443 lines
11 KiB
C
443 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 1999 - 2008 Intel Corporation. */
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include "ixgb.h"
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/* This is the only thing that needs to be changed to adjust the
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* maximum number of ports that the driver can manage.
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*/
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#define IXGB_MAX_NIC 8
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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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/* All parameters are treated the same, as an integer array of values.
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* This macro just reduces the need to repeat the same declaration code
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* over and over (plus this helps to avoid typo bugs).
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*/
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#define IXGB_PARAM_INIT { [0 ... IXGB_MAX_NIC] = OPTION_UNSET }
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#define IXGB_PARAM(X, desc) \
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static int X[IXGB_MAX_NIC+1] \
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= IXGB_PARAM_INIT; \
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static unsigned int num_##X = 0; \
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module_param_array_named(X, X, int, &num_##X, 0); \
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MODULE_PARM_DESC(X, desc);
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/* Transmit Descriptor Count
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*
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* Valid Range: 64-4096
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*
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* Default Value: 256
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*/
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IXGB_PARAM(TxDescriptors, "Number of transmit descriptors");
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/* Receive Descriptor Count
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*
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* Valid Range: 64-4096
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*
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* Default Value: 1024
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*/
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IXGB_PARAM(RxDescriptors, "Number of receive descriptors");
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/* User Specified Flow Control Override
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*
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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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*
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* Default Value: 2 - Tx only (silicon bug avoidance)
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*/
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IXGB_PARAM(FlowControl, "Flow Control setting");
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/* XsumRX - Receive Checksum Offload Enable/Disable
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*
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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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* on 82597 based NICs
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*
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* Default Value: 1
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*/
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IXGB_PARAM(XsumRX, "Disable or enable Receive Checksum offload");
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/* Transmit Interrupt Delay in units of 0.8192 microseconds
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*
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* Valid Range: 0-65535
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*
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* Default Value: 32
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*/
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IXGB_PARAM(TxIntDelay, "Transmit Interrupt Delay");
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/* Receive Interrupt Delay in units of 0.8192 microseconds
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*
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* Valid Range: 0-65535
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*
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* Default Value: 72
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*/
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IXGB_PARAM(RxIntDelay, "Receive Interrupt Delay");
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/* Receive Flow control high threshold (when we send a pause frame)
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* (FCRTH)
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*
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* Valid Range: 1,536 - 262,136 (0x600 - 0x3FFF8, 8 byte granularity)
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*
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* Default Value: 196,608 (0x30000)
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*/
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IXGB_PARAM(RxFCHighThresh, "Receive Flow Control High Threshold");
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/* Receive Flow control low threshold (when we send a resume frame)
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* (FCRTL)
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*
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* Valid Range: 64 - 262,136 (0x40 - 0x3FFF8, 8 byte granularity)
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* must be less than high threshold by at least 8 bytes
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*
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* Default Value: 163,840 (0x28000)
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*/
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IXGB_PARAM(RxFCLowThresh, "Receive Flow Control Low Threshold");
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/* Flow control request timeout (how long to pause the link partner's tx)
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* (PAP 15:0)
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*
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* Valid Range: 1 - 65535
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*
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* Default Value: 65535 (0xffff) (we'll send an xon if we recover)
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*/
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IXGB_PARAM(FCReqTimeout, "Flow Control Request Timeout");
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/* Interrupt Delay Enable
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*
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* Valid Range: 0, 1
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*
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* - 0 - disables transmit interrupt delay
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* - 1 - enables transmmit interrupt delay
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*
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* Default Value: 1
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*/
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IXGB_PARAM(IntDelayEnable, "Transmit Interrupt Delay Enable");
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#define DEFAULT_TIDV 32
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#define MAX_TIDV 0xFFFF
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#define MIN_TIDV 0
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#define DEFAULT_RDTR 72
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#define MAX_RDTR 0xFFFF
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#define MIN_RDTR 0
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#define DEFAULT_FCRTL 0x28000
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#define DEFAULT_FCRTH 0x30000
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#define MIN_FCRTL 0
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#define MAX_FCRTL 0x3FFE8
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#define MIN_FCRTH 8
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#define MAX_FCRTH 0x3FFF0
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#define MIN_FCPAUSE 1
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#define MAX_FCPAUSE 0xffff
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#define DEFAULT_FCPAUSE 0xFFFF /* this may be too long */
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struct ixgb_option {
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enum { enable_option, range_option, list_option } type;
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const char *name;
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const 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 ixgb_opt_list {
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int i;
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const char *str;
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} *p;
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} l;
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} arg;
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};
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static int
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ixgb_validate_option(unsigned int *value, const struct ixgb_option *opt)
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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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pr_info("%s Enabled\n", opt->name);
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return 0;
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case OPTION_DISABLED:
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pr_info("%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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pr_info("%s set to %i\n", 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 ixgb_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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pr_info("%s\n", 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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pr_info("Invalid %s specified (%i) %s\n", 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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* ixgb_check_options - Range Checking for Command Line Parameters
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* @adapter: board private structure
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*
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* This routine checks all command line parameters for valid user
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* input. If an invalid value is given, or if no user specified
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* value exists, a default value is used. The final value is stored
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* in a variable in the adapter structure.
