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Commit 2a017ea0 authored by Alan Cox's avatar Alan Cox Committed by David Woodhouse
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[PATCH] Remove i2o-lan 

There are no known cards outside of labs that used i2o_lan. The only
exception is the Redcreek VPN, which has its own driver anyway. Note
i2o_lan.h is left as i2o_config can still understand i2o_lan devices
such as the RedCreek.
parent 5eef51c3
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drivers/message/i2o/Kconfig
View file @ 2a017ea0
...@@ -50,19 +50,6 @@ config I2O_BLOCK ...@@ -50,19 +50,6 @@ config I2O_BLOCK
whenever you want). If you want to compile it as a module, say M whenever you want). If you want to compile it as a module, say M
here and read <file:Documentation/modules.txt>. here and read <file:Documentation/modules.txt>.
config I2O_LAN
tristate "I2O LAN OSM"
depends on NET && I2O
help
Include support for the LAN OSM. You will also need to include
support for token ring or FDDI if you wish to use token ring or FDDI
I2O cards with this driver.
This support is also available as a module called i2o_lan ( = code
which can be inserted in and removed from the running kernel
whenever you want). If you want to compile it as a module, say M
here and read <file:Documentation/modules.txt>.
config I2O_SCSI config I2O_SCSI
tristate "I2O SCSI OSM" tristate "I2O SCSI OSM"
depends on I2O && SCSI depends on I2O && SCSI
......
drivers/message/i2o/Makefile
View file @ 2a017ea0
...@@ -8,6 +8,5 @@ ...@@ -8,6 +8,5 @@
obj-$(CONFIG_I2O_PCI) += i2o_pci.o obj-$(CONFIG_I2O_PCI) += i2o_pci.o
obj-$(CONFIG_I2O) += i2o_core.o i2o_config.o obj-$(CONFIG_I2O) += i2o_core.o i2o_config.o
obj-$(CONFIG_I2O_BLOCK) += i2o_block.o obj-$(CONFIG_I2O_BLOCK) += i2o_block.o
obj-$(CONFIG_I2O_LAN) += i2o_lan.o
obj-$(CONFIG_I2O_SCSI) += i2o_scsi.o obj-$(CONFIG_I2O_SCSI) += i2o_scsi.o
obj-$(CONFIG_I2O_PROC) += i2o_proc.o obj-$(CONFIG_I2O_PROC) += i2o_proc.o
drivers/message/i2o/i2o_lan.c deleted 100644 → 0
View file @ 5eef51c3
/*
* drivers/i2o/i2o_lan.c
*
* I2O LAN CLASS OSM May 26th 2000
*
* (C) Copyright 1999, 2000 University of Helsinki,
* Department of Computer Science
*
* This code is still under development / test.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Auvo Hkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
* Fixes: Juha Sievnen <Juha.Sievanen@cs.Helsinki.FI>
* Taneli Vhkangas <Taneli.Vahakangas@cs.Helsinki.FI>
* Deepak Saxena <deepak@plexity.net>
*
* Tested: in FDDI environment (using SysKonnect's DDM)
* in Gigabit Eth environment (using SysKonnect's DDM)
* in Fast Ethernet environment (using Intel 82558 DDM)
*
* TODO: tests for other LAN classes (Token Ring, Fibre Channel)
*/
#error Please convert me to Documentation/DMA-mapping.txt
#include <linux/config.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/fddidevice.h>
#include <linux/trdevice.h>
#include <linux/fcdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <linux/i2o.h>
#include "i2o_lan.h"
//#define DRIVERDEBUG
#ifdef DRIVERDEBUG
#define dprintk(s, args...) printk(s, ## args)
#else
#define dprintk(s, args...)
#endif
/* The following module parameters are used as default values
* for per interface values located in the net_device private area.
* Private values are changed via /proc filesystem.
*/
static u32 max_buckets_out = I2O_LAN_MAX_BUCKETS_OUT;
static u32 bucket_thresh = I2O_LAN_BUCKET_THRESH;
static u32 rx_copybreak = I2O_LAN_RX_COPYBREAK;
static u8 tx_batch_mode = I2O_LAN_TX_BATCH_MODE;
static u32 i2o_event_mask = I2O_LAN_EVENT_MASK;
#define MAX_LAN_CARDS 16
static struct net_device *i2o_landevs[MAX_LAN_CARDS+1];
static int unit = -1; /* device unit number */
static void i2o_lan_reply(struct i2o_handler *h, struct i2o_controller *iop, struct i2o_message *m);
static void i2o_lan_send_post_reply(struct i2o_handler *h, struct i2o_controller *iop, struct i2o_message *m);
static int i2o_lan_receive_post(struct net_device *dev);
static void i2o_lan_receive_post_reply(struct i2o_handler *h, struct i2o_controller *iop, struct i2o_message *m);
static void i2o_lan_release_buckets(struct net_device *dev, u32 *msg);
static int i2o_lan_reset(struct net_device *dev);
static void i2o_lan_handle_event(struct net_device *dev, u32 *msg);
/* Structures to register handlers for the incoming replies. */
static struct i2o_handler i2o_lan_send_handler = {
i2o_lan_send_post_reply, // For send replies
NULL,
NULL,
NULL,
"I2O LAN OSM send",
-1,
I2O_CLASS_LAN
};
static int lan_send_context;
static struct i2o_handler i2o_lan_receive_handler = {
i2o_lan_receive_post_reply, // For receive replies
NULL,
NULL,
NULL,
"I2O LAN OSM receive",
-1,
I2O_CLASS_LAN
};
static int lan_receive_context;
static struct i2o_handler i2o_lan_handler = {
i2o_lan_reply, // For other replies
NULL,
NULL,
NULL,
"I2O LAN OSM",
-1,
I2O_CLASS_LAN
};
static int lan_context;
struct DECLARE_WORK(run_i2o_post_buckets_task,
(void (*)(void *)) run_task_queue, NULL);
/* Functions to handle message failures and transaction errors:
==============================================================*/
/*
* i2o_lan_handle_failure(): Fail bit has been set since IOP's message
* layer cannot deliver the request to the target, or the target cannot
* process the request.
*/
static void i2o_lan_handle_failure(struct net_device *dev, u32 *msg)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
u32 *preserved_msg = (u32*)(iop->mem_offset + msg[7]);
u32 *sgl_elem = &preserved_msg[4];
struct sk_buff *skb = NULL;
u8 le_flag;
i2o_report_status(KERN_INFO, dev->name, msg);
/* If PacketSend failed, free sk_buffs reserved by upper layers */
if (msg[1] >> 24 == LAN_PACKET_SEND) {
do {
skb = (struct sk_buff *)(sgl_elem[1]);
dev_kfree_skb_irq(skb);
atomic_dec(&priv->tx_out);
le_flag = *sgl_elem >> 31;
sgl_elem +=3;
} while (le_flag == 0); /* Last element flag not set */
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
}
/* If ReceivePost failed, free sk_buffs we have reserved */
if (msg[1] >> 24 == LAN_RECEIVE_POST) {
do {
skb = (struct sk_buff *)(sgl_elem[1]);
dev_kfree_skb_irq(skb);
atomic_dec(&priv->buckets_out);
le_flag = *sgl_elem >> 31;
sgl_elem +=3;
} while (le_flag == 0); /* Last element flag not set */
}
/* Release the preserved msg frame by resubmitting it as a NOP */
preserved_msg[0] = THREE_WORD_MSG_SIZE | SGL_OFFSET_0;
preserved_msg[1] = I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | 0;
preserved_msg[2] = 0;
i2o_post_message(iop, msg[7]);
}
/*
* i2o_lan_handle_transaction_error(): IOP or DDM has rejected the request
* for general cause (format error, bad function code, insufficient resources,
* etc.). We get one transaction_error for each failed transaction.
