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authorMichael Chan <mchan@broadcom.com>2006-09-28 02:59:15 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-09-29 05:01:34 +0400
commit3d3ebe741b2c06fe3df67739d09f6ef0e25ee41a (patch)
treef9112f5b5beac57673a26563a3a50517c5c96798
parent6ac59344ef25d5f0ebadb5663cf700d25d2a3886 (diff)
downloadlinux-3d3ebe741b2c06fe3df67739d09f6ef0e25ee41a.tar.xz
[TG3]: Improve 5704S autoneg.
Improve 5704S autoneg logic by using a serdes_counter field to keep track of the transient states. This eliminates a 200 msec busy loop in the code. Autoneg will take its course without the driver busy waiting for it to finish. Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/tg3.c66
-rw-r--r--drivers/net/tg3.h7
2 files changed, 47 insertions, 26 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index aaf45b907a78..4eef798fbb7b 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -2406,24 +2406,27 @@ static int tg3_setup_fiber_hw_autoneg(struct tg3 *tp, u32 mac_status)
expected_sg_dig_ctrl |= (1 << 12);
if (sg_dig_ctrl != expected_sg_dig_ctrl) {
+ if ((tp->tg3_flags2 & TG3_FLG2_PARALLEL_DETECT) &&
+ tp->serdes_counter &&
+ ((mac_status & (MAC_STATUS_PCS_SYNCED |
+ MAC_STATUS_RCVD_CFG)) ==
+ MAC_STATUS_PCS_SYNCED)) {
+ tp->serdes_counter--;
+ current_link_up = 1;
+ goto out;
+ }
+restart_autoneg:
if (workaround)
tw32_f(MAC_SERDES_CFG, serdes_cfg | 0xc011000);
tw32_f(SG_DIG_CTRL, expected_sg_dig_ctrl | (1 << 30));
udelay(5);
tw32_f(SG_DIG_CTRL, expected_sg_dig_ctrl);
- tp->tg3_flags2 |= TG3_FLG2_PHY_JUST_INITTED;
+ tp->serdes_counter = SERDES_AN_TIMEOUT_5704S;
+ tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
} else if (mac_status & (MAC_STATUS_PCS_SYNCED |
MAC_STATUS_SIGNAL_DET)) {
- int i;
-
- /* Giver time to negotiate (~200ms) */
- for (i = 0; i < 40000; i++) {
- sg_dig_status = tr32(SG_DIG_STATUS);
- if (sg_dig_status & (0x3))
- break;
- udelay(5);
- }
+ sg_dig_status = tr32(SG_DIG_STATUS);
mac_status = tr32(MAC_STATUS);
if ((sg_dig_status & (1 << 1)) &&
@@ -2439,10 +2442,11 @@ static int tg3_setup_fiber_hw_autoneg(struct tg3 *tp, u32 mac_status)
tg3_setup_flow_control(tp, local_adv, remote_adv);
current_link_up = 1;
- tp->tg3_flags2 &= ~TG3_FLG2_PHY_JUST_INITTED;
+ tp->serdes_counter = 0;
+ tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
} else if (!(sg_dig_status & (1 << 1))) {
- if (tp->tg3_flags2 & TG3_FLG2_PHY_JUST_INITTED)
- tp->tg3_flags2 &= ~TG3_FLG2_PHY_JUST_INITTED;
+ if (tp->serdes_counter)
+ tp->serdes_counter--;
else {
if (workaround) {
u32 val = serdes_cfg;
@@ -2466,9 +2470,17 @@ static int tg3_setup_fiber_hw_autoneg(struct tg3 *tp, u32 mac_status)
!(mac_status & MAC_STATUS_RCVD_CFG)) {
tg3_setup_flow_control(tp, 0, 0);
current_link_up = 1;
- }
+ tp->tg3_flags2 |=
+ TG3_FLG2_PARALLEL_DETECT;
