ 0, 32, 0, 0, 64, 0, 0, 0 }},
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{{ 0, 32, 64, 0, 0, 0, 0, 0 }},
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{{ 32, 16, 48, 0, 0, 0, 0, 0 }},
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{{ 32, 16, 0, 16, 32, 0, 0, 0 }},
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{{ 32, 16, 0, 32, 16, 0, 0, 0 }},
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{{ 0 }}
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};
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/**
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* Return a zero-terminated array of validated L3 configurations for the
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* specified device.
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*/
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static const struct gen_l3_config *
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get_l3_configs(const struct gen_device_info *devinfo)
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{
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switch (devinfo->gen) {
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case 7:
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return (devinfo->is_baytrail ? vlv_l3_configs : ivb_l3_configs);
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case 8:
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return (devinfo->is_cherryview ? chv_l3_configs : bdw_l3_configs);
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case 9:
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return chv_l3_configs;
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default:
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unreachable("Not implemented");
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}
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}
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/**
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* L1-normalize a vector of L3 partition weights.
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*/
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static struct gen_l3_weights
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norm_l3_weights(struct gen_l3_weights w)
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{
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float sz = 0;
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for (unsigned i = 0; i < GEN_NUM_L3P; i++)
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sz += w.w[i];
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for (unsigned i = 0; i < GEN_NUM_L3P; i++)
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w.w[i] /= sz;
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return w;
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}
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/**
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* Get the relative partition weights of the specified L3 configuration.
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*/
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struct gen_l3_weights
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gen_get_l3_config_weights(const struct gen_l3_config *cfg)
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{
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if (cfg) {
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struct gen_l3_weights w;
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for (unsigned i = 0; i < GEN_NUM_L3P; i++)
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w.w[i] = cfg->n[i];
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return norm_l3_weights(w);
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} else {
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const struct gen_l3_weights w = { { 0 } };
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return w;
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}
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}
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/**
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* Distance between two L3 configurations represented as vectors of weights.
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* Usually just the L1 metric except when the two configurations are
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* considered incompatible in which case the distance will be infinite. Note
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* that the compatibility condition is asymmetric -- They will be considered
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* incompatible whenever the reference configuration \p w0 requires SLM, DC,
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* or URB but \p w1 doesn't provide it.
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*/
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float
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gen_diff_l3_weights(struct gen_l3_weights w0, struct gen_l3_weights w1)
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{
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if ((w0.w[GEN_L3P_SLM] && !w1.w[GEN_L3P_SLM]) ||
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(w0.w[GEN_L3P_DC] && !w1.w[GEN_L3P_DC] && !w1.w[GEN_L3P_ALL]) ||
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(w0.w[GEN_L3P_URB] && !w1.w[GEN_L3P_URB])) {
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return HUGE_VALF;
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} else {
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float dw = 0;
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for (unsigned i = 0; i < GEN_NUM_L3P; i++)
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dw += fabs(w0.w[i] - w1.w[i]);
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return dw;
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}
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}
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/**
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* Return a reasonable default L3 configuration for the specified device based
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* on whether SLM and DC are required. In the non-SLM non-DC case the result
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* is intended to approximately resemble the hardware defaults.
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*/
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struct gen_l3_weights
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gen_get_default_l3_weights(const struct gen_device_info *devinfo,
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bool needs_dc, bool needs_slm)
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{
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struct gen_l3_weights w = {{ 0 }};
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w.w[GEN_L3P_SLM] = needs_slm;
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w.w[GEN_L3P_URB] = 1.0;
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if (devinfo->gen >= 8) {
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w.w[GEN_L3P_ALL] = 1.0;
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} else {
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w.w[GEN_L3P_DC] = needs_dc ? 0.1 : 0;
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w.w[GEN_L3P_RO] = devinfo->is_baytrail ? 0.5 : 1.0;
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}
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return norm_l3_weights(w);
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}
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/**
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* Get the default L3 configuration
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*/
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const struct gen_l3_config *
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gen_get_default_l3_config(const struct gen_device_info *devinfo)
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{
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/* For efficiency assume that the first entry of the array matches the
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* default configuration.
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*/
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const struct gen_l3_config *const cfg = get_l3_configs(devinfo);
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assert(cfg == gen_get_l3_config(devinfo,
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gen_get_default_l3_weights(devinfo, false, false)));
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return cfg;
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}
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/**
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* Return the closest validated L3 configuration for the specified device and
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* weight vector.
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*/
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const struct gen_l3_config *
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gen_get_l3_config(const struct gen_device_info *devinfo,
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struct gen_l3_weights w0)
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{
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const struct gen_l3_config *const cfgs = get_l3_configs(devinfo);
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const struct gen_l3_config *cfg_best = NULL;
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float dw_best = HUGE_VALF;
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for (const struct gen_l3_config *cfg = cfgs; cfg->n[GEN_L3P_URB]; cfg++) {
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const float dw = gen_diff_l3_weights(w0, gen_get_l3_config_weights(cfg));
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if (dw < dw_best) {
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cfg_best = cfg;
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dw_best = dw;
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}
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}
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return cfg_best;
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}
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/**
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* Return the size of an L3 way in KB.
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*/
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static unsigned
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get_l3_way_size(const struct gen_device_info *devinfo)
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{
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if (devinfo->is_baytrail)
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return 2;
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else if (devinfo->gt == 1 ||
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devinfo->is_cherryview ||
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devinfo->is_broxton)
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return 4;
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else
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return 8 * devinfo->num_slices;
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}
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/**
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* Return the unit brw_context::urb::size is expressed in, in KB. \sa
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* gen_device_info::urb::size.
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*/
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static unsigned
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get_urb_size_scale(const struct gen_device_info *devinfo)
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{
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return (devinfo->gen >= 8 ? devinfo->num_slices : 1);
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}
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unsigned
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gen_get_l3_config_urb_size(const struct gen_device_info *devinfo,
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const struct gen_l3_config *cfg)
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{
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/* From the SKL "L3 Allocation and Programming" documentation:
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*
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* "URB is limited to 1008KB due to programming restrictions. This is not
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* a restriction of the L3 implementation, but of the FF and other clients.
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* Therefore, in a GT4 implementation it is possible for the programmed
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* allocation of the L3 data array to provide 3*384KB=1152KB for URB, but
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* only 1008KB of this will be used."
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*/
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const unsigned max = (devinfo->gen == 9 ? 1008 : ~0);
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return MIN2(max, cfg->n[GEN_L3P_URB] * get_l3_way_size(devinfo)) /
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get_urb_size_scale(devinfo);
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}
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/**
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* Print out the specified L3 configuration.
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*/
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void
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gen_dump_l3_config(const struct gen_l3_config *cfg, FILE *fp)
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{
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fprintf(stderr, "SLM=%d URB=%d ALL=%d DC=%d RO=%d IS=%d C=%d T=%d\n",
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cfg->n[GEN_L3P_SLM], cfg->n[GEN_L3P_URB], cfg->n[GEN_L3P_ALL],
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cfg->n[GEN_L3P_DC], cfg->n[GEN_L3P_RO],
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cfg->n[GEN_L3P_IS], cfg->n[GEN_L3P_C], cfg->n[GEN_L3P_T]);
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}
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