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https://gitee.com/bianbu-linux/linux-6.6
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0b1f77e74b
Patch series "mm: ioremap: Convert architectures to take GENERIC_IOREMAP way", v8. Motivation and implementation: ============================== Currently, many architecutres have't taken the standard GENERIC_IOREMAP way to implement ioremap_prot(), iounmap(), and ioremap_xx(), but make these functions specifically under each arch's folder. Those cause many duplicated code of ioremap() and iounmap(). In this patchset, firstly introduce generic_ioremap_prot() and generic_iounmap() to extract the generic code for GENERIC_IOREMAP. By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(), generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap() and iounmap() are all visible and available to arch. Arch needs to provide wrapper functions to override the generic version if there's arch specific handling in its corresponding ioremap_prot(), ioremap() or iounmap(). With these changes, duplicated ioremap/iounmap() code uder ARCH-es are removed, and the equivalent functioality is kept as before. Background info: ================ 1) The converting more architectures to take GENERIC_IOREMAP way is suggested by Christoph in below discussion: https://lore.kernel.org/all/Yp7h0Jv6vpgt6xdZ@infradead.org/T/#u 2) In the previous v1 to v3, it's basically further action after arm64 has converted to GENERIC_IOREMAP way in below patchset. It's done by adding hook ioremap_allowed() and iounmap_allowed() in ARCH to add ARCH specific handling the middle of ioremap_prot() and iounmap(). [PATCH v5 0/6] arm64: Cleanup ioremap() and support ioremap_prot() https://lore.kernel.org/all/20220607125027.44946-1-wangkefeng.wang@huawei.com/T/#u Later, during v3 reviewing, Christophe Leroy suggested to introduce generic_ioremap_prot() and generic_iounmap() to generic codes, and ARCH can provide wrapper function ioremap_prot(), ioremap() or iounmap() if needed. Christophe made a RFC patchset as below to specially demonstrate his idea. This is what v4 and now v5 is doing. [RFC PATCH 0/8] mm: ioremap: Convert architectures to take GENERIC_IOREMAP way https://lore.kernel.org/all/cover.1665568707.git.christophe.leroy@csgroup.eu/T/#u Testing: ======== In v8, I only applied this patchset onto the latest linus's tree to build and run on arm64 and s390. This patch (of 19): Let's use '#define ioremap_xx' and "#ifdef ioremap_xx" instead. To remove defined ARCH_HAS_IOREMAP_xx macros in <asm/io.h> of each ARCH, the ARCH's own ioremap_wc|wt|np definition need be above "#include <asm-generic/iomap.h>. Otherwise the redefinition error would be seen during compiling. So the relevant adjustments are made to avoid compiling error: loongarch: - doesn't include <asm-generic/iomap.h>, defining ARCH_HAS_IOREMAP_WC is redundant, so simply remove it. m68k: - selected GENERIC_IOMAP, <asm-generic/iomap.h> has been added in <asm-generic/io.h>, and <asm/kmap.h> is included above <asm-generic/iomap.h>, so simply remove ARCH_HAS_IOREMAP_WT defining. mips: - move "#include <asm-generic/iomap.h>" below ioremap_wc definition in <asm/io.h> powerpc: - remove "#include <asm-generic/iomap.h>" in <asm/io.h> because it's duplicated with the one in <asm-generic/io.h>, let's rely on the latter. x86: - selected GENERIC_IOMAP, remove #include <asm-generic/iomap.h> in the middle of <asm/io.h>. Let's rely on <asm-generic/io.h>. Link: https://lkml.kernel.org/r/20230706154520.11257-2-bhe@redhat.com Signed-off-by: Baoquan He <bhe@redhat.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Helge Deller <deller@gmx.de> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Niklas Schnelle <schnelle@linux.ibm.com> Cc: Stafford Horne <shorne@gmail.com> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Chris Zankel <chris@zankel.net> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Rich Felker <dalias@libc.org> Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
406 lines
13 KiB
C
406 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/include/asm-m68k/io.h
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*
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* 4/1/00 RZ: - rewritten to avoid clashes between ISA/PCI and other
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* IO access
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* - added Q40 support
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* - added skeleton for GG-II and Amiga PCMCIA
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* 2/3/01 RZ: - moved a few more defs into raw_io.h
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*
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* inX/outX should not be used by any driver unless it does
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* ISA access. Other drivers should use function defined in raw_io.h
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* or define its own macros on top of these.
