185 lines
4.1 KiB
C
185 lines
4.1 KiB
C
/*
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* Copyright © 2013 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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*/
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include "igt_perf.h"
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#include "gpu-freq.h"
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#include "debugfs.h"
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static int perf_open(void)
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{
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int fd;
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fd = perf_i915_open_group(I915_PMU_ACTUAL_FREQUENCY, -1);
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if (perf_i915_open_group(I915_PMU_REQUESTED_FREQUENCY, fd) < 0) {
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close(fd);
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fd = -1;
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}
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return fd;
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}
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int gpu_freq_init(struct gpu_freq *gf)
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{
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char buf[4096], *s;
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int fd, len = -1;
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memset(gf, 0, sizeof(*gf));
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gf->fd = perf_open();
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sprintf(buf, "%s/i915_frequency_info", debugfs_dri_path);
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fd = open(buf, 0);
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if (fd < 0) {
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sprintf(buf, "%s/i915_cur_delayinfo", debugfs_dri_path);
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fd = open(buf, 0);
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}
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if (fd < 0)
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return gf->error = errno;
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len = read(fd, buf, sizeof(buf)-1);
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close(fd);
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if (len < 0)
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goto err;
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buf[len] = '\0';
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if (strstr(buf, "PUNIT_REG_GPU_FREQ_STS")) {
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/* Baytrail is special, ofc. */
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gf->is_byt = 1;
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s = strstr(buf, "max");
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if (s != NULL)
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sscanf(s, "max GPU freq: %d MHz", &gf->max);
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s = strstr(buf, "min");
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if (s != NULL)
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sscanf(s, "min GPU freq: %d MHz", &gf->min);
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gf->rp0 = gf->rp1 = gf->max;
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gf->rpn = gf->min;
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} else {
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s = strstr(buf, "(RPN)");
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if (s == NULL)
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goto err;
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sscanf(s, "(RPN) frequency: %dMHz", &gf->rpn);
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s = strstr(s, "(RP1)");
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if (s == NULL)
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goto err;
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sscanf(s, "(RP1) frequency: %dMHz", &gf->rp1);
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s = strstr(s, "(RP0)");
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if (s == NULL)
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goto err;
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sscanf(s, "(RP0) frequency: %dMHz", &gf->rp0);
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s = strstr(s, "Max");
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if (s == NULL)
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goto err;
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sscanf(s, "Max overclocked frequency: %dMHz", &gf->max);
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gf->min = gf->rpn;
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}
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return 0;
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err:
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return gf->error = EIO;
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}
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int gpu_freq_update(struct gpu_freq *gf)
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{
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if (gf->error)
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return gf->error;
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if (gf->fd < 0) {
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char buf[4096], *s;
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int fd, len = -1;
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sprintf(buf, "%s/i915_frequency_info", debugfs_dri_path);
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fd = open(buf, 0);
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if (fd < 0) {
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sprintf(buf, "%s/i915_cur_delayinfo", debugfs_dri_path);
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fd = open(buf, 0);
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}
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if (fd < 0)
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return gf->error = errno;
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len = read(fd, buf, sizeof(buf)-1);
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close(fd);
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if (len < 0)
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return gf->error = EIO;
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buf[len] = '\0';
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if (gf->is_byt) {
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s = strstr(buf, "current");
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if (s)
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sscanf(s, "current GPU freq: %d MHz", &gf->current);
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gf->request = gf->current;
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} else {
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s = strstr(buf, "RPNSWREQ:");
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if (s)
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sscanf(s, "RPNSWREQ: %dMHz", &gf->request);
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s = strstr(buf, "CAGF:");
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if (s)
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sscanf(s, "CAGF: %dMHz", &gf->current);
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}
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} else {
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struct gpu_freq_stat *s = &gf->stat[gf->count++&1];
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struct gpu_freq_stat *d = &gf->stat[gf->count&1];
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uint64_t data[4], d_time;
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int len;
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len = read(gf->fd, data, sizeof(data));
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if (len < 0)
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return gf->error = errno;
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s->timestamp = data[1];
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s->act = data[2];
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s->req = data[3];
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if (gf->count == 1)
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return EAGAIN;
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d_time = s->timestamp - d->timestamp;
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if (d_time == 0) {
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gf->count--;
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return EAGAIN;
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}
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gf->current = (s->act - d->act) * 1e9 / d_time;
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gf->request = (s->req - d->req) * 1e9 / d_time;
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}
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return 0;
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}
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