From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7741C28D13 for ; Sat, 20 Aug 2022 00:32:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245257AbiHTAci (ORCPT ); Fri, 19 Aug 2022 20:32:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37344 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245187AbiHTAc2 (ORCPT ); Fri, 19 Aug 2022 20:32:28 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47E1BEF9E3 for ; Fri, 19 Aug 2022 17:32:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1660955546; 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=5SHN8uljMwgOES67u9nTa1xL6WhEjv8MuhsMkmhS9fE=; b=hV/pu67XAiIaqfQKERM1PT+xke3238CeYqayN9Qni9a2tDvhmmHDvgy3HOKP4NrUPeC3mU AW3KdeVPefeEsH0pHLKqtM3/Zy9h7gdi9NmiEdL0PPyJM0HudcM2uXpRpsgOjDSNPF07JG 5RKjgc5qd5WujIwPQal/f4hYFIha5sk= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-608-hpYxoUSSMG6Qw-fSYp5coA-1; Fri, 19 Aug 2022 20:32:22 -0400 X-MC-Unique: hpYxoUSSMG6Qw-fSYp5coA-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 37F51185A79C; Sat, 20 Aug 2022 00:32:22 +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 14E644010E3C; Sat, 20 Aug 2022 00:32:15 +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 , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , linux-s390@vger.kernel.org Subject: [PATCH v2 09/11] s390: mm: Convert to GENERIC_IOREMAP Date: Sat, 20 Aug 2022 08:31:23 +0800 Message-Id: <20220820003125.353570-10-bhe@redhat.com> In-Reply-To: <20220820003125.353570-1-bhe@redhat.com> References: <20220820003125.353570-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add hooks arch_ioremap() and arch_iounmap() for s390's special operation when ioremap() and iounmap(), then ioremap_[wc|wt]() are converted to use ioremap_prot() from GENERIC_IOREMAP. Signed-off-by: Baoquan He Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Sven Schnelle Cc: linux-s390@vger.kernel.org --- arch/s390/Kconfig | 1 + arch/s390/include/asm/io.h | 26 +++++++++++------ arch/s390/pci/pci.c | 60 +++++--------------------------------- 3 files changed, 26 insertions(+), 61 deletions(-) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 318fce77601d..c59e1b25f59d 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -135,6 +135,7 @@ config S390 select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL select GENERIC_VDSO_TIME_NS + select GENERIC_IOREMAP select HAVE_ALIGNED_STRUCT_PAGE if SLUB select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_JUMP_LABEL diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h index e3882b012bfa..f837e20b7bbd 100644 --- a/arch/s390/include/asm/io.h +++ b/arch/s390/include/asm/io.h @@ -22,11 +22,23 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr); #define IO_SPACE_LIMIT 0 -void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot); -void __iomem *ioremap(phys_addr_t addr, size_t size); -void __iomem *ioremap_wc(phys_addr_t addr, size_t size); -void __iomem *ioremap_wt(phys_addr_t addr, size_t size); -void iounmap(volatile void __iomem *addr); + +/* + * 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 + +#define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL) + +#define ioremap_wc(addr, size) \ + ioremap_prot((addr), (size), pgprot_val(pgprot_writecombine(PAGE_KERNEL))) +#define ioremap_wt(addr, size) \ + ioremap_prot((addr), (size), pgprot_val(pgprot_writethrough(PAGE_KERNEL))) static inline void __iomem *ioport_map(unsigned long port, unsigned int nr) { @@ -51,10 +63,6 @@ static inline void ioport_unmap(void __iomem *p) #define pci_iomap_wc pci_iomap_wc #define pci_iomap_wc_range pci_iomap_wc_range -#define ioremap ioremap -#define ioremap_wt ioremap_wt -#define ioremap_wc ioremap_wc - #define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count) #define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count) #define memset_io(dst, val, count) zpci_memset_io(dst, val, count) diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 73cdc5539384..984cad9cd5a1 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -244,64 +244,20 @@ void __iowrite64_copy(void __iomem *to, const void *from, size_t count) zpci_memcpy_toio(to, from, count); } -static void __iomem *__ioremap(phys_addr_t addr, size_t size, pgprot_t prot) +void __iomem * +arch_ioremap(phys_addr_t *paddr, size_t size, unsigned long *prot_val) { - unsigned long offset, vaddr; - struct vm_struct *area; - phys_addr_t last_addr; - - last_addr = addr + size - 1; - if (!size || last_addr < addr) - return NULL; - if (!static_branch_unlikely(&have_mio)) - return (void __iomem *) addr; - - offset = addr & ~PAGE_MASK; - addr &= PAGE_MASK; - size = PAGE_ALIGN(size + offset); - area = get_vm_area(size, VM_IOREMAP); - if (!area) - return NULL; - - vaddr = (unsigned long) area->addr; - if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) { - free_vm_area(area); - return NULL; - } - return (void __iomem *) ((unsigned long) area->addr + offset); -} - -void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot) -{ - return __ioremap(addr, size, __pgprot(prot)); + return (void __iomem *) *paddr; + return NULL; } -EXPORT_SYMBOL(ioremap_prot); -void __iomem *ioremap(phys_addr_t addr, size_t size) +int arch_iounmap(void __iomem *addr) { - return __ioremap(addr, size, PAGE_KERNEL); -} -EXPORT_SYMBOL(ioremap); - -void __iomem *ioremap_wc(phys_addr_t addr, size_t size) -{ - return __ioremap(addr, size, pgprot_writecombine(PAGE_KERNEL)); -} -EXPORT_SYMBOL(ioremap_wc); - -void __iomem *ioremap_wt(phys_addr_t addr, size_t size) -{ - return __ioremap(addr, size, pgprot_writethrough(PAGE_KERNEL)); -} -EXPORT_SYMBOL(ioremap_wt); - -void iounmap(volatile void __iomem *addr) -{ - if (static_branch_likely(&have_mio)) - vunmap((__force void *) ((unsigned long) addr & PAGE_MASK)); + if (!static_branch_likely(&have_mio)) + return -EINVAL; + return 0; } -EXPORT_SYMBOL(iounmap); /* Create a virtual mapping cookie for a PCI BAR */ static void __iomem *pci_iomap_range_fh(struct pci_dev *pdev, int bar, -- 2.34.1