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62 lines
1.4 KiB
62 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) STMicroelectronics SA 2015 |
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* Authors: Yannick Fertre <[email protected]> |
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* Hugues Fruchet <[email protected]> |
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*/ |
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#include "hva.h" |
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#include "hva-mem.h" |
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int hva_mem_alloc(struct hva_ctx *ctx, u32 size, const char *name, |
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struct hva_buffer **buf) |
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{ |
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struct device *dev = ctx_to_dev(ctx); |
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struct hva_buffer *b; |
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dma_addr_t paddr; |
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void *base; |
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b = devm_kzalloc(dev, sizeof(*b), GFP_KERNEL); |
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if (!b) { |
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ctx->sys_errors++; |
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return -ENOMEM; |
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} |
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base = dma_alloc_attrs(dev, size, &paddr, GFP_KERNEL, |
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DMA_ATTR_WRITE_COMBINE); |
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if (!base) { |
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dev_err(dev, "%s %s : dma_alloc_attrs failed for %s (size=%d)\n", |
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ctx->name, __func__, name, size); |
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ctx->sys_errors++; |
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devm_kfree(dev, b); |
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return -ENOMEM; |
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} |
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b->size = size; |
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b->paddr = paddr; |
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b->vaddr = base; |
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b->name = name; |
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dev_dbg(dev, |
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"%s allocate %d bytes of HW memory @(virt=%p, phy=%pad): %s\n", |
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ctx->name, size, b->vaddr, &b->paddr, b->name); |
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/* return hva buffer to user */ |
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*buf = b; |
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return 0; |
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} |
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void hva_mem_free(struct hva_ctx *ctx, struct hva_buffer *buf) |
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{ |
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struct device *dev = ctx_to_dev(ctx); |
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dev_dbg(dev, |
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"%s free %d bytes of HW memory @(virt=%p, phy=%pad): %s\n", |
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ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name); |
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dma_free_attrs(dev, buf->size, buf->vaddr, buf->paddr, |
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DMA_ATTR_WRITE_COMBINE); |
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devm_kfree(dev, buf); |
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}
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