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Message-ID: <20140725211103.32358.37295.stgit@tlendack-t1.amdoffice.net>
Date: Fri, 25 Jul 2014 16:11:04 -0500
From: Tom Lendacky <thomas.lendacky@....com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>
Subject: [PATCH net-next 2/8] amd-xgbe: Add hardware timestamp support
This patch adds support for Tx and Rx hardware timestamping.
Signed-off-by: Tom Lendacky <thomas.lendacky@....com>
---
Documentation/devicetree/bindings/net/amd-xgbe.txt | 16 +
drivers/net/ethernet/amd/Kconfig | 1
drivers/net/ethernet/amd/xgbe/Makefile | 3
drivers/net/ethernet/amd/xgbe/xgbe-common.h | 71 ++++
drivers/net/ethernet/amd/xgbe/xgbe-desc.c | 9
drivers/net/ethernet/amd/xgbe/xgbe-dev.c | 167 ++++++++-
drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 388 ++++++++++++++++++--
drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c | 39 ++
drivers/net/ethernet/amd/xgbe/xgbe-main.c | 21 +
drivers/net/ethernet/amd/xgbe/xgbe-ptp.c | 313 ++++++++++++++++
drivers/net/ethernet/amd/xgbe/xgbe.h | 56 +++
11 files changed, 1026 insertions(+), 58 deletions(-)
create mode 100644 drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
diff --git a/Documentation/devicetree/bindings/net/amd-xgbe.txt b/Documentation/devicetree/bindings/net/amd-xgbe.txt
index f6db1ba..41354f7 100644
--- a/Documentation/devicetree/bindings/net/amd-xgbe.txt
+++ b/Documentation/devicetree/bindings/net/amd-xgbe.txt
@@ -8,10 +8,14 @@ Required properties:
- interrupt-parent: Should be the phandle for the interrupt controller
that services interrupts for this device
- interrupts: Should contain the amd-xgbe interrupt
-- clocks: Should be the DMA clock for the amd-xgbe device (used for
- calculating the correct Rx interrupt watchdog timer value on a DMA
- channel for coalescing)
-- clock-names: Should be the name of the DMA clock, "dma_clk"
+- clocks:
+ - DMA clock for the amd-xgbe device (used for calculating the
+ correct Rx interrupt watchdog timer value on a DMA channel
+ for coalescing)
+ - PTP clock for the amd-xgbe device
+- clock-names: Should be the names of the clocks
+ - "dma_clk" for the DMA clock
+ - "ptp_clk" for the PTP clock
- phy-handle: See ethernet.txt file in the same directory
- phy-mode: See ethernet.txt file in the same directory
@@ -27,8 +31,8 @@ Example:
<0 0xe0780000 0 0x80000>;
interrupt-parent = <&gic>;
interrupts = <0 325 4>;
- clocks = <&xgbe_clk>;
- clock-names = "dma_clk";
+ clocks = <&xgbe_dma_clk>, <&xgbe_ptp_clk>;
+ clock-names = "dma_clk", "ptp_clk";
phy-handle = <&phy>;
phy-mode = "xgmii";
mac-address = [ 02 a1 a2 a3 a4 a5 ];
diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig
index 6e314db..98ef8ff 100644
--- a/drivers/net/ethernet/amd/Kconfig
+++ b/drivers/net/ethernet/amd/Kconfig
@@ -184,6 +184,7 @@ config AMD_XGBE
select AMD_XGBE_PHY
select BITREVERSE
select CRC32
+ select PTP_1588_CLOCK
---help---
This driver supports the AMD 10GbE Ethernet device found on an
AMD SoC.
diff --git a/drivers/net/ethernet/amd/xgbe/Makefile b/drivers/net/ethernet/amd/xgbe/Makefile
index 26cf9af..66c49b4 100644
--- a/drivers/net/ethernet/amd/xgbe/Makefile
+++ b/drivers/net/ethernet/amd/xgbe/Makefile
@@ -1,6 +1,7 @@
obj-$(CONFIG_AMD_XGBE) += amd-xgbe.o
amd-xgbe-objs := xgbe-main.o xgbe-drv.o xgbe-dev.o \
- xgbe-desc.o xgbe-ethtool.o xgbe-mdio.o
+ xgbe-desc.o xgbe-ethtool.o xgbe-mdio.o \
+ xgbe-ptp.o
amd-xgbe-$(CONFIG_DEBUG_FS) += xgbe-debugfs.o
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
index 7ec80ac..646702c 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
@@ -307,6 +307,16 @@
#define MAC_MACA0LR 0x0304
#define MAC_MACA1HR 0x0308
#define MAC_MACA1LR 0x030c
+#define MAC_TSCR 0x0d00
+#define MAC_SSIR 0x0d04
+#define MAC_STSR 0x0d08
+#define MAC_STNR 0x0d0c
+#define MAC_STSUR 0x0d10
+#define MAC_STNUR 0x0d14
+#define MAC_TSAR 0x0d18
+#define MAC_TSSR 0x0d20
+#define MAC_TXSNR 0x0d30
+#define MAC_TXSSR 0x0d34
#define MAC_QTFCR_INC 4
#define MAC_MACA_INC 4
@@ -373,12 +383,16 @@
#define MAC_HWF2R_TXCHCNT_WIDTH 4
#define MAC_HWF2R_TXQCNT_INDEX 6
#define MAC_HWF2R_TXQCNT_WIDTH 4
+#define MAC_IER_TSIE_INDEX 12
+#define MAC_IER_TSIE_WIDTH 1
#define MAC_ISR_MMCRXIS_INDEX 9
#define MAC_ISR_MMCRXIS_WIDTH 1
#define MAC_ISR_MMCTXIS_INDEX 10
#define MAC_ISR_MMCTXIS_WIDTH 1
#define MAC_ISR_PMTIS_INDEX 4
#define MAC_ISR_PMTIS_WIDTH 1
+#define MAC_ISR_TSIS_INDEX 12
+#define MAC_ISR_TSIS_WIDTH 1
#define MAC_MACA1HR_AE_INDEX 31
#define MAC_MACA1HR_AE_WIDTH 1
#define MAC_PFR_HMC_INDEX 2
@@ -423,10 +437,48 @@
#define MAC_RFCR_RFE_WIDTH 1
#define MAC_RQC0R_RXQ0EN_INDEX 0
#define MAC_RQC0R_RXQ0EN_WIDTH 2
+#define MAC_SSIR_SNSINC_INDEX 8
+#define MAC_SSIR_SNSINC_WIDTH 8
+#define MAC_SSIR_SSINC_INDEX 16
