From patchwork Sun Oct 9 10:31:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 13001973 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5572FC4332F for ; Sun, 9 Oct 2022 10:32:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BFB06900003; Sun, 9 Oct 2022 06:32:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BAA446B007B; Sun, 9 Oct 2022 06:32:48 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A2412900003; Sun, 9 Oct 2022 06:32:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 7FA926B0078 for ; Sun, 9 Oct 2022 06:32:48 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 2721140215 for ; Sun, 9 Oct 2022 10:32:48 +0000 (UTC) X-FDA: 80001047616.13.CA4E7A4 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf08.hostedemail.com (Postfix) with ESMTP id BE91F160025 for ; Sun, 9 Oct 2022 10:32:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1665311567; 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=VQufd3pNtB/ZLIfwfMxxAYrIBPOZ+D7pL2gacb9OT3o=; b=QTG7kKcPcNlOoO7nphXZ6RwMgNH8uI+daZWWpqwfymoehXYrq8G4PGs06B5CpvjKp7lOGl VkKfnHLd0J53GcjLS2zcNceBB9KmeLjOq0pt818cw/2RhmoEfaCTN4ZIV19krjBvrOgTvo S9/PacSEtHjoq6nhAttGjr133DrBcj0= 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-16-oye7IdRbOhqO2CIsuNzMQQ-1; Sun, 09 Oct 2022 06:32:39 -0400 X-MC-Unique: oye7IdRbOhqO2CIsuNzMQQ-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 17304380673B; Sun, 9 Oct 2022 10:32:39 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-36.pek2.redhat.com [10.72.12.36]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6C6AF40D298B; Sun, 9 Oct 2022 10:32:32 +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, christophe.leroy@csgroup.eu, schnelle@linux.ibm.com, David.Laight@ACULAB.COM, shorne@gmail.com, bhe@redhat.com, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org Subject: [PATCH v3 08/11] parisc: mm: Convert to GENERIC_IOREMAP Date: Sun, 9 Oct 2022 18:31:11 +0800 Message-Id: <20221009103114.149036-9-bhe@redhat.com> In-Reply-To: <20221009103114.149036-1-bhe@redhat.com> References: <20221009103114.149036-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1665311567; a=rsa-sha256; cv=none; b=lBuh/P0Pk6CBh2jH+qG6+TXdfH8W6PyLZEWZ17nT4LN0ioo2V484fVtWRHcAv+p/odQr/a fjSRCsRbQ4MOhrUonKX3o2+ZmBz/P2YY+EIuuSZY3fmNL+KwSKbFIWQr15X3e/Ggm1hEaO qPxbxj3FY/tQXi/BstJKj8SzAH9k/WM= ARC-Authentication-Results: i=1; imf08.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=QTG7kKcP; spf=pass (imf08.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 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1665311567; h=from:from:sender: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:dkim-signature; bh=VQufd3pNtB/ZLIfwfMxxAYrIBPOZ+D7pL2gacb9OT3o=; b=0Wuq4rG+smCw3g5gK8mSZ7kQO8+ddXOjiUhWwPU0VNN2BoEsHnl7eYu2O3V14zzVsWBvNd zvTu24gPCf+4Bq3Ke/wXNl4XcKb9/qjQkLRXsgWJ6ozF6YxSwElh1BH1Gvfl3Ioq67FL81 b4DZA7LV6E3JzVO5GAsfJoUJULKPN7E= Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=QTG7kKcP; spf=pass (imf08.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: 3abzdfaqbnqt45hcdiom9i4qkw7synkz X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: BE91F160025 X-Rspam-User: X-HE-Tag: 1665311567-928267 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 ioremap_prot() and iounmap() are visible and available to arch. Arch only needs to provide implementation of arch_ioremap() or arch_iounmap() if there's arch specific handling needed in its ioremap() or iounmap(). This change will simplify implementation by removing duplicated codes with generic ioremap() and iounmap(), and has the equivalent functioality as before. For parisc, add hook arch_ioremap() for parisc's special operation when ioremap(), then ioremap_[wc|uc]() are converted to use ioremap_prot() from GENERIC_IOREMAP. Meanwhile, add macro ARCH_HAS_IOREMAP_WC since the added ioremap_wc() will conflict with the one in include/asm-generic/iomap.h, then an compiling error is seen: ./include/asm-generic/iomap.h:97: warning: "ioremap_wc" redefined 97 | #define ioremap_wc ioremap And benefit from the commit 437b6b35362b ("parisc: Use the generic IO helpers"), those macros don't need be added any more. Signed-off-by: Baoquan He Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: linux-parisc@vger.kernel.org --- v2->v3: - Fix compiling error by adding macro definition, ARCH_HAS_IOREMAP_WC. - Benefit from commit 437b6b35362b ("parisc: Use the generic IO helpers"), those tons of port/mem io operation macro definitions are not needed after rebasing to the latest upstream. arch/parisc/Kconfig | 1 + arch/parisc/include/asm/io.h | 19 ++++++++--- arch/parisc/mm/ioremap.c | 65 ++++-------------------------------- 3 files changed, 21 insertions(+), 64 deletions(-) diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index a98940e64243..0ed18e673aba 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..1c54f83d4f78 100644 --- a/arch/parisc/include/asm/io.h +++ b/arch/parisc/include/asm/io.h @@ -2,6 +2,8 @@ #ifndef _ASM_IO_H #define _ASM_IO_H +#define ARCH_HAS_IOREMAP_WC + #include #include @@ -125,12 +127,19 @@ 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 +void __iomem * +arch_ioremap(phys_addr_t *paddr, size_t size, unsigned long *prot_val); +#define arch_ioremap arch_ioremap + +#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..28884757fad0 100644 --- a/arch/parisc/mm/ioremap.c +++ b/arch/parisc/mm/ioremap.c @@ -13,38 +13,19 @@ #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 * +arch_ioremap(phys_addr_t *paddr, size_t size, unsigned long *prot_val) { - void __iomem *addr; - struct vm_struct *area; - unsigned long offset, last_addr; - pgprot_t pgprot; + phys_addr_t phys_addr = *paddr; #ifdef CONFIG_EISA unsigned long end = phys_addr + size - 1; /* Support EISA addresses */ if ((phys_addr >= 0x00080000 && end < 0x000fffff) || (phys_addr >= 0x00500000 && end < 0x03bfffff)) - phys_addr |= F_EXTEND(0xfc000000); + *paddr = 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.. */ @@ -58,43 +39,9 @@ void __iomem *ioremap(unsigned long phys_addr, unsigned long size) for (page = virt_to_page(t_addr); page <= virt_to_page(t_end); page++) { if(!PageReserved(page)) - return NULL; + return IOMEM_ERR_PTR(-EINVAL); } } - 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 NULL; } -EXPORT_SYMBOL(iounmap);