subdev/fault/base.c

0001 /*
0002  * Copyright 2018 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  */
0022 #include "priv.h"
0023
0024 #include <core/memory.h>
0025 #include <core/notify.h>
0026
0027 static void
0028 nvkm_fault_ntfy_fini(struct nvkm_event *event, int type, int index)
0029 {
0030     struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
0031     fault->func->buffer.intr(fault->buffer[index], false);
0032 }
0033
0034 static void
0035 nvkm_fault_ntfy_init(struct nvkm_event *event, int type, int index)
0036 {
0037     struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
0038     fault->func->buffer.intr(fault->buffer[index], true);
0039 }
0040
0041 static int
0042 nvkm_fault_ntfy_ctor(struct nvkm_object *object, void *argv, u32 argc,
0043              struct nvkm_notify *notify)
0044 {
0045     struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
0046     if (argc == 0) {
0047         notify->size  = 0;
0048         notify->types = 1;
0049         notify->index = buffer->id;
0050         return 0;
0051     }
0052     return -ENOSYS;
0053 }
0054
0055 static const struct nvkm_event_func
0056 nvkm_fault_ntfy = {
0057     .ctor = nvkm_fault_ntfy_ctor,
0058     .init = nvkm_fault_ntfy_init,
0059     .fini = nvkm_fault_ntfy_fini,
0060 };
0061
0062 static void
0063 nvkm_fault_intr(struct nvkm_subdev *subdev)
0064 {
0065     struct nvkm_fault *fault = nvkm_fault(subdev);
0066     return fault->func->intr(fault);
0067 }
0068
0069 static int
0070 nvkm_fault_fini(struct nvkm_subdev *subdev, bool suspend)
0071 {
0072     struct nvkm_fault *fault = nvkm_fault(subdev);
0073     if (fault->func->fini)
0074         fault->func->fini(fault);
0075     return 0;
0076 }
0077
0078 static int
0079 nvkm_fault_init(struct nvkm_subdev *subdev)
0080 {
0081     struct nvkm_fault *fault = nvkm_fault(subdev);
0082     if (fault->func->init)
0083         fault->func->init(fault);
0084     return 0;
0085 }
0086
0087 static int
0088 nvkm_fault_oneinit_buffer(struct nvkm_fault *fault, int id)
0089 {
0090     struct nvkm_subdev *subdev = &fault->subdev;
0091     struct nvkm_device *device = subdev->device;
0092     struct nvkm_fault_buffer *buffer;
0093     int ret;
0094
0095     if (!(buffer = kzalloc(sizeof(*buffer), GFP_KERNEL)))
0096         return -ENOMEM;
0097     buffer->fault = fault;
0098     buffer->id = id;
0099     fault->func->buffer.info(buffer);
0100     fault->buffer[id] = buffer;
0101
0102     nvkm_debug(subdev, "buffer %d: %d entries\n", id, buffer->entries);
0103
0104     ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, buffer->entries *
0105                   fault->func->buffer.entry_size, 0x1000, true,
0106                   &buffer->mem);
0107     if (ret)
0108         return ret;
0109
0110     /* Pin fault buffer in BAR2. */
0111     buffer->addr = fault->func->buffer.pin(buffer);
0112     if (buffer->addr == ~0ULL)
0113         return -EFAULT;
0114
0115     return 0;
0116 }
0117
0118 static int
0119 nvkm_fault_oneinit(struct nvkm_subdev *subdev)
0120 {
0121     struct nvkm_fault *fault = nvkm_fault(subdev);
0122     int ret, i;
0123
0124     for (i = 0; i < ARRAY_SIZE(fault->buffer); i++) {
0125         if (i < fault->func->buffer.nr) {
0126             ret = nvkm_fault_oneinit_buffer(fault, i);
0127             if (ret)
0128                 return ret;
0129             fault->buffer_nr = i + 1;
0130         }
0131     }
0132
0133     ret = nvkm_event_init(&nvkm_fault_ntfy, 1, fault->buffer_nr,
0134                   &fault->event);
0135     if (ret)
0136         return ret;
0137
0138     if (fault->func->oneinit)
0139         ret = fault->func->oneinit(fault);
0140     return ret;
0141 }
0142
0143 static void *
0144 nvkm_fault_dtor(struct nvkm_subdev *subdev)
0145 {
0146     struct nvkm_fault *fault = nvkm_fault(subdev);
0147     int i;
0148
0149     nvkm_notify_fini(&fault->nrpfb);
0150     nvkm_event_fini(&fault->event);
0151
0152     for (i = 0; i < fault->buffer_nr; i++) {
0153         if (fault->buffer[i]) {
0154             nvkm_memory_unref(&fault->buffer[i]->mem);
0155             kfree(fault->buffer[i]);
0156         }
0157     }
0158
0159     return fault;
0160 }
0161
0162 static const struct nvkm_subdev_func
0163 nvkm_fault = {
0164     .dtor = nvkm_fault_dtor,
0165     .oneinit = nvkm_fault_oneinit,
0166     .init = nvkm_fault_init,
0167     .fini = nvkm_fault_fini,
0168     .intr = nvkm_fault_intr,
0169 };
0170
0171 int
0172 nvkm_fault_new_(const struct nvkm_fault_func *func, struct nvkm_device *device,
0173         enum nvkm_subdev_type type, int inst, struct nvkm_fault **pfault)
0174 {
0175     struct nvkm_fault *fault;
0176     if (!(fault = *pfault = kzalloc(sizeof(*fault), GFP_KERNEL)))
0177         return -ENOMEM;
0178     nvkm_subdev_ctor(&nvkm_fault, device, type, inst, &fault->subdev);
0179     fault->func = func;
0180     fault->user.ctor = nvkm_ufault_new;
0181     fault->user.base = func->user.base;
0182     return 0;
0183 }