The virtio PCI capabilities describe regions of memory that should be mapped. Map those with dm_pci_map_bar() which will ensure they are valid PCI regions.
Signed-off-by: Andrew Scull ascull@google.com --- drivers/virtio/virtio_pci_modern.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-)
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index f1e64a3438..880a12cc28 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -459,19 +459,17 @@ static int virtio_pci_find_capability(struct udevice *udev, u8 cfg_type, static void __iomem *virtio_pci_map_capability(struct udevice *udev, const struct virtio_pci_cap *cap) { - ulong base; - void __iomem *p; - /* - * TODO: adding 64-bit BAR support - * - * Per spec, the BAR is permitted to be either 32-bit or 64-bit. - * For simplicity, only read the BAR address as 32-bit. + * Find the corresponding memory region that isn't system memory but is + * writable. */ - base = dm_pci_read_bar32(udev, cap->bar); - p = (void __iomem *)base + cap->offset; + unsigned long mask = + PCI_REGION_TYPE | PCI_REGION_SYS_MEMORY | PCI_REGION_RO; + unsigned long flags = PCI_REGION_MEM; + u8 *p = dm_pci_map_bar(udev, PCI_BASE_ADDRESS_0 + cap->bar, cap->offset, + cap->length, mask, flags);
- return p; + return (void __iomem *)p; }
static int virtio_pci_bind(struct udevice *udev)