From patchwork Sat Apr 15 02:35:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 1769231 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Sq9Y8pcb; dkim-atps=neutral Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4Pyy9q5f3Tz1yXv for ; Sat, 15 Apr 2023 12:36:15 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229848AbjDOCgO (ORCPT ); Fri, 14 Apr 2023 22:36:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230060AbjDOCgN (ORCPT ); Fri, 14 Apr 2023 22:36:13 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BAF0F1703 for ; Fri, 14 Apr 2023 19:36:07 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2156364295 for ; Sat, 15 Apr 2023 02:36:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1DD44C433EF; Sat, 15 Apr 2023 02:36:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1681526166; bh=UQud1eQPhJzFP6dbMTzs8ix8ez2vCUMK13c+42SP0mo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Sq9Y8pcbscymqLJOj/hpRb4q225PawyIE3jIj3eF/HRv87hvDTnudqgD3vuXB0qJl BGY+pVI0judVzhRSnczdFq+KpC6YHnCb0KgrjI0sNFwyHfk76s+PNglpKH7+WqUzw5 27zjFpkfCVQ0fKJ5ksvqc9l0lqcns00wTvjcJTchq5Fck4DJcMW8OYZlWqQHcy8iq1 lRPo13xVe3g5vLCl2d8HVBYEimvWjz8wgBN0xRxkuBc07NZ9lt86+4nq91Novp42Vt 0qKw1OxqeuaqI6wzd2VdHBgGUdKE+yM+P7O0zm9u9UDdeLgjyMQsRRZwoZE35aLjUR X+G7EWNZqVs3w== From: Damien Le Moal To: Bjorn Helgaas , linux-pci@vger.kernel.org Cc: Rick Wertenbroek , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Manivannan Sadhasivam , Kishon Vijay Abraham I , Arnd Bergmann , Greg Kroah-Hartman Subject: [PATCH v5 12/17] PCI: epf-test: Simplify DMA support checks Date: Sat, 15 Apr 2023 11:35:37 +0900 Message-Id: <20230415023542.77601-13-dlemoal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230415023542.77601-1-dlemoal@kernel.org> References: <20230415023542.77601-1-dlemoal@kernel.org> MIME-Version: 1.0 X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_HI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org There is no need to have each read, write and copy test functions check for the FLAG_USE_DMA flag against the DMA support status indicated by epf_test->dma_supported. Move this test to the command handler function pci_epf_test_cmd_handler() to check once for all cases. Signed-off-by: Damien Le Moal Reviewed-by: Manivannan Sadhasivam --- drivers/pci/endpoint/functions/pci-epf-test.c | 45 +++++++------------ 1 file changed, 15 insertions(+), 30 deletions(-) diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index e528b0915444..909e3e8ac01c 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -329,7 +329,6 @@ static void pci_epf_test_copy(struct pci_epf_test *epf_test, struct pci_epf_test_reg *reg) { int ret; - bool use_dma; void __iomem *src_addr; void __iomem *dst_addr; phys_addr_t src_phys_addr; @@ -372,14 +371,7 @@ static void pci_epf_test_copy(struct pci_epf_test *epf_test, } ktime_get_ts64(&start); - use_dma = !!(reg->flags & FLAG_USE_DMA); - if (use_dma) { - if (!epf_test->dma_supported) { - dev_err(dev, "Cannot transfer data using DMA\n"); - ret = -EINVAL; - goto err_map_addr; - } - + if (reg->flags & FLAG_USE_DMA) { if (epf_test->dma_private) { dev_err(dev, "Cannot transfer data using DMA\n"); ret = -EINVAL; @@ -405,7 +397,8 @@ static void pci_epf_test_copy(struct pci_epf_test *epf_test, kfree(buf); } ktime_get_ts64(&end); - pci_epf_test_print_rate("COPY", reg->size, &start, &end, use_dma); + pci_epf_test_print_rate("COPY", reg->size, &start, &end, + reg->flags & FLAG_USE_DMA); err_map_addr: pci_epc_unmap_addr(epc, epf->func_no, epf->vfunc_no, dst_phys_addr); @@ -433,7 +426,6 @@ static void pci_epf_test_read(struct pci_epf_test *epf_test, void __iomem *src_addr; void *buf; u32 crc32; - bool use_dma; phys_addr_t phys_addr; phys_addr_t dst_phys_addr; struct timespec64 start, end; @@ -464,14 +456,7 @@ static void pci_epf_test_read(struct pci_epf_test *epf_test, goto err_map_addr; } - use_dma = !!(reg->flags & FLAG_USE_DMA); - if (use_dma) { - if (!epf_test->dma_supported) { - dev_err(dev, "Cannot transfer data using DMA\n"); - ret = -EINVAL; - goto err_dma_map; - } - + if (reg->flags & FLAG_USE_DMA) { dst_phys_addr = dma_map_single(dma_dev, buf, reg->size, DMA_FROM_DEVICE); if (dma_mapping_error(dma_dev, dst_phys_addr)) { @@ -496,7 +481,8 @@ static void pci_epf_test_read(struct pci_epf_test *epf_test, ktime_get_ts64(&end); } - pci_epf_test_print_rate("READ", reg->size, &start, &end, use_dma); + pci_epf_test_print_rate("READ", reg->size, &start, &end, + reg->flags & FLAG_USE_DMA); crc32 = crc32_le(~0, buf, reg->size); if (crc32 != reg->checksum) @@ -524,7 +510,6 @@ static void pci_epf_test_write(struct pci_epf_test *epf_test, int ret; void __iomem *dst_addr; void *buf; - bool use_dma; phys_addr_t phys_addr; phys_addr_t src_phys_addr; struct timespec64 start, end; @@ -558,14 +543,7 @@ static void pci_epf_test_write(struct pci_epf_test *epf_test, get_random_bytes(buf, reg->size); reg->checksum = crc32_le(~0, buf, reg->size); - use_dma = !!(reg->flags & FLAG_USE_DMA); - if (use_dma) { - if (!epf_test->dma_supported) { - dev_err(dev, "Cannot transfer data using DMA\n"); - ret = -EINVAL; - goto err_dma_map; - } - + if (reg->flags & FLAG_USE_DMA) { src_phys_addr = dma_map_single(dma_dev, buf, reg->size, DMA_TO_DEVICE); if (dma_mapping_error(dma_dev, src_phys_addr)) { @@ -592,7 +570,8 @@ static void pci_epf_test_write(struct pci_epf_test *epf_test, ktime_get_ts64(&end); } - pci_epf_test_print_rate("WRITE", reg->size, &start, &end, use_dma); + pci_epf_test_print_rate("WRITE", reg->size, &start, &end, + reg->flags & FLAG_USE_DMA); /* * wait 1ms inorder for the write to complete. Without this delay L3 @@ -679,6 +658,12 @@ static void pci_epf_test_cmd_handler(struct work_struct *work) WRITE_ONCE(reg->command, 0); WRITE_ONCE(reg->status, 0); + if ((READ_ONCE(reg->flags) & FLAG_USE_DMA) && + !epf_test->dma_supported) { + dev_err(dev, "Cannot transfer data using DMA\n"); + goto reset_handler; + } + if (reg->irq_type > IRQ_TYPE_MSIX) { dev_err(dev, "Failed to detect IRQ type\n"); goto reset_handler;