1 /*
2  * Copyright 2018 Red Hat 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 #include "priv.h"
23 
24 #include <core/memory.h>
25 #include <subdev/mc.h>
26 #include <subdev/mmu.h>
27 #include <subdev/vfn.h>
28 #include <engine/fifo.h>
29 
30 #include <nvif/class.h>
31 
32 static irqreturn_t
33 tu102_fault_buffer_notify(struct nvkm_inth *inth)
34 {
35 	struct nvkm_fault_buffer *buffer = container_of(inth, typeof(*buffer), inth);
36 
37 	nvkm_event_ntfy(&buffer->fault->event, buffer->id, NVKM_FAULT_BUFFER_EVENT_PENDING);
38 	return IRQ_HANDLED;
39 }
40 
41 static void
42 tu102_fault_buffer_intr(struct nvkm_fault_buffer *buffer, bool enable)
43 {
44 	if (enable)
45 		nvkm_inth_allow(&buffer->inth);
46 	else
47 		nvkm_inth_block(&buffer->inth);
48 }
49 
50 static void
51 tu102_fault_buffer_fini(struct nvkm_fault_buffer *buffer)
52 {
53 	struct nvkm_device *device = buffer->fault->subdev.device;
54 	const u32 foff = buffer->id * 0x20;
55 
56 	nvkm_mask(device, 0xb83010 + foff, 0x80000000, 0x00000000);
57 }
58 
59 static void
60 tu102_fault_buffer_init(struct nvkm_fault_buffer *buffer)
61 {
62 	struct nvkm_device *device = buffer->fault->subdev.device;
63 	const u32 foff = buffer->id * 0x20;
64 
65 	nvkm_mask(device, 0xb83010 + foff, 0xc0000000, 0x40000000);
66 	nvkm_wr32(device, 0xb83004 + foff, upper_32_bits(buffer->addr));
67 	nvkm_wr32(device, 0xb83000 + foff, lower_32_bits(buffer->addr));
68 	nvkm_mask(device, 0xb83010 + foff, 0x80000000, 0x80000000);
69 }
70 
71 static void
72 tu102_fault_buffer_info(struct nvkm_fault_buffer *buffer)
73 {
74 	struct nvkm_device *device = buffer->fault->subdev.device;
75 	const u32 foff = buffer->id * 0x20;
76 
77 	nvkm_mask(device, 0xb83010 + foff, 0x40000000, 0x40000000);
78 
79 	buffer->entries = nvkm_rd32(device, 0xb83010 + foff) & 0x000fffff;
80 	buffer->get = 0xb83008 + foff;
81 	buffer->put = 0xb8300c + foff;
82 }
83 
84 static irqreturn_t
85 tu102_fault_info_fault(struct nvkm_inth *inth)
86 {
87 	struct nvkm_fault *fault = container_of(inth, typeof(*fault), info_fault);
88 	struct nvkm_subdev *subdev = &fault->subdev;
89 	struct nvkm_device *device = subdev->device;
90 	struct nvkm_fault_data info;
91 	const u32 addrlo = nvkm_rd32(device, 0xb83080);
92 	const u32 addrhi = nvkm_rd32(device, 0xb83084);
93 	const u32  info0 = nvkm_rd32(device, 0xb83088);
94 	const u32 insthi = nvkm_rd32(device, 0xb8308c);
95 	const u32  info1 = nvkm_rd32(device, 0xb83090);
96 
97 	info.addr = ((u64)addrhi << 32) | addrlo;
98 	info.inst = ((u64)insthi << 32) | (info0 & 0xfffff000);
99 	info.time = 0;
100 	info.engine = (info0 & 0x000000ff);
101 	info.valid  = (info1 & 0x80000000) >> 31;
102 	info.gpc    = (info1 & 0x1f000000) >> 24;
103 	info.hub    = (info1 & 0x00100000) >> 20;
104 	info.access = (info1 & 0x000f0000) >> 16;
105 	info.client = (info1 & 0x00007f00) >> 8;
106 	info.reason = (info1 & 0x0000001f);
107 
108 	nvkm_fifo_fault(device->fifo, &info);
109 
110 	nvkm_wr32(device, 0xb83094, 0x80000000);
111 	return IRQ_HANDLED;
112 }
113 
114 static void
115 tu102_fault_fini(struct nvkm_fault *fault)
116 {
117 	nvkm_event_ntfy_block(&fault->nrpfb);
118 	flush_work(&fault->nrpfb_work);
119 
120 	if (fault->buffer[0])
121 		fault->func->buffer.fini(fault->buffer[0]);
122 
123 	nvkm_inth_block(&fault->info_fault);
124 }
125 
126 static void
127 tu102_fault_init(struct nvkm_fault *fault)
128 {
129 	nvkm_inth_allow(&fault->info_fault);
130 
131 	fault->func->buffer.init(fault->buffer[0]);
132 	nvkm_event_ntfy_allow(&fault->nrpfb);
133 }
134 
135 static int
136 tu102_fault_oneinit(struct nvkm_fault *fault)
137 {
138 	struct nvkm_device *device = fault->subdev.device;
139 	struct nvkm_intr *intr = &device->vfn->intr;
140 	int ret, i;
141 
142 	ret = nvkm_inth_add(intr, nvkm_rd32(device, 0x100ee0) & 0x0000ffff,
143 			    NVKM_INTR_PRIO_NORMAL, &fault->subdev, tu102_fault_info_fault,
144 			    &fault->info_fault);
145 	if (ret)
146 		return ret;
147 
148 	for (i = 0; i < fault->buffer_nr; i++) {
149 		ret = nvkm_inth_add(intr, nvkm_rd32(device, 0x100ee4 + (i * 4)) >> 16,
150 				    NVKM_INTR_PRIO_NORMAL, &fault->subdev,
151 				    tu102_fault_buffer_notify, &fault->buffer[i]->inth);
152 		if (ret)
153 			return ret;
154 	}
155 
156 	return gv100_fault_oneinit(fault);
157 }
158 
159 static const struct nvkm_fault_func
160 tu102_fault = {
161 	.oneinit = tu102_fault_oneinit,
162 	.init = tu102_fault_init,
163 	.fini = tu102_fault_fini,
164 	.buffer.nr = 2,
165 	.buffer.entry_size = 32,
166 	.buffer.info = tu102_fault_buffer_info,
167 	.buffer.pin = gp100_fault_buffer_pin,
168 	.buffer.init = tu102_fault_buffer_init,
169 	.buffer.fini = tu102_fault_buffer_fini,
170 	.buffer.intr = tu102_fault_buffer_intr,
171 	.user = { { 0, 0, VOLTA_FAULT_BUFFER_A }, 1 },
172 };
173 
174 int
175 tu102_fault_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
176 		struct nvkm_fault **pfault)
177 {
178 	int ret = nvkm_fault_new_(&tu102_fault, device, type, inst, pfault);
179 	if (ret)
180 		return ret;
181 
182 	INIT_WORK(&(*pfault)->nrpfb_work, gv100_fault_buffer_process);
183 	return 0;
184 }
185