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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ramgm200.c (2204B)

      1/*
      2 * Copyright 2017 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 "ram.h"
     25
     26u32
     27gm200_ram_probe_fbp_amount(const struct nvkm_ram_func *func, u32 fbpao,
     28			   struct nvkm_device *device, int fbp, int *pltcs)
     29{
     30	u32 ltcs  = nvkm_rd32(device, 0x022450);
     31	u32 fbpas = nvkm_rd32(device, 0x022458);
     32	u32 fbpa  = fbp * fbpas;
     33	u32 size  = 0;
     34	if (!(nvkm_rd32(device, 0x021d38) & BIT(fbp))) {
     35		u32 ltco = nvkm_rd32(device, 0x021d70 + (fbp * 4));
     36		u32 ltcm = ~ltco & ((1 << ltcs) - 1);
     37
     38		while (fbpas--) {
     39			if (!(fbpao & (1 << fbpa)))
     40				size += func->probe_fbpa_amount(device, fbpa);
     41			fbpa++;
     42		}
     43
     44		*pltcs = hweight32(ltcm);
     45	}
     46	return size;
     47}
     48
     49static const struct nvkm_ram_func
     50gm200_ram = {
     51	.upper = 0x1000000000ULL,
     52	.probe_fbp = gm107_ram_probe_fbp,
     53	.probe_fbp_amount = gm200_ram_probe_fbp_amount,
     54	.probe_fbpa_amount = gf100_ram_probe_fbpa_amount,
     55	.dtor = gk104_ram_dtor,
     56	.init = gk104_ram_init,
     57	.calc = gk104_ram_calc,
     58	.prog = gk104_ram_prog,
     59	.tidy = gk104_ram_tidy,
     60};
     61
     62int
     63gm200_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
     64{
     65	return gk104_ram_new_(&gm200_ram, fb, pram);
     66}