/*
* 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 Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI>
* Fixes: Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI>
* Taneli Vähäkangas <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)
*/
#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/tqueue.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;
DECLARE_TASK_QUEUE(i2o_post_buckets_task);
struct tq_struct run_i2o_post_buckets_task = {
routine: (void (*)(void *)) run_task_queue,
data: (void *) 0
};
/* 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;
queue_task(&run_i2o_post_buckets_task, &tq_immediate);
mark_bh(IMMEDIATE_BH);
}
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_task(&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_task(&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;
priv->i2o_batch_send_task.routine = (void *)i2o_lan_batch_send;
priv->i2o_batch_send_task.data = (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;
}
static 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;
}
static void i2o_lan_exit(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);
}
EXPORT_NO_SYMBOLS;
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");
module_init(i2o_lan_init);
module_exit(i2o_lan_exit);
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