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fd502729 JW |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_VIRTIO_PCI_MODERN_H | |
3 | #define _LINUX_VIRTIO_PCI_MODERN_H | |
4 | ||
5 | #include <linux/pci.h> | |
6 | #include <linux/virtio_pci.h> | |
7 | ||
ea024594 XZ |
8 | struct virtio_pci_modern_common_cfg { |
9 | struct virtio_pci_common_cfg cfg; | |
10 | ||
11 | __le16 queue_notify_data; /* read-write */ | |
0cdd450e | 12 | __le16 queue_reset; /* read-write */ |
ea024594 XZ |
13 | }; |
14 | ||
fd502729 JW |
15 | struct virtio_pci_modern_device { |
16 | struct pci_dev *pci_dev; | |
17 | ||
18 | struct virtio_pci_common_cfg __iomem *common; | |
19 | /* Device-specific data (non-legacy mode) */ | |
20 | void __iomem *device; | |
21 | /* Base of vq notifications (non-legacy mode). */ | |
22 | void __iomem *notify_base; | |
9e311bca JW |
23 | /* Physical base of vq notifications */ |
24 | resource_size_t notify_pa; | |
fd502729 JW |
25 | /* Where to read and clear interrupt */ |
26 | u8 __iomem *isr; | |
27 | ||
28 | /* So we can sanity-check accesses. */ | |
29 | size_t notify_len; | |
30 | size_t device_len; | |
31 | ||
32 | /* Capability for when we need to map notifications per-vq. */ | |
33 | int notify_map_cap; | |
34 | ||
35 | /* Multiply queue_notify_off by this value. (non-legacy mode). */ | |
36 | u32 notify_offset_multiplier; | |
37 | ||
38 | int modern_bars; | |
39 | ||
40 | struct virtio_device_id id; | |
41 | }; | |
42 | ||
43 | /* | |
44 | * Type-safe wrappers for io accesses. | |
45 | * Use these to enforce at compile time the following spec requirement: | |
46 | * | |
47 | * The driver MUST access each field using the “natural” access | |
48 | * method, i.e. 32-bit accesses for 32-bit fields, 16-bit accesses | |
49 | * for 16-bit fields and 8-bit accesses for 8-bit fields. | |
50 | */ | |
51 | static inline u8 vp_ioread8(const u8 __iomem *addr) | |
52 | { | |
53 | return ioread8(addr); | |
54 | } | |
55 | static inline u16 vp_ioread16 (const __le16 __iomem *addr) | |
56 | { | |
57 | return ioread16(addr); | |
58 | } | |
59 | ||
60 | static inline u32 vp_ioread32(const __le32 __iomem *addr) | |
61 | { | |
62 | return ioread32(addr); | |
63 | } | |
64 | ||
65 | static inline void vp_iowrite8(u8 value, u8 __iomem *addr) | |
66 | { | |
67 | iowrite8(value, addr); | |
68 | } | |
69 | ||
70 | static inline void vp_iowrite16(u16 value, __le16 __iomem *addr) | |
71 | { | |
72 | iowrite16(value, addr); | |
73 | } | |
74 | ||
75 | static inline void vp_iowrite32(u32 value, __le32 __iomem *addr) | |
76 | { | |
77 | iowrite32(value, addr); | |
78 | } | |
79 | ||
80 | static inline void vp_iowrite64_twopart(u64 val, | |
81 | __le32 __iomem *lo, | |
82 | __le32 __iomem *hi) | |
83 | { | |
84 | vp_iowrite32((u32)val, lo); | |
85 | vp_iowrite32(val >> 32, hi); | |
86 | } | |
87 | ||
88 | u64 vp_modern_get_features(struct virtio_pci_modern_device *mdev); | |
0140b3d0 | 89 | u64 vp_modern_get_driver_features(struct virtio_pci_modern_device *mdev); |
fd502729 JW |
90 | void vp_modern_set_features(struct virtio_pci_modern_device *mdev, |
91 | u64 features); | |
92 | u32 vp_modern_generation(struct virtio_pci_modern_device *mdev); | |
93 | u8 vp_modern_get_status(struct virtio_pci_modern_device *mdev); | |
94 | void vp_modern_set_status(struct virtio_pci_modern_device *mdev, | |
95 | u8 status); | |
96 | u16 vp_modern_queue_vector(struct virtio_pci_modern_device *mdev, | |
97 | u16 idx, u16 vector); | |
98 | u16 vp_modern_config_vector(struct virtio_pci_modern_device *mdev, | |
99 | u16 vector); | |
100 | void vp_modern_queue_address(struct virtio_pci_modern_device *mdev, | |
101 | u16 index, u64 desc_addr, u64 driver_addr, | |
102 | u64 device_addr); | |
103 | void vp_modern_set_queue_enable(struct virtio_pci_modern_device *mdev, | |
104 | u16 idx, bool enable); | |
105 | bool vp_modern_get_queue_enable(struct virtio_pci_modern_device *mdev, | |
106 | u16 idx); | |
107 | void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev, | |
108 | u16 idx, u16 size); | |
109 | u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev, | |
110 | u16 idx); | |
111 | u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev); | |
d7bce85a MT |
112 | void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev, |
113 | u16 index, resource_size_t *pa); | |
fd502729 JW |
114 | int vp_modern_probe(struct virtio_pci_modern_device *mdev); |
115 | void vp_modern_remove(struct virtio_pci_modern_device *mdev); | |
0b50cece XZ |
116 | int vp_modern_get_queue_reset(struct virtio_pci_modern_device *mdev, u16 index); |
117 | void vp_modern_set_queue_reset(struct virtio_pci_modern_device *mdev, u16 index); | |
fd502729 | 118 | #endif |