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

gf100.c (3954B)

      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#include <subdev/timer.h>
     26
     27static void
     28gf100_privring_intr_hub(struct nvkm_subdev *privring, int i)
     29{
     30	struct nvkm_device *device = privring->device;
     31	u32 addr = nvkm_rd32(device, 0x122120 + (i * 0x0400));
     32	u32 data = nvkm_rd32(device, 0x122124 + (i * 0x0400));
     33	u32 stat = nvkm_rd32(device, 0x122128 + (i * 0x0400));
     34	nvkm_debug(privring, "HUB%d: %06x %08x (%08x)\n", i, addr, data, stat);
     35}
     36
     37static void
     38gf100_privring_intr_rop(struct nvkm_subdev *privring, int i)
     39{
     40	struct nvkm_device *device = privring->device;
     41	u32 addr = nvkm_rd32(device, 0x124120 + (i * 0x0400));
     42	u32 data = nvkm_rd32(device, 0x124124 + (i * 0x0400));
     43	u32 stat = nvkm_rd32(device, 0x124128 + (i * 0x0400));
     44	nvkm_debug(privring, "ROP%d: %06x %08x (%08x)\n", i, addr, data, stat);
     45}
     46
     47static void
     48gf100_privring_intr_gpc(struct nvkm_subdev *privring, int i)
     49{
     50	struct nvkm_device *device = privring->device;
     51	u32 addr = nvkm_rd32(device, 0x128120 + (i * 0x0400));
     52	u32 data = nvkm_rd32(device, 0x128124 + (i * 0x0400));
     53	u32 stat = nvkm_rd32(device, 0x128128 + (i * 0x0400));
     54	nvkm_debug(privring, "GPC%d: %06x %08x (%08x)\n", i, addr, data, stat);
     55}
     56
     57void
     58gf100_privring_intr(struct nvkm_subdev *privring)
     59{
     60	struct nvkm_device *device = privring->device;
     61	u32 intr0 = nvkm_rd32(device, 0x121c58);
     62	u32 intr1 = nvkm_rd32(device, 0x121c5c);
     63	u32 hubnr = nvkm_rd32(device, 0x121c70);
     64	u32 ropnr = nvkm_rd32(device, 0x121c74);
     65	u32 gpcnr = nvkm_rd32(device, 0x121c78);
     66	u32 i;
     67
     68	for (i = 0; (intr0 & 0x0000ff00) && i < hubnr; i++) {
     69		u32 stat = 0x00000100 << i;
     70		if (intr0 & stat) {
     71			gf100_privring_intr_hub(privring, i);
     72			intr0 &= ~stat;
     73		}
     74	}
     75
     76	for (i = 0; (intr0 & 0xffff0000) && i < ropnr; i++) {
     77		u32 stat = 0x00010000 << i;
     78		if (intr0 & stat) {
     79			gf100_privring_intr_rop(privring, i);
     80			intr0 &= ~stat;
     81		}
     82	}
     83
     84	for (i = 0; intr1 && i < gpcnr; i++) {
     85		u32 stat = 0x00000001 << i;
     86		if (intr1 & stat) {
     87			gf100_privring_intr_gpc(privring, i);
     88			intr1 &= ~stat;
     89		}
     90	}
     91
     92	nvkm_mask(device, 0x121c4c, 0x0000003f, 0x00000002);
     93	nvkm_msec(device, 2000,
     94		if (!(nvkm_rd32(device, 0x121c4c) & 0x0000003f))
     95			break;
     96	);
     97}
     98
     99static int
    100gf100_privring_init(struct nvkm_subdev *privring)
    101{
    102	struct nvkm_device *device = privring->device;
    103	nvkm_mask(device, 0x122310, 0x0003ffff, 0x00000800);
    104	nvkm_wr32(device, 0x12232c, 0x00100064);
    105	nvkm_wr32(device, 0x122330, 0x00100064);
    106	nvkm_wr32(device, 0x122334, 0x00100064);
    107	nvkm_mask(device, 0x122348, 0x0003ffff, 0x00000100);
    108	return 0;
    109}
    110
    111static const struct nvkm_subdev_func
    112gf100_privring = {
    113	.init = gf100_privring_init,
    114	.intr = gf100_privring_intr,
    115};
    116
    117int
    118gf100_privring_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
    119		   struct nvkm_subdev **pprivring)
    120{
    121	return nvkm_subdev_new_(&gf100_privring, device, type, inst, pprivring);
    122}