Use default of 0 where GT id is not being used. Fixes: https://gitlab.freedesktop.org/drm/intel/-/issues/8308 v2: Add a helper for GT 0 (Ashutosh) v3: Additional review comments (Ashutosh) v4: Return false if slpc debugfs is not found Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx> --- lib/igt_pm.c | 37 ++++++++++++++++++++++++++++--------- lib/igt_pm.h | 3 ++- 2 files changed, 30 insertions(+), 10 deletions(-) diff --git a/lib/igt_pm.c b/lib/igt_pm.c index 704acf7d..e60b09a7 100644 --- a/lib/igt_pm.c +++ b/lib/igt_pm.c @@ -1329,21 +1329,40 @@ void igt_pm_print_pci_card_runtime_status(void) } } -bool i915_is_slpc_enabled(int fd) +/** + * i915_is_slpc_enabled_gt: + * @drm_fd: DRM file descriptor + * @gt: GT id + * Check if SLPC is enabled on a GT + */ +bool i915_is_slpc_enabled_gt(int drm_fd, int gt) { - int debugfs_fd = igt_debugfs_dir(fd); + int dir, debugfs_fd; char buf[4096] = {}; - int len; - igt_require(debugfs_fd != -1); + dir = igt_debugfs_gt_dir(drm_fd, gt); + igt_require(dir); + + debugfs_fd = openat(dir, "uc/guc_slpc_info", O_RDONLY); + /* if guc_slpc_info not present then return false */ + if (debugfs_fd < 0) + return false; + + read(debugfs_fd, buf, sizeof(buf)-1); - len = igt_debugfs_simple_read(debugfs_fd, "gt/uc/guc_slpc_info", buf, sizeof(buf)); close(debugfs_fd); - if (len < 0) - return false; - else - return strstr(buf, "SLPC state: running"); + return strstr(buf, "SLPC state: running"); +} + +/** + * i915_is_slpc_enabled: + * @drm_fd: DRM file descriptor + * Check if SLPC is enabled for the device + */ +bool i915_is_slpc_enabled(int drm_fd) +{ + return i915_is_slpc_enabled_gt(drm_fd, 0); } int igt_pm_get_runtime_suspended_time(struct pci_device *pci_dev) diff --git a/lib/igt_pm.h b/lib/igt_pm.h index d0d6d673..448cf42d 100644 --- a/lib/igt_pm.h +++ b/lib/igt_pm.h @@ -84,7 +84,8 @@ void igt_pm_set_d3cold_allowed(struct igt_device_card *card, const char *val); void igt_pm_setup_pci_card_runtime_pm(struct pci_device *pci_dev); void igt_pm_restore_pci_card_runtime_pm(void); void igt_pm_print_pci_card_runtime_status(void); -bool i915_is_slpc_enabled(int fd); +bool i915_is_slpc_enabled_gt(int drm_fd, int gt); +bool i915_is_slpc_enabled(int drm_fd); int igt_pm_get_runtime_suspended_time(struct pci_device *pci_dev); int igt_pm_get_runtime_usage(struct pci_device *pci_dev); -- 2.38.1
