// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 1999 - 2010 Intel Corporation.
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* Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
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*
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* This code was derived from the Intel e1000e Linux driver.
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*/
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#include "pch_gbe.h"
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#include <linux/module.h> /* for __MODULE_STRING */
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#define OPTION_UNSET -1
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#define OPTION_DISABLED 0
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#define OPTION_ENABLED 1
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/*
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* TxDescriptors - Transmit Descriptor Count
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* @Valid Range: PCH_GBE_MIN_TXD - PCH_GBE_MAX_TXD
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* @Default Value: PCH_GBE_DEFAULT_TXD
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*/
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static int TxDescriptors = OPTION_UNSET;
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module_param(TxDescriptors, int, 0);
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MODULE_PARM_DESC(TxDescriptors, "Number of transmit descriptors");
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/*
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* RxDescriptors -Receive Descriptor Count
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* @Valid Range: PCH_GBE_MIN_RXD - PCH_GBE_MAX_RXD
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* @Default Value: PCH_GBE_DEFAULT_RXD
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*/
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static int RxDescriptors = OPTION_UNSET;
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module_param(RxDescriptors, int, 0);
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MODULE_PARM_DESC(RxDescriptors, "Number of receive descriptors");
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/*
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* Speed - User Specified Speed Override
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* @Valid Range: 0, 10, 100, 1000
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* - 0: auto-negotiate at all supported speeds
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* - 10: only link at 10 Mbps
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* - 100: only link at 100 Mbps
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* - 1000: only link at 1000 Mbps
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* @Default Value: 0
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*/
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static int Speed = OPTION_UNSET;
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module_param(Speed, int, 0);
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MODULE_PARM_DESC(Speed, "Speed setting");
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/*
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* Duplex - User Specified Duplex Override
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* @Valid Range: 0-2
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* - 0: auto-negotiate for duplex
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* - 1: only link at half duplex
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* - 2: only link at full duplex
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* @Default Value: 0
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*/
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static int Duplex = OPTION_UNSET;
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module_param(Duplex, int, 0);
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MODULE_PARM_DESC(Duplex, "Duplex setting");
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#define HALF_DUPLEX 1
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#define FULL_DUPLEX 2
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/*
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* AutoNeg - Auto-negotiation Advertisement Override
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* @Valid Range: 0x01-0x0F, 0x20-0x2F
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*
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* The AutoNeg value is a bit mask describing which speed and duplex
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* combinations should be advertised during auto-negotiation.
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* The supported speed and duplex modes are listed below
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*
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* Bit 7 6 5 4 3 2 1 0
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* Speed (Mbps) N/A N/A 1000 N/A 100 100 10 10
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* Duplex Full Full Half Full Half
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*
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* @Default Value: 0x2F (copper)
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*/
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static int AutoNeg = OPTION_UNSET;
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module_param(AutoNeg, int, 0);
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MODULE_PARM_DESC(AutoNeg, "Advertised auto-negotiation setting");
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#define PHY_ADVERTISE_10_HALF 0x0001
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#define PHY_ADVERTISE_10_FULL 0x0002
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#define PHY_ADVERTISE_100_HALF 0x0004
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#define PHY_ADVERTISE_100_FULL 0x0008
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#define PHY_ADVERTISE_1000_HALF 0x0010 /* Not used, just FYI */
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#define PHY_ADVERTISE_1000_FULL 0x0020
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#define PCH_AUTONEG_ADVERTISE_DEFAULT 0x2F
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/*
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* FlowControl - User Specified Flow Control Override
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* @Valid Range: 0-3
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* - 0: No Flow Control
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* - 1: Rx only, respond to PAUSE frames but do not generate them
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* - 2: Tx only, generate PAUSE frames but ignore them on receive
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* - 3: Full Flow Control Support
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* @Default Value: Read flow control settings from the EEPROM
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*/
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static int FlowControl = OPTION_UNSET;
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module_param(FlowControl, int, 0);
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MODULE_PARM_DESC(FlowControl, "Flow Control setting");
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/*
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* XsumRX - Receive Checksum Offload Enable/Disable
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* @Valid Range: 0, 1
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* - 0: disables all checksum offload
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* - 1: enables receive IP/TCP/UDP checksum offload
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* @Default Value: PCH_GBE_DEFAULT_RX_CSUM