+#define MAC_SSIR_SSINC_WIDTH 8
#define MAC_TCR_SS_INDEX 29
#define MAC_TCR_SS_WIDTH 2
#define MAC_TCR_TE_INDEX 0
#define MAC_TCR_TE_WIDTH 1
+#define MAC_TSCR_AV8021ASMEN_INDEX 28
+#define MAC_TSCR_AV8021ASMEN_WIDTH 1
+#define MAC_TSCR_SNAPTYPSEL_INDEX 16
+#define MAC_TSCR_SNAPTYPSEL_WIDTH 2
+#define MAC_TSCR_TSADDREG_INDEX 5
+#define MAC_TSCR_TSADDREG_WIDTH 1
+#define MAC_TSCR_TSCFUPDT_INDEX 1
+#define MAC_TSCR_TSCFUPDT_WIDTH 1
+#define MAC_TSCR_TSCTRLSSR_INDEX 9
+#define MAC_TSCR_TSCTRLSSR_WIDTH 1
+#define MAC_TSCR_TSENA_INDEX 0
+#define MAC_TSCR_TSENA_WIDTH 1
+#define MAC_TSCR_TSENALL_INDEX 8
+#define MAC_TSCR_TSENALL_WIDTH 1
+#define MAC_TSCR_TSEVNTENA_INDEX 14
+#define MAC_TSCR_TSEVNTENA_WIDTH 1
+#define MAC_TSCR_TSINIT_INDEX 2
+#define MAC_TSCR_TSINIT_WIDTH 1
+#define MAC_TSCR_TSIPENA_INDEX 11
+#define MAC_TSCR_TSIPENA_WIDTH 1
+#define MAC_TSCR_TSIPV4ENA_INDEX 13
+#define MAC_TSCR_TSIPV4ENA_WIDTH 1
+#define MAC_TSCR_TSIPV6ENA_INDEX 12
+#define MAC_TSCR_TSIPV6ENA_WIDTH 1
+#define MAC_TSCR_TSMSTRENA_INDEX 15
+#define MAC_TSCR_TSMSTRENA_WIDTH 1
+#define MAC_TSCR_TSVER2ENA_INDEX 10
+#define MAC_TSCR_TSVER2ENA_WIDTH 1
+#define MAC_TSCR_TXTSSTSM_INDEX 24
+#define MAC_TSCR_TXTSSTSM_WIDTH 1
+#define MAC_TSSR_TXTSC_INDEX 15
+#define MAC_TSSR_TXTSC_WIDTH 1
+#define MAC_TXSNR_TXTSSTSMIS_INDEX 31
+#define MAC_TXSNR_TXTSSTSMIS_WIDTH 1
#define MAC_VLANHTR_VLHT_INDEX 0
#define MAC_VLANHTR_VLHT_WIDTH 16
#define MAC_VLANIR_VLTI_INDEX 20
@@ -778,9 +830,19 @@
#define RX_PACKET_ATTRIBUTES_VLAN_CTAG_WIDTH 1
#define RX_PACKET_ATTRIBUTES_INCOMPLETE_INDEX 2
#define RX_PACKET_ATTRIBUTES_INCOMPLETE_WIDTH 1
+#define RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_INDEX 3
+#define RX_PACKET_ATTRIBUTES_CONTEXT_NEXT_WIDTH 1
+#define RX_PACKET_ATTRIBUTES_CONTEXT_INDEX 4
+#define RX_PACKET_ATTRIBUTES_CONTEXT_WIDTH 1
+#define RX_PACKET_ATTRIBUTES_RX_TSTAMP_INDEX 5
+#define RX_PACKET_ATTRIBUTES_RX_TSTAMP_WIDTH 1
#define RX_NORMAL_DESC0_OVT_INDEX 0
#define RX_NORMAL_DESC0_OVT_WIDTH 16
+#define RX_NORMAL_DESC3_CDA_INDEX 27
+#define RX_NORMAL_DESC3_CDA_WIDTH 1
+#define RX_NORMAL_DESC3_CTXT_INDEX 30
+#define RX_NORMAL_DESC3_CTXT_WIDTH 1
#define RX_NORMAL_DESC3_ES_INDEX 15
#define RX_NORMAL_DESC3_ES_WIDTH 1
#define RX_NORMAL_DESC3_ETLT_INDEX 16
@@ -794,12 +856,19 @@
#define RX_NORMAL_DESC3_PL_INDEX 0
#define RX_NORMAL_DESC3_PL_WIDTH 14
+#define RX_CONTEXT_DESC3_TSA_INDEX 4
+#define RX_CONTEXT_DESC3_TSA_WIDTH 1
+#define RX_CONTEXT_DESC3_TSD_INDEX 6
+#define RX_CONTEXT_DESC3_TSD_WIDTH 1
+
#define TX_PACKET_ATTRIBUTES_CSUM_ENABLE_INDEX 0
#define TX_PACKET_ATTRIBUTES_CSUM_ENABLE_WIDTH 1
#define TX_PACKET_ATTRIBUTES_TSO_ENABLE_INDEX 1
#define TX_PACKET_ATTRIBUTES_TSO_ENABLE_WIDTH 1
#define TX_PACKET_ATTRIBUTES_VLAN_CTAG_INDEX 2
#define TX_PACKET_ATTRIBUTES_VLAN_CTAG_WIDTH 1
+#define TX_PACKET_ATTRIBUTES_PTP_INDEX 3
+#define TX_PACKET_ATTRIBUTES_PTP_WIDTH 1
#define TX_CONTEXT_DESC2_MSS_INDEX 0
#define TX_CONTEXT_DESC2_MSS_WIDTH 15
@@ -816,6 +885,8 @@
#define TX_NORMAL_DESC2_HL_B1L_WIDTH 14
#define TX_NORMAL_DESC2_IC_INDEX 31
#define TX_NORMAL_DESC2_IC_WIDTH 1
+#define TX_NORMAL_DESC2_TTSE_INDEX 30
+#define TX_NORMAL_DESC2_TTSE_WIDTH 1
#define TX_NORMAL_DESC2_VTIR_INDEX 14
#define TX_NORMAL_DESC2_VTIR_WIDTH 2
#define TX_NORMAL_DESC3_CIC_INDEX 16
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-desc.c b/drivers/net/ethernet/amd/xgbe/xgbe-desc.c
index a9ce56d..1c5d62e 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-desc.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-desc.c
@@ -359,6 +359,15 @@ static void xgbe_unmap_skb(struct xgbe_prv_data *pdata,
rdata->len = 0;
rdata->interrupt = 0;
rdata->mapped_as_page = 0;
+
+ if (rdata->state_saved) {
+ rdata->state_saved = 0;
+ rdata->state.incomplete = 0;
+ rdata->state.context_next = 0;
+ rdata->state.skb = NULL;
+ rdata->state.len = 0;
+ rdata->state.error = 0;
+ }
}
static int xgbe_map_tx_skb(struct xgbe_channel *channel, struct sk_buff *skb)
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
index 699cff5..19c2c3f 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-dev.c
@@ -131,7 +131,7 @@ static unsigned int xgbe_usec_to_riwt(struct xgbe_prv_data *pdata,
DBGPR("-->xgbe_usec_to_riwt\n");
- rate = clk_get_rate(pdata->sysclock);
+ rate = clk_get_rate(pdata->sysclk);
/*
* Convert the input usec value to the watchdog timer value. Each
@@ -154,7 +154,7 @@ static unsigned int xgbe_riwt_to_usec(struct xgbe_prv_data *pdata,
DBGPR("-->xgbe_riwt_to_usec\n");
- rate = clk_get_rate(pdata->sysclock);
+ rate = clk_get_rate(pdata->sysclk);
/*
* Convert the input watchdog timer value to the usec value. Each
@@ -492,8 +492,12 @@ static void xgbe_enable_mtl_interrupts(struct xgbe_prv_data *pdata)
