cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

base.c (4065B)

      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
    120static int
    121nvkm_top_oneinit(struct nvkm_subdev *subdev)
    122{
    123	struct nvkm_top *top = nvkm_top(subdev);
    124	return top->func->oneinit(top);
    125}
    126
    127static void *
    128nvkm_top_dtor(struct nvkm_subdev *subdev)
    129{
    130	struct nvkm_top *top = nvkm_top(subdev);
    131	struct nvkm_top_device *info, *temp;
    132
    133	list_for_each_entry_safe(info, temp, &top->device, head) {
    134		list_del(&info->head);
    135		kfree(info);
    136	}
    137
    138	return top;
    139}
    140
    141static const struct nvkm_subdev_func
    142nvkm_top = {
    143	.dtor = nvkm_top_dtor,
    144	.oneinit = nvkm_top_oneinit,
    145};
    146
    147int
    148nvkm_top_new_(const struct nvkm_top_func *func, struct nvkm_device *device,
    149	      enum nvkm_subdev_type type, int inst, struct nvkm_top **ptop)
    150{
    151	struct nvkm_top *top;
    152	if (!(top = *ptop = kzalloc(sizeof(*top), GFP_KERNEL)))
    153		return -ENOMEM;
    154	nvkm_subdev_ctor(&nvkm_top, device, type, inst, &top->subdev);
    155	top->func = func;
    156	INIT_LIST_HEAD(&top->device);
    157	return 0;
    158}