From: James Morse <james.morse@arm.com> maillist inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT Reference: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/log/?h=mpam/... --------------------------- MPAM's MSC support a number of monitors, each of which supports bandwidth counters, or cache-storage-utilisation counters. To use a counter, a monitor needs to be configured. Add helpers to allocate and free CSU or MBWU monitors. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- drivers/platform/mpam/mpam_devices.c | 2 ++ drivers/platform/mpam/mpam_internal.h | 35 +++++++++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/platform/mpam/mpam_devices.c b/drivers/platform/mpam/mpam_devices.c index 612c4b97d373..82dffe8c03ef 100644 --- a/drivers/platform/mpam/mpam_devices.c +++ b/drivers/platform/mpam/mpam_devices.c @@ -244,6 +244,8 @@ mpam_class_alloc(u8 level_idx, enum mpam_class_types type, gfp_t gfp) class->level = level_idx; class->type = type; INIT_LIST_HEAD_RCU(&class->classes_list); + ida_init(&class->ida_csu_mon); + ida_init(&class->ida_mbwu_mon); list_add_rcu(&class->classes_list, &mpam_classes); diff --git a/drivers/platform/mpam/mpam_internal.h b/drivers/platform/mpam/mpam_internal.h index 9b90f10b0436..19acb460aeba 100644 --- a/drivers/platform/mpam/mpam_internal.h +++ b/drivers/platform/mpam/mpam_internal.h @@ -138,6 +138,9 @@ struct mpam_class /* member of mpam_classes */ struct list_head classes_list; + + struct ida ida_csu_mon; + struct ida ida_mbwu_mon; }; struct mpam_config { @@ -191,6 +194,38 @@ struct mpam_msc_ris struct mpam_component *comp; }; +static inline int mpam_alloc_csu_mon(struct mpam_class *class) +{ + struct mpam_props *cprops = &class->props; + + if (!mpam_has_feature(mpam_feat_msmon_csu, cprops)) + return -EOPNOTSUPP; + + return ida_alloc_range(&class->ida_csu_mon, 0, cprops->num_csu_mon - 1, + GFP_KERNEL); +} + +static inline void mpam_free_csu_mon(struct mpam_class *class, int csu_mon) +{ + ida_free(&class->ida_csu_mon, csu_mon); +} + +static inline int mpam_alloc_mbwu_mon(struct mpam_class *class) +{ + struct mpam_props *cprops = &class->props; + + if (!mpam_has_feature(mpam_feat_msmon_mbwu, cprops)) + return -EOPNOTSUPP; + + return ida_alloc_range(&class->ida_mbwu_mon, 0, + cprops->num_mbwu_mon - 1, GFP_KERNEL); +} + +static inline void mpam_free_mbwu_mon(struct mpam_class *class, int mbwu_mon) +{ + ida_free(&class->ida_mbwu_mon, mbwu_mon); +} + /* List of all classes */ extern struct list_head mpam_classes; extern struct srcu_struct mpam_srcu; -- 2.25.1