root/drivers/gpu/drm/radeon/si_dma.c

DEFINITIONS

1. si_dma_is_lockup
2. si_dma_vm_copy_pages
3. si_dma_vm_write_pages
4. si_dma_vm_set_pages
5. si_dma_vm_flush
6. si_copy_dma

   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 
  25 #include "radeon.h"
  26 #include "radeon_asic.h"
  27 #include "radeon_trace.h"
  28 #include "sid.h"
  29 
  30 u32 si_gpu_check_soft_reset(struct radeon_device *rdev);
  31 
  32 /**
  33  * si_dma_is_lockup - Check if the DMA engine is locked up
  34  *
  35  * @rdev: radeon_device pointer
  36  * @ring: radeon_ring structure holding ring information
  37  *
  38  * Check if the async DMA engine is locked up.
  39  * Returns true if the engine appears to be locked up, false if not.
  40  */
  41 bool si_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
  42 {
  43         u32 reset_mask = si_gpu_check_soft_reset(rdev);
  44         u32 mask;
  45 
  46         if (ring->idx == R600_RING_TYPE_DMA_INDEX)
  47                 mask = RADEON_RESET_DMA;
  48         else
  49                 mask = RADEON_RESET_DMA1;
  50 
  51         if (!(reset_mask & mask)) {
  52                 radeon_ring_lockup_update(rdev, ring);
  53                 return false;
  54         }
  55         return radeon_ring_test_lockup(rdev, ring);
  56 }
  57 
  58 /**
  59  * si_dma_vm_copy_pages - update PTEs by copying them from the GART
  60  *
  61  * @rdev: radeon_device pointer
  62  * @ib: indirect buffer to fill with commands
  63  * @pe: addr of the page entry
  64  * @src: src addr where to copy from
  65  * @count: number of page entries to update
  66  *
  67  * Update PTEs by copying them from the GART using the DMA (SI).
  68  */
  69 void si_dma_vm_copy_pages(struct radeon_device *rdev,
  70                           struct radeon_ib *ib,
  71                           uint64_t pe, uint64_t src,
  72                           unsigned count)
  73 {
  74         while (count) {
  75                 unsigned bytes = count * 8;
  76                 if (bytes > 0xFFFF8)
  77                         bytes = 0xFFFF8;
  78 
  79                 ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
  80                                                       1, 0, 0, bytes);
  81                 ib->ptr[ib->length_dw++] = lower_32_bits(pe);
  82                 ib->ptr[ib->length_dw++] = lower_32_bits(src);
  83                 ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
  84                 ib->ptr[ib->length_dw++] = upper_32_bits(src) & 0xff;
  85 
  86                 pe += bytes;
  87                 src += bytes;
  88                 count -= bytes / 8;
  89         }
  90 }
  91 
  92 /**
  93  * si_dma_vm_write_pages - update PTEs by writing them manually
  94  *
  95  * @rdev: radeon_device pointer
  96  * @ib: indirect buffer to fill with commands
  97  * @pe: addr of the page entry
  98  * @addr: dst addr to write into pe
  99  * @count: number of page entries to update
 100  * @incr: increase next addr by incr bytes
 101  * @flags: access flags
 102  *
 103  * Update PTEs by writing them manually using the DMA (SI).
 104  */
 105 void si_dma_vm_write_pages(struct radeon_device *rdev,
 106                            struct radeon_ib *ib,
 107                            uint64_t pe,
 108                            uint64_t addr, unsigned count,
 109                            uint32_t incr, uint32_t flags)
 110 {
 111         uint64_t value;
 112         unsigned ndw;
 113 
 114         while (count) {
 115                 ndw = count * 2;
 116                 if (ndw > 0xFFFFE)
 117                         ndw = 0xFFFFE;
 118 
 119                 /* for non-physically contiguous pages (system) */
 120                 ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, ndw);
 121                 ib->ptr[ib->length_dw++] = pe;
 122                 ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
 123                 for (; ndw > 0; ndw -= 2, --count, pe += 8) {
 124                         if (flags & R600_PTE_SYSTEM) {
 125                                 value = radeon_vm_map_gart(rdev, addr);
 126                         } else if (flags & R600_PTE_VALID) {
 127                                 value = addr;
 128                         } else {
 129                                 value = 0;
 130                         }
 131                         addr += incr;
 132                         value |= flags;
 133                         ib->ptr[ib->length_dw++] = value;
 134                         ib->ptr[ib->length_dw++] = upper_32_bits(value);
 135                 }
 136         }
 137 }
 138 
 139 /**
 140  * si_dma_vm_set_pages - update the page tables using the DMA
 141  *
 142  * @rdev: radeon_device pointer
 143  * @ib: indirect buffer to fill with commands
 144  * @pe: addr of the page entry
 145  * @addr: dst addr to write into pe
 146  * @count: number of page entries to update
 147  * @incr: increase next addr by incr bytes
 148  * @flags: access flags
 149  *
 150  * Update the page tables using the DMA (SI).
 151  */
 152 void si_dma_vm_set_pages(struct radeon_device *rdev,
 153                          struct radeon_ib *ib,
 154                          uint64_t pe,
 155                          uint64_t addr, unsigned count,
 156                          uint32_t incr, uint32_t flags)
 157 {
 158         uint64_t value;
 159         unsigned ndw;
 160 
 161         while (count) {
 162                 ndw = count * 2;
 163                 if (ndw > 0xFFFFE)
