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 void rxe_av_from_attr(u8 port_num, struct rxe_av *av, 42 struct rdma_ah_attr *attr); 43 44 void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr); 45 46 void rxe_av_fill_ip_info(struct rxe_av *av, 47 struct rdma_ah_attr *attr, 48 struct ib_gid_attr *sgid_attr, 49 union ib_gid *sgid); 50 51 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt); 52 53 /* rxe_cq.c */ 54 int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq, 55 int cqe, int comp_vector, struct ib_udata *udata); 56 57 int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe, 58 int comp_vector, struct ib_ucontext *context, 59 struct ib_udata *udata); 60 61 int rxe_cq_resize_queue(struct rxe_cq *cq, int new_cqe, struct ib_udata *udata); 62 63 int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited); 64 65 void rxe_cq_disable(struct rxe_cq *cq); 66 67 void rxe_cq_cleanup(struct rxe_pool_entry *arg); 68 69 /* rxe_mcast.c */ 70 int rxe_mcast_get_grp(struct rxe_dev *rxe, union ib_gid *mgid, 71 struct rxe_mc_grp **grp_p); 72 73 int rxe_mcast_add_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp, 74 struct rxe_mc_grp *grp); 75 76 int rxe_mcast_drop_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp, 77 union ib_gid *mgid); 78 79 void rxe_drop_all_mcast_groups(struct rxe_qp *qp); 80 81 void rxe_mc_cleanup(struct rxe_pool_entry *arg); 82 83 /* rxe_mmap.c */ 84 struct rxe_mmap_info { 85 struct list_head pending_mmaps; 86 struct ib_ucontext *context; 87 struct kref ref; 88 void *obj; 89 90 struct mminfo info; 91 }; 92 93 void rxe_mmap_release(struct kref *ref); 94 95 struct rxe_mmap_info *rxe_create_mmap_info(struct rxe_dev *dev, 96 u32 size, 97 struct ib_ucontext *context, 98 void *obj); 99 100 int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma); 101 102 /* rxe_mr.c */ 103 enum copy_direction { 104 to_mem_obj, 105 from_mem_obj, 106 }; 107 108 int rxe_mem_init_dma(struct rxe_dev *rxe, struct rxe_pd *pd, 109 int access, struct rxe_mem *mem); 110 111 int rxe_mem_init_user(struct rxe_dev *rxe, struct rxe_pd *pd, u64 start, 112 u64 length, u64 iova, int access, struct ib_udata *udata, 113 struct rxe_mem *mr); 114 115 int rxe_mem_init_fast(struct rxe_dev *rxe, struct rxe_pd *pd, 116 int max_pages, struct rxe_mem *mem); 117 118 int rxe_mem_copy(struct rxe_mem *mem, u64 iova, void *addr, 119 int length, enum copy_direction dir, u32 *crcp); 120 121 int copy_data(struct rxe_dev *rxe, struct rxe_pd *pd, int access, 122 struct rxe_dma_info *dma, void *addr, int length, 123 enum copy_direction dir, u32 *crcp); 124 125 void *iova_to_vaddr(struct rxe_mem *mem, u64 iova, int length); 126 127 enum lookup_type { 128 lookup_local, 129 lookup_remote, 130 }; 131 132 struct rxe_mem *lookup_mem(struct rxe_pd *pd, int access, u32 key, 133 enum lookup_type type); 134 135 int mem_check_range(struct rxe_mem *mem, u64 iova, size_t length); 136 137 int rxe_mem_map_pages(struct rxe_dev *rxe, struct rxe_mem *mem, 138 u64 *page, int num_pages, u64 iova); 139 140 void rxe_mem_cleanup(struct rxe_pool_entry *arg); 141 142 int advance_dma_data(struct rxe_dma_info *dma, unsigned int length); 143 144 /* rxe_net.c */ 145 int rxe_loopback(struct sk_buff *skb); 146 int rxe_send(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 147 struct sk_buff *skb); 148 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 149 int paylen, struct rxe_pkt_info *pkt); 150 int rxe_prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, 151 struct sk_buff *skb, u32 *crc); 152 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num); 153 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num); 154 struct device *rxe_dma_device(struct rxe_dev *rxe); 155 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid); 156 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid); 157 158 /* rxe_qp.c */ 159 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init); 160 161 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 162 struct ib_qp_init_attr *init, struct ib_udata *udata, 163 struct ib_pd *ibpd); 164 165 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init); 166 167 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 168 struct ib_qp_attr *attr, int mask); 169 170 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, 171 int mask, struct ib_udata *udata); 172 173 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask); 174 175 void rxe_qp_error(struct rxe_qp *qp); 176 177 void rxe_qp_destroy(struct rxe_qp *qp); 178 179 void rxe_qp_cleanup(struct rxe_pool_entry *arg); 180 181 static inline int qp_num(struct rxe_qp *qp) 182 { 183 return qp->ibqp.qp_num; 184 } 185 186 static inline enum ib_qp_type qp_type(struct rxe_qp *qp) 187 { 188 return qp->ibqp.qp_type; 189 } 190 191 static inline enum ib_qp_state qp_state(struct rxe_qp *qp) 192 { 193 return qp->attr.qp_state; 194 } 195 196 static inline int qp_mtu(struct rxe_qp *qp) 197 { 198 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) 199 return qp->attr.path_mtu; 200 else 201 return RXE_PORT_MAX_MTU; 202 } 203 204 static inline int rcv_wqe_size(int max_sge) 205 { 206 return sizeof(struct rxe_recv_wqe) + 207 max_sge * sizeof(struct ib_sge); 208 } 209 210 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res); 211 212 static inline void rxe_advance_resp_resource(struct rxe_qp *qp) 213 { 214 qp->resp.res_head++; 215 if (unlikely(qp->resp.res_head == qp->attr.max_dest_rd_atomic)) 216 qp->resp.res_head = 0; 217 } 218 219 void retransmit_timer(struct timer_list *t); 220 void rnr_nak_timer(struct timer_list *t); 221 222 /* rxe_srq.c */ 223 #define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT) 224 225 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq, 226 struct ib_srq_attr *attr, enum ib_srq_attr_mask mask); 227 228 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq, 229 struct ib_srq_init_attr *init, 230 struct ib_ucontext *context, struct ib_udata *udata); 231 232 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq, 233 struct ib_srq_attr *attr, enum ib_srq_attr_mask mask, 234 struct ib_udata *udata); 235 236 void rxe_release(struct kref *kref); 237 238 int rxe_completer(void *arg); 239 int rxe_requester(void *arg); 240 int rxe_responder(void *arg); 241 242 u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb); 243 244 void rxe_resp_queue_pkt(struct rxe_dev *rxe, 245 struct rxe_qp *qp, struct sk_buff *skb); 246 247 void rxe_comp_queue_pkt(struct rxe_dev *rxe, 248 struct rxe_qp *qp, struct sk_buff *skb); 249 250 static inline unsigned int wr_opcode_mask(int opcode, struct rxe_qp *qp) 251 { 252 return rxe_wr_opcode_info[opcode].mask[qp->ibqp.qp_type]; 253 } 254 255 static inline int rxe_xmit_packet(struct rxe_dev *rxe, struct rxe_qp *qp, 256 struct rxe_pkt_info *pkt, struct sk_buff *skb) 257 { 258 int err; 259 int is_request = pkt->mask & RXE_REQ_MASK; 260 261 if ((is_request && (qp->req.state != QP_STATE_READY)) || 262 (!is_request && (qp->resp.state != QP_STATE_READY))) { 263 pr_info("Packet dropped. QP is not in ready state\n"); 264 goto drop; 265 } 266 267 if (pkt->mask & RXE_LOOPBACK_MASK) { 268 memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt)); 269 err = rxe_loopback(skb); 270 } else { 271 err = rxe_send(rxe, pkt, skb); 272 } 273 274 if (err) { 275 rxe->xmit_errors++; 276 rxe_counter_inc(rxe, RXE_CNT_SEND_ERR); 277 return err; 278 } 279 280 if ((qp_type(qp) != IB_QPT_RC) && 281 (pkt->mask & RXE_END_MASK)) { 282 pkt->wqe->state = wqe_state_done; 283 rxe_run_task(&qp->comp.task, 1); 284 } 285 286 rxe_counter_inc(rxe, RXE_CNT_SENT_PKTS); 287 goto done; 288 289 drop: 290 kfree_skb(skb); 291 err = 0; 292 done: 293 return err; 294 } 295 296 #endif /* RXE_LOC_H */ 297