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

gf119.c (2832B)

      1/*
      2 * Copyright 2012 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
     23 */
     24#include "priv.h"
     25
     26void
     27gf119_gpio_reset(struct nvkm_gpio *gpio, u8 match)
     28{
     29	struct nvkm_device *device = gpio->subdev.device;
     30	struct nvkm_bios *bios = device->bios;
     31	u8 ver, len;
     32	u16 entry;
     33	int ent = -1;
     34
     35	while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
     36		u32 data = nvbios_rd32(bios, entry);
     37		u8  line =   (data & 0x0000003f);
     38		u8  defs = !!(data & 0x00000080);
     39		u8  func =   (data & 0x0000ff00) >> 8;
     40		u8  unk0 =   (data & 0x00ff0000) >> 16;
     41		u8  unk1 =   (data & 0x1f000000) >> 24;
     42
     43		if ( func  == DCB_GPIO_UNUSED ||
     44		    (match != DCB_GPIO_UNUSED && match != func))
     45			continue;
     46
     47		nvkm_gpio_set(gpio, 0, func, line, defs);
     48
     49		nvkm_mask(device, 0x00d610 + (line * 4), 0xff, unk0);
     50		if (unk1--)
     51			nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
     52	}
     53}
     54
     55int
     56gf119_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
     57{
     58	struct nvkm_device *device = gpio->subdev.device;
     59	u32 data = ((dir ^ 1) << 13) | (out << 12);
     60	nvkm_mask(device, 0x00d610 + (line * 4), 0x00003000, data);
     61	nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
     62	return 0;
     63}
     64
     65int
     66gf119_gpio_sense(struct nvkm_gpio *gpio, int line)
     67{
     68	struct nvkm_device *device = gpio->subdev.device;
     69	return !!(nvkm_rd32(device, 0x00d610 + (line * 4)) & 0x00004000);
     70}
     71
     72static const struct nvkm_gpio_func
     73gf119_gpio = {
     74	.lines = 32,
     75	.intr_stat = g94_gpio_intr_stat,
     76	.intr_mask = g94_gpio_intr_mask,
     77	.drive = gf119_gpio_drive,
     78	.sense = gf119_gpio_sense,
     79	.reset = gf119_gpio_reset,
     80};
     81
     82int
     83gf119_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
     84	       struct nvkm_gpio **pgpio)
     85{
     86	return nvkm_gpio_new_(&gf119_gpio, device, type, inst, pgpio);
     87}