From patchwork Sat Aug 20 00:31:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 12949427 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8DB83C28D13 for ; Sat, 20 Aug 2022 00:38:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=4fviE8EXFK99apIT/nA/hnrc8on7nDhQxaqbV0FF8HA=; b=F9z7DkKBKon79U AGUf5XICYmQ3BxQt0HpV3YbZVcA1O7gZ4IxUBLsqIr/vb7uHUTZVgcs6Itpukp8RgejK49mgGTM+Q oQdCfn9CAsvWDrbPN1wGWon2Q+TLMdy643kmlfiSDAbdQjUd9BHFi1iD7eX95eKfdvZlxlE0pRdmR C4BtFLGQ3CuiTYqHPwcaOs5Bo/Nizi0oHlotYb5CZ0xq441utVqED7/sLT5em8821y7RBGNS9GBo+ TC13CKBjVItWmxAx32Xl9Xbnrhptb9AaNhlIaXPKI3qqaDjPFUjSfeOzyG62i1hqfDinPb+x7JIU7 6W+tQMBFuggwxs5SZpcg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oPCT5-00Dzs8-AW; Sat, 20 Aug 2022 00:36:03 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oPCPk-00Dx8O-Kv for linux-arm-kernel@lists.infradead.org; Sat, 20 Aug 2022 00:32:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1660955555; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FMjDgiCjdNo3qKQdbhNe2varvevMFaQqgjlmVIuUXJM=; b=iqyVjZRy2MX0qNi/j/lkMHl+veJVbWFNuJqPzyenS5dX+7S/DfooxnnYRY0tFzo8a9+hj7 jGGemGT/WOMvKqnCSa5iqnimeRsjFQHXhShGSxpWrPfagtAmZaqhUWFkYD4+ctZz7q3YKH 7xdojv/khNUP/r+ISi7CJN10+v84JjE= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-120-m2l-eYInOt6faNznRRzA4A-1; Fri, 19 Aug 2022 20:32:34 -0400 X-MC-Unique: m2l-eYInOt6faNznRRzA4A-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id DCEF83804502; Sat, 20 Aug 2022 00:32:33 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-17.pek2.redhat.com [10.72.12.17]) by smtp.corp.redhat.com (Postfix) with ESMTP id D4B164010D2A; Sat, 20 Aug 2022 00:32:28 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@infradead.org, agordeev@linux.ibm.com, wangkefeng.wang@huawei.com, linux-arm-kernel@lists.infradead.org, Baoquan He , Chris Zankel , Max Filippov , linux-xtensa@linux-xtensa.org Subject: [PATCH v2 11/11] xtensa: mm: Convert to GENERIC_IOREMAP Date: Sat, 20 Aug 2022 08:31:25 +0800 Message-Id: <20220820003125.353570-12-bhe@redhat.com> In-Reply-To: <20220820003125.353570-1-bhe@redhat.com> References: <20220820003125.353570-1-bhe@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220819_173236_821444_D307239A X-CRM114-Status: GOOD ( 15.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add hooks arch_ioremap() and arch_iounmap() for xtensa's special operation when ioremap() and iounmap(). Then define and implement its own ioremap() and ioremap_cache(). Signed-off-by: Baoquan He Cc: Chris Zankel Cc: Max Filippov Cc: linux-xtensa@linux-xtensa.org --- arch/xtensa/Kconfig | 1 + arch/xtensa/include/asm/io.h | 39 +++++++++++-------------- arch/xtensa/mm/ioremap.c | 56 +++++++++--------------------------- 3 files changed, 31 insertions(+), 65 deletions(-) diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 12ac277282ba..ee3a638f5458 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -29,6 +29,7 @@ config XTENSA select GENERIC_LIB_UCMPDI2 select GENERIC_PCI_IOMAP select GENERIC_SCHED_CLOCK + select GENERIC_IOREMAP if MMU select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h index a5b707e1c0f4..04dfc0dc936b 100644 --- a/arch/xtensa/include/asm/io.h +++ b/arch/xtensa/include/asm/io.h @@ -16,6 +16,7 @@ #include #include #include +#include #include @@ -23,23 +24,29 @@ #define IO_SPACE_LIMIT ~0 #define PCI_IOBASE ((void __iomem *)XCHAL_KIO_BYPASS_VADDR) -#ifdef CONFIG_MMU - -void __iomem *xtensa_ioremap_nocache(unsigned long addr, unsigned long size); -void __iomem *xtensa_ioremap_cache(unsigned long addr, unsigned long size); -void