amd-xgbe: Add hardware timestamp support
This patch adds support for Tx and Rx hardware timestamping.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h
index 9e24b29..8b6ad3e 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe.h
@@ -123,6 +123,9 @@
#include <linux/phy.h>
#include <linux/if_vlan.h>
#include <linux/bitops.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/clocksource.h>
+#include <linux/net_tstamp.h>
#define XGBE_DRV_NAME "amd-xgbe"
@@ -164,6 +167,16 @@
#define XGBE_PHY_NAME "amd_xgbe_phy"
#define XGBE_PRTAD 0
+/* Device-tree clock names */
+#define XGBE_DMA_CLOCK "dma_clk"
+#define XGBE_PTP_CLOCK "ptp_clk"
+
+/* Timestamp support - values based on 50MHz PTP clock
+ * 50MHz => 20 nsec
+ */
+#define XGBE_TSTAMP_SSINC 20
+#define XGBE_TSTAMP_SNSINC 0
+
/* Driver PMT macros */
#define XGMAC_DRIVER_CONTEXT 1
#define XGMAC_IOCTL_CONTEXT 2
@@ -214,6 +227,8 @@
unsigned short mss;
unsigned short vlan_ctag;
+
+ u64 rx_tstamp;
};
/* Common Rx and Tx descriptor mapping */
@@ -242,6 +257,20 @@
unsigned int interrupt; /* Interrupt indicator */
unsigned int mapped_as_page;
+
+ /* Incomplete receive save location. If the budget is exhausted
+ * or the last descriptor (last normal descriptor or a following
+ * context descriptor) has not been DMA'd yet the current state
+ * of the receive processing needs to be saved.
+ */
+ unsigned int state_saved;
+ struct {
+ unsigned int incomplete;
+ unsigned int context_next;
+ struct sk_buff *skb;
+ unsigned int len;
+ unsigned int error;
+ } state;
};
struct xgbe_ring {
@@ -467,6 +496,14 @@
void (*rx_mmc_int)(struct xgbe_prv_data *);
void (*tx_mmc_int)(struct xgbe_prv_data *);
void (*read_mmc_stats)(struct xgbe_prv_data *);
+
+ /* For Timestamp config */
+ int (*config_tstamp)(struct xgbe_prv_data *, unsigned int);
+ void (*update_tstamp_addend)(struct xgbe_prv_data *, unsigned int);
+ void (*set_tstamp_time)(struct xgbe_prv_data *, unsigned int sec,
+ unsigned int nsec);
+ u64 (*get_tstamp_time)(struct xgbe_prv_data *);
+ u64 (*get_tx_tstamp)(struct xgbe_prv_data *);
};
struct xgbe_desc_if {
@@ -607,8 +644,21 @@
/* Filtering support */
unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
- /* System clock value used for Rx watchdog */
- struct clk *sysclock;
+ /* Device clocks */
+ struct clk *sysclk;
+ struct clk *ptpclk;
+
+ /* Timestamp support */
+ spinlock_t tstamp_lock;
+ struct ptp_clock_info ptp_clock_info;
+ struct ptp_clock *ptp_clock;
+ struct hwtstamp_config tstamp_config;
+ struct cyclecounter tstamp_cc;
+ struct timecounter tstamp_tc;
+ unsigned int tstamp_addend;
+ struct work_struct tx_tstamp_work;
+ struct sk_buff *tx_tstamp_skb;
+ u64 tx_tstamp;
/* Hardware features of the device */
struct xgbe_hw_features hw_feat;
@@ -639,6 +689,8 @@
int xgbe_mdio_register(struct xgbe_prv_data *);
void xgbe_mdio_unregister(struct xgbe_prv_data *);
void xgbe_dump_phy_registers(struct xgbe_prv_data *);
+void xgbe_ptp_register(struct xgbe_prv_data *);
+void xgbe_ptp_unregister(struct xgbe_prv_data *);
void xgbe_dump_tx_desc(struct xgbe_ring *, unsigned int, unsigned int,
unsigned int);
void xgbe_dump_rx_desc(struct xgbe_ring *, struct xgbe_ring_desc *,