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dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=ZRprI8SW; spf=pass (imf24.hostedemail.com: domain of bhe@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=bhe@redhat.com; dmarc=pass (policy=none) header.from=redhat.com X-Stat-Signature: mb1ztrtjsfjj7ij7itxrmcnb39tqkcbh X-Rspamd-Queue-Id: 5BE4E180031 X-Rspamd-Server: rspam09 X-Rspam-User: X-HE-Tag: 1659364881-627047 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: Add hooks ioremap_allowed() and iounmap_allowed() for operisc's special operation when ioremap() and iounmap. Signed-off-by: Baoquan He Cc: Jonas Bonn Cc: Stefan Kristiansson Cc: Stafford Horne Cc: openrisc@lists.librecores.org --- arch/openrisc/Kconfig | 1 + arch/openrisc/include/asm/io.h | 16 ++++++++--- arch/openrisc/mm/ioremap.c | 49 +++++++++++----------------------- 3 files changed, 28 insertions(+), 38 deletions(-) diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index e814df4c483c..77505f2a2767 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -21,6 +21,7 @@ config OPENRISC select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_IOMAP + select GENERIC_IOREMAP select GENERIC_CPU_DEVICES select HAVE_UID16 select GENERIC_ATOMIC64 diff --git a/arch/openrisc/include/asm/io.h b/arch/openrisc/include/asm/io.h index c298061c70a7..8948df501464 100644 --- a/arch/openrisc/include/asm/io.h +++ b/arch/openrisc/include/asm/io.h @@ -15,6 +15,8 @@ #define __ASM_OPENRISC_IO_H #include +#include +#include /* * PCI: can we really do 0 here if we have no port IO? @@ -27,11 +29,17 @@ #define PIO_OFFSET 0 #define PIO_MASK 0 -#define ioremap ioremap -void __iomem *ioremap(phys_addr_t offset, unsigned long size); +/* + * I/O memory mapping functions. + */ +void __iomem * +ioremap_allowed(phys_addr_t *paddr, size_t size, unsigned long *prot_val); +#define ioremap_allowed ioremap_allowed + +int iounmap_allowed(void *addr); +#define iounmap_allowed iounmap_allowed -#define iounmap iounmap -extern void iounmap(void __iomem *addr); +#define _PAGE_IOREMAP (pgprot_val(PAGE_KERNEL) | _PAGE_CI) #include diff --git a/arch/openrisc/mm/ioremap.c b/arch/openrisc/mm/ioremap.c index daae13a76743..d30b6cc65548 100644 --- a/arch/openrisc/mm/ioremap.c +++ b/arch/openrisc/mm/ioremap.c @@ -24,26 +24,18 @@ extern int mem_init_done; static unsigned int fixmaps_used __initdata; -/* - * Remap an arbitrary physical address space into the kernel virtual - * address space. Needed when the kernel wants to access high addresses - * directly. - * - * 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 *__ref ioremap(phys_addr_t addr, unsigned long size) +void __iomem * +ioremap_allowed(phys_addr_t *paddr, size_t size, unsigned long *prot_val) { phys_addr_t p; unsigned long v; unsigned long offset, last_addr; - struct vm_struct *area = NULL; + int ret = -EINVAL; /* Don't allow wraparound or zero size */ last_addr = addr + size - 1; if (!size || last_addr < addr) - return NULL; + return IOMEM_ERR_PTR(ret); /* * Mappings have to be page-aligned @@ -52,32 +44,24 @@ void __iomem *__ref ioremap(phys_addr_t addr, unsigned long size) p = addr & PAGE_MASK; size = PAGE_ALIGN(last_addr + 1) - p; - if (likely(mem_init_done)) { - area = get_vm_area(size, VM_IOREMAP); - if (!area) - return NULL; - v = (unsigned long)area->addr; - } else { + if (unlikely(!mem_init_done)) { if ((fixmaps_used + (size >> PAGE_SHIFT)) > FIX_N_IOREMAPS) - return NULL; + return IOMEM_ERR_PTR(ret); v = fix_to_virt(FIX_IOREMAP_BEGIN + fixmaps_used); fixmaps_used += (size >> PAGE_SHIFT); - } - if (ioremap_page_range(v, v + size, p, - __pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_CI))) { - if (likely(mem_init_done)) - vfree(area->addr); - else + if (ioremap_page_range(v, v + size, p, __pgprot(*prot_val))) { fixmaps_used -= (size >> PAGE_SHIFT); - return NULL; + return IOMEM_ERR_PTR(ret); + } + + return (void __iomem *)(offset + (char *)v); } - return (void __iomem *)(offset + (char *)v); + return NULL; } -EXPORT_SYMBOL(ioremap); -void iounmap(void __iomem *addr) +int iounmap_allowed(void __iomem *addr) { /* If the page is from the fixmap pool then we just clear out * the fixmap mapping. @@ -97,13 +81,10 @@ void iounmap(void __iomem *addr) * ii) invalid accesses to the freed areas aren't made */ flush_tlb_all(); - return; + return -EINVAL; } - - return vfree((void *)(PAGE_MASK & (unsigned long)addr)); + return 0; } -EXPORT_SYMBOL(iounmap); - /** * OK, this one's a bit tricky... ioremap can get called before memory is * initialized (early serial console does this) and will want to alloc a page