1 /* 2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #ifndef RXE_LOC_H 35 #define RXE_LOC_H 36 37 /* rxe_av.c */ 38 39 int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr); 40 41 int rxe_av_from_attr(struct rxe_dev *rxe, u8 port_num, 42 struct rxe_av *av, struct rdma_ah_attr *attr); 43 44 int rxe_av_to_attr(struct rxe_dev *rxe, struct rxe_av *av, 45 struct rdma_ah_attr *attr); 46 47 int rxe_av_fill_ip_info(struct rxe_dev *rxe, 48 struct rxe_av *av, 49 struct rdma_ah_attr *attr, 50 struct ib_gid_attr *sgid_attr, 51 union ib_gid *sgid); 52 53 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt); 54 55 /* rxe_cq.c */ 56 int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq, 57 int cqe, int comp_vector, struct ib_udata *udata); 58 59 int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe, 60 int comp_vector, struct ib_ucontext *context, 61 struct ib_udata *udata); 62 63 int rxe_cq_resize_queue(struct rxe_cq *cq, int new_cqe, struct ib_udata *udata); 64 65 int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited); 66 67 void rxe_cq_disable(struct rxe_cq *cq); 68 69 void rxe_cq_cleanup(struct rxe_pool_entry *arg); 70 71 /* rxe_mcast.c */ 72 int rxe_mcast_get_grp(struct rxe_dev *rxe, union ib_gid *mgid, 73 struct rxe_mc_grp **grp_p); 74 75 int rxe_mcast_add_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp, 76 struct rxe_mc_grp *grp); 77 78 int rxe_mcast_drop_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp, 79 union ib_gid *mgid); 80 81 void rxe_drop_all_mcast_groups(struct rxe_qp *qp); 82 83 void rxe_mc_cleanup(struct rxe_pool_entry *arg); 84 85 /* rxe_mmap.c */ 86 struct rxe_mmap_info { 87 struct list_head pending_mmaps; 88 struct ib_ucontext *context; 89 struct kref ref; 90 void *obj; 91 92 struct mminfo info; 93 }; 94 95 void rxe_mmap_release(struct kref *ref); 96 97 struct rxe_mmap_info *rxe_create_mmap_info(struct rxe_dev *dev, 98 u32 size, 99 struct ib_ucontext *context, 100 void *obj); 101 102 int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma); 103 104 /* rxe_mr.c */ 105 enum copy_direction { 106 to_mem_obj, 107 from_mem_obj, 108 }; 109 110 int rxe_mem_init_dma(struct rxe_dev *rxe, struct rxe_pd *pd, 111 int access, struct rxe_mem *mem); 112 113 int rxe_mem_init_user(struct rxe_dev *rxe, struct rxe_pd *pd, u64 start, 114 u64 length, u64 iova, int access, struct ib_udata *udata, 115 struct rxe_mem *mr); 116 117 int rxe_mem_init_fast(struct rxe_dev *rxe, struct rxe_pd *pd, 118 int max_pages, struct rxe_mem *mem); 119 120 int rxe_mem_copy(struct rxe_mem *mem, u64 iova, void *addr, 121 int length, enum copy_direction dir, u32 *crcp); 122 123 int copy_data(struct rxe_dev *rxe, struct rxe_pd *pd, int access, 124 struct rxe_dma_info *dma, void *addr, int length, 125 enum copy_direction dir, u32 *crcp); 126 127 void *iova_to_vaddr(struct rxe_mem *mem, u64 iova, int length); 128 129 enum lookup_type { 130 lookup_local, 131 lookup_remote, 132 }; 133 134 struct rxe_mem *lookup_mem(struct rxe_pd *pd, int access, u32 key, 135 enum lookup_type type); 136 137 int mem_check_range(struct rxe_mem *mem, u64 iova, size_t length); 138 139 int rxe_mem_map_pages(struct rxe_dev *rxe, struct rxe_mem *mem, 140 u64 *page, int num_pages, u64 iova); 141 142 void rxe_mem_cleanup(struct rxe_pool_entry *arg); 143 144 int advance_dma_data(struct rxe_dma_info *dma, unsigned int length); 145 146 /* rxe_net.c */ 147 int rxe_loopback(struct sk_buff *skb); 148 int rxe_send(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 149 struct sk_buff *skb); 150 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 151 int paylen, struct rxe_pkt_info *pkt); 152 int rxe_prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 153 struct sk_buff *skb, u32 *crc); 154 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num); 155 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num); 156 struct device *rxe_dma_device(struct rxe_dev *rxe); 157 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid); 158 