From patchwork Fri Feb 16 13:45:13 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13560026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B904A12BEA7; Fri, 16 Feb 2024 13:45:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708091141; cv=none; b=Uvl4r9FVZED+CbqBZwlkm87He2aZWFRVmpptUduwnH1/QtPo/yfhcT7JPqRV4JzLrHU124jbA0L2z9SpF8gd2W3N1SklD5ayILSUlbWRwpHmB/cByTAt1w/TZAQHE8yEIjrReouq/fdK1nUuCSfcRUxGU79ivlI+sSZLMn/yUIY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708091141; c=relaxed/simple; bh=3+uLhQPpkXwAKjU+MV8grUAf3CHFA4l3wtq8PHKqC6U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=kxtLF6DXv2YuIWeCoq0hRF0kL5+DaCBZZeS55E/Xt9DODZedqu+Tqxa0C/HyF3UddR5JjZuHnefVUgR/ZzRU0qgwGiVEHK0L3NE0VNQm/95NiUGXn/ZUAi8C+AJWudBEpc2vuKJ60PzvVc2ckMrbHHs/WICjHpLkN2prMlfZAA0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=auOWFVNc; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="auOWFVNc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B345DC43390; Fri, 16 Feb 2024 13:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708091141; bh=3+uLhQPpkXwAKjU+MV8grUAf3CHFA4l3wtq8PHKqC6U=; h=From:To:Cc:Subject:Date:From; b=auOWFVNcECCiHJDP5ntf+mZ4HtcqIODShCx6lpTdy5HBAsp/avpL9P6wsFYRSigVC tym7z2E3dfs2VpGnZBQJqicT+6Wgi8EmmvCklxbIgA9JeG/zRejrliD4yaUFarTj0j YTnP/nkVz3JsDv7zGy4QO08SHLCt2mpaO9OlMGf2+cNwWcAE9o2n+OyLJagZOzdhxF fmdiirhjrmrPaH+lPn40vxk3oBiWr2imQZdYEttiRADZSPYml9z6Mr/hK4dDzeIe/A ngX+i8P54dQsugqIrf/0+0Xu5A2isII+EePZJ4DPzjbeVphUyDMtUvk6/9aZ6EsuSV lvy/KYHkC7Nrg== From: Niklas Cassel To: Richard Zhu , Lucas Stach , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Minghuan Lian , Mingkai Hu , Roy Zang , Srikanth Thokala , Marek Vasut , Yoshihiro Shimoda , Thierry Reding , Jonathan Hunter , Kunihiko Hayashi , Masami Hiramatsu , Jon Mason , Dave Jiang , Allen Hubbe , Manivannan Sadhasivam , Kishon Vijay Abraham I Cc: Damien Le Moal , Frank Li , Niklas Cassel , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-renesas-soc@vger.kernel.org, linux-tegra@vger.kernel.org, ntb@lists.linux.dev Subject: [PATCH v2 0/2] PCI endpoint BAR hardware description cleanup Date: Fri, 16 Feb 2024 14:45:13 +0100 Message-ID: <20240216134524.1142149-1-cassel@kernel.org> X-Mailer: git-send-email 2.43.1 Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The series is based on top of: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=endpoint Hello all, This series cleans up the hardware description for PCI endpoint BARs. The problems with the existing hardware description: -The documentation is lackluster. -Some of the names are confusingly similar, e.g. fixed_64bit and fixed_size, even though these are for completely unrelated things. -The way that the BARs are defined in the endpoint controller drivers is messy, because the left hand side is not a BAR, so you can mark a BAR as e.g. both fixed size and reserved. This series tries to address all the problems above. Personally, I think that the code is more readable, both the endpoint controller drivers, but also pci-epc-core.c. (I will be sending out a patch series that adds BAR_RESIZABLE to enum pci_epc_bar_type in the coming week.) Kind regards, Niklas Changes since V1: -Picked up tags from Kishon and Mani. -Improved commit message for patch 1/2 as suggested by Mani. -Improved kdoc in patch 2/2 as suggested by Mani. Niklas Cassel (2): PCI: endpoint: Clean up hardware description for BARs PCI: endpoint: Drop only_64bit on reserved BARs drivers/pci/controller/dwc/pci-imx6.c | 3 +- drivers/pci/controller/dwc/pci-keystone.c | 12 +++--- .../pci/controller/dwc/pci-layerscape-ep.c | 5 ++- drivers/pci/controller/dwc/pcie-keembay.c | 8 +++- drivers/pci/controller/dwc/pcie-rcar-gen4.c | 4 +- drivers/pci/controller/dwc/pcie-tegra194.c | 10 +++-- drivers/pci/controller/dwc/pcie-uniphier-ep.c | 15 +++++-- drivers/pci/controller/pcie-rcar-ep.c | 14 ++++--- drivers/pci/endpoint/functions/pci-epf-ntb.c | 4 +- drivers/pci/endpoint/functions/pci-epf-test.c | 8 ++-- drivers/pci/endpoint/functions/pci-epf-vntb.c | 2 +- drivers/pci/endpoint/pci-epc-core.c | 25 +++++------- drivers/pci/endpoint/pci-epf-core.c | 15 +++---- include/linux/pci-epc.h | 39 ++++++++++++++++--- 14 files changed, 106 insertions(+), 58 deletions(-)