1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Intel IFC VF NIC driver for virtio dataplane offloading
5 * Copyright (C) 2020 Intel Corporation.
7 * Author: Zhu Lingshan <lingshan.zhu@intel.com>
14 #include <linux/pci.h>
15 #include <linux/pci_regs.h>
16 #include <linux/vdpa.h>
17 #include <uapi/linux/virtio_net.h>
18 #include <uapi/linux/virtio_blk.h>
19 #include <uapi/linux/virtio_config.h>
20 #include <uapi/linux/virtio_pci.h>
22 #define N3000_DEVICE_ID 0x1041
23 #define N3000_SUBSYS_DEVICE_ID 0x001A
25 #define IFCVF_NET_SUPPORTED_FEATURES \
26 ((1ULL << VIRTIO_NET_F_MAC) | \
27 (1ULL << VIRTIO_F_ANY_LAYOUT) | \
28 (1ULL << VIRTIO_F_VERSION_1) | \
29 (1ULL << VIRTIO_NET_F_STATUS) | \
30 (1ULL << VIRTIO_F_ORDER_PLATFORM) | \
31 (1ULL << VIRTIO_F_ACCESS_PLATFORM) | \
32 (1ULL << VIRTIO_NET_F_MRG_RXBUF))
34 /* Only one queue pair for now. */
35 #define IFCVF_MAX_QUEUE_PAIRS 1
37 #define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE
38 #define IFCVF_QUEUE_MAX 32768
39 #define IFCVF_MSI_CONFIG_OFF 0
40 #define IFCVF_MSI_QUEUE_OFF 1
41 #define IFCVF_PCI_MAX_RESOURCE 6
43 #define IFCVF_LM_CFG_SIZE 0x40
44 #define IFCVF_LM_RING_STATE_OFFSET 0x20
45 #define IFCVF_LM_BAR 4
47 #define IFCVF_ERR(pdev, fmt, ...) dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
48 #define IFCVF_DBG(pdev, fmt, ...) dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
49 #define IFCVF_INFO(pdev, fmt, ...) dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
51 #define ifcvf_private_to_vf(adapter) \
52 (&((struct ifcvf_adapter *)adapter)->vf)
54 #define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1)
63 void __iomem *notify_addr;
64 phys_addr_t notify_pa;
66 struct vdpa_callback cb;
75 /* Notification bar number */
77 /* Notificaiton bar address */
78 void __iomem *notify_base;
79 phys_addr_t notify_base_pa;
80 u32 notify_off_multiplier;
84 struct virtio_pci_common_cfg __iomem *common_cfg;
85 void __iomem *net_cfg;
86 struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
87 void __iomem * const *base;
88 char config_msix_name[256];
89 struct vdpa_callback config_cb;
90 unsigned int config_irq;
93 struct ifcvf_adapter {
94 struct vdpa_device vdpa;
99 struct ifcvf_vring_lm_cfg {
101 u8 reserved[IFCVF_LM_CFG_SIZE - 8];
104 struct ifcvf_lm_cfg {
105 u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
106 struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUE_PAIRS];
109 int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
110 int ifcvf_start_hw(struct ifcvf_hw *hw);
111 void ifcvf_stop_hw(struct ifcvf_hw *hw);
112 void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
113 void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
114 void *dst, int length);
115 void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset,
116 const void *src, int length);
117 u8 ifcvf_get_status(struct ifcvf_hw *hw);
118 void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
119 void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
120 void ifcvf_reset(struct ifcvf_hw *hw);
121 u64 ifcvf_get_features(struct ifcvf_hw *hw);
122 u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
123 int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
124 u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
125 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
126 struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
127 int ifcvf_probed_virtio_net(struct ifcvf_hw *hw);
128 #endif /* _IFCVF_H_ */