linux-kernel - [PATCH 1/2] PCI: host-generic: Allow {en,dis}able_device() to be provided via pci_ecam

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Message-Id: <20241204150145.800408-2-maz@kernel.org>
Date: Wed,  4 Dec 2024 15:01:44 +0000
From: Marc Zyngier <maz@...nel.org>
To: linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Alyssa Rosenzweig <alyssa@...enzweig.io>,
	Frank Li <Frank.Li@....com>
Subject: [PATCH 1/2] PCI: host-generic: Allow {en,dis}able_device() to be provided via pci_ecam_ops

In order to let host controller drivers using the host-generic
infrastructure use the {en,dis}able_device() callbacks that can
be used to configure sideband RID mapping hardware, provide these
two callbacks as part of the pci_ecap_ops structure.

Signed-off-by: Marc Zyngier <maz@...nel.org>
---
 drivers/pci/controller/pci-host-common.c | 2 ++
 include/linux/pci-ecam.h                 | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/pci/controller/pci-host-common.c b/drivers/pci/controller/pci-host-common.c
index cf5f59a745b37..f441bfd6f96a8 100644
--- a/drivers/pci/controller/pci-host-common.c
+++ b/drivers/pci/controller/pci-host-common.c
@@ -75,6 +75,8 @@ int pci_host_common_probe(struct platform_device *pdev)
 
 	bridge->sysdata = cfg;
 	bridge->ops = (struct pci_ops *)&ops->pci_ops;
+	bridge->enable_device = ops->enable_device;
+	bridge->disable_device = ops->disable_device;
 	bridge->msi_domain = true;
 
 	return pci_host_probe(bridge);
diff --git a/include/linux/pci-ecam.h b/include/linux/pci-ecam.h
index 3a4860bd27586..3a10f8cfc3ad5 100644
--- a/include/linux/pci-ecam.h
+++ b/include/linux/pci-ecam.h
@@ -45,6 +45,10 @@ struct pci_ecam_ops {
 	unsigned int			bus_shift;
 	struct pci_ops			pci_ops;
 	int				(*init)(struct pci_config_window *);
+	int				(*enable_device)(struct pci_host_bridge *,
+							 struct pci_dev *);
+	void				(*disable_device)(struct pci_host_bridge *,
+							  struct pci_dev *);
 };
 
 /*
-- 
2.39.2