cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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nv31.c (2775B)

      1/*
      2 * Copyright 2012 Nouveau Community
      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: Martin Peres <martin.peres@labri.fr>
     23 *          Ben Skeggs
     24 */
     25#include "priv.h"
     26
     27#include <subdev/gpio.h>
     28#include <subdev/therm.h>
     29
     30static void
     31nv31_bus_intr(struct nvkm_bus *bus)
     32{
     33	struct nvkm_subdev *subdev = &bus->subdev;
     34	struct nvkm_device *device = subdev->device;
     35	u32 stat = nvkm_rd32(device, 0x001100) & nvkm_rd32(device, 0x001140);
     36	u32 gpio = nvkm_rd32(device, 0x001104) & nvkm_rd32(device, 0x001144);
     37
     38	if (gpio) {
     39		struct nvkm_gpio *gpio = device->gpio;
     40		if (gpio)
     41			nvkm_subdev_intr(&gpio->subdev);
     42	}
     43
     44	if (stat & 0x00000008) {  /* NV41- */
     45		u32 addr = nvkm_rd32(device, 0x009084);
     46		u32 data = nvkm_rd32(device, 0x009088);
     47
     48		nvkm_error_ratelimited(subdev, "MMIO %s of %08x FAULT at %06x\n",
     49				       (addr & 0x00000002) ? "write" : "read", data,
     50				       (addr & 0x00fffffc));
     51
     52		stat &= ~0x00000008;
     53		nvkm_wr32(device, 0x001100, 0x00000008);
     54	}
     55
     56	if (stat & 0x00070000) {
     57		struct nvkm_therm *therm = device->therm;
     58		if (therm)
     59			nvkm_subdev_intr(&therm->subdev);
     60		stat &= ~0x00070000;
     61		nvkm_wr32(device, 0x001100, 0x00070000);
     62	}
     63
     64	if (stat) {
     65		nvkm_error(subdev, "intr %08x\n", stat);
     66		nvkm_mask(device, 0x001140, stat, 0x00000000);
     67	}
     68}
     69
     70static void
     71nv31_bus_init(struct nvkm_bus *bus)
     72{
     73	struct nvkm_device *device = bus->subdev.device;
     74	nvkm_wr32(device, 0x001100, 0xffffffff);
     75	nvkm_wr32(device, 0x001140, 0x00070008);
     76}
     77
     78static const struct nvkm_bus_func
     79nv31_bus = {
     80	.init = nv31_bus_init,
     81	.intr = nv31_bus_intr,
     82};
     83
     84int
     85nv31_bus_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
     86	     struct nvkm_bus **pbus)
     87{
     88	return nvkm_bus_new_(&nv31_bus, device, type, inst, pbus);
     89}