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qcacmn: New Alloc API for DS

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Requirement:
In skb recycler, if recyler module allocates the buffers
already used by DS module to DS, then memzero, shinfo
reset can be avoided, since the DS packets were not
processed by SW (host).
Hence, we will achieve good KPI with less CPU
utilization.

Fix:
Implemented an new qdf wrapper API qdf_nbuf_alloc_ppe_ds
in wifi driver, which in turn invokes
__netdev_alloc_skb_no_skb_reset API to linux module.
With the use of new netdev_alloc API shinfo reset
will be avoided for DS used buffers alone.
Skb recycler changes are delivered already via
4360331

Change-Id: I3fe8dc07ca12c01136eaee4fcdb1ff6036f80f74
CRs-Fixed: 3350807
This commit is contained in:
Nanda Krishnan
2022-12-01 17:26:50 +05:30
committed by Madan Koyyalamudi
parent 1eafc7e4d9
commit 97f88fb874
3 changed files with 68 additions and 0 deletions
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41
qdf/linux/src/qdf_nbuf.c
View File

@@ -3928,6 +3928,47 @@ qdf_nbuf_dev_kfree_list_debug(__qdf_nbuf_queue_head_t *nbuf_queue_head,
qdf_export_symbol(qdf_nbuf_dev_kfree_list_debug);
#endif /* NBUF_MEMORY_DEBUG */
#if defined(QCA_DP_NBUF_FAST_PPEDS)
struct sk_buff *__qdf_nbuf_alloc_ppe_ds(qdf_device_t osdev, size_t size,
const char *func, uint32_t line)
{
struct sk_buff *skb;
int flags = GFP_KERNEL;
if (in_interrupt() || irqs_disabled() || in_atomic()) {
flags = GFP_ATOMIC;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)
/*
* Observed that kcompactd burns out CPU to make order-3
* page.__netdev_alloc_skb has 4k page fallback option
* just in case of
* failing high order page allocation so we don't need
* to be hard. Make kcompactd rest in piece.
*/
flags = flags & ~__GFP_KSWAPD_RECLAIM;
#endif
}
skb = __netdev_alloc_skb_no_skb_reset(NULL, size, flags);
if (qdf_likely(is_initial_mem_debug_disabled)) {
if (qdf_likely(skb))
qdf_nbuf_count_inc(skb);
} else {
if (qdf_likely(skb)) {
qdf_nbuf_count_inc(skb);
qdf_net_buf_debug_add_node(skb, size, func, line);
qdf_nbuf_history_add(skb, func, line,
QDF_NBUF_ALLOC);
} else {
qdf_nbuf_history_add(skb, func, line,
QDF_NBUF_ALLOC_FAILURE);
}
}
return skb;
}
qdf_export_symbol(__qdf_nbuf_alloc_ppe_ds);
#endif
#if defined(FEATURE_TSO)
/**