xref: /openbmc/linux/drivers/net/ipa/ipa_reg.c (revision c29b9772) 
1 // SPDX-License-Identifier: GPL-2.0
2 
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4  * Copyright (C) 2019-2022 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 IPA_BCR:
19 	case COUNTER_CFG:
20 		return version < IPA_VERSION_4_5;
21 
22 	case IPA_TX_CFG:
23 	case FLAVOR_0:
24 	case IDLE_INDICATION_CFG:
25 		return version >= IPA_VERSION_3_5;
26 
27 	case QTIME_TIMESTAMP_CFG:
28 	case TIMERS_XO_CLK_DIV_CFG:
29 	case TIMERS_PULSE_GRAN_CFG:
30 		return version >= IPA_VERSION_4_5;
31 
32 	case SRC_RSRC_GRP_45_RSRC_TYPE:
33 	case DST_RSRC_GRP_45_RSRC_TYPE:
34 		return version <= IPA_VERSION_3_1 ||
35 		       version == IPA_VERSION_4_5;
36 
37 	case SRC_RSRC_GRP_67_RSRC_TYPE:
38 	case DST_RSRC_GRP_67_RSRC_TYPE:
39 		return version <= IPA_VERSION_3_1;
40 
41 	case ENDP_FILTER_ROUTER_HSH_CFG:
42 		return version != IPA_VERSION_4_2;
43 
44 	case IRQ_SUSPEND_EN:
45 	case IRQ_SUSPEND_CLR:
46 		return version >= IPA_VERSION_3_1;
47 
48 	case COMP_CFG:
49 	case CLKON_CFG:
50 	case ROUTE:
51 	case SHARED_MEM_SIZE:
52 	case QSB_MAX_WRITES:
53 	case QSB_MAX_READS:
54 	case FILT_ROUT_HASH_EN:
55 	case FILT_ROUT_CACHE_CFG:
56 	case FILT_ROUT_HASH_FLUSH:
57 	case FILT_ROUT_CACHE_FLUSH:
58 	case STATE_AGGR_ACTIVE:
59 	case LOCAL_PKT_PROC_CNTXT:
60 	case AGGR_FORCE_CLOSE:
61 	case SRC_RSRC_GRP_01_RSRC_TYPE:
62 	case SRC_RSRC_GRP_23_RSRC_TYPE:
63 	case DST_RSRC_GRP_01_RSRC_TYPE:
64 	case DST_RSRC_GRP_23_RSRC_TYPE:
65 	case ENDP_INIT_CTRL:
66 	case ENDP_INIT_CFG:
67 	case ENDP_INIT_NAT:
68 	case ENDP_INIT_HDR:
69 	case ENDP_INIT_HDR_EXT:
70 	case ENDP_INIT_HDR_METADATA_MASK:
71 	case ENDP_INIT_MODE:
72 	case ENDP_INIT_AGGR:
73 	case ENDP_INIT_HOL_BLOCK_EN:
74 	case ENDP_INIT_HOL_BLOCK_TIMER:
75 	case ENDP_INIT_DEAGGR:
76 	case ENDP_INIT_RSRC_GRP:
77 	case ENDP_INIT_SEQ:
78 	case ENDP_STATUS:
79 	case ENDP_FILTER_CACHE_CFG:
80 	case ENDP_ROUTER_CACHE_CFG:
81 	case IPA_IRQ_STTS:
82 	case IPA_IRQ_EN:
83 	case IPA_IRQ_CLR:
84 	case IPA_IRQ_UC:
85 	case IRQ_SUSPEND_INFO:
86 		return true;	/* These should be defined for all versions */
87 
88 	default:
89 		return false;
90 	}
91 }
92 
93 const struct reg *ipa_reg(struct ipa *ipa, enum ipa_reg_id reg_id)
94 {
95 	if (WARN(!ipa_reg_id_valid(ipa, reg_id), "invalid reg %u\n", reg_id))
96 		return NULL;
97 
98 	return reg(ipa->regs, reg_id);
99 }
100 
101 static const struct regs *ipa_regs(enum ipa_version version)
102 {
103 	switch (version) {
104 	case IPA_VERSION_3_1:
105 		return &ipa_regs_v3_1;
106 	case IPA_VERSION_3_5_1:
107 		return &ipa_regs_v3_5_1;
108 	case IPA_VERSION_4_2:
109 		return &ipa_regs_v4_2;
110 	case IPA_VERSION_4_5:
111 		return &ipa_regs_v4_5;
112 	case IPA_VERSION_4_7:
113 		return &ipa_regs_v4_7;
114 	case IPA_VERSION_4_9:
115 		return &ipa_regs_v4_9;
116 	case IPA_VERSION_4_11:
117 		return &ipa_regs_v4_11;
118 	default:
119 		return NULL;
120 	}
121 }
122 
123 int ipa_reg_init(struct ipa *ipa)
124 {
125 	struct device *dev = &ipa->pdev->dev;
126 	const struct regs *regs;
127 	struct resource *res;
128 
129 	regs = ipa_regs(ipa->version);
130 	if (!regs)
131 		return -EINVAL;
132 
133 	if (WARN_ON(regs->reg_count > IPA_REG_ID_COUNT))
134 		return -EINVAL;
135 
136 	/* Setup IPA register memory  */
137 	res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
138 					   "ipa-reg");
139 	if (!res) {
140 		dev_err(dev, "DT error getting \"ipa-reg\" memory property\n");
141 		return -ENODEV;
142 	}
143 
144 	ipa->reg_virt = ioremap(res->start, resource_size(res));
145 	if (!ipa->reg_virt) {
146 		dev_err(dev, "unable to remap \"ipa-reg\" memory\n");
147 		return -ENOMEM;
148 	}
149 	ipa->regs = regs;
150 
151 	return 0;
152 }
153 
154 void ipa_reg_exit(struct ipa *ipa)
155 {
156 	iounmap(ipa->reg_virt);
157 }
158