drivers/net/ipa/ipa_cmd.h

   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_ */