@@ -46,6 +46,9 @@
#include <xen/page.h>
#include <xen/xen-ops.h>
#include <xen/balloon.h>
+#ifdef CONFIG_XEN_ACPI
+#include <xen/acpi.h>
+#endif
#include "privcmd.h"
@@ -844,6 +847,29 @@ static long privcmd_ioctl_mmap_resource(struct file *file,
return rc;
}
+static long privcmd_ioctl_pcidev_get_gsi(struct file *file, void __user *udata)
+{
+#ifdef CONFIG_XEN_ACPI
+ int rc;
+ struct privcmd_pcidev_get_gsi kdata;
+
+ if (copy_from_user(&kdata, udata, sizeof(kdata)))
+ return -EFAULT;
+
+ rc = pcistub_get_gsi_from_sbdf(kdata.sbdf);
+ if (rc < 0)
+ return rc;
+
+ kdata.gsi = rc;
+ if (copy_to_user(udata, &kdata, sizeof(kdata)))
+ return -EFAULT;
+
+ return 0;
+#else
+ return -EINVAL;
+#endif
+}
+
#ifdef CONFIG_XEN_PRIVCMD_EVENTFD
/* Irqfd support */
static struct workqueue_struct *irqfd_cleanup_wq;
@@ -1543,6 +1569,10 @@ static long privcmd_ioctl(struct file *file,
ret = privcmd_ioctl_ioeventfd(file, udata);
break;
+ case IOCTL_PRIVCMD_PCIDEV_GET_GSI:
+ ret = privcmd_ioctl_pcidev_get_gsi(file, udata);
+ break;
+
default:
break;
}
@@ -56,6 +56,9 @@ struct pcistub_device {
struct pci_dev *dev;
struct xen_pcibk_device *pdev;/* non-NULL if struct pci_dev is in use */
+#ifdef CONFIG_XEN_ACPI
+ int gsi;
+#endif
};
/* Access to pcistub_devices & seized_devices lists and the initialize_devices
@@ -88,6 +91,9 @@ static struct pcistub_device *pcistub_device_alloc(struct pci_dev *dev)
kref_init(&psdev->kref);
spin_lock_init(&psdev->lock);
+#ifdef CONFIG_XEN_ACPI
+ psdev->gsi = -1;
+#endif
return psdev;
}
@@ -220,6 +226,25 @@ static struct pci_dev *pcistub_device_get_pci_dev(struct xen_pcibk_device *pdev,
return pci_dev;
}
+#ifdef CONFIG_XEN_PCIDEV_BACKEND
+int pcistub_get_gsi_from_sbdf(unsigned int sbdf)
+{
+ struct pcistub_device *psdev;
+ int domain = (sbdf >> 16) & 0xffff;
+ int bus = PCI_BUS_NUM(sbdf);
+ int slot = PCI_SLOT(sbdf);
+ int func = PCI_FUNC(sbdf);
+
+ psdev = pcistub_device_find(domain, bus, slot, func);
+
+ if (!psdev)
+ return -ENODEV;
+
+ return psdev->gsi;
+}
+EXPORT_SYMBOL_GPL(pcistub_get_gsi_from_sbdf);
+#endif
+
struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev,
int domain, int bus,
int slot, int func)
@@ -367,14 +392,20 @@ static int pcistub_match(struct pci_dev *dev)
return found;
}
-static int pcistub_init_device(struct pci_dev *dev)
+static int pcistub_init_device(struct pcistub_device *psdev)
{
struct xen_pcibk_dev_data *dev_data;
+ struct pci_dev *dev;
#ifdef CONFIG_XEN_ACPI
int gsi, trigger, polarity;
#endif
int err = 0;
+ if (!psdev)
+ return -EINVAL;
+
+ dev = psdev->dev;
+
dev_dbg(&dev->dev, "initializing...\n");
/* The PCI backend is not intended to be a module (or to work with
@@ -452,6 +483,7 @@ static int pcistub_init_device(struct pci_dev *dev)
err = xen_pvh_setup_gsi(gsi, trigger, polarity);
if (err)
goto config_release;
+ psdev->gsi = gsi;
}
#endif
@@ -494,7 +526,7 @@ static int __init pcistub_init_devices_late(void)
spin_unlock_irqrestore(&pcistub_devices_lock, flags);
- err = pcistub_init_device(psdev->dev);
+ err = pcistub_init_device(psdev);
if (err) {
dev_err(&psdev->dev->dev,
"error %d initializing device\n", err);
@@ -564,7 +596,7 @@ static int pcistub_seize(struct pci_dev *dev,
spin_unlock_irqrestore(&pcistub_devices_lock, flags);
/* don't want irqs disabled when calling pcistub_init_device */
- err = pcistub_init_device(psdev->dev);
+ err = pcistub_init_device(psdev);
spin_lock_irqsave(&pcistub_devices_lock, flags);
@@ -126,6 +126,11 @@ struct privcmd_ioeventfd {
__u8 pad[2];
};
+struct privcmd_pcidev_get_gsi {
+ __u32 sbdf;
+ __u32 gsi;
+};
+
/*
* @cmd: IOCTL_PRIVCMD_HYPERCALL
* @arg: &privcmd_hypercall_t
@@ -157,5 +162,7 @@ struct privcmd_ioeventfd {
_IOW('P', 8, struct privcmd_irqfd)
#define IOCTL_PRIVCMD_IOEVENTFD \
_IOW('P', 9, struct privcmd_ioeventfd)
+#define IOCTL_PRIVCMD_PCIDEV_GET_GSI \
+ _IOC(_IOC_NONE, 'P', 10, sizeof(struct privcmd_pcidev_get_gsi))
#endif /* __LINUX_PUBLIC_PRIVCMD_H__ */
@@ -91,4 +91,13 @@ static inline int xen_acpi_get_gsi_info(struct pci_dev *dev,
}
#endif
+#ifdef CONFIG_XEN_PCIDEV_BACKEND
+int pcistub_get_gsi_from_sbdf(unsigned int sbdf);
+#else
+static inline int pcistub_get_gsi_from_sbdf(unsigned int sbdf)
+{
+ return -1;
+}
+#endif
+
#endif /* _XEN_ACPI_H */