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	unsigned int vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
95	u32 pasid = (ihre->ring_id & 0xffff0000) >> 16;
96
97	if (pasid == 0)
98		return;
99
100	if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
101		kfd_signal_event_interrupt(pasid, context_id, 28);
102	else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
103		kfd_signal_event_interrupt(pasid, context_id, 28);
104	else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
105		kfd_signal_event_interrupt(pasid, context_id & 0xff, 8);
106	else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
107		kfd_signal_hw_exception_event(pasid);
108	else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
109		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
110		struct kfd_vm_fault_info info;
111
112		kfd_smi_event_update_vmfault(dev, pasid);
113		kfd_dqm_evict_pasid(dev->dqm, pasid);
114
115		memset(&info, 0, sizeof(info));
116		amdgpu_amdkfd_gpuvm_get_vm_fault_info(dev->adev, &info);
117		if (!info.page_addr && !info.status)
118			return;
119
120		if (info.vmid == vmid)
121			kfd_signal_vm_fault_event(dev, pasid, &info, NULL);
122		else
123			kfd_signal_vm_fault_event(dev, pasid, NULL, NULL);
124	}
125}
126
127const struct kfd_event_interrupt_class event_interrupt_class_cik = {
128	.interrupt_isr = cik_event_interrupt_isr,
129	.interrupt_wq = cik_event_interrupt_wq,
130};
131