1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. 4 * Copyright (C) 2019-2021 Linaro Ltd. 5 */ 6 #ifndef _IPA_MEM_H_ 7 #define _IPA_MEM_H_ 8 9 struct ipa; 10 struct ipa_mem_data; 11 12 /** 13 * DOC: IPA Local Memory 14 * 15 * The IPA has a block of shared memory, divided into regions used for 16 * specific purposes. 17 * 18 * The regions within the shared block are bounded by an offset (relative to 19 * the "ipa-shared" memory range) and size found in the IPA_SHARED_MEM_SIZE 20 * register. 21 * 22 * Each region is optionally preceded by one or more 32-bit "canary" values. 23 * These are meant to detect out-of-range writes (if they become corrupted). 24 * A given region (such as a filter or routing table) has the same number 25 * of canaries for all IPA hardware versions. Still, the number used is 26 * defined in the config data, allowing for generic handling of regions. 27 * 28 * The set of memory regions is defined in configuration data. They are 29 * subject to these constraints: 30 * - a zero offset and zero size represents and undefined region 31 * - a region's size does not include space for its "canary" values 32 * - a region's offset is defined to be *past* all "canary" values 33 * - offset must be large enough to account for all canaries 34 * - a region's size may be zero, but may still have canaries 35 * - all offsets must be 8-byte aligned 36 * - most sizes must be a multiple of 8 37 * - modem memory size must be a multiple of 4 38 * - the microcontroller ring offset must be a multiple of 1024 39 */ 40 41 /* The maximum allowed size for any memory region */ 42 #define IPA_MEM_MAX (2 * PAGE_SIZE) 43 44 /* IPA-resident memory region ids */ 45 enum ipa_mem_id { 46 IPA_MEM_UC_SHARED, /* 0 canaries */ 47 IPA_MEM_UC_INFO, /* 0 canaries */ 48 IPA_MEM_V4_FILTER_HASHED, /* 2 canaries */ 49 IPA_MEM_V4_FILTER, /* 2 canaries */ 50 IPA_MEM_V6_FILTER_HASHED, /* 2 canaries */ 51 IPA_MEM_V6_FILTER, /* 2 canaries */ 52 IPA_MEM_V4_ROUTE_HASHED, /* 2 canaries */ 53 IPA_MEM_V4_ROUTE, /* 2 canaries */ 54 IPA_MEM_V6_ROUTE_HASHED, /* 2 canaries */ 55 IPA_MEM_V6_ROUTE, /* 2 canaries */ 56 IPA_MEM_MODEM_HEADER, /* 2 canaries */ 57 IPA_MEM_AP_HEADER, /* 0 canaries */ 58 IPA_MEM_MODEM_PROC_CTX, /* 2 canaries */ 59 IPA_MEM_AP_PROC_CTX, /* 0 canaries */ 60 IPA_MEM_NAT_TABLE, /* 4 canaries (IPA v4.5 and above) */ 61 IPA_MEM_PDN_CONFIG, /* 0/2 canaries (IPA v4.0 and above) */ 62 IPA_MEM_STATS_QUOTA_MODEM, /* 2/4 canaries (IPA v4.0 and above) */ 63 IPA_MEM_STATS_QUOTA_AP, /* 0 canaries (IPA v4.0 and above) */ 64 IPA_MEM_STATS_TETHERING, /* 0 canaries (IPA v4.0 and above) */ 65 IPA_MEM_STATS_V4_FILTER, /* 0 canaries (IPA v4.0-v4.2) */ 66 IPA_MEM_STATS_V6_FILTER, /* 0 canaries (IPA v4.0-v4.2) */ 67 IPA_MEM_STATS_V4_ROUTE, /* 0 canaries (IPA v4.0-v4.2) */ 68 IPA_MEM_STATS_V6_ROUTE, /* 0 canaries (IPA v4.0-v4.2) */ 69 IPA_MEM_STATS_FILTER_ROUTE, /* 0 canaries (IPA v4.5 and above) */ 70 IPA_MEM_STATS_DROP, /* 0 canaries (IPA v4.0 and above) */ 71 IPA_MEM_MODEM, /* 0/2 canaries */ 72 IPA_MEM_UC_EVENT_RING, /* 1 canary */ 73 IPA_MEM_COUNT, /* Number of regions (not an index) */ 74 }; 75 76 /** 77 * struct ipa_mem - IPA local memory region description 78 * @offset: offset in IPA memory space to base of the region 79 * @size: size in bytes base of the region 80 * @canary_count: Number of 32-bit "canary" values that precede region 81 */ 82 struct ipa_mem { 83 u32 offset; 84 u16 size; 85 u16 canary_count; 86 }; 87 88 int ipa_mem_config(struct ipa *ipa); 89 void ipa_mem_deconfig(struct ipa *ipa); 90 91 int ipa_mem_setup(struct ipa *ipa); /* No ipa_mem_teardown() needed */ 92 93 int ipa_mem_zero_modem(struct ipa *ipa); 94 95 int ipa_mem_init(struct ipa *ipa, const struct ipa_mem_data *mem_data); 96 void ipa_mem_exit(struct ipa *ipa); 97 98 #endif /* _IPA_MEM_H_ */ 99