-/* $Header: /var/lib/cvs/prism54-ng/ksrc/islpci_eth.c,v 1.27 2004/01/30 16:24:00 ajfa Exp $
+/*
*
* Copyright (C) 2002 Intersil Americas Inc.
- *
+ * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
* 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
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include "prismcompat.h"
#include "isl_38xx.h"
#include "islpci_eth.h"
#include "islpci_mgt.h"
+#include "oid_mgt.h"
/******************************************************************************
Network Interface functions
/* check whether the destination queue has enough fragments for the frame */
curr_frag = le32_to_cpu(cb->driver_curr_frag[ISL38XX_CB_TX_DATA_LQ]);
- if (curr_frag - priv->free_data_tx >= ISL38XX_CB_TX_QSIZE) {
+ if (unlikely(curr_frag - priv->free_data_tx >= ISL38XX_CB_TX_QSIZE)) {
printk(KERN_ERR "%s: transmit device queue full when awake\n",
ndev->name);
netif_stop_queue(ndev);
/* Check alignment and WDS frame formatting. The start of the packet should
* be aligned on a 4-byte boundary. If WDS is enabled add another 6 bytes
* and add WDS address information */
- if (((long) skb->data & 0x03) | init_wds) {
+ if (likely(((long) skb->data & 0x03) | init_wds)) {
/* get the number of bytes to add and re-allign */
offset = (4 - (long) skb->data) & 0x03;
offset += init_wds ? 6 : 0;
} else {
newskb =
dev_alloc_skb(init_wds ? skb->len + 6 : skb->len);
+ if (unlikely(newskb == NULL)) {
+ printk(KERN_ERR "%s: Cannot allocate skb\n",
+ ndev->name);
+ err = -ENOMEM;
+ goto drop_free;
+ }
newskb_offset = (4 - (long) newskb->data) & 0x03;
/* Check if newskb->data is aligned */
pci_map_address = pci_map_single(priv->pdev,
(void *) skb->data, skb->len,
PCI_DMA_TODEVICE);
- if (pci_map_address == 0) {
+ if (unlikely(pci_map_address == 0)) {
printk(KERN_WARNING "%s: cannot map buffer to PCI\n",
ndev->name);
priv->data_low_tx[index] = skb;
/* set the proper fragment start address and size information */
fragment->size = cpu_to_le16(frame_size);
- fragment->flags = cpu_to_le16(0); /* set to 1 if more fragments */
+ fragment->flags = cpu_to_le16(0); /* set to 1 if more fragments */
fragment->address = cpu_to_le32(pci_map_address);
curr_frag++;
cb->driver_curr_frag[ISL38XX_CB_TX_DATA_LQ] = cpu_to_le32(curr_frag);
if (curr_frag - priv->free_data_tx + ISL38XX_MIN_QTHRESHOLD
- > ISL38XX_CB_TX_QSIZE) {
+ > ISL38XX_CB_TX_QSIZE) {
/* stop sends from upper layers */
netif_stop_queue(ndev);
return 0;
- drop_free:
+ drop_free:
/* free the skbuf structure before aborting */
dev_kfree_skb(skb);
skb = NULL;
return err;
}
+static inline int
+islpci_monitor_rx(islpci_private *priv, struct sk_buff **skb)
+{
+ /* The card reports full 802.11 packets but with a 20 bytes
+ * header and without the FCS. But there a is a bit that
+ * indicates if the packet is corrupted :-) */
+ struct rfmon_header *hdr = (struct rfmon_header *) (*skb)->data;
+ if (hdr->flags & 0x01)
+ /* This one is bad. Drop it ! */
