diff options
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci.c | 59 |
1 files changed, 29 insertions, 30 deletions
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index b28e66c4376..469e110d7ea 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -366,8 +366,8 @@ static long vfio_pci_ioctl(void *device_data, return -ENOTTY; } -static ssize_t vfio_pci_read(void *device_data, char __user *buf, - size_t count, loff_t *ppos) +static ssize_t vfio_pci_rw(void *device_data, char __user *buf, + size_t count, loff_t *ppos, bool iswrite) { unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); struct vfio_pci_device *vdev = device_data; @@ -376,42 +376,41 @@ static ssize_t vfio_pci_read(void *device_data, char __user *buf, if (index >= VFIO_PCI_NUM_REGIONS) return -EINVAL; - if (index == VFIO_PCI_CONFIG_REGION_INDEX) - return vfio_pci_config_readwrite(vdev, buf, count, ppos, false); - else if (index == VFIO_PCI_ROM_REGION_INDEX) - return vfio_pci_mem_readwrite(vdev, buf, count, ppos, false); - else if (pci_resource_flags(pdev, index) & IORESOURCE_IO) - return vfio_pci_io_readwrite(vdev, buf, count, ppos, false); - else if (pci_resource_flags(pdev, index) & IORESOURCE_MEM) + switch (index) { + case VFIO_PCI_CONFIG_REGION_INDEX: + return vfio_pci_config_readwrite(vdev, buf, count, + ppos, iswrite); + case VFIO_PCI_ROM_REGION_INDEX: + if (iswrite) + return -EINVAL; return vfio_pci_mem_readwrite(vdev, buf, count, ppos, false); + case VFIO_PCI_BAR0_REGION_INDEX ... VFIO_PCI_BAR5_REGION_INDEX: + { + unsigned long flags = pci_resource_flags(pdev, index); + + if (flags & IORESOURCE_IO) + return vfio_pci_io_readwrite(vdev, buf, count, + ppos, iswrite); + if (flags & IORESOURCE_MEM) + return vfio_pci_mem_readwrite(vdev, buf, count, + ppos, iswrite); + } + } + return -EINVAL; } +static ssize_t vfio_pci_read(void *device_data, char __user *buf, + size_t count, loff_t *ppos) +{ + return vfio_pci_rw(device_data, buf, count, ppos, false); +} + static ssize_t vfio_pci_write(void *device_data, const char __user *buf, size_t count, loff_t *ppos) { - unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); - struct vfio_pci_device *vdev = device_data; - struct pci_dev *pdev = vdev->pdev; - - if (index >= VFIO_PCI_NUM_REGIONS) - return -EINVAL; - - if (index == VFIO_PCI_CONFIG_REGION_INDEX) - return vfio_pci_config_readwrite(vdev, (char __user *)buf, - count, ppos, true); - else if (index == VFIO_PCI_ROM_REGION_INDEX) - return -EINVAL; - else if (pci_resource_flags(pdev, index) & IORESOURCE_IO) - return vfio_pci_io_readwrite(vdev, (char __user *)buf, - count, ppos, true); - else if (pci_resource_flags(pdev, index) & IORESOURCE_MEM) { - return vfio_pci_mem_readwrite(vdev, (char __user *)buf, - count, ppos, true); - } - - return -EINVAL; + return vfio_pci_rw(device_data, buf, count, ppos, true); } static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma) |