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 void rxe_init_av(struct rdma_ah_attr *attr, struct rxe_av *av); 39 40 int rxe_av_chk_attr(struct rxe_dev *rxe, struct rdma_ah_attr *attr); 41 42 void rxe_av_from_attr(u8 port_num, struct rxe_av *av, 43 struct rdma_ah_attr *attr); 44 45 void rxe_av_to_attr(struct rxe_av *av, struct rdma_ah_attr *attr); 46 47 void rxe_av_fill_ip_info(struct rxe_av *av, struct rdma_ah_attr *attr); 48 49 struct rxe_av *rxe_get_av(struct rxe_pkt_info *pkt); 50 51 /* rxe_cq.c */ 52 int rxe_cq_chk_attr(struct rxe_dev *rxe, struct rxe_cq *cq, 53 int cqe, int comp_vector); 54 55 int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe, 56 int comp_vector, struct ib_ucontext *context, 57 struct rxe_create_cq_resp __user *uresp); 58 59 int rxe_cq_resize_queue(struct rxe_cq *cq, int new_cqe, 60 struct rxe_resize_cq_resp __user *uresp); 61 62 int rxe_cq_post(struct rxe_cq *cq, struct rxe_cqe *cqe, int solicited); 63 64 void rxe_cq_disable(struct rxe_cq *cq); 65 66 void rxe_cq_cleanup(struct rxe_pool_entry *arg); 67 68 /* rxe_mcast.c */ 69 int rxe_mcast_get_grp(struct rxe_dev *rxe, union ib_gid *mgid, 70 struct rxe_mc_grp **grp_p); 71 72 int rxe_mcast_add_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp, 73 struct rxe_mc_grp *grp); 74 75 int rxe_mcast_drop_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp, 76 union ib_gid *mgid); 77 78 void rxe_drop_all_mcast_groups(struct rxe_qp *qp); 79 80 void rxe_mc_cleanup(struct rxe_pool_entry *arg); 81 82 /* rxe_mmap.c */ 83 struct rxe_mmap_info { 84 struct list_head pending_mmaps; 85 struct ib_ucontext *context; 86 struct kref ref; 87 void *obj; 88 89 struct mminfo info; 90 }; 91 92 void rxe_mmap_release(struct kref *ref); 93 94 struct rxe_mmap_info *rxe_create_mmap_info(struct rxe_dev *dev, 95 u32 size, 96 struct ib_ucontext *context, 97 void *obj); 98 99 int rxe_mmap(struct ib_ucontext *context, struct vm_area_struct *vma); 100 101 /* rxe_mr.c */ 102 enum copy_direction { 103 to_mem_obj, 104 from_mem_obj, 105 }; 106 107 int rxe_mem_init_dma(struct rxe_pd *pd, 108 int access, struct rxe_mem *mem); 109 110 int rxe_mem_init_user(struct rxe_pd *pd, u64 start, 111 u64 length, u64 iova, int access, struct ib_udata *udata, 112 struct rxe_mem *mr); 113 114 int rxe_mem_init_fast(struct rxe_pd *pd, 115 int max_pages, struct rxe_mem *mem); 116 117 int rxe_mem_copy(struct rxe_mem *mem, u64 iova, void *addr, 118 int length, enum copy_direction dir, u32 *crcp); 119 120 int copy_data(struct rxe_pd *pd, int access, 121 struct rxe_dma_info *dma, void *addr, int length, 122 enum copy_direction dir, u32 *crcp); 123 124 void *iova_to_vaddr(struct rxe_mem *mem, u64 iova, int length); 125 126 enum lookup_type { 127 lookup_local, 128 lookup_remote, 129 }; 130 131 struct rxe_mem *lookup_mem(struct rxe_pd *pd, int access, u32 key, 132 enum lookup_type type); 133 134 int mem_check_range(struct rxe_mem *mem, u64 iova, size_t length); 135 136 int rxe_mem_map_pages(struct rxe_dev *rxe, struct rxe_mem *mem, 137 u64 *page, int num_pages, u64 iova); 138 139 void rxe_mem_cleanup(struct rxe_pool_entry *arg); 140 141 int advance_dma_data(struct rxe_dma_info *dma, unsigned int length); 142 143 /* rxe_net.c */ 144 void rxe_loopback(struct sk_buff *skb); 145 int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb); 146 struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av, 147 int paylen, struct rxe_pkt_info *pkt); 148 int rxe_prepare(struct rxe_pkt_info *pkt, struct sk_buff *skb, u32 *crc); 149 enum rdma_link_layer rxe_link_layer(struct rxe_dev *rxe, unsigned int port_num); 150 const char *rxe_parent_name(struct rxe_dev *rxe, unsigned int port_num); 151 struct device *rxe_dma_device(struct rxe_dev *rxe); 152 int rxe_mcast_add(struct rxe_dev *rxe, union ib_gid *mgid); 153 int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid); 154 155 /* rxe_qp.c */ 156 