base.c

  1/*
  2 * Copyright 2016 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 * Authors: Ben Skeggs <bskeggs@redhat.com>
 23 */
 24#include "priv.h"
 25
 26struct nvkm_top_device *
 27nvkm_top_device_new(struct nvkm_top *top)
 28{
 29	struct nvkm_top_device *info = kmalloc(sizeof(*info), GFP_KERNEL);
 30	if (info) {
 31		info->type = NVKM_SUBDEV_NR;
 32		info->inst = -1;
 33		info->addr = 0;
 34		info->fault = -1;
 35		info->engine = -1;
 36		info->runlist = -1;
 37		info->reset = -1;
 38		info->intr = -1;
 39		list_add_tail(&info->head, &top->device);
 40	}
 41	return info;
 42}
 43
 44u32
 45nvkm_top_addr(struct nvkm_device *device, enum nvkm_subdev_type type, int inst)
 46{
 47	struct nvkm_top *top = device->top;
 48	struct nvkm_top_device *info;
 49
 50	if (top) {
 51		list_for_each_entry(info, &top->device, head) {
 52			if (info->type == type && info->inst == inst)
 53				return info->addr;
 54		}
 55	}
 56
 57	return 0;
 58}
 59
 60u32
 61nvkm_top_reset(struct nvkm_device *device, enum nvkm_subdev_type type, int inst)
 62{
 63	struct nvkm_top *top = device->top;
 64	struct nvkm_top_device *info;
 65
 66	if (top) {
 67		list_for_each_entry(info, &top->device, head) {
 68			if (info->type == type && info->inst == inst && info->reset >= 0)
 69				return BIT(info->reset);
 70		}
 71	}
 72
 73	return 0;
 74}
 75
 76u32
 77nvkm_top_intr_mask(struct nvkm_device *device, enum nvkm_subdev_type type, int inst)
 78{
 79	struct nvkm_top *top = device->top;
 80	struct nvkm_top_device *info;
 81
 82	if (top) {
 83		list_for_each_entry(info, &top->device, head) {
 84			if (info->type == type && info->inst == inst && info->intr >= 0)
 85				return BIT(info->intr);
 86		}
 87	}
 88
 89	return 0;
 90}
 91
 92int
 93nvkm_top_fault_id(struct nvkm_device *device, enum nvkm_subdev_type type, int inst)
 94{
 95	struct nvkm_top *top = device->top;
 96	struct nvkm_top_device *info;
 97
 98	list_for_each_entry(info, &top->device, head) {
 99		if (info->type == type && info->inst == inst && info->fault >= 0)
100			return info->fault;
101	}
102
103	return -ENOENT;
104}
105
106struct nvkm_subdev *
107nvkm_top_fault(struct nvkm_device *device, int fault)
108{
109	struct nvkm_top *top = device->top;
110	struct nvkm_top_device *info;
111
112	list_for_each_entry(info, &top->device, head) {
113		if (info->fault == fault)
114			return nvkm_device_subdev(device, info->type, info->inst);
115	}
116
117	return NULL;
118}
119
120int
121nvkm_top_parse(struct nvkm_device *device)
122{
123	struct nvkm_top *top = device->top;
124
125	if (!top || !list_empty(&top->device))
126		return 0;
127
128	return top->func->parse(top);
129}
130
131static void *
132nvkm_top_dtor(struct nvkm_subdev *subdev)
133{
134	struct nvkm_top *top = nvkm_top(subdev);
135	struct nvkm_top_device *info, *temp;
136
137	list_for_each_entry_safe(info, temp, &top->device, head) {
138		list_del(&info->head);
139		kfree(info);
140	}
141
142	return top;
143}
144
145static const struct nvkm_subdev_func
146nvkm_top = {
147	.dtor = nvkm_top_dtor,
148};
149
150int
151nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device,
152	      enum nvkm_subdev_type type, int inst, struct nvkm_top **ptop)
153{
154	struct nvkm_top *top;
155	if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL)))
156		return -ENOMEM;
157	nvkm_subdev_ctor(&nvkm_top, device, type, inst, &top->subdev);
158	top->func = func;
159	INIT_LIST_HEAD(&top->device);
160	return 0;
161}