static void xgbe_enable_mac_interrupts(struct xgbe_prv_data *pdata)
{
- /* No MAC interrupts to be enabled */
- XGMAC_IOWRITE(pdata, MAC_IER, 0);
+ unsigned int mac_ier = 0;
+
+ /* Enable Timestamp interrupt */
+ XGMAC_SET_BITS(mac_ier, MAC_IER, TSIE, 1);
+
+ XGMAC_IOWRITE(pdata, MAC_IER, mac_ier);
/* Enable all counter interrupts */
XGMAC_IOWRITE_BITS(pdata, MMC_RIER, ALL_INTERRUPTS, 0xff);
@@ -1012,6 +1016,131 @@ static void xgbe_rx_desc_init(struct xgbe_channel *channel)
DBGPR("<--rx_desc_init\n");
}
+static void xgbe_update_tstamp_addend(struct xgbe_prv_data *pdata,
+ unsigned int addend)
+{
+ DBGPR("-->%s\n", __func__);
+
+ /* Set the addend register value and tell the device */
+ XGMAC_IOWRITE(pdata, MAC_TSAR, addend);
+ XGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSADDREG, 1);
+
+ /* Wait for addend update to complete */
+ while (XGMAC_IOREAD_BITS(pdata, MAC_TSCR, TSADDREG))
+ udelay(5);
+
+ DBGPR("<--%s\n", __func__);
+}
+
+static void xgbe_set_tstamp_time(struct xgbe_prv_data *pdata, unsigned int sec,
+ unsigned int nsec)
+{
+ DBGPR("-->%s\n", __func__);
+
+ /* Set the time values and tell the device */
+ XGMAC_IOWRITE(pdata, MAC_STSUR, sec);
+ XGMAC_IOWRITE(pdata, MAC_STNUR, nsec);
+ XGMAC_IOWRITE_BITS(pdata, MAC_TSCR, TSINIT, 1);
+
+ /* Wait for time update to complete */
+ while (XGMAC_IOREAD_BITS(pdata, MAC_TSCR, TSINIT))
+ udelay(5);
+
+ DBGPR("<--%s\n", __func__);
+}
+
+static u64 xgbe_get_tstamp_time(struct xgbe_prv_data *pdata)
+{
+ u64 nsec;
+
+ DBGPR("-->%s\n", __func__);
+
+ nsec = XGMAC_IOREAD(pdata, MAC_STSR);
+ nsec *= NSEC_PER_SEC;
+ nsec += XGMAC_IOREAD(pdata, MAC_STNR);
+
+ DBGPR("<--%s\n", __func__);
+
+ return nsec;
+}
+
+static u64 xgbe_get_tx_tstamp(struct xgbe_prv_data *pdata)
+{
+ unsigned int tx_snr;
+ u64 nsec;
+
+ DBGPR("-->%s\n", __func__);
+
+ tx_snr = XGMAC_IOREAD(pdata, MAC_TXSNR);
+ if (XGMAC_GET_BITS(tx_snr, MAC_TXSNR, TXTSSTSMIS))
+ return 0;
+
+ nsec = XGMAC_IOREAD(pdata, MAC_TXSSR);
+ nsec *= NSEC_PER_SEC;
+ nsec += tx_snr;
+
+ DBGPR("<--%s\n", __func__);
+
+ return nsec;
+}
+
+static void xgbe_get_rx_tstamp(struct xgbe_packet_data *packet,
+ struct xgbe_ring_desc *rdesc)
+{
+ u64 nsec;
+
+ DBGPR("-->%s\n", __func__);
+
+ if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_CONTEXT_DESC3, TSA) &&
+ !XGMAC_GET_BITS_LE(rdesc->desc3, RX_CONTEXT_DESC3, TSD)) {
+ nsec = le32_to_cpu(rdesc->desc1);
+ nsec <<= 32;
+ nsec |= le32_to_cpu(rdesc->desc0);
+ if (nsec != 0xffffffffffffffffULL) {
+ packet->rx_tstamp = nsec;
+ XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES,
+ RX_TSTAMP, 1);
+ }
+ }
+
+ DBGPR("<--%s\n", __func__);
+}
+
+static int xgbe_config_tstamp(struct xgbe_prv_data *pdata,
+ unsigned int mac_tscr)
+{
+ DBGPR("-->%s\n", __func__);
+
+ /* Set one nano-second accuracy */
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCTRLSSR, 1);
+
+ /* Set fine timestamp update */
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSCFUPDT, 1);
+
+ /* Overwrite earlier timestamps */
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TXTSSTSM, 1);
+
+ XGMAC_IOWRITE(pdata, MAC_TSCR, mac_tscr);
+
+ /* Exit if timestamping is not enabled */
+ if (!XGMAC_GET_BITS(mac_tscr, MAC_TSCR, TSENA))
+ return 0;
+
+ /* Initialize time registers */
+ XGMAC_IOWRITE_BITS(pdata, MAC_SSIR, SSINC, XGBE_TSTAMP_SSINC);
+ XGMAC_IOWRITE_BITS(pdata, MAC_SSIR, SNSINC, XGBE_TSTAMP_SNSINC);
+ xgbe_update_tstamp_addend(pdata, pdata->tstamp_addend);
+ xgbe_set_tstamp_time(pdata, 0, 0);
+
+ /* Initialize the timecounter */
+ timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc,
+ ktime_to_ns(ktime_get_real()));
+
+ DBGPR("<--%s\n", __func__);
+
+ return 0;
+}
+
static void xgbe_pre_xmit(struct xgbe_channel *channel)
{
struct xgbe_prv_data *pdata = channel->pdata;
@@ -1110,6 +1239,10 @@ static void xgbe_pre_xmit(struct xgbe_channel *channel)
XGMAC_SET_BITS_LE(rdesc->desc2, TX_NORMAL_DESC2, VTIR,
TX_NORMAL_DESC2_VLAN_INSERT);
+ /* Timestamp enablement check */
+ if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP))
+ XGMAC_SET_BITS_LE(rdesc->desc2, TX_NORMAL_DESC2, TTSE, 1);
+
/* Set IC bit based on Tx coalescing settings */
XGMAC_SET_BITS_LE(rdesc->desc2, TX_NORMAL_DESC2, IC, 1);
if (tx_coalesce && (!tx_frames ||
@@ -1245,6 +1378,25 @@ static int xgbe_dev_read(struct xgbe_channel *channel)
xgbe_dump_rx_desc(ring, rdesc, ring->cur);
#endif
+ if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, CTXT)) {
+ /* Timestamp Context Descriptor */
+ xgbe_get_rx_tstamp(packet, rdesc);
+
+ XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES,
+ CONTEXT, 1);
+ XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES,
+ CONTEXT_NEXT, 0);
+ return 0;
+ }
+
