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/*
* Copyright 2019 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
*
*/
#include "dmub/dmub_srv_stat.h"
#include "dmub/inc/dmub_cmd.h"
/**
* DOC: DMUB_SRV STAT Interface
*
* These interfaces are called without acquiring DAL and DC locks.
* Hence, there is limitations on whese interfaces can access. Only
* variables exclusively defined for these interfaces can be modified.
*/
/**
* dmub_srv_stat_get_notification - Retrieves a dmub outbox notification, set up dmub notification
* structure with message information. Also a pending bit if queue
* is having more notifications
* @dmub: dmub srv structure
* @notify: dmub notification structure to be filled up
*
* Returns: dmub_status
*/
enum dmub_status dmub_srv_stat_get_notification(struct dmub_srv *dmub,
struct dmub_notification *notify)
{
/**
* This function is called without dal and dc locks, so
* we shall not modify any dmub variables, only dmub->outbox1_rb
* is exempted as it is exclusively accessed by this function
*/
union dmub_rb_out_cmd cmd = {0};
if (!dmub->hw_init) {
notify->type = DMUB_NOTIFICATION_NO_DATA;
notify->pending_notification = false;
return DMUB_STATUS_INVALID;
}
/* Get write pointer which is updated by dmub */
dmub->outbox1_rb.wrpt = dmub->hw_funcs.get_outbox1_wptr(dmub);
if (!dmub_rb_out_front(&dmub->outbox1_rb, &cmd)) {
notify->type = DMUB_NOTIFICATION_NO_DATA;
notify->pending_notification = false;
return DMUB_STATUS_OK;
}
switch (cmd.cmd_common.header.type) {
case DMUB_OUT_CMD__DP_AUX_REPLY:
notify->type = DMUB_NOTIFICATION_AUX_REPLY;
notify->link_index = cmd.dp_aux_reply.control.instance;
notify->result = cmd.dp_aux_reply.control.result;
dmub_memcpy((void *)¬ify->aux_reply,
(void *)&cmd.dp_aux_reply.reply_data, sizeof(struct aux_reply_data));
break;
case DMUB_OUT_CMD__DP_HPD_NOTIFY:
if (cmd.dp_hpd_notify.hpd_data.hpd_type == DP_HPD) {
notify->type = DMUB_NOTIFICATION_HPD;
notify->hpd_status = cmd.dp_hpd_notify.hpd_data.hpd_status;
} else {
notify->type = DMUB_NOTIFICATION_HPD_IRQ;
}
notify->link_index = cmd.dp_hpd_notify.hpd_data.instance;
notify->result = AUX_RET_SUCCESS;
break;
case DMUB_OUT_CMD__SET_CONFIG_REPLY:
notify->type = DMUB_NOTIFICATION_SET_CONFIG_REPLY;
notify->link_index = cmd.set_config_reply.set_config_reply_control.instance;
notify->sc_status = cmd.set_config_reply.set_config_reply_control.status;
break;
default:
notify->type = DMUB_NOTIFICATION_NO_DATA;
break;
}
/* Pop outbox1 ringbuffer and update read pointer */
dmub_rb_pop_front(&dmub->outbox1_rb);
dmub->hw_funcs.set_outbox1_rptr(dmub, dmub->outbox1_rb.rptr);
/**
* Notify dc whether dmub has a pending outbox message,
* this is to avoid one more call to dmub_srv_stat_get_notification
*/
if (dmub_rb_empty(&dmub->outbox1_rb))
notify->pending_notification = false;
else
notify->pending_notification = true;
return DMUB_STATUS_OK;
}
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