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid); 159 160 /* rxe_qp.c */ 161 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init); 162 163 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 164 struct ib_qp_init_attr *init, struct ib_udata *udata, 165 struct ib_pd *ibpd); 166 167 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init); 168 169 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 170 struct ib_qp_attr *attr, int mask); 171 172 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, 173 int mask, struct ib_udata *udata); 174 175 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask); 176 177 void rxe_qp_error(struct rxe_qp *qp); 178 179 void rxe_qp_destroy(struct rxe_qp *qp); 180 181 void rxe_qp_cleanup(struct rxe_pool_entry *arg); 182 183 static inline int qp_num(struct rxe_qp *qp) 184 { 185 return qp->ibqp.qp_num; 186 } 187 188 static inline enum ib_qp_type qp_type(struct rxe_qp *qp) 189 { 190 return qp->ibqp.qp_type; 191 } 192 193 static inline enum ib_qp_state qp_state(struct rxe_qp *qp) 194 { 195 return qp->attr.qp_state; 196 } 197 198 static inline int qp_mtu(struct rxe_qp *qp) 199 { 200 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) 201 return qp->attr.path_mtu; 202 else 203 return RXE_PORT_MAX_MTU; 204 } 205 206 static inline int rcv_wqe_size(int max_sge) 207 { 208 return sizeof(struct rxe_recv_wqe) + 209 max_sge * sizeof(struct ib_sge); 210 } 211 212 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res); 213 214 static inline void rxe_advance_resp_resource(struct rxe_qp *qp) 215 { 216 qp->resp.res_head++; 217 if (unlikely(qp->resp.res_head == qp->attr.max_dest_rd_atomic)) 218 qp->resp.res_head = 0; 219 } 220 221 void retransmit_timer(unsigned long data); 222 void rnr_nak_timer(unsigned long data); 223 224 /* rxe_srq.c */ 225 #define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT) 226 227 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq, 228 struct ib_srq_attr *attr, enum ib_srq_attr_mask mask); 229 230 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq, 231 struct ib_srq_init_attr *init, 232 struct ib_ucontext *context, struct ib_udata *udata); 233 234 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq, 235 struct ib_srq_attr *attr, enum ib_srq_attr_mask mask, 236 struct ib_udata *udata); 237 238 void rxe_release(struct kref *kref); 239 240 void rxe_drain_req_pkts(struct rxe_qp *qp, bool notify); 241 int rxe_completer(void *arg); 242 int rxe_requester(void *arg); 243 int rxe_responder(void *arg); 244 245 u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb); 246 247 void rxe_resp_queue_pkt(struct rxe_dev *rxe, 248 struct rxe_qp *qp, struct sk_buff *skb); 249 250 void rxe_comp_queue_pkt(struct rxe_dev *rxe, 251 struct rxe_qp *qp, struct sk_buff *skb); 252 253 static inline unsigned int wr_opcode_mask(int opcode, struct rxe_qp *qp) 254 { 255 return rxe_wr_opcode_info[opcode].mask[qp->ibqp.qp_type]; 256 } 257 258 static inline int rxe_xmit_packet(struct rxe_dev *rxe, struct rxe_qp *qp, 259 struct rxe_pkt_info *pkt, struct sk_buff *skb) 260 { 261 int err; 262 int is_request = pkt->mask & RXE_REQ_MASK; 263 264 if ((is_request && (qp->req.state != QP_STATE_READY)) || 265 (!is_request && (qp->resp.state != QP_STATE_READY))) { 266 pr_info("Packet dropped. QP is not in ready state\n"); 267 goto drop; 268 } 269 270 if (pkt->mask & RXE_LOOPBACK_MASK) { 271 memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt)); 272 err = rxe_loopback(skb); 273 } else { 274 err = rxe_send(rxe, pkt, skb); 275 } 276 277 if (err) { 278 rxe->xmit_errors++; 279 rxe_counter_inc(rxe, RXE_CNT_SEND_ERR); 280 return err; 281 } 282 283 if ((qp_type(qp) != IB_QPT_RC) && 284 (pkt->mask & RXE_END_MASK)) { 285 pkt->wqe->state = wqe_state_done; 286 rxe_run_task(&qp->comp.task, 1); 287 } 288 289 rxe_counter_inc(rxe, RXE_CNT_SENT_PKTS); 290 goto done; 291 292 drop: 293 kfree_skb(skb); 294 err = 0; 295 done: 296 return err; 297 } 298 299 #endif /* RXE_LOC_H */ 300