From patchwork Mon Nov 7 21:04:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 13035222 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 57827C4332F for ; Mon, 7 Nov 2022 21:04:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233076AbiKGVEt (ORCPT ); Mon, 7 Nov 2022 16:04:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231812AbiKGVEr (ORCPT ); Mon, 7 Nov 2022 16:04:47 -0500 X-Greylist: delayed 879 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 07 Nov 2022 13:04:45 PST Received: from post.baikalelectronics.com (post.baikalelectronics.com [213.79.110.86]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2A8BC60D1; Mon, 7 Nov 2022 13:04:45 -0800 (PST) Received: from post.baikalelectronics.com (localhost.localdomain [127.0.0.1]) by post.baikalelectronics.com (Proxmox) with ESMTP id 2931FE0EC9; Tue, 8 Nov 2022 00:04:44 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= baikalelectronics.ru; h=cc:cc:content-transfer-encoding :content-type:content-type:date:from:from:message-id :mime-version:reply-to:subject:subject:to:to; s=post; bh=hnlX7bC +gayZpkT2E1EdXZ6brCuDmzJSpSB3RuvyNhI=; b=aWdZICok9tD3FoTOYziUKgT Fx6QkWW/PKw1CLfI038UqYRtUPCO5r7l803eRm05wFN5xIU2ZWhRIxNpRvFSoZET cbAQwxw5nPoCls+oGo0W3o4fmsp4jN0ndkr/DoqgF44i4QHkVtLjv9/dxhvJV2HN kq0OL0/xgFvq5TNJYJfI= Received: from mail.baikal.int (mail.baikal.int [192.168.51.25]) by post.baikalelectronics.com (Proxmox) with ESMTP id 0702CE0E6A; Tue, 8 Nov 2022 00:04:44 +0300 (MSK) Received: from localhost (192.168.168.10) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 8 Nov 2022 00:04:43 +0300 From: Serge Semin To: Gustavo Pimentel , Vinod Koul , Rob Herring , Bjorn Helgaas , Lorenzo Pieralisi , Cai Huoqing , Robin Murphy , Jingoo Han , Frank Li , Manivannan Sadhasivam CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , =?utf-8?q?Krzys?= =?utf-8?q?ztof_Wilczy=C5=84ski?= , caihuoqing , , , Subject: [PATCH v6 00/24] dmaengine: dw-edma: Add RP/EP local DMA controllers support Date: Tue, 8 Nov 2022 00:04:14 +0300 Message-ID: <20221107210438.1515-1-Sergey.Semin@baikalelectronics.ru> X-Mailer: git-send-email 2.38.0 MIME-Version: 1.0 X-Originating-IP: [192.168.168.10] 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 This is a final patchset in the series created in the framework of my Baikal-T1 PCIe/eDMA-related work: [1: Done v5] PCI: dwc: Various fixes and cleanups Link: https://lore.kernel.org/linux-pci/20220624143428.8334-1-Sergey.Semin@baikalelectronics.ru/ Merged: kernel 6.0-rc1 [2: Done v4] PCI: dwc: Add hw version and dma-ranges support Link: https://lore.kernel.org/linux-pci/20220624143947.8991-1-Sergey.Semin@baikalelectronics.ru/ Merged: kernel 6.0-rc1 [3: In-review v6] PCI: dwc: Add generic resources and Baikal-T1 support Link: https://lore.kernel.org/linux-pci/20221107204934.32655-1-Sergey.Semin@baikalelectronics.ru/ [4: Done v6] dmaengine: dw-edma: Add RP/EP local DMA support Link: ---you are looking at it--- Note it is very recommended to merge the patchsets in the same order as they are listed in the set above in order to have them applied smoothly. So @Bjorn, @Lorenzo as we agreed let's merge the leftover patchsets in via your repos. Here is a short summary regarding this patchset. The series starts with fixes patches. We discovered that the dw-edma-pcie.c driver incorrectly initializes the LL/DT base addresses for the platforms with not matching CPU and PCIe memory spaces. It is fixed by using the pci_bus_address() method