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*
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* inX(),outX() are for ISA I/O
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* isa_readX(),isa_writeX() are for ISA memory
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*/
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#ifndef _M68K_IO_MM_H
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#define _M68K_IO_MM_H
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#ifdef __KERNEL__
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#include <linux/compiler.h>
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#include <asm/raw_io.h>
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#include <asm/virtconvert.h>
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#include <asm/kmap.h>
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#ifdef CONFIG_ATARI
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#define atari_readb raw_inb
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#define atari_writeb raw_outb
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#define atari_inb_p raw_inb
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#define atari_outb_p raw_outb
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#endif
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/*
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* IO/MEM definitions for various ISA bridges
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*/
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#ifdef CONFIG_Q40
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#define q40_isa_io_base 0xff400000
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#define q40_isa_mem_base 0xff800000
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#define Q40_ISA_IO_B(ioaddr) (q40_isa_io_base+1+4*((unsigned long)(ioaddr)))
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#define Q40_ISA_IO_W(ioaddr) (q40_isa_io_base+ 4*((unsigned long)(ioaddr)))
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#define Q40_ISA_MEM_B(madr) (q40_isa_mem_base+1+4*((unsigned long)(madr)))
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#define Q40_ISA_MEM_W(madr) (q40_isa_mem_base+ 4*((unsigned long)(madr)))
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#define MULTI_ISA 0
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#endif /* Q40 */
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#ifdef CONFIG_AMIGA_PCMCIA
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#include <asm/amigayle.h>
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#define AG_ISA_IO_B(ioaddr) ( GAYLE_IO+(ioaddr)+(((ioaddr)&1)*GAYLE_ODD) )
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#define AG_ISA_IO_W(ioaddr) ( GAYLE_IO+(ioaddr) )
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#ifndef MULTI_ISA
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#define MULTI_ISA 0
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#else
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#undef MULTI_ISA
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#define MULTI_ISA 1
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#endif
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#endif /* AMIGA_PCMCIA */
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#ifdef CONFIG_ATARI_ROM_ISA
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#define enec_isa_read_base 0xfffa0000
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#define enec_isa_write_base 0xfffb0000
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#define ENEC_ISA_IO_B(ioaddr) (enec_isa_read_base+((((unsigned long)(ioaddr))&0x7F)<<9))
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#define ENEC_ISA_IO_W(ioaddr) (enec_isa_read_base+((((unsigned long)(ioaddr))&0x7F)<<9))
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#define ENEC_ISA_MEM_B(madr) (enec_isa_read_base+((((unsigned long)(madr))&0x7F)<<9))
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#define ENEC_ISA_MEM_W(madr) (enec_isa_read_base+((((unsigned long)(madr))&0x7F)<<9))
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#ifndef MULTI_ISA
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#define MULTI_ISA 0
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#else
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#undef MULTI_ISA
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#define MULTI_ISA 1
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#endif
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#endif /* ATARI_ROM_ISA */
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#if defined(CONFIG_ISA) || defined(CONFIG_ATARI_ROM_ISA)
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#if MULTI_ISA == 0
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#undef MULTI_ISA
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#endif
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#define ISA_TYPE_Q40 (1)
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#define ISA_TYPE_AG (2)
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#define ISA_TYPE_ENEC (3)
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#if defined(CONFIG_Q40) && !defined(MULTI_ISA)
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#define ISA_TYPE ISA_TYPE_Q40
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#define ISA_SEX 0
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#endif
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#if defined(CONFIG_AMIGA_PCMCIA) && !defined(MULTI_ISA)
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#define ISA_TYPE ISA_TYPE_AG
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#define ISA_SEX 1
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#endif
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#if defined(CONFIG_ATARI_ROM_ISA) && !defined(MULTI_ISA)
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#define ISA_TYPE ISA_TYPE_ENEC
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#define ISA_SEX 0
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#endif
