diff options
Diffstat (limited to 'drivers/net/ethernet/intel/ixgb/ixgb_param.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgb/ixgb_param.c | 442 |
1 files changed, 442 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_param.c b/drivers/net/ethernet/intel/ixgb/ixgb_param.c new file mode 100644 index 000000000..d40f96250 --- /dev/null +++ b/drivers/net/ethernet/intel/ixgb/ixgb_param.c @@ -0,0 +1,442 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 1999 - 2008 Intel Corporation. */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include "ixgb.h" + +/* This is the only thing that needs to be changed to adjust the + * maximum number of ports that the driver can manage. + */ + +#define IXGB_MAX_NIC 8 + +#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 IXGB_PARAM_INIT { [0 ... IXGB_MAX_NIC] = OPTION_UNSET } +#define IXGB_PARAM(X, desc) \ + static int X[IXGB_MAX_NIC+1] \ + = IXGB_PARAM_INIT; \ + static unsigned int num_##X = 0; \ + module_param_array_named(X, X, int, &num_##X, 0); \ + MODULE_PARM_DESC(X, desc); + +/* Transmit Descriptor Count + * + * Valid Range: 64-4096 + * + * Default Value: 256 + */ + +IXGB_PARAM(TxDescriptors, "Number of transmit descriptors"); + +/* Receive Descriptor Count + * + * Valid Range: 64-4096 + * + * Default Value: 1024 + */ + +IXGB_PARAM(RxDescriptors, "Number of receive descriptors"); + +/* 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: 2 - Tx only (silicon bug avoidance) + */ + +IXGB_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 82597 based NICs + * + * Default Value: 1 + */ + +IXGB_PARAM(XsumRX, "Disable or enable Receive Checksum offload"); + +/* Transmit Interrupt Delay in units of 0.8192 microseconds + * + * Valid Range: 0-65535 + * + * Default Value: 32 + */ + +IXGB_PARAM(TxIntDelay, "Transmit Interrupt Delay"); + +/* Receive Interrupt Delay in units of 0.8192 microseconds + * + * Valid Range: 0-65535 + * + * Default Value: 72 + */ + +IXGB_PARAM(RxIntDelay, "Receive Interrupt Delay"); + +/* Receive Flow control high threshold (when we send a pause frame) + * (FCRTH) + * + * Valid Range: 1,536 - 262,136 (0x600 - 0x3FFF8, 8 byte granularity) + * + * Default Value: 196,608 (0x30000) + */ + +IXGB_PARAM(RxFCHighThresh, "Receive Flow Control High Threshold"); + +/* Receive Flow control low threshold (when we send a resume frame) + * (FCRTL) + * + * Valid Range: 64 - 262,136 (0x40 - 0x3FFF8, 8 byte granularity) + * must be less than high threshold by at least 8 bytes + * + * Default Value: 163,840 (0x28000) + */ + +IXGB_PARAM(RxFCLowThresh, "Receive Flow Control Low Threshold"); + +/* Flow control request timeout (how long to pause the link partner's tx) + * (PAP 15:0) + * + * Valid Range: 1 - 65535 + * + * Default Value: 65535 (0xffff) (we'll send an xon if we recover) + */ + +IXGB_PARAM(FCReqTimeout, "Flow Control Request Timeout"); + +/* Interrupt Delay Enable + * + * Valid Range: 0, 1 + * + * - 0 - disables transmit interrupt delay + * - 1 - enables transmmit interrupt delay + * + * Default Value: 1 + */ + +IXGB_PARAM(IntDelayEnable, "Transmit Interrupt Delay Enable"); + + +#define DEFAULT_TIDV 32 +#define MAX_TIDV 0xFFFF +#define MIN_TIDV 0 + +#define DEFAULT_RDTR 72 +#define MAX_RDTR 0xFFFF +#define MIN_RDTR 0 + +#define DEFAULT_FCRTL 0x28000 +#define DEFAULT_FCRTH 0x30000 +#define MIN_FCRTL 0 +#define MAX_FCRTL 0x3FFE8 +#define MIN_FCRTH 8 +#define MAX_FCRTH 0x3FFF0 + +#define MIN_FCPAUSE 1 +#define MAX_FCPAUSE 0xffff +#define DEFAULT_FCPAUSE 0xFFFF /* this may be too long */ + +struct ixgb_option { + enum { enable_option, range_option, list_option } type; + const char *name; + const char *err; + int