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Message-Id: <20260119-ssqosid-cbqri-v1-5-aa2a75153832@kernel.org>
Date: Mon, 19 Jan 2026 20:14:42 -0800
From: Drew Fustini <fustini@...nel.org>
To: Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
Radim Krčmář <rkrcmar@...tanamicro.com>,
Samuel Holland <samuel.holland@...ive.com>,
Adrien Ricciardi <aricciardi@...libre.com>,
Nicolas Pitre <npitre@...libre.com>,
Kornel Dulęba <mindal@...ihalf.com>,
Atish Patra <atish.patra@...ux.dev>,
Atish Kumar Patra <atishp@...osinc.com>,
Vasudevan Srinivasan <vasu@...osinc.com>, Ved Shanbhogue <ved@...osinc.com>,
yunhui cui <cuiyunhui@...edance.com>, Chen Pei <cp0613@...ux.alibaba.com>,
Liu Zhiwei <zhiwei_liu@...ux.alibaba.com>, Weiwei Li <liwei1518@...il.com>,
guo.wenjia23@....com.cn, liu.qingtao2@....com.cn,
Conor Dooley <conor+dt@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>, Rob Herring <robh+dt@...nel.org>,
Reinette Chatre <reinette.chatre@...el.com>,
Tony Luck <tony.luck@...el.com>, Babu Moger <babu.moger@....com>,
Peter Newman <peternewman@...gle.com>, Fenghua Yu <fenghua.yu@...el.com>,
James Morse <james.morse@....com>, Ben Horgan <ben.horgan@....com>,
Dave Martin <Dave.Martin@....com>, Drew Fustini <fustini@...nel.org>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-riscv@...ts.infradead.org, x86@...nel.org
Subject: [PATCH RFC 05/19] RISC-V: QoS: define CBQRI capacity and bandwidth
capabilities
Define data structures to store the capacity and bandwidth capabilities
that are discovered for a CBQRI-capable controller.
Co-developed-by: Adrien Ricciardi <aricciardi@...libre.com>
Signed-off-by: Adrien Ricciardi <aricciardi@...libre.com>
Signed-off-by: Drew Fustini <fustini@...nel.org>
---
arch/riscv/kernel/qos/internal.h | 128 +++++++++++++++++++++++++++++++++++++++
1 file changed, 128 insertions(+)
diff --git a/arch/riscv/kernel/qos/internal.h b/arch/riscv/kernel/qos/internal.h
new file mode 100644
index 000000000000..ff2c7eff50be
--- /dev/null
+++ b/arch/riscv/kernel/qos/internal.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _ASM_RISCV_QOS_INTERNAL_H
+#define _ASM_RISCV_QOS_INTERNAL_H
+
+#include <linux/resctrl.h>
+
+#define CBQRI_CC_CAPABILITIES_OFF 0
+#define CBQRI_CC_MON_CTL_OFF 8
+#define CBQRI_CC_MON_CTL_VAL_OFF 16
+#define CBQRI_CC_ALLOC_CTL_OFF 24
+#define CBQRI_CC_BLOCK_MASK_OFF 32
+
+#define CBQRI_BC_CAPABILITIES_OFF 0
+#define CBQRI_BC_MON_CTL_OFF 8
+#define CBQRI_BC_MON_CTR_VAL_OFF 16
+#define CBQRI_BC_ALLOC_CTL_OFF 24
+#define CBQRI_BC_BW_ALLOC_OFF 32
+
+#define CBQRI_CC_CAPABILITIES_VER_MINOR_MASK GENMASK(3, 0)
+#define CBQRI_CC_CAPABILITIES_VER_MAJOR_MASK GENMASK(7, 4)
+
+#define CBQRI_CC_CAPABILITIES_FRCID_MASK 0x1
+#define CBQRI_CC_CAPABILITIES_FRCID_SHIFT 24
+
+#define CBQRI_CC_CAPABILITIES_NCBLKS_SHIFT 8
+#define CBQRI_CC_CAPABILITIES_NCBLKS_MASK 0xFFFF
+
+#define CBQRI_BC_CAPABILITIES_VER_MINOR_MASK GENMASK(3, 0)
+#define CBQRI_BC_CAPABILITIES_VER_MAJOR_MASK GENMASK(7, 4)
+