+ tp->serdes_counter =
+ SERDES_PARALLEL_DET_TIMEOUT;
+ } else
+ goto restart_autoneg;
}
}
+ } else {
+ tp->serdes_counter = SERDES_AN_TIMEOUT_5704S;
+ tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
}
out:
@@ -2599,14 +2611,16 @@ static int tg3_setup_fiber_phy(struct tg3 *tp, int force_reset)
MAC_STATUS_CFG_CHANGED));
udelay(5);
if ((tr32(MAC_STATUS) & (MAC_STATUS_SYNC_CHANGED |
- MAC_STATUS_CFG_CHANGED)) == 0)
+ MAC_STATUS_CFG_CHANGED |
+ MAC_STATUS_LNKSTATE_CHANGED)) == 0)
break;
}
mac_status = tr32(MAC_STATUS);
if ((mac_status & MAC_STATUS_PCS_SYNCED) == 0) {
current_link_up = 0;
- if (tp->link_config.autoneg == AUTONEG_ENABLE) {
+ if (tp->link_config.autoneg == AUTONEG_ENABLE &&
+ tp->serdes_counter == 0) {
tw32_f(MAC_MODE, (tp->mac_mode |
MAC_MODE_SEND_CONFIGS));
udelay(1);
@@ -2711,7 +2725,7 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset)
tg3_writephy(tp, MII_BMCR, bmcr);
tw32_f(MAC_EVENT, MAC_EVENT_LNKSTATE_CHANGED);
- tp->tg3_flags2 |= TG3_FLG2_PHY_JUST_INITTED;
+ tp->serdes_counter = SERDES_AN_TIMEOUT_5714S;
tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
return err;
@@ -2816,9 +2830,9 @@ static int tg3_setup_fiber_mii_phy(struct tg3 *tp, int force_reset)
static void tg3_serdes_parallel_detect(struct tg3 *tp)
{
- if (tp->tg3_flags2 & TG3_FLG2_PHY_JUST_INITTED) {
+ if (tp->serdes_counter) {
/* Give autoneg time to complete. */
- tp->tg3_flags2 &= ~TG3_FLG2_PHY_JUST_INITTED;
+ tp->serdes_counter--;
return;
}
if (!netif_carrier_ok(tp->dev) &&
@@ -6660,12 +6674,14 @@ static void tg3_timer(unsigned long __opaque)
need_setup = 1;
}
if (need_setup) {
- tw32_f(MAC_MODE,
- (tp->mac_mode &
- ~MAC_MODE_PORT_MODE_MASK));
- udelay(40);
- tw32_f(MAC_MODE, tp->mac_mode);
- udelay(40);
+ if (!tp->serdes_counter) {
+ tw32_f(MAC_MODE,
+ (tp->mac_mode &
+ ~MAC_MODE_PORT_MODE_MASK));
+ udelay(40);
+ tw32_f(MAC_MODE, tp->mac_mode);
+ udelay(40);
+ }
tg3_setup_phy(tp, 0);
}
} else if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES)
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 3ecf356cfb08..f9c81baca8d8 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2203,7 +2203,6 @@ struct tg3 {
#define TG3_FLG2_PCI_EXPRESS 0x00000200
#define TG3_FLG2_ASF_NEW_HANDSHAKE 0x00000400
#define TG3_FLG2_HW_AUTONEG 0x00000800
-#define TG3_FLG2_PHY_JUST_INITTED 0x00001000
#define TG3_FLG2_PHY_SERDES 0x00002000
#define TG3_FLG2_CAPACITIVE_COUPLING 0x00004000
#define TG3_FLG2_FLASH 0x00008000
@@ -2236,6 +2235,12 @@ struct tg3 {
u16 asf_counter;
u16 asf_multiplier;
+ /* 1 second counter for transient serdes link events */
+ u32 serdes_counter;
+#define SERDES_AN_TIMEOUT_5704S 2
+#define SERDES_PARALLEL_DET_TIMEOUT 1
+#define SERDES_AN_TIMEOUT_5714S 1
+
struct tg3_link_config link_config;
struct tg3_bufmgr_config bufmgr_config;