projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 8 | struct virtio_pci_modern_device { | |
| 9 | struct pci_dev *pci_dev; | |
| 10 | ||
| 11 | struct virtio_pci_common_cfg __iomem *common; | |
| 12 | /* Device-specific data (non-legacy mode) */ | |
| 13 | void __iomem *device; | |
| 14 | /* Base of vq notifications (non-legacy mode). */ | |
| 15 | void __iomem *notify_base; | |
| 9e311bca JW |
16 | /* Physical base of vq notifications */ |
| 17 | resource_size_t notify_pa; | |
| fd502729 JW |
18 | /* Where to read and clear interrupt */ |
| 19 | u8 __iomem *isr; | |
| 20 | ||
| 21 | /* So we can sanity-check accesses. */ | |
| 22 | size_t notify_len; | |
| 23 | size_t device_len; | |
| 24 | ||
| 25 | /* Capability for when we need to map notifications per-vq. */ | |
| 26 | int notify_map_cap; | |
| 27 | ||
| 28 | /* Multiply queue_notify_off by this value. (non-legacy mode). */ | |
| 29 | u32 notify_offset_multiplier; | |
| 30 | ||
| 31 | int modern_bars; | |
| 32 | ||
| 33 | struct virtio_device_id id; | |
| 34 | }; | |
| 35 | ||
| 36 | /* | |
| 37 | * Type-safe wrappers for io accesses. | |
| 38 | * Use these to enforce at compile time the following spec requirement: | |
| 39 | * | |
| 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. | |
| 43 | */ | |
| 44 | static inline u8 vp_ioread8(const u8 __iomem *addr) | |
| 45 | { | |
| 46 | return ioread8(addr); | |
| 47 | } | |
| 48 | static inline u16 vp_ioread16 (const __le16 __iomem *addr) | |
| 49 | { | |
| 50 | return ioread16(addr); | |
| 51 | } | |
| 52 | ||
| 53 | static inline u32 vp_ioread32(const __le32 __iomem *addr) | |
| 54 | { | |
| 55 | return ioread32(addr); | |
| 56 | } | |
| 57 | ||
| 58 | static inline void vp_iowrite8(u8 value, u8 __iomem *addr) | |
| 59 | { | |
| 60 | iowrite8(value, addr); | |
| 61 | } | |
| 62 | ||
| 63 | static inline void vp_iowrite16(u16 value, __le16 __iomem *addr) | |
| 64 | { | |
| 65 | iowrite16(value, addr); | |
| 66 | } | |
| 67 | ||
| 68 | static inline void vp_iowrite32(u32 value, __le32 __iomem *addr) | |
| 69 | { | |
| 70 | iowrite32(value, addr); | |
| 71 | } | |
| 72 | ||
| 73 | static inline void vp_iowrite64_twopart(u64 val, | |
| 74 | __le32 __iomem *lo, | |
| 75 | __le32 __iomem *hi) | |
| 76 | { | |
| 77 | vp_iowrite32((u32)val, lo); | |
| 78 | vp_iowrite32(val >> 32, hi); | |
| 79 | } | |
| 80 | ||
| 81 | u64 vp_modern_get_features(struct virtio_pci_modern_device *mdev); | |
| 82 | void vp_modern_set_features(struct virtio_pci_modern_device *mdev, | |
| 83 | u64 features); | |
| 84 | u32 vp_modern_generation(struct virtio_pci_modern_device *mdev); | |
| 85 | u8 vp_modern_get_status(struct virtio_pci_modern_device *mdev); | |
| 86 | void vp_modern_set_status(struct virtio_pci_modern_device *mdev, | |
| 87 | u8 status); | |
| 88 | u16 vp_modern_queue_vector(struct virtio_pci_modern_device *mdev, | |
| 89 | u16 idx, u16 vector); | |
| 90 | u16 vp_modern_config_vector(struct virtio_pci_modern_device *mdev, | |
| 91 | u16 vector); | |
| 92 | void vp_modern_queue_address(struct virtio_pci_modern_device *mdev, | |
| 93 | u16 index, u64 desc_addr, u64 driver_addr, | |
| 94 | u64 device_addr); | |
| 95 | void vp_modern_set_queue_enable(struct virtio_pci_modern_device *mdev, | |
| 96 | u16 idx, bool enable); | |
| 97 | bool vp_modern_get_queue_enable(struct virtio_pci_modern_device *mdev, | |
| 98 | u16 idx); | |
| 99 | void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev, | |
| 100 | u16 idx, u16 size); | |
| 101 | u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev, | |
| 102 | u16 idx); | |
| 103 | u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev); | |
| d7bce85a MT |
104 | void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev, |
| 105 | u16 index, resource_size_t *pa); | |
| fd502729 JW |
106 | int vp_modern_probe(struct virtio_pci_modern_device *mdev); |
| 107 | void vp_modern_remove(struct virtio_pci_modern_device *mdev); | |
| 108 | #endif |