root/drivers/gpu/drm/amd/amdkfd/kfd_int_process_v9.c

DEFINITIONS

1. event_interrupt_isr_v9
2. event_interrupt_wq_v9

   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 
  28 static bool event_interrupt_isr_v9(struct kfd_dev *dev,
  29                                         const uint32_t *ih_ring_entry,
  30                                         uint32_t *patched_ihre,
  31                                         bool *patched_flag)
  32 {
  33         uint16_t source_id, client_id, pasid, vmid;
  34         const uint32_t *data = ih_ring_entry;
  35 
  36         /* Only handle interrupts from KFD VMIDs */
  37         vmid = SOC15_VMID_FROM_IH_ENTRY(ih_ring_entry);
  38         if (vmid < dev->vm_info.first_vmid_kfd ||
  39             vmid > dev->vm_info.last_vmid_kfd)
  40                 return 0;
  41 
  42         source_id = SOC15_SOURCE_ID_FROM_IH_ENTRY(ih_ring_entry);
  43         client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
  44         pasid = SOC15_PASID_FROM_IH_ENTRY(ih_ring_entry);
  45 
  46         /* This is a known issue for gfx9. Under non HWS, pasid is not set
  47          * in the interrupt payload, so we need to find out the pasid on our
  48          * own.
  49          */
  50         if (!pasid && dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
  51                 const uint32_t pasid_mask = 0xffff;
  52 
  53                 *patched_flag = true;
  54                 memcpy(patched_ihre, ih_ring_entry,
  55                                 dev->device_info->ih_ring_entry_size);
  56 
  57                 pasid = dev->kfd2kgd->get_atc_vmid_pasid_mapping_pasid(
  58                                 dev->kgd, 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 0;
  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 
  87 static 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_process_vm_fault(dev->dqm, pasid);
 122                 kfd_signal_vm_fault_event(dev, pasid, &info);
 123         }
 124 }
 125 
 126 const struct kfd_event_interrupt_class event_interrupt_class_v9 = {
 127         .interrupt_isr = event_interrupt_isr_v9,
 128         .interrupt_wq = event_interrupt_wq_v9,
 129 };