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bnx2x: Fix remote fault handling
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Fix couple of issues of remote fault detection and handling:
Link may go down due to remote fault indications during link establishment.
Possible link down after primary function migration.
Remote fault was not detected on 578xx.

Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Yaniv Rosner authored and David S. Miller committed Aug 3, 2011
1 parent b507766 commit de6f337
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Showing 3 changed files with 69 additions and 45 deletions.
2 changes: 2 additions & 0 deletions drivers/net/bnx2x/bnx2x_hsi.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1204,6 +1204,8 @@ struct drv_port_mb {

#define LINK_STATUS_PFC_ENABLED 0x20000000

#define LINK_STATUS_PHYSICAL_LINK_FLAG 0x40000000

u32 port_stx;

u32 stat_nig_timer;
Expand Down
110 changes: 66 additions & 44 deletions drivers/net/bnx2x/bnx2x_link.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1745,6 +1745,10 @@ static int bnx2x_emac_enable(struct link_params *params,

DP(NETIF_MSG_LINK, "enabling EMAC\n");

/* Disable BMAC */
REG_WR(bp, GRCBASE_MISC + MISC_REGISTERS_RESET_REG_2_CLEAR,
(MISC_REGISTERS_RESET_REG_2_RST_BMAC0 << port));

/* enable emac and not bmac */
REG_WR(bp, NIG_REG_EGRESS_EMAC0_PORT + port*4, 1);

Expand Down Expand Up @@ -2599,12 +2603,6 @@ static int bnx2x_bmac1_enable(struct link_params *params,
REG_WR_DMAE(bp, bmac_addr + BIGMAC_REGISTER_RX_LLFC_MSG_FLDS,
wb_data, 2);

if (vars->phy_flags & PHY_TX_ERROR_CHECK_FLAG) {
REG_RD_DMAE(bp, bmac_addr + BIGMAC_REGISTER_RX_LSS_STATUS,
wb_data, 2);
if (wb_data[0] > 0)
return -ESRCH;
}
return 0;
}

Expand Down Expand Up @@ -2670,16 +2668,6 @@ static int bnx2x_bmac2_enable(struct link_params *params,
udelay(30);
bnx2x_update_pfc_bmac2(params, vars, is_lb);

if (vars->phy_flags & PHY_TX_ERROR_CHECK_FLAG) {
REG_RD_DMAE(bp, bmac_addr + BIGMAC2_REGISTER_RX_LSS_STAT,
wb_data, 2);
if (wb_data[0] > 0) {
DP(NETIF_MSG_LINK, "Got bad LSS status 0x%x\n",
wb_data[0]);
return -ESRCH;
}
}

return 0;
}

Expand Down Expand Up @@ -4369,6 +4357,9 @@ void bnx2x_link_status_update(struct link_params *params,

vars->link_up = (vars->link_status & LINK_STATUS_LINK_UP);
vars->phy_flags = PHY_XGXS_FLAG;
if (vars->link_status & LINK_STATUS_PHYSICAL_LINK_FLAG)
vars->phy_flags |= PHY_PHYSICAL_LINK_FLAG;

if (vars->link_up) {
DP(NETIF_MSG_LINK, "phy link up\n");

Expand Down Expand Up @@ -4460,6 +4451,8 @@ void bnx2x_link_status_update(struct link_params *params,

/* indicate no mac active */
vars->mac_type = MAC_TYPE_NONE;
if (vars->link_status & LINK_STATUS_PHYSICAL_LINK_FLAG)
vars->phy_flags |= PHY_HALF_OPEN_CONN_FLAG;
}

