LXR linux/drivers/gpu/drm/amd/amdkfd/cik_event

   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
  27static 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                ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE);
  41}
  42
  43static void cik_event_interrupt_wq(struct kfd_dev *dev,
  44                                        const uint32_t *ih_ring_entry)
  45{
  46        unsigned int pasid;
  47        const struct cik_ih_ring_entry *ihre =
  48                        (const struct cik_ih_ring_entry *)ih_ring_entry;
  49
  50        pasid = (ihre->ring_id & 0xffff0000) >> 16;
  51
  52        if (pasid == 0)
  53                return;
  54
  55        if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
  56                kfd_signal_event_interrupt(pasid, 0, 0);
  57        else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
  58                kfd_signal_event_interrupt(pasid, ihre->data & 0xFF, 8);
  59        else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
  60                kfd_signal_hw_exception_event(pasid);
  61}
  62
  63const struct kfd_event_interrupt_class event_interrupt_class_cik = {
  64        .interrupt_isr = cik_event_interrupt_isr,
  65        .interrupt_wq = cik_event_interrupt_wq,
  66};
  67