to get a correct base address. After that you can find a series of the interleaved xfers fixes. It turned out the interleaved transfers implementation didn't work quite correctly from the very beginning for instance missing src/dst addresses initialization, etc. In the framework of the next two patches we suggest to add a new platform-specific callback - pci_address() and use it to convert the CPU address to the PCIe space address. It is at least required for the DW eDMA remote End-point setup on the platforms with not-matching CPU/PCIe address spaces. In case of the DW eDMA local RP/EP setup the conversion will be done automatically by the outbound iATU (if no DMA-bypass flag is specified for the corresponding iATU window). Then we introduce a set of the patches to make the DebugFS part of the code supporting the multi-eDMA controllers platforms. It starts with several cleanup patches and is closed joining the Read/Write channels into a single DMA-device as they originally should have been. After that you can find the patches with adding the non-atomic io-64 methods usage, dropping DT-region descriptors allocation, replacing chip IDs with the device name. In addition to that in order to have the eDMA embedded into the DW PCIe RP/EP supported we need to bypass the dma-ranges-based memory ranges mapping since in case of the root port DT node it's applicable for the peripheral PCIe devices only. Finally at the series closure we introduce a generic DW eDMA controller support being available in the DW PCIe Root Port/Endpoint driver. Link: https://lore.kernel.org/linux-pci/20220324014836.19149-1-Sergey.Semin@baikalelectronics.ru/ Changelog v2: - Drop the patches: [PATCH 1/25] dmaengine: dw-edma: Drop dma_slave_config.direction field usage [PATCH 2/25] dmaengine: dw-edma: Fix eDMA Rd/Wr-channels and DMA-direction semantics since they are going to be merged in in the framework of the Frank's patchset. - Add a new patch: "dmaengine: dw-edma: Release requested IRQs on failure." - Drop __iomem qualifier from the struct dw_edma_debugfs_entry instance definition in the dw_edma_debugfs_u32_get() method. (@Manivannan) - Add a new patch: "dmaengine: dw-edma: Rename DebugFS dentry variables to 'dent'." (@Manivannan) - Slightly extend the eDMA name array size. (@Manivannan) - Change the specific DMA mapping comment a bit to being clearer. (@Manivannan) - Add a new patch: "PCI: dwc: Add generic iATU/eDMA CSRs space detection method." - Don't fail eDMA detection procedure if the DW eDMA driver couldn't probe device. That happens if the driver is disabled. (@Manivannan) - Add "dma" registers resource mapping procedure. (@Manivannan) - Move the eDMA CSRs space detection into the dw_pcie_map_detect() method. - Remove eDMA on the dw_pcie_ep_init() internal errors. (@Manivannan) - Remove eDMA in the dw_pcie_ep_exit() method. - Move the dw_pcie_edma_detect() method execution to the tail of the dw_pcie_ep_init() function. Link: https://lore.kernel.org/linux-pci/20220503225104.12108-1-Sergey.Semin@baikalelectronics.ru/ Changelog v3: - Conditionally set dchan->dev->device.dma_coherent field since it can be missing on some platforms. (@Manivannan) - Drop the patch: "PCI: dwc: Add generic iATU/eDMA CSRs space detection method". A similar modification has been done in another patchset. - Add more comprehensive and less regression prune eDMA block detection procedure. - Drop the patch: "dma-direct: take dma-ranges/offsets into account in resource mapping". It will be separately reviewed. - Remove Manivannan tb tag from the modified patches. - Rebase onto the kernel v5.18. Link: https://lore.kernel.org/linux-pci/20220610091459.17612-1-Sergey.Semin@baikalelectronics.ru Changelog v4: - Rabase onto the laters Frank Li series: Link: https://lore.kernel.org/all/20220524152159.2370739-1-Frank.Li@nxp.com/ - Add Vinod' Ab-tag. - Rebase onto the kernel v5.19-rcX. Link: https://lore.kernel.org/linux-pci/20220728142841.12305-1-Sergey.Semin@baikalelectronics.ru Changelog v5: - Just resend. - Rebase onto the kernel v6.0-rc2. Link: https://lore.kernel.org/linux-pci/20220822185332.26149-1-Sergey.Semin@baikalelectronics.ru Changelog v6: - Fix some patchlog and in-line comments misspells. (@Bjorn) - Directly call *_dma_configure() method on the DW eDMA channel child device used for the DMA buffers mapping. (@Robin) - Explicitly set the DMA-mask of the child device in the channel allocation proecedure. (@Robin) - Rebase onto the kernel v6.1-rc3. Signed-off-by: Serge Semin Reviewed-by: Manivannan Sadhasivam Tested-by: Manivannan Sadhasivam Acked-By: Vinod Koul Cc: Alexey Malahov Cc: Pavel Parkhomenko Cc: "Krzysztof Wilczyński" Cc: caihuoqing Cc: linux-pci@vger.kernel.org Cc: dmaengine@vger.kernel.org Cc: linux-kernel@vger.kernel.org Serge Semin (24): dmaengine: Fix dma_slave_config.dst_addr description dmaengine: dw-edma: Release requested IRQs on failure dmaengine: dw-edma: Convert ll/dt phys-address to PCIe bus/DMA address dmaengine: dw-edma: Fix missing src/dst address of the interleaved xfers dmaengine: dw-edma: Don't permit non-inc interleaved xfers dmaengine: dw-edma: Fix invalid interleaved xfers semantics dmaengine: dw-edma: Add CPU to PCIe bus address translation dmaengine: dw-edma: Add PCIe bus address getter to the remote EP glue-driver dmaengine: dw-edma: Drop chancnt initialization dmaengine: dw-edma: Fix DebugFS reg entry type dmaengine: dw-edma: Stop checking debugfs_create_*() return value dmaengine: dw-edma: Add dw_edma prefix to the DebugFS nodes descriptor dmaengine: dw-edma: Convert DebugFS descs to being kz-allocated dmaengine: dw-edma: Rename DebugFS dentry variables to 'dent' dmaengine: dw-edma: Simplify the DebugFS context CSRs init procedure dmaengine: dw-edma: Move eDMA data pointer to DebugFS node descriptor dmaengine: dw-edma: Join Write/Read channels into a single device dmaengine: dw-edma: Use DMA-engine device DebugFS subdirectory dmaengine: dw-edma: Use non-atomic io-64 methods dmaengine: dw-edma: Drop DT-region allocation dmaengine: dw-edma: Replace chip ID number with device name dmaengine: dw-edma: Bypass dma-ranges mapping for the local setup dmaengine: dw-edma: Skip cleanup procedure if no private data found PCI: dwc: Add DW eDMA engine support drivers/dma/dw-edma/dw-edma-core.c | 240 ++++++----- drivers/dma/dw-edma/dw-edma-core.h | 10 +- drivers/dma/dw-edma/dw-edma-pcie.c | 24 +- drivers/dma/dw-edma/dw-edma-v0-core.c | 60 +-- drivers/dma/dw-edma/dw-edma-v0-core.h | 1 - drivers/dma/dw-edma/dw-edma-v0-debugfs.c | 372 ++++++++---------- drivers/dma/dw-edma/dw-edma-v0-debugfs.h | 5 - .../pci/controller/dwc/pcie-designware-ep.c | 12 +- .../pci/controller/dwc/pcie-designware-host.c | 13 +- drivers/pci/controller/dwc/pcie-designware.c | 186 +++++++++ drivers/pci/controller/dwc/pcie-designware.h | 20 + include/linux/dma/edma.h | 18 +- include/linux/dmaengine.h | 2 +- 13 files changed, 607 insertions(+), 356 deletions(-)