1 /* $NetBSD: cik_event_interrupt.c,v 1.3 2021/12/18 23:44:59 riastradh Exp $ */
2
3 /*
4 * Copyright 2014 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <sys/cdefs.h>
26 __KERNEL_RCSID(0, "$NetBSD: cik_event_interrupt.c,v 1.3 2021/12/18 23:44:59 riastradh Exp $");
27
28 #include "kfd_priv.h"
29 #include "kfd_events.h"
30 #include "cik_int.h"
31 #include "amdgpu_amdkfd.h"
32
cik_event_interrupt_isr(struct kfd_dev * dev,const uint32_t * ih_ring_entry,uint32_t * patched_ihre,bool * patched_flag)33 static bool cik_event_interrupt_isr(struct kfd_dev *dev,
34 const uint32_t *ih_ring_entry,
35 uint32_t *patched_ihre,
36 bool *patched_flag)
37 {
38 const struct cik_ih_ring_entry *ihre =
39 (const struct cik_ih_ring_entry *)ih_ring_entry;
40 const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
41 unsigned int vmid;
42 uint16_t pasid;
43 bool ret;
44
45 /* This workaround is due to HW/FW limitation on Hawaii that
46 * VMID and PASID are not written into ih_ring_entry
47 */
48 if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
49 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
50 dev->device_info->asic_family == CHIP_HAWAII) {
51 struct cik_ih_ring_entry *tmp_ihre =
52 (struct cik_ih_ring_entry *)patched_ihre;
53
54 *patched_flag = true;
55 *tmp_ihre = *ihre;
56
57 vmid = f2g->read_vmid_from_vmfault_reg(dev->kgd);
58 ret = f2g->get_atc_vmid_pasid_mapping_info(dev->kgd, vmid, &pasid);
59
60 tmp_ihre->ring_id &= 0x000000ff;
61 tmp_ihre->ring_id |= vmid << 8;
62 tmp_ihre->ring_id |= pasid << 16;
63
64 return ret && (pasid != 0) &&
65 vmid >= dev->vm_info.first_vmid_kfd &&
66 vmid <= dev->vm_info.last_vmid_kfd;
67 }
68
69 /* Only handle interrupts from KFD VMIDs */
70 vmid = (ihre->ring_id & 0x0000ff00) >> 8;
71 if (vmid < dev->vm_info.first_vmid_kfd ||
72 vmid > dev->vm_info.last_vmid_kfd)
73 return 0;
74
75 /* If there is no valid PASID, it's likely a firmware bug */
76 pasid = (ihre->ring_id & 0xffff0000) >> 16;
77 if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
78 return 0;
79
80 /* Interrupt types we care about: various signals and faults.
81 * They will be forwarded to a work queue (see below).
82 */
83 return ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
84 ihre->source_id == CIK_INTSRC_SDMA_TRAP ||
85 ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG ||
86 ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE ||
87 ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
88 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT;
89 }
90
cik_event_interrupt_wq(struct kfd_dev * dev,const uint32_t * ih_ring_entry)91 static void cik_event_interrupt_wq(struct kfd_dev *dev,
92 const uint32_t *ih_ring_entry)
93 {
94 const struct cik_ih_ring_entry *ihre =
95 (const struct cik_ih_ring_entry *)ih_ring_entry;
96 uint32_t context_id = ihre->data & 0xfffffff;
97 unsigned int vmid = (ihre->ring_id & 0x0000ff00) >> 8;
98 unsigned int pasid = (ihre->ring_id & 0xffff0000) >> 16;
99
100 if (pasid == 0)
101 return;
102
103 if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
104 kfd_signal_event_interrupt(pasid, context_id, 28);
105 else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
106 kfd_signal_event_interrupt(pasid, context_id, 28);
107 else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
108 kfd_signal_event_interrupt(pasid, context_id & 0xff, 8);
109 else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
110 kfd_signal_hw_exception_event(pasid);
111 else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
112 ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
113 struct kfd_vm_fault_info info;
114
115 kfd_process_vm_fault(dev->dqm, pasid);
116
117 memset(&info, 0, sizeof(info));
118 amdgpu_amdkfd_gpuvm_get_vm_fault_info(dev->kgd, &info);
119 if (!info.page_addr && !info.status)
120 return;
121
122 if (info.vmid == vmid)
123 kfd_signal_vm_fault_event(dev, pasid, &info);
124 else
125 kfd_signal_vm_fault_event(dev, pasid, NULL);
126 }
127 }
128
129 const struct kfd_event_interrupt_class event_interrupt_class_cik = {
130 .interrupt_isr = cik_event_interrupt_isr,
131 .interrupt_wq = cik_event_interrupt_wq,
132 };
133