+ /* Normal Descriptor, be sure Context Descriptor bit is off */
+ XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, CONTEXT, 0);
+
+ /* Indicate if a Context Descriptor is next */
+ if (XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, CDA))
+ XGMAC_SET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES,
+ CONTEXT_NEXT, 1);
+
/* Get the packet length */
rdata->len = XGMAC_GET_BITS_LE(rdesc->desc3, RX_NORMAL_DESC3, PL);
@@ -2313,5 +2465,12 @@ void xgbe_init_function_ptrs_dev(struct xgbe_hw_if *hw_if)
hw_if->rx_mmc_int = xgbe_rx_mmc_int;
hw_if->read_mmc_stats = xgbe_read_mmc_stats;
+ /* For PTP config */
+ hw_if->config_tstamp = xgbe_config_tstamp;
+ hw_if->update_tstamp_addend = xgbe_update_tstamp_addend;
+ hw_if->set_tstamp_time = xgbe_set_tstamp_time;
+ hw_if->get_tstamp_time = xgbe_get_tstamp_time;
+ hw_if->get_tx_tstamp = xgbe_get_tx_tstamp;
+
DBGPR("<--xgbe_init_function_ptrs\n");
}
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index 344e6b1..346a6fd 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -121,6 +121,7 @@
#include <net/busy_poll.h>
#include <linux/clk.h>
#include <linux/if_ether.h>
+#include <linux/net_tstamp.h>
#include "xgbe.h"
#include "xgbe-common.h"
@@ -202,7 +203,7 @@ static irqreturn_t xgbe_isr(int irq, void *data)
struct xgbe_hw_if *hw_if = &pdata->hw_if;
struct xgbe_channel *channel;
unsigned int dma_isr, dma_ch_isr;
- unsigned int mac_isr;
+ unsigned int mac_isr, mac_tssr;
unsigned int i;
/* The DMA interrupt status register also reports MAC and MTL
@@ -255,6 +256,17 @@ static irqreturn_t xgbe_isr(int irq, void *data)
if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCRXIS))
hw_if->rx_mmc_int(pdata);
+
+ if (XGMAC_GET_BITS(mac_isr, MAC_ISR, TSIS)) {
+ mac_tssr = XGMAC_IOREAD(pdata, MAC_TSSR);
+
+ if (XGMAC_GET_BITS(mac_tssr, MAC_TSSR, TXTSC)) {
+ /* Read Tx Timestamp to clear interrupt */
+ pdata->tx_tstamp =
+ hw_if->get_tx_tstamp(pdata);
+ schedule_work(&pdata->tx_tstamp_work);
+ }
+ }
}
DBGPR(" DMA_ISR = %08x\n", XGMAC_IOREAD(pdata, DMA_ISR));
@@ -668,6 +680,209 @@ static void xgbe_restart(struct work_struct *work)
rtnl_unlock();
}
+static void xgbe_tx_tstamp(struct work_struct *work)
+{
+ struct xgbe_prv_data *pdata = container_of(work,
+ struct xgbe_prv_data,
+ tx_tstamp_work);
+ struct skb_shared_hwtstamps hwtstamps;
+ u64 nsec;
+ unsigned long flags;
+
+ DBGPR("-->%s\n", __func__);
+
+ if (pdata->tx_tstamp) {
+ nsec = timecounter_cyc2time(&pdata->tstamp_tc,
+ pdata->tx_tstamp);
+
+ memset(&hwtstamps, 0, sizeof(hwtstamps));
+ hwtstamps.hwtstamp = ns_to_ktime(nsec);
+ skb_tstamp_tx(pdata->tx_tstamp_skb, &hwtstamps);
+ }
+
+ dev_kfree_skb_any(pdata->tx_tstamp_skb);
+
+ spin_lock_irqsave(&pdata->tstamp_lock, flags);
+ pdata->tx_tstamp_skb = NULL;
+ spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
+
+ DBGPR("<--%s\n", __func__);
+}
+
+static int xgbe_get_hwtstamp_settings(struct xgbe_prv_data *pdata,
+ struct ifreq *ifreq)
+{
+ DBGPR("-->%s\n", __func__);
+
+ if (copy_to_user(ifreq->ifr_data, &pdata->tstamp_config,
+ sizeof(pdata->tstamp_config)))
+ return -EFAULT;
+
+ DBGPR("<--%s\n", __func__);
+
+ return 0;
+}
+
+static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata,
+ struct ifreq *ifreq)
+{
+ struct hwtstamp_config config;
+ unsigned int mac_tscr;
+
+ DBGPR("-->%s\n", __func__);
+
+ if (copy_from_user(&config, ifreq->ifr_data, sizeof(config)))
+ return -EFAULT;
+
+ if (config.flags)
+ return -EINVAL;
+
+ mac_tscr = 0;
+
+ switch (config.tx_type) {
+ case HWTSTAMP_TX_OFF:
+ break;
+
+ case HWTSTAMP_TX_ON:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ default:
+ return -ERANGE;
+ }
+
+ switch (config.rx_filter) {
+ case HWTSTAMP_FILTER_NONE:
+ break;
+
+ case HWTSTAMP_FILTER_ALL:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* PTP v2, UDP, any kind of event packet */
+ case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
+ /* PTP v1, UDP, any kind of event packet */
+ case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* PTP v2, UDP, Sync packet */
+ case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
+ /* PTP v1, UDP, Sync packet */
+ case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* PTP v2, UDP, Delay_req packet */
+ case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
+ /* PTP v1, UDP, Delay_req packet */
+ case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* 802.AS1, Ethernet, any kind of event packet */
+ case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* 802.AS1, Ethernet, Sync packet */
+ case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* 802.AS1, Ethernet, Delay_req packet */
+ case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* PTP v2/802.AS1, any layer, any kind of event packet */
