From patchwork Thu Mar 24 01:48:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 12793927 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 98D34C41535 for ; Mon, 28 Mar 2022 16:44:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243145AbiC1QqJ (ORCPT ); Mon, 28 Mar 2022 12:46:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45196 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242797AbiC1QqC (ORCPT ); Mon, 28 Mar 2022 12:46:02 -0400 Received: from mail.baikalelectronics.ru (mail.baikalelectronics.com [87.245.175.226]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2D32821E13; Mon, 28 Mar 2022 09:44:16 -0700 (PDT) Received: from mail.baikalelectronics.ru (unknown [192.168.51.25]) by mail.baikalelectronics.ru (Postfix) with ESMTP id CE2FC1E4950; Thu, 24 Mar 2022 04:48:48 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.baikalelectronics.ru CE2FC1E4950 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baikalelectronics.ru; s=mail; t=1648086528; bh=07SRlapZtu731QyO68AdsHUcdhg+LQaXPzJQDvb9RUM=; h=From:To:CC:Subject:Date:In-Reply-To:References:From; b=eD8bqqoWrLE5KJtuTrjuEOsU/DEtGiVtOjb4KxjWS5T5oGoWlp56moVhVyGRAhhB0 n3KHkXc2wudCIyXK5Zw9meNV1AbiK6kh1pBVfyWJK3ZjLNG7kwo4QbKMf+7PkCJuVw rC0UmfcBs0P8pKNDIVyWUaCddfgatAyeTOgVNLs4= Received: from localhost (192.168.168.10) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 24 Mar 2022 04:48:48 +0300 From: Serge Semin To: Gustavo Pimentel , Vinod Koul , Jingoo Han , Bjorn Helgaas , Frank Li , Manivannan Sadhasivam CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , Lorenzo Pieralisi , Rob Herring , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , , , Subject: [PATCH 15/25] dmaengine: dw-edma: Convert DebugFS descs to being kz-allocated Date: Thu, 24 Mar 2022 04:48:26 +0300 Message-ID: <20220324014836.19149-16-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20220324014836.19149-1-Sergey.Semin@baikalelectronics.ru> References: <20220324014836.19149-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Currently all the DW eDMA DebugFS nodes descriptors are allocated on stack, while the DW eDMA driver private data and CSR limits are statically preserved. Such design won't work for the multi-eDMA platforms. As a preparation to adding the multi-eDMA system setups support we need to have each DebugFS node separately allocated and described. Afterwards we'll put an addition info there like Read/Write channel flag, channel ID, DW eDMA private data reference. Note this conversion is mainly required due to having the legacy DW eDMA controllers with indirect Read/Write channels context CSRs access. If we didn't need to have a synchronized access to these registers the DebugFS code of the driver would have been much simpler. Signed-off-by: Serge Semin --- drivers/dma/dw-edma/dw-edma-v0-debugfs.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c index afd519d9568b..7eb0147912fa 100644 --- a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c +++ b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c @@ -53,7 +53,8 @@ struct dw_edma_debugfs_entry { static int dw_edma_debugfs_u32_get(void *data, u64 *val) { - void __iomem *reg = data; + struct dw_edma_debugfs_entry __iomem *entry = data; + void __iomem *reg = entry->reg; if (dw->chip->mf == EDMA_MF_EDMA_LEGACY && reg >= (void __iomem *)®s->type.legacy.ch) { @@ -94,14 +95,22 @@ static int dw_edma_debugfs_u32_get(void *data, u64 *val) } DEFINE_DEBUGFS_ATTRIBUTE(fops_x32, dw_edma_debugfs_u32_get, NULL, "0x%08llx\n"); -static void dw_edma_debugfs_create_x32(const struct dw_edma_debugfs_entry entries[], +static void dw_edma_debugfs_create_x32(const struct dw_edma_debugfs_entry ini[], int nr_entries, struct dentry *dir) { + struct dw_edma_debugfs_entry *entries; int i; + entries = devm_kcalloc(dw->chip->dev, nr_entries, sizeof(*entries), + GFP_KERNEL); + if (!entries) + return; + for (i = 0; i < nr_entries; i++) { + entries[i] = ini[i]; + debugfs_create_file_unsafe(entries[i].name, 0444, dir, - entries[i].reg, &fops_x32); + &entries[i], &fops_x32); } }