diff options
Diffstat (limited to 'drivers/net/benet/be_main.c')
| -rw-r--r-- | drivers/net/benet/be_main.c | 1903 |
1 files changed, 1903 insertions, 0 deletions
diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c new file mode 100644 index 00000000000..897a63de5bd --- /dev/null +++ b/drivers/net/benet/be_main.c @@ -0,0 +1,1903 @@ +/* + * Copyright (C) 2005 - 2009 ServerEngines + * All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. The full GNU General + * Public License is included in this distribution in the file called COPYING. + * + * Contact Information: + * linux-drivers@serverengines.com + * + * ServerEngines + * 209 N. Fair Oaks Ave + * Sunnyvale, CA 94085 + */ + +#include "be.h" + +MODULE_VERSION(DRV_VER); +MODULE_DEVICE_TABLE(pci, be_dev_ids); +MODULE_DESCRIPTION(DRV_DESC " " DRV_VER); +MODULE_AUTHOR("ServerEngines Corporation"); +MODULE_LICENSE("GPL"); + +static unsigned int rx_frag_size = 2048; +module_param(rx_frag_size, uint, S_IRUGO); +MODULE_PARM_DESC(rx_frag_size, "Size of a fragment that holds rcvd data."); + +#define BE_VENDOR_ID 0x19a2 +#define BE2_DEVICE_ID_1 0x0211 +static DEFINE_PCI_DEVICE_TABLE(be_dev_ids) = { + { PCI_DEVICE(BE_VENDOR_ID, BE2_DEVICE_ID_1) }, + { 0 } +}; +MODULE_DEVICE_TABLE(pci, be_dev_ids); + +static void be_queue_free(struct be_adapter *adapter, struct be_queue_info *q) +{ + struct be_dma_mem *mem = &q->dma_mem; + if (mem->va) + pci_free_consistent(adapter->pdev, mem->size, + mem->va, mem->dma); +} + +static int be_queue_alloc(struct be_adapter *adapter, struct be_queue_info *q, + u16 len, u16 entry_size) +{ + struct be_dma_mem *mem = &q->dma_mem; + + memset(q, 0, sizeof(*q)); + q->len = len; + q->entry_size = entry_size; + mem->size = len * entry_size; + mem->va = pci_alloc_consistent(adapter->pdev, mem->size, &mem->dma); + if (!mem->va) + return -1; + memset(mem->va, 0, mem->size); + return 0; +} + +static inline void *queue_head_node(struct be_queue_info *q) +{ + return q->dma_mem.va + q->head * q->entry_size; +} + +static inline void *queue_tail_node(struct be_queue_info *q) +{ + return q->dma_mem.va + q->tail * q->entry_size; +} + +static inline void queue_head_inc(struct be_queue_info *q) +{ + index_inc(&q->head, q->len); +} + +static inline void queue_tail_inc(struct be_queue_info *q) +{ + index_inc(&q->tail, q->len); +} + +static void be_intr_set(struct be_ctrl_info *ctrl, bool enable) +{ + u8 __iomem *addr = ctrl->pcicfg + PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET; + u32 reg = ioread32(addr); + u32 enabled = reg & MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK; + if (!enabled && enable) { + reg |= MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK; + } else if (enabled && !enable) { + reg &= ~MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK; + } else { + printk(KERN_WARNING DRV_NAME + ": bad value in membar_int_ctrl reg=0x%x\n", reg); + return; + } + iowrite32(reg, addr); +} + +static void be_rxq_notify(struct be_ctrl_info *ctrl, u16 qid, u16 posted) +{ + u32 val = 0; + val |= qid & DB_RQ_RING_ID_MASK; + val |= posted << DB_RQ_NUM_POSTED_SHIFT; + iowrite32(val, ctrl->db + DB_RQ_OFFSET); +} + +static void be_txq_notify(struct be_ctrl_info *ctrl, u16 qid, u16 posted) +{ + u32 val = 0; + val |= qid & DB_TXULP_RING_ID_MASK; + val |= (posted & DB_TXULP_NUM_POSTED_MASK) << DB_TXULP_NUM_POSTED_SHIFT; + iowrite32(val, ctrl->db + DB_TXULP1_OFFSET); +} + +static void be_eq_notify(struct be_ctrl_info *ctrl, u16 qid, + bool arm, bool clear_int, u16 num_popped) +{ + u32 val = 0; + val |= qid & DB_EQ_RING_ID_MASK; + if (arm) + val |= 1 << DB_EQ_REARM_SHIFT; + if (clear_int) + val |= 1 << DB_EQ_CLR_SHIFT; + val |= 1 << DB_EQ_EVNT_SHIFT; + val |= num_popped << DB_EQ_NUM_POPPED_SHIFT; + iowrite32(val, ctrl->db + DB_EQ_OFFSET); +} + +static void be_cq_notify(struct be_ctrl_info *ctrl, u16 qid, + bool arm, u16 num_popped) +{ + u32 val = 0; + val |= qid & DB_CQ_RING_ID_MASK; + if (arm) + val |= 1 << DB_CQ_REARM_SHIFT; + val |= num_popped << DB_CQ_NUM_POPPED_SHIFT; + iowrite32(val, ctrl->db + DB_CQ_OFFSET); +} + + +static int be_mac_addr_set(struct net_device *netdev, void *p) +{ + struct be_adapter *adapter = netdev_priv(netdev); + struct sockaddr *addr = p; + int status = 0; + + if (netif_running(netdev)) { + status = be_cmd_pmac_del(&adapter->ctrl, adapter->if_handle, + adapter->pmac_id); + if (status) + return status; + + status = be_cmd_pmac_add(&adapter->ctrl, (u8 *)addr->sa_data, + adapter->if_handle, &adapter->pmac_id); + } + + if (!status) + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); + + return status; +} + +static void netdev_stats_update(struct be_adapter *adapter) +{ + struct be_hw_stats *hw_stats = hw_stats_from_cmd(adapter->stats.cmd.va); + struct be_rxf_stats *rxf_stats = &hw_stats->rxf; + struct be_port_rxf_stats *port_stats = + &rxf_stats->port[adapter->port_num]; + struct net_device_stats *dev_stats = &adapter->stats.net_stats; + + dev_stats->rx_packets = port_stats->rx_total_frames; + dev_stats->tx_packets = port_stats->tx_unicastframes + + port_stats->tx_multicastframes + port_stats->tx_broadcastframes; + dev_stats->rx_bytes = (u64) port_stats->rx_bytes_msd << 32 | + (u64) port_stats->rx_bytes_lsd; + dev_stats->tx_bytes = (u64) port_stats->tx_bytes_msd << 32 | + (u64) port_stats->tx_bytes_lsd; + + /* bad pkts received */ + dev_stats->rx_errors = port_stats->rx_crc_errors + + port_stats->rx_alignment_symbol_errors + + port_stats->rx_in_range_errors + + port_stats->rx_out_range_errors + port_stats->rx_frame_too_long; + + /* packet transmit problems */ + dev_stats->tx_errors = 0; + + /* no space in linux buffers */ + dev_stats->rx_dropped = 0; + + /* no space available in linux */ + dev_stats->tx_dropped = 0; + + dev_stats->multicast = port_stats->tx_multicastframes; + dev_stats->collisions = 0; + + /* detailed rx errors */ + dev_stats->rx_length_errors = port_stats->rx_in_range_errors + + port_stats->rx_out_range_errors + port_stats->rx_frame_too_long; + /* receive ring buffer overflow */ + dev_stats->rx_over_errors = 0; + dev_stats->rx_crc_errors = port_stats->rx_crc_errors; + + /* frame alignment errors */ + dev_stats->rx_frame_errors = port_stats->rx_alignment_symbol_errors; + /* receiver fifo overrun */ + /* drops_no_pbuf is no per i/f, it's per BE card */ + dev_stats->rx_fifo_errors = port_stats->rx_fifo_overflow + + port_stats->rx_input_fifo_overflow + + rxf_stats->rx_drops_no_pbuf; + /* receiver missed packetd */ + dev_stats->rx_missed_errors = 0; + /* detailed tx_errors */ + dev_stats->tx_aborted_errors = 0; + dev_stats->tx_carrier_errors = 0; + dev_stats->tx_fifo_errors = 0; + dev_stats->tx_heartbeat_errors = 0; + dev_stats->tx_window_errors = 0; +} + +static void be_link_status_update(struct be_adapter *adapter) +{ + struct be_link_info *prev = &adapter->link; + struct be_link_info now = { 0 }; + struct net_device *netdev = adapter->netdev; + + be_cmd_link_status_query(&adapter->ctrl, &now); + + /* If link came up or went down */ + if (now.speed != prev->speed && (now.speed == PHY_LINK_SPEED_ZERO || + prev->speed == PHY_LINK_SPEED_ZERO)) { + if (now.speed == PHY_LINK_SPEED_ZERO) { + netif_stop_queue(netdev); + netif_carrier_off(netdev); + printk(KERN_INFO "%s: Link down\n", netdev->name); + } else { + netif_start_queue(netdev); + netif_carrier_on(netdev); + printk(KERN_INFO "%s: Link up\n", netdev->name); + } + } + *prev = now; +} + +/* Update the EQ delay n BE based on the RX frags consumed / sec */ +static void be_rx_eqd_update(struct be_adapter *adapter) +{ + u32 eqd; + struct be_ctrl_info *ctrl = &adapter->ctrl; + struct be_eq_obj *rx_eq = &adapter->rx_eq; + struct be_drvr_stats *stats = &adapter->stats.drvr_stats; + + /* Update once a second */ + if (((jiffies - stats->rx_fps_jiffies) < HZ) || rx_eq->enable_aic == 0) + return; + + stats->be_rx_fps = (stats->be_rx_frags - stats->be_prev_rx_frags) / + ((jiffies - stats->rx_fps_jiffies) / HZ); + + stats->rx_fps_jiffies = jiffies; + stats->be_prev_rx_frags = stats->be_rx_frags; + eqd = stats->be_rx_fps / 110000; + eqd = eqd << 3; + if (eqd > rx_eq->max_eqd) + eqd = rx_eq->max_eqd; + if (eqd < rx_eq->min_eqd) + eqd = rx_eq->min_eqd; + if (eqd < 10) + eqd = 0; + if (eqd != rx_eq->cur_eqd) + be_cmd_modify_eqd(ctrl, rx_eq->q.id, eqd); + + rx_eq->cur_eqd = eqd; +} + +static void be_worker(struct work_struct *work) +{ + struct be_adapter *adapter = + container_of(work, struct be_adapter, work.work); + int status; + + /* Check link */ + be_link_status_update(adapter); + + /* Get Stats */ + status = be_cmd_get_stats(&adapter->ctrl, &adapter->stats.cmd); + if (!status) + netdev_stats_update(adapter); + + /* Set EQ delay */ + be_rx_eqd_update(adapter); + + schedule_delayed_work(&adapter->work, msecs_to_jiffies(1000)); +} + +static struct net_device_stats *be_get_stats(struct net_device *dev) +{ + struct be_adapter *adapter = netdev_priv(dev); + + return &adapter->stats.net_stats; +} + +static void be_tx_stats_update(struct be_adapter *adapter, + u32 wrb_cnt, u32 copied, bool stopped) +{ + struct be_drvr_stats *stats = &adapter->stats.drvr_stats; + stats->be_tx_reqs++; + stats->be_tx_wrbs += wrb_cnt; + stats->be_tx_bytes += copied; + if (stopped) + stats->be_tx_stops++; + + /* Update tx rate once in two seconds */ + if ((jiffies - stats->be_tx_jiffies) > 2 * HZ) { + u32 r; + r = (stats->be_tx_bytes - stats->be_tx_bytes_prev) / + ((u32) (jiffies - stats->be_tx_jiffies) / HZ); + r = (r / 1000000); /* M bytes/s */ + stats->be_tx_rate = (r * 8); /* M bits/s */ + stats->be_tx_jiffies = jiffies; + stats->be_tx_bytes_prev = stats->be_tx_bytes; + } +} + +/* Determine number of WRB entries needed to xmit data in an skb */ +static u32 wrb_cnt_for_skb(struct sk_buff *skb, bool *dummy) +{ + int cnt = 0; + while (skb) { + if (skb->len > skb->data_len) + cnt++; + cnt += skb_shinfo(skb)->nr_frags; + skb = skb_shinfo(skb)->frag_list; + } + /* to account for hdr wrb */ + cnt++; + if (cnt & 1) { + /* add a dummy to make it an even num */ + cnt++; + *dummy = true; + } else + *dummy = false; + BUG_ON(cnt > BE_MAX_TX_FRAG_COUNT); + return cnt; +} + +static inline void wrb_fill(struct be_eth_wrb *wrb, u64 addr, int len) +{ + wrb->frag_pa_hi = upper_32_bits(addr); + wrb->frag_pa_lo = addr & 0xFFFFFFFF; + wrb->frag_len = len & ETH_WRB_FRAG_LEN_MASK; +} + +static void wrb_fill_hdr(struct be_eth_hdr_wrb *hdr, struct sk_buff *skb, + bool vlan, u32 wrb_cnt, u32 len) +{ + memset(hdr, 0, sizeof(*hdr)); + + AMAP_SET_BITS(struct amap_eth_hdr_wrb, crc, hdr, 1); + + if (skb_shinfo(skb)->gso_segs > 1 && skb_shinfo(skb)->gso_size) { + AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso, hdr, 1); + AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso_mss, + hdr, skb_shinfo(skb)->gso_size); + } else if (skb->ip_summed == CHECKSUM_PARTIAL) { + if (is_tcp_pkt(skb)) + AMAP_SET_BITS(struct amap_eth_hdr_wrb, tcpcs, hdr, 1); + else if (is_udp_pkt(skb)) + AMAP_SET_BITS(struct amap_eth_hdr_wrb, udpcs, hdr, 1); + } + + if (vlan && vlan_tx_tag_present(skb)) { + AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan, hdr, 1); + AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan_tag, + hdr, vlan_tx_tag_get(skb)); + } + + AMAP_SET_BITS(struct amap_eth_hdr_wrb, event, hdr, 1); + AMAP_SET_BITS(struct amap_eth_hdr_wrb, complete, hdr, 1); + AMAP_SET_BITS(struct amap_eth_hdr_wrb, num_wrb, hdr, wrb_cnt); + AMAP_SET_BITS(struct amap_eth_hdr_wrb, len, hdr, len); +} + + +static int make_tx_wrbs(struct be_adapter *adapter, + struct sk_buff *skb, u32 wrb_cnt, bool dummy_wrb) +{ + u64 busaddr; + u32 i, copied = 0; + struct pci_dev *pdev = adapter->pdev; + struct sk_buff *first_skb = skb; + struct be_queue_info *txq = &adapter->tx_obj.q; + struct be_eth_wrb *wrb; + struct be_eth_hdr_wrb *hdr; + + atomic_add(wrb_cnt, &txq->used); + hdr = queue_head_node(txq); + queue_head_inc(txq); + + while (skb) { + if (skb->len > skb->data_len) { + int len = skb->len - skb->data_len; + busaddr = pci_map_single(pdev, skb->data, len, + PCI_DMA_TODEVICE); + wrb = queue_head_node(txq); + wrb_fill(wrb, busaddr, len); + be_dws_cpu_to_le(wrb, sizeof(*wrb)); + queue_head_inc(txq); + copied += len; + } + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + struct skb_frag_struct *frag = + &skb_shinfo(skb)->frags[i]; + busaddr = pci_map_page(pdev, frag->page, + frag->page_offset, + frag->size, PCI_DMA_TODEVICE); + wrb = queue_head_node(txq); + wrb_fill(wrb, busaddr, frag->size); + be_dws_cpu_to_le(wrb, sizeof(*wrb)); + queue_head_inc(txq); + copied += frag->size; + } + skb = skb_shinfo(skb)->frag_list; + } + + if (dummy_wrb) { + wrb = queue_head_node(txq); + wrb_fill(wrb, 0, 0); + be_dws_cpu_to_le(wrb, sizeof(*wrb)); + queue_head_inc(txq); + } + + wrb_fill_hdr(hdr, first_skb, adapter->vlan_grp ? true : false, + wrb_cnt, copied); + be_dws_cpu_to_le(hdr, sizeof(*hdr)); + + return copied; +} + +static int be_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + struct be_adapter *adapter = netdev_priv(netdev); + struct be_tx_obj *tx_obj = &adapter->tx_obj; + struct be_queue_info *txq = &tx_obj->q; + u32 wrb_cnt = 0, copied = 0; + u32 start = txq->head; + bool dummy_wrb, stopped = false; + + wrb_cnt = wrb_cnt_for_skb(skb, &dummy_wrb); + + copied = make_tx_wrbs(adapter, skb, wrb_cnt, dummy_wrb); + + /* record the sent skb in the sent_skb table */ + BUG_ON(tx_obj->sent_skb_list[start]); + tx_obj->sent_skb_list[start] = skb; + + /* Ensure that txq has space for the next skb; Else stop the queue + * *BEFORE* ringing the tx doorbell, so that we serialze the + * tx compls of the current transmit which'll wake up the queue + */ + if ((BE_MAX_TX_FRAG_COUNT + atomic_read(&txq->used)) >= txq->len) { + netif_stop_queue(netdev); + stopped = true; + } + + be_txq_notify(&adapter->ctrl, txq->id, wrb_cnt); + + netdev->trans_start = jiffies; + + be_tx_stats_update(adapter, wrb_cnt, copied, stopped); + return NETDEV_TX_OK; +} + +static int be_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct be_adapter *adapter = netdev_priv(netdev); + if (new_mtu < BE_MIN_MTU || + new_mtu > BE_MAX_JUMBO_FRAME_SIZE) { + dev_info(&adapter->pdev->dev, + "MTU must be between %d and %d bytes\n", + BE_MIN_MTU, BE_MAX_JUMBO_FRAME_SIZE); + return -EINVAL; + } + dev_info(&adapter->pdev->dev, "MTU changed from %d to %d bytes\n", + netdev->mtu, new_mtu); + netdev->mtu = new_mtu; + return 0; +} + +/* + * if there are BE_NUM_VLANS_SUPPORTED or lesser number of VLANS configured, + * program them in BE. If more than BE_NUM_VLANS_SUPPORTED are configured, + * set the BE in promiscuous VLAN mode. + */ +static void be_vids_config(struct net_device *netdev) +{ + struct be_adapter *adapter = netdev_priv(netdev); + u16 vtag[BE_NUM_VLANS_SUPPORTED]; + u16 ntags = 0, i; + + if (adapter->num_vlans <= BE_NUM_VLANS_SUPPORTED) { + /* Construct VLAN Table to give to HW */ + for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) { + if (adapter->vlan_tag[i]) { + vtag[ntags] = cpu_to_le16(i); + ntags++; + } + } + be_cmd_vlan_config(&adapter->ctrl, adapter->if_handle, + vtag, ntags, 1, 0); + } else { + be_cmd_vlan_config(&adapter->ctrl, adapter->if_handle, + NULL, 0, 1, 1); + } +} + +static void be_vlan_register(struct net_device *netdev, struct vlan_group *grp) +{ + struct be_adapter *adapter = netdev_priv(netdev); + struct be_eq_obj *rx_eq = &adapter->rx_eq; + struct be_eq_obj *tx_eq = &adapter->tx_eq; + struct be_ctrl_info *ctrl = &adapter->ctrl; + + be_eq_notify(ctrl, rx_eq->q.id, false, false, 0); + be_eq_notify(ctrl, tx_eq->q.id, false, false, 0); + adapter->vlan_grp = grp; + be_eq_notify(ctrl, rx_eq->q.id, true, false, 0); + be_eq_notify(ctrl, tx_eq->q.id, true, false, 0); +} + +static void be_vlan_add_vid(struct net_device *netdev, u16 vid) +{ + struct be_adapter *adapter = netdev_priv(netdev); + + adapter->num_vlans++; + adapter->vlan_tag[vid] = 1; + + be_vids_config(netdev); +} + +static void be_vlan_rem_vid(struct net_device *netdev, u16 vid) +{ + struct be_adapter *adapter = netdev_priv(netdev); + + adapter->num_vlans--; + adapter->vlan_tag[vid] = 0; + + vlan_group_set_device(adapter->vlan_grp, vid, NULL); + be_vids_config(netdev); +} + +static void be_set_multicast_filter(struct net_device *netdev) +{ + struct be_adapter *adapter = netdev_priv(netdev); + struct dev_mc_list *mc_ptr; + u8 mac_addr[32][ETH_ALEN]; + int i = 0; + + if (netdev->flags & IFF_ALLMULTI) { + /* set BE in Multicast promiscuous */ + be_cmd_mcast_mac_set(&adapter->ctrl, + adapter->if_handle, NULL, 