From 51b63e334c5a4271b845d2eba0486c2b4f2bbda0 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Tue, 8 Oct 2013 23:39:33 +0100 Subject: lib: Add a small helper to open debugfs files Signed-off-by: Damien Lespiau --- lib/Makefile.am | 2 ++ lib/igt_debugfs.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ lib/igt_debugfs.h | 36 ++++++++++++++++++++++++++ 3 files changed, 113 insertions(+) create mode 100644 lib/igt_debugfs.c create mode 100644 lib/igt_debugfs.h diff --git a/lib/Makefile.am b/lib/Makefile.am index 387141bf..5710802e 100644 --- a/lib/Makefile.am +++ b/lib/Makefile.am @@ -11,6 +11,8 @@ libintel_tools_la_SOURCES = \ i830_reg.h \ i915_3d.h \ i915_reg.h \ + igt_debugfs.c \ + igt_debugfs.h \ instdone.c \ instdone.h \ intel_batchbuffer.c \ diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c new file mode 100644 index 00000000..33c4fc10 --- /dev/null +++ b/lib/igt_debugfs.c @@ -0,0 +1,75 @@ +/* + * Copyright © 2013 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. + * + */ + +#include +#include +#include +#include +#include +#include + +#include "igt_debugfs.h" + +int igt_debugfs_init(igt_debugfs_t *debugfs) +{ + const char *path = "/sys/kernel/debug"; + struct stat st; + int n; + + if (stat("/debug/dri", &st) == 0) { + path = "/debug/dri"; + goto find_minor; + } + + if (stat("/sys/kernel/debug/dri", &st) == 0) + goto find_minor; + + if (stat("/sys/kernel/debug", &st)) + return errno; + + if (mount("debug", "/sys/kernel/debug", "debugfs", 0, 0)) + return errno; + +find_minor: + strcpy(debugfs->root, path); + for (n = 0; n < 16; n++) { + int len = sprintf(debugfs->dri_path, "%s/dri/%d", path, n); + sprintf(debugfs->dri_path + len, "/i915_error_state"); + if (stat(debugfs->dri_path, &st) == 0) { + debugfs->dri_path[len] = '\0'; + return 0; + } + } + + debugfs->dri_path[0] = '\0'; + return ENOENT; +} + +int igt_debugfs_open(igt_debugfs_t *debugfs, const char *filename) +{ + char buf[1024]; + + sprintf(buf, "%s/%s", debugfs->dri_path, filename); + return open(buf, O_RDONLY); +} diff --git a/lib/igt_debugfs.h b/lib/igt_debugfs.h new file mode 100644 index 00000000..aa9449a8 --- /dev/null +++ b/lib/igt_debugfs.h @@ -0,0 +1,36 @@ +/* + * Copyright © 2013 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. + * + */ + +#ifndef __IGT_DEBUGFS_H__ +#define __IGT_DEBUGFS_H__ + +typedef struct { + char root[128]; + char dri_path[128]; +} igt_debugfs_t; + +int igt_debugfs_init(igt_debugfs_t *debugfs); +int igt_debugfs_open(igt_debugfs_t *debugfs, const char *filename); + +#endif /* __IGT_DEBUGFS_H__ */ -- cgit v1.2.3