drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c

   1 /*
   2  * Copyright 2014 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
  23 #include "kfd_priv.h"
  24 #include "kfd_events.h"
  25 #include "cik_int.h"
  26
  27 static bool cik_event_interrupt_isr(struct kfd_dev *dev,
  28                                         const uint32_t *ih_ring_entry)
  29 {
  30         unsigned int pasid;
  31         const struct cik_ih_ring_entry *ihre =
  32                         (const struct cik_ih_ring_entry *)ih_ring_entry;
  33
  34         pasid = (ihre->ring_id & 0xffff0000) >> 16;
  35
  36         /* Do not process in ISR, just request it to be forwarded to WQ. */
  37         return (pasid != 0) &&
  38                 (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
  39                 ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG);
  40 }
  41
  42 static void cik_event_interrupt_wq(struct kfd_dev *dev,
  43                                         const uint32_t *ih_ring_entry)
  44 {
  45         unsigned int pasid;
  46         const struct cik_ih_ring_entry *ihre =
  47                         (const struct cik_ih_ring_entry *)ih_ring_entry;
  48
  49         pasid = (ihre->ring_id & 0xffff0000) >> 16;
  50
  51         if (pasid == 0)
  52                 return;
  53
  54         if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
  55                 kfd_signal_event_interrupt(pasid, 0, 0);
  56         else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
  57                 kfd_signal_event_interrupt(pasid, ihre->data & 0xFF, 8);
  58 }
  59
  60 const struct kfd_event_interrupt_class event_interrupt_class_cik = {
  61         .interrupt_isr = cik_event_interrupt_isr,
  62         .interrupt_wq = cik_event_interrupt_wq,
  63 };