LXR linux/drivers/media/platform/sti/delta/delta-mem.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (C) STMicroelectronics SA 2015
   4 * Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
   5 */
   6
   7#include "delta.h"
   8#include "delta-mem.h"
   9
  10int hw_alloc(struct delta_ctx *ctx, u32 size, const char *name,
  11             struct delta_buf *buf)
  12{
  13        struct delta_dev *delta = ctx->dev;
  14        dma_addr_t dma_addr;
  15        void *addr;
  16        unsigned long attrs = DMA_ATTR_WRITE_COMBINE;
  17
  18        addr = dma_alloc_attrs(delta->dev, size, &dma_addr,
  19                               GFP_KERNEL | __GFP_NOWARN, attrs);
  20        if (!addr) {
  21                dev_err(delta->dev,
  22                        "%s hw_alloc:dma_alloc_coherent failed for %s (size=%d)\n",
  23                        ctx->name, name, size);
  24                ctx->sys_errors++;
  25                return -ENOMEM;
  26        }
  27
  28        buf->size = size;
  29        buf->paddr = dma_addr;
  30        buf->vaddr = addr;
  31        buf->name = name;
  32        buf->attrs = attrs;
  33
  34        dev_dbg(delta->dev,
  35                "%s allocate %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n",
  36                ctx->name, size, buf->vaddr, &buf->paddr, buf->name);
  37
  38        return 0;
  39}
  40
  41void hw_free(struct delta_ctx *ctx, struct delta_buf *buf)
  42{
  43        struct delta_dev *delta = ctx->dev;
  44
  45        dev_dbg(delta->dev,
  46                "%s     free %d bytes of HW memory @(virt=0x%p, phy=0x%pad): %s\n",
  47                ctx->name, buf->size, buf->vaddr, &buf->paddr, buf->name);
  48
  49        dma_free_attrs(delta->dev, buf->size,
  50                       buf->vaddr, buf->paddr, buf->attrs);
  51}
  52