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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) STMicroelectronics SA 20154 * Authors: Yannick Fertre <yannick.fertre@st.com>5 * Hugues Fruchet <hugues.fruchet@st.com>6 */7 8#include "hva.h"9#include "hva-mem.h"10 11int hva_mem_alloc(struct hva_ctx *ctx, u32 size, const char *name,12 struct hva_buffer **buf)13{14 struct device *dev = ctx_to_dev(ctx);15 struct hva_buffer *b;16 dma_addr_t paddr;17 void *base;18 19 b = devm_kzalloc(dev, sizeof(*b), GFP_KERNEL);20 if (!b) {21 ctx->sys_errors++;22 return -ENOMEM;23 }24 25 base = dma_alloc_attrs(dev, size, &paddr, GFP_KERNEL,26 DMA_ATTR_WRITE_COMBINE);27 if (!base) {28 dev_err(dev, "%s %s : dma_alloc_attrs failed for %s (size=%d)\n",29 ctx->name, __func__, name, size);30 ctx->sys_errors++;31 devm_kfree(dev, b);32 return -ENOMEM;33 }34 35 b->size = size;36 b->paddr = paddr;37 b->vaddr = base;38 b->name = name;39 40 dev_dbg(dev,41 "%s allocate %d bytes of HW memory @(virt=%p, phy=%pad): %s\n",42 ctx->name, size, b->vaddr, &b->paddr, b->name);43 44 /* return hva buffer to user */45 *buf = b;46 47 return 0;48}49 50void hva_mem_free(struct hva_ctx *ctx, struct hva_buffer *buf)51{52 struct device *dev = ctx_to_dev(ctx);53 54 dev_dbg(dev,55 "%s free %d bytes of HW memory @(virt=%p, phy=%pad): %s\n",56 ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name);57 58 dma_free_attrs(dev, buf->size, buf->vaddr, buf->paddr,59 DMA_ATTR_WRITE_COMBINE);60 61 devm_kfree(dev, buf);62}63