1 /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
2 /*
3  * Copyright (C) 2018 Netronome Systems, Inc.
4  *
5  * This software is dual licensed under the GNU General License Version 2,
6  * June 1991 as shown in the file COPYING in the top-level directory of this
7  * source tree or the BSD 2-Clause License provided below.  You have the
8  * option to license this software under the complete terms of either license.
9  *
10  * The BSD 2-Clause License:
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  *      1. Redistributions of source code must retain the above
17  *         copyright notice, this list of conditions and the following
18  *         disclaimer.
19  *
20  *      2. 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 __NFP_ABM_H__
36 #define __NFP_ABM_H__ 1
37 
38 #include <net/devlink.h>
39 
40 struct nfp_app;
41 struct nfp_net;
42 
43 #define NFP_ABM_PORTID_TYPE	GENMASK(23, 16)
44 #define NFP_ABM_PORTID_ID	GENMASK(7, 0)
45 
46 /**
47  * struct nfp_abm - ABM NIC app structure
48  * @app:	back pointer to nfp_app
49  * @pf_id:	ID of our PF link
50  * @eswitch_mode:	devlink eswitch mode, advanced functions only visible
51  *			in switchdev mode
52  * @q_lvls:	queue level control area
53  * @qm_stats:	queue statistics symbol
54  */
55 struct nfp_abm {
56 	struct nfp_app *app;
57 	unsigned int pf_id;
58 	enum devlink_eswitch_mode eswitch_mode;
59 	const struct nfp_rtsym *q_lvls;
60 	const struct nfp_rtsym *qm_stats;
61 };
62 
63 /**
64  * struct nfp_alink_stats - ABM NIC statistics
65  * @tx_pkts:		number of TXed packets
66  * @tx_bytes:		number of TXed bytes
67  * @backlog_pkts:	momentary backlog length (packets)
68  * @backlog_bytes:	momentary backlog length (bytes)
69  * @overlimits:		number of ECN marked TXed packets (accumulative)
70  * @drops:		number of tail-dropped packets (accumulative)
71  */
72 struct nfp_alink_stats {
73 	u64 tx_pkts;
74 	u64 tx_bytes;
75 	u64 backlog_pkts;
76 	u64 backlog_bytes;
77 	u64 overlimits;
78 	u64 drops;
79 };
80 
81 /**
82  * struct nfp_alink_xstats - extended ABM NIC statistics
83  * @ecn_marked:		number of ECN marked TXed packets
84  * @pdrop:		number of hard drops due to queue limit
85  */
86 struct nfp_alink_xstats {
87 	u64 ecn_marked;
88 	u64 pdrop;
89 };
90 
91 /**
92  * struct nfp_red_qdisc - representation of single RED Qdisc
93  * @handle:	handle of currently offloaded RED Qdisc
94  * @stats:	statistics from last refresh
95  * @xstats:	base of extended statistics
96  */
97 struct nfp_red_qdisc {
98 	u32 handle;
99 	struct nfp_alink_stats stats;
100 	struct nfp_alink_xstats xstats;
101 };
102 
103 /**
104  * struct nfp_abm_link - port tuple of a ABM NIC
105  * @abm:	back pointer to nfp_abm
106  * @vnic:	data vNIC
107  * @id:		id of the data vNIC
108  * @queue_base:	id of base to host queue within PCIe (not QC idx)
109  * @total_queues:	number of PF queues
110  * @parent:	handle of expected parent, i.e. handle of MQ, or TC_H_ROOT
111  * @num_qdiscs:	number of currently used qdiscs
112  * @qdiscs:	array of qdiscs
113  */
114 struct nfp_abm_link {
115 	struct nfp_abm *abm;
116 	struct nfp_net *vnic;
117 	unsigned int id;
118 	unsigned int queue_base;
119 	unsigned int total_queues;
120 	u32 parent;
121 	unsigned int num_qdiscs;
122 	struct nfp_red_qdisc *qdiscs;
123 };
124 
125 void nfp_abm_ctrl_read_params(struct nfp_abm_link *alink);
126 int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm);
127 int nfp_abm_ctrl_set_all_q_lvls(struct nfp_abm_link *alink, u32 val);
128 int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int i,
129 			   u32 val);
130 int nfp_abm_ctrl_read_stats(struct nfp_abm_link *alink,
131 			    struct nfp_alink_stats *stats);
132 int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, unsigned int i,
133 			      struct nfp_alink_stats *stats);
134 int nfp_abm_ctrl_read_xstats(struct nfp_abm_link *alink,
135 			     struct nfp_alink_xstats *xstats);
136 int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink, unsigned int i,
137 			       struct nfp_alink_xstats *xstats);
138 u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int i);
139 u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int i);
140 int nfp_abm_ctrl_qm_enable(struct nfp_abm *abm);
141 int nfp_abm_ctrl_qm_disable(struct nfp_abm *abm);
142 #endif
143