Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1 | /** |
| 2 | * This file contains the handling of TX in wlan driver. |
| 3 | */ |
| 4 | #include <linux/netdevice.h> |
| 5 | |
| 6 | #include "hostcmd.h" |
| 7 | #include "radiotap.h" |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 8 | #include "decl.h" |
| 9 | #include "defs.h" |
| 10 | #include "dev.h" |
| 11 | #include "wext.h" |
| 12 | |
| 13 | /** |
| 14 | * @brief This function converts Tx/Rx rates from IEEE80211_RADIOTAP_RATE |
| 15 | * units (500 Kb/s) into Marvell WLAN format (see Table 8 in Section 3.2.1) |
| 16 | * |
| 17 | * @param rate Input rate |
| 18 | * @return Output Rate (0 if invalid) |
| 19 | */ |
| 20 | static u32 convert_radiotap_rate_to_mv(u8 rate) |
| 21 | { |
| 22 | switch (rate) { |
| 23 | case 2: /* 1 Mbps */ |
| 24 | return 0 | (1 << 4); |
| 25 | case 4: /* 2 Mbps */ |
| 26 | return 1 | (1 << 4); |
| 27 | case 11: /* 5.5 Mbps */ |
| 28 | return 2 | (1 << 4); |
| 29 | case 22: /* 11 Mbps */ |
| 30 | return 3 | (1 << 4); |
| 31 | case 12: /* 6 Mbps */ |
| 32 | return 4 | (1 << 4); |
| 33 | case 18: /* 9 Mbps */ |
| 34 | return 5 | (1 << 4); |
| 35 | case 24: /* 12 Mbps */ |
| 36 | return 6 | (1 << 4); |
| 37 | case 36: /* 18 Mbps */ |
| 38 | return 7 | (1 << 4); |
| 39 | case 48: /* 24 Mbps */ |
| 40 | return 8 | (1 << 4); |
| 41 | case 72: /* 36 Mbps */ |
| 42 | return 9 | (1 << 4); |
| 43 | case 96: /* 48 Mbps */ |
| 44 | return 10 | (1 << 4); |
| 45 | case 108: /* 54 Mbps */ |
| 46 | return 11 | (1 << 4); |
| 47 | } |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | /** |
David Woodhouse | 6b4a7e0 | 2007-12-09 12:48:10 -0500 | [diff] [blame] | 52 | * @brief This function checks the conditions and sends packet to IF |
| 53 | * layer if everything is ok. |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 54 | * |
Holger Schurig | 69f9032 | 2007-11-23 15:43:44 +0100 | [diff] [blame] | 55 | * @param priv A pointer to struct lbs_private structure |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 56 | * @param skb A pointer to skb which includes TX packet |
| 57 | * @return 0 or -1 |
| 58 | */ |
David Woodhouse | 8af23b2 | 2007-12-09 12:57:14 -0500 | [diff] [blame] | 59 | int lbs_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 60 | { |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 61 | unsigned long flags; |
David Woodhouse | 8af23b2 | 2007-12-09 12:57:14 -0500 | [diff] [blame] | 62 | struct lbs_private *priv = dev->priv; |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 63 | struct txpd *txpd; |
| 64 | char *p802x_hdr; |
| 65 | uint16_t pkt_len; |
| 66 | int ret; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 67 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 68 | lbs_deb_enter(LBS_DEB_TX); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 69 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 70 | ret = NETDEV_TX_OK; |
David Woodhouse | 8af23b2 | 2007-12-09 12:57:14 -0500 | [diff] [blame] | 71 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 72 | /* We need to protect against the queues being restarted before |
| 73 | we get round to stopping them */ |
| 74 | spin_lock_irqsave(&priv->driver_lock, flags); |
David Woodhouse | 6b4a7e0 | 2007-12-09 12:48:10 -0500 | [diff] [blame] | 75 | |
David Woodhouse | aa21c00 | 2007-12-08 20:04:36 +0000 | [diff] [blame] | 76 | if (priv->surpriseremoved) |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 77 | goto free; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 78 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 79 | if (!skb->len || (skb->len > MRVDRV_ETH_TX_PACKET_BUFFER_SIZE)) { |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 80 | lbs_deb_tx("tx err: skb length %d 0 or > %zd\n", |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 81 | skb->len, MRVDRV_ETH_TX_PACKET_BUFFER_SIZE); |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 82 | /* We'll never manage to send this one; drop it and return 'OK' */ |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 83 | |