0, true); + return; + } + + for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) { + memcpy(&mac_addr[i][0], mc_ptr->dmi_addr, ETH_ALEN); + if (++i >= 32) { + be_cmd_mcast_mac_set(&adapter->ctrl, + adapter->if_handle, &mac_addr[0][0], i, false); + i = 0; + } + + } + + if (i) { + /* reset the promiscuous mode also. */ + be_cmd_mcast_mac_set(&adapter->ctrl, + adapter->if_handle, &mac_addr[0][0], i, false); + } +} + +static void be_set_multicast_list(struct net_device *netdev) +{ + struct be_adapter *adapter = netdev_priv(netdev); + + if (netdev->flags & IFF_PROMISC) { + be_cmd_promiscuous_config(&adapter->ctrl, adapter->port_num, 1); + } else { + be_cmd_promiscuous_config(&adapter->ctrl, adapter->port_num, 0); + be_set_multicast_filter(netdev); + } +} + +static void be_rx_rate_update(struct be_adapter *adapter, u32 pktsize, + u16 numfrags) +{ + struct be_drvr_stats *stats = &adapter->stats.drvr_stats; + u32 rate; + + stats->be_rx_compl++; + stats->be_rx_frags += numfrags; + stats->be_rx_bytes += pktsize; + + /* Update the rate once in two seconds */ + if ((jiffies - stats->be_rx_jiffies) < 2 * HZ) + return; + + rate = (stats->be_rx_bytes - stats->be_rx_bytes_prev) / + ((u32) (jiffies - stats->be_rx_jiffies) / HZ); + rate = (rate / 1000000); /* MB/Sec */ + stats->be_rx_rate = (rate * 8); /* Mega Bits/Sec */ + stats->be_rx_jiffies = jiffies; + stats->be_rx_bytes_prev = stats->be_rx_bytes; +} + +static struct be_rx_page_info * +get_rx_page_info(struct be_adapter *adapter, u16 frag_idx) +{ + struct be_rx_page_info *rx_page_info; + struct be_queue_info *rxq = &adapter->rx_obj.q; + + rx_page_info = &adapter->rx_obj.page_info_tbl[frag_idx]; + BUG_ON(!rx_page_info->page); + + if (rx_page_info->last_page_user) + pci_unmap_page(adapter->pdev, pci_unmap_addr(rx_page_info, bus), + adapter->big_page_size, PCI_DMA_FROMDEVICE); + + atomic_dec(&rxq->used); + return rx_page_info; +} + +/* Throwaway the data in the Rx completion */ +static void be_rx_compl_discard(struct be_adapter *adapter, + struct be_eth_rx_compl *rxcp) +{ + struct be_queue_info *rxq = &adapter->rx_obj.q; + struct be_rx_page_info *page_info; + u16 rxq_idx, i, num_rcvd; + + rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp); + num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp); + + for (i = 0; i < num_rcvd; i++) { + page_info = get_rx_page_info(adapter, rxq_idx); + put_page(page_info->page); + memset(page_info, 0, sizeof(*page_info)); + index_inc(&rxq_idx, rxq->len); + } +} + +/* + * skb_fill_rx_data forms a complete skb for an ether frame + * indicated by rxcp. + */ +static void skb_fill_rx_data(struct be_adapter *adapter, + struct sk_buff *skb, struct be_eth_rx_compl *rxcp) +{ + struct be_queue_info *rxq = &adapter->rx_obj.q; + struct be_rx_page_info *page_info; + u16 rxq_idx, i, num_rcvd; + u32 pktsize, hdr_len, curr_frag_len; + u8 *start; + + rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp); + pktsize = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp); + num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp); + + page_info = get_rx_page_info(adapter, rxq_idx); + + start = page_address(page_info->page) + page_info->page_offset; + prefetch(start); + + /* Copy data in the first descriptor of this completion */ + curr_frag_len = min(pktsize, rx_frag_size); + + /* Copy the header portion into skb_data */ + hdr_len = min((u32)BE_HDR_LEN, curr_frag_len); + memcpy(skb->data, start, hdr_len); + skb->len = curr_frag_len; + if (curr_frag_len <= BE_HDR_LEN) { /* tiny packet */ + /* Complete packet has now been moved to data */ + put_page(page_info->page); + skb->data_len = 0; + skb->tail += curr_frag_len; + } else { + skb_shinfo(skb)->nr_frags = 1; + skb_shinfo(skb)->frags[0].page = page_info->page; + skb_shinfo(skb)->frags[0].page_offset = + page_info->page_offset + hdr_len; + skb_shinfo(skb)->frags[0].size = curr_frag_len - hdr_len; + skb->data_len = curr_frag_len - hdr_len; + skb->tail += hdr_len; + } + memset(page_info, 0, sizeof(*page_info)); + + if (pktsize <= rx_frag_size) { + BUG_ON(num_rcvd != 1); + return; + } + + /* More frags present for this completion */ + pktsize -= curr_frag_len; /* account for above copied frag */ + for (i = 1; i < num_rcvd; i++) { + index_inc(&rxq_idx, rxq->len); + page_info = get_rx_page_info(adapter, rxq_idx); + + curr_frag_len = min(pktsize, rx_frag_size); + + skb_shinfo(skb)->frags[i].page = page_info->page; + skb_shinfo(skb)->frags[i].page_offset = page_info->page_offset; + skb_shinfo(skb)->frags[i].size = curr_frag_len; + skb->len += curr_frag_len; + skb->data_len += curr_frag_len; + skb_shinfo(skb)->nr_frags++; + pktsize -= curr_frag_len; + + memset(page_info, 0, sizeof(*page_info)); + } + + be_rx_rate_update(adapter, pktsize, num_rcvd); + return; +} + +/* Process the RX completion indicated by rxcp when LRO is disabled */ +static void be_rx_compl_process(struct be_adapter *adapter, + struct be_eth_rx_compl *rxcp) +{ + struct sk_buff *skb; + u32 vtp, vid; + int l4_cksm; + + l4_cksm = AMAP_GET_BITS(struct amap_eth_rx_compl, l4_cksm, rxcp); + vtp = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp); + + skb = netdev_alloc_skb(adapter->netdev, BE_HDR_LEN + NET_IP_ALIGN); + if (!skb) { + if (net_ratelimit()) + dev_warn(&adapter->pdev->dev, "skb alloc failed\n"); + be_rx_compl_discard(adapter, rxcp); + return; + } + + skb_reserve(skb, NET_IP_ALIGN); + + skb_fill_rx_data(adapter, skb, rxcp); + + if (l4_cksm && adapter->rx_csum) + skb->ip_summed = CHECKSUM_UNNECESSARY; + else + skb->ip_summed = CHECKSUM_NONE; + + skb->truesize = skb->len + sizeof(struct sk_buff); + skb->protocol = eth_type_trans(skb, adapter->netdev); + skb->dev = adapter->netdev; + + if (vtp) { + if (!adapter->vlan_grp || adapter->num_vlans == 0) { + kfree_skb(skb); + return; + } + vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp); + vid = be16_to_cpu(vid); + vlan_hwaccel_receive_skb(skb, adapter->vlan_grp, vid); + } else { + netif_receive_skb(skb); + } + + adapter->netdev->last_rx = jiffies; + + return; +} + +/* Process the RX completion indicated by rxcp when LRO is enabled */ +static void be_rx_compl_process_lro(struct be_adapter *adapter, + struct be_eth_rx_compl *rxcp) +{ + struct be_rx_page_info *page_info; + struct skb_frag_struct rx_frags[BE_MAX_FRAGS_PER_FRAME]; + struct be_queue_info *rxq = &adapter->rx_obj.q; + u32 num_rcvd, pkt_size, remaining, vlanf, curr_frag_len; + u16 i, rxq_idx = 0, vid; + + num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp); + pkt_size = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp); + vlanf = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp); + rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp); + + remaining = pkt_size; + for (i = 0; i < num_rcvd; i++) { + page_info = get_rx_page_info(adapter, rxq_idx); + + curr_frag_len = min(remaining, rx_frag_size); + + rx_frags[i].page = page_info->page; + rx_frags[i].page_offset = page_info->page_offset; + rx_frags[i].size = curr_frag_len; + remaining -= curr_frag_len; + + index_inc(&rxq_idx, rxq->len); + + memset(page_info, 0, sizeof(*page_info)); + } + + if (likely(!vlanf)) { + lro_receive_frags(&adapter->rx_obj.lro_mgr, rx_frags, pkt_size, + pkt_size, NULL, 0); + } else { + vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp); + vid = be16_to_cpu(vid); + + if (!adapter->vlan_grp || adapter->num_vlans == 0) + return; + + lro_vlan_hwaccel_receive_frags(&adapter->rx_obj.lro_mgr, + rx_frags, pkt_size, pkt_size, adapter->vlan_grp, + vid, NULL, 0); + } + + be_rx_rate_update(adapter, pkt_size, num_rcvd); + return; +} + +static struct be_eth_rx_compl *be_rx_compl_get(struct be_adapter *adapter) +{ + struct be_eth_rx_compl *rxcp = queue_tail_node(&adapter->rx_obj.cq); + + if (rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] == 0) + return NULL; + + be_dws_le_to_cpu(rxcp, sizeof(*rxcp)); + + rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] = 0; + + queue_tail_inc(&adapter->rx_obj.cq); + return rxcp; +} + +static inline struct page *be_alloc_pages(u32 size) +{ + gfp_t alloc_flags = GFP_ATOMIC; + u32 order = get_order(size); + if (order > 0) + alloc_flags |= __GFP_COMP; + return alloc_pages(alloc_flags, order); +} + +/* + * Allocate a page, split it to fragments of size rx_frag_size and