/*
* Copyright 2013 Advanced Micro Devices , Inc .
*
* Permission is hereby granted , free of charge , to any person obtaining a
* copy of this software and associated documentation files ( the " Software " ) ,
* to deal in the Software without restriction , including without limitation
* the rights to use , copy , modify , merge , publish , distribute , sublicense ,
* and / or sell copies of the Software , and to permit persons to whom the
* Software is furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL
* THE COPYRIGHT HOLDER ( S ) OR AUTHOR ( S ) BE LIABLE FOR ANY CLAIM , DAMAGES OR
* OTHER LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE ,
* ARISING FROM , OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE .
*
* Authors : Alex Deucher
*/
#include "radeon.h"
#include "radeon_asic.h"
#include "rv770d.h"
/**
* rv770_copy_dma - copy pages using the DMA engine
*
* @ rdev : radeon_device pointer
* @ src_offset : src GPU address
* @ dst_offset : dst GPU address
* @ num_gpu_pages : number of GPU pages to xfer
* @ resv : reservation object to sync to
*
* Copy GPU paging using the DMA engine ( r7xx ) .
* Used by the radeon ttm implementation to move pages if
* registered as the asic copy callback .
*/
struct radeon_fence *rv770_copy_dma(struct radeon_device *rdev,
uint64_t src_offset, uint64_t dst_offset,
unsigned num_gpu_pages,
struct dma_resv *resv)
{
struct radeon_fence *fence;
struct radeon_sync sync;
int ring_index = rdev->asic->copy.dma_ring_index;
struct radeon_ring *ring = &rdev->ring[ring_index];
u32 size_in_dw, cur_size_in_dw;
int i, num_loops;
int r = 0 ;
radeon_sync_create(&sync);
size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4 ;
num_loops = DIV_ROUND_UP(size_in_dw, 0 xFFFF);
r = radeon_ring_lock(rdev, ring, num_loops * 5 + 8 );
if (r) {
DRM_ERROR("radeon: moving bo (%d).\n" , r);
radeon_sync_free(rdev, &sync, NULL);
return ERR_PTR(r);
}
radeon_sync_resv(rdev, &sync, resv, false );
radeon_sync_rings(rdev, &sync, ring->idx);
for (i = 0 ; i < num_loops; i++) {
cur_size_in_dw = size_in_dw;
if (cur_size_in_dw > 0 xFFFF)
cur_size_in_dw = 0 xFFFF;
size_in_dw -= cur_size_in_dw;
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0 , 0 , cur_size_in_dw));
radeon_ring_write(ring, dst_offset & 0 xfffffffc);
radeon_ring_write(ring, src_offset & 0 xfffffffc);
radeon_ring_write(ring, upper_32_bits(dst_offset) & 0 xff);
radeon_ring_write(ring, upper_32_bits(src_offset) & 0 xff);
src_offset += cur_size_in_dw * 4 ;
dst_offset += cur_size_in_dw * 4 ;
}
r = radeon_fence_emit(rdev, &fence, ring->idx);
if (r) {
radeon_ring_unlock_undo(rdev, ring);
radeon_sync_free(rdev, &sync, NULL);
return ERR_PTR(r);
}
radeon_ring_unlock_commit(rdev, ring, false );
radeon_sync_free(rdev, &sync, fence);
return fence;
}
Messung V0.5 in Prozent C=99 H=93 G=95
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-09-28)
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