/* * drivers/net/wireless/mwl8k.c driver for Marvell TOPDOG 802.11 Wireless cards * * Copyright (C) 2008 Marvell Semiconductor Inc. * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define MWL8K_DESC "Marvell TOPDOG(R) 802.11 Wireless Network Driver" #define MWL8K_NAME KBUILD_MODNAME #define MWL8K_VERSION "0.9.1" MODULE_DESCRIPTION(MWL8K_DESC); MODULE_VERSION(MWL8K_VERSION); MODULE_AUTHOR("Lennert Buytenhek "); MODULE_LICENSE("GPL"); static DEFINE_PCI_DEVICE_TABLE(mwl8k_table) = { { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = 8687, }, { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = 8687, }, { } }; MODULE_DEVICE_TABLE(pci, mwl8k_table); /* Register definitions */ #define MWL8K_HIU_GEN_PTR 0x00000c10 #define MWL8K_MODE_STA 0x0000005a #define MWL8K_MODE_AP 0x000000a5 #define MWL8K_HIU_INT_CODE 0x00000c14 #define MWL8K_FWSTA_READY 0xf0f1f2f4 #define MWL8K_FWAP_READY 0xf1f2f4a5 #define MWL8K_INT_CODE_CMD_FINISHED 0x00000005 #define MWL8K_HIU_SCRATCH 0x00000c40 /* Host->device communications */ #define MWL8K_HIU_H2A_INTERRUPT_EVENTS 0x00000c18 #define MWL8K_HIU_H2A_INTERRUPT_STATUS 0x00000c1c #define MWL8K_HIU_H2A_INTERRUPT_MASK 0x00000c20 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL 0x00000c24 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK 0x00000c28 #define MWL8K_H2A_INT_DUMMY (1 << 20) #define MWL8K_H2A_INT_RESET (1 << 15) #define MWL8K_H2A_INT_DOORBELL (1 << 1) #define MWL8K_H2A_INT_PPA_READY (1 << 0) /* Device->host communications */ #define MWL8K_HIU_A2H_INTERRUPT_EVENTS 0x00000c2c #define MWL8K_HIU_A2H_INTERRUPT_STATUS 0x00000c30 #define MWL8K_HIU_A2H_INTERRUPT_MASK 0x00000c34 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL 0x00000c38 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK 0x00000c3c #define MWL8K_A2H_INT_DUMMY (1 << 20) #define MWL8K_A2H_INT_CHNL_SWITCHED (1 << 11) #define MWL8K_A2H_INT_QUEUE_EMPTY (1 << 10) #define MWL8K_A2H_INT_RADAR_DETECT (1 << 7) #define MWL8K_A2H_INT_RADIO_ON (1 << 6) #define MWL8K_A2H_INT_RADIO_OFF (1 << 5) #define MWL8K_A2H_INT_MAC_EVENT (1 << 3) #define MWL8K_A2H_INT_OPC_DONE (1 << 2) #define MWL8K_A2H_INT_RX_READY (1 << 1) #define MWL8K_A2H_INT_TX_DONE (1 << 0) #define MWL8K_A2H_EVENTS (MWL8K_A2H_INT_DUMMY | \ MWL8K_A2H_INT_CHNL_SWITCHED | \ MWL8K_A2H_INT_QUEUE_EMPTY | \ MWL8K_A2H_INT_RADAR_DETECT | \ MWL8K_A2H_INT_RADIO_ON | \ MWL8K_A2H_INT_RADIO_OFF | \ MWL8K_A2H_INT_MAC_EVENT | \ MWL8K_A2H_INT_OPC_DONE | \ MWL8K_A2H_INT_RX_READY | \ MWL8K_A2H_INT_TX_DONE) /* WME stream classes */ #define WME_AC_BE 0 /* best effort */ #define WME_AC_BK 1 /* background */ #define WME_AC_VI 2 /* video */ #define WME_AC_VO 3 /* voice */ #define MWL8K_RX_QUEUES 1 #define MWL8K_TX_QUEUES 4 struct mwl8k_rx_queue { int rx_desc_count; /* hw receives here */ int rx_head; /* refill descs here */ int rx_tail; struct mwl8k_rx_desc *rx_desc_area; dma_addr_t rx_desc_dma; struct sk_buff **rx_skb; }; struct mwl8k_skb { /* * The DMA engine requires a modification to the payload. * If the skbuff is shared/cloned, it needs to be unshared. * This method is used to ensure the stack always gets back * the skbuff it sent for transmission. */ struct sk_buff *clone; struct sk_buff *skb; }; struct mwl8k_tx_queue { /* hw transmits here */ int tx_head; /* sw appends here */ int tx_tail; struct ieee80211_tx_queue_stats tx_stats; struct mwl8k_tx_desc *tx_desc_area; dma_addr_t tx_desc_dma; struct mwl8k_skb *tx_skb; }; /* Pointers to the firmware data and meta information about it. */ struct mwl8k_firmware { /* Microcode */ struct firmware *ucode; /* Boot helper code */ struct firmware *helper; }; struct mwl8k_priv { void __iomem *regs; struct ieee80211_hw *hw; struct pci_dev *pdev; u8 name[16]; /* firmware access lock */ spinlock_t fw_lock; /* firmware files and meta data */ struct mwl8k_firmware fw; u32 part_num; /* lock held over TX and TX reap */ spinlock_t tx_lock; struct ieee80211_vif *vif; struct ieee80211_channel *current_channel; /* power management status cookie from firmware */ u32 *cookie; dma_addr_t cookie_dma; u16 num_mcaddrs; u8 hw_rev; __le32 fw_rev; /* * Running count of TX packets in flight, to avoid * iterating over the transmit rings each time. */ int pending_tx_pkts; struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES]; struct mwl8k_tx_queue txq[MWL8K_TX_QUEUES]; /* PHY parameters */ struct ieee80211_supported_band band; struct ieee80211_channel channels[14]; struct ieee80211_rate rates[12]; /* RF preamble: Short, Long or Auto */ u8 radio_preamble; u8 radio_state; /* WMM MODE 1 for enabled; 0 for disabled */ bool wmm_mode; /* Set if PHY config is in progress */ bool inconfig; /* XXX need to convert this to handle multiple interfaces */ bool capture_beacon; u8 capture_bssid[ETH_ALEN]; struct sk_buff *beacon_skb; /* * This FJ worker has to be global as it is scheduled from the * RX handler. At this point we don't know which interface it * belongs to until the list of bssids waiting to complete join * is checked. */ struct work_struct finalize_join_worker; /* Tasklet to reclaim TX descriptors and buffers after tx */ struct tasklet_struct tx_reclaim_task; /* Work thread to serialize configuration requests */ struct workqueue_struct *config_wq; struct completion *hostcmd_wait; struct completion *tx_wait; }; /* Per interface specific private data */ struct mwl8k_vif { /* backpointer to parent config block */ struct mwl8k_priv *priv; /* BSS config of AP or IBSS from mac80211*/ struct ieee80211_bss_conf bss_info; /* BSSID of AP or IBSS */ u8 bssid[ETH_ALEN]; u8 mac_addr[ETH_ALEN]; /* * Subset of supported legacy rates. * Intersection of AP and STA supported rates. */ struct ieee80211_rate legacy_rates[12]; /* number of supported legacy rates */ u8 legacy_nrates; /* Index into station database.Returned by update_sta_db call */ u8 peer_id; /* Non AMPDU sequence number assigned by driver */ u16 seqno; }; #define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv)) static const struct ieee80211_channel mwl8k_channels[] = { { .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, }, }; static const struct ieee80211_rate mwl8k_rates[] = { { .bitrate = 10, .hw_value = 2, }, { .bitrate = 20, .hw_value = 4, }, { .bitrate = 55, .hw_value = 11, }, { .bitrate = 60, .hw_value = 12, }, { .bitrate = 90, .hw_value = 18, }, { .bitrate = 110, .hw_value = 22, }, { .bitrate = 120, .hw_value = 24, }, { .bitrate = 180, .hw_value = 36, }, { .bitrate = 240, .hw_value = 48, }, { .bitrate = 360, .hw_value = 72, }, { .bitrate = 480, .hw_value = 96, }, { .bitrate = 540, .hw_value = 108, }, }; /* Radio settings */ #define MWL8K_RADIO_FORCE 0x2 #define MWL8K_RADIO_ENABLE 0x1 #define MWL8K_RADIO_DISABLE 0x0 #define MWL8K_RADIO_AUTO_PREAMBLE 0x0005 #define MWL8K_RADIO_SHORT_PREAMBLE 0x0003 #define MWL8K_RADIO_LONG_PREAMBLE 0x0001 /* WMM */ #define MWL8K_WMM_ENABLE 1 #define MWL8K_WMM_DISABLE 0 #define MWL8K_RADIO_DEFAULT_PREAMBLE MWL8K_RADIO_LONG_PREAMBLE /* Slot time */ /* Short Slot: 9us slot time */ #define MWL8K_SHORT_SLOTTIME 1 /* Long slot: 20us slot time */ #define MWL8K_LONG_SLOTTIME 0 /* Set or get info from Firmware */ #define MWL8K_CMD_SET 0x0001 #define MWL8K_CMD_GET 0x0000 /* Firmware command codes */ #define MWL8K_CMD_CODE_DNLD 0x0001 #define MWL8K_CMD_GET_HW_SPEC 0x0003 #define MWL8K_CMD_MAC_MULTICAST_ADR 0x0010 #define MWL8K_CMD_GET_STAT 0x0014 #define MWL8K_CMD_RADIO_CONTROL 0x001c #define MWL8K_CMD_RF_TX_POWER 0x001e #define MWL8K_CMD_SET_PRE_SCAN 0x0107 #define MWL8K_CMD_SET_POST_SCAN 0x0108 #define MWL8K_CMD_SET_RF_CHANNEL 0x010a #define MWL8K_CMD_SET_AID 0x010d #define MWL8K_CMD_SET_RATE 0x0110 #define MWL8K_CMD_SET_FINALIZE_JOIN 0x0111 #define MWL8K_CMD_RTS_THRESHOLD 0x0113 #define MWL8K_CMD_SET_SLOT 0x0114 #define MWL8K_CMD_SET_EDCA_PARAMS 0x0115 #define MWL8K_CMD_SET_WMM_MODE 0x0123 #define MWL8K_CMD_MIMO_CONFIG 0x0125 #define MWL8K_CMD_USE_FIXED_RATE 0x0126 #define MWL8K_CMD_ENABLE_SNIFFER 0x0150 #define MWL8K_CMD_SET_RATEADAPT_MODE 0x0203 #define MWL8K_CMD_UPDATE_STADB 0x1123 static const char *mwl8k_cmd_name(u16 cmd, char *buf, int bufsize) { #define MWL8K_CMDNAME(x) case MWL8K_CMD_##x: do {\ snprintf(buf, bufsize, "%s", #x);\ return buf;\ } while (0) switch (cmd & (~0x8000)) { MWL8K_CMDNAME(CODE_DNLD); MWL8K_CMDNAME(GET_HW_SPEC); MWL8K_CMDNAME(MAC_MULTICAST_ADR); MWL8K_CMDNAME(GET_STAT); MWL8K_CMDNAME(RADIO_CONTROL); MWL8K_CMDNAME(RF_TX_POWER); MWL8K_CMDNAME(SET_PRE_SCAN); MWL8K_CMDNAME(SET_POST_SCAN); MWL8K_CMDNAME(SET_RF_CHANNEL); MWL8K_CMDNAME(SET_AID); MWL8K_CMDNAME(SET_RATE); MWL8K_CMDNAME(SET_FINALIZE_JOIN); MWL8K_CMDNAME(RTS_THRESHOLD); MWL8K_CMDNAME(SET_SLOT); MWL8K_CMDNAME(SET_EDCA_PARAMS); MWL8K_CMDNAME(SET_WMM_MODE); MWL8K_CMDNAME(MIMO_CONFIG); MWL8K_CMDNAME(USE_FIXED_RATE); MWL8K_CMDNAME(ENABLE_SNIFFER); MWL8K_CMDNAME(SET_RATEADAPT_MODE); MWL8K_CMDNAME(UPDATE_STADB); default: snprintf(buf, bufsize, "0x%x", cmd); } #undef MWL8K_CMDNAME return buf; } /* Hardware and firmware reset */ static void mwl8k_hw_reset(struct mwl8k_priv *priv) { iowrite32(MWL8K_H2A_INT_RESET, priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); iowrite32(MWL8K_H2A_INT_RESET, priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); msleep(20); } /* Release fw image */ static void mwl8k_release_fw(struct firmware **fw) { if (*fw == NULL) return; release_firmware(*fw); *fw = NULL; } static void mwl8k_release_firmware(struct mwl8k_priv *priv) { mwl8k_release_fw(&priv->fw.ucode); mwl8k_release_fw(&priv->fw.helper); } /* Request fw image */ static int mwl8k_request_fw(struct mwl8k_priv *priv, const char *fname, struct firmware **fw) { /* release current image */ if (*fw != NULL) mwl8k_release_fw(fw); return request_firmware((const struct firmware **)fw, fname, &priv->pdev->dev); } static int mwl8k_request_firmware(struct mwl8k_priv *priv, u32 part_num) { u8 filename[64]; int rc; priv->part_num = part_num; snprintf(filename, sizeof(filename), "mwl8k/helper_%u.fw", priv->part_num); rc = mwl8k_request_fw(priv, filename, &priv->fw.helper); if (rc) { printk(KERN_ERR "%s Error requesting helper firmware file %s\n", pci_name(priv->pdev), filename); return rc; } snprintf(filename, sizeof(filename), "mwl8k/fmimage_%u.fw", priv->part_num); rc = mwl8k_request_fw(priv, filename, &priv->fw.ucode); if (rc) { printk(KERN_ERR "%s Error requesting firmware file %s\n", pci_name(priv->pdev), filename); mwl8k_release_fw(&priv->fw.helper); return rc; } return 0; } struct mwl8k_cmd_pkt { __le16 code; __le16 length; __le16 seq_num; __le16 result; char payload[0]; } __attribute__((packed)); /* * Firmware loading. */ static int mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length) { void __iomem *regs = priv->regs; dma_addr_t dma_addr; int rc; int loops; dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE); if (pci_dma_mapping_error(priv->pdev, dma_addr)) return -ENOMEM; iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR); iowrite32(0, regs + MWL8K_HIU_INT_CODE); iowrite32(MWL8K_H2A_INT_DOORBELL, regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); iowrite32(MWL8K_H2A_INT_DUMMY, regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); rc = -ETIMEDOUT; loops = 1000; do { u32 int_code; int_code = ioread32(regs + MWL8K_HIU_INT_CODE); if (int_code == MWL8K_INT_CODE_CMD_FINISHED) { iowrite32(0, regs + MWL8K_HIU_INT_CODE); rc = 0; break; } udelay(1); } while (--loops); pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE); /* * Clear 'command done' interrupt bit. */ loops = 1000; do { u32 status; status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); if (status & MWL8K_A2H_INT_OPC_DONE) { iowrite32(~MWL8K_A2H_INT_OPC_DONE, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); break; } udelay(1); } while (--loops); return rc; } static int mwl8k_load_fw_image(struct mwl8k_priv *priv, const u8 *data, size_t length) { struct mwl8k_cmd_pkt *cmd; int done; int rc = 0; cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD); cmd->seq_num = 0; cmd->result = 0; done = 0; while (length) { int block_size = length > 256 ? 256 : length; memcpy(cmd->payload, data + done, block_size); cmd->length = cpu_to_le16(block_size); rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd) + block_size); if (rc) break; done += block_size; length -= block_size; } if (!rc) { cmd->length = 0; rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd)); } kfree(cmd); return rc; } static int mwl8k_feed_fw_image(struct mwl8k_priv *priv, const u8 *data, size_t length) { unsigned char *buffer; int may_continue, rc = 0; u32 done, prev_block_size; buffer = kmalloc(1024, GFP_KERNEL); if (buffer == NULL) return -ENOMEM; done = 0; prev_block_size = 0; may_continue = 1000; while (may_continue > 0) { u32 block_size; block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH); if (block_size & 1) { block_size &= ~1; may_continue--; } else { done += prev_block_size; length -= prev_block_size; } if (block_size > 1024 || block_size > length) { rc = -EOVERFLOW; break; } if (length == 0) { rc = 0; break; } if (block_size == 0) { rc = -EPROTO; may_continue--; udelay(1); continue; } prev_block_size = block_size; memcpy(buffer, data + done, block_size); rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size); if (rc) break; } if (!rc && length != 0) rc = -EREMOTEIO; kfree(buffer); return rc; } static int mwl8k_load_firmware(struct mwl8k_priv *priv) { int loops, rc; const u8 *ucode = priv->fw.ucode->data; size_t ucode_len = priv->fw.ucode->size; const u8 *helper = priv->fw.helper->data; size_t helper_len = priv->fw.helper->size; if (!memcmp(ucode, "\x01\x00\x00\x00", 4)) { rc = mwl8k_load_fw_image(priv, helper, helper_len); if (rc) { printk(KERN_ERR "%s: unable to load firmware " "helper image\n", pci_name(priv->pdev)); return rc; } msleep(1); rc = mwl8k_feed_fw_image(priv, ucode, ucode_len); } else { rc = mwl8k_load_fw_image(priv, ucode, ucode_len); } if (rc) { printk(KERN_ERR "%s: unable to load firmware data\n", pci_name(priv->pdev)); return rc; } iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR); msleep(1); loops = 200000; do { if (ioread32(priv->regs + MWL8K_HIU_INT_CODE) == MWL8K_FWSTA_READY) break; udelay(1); } while (--loops); return loops ? 0 : -ETIMEDOUT; } /* * Defines shared between transmission and reception. */ /* HT control fields for firmware */ struct ewc_ht_info { __le16 control1; __le16 control2; __le16 control3; } __attribute__((packed)); /* Firmware Station database operations */ #define MWL8K_STA_DB_ADD_ENTRY 0 #define MWL8K_STA_DB_MODIFY_ENTRY 1 #define MWL8K_STA_DB_DEL_ENTRY 2 #define MWL8K_STA_DB_FLUSH 3 /* Peer Entry flags - used to define the type of the peer node */ #define MWL8K_PEER_TYPE_ACCESSPOINT 2 #define MWL8K_IEEE_LEGACY_DATA_RATES 12 #define MWL8K_MCS_BITMAP_SIZE 16 struct peer_capability_info { /* Peer type - AP vs. STA. */ __u8 peer_type; /* Basic 802.11 capabilities from assoc resp. */ __le16 basic_caps; /* Set if peer supports 802.11n high throughput (HT). */ __u8 ht_support; /* Valid if HT is supported. */ __le16 ht_caps; __u8 extended_ht_caps; struct ewc_ht_info ewc_info; /* Legacy rate table. Intersection of our rates and peer rates. */ __u8 legacy_rates[MWL8K_IEEE_LEGACY_DATA_RATES]; /* HT rate table. Intersection of our rates and peer rates. */ __u8 ht_rates[MWL8K_MCS_BITMAP_SIZE]; __u8 pad[16]; /* If set, interoperability mode, no proprietary extensions. */ __u8 interop; __u8 pad2; __u8 station_id; __le16 amsdu_enabled; } __attribute__((packed)); /* Inline functions to manipulate QoS field in data descriptor. */ static inline u16 mwl8k_qos_setbit_eosp(u16 qos) { u16 val_mask = 1 << 4; /* End of Service Period Bit 4 */ return qos | val_mask; } static inline u16 mwl8k_qos_setbit_ack(u16 qos, u8 ack_policy) { u16 val_mask = 0x3; u8 shift = 5; u16 qos_mask = ~(val_mask << shift); /* Ack Policy Bit 5-6 */ return (qos & qos_mask) | ((ack_policy & val_mask) << shift); } static inline u16 mwl8k_qos_setbit_amsdu(u16 qos) { u16 val_mask = 1 << 7; /* AMSDU present Bit 7 */ return qos | val_mask; } static inline u16 mwl8k_qos_setbit_qlen(u16 qos, u8 len) { u16 val_mask = 0xff; u8 shift = 8; u16 qos_mask = ~(val_mask << shift); /* Queue Length Bits 8-15 */ return (qos & qos_mask) | ((len & val_mask) << shift); } /* DMA header used by firmware and hardware. */ struct mwl8k_dma_data { __le16 fwlen; struct ieee80211_hdr wh; } __attribute__((packed)); /* Routines to add/remove DMA header from skb. */ static inline int mwl8k_remove_dma_header(struct sk_buff *skb) { struct mwl8k_dma_data *tr = (struct mwl8k_dma_data *)(skb->data); void *dst, *src = &tr->wh; __le16 fc = tr->wh.frame_control; int hdrlen = ieee80211_hdrlen(fc); u16 space = sizeof(struct mwl8k_dma_data) - hdrlen; dst = (void *)tr + space; if (dst != src) { memmove(dst, src, hdrlen); skb_pull(skb, space); } return 0; } static inline struct sk_buff *mwl8k_add_dma_header(struct sk_buff *skb) { struct ieee80211_hdr *wh; u32 hdrlen, pktlen; struct mwl8k_dma_data *tr; wh = (struct ieee80211_hdr *)skb->data; hdrlen = ieee80211_hdrlen(wh->frame_control); pktlen = skb->len; /* * Copy up/down the 802.11 header; the firmware requires * we present a 2-byte payload length followed by a * 4-address header (w/o QoS), followed (optionally) by * any WEP/ExtIV header (but only filled in for CCMP). */ if (hdrlen != sizeof(struct mwl8k_dma_data)) skb_push(skb, sizeof(struct mwl8k_dma_data) - hdrlen); tr = (struct mwl8k_dma_data *)skb->data; if (wh != &tr->wh) memmove(&tr->wh, wh, hdrlen); /* Clear addr4 */ memset(tr->wh.addr4, 0, ETH_ALEN); /* * Firmware length is the length of the fully formed "802.11 * payload". That is, everything except for the 802.11 header. * This includes all crypto material including the MIC. */ tr->fwlen = cpu_to_le16(pktlen - hdrlen); return skb; } /* * Packet reception. */ #define MWL8K_RX_CTRL_OWNED_BY_HOST 0x02 struct mwl8k_rx_desc { __le16 pkt_len; __u8 link_quality; __u8 noise_level; __le32 pkt_phys_addr; __le32 next_rx_desc_phys_addr; __le16 qos_control; __le16 rate_info; __le32 pad0[4]; __u8 rssi; __u8 channel; __le16 pad1; __u8 rx_ctrl; __u8 rx_status; __u8 pad2[2]; } __attribute__((packed)); #define MWL8K_RX_DESCS 256 #define MWL8K_RX_MAXSZ 3800 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_rx_queue *rxq = priv->rxq + index; int size; int i; rxq->rx_desc_count = 0; rxq->rx_head = 0; rxq->rx_tail = 0; size = MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc); rxq->rx_desc_area = pci_alloc_consistent(priv->pdev, size, &rxq->rx_desc_dma); if (rxq->rx_desc_area == NULL) { printk(KERN_ERR "%s: failed to alloc RX descriptors\n", priv->name); return -ENOMEM; } memset(rxq->rx_desc_area, 0, size); rxq->rx_skb = kmalloc(MWL8K_RX_DESCS * sizeof(*rxq->rx_skb), GFP_KERNEL); if (rxq->rx_skb == NULL) { printk(KERN_ERR "%s: failed to alloc RX skbuff list\n", priv->name); pci_free_consistent(priv->pdev, size, rxq->rx_desc_area, rxq->rx_desc_dma); return -ENOMEM; } memset(rxq->rx_skb, 0, MWL8K_RX_DESCS * sizeof(*rxq->rx_skb)); for (i = 0; i < MWL8K_RX_DESCS; i++) { struct mwl8k_rx_desc *rx_desc; int nexti; rx_desc = rxq->rx_desc_area + i; nexti = (i + 1) % MWL8K_RX_DESCS; rx_desc->next_rx_desc_phys_addr = cpu_to_le32(rxq->rx_desc_dma + nexti * sizeof(*rx_desc)); rx_desc->rx_ctrl = MWL8K_RX_CTRL_OWNED_BY_HOST; } return 0; } static int rxq_refill(struct ieee80211_hw *hw, int index, int limit) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_rx_queue *rxq = priv->rxq + index; int refilled; refilled = 0; while (rxq->rx_desc_count < MWL8K_RX_DESCS && limit--) { struct sk_buff *skb; int rx; skb = dev_alloc_skb(MWL8K_RX_MAXSZ); if (skb == NULL) break; rxq->rx_desc_count++; rx = rxq->rx_tail; rxq->rx_tail = (rx + 1) % MWL8K_RX_DESCS; rxq->rx_desc_area[rx].pkt_phys_addr = cpu_to_le32(pci_map_single(priv->pdev, skb->data, MWL8K_RX_MAXSZ, DMA_FROM_DEVICE)); rxq->rx_desc_area[rx].pkt_len = cpu_to_le16(MWL8K_RX_MAXSZ); rxq->rx_skb[rx] = skb; wmb(); rxq->rx_desc_area[rx].rx_ctrl = 0; refilled++; } return refilled; } /* Must be called only when the card's reception is completely halted */ static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_rx_queue *rxq = priv->rxq + index; int i; for (i = 0; i < MWL8K_RX_DESCS; i++) { if (rxq->rx_skb[i] != NULL) { unsigned long addr; addr = le32_to_cpu(rxq->rx_desc_area[i].pkt_phys_addr); pci_unmap_single(priv->pdev, addr, MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE); kfree_skb(rxq->rx_skb[i]); rxq->rx_skb[i] = NULL; } } kfree(rxq->rx_skb); rxq->rx_skb = NULL; pci_free_consistent(priv->pdev, MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc), rxq->rx_desc_area, rxq->rx_desc_dma); rxq->rx_desc_area = NULL; } /* * Scan a list of BSSIDs to process for finalize join. * Allows for extension to process multiple BSSIDs. */ static inline int mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh) { return priv->capture_beacon && ieee80211_is_beacon(wh->frame_control) && !compare_ether_addr(wh->addr3, priv->capture_bssid); } static inline void mwl8k_save_beacon(struct mwl8k_priv *priv, struct sk_buff *skb) { priv->capture_beacon = false; memset(priv->capture_bssid, 0, ETH_ALEN); /* * Use GFP_ATOMIC as rxq_process is called from * the primary interrupt handler, memory allocation call * must not sleep. */ priv->beacon_skb = skb_copy(skb, GFP_ATOMIC); if (priv->beacon_skb != NULL) queue_work(priv->config_wq, &priv->finalize_join_worker); } static int rxq_process(struct ieee80211_hw *hw, int index, int limit) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_rx_queue *rxq = priv->rxq + index; int processed; processed = 0; while (rxq->rx_desc_count && limit--) { struct mwl8k_rx_desc *rx_desc; struct sk_buff *skb; struct ieee80211_rx_status status; unsigned long addr; struct ieee80211_hdr *wh; rx_desc = rxq->rx_desc_area + rxq->rx_head; if (!