drm/radeon: separate DMA code

Similar to separating the UVD code, just put the DMA
functions into separate files.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 190 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen_dma.c b/drivers/gpu/drm/radeon/evergreen_dma.c
new file mode 100644
index 000000000000..6a0656d00ed0
--- /dev/null
+++ b/drivers/gpu/drm/radeon/evergreen_dma.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright 2010 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 "evergreend.h"
+
+u32 evergreen_gpu_check_soft_reset(struct radeon_device *rdev);
+
+/**
+ * evergreen_dma_fence_ring_emit - emit a fence on the DMA ring
+ *
+ * @rdev: radeon_device pointer
+ * @fence: radeon fence object
+ *
+ * Add a DMA fence packet to the ring to write
+ * the fence seq number and DMA trap packet to generate
+ * an interrupt if needed (evergreen-SI).
+ */
+void evergreen_dma_fence_ring_emit(struct radeon_device *rdev,
+                                   struct radeon_fence *fence)
+{
+        struct radeon_ring *ring = &rdev->ring[fence->ring];
+        u64 addr = rdev->fence_drv[fence->ring].gpu_addr;
+        /* write the fence */
+        radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0));
+        radeon_ring_write(ring, addr & 0xfffffffc);
+        radeon_ring_write(ring, (upper_32_bits(addr) & 0xff));
+        radeon_ring_write(ring, fence->seq);
+        /* generate an interrupt */
+        radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_TRAP, 0, 0));
+        /* flush HDP */
+        radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0));
+        radeon_ring_write(ring, (0xf << 16) | (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2));
+        radeon_ring_write(ring, 1);
+}
+
+/**
+ * evergreen_dma_ring_ib_execute - schedule an IB on the DMA engine
+ *
+ * @rdev: radeon_device pointer
+ * @ib: IB object to schedule
+ *
+ * Schedule an IB in the DMA ring (evergreen).
+ */
+void evergreen_dma_ring_ib_execute(struct radeon_device *rdev,
+                                   struct radeon_ib *ib)
+{
+        struct radeon_ring *ring = &rdev->ring[ib->ring];
+
+        if (rdev->wb.enabled) {
+                u32 next_rptr = ring->wptr + 4;
+                while ((next_rptr & 7) != 5)
+                        next_rptr++;
+                next_rptr += 3;
+                radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 1));
+                radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc);
+                radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0xff);
+                radeon_ring_write(ring, next_rptr);
+        }
+
+        /* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
+         * Pad as necessary with NOPs.
+         */
+        while ((ring->wptr & 7) != 5)
+                radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0, 0));
+        radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_INDIRECT_BUFFER, 0, 0));
+        radeon_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0));
+        radeon_ring_write(ring, (ib->length_dw << 12) | (upper_32_bits(ib->gpu_addr) & 0xFF));
+
+}
+
+/**
+ * evergreen_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
+ * @fence: radeon fence object
+ *
+ * Copy GPU paging using the DMA engine (evergreen-cayman).
+ * Used by the radeon ttm implementation to move pages if
+ * registered as the asic copy callback.
+ */
+int evergreen_copy_dma(struct radeon_device *rdev,
+                       uint64_t src_offset, uint64_t dst_offset,
+                       unsigned num_gpu_pages,
+                       struct radeon_fence **fence)
+{
+        struct radeon_semaphore *sem = NULL;
+        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;
+
+        r = radeon_semaphore_create(rdev, &sem);
+        if (r) {
+                DRM_ERROR("radeon: moving bo (%d).\n", r);
+                return r;
+        }
+
+        size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4;
+        num_loops = DIV_ROUND_UP(size_in_dw, 0xfffff);
+        r = radeon_ring_lock(rdev, ring, num_loops * 5 + 11);
+        if (r) {
+                DRM_ERROR("radeon: moving bo (%d).\n", r);
+                radeon_semaphore_free(rdev, &sem, NULL);
+                return r;
+        }
+
+        if (radeon_fence_need_sync(*fence, ring->idx)) {
+                radeon_semaphore_sync_rings(rdev, sem, (*fence)->ring,
+                                            ring->idx);
+                radeon_fence_note_sync(*fence, ring->idx);
+        } else {
+                radeon_semaphore_free(rdev, &sem, NULL);
+        }
+
+        for (i = 0; i < num_loops; i++) {
+                cur_size_in_dw = size_in_dw;
+                if (cur_size_in_dw > 0xFFFFF)
+                        cur_size_in_dw = 0xFFFFF;
+                size_in_dw -= cur_size_in_dw;
+                radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 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);
+                return r;
+        }
+
+        radeon_ring_unlock_commit(rdev, ring);
+        radeon_semaphore_free(rdev, &sem, *fence);
+
+        return r;
+}
+
+/**
+ * evergreen_dma_is_lockup - Check if the DMA engine is locked up
+ *
+ * @rdev: radeon_device pointer
+ * @ring: radeon_ring structure holding ring information
+ *
+ * Check if the async DMA engine is locked up.
+ * Returns true if the engine appears to be locked up, false if not.
+ */
+bool evergreen_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
+{
+        u32 reset_mask = evergreen_gpu_check_soft_reset(rdev);
+
+        if (!(reset_mask & RADEON_RESET_DMA)) {
+                radeon_ring_lockup_update(ring);
+                return false;
+        }
+        /* force ring activities */
+        radeon_ring_force_activity(rdev, ring);
+        return radeon_ring_test_lockup(rdev, ring);
+}
+
+