Hi，Ming, On 2016/12/22 16:15, Ming Lei wrote: > Hi Guys, > > On Tue, Nov 8, 2016 at 11:47 AM, zhichang.yuan > <yuanzhichang@xxxxxxxxxxxxx> wrote: >> For arm64, there is no I/O space as other architectural platforms, such as >> X86. Most I/O accesses are achieved based on MMIO. But for some arm64 SoCs, >> such as Hip06, when accessing some legacy ISA devices connected to LPC, those >> known port addresses are used to control the corresponding target devices, for >> example, 0x2f8 is for UART, 0xe4 is for ipmi-bt. It is different from the >> normal MMIO mode in using. >> >> To drive these devices, this patch introduces a method named indirect-IO. >> In this method the in/out pair in arch/arm64/include/asm/io.h will be >> redefined. When upper layer drivers call in/out with those known legacy port >> addresses to access the peripherals, the hooking functions corrresponding to >> those target peripherals will be called. Through this way, those upper layer >> drivers which depend on in/out can run on Hip06 without any changes. >> >> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> >> Cc: Will Deacon <will.deacon@xxxxxxx> >> Signed-off-by: zhichang.yuan <yuanzhichang@xxxxxxxxxxxxx> >> Signed-off-by: Gabriele Paoloni <gabriele.paoloni@xxxxxxxxxx> >> --- >> arch/arm64/Kconfig | 6 +++ >> arch/arm64/include/asm/extio.h | 94 ++++++++++++++++++++++++++++++++++++++++++ >> arch/arm64/include/asm/io.h | 29 +++++++++++++ >> arch/arm64/kernel/Makefile | 1 + >> arch/arm64/kernel/extio.c | 27 ++++++++++++ >> 5 files changed, 157 insertions(+) > > When I applied these three patches against current linus tree and > enable CONFIG_HISILICON_LPC, the following build failure[1] is > triggered when running 'make modules'. > Thanks for your report! This patch has compilation issue on some architectures, sorry for the inconvenience caused by this! The ongoing v6 will solve these issues. I will trace this failure and provide a fix if you can not wait for the next version. Could you send me your .config in private? I don't want to bother all the hacker in the mail-list. Thanks, Zhichang > > Thanks, > Ming > > [1] 'make modules' failure log > > Building modules, stage 2. > MODPOST 2260 modules > ERROR: "inb" [drivers/watchdog/wdt_pci.ko] undefined! > ERROR: "outb" [drivers/watchdog/wdt_pci.ko] undefined! > ERROR: "outb" [drivers/watchdog/pcwd_pci.ko] undefined! > ERROR: "inb" [drivers/watchdog/pcwd_pci.ko] undefined! > ERROR: "outw" [drivers/video/vgastate.ko] undefined! > ERROR: "outb" [drivers/video/vgastate.ko] undefined! > ERROR: "inb" [drivers/video/vgastate.ko] undefined! > ERROR: "outw" [drivers/video/fbdev/vt8623fb.ko] undefined! > ERROR: "inb" [drivers/video/fbdev/vt8623fb.ko] undefined! > ERROR: "outb" [drivers/video/fbdev/vt8623fb.ko] undefined! > ERROR: "outw" [drivers/video/fbdev/tridentfb.ko] undefined! > ERROR: "inb" [drivers/video/fbdev/tridentfb.ko] undefined! > ERROR: "outb" [drivers/video/fbdev/tridentfb.ko] undefined! > ERROR: "inb" [drivers/video/fbdev/tdfxfb.ko] undefined! > ..... > ERROR: "inb" [drivers/ata/pata_cmd64x.ko] undefined! > ERROR: "inb" [drivers/ata/pata_artop.ko] undefined! > scripts/Makefile.modpost:91: recipe for target '__modpost' failed > make[1]: *** [__modpost] Error 1 > Makefile:1196: recipe for target 'modules' failed > make: *** [modules] Error 2 > > >> create