515 строки
16 KiB
C
515 строки
16 KiB
C
/*
|
|
* 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
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/pci.h>
|
|
#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
|
|
******************************************************************************/
|
|
void
|
|
islpci_eth_cleanup_transmit(islpci_private *priv,
|
|
isl38xx_control_block *control_block)
|
|
{
|
|
struct sk_buff *skb;
|
|
u32 index;
|
|
|
|
/* compare the control block read pointer with the free pointer */
|
|
while (priv->free_data_tx !=
|
|
le32_to_cpu(control_block->
|
|
device_curr_frag[ISL38XX_CB_TX_DATA_LQ])) {
|
|
/* read the index of the first fragment to be freed */
|
|
index = priv->free_data_tx % ISL38XX_CB_TX_QSIZE;
|
|
|
|
/* check for holes in the arrays caused by multi fragment frames
|
|
* searching for the last fragment of a frame */
|
|
if (priv->pci_map_tx_address[index] != (dma_addr_t) NULL) {
|
|
/* entry is the last fragment of a frame
|
|
* free the skb structure and unmap pci memory */
|
|
skb = priv->data_low_tx[index];
|
|
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_TRACING,
|
|
"cleanup skb %p skb->data %p skb->len %u truesize %u\n ",
|
|
skb, skb->data, skb->len, skb->truesize);
|
|
#endif
|
|
|
|
pci_unmap_single(priv->pdev,
|
|
priv->pci_map_tx_address[index],
|
|
skb->len, PCI_DMA_TODEVICE);
|
|
dev_kfree_skb_irq(skb);
|
|
skb = NULL;
|
|
}
|
|
/* increment the free data low queue pointer */
|
|
priv->free_data_tx++;
|
|
}
|
|
}
|
|
|
|
int
|
|
islpci_eth_transmit(struct sk_buff *skb, struct net_device *ndev)
|
|
{
|
|
islpci_private *priv = netdev_priv(ndev);
|
|
isl38xx_control_block *cb = priv->control_block;
|
|
u32 index;
|
|
dma_addr_t pci_map_address;
|
|
int frame_size;
|
|
isl38xx_fragment *fragment;
|
|
int offset;
|
|
struct sk_buff *newskb;
|
|
int newskb_offset;
|
|
unsigned long flags;
|
|
unsigned char wds_mac[6];
|
|
u32 curr_frag;
|
|
int err = 0;
|
|
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_FUNCTION_CALLS, "islpci_eth_transmit \n");
|
|
#endif
|
|
|
|
/* lock the driver code */
|
|
spin_lock_irqsave(&priv->slock, flags);
|
|
|
|
/* 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 (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);
|
|
|
|
/* trigger the device */
|
|
isl38xx_w32_flush(priv->device_base, ISL38XX_DEV_INT_UPDATE,
|
|
ISL38XX_DEV_INT_REG);
|
|
udelay(ISL38XX_WRITEIO_DELAY);
|
|
|
|
err = -EBUSY;
|
|
goto drop_free;
|
|
}
|
|
/* 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 (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;
|
|
|
|
/* check whether the current skb can be used */
|
|
if (!skb_cloned(skb) && (skb_tailroom(skb) >= offset)) {
|
|
unsigned char *src = skb->data;
|
|
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_TRACING, "skb offset %i wds %i\n", offset,
|
|
init_wds);
|
|
#endif
|
|
|
|
/* align the buffer on 4-byte boundary */
|
|
skb_reserve(skb, (4 - (long) skb->data) & 0x03);
|
|
if (init_wds) {
|
|
/* wds requires an additional address field of 6 bytes */
|
|
skb_put(skb, 6);
|
|
#ifdef ISLPCI_ETH_DEBUG
|
|
printk("islpci_eth_transmit:wds_mac\n");
|
|
#endif
|
|
memmove(skb->data + 6, src, skb->len);
|
|
skb_copy_to_linear_data(skb, wds_mac, 6);
|
|
} else {
|
|
memmove(skb->data, src, skb->len);
|
|
}
|
|
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_TRACING, "memmove %p %p %i \n", skb->data,
|
|
src, skb->len);
|
|
#endif
|
|
} 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 */
|
|
if (newskb_offset)
|
|
skb_reserve(newskb, newskb_offset);
|
|
|
|
skb_put(newskb, init_wds ? skb->len + 6 : skb->len);
|
|
if (init_wds) {
|
|
skb_copy_from_linear_data(skb,
|
|
newskb->data + 6,
|
|
skb->len);
|
|
skb_copy_to_linear_data(newskb, wds_mac, 6);
|
|
#ifdef ISLPCI_ETH_DEBUG
|
|
printk("islpci_eth_transmit:wds_mac\n");
|
|
#endif
|
|
