176 lines
5.6 KiB
C
176 lines
5.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2019-2022 Linaro Ltd.
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*/
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#ifndef _IPA_CMD_H_
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#define _IPA_CMD_H_
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#include <linux/types.h>
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#include <linux/dma-direction.h>
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struct sk_buff;
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struct scatterlist;
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struct ipa;
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struct ipa_mem;
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struct gsi_trans;
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struct gsi_channel;
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/**
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* enum ipa_cmd_opcode: IPA immediate commands
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*
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* @IPA_CMD_IP_V4_FILTER_INIT: Initialize IPv4 filter table
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* @IPA_CMD_IP_V6_FILTER_INIT: Initialize IPv6 filter table
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* @IPA_CMD_IP_V4_ROUTING_INIT: Initialize IPv4 routing table
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* @IPA_CMD_IP_V6_ROUTING_INIT: Initialize IPv6 routing table
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* @IPA_CMD_HDR_INIT_LOCAL: Initialize IPA-local header memory
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* @IPA_CMD_REGISTER_WRITE: Register write performed by IPA
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* @IPA_CMD_IP_PACKET_INIT: Set up next packet's destination endpoint
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* @IPA_CMD_DMA_SHARED_MEM: DMA command performed by IPA
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* @IPA_CMD_IP_PACKET_TAG_STATUS: Have next packet generate tag * status
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* @IPA_CMD_NONE: Special (invalid) "not a command" value
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*
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* All immediate commands are issued using the AP command TX endpoint.
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*/
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enum ipa_cmd_opcode {
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IPA_CMD_NONE = 0x0,
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IPA_CMD_IP_V4_FILTER_INIT = 0x3,
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IPA_CMD_IP_V6_FILTER_INIT = 0x4,
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IPA_CMD_IP_V4_ROUTING_INIT = 0x7,
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IPA_CMD_IP_V6_ROUTING_INIT = 0x8,
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IPA_CMD_HDR_INIT_LOCAL = 0x9,
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IPA_CMD_REGISTER_WRITE = 0xc,
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IPA_CMD_IP_PACKET_INIT = 0x10,
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IPA_CMD_DMA_SHARED_MEM = 0x13,
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IPA_CMD_IP_PACKET_TAG_STATUS = 0x14,
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};
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/**
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* ipa_cmd_table_init_valid() - Validate a memory region holding a table
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* @ipa: - IPA pointer
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* @mem: - IPA memory region descriptor
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* @route: - Whether the region holds a route or filter table
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*
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* Return: true if region is valid, false otherwise
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*/
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bool ipa_cmd_table_init_valid(struct ipa *ipa, const struct ipa_mem *mem,
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bool route);
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/**
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* ipa_cmd_data_valid() - Validate command-realted configuration is valid
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* @ipa: - IPA pointer
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*
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* Return: true if assumptions required for command are valid
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*/
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bool ipa_cmd_data_valid(struct ipa *ipa);
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/**
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* ipa_cmd_pool_init() - initialize command channel pools
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* @channel: AP->IPA command TX GSI channel pointer
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* @tre_count: Number of pool elements to allocate
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*
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* Return: 0 if successful, or a negative error code
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*/
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int ipa_cmd_pool_init(struct gsi_channel *channel, u32 tre_count);
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/**
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* ipa_cmd_pool_exit() - Inverse of ipa_cmd_pool_init()
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* @channel: AP->IPA command TX GSI channel pointer
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*/
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void ipa_cmd_pool_exit(struct gsi_channel *channel);
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/**
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* ipa_cmd_table_init_add() - Add table init command to a transaction
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* @trans: GSI transaction
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* @opcode: IPA immediate command opcode
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* @size: Size of non-hashed routing table memory
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* @offset: Offset in IPA shared memory of non-hashed routing table memory
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* @addr: DMA address of non-hashed table data to write
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* @hash_size: Size of hashed routing table memory
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* @hash_offset: Offset in IPA shared memory of hashed routing table memory
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* @hash_addr: DMA address of hashed table data to write
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*
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* If hash_size is 0, hash_offset and hash_addr are ignored.
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*/
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void ipa_cmd_table_init_add(struct gsi_trans *trans, enum ipa_cmd_opcode opcode,
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u16 size, u32 offset, dma_addr_t addr,
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u16 hash_size, u32 hash_offset,
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dma_addr_t hash_addr);
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/**
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* ipa_cmd_hdr_init_local_add() - Add a header init command to a transaction
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* @trans: GSI transaction
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* @offset: Offset of header memory in IPA local space
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* @size: Size of header memory
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* @addr: DMA address of buffer to be written from
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*
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* Defines and fills the location in IPA memory to use for headers.
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*/
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void ipa_cmd_hdr_init_local_add(struct gsi_trans *trans, u32 offset, u16 size,
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dma_addr_t addr);
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/**
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* ipa_cmd_register_write_add() - Add a register write command to a transaction
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* @trans: GSI transaction
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* @offset: Offset of register to be written
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* @value: Value to be written
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* @mask: Mask of bits in register to update with bits from value
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* @clear_full: Pipeline clear option; true means full pipeline clear
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*/
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void ipa_cmd_register_write_add(struct gsi_trans *trans, u32 offset, u32 value,
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u32 mask, bool clear_full);
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/**
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* ipa_cmd_dma_shared_mem_add() - Add a DMA memory command to a transaction
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* @trans: GSI transaction
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* @offset: Offset of IPA memory to be read or written
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* @size: Number of bytes of memory to be transferred
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* @addr: DMA address of buffer to be read into or written from
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* @toward_ipa: true means write to IPA memory; false means read
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*/
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void ipa_cmd_dma_shared_mem_add(struct gsi_trans *trans, u32 offset,
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u16 size, dma_addr_t addr, bool toward_ipa);
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/**
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* ipa_cmd_pipeline_clear_add() - Add pipeline clear commands to a transaction
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* @trans: GSI transaction
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*/
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void ipa_cmd_pipeline_clear_add(struct gsi_trans *trans);
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/**
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* ipa_cmd_pipeline_clear_count() - # commands required to clear pipeline
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*
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* Return: The number of elements to allocate in a transaction
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* to hold commands to clear the pipeline
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*/
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u32 ipa_cmd_pipeline_clear_count(void);
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/**
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* ipa_cmd_pipeline_clear_wait() - Wait pipeline clear to complete
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* @ipa: - IPA pointer
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*/
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void ipa_cmd_pipeline_clear_wait(struct ipa *ipa);
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/**
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* ipa_cmd_trans_alloc() - Allocate a transaction for the command TX endpoint
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* @ipa: IPA pointer
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* @tre_count: Number of elements in the transaction
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*
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* Return: A GSI transaction structure, or a null pointer if all
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* available transactions are in use
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*/
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struct gsi_trans *ipa_cmd_trans_alloc(struct ipa *ipa, u32 tre_count);
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/**
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* ipa_cmd_init() - Initialize IPA immediate commands
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* @ipa: - IPA pointer
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*
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* Return: 0 if successful, or a negative error code
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*
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* There is no need for a matching ipa_cmd_exit() function.
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*/
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int ipa_cmd_init(struct ipa *ipa);
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#endif /* _IPA_CMD_H_ */
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