+ case HWTSTAMP_FILTER_PTP_V2_EVENT:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* PTP v2/802.AS1, any layer, Sync packet */
+ case HWTSTAMP_FILTER_PTP_V2_SYNC:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ /* PTP v2/802.AS1, any layer, Delay_req packet */
+ case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
+ XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
+ break;
+
+ default:
+ return -ERANGE;
+ }
+
+ pdata->hw_if.config_tstamp(pdata, mac_tscr);
+
+ memcpy(&pdata->tstamp_config, &config, sizeof(config));
+
+ DBGPR("<--%s\n", __func__);
+
+ return 0;
+}
+
+static void xgbe_prep_tx_tstamp(struct xgbe_prv_data *pdata,
+ struct sk_buff *skb,
+ struct xgbe_packet_data *packet)
+{
+ unsigned long flags;
+
+ if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP)) {
+ spin_lock_irqsave(&pdata->tstamp_lock, flags);
+ if (pdata->tx_tstamp_skb) {
+ /* Another timestamp in progress, ignore this one */
+ XGMAC_SET_BITS(packet->attributes,
+ TX_PACKET_ATTRIBUTES, PTP, 0);
+ } else {
+ pdata->tx_tstamp_skb = skb_get(skb);
+ skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+ }
+ spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
+ }
+
+ if (!XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP))
+ skb_tx_timestamp(skb);
+}
+
static void xgbe_prep_vlan(struct sk_buff *skb, struct xgbe_packet_data *packet)
{
if (vlan_tx_tag_present(skb))
@@ -711,7 +926,8 @@ static int xgbe_is_tso(struct sk_buff *skb)
return 1;
}
-static void xgbe_packet_info(struct xgbe_ring *ring, struct sk_buff *skb,
+static void xgbe_packet_info(struct xgbe_prv_data *pdata,
+ struct xgbe_ring *ring, struct sk_buff *skb,
struct xgbe_packet_data *packet)
{
struct skb_frag_struct *frag;
@@ -753,6 +969,11 @@ static void xgbe_packet_info(struct xgbe_ring *ring, struct sk_buff *skb,
VLAN_CTAG, 1);
}
+ if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
+ (pdata->tstamp_config.tx_type == HWTSTAMP_TX_ON))
+ XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
+ PTP, 1);
+
for (len = skb_headlen(skb); len;) {
packet->rdesc_count++;
len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
@@ -776,26 +997,33 @@ static int xgbe_open(struct net_device *netdev)
DBGPR("-->xgbe_open\n");
- /* Enable the clock */
- ret = clk_prepare_enable(pdata->sysclock);
+ /* Enable the clocks */
+ ret = clk_prepare_enable(pdata->sysclk);
if (ret) {
- netdev_alert(netdev, "clk_prepare_enable failed\n");
+ netdev_alert(netdev, "dma clk_prepare_enable failed\n");
return ret;
}
+ ret = clk_prepare_enable(pdata->ptpclk);
+ if (ret) {
+ netdev_alert(netdev, "ptp clk_prepare_enable failed\n");
+ goto err_sysclk;
+ }
+
/* Calculate the Rx buffer size before allocating rings */
ret = xgbe_calc_rx_buf_size(netdev, netdev->mtu);
if (ret < 0)
- goto err_clk;
+ goto err_ptpclk;
pdata->rx_buf_size = ret;
/* Allocate the ring descriptors and buffers */
ret = desc_if->alloc_ring_resources(pdata);
if (ret)
- goto err_clk;
+ goto err_ptpclk;
- /* Initialize the device restart work struct */
+ /* Initialize the device restart and Tx timestamp work struct */
INIT_WORK(&pdata->restart_work, xgbe_restart);
+ INIT_WORK(&pdata->tx_tstamp_work, xgbe_tx_tstamp);
/* Request interrupts */
ret = devm_request_irq(pdata->dev, netdev->irq, xgbe_isr, 0,
@@ -824,8 +1052,11 @@ err_start:
err_irq:
desc_if->free_ring_resources(pdata);
-err_clk:
- clk_disable_unprepare(pdata->sysclock);
+err_ptpclk:
+ clk_disable_unprepare(pdata->ptpclk);
+
+err_sysclk:
+ clk_disable_unprepare(pdata->sysclk);
return ret;
}
@@ -853,8 +1084,9 @@ static int xgbe_close(struct net_device *netdev)
pdata->irq_number = 0;
}
- /* Disable the clock */
- clk_disable_unprepare(pdata->sysclock);
+ /* Disable the clocks */
+ clk_disable_unprepare(pdata->ptpclk);
+ clk_disable_unprepare(pdata->sysclk);
DBGPR("<--xgbe_close\n");
@@ -890,7 +1122,7 @@ static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
/* Calculate preliminary packet info */
memset(packet, 0, sizeof(*packet));
- xgbe_packet_info(ring, skb, packet);
+ xgbe_packet_info(pdata, ring, skb, packet);
/* Check that there are enough descriptors available */
if (packet->rdesc_count > xgbe_tx_avail_desc(ring)) {
@@ -914,6 +1146,8 @@ static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
goto tx_netdev_return;
}
+ xgbe_prep_tx_tstamp(pdata, skb, packet);
+
/* Configure required descriptor fields for transmission */
hw_if->pre_xmit(channel);
@@ -968,6 +1202,31 @@ static int xgbe_set_mac_address(struct net_device *netdev, void *addr)
return 0;
}
+static int xgbe_ioctl(struct net_device *netdev, struct ifreq *ifreq, int cmd)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+ int ret;
+
+ DBGPR("-->%s\n", __func__);
+
+ switch (cmd) {
