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#include "amdgpu_amdkfd.h"
  27
  28static bool cik_event_interrupt_isr(struct kfd_dev *dev,
  29                                        const uint32_t *ih_ring_entry,
  30                                        uint32_t *patched_ihre,
  31                                        bool *patched_flag)
  32{
  33        const struct cik_ih_ring_entry *ihre =
  34                        (const struct cik_ih_ring_entry *)ih_ring_entry;
  35        const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
  36        unsigned int vmid, pasid;
  37
  38        /* This workaround is due to HW/FW limitation on Hawaii that
  39         * VMID and PASID are not written into ih_ring_entry
  40         */
  41        if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
  42                ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
  43                dev->device_info->asic_family == CHIP_HAWAII) {
  44                struct cik_ih_ring_entry *tmp_ihre =
  45                        (struct cik_ih_ring_entry *)patched_ihre;
  46
  47                *patched_flag = true;
  48                *tmp_ihre = *ihre;
  49
  50                vmid = f2g->read_vmid_from_vmfault_reg(dev->kgd);
  51                pasid = f2g->get_atc_vmid_pasid_mapping_pasid(dev->kgd, vmid);
  52
  53                tmp_ihre->ring_id &= 0x000000ff;
  54                tmp_ihre->ring_id |= vmid << 8;
  55                tmp_ihre->ring_id |= pasid << 16;
  56
  57                return (pasid != 0) &&
  58                        vmid >= dev->vm_info.first_vmid_kfd &&
  59                        vmid <= dev->vm_info.last_vmid_kfd;
  60        }
  61
  62        /* Only handle interrupts from KFD VMIDs */
  63        vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
  64        if (vmid < dev->vm_info.first_vmid_kfd ||
  65            vmid > dev->vm_info.last_vmid_kfd)
  66                return 0;
  67
  68        /* If there is no valid PASID, it's likely a firmware bug */
  69        pasid = (ihre->ring_id & 0xffff0000) >> 16;
  70        if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
  71                return 0;
  72
  73        /* Interrupt types we care about: various signals and faults.
  74         * They will be forwarded to a work queue (see below).
  75         */
  76        return ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
  77                ihre->source_id == CIK_INTSRC_SDMA_TRAP ||
  78                ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG ||
  79                ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE ||
  80                ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
  81                ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT;
  82}
  83
  84static void cik_event_interrupt_wq(struct kfd_dev *dev,
  85                                        const uint32_t *ih_ring_entry)
  86{
  87        const struct cik_ih_ring_entry *ihre =
  88                        (const struct cik_ih_ring_entry *)ih_ring_entry;
  89        uint32_t context_id = ihre->data & 0xfffffff;
  90        unsigned int vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
  91        unsigned int pasid = (ihre->ring_id & 0xffff0000) >> 16;
  92
  93        if (pasid == 0)
  94                return;
  95
  96        if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
  97                kfd_signal_event_interrupt(pasid, context_id, 28);
  98        else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
  99                kfd_signal_event_interrupt(pasid, context_id, 28);
 100        else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
 101                kfd_signal_event_interrupt(pasid, context_id & 0xff, 8);
 102        else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
 103                kfd_signal_hw_exception_event(pasid);
 104        else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
 105                ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
 106                struct kfd_vm_fault_info info;
 107
 108                kfd_process_vm_fault(dev->dqm, pasid);
 109
 110                memset(&info, 0, sizeof(info));
 111                amdgpu_amdkfd_gpuvm_get_vm_fault_info(dev->kgd, &info);
 112                if (!info.page_addr && !info.status)
 113                        return;
 114
 115                if (info.vmid == vmid)
 116                        kfd_signal_vm_fault_event(dev, pasid, &info);
 117                else
 118                        kfd_signal_vm_fault_event(dev, pasid, NULL);
 119        }
 120}
 121
 122const struct kfd_event_interrupt_class event_interrupt_class_cik = {
 123        .interrupt_isr = cik_event_interrupt_isr,
 124        .interrupt_wq = cik_event_interrupt_wq,
 125};
 126