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