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_config.h>
19 #include <uapi/linux/virtio_pci.h>
21 #define IFCVF_VENDOR_ID 0x1AF4
22 #define IFCVF_DEVICE_ID 0x1041
23 #define IFCVF_SUBSYS_VENDOR_ID 0x8086
24 #define IFCVF_SUBSYS_DEVICE_ID 0x001A
26 #define C5000X_PL_VENDOR_ID 0x1AF4
27 #define C5000X_PL_DEVICE_ID 0x1000
28 #define C5000X_PL_SUBSYS_VENDOR_ID 0x8086
29 #define C5000X_PL_SUBSYS_DEVICE_ID 0x0001
31 #define IFCVF_SUPPORTED_FEATURES \
32 ((1ULL << VIRTIO_NET_F_MAC) | \
33 (1ULL << VIRTIO_F_ANY_LAYOUT) | \
34 (1ULL << VIRTIO_F_VERSION_1) | \
35 (1ULL << VIRTIO_NET_F_STATUS) | \
36 (1ULL << VIRTIO_F_ORDER_PLATFORM) | \
37 (1ULL << VIRTIO_F_ACCESS_PLATFORM) | \
38 (1ULL << VIRTIO_NET_F_MRG_RXBUF))
40 /* Only one queue pair for now. */
41 #define IFCVF_MAX_QUEUE_PAIRS 1
43 #define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE
44 #define IFCVF_QUEUE_MAX 32768
45 #define IFCVF_MSI_CONFIG_OFF 0
46 #define IFCVF_MSI_QUEUE_OFF 1
47 #define IFCVF_PCI_MAX_RESOURCE 6
49 #define IFCVF_LM_CFG_SIZE 0x40
50 #define IFCVF_LM_RING_STATE_OFFSET 0x20
51 #define IFCVF_LM_BAR 4
53 #define IFCVF_ERR(pdev, fmt, ...) dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
54 #define IFCVF_DBG(pdev, fmt, ...) dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
55 #define IFCVF_INFO(pdev, fmt, ...) dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
57 #define ifcvf_private_to_vf(adapter) \
58 (&((struct ifcvf_adapter *)adapter)->vf)
60 #define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1)
69 void __iomem *notify_addr;
71 struct vdpa_callback cb;
80 /* Notification bar number */
82 /* Notificaiton bar address */
83 void __iomem *notify_base;
84 u32 notify_off_multiplier;
86 struct virtio_pci_common_cfg __iomem *common_cfg;
87 void __iomem *net_cfg;
88 struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
89 void __iomem * const *base;
90 char config_msix_name[256];
91 struct vdpa_callback config_cb;
92 unsigned int config_irq;
95 struct ifcvf_adapter {
96 struct vdpa_device vdpa;
101 struct ifcvf_vring_lm_cfg {
103 u8 reserved[IFCVF_LM_CFG_SIZE - 8];
106 struct ifcvf_lm_cfg {
107 u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
108 struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUE_PAIRS];
111 int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
112 int ifcvf_start_hw(struct ifcvf_hw *hw);
113 void ifcvf_stop_hw(struct ifcvf_hw *hw);
114 void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
115 void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset,
116 void *dst, int length);
117 void ifcvf_write_net_config(struct ifcvf_hw *hw, u64 offset,
118 const void *src, int length);
119 u8 ifcvf_get_status(struct ifcvf_hw *hw);
120 void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
121 void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
122 void ifcvf_reset(struct ifcvf_hw *hw);
123 u64 ifcvf_get_features(struct ifcvf_hw *hw);
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 #endif /* _IFCVF_H_ */