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qcacmn: Coalesc the tx head pointer writes

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Add the support to coalesc the tx head pointer
register writes to reduce the number of PCIe
writes.

Change-Id: I4fea22464c2bf6930bac42dab72c1c2fc5fa18e2
CRs-Fixed: 2769017
This commit is contained in:
Rakesh Pillai
2020-08-25 23:27:41 -07:00
committed by snandini
parent 21af5ba8cf
commit 156a7ecfc0
2 changed files with 98 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

87
dp/wifi3.0/dp_tx.c
View File

@@ -41,6 +41,9 @@
#include "dp_txrx_me.h"
#endif
#include "dp_hist.h"
#ifdef WLAN_DP_FEATURE_SW_LATENCY_MGR
#include <dp_swlm.h>
#endif
/* Flag to skip CCE classify when mesh or tid override enabled */
#define DP_TX_SKIP_CCE_CLASSIFY \
@@ -430,7 +433,6 @@ static void dp_tx_prepare_tso_ext_desc(struct qdf_tso_seg_t *tso_seg,
hal_tx_ext_desc_set_tcp_seq(ext_desc, tso_seg->tso_flags.tcp_seq_num);
hal_tx_ext_desc_set_ip_id(ext_desc, tso_seg->tso_flags.ip_id);
for (num_frag = 0; num_frag < tso_seg->num_frags; num_frag++) {
uint32_t lo = 0;
uint32_t hi = 0;
@@ -1143,11 +1145,90 @@ static inline void dp_tx_update_stats(struct dp_soc *soc,
{
DP_STATS_INC_PKT(soc, tx.egress, 1, qdf_nbuf_len(nbuf));
}
/**
* dp_tx_attempt_coalescing() - Check and attempt TCL register write coalescing
* @soc: Datapath soc handle
* @tx_desc: tx packet descriptor
* @tid: TID for pkt transmission
*
* Returns: 1, if coalescing is to be done
* 0, if coalescing is not to be done
*/
static inline int
dp_tx_attempt_coalescing(struct dp_soc *soc, struct dp_vdev *vdev,
struct dp_tx_desc_s *tx_desc,
uint8_t tid)
{
struct dp_swlm *swlm = &soc->swlm;
union swlm_data swlm_query_data;
struct dp_swlm_tcl_data tcl_data;
QDF_STATUS status;
int ret;
if (qdf_unlikely(!swlm->is_enabled))
return 0;
tcl_data.nbuf = tx_desc->nbuf;
tcl_data.tid = tid;
tcl_data.num_ll_connections = vdev->num_latency_critical_conn;
swlm_query_data.tcl_data = &tcl_data;
status = dp_swlm_tcl_pre_check(soc, &tcl_data);
if (QDF_IS_STATUS_ERROR(status)) {
dp_swlm_tcl_reset_session_data(soc);
return 0;
}
ret = dp_swlm_query_policy(soc, TCL_DATA, swlm_query_data);
if (ret) {
DP_STATS_INC(swlm, tcl.coalesc_success, 1);
} else {
DP_STATS_INC(swlm, tcl.coalesc_fail, 1);
}
return ret;
}
/**
* dp_tx_ring_access_end() - HAL ring access end for data transmission
* @soc: Datapath soc handle
* @hal_ring_hdl: HAL ring handle
* @coalesc: Coalesc the current write or not
*
* Returns: none
*/
static inline void
dp_tx_ring_access_end(struct dp_soc *soc, hal_ring_handle_t hal_ring_hdl,
int coalesc)
{
if (coalesc)
dp_tx_hal_ring_access_end_reap(soc, hal_ring_hdl);
else
dp_tx_hal_ring_access_end(soc, hal_ring_hdl);
}
#else
static inline void dp_tx_update_stats(struct dp_soc *soc,
qdf_nbuf_t nbuf)
{
}
static inline int
dp_tx_attempt_coalescing(struct dp_soc *soc, struct dp_vdev *vdev,
struct dp_tx_desc_s *tx_desc,
uint8_t tid)
{
return 0;
}
static inline void
dp_tx_ring_access_end(struct dp_soc *soc, hal_ring_handle_t hal_ring_hdl,
int coalesc)
{
dp_tx_hal_ring_access_end(soc, hal_ring_hdl);
}
#endif
/**
* dp_tx_hw_enqueue() - Enqueue to TCL HW for transmit
@@ -1174,6 +1255,7 @@ static QDF_STATUS dp_tx_hw_enqueue(struct dp_soc *soc, struct dp_vdev *vdev,
uint8_t type;
void *hal_tx_desc;
uint32_t *hal_tx_desc_cached;
int coalesc = 0;
/*
* Setting it initialization statically here to avoid
@@ -1291,6 +1373,7 @@ static QDF_STATUS dp_tx_hw_enqueue(struct dp_soc *soc, struct dp_vdev *vdev,
tx_desc->flags |= DP_TX_DESC_FLAG_QUEUED_TX;
dp_vdev_peer_stats_update_protocol_cnt_tx(vdev, tx_desc->nbuf);
hal_tx_desc_sync(hal_tx_desc_cached, hal_tx_desc);
coalesc = dp_tx_attempt_coalescing(soc, vdev, tx_desc, tid);
DP_STATS_INC_PKT(vdev, tx_i.processed, 1, tx_desc->length);
dp_tx_update_stats(soc, tx_desc->nbuf);
status = QDF_STATUS_SUCCESS;
@@ -1298,7 +1381,7 @@ static QDF_STATUS dp_tx_hw_enqueue(struct dp_soc *soc, struct dp_vdev *vdev,
ring_access_fail:
if (hif_pm_runtime_get(soc->hif_handle,
RTPM_ID_DW_TX_HW_ENQUEUE) == 0) {
dp_tx_hal_ring_access_end(soc, hal_ring_hdl);
dp_tx_ring_access_end(soc, hal_ring_hdl, coalesc);
hif_pm_runtime_put(soc->hif_handle,
RTPM_ID_DW_TX_HW_ENQUEUE);
} else {