/* Sync media type */
Expand Down Expand Up @@ -6176,6 +6169,7 @@ static int bnx2x_update_link_down(struct link_params *params,
/* update shared memory */
vars->link_status &= ~(LINK_STATUS_SPEED_AND_DUPLEX_MASK |
LINK_STATUS_LINK_UP |
LINK_STATUS_PHYSICAL_LINK_FLAG |
LINK_STATUS_AUTO_NEGOTIATE_COMPLETE |
LINK_STATUS_RX_FLOW_CONTROL_FLAG_MASK |
LINK_STATUS_TX_FLOW_CONTROL_FLAG_MASK |
Expand Down Expand Up @@ -6213,7 +6207,8 @@ static int bnx2x_update_link_up(struct link_params *params,
u8 port = params->port;
int rc = 0;

vars->link_status |= LINK_STATUS_LINK_UP;
vars->link_status |= (LINK_STATUS_LINK_UP |
LINK_STATUS_PHYSICAL_LINK_FLAG);
vars->phy_flags |= PHY_PHYSICAL_LINK_FLAG;

if (vars->flow_ctrl & BNX2X_FLOW_CTRL_TX)
Expand Down Expand Up @@ -8132,7 +8127,6 @@ void bnx2x_handle_module_detect_int(struct link_params *params)
offsetof(struct shmem_region, dev_info.
port_feature_config[params->port].
config));

bnx2x_set_gpio_int(bp, gpio_num,
MISC_REGISTERS_GPIO_INT_OUTPUT_SET,
gpio_port);
Expand All @@ -8141,8 +8135,9 @@ void bnx2x_handle_module_detect_int(struct link_params *params)
* Disable transmit for this module
*/
phy->media_type = ETH_PHY_NOT_PRESENT;
if ((val & PORT_FEAT_CFG_OPT_MDL_ENFRCMNT_MASK) ==
PORT_FEAT_CFG_OPT_MDL_ENFRCMNT_DISABLE_TX_LASER)
if (((val & PORT_FEAT_CFG_OPT_MDL_ENFRCMNT_MASK) ==
PORT_FEAT_CFG_OPT_MDL_ENFRCMNT_DISABLE_TX_LASER) ||
CHIP_IS_E3(bp))
bnx2x_sfp_set_transmitter(params, phy, 0);
}
}
Expand Down Expand Up @@ -8244,9 +8239,6 @@ static u8 bnx2x_8706_config_init(struct bnx2x_phy *phy,
u16 cnt, val, tmp1;
struct bnx2x *bp = params->bp;

/* SPF+ PHY: Set flag to check for Tx error */
vars->phy_flags = PHY_TX_ERROR_CHECK_FLAG;

bnx2x_set_gpio(bp, MISC_REGISTERS_GPIO_2,
MISC_REGISTERS_GPIO_OUTPUT_HIGH, params->port);
/* HW reset */
Expand Down Expand Up @@ -8430,9 +8422,6 @@ static int bnx2x_8726_config_init(struct bnx2x_phy *phy,
struct bnx2x *bp = params->bp;
DP(NETIF_MSG_LINK, "Initializing BCM8726\n");

/* SPF+ PHY: Set flag to check for Tx error */
vars->phy_flags = PHY_TX_ERROR_CHECK_FLAG;

bnx2x_cl45_write(bp, phy, MDIO_PMA_DEVAD, MDIO_PMA_REG_CTRL, 1<<15);
bnx2x_wait_reset_complete(bp, phy, params);

Expand Down Expand Up @@ -8601,9 +8590,6 @@ static int bnx2x_8727_config_init(struct bnx2x_phy *phy,
struct bnx2x *bp = params->bp;
/* Enable PMD link, MOD_ABS_FLT, and 1G link alarm */

/* SPF+ PHY: Set flag to check for Tx error */
vars->phy_flags = PHY_TX_ERROR_CHECK_FLAG;

