1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics SA 2015
4 * Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
5 */
6
7#include "delta.h"
8#include "delta-mem.h"
9
10int hw_alloc(struct delta_ctx *ctx, u32 size, const char *name,
11	     struct delta_buf *buf)
12{
13	struct delta_dev *delta = ctx->dev;
14	dma_addr_t dma_addr;
15	void *addr;
16	unsigned long attrs = DMA_ATTR_WRITE_COMBINE;
17
18	addr = dma_alloc_attrs(delta->dev, size, &dma_addr,
19			       GFP_KERNEL | __GFP_NOWARN, attrs);
20	if (!addr) {
21		dev_err(delta->dev,
22			"%s hw_alloc:dma_alloc_coherent failed for %s (size=%d)\n",
23			ctx->name, name, size);
24		ctx->sys_errors++;
25		return -ENOMEM;
26	}
27
28	buf->size = size;
29	buf->paddr = dma_addr;
30	buf->vaddr = addr;
31	buf->name = name;
32	buf->attrs = attrs;
33
34	dev_dbg(delta->dev,
35		"%s allocate %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n",
36		ctx->name, size, buf->vaddr, &buf->paddr, buf->name);
37
38	return 0;
39}
40
41void hw_free(struct delta_ctx *ctx, struct delta_buf *buf)
42{
43	struct delta_dev *delta = ctx->dev;
44
45	dev_dbg(delta->dev,
46		"%s     free %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n",
47		ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name);
48
49	dma_free_attrs(delta->dev, buf->size,
50		       buf->vaddr, buf->paddr, buf->attrs);
51}
52