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[linux.git] / drivers / net / ipa / ipa_reg.c
1 // SPDX-License-Identifier: GPL-2.0
2
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4  * Copyright (C) 2019-2024 Linaro Ltd.
5  */
6
7 #include <linux/io.h>
8 #include <linux/platform_device.h>
9
10 #include "ipa.h"
11 #include "ipa_reg.h"
12
13 /* Is this register ID valid for the current IPA version? */
14 static bool ipa_reg_id_valid(struct ipa *ipa, enum ipa_reg_id reg_id)
15 {
16         enum ipa_version version = ipa->version;
17
18         switch (reg_id) {
19         case FILT_ROUT_HASH_EN:
20                 return version == IPA_VERSION_4_2;
21
22         case FILT_ROUT_HASH_FLUSH:
23                 return version < IPA_VERSION_5_0 && version != IPA_VERSION_4_2;
24
25         case FILT_ROUT_CACHE_FLUSH:
26         case ENDP_FILTER_CACHE_CFG:
27         case ENDP_ROUTER_CACHE_CFG:
28                 return version >= IPA_VERSION_5_0;
29
30         case IPA_BCR:
31         case COUNTER_CFG:
32                 return version < IPA_VERSION_4_5;
33
34         case IPA_TX_CFG:
35         case FLAVOR_0:
36         case IDLE_INDICATION_CFG:
37                 return version >= IPA_VERSION_3_5;
38
39         case QTIME_TIMESTAMP_CFG:
40         case TIMERS_XO_CLK_DIV_CFG:
41         case TIMERS_PULSE_GRAN_CFG:
42                 return version >= IPA_VERSION_4_5;
43
44         case SRC_RSRC_GRP_45_RSRC_TYPE:
45         case DST_RSRC_GRP_45_RSRC_TYPE:
46                 return version <= IPA_VERSION_3_1 ||
47                        version == IPA_VERSION_4_5 ||
48                        version >= IPA_VERSION_5_0;
49
50         case SRC_RSRC_GRP_67_RSRC_TYPE:
51         case DST_RSRC_GRP_67_RSRC_TYPE:
52                 return version <= IPA_VERSION_3_1 ||
53                        version >= IPA_VERSION_5_0;
54
55         case ENDP_FILTER_ROUTER_HSH_CFG:
56                 return version < IPA_VERSION_5_0 &&
57                         version != IPA_VERSION_4_2;
58
59         case IRQ_SUSPEND_EN:
60         case IRQ_SUSPEND_CLR:
61                 return version >= IPA_VERSION_3_1;
62
63         case COMP_CFG:
64         case CLKON_CFG:
65         case ROUTE:
66         case SHARED_MEM_SIZE:
67         case QSB_MAX_WRITES:
68         case QSB_MAX_READS:
69         case STATE_AGGR_ACTIVE:
70         case LOCAL_PKT_PROC_CNTXT:
71         case AGGR_FORCE_CLOSE:
72         case SRC_RSRC_GRP_01_RSRC_TYPE:
73         case SRC_RSRC_GRP_23_RSRC_TYPE:
74         case DST_RSRC_GRP_01_RSRC_TYPE:
75         case DST_RSRC_GRP_23_RSRC_TYPE:
76         case ENDP_INIT_CTRL:
77         case ENDP_INIT_CFG:
78         case ENDP_INIT_NAT:
79         case ENDP_INIT_HDR:
80         case ENDP_INIT_HDR_EXT:
81         case ENDP_INIT_HDR_METADATA_MASK:
82         case ENDP_INIT_MODE:
83         case ENDP_INIT_AGGR:
84         case ENDP_INIT_HOL_BLOCK_EN:
85         case ENDP_INIT_HOL_BLOCK_TIMER:
86         case ENDP_INIT_DEAGGR:
87         case ENDP_INIT_RSRC_GRP:
88         case ENDP_INIT_SEQ:
89         case ENDP_STATUS:
90         case IPA_IRQ_STTS:
91         case IPA_IRQ_EN:
92         case IPA_IRQ_CLR:
93         case IPA_IRQ_UC:
94         case IRQ_SUSPEND_INFO:
95                 return true;    /* These should be defined for all versions */
96
97         default:
98                 return false;
99         }
100 }
101
102 const struct reg *ipa_reg(struct ipa *ipa, enum ipa_reg_id reg_id)
103 {
104         if (WARN(!ipa_reg_id_valid(ipa, reg_id), "invalid reg %u\n", reg_id))
105                 return NULL;
106
107         return reg(ipa->regs, reg_id);
108 }
109
110 static const struct regs *ipa_regs(enum ipa_version version)
111 {
112         switch (version) {
113         case IPA_VERSION_3_1:
114                 return &ipa_regs_v3_1;
115         case IPA_VERSION_3_5_1:
116                 return &ipa_regs_v3_5_1;
117         case IPA_VERSION_4_2:
118                 return &ipa_regs_v4_2;
119         case IPA_VERSION_4_5:
120                 return &ipa_regs_v4_5;
121         case IPA_VERSION_4_7:
122                 return &ipa_regs_v4_7;
123         case IPA_VERSION_4_9:
124                 return &ipa_regs_v4_9;
125         case IPA_VERSION_4_11:
126                 return &ipa_regs_v4_11;
127         case IPA_VERSION_5_0:
128                 return &ipa_regs_v5_0;
129         case IPA_VERSION_5_5:
130                 return &ipa_regs_v5_5;
131         default:
132                 return NULL;
133         }
134 }
135
136 int ipa_reg_init(struct ipa *ipa, struct platform_device *pdev)
137 {
138         struct device *dev = &pdev->dev;
139         const struct regs *regs;
140         struct resource *res;
141
142         regs = ipa_regs(ipa->version);
143         if (!regs)
144                 return -EINVAL;
145
146         if (WARN_ON(regs->reg_count > IPA_REG_ID_COUNT))
147                 return -EINVAL;
148
149         /* Setup IPA register memory  */
150         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ipa-reg");
151         if (!res) {
152                 dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
153                 return -ENODEV;
154         }
155
156         ipa->reg_virt = ioremap(res->start, resource_size(res));
157         if (!ipa->reg_virt) {
158                 dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
159                 return -ENOMEM;
160         }
161         ipa->regs = regs;
162
163         return 0;
164 }
165
166 void ipa_reg_exit(struct ipa *ipa)
167 {
168         iounmap(ipa->reg_virt);
169 }
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