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From: Julian Vetter To: Arnd Bergmann , Catalin Marinas , Will Deacon , Guo Ren , Huacai Chen , WANG Xuerui , Andrew Morton Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, loongarch@lists.linux.dev, Yann Sionneau , Julian Vetter Subject: [PATCH v3 1/4] Consolidate __memcpy_{to,from}io and __memset_io into a single lib Date: Tue, 10 Sep 2024 15:43:38 +0200 Message-ID: <20240910134341.2537407-2-jvetter@kalrayinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240910134341.2537407-1-jvetter@kalrayinc.com> References: <20240910134341.2537407-1-jvetter@kalrayinc.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: PA7P264CA0210.FRAP264.PROD.OUTLOOK.COM (2603:10a6:102:36d::16) To PAYP264MB3766.FRAP264.PROD.OUTLOOK.COM (2603:10a6:102:118::6) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAYP264MB3766:EE_|PATP264MB5061:EE_ X-MS-Office365-Filtering-Correlation-Id: d53c8735-bae2-418f-5769-08dcd19e9cbb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|52116014|376014|7416014|1800799024|38350700014; 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charset="utf-8" Various architectures have almost the same implementations for __memcpy_{to,from}io and __memset_io functions. So, consolidate them and introduce a CONFIG_GENERIC_IO_COPY flag to build the given lib/io_copy.c. Reviewed-by: Yann Sionneau Signed-off-by: Julian Vetter Reviewed-by: Catalin Marinas --- lib/Kconfig | 3 ++ lib/Makefile | 1 + lib/io_copy.c | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 114 insertions(+) create mode 100644 lib/io_copy.c diff --git a/lib/Kconfig b/lib/Kconfig index b38849af6f13..741550bc3856 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -70,6 +70,9 @@ source "lib/math/Kconfig" config NO_GENERIC_PCI_IOPORT_MAP bool =20 +config GENERIC_IO_COPY + bool + config GENERIC_IOMAP bool select GENERIC_PCI_IOMAP diff --git a/lib/Makefile b/lib/Makefile index 322bb127b4dc..4f56ad5f9ed6 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -130,6 +130,7 @@ CFLAGS_debug_info.o +=3D $(call cc-option, -femit-struc= t-debug-detailed=3Dany) =20 obj-y +=3D math/ crypto/ =20 +obj-$(CONFIG_GENERIC_IO_COPY) +=3D io_copy.o obj-$(CONFIG_GENERIC_IOMAP) +=3D iomap.o obj-$(CONFIG_HAS_IOMEM) +=3D iomap_copy.o devres.o obj-$(CONFIG_CHECK_SIGNATURE) +=3D check_signature.o diff --git a/lib/io_copy.c b/lib/io_copy.c new file mode 100644 index 000000000000..f44583166325 --- /dev/null +++ b/lib/io_copy.c @@ -0,0 +1,110 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * derived from arch/arm/kernel/io.c + * + * Copyright (C) 2024 Kalray Inc. + * Author(s): Julian Vetter + */ + +#include + +#include +#include +#include + +#define NATIVE_STORE_SIZE (BITS_PER_LONG/8) + +void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t c= ount) +{ + while (count && !IS_ALIGNED((unsigned long)from, NATIVE_STORE_SIZE)) { + *(u8 *)to =3D __raw_readb(from); + from++; + to++; + count--; + } + + while (count >=3D NATIVE_STORE_SIZE) { +#ifdef CONFIG_64BIT + put_unaligned(__raw_readq(from), (uintptr_t *)to); +#else + put_unaligned(__raw_readl(from), (uintptr_t *)to); +#endif + + from +=3D NATIVE_STORE_SIZE; + to +=3D NATIVE_STORE_SIZE; + count -=3D NATIVE_STORE_SIZE; + } + + while (count) { + *(u8 *)to =3D __raw_readb(from); + from++; + to++; + count--; + } +} +EXPORT_SYMBOL(__memcpy_fromio); + +void __memcpy_toio(volatile void __iomem *to, const void *from, size_t cou= nt) +{ + while (count && !IS_ALIGNED((unsigned long)to, NATIVE_STORE_SIZE)) { + __raw_writeb(*(u8 *)from, to); + from++; + to++; + count--; + } + + while (count >=3D NATIVE_STORE_SIZE) { +#ifdef CONFIG_64BIT + __raw_writeq(get_unaligned((uintptr_t *)from), to); +#else + __raw_writel(get_unaligned((uintptr_t *)from), to); +#endif + + from +=3D NATIVE_STORE_SIZE; + to +=3D NATIVE_STORE_SIZE; + count -=3D NATIVE_STORE_SIZE; + } + + while (count) { + __raw_writeb(*(u8 *)from, to); 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charset="utf-8" Use the generic __memcpy_{from,to}io and __memset_io functions on the arm64 processor architecture. Reviewed-by: Yann