*/
static void i2o_lan_handle_transaction_error(struct net_device *dev, u32 *msg)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct sk_buff *skb;
i2o_report_status(KERN_INFO, dev->name, msg);
/* If PacketSend was rejected, free sk_buff reserved by upper layers */
if (msg[1] >> 24 == LAN_PACKET_SEND) {
skb = (struct sk_buff *)(msg[3]); // TransactionContext
dev_kfree_skb_irq(skb);
atomic_dec(&priv->tx_out);
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
}
/* If ReceivePost was rejected, free sk_buff we have reserved */
if (msg[1] >> 24 == LAN_RECEIVE_POST) {
skb = (struct sk_buff *)(msg[3]);
dev_kfree_skb_irq(skb);
atomic_dec(&priv->buckets_out);
}
}
/*
* i2o_lan_handle_status(): Common parts of handling a not succeeded request
* (status != SUCCESS).
*/
static int i2o_lan_handle_status(struct net_device *dev, u32 *msg)
{
/* Fail bit set? */
if (msg[0] & MSG_FAIL) {
i2o_lan_handle_failure(dev, msg);
return -1;
}
/* Message rejected for general cause? */
if ((msg[4]>>24) == I2O_REPLY_STATUS_TRANSACTION_ERROR) {
i2o_lan_handle_transaction_error(dev, msg);
return -1;
}
/* Else have to handle it in the callback function */
return 0;
}
/* Callback functions called from the interrupt routine:
=======================================================*/
/*
* i2o_lan_send_post_reply(): Callback function to handle PostSend replies.
*/
static void i2o_lan_send_post_reply(struct i2o_handler *h,
struct i2o_controller *iop, struct i2o_message *m)
{
u32 *msg = (u32 *)m;
u8 unit = (u8)(msg[2]>>16); // InitiatorContext
struct net_device *dev = i2o_landevs[unit];
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
u8 trl_count = msg[3] & 0x000000FF;
if ((msg[4] >> 24) != I2O_REPLY_STATUS_SUCCESS) {
if (i2o_lan_handle_status(dev, msg))
return;
}
#ifdef DRIVERDEBUG
i2o_report_status(KERN_INFO, dev->name, msg);
#endif
/* DDM has handled transmit request(s), free sk_buffs.
* We get similar single transaction reply also in error cases
* (except if msg failure or transaction error).
*/
while (trl_count) {
dev_kfree_skb_irq((struct sk_buff *)msg[4 + trl_count]);
dprintk(KERN_INFO "%s: tx skb freed (trl_count=%d).\n",
dev->name, trl_count);
atomic_dec(&priv->tx_out);
trl_count--;
}
/* If priv->tx_out had reached tx_max_out, the queue was stopped */
if (netif_queue_stopped(dev))
netif_wake_queue(dev);
}
/*
* i2o_lan_receive_post_reply(): Callback function to process incoming packets.
*/
static void i2o_lan_receive_post_reply(struct i2o_handler *h,
struct i2o_controller *iop, struct i2o_message *m)
{
u32 *msg = (u32 *)m;
u8 unit = (u8)(msg[2]>>16); // InitiatorContext
struct net_device *dev = i2o_landevs[unit];
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_bucket_descriptor *bucket = (struct i2o_bucket_descriptor *)&msg[6];
struct i2o_packet_info *packet;
u8 trl_count = msg[3] & 0x000000FF;
struct sk_buff *skb, *old_skb;
unsigned long flags = 0;
if ((msg[4] >> 24) != I2O_REPLY_STATUS_SUCCESS) {
if (i2o_lan_handle_status(dev, msg))
return;
i2o_lan_release_buckets(dev, msg);
return;
}
#ifdef DRIVERDEBUG
i2o_report_status(KERN_INFO, dev->name, msg);
#endif
/* Else we are receiving incoming post. */
while (trl_count--) {
skb = (struct sk_buff *)bucket->context;
packet = (struct i2o_packet_info *)bucket->packet_info;
atomic_dec(&priv->buckets_out);
/* Sanity checks: Any weird characteristics in bucket? */
if (packet->flags & 0x0f || ! packet->flags & 0x40) {
if (packet->flags & 0x01)
printk(KERN_WARNING "%s: packet with errors, error code=0x%02x.\n",
dev->name, packet->status & 0xff);
/* The following shouldn't happen, unless parameters in
* LAN_OPERATION group are changed during the run time.
*/
if (packet->flags & 0x0c)
printk(KERN_DEBUG "%s: multi-bucket packets not supported!\n",
dev->name);
if (! packet->flags & 0x40)
printk(KERN_DEBUG "%s: multiple packets in a bucket not supported!\n",
dev->name);
dev_kfree_skb_irq(skb);
bucket++;
continue;
}
/* Copy short packet to a new skb */
if (packet->len < priv->rx_copybreak) {
old_skb = skb;
skb = (struct sk_buff *)dev_alloc_skb(packet->len+2);
if (skb == NULL) {
printk(KERN_ERR "%s: Can't allocate skb.\n", dev->name);
return;
}
skb_reserve(skb, 2);
memcpy(skb_put(skb, packet->len), old_skb->data, packet->len);
spin_lock_irqsave(&priv->fbl_lock, flags);
if (priv->i2o_fbl_tail < I2O_LAN_MAX_BUCKETS_OUT)
priv->i2o_fbl[++priv->i2o_fbl_tail] = old_skb;
else
dev_kfree_skb_irq(old_skb);
spin_unlock_irqrestore(&priv->fbl_lock, flags);
} else
skb_put(skb, packet->len);
/* Deliver to upper layers */
skb->dev = dev;
skb->protocol = priv->type_trans(skb, dev);
netif_rx(skb);
dev->last_rx = jiffies;
dprintk(KERN_INFO "%s: Incoming packet (%d bytes) delivered "
"to upper level.\n", dev->name, packet->len);
bucket++; // to next Packet Descriptor Block
}
#ifdef DRIVERDEBUG
if (msg[5] == 0)
printk(KERN_INFO "%s: DDM out of buckets (priv->count = %d)!\n",
dev->name, atomic_read(&priv->buckets_out));
#endif
/* If DDM has already consumed bucket_thresh buckets, post new ones */
if (atomic_read(&priv->buckets_out) <= priv->max_buckets_out - priv->bucket_thresh) {
run_i2o_post_buckets_task.data = (void *)dev;
schedule_work(&run_i2o_post_buckets_task);
}
return;
}
/*
* i2o_lan_reply(): Callback function to handle other incoming messages
* except SendPost and ReceivePost.
