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

   1/*
   2 * Copyright 2016-2018 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 "soc15_int.h"
  26#include "kfd_device_queue_manager.h"
  27#include "kfd_smi_events.h"
  28
  29static bool event_interrupt_isr_v9(struct kfd_dev *dev,
  30                                        const uint32_t *ih_ring_entry,
  31                                        uint32_t *patched_ihre,
  32                                        bool *patched_flag)
  33{
  34        uint16_t source_id, client_id, pasid, vmid;
  35        const uint32_t *data = ih_ring_entry;
  36
  37        /* Only handle interrupts from KFD VMIDs */
  38        vmid = SOC15_VMID_FROM_IH_ENTRY(ih_ring_entry);
  39        if (vmid < dev->vm_info.first_vmid_kfd ||
  40            vmid > dev->vm_info.last_vmid_kfd)
  41                return false;
  42
  43        source_id = SOC15_SOURCE_ID_FROM_IH_ENTRY(ih_ring_entry);
  44        client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
  45        pasid = SOC15_PASID_FROM_IH_ENTRY(ih_ring_entry);
  46
  47        /* This is a known issue for gfx9. Under non HWS, pasid is not set
  48         * in the interrupt payload, so we need to find out the pasid on our
  49         * own.
  50         */
  51        if (!pasid && dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
  52                const uint32_t pasid_mask = 0xffff;
  53
  54                *patched_flag = true;
  55                memcpy(patched_ihre, ih_ring_entry,
  56                                dev->device_info->ih_ring_entry_size);
  57
  58                pasid = dev->dqm->vmid_pasid[vmid];
  59
  60                /* Patch the pasid field */
  61                patched_ihre[3] = cpu_to_le32((le32_to_cpu(patched_ihre[3])
  62                                        & ~pasid_mask) | pasid);
  63        }
  64
  65        pr_debug("client id 0x%x, source id %d, vmid %d, pasid 0x%x. raw data:\n",
  66                 client_id, source_id, vmid, pasid);
  67        pr_debug("%8X, %8X, %8X, %8X, %8X, %8X, %8X, %8X.\n",
  68                 data[0], data[1], data[2], data[3],
  69                 data[4], data[5], data[6], data[7]);
  70
  71        /* If there is no valid PASID, it's likely a bug */
  72        if (WARN_ONCE(pasid == 0, "Bug: No PASID in KFD interrupt"))
  73                return false;
  74
  75        /* Interrupt types we care about: various signals and faults.
  76         * They will be forwarded to a work queue (see below).
  77         */
  78        return source_id == SOC15_INTSRC_CP_END_OF_PIPE ||
  79                source_id == SOC15_INTSRC_SDMA_TRAP ||
  80                source_id == SOC15_INTSRC_SQ_INTERRUPT_MSG ||
  81                source_id == SOC15_INTSRC_CP_BAD_OPCODE ||
  82                client_id == SOC15_IH_CLIENTID_VMC ||
  83                client_id == SOC15_IH_CLIENTID_VMC1 ||
  84                client_id == SOC15_IH_CLIENTID_UTCL2;
  85}
  86
  87static void event_interrupt_wq_v9(struct kfd_dev *dev,
  88                                        const uint32_t *ih_ring_entry)
  89{
  90        uint16_t source_id, client_id, pasid, vmid;
  91        uint32_t context_id;
  92
  93        source_id = SOC15_SOURCE_ID_FROM_IH_ENTRY(ih_ring_entry);
  94        client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
  95        pasid = SOC15_PASID_FROM_IH_ENTRY(ih_ring_entry);
  96        vmid = SOC15_VMID_FROM_IH_ENTRY(ih_ring_entry);
  97        context_id = SOC15_CONTEXT_ID0_FROM_IH_ENTRY(ih_ring_entry);
  98
  99        if (source_id == SOC15_INTSRC_CP_END_OF_PIPE)
 100                kfd_signal_event_interrupt(pasid, context_id, 32);
 101        else if (source_id == SOC15_INTSRC_SDMA_TRAP)
 102                kfd_signal_event_interrupt(pasid, context_id & 0xfffffff, 28);
 103        else if (source_id == SOC15_INTSRC_SQ_INTERRUPT_MSG)
 104                kfd_signal_event_interrupt(pasid, context_id & 0xffffff, 24);
 105        else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE)
 106                kfd_signal_hw_exception_event(pasid);
 107        else if (client_id == SOC15_IH_CLIENTID_VMC ||
 108                client_id == SOC15_IH_CLIENTID_VMC1 ||
 109                 client_id == SOC15_IH_CLIENTID_UTCL2) {
 110                struct kfd_vm_fault_info info = {0};
 111                uint16_t ring_id = SOC15_RING_ID_FROM_IH_ENTRY(ih_ring_entry);
 112
 113                info.vmid = vmid;
 114                info.mc_id = client_id;
 115                info.page_addr = ih_ring_entry[4] |
 116                        (uint64_t)(ih_ring_entry[5] & 0xf) << 32;
 117                info.prot_valid = ring_id & 0x08;
 118                info.prot_read  = ring_id & 0x10;
 119                info.prot_write = ring_id & 0x20;
 120
 121                kfd_smi_event_update_vmfault(dev, pasid);
 122                kfd_process_vm_fault(dev->dqm, pasid);
 123                kfd_signal_vm_fault_event(dev, pasid, &info);
 124        }
 125}
 126
 127const struct kfd_event_interrupt_class event_interrupt_class_v9 = {
 128        .interrupt_isr = event_interrupt_isr_v9,
 129        .interrupt_wq = event_interrupt_wq_v9,
 130};
 131