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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nv20.c (3208B)

      1/*
      2 * Copyright (C) 2010 Francisco Jerez.
      3 * All Rights Reserved.
      4 *
      5 * Permission is hereby granted, free of charge, to any person obtaining
      6 * a copy of this software and associated documentation files (the
      7 * "Software"), to deal in the Software without restriction, including
      8 * without limitation the rights to use, copy, modify, merge, publish,
      9 * distribute, sublicense, and/or sell copies of the Software, and to
     10 * permit persons to whom the Software is furnished to do so, subject to
     11 * the following conditions:
     12 *
     13 * The above copyright notice and this permission notice (including the
     14 * next paragraph) shall be included in all copies or substantial
     15 * portions of the Software.
     16 *
     17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
     21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     24 *
     25 */
     26#include "priv.h"
     27#include "ram.h"
     28
     29void
     30nv20_fb_tile_init(struct nvkm_fb *fb, int i, u32 addr, u32 size, u32 pitch,
     31		  u32 flags, struct nvkm_fb_tile *tile)
     32{
     33	tile->addr  = 0x00000001 | addr;
     34	tile->limit = max(1u, addr + size) - 1;
     35	tile->pitch = pitch;
     36	if (flags & 4) {
     37		fb->func->tile.comp(fb, i, size, flags, tile);
     38		tile->addr |= 2;
     39	}
     40}
     41
     42static void
     43nv20_fb_tile_comp(struct nvkm_fb *fb, int i, u32 size, u32 flags,
     44		  struct nvkm_fb_tile *tile)
     45{
     46	u32 tiles = DIV_ROUND_UP(size, 0x40);
     47	u32 tags  = round_up(tiles / fb->ram->parts, 0x40);
     48	if (!nvkm_mm_head(&fb->tags.mm, 0, 1, tags, tags, 1, &tile->tag)) {
     49		if (!(flags & 2)) tile->zcomp = 0x00000000; /* Z16 */
     50		else              tile->zcomp = 0x04000000; /* Z24S8 */
     51		tile->zcomp |= tile->tag->offset;
     52		tile->zcomp |= 0x80000000; /* enable */
     53#ifdef __BIG_ENDIAN
     54		tile->zcomp |= 0x08000000;
     55#endif
     56	}
     57}
     58
     59void
     60nv20_fb_tile_fini(struct nvkm_fb *fb, int i, struct nvkm_fb_tile *tile)
     61{
     62	tile->addr  = 0;
     63	tile->limit = 0;
     64	tile->pitch = 0;
     65	tile->zcomp = 0;
     66	nvkm_mm_free(&fb->tags.mm, &tile->tag);
     67}
     68
     69void
     70nv20_fb_tile_prog(struct nvkm_fb *fb, int i, struct nvkm_fb_tile *tile)
     71{
     72	struct nvkm_device *device = fb->subdev.device;
     73	nvkm_wr32(device, 0x100244 + (i * 0x10), tile->limit);
     74	nvkm_wr32(device, 0x100248 + (i * 0x10), tile->pitch);
     75	nvkm_wr32(device, 0x100240 + (i * 0x10), tile->addr);
     76	nvkm_rd32(device, 0x100240 + (i * 0x10));
     77	nvkm_wr32(device, 0x100300 + (i * 0x04), tile->zcomp);
     78}
     79
     80u32
     81nv20_fb_tags(struct nvkm_fb *fb)
     82{
     83	const u32 tags = nvkm_rd32(fb->subdev.device, 0x100320);
     84	return tags ? tags + 1 : 0;
     85}
     86
     87static const struct nvkm_fb_func
     88nv20_fb = {
     89	.tags = nv20_fb_tags,
     90	.tile.regions = 8,
     91	.tile.init = nv20_fb_tile_init,
     92	.tile.comp = nv20_fb_tile_comp,
     93	.tile.fini = nv20_fb_tile_fini,
     94	.tile.prog = nv20_fb_tile_prog,
     95	.ram_new = nv20_ram_new,
     96};
     97
     98int
     99nv20_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
    100{
    101	return nvkm_fb_new_(&nv20_fb, device, type, inst, pfb);
    102}