(rx_desc->rx_ctrl & MWL8K_RX_CTRL_OWNED_BY_HOST)) break; rmb(); skb = rxq->rx_skb[rxq->rx_head]; if (skb == NULL) break; rxq->rx_skb[rxq->rx_head] = NULL; rxq->rx_head = (rxq->rx_head + 1) % MWL8K_RX_DESCS; rxq->rx_desc_count--; addr = le32_to_cpu(rx_desc->pkt_phys_addr); pci_unmap_single(priv->pdev, addr, MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE); skb_put(skb, le16_to_cpu(rx_desc->pkt_len)); if (mwl8k_remove_dma_header(skb)) { dev_kfree_skb(skb); continue; } wh = (struct ieee80211_hdr *)skb->data; /* * Check for pending join operation. save a copy of * the beacon and schedule a tasklet to send finalize * join command to the firmware. */ if (mwl8k_capture_bssid(priv, wh)) mwl8k_save_beacon(priv, skb); memset(&status, 0, sizeof(status)); status.mactime = 0; status.signal = -rx_desc->rssi; status.noise = -rx_desc->noise_level; status.qual = rx_desc->link_quality; status.antenna = 1; status.rate_idx = 1; status.flag = 0; status.band = IEEE80211_BAND_2GHZ; status.freq = ieee80211_channel_to_frequency(rx_desc->channel); memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); ieee80211_rx_irqsafe(hw, skb); processed++; } return processed; } /* * Packet transmission. */ /* Transmit queue assignment. */ enum { MWL8K_WME_AC_BK = 0, /* background access */ MWL8K_WME_AC_BE = 1, /* best effort access */ MWL8K_WME_AC_VI = 2, /* video access */ MWL8K_WME_AC_VO = 3, /* voice access */ }; /* Transmit packet ACK policy */ #define MWL8K_TXD_ACK_POLICY_NORMAL 0 #define MWL8K_TXD_ACK_POLICY_BLOCKACK 3 #define GET_TXQ(_ac) (\ ((_ac) == WME_AC_VO) ? MWL8K_WME_AC_VO : \ ((_ac) == WME_AC_VI) ? MWL8K_WME_AC_VI : \ ((_ac) == WME_AC_BK) ? MWL8K_WME_AC_BK : \ MWL8K_WME_AC_BE) #define MWL8K_TXD_STATUS_OK 0x00000001 #define MWL8K_TXD_STATUS_OK_RETRY 0x00000002 #define MWL8K_TXD_STATUS_OK_MORE_RETRY 0x00000004 #define MWL8K_TXD_STATUS_MULTICAST_TX 0x00000008 #define MWL8K_TXD_STATUS_FW_OWNED 0x80000000 struct mwl8k_tx_desc { __le32 status; __u8 data_rate; __u8 tx_priority; __le16 qos_control; __le32 pkt_phys_addr; __le16 pkt_len; __u8 dest_MAC_addr[ETH_ALEN]; __le32 next_tx_desc_phys_addr; __le32 reserved; __le16 rate_info; __u8 peer_id; __u8 tx_frag_cnt; } __attribute__((packed)); #define MWL8K_TX_DESCS 128 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_tx_queue *txq = priv->txq + index; int size; int i; memset(&txq->tx_stats, 0, sizeof(struct ieee80211_tx_queue_stats)); txq->tx_stats.limit = MWL8K_TX_DESCS; txq->tx_head = 0; txq->tx_tail = 0; size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc); txq->tx_desc_area = pci_alloc_consistent(priv->pdev, size, &txq->tx_desc_dma); if (txq->tx_desc_area == NULL) { printk(KERN_ERR "%s: failed to alloc TX descriptors\n", priv->name); return -ENOMEM; } memset(txq->tx_desc_area, 0, size); txq->tx_skb = kmalloc(MWL8K_TX_DESCS * sizeof(*txq->tx_skb), GFP_KERNEL); if (txq->tx_skb == NULL) { printk(KERN_ERR "%s: failed to alloc TX skbuff list\n", priv->name); pci_free_consistent(priv->pdev, size, txq->tx_desc_area, txq->tx_desc_dma); return -ENOMEM; } memset(txq->tx_skb, 0, MWL8K_TX_DESCS * sizeof(*txq->tx_skb)); for (i = 0; i < MWL8K_TX_DESCS; i++) { struct mwl8k_tx_desc *tx_desc; int nexti; tx_desc = txq->tx_desc_area + i; nexti = (i + 1) % MWL8K_TX_DESCS; tx_desc->status = 0; tx_desc->next_tx_desc_phys_addr = cpu_to_le32(txq->tx_desc_dma + nexti * sizeof(*tx_desc)); } return 0; } static inline void mwl8k_tx_start(struct mwl8k_priv *priv) { iowrite32(MWL8K_H2A_INT_PPA_READY, priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); iowrite32(MWL8K_H2A_INT_DUMMY, priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); ioread32(priv->regs + MWL8K_HIU_INT_CODE); } static inline int mwl8k_txq_busy(struct mwl8k_priv *priv) { return priv->pending_tx_pkts; } struct mwl8k_txq_info { u32 fw_owned; u32 drv_owned; u32 unused; u32 len; u32 head; u32 tail; }; static int mwl8k_scan_tx_ring(struct mwl8k_priv *priv, struct mwl8k_txq_info txinfo[], u32 num_queues) { int count, desc, status; struct mwl8k_tx_queue *txq; struct mwl8k_tx_desc *tx_desc; int ndescs = 0; memset(txinfo, 0, num_queues * sizeof(struct mwl8k_txq_info)); spin_lock_bh(&priv->tx_lock); for (count = 0; count < num_queues; count++) { txq = priv->txq + count; txinfo[count].len = txq->tx_stats.len; txinfo[count].head = txq->tx_head; txinfo[count].tail = txq->tx_tail; for (desc = 0; desc < MWL8K_TX_DESCS; desc++) { tx_desc = txq->tx_desc_area + desc; status = le32_to_cpu(tx_desc->status); if (status & MWL8K_TXD_STATUS_FW_OWNED) txinfo[count].fw_owned++; else txinfo[count].drv_owned++; if (tx_desc->pkt_len == 0) txinfo[count].unused++; } } spin_unlock_bh(&priv->tx_lock); return ndescs; } static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw, u32 delay_ms) { u32 count = 0; unsigned long timeout = 0; struct mwl8k_priv *priv = hw->priv; DECLARE_COMPLETION_ONSTACK(cmd_wait); might_sleep(); if (priv->tx_wait != NULL) printk(KERN_ERR "WARNING Previous TXWaitEmpty instance\n"); spin_lock_bh(&priv->tx_lock); count = mwl8k_txq_busy(priv); if (count) { priv->tx_wait = &cmd_wait; if (priv->radio_state) mwl8k_tx_start(priv); } spin_unlock_bh(&priv->tx_lock); if (count) { struct mwl8k_txq_info txinfo[4]; int index; int newcount; timeout = wait_for_completion_timeout(&cmd_wait, msecs_to_jiffies(delay_ms)); if (timeout) return 0; spin_lock_bh(&priv->tx_lock); priv->tx_wait = NULL; newcount = mwl8k_txq_busy(priv); spin_unlock_bh(&priv->tx_lock); printk(KERN_ERR "%s(%u) TIMEDOUT:%ums Pend:%u-->%u\n", __func__, __LINE__, delay_ms, count, newcount); mwl8k_scan_tx_ring(priv, txinfo, 4); for (index = 0 ; index < 4; index++) printk(KERN_ERR "TXQ:%u L:%u H:%u T:%u FW:%u DRV:%u U:%u\n", index, txinfo[index].len, txinfo[index].head, txinfo[index].tail, txinfo[index].fw_owned, txinfo[index].drv_owned, txinfo[index].unused); return -ETIMEDOUT; } return 0; } #define MWL8K_TXD_SUCCESS(status) \ ((status) & (MWL8K_TXD_STATUS_OK | \ MWL8K_TXD_STATUS_OK_RETRY | \ MWL8K_TXD_STATUS_OK_MORE_RETRY)) static void mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int force) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_tx_queue *txq = priv->txq + index; int wake = 0; while (txq->tx_stats.len > 0) { int tx; int rc; struct mwl8k_tx_desc *tx_desc; unsigned long addr; size_t size; struct sk_buff *skb; struct ieee80211_tx_info *info; u32 status; rc = 0; tx = txq->tx_head; tx_desc = txq->tx_desc_area + tx; status = le32_to_cpu(tx_desc->status); if (status & MWL8K_TXD_STATUS_FW_OWNED) { if (!force) break; tx_desc->status &= ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED); } txq->tx_head = (tx + 1) % MWL8K_TX_DESCS; BUG_ON(txq->tx_stats.len == 0); txq->tx_stats.len--; priv->pending_tx_pkts--; addr = le32_to_cpu(tx_desc->pkt_phys_addr); size = (u32)(le16_to_cpu(tx_desc->pkt_len)); skb = txq->tx_skb[tx].skb; txq->tx_skb[tx].skb = NULL; BUG_ON(skb == NULL); pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE); rc = mwl8k_remove_dma_header(skb); /* Mark descriptor as unused */ tx_desc->pkt_phys_addr = 0; tx_desc->pkt_len = 0; if (txq->tx_skb[tx].clone) { /* Replace with original skb * before returning to stack * as buffer has been cloned */ dev_kfree_skb(skb); skb = txq->tx_skb[tx].clone; txq->tx_skb[tx].clone = NULL; } if (rc) { /* Something has gone wrong here. * Failed to remove DMA header. * Print error message and drop packet. */ printk(KERN_ERR "%s: Error removing DMA header from " "tx skb 0x%p.\n", priv->name, skb); dev_kfree_skb(skb); continue; } info = IEEE80211_SKB_CB(skb); ieee80211_tx_info_clear_status(info); /* Convert firmware status stuff into tx_status */ if (MWL8K_TXD_SUCCESS(status)) { /* Transmit OK */ info->flags |= IEEE80211_TX_STAT_ACK; } ieee80211_tx_status_irqsafe(hw, skb); wake = !priv->inconfig && priv->radio_state; } if (wake) ieee80211_wake_queue(hw, index); } /* must be called only when the card's transmit is completely halted */ static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_tx_queue *txq = priv->txq + index; mwl8k_txq_reclaim(hw, index, 1); kfree(txq->tx_skb); txq->tx_skb = NULL; pci_free_consistent(priv->pdev, MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc), txq->tx_desc_area, txq->tx_desc_dma); txq->tx_desc_area = NULL; } static int mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb) { struct mwl8k_priv *priv = hw->priv; struct ieee80211_tx_info *tx_info; struct ieee80211_hdr *wh; struct mwl8k_tx_queue *txq; struct mwl8k_tx_desc *tx; struct mwl8k_dma_data *tr; struct mwl8k_vif *mwl8k_vif; struct sk_buff *org_skb = skb; dma_addr_t dma; u16 qos = 0; bool qosframe = false, ampduframe = false; bool mcframe = false, eapolframe = false; bool amsduframe = false; __le16 fc; txq = priv->txq + index; tx = txq->tx_desc_area + txq->tx_tail; BUG_ON(txq->tx_skb[txq->tx_tail].skb != NULL); /* * Append HW DMA header to start of packet. Drop packet if * there is not enough space or a failure to unshare/unclone * the skb. */ skb = mwl8k_add_dma_header(skb); if (skb == NULL) { printk(KERN_DEBUG "%s: failed to prepend HW DMA " "header, dropping TX frame.