*/
static void i2o_lan_reply(struct i2o_handler *h, struct i2o_controller *iop,
struct i2o_message *m)
{
u32 *msg = (u32 *)m;
u8 unit = (u8)(msg[2]>>16); // InitiatorContext
struct net_device *dev = i2o_landevs[unit];
if ((msg[4] >> 24) != I2O_REPLY_STATUS_SUCCESS) {
if (i2o_lan_handle_status(dev, msg))
return;
/* In other error cases just report and continue */
i2o_report_status(KERN_INFO, dev->name, msg);
}
#ifdef DRIVERDEBUG
i2o_report_status(KERN_INFO, dev->name, msg);
#endif
switch (msg[1] >> 24) {
case LAN_RESET:
case LAN_SUSPEND:
/* default reply without payload */
break;
case I2O_CMD_UTIL_EVT_REGISTER:
case I2O_CMD_UTIL_EVT_ACK:
i2o_lan_handle_event(dev, msg);
break;
case I2O_CMD_UTIL_PARAMS_SET:
/* default reply, results in ReplyPayload (not examined) */
switch (msg[3] >> 16) {
case 1: dprintk(KERN_INFO "%s: Reply to set MAC filter mask.\n",
dev->name);
break;
case 2: dprintk(KERN_INFO "%s: Reply to set MAC table.\n",
dev->name);
break;
default: printk(KERN_WARNING "%s: Bad group 0x%04X\n",
dev->name,msg[3] >> 16);
}
break;
default:
printk(KERN_ERR "%s: No handler for the reply.\n",
dev->name);
i2o_report_status(KERN_INFO, dev->name, msg);
}
}
/* Functions used by the above callback functions:
=================================================*/
/*
* i2o_lan_release_buckets(): Free unused buckets (sk_buffs).
*/
static void i2o_lan_release_buckets(struct net_device *dev, u32 *msg)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
u8 trl_elem_size = (u8)(msg[3]>>8 & 0x000000FF);
u8 trl_count = (u8)(msg[3] & 0x000000FF);
u32 *pskb = &msg[6];
while (trl_count--) {
dprintk(KERN_DEBUG "%s: Releasing unused rx skb %p (trl_count=%d).\n",
dev->name, (struct sk_buff*)(*pskb),trl_count+1);
dev_kfree_skb_irq((struct sk_buff *)(*pskb));
pskb += 1 + trl_elem_size;
atomic_dec(&priv->buckets_out);
}
}
/*
* i2o_lan_event_reply(): Handle events.
*/
static void i2o_lan_handle_event(struct net_device *dev, u32 *msg)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
u32 max_evt_data_size =iop->status_block->inbound_frame_size-5;
struct i2o_reply {
u32 header[4];
u32 evt_indicator;
u32 data[max_evt_data_size];
} *evt = (struct i2o_reply *)msg;
int evt_data_len = ((msg[0]>>16) - 5) * 4; /* real size*/
printk(KERN_INFO "%s: I2O event - ", dev->name);
if (msg[1]>>24 == I2O_CMD_UTIL_EVT_ACK) {
printk("Event acknowledgement reply.\n");
return;
}
/* Else evt->function == I2O_CMD_UTIL_EVT_REGISTER) */
switch (evt->evt_indicator) {
case I2O_EVT_IND_STATE_CHANGE: {
struct state_data {
u16 status;
u8 state;
u8 data;
} *evt_data = (struct state_data *)(evt->data[0]);
printk("State chance 0x%08x.\n", evt->data[0]);
/* If the DDM is in error state, recovery may be
* possible if status = Transmit or Receive Control
* Unit Inoperable.
*/
if (evt_data->state==0x05 && evt_data->status==0x0003)
i2o_lan_reset(dev);
break;
}
case I2O_EVT_IND_FIELD_MODIFIED: {
u16 *work16 = (u16 *)evt->data;
printk("Group 0x%04x, field %d changed.\n", work16[0], work16[1]);
break;
}
case I2O_EVT_IND_VENDOR_EVT: {
int i;
printk("Vendor event:\n");
for (i = 0; i < evt_data_len / 4; i++)
printk(" 0x%08x\n", evt->data[i]);
break;
}
case I2O_EVT_IND_DEVICE_RESET:
/* Spec 2.0 p. 6-121:
* The event of _DEVICE_RESET should also be responded
*/
printk("Device reset.\n");
if (i2o_event_ack(iop, msg) < 0)
printk("%s: Event Acknowledge timeout.\n", dev->name);
break;
#if 0
case I2O_EVT_IND_EVT_MASK_MODIFIED:
printk("Event mask modified, 0x%08x.\n", evt->data[0]);
break;
case I2O_EVT_IND_GENERAL_WARNING:
printk("General warning 0x%04x.\n", evt->data[0]);
break;
case I2O_EVT_IND_CONFIGURATION_FLAG:
printk("Configuration requested.\n");
break;
case I2O_EVT_IND_CAPABILITY_CHANGE:
printk("Capability change 0x%04x.\n", evt->data[0]);
break;
case I2O_EVT_IND_DEVICE_STATE:
printk("Device state changed 0x%08x.\n", evt->data[0]);
break;
#endif
case I2O_LAN_EVT_LINK_DOWN:
netif_carrier_off(dev);
printk("Link to the physical device is lost.\n");
break;
case I2O_LAN_EVT_LINK_UP:
netif_carrier_on(dev);
printk("Link to the physical device is (re)established.\n");
break;
case I2O_LAN_EVT_MEDIA_CHANGE:
printk("Media change.\n");
break;
default:
printk("0x%08x. No handler.\n", evt->evt_indicator);
}
}
/*
* i2o_lan_receive_post(): Post buckets to receive packets.
*/
static int i2o_lan_receive_post(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
struct sk_buff *skb;
u32 m, *msg;
u32 bucket_len = (dev->mtu + dev->hard_header_len);
u32 total = priv->max_buckets_out - atomic_read(&priv->buckets_out);
u32 bucket_count;
u32 *sgl_elem;
unsigned long flags;
/* Send (total/bucket_count) separate I2O requests */
while (total) {
m = I2O_POST_READ32(iop);
if (m == 0xFFFFFFFF)
return -ETIMEDOUT;
msg = (u32 *)(iop->mem_offset + m);
bucket_count = (total >= priv->sgl_max) ? priv->sgl_max : total;
total -= bucket_count;
atomic_add(bucket_count, &priv->buckets_out);
dprintk(KERN_INFO "%s: Sending %d buckets (size %d) to LAN DDM.\n",
dev->name, bucket_count, bucket_len);
/* Fill in the header */
__raw_writel(I2O_MESSAGE_SIZE(4 + 3 * bucket_count) | SGL_OFFSET_4, msg);
__raw_writel(LAN_RECEIVE_POST<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid, msg+1);
__raw_writel(priv->unit << 16 | lan_receive_context, msg+2);
__raw_writel(bucket_count, msg+3);
sgl_elem = &msg[4];
/* Fill in the payload - contains bucket_count SGL elements */
while (bucket_count--) {
spin_lock_irqsave(&priv->fbl_lock, flags);
if (priv->i2o_fbl_tail >= 0)
skb = priv->i2o_fbl[priv->i2o_fbl_tail--];
else {
skb = dev_alloc_skb(bucket_len + 2);
if (skb == NULL) {
spin_unlock_irqrestore(&priv->fbl_lock, flags);
return -ENOMEM;
}
skb_reserve(skb, 2);
}
spin_unlock_irqrestore(&priv->fbl_lock, flags);
__raw_writel(0x51000000 | bucket_len, sgl_elem);
__raw_writel((u32)skb, sgl_elem+1);
__raw_writel(virt_to_bus(skb->data), sgl_elem+2);
sgl_elem += 3;
}
/* set LE flag and post */
__raw_writel(__raw_readl(sgl_elem-3) | 0x80000000, (sgl_elem-3));
i2o_post_message(iop, m);
}
return 0;
}
/* Functions called from the network stack, and functions called by them:
========================================================================*/
/*
* i2o_lan_reset(): Reset the LAN adapter into the operational state and
* restore it to full operation.
