528 lines
13 KiB
C
528 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 1999 - 2018 Intel Corporation. */
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#include <linux/netdevice.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include "e1000.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 E1000_MAX_NIC 32
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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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#define COPYBREAK_DEFAULT 256
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unsigned int copybreak = COPYBREAK_DEFAULT;
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module_param(copybreak, uint, 0644);
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MODULE_PARM_DESC(copybreak,
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"Maximum size of packet that is copied to a new buffer on receive");
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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 E1000_PARAM_INIT { [0 ... E1000_MAX_NIC] = OPTION_UNSET }
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#define E1000_PARAM(X, desc) \
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static int X[E1000_MAX_NIC+1] = E1000_PARAM_INIT; \
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static unsigned int num_##X; \
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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 Interrupt Delay in units of 1.024 microseconds
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* Tx interrupt delay needs to typically be set to something non-zero
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*
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* Valid Range: 0-65535
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*/
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E1000_PARAM(TxIntDelay, "Transmit Interrupt Delay");
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#define DEFAULT_TIDV 8
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#define MAX_TXDELAY 0xFFFF
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#define MIN_TXDELAY 0
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/* Transmit Absolute Interrupt Delay in units of 1.024 microseconds
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*
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* Valid Range: 0-65535
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*/
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E1000_PARAM(TxAbsIntDelay, "Transmit Absolute Interrupt Delay");
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#define DEFAULT_TADV 32
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#define MAX_TXABSDELAY 0xFFFF
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#define MIN_TXABSDELAY 0
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/* Receive Interrupt Delay in units of 1.024 microseconds
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* hardware will likely hang if you set this to anything but zero.
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*
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* Burst variant is used as default if device has FLAG2_DMA_BURST.
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*
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* Valid Range: 0-65535
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*/
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E1000_PARAM(RxIntDelay, "Receive Interrupt Delay");
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#define DEFAULT_RDTR 0
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#define BURST_RDTR 0x20
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#define MAX_RXDELAY 0xFFFF
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#define MIN_RXDELAY 0
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/* Receive Absolute Interrupt Delay in units of 1.024 microseconds
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*
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* Burst variant is used as default if device has FLAG2_DMA_BURST.
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*
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* Valid Range: 0-65535
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*/
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E1000_PARAM(RxAbsIntDelay, "Receive Absolute Interrupt Delay");
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#define DEFAULT_RADV 8
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#define BURST_RADV 0x20
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#define MAX_RXABSDELAY 0xFFFF
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#define MIN_RXABSDELAY 0
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/* Interrupt Throttle Rate (interrupts/sec)
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*
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* Valid Range: 100-100000 or one of: 0=off, 1=dynamic, 3=dynamic conservative
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*/
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E1000_PARAM(InterruptThrottleRate, "Interrupt Throttling Rate");
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#define DEFAULT_ITR 3
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#define MAX_ITR 100000
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#define MIN_ITR 100
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/* IntMode (Interrupt Mode)
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*
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* Valid Range: varies depending on kernel configuration & hardware support
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*
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* legacy=0, MSI=1, MSI-X=2
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*
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* When MSI/MSI-X support is enabled in kernel-
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* Default Value: 2 (MSI-X) when supported by hardware, 1 (MSI) otherwise
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* When MSI/MSI-X support is not enabled in kernel-
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* Default Value: 0 (legacy)
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*
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* When a mode is specified that is not allowed/supported, it will be
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* demoted to the most advanced interrupt mode available.