 164                         ndw = 0xFFFFE;
 165 
 166                 if (flags & R600_PTE_VALID)
 167                         value = addr;
 168                 else
 169                         value = 0;
 170 
 171                 /* for physically contiguous pages (vram) */
 172                 ib->ptr[ib->length_dw++] = DMA_PTE_PDE_PACKET(ndw);
 173                 ib->ptr[ib->length_dw++] = pe; /* dst addr */
 174                 ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
 175                 ib->ptr[ib->length_dw++] = flags; /* mask */
 176                 ib->ptr[ib->length_dw++] = 0;
 177                 ib->ptr[ib->length_dw++] = value; /* value */
 178                 ib->ptr[ib->length_dw++] = upper_32_bits(value);
 179                 ib->ptr[ib->length_dw++] = incr; /* increment size */
 180                 ib->ptr[ib->length_dw++] = 0;
 181                 pe += ndw * 4;
 182                 addr += (ndw / 2) * incr;
 183                 count -= ndw / 2;
 184         }
 185 }
 186 
 187 void si_dma_vm_flush(struct radeon_device *rdev, struct radeon_ring *ring,
 188                      unsigned vm_id, uint64_t pd_addr)
 189 
 190 {
 191         radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0, 0));
 192         if (vm_id < 8) {
 193                 radeon_ring_write(ring, (0xf << 16) | ((VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm_id << 2)) >> 2));
 194         } else {
 195                 radeon_ring_write(ring, (0xf << 16) | ((VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((vm_id - 8) << 2)) >> 2));
 196         }
 197         radeon_ring_write(ring, pd_addr >> 12);
 198 
 199         /* flush hdp cache */
 200         radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0, 0));
 201         radeon_ring_write(ring, (0xf << 16) | (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2));
 202         radeon_ring_write(ring, 1);
 203 
 204         /* bits 0-7 are the VM contexts0-7 */
 205         radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0, 0));
 206         radeon_ring_write(ring, (0xf << 16) | (VM_INVALIDATE_REQUEST >> 2));
 207         radeon_ring_write(ring, 1 << vm_id);
 208 
 209         /* wait for invalidate to complete */
 210         radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_POLL_REG_MEM, 0, 0, 0, 0));
 211         radeon_ring_write(ring, VM_INVALIDATE_REQUEST);
 212         radeon_ring_write(ring, 0xff << 16); /* retry */
 213         radeon_ring_write(ring, 1 << vm_id); /* mask */
 214         radeon_ring_write(ring, 0); /* value */
 215         radeon_ring_write(ring, (0 << 28) | 0x20); /* func(always) | poll interval */
 216 }
 217 
 218 /**
 219  * si_copy_dma - copy pages using the DMA engine
 220  *
 221  * @rdev: radeon_device pointer
 222  * @src_offset: src GPU address
 223  * @dst_offset: dst GPU address
 224  * @num_gpu_pages: number of GPU pages to xfer
 225  * @resv: reservation object to sync to
 226  *
 227  * Copy GPU paging using the DMA engine (SI).
 228  * Used by the radeon ttm implementation to move pages if
 229  * registered as the asic copy callback.
 230  */
 231 struct radeon_fence *si_copy_dma(struct radeon_device *rdev,
 232                                  uint64_t src_offset, uint64_t dst_offset,
 233                                  unsigned num_gpu_pages,
 234                                  struct dma_resv *resv)
 235 {
 236         struct radeon_fence *fence;
 237         struct radeon_sync sync;
 238         int ring_index = rdev->asic->copy.dma_ring_index;
 239         struct radeon_ring *ring = &rdev->ring[ring_index];
 240         u32 size_in_bytes, cur_size_in_bytes;
 241         int i, num_loops;
 242         int r = 0;
 243 
 244         radeon_sync_create(&sync);
 245 
 246         size_in_bytes = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT);
 247         num_loops = DIV_ROUND_UP(size_in_bytes, 0xfffff);
 248         r = radeon_ring_lock(rdev, ring, num_loops * 5 + 11);
 249         if (r) {
 250                 DRM_ERROR("radeon: moving bo (%d).\n", r);
 251                 radeon_sync_free(rdev, &sync, NULL);
 252                 return ERR_PTR(r);
 253         }
 254 
 255         radeon_sync_resv(rdev, &sync, resv, false);
 256         radeon_sync_rings(rdev, &sync, ring->idx);
 257 
 258         for (i = 0; i < num_loops; i++) {
 259                 cur_size_in_bytes = size_in_bytes;
 260                 if (cur_size_in_bytes > 0xFFFFF)
 261                         cur_size_in_bytes = 0xFFFFF;
 262                 size_in_bytes -= cur_size_in_bytes;
 263                 radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 1, 0, 0, cur_size_in_bytes));
 264                 radeon_ring_write(ring, lower_32_bits(dst_offset));
 265                 radeon_ring_write(ring, lower_32_bits(src_offset));
 266                 radeon_ring_write(ring, upper_32_bits(dst_offset) & 0xff);
 267                 radeon_ring_write(ring, upper_32_bits(src_offset) & 0xff);
 268                 src_offset += cur_size_in_bytes;
 269                 dst_offset += cur_size_in_bytes;
 270         }
 271 
 272         r = radeon_fence_emit(rdev, &fence, ring->idx);
 273         if (r) {
 274                 radeon_ring_unlock_undo(rdev, ring);
 275                 radeon_sync_free(rdev, &sync, NULL);
 276                 return ERR_PTR(r);
 277         }
 278 
 279         radeon_ring_unlock_commit(rdev, ring, false);
 280         radeon_sync_free(rdev, &sync, fence);
 281 
 282         return fence;
 283 }
 284