*/
static int i2o_lan_reset(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
u32 msg[5];
dprintk(KERN_INFO "%s: LAN RESET MESSAGE.\n", dev->name);
msg[0] = FIVE_WORD_MSG_SIZE | SGL_OFFSET_0;
msg[1] = LAN_RESET<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid;
msg[2] = priv->unit << 16 | lan_context; // InitiatorContext
msg[3] = 0; // TransactionContext
msg[4] = 0; // Keep posted buckets
if (i2o_post_this(iop, msg, sizeof(msg)) < 0)
return -ETIMEDOUT;
return 0;
}
/*
* i2o_lan_suspend(): Put LAN adapter into a safe, non-active state.
* IOP replies to any LAN class message with status error_no_data_transfer
* / suspended.
*/
static int i2o_lan_suspend(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
u32 msg[5];
dprintk(KERN_INFO "%s: LAN SUSPEND MESSAGE.\n", dev->name);
msg[0] = FIVE_WORD_MSG_SIZE | SGL_OFFSET_0;
msg[1] = LAN_SUSPEND<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid;
msg[2] = priv->unit << 16 | lan_context; // InitiatorContext
msg[3] = 0; // TransactionContext
msg[4] = 1 << 16; // return posted buckets
if (i2o_post_this(iop, msg, sizeof(msg)) < 0)
return -ETIMEDOUT;
return 0;
}
/*
* i2o_set_ddm_parameters:
* These settings are done to ensure proper initial values for DDM.
* They can be changed via proc file system or vai configuration utility.
*/
static void i2o_set_ddm_parameters(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
u32 val;
/*
* When PacketOrphanlimit is set to the maximum packet length,
* the packets will never be split into two separate buckets
*/
val = dev->mtu + dev->hard_header_len;
if (i2o_set_scalar(iop, i2o_dev->lct_data.tid, 0x0004, 2, &val, sizeof(val)) < 0)
printk(KERN_WARNING "%s: Unable to set PacketOrphanLimit.\n",
dev->name);
else
dprintk(KERN_INFO "%s: PacketOrphanLimit set to %d.\n",
dev->name, val);
/* When RxMaxPacketsBucket = 1, DDM puts only one packet into bucket */
val = 1;
if (i2o_set_scalar(iop, i2o_dev->lct_data.tid, 0x0008, 4, &val, sizeof(val)) <0)
printk(KERN_WARNING "%s: Unable to set RxMaxPacketsBucket.\n",
dev->name);
else
dprintk(KERN_INFO "%s: RxMaxPacketsBucket set to %d.\n",
dev->name, val);
return;
}
/* Functions called from the network stack:
==========================================*/
/*
* i2o_lan_open(): Open the device to send/receive packets via
* the network device.
*/
static int i2o_lan_open(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
u32 mc_addr_group[64];
MOD_INC_USE_COUNT;
if (i2o_claim_device(i2o_dev, &i2o_lan_handler)) {
printk(KERN_WARNING "%s: Unable to claim the I2O LAN device.\n", dev->name);
MOD_DEC_USE_COUNT;
return -EAGAIN;
}
dprintk(KERN_INFO "%s: I2O LAN device (tid=%d) claimed by LAN OSM.\n",
dev->name, i2o_dev->lct_data.tid);
if (i2o_event_register(iop, i2o_dev->lct_data.tid,
priv->unit << 16 | lan_context, 0, priv->i2o_event_mask) < 0)
printk(KERN_WARNING "%s: Unable to set the event mask.\n", dev->name);
i2o_lan_reset(dev);
/* Get the max number of multicast addresses */
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0001, -1,
&mc_addr_group, sizeof(mc_addr_group)) < 0 ) {
printk(KERN_WARNING "%s: Unable to query LAN_MAC_ADDRESS group.\n", dev->name);
MOD_DEC_USE_COUNT;
return -EAGAIN;
}
priv->max_size_mc_table = mc_addr_group[8];
/* Malloc space for free bucket list to resuse reveive post buckets */
priv->i2o_fbl = kmalloc(priv->max_buckets_out * sizeof(struct sk_buff *),
GFP_KERNEL);
if (priv->i2o_fbl == NULL) {
MOD_DEC_USE_COUNT;
return -ENOMEM;
}
priv->i2o_fbl_tail = -1;
priv->send_active = 0;
i2o_set_ddm_parameters(dev);
i2o_lan_receive_post(dev);
netif_start_queue(dev);
return 0;
}
/*
* i2o_lan_close(): End the transfering.
*/
static int i2o_lan_close(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
int ret = 0;
netif_stop_queue(dev);
i2o_lan_suspend(dev);
if (i2o_event_register(iop, i2o_dev->lct_data.tid,
priv->unit << 16 | lan_context, 0, 0) < 0)
printk(KERN_WARNING "%s: Unable to clear the event mask.\n",
dev->name);
while (priv->i2o_fbl_tail >= 0)
dev_kfree_skb(priv->i2o_fbl[priv->i2o_fbl_tail--]);
kfree(priv->i2o_fbl);
if (i2o_release_device(i2o_dev, &i2o_lan_handler)) {
printk(KERN_WARNING "%s: Unable to unclaim I2O LAN device "
"(tid=%d).\n", dev->name, i2o_dev->lct_data.tid);
ret = -EBUSY;
}
MOD_DEC_USE_COUNT;
return ret;
}
/*
* i2o_lan_tx_timeout(): Tx timeout handler.
*/
static void i2o_lan_tx_timeout(struct net_device *dev)
{
if (!netif_queue_stopped(dev))
netif_start_queue(dev);
}
/*
* i2o_lan_batch_send(): Send packets in batch.
* Both i2o_lan_sdu_send and i2o_lan_packet_send use this.
*/
static void i2o_lan_batch_send(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_controller *iop = priv->i2o_dev->controller;
spin_lock_irq(&priv->tx_lock);
if (priv->tx_count != 0) {
dev->trans_start = jiffies;
i2o_post_message(iop, priv->m);
dprintk(KERN_DEBUG "%s: %d packets sent.\n", dev->name, priv->tx_count);
priv->tx_count = 0;
}
priv->send_active = 0;
spin_unlock_irq(&priv->tx_lock);
MOD_DEC_USE_COUNT;
}
#ifdef CONFIG_NET_FC
/*
* i2o_lan_sdu_send(): Send a packet, MAC header added by the DDM.
