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qcacmn: Add RX prealloc pool for replenishing RX buffers

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Add and initialize a preallocated pool of buffers which can
be used to replenish RX buffers. During replenish, the buffers
from the pool are used instead of allocating/mapping a new buffer
in the softirq context. This preallocated pool will be refilled
in thread context.

Change-Id: Idf3bd7d25c5d57ddba105ccd8fab672c26a184f1
CRs-Fixed: 2869345
This commit is contained in:
Karthik Kantamneni
2021-01-19 11:41:00 +05:30
committed by snandini
parent 71e3244d46
commit 595bc84a39
7 changed files with 305 additions and 13 deletions
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49
dp/wifi3.0/dp_rx_buffer_pool.h
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2020 The Linux Foundation. All rights reserved.
* Copyright (c) 2020-2021 The Linux Foundation. All rights reserved.
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted, provided that the
@@ -83,6 +83,32 @@ void dp_rx_buffer_pool_nbuf_free(struct dp_soc *soc, qdf_nbuf_t nbuf,
qdf_nbuf_t dp_rx_buffer_pool_nbuf_alloc(struct dp_soc *soc, uint32_t mac_id,
struct rx_desc_pool *rx_desc_pool,
uint32_t num_available_buffers);
/**
* dp_rx_buffer_pool_nbuf_map() - Map nbuff for buffer replenish
* @soc: SoC handle
* @rx_desc_pool: RX descriptor pool
* @nbuf_frag_info_t: nbuf frag info
*
* Return: nbuf
*/
QDF_STATUS
dp_rx_buffer_pool_nbuf_map(struct dp_soc *soc,
struct rx_desc_pool *rx_desc_pool,
struct dp_rx_nbuf_frag_info *nbuf_frag_info_t);
/**
* dp_rx_schedule_refill_thread() - Schedule RX refill thread to enqueue
* buffers in refill pool
* @soc: SoC handle
*
*/
static inline void dp_rx_schedule_refill_thread(struct dp_soc *soc)
{
if (soc->cdp_soc.ol_ops->dp_rx_sched_refill_thread)
soc->cdp_soc.ol_ops->dp_rx_sched_refill_thread(dp_soc_to_cdp_soc_t(soc));
}
#else
/**
* dp_rx_buffer_pool_init() - Initialize emergency buffer pool
@@ -159,5 +185,26 @@ dp_rx_buffer_pool_nbuf_alloc(struct dp_soc *soc, uint32_t mac_id,
RX_BUFFER_RESERVATION,
rx_desc_pool->buf_alignment, FALSE);
}
/**
* dp_rx_buffer_pool_nbuf_map() - Map nbuff for buffer replenish
* @soc: SoC handle
* @rx_desc_pool: RX descriptor pool
* @nbuf_frag_info_t: nbuf frag info
*
* Return: nbuf
*/
static inline QDF_STATUS
dp_rx_buffer_pool_nbuf_map(struct dp_soc *soc,
struct rx_desc_pool *rx_desc_pool,
struct dp_rx_nbuf_frag_info *nbuf_frag_info_t)
{
return qdf_nbuf_map_nbytes_single(soc->osdev,
(nbuf_frag_info_t->virt_addr).nbuf,
QDF_DMA_FROM_DEVICE,
rx_desc_pool->buf_size);
}
static inline void dp_rx_schedule_refill_thread(struct dp_soc *soc) { }
#endif /* WLAN_FEATURE_RX_PREALLOC_BUFFER_POOL */
#endif /* _DP_RX_BUFFER_POOL_H_ */