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#ifdef MULTI_ISA
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extern int isa_type;
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extern int isa_sex;
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#define ISA_TYPE isa_type
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#define ISA_SEX isa_sex
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#endif
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/*
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* define inline addr translation functions. Normally only one variant will
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* be compiled in so the case statement will be optimised away
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*/
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static inline u8 __iomem *isa_itb(unsigned long addr)
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{
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switch(ISA_TYPE)
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{
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#ifdef CONFIG_Q40
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case ISA_TYPE_Q40: return (u8 __iomem *)Q40_ISA_IO_B(addr);
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#endif
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#ifdef CONFIG_AMIGA_PCMCIA
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case ISA_TYPE_AG: return (u8 __iomem *)AG_ISA_IO_B(addr);
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#endif
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#ifdef CONFIG_ATARI_ROM_ISA
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case ISA_TYPE_ENEC: return (u8 __iomem *)ENEC_ISA_IO_B(addr);
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#endif
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default: return NULL; /* avoid warnings, just in case */
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}
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}
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static inline u16 __iomem *isa_itw(unsigned long addr)
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{
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switch(ISA_TYPE)
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{
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#ifdef CONFIG_Q40
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case ISA_TYPE_Q40: return (u16 __iomem *)Q40_ISA_IO_W(addr);
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#endif
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#ifdef CONFIG_AMIGA_PCMCIA
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case ISA_TYPE_AG: return (u16 __iomem *)AG_ISA_IO_W(addr);
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#endif
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#ifdef CONFIG_ATARI_ROM_ISA
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case ISA_TYPE_ENEC: return (u16 __iomem *)ENEC_ISA_IO_W(addr);
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#endif
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default: return NULL; /* avoid warnings, just in case */
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}
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}
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static inline u32 __iomem *isa_itl(unsigned long addr)
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{
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switch(ISA_TYPE)
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{
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#ifdef CONFIG_AMIGA_PCMCIA
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case ISA_TYPE_AG: return (u32 __iomem *)AG_ISA_IO_W(addr);
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#endif
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default: return 0; /* avoid warnings, just in case */
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}
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}
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static inline u8 __iomem *isa_mtb(unsigned long addr)
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{
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switch(ISA_TYPE)
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{
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#ifdef CONFIG_Q40
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case ISA_TYPE_Q40: return (u8 __iomem *)Q40_ISA_MEM_B(addr);
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#endif
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#ifdef CONFIG_AMIGA_PCMCIA
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case ISA_TYPE_AG: return (u8 __iomem *)addr;
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#endif
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#ifdef CONFIG_ATARI_ROM_ISA
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case ISA_TYPE_ENEC: return (u8 __iomem *)ENEC_ISA_MEM_B(addr);
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#endif
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default: return NULL; /* avoid warnings, just in case */
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}
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}
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static inline u16 __iomem *isa_mtw(unsigned long addr)
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{
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switch(ISA_TYPE)
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{
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#ifdef CONFIG_Q40
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case ISA_TYPE_Q40: return (u16 __iomem *)Q40_ISA_MEM_W(addr);
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#endif
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#ifdef CONFIG_AMIGA_PCMCIA
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case ISA_TYPE_AG: return (u16 __iomem *)addr;
