1 /*
2  * Copyright (c) 2013-2015, Mellanox Technologies, Ltd.  All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * OpenIB.org BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  */
32 
33 #include <linux/mlx5/driver.h>
34 #include "wq.h"
35 #include "mlx5_core.h"
36 
mlx5_wq_cyc_create(struct mlx5_core_dev * mdev,struct mlx5_wq_param * param,void * wqc,struct mlx5_wq_cyc * wq,struct mlx5_wq_ctrl * wq_ctrl)37 int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
38 		       void *wqc, struct mlx5_wq_cyc *wq,
39 		       struct mlx5_wq_ctrl *wq_ctrl)
40 {
41 	u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
42 	u8 log_wq_sz     = MLX5_GET(wq, wqc, log_wq_sz);
43 	struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
44 	int err;
45 
46 	err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
47 	if (err) {
48 		mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
49 		return err;
50 	}
51 
52 	wq->db  = wq_ctrl->db.db;
53 
54 	err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
55 				       &wq_ctrl->buf, param->buf_numa_node);
56 	if (err) {
57 		mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
58 		goto err_db_free;
59 	}
60 
61 	mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
62 	wq->sz = mlx5_wq_cyc_get_size(wq);
63 
64 	wq_ctrl->mdev = mdev;
65 
66 	return 0;
67 
68 err_db_free:
69 	mlx5_db_free(mdev, &wq_ctrl->db);
70 
71 	return err;
72 }
73 
mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc * wq,u16 ix,u8 nstrides)74 void mlx5_wq_cyc_wqe_dump(struct mlx5_wq_cyc *wq, u16 ix, u8 nstrides)
75 {
76 	size_t len;
77 	void *wqe;
78 
79 	if (!net_ratelimit())
80 		return;
81 
82 	nstrides = max_t(u8, nstrides, 1);
83 
84 	len = nstrides << wq->fbc.log_stride;
85 	wqe = mlx5_wq_cyc_get_wqe(wq, ix);
86 
87 	pr_info("WQE DUMP: WQ size %d WQ cur size %d, WQE index 0x%x, len: %zu\n",
88 		mlx5_wq_cyc_get_size(wq), wq->cur_sz, ix, len);
89 	print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET, 16, 1, wqe, len, false);
90 }
91 
mlx5_wq_cyc_reset(struct mlx5_wq_cyc * wq)92 void mlx5_wq_cyc_reset(struct mlx5_wq_cyc *wq)
93 {
94 	wq->wqe_ctr = 0;
95 	wq->cur_sz = 0;
96 	mlx5_wq_cyc_update_db_record(wq);
97 }
98 
mlx5_wq_qp_create(struct mlx5_core_dev * mdev,struct mlx5_wq_param * param,void * qpc,struct mlx5_wq_qp * wq,struct mlx5_wq_ctrl * wq_ctrl)99 int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
100 		      void *qpc, struct mlx5_wq_qp *wq,
101 		      struct mlx5_wq_ctrl *wq_ctrl)
102 {
103 	u8 log_rq_stride = MLX5_GET(qpc, qpc, log_rq_stride) + 4;
104 	u8 log_rq_sz     = MLX5_GET(qpc, qpc, log_rq_size);
105 	u8 log_sq_stride = ilog2(MLX5_SEND_WQE_BB);
106 	u8 log_sq_sz     = MLX5_GET(qpc, qpc, log_sq_size);
107 
108 	u32 rq_byte_size;
109 	int err;
110 
111 
112 
113 	err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
114 	if (err) {
115 		mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
116 		return err;
117 	}
118 
119 	err = mlx5_frag_buf_alloc_node(mdev,
120 				       wq_get_byte_sz(log_rq_sz, log_rq_stride) +
121 				       wq_get_byte_sz(log_sq_sz, log_sq_stride),
122 				       &wq_ctrl->buf, param->buf_numa_node);
123 	if (err) {
124 		mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
125 		goto err_db_free;
126 	}
127 
128 	mlx5_init_fbc(wq_ctrl->buf.frags, log_rq_stride, log_rq_sz, &wq->rq.fbc);
129 
130 	rq_byte_size = wq_get_byte_sz(log_rq_sz, log_rq_stride);
131 
132 	if (rq_byte_size < PAGE_SIZE) {
133 		/* SQ starts within the same page of the RQ */
134 		u16 sq_strides_offset = rq_byte_size / MLX5_SEND_WQE_BB;
135 
136 		mlx5_init_fbc_offset(wq_ctrl->buf.frags,
137 				     log_sq_stride, log_sq_sz, sq_strides_offset,
138 				     &wq->sq.fbc);
139 	} else {