def; + union { + struct { /* range_option info */ + int min; + int max; + } r; + struct { /* list_option info */ + int nr; + const struct ixgb_opt_list { + int i; + const char *str; + } *p; + } l; + } arg; +}; + +static int +ixgb_validate_option(unsigned int *value, const struct ixgb_option *opt) +{ + if (*value == OPTION_UNSET) { + *value = opt->def; + return 0; + } + + switch (opt->type) { + case enable_option: + switch (*value) { + case OPTION_ENABLED: + pr_info("%s Enabled\n", opt->name); + return 0; + case OPTION_DISABLED: + pr_info("%s Disabled\n", opt->name); + return 0; + } + break; + case range_option: + if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) { + pr_info("%s set to %i\n", opt->name, *value); + return 0; + } + break; + case list_option: { + int i; + const struct ixgb_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') + pr_info("%s\n", ent->str); + return 0; + } + } + } + break; + default: + BUG(); + } + + pr_info("Invalid %s specified (%i) %s\n", opt->name, *value, opt->err); + *value = opt->def; + return -1; +} + +/** + * ixgb_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 +ixgb_check_options(struct ixgb_adapter *adapter) +{ + int bd = adapter->bd_number; + if (bd >= IXGB_MAX_NIC) { + pr_notice("Warning: no configuration for board #%i\n", bd); + pr_notice("Using defaults for all values\n"); + } + + { /* Transmit Descriptor Count */ + static const struct ixgb_option opt = { + .type = range_option, + .name = "Transmit Descriptors", + .err = "using default of " __MODULE_STRING(DEFAULT_TXD), + .def = DEFAULT_TXD, + .arg = { .r = { .min = MIN_TXD, + .max = MAX_TXD}} + }; + struct ixgb_desc_ring *tx_ring = &adapter->tx_ring; + + if (num_TxDescriptors > bd) { + tx_ring->count = TxDescriptors[bd]; + ixgb_validate_option(&tx_ring->count, &opt); + } else { + tx_ring->count = opt.def; + } + tx_ring->count = ALIGN(tx_ring->count, IXGB_REQ_TX_DESCRIPTOR_MULTIPLE); + } + { /* Receive Descriptor Count */ + static const struct ixgb_option opt = { + .type = range_option, + .name = "Receive Descriptors", + .err = "using default of " __MODULE_STRING(DEFAULT_RXD), + .def = DEFAULT_RXD, + .arg = { .r = { .min = MIN_RXD, + .max = MAX_RXD}} + }; + struct ixgb_desc_ring *rx_ring = &adapter->rx_ring; + + if (num_RxDescriptors > bd) { + rx_ring->count = RxDescriptors[bd]; + ixgb_validate_option(&rx_ring->count, &opt); + } else { + rx_ring->count = opt.def; + } + rx_ring->count = ALIGN(rx_ring->count, IXGB_REQ_RX_DESCRIPTOR_MULTIPLE); + } + { /* Receive Checksum Offload Enable */ + static const struct ixgb_option opt = { + .type = enable_option, + .name = "Receive Checksum Offload", + .err = "defaulting to Enabled", + .def = OPTION_ENABLED + }; + + if (num_XsumRX > bd) { + unsigned int rx_csum = XsumRX[bd]; + ixgb_validate_option(&rx_csum, &opt); + adapter->rx_csum = rx_csum; + } else { + adapter->rx_csum = opt.def; + } + } + { /* Flow Control */ + + static const struct ixgb_opt_list fc_list[] = { + { ixgb_fc_none, "Flow Control Disabled" }, + { ixgb_fc_rx_pause, "Flow Control Receive Only" }, + { ixgb_fc_tx_pause, "Flow Control Transmit Only" }, + { ixgb_fc_full, "Flow Control Enabled" }, + { ixgb_fc_default, "Flow Control Hardware Default" } + }; + + static const struct ixgb_option opt = { + .type = list_option, + .name = "Flow Control", + .err = "reading default settings from EEPROM", + .def = ixgb_fc_tx_pause, + .arg = { .l = { .nr = ARRAY_SIZE(fc_list), + .p = fc_list }} + }; + + if (num_FlowControl > bd) { + unsigned int fc = FlowControl[bd]; + ixgb_validate_option(&fc, &opt); + adapter->hw.fc.type = fc; + } else { + adapter->hw.fc.type = opt.def; + } + } + { /* Receive Flow Control High Threshold */ + static const struct ixgb_option opt = { + .type = range_option, + .name = "Rx Flow Control High Threshold", + .err = "using default of " __MODULE_STRING(DEFAULT_FCRTH), + .def = DEFAULT_FCRTH, + .arg = { .r = { .min = MIN_FCRTH, + .max = MAX_FCRTH}} + }; + + if (num_RxFCHighThresh > bd) { + adapter->hw.fc.high_water = RxFCHighThresh[bd]; + ixgb_validate_option(&adapter->hw.fc.high_water, &opt); + } else { + adapter->hw.fc.high_water = opt.def; + } + if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) ) + pr_info("Ignoring RxFCHighThresh when no RxFC\n"); + } + { /* Receive Flow Control Low Threshold */ + static const struct ixgb_option opt = { + .type = range_option, + .name = "Rx Flow Control Low Threshold", + .err = "using default of " __MODULE_STRING(DEFAULT_FCRTL), + .def = DEFAULT_FCRTL, + .arg = { .r = { .min = MIN_FCRTL, + .max = MAX_FCRTL}} + }; + + if (num_RxFCLowThresh > bd) { + adapter->hw.fc.low_water = RxFCLowThresh[bd]; + ixgb_validate_option(&adapter->hw.fc.low_water, &opt); + } else { + adapter->hw.fc.low_water = opt.def; + } + if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) ) + pr_info("Ignoring RxFCLowThresh when no RxFC\n"); + } + { /* Flow Control Pause Time Request*/ + static const struct ixgb_option opt = { + .type = range_option, + .name = "Flow Control Pause Time Request", + .err = "using default of "__MODULE_STRING(DEFAULT_FCPAUSE), + .def = DEFAULT_FCPAUSE, + .arg = { .r = { .min = MIN_FCPAUSE, + .max = MAX_FCPAUSE}} + }; + + if (num_FCReqTimeout > bd) { + unsigned int pause_time = FCReqTimeout[bd]; + ixgb_validate_option(&pause_time, &opt); + adapter->hw.fc.pause_time = pause_time; + } else { + adapter->hw.fc.pause_time = opt.def; + } + if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) ) + pr_info("Ignoring FCReqTimeout when no RxFC\n"); + } + /* high low and spacing check for rx flow control thresholds */ + if (adapter->hw.fc.type & ixgb_fc_tx_pause) { + /* high must be greater than low */ + if (adapter->hw.fc.high_water < (adapter->hw.fc.low_water + 8)) { + /* set defaults */ + pr_info("RxFCHighThresh must be >= (RxFCLowThresh + 8), Using Defaults\n"); + adapter->hw.fc.high_water = DEFAULT_FCRTH; + adapter->hw.fc.low_water = DEFAULT_FCRTL; + } + } + { /* Receive Interrupt Delay */ + static const struct ixgb_option opt = { + .type = range_option, + .name = "Receive Interrupt Delay", + .err = "using default of " __MODULE_STRING(DEFAULT_RDTR), + .def = DEFAULT_RDTR, + .arg = { .r = { .min = MIN_RDTR, + .max = MAX_RDTR}} + }; + + if (num_RxIntDelay > bd) { + adapter->rx_int_delay = RxIntDelay[bd]; + ixgb_validate_option(&adapter->rx_int_delay, &opt); + } else { + adapter->rx_int_delay = opt.def; + } + } + { /* Transmit Interrupt Delay */ + static const struct ixgb_option opt = { + .type = range_option, + .name = "Transmit Interrupt Delay", + .err = "using default of " __MODULE_STRING(DEFAULT_TIDV), + .def = DEFAULT_TIDV, + .arg = { .r = { .min = MIN_TIDV, + .max = MAX_TIDV}} + }; + + if (num_TxIntDelay > bd) { + adapter->tx_int_delay = TxIntDelay[bd]; + ixgb_validate_option(&adapter->tx_int_delay, &opt); + } else { + adapter->tx_int_delay = opt.def; + } + } + + { /* Transmit Interrupt Delay Enable */ + static const struct ixgb_option opt = { + .type = enable_option, + .name = "Tx Interrupt Delay Enable", + .err = "defaulting to Enabled", + .def = OPTION_ENABLED + }; + + if (num_IntDelayEnable > bd) { + unsigned int ide = IntDelayEnable[bd]; + ixgb_validate_option(&ide, &opt); + adapter->tx_int_delay_enable = ide; + } else { + adapter->tx_int_delay_enable = opt.def; + } + } +} |