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#include "kfd_smi_events.h"
28
29static bool cik_event_interrupt_isr(struct kfd_node *dev,
30 const uint32_t *ih_ring_entry,
31 uint32_t *patched_ihre,
32 bool *patched_flag)
33{
34 const struct cik_ih_ring_entry *ihre =
35 (const struct cik_ih_ring_entry *)ih_ring_entry;
36 const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
37 unsigned int vmid;
38 uint16_t pasid;
39 bool ret;
40
41 /* This workaround is due to HW/FW limitation on Hawaii that
42 * VMID and PASID are not written into ih_ring_entry
43 */
44 if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
45 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
46 dev->adev->asic_type == CHIP_HAWAII) {
47 struct cik_ih_ring_entry *tmp_ihre =
48 (struct cik_ih_ring_entry *)patched_ihre;
49
50 *patched_flag = true;
51 *tmp_ihre = *ihre;
52
53 vmid = f2g->read_vmid_from_vmfault_reg(dev->adev);
54 ret = f2g->get_atc_vmid_pasid_mapping_info(dev->adev, vmid, &pasid);
55
56 tmp_ihre->ring_id &= 0x000000ff;
57 tmp_ihre->ring_id |= vmid << 8;
58 tmp_ihre->ring_id |= pasid << 16;
59
60 return ret && (pasid != 0) &&
61 vmid >= dev->vm_info.first_vmid_kfd &&
62 vmid <= dev->vm_info.last_vmid_kfd;
63 }
64
65 /* Only handle interrupts from KFD VMIDs */
66 vmid = (ihre->ring_id & 0x0000ff00) >> 8;
67 if (vmid < dev->vm_info.first_vmid_kfd ||
68 vmid > dev->vm_info.last_vmid_kfd)
69 return false;
70
71 /* If there is no valid PASID, it's likely a firmware bug */
72 pasid = (ihre->ring_id & 0xffff0000) >> 16;
73 if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
74 return false;
75
76 /* Interrupt types we care about: various signals and faults.
77 * They will be forwarded to a work queue (see below).
78 */
79 return ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
80 ihre->source_id == CIK_INTSRC_SDMA_TRAP ||
81 ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG ||
82 ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE ||
83 ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
84 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
85 !amdgpu_no_queue_eviction_on_vm_fault);
86}
87
88static void cik_event_interrupt_wq(struct kfd_node *dev,
89 const uint32_t *ih_ring_entry)
90{
91 const struct cik_ih_ring_entry *ihre =
92 (const struct cik_ih_ring_entry *)ih_ring_entry;
93 uint32_t context_id = ihre->data & 0xfffffff;
94 u32 pasid = (ihre->ring_id & 0xffff0000) >> 16;
95
96 if (pasid == 0)
97 return;
98
99 if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
100 kfd_signal_event_interrupt(pasid, partial_id: context_id, valid_id_bits: 28);
101 else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
102 kfd_signal_event_interrupt(pasid, partial_id: context_id, valid_id_bits: 28);
103 else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
104 kfd_signal_event_interrupt(pasid, partial_id: context_id & 0xff, valid_id_bits: 8);
105 else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
106 kfd_signal_hw_exception_event(pasid);
107 else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
108 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
109 struct kfd_process_device *pdd = NULL;
110 struct kfd_vm_fault_info info;
111 struct kfd_process *p;
112
113 kfd_smi_event_update_vmfault(dev, pasid);
114 p = kfd_lookup_process_by_pasid(pasid, pdd: &pdd);
115 if (!pdd)
116 return;
117
118 kfd_evict_process_device(pdd);
119
120 memset(&info, 0, sizeof(info));
121 amdgpu_amdkfd_gpuvm_get_vm_fault_info(adev: dev->adev, info: &info);
122 if (!info.page_addr && !info.status) {
123 kfd_unref_process(p);
124 return;
125 }
126
127 kfd_signal_vm_fault_event(pdd, info: &info, NULL);
128 kfd_unref_process(p);
129 }
130}
131
132const struct kfd_event_interrupt_class event_interrupt_class_cik = {
133 .interrupt_isr = cik_event_interrupt_isr,
134 .interrupt_wq = cik_event_interrupt_wq,
135};
136

source code of linux/drivers/gpu/drm/amd/amdkfd/cik_event_interrupt.c