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51 lines
1.3 KiB
51 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) STMicroelectronics SA 2015 |
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* Author: Hugues Fruchet <[email protected]> for STMicroelectronics. |
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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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