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*/
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static int XsumRX = OPTION_UNSET;
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module_param(XsumRX, int, 0);
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MODULE_PARM_DESC(XsumRX, "Disable or enable Receive Checksum offload");
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#define PCH_GBE_DEFAULT_RX_CSUM true /* trueorfalse */
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/*
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* XsumTX - Transmit Checksum Offload Enable/Disable
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* @Valid Range: 0, 1
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* - 0: disables all checksum offload
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* - 1: enables transmit IP/TCP/UDP checksum offload
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* @Default Value: PCH_GBE_DEFAULT_TX_CSUM
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*/
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static int XsumTX = OPTION_UNSET;
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module_param(XsumTX, int, 0);
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MODULE_PARM_DESC(XsumTX, "Disable or enable Transmit Checksum offload");
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#define PCH_GBE_DEFAULT_TX_CSUM true /* trueorfalse */
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/*
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* pch_gbe_option - Force the MAC's flow control settings
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* @hw: Pointer to the HW structure
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* Returns:
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* 0: Successful.
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* Negative value: Failed.
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*/
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struct pch_gbe_option {
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enum { enable_option, range_option, list_option } type;
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char *name;
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char *err;
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int def;
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union {
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struct { /* range_option info */
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int min;
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int max;
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} r;
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struct { /* list_option info */
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int nr;
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const struct pch_gbe_opt_list { int i; char *str; } *p;
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} l;
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} arg;
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};
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static const struct pch_gbe_opt_list speed_list[] = {
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{ 0, "" },
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{ SPEED_10, "" },
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{ SPEED_100, "" },
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{ SPEED_1000, "" }
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};
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static const struct pch_gbe_opt_list dplx_list[] = {
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{ 0, "" },
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{ HALF_DUPLEX, "" },
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{ FULL_DUPLEX, "" }
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};
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static const struct pch_gbe_opt_list an_list[] =
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#define AA "AutoNeg advertising "
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{{ 0x01, AA "10/HD" },
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{ 0x02, AA "10/FD" },
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{ 0x03, AA "10/FD, 10/HD" },
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{ 0x04, AA "100/HD" },
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{ 0x05, AA "100/HD, 10/HD" },
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{ 0x06, AA "100/HD, 10/FD" },
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{ 0x07, AA "100/HD, 10/FD, 10/HD" },
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{ 0x08, AA "100/FD" },
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{ 0x09, AA "100/FD, 10/HD" },
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{ 0x0a, AA "100/FD, 10/FD" },
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{ 0x0b, AA "100/FD, 10/FD, 10/HD" },
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{ 0x0c, AA "100/FD, 100/HD" },
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{ 0x0d, AA "100/FD, 100/HD, 10/HD" },
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{ 0x0e, AA "100/FD, 100/HD, 10/FD" },
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{ 0x0f, AA "100/FD, 100/HD, 10/FD, 10/HD" },
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{ 0x20, AA "1000/FD" },
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{ 0x21, AA "1000/FD, 10/HD" },
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{ 0x22, AA "1000/FD, 10/FD" },
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{ 0x23, AA "1000/FD, 10/FD, 10/HD" },
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{ 0x24, AA "1000/FD, 100/HD" },
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{ 0x25, AA "1000/FD, 100/HD, 10/HD" },
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{ 0x26, AA "1000/FD, 100/HD, 10/FD" },
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{ 0x27, AA "1000/FD, 100/HD, 10/FD, 10/HD" },
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{ 0x28, AA "1000/FD, 100/FD" },
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{ 0x29, AA "1000/FD, 100/FD, 10/HD" },
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{ 0x2a, AA "1000/FD, 100/FD, 10/FD" },
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{ 0x2b, AA "1000/FD, 100/FD, 10/FD, 10/HD" },
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{ 0x2c, AA "1000/FD, 100/FD, 100/HD" },
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{ 0x2d, AA "1000/FD, 100/FD, 100/HD, 10/HD" },
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{ 0x2e, AA "1000/FD, 100/FD, 100/HD, 10/FD" },
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{ 0x2f, AA "1000/FD, 100/FD, 100/HD, 10/FD, 10/HD" }
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};
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static const struct pch_gbe_opt_list fc_list[] = {
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{ PCH_GBE_FC_NONE, "Flow Control Disabled" },
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{ PCH_GBE_FC_RX_PAUSE, "Flow Control Receive Only" },
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{ PCH_GBE_FC_TX_PAUSE, "Flow Control Transmit Only" },
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{ PCH_GBE_FC_FULL, "Flow Control Enabled" }
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};
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/**
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* pch_gbe_validate_option - Validate option
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* @value: value
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* @opt: option
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* @adapter: Board private structure
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* Returns:
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* 0: Successful.
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* Negative value: Failed.
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*/
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static int pch_gbe_validate_option(int *value,
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const struct pch_gbe_option *opt,
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struct pch_gbe_adapter *adapter)
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{
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if (*value == OPTION_UNSET) {
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*value = opt->def;
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return 0;
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}
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switch (opt->type) {
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case enable_option:
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switch (*value) {
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case OPTION_ENABLED:
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netdev_dbg(adapter->netdev, "%s Enabled\n", opt->name);
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return 0;
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case OPTION_DISABLED:
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netdev_dbg(adapter->netdev, "%s Disabled\n", opt->name);
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return 0;
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}
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break;
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case range_option:
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if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
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netdev_dbg(adapter->netdev, "%s set to %i\n",
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opt->name, *value);
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return 0;
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}
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break;
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case list_option: {
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int i;
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const struct pch_gbe_opt_list *ent;
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for (i = 0; i < opt->arg.l.nr; i++) {
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ent = &opt->arg.l.p[i];
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if (*value == ent->i) {
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if (ent->str[0] != '\0')
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netdev_dbg(adapter->netdev, "%s\n",
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ent->str);
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return 0;
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}
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}
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}
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break;
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default:
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BUG();
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}
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netdev_dbg(adapter->netdev, "Invalid %s value specified (%i) %s\n",
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opt->name, *value, opt->err);
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*value = opt->def;
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return -1;
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}
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/**
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* pch_gbe_check_copper_options - Range Checking for Link Options, Copper Version
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* @adapter: Board private structure
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*/
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static void pch_gbe_check_copper_options(struct pch_gbe_adapter *adapter)
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{
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struct pch_gbe_hw *hw = &adapter->hw;
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int speed, dplx;
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{ /* Speed */
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static const struct pch_gbe_option opt = {
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.type = list_option,
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.name = "Speed",
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.err = "parameter ignored",
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.def = 0,
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.arg = { .l = { .nr = (int)ARRAY_SIZE(speed_list),
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.p = speed_list } }
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};
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speed = Speed;
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pch_gbe_validate_option(&speed, &opt, adapter);
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}
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{ /* Duplex */
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static const struct pch_gbe_option opt = {
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.type = list_option,
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.name = "Duplex",
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.err = "parameter ignored",
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.def = 0,
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.arg = { .l = { .nr = (int)ARRAY_SIZE(dplx_list),
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.p = dplx_list } }
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};
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dplx = Duplex;
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pch_gbe_validate_option(&dplx, &opt, adapter);
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}
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{ /* Autoneg */
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static const struct pch_gbe_option opt = {
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.type = list_option,
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.name = "AutoNeg",
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.err = "parameter ignored",
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.def = PCH_AUTONEG_ADVERTISE_DEFAULT,
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.arg = { .l = { .nr = (int)ARRAY_SIZE(an_list),
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.p = an_list} }
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};
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if (speed || dplx) {
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netdev_dbg(adapter->netdev,
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"AutoNeg specified along with Speed or Duplex, AutoNeg parameter ignored\n");
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hw->phy.autoneg_advertised = opt.def;
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} else {
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int tmp = AutoNeg;
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pch_gbe_validate_option(&tmp, &opt, adapter);
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hw->phy.autoneg_advertised = tmp;
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}
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}
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switch (speed + dplx) {
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case 0:
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hw->mac.autoneg = hw->mac.fc_autoneg = 1;
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if ((speed || dplx))
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netdev_dbg(adapter->netdev,
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"Speed and duplex autonegotiation enabled\n");
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hw->mac.link_speed = SPEED_10;
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hw->mac.link_duplex = DUPLEX_HALF;
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break;
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case HALF_DUPLEX:
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netdev_dbg(adapter->netdev,
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"Half Duplex specified without Speed\n");
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netdev_dbg(adapter->netdev,
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"Using Autonegotiation at Half Duplex only\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 1;
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hw->phy.autoneg_advertised = PHY_ADVERTISE_10_HALF |
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PHY_ADVERTISE_100_HALF;
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hw->mac.link_speed = SPEED_10;
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hw->mac.link_duplex = DUPLEX_HALF;
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break;
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case FULL_DUPLEX:
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netdev_dbg(adapter->netdev,
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"Full Duplex specified without Speed\n");
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netdev_dbg(adapter->netdev,
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"Using Autonegotiation at Full Duplex only\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 1;
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hw->phy.autoneg_advertised = PHY_ADVERTISE_10_FULL |
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PHY_ADVERTISE_100_FULL |
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PHY_ADVERTISE_1000_FULL;
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hw->mac.link_speed = SPEED_10;
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hw->mac.link_duplex = DUPLEX_FULL;
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break;
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case SPEED_10:
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netdev_dbg(adapter->netdev,
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"10 Mbps Speed specified without Duplex\n");
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netdev_dbg(adapter->netdev,
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"Using Autonegotiation at 10 Mbps only\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 1;
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hw->phy.autoneg_advertised = PHY_ADVERTISE_10_HALF |
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PHY_ADVERTISE_10_FULL;
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hw->mac.link_speed = SPEED_10;
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hw->mac.link_duplex = DUPLEX_HALF;
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break;
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case SPEED_10 + HALF_DUPLEX:
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netdev_dbg(adapter->netdev, "Forcing to 10 Mbps Half Duplex\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 0;
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hw->phy.autoneg_advertised = 0;
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hw->mac.link_speed = SPEED_10;
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hw->mac.link_duplex = DUPLEX_HALF;
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break;
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case SPEED_10 + FULL_DUPLEX:
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netdev_dbg(adapter->netdev, "Forcing to 10 Mbps Full Duplex\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 0;
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hw->phy.autoneg_advertised = 0;
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hw->mac.link_speed = SPEED_10;
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hw->mac.link_duplex = DUPLEX_FULL;
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break;
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case SPEED_100:
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netdev_dbg(adapter->netdev,
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"100 Mbps Speed specified without Duplex\n");
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netdev_dbg(adapter->netdev,
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"Using Autonegotiation at 100 Mbps only\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 1;
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hw->phy.autoneg_advertised = PHY_ADVERTISE_100_HALF |
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PHY_ADVERTISE_100_FULL;
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hw->mac.link_speed = SPEED_100;
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hw->mac.link_duplex = DUPLEX_HALF;
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break;
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case SPEED_100 + HALF_DUPLEX:
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netdev_dbg(adapter->netdev,
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"Forcing to 100 Mbps Half Duplex\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 0;
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hw->phy.autoneg_advertised = 0;
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hw->mac.link_speed = SPEED_100;
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hw->mac.link_duplex = DUPLEX_HALF;
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break;
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case SPEED_100 + FULL_DUPLEX:
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netdev_dbg(adapter->netdev,
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"Forcing to 100 Mbps Full Duplex\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 0;
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hw->phy.autoneg_advertised = 0;
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hw->mac.link_speed = SPEED_100;
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hw->mac.link_duplex = DUPLEX_FULL;
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break;
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case SPEED_1000:
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netdev_dbg(adapter->netdev,
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"1000 Mbps Speed specified without Duplex\n");
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goto full_duplex_only;
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case SPEED_1000 + HALF_DUPLEX:
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netdev_dbg(adapter->netdev,
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"Half Duplex is not supported at 1000 Mbps\n");
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fallthrough;
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case SPEED_1000 + FULL_DUPLEX:
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full_duplex_only:
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netdev_dbg(adapter->netdev,
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"Using Autonegotiation at 1000 Mbps Full Duplex only\n");
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hw->mac.autoneg = hw->mac.fc_autoneg = 1;
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hw->phy.autoneg_advertised = PHY_ADVERTISE_1000_FULL;
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hw->mac.link_speed = SPEED_1000;
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hw->mac.link_duplex = DUPLEX_FULL;
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break;
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default:
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BUG();
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}
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}
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/**
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* pch_gbe_check_options - Range Checking for Command Line Parameters
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* @adapter: Board private structure
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*/
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void pch_gbe_check_options(struct pch_gbe_adapter *adapter)
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{
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struct pch_gbe_hw *hw = &adapter->hw;
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struct net_device *dev = adapter->netdev;
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int val;
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{ /* Transmit Descriptor Count */
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static const struct pch_gbe_option opt = {
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.type = range_option,
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.name = "Transmit Descriptors",
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.err = "using default of "
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__MODULE_STRING(PCH_GBE_DEFAULT_TXD),
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.def = PCH_GBE_DEFAULT_TXD,
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.arg = { .r = { .min = PCH_GBE_MIN_TXD,
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.max = PCH_GBE_MAX_TXD } }
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};
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struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
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tx_ring->count = TxDescriptors;
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pch_gbe_validate_option(&tx_ring->count, &opt, adapter);
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tx_ring->count = roundup(tx_ring->count,
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PCH_GBE_TX_DESC_MULTIPLE);
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}
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{ /* Receive Descriptor Count */
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static const struct pch_gbe_option opt = {
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.type = range_option,
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.name = "Receive Descriptors",
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.err = "using default of "
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__MODULE_STRING(PCH_GBE_DEFAULT_RXD),
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.def = PCH_GBE_DEFAULT_RXD,
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.arg = { .r = { .min = PCH_GBE_MIN_RXD,
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.max = PCH_GBE_MAX_RXD } }
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};
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struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
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rx_ring->count = RxDescriptors;
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pch_gbe_validate_option(&rx_ring->count, &opt, adapter);
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rx_ring->count = roundup(rx_ring->count,
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PCH_GBE_RX_DESC_MULTIPLE);
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}
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{ /* Checksum Offload Enable/Disable */
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static const struct pch_gbe_option opt = {
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.type = enable_option,
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.name = "Checksum Offload",
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.err = "defaulting to Enabled",
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.def = PCH_GBE_DEFAULT_RX_CSUM
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};
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val = XsumRX;
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pch_gbe_validate_option(&val, &opt, adapter);
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if (!val)
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dev->features &= ~NETIF_F_RXCSUM;
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}
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{ /* Checksum Offload Enable/Disable */
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static const struct pch_gbe_option opt = {
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.type = enable_option,
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.name = "Checksum Offload",
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.err = "defaulting to Enabled",
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.def = PCH_GBE_DEFAULT_TX_CSUM
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};
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val = XsumTX;
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pch_gbe_validate_option(&val, &opt, adapter);
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if (!val)
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dev->features &= ~NETIF_F_CSUM_MASK;
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}
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{ /* Flow Control */
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static const struct pch_gbe_option opt = {
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.type = list_option,
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.name = "Flow Control",
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.err = "reading default settings from EEPROM",
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.def = PCH_GBE_FC_DEFAULT,
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.arg = { .l = { .nr = (int)ARRAY_SIZE(fc_list),
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.p = fc_list } }
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};
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int tmp = FlowControl;
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pch_gbe_validate_option(&tmp, &opt, adapter);
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hw->mac.fc = tmp;
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}
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pch_gbe_check_copper_options(adapter);
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}
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