1 /*
2  * Copyright (c) 2017 Mellanox Technologies. 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 
34 #ifndef __MLX5_FPGA_CONN_H__
35 #define __MLX5_FPGA_CONN_H__
36 
37 #include <linux/mlx5/cq.h>
38 #include <linux/mlx5/qp.h>
39 
40 #include "fpga/core.h"
41 #include "fpga/sdk.h"
42 #include "wq.h"
43 
44 struct mlx5_fpga_conn {
45 	struct mlx5_fpga_device *fdev;
46 
47 	void (*recv_cb)(void *cb_arg, struct mlx5_fpga_dma_buf *buf);
48 	void *cb_arg;
49 
50 	/* FPGA QP */
51 	u32 fpga_qpc[MLX5_ST_SZ_DW(fpga_qpc)];
52 	u32 fpga_qpn;
53 
54 	/* CQ */
55 	struct {
56 		struct mlx5_cqwq wq;
57 		struct mlx5_wq_ctrl wq_ctrl;
58 		struct mlx5_core_cq mcq;
59 		struct tasklet_struct tasklet;
60 	} cq;
61 
62 	/* QP */
63 	struct {
64 		bool active;
65 		int sgid_index;
66 		struct mlx5_wq_qp wq;
67 		struct mlx5_wq_ctrl wq_ctrl;
68 		u32 qpn;
69 		struct {
70 			spinlock_t lock; /* Protects all SQ state */
71 			unsigned int pc;
72 			unsigned int cc;
73 			unsigned int size;
74 			struct mlx5_fpga_dma_buf **bufs;
75 			struct list_head backlog;
76 		} sq;
77 		struct {
78 			unsigned int pc;
79 			unsigned int cc;
80 			unsigned int size;
81 			struct mlx5_fpga_dma_buf **bufs;
82 		} rq;
83 	} qp;
84 };
85 
86 int mlx5_fpga_conn_device_init(struct mlx5_fpga_device *fdev);
87 void mlx5_fpga_conn_device_cleanup(struct mlx5_fpga_device *fdev);
88 struct mlx5_fpga_conn *
89 mlx5_fpga_conn_create(struct mlx5_fpga_device *fdev,
90 		      struct mlx5_fpga_conn_attr *attr,
91 		      enum mlx5_ifc_fpga_qp_type qp_type);
92 void mlx5_fpga_conn_destroy(struct mlx5_fpga_conn *conn);
93 int mlx5_fpga_conn_send(struct mlx5_fpga_conn *conn,
94 			struct mlx5_fpga_dma_buf *buf);
95 
96 #endif /* __MLX5_FPGA_CONN_H__ */
97