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tg3: PTP - Enable the timestamping feature in hardware and fill skb tx/rx timestamps 

This patch implements the hardware timestamping as described in
Documentation/networking/timestamping.txt

Update version to 3.128.

Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2012-12-03 19:37:00 +00:00 committed by David S. Miller
parent 0a633ac228
commit fb4ce8ad80
1 changed files with 52 additions and 5 deletions
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57
drivers/net/ethernet/broadcom/tg3.c
View File

@ -93,10 +93,10 @@ static inline void _tg3_flag_clear(enum TG3_FLAGS flag, unsigned long *bits)
#define DRV_MODULE_NAME "tg3"
#define TG3_MAJ_NUM 3
#define TG3_MIN_NUM 127
#define TG3_MIN_NUM 128
#define DRV_MODULE_VERSION \
__stringify(TG3_MAJ_NUM) "." __stringify(TG3_MIN_NUM)
#define DRV_MODULE_RELDATE "November 14, 2012"
#define DRV_MODULE_RELDATE "December 03, 2012"
#define RESET_KIND_SHUTDOWN 0
#define RESET_KIND_INIT 1
@ -5663,6 +5663,14 @@ static const struct ptp_clock_info tg3_ptp_caps = {
.enable = tg3_ptp_enable,
};
static void tg3_hwclock_to_timestamp(struct tg3 *tp, u64 hwclock,
struct skb_shared_hwtstamps *timestamp)
{
memset(timestamp, 0, sizeof(struct skb_shared_hwtstamps));
timestamp->hwtstamp = ns_to_ktime((hwclock & TG3_TSTAMP_MASK) +
tp->ptp_adjust);
}
/* tp->lock must be held */
static void tg3_ptp_init(struct tg3 *tp)
{
@ -5875,6 +5883,16 @@ static void tg3_tx(struct tg3_napi *tnapi)
return;
}
if (tnapi->tx_ring[sw_idx].len_flags & TXD_FLAG_HWTSTAMP) {
struct skb_shared_hwtstamps timestamp;
u64 hwclock = tr32(TG3_TX_TSTAMP_LSB);
hwclock |= (u64)tr32(TG3_TX_TSTAMP_MSB) << 32;
tg3_hwclock_to_timestamp(tp, hwclock, &timestamp);
skb_tstamp_tx(skb, &timestamp);
}
pci_unmap_single(tp->pdev,
dma_unmap_addr(ri, mapping),
skb_headlen(skb),
@ -6142,6 +6160,7 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
dma_addr_t dma_addr;
u32 opaque_key, desc_idx, *post_ptr;
u8 *data;
u64 tstamp = 0;
desc_idx = desc->opaque & RXD_OPAQUE_INDEX_MASK;
opaque_key = desc->opaque & RXD_OPAQUE_RING_MASK;
@ -6176,6 +6195,14 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
len = ((desc->idx_len & RXD_LEN_MASK) >> RXD_LEN_SHIFT) -
ETH_FCS_LEN;
if ((desc->type_flags & RXD_FLAG_PTPSTAT_MASK) ==
RXD_FLAG_PTPSTAT_PTPV1 ||
(desc->type_flags & RXD_FLAG_PTPSTAT_MASK) ==
RXD_FLAG_PTPSTAT_PTPV2) {
tstamp = tr32(TG3_RX_TSTAMP_LSB);
tstamp |= (u64)tr32(TG3_RX_TSTAMP_MSB) << 32;
}
if (len > TG3_RX_COPY_THRESH(tp)) {
int skb_size;
unsigned int frag_size;
@ -6219,6 +6246,10 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
}
skb_put(skb, len);
if (tstamp)
tg3_hwclock_to_timestamp(tp, tstamp,
skb_hwtstamps(skb));
if ((tp->dev->features & NETIF_F_RXCSUM) &&
(desc->type_flags & RXD_FLAG_TCPUDP_CSUM) &&
(((desc->ip_tcp_csum & RXD_TCPCSUM_MASK)
@ -7276,6 +7307,12 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
vlan = vlan_tx_tag_get(skb);
}
if ((unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) &&
tg3_flag(tp, TX_TSTAMP_EN)) {
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
base_flags |= TXD_FLAG_HWTSTAMP;
}
len = skb_headlen(skb);
mapping = pci_map_single(tp->pdev, skb->data, len, PCI_DMA_TODEVICE);
@ -9144,9 +9181,15 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
*/
tp->grc_mode |= GRC_MODE_NO_TX_PHDR_CSUM;
tw32(GRC_MODE,
tp->grc_mode |
(GRC_MODE_IRQ_ON_MAC_ATTN | GRC_MODE_HOST_STACKUP));
val = GRC_MODE_IRQ_ON_MAC_ATTN | GRC_MODE_HOST_STACKUP;
if (tp->rxptpctl)
tw32(TG3_RX_PTP_CTL,
tp->rxptpctl | TG3_RX_PTP_CTL_HWTS_INTERLOCK);
if (tg3_flag(tp, PTP_CAPABLE))
val |= GRC_MODE_TIME_SYNC_ENABLE;
tw32(GRC_MODE, tp->grc_mode | val);
/* Setup the timer prescalar register. Clock is always 66Mhz. */
val = tr32(GRC_MISC_CFG);
@ -16565,6 +16608,10 @@ static int tg3_init_one(struct pci_dev *pdev,
pci_set_drvdata(pdev, dev);
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719 ||
GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5720)
tg3_flag_set(tp, PTP_CAPABLE);
if (tg3_flag(tp, 5717_PLUS)) {
/* Resume a low-power mode */
tg3_frob_aux_power(tp, false);