post as + * receive buffers to BE + */ +static void be_post_rx_frags(struct be_adapter *adapter) +{ + struct be_rx_page_info *page_info_tbl = adapter->rx_obj.page_info_tbl; + struct be_rx_page_info *page_info = NULL; + struct be_queue_info *rxq = &adapter->rx_obj.q; + struct page *pagep = NULL; + struct be_eth_rx_d *rxd; + u64 page_dmaaddr = 0, frag_dmaaddr; + u32 posted, page_offset = 0; + + + page_info = &page_info_tbl[rxq->head]; + for (posted = 0; posted < MAX_RX_POST && !page_info->page; posted++) { + if (!pagep) { + pagep = be_alloc_pages(adapter->big_page_size); + if (unlikely(!pagep)) { + drvr_stats(adapter)->be_ethrx_post_fail++; + break; + } + page_dmaaddr = pci_map_page(adapter->pdev, pagep, 0, + adapter->big_page_size, + PCI_DMA_FROMDEVICE); + page_info->page_offset = 0; + } else { + get_page(pagep); + page_info->page_offset = page_offset + rx_frag_size; + } + page_offset = page_info->page_offset; + page_info->page = pagep; + pci_unmap_addr_set(page_info, bus, page_dmaaddr); + frag_dmaaddr = page_dmaaddr + page_info->page_offset; + + rxd = queue_head_node(rxq); + rxd->fragpa_lo = cpu_to_le32(frag_dmaaddr & 0xFFFFFFFF); + rxd->fragpa_hi = cpu_to_le32(upper_32_bits(frag_dmaaddr)); + queue_head_inc(rxq); + + /* Any space left in the current big page for another frag? */ + if ((page_offset + rx_frag_size + rx_frag_size) > + adapter->big_page_size) { + pagep = NULL; + page_info->last_page_user = true; + } + page_info = &page_info_tbl[rxq->head]; + } + if (pagep) + page_info->last_page_user = true; + + if (posted) { + be_rxq_notify(&adapter->ctrl, rxq->id, posted); + atomic_add(posted, &rxq->used); + } + + return; +} + +static struct be_eth_tx_compl * +be_tx_compl_get(struct be_adapter *adapter) +{ + struct be_queue_info *tx_cq = &adapter->tx_obj.cq; + struct be_eth_tx_compl *txcp = queue_tail_node(tx_cq); + + if (txcp->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] == 0) + return NULL; + + be_dws_le_to_cpu(txcp, sizeof(*txcp)); + + txcp->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] = 0; + + queue_tail_inc(tx_cq); + return txcp; +} + +static void be_tx_compl_process(struct be_adapter *adapter, u16 last_index) +{ + struct be_queue_info *txq = &adapter->tx_obj.q; + struct be_eth_wrb *wrb; + struct sk_buff **sent_skbs = adapter->tx_obj.sent_skb_list; + struct sk_buff *sent_skb; + u64 busaddr; + u16 cur_index, num_wrbs = 0; + + cur_index = txq->tail; + sent_skb = sent_skbs[cur_index]; + BUG_ON(!sent_skb); + sent_skbs[cur_index] = NULL; + + do { + cur_index = txq->tail; + wrb = queue_tail_node(txq); + be_dws_le_to_cpu(wrb, sizeof(*wrb)); + busaddr = ((u64)wrb->frag_pa_hi << 32) | (u64)wrb->frag_pa_lo; + if (busaddr != 0) { + pci_unmap_single(adapter->pdev, busaddr, + wrb->frag_len, PCI_DMA_TODEVICE); + } + num_wrbs++; + queue_tail_inc(txq); + } while (cur_index != last_index); + + atomic_sub(num_wrbs, &txq->used); + + kfree_skb(sent_skb); +} + +static void be_rx_q_clean(struct be_adapter *adapter) +{ + struct be_rx_page_info *page_info; + struct be_queue_info *rxq = &adapter->rx_obj.q; + struct be_queue_info *rx_cq = &adapter->rx_obj.cq; + struct be_eth_rx_compl *rxcp; + u16 tail; + + /* First cleanup pending rx completions */ + while ((rxcp = be_rx_compl_get(adapter)) != NULL) { + be_rx_compl_discard(adapter, rxcp); + be_cq_notify(&adapter->ctrl, rx_cq->id, true, 1); + } + + /* Then free posted rx buffer that were not used */ + tail = (rxq->head + rxq->len - atomic_read(&rxq->used)) % rxq->len; + for (; tail != rxq->head; index_inc(&tail, rxq->len)) { + page_info = get_rx_page_info(adapter, tail); + put_page(page_info->page); + memset(page_info, 0, sizeof(*page_info)); + } + BUG_ON(atomic_read(&rxq->used)); +} + +static void be_tx_q_clean(struct be_adapter *adapter) +{ + struct sk_buff **sent_skbs = adapter->tx_obj.sent_skb_list; + struct sk_buff *sent_skb; + struct be_queue_info *txq = &adapter->tx_obj.q; + u16 last_index; + bool dummy_wrb; + + while (atomic_read(&txq->used)) { + sent_skb = sent_skbs[txq->tail]; + last_index = txq->tail; + index_adv(&last_index, + wrb_cnt_for_skb(sent_skb, &dummy_wrb) - 