* Must be supported by Fibre Channel, optional for Ethernet/802.3,
* Token Ring, FDDI
*/
static int i2o_lan_sdu_send(struct sk_buff *skb, struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
int tickssofar = jiffies - dev->trans_start;
u32 m, *msg;
u32 *sgl_elem;
spin_lock_irq(&priv->tx_lock);
priv->tx_count++;
atomic_inc(&priv->tx_out);
/*
* If tx_batch_mode = 0x00 forced to immediate mode
* If tx_batch_mode = 0x01 forced to batch mode
* If tx_batch_mode = 0x10 switch automatically, current mode immediate
* If tx_batch_mode = 0x11 switch automatically, current mode batch
* If gap between two packets is > 0 ticks, switch to immediate
*/
if (priv->tx_batch_mode >> 1) // switch automatically
priv->tx_batch_mode = tickssofar ? 0x02 : 0x03;
if (priv->tx_count == 1) {
m = I2O_POST_READ32(iop);
if (m == 0xFFFFFFFF) {
spin_unlock_irq(&priv->tx_lock);
return 1;
}
msg = (u32 *)(iop->mem_offset + m);
priv->m = m;
__raw_writel(NINE_WORD_MSG_SIZE | 1<<12 | SGL_OFFSET_4, msg);
__raw_writel(LAN_PACKET_SEND<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid, msg+1);
__raw_writel(priv->unit << 16 | lan_send_context, msg+2); // InitiatorContext
__raw_writel(1 << 30 | 1 << 3, msg+3); // TransmitControlWord
__raw_writel(0xD7000000 | skb->len, msg+4); // MAC hdr included
__raw_writel((u32)skb, msg+5); // TransactionContext
__raw_writel(virt_to_bus(skb->data), msg+6);
__raw_writel((u32)skb->mac.raw, msg+7);
__raw_writel((u32)skb->mac.raw+4, msg+8);
if ((priv->tx_batch_mode & 0x01) && !priv->send_active) {
priv->send_active = 1;
MOD_INC_USE_COUNT;
if (schedule_work(&priv->i2o_batch_send_task) == 0)
MOD_DEC_USE_COUNT;
}
} else { /* Add new SGL element to the previous message frame */
msg = (u32 *)(iop->mem_offset + priv->m);
sgl_elem = &msg[priv->tx_count * 5 + 1];
__raw_writel(I2O_MESSAGE_SIZE((__raw_readl(msg)>>16) + 5) | 1<<12 | SGL_OFFSET_4, msg);
__raw_writel(__raw_readl(sgl_elem-5) & 0x7FFFFFFF, sgl_elem-5); /* clear LE flag */
__raw_writel(0xD5000000 | skb->len, sgl_elem);
__raw_writel((u32)skb, sgl_elem+1);
__raw_writel(virt_to_bus(skb->data), sgl_elem+2);
__raw_writel((u32)(skb->mac.raw), sgl_elem+3);
__raw_writel((u32)(skb->mac.raw)+1, sgl_elem+4);
}
/* If tx not in batch mode or frame is full, send immediatelly */
if (!(priv->tx_batch_mode & 0x01) || priv->tx_count == priv->sgl_max) {
dev->trans_start = jiffies;
i2o_post_message(iop, priv->m);
dprintk(KERN_DEBUG "%s: %d packets sent.\n", dev->name, priv->tx_count);
priv->tx_count = 0;
}
/* If DDMs TxMaxPktOut reached, stop queueing layer to send more */
if (atomic_read(&priv->tx_out) >= priv->tx_max_out)
netif_stop_queue(dev);
spin_unlock_irq(&priv->tx_lock);
return 0;
}
#endif /* CONFIG_NET_FC */
/*
* i2o_lan_packet_send(): Send a packet as is, including the MAC header.
*
* Must be supported by Ethernet/802.3, Token Ring, FDDI, optional for
* Fibre Channel
*/
static int i2o_lan_packet_send(struct sk_buff *skb, struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
int tickssofar = jiffies - dev->trans_start;
u32 m, *msg;
u32 *sgl_elem;
spin_lock_irq(&priv->tx_lock);
priv->tx_count++;
atomic_inc(&priv->tx_out);
/*
* If tx_batch_mode = 0x00 forced to immediate mode
* If tx_batch_mode = 0x01 forced to batch mode
* If tx_batch_mode = 0x10 switch automatically, current mode immediate
* If tx_batch_mode = 0x11 switch automatically, current mode batch
* If gap between two packets is > 0 ticks, switch to immediate
*/
if (priv->tx_batch_mode >> 1) // switch automatically
priv->tx_batch_mode = tickssofar ? 0x02 : 0x03;
if (priv->tx_count == 1) {
m = I2O_POST_READ32(iop);
if (m == 0xFFFFFFFF) {
spin_unlock_irq(&priv->tx_lock);
return 1;
}
msg = (u32 *)(iop->mem_offset + m);
priv->m = m;
__raw_writel(SEVEN_WORD_MSG_SIZE | 1<<12 | SGL_OFFSET_4, msg);
__raw_writel(LAN_PACKET_SEND<<24 | HOST_TID<<12 | i2o_dev->lct_data.tid, msg+1);
__raw_writel(priv->unit << 16 | lan_send_context, msg+2); // InitiatorContext
__raw_writel(1 << 30 | 1 << 3, msg+3); // TransmitControlWord
// bit 30: reply as soon as transmission attempt is complete
// bit 3: Suppress CRC generation
__raw_writel(0xD5000000 | skb->len, msg+4); // MAC hdr included
__raw_writel((u32)skb, msg+5); // TransactionContext
__raw_writel(virt_to_bus(skb->data), msg+6);
if ((priv->tx_batch_mode & 0x01) && !priv->send_active) {
priv->send_active = 1;
MOD_INC_USE_COUNT;
if (schedule_work(&priv->i2o_batch_send_task) == 0)
MOD_DEC_USE_COUNT;
}
} else { /* Add new SGL element to the previous message frame */
msg = (u32 *)(iop->mem_offset + priv->m);
sgl_elem = &msg[priv->tx_count * 3 + 1];
__raw_writel(I2O_MESSAGE_SIZE((__raw_readl(msg)>>16) + 3) | 1<<12 | SGL_OFFSET_4, msg);
__raw_writel(__raw_readl(sgl_elem-3) & 0x7FFFFFFF, sgl_elem-3); /* clear LE flag */
__raw_writel(0xD5000000 | skb->len, sgl_elem);
__raw_writel((u32)skb, sgl_elem+1);
__raw_writel(virt_to_bus(skb->data), sgl_elem+2);
}
/* If tx is in immediate mode or frame is full, send now */
if (!(priv->tx_batch_mode & 0x01) || priv->tx_count == priv->sgl_max) {
dev->trans_start = jiffies;
i2o_post_message(iop, priv->m);
dprintk(KERN_DEBUG "%s: %d packets sent.\n", dev->name, priv->tx_count);
priv->tx_count = 0;
}
/* If DDMs TxMaxPktOut reached, stop queueing layer to send more */
if (atomic_read(&priv->tx_out) >= priv->tx_max_out)
netif_stop_queue(dev);
spin_unlock_irq(&priv->tx_lock);
return 0;
}
/*
* i2o_lan_get_stats(): Fill in the statistics.