} else
|
|
skb_copy_from_linear_data(skb, newskb->data,
|
|
skb->len);
|
|
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_TRACING, "memcpy %p %p %i wds %i\n",
|
|
newskb->data, skb->data, skb->len, init_wds);
|
|
#endif
|
|
|
|
newskb->dev = skb->dev;
|
|
dev_kfree_skb_irq(skb);
|
|
skb = newskb;
|
|
}
|
|
}
|
|
/* display the buffer contents for debugging */
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_BUFFER_CONTENTS, "\ntx %p ", skb->data);
|
|
display_buffer((char *) skb->data, skb->len);
|
|
#endif
|
|
|
|
/* map the skb buffer to pci memory for DMA operation */
|
|
pci_map_address = pci_map_single(priv->pdev,
|
|
(void *) skb->data, skb->len,
|
|
PCI_DMA_TODEVICE);
|
|
if (unlikely(pci_map_address == 0)) {
|
|
printk(KERN_WARNING "%s: cannot map buffer to PCI\n",
|
|
ndev->name);
|
|
|
|
err = -EIO;
|
|
goto drop_free;
|
|
}
|
|
/* Place the fragment in the control block structure. */
|
|
index = curr_frag % ISL38XX_CB_TX_QSIZE;
|
|
fragment = &cb->tx_data_low[index];
|
|
|
|
priv->pci_map_tx_address[index] = pci_map_address;
|
|
/* store the skb address for future freeing */
|
|
priv->data_low_tx[index] = skb;
|
|
/* set the proper fragment start address and size information */
|
|
frame_size = skb->len;
|
|
fragment->size = cpu_to_le16(frame_size);
|
|
fragment->flags = cpu_to_le16(0); /* set to 1 if more fragments */
|
|
fragment->address = cpu_to_le32(pci_map_address);
|
|
curr_frag++;
|
|
|
|
/* The fragment address in the control block must have been
|
|
* written before announcing the frame buffer to device. */
|
|
wmb();
|
|
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) {
|
|
/* stop sends from upper layers */
|
|
netif_stop_queue(ndev);
|
|
|
|
/* set the full flag for the transmission queue */
|
|
priv->data_low_tx_full = 1;
|
|
}
|
|
|
|
/* set the transmission time */
|
|
ndev->trans_start = jiffies;
|
|
priv->statistics.tx_packets++;
|
|
priv->statistics.tx_bytes += skb->len;
|
|
|
|
/* trigger the device */
|
|
islpci_trigger(priv);
|
|
|
|
/* unlock the driver code */
|
|
spin_unlock_irqrestore(&priv->slock, flags);
|
|
|
|
return 0;
|
|
|
|
drop_free:
|
|
priv->statistics.tx_dropped++;
|
|
spin_unlock_irqrestore(&priv->slock, flags);
|
|
dev_kfree_skb(skb);
|
|
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_reset_mac_header(*skb);
|
|
(*skb)->pkt_type = PACKET_OTHERHOST;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
islpci_eth_receive(islpci_private *priv)
|
|
{
|
|
struct net_device *ndev = priv->ndev;
|
|
isl38xx_control_block *control_block = priv->control_block;
|
|
struct sk_buff *skb;
|
|
u16 size;
|
|
u32 index, offset;
|
|
unsigned char *src;
|
|
int discard = 0;
|
|
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_FUNCTION_CALLS, "islpci_eth_receive \n");
|
|
#endif
|
|
|
|
/* the device has written an Ethernet frame in the data area
|
|
* of the sk_buff without updating the structure, do it now */
|
|
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) -
|
|
(unsigned long) skb->data) & 3;
|
|
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_TRACING,
|
|
"frq->addr %x skb->data %p skb->len %u offset %u truesize %u\n ",
|
|
control_block->rx_data_low[priv->free_data_rx].address, skb->data,
|
|
skb->len, offset, skb->truesize);
|
|
#endif
|
|
|
|
/* delete the streaming DMA mapping before processing the skb */
|
|
pci_unmap_single(priv->pdev,
|
|
priv->pci_map_rx_address[index],
|
|
MAX_FRAGMENT_SIZE_RX + 2, PCI_DMA_FROMDEVICE);
|
|
|
|
/* update the skb structure and allign the buffer */
|
|
skb_put(skb, size);
|
|
if (offset) {
|
|
/* shift the buffer allocation offset bytes to get the right frame */
|
|
skb_pull(skb, 2);
|
|
skb_put(skb, 2);
|
|
}
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
/* display the buffer contents for debugging */
|
|
DEBUG(SHOW_BUFFER_CONTENTS, "\nrx %p ", skb->data);
|
|