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*/
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E1000_PARAM(IntMode, "Interrupt Mode");
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/* Enable Smart Power Down of the PHY
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*
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* Valid Range: 0, 1
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*
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* Default Value: 0 (disabled)
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*/
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E1000_PARAM(SmartPowerDownEnable, "Enable PHY smart power down");
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/* Enable Kumeran Lock Loss workaround
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*
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* Valid Range: 0, 1
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*
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* Default Value: 1 (enabled)
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*/
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E1000_PARAM(KumeranLockLoss, "Enable Kumeran lock loss workaround");
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/* Write Protect NVM
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*
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* Valid Range: 0, 1
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*
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* Default Value: 1 (enabled)
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*/
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E1000_PARAM(WriteProtectNVM,
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"Write-protect NVM [WARNING: disabling this can lead to corrupted NVM]");
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/* Enable CRC Stripping
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*
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* Valid Range: 0, 1
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*
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* Default Value: 1 (enabled)
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*/
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E1000_PARAM(CrcStripping,
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"Enable CRC Stripping, disable if your BMC needs the CRC");
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struct e1000_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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/* range_option info */
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struct {
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int min;
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int max;
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} r;
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/* list_option info */
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struct {
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int nr;
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struct e1000_opt_list {
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int i;
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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 e1000_validate_option(unsigned int *value,
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const struct e1000_option *opt,
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struct e1000_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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dev_info(&adapter->pdev->dev, "%s Enabled\n",
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opt->name);
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return 0;
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case OPTION_DISABLED:
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dev_info(&adapter->pdev->dev, "%s Disabled\n",
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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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dev_info(&adapter->pdev->dev, "%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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struct e1000_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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dev_info(&adapter->pdev->dev, "%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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dev_info(&adapter->pdev->dev, "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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* e1000e_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 e1000e_check_options(struct e1000_adapter *adapter)
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{
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struct e1000_hw *hw = &adapter->hw;
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int bd = adapter->bd_number;
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if (bd >= E1000_MAX_NIC) {
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dev_notice(&adapter->pdev->dev,
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"Warning: no configuration for board #%i\n", bd);
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dev_notice(&adapter->pdev->dev,
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"Using defaults for all values\n");
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}
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/* Transmit Interrupt Delay */
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{
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static const struct e1000_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 "
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__MODULE_STRING(DEFAULT_TIDV),
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.def = DEFAULT_TIDV,
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.arg = { .r = { .min = MIN_TXDELAY,
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.max = MAX_TXDELAY } }
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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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e1000_validate_option(&adapter->tx_int_delay, &opt,
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adapter);
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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 Absolute Interrupt Delay */
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{
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static const struct e1000_option opt = {
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.type = range_option,
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.name = "Transmit Absolute Interrupt Delay",
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.err = "using default of "
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__MODULE_STRING(DEFAULT_TADV),
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.def = DEFAULT_TADV,
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.arg = { .r = { .min = MIN_TXABSDELAY,
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.max = MAX_TXABSDELAY } }
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};
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if (num_TxAbsIntDelay > bd) {
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adapter->tx_abs_int_delay = TxAbsIntDelay[bd];
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e1000_validate_option(&adapter->tx_abs_int_delay, &opt,
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adapter);
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} else {
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adapter->tx_abs_int_delay = opt.def;
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}
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}
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/* Receive Interrupt Delay */
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{
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static struct e1000_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 "
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__MODULE_STRING(DEFAULT_RDTR),
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.def = DEFAULT_RDTR,
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.arg = { .r = { .min = MIN_RXDELAY,
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.max = MAX_RXDELAY } }
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};
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if (adapter->flags2 & FLAG2_DMA_BURST)
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opt.def = BURST_RDTR;
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if (num_RxIntDelay > bd) {
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adapter->rx_int_delay = RxIntDelay[bd];
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e1000_validate_option(&adapter->rx_int_delay, &opt,
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adapter);
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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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/* Receive Absolute Interrupt Delay */
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{
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static struct e1000_option opt = {
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.type = range_option,
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.name = "Receive Absolute Interrupt Delay",
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.err = "using default of "
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__MODULE_STRING(DEFAULT_RADV),
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.def = DEFAULT_RADV,
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.arg = { .r = { .min = MIN_RXABSDELAY,
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.max = MAX_RXABSDELAY } }
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};
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if (adapter->flags2 & FLAG2_DMA_BURST)
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opt.def = BURST_RADV;
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if (num_RxAbsIntDelay > bd) {
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adapter->rx_abs_int_delay = RxAbsIntDelay[bd];
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e1000_validate_option(&adapter->rx_abs_int_delay, &opt,
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adapter);
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} else {
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adapter->rx_abs_int_delay = opt.def;
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}
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}
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/* Interrupt Throttling Rate */
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{
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static const struct e1000_option opt = {
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.type = range_option,
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.name = "Interrupt Throttling Rate (ints/sec)",
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.err = "using default of "
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__MODULE_STRING(DEFAULT_ITR),
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.def = DEFAULT_ITR,
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.arg = { .r = { .min = MIN_ITR,
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.max = MAX_ITR } }
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};
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if (num_InterruptThrottleRate > bd) {
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adapter->itr = InterruptThrottleRate[bd];
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/* Make sure a message is printed for non-special
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* values. And in case of an invalid option, display
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* warning, use default and go through itr/itr_setting
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* adjustment logic below
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*/
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if ((adapter->itr > 4) &&
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e1000_validate_option(&adapter->itr, &opt, adapter))
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adapter->itr = opt.def;
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} else {
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/* If no option specified, use default value and go
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* through the logic below to adjust itr/itr_setting
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*/
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adapter->itr = opt.def;
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/* Make sure a message is printed for non-special
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* default values
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*/
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if (adapter->itr > 4)
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dev_info(&adapter->pdev->dev,
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"%s set to default %d\n", opt.name,
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adapter->itr);
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}
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adapter->itr_setting = adapter->itr;
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switch (adapter->itr) {
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case 0:
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dev_info(&adapter->pdev->dev, "%s turned off\n",
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opt.name);
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break;
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case 1:
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dev_info(&adapter->pdev->dev,
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"%s set to dynamic mode\n", opt.name);
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adapter->itr = 20000;
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break;
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case 2:
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dev_info(&adapter->pdev->dev,
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"%s Invalid mode - setting default\n",
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opt.name);
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adapter->itr_setting = opt.def;
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fallthrough;
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case 3:
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dev_info(&adapter->pdev->dev,
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"%s set to dynamic conservative mode\n",
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opt.name);
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adapter->itr = 20000;
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break;
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case 4:
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dev_info(&adapter->pdev->dev,
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"%s set to simplified (2000-8000 ints) mode\n",
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opt.name);
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break;
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default:
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/* Save the setting, because the dynamic bits
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* change itr.
