| Alex Elder | ba764c4 | 2020-03-05 22:28:19 -0600 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | |
| 3 | /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. |
| 4 | * Copyright (C) 2019-2020 Linaro Ltd. |
| 5 | */ |
| 6 | #ifndef _IPA_MEM_H_ |
| 7 | #define _IPA_MEM_H_ |
| 8 | |
| 9 | struct ipa; |
| 10 | |
| 11 | /** |
| 12 | * DOC: IPA Local Memory |
| 13 | * |
| 14 | * The IPA has a block of shared memory, divided into regions used for |
| 15 | * specific purposes. |
| 16 | * |
| 17 | * The regions within the shared block are bounded by an offset (relative to |
| 18 | * the "ipa-shared" memory range) and size found in the IPA_SHARED_MEM_SIZE |
| 19 | * register. |
| 20 | * |
| 21 | * Each region is optionally preceded by one or more 32-bit "canary" values. |
| 22 | * These are meant to detect out-of-range writes (if they become corrupted). |
| 23 | * A given region (such as a filter or routing table) has the same number |
| 24 | * of canaries for all IPA hardware versions. Still, the number used is |
| 25 | * defined in the config data, allowing for generic handling of regions. |
| 26 | * |
| 27 | * The set of memory regions is defined in configuration data. They are |
| 28 | * subject to these constraints: |
| 29 | * - a zero offset and zero size represents and undefined region |
| 30 | * - a region's offset is defined to be *past* all "canary" values |
| 31 | * - offset must be large enough to account for all canaries |
| 32 | * - a region's size may be zero, but may still have canaries |
| 33 | * - all offsets must be 8-byte aligned |
| 34 | * - most sizes must be a multiple of 8 |
| 35 | * - modem memory size must be a multiple of 4 |
| 36 | * - the microcontroller ring offset must be a multiple of 1024 |
| 37 | */ |
| 38 | |
| 39 | /* The maximum allowed size for any memory region */ |
| 40 | #define IPA_MEM_MAX (2 * PAGE_SIZE) |
| 41 | |
| 42 | /* IPA-resident memory region ids */ |
| 43 | enum ipa_mem_id { |
| 44 | IPA_MEM_UC_SHARED, /* 0 canaries */ |
| 45 | IPA_MEM_UC_INFO, /* 0 canaries */ |
| 46 | IPA_MEM_V4_FILTER_HASHED, /* 2 canaries */ |
| 47 | IPA_MEM_V4_FILTER, /* 2 canaries */ |
| 48 | IPA_MEM_V6_FILTER_HASHED, /* 2 canaries */ |
| 49 | IPA_MEM_V6_FILTER, /* 2 canaries */ |
| 50 | IPA_MEM_V4_ROUTE_HASHED, /* 2 canaries */ |
| 51 | IPA_MEM_V4_ROUTE, /* 2 canaries */ |
| 52 | IPA_MEM_V6_ROUTE_HASHED, /* 2 canaries */ |
| 53 | IPA_MEM_V6_ROUTE, /* 2 canaries */ |
| 54 | IPA_MEM_MODEM_HEADER, /* 2 canaries */ |
| 55 | IPA_MEM_AP_HEADER, /* 0 canaries */ |
| 56 | IPA_MEM_MODEM_PROC_CTX, /* 2 canaries */ |
| 57 | IPA_MEM_AP_PROC_CTX, /* 0 canaries */ |
| 58 | IPA_MEM_PDN_CONFIG, /* 2 canaries (IPA v4.0 and above) */ |
| 59 | IPA_MEM_STATS_QUOTA, /* 2 canaries (IPA v4.0 and above) */ |
| 60 | IPA_MEM_STATS_TETHERING, /* 0 canaries (IPA v4.0 and above) */ |
| 61 | IPA_MEM_STATS_DROP, /* 0 canaries (IPA v4.0 and above) */ |
| 62 | IPA_MEM_MODEM, /* 0 canaries */ |
| 63 | IPA_MEM_UC_EVENT_RING, /* 1 canary */ |
| 64 | IPA_MEM_COUNT, /* Number of regions (not an index) */ |
| 65 | }; |
| 66 | |
| 67 | /** |
| 68 | * struct ipa_mem - IPA local memory region description |
| 69 | * @offset: offset in IPA memory space to base of the region |
| 70 | * @size: size in bytes base of the region |
| 71 | * @canary_count # 32-bit "canary" values that precede region |
| 72 | */ |
| 73 | struct ipa_mem { |
| 74 | u32 offset; |
| 75 | u16 size; |
| 76 | u16 canary_count; |
| 77 | }; |
| 78 | |
| 79 | int ipa_mem_config(struct ipa *ipa); |
| 80 | void ipa_mem_deconfig(struct ipa *ipa); |
| 81 | |
| 82 | int ipa_mem_setup(struct ipa *ipa); |
| 83 | void ipa_mem_teardown(struct ipa *ipa); |
| 84 | |
| 85 | int ipa_mem_zero_modem(struct ipa *ipa); |
| 86 | |
| 87 | int ipa_mem_init(struct ipa *ipa, u32 count, const struct ipa_mem *mem); |
| 88 | void ipa_mem_exit(struct ipa *ipa); |
| 89 | |
| 90 | #endif /* _IPA_MEM_H_ */ |