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path: root/drivers/pci/msi.c
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Diffstat (limited to 'drivers/pci/msi.c')
-rw-r--r--drivers/pci/msi.c38
1 files changed, 28 insertions, 10 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 30ae4ffda5c1..d52d118979a6 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -58,8 +58,8 @@ static void pci_msi_teardown_msi_irqs(struct pci_dev *dev)
#define pci_msi_teardown_msi_irqs arch_teardown_msi_irqs
#endif
+#ifdef CONFIG_PCI_MSI_ARCH_FALLBACKS
/* Arch hooks */
-
int __weak arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
{
struct msi_controller *chip = dev->bus->msi;
@@ -132,6 +132,7 @@ void __weak arch_teardown_msi_irqs(struct pci_dev *dev)
{
return default_teardown_msi_irqs(dev);
}
+#endif /* CONFIG_PCI_MSI_ARCH_FALLBACKS */
static void default_restore_msi_irq(struct pci_dev *dev, int irq)
{
@@ -1346,14 +1347,14 @@ void pci_msi_domain_write_msg(struct irq_data *irq_data, struct msi_msg *msg)
/**
* pci_msi_domain_calc_hwirq - Generate a unique ID for an MSI source
- * @dev: Pointer to the PCI device
* @desc: Pointer to the MSI descriptor
*
* The ID number is only used within the irqdomain.
*/
-irq_hw_number_t pci_msi_domain_calc_hwirq(struct pci_dev *dev,
- struct msi_desc *desc)
+static irq_hw_number_t pci_msi_domain_calc_hwirq(struct msi_desc *desc)
{
+ struct pci_dev *dev = msi_desc_to_pci_dev(desc);
+
return (irq_hw_number_t)desc->msi_attrib.entry_nr |
pci_dev_id(dev) << 11 |
(pci_domain_nr(dev->bus) & 0xFFFFFFFF) << 27;
@@ -1401,17 +1402,12 @@ static int pci_msi_domain_handle_error(struct irq_domain *domain,
return error;
}
-#ifdef GENERIC_MSI_DOMAIN_OPS
static void pci_msi_domain_set_desc(msi_alloc_info_t *arg,
struct msi_desc *desc)
{
arg->desc = desc;
- arg->hwirq = pci_msi_domain_calc_hwirq(msi_desc_to_pci_dev(desc),
- desc);
+ arg->hwirq = pci_msi_domain_calc_hwirq(desc);
}
-#else
-#define pci_msi_domain_set_desc NULL
-#endif
static struct msi_domain_ops pci_msi_domain_ops_default = {
.set_desc = pci_msi_domain_set_desc,
@@ -1558,4 +1554,26 @@ struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev)
DOMAIN_BUS_PCI_MSI);
return dom;
}
+
+/**
+ * pci_dev_has_special_msi_domain - Check whether the device is handled by
+ * a non-standard PCI-MSI domain
+ * @pdev: The PCI device to check.
+ *
+ * Returns: True if the device irqdomain or the bus irqdomain is
+ * non-standard PCI/MSI.
+ */
+bool pci_dev_has_special_msi_domain(struct pci_dev *pdev)
+{
+ struct irq_domain *dom = dev_get_msi_domain(&pdev->dev);
+
+ if (!dom)
+ dom = dev_get_msi_domain(&pdev->bus->dev);
+
+ if (!dom)
+ return true;
+
+ return dom->bus_token != DOMAIN_BUS_PCI_MSI;
+}
+
#endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */