1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Microsemi Ocelot Switch driver
*
* Copyright (c) 2019 Microsemi Corporation
*/
#include "ocelot_police.h"
enum mscc_qos_rate_mode {
MSCC_QOS_RATE_MODE_DISABLED, /* Policer/shaper disabled */
MSCC_QOS_RATE_MODE_LINE, /* Measure line rate in kbps incl. IPG */
MSCC_QOS_RATE_MODE_DATA, /* Measures data rate in kbps excl. IPG */
MSCC_QOS_RATE_MODE_FRAME, /* Measures frame rate in fps */
__MSCC_QOS_RATE_MODE_END,
NUM_MSCC_QOS_RATE_MODE = __MSCC_QOS_RATE_MODE_END,
MSCC_QOS_RATE_MODE_MAX = __MSCC_QOS_RATE_MODE_END - 1,
};
/* Types for ANA:POL[0-192]:POL_MODE_CFG.FRM_MODE */
#define POL_MODE_LINERATE 0 /* Incl IPG. Unit: 33 1/3 kbps, 4096 bytes */
#define POL_MODE_DATARATE 1 /* Excl IPG. Unit: 33 1/3 kbps, 4096 bytes */
#define POL_MODE_FRMRATE_HI 2 /* Unit: 33 1/3 fps, 32.8 frames */
#define POL_MODE_FRMRATE_LO 3 /* Unit: 1/3 fps, 0.3 frames */
/* Policer indexes */
#define POL_IX_PORT 0 /* 0-11 : Port policers */
#define POL_IX_QUEUE 32 /* 32-127 : Queue policers */
/* Default policer order */
#define POL_ORDER 0x1d3 /* Ocelot policer order: Serial (QoS -> Port -> VCAP) */
struct qos_policer_conf {
enum mscc_qos_rate_mode mode;
bool dlb; /* Enable DLB (dual leaky bucket mode */
bool cf; /* Coupling flag (ignored in SLB mode) */
u32 cir; /* CIR in kbps/fps (ignored in SLB mode) */
u32 cbs; /* CBS in bytes/frames (ignored in SLB mode) */
u32 pir; /* PIR in kbps/fps */
u32 pbs; /* PBS in bytes/frames */
u8 ipg; /* Size of IPG when MSCC_QOS_RATE_MODE_LINE is chosen */
};
static int qos_policer_conf_set(struct ocelot_port *port, u32 pol_ix,
struct qos_policer_conf *conf)
{
u32 cf = 0, cir_ena = 0, frm_mode = POL_MODE_LINERATE;
u32 cir = 0, cbs = 0, pir = 0, pbs = 0;
bool cir_discard = 0, pir_discard = 0;
struct ocelot *ocelot = port->ocelot;
u32 pbs_max = 0, cbs_max = 0;
u8 ipg = 20;
u32 value;
pir = conf->pir;
pbs = conf->pbs;
switch (conf->mode) {
case MSCC_QOS_RATE_MODE_LINE:
case MSCC_QOS_RATE_MODE_DATA:
if (conf->mode == MSCC_QOS_RATE_MODE_LINE) {
frm_mode = POL_MODE_LINERATE;
ipg = min_t(u8, GENMASK(4, 0), conf->ipg);
} else {
frm_mode = POL_MODE_DATARATE;
}
if (conf->dlb) {
cir_ena = 1;
cir = conf->cir;
cbs = conf->cbs;
if (cir == 0 && cbs == 0) {
/* Discard cir frames */
cir_discard = 1;
} else {
cir = DIV_ROUND_UP(cir, 100);
cir *= 3; /* 33 1/3 kbps */
cbs = DIV_ROUND_UP(cbs, 4096);
cbs = (cbs ? cbs : 1); /* No zero burst size */
cbs_max = 60; /* Limit burst size */
cf = conf->cf;
if (cf)
pir += conf->cir;
}
}
if (pir == 0 && pbs == 0) {
/* Discard PIR frames */
pir_discard = 1;
} else {
pir = DIV_ROUND_UP(pir, 100);
pir *= 3; /* 33 1/3 kbps */
pbs = DIV_ROUND_UP(pbs, 4096);
pbs = (pbs ? pbs : 1); /* No zero burst size */
pbs_max = 60; /* Limit burst size */
}
break;
case MSCC_QOS_RATE_MODE_FRAME:
if (pir >= 100) {
frm_mode = POL_MODE_FRMRATE_HI;