+ return -1;
+ if (priv->ndev->type == ARPHRD_IEEE80211_PRISM) {
+ struct avs_80211_1_header *avs;
+ /* extract the relevant data from the header */
+ u32 clock = le32_to_cpu(hdr->clock);
+ u8 rate = hdr->rate;
+ u16 freq = le16_to_cpu(hdr->freq);
+ u8 rssi = hdr->rssi;
+
+ skb_pull(*skb, sizeof (struct rfmon_header));
+
+ if (skb_headroom(*skb) < sizeof (struct avs_80211_1_header)) {
+ struct sk_buff *newskb = skb_copy_expand(*skb,
+ sizeof (struct
+ avs_80211_1_header),
+ 0, GFP_ATOMIC);
+ if (newskb) {
+ dev_kfree_skb_irq(*skb);
+ *skb = newskb;
+ } else
+ return -1;
+ /* This behavior is not very subtile... */
+ }
+
+ /* make room for the new header and fill it. */
+ avs =
+ (struct avs_80211_1_header *) skb_push(*skb,
+ sizeof (struct
+ avs_80211_1_header));
+
+ avs->version = cpu_to_be32(P80211CAPTURE_VERSION);
+ avs->length = cpu_to_be32(sizeof (struct avs_80211_1_header));
+ avs->mactime = cpu_to_be64(le64_to_cpu(clock));
+ avs->hosttime = cpu_to_be64(jiffies);
+ avs->phytype = cpu_to_be32(6); /*OFDM: 6 for (g), 8 for (a) */
+ avs->channel = cpu_to_be32(channel_of_freq(freq));
+ avs->datarate = cpu_to_be32(rate * 5);
+ avs->antenna = cpu_to_be32(0); /*unknown */
+ avs->priority = cpu_to_be32(0); /*unknown */
+ avs->ssi_type = cpu_to_be32(3); /*2: dBm, 3: raw RSSI */
+ avs->ssi_signal = cpu_to_be32(rssi & 0x7f);
+ avs->ssi_noise = cpu_to_be32(priv->local_iwstatistics.qual.noise); /*better than 'undefined', I assume */
+ avs->preamble = cpu_to_be32(0); /*unknown */
+ avs->encoding = cpu_to_be32(0); /*unknown */
+ } else
+ skb_pull(*skb, sizeof (struct rfmon_header));
+
+ (*skb)->protocol = htons(ETH_P_802_2);
+ (*skb)->mac.raw = (*skb)->data;
+ (*skb)->pkt_type = PACKET_OTHERHOST;
+
+ return 0;
+}
+
int
islpci_eth_receive(islpci_private *priv)
{
index = priv->free_data_rx % ISL38XX_CB_RX_QSIZE;
size = le16_to_cpu(control_block->rx_data_low[index].size);
skb = priv->data_low_rx[index];
- offset = ((unsigned long) le32_to_cpu(control_block->rx_data_low[index].address) -
+ offset = ((unsigned long)
+ le32_to_cpu(control_block->rx_data_low[index].address) -
(unsigned long) skb->data) & 3;
#if VERBOSE > SHOW_ERROR_MESSAGES
/* do some additional sk_buff and network layer parameters */
skb->dev = ndev;
- /* take care of monitor mode */
- if (priv->iw_mode == IW_MODE_MONITOR) {
- /* The card reports full 802.11 packets but with a 20 bytes
- * header and without the FCS. But there a is a bit that
- * indicates if the packet is corrupted :-) */
- /* int i; */
- if (skb->data[8] & 0x01){
- /* This one is bad. Drop it !*/
- discard = 1;
- /* printk("BAD\n");*/
+ /* take care of monitor mode and spy monitoring. */
+ if (unlikely(priv->iw_mode == IW_MODE_MONITOR))
+ discard = islpci_monitor_rx(priv, &skb);
+ else {
+ if (unlikely(skb->data[2 * ETH_ALEN] == 0)) {
+ /* The packet has a rx_annex. Read it for spy monitoring, Then
+ * remove it, while keeping the 2 leading MAC addr.
