/* * Common code for mac80211 Prism54 drivers * * Copyright (c) 2006, Michael Wu * Copyright (c) 2007, Christian Lamparter * Copyright 2008, Johannes Berg * * Based on: * - the islsm (softmac prism54) driver, which is: * Copyright 2004-2006 Jean-Baptiste Note , et al. * - stlc45xx driver * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). * * 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. */ #include #include #include #include #include "p54.h" #include "p54common.h" static int modparam_nohwcrypt; module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); MODULE_AUTHOR("Michael Wu "); MODULE_DESCRIPTION("Softmac Prism54 common code"); MODULE_LICENSE("GPL"); MODULE_ALIAS("prism54common"); static struct ieee80211_rate p54_bgrates[] = { { .bitrate = 10, .hw_value = 0, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, { .bitrate = 60, .hw_value = 4, }, { .bitrate = 90, .hw_value = 5, }, { .bitrate = 120, .hw_value = 6, }, { .bitrate = 180, .hw_value = 7, }, { .bitrate = 240, .hw_value = 8, }, { .bitrate = 360, .hw_value = 9, }, { .bitrate = 480, .hw_value = 10, }, { .bitrate = 540, .hw_value = 11, }, }; static struct ieee80211_channel p54_bgchannels[] = { { .center_freq = 2412, .hw_value = 1, }, { .center_freq = 2417, .hw_value = 2, }, { .center_freq = 2422, .hw_value = 3, }, { .center_freq = 2427, .hw_value = 4, }, { .center_freq = 2432, .hw_value = 5, }, { .center_freq = 2437, .hw_value = 6, }, { .center_freq = 2442, .hw_value = 7, }, { .center_freq = 2447, .hw_value = 8, }, { .center_freq = 2452, .hw_value = 9, }, { .center_freq = 2457, .hw_value = 10, }, { .center_freq = 2462, .hw_value = 11, }, { .center_freq = 2467, .hw_value = 12, }, { .center_freq = 2472, .hw_value = 13, }, { .center_freq = 2484, .hw_value = 14, }, }; static struct ieee80211_supported_band band_2GHz = { .channels = p54_bgchannels, .n_channels = ARRAY_SIZE(p54_bgchannels), .bitrates = p54_bgrates, .n_bitrates = ARRAY_SIZE(p54_bgrates), }; static struct ieee80211_rate p54_arates[] = { { .bitrate = 60, .hw_value = 4, }, { .bitrate = 90, .hw_value = 5, }, { .bitrate = 120, .hw_value = 6, }, { .bitrate = 180, .hw_value = 7, }, { .bitrate = 240, .hw_value = 8, }, { .bitrate = 360, .hw_value = 9, }, { .bitrate = 480, .hw_value = 10, }, { .bitrate = 540, .hw_value = 11, }, }; static struct ieee80211_channel p54_achannels[] = { { .center_freq = 4920 }, { .center_freq = 4940 }, { .center_freq = 4960 }, { .center_freq = 4980 }, { .center_freq = 5040 }, { .center_freq = 5060 }, { .center_freq = 5080 }, { .center_freq = 5170 }, { .center_freq = 5180 }, { .center_freq = 5190 }, { .center_freq = 5200 }, { .center_freq = 5210 }, { .center_freq = 5220 }, { .center_freq = 5230 }, { .center_freq = 5240 }, { .center_freq = 5260 }, { .center_freq = 5280 }, { .center_freq = 5300 }, { .center_freq = 5320 }, { .center_freq = 5500 }, { .center_freq = 5520 }, { .center_freq = 5540 }, { .center_freq = 5560 }, { .center_freq = 5580 }, { .center_freq = 5600 }, { .center_freq = 5620 }, { .center_freq = 5640 }, { .center_freq = 5660 }, { .center_freq = 5680 }, { .center_freq = 5700 }, { .center_freq = 5745 }, { .center_freq = 5765 }, { .center_freq = 5785 }, { .center_freq = 5805 }, { .center_freq = 5825 }, }; static struct ieee80211_supported_band band_5GHz = { .channels = p54_achannels, .n_channels = ARRAY_SIZE(p54_achannels), .bitrates = p54_arates, .n_bitrates = ARRAY_SIZE(p54_arates), }; int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw) { struct p54_common *priv = dev->priv; struct bootrec_exp_if *exp_if; struct bootrec *bootrec; u32 *data = (u32 *)fw->data; u32 *end_data = (u32 *)fw->data + (fw->size >> 2); u8 *fw_version = NULL; size_t len; int i; int maxlen; if (priv->rx_start) return 0; while (data < end_data && *data) data++; while (data < end_data && !*data) data++; bootrec = (struct bootrec *) data; while (bootrec->data <= end_data && (bootrec->data + (len = le32_to_cpu(bootrec->len))) <= end_data) { u32 code = le32_to_cpu(bootrec->code); switch (code) { case BR_CODE_COMPONENT_ID: priv->fw_interface = be32_to_cpup((__be32 *) bootrec->data); switch (priv->fw_interface) { case FW_LM86: case FW_LM20: case FW_LM87: { char *iftype = (char *)bootrec->data; printk(KERN_INFO "%s: p54 detected a LM%c%c " "firmware\n", wiphy_name(dev->wiphy), iftype[2], iftype[3]); break; } case FW_FMAC: default: printk(KERN_ERR "%s: unsupported firmware\n", wiphy_name(dev->wiphy)); return -ENODEV; } break; case BR_CODE_COMPONENT_VERSION: /* 24 bytes should be enough for all firmwares */ if (strnlen((unsigned char*)bootrec->data, 24) < 24) fw_version = (unsigned char*)bootrec->data; break; case BR_CODE_DESCR: { struct bootrec_desc *desc = (struct bootrec_desc *)bootrec->data; priv->rx_start = le32_to_cpu(desc->rx_start); /* FIXME add sanity checking */ priv->rx_end = le32_to_cpu(desc->rx_end) - 0x3500; priv->headroom = desc->headroom; priv->tailroom = desc->tailroom; priv->privacy_caps = desc->privacy_caps; priv->rx_keycache_size = desc->rx_keycache_size; if (le32_to_cpu(bootrec->len) == 11) priv->rx_mtu = le16_to_cpu(desc->rx_mtu); else priv->rx_mtu = (size_t) 0x620 - priv->tx_hdr_len; maxlen = priv->tx_hdr_len + /* USB devices */ sizeof(struct p54_rx_data) + 4 + /* rx alignment */ IEEE80211_MAX_FRAG_THRESHOLD; if (priv->rx_mtu > maxlen && PAGE_SIZE == 4096) { printk(KERN_INFO "p54: rx_mtu reduced from %d " "to %d\n", priv->rx_mtu, maxlen); priv->rx_mtu = maxlen; } break; } case BR_CODE_EXPOSED_IF: exp_if = (struct bootrec_exp_if *) bootrec->data; for (i = 0; i < (len * sizeof(*exp_if) / 4); i++) if (exp_if[i].if_id == cpu_to_le16(0x1a)) priv->fw_var = le16_to_cpu(exp_if[i].variant); break; case BR_CODE_DEPENDENT_IF: break; case BR_CODE_END_OF_BRA: case LEGACY_BR_CODE_END_OF_BRA: end_data = NULL; break; default: break; } bootrec = (struct bootrec *)&bootrec->data[len]; } if (fw_version) printk(KERN_INFO "%s: FW rev %s - Softmac protocol %x.%x\n", wiphy_name(dev->wiphy), fw_version, priv->fw_var >> 8, priv->fw_var & 0xff); if (priv->fw_var < 0x500) printk(KERN_INFO "%s: you are using an obsolete firmware. " "visit http://wireless.kernel.org/en/users/Drivers/p54 " "and grab one for \"kernel >= 2.6.28\"!