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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 CBB51C2D0A3 for ; Thu, 29 Oct 2020 22:51:53 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 2DA8C20782 for ; Thu, 29 Oct 2020 22:51:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="KeO9Lf0l"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ahaoaXOO"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="VCA691jL"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="STUDCvqB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2DA8C20782 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:Subject:To:From:Date: Message-Id:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:List-Owner; bh=WO/DZqm+rdQz/m3cBvfqaNcQfU+H7ffG2nunmxzvKyo=; b=KeO9Lf0lMolsBj0clF4AwrN/J efIkmCikKqynoj7hr7LaAGjsUSzGLIN2J5J3lgq5leGiBqZW3FCLVc1yHNMPNzAG1LvSEDE+yHjXv bbMjOvC3N/uw7/HPVfIkYzbXMfvZVg8d6N63iIPB4Ar2mzRP5j62YKKI+s9mY1lMHDN0dpDVHcILp o8g278Zhwnq6kam+FCJOV4748tK59EgV23WVsrgPBkj2JQDnPsbjZPVdCPToFDAM7wULojiAcQWuX fnYKGTa1QE0vRwwaubYvejOXb94uDFto9Nyc52ZzT2TuIylYebCOotI/Zh5M916tzSp46RdUcWmvZ wHj/VeURQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYGlr-000160-LG; Thu, 29 Oct 2020 22:51:51 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYGli-0000zC-Ky; Thu, 29 Oct 2020 22:51:42 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-transfer-encoding:Content-Type: MIME-Version:References:Subject:Cc:To:From:Date:Message-Id:Sender:Reply-To: Content-ID:Content-Description:In-Reply-To; bh=bMLYR+ULvXX0256D4Df+wpxshaXLT7cqrLUawfmTX9Q=; b=ahaoaXOOg4dfv3Zn9lAq+ULQUU bGPbvmizxcXEjuAOWEvaXVoOb1IWWCKypMIQRdriZBNOV4PdXNYc7wlEy7OCq5w880M01ers04GLN 7O1MYsfHeWpZ/g6wvd8/Pd9J2eDpXmZ6tCYzBOj3PrrU3lFkk2uidhyehHkSsM77vBJqBmR9wldvS MKYT/mx/Wk/z7ZJh3JOLWDNgZc3cEzLuYPDRL0VTBw0BgdSSIkgJ0XiwgCcpu90gurNy8ZIXjMKLm CBK6+U71gqr2CQCkwAuD8TnFqTFgnrlnS5MkqlATG51nksCJBZNb3Y0ikbBMPRa1GD3UPZesXYa3u MJo6XvFQ==; Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by casper.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYGT9-0003Ht-TD; Thu, 29 Oct 2020 22:32:45 +0000 Message-Id: <20201029222652.396632514@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1604010750; 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: references:references; bh=bMLYR+ULvXX0256D4Df+wpxshaXLT7cqrLUawfmTX9Q=; b=VCA691jLGnAZqdkXjZ9aUxRkLnyXLfBMqRSIRGqu4/sp5RVdZI3iAlpz3yv3t1RyGv51sf aj9j5cUxfpMz1aNToNIzkolkGvpz7ly1nZ0wFgpScVGDCVLa9utWAflNggS31P6+Vx5DgO 1C8/Ue4XDTwlZf88m6Fw19NheeTWMADwN2TxrPGwBVXeCC/gnrTmhvqU8zHGAfIieyG/Z5 i1fEod79b3LJX5Bn5Do/KyPghX9o5UthsAzdPKiEuUUjL0qxS/SNe26GnpIA1NCCeOno1z DFWxF3vPmxWQH5W4OmZ6SbVraqTnScVGk0DBL33R6duvu8JhKTsFJouGGv1nyQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1604010750; 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: references:references; bh=bMLYR+ULvXX0256D4Df+wpxshaXLT7cqrLUawfmTX9Q=; b=STUDCvqBTgV5xXrnXgKMETTb5aOCokIJFCvgDEer9TTJtzFGrKJQw3D5iibPwOcWdvspr/ F17h1AXIu/YLuvCg== Date: Thu, 29 Oct 2020 23:18:24 +0100 From: Thomas Gleixner To: LKML Subject: [patch V2 18/18] io-mapping: Provide iomap_local variant References: <20201029221806.189523375@linutronix.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201029_223232_902765_0614B2FD X-CRM114-Status: GOOD ( 11.11 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juri Lelli , linux-xtensa@linux-xtensa.org, Peter Zijlstra , Benjamin Herrenschmidt , Sebastian Andrzej Siewior , Ben Segall , linux-mm@kvack.org, Guo Ren , sparclinux@vger.kernel.org, Vincent Chen , Ingo Molnar , linux-arch@vger.kernel.org, Vincent Guittot , Herbert Xu , Michael Ellerman , x86@kernel.org, Russell King , linux-csky@vger.kernel.org, Christoph Hellwig , David Airlie , Mel Gorman , linux-snps-arc@lists.infradead.org, Ard Biesheuvel , Paul McKenney , linuxppc-dev@lists.ozlabs.org, Steven Rostedt , Linus Torvalds , Greentime Hu , Dietmar Eggemann , linux-arm-kernel@lists.infradead.org, Chris Zankel , Michal Simek , Thomas Bogendoerfer , Nick Hu , Max Filippov , Vineet Gupta , linux-mips@vger.kernel.org, Arnd Bergmann , Daniel Vetter , Paul Mackerras , Andrew Morton , Daniel Bristot de Oliveira , "David S. Miller" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org Similar to kmap local provide a iomap local variant which only disables migration, but neither disables pagefaults nor preemption. Signed-off-by: Thomas Gleixner --- V2: Split out from the large combo patch and add the !IOMAP_ATOMIC variants --- include/linux/io-mapping.h | 34 ++++++++++++++++++++++++++++++++-- 1 file changed, 32 insertions(+), 2 deletions(-) --- a/include/linux/io-mapping.h +++ b/include/linux/io-mapping.h @@ -83,6 +83,23 @@ io_mapping_unmap_atomic(void __iomem *va } static inline void __iomem * +io_mapping_map_local_wc(struct io_mapping *mapping, unsigned long offset) +{ + resource_size_t phys_addr; + + BUG_ON(offset >= mapping->size); + phys_addr = mapping->base + offset; + migrate_disable(); + return __iomap_local_pfn_prot(PHYS_PFN(phys_addr), mapping->prot); +} + +static inline void io_mapping_unmap_local(void __iomem *vaddr) +{ + kunmap_local_indexed((void __force *)vaddr); + migrate_enable(); +} + +static inline void __iomem * io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset, unsigned long size) @@ -101,7 +118,7 @@ io_mapping_unmap(void __iomem *vaddr) iounmap(vaddr); } -#else +#else /* HAVE_ATOMIC_IOMAP */ #include @@ -166,7 +183,20 @@ io_mapping_unmap_atomic(void __iomem *va preempt_enable(); } -#endif /* HAVE_ATOMIC_IOMAP */ +static inline void __iomem * +io_mapping_map_local_wc(struct io_mapping *mapping, unsigned long offset) +{ + migrate_disable(); + return io_mapping_map_wc(mapping, offset, PAGE_SIZE); +} + +static inline void io_mapping_unmap_local(void __iomem *vaddr) +{ + io_mapping_unmap(vaddr); + migrate_enable(); +} + +#endif /* !HAVE_ATOMIC_IOMAP */ static inline struct io_mapping * io_mapping_create_wc(resource_size_t base, _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc