From patchwork Mon Aug 22 18:53:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 12951154 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 CA03BC28D13 for ; Mon, 22 Aug 2022 18:54:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237795AbiHVSyf (ORCPT ); Mon, 22 Aug 2022 14:54:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237471AbiHVSyO (ORCPT ); Mon, 22 Aug 2022 14:54:14 -0400 Received: from mail.baikalelectronics.com (mail.baikalelectronics.com [87.245.175.230]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4A9933D5AB; Mon, 22 Aug 2022 11:53:48 -0700 (PDT) Received: from mail (mail.baikal.int [192.168.51.25]) by mail.baikalelectronics.com (Postfix) with ESMTP id EEA00DA2; Mon, 22 Aug 2022 21:57:00 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.baikalelectronics.com EEA00DA2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baikalelectronics.ru; s=mail; t=1661194621; bh=m9aZ/RTbTNANM5LEXVsexSnotMe67IHTU66AJVo2BeI=; h=From:To:CC:Subject:Date:From; b=rzF4c1K3U/kc2lgoDmO3C1pSfCG2sWluGe1qshUQgsCdfQ+RcO65nGT2uHMfay389 ywdmDu6VwL/a2aIaFlryhlyc+2G/aY9I3ukCKBADOnkjOY5dN1GEBi/+P62viJ3mIr c1yyLP4fgNsvCva17Wk/bj8BS+cAo05JAg9P3ROs= Received: from localhost (192.168.168.10) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 22 Aug 2022 21:53:46 +0300 From: Serge Semin To: Gustavo Pimentel , Vinod Koul , Rob Herring , Bjorn Helgaas , Lorenzo Pieralisi , 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?= , , , Subject: [PATCH RESEND v5 00/24] dmaengine: dw-edma: Add RP/EP local DMA controllers support Date: Mon, 22 Aug 2022 21:53:08 +0300 Message-ID: <20220822185332.26149-1-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 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 v5] PCI: dwc: Add generic resources and Baikal-T1 support Link: https://lore.kernel.org/linux-pci/20220822184701.25246-1-Sergey.Semin@baikalelectronics.ru/ [4: Done v5] 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. Nothing prevents them from being reviewed synchronously though. Please note originally this series was self content, but due to Frank being a bit faster in his work submission I had to rebase my patchset onto his one. So now this patchset turns to be dependent on the Frank' work: Link: https://lore.kernel.org/linux-pci/20220524152159.2370739-1-Frank.Li@nxp.com/ 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. Signed-off-by: Serge Semin Reviewed-by: Manivannan Sadhasivam Acked-By: Vinod Koul Cc: Alexey Malahov Cc: Pavel Parkhomenko Cc: "Krzysztof Wilczyński" 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 | 216 +++++----- 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, 583 insertions(+), 356 deletions(-) Tested-by: Manivannan Sadhasivam