1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. 4 * Copyright (C) 2019-2024 Linaro Ltd. 5 */ 6 #ifndef _IPA_CMD_H_ 7 #define _IPA_CMD_H_ 8 9 #include <linux/types.h> 10 11 struct gsi_channel; 12 struct gsi_trans; 13 struct ipa; 14 struct ipa_mem; 15 16 /** 17 * enum ipa_cmd_opcode: IPA immediate commands 18 * 19 * @IPA_CMD_IP_V4_FILTER_INIT: Initialize IPv4 filter table 20 * @IPA_CMD_IP_V6_FILTER_INIT: Initialize IPv6 filter table 21 * @IPA_CMD_IP_V4_ROUTING_INIT: Initialize IPv4 routing table 22 * @IPA_CMD_IP_V6_ROUTING_INIT: Initialize IPv6 routing table 23 * @IPA_CMD_HDR_INIT_LOCAL: Initialize IPA-local header memory 24 * @IPA_CMD_REGISTER_WRITE: Register write performed by IPA 25 * @IPA_CMD_IP_PACKET_INIT: Set up next packet's destination endpoint 26 * @IPA_CMD_DMA_SHARED_MEM: DMA command performed by IPA 27 * @IPA_CMD_IP_PACKET_TAG_STATUS: Have next packet generate tag * status 28 * @IPA_CMD_NONE: Special (invalid) "not a command" value 29 * 30 * All immediate commands are issued using the AP command TX endpoint. 31 */ 32 enum ipa_cmd_opcode { 33 IPA_CMD_NONE = 0x0, 34 IPA_CMD_IP_V4_FILTER_INIT = 0x3, 35 IPA_CMD_IP_V6_FILTER_INIT = 0x4, 36 IPA_CMD_IP_V4_ROUTING_INIT = 0x7, 37 IPA_CMD_IP_V6_ROUTING_INIT = 0x8, 38 IPA_CMD_HDR_INIT_LOCAL = 0x9, 39 IPA_CMD_REGISTER_WRITE = 0xc, 40 IPA_CMD_IP_PACKET_INIT = 0x10, 41 IPA_CMD_DMA_SHARED_MEM = 0x13, 42 IPA_CMD_IP_PACKET_TAG_STATUS = 0x14, 43 }; 44 45 /** 46 * ipa_cmd_table_init_valid() - Validate a memory region holding a table 47 * @ipa: - IPA pointer 48 * @mem: - IPA memory region descriptor 49 * @route: - Whether the region holds a route or filter table 50 * 51 * Return: true if region is valid, false otherwise 52 */ 53 bool ipa_cmd_table_init_valid(struct ipa *ipa, const struct ipa_mem *mem, 54 bool route); 55 56 /** 57 * ipa_cmd_pool_init() - initialize command channel pools 58 * @channel: AP->IPA command TX GSI channel pointer 59 * @tre_count: Number of pool elements to allocate 60 * 61 * Return: 0 if successful, or a negative error code 62 */ 63 int ipa_cmd_pool_init(struct gsi_channel *channel, u32 tre_count); 64 65 /** 66 * ipa_cmd_pool_exit() - Inverse of ipa_cmd_pool_init() 67 * @channel: AP->IPA command TX GSI channel pointer 68 */ 69 void ipa_cmd_pool_exit(struct gsi_channel *channel); 70 71 /** 72 * ipa_cmd_table_init_add() - Add table init command to a transaction 73 * @trans: GSI transaction 74 * @opcode: IPA immediate command opcode 75 * @size: Size of non-hashed routing table memory 76 * @offset: Offset in IPA shared memory of non-hashed routing table memory 77 * @addr: DMA address of non-hashed table data to write 78 * @hash_size: Size of hashed routing table memory 79 * @hash_offset: Offset in IPA shared memory of hashed routing table memory 80 * @hash_addr: DMA address of hashed table data to write 81 * 82 * If hash_size is 0, hash_offset and hash_addr are ignored. 83 */ 84 void ipa_cmd_table_init_add(struct gsi_trans *trans, enum ipa_cmd_opcode opcode, 85 u16 size, u32 offset, dma_addr_t addr, 86 u16 hash_size, u32 hash_offset, 87 dma_addr_t hash_addr); 88 89 /** 90 * ipa_cmd_hdr_init_local_add() - Add a header init command to a transaction 91 * @trans: GSI transaction 92 * @offset: Offset of header memory in IPA local space 93 * @size: Size of header memory 94 * @addr: DMA address of buffer to be written from 95 * 96 * Defines and fills the location in IPA memory to use for headers. 97 */ 98 void ipa_cmd_hdr_init_local_add(struct gsi_trans *trans, u32 offset, u16 size, 99 dma_addr_t addr); 100 101 /** 102 * ipa_cmd_register_write_add() - Add a register write command to a transaction 103 * @trans: GSI transaction 104 * @offset: Offset of register to be written 105 * @value: Value to be written 106 * @mask: Mask of bits in register to update with bits from value 107 * @clear_full: Pipeline clear option; true means full pipeline clear 108 */ 109 void ipa_cmd_register_write_add(struct gsi_trans *trans, u32 offset, u32 value, 110 u32 mask, bool clear_full); 111 112 /** 113 * ipa_cmd_dma_shared_mem_add() - Add a DMA memory command to a transaction 114 * @trans: GSI transaction 115 * @offset: Offset of IPA memory to be read or written 116 * @size: Number of bytes of memory to be transferred 117 * @addr: DMA address of buffer to be read into or written from 118 * @toward_ipa: true means write to IPA memory; false means read 119 */ 120 void ipa_cmd_dma_shared_mem_add(struct gsi_trans *trans, u32 offset, 121 u16 size, dma_addr_t addr, bool toward_ipa); 122 123 /** 124 * ipa_cmd_pipeline_clear_add() - Add pipeline clear commands to a transaction 125 * @trans: GSI transaction 126 */ 127 void ipa_cmd_pipeline_clear_add(struct gsi_trans *trans); 128 129 /** 130 * ipa_cmd_pipeline_clear_count() - # commands required to clear pipeline 131 * 132 * Return: The number of elements to allocate in a transaction 133 * to hold commands to clear the pipeline 134 */ 135 u32 ipa_cmd_pipeline_clear_count(void); 136 137 /** 138 * ipa_cmd_pipeline_clear_wait() - Wait pipeline clear to complete 139 * @ipa: - IPA pointer 140 */ 141 void ipa_cmd_pipeline_clear_wait(struct ipa *ipa); 142 143 /** 144 * ipa_cmd_trans_alloc() - Allocate a transaction for the command TX endpoint 145 * @ipa: IPA pointer 146 * @tre_count: Number of elements in the transaction 147 * 148 * Return: A GSI transaction structure, or a null pointer if all 149 * available transactions are in use 150 */ 151 struct gsi_trans *ipa_cmd_trans_alloc(struct ipa *ipa, u32 tre_count); 152 153 /** 154 * ipa_cmd_init() - Initialize IPA immediate commands 155 * @ipa: - IPA pointer 156 * 157 * Return: 0 if successful, or a negative error code 158 * 159 * There is no need for a matching ipa_cmd_exit() function. 160 */ 161 int ipa_cmd_init(struct ipa *ipa); 162 163 #endif /* _IPA_CMD_H_ */ 164