/******************************************************************************* Copyright(c) 1999 - 2006 Intel Corporation. All rights reserved. This program is free software; you can redistribute it 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 program 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. The full GNU General Public License is included in this distribution in the file called LICENSE. Contact Information: Linux NICS e1000-devel Mailing List Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 *******************************************************************************/ #include "e1000.h" /* This is the only thing that needs to be changed to adjust the * maximum number of ports that the driver can manage. */ #define E1000_MAX_NIC 32 #define OPTION_UNSET -1 #define OPTION_DISABLED 0 #define OPTION_ENABLED 1 /* All parameters are treated the same, as an integer array of values. * This macro just reduces the need to repeat the same declaration code * over and over (plus this helps to avoid typo bugs). */ #define E1000_PARAM_INIT { [0 ... E1000_MAX_NIC] = OPTION_UNSET } #define E1000_PARAM(X, desc) \ static int __devinitdata X[E1000_MAX_NIC+1] = E1000_PARAM_INIT; \ static int num_##X = 0; \ module_param_array_named(X, X, int, &num_##X, 0); \ MODULE_PARM_DESC(X, desc); /* Transmit Descriptor Count * * Valid Range: 80-256 for 82542 and 82543 gigabit ethernet controllers * Valid Range: 80-4096 for 82544 and newer * * Default Value: 256 */ E1000_PARAM(TxDescriptors, "Number of transmit descriptors"); /* Receive Descriptor Count * * Valid Range: 80-256 for 82542 and 82543 gigabit ethernet controllers * Valid Range: 80-4096 for 82544 and newer * * Default Value: 256 */ E1000_PARAM(RxDescriptors, "Number of receive descriptors"); /* User Specified Speed Override * * Valid Range: 0, 10, 100, 1000 * - 0 - auto-negotiate at all supported speeds * - 10 - only link at 10 Mbps * - 100 - only link at 100 Mbps * - 1000 - only link at 1000 Mbps * * Default Value: 0 */ E1000_PARAM(Speed, "Speed setting"); /* User Specified Duplex Override * * Valid Range: 0-2 * - 0 - auto-negotiate for duplex * - 1 - only link at half duplex * - 2 - only link at full duplex * * Default Value: 0 */ E1000_PARAM(Duplex, "Duplex setting"); /* Auto-negotiation Advertisement Override * * Valid Range: 0x01-0x0F, 0x20-0x2F (copper); 0x20 (fiber) * * The AutoNeg value is a bit mask describing which speed and duplex * combinations should be advertised during auto-negotiation. * The supported speed and duplex modes are listed below * * Bit 7 6 5 4 3 2 1 0 * Speed (Mbps) N/A N/A 1000 N/A 100 100 10 10 * Duplex Full Full Half Full Half * * Default Value: 0x2F (copper); 0x20 (fiber) */ E1000_PARAM(AutoNeg, "Advertised auto-negotiation setting"); /* User Specified Flow Control Override * * Valid Range: 0-3 * - 0 - No Flow Control * - 1 - Rx only, respond to PAUSE frames but do not generate them * - 2 - Tx only, generate PAUSE frames but ignore them on receive * - 3 - Full Flow Control Support * * Default Value: Read flow control settings from the EEPROM */ E1000_PARAM(FlowControl, "Flow Control setting"); /* XsumRX - Receive Checksum Offload Enable/Disable * * Valid Range: 0, 1 * - 0 - disables all