From patchwork Fri Sep 16 11:39:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Whitchurch X-Patchwork-Id: 607293 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 E0E10C6FA8B for ; Fri, 16 Sep 2022 11:40:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230409AbiIPLkB (ORCPT ); Fri, 16 Sep 2022 07:40:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229863AbiIPLkA (ORCPT ); Fri, 16 Sep 2022 07:40:00 -0400 Received: from smtp2.axis.com (smtp2.axis.com [195.60.68.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E4C52B602; Fri, 16 Sep 2022 04:39:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axis.com; q=dns/txt; s=axis-central1; t=1663328398; x=1694864398; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=0O+QKem305LoINGTWe8PLbq0UAM4vzWU5ktHn5B5a3A=; b=L5guGB2OTf6KAA7BAswqBS/MOwYQk0GNo5Mkyyv5kuS+WzlohbYhJ6IP NjGl9aOAe6yke3BZulIikuVE7jd7xvpZCgJlwG3SuwbSojDAC/3r0m43W 1x+s/YhQahY12QQL9N6ySV4IOql0MrZgF+R9KApRkxtZXjGZ5XncS00MT MOKAkChA1tqIs0qGFbWxjNuAeXGOtYcGzv+zSw2O+Fe3AWLPTDG2Ar4gc aBDHM4RYp5ZKHBrLHgCabe3THMwkSs46MAjIomh5q+j56ULUZZEqorFXm dqOAqftNCpQw72E0v/Ky6amnl17JCkJf0NB5C3yK7E43YSf6/GGaRP5zQ A==; From: Vincent Whitchurch To: , , CC: , Vincent Whitchurch , , , , , Subject: [PATCH 1/4] spi: spi-loopback-test: Add test to trigger DMA/PIO mixing Date: Fri, 16 Sep 2022 13:39:48 +0200 Message-ID: <20220916113951.228398-2-vincent.whitchurch@axis.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220916113951.228398-1-vincent.whitchurch@axis.com> References: <20220916113951.228398-1-vincent.whitchurch@axis.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Add a test where a small and a large transfer in a message hit the same cache line. This test currently fails on spi-s3c64xx on in DMA mode since it ends up mixing DMA and PIO without proper cache maintenance. Signed-off-by: Vincent Whitchurch --- drivers/spi/spi-loopback-test.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c index 4d4f77a186a9..dd7de8fa37d0 100644 --- a/drivers/spi/spi-loopback-test.c +++ b/drivers/spi/spi-loopback-test.c @@ -313,6 +313,33 @@ static struct spi_test spi_tests[] = { }, }, }, + { + .description = "three tx+rx transfers with overlapping cache lines", + .fill_option = FILL_COUNT_8, + /* + * This should be large enough for the controller driver to + * choose to transfer it with DMA. + */ + .iterate_len = { 512, -1 }, + .iterate_transfer_mask = BIT(1), + .transfer_count = 3, + .transfers = { + { + .len = 1, + .tx_buf = TX(0), + .rx_buf = RX(0), + }, + { + .tx_buf = TX(1), + .rx_buf = RX(1), + }, + { + .len = 1, + .tx_buf = TX(513), + .rx_buf = RX(513), + }, + }, + }, { /* end of tests sequence */ } };