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? */
 13static 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
101const 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
109static 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	case IPA_VERSION_5_5:
129		return &ipa_regs_v5_5;
130	default:
131		return NULL;
132	}
133}
134
135int ipa_reg_init(struct ipa *ipa)
136{
137	struct device *dev = &ipa->pdev->dev;
138	const struct regs *regs;
139	struct resource *res;
140
141	regs = ipa_regs(ipa->version);
142	if (!regs)
143		return -EINVAL;
144
145	if (WARN_ON(regs->reg_count > IPA_REG_ID_COUNT))
146		return -EINVAL;
147
148	/* Setup IPA register memory  */
149	res = platform_get_resource_byname(ipa->pdev, IORESOURCE_MEM,
150					   "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
166void ipa_reg_exit(struct ipa *ipa)
167{
168	iounmap(ipa->reg_virt);
169}