static struct irq_chip xen_percpu_chip;
static struct irq_chip xen_pirq_chip;
-/* Constructor for packed IRQ information. */
-static struct irq_info mk_unbound_info(void)
+/* Get info for IRQ */
+static struct irq_info *info_for_irq(unsigned irq)
{
- return (struct irq_info) { .type = IRQT_UNBOUND };
+ return irq_get_handler_data(irq);
}
-static struct irq_info mk_evtchn_info(unsigned short evtchn)
+/* Constructors for packed IRQ information. */
+static void xen_irq_info_common_init(struct irq_info *info,
+ unsigned irq,
+ enum xen_irq_type type,
+ unsigned short evtchn,
+ unsigned short cpu)
{
- return (struct irq_info) { .type = IRQT_EVTCHN, .evtchn = evtchn,
- .cpu = 0 };
+
+ BUG_ON(info->type != IRQT_UNBOUND && info->type != type);
+
+ info->type = type;
+ info->irq = irq;
+ info->evtchn = evtchn;
+ info->cpu = cpu;
+
+ evtchn_to_irq[evtchn] = irq;
}
-static struct irq_info mk_ipi_info(unsigned short evtchn, enum ipi_vector ipi)
+static void xen_irq_info_evtchn_init(unsigned irq,
+ unsigned short evtchn)
{
- return (struct irq_info) { .type = IRQT_IPI, .evtchn = evtchn,
- .cpu = 0, .u.ipi = ipi };
+ struct irq_info *info = info_for_irq(irq);
+
+ xen_irq_info_common_init(info, irq, IRQT_EVTCHN, evtchn, 0);
}
-static struct irq_info mk_virq_info(unsigned short evtchn, unsigned short virq)
+static void xen_irq_info_ipi_init(unsigned cpu,
+ unsigned irq,
+ unsigned short evtchn,
+ enum ipi_vector ipi)
{
- return (struct irq_info) { .type = IRQT_VIRQ, .evtchn = evtchn,
- .cpu = 0, .u.virq = virq };
+ struct irq_info *info = info_for_irq(irq);
+
+ xen_irq_info_common_init(info, irq, IRQT_IPI, evtchn, 0);
+
+ info->u.ipi = ipi;
+
+ per_cpu(ipi_to_irq, cpu)[ipi] = irq;
}
-static struct irq_info mk_pirq_info(unsigned short evtchn, unsigned short pirq,
- unsigned short gsi, unsigned short vector)
+static void xen_irq_info_virq_init(unsigned cpu,
+ unsigned irq,
+ unsigned short evtchn,
+ unsigned short virq)
{
- return (struct irq_info) { .type = IRQT_PIRQ, .evtchn = evtchn,
- .cpu = 0,
- .u.pirq = { .pirq = pirq, .gsi = gsi, .vector = vector } };
+ struct irq_info *info = info_for_irq(irq);
+
+ xen_irq_info_common_init(info, irq, IRQT_VIRQ, evtchn, 0);
+
+ info->u.virq = virq;
+
+ per_cpu(virq_to_irq, cpu)[virq] = irq;
}
-/*
- * Accessors for packed IRQ information.
- */
-static struct irq_info *info_for_irq(unsigned irq)
+static void xen_irq_info_pirq_init(unsigned irq,
+ unsigned short evtchn,
+ unsigned short pirq,
+ unsigned short gsi,
+ unsigned short vector,
+ + uint16_t domid,
+ unsigned char flags)
{
- return &irq_info[irq];
+ struct irq_info *info = info_for_irq(irq);
+
+ xen_irq_info_common_init(info, irq, IRQT_PIRQ, evtchn, 0);
+
+ info->u.pirq.pirq = pirq;
+ info->u.pirq.gsi = gsi;
+ info->u.pirq.vector = vector;
+ + info->u.pirq.domid = domid;
+ info->u.pirq.flags = flags;
}
+/*
+ * Accessors for packed IRQ information.