\n", wiphy_name(dev->wiphy)); if (priv->fw_var >= 0x300) { /* Firmware supports QoS, use it! */ priv->tx_stats[4].limit = 3; /* AC_VO */ priv->tx_stats[5].limit = 4; /* AC_VI */ priv->tx_stats[6].limit = 3; /* AC_BE */ priv->tx_stats[7].limit = 2; /* AC_BK */ dev->queues = 4; } if (!modparam_nohwcrypt) printk(KERN_INFO "%s: cryptographic accelerator " "WEP:%s, TKIP:%s, CCMP:%s\n", wiphy_name(dev->wiphy), (priv->privacy_caps & BR_DESC_PRIV_CAP_WEP) ? "YES" : "no", (priv->privacy_caps & (BR_DESC_PRIV_CAP_TKIP | BR_DESC_PRIV_CAP_MICHAEL)) ? "YES" : "no", (priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP) ? "YES" : "no"); return 0; } EXPORT_SYMBOL_GPL(p54_parse_firmware); static int p54_convert_rev0(struct ieee80211_hw *dev, struct pda_pa_curve_data *curve_data) { struct p54_common *priv = dev->priv; struct p54_pa_curve_data_sample *dst; struct pda_pa_curve_data_sample_rev0 *src; size_t cd_len = sizeof(*curve_data) + (curve_data->points_per_channel*sizeof(*dst) + 2) * curve_data->channels; unsigned int i, j; void *source, *target; priv->curve_data = kmalloc(cd_len, GFP_KERNEL); if (!priv->curve_data) return -ENOMEM; memcpy(priv->curve_data, curve_data, sizeof(*curve_data)); source = curve_data->data; target = priv->curve_data->data; for (i = 0; i < curve_data->channels; i++) { __le16 *freq = source; source += sizeof(__le16); *((__le16 *)target) = *freq; target += sizeof(__le16); for (j = 0; j < curve_data->points_per_channel; j++) { dst = target; src = source; dst->rf_power = src->rf_power; dst->pa_detector = src->pa_detector; dst->data_64qam = src->pcv; /* "invent" the points for the other modulations */ #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y) dst->data_16qam = SUB(src->pcv, 12); dst->data_qpsk = SUB(dst->data_16qam, 12); dst->data_bpsk = SUB(dst->data_qpsk, 12); dst->data_barker = SUB(dst->data_bpsk, 14); #undef SUB target += sizeof(*dst); source += sizeof(*src); } } return 0; } static int p54_convert_rev1(struct ieee80211_hw *dev, struct pda_pa_curve_data *curve_data) { struct p54_common *priv = dev->priv; struct p54_pa_curve_data_sample *dst; struct pda_pa_curve_data_sample_rev1 *src; size_t cd_len = sizeof(*curve_data) + (curve_data->points_per_channel*sizeof(*dst) + 2) * curve_data->channels; unsigned int i, j; void *source, *target; priv->curve_data = kmalloc(cd_len, GFP_KERNEL); if (!priv->curve_data) return -ENOMEM; memcpy(priv->curve_data, curve_data, sizeof(*curve_data)); source = curve_data->data; target = priv->curve_data->data; for (i = 0; i < curve_data->channels; i++) { __le16 *freq = source; source += sizeof(__le16); *((__le16 *)target) = *freq; target += sizeof(__le16); for (j = 0; j < curve_data->points_per_channel; j++) { memcpy(target, source, sizeof(*src)); target += sizeof(*dst); source += sizeof(*src); } source++; } return 0; } static const char *p54_rf_chips[] = { "NULL", "Duette3", "Duette2", "Frisbee", "Xbow", "Longbow", "NULL", "NULL" }; static int p54_init_xbow_synth(struct ieee80211_hw *dev); static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len, u16 type) { struct p54_common *priv = dev->priv; int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0; int entry_size = sizeof(struct pda_rssi_cal_entry) + offset; int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2; int i; if (len != (entry_size * num_entries)) { printk(KERN_ERR "%s: unknown rssi calibration data packing " " type:(%x) len:%d.\n", wiphy_name(dev->wiphy), type, len); print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE, data, len); printk(KERN_ERR "%s: please report this issue.\n", wiphy_name(dev->wiphy)); return; } for (i = 0; i < num_entries; i++) { struct pda_rssi_cal_entry *cal = data + (offset + i * entry_size); priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul); priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add); } } static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len) { struct p54_common *priv = dev->priv; struct eeprom_pda_wrap *wrap = NULL; struct pda_entry *entry; unsigned int data_len, entry_len; void *tmp; int err; u8 *end = (u8 *)eeprom + len; u16 synth = 0; wrap = (struct eeprom_pda_wrap *) eeprom; entry = (void *)wrap->data + le16_to_cpu(wrap->len); /* verify that at least the entry length/code fits */ while ((u8 *)entry <= end - sizeof(*entry)) { entry_len = le16_to_cpu(entry->len); data_len = ((entry_len - 1) << 1); /* abort if entry exceeds whole structure */ if ((u8 *)entry + sizeof(*entry) + data_len > end) break; switch (le16_to_cpu(entry->code)) { case PDR_MAC_ADDRESS: SET_IEEE80211_PERM_ADDR(dev, entry->data); break; case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS: if (data_len < 2) { err = -EINVAL; goto err; } if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) { err = -EINVAL; goto err; } priv->output_limit = kmalloc(entry->data[1] * sizeof(*priv->output_limit), GFP_KERNEL); if (!priv->output_limit) { err = -ENOMEM; goto err; } memcpy(priv->output_limit, &entry->data[2], entry->data[1]*sizeof(*priv->output_limit)); priv->output_limit_len = entry->data[1]; break; case PDR_PRISM_PA_CAL_CURVE_DATA: { struct pda_pa_curve_data *curve_data = (struct pda_pa_curve_data *)entry->data; if (data_len < sizeof(*curve_data)) { err = -EINVAL; goto err; } switch (curve_data->cal_method_rev) { case 0: err = p54_convert_rev0(dev, curve_data); break; case 1: err = p54_convert_rev1(dev, curve_data); break; default: printk(KERN_ERR "%s: unknown curve data " "revision %d\n", wiphy_name(dev->wiphy), curve_data->cal_method_rev); err = -ENODEV; break; } if (err) goto err; } break; case PDR_PRISM_ZIF_TX_IQ_CALIBRATION: priv->iq_autocal = kmalloc(data_len, GFP_KERNEL); if (!priv->iq_autocal) { err = -ENOMEM; goto err; } memcpy(priv->iq_autocal, entry->data, data_len); priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry); break; case PDR_INTERFACE_LIST: tmp = entry->data; while ((u8 *)tmp < entry->data + data_len) { struct bootrec_exp_if *exp_if = tmp; if (le16_to_cpu(exp_if->if_id) == 0xf) synth = le16_to_cpu(exp_if->variant); tmp += sizeof(struct bootrec_exp_if); } break; case PDR_HARDWARE_PLATFORM_COMPONENT_ID: priv->version = *(u8 *)(entry->data + 1); break; case PDR_RSSI_LINEAR_APPROXIMATION: case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND: case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED: p54_parse_rssical(dev, entry->data, data_len, le16_to_cpu(entry->code)); break; case PDR_END: /* make it overrun */ entry_len = len; break; case PDR_MANUFACTURING_PART_NUMBER: case PDR_PDA_VERSION: case PDR_NIC_SERIAL_NUMBER: case PDR_REGULATORY_DOMAIN_LIST: case PDR_TEMPERATURE_TYPE: case PDR_PRISM_PCI_IDENTIFIER: case PDR_COUNTRY_INFORMATION: case PDR_OEM_NAME: case PDR_PRODUCT_NAME: case PDR_UTF8_OEM_NAME: case PDR_UTF8_PRODUCT_NAME: case PDR_COUNTRY_LIST: case PDR_DEFAULT_COUNTRY: case PDR_ANTENNA_GAIN: case PDR_PRISM_INDIGO_PA_CALIBRATION_DATA: case PDR_REGULATORY_POWER_LIMITS: case PDR_RADIATED_TRANSMISSION_CORRECTION: case PDR_PRISM_TX_IQ_CALIBRATION: case PDR_BASEBAND_REGISTERS: case PDR_PER_CHANNEL_BASEBAND_REGISTERS: break; default: printk(KERN_INFO "%s: unknown eeprom code : 0x%x\n", wiphy_name(dev->wiphy), le16_to_cpu(entry->code)); break; } entry = (void *)entry + (entry_len + 1)*2; } if (!synth || !priv->iq_autocal || !priv->output_limit || !priv->curve_data) { printk(KERN_ERR "%s: not all required entries found in eeprom!\n", wiphy_name(dev->wiphy)); err = -EINVAL; goto err; } priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK; if (priv->rxhw == 4) p54_init_xbow_synth(dev); if (!(synth & PDR_SYNTH_24_GHZ_DISABLED)) dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz; if (!