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*
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* Clear the lower two bits because
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* they are used as control.
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*/
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adapter->itr_setting &= ~3;
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break;
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}
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}
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/* Interrupt Mode */
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{
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static struct e1000_option opt = {
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.type = range_option,
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.name = "Interrupt Mode",
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#ifndef CONFIG_PCI_MSI
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.err = "defaulting to 0 (legacy)",
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.def = E1000E_INT_MODE_LEGACY,
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.arg = { .r = { .min = 0,
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.max = 0 } }
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#endif
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};
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#ifdef CONFIG_PCI_MSI
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if (adapter->flags & FLAG_HAS_MSIX) {
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opt.err = kstrdup("defaulting to 2 (MSI-X)",
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GFP_KERNEL);
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opt.def = E1000E_INT_MODE_MSIX;
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opt.arg.r.max = E1000E_INT_MODE_MSIX;
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} else {
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opt.err = kstrdup("defaulting to 1 (MSI)", GFP_KERNEL);
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opt.def = E1000E_INT_MODE_MSI;
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opt.arg.r.max = E1000E_INT_MODE_MSI;
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}
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if (!opt.err) {
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dev_err(&adapter->pdev->dev,
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"Failed to allocate memory\n");
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return;
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}
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#endif
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if (num_IntMode > bd) {
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unsigned int int_mode = IntMode[bd];
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e1000_validate_option(&int_mode, &opt, adapter);
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adapter->int_mode = int_mode;
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} else {
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adapter->int_mode = opt.def;
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}
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#ifdef CONFIG_PCI_MSI
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kfree(opt.err);
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#endif
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}
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/* Smart Power Down */
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{
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static const struct e1000_option opt = {
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.type = enable_option,
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.name = "PHY Smart Power Down",
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.err = "defaulting to Disabled",
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.def = OPTION_DISABLED
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};
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if (num_SmartPowerDownEnable > bd) {
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unsigned int spd = SmartPowerDownEnable[bd];
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e1000_validate_option(&spd, &opt, adapter);
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if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) && spd)
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adapter->flags |= FLAG_SMART_POWER_DOWN;
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}
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}
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/* CRC Stripping */
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{
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static const struct e1000_option opt = {
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.type = enable_option,
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.name = "CRC Stripping",
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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_CrcStripping > bd) {
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unsigned int crc_stripping = CrcStripping[bd];
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e1000_validate_option(&crc_stripping, &opt, adapter);
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if (crc_stripping == OPTION_ENABLED) {
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adapter->flags2 |= FLAG2_CRC_STRIPPING;
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adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
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}
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} else {
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adapter->flags2 |= FLAG2_CRC_STRIPPING;
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adapter->flags2 |= FLAG2_DFLT_CRC_STRIPPING;
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}
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}
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/* Kumeran Lock Loss Workaround */
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{
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static const struct e1000_option opt = {
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.type = enable_option,
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.name = "Kumeran Lock Loss Workaround",
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.err = "defaulting to Enabled",
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.def = OPTION_ENABLED
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};
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bool enabled = opt.def;
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if (num_KumeranLockLoss > bd) {
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unsigned int kmrn_lock_loss = KumeranLockLoss[bd];
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e1000_validate_option(&kmrn_lock_loss, &opt, adapter);
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enabled = kmrn_lock_loss;
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}
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if (hw->mac.type == e1000_ich8lan)
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e1000e_set_kmrn_lock_loss_workaround_ich8lan(hw,
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enabled);
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}
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/* Write-protect NVM */
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{
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static const struct e1000_option opt = {
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.type = enable_option,
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.name = "Write-protect NVM",
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.err = "defaulting to Enabled",
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.def = OPTION_ENABLED
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};
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if (adapter->flags & FLAG_IS_ICH) {
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if (num_WriteProtectNVM > bd) {
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unsigned int write_protect_nvm =
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WriteProtectNVM[bd];
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e1000_validate_option(&write_protect_nvm, &opt,
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adapter);
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if (write_protect_nvm)
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adapter->flags |= FLAG_READ_ONLY_NVM;
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} else {
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if (opt.def)
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adapter->flags |= FLAG_READ_ONLY_NVM;
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}
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}
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}
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}
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