/* * Host AP (software wireless LAN access point) driver for * Intersil Prism2/2.5/3. * * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen * * Copyright (c) 2002-2005, Jouni Malinen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. See README and COPYING for * more details. * * FIX: * - there is currently no way of associating TX packets to correct wds device * when TX Exc/OK event occurs, so all tx_packets and some * tx_errors/tx_dropped are added to the main netdevice; using sw_support * field in txdesc might be used to fix this (using Alloc event to increment * tx_packets would need some further info in txfid table) * * Buffer Access Path (BAP) usage: * Prism2 cards have two separate BAPs for accessing the card memory. These * should allow concurrent access to two different frames and the driver * previously used BAP0 for sending data and BAP1 for receiving data. * However, there seems to be number of issues with concurrent access and at * least one know hardware bug in using BAP0 and BAP1 concurrently with PCI * Prism2.5. Therefore, the driver now only uses BAP0 for moving data between * host and card memories. BAP0 accesses are protected with local->baplock * (spin_lock_bh) to prevent concurrent use. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "hostap_80211.h" #include "hostap.h" #include "hostap_ap.h" /* #define final_version */ static int mtu = 1500; module_param(mtu, int, 0444); MODULE_PARM_DESC(mtu, "Maximum transfer unit"); static int channel[MAX_PARM_DEVICES] = { 3, DEF_INTS }; module_param_array(channel, int, NULL, 0444); MODULE_PARM_DESC(channel, "Initial channel"); static char essid[33] = "test"; module_param_string(essid, essid, sizeof(essid), 0444); MODULE_PARM_DESC(essid, "Host AP's ESSID"); static int iw_mode[MAX_PARM_DEVICES] = { IW_MODE_MASTER, DEF_INTS }; module_param_array(iw_mode, int, NULL, 0444); MODULE_PARM_DESC(iw_mode, "Initial operation mode"); static int beacon_int[MAX_PARM_DEVICES] = { 100, DEF_INTS }; module_param_array(beacon_int, int, NULL, 0444); MODULE_PARM_DESC(beacon_int, "Beacon interval (1 = 1024 usec)"); static int dtim_period[MAX_PARM_DEVICES] = { 1, DEF_INTS }; module_param_array(dtim_period, int, NULL, 0444); MODULE_PARM_DESC(dtim_period, "DTIM period"); static char dev_template[16] = "wlan%d"; module_param_string(dev_template, dev_template, sizeof(dev_template), 0444); MODULE_PARM_DESC(dev_template, "Prefix for network device name (default: " "wlan%d)"); #ifdef final_version #define EXTRA_EVENTS_WTERR 0 #else /* check WTERR events (Wait Time-out) in development versions */ #define EXTRA_EVENTS_WTERR HFA384X_EV_WTERR #endif /* Events that will be using BAP0 */ #define HFA384X_BAP0_EVENTS \ (HFA384X_EV_TXEXC | HFA384X_EV_RX | HFA384X_EV_INFO | HFA384X_EV_TX) /* event mask, i.e., events that will result in an interrupt */ #define HFA384X_EVENT_MASK \ (HFA384X_BAP0_EVENTS | HFA384X_EV_ALLOC | HFA384X_EV_INFDROP | \ HFA384X_EV_CMD | HFA384X_EV_TICK | \ EXTRA_EVENTS_WTERR) /* Default TX control flags: use 802.11 headers and request interrupt for * failed transmits. Frames that request ACK callback, will add * _TX_OK flag and _ALT_RTRY flag may be used to select different retry policy. */ #define HFA384X_TX_CTRL_FLAGS \ (HFA384X_TX_CTRL_802_11 | HFA384X_TX_CTRL_TX_EX) /* ca. 1 usec */ #define HFA384X_CMD_BUSY_TIMEOUT 5000 #define HFA384X_BAP_BUSY_TIMEOUT 50000 /* ca. 10 usec */ #define HFA384X_CMD_COMPL_TIMEOUT 20000 #define HFA384X_DL_COMPL_TIMEOUT 1000000 /* Wait times for initialization; yield to other processes to avoid busy * waiting for long time. */ #define HFA384X_INIT_TIMEOUT (HZ / 2) /* 500 ms */ #define HFA384X_ALLOC_COMPL_TIMEOUT (HZ / 20) /* 50 ms */ static void prism2_hw_reset(struct net_device *dev); static void prism2_check_sta_fw_version(local_info_t *local); #ifdef PRISM2_DOWNLOAD_SUPPORT /* hostap_download.c */ static int prism2_download_aux_dump(struct net_device *dev, unsigned int addr, int len, u8 *buf); static u8 * prism2_read_pda(struct net_device *dev); static int prism2_download(local_info_t *local, struct prism2_download_param *param); static void prism2_download_free_data(struct prism2_download_data *dl); static int prism2_download_volatile(local_info_t *local, struct prism2_download_data *param); static int prism2_download_genesis(local_info_t *local, struct prism2_download_data *param); static int prism2_get_ram_size(local_info_t *local); #endif /* PRISM2_DOWNLOAD_SUPPORT */ #ifndef final_version /* magic value written to SWSUPPORT0 reg. for detecting whether card is still * present */ #define HFA384X_MAGIC 0x8A32 #endif static u16 hfa384x_read_reg(struct net_device *dev, u16 reg) { return HFA384X_INW(reg); } static void hfa384x_read_regs(struct net_device *dev, struct hfa384x_regs *regs) { regs->cmd = HFA384X_INW(HFA384X_CMD_OFF); regs->evstat = HFA384X_INW(HFA384X_EVSTAT_OFF); regs->offset0 = HFA384X_INW(HFA384X_OFFSET0_OFF); regs->offset1 = HFA384X_INW(HFA384X_OFFSET1_OFF); regs->swsupport0 = HFA384X_INW(HFA384X_SWSUPPORT0_OFF); } /** * __hostap_cmd_queue_free - Free Prism2 command queue entry (private) * @local: pointer to private Host AP driver data * @entry: Prism2 command queue entry to be freed * @del_req: request the entry to be removed * * Internal helper function for freeing Prism2 command queue entries. * Caller must have acquired local->cmdlock before calling this function. */ static inline void __hostap_cmd_queue_free(local_info_t *local, struct hostap_cmd_queue *entry, int del_req) { if (del_req) { entry->del_req = 1; if (!list_empty(&entry->list)) { list_del_init(&entry->list); local->cmd_queue_len--; } } if (atomic_dec_and_test(&entry->usecnt) && entry->del_req) kfree(entry); } /** * hostap_cmd_queue_free - Free Prism2 command queue entry * @local: pointer to private Host AP driver data * @entry: Prism2 command queue entry to be freed * @del_req: request the entry to be removed * * Free a Prism2 command queue entry. */ static inline void hostap_cmd_queue_free(local_info_t *local, struct hostap_cmd_queue *entry, int del_req) { unsigned long flags; spin_lock_irqsave(&local->cmdlock, flags); __hostap_cmd_queue_free(local, entry, del_req); spin_unlock_irqrestore(&local->cmdlock, flags); } /** * prism2_clear_cmd_queue - Free all pending Prism2 command queue entries * @local: pointer to private Host AP driver data */ static void prism2_clear_cmd_queue(local_info_t *local) { struct list_head *ptr, *n; unsigned long flags; struct hostap_cmd_queue *entry; spin_lock_irqsave(&local->cmdlock, flags); list_for_each_safe(ptr, n, &local->cmd_queue) { entry = list_entry(ptr, struct hostap_cmd_queue, list); atomic_inc(&entry->usecnt); printk(KERN_DEBUG "%s: removed pending cmd_queue entry " "(type=%d, cmd=0x%04x, param0=0x%04x)\n", local->dev->name, entry->type, entry->cmd, entry->param0); __hostap_cmd_queue_free(local, entry, 1); } if (local->cmd_queue_len) { /* This should not happen; print debug message and clear * queue length. */ printk(KERN_DEBUG "%s: cmd_queue_len (%d) not zero after " "flush\n", local->dev->name, local->cmd_queue_len); local->cmd_queue_len = 0; } spin_unlock_irqrestore(&local->cmdlock, flags); } /** * hfa384x_cmd_issue - Issue a Prism2 command to the hardware * @dev: pointer to net_device * @entry: Prism2 command queue entry to be issued */ static int hfa384x_cmd_issue(struct net_device *dev, struct hostap_cmd_queue *entry) { struct hostap_interface *iface; local_info_t *local; int tries; u16 reg; unsigned long flags; iface = netdev_priv(dev); local = iface->local; if (local->func->card_present && !local->func->card_present(local)) return -ENODEV; if (entry->issued) { printk(KERN_DEBUG "%s: driver bug - re-issuing command @%p\n", dev->name, entry); } /* wait until busy bit is clear; this should always be clear since the * commands are serialized */ tries = HFA384X_CMD_BUSY_TIMEOUT; while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) { tries--; udelay(1); } #ifndef final_version if (tries != HFA384X_CMD_BUSY_TIMEOUT) { prism2_io_debug_error(dev, 1); printk(KERN_DEBUG "%s: hfa384x_cmd_issue: cmd reg was busy " "for %d usec\n", dev->name, HFA384X_CMD_BUSY_TIMEOUT - tries); } #endif if (tries == 0) { reg = HFA384X_INW(HFA384X_CMD_OFF); prism2_io_debug_error(dev, 2); printk(KERN_DEBUG "%s: hfa384x_cmd_issue - timeout - " "reg=0x%04x\n", dev->name, reg); return -ETIMEDOUT; } /* write command */ spin_lock_irqsave(&local->cmdlock, flags); HFA384X_OUTW(entry->param0, HFA384X_PARAM0_OFF); HFA384X_OUTW(entry->param1, HFA384X_PARAM1_OFF); HFA384X_OUTW(entry->cmd, HFA384X_CMD_OFF); entry->issued = 1; spin_unlock_irqrestore(&local->cmdlock, flags); return 0; } /** * hfa384x_cmd - Issue a Prism2 command and wait (sleep) for completion * @dev: pointer to net_device * @cmd: Prism2 command code (HFA384X_CMD_CODE_*) * @param0: value for Param0 register * @param1: value for Param1 register (pointer; %NULL if not used) * @resp0: pointer for Resp0 data or %NULL if Resp0 is not needed * * Issue given command (possibly after waiting in command queue) and sleep * until the command is completed (or timed out or interrupted). This can be * called only from user process context. */ static int hfa384x_cmd(struct net_device *dev, u16 cmd, u16 param0, u16 *param1, u16 *resp0) { struct hostap_interface *iface; local_info_t *local; int err, res, issue, issued = 0; unsigned long flags; struct hostap_cmd_queue *entry; DECLARE_WAITQUEUE(wait, current); iface = netdev_priv(dev); local = iface->local; if (in_interrupt()) { printk(KERN_DEBUG "%s: hfa384x_cmd called from interrupt " "context\n", dev->name); return -1; } if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN) { printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n", dev->name); return -1; } if (signal_pending(current)) return -EINTR; entry = kzalloc(sizeof(*entry), GFP_ATOMIC); if (entry == NULL) return -ENOMEM; atomic_set(&entry->usecnt, 1); entry->type = CMD_SLEEP; entry->cmd = cmd; entry->param0 = param0; if (param1) entry->param1 = *param1; init_waitqueue_head(&entry->compl); /* prepare to wait for command completion event, but do not sleep yet */ add_wait_queue(&entry->compl, &wait); set_current_state(TASK_INTERRUPTIBLE); spin_lock_irqsave(&local->cmdlock, flags); issue = list_empty(&local->cmd_queue); if (issue) entry->issuing = 1; list_add_tail(&entry->list, &local->cmd_queue); local->cmd_queue_len++; spin_unlock_irqrestore(&local->cmdlock, flags); err = 0; if (!issue) goto wait_completion; if (signal_pending(current)) err = -EINTR; if (!err) { if (hfa384x_cmd_issue(dev, entry)) err = -ETIMEDOUT; else issued = 1; } wait_completion: if (!err && entry->type != CMD_COMPLETED) { /* sleep until command is completed or timed out */ res = schedule_timeout(2 * HZ); } else res = -1; if (!err && signal_pending(current)) err = -EINTR; if (err && issued) { /* the command was issued, so a CmdCompl event should occur * soon; however, there's a pending signal and * schedule_timeout() would be interrupted; wait a short period * of time to avoid removing entry from the list before * CmdCompl event */ udelay(300); } set_current_state(TASK_RUNNING); remove_wait_queue(&entry->compl, &wait); /* If entry->list is still in the list, it must be removed * first and in this case prism2_cmd_ev() does not yet have * local reference to it, and the data can be kfree()'d * here. If the command completion event is still generated, * it will be assigned to next (possibly) pending command, but * the driver will reset the card anyway due to timeout * * If the entry is not in the list prism2_cmd_ev() has a local * reference to it, but keeps cmdlock as long as the data is * needed, so the data can be kfree()'d here. */ /* FIX: if the entry->list is in the list, it has not been completed * yet, so removing it here is somewhat wrong.. this could cause * references to freed memory and next list_del() causing NULL pointer * dereference.. it would probably be better to leave the entry in the * list and the list should be emptied during hw reset */ spin_lock_irqsave(&local->cmdlock, flags); if (!list_empty(&entry->list)) { printk(KERN_DEBUG "%s: hfa384x_cmd: entry still in list? " "(entry=%p, type=%d, res=%d)\n", dev->name, entry, entry->type, res); list_del_init(&entry->list); local->cmd_queue_len--; } spin_unlock_irqrestore(&local->cmdlock, flags); if (err) { printk(KERN_DEBUG "%s: hfa384x_cmd: interrupted; err=%d\n", dev->name, err); res = err; goto done; } if (entry->type != CMD_COMPLETED) { u16 reg = HFA384X_INW(HFA384X_EVSTAT_OFF); printk(KERN_DEBUG "%s: hfa384x_cmd: command was not " "completed (res=%d, entry=%p, type=%d, cmd=0x%04x, " "param0=0x%04x, EVSTAT=%04x INTEN=%04x)\n", dev->name, res, entry, entry->type, entry->cmd, entry->param0, reg, HFA384X_INW(HFA384X_INTEN_OFF)); if (reg & HFA384X_EV_CMD) { /* Command completion event is pending, but the * interrupt was not delivered - probably an issue * with pcmcia-cs configuration. */ printk(KERN_WARNING "%s: interrupt delivery does not " "seem to work\n", dev->name); } prism2_io_debug_error(dev, 3); res = -ETIMEDOUT; goto done; } if (resp0 != NULL) *resp0 = entry->resp0; #ifndef final_version if (entry->res) { printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x, " "resp0=0x%04x\n", dev->name, cmd, entry->res, entry->resp0); } #endif /* final_version */ res = entry->res; done: hostap_cmd_queue_free(local, entry, 1); return res; } /** * hfa384x_cmd_callback - Issue a Prism2 command; callback when completed * @dev: pointer to net_device * @cmd: Prism2 command code (HFA384X_CMD_CODE_*) * @param0: value for Param0 register * @callback: command completion callback function (%NULL = no callback) * @context: context data to be given to the callback function * * Issue given command (possibly after waiting in command queue) and use * callback function to indicate command completion. This can be called both * from user and interrupt context. The callback function will be called in * hardware IRQ context. It can be %NULL, when no function is called when * command is completed. */ static int hfa384x_cmd_callback(struct net_device *dev, u16 cmd, u16 param0, void (*callback)(struct net_device *dev, long context, u16 resp0, u16 status), long context) { struct hostap_interface *iface; local_info_t *local; int issue, ret; unsigned long flags; struct hostap_cmd_queue *entry; iface = netdev_priv(dev); local = iface->local; if (local->cmd_queue_len >= HOSTAP_CMD_QUEUE_MAX_LEN + 2) { printk(KERN_DEBUG "%s: hfa384x_cmd: cmd_queue full\n", dev->name); return -1; } entry = kzalloc(sizeof(*entry), GFP_ATOMIC); if (entry == NULL) return -ENOMEM; atomic_set(&entry->usecnt, 1); entry->type = CMD_CALLBACK; entry->cmd = cmd; entry->param0 = param0; entry->callback = callback; entry->context = context; spin_lock_irqsave(&local->cmdlock, flags); issue = list_empty(&local->cmd_queue); if (issue) entry->issuing = 1; list_add_tail(&entry->list, &local->cmd_queue); local->cmd_queue_len++; spin_unlock_irqrestore(&local->cmdlock, flags); if (issue && hfa384x_cmd_issue(dev, entry)) ret = -ETIMEDOUT; else ret = 0; hostap_cmd_queue_free(local, entry, ret); return