(synth & PDR_SYNTH_5_GHZ_DISABLED)) dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz; if (!is_valid_ether_addr(dev->wiphy->perm_addr)) { u8 perm_addr[ETH_ALEN]; printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n", wiphy_name(dev->wiphy)); random_ether_addr(perm_addr); SET_IEEE80211_PERM_ADDR(dev, perm_addr); } printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n", wiphy_name(dev->wiphy), dev->wiphy->perm_addr, priv->version, p54_rf_chips[priv->rxhw]); return 0; err: if (priv->iq_autocal) { kfree(priv->iq_autocal); priv->iq_autocal = NULL; } if (priv->output_limit) { kfree(priv->output_limit); priv->output_limit = NULL; } if (priv->curve_data) { kfree(priv->curve_data); priv->curve_data = NULL; } printk(KERN_ERR "%s: eeprom parse failed!\n", wiphy_name(dev->wiphy)); return err; } static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi) { struct p54_common *priv = dev->priv; int band = dev->conf.channel->band; return ((rssi * priv->rssical_db[band].mul) / 64 + priv->rssical_db[band].add) / 4; } static int p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54_common *priv = dev->priv; struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data; struct ieee80211_rx_status rx_status = {0}; u16 freq = le16_to_cpu(hdr->freq); size_t header_len = sizeof(*hdr); u32 tsf32; u8 rate = hdr->rate & 0xf; /* * If the device is in a unspecified state we have to * ignore all data frames. Else we could end up with a * nasty crash. */ if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) return 0; if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) { if (priv->filter_flags & FIF_FCSFAIL) rx_status.flag |= RX_FLAG_FAILED_FCS_CRC; else return 0; } if (hdr->decrypt_status == P54_DECRYPT_OK) rx_status.flag |= RX_FLAG_DECRYPTED; if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) || (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP)) rx_status.flag |= RX_FLAG_MMIC_ERROR; rx_status.signal = p54_rssi_to_dbm(dev, hdr->rssi); rx_status.noise = priv->noise; /* XX correct? */ rx_status.qual = (100 * hdr->rssi) / 127; if (hdr->rate & 0x10) rx_status.flag |= RX_FLAG_SHORTPRE; if (dev->conf.channel->band == IEEE80211_BAND_5GHZ) rx_status.rate_idx = (rate < 4) ? 0 : rate - 4; else rx_status.rate_idx = rate; rx_status.freq = freq; rx_status.band = dev->conf.channel->band; rx_status.antenna = hdr->antenna; tsf32 = le32_to_cpu(hdr->tsf32); if (tsf32 < priv->tsf_low32) priv->tsf_high32++; rx_status.mactime = ((u64)priv->tsf_high32) << 32 | tsf32; priv->tsf_low32 = tsf32; rx_status.flag |= RX_FLAG_TSFT; if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN)) header_len += hdr->align[0]; skb_pull(skb, header_len); skb_trim(skb, le16_to_cpu(hdr->len)); ieee80211_rx_irqsafe(dev, skb, &rx_status); queue_delayed_work(dev->workqueue, &priv->work, msecs_to_jiffies(P54_STATISTICS_UPDATE)); return -1; } static void inline p54_wake_free_queues(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; int i; if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) return ; for (i = 0; i < dev->queues; i++) if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit) ieee80211_wake_queue(dev, i); } void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54_common *priv = dev->priv; struct ieee80211_tx_info *info; struct memrecord *range; unsigned long flags; u32 freed = 0, last_addr = priv->rx_start; if (unlikely(!skb || !dev || !skb_queue_len(&priv->tx_queue))) return; /* * don't try to free an already unlinked skb */ if (unlikely((!skb->next) || (!skb->prev))) return; spin_lock_irqsave(&priv->tx_queue.lock, flags); info = IEEE80211_SKB_CB(skb); range = (void *)info->rate_driver_data; if (skb->prev != (struct sk_buff *)&priv->tx_queue) { struct ieee80211_tx_info *ni; struct memrecord *mr; ni = IEEE80211_SKB_CB(skb->prev); mr = (struct memrecord *)ni->rate_driver_data; last_addr = mr->end_addr; } if (skb->next != (struct sk_buff *)&priv->tx_queue) { struct ieee80211_tx_info *ni; struct memrecord *mr; ni = IEEE80211_SKB_CB(skb->next); mr = (struct memrecord *)ni->rate_driver_data; freed = mr->start_addr - last_addr; } else freed = priv->rx_end - last_addr; __skb_unlink(skb, &priv->tx_queue); spin_unlock_irqrestore(&priv->tx_queue.lock, flags); dev_kfree_skb_any(skb); if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom) p54_wake_free_queues(dev); } EXPORT_SYMBOL_GPL(p54_free_skb); static struct sk_buff *p54_find_tx_entry(struct ieee80211_hw *dev, __le32 req_id) { struct p54_common *priv = dev->priv; struct sk_buff *entry = priv->tx_queue.next; unsigned long flags; spin_lock_irqsave(&priv->tx_queue.lock, flags); while (entry != (struct sk_buff *)&priv->tx_queue) { struct p54_hdr *hdr = (struct p54_hdr *) entry->data; if (hdr->req_id == req_id) { spin_unlock_irqrestore(&priv->tx_queue.lock, flags); return entry; } entry = entry->next; } spin_unlock_irqrestore(&priv->tx_queue.lock, flags); return NULL; } static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54_common *priv = dev->priv; struct p54_hdr *hdr = (struct p54_hdr *) skb->data; struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data; struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next; u32 addr = le32_to_cpu(hdr->req_id) - priv->headroom; struct memrecord *range = NULL; u32 freed = 0; u32 last_addr = priv->rx_start; unsigned long flags; int count, idx; spin_lock_irqsave(&priv->tx_queue.lock, flags); while (entry != (struct sk_buff *)&priv->tx_queue) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry); struct p54_hdr *entry_hdr; struct p54_tx_data *entry_data; unsigned int pad = 0, frame_len; range = (void *)info->rate_driver_data; if (range->start_addr != addr) { last_addr = range->end_addr; entry = entry->next; continue; } if (entry->next != (struct sk_buff *)&priv->tx_queue) { struct ieee80211_tx_info *ni; struct memrecord *mr; ni = IEEE80211_SKB_CB(entry->next); mr = (struct memrecord *)ni->rate_driver_data; freed = mr->start_addr - last_addr; } else freed = priv->rx_end - last_addr; last_addr = range->end_addr; __skb_unlink(entry, &priv->tx_queue); spin_unlock_irqrestore(&priv->tx_queue.lock, flags); frame_len = entry->len; entry_hdr = (struct p54_hdr *) entry->data; entry_data = (struct p54_tx_data *) entry_hdr->data; priv->tx_stats[entry_data->hw_queue].len--; priv->stats.dot11ACKFailureCount += payload->tries - 1; if (unlikely(entry == priv->cached_beacon)) { kfree_skb(entry); priv->cached_beacon = NULL; goto out; } /* * Clear manually, ieee80211_tx_info_clear_status would * clear the counts too and we need them. */ memset(&info->status.ampdu_ack_len, 0, sizeof(struct ieee80211_tx_info) - offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN)) pad = entry_data->align[0]; /* walk through the rates array and adjust the counts */ count = payload->tries; for (idx = 0; idx < 4; idx++) { if (count >= info->status.rates[idx].count) { count -= info->status.rates[idx].count; } else if (count > 0) { info->status.rates[idx].count = count; count = 0; } else { info->status.rates[idx].idx = -1; info->status.rates[idx].count = 0; } } if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && (!payload->status)) info->flags |= IEEE80211_TX_STAT_ACK; if (payload->status & P54_TX_PSM_CANCELLED) info->flags |= IEEE80211_TX_STAT_TX_FILTERED; info->status.ack_signal = p54_rssi_to_dbm(dev, (int)payload->ack_rssi); /* Undo all changes to the frame. */ switch (entry_data->key_type) { case P54_CRYPTO_TKIPMICHAEL: { u8 *iv = (u8 *)(entry_data->align + pad + entry_data->crypt_offset); /* Restore the original TKIP IV. */ iv[2] = iv[0]; iv[0] = iv[1]; iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */ frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */ break; } case P54_CRYPTO_AESCCMP: frame_len -= 8; /* remove CCMP_MIC */ break; case P54_CRYPTO_WEP: frame_len -= 4; /* remove WEP_ICV */ break; } skb_trim(entry, frame_len); skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data)); ieee80211_tx_status_irqsafe(dev, entry); goto out; } spin_unlock_irqrestore(&priv->tx_queue.lock, flags); out: if (freed >= priv->headroom + sizeof(struct p54_hdr) + 48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom) p54_wake_free_queues(dev); } static void p54_rx_eeprom_readback(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54_hdr *hdr = (struct p54_hdr *) skb->data; struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data; struct p54_common *priv = dev->priv; if (!priv->eeprom) return ; if (priv->fw_var >= 0x509) { memcpy(priv->eeprom, eeprom->v2.data, le16_to_cpu(eeprom->v2.len)); } else { memcpy(priv->eeprom, eeprom->v1.data, le16_to_cpu(eeprom->v1.len)); } complete(&priv->eeprom_comp); } static void p54_rx_stats(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54_common *priv = dev->priv; struct p54_hdr *hdr = (struct p54_hdr *) skb->data; struct p54_statistics *stats = (struct p54_statistics *) hdr->data; u32 tsf32; if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) return ; tsf32 = le32_to_cpu(stats->tsf32); if (tsf32 < priv->tsf_low32) priv->tsf_high32++; priv->tsf_low32 = tsf32; priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail); priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success); priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs); priv->noise = p54_rssi_to_dbm(dev, le32_to_cpu(stats->noise)); p54_free_skb(dev, p54_find_tx_entry(dev, hdr->req_id)); } static void p54_rx_trap(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54_hdr *hdr = (struct p54_hdr *) skb->data; struct p54_trap *trap = (struct p54_trap *) hdr->data; u16 event = le16_to_cpu(trap->event); u16 freq = le16_to_cpu(trap->frequency); switch (event) { case P54_TRAP_BEACON_TX: break; case P54_TRAP_RADAR: printk(KERN_INFO "%s: radar (freq:%d MHz)\n", wiphy_name(dev->wiphy), freq); break; case P54_TRAP_NO_BEACON: break; case P54_TRAP_SCAN: break; case P54_TRAP_TBTT: break; case P54_TRAP_TIMER: break; default: printk(KERN_INFO "%s: received event:%x freq:%d\n", wiphy_name(dev->wiphy), event, freq); break; } } static int p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54_hdr *hdr = (struct p54_hdr *) skb->data; switch (le16_to_cpu(hdr->type)) { case P54_CONTROL_TYPE_TXDONE: p54_rx_frame_sent(dev, skb); break; case P54_CONTROL_TYPE_TRAP: p54_rx_trap(dev, skb); break; case P54_CONTROL_TYPE_BBP: break; case P54_CONTROL_TYPE_STAT_READBACK: p54_rx_stats(dev, skb); break; case P54_CONTROL_TYPE_EEPROM_READBACK: p54_rx_eeprom_readback(dev, skb); break; default: printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n", wiphy_name(dev->wiphy), le16_to_cpu(hdr->type)); break; } return 0; } /* returns zero if skb can be reused */ int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb) { u16 type = le16_to_cpu(*((__le16 *)skb->data)); if (type & P54_HDR_FLAG_CONTROL) return p54_rx_control(dev, skb); else return p54_rx_data(dev, skb); } EXPORT_SYMBOL_GPL(p54_rx); /* * So, the firmware is somewhat stupid and doesn't know what places in its * memory incoming data should go to. By poking around in the firmware, we * can find some unused memory to upload our packets to. However, data that we * want the card to TX needs to stay intact until the card has told us that * it is done with it. This function finds empty places we can upload to and * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees * allocated areas. */ static int p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb, struct p54_hdr *data, u32 len) { struct p54_common *priv = dev->priv; struct sk_buff *entry = priv->tx_queue.next; struct sk_buff *target_skb = NULL; struct ieee80211_tx_info *info; struct memrecord *range; u32 last_addr = priv->rx_start; u32 largest_hole = 0; u32 target_addr = priv->rx_start; unsigned long flags; unsigned int left; len = (len + priv->headroom + priv->tailroom + 3) & ~0x3; if (!skb) return -EINVAL; spin_lock_irqsave(&priv->tx_queue.lock, flags); left = skb_queue_len(&priv->tx_queue); if (unlikely(left >= 28)) { /* * The tx_queue is nearly full! * We have throttle normal data traffic, because we must * have a few spare slots for control frames left. */ ieee80211_stop_queues(dev); queue_delayed_work(dev->workqueue, &priv->work, msecs_to_jiffies(P54_TX_TIMEOUT)); if (unlikely(left == 32)) { /* * The tx_queue is now really full. * * TODO: check if the device has crashed and reset it. */ spin_unlock_irqrestore(&priv->tx_queue.lock, flags); return -ENOSPC; } } while (left--) { u32 hole_size; info = IEEE80211_SKB_CB(entry); range = (void *)info->rate_driver_data; hole_size = range->start_addr - last_addr; if (!target_skb && hole_size >= len) { target_skb = entry->prev; hole_size -= len; target_addr = last_addr; } largest_hole = max(largest_hole, hole_size); last_addr = range->end_addr; entry = entry->next; } if (!target_skb && priv->rx_end - last_addr >= len) { target_skb = priv->tx_queue.prev; largest_hole = max(largest_hole, priv->rx_end - last_addr - len); if (!skb_queue_empty(&priv->tx_queue)) { info = IEEE80211_SKB_CB(target_skb); range = (void *)info->rate_driver_data; target_addr = range->end_addr; } } else largest_hole = max(largest_hole, priv->rx_end - last_addr); if (!target_skb) { spin_unlock_irqrestore(&priv->tx_queue.lock, flags); ieee80211_stop_queues(dev); return -ENOSPC; } info = IEEE80211_SKB_CB(skb); range = (void *)info->rate_driver_data; range->start_addr = target_addr; range->end_addr = target_addr + len; __skb_queue_after(&priv->tx_queue, target_skb, skb); spin_unlock_irqrestore(&priv->tx_queue.lock, flags); if (largest_hole < priv->headroom + sizeof(struct p54_hdr) + 48 + IEEE80211_MAX_RTS_THRESHOLD + priv->tailroom) ieee80211_stop_queues(dev); data->req_id = cpu_to_le32(target_addr + priv->headroom); return 0; } static struct sk_buff *p54_alloc_skb(struct ieee80211_hw *dev, u16 hdr_flags, u16 len, u16 type, gfp_t memflags) { struct p54_common *priv = dev->priv; struct p54_hdr *hdr; struct sk_buff *skb; skb = __dev_alloc_skb(len + priv->tx_hdr_len, memflags); if (!skb) return NULL; skb_reserve(skb, priv->tx_hdr_len); hdr = (struct p54_hdr *) skb_put(skb, sizeof(*hdr)); hdr->flags = cpu_to_le16(hdr_flags); hdr->len = cpu_to_le16(len - sizeof(*hdr)); hdr->type = cpu_to_le16(type); hdr->tries = hdr->rts_tries = 0; if (unlikely(p54_assign_address(dev, skb, hdr, len))) { kfree_skb(skb); return NULL; } return skb; } int p54_read_eeprom(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; struct p54_hdr *hdr = NULL; struct p54_eeprom_lm86 *eeprom_hdr; struct sk_buff *skb; size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize; int ret = -ENOMEM; void *eeprom = NULL; maxblocksize = EEPROM_READBACK_LEN; if (priv->fw_var >= 0x509) maxblocksize -= 0xc; else maxblocksize -= 0x4; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(*hdr) + sizeof(*eeprom_hdr) + maxblocksize, P54_CONTROL_TYPE_EEPROM_READBACK, GFP_KERNEL); if (!skb) goto free; priv->eeprom = kzalloc(EEPROM_READBACK_LEN, GFP_KERNEL); if (!priv->eeprom) goto free; eeprom = kzalloc(eeprom_size, GFP_KERNEL); if (!eeprom) goto free; eeprom_hdr = (struct p54_eeprom_lm86 *) skb_put(skb, sizeof(*eeprom_hdr) + maxblocksize); while (eeprom_size) { blocksize = min(eeprom_size, maxblocksize); if (priv->fw_var < 0x509) { eeprom_hdr->v1.offset = cpu_to_le16(offset); eeprom_hdr->v1.len = cpu_to_le16(blocksize); } else { eeprom_hdr->v2.offset = cpu_to_le32(offset); eeprom_hdr->v2.len = cpu_to_le16(blocksize); eeprom_hdr->v2.magic2 = 0xf; memcpy(eeprom_hdr->v2.magic, (const char *)"LOCK", 4); } priv->tx(dev, skb); if (!wait_for_completion_interruptible_timeout(&priv->eeprom_comp, HZ)) { printk(KERN_ERR "%s: device does not respond!\n", wiphy_name(dev->wiphy)); ret = -EBUSY; goto free; } memcpy(eeprom + offset, priv->eeprom, blocksize); offset += blocksize; eeprom_size -= blocksize; } ret = p54_parse_eeprom(dev, eeprom, offset); free: kfree(priv->eeprom); priv->eeprom = NULL; p54_free_skb(dev, skb); kfree(eeprom); return ret; } EXPORT_SYMBOL_GPL(p54_read_eeprom); static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, bool set) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_tim *tim; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(struct p54_hdr) + sizeof(*tim), P54_CONTROL_TYPE_TIM, GFP_ATOMIC); if (!skb) return -ENOMEM; tim = (struct p54_tim *) skb_put(skb, sizeof(*tim)); tim->count = 1; tim->entry[0] = cpu_to_le16(set ? (sta->aid | 0x8000) : sta->aid); priv->tx(dev, skb); return 0; } static int p54_sta_unlock(struct ieee80211_hw *dev, u8 *addr) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_sta_unlock *sta; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(struct p54_hdr) + sizeof(*sta), P54_CONTROL_TYPE_PSM_STA_UNLOCK, GFP_ATOMIC); if (!skb) return -ENOMEM; sta = (struct p54_sta_unlock *)skb_put(skb, sizeof(*sta)); memcpy(sta->addr, addr, ETH_ALEN); priv->tx(dev, skb); return 0; } static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif, enum sta_notify_cmd notify_cmd, struct ieee80211_sta *sta) { switch (notify_cmd) { case STA_NOTIFY_ADD: case STA_NOTIFY_REMOVE: /* * Notify the firmware that we don't want or we don't * need to buffer frames for this station anymore. */ p54_sta_unlock(dev, sta->addr); break; case STA_NOTIFY_AWAKE: /* update the firmware's filter table */ p54_sta_unlock(dev, sta->addr); break; default: break; } } static int p54_tx_cancel(struct ieee80211_hw *dev, struct sk_buff *entry) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_hdr *hdr; struct p54_txcancel *cancel; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(struct p54_hdr) + sizeof(*cancel), P54_CONTROL_TYPE_TXCANCEL, GFP_ATOMIC); if (!skb) return -ENOMEM; hdr = (void *)entry->data; cancel = (struct p54_txcancel *)skb_put(skb, sizeof(*cancel)); cancel->req_id = hdr->req_id; priv->tx(dev, skb); return 0; } static int p54_tx_fill(struct ieee80211_hw *dev, struct sk_buff *skb, struct ieee80211_tx_info *info, u8 *queue, size_t *extra_len, u16 *flags, u16 *aid) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; struct p54_common *priv = dev->priv; int ret = 0; if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) { if (ieee80211_is_beacon(hdr->frame_control)) { *aid = 0; *queue = 0; *extra_len = IEEE80211_MAX_TIM_LEN; *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP; return 0; } else if (ieee80211_is_probe_resp(hdr->frame_control)) { *aid = 0; *queue = 2; *flags = P54_HDR_FLAG_DATA_OUT_TIMESTAMP | P54_HDR_FLAG_DATA_OUT_NOCANCEL; return 0; } else { *queue = 2; ret = 0; } } else { *queue += 4; ret = 1; } switch (priv->mode) { case NL80211_IFTYPE_STATION: *aid = 1; break; case NL80211_IFTYPE_AP: case NL80211_IFTYPE_ADHOC: case NL80211_IFTYPE_MESH_POINT: if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { *aid = 0; *queue = 3; return 0; } if (info->control.sta) *aid = info->control.sta->aid; else *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL; } return ret; } static u8 p54_convert_algo(enum ieee80211_key_alg alg) { switch (alg) { case ALG_WEP: return P54_CRYPTO_WEP; case ALG_TKIP: return P54_CRYPTO_TKIPMICHAEL; case ALG_CCMP: return P54_CRYPTO_AESCCMP; default: return 0; } } static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct ieee80211_tx_queue_stats *current_queue = NULL; struct p54_common *priv = dev->priv; struct p54_hdr *hdr; struct p54_tx_data *txhdr; size_t padding, len, tim_len = 0; int i, j, ridx, ret; u16 hdr_flags = 0, aid = 0; u8 rate, queue, crypt_offset = 0; u8 cts_rate = 0x20; u8 rc_flags; u8 calculated_tries[4]; u8 nrates = 0, nremaining = 8; queue = skb_get_queue_mapping(skb); ret = p54_tx_fill(dev, skb, info, &queue, &tim_len, &hdr_flags, &aid); current_queue = &priv->tx_stats[queue]; if (unlikely((current_queue->len > current_queue->limit) && ret)) return NETDEV_TX_BUSY; current_queue->len++; current_queue->count++; if ((current_queue->len == current_queue->limit) && ret) ieee80211_stop_queue(dev, skb_get_queue_mapping(skb)); padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3; len = skb->len; if (info->control.hw_key) { crypt_offset = ieee80211_get_hdrlen_from_skb(skb); if (info->control.hw_key->alg == ALG_TKIP) { u8 *iv = (u8 *)(skb->data + crypt_offset); /* * The firmware excepts that the IV has to have * this special format */ iv[1] = iv[0]; iv[0] = iv[2]; iv[2] = 0; } } txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding); hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr)); if (padding) hdr_flags |= P54_HDR_FLAG_DATA_ALIGN; hdr->type = cpu_to_le16(aid); hdr->rts_tries = info->control.rates[0].count; /* * we register the rates in perfect order, and * RTS/CTS won't happen on 5 GHz */ cts_rate = info->control.rts_cts_rate_idx; memset(&txhdr->rateset, 0, sizeof(txhdr->rateset)); /* see how many rates got used */ for (i = 0; i < 4; i++) { if (info->control.rates[i].idx < 0) break; nrates++; } /* limit tries to 8/nrates per rate */ for (i = 0; i < nrates; i++) { /* * The magic expression here is equivalent to 8/nrates for * all values that