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_CMD_H_ 7 #define _IPA_CMD_H_ 8 9 #include <linux/types.h> 10 #include <linux/dma-direction.h> 11 12 struct sk_buff; 13 struct scatterlist; 14 15 struct ipa; 16 struct ipa_mem; 17 struct gsi_trans; 18 struct gsi_channel; 19 20 /** 21 * enum ipa_cmd_opcode: IPA immediate commands 22 * 23 * All immediate commands are issued using the AP command TX endpoint. 24 * The numeric values here are the opcodes for IPA v3.5.1 hardware. 25 * 26 * IPA_CMD_NONE is a special (invalid) value that's used to indicate 27 * a request is *not* an immediate command. 28 */ 29 enum ipa_cmd_opcode { 30 IPA_CMD_NONE = 0, 31 IPA_CMD_IP_V4_FILTER_INIT = 3, 32 IPA_CMD_IP_V6_FILTER_INIT = 4, 33 IPA_CMD_IP_V4_ROUTING_INIT = 7, 34 IPA_CMD_IP_V6_ROUTING_INIT = 8, 35 IPA_CMD_HDR_INIT_LOCAL = 9, 36 IPA_CMD_REGISTER_WRITE = 12, 37 IPA_CMD_IP_PACKET_INIT = 16, 38 IPA_CMD_DMA_SHARED_MEM = 19, 39 IPA_CMD_IP_PACKET_TAG_STATUS = 20, 40 }; 41 42 /** 43 * struct ipa_cmd_info - information needed for an IPA immediate command 44 * 45 * @opcode: The command opcode. 46 * @direction: Direction of data transfer for DMA commands 47 */ 48 struct ipa_cmd_info { 49 enum ipa_cmd_opcode opcode; 50 enum dma_data_direction direction; 51 }; 52 53 54 #ifdef IPA_VALIDATE 55 56 /** 57 * ipa_cmd_table_valid() - Validate a memory region holding a table 58 * @ipa: - IPA pointer 59 * @mem: - IPA memory region descriptor 60 * @route: - Whether the region holds a route or filter table 61 * @ipv6: - Whether the table is for IPv6 or IPv4 62 * @hashed: - Whether the table is hashed or non-hashed 63 * 64 * @Return: true if region is valid, false otherwise 65 */ 66 bool ipa_cmd_table_valid(struct ipa *ipa, const struct ipa_mem *mem, 67 bool route, bool ipv6, bool hashed); 68 69 /** 70 * ipa_cmd_data_valid() - Validate command-realted configuration is valid 71 * @ipa: - IPA pointer 72 * 73 * @Return: true if assumptions required for command are valid 74 */ 75 bool ipa_cmd_data_valid(struct ipa *ipa); 76 77 #else /* !IPA_VALIDATE */ 78 79 static inline bool ipa_cmd_table_valid(struct ipa *ipa, 80 const struct ipa_mem *mem, bool route, 81 bool ipv6, bool hashed) 82 { 83 return true; 84 } 85 86 static inline bool ipa_cmd_data_valid(struct ipa *ipa) 87 { 88 return true; 89 } 90 91 #endif /* !IPA_VALIDATE */ 92 93 /** 94 * ipa_cmd_pool_init() - initialize command channel pools 95 * @channel: AP->IPA command TX GSI channel pointer 96 * @tre_count: Number of pool elements to allocate 97 * 98 * @Return: 0 if successful, or a negative error code 99 */ 100 int ipa_cmd_pool_init(struct gsi_channel *gsi_channel, u32 tre_count); 101 102 /** 103 * ipa_cmd_pool_exit() - Inverse of ipa_cmd_pool_init() 104 * @channel: AP->IPA command TX GSI channel pointer 105 */ 106 void ipa_cmd_pool_exit(struct gsi_channel *channel); 107 108 /** 109 * ipa_cmd_table_init_add() - Add table init command to a transaction 110 * @trans: GSI transaction 111 * @opcode: IPA immediate command opcode 112 * @size: Size of non-hashed routing table memory 113 * @offset: Offset in IPA shared memory of non-hashed routing table memory 114 * @addr: DMA address of non-hashed table data to write 115 * @hash_size: Size of hashed routing table memory 116 * @hash_offset: Offset in IPA shared memory of hashed routing table memory 117 * @hash_addr: DMA address of hashed table data to write 118 * 119 * If hash_size is 0, hash_offset and hash_addr are ignored. 120 */ 121 void ipa_cmd_table_init_add(struct gsi_trans *trans, enum ipa_cmd_opcode opcode, 122 u16 size, u32 offset, dma_addr_t addr, 123 u16 hash_size, u32 hash_offset, 124 dma_addr_t hash_addr); 125 126 /** 127 * ipa_cmd_hdr_init_local_add() - Add a header init command to a transaction 128 * @ipa: IPA structure 129 * @offset: Offset of header memory in IPA local space 130 * @size: Size of header memory 131 * @addr: DMA address of buffer to be written from 132 * 133 * Defines and fills the location in IPA memory to use for headers. 134 */ 135 void ipa_cmd_hdr_init_local_add(struct gsi_trans *trans, u32 offset, u16 size, 136 dma_addr_t addr); 137 138 /** 139 * ipa_cmd_register_write_add() - Add a register write command to a transaction 140 * @trans: GSI transaction 141 * @offset: Offset of register to be written 142 * @value: Value to be written 143 * @mask: Mask of bits in register to update with bits from value 144 * @clear_full: Pipeline clear option; true means full pipeline clear 145 */ 146 void ipa_cmd_register_write_add(struct gsi_trans *trans, u32 offset, u32 value, 147 u32 mask, bool clear_full); 148 149 /** 150 * ipa_cmd_dma_shared_mem_add() - Add a DMA memory command to a transaction 151 * @trans: GSI transaction 152 * @offset: Offset of IPA memory to be read or written 153 * @size: Number of bytes of memory to be transferred 154 * @addr: DMA address of buffer to be read into or written from 155 * @toward_ipa: true means write to IPA memory; false means read 156 */ 157 void ipa_cmd_dma_shared_mem_add(struct gsi_trans *trans, u32 offset, 158 u16 size, dma_addr_t addr, bool toward_ipa); 159 160 /** 161 * ipa_cmd_tag_process_add() - Add IPA tag process commands to a transaction 162 * @trans: GSI transaction 163 */ 164 void ipa_cmd_tag_process_add(struct gsi_trans *trans); 165 166 /** 167 * ipa_cmd_tag_process_add_count() - Number of commands in a tag process 168 * 169 * @Return: The number of elements to allocate in a transaction 170 * to hold tag process commands 171 */ 172 u32 ipa_cmd_tag_process_count(void); 173 174 /** 175 * ipa_cmd_trans_alloc() - Allocate a transaction for the command TX endpoint 176 * @ipa: IPA pointer 177 * @tre_count: Number of elements in the transaction 178 * 179 * @Return: A GSI transaction structure, or a null pointer if all 180 * available transactions are in use 181 */ 182 struct gsi_trans *ipa_cmd_trans_alloc(struct ipa *ipa, u32 tre_count); 183 184 #endif /* _IPA_CMD_H_ */ 185