On Mon, Sep 11, 2023 at 02:31:04PM -0700, Shannon Nelson wrote: > Finally following up to Simon's suggestion for some kdoc attention > on struct virtio_pci_modern_device. > > Link: https://lore.kernel.org/netdev/ZE%2FQS0lnUvxFacjf@xxxxxxxxxxxx/ > Cc: Simon Horman <simon.horman@xxxxxxxxxxxx> > Signed-off-by: Shannon Nelson <shannon.nelson@xxxxxxx> > Acked-by: Eugenio Pérez <eperezma@xxxxxxxxxx> not sure why this is net material though. I think I will take it in virtio tree. > --- > include/linux/virtio_pci_modern.h | 34 ++++++++++++++++++++----------- > 1 file changed, 22 insertions(+), 12 deletions(-) > > diff --git a/include/linux/virtio_pci_modern.h b/include/linux/virtio_pci_modern.h > index 067ac1d789bc..a38c729d1973 100644 > --- a/include/linux/virtio_pci_modern.h > +++ b/include/linux/virtio_pci_modern.h > @@ -12,37 +12,47 @@ struct virtio_pci_modern_common_cfg { > __le16 queue_reset; /* read-write */ > }; > > +/** > + * struct virtio_pci_modern_device - info for modern PCI virtio > + * @pci_dev: Ptr to the PCI device struct > + * @common: Position of the common capability in the PCI config > + * @device: Device-specific data (non-legacy mode) > + * @notify_base: Base of vq notifications (non-legacy mode) > + * @notify_pa: Physical base of vq notifications > + * @isr: Where to read and clear interrupt > + * @notify_len: So we can sanity-check accesses > + * @device_len: So we can sanity-check accesses > + * @notify_map_cap: Capability for when we need to map notifications per-vq > + * @notify_offset_multiplier: Multiply queue_notify_off by this value > + * (non-legacy mode). > + * @modern_bars: Bitmask of BARs > + * @id: Device and vendor id > + * @device_id_check: Callback defined before vp_modern_probe() to be used to > + * verify the PCI device is a vendor's expected device rather > + * than the standard virtio PCI device > + * Returns the found device id or ERRNO > + * @dma_mask: Optional mask instead of the traditional DMA_BIT_MASK(64), > + * for vendor devices with DMA space address limitations > + */ > struct virtio_pci_modern_device { > struct pci_dev *pci_dev; > > struct virtio_pci_common_cfg __iomem *common; > - /* Device-specific data (non-legacy mode) */ > void __iomem *device; > - /* Base of vq notifications (non-legacy mode). */ > void __iomem *notify_base; > - /* Physical base of vq notifications */ > resource_size_t notify_pa; > - /* Where to read and clear interrupt */ > u8 __iomem *isr; > > - /* So we can sanity-check accesses. */ > size_t notify_len; > size_t device_len; > > - /* Capability for when we need to map notifications per-vq. */ > int notify_map_cap; > > - /* Multiply queue_notify_off by this value. (non-legacy mode). */ > u32 notify_offset_multiplier; > - > int modern_bars; > - > struct virtio_device_id id; > > - /* optional check for vendor virtio device, returns dev_id or -ERRNO */ > int (*device_id_check)(struct pci_dev *pdev); > - > - /* optional mask for devices with limited DMA space */ > u64 dma_mask; > }; > > -- > 2.17.1 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
