1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ 2 /* Copyright (c) 2020 Mellanox Technologies Ltd. */ 3 4 #ifndef __MLX5_VDPA_H__ 5 #define __MLX5_VDPA_H__ 6 7 #include <linux/etherdevice.h> 8 #include <linux/vringh.h> 9 #include <linux/vdpa.h> 10 #include <linux/mlx5/driver.h> 11 12 #define MLX5V_ETH_HARD_MTU (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN) 13 14 struct mlx5_vdpa_direct_mr { 15 u64 start; 16 u64 end; 17 u32 perm; 18 u32 mr; 19 struct sg_table sg_head; 20 int log_size; 21 int nsg; 22 int nent; 23 struct list_head list; 24 u64 offset; 25 }; 26 27 struct mlx5_vdpa_mr { 28 u32 mkey; 29 30 /* list of direct MRs descendants of this indirect mr */ 31 struct list_head head; 32 unsigned long num_directs; 33 unsigned long num_klms; 34 bool initialized; 35 36 /* serialize mkey creation and destruction */ 37 struct mutex mkey_mtx; 38 bool user_mr; 39 }; 40 41 struct mlx5_vdpa_resources { 42 u32 pdn; 43 struct mlx5_uars_page *uar; 44 void __iomem *kick_addr; 45 u64 phys_kick_addr; 46 u16 uid; 47 u32 null_mkey; 48 bool valid; 49 }; 50 51 struct mlx5_control_vq { 52 struct vhost_iotlb *iotlb; 53 /* spinlock to synchronize iommu table */ 54 spinlock_t iommu_lock; 55 struct vringh vring; 56 bool ready; 57 u64 desc_addr; 58 u64 device_addr; 59 u64 driver_addr; 60 struct vdpa_callback event_cb; 61 struct vringh_kiov riov; 62 struct vringh_kiov wiov; 63 unsigned short head; 64 unsigned int received_desc; 65 unsigned int completed_desc; 66 }; 67 68 struct mlx5_vdpa_wq_ent { 69 struct work_struct work; 70 struct mlx5_vdpa_dev *mvdev; 71 }; 72 73 enum { 74 MLX5_VDPA_DATAVQ_GROUP, 75 MLX5_VDPA_CVQ_GROUP, 76 MLX5_VDPA_NUMVQ_GROUPS 77 }; 78 79 enum { 80 MLX5_VDPA_NUM_AS = MLX5_VDPA_NUMVQ_GROUPS 81 }; 82 83 struct mlx5_vdpa_dev { 84 struct vdpa_device vdev; 85 struct mlx5_core_dev *mdev; 86 struct mlx5_vdpa_resources res; 87 88 u64 mlx_features; 89 u64 actual_features; 90 u8 status; 91 u32 max_vqs; 92 u16 max_idx; 93 u32 generation; 94 95 struct mlx5_vdpa_mr mr; 96 struct mlx5_control_vq cvq; 97 struct workqueue_struct *wq; 98 unsigned int group2asid[MLX5_VDPA_NUMVQ_GROUPS]; 99 bool suspended; 100 }; 101 102 int mlx5_vdpa_alloc_pd(struct mlx5_vdpa_dev *dev, u32 *pdn, u16 uid); 103 int mlx5_vdpa_dealloc_pd(struct mlx5_vdpa_dev *dev, u32 pdn, u16 uid); 104 int mlx5_vdpa_get_null_mkey(struct mlx5_vdpa_dev *dev, u32 *null_mkey); 105 int mlx5_vdpa_create_tis(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tisn); 106 void mlx5_vdpa_destroy_tis(struct mlx5_vdpa_dev *mvdev, u32 tisn); 107 int mlx5_vdpa_create_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 *rqtn); 108 int mlx5_vdpa_modify_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 rqtn); 109 void mlx5_vdpa_destroy_rqt(struct mlx5_vdpa_dev *mvdev, u32 rqtn); 110 int mlx5_vdpa_create_tir(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tirn); 111 void mlx5_vdpa_destroy_tir(struct mlx5_vdpa_dev *mvdev, u32 tirn); 112 int mlx5_vdpa_alloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 *tdn); 113 void mlx5_vdpa_dealloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 tdn); 114 int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev); 115 void mlx5_vdpa_free_resources(struct mlx5_vdpa_dev *mvdev); 116 int mlx5_vdpa_create_mkey(struct mlx5_vdpa_dev *mvdev, u32 *mkey, u32 *in, 117 int inlen); 118 int mlx5_vdpa_destroy_mkey(struct mlx5_vdpa_dev *mvdev, u32 mkey); 119 int mlx5_vdpa_handle_set_map(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb, 120 bool *change_map, unsigned int asid); 121 int mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, struct vhost_iotlb *iotlb, 122 unsigned int asid); 123 void mlx5_vdpa_destroy_mr(struct mlx5_vdpa_dev *mvdev); 124 125 #define mlx5_vdpa_warn(__dev, format, ...) \ 126 dev_warn((__dev)->mdev->device, "%s:%d:(pid %d) warning: " format, __func__, __LINE__, \ 127 current->pid, ##__VA_ARGS__) 128 129 #define mlx5_vdpa_info(__dev, format, ...) \ 130 dev_info((__dev)->mdev->device, "%s:%d:(pid %d): " format, __func__, __LINE__, \ 131 current->pid, ##__VA_ARGS__) 132 133 #define mlx5_vdpa_dbg(__dev, format, ...) \ 134 dev_debug((__dev)->mdev->device, "%s:%d:(pid %d): " format, __func__, __LINE__, \ 135 current->pid, ##__VA_ARGS__) 136 137 #endif /* __MLX5_VDPA_H__ */ 138