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_common_cfg {
9 struct virtio_pci_common_cfg cfg;
11 __le16 queue_notify_data; /* read-write */
12 __le16 queue_reset; /* read-write */
16 * struct virtio_pci_modern_device - info for modern PCI virtio
17 * @pci_dev: Ptr to the PCI device struct
18 * @common: Position of the common capability in the PCI config
19 * @device: Device-specific data (non-legacy mode)
20 * @notify_base: Base of vq notifications (non-legacy mode)
21 * @notify_pa: Physical base of vq notifications
22 * @isr: Where to read and clear interrupt
23 * @notify_len: So we can sanity-check accesses
24 * @device_len: So we can sanity-check accesses
25 * @notify_map_cap: Capability for when we need to map notifications per-vq
26 * @notify_offset_multiplier: Multiply queue_notify_off by this value
28 * @modern_bars: Bitmask of BARs
29 * @id: Device and vendor id
30 * @device_id_check: Callback defined before vp_modern_probe() to be used to
31 * verify the PCI device is a vendor's expected device rather
32 * than the standard virtio PCI device
33 * Returns the found device id or ERRNO
34 * @dma_mask: Optional mask instead of the traditional DMA_BIT_MASK(64),
35 * for vendor devices with DMA space address limitations
37 struct virtio_pci_modern_device {
38 struct pci_dev *pci_dev;
40 struct virtio_pci_common_cfg __iomem *common;
42 void __iomem *notify_base;
43 resource_size_t notify_pa;
51 u32 notify_offset_multiplier;
53 struct virtio_device_id id;
55 int (*device_id_check)(struct pci_dev *pdev);
60 * Type-safe wrappers for io accesses.
61 * Use these to enforce at compile time the following spec requirement:
63 * The driver MUST access each field using the “natural” access
64 * method, i.e. 32-bit accesses for 32-bit fields, 16-bit accesses
65 * for 16-bit fields and 8-bit accesses for 8-bit fields.
67 static inline u8 vp_ioread8(const u8 __iomem *addr)
71 static inline u16 vp_ioread16 (const __le16 __iomem *addr)
73 return ioread16(addr);
76 static inline u32 vp_ioread32(const __le32 __iomem *addr)
78 return ioread32(addr);
81 static inline void vp_iowrite8(u8 value, u8 __iomem *addr)
83 iowrite8(value, addr);
86 static inline void vp_iowrite16(u16 value, __le16 __iomem *addr)
88 iowrite16(value, addr);
91 static inline void vp_iowrite32(u32 value, __le32 __iomem *addr)
93 iowrite32(value, addr);
96 static inline void vp_iowrite64_twopart(u64 val,
100 vp_iowrite32((u32)val, lo);
101 vp_iowrite32(val >> 32, hi);
104 u64 vp_modern_get_features(struct virtio_pci_modern_device *mdev);
105 u64 vp_modern_get_driver_features(struct virtio_pci_modern_device *mdev);
106 void vp_modern_set_features(struct virtio_pci_modern_device *mdev,
108 u32 vp_modern_generation(struct virtio_pci_modern_device *mdev);
109 u8 vp_modern_get_status(struct virtio_pci_modern_device *mdev);
110 void vp_modern_set_status(struct virtio_pci_modern_device *mdev,
112 u16 vp_modern_queue_vector(struct virtio_pci_modern_device *mdev,
113 u16 idx, u16 vector);
114 u16 vp_modern_config_vector(struct virtio_pci_modern_device *mdev,
116 void vp_modern_queue_address(struct virtio_pci_modern_device *mdev,
117 u16 index, u64 desc_addr, u64 driver_addr,
119 void vp_modern_set_queue_enable(struct virtio_pci_modern_device *mdev,
120 u16 idx, bool enable);
121 bool vp_modern_get_queue_enable(struct virtio_pci_modern_device *mdev,
123 void vp_modern_set_queue_size(struct virtio_pci_modern_device *mdev,
125 u16 vp_modern_get_queue_size(struct virtio_pci_modern_device *mdev,
127 u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev);
128 void __iomem * vp_modern_map_vq_notify(struct virtio_pci_modern_device *mdev,
129 u16 index, resource_size_t *pa);
130 int vp_modern_probe(struct virtio_pci_modern_device *mdev);
131 void vp_modern_remove(struct virtio_pci_modern_device *mdev);
132 int vp_modern_get_queue_reset(struct virtio_pci_modern_device *mdev, u16 index);
133 void vp_modern_set_queue_reset(struct virtio_pci_modern_device *mdev, u16 index);