ret; } /** * __hfa384x_cmd_no_wait - Issue a Prism2 command (private) * @dev: pointer to net_device * @cmd: Prism2 command code (HFA384X_CMD_CODE_*) * @param0: value for Param0 register * @io_debug_num: I/O debug error number * * Shared helper function for hfa384x_cmd_wait() and hfa384x_cmd_no_wait(). */ static int __hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0, int io_debug_num) { int tries; u16 reg; /* wait until busy bit is clear; this should always be clear since the * commands are serialized */ tries = HFA384X_CMD_BUSY_TIMEOUT; while (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY && tries > 0) { tries--; udelay(1); } if (tries == 0) { reg = HFA384X_INW(HFA384X_CMD_OFF); prism2_io_debug_error(dev, io_debug_num); printk(KERN_DEBUG "%s: __hfa384x_cmd_no_wait(%d) - timeout - " "reg=0x%04x\n", dev->name, io_debug_num, reg); return -ETIMEDOUT; } /* write command */ HFA384X_OUTW(param0, HFA384X_PARAM0_OFF); HFA384X_OUTW(cmd, HFA384X_CMD_OFF); return 0; } /** * hfa384x_cmd_wait - Issue a Prism2 command and busy wait for completion * @dev: pointer to net_device * @cmd: Prism2 command code (HFA384X_CMD_CODE_*) * @param0: value for Param0 register */ static int hfa384x_cmd_wait(struct net_device *dev, u16 cmd, u16 param0) { int res, tries; u16 reg; res = __hfa384x_cmd_no_wait(dev, cmd, param0, 4); if (res) return res; /* wait for command completion */ if ((cmd & HFA384X_CMDCODE_MASK) == HFA384X_CMDCODE_DOWNLOAD) tries = HFA384X_DL_COMPL_TIMEOUT; else tries = HFA384X_CMD_COMPL_TIMEOUT; while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) && tries > 0) { tries--; udelay(10); } if (tries == 0) { reg = HFA384X_INW(HFA384X_EVSTAT_OFF); prism2_io_debug_error(dev, 5); printk(KERN_DEBUG "%s: hfa384x_cmd_wait - timeout2 - " "reg=0x%04x\n", dev->name, reg); return -ETIMEDOUT; } res = (HFA384X_INW(HFA384X_STATUS_OFF) & (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) | BIT(8))) >> 8; #ifndef final_version if (res) { printk(KERN_DEBUG "%s: CMD=0x%04x => res=0x%02x\n", dev->name, cmd, res); } #endif HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF); return res; } /** * hfa384x_cmd_no_wait - Issue a Prism2 command; do not wait for completion * @dev: pointer to net_device * @cmd: Prism2 command code (HFA384X_CMD_CODE_*) * @param0: value for Param0 register */ static inline int hfa384x_cmd_no_wait(struct net_device *dev, u16 cmd, u16 param0) { return __hfa384x_cmd_no_wait(dev, cmd, param0, 6); } /** * prism2_cmd_ev - Prism2 command completion event handler * @dev: pointer to net_device * * Interrupt handler for command completion events. Called by the main * interrupt handler in hardware IRQ context. Read Resp0 and status registers * from the hardware and ACK the event. Depending on the issued command type * either wake up the sleeping process that is waiting for command completion * or call the callback function. Issue the next command, if one is pending. */ static void prism2_cmd_ev(struct net_device *dev) { struct hostap_interface *iface; local_info_t *local; struct hostap_cmd_queue *entry = NULL; iface = netdev_priv(dev); local = iface->local; spin_lock(&local->cmdlock); if (!list_empty(&local->cmd_queue)) { entry = list_entry(local->cmd_queue.next, struct hostap_cmd_queue, list); atomic_inc(&entry->usecnt); list_del_init(&entry->list); local->cmd_queue_len--; if (!entry->issued) { printk(KERN_DEBUG "%s: Command completion event, but " "cmd not issued\n", dev->name); __hostap_cmd_queue_free(local, entry, 1); entry = NULL; } } spin_unlock(&local->cmdlock); if (!entry) { HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF); printk(KERN_DEBUG "%s: Command completion event, but no " "pending commands\n", dev->name); return; } entry->resp0 = HFA384X_INW(HFA384X_RESP0_OFF); entry->res = (HFA384X_INW(HFA384X_STATUS_OFF) & (BIT(14) | BIT(13) | BIT(12) | BIT(11) | BIT(10) | BIT(9) | BIT(8))) >> 8; HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF); /* TODO: rest of the CmdEv handling could be moved to tasklet */ if (entry->type == CMD_SLEEP) { entry->type = CMD_COMPLETED; wake_up_interruptible(&entry->compl); } else if (entry->type == CMD_CALLBACK) { if (entry->callback) entry->callback(dev, entry->context, entry->resp0, entry->res); } else { printk(KERN_DEBUG "%s: Invalid command completion type %d\n", dev->name, entry->type); } hostap_cmd_queue_free(local, entry, 1); /* issue next command, if pending */ entry = NULL; spin_lock(&local->cmdlock); if (!list_empty(&local->cmd_queue)) { entry = list_entry(local->cmd_queue.next, struct hostap_cmd_queue, list); if (entry->issuing) { /* hfa384x_cmd() has already started issuing this * command, so do not start here */ entry = NULL; } if (entry) atomic_inc(&entry->usecnt); } spin_unlock(&local->cmdlock); if (entry) { /* issue next command; if command issuing fails, remove the * entry from cmd_queue */ int res = hfa384x_cmd_issue(dev, entry); spin_lock(&local->cmdlock); __hostap_cmd_queue_free(local, entry, res); spin_unlock(&local->cmdlock); } } static int hfa384x_wait_offset(struct net_device *dev, u16 o_off) { int tries = HFA384X_BAP_BUSY_TIMEOUT; int res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY; while (res && tries > 0) { tries--; udelay(1); res = HFA384X_INW(o_off) & HFA384X_OFFSET_BUSY; } return res; } /* Offset must be even */ static int hfa384x_setup_bap(struct net_device *dev, u16 bap, u16 id, int offset) { u16 o_off, s_off; int ret = 0; if (offset % 2 || bap > 1) return -EINVAL; if (bap == BAP1) { o_off = HFA384X_OFFSET1_OFF; s_off = HFA384X_SELECT1_OFF; } else { o_off = HFA384X_OFFSET0_OFF; s_off = HFA384X_SELECT0_OFF; } if (hfa384x_wait_offset(dev, o_off)) { prism2_io_debug_error(dev, 7); printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout before\n", dev->name); ret = -ETIMEDOUT; goto out; } HFA384X_OUTW(id, s_off); HFA384X_OUTW(offset, o_off); if (hfa384x_wait_offset(dev, o_off)) { prism2_io_debug_error(dev, 8); printk(KERN_DEBUG "%s: hfa384x_setup_bap - timeout after\n", dev->name); ret = -ETIMEDOUT; goto out; } #ifndef final_version if (HFA384X_INW(o_off) & HFA384X_OFFSET_ERR) { prism2_io_debug_error(dev, 9); printk(KERN_DEBUG "%s: hfa384x_setup_bap - offset error " "(%d,0x04%x,%d); reg=0x%04x\n", dev->name, bap, id, offset, HFA384X_INW(o_off)); ret = -EINVAL; } #endif out: return ret; } static int hfa384x_get_rid(struct net_device *dev, u16 rid, void *buf, int len, int exact_len) { struct hostap_interface *iface; local_info_t *local; int res, rlen = 0; struct hfa384x_rid_hdr rec; iface = netdev_priv(dev); local = iface->local; if (local->no_pri) { printk(KERN_DEBUG "%s: cannot get RID %04x (len=%d) - no PRI " "f/w\n", dev->name, rid, len); return -ENOTTY; /* Well.. not really correct, but return * something unique enough.. */ } if ((local->func->card_present && !local->func->card_present(local)) || local->hw_downloading) return -ENODEV; res = mutex_lock_interruptible(&local->rid_bap_mtx); if (res) return res; res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS, rid, NULL, NULL); if (res) { printk(KERN_DEBUG "%s: hfa384x_get_rid: CMDCODE_ACCESS failed " "(res=%d, rid=%04x, len=%d)\n", dev->name, res, rid, len); mutex_unlock(&local->rid_bap_mtx); return res; } spin_lock_bh(&local->baplock); res = hfa384x_setup_bap(dev, BAP0, rid, 0); if (!res) res = hfa384x_from_bap(dev, BAP0, &rec, sizeof(rec)); if (le16_to_cpu(rec.len) == 0) { /* RID not available */ res = -ENODATA; } rlen = (le16_to_cpu(rec.len) - 1) * 2; if (!res && exact_len && rlen != len) { printk(KERN_DEBUG "%s: hfa384x_get_rid - RID len mismatch: " "rid=0x%04x, len=%d (expected %d)\n", dev->name, rid, rlen, len); res = -ENODATA; } if (!res) res = hfa384x_from_bap(dev, BAP0, buf, len); spin_unlock_bh(&local->baplock); mutex_unlock(&local->rid_bap_mtx); if (res) { if (res != -ENODATA) printk(KERN_DEBUG "%s: hfa384x_get_rid (rid=%04x, " "len=%d) - failed - res=%d\n", dev->name, rid, len, res); if (res == -ETIMEDOUT) prism2_hw_reset(dev); return res; } return rlen; } static int hfa384x_set_rid(struct net_device *dev, u16 rid, void *buf, int len) { struct hostap_interface *iface; local_info_t *local; struct hfa384x_rid_hdr rec; int res; iface = netdev_priv(dev); local = iface->local; if (local->no_pri) { printk(KERN_DEBUG "%s: cannot set RID %04x (len=%d) - no PRI " "f/w\n", dev->name, rid, len); return -ENOTTY; /* Well.. not really correct, but return * something unique enough.. */ } if ((local->func->card_present && !local->func->card_present(local)) || local->hw_downloading) return -ENODEV; rec.rid = cpu_to_le16(rid); /* RID len in words and +1 for rec.rid */ rec.len = cpu_to_le16(len / 2 + len % 2 + 1); res = mutex_lock_interruptible(&local->rid_bap_mtx); if (res) return res; spin_lock_bh(&local->baplock); res = hfa384x_setup_bap(dev, BAP0, rid, 0); if (!res) res = hfa384x_to_bap(dev, BAP0, &rec, sizeof(rec)); if (!res) res = hfa384x_to_bap(dev, BAP0, buf, len); spin_unlock_bh(&local->baplock); if (res) { printk(KERN_DEBUG "%s: hfa384x_set_rid (rid=%04x, len=%d) - " "failed - res=%d\n", dev->name, rid, len, res); mutex_unlock(&local->rid_bap_mtx); return res; } res = hfa384x_cmd(dev, HFA384X_CMDCODE_ACCESS_WRITE, rid, NULL, NULL); mutex_unlock(&local->rid_bap_mtx); if (res) { printk(KERN_DEBUG "%s: hfa384x_set_rid: CMDCODE_ACCESS_WRITE " "failed (res=%d, rid=%04x, len=%d)\n", dev->name, res, rid, len); if (res == -ETIMEDOUT) prism2_hw_reset(dev); } return res; } static void hfa384x_disable_interrupts(struct net_device *dev) { /* disable interrupts and clear event status */ HFA384X_OUTW(0, HFA384X_INTEN_OFF); HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF); } static void hfa384x_enable_interrupts(struct net_device *dev) { /* ack pending events and enable interrupts from selected events */ HFA384X_OUTW(0xffff, HFA384X_EVACK_OFF); HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF); } static void hfa384x_events_no_bap0(struct net_device *dev) { HFA384X_OUTW(HFA384X_EVENT_MASK & ~HFA384X_BAP0_EVENTS, HFA384X_INTEN_OFF); } static void hfa384x_events_all(struct net_device *dev) { HFA384X_OUTW(HFA384X_EVENT_MASK, HFA384X_INTEN_OFF); } static void hfa384x_events_only_cmd(struct net_device *dev) { HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_INTEN_OFF); } static u16 hfa384x_allocate_fid(struct net_device *dev, int len) { u16 fid; unsigned long delay; /* FIX: this could be replace with hfa384x_cmd() if the Alloc event * below would be handled like CmdCompl event (sleep here, wake up from * interrupt handler */ if (hfa384x_cmd_wait(dev, HFA384X_CMDCODE_ALLOC, len)) { printk(KERN_DEBUG "%s: cannot allocate fid, len=%d\n", dev->name, len); return 0xffff; } delay = jiffies + HFA384X_ALLOC_COMPL_TIMEOUT; while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC) && time_before(jiffies, delay)) yield(); if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_ALLOC)) { printk("%s: fid allocate, len=%d - timeout\n", dev->name, len); return 0xffff; } fid = HFA384X_INW(HFA384X_ALLOCFID_OFF); HFA384X_OUTW(HFA384X_EV_ALLOC, HFA384X_EVACK_OFF); return fid; } static int prism2_reset_port(struct net_device *dev) { struct hostap_interface *iface; local_info_t *local; int res; iface = netdev_priv(dev); local = iface->local; if (!local->dev_enabled) return 0; res = hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL); if (res) printk(KERN_DEBUG "%s: reset port failed to disable port\n", dev->name); else { res = hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL); if (res) printk(KERN_DEBUG "%s: reset port failed to enable " "port\n", dev->name); } /* It looks like at least some STA firmware versions reset * fragmentation threshold back to 2346 after enable command. Restore * the configured value, if it differs from this default. */ if (local->fragm_threshold != 2346 && hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD, local->fragm_threshold)) { printk(KERN_DEBUG "%s: failed to restore fragmentation " "threshold (%d) after Port0 enable\n", dev->name, local->fragm_threshold); } /* Some firmwares lose antenna selection settings on reset */ (void) hostap_set_antsel(local); return res; } static int prism2_get_version_info(struct net_device *dev, u16 rid, const char *txt) { struct hfa384x_comp_ident comp; struct hostap_interface *iface; local_info_t *local; iface = netdev_priv(dev); local = iface->local; if (local->no_pri) { /* PRI f/w not yet available - cannot read RIDs */ return -1; } if (hfa384x_get_rid(dev, rid, &comp, sizeof(comp), 1) < 0) { printk(KERN_DEBUG "Could not get RID for component %s\n", txt); return -1; } printk(KERN_INFO "%s: %s: id=0x%02x v%d.%d.%d\n", dev->name, txt, __le16_to_cpu(comp.id), __le16_to_cpu(comp.major), __le16_to_cpu(comp.minor), __le16_to_cpu(comp.variant)); return 0; } static int prism2_setup_rids(struct net_device *dev) { struct hostap_interface *iface; local_info_t *local; __le16 tmp; int ret = 0; iface = netdev_priv(dev); local = iface->local; hostap_set_word(dev, HFA384X_RID_TICKTIME, 2000); if (!local->fw_ap) { u16 tmp1 = hostap_get_porttype(local); ret = hostap_set_word(dev, HFA384X_RID_CNFPORTTYPE, tmp1); if (ret) { printk("%s: Port type setting to %d failed\n", dev->name, tmp1); goto fail; } } /* Setting SSID to empty string seems to kill the card in Host AP mode */ if (local->iw_mode != IW_MODE_MASTER || local->essid[0] != '\0') { ret = hostap_set_string(dev, HFA384X_RID_CNFOWNSSID, local->essid); if (ret) { printk("%s: AP own SSID setting failed\n", dev->name); goto fail; } } ret = hostap_set_word(dev, HFA384X_RID_CNFMAXDATALEN, PRISM2_DATA_MAXLEN); if (ret) { printk("%s: MAC data length setting to %d failed\n", dev->name, PRISM2_DATA_MAXLEN); goto fail; } if (hfa384x_get_rid(dev, HFA384X_RID_CHANNELLIST, &tmp, 2, 1) < 0) { printk("%s: Channel list read failed\n", dev->name); ret = -EINVAL; goto fail; } local->channel_mask = le16_to_cpu(tmp); if (local->channel < 1 || local->channel > 14 || !(local->channel_mask & (1 << (local->channel - 1)))) { printk(KERN_WARNING "%s: Channel setting out of range " "(%d)!