diff options
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 67 |
1 files changed, 60 insertions, 7 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index c7ddeeb3251a..53e463244bb7 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -20,6 +20,7 @@ #include <linux/io.h> #include <linux/slab.h> #include <linux/irqdomain.h> +#include <linux/of_irq.h> #include "pci.h" @@ -1249,11 +1250,15 @@ static void pci_msi_domain_update_chip_ops(struct msi_domain_info *info) BUG_ON(!chip); if (!chip->irq_write_msi_msg) chip->irq_write_msi_msg = pci_msi_domain_write_msg; + if (!chip->irq_mask) + chip->irq_mask = pci_msi_mask_irq; + if (!chip->irq_unmask) + chip->irq_unmask = pci_msi_unmask_irq; } /** - * pci_msi_create_irq_domain - Creat a MSI interrupt domain - * @node: Optional device-tree node of the interrupt controller + * pci_msi_create_irq_domain - Create a MSI interrupt domain + * @fwnode: Optional fwnode of the interrupt controller * @info: MSI domain info * @parent: Parent irq domain * @@ -1262,7 +1267,7 @@ static void pci_msi_domain_update_chip_ops(struct msi_domain_info *info) * Returns: * A domain pointer or NULL in case of failure. */ -struct irq_domain *pci_msi_create_irq_domain(struct device_node *node, +struct irq_domain *pci_msi_create_irq_domain(struct fwnode_handle *fwnode, struct msi_domain_info *info, struct irq_domain *parent) { @@ -1273,7 +1278,7 @@ struct irq_domain *pci_msi_create_irq_domain(struct device_node *node, if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS) pci_msi_domain_update_chip_ops(info); - domain = msi_create_irq_domain(node, info, parent); + domain = msi_create_irq_domain(fwnode, info, parent); if (!domain) return NULL; @@ -1309,14 +1314,14 @@ void pci_msi_domain_free_irqs(struct irq_domain *domain, struct pci_dev *dev) /** * pci_msi_create_default_irq_domain - Create a default MSI interrupt domain - * @node: Optional device-tree node of the interrupt controller + * @fwnode: Optional fwnode of the interrupt controller * @info: MSI domain info * @parent: Parent irq domain * * Returns: A domain pointer or NULL in case of failure. If successful * the default PCI/MSI irqdomain pointer is updated. */ -struct irq_domain *pci_msi_create_default_irq_domain(struct device_node *node, +struct irq_domain *pci_msi_create_default_irq_domain(struct fwnode_handle *fwnode, struct msi_domain_info *info, struct irq_domain *parent) { struct irq_domain *domain; @@ -1326,11 +1331,59 @@ struct irq_domain *pci_msi_create_default_irq_domain(struct device_node *node, pr_err("PCI: default irq domain for PCI MSI has already been created.\n"); domain = NULL; } else { - domain = pci_msi_create_irq_domain(node, info, parent); + domain = pci_msi_create_irq_domain(fwnode, info, parent); pci_msi_default_domain = domain; } mutex_unlock(&pci_msi_domain_lock); return domain; } + +static int get_msi_id_cb(struct pci_dev *pdev, u16 alias, void *data) +{ + u32 *pa = data; + + *pa = alias; + return 0; +} +/** + * pci_msi_domain_get_msi_rid - Get the MSI requester id (RID) + * @domain: The interrupt domain + * @pdev: The PCI device. + * + * The RID for a device is formed from the alias, with a firmware + * supplied mapping applied + * + * Returns: The RID. + */ +u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev) +{ + struct device_node *of_node; + u32 rid = 0; + + pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); + + of_node = irq_domain_get_of_node(domain); + if (of_node) + rid = of_msi_map_rid(&pdev->dev, of_node, rid); + + return rid; +} + +/** + * pci_msi_get_device_domain - Get the MSI domain for a given PCI device + * @pdev: The PCI device + * + * Use the firmware data to find a device-specific MSI domain + * (i.e. not one that is ste as a default). + * + * Returns: The coresponding MSI domain or NULL if none has been found. + */ +struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev) +{ + u32 rid = 0; + + pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); + return of_msi_map_get_device_domain(&pdev->dev, rid); +} #endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */ |