new file mode 100644
@@ -0,0 +1,1885 @@
+/*
+ * 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 "Ver:" DRV_VER);
+MODULE_AUTHOR("ServerEngines");
+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
+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 *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;
+
+ 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;
+}
+
+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);
+ dev_info(&adapter->netdev->dev, "Link down\n");
+ } else {
+ netif_start_queue(netdev);
+ netif_carrier_on(netdev);
+ dev_info(&adapter->netdev->dev, "Link up\n");
+ }
+ }
+ *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));
+}
+
+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)
+{
+ if (new_mtu < BE_MIN_MTU ||
+ new_mtu > BE_MAX_JUMBO_FRAME_SIZE) {
+ dev_warn(&netdev->dev, "MTU must be between %d and %d bytes\n",
+ BE_MIN_MTU, BE_MAX_JUMBO_FRAME_SIZE);
+ return -EINVAL;
+ }
+ dev_info(&netdev->dev, "MTU changed from %d to %d bytes\n",
+ netdev->mtu, new_mtu);
+ netdev->mtu = new_mtu;
+ return 0;
+}
+
+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 vlan_id)
+{
+ struct be_adapter *adapter = netdev_priv(netdev);
+
+ if (adapter->num_vlans < BE_NUM_VLANS_SUPPORTED) {
+ adapter->vlan_tag[adapter->num_vlans++] = cpu_to_le16(vlan_id);
+ be_cmd_vlan_config(&adapter->ctrl, adapter->if_handle,
+ adapter->vlan_tag, adapter->num_vlans, 1, 0);
+ } else {
+ printk(KERN_ERR DRV_NAME " : Cannot add more than %d vlans\n",
+ BE_NUM_VLANS_SUPPORTED);
+ }
+}
+
+static void be_vlan_rem_vid(struct net_device *netdev, u16 vlan_id)
+{
+ struct be_adapter *adapter = netdev_priv(netdev);
+
+ u32 i;
+
+ for (i = 0; i < BE_NUM_VLANS_SUPPORTED; i++) {
+ if (adapter->vlan_tag[i] == cpu_to_le16(vlan_id))
+ break;
+ }
+
+ if (i == BE_NUM_VLANS_SUPPORTED)
+ return;
+
+ /* Now compact the vlan tag array by removing hole created. */
+ while ((i + 1) < BE_NUM_VLANS_SUPPORTED) {
+ adapter->vlan_tag[i] = adapter->vlan_tag[i + 1];
+ i++;
+ }
+
+ if ((i + 1) == BE_NUM_VLANS_SUPPORTED)
+ adapter->vlan_tag[i] = (u16) 0x0;
+ adapter->num_vlans--;
+
+ be_cmd_vlan_config(&adapter->ctrl, adapter->if_handle,
+ adapter->vlan_tag, adapter->num_vlans, 1, 0);
+}
+
+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, vlan_tag;
+ 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) {
+ dev_info(&adapter->netdev->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;
+ }
+ vlan_tag = AMAP_GET_BITS(struct amap_eth_rx_compl,
+ vlan_tag, rxcp);
+ vlan_tag = be16_to_cpu(vlan_tag);
+ vlan_hwaccel_receive_skb(skb, adapter->vlan_grp, vlan_tag);
+ } 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;
+
+ 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 {
+ u16 vlan_tag =
+ AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp);
+ vlan_tag = be16_to_cpu(vlan_tag);
+
+ 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,
+ vlan_tag, NULL, 0);
+ }
+
+ be_rx_rate_update(adapter, pkt_size, num_rcvd);
+ return;
+}
+
+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:
+ be_cmd_q_destroy(&adapter->ctrl, eq, QTYPE_EQ);
+rx_eq_free:
+ be_queue_free(adapter, eq);
+ return rc;
+}
+static bool event_get(struct be_eq_obj *eq_obj, u16 *rid)
+{
+ struct be_eq_entry *entry = queue_tail_node(&eq_obj->q);