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init); 157 158 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 159 struct ib_qp_init_attr *init, 160 struct rxe_create_qp_resp __user *uresp, 161 struct ib_pd *ibpd, struct ib_udata *udata); 162 163 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init); 164 165 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 166 struct ib_qp_attr *attr, int mask); 167 168 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, 169 int mask, struct ib_udata *udata); 170 171 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask); 172 173 void rxe_qp_error(struct rxe_qp *qp); 174 175 void rxe_qp_destroy(struct rxe_qp *qp); 176 177 void rxe_qp_cleanup(struct rxe_pool_entry *arg); 178 179 static inline int qp_num(struct rxe_qp *qp) 180 { 181 return qp->ibqp.qp_num; 182 } 183 184 static inline enum ib_qp_type qp_type(struct rxe_qp *qp) 185 { 186 return qp->ibqp.qp_type; 187 } 188 189 static inline enum ib_qp_state qp_state(struct rxe_qp *qp) 190 { 191 return qp->attr.qp_state; 192 } 193 194 static inline int qp_mtu(struct rxe_qp *qp) 195 { 196 if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) 197 return qp->attr.path_mtu; 198 else 199 return IB_MTU_4096; 200 } 201 202 static inline int rcv_wqe_size(int max_sge) 203 { 204 return sizeof(struct rxe_recv_wqe) + 205 max_sge * sizeof(struct ib_sge); 206 } 207 208 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res); 209 210 static inline void rxe_advance_resp_resource(struct rxe_qp *qp) 211 { 212 qp->resp.res_head++; 213 if (unlikely(qp->resp.res_head == qp->attr.max_dest_rd_atomic)) 214 qp->resp.res_head = 0; 215 } 216 217 void retransmit_timer(struct timer_list *t); 218 void rnr_nak_timer(struct timer_list *t); 219 220 /* rxe_srq.c */ 221 #define IB_SRQ_INIT_MASK (~IB_SRQ_LIMIT) 222 223 int rxe_srq_chk_attr(struct rxe_dev *rxe, struct rxe_srq *srq, 224 struct ib_srq_attr *attr, enum ib_srq_attr_mask mask); 225 226 int rxe_srq_from_init(struct rxe_dev *rxe, struct rxe_srq *srq, 227 struct ib_srq_init_attr *init, 228 struct ib_ucontext *context, 229 struct rxe_create_srq_resp __user *uresp); 230 231 int rxe_srq_from_attr(struct rxe_dev *rxe, struct rxe_srq *srq, 232 struct ib_srq_attr *attr, enum ib_srq_attr_mask mask, 233 struct rxe_modify_srq_cmd *ucmd); 234 235 void rxe_dealloc(struct ib_device *ib_dev); 236 237 int rxe_completer(void *arg); 238 int rxe_requester(void *arg); 239 int rxe_responder(void *arg); 240 241 u32 rxe_icrc_hdr(struct rxe_pkt_info *pkt, struct sk_buff *skb); 242 243 void rxe_resp_queue_pkt(struct rxe_qp *qp, struct sk_buff *skb); 244 245 void rxe_comp_queue_pkt(struct rxe_qp *qp, struct sk_buff *skb); 246 247 static inline unsigned int wr_opcode_mask(int opcode, struct rxe_qp *qp) 248 { 249 return rxe_wr_opcode_info[opcode].mask[qp->ibqp.qp_type]; 250 } 251 252 static inline int rxe_xmit_packet(struct rxe_qp *qp, struct rxe_pkt_info *pkt, 253 struct sk_buff *skb) 254 { 255 int err; 256 int is_request = pkt->mask & RXE_REQ_MASK; 257 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 258 259 if ((is_request && (qp->req.state != QP_STATE_READY)) || 260 (!is_request && (qp->resp.state != QP_STATE_READY))) { 261 pr_info("Packet dropped. QP is not in ready state\n"); 262 goto drop; 263 } 264 265 if (pkt->mask & RXE_LOOPBACK_MASK) { 266 memcpy(SKB_TO_PKT(skb), pkt, sizeof(*pkt)); 267 rxe_loopback(skb); 268 err = 0; 269 } else { 270 err = rxe_send(pkt, skb); 271 } 272 273 if (err) { 274 rxe->xmit_errors++; 275 rxe_counter_inc(rxe, RXE_CNT_SEND_ERR); 276 return err; 277 } 278 279 if ((qp_type(qp) != IB_QPT_RC) && 280 (pkt->mask & RXE_END_MASK)) { 281 pkt->wqe->state = wqe_state_done; 282 rxe_run_task(&qp->comp.task, 1); 283 } 284 285 rxe_counter_inc(rxe, RXE_CNT_SENT_PKTS); 286 goto done; 287 288 drop: 289 kfree_skb(skb); 290 err = 0; 291 done: 292 return err; 293 } 294 295 #endif /* RXE_LOC_H */ 296