// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) STMicroelectronics SA 2015
 * Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
 */

#include "delta.h"
#include "delta-mem.h"

int hw_alloc(struct delta_ctx *ctx, u32 size, const char *name,
             struct delta_buf *buf)
{
        struct delta_dev *delta = ctx->dev;
        dma_addr_t dma_addr;
        void *addr;
        unsigned long attrs = DMA_ATTR_WRITE_COMBINE;

        addr = dma_alloc_attrs(delta->dev, size, &dma_addr,
                               GFP_KERNEL | __GFP_NOWARN, attrs);
        if (!addr) {
                dev_err(delta->dev,
                        "%s hw_alloc:dma_alloc_coherent failed for %s (size=%d)\n",
                        ctx->name, name, size);
                ctx->sys_errors++;
                return -ENOMEM;
        }

        buf->size = size;
        buf->paddr = dma_addr;
        buf->vaddr = addr;
        buf->name = name;
        buf->attrs = attrs;

        dev_dbg(delta->dev,
                "%s allocate %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n",
                ctx->name, size, buf->vaddr, &buf->paddr, buf->name);

        return 0;
}

void hw_free(struct delta_ctx *ctx, struct delta_buf *buf)
{
        struct delta_dev *delta = ctx->dev;

        dev_dbg(delta->dev,
                "%s     free %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n",
                ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name);

        dma_free_attrs(delta->dev, buf->size,
                       buf->vaddr, buf->paddr, buf->attrs);
}