\n", dev->name, local->channel); ret = -EBUSY; goto fail; } ret = hostap_set_word(dev, HFA384X_RID_CNFOWNCHANNEL, local->channel); if (ret) { printk("%s: Channel setting to %d failed\n", dev->name, local->channel); goto fail; } ret = hostap_set_word(dev, HFA384X_RID_CNFBEACONINT, local->beacon_int); if (ret) { printk("%s: Beacon interval setting to %d failed\n", dev->name, local->beacon_int); /* this may fail with Symbol/Lucent firmware */ if (ret == -ETIMEDOUT) goto fail; } ret = hostap_set_word(dev, HFA384X_RID_CNFOWNDTIMPERIOD, local->dtim_period); if (ret) { printk("%s: DTIM period setting to %d failed\n", dev->name, local->dtim_period); /* this may fail with Symbol/Lucent firmware */ if (ret == -ETIMEDOUT) goto fail; } ret = hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE, local->is_promisc); if (ret) printk(KERN_INFO "%s: Setting promiscuous mode (%d) failed\n", dev->name, local->is_promisc); if (!local->fw_ap) { ret = hostap_set_string(dev, HFA384X_RID_CNFDESIREDSSID, local->essid); if (ret) { printk("%s: Desired SSID setting failed\n", dev->name); goto fail; } } /* Setup TXRateControl, defaults to allow use of 1, 2, 5.5, and * 11 Mbps in automatic TX rate fallback and 1 and 2 Mbps as basic * rates */ if (local->tx_rate_control == 0) { local->tx_rate_control = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS | HFA384X_RATES_5MBPS | HFA384X_RATES_11MBPS; } if (local->basic_rates == 0) local->basic_rates = HFA384X_RATES_1MBPS | HFA384X_RATES_2MBPS; if (!local->fw_ap) { ret = hostap_set_word(dev, HFA384X_RID_TXRATECONTROL, local->tx_rate_control); if (ret) { printk("%s: TXRateControl setting to %d failed\n", dev->name, local->tx_rate_control); goto fail; } ret = hostap_set_word(dev, HFA384X_RID_CNFSUPPORTEDRATES, local->tx_rate_control); if (ret) { printk("%s: cnfSupportedRates setting to %d failed\n", dev->name, local->tx_rate_control); } ret = hostap_set_word(dev, HFA384X_RID_CNFBASICRATES, local->basic_rates); if (ret) { printk("%s: cnfBasicRates setting to %d failed\n", dev->name, local->basic_rates); } ret = hostap_set_word(dev, HFA384X_RID_CREATEIBSS, 1); if (ret) { printk("%s: Create IBSS setting to 1 failed\n", dev->name); } } if (local->name_set) (void) hostap_set_string(dev, HFA384X_RID_CNFOWNNAME, local->name); if (hostap_set_encryption(local)) { printk(KERN_INFO "%s: could not configure encryption\n", dev->name); } (void) hostap_set_antsel(local); if (hostap_set_roaming(local)) { printk(KERN_INFO "%s: could not set host roaming\n", dev->name); } if (local->sta_fw_ver >= PRISM2_FW_VER(1,6,3) && hostap_set_word(dev, HFA384X_RID_CNFENHSECURITY, local->enh_sec)) printk(KERN_INFO "%s: cnfEnhSecurity setting to 0x%x failed\n", dev->name, local->enh_sec); /* 32-bit tallies were added in STA f/w 0.8.0, but they were apparently * not working correctly (last seven counters report bogus values). * This has been fixed in 0.8.2, so enable 32-bit tallies only * beginning with that firmware version. Another bug fix for 32-bit * tallies in 1.4.0; should 16-bit tallies be used for some other * versions, too? */ if (local->sta_fw_ver >= PRISM2_FW_VER(0,8,2)) { if (hostap_set_word(dev, HFA384X_RID_CNFTHIRTY2TALLY, 1)) { printk(KERN_INFO "%s: cnfThirty2Tally setting " "failed\n", dev->name); local->tallies32 = 0; } else local->tallies32 = 1; } else local->tallies32 = 0; hostap_set_auth_algs(local); if (hostap_set_word(dev, HFA384X_RID_FRAGMENTATIONTHRESHOLD, local->fragm_threshold)) { printk(KERN_INFO "%s: setting FragmentationThreshold to %d " "failed\n", dev->name, local->fragm_threshold); } if (hostap_set_word(dev, HFA384X_RID_RTSTHRESHOLD, local->rts_threshold)) { printk(KERN_INFO "%s: setting RTSThreshold to %d failed\n", dev->name, local->rts_threshold); } if (local->manual_retry_count >= 0 && hostap_set_word(dev, HFA384X_RID_CNFALTRETRYCOUNT, local->manual_retry_count)) { printk(KERN_INFO "%s: setting cnfAltRetryCount to %d failed\n", dev->name, local->manual_retry_count); } if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1) && hfa384x_get_rid(dev, HFA384X_RID_CNFDBMADJUST, &tmp, 2, 1) == 2) { local->rssi_to_dBm = le16_to_cpu(tmp); } if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->wpa && hostap_set_word(dev, HFA384X_RID_SSNHANDLINGMODE, 1)) { printk(KERN_INFO "%s: setting ssnHandlingMode to 1 failed\n", dev->name); } if (local->sta_fw_ver >= PRISM2_FW_VER(1,7,0) && local->generic_elem && hfa384x_set_rid(dev, HFA384X_RID_GENERICELEMENT, local->generic_elem, local->generic_elem_len)) { printk(KERN_INFO "%s: setting genericElement failed\n", dev->name); } fail: return ret; } static int prism2_hw_init(struct net_device *dev, int initial) { struct hostap_interface *iface; local_info_t *local; int ret, first = 1; unsigned long start, delay; PDEBUG(DEBUG_FLOW, "prism2_hw_init()\n"); iface = netdev_priv(dev); local = iface->local; clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits); init: /* initialize HFA 384x */ ret = hfa384x_cmd_no_wait(dev, HFA384X_CMDCODE_INIT, 0); if (ret) { printk(KERN_INFO "%s: first command failed - assuming card " "does not have primary firmware\n", dev_info); } if (first && (HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) { /* EvStat has Cmd bit set in some cases, so retry once if no * wait was needed */ HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF); printk(KERN_DEBUG "%s: init command completed too quickly - " "retrying\n", dev->name); first = 0; goto init; } start = jiffies; delay = jiffies + HFA384X_INIT_TIMEOUT; while (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD) && time_before(jiffies, delay)) yield(); if (!(HFA384X_INW(HFA384X_EVSTAT_OFF) & HFA384X_EV_CMD)) { printk(KERN_DEBUG "%s: assuming no Primary image in " "flash - card initialization not completed\n", dev_info); local->no_pri = 1; #ifdef PRISM2_DOWNLOAD_SUPPORT if (local->sram_type == -1) local->sram_type = prism2_get_ram_size(local); #endif /* PRISM2_DOWNLOAD_SUPPORT */ return 1; } local->no_pri = 0; printk(KERN_DEBUG "prism2_hw_init: initialized in %lu ms\n", (jiffies - start) * 1000 / HZ); HFA384X_OUTW(HFA384X_EV_CMD, HFA384X_EVACK_OFF); return 0; } static int prism2_hw_init2(struct net_device *dev, int initial) { struct hostap_interface *iface; local_info_t *local; int i; iface = netdev_priv(dev); local = iface->local; #ifdef PRISM2_DOWNLOAD_SUPPORT kfree(local->pda); if (local->no_pri) local->pda = NULL; else local->pda = prism2_read_pda(dev); #endif /* PRISM2_DOWNLOAD_SUPPORT */ hfa384x_disable_interrupts(dev); #ifndef final_version HFA384X_OUTW(HFA384X_MAGIC, HFA384X_SWSUPPORT0_OFF); if (HFA384X_INW(HFA384X_SWSUPPORT0_OFF) != HFA384X_MAGIC) { printk("SWSUPPORT0 write/read failed: %04X != %04X\n", HFA384X_INW(HFA384X_SWSUPPORT0_OFF), HFA384X_MAGIC); goto failed; } #endif if (initial || local->pri_only) { hfa384x_events_only_cmd(dev); /* get card version information */ if (prism2_get_version_info(dev, HFA384X_RID_NICID, "NIC") || prism2_get_version_info(dev, HFA384X_RID_PRIID, "PRI")) { hfa384x_disable_interrupts(dev); goto failed; } if (prism2_get_version_info(dev, HFA384X_RID_STAID, "STA")) { printk(KERN_DEBUG "%s: Failed to read STA f/w version " "- only Primary f/w present\n", dev->name); local->pri_only = 1; return 0; } local->pri_only = 0; hfa384x_disable_interrupts(dev); } /* FIX: could convert allocate_fid to use sleeping CmdCompl wait and * enable interrupts before this. This would also require some sort of * sleeping AllocEv waiting */ /* allocate TX FIDs */ local->txfid_len = PRISM2_TXFID_LEN; for (i = 0; i < PRISM2_TXFID_COUNT; i++) { local->txfid[i] = hfa384x_allocate_fid(dev, local->txfid_len); if (local->txfid[i] == 0xffff && local->txfid_len > 1600) { local->txfid[i] = hfa384x_allocate_fid(dev, 1600); if (local->txfid[i] != 0xffff) { printk(KERN_DEBUG "%s: Using shorter TX FID " "(1600 bytes)\n", dev->name); local->txfid_len = 1600; } } if (local->txfid[i] == 0xffff) goto failed; local->intransmitfid[i] = PRISM2_TXFID_EMPTY; } hfa384x_events_only_cmd(dev); if (initial) { struct list_head *ptr; prism2_check_sta_fw_version(local); if (hfa384x_get_rid(dev, HFA384X_RID_CNFOWNMACADDR, dev->dev_addr, 6, 1) < 0) { printk("%s: could not get own MAC address\n", dev->name); } list_for_each(ptr, &local->hostap_interfaces) { iface = list_entry(ptr, struct hostap_interface, list); memcpy(iface->dev->dev_addr, dev->dev_addr, ETH_ALEN); } } else if (local->fw_ap) prism2_check_sta_fw_version(local); prism2_setup_rids(dev); /* MAC is now configured, but port 0 is not yet enabled */ return 0; failed: if (!local->no_pri) printk(KERN_WARNING "%s: Initialization