| 84 | priv->stats.tx_dropped++; |
| 85 | priv->stats.tx_errors++; |
| 86 | goto free; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 87 | } |
| 88 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 89 | |
| 90 | netif_stop_queue(priv->dev); |
| 91 | if (priv->mesh_dev) |
| 92 | netif_stop_queue(priv->mesh_dev); |
| 93 | |
| 94 | if (priv->tx_pending_len) { |
| 95 | /* This can happen if packets come in on the mesh and eth |
| 96 | device simultaneously -- there's no mutual exclusion on |
| 97 | hard_start_xmit() calls between devices. */ |
| 98 | lbs_deb_tx("Packet on %s while busy\n", dev->name); |
| 99 | ret = NETDEV_TX_BUSY; |
| 100 | goto unlock; |
| 101 | } |
| 102 | |
| 103 | priv->tx_pending_len = -1; |
| 104 | spin_unlock_irqrestore(&priv->driver_lock, flags); |
| 105 | |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 106 | lbs_deb_hex(LBS_DEB_TX, "TX Data", skb->data, min_t(unsigned int, skb->len, 100)); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 107 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 108 | txpd = (void *)priv->tx_pending_buf; |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 109 | memset(txpd, 0, sizeof(struct txpd)); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 110 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 111 | p802x_hdr = skb->data; |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 112 | pkt_len = skb->len; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 113 | |
David Woodhouse | a97bcfe | 2007-12-09 22:00:55 -0500 | [diff] [blame] | 114 | if (dev == priv->rtap_net_dev) { |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 115 | struct tx_radiotap_hdr *rtap_hdr = (void *)skb->data; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 116 | |
| 117 | /* set txpd fields from the radiotap header */ |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 118 | txpd->tx_control = cpu_to_le32(convert_radiotap_rate_to_mv(rtap_hdr->rate)); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 119 | |
| 120 | /* skip the radiotap header */ |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 121 | p802x_hdr += sizeof(*rtap_hdr); |
| 122 | pkt_len -= sizeof(*rtap_hdr); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 123 | |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 124 | /* copy destination address from 802.11 header */ |
| 125 | memcpy(txpd->tx_dest_addr_high, p802x_hdr + 4, ETH_ALEN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 126 | } else { |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 127 | /* copy destination address from 802.3 header */ |
| 128 | memcpy(txpd->tx_dest_addr_high, p802x_hdr, ETH_ALEN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 129 | } |
| 130 | |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 131 | txpd->tx_packet_length = cpu_to_le16(pkt_len); |
| 132 | txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd)); |
| 133 | |
| 134 | if (dev == priv->mesh_dev) |
| 135 | txpd->tx_control |= cpu_to_le32(TxPD_MESH_FRAME); |
| 136 | |
| 137 | lbs_deb_hex(LBS_DEB_TX, "txpd", (u8 *) &txpd, sizeof(struct txpd)); |
| 138 | |
| 139 | lbs_deb_hex(LBS_DEB_TX, "Tx Data", (u8 *) p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
| 140 | |
| 141 | memcpy(&txpd[1], p802x_hdr, le16_to_cpu(txpd->tx_packet_length)); |
| 142 | |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 143 | spin_lock_irqsave(&priv->driver_lock, flags); |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 144 | priv->tx_pending_len = pkt_len + sizeof(struct txpd); |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 145 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 146 | lbs_deb_tx("%s lined up packet\n", __func__); |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 147 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 148 | priv->stats.tx_packets++; |
| 149 | priv->stats.tx_bytes += skb->len; |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 150 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 151 | dev->trans_start = jiffies; |
