From patchwork Tue Jun 16 20:55:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jim Quinlan X-Patchwork-Id: 1310705 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=broadcom.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=broadcom.com header.i=@broadcom.com header.a=rsa-sha256 header.s=dkimrelay header.b=PaTfaUqc; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49mgVP2zFwz9sTC for ; Wed, 17 Jun 2020 06:56:45 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729252AbgFPUzu (ORCPT ); Tue, 16 Jun 2020 16:55:50 -0400 Received: from rnd-relay.smtp.broadcom.com ([192.19.229.170]:33798 "EHLO rnd-relay.smtp.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726296AbgFPUzs (ORCPT ); Tue, 16 Jun 2020 16:55:48 -0400 Received: from mail-irv-17.broadcom.com (mail-irv-17.lvn.broadcom.net [10.75.242.48]) by rnd-relay.smtp.broadcom.com (Postfix) with ESMTP id E5B9C30D887; Tue, 16 Jun 2020 13:55:46 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 rnd-relay.smtp.broadcom.com E5B9C30D887 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1592340946; bh=rfno4F7HiS8LiAdPYLi+a1WYnEQJIb94Ut0WyA5KWcI=; h=From:To:Cc:Subject:Date:From; b=PaTfaUqcmDwD6JrrdtOJDGj9AieSbSy5n5dCRm4ofxbYKITAcKCxA9ctasj8YUusH TyjbXiyk+Aq2DTfX53E9ixj4JZKhzXlPbmZxcTqfxrcVqnwhdP8sElx8kNXEY071cq J6KOs/AtEwzC3fMmHmYu+sU+qanIY7yhUFU0Q2Ms= Received: from stbsrv-and-01.and.broadcom.net (stbsrv-and-01.and.broadcom.net [10.28.16.211]) by mail-irv-17.broadcom.com (Postfix) with ESMTP id 64A55140069; Tue, 16 Jun 2020 13:55:43 -0700 (PDT) From: Jim Quinlan To: linux-pci@vger.kernel.org, Christoph Hellwig , Nicolas Saenz Julienne , bcm-kernel-feedback-list@broadcom.com, james.quinlan@broadcom.com Cc: Alan Stern , Andy Shevchenko , Arnd Bergmann , Corey Minyard , devel@driverdev.osuosl.org (open list:STAGING SUBSYSTEM), devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE), dri-devel@lists.freedesktop.org (open list:DRM DRIVERS FOR ALLWINNER A10), Florian Fainelli , Greg Kroah-Hartman , Hans de Goede , "H. Peter Anvin" , iommu@lists.linux-foundation.org (open list:IOMMU DRIVERS), Jens Axboe , Julien Grall , linux-acpi@vger.kernel.org (open list:ACPI FOR ARM64 (ACPI/arm64)), linux-arm-kernel@lists.infradead.org (moderated list:ARM PORT), linux-ide@vger.kernel.org (open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)), linux-kernel@vger.kernel.org (open list), linux-media@vger.kernel.org (open list:ALLWINNER A10 CSI DRIVER), linux-remoteproc@vger.kernel.org (open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM), linux-rpi-kernel@lists.infradead.org (moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE), linux-sh@vger.kernel.org (open list:SUPERH), linux-usb@vger.kernel.org (open list:USB SUBSYSTEM), Oliver Neukum , "Rafael J. Wysocki" , Rob Herring , Robin Murphy , Saravana Kannan , Stefano Stabellini , Suzuki K Poulose , Ulf Hansson , Wolfram Sang Subject: [PATCH v5 00/12] PCI: brcmstb: enable PCIe for STB chips Date: Tue, 16 Jun 2020 16:55:07 -0400 Message-Id: <20200616205533.3513-1-james.quinlan@broadcom.com> X-Mailer: git-send-email 2.17.1 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Patchset Summary: Enhance a PCIe host controller driver. Because of its unusual design we are foced to change dev->dma_pfn_offset into a more general role allowing multiple