[RFC,04/21] RISC-V: QoS: define CBQRI capacity and bandwidth capabilities

Commit Message

Drew Fustini April 19, 2023, 11:10 a.m. UTC

Define data structures to store the capacity and bandwidth capabilities
that are discovered for a CBQRI-capable controller.

Co-developed-by: Adrien Ricciardi <[e-mail]>
Signed-off-by: Adrien Ricciardi <[e-mail]>
Signed-off-by: Drew Fustini <[e-mail]>
---
 arch/riscv/kernel/qos/internal.h | 130 +++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 arch/riscv/kernel/qos/internal.h

Patch

diff --git a/arch/riscv/kernel/qos/internal.h b/arch/riscv/kernel/qos/internal.h
new file mode 100644
index 000000000000..e07d7f92e206
--- /dev/null
+++ b/arch/riscv/kernel/qos/internal.h
@@ -0,0 +1,130 @@ 
+/* 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    0xFF
+
+#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 */
+/* from qemu/include/hw/riscv/cbqri.h */
+struct riscv_cbqri_capacity_caps {
+	u16 ncblks;
+	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 */
+/* from qemu/include/hw/riscv/cbqri.h */
+struct riscv_cbqri_bandwidth_caps {
+	u16 nbwblks; /* number of bandwidth block */
+	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 */