1 /* $NetBSD: kfd_int_process_v9.c,v 1.2 2021/12/18 23:44:59 riastradh Exp $ */
2
3 /*
4 * Copyright 2016-2018 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: kfd_int_process_v9.c,v 1.2 2021/12/18 23:44:59 riastradh Exp $");
27
28 #include "kfd_priv.h"
29 #include "kfd_events.h"
30 #include "soc15_int.h"
31 #include "kfd_device_queue_manager.h"
32
event_interrupt_isr_v9(struct kfd_dev * dev,const uint32_t * ih_ring_entry,uint32_t * patched_ihre,bool * patched_flag)33 static bool event_interrupt_isr_v9(struct kfd_dev *dev,
34 const uint32_t *ih_ring_entry,
35 uint32_t *patched_ihre,
36 bool *patched_flag)
37 {
38 uint16_t source_id, client_id, pasid, vmid;
39 const uint32_t *data = ih_ring_entry;
40
41 /* Only handle interrupts from KFD VMIDs */
42 vmid = SOC15_VMID_FROM_IH_ENTRY(ih_ring_entry);
43 if (vmid < dev->vm_info.first_vmid_kfd ||
44 vmid > dev->vm_info.last_vmid_kfd)
45 return 0;
46
47 source_id = SOC15_SOURCE_ID_FROM_IH_ENTRY(ih_ring_entry);
48 client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
49 pasid = SOC15_PASID_FROM_IH_ENTRY(ih_ring_entry);
50
51 /* This is a known issue for gfx9. Under non HWS, pasid is not set
52 * in the interrupt payload, so we need to find out the pasid on our
53 * own.
54 */
55 if (!pasid && dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
56 const uint32_t pasid_mask = 0xffff;
57
58 *patched_flag = true;
59 memcpy(patched_ihre, ih_ring_entry,
60 dev->device_info->ih_ring_entry_size);
61
62 pasid = dev->dqm->vmid_pasid[vmid];
63
64 /* Patch the pasid field */
65 patched_ihre[3] = cpu_to_le32((le32_to_cpu(patched_ihre[3])
66 & ~pasid_mask) | pasid);
67 }
68
69 pr_debug("client id 0x%x, source id %d, vmid %d, pasid 0x%x. raw data:\n",
70 client_id, source_id, vmid, pasid);
71 pr_debug("%8X, %8X, %8X, %8X, %8X, %8X, %8X, %8X.\n",
72 data[0], data[1], data[2], data[3],
73 data[4], data[5], data[6], data[7]);
74
75 /* If there is no valid PASID, it's likely a bug */
76 if (WARN_ONCE(pasid == 0, "Bug: No PASID in KFD interrupt"))
77 return 0;
78
79 /* Interrupt types we care about: various signals and faults.
80 * They will be forwarded to a work queue (see below).
81 */
82 return source_id == SOC15_INTSRC_CP_END_OF_PIPE ||
83 source_id == SOC15_INTSRC_SDMA_TRAP ||
84 source_id == SOC15_INTSRC_SQ_INTERRUPT_MSG ||
85 source_id == SOC15_INTSRC_CP_BAD_OPCODE ||
86 client_id == SOC15_IH_CLIENTID_VMC ||
87 client_id == SOC15_IH_CLIENTID_VMC1 ||
88 client_id == SOC15_IH_CLIENTID_UTCL2;
89 }
90
event_interrupt_wq_v9(struct kfd_dev * dev,const uint32_t * ih_ring_entry)91 static void event_interrupt_wq_v9(struct kfd_dev *dev,
92 const uint32_t *ih_ring_entry)
93 {
94 uint16_t source_id, client_id, pasid, vmid;
95 uint32_t context_id;
96
97 source_id = SOC15_SOURCE_ID_FROM_IH_ENTRY(ih_ring_entry);
98 client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
99 pasid = SOC15_PASID_FROM_IH_ENTRY(ih_ring_entry);
100 vmid = SOC15_VMID_FROM_IH_ENTRY(ih_ring_entry);
101 context_id = SOC15_CONTEXT_ID0_FROM_IH_ENTRY(ih_ring_entry);
102
103 if (source_id == SOC15_INTSRC_CP_END_OF_PIPE)
104 kfd_signal_event_interrupt(pasid, context_id, 32);
105 else if (source_id == SOC15_INTSRC_SDMA_TRAP)
106 kfd_signal_event_interrupt(pasid, context_id & 0xfffffff, 28);
107 else if (source_id == SOC15_INTSRC_SQ_INTERRUPT_MSG)
108 kfd_signal_event_interrupt(pasid, context_id & 0xffffff, 24);
109 else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE)
110 kfd_signal_hw_exception_event(pasid);
111 else if (client_id == SOC15_IH_CLIENTID_VMC ||
112 client_id == SOC15_IH_CLIENTID_VMC1 ||
113 client_id == SOC15_IH_CLIENTID_UTCL2) {
114 struct kfd_vm_fault_info info = {0};
115 uint16_t ring_id = SOC15_RING_ID_FROM_IH_ENTRY(ih_ring_entry);
116
117 info.vmid = vmid;
118 info.mc_id = client_id;
119 info.page_addr = ih_ring_entry[4] |
120 (uint64_t)(ih_ring_entry[5] & 0xf) << 32;
121 info.prot_valid = ring_id & 0x08;
122 info.prot_read = ring_id & 0x10;
123 info.prot_write = ring_id & 0x20;
124
125 kfd_process_vm_fault(dev->dqm, pasid);
126 kfd_signal_vm_fault_event(dev, pasid, &info);
127 }
128 }
129
130 const struct kfd_event_interrupt_class event_interrupt_class_v9 = {
131 .interrupt_isr = event_interrupt_isr_v9,
132 .interrupt_wq = event_interrupt_wq_v9,
133 };
134