1 /* SPDX-License-Identifier: GPL-2.0 */
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2019-2020 Linaro Ltd.
9 #include <linux/types.h>
10 #include <linux/dma-direction.h>
21 * enum ipa_cmd_opcode: IPA immediate commands
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.
26 * IPA_CMD_NONE is a special (invalid) value that's used to indicate
27 * a request is *not* an immediate command.
31 IPA_CMD_IP_V4_FILTER_INIT = 0x3,
32 IPA_CMD_IP_V6_FILTER_INIT = 0x4,
33 IPA_CMD_IP_V4_ROUTING_INIT = 0x7,
34 IPA_CMD_IP_V6_ROUTING_INIT = 0x8,
35 IPA_CMD_HDR_INIT_LOCAL = 0x9,
36 IPA_CMD_REGISTER_WRITE = 0xc,
37 IPA_CMD_IP_PACKET_INIT = 0x10,
38 IPA_CMD_DMA_SHARED_MEM = 0x13,
39 IPA_CMD_IP_PACKET_TAG_STATUS = 0x14,
43 * struct ipa_cmd_info - information needed for an IPA immediate command
45 * @opcode: The command opcode.
46 * @direction: Direction of data transfer for DMA commands
49 enum ipa_cmd_opcode opcode;
50 enum dma_data_direction direction;
56 * ipa_cmd_table_valid() - Validate a memory region holding a table
58 * @mem: - IPA memory region descriptor
59 * @route: - Whether the region holds a route or filter table
60 * @ipv6: - Whether the table is for IPv6 or IPv4
61 * @hashed: - Whether the table is hashed or non-hashed
63 * Return: true if region is valid, false otherwise
65 bool ipa_cmd_table_valid(struct ipa *ipa, const struct ipa_mem *mem,
66 bool route, bool ipv6, bool hashed);
69 * ipa_cmd_data_valid() - Validate command-realted configuration is valid
72 * Return: true if assumptions required for command are valid
74 bool ipa_cmd_data_valid(struct ipa *ipa);
76 #else /* !IPA_VALIDATE */
78 static inline bool ipa_cmd_table_valid(struct ipa *ipa,
79 const struct ipa_mem *mem, bool route,
80 bool ipv6, bool hashed)
85 static inline bool ipa_cmd_data_valid(struct ipa *ipa)
90 #endif /* !IPA_VALIDATE */
93 * ipa_cmd_pool_init() - initialize command channel pools
94 * @channel: AP->IPA command TX GSI channel pointer
95 * @tre_count: Number of pool elements to allocate
97 * Return: 0 if successful, or a negative error code
99 int ipa_cmd_pool_init(struct gsi_channel *gsi_channel, u32 tre_count);
102 * ipa_cmd_pool_exit() - Inverse of ipa_cmd_pool_init()
103 * @channel: AP->IPA command TX GSI channel pointer
105 void ipa_cmd_pool_exit(struct gsi_channel *channel);
108 * ipa_cmd_table_init_add() - Add table init command to a transaction
109 * @trans: GSI transaction
110 * @opcode: IPA immediate command opcode
111 * @size: Size of non-hashed routing table memory
112 * @offset: Offset in IPA shared memory of non-hashed routing table memory
113 * @addr: DMA address of non-hashed table data to write
114 * @hash_size: Size of hashed routing table memory
115 * @hash_offset: Offset in IPA shared memory of hashed routing table memory
116 * @hash_addr: DMA address of hashed table data to write
118 * If hash_size is 0, hash_offset and hash_addr are ignored.
120 void ipa_cmd_table_init_add(struct gsi_trans *trans, enum ipa_cmd_opcode opcode,
121 u16 size, u32 offset, dma_addr_t addr,
122 u16 hash_size, u32 hash_offset,
123 dma_addr_t hash_addr);
126 * ipa_cmd_hdr_init_local_add() - Add a header init command to a transaction
127 * @ipa: IPA structure
128 * @offset: Offset of header memory in IPA local space
129 * @size: Size of header memory
130 * @addr: DMA address of buffer to be written from
132 * Defines and fills the location in IPA memory to use for headers.
134 void ipa_cmd_hdr_init_local_add(struct gsi_trans *trans, u32 offset, u16 size,
138 * ipa_cmd_register_write_add() - Add a register write command to a transaction
139 * @trans: GSI transaction
140 * @offset: Offset of register to be written
141 * @value: Value to be written
142 * @mask: Mask of bits in register to update with bits from value
143 * @clear_full: Pipeline clear option; true means full pipeline clear
145 void ipa_cmd_register_write_add(struct gsi_trans *trans, u32 offset, u32 value,
146 u32 mask, bool clear_full);
149 * ipa_cmd_dma_shared_mem_add() - Add a DMA memory command to a transaction
150 * @trans: GSI transaction
151 * @offset: Offset of IPA memory to be read or written
152 * @size: Number of bytes of memory to be transferred
153 * @addr: DMA address of buffer to be read into or written from
154 * @toward_ipa: true means write to IPA memory; false means read
156 void ipa_cmd_dma_shared_mem_add(struct gsi_trans *trans, u32 offset,
157 u16 size, dma_addr_t addr, bool toward_ipa);
160 * ipa_cmd_tag_process_add() - Add IPA tag process commands to a transaction
161 * @trans: GSI transaction
163 void ipa_cmd_tag_process_add(struct gsi_trans *trans);
166 * ipa_cmd_tag_process_add_count() - Number of commands in a tag process
168 * Return: The number of elements to allocate in a transaction
169 * to hold tag process commands
171 u32 ipa_cmd_tag_process_count(void);
174 * ipa_cmd_tag_process() - Perform a tag process
176 * @Return: The number of elements to allocate in a transaction
177 * to hold tag process commands
179 void ipa_cmd_tag_process(struct ipa *ipa);
182 * ipa_cmd_trans_alloc() - Allocate a transaction for the command TX endpoint
184 * @tre_count: Number of elements in the transaction
186 * Return: A GSI transaction structure, or a null pointer if all
187 * available transactions are in use
189 struct gsi_trans *ipa_cmd_trans_alloc(struct ipa *ipa, u32 tre_count);
191 #endif /* _IPA_CMD_H_ */