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_DATA_H_ 7 #define _IPA_DATA_H_ 8 9 #include <linux/types.h> 10 11 #include "ipa_version.h" 12 #include "ipa_endpoint.h" 13 #include "ipa_mem.h" 14 15 /** 16 * DOC: IPA/GSI Configuration Data 17 * 18 * Boot-time configuration data is used to define the configuration of the 19 * IPA and GSI resources to use for a given platform. This data is supplied 20 * via the Device Tree match table, associated with a particular compatible 21 * string. The data defines information about resources, endpoints, and 22 * channels. 23 * 24 * Resources are data structures used internally by the IPA hardware. The 25 * configuration data defines the number (or limits of the number) of various 26 * types of these resources. 27 * 28 * Endpoint configuration data defines properties of both IPA endpoints and 29 * GSI channels. A channel is a GSI construct, and represents a single 30 * communication path between the IPA and a particular execution environment 31 * (EE), such as the AP or Modem. Each EE has a set of channels associated 32 * with it, and each channel has an ID unique for that EE. For the most part 33 * the only GSI channels of concern to this driver belong to the AP 34 * 35 * An endpoint is an IPA construct representing a single channel anywhere 36 * in the system. An IPA endpoint ID maps directly to an (EE, channel_id) 37 * pair. Generally, this driver is concerned with only endpoints associated 38 * with the AP, however this will change when support for routing (etc.) is 39 * added. IPA endpoint and GSI channel configuration data are defined 40 * together, establishing the endpoint_id->(EE, channel_id) mapping. 41 * 42 * Endpoint configuration data consists of three parts: properties that 43 * are common to IPA and GSI (EE ID, channel ID, endpoint ID, and direction); 44 * properties associated with the GSI channel; and properties associated with 45 * the IPA endpoint. 46 */ 47 48 /* The maximum value returned by ipa_resource_group_count() */ 49 #define IPA_RESOURCE_GROUP_COUNT 4 50 51 /** enum ipa_resource_type_src - source resource types */ 52 /** 53 * struct gsi_channel_data - GSI channel configuration data 54 * @tre_count: number of TREs in the channel ring 55 * @event_count: number of slots in the associated event ring 56 * @tlv_count: number of entries in channel's TLV FIFO 57 * 58 * A GSI channel is a unidirectional means of transferring data to or 59 * from (and through) the IPA. A GSI channel has a ring buffer made 60 * up of "transfer elements" (TREs) that specify individual data transfers 61 * or IPA immediate commands. TREs are filled by the AP, and control 62 * is passed to IPA hardware by writing the last written element 63 * into a doorbell register. 64 * 65 * When data transfer commands have completed the GSI generates an 66 * event (a structure of data) and optionally signals the AP with 67 * an interrupt. Event structures are implemented by another ring 68 * buffer, directed toward the AP from the IPA. 69 * 70 * The input to a GSI channel is a FIFO of type/length/value (TLV) 71 * elements, and the size of this FIFO limits the number of TREs 72 * that can be included in a single transaction. 73 */ 74 struct gsi_channel_data { 75 u16 tre_count; 76 u16 event_count; 77 u8 tlv_count; 78 }; 79 80 /** 81 * struct ipa_endpoint_tx_data - configuration data for TX endpoints 82 * @status_endpoint: endpoint to which status elements are sent 83 * @delay: whether endpoint starts in delay mode 84 * 85 * Delay mode prevents a TX endpoint from transmitting anything, even if 86 * commands have been presented to the hardware. Once the endpoint exits 87 * delay mode, queued transfer commands are sent. 88 * 89 * The @status_endpoint is only valid if the endpoint's @status_enable 90 * flag is set. 91 */ 92 struct ipa_endpoint_tx_data { 93 enum ipa_endpoint_name status_endpoint; 94 bool delay; 95 }; 96 97 /** 98 * struct ipa_endpoint_rx_data - configuration data for RX endpoints 99 * @pad_align: power-of-2 boundary to which packet payload is aligned 100 * @aggr_close_eof: whether aggregation closes on end-of-frame 101 * 102 * With each packet it transfers, the IPA hardware can perform certain 103 * transformations of its packet data. One of these is adding pad bytes 104 * to the end of the packet data so the result ends on a power-of-2 boundary. 105 * 106 * It is also able to aggregate multiple packets into a single receive buffer. 107 * Aggregation is "open" while a buffer is being filled, and "closes" when 108 * certain criteria are met. One of those criteria is the sender indicating 109 * a "frame" consisting of several transfers has ended. 