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