\n", priv->name); dev_kfree_skb(org_skb); return NETDEV_TX_OK; } tx_info = IEEE80211_SKB_CB(skb); mwl8k_vif = MWL8K_VIF(tx_info->control.vif); tr = (struct mwl8k_dma_data *)skb->data; wh = &tr->wh; fc = wh->frame_control; qosframe = ieee80211_is_data_qos(fc); mcframe = is_multicast_ether_addr(wh->addr1); ampduframe = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU); if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { u16 seqno = mwl8k_vif->seqno; wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); wh->seq_ctrl |= cpu_to_le16(seqno << 4); mwl8k_vif->seqno = seqno++ % 4096; } if (qosframe) qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh))); dma = pci_map_single(priv->pdev, skb->data, skb->len, PCI_DMA_TODEVICE); if (pci_dma_mapping_error(priv->pdev, dma)) { printk(KERN_DEBUG "%s: failed to dma map skb, " "dropping TX frame.\n", priv->name); if (org_skb != NULL) dev_kfree_skb(org_skb); if (skb != NULL) dev_kfree_skb(skb); return NETDEV_TX_OK; } /* Set desc header, cpu bit order. */ tx->status = 0; tx->data_rate = 0; tx->tx_priority = index; tx->qos_control = 0; tx->rate_info = 0; tx->peer_id = mwl8k_vif->peer_id; amsduframe = !!(qos & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT); /* Setup firmware control bit fields for each frame type. */ if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)) { tx->data_rate = 0; qos = mwl8k_qos_setbit_eosp(qos); /* Set Queue size to unspecified */ qos = mwl8k_qos_setbit_qlen(qos, 0xff); } else if (ieee80211_is_data(fc)) { tx->data_rate = 1; if (mcframe) tx->status |= MWL8K_TXD_STATUS_MULTICAST_TX; /* * Tell firmware to not send EAPOL pkts in an * aggregate. Verify against mac80211 tx path. If * stack turns off AMPDU for an EAPOL frame this * check will be removed. */ if (eapolframe) { qos = mwl8k_qos_setbit_ack(qos, MWL8K_TXD_ACK_POLICY_NORMAL); } else { /* Send pkt in an aggregate if AMPDU frame. */ if (ampduframe) qos = mwl8k_qos_setbit_ack(qos, MWL8K_TXD_ACK_POLICY_BLOCKACK); else qos = mwl8k_qos_setbit_ack(qos, MWL8K_TXD_ACK_POLICY_NORMAL); if (amsduframe) qos = mwl8k_qos_setbit_amsdu(qos); } } /* Convert to little endian */ tx->qos_control = cpu_to_le16(qos); tx->status = cpu_to_le32(tx->status); tx->pkt_phys_addr = cpu_to_le32(dma); tx->pkt_len = cpu_to_le16(skb->len); txq->tx_skb[txq->tx_tail].skb = skb; txq->tx_skb[txq->tx_tail].clone = skb == org_skb ? NULL : org_skb; spin_lock_bh(&priv->tx_lock); tx->status = cpu_to_le32(MWL8K_TXD_STATUS_OK | MWL8K_TXD_STATUS_FW_OWNED); wmb(); txq->tx_stats.len++; priv->pending_tx_pkts++; txq->tx_stats.count++; txq->tx_tail++; if (txq->tx_tail == MWL8K_TX_DESCS) txq->tx_tail = 0; if (txq->tx_head == txq->tx_tail) ieee80211_stop_queue(hw, index); if (priv->inconfig) { /* * Silently queue packet when we are in the middle of * a config cycle. Notify firmware only if we are * waiting for TXQs to empty. If a packet is sent * before .config() is complete, perhaps it is better * to drop the packet, as the channel is being changed * and the packet will end up on the wrong channel. */ printk(KERN_ERR "%s(): WARNING TX activity while " "in config\n", __func__); if (priv->tx_wait != NULL) mwl8k_tx_start(priv); } else mwl8k_tx_start(priv); spin_unlock_bh(&priv->tx_lock); return NETDEV_TX_OK; } /* * Command processing. */ /* Timeout firmware commands after 2000ms */ #define MWL8K_CMD_TIMEOUT_MS 2000 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd) { DECLARE_COMPLETION_ONSTACK(cmd_wait); struct mwl8k_priv *priv = hw->priv; void __iomem *regs = priv->regs; dma_addr_t dma_addr; unsigned int dma_size; int rc; u16 __iomem *result; unsigned long timeout = 0; u8 buf[32]; cmd->result = 0xFFFF; dma_size = le16_to_cpu(cmd->length); dma_addr = pci_map_single(priv->pdev, cmd, dma_size, PCI_DMA_BIDIRECTIONAL); if (pci_dma_mapping_error(priv->pdev, dma_addr)) return -ENOMEM; if (priv->hostcmd_wait != NULL) printk(KERN_ERR "WARNING host command in progress\n"); spin_lock_irq(&priv->fw_lock); priv->hostcmd_wait = &cmd_wait; iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR); iowrite32(MWL8K_H2A_INT_DOORBELL, regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); iowrite32(MWL8K_H2A_INT_DUMMY, regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS); spin_unlock_irq(&priv->fw_lock); timeout = wait_for_completion_timeout(&cmd_wait, msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS)); pci_unmap_single(priv->pdev, dma_addr, dma_size, PCI_DMA_BIDIRECTIONAL); result = &cmd->result; if (!timeout) { spin_lock_irq(&priv->fw_lock); priv->hostcmd_wait = NULL; spin_unlock_irq(&priv->fw_lock); printk(KERN_ERR "%s: Command %s timeout after %u ms\n", priv->name, mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), MWL8K_CMD_TIMEOUT_MS); rc = -ETIMEDOUT; } else { rc = *result ? -EINVAL : 0; if (rc) printk(KERN_ERR "%s: Command %s error 0x%x\n", priv->name, mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), *result); } return rc; } /* * GET_HW_SPEC. */ struct mwl8k_cmd_get_hw_spec { struct mwl8k_cmd_pkt header; __u8 hw_rev; __u8 host_interface; __le16 num_mcaddrs; __u8 perm_addr[ETH_ALEN]; __le16 region_code; __le32 fw_rev; __le32 ps_cookie; __le32 caps; __u8 mcs_bitmap[16]; __le32 rx_queue_ptr; __le32 num_tx_queues; __le32 tx_queue_ptrs[MWL8K_TX_QUEUES]; __le32 caps2; __le32 num_tx_desc_per_queue; __le32 total_rx_desc; } __attribute__((packed)); static int mwl8k_cmd_get_hw_spec(struct ieee80211_hw *hw) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_cmd_get_hw_spec *cmd; int rc; int i; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC); cmd->header.length = cpu_to_le16(sizeof(*cmd)); memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr)); cmd->ps_cookie = cpu_to_le32(priv->cookie_dma); cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rx_desc_dma); cmd->num_tx_queues = cpu_to_le32(MWL8K_TX_QUEUES); for (i = 0; i < MWL8K_TX_QUEUES; i++) cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].tx_desc_dma); cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS); cmd->total_rx_desc = cpu_to_le32(MWL8K_RX_DESCS); rc = mwl8k_post_cmd(hw, &cmd->header); if (!rc) { SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr); priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs); priv->fw_rev = le32_to_cpu(cmd->fw_rev); priv->hw_rev = cmd->hw_rev; } kfree(cmd); return rc; } /* * CMD_MAC_MULTICAST_ADR. */ struct mwl8k_cmd_mac_multicast_adr { struct mwl8k_cmd_pkt header; __le16 action; __le16 numaddr; __u8 addr[1][ETH_ALEN]; }; #define MWL8K_ENABLE_RX_MULTICAST 0x000F static int mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int mc_count, struct dev_addr_list *mclist) { struct mwl8k_cmd_mac_multicast_adr *cmd; int index = 0; int rc; int size = sizeof(*cmd) + ((mc_count - 1) * ETH_ALEN); cmd = kzalloc(size, GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR); cmd->header.length = cpu_to_le16(size); cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST); cmd->numaddr = cpu_to_le16(mc_count); while ((index < mc_count) && mclist) { if (mclist->da_addrlen != ETH_ALEN) { rc = -EINVAL; goto mwl8k_cmd_mac_multicast_adr_exit; } memcpy(cmd->addr[index], mclist->da_addr, ETH_ALEN); index++; mclist = mclist->next; } rc = mwl8k_post_cmd(hw, &cmd->header); mwl8k_cmd_mac_multicast_adr_exit: kfree(cmd); return rc; } /* * CMD_802_11_GET_STAT. */ struct mwl8k_cmd_802_11_get_stat { struct mwl8k_cmd_pkt header; __le16 action; __le32 stats[64]; } __attribute__((packed)); #define MWL8K_STAT_ACK_FAILURE 9 #define MWL8K_STAT_RTS_FAILURE 12 #define MWL8K_STAT_FCS_ERROR 24 #define MWL8K_STAT_RTS_SUCCESS 11 static int mwl8k_cmd_802_11_get_stat(struct ieee80211_hw *hw, struct ieee80211_low_level_stats *stats) { struct mwl8k_cmd_802_11_get_stat *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le16(MWL8K_CMD_GET); rc = mwl8k_post_cmd(hw, &cmd->header); if (!rc) { stats->dot11ACKFailureCount = le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]); stats->dot11RTSFailureCount = le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]); stats->dot11FCSErrorCount = le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]); stats->dot11RTSSuccessCount = le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]); } kfree(cmd); return rc; } /* * CMD_802_11_RADIO_CONTROL. */ struct mwl8k_cmd_802_11_radio_control { struct mwl8k_cmd_pkt header; __le16 action; __le16 control; __le16 radio_on; } __attribute__((packed)); static int mwl8k_cmd_802_11_radio_control(struct ieee80211_hw *hw, int enable) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_cmd_802_11_radio_control *cmd; int rc; if (((enable & MWL8K_RADIO_ENABLE) == priv->radio_state) && !