offsets. v5: Commit "device core: Introduce multiple dma pfn offsets" -- in of/address.c: "map_size = 0" => "*map_size = 0" -- use kcalloc instead of kzalloc (AndyS) -- use PHYS_ADDR_MAX instead of "~(phys_addr_t)0" Commit "PCI: brcmstb: Set internal memory viewport sizes" -- now gives error on missing dma-ranges property. Commit "dt-bindings: PCI: Add bindings for more Brcmstb chips" -- removed "Allof:" from brcm,scb-sizes definition (RobH) All Commits: -- indentation style, use max chars 100 (AndyS) -- rebased to torvalds master v4: Commit "device core: Introduce multiple dma pfn offsets" -- of_dma_get_range() does not take a dev param but instead takes two "out" params: map and map_size. We do this so that the code that parses dma-ranges is separate from the code that modifies 'dev'. (Nicolas) -- the separate case of having a single pfn offset has been removed and is now processed by going through the map array. (Nicolas) -- move attach_uniform_dma_pfn_offset() from of/address.c to dma/mapping.c so that it does not depend on CONFIG_OF. (Nicolas) -- devm_kcalloc => devm_kzalloc (DanC) -- add/fix assignment to dev->dma_pfn_offset_map for func attach_uniform_dma_pfn_offset() (DanC, Nicolas) -- s/struct dma_pfn_offset_region/struct bus_dma_region/ (Nicolas) -- s/attach_uniform_dma_pfn_offset/dma_attach_uniform_pfn_offset/ -- s/attach_dma_pfn_offset_map/dma_attach_pfn_offset_map/ -- More use of PFN_{PHYS,DOWN,UP}. (AndyS) Commit "of: Include a dev param in of_dma_get_range()" -- this commit was sqaushed with "device core: Introduce ..." v3: Commit "device core: Introduce multiple dma pfn offsets" Commit "arm: dma-mapping: Invoke dma offset func if needed" -- The above two commits have been squashed. More importantly, the code has been modified so that the functionality for multiple pfn offsets subsumes the use of dev->dma_pfn_offset. In fact, dma_pfn_offset is removed and supplanted by dma_pfn_offset_map, which is a pointer to an array. The more common case of a uniform offset is now handled as a map with a single entry, while cases requiring multiple pfn offsets use a map with multiple entries. Code paths that used to do this: dev->dma_pfn_offset = mydrivers_pfn_offset; have been changed to do this: attach_uniform_dma_pfn_offset(dev, pfn_offset); Commit "dt-bindings: PCI: Add bindings for more Brcmstb chips" -- Add if/then clause for required props: resets, reset-names (RobH) -- Change compatible list from const to enum (RobH) -- Change list of u32-tuples to u64 (RobH) Commit "of: Include a dev param in of_dma_get_range()" -- modify of/unittests.c to add NULL param in of_dma_get_range() call. Commit "device core: Add ability to handle multiple dma offsets" -- align comment in device.h (AndyS). -- s/cpu_beg/cpu_start/ and s/dma_beg/dma_start/ in struct dma_pfn_offset_region (AndyS). v2: Commit: "device core: Add ability to handle multiple dma offsets" o Added helper func attach_dma_pfn_offset_map() in address.c (Chistoph) o Helpers funcs added to __phys_to_dma() & __dma_to_phys() (Christoph) o Added warning when multiple offsets are needed and !DMA_PFN_OFFSET_MAP o dev->dma_pfn_map => dev->dma_pfn_offset_map o s/frm/from/ for dma_pfn_offset_frm_{phys,dma}_addr() (Christoph) o In device.h: s/const void */const struct dma_pfn_offset_region */ o removed 