1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c
new file mode 100644
index 000000000000..4d1d4994ea3f
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_lsdma.c
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2022 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.
+ *
+ */
+
+#include "amdgpu.h"
+#include "amdgpu_lsdma.h"
+
+#define AMDGPU_LSDMA_MAX_SIZE	0x2000000ULL
+
+int amdgpu_lsdma_wait_for(struct amdgpu_device *adev,
+			  uint32_t reg_index, uint32_t reg_val,
+			  uint32_t mask)
+{
+	uint32_t val;
+	int i;
+
+	for (i = 0; i < adev->usec_timeout; i++) {
+		val = RREG32(reg_index);
+		if ((val & mask) == reg_val)
+			return 0;
+		udelay(1);
+	}
+
+	return -ETIME;
+}
+
+int amdgpu_lsdma_copy_mem(struct amdgpu_device *adev,
+			  uint64_t src_addr,
+			  uint64_t dst_addr,
+			  uint64_t mem_size)
+{
+	int ret;
+
+	if (mem_size == 0)
+		return -EINVAL;
+
+	while (mem_size > 0) {
+		uint64_t current_copy_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
+
+		ret = adev->lsdma.funcs->copy_mem(adev, src_addr, dst_addr, current_copy_size);
+		if (ret)
+			return ret;
+		src_addr += current_copy_size;
+		dst_addr += current_copy_size;
+		mem_size -= current_copy_size;
+	}
+
+	return 0;
+}
+
+int amdgpu_lsdma_fill_mem(struct amdgpu_device *adev,
+			  uint64_t dst_addr,
+			  uint32_t data,
+			  uint64_t mem_size)
+{
+	int ret;
+
+	if (mem_size == 0)
+		return -EINVAL;
+
+	while (mem_size > 0) {
+		uint64_t current_fill_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
+
+		ret = adev->lsdma.funcs->fill_mem(adev, dst_addr, data, current_fill_size);
+		if (ret)
+			return ret;
+		dst_addr += current_fill_size;
+		mem_size -= current_fill_size;
+	}
+
+	return 0;
+}