1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ 2 3 /* Authors: Cheng Xu <chengyou@linux.alibaba.com> */ 4 /* Kai Shen <kaishen@linux.alibaba.com> */ 5 /* Copyright (c) 2020-2022, Alibaba Group. */ 6 7 #ifndef __ERDMA_VERBS_H__ 8 #define __ERDMA_VERBS_H__ 9 10 #include "erdma.h" 11 12 /* RDMA Capability. */ 13 #define ERDMA_MAX_PD (128 * 1024) 14 #define ERDMA_MAX_SEND_WR 4096 15 #define ERDMA_MAX_ORD 128 16 #define ERDMA_MAX_IRD 128 17 #define ERDMA_MAX_SGE_RD 1 18 #define ERDMA_MAX_CONTEXT (128 * 1024) 19 #define ERDMA_MAX_SEND_SGE 6 20 #define ERDMA_MAX_RECV_SGE 1 21 #define ERDMA_MAX_INLINE (sizeof(struct erdma_sge) * (ERDMA_MAX_SEND_SGE)) 22 #define ERDMA_MAX_FRMR_PA 512 23 24 enum { 25 ERDMA_MMAP_IO_NC = 0, /* no cache */ 26 }; 27 28 struct erdma_user_mmap_entry { 29 struct rdma_user_mmap_entry rdma_entry; 30 u64 address; 31 u8 mmap_flag; 32 }; 33 34 struct erdma_ucontext { 35 struct ib_ucontext ibucontext; 36 37 u32 sdb_type; 38 u32 sdb_idx; 39 u32 sdb_page_idx; 40 u32 sdb_page_off; 41 u64 sdb; 42 u64 rdb; 43 u64 cdb; 44 45 struct rdma_user_mmap_entry *sq_db_mmap_entry; 46 struct rdma_user_mmap_entry *rq_db_mmap_entry; 47 struct rdma_user_mmap_entry *cq_db_mmap_entry; 48 49 /* doorbell records */ 50 struct list_head dbrecords_page_list; 51 struct mutex dbrecords_page_mutex; 52 }; 53 54 struct erdma_pd { 55 struct ib_pd ibpd; 56 u32 pdn; 57 }; 58 59 /* 60 * MemoryRegion definition. 61 */ 62 #define ERDMA_MAX_INLINE_MTT_ENTRIES 4 63 #define MTT_SIZE(mtt_cnt) (mtt_cnt << 3) /* per mtt takes 8 Bytes. */ 64 #define ERDMA_MR_MAX_MTT_CNT 524288 65 #define ERDMA_MTT_ENTRY_SIZE 8 66 67 #define ERDMA_MR_TYPE_NORMAL 0 68 #define ERDMA_MR_TYPE_FRMR 1 69 #define ERDMA_MR_TYPE_DMA 2 70 71 #define ERDMA_MR_INLINE_MTT 0 72 #define ERDMA_MR_INDIRECT_MTT 1 73 74 #define ERDMA_MR_ACC_LR BIT(0) 75 #define ERDMA_MR_ACC_LW BIT(1) 76 #define ERDMA_MR_ACC_RR BIT(2) 77 #define ERDMA_MR_ACC_RW BIT(3) 78 79 static inline u8 to_erdma_access_flags(int access) 80 { 81 return (access & IB_ACCESS_REMOTE_READ ? ERDMA_MR_ACC_RR : 0) | 82 (access & IB_ACCESS_LOCAL_WRITE ? ERDMA_MR_ACC_LW : 0) | 83 (access & IB_ACCESS_REMOTE_WRITE ? ERDMA_MR_ACC_RW : 0); 84 } 85 86 struct erdma_mem { 87 struct ib_umem *umem; 88 void *mtt_buf; 89 u32 mtt_type; 90 u32 page_size; 91 u32 page_offset; 92 u32 page_cnt; 93 u32 mtt_nents; 94 95 u64 va; 96 u64 len; 97 98 u64 mtt_entry[ERDMA_MAX_INLINE_MTT_ENTRIES]; 99 }; 100 101 struct erdma_mr { 102 struct ib_mr ibmr; 103 struct erdma_mem mem; 104 u8 type; 105 u8 access; 106 u8 valid; 107 }; 108 109 struct erdma_user_dbrecords_page { 110 struct list_head list; 111 struct ib_umem *umem; 112 u64 va; 113 int refcnt; 114 }; 115 116 struct erdma_uqp { 117 struct erdma_mem sq_mtt; 118 struct erdma_mem rq_mtt; 119 120 dma_addr_t sq_db_info_dma_addr; 121 dma_addr_t rq_db_info_dma_addr; 122 123 struct erdma_user_dbrecords_page *user_dbr_page; 124 125 u32 rq_offset; 126 }; 127 128 struct erdma_kqp { 129 u16 sq_pi; 130 u16 sq_ci; 131 132 u16 rq_pi; 133 u16 rq_ci; 134 135 u64 *swr_tbl; 136 u64 *rwr_tbl; 137 138 void __iomem *hw_sq_db; 139 void __iomem *hw_rq_db; 140 141 void *sq_buf; 142 dma_addr_t sq_buf_dma_addr; 143 144 void *rq_buf; 145 dma_addr_t rq_buf_dma_addr; 146 147 void *sq_db_info; 148 void *rq_db_info; 149 150 u8 sig_all; 151 }; 152 153 enum erdma_qp_state { 154 ERDMA_QP_STATE_IDLE = 0, 155 ERDMA_QP_STATE_RTR = 1, 156 ERDMA_QP_STATE_RTS = 2, 157 ERDMA_QP_STATE_CLOSING = 3, 158 ERDMA_QP_STATE_TERMINATE = 4, 159 ERDMA_QP_STATE_ERROR = 5, 160 ERDMA_QP_STATE_UNDEF = 7, 161 ERDMA_QP_STATE_COUNT = 8 162 }; 163 164 enum erdma_qp_attr_mask { 165 ERDMA_QP_ATTR_STATE = (1 << 0), 166 ERDMA_QP_ATTR_LLP_HANDLE = (1 << 2), 167 ERDMA_QP_ATTR_ORD = (1 << 3), 168 ERDMA_QP_ATTR_IRD = (1 << 4), 169 ERDMA_QP_ATTR_SQ_SIZE = (1 << 5), 170 ERDMA_QP_ATTR_RQ_SIZE = (1 << 6), 171 ERDMA_QP_ATTR_MPA = (1 << 7) 172 }; 173 174 struct erdma_qp_attrs { 175 enum erdma_qp_state state; 176 enum erdma_cc_alg cc; /* Congestion control algorithm */ 177 u32 sq_size; 178 u32 rq_size; 179 u32 orq_size; 180 u32 irq_size; 181 u32 max_send_sge; 182 u32 max_recv_sge; 183 u32 cookie; 184 #define ERDMA_QP_ACTIVE 0 185 #define ERDMA_QP_PASSIVE 1 186 u8 qp_type; 187 u8 pd_len; 188 }; 189 190 struct erdma_qp { 191 struct ib_qp ibqp; 192 struct kref ref; 193 struct completion safe_free; 194 struct erdma_dev *dev; 195 struct erdma_cep *cep; 196 struct rw_semaphore state_lock; 197 198 union { 199 struct erdma_kqp kern_qp; 200 struct erdma_uqp user_qp; 201 }; 202 203 struct erdma_cq *scq; 204 struct erdma_cq *rcq; 205 206 struct erdma_qp_attrs attrs; 207 spinlock_t lock; 208 }; 209 210 struct erdma_kcq_info { 211 void *qbuf; 212 dma_addr_t qbuf_dma_addr; 213 u32 ci; 214 u32 cmdsn; 215 u32 notify_cnt; 216 217 spinlock_t lock; 218 u8 __iomem *db; 219 u64 *db_record; 220 }; 221 222 struct erdma_ucq_info { 223 struct erdma_mem qbuf_mtt; 224 struct erdma_user_dbrecords_page *user_dbr_page; 225 dma_addr_t db_info_dma_addr; 226 }; 227 228 struct erdma_cq { 229 struct ib_cq ibcq; 230 u32 cqn; 231 232 u32 depth; 233 u32 assoc_eqn; 234 235 union { 236 struct erdma_kcq_info kern_cq; 237 struct erdma_ucq_info user_cq; 238 }; 239 }; 240 241 #define QP_ID(qp) ((qp)->ibqp.qp_num) 242 243 static inline struct erdma_qp *find_qp_by_qpn(struct erdma_dev *dev, int id) 244 { 245 return (struct erdma_qp *)xa_load(&dev->qp_xa, id); 246 } 247 248 static inline struct erdma_cq *find_cq_by_cqn(struct erdma_dev *dev, int id) 249 { 250 return (struct erdma_cq *)xa_load(&dev->cq_xa, id); 251 } 252 253 void erdma_qp_get(struct erdma_qp *qp); 254 void erdma_qp_put(struct erdma_qp *qp); 255 int erdma_modify_qp_internal(struct erdma_qp *qp, struct erdma_qp_attrs *attrs, 256 enum erdma_qp_attr_mask mask); 257 void erdma_qp_llp_close(struct erdma_qp *qp); 258 void erdma_qp_cm_drop(struct erdma_qp *qp); 259 260 static inline struct erdma_ucontext *to_ectx(struct ib_ucontext *ibctx) 261 { 262 return container_of(ibctx, struct erdma_ucontext, ibucontext); 263 } 264 265 static inline struct erdma_pd *to_epd(struct ib_pd *pd) 266 { 267 return container_of(pd, struct erdma_pd, ibpd); 268 } 269 270 static inline struct erdma_mr *to_emr(struct ib_mr *ibmr) 271 { 272 return container_of(ibmr, struct erdma_mr, ibmr); 273 } 274 275 static inline struct erdma_qp *to_eqp(struct ib_qp *qp) 276 { 277 return container_of(qp, struct erdma_qp, ibqp); 278 } 279 280 static inline struct erdma_cq *to_ecq(struct ib_cq *ibcq) 281 { 282 return container_of(ibcq, struct erdma_cq, ibcq); 283 } 284 285 static inline struct erdma_user_mmap_entry * 286 to_emmap(struct rdma_user_mmap_entry *ibmmap) 287 { 288 return container_of(ibmmap, struct erdma_user_mmap_entry, rdma_entry); 289 } 290 291 int erdma_alloc_ucontext(struct ib_ucontext *ibctx, struct ib_udata *data); 292 void erdma_dealloc_ucontext(struct ib_ucontext *ibctx); 293 int erdma_query_device(struct ib_device *dev, struct ib_device_attr *attr, 294 struct ib_udata *data); 295 int erdma_get_port_immutable(struct ib_device *dev, u32 port, 296 struct ib_port_immutable *ib_port_immutable); 297 int erdma_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, 298 struct ib_udata *data); 299 int erdma_query_port(struct ib_device *dev, u32 port, 300 struct ib_port_attr *attr); 301 int erdma_query_gid(struct ib_device *dev, u32 port, int idx, 302 union ib_gid *gid); 303 int erdma_alloc_pd(struct ib_pd *ibpd, struct ib_udata *data); 304 int erdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata); 305 int erdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attr, 306 struct ib_udata *data); 307 int erdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int mask, 308 struct ib_qp_init_attr *init_attr); 309 int erdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int mask, 310 struct ib_udata *data); 311 int erdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata); 312 int erdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata); 313 int erdma_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags); 314 struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len, 315 u64 virt, int access, struct ib_udata *udata); 316 struct ib_mr *erdma_get_dma_mr(struct ib_pd *ibpd, int rights); 317 int erdma_dereg_mr(struct ib_mr *ibmr, struct ib_udata *data); 318 int erdma_mmap(struct ib_ucontext *ctx, struct vm_area_struct *vma); 319 void erdma_mmap_free(struct rdma_user_mmap_entry *rdma_entry); 320 void erdma_qp_get_ref(struct ib_qp *ibqp); 321 void erdma_qp_put_ref(struct ib_qp *ibqp); 322 struct ib_qp *erdma_get_ibqp(struct ib_device *dev, int id); 323 int erdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *send_wr, 324 const struct ib_send_wr **bad_send_wr); 325 int erdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *recv_wr, 326 const struct ib_recv_wr **bad_recv_wr); 327 int erdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc); 328 struct ib_mr *erdma_ib_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, 329 u32 max_num_sg); 330 int erdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, 331 unsigned int *sg_offset); 332 void erdma_port_event(struct erdma_dev *dev, enum ib_event_type reason); 333 void erdma_set_mtu(struct erdma_dev *dev, u32 mtu); 334 335 #endif 336