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Diffstat (limited to 'drivers/net/ipa/ipa_data.h')
| -rw-r--r-- | drivers/net/ipa/ipa_data.h | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h new file mode 100644 index 000000000..e5a6ce75c --- /dev/null +++ b/drivers/net/ipa/ipa_data.h @@ -0,0 +1,250 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. + * Copyright (C) 2019-2022 Linaro Ltd. + */ +#ifndef _IPA_DATA_H_ +#define _IPA_DATA_H_ + +#include <linux/types.h> + +#include "ipa_version.h" +#include "ipa_endpoint.h" +#include "ipa_mem.h" + +/** + * DOC: IPA/GSI Configuration Data + * + * Boot-time configuration data is used to define the configuration of the + * IPA and GSI resources to use for a given platform. This data is supplied + * via the Device Tree match table, associated with a particular compatible + * string. The data defines information about how resources, endpoints and + * channels, memory, power and so on are allocated and used for the + * platform. + * + * Resources are data structures used internally by the IPA hardware. The + * configuration data defines the number (or limits of the number) of various + * types of these resources. + * + * Endpoint configuration data defines properties of both IPA endpoints and + * GSI channels. A channel is a GSI construct, and represents a single + * communication path between the IPA and a particular execution environment + * (EE), such as the AP or Modem. Each EE has a set of channels associated + * with it, and each channel has an ID unique for that EE. For the most part + * the only GSI channels of concern to this driver belong to the AP. + * + * An endpoint is an IPA construct representing a single channel anywhere + * in the system. An IPA endpoint ID maps directly to an (EE, channel_id) + * pair. Generally, this driver is concerned with only endpoints associated + * with the AP, however this will change when support for routing (etc.) is + * added. IPA endpoint and GSI channel configuration data are defined + * together, establishing the endpoint_id->(EE, channel_id) mapping. + * + * Endpoint configuration data consists of three parts: properties that + * are common to IPA and GSI (EE ID, channel ID, endpoint ID, and direction); + * properties associated with the GSI channel; and properties associated with + * the IPA endpoint. + */ + +/* The maximum possible number of source or destination resource groups */ +#define IPA_RESOURCE_GROUP_MAX 8 + +/** enum ipa_qsb_master_id - array index for IPA QSB configuration data */ +enum ipa_qsb_master_id { + IPA_QSB_MASTER_DDR, + IPA_QSB_MASTER_PCIE, +}; + +/** + * struct ipa_qsb_data - Qualcomm System Bus configuration data + * @max_writes: Maximum outstanding write requests for this master + * @max_reads: Maximum outstanding read requests for this master + * @max_reads_beats: Max outstanding read bytes in 8-byte "beats" (if non-zero) + */ +struct ipa_qsb_data { + u8 max_writes; + u8 max_reads; + u8 max_reads_beats; /* Not present for IPA v3.5.1 */ +}; + +/** + * struct gsi_channel_data - GSI channel configuration data + * @tre_count: number of TREs in the channel ring + * @event_count: number of slots in the associated event ring + * @tlv_count: number of entries in channel's TLV FIFO + * + * A GSI channel is a unidirectional means of transferring data to or + * from (and through) the IPA. A GSI channel has a ring buffer made + * up of "transfer ring elements" (TREs) that specify individual data + * transfers or IPA immediate commands. TREs are filled by the AP, + * and control is passed to IPA hardware by writing the last written + * element into a doorbell register. + * + * When data transfer commands have completed the GSI generates an + * event (a structure of data) and optionally signals the AP with + * an interrupt. Event structures are implemented by another ring + * buffer, directed toward the AP from the IPA. + * + * The input to a GSI channel is a FIFO of type/length/value (TLV) + * elements, and the size of this FIFO limits the number of TREs + * that can be included in a single transaction. + */ +struct gsi_channel_data { + u16 tre_count; /* must be a power of 2 */ + u16 event_count; /* must be a power of 2 */ + u8 tlv_count; +}; + +/** + * struct ipa_endpoint_data - IPA endpoint configuration data + * @filter_support: whether endpoint supports filtering + * @config: hardware configuration + * + * Not all endpoints support the IPA filtering capability. A filter table + * defines the filters to apply for those endpoints that support it. The + * AP is responsible for initializing this table, and it must include entries + * for non-AP endpoints. For this reason we define *all* endpoints used + * in the system, and indicate whether they support filtering. + * + * The remaining endpoint configuration data specifies