display_buffer((char *) skb->data, skb->len);
|
|
#endif
|
|
|
|
/* check whether WDS is enabled and whether the data frame is a WDS frame */
|
|
|
|
if (init_wds) {
|
|
/* WDS enabled, check for the wds address on the first 6 bytes of the buffer */
|
|
src = skb->data + 6;
|
|
memmove(skb->data, src, skb->len - 6);
|
|
skb_trim(skb, skb->len - 6);
|
|
}
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_TRACING, "Fragment size %i in skb at %p\n", size, skb);
|
|
DEBUG(SHOW_TRACING, "Skb data at %p, length %i\n", skb->data, skb->len);
|
|
|
|
/* display the buffer contents for debugging */
|
|
DEBUG(SHOW_BUFFER_CONTENTS, "\nrx %p ", skb->data);
|
|
display_buffer((char *) skb->data, skb->len);
|
|
#endif
|
|
/* take care of monitor mode and spy monitoring. */
|
|
if (unlikely(priv->iw_mode == IW_MODE_MONITOR)) {
|
|
skb->dev = ndev;
|
|
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);
|
|
|
|
skb_copy_from_linear_data(skb,
|
|
(skb->data +
|
|
sizeof(struct rfmon_header)),
|
|
2 * ETH_ALEN);
|
|
skb_pull(skb, sizeof (struct rfmon_header));
|
|
}
|
|
skb->protocol = eth_type_trans(skb, ndev);
|
|
}
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
priv->statistics.rx_packets++;
|
|
priv->statistics.rx_bytes += size;
|
|
|
|
/* deliver the skb to the network layer */
|
|
#ifdef ISLPCI_ETH_DEBUG
|
|
printk
|
|
("islpci_eth_receive:netif_rx %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n",
|
|
skb->data[0], skb->data[1], skb->data[2], skb->data[3],
|
|
skb->data[4], skb->data[5]);
|
|
#endif
|
|
if (unlikely(discard)) {
|
|
dev_kfree_skb_irq(skb);
|
|
skb = NULL;
|
|
} else
|
|
netif_rx(skb);
|
|
|
|
/* increment the read index for the rx data low queue */
|
|
priv->free_data_rx++;
|
|
|
|
/* add one or more sk_buff structures */
|
|
while (index =
|
|
le32_to_cpu(control_block->
|
|
driver_curr_frag[ISL38XX_CB_RX_DATA_LQ]),
|
|
index - priv->free_data_rx < ISL38XX_CB_RX_QSIZE) {
|
|
/* allocate an sk_buff for received data frames storage
|
|
* include any required allignment operations */
|
|
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;
|
|
|
|
#if VERBOSE > SHOW_ERROR_MESSAGES
|
|
DEBUG(SHOW_TRACING,
|
|
"new alloc skb %p skb->data %p skb->len %u index %u truesize %u\n ",
|
|
skb, skb->data, skb->len, index, skb->truesize);
|
|
#endif
|
|
|
|
/* set the streaming DMA mapping for proper PCI bus operation */
|
|
priv->pci_map_rx_address[index] =
|
|
pci_map_single(priv->pdev, (void *) skb->data,
|
|
MAX_FRAGMENT_SIZE_RX + 2,
|
|
PCI_DMA_FROMDEVICE);
|
|
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_irq((struct sk_buff *) skb);
|
|
skb = NULL;
|
|
break;
|
|
}
|
|
/* update the fragment address */
|
|
control_block->rx_data_low[index].address =
|
|
cpu_to_le32((u32)priv->pci_map_rx_address[index]);
|
|
wmb();
|
|
|
|
/* increment the driver read pointer */
|
|
add_le32p(&control_block->
|
|
driver_curr_frag[ISL38XX_CB_RX_DATA_LQ], 1);
|
|
}
|
|
|
|
/* trigger the device */
|
|
islpci_trigger(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
islpci_do_reset_and_wake(struct work_struct *work)
|
|
{
|
|
islpci_private *priv = container_of(work, islpci_private, reset_task);
|
|
|
|
islpci_reset(priv, 1);
|
|
priv->reset_task_pending = 0;
|
|
smp_wmb();
|
|
netif_wake_queue(priv->ndev);
|
|
}
|
|
|
|
void
|
|
islpci_eth_tx_timeout(struct net_device *ndev)
|
|
{
|
|
islpci_private *priv = netdev_priv(ndev);
|
|
struct net_device_stats *statistics = &priv->statistics;
|
|
|
|
/* increment the transmit error counter */
|
|
statistics->tx_errors++;
|
|
|
|
if (!priv->reset_task_pending) {
|
|
printk(KERN_WARNING
|
|
"%s: tx_timeout, scheduling reset", ndev->name);
|
|
netif_stop_queue(ndev);
|
|
priv->reset_task_pending = 1;
|
|
schedule_work(&priv->reset_task);
|
|
} else {
|
|
printk(KERN_WARNING
|
|
"%s: tx_timeout, waiting for reset", ndev->name);
|
|
}
|
|
}
|