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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 2B09EC4320A for ; Tue, 24 Aug 2021 13:34:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C91C613B1 for ; Tue, 24 Aug 2021 13:34:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237486AbhHXNes (ORCPT ); Tue, 24 Aug 2021 09:34:48 -0400 Received: from mga02.intel.com ([134.134.136.20]:57663 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233407AbhHXNem (ORCPT ); Tue, 24 Aug 2021 09:34:42 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10085"; a="204508204" X-IronPort-AV: E=Sophos;i="5.84,347,1620716400"; d="scan'208";a="204508204" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2021 06:33:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,347,1620716400"; d="scan'208";a="597584075" Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 24 Aug 2021 06:33:55 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 68FC936A; Tue, 24 Aug 2021 16:33:56 +0300 (EEST) From: Andy Shevchenko To: Mauro Carvalho Chehab , Sakari Ailus , Andy Shevchenko , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Yong Zhi , Bingbu Cao , Dan Scally , Tianshu Qiu , Mauro Carvalho Chehab Subject: [RFT, PATCH v1 3/3] media: ipu3-cio2: Replace custom implementation of rotate() Date: Tue, 24 Aug 2021 16:33:51 +0300 Message-Id: <20210824133351.88179-3-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210824133351.88179-1-andriy.shevchenko@linux.intel.com> References: <20210824133351.88179-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org rotate() is more efficient than custom implementation. Replace the latter by the former. Signed-off-by: Andy Shevchenko --- This should be a copy'n'paste of the algorithm with a slight difference that it should copy by 4 or 8 bytes at a time. Nonetheless it has to be tested. Hence, RFT. (Obviously no hurry with this, we are close to release) drivers/media/pci/intel/ipu3/ipu3-cio2-main.c | 59 ++----------------- 1 file changed, 5 insertions(+), 54 deletions(-) diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c index 8bcba168cc57..0fd6040d2f2d 100644 --- a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include #include @@ -1877,56 +1878,6 @@ static int __maybe_unused cio2_runtime_resume(struct device *dev) return 0; } -/* - * Helper function to advance all the elements of a circular buffer by "start" - * positions - */ -static void arrange(void *ptr, size_t elem_size, size_t elems, size_t start) -{ - struct { - size_t begin, end; - } arr[2] = { - { 0, start - 1 }, - { start, elems - 1 }, - }; - -#define CHUNK_SIZE(a) ((a)->end - (a)->begin + 1) - - /* Loop as long as we have out-of-place entries */ - while (CHUNK_SIZE(&arr[0]) && CHUNK_SIZE(&arr[1])) { - size_t size0, i; - - /* - * Find the number of entries that can be arranged on this - * iteration. - */ - size0 = min(CHUNK_SIZE(&arr[0]), CHUNK_SIZE(&arr[1])); - - /* Swap the entries in two parts of the array. */ - for (i = 0; i < size0; i++) { - u8 *d = ptr + elem_size * (arr[1].begin + i); - u8 *s = ptr + elem_size * (arr[0].begin + i); - size_t j; - - for (j = 0; j < elem_size; j++) - swap(d[j], s[j]); - } - - if (CHUNK_SIZE(&arr[0]) > CHUNK_SIZE(&arr[1])) { - /* The end of the first array remains unarranged. */ - arr[0].begin += size0; - } else { - /* - * The first array is fully arranged so we proceed - * handling the next one. - */ - arr[0].begin = arr[1].begin; - arr[0].end = arr[1].begin + size0 - 1; - arr[1].begin += size0; - } - } -} - static void cio2_fbpt_rearrange(struct cio2_device *cio2, struct cio2_queue *q) { unsigned int i, j; @@ -1940,10 +1891,10 @@ static void cio2_fbpt_rearrange(struct cio2_device *cio2, struct cio2_queue *q) return; if (j) { - arrange(q->fbpt, sizeof(struct cio2_fbpt_entry) * CIO2_MAX_LOPS, - CIO2_MAX_BUFFERS, j); - arrange(q->bufs, sizeof(struct cio2_buffer *), - CIO2_MAX_BUFFERS, j); + rotate(q->fbpt, sizeof(struct cio2_fbpt_entry) * CIO2_MAX_LOPS, + CIO2_MAX_BUFFERS, j, NULL); + rotate(q->bufs, sizeof(struct cio2_buffer *), + CIO2_MAX_BUFFERS, j, NULL); } /* -- 2.32.0