52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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/*
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* Copyright (C) STMicroelectronics SA 2015
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* Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
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* License terms: GNU General Public License (GPL), version 2
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*/
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#include "delta.h"
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#include "delta-mem.h"
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int hw_alloc(struct delta_ctx *ctx, u32 size, const char *name,
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struct delta_buf *buf)
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{
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struct delta_dev *delta = ctx->dev;
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dma_addr_t dma_addr;
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void *addr;
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unsigned long attrs = DMA_ATTR_WRITE_COMBINE;
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addr = dma_alloc_attrs(delta->dev, size, &dma_addr,
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GFP_KERNEL | __GFP_NOWARN, attrs);
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if (!addr) {
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dev_err(delta->dev,
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"%s hw_alloc:dma_alloc_coherent failed for %s (size=%d)\n",
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ctx->name, name, size);
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ctx->sys_errors++;
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return -ENOMEM;
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}
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buf->size = size;
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buf->paddr = dma_addr;
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buf->vaddr = addr;
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buf->name = name;
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buf->attrs = attrs;
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dev_dbg(delta->dev,
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"%s allocate %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n",
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ctx->name, size, buf->vaddr, &buf->paddr, buf->name);
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return 0;
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}
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void hw_free(struct delta_ctx *ctx, struct delta_buf *buf)
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{
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struct delta_dev *delta = ctx->dev;
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dev_dbg(delta->dev,
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"%s free %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n",
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ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name);
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dma_free_attrs(delta->dev, buf->size,
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buf->vaddr, buf->paddr, buf->attrs);
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}
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