+ case SIOCGHWTSTAMP:
+ ret = xgbe_get_hwtstamp_settings(pdata, ifreq);
+ break;
+
+ case SIOCSHWTSTAMP:
+ ret = xgbe_set_hwtstamp_settings(pdata, ifreq);
+ break;
+
+ default:
+ ret = -EOPNOTSUPP;
+ }
+
+ DBGPR("<--%s\n", __func__);
+
+ return ret;
+}
+
static int xgbe_change_mtu(struct net_device *netdev, int mtu)
{
struct xgbe_prv_data *pdata = netdev_priv(netdev);
@@ -1109,6 +1368,7 @@ static const struct net_device_ops xgbe_netdev_ops = {
.ndo_set_rx_mode = xgbe_set_rx_mode,
.ndo_set_mac_address = xgbe_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = xgbe_ioctl,
.ndo_change_mtu = xgbe_change_mtu,
.ndo_get_stats64 = xgbe_get_stats64,
.ndo_vlan_rx_add_vid = xgbe_vlan_rx_add_vid,
@@ -1202,8 +1462,9 @@ static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
struct xgbe_packet_data *packet;
struct net_device *netdev = pdata->netdev;
struct sk_buff *skb;
- unsigned int incomplete, error;
- unsigned int cur_len, put_len, max_len;
+ struct skb_shared_hwtstamps *hwtstamps;
+ unsigned int incomplete, error, context_next, context;
+ unsigned int len, put_len, max_len;
int received = 0;
DBGPR("-->xgbe_rx_poll: budget=%d\n", budget);
@@ -1212,22 +1473,33 @@ static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
if (!ring)
return 0;
+ rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
packet = &ring->packet_data;
while (received < budget) {
DBGPR(" cur = %d\n", ring->cur);
- /* Clear the packet data information */
- memset(packet, 0, sizeof(*packet));
- skb = NULL;
- error = 0;
- cur_len = 0;
+ /* First time in loop see if we need to restore state */
+ if (!received && rdata->state_saved) {
+ incomplete = rdata->state.incomplete;
+ context_next = rdata->state.context_next;
+ skb = rdata->state.skb;
+ error = rdata->state.error;
+ len = rdata->state.len;
+ } else {
+ memset(packet, 0, sizeof(*packet));
+ incomplete = 0;
+ context_next = 0;
+ skb = NULL;
+ error = 0;
+ len = 0;
+ }
read_again:
+ rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
+
if (ring->dirty > (XGBE_RX_DESC_CNT >> 3))
xgbe_rx_refresh(channel);
- rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
-
if (hw_if->dev_read(channel))
break;
@@ -1242,9 +1514,15 @@ read_again:
incomplete = XGMAC_GET_BITS(packet->attributes,
RX_PACKET_ATTRIBUTES,
INCOMPLETE);
+ context_next = XGMAC_GET_BITS(packet->attributes,
+ RX_PACKET_ATTRIBUTES,
+ CONTEXT_NEXT);
+ context = XGMAC_GET_BITS(packet->attributes,
+ RX_PACKET_ATTRIBUTES,
+ CONTEXT);
/* Earlier error, just drain the remaining data */
- if (incomplete && error)
+ if ((incomplete || context_next) && error)
goto read_again;
if (error || packet->errors) {
@@ -1254,30 +1532,37 @@ read_again:
continue;
}
- put_len = rdata->len - cur_len;
- if (skb) {
- if (pskb_expand_head(skb, 0, put_len, GFP_ATOMIC)) {
- DBGPR("pskb_expand_head error\n");
- if (incomplete) {
- error = 1;
- goto read_again;
+ if (!context) {
+ put_len = rdata->len - len;
+ if (skb) {
+ if (pskb_expand_head(skb, 0, put_len,
+ GFP_ATOMIC)) {
+ DBGPR("pskb_expand_head error\n");
+ if (incomplete) {
+ error = 1;
+ goto read_again;
+ }
+
+ dev_kfree_skb(skb);
+ continue;
}
-
- dev_kfree_skb(skb);
- continue;
+ memcpy(skb_tail_pointer(skb), rdata->skb->data,
+ put_len);
+ } else {
+ skb = rdata->skb;
+ rdata->skb = NULL;
}
- memcpy(skb_tail_pointer(skb), rdata->skb->data,
- put_len);
- } else {
- skb = rdata->skb;
- rdata->skb = NULL;
+ skb_put(skb, put_len);
+ len += put_len;
}
- skb_put(skb, put_len);
- cur_len += put_len;
- if (incomplete)
+ if (incomplete || context_next)
goto read_again;
+ /* Stray Context Descriptor? */
+ if (!skb)
+ continue;
+
/* Be sure we don't exceed the configured MTU */
max_len = netdev->mtu + ETH_HLEN;
if (!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
@@ -1304,6 +1589,16 @@ read_again:
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
packet->vlan_ctag);
+ if (XGMAC_GET_BITS(packet->attributes,
+ RX_PACKET_ATTRIBUTES, RX_TSTAMP)) {
+ u64 nsec;
+
+ nsec = timecounter_cyc2time(&pdata->tstamp_tc,
+ packet->rx_tstamp);
+ hwtstamps = skb_hwtstamps(skb);
+ hwtstamps->hwtstamp = ns_to_ktime(nsec);
+ }
+
skb->dev = netdev;
skb->protocol = eth_type_trans(skb, netdev);
skb_record_rx_queue(skb, channel->queue_index);
@@ -1313,6 +1608,17 @@ read_again:
napi_gro_receive(&pdata->napi, skb);
}
+ /* Check if we need to save state before leaving */
+ if (received && (incomplete || context_next)) {
+ rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
+ rdata->state_saved = 1;
+ rdata->state.incomplete = incomplete;
+ rdata->state.context_next = context_next;
+ rdata->state.skb = skb;
+ rdata->state.len = len;
+ rdata->state.error = error;
+ }
+
DBGPR("<--xgbe_rx_poll: received = %d\n", received);