pir = DIV_ROUND_UP(pir, 100);
pir *= 3; /* 33 1/3 fps */
pbs = (pbs * 10) / 328; /* 32.8 frames */
pbs = (pbs ? pbs : 1); /* No zero burst size */
pbs_max = GENMASK(6, 0); /* Limit burst size */
} else {
frm_mode = POL_MODE_FRMRATE_LO;
if (pir == 0 && pbs == 0) {
/* Discard all frames */
pir_discard = 1;
cir_discard = 1;
} else {
pir *= 3; /* 1/3 fps */
pbs = (pbs * 10) / 3; /* 0.3 frames */
pbs = (pbs ? pbs : 1); /* No zero burst size */
pbs_max = 61; /* Limit burst size */
}
}
break;
default: /* MSCC_QOS_RATE_MODE_DISABLED */
/* Disable policer using maximum rate and zero burst */
pir = GENMASK(15, 0);
pbs = 0;
break;
}
/* Check limits */
if (pir > GENMASK(15, 0)) {
netdev_err(port->dev, "Invalid pir\n");
return -EINVAL;
}
if (cir > GENMASK(15, 0)) {
netdev_err(port->dev, "Invalid cir\n");
return -EINVAL;
}
if (pbs > pbs_max) {
netdev_err(port->dev, "Invalid pbs\n");
return -EINVAL;
}
if (cbs > cbs_max) {
netdev_err(port->dev, "Invalid cbs\n");
return -EINVAL;
}
value = (ANA_POL_MODE_CFG_IPG_SIZE(ipg) |
ANA_POL_MODE_CFG_FRM_MODE(frm_mode) |
(cf ? ANA_POL_MODE_CFG_DLB_COUPLED : 0) |
(cir_ena ? ANA_POL_MODE_CFG_CIR_ENA : 0) |
ANA_POL_MODE_CFG_OVERSHOOT_ENA);
ocelot_write_gix(ocelot, value, ANA_POL_MODE_CFG, pol_ix);
ocelot_write_gix(ocelot,
ANA_POL_PIR_CFG_PIR_RATE(pir) |
ANA_POL_PIR_CFG_PIR_BURST(pbs),
ANA_POL_PIR_CFG, pol_ix);
ocelot_write_gix(ocelot,
(pir_discard ? GENMASK(22, 0) : 0),
ANA_POL_PIR_STATE, pol_ix);
ocelot_write_gix(ocelot,
ANA_POL_CIR_CFG_CIR_RATE(cir) |
ANA_POL_CIR_CFG_CIR_BURST(cbs),
ANA_POL_CIR_CFG, pol_ix);
ocelot_write_gix(ocelot,
(cir_discard ? GENMASK(22, 0) : 0),
ANA_POL_CIR_STATE, pol_ix);
return 0;
}
int ocelot_port_policer_add(struct ocelot_port *port,
struct ocelot_policer *pol)
{
struct ocelot *ocelot = port->ocelot;
struct qos_policer_conf pp = { 0 };
int err;
if (!pol)
return -EINVAL;
pp.mode = MSCC_QOS_RATE_MODE_DATA;
pp.pir = pol->rate;
pp.pbs = pol->burst;
netdev_dbg(port->dev,
"%s: port %u pir %u kbps, pbs %u bytes\n",
__func__, port->chip_port, pp.pir, pp.pbs);
err = qos_policer_conf_set(port, POL_IX_PORT + port->chip_port, &pp);
if (err)
return err;
ocelot_rmw_gix(ocelot,
ANA_PORT_POL_CFG_PORT_POL_ENA |
ANA_PORT_POL_CFG_POL_ORDER(POL_ORDER),
ANA_PORT_POL_CFG_PORT_POL_ENA |
ANA_PORT_POL_CFG_POL_ORDER_M,
ANA_PORT_POL_CFG, port->chip_port);
return 0;
}
int ocelot_port_policer_del(struct ocelot_port *port)
{
struct ocelot *ocelot = port->ocelot;
struct qos_policer_conf pp = { 0 };
int err;
netdev_dbg(port->dev, "%s: port %u\n", __func__, port->chip_port);
pp.mode = MSCC_QOS_RATE_MODE_DISABLED;
err = qos_policer_conf_set(port, POL_IX_PORT + port->chip_port, &pp);
if (err)
return err;
ocelot_rmw_gix(ocelot,
ANA_PORT_POL_CFG_POL_ORDER(POL_ORDER),
ANA_PORT_POL_CFG_PORT_POL_ENA |
ANA_PORT_POL_CFG_POL_ORDER_M,
ANA_PORT_POL_CFG, port->chip_port);
return 0;
}
|