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#endif
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#ifdef CONFIG_ATARI_ROM_ISA
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case ISA_TYPE_ENEC: return (u16 __iomem *)ENEC_ISA_MEM_W(addr);
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#endif
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default: return NULL; /* avoid warnings, just in case */
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}
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}
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#define isa_inb(port) in_8(isa_itb(port))
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#define isa_inw(port) (ISA_SEX ? in_be16(isa_itw(port)) : in_le16(isa_itw(port)))
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#define isa_inl(port) (ISA_SEX ? in_be32(isa_itl(port)) : in_le32(isa_itl(port)))
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#define isa_outb(val,port) out_8(isa_itb(port),(val))
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#define isa_outw(val,port) (ISA_SEX ? out_be16(isa_itw(port),(val)) : out_le16(isa_itw(port),(val)))
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#define isa_outl(val,port) (ISA_SEX ? out_be32(isa_itl(port),(val)) : out_le32(isa_itl(port),(val)))
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#define isa_readb(p) in_8(isa_mtb((unsigned long)(p)))
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#define isa_readw(p) \
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(ISA_SEX ? in_be16(isa_mtw((unsigned long)(p))) \
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: in_le16(isa_mtw((unsigned long)(p))))
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#define isa_writeb(val,p) out_8(isa_mtb((unsigned long)(p)),(val))
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#define isa_writew(val,p) \
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(ISA_SEX ? out_be16(isa_mtw((unsigned long)(p)),(val)) \
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: out_le16(isa_mtw((unsigned long)(p)),(val)))
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#ifdef CONFIG_ATARI_ROM_ISA
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#define isa_rom_inb(port) rom_in_8(isa_itb(port))
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#define isa_rom_inw(port) \
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(ISA_SEX ? rom_in_be16(isa_itw(port)) \
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: rom_in_le16(isa_itw(port)))
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#define isa_rom_outb(val, port) rom_out_8(isa_itb(port), (val))
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#define isa_rom_outw(val, port) \
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(ISA_SEX ? rom_out_be16(isa_itw(port), (val)) \
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: rom_out_le16(isa_itw(port), (val)))
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#define isa_rom_readb(p) rom_in_8(isa_mtb((unsigned long)(p)))
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#define isa_rom_readw(p) \
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(ISA_SEX ? rom_in_be16(isa_mtw((unsigned long)(p))) \
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: rom_in_le16(isa_mtw((unsigned long)(p))))
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#define isa_rom_readw_swap(p) \
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(ISA_SEX ? rom_in_le16(isa_mtw((unsigned long)(p))) \
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: rom_in_be16(isa_mtw((unsigned long)(p))))
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#define isa_rom_readw_raw(p) rom_in_be16(isa_mtw((unsigned long)(p)))
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#define isa_rom_writeb(val, p) rom_out_8(isa_mtb((unsigned long)(p)), (val))
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#define isa_rom_writew(val, p) \
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(ISA_SEX ? rom_out_be16(isa_mtw((unsigned long)(p)), (val)) \
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: rom_out_le16(isa_mtw((unsigned long)(p)), (val)))
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#define isa_rom_writew_swap(val, p) \
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(ISA_SEX ? rom_out_le16(isa_mtw((unsigned long)(p)), (val)) \
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: rom_out_be16(isa_mtw((unsigned long)(p)), (val)))
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#define isa_rom_writew_raw(val, p) rom_out_be16(isa_mtw((unsigned long)(p)), (val))
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#endif /* CONFIG_ATARI_ROM_ISA */
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static inline void isa_delay(void)
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{
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switch(ISA_TYPE)
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{
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#ifdef CONFIG_Q40
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case ISA_TYPE_Q40: isa_outb(0,0x80); break;
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#endif
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#ifdef CONFIG_AMIGA_PCMCIA
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case ISA_TYPE_AG: break;
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#endif
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#ifdef CONFIG_ATARI_ROM_ISA
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case ISA_TYPE_ENEC: break;
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#endif
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default: break; /* avoid warnings */
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}
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}
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#define isa_inb_p(p) ({u8 v=isa_inb(p);isa_delay();v;})
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#define isa_outb_p(v,p) ({isa_outb((v),(p));isa_delay();})
