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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
Download patch file Download diff file Expand all files Collapse all files

24
dp/wifi3.0/dp_main.c
View file

@ -862,8 +862,6 @@ static void dp_hw_link_desc_pool_cleanup(struct dp_soc *soc)
/* TODO: Following should be configurable */
#define WBM_RELEASE_RING_SIZE 64
#define TCL_DATA_RING_SIZE 512
#define TX_COMP_RING_SIZE 1024
#define TCL_CMD_RING_SIZE 32
#define TCL_STATUS_RING_SIZE 32
#define REO_DST_RING_SIZE 2048
@ -891,6 +889,8 @@ static int dp_soc_cmn_setup(struct dp_soc *soc)
{
int i;
struct hal_reo_params reo_params;
int tx_ring_size;
int tx_comp_ring_size;
if (qdf_atomic_read(&soc->cmn_init_done))
return 0;
@ -916,16 +916,20 @@ static int dp_soc_cmn_setup(struct dp_soc *soc)
if (!wlan_cfg_per_pdev_tx_ring(soc->wlan_cfg_ctx)) {
soc->num_tcl_data_rings =
wlan_cfg_num_tcl_data_rings(soc->wlan_cfg_ctx);
tx_comp_ring_size =
wlan_cfg_tx_comp_ring_size(soc->wlan_cfg_ctx);
tx_ring_size =
wlan_cfg_tx_ring_size(soc->wlan_cfg_ctx);
for (i = 0; i < soc->num_tcl_data_rings; i++) {
if (dp_srng_setup(soc, &soc->tcl_data_ring[i],
TCL_DATA, i, 0, TCL_DATA_RING_SIZE)) {
TCL_DATA, i, 0, tx_ring_size)) {
QDF_TRACE(QDF_MODULE_ID_DP,
QDF_TRACE_LEVEL_ERROR,
FL("dp_srng_setup failed for tcl_data_ring[%d]"), i);
goto fail1;
}
if (dp_srng_setup(soc, &soc->tx_comp_ring[i],
WBM2SW_RELEASE, i, 0, TX_COMP_RING_SIZE)) {
WBM2SW_RELEASE, i, 0, tx_comp_ring_size)) {
QDF_TRACE(QDF_MODULE_ID_DP,
QDF_TRACE_LEVEL_ERROR,
FL("dp_srng_setup failed for tx_comp_ring[%d]"), i);
@ -1186,6 +1190,9 @@ static struct cdp_pdev *dp_pdev_attach_wifi3(struct cdp_soc_t *txrx_soc,
struct cdp_cfg *ctrl_pdev,
HTC_HANDLE htc_handle, qdf_device_t qdf_osdev, uint8_t pdev_id)
{
int tx_ring_size;
int tx_comp_ring_size;
struct dp_soc *soc = (struct dp_soc *)txrx_soc;
struct dp_pdev *pdev = qdf_mem_malloc(sizeof(*pdev));
@ -1232,14 +1239,19 @@ static struct cdp_pdev *dp_pdev_attach_wifi3(struct cdp_soc_t *txrx_soc,
/* Setup per PDEV TCL rings if configured */
if (wlan_cfg_per_pdev_tx_ring(soc->wlan_cfg_ctx)) {
tx_ring_size =
wlan_cfg_tx_ring_size(soc->wlan_cfg_ctx);
tx_comp_ring_size =
wlan_cfg_tx_comp_ring_size(soc->wlan_cfg_ctx);
if (dp_srng_setup(soc, &soc->tcl_data_ring[pdev_id], TCL_DATA,
pdev_id, pdev_id, TCL_DATA_RING_SIZE)) {
pdev_id, pdev_id, tx_ring_size)) {
QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
FL("dp_srng_setup failed for tcl_data_ring"));
goto fail1;
}
if (dp_srng_setup(soc, &soc->tx_comp_ring[pdev_id],
WBM2SW_RELEASE, pdev_id, pdev_id, TCL_DATA_RING_SIZE)) {
WBM2SW_RELEASE, pdev_id, pdev_id, tx_comp_ring_size)) {
QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
FL("dp_srng_setup failed for tx_comp_ring"));
goto fail1;

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