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Bottomley" , linux-parisc@vger.kernel.org Subject: [PATCH v8 14/19] parisc: mm: Convert to GENERIC_IOREMAP Date: Thu, 6 Jul 2023 23:45:15 +0800 Message-Id: <20230706154520.11257-15-bhe@redhat.com> In-Reply-To: <20230706154520.11257-1-bhe@redhat.com> References: <20230706154520.11257-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: A71D0C0023 X-Stat-Signature: 55ja4upzr7btzrju5gnesngajwrfy6gc X-Rspam-User: X-HE-Tag: 1688658472-110862 X-HE-Meta: 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 JjzxFeCO PfJcGbcxAs4eXIic8Hk2Xsk0JrHZ6omTId9ihnLXJiLez9yqa0G4fxtQp39Tl/wPX9KnYA5h3Qv9AJjRzHcj+gcEuGE+kOi010Yr6xrd9rW6qNoHG9A7q49RrfRzQMF8MO/ztxQ15wkPMVoH3lsHj5CDezFn2/JmibUI9gcafPpalR0tcsoKGO//qkUx2KfEMVk/ofGB4Xf74QyJrXjFiwMS5eGwTSY0XShOsVMKGiLac6ituIQ8u9aIIRsowEcBrvwITVZALXzTVkfB4fwHPR0VckL8tSTSFRuExpHgP+fddyucUQeA9HvdilAvPYb7DGnjV/F7OQlOBZEcEfmDnKkiT8A== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 versions if there's arch specific handling in its ioremap_prot(), ioremap() or iounmap(). This change will simplify implementation by removing duplicated code with generic_ioremap_prot() and generic_iounmap(), and has the equivalent functioality as before. Here, add wrapper function ioremap_prot() for parisc's special operation when iounmap(). Signed-off-by: Baoquan He Reviewed-by: Christoph Hellwig Reviewed-by: Mike Rapoport (IBM) Acked-by: Helge Deller Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: linux-parisc@vger.kernel.org --- arch/parisc/Kconfig | 1 + arch/parisc/include/asm/io.h | 15 ++++++--- arch/parisc/mm/ioremap.c | 62 +++--------------------------------- 3 files changed, 15 insertions(+), 63 deletions(-) diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 4cb46d5c64a2..4cda9f0a3277 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -36,6 +36,7 @@ config PARISC select GENERIC_ATOMIC64 if !64BIT select GENERIC_IRQ_PROBE select GENERIC_PCI_IOMAP + select GENERIC_IOREMAP select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_SMP_IDLE_THREAD select GENERIC_ARCH_TOPOLOGY if SMP diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h index c05e781be2f5..366537042465 100644 --- a/arch/parisc/include/asm/io.h +++ b/arch/parisc/include/asm/io.h @@ -125,12 +125,17 @@ static inline void gsc_writeq(unsigned long long val, unsigned long addr) /* * The standard PCI ioremap interfaces */ -void __iomem *ioremap(unsigned long offset, unsigned long size); -#define ioremap_wc ioremap -#define ioremap_uc ioremap -#define pci_iounmap pci_iounmap +#define ioremap_prot ioremap_prot + +#define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \ + _PAGE_ACCESSED | _PAGE_NO_CACHE) -extern void iounmap(const volatile void __iomem *addr); +#define ioremap_wc(addr, size) \ + ioremap_prot((addr), (size), _PAGE_IOREMAP) +#define ioremap_uc(addr, size) \ + ioremap_prot((addr), (size), _PAGE_IOREMAP) + +#define pci_iounmap pci_iounmap void memset_io(volatile void __iomem *addr, unsigned char val, int count); void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); diff --git a/arch/parisc/mm/ioremap.c b/arch/parisc/mm/ioremap.c index 345ff0b66499..fd996472dfe7 100644 --- a/arch/parisc/mm/ioremap.c +++ b/arch/parisc/mm/ioremap.c @@ -13,25 +13,9 @@ #include #include -/* - * Generic mapping function (not visible outside): - */ - -/* - * Remap an arbitrary physical address space into the kernel virtual - * address space. - * - * NOTE! We need to allow non-page-aligned mappings too: we will obviously - * have to convert them into an offset in a page-aligned mapping, but the - * caller shouldn't need to know that small detail. - */ -void __iomem *ioremap(unsigned long phys_addr, unsigned long size) +void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size, + unsigned long prot) { - void __iomem *addr; - struct vm_struct *area; - unsigned long offset, last_addr; - pgprot_t pgprot; - #ifdef CONFIG_EISA unsigned long end = phys_addr + size - 1; /* Support EISA addresses */ @@ -40,11 +24,6 @@ void __iomem *ioremap(unsigned long phys_addr, unsigned long size) phys_addr |= F_EXTEND(0xfc000000); #endif - /* Don't allow wraparound or zero size */ - last_addr = phys_addr + size - 1; - if (!size || last_addr < phys_addr) - return NULL; - /* * Don't allow anybody to remap normal RAM that we're using.. */ @@ -62,39 +41,6 @@ void __iomem *ioremap(unsigned long phys_addr, unsigned long size) } } - pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | - _PAGE_ACCESSED | _PAGE_NO_CACHE); - - /* - * Mappings have to be page-aligned - */ - offset = phys_addr & ~PAGE_MASK; - phys_addr &= PAGE_MASK; - size = PAGE_ALIGN(last_addr + 1) - phys_addr; - - /* - * Ok, go for it.. - */ - area = get_vm_area(size, VM_IOREMAP); - if (!area) - return NULL; - - addr = (void __iomem *) area->addr; - if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size, - phys_addr, pgprot)) { - vunmap(addr); - return NULL; - } - - return (void __iomem *) (offset + (char __iomem *)addr); -} -EXPORT_SYMBOL(ioremap); - -void iounmap(const volatile void __iomem *io_addr) -{ - unsigned long addr = (unsigned long)io_addr & PAGE_MASK; - - if (is_vmalloc_addr((void *)addr)) - vunmap((void *)addr); + return generic_ioremap_prot(phys_addr, size, __pgprot(prot)); } -EXPORT_SYMBOL(iounmap); +EXPORT_SYMBOL(ioremap_prot);