1, txq->len); + be_tx_compl_process(adapter, last_index); + } +} + +static void be_tx_queues_destroy(struct be_adapter *adapter) +{ + struct be_queue_info *q; + + q = &adapter->tx_obj.q; + if (q->created) + be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_TXQ); + be_queue_free(adapter, q); + + q = &adapter->tx_obj.cq; + if (q->created) + be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_CQ); + be_queue_free(adapter, q); + + /* No more tx completions can be rcvd now; clean up if there are + * any pending completions or pending tx requests */ + be_tx_q_clean(adapter); + + q = &adapter->tx_eq.q; + if (q->created) + be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_EQ); + be_queue_free(adapter, q); +} + +static int be_tx_queues_create(struct be_adapter *adapter) +{ + struct be_queue_info *eq, *q, *cq; + + adapter->tx_eq.max_eqd = 0; + adapter->tx_eq.min_eqd = 0; + adapter->tx_eq.cur_eqd = 96; + adapter->tx_eq.enable_aic = false; + /* Alloc Tx Event queue */ + eq = &adapter->tx_eq.q; + if (be_queue_alloc(adapter, eq, EVNT_Q_LEN, sizeof(struct be_eq_entry))) + return -1; + + /* Ask BE to create Tx Event queue */ + if (be_cmd_eq_create(&adapter->ctrl, eq, adapter->tx_eq.cur_eqd)) + goto tx_eq_free; + /* Alloc TX eth compl queue */ + cq = &adapter->tx_obj.cq; + if (be_queue_alloc(adapter, cq, TX_CQ_LEN, + sizeof(struct be_eth_tx_compl))) + goto tx_eq_destroy; + + /* Ask BE to create Tx eth compl queue */ + if (be_cmd_cq_create(&adapter->ctrl, cq, eq, false, false, 3)) + goto tx_cq_free; + + /* Alloc TX eth queue */ + q = &adapter->tx_obj.q; + if (be_queue_alloc(adapter, q, TX_Q_LEN, sizeof(struct be_eth_wrb))) + goto tx_cq_destroy; + + /* Ask BE to create Tx eth queue */ + if (be_cmd_txq_create(&adapter->ctrl, q, cq)) + goto tx_q_free; + return 0; + +tx_q_free: + be_queue_free(adapter, q); +tx_cq_destroy: + be_cmd_q_destroy(&adapter->ctrl, cq, QTYPE_CQ); +tx_cq_free: + be_queue_free(adapter, cq); +tx_eq_destroy: + be_cmd_q_destroy(&adapter->ctrl, eq, QTYPE_EQ); +tx_eq_free: + be_queue_free(adapter, eq); + return -1; +} + +static void be_rx_queues_destroy(struct be_adapter *adapter) +{ + struct be_queue_info *q; + + q = &adapter->rx_obj.q; + if (q->created) { + be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_RXQ); + be_rx_q_clean(adapter); + } + be_queue_free(adapter, q); + + q = &adapter->rx_obj.cq; + if (q->created) + be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_CQ); + be_queue_free(adapter, q); + + q = &adapter->rx_eq.q; + if (q->created) + be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_EQ); + be_queue_free(adapter, q); +} + +static int be_rx_queues_create(struct be_adapter *adapter) +{ + struct be_queue_info *eq, *q, *cq; + int rc; + + adapter->max_rx_coal = BE_MAX_FRAGS_PER_FRAME; + adapter->big_page_size = (1 << get_order(rx_frag_size)) * PAGE_SIZE; + adapter->rx_eq.max_eqd = BE_MAX_EQD; + adapter->rx_eq.min_eqd = 0; + adapter->rx_eq.cur_eqd = 0; + adapter->rx_eq.enable_aic = true; + + /* Alloc Rx Event queue */ + eq = &adapter->rx_eq.q; + rc = be_queue_alloc(adapter, eq, EVNT_Q_LEN, + sizeof(struct be_eq_entry)); + if (rc) + return rc; + + /* Ask BE to create Rx Event queue */ + rc = be_cmd_eq_create(&adapter->ctrl, eq, adapter->rx_eq.cur_eqd); + if (rc) + goto rx_eq_free; + + /* Alloc RX eth compl queue */ + cq = &adapter->rx_obj.cq; + rc = be_queue_alloc(adapter, cq, RX_CQ_LEN, + sizeof(struct be_eth_rx_compl)); + if (rc) + goto rx_eq_destroy; + + /* Ask BE to create Rx eth compl queue */ + rc = be_cmd_cq_create(&adapter->ctrl, cq, eq, false, false, 3); + if (rc) + goto rx_cq_free; + + /* Alloc RX eth queue */ + q = &adapter->rx_obj.q; + rc = be_queue_alloc(adapter, q, RX_Q_LEN, sizeof(struct be_eth_rx_d)); + if (rc) + goto rx_cq_destroy; + + /* Ask BE to create Rx eth queue */ + rc = be_cmd_rxq_create(&adapter->ctrl, q, cq->id, rx_frag_size, + BE_MAX_JUMBO_FRAME_SIZE, adapter->if_handle, false); + if (rc) + goto rx_q_free; + + return 0; +rx_q_free: + be_queue_free(adapter, q); +rx_cq_destroy: + be_cmd_q_destroy(&adapter->ctrl, cq, QTYPE_CQ); +rx_cq_free: + be_queue_free(adapter, cq); +rx_eq_destroy: |