110 */ 111 struct ipa_endpoint_rx_data { 112 u32 pad_align; 113 bool aggr_close_eof; 114 }; 115 116 /** 117 * struct ipa_endpoint_config_data - IPA endpoint hardware configuration 118 * @checksum: whether checksum offload is enabled 119 * @qmap: whether endpoint uses QMAP protocol 120 * @aggregation: whether endpoint supports aggregation 121 * @status_enable: whether endpoint uses status elements 122 * @dma_mode: whether endpoint operates in DMA mode 123 * @dma_endpoint: peer endpoint, if operating in DMA mode 124 * @tx: TX-specific endpoint information (see above) 125 * @rx: RX-specific endpoint information (see above) 126 */ 127 struct ipa_endpoint_config_data { 128 bool checksum; 129 bool qmap; 130 bool aggregation; 131 bool status_enable; 132 bool dma_mode; 133 enum ipa_endpoint_name dma_endpoint; 134 union { 135 struct ipa_endpoint_tx_data tx; 136 struct ipa_endpoint_rx_data rx; 137 }; 138 }; 139 140 /** 141 * struct ipa_endpoint_data - IPA endpoint configuration data 142 * @filter_support: whether endpoint supports filtering 143 * @seq_type: hardware sequencer type used for endpoint 144 * @config: hardware configuration (see above) 145 * 146 * Not all endpoints support the IPA filtering capability. A filter table 147 * defines the filters to apply for those endpoints that support it. The 148 * AP is responsible for initializing this table, and it must include entries 149 * for non-AP endpoints. For this reason we define *all* endpoints used 150 * in the system, and indicate whether they support filtering. 151 * 152 * The remaining endpoint configuration data applies only to AP endpoints. 153 * The IPA hardware is implemented by sequencers, and the AP must program 154 * the type(s) of these sequencers at initialization time. The remaining 155 * endpoint configuration data is defined above. 156 */ 157 struct ipa_endpoint_data { 158 bool filter_support; 159 /* The next two are specified only for AP endpoints */ 160 enum ipa_seq_type seq_type; 161 struct ipa_endpoint_config_data config; 162 }; 163 164 /** 165 * struct ipa_gsi_endpoint_data - GSI channel/IPA endpoint data 166 * ee: GSI execution environment ID 167 * channel_id: GSI channel ID 168 * endpoint_id: IPA endpoint ID 169 * toward_ipa: direction of data transfer 170 * gsi: GSI channel configuration data (see above) 171 * ipa: IPA endpoint configuration data (see above) 172 */ 173 struct ipa_gsi_endpoint_data { 174 u8 ee_id; /* enum gsi_ee_id */ 175 u8 channel_id; 176 u8 endpoint_id; 177 bool toward_ipa; 178 179 struct gsi_channel_data channel; 180 struct ipa_endpoint_data endpoint; 181 }; 182 183 /** enum ipa_resource_type_src - source resource types */ 184 enum ipa_resource_type_src { 185 IPA_RESOURCE_TYPE_SRC_PKT_CONTEXTS, 186 IPA_RESOURCE_TYPE_SRC_DESCRIPTOR_LISTS, 187 IPA_RESOURCE_TYPE_SRC_DESCRIPTOR_BUFF, 188 IPA_RESOURCE_TYPE_SRC_HPS_DMARS, 189 IPA_RESOURCE_TYPE_SRC_ACK_ENTRIES, 190 }; 191 192 /** enum ipa_resource_type_dst - destination resource types */ 193 enum ipa_resource_type_dst { 194 IPA_RESOURCE_TYPE_DST_DATA_SECTORS, 195 IPA_RESOURCE_TYPE_DST_DPS_DMARS, 196 }; 197 198 /** 199 * struct ipa_resource_limits - minimum and maximum resource counts 200 * @min: minimum number of resources of a given type 201 * @max: maximum number of resources of a given type 202 */ 203 struct ipa_resource_limits { 204 u32 min; 205 u32 max; 206 }; 207 208 /** 209 * struct ipa_resource_src - source endpoint group resource usage 210 * @type: source group resource type 211 * @limits: array of limits to use for each resource group 212 */ 213 struct ipa_resource_src { 214 enum ipa_resource_type_src type; 215 struct ipa_resource_limits limits[IPA_RESOURCE_GROUP_COUNT]; 216 }; 217 218 /** 219 * struct ipa_resource_dst - destination endpoint group resource usage 220 * @type: destination group resource type 221 * @limits: array of limits to use for each resource group 222 */ 223 struct ipa_resource_dst { 224 enum ipa_resource_type_dst type; 225 struct ipa_resource_limits limits[IPA_RESOURCE_GROUP_COUNT]; 226 }; 227 228 /** 229 * struct ipa_resource_data - IPA resource configuration data 230 * @resource_src_count: number of entries in the resource_src array 231 * @resource_src: source endpoint group resources 232 * @resource_dst_count: number of entries in the resource_dst array 233 * @resource_dst: destination endpoint group resources 234 * 235 * In order to manage quality of service between endpoints, certain resources 236 * required for operation are allocated to groups of endpoints. Generally 237 * this information is invisible to the AP, but the AP is responsible for 238 * programming it at initialization time, so we specify it here. 239 */ 240 struct ipa_resource_data { 241 u32 resource_src_count; 242 const struct ipa_resource_src *resource_src; 243 u32 resource_dst_count; 244 const struct ipa_resource_dst *resource_dst; 245 }; 246 247 /** 248 * struct ipa_mem - IPA-local memory region description 249 * @offset: offset in IPA memory space to base of the region 250 * @size: size in bytes base of the region 251 * @canary_count: number of 32-bit "canary" values that precede region 252 */ 253 struct ipa_mem_data { 254 u32 offset; 255 u16 size; 256 u16 canary_count; 257 }; 258 259 /** 260 * struct ipa_data - combined IPA/GSI configuration data 261 * @version: IPA hardware version 262 * @endpoint_count: number of entries in endpoint_data array 263 * @endpoint_data: IPA endpoint/GSI channel data 264 * @resource_data: IPA resource configuration data 265 * @mem_count: number of entries in mem_data array 266 * @mem_data: IPA-local shared memory region data 267 */ 268 struct ipa_data { 269 enum ipa_version version; 270 u32 endpoint_count; /* # entries in endpoint_data[] */ 271 const struct ipa_gsi_endpoint_data *endpoint_data; 272 const struct ipa_resource_data *resource_data; 273 u32 mem_count; /* # entries in mem_data[] */ 274 const struct ipa_mem *mem_data; 275 }; 276 277 extern const struct ipa_data ipa_data_sdm845; 278 extern const struct ipa_data ipa_data_sc7180; 279 280 #endif /* _IPA_DATA_H_ */ 281