tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Intel IFC VF NIC driver for virtio dataplane offloading
4 *
5 * Copyright (C) 2020 Intel Corporation.
6 *
7 * Author: Zhu Lingshan <lingshan.zhu@intel.com>
8 *
9 */
10
11#ifndef _IFCVF_H_
12#define _IFCVF_H_
13
14#include <linux/pci.h>
15#include <linux/pci_regs.h>
16#include <linux/vdpa.h>
17#include <linux/virtio_pci_modern.h>
18#include <uapi/linux/virtio_net.h>
19#include <uapi/linux/virtio_blk.h>
20#include <uapi/linux/virtio_config.h>
21#include <uapi/linux/virtio_pci.h>
22#include <uapi/linux/vdpa.h>
23
24#define N3000_DEVICE_ID 0x1041
25#define N3000_SUBSYS_DEVICE_ID 0x001A
26
27/* Max 8 data queue pairs(16 queues) and one control vq for now. */
28#define IFCVF_MAX_QUEUES 17
29
30#define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE
31#define IFCVF_QUEUE_MAX 32768
32#define IFCVF_PCI_MAX_RESOURCE 6
33
34#define IFCVF_LM_CFG_SIZE 0x40
35#define IFCVF_LM_RING_STATE_OFFSET 0x20
36#define IFCVF_LM_BAR 4
37
38#define IFCVF_ERR(pdev, fmt, ...) dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
39#define IFCVF_DBG(pdev, fmt, ...) dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
40#define IFCVF_INFO(pdev, fmt, ...) dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
41
42/* all vqs and config interrupt has its own vector */
43#define MSIX_VECTOR_PER_VQ_AND_CONFIG 1
44/* all vqs share a vector, and config interrupt has a separate vector */
45#define MSIX_VECTOR_SHARED_VQ_AND_CONFIG 2
46/* all vqs and config interrupt share a vector */
47#define MSIX_VECTOR_DEV_SHARED 3
48
49struct vring_info {
50 u64 desc;
51 u64 avail;
52 u64 used;
53 u16 size;
54 u16 last_avail_idx;
55 bool ready;
56 void __iomem *notify_addr;
57 phys_addr_t notify_pa;
58 u32 irq;
59 struct vdpa_callback cb;
60 char msix_name[256];
61};
62
63struct ifcvf_hw {
64 u8 __iomem *isr;
65 /* Live migration */
66 u8 __iomem *lm_cfg;
67 /* Notification bar number */
68 u8 notify_bar;
69 u8 msix_vector_status;
70 /* virtio-net or virtio-blk device config size */
71 u32 config_size;
72 /* Notificaiton bar address */
73 void __iomem *notify_base;
74 phys_addr_t notify_base_pa;
75 u32 notify_off_multiplier;
76 u32 dev_type;
77 u64 req_features;
78 u64 hw_features;
79 /* provisioned device features */
80 u64 dev_features;
81 struct virtio_pci_common_cfg __iomem *common_cfg;
82 void __iomem *dev_cfg;
83 struct vring_info vring[IFCVF_MAX_QUEUES];
84 void __iomem * const *base;
85 char config_msix_name[256];
86 struct vdpa_callback config_cb;
87 int config_irq;
88 int vqs_reused_irq;
89 u16 nr_vring;
90 /* VIRTIO_PCI_CAP_DEVICE_CFG size */
91 u32 cap_dev_config_size;
92 struct pci_dev *pdev;
93};
94
95struct ifcvf_adapter {
96 struct vdpa_device vdpa;
97 struct pci_dev *pdev;
98 struct ifcvf_hw *vf;
99};
100
101struct ifcvf_vring_lm_cfg {
102 u32 idx_addr[2];
103 u8 reserved[IFCVF_LM_CFG_SIZE - 8];
104};
105
106struct ifcvf_lm_cfg {
107 u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
108 struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUES];
109};
110
111struct ifcvf_vdpa_mgmt_dev {
112 struct vdpa_mgmt_dev mdev;
113 struct ifcvf_hw vf;
114 struct ifcvf_adapter *adapter;
115 struct pci_dev *pdev;
116};
117
118int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
119int ifcvf_start_hw(struct ifcvf_hw *hw);
120void ifcvf_stop_hw(struct ifcvf_hw *hw);
121void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
122void ifcvf_read_dev_config(struct ifcvf_hw *hw, u64 offset,
123 void *dst, int length);
124void ifcvf_write_dev_config(struct ifcvf_hw *hw, u64 offset,
125 const void *src, int length);
126u8 ifcvf_get_status(struct ifcvf_hw *hw);
127void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
128void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
129void ifcvf_reset(struct ifcvf_hw *hw);
130u64 ifcvf_get_features(struct ifcvf_hw *hw);
131u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
132int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
133u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
134int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
135struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
136int ifcvf_probed_virtio_net(struct ifcvf_hw *hw);
137u32 ifcvf_get_config_size(struct ifcvf_hw *hw);
138u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector);
139u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector);
140#endif /* _IFCVF_H_ */