| /* |
| * Copyright © 2012 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| * |
| * Authors: |
| * Ben Widawsky <ben@bwidawsk.net> |
| * |
| */ |
| |
| #define _GNU_SOURCE |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include "drmtest.h" |
| |
| static bool verbose = false; |
| static int origmin, origmax; |
| |
| #define restore_assert(COND) do { \ |
| if (!(COND)) { \ |
| writeval(stuff[MIN].filp, origmin); \ |
| writeval(stuff[MAX].filp, origmax); \ |
| igt_assert(0); \ |
| } \ |
| } while (0); |
| |
| static const char sysfs_base_path[] = "/sys/class/drm/card%d/gt_%s_freq_mhz"; |
| enum { |
| CUR, |
| MIN, |
| MAX, |
| RP0, |
| RP1, |
| RPn |
| }; |
| |
| struct junk { |
| const char *name; |
| const char *mode; |
| FILE *filp; |
| } stuff[] = { |
| { "cur", "r", NULL }, { "min", "rb+", NULL }, { "max", "rb+", NULL }, { "RP0", "r", NULL }, { "RP1", "r", NULL }, { "RPn", "r", NULL }, { NULL, NULL, NULL } |
| }; |
| |
| static int readval(FILE *filp) |
| { |
| int val; |
| int scanned; |
| |
| fflush(filp); |
| rewind(filp); |
| scanned = fscanf(filp, "%d", &val); |
| igt_assert(scanned == 1); |
| |
| return val; |
| } |
| |
| static int do_writeval(FILE *filp, int val, int lerrno) |
| { |
| /* Must write twice to sysfs since the first one simply calculates the size and won't return the error */ |
| int ret; |
| rewind(filp); |
| ret = fprintf(filp, "%d", val); |
| rewind(filp); |
| ret = fprintf(filp, "%d", val); |
| if (ret && lerrno) |
| igt_assert(errno = lerrno); |
| fflush(filp); |
| return ret; |
| } |
| #define writeval(filp, val) do_writeval(filp, val, 0) |
| |
| #define fcur (readval(stuff[CUR].filp)) |
| #define fmin (readval(stuff[MIN].filp)) |
| #define fmax (readval(stuff[MAX].filp)) |
| #define frp0 (readval(stuff[RP0].filp)) |
| #define frp1 (readval(stuff[RP1].filp)) |
| #define frpn (readval(stuff[RPn].filp)) |
| |
| static void setfreq(int val) |
| { |
| writeval(stuff[MIN].filp, val); |
| writeval(stuff[MAX].filp, val); |
| } |
| |
| static void checkit(void) |
| { |
| restore_assert(fmin <= fmax); |
| restore_assert(fcur <= fmax); |
| restore_assert(fmin <= fcur); |
| restore_assert(frpn <= fmin); |
| restore_assert(fmax <= frp0); |
| restore_assert(frp1 <= frp0); |
| restore_assert(frpn <= frp1); |
| restore_assert(frp0 != 0); |
| restore_assert(frp1 != 0); |
| } |
| |
| static void dumpit(void) |
| { |
| struct junk *junk = stuff; |
| do { |
| printf("gt frequency %s (MHz): %d\n", junk->name, readval(junk->filp)); |
| junk++; |
| } while(junk->name != NULL); |
| |
| printf("\n"); |
| } |
| |
| |
| int main(int argc, char *argv[]) |
| { |
| const int device = drm_get_card(); |
| struct junk *junk = stuff; |
| int fd, ret; |
| |
| igt_skip_on_simulation(); |
| |
| if (argc > 1) |
| verbose++; |
| |
| /* Use drm_open_any to verify device existence */ |
| fd = drm_open_any(); |
| close(fd); |
| |
| do { |
| int val = -1; |
| char *path; |
| ret = asprintf(&path, sysfs_base_path, device, junk->name); |
| igt_assert(ret != -1); |
| junk->filp = fopen(path, junk->mode); |
| igt_require(junk->filp); |
| |
| val = readval(junk->filp); |
| igt_assert(val >= 0); |
| junk++; |
| } while(junk->name != NULL); |
| |
| origmin = fmin; |
| origmax = fmax; |
| |
| if (verbose) |
| printf("Original min = %d\nOriginal max = %d\n", origmin, origmax); |
| |
| if (verbose) |
| dumpit(); |
| |
| checkit(); |
| setfreq(fmin); |
| if (verbose) |
| dumpit(); |
| restore_assert(fcur == fmin); |
| setfreq(fmax); |
| if (verbose) |
| dumpit(); |
| restore_assert(fcur == fmax); |
| checkit(); |
| |
| /* And some errors */ |
| writeval(stuff[MIN].filp, frpn - 1); |
| writeval(stuff[MAX].filp, frp0 + 1000); |
| checkit(); |
| |
| writeval(stuff[MIN].filp, fmax + 1000); |
| writeval(stuff[MAX].filp, fmin - 1); |
| checkit(); |
| |
| do_writeval(stuff[MIN].filp, 0x11111110, EINVAL); |
| do_writeval(stuff[MAX].filp, 0, EINVAL); |
| |
| writeval(stuff[MIN].filp, origmin); |
| writeval(stuff[MAX].filp, origmax); |
| |
| igt_success(); |
| } |