Merge branch 'ionic-cleanups-and-perf-tuning'

Shannon Nelson says:

====================
ionic: code cleanup and performance tuning

Brett has been performance testing and code tweaking and has
come up with several improvements for our fast path operations.

In a simple single thread / single queue iperf case on a 1500 MTU
connection we see an improvement from 74.2 to 86.7 Gbits/sec.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/pensando/ionic/ionic_debugfs.c

@@ -113,8 +113,8 @@ static const struct debugfs_reg32 intr_ctrl_regs[] = {
 void ionic_debugfs_add_qcq(struct ionic_lif *lif, struct ionic_qcq *qcq)
 {
 	struct dentry *qcq_dentry, *q_dentry, *cq_dentry;
-	struct dentry *intr_dentry, *stats_dentry;
 	struct ionic_dev *idev = &lif->ionic->idev;
+	struct dentry *intr_dentry, *stats_dentry;
 	struct debugfs_regset32 *intr_ctrl_regset;
 	struct ionic_intr_info *intr = &qcq->intr;
 	struct debugfs_blob_wrapper *desc_blob;

drivers/net/ethernet/pensando/ionic/ionic_dev.h

@@ -16,9 +16,10 @@
 #define IONIC_MAX_TX_DESC		8192
 #define IONIC_MAX_RX_DESC		16384
 #define IONIC_MIN_TXRX_DESC		64
-#define IONIC_DEF_TXRX_DESC		4096
+#define IONIC_DEF_TXRX_DESC		1024
 #define IONIC_RX_FILL_THRESHOLD		16
 #define IONIC_RX_FILL_DIV		8
+#define IONIC_TSO_DESCS_NEEDED		44 /* 64K TSO @1500B */
 #define IONIC_LIFS_MAX			1024
 #define IONIC_WATCHDOG_SECS		5
 #define IONIC_ITR_COAL_USEC_DEFAULT	64
@@ -379,6 +380,7 @@ typedef void (*ionic_cq_done_cb)(void *done_arg);
 unsigned int ionic_cq_service(struct ionic_cq *cq, unsigned int work_to_do,
 			      ionic_cq_cb cb, ionic_cq_done_cb done_cb,
 			      void *done_arg);
+unsigned int ionic_tx_cq_service(struct ionic_cq *cq, unsigned int work_to_do);
 
 int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
 		 struct ionic_queue *q, unsigned int index, const char *name,

drivers/net/ethernet/pensando/ionic/ionic_lif.c

@@ -52,15 +52,20 @@ static void ionic_xdp_unregister_rxq_info(struct ionic_queue *q);
 static void ionic_dim_work(struct work_struct *work)
 {
 	struct dim *dim = container_of(work, struct dim, work);
-	struct ionic_intr_info *intr;
 	struct dim_cq_moder cur_moder;
+	struct ionic_intr_info *intr;
 	struct ionic_qcq *qcq;
 	struct ionic_lif *lif;
+	struct ionic_queue *q;
 	u32 new_coal;
 
-	cur_moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
 	qcq = container_of(dim, struct ionic_qcq, dim);
-	lif = qcq->q.lif;
+	q = &qcq->q;
+	if (q->type == IONIC_QTYPE_RXQ)
+		cur_moder = net_dim_get_rx_moderation(dim->mode, dim->profile_ix);
+	else
+		cur_moder = net_dim_get_tx_moderation(dim->mode, dim->profile_ix);
+	lif = q->lif;
 	new_coal = ionic_coal_usec_to_hw(lif->ionic, cur_moder.usec);
 	new_coal = new_coal ? new_coal : 1;
 
@@ -685,7 +690,7 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 	}
 
 	INIT_WORK(&new->dim.work, ionic_dim_work);
-	new->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_EQE;
+	new->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_CQE;
 
 	*qcq = new;
 
@@ -1262,8 +1267,7 @@ static int ionic_adminq_napi(struct napi_struct *napi, int budget)
 					   ionic_rx_service, NULL, NULL);
 
 	if (lif->hwstamp_txq)
-		tx_work = ionic_cq_service(&lif->hwstamp_txq->cq, budget,
-					   ionic_tx_service, NULL, NULL);
+		tx_work = ionic_tx_cq_service(&lif->hwstamp_txq->cq, budget);
 
 	work_done = max(max(n_work, a_work), max(rx_work, tx_work));
 	if (work_done < budget && napi_complete_done(napi, work_done)) {

drivers/net/ethernet/pensando/ionic/ionic_lif.h

@@ -327,7 +327,7 @@ static inline u32 ionic_coal_usec_to_hw(struct ionic *ionic, u32 usecs)
 
 static inline bool ionic_txq_hwstamp_enabled(struct ionic_queue *q)
 {
-	return unlikely(q->features & IONIC_TXQ_F_HWSTAMP);
+	return q->features & IONIC_TXQ_F_HWSTAMP;
 }
 
 void ionic_link_status_check_request(struct ionic_lif *lif, bool can_sleep);

drivers/net/ethernet/pensando/ionic/ionic_main.c

@@ -15,7 +15,7 @@
 #include "ionic_debugfs.h"
 
 MODULE_DESCRIPTION(IONIC_DRV_DESCRIPTION);
-MODULE_AUTHOR("Pensando Systems, Inc");
+MODULE_AUTHOR("Shannon Nelson <shannon.nelson@amd.com>");
 MODULE_LICENSE("GPL");
 
 static const char *ionic_error_to_str(enum ionic_status_code code)

drivers/net/ethernet/pensando/ionic/ionic_txrx.h

@@ -15,7 +15,6 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget);
 netdev_tx_t ionic_start_xmit(struct sk_buff *skb, struct net_device *netdev);
 
 bool ionic_rx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info);
-bool ionic_tx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info);
 
 int ionic_xdp_xmit(struct net_device *netdev, int n, struct xdp_frame **xdp, u32 flags);
 #endif /* _IONIC_TXRX_H_ */