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_bo0039.c (3326B)

      1/*
      2 * Copyright 2007 Dave Airlied
      3 * All Rights Reserved.
      4 *
      5 * Permission is hereby granted, free of charge, to any person obtaining a
      6 * copy of this software and associated documentation files (the "Software"),
      7 * to deal in the Software without restriction, including without limitation
      8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      9 * and/or sell copies of the Software, and to permit persons to whom the
     10 * Software is furnished to do so, subject to the following conditions:
     11 *
     12 * The above copyright notice and this permission notice (including the next
     13 * paragraph) shall be included in all copies or substantial portions of the
     14 * Software.
     15 *
     16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22 * OTHER DEALINGS IN THE SOFTWARE.
     23 */
     24/*
     25 * Authors: Dave Airlied <airlied@linux.ie>
     26 *	    Ben Skeggs   <darktama@iinet.net.au>
     27 *	    Jeremy Kolb  <jkolb@brandeis.edu>
     28 */
     29#include "nouveau_bo.h"
     30#include "nouveau_dma.h"
     31#include "nouveau_drv.h"
     32
     33#include <nvif/push006c.h>
     34
     35#include <nvhw/class/cl0039.h>
     36
     37static inline uint32_t
     38nouveau_bo_mem_ctxdma(struct ttm_buffer_object *bo,
     39		      struct nouveau_channel *chan, struct ttm_resource *reg)
     40{
     41	if (reg->mem_type == TTM_PL_TT)
     42		return NvDmaTT;
     43	return chan->vram.handle;
     44}
     45
     46int
     47nv04_bo_move_m2mf(struct nouveau_channel *chan, struct ttm_buffer_object *bo,
     48		  struct ttm_resource *old_reg, struct ttm_resource *new_reg)
     49{
     50	struct nvif_push *push = chan->chan.push;
     51	u32 src_ctxdma = nouveau_bo_mem_ctxdma(bo, chan, old_reg);
     52	u32 src_offset = old_reg->start << PAGE_SHIFT;
     53	u32 dst_ctxdma = nouveau_bo_mem_ctxdma(bo, chan, new_reg);
     54	u32 dst_offset = new_reg->start << PAGE_SHIFT;
     55	u32 page_count = new_reg->num_pages;
     56	int ret;
     57
     58	ret = PUSH_WAIT(push, 3);
     59	if (ret)
     60		return ret;
     61
     62	PUSH_MTHD(push, NV039, SET_CONTEXT_DMA_BUFFER_IN, src_ctxdma,
     63			       SET_CONTEXT_DMA_BUFFER_OUT, dst_ctxdma);
     64
     65	page_count = new_reg->num_pages;
     66	while (page_count) {
     67		int line_count = (page_count > 2047) ? 2047 : page_count;
     68
     69		ret = PUSH_WAIT(push, 11);
     70		if (ret)
     71			return ret;
     72
     73		PUSH_MTHD(push, NV039, OFFSET_IN, src_offset,
     74				       OFFSET_OUT, dst_offset,
     75				       PITCH_IN, PAGE_SIZE,
     76				       PITCH_OUT, PAGE_SIZE,
     77				       LINE_LENGTH_IN, PAGE_SIZE,
     78				       LINE_COUNT, line_count,
     79
     80				       FORMAT,
     81			  NVVAL(NV039, FORMAT, IN, 1) |
     82			  NVVAL(NV039, FORMAT, OUT, 1),
     83
     84				       BUFFER_NOTIFY, NV039_BUFFER_NOTIFY_WRITE_ONLY);
     85
     86		PUSH_MTHD(push, NV039, NO_OPERATION, 0x00000000);
     87
     88		page_count -= line_count;
     89		src_offset += (PAGE_SIZE * line_count);
     90		dst_offset += (PAGE_SIZE * line_count);
     91	}
     92
     93	return 0;
     94}
     95
     96int
     97nv04_bo_move_init(struct nouveau_channel *chan, u32 handle)
     98{
     99	struct nvif_push *push = chan->chan.push;
    100	int ret;
    101
    102	ret = PUSH_WAIT(push, 4);
    103	if (ret)
    104		return ret;
    105
    106	PUSH_MTHD(push, NV039, SET_OBJECT, handle);
    107	PUSH_MTHD(push, NV039, SET_CONTEXT_DMA_NOTIFIES, chan->drm->ntfy.handle);
    108	return 0;
    109}