+#define CBQRI_BC_CAPABILITIES_NBWBLKS_SHIFT 8
+#define CBQRI_BC_CAPABILITIES_NBWBLKS_MASK 0xFFFF
+#define CBQRI_BC_CAPABILITIES_MRBWB_SHIFT 32
+#define CBQRI_BC_CAPABILITIES_MRBWB_MASK 0xFFFF
+
+#define CBQRI_CONTROL_REGISTERS_BUSY_SHIFT 39
+#define CBQRI_CONTROL_REGISTERS_BUSY_MASK 0x01
+#define CBQRI_CONTROL_REGISTERS_STATUS_SHIFT 32
+#define CBQRI_CONTROL_REGISTERS_STATUS_MASK 0x7F
+#define CBQRI_CONTROL_REGISTERS_OP_SHIFT 0
+#define CBQRI_CONTROL_REGISTERS_OP_MASK 0x1F
+#define CBQRI_CONTROL_REGISTERS_AT_SHIFT 5
+#define CBQRI_CONTROL_REGISTERS_AT_MASK 0x07
+#define CBQRI_CONTROL_REGISTERS_AT_DATA 0
+#define CBQRI_CONTROL_REGISTERS_AT_CODE 1
+#define CBQRI_CONTROL_REGISTERS_RCID_SHIFT 8
+#define CBQRI_CONTROL_REGISTERS_RCID_MASK 0xFFF
+#define CBQRI_CONTROL_REGISTERS_RBWB_SHIFT 0
+#define CBQRI_CONTROL_REGISTERS_RBWB_MASK 0xFFFF
+
+#define CBQRI_CC_MON_CTL_OP_CONFIG_EVENT 1
+#define CBQRI_CC_MON_CTL_OP_READ_COUNTER 2
+#define CBQRI_CC_MON_CTL_STATUS_SUCCESS 1
+
+#define CBQRI_CC_ALLOC_CTL_OP_CONFIG_LIMIT 1
+#define CBQRI_CC_ALLOC_CTL_OP_READ_LIMIT 2
+#define CBQRI_CC_ALLOC_CTL_OP_FLUSH_RCID 3
+#define CBQRI_CC_ALLOC_CTL_STATUS_SUCCESS 1
+
+#define CBQRI_BC_MON_CTL_OP_CONFIG_EVENT 1
+#define CBQRI_BC_MON_CTL_OP_READ_COUNTER 2
+#define CBQRI_BC_MON_CTL_STATUS_SUCCESS 1
+
+#define CBQRI_BC_ALLOC_CTL_OP_CONFIG_LIMIT 1
+#define CBQRI_BC_ALLOC_CTL_OP_READ_LIMIT 2
+#define CBQRI_BC_ALLOC_CTL_STATUS_SUCCESS 1
+
+/* Capacity Controller hardware capabilities */
+struct riscv_cbqri_capacity_caps {
+ u16 ncblks; /* number of capacity blocks */
+ u16 cache_level;
+ u32 blk_size;
+
+ bool supports_alloc_at_data;
+ bool supports_alloc_at_code;
+
+ bool supports_alloc_op_config_limit;
+ bool supports_alloc_op_read_limit;
+ bool supports_alloc_op_flush_rcid;
+
+ bool supports_mon_at_data;
+ bool supports_mon_at_code;
+
+ bool supports_mon_op_config_event;
+ bool supports_mon_op_read_counter;
+
+ bool supports_mon_evt_id_none;
+ bool supports_mon_evt_id_occupancy;
+};
+
+/* Bandwidth Controller hardware capabilities */
+struct riscv_cbqri_bandwidth_caps {
+ u16 nbwblks; /* number of bandwidth blocks */
+ u16 mrbwb; /* max reserved bw blocks */
+
+ bool supports_alloc_at_data;
+ bool supports_alloc_at_code;
+
+ bool supports_alloc_op_config_limit;
+ bool supports_alloc_op_read_limit;
+
+ bool supports_mon_at_data;
+ bool supports_mon_at_code;
+
+ bool supports_mon_op_config_event;
+ bool supports_mon_op_read_counter;
+
+ bool supports_mon_evt_id_none;
+ bool supports_mon_evt_id_rdwr_count;
+ bool supports_mon_evt_id_rdonly_count;
+ bool supports_mon_evt_id_wronly_count;
+};
+
+struct cbqri_controller {
+ struct cbqri_controller_info *ctrl_info;
+ void __iomem *base;
+
+ int ver_major;
+ int ver_minor;
+
+ struct riscv_cbqri_bandwidth_caps bc;
+ struct riscv_cbqri_capacity_caps cc;
+
+ bool alloc_capable;
+ bool mon_capable;
+};
+
+#endif /* _ASM_RISCV_QOS_INTERNAL_H */
--
2.43.0
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