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qcacmn: Hawkeye emulation WAR

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SKBs allocated from higher memory instead of
lower memory range. This is needed for Hawkeye
emulation

Change-Id: Ibeb27c43ee882d772b9166731804faefab2e406e
CRs-Fixed: 2046721
This commit is contained in:
Kris Muthusamy 2017-05-03 18:38:35 -07:00 • committed by snandini
commit ea7dc9339d
1 changed files with 65 additions and 0 deletions
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65
qdf/linux/src/qdf_nbuf.c
View file

@ -183,6 +183,70 @@ qdf_nbuf_free_t nbuf_free_cb;
*
* Return: nbuf or %NULL if no memory
*/
#if defined(QCA_WIFI_QCA8074) && defined (BUILD_X86)
struct sk_buff *__qdf_nbuf_alloc(qdf_device_t osdev, size_t size, int reserve,
int align, int prio)
{
struct sk_buff *skb;
unsigned long offset;
uint32_t lowmem_alloc_tries = 0;
if (align)
size += (align - 1);
realloc:
skb = dev_alloc_skb(size);
if (!skb) {
pr_info("ERROR:NBUF alloc failed\n");
return NULL;
}
/* Hawkeye M2M emulation cannot handle memory addresses below 0x50000040
* Though we are trying to reserve low memory upfront to prevent this,
* we sometimes see SKBs allocated from low memory.
*/
if (virt_to_phys(qdf_nbuf_data(skb) < 0x50000040)) {
lowmem_alloc_tries++;
if (lowmem_alloc_tries > 100) {
qdf_print("%s Failed \n",__func__);
return NULL;
} else {
/* Not freeing to make sure it
* will not get allocated again
*/
goto realloc;
}
}
memset(skb->cb, 0x0, sizeof(skb->cb));
/*
* The default is for netbuf fragments to be interpreted
* as wordstreams rather than bytestreams.
*/
QDF_NBUF_CB_TX_EXTRA_FRAG_WORDSTR_EFRAG(skb) = 1;
QDF_NBUF_CB_TX_EXTRA_FRAG_WORDSTR_NBUF(skb) = 1;
/*
* XXX:how about we reserve first then align
* Align & make sure that the tail & data are adjusted properly
*/
if (align) {
offset = ((unsigned long)skb->data) % align;
if (offset)
skb_reserve(skb, align - offset);
}
/*
* NOTE:alloc doesn't take responsibility if reserve unaligns the data
* pointer
*/
skb_reserve(skb, reserve);
return skb;
}
#else
struct sk_buff *__qdf_nbuf_alloc(qdf_device_t osdev, size_t size, int reserve,
int align, int prio)
{
@ -226,6 +290,7 @@ struct sk_buff *__qdf_nbuf_alloc(qdf_device_t osdev, size_t size, int reserve,
return skb;
}
#endif
EXPORT_SYMBOL(__qdf_nbuf_alloc);
/**