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Message-ID: <1354506171-1646-1-git-send-email-mchan@broadcom.com>
Date: Sun, 2 Dec 2012 19:42:48 -0800
From: "Michael Chan" <mchan@...adcom.com>
To: davem@...emloft.net
cc: netdev@...r.kernel.org, nsujir@...adcom.com
Subject: [PATCH 1/4 net-next] tg3: PTP - Add header definitions,
initialization and hw access functions.
From: Matt Carlson <mcarlson@...adcom.com>
This patch adds code to register/unregister the ptp clock and write
the reference clock. If a chip reset is performed, the hwclock is
reinitialized with the adjusted kernel time
Signed-off-by: Nithin Nayak Sujir <nsujir@...adcom.com>
Signed-off-by: Michael Chan <mchan@...adcom.com>
---
drivers/net/ethernet/broadcom/Kconfig | 1 +
drivers/net/ethernet/broadcom/tg3.c | 84 +++++++++++++++++++++++++++++++--
drivers/net/ethernet/broadcom/tg3.h | 60 ++++++++++++++++++++++-
3 files changed, 137 insertions(+), 8 deletions(-)
diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig
index 4bd416b..f552673 100644
--- a/drivers/net/ethernet/broadcom/Kconfig
+++ b/drivers/net/ethernet/broadcom/Kconfig
@@ -102,6 +102,7 @@ config TIGON3
depends on PCI
select PHYLIB
select HWMON
+ select PTP_1588_CLOCK
---help---
This driver supports Broadcom Tigon3 based gigabit Ethernet cards.
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 5cc976d..38047a9 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -54,6 +54,9 @@
#include <asm/byteorder.h>
#include <linux/uaccess.h>
+#include <uapi/linux/net_tstamp.h>
+#include <linux/ptp_clock_kernel.h>
+
#ifdef CONFIG_SPARC
#include <asm/idprom.h>
#include <asm/prom.h>
@@ -5516,6 +5519,57 @@ static int tg3_setup_phy(struct tg3 *tp, int force_reset)
return err;
}
+static void tg3_refclk_write(struct tg3 *tp, u64 newval)
+{
+ tw32(TG3_EAV_REF_CLCK_CTL, TG3_EAV_REF_CLCK_CTL_STOP);
+ tw32(TG3_EAV_REF_CLCK_LSB, newval & 0xffffffff);
+ tw32(TG3_EAV_REF_CLCK_MSB, newval >> 32);
+ tw32_f(TG3_EAV_REF_CLCK_CTL, TG3_EAV_REF_CLCK_CTL_RESUME);
+}
+
+static const struct ptp_clock_info tg3_ptp_caps = {
+ .owner = THIS_MODULE,
+ .name = "",
+ .max_adj = 0,
+ .n_alarm = 0,
+ .n_ext_ts = 0,
+ .n_per_out = 0,
+ .pps = 0,
+};
+
+static void tg3_ptp_init(struct tg3 *tp)
+{
+ if (!tg3_flag(tp, PTP_CAPABLE))
+ return;
+
+ /* Initialize the hardware clock to the system time. */
+ tg3_refclk_write(tp, ktime_to_ns(ktime_get_real()));
+ tp->ptp_adjust = 0;
+
+ tp->ptp_info = tg3_ptp_caps;
