base.c

  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
 26static void
 27nvkm_fault_ntfy_fini(struct nvkm_event *event, int type, int index)
 28{
 29	struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
 30	fault->func->buffer.intr(fault->buffer[index], false);
 31}
 32
 33static void
 34nvkm_fault_ntfy_init(struct nvkm_event *event, int type, int index)
 35{
 36	struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
 37	fault->func->buffer.intr(fault->buffer[index], true);
 38}
 39
 40static const struct nvkm_event_func
 41nvkm_fault_ntfy = {
 42	.init = nvkm_fault_ntfy_init,
 43	.fini = nvkm_fault_ntfy_fini,
 44};
 45
 46static void
 47nvkm_fault_intr(struct nvkm_subdev *subdev)
 48{
 49	struct nvkm_fault *fault = nvkm_fault(subdev);
 50	return fault->func->intr(fault);
 51}
 52
 53static int
 54nvkm_fault_fini(struct nvkm_subdev *subdev, enum nvkm_suspend_state suspend)
 55{
 56	struct nvkm_fault *fault = nvkm_fault(subdev);
 57	if (fault->func->fini)
 58		fault->func->fini(fault);
 59	return 0;
 60}
 61
 62static int
 63nvkm_fault_init(struct nvkm_subdev *subdev)
 64{
 65	struct nvkm_fault *fault = nvkm_fault(subdev);
 66	if (fault->func->init)
 67		fault->func->init(fault);
 68	return 0;
 69}
 70
 71static int
 72nvkm_fault_oneinit_buffer(struct nvkm_fault *fault, int id)
 73{
 74	struct nvkm_subdev *subdev = &fault->subdev;
 75	struct nvkm_device *device = subdev->device;
 76	struct nvkm_fault_buffer *buffer;
 77	int ret;
 78
 79	if (!(buffer = kzalloc(sizeof(*buffer), GFP_KERNEL)))
 80		return -ENOMEM;
 81	buffer->fault = fault;
 82	buffer->id = id;
 83	fault->func->buffer.info(buffer);
 84	fault->buffer[id] = buffer;
 85
 86	nvkm_debug(subdev, "buffer %d: %d entries\n", id, buffer->entries);
 87
 88	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, buffer->entries *
 89			      fault->func->buffer.entry_size, 0x1000, true,
 90			      &buffer->mem);
 91	if (ret)
 92		return ret;
 93
 94	/* Pin fault buffer in BAR2. */
 95	buffer->addr = fault->func->buffer.pin(buffer);
 96	if (buffer->addr == ~0ULL)
 97		return -EFAULT;
 98
 99	return 0;
100}
101
102static int
103nvkm_fault_oneinit(struct nvkm_subdev *subdev)
104{
105	struct nvkm_fault *fault = nvkm_fault(subdev);
106	int ret, i;
107
108	for (i = 0; i < ARRAY_SIZE(fault->buffer); i++) {
109		if (i < fault->func->buffer.nr) {
110			ret = nvkm_fault_oneinit_buffer(fault, i);
111			if (ret)
112				return ret;
113			fault->buffer_nr = i + 1;
114		}
115	}
116
117	ret = nvkm_event_init(&nvkm_fault_ntfy, subdev, 1, fault->buffer_nr, &fault->event);
118	if (ret)
119		return ret;
120
121	if (fault->func->oneinit)
122		ret = fault->func->oneinit(fault);
123	return ret;
124}
125
126static void *
127nvkm_fault_dtor(struct nvkm_subdev *subdev)
128{
129	struct nvkm_fault *fault = nvkm_fault(subdev);
130	int i;
131
132	nvkm_event_ntfy_del(&fault->nrpfb);
133	nvkm_event_fini(&fault->event);
134
135	for (i = 0; i < fault->buffer_nr; i++) {
136		if (fault->buffer[i]) {
137			nvkm_memory_unref(&fault->buffer[i]->mem);
138			kfree(fault->buffer[i]);
139		}
140	}
141
142	return fault;
143}
144
145static const struct nvkm_subdev_func
146nvkm_fault = {
147	.dtor = nvkm_fault_dtor,
148	.oneinit = nvkm_fault_oneinit,
149	.init = nvkm_fault_init,
150	.fini = nvkm_fault_fini,
151	.intr = nvkm_fault_intr,
152};
153
154int
155nvkm_fault_new_(const struct nvkm_fault_func *func, struct nvkm_device *device,
156		enum nvkm_subdev_type type, int inst, struct nvkm_fault **pfault)
157{
158	struct nvkm_fault *fault;
159	if (!(fault = *pfault = kzalloc(sizeof(*fault), GFP_KERNEL)))
160		return -ENOMEM;
161	nvkm_subdev_ctor(&nvkm_fault, device, type, inst, &fault->subdev);
162	fault->func = func;
163	fault->user.ctor = nvkm_ufault_new;
164	fault->user.base = func->user.base;
165	return 0;
166}