return received;
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
index f740526..9a48668 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c
@@ -116,6 +116,7 @@
#include <linux/spinlock.h>
#include <linux/phy.h>
+#include <linux/net_tstamp.h>
#include "xgbe.h"
#include "xgbe-common.h"
@@ -480,6 +481,43 @@ static int xgbe_set_coalesce(struct net_device *netdev,
return 0;
}
+static int xgbe_get_ts_info(struct net_device *netdev,
+ struct ethtool_ts_info *ts_info)
+{
+ struct xgbe_prv_data *pdata = netdev_priv(netdev);
+
+ DBGPR("-->%s\n", __func__);
+
+ ts_info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
+ SOF_TIMESTAMPING_RX_SOFTWARE |
+ SOF_TIMESTAMPING_SOFTWARE |
+ SOF_TIMESTAMPING_TX_HARDWARE |
+ SOF_TIMESTAMPING_RX_HARDWARE |
+ SOF_TIMESTAMPING_RAW_HARDWARE;
+
+ if (pdata->ptp_clock)
+ ts_info->phc_index = ptp_clock_index(pdata->ptp_clock);
+ else
+ ts_info->phc_index = -1;
+
+ ts_info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON);
+ ts_info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
+ (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
+ (1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC) |
+ (1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ) |
+ (1 << HWTSTAMP_FILTER_ALL);
+
+ DBGPR("<--%s\n", __func__);
+
+ return 0;
+}
+
static const struct ethtool_ops xgbe_ethtool_ops = {
.get_settings = xgbe_get_settings,
.set_settings = xgbe_set_settings,
@@ -492,6 +530,7 @@ static const struct ethtool_ops xgbe_ethtool_ops = {
.get_strings = xgbe_get_strings,
.get_ethtool_stats = xgbe_get_ethtool_stats,
.get_sset_count = xgbe_get_sset_count,
+ .get_ts_info = xgbe_get_ts_info,
};
struct ethtool_ops *xgbe_get_ethtool_ops(void)
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
index e56c3d4..ca6a6af 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c
@@ -245,6 +245,7 @@ static int xgbe_probe(struct platform_device *pdev)
spin_lock_init(&pdata->lock);
mutex_init(&pdata->xpcs_mutex);
+ spin_lock_init(&pdata->tstamp_lock);
/* Set and validate the number of descriptors for a ring */
BUILD_BUG_ON_NOT_POWER_OF_2(XGBE_TX_DESC_CNT);
@@ -265,10 +266,18 @@ static int xgbe_probe(struct platform_device *pdev)
}
/* Obtain the system clock setting */
- pdata->sysclock = devm_clk_get(dev, NULL);
- if (IS_ERR(pdata->sysclock)) {
- dev_err(dev, "devm_clk_get failed\n");
- ret = PTR_ERR(pdata->sysclock);
+ pdata->sysclk = devm_clk_get(dev, XGBE_DMA_CLOCK);
+ if (IS_ERR(pdata->sysclk)) {
+ dev_err(dev, "dma devm_clk_get failed\n");
+ ret = PTR_ERR(pdata->sysclk);
+ goto err_io;
+ }
+
+ /* Obtain the PTP clock setting */
+ pdata->ptpclk = devm_clk_get(dev, XGBE_PTP_CLOCK);
+ if (IS_ERR(pdata->ptpclk)) {
+ dev_err(dev, "ptp devm_clk_get failed\n");
+ ret = PTR_ERR(pdata->ptpclk);
goto err_io;
}
@@ -420,6 +429,8 @@ static int xgbe_probe(struct platform_device *pdev)
goto err_reg_netdev;
}
+ xgbe_ptp_register(pdata);
+
xgbe_debugfs_init(pdata);
netdev_notice(netdev, "net device enabled\n");
@@ -452,6 +463,8 @@ static int xgbe_remove(struct platform_device *pdev)
xgbe_debugfs_exit(pdata);
+ xgbe_ptp_unregister(pdata);
+
unregister_netdev(netdev);
xgbe_mdio_unregister(pdata);
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c b/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
new file mode 100644
index 0000000..54b30ab
--- /dev/null
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-ptp.c
@@ -0,0 +1,313 @@
+/*
+ * AMD 10Gb Ethernet driver
+ *
+ * This file is available to you under your choice of the following two
+ * licenses:
+ *
+ * License 1: GPLv2
+ *
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ *
+ * This file is free software; you may copy, redistribute and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ * The Synopsys DWC ETHER XGMAC Software Driver and documentation
+ * (hereinafter "Software") is an unsupported proprietary work of Synopsys,
+ * Inc. unless otherwise expressly agreed to in writing between Synopsys
+ * and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for Licensed
+ * Product with Synopsys or any supplement thereto. Permission is hereby
+ * granted, free of charge, to any person obtaining a copy of this software
+ * annotated with this license and the Software, to deal in the Software
+ * without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * License 2: Modified BSD
+ *
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of Advanced Micro Devices, Inc. nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ * The Synopsys DWC ETHER XGMAC Software Driver and documentation
+ * (hereinafter "Software") is an unsupported proprietary work of Synopsys,
+ * Inc. unless otherwise expressly agreed to in writing between Synopsys
+ * and you.
