From patchwork Thu Apr 16 15:00:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 192997 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3164C2BB55 for ; Thu, 16 Apr 2020 15:05:50 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2F758206D9 for ; Thu, 16 Apr 2020 15:05:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="kTENBCwg"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Usb+FvXd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2F758206D9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 9302D167D; Thu, 16 Apr 2020 17:04:58 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 9302D167D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1587049548; bh=Py1t3WtY3Cj6mRD67xr0rn+5WyEdVDntxMuYA9qdaJ4=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=kTENBCwggnR13kxD6SoCbWZAnR9Mmp3ckbBSzWKz9F4WAXzvklkDpozzhzfZ+QMbc SjsDbXV19eXjl+BGqaMkh7DZKcwxbWZ1vuc6Uzq1HLCA5+YU/TDLFAL0lkYuGKaP6y U66SdS/h3U9sf6GGZ0n9daLQLDfvSSZyIbnYl7g0= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 51A83F802DB; Thu, 16 Apr 2020 17:00:49 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 01C20F8016F; Thu, 16 Apr 2020 17:00:41 +0200 (CEST) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id CD3FBF80278 for ; Thu, 16 Apr 2020 17:00:34 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz CD3FBF80278 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Usb+FvXd" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=yyuJrtfVyD3fUEUFSeqLWA3IrF2yJjSqrC/bf4Fe8oE=; b=Usb+FvXdnqXan+JxkQBhdGOZlg wA8UpejFK3n0fE9XGKnHea/t+aVmCLNRdL7zyLOKMHR/dWmt8G+Uti19C3t90dgjsk4S7ZmmczWW/ Ez3AKbTKg6yUn6tUW5+u4MpklOAJAQnTCpStyLhkGLJDPCmD0JQX8BrT1uo7sHkztqwtq1fc9ZM2b o78zCaIVcICZg6b86ord1mHoE9JLaN/VgoJYMDdw8Sgqo+kfaEwvvg/+opdzznV32stUMmPSO0mvj LXNeSO8BGPnOt71kyP+5iI5jquMiHZDOCO0MSCezo82fW/woNvE7xDCV4KBMauuhWx5/PsaqHRErw 2IXgzbiQ==; Received: from [2001:4bb8:184:4aa1:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jP60F-00037B-JH; Thu, 16 Apr 2020 15:00:31 +0000 From: Christoph Hellwig To: Thomas Bogendoerfer Subject: [PATCH 7/7] MIPS: use ioremap_page_range Date: Thu, 16 Apr 2020 17:00:11 +0200 Message-Id: <20200416150011.820984-8-hch@lst.de> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200416150011.820984-1-hch@lst.de> References: <20200416150011.820984-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Cc: linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, Mark Brown , Liam Girdwood , linux-mips@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Use the generic ioremap_page_range helper instead of reimplementing it. Signed-off-by: Christoph Hellwig --- arch/mips/mm/ioremap.c | 112 ++++------------------------------------- 1 file changed, 11 insertions(+), 101 deletions(-) diff --git a/arch/mips/mm/ioremap.c b/arch/mips/mm/ioremap.c index c5b5181c7cd0..b6dad2fd5575 100644 --- a/arch/mips/mm/ioremap.c +++ b/arch/mips/mm/ioremap.c @@ -14,99 +14,14 @@ #include #include #include +#include #include -#include #include #include #define IS_LOW512(addr) (!((phys_addr_t)(addr) & (phys_addr_t) ~0x1fffffffULL)) #define IS_KSEG1(addr) (((unsigned long)(addr) & ~0x1fffffffUL) == CKSEG1) -static inline void remap_area_pte(pte_t * pte, unsigned long address, - phys_addr_t size, phys_addr_t phys_addr, unsigned long flags) -{ - phys_addr_t end; - unsigned long pfn; - pgprot_t pgprot = __pgprot(_PAGE_GLOBAL | _PAGE_PRESENT | __READABLE - | __WRITEABLE | flags); - - address &= ~PMD_MASK; - end = address + size; - if (end > PMD_SIZE) - end = PMD_SIZE; - BUG_ON(address >= end); - pfn = phys_addr >> PAGE_SHIFT; - do { - if (!pte_none(*pte)) { - printk("remap_area_pte: page already exists\n"); - BUG(); - } - set_pte(pte, pfn_pte(pfn, pgprot)); - address += PAGE_SIZE; - pfn++; - pte++; - } while (address && (address < end)); -} - -static inline int remap_area_pmd(pmd_t * pmd, unsigned long address, - phys_addr_t size, phys_addr_t phys_addr, unsigned long flags) -{ - phys_addr_t end; - - address &= ~PGDIR_MASK; - end = address + size; - if (end > PGDIR_SIZE) - end = PGDIR_SIZE; - phys_addr -= address; - BUG_ON(address >= end); - do { - pte_t * pte = pte_alloc_kernel(pmd, address); - if (!pte) - return -ENOMEM; - remap_area_pte(pte, address, end - address, address + phys_addr, flags); - address = (address + PMD_SIZE) & PMD_MASK; - pmd++; - } while (address && (address < end)); - return 0; -} - -static int remap_area_pages(unsigned long address, phys_addr_t phys_addr, - phys_addr_t size, unsigned long flags) -{ - int error; - pgd_t * dir; - unsigned long end = address + size; - - phys_addr -= address; - dir = pgd_offset(&init_mm, address); - flush_cache_all(); - BUG_ON(address >= end); - do { - p4d_t *p4d; - pud_t *pud; - pmd_t *pmd; - - error = -ENOMEM; - p4d = p4d_alloc(&init_mm, dir, address); - if (!p4d) - break; - pud = pud_alloc(&init_mm, p4d, address); - if (!pud) - break; - pmd = pmd_alloc(&init_mm, pud, address); - if (!pmd) - break; - if (remap_area_pmd(pmd, address, end - address, - phys_addr + address, flags)) - break; - error = 0; - address = (address + PGDIR_SIZE) & PGDIR_MASK; - dir++; - } while (address && (address < end)); - flush_tlb_all(); - return error; -} - static int __ioremap_check_ram(unsigned long start_pfn, unsigned long nr_pages, void *arg) { @@ -135,7 +50,7 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, unsigned long size, unsigned long offset, pfn, last_pfn; struct vm_struct *area; phys_addr_t last_addr; - void *addr; + unsigned long vaddr; void __iomem *cpu_addr; cpu_addr = plat_ioremap(phys_addr, size, flags); @@ -183,27 +98,22 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, unsigned long size, area = get_vm_area(size, VM_IOREMAP); if (!area) return NULL; - addr = area->addr; - if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) { - vunmap(addr); + vaddr = (unsigned long)area->addr; + + flags |= _PAGE_GLOBAL | _PAGE_PRESENT | __READABLE | __WRITEABLE; + if (ioremap_page_range(vaddr, vaddr + size, phys_addr, + __pgprot(flags))) { + free_vm_area(area); return NULL; } - return (void __iomem *) (offset + (char *)addr); + return (void __iomem *)(vaddr + offset); } EXPORT_SYMBOL(ioremap_prot); void iounmap(const volatile void __iomem *addr) { - struct vm_struct *p; - - if (plat_iounmap(addr) || IS_KSEG1(addr)) - return; - - p = remove_vm_area((void *) (PAGE_MASK & (unsigned long __force) addr)); - if (!p) - printk(KERN_ERR "iounmap: bad address %p\n", addr); - - kfree(p); + if (!plat_iounmap(addr) && !IS_KSEG1(addr)) + vunmap((void *)((unsigned long)addr & PAGE_MASK)); } EXPORT_SYMBOL(iounmap);