bnx2x_wait_reset_complete(bp, phy, params);
rx_alarm_ctrl_val = (1<<2) | (1<<5) ;
/* Should be 0x6 to enable XS on Tx side. */
Expand Down Expand Up @@ -10619,7 +10605,8 @@ static struct bnx2x_phy phy_warpcore = {
.type = PORT_HW_CFG_XGXS_EXT_PHY_TYPE_DIRECT,
.addr = 0xff,
.def_md_devad = 0,
.flags = FLAGS_HW_LOCK_REQUIRED,
.flags = (FLAGS_HW_LOCK_REQUIRED |
FLAGS_TX_ERROR_CHECK),
.rx_preemphasis = {0xffff, 0xffff, 0xffff, 0xffff},
.tx_preemphasis = {0xffff, 0xffff, 0xffff, 0xffff},
.mdio_ctrl = 0,
Expand Down Expand Up @@ -10745,7 +10732,8 @@ static struct bnx2x_phy phy_8706 = {
.type = PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8706,
.addr = 0xff,
.def_md_devad = 0,
.flags = FLAGS_INIT_XGXS_FIRST,
.flags = (FLAGS_INIT_XGXS_FIRST |
FLAGS_TX_ERROR_CHECK),
.rx_preemphasis = {0xffff, 0xffff, 0xffff, 0xffff},
.tx_preemphasis = {0xffff, 0xffff, 0xffff, 0xffff},
.mdio_ctrl = 0,
Expand Down Expand Up @@ -10776,7 +10764,8 @@ static struct bnx2x_phy phy_8726 = {
.addr = 0xff,
.def_md_devad = 0,
.flags = (FLAGS_HW_LOCK_REQUIRED |
FLAGS_INIT_XGXS_FIRST),
FLAGS_INIT_XGXS_FIRST |
FLAGS_TX_ERROR_CHECK),
.rx_preemphasis = {0xffff, 0xffff, 0xffff, 0xffff},
.tx_preemphasis = {0xffff, 0xffff, 0xffff, 0xffff},
.mdio_ctrl = 0,
Expand Down Expand Up @@ -10807,7 +10796,8 @@ static struct bnx2x_phy phy_8727 = {
.type = PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8727,
.addr = 0xff,
.def_md_devad = 0,
.flags = FLAGS_FAN_FAILURE_DET_REQ,
.flags = (FLAGS_FAN_FAILURE_DET_REQ |
FLAGS_TX_ERROR_CHECK),
.rx_preemphasis = {0xffff, 0xffff, 0xffff, 0xffff},
.tx_preemphasis = {0xffff, 0xffff, 0xffff, 0xffff},
.mdio_ctrl = 0,
Expand Down Expand Up @@ -12194,10 +12184,6 @@ static void bnx2x_analyze_link_error(struct link_params *params,
u8 led_mode;
u32 half_open_conn = (vars->phy_flags & PHY_HALF_OPEN_CONN_FLAG) > 0;

/*DP(NETIF_MSG_LINK, "CHECK LINK: %x half_open:%x-> lss:%x\n",
vars->link_up,
half_open_conn, lss_status);*/

if ((lss_status ^ half_open_conn) == 0)
return;

Expand All @@ -12210,6 +12196,7 @@ static void bnx2x_analyze_link_error(struct link_params *params,
* b. Update link_vars->link_up
*/
if (lss_status) {
DP(NETIF_MSG_LINK, "Remote Fault detected !!!\n");
vars->link_status &= ~LINK_STATUS_LINK_UP;
vars->link_up = 0;
vars->phy_flags |= PHY_HALF_OPEN_CONN_FLAG;
Expand All @@ -12219,6 +12206,7 @@ static void bnx2x_analyze_link_error(struct link_params *params,
*/
led_mode = LED_MODE_OFF;
} else {
DP(NETIF_MSG_LINK, "Remote Fault cleared\n");
vars->link_status |= LINK_STATUS_LINK_UP;
vars->link_up = 1;
vars->phy_flags &= ~PHY_HALF_OPEN_CONN_FLAG;
Expand All @@ -12235,6 +12223,15 @@ static void bnx2x_analyze_link_error(struct link_params *params,
bnx2x_notify_link_changed(bp);
}