+ *
+ * The Software IS NOT an item of Licensed Software or Licensed Product
+ * under any End User Software License Agreement or Agreement for Licensed
+ * Product with Synopsys or any supplement thereto. Permission is hereby
+ * granted, free of charge, to any person obtaining a copy of this software
+ * annotated with this license and the Software, to deal in the Software
+ * without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished
+ * to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/net_tstamp.h>
+
+#include "xgbe.h"
+#include "xgbe-common.h"
+
+
+static cycle_t xgbe_cc_read(const struct cyclecounter *cc)
+{
+ struct xgbe_prv_data *pdata = container_of(cc,
+ struct xgbe_prv_data,
+ tstamp_cc);
+ u64 nsec;
+
+ DBGPR("-->%s\n", __func__);
+
+ nsec = pdata->hw_if.get_tstamp_time(pdata);
+
+ DBGPR("<--%s\n", __func__);
+
+ return nsec;
+}
+
+static int xgbe_adjfreq(struct ptp_clock_info *info, s32 delta)
+{
+ struct xgbe_prv_data *pdata = container_of(info,
+ struct xgbe_prv_data,
+ ptp_clock_info);
+ unsigned long flags;
+ u64 adjust;
+ u32 addend, diff;
+ unsigned int neg_adjust = 0;
+
+ DBGPR("-->%s\n", __func__);
+
+ if (delta < 0) {
+ neg_adjust = 1;
+ delta = -delta;
+ }
+
+ adjust = pdata->tstamp_addend;
+ adjust *= delta;
+ diff = div_u64(adjust, 1000000000UL);
+
+ addend = (neg_adjust) ? pdata->tstamp_addend - diff :
+ pdata->tstamp_addend + diff;
+
+ spin_lock_irqsave(&pdata->tstamp_lock, flags);
+
+ pdata->hw_if.update_tstamp_addend(pdata, addend);
+
+ spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
+
+ DBGPR("<--%s\n", __func__);
+
+ return 0;
+}
+
+static int xgbe_adjtime(struct ptp_clock_info *info, s64 delta)
+{
+ struct xgbe_prv_data *pdata = container_of(info,
+ struct xgbe_prv_data,
+ ptp_clock_info);
+ unsigned long flags;
+ u64 nsec;
+
+ DBGPR("-->%s\n", __func__);
+
+ spin_lock_irqsave(&pdata->tstamp_lock, flags);
+
+ nsec = timecounter_read(&pdata->tstamp_tc);
+
+ nsec += delta;
+ timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec);
+
+ spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
+
+ DBGPR("<--%s\n", __func__);
+
+ return 0;
+}
+
+static int xgbe_gettime(struct ptp_clock_info *info, struct timespec *ts)
+{
+ struct xgbe_prv_data *pdata = container_of(info,
+ struct xgbe_prv_data,
+ ptp_clock_info);
+ unsigned long flags;
+ u64 nsec;
+
+ DBGPR("-->%s\n", __func__);
+
+ spin_lock_irqsave(&pdata->tstamp_lock, flags);
+
+ nsec = timecounter_read(&pdata->tstamp_tc);
+
+ spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
+
+ *ts = ns_to_timespec(nsec);
+
+ DBGPR("<--%s\n", __func__);
+
+ return 0;
+}
+
+static int xgbe_settime(struct ptp_clock_info *info, const struct timespec *ts)
+{
+ struct xgbe_prv_data *pdata = container_of(info,
+ struct xgbe_prv_data,
+ ptp_clock_info);
+ unsigned long flags;
+ u64 nsec;
+
+ DBGPR("-->%s\n", __func__);
+
+ nsec = timespec_to_ns(ts);
+
+ spin_lock_irqsave(&pdata->tstamp_lock, flags);
+
+ timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec);
+
+ spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
+
+ DBGPR("<--%s\n", __func__);
+
+ return 0;
+}
+
+static int xgbe_enable(struct ptp_clock_info *info,
+ struct ptp_clock_request *request, int on)
+{
+ return -EOPNOTSUPP;
+}
+
+void xgbe_ptp_register(struct xgbe_prv_data *pdata)
+{
+ struct ptp_clock_info *info = &pdata->ptp_clock_info;
+ struct ptp_clock *clock;
+ struct cyclecounter *cc = &pdata->tstamp_cc;
+ u64 dividend;
+
+ DBGPR("-->%s\n", __func__);
+
+ snprintf(info->name, sizeof(info->name), "%s",
+ netdev_name(pdata->netdev));
+ info->owner = THIS_MODULE;
+ info->max_adj = clk_get_rate(pdata->ptpclk);
+ info->adjfreq = xgbe_adjfreq;
+ info->adjtime = xgbe_adjtime;
+ info->gettime = xgbe_gettime;
+ info->settime = xgbe_settime;
+ info->enable = xgbe_enable;
+
+ clock = ptp_clock_register(info, pdata->dev);
+ if (IS_ERR(clock)) {
+ dev_err(pdata->dev, "ptp_clock_register failed\n");
+ return;
+ }
+
+ pdata->ptp_clock = clock;
+
+ /* Calculate the addend:
+ * addend = 2^32 / (PTP ref clock / 50Mhz)
+ * = (2^32 * 50Mhz) / PTP ref clock
+ */
+ dividend = 50000000;
+ dividend <<= 32;
+ pdata->tstamp_addend = div_u64(dividend, clk_get_rate(pdata->ptpclk));
+
+ /* Setup the timecounter */
+ cc->read = xgbe_cc_read;
+ cc->mask = CLOCKSOURCE_MASK(64);
+ cc->mult = 1;
+ cc->shift = 0;
+
+ timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc,
+ ktime_to_ns(ktime_get_real()));
+
+ /* Disable all timestamping to start */
+ XGMAC_IOWRITE(pdata, MAC_TCR, 0);
+ pdata->tstamp_config.tx_type = HWTSTAMP_TX_OFF;
+ pdata->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
+
+ DBGPR("<--%s\n", __func__);
+}
+
+void xgbe_ptp_unregister(struct xgbe_prv_data *pdata)
+{
+ DBGPR("-->%s\n", __func__);
+
+ if (pdata->ptp_clock)
+ ptp_clock_unregister(pdata->ptp_clock);
+
+ DBGPR("<--%s\n", __func__);
+}
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 @@ struct xgbe_packet_data {
unsigned short mss;
unsigned short vlan_ctag;
+
+ u64 rx_tstamp;
};
/* Common Rx and Tx descriptor mapping */
@@ -242,6 +257,20 @@ struct xgbe_ring_data {
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 @@ struct xgbe_hw_if {
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 @@ struct xgbe_prv_data {
/* 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 @@ struct ethtool_ops *xgbe_get_ethtool_ops(void);
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 *,
--
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