140 		u16 rq_npages = rq_byte_size >> PAGE_SHIFT;
141 
142 		mlx5_init_fbc(wq_ctrl->buf.frags + rq_npages,
143 			      log_sq_stride, log_sq_sz, &wq->sq.fbc);
144 	}
145 
146 	wq->rq.db  = &wq_ctrl->db.db[MLX5_RCV_DBR];
147 	wq->sq.db  = &wq_ctrl->db.db[MLX5_SND_DBR];
148 
149 	wq_ctrl->mdev = mdev;
150 
151 	return 0;
152 
153 err_db_free:
154 	mlx5_db_free(mdev, &wq_ctrl->db);
155 
156 	return err;
157 }
158 
mlx5_cqwq_create(struct mlx5_core_dev * mdev,struct mlx5_wq_param * param,void * cqc,struct mlx5_cqwq * wq,struct mlx5_wq_ctrl * wq_ctrl)159 int mlx5_cqwq_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
160 		     void *cqc, struct mlx5_cqwq *wq,
161 		     struct mlx5_wq_ctrl *wq_ctrl)
162 {
163 	/* CQE_STRIDE_128 and CQE_STRIDE_128_PAD both mean 128B stride */
164 	u8 log_wq_stride = MLX5_GET(cqc, cqc, cqe_sz) == CQE_STRIDE_64 ? 6 : 7;
165 	u8 log_wq_sz     = MLX5_GET(cqc, cqc, log_cq_size);
166 	int err;
167 
168 	err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
169 	if (err) {
170 		mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
171 		return err;
172 	}
173 
174 	wq->db  = wq_ctrl->db.db;
175 
176 	err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
177 				       &wq_ctrl->buf,
178 				       param->buf_numa_node);
179 	if (err) {
180 		mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n",
181 			       err);
182 		goto err_db_free;
183 	}
184 
185 	mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, &wq->fbc);
186 
187 	wq_ctrl->mdev = mdev;
188 
189 	return 0;
190 
191 err_db_free:
192 	mlx5_db_free(mdev, &wq_ctrl->db);
193 
194 	return err;
195 }
196 
mlx5_wq_ll_init_list(struct mlx5_wq_ll * wq)197 static void mlx5_wq_ll_init_list(struct mlx5_wq_ll *wq)
198 {
199 	struct mlx5_wqe_srq_next_seg *next_seg;
200 	int i;
201 
202 	for (i = 0; i < wq->fbc.sz_m1; i++) {
203 		next_seg = mlx5_wq_ll_get_wqe(wq, i);
204 		next_seg->next_wqe_index = cpu_to_be16(i + 1);
205 	}
206 	next_seg = mlx5_wq_ll_get_wqe(wq, i);
207 	wq->tail_next = &next_seg->next_wqe_index;
208 }
209 
mlx5_wq_ll_create(struct mlx5_core_dev * mdev,struct mlx5_wq_param * param,void * wqc,struct mlx5_wq_ll * wq,struct mlx5_wq_ctrl * wq_ctrl)210 int mlx5_wq_ll_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
211 		      void *wqc, struct mlx5_wq_ll *wq,
212 		      struct mlx5_wq_ctrl *wq_ctrl)
213 {
214 	u8 log_wq_stride = MLX5_GET(wq, wqc, log_wq_stride);
215 	u8 log_wq_sz     = MLX5_GET(wq, wqc, log_wq_sz);
216 	struct mlx5_frag_buf_ctrl *fbc = &wq->fbc;
217 	int err;
218 
219 	err = mlx5_db_alloc_node(mdev, &wq_ctrl->db, param->db_numa_node);
220 	if (err) {
221 		mlx5_core_warn(mdev, "mlx5_db_alloc_node() failed, %d\n", err);
222 		return err;
223 	}
224 
225 	wq->db  = wq_ctrl->db.db;
226 
227 	err = mlx5_frag_buf_alloc_node(mdev, wq_get_byte_sz(log_wq_sz, log_wq_stride),
228 				       &wq_ctrl->buf, param->buf_numa_node);
229 	if (err) {
230 		mlx5_core_warn(mdev, "mlx5_frag_buf_alloc_node() failed, %d\n", err);
231 		goto err_db_free;
232 	}
233 
234 	mlx5_init_fbc(wq_ctrl->buf.frags, log_wq_stride, log_wq_sz, fbc);
235 
236 	mlx5_wq_ll_init_list(wq);
237 	wq_ctrl->mdev = mdev;
238 
239 	return 0;
240 
241 err_db_free:
242 	mlx5_db_free(mdev, &wq_ctrl->db);
243 
244 	return err;
245 }
246 
mlx5_wq_ll_reset(struct mlx5_wq_ll * wq)247 void mlx5_wq_ll_reset(struct mlx5_wq_ll *wq)
248 {
249 	wq->head = 0;
250 	wq->wqe_ctr = 0;
251 	wq->cur_sz = 0;
252 	mlx5_wq_ll_init_list(wq);
253 	mlx5_wq_ll_update_db_record(wq);
254 }
255 
mlx5_wq_destroy(struct mlx5_wq_ctrl * wq_ctrl)256 void mlx5_wq_destroy(struct mlx5_wq_ctrl *wq_ctrl)
257 {
258 	mlx5_frag_buf_free(wq_ctrl->mdev, &wq_ctrl->buf);
259 	mlx5_db_free(wq_ctrl->mdev, &wq_ctrl->db);
260 }
261 
262