matter, but avoids division and jumps. * Note that nrates can only take the values 1 through 4. */ calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1, info->control.rates[i].count); nremaining -= calculated_tries[i]; } /* if there are tries left, distribute from back to front */ for (i = nrates - 1; nremaining > 0 && i >= 0; i--) { int tmp = info->control.rates[i].count - calculated_tries[i]; if (tmp <= 0) continue; /* RC requested more tries at this rate */ tmp = min_t(int, tmp, nremaining); calculated_tries[i] += tmp; nremaining -= tmp; } ridx = 0; for (i = 0; i < nrates && ridx < 8; i++) { /* we register the rates in perfect order */ rate = info->control.rates[i].idx; if (info->band == IEEE80211_BAND_5GHZ) rate += 4; /* store the count we actually calculated for TX status */ info->control.rates[i].count = calculated_tries[i]; rc_flags = info->control.rates[i].flags; if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) { rate |= 0x10; cts_rate |= 0x10; } if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) rate |= 0x40; else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) rate |= 0x20; for (j = 0; j < calculated_tries[i] && ridx < 8; j++) { txhdr->rateset[ridx] = rate; ridx++; } } if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) hdr_flags |= P54_HDR_FLAG_DATA_OUT_SEQNR; /* TODO: enable bursting */ hdr->flags = cpu_to_le16(hdr_flags); hdr->tries = ridx; txhdr->rts_rate_idx = 0; if (info->control.hw_key) { txhdr->key_type = p54_convert_algo(info->control.hw_key->alg); txhdr->key_len = min((u8)16, info->control.hw_key->keylen); memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len); if (info->control.hw_key->alg == ALG_TKIP) { if (unlikely(skb_tailroom(skb) < 12)) goto err; /* reserve space for the MIC key */ len += 8; memcpy(skb_put(skb, 8), &(info->control.hw_key->key [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8); } /* reserve some space for ICV */ len += info->control.hw_key->icv_len; memset(skb_put(skb, info->control.hw_key->icv_len), 0, info->control.hw_key->icv_len); } else { txhdr->key_type = 0; txhdr->key_len = 0; } txhdr->crypt_offset = crypt_offset; txhdr->hw_queue = queue; if (current_queue) txhdr->backlog = current_queue->len; else txhdr->backlog = 0; memset(txhdr->durations, 0, sizeof(txhdr->durations)); txhdr->tx_antenna = (info->antenna_sel_tx == 0) ? 2 : info->antenna_sel_tx - 1; txhdr->output_power = priv->output_power; txhdr->cts_rate = cts_rate; if (padding) txhdr->align[0] = padding; hdr->len = cpu_to_le16(len); /* modifies skb->cb and with it info, so must be last! */ if (unlikely(p54_assign_address(dev, skb, hdr, skb->len + tim_len))) goto err; priv->tx(dev, skb); queue_delayed_work(dev->workqueue, &priv->work, msecs_to_jiffies(P54_TX_FRAME_LIFETIME)); return 0; err: skb_pull(skb, sizeof(*hdr) + sizeof(*txhdr) + padding); if (current_queue) { current_queue->len--; current_queue->count--; } return NETDEV_TX_BUSY; } static int p54_setup_mac(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_setup_mac *setup; u16 mode; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*setup) + sizeof(struct p54_hdr), P54_CONTROL_TYPE_SETUP, GFP_ATOMIC); if (!skb) return -ENOMEM; setup = (struct p54_setup_mac *) skb_put(skb, sizeof(*setup)); if (dev->conf.radio_enabled) { switch (priv->mode) { case NL80211_IFTYPE_STATION: mode = P54_FILTER_TYPE_STATION; break; case NL80211_IFTYPE_AP: mode = P54_FILTER_TYPE_AP; break; case NL80211_IFTYPE_ADHOC: case NL80211_IFTYPE_MESH_POINT: mode = P54_FILTER_TYPE_IBSS; break; default: mode = P54_FILTER_TYPE_NONE; break; } if (priv->filter_flags & FIF_PROMISC_IN_BSS) mode |= P54_FILTER_TYPE_TRANSPARENT; } else mode = P54_FILTER_TYPE_RX_DISABLED; setup->mac_mode = cpu_to_le16(mode); memcpy(setup->mac_addr, priv->mac_addr, ETH_ALEN); memcpy(setup->bssid, priv->bssid, ETH_ALEN); setup->rx_antenna = 2; /* automatic */ setup->rx_align = 0; if (priv->fw_var < 0x500) { setup->v1.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask); memset(setup->v1.rts_rates, 0, 8); setup->v1.rx_addr = cpu_to_le32(priv->rx_end); setup->v1.max_rx = cpu_to_le16(priv->rx_mtu); setup->v1.rxhw = cpu_to_le16(priv->rxhw); setup->v1.wakeup_timer = cpu_to_le16(priv->wakeup_timer); setup->v1.unalloc0 = cpu_to_le16(0); } else { setup->v2.rx_addr = cpu_to_le32(priv->rx_end); setup->v2.max_rx = cpu_to_le16(priv->rx_mtu); setup->v2.rxhw = cpu_to_le16(priv->rxhw); setup->v2.timer = cpu_to_le16(priv->wakeup_timer); setup->v2.truncate = cpu_to_le16(48896); setup->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask); setup->v2.sbss_offset = 0; setup->v2.mcast_window = 0; setup->v2.rx_rssi_threshold = 0; setup->v2.rx_ed_threshold = 0; setup->v2.ref_clock = cpu_to_le32(644245094); setup->v2.lpf_bandwidth = cpu_to_le16(65535); setup->v2.osc_start_delay = cpu_to_le16(65535); } priv->tx(dev, skb); return 0; } static int p54_scan(struct ieee80211_hw *dev, u16 mode, u16 dwell) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_scan *chan; unsigned int i; void *entry; __le16 freq = cpu_to_le16(dev->conf.channel->center_freq); int band = dev->conf.channel->band; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*chan) + sizeof(struct p54_hdr), P54_CONTROL_TYPE_SCAN, GFP_ATOMIC); if (!skb) return -ENOMEM; chan = (struct p54_scan *) skb_put(skb, sizeof(*chan)); memset(chan->padding1, 0, sizeof(chan->padding1)); chan->mode = cpu_to_le16(mode); chan->dwell = cpu_to_le16(dwell); for (i = 0; i < priv->iq_autocal_len; i++) { if (priv->iq_autocal[i].freq != freq) continue; memcpy(&chan->iq_autocal, &priv->iq_autocal[i], sizeof(*priv->iq_autocal)); break; } if (i == priv->iq_autocal_len) goto err; for (i = 0; i < priv->output_limit_len; i++) { if (priv->output_limit[i].freq != freq) continue; chan->val_barker = 0x38; chan->val_bpsk = chan->dup_bpsk = priv->output_limit[i].val_bpsk; chan->val_qpsk = chan->dup_qpsk = priv->output_limit[i].val_qpsk; chan->val_16qam = chan->dup_16qam = priv->output_limit[i].val_16qam; chan->val_64qam = chan->dup_64qam = priv->output_limit[i].val_64qam; break; } if (i == priv->output_limit_len) goto err; entry = priv->curve_data->data; for (i = 0; i < priv->curve_data->channels; i++) { if (*((__le16 *)entry) != freq) { entry += sizeof(__le16); entry += sizeof(struct p54_pa_curve_data_sample) * priv->curve_data->points_per_channel; continue; } entry += sizeof(__le16); chan->pa_points_per_curve = 8; memset(chan->curve_data, 0, sizeof(*chan->curve_data)); memcpy(chan->curve_data, entry, sizeof(struct p54_pa_curve_data_sample) * min((u8)8, priv->curve_data->points_per_channel)); break; } if (priv->fw_var < 0x500) { chan->v1_rssi.mul = cpu_to_le16(priv->rssical_db[band].mul); chan->v1_rssi.add = cpu_to_le16(priv->rssical_db[band].add); } else { chan->v2.rssi.mul = cpu_to_le16(priv->rssical_db[band].mul); chan->v2.rssi.add = cpu_to_le16(priv->rssical_db[band].add); chan->v2.basic_rate_mask = cpu_to_le32(priv->basic_rate_mask); memset(chan->v2.rts_rates, 