LXR linux/drivers/gpu/drm/radeon/evergreen

   1/*
   2 * Copyright 2010 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
  25#include "radeon.h"
  26#include "radeon_asic.h"
  27#include "evergreen.h"
  28#include "evergreend.h"
  29
  30/**
  31 * evergreen_dma_fence_ring_emit - emit a fence on the DMA ring
  32 *
  33 * @rdev: radeon_device pointer
  34 * @fence: radeon fence object
  35 *
  36 * Add a DMA fence packet to the ring to write
  37 * the fence seq number and DMA trap packet to generate
  38 * an interrupt if needed (evergreen-SI).
  39 */
  40void evergreen_dma_fence_ring_emit(struct radeon_device *rdev,
  41                                   struct radeon_fence *fence)
  42{
  43        struct radeon_ring *ring = &rdev->ring[fence->ring];
  44        u64 addr = rdev->fence_drv[fence->ring].gpu_addr;
  45        /* write the fence */
  46        radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0));
  47        radeon_ring_write(ring, addr & 0xfffffffc);
  48        radeon_ring_write(ring, (upper_32_bits(addr) & 0xff));
  49        radeon_ring_write(ring, fence->seq);
  50        /* generate an interrupt */
  51        radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_TRAP, 0, 0));
  52        /* flush HDP */
  53        radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0));
  54        radeon_ring_write(ring, (0xf << 16) | (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2));
  55        radeon_ring_write(ring, 1);
  56}
  57
  58/**
  59 * evergreen_dma_ring_ib_execute - schedule an IB on the DMA engine
  60 *
  61 * @rdev: radeon_device pointer
  62 * @ib: IB object to schedule
  63 *
  64 * Schedule an IB in the DMA ring (evergreen).
  65 */
  66void evergreen_dma_ring_ib_execute(struct radeon_device *rdev,
  67                                   struct radeon_ib *ib)
  68{
  69        struct radeon_ring *ring = &rdev->ring[ib->ring];
  70
  71        if (rdev->wb.enabled) {
  72                u32 next_rptr = ring->wptr + 4;
  73                while ((next_rptr & 7) != 5)
  74                        next_rptr++;
  75                next_rptr += 3;
  76                radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 1));
  77                radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc);
  78                radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0xff);
  79                radeon_ring_write(ring, next_rptr);
  80        }
  81
  82        /* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
  83         * Pad as necessary with NOPs.
  84         */
  85        while ((ring->wptr & 7) != 5)
  86                radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0, 0));
  87        radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_INDIRECT_BUFFER, 0, 0));
  88        radeon_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0));
  89        radeon_ring_write(ring, (ib->length_dw << 12) | (upper_32_bits(ib->gpu_addr) & 0xFF));
  90
  91}
  92
  93/**
  94 * evergreen_copy_dma - copy pages using the DMA engine
  95 *
  96 * @rdev: radeon_device pointer
  97 * @src_offset: src GPU address
  98 * @dst_offset: dst GPU address
  99 * @num_gpu_pages: number of GPU pages to xfer
 100 * @resv: reservation object with embedded fence
 101 *
 102 * Copy GPU paging using the DMA engine (evergreen-cayman).
 103 * Used by the radeon ttm implementation to move pages if
 104 * registered as the asic copy callback.
 105 */
 106struct radeon_fence *evergreen_copy_dma(struct radeon_device *rdev,
 107                                        uint64_t src_offset,
 108                                        uint64_t dst_offset,
 109                                        unsigned num_gpu_pages,
 110                                        struct dma_resv *resv)
 111{
 112        struct radeon_fence *fence;
 113        struct radeon_sync sync;
 114        int ring_index = rdev->asic->copy.dma_ring_index;
 115        struct radeon_ring *ring = &rdev->ring[ring_index];
 116        u32 size_in_dw, cur_size_in_dw;
 117        int i, num_loops;
 118        int r = 0;
 119
 120        radeon_sync_create(&sync);
 121
 122        size_in_dw = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT) / 4;
 123        num_loops = DIV_ROUND_UP(size_in_dw, 0xfffff);
 124        r = radeon_ring_lock(rdev, ring, num_loops * 5 + 11);
 125        if (r) {
 126                DRM_ERROR("radeon: moving bo (%d).\n", r);
 127                radeon_sync_free(rdev, &sync, NULL);
 128                return ERR_PTR(r);
 129        }
 130
 131        radeon_sync_resv(rdev, &sync, resv, false);
 132        radeon_sync_rings(rdev, &sync, ring->idx);
 133
 134        for (i = 0; i < num_loops; i++) {
 135                cur_size_in_dw = size_in_dw;
 136                if (cur_size_in_dw > 0xFFFFF)
 137                        cur_size_in_dw = 0xFFFFF;
 138                size_in_dw -= cur_size_in_dw;
 139                radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0, cur_size_in_dw));
 140                radeon_ring_write(ring, dst_offset & 0xfffffffc);
 141                radeon_ring_write(ring, src_offset & 0xfffffffc);
 142                radeon_ring_write(ring, upper_32_bits(dst_offset) & 0xff);
 143                radeon_ring_write(ring, upper_32_bits(src_offset) & 0xff);
 144                src_offset += cur_size_in_dw * 4;
 145                dst_offset += cur_size_in_dw * 4;
 146        }
 147
 148        r = radeon_fence_emit(rdev, &fence, ring->idx);
 149        if (r) {
 150                radeon_ring_unlock_undo(rdev, ring);
 151                radeon_sync_free(rdev, &sync, NULL);
 152                return ERR_PTR(r);
 153        }
 154
 155        radeon_ring_unlock_commit(rdev, ring, false);
 156        radeon_sync_free(rdev, &sync, fence);
 157
 158        return fence;
 159}
 160
 161/**
 162 * evergreen_dma_is_lockup - Check if the DMA engine is locked up
 163 *
 164 * @rdev: radeon_device pointer
 165 * @ring: radeon_ring structure holding ring information
 166 *
 167 * Check if the async DMA engine is locked up.
 168 * Returns true if the engine appears to be locked up, false if not.
 169 */
 170bool evergreen_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
 171{
 172        u32 reset_mask = evergreen_gpu_check_soft_reset(rdev);
 173
 174        if (!(reset_mask & RADEON_RESET_DMA)) {
 175                radeon_ring_lockup_update(rdev, ring);
 176                return false;
 177        }
 178        return radeon_ring_test_lockup(rdev, ring);
 179}
 180
 181
 182