net: stmmac: Switch stmmac_hwtimestamp to generic HW Interface Helpers

Switch stmmac_hwtimestamp to generic Hardware Interface Helpers instead
of using hard-coded callbacks. This makes the code more readable and
more flexible.

No functional change.
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Joao Pinto <jpinto@synopsys.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/common.h

@@ -383,18 +383,6 @@ extern const struct stmmac_desc_ops ndesc_ops;
 
 struct mac_device_info;
 
-/* PTP and HW Timer helpers */
-struct stmmac_hwtimestamp {
-	void (*config_hw_tstamping) (void __iomem *ioaddr, u32 data);
-	u32 (*config_sub_second_increment)(void __iomem *ioaddr, u32 ptp_clock,
-					   int gmac4);
-	int (*init_systime) (void __iomem *ioaddr, u32 sec, u32 nsec);
-	int (*config_addend) (void __iomem *ioaddr, u32 addend);
-	int (*adjust_systime) (void __iomem *ioaddr, u32 sec, u32 nsec,
-			       int add_sub, int gmac4);
-	 u64(*get_systime) (void __iomem *ioaddr);
-};
-
 extern const struct stmmac_hwtimestamp stmmac_ptp;
 extern const struct stmmac_mode_ops dwmac4_ring_mode_ops;
 

drivers/net/ethernet/stmicro/stmmac/hwif.h

@@ -366,4 +366,29 @@ struct stmmac_ops {
 #define stmmac_safety_feat_dump(__priv, __args...) \
 	stmmac_do_callback(__priv, mac, safety_feat_dump, __args)
 
+/* PTP and HW Timer helpers */
+struct stmmac_hwtimestamp {
+	void (*config_hw_tstamping) (void __iomem *ioaddr, u32 data);
+	void (*config_sub_second_increment)(void __iomem *ioaddr, u32 ptp_clock,
+					   int gmac4, u32 *ssinc);
+	int (*init_systime) (void __iomem *ioaddr, u32 sec, u32 nsec);
+	int (*config_addend) (void __iomem *ioaddr, u32 addend);
+	int (*adjust_systime) (void __iomem *ioaddr, u32 sec, u32 nsec,
+			       int add_sub, int gmac4);
+	void (*get_systime) (void __iomem *ioaddr, u64 *systime);
+};
+
+#define stmmac_config_hw_tstamping(__priv, __args...) \
+	stmmac_do_void_callback(__priv, ptp, config_hw_tstamping, __args)
+#define stmmac_config_sub_second_increment(__priv, __args...) \
+	stmmac_do_void_callback(__priv, ptp, config_sub_second_increment, __args)
+#define stmmac_init_systime(__priv, __args...) \
+	stmmac_do_callback(__priv, ptp, init_systime, __args)
+#define stmmac_config_addend(__priv, __args...) \
+	stmmac_do_callback(__priv, ptp, config_addend, __args)
+#define stmmac_adjust_systime(__priv, __args...) \
+	stmmac_do_callback(__priv, ptp, adjust_systime, __args)
+#define stmmac_get_systime(__priv, __args...) \
+	stmmac_do_void_callback(__priv, ptp, get_systime, __args)
+
 #endif /* __STMMAC_HWIF_H__ */

drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c

@@ -24,13 +24,13 @@
 #include "common.h"
 #include "stmmac_ptp.h"
 
-static void stmmac_config_hw_tstamping(void __iomem *ioaddr, u32 data)
+static void config_hw_tstamping(void __iomem *ioaddr, u32 data)
 {
 	writel(data, ioaddr + PTP_TCR);
 }
 
-static u32 stmmac_config_sub_second_increment(void __iomem *ioaddr,
-					      u32 ptp_clock, int gmac4)
+static void config_sub_second_increment(void __iomem *ioaddr,
+		u32 ptp_clock, int gmac4, u32 *ssinc)
 {
 	u32 value = readl(ioaddr + PTP_TCR);
 	unsigned long data;
@@ -57,10 +57,11 @@ static u32 stmmac_config_sub_second_increment(void __iomem *ioaddr,
 
 	writel(reg_value, ioaddr + PTP_SSIR);
 
-	return data;
+	if (ssinc)
+		*ssinc = data;
 }
 
-static int stmmac_init_systime(void __iomem *ioaddr, u32 sec, u32 nsec)
+static int init_systime(void __iomem *ioaddr, u32 sec, u32 nsec)
 {
 	int limit;
 	u32 value;
@@ -85,7 +86,7 @@ static int stmmac_init_systime(void __iomem *ioaddr, u32 sec, u32 nsec)
 	return 0;
 }
 
-static int stmmac_config_addend(void __iomem *ioaddr, u32 addend)
+static int config_addend(void __iomem *ioaddr, u32 addend)
 {
 	u32 value;
 	int limit;
@@ -109,8 +110,8 @@ static int stmmac_config_addend(void __iomem *ioaddr, u32 addend)
 	return 0;
 }
 
-static int stmmac_adjust_systime(void __iomem *ioaddr, u32 sec, u32 nsec,
-				 int add_sub, int gmac4)
+static int adjust_systime(void __iomem *ioaddr, u32 sec, u32 nsec,
+		int add_sub, int gmac4)
 {
 	u32 value;
 	int limit;
@@ -152,7 +153,7 @@ static int stmmac_adjust_systime(void __iomem *ioaddr, u32 sec, u32 nsec,
 	return 0;
 }
 
-static u64 stmmac_get_systime(void __iomem *ioaddr)
+static void get_systime(void __iomem *ioaddr, u64 *systime)
 {
 	u64 ns;
 
