xref: /openbmc/linux/drivers/net/ipa/ipa_reg.c (revision a5961bed) 
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? */
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 
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 
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 
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 
164 void ipa_reg_exit(struct ipa *ipa)
165 {
166 	iounmap(ipa->reg_virt);
167 }
168