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 23 #define N3000_DEVICE_ID 0x1041 24 #define N3000_SUBSYS_DEVICE_ID 0x001A 25 26 /* Max 8 data queue pairs(16 queues) and one control vq for now. */ 27 #define IFCVF_MAX_QUEUES 17 28 29 #define IFCVF_QUEUE_ALIGNMENT PAGE_SIZE 30 #define IFCVF_QUEUE_MAX 32768 31 #define IFCVF_PCI_MAX_RESOURCE 6 32 33 #define IFCVF_LM_CFG_SIZE 0x40 34 #define IFCVF_LM_RING_STATE_OFFSET 0x20 35 #define IFCVF_LM_BAR 4 36 37 #define IFCVF_ERR(pdev, fmt, ...) dev_err(&pdev->dev, fmt, ##__VA_ARGS__) 38 #define IFCVF_DBG(pdev, fmt, ...) dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__) 39 #define IFCVF_INFO(pdev, fmt, ...) dev_info(&pdev->dev, fmt, ##__VA_ARGS__) 40 41 #define ifcvf_private_to_vf(adapter) \ 42 (&((struct ifcvf_adapter *)adapter)->vf) 43 44 /* all vqs and config interrupt has its own vector */ 45 #define MSIX_VECTOR_PER_VQ_AND_CONFIG 1 46 /* all vqs share a vector, and config interrupt has a separate vector */ 47 #define MSIX_VECTOR_SHARED_VQ_AND_CONFIG 2 48 /* all vqs and config interrupt share a vector */ 49 #define MSIX_VECTOR_DEV_SHARED 3 50 51 struct vring_info { 52 u64 desc; 53 u64 avail; 54 u64 used; 55 u16 size; 56 u16 last_avail_idx; 57 bool ready; 58 void __iomem *notify_addr; 59 phys_addr_t notify_pa; 60 u32 irq; 61 struct vdpa_callback cb; 62 char msix_name[256]; 63 }; 64 65 struct ifcvf_hw { 66 u8 __iomem *isr; 67 /* Live migration */ 68 u8 __iomem *lm_cfg; 69 /* Notification bar number */ 70 u8 notify_bar; 71 u8 msix_vector_status; 72 /* virtio-net or virtio-blk device config size */ 73 u32 config_size; 74 /* Notificaiton bar address */ 75 void __iomem *notify_base; 76 phys_addr_t notify_base_pa; 77 u32 notify_off_multiplier; 78 u32 dev_type; 79 u64 req_features; 80 u64 hw_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 }; 91 92 struct ifcvf_adapter { 93 struct vdpa_device vdpa; 94 struct pci_dev *pdev; 95 struct ifcvf_hw vf; 96 }; 97 98 struct ifcvf_vring_lm_cfg { 99 u32 idx_addr[2]; 100 u8 reserved[IFCVF_LM_CFG_SIZE - 8]; 101 }; 102 103 struct ifcvf_lm_cfg { 104 u8 reserved[IFCVF_LM_RING_STATE_OFFSET]; 105 struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUES]; 106 }; 107 108 struct ifcvf_vdpa_mgmt_dev { 109 struct vdpa_mgmt_dev mdev; 110 struct ifcvf_adapter *adapter; 111 struct pci_dev *pdev; 112 }; 113 114 int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev); 115 int ifcvf_start_hw(struct ifcvf_hw *hw); 116 void ifcvf_stop_hw(struct ifcvf_hw *hw); 117 void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid); 118 void ifcvf_read_dev_config(struct ifcvf_hw *hw, u64 offset, 119 void *dst, int length); 120 void ifcvf_write_dev_config(struct ifcvf_hw *hw, u64 offset, 121 const void *src, int length); 122 u8 ifcvf_get_status(struct ifcvf_hw *hw); 123 void ifcvf_set_status(struct ifcvf_hw *hw, u8 status); 124 void io_write64_twopart(u64 val, u32 *lo, u32 *hi); 125 void ifcvf_reset(struct ifcvf_hw *hw); 126 u64 ifcvf_get_features(struct ifcvf_hw *hw); 127 u64 ifcvf_get_hw_features(struct ifcvf_hw *hw); 128 int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features); 129 u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid); 130 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num); 131 struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw); 132 int ifcvf_probed_virtio_net(struct ifcvf_hw *hw); 133 u32 ifcvf_get_config_size(struct ifcvf_hw *hw); 134 u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector); 135 u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector); 136 #endif /* _IFCVF_H_ */ 137