diff options
Diffstat (limited to 'arch/x86/pci/xen.c')
| -rw-r--r-- | arch/x86/pci/xen.c | 56 |
1 files changed, 43 insertions, 13 deletions
diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 56ab74989cf..905956f1646 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -162,6 +162,9 @@ static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) struct msi_desc *msidesc; int *v; + if (type == PCI_CAP_ID_MSI && nvec > 1) + return 1; + v = kzalloc(sizeof(int) * max(1, nvec), GFP_KERNEL); if (!v) return -ENOMEM; @@ -174,7 +177,8 @@ static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) goto error; i = 0; list_for_each_entry(msidesc, &dev->msi_list, list) { - irq = xen_bind_pirq_msi_to_irq(dev, msidesc, v[i], 0, + irq = xen_bind_pirq_msi_to_irq(dev, msidesc, v[i], + (type == PCI_CAP_ID_MSI) ? nvec : 1, (type == PCI_CAP_ID_MSIX) ? "pcifront-msi-x" : "pcifront-msi", @@ -220,6 +224,9 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) struct msi_desc *msidesc; struct msi_msg msg; + if (type == PCI_CAP_ID_MSI && nvec > 1) + return 1; + list_for_each_entry(msidesc, &dev->msi_list, list) { __read_msi_msg(msidesc, &msg); pirq = MSI_ADDR_EXT_DEST_ID(msg.address_hi) | @@ -238,7 +245,8 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) dev_dbg(&dev->dev, "xen: msi already bound to pirq=%d\n", pirq); } - irq = xen_bind_pirq_msi_to_irq(dev, msidesc, pirq, 0, + irq = xen_bind_pirq_msi_to_irq(dev, msidesc, pirq, + (type == PCI_CAP_ID_MSI) ? nvec : 1, (type == PCI_CAP_ID_MSIX) ? "msi-x" : "msi", DOMID_SELF); @@ -282,15 +290,17 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) (pci_domain_nr(dev->bus) << 16); map_irq.devfn = dev->devfn; - if (type == PCI_CAP_ID_MSIX) { + if (type == PCI_CAP_ID_MSI && nvec > 1) { + map_irq.type = MAP_PIRQ_TYPE_MULTI_MSI; + map_irq.entry_nr = nvec; + } else if (type == PCI_CAP_ID_MSIX) { int pos; u32 table_offset, bir; - pos = pci_find_capability(dev, PCI_CAP_ID_MSIX); - + pos = dev->msix_cap; pci_read_config_dword(dev, pos + PCI_MSIX_TABLE, &table_offset); - bir = (u8)(table_offset & PCI_MSIX_FLAGS_BIRMASK); + bir = (u8)(table_offset & PCI_MSIX_TABLE_BIR); map_irq.table_base = pci_resource_start(dev, bir); map_irq.entry_nr = msidesc->msi_attrib.entry_nr; @@ -300,6 +310,16 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) if (pci_seg_supported) ret = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq); + if (type == PCI_CAP_ID_MSI && nvec > 1 && ret) { + /* + * If MAP_PIRQ_TYPE_MULTI_MSI is not available + * there's nothing else we can do in this case. + * Just set ret > 0 so driver can retry with + * single MSI. + */ + ret = 1; + goto out; + } if (ret == -EINVAL && !pci_domain_nr(dev->bus)) { map_irq.type = MAP_PIRQ_TYPE_MSI; map_irq.index = -1; @@ -316,11 +336,10 @@ static int xen_initdom_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) goto out; } - ret = xen_bind_pirq_msi_to_irq(dev, msidesc, - map_irq.pirq, map_irq.index, - (type == PCI_CAP_ID_MSIX) ? - "msi-x" : "msi", - domid); + ret = xen_bind_pirq_msi_to_irq(dev, msidesc, map_irq.pirq, + (type == PCI_CAP_ID_MSI) ? nvec : 1, + (type == PCI_CAP_ID_MSIX) ? "msi-x" : "msi", + domid); if (ret < 0) goto out; } @@ -329,7 +348,7 @@ out: return ret; } -static void xen_initdom_restore_msi_irqs(struct pci_dev *dev, int irq) +static void xen_initdom_restore_msi_irqs(struct pci_dev *dev) { int ret = 0; @@ -374,7 +393,14 @@ static void xen_teardown_msi_irq(unsigned int irq) { xen_destroy_irq(irq); } - +static u32 xen_nop_msi_mask_irq(struct msi_desc *desc, u32 mask, u32 flag) +{ + return 0; +} +static u32 xen_nop_msix_mask_irq(struct msi_desc *desc, u32 flag) +{ + return 0; +} #endif int __init pci_xen_init(void) @@ -398,6 +424,8 @@ int __init pci_xen_init(void) x86_msi.setup_msi_irqs = xen_setup_msi_irqs; x86_msi.teardown_msi_irq = xen_teardown_msi_irq; x86_msi.teardown_msi_irqs = xen_teardown_msi_irqs; + x86_msi.msi_mask_irq = xen_nop_msi_mask_irq; + x86_msi.msix_mask_irq = xen_nop_msix_mask_irq; #endif return 0; } @@ -477,6 +505,8 @@ int __init pci_xen_initial_domain(void) x86_msi.setup_msi_irqs = xen_initdom_setup_msi_irqs; x86_msi.teardown_msi_irq = xen_teardown_msi_irq; x86_msi.restore_msi_irqs = xen_initdom_restore_msi_irqs; + x86_msi.msi_mask_irq = xen_nop_msi_mask_irq; + x86_msi.msix_mask_irq = xen_nop_msix_mask_irq; #endif xen_setup_acpi_sci(); __acpi_register_gsi = acpi_register_gsi_xen; |