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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) STMicroelectronics SA 20154 * 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