'unlikely' from unlikely(dev->dma_pfn_offset_map) since guarded by CONFIG_DMA_PFN_OFFSET_MAP (Christoph) o Since dev->dma_pfn_offset is copied in usb/core/{usb,message}.c, now dev->dma_pfn_offset_map is copied as well. o Merged two of the DMA commits into one (Christoph). Commit "arm: dma-mapping: Invoke dma offset func if needed": o Use helper functions instead of #if CONFIG_DMA_PFN_OFFSET Other commits' changes: o Removed need for carrying of_id var in priv (Nicolas) o Commit message rewordings (Bjorn) o Commit log messages filled to 75 chars (Bjorn) o devm_reset_control_get_shared()) => devm_reset_control_get_optional_shared (Philipp) o Add call to reset_control_assert() in PCIe remove routines (Philipp) v1: This patchset expands the usefulness of the Broadcom Settop Box PCIe controller by building upon the PCIe driver used currently by the Raspbery Pi. Other forms of this patchset were submitted by me years ago and not accepted; the major sticking point was the code required for the DMA remapping needed for the PCIe driver to work [1]. There have been many changes to the DMA and OF subsystems since that time, making a cleaner and less intrusive patchset possible. This patchset implements a generalization of "dev->dma_pfn_offset", except that instead of a single scalar offset it provides for multiple offsets via a function which depends upon the "dma-ranges" property of the PCIe host controller. This is required for proper functionality of the BrcmSTB PCIe controller and possibly some other devices. [1] https://lore.kernel.org/linux-arm-kernel/1516058925-46522-5-git-send-email-jim2101024@gmail.com/ Jim Quinlan (12): PCI: brcmstb: PCIE_BRCMSTB depends on ARCH_BRCMSTB ata: ahci_brcm: Fix use of BCM7216 reset controller dt-bindings: PCI: Add bindings for more Brcmstb chips PCI: brcmstb: Add bcm7278 register info PCI: brcmstb: Add suspend and resume pm_ops PCI: brcmstb: Add bcm7278 PERST support PCI: brcmstb: Add control of rescal reset device core: Introduce multiple dma pfn offsets PCI: brcmstb: Set internal memory viewport sizes PCI: brcmstb: Accommodate MSI for older chips PCI: brcmstb: Set bus max burst size by chip type PCI: brcmstb: Add bcm7211, bcm7216, bcm7445, bcm7278 to match list .../bindings/pci/brcm,stb-pcie.yaml | 56 ++- arch/arm/include/asm/dma-mapping.h | 9 +- arch/arm/mach-keystone/keystone.c | 8 +- arch/sh/drivers/pci/pcie-sh7786.c | 3 +- arch/sh/kernel/dma-coherent.c | 14 +- arch/x86/pci/sta2x11-fixup.c | 7 +- drivers/acpi/arm64/iort.c | 4 +- drivers/ata/ahci_brcm.c | 11 +- drivers/gpu/drm/sun4i/sun4i_backend.c | 5 +- drivers/iommu/io-pgtable-arm.c | 2 +- .../platform/sunxi/sun4i-csi/sun4i_csi.c | 5 +- .../platform/sunxi/sun6i-csi/sun6i_csi.c | 4 +- drivers/of/address.c | 71 ++- drivers/of/device.c | 19 +- drivers/of/of_private.h | 11 +- drivers/of/unittest.c | 8 +- drivers/pci/controller/Kconfig | 3 +- drivers/pci/controller/pcie-brcmstb.c | 403 +++++++++++++++--- drivers/remoteproc/remoteproc_core.c | 2 +- .../staging/media/sunxi/cedrus/cedrus_hw.c | 7 +- drivers/usb/core/message.c | 4 +- drivers/usb/core/usb.c | 2 +- include/linux/device.h | 4 +- include/linux/dma-direct.h | 14 +- include/linux/dma-mapping.h | 38 ++ kernel/dma/coherent.c | 11 +- kernel/dma/mapping.c | 39 ++ 27 files changed, 632 insertions(+), 132 deletions(-)