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 49 struct 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 63 struct 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 95 struct ifcvf_adapter { 96 struct vdpa_device vdpa; 97 struct pci_dev *pdev; 98 struct ifcvf_hw *vf; 99 }; 100 101 struct ifcvf_vring_lm_cfg { 102 u32 idx_addr[2]; 103 u8 reserved[IFCVF_LM_CFG_SIZE - 8]; 104 }; 105 106 struct ifcvf_lm_cfg { 107 u8 reserved[IFCVF_LM_RING_STATE_OFFSET]; 108 struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUES]; 109 }; 110 111 struct 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 }; 117 118 int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev); 119 int ifcvf_start_hw(struct ifcvf_hw *hw); 120 void ifcvf_stop_hw(struct ifcvf_hw *hw); 121 void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid); 122 void ifcvf_read_dev_config(struct ifcvf_hw *hw, u64 offset, 123 void *dst, int length); 124 void ifcvf_write_dev_config(struct ifcvf_hw *hw, u64 offset, 125 const void *src, int length); 126 u8 ifcvf_get_status(struct ifcvf_hw *hw); 127 void ifcvf_set_status(struct ifcvf_hw *hw, u8 status); 128 void io_write64_twopart(u64 val, u32 *lo, u32 *hi); 129 void ifcvf_reset(struct ifcvf_hw *hw); 130 u64 ifcvf_get_features(struct ifcvf_hw *hw); 131 u64 ifcvf_get_hw_features(struct ifcvf_hw *hw); 132 int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features); 133 u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid); 134 int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num); 135 struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw); 136 int ifcvf_probed_virtio_net(struct ifcvf_hw *hw); 137 u32 ifcvf_get_config_size(struct ifcvf_hw *hw); 138 u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector); 139 u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector); 140 #endif /* _IFCVF_H_ */ 141