1 /*
2  * Broadcom NetXtreme-E RoCE driver.
3  *
4  * Copyright (c) 2016 - 2017, Broadcom. All rights reserved.  The term
5  * Broadcom refers to Broadcom Limited and/or its subsidiaries.
6  *
7  * This software is available to you under a choice of one of two
8  * licenses.  You may choose to be licensed under the terms of the GNU
9  * General Public License (GPL) Version 2, available from the file
10  * COPYING in the main directory of this source tree, or the
11  * BSD license below:
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  *
17  * 1. Redistributions of source code must retain the above copyright
18  *    notice, this list of conditions and the following disclaimer.
19  * 2. Redistributions in binary form must reproduce the above copyright
20  *    notice, this list of conditions and the following disclaimer in
21  *    the documentation and/or other materials provided with the
22  *    distribution.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
26  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
31  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
32  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
33  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
34  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35  *
36  * Description: IB Verbs interpreter (header)
37  */
38 
39 #ifndef __BNXT_RE_IB_VERBS_H__
40 #define __BNXT_RE_IB_VERBS_H__
41 
42 struct bnxt_re_gid_ctx {
43 	u32			idx;
44 	u32			refcnt;
45 };
46 
47 #define BNXT_RE_FENCE_BYTES	64
48 struct bnxt_re_fence_data {
49 	u32 size;
50 	u8 va[BNXT_RE_FENCE_BYTES];
51 	dma_addr_t dma_addr;
52 	struct bnxt_re_mr *mr;
53 	struct ib_mw *mw;
54 	struct bnxt_qplib_swqe bind_wqe;
55 	u32 bind_rkey;
56 };
57 
58 struct bnxt_re_pd {
59 	struct ib_pd            ib_pd;
60 	struct bnxt_re_dev	*rdev;
61 	struct bnxt_qplib_pd	qplib_pd;
62 	struct bnxt_re_fence_data fence;
63 	struct rdma_user_mmap_entry *pd_db_mmap;
64 	struct rdma_user_mmap_entry *pd_wcdb_mmap;
65 };
66 
67 struct bnxt_re_ah {
68 	struct ib_ah		ib_ah;
69 	struct bnxt_re_dev	*rdev;
70 	struct bnxt_qplib_ah	qplib_ah;
71 };
72 
73 struct bnxt_re_srq {
74 	struct ib_srq		ib_srq;
75 	struct bnxt_re_dev	*rdev;
76 	u32			srq_limit;
77 	struct bnxt_qplib_srq	qplib_srq;
78 	struct ib_umem		*umem;
79 	spinlock_t		lock;		/* protect srq */
80 };
81 
82 struct bnxt_re_qp {
83 	struct ib_qp		ib_qp;
84 	struct list_head	list;
85 	struct bnxt_re_dev	*rdev;
86 	spinlock_t		sq_lock;	/* protect sq */
87 	spinlock_t		rq_lock;	/* protect rq */
88 	struct bnxt_qplib_qp	qplib_qp;
89 	struct ib_umem		*sumem;
90 	struct ib_umem		*rumem;
91 	/* QP1 */
92 	u32			send_psn;
93 	struct ib_ud_header	qp1_hdr;
94 	struct bnxt_re_cq	*scq;
95 	struct bnxt_re_cq	*rcq;
96 };
97 
98 struct bnxt_re_cq {
99 	struct ib_cq		ib_cq;
100 	struct bnxt_re_dev	*rdev;
101 	spinlock_t              cq_lock;	/* protect cq */
102 	u16			cq_count;
103 	u16			cq_period;
104 	struct bnxt_qplib_cq	qplib_cq;
105 	struct bnxt_qplib_cqe	*cql;
106 #define MAX_CQL_PER_POLL	1024
107 	u32			max_cql;
108 	struct ib_umem		*umem;
109 	struct ib_umem		*resize_umem;
110 	int			resize_cqe;
111 };
112 
113 struct bnxt_re_mr {
114 	struct bnxt_re_dev	*rdev;
115 	struct ib_mr		ib_mr;
116 	struct ib_umem		*ib_umem;
117 	struct bnxt_qplib_mrw	qplib_mr;
118 	u32			npages;
119 	u64			*pages;
120 	struct bnxt_qplib_frpl	qplib_frpl;
121 };
122 
123 struct bnxt_re_frpl {
124 	struct bnxt_re_dev		*rdev;
125 	struct bnxt_qplib_frpl		qplib_frpl;
126 	u64				*page_list;
127 };
128 
129 struct bnxt_re_mw {
130 	struct bnxt_re_dev	*rdev;
131 	struct ib_mw		ib_mw;
132 	struct bnxt_qplib_mrw	qplib_mw;
133 };
134 
135 struct bnxt_re_ucontext {
136 	struct ib_ucontext      ib_uctx;
137 	struct bnxt_re_dev	*rdev;
138 	struct bnxt_qplib_dpi	dpi;
139 	struct bnxt_qplib_dpi   wcdpi;
140 	void			*shpg;
141 	spinlock_t		sh_lock;	/* protect shpg */
142 	struct rdma_user_mmap_entry *shpage_mmap;
143 };
144 
145 enum bnxt_re_mmap_flag {
146 	BNXT_RE_MMAP_SH_PAGE,
147 	BNXT_RE_MMAP_UC_DB,
148 	BNXT_RE_MMAP_WC_DB,
149 	BNXT_RE_MMAP_DBR_PAGE,
150 	BNXT_RE_MMAP_DBR_BAR,
151 };
152 
153 struct bnxt_re_user_mmap_entry {
154 	struct rdma_user_mmap_entry rdma_entry;
155 	struct bnxt_re_ucontext *uctx;
156 	u64 mem_offset;
157 	u8 mmap_flag;
158 };
159 
160 static inline u16 bnxt_re_get_swqe_size(int nsge)
161 {
162 	return sizeof(struct sq_send_hdr) + nsge * sizeof(struct sq_sge);
163 }
164 
