/* * Copyright 2022 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: AMD * */ /*********************************************************************/ // USB4 DPIA BANDWIDTH ALLOCATION LOGIC /*********************************************************************/ #include "link_dp_dpia_bw.h" #include "link_dpcd.h" #include "dc_dmub_srv.h" #define DC_LOGGER … #define Kbps_TO_Gbps … // ------------------------------------------------------------------ // PRIVATE FUNCTIONS // ------------------------------------------------------------------ /* * Always Check the following: * - Is it USB4 link? * - Is HPD HIGH? * - Is BW Allocation Support Mode enabled on DP-Tx? */ static bool get_bw_alloc_proceed_flag(struct dc_link *tmp) { … } static void reset_bw_alloc_struct(struct dc_link *link) { … } #define BW_GRANULARITY_0 … #define BW_GRANULARITY_1 … #define BW_GRANULARITY_2 … static uint8_t get_bw_granularity(struct dc_link *link) { … } static int get_estimated_bw(struct dc_link *link) { … } static int get_non_reduced_max_link_rate(struct dc_link *link) { … } static int get_non_reduced_max_lane_count(struct dc_link *link) { … } /* * Read all New BW alloc configuration ex: estimated_bw, allocated_bw, * granuality, Driver_ID, CM_Group, & populate the BW allocation structs * for host router and dpia */ static void init_usb4_bw_struct(struct dc_link *link) { … } static uint8_t get_lowest_dpia_index(struct dc_link *link) { … } /* * Get the maximum dp tunnel banwidth of host router * * @dc: pointer to the dc struct instance * @hr_index: host router index * * return: host router maximum dp tunnel bandwidth */ static int get_host_router_total_dp_tunnel_bw(const struct dc *dc, uint8_t hr_index) { … } /* * Cleanup function for when the dpia is unplugged to reset struct * and perform any required clean up * * @link: pointer to the dc_link struct instance * * return: none */ static void dpia_bw_alloc_unplug(struct dc_link *link) { … } static void set_usb4_req_bw_req(struct dc_link *link, int req_bw) { … } /* * Return the response_ready flag from dc_link struct * * @link: pointer to the dc_link struct instance * * return: response_ready flag from dc_link struct */ static bool get_cm_response_ready_flag(struct dc_link *link) { … } // ------------------------------------------------------------------ // PUBLIC FUNCTIONS // ------------------------------------------------------------------ bool link_dp_dpia_set_dptx_usb4_bw_alloc_support(struct dc_link *link) { … } void dpia_handle_bw_alloc_response(struct dc_link *link, uint8_t bw, uint8_t result) { … } int dpia_handle_usb4_bandwidth_allocation_for_link(struct dc_link *link, int peak_bw) { … } bool link_dp_dpia_allocate_usb4_bandwidth_for_stream(struct dc_link *link, int req_bw) { … } bool dpia_validate_usb4_bw(struct dc_link **link, int *bw_needed_per_dpia, const unsigned int num_dpias) { … } int link_dp_dpia_get_dp_overhead_in_dp_tunneling(struct dc_link *link) { … }
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