+ strncpy(tp->ptp_info.name, tp->dev->name, IFNAMSIZ);
+}
+
+static void tg3_ptp_resume(struct tg3 *tp)
+{
+ if (!tg3_flag(tp, PTP_CAPABLE))
+ return;
+
+ tg3_refclk_write(tp, ktime_to_ns(ktime_get_real()) + tp->ptp_adjust);
+ tp->ptp_adjust = 0;
+}
+
+static void tg3_ptp_fini(struct tg3 *tp)
+{
+ if (!tg3_flag(tp, PTP_CAPABLE) ||
+ !tp->ptp_clock)
+ return;
+
+ ptp_clock_unregister(tp->ptp_clock);
+ tp->ptp_clock = NULL;
+ tp->ptp_adjust = 0;
+}
+
static inline int tg3_irq_sync(struct tg3 *tp)
{
return tp->irq_sync;
@@ -6527,6 +6581,8 @@ static inline void tg3_netif_stop(struct tg3 *tp)
static inline void tg3_netif_start(struct tg3 *tp)
{
+ tg3_ptp_resume(tp);
+
/* NOTE: unconditional netif_tx_wake_all_queues is only
* appropriate so long as all callers are assured to
* have free tx slots (such as after tg3_init_hw)
@@ -10364,7 +10420,8 @@ static void tg3_ints_fini(struct tg3 *tp)
tg3_flag_clear(tp, ENABLE_TSS);
}
-static int tg3_start(struct tg3 *tp, bool reset_phy, bool test_irq)
+static int tg3_start(struct tg3 *tp, bool reset_phy, bool test_irq,
+ bool init)
{
struct net_device *dev = tp->dev;
int i, err;
@@ -10443,6 +10500,12 @@ static int tg3_start(struct tg3 *tp, bool reset_phy, bool test_irq)
tg3_flag_set(tp, INIT_COMPLETE);
tg3_enable_ints(tp);
+ if (init)
+ tg3_ptp_init(tp);
+ else
+ tg3_ptp_resume(tp);
+
+
tg3_full_unlock(tp);
netif_tx_start_all_queues(dev);
@@ -10540,11 +10603,19 @@ static int tg3_open(struct net_device *dev)
tg3_full_unlock(tp);
- err = tg3_start(tp, true, true);
+ err = tg3_start(tp, true, true, true);
if (err) {
tg3_frob_aux_power(tp, false);
pci_set_power_state(tp->pdev, PCI_D3hot);
}
+
+ if (tg3_flag(tp, PTP_CAPABLE)) {
+ tp->ptp_clock = ptp_clock_register(&tp->ptp_info,
+ &tp->pdev->dev);
+ if (IS_ERR(tp->ptp_clock))
+ tp->ptp_clock = NULL;
+ }
+
return err;
}
@@ -10552,6 +10623,8 @@ static int tg3_close(struct net_device *dev)
{
struct tg3 *tp = netdev_priv(dev);
+ tg3_ptp_fini(tp);
+
tg3_stop(tp);
/* Clear stats across close / open calls */
@@ -11454,7 +11527,7 @@ static int tg3_set_channels(struct net_device *dev,
tg3_carrier_off(tp);
- tg3_start(tp, true, false);
+ tg3_start(tp, true, false, false);
return 0;
}
@@ -12507,7 +12580,6 @@ static void tg3_self_test(struct net_device *dev, struct ethtool_test *etest,
}
tg3_full_lock(tp, irq_sync);
-
tg3_halt(tp, RESET_KIND_SUSPEND, 1);
err = tg3_nvram_lock(tp);
tg3_halt_cpu(tp, RX_CPU_BASE);
