Line data    Source code

       1             : /*
       2             :  * Copyright 2013 Advanced Micro Devices, 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: Alex Deucher
      23             :  */
      24             : #include <dev/pci/drm/drmP.h>
      25             : #include "radeon.h"
      26             : #include "radeon_asic.h"
      27             : #include "rv770d.h"
      28             : 
      29             : /**
      30             :  * rv770_copy_dma - copy pages using the DMA engine
      31             :  *
      32             :  * @rdev: radeon_device pointer
      33             :  * @src_offset: src GPU address
      34             :  * @dst_offset: dst GPU address
      35             :  * @num_gpu_pages: number of GPU pages to xfer
      36             :  * @resv: reservation object to sync to
      37             :  *
      38             :  * Copy GPU paging using the DMA engine (r7xx).
      39             :  * Used by the radeon ttm implementation to move pages if
      40             :  * registered as the asic copy callback.
      41             :  */
      42           0 : struct radeon_fence *rv770_copy_dma(struct radeon_device *rdev,
      43             :                                     uint64_t src_offset, uint64_t dst_offset,
      44             :                                     unsigned num_gpu_pages,
      45             :                                     struct reservation_object *resv)
      46             : {
      47           0 :         struct radeon_fence *fence;
      48           0 :         struct radeon_sync sync;
      49           0 :         int ring_index = rdev->asic->copy.dma_ring_index;
      50           0 :         struct radeon_ring *ring = &rdev->ring[ring_index];
      51             :         u32 size_in_dw, cur_size_in_dw;
      52             :         int i, num_loops;
      53             :         int r = 0;
      54             : 
      55           0 :         radeon_sync_create(&sync);
      56             : 
      57           0 :         size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4;
      58           0 :         num_loops = DIV_ROUND_UP(size_in_dw, 0xFFFF);
      59           0 :         r = radeon_ring_lock(rdev, ring, num_loops * 5 + 8);
      60           0 :         if (r) {
      61           0 :                 DRM_ERROR("radeon: moving bo (%d).\n", r);
      62           0 :                 radeon_sync_free(rdev, &sync, NULL);
      63           0 :                 return ERR_PTR(r);
      64             :         }
      65             : 
      66           0 :         radeon_sync_resv(rdev, &sync, resv, false);
      67           0 :         radeon_sync_rings(rdev, &sync, ring->idx);
      68             : 
      69           0 :         for (i = 0; i < num_loops; i++) {
      70             :                 cur_size_in_dw = size_in_dw;
      71           0 :                 if (cur_size_in_dw > 0xFFFF)
      72             :                         cur_size_in_dw = 0xFFFF;
      73           0 :                 size_in_dw -= cur_size_in_dw;
      74           0 :                 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0, 0, cur_size_in_dw));
      75           0 :                 radeon_ring_write(ring, dst_offset & 0xfffffffc);
      76           0 :                 radeon_ring_write(ring, src_offset & 0xfffffffc);
      77           0 :                 radeon_ring_write(ring, upper_32_bits(dst_offset) & 0xff);
      78           0 :                 radeon_ring_write(ring, upper_32_bits(src_offset) & 0xff);
      79           0 :                 src_offset += cur_size_in_dw * 4;
      80           0 :                 dst_offset += cur_size_in_dw * 4;
      81             :         }
      82             : 
      83           0 :         r = radeon_fence_emit(rdev, &fence, ring->idx);
      84           0 :         if (r) {
      85           0 :                 radeon_ring_unlock_undo(rdev, ring);
      86           0 :                 radeon_sync_free(rdev, &sync, NULL);
      87           0 :                 return ERR_PTR(r);
      88             :         }
      89             : 
      90           0 :         radeon_ring_unlock_commit(rdev, ring, false);
      91           0 :         radeon_sync_free(rdev, &sync, fence);
      92             : 
      93           0 :         return fence;
      94           0 : }