xref: /linux/drivers/net/ipa/ipa_reg.c (revision dbcedec3a31119d7594baacc743300d127c99c56) 
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/platform_device.h>
8 #include <linux/io.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 }
170