@@ -16598,8 +16670,8 @@ static void tg3_io_resume(struct pci_dev *pdev)
tg3_full_lock(tp, 0);
tg3_flag_set(tp, INIT_COMPLETE);
err = tg3_restart_hw(tp, 1);
- tg3_full_unlock(tp);
if (err) {
+ tg3_full_unlock(tp);
netdev_err(netdev, "Cannot restart hardware after reset.\n");
goto done;
}
@@ -16610,6 +16682,8 @@ static void tg3_io_resume(struct pci_dev *pdev)
tg3_netif_start(tp);
+ tg3_full_unlock(tp);
+
tg3_phy_start(tp);
done:
diff --git a/drivers/net/ethernet/broadcom/tg3.h b/drivers/net/ethernet/broadcom/tg3.h
index 4534804..d330e81 100644
--- a/drivers/net/ethernet/broadcom/tg3.h
+++ b/drivers/net/ethernet/broadcom/tg3.h
@@ -772,7 +772,10 @@
#define SG_DIG_MAC_ACK_STATUS 0x00000004
#define SG_DIG_AUTONEG_COMPLETE 0x00000002
#define SG_DIG_AUTONEG_ERROR 0x00000001
-/* 0x5b8 --> 0x600 unused */
+#define TG3_TX_TSTAMP_LSB 0x000005c0
+#define TG3_TX_TSTAMP_MSB 0x000005c4
+#define TG3_TSTAMP_MASK 0x7fffffffffffffff
+/* 0x5c8 --> 0x600 unused */
#define MAC_TX_MAC_STATE_BASE 0x00000600 /* 16 bytes */
#define MAC_RX_MAC_STATE_BASE 0x00000610 /* 20 bytes */
/* 0x624 --> 0x670 unused */
@@ -789,7 +792,36 @@
#define MAC_RSS_HASH_KEY_7 0x0000068c
#define MAC_RSS_HASH_KEY_8 0x00000690
#define MAC_RSS_HASH_KEY_9 0x00000694
-/* 0x698 --> 0x800 unused */
+/* 0x698 --> 0x6b0 unused */
+
+#define TG3_RX_TSTAMP_LSB 0x000006b0
+#define TG3_RX_TSTAMP_MSB 0x000006b4
+/* 0x6b8 --> 0x6c8 unused */
+
+#define TG3_RX_PTP_CTL 0x000006c8
+#define TG3_RX_PTP_CTL_SYNC_EVNT 0x00000001
+#define TG3_RX_PTP_CTL_DELAY_REQ 0x00000002
+#define TG3_RX_PTP_CTL_PDLAY_REQ 0x00000004
+#define TG3_RX_PTP_CTL_PDLAY_RES 0x00000008
+#define TG3_RX_PTP_CTL_ALL_V1_EVENTS (TG3_RX_PTP_CTL_SYNC_EVNT | \
+ TG3_RX_PTP_CTL_DELAY_REQ)
+#define TG3_RX_PTP_CTL_ALL_V2_EVENTS (TG3_RX_PTP_CTL_SYNC_EVNT | \
+ TG3_RX_PTP_CTL_DELAY_REQ | \
+ TG3_RX_PTP_CTL_PDLAY_REQ | \
+ TG3_RX_PTP_CTL_PDLAY_RES)
+#define TG3_RX_PTP_CTL_FOLLOW_UP 0x00000100
+#define TG3_RX_PTP_CTL_DELAY_RES 0x00000200
+#define TG3_RX_PTP_CTL_PDRES_FLW_UP 0x00000400
+#define TG3_RX_PTP_CTL_ANNOUNCE 0x00000800
+#define TG3_RX_PTP_CTL_SIGNALING 0x00001000
+#define TG3_RX_PTP_CTL_MANAGEMENT 0x00002000
+#define TG3_RX_PTP_CTL_RX_PTP_V2_L2_EN 0x00800000
+#define TG3_RX_PTP_CTL_RX_PTP_V2_L4_EN 0x01000000
+#define TG3_RX_PTP_CTL_RX_PTP_V2_EN (TG3_RX_PTP_CTL_RX_PTP_V2_L2_EN | \
+ TG3_RX_PTP_CTL_RX_PTP_V2_L4_EN)
+#define TG3_RX_PTP_CTL_RX_PTP_V1_EN 0x02000000
+#define TG3_RX_PTP_CTL_HWTS_INTERLOCK 0x04000000
