drm/amdgpu: use the BAR if possible in amdgpu_device_vram_access v2 (c12b84d6) · Commits · 戴 / test

This should speed up debugging VRAM access a lot. v2: add HDP flush/invalidate Signed-off-by:

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+26 −0

Original line number	Diff line number	Diff line
		@@ -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;