*/
static struct net_device_stats *i2o_lan_get_stats(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
u64 val64[16];
u64 supported_group[4] = { 0, 0, 0, 0 };
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0100, -1, val64,
sizeof(val64)) < 0)
printk(KERN_INFO "%s: Unable to query LAN_HISTORICAL_STATS.\n", dev->name);
else {
dprintk(KERN_DEBUG "%s: LAN_HISTORICAL_STATS queried.\n", dev->name);
priv->stats.tx_packets = val64[0];
priv->stats.tx_bytes = val64[1];
priv->stats.rx_packets = val64[2];
priv->stats.rx_bytes = val64[3];
priv->stats.tx_errors = val64[4];
priv->stats.rx_errors = val64[5];
priv->stats.rx_dropped = val64[6];
}
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0180, -1,
&supported_group, sizeof(supported_group)) < 0)
printk(KERN_INFO "%s: Unable to query LAN_SUPPORTED_OPTIONAL_HISTORICAL_STATS.\n", dev->name);
if (supported_group[2]) {
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0183, -1,
val64, sizeof(val64)) < 0)
printk(KERN_INFO "%s: Unable to query LAN_OPTIONAL_RX_HISTORICAL_STATS.\n", dev->name);
else {
dprintk(KERN_DEBUG "%s: LAN_OPTIONAL_RX_HISTORICAL_STATS queried.\n", dev->name);
priv->stats.multicast = val64[4];
priv->stats.rx_length_errors = val64[10];
priv->stats.rx_crc_errors = val64[0];
}
}
if (i2o_dev->lct_data.sub_class == I2O_LAN_ETHERNET) {
u64 supported_stats = 0;
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0200, -1,
val64, sizeof(val64)) < 0)
printk(KERN_INFO "%s: Unable to query LAN_802_3_HISTORICAL_STATS.\n", dev->name);
else {
dprintk(KERN_DEBUG "%s: LAN_802_3_HISTORICAL_STATS queried.\n", dev->name);
priv->stats.transmit_collision = val64[1] + val64[2];
priv->stats.rx_frame_errors = val64[0];
priv->stats.tx_carrier_errors = val64[6];
}
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0280, -1,
&supported_stats, sizeof(supported_stats)) < 0)
printk(KERN_INFO "%s: Unable to query LAN_SUPPORTED_802_3_HISTORICAL_STATS.\n", dev->name);
if (supported_stats != 0) {
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0281, -1,
val64, sizeof(val64)) < 0)
printk(KERN_INFO "%s: Unable to query LAN_OPTIONAL_802_3_HISTORICAL_STATS.\n", dev->name);
else {
dprintk(KERN_DEBUG "%s: LAN_OPTIONAL_802_3_HISTORICAL_STATS queried.\n", dev->name);
if (supported_stats & 0x1)
priv->stats.rx_over_errors = val64[0];
if (supported_stats & 0x4)
priv->stats.tx_heartbeat_errors = val64[2];
}
}
}
#ifdef CONFIG_TR
if (i2o_dev->lct_data.sub_class == I2O_LAN_TR) {
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0300, -1,
val64, sizeof(val64)) < 0)
printk(KERN_INFO "%s: Unable to query LAN_802_5_HISTORICAL_STATS.\n", dev->name);
else {
struct tr_statistics *stats =
(struct tr_statistics *)&priv->stats;
dprintk(KERN_DEBUG "%s: LAN_802_5_HISTORICAL_STATS queried.\n", dev->name);
stats->line_errors = val64[0];
stats->internal_errors = val64[7];
stats->burst_errors = val64[4];
stats->A_C_errors = val64[2];
stats->abort_delimiters = val64[3];
stats->lost_frames = val64[1];
/* stats->recv_congest_count = ?; FIXME ??*/
stats->frame_copied_errors = val64[5];
stats->frequency_errors = val64[6];
stats->token_errors = val64[9];
}
/* Token Ring optional stats not yet defined */
}
#endif
#ifdef CONFIG_FDDI
if (i2o_dev->lct_data.sub_class == I2O_LAN_FDDI) {
if (i2o_query_scalar(iop, i2o_dev->lct_data.tid, 0x0400, -1,
val64, sizeof(val64)) < 0)
printk(KERN_INFO "%s: Unable to query LAN_FDDI_HISTORICAL_STATS.\n", dev->name);
else {
dprintk(KERN_DEBUG "%s: LAN_FDDI_HISTORICAL_STATS queried.\n", dev->name);
priv->stats.smt_cf_state = val64[0];
memcpy(priv->stats.mac_upstream_nbr, &val64[1], FDDI_K_ALEN);
memcpy(priv->stats.mac_downstream_nbr, &val64[2], FDDI_K_ALEN);
priv->stats.mac_error_cts = val64[3];
priv->stats.mac_lost_cts = val64[4];
priv->stats.mac_rmt_state = val64[5];
memcpy(priv->stats.port_lct_fail_cts, &val64[6], 8);
memcpy(priv->stats.port_lem_reject_cts, &val64[7], 8);
memcpy(priv->stats.port_lem_cts, &val64[8], 8);
memcpy(priv->stats.port_pcm_state, &val64[9], 8);
}
/* FDDI optional stats not yet defined */
}
#endif
#ifdef CONFIG_NET_FC
/* Fibre Channel Statistics not yet defined in 1.53 nor 2.0 */
#endif
return (struct net_device_stats *)&priv->stats;
}
/*
* i2o_lan_set_mc_filter(): Post a request to set multicast filter.
*/
int i2o_lan_set_mc_filter(struct net_device *dev, u32 filter_mask)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
u32 msg[10];
msg[0] = TEN_WORD_MSG_SIZE | SGL_OFFSET_5;
msg[1] = I2O_CMD_UTIL_PARAMS_SET << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid;
msg[2] = priv->unit << 16 | lan_context;
msg[3] = 0x0001 << 16 | 3 ; // TransactionContext: group&field
msg[4] = 0;
msg[5] = 0xCC000000 | 16; // Immediate data SGL
msg[6] = 1; // OperationCount
msg[7] = 0x0001<<16 | I2O_PARAMS_FIELD_SET; // Group, Operation
msg[8] = 3 << 16 | 1; // FieldIndex, FieldCount
msg[9] = filter_mask; // Value
return i2o_post_this(iop, msg, sizeof(msg));
}
/*
* i2o_lan_set_mc_table(): Post a request to set LAN_MULTICAST_MAC_ADDRESS table.