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**/
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void
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ixgb_check_options(struct ixgb_adapter *adapter)
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{
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int bd = adapter->bd_number;
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if (bd >= IXGB_MAX_NIC) {
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pr_notice("Warning: no configuration for board #%i\n", bd);
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pr_notice("Using defaults for all values\n");
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}
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{ /* Transmit Descriptor Count */
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static const struct ixgb_option opt = {
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.type = range_option,
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.name = "Transmit Descriptors",
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.err = "using default of " __MODULE_STRING(DEFAULT_TXD),
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.def = DEFAULT_TXD,
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.arg = { .r = { .min = MIN_TXD,
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.max = MAX_TXD}}
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};
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struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
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if (num_TxDescriptors > bd) {
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tx_ring->count = TxDescriptors[bd];
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ixgb_validate_option(&tx_ring->count, &opt);
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} else {
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tx_ring->count = opt.def;
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}
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tx_ring->count = ALIGN(tx_ring->count, IXGB_REQ_TX_DESCRIPTOR_MULTIPLE);
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}
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{ /* Receive Descriptor Count */
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static const struct ixgb_option opt = {
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.type = range_option,
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.name = "Receive Descriptors",
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.err = "using default of " __MODULE_STRING(DEFAULT_RXD),
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.def = DEFAULT_RXD,
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.arg = { .r = { .min = MIN_RXD,
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.max = MAX_RXD}}
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};
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struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
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if (num_RxDescriptors > bd) {
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rx_ring->count = RxDescriptors[bd];
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ixgb_validate_option(&rx_ring->count, &opt);
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} else {
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rx_ring->count = opt.def;
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}
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rx_ring->count = ALIGN(rx_ring->count, IXGB_REQ_RX_DESCRIPTOR_MULTIPLE);
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}
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{ /* Receive Checksum Offload Enable */
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static const struct ixgb_option opt = {
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.type = enable_option,
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.name = "Receive Checksum Offload",
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.err = "defaulting to Enabled",
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.def = OPTION_ENABLED
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};
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if (num_XsumRX > bd) {
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unsigned int rx_csum = XsumRX[bd];
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ixgb_validate_option(&rx_csum, &opt);
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adapter->rx_csum = rx_csum;
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} else {
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adapter->rx_csum = opt.def;
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}
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}
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{ /* Flow Control */
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static const struct ixgb_opt_list fc_list[] = {
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{ ixgb_fc_none, "Flow Control Disabled" },
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{ ixgb_fc_rx_pause, "Flow Control Receive Only" },
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{ ixgb_fc_tx_pause, "Flow Control Transmit Only" },
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{ ixgb_fc_full, "Flow Control Enabled" },
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{ ixgb_fc_default, "Flow Control Hardware Default" }
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};
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static const struct ixgb_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 = ixgb_fc_tx_pause,
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.arg = { .l = { .nr = ARRAY_SIZE(fc_list),
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.p = fc_list }}
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};
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if (num_FlowControl > bd) {
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unsigned int fc = FlowControl[bd];
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ixgb_validate_option(&fc, &opt);
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adapter->hw.fc.type = fc;
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} else {
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adapter->hw.fc.type = opt.def;
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}
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}
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{ /* Receive Flow Control High Threshold */
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static const struct ixgb_option opt = {
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.type = range_option,
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.name = "Rx Flow Control High Threshold",
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.err = "using default of " __MODULE_STRING(DEFAULT_FCRTH),
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.def = DEFAULT_FCRTH,
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.arg = { .r = { .min = MIN_FCRTH,
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.max = MAX_FCRTH}}
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};
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if (num_RxFCHighThresh > bd) {
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adapter->hw.fc.high_water = RxFCHighThresh[bd];
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ixgb_validate_option(&adapter->hw.fc.high_water, &opt);
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} else {
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adapter->hw.fc.high_water = opt.def;
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}
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if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
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pr_info("Ignoring RxFCHighThresh when no RxFC\n");