0, 8); } priv->tx(dev, skb); return 0; err: printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy)); p54_free_skb(dev, skb); return -EINVAL; } static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_led *led; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*led) + sizeof(struct p54_hdr), P54_CONTROL_TYPE_LED, GFP_ATOMIC); if (!skb) return -ENOMEM; led = (struct p54_led *)skb_put(skb, sizeof(*led)); led->mode = cpu_to_le16(mode); led->led_permanent = cpu_to_le16(link); led->led_temporary = cpu_to_le16(act); led->duration = cpu_to_le16(1000); priv->tx(dev, skb); return 0; } #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop) \ do { \ queue.aifs = cpu_to_le16(ai_fs); \ queue.cwmin = cpu_to_le16(cw_min); \ queue.cwmax = cpu_to_le16(cw_max); \ queue.txop = cpu_to_le16(_txop); \ } while(0) static int p54_set_edcf(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_edcf *edcf; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*edcf) + sizeof(struct p54_hdr), P54_CONTROL_TYPE_DCFINIT, GFP_ATOMIC); if (!skb) return -ENOMEM; edcf = (struct p54_edcf *)skb_put(skb, sizeof(*edcf)); if (priv->use_short_slot) { edcf->slottime = 9; edcf->sifs = 0x10; edcf->eofpad = 0x00; } else { edcf->slottime = 20; edcf->sifs = 0x0a; edcf->eofpad = 0x06; } /* (see prism54/isl_oid.h for further details) */ edcf->frameburst = cpu_to_le16(0); edcf->round_trip_delay = cpu_to_le16(0); edcf->flags = 0; memset(edcf->mapping, 0, sizeof(edcf->mapping)); memcpy(edcf->queue, priv->qos_params, sizeof(edcf->queue)); priv->tx(dev, skb); return 0; } static int p54_beacon_tim(struct sk_buff *skb) { /* * the good excuse for this mess is ... the firmware. * The dummy TIM MUST be at the end of the beacon frame, * because it'll be overwritten! */ struct ieee80211_mgmt *mgmt = (void *)skb->data; u8 *pos, *end; if (skb->len <= sizeof(mgmt)) return -EINVAL; pos = (u8 *)mgmt->u.beacon.variable; end = skb->data + skb->len; while (pos < end) { if (pos + 2 + pos[1] > end) return -EINVAL; if (pos[0] == WLAN_EID_TIM) { u8 dtim_len = pos[1]; u8 dtim_period = pos[3]; u8 *next = pos + 2 + dtim_len; if (dtim_len < 3) return -EINVAL; memmove(pos, next, end - next); if (dtim_len > 3) skb_trim(skb, skb->len - (dtim_len - 3)); pos = end - (dtim_len + 2); /* add the dummy at the end */ pos[0] = WLAN_EID_TIM; pos[1] = 3; pos[2] = 0; pos[3] = dtim_period; pos[4] = 0; return 0; } pos += 2 + pos[1]; } return 0; } static int p54_beacon_update(struct ieee80211_hw *dev, struct ieee80211_vif *vif) { struct p54_common *priv = dev->priv; struct sk_buff *beacon; int ret; if (priv->cached_beacon) { p54_tx_cancel(dev, priv->cached_beacon); /* wait for the last beacon the be freed */ msleep(10); } beacon = ieee80211_beacon_get(dev, vif); if (!beacon) return -ENOMEM; ret = p54_beacon_tim(beacon); if (ret) return ret; ret = p54_tx(dev, beacon); if (ret) return ret; priv->cached_beacon = beacon; priv->tsf_high32 = 0; priv->tsf_low32 = 0; return 0; } static int p54_start(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; int err; mutex_lock(&priv->conf_mutex); err = priv->open(dev); if (err) goto out; P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47); P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94); P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0); P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0); err = p54_set_edcf(dev); if (err) goto out; memset(priv->bssid, ~0, ETH_ALEN); priv->mode = NL80211_IFTYPE_MONITOR; err = p54_setup_mac(dev); if (err) { priv->mode = NL80211_IFTYPE_UNSPECIFIED; goto out; } queue_delayed_work(dev->workqueue, &priv->work, 0); out: mutex_unlock(&priv->conf_mutex); return err; } static void p54_stop(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; struct sk_buff *skb; mutex_lock(&priv->conf_mutex); priv->mode = NL80211_IFTYPE_UNSPECIFIED; cancel_delayed_work_sync(&priv->work); if (priv->cached_beacon) p54_tx_cancel(dev, priv->cached_beacon); priv->stop(dev); while ((skb = skb_dequeue(&priv->tx_queue))) kfree_skb(skb); priv->cached_beacon = NULL; priv->tsf_high32 = priv->tsf_low32 = 0; mutex_unlock(&priv->conf_mutex); } static int p54_add_interface(struct ieee80211_hw *dev, struct ieee80211_if_init_conf *conf) { struct p54_common *priv = dev->priv; mutex_lock(&priv->conf_mutex); if (priv->mode != NL80211_IFTYPE_MONITOR) { mutex_unlock(&priv->conf_mutex); return -EOPNOTSUPP; } switch (conf->type) { case NL80211_IFTYPE_STATION: case NL80211_IFTYPE_ADHOC: case NL80211_IFTYPE_AP: case NL80211_IFTYPE_MESH_POINT: priv->mode = conf->type; break; default: mutex_unlock(&priv->conf_mutex); return -EOPNOTSUPP; } memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN); p54_setup_mac(dev); p54_set_leds(dev, 1, 0, 0); mutex_unlock(&priv->conf_mutex); return 0; } static void p54_remove_interface(struct ieee80211_hw *dev, struct ieee80211_if_init_conf *conf) { struct p54_common *priv = dev->priv; mutex_lock(&priv->conf_mutex); if (priv->cached_beacon) p54_tx_cancel(dev, priv->cached_beacon); priv->mode = NL80211_IFTYPE_MONITOR; memset(priv->mac_addr, 0, ETH_ALEN); memset(priv->bssid, 0, ETH_ALEN); p54_setup_mac(dev); mutex_unlock(&priv->conf_mutex); } static int p54_config(struct ieee80211_hw *dev, u32 changed) { int ret = 0; struct p54_common *priv = dev->priv; struct ieee80211_conf *conf = &dev->conf; mutex_lock(&priv->conf_mutex); if (changed & IEEE80211_CONF_CHANGE_POWER) priv->output_power = conf->power_level << 2; if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) { ret = p54_setup_mac(dev); if (ret) goto out; } if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { ret = p54_scan(dev, P54_SCAN_EXIT, 0); if (ret) goto out; } out: mutex_unlock(&priv->conf_mutex); return ret; } static int p54_config_interface(struct ieee80211_hw *dev, struct ieee80211_vif *vif, struct ieee80211_if_conf *conf) { struct p54_common *priv = dev->priv; int ret = 0; mutex_lock(&priv->conf_mutex); if (conf->changed & IEEE80211_IFCC_BSSID) { memcpy(priv->bssid, conf->bssid, ETH_ALEN); ret = p54_setup_mac(dev); if (ret) goto out; } if (conf->changed & IEEE80211_IFCC_BEACON) { ret = p54_scan(dev, P54_SCAN_EXIT, 0); if (ret) goto out; ret = p54_setup_mac(dev); if (ret) goto out; ret = p54_beacon_update(dev, vif); if (ret) goto out; ret = p54_set_edcf(dev); if (ret) goto out; } ret = p54_set_leds(dev, 1, !is_multicast_ether_addr(priv->bssid), 0); out: mutex_unlock(&priv->conf_mutex); return ret; } static void p54_configure_filter(struct ieee80211_hw *dev, unsigned int changed_flags, unsigned int *total_flags, int mc_count, struct dev_mc_list *mclist) { struct p54_common *priv = dev->priv; *total_flags &= FIF_PROMISC_IN_BSS | (*total_flags & FIF_PROMISC_IN_BSS) ? FIF_FCSFAIL : 0; priv->filter_flags = *total_flags; if (changed_flags & FIF_PROMISC_IN_BSS) p54_setup_mac(dev); } static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue, const struct ieee80211_tx_queue_params *params) { struct p54_common *priv = dev->priv; int ret; mutex_lock(&priv->conf_mutex); if ((params) && !