diff options
author | Andrzej Hajda <andrzej.hajda@intel.com> | 2024-06-27 09:25:03 +0200 |
---|---|---|
committer | Kamil Konieczny <kamil.konieczny@linux.intel.com> | 2024-07-02 17:35:05 +0200 |
commit | 04e05e2aeff3a958572795ca0b2dec53074cf6ca (patch) | |
tree | 38cd7c8f697fc54192ae49d2c85128e41220d543 /lib | |
parent | 04e219dbe77bb759afe43681bad810f9aabf84c1 (diff) |
lib/igt_sysfs: add helpers to access engine sysfs directory
Helpers follow convention of xe_sysfs_gt_(path|open).
v7:
- staticize local const array
v8:
- added xe_ prefix to local helper
Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Kamil Konieczny <kamil.konieczny@linux.intel.com>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/igt_sysfs.c | 71 | ||||
-rw-r--r-- | lib/igt_sysfs.h | 3 |
2 files changed, 74 insertions, 0 deletions
diff --git a/lib/igt_sysfs.c b/lib/igt_sysfs.c index 0c5817eb1..ffeec1ca2 100644 --- a/lib/igt_sysfs.c +++ b/lib/igt_sysfs.c @@ -40,7 +40,9 @@ #include <dirent.h> #include <unistd.h> #include <fcntl.h> +#include <xe_drm.h> +#include "drmtest.h" #include "igt_core.h" #include "igt_sysfs.h" #include "igt_device.h" @@ -263,6 +265,75 @@ int xe_sysfs_gt_open(int xe_device, int gt) return open(path, O_RDONLY); } +static const char *xe_engine_class_to_str(__u16 class) +{ + static const char * const str[] = { + [DRM_XE_ENGINE_CLASS_RENDER] = "rcs", + [DRM_XE_ENGINE_CLASS_COPY] = "bcs", + [DRM_XE_ENGINE_CLASS_VIDEO_DECODE] = "vcs", + [DRM_XE_ENGINE_CLASS_VIDEO_ENHANCE] = "vecs", + [DRM_XE_ENGINE_CLASS_COMPUTE] = "ccs", + }; + + if (class < ARRAY_SIZE(str)) + return str[class]; + + return "unk"; +} + +/** + * xe_sysfs_engine_path: + * @xe_device: fd of the device + * @gt: gt number + * @class: engine class + * @path: buffer to fill with the sysfs gt path to the device + * @pathlen: length of @path buffer + * + * Returns: + * The directory path, or NULL on failure. + */ +char * +xe_sysfs_engine_path(int xe_device, int gt, int class, char *path, int pathlen) +{ + struct stat st; + int tile = IS_PONTEVECCHIO(intel_get_drm_devid(xe_device)) ? gt : 0; + + if (xe_device < 0) + return NULL; + + if (igt_debug_on(fstat(xe_device, &st)) || igt_debug_on(!S_ISCHR(st.st_mode))) + return NULL; + + snprintf(path, pathlen, "/sys/dev/char/%d:%d/device/tile%d/gt%d/engines/%s", + major(st.st_rdev), minor(st.st_rdev), tile, gt, xe_engine_class_to_str(class)); + + if (!access(path, F_OK)) + return path; + + return NULL; +} + +/** + * xe_sysfs_engine_open: + * @xe_device: fd of the device + * @gt: gt number + * @class: engine class + * + * This opens the sysfs gt directory corresponding to device and tile for use + * + * Returns: + * The directory fd, or -1 on failure. + */ +int xe_sysfs_engine_open(int xe_device, int gt, int class) +{ + char path[96]; + + if (!xe_sysfs_engine_path(xe_device, gt, class, path, sizeof(path))) + return -1; + + return open(path, O_RDONLY); +} + /** * igt_sysfs_gt_path: * @device: fd of the device diff --git a/lib/igt_sysfs.h b/lib/igt_sysfs.h index f37d80ec1..6c604d939 100644 --- a/lib/igt_sysfs.h +++ b/lib/igt_sysfs.h @@ -166,4 +166,7 @@ int xe_sysfs_gt_open(int xe_device, int gt); char *xe_sysfs_tile_path(int xe_device, int tile, char *path, int pathlen); int xe_sysfs_tile_open(int xe_device, int tile); int xe_sysfs_get_num_tiles(int xe_device); +char *xe_sysfs_engine_path(int xe_device, int gt, int class, char *path, int pathlen); +int xe_sysfs_engine_open(int xe_device, int gt, int class); + #endif /* __IGT_SYSFS_H__ */ |