/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
* Copyright ( C ) 2019 - 2024 Linaro Ltd .
*/
#ifndef _IPA_CMD_H_
#define _IPA_CMD_H_
#include <linux/types.h>
struct gsi_channel;
struct gsi_trans;
struct ipa;
struct ipa_mem;
/**
* enum ipa_cmd_opcode : IPA immediate commands
*
* @ IPA_CMD_IP_V4_FILTER_INIT : Initialize IPv4 filter table
* @ IPA_CMD_IP_V6_FILTER_INIT : Initialize IPv6 filter table
* @ IPA_CMD_IP_V4_ROUTING_INIT : Initialize IPv4 routing table
* @ IPA_CMD_IP_V6_ROUTING_INIT : Initialize IPv6 routing table
* @ IPA_CMD_HDR_INIT_LOCAL : Initialize IPA - local header memory
* @ IPA_CMD_REGISTER_WRITE : Register write performed by IPA
* @ IPA_CMD_IP_PACKET_INIT : Set up next packet ' s destination endpoint
* @ IPA_CMD_DMA_SHARED_MEM : DMA command performed by IPA
* @ IPA_CMD_IP_PACKET_TAG_STATUS : Have next packet generate tag * status
* @ IPA_CMD_NONE : Special ( invalid ) " not a command " value
*
* All immediate commands are issued using the AP command TX endpoint .
*/
enum ipa_cmd_opcode {
IPA_CMD_NONE = 0 x0,
IPA_CMD_IP_V4_FILTER_INIT = 0 x3,
IPA_CMD_IP_V6_FILTER_INIT = 0 x4,
IPA_CMD_IP_V4_ROUTING_INIT = 0 x7,
IPA_CMD_IP_V6_ROUTING_INIT = 0 x8,
IPA_CMD_HDR_INIT_LOCAL = 0 x9,
IPA_CMD_REGISTER_WRITE = 0 xc,
IPA_CMD_IP_PACKET_INIT = 0 x10,
IPA_CMD_DMA_SHARED_MEM = 0 x13,
IPA_CMD_IP_PACKET_TAG_STATUS = 0 x14,
};
/**
* ipa_cmd_table_init_valid ( ) - Validate a memory region holding a table
* @ ipa : - IPA pointer
* @ mem : - IPA memory region descriptor
* @ route : - Whether the region holds a route or filter table
*
* Return : true if region is valid , false otherwise
*/
bool ipa_cmd_table_init_valid(struct ipa *ipa, const struct ipa_mem *mem,
bool route);
/**
* ipa_cmd_pool_init ( ) - initialize command channel pools
* @ channel : AP - > IPA command TX GSI channel pointer
* @ tre_count : Number of pool elements to allocate
*
* Return : 0 if successful , or a negative error code
*/
int ipa_cmd_pool_init(struct gsi_channel *channel, u32 tre_count);
/**
* ipa_cmd_pool_exit ( ) - Inverse of ipa_cmd_pool_init ( )
* @ channel : AP - > IPA command TX GSI channel pointer
*/
void ipa_cmd_pool_exit(struct gsi_channel *channel);
/**
* ipa_cmd_table_init_add ( ) - Add table init command to a transaction
* @ trans : GSI transaction
* @ opcode : IPA immediate command opcode
* @ size : Size of non - hashed routing table memory
* @ offset : Offset in IPA shared memory of non - hashed routing table memory
* @ addr : DMA address of non - hashed table data to write
* @ hash_size : Size of hashed routing table memory
* @ hash_offset : Offset in IPA shared memory of hashed routing table memory
* @ hash_addr : DMA address of hashed table data to write
*
* If hash_size is 0 , hash_offset and hash_addr are ignored .
*/
void ipa_cmd_table_init_add(struct gsi_trans *trans, enum ipa_cmd_opcode opcode,
u16 size, u32 offset, dma_addr_t addr,
u16 hash_size, u32 hash_offset,
dma_addr_t hash_addr);
/**
* ipa_cmd_hdr_init_local_add ( ) - Add a header init command to a transaction
* @ trans : GSI transaction
* @ offset : Offset of header memory in IPA local space
* @ size : Size of header memory
* @ addr : DMA address of buffer to be written from
*
* Defines and fills the location in IPA memory to use for headers .
*/
void ipa_cmd_hdr_init_local_add(struct gsi_trans *trans, u32 offset, u16 size,
dma_addr_t addr);
/**
* ipa_cmd_register_write_add ( ) - Add a register write command to a transaction
* @ trans : GSI transaction
* @ offset : Offset of register to be written
* @ value : Value to be written
* @ mask : Mask of bits in register to update with bits from value
* @ clear_full : Pipeline clear option ; true means full pipeline clear
*/
void ipa_cmd_register_write_add(struct gsi_trans *trans, u32 offset, u32 value,
u32 mask, bool clear_full);
/**
* ipa_cmd_dma_shared_mem_add ( ) - Add a DMA memory command to a transaction
* @ trans : GSI transaction
* @ offset : Offset of IPA memory to be read or written
* @ size : Number of bytes of memory to be transferred
* @ addr : DMA address of buffer to be read into or written from
* @ toward_ipa : true means write to IPA memory ; false means read
*/
void ipa_cmd_dma_shared_mem_add(struct gsi_trans *trans, u32 offset,
u16 size, dma_addr_t addr, bool toward_ipa);
/**
* ipa_cmd_pipeline_clear_add ( ) - Add pipeline clear commands to a transaction
* @ trans : GSI transaction
*/
void ipa_cmd_pipeline_clear_add(struct gsi_trans *trans);
/**
* ipa_cmd_pipeline_clear_count ( ) - # commands required to clear pipeline
*
* Return : The number of elements to allocate in a transaction
* to hold commands to clear the pipeline
*/
u32 ipa_cmd_pipeline_clear_count(void );
/**
* ipa_cmd_pipeline_clear_wait ( ) - Wait pipeline clear to complete
* @ ipa : - IPA pointer
*/
void ipa_cmd_pipeline_clear_wait(struct ipa *ipa);
/**
* ipa_cmd_trans_alloc ( ) - Allocate a transaction for the command TX endpoint
* @ ipa : IPA pointer
* @ tre_count : Number of elements in the transaction
*
* Return : A GSI transaction structure , or a null pointer if all
* available transactions are in use
*/
struct gsi_trans *ipa_cmd_trans_alloc(struct ipa *ipa, u32 tre_count);
/**
* ipa_cmd_init ( ) - Initialize IPA immediate commands
* @ ipa : - IPA pointer
*
* Return : 0 if successful , or a negative error code
*
* There is no need for a matching ipa_cmd_exit ( ) function .
*/
int ipa_cmd_init(struct ipa *ipa);
#endif /* _IPA_CMD_H_ */
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