1 /* Copyright 2017 NXP Semiconductor, Inc.
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31 #include <linux/dma-mapping.h>
35 * Initialize a devices private memory region
37 int qbman_init_private_mem(struct device *dev, int idx, dma_addr_t *addr,
41 struct device_node *mem_node;
44 ret = of_reserved_mem_device_init_by_idx(dev, dev->of_node, idx);
47 "of_reserved_mem_device_init_by_idx(%d) failed 0x%x\n",
51 mem_node = of_parse_phandle(dev->of_node, "memory-region", 0);
53 ret = of_property_read_u64(mem_node, "size", &size64);
55 dev_err(dev, "of_address_to_resource fails 0x%x\n",
61 dev_err(dev, "No memory-region found for index %d\n", idx);
65 if (!dma_zalloc_coherent(dev, *size, addr, 0)) {
66 dev_err(dev, "DMA Alloc memory failed\n");
71 * Disassociate the reserved memory area from the device
72 * because a device can only have one DMA memory area. This
73 * should be fine since the memory is allocated and initialized
74 * and only ever accessed by the QBMan device from now on
76 of_reserved_mem_device_release(dev);