checksum offload * - 1 - enables receive IP/TCP/UDP checksum offload * on 82543 and newer -based NICs * * Default Value: 1 */ E1000_PARAM(XsumRX, "Disable or enable Receive Checksum offload"); /* Transmit Interrupt Delay in units of 1.024 microseconds * * Valid Range: 0-65535 * * Default Value: 64 */ E1000_PARAM(TxIntDelay, "Transmit Interrupt Delay"); /* Transmit Absolute Interrupt Delay in units of 1.024 microseconds * * Valid Range: 0-65535 * * Default Value: 0 */ E1000_PARAM(TxAbsIntDelay, "Transmit Absolute Interrupt Delay"); /* Receive Interrupt Delay in units of 1.024 microseconds * * Valid Range: 0-65535 * * Default Value: 0 */ E1000_PARAM(RxIntDelay, "Receive Interrupt Delay"); /* Receive Absolute Interrupt Delay in units of 1.024 microseconds * * Valid Range: 0-65535 * * Default Value: 128 */ E1000_PARAM(RxAbsIntDelay, "Receive Absolute Interrupt Delay"); /* Interrupt Throttle Rate (interrupts/sec) * * Valid Range: 100-100000 (0=off, 1=dynamic) * * Default Value: 8000 */ E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate"); /* Enable Smart Power Down of the PHY * * Valid Range: 0, 1 * * Default Value: 0 (disabled) */ E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down"); #define AUTONEG_ADV_DEFAULT 0x2F #define AUTONEG_ADV_MASK 0x2F #define FLOW_CONTROL_DEFAULT FLOW_CONTROL_FULL #define DEFAULT_RDTR 0 #define MAX_RXDELAY 0xFFFF #define MIN_RXDELAY 0 #define DEFAULT_RADV 128 #define MAX_RXABSDELAY 0xFFFF #define MIN_RXABSDELAY 0 #define DEFAULT_TIDV 64 #define MAX_TXDELAY 0xFFFF #define MIN_TXDELAY 0 #define DEFAULT_TADV 64 #define MAX_TXABSDELAY 0xFFFF #define MIN_TXABSDELAY 0 #define DEFAULT_ITR 8000 #define MAX_ITR 100000 #define MIN_ITR 100 struct e1000_option { enum { enable_option, range_option, list_option } type; char *name; char *err; int def; union { struct { /* range_option info */ int min; int max; } r; struct { /* list_option info */ int nr; struct e1000_opt_list { int i; char *str; } *p; } l; } arg; }; static int __devinit e1000_validate_option(int *value, struct e1000_option *opt, struct e1000_adapter *adapter) { if (*value == OPTION_UNSET) { *value = opt->def; return 0; } switch (opt->type) { case enable_option: switch (*value) { case OPTION_ENABLED: DPRINTK(PROBE, INFO, "%s Enabled\n", opt->name); return 0; case OPTION_DISABLED: DPRINTK(PROBE, INFO, "%s Disabled\n", opt->name); return 0; } break; case range_option: if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) { DPRINTK(PROBE, INFO, "%s set to %i\n", opt->name, *value); return 0; } break; case list_option: { int i; struct e1000_opt_list *ent; for (i = 0; i < opt->arg.l.nr; i++) { ent = &opt->arg.l.p[i]; if (*value == ent->i) { if (ent->str[0] != '\0') DPRINTK(PROBE, INFO, "%s\n", ent->str); return 0; } } } break; default: BUG(); } DPRINTK(PROBE, INFO, "Invalid %s value specified (%i) %s\n", opt->name, *value, opt->err); *value = opt->def; return -1; } static void e1000_check_fiber_options(struct e1000_adapter *adapter); static void e1000_check_copper_options(struct e1000_adapter *adapter); /** * e1000_check_options - Range Checking for Command Line Parameters * @adapter: board private structure * * This routine checks all command line parameters for valid user * input. If an invalid