failed\n", dev_info); return 1; } static int prism2_hw_enable(struct net_device *dev, int initial) { struct hostap_interface *iface; local_info_t *local; int was_resetting; iface = netdev_priv(dev); local = iface->local; was_resetting = local->hw_resetting; if (hfa384x_cmd(dev, HFA384X_CMDCODE_ENABLE, 0, NULL, NULL)) { printk("%s: MAC port 0 enabling failed\n", dev->name); return 1; } local->hw_ready = 1; local->hw_reset_tries = 0; local->hw_resetting = 0; hfa384x_enable_interrupts(dev); /* at least D-Link DWL-650 seems to require additional port reset * before it starts acting as an AP, so reset port automatically * here just in case */ if (initial && prism2_reset_port(dev)) { printk("%s: MAC port 0 resetting failed\n", dev->name); return 1; } if (was_resetting && netif_queue_stopped(dev)) { /* If hw_reset() was called during pending transmit, netif * queue was stopped. Wake it up now since the wlan card has * been resetted. */ netif_wake_queue(dev); } return 0; } static int prism2_hw_config(struct net_device *dev, int initial) { struct hostap_interface *iface; local_info_t *local; iface = netdev_priv(dev); local = iface->local; if (local->hw_downloading) return 1; if (prism2_hw_init(dev, initial)) { return local->no_pri ? 0 : 1; } if (prism2_hw_init2(dev, initial)) return 1; /* Enable firmware if secondary image is loaded and at least one of the * netdevices is up. */ if (!local->pri_only && (initial == 0 || (initial == 2 && local->num_dev_open > 0))) { if (!local->dev_enabled) prism2_callback(local, PRISM2_CALLBACK_ENABLE); local->dev_enabled = 1; return prism2_hw_enable(dev, initial); } return 0; } static void prism2_hw_shutdown(struct net_device *dev, int no_disable) { struct hostap_interface *iface; local_info_t *local; iface = netdev_priv(dev); local = iface->local; /* Allow only command completion events during disable */ hfa384x_events_only_cmd(dev); local->hw_ready = 0; if (local->dev_enabled) prism2_callback(local, PRISM2_CALLBACK_DISABLE); local->dev_enabled = 0; if (local->func->card_present && !local->func->card_present(local)) { printk(KERN_DEBUG "%s: card already removed or not configured " "during shutdown\n", dev->name); return; } if ((no_disable & HOSTAP_HW_NO_DISABLE) == 0 && hfa384x_cmd(dev, HFA384X_CMDCODE_DISABLE, 0, NULL, NULL)) printk(KERN_WARNING "%s: Shutdown failed\n", dev_info); hfa384x_disable_interrupts(dev); if (no_disable & HOSTAP_HW_ENABLE_CMDCOMPL) hfa384x_events_only_cmd(dev); else prism2_clear_cmd_queue(local); } static void prism2_hw_reset(struct net_device *dev) { struct hostap_interface *iface; local_info_t *local; #if 0 static long last_reset = 0; /* do not reset card more than once per second to avoid ending up in a * busy loop resetting the card */ if (time_before_eq(jiffies, last_reset + HZ)) return; last_reset = jiffies; #endif iface = netdev_priv(dev); local = iface->local; if (in_interrupt()) { printk(KERN_DEBUG "%s: driver bug - prism2_hw_reset() called " "in interrupt context\n", dev->name); return; } if (local->hw_downloading) return; if (local->hw_resetting) { printk(KERN_WARNING "%s: %s: already resetting card - " "ignoring reset request\n", dev_info, dev->name); return; } local->hw_reset_tries++; if (local->hw_reset_tries > 10) { printk(KERN_WARNING "%s: too many reset tries, skipping\n", dev->name); return; } printk(KERN_WARNING "%s: %s: resetting card\n", dev_info, dev->name); hfa384x_disable_interrupts(dev); local->hw_resetting = 1; if (local->func->cor_sreset) { /* Host system seems to hang in some cases with high traffic * load or shared interrupts during COR sreset. Disable shared * interrupts during reset to avoid these crashes. COS sreset * takes quite a long time, so it is unfortunate that this * seems to be needed. Anyway, I do not know of any better way * of avoiding the crash. */ disable_irq(dev->irq); local->func->cor_sreset(local); enable_irq(dev->irq); } prism2_hw_shutdown(dev, 1); prism2_hw_config(dev, 0); local->hw_resetting = 0; #ifdef PRISM2_DOWNLOAD_SUPPORT if (local->dl_pri) { printk(KERN_DEBUG "%s: persistent download of primary " "firmware\n", dev->name); if (prism2_download_genesis(local, local->dl_pri) < 0) printk(KERN_WARNING "%s: download (PRI) failed\n", dev->name); } if (local->dl_sec) { printk(KERN_DEBUG "%s: persistent download of secondary " "firmware\n", dev->name); if (prism2_download_volatile(local, local->dl_sec) < 0) printk(KERN_WARNING "%s: download (SEC) failed\n", dev->name); } #endif /* PRISM2_DOWNLOAD_SUPPORT */ /* TODO: restore beacon TIM bits for STAs that have buffered frames */ } static void prism2_schedule_reset(local_info_t *local) { schedule_work(&local->reset_queue); } /* Called only as scheduled task after noticing card timeout in interrupt * context */ static void handle_reset_queue(struct work_struct *work) { local_info_t *local = container_of(work, local_info_t, reset_queue); printk(KERN_DEBUG "%s: scheduled card reset\n", local->dev->name); prism2_hw_reset(local->dev); if (netif_queue_stopped(local->dev)) { int i; for (i = 0; i < PRISM2_TXFID_COUNT; i++) if (local->intransmitfid[i] == PRISM2_TXFID_EMPTY) { PDEBUG(DEBUG_EXTRA, "prism2_tx_timeout: " "wake up queue\n"); netif_wake_queue(local->dev); break; } } } static int prism2_get_txfid_idx(local_info_t *local) { int idx, end; unsigned long flags; spin_lock_irqsave(&local->txfidlock, flags); end = idx = local->next_txfid; do { if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) { local->intransmitfid[idx] = PRISM2_TXFID_RESERVED; spin_unlock_irqrestore(&local->txfidlock, flags); return idx; } idx++; if (idx >= PRISM2_TXFID_COUNT) idx = 0; } while (idx != end); spin_unlock_irqrestore(&local->txfidlock, flags); PDEBUG(DEBUG_EXTRA2, "prism2_get_txfid_idx: no room in txfid buf: " "packet dropped\n"); local->dev->stats.tx_dropped++; return -1; } /* Called only from hardware IRQ */ static void prism2_transmit_cb(struct net_device *dev, long context, u16 resp0, u16 res) { struct hostap_interface *iface; local_info_t *local; int idx = (int) context; iface = netdev_priv(dev); local = iface->local; if (res) { printk(KERN_DEBUG "%s: prism2_transmit_cb - res=0x%02x\n", dev->name, res); return; } if (idx < 0 || idx >= PRISM2_TXFID_COUNT) { printk(KERN_DEBUG "%s: prism2_transmit_cb called with invalid " "idx=%d\n", dev->name, idx); return; } if (!test_and_clear_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) { printk(KERN_DEBUG "%s: driver bug: prism2_transmit_cb called " "with no pending transmit\n", dev->name); } if (netif_queue_stopped(dev)) { /* ready for next TX, so wake up queue that was stopped in * prism2_transmit() */ netif_wake_queue(dev); } spin_lock(&local->txfidlock); /* With reclaim, Resp0 contains new txfid for transmit; the old txfid * will be automatically allocated for the next TX frame */ local->intransmitfid[idx] = resp0; PDEBUG(DEBUG_FID, "%s: prism2_transmit_cb: txfid[%d]=0x%04x, " "resp0=0x%04x, transmit_txfid=0x%04x\n", dev->name, idx, local->txfid[idx], resp0, local->intransmitfid[local->next_txfid]); idx++; if (idx >= PRISM2_TXFID_COUNT) idx = 0; local->next_txfid = idx; /* check if all TX buffers are occupied */ do { if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) { spin_unlock(&local->txfidlock); return; } idx++; if (idx >= PRISM2_TXFID_COUNT) idx = 0; } while (idx != local->next_txfid); spin_unlock(&local->txfidlock); /* no empty TX buffers, stop queue */ netif_stop_queue(dev); } /* Called only from software IRQ if PCI bus master is not used (with bus master * this can be called both from software and hardware IRQ) */ static int prism2_transmit(struct net_device *dev, int idx) { struct hostap_interface *iface; local_info_t *local; int res; iface = netdev_priv(dev); local = iface->local; /* The driver tries to stop netif queue so that there would not be * more than one attempt to transmit frames going on; check that this * is really the case */ if (test_and_set_bit(HOSTAP_BITS_TRANSMIT, &local->bits)) { printk(KERN_DEBUG "%s: driver bug - prism2_transmit() called " "when previous TX was pending\n", dev->name); return -1; } /* stop the queue for the time that transmit is pending */ netif_stop_queue(dev); /* transmit packet */ res = hfa384x_cmd_callback( dev, HFA384X_CMDCODE_TRANSMIT | HFA384X_CMD_TX_RECLAIM, local->txfid[idx], prism2_transmit_cb, (long) idx); if (res) { printk(KERN_DEBUG "%s: prism2_transmit: CMDCODE_TRANSMIT " "failed (res=%d)\n", dev->name, res); dev->stats.tx_dropped++; netif_wake_queue(dev); return -1; } dev->trans_start = jiffies; /* Since we did not wait for command completion, the card continues * to process on the background and we will finish handling when * command completion event is handled (prism2_cmd_ev() function) */ return 0; } /* Send IEEE 802.11 frame (convert the header into Prism2 TX descriptor and * send the payload with this descriptor) */ /* Called only from software IRQ */ static int prism2_tx_80211(struct sk_buff *skb, struct net_device *dev) { struct hostap_interface *iface; local_info_t *local; struct hfa384x_tx_frame txdesc; struct hostap_skb_tx_data *meta; int hdr_len, data_len, idx, res, ret = -1; u16 tx_control, fc; iface = netdev_priv(dev); local = iface->local; meta = (struct hostap_skb_tx_data *) skb->cb; prism2_callback(local, PRISM2_CALLBACK_TX_START); if ((local->func->card_present && !local->func->card_present(local)) || !local->hw_ready || local->hw_downloading || local->pri_only) { if (net_ratelimit()) { printk(KERN_DEBUG "%s: prism2_tx_80211: hw not ready -" " skipping\n", dev->name); } goto fail; } memset(&txdesc, 0, sizeof(txdesc)); /* skb->data starts with txdesc->frame_control */ hdr_len = 24; skb_copy_from_linear_data(skb, &txdesc.frame_control, hdr_len); fc = le16_to_cpu(txdesc.frame_control); if (ieee80211_is_data(txdesc.frame_control) && ieee80211_has_a4(txdesc.frame_control) && skb->len >= 30) { /* Addr4 */ skb_copy_from_linear_data_offset(skb, hdr_len, txdesc.addr4, ETH_ALEN); hdr_len += ETH_ALEN; } tx_control = local->tx_control; if (meta->tx_cb_idx) { tx_control |= HFA384X_TX_CTRL_TX_OK; txdesc.sw_support = cpu_to_le32(meta->tx_cb_idx); } txdesc.tx_control = cpu_to_le16(tx_control); txdesc.tx_rate = meta->rate; data_len = skb->len - hdr_len; txdesc.data_len = cpu_to_le16(data_len); txdesc.len = cpu_to_be16(data_len); idx = prism2_get_txfid_idx(local); if (idx < 0) goto fail; if (local->frame_dump & PRISM2_DUMP_TX_HDR) hostap_dump_tx_header(dev->name, &txdesc); spin_lock(&local->baplock); res = hfa384x_setup_bap(dev, BAP0, local->txfid[idx], 0); if (!res) res = hfa384x_to_bap(dev, BAP0, &txdesc, sizeof(txdesc)); if (!res) res = hfa384x_to_bap(dev, BAP0, skb->data + hdr_len, skb->len - hdr_len); spin_unlock(&local->baplock); if (!res) res = prism2_transmit(dev, idx); if (res) { printk(KERN_DEBUG "%s: prism2_tx_80211 - to BAP0 failed\n", dev->name); local->intransmitfid[idx] = PRISM2_TXFID_EMPTY; schedule_work(&local->reset_queue); goto fail; } ret = 0; fail: prism2_callback(local, PRISM2_CALLBACK_TX_END); return ret; } /* Some SMP systems have reported number of odd errors with hostap_pci. fid * register has changed values between consecutive reads for an unknown reason. * This should really not happen, so more debugging is needed. This test * version is a bit slower, but it will detect most of such register changes * and will try to get the correct fid eventually. */ #define EXTRA_FID_READ_TESTS static u16 prism2_read_fid_reg(struct net_device *dev, u16 reg) { #ifdef EXTRA_FID_READ_TESTS u16 val, val2, val3; int i; for (i = 0; i < 10; i++) { val = HFA384X_INW(reg); val2 = HFA384X_INW(reg); val3 = HFA384X_INW(reg); if (val == val2 && val == val3) return val; printk(KERN_DEBUG "%s: detected fid change (try=%d, reg=%04x):" " %04x %04x %04x\n", dev->name, i, reg, val, val2, val3); if ((val == val2 || val == val3) && val != 0) return val; if (val2 == val3 && val2 != 0) return val2; } printk(KERN_WARNING "%s: Uhhuh.. could not read good fid from reg " "%04x (%04x %04x %04x)\n", dev->name, reg, val, val2, val3); return val; #else /* EXTRA_FID_READ_TESTS */ return HFA384X_INW(reg); #endif /* EXTRA_FID_READ_TESTS */ } /* Called only as a tasklet (software IRQ) */ static void prism2_rx(local_info_t *local) { struct net_device *dev = local->dev; int res, rx_pending = 0; u16 len, hdr_len, rxfid, status, macport; struct hfa384x_rx_frame rxdesc; struct sk_buff *skb = NULL; prism2_callback(local, PRISM2_CALLBACK_RX_START); rxfid = prism2_read_fid_reg(dev, HFA384X_RXFID_OFF); #ifndef final_version if (rxfid == 0) { rxfid = HFA384X_INW(HFA384X_RXFID_OFF); printk(KERN_DEBUG "prism2_rx: rxfid=0 (next 0x%04x)\n", rxfid); if (rxfid == 0) { schedule_work(&local->reset_queue); goto rx_dropped; } /* try to continue with the new rxfid value */ } #endif spin_lock(&local->baplock); res = hfa384x_setup_bap(dev, BAP0, rxfid, 0); if (!res) res = hfa384x_from_bap(dev, BAP0, &rxdesc, sizeof(rxdesc)); if (res) { spin_unlock(&local->baplock); printk(KERN_DEBUG "%s: copy from BAP0 failed %d\n", dev->name, res); if (res == -ETIMEDOUT) { schedule_work(&local->reset_queue); } goto rx_dropped; } len = le16_to_cpu(rxdesc.data_len); hdr_len = sizeof(rxdesc); status = le16_to_cpu(rxdesc.status); macport = (status >> 8) & 0x07; /* Drop frames with too large reported payload length. Monitor mode * seems to sometimes pass frames (e.g., ctrl::ack) with signed and * negative value, so allow also values 65522 .. 65534 (-14 .. -2) for * macport 7 */ if (len > PRISM2_DATA_MAXLEN + 8 /* WEP */) { if (macport == 7 && local->iw_mode == IW_MODE_MONITOR) { if (len >= (u16) -14) { hdr_len -= 65535 - len; hdr_len--; } len = 0; } else { spin_unlock(&local->baplock); printk(KERN_DEBUG "%s: Received frame with invalid " "length 0x%04x\n", dev->name, len); hostap_dump_rx_header(dev->name, &rxdesc); goto rx_dropped; } } skb = dev_alloc_skb(len + hdr_len); if (!skb) { spin_unlock(&local->baplock); printk(KERN_DEBUG "%s: RX failed to allocate skb\n", dev->name); goto rx_dropped; } skb->dev = dev; memcpy(skb_put(skb, hdr_len), &rxdesc, hdr_len); if (len > 0) res = hfa384x_from_bap(dev, BAP0, skb_put(skb, len), len); spin_unlock(&local->baplock); if (res) { printk(KERN_DEBUG "%s: RX failed to read " "frame data\n", dev->name); goto rx_dropped; } skb_queue_tail(&local->rx_list, skb); tasklet_schedule(&local->rx_tasklet); rx_exit: prism2_callback(local, PRISM2_CALLBACK_RX_END); if (!rx_pending) { HFA384X_OUTW(HFA384X_EV_RX, HFA384X_EVACK_OFF); } return; rx_dropped: dev->stats.rx_dropped++; if (skb) dev_kfree_skb(skb); goto rx_exit; } /* Called only as a tasklet (software IRQ) */ static void hostap_rx_skb(local_info_t *local, struct sk_buff *skb) { struct hfa384x_rx_frame *rxdesc; struct net_device *dev = skb->dev; struct hostap_80211_rx_status stats; int hdrlen, rx_hdrlen; rx_hdrlen = sizeof(*rxdesc); if (skb->len < sizeof(*rxdesc)) { /* Allow monitor mode to receive shorter frames */ if (local->iw_mode == IW_MODE_MONITOR && skb->len >= sizeof(*rxdesc) - 30) { rx_hdrlen = skb->len; } else { dev_kfree_skb(skb); return; } } rxdesc = (struct hfa384x_rx_frame *) skb->data; if (local->frame_dump & PRISM2_DUMP_RX_HDR && skb->len >= sizeof(*rxdesc)) hostap_dump_rx_header(dev->name, rxdesc); if (le16_to_cpu(rxdesc->status) & HFA384X_RX_STATUS_FCSERR && (!local->monitor_allow_fcserr || local->iw_mode != IW_MODE_MONITOR)) goto drop; if (skb->len > PRISM2_DATA_MAXLEN) { printk(KERN_DEBUG "%s: RX: len(%d) > MAX(%d)\n", dev->name, skb->len, PRISM2_DATA_MAXLEN); goto drop; } stats.mac_time = le32_to_cpu(rxdesc->time); stats.signal = rxdesc->signal - local->rssi_to_dBm; stats.noise = rxdesc->silence - local->rssi_to_dBm; stats.rate = rxdesc->rate; /* Convert Prism2 RX structure into IEEE 802.11 header */ hdrlen = hostap_80211_get_hdrlen(rxdesc->frame_control); if (hdrlen > rx_hdrlen) hdrlen = rx_hdrlen; memmove(skb_pull(skb, rx_hdrlen - hdrlen), &rxdesc->frame_control, hdrlen); hostap_80211_rx(dev, skb, &stats); return; drop: dev_kfree_skb(skb); } /* Called only as a tasklet (software IRQ) */ static void hostap_rx_tasklet(unsigned long data) { local_info_t *local = (local_info_t *) data; struct sk_buff *skb; while ((skb = skb_dequeue(&local->rx_list)) != NULL) hostap_rx_skb(local, skb); } /* Called only from hardware IRQ */ static void prism2_alloc_ev(struct net_device *dev) { struct hostap_interface *iface; local_info_t *local; int idx; u16 fid; iface = netdev_priv(dev); local = iface->local; fid = prism2_read_fid_reg(dev, HFA384X_ALLOCFID_OFF); PDEBUG(DEBUG_FID, "FID: interrupt: ALLOC - fid=0x%04x\n", fid); spin_lock(&local->txfidlock); idx = local->next_alloc; do { if (local->txfid[idx] == fid) { PDEBUG(DEBUG_FID, "FID: found matching txfid[%d]\n", idx); #ifndef final_version if (local->intransmitfid[idx] == PRISM2_TXFID_EMPTY) printk("Already released txfid found at idx " "%d\n", idx); if (local->intransmitfid[idx] == PRISM2_TXFID_RESERVED) printk("Already reserved txfid found at idx " "%d\n", idx); #endif local->intransmitfid[idx] = PRISM2_TXFID_EMPTY; idx++; local->next_alloc = idx >= PRISM2_TXFID_COUNT ? 0 : idx; if (!test_bit(HOSTAP_BITS_TRANSMIT, &local->bits) && netif_queue_stopped(dev)) netif_wake_queue(dev); spin_unlock(&local->txfidlock); return; } idx++; if (idx >= PRISM2_TXFID_COUNT) idx = 0; } while (idx != local->next_alloc); printk(KERN_WARNING "%s: could not find matching txfid (0x%04x, new " "read 0x%04x) for alloc event\n", dev->name, fid, HFA384X_INW(HFA384X_ALLOCFID_OFF)); printk(KERN_DEBUG "TXFIDs:"); for (idx = 0; idx < PRISM2_TXFID_COUNT; idx++) printk(" %04x[%04x]", local->txfid[idx], local->intransmitfid[idx]); printk("\n"); spin_unlock(&local->txfidlock); /* FIX: should probably schedule reset; reference to one txfid was lost * completely.. Bad things will happen if we run out of txfids * Actually, this will cause netdev watchdog to notice TX timeout and * then card reset after all txfids have been leaked. */ } /* Called only as a tasklet (software IRQ) */ static void hostap_tx_callback(local_info_t *local, struct hfa384x_tx_frame *txdesc, int ok, char *payload) { u16 sw_support, hdrlen, len; struct sk_buff *skb; struct hostap_tx_callback_info *cb; /* Make sure that frame was from us. */ if (memcmp(txdesc->addr2, local->dev->dev_addr, ETH_ALEN)) { printk(KERN_DEBUG "%s: TX callback - foreign frame\n", local->dev->name); return; } sw_support = le32_to_cpu(txdesc->sw_support); spin_lock(&local->lock); cb = local->tx_callback; while (cb != NULL && cb->idx != sw_support) cb = cb->next; spin_unlock(&local->lock); if (cb == NULL) { printk(KERN_DEBUG "%s: could not find TX callback (idx %d)\n", local->dev->name, sw_support); return; } hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control); len = le16_to_cpu(txdesc->data_len); skb = dev_alloc_skb(hdrlen + len); if (skb == NULL) { printk(KERN_DEBUG "%s: hostap_tx_callback failed to allocate " "skb\n", local->dev->name); return; } memcpy(skb_put(skb, hdrlen), (void *) &txdesc->frame_control, hdrlen); if (payload) memcpy(skb_put(skb, len), payload, len); skb->dev = local->dev; skb_reset_mac_header(skb); cb->func(skb, ok, cb->data); } /* Called only as a tasklet (software IRQ) */ static int hostap_tx_compl_read(local_info_t *local, int error, struct hfa384x_tx_frame *txdesc, char **payload) { u16 fid, len; int res, ret = 0; struct net_device *dev = local->dev; fid = prism2_read_fid_reg(dev, HFA384X_TXCOMPLFID_OFF); PDEBUG(DEBUG_FID, "interrupt: TX (err=%d) - fid=0x%04x\n", fid, error); spin_lock(&local->baplock); res = hfa384x_setup_bap(dev, BAP0, fid, 0); if (!res) res = hfa384x_from_bap(dev, BAP0, txdesc, sizeof(*txdesc)); if (res) { PDEBUG(DEBUG_EXTRA, "%s: TX (err=%d) - fid=0x%04x - could not " "read txdesc\n", dev->name, error, fid); if (res == -ETIMEDOUT) { schedule_work(&local->reset_queue); } ret = -1; goto fail; } if (txdesc->sw_support) { len = le16_to_cpu(txdesc->data_len); if (len < PRISM2_DATA_MAXLEN) { *payload = kmalloc(len, GFP_ATOMIC); if (*payload == NULL || hfa384x_from_bap(dev, BAP0, *payload, len)) { PDEBUG(DEBUG_EXTRA, "%s: could not read TX " "frame payload\n", dev->name); kfree(*payload); *payload = NULL; ret = -1; goto fail; } } } fail: spin_unlock(&local->baplock); return ret; } /* Called only as a tasklet (software IRQ) */ static void prism2_tx_ev(local_info_t *local) { struct net_device *dev = local->dev; char *payload = NULL; struct hfa384x_tx_frame txdesc; if (hostap_tx_compl_read(local, 0, &txdesc, &payload)) goto fail; if (local->frame_dump & PRISM2_DUMP_TX_HDR) { PDEBUG(DEBUG_EXTRA, "%s: TX - status=0x%04x " "retry_count=%d tx_rate=%d seq_ctrl=%d " "duration_id=%d\n", dev->name, le16_to_cpu(txdesc.status), txdesc.retry_count, txdesc.tx_rate, le16_to_cpu(txdesc.seq_ctrl), le16_to_cpu(txdesc.duration_id)); } if (txdesc.sw_support) hostap_tx_callback(local, &txdesc, 1, payload); kfree(payload); fail: HFA384X_OUTW(HFA384X_EV_TX, HFA384X_EVACK_OFF); } /* Called only as a tasklet (software IRQ) */ static void hostap_sta_tx_exc_tasklet(unsigned long data) { local_info_t *local = (local_info_t *) data; struct sk_buff *skb; while ((skb = skb_dequeue(&local->sta_tx_exc_list)) != NULL) { struct hfa384x_tx_frame *txdesc = (struct hfa384x_tx_frame *) skb->data; if (skb->len >= sizeof(*txdesc)) { /* Convert Prism2 RX structure into IEEE 802.11 header */ int hdrlen = hostap_80211_get_hdrlen(txdesc->frame_control); memmove(skb_pull(skb, sizeof(*txdesc) - hdrlen), &txdesc->frame_control, hdrlen); hostap_handle_sta_tx_exc(local, skb); } dev_kfree_skb(skb); } } /* Called only as a tasklet (software IRQ) */ static void prism2_txexc(local_info_t *local) { struct net_device *dev = local->dev; u16 status, fc; int show_dump, res; char *payload = NULL; struct hfa384x_tx_frame txdesc; show_dump = local->frame_dump & PRISM2_DUMP_TXEXC_HDR; dev->stats.tx_errors++; res = hostap_tx_compl_read(local, 1, &txdesc, &payload); HFA384X_OUTW(HFA384X_EV_TXEXC, HFA384X_EVACK_OFF); if (res) return; status = le16_to_cpu(txdesc.status); /* We produce a TXDROP event only for retry or lifetime * exceeded, because that's the only status that really mean * that this particular node went away. * Other errors means that *we* screwed up. - Jean II */ if (status & (HFA384X_TX_STATUS_RETRYERR | HFA384X_TX_STATUS_AGEDERR)) { union iwreq_data wrqu; /* Copy 802.11 dest address. */ memcpy(wrqu.addr.sa_data, txdesc.addr1, ETH_ALEN); wrqu.addr.sa_family = ARPHRD_ETHER; wireless_send_event(dev, IWEVTXDROP, &wrqu, NULL); } else show_dump = 1; if (local->iw_mode == IW_MODE_MASTER || local->iw_mode == IW_MODE_REPEAT || local->wds_type & HOSTAP_WDS_AP_CLIENT) { struct sk_buff *skb; skb = dev_alloc_skb(sizeof(txdesc)); if (skb) { memcpy(skb_put(skb, sizeof(txdesc)