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 35 struct vhost_iotlb *iotlb; 36 37 bool user_mr; 38 39 refcount_t refcount; 40 struct list_head mr_list; 41 }; 42 43 struct mlx5_vdpa_resources { 44 u32 pdn; 45 struct mlx5_uars_page *uar; 46 void __iomem *kick_addr; 47 u64 phys_kick_addr; 48 u16 uid; 49 u32 null_mkey; 50 bool valid; 51 }; 52 53 struct mlx5_control_vq { 54 struct vhost_iotlb *iotlb; 55 /* spinlock to synchronize iommu table */ 56 spinlock_t iommu_lock; 57 struct vringh vring; 58 bool ready; 59 u64 desc_addr; 60 u64 device_addr; 61 u64 driver_addr; 62 struct vdpa_callback event_cb; 63 struct vringh_kiov riov; 64 struct vringh_kiov wiov; 65 unsigned short head; 66 unsigned int received_desc; 67 unsigned int completed_desc; 68 }; 69 70 struct mlx5_vdpa_wq_ent { 71 struct work_struct work; 72 struct mlx5_vdpa_dev *mvdev; 73 }; 74 75 enum { 76 MLX5_VDPA_DATAVQ_GROUP, 77 MLX5_VDPA_CVQ_GROUP, 78 MLX5_VDPA_DATAVQ_DESC_GROUP, 79 MLX5_VDPA_NUMVQ_GROUPS 80 }; 81 82 enum { 83 MLX5_VDPA_NUM_AS = 2 84 }; 85 86 struct mlx5_vdpa_dev { 87 struct vdpa_device vdev; 88 struct mlx5_core_dev *mdev; 89 struct mlx5_vdpa_resources res; 90 91 u64 mlx_features; 92 u64 actual_features; 93 u8 status; 94 u32 max_vqs; 95 u16 max_idx; 96 u32 generation; 97 98 struct mlx5_vdpa_mr *mr[MLX5_VDPA_NUM_AS]; 99 struct list_head mr_list_head; 100 /* serialize mr access */ 101 struct mutex mr_mtx; 102 struct mlx5_control_vq cvq; 103 struct workqueue_struct *wq; 104 unsigned int group2asid[MLX5_VDPA_NUMVQ_GROUPS]; 105 bool suspended; 106 }; 107 108 int mlx5_vdpa_create_tis(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tisn); 109 void mlx5_vdpa_destroy_tis(struct mlx5_vdpa_dev *mvdev, u32 tisn); 110 int mlx5_vdpa_create_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 *rqtn); 111 int mlx5_vdpa_modify_rqt(struct mlx5_vdpa_dev *mvdev, void *in, int inlen, u32 rqtn); 112 void mlx5_vdpa_destroy_rqt(struct mlx5_vdpa_dev *mvdev, u32 rqtn); 113 int mlx5_vdpa_create_tir(struct mlx5_vdpa_dev *mvdev, void *in, u32 *tirn); 114 void mlx5_vdpa_destroy_tir(struct mlx5_vdpa_dev *mvdev, u32 tirn); 115 int mlx5_vdpa_alloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 *tdn); 116 void mlx5_vdpa_dealloc_transport_domain(struct mlx5_vdpa_dev *mvdev, u32 tdn); 117 int mlx5_vdpa_alloc_resources(struct mlx5_vdpa_dev *mvdev); 118 void mlx5_vdpa_free_resources(struct mlx5_vdpa_dev *mvdev); 119 int mlx5_vdpa_create_mkey(struct mlx5_vdpa_dev *mvdev, u32 *mkey, u32 *in, 120 int inlen); 121 int mlx5_vdpa_destroy_mkey(struct mlx5_vdpa_dev *mvdev, u32 mkey); 122 struct mlx5_vdpa_mr *mlx5_vdpa_create_mr(struct mlx5_vdpa_dev *mvdev, 123 struct vhost_iotlb *iotlb); 124 void mlx5_vdpa_destroy_mr_resources(struct mlx5_vdpa_dev *mvdev); 125 void mlx5_vdpa_get_mr(struct mlx5_vdpa_dev *mvdev, 126 struct mlx5_vdpa_mr *mr); 127 void mlx5_vdpa_put_mr(struct mlx5_vdpa_dev *mvdev, 128 struct mlx5_vdpa_mr *mr); 129 void mlx5_vdpa_update_mr(struct mlx5_vdpa_dev *mvdev, 130 struct mlx5_vdpa_mr *mr, 131 unsigned int asid); 132 int mlx5_vdpa_update_cvq_iotlb(struct mlx5_vdpa_dev *mvdev, 133 struct vhost_iotlb *iotlb, 134 unsigned int asid); 135 int mlx5_vdpa_create_dma_mr(struct mlx5_vdpa_dev *mvdev); 136 int mlx5_vdpa_reset_mr(struct mlx5_vdpa_dev *mvdev, unsigned int asid); 137 138 #define mlx5_vdpa_warn(__dev, format, ...) \ 139 dev_warn((__dev)->mdev->device, "%s:%d:(pid %d) warning: " format, __func__, __LINE__, \ 140 current->pid, ##__VA_ARGS__) 141 142 #define mlx5_vdpa_info(__dev, format, ...) \ 143 dev_info((__dev)->mdev->device, "%s:%d:(pid %d): " format, __func__, __LINE__, \ 144 current->pid, ##__VA_ARGS__) 145 146 #define mlx5_vdpa_dbg(__dev, format, ...) \ 147 dev_debug((__dev)->mdev->device, "%s:%d:(pid %d): " format, __func__, __LINE__, \ 148 current->pid, ##__VA_ARGS__) 149 150 #endif /* __MLX5_VDPA_H__ */ 151