Merge branch 'move-est-lock-and-est-structure-to-struct-stmmac_priv'

Xiaolei Wang says:

====================
Move EST lock and EST structure to struct stmmac_priv

1. Pulling the mutex protecting the EST structure out to avoid
    clearing it during reinit/memset of the EST structure,and
    reacquire the mutex lock when doing this initialization.

2. Moving the EST structure to a more logical location
====================

Link: https://lore.kernel.org/r/20240513014346.1718740-1-xiaolei.wang@windriver.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

5 files changed, 70 insertions, 69 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index ed38099ca740..b23b920eedb1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -221,6 +221,20 @@ struct stmmac_dma_conf {
 	unsigned int dma_tx_size;
 };
 
+#define EST_GCL         1024
+struct stmmac_est {
+	int enable;
+	u32 btr_reserve[2];
+	u32 btr_offset[2];
+	u32 btr[2];
+	u32 ctr[2];
+	u32 ter;
+	u32 gcl_unaligned[EST_GCL];
+	u32 gcl[EST_GCL];
+	u32 gcl_size;
+	u32 max_sdu[MTL_MAX_TX_QUEUES];
+};
+
 struct stmmac_priv {
 	/* Frequently used values are kept adjacent for cache effect */
 	u32 tx_coal_frames[MTL_MAX_TX_QUEUES];
@@ -261,6 +275,9 @@ struct stmmac_priv {
 	struct stmmac_extra_stats xstats ____cacheline_aligned_in_smp;
 	struct stmmac_safety_stats sstats;
 	struct plat_stmmacenet_data *plat;
+	/* Protect est parameters */
+	struct mutex est_lock;
+	struct stmmac_est *est;
 	struct dma_features dma_cap;
 	struct stmmac_counters mmc;
 	int hw_cap_support;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index ef285b3c56ab..2e9a2da605f6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2498,9 +2498,9 @@ static bool stmmac_xdp_xmit_zc(struct stmmac_priv *priv, u32 queue, u32 budget)
 		if (!xsk_tx_peek_desc(pool, &xdp_desc))
 			break;
 
-		if (priv->plat->est && priv->plat->est->enable &&
-		    priv->plat->est->max_sdu[queue] &&
-		    xdp_desc.len > priv->plat->est->max_sdu[queue]) {
+		if (priv->est && priv->est->enable &&
+		    priv->est->max_sdu[queue] &&
+		    xdp_desc.len > priv->est->max_sdu[queue]) {
 			priv->xstats.max_sdu_txq_drop[queue]++;
 			continue;
 		}
@@ -4538,9 +4538,9 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
 			return stmmac_tso_xmit(skb, dev);
 	}
 
-	if (priv->plat->est && priv->plat->est->enable &&
-	    priv->plat->est->max_sdu[queue] &&
-	    skb->len > priv->plat->est->max_sdu[queue]){
+	if (priv->est && priv->est->enable &&
+	    priv->est->max_sdu[queue] &&
+	    skb->len > priv->est->max_sdu[queue]){
 		priv->xstats.max_sdu_txq_drop[queue]++;
 		goto max_sdu_err;
 	}
@@ -4919,9 +4919,9 @@ static int stmmac_xdp_xmit_xdpf(struct stmmac_priv *priv, int queue,
 	if (stmmac_tx_avail(priv, queue) < STMMAC_TX_THRESH(priv))
 		return STMMAC_XDP_CONSUMED;
 
-	if (priv->plat->est && priv->plat->est->enable &&
-	    priv->plat->est->max_sdu[queue] &&
-	    xdpf->len > priv->plat->est->max_sdu[queue]) {
+	if (priv->est && priv->est->enable &&
+	    priv->est->max_sdu[queue] &&
+	    xdpf->len > priv->est->max_sdu[queue]) {
 		priv->xstats.max_sdu_txq_drop[queue]++;
 		return STMMAC_XDP_CONSUMED;
 	}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
index e04830a3a1fb..a6b1de9a251d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c
@@ -68,13 +68,13 @@ static int stmmac_adjust_time(struct ptp_clock_info *ptp, s64 delta)
 	nsec = reminder;
 
 	/* If EST is enabled, disabled it before adjust ptp time. */
-	if (priv->plat->est && priv->plat->est->enable) {
+	if (priv->est && priv->est->enable) {
 		est_rst = true;
-		mutex_lock(&priv->plat->est->lock);
-		priv->plat->est->enable = false;
-		stmmac_est_configure(priv, priv, priv->plat->est,
+		mutex_lock(&priv->est_lock);
+		priv->est->enable = false;
+		stmmac_est_configure(priv, priv, priv->est,
 				     priv->plat->clk_ptp_rate);
-		mutex_unlock(&priv->plat->est->lock);
+		mutex_unlock(&priv->est_lock);
 	}
 
 	write_lock_irqsave(&priv->ptp_lock, flags);
@@ -87,24 +87,24 @@ static int stmmac_adjust_time(struct ptp_clock_info *ptp, s64 delta)
 		ktime_t current_time_ns, basetime;
 		u64 cycle_time;
 