+ */
+ struct iw_quality wstats;
+ struct rx_annex_header *annex =
+ (struct rx_annex_header *) skb->data;
+ wstats.level = annex->rfmon.rssi;
+ /* The noise value can be a bit outdated if nobody's
+ * reading wireless stats... */
+ wstats.noise = priv->local_iwstatistics.qual.noise;
+ wstats.qual = wstats.level - wstats.noise;
+ wstats.updated = 0x07;
+ /* Update spy records */
+ wireless_spy_update(ndev, annex->addr2, &wstats);
+
+ memcpy(skb->data + sizeof (struct rfmon_header),
+ skb->data, 2 * ETH_ALEN);
+ skb_pull(skb, sizeof (struct rfmon_header));
}
- /*
- for(i=0;i<50;i++)
- printk("%2.2X:",skb->data[i]);
- printk("\n");
- */
- skb_pull(skb, 20);
- skb->protocol = htons(ETH_P_802_2);
- skb->mac.raw = skb->data;
- skb->pkt_type = PACKET_OTHERHOST;
- } else
skb->protocol = eth_type_trans(skb, ndev);
-
+ }
skb->ip_summed = CHECKSUM_NONE;
priv->statistics.rx_packets++;
priv->statistics.rx_bytes += size;
skb->data[0], skb->data[1], skb->data[2], skb->data[3],
skb->data[4], skb->data[5]);
#endif
- if (discard) {
- dev_kfree_skb(skb);
+ if (unlikely(discard)) {
+ dev_kfree_skb_irq(skb);
skb = NULL;
- }
- else
+ } else
netif_rx(skb);
/* increment the read index for the rx data low queue */
index - priv->free_data_rx < ISL38XX_CB_RX_QSIZE) {
/* allocate an sk_buff for received data frames storage
* include any required allignment operations */
- if (skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2), skb == NULL) {
+ skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2);
+ if (unlikely(skb == NULL)) {
/* error allocating an sk_buff structure elements */
DEBUG(SHOW_ERROR_MESSAGES, "Error allocating skb \n");
break;
}
+ skb_reserve(skb, (4 - (long) skb->data) & 0x03);
/* store the new skb structure pointer */
index = index % ISL38XX_CB_RX_QSIZE;
priv->data_low_rx[index] = skb;
pci_map_single(priv->pdev, (void *) skb->data,
MAX_FRAGMENT_SIZE_RX + 2,
PCI_DMA_FROMDEVICE);
- if (priv->pci_map_rx_address[index] == (dma_addr_t) NULL) {
+ if (unlikely(priv->pci_map_rx_address[index] == (dma_addr_t) NULL)) {
/* error mapping the buffer to device accessable memory address */
DEBUG(SHOW_ERROR_MESSAGES,
"Error mapping DMA address\n");
/* free the skbuf structure before aborting */
- dev_kfree_skb((struct sk_buff *) skb);
+ dev_kfree_skb_irq((struct sk_buff *) skb);
skb = NULL;
break;
}
wmb();
/* increment the driver read pointer */
- add_le32p((u32 *) & control_block->
+ add_le32p((u32 *) &control_block->
driver_curr_frag[ISL38XX_CB_RX_DATA_LQ], 1);
}
return 0;
}
+void
+islpci_do_reset_and_wake(void *data)
+{
+ islpci_private *priv = (islpci_private *) data;
+ islpci_reset(priv, 1);
+ netif_wake_queue(priv->ndev);
+ priv->reset_task_pending = 0;
+}
+
void
islpci_eth_tx_timeout(struct net_device *ndev)
{
/* increment the transmit error counter */
statistics->tx_errors++;
-#if 0
- /* don't do this here! we are not allowed to sleep since we are in interrupt context */
- if (islpci_reset(priv))
- printk(KERN_ERR "%s: error on TX timeout card reset!\n",
- ndev->name);
-#endif
-
- /* netif_wake_queue(ndev); */
- return;
+ printk(KERN_WARNING "%s: tx_timeout", ndev->name);
+ if (!priv->reset_task_pending) {
+ priv->reset_task_pending = 1;
+ printk(", scheduling a reset");
+ netif_stop_queue(ndev);
+ schedule_work(&priv->reset_task);
+ }
+ printk("\n");
}
git://git.onelab.eu / linux-2.6.git / blobdiff