Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 519 insertions, 0 deletions

diff --git a/drivers/net/wireless/prism54/islpci_eth.c b/drivers/net/wireless/prism54/islpci_eth.c
new file mode 100644
index 00000000000..5952e996049
--- /dev/null
+++ b/drivers/net/wireless/prism54/islpci_eth.c
@@ -0,0 +1,519 @@
+/*
+ *  
+ *  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/version.h>
+#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);
+
+	/* determine the amount of fragments needed to store the frame */
+
+	frame_size = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
+	if (init_wds)
+		frame_size += 6;
+
+	/* 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);
+				memcpy(skb->data, 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) {
+				memcpy(newskb->data + 6, skb->data, skb->len);
+				memcpy(newskb->data, wds_mac, 6);
+#ifdef ISLPCI_ETH_DEBUG
+				printk("islpci_eth_transmit:wds_mac\n");
+#endif
+			} else
+				memcpy(newskb->data, skb->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(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 */
+	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;
+	}
+
+	/* trigger the device */
+	islpci_trigger(priv);
+
+	/* unlock the driver code */
+	spin_unlock_irqrestore(&priv->slock, flags);
+
+	/* set the transmission time */
+	ndev->trans_start = jiffies;
+	priv->statistics.tx_packets++;
+	priv->statistics.tx_bytes += skb->len;
+
+	return 0;
+
+      drop_free:
+	/* free the skbuf structure before aborting */
+	dev_kfree_skb(skb);
+	skb = NULL;
+
+	priv->statistics.tx_dropped++;
+	spin_unlock_irqrestore(&priv->slock, flags);
+	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)
+{
+	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
+
+	/* do some additional sk_buff and network layer parameters */
+	skb->dev = ndev;
+
+	/* 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));
+		}
+		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((u32 *) &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(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)
+{
+	islpci_private *priv = netdev_priv(ndev);
+	struct net_device_stats *statistics = &priv->statistics;
+
+	/* increment the transmit error counter */
+	statistics->tx_errors++;
+
+	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");
+}