cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

dmub_hw_lock_mgr.c (2459B)

      1/*
      2 * Copyright 2019 Advanced Micro Devices, Inc.
      3 *
      4 * Permission is hereby granted, free of charge, to any person obtaining a
      5 * copy of this software and associated documentation files (the "Software"),
      6 * to deal in the Software without restriction, including without limitation
      7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8 * and/or sell copies of the Software, and to permit persons to whom the
      9 * Software is furnished to do so, subject to the following conditions:
     10 *
     11 * The above copyright notice and this permission notice shall be included in
     12 * all copies or substantial portions of the Software.
     13 *
     14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     20 * OTHER DEALINGS IN THE SOFTWARE.
     21 *
     22 * Authors: AMD
     23 *
     24 */
     25
     26#include "dmub_hw_lock_mgr.h"
     27#include "dc_dmub_srv.h"
     28#include "dc_types.h"
     29#include "core_types.h"
     30
     31void dmub_hw_lock_mgr_cmd(struct dc_dmub_srv *dmub_srv,
     32				bool lock,
     33				union dmub_hw_lock_flags *hw_locks,
     34				struct dmub_hw_lock_inst_flags *inst_flags)
     35{
     36	union dmub_rb_cmd cmd;
     37
     38	memset(&cmd, 0, sizeof(cmd));
     39	cmd.lock_hw.header.type = DMUB_CMD__HW_LOCK;
     40	cmd.lock_hw.header.sub_type = 0;
     41	cmd.lock_hw.header.payload_bytes = sizeof(struct dmub_cmd_lock_hw_data);
     42	cmd.lock_hw.lock_hw_data.client = HW_LOCK_CLIENT_DRIVER;
     43	cmd.lock_hw.lock_hw_data.lock = lock;
     44	cmd.lock_hw.lock_hw_data.hw_locks.u8All = hw_locks->u8All;
     45	memcpy(&cmd.lock_hw.lock_hw_data.inst_flags, inst_flags, sizeof(struct dmub_hw_lock_inst_flags));
     46
     47	if (!lock)
     48		cmd.lock_hw.lock_hw_data.should_release = 1;
     49
     50	dc_dmub_srv_cmd_queue(dmub_srv, &cmd);
     51	dc_dmub_srv_cmd_execute(dmub_srv);
     52	dc_dmub_srv_wait_idle(dmub_srv);
     53}
     54
     55void dmub_hw_lock_mgr_inbox0_cmd(struct dc_dmub_srv *dmub_srv,
     56		union dmub_inbox0_cmd_lock_hw hw_lock_cmd)
     57{
     58	union dmub_inbox0_data_register data = { 0 };
     59
     60	data.inbox0_cmd_lock_hw = hw_lock_cmd;
     61	dc_dmub_srv_clear_inbox0_ack(dmub_srv);
     62	dc_dmub_srv_send_inbox0_cmd(dmub_srv, data);
     63	dc_dmub_srv_wait_for_inbox0_ack(dmub_srv);
     64}
     65
     66bool should_use_dmub_lock(struct dc_link *link)
     67{
     68	return false;
     69}