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}
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{ /* Receive Flow Control Low Threshold */
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static const struct ixgb_option opt = {
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.type = range_option,
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.name = "Rx Flow Control Low Threshold",
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.err = "using default of " __MODULE_STRING(DEFAULT_FCRTL),
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.def = DEFAULT_FCRTL,
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.arg = { .r = { .min = MIN_FCRTL,
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.max = MAX_FCRTL}}
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};
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if (num_RxFCLowThresh > bd) {
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adapter->hw.fc.low_water = RxFCLowThresh[bd];
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ixgb_validate_option(&adapter->hw.fc.low_water, &opt);
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} else {
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adapter->hw.fc.low_water = opt.def;
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}
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if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
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pr_info("Ignoring RxFCLowThresh when no RxFC\n");
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}
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{ /* Flow Control Pause Time Request*/
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static const struct ixgb_option opt = {
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.type = range_option,
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.name = "Flow Control Pause Time Request",
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.err = "using default of "__MODULE_STRING(DEFAULT_FCPAUSE),
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.def = DEFAULT_FCPAUSE,
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.arg = { .r = { .min = MIN_FCPAUSE,
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.max = MAX_FCPAUSE}}
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};
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if (num_FCReqTimeout > bd) {
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unsigned int pause_time = FCReqTimeout[bd];
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ixgb_validate_option(&pause_time, &opt);
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adapter->hw.fc.pause_time = pause_time;
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} else {
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adapter->hw.fc.pause_time = opt.def;
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}
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if (!(adapter->hw.fc.type & ixgb_fc_tx_pause) )
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pr_info("Ignoring FCReqTimeout when no RxFC\n");
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}
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/* high low and spacing check for rx flow control thresholds */
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if (adapter->hw.fc.type & ixgb_fc_tx_pause) {
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/* high must be greater than low */
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if (adapter->hw.fc.high_water < (adapter->hw.fc.low_water + 8)) {
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/* set defaults */
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pr_info("RxFCHighThresh must be >= (RxFCLowThresh + 8), Using Defaults\n");
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adapter->hw.fc.high_water = DEFAULT_FCRTH;
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adapter->hw.fc.low_water = DEFAULT_FCRTL;
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}
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}
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{ /* Receive Interrupt Delay */
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static const struct ixgb_option opt = {
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.type = range_option,
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.name = "Receive Interrupt Delay",
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.err = "using default of " __MODULE_STRING(DEFAULT_RDTR),
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.def = DEFAULT_RDTR,
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.arg = { .r = { .min = MIN_RDTR,
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.max = MAX_RDTR}}
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};
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if (num_RxIntDelay > bd) {
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adapter->rx_int_delay = RxIntDelay[bd];
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ixgb_validate_option(&adapter->rx_int_delay, &opt);
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} else {
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adapter->rx_int_delay = opt.def;
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}
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}
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{ /* Transmit Interrupt Delay */
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static const struct ixgb_option opt = {
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.type = range_option,
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.name = "Transmit Interrupt Delay",
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.err = "using default of " __MODULE_STRING(DEFAULT_TIDV),
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.def = DEFAULT_TIDV,
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.arg = { .r = { .min = MIN_TIDV,
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.max = MAX_TIDV}}
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};
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if (num_TxIntDelay > bd) {
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adapter->tx_int_delay = TxIntDelay[bd];
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ixgb_validate_option(&adapter->tx_int_delay, &opt);
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} else {
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adapter->tx_int_delay = opt.def;
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}
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}
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{ /* Transmit Interrupt Delay Enable */
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static const struct ixgb_option opt = {
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.type = enable_option,
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.name = "Tx Interrupt Delay Enable",
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.err = "defaulting to Enabled",
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.def = OPTION_ENABLED
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};
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if (num_IntDelayEnable > bd) {
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unsigned int ide = IntDelayEnable[bd];
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ixgb_validate_option(&ide, &opt);
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adapter->tx_int_delay_enable = ide;
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} else {
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adapter->tx_int_delay_enable = opt.def;
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}
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}
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}
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