Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / radeon / rv770_dma.c

diff --git a/kernel/drivers/gpu/drm/radeon/rv770_dma.c b/kernel/drivers/gpu/drm/radeon/rv770_dma.c
new file mode 100644 (file)
index 0000000..acff6e0
--- /dev/null
+++ b/kernel/drivers/gpu/drm/radeon/rv770_dma.c
@@ -0,0 +1,94 @@
+/*
+ * 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 <drm/drmP.h>
+#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 reservation_object *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, 0xFFFF);
+       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 > 0xFFFF)
+                       cur_size_in_dw = 0xFFFF;
+               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 & 0xfffffffc);
+               radeon_ring_write(ring, src_offset & 0xfffffffc);
+               radeon_ring_write(ring, upper_32_bits(dst_offset) & 0xff);
+               radeon_ring_write(ring, upper_32_bits(src_offset) & 0xff);
+               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;
+}