xtensa_iounmap(volatile void __iomem *addr); - /* - * Return the virtual address for the specified bus memory. + * I/O memory mapping functions. */ +void __iomem * +arch_ioremap(phys_addr_t *paddr, size_t size, unsigned long *prot_val); +#define arch_ioremap arch_ioremap + +int arch_iounmap(void __iomem *addr); +#define arch_iounmap arch_iounmap + +void __iomem *ioremap_prot(phys_addr_t paddr, size_t size, + unsigned long prot); + static inline void __iomem *ioremap(unsigned long offset, unsigned long size) { if (offset >= XCHAL_KIO_PADDR && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_BYPASS_VADDR); else - return xtensa_ioremap_nocache(offset, size); + return ioremap_prot(offset, size, + pgprot_val(pgprot_noncached(PAGE_KERNEL))); } +#define ioremap ioremap static inline void __iomem *ioremap_cache(unsigned long offset, unsigned long size) @@ -48,22 +55,10 @@ static inline void __iomem *ioremap_cache(unsigned long offset, && offset - XCHAL_KIO_PADDR < XCHAL_KIO_SIZE) return (void*)(offset-XCHAL_KIO_PADDR+XCHAL_KIO_CACHED_VADDR); else - return xtensa_ioremap_cache(offset, size); -} -#define ioremap_cache ioremap_cache - -static inline void iounmap(volatile void __iomem *addr) -{ - unsigned long va = (unsigned long) addr; + return ioremap_prot(offset, size, pgprot_val(PAGE_KERNEL)); - if (!(va >= XCHAL_KIO_CACHED_VADDR && - va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) && - !(va >= XCHAL_KIO_BYPASS_VADDR && - va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE)) - xtensa_iounmap(addr); } - -#endif /* CONFIG_MMU */ +#define ioremap_cache ioremap_cache #include diff --git a/arch/xtensa/mm/ioremap.c b/arch/xtensa/mm/ioremap.c index a400188c16b9..0508448d767a 100644 --- a/arch/xtensa/mm/ioremap.c +++ b/arch/xtensa/mm/ioremap.c @@ -6,60 +6,30 @@ */ #include -#include #include #include #include -static void __iomem *xtensa_ioremap(unsigned long paddr, unsigned long size, - pgprot_t prot) +void __iomem * +arch_ioremap(phys_addr_t *paddr, size_t size, unsigned long *prot_val) { - unsigned long offset = paddr & ~PAGE_MASK; - unsigned long pfn = __phys_to_pfn(paddr); - struct vm_struct *area; - unsigned long vaddr; - int err; - - paddr &= PAGE_MASK; + unsigned long phys_addr = *paddr; + unsigned long pfn = __phys_to_pfn(phys_addr); WARN_ON(pfn_valid(pfn)); - size = PAGE_ALIGN(offset + size); - - area = get_vm_area(size, VM_IOREMAP); - if (!area) - return NULL; - - vaddr = (unsigned long)area->addr; - area->phys_addr = paddr; - - err = ioremap_page_range(vaddr, vaddr + size, paddr, prot); - - if (err) { - vunmap((void *)vaddr); - return NULL; - } - - flush_cache_vmap(vaddr, vaddr + size); - return (void __iomem *)(offset + vaddr); + return NULL; } -void __iomem *xtensa_ioremap_nocache(unsigned long addr, unsigned long size) +int arch_iounmap(void __iomem *addr) { - return xtensa_ioremap(addr, size, pgprot_noncached(PAGE_KERNEL)); -} -EXPORT_SYMBOL(xtensa_ioremap_nocache); + unsigned long va = (unsigned long) addr; -void __iomem *xtensa_ioremap_cache(unsigned long addr, unsigned long size) -{ - return xtensa_ioremap(addr, size, PAGE_KERNEL); -} -EXPORT_SYMBOL(xtensa_ioremap_cache); - -void xtensa_iounmap(volatile void __iomem *io_addr) -{ - void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr); + if ((va >= XCHAL_KIO_CACHED_VADDR && + va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) || + (va >= XCHAL_KIO_BYPASS_VADDR && + va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE)) + return -EINVAL; - vunmap(addr); + return 0; } -EXPORT_SYMBOL(xtensa_iounmap);