diff options
| author | Antonios Motakis <a.motakis@virtualopensystems.com> | 2015-03-16 14:08:49 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2015-03-16 14:08:49 -0600 |
| commit | 9a36321c8d3350c4f7befa02adf3ce4583287ad9 (patch) | |
| tree | 7297fc06e32c1fd44a5abb893e8095cae3cb7e14 /drivers/vfio/platform/vfio_platform_common.c | |
| parent | 682704c41e6d2238c1fb5c6ab83eedadd876fa0e (diff) | |
vfio/platform: initial interrupts support code
This patch is a skeleton for the VFIO_DEVICE_SET_IRQS IOCTL, around which
most IRQ functionality is implemented in VFIO.
Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com>
Reviewed-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/platform/vfio_platform_common.c')
| -rw-r--r-- | drivers/vfio/platform/vfio_platform_common.c | 52 |
1 files changed, 49 insertions, 3 deletions
diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c index 908d5101e053..abcff7a1aa66 100644 --- a/drivers/vfio/platform/vfio_platform_common.c +++ b/drivers/vfio/platform/vfio_platform_common.c @@ -205,10 +205,54 @@ static long vfio_platform_ioctl(void *device_data, return copy_to_user((void __user *)arg, &info, minsz); - } else if (cmd == VFIO_DEVICE_SET_IRQS) - return -EINVAL; + } else if (cmd == VFIO_DEVICE_SET_IRQS) { + struct vfio_irq_set hdr; + u8 *data = NULL; + int ret = 0; + + minsz = offsetofend(struct vfio_irq_set, count); + + if (copy_from_user(&hdr, (void __user *)arg, minsz)) + return -EFAULT; + + if (hdr.argsz < minsz) + return -EINVAL; + + if (hdr.index >= vdev->num_irqs) + return -EINVAL; + + if (hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK | + VFIO_IRQ_SET_ACTION_TYPE_MASK)) + return -EINVAL; - else if (cmd == VFIO_DEVICE_RESET) + if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) { + size_t size; + + if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL) + size = sizeof(uint8_t); + else if (hdr.flags & VFIO_IRQ_SET_DATA_EVENTFD) + size = sizeof(int32_t); + else + return -EINVAL; + + if (hdr.argsz - minsz < size) + return -EINVAL; + + data = memdup_user((void __user *)(arg + minsz), size); + if (IS_ERR(data)) + return PTR_ERR(data); + } + + mutex_lock(&vdev->igate); + + ret = vfio_platform_set_irqs_ioctl(vdev, hdr.flags, hdr.index, + hdr.start, hdr.count, data); + mutex_unlock(&vdev->igate); + kfree(data); + + return ret; + + } else if (cmd == VFIO_DEVICE_RESET) return -EINVAL; return -ENOTTY; @@ -458,6 +502,8 @@ int vfio_platform_probe_common(struct vfio_platform_device *vdev, return ret; } + mutex_init(&vdev->igate); + return 0; } EXPORT_SYMBOL_GPL(vfio_platform_probe_common); |