git.openwrt.org Git - openwrt/staging/linusw.git/blob

   1 From 56fda5adce0c9b4dc8ff2c7be9a704599e685001 Mon Sep 17 00:00:00 2001
   2 From: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
   3 Date: Wed, 17 Jul 2024 09:33:21 +0100
   4 Subject: [PATCH 1341/1350] dma-buf: system_heap: Allow specifying maximum
   5  allocation order
   6
   7 system_heap.max_order=<uint>
   8
   9 Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
  10 ---
  11  drivers/dma-buf/heaps/system_heap.c | 10 +++++++++-
  12  1 file changed, 9 insertions(+), 1 deletion(-)
  13
  14 --- a/drivers/dma-buf/heaps/system_heap.c
  15 +++ b/drivers/dma-buf/heaps/system_heap.c
  16 @@ -54,6 +54,11 @@ static gfp_t order_flags[] = {HIGH_ORDER
  17  static const unsigned int orders[] = {8, 4, 0};
  18  #define NUM_ORDERS ARRAY_SIZE(orders)
  19
  20 +static unsigned int module_max_order = orders[0];
  21 +
  22 +module_param_named(max_order, module_max_order, uint, 0400);
  23 +MODULE_PARM_DESC(max_order, "Maximum allocation order override.");
  24 +
  25  static struct sg_table *dup_sg_table(struct sg_table *table)
  26  {
  27         struct sg_table *new_table;
  28 @@ -339,7 +344,7 @@ static struct dma_buf *system_heap_alloc
  29         struct system_heap_buffer *buffer;
  30         DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
  31         unsigned long size_remaining = len;
  32 -       unsigned int max_order = orders[0];
  33 +       unsigned int max_order = module_max_order;
  34         struct dma_buf *dmabuf;
  35         struct sg_table *table;
  36         struct scatterlist *sg;
  37 @@ -433,6 +438,9 @@ static int system_heap_create(void)
  38         if (IS_ERR(sys_heap))
  39                 return PTR_ERR(sys_heap);
  40
  41 +       if (module_max_order > orders[0])
  42 +               module_max_order = orders[0];
  43 +
  44         return 0;
  45  }
  46  module_init(system_heap_create);