(enable & MWL8K_RADIO_FORCE)) return 0; enable &= MWL8K_RADIO_ENABLE; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le16(MWL8K_CMD_SET); cmd->control = cpu_to_le16(priv->radio_preamble); cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000); rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); if (!rc) priv->radio_state = enable; return rc; } static int mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble) { struct mwl8k_priv *priv; if (hw == NULL || hw->priv == NULL) return -EINVAL; priv = hw->priv; priv->radio_preamble = (short_preamble ? MWL8K_RADIO_SHORT_PREAMBLE : MWL8K_RADIO_LONG_PREAMBLE); return mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE | MWL8K_RADIO_FORCE); } /* * CMD_802_11_RF_TX_POWER. */ #define MWL8K_TX_POWER_LEVEL_TOTAL 8 struct mwl8k_cmd_802_11_rf_tx_power { struct mwl8k_cmd_pkt header; __le16 action; __le16 support_level; __le16 current_level; __le16 reserved; __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL]; } __attribute__((packed)); static int mwl8k_cmd_802_11_rf_tx_power(struct ieee80211_hw *hw, int dBm) { struct mwl8k_cmd_802_11_rf_tx_power *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le16(MWL8K_CMD_SET); cmd->support_level = cpu_to_le16(dBm); rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_SET_PRE_SCAN. */ struct mwl8k_cmd_set_pre_scan { struct mwl8k_cmd_pkt header; } __attribute__((packed)); static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw) { struct mwl8k_cmd_set_pre_scan *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN); cmd->header.length = cpu_to_le16(sizeof(*cmd)); rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_SET_POST_SCAN. */ struct mwl8k_cmd_set_post_scan { struct mwl8k_cmd_pkt header; __le32 isibss; __u8 bssid[ETH_ALEN]; } __attribute__((packed)); static int mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, __u8 mac[ETH_ALEN]) { struct mwl8k_cmd_set_post_scan *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->isibss = 0; memcpy(cmd->bssid, mac, ETH_ALEN); rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_SET_RF_CHANNEL. */ struct mwl8k_cmd_set_rf_channel { struct mwl8k_cmd_pkt header; __le16 action; __u8 current_channel; __le32 channel_flags; } __attribute__((packed)); static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw, struct ieee80211_channel *channel) { struct mwl8k_cmd_set_rf_channel *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le16(MWL8K_CMD_SET); cmd->current_channel = channel->hw_value; if (channel->band == IEEE80211_BAND_2GHZ) cmd->channel_flags = cpu_to_le32(0x00000081); else cmd->channel_flags = cpu_to_le32(0x00000000); rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_SET_SLOT. */ struct mwl8k_cmd_set_slot { struct mwl8k_cmd_pkt header; __le16 action; __u8 short_slot; } __attribute__((packed)); static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, int slot_time) { struct mwl8k_cmd_set_slot *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le16(MWL8K_CMD_SET); cmd->short_slot = slot_time == MWL8K_SHORT_SLOTTIME ? 1 : 0; rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_MIMO_CONFIG. */ struct mwl8k_cmd_mimo_config { struct mwl8k_cmd_pkt header; __le32 action; __u8 rx_antenna_map; __u8 tx_antenna_map; } __attribute__((packed)); static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx) { struct mwl8k_cmd_mimo_config *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET); cmd->rx_antenna_map = rx; cmd->tx_antenna_map = tx; rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_ENABLE_SNIFFER. */ struct mwl8k_cmd_enable_sniffer { struct mwl8k_cmd_pkt header; __le32 action; } __attribute__((packed)); static int mwl8k_enable_sniffer(struct ieee80211_hw *hw, bool enable) { struct mwl8k_cmd_enable_sniffer *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = enable ? cpu_to_le32((u32)MWL8K_CMD_SET) : 0; rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_SET_RATE_ADAPT_MODE. */ struct mwl8k_cmd_set_rate_adapt_mode { struct mwl8k_cmd_pkt header; __le16 action; __le16 mode; } __attribute__((packed)); static int mwl8k_cmd_setrateadaptmode(struct ieee80211_hw *hw, __u16 mode) { struct mwl8k_cmd_set_rate_adapt_mode *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le16(MWL8K_CMD_SET); cmd->mode = cpu_to_le16(mode); rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_SET_WMM_MODE. */ struct mwl8k_cmd_set_wmm { struct mwl8k_cmd_pkt header; __le16 action; } __attribute__((packed)); static int mwl8k_set_wmm(struct ieee80211_hw *hw, bool enable) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_cmd_set_wmm *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = enable ? cpu_to_le16(MWL8K_CMD_SET) : 0; rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); if (!rc) priv->wmm_mode = enable; return rc; } /* * CMD_SET_RTS_THRESHOLD. */ struct mwl8k_cmd_rts_threshold { struct mwl8k_cmd_pkt header; __le16 action; __le16 threshold; } __attribute__((packed)); static int mwl8k_rts_threshold(struct ieee80211_hw *hw, u16 action, u16 *threshold) { struct mwl8k_cmd_rts_threshold *cmd; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le16(action); cmd->threshold = cpu_to_le16(*threshold); rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_SET_EDCA_PARAMS. */ struct mwl8k_cmd_set_edca_params { struct mwl8k_cmd_pkt header; /* See MWL8K_SET_EDCA_XXX below */ __le16 action; /* TX opportunity in units of 32 us */ __le16 txop; /* Log exponent of max contention period: 0...15*/ __u8 log_cw_max; /* Log exponent of min contention period: 0...15 */ __u8 log_cw_min; /* Adaptive interframe spacing in units of 32us */ __u8 aifs; /* TX queue to configure */ __u8 txq; } __attribute__((packed)); #define MWL8K_SET_EDCA_CW 0x01 #define MWL8K_SET_EDCA_TXOP 0x02 #define MWL8K_SET_EDCA_AIFS 0x04 #define MWL8K_SET_EDCA_ALL (MWL8K_SET_EDCA_CW | \ MWL8K_SET_EDCA_TXOP | \ MWL8K_SET_EDCA_AIFS) static int mwl8k_set_edca_params(struct ieee80211_hw *hw, __u8 qnum, __u16 cw_min, __u16 cw_max, __u8 aifs, __u16 txop) { struct mwl8k_cmd_set_edca_params *cmd; u32 log_cw_min, log_cw_max; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; log_cw_min = ilog2(cw_min+1); log_cw_max = ilog2(cw_max+1); cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL); cmd->txop = cpu_to_le16(txop); cmd->log_cw_max = (u8)log_cw_max; cmd->log_cw_min = (u8)log_cw_min; cmd->aifs = aifs; cmd->txq = qnum; rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_FINALIZE_JOIN. */ /* FJ beacon buffer size is compiled into the firmware. */ #define MWL8K_FJ_BEACON_MAXLEN 128 struct mwl8k_cmd_finalize_join { struct mwl8k_cmd_pkt header; __le32 sleep_interval; /* Number of beacon periods to sleep */ __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN]; } __attribute__((packed)); static int mwl8k_finalize_join(struct ieee80211_hw *hw, void *frame, __u16 framelen, __u16 dtim) { struct mwl8k_cmd_finalize_join *cmd; struct ieee80211_mgmt *payload = frame; u16 hdrlen; u32 payload_len; int rc; if (frame == NULL) return -EINVAL; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN); cmd->header.length = cpu_to_le16(sizeof(*cmd)); if (dtim) cmd->sleep_interval = cpu_to_le32(dtim); else cmd->sleep_interval = cpu_to_le32(1); hdrlen = ieee80211_hdrlen(payload->frame_control); payload_len = framelen > hdrlen ? framelen - hdrlen : 0; /* XXX TBD Might just have to abort and return an error */ if (payload_len > MWL8K_FJ_BEACON_MAXLEN) printk(KERN_ERR "%s(): WARNING: Incomplete beacon " "sent to firmware. Sz=%u MAX=%u\n", __func__, payload_len, MWL8K_FJ_BEACON_MAXLEN); payload_len = payload_len > MWL8K_FJ_BEACON_MAXLEN ? MWL8K_FJ_BEACON_MAXLEN : payload_len; if (payload && payload_len) memcpy(cmd->beacon_data, &payload->u.beacon, payload_len); rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_UPDATE_STADB. */ struct mwl8k_cmd_update_sta_db { struct mwl8k_cmd_pkt header; /* See STADB_ACTION_TYPE */ __le32 action; /* Peer MAC address */ __u8 peer_addr[ETH_ALEN]; __le32 reserved; /* Peer info - valid during add/update. */ struct peer_capability_info peer_info; } __attribute__((packed)); static int mwl8k_cmd_update_sta_db(struct ieee80211_hw *hw, struct ieee80211_vif *vif, __u32 action) { struct mwl8k_vif *mv_vif = MWL8K_VIF(vif); struct ieee80211_bss_conf *info = &mv_vif->bss_info; struct mwl8k_cmd_update_sta_db *cmd; struct peer_capability_info *peer_info; struct ieee80211_rate *bitrates = mv_vif->legacy_rates; int rc; __u8 count, *rates; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le32(action); peer_info = &cmd->peer_info; memcpy(cmd->peer_addr, mv_vif->bssid, ETH_ALEN); switch (action) { case MWL8K_STA_DB_ADD_ENTRY: case MWL8K_STA_DB_MODIFY_ENTRY: /* Build peer_info block */ peer_info->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT; peer_info->basic_caps = cpu_to_le16(info->assoc_capability); peer_info->interop = 1; peer_info->amsdu_enabled = 0; rates = peer_info->legacy_rates; for (count = 0 ; count < mv_vif->legacy_nrates; count++) rates[count] = bitrates[count].hw_value; rc = mwl8k_post_cmd(hw, &cmd->header); if (rc == 0) mv_vif->peer_id = peer_info->station_id; break; case MWL8K_STA_DB_DEL_ENTRY: case MWL8K_STA_DB_FLUSH: default: rc = mwl8k_post_cmd(hw, &cmd->header); if (rc == 0) mv_vif->peer_id = 0; break; } kfree(cmd); return rc; } /* * CMD_SET_AID. */ #define MWL8K_RATE_INDEX_MAX_ARRAY 14 #define MWL8K_FRAME_PROT_DISABLED 0x00 #define MWL8K_FRAME_PROT_11G 0x07 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY 0x02 #define MWL8K_FRAME_PROT_11N_HT_ALL 0x06 struct mwl8k_cmd_update_set_aid { struct mwl8k_cmd_pkt header; __le16 aid; /* AP's MAC address (BSSID) */ __u8 bssid[ETH_ALEN]; __le16 protection_mode; __u8 supp_rates[MWL8K_RATE_INDEX_MAX_ARRAY]; } __attribute__((packed)); static int mwl8k_cmd_set_aid(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct mwl8k_vif *mv_vif = MWL8K_VIF(vif); struct ieee80211_bss_conf *info = &mv_vif->bss_info; struct mwl8k_cmd_update_set_aid *cmd; struct ieee80211_rate *bitrates = mv_vif->legacy_rates; int count; u16 prot_mode; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->aid = cpu_to_le16(info->aid); memcpy(cmd->bssid, mv_vif->bssid, ETH_ALEN); prot_mode = MWL8K_FRAME_PROT_DISABLED; if (info->use_cts_prot) { prot_mode = MWL8K_FRAME_PROT_11G; } else { switch (info->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) { case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY; break; case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL; break; default: prot_mode = MWL8K_FRAME_PROT_DISABLED; break; } } cmd->protection_mode = cpu_to_le16(prot_mode); for (count = 0; count < mv_vif->legacy_nrates; count++) cmd->supp_rates[count] = bitrates[count].hw_value; rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_SET_RATE. */ struct mwl8k_cmd_update_rateset { struct mwl8k_cmd_pkt header; __u8 legacy_rates[MWL8K_RATE_INDEX_MAX_ARRAY]; /* Bitmap for supported MCS codes. */ __u8 mcs_set[MWL8K_IEEE_LEGACY_DATA_RATES]; __u8 reserved[MWL8K_IEEE_LEGACY_DATA_RATES]; } __attribute__((packed)); static int mwl8k_update_rateset(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct mwl8k_vif *mv_vif = MWL8K_VIF(vif); struct mwl8k_cmd_update_rateset *cmd; struct ieee80211_rate *bitrates = mv_vif->legacy_rates; int count; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE); cmd->header.length = cpu_to_le16(sizeof(*cmd)); for (count = 0; count < mv_vif->legacy_nrates; count++) cmd->legacy_rates[count] = bitrates[count].hw_value; rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * CMD_USE_FIXED_RATE. */ #define MWL8K_RATE_TABLE_SIZE 8 #define MWL8K_UCAST_RATE 0 #define MWL8K_USE_AUTO_RATE 0x0002 struct mwl8k_rate_entry { /* Set to 1 if HT rate, 0 if legacy. */ __le32 is_ht_rate; /* Set to 1 to use retry_count field. */ __le32 enable_retry; /* Specified legacy rate or MCS. */ __le32 rate; /* Number of allowed retries. */ __le32 retry_count; } __attribute__((packed)); struct mwl8k_rate_table { /* 1 to allow specified rate and below */ __le32 allow_rate_drop; __le32 num_rates; struct mwl8k_rate_entry rate_entry[MWL8K_RATE_TABLE_SIZE]; } __attribute__((packed)); struct mwl8k_cmd_use_fixed_rate { struct mwl8k_cmd_pkt header; __le32 action; struct mwl8k_rate_table rate_table; /* Unicast, Broadcast or Multicast */ __le32 rate_type; __le32 reserved1; __le32 reserved2; } __attribute__((packed)); static int mwl8k_cmd_use_fixed_rate(struct ieee80211_hw *hw, u32 action, u32 rate_type, struct mwl8k_rate_table *rate_table) { struct mwl8k_cmd_use_fixed_rate *cmd; int count; int rc; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) return -ENOMEM; cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE); cmd->header.length = cpu_to_le16(sizeof(*cmd)); cmd->action = cpu_to_le32(action); cmd->rate_type = cpu_to_le32(rate_type); if (rate_table != NULL) { /* Copy over each field manually so * that bitflipping can be done */ cmd->rate_table.allow_rate_drop = cpu_to_le32(rate_table->allow_rate_drop); cmd->rate_table.num_rates = cpu_to_le32(rate_table->num_rates); for (count = 0; count < rate_table->num_rates; count++) { struct mwl8k_rate_entry *dst = &cmd->rate_table.rate_entry[count]; struct mwl8k_rate_entry *src = &rate_table->rate_entry[count]; dst->is_ht_rate = cpu_to_le32(src->is_ht_rate); dst->enable_retry = cpu_to_le32(src->enable_retry); dst->rate = cpu_to_le32(src->rate); dst->retry_count = cpu_to_le32(src->retry_count); } } rc = mwl8k_post_cmd(hw, &cmd->header); kfree(cmd); return rc; } /* * Interrupt handling. */ static irqreturn_t mwl8k_interrupt(int irq, void *dev_id) { struct ieee80211_hw *hw = dev_id; struct mwl8k_priv *priv = hw->priv; u32 status; status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); if (!status) return IRQ_NONE; if (status & MWL8K_A2H_INT_TX_DONE) tasklet_schedule(&priv->tx_reclaim_task); if (status & MWL8K_A2H_INT_RX_READY) { while (rxq_process(hw, 0, 1)) rxq_refill(hw, 0, 1); } if (status & MWL8K_A2H_INT_OPC_DONE) { if (priv->hostcmd_wait != NULL) { complete(priv->hostcmd_wait); priv->hostcmd_wait = NULL; } } if (status & MWL8K_A2H_INT_QUEUE_EMPTY) { if (!priv->inconfig && priv->radio_state && mwl8k_txq_busy(priv)) mwl8k_tx_start(priv); } return IRQ_HANDLED; } /* * Core driver operations. */ static int mwl8k_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { struct mwl8k_priv *priv = hw->priv; int index = skb_get_queue_mapping(skb); int rc; if (priv->current_channel == NULL) { printk(KERN_DEBUG "%s: dropped TX frame since radio " "disabled\n", priv->name); dev_kfree_skb(skb); return NETDEV_TX_OK; } rc = mwl8k_txq_xmit(hw, index, skb); return rc; } struct mwl8k_work_struct { /* Initialized by mwl8k_queue_work(). */ struct work_struct wt; /* Required field passed in to mwl8k_queue_work(). */ struct ieee80211_hw *hw; /* Required field passed in to mwl8k_queue_work(). */ int (*wfunc)(struct work_struct *w); /* Initialized by mwl8k_queue_work(). */ struct completion *cmd_wait; /* Result code. */ int rc; /* * Optional field. Refer to explanation of MWL8K_WQ_XXX_XXX * flags for explanation. Defaults to MWL8K_WQ_DEFAULT_OPTIONS. */ u32 options; /* Optional field. Defaults to MWL8K_CONFIG_TIMEOUT_MS. */ unsigned long timeout_ms; /* Optional field. Defaults to MWL8K_WQ_TXWAIT_ATTEMPTS. */ u32 txwait_attempts; /* Optional field. Defaults to MWL8K_TXWAIT_MS. */ u32 tx_timeout_ms; u32 step; }; /* Flags controlling behavior of config queue requests */ /* Caller spins while waiting for completion. */ #define MWL8K_WQ_SPIN 0x00000001 /* Wait for TX queues to empty before proceeding with configuration. */ #define MWL8K_WQ_TX_WAIT_EMPTY 0x00000002 /* Queue request and return immediately. */ #define MWL8K_WQ_POST_REQUEST 0x00000004 /* * Caller sleeps and waits for task complete notification. * Do not use in atomic context. */ #define MWL8K_WQ_SLEEP 0x00000008 /* Free work struct when task is done. */ #define MWL8K_WQ_FREE_WORKSTRUCT 0x00000010 /* * Config request is queued and returns to caller imediately. Use * this in atomic context. Work struct is freed by mwl8k_queue_work() * when this flag is set. */ #define MWL8K_WQ_QUEUE_ONLY (MWL8K_WQ_POST_REQUEST | \ MWL8K_WQ_FREE_WORKSTRUCT) /* Default work queue behavior is to sleep and wait for tx completion. */ #define MWL8K_WQ_DEFAULT_OPTIONS (MWL8K_WQ_SLEEP | MWL8K_WQ_TX_WAIT_EMPTY) /* * Default config request timeout. Add adjustments to make sure the * config thread waits long enough for both tx wait and cmd wait before * timing out. */ /* Time to wait for all TXQs to drain. TX Doorbell is pressed each time. */ #define MWL8K_TXWAIT_TIMEOUT_MS 1000 /* Default number of TX wait attempts. */ #define MWL8K_WQ_TXWAIT_ATTEMPTS 4 /* Total time to wait for TXQ to drain. */ #define MWL8K_TXWAIT_MS (MWL8K_TXWAIT_TIMEOUT_MS * \ MWL8K_WQ_TXWAIT_ATTEMPTS) /* Scheduling slop. */ #define MWL8K_OS_SCHEDULE_OVERHEAD_MS 200 #define MWL8K_CONFIG_TIMEOUT_MS (MWL8K_CMD_TIMEOUT_MS + \ MWL8K_TXWAIT_MS + \ MWL8K_OS_SCHEDULE_OVERHEAD_MS) static void mwl8k_config_thread(struct work_struct *wt) { struct mwl8k_work_struct *worker = (struct mwl8k_work_struct *)wt; struct ieee80211_hw *hw = worker->hw; struct mwl8k_priv *priv = hw->priv; int rc = 0; spin_lock_irq(&priv->tx_lock); priv->inconfig = true; spin_unlock_irq(&priv->tx_lock); ieee80211_stop_queues(hw); /* * Wait for host queues to drain before doing PHY * reconfiguration. This avoids interrupting any in-flight * DMA transfers to the hardware. */ if (worker->options & MWL8K_WQ_TX_WAIT_EMPTY) { u32 timeout; u32 time_remaining; u32 iter; u32 tx_wait_attempts = worker->txwait_attempts; time_remaining = worker->tx_timeout_ms; if (!tx_wait_attempts) tx_wait_attempts = 1; timeout = worker->tx_timeout_ms/tx_wait_attempts; if (!timeout) timeout = 1; iter = tx_wait_attempts; do { int wait_time; if (time_remaining > timeout) { time_remaining -= timeout; wait_time = timeout; } else wait_time = time_remaining; if (!wait_time) wait_time = 1; rc = mwl8k_tx_wait_empty(hw, wait_time); if (rc) printk(KERN_ERR "%s() txwait timeout=%ums " "Retry:%u/%u\n", __func__, timeout, tx_wait_attempts - iter + 1, tx_wait_attempts); } while (rc && --iter); rc = iter ? 0 : -ETIMEDOUT; } if (!rc) rc = worker->wfunc(wt); spin_lock_irq(&priv->tx_lock); priv->inconfig = false; if (priv->pending_tx_pkts && priv->radio_state) mwl8k_tx_start(priv); spin_unlock_irq(&priv->tx_lock); ieee80211_wake_queues(hw); worker->rc = rc; if (worker->options & MWL8K_WQ_SLEEP) complete(worker->cmd_wait); if (worker->options & MWL8K_WQ_FREE_WORKSTRUCT) kfree(wt); } static int mwl8k_queue_work(struct ieee80211_hw *hw, struct mwl8k_work_struct *worker, struct workqueue_struct *wqueue, int (*wfunc)(struct work_struct *w)) { unsigned long timeout = 0; int rc = 0; DECLARE_COMPLETION_ONSTACK(cmd_wait); if (!worker->timeout_ms) worker->timeout_ms = MWL8K_CONFIG_TIMEOUT_MS; if (!worker->options) worker->options = MWL8K_WQ_DEFAULT_OPTIONS; if (!worker->txwait_attempts) worker->txwait_attempts = MWL8K_WQ_TXWAIT_ATTEMPTS; if (!worker->tx_timeout_ms) worker->tx_timeout_ms = MWL8K_TXWAIT_MS; worker->hw = hw; worker->cmd_wait = &cmd_wait; worker->rc = 1; worker->wfunc = wfunc; INIT_WORK(&worker->wt, mwl8k_config_thread); queue_work(wqueue, &worker->wt); if (worker->options & MWL8K_WQ_POST_REQUEST) { rc = 0; } else { if (worker->options & MWL8K_WQ_SPIN) { timeout = worker->timeout_ms; while (timeout && (worker->rc > 0)) { mdelay(1); timeout--; } } else if (worker->options & MWL8K_WQ_SLEEP) timeout = wait_for_completion_timeout(&cmd_wait, msecs_to_jiffies(worker->timeout_ms)); if (timeout) rc = worker->rc; else { cancel_work_sync(&worker->wt); rc = -ETIMEDOUT; } } return rc; } struct mwl8k_start_worker { struct mwl8k_work_struct header; }; static int mwl8k_start_wt(struct work_struct *wt) { struct mwl8k_start_worker *worker = (struct mwl8k_start_worker *)wt; struct ieee80211_hw *hw = worker->header.hw; struct mwl8k_priv *priv = hw->priv; int rc = 0; if (priv->vif != NULL) { rc = -EIO; goto mwl8k_start_exit; } /* Turn on radio */ if (mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE)) { rc = -EIO; goto mwl8k_start_exit; } /* Purge TX/RX HW queues */ if (mwl8k_cmd_set_pre_scan(hw)) { rc = -EIO; goto mwl8k_start_exit; } if (mwl8k_cmd_set_post_scan(hw, "\x00\x00\x00\x00\x00\x00")) { rc = -EIO; goto mwl8k_start_exit; } /* Enable firmware rate adaptation */ if (mwl8k_cmd_setrateadaptmode(hw, 0)) { rc = -EIO; goto mwl8k_start_exit; } /* Disable WMM. WMM gets enabled when stack sends WMM parms */ if (mwl8k_set_wmm(hw, MWL8K_WMM_DISABLE)) { rc = -EIO; goto mwl8k_start_exit; } /* Disable sniffer mode */ if (mwl8k_enable_sniffer(hw, 0)) rc = -EIO; mwl8k_start_exit: return rc; } static int mwl8k_start(struct ieee80211_hw *hw) { struct mwl8k_start_worker *worker; struct mwl8k_priv *priv = hw->priv; int rc; /* Enable tx reclaim tasklet */ tasklet_enable(&priv->tx_reclaim_task); rc = request_irq(priv->pdev->irq, &mwl8k_interrupt, IRQF_SHARED, MWL8K_NAME, hw); if (rc) { printk(KERN_ERR "%s: failed to register IRQ handler\n", priv->name); rc = -EIO; goto mwl8k_start_disable_tasklet; } /* Enable interrupts */ iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); worker = kzalloc(sizeof(*worker), GFP_KERNEL); if (worker == NULL) { rc = -ENOMEM; goto mwl8k_start_disable_irq; } rc = mwl8k_queue_work(hw, &worker->header, priv->config_wq, mwl8k_start_wt); kfree(worker); if (!rc) return rc; if (rc == -ETIMEDOUT) printk(KERN_ERR "%s() timed out\n", __func__); rc = -EIO; mwl8k_start_disable_irq: