1 // SPDX-License-Identifier: GPL-2.0
2
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2019-2023 Linaro Ltd.
5 */
6
7 #include <linux/io.h>
8
9 #include "ipa.h"
10 #include "ipa_reg.h"
11
12 /* Is this register ID valid for the current IPA version? */
ipa_reg_id_valid(struct ipa * ipa,enum ipa_reg_id reg_id)13 static bool ipa_reg_id_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
14 {
15 enum ipa_version version = ipa->version;
16
17 switch (reg_id) {
18 case FILT_ROUT_HASH_EN:
19 return version == IPA_VERSION_4_2;
20
21 case FILT_ROUT_HASH_FLUSH:
22 return version < IPA_VERSION_5_0 && version != IPA_VERSION_4_2;
23
24 case FILT_ROUT_CACHE_FLUSH:
25 case ENDP_FILTER_CACHE_CFG:
26 case ENDP_ROUTER_CACHE_CFG:
27 return version >= IPA_VERSION_5_0;
28
29 case IPA_BCR:
30 case COUNTER_CFG:
31 return version < IPA_VERSION_4_5;
32
33 case IPA_TX_CFG:
34 case FLAVOR_0:
35 case IDLE_INDICATION_CFG:
36 return version >= IPA_VERSION_3_5;
37
38 case QTIME_TIMESTAMP_CFG:
39 case TIMERS_XO_CLK_DIV_CFG:
40 case TIMERS_PULSE_GRAN_CFG:
41 return version >= IPA_VERSION_4_5;
42
43 case SRC_RSRC_GRP_45_RSRC_TYPE:
44 case DST_RSRC_GRP_45_RSRC_TYPE:
45 return version <= IPA_VERSION_3_1 ||
46 version == IPA_VERSION_4_5 ||
47 version == IPA_VERSION_5_0;
48
49 case SRC_RSRC_GRP_67_RSRC_TYPE:
50 case DST_RSRC_GRP_67_RSRC_TYPE:
51 return version <= IPA_VERSION_3_1 ||
52 version == IPA_VERSION_5_0;
53
54 case ENDP_FILTER_ROUTER_HSH_CFG:
55 return version < IPA_VERSION_5_0 &&
56 version != IPA_VERSION_4_2;
57
58 case IRQ_SUSPEND_EN:
59 case IRQ_SUSPEND_CLR:
60 return version >= IPA_VERSION_3_1;
61
62 case COMP_CFG:
63 case CLKON_CFG:
64 case ROUTE:
65 case SHARED_MEM_SIZE:
66 case QSB_MAX_WRITES:
67 case QSB_MAX_READS:
68 case STATE_AGGR_ACTIVE:
69 case LOCAL_PKT_PROC_CNTXT:
70 case AGGR_FORCE_CLOSE:
71 case SRC_RSRC_GRP_01_RSRC_TYPE:
72 case SRC_RSRC_GRP_23_RSRC_TYPE:
73 case DST_RSRC_GRP_01_RSRC_TYPE:
74 case DST_RSRC_GRP_23_RSRC_TYPE:
75 case ENDP_INIT_CTRL:
76 case ENDP_INIT_CFG:
77 case ENDP_INIT_NAT:
78 case ENDP_INIT_HDR:
79 case ENDP_INIT_HDR_EXT:
80 case ENDP_INIT_HDR_METADATA_MASK:
81 case ENDP_INIT_MODE:
82 case ENDP_INIT_AGGR:
83 case ENDP_INIT_HOL_BLOCK_EN:
84 case ENDP_INIT_HOL_BLOCK_TIMER:
85 case ENDP_INIT_DEAGGR:
86 case ENDP_INIT_RSRC_GRP:
87 case ENDP_INIT_SEQ:
88 case ENDP_STATUS:
89 case IPA_IRQ_STTS:
90 case IPA_IRQ_EN:
91 case IPA_IRQ_CLR:
92 case IPA_IRQ_UC:
93 case IRQ_SUSPEND_INFO:
94 return true; /* These should be defined for all versions */
95
96 default:
97 return false;
98 }
99 }
100
ipa_reg(struct ipa * ipa,enum ipa_reg_id reg_id)101 const struct reg *ipa_reg(struct ipa *ipa, enum ipa_reg_id reg_id)
102 {
103 if (WARN(!ipa_reg_id_valid(ipa, reg_id), "invalid reg %u\n", reg_id))
104 return NULL;
105
106 return reg(ipa->regs, reg_id);
107 }
108
ipa_regs(enum ipa_version version)109 static const struct regs *ipa_regs(enum ipa_version version)
110 {
111 switch (version) {
112 case IPA_VERSION_3_1:
113 return &ipa_regs_v3_1;
114 case IPA_VERSION_3_5_1:
115 return &ipa_regs_v3_5_1;
116 case IPA_VERSION_4_2:
117 return &ipa_regs_v4_2;
118 case IPA_VERSION_4_5:
119 return &ipa_regs_v4_5;
120 case IPA_VERSION_4_7:
121 return &ipa_regs_v4_7;
122 case IPA_VERSION_4_9:
123 return &ipa_regs_v4_9;
124 case IPA_VERSION_4_11:
125 return &ipa_regs_v4_11;
126 case IPA_VERSION_5_0:
127 return &ipa_regs_v5_0;
128 default:
129 return NULL;
130 }
131 }
132
ipa_reg_init(struct ipa * ipa)133 int ipa_reg_init(struct ipa *ipa)
134 {
135 struct device *dev = &ipa->pdev->dev;
136 const struct regs *regs;
137 struct resource *res;
138
139 regs = ipa_regs(ipa->version);
140 if (!regs)
141 return -EINVAL;
142
143 if (WARN_ON(regs->reg_count > IPA_REG_ID_COUNT))
144 return -EINVAL;
145
146 /* Setup IPA register memory */
147 res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
148 "ipa-reg");
149 if (!res) {
150 dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
151 return -ENODEV;
152 }
153
154 ipa->reg_virt = ioremap(res->start, resource_size(res));
155 if (!ipa->reg_virt) {
156 dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
157 return -ENOMEM;
158 }
159 ipa->regs = regs;
160
161 return 0;
162 }
163
ipa_reg_exit(struct ipa * ipa)164 void ipa_reg_exit(struct ipa *ipa)
165 {
166 iounmap(ipa->reg_virt);
167 }
168