mode 100644 arch/arm64/include/asm/extio.h >> create mode 100644 arch/arm64/kernel/extio.c >> >> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig >> index 969ef88..b44070b 100644 >> --- a/arch/arm64/Kconfig >> +++ b/arch/arm64/Kconfig >> @@ -163,6 +163,12 @@ config ARCH_MMAP_RND_COMPAT_BITS_MIN >> config ARCH_MMAP_RND_COMPAT_BITS_MAX >> default 16 >> >> +config ARM64_INDIRECT_PIO >> + bool "access peripherals with legacy I/O port" >> + help >> + Support special accessors for ISA I/O devices. This is needed for >> + SoCs that do not support standard read/write for the ISA range. >> + >> config NO_IOPORT_MAP >> def_bool y if !PCI >> >> diff --git a/arch/arm64/include/asm/extio.h b/arch/arm64/include/asm/extio.h >> new file mode 100644 >> index 0000000..6ae0787 >> --- /dev/null >> +++ b/arch/arm64/include/asm/extio.h >> @@ -0,0 +1,94 @@ >> +/* >> + * Copyright (C) 2016 Hisilicon Limited, All Rights Reserved. >> + * Author: Zhichang Yuan <yuanzhichang@xxxxxxxxxxxxx> >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope that it will be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >> + * GNU General Public License for more details. >> + * >> + * You should have received a copy of the GNU General Public License >> + * along with this program. If not, see <http://www.gnu.org/licenses/>. >> + */ >> + >> +#ifndef __LINUX_EXTIO_H >> +#define __LINUX_EXTIO_H >> + >> +struct extio_ops { >> + unsigned long start;/* inclusive, sys io addr */ >> + unsigned long end;/* inclusive, sys io addr */ >> + >> + u64 (*pfin)(void *devobj, unsigned long ptaddr, size_t dlen); >> + void (*pfout)(void *devobj, unsigned long ptaddr, u32 outval, >> + size_t dlen); >> + u64 (*pfins)(void *devobj, unsigned long ptaddr, void *inbuf, >> + size_t dlen, unsigned int count); >> + void (*pfouts)(void *devobj, unsigned long ptaddr, >> + const void *outbuf, size_t dlen, >> + unsigned int count); >> + void *devpara; >> +}; >> + >> +extern struct extio_ops *arm64_extio_ops; >> + >> +#define DECLARE_EXTIO(bw, type) \ >> +extern type in##bw(unsigned long addr); \ >> +extern void out##bw(type value, unsigned long addr); \ >> +extern void ins##bw(unsigned long addr, void *buffer, unsigned int count);\ >> +extern void outs##bw(unsigned long addr, const void *buffer, unsigned int count); >> + >> +#define BUILD_EXTIO(bw, type) \ >> +type in##bw(unsigned long addr) \ >> +{ \ >> + if (!arm64_extio_ops || arm64_extio_ops->start > addr || \ >> + arm64_extio_ops->end < addr) \ >> + return read##bw(PCI_IOBASE + addr); \ >> + return arm64_extio_ops->pfin ? \ >> + arm64_extio_ops->pfin(arm64_extio_ops->devpara, \ >> + addr, sizeof(type)) : -1; \ >> +} \ >> + \ >> +void out##bw(type value, unsigned long addr) \ >> +{ \ >> + if (!arm64_extio_ops || arm64_extio_ops->start > addr || \ >> + arm64_extio_ops->end < addr) \ >> + write##bw(value, PCI_IOBASE + addr); \ >> + else \ >> + if (arm64_extio_ops->pfout) \ >> + arm64_extio_ops->pfout(arm64_extio_ops->devpara,\ >> + addr, value, sizeof(type)); \ >> +} \ >> + \ >> +void ins##bw(unsigned long addr, void *buffer, unsigned int count) \ >> +{ \ >> + if (!arm64_extio_ops || arm64_extio_ops->start > addr || \ >> + arm64_extio_ops->end < addr) \ >> + reads##bw(PCI_IOBASE + addr, buffer, count); \ >> + else \ >> + if (arm64_extio_ops->pfins) \ >> + arm64_extio_ops->pfins(arm64_extio_ops->devpara,\ >> + addr, buffer, sizeof(type), count); \ >> +} \ >> + \ >> +void outs##bw(unsigned long addr, const void *buffer, unsigned int count) \ >> +{ \ >> + if (!arm64_extio_ops || arm64_extio_ops->start > addr || \ >> + arm64_extio_ops->end < addr) \ >> + writes##bw(PCI_IOBASE + addr, buffer, count); \ >> + else \ >> + if (arm64_extio_ops->pfouts) \ >> + arm64_extio_ops->pfouts(arm64_extio_ops->devpara,\ >> + addr, buffer, sizeof(type), count); \ >> +} >> + >> +static inline void arm64_set_extops(struct extio_ops *ops) >> +{ >> + if (ops) >> + WRITE_ONCE(arm64_extio_ops, ops); >> +} >> + >> +#endif /* __LINUX_EXTIO_H*/ >> diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h >> index 0bba427..136735d 100644 >> --- a/arch/arm64/include/asm/io.h >> +++ b/arch/arm64/include/asm/io.h >> @@ -31,6 +31,7 @@ >> #include <asm/early_ioremap.h> >> #include <asm/alternative.h> >> #include <asm/cpufeature.h> >> +#include <asm/extio.h> >> >> #include <xen/xen.h> >> >> @@ -149,6 +150,34 @@ static inline u64 __raw_readq(const volatile void __iomem *addr) >> #define IO_SPACE_LIMIT (PCI_IO_SIZE - 1) >> #define PCI_IOBASE ((void __iomem *)PCI_IO_START) >> >> + >> +/* >> + * redefine the in(s)b/out(s)b for indirect-IO. >> + */ >> +#ifdef CONFIG_ARM64_INDIRECT_PIO >> +#define inb inb >> +#define outb outb >> +#define insb insb >> +#define outsb outsb >> +/* external declaration */ >> +DECLARE_EXTIO(b, u8) >> + >> +#define inw inw >> +#define outw outw >> +#define insw insw >> +#define outsw outsw >> + >> +DECLARE_EXTIO(w, u16) >> + >> +#define inl inl >> +#define outl outl >> +#define insl insl >> +#define outsl outsl >> + >> +DECLARE_EXTIO(l, u32) >> +#endif >> + >> + >> /* >> * String version of I/O memory access operations. >> */ >> diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile >> index 7d66bba..60e0482 100644 >> --- a/arch/arm64/kernel/Makefile >> +++ b/arch/arm64/kernel/Makefile >> @@ -31,6 +31,7 @@ arm64-obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \ >> sys_compat.o entry32.o >> arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o >> arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o >> +arm64-obj-$(CONFIG_ARM64_INDIRECT_PIO) += extio.o >> arm64-obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o >> arm64-obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o >> arm64-obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o >> diff --git a/arch/arm64/kernel/extio.c b/arch/arm64/kernel/extio.c >> new file mode 100644 >> index 0000000..647b3fa >> --- /dev/null >> +++ b/arch/arm64/kernel/extio.c >> @@ -0,0 +1,27 @@ >> +/* >> + * Copyright (C) 2016 Hisilicon Limited, All Rights Reserved. >> + * Author: Zhichang Yuan <yuanzhichang@xxxxxxxxxxxxx> >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope that it will be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the >> + * GNU General Public License for more details. >> + * >> + * You should have received a copy of the GNU General Public License >> + * along with this program. If not, see <http://www.gnu.org/licenses/>. >> + */ >> + >> +#include <linux/io.h> >> + >> +struct extio_ops *arm64_extio_ops; >> + >> + >> +BUILD_EXTIO(b, u8) >> + >> +BUILD_EXTIO(w, u16) >> + >> +BUILD_EXTIO(l, u32) >> -- >> 1.9.1 >> > > > -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
