/* * 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 *
*/
/** * 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};
/* 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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