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qcacmn: Set the Tx completion ring size to appropriate value

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Size the completion ring using following 2 parameters
 - NAPI schedule latency (assuming 1 netdev, gmac, competing for CPU) = 20ms
								 (2 jiffies)
 - Worst case PPS requirement = 400K PPS
    Ring size = 20 * 400 = 8000

Change-Id: Iaac0b61f50b52a4e824c3c8ef5d980adf455854c
CRs-Fixed: 2068155
This commit is contained in:
Pamidipati, Vijay 2017-07-05 03:09:20 +05:30 • committed by Nandini Suresh
commit bea353e14c
3 changed files with 62 additions and 6 deletions
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28
wlan_cfg/wlan_cfg.c
View file

@ -36,6 +36,8 @@
#define WLAN_CFG_PER_PDEV_RX_RING 0
#define NUM_RXDMA_RINGS_PER_PDEV 2
#define WLAN_LRO_ENABLE 1
#define WLAN_CFG_TX_RING_SIZE 512
#define WLAN_CFG_TX_COMP_RING_SIZE 1024
/* Tx Descriptor and Tx Extension Descriptor pool sizes */
#define WLAN_CFG_NUM_TX_DESC 1024
@ -71,6 +73,17 @@
#define WLAN_CFG_INT_TIMER_THRESHOLD_TX 1000
#define WLAN_CFG_INT_TIMER_THRESHOLD_RX 500
#define WLAN_CFG_INT_TIMER_THRESHOLD_OTHER 8
#define WLAN_CFG_TX_RING_SIZE 512
/* Size the completion ring using following 2 parameters
* - NAPI schedule latency (assuming 1 netdev competing for CPU) = 20 ms (2 jiffies)
* - Worst case PPS requirement = 400K PPS
*
* Ring size = 20 * 400 = 8000
* 8192 is nearest power of 2
*/
#define WLAN_CFG_TX_COMP_RING_SIZE (8 << 10)
#endif
#define WLAN_CFG_INT_NUM_CONTEXTS 4
@ -232,6 +245,8 @@ struct wlan_cfg_dp_soc_ctxt {
int int_timer_threshold_rx;
int int_batch_threshold_other;
int int_timer_threshold_other;
int tx_ring_size;
int tx_comp_ring_size;
int int_tx_ring_mask[WLAN_CFG_INT_NUM_CONTEXTS];
int int_rx_ring_mask[WLAN_CFG_INT_NUM_CONTEXTS];
int int_rx_mon_ring_mask[WLAN_CFG_INT_NUM_CONTEXTS];
@ -292,6 +307,9 @@ struct wlan_cfg_dp_soc_ctxt *wlan_cfg_soc_attach()
wlan_cfg_ctx->htt_packet_type = WLAN_CFG_HTT_PKT_TYPE;
wlan_cfg_ctx->max_peer_id = WLAN_CFG_MAX_PEER_ID;
wlan_cfg_ctx->tx_ring_size = WLAN_CFG_TX_RING_SIZE;
wlan_cfg_ctx->tx_comp_ring_size = WLAN_CFG_TX_COMP_RING_SIZE;
wlan_cfg_ctx->int_batch_threshold_tx = WLAN_CFG_INT_BATCH_THRESHOLD_TX;
wlan_cfg_ctx->int_timer_threshold_tx = WLAN_CFG_INT_TIMER_THRESHOLD_TX;
wlan_cfg_ctx->int_batch_threshold_rx = WLAN_CFG_INT_BATCH_THRESHOLD_RX;
@ -509,6 +527,16 @@ int wlan_cfg_num_tcl_data_rings(struct wlan_cfg_dp_soc_ctxt *cfg)
return cfg->num_tcl_data_rings;
}
int wlan_cfg_tx_ring_size(struct wlan_cfg_dp_soc_ctxt *cfg)
{
return cfg->tx_ring_size;
}
int wlan_cfg_tx_comp_ring_size(struct wlan_cfg_dp_soc_ctxt *cfg)
{
return cfg->tx_comp_ring_size;
}
int wlan_cfg_per_pdev_rx_ring(struct wlan_cfg_dp_soc_ctxt *cfg)
{
return cfg->per_pdev_rx_ring;

16
wlan_cfg/wlan_cfg.h
View file

@ -473,4 +473,20 @@ int wlan_cfg_get_int_batch_threshold_other(struct wlan_cfg_dp_soc_ctxt *cfg);
* Return: Timer threshold
*/
int wlan_cfg_get_int_timer_threshold_other(struct wlan_cfg_dp_soc_ctxt *cfg);
/*
* wlan_cfg_tx_ring_size - Get Tx DMA ring size (TCL Data Ring)
* @wlan_cfg_soc_ctx
*
* Return: Tx Ring Size
*/
int wlan_cfg_tx_ring_size(struct wlan_cfg_dp_soc_ctxt *cfg);
/*
* wlan_cfg_tx_comp_ring_size - Get Tx completion ring size (WBM Ring)
* @wlan_cfg_soc_ctx
*
* Return: Tx Completion ring size
*/
int wlan_cfg_tx_comp_ring_size(struct wlan_cfg_dp_soc_ctxt *cfg);
#endif