Line data    Source code

       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/dmub_srv_stat.h"
      27             : #include "dmub/inc/dmub_cmd.h"
      28             : 
      29             : /**
      30             :  * DOC: DMUB_SRV STAT Interface
      31             :  *
      32             :  * These interfaces are called without acquiring DAL and DC locks.
      33             :  * Hence, there is limitations on whese interfaces can access. Only
      34             :  * variables exclusively defined for these interfaces can be modified.
      35             :  */
      36             : 
      37             : /**
      38             :  * dmub_srv_stat_get_notification - Retrieves a dmub outbox notification, set up dmub notification
      39             :  *                                  structure with message information. Also a pending bit if queue
      40             :  *                                  is having more notifications
      41             :  *  @dmub: dmub srv structure
      42             :  *  @notify: dmub notification structure to be filled up
      43             :  *
      44             :  *  Returns: dmub_status
      45             :  */
      46           0 : enum dmub_status dmub_srv_stat_get_notification(struct dmub_srv *dmub,
      47             :                                                 struct dmub_notification *notify)
      48             : {
      49             :         /**
      50             :          * This function is called without dal and dc locks, so
      51             :          * we shall not modify any dmub variables, only dmub->outbox1_rb
      52             :          * is exempted as it is exclusively accessed by this function
      53             :          */
      54           0 :         union dmub_rb_out_cmd cmd = {0};
      55             : 
      56           0 :         if (!dmub->hw_init) {
      57           0 :                 notify->type = DMUB_NOTIFICATION_NO_DATA;
      58           0 :                 notify->pending_notification = false;
      59           0 :                 return DMUB_STATUS_INVALID;
      60             :         }
      61             : 
      62             :         /* Get write pointer which is updated by dmub */
      63           0 :         dmub->outbox1_rb.wrpt = dmub->hw_funcs.get_outbox1_wptr(dmub);
      64             : 
      65           0 :         if (!dmub_rb_out_front(&dmub->outbox1_rb, &cmd)) {
      66           0 :                 notify->type = DMUB_NOTIFICATION_NO_DATA;
      67           0 :                 notify->pending_notification = false;
      68           0 :                 return DMUB_STATUS_OK;
      69             :         }
      70             : 
      71           0 :         switch (cmd.cmd_common.header.type) {
      72             :         case DMUB_OUT_CMD__DP_AUX_REPLY:
      73           0 :                 notify->type = DMUB_NOTIFICATION_AUX_REPLY;
      74           0 :                 notify->link_index = cmd.dp_aux_reply.control.instance;
      75           0 :                 notify->result = cmd.dp_aux_reply.control.result;
      76           0 :                 dmub_memcpy((void *)&notify->aux_reply,
      77             :                         (void *)&cmd.dp_aux_reply.reply_data, sizeof(struct aux_reply_data));
      78           0 :                 break;
      79             :         case DMUB_OUT_CMD__DP_HPD_NOTIFY:
      80           0 :                 if (cmd.dp_hpd_notify.hpd_data.hpd_type == DP_HPD) {
      81           0 :                         notify->type = DMUB_NOTIFICATION_HPD;
      82           0 :                         notify->hpd_status = cmd.dp_hpd_notify.hpd_data.hpd_status;
      83             :                 } else {
      84           0 :                         notify->type = DMUB_NOTIFICATION_HPD_IRQ;
      85             :                 }
      86             : 
      87           0 :                 notify->link_index = cmd.dp_hpd_notify.hpd_data.instance;
      88           0 :                 notify->result = AUX_RET_SUCCESS;
      89           0 :                 break;
      90             :         case DMUB_OUT_CMD__SET_CONFIG_REPLY:
      91           0 :                 notify->type = DMUB_NOTIFICATION_SET_CONFIG_REPLY;
      92           0 :                 notify->link_index = cmd.set_config_reply.set_config_reply_control.instance;
      93           0 :                 notify->sc_status = cmd.set_config_reply.set_config_reply_control.status;
      94           0 :                 break;
      95             :         default:
      96           0 :                 notify->type = DMUB_NOTIFICATION_NO_DATA;
      97           0 :                 break;
      98             :         }
      99             : 
     100             :         /* Pop outbox1 ringbuffer and update read pointer */
     101           0 :         dmub_rb_pop_front(&dmub->outbox1_rb);
     102           0 :         dmub->hw_funcs.set_outbox1_rptr(dmub, dmub->outbox1_rb.rptr);
     103             : 
     104             :         /**
     105             :          * Notify dc whether dmub has a pending outbox message,
     106             :          * this is to avoid one more call to dmub_srv_stat_get_notification
     107             :          */
     108           0 :         if (dmub_rb_empty(&dmub->outbox1_rb))
     109           0 :                 notify->pending_notification = false;
     110             :         else
     111           0 :                 notify->pending_notification = true;
     112             : 
     113             :         return DMUB_STATUS_OK;
     114             : }