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qcacmn: Optimize tx completion processing in fast path

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Optimize tx completion processing in fastpath by adding the list of
tx descs to the free list directly instead of individually accessing
each descriptor and adding it to free list. This gives advantages of
not taking descriptor pool lock for each descriptor and rather takes
the lock only once when appending the whole list of descs to the
free list.

Also removed unused member shinfo_addr from tx_desc structure. Removal
of this member enables increase of flags type from u16 to u32 without
increasing the size of tx_desc structure. These changes improved peak
KPI by 2% in SFE mode.

Change-Id: I995de9cc08c866ad6e1cd1efc76ac2a35d40fb7c
CRs-Fixed: 3584578
This commit is contained in:
Nandha Kishore Easwaran
2023-08-08 09:53:23 +05:30
committed by Rahul Choudhary
parent fb7d334b7c
commit 15812b8137
6 changed files with 221 additions and 22 deletions
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113
dp/wifi3.0/dp_tx.h
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@@ -69,13 +69,9 @@ int dp_tx_proxy_arp(struct dp_vdev *vdev, qdf_nbuf_t nbuf);
#define DP_TX_DESC_FLAG_FLUSH 0x2000
#define DP_TX_DESC_FLAG_TRAFFIC_END_IND 0x4000
#define DP_TX_DESC_FLAG_RMNET 0x8000
/*
* Since the Tx descriptor flag is of only 16-bit and no more bit is free for
* any new flag, therefore for time being overloading PPEDS flag with that of
* FLUSH flag and FLAG_FAST with TDLS which is not enabled for WIN.
*/
#define DP_TX_DESC_FLAG_PPEDS 0x2000
#define DP_TX_DESC_FLAG_FAST 0x100
#define DP_TX_DESC_FLAG_FASTPATH_SIMPLE 0x10000
#define DP_TX_DESC_FLAG_PPEDS 0x20000
#define DP_TX_DESC_FLAG_FAST 0x40000
#define DP_TX_EXT_DESC_FLAG_METADATA_VALID 0x1
@@ -274,6 +270,26 @@ void
dp_tx_comp_process_desc_list(struct dp_soc *soc,
struct dp_tx_desc_s *comp_head, uint8_t ring_id);
/**
* dp_tx_comp_process_desc_list_fast() - Tx complete fast sw descriptor handler
* @soc: core txrx main context
* @head_desc: software descriptor head pointer
* @tail_desc: software descriptor tail pointer
* @ring_id: ring number
* @fast_desc_count: Total descriptor count in the list
*
* This function will process batch of descriptors reaped by dp_tx_comp_handler
* and append the list of descriptors to the freelist
*
* Return: none
*/
void
dp_tx_comp_process_desc_list_fast(struct dp_soc *soc,
struct dp_tx_desc_s *head_desc,
struct dp_tx_desc_s *tail_desc,
uint8_t ring_id,
uint32_t fast_desc_count);
/**
* dp_tx_comp_free_buf() - Free nbuf associated with the Tx Descriptor
* @soc: Soc handle
@@ -1976,6 +1992,40 @@ dp_tx_outstanding_dec(struct dp_pdev *pdev)
dp_update_tx_desc_stats(pdev);
}
/**
* __dp_tx_outstanding_sub - Sub outstanding tx desc values from global list
* @soc: DP soc handle
* @count: count of descs to subtract from outstanding
*
* Return: void
*/
static inline void
__dp_tx_outstanding_sub(struct dp_soc *soc, uint32_t count)
{
struct dp_global_context *dp_global;
dp_global = wlan_objmgr_get_global_ctx();
qdf_atomic_sub(count, &dp_global->global_descriptor_in_use);
}
/**
* dp_tx_outstanding_sub - Subtract outstanding tx desc values on pdev
* @pdev: DP pdev handle
* @count: count of descs to subtract from outstanding
*
* Return: void
*/
static inline void
dp_tx_outstanding_sub(struct dp_pdev *pdev, uint32_t count)
{
struct dp_soc *soc = pdev->soc;
__dp_tx_outstanding_sub(soc, count);
qdf_atomic_sub(count, &pdev->num_tx_outstanding);
dp_update_tx_desc_stats(pdev);
}
#else
static inline void
@@ -2020,6 +2070,36 @@ dp_tx_outstanding_dec(struct dp_pdev *pdev)
qdf_atomic_dec(&pdev->num_tx_outstanding);
dp_update_tx_desc_stats(pdev);
}
/**
* __dp_tx_outstanding_sub - Sub outstanding tx desc values from soc
* @soc: DP soc handle
* @count: count of descs to subtract from outstanding
*
* Return: void
*/
static inline void
__dp_tx_outstanding_sub(struct dp_soc *soc, uint32_t count)
{
qdf_atomic_sub(count, &soc->num_tx_outstanding);
}
/**
* dp_tx_outstanding_sub - Subtract outstanding tx desc values on pdev
* @pdev: DP pdev handle
* @count: count of descs to subtract from outstanding
*
* Return: void
*/
static inline void
dp_tx_outstanding_sub(struct dp_pdev *pdev, uint32_t count)
{
struct dp_soc *soc = pdev->soc;
__dp_tx_outstanding_sub(soc, count);
qdf_atomic_sub(count, &pdev->num_tx_outstanding);
dp_update_tx_desc_stats(pdev);
}
#endif /* QCA_SUPPORT_DP_GLOBAL_CTX */
#else //QCA_TX_LIMIT_CHECK
@@ -2064,6 +2144,25 @@ dp_tx_outstanding_dec(struct dp_pdev *pdev)
qdf_atomic_dec(&pdev->num_tx_outstanding);
dp_update_tx_desc_stats(pdev);
}
static inline void
__dp_tx_outstanding_sub(struct dp_soc *soc, uint32_t count)
{
}
/**
* dp_tx_outstanding_sub - Subtract outstanding tx desc values on pdev
* @pdev: DP pdev handle
* @count: count of descs to subtract from outstanding
*
* Return: void
*/
static inline void
dp_tx_outstanding_sub(struct dp_pdev *pdev, uint32_t count)
{
qdf_atomic_sub(count, &pdev->num_tx_outstanding);
dp_update_tx_desc_stats(pdev);
}
#endif //QCA_TX_LIMIT_CHECK
/**