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d="scan'208";a="49221730" Received: from lab-ah.igk.intel.com ([10.102.138.202]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2024 00:25:26 -0700 From: Andrzej Hajda Date: Thu, 27 Jun 2024 09:25:03 +0200 Subject: [PATCH v8 4/5] lib/igt_sysfs: add helpers to access engine sysfs directory MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20240627-iga64_inline_ups-v8-4-08605c9360d3@intel.com> References: <20240627-iga64_inline_ups-v8-0-08605c9360d3@intel.com> In-Reply-To: <20240627-iga64_inline_ups-v8-0-08605c9360d3@intel.com> To: igt-dev@lists.freedesktop.org Cc: Kamil Konieczny , Dominik Grzegorzek , Christoph Manszewski , =?utf-8?q?Zbigniew_Kempczy=C5=84ski?= , Gwan-gyeong Mun , Andrzej Hajda X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3243; i=andrzej.hajda@intel.com; h=from:subject:message-id; bh=TTszHYYpvtNdV/9VQje3j7/mkWW9CWpNF2tCqUWydBM=; b=owEB7QES/pANAwAKASNispPeEP3XAcsmYgBmfRPdt4SArFe8Leju2XeUdqpN4FKTJLHQ/5svR/Kw ZGbaXa6JAbMEAAEKAB0WIQT8qEQxNN2/XeF/A00jYrKT3hD91wUCZn0T3QAKCRAjYrKT3hD917XqDA Czn47TPBaqmh7f8yk/+DvqF5iXDcVtLKRu1yFqvuu43/uisQeEKxsNGDIn+mB0+yaiaHgrSVmTY9Uv MdZA/T7T43fSqJU+lfisnFgGCGqfoF1dIWbk5fUwze+nLTfVVwC7xK2/laHne46VTJDgLmyQqqiyoW bnsox8YINOdQD14IzdMoTF3be0MOyki+RnpMdUgwlvj0pz597lKqAq0owkbSlZ+wxdsUv5rL1HGkvM ZQpSFql4j7MAyOtO10wAqs9/T8izSi+dYMn9pwecd1ygqHc57AyUxTF7kgvbts+y/8XbuyNGp6Hc0B CXZ8U5BQPhwb3m6Rk7m1NHrN11UkGqQi4X1Ntgp0mFxadB3q/9DRl9840tfNIz1a+zwclTrlagOEF8 TgYxo10kniaF0cKJHUoKlIqBpmOqFUddshPVpv4DooffTuAt3Ae0X4LdH+fizWp51zNTKNS3Ndy7jW 1TTBswoiGjWolhsZU7zbEFZtjdPRVOoyEb9jVOBW9hCjw= X-Developer-Key: i=andrzej.hajda@intel.com; a=openpgp; fpr=FCA8443134DDBF5DE17F034D2362B293DE10FDD7 X-BeenThere: igt-dev@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development mailing list for IGT GPU Tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: igt-dev-bounces@lists.freedesktop.org Sender: "igt-dev" 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 Reviewed-by: Kamil Konieczny --- lib/igt_sysfs.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ lib/igt_sysfs.h | 3 +++ 2 files changed, 74 insertions(+) diff --git a/lib/igt_sysfs.c b/lib/igt_sysfs.c index 0c5817eb1580..ffeec1ca2132 100644 --- a/lib/igt_sysfs.c +++ b/lib/igt_sysfs.c @@ -40,7 +40,9 @@ #include #include #include +#include +#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 f37d80ec130e..6c604d939013 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__ */ -- 2.34.1