/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_VIRTIO_PCI_MODERN_H
#define _LINUX_VIRTIO_PCI_MODERN_H
#include <linux/pci.h>
#include <linux/virtio_config.h>
#include <linux/virtio_pci.h>
/**
* 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;
void __iomem *device;
void __iomem *notify_base;
resource_size_t notify_pa;
u8 __iomem *isr;
size_t notify_len;
size_t device_len;
size_t common_len;
int notify_map_cap;
u32 notify_offset_multiplier;
int modern_bars;
struct virtio_device_id id;
int (*device_id_check)(struct pci_dev *pdev);
u64 dma_mask;
};
/*
* Type - safe wrappers for io accesses .
* Use these to enforce at compile time the following spec requirement :
*
* The driver MUST access each field using the “ natural ” access
* method , i . e . 32 - bit accesses for 32 - bit fields , 16 - bit accesses
* for 16 - bit fields and 8 - bit accesses for 8 - bit fields .
*/
static inline u8 vp_ioread8(const u8 __iomem *addr)
{
return ioread8(addr);
}
static inline u16 vp_ioread16 (const __le16 __iomem *addr)
{
return ioread16(addr);
}
static inline u32 vp_ioread32(const __le32 __iomem *addr)
{
return ioread32(addr);
}
static inline void vp_iowrite8(u8 value, u8 __iomem *addr)
{
iowrite8(value, addr);
}
static inline void vp_iowrite16(u16 value, __le16 __iomem *addr)
{
iowrite16(value, addr);
}
static inline void vp_iowrite32(u32 value, __le32 __iomem *addr)
{
iowrite32(value, addr);
}
static inline void vp_iowrite64_twopart(u64 val,
__le32 __iomem *lo,
__le32 __iomem *hi)
{
vp_iowrite32((u32)val, lo);
vp_iowrite32(val >> 32 , hi);
}
void
vp_modern_get_driver_extended_features(struct virtio_pci_modern_device *mdev,
u64 *features);
void vp_modern_get_extended_features(struct virtio_pci_modern_device *mdev,
u64 *features);
void vp_modern_set_extended_features(struct virtio_pci_modern_device *mdev,
const u64 *features);
static inline u64
vp_modern_get_features(struct virtio_pci_modern_device *mdev)
{
u64 features_array[VIRTIO_FEATURES_DWORDS];
vp_modern_get_extended_features(mdev, features_array);
return features_array[0 ];
}
static inline u64
vp_modern_get_driver_features(struct virtio_pci_modern_device *mdev)
{
u64 features_array[VIRTIO_FEATURES_DWORDS];
int i;
vp_modern_get_driver_extended_features(mdev, features_array);
for (i = 1 ; i < VIRTIO_FEATURES_DWORDS; ++i)
WARN_ON_ONCE(features_array[i]);
return features_array[0 ];
}
static inline void
vp_modern_set_features(struct virtio_pci_modern_device *mdev, u64 features)
{
u64 features_array[VIRTIO_FEATURES_DWORDS];
virtio_features_from_u64(features_array, features);
vp_modern_set_extended_features(mdev, features_array);
}
u32 vp_modern_generation(struct virtio_pci_modern_device *mdev);
u8 vp_modern_get_status(struct virtio_pci_modern_device *mdev);
void vp_modern_set_status(struct virtio_pci_modern_device *mdev,
u8 status);
u16 vp_modern_queue_vector(struct virtio_pci_modern_device *mdev,
u16 idx, u16 vector);
u16 vp_modern_config_vector(struct virtio_pci_modern_device *mdev,
u16 vector);
void vp_modern_queue_address(struct virtio_pci_modern_device *mdev,
u16 index, u64 desc_addr, u64 driver_addr,
u64 device_addr);
void vp_modern_set_queue_enable(struct virtio_pci_modern_device *mdev,
u16 idx, bool enable);
bool vp_modern_get_queue_enable(struct virtio_pci_modern_device *mdev,
u16 idx);
void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
u16 idx, u16 size);
u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
u16 idx);
u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
u16 index, resource_size_t *pa);
int vp_modern_probe(struct virtio_pci_modern_device *mdev);
void vp_modern_remove(struct virtio_pci_modern_device *mdev);
int vp_modern_get_queue_reset(struct virtio_pci_modern_device *mdev, u16 index);
void vp_modern_set_queue_reset(struct virtio_pci_modern_device *mdev, u16 index);
u16 vp_modern_avq_num(struct virtio_pci_modern_device *mdev);
u16 vp_modern_avq_index(struct virtio_pci_modern_device *mdev);
#endif
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¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-09-29)
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