*/
int i2o_lan_set_mc_table(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
struct i2o_controller *iop = i2o_dev->controller;
struct dev_mc_list *mc;
u32 msg[10 + 2 * dev->mc_count];
u8 *work8 = (u8 *)(msg + 10);
msg[0] = I2O_MESSAGE_SIZE(10 + 2 * dev->mc_count) | SGL_OFFSET_5;
msg[1] = I2O_CMD_UTIL_PARAMS_SET << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid;
msg[2] = priv->unit << 16 | lan_context; // InitiatorContext
msg[3] = 0x0002 << 16 | (u16)-1; // TransactionContext
msg[4] = 0; // OperationFlags
msg[5] = 0xCC000000 | (16 + 8 * dev->mc_count); // Immediate data SGL
msg[6] = 2; // OperationCount
msg[7] = 0x0002 << 16 | I2O_PARAMS_TABLE_CLEAR; // Group, Operation
msg[8] = 0x0002 << 16 | I2O_PARAMS_ROW_ADD; // Group, Operation
msg[9] = dev->mc_count << 16 | (u16)-1; // RowCount, FieldCount
for (mc = dev->mc_list; mc ; mc = mc->next, work8 += 8) {
memset(work8, 0, 8);
memcpy(work8, mc->dmi_addr, mc->dmi_addrlen); // Values
}
return i2o_post_this(iop, msg, sizeof(msg));
}
/*
* i2o_lan_set_multicast_list(): Enable a network device to receive packets
* not send to the protocol address.
*/
static void i2o_lan_set_multicast_list(struct net_device *dev)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
u32 filter_mask;
if (dev->flags & IFF_PROMISC) {
filter_mask = 0x00000002;
dprintk(KERN_INFO "%s: Enabling promiscuous mode...\n", dev->name);
} else if ((dev->flags & IFF_ALLMULTI) || dev->mc_count > priv->max_size_mc_table) {
filter_mask = 0x00000004;
dprintk(KERN_INFO "%s: Enabling all multicast mode...\n", dev->name);
} else if (dev->mc_count) {
filter_mask = 0x00000000;
dprintk(KERN_INFO "%s: Enabling multicast mode...\n", dev->name);
if (i2o_lan_set_mc_table(dev) < 0)
printk(KERN_WARNING "%s: Unable to send MAC table.\n", dev->name);
} else {
filter_mask = 0x00000300; // Broadcast, Multicast disabled
dprintk(KERN_INFO "%s: Enabling unicast mode...\n", dev->name);
}
/* Finally copy new FilterMask to DDM */
if (i2o_lan_set_mc_filter(dev, filter_mask) < 0)
printk(KERN_WARNING "%s: Unable to send MAC FilterMask.\n", dev->name);
}
/*
* i2o_lan_change_mtu(): Change maximum transfer unit size.
*/
static int i2o_lan_change_mtu(struct net_device *dev, int new_mtu)
{
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
u32 max_pkt_size;
if (i2o_query_scalar(i2o_dev->controller, i2o_dev->lct_data.tid,
0x0000, 6, &max_pkt_size, 4) < 0)
return -EFAULT;
if (new_mtu < 68 || new_mtu > 9000 || new_mtu > max_pkt_size)
return -EINVAL;
dev->mtu = new_mtu;
i2o_lan_suspend(dev); // to SUSPENDED state, return buckets
while (priv->i2o_fbl_tail >= 0) // free buffered buckets
dev_kfree_skb(priv->i2o_fbl[priv->i2o_fbl_tail--]);
i2o_lan_reset(dev); // to OPERATIONAL state
i2o_set_ddm_parameters(dev); // reset some parameters
i2o_lan_receive_post(dev); // post new buckets (new size)
return 0;
}
/* Functions to initialize I2O LAN OSM:
======================================*/
/*
* i2o_lan_register_device(): Register LAN class device to kernel.
*/
struct net_device *i2o_lan_register_device(struct i2o_device *i2o_dev)
{
struct net_device *dev = NULL;
struct i2o_lan_local *priv = NULL;
u8 hw_addr[8];
u32 tx_max_out = 0;
unsigned short (*type_trans)(struct sk_buff *, struct net_device *);
void (*unregister_dev)(struct net_device *dev);
switch (i2o_dev->lct_data.sub_class) {
case I2O_LAN_ETHERNET:
dev = init_etherdev(NULL, sizeof(struct i2o_lan_local));
if (dev == NULL)
return NULL;
type_trans = eth_type_trans;
unregister_dev = unregister_netdev;
break;
#ifdef CONFIG_ANYLAN
case I2O_LAN_100VG:
printk(KERN_ERR "i2o_lan: 100base VG not yet supported.\n");
return NULL;
break;
#endif
#ifdef CONFIG_TR
case I2O_LAN_TR:
dev = init_trdev(NULL, sizeof(struct i2o_lan_local));
if (dev==NULL)
return NULL;
type_trans = tr_type_trans;
unregister_dev = unregister_trdev;
break;
#endif
#ifdef CONFIG_FDDI
case I2O_LAN_FDDI:
{
int size = sizeof(struct net_device) + sizeof(struct i2o_lan_local);
dev = (struct net_device *) kmalloc(size, GFP_KERNEL);
if (dev == NULL)
return NULL;
memset((char *)dev, 0, size);
dev->priv = (void *)(dev + 1);
if (dev_alloc_name(dev, "fddi%d") < 0) {
printk(KERN_WARNING "i2o_lan: Too many FDDI devices.\n");
kfree(dev);
return NULL;
}
type_trans = fddi_type_trans;
unregister_dev = (void *)unregister_netdevice;
fddi_setup(dev);
register_netdev(dev);
}
break;
#endif
#ifdef CONFIG_NET_FC
case I2O_LAN_FIBRE_CHANNEL:
dev = init_fcdev(NULL, sizeof(struct i2o_lan_local));
if (dev == NULL)
return NULL;
type_trans = NULL;
/* FIXME: Move fc_type_trans() from drivers/net/fc/iph5526.c to net/802/fc.c
* and export it in include/linux/fcdevice.h
* type_trans = fc_type_trans;
*/
unregister_dev = (void *)unregister_fcdev;
break;
#endif
case I2O_LAN_UNKNOWN:
default:
printk(KERN_ERR "i2o_lan: LAN type 0x%04x not supported.\n",
i2o_dev->lct_data.sub_class);
return NULL;
}
priv = (struct i2o_lan_local *)dev->priv;
priv->i2o_dev = i2o_dev;
priv->type_trans = type_trans;
priv->sgl_max = (i2o_dev->controller->status_block->inbound_frame_size - 4) / 3;
atomic_set(&priv->buckets_out, 0);
/* Set default values for user configurable parameters */
/* Private values are changed via /proc file system */
priv->max_buckets_out = max_buckets_out;
priv->bucket_thresh = bucket_thresh;
priv->rx_copybreak = rx_copybreak;
priv->tx_batch_mode = tx_batch_mode & 0x03;
priv->i2o_event_mask = i2o_event_mask;