/******************************************************************************
* Description:
* This function checks for half opened connection change indication.
* When such change occurs, it calls the bnx2x_analyze_link_error
* to check if Remote Fault is set or cleared. Reception of remote fault
* status message in the MAC indicates that the peer's MAC has detected
* a fault, for example, due to break in the TX side of fiber.
*
******************************************************************************/
static void bnx2x_check_half_open_conn(struct link_params *params,
struct link_vars *vars)
{
Expand All @@ -12245,9 +12242,28 @@ static void bnx2x_check_half_open_conn(struct link_params *params,
if ((vars->phy_flags & PHY_PHYSICAL_LINK_FLAG) == 0)
return;

if (!CHIP_IS_E3(bp) &&
if (CHIP_IS_E3(bp) &&
(REG_RD(bp, MISC_REG_RESET_REG_2) &
(MISC_REGISTERS_RESET_REG_2_RST_BMAC0 << params->port))) {
(MISC_REGISTERS_RESET_REG_2_XMAC))) {
/* Check E3 XMAC */
/*
* Note that link speed cannot be queried here, since it may be
* zero while link is down. In case UMAC is active, LSS will
* simply not be set
*/
mac_base = (params->port) ? GRCBASE_XMAC1 : GRCBASE_XMAC0;

/* Clear stick bits (Requires rising edge) */
REG_WR(bp, mac_base + XMAC_REG_CLEAR_RX_LSS_STATUS, 0);
REG_WR(bp, mac_base + XMAC_REG_CLEAR_RX_LSS_STATUS,
XMAC_CLEAR_RX_LSS_STATUS_REG_CLEAR_LOCAL_FAULT_STATUS |
XMAC_CLEAR_RX_LSS_STATUS_REG_CLEAR_REMOTE_FAULT_STATUS);
if (REG_RD(bp, mac_base + XMAC_REG_RX_LSS_STATUS))
lss_status = 1;

bnx2x_analyze_link_error(params, vars, lss_status);
} else if (REG_RD(bp, MISC_REG_RESET_REG_2) &
(MISC_REGISTERS_RESET_REG_2_RST_BMAC0 << params->port)) {
/* Check E1X / E2 BMAC */
u32 lss_status_reg;
u32 wb_data[2];
Expand All @@ -12269,14 +12285,20 @@ static void bnx2x_check_half_open_conn(struct link_params *params,
void bnx2x_period_func(struct link_params *params, struct link_vars *vars)
{
struct bnx2x *bp = params->bp;
u16 phy_idx;
if (!params) {
DP(NETIF_MSG_LINK, "Ininitliazed params !\n");
DP(NETIF_MSG_LINK, "Uninitialized params !\n");
return;
}
/* DP(NETIF_MSG_LINK, "Periodic called vars->phy_flags 0x%x speed 0x%x
RESET_REG_2 0x%x\n", vars->phy_flags, vars->line_speed,
REG_RD(bp, MISC_REG_RESET_REG_2)); */
bnx2x_check_half_open_conn(params, vars);

for (phy_idx = INT_PHY; phy_idx < MAX_PHYS; phy_idx++) {
if (params->phy[phy_idx].flags & FLAGS_TX_ERROR_CHECK) {
bnx2x_set_aer_mmd(params, &params->phy[phy_idx]);
bnx2x_check_half_open_conn(params, vars);
break;
}
}

if (CHIP_IS_E3(bp))
bnx2x_check_over_curr(params, vars);
}
Expand Down
2 changes: 1 addition & 1 deletion drivers/net/bnx2x/bnx2x_link.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -145,6 +145,7 @@ struct bnx2x_phy {
#define FLAGS_SFP_NOT_APPROVED (1<<7)
#define FLAGS_MDC_MDIO_WA (1<<8)
#define FLAGS_DUMMY_READ (1<<9)
#define FLAGS_TX_ERROR_CHECK (1<<12)

/* preemphasis values for the rx side */
u16 rx_preemphasis[4];
Expand Down Expand Up @@ -276,7 +277,6 @@ struct link_vars {
#define PHY_PHYSICAL_LINK_FLAG (1<<2)
#define PHY_HALF_OPEN_CONN_FLAG (1<<3)
#define PHY_OVER_CURRENT_FLAG (1<<4)
#define PHY_TX_ERROR_CHECK_FLAG (1<<5)

u8 mac_type;
#define MAC_TYPE_NONE 0
Expand Down

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