diff options
| author | Lorenzo Pieralisi <lpieralisi@kernel.org> | 2026-01-15 10:50:48 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-01-27 15:31:42 +0100 |
| commit | a08df2fbba47be20b5769b054d9a19ddee567bdc (patch) | |
| tree | e44f6d46bd1e650e805b7c1814e3778ce8e2ce52 /drivers | |
| parent | 0323897a88afd4ddb3d44cd6b1b33ccd6a4b76cb (diff) | |
PCI/MSI: Make the pci_msi_map_rid_ctlr_node() interface firmware agnostic
To support booting with OF and ACPI seamlessly, GIC ITS parent code
requires the PCI/MSI irqdomain layer to implement a function to retrieve
an MSI controller fwnode and map an RID in a firmware agnostic way
(ie pci_msi_map_rid_ctlr_node()).
Convert pci_msi_map_rid_ctlr_node() to an OF agnostic interface
(fwnode_handle based) and update the GIC ITS MSI parent code to reflect
the pci_msi_map_rid_ctlr_node() change.
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260115-gicv5-host-acpi-v3-2-c13a9a150388@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/irqchip/irq-gic-its-msi-parent.c | 8 | ||||
| -rw-r--r-- | drivers/pci/msi/irqdomain.c | 21 |
2 files changed, 20 insertions, 9 deletions
diff --git a/drivers/irqchip/irq-gic-its-msi-parent.c b/drivers/irqchip/irq-gic-its-msi-parent.c index 12f45228c867..4d1ad1ee005d 100644 --- a/drivers/irqchip/irq-gic-its-msi-parent.c +++ b/drivers/irqchip/irq-gic-its-msi-parent.c @@ -104,7 +104,7 @@ static int its_pci_msi_prepare(struct irq_domain *domain, struct device *dev, static int its_v5_pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec, msi_alloc_info_t *info) { - struct device_node *msi_node = NULL; + struct fwnode_handle *msi_node = NULL; struct msi_domain_info *msi_info; struct pci_dev *pdev; phys_addr_t pa; @@ -116,15 +116,15 @@ static int its_v5_pci_msi_prepare(struct irq_domain *domain, struct device *dev, pdev = to_pci_dev(dev); - rid = pci_msi_map_rid_ctlr_node(pdev, &msi_node); + rid = pci_msi_map_rid_ctlr_node(domain->parent, pdev, &msi_node); if (!msi_node) return -ENODEV; - ret = its_translate_frame_address(msi_node, &pa); + ret = its_translate_frame_address(to_of_node(msi_node), &pa); if (ret) return -ENODEV; - of_node_put(msi_node); + fwnode_handle_put(msi_node); /* ITS specific DeviceID */ info->scratchpad[0].ul = rid; diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c index a329060287b5..3a4038640fda 100644 --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -376,23 +376,34 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev) } /** - * pci_msi_map_rid_ctlr_node - Get the MSI controller node and MSI requester id (RID) + * pci_msi_map_rid_ctlr_node - Get the MSI controller fwnode_handle and MSI requester id (RID) + * @domain: The interrupt domain * @pdev: The PCI device - * @node: Pointer to store the MSI controller device node + * @node: Pointer to store the MSI controller fwnode_handle * - * Use the firmware data to find the MSI controller node for @pdev. + * Use the firmware data to find the MSI controller fwnode_handle for @pdev. * If found map the RID and initialize @node with it. @node value must * be set to NULL on entry. * * Returns: The RID. */ -u32 pci_msi_map_rid_ctlr_node(struct pci_dev *pdev, struct device_node **node) +u32 pci_msi_map_rid_ctlr_node(struct irq_domain *domain, struct pci_dev *pdev, + struct fwnode_handle **node) { u32 rid = pci_dev_id(pdev); pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); - return of_msi_xlate(&pdev->dev, node, rid); + /* Check whether the domain fwnode is an OF node */ + if (irq_domain_get_of_node(domain)) { + struct device_node *msi_ctlr_node = NULL; + + rid = of_msi_xlate(&pdev->dev, &msi_ctlr_node, rid); + if (msi_ctlr_node) + *node = of_fwnode_handle(msi_ctlr_node); + } + + return rid; } /** |