(queue > 4)) { P54_SET_QUEUE(priv->qos_params[queue], params->aifs, params->cw_min, params->cw_max, params->txop); ret = p54_set_edcf(dev); } else ret = -EINVAL; mutex_unlock(&priv->conf_mutex); return ret; } static int p54_init_xbow_synth(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_xbow_synth *xbow; skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*xbow) + sizeof(struct p54_hdr), P54_CONTROL_TYPE_XBOW_SYNTH_CFG, GFP_KERNEL); if (!skb) return -ENOMEM; xbow = (struct p54_xbow_synth *)skb_put(skb, sizeof(*xbow)); xbow->magic1 = cpu_to_le16(0x1); xbow->magic2 = cpu_to_le16(0x2); xbow->freq = cpu_to_le16(5390); memset(xbow->padding, 0, sizeof(xbow->padding)); priv->tx(dev, skb); return 0; } static void p54_work(struct work_struct *work) { struct p54_common *priv = container_of(work, struct p54_common, work.work); struct ieee80211_hw *dev = priv->hw; struct sk_buff *skb; if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) return ; /* * TODO: walk through tx_queue and do the following tasks * 1. initiate bursts. * 2. cancel stuck frames / reset the device if necessary. */ skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL, sizeof(struct p54_hdr) + sizeof(struct p54_statistics), P54_CONTROL_TYPE_STAT_READBACK, GFP_KERNEL); if (!skb) return ; priv->tx(dev, skb); } static int p54_get_stats(struct ieee80211_hw *dev, struct ieee80211_low_level_stats *stats) { struct p54_common *priv = dev->priv; memcpy(stats, &priv->stats, sizeof(*stats)); return 0; } static int p54_get_tx_stats(struct ieee80211_hw *dev, struct ieee80211_tx_queue_stats *stats) { struct p54_common *priv = dev->priv; memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues); return 0; } static void p54_bss_info_changed(struct ieee80211_hw *dev, struct ieee80211_vif *vif, struct ieee80211_bss_conf *info, u32 changed) { struct p54_common *priv = dev->priv; if (changed & BSS_CHANGED_ERP_SLOT) { priv->use_short_slot = info->use_short_slot; p54_set_edcf(dev); } if (changed & BSS_CHANGED_BASIC_RATES) { if (dev->conf.channel->band == IEEE80211_BAND_5GHZ) priv->basic_rate_mask = (info->basic_rates << 4); else priv->basic_rate_mask = info->basic_rates; p54_setup_mac(dev); if (priv->fw_var >= 0x500) p54_scan(dev, P54_SCAN_EXIT, 0); } if (changed & BSS_CHANGED_ASSOC) { if (info->assoc) { priv->aid = info->aid; priv->wakeup_timer = info->beacon_int * info->dtim_period * 5; p54_setup_mac(dev); } } } static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, const u8 *local_address, const u8 *address, struct ieee80211_key_conf *key) { struct p54_common *priv = dev->priv; struct sk_buff *skb; struct p54_keycache *rxkey; u8 algo = 0; if (modparam_nohwcrypt) return -EOPNOTSUPP; if (cmd == DISABLE_KEY) algo = 0; else { switch (key->alg) { case ALG_TKIP: if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL | BR_DESC_PRIV_CAP_TKIP))) return -EOPNOTSUPP; key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; algo = P54_CRYPTO_TKIPMICHAEL; break; case ALG_WEP: if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) return -EOPNOTSUPP; key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; algo = P54_CRYPTO_WEP; break; case ALG_CCMP: if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) return -EOPNOTSUPP; key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; algo = P54_CRYPTO_AESCCMP; break; default: return -EOPNOTSUPP; } } if (key->keyidx > priv->rx_keycache_size) { /* * The device supports the choosen algorithm, but the firmware * does not provide enough key slots to store all of them. * So, incoming frames have to be decoded by the mac80211 stack, * but we can still offload encryption for outgoing frames. */ return 0; } mutex_lock(&priv->conf_mutex); skb = p54_alloc_skb(dev, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*rxkey) + sizeof(struct p54_hdr), P54_CONTROL_TYPE_RX_KEYCACHE, GFP_ATOMIC); if (!skb) { mutex_unlock(&priv->conf_mutex); return -ENOMEM; } /* TODO: some devices have 4 more free slots for rx keys */ rxkey = (struct p54_keycache *)skb_put(skb, sizeof(*rxkey)); rxkey->entry = key->keyidx; rxkey->key_id = key->keyidx; rxkey->key_type = algo; if (address) memcpy(rxkey->mac, address, ETH_ALEN); else memset(rxkey->mac, ~0, ETH_ALEN); if (key->alg != ALG_TKIP) { rxkey->key_len = min((u8)16, key->keylen); memcpy(rxkey->key, key->key, rxkey->key_len); } else { rxkey->key_len = 24; memcpy(rxkey->key, key->key, 16); memcpy(&(rxkey->key[16]), &(key->key [NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY]), 8); } priv->tx(dev, skb); mutex_unlock(&priv->conf_mutex); return 0; } static const struct ieee80211_ops p54_ops = { .tx = p54_tx, .start = p54_start, .stop = p54_stop, .add_interface = p54_add_interface, .remove_interface = p54_remove_interface, .set_tim = p54_set_tim, .sta_notify = p54_sta_notify, .set_key = p54_set_key, .config = p54_config, .config_interface = p54_config_interface, .bss_info_changed = p54_bss_info_changed, .configure_filter = p54_configure_filter, .conf_tx = p54_conf_tx, .get_stats = p54_get_stats, .get_tx_stats = p54_get_tx_stats }; struct ieee80211_hw *p54_init_common(size_t priv_data_len) { struct ieee80211_hw *dev; struct p54_common *priv; dev = ieee80211_alloc_hw(priv_data_len, &p54_ops); if (!dev) return NULL; priv = dev->priv; priv->hw = dev; priv->mode = NL80211_IFTYPE_UNSPECIFIED; priv->basic_rate_mask = 0x15f; skb_queue_head_init(&priv->tx_queue); dev->flags = IEEE80211_HW_RX_INCLUDES_FCS | IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM; dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP) | BIT(NL80211_IFTYPE_MESH_POINT); dev->channel_change_time = 1000; /* TODO: find actual value */ priv->tx_stats[0].limit = 1; /* Beacon queue */ priv->tx_stats[1].limit = 1; /* Probe queue for HW scan */ priv->tx_stats[2].limit = 3; /* queue for MLMEs */ priv->tx_stats[3].limit = 3; /* Broadcast / MC queue */ priv->tx_stats[4].limit = 5; /* Data */ dev->queues = 1; priv->noise = -94; /* * We support at most 8 tries no matter which rate they're at, * we cannot support max_rates * max_rate_tries as we set it * here, but setting it correctly to 4/2 or so would limit us * artificially if the RC algorithm wants just two rates, so * let's say 4/7, we'll redistribute it at TX time, see the * comments there. */ dev->max_rates = 4; dev->max_rate_tries = 7; dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 + sizeof(struct p54_tx_data); mutex_init(&priv->conf_mutex); init_completion(&priv->eeprom_comp); INIT_DELAYED_WORK(&priv->work, p54_work); return dev; } EXPORT_SYMBOL_GPL(p54_init_common); void p54_free_common(struct ieee80211_hw *dev) { struct p54_common *priv = dev->priv; kfree(priv->iq_autocal); kfree(priv->output_limit); kfree(priv->curve_data); } EXPORT_SYMBOL_GPL(p54_free_common); static int __init p54_init(void) { return 0; } static void __exit p54_exit(void) { } module_init(p54_init); module_exit(p54_exit);