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

nouveau_bo90b5.c (2321B)

      1/*
      2 * Copyright 2020 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#include "nouveau_bo.h"
     23#include "nouveau_dma.h"
     24#include "nouveau_mem.h"
     25
     26#include <nvif/push906f.h>
     27
     28/*XXX: Fixup class to be compatible with NVIDIA's, which will allow sharing
     29 *     code with KeplerDmaCopyA.
     30 */
     31
     32int
     33nvc0_bo_move_copy(struct nouveau_channel *chan, struct ttm_buffer_object *bo,
     34		  struct ttm_resource *old_reg, struct ttm_resource *new_reg)
     35{
     36	struct nouveau_mem *mem = nouveau_mem(old_reg);
     37	struct nvif_push *push = chan->chan.push;
     38	u64 src_offset = mem->vma[0].addr;
     39	u64 dst_offset = mem->vma[1].addr;
     40	u32 page_count = new_reg->num_pages;
     41	int ret;
     42
     43	page_count = new_reg->num_pages;
     44	while (page_count) {
     45		int line_count = (page_count > 8191) ? 8191 : page_count;
     46
     47		ret = PUSH_WAIT(push, 10);
     48		if (ret)
     49			return ret;
     50
     51		PUSH_NVSQ(push, NV90B5, 0x030c, upper_32_bits(src_offset),
     52					0x0310, lower_32_bits(src_offset),
     53					0x0314, upper_32_bits(dst_offset),
     54					0x0318, lower_32_bits(dst_offset),
     55					0x031c, PAGE_SIZE,
     56					0x0320, PAGE_SIZE,
     57					0x0324, PAGE_SIZE,
     58					0x0328, line_count);
     59		PUSH_NVIM(push, NV90B5, 0x0300, 0x0110);
     60
     61		page_count -= line_count;
     62		src_offset += (PAGE_SIZE * line_count);
     63		dst_offset += (PAGE_SIZE * line_count);
     64	}
     65
     66	return 0;
     67}