1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) STMicroelectronics SA 2015
4 * Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
10 int hw_alloc(struct delta_ctx *ctx, u32 size, const char *name,
11 struct delta_buf *buf)
13 struct delta_dev *delta = ctx->dev;
16 unsigned long attrs = DMA_ATTR_WRITE_COMBINE;
18 addr = dma_alloc_attrs(delta->dev, size, &dma_addr,
19 GFP_KERNEL | __GFP_NOWARN, attrs);
22 "%s hw_alloc:dma_alloc_coherent failed for %s (size=%d)\n",
23 ctx->name, name, size);
29 buf->paddr = dma_addr;
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);
41 void hw_free(struct delta_ctx *ctx, struct delta_buf *buf)
43 struct delta_dev *delta = ctx->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);
49 dma_free_attrs(delta->dev, buf->size,
50 buf->vaddr, buf->paddr, buf->attrs);