From patchwork Mon Jul 15 17:33:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam via B4 Relay X-Patchwork-Id: 13733720 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 004AC5EE97; Mon, 15 Jul 2024 17:33:49 +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=1721064830; cv=none; b=ojzdhOdpX6+B2LQSzc0nhkaG5G/clfVBpnDzjd9PYYql6mD1NLcJGn/Eav6W6SFnZbSQaWYz34DO0uc5mh0SnhJ9FWRXBWzE0xB+vBs/UXO2Mb/HtelrPgGwF8ZWdimFpSbgI2B6T+083a7Qgo/J7WhuUGPIrT93+O097hf8Psk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721064830; c=relaxed/simple; bh=AqLKtDzeOWTpfLlD5Nunw5Lx2M3YMLzkFuSgYFTXBK0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=DfSrcdG0C21S+D96Q8kDl4jHZ4DM8cJ2W9v+jpzJjHzU1iKkXcvoznQ8p8hCrZn4mEuFNxZa1RukwCQ2DWIXYPJsnSHpoNobdhDeOAVZ+3m7o3KK+uVsWjIYUO30g4JJWl/7RsZhG6aEPLLtrMddtRU9cBj+C9iyxPwayfz4d3w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Cz8UW8mr; 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="Cz8UW8mr" Received: by smtp.kernel.org (Postfix) with ESMTPS id AFCCFC4AF68; Mon, 15 Jul 2024 17:33:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1721064829; bh=AqLKtDzeOWTpfLlD5Nunw5Lx2M3YMLzkFuSgYFTXBK0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=Cz8UW8mrn7ilYlUyn/ZEjHnPBbOTbPqmvtEZOEMr0dxoJvZ9/8fIMn8y8VfzPR/nD oKQ7YmIxp281g9QGtVH0EeO+omxQ/AqDv3KJYXLbIiW5GlhzvSSfwHdS1PycRGNW7T rd5QvH4vOwgdI6Cm/Hlibkm2Pqjj1VoBFcQoDLNTAJpUlQexYq7ncADIhpduaUp8IL mu+4VCX4zsIYUjWjonIqDWBnL/6yJ4kEycvP59oX7knbN/hGeLT0eHqPyZ6bewqslF CNZZMdYGYSPLsD4M4VVlSHBuJEXQ9ebGpRjTiDMniwlDpMrGlPao/OENZ7ZZo74jaH Wny2zli0OjYHA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id A371EC3DA4A; Mon, 15 Jul 2024 17:33:49 +0000 (UTC) From: Manivannan Sadhasivam via B4 Relay Date: Mon, 15 Jul 2024 23:03:48 +0530 Subject: [PATCH 06/14] PCI: endpoint: Assign PCI domain number for endpoint controllers Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240715-pci-qcom-hotplug-v1-6-5f3765cc873a@linaro.org> References: <20240715-pci-qcom-hotplug-v1-0-5f3765cc873a@linaro.org> In-Reply-To: <20240715-pci-qcom-hotplug-v1-0-5f3765cc873a@linaro.org> To: Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Rob Herring , Bjorn Helgaas , Krzysztof Kozlowski , Conor Dooley , Kishon Vijay Abraham I , Bjorn Andersson , Konrad Dybcio Cc: linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Manivannan Sadhasivam X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=2371; i=manivannan.sadhasivam@linaro.org; h=from:subject:message-id; bh=BECkU4Os6kOoCK6Qfv68t/qW5FxIjT+Q5kndhCEtOC8=; b=owEBbQGS/pANAwAKAVWfEeb+kc71AcsmYgBmlV15F+kcwS5+/FEQPBlLHWbPgXesdW/M72MTi jRCb9LZ6RqJATMEAAEKAB0WIQRnpUMqgUjL2KRYJ5dVnxHm/pHO9QUCZpVdeQAKCRBVnxHm/pHO 9RpyCACSS3TlQfGlFVAKsoeJSe8dQG6CTaoBm5QHJxDiod8PIj9/kepgh3unKrlSjKH3NrHA8LW T3mT1GOAXHTeIculrZKZ2LCZSTWEWutKG/mDGXR3oNv2GC5E2EY5cF32Yrwd/RMWpHG0vuKkrpx yKjDMh3zTPOZDOzDIPe1F27RsgmoQVqgxdk9+DwrluZJjz9eXfKaWj76Axnupy6Nc1TPRFbhO53 6zbJvq121HlgtYIRoChhSY0o7vopBiQk74jL4WKtUgZzh336aWq2cUi9+7mjkNaB9zRIV13FAGZ jWFYl5ADIqCZIGgQKl6raghKvnk0G5DqL7/UB1lI+BkxYv7W X-Developer-Key: i=manivannan.sadhasivam@linaro.org; a=openpgp; fpr=C668AEC3C3188E4C611465E7488550E901166008 X-Endpoint-Received: by B4 Relay for manivannan.sadhasivam@linaro.org/default with auth_id=185 X-Original-From: Manivannan Sadhasivam Reply-To: manivannan.sadhasivam@linaro.org From: Manivannan Sadhasivam Right now, PCI endpoint subsystem doesn't assign PCI domain number for the PCI endpoint controllers. But this domain number could be useful to the EPC drivers to uniquely identify each controller based on the hardware instance when there are multiple ones present in an SoC (even multiple RC/EP). So let's make use of the existing pci_bus_find_domain_nr() API to allocate domain numbers based on either Devicetree (linux,pci-domain) property or dynamic domain number allocation scheme. It should be noted that the domain number allocated by this API will be based on both RC and EP controllers in a SoC. If the 'linux,pci-domain' DT property is present, then the domain number represents the actual hardware instance of the PCI endpoint controller. If not, then the domain number will be allocated based on the PCI EP/RC controller probe order. Signed-off-by: Manivannan Sadhasivam --- drivers/pci/endpoint/pci-epc-core.c | 1 + include/linux/pci-epc.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 84309dfe0c68..7e8bf4ac003a 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -899,6 +899,7 @@ __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops, epc->dev.parent = dev; epc->dev.release = pci_epc_release; epc->ops = ops; + epc->domain_nr = pci_bus_find_domain_nr(NULL, dev); ret = dev_set_name(&epc->dev, "%s", dev_name(dev)); if (ret) diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 85bdf2adb760..8e3dcac55dcd 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -128,6 +128,7 @@ struct pci_epc_mem { * @group: configfs group representing the PCI EPC device * @lock: mutex to protect pci_epc ops * @function_num_map: bitmap to manage physical function number + * @domain_nr: PCI domain number of the endpoint controller * @init_complete: flag to indicate whether the EPC initialization is complete * or not */ @@ -145,6 +146,7 @@ struct pci_epc { /* mutex to protect against concurrent access of EP controller */ struct mutex lock; unsigned long function_num_map; + int domain_nr; bool init_complete; };