-		mutex_lock(&priv->plat->est->lock);
+		mutex_lock(&priv->est_lock);
 		priv->ptp_clock_ops.gettime64(&priv->ptp_clock_ops, &current_time);
 		current_time_ns = timespec64_to_ktime(current_time);
-		time.tv_nsec = priv->plat->est->btr_reserve[0];
-		time.tv_sec = priv->plat->est->btr_reserve[1];
+		time.tv_nsec = priv->est->btr_reserve[0];
+		time.tv_sec = priv->est->btr_reserve[1];
 		basetime = timespec64_to_ktime(time);
-		cycle_time = (u64)priv->plat->est->ctr[1] * NSEC_PER_SEC +
-			     priv->plat->est->ctr[0];
+		cycle_time = (u64)priv->est->ctr[1] * NSEC_PER_SEC +
+			     priv->est->ctr[0];
 		time = stmmac_calc_tas_basetime(basetime,
 						current_time_ns,
 						cycle_time);
 
-		priv->plat->est->btr[0] = (u32)time.tv_nsec;
-		priv->plat->est->btr[1] = (u32)time.tv_sec;
-		priv->plat->est->enable = true;
-		ret = stmmac_est_configure(priv, priv, priv->plat->est,
+		priv->est->btr[0] = (u32)time.tv_nsec;
+		priv->est->btr[1] = (u32)time.tv_sec;
+		priv->est->enable = true;
+		ret = stmmac_est_configure(priv, priv, priv->est,
 					   priv->plat->clk_ptp_rate);
-		mutex_unlock(&priv->plat->est->lock);
+		mutex_unlock(&priv->est_lock);
 		if (ret)
 			netdev_err(priv->dev, "failed to configure EST\n");
 	}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index cce00719937d..222540b55480 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -918,7 +918,6 @@ struct timespec64 stmmac_calc_tas_basetime(ktime_t old_base_time,
 static void tc_taprio_map_maxsdu_txq(struct stmmac_priv *priv,
 				     struct tc_taprio_qopt_offload *qopt)
 {
-	struct plat_stmmacenet_data *plat = priv->plat;
 	u32 num_tc = qopt->mqprio.qopt.num_tc;
 	u32 offset, count, i, j;
 
@@ -933,7 +932,7 @@ static void tc_taprio_map_maxsdu_txq(struct stmmac_priv *priv,
 		count = qopt->mqprio.qopt.count[i];
 
 		for (j = offset; j < offset + count; j++)
-			plat->est->max_sdu[j] = qopt->max_sdu[i] + ETH_HLEN - ETH_TLEN;
+			priv->est->max_sdu[j] = qopt->max_sdu[i] + ETH_HLEN - ETH_TLEN;
 	}
 }
 
@@ -941,7 +940,6 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 			       struct tc_taprio_qopt_offload *qopt)
 {
 	u32 size, wid = priv->dma_cap.estwid, dep = priv->dma_cap.estdep;
-	struct plat_stmmacenet_data *plat = priv->plat;
 	struct timespec64 time, current_time, qopt_time;
 	ktime_t current_time_ns;
 	bool fpe = false;
@@ -998,23 +996,25 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 	if (qopt->cycle_time_extension >= BIT(wid + 7))
 		return -ERANGE;
 
-	if (!plat->est) {
-		plat->est = devm_kzalloc(priv->device, sizeof(*plat->est),
+	if (!priv->est) {
+		priv->est = devm_kzalloc(priv->device, sizeof(*priv->est),
 					 GFP_KERNEL);
-		if (!plat->est)
+		if (!priv->est)
 			return -ENOMEM;
 
-		mutex_init(&priv->plat->est->lock);
+		mutex_init(&priv->est_lock);
 	} else {
-		memset(plat->est, 0, sizeof(*plat->est));
+		mutex_lock(&priv->est_lock);
+		memset(priv->est, 0, sizeof(*priv->est));
+		mutex_unlock(&priv->est_lock);
 	}
 
 	size = qopt->num_entries;
 
-	mutex_lock(&priv->plat->est->lock);
-	priv->plat->est->gcl_size = size;
-	priv->plat->est->enable = qopt->cmd == TAPRIO_CMD_REPLACE;
-	mutex_unlock(&priv->plat->est->lock);
+	mutex_lock(&priv->est_lock);
+	priv->est->gcl_size = size;
+	priv->est->enable = qopt->cmd == TAPRIO_CMD_REPLACE;
+	mutex_unlock(&priv->est_lock);
 
 	for (i = 0; i < size; i++) {
 		s64 delta_ns = qopt->entries[i].interval;
@@ -1042,33 +1042,33 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 			return -EOPNOTSUPP;
 		}
 
