1 /* $NetBSD: nouveau_nvkm_subdev_fault_tu102.c,v 1.2 2021/12/18 23:45:39 riastradh Exp $ */
2
3 /*
4 * Copyright 2018 Red Hat 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 #include <sys/cdefs.h>
25 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fault_tu102.c,v 1.2 2021/12/18 23:45:39 riastradh Exp $");
26
27 #include "priv.h"
28
29 #include <core/memory.h>
30 #include <subdev/mmu.h>
31 #include <engine/fifo.h>
32
33 #include <nvif/class.h>
34
35 static void
tu102_fault_buffer_intr(struct nvkm_fault_buffer * buffer,bool enable)36 tu102_fault_buffer_intr(struct nvkm_fault_buffer *buffer, bool enable)
37 {
38 /*XXX: Earlier versions of RM touched the old regs on Turing,
39 * which don't appear to actually work anymore, but newer
40 * versions of RM don't appear to touch anything at all..
41 */
42 }
43
44 static void
tu102_fault_buffer_fini(struct nvkm_fault_buffer * buffer)45 tu102_fault_buffer_fini(struct nvkm_fault_buffer *buffer)
46 {
47 struct nvkm_device *device = buffer->fault->subdev.device;
48 const u32 foff = buffer->id * 0x20;
49 nvkm_mask(device, 0xb83010 + foff, 0x80000000, 0x00000000);
50 }
51
52 static void
tu102_fault_buffer_init(struct nvkm_fault_buffer * buffer)53 tu102_fault_buffer_init(struct nvkm_fault_buffer *buffer)
54 {
55 struct nvkm_device *device = buffer->fault->subdev.device;
56 const u32 foff = buffer->id * 0x20;
57
58 nvkm_mask(device, 0xb83010 + foff, 0xc0000000, 0x40000000);
59 nvkm_wr32(device, 0xb83004 + foff, upper_32_bits(buffer->addr));
60 nvkm_wr32(device, 0xb83000 + foff, lower_32_bits(buffer->addr));
61 nvkm_mask(device, 0xb83010 + foff, 0x80000000, 0x80000000);
62 }
63
64 static void
tu102_fault_buffer_info(struct nvkm_fault_buffer * buffer)65 tu102_fault_buffer_info(struct nvkm_fault_buffer *buffer)
66 {
67 struct nvkm_device *device = buffer->fault->subdev.device;
68 const u32 foff = buffer->id * 0x20;
69
70 nvkm_mask(device, 0xb83010 + foff, 0x40000000, 0x40000000);
71
72 buffer->entries = nvkm_rd32(device, 0xb83010 + foff) & 0x000fffff;
73 buffer->get = 0xb83008 + foff;
74 buffer->put = 0xb8300c + foff;
75 }
76
77 static void
tu102_fault_intr_fault(struct nvkm_fault * fault)78 tu102_fault_intr_fault(struct nvkm_fault *fault)
79 {
80 struct nvkm_subdev *subdev = &fault->subdev;
81 struct nvkm_device *device = subdev->device;
82 struct nvkm_fault_data info;
83 const u32 addrlo = nvkm_rd32(device, 0xb83080);
84 const u32 addrhi = nvkm_rd32(device, 0xb83084);
85 const u32 info0 = nvkm_rd32(device, 0xb83088);
86 const u32 insthi = nvkm_rd32(device, 0xb8308c);
87 const u32 info1 = nvkm_rd32(device, 0xb83090);
88
89 info.addr = ((u64)addrhi << 32) | addrlo;
90 info.inst = ((u64)insthi << 32) | (info0 & 0xfffff000);
91 info.time = 0;
92 info.engine = (info0 & 0x000000ff);
93 info.valid = (info1 & 0x80000000) >> 31;
94 info.gpc = (info1 & 0x1f000000) >> 24;
95 info.hub = (info1 & 0x00100000) >> 20;
96 info.access = (info1 & 0x000f0000) >> 16;
97 info.client = (info1 & 0x00007f00) >> 8;
98 info.reason = (info1 & 0x0000001f);
99
100 nvkm_fifo_fault(device->fifo, &info);
101 }
102
103 static void
tu102_fault_intr(struct nvkm_fault * fault)104 tu102_fault_intr(struct nvkm_fault *fault)
105 {
106 struct nvkm_subdev *subdev = &fault->subdev;
107 struct nvkm_device *device = subdev->device;
108 u32 stat = nvkm_rd32(device, 0xb83094);
109
110 if (stat & 0x80000000) {
111 tu102_fault_intr_fault(fault);
112 nvkm_wr32(device, 0xb83094, 0x80000000);
113 stat &= ~0x80000000;
114 }
115
116 if (stat & 0x00000200) {
117 if (fault->buffer[0]) {
118 nvkm_event_send(&fault->event, 1, 0, NULL, 0);
119 stat &= ~0x00000200;
120 }
121 }
122
123 /*XXX: guess, can't confirm until we get fw... */
124 if (stat & 0x00000100) {
125 if (fault->buffer[1]) {
126 nvkm_event_send(&fault->event, 1, 1, NULL, 0);
127 stat &= ~0x00000100;
128 }
129 }
130
131 if (stat) {
132 nvkm_debug(subdev, "intr %08x\n", stat);
133 }
134 }
135
136 static void
tu102_fault_fini(struct nvkm_fault * fault)137 tu102_fault_fini(struct nvkm_fault *fault)
138 {
139 nvkm_notify_put(&fault->nrpfb);
140 if (fault->buffer[0])
141 fault->func->buffer.fini(fault->buffer[0]);
142 /*XXX: disable priv faults */
143 }
144
145 static void
tu102_fault_init(struct nvkm_fault * fault)146 tu102_fault_init(struct nvkm_fault *fault)
147 {
148 /*XXX: enable priv faults */
149 fault->func->buffer.init(fault->buffer[0]);
150 nvkm_notify_get(&fault->nrpfb);
151 }
152
153 static const struct nvkm_fault_func
154 tu102_fault = {
155 .oneinit = gv100_fault_oneinit,
156 .init = tu102_fault_init,
157 .fini = tu102_fault_fini,
158 .intr = tu102_fault_intr,
159 .buffer.nr = 2,
160 .buffer.entry_size = 32,
161 .buffer.info = tu102_fault_buffer_info,
162 .buffer.pin = gp100_fault_buffer_pin,
163 .buffer.init = tu102_fault_buffer_init,
164 .buffer.fini = tu102_fault_buffer_fini,
165 .buffer.intr = tu102_fault_buffer_intr,
166 .user = { { 0, 0, VOLTA_FAULT_BUFFER_A }, 1 },
167 };
168
169 int
tu102_fault_new(struct nvkm_device * device,int index,struct nvkm_fault ** pfault)170 tu102_fault_new(struct nvkm_device *device, int index,
171 struct nvkm_fault **pfault)
172 {
173 return nvkm_fault_new_(&tu102_fault, device, index, pfault);
174 }
175