spin_lock_irq(&priv->tx_lock); iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); spin_unlock_irq(&priv->tx_lock); free_irq(priv->pdev->irq, hw); mwl8k_start_disable_tasklet: tasklet_disable(&priv->tx_reclaim_task); return rc; } struct mwl8k_stop_worker { struct mwl8k_work_struct header; }; static int mwl8k_stop_wt(struct work_struct *wt) { struct mwl8k_stop_worker *worker = (struct mwl8k_stop_worker *)wt; struct ieee80211_hw *hw = worker->header.hw; int rc; rc = mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE); return rc; } static void mwl8k_stop(struct ieee80211_hw *hw) { int rc; struct mwl8k_stop_worker *worker; struct mwl8k_priv *priv = hw->priv; int i; if (priv->vif != NULL) return; ieee80211_stop_queues(hw); worker = kzalloc(sizeof(*worker), GFP_KERNEL); if (worker == NULL) return; rc = mwl8k_queue_work(hw, &worker->header, priv->config_wq, mwl8k_stop_wt); kfree(worker); if (rc == -ETIMEDOUT) printk(KERN_ERR "%s() timed out\n", __func__); /* Disable interrupts */ spin_lock_irq(&priv->tx_lock); iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); spin_unlock_irq(&priv->tx_lock); free_irq(priv->pdev->irq, hw); /* Stop finalize join worker */ cancel_work_sync(&priv->finalize_join_worker); if (priv->beacon_skb != NULL) dev_kfree_skb(priv->beacon_skb); /* Stop tx reclaim tasklet */ tasklet_disable(&priv->tx_reclaim_task); /* Stop config thread */ flush_workqueue(priv->config_wq); /* Return all skbs to mac80211 */ for (i = 0; i < MWL8K_TX_QUEUES; i++) mwl8k_txq_reclaim(hw, i, 1); } static int mwl8k_add_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_vif *mwl8k_vif; /* * We only support one active interface at a time. */ if (priv->vif != NULL) return -EBUSY; /* * We only support managed interfaces for now. */ if (conf->type != NL80211_IFTYPE_STATION && conf->type != NL80211_IFTYPE_MONITOR) return -EINVAL; /* Clean out driver private area */ mwl8k_vif = MWL8K_VIF(conf->vif); memset(mwl8k_vif, 0, sizeof(*mwl8k_vif)); /* Save the mac address */ memcpy(mwl8k_vif->mac_addr, conf->mac_addr, ETH_ALEN); /* Back pointer to parent config block */ mwl8k_vif->priv = priv; /* Setup initial PHY parameters */ memcpy(mwl8k_vif->legacy_rates , priv->rates, sizeof(mwl8k_vif->legacy_rates)); mwl8k_vif->legacy_nrates = ARRAY_SIZE(priv->rates); /* Set Initial sequence number to zero */ mwl8k_vif->seqno = 0; priv->vif = conf->vif; priv->current_channel = NULL; return 0; } static void mwl8k_remove_interface(struct ieee80211_hw *hw, struct ieee80211_if_init_conf *conf) { struct mwl8k_priv *priv = hw->priv; if (priv->vif == NULL) return; priv->vif = NULL; } struct mwl8k_config_worker { struct mwl8k_work_struct header; u32 changed; }; static int mwl8k_config_wt(struct work_struct *wt) { struct mwl8k_config_worker *worker = (struct mwl8k_config_worker *)wt; struct ieee80211_hw *hw = worker->header.hw; struct ieee80211_conf *conf = &hw->conf; struct mwl8k_priv *priv = hw->priv; int rc = 0; if (mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE)) { rc = -EINVAL; goto mwl8k_config_exit; } priv->current_channel = conf->channel; if (mwl8k_cmd_set_rf_channel(hw, conf->channel)) { rc = -EINVAL; goto mwl8k_config_exit; } if (conf->power_level > 18) conf->power_level = 18; if (mwl8k_cmd_802_11_rf_tx_power(hw, conf->power_level)) { rc = -EINVAL; goto mwl8k_config_exit; } if (mwl8k_cmd_mimo_config(hw, 0x7, 0x7)) rc = -EINVAL; mwl8k_config_exit: return rc; } static int mwl8k_config(struct ieee80211_hw *hw, u32 changed) { int rc = 0; struct mwl8k_config_worker *worker; struct mwl8k_priv *priv = hw->priv; worker = kzalloc(sizeof(*worker), GFP_KERNEL); if (worker == NULL) return -ENOMEM; worker->changed = changed; rc = mwl8k_queue_work(hw, &worker->header, priv->config_wq, mwl8k_config_wt); if (rc == -ETIMEDOUT) { printk(KERN_ERR "%s() timed out.\n", __func__); rc = -EINVAL; } kfree(worker); /* * mac80211 will crash on anything other than -EINVAL on * error. Looks like wireless extensions which calls mac80211 * may be the actual culprit... */ return rc ? -EINVAL : 0; } struct mwl8k_bss_info_changed_worker { struct mwl8k_work_struct header; struct ieee80211_vif *vif; struct ieee80211_bss_conf *info; u32 changed; }; static int mwl8k_bss_info_changed_wt(struct work_struct *wt) { struct mwl8k_bss_info_changed_worker *worker = (struct mwl8k_bss_info_changed_worker *)wt; struct ieee80211_hw *hw = worker->header.hw; struct ieee80211_vif *vif = worker->vif; struct ieee80211_bss_conf *info = worker->info; u32 changed; int rc; struct mwl8k_priv *priv = hw->priv; struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif); changed = worker->changed; priv->capture_beacon = false; if (info->assoc) { memcpy(&mwl8k_vif->bss_info, info, sizeof(struct ieee80211_bss_conf)); /* Install rates */ if (mwl8k_update_rateset(hw, vif)) goto mwl8k_bss_info_changed_exit; /* Turn on rate adaptation */ if (mwl8k_cmd_use_fixed_rate(hw, MWL8K_USE_AUTO_RATE, MWL8K_UCAST_RATE, NULL)) goto mwl8k_bss_info_changed_exit; /* Set radio preamble */ if (mwl8k_set_radio_preamble(hw, info->use_short_preamble)) goto mwl8k_bss_info_changed_exit; /* Set slot time */ if (mwl8k_cmd_set_slot(hw, info->use_short_slot ? MWL8K_SHORT_SLOTTIME : MWL8K_LONG_SLOTTIME)) goto mwl8k_bss_info_changed_exit; /* Update peer rate info */ if (mwl8k_cmd_update_sta_db(hw, vif, MWL8K_STA_DB_MODIFY_ENTRY)) goto mwl8k_bss_info_changed_exit; /* Set AID */ if (mwl8k_cmd_set_aid(hw, vif)) goto mwl8k_bss_info_changed_exit; /* * Finalize the join. Tell rx handler to process * next beacon from our BSSID. */ memcpy(priv->capture_bssid, mwl8k_vif->bssid, ETH_ALEN); priv->capture_beacon = true; } else { mwl8k_cmd_update_sta_db(hw, vif, MWL8K_STA_DB_DEL_ENTRY); memset(&mwl8k_vif->bss_info, 0, sizeof(struct ieee80211_bss_conf)); memset(mwl8k_vif->bssid, 0, ETH_ALEN); } mwl8k_bss_info_changed_exit: rc = 0; return rc; } static void mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *info, u32 changed) { struct mwl8k_bss_info_changed_worker *worker; struct mwl8k_priv *priv = hw->priv; struct mwl8k_vif *mv_vif = MWL8K_VIF(vif); int rc; if (changed & BSS_CHANGED_BSSID) memcpy(mv_vif->bssid, info->bssid, ETH_ALEN); if ((changed & BSS_CHANGED_ASSOC) == 0) return; worker = kzalloc(sizeof(*worker), GFP_KERNEL); if (worker == NULL) return; worker->vif = vif; worker->info = info; worker->changed = changed; rc = mwl8k_queue_work(hw, &worker->header, priv->config_wq, mwl8k_bss_info_changed_wt); kfree(worker); if (rc == -ETIMEDOUT) printk(KERN_ERR "%s() timed out\n", __func__); } struct mwl8k_configure_filter_worker { struct mwl8k_work_struct header; unsigned int changed_flags; unsigned int *total_flags; int mc_count; struct dev_addr_list *mclist; }; #define MWL8K_SUPPORTED_IF_FLAGS FIF_BCN_PRBRESP_PROMISC static int mwl8k_configure_filter_wt(struct work_struct *wt) { struct mwl8k_configure_filter_worker *worker = (struct mwl8k_configure_filter_worker *)wt; struct ieee80211_hw *hw = worker->header.hw; unsigned int changed_flags = worker->changed_flags; unsigned int *total_flags = worker->total_flags; int mc_count = worker->mc_count; struct dev_addr_list *mclist = worker->mclist; struct mwl8k_priv *priv = hw->priv; int rc = 0; if (changed_flags & FIF_BCN_PRBRESP_PROMISC) { if (*total_flags & FIF_BCN_PRBRESP_PROMISC) rc = mwl8k_cmd_set_pre_scan(hw); else { u8 *bssid; bssid = "\x00\x00\x00\x00\x00\x00"; if (priv->vif != NULL) bssid = MWL8K_VIF(priv->vif)->bssid; rc = mwl8k_cmd_set_post_scan(hw, bssid); } } if (rc) goto mwl8k_configure_filter_exit; if (mc_count) { mc_count = mc_count < priv->num_mcaddrs ? mc_count : priv->num_mcaddrs; rc = mwl8k_cmd_mac_multicast_adr(hw, mc_count, mclist); if (rc) printk(KERN_ERR "%s()Error setting multicast addresses\n", __func__); } mwl8k_configure_filter_exit: return rc; } static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw, int mc_count, struct dev_addr_list *mclist) { struct mwl8k_configure_filter_worker *worker; worker = kzalloc(sizeof(*worker), GFP_ATOMIC); if (!worker) return 0; /* * XXX: This is _HORRIBLY_ broken!! * * No locking, the mclist pointer might be invalid as soon as this * function returns, something in the list might be invalidated * once we get to the worker, etc... */ worker->mc_count = mc_count; worker->mclist = mclist; return (u64)worker; } static void mwl8k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, u64 multicast) { struct mwl8k_configure_filter_worker *worker = (void *)multicast; struct mwl8k_priv *priv = hw->priv; /* Clear unsupported feature flags */ *total_flags &= MWL8K_SUPPORTED_IF_FLAGS; if (!(changed_flags & MWL8K_SUPPORTED_IF_FLAGS)) return; if (worker == NULL) return; worker->header.options = MWL8K_WQ_QUEUE_ONLY | MWL8K_WQ_TX_WAIT_EMPTY; worker->changed_flags = changed_flags; worker->total_flags = total_flags; mwl8k_queue_work(hw, &worker->header, priv->config_wq, mwl8k_configure_filter_wt); } struct mwl8k_set_rts_threshold_worker { struct mwl8k_work_struct header; u32 value; }; static int mwl8k_set_rts_threshold_wt(struct work_struct *wt) { struct mwl8k_set_rts_threshold_worker *worker = (struct mwl8k_set_rts_threshold_worker *)wt; struct ieee80211_hw *hw = worker->header.hw; u16 threshold = (u16)(worker->value); int rc; rc = mwl8k_rts_threshold(hw, MWL8K_CMD_SET, &threshold); return rc; } static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value) { int rc; struct mwl8k_set_rts_threshold_worker *worker; struct mwl8k_priv *priv = hw->priv; worker = kzalloc(sizeof(*worker), GFP_KERNEL); if (worker == NULL) return -ENOMEM; worker->value = value; rc = mwl8k_queue_work(hw, &worker->header, priv->config_wq, mwl8k_set_rts_threshold_wt); kfree(worker); if (rc == -ETIMEDOUT) { printk(KERN_ERR "%s() timed out\n", __func__); rc = -EINVAL; } return rc; } struct mwl8k_conf_tx_worker { struct mwl8k_work_struct header; u16 queue; const struct ieee80211_tx_queue_params *params; }; static int mwl8k_conf_tx_wt(struct work_struct *wt) { struct mwl8k_conf_tx_worker *worker = (struct mwl8k_conf_tx_worker *)wt; struct ieee80211_hw *hw = worker->header.hw; u16 queue = worker->queue; const struct ieee80211_tx_queue_params *params = worker->params; struct mwl8k_priv *priv = hw->priv; int rc = 0; if (priv->wmm_mode == MWL8K_WMM_DISABLE) if (mwl8k_set_wmm(hw, MWL8K_WMM_ENABLE)) { rc = -EINVAL; goto mwl8k_conf_tx_exit; } if (mwl8k_set_edca_params(hw, GET_TXQ(queue), params->cw_min, params->cw_max, params->aifs, params->txop)) rc = -EINVAL; mwl8k_conf_tx_exit: return rc; } static int mwl8k_conf_tx(struct ieee80211_hw *hw, u16 queue, const struct ieee80211_tx_queue_params *params) { int rc; struct mwl8k_conf_tx_worker *worker; struct mwl8k_priv *priv = hw->priv; worker = kzalloc(sizeof(*worker), GFP_KERNEL); if (worker == NULL) return -ENOMEM; worker->queue = queue; worker->params = params; rc = mwl8k_queue_work(hw, &worker->header, priv->config_wq, mwl8k_conf_tx_wt); kfree(worker); if (rc == -ETIMEDOUT) { printk(KERN_ERR "%s() timed out\n", __func__); rc = -EINVAL; } return rc; } static int mwl8k_get_tx_stats(struct ieee80211_hw *hw, struct ieee80211_tx_queue_stats *stats) { struct mwl8k_priv *priv = hw->priv; struct mwl8k_tx_queue *txq; int index; spin_lock_bh(&priv->tx_lock); for (index = 0; index < MWL8K_TX_QUEUES; index++) { txq = priv->txq + index; memcpy(&stats[index], &txq->tx_stats, sizeof(struct ieee80211_tx_queue_stats)); } spin_unlock_bh(&priv->tx_lock); return 0; } struct mwl8k_get_stats_worker { struct mwl8k_work_struct header; struct ieee80211_low_level_stats *stats; }; static int mwl8k_get_stats_wt(struct work_struct *wt) { struct mwl8k_get_stats_worker *worker = (struct mwl8k_get_stats_worker *)wt; return mwl8k_cmd_802_11_get_stat(worker->header.hw, worker->stats); } static int mwl8k_get_stats(struct ieee80211_hw *hw, struct ieee80211_low_level_stats *stats) { int rc; struct mwl8k_get_stats_worker *worker; struct mwl8k_priv *priv = hw->priv; worker = kzalloc(sizeof(*worker), GFP_KERNEL); if (worker == NULL) return -ENOMEM; worker->stats = stats; rc = mwl8k_queue_work(hw, &worker->header, priv->config_wq, mwl8k_get_stats_wt); kfree(worker); if (rc == -ETIMEDOUT) { printk(KERN_ERR "%s() timed out\n", __func__); rc = -EINVAL; } return rc; } static const struct ieee80211_ops mwl8k_ops = { .tx = mwl8k_tx, .start = mwl8k_start, .stop = mwl8k_stop, .add_interface = mwl8k_add_interface, .remove_interface = mwl8k_remove_interface, .config = mwl8k_config, .bss_info_changed = mwl8k_bss_info_changed, .prepare_multicast = mwl8k_prepare_multicast, .configure_filter = mwl8k_configure_filter, .set_rts_threshold = mwl8k_set_rts_threshold, .conf_tx = mwl8k_conf_tx, .get_tx_stats = mwl8k_get_tx_stats, .get_stats = mwl8k_get_stats, }; static void mwl8k_tx_reclaim_handler(unsigned long data) { int i; struct ieee80211_hw *hw = (struct ieee80211_hw *) data; struct mwl8k_priv *priv = hw->priv; spin_lock_bh(&priv->tx_lock); for (i = 0; i < MWL8K_TX_QUEUES; i++) mwl8k_txq_reclaim(hw, i, 0); if (priv->tx_wait != NULL) { int count = mwl8k_txq_busy(priv); if (count == 0) { complete(priv->tx_wait); priv->tx_wait = NULL; } } spin_unlock_bh(&priv->tx_lock); } static void mwl8k_finalize_join_worker(struct work_struct *work) { struct mwl8k_priv *priv = container_of(work, struct mwl8k_priv, finalize_join_worker); struct sk_buff *skb = priv->beacon_skb; u8 dtim = (MWL8K_VIF(priv->vif))->bss_info.dtim_period; mwl8k_finalize_join(priv->hw, skb->data, skb->len, dtim); dev_kfree_skb(skb); priv->beacon_skb = NULL; } static int __devinit mwl8k_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct ieee80211_hw *hw; struct mwl8k_priv *priv; int rc; int i; u8 *fw; rc = pci_enable_device(pdev); if (rc) { printk(KERN_ERR "%s: Cannot enable new PCI device\n", MWL8K_NAME); return rc; } rc = pci_request_regions(pdev, MWL8K_NAME); if (rc) { printk(KERN_ERR "%s: Cannot obtain PCI resources\n", MWL8K_NAME); return rc; } pci_set_master(pdev); hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops); if (hw == NULL) { printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME); rc = -ENOMEM; goto err_free_reg; } priv = hw->priv; priv->hw = hw; priv->pdev = pdev; priv->hostcmd_wait = NULL; priv->tx_wait = NULL; priv->inconfig = false; priv->wmm_mode = false; priv->pending_tx_pkts = 0; strncpy(priv->name, MWL8K_NAME, sizeof(priv->name)); spin_lock_init(&priv->fw_lock); SET_IEEE80211_DEV(hw, &pdev->dev); pci_set_drvdata(pdev, hw); priv->regs = pci_iomap(pdev, 1, 0x10000); if (priv->regs == NULL) { printk(KERN_ERR "%s: Cannot map device memory\n", priv->name); goto err_iounmap; } memcpy(priv->channels, mwl8k_channels, sizeof(mwl8k_channels)); priv->band.band = IEEE80211_BAND_2GHZ; priv->band.channels = priv->channels; priv->band.n_channels = ARRAY_SIZE(mwl8k_channels); priv->band.bitrates = priv->rates; priv->band.n_bitrates = ARRAY_SIZE(mwl8k_rates); hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band; BUILD_BUG_ON(sizeof(priv->rates) != sizeof(mwl8k_rates)); memcpy(priv->rates, mwl8k_rates, sizeof(mwl8k_rates)); /* * Extra headroom is the size of the required DMA header * minus the size of the smallest 802.11 frame (CTS frame). */ hw->extra_tx_headroom = sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts); hw->channel_change_time = 10; hw->queues = MWL8K_TX_QUEUES; hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_MONITOR); /* Set rssi and noise values to dBm */ hw->flags |= (IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM); hw->vif_data_size = sizeof(struct mwl8k_vif); priv->vif = NULL; /* Set default radio state and preamble */ priv->radio_preamble = MWL8K_RADIO_DEFAULT_PREAMBLE; priv->radio_state = MWL8K_RADIO_DISABLE; /* Finalize join worker */ INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker); /* TX reclaim tasklet */ tasklet_init(&priv->tx_reclaim_task, mwl8k_tx_reclaim_handler, (unsigned long)hw); tasklet_disable(&priv->tx_reclaim_task); /* Config workthread */ priv->config_wq = create_singlethread_workqueue("mwl8k_config"); if (priv->config_wq == NULL) goto err_iounmap; /* Power management cookie */ priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma); if (priv->cookie == NULL) goto err_iounmap; rc = mwl8k_rxq_init(hw, 0); if (rc) goto err_iounmap; rxq_refill(hw, 0, INT_MAX); spin_lock_init(&priv->tx_lock); for (i = 0; i < MWL8K_TX_QUEUES; i++) { rc = mwl8k_txq_init(hw, i); if (rc) goto err_free_queues; } iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS); iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL); iowrite32(0xffffffff, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK); rc = request_irq(priv->pdev->irq, &mwl8k_interrupt, IRQF_SHARED, MWL8K_NAME, hw); if (rc) { printk(KERN_ERR "%s: failed to register IRQ handler\n", priv->name); goto err_free_queues; } /* Reset firmware and hardware */ mwl8k_hw_reset(priv); /* Ask userland hotplug daemon for the device firmware */ rc = mwl8k_request_firmware(priv, (u32)id->driver_data); if (rc) { printk(KERN_ERR "%s: Firmware files not found\n", priv->name); goto err_free_irq; } /* Load firmware into hardware */ rc = mwl8k_load_firmware(priv); if (rc) { printk(KERN_ERR "%s: Cannot start firmware\n", priv->name); goto err_stop_firmware; } /* Reclaim memory once firmware is successfully loaded */ mwl8k_release_firmware(priv); /* * Temporarily enable interrupts. Initial firmware host * commands use interrupts and avoids polling. Disable * interrupts when done. */ iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); /* Get config data, mac addrs etc */ rc = mwl8k_cmd_get_hw_spec(hw); if (rc) { printk(KERN_ERR "%s: Cannot initialise firmware\n", priv->name); goto err_stop_firmware; } /* Turn radio off */ rc = mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE); if (rc) { printk(KERN_ERR "%s: Cannot disable\n", priv->name); goto err_stop_firmware; } /* Disable interrupts */ spin_lock_irq(&priv->tx_lock); iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); spin_unlock_irq(&priv->tx_lock); free_irq(priv->pdev->irq, hw); rc = ieee80211_register_hw(hw); if (rc) { printk(KERN_ERR "%s: Cannot register device\n", priv->name); goto err_stop_firmware; } fw = (u8 *)&priv->fw_rev; printk(KERN_INFO "%s: 88W%u %s\n", priv->name, priv->part_num, MWL8K_DESC); printk(KERN_INFO "%s: Driver Ver:%s Firmware Ver:%u.%u.%u.%u\n", priv->name, MWL8K_VERSION, fw[3], fw[2], fw[1], fw[0]); printk(KERN_INFO "%s: MAC Address: %pM\n", priv->name, hw->wiphy->perm_addr); return 0; err_stop_firmware: mwl8k_hw_reset(priv); mwl8k_release_firmware(priv); err_free_irq: spin_lock_irq(&priv->tx_lock); iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK); spin_unlock_irq(&priv->tx_lock); free_irq(priv->pdev->irq, hw); err_free_queues: for (i = 0; i < MWL8K_TX_QUEUES; i++) mwl8k_txq_deinit(hw, i); mwl8k_rxq_deinit(hw, 0); err_iounmap: if (priv->cookie != NULL) pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma); if (priv->regs != NULL) pci_iounmap(pdev, priv->regs); if (priv->config_wq != NULL) destroy_workqueue(priv->config_wq); pci_set_drvdata(pdev, NULL); ieee80211_free_hw(hw); err_free_reg: pci_release_regions(pdev); pci_disable_device(pdev); return rc; } static void __devexit mwl8k_shutdown(struct pci_dev *pdev) { printk(KERN_ERR "===>%s(%u)\n", __func__, __LINE__); } static void __devexit mwl8k_remove(struct pci_dev *pdev) { struct ieee80211_hw *hw = pci_get_drvdata(pdev); struct mwl8k_priv *priv; int i; if (hw == NULL) return; priv = hw->priv; ieee80211_stop_queues(hw); ieee80211_unregister_hw(hw); /* Remove tx reclaim tasklet */ tasklet_kill(&priv->tx_reclaim_task); /* Stop config thread */ destroy_workqueue(priv->config_wq); /* Stop hardware */ mwl8k_hw_reset(priv); /* Return all skbs to mac80211 */ for (i = 0; i < MWL8K_TX_QUEUES; i++) mwl8k_txq_reclaim(hw, i, 1); for (i = 0; i < MWL8K_TX_QUEUES; i++) mwl8k_txq_deinit(hw, i); mwl8k_rxq_deinit(hw, 0); pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma); pci_iounmap(pdev, priv->regs); pci_set_drvdata(pdev, NULL); ieee80211_free_hw(hw); pci_release_regions(pdev); pci_disable_device(pdev); } static struct pci_driver mwl8k_driver = { .name = MWL8K_NAME, .id_table = mwl8k_table, .probe = mwl8k_probe, .remove = __devexit_p(mwl8k_remove), .shutdown = __devexit_p(mwl8k_shutdown), }; static int __init mwl8k_init(void) { return pci_register_driver(&mwl8k_driver); } static void __exit mwl8k_exit(void) { pci_unregister_driver(&mwl8k_driver); } module_init(mwl8k_init); module_exit(mwl8k_exit);