[5/5] MIPS: Loongson64: Use shared IOCSR header

Message ID	20240907-iocsr-v1-5-0c99b3334444@flygoat.com (mailing list archive)
State	New, archived
Headers	show Received: from fhigh3-smtp.messagingengine.com (fhigh3-smtp.messagingengine.com [103.168.172.154]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB29815C149; Sat, 7 Sep 2024 10:17:17 +0000 (UTC) Feedback-ID: ifd894703:Fastmail From: Jiaxun Yang <jiaxun.yang@flygoat.com> Date: Sat, 07 Sep 2024 11:17:07 +0100 Subject: [PATCH 5/5] MIPS: Loongson64: Use shared IOCSR header Precedence: bulk MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20240907-iocsr-v1-5-0c99b3334444@flygoat.com> References: <20240907-iocsr-v1-0-0c99b3334444@flygoat.com> In-Reply-To: <20240907-iocsr-v1-0-0c99b3334444@flygoat.com> To: Huacai Chen <chenhuacai@kernel.org>, WANG Xuerui <kernel@xen0n.name>, "Rafael J. Wysocki" <rafael@kernel.org>, Viresh Kumar <viresh.kumar@linaro.org>, Thomas Gleixner <tglx@linutronix.de>, Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-mips@vger.kernel.org, kvm@vger.kernel.org, Jiaxun Yang <jiaxun.yang@flygoat.com>
Series	LoongArch, MIPS: Unify Loongson IOCSR handling \| expand [0/5] LoongArch, MIPS: Unify Loongson IOCSR handling [1/5] LoongArch: Rename cpu_has_csr as cpu_has_iocsr [2/5] LoongArch: Probe more CPU features from CPUCFG [3/5] LoongArch: cpu-probe: Move IOCSR probing out of cpu_probe_common [4/5] LoongArch: Extract IOCSR definitions to standalone header [5/5] MIPS: Loongson64: Use shared IOCSR header

diff --git a/arch/mips/include/asm/mach-loongson64/loongson_regs.h b/arch/mips/include/asm/mach-loongson64/loongson_regs.h index fec767507604..d8af16796dbe 100644 --- a/arch/mips/include/asm/mach-loongson64/loongson_regs.h +++ b/arch/mips/include/asm/mach-loongson64/loongson_regs.h @@ -5,12 +5,13 @@ #ifndef _LOONGSON_REGS_H_ #define _LOONGSON_REGS_H_ -#include <linux/types.h> #include <linux/bits.h> +#include <linux/types.h> #include <asm/mipsregs.h> #include <asm/cpu.h> +#ifndef __ASSEMBLY__ static inline bool cpu_has_cfg(void) { return ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64G); @@ -33,6 +34,7 @@ static inline u32 read_cpucfg(u32 reg) ); return __res; } +#endif /* Bit Domains for CFG registers */ #define LOONGSON_CFG0 0x0 @@ -131,6 +133,7 @@ static inline u32 read_cpucfg(u32 reg) #define LOONGSON_CFG7_GCCAEQRP BIT(0) #define LOONGSON_CFG7_UCAWINP BIT(1) +#ifndef __ASSEMBLY__ static inline bool cpu_has_csr(void) { if (cpu_has_cfg()) @@ -139,7 +142,10 @@ static inline bool cpu_has_csr(void) return false; } -static inline u32 csr_readl(u32 reg) +#define cpu_has_iocsr() cpu_has_csr() + +/* For MIPS/Loongson IOCSR and Core CSR are accessed same way */ +static inline u32 csr_read32(u32 reg) { u32 __res; @@ -158,7 +164,7 @@ static inline u32 csr_readl(u32 reg) return __res; } -static inline u64 csr_readq(u32 reg) +static inline u64 csr_read64(u32 reg) { u64 __res; @@ -177,7 +183,7 @@ static inline u64 csr_readq(u32 reg) return __res; } -static inline void csr_writel(u32 val, u32 reg) +static inline void csr_write32(u32 val, u32 reg) { /* WRCSR reg, val */ __asm__ __volatile__( @@ -193,7 +199,7 @@ static inline void csr_writel(u32 val, u32 reg) ); } -static inline void csr_writeq(u64 val, u32 reg) +static inline void csr_write64(u64 val, u32 reg) { /* DWRCSR reg, val */ __asm__ __volatile__( @@ -209,43 +215,10 @@ static inline void csr_writeq(u64 val, u32 reg) ); } -/* Public CSR Register can also be accessed with regular addresses */ -#define CSR_PUBLIC_MMIO_BASE 