From patchwork Fri May 7 00:01:13 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ralph Campbell X-Patchwork-Id: 97531 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o4708TeJ013485 for ; Fri, 7 May 2010 00:20:23 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752491Ab0EGABO (ORCPT ); Thu, 6 May 2010 20:01:14 -0400 Received: from vpn.pathscale.com ([198.186.3.75]:51925 "HELO mx.mv.qlogic.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with SMTP id S1752489Ab0EGABO (ORCPT ); Thu, 6 May 2010 20:01:14 -0400 Received: from chromite.mv.qlogic.com (chromite.mv.qlogic.com [10.29.2.82]) by mx.mv.qlogic.com (Postfix) with ESMTP id B82D7949C01A; Thu, 6 May 2010 17:01:13 -0700 (PDT) Received: from chromite.mv.qlogic.com (localhost.localdomain [127.0.0.1]) by chromite.mv.qlogic.com (Postfix) with ESMTP id B82EE142961; Thu, 6 May 2010 17:01:13 -0700 (PDT) From: Ralph Campbell Subject: [PATCH v3 27/52] IB/qib: Add qib_pio_copy.c To: Roland Dreier Cc: linux-rdma@vger.kernel.org Date: Thu, 06 May 2010 17:01:13 -0700 Message-ID: <20100507000113.3441.19315.stgit@chromite.mv.qlogic.com> In-Reply-To: <20100506235849.3441.85930.stgit@chromite.mv.qlogic.com> References: <20100506235849.3441.85930.stgit@chromite.mv.qlogic.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Fri, 07 May 2010 00:20:50 +0000 (UTC) diff --git a/drivers/infiniband/hw/qib/qib_pio_copy.c b/drivers/infiniband/hw/qib/qib_pio_copy.c new file mode 100644 index 0000000..10b8c44 --- /dev/null +++ b/drivers/infiniband/hw/qib/qib_pio_copy.c @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2009 QLogic Corporation. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "qib.h" + +/** + * qib_pio_copy - copy data to MMIO space, in multiples of 32-bits + * @to: destination, in MMIO space (must be 64-bit aligned) + * @from: source (must be 64-bit aligned) + * @count: number of 32-bit quantities to copy + * + * Copy data from kernel space to MMIO space, in multiples of 32 bits at a + * time. Order of access is not guaranteed, nor is a memory barrier + * performed afterwards. + */ +void qib_pio_copy(void __iomem *to, const void *from, size_t count) +{ +#ifdef CONFIG_64BIT + u64 __iomem *dst = to; + const u64 *src = from; + const u64 *end = src + (count >> 1); + + while (src < end) + __raw_writeq(*src++, dst++); + if (count & 1) + __raw_writel(*(const u32 *)src, dst); +#else + u32 __iomem *dst = to; + const u32 *src = from; + const u32 *end = src + count; + + while (src < end) + __raw_writel(*src++, dst++); +#endif +}