forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
489 lines
15 KiB
489 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright (C) 2002 Intersil Americas Inc. |
|
* Copyright (C) 2004 Aurelien Alleaume <[email protected]> |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/gfp.h> |
|
|
|
#include <linux/pci.h> |
|
#include <linux/delay.h> |
|
#include <linux/netdevice.h> |
|
#include <linux/etherdevice.h> |
|
#include <linux/if_arp.h> |
|
#include <asm/byteorder.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]) { |
|
/* 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 |
|
|
|
dma_unmap_single(&priv->pdev->dev, |
|
priv->pci_map_tx_address[index], |
|
skb->len, DMA_TO_DEVICE); |
|
dev_kfree_skb_irq(skb); |
|
skb = NULL; |
|
} |
|
/* increment the free data low queue pointer */ |
|
priv->free_data_tx++; |
|
} |
|
} |
|
|
|
netdev_tx_t |
|
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; |
|
|
|
#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); |
|
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-align */ |
|
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); |
|
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 = dma_map_single(&priv->pdev->dev, (void *)skb->data, |
|
skb->len, DMA_TO_DEVICE); |
|
if (dma_mapping_error(&priv->pdev->dev, pci_map_address)) { |
|
printk(KERN_WARNING "%s: cannot map buffer to PCI\n", |
|
ndev->name); |
|
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; |
|
} |
|
|
|
ndev->stats.tx_packets++; |
|
ndev->stats.tx_bytes += skb->len; |
|
|
|
/* trigger the device */ |
|
islpci_trigger(priv); |
|
|
|
/* unlock the driver code */ |
|
spin_unlock_irqrestore(&priv->slock, flags); |
|
|
|
return NETDEV_TX_OK; |
|
|
|
drop_free: |
|
ndev->stats.tx_dropped++; |
|
spin_unlock_irqrestore(&priv->slock, flags); |
|
dev_kfree_skb(skb); |
|
return NETDEV_TX_OK; |
|
} |
|
|
|
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 = 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(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 */ |
|
dma_unmap_single(&priv->pdev->dev, priv->pci_map_rx_address[index], |
|
MAX_FRAGMENT_SIZE_RX + 2, DMA_FROM_DEVICE); |
|
|
|
/* update the skb structure and align 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; |
|
ndev->stats.rx_packets++; |
|
ndev->stats.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] = |
|
dma_map_single(&priv->pdev->dev, (void *)skb->data, |
|
MAX_FRAGMENT_SIZE_RX + 2, DMA_FROM_DEVICE); |
|
if (dma_mapping_error(&priv->pdev->dev, priv->pci_map_rx_address[index])) { |
|
/* error mapping the buffer to device accessible memory address */ |
|
DEBUG(SHOW_ERROR_MESSAGES, |
|
"Error mapping DMA address\n"); |
|
|
|
/* free the skbuf structure before aborting */ |
|
dev_kfree_skb_irq(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 */ |
|
le32_add_cpu(&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, unsigned int txqueue) |
|
{ |
|
islpci_private *priv = netdev_priv(ndev); |
|
|
|
/* increment the transmit error counter */ |
|
ndev->stats.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); |
|
} |
|
}
|
|
|