+/* 0x6cc --> 0x800 unused */
#define MAC_TX_STATS_OCTETS 0x00000800
#define MAC_TX_STATS_RESV1 0x00000804
@@ -1669,6 +1701,7 @@
#define GRC_MODE_HOST_STACKUP 0x00010000
#define GRC_MODE_HOST_SENDBDS 0x00020000
#define GRC_MODE_HTX2B_ENABLE 0x00040000
+#define GRC_MODE_TIME_SYNC_ENABLE 0x00080000
#define GRC_MODE_NO_TX_PHDR_CSUM 0x00100000
#define GRC_MODE_NVRAM_WR_ENABLE 0x00200000
#define GRC_MODE_PCIE_TL_SEL 0x00000000
@@ -1771,7 +1804,17 @@
#define GRC_VCPU_EXT_CTRL_DISABLE_WOL 0x20000000
#define GRC_FASTBOOT_PC 0x00006894 /* 5752, 5755, 5787 */
-/* 0x6c00 --> 0x7000 unused */
+#define TG3_EAV_REF_CLCK_LSB 0x00006900
+#define TG3_EAV_REF_CLCK_MSB 0x00006904
+#define TG3_EAV_REF_CLCK_CTL 0x00006908
+#define TG3_EAV_REF_CLCK_CTL_STOP 0x00000002
+#define TG3_EAV_REF_CLCK_CTL_RESUME 0x00000004
+#define TG3_EAV_REF_CLK_CORRECT_CTL 0x00006928
+#define TG3_EAV_REF_CLK_CORRECT_EN (1 << 31)
+#define TG3_EAV_REF_CLK_CORRECT_NEG (1 << 30)
+
+#define TG3_EAV_REF_CLK_CORRECT_MASK 0xffffff
+/* 0x690c --> 0x7000 unused */
/* NVRAM Control registers */
#define NVRAM_CMD 0x00007000
@@ -2439,6 +2482,7 @@ struct tg3_tx_buffer_desc {
#define TXD_FLAG_IP_FRAG 0x0008
#define TXD_FLAG_JMB_PKT 0x0008
#define TXD_FLAG_IP_FRAG_END 0x0010
+#define TXD_FLAG_HWTSTAMP 0x0020
#define TXD_FLAG_VLAN 0x0040
#define TXD_FLAG_COAL_NOW 0x0080
#define TXD_FLAG_CPU_PRE_DMA 0x0100
@@ -2480,6 +2524,9 @@ struct tg3_rx_buffer_desc {
#define RXD_FLAG_IP_CSUM 0x1000
#define RXD_FLAG_TCPUDP_CSUM 0x2000
#define RXD_FLAG_IS_TCP 0x4000
+#define RXD_FLAG_PTPSTAT_MASK 0x0210
+#define RXD_FLAG_PTPSTAT_PTPV1 0x0010
+#define RXD_FLAG_PTPSTAT_PTPV2 0x0200
u32 ip_tcp_csum;
#define RXD_IPCSUM_MASK 0xffff0000
@@ -2970,9 +3017,11 @@ enum TG3_FLAGS {
TG3_FLAG_USE_JUMBO_BDFLAG,
TG3_FLAG_L1PLLPD_EN,
TG3_FLAG_APE_HAS_NCSI,
+ TG3_FLAG_TX_TSTAMP_EN,
TG3_FLAG_4K_FIFO_LIMIT,
TG3_FLAG_5719_RDMA_BUG,
TG3_FLAG_RESET_TASK_PENDING,
+ TG3_FLAG_PTP_CAPABLE,
TG3_FLAG_5705_PLUS,
TG3_FLAG_IS_5788,
TG3_FLAG_5750_PLUS,
@@ -3041,6 +3090,10 @@ struct tg3 {
u32 coal_now;
u32 msg_enable;
+ struct ptp_clock_info ptp_info;
+ struct ptp_clock *ptp_clock;
+ s64 ptp_adjust;
+
/* begin "tx thread" cacheline section */
void (*write32_tx_mbox) (struct tg3 *, u32,
u32);
@@ -3108,6 +3161,7 @@ struct tg3 {
u32 dma_rwctrl;
u32 coalesce_mode;
u32 pwrmgmt_thresh;
+ u32 rxptpctl;
/* PCI block */
u32 pci_chip_rev_id;
--
1.7.1
--
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