David Woodhouse | f86a93e | 2007-12-08 19:46:19 +0000 | [diff] [blame] | 152 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 153 | if (priv->monitormode != LBS_MONITOR_OFF) { |
| 154 | /* Keep the skb to echo it back once Tx feedback is |
| 155 | received from FW */ |
| 156 | skb_orphan(skb); |
David Woodhouse | a2b62dc | 2007-12-09 14:37:59 -0500 | [diff] [blame] | 157 | |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 158 | /* Keep the skb around for when we get feedback */ |
| 159 | priv->currenttxskb = skb; |
| 160 | } else { |
| 161 | free: |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 162 | dev_kfree_skb_any(skb); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 163 | } |
David Woodhouse | 2eb188a | 2007-12-09 23:54:27 -0500 | [diff] [blame^] | 164 | unlock: |
| 165 | spin_unlock_irqrestore(&priv->driver_lock, flags); |
| 166 | wake_up(&priv->waitq); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 167 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 168 | lbs_deb_leave_args(LBS_DEB_TX, "ret %d", ret); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 169 | return ret; |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * @brief This function sends to the host the last transmitted packet, |
| 174 | * filling the radiotap headers with transmission information. |
| 175 | * |
Holger Schurig | 69f9032 | 2007-11-23 15:43:44 +0100 | [diff] [blame] | 176 | * @param priv A pointer to struct lbs_private structure |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 177 | * @param status A 32 bit value containing transmission status. |
| 178 | * |
| 179 | * @returns void |
| 180 | */ |
Holger Schurig | 69f9032 | 2007-11-23 15:43:44 +0100 | [diff] [blame] | 181 | void lbs_send_tx_feedback(struct lbs_private *priv) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 182 | { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 183 | struct tx_radiotap_hdr *radiotap_hdr; |
David Woodhouse | aa21c00 | 2007-12-08 20:04:36 +0000 | [diff] [blame] | 184 | u32 status = priv->eventcause; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 185 | int txfail; |
| 186 | int try_count; |
| 187 | |
David Woodhouse | aa21c00 | 2007-12-08 20:04:36 +0000 | [diff] [blame] | 188 | if (priv->monitormode == LBS_MONITOR_OFF || |
| 189 | priv->currenttxskb == NULL) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 190 | return; |
| 191 | |
David Woodhouse | aa21c00 | 2007-12-08 20:04:36 +0000 | [diff] [blame] | 192 | radiotap_hdr = (struct tx_radiotap_hdr *)priv->currenttxskb->data; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 193 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 194 | txfail = (status >> 24); |
| 195 | |
| 196 | #if 0 |
| 197 | /* The version of roofnet that we've tested does not use this yet |
| 198 | * But it may be used in the future. |
| 199 | */ |
| 200 | if (txfail) |
| 201 | radiotap_hdr->flags &= IEEE80211_RADIOTAP_F_TX_FAIL; |
| 202 | #endif |
| 203 | try_count = (status >> 16) & 0xff; |
| 204 | radiotap_hdr->data_retries = (try_count) ? |
David Woodhouse | aa21c00 | 2007-12-08 20:04:36 +0000 | [diff] [blame] | 205 | (1 + priv->txretrycount - try_count) : 0; |
| 206 | lbs_upload_rx_packet(priv, priv->currenttxskb); |
| 207 | priv->currenttxskb = NULL; |
Brajesh Dave | 01d77d8 | 2007-11-20 17:44:14 -0500 | [diff] [blame] | 208 | |
David Woodhouse | aa21c00 | 2007-12-08 20:04:36 +0000 | [diff] [blame] | 209 | if (priv->connect_status == LBS_CONNECTED) |
Holger Schurig | 634b8f4 | 2007-05-25 13:05:16 -0400 | [diff] [blame] | 210 | netif_wake_queue(priv->dev); |
Brajesh Dave | 01d77d8 | 2007-11-20 17:44:14 -0500 | [diff] [blame] | 211 | |
David Woodhouse | aa21c00 | 2007-12-08 20:04:36 +0000 | [diff] [blame] | 212 | if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) |
Brajesh Dave | 01d77d8 | 2007-11-20 17:44:14 -0500 | [diff] [blame] | 213 | netif_wake_queue(priv->mesh_dev); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 214 | } |
Holger Schurig | 1007832 | 2007-11-15 18:05:47 -0500 | [diff] [blame] | 215 | EXPORT_SYMBOL_GPL(lbs_send_tx_feedback); |