priv->tx_lock = SPIN_LOCK_UNLOCKED;
priv->fbl_lock = SPIN_LOCK_UNLOCKED;
unit++;
i2o_landevs[unit] = dev;
priv->unit = unit;
if (i2o_query_scalar(i2o_dev->controller, i2o_dev->lct_data.tid,
0x0001, 0, &hw_addr, sizeof(hw_addr)) < 0) {
printk(KERN_ERR "%s: Unable to query hardware address.\n", dev->name);
unit--;
unregister_dev(dev);
kfree(dev);
return NULL;
}
dprintk(KERN_DEBUG "%s: hwaddr = %02X:%02X:%02X:%02X:%02X:%02X\n",
dev->name, hw_addr[0], hw_addr[1], hw_addr[2], hw_addr[3],
hw_addr[4], hw_addr[5]);
dev->addr_len = 6;
memcpy(dev->dev_addr, hw_addr, 6);
if (i2o_query_scalar(i2o_dev->controller, i2o_dev->lct_data.tid,
0x0007, 2, &tx_max_out, sizeof(tx_max_out)) < 0) {
printk(KERN_ERR "%s: Unable to query max TX queue.\n", dev->name);
unit--;
unregister_dev(dev);
kfree(dev);
return NULL;
}
dprintk(KERN_INFO "%s: Max TX Outstanding = %d.\n", dev->name, tx_max_out);
priv->tx_max_out = tx_max_out;
atomic_set(&priv->tx_out, 0);
priv->tx_count = 0;
INIT_LIST_HEAD(&priv->i2o_batch_send_task.list);
priv->i2o_batch_send_task.sync = 0;
INIT_WORK(&priv->i2o_batch_send_task, (void *)i2o_lan_batch_send,
(void *)dev);
dev->open = i2o_lan_open;
dev->stop = i2o_lan_close;
dev->get_stats = i2o_lan_get_stats;
dev->set_multicast_list = i2o_lan_set_multicast_list;
dev->tx_timeout = i2o_lan_tx_timeout;
dev->watchdog_timeo = I2O_LAN_TX_TIMEOUT;
#ifdef CONFIG_NET_FC
if (i2o_dev->lct_data.sub_class == I2O_LAN_FIBRE_CHANNEL)
dev->hard_start_xmit = i2o_lan_sdu_send;
else
#endif
dev->hard_start_xmit = i2o_lan_packet_send;
if (i2o_dev->lct_data.sub_class == I2O_LAN_ETHERNET)
dev->change_mtu = i2o_lan_change_mtu;
return dev;
}
#ifdef MODULE
#define i2o_lan_init init_module
#endif
int __init i2o_lan_init(void)
{
struct net_device *dev;
int i;
printk(KERN_INFO "I2O LAN OSM (C) 1999 University of Helsinki.\n");
/* Module params are used as global defaults for private values */
if (max_buckets_out > I2O_LAN_MAX_BUCKETS_OUT)
max_buckets_out = I2O_LAN_MAX_BUCKETS_OUT;
if (bucket_thresh > max_buckets_out)
bucket_thresh = max_buckets_out;
/* Install handlers for incoming replies */
if (i2o_install_handler(&i2o_lan_send_handler) < 0) {
printk(KERN_ERR "i2o_lan: Unable to register I2O LAN OSM.\n");
return -EINVAL;
}
lan_send_context = i2o_lan_send_handler.context;
if (i2o_install_handler(&i2o_lan_receive_handler) < 0) {
printk(KERN_ERR "i2o_lan: Unable to register I2O LAN OSM.\n");
return -EINVAL;
}
lan_receive_context = i2o_lan_receive_handler.context;
if (i2o_install_handler(&i2o_lan_handler) < 0) {
printk(KERN_ERR "i2o_lan: Unable to register I2O LAN OSM.\n");
return -EINVAL;
}
lan_context = i2o_lan_handler.context;
for(i=0; i <= MAX_LAN_CARDS; i++)
i2o_landevs[i] = NULL;
for (i=0; i < MAX_I2O_CONTROLLERS; i++) {
struct i2o_controller *iop = i2o_find_controller(i);
struct i2o_device *i2o_dev;
if (iop==NULL)
continue;
for (i2o_dev=iop->devices;i2o_dev != NULL;i2o_dev=i2o_dev->next) {
if (i2o_dev->lct_data.class_id != I2O_CLASS_LAN)
continue;
/* Make sure device not already claimed by an ISM */
if (i2o_dev->lct_data.user_tid != 0xFFF)
continue;
if (unit == MAX_LAN_CARDS) {
i2o_unlock_controller(iop);
printk(KERN_WARNING "i2o_lan: Too many I2O LAN devices.\n");
return -EINVAL;
}
dev = i2o_lan_register_device(i2o_dev);
if (dev == NULL) {
printk(KERN_ERR "i2o_lan: Unable to register I2O LAN device 0x%04x.\n",
i2o_dev->lct_data.sub_class);
continue;
}
printk(KERN_INFO "%s: I2O LAN device registered, "
"subclass = 0x%04x, unit = %d, tid = %d.\n",
dev->name, i2o_dev->lct_data.sub_class,
((struct i2o_lan_local *)dev->priv)->unit,
i2o_dev->lct_data.tid);
}
i2o_unlock_controller(iop);
}
dprintk(KERN_INFO "%d I2O LAN devices found and registered.\n", unit+1);
return 0;
}
#ifdef MODULE
void cleanup_module(void)
{
int i;
for (i = 0; i <= unit; i++) {
struct net_device *dev = i2o_landevs[i];
struct i2o_lan_local *priv = (struct i2o_lan_local *)dev->priv;
struct i2o_device *i2o_dev = priv->i2o_dev;
switch (i2o_dev->lct_data.sub_class) {
case I2O_LAN_ETHERNET:
unregister_netdev(dev);
break;
#ifdef CONFIG_FDDI
case I2O_LAN_FDDI:
unregister_netdevice(dev);
break;
#endif
#ifdef CONFIG_TR
case I2O_LAN_TR:
unregister_trdev(dev);
break;
#endif
#ifdef CONFIG_NET_FC
case I2O_LAN_FIBRE_CHANNEL:
unregister_fcdev(dev);
break;
#endif
default:
printk(KERN_WARNING "%s: Spurious I2O LAN subclass 0x%08x.\n",
dev->name, i2o_dev->lct_data.sub_class);
}
dprintk(KERN_INFO "%s: I2O LAN device unregistered.\n",
dev->name);
kfree(dev);
}
i2o_remove_handler(&i2o_lan_handler);
i2o_remove_handler(&i2o_lan_send_handler);
i2o_remove_handler(&i2o_lan_receive_handler);
}
MODULE_AUTHOR("University of Helsinki, Department of Computer Science");
MODULE_DESCRIPTION("I2O Lan OSM");
MODULE_LICENSE("GPL");
MODULE_PARM(max_buckets_out, "1-" __MODULE_STRING(I2O_LAN_MAX_BUCKETS_OUT) "i");
MODULE_PARM_DESC(max_buckets_out, "Total number of buckets to post (1-)");
MODULE_PARM(bucket_thresh, "1-" __MODULE_STRING(I2O_LAN_MAX_BUCKETS_OUT) "i");
MODULE_PARM_DESC(bucket_thresh, "Bucket post threshold (1-)");
MODULE_PARM(rx_copybreak, "1-" "i");
MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy only small frames (1-)");
MODULE_PARM(tx_batch_mode, "0-2" "i");
MODULE_PARM_DESC(tx_batch_mode, "0=Send immediatelly, 1=Send in batches, 2=Switch automatically");
#endif
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