13
dp/wifi3.0/dp_types.h
View File

@@ -1132,6 +1132,7 @@ struct dp_last_op_info {
* descision making
* @nbuf: TX packet
* @tid: tid for transmitting the current packet
* @num_ll_connections: Number of low latency connections on this vdev
*
* This structure contains the information required by the software
* latency manager to decide on whether to coalesc the current TCL
@@ -1140,6 +1141,7 @@ struct dp_last_op_info {
struct dp_swlm_tcl_data {
qdf_nbuf_t nbuf;
uint8_t tid;
uint8_t num_ll_connections;
};
/**
@@ -1168,12 +1170,16 @@ struct dp_swlm_ops {
* was being transmitted on a TID above coalescing threshold
* @tcl.sp_frames: Num TCL register write coalescing skips, since the pkt
* being transmitted was a special frame
* @tcl.ll_connection: Num TCL register write coalescing skips, since the
* vdev has low latency connections
* @tcl.bytes_thresh_reached: Num TCL HP writes flush after the coalescing
* bytes threshold was reached
* @tcl.time_thresh_reached: Num TCL HP writes flush after the coalescing
* session time expired
* @tcl.tput_criteria_fail: Num TCL HP writes coalescing fails, since the
* throughput did not meet session threshold
* @tcl.coalesc_success: Num of TCL HP writes coalesced successfully.
* @tcl.coalesc_fail: Num of TCL HP writes coalesces failed
*/
struct dp_swlm_stats {
struct {
@@ -1181,9 +1187,12 @@ struct dp_swlm_stats {
uint32_t timer_flush_fail;
uint32_t tid_fail;
uint32_t sp_frames;
uint32_t ll_connection;
uint32_t bytes_thresh_reached;
uint32_t time_thresh_reached;
uint32_t tput_criteria_fail;
uint32_t coalesc_success;
uint32_t coalesc_fail;
} tcl;
};
@@ -1202,6 +1211,8 @@ struct dp_swlm_stats {
* @tcl.tx_thresh_multiplier: Multiplier to deduce the bytes threshold after
* which the TCL HP register is written, thereby
* ending the coalescing.
* @tcl.coalesc_end_time: End timestamp for current coalescing session
* @tcl.bytes_coalesced: Num bytes coalesced in the current session
*/
struct dp_swlm_params {
struct {
@@ -1213,6 +1224,8 @@ struct dp_swlm_params {
uint32_t bytes_flush_thresh;
uint32_t time_flush_thresh;
uint32_t tx_thresh_multiplier;
uint64_t coalesc_end_time;
uint32_t bytes_coalesced;
} tcl;
};