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#define isa_inw_p(p) ({u16 v=isa_inw(p);isa_delay();v;})
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#define isa_outw_p(v,p) ({isa_outw((v),(p));isa_delay();})
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#define isa_inl_p(p) ({u32 v=isa_inl(p);isa_delay();v;})
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#define isa_outl_p(v,p) ({isa_outl((v),(p));isa_delay();})
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#define isa_insb(port, buf, nr) raw_insb(isa_itb(port), (u8 *)(buf), (nr))
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#define isa_outsb(port, buf, nr) raw_outsb(isa_itb(port), (u8 *)(buf), (nr))
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#define isa_insw(port, buf, nr) \
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(ISA_SEX ? raw_insw(isa_itw(port), (u16 *)(buf), (nr)) : \
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raw_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
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#define isa_outsw(port, buf, nr) \
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(ISA_SEX ? raw_outsw(isa_itw(port), (u16 *)(buf), (nr)) : \
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raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
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#define isa_insl(port, buf, nr) \
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(ISA_SEX ? raw_insl(isa_itl(port), (u32 *)(buf), (nr)) : \
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raw_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))
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#define isa_outsl(port, buf, nr) \
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(ISA_SEX ? raw_outsl(isa_itl(port), (u32 *)(buf), (nr)) : \
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raw_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)<<1))
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#ifdef CONFIG_ATARI_ROM_ISA
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#define isa_rom_inb_p(p) ({ u8 _v = isa_rom_inb(p); isa_delay(); _v; })
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#define isa_rom_inw_p(p) ({ u16 _v = isa_rom_inw(p); isa_delay(); _v; })
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#define isa_rom_outb_p(v, p) ({ isa_rom_outb((v), (p)); isa_delay(); })
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#define isa_rom_outw_p(v, p) ({ isa_rom_outw((v), (p)); isa_delay(); })
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#define isa_rom_insb(port, buf, nr) raw_rom_insb(isa_itb(port), (u8 *)(buf), (nr))
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#define isa_rom_insw(port, buf, nr) \
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(ISA_SEX ? raw_rom_insw(isa_itw(port), (u16 *)(buf), (nr)) : \
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raw_rom_insw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
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#define isa_rom_outsb(port, buf, nr) raw_rom_outsb(isa_itb(port), (u8 *)(buf), (nr))
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#define isa_rom_outsw(port, buf, nr) \
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(ISA_SEX ? raw_rom_outsw(isa_itw(port), (u16 *)(buf), (nr)) : \
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raw_rom_outsw_swapw(isa_itw(port), (u16 *)(buf), (nr)))
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#endif /* CONFIG_ATARI_ROM_ISA */
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#endif /* CONFIG_ISA || CONFIG_ATARI_ROM_ISA */
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#if defined(CONFIG_ISA) && !defined(CONFIG_ATARI_ROM_ISA)
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#define inb isa_inb
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#define inb_p isa_inb_p
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#define outb isa_outb
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#define outb_p isa_outb_p
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#define inw isa_inw
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#define inw_p isa_inw_p
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#define outw isa_outw
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#define outw_p isa_outw_p
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#define inl isa_inl
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#define inl_p isa_inl_p
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#define outl isa_outl
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#define outl_p isa_outl_p
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#define insb isa_insb
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#define insw isa_insw
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#define insl isa_insl
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#define outsb isa_outsb
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#define outsw isa_outsw
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#define outsl isa_outsl
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#define readb isa_readb
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#define readw isa_readw
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#define writeb isa_writeb
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#define writew isa_writew
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#endif /* CONFIG_ISA && !CONFIG_ATARI_ROM_ISA */
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#ifdef CONFIG_ATARI_ROM_ISA
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/*
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* kernel with both ROM port ISA and IDE compiled in, those have
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* conflicting defs for in/out. Simply consider port < 1024
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* ROM port ISA and everything else regular ISA for IDE. read,write defined
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* below.
