1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_VIRTIO_PCI_MODERN_H
3 #define _LINUX_VIRTIO_PCI_MODERN_H
6 #include <linux/virtio_pci.h>
8 struct virtio_pci_modern_device
{
9 struct pci_dev
*pci_dev
;
11 struct virtio_pci_common_cfg __iomem
*common
;
12 /* Device-specific data (non-legacy mode) */
14 /* Base of vq notifications (non-legacy mode). */
15 void __iomem
*notify_base
;
16 /* Physical base of vq notifications */
17 resource_size_t notify_pa
;
18 /* Where to read and clear interrupt */
21 /* So we can sanity-check accesses. */
25 /* Capability for when we need to map notifications per-vq. */
28 /* Multiply queue_notify_off by this value. (non-legacy mode). */
29 u32 notify_offset_multiplier
;
33 struct virtio_device_id id
;
37 * Type-safe wrappers for io accesses.
38 * Use these to enforce at compile time the following spec requirement:
40 * The driver MUST access each field using the “natural” access
41 * method, i.e. 32-bit accesses for 32-bit fields, 16-bit accesses
42 * for 16-bit fields and 8-bit accesses for 8-bit fields.
44 static inline u8
vp_ioread8(const u8 __iomem
*addr
)
48 static inline u16
vp_ioread16 (const __le16 __iomem
*addr
)
50 return ioread16(addr
);
53 static inline u32
vp_ioread32(const __le32 __iomem
*addr
)
55 return ioread32(addr
);
58 static inline void vp_iowrite8(u8 value
, u8 __iomem
*addr
)
60 iowrite8(value
, addr
);
63 static inline void vp_iowrite16(u16 value
, __le16 __iomem
*addr
)
65 iowrite16(value
, addr
);
68 static inline void vp_iowrite32(u32 value
, __le32 __iomem
*addr
)
70 iowrite32(value
, addr
);
73 static inline void vp_iowrite64_twopart(u64 val
,
77 vp_iowrite32((u32
)val
, lo
);
78 vp_iowrite32(val
>> 32, hi
);
81 u64
vp_modern_get_features(struct virtio_pci_modern_device
*mdev
);
82 u64
vp_modern_get_driver_features(struct virtio_pci_modern_device
*mdev
);
83 void vp_modern_set_features(struct virtio_pci_modern_device
*mdev
,
85 u32
vp_modern_generation(struct virtio_pci_modern_device
*mdev
);
86 u8
vp_modern_get_status(struct virtio_pci_modern_device
*mdev
);
87 void vp_modern_set_status(struct virtio_pci_modern_device
*mdev
,
89 u16
vp_modern_queue_vector(struct virtio_pci_modern_device
*mdev
,
91 u16
vp_modern_config_vector(struct virtio_pci_modern_device
*mdev
,
93 void vp_modern_queue_address(struct virtio_pci_modern_device
*mdev
,
94 u16 index
, u64 desc_addr
, u64 driver_addr
,
96 void vp_modern_set_queue_enable(struct virtio_pci_modern_device
*mdev
,
97 u16 idx
, bool enable
);
98 bool vp_modern_get_queue_enable(struct virtio_pci_modern_device
*mdev
,
100 void vp_modern_set_queue_size(struct virtio_pci_modern_device
*mdev
,
102 u16
vp_modern_get_queue_size(struct virtio_pci_modern_device
*mdev
,
104 u16
vp_modern_get_num_queues(struct virtio_pci_modern_device
*mdev
);
105 void __iomem
* vp_modern_map_vq_notify(struct virtio_pci_modern_device
*mdev
,
106 u16 index
, resource_size_t
*pa
);
107 int vp_modern_probe(struct virtio_pci_modern_device
*mdev
);
108 void vp_modern_remove(struct virtio_pci_modern_device
*mdev
);