0x1fe00000 - -#define MMIO_CSR(x) (void *)TO_UNCAC(CSR_PUBLIC_MMIO_BASE + x) - -#define LOONGSON_CSR_FEATURES 0x8 -#define LOONGSON_CSRF_TEMP BIT(0) -#define LOONGSON_CSRF_NODECNT BIT(1) -#define LOONGSON_CSRF_MSI BIT(2) -#define LOONGSON_CSRF_EXTIOI BIT(3) -#define LOONGSON_CSRF_IPI BIT(4) -#define LOONGSON_CSRF_FREQ BIT(5) - -#define LOONGSON_CSR_VENDOR 0x10 /* Vendor name string, should be "Loongson" */ -#define LOONGSON_CSR_CPUNAME 0x20 /* Processor name string */ -#define LOONGSON_CSR_NODECNT 0x408 -#define LOONGSON_CSR_CPUTEMP 0x428 - -/* PerCore CSR, only accessible by local cores */ -#define LOONGSON_CSR_IPI_STATUS 0x1000 -#define LOONGSON_CSR_IPI_EN 0x1004 -#define LOONGSON_CSR_IPI_SET 0x1008 -#define LOONGSON_CSR_IPI_CLEAR 0x100c -#define LOONGSON_CSR_IPI_SEND 0x1040 -#define CSR_IPI_SEND_IP_SHIFT 0 -#define CSR_IPI_SEND_CPU_SHIFT 16 -#define CSR_IPI_SEND_BLOCK BIT(31) - -#define LOONGSON_CSR_MAIL_BUF0 0x1020 -#define LOONGSON_CSR_MAIL_SEND 0x1048 -#define CSR_MAIL_SEND_BLOCK BIT_ULL(31) -#define CSR_MAIL_SEND_BOX_LOW(box) (box << 1) -#define CSR_MAIL_SEND_BOX_HIGH(box) ((box << 1) + 1) -#define CSR_MAIL_SEND_BOX_SHIFT 2 -#define CSR_MAIL_SEND_CPU_SHIFT 16 -#define CSR_MAIL_SEND_BUF_SHIFT 32 -#define CSR_MAIL_SEND_H32_MASK 0xFFFFFFFF00000000ULL +#define iocsr_read32(reg) csr_read32(reg) +#define iocsr_read64(reg) csr_read64(reg) +#define iocsr_write32(val, reg) csr_write32(val, reg) +#define iocsr_write64(val, reg) csr_write64(val, reg) static inline u64 drdtime(void) { @@ -264,5 +237,6 @@ static inline u64 drdtime(void) ); return val; } +#endif #endif diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c index 99d5a71e4300..4964c1922b23 100644 --- a/arch/mips/kvm/vz.c +++ b/arch/mips/kvm/vz.c @@ -2977,7 +2977,7 @@ static int kvm_vz_hardware_enable(void) #ifdef CONFIG_CPU_LOONGSON64 /* Control guest CCA attribute */ if (cpu_has_csr()) - csr_writel(csr_readl(0xffffffec) | 0x1, 0xffffffec); + csr_write32(csr_read32(0xffffffec) | 0x1, 0xffffffec); #endif return 0; diff --git a/arch/mips/loongson64/smp.c b/arch/mips/loongson64/smp.c index 147acd972a07..0cf03377edf0 100644 --- a/arch/mips/loongson64/smp.c +++ b/arch/mips/loongson64/smp.c @@ -7,6 +7,7 @@ #include <irq.h> #include <linux/init.h> #include <linux/cpu.h> +#include <linux/loongson/iocsr.h> #include <linux/sched.h> #include <linux/sched/hotplug.h> #include <linux/sched/task_stack.h> @@ -19,7 +20,6 @@ #include <asm/tlbflush.h> #include <asm/cacheflush.h> #include <loongson.h> -#include <loongson_regs.h> #include <workarounds.h> #include "smp.h" @@ -45,19 +45,19 @@ static void csr_mail_send(uint64_t data, int cpu, int mailbox) { uint64_t val; - /* send high 32 bits */ - val = CSR_MAIL_SEND_BLOCK; - val |= (CSR_MAIL_SEND_BOX_HIGH(mailbox) << CSR_MAIL_SEND_BOX_SHIFT); - val |= (cpu << CSR_MAIL_SEND_CPU_SHIFT); - val |= (data & CSR_MAIL_SEND_H32_MASK); - csr_writeq(val, LOONGSON_CSR_MAIL_SEND); - - /* send low 32 bits */ - val = CSR_MAIL_SEND_BLOCK; - val |= (CSR_MAIL_SEND_BOX_LOW(mailbox) << CSR_MAIL_SEND_BOX_SHIFT); - val |= (cpu << CSR_MAIL_SEND_CPU_SHIFT); - val |= (data << CSR_MAIL_SEND_BUF_SHIFT); - csr_writeq(val, LOONGSON_CSR_MAIL_SEND); + /* Send high 32 bits */ + val = IOCSR_MBUF_SEND_BLOCKING; + val |= (IOCSR_MBUF_SEND_BOX_HI(mailbox) << IOCSR_MBUF_SEND_BOX_SHIFT); + val |= (cpu << IOCSR_MBUF_SEND_CPU_SHIFT); + val |= (data & IOCSR_MBUF_SEND_H32_MASK); + iocsr_write64(val, LOONGSON_IOCSR_MBUF_SEND); + + /* Send low 32 bits */ + val = IOCSR_MBUF_SEND_BLOCKING; + val |= (IOCSR_MBUF_SEND_BOX_LO(mailbox) << IOCSR_MBUF_SEND_BOX_SHIFT); + val |= (cpu << IOCSR_MBUF_SEND_CPU_SHIFT); + val |= (data << IOCSR_MBUF_SEND_BUF_SHIFT); + iocsr_write64(val, LOONGSON_IOCSR_MBUF_SEND); }; static u32 csr_ipi_read_clear(int cpu) @@ -65,9 +65,9 @@ static u32 csr_ipi_read_clear(int cpu) u32 action; /* Load the ipi register to figure out what we're supposed to do */ - action = csr_readl(LOONGSON_CSR_IPI_STATUS); + action = iocsr_read32(LOONGSON_IOCSR_IPI_STATUS); /* Clear the ipi register to clear the interrupt */ - csr_writel(action, LOONGSON_CSR_IPI_CLEAR); + iocsr_write32(action, LOONGSON_IOCSR_IPI_CLEAR); return action; } @@ -77,22 +77,22 @@ static void csr_ipi_write_action(int cpu, u32 action) unsigned int irq = 0; while ((irq = ffs(action))) { - uint32_t val = CSR_IPI_SEND_BLOCK; + uint32_t val = IOCSR_IPI_SEND_BLOCKING; val |= (irq - 1); - val |= (cpu << CSR_IPI_SEND_CPU_SHIFT); - csr_writel(val, LOONGSON_CSR_IPI_SEND); + val |= (cpu << IOCSR_IPI_SEND_CPU_SHIFT); + iocsr_write32(val, LOONGSON_IOCSR_IPI_SEND); action &= ~BIT(irq - 1); } } static void csr_ipi_write_enable(int cpu) { - csr_writel(0xffffffff, LOONGSON_CSR_IPI_EN); + iocsr_write32(0xffffffff, LOONGSON_IOCSR_IPI_EN); } static void csr_ipi_clear_buf(int cpu) { - csr_writeq(0, LOONGSON_CSR_MAIL_BUF0); + iocsr_write64(0, LOONGSON_IOCSR_MBUF0); } static void csr_ipi_write_buf(int cpu, struct task_struct *idle) @@ -169,7 +169,7 @@ static void legacy_ipi_write_buf(int cpu, struct task_struct *idle) static void csr_ipi_probe(void) { - if (cpu_has_csr() && csr_readl(LOONGSON_CSR_FEATURES) & LOONGSON_CSRF_IPI) { + if (cpu_has_iocsr() && iocsr_read32(LOONGSON_IOCSR_FEATURES) & IOCSRF_CSRIPI) { ipi_read_clear = csr_ipi_read_clear; ipi_write_action = csr_ipi_write_action; ipi_write_enable = csr_ipi_write_enable; diff --git a/drivers/platform/mips/cpu_hwmon.c b/drivers/platform/mips/cpu_hwmon.c index 2ac2f31090f9..9b0b39a39d13 100644 --- a/drivers/platform/mips/cpu_hwmon.c +++ b/drivers/platform/mips/cpu_hwmon.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only #include <linux/err.h> +#include <linux/loongson/iocsr.h> #include <linux/module.h> #include <linux/reboot.h> #include <linux/jiffies.h> @@ -9,7 +10,6 @@ #include <loongson.h> #include <boot_param.h> #include <loongson_hwmon.h> -#include <loongson_regs.h> static int csr_temp_enable; @@ -24,7 +24,7 @@ int loongson3_cpu_temp(int cpu) u32 reg, prid_rev; if (csr_temp_enable) { - reg = (csr_readl(LOONGSON_CSR_CPUTEMP) & 0xff); + reg = (iocsr_read32(LOONGSON_IOCSR_CPUTEMP) & 0xff); goto out; } @@ -136,8 +136,7 @@ static int __init loongson_hwmon_init(void) pr_info("Loongson Hwmon Enter...\n"); if (cpu_has_csr()) - csr_temp_enable = csr_readl(LOONGSON_CSR_FEATURES) & - LOONGSON_CSRF_TEMP; + csr_temp_enable = iocsr_read32(LOONGSON_IOCSR_FEATURES) & IOCSRF_TEMP; if (!csr_temp_enable && !loongson_chiptemp[0]) return -ENODEV; diff --git a/include/linux/loongson/iocsr.h b/include/linux/loongson/iocsr.h index 6654a904bcbe..15e70e6e132e 100644 --- a/include/linux/loongson/iocsr.h +++ b/include/linux/loongson/iocsr.h @@ -10,9 +10,12 @@ #include <linux/bits.h> #include <linux/types.h> -#ifdef CONFIG_LOONGARCH +#if defined(CONFIG_LOONGARCH) #include <asm/loongarch.h> #endif +#if defined(CONFIG_MIPS) && defined(CONFIG_MACH_LOONGSON64) +#include <loongson_regs.h> +#endif #define LOONGSON_IOCSR_FEATURES 0x8 #define IOCSRF_TEMP BIT_ULL(0)

[5/5] MIPS: Loongson64: Use shared IOCSR header

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