@@ -161,14 +162,15 @@ static u64 stmmac_get_systime(void __iomem *ioaddr)
 	/* Get the TSS and convert sec time value to nanosecond */
 	ns += readl(ioaddr + PTP_STSR) * 1000000000ULL;
 
-	return ns;
+	if (systime)
+		*systime = ns;
 }
 
 const struct stmmac_hwtimestamp stmmac_ptp = {
-	.config_hw_tstamping = stmmac_config_hw_tstamping,
-	.init_systime = stmmac_init_systime,
-	.config_sub_second_increment = stmmac_config_sub_second_increment,
-	.config_addend = stmmac_config_addend,
-	.adjust_systime = stmmac_adjust_systime,
-	.get_systime = stmmac_get_systime,
+	.config_hw_tstamping = config_hw_tstamping,
+	.init_systime = init_systime,
+	.config_sub_second_increment = config_sub_second_increment,
+	.config_addend = config_addend,
+	.adjust_systime = adjust_systime,
+	.get_systime = get_systime,
 };

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -707,18 +707,18 @@ static int stmmac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
 	priv->hwts_tx_en = config.tx_type == HWTSTAMP_TX_ON;
 
 	if (!priv->hwts_tx_en && !priv->hwts_rx_en)
-		priv->hw->ptp->config_hw_tstamping(priv->ptpaddr, 0);
+		stmmac_config_hw_tstamping(priv, priv->ptpaddr, 0);
 	else {
 		value = (PTP_TCR_TSENA | PTP_TCR_TSCFUPDT | PTP_TCR_TSCTRLSSR |
 			 tstamp_all | ptp_v2 | ptp_over_ethernet |
 			 ptp_over_ipv6_udp | ptp_over_ipv4_udp | ts_event_en |
 			 ts_master_en | snap_type_sel);
-		priv->hw->ptp->config_hw_tstamping(priv->ptpaddr, value);
+		stmmac_config_hw_tstamping(priv, priv->ptpaddr, value);
 
 		/* program Sub Second Increment reg */
-		sec_inc = priv->hw->ptp->config_sub_second_increment(
-			priv->ptpaddr, priv->plat->clk_ptp_rate,
-			priv->plat->has_gmac4);
+		stmmac_config_sub_second_increment(priv,
+				priv->ptpaddr, priv->plat->clk_ptp_rate,
+				priv->plat->has_gmac4, &sec_inc);
 		temp = div_u64(1000000000ULL, sec_inc);
 
 		/* calculate default added value:
@@ -728,15 +728,14 @@ static int stmmac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
 		 */
 		temp = (u64)(temp << 32);
 		priv->default_addend = div_u64(temp, priv->plat->clk_ptp_rate);
-		priv->hw->ptp->config_addend(priv->ptpaddr,
-					     priv->default_addend);
+		stmmac_config_addend(priv, priv->ptpaddr, priv->default_addend);
 
 		/* initialize system time */
 		ktime_get_real_ts64(&now);
 
 		/* lower 32 bits of tv_sec are safe until y2106 */
-		priv->hw->ptp->init_systime(priv->ptpaddr, (u32)now.tv_sec,
-					    now.tv_nsec);
+		stmmac_init_systime(priv, priv->ptpaddr,
+				(u32)now.tv_sec, now.tv_nsec);
 	}
 
 	return copy_to_user(ifr->ifr_data, &config,

drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c

@@ -49,9 +49,7 @@ static int stmmac_adjust_freq(struct ptp_clock_info *ptp, s32 ppb)
 	addend = neg_adj ? (addend - diff) : (addend + diff);
 
 	spin_lock_irqsave(&priv->ptp_lock, flags);
-
-	priv->hw->ptp->config_addend(priv->ptpaddr, addend);
-
+	stmmac_config_addend(priv, priv->ptpaddr, addend);
 	spin_unlock_irqrestore(&priv->ptp_lock, flags);
 
 	return 0;
@@ -84,10 +82,8 @@ static int stmmac_adjust_time(struct ptp_clock_info *ptp, s64 delta)
 	nsec = reminder;
 
 	spin_lock_irqsave(&priv->ptp_lock, flags);
-
-	priv->hw->ptp->adjust_systime(priv->ptpaddr, sec, nsec, neg_adj,
-				      priv->plat->has_gmac4);
-
+	stmmac_adjust_systime(priv, priv->ptpaddr, sec, nsec, neg_adj,
+			priv->plat->has_gmac4);
 	spin_unlock_irqrestore(&priv->ptp_lock, flags);
 
 	return 0;
@@ -110,9 +106,7 @@ static int stmmac_get_time(struct ptp_clock_info *ptp, struct timespec64 *ts)
 	u64 ns;
 
 	spin_lock_irqsave(&priv->ptp_lock, flags);
-
-	ns = priv->hw->ptp->get_systime(priv->ptpaddr);
-
+	stmmac_get_systime(priv, priv->ptpaddr, &ns);
 	spin_unlock_irqrestore(&priv->ptp_lock, flags);
 
 	*ts = ns_to_timespec64(ns);
@@ -137,9 +131,7 @@ static int stmmac_set_time(struct ptp_clock_info *ptp,
 	unsigned long flags;
 
 	spin_lock_irqsave(&priv->ptp_lock, flags);
-
-	priv->hw->ptp->init_systime(priv->ptpaddr, ts->tv_sec, ts->tv_nsec);
-
+	stmmac_init_systime(priv, priv->ptpaddr, ts->tv_sec, ts->tv_nsec);
 	spin_unlock_irqrestore(&priv->ptp_lock, flags);
 
 	return 0;