+ u32 evt = entry->evt;
+
+ if (!evt)
+ return false;
+
+ evt = le32_to_cpu(evt);
+ *rid = (evt >> EQ_ENTRY_RES_ID_SHIFT) & EQ_ENTRY_RES_ID_MASK;
+ entry->evt = 0;
+ queue_tail_inc(&eq_obj->q);
+ return true;
+}
+
+static int event_handle(struct be_ctrl_info *ctrl,
+ struct be_eq_obj *eq_obj)
+{
+ u16 rid = 0, num = 0;
+
+ while (event_get(eq_obj, &rid))
+ num++;
+
+ /* We can see an interrupt and no event */
+ be_eq_notify(ctrl, eq_obj->q.id, true, true, num);
+ if (num)
+ napi_schedule(&eq_obj->napi);
+
+ return num;
+}
+
+irqreturn_t be_intx(int irq, void *dev)
+{
+ struct be_adapter *adapter = dev;
+ struct be_ctrl_info *ctrl = &adapter->ctrl;
+ int rx, tx;
+
+ tx = event_handle(ctrl, &adapter->tx_eq);
+ rx = event_handle(ctrl, &adapter->rx_eq);
+
+ if (rx || tx)
+ return IRQ_HANDLED;
+ else
+ return IRQ_NONE;
+}
+
+irqreturn_t be_msix_rx(int irq, void *dev)
+{
+ struct be_adapter *adapter = dev;
+
+ event_handle(&adapter->ctrl, &adapter->rx_eq);
+
+ return IRQ_HANDLED;
+}
+
+irqreturn_t be_msix_tx(int irq, void *dev)
+{
+ struct be_adapter *adapter = dev;
+
+ event_handle(&adapter->ctrl, &adapter->tx_eq);
+
+ return IRQ_HANDLED;
+}
+
+static inline bool do_lro(struct be_adapter *adapter,
+ struct be_eth_rx_compl *rxcp)
+{
+ int err = AMAP_GET_BITS(struct amap_eth_rx_compl, err, rxcp);
+ int tcp_frame = AMAP_GET_BITS(struct amap_eth_rx_compl, tcpf, rxcp);
+
+ if (err)
+ drvr_stats(adapter)->be_rxcp_err++;
+
+ return (!tcp_frame || err || (adapter->max_rx_coal <= 1)) ?
+ false : true;
+}
+
+int be_poll_rx(struct napi_struct *napi, int budget)
+{
+ struct be_eq_obj *rx_eq = container_of(napi, struct be_eq_obj, napi);
+ struct be_adapter *adapter =
+ container_of(rx_eq, struct be_adapter, rx_eq);
+ struct be_queue_info *rx_cq = &adapter->rx_obj.cq;
+ struct be_eth_rx_compl *rxcp;
+ u32 work_done;
+
+ for (work_done = 0; work_done < budget; work_done++) {
+ rxcp = be_rx_compl_get(adapter);
+ if (!rxcp)
+ break;
+
+ if (do_lro(adapter, rxcp))
+ be_rx_compl_process_lro(adapter, rxcp);
+ else
+ be_rx_compl_process(adapter, rxcp);
+ }
+
+ lro_flush_all(&adapter->rx_obj.lro_mgr);
+
+ /* Refill the queue */
+ if (atomic_read(&adapter->rx_obj.q.used) < RX_FRAGS_REFILL_WM)
+ be_post_rx_frags(adapter);
+
+ /* All consumed */
+ if (work_done < budget) {
+ napi_complete(napi);
+ be_cq_notify(&adapter->ctrl, rx_cq->id, true, work_done);
+ } else {
+ /* More to be consumed; continue with interrupts disabled */
+ be_cq_notify(&adapter->ctrl, rx_cq->id, false, work_done);
+ }
+ return work_done;
+}
+
+/* For TX we don't honour budget; consume everything */
+int be_poll_tx(struct napi_struct *napi, int budget)
+{
+ struct be_eq_obj *tx_eq = container_of(napi, struct be_eq_obj, napi);
+ struct be_adapter *adapter =
+ container_of(tx_eq, struct be_adapter, tx_eq);
+ struct be_tx_obj *tx_obj = &adapter->tx_obj;
+ struct be_queue_info *tx_cq = &tx_obj->cq;
+ struct be_queue_info *txq = &tx_obj->q;
+ struct be_eth_tx_compl *txcp;
+ u32 num_cmpl = 0;
+ u16 end_idx;
+
+ while ((txcp = be_tx_compl_get(adapter))) {
+ end_idx = AMAP_GET_BITS(struct amap_eth_tx_compl,
+ wrb_index, txcp);
+ be_tx_compl_process(adapter, end_idx);
+ num_cmpl++;
+ }
+
+ /* As Tx wrbs have been freed up, wake up netdev queue if
+ * it was stopped due to lack of tx wrbs.
