/* * Copyright 2021 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 * */ #ifndef DC_INC_LINK_DP_DPIA_BW_H_ #define DC_INC_LINK_DP_DPIA_BW_H_ #include "link.h" /* Number of Host Routers per motherboard is 2 */ #define MAX_HR_NUM … /* Number of DPIA per host router is 2 */ #define MAX_DPIA_NUM … /* * Host Router BW type */ enum bw_type { … }; /* * Enable BW Allocation Mode Support from the DP-Tx side * * @link: pointer to the dc_link struct instance * * return: SUCCESS or FAILURE */ bool link_dp_dpia_set_dptx_usb4_bw_alloc_support(struct dc_link *link); /* * Allocates only what the stream needs for bw, so if: * If (stream_req_bw < or > already_allocated_bw_at_HPD) * => Deallocate Max Bw & then allocate only what the stream needs * * @link: pointer to the dc_link struct instance * @req_bw: Bw requested by the stream * * return: true if allocated successfully */ bool link_dp_dpia_allocate_usb4_bandwidth_for_stream(struct dc_link *link, int req_bw); /* * Handle the USB4 BW Allocation related functionality here: * Plug => Try to allocate max bw from timing parameters supported by the sink * Unplug => de-allocate bw * * @link: pointer to the dc_link struct instance * @peak_bw: Peak bw used by the link/sink * * return: allocated bw else return 0 */ int dpia_handle_usb4_bandwidth_allocation_for_link(struct dc_link *link, int peak_bw); /* * Handle function for when the status of the Request above is complete. * We will find out the result of allocating on CM and update structs. * * @link: pointer to the dc_link struct instance * @bw: Allocated or Estimated BW depending on the result * @result: Response type * * return: none */ void dpia_handle_bw_alloc_response(struct dc_link *link, uint8_t bw, uint8_t result); /* * Handle the validation of total BW here and confirm that the bw used by each * DPIA doesn't exceed available BW for each host router (HR) * * @link[]: array of link pointer to all possible DPIA links * @bw_needed[]: bw needed for each DPIA link based on timing * @num_dpias: Number of DPIAs for the above 2 arrays. Should always be <= MAX_DPIA_NUM * * return: TRUE if bw used by DPIAs doesn't exceed available BW else return FALSE */ bool dpia_validate_usb4_bw(struct dc_link **link, int *bw_needed, const unsigned int num_dpias); /* * Obtain all the DP overheads in dp tunneling for the dpia link * * @link: pointer to the dc_link struct instance * * return: DP overheads in DP tunneling */ int link_dp_dpia_get_dp_overhead_in_dp_tunneling(struct dc_link *link); #endif /* DC_INC_LINK_DP_DPIA_BW_H_ */
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