1 /*
2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies.
4  * All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34 
35 #ifndef MLX4_FW_QOS_H
36 #define MLX4_FW_QOS_H
37 
38 #include <linux/mlx4/cmd.h>
39 #include <linux/mlx4/device.h>
40 
41 #define MLX4_NUM_UP 8
42 #define MLX4_NUM_TC 8
43 
44 /* Default supported priorities for VPP allocation */
45 #define MLX4_DEFAULT_QOS_PRIO (0)
46 
47 /* Derived from FW feature definition, 0 is the default vport fo all QPs */
48 #define MLX4_VPP_DEFAULT_VPORT (0)
49 
50 struct mlx4_vport_qos_param {
51 	u32 bw_share;
52 	u32 max_avg_bw;
53 	u8 enable;
54 };
55 
56 /**
57  * mlx4_SET_PORT_PRIO2TC - This routine maps user priorities to traffic
58  * classes of a given port and device.
59  *
60  * @dev: mlx4_dev.
61  * @port: Physical port number.
62  * @prio2tc: Array of TC associated with each priorities.
63  *
64  * Returns 0 on success or a negative mlx4_core errno code.
65  **/
66 int mlx4_SET_PORT_PRIO2TC(struct mlx4_dev *dev, u8 port, u8 *prio2tc);
67 
68 /**
69  * mlx4_SET_PORT_SCHEDULER - This routine configures the arbitration between
70  * traffic classes (ETS) and configured rate limit for traffic classes.
71  * tc_tx_bw, pg and ratelimit are arrays where each index represents a TC.
72  * The description for those parameters below refers to a single TC.
73  *
74  * @dev: mlx4_dev.
75  * @port: Physical port number.
76  * @tc_tx_bw: The percentage of the bandwidth allocated for traffic class
77  *  within a TC group. The sum of the bw_percentage of all the traffic
78  *  classes within a TC group must equal 100% for correct operation.
79  * @pg: The TC group the traffic class is associated with.
80  * @ratelimit: The maximal bandwidth allowed for the use by this traffic class.
81  *
82  * Returns 0 on success or a negative mlx4_core errno code.
83  **/
84 int mlx4_SET_PORT_SCHEDULER(struct mlx4_dev *dev, u8 port, u8 *tc_tx_bw,
85 			    u8 *pg, u16 *ratelimit);
86 /**
87  * mlx4_ALLOCATE_VPP_get - Query port VPP available resources and allocation.
88  * Before distribution of VPPs to priorities, only available_vpp is returned.
89  * After initialization it returns the distribution of VPPs among priorities.
90  *
91  * @dev: mlx4_dev.
92  * @port: Physical port number.
93  * @available_vpp: Pointer to variable where number of available VPPs is stored
94  * @vpp_p_up: Distribution of VPPs to priorities is stored in this array
95  *
96  * Returns 0 on success or a negative mlx4_core errno code.
97  **/
98 int mlx4_ALLOCATE_VPP_get(struct mlx4_dev *dev, u8 port,
99 			  u16 *available_vpp, u8 *vpp_p_up);
100 /**
101  * mlx4_ALLOCATE_VPP_set - Distribution of VPPs among differnt priorities.
102  * The total number of VPPs assigned to all for a port must not exceed
103  * the value reported by available_vpp in mlx4_ALLOCATE_VPP_get.
104  * VPP allocation is allowed only after the port type has been set,
105  * and while no QPs are open for this port.
106  *
107  * @dev: mlx4_dev.
108  * @port: Physical port number.
109  * @vpp_p_up: Allocation of VPPs to different priorities.
110  *
111  * Returns 0 on success or a negative mlx4_core errno code.
112  **/
113 int mlx4_ALLOCATE_VPP_set(struct mlx4_dev *dev, u8 port, u8 *vpp_p_up);
114 
115 /**
116  * mlx4_SET_VPORT_QOS_get - Query QoS proporties of a Vport.
117  * Each priority allowed for the Vport is assigned with a share of the BW,
118  * and a BW limitation. This commands query the current QoS values.
119  *
120  * @dev: mlx4_dev.
121  * @port: Physical port number.
122  * @vport: Vport id.
123  * @out_param: Array of mlx4_vport_qos_param that will contain the values.
124  *
125  * Returns 0 on success or a negative mlx4_core errno code.
126  **/
127 int mlx4_SET_VPORT_QOS_get(struct mlx4_dev *dev, u8 port, u8 vport,
128 			   struct mlx4_vport_qos_param *out_param);
129 
130 /**
131  * mlx4_SET_VPORT_QOS_set - Set QoS proporties of a Vport.
132  * QoS parameters can be modified at any time, but must be initialized
133  * before any QP is associated with the VPort.
134  *
135  * @dev: mlx4_dev.
136  * @port: Physical port number.
137  * @vport: Vport id.
138  * @out_param: Array of mlx4_vport_qos_param which holds the requested values.
139  *
140  * Returns 0 on success or a negative mlx4_core errno code.
141  **/
142 int mlx4_SET_VPORT_QOS_set(struct mlx4_dev *dev, u8 port, u8 vport,
143 			   struct mlx4_vport_qos_param *in_param);
144 
145 #endif /* MLX4_FW_QOS_H */
146