-		priv->plat->est->gcl[i] = delta_ns | (gates << wid);
+		priv->est->gcl[i] = delta_ns | (gates << wid);
 	}
 
-	mutex_lock(&priv->plat->est->lock);
+	mutex_lock(&priv->est_lock);
 	/* Adjust for real system time */
 	priv->ptp_clock_ops.gettime64(&priv->ptp_clock_ops, &current_time);
 	current_time_ns = timespec64_to_ktime(current_time);
 	time = stmmac_calc_tas_basetime(qopt->base_time, current_time_ns,
 					qopt->cycle_time);
 
-	priv->plat->est->btr[0] = (u32)time.tv_nsec;
-	priv->plat->est->btr[1] = (u32)time.tv_sec;
+	priv->est->btr[0] = (u32)time.tv_nsec;
+	priv->est->btr[1] = (u32)time.tv_sec;
 
 	qopt_time = ktime_to_timespec64(qopt->base_time);
-	priv->plat->est->btr_reserve[0] = (u32)qopt_time.tv_nsec;
-	priv->plat->est->btr_reserve[1] = (u32)qopt_time.tv_sec;
+	priv->est->btr_reserve[0] = (u32)qopt_time.tv_nsec;
+	priv->est->btr_reserve[1] = (u32)qopt_time.tv_sec;
 
 	ctr = qopt->cycle_time;
-	priv->plat->est->ctr[0] = do_div(ctr, NSEC_PER_SEC);
-	priv->plat->est->ctr[1] = (u32)ctr;
+	priv->est->ctr[0] = do_div(ctr, NSEC_PER_SEC);
+	priv->est->ctr[1] = (u32)ctr;
 
-	priv->plat->est->ter = qopt->cycle_time_extension;
+	priv->est->ter = qopt->cycle_time_extension;
 
 	tc_taprio_map_maxsdu_txq(priv, qopt);
 
 	if (fpe && !priv->dma_cap.fpesel) {
-		mutex_unlock(&priv->plat->est->lock);
+		mutex_unlock(&priv->est_lock);
 		return -EOPNOTSUPP;
 	}
 
@@ -1077,9 +1077,9 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 	 */
 	priv->plat->fpe_cfg->enable = fpe;
 
-	ret = stmmac_est_configure(priv, priv, priv->plat->est,
+	ret = stmmac_est_configure(priv, priv, priv->est,
 				   priv->plat->clk_ptp_rate);
-	mutex_unlock(&priv->plat->est->lock);
+	mutex_unlock(&priv->est_lock);
 	if (ret) {
 		netdev_err(priv->dev, "failed to configure EST\n");
 		goto disable;
@@ -1095,17 +1095,17 @@ static int tc_taprio_configure(struct stmmac_priv *priv,
 	return 0;
 
 disable:
-	if (priv->plat->est) {
-		mutex_lock(&priv->plat->est->lock);
-		priv->plat->est->enable = false;
-		stmmac_est_configure(priv, priv, priv->plat->est,
+	if (priv->est) {
+		mutex_lock(&priv->est_lock);
+		priv->est->enable = false;
+		stmmac_est_configure(priv, priv, priv->est,
 				     priv->plat->clk_ptp_rate);
 		/* Reset taprio status */
 		for (i = 0; i < priv->plat->tx_queues_to_use; i++) {
 			priv->xstats.max_sdu_txq_drop[i] = 0;
 			priv->xstats.mtl_est_txq_hlbf[i] = 0;
 		}
-		mutex_unlock(&priv->plat->est->lock);
+		mutex_unlock(&priv->est_lock);
 	}
 
 	priv->plat->fpe_cfg->enable = false;
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 4a24a246c617..f92c195c76ed 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -115,21 +115,6 @@ struct stmmac_axi {
 	bool axi_rb;
 };
 
-#define EST_GCL		1024
-struct stmmac_est {
-	struct mutex lock;
-	int enable;
-	u32 btr_reserve[2];
-	u32 btr_offset[2];
-	u32 btr[2];
-	u32 ctr[2];
-	u32 ter;
-	u32 gcl_unaligned[EST_GCL];
-	u32 gcl[EST_GCL];
-	u32 gcl_size;
-	u32 max_sdu[MTL_MAX_TX_QUEUES];
-};
-
 struct stmmac_rxq_cfg {
 	u8 mode_to_use;
 	u32 chan;
@@ -246,7 +231,6 @@ struct plat_stmmacenet_data {
 	struct fwnode_handle *port_node;
 	struct device_node *mdio_node;
 	struct stmmac_dma_cfg *dma_cfg;
-	struct stmmac_est *est;
 	struct stmmac_fpe_cfg *fpe_cfg;
 	struct stmmac_safety_feature_cfg *safety_feat_cfg;
 	int clk_csr;