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 <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> 21 22 #define N3000_DEVICE_ID 0x1041 23 #define N3000_SUBSYS_DEVICE_ID 0x001A 24 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)) 33 34 /* Only one queue pair for now. */ 35 #define IFCVF_MAX_QUEUE_PAIRS 1 36 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 42 43 #define IFCVF_LM_CFG_SIZE 0x40 44 #define IFCVF_LM_RING_STATE_OFFSET 0x20 45 #define IFCVF_LM_BAR 4 46 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__) 50 51 #define ifcvf_private_to_vf(adapter) \ 52 (&((struct ifcvf_adapter *)adapter)->vf) 53 54 #define IFCVF_MAX_INTR (IFCVF_MAX_QUEUE_PAIRS * 2 + 1) 55 56 struct vring_info { 57 u64 desc; 58 u64 avail; 59 u64 used; 60 u16 size; 61 u16 last_avail_idx; 62 bool ready; 63 void __iomem *notify_addr; 64 phys_addr_t notify_pa; 65 u32 irq; 66 struct vdpa_callback cb; 67 char msix_name[256]; 68 }; 69 70 struct ifcvf_hw { 71 u8 __iomem *isr; 72 /* Live migration */ 73 u8 __iomem *lm_cfg; 74 u16 nr_vring; 75 /* Notification bar number */ 76 u8 notify_bar; 77 /* Notificaiton bar address */ 78 void __iomem *notify_base; 79 phys_addr_t notify_base_pa; 80 u32 notify_off_multiplier; 81 u64 req_features; 82 u64 hw_features; 83 u32 dev_type; 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; 91 }; 92 93 struct ifcvf_adapter { 94 struct vdpa_device vdpa; 95 struct pci_dev *pdev; 96 struct ifcvf_hw vf; 97 }; 98 99 struct ifcvf_vring_lm_cfg { 100 u32 idx_addr[2]; 101 u8 reserved[IFCVF_LM_CFG_SIZE - 8]; 102 }; 103 104 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]; 107 }; 108 109 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_ */ 129