Sionneau Signed-off-by: Julian Vetter Reviewed-by: Catalin Marinas --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/io.c | 87 ------------------------------------------ 2 files changed, 1 insertion(+), 87 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a2f8ff354ca6..cfb1c729c9a1 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -140,6 +140,7 @@ config ARM64 select GENERIC_CPU_VULNERABILITIES select GENERIC_EARLY_IOREMAP select GENERIC_IDLE_POLL_SETUP + select GENERIC_IO_COPY select GENERIC_IOREMAP select GENERIC_IRQ_IPI select GENERIC_IRQ_PROBE diff --git a/arch/arm64/kernel/io.c b/arch/arm64/kernel/io.c index ef48089fbfe1..fe86ada23c7d 100644 --- a/arch/arm64/kernel/io.c +++ b/arch/arm64/kernel/io.c @@ -9,34 +9,6 @@ #include #include =20 -/* - * Copy data from IO memory space to "real" memory space. - */ -void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t c= ount) -{ - while (count && !IS_ALIGNED((unsigned long)from, 8)) { - *(u8 *)to =3D __raw_readb(from); - from++; - to++; - count--; - } - - while (count >=3D 8) { - *(u64 *)to =3D __raw_readq(from); - from +=3D 8; - to +=3D 8; - count -=3D 8; - } - - while (count) { - *(u8 *)to =3D __raw_readb(from); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_fromio); - /* * This generates a memcpy that works on a from/to address which is aligne= d to * bits. Count is in terms of the number of bits sized quantities to copy.= It @@ -78,62 +50,3 @@ void __iowrite32_copy_full(void __iomem *to, const void = *from, size_t count) dgh(); } EXPORT_SYMBOL(__iowrite32_copy_full); - -/* - * Copy data from "real" memory space to IO memory space. - */ -void __memcpy_toio(volatile void __iomem *to, const void *from, size_t cou= nt) -{ - while (count && !IS_ALIGNED((unsigned long)to, 8)) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } - - while (count >=3D 8) { - __raw_writeq(*(u64 *)from, to); - from +=3D 8; - to +=3D 8; - count -=3D 8; - } - - while (count) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_toio); - -/* - * "memset" on IO memory space. - */ -void __memset_io(volatile void __iomem *dst, int c, size_t count) -{ - u64 qc =3D (u8)c; - - qc |=3D qc << 8; - qc |=3D qc << 16; - qc |=3D qc << 32; - - while (count && !IS_ALIGNED((unsigned long)dst, 8)) { - __raw_writeb(c, dst); - dst++; 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charset="utf-8" Use the generic __memcpy_{from,to}io and __memset_io functions on the csky processor architecture. Reviewed-by: Yann Sionneau Signed-off-by: Julian Vetter --- arch/csky/Kconfig | 1 + arch/csky/kernel/Makefile | 2 +- arch/csky/kernel/io.c | 91 --------------------------------------- 3 files changed, 2 insertions(+), 92 deletions(-) delete mode 100644 arch/csky/kernel/io.c diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 5479707eb5d1..59d4051b2a83 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -48,6 +48,7 @@ config CSKY select DMA_DIRECT_REMAP select IRQ_DOMAIN select DW_APB_TIMER_OF + select GENERIC_IO_COPY select GENERIC_IOREMAP select GENERIC_LIB_ASHLDI3 select GENERIC_LIB_ASHRDI3 diff --git a/arch/csky/kernel/Makefile b/arch/csky/kernel/Makefile index 8a868316b912..de1c3472e8f0 100644 --- a/arch/csky/kernel/Makefile +++ b/arch/csky/kernel/Makefile @@ -2,7 +2,7 @@ extra-y :=3D vmlinux.lds =20 obj-y +=3D head.o entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vd= so/ -obj-y +=3D power.o syscall.o syscall_table.o setup.o io.o +obj-y +=3D power.o syscall.o syscall_table.o setup.o obj-y +=3D process.o cpu-probe.o ptrace.o stacktrace.o obj-y +=3D probes/ =20 diff --git a/arch/csky/kernel/io.c b/arch/csky/kernel/io.c deleted file mode 100644 index 5883f13fa2b1..000000000000 --- a/arch/csky/kernel/io.c +++ /dev/null @@ -1,91 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 - -#include -#include -#include - -/* - * Copy data from IO memory space to "real" memory space. - */ -void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t c= ount) -{ - while (count && !IS_ALIGNED((unsigned long)from, 4)) { - *(u8 *)to =3D __raw_readb(from); - from++; - to++; - count--; - } - - while (count >=3D 4) { - *(u32 *)to =3D __raw_readl(from); - from +=3D 4; - to +=3D 4; - count -=3D 4; - } - - while (count) { - *(u8 *)to =3D __raw_readb(from); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_fromio); - -/* - * Copy data from "real" memory space to IO memory space. - */ -void __memcpy_toio(volatile void __iomem *to, const void *from, size_t cou= nt) -{ - while (count && !IS_ALIGNED((unsigned long)to, 4)) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } - - while (count >=3D 4) { - __raw_writel(*(u32 *)from, to); - from +=3D 4; - to +=3D 4; - count -=3D 4; - } - - while (count) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_toio); - -/* - * "memset" on IO memory space. - */ -void __memset_io(volatile void __iomem *dst, int c, size_t count) -{ - u32 qc =3D (u8)c; - - qc |=3D qc << 8; - qc |=3D qc << 16; - - while (count && !IS_ALIGNED((unsigned long)dst, 4)) { - __raw_writeb(c, dst); 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charset="utf-8" Use the generic __memcpy_{from,to}io and __memset_io functions on the loongarch processor architecture. Reviewed-by: Yann Sionneau Signed-off-by: Julian Vetter --- arch/loongarch/Kconfig | 1 + arch/loongarch/kernel/Makefile | 2 +- arch/loongarch/kernel/io.c | 94 ---------------------------------- 3 files changed, 2 insertions(+), 95 deletions(-) delete mode 100644 arch/loongarch/kernel/io.c diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 70f169210b52..bc97b09efd16 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -84,6 +84,7 @@ config LOONGARCH select GENERIC_CPU_DEVICES select GENERIC_ENTRY select GENERIC_GETTIMEOFDAY + select GENERIC_IO_COPY select GENERIC_IOREMAP if !ARCH_IOREMAP select GENERIC_IRQ_MULTI_HANDLER select GENERIC_IRQ_PROBE diff --git a/arch/loongarch/kernel/Makefile b/arch/loongarch/kernel/Makefile index c9bfeda89e40..9497968ee158 100644 --- a/arch/loongarch/kernel/Makefile +++ b/arch/loongarch/kernel/Makefile @@ -8,7 +8,7 @@ OBJECT_FILES_NON_STANDARD_head.o :=3D y extra-y :=3D vmlinux.lds =20 obj-y +=3D head.o cpu-probe.o cacheinfo.o env.o setup.o entry.o genex.o \ - traps.o irq.o idle.o process.o dma.o mem.o io.o reset.o switch.o \ + traps.o irq.o idle.o process.o dma.o mem.o reset.o switch.o \ elf.o syscall.o signal.o time.o topology.o inst.o ptrace.o vdso.o \ alternative.o unwind.o =20 diff --git a/arch/loongarch/kernel/io.c b/arch/loongarch/kernel/io.c deleted file mode 100644 index cb85bda5a6ad..000000000000 --- a/arch/loongarch/kernel/io.c +++ /dev/null @@ -1,94 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2020-2022 Loongson Technology Corporation Limited - */ -#include -#include -#include - -/* - * Copy data from IO memory space to "real" memory space. - */ -void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t c= ount) -{ - while (count && !IS_ALIGNED((unsigned long)from, 8)) { - *(u8 *)to =3D __raw_readb(from); - from++; - to++; - count--; - } - - while (count >=3D 8) { - *(u64 *)to =3D __raw_readq(from); - from +=3D 8; - to +=3D 8; - count -=3D 8; - } - - while (count) { - *(u8 *)to =3D __raw_readb(from); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_fromio); - -/* - * Copy data from "real" memory space to IO memory space. - */ -void __memcpy_toio(volatile void __iomem *to, const void *from, size_t cou= nt) -{ - while (count && !IS_ALIGNED((unsigned long)to, 8)) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } - - while (count >=3D 8) { - __raw_writeq(*(u64 *)from, to); - from +=3D 8; - to +=3D 8; - count -=3D 8; - } - - while (count) { - __raw_writeb(*(u8 *)from, to); - from++; - to++; - count--; - } -} -EXPORT_SYMBOL(__memcpy_toio); - -/* - * "memset" on IO memory space. - */ -void __memset_io(volatile void __iomem *dst, int c, size_t count) -{ - u64 qc =3D (u8)c; - - qc |=3D qc << 8; - qc |=3D qc << 16; - qc |=3D qc << 32; - - while (count && !IS_ALIGNED((unsigned long)dst, 8)) { - __raw_writeb(c, dst); - dst++; - count--; - } - - while (count >=3D 8) { - __raw_writeq(qc, dst); - dst +=3D 8; - count -=3D 8; - } - - while (count) { - __raw_writeb(c, dst); - dst++; - count--; - } -} -EXPORT_SYMBOL(__memset_io); --=20 2.34.1