default hardware + * configuration values that apply only to AP endpoints. + */ +struct ipa_endpoint_data { + bool filter_support; + struct ipa_endpoint_config config; +}; + +/** + * struct ipa_gsi_endpoint_data - GSI channel/IPA endpoint data + * @ee_id: GSI execution environment ID + * @channel_id: GSI channel ID + * @endpoint_id: IPA endpoint ID + * @toward_ipa: direction of data transfer + * @channel: GSI channel configuration data (see above) + * @endpoint: IPA endpoint configuration data (see above) + */ +struct ipa_gsi_endpoint_data { + u8 ee_id; /* enum gsi_ee_id */ + u8 channel_id; + u8 endpoint_id; + bool toward_ipa; + + struct gsi_channel_data channel; + struct ipa_endpoint_data endpoint; +}; + +/** + * struct ipa_resource_limits - minimum and maximum resource counts + * @min: minimum number of resources of a given type + * @max: maximum number of resources of a given type + */ +struct ipa_resource_limits { + u32 min; + u32 max; +}; + +/** + * struct ipa_resource - resource group source or destination resource usage + * @limits: array of resource limits, indexed by group + */ +struct ipa_resource { + struct ipa_resource_limits limits[IPA_RESOURCE_GROUP_MAX]; +}; + +/** + * struct ipa_resource_data - IPA resource configuration data + * @rsrc_group_src_count: number of source resource groups supported + * @rsrc_group_dst_count: number of destination resource groups supported + * @resource_src_count: number of entries in the resource_src array + * @resource_src: source endpoint group resources + * @resource_dst_count: number of entries in the resource_dst array + * @resource_dst: destination endpoint group resources + * + * In order to manage quality of service between endpoints, certain resources + * required for operation are allocated to groups of endpoints. Generally + * this information is invisible to the AP, but the AP is responsible for + * programming it at initialization time, so we specify it here. + */ +struct ipa_resource_data { + u32 rsrc_group_src_count; + u32 rsrc_group_dst_count; + u32 resource_src_count; + const struct ipa_resource *resource_src; + u32 resource_dst_count; + const struct ipa_resource *resource_dst; +}; + +/** + * struct ipa_mem_data - description of IPA memory regions + * @local_count: number of regions defined in the local[] array + * @local: array of IPA-local memory region descriptors + * @imem_addr: physical address of IPA region within IMEM + * @imem_size: size in bytes of IPA IMEM region + * @smem_id: item identifier for IPA region within SMEM memory + * @smem_size: size in bytes of the IPA SMEM region + */ +struct ipa_mem_data { + u32 local_count; + const struct ipa_mem *local; + u32 imem_addr; + u32 imem_size; + u32 smem_id; + u32 smem_size; +}; + +/** + * struct ipa_interconnect_data - description of IPA interconnect bandwidths + * @name: Interconnect name (matches interconnect-name in DT) + * @peak_bandwidth: Peak interconnect bandwidth (in 1000 byte/sec units) + * @average_bandwidth: Average interconnect bandwidth (in 1000 byte/sec units) + */ +struct ipa_interconnect_data { + const char *name; + u32 peak_bandwidth; + u32 average_bandwidth; +}; + +/** + * struct ipa_power_data - description of IPA power configuration data + * @core_clock_rate: Core clock rate (Hz) + * @interconnect_count: Number of entries in the interconnect_data array + * @interconnect_data: IPA interconnect configuration data + */ +struct ipa_power_data { + u32 core_clock_rate; + u32 interconnect_count; /* # entries in interconnect_data[] */ + const struct ipa_interconnect_data *interconnect_data; +}; + +/** + * struct ipa_data - combined IPA/GSI configuration data + * @version: IPA hardware version + * @backward_compat: BCR register value (prior to IPA v4.5 only) + * @qsb_count: number of entries in the qsb_data array + * @qsb_data: Qualcomm System Bus configuration data + * @endpoint_count: number of entries in the endpoint_data array + * @endpoint_data: IPA endpoint/GSI channel data + * @resource_data: IPA resource configuration data + * @mem_data: IPA memory region data + * @power_data: IPA power data + */ +struct ipa_data { + enum ipa_version version; + u32 backward_compat; + u32 qsb_count; /* number of entries in qsb_data[] */ + const struct ipa_qsb_data *qsb_data; + u32 endpoint_count; /* number of entries in endpoint_data[] */ + const struct ipa_gsi_endpoint_data *endpoint_data; + const struct ipa_resource_data *resource_data; + const struct ipa_mem_data *mem_data; + const struct ipa_power_data *power_data; +}; + +extern const struct ipa_data ipa_data_v3_1; +extern const struct ipa_data ipa_data_v3_5_1; +extern const struct ipa_data ipa_data_v4_2; +extern const struct ipa_data ipa_data_v4_5; +extern const struct ipa_data ipa_data_v4_9; +extern const struct ipa_data ipa_data_v4_11; + +#endif /* _IPA_DATA_H_ */ |