linux-kernel - [RFC PATCH 03/21] RISC-V: QoS: define properties of CBQRI controllers

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Date:   Wed, 19 Apr 2023 04:10:53 -0700
From:   Drew Fustini <dfustini@...libre.com>
To:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Ved Shanbhogue <ved@...osinc.com>,
        Kornel Dulęba <mindal@...ihalf.com>,
        Adrien Ricciardi <aricciardi@...libre.com>,
        Nicolas Pitre <npitre@...libre.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Babu Moger <babu.moger@....com>,
        Peter Newman <peternewman@...gle.com>, x86@...nel.org,
        Rob Herring <robh+dt@...nel.org>,
        James Morse <james.morse@....com>
Cc:     Drew Fustini <dfustini@...libre.com>
Subject: [RFC PATCH 03/21] RISC-V: QoS: define properties of CBQRI controllers

Define data structure to represent the CBQRI properties that a driver
for an CBQRI-capable controller would discover during probe.

Each instance of a CBQRI-capable controller is added to a list that the
RISC-V CBQRI resctrl implementation will consume.

Co-developed-by: Adrien Ricciardi <aricciardi@...libre.com>
Signed-off-by: Adrien Ricciardi <aricciardi@...libre.com>
Signed-off-by: Drew Fustini <dfustini@...libre.com>
---
 include/linux/riscv_qos.h | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 include/linux/riscv_qos.h

diff --git a/include/linux/riscv_qos.h b/include/linux/riscv_qos.h
new file mode 100644
index 000000000000..95016810b575
--- /dev/null
+++ b/include/linux/riscv_qos.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __LINUX_RISCV_QOS_H
+#define __LINUX_RISCV_QOS_H
+
+#include <linux/iommu.h>
+#include <linux/types.h>
+
+#include <asm/qos.h>
+
+enum cbqri_controller_type {
+	CBQRI_CONTROLLER_TYPE_CAPACITY,
+	CBQRI_CONTROLLER_TYPE_BANDWIDTH,
+	CBQRI_CONTROLLER_TYPE_UNKNOWN
+};
+
+struct cbqri_controller_info {
+	unsigned long addr;
+	unsigned long size;
+	enum cbqri_controller_type type;
+	u32 rcid_count;
+	u32 mcid_count;
+	struct list_head list;
+
+	struct cache_controller {
+		int cache_level;
+		u32 cache_size; /* in bytes */
+		struct cpumask cpu_mask;
+	} cache;
+};
+
+extern struct list_head cbqri_controllers;
+
+#endif /* __LINUX_RISCV_QOS_H */
-- 
2.34.1