diff options
| -rw-r--r-- | drivers/net/wireless/airo.c | 231 |
1 files changed, 172 insertions, 59 deletions
diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c index 6f591abacfdc..108d9fed8f07 100644 --- a/drivers/net/wireless/airo.c +++ b/drivers/net/wireless/airo.c @@ -770,6 +770,11 @@ typedef struct { } BSSListRid; typedef struct { + BSSListRid bss; + struct list_head list; +} BSSListElement; + +typedef struct { u8 rssipct; u8 rssidBm; } tdsRssiEntry; @@ -1120,6 +1125,8 @@ static int decapsulate(struct airo_info *ai, MICBuffer *mic, etherHead *pPacket, static u8 airo_rssi_to_dbm (tdsRssiEntry *rssi_rid, u8 rssi); static u8 airo_dbm_to_pct (tdsRssiEntry *rssi_rid, u8 dbm); +static void airo_networks_free(struct airo_info *ai); + struct airo_info { struct net_device_stats stats; struct net_device *dev; @@ -1151,7 +1158,7 @@ struct airo_info { #define FLAG_COMMIT 13 #define FLAG_RESET 14 #define FLAG_FLASHING 15 -#define JOB_MASK 0x1ff0000 +#define JOB_MASK 0x2ff0000 #define JOB_DIE 16 #define JOB_XMIT 17 #define JOB_XMIT11 18 @@ -1161,6 +1168,7 @@ struct airo_info { #define JOB_EVENT 22 #define JOB_AUTOWEP 23 #define JOB_WSTATS 24 +#define JOB_SCAN_RESULTS 25 int (*bap_read)(struct airo_info*, u16 *pu16Dst, int bytelen, int whichbap); unsigned short *flash; @@ -1177,7 +1185,7 @@ struct airo_info { } xmit, xmit11; struct net_device *wifidev; struct iw_statistics wstats; // wireless stats - unsigned long scan_timestamp; /* Time started to scan */ + unsigned long scan_timeout; /* Time scan should be read */ struct iw_spy_data spy_data; struct iw_public_data wireless_data; /* MIC stuff */ @@ -1199,6 +1207,10 @@ struct airo_info { APListRid *APList; #define PCI_SHARED_LEN 2*MPI_MAX_FIDS*PKTSIZE+RIDSIZE char proc_name[IFNAMSIZ]; + + struct list_head network_list; + struct list_head network_free_list; + BSSListElement *networks; }; static inline int bap_read(struct airo_info *ai, u16 *pu16Dst, int bytelen, @@ -2381,6 +2393,8 @@ void stop_airo_card( struct net_device *dev, int freeres ) dev_kfree_skb(skb); } + airo_networks_free (ai); + kfree(ai->flash); kfree(ai->rssi); kfree(ai->APList); @@ -2687,6 +2701,42 @@ static int reset_card( struct net_device *dev , int lock) { return 0; } +#define MAX_NETWORK_COUNT 64 +static int airo_networks_allocate(struct airo_info *ai) +{ + if (ai->networks) + return 0; + + ai->networks = + kzalloc(MAX_NETWORK_COUNT * sizeof(BSSListElement), + GFP_KERNEL); + if (!ai->networks) { + airo_print_warn(ai->dev->name, "Out of memory allocating beacons"); + return -ENOMEM; + } + + return 0; +} + +static void airo_networks_free(struct airo_info *ai) +{ + if (!ai->networks) + return; + kfree(ai->networks); + ai->networks = NULL; +} + +static void airo_networks_initialize(struct airo_info *ai) +{ + int i; + + INIT_LIST_HEAD(&ai->network_free_list); + INIT_LIST_HEAD(&ai->network_list); + for (i = 0; i < MAX_NETWORK_COUNT; i++) + list_add_tail(&ai->networks[i].list, + &ai->network_free_list); +} + static struct net_device *_init_airo_card( unsigned short irq, int port, int is_pcmcia, struct pci_dev *pci, struct device *dmdev ) @@ -2728,6 +2778,10 @@ static struct net_device *_init_airo_card( unsigned short irq, int port, if (rc) goto err_out_thr; + if (airo_networks_allocate (ai)) + goto err_out_unlink; + airo_networks_initialize (ai); + /* The Airo-specific entries in the device structure. */ if (test_bit(FLAG_MPI,&ai->flags)) { skb_queue_head_init (&ai->txq); @@ -2749,7 +2803,6 @@ static struct net_device *_init_airo_card( unsigned short irq, int port, SET_NETDEV_DEV(dev, dmdev); - reset_card (dev, 1); msleep(400); @@ -2892,6 +2945,65 @@ static void airo_send_event(struct net_device *dev) { wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); } +static void airo_process_scan_results (struct airo_info *ai) { + union iwreq_data wrqu; + BSSListRid BSSList; + int rc; + BSSListElement * loop_net; + BSSListElement * tmp_net; + + /* Blow away current list of scan results */ + list_for_each_entry_safe (loop_net, tmp_net, &ai->network_list, list) { + list_move_tail (&loop_net->list, &ai->network_free_list); + /* Don't blow away ->list, just BSS data */ + memset (loop_net, 0, sizeof (loop_net->bss)); + } + + /* Try to read the first entry of the scan result */ + rc = PC4500_readrid(ai, RID_BSSLISTFIRST, &BSSList, sizeof(BSSList), 0); + if((rc) || (BSSList.index == 0xffff)) { + /* No scan results */ + goto out; + } + + /* Read and parse all entries */ + tmp_net = NULL; + while((!rc) && (BSSList.index != 0xffff)) { + /* Grab a network off the free list */ + if (!list_empty(&ai->network_free_list)) { + tmp_net = list_entry(ai->network_free_list.next, + BSSListElement, list); + list_del(ai->network_free_list.next); + } + + if (tmp_net != NULL) { + memcpy(tmp_net, &BSSList, sizeof(tmp_net->bss)); + list_add_tail(&tmp_net->list, &ai->network_list); + tmp_net = NULL; + } + + /* Read next entry */ + rc = PC4500_readrid(ai, RID_BSSLISTNEXT, + &BSSList, sizeof(BSSList), 0); + } + +out: + ai->scan_timeout = 0; + clear_bit(JOB_SCAN_RESULTS, &ai->flags); + up(&ai->sem); + + /* Send an empty event to user space. + * We don't send the received data on + * the event because it would require + * us to do complex transcoding, and + * we want to minimise the work done in + * the irq handler. Use a request to + * extract the data - Jean II */ + wrqu.data.length = 0; + wrqu.data.flags = 0; + wireless_send_event(ai->dev, SIOCGIWSCAN, &wrqu, NULL); +} + static int airo_thread(void *data) { struct net_device *dev = data; struct airo_info *ai = dev->priv; @@ -2921,13 +3033,26 @@ static int airo_thread(void *data) { set_current_state(TASK_INTERRUPTIBLE); if (ai->flags & JOB_MASK) break; - if (ai->expires) { - if (time_after_eq(jiffies,ai->expires)){ + if (ai->expires || ai->scan_timeout) { + if (ai->scan_timeout && + time_after_eq(jiffies,ai->scan_timeout)){ + set_bit(JOB_SCAN_RESULTS,&ai->flags); + break; + } else if (ai->expires && + time_after_eq(jiffies,ai->expires)){ set_bit(JOB_AUTOWEP,&ai->flags); break; } if (!signal_pending(current)) { - schedule_timeout(ai->expires - jiffies); + unsigned long wake_at; + if (!ai->expires || !ai->scan_timeout) { + wake_at = max(ai->expires, + ai->scan_timeout); + } else { + wake_at = min(ai->expires, + ai->scan_timeout); + } + schedule_timeout(wake_at - jiffies); continue; } } else if (!signal_pending(current)) { @@ -2970,6 +3095,10 @@ static int airo_thread(void *data) { airo_send_event(dev); else if (test_bit(JOB_AUTOWEP, &ai->flags)) timer_func(dev); + else if (test_bit(JOB_SCAN_RESULTS, &ai->flags)) + airo_process_scan_results(ai); + else /* Shouldn't get here, but we make sure to unlock */ + up(&ai->sem); } complete_and_exit (&ai->thr_exited, 0); } @@ -3064,19 +3193,15 @@ static irqreturn_t airo_interrupt ( int irq, void* dev_id, struct pt_regs *regs) * and reassociations as valid status * Jean II */ if(newStatus == ASSOCIATED) { - if (apriv->scan_timestamp) { - /* Send an empty event to user space. - * We don't send the received data on - * the event because it would require - * us to do complex transcoding, and - * we want to minimise the work done in - * the irq handler. Use a request to - * extract the data - Jean II */ - wrqu.data.length = 0; - wrqu.data.flags = 0; - wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); - apriv->scan_timestamp = 0; +#if 0 + /* FIXME: Grabbing scan results here + * seems to be too early??? Just wait for + * timeout instead. */ + if (apriv->scan_timeout > 0) { + set_bit(JOB_SCAN_RESULTS, &apriv->flags); + wake_up_interruptible(&apriv->thr_wait); } +#endif if (down_trylock(&apriv->sem) != 0) { set_bit(JOB_EVENT, &apriv->flags); wake_up_interruptible(&apriv->thr_wait); @@ -6992,6 +7117,7 @@ static int airo_set_scan(struct net_device *dev, struct airo_info *ai = dev->priv; Cmd cmd; Resp rsp; + int wake = 0; /* Note : you may have realised that, as this is a SET operation, * this is privileged and therefore a normal user can't @@ -7001,17 +7127,25 @@ static int airo_set_scan(struct net_device *dev, * Jean II */ if (ai->flags & FLAG_RADIO_MASK) return -ENETDOWN; + if (down_interruptible(&ai->sem)) + return -ERESTARTSYS; + + /* If there's already a scan in progress, don't + * trigger another one. */ + if (ai->scan_timeout > 0) + goto out; + /* Initiate a scan command */ memset(&cmd, 0, sizeof(cmd)); cmd.cmd=CMD_LISTBSS; - if (down_interruptible(&ai->sem)) - return -ERESTARTSYS; issuecommand(ai, &cmd, &rsp); - ai->scan_timestamp = jiffies; - up(&ai->sem); - - /* At this point, just return to the user. */ + ai->scan_timeout = RUN_AT(3*HZ); + wake = 1; +out: + up(&ai->sem); + if (wake) + wake_up_interruptible(&ai->thr_wait); return 0; } @@ -7131,59 +7265,38 @@ static int airo_get_scan(struct net_device *dev, char *extra) { struct airo_info *ai = dev->priv; - BSSListRid BSSList; - int rc; + BSSListElement *net; + int err = 0; char *current_ev = extra; - /* When we are associated again, the scan has surely finished. - * Just in case, let's make sure enough time has elapsed since - * we started the scan. - Javier */ - if(ai->scan_timestamp && time_before(jiffies,ai->scan_timestamp+3*HZ)) { - /* Important note : we don't want to block the caller - * until results are ready for various reasons. - * First, managing wait queues is complex and racy - * (there may be multiple simultaneous callers). - * Second, we grab some rtnetlink lock before comming - * here (in dev_ioctl()). - * Third, the caller can wait on the Wireless Event - * - Jean II */ + /* If a scan is in-progress, return -EAGAIN */ + if (ai->scan_timeout > 0) return -EAGAIN; - } - ai->scan_timestamp = 0; - - /* There's only a race with proc_BSSList_open(), but its - * consequences are begnign. So I don't bother fixing it - Javier */ - /* Try to read the first entry of the scan result */ - rc = PC4500_readrid(ai, RID_BSSLISTFIRST, &BSSList, sizeof(BSSList), 1); - if((rc) || (BSSList.index == 0xffff)) { - /* Client error, no scan results... - * The caller need to restart the scan. */ - return -ENODATA; - } + if (down_interruptible(&ai->sem)) + return -EAGAIN; - /* Read and parse all entries */ - while((!rc) && (BSSList.index != 0xffff)) { + list_for_each_entry (net, &ai->network_list, list) { /* Translate to WE format this entry */ current_ev = airo_translate_scan(dev, current_ev, extra + dwrq->length, - &BSSList); + &net->bss); /* Check if there is space for one more entry */ if((extra + dwrq->length - current_ev) <= IW_EV_ADDR_LEN) { /* Ask user space to try again with a bigger buffer */ - return -E2BIG; + err = -E2BIG; + goto out; } - - /* Read next entry */ - rc = PC4500_readrid(ai, RID_BSSLISTNEXT, - &BSSList, sizeof(BSSList), 1); } + /* Length of data */ dwrq->length = (current_ev - extra); dwrq->flags = 0; /* todo */ - return 0; +out: + up(&ai->sem); + return err; } /*------------------------------------------------------------------*/ |