diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 5d24b1436b9f..31fe28e27430 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -187,6 +187,32 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos, uint32_t hi = ~0; uint64_t last; + +#ifdef CONFIG_64BIT + last = min(pos + size, adev->gmc.visible_vram_size); + if (last > pos) { + void __iomem *addr = adev->mman.aper_base_kaddr + pos; + size_t count = last - pos; + + if (write) { + memcpy_toio(addr, buf, count); + mb(); + amdgpu_asic_flush_hdp(adev, NULL); + } else { + amdgpu_asic_invalidate_hdp(adev, NULL); + mb(); + memcpy_fromio(buf, addr, count); + } + + if (count == size) + return; + + pos += count; + buf += count / 4; + size -= count; + } +#endif + spin_lock_irqsave(&adev->mmio_idx_lock, flags); for (last = pos + size; pos < last; pos += 4) { uint32_t tmp = pos >> 31; |