From patchwork Mon Aug 1 14:40:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 12933845 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 7BDC1C19F2B for ; Mon, 1 Aug 2022 14:42:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231802AbiHAOmb (ORCPT ); Mon, 1 Aug 2022 10:42:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54424 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233167AbiHAOlq (ORCPT ); Mon, 1 Aug 2022 10:41:46 -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 ESMTP id 24A2C3CBFE for ; Mon, 1 Aug 2022 07:41:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1659364889; 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=7btrmOvCwxUbWnRbGW9HAB+h/F7WiYkudy0+tZC07Ew=; b=HWxLH/jSuwNdsHFx62QAleduAz5A4KH3S4spo6Nr4P71YcurQyLlFY5fH6AAGxHYXVVX/c 5n6orB2w20HL9Q3xYguyp150epnPoPG48mp9A8pgmAhrSVC2gDdmUEitNtgH27y1+X3Q8F zUhZLG/3/a2B7gPzi3h8QHuJoRR1HGw= 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-518-mR9E7DbFOuOXnfVfrRdWoA-1; Mon, 01 Aug 2022 10:41:23 -0400 X-MC-Unique: mR9E7DbFOuOXnfVfrRdWoA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B253780602A; Mon, 1 Aug 2022 14:41:22 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-103.pek2.redhat.com [10.72.12.103]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1B528141510F; Mon, 1 Aug 2022 14:41:17 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@infradead.org, wangkefeng.wang@huawei.com, linux-arm-kernel@lists.infradead.org, Baoquan He , "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org Subject: [PATCH 08/11] parisc: mm: Convert to GENERIC_IOREMAP Date: Mon, 1 Aug 2022 22:40:26 +0800 Message-Id: <20220801144029.57829-9-bhe@redhat.com> In-Reply-To: <20220801144029.57829-1-bhe@redhat.com> References: <20220801144029.57829-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org Add hook ioremap_allowed() for parisc's special operation when ioremap(), then ioremap_[wc|uc]() are converted to use ioremap_prot() from GENERIC_IOREMAP. Signed-off-by: Baoquan He Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: linux-parisc@vger.kernel.org --- arch/parisc/include/asm/io.h | 16 ++++++--- arch/parisc/mm/ioremap.c | 66 ++++-------------------------------- 2 files changed, 18 insertions(+), 64 deletions(-) diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h index 837ddddbac6a..4183f05ca1c4 100644 --- a/arch/parisc/include/asm/io.h +++ b/arch/parisc/include/asm/io.h @@ -125,13 +125,19 @@ static inline void gsc_writeq(unsigned long long val, unsigned long addr) } /* - * The standard PCI ioremap interfaces + * I/O memory mapping functions. */ -void __iomem *ioremap(unsigned long offset, unsigned long size); -#define ioremap_wc ioremap -#define ioremap_uc ioremap +void __iomem * +ioremap_allowed(phys_addr_t *paddr, size_t size, unsigned long prot); +#define ioremap_allowed ioremap_allowed -extern void iounmap(const volatile void __iomem *addr); +#define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \ + _PAGE_ACCESSED | _PAGE_NO_CACHE) + +#define ioremap_wc(addr, size) \ + ioremap_prot((addr), (size), _PAGE_IOREMAP) +#define ioremap_uc(addr, size) \ + ioremap_prot((addr), (size), _PAGE_IOREMAP) static inline unsigned char __raw_readb(const volatile void __iomem *addr) { diff --git a/arch/parisc/mm/ioremap.c b/arch/parisc/mm/ioremap.c index 345ff0b66499..1a6f928e8339 100644 --- a/arch/parisc/mm/ioremap.c +++ b/arch/parisc/mm/ioremap.c @@ -13,38 +13,20 @@ #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_allowed(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; + int ret = -EINVAL; #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 +40,9 @@ 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(ret); } } - 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);