165 static inline u16 bnxt_re_get_rwqe_size(int nsge)
166 {
167 	return sizeof(struct rq_wqe_hdr) + (nsge * sizeof(struct sq_sge));
168 }
169 
170 int bnxt_re_query_device(struct ib_device *ibdev,
171 			 struct ib_device_attr *ib_attr,
172 			 struct ib_udata *udata);
173 int bnxt_re_query_port(struct ib_device *ibdev, u32 port_num,
174 		       struct ib_port_attr *port_attr);
175 int bnxt_re_get_port_immutable(struct ib_device *ibdev, u32 port_num,
176 			       struct ib_port_immutable *immutable);
177 void bnxt_re_query_fw_str(struct ib_device *ibdev, char *str);
178 int bnxt_re_query_pkey(struct ib_device *ibdev, u32 port_num,
179 		       u16 index, u16 *pkey);
180 int bnxt_re_del_gid(const struct ib_gid_attr *attr, void **context);
181 int bnxt_re_add_gid(const struct ib_gid_attr *attr, void **context);
182 int bnxt_re_query_gid(struct ib_device *ibdev, u32 port_num,
183 		      int index, union ib_gid *gid);
184 enum rdma_link_layer bnxt_re_get_link_layer(struct ib_device *ibdev,
185 					    u32 port_num);
186 int bnxt_re_alloc_pd(struct ib_pd *pd, struct ib_udata *udata);
187 int bnxt_re_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata);
188 int bnxt_re_create_ah(struct ib_ah *ah, struct rdma_ah_init_attr *init_attr,
189 		      struct ib_udata *udata);
190 int bnxt_re_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);
191 int bnxt_re_destroy_ah(struct ib_ah *ah, u32 flags);
192 int bnxt_re_create_srq(struct ib_srq *srq,
193 		       struct ib_srq_init_attr *srq_init_attr,
194 		       struct ib_udata *udata);
195 int bnxt_re_modify_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr,
196 		       enum ib_srq_attr_mask srq_attr_mask,
197 		       struct ib_udata *udata);
198 int bnxt_re_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr);
199 int bnxt_re_destroy_srq(struct ib_srq *srq, struct ib_udata *udata);
200 int bnxt_re_post_srq_recv(struct ib_srq *srq, const struct ib_recv_wr *recv_wr,
201 			  const struct ib_recv_wr **bad_recv_wr);
202 int bnxt_re_create_qp(struct ib_qp *qp, struct ib_qp_init_attr *qp_init_attr,
203 		      struct ib_udata *udata);
204 int bnxt_re_modify_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
205 		      int qp_attr_mask, struct ib_udata *udata);
206 int bnxt_re_query_qp(struct ib_qp *qp, struct ib_qp_attr *qp_attr,
207 		     int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr);
208 int bnxt_re_destroy_qp(struct ib_qp *qp, struct ib_udata *udata);
209 int bnxt_re_post_send(struct ib_qp *qp, const struct ib_send_wr *send_wr,
210 		      const struct ib_send_wr **bad_send_wr);
211 int bnxt_re_post_recv(struct ib_qp *qp, const struct ib_recv_wr *recv_wr,
212 		      const struct ib_recv_wr **bad_recv_wr);
213 int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
214 		      struct ib_udata *udata);
215 int bnxt_re_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
216 int bnxt_re_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
217 int bnxt_re_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
218 int bnxt_re_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
219 struct ib_mr *bnxt_re_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
220 
221 int bnxt_re_map_mr_sg(struct ib_mr *ib_mr, struct scatterlist *sg, int sg_nents,
222 		      unsigned int *sg_offset);
223 struct ib_mr *bnxt_re_alloc_mr(struct ib_pd *ib_pd, enum ib_mr_type mr_type,
224 			       u32 max_num_sg);
225 int bnxt_re_dereg_mr(struct ib_mr *mr, struct ib_udata *udata);
226 struct ib_mw *bnxt_re_alloc_mw(struct ib_pd *ib_pd, enum ib_mw_type type,
227 			       struct ib_udata *udata);
228 int bnxt_re_dealloc_mw(struct ib_mw *mw);
229 struct ib_mr *bnxt_re_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
230 				  u64 virt_addr, int mr_access_flags,
231 				  struct ib_udata *udata);
232 struct ib_mr *bnxt_re_reg_user_mr_dmabuf(struct ib_pd *ib_pd, u64 start,
233 					 u64 length, u64 virt_addr,
234 					 int fd, int mr_access_flags,
235 					 struct ib_udata *udata);
236 int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata);
237 void bnxt_re_dealloc_ucontext(struct ib_ucontext *context);
238 int bnxt_re_mmap(struct ib_ucontext *context, struct vm_area_struct *vma);
239 void bnxt_re_mmap_free(struct rdma_user_mmap_entry *rdma_entry);
240 
241 
242 unsigned long bnxt_re_lock_cqs(struct bnxt_re_qp *qp);
243 void bnxt_re_unlock_cqs(struct bnxt_re_qp *qp, unsigned long flags);
244 #endif /* __BNXT_RE_IB_VERBS_H__ */
245