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