From patchwork Sat Feb 10 01:26:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 13552042 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 992A94414; Sat, 10 Feb 2024 01:26:58 +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=1707528418; cv=none; b=nUuOmwtlP+w395itsfv62kr5MFbkE6A1SAQK1yMO7J7GX4AlprLapSmCQe/7LcHNFK8SJj4457MGiG48Zy3pO1AOj+WjjtNfIAXn5bWwP6XZpHlJ8VRqtqF6yehKTW6wpNYJvRyHtWBjU1srKxrRa6+6j5q8ddlQ9AOxERc7y0k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707528418; c=relaxed/simple; bh=ZbSoZXx/9HDBf8DsNqbS8trxVTS30KxSnV3BsPNQp3k=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ZFMaxO+f8Y6iO1uFcdXNHFxBI8Ud8vWzgUiC1Vo3n2BIAFVtKZwh7818Q5kp7BP1eo1xS8XtAeZpFO+ma3kEqotubkimdV/VwK9rDjSw1e+b3cOfmXmknbmfzxhrB8i3pJltUEgtPIoKS7DVjmk1EBKi47pYn5kamFYbw3k5HvE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uP/nY3bJ; 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="uP/nY3bJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B8D5C433C7; Sat, 10 Feb 2024 01:26:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707528418; bh=ZbSoZXx/9HDBf8DsNqbS8trxVTS30KxSnV3BsPNQp3k=; h=From:To:Cc:Subject:Date:From; b=uP/nY3bJB+/VTamjus0HHPCwu+bMefQIk78SOUwKphz3+gWiLnNZ4DakrWJNSDx2O VTaU1OxpBh4Fd/KtZ/2pjL1q+TKDtJUf8zOpHrKnjwejf9chfYQoZVkUAXZhKzAIfu SDsy166t5sAGJfNCF1XfXPzm5tVktGrse6iCTgqRp5bo3wt8aQePan4sr1nAzLc/uc edCfP+fu0w8DPgThvXuOXR80kthoHTXbhU40CJP3tCwQNP/qI51uex6hw93abDldML HebBcWwW1alYdWU39xT8wSx8JXVAASlK1C5I7HzfBtF8ISK3R54aY/5uWJ0lpqRKAd onWTuotlmiQIQ== 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 0/2] PCI endpoint BAR hardware description cleanup Date: Sat, 10 Feb 2024 02:26:24 +0100 Message-ID: <20240210012634.600301-1-cassel@kernel.org> X-Mailer: git-send-email 2.43.0 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. (Oh, and as you can probably guess, I will be sending out a patch series that adds BAR_RESIZABLE to enum pci_epc_bar_type in the coming week(s).) Kind regards, Niklas 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 | 38 ++++++++++++++++--- 14 files changed, 105 insertions(+), 58 deletions(-) Reviewed-by: Kishon Vijay Abraham I