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*/
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#define inb(port) ((port) < 1024 ? isa_rom_inb(port) : in_8(port))
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#define inb_p(port) ((port) < 1024 ? isa_rom_inb_p(port) : in_8(port))
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#define inw(port) ((port) < 1024 ? isa_rom_inw(port) : in_le16(port))
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#define inw_p(port) ((port) < 1024 ? isa_rom_inw_p(port) : in_le16(port))
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#define inl isa_inl
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#define inl_p isa_inl_p
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#define outb(val, port) ((port) < 1024 ? isa_rom_outb((val), (port)) : out_8((port), (val)))
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#define outb_p(val, port) ((port) < 1024 ? isa_rom_outb_p((val), (port)) : out_8((port), (val)))
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#define outw(val, port) ((port) < 1024 ? isa_rom_outw((val), (port)) : out_le16((port), (val)))
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#define outw_p(val, port) ((port) < 1024 ? isa_rom_outw_p((val), (port)) : out_le16((port), (val)))
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#define outl isa_outl
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#define outl_p isa_outl_p
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#define insb(port, buf, nr) ((port) < 1024 ? isa_rom_insb((port), (buf), (nr)) : isa_insb((port), (buf), (nr)))
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#define insw(port, buf, nr) ((port) < 1024 ? isa_rom_insw((port), (buf), (nr)) : isa_insw((port), (buf), (nr)))
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#define insl isa_insl
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#define outsb(port, buf, nr) ((port) < 1024 ? isa_rom_outsb((port), (buf), (nr)) : isa_outsb((port), (buf), (nr)))
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#define outsw(port, buf, nr) ((port) < 1024 ? isa_rom_outsw((port), (buf), (nr)) : isa_outsw((port), (buf), (nr)))
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#define outsl isa_outsl
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#define readb(addr) in_8(addr)
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#define writeb(val, addr) out_8((addr), (val))
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|
#define readw(addr) in_le16(addr)
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|
#define writew(val, addr) out_le16((addr), (val))
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|
#endif /* CONFIG_ATARI_ROM_ISA */
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#define readl(addr) in_le32(addr)
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|
#define writel(val,addr) out_le32((addr),(val))
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#define readsb(port, buf, nr) raw_insb((port), (u8 *)(buf), (nr))
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#define readsw(port, buf, nr) raw_insw((port), (u16 *)(buf), (nr))
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|
#define readsl(port, buf, nr) raw_insl((port), (u32 *)(buf), (nr))
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|
#define writesb(port, buf, nr) raw_outsb((port), (u8 *)(buf), (nr))
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|
#define writesw(port, buf, nr) raw_outsw((port), (u16 *)(buf), (nr))
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|
#define writesl(port, buf, nr) raw_outsl((port), (u32 *)(buf), (nr))
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|
|
|
#ifndef CONFIG_SUN3
|
|
#define IO_SPACE_LIMIT 0xffff
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|
#else
|
|
#define IO_SPACE_LIMIT 0x0fffffff
|
|
#endif
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|
|
|
#endif /* __KERNEL__ */
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|
|
|
#define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1
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|
|
|
/*
|
|
* Convert a physical pointer to a virtual kernel pointer for /dev/mem
|
|
* access
|
|
*/
|
|
#define xlate_dev_mem_ptr(p) __va(p)
|
|
|
|
#define readb_relaxed(addr) readb(addr)
|
|
#define readw_relaxed(addr) readw(addr)
|
|
#define readl_relaxed(addr) readl(addr)
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|
|
|
#define writeb_relaxed(b, addr) writeb(b, addr)
|
|
#define writew_relaxed(b, addr) writew(b, addr)
|
|
#define writel_relaxed(b, addr) writel(b, addr)
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|
|
|
#endif /* _M68K_IO_MM_H */
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