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
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
* Copyright (C) 2018-2021 Linaro Ltd.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include "ipa.h"
#include "ipa_data.h"
#include "ipa_reg.h"
#include "ipa_resource.h"
/**
* DOC: IPA Resources
*
* The IPA manages a set of resources internally for various purposes.
* A given IPA version has a fixed number of resource types, and a fixed
* total number of resources of each type. "Source" resource types
* are separate from "destination" resource types.
*
* Each version of IPA also has some number of resource groups. Each
* endpoint is assigned to a resource group, and all endpoints in the
* same group share pools of each type of resource. A subset of the
* total resources of each type is assigned for use by each group.
*/
/* # IPA source resource groups available based on version */
static u32 ipa_resource_group_src_count(enum ipa_version version)
{
switch (version) {
case IPA_VERSION_3_5_1:
case IPA_VERSION_4_0:
case IPA_VERSION_4_1:
return 4;
case IPA_VERSION_4_2:
return 1;
case IPA_VERSION_4_5:
return 5;
default:
return 0;
}
}
/* # IPA destination resource groups available based on version */
static u32 ipa_resource_group_dst_count(enum ipa_version version)
{
switch (version) {
case IPA_VERSION_3_5_1:
return 3;
case IPA_VERSION_4_0:
case IPA_VERSION_4_1:
return 4;
case IPA_VERSION_4_2:
return 1;
case IPA_VERSION_4_5:
return 5;
default:
return 0;
}
}
static bool ipa_resource_limits_valid(struct ipa *ipa,
const struct ipa_resource_data *data)
{
#ifdef IPA_VALIDATION
u32 group_count;
u32 i;
u32 j;
/* We program at most 6 source or destination resource group limits */
BUILD_BUG_ON(IPA_RESOURCE_GROUP_SRC_MAX > 6);
group_count = ipa_resource_group_src_count(ipa->version);
if (!group_count || group_count > IPA_RESOURCE_GROUP_SRC_MAX)
return false;
/* Return an error if a non-zero resource limit is specified
* for a resource group not supported by hardware.
*/
for (i = 0; i < data->resource_src_count; i++) {
const struct ipa_resource_src *resource;
resource = &data->resource_src[i];
for (j = group_count; j < IPA_RESOURCE_GROUP_SRC_MAX; j++)
if (resource->limits[j].min || resource->limits[j].max)
return false;
}
group_count = ipa_resource_group_dst_count(ipa->version);
if (!group_count || group_count > IPA_RESOURCE_GROUP_DST_MAX)
return false;
for (i = 0; i < data->resource_dst_count; i++) {
const struct ipa_resource_dst *resource;
resource = &data->resource_dst[i];
for (j = group_count; j < IPA_RESOURCE_GROUP_DST_MAX; j++)
if (resource->limits[j].min || resource->limits[j].max)
return false;
}
#endif /* !IPA_VALIDATION */
return true;
}
static void
ipa_resource_config_common(struct ipa *ipa, u32 offset,
const struct ipa_resource_limits *xlimits,
const struct ipa_resource_limits *ylimits)
{
u32 val;
val = u32_encode_bits(xlimits->min, X_MIN_LIM_FMASK);
val |= u32_encode_bits(xlimits->max, X_MAX_LIM_FMASK);
if (ylimits) {
val |= u32_encode_bits(ylimits->min, Y_MIN_LIM_FMASK);
val |= u32_encode_bits(ylimits->max, Y_MAX_LIM_FMASK);
}
iowrite32(val, ipa->reg_virt + offset);
}
static void ipa_resource_config_src(struct ipa *ipa,
const struct ipa_resource_src *resource)
{
u32 group_count = ipa_resource_group_src_count(ipa->version);
const struct ipa_resource_limits *ylimits;
u32 offset;
offset = IPA_REG_SRC_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(resource->type);
ylimits = group_count == 1 ? NULL : &resource->limits[1];
ipa_resource_config_common(ipa, offset, &resource->limits[0], ylimits);
if (group_count < 3)
return;
offset = IPA_REG_SRC_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(resource->type);
ylimits = group_count == 3 ? NULL : &resource->limits[3];
ipa_resource_config_common(ipa, offset, &resource->limits[2], ylimits);
if (group_count < 5)
return;
offset = IPA_REG_SRC_RSRC_GRP_45_RSRC_TYPE_N_OFFSET(resource->type);
ylimits = group_count == 5 ? NULL : &resource->limits[5];
ipa_resource_config_common(ipa, offset, &resource->limits[4], ylimits);
}
static void ipa_resource_config_dst(struct ipa *ipa,
const struct ipa_resource_dst *resource)
{
u32 group_count = ipa_resource_group_dst_count(ipa->version);
const struct ipa_resource_limits *ylimits;
u32 offset;
offset = IPA_REG_DST_RSRC_GRP_01_RSRC_TYPE_N_OFFSET(resource->type);
ylimits = group_count == 1 ? NULL : &resource->limits[1];
ipa_resource_config_common(ipa, offset, &resource->limits[0], ylimits);
if (group_count < 3)
return;
offset = IPA_REG_DST_RSRC_GRP_23_RSRC_TYPE_N_OFFSET(resource->type);
ylimits = group_count == 3 ? NULL : &resource->limits[3];
ipa_resource_config_common(ipa, offset, &resource->limits[2], ylimits);
if (group_count < 5)
return;
offset = IPA_REG_DST_RSRC_GRP_45_RSRC_TYPE_N_OFFSET(resource->type);
ylimits = group_count == 5 ? NULL : &resource->limits[5];
ipa_resource_config_common(ipa, offset, &resource->limits[4], ylimits);
}
/* Configure resources */
int ipa_resource_config(struct ipa *ipa, const struct ipa_resource_data *data)
{
u32 i;
if (!ipa_resource_limits_valid(ipa, data))
return -EINVAL;
for (i = 0; i < data->resource_src_count; i++)
ipa_resource_config_src(ipa, &data->resource_src[i]);
for (i = 0; i < data->resource_dst_count; i++)
ipa_resource_config_dst(ipa, &data->resource_dst[i]);
return 0;
}
/* Inverse of ipa_resource_config() */
void ipa_resource_deconfig(struct ipa *ipa)
{
/* Nothing to do */
}
|