+ */
static unsigned int evtchn_from_irq(unsigned irq)
{
if (unlikely(WARN(irq < 0 || irq >= nr_irqs, "Invalid irq %d!\n", irq)))
goto out;
}
- xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector,
- irq_info[irq] = mk_pirq_info(0, pirq, gsi, irq_op.vector);
- irq_info[irq].u.pirq.flags |= shareable ? PIRQ_SHAREABLE : 0;
- pirq_to_irq[pirq] = irq;
+ + xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector, DOMID_SELF,
+ shareable ? PIRQ_SHAREABLE : 0);
out:
spin_unlock(&irq_mapping_update_lock);
}
#ifdef CONFIG_PCI_MSI
-#include <linux/msi.h>
-#include "../pci/msi.h"
-
-void xen_allocate_pirq_msi(char *name, int *irq, int *pirq, int alloc)
+int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc)
{
- spin_lock(&irq_mapping_update_lock);
-
- if (alloc & XEN_ALLOC_IRQ) {
- *irq = find_unbound_irq();
- if (*irq == -1)
- goto out;
- }
-
- if (alloc & XEN_ALLOC_PIRQ) {
- *pirq = find_unbound_pirq(MAP_PIRQ_TYPE_MSI);
- if (*pirq == -1)
- goto out;
- }
+ int rc;
+ struct physdev_get_free_pirq op_get_free_pirq;
- set_irq_chip_and_handler_name(*irq, &xen_pirq_chip,
- handle_level_irq, name);
+ op_get_free_pirq.type = MAP_PIRQ_TYPE_MSI;
+ rc = HYPERVISOR_physdev_op(PHYSDEVOP_get_free_pirq, &op_get_free_pirq);
- irq_info[*irq] = mk_pirq_info(0, *pirq, 0, 0);
- pirq_to_irq[*pirq] = *irq;
+ WARN_ONCE(rc == -ENOSYS,
+ "hypervisor does not support the PHYSDEVOP_get_free_pirq interface\n");
-out:
- spin_unlock(&irq_mapping_update_lock);
+ return rc ? -1 : op_get_free_pirq.pirq;
}
-int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type)
+int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
- int pirq, int vector, const char *name)
+ + int pirq, int vector, const char *name,
+ + domid_t domid)
{
- int irq = -1;
- struct physdev_map_pirq map_irq;
- int rc;
- int pos;
- u32 table_offset, bir;
-
- memset(&map_irq, 0, sizeof(map_irq));
- map_irq.domid = DOMID_SELF;
- map_irq.type = MAP_PIRQ_TYPE_MSI;
- map_irq.index = -1;
- map_irq.pirq = -1;
- map_irq.bus = dev->bus->number;
- map_irq.devfn = dev->devfn;
-
- if (type == PCI_CAP_ID_MSIX) {
- pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
-
- pci_read_config_dword(dev, msix_table_offset_reg(pos),
- &table_offset);
- bir = (u8)(table_offset & PCI_MSIX_FLAGS_BIRMASK);
-
- map_irq.table_base = pci_resource_start(dev, bir);
- map_irq.entry_nr = msidesc->msi_attrib.entry_nr;
- }
+ int irq, ret;
spin_lock(&irq_mapping_update_lock);
if (irq == -1)
goto out;
- rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
- if (rc) {
- printk(KERN_WARNING "xen map irq failed %d\n", rc);
-
- irq_free_desc(irq);
-
- irq = -1;
- goto out;
- }
- irq_info[irq] = mk_pirq_info(0, map_irq.pirq, 0, map_irq.index);
-
- set_irq_chip_and_handler_name(irq, &xen_pirq_chip,
- handle_level_irq,
- (type == PCI_CAP_ID_MSIX) ? "msi-x":"msi");
+ irq_set_chip_and_handler_name(irq, &xen_pirq_chip, handle_level_irq,
+ name);
- xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, 0);
+ + xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, domid, 0);
+ ret = irq_set_msi_desc(irq, msidesc);
+ if (ret < 0)
+ goto error_irq;
out:
spin_unlock(&irq_mapping_update_lock);
return irq;
return rc;
}
-int xen_vector_from_irq(unsigned irq)
+int xen_irq_from_pirq(unsigned pirq)
{
- return vector_from_irq(irq);
-}
+ int irq;
-int xen_gsi_from_irq(unsigned irq)
-{
- return gsi_from_irq(irq);
+ struct irq_info *info;
+
+ spin_lock(&irq_mapping_update_lock);
+
+ list_for_each_entry(info, &xen_irq_list_head, list) {
+ if (info == NULL || info->type != IRQT_PIRQ)
+ continue;
+ irq = info->irq;
+ if (info->u.pirq.pirq == pirq)
+ goto out;
+ }
+ irq = -1;
+out:
+ spin_unlock(&irq_mapping_update_lock);
+
+ return irq;
}
-int xen_irq_from_pirq(unsigned pirq)
+ +
+ +int xen_pirq_from_irq(unsigned irq)
+ {
- return pirq_to_irq[pirq];
+ + return pirq_from_irq(irq);
+ }
-
+ +EXPORT_SYMBOL_GPL(xen_pirq_from_irq);
int bind_evtchn_to_irq(unsigned int evtchn)
{
int irq;
unsigned long irqflags,
const char *devname, void *dev_id)
{
-- unsigned int irq;
-- int retval;
++ int irq, retval;
irq = bind_evtchn_to_irq(evtchn);
+ if (irq < 0)
+ return irq;
retval = request_irq(irq, handler, irqflags, devname, dev_id);
if (retval != 0) {
unbind_from_irq(irq);
irq_handler_t handler,
unsigned long irqflags, const char *devname, void *dev_id)
{
-- unsigned int irq;
-- int retval;
++ int irq, retval;
irq = bind_virq_to_irq(virq, cpu);
+ if (irq < 0)
+ return irq;
retval = request_irq(irq, handler, irqflags, devname, dev_id);
if (retval != 0) {
unbind_from_irq(irq);
xen_poll_irq_timeout(irq, 0 /* no timeout */);
}
+ +/* Check whether the IRQ line is shared with other guests. */
+ +int xen_test_irq_shared(int irq)
+ +{
+ + struct irq_info *info = info_for_irq(irq);
+ + struct physdev_irq_status_query irq_status = { .irq = info->u.pirq.pirq };
+ +
+ + if (HYPERVISOR_physdev_op(PHYSDEVOP_irq_status_query, &irq_status))
+ + return 0;
+ + return !(irq_status.flags & XENIRQSTAT_shared);
+ +}
+ +EXPORT_SYMBOL_GPL(xen_test_irq_shared);
+ +
void xen_irq_resume(void)
{
- unsigned int cpu, irq, evtchn;
- struct irq_desc *desc;
+ unsigned int cpu, evtchn;
+ struct irq_info *info;
init_evtchn_cpu_bindings();
projects / platform / kernel / linux-rpi.git / commitdiff