arm_mpam: Probe the hardware features resctrl supports

Expand the probing support with the control and monitor types
we can use with resctrl.

CC: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Peter Newman <peternewman@google.com>
Tested-by: Carl Worth <carl@os.amperecomputing.com>
Tested-by: Gavin Shan <gshan@redhat.com>
Tested-by: Zeng Heng <zengheng4@huawei.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/resctrl/mpam_internal.h b/drivers/resctrl/mpam_internal.h
index 97f02cf92d7a..cdaa019367e9 100644
--- a/drivers/resctrl/mpam_internal.h
+++ b/drivers/resctrl/mpam_internal.h
@@ -5,12 +5,14 @@
 #define MPAM_INTERNAL_H
 
 #include <linux/arm_mpam.h>
+#include <linux/bitmap.h>
 #include <linux/cpumask.h>
 #include <linux/io.h>
 #include <linux/llist.h>
 #include <linux/mutex.h>
 #include <linux/srcu.h>
 #include <linux/spinlock.h>
+#include <linux/srcu.h>
 #include <linux/types.h>
 
 #define MPAM_MSC_MAX_NUM_RIS	16
@@ -112,6 +114,33 @@ static inline void mpam_mon_sel_lock_init(struct mpam_msc *msc)
 	raw_spin_lock_init(&msc->_mon_sel_lock);
 }
 
+/* Bits for mpam features bitmaps */
+enum mpam_device_features {
+	mpam_feat_cpor_part,
+	mpam_feat_mbw_part,
+	mpam_feat_mbw_min,
+	mpam_feat_mbw_max,
+	mpam_feat_msmon,
+	mpam_feat_msmon_csu,
+	mpam_feat_msmon_csu_hw_nrdy,
+	mpam_feat_msmon_mbwu,
+	mpam_feat_msmon_mbwu_hw_nrdy,
+	MPAM_FEATURE_LAST
+};
+
+struct mpam_props {
+	DECLARE_BITMAP(features, MPAM_FEATURE_LAST);
+
+	u16			cpbm_wd;
+	u16			mbw_pbm_bits;
+	u16			bwa_wd;
+	u16			num_csu_mon;
+	u16			num_mbwu_mon;
+};
+
+#define mpam_has_feature(_feat, x)	test_bit(_feat, (x)->features)
+#define mpam_set_feature(_feat, x)	set_bit(_feat, (x)->features)
+
 struct mpam_class {
 	/* mpam_components in this class */
 	struct list_head	components;
@@ -151,6 +180,8 @@ struct mpam_vmsc {
 	/* mpam_msc_ris in this vmsc */
 	struct list_head	ris;
 
+	struct mpam_props	props;
+
 	/* All RIS in this vMSC are members of this MSC */
 	struct mpam_msc		*msc;
 
@@ -162,6 +193,8 @@ struct mpam_vmsc {
 
 struct mpam_msc_ris {
 	u8			ris_idx;
+	u64			idr;
+	struct mpam_props	props;
 
 	cpumask_t		affinity;