value is given, or if no user specified * value exists, a default value is used. The final value is stored * in a variable in the adapter structure. **/ void __devinit e1000_check_options(struct e1000_adapter *adapter) { int bd = adapter->bd_number; if (bd >= E1000_MAX_NIC) { DPRINTK(PROBE, NOTICE, "Warning: no configuration for board #%i\n", bd); DPRINTK(PROBE, NOTICE, "Using defaults for all values\n"); } { /* Transmit Descriptor Count */ struct e1000_option opt = { .type = range_option, .name = "Transmit Descriptors", .err = "using default of " __MODULE_STRING(E1000_DEFAULT_TXD), .def = E1000_DEFAULT_TXD, .arg = { .r = { .min = E1000_MIN_TXD }} }; struct e1000_tx_ring *tx_ring = adapter->tx_ring; int i; e1000_mac_type mac_type = adapter->hw.mac_type; opt.arg.r.max = mac_type < e1000_82544 ? E1000_MAX_TXD : E1000_MAX_82544_TXD; if (num_TxDescriptors > bd) { tx_ring->count = TxDescriptors[bd]; e1000_validate_option(&tx_ring->count, &opt, adapter); E1000_ROUNDUP(tx_ring->count, REQ_TX_DESCRIPTOR_MULTIPLE); } else { tx_ring->count = opt.def; } for (i = 0; i < adapter->num_tx_queues; i++) tx_ring[i].count = tx_ring->count; } { /* Receive Descriptor Count */ struct e1000_option opt = { .type = range_option, .name = "Receive Descriptors", .err = "using default of " __MODULE_STRING(E1000_DEFAULT_RXD), .def = E1000_DEFAULT_RXD, .arg = { .r = { .min = E1000_MIN_RXD }} }; struct e1000_rx_ring *rx_ring = adapter->rx_ring; int i; e1000_mac_type mac_type = adapter->hw.mac_type; opt.arg.r.max = mac_type < e1000_82544 ? E1000_MAX_RXD : E1000_MAX_82544_RXD; if (num_RxDescriptors > bd) { rx_ring->count = RxDescriptors[bd]; e1000_validate_option(&rx_ring->count, &opt, adapter); E1000_ROUNDUP(rx_ring->count, REQ_RX_DESCRIPTOR_MULTIPLE); } else { rx_ring->count = opt.def; } for (i = 0; i < adapter->num_rx_queues; i++) rx_ring[i].count = rx_ring->count; } { /* Checksum Offload Enable/Disable */ struct e1000_option opt = { .type = enable_option, .name = "Checksum Offload", .err = "defaulting to Enabled", .def = OPTION_ENABLED }; if (num_XsumRX > bd) { int rx_csum = XsumRX[bd]; e1000_validate_option(&rx_csum, &opt, adapter); adapter->rx_csum = rx_csum; } else { adapter->rx_csum = opt.def; } } { /* Flow Control */ struct e1000_opt_list fc_list[] = {{ e1000_fc_none, "Flow Control Disabled" }, { e1000_fc_rx_pause,"Flow Control Receive Only" }, { e1000_fc_tx_pause,"Flow Control Transmit Only" }, { e1000_fc_full, "Flow Control Enabled" }, { e1000_fc_default, "Flow Control Hardware Default" }}; struct e1000_option opt = { .type = list_option, .name = "Flow Control", .err = "reading default settings from EEPROM", .def = e1000_fc_default, .arg = { .l = { .nr = ARRAY_SIZE(fc_list), .p = fc_list }} }; if (num_FlowControl > bd) { int fc = FlowControl[bd]; e1000_validate_option(&fc, &opt, adapter); adapter->hw.fc = adapter->hw.original_fc = fc; } else { adapter->hw.fc = adapter->hw.original_fc = opt.def; } } { /* Transmit Interrupt Delay */ struct e1000_option opt = { .type = range_option, .name = "Transmit Interrupt Delay", .err = "using default of " __MODULE_STRING(DEFAULT_TIDV), .def = DEFAULT_TIDV, .arg = { .r = { .min = MIN_TXDELAY, .max = MAX_TXDELAY }} }; if (num_TxIntDelay > bd) { adapter->tx_int_delay = TxIntDelay[bd]; e1000_validate_option(&adapter->tx_int_delay, &opt, adapter); } else { adapter->tx_int_delay = opt.def; } } { /* Transmit Absolute Interrupt Delay */ struct e1000_option opt = { .type = range_option, .name = "Transmit Absolute Interrupt Delay", .err = "using default of " __MODULE_STRING(DEFAULT_TADV), .def = DEFAULT_TADV, .arg = { .r = { .min = MIN_TXABSDELAY, .max = MAX_TXABSDELAY }} }; if (num_TxAbsIntDelay > bd) { adapter->tx_abs_int_delay = TxAbsIntDelay[bd]; e1000_validate_option(&adapter->tx_abs_int_delay, &opt, adapter); } else { adapter->tx_abs_int_delay = opt.def; } } { /* Receive Interrupt Delay */ struct e1000_option opt = { .type = range_option, .name = "Receive Interrupt Delay", .err = "using default of " __MODULE_STRING(DEFAULT_RDTR), .def = DEFAULT_RDTR, .arg = { .r = { .min = MIN_RXDELAY, .max = MAX_RXDELAY }} }; if (num_RxIntDelay > bd) { adapter->rx_int_delay = RxIntDelay[bd]; e1000_validate_option(&adapter->rx_int_delay, &opt, adapter); } else { adapter->rx_int_delay = opt.def; } } { /* Receive Absolute Interrupt Delay */ struct e1000_option opt = { .type = range_option, .name = "Receive Absolute Interrupt Delay", .err = "using default of " __MODULE_STRING(DEFAULT_RADV), .def = DEFAULT_RADV, .arg = { .r = { .min = MIN_RXABSDELAY, .max = MAX_RXABSDELAY }} }; if (num_RxAbsIntDelay > bd) { adapter->rx_abs_int_delay = RxAbsIntDelay[bd]; e1000_validate_option(&adapter->rx_abs_int_delay, &opt, adapter); } else { adapter->rx_abs_int_delay = opt.def; } } { /* Interrupt Throttling Rate */ struct e1000_option opt = { .type = range_option, .name = "Interrupt Throttling Rate (ints/sec)", .err = "using default of " __MODULE_STRING(DEFAULT_ITR), .def = DEFAULT_ITR, .arg = { .r = { .min = MIN_ITR, .max = MAX_ITR }} }; if (num_InterruptThrottleRate > bd) { adapter->itr = InterruptThrottleRate[bd]; switch (adapter->itr) { case 0: DPRINTK(PROBE, INFO, "%s turned off\n", opt.name); break; case 1: DPRINTK(PROBE, INFO, "%s set to dynamic mode\n", opt.name); break; default: e1000_validate_option(&adapter->itr, &opt, adapter); break; } } else { adapter->itr = opt.def; } } { /* Smart Power Down */ struct e1000_option opt = { .type = enable_option, .name = "PHY Smart Power Down", .err = "defaulting to Disabled", .def = OPTION_DISABLED }; if (num_SmartPowerDownEnable > bd) { int spd = SmartPowerDownEnable[bd]; e1000_validate_option(&spd, &opt, adapter); adapter->smart_power_down = spd; } else { adapter->smart_power_down = opt.def; } } switch (adapter->hw.media_type) { case e1000_media_type_fiber: case e1000_media_type_internal_serdes: e1000_check_fiber_options(adapter); break; case e1000_media_type_copper: e1000_check_copper_options(adapter); break; default: BUG(); } } /** * e1000_check_fiber_options - Range Checking for Link Options, Fiber Version * @adapter: board private structure * * Handles speed and duplex options on fiber adapters **/ static void __devinit e1000_check_fiber_options(struct e1000_adapter *adapter) { int bd = adapter->bd_number; if (num_Speed > bd) { DPRINTK(PROBE, INFO, "Speed not valid for fiber adapters, " "parameter ignored\n"); } if (num_Duplex > bd) { DPRINTK(PROBE, INFO, "Duplex not valid for fiber adapters, " "parameter ignored\n"); } if ((num_AutoNeg > bd) && (AutoNeg[bd] != 0x20)) { DPRINTK(PROBE, INFO, "AutoNeg other than 1000/Full is " "not valid for fiber adapters, " "parameter ignored\n"); } } /** * e1000_check_copper_options - Range Checking for Link Options, Copper Version * @adapter: board private structure * * Handles speed and duplex options on copper adapters **/ static void __devinit e1000_check_copper_options(struct e1000_adapter *adapter) { int speed, dplx, an; int bd = adapter->bd_number; { /* Speed */ struct e1000_opt_list speed_list[] = {{ 0, "" }, { SPEED_10, "" }, { SPEED_100, "" }, { SPEED_1000, "" }}; struct e1000_option opt = { .type = list_option, .name = "Speed", .err = "parameter ignored", .def = 0, .arg = { .l = { .nr = ARRAY_SIZE(speed_list), .p = speed_list }} }; if (num_Speed > bd) { speed = Speed[bd]; e1000_validate_option(&speed, &opt, adapter); } else { speed = opt.def; } } { /* Duplex */ struct e1000_opt_list dplx_list[] = {{ 0, "" }, { HALF_DUPLEX, "" }, { FULL_DUPLEX, "" }}; struct e1000_option opt = { .type = list_option, .name = "Duplex", .err = "parameter ignored", .def = 0, .arg = { .l = { .nr = ARRAY_SIZE(dplx_list), .p = dplx_list }} }; if (e1000_check_phy_reset_block(&adapter->hw)) { DPRINTK(PROBE, INFO, "Link active due to SoL/IDER Session. " "Speed/Duplex/AutoNeg parameter ignored.\n"); return; } if (num_Duplex > bd) { dplx = Duplex[bd]; e1000_validate_option(&dplx, &opt, adapter); } else { dplx = opt.def; } } if ((num_AutoNeg > bd) && (speed != 0 || dplx != 0)) { DPRINTK(PROBE, INFO, "AutoNeg specified along with Speed or Duplex, " "parameter ignored\n"); adapter->hw.autoneg_advertised = AUTONEG_ADV_DEFAULT; } else { /* Autoneg */ struct e1000_opt_list an_list[] = #define AA "AutoNeg advertising " {{ 0x01, AA "10/HD" }, { 0x02, AA "10/FD" }, { 0x03, AA "10/FD, 10/HD" }, { 0x04, AA "100/HD" }, { 0x05, AA "100/HD, 10/HD" }, { 0x06, AA "100/HD, 10/FD" }, { 0x07, AA "100/HD, 10/FD, 10/HD" }, { 0x08, AA "100/FD" }, { 0x09, AA "100/FD, 10/HD" }, { 0x0a, AA "100/FD, 10/FD" }, { 0x0b, AA "100/FD, 10/FD, 10/HD" }, { 0x0c, AA "100/FD, 100/HD" }, { 0x0d, AA "100/FD, 100/HD, 10/HD" }, { 0x0e, AA "100/FD, 100/HD, 10/FD" }, { 0x0f, AA "100/FD, 100/HD, 10/FD, 10/HD" }, { 0x20, AA "1000/FD" }, { 0x21, AA "1000/FD, 10/HD" }, { 0x22, AA "1000/FD, 10/FD" }, { 0x23, AA "1000/FD, 10/FD, 10/HD" }, { 0x24, AA "1000/FD, 100/HD" }, { 0x25, AA "1000/FD, 100/HD, 10/HD" }, { 0x26, AA "1000/FD, 100/HD, 10/FD" }, { 0x27, AA "1000/FD, 100/HD, 10/FD, 10/HD" }, { 0x28, AA "1000/FD, 100/FD" }, { 0x29, AA "1000/FD, 100/FD, 10/HD" }, { 0x2a, AA "1000/FD, 100/FD, 10/FD" }, { 0x2b, AA "1000/FD, 100/FD, 10/FD, 10/HD" }, { 0x2c, AA "1000/FD, 100/FD, 100/HD" }, { 0x2d, AA "1000/FD, 100/FD, 100/HD, 10/HD" }, { 0x2e, AA "1000/FD, 100/FD, 100/HD, 10/FD" }, { 0x2f, AA "1000/FD, 100/FD, 100/HD, 10/FD, 10/HD" }}; struct e1000_option opt = { .type = list_option, .name = "AutoNeg", .err = "parameter ignored", .def = AUTONEG_ADV_DEFAULT, .arg = { .l = { .nr = ARRAY_SIZE(an_list), .p = an_list }} }; if (num_AutoNeg > bd) { an = AutoNeg[bd]; e1000_validate_option(&an, &opt, adapter); } else { an = opt.def; } adapter->hw.autoneg_advertised = an; } switch (speed + dplx) { case 0: adapter->hw.autoneg = adapter->fc_autoneg = 1; if ((num_Speed > bd) && (speed != 0 || dplx != 0)) DPRINTK(PROBE, INFO, "Speed and duplex autonegotiation enabled\n"); break; case HALF_DUPLEX: DPRINTK(PROBE, INFO, "Half Duplex specified without Speed\n"); DPRINTK(PROBE, INFO, "Using Autonegotiation at " "Half Duplex only\n"); adapter->hw.autoneg = adapter->fc_autoneg = 1; adapter->hw.autoneg_advertised = ADVERTISE_10_HALF | ADVERTISE_100_HALF; break; case FULL_DUPLEX: DPRINTK(PROBE, INFO, "Full Duplex specified without Speed\n"); DPRINTK(PROBE, INFO, "Using Autonegotiation at " "Full Duplex only\n"); adapter->hw.autoneg = adapter->fc_autoneg = 1; adapter->hw.autoneg_advertised = ADVERTISE_10_FULL | ADVERTISE_100_FULL | ADVERTISE_1000_FULL; break; case SPEED_10: DPRINTK(PROBE, INFO, "10 Mbps Speed specified " "without Duplex\n"); DPRINTK(PROBE, INFO, "Using Autonegotiation at 10 Mbps only\n"); adapter->hw.autoneg = adapter->fc_autoneg = 1; adapter->hw.autoneg_advertised = ADVERTISE_10_HALF | ADVERTISE_10_FULL; break; case SPEED_10 + HALF_DUPLEX: DPRINTK(PROBE, INFO, "Forcing to 10 Mbps Half Duplex\n"); adapter->hw.autoneg = adapter->fc_autoneg = 0; adapter->hw.forced_speed_duplex = e1000_10_half; adapter->hw.autoneg_advertised = 0; break; case SPEED_10 + FULL_DUPLEX: DPRINTK(PROBE, INFO, "Forcing to 10 Mbps Full Duplex\n"); adapter->hw.autoneg = adapter->fc_autoneg = 0; adapter->hw.forced_speed_duplex = e1000_10_full; adapter->hw.autoneg_advertised = 0; break; case SPEED_100: DPRINTK(PROBE, INFO, "100 Mbps Speed specified " "without Duplex\n"); DPRINTK(PROBE, INFO, "Using Autonegotiation at " "100 Mbps only\n"); adapter->hw.autoneg = adapter->fc_autoneg = 1; adapter->hw.autoneg_advertised = ADVERTISE_100_HALF | ADVERTISE_100_FULL; break; case SPEED_100 + HALF_DUPLEX: DPRINTK(PROBE, INFO, "Forcing to 100 Mbps Half Duplex\n"); adapter->hw.autoneg = adapter->fc_autoneg = 0; adapter->hw.forced_speed_duplex = e1000_100_half; adapter->hw.autoneg_advertised = 0; break; case SPEED_100 + FULL_DUPLEX: DPRINTK(PROBE, INFO, "Forcing to 100 Mbps Full Duplex\n"); adapter->hw.autoneg = adapter->fc_autoneg = 0; adapter->hw.forced_speed_duplex = e1000_100_full; adapter->hw.autoneg_advertised = 0; break; case SPEED_1000: DPRINTK(PROBE, INFO, "1000 Mbps Speed specified without " "Duplex\n"); DPRINTK(PROBE, INFO, "Using Autonegotiation at 1000 Mbps " "Full Duplex only\n"); adapter->hw.autoneg = adapter->fc_autoneg = 1; adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL; break; case SPEED_1000 + HALF_DUPLEX: DPRINTK(PROBE, INFO, "Half Duplex is not supported at 1000 Mbps\n"); DPRINTK(PROBE, INFO, "Using Autonegotiation at 1000 Mbps " "Full Duplex only\n"); adapter->hw.autoneg = adapter->fc_autoneg = 1; adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL; break; case SPEED_1000 + FULL_DUPLEX: DPRINTK(PROBE, INFO, "Using Autonegotiation at 1000 Mbps Full Duplex only\n"); adapter->hw.autoneg = adapter->fc_autoneg = 1; adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL; break; default: BUG(); } /* Speed, AutoNeg and MDI/MDI-X must all play nice */ if (e1000_validate_mdi_setting(&(adapter->hw)) < 0) { DPRINTK(PROBE, INFO, "Speed, AutoNeg and MDI-X specifications are " "incompatible. Setting MDI-X to a compatible value.\n"); } }