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
  10 int 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
  41 void 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 }