+ */
+ if (netif_queue_stopped(adapter->netdev) &&
+ atomic_read(&txq->used) < txq->len / 2) {
+ netif_wake_queue(adapter->netdev);
+ }
+
+ napi_complete(napi);
+
+ be_cq_notify(&adapter->ctrl, tx_cq->id, true, num_cmpl);
+
+ drvr_stats(adapter)->be_tx_events++;
+ drvr_stats(adapter)->be_tx_compl += num_cmpl;
+
+ return 1;
+}
+
+static void be_msix_enable(struct be_adapter *adapter)
+{
+ int i, status;
+
+ for (i = 0; i < BE_NUM_MSIX_VECTORS; i++)
+ adapter->msix_entries[i].entry = i;
+
+ status = pci_enable_msix(adapter->pdev, adapter->msix_entries,
+ BE_NUM_MSIX_VECTORS);
+ if (status == 0)
+ adapter->msix_enabled = true;
+ return;
+}
+
+static inline int be_msix_vec_get(struct be_adapter *adapter, u32 eq_id)
+{
+ return adapter->msix_entries[eq_id -
+ 8 * adapter->ctrl.pci_func].vector;
+}
+
+static int be_msix_register(struct be_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ struct be_eq_obj *tx_eq = &adapter->tx_eq;
+ struct be_eq_obj *rx_eq = &adapter->rx_eq;
+ int status, vec;
+
+ sprintf(tx_eq->desc, "%s-tx", netdev->name);
+ vec = be_msix_vec_get(adapter, tx_eq->q.id);
+ status = request_irq(vec, be_msix_tx, 0, tx_eq->desc, adapter);
+ if (status)
+ goto err;
+
+ sprintf(rx_eq->desc, "%s-rx", netdev->name);
+ vec = be_msix_vec_get(adapter, rx_eq->q.id);
+ status = request_irq(vec, be_msix_rx, 0, rx_eq->desc, adapter);
+ if (status) { /* Free TX IRQ */
+ vec = be_msix_vec_get(adapter, tx_eq->q.id);
+ free_irq(vec, adapter);
+ goto err;
+ }
+ return 0;
+err:
+ dev_warn(&netdev->dev, "MSIX Request IRQ failed - err %d\n", status);
+ pci_disable_msix(adapter->pdev);
+ adapter->msix_enabled = false;
+ return status;
+}
+
+static int be_irq_register(struct be_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ int status;
+
+ if (adapter->msix_enabled) {
+ status = be_msix_register(adapter);
+ if (status == 0)
+ goto done;
+ }
+
+ /* INTx */
+ netdev->irq = adapter->pdev->irq;
+ status = request_irq(netdev->irq, be_intx, IRQF_SHARED, netdev->name,
+ adapter);
+ if (status) {
+ dev_warn(&netdev->dev,
+ "INTx request IRQ failed - err %d\n", status);
+ return status;
+ }
+done:
+ adapter->isr_registered = true;
+ return 0;
+}
+
+static void be_irq_unregister(struct be_adapter *adapter)
+{
+ struct net_device *netdev = adapter->netdev;
+ int vec;
+
+ if (!adapter->isr_registered)
+ return;
+
+ /* INTx */
+ if (!adapter->msix_enabled) {
+ free_irq(netdev->irq, adapter);
+ goto done;
+ }
+
+ /* MSIx */
+ vec = be_msix_vec_get(adapter, adapter->tx_eq.q.id);
+ free_irq(vec, adapter);
+ vec = be_msix_vec_get(adapter, adapter->rx_eq.q.id);
+ free_irq(vec, adapter);
+done:
+ adapter->isr_registered = false;
+ return;
+}
+
+static int be_open(struct net_device *netdev)
+{
+ struct be_adapter *adapter = netdev_priv(netdev);
+ struct be_ctrl_info *ctrl = &adapter->ctrl;
+ struct be_eq_obj *rx_eq = &adapter->rx_eq;
+ struct be_eq_obj *tx_eq = &adapter->tx_eq;
+ u32 if_flags;
+ int status;
+
+ if_flags = BE_IF_FLAGS_BROADCAST | BE_IF_FLAGS_PROMISCUOUS |
+ BE_IF_FLAGS_MCAST_PROMISCUOUS | BE_IF_FLAGS_UNTAGGED |
+ BE_IF_FLAGS_PASS_L3L4_ERRORS;
+ status = be_cmd_if_create(ctrl, if_flags, netdev->dev_addr,
+ false/* pmac_invalid */, &adapter->if_handle,
+ &adapter->pmac_id);
+ if (status != 0)
+ goto do_none;
+
+ status = be_cmd_set_flow_control(ctrl, true, true);
+ if (status != 0)
+ goto if_destroy;
+
+ status = be_tx_queues_create(adapter);
+ if (status != 0)
+ goto if_destroy;
+
+ status = be_rx_queues_create(adapter);
+ if (status != 0)
+ goto tx_qs_destroy;
+
+ /* First time posting */
+ be_post_rx_frags(adapter);
+
+ napi_enable(&rx_eq->napi);
+ napi_enable(&tx_eq->napi);
+
+ be_irq_register(adapter);
+
+ be_intr_set(ctrl, true);
+
+ /* The evt queues are created in the unarmed state; arm them */
+ be_eq_notify(ctrl, rx_eq->q.id, true, false, 0);
+ be_eq_notify(ctrl, tx_eq->q.id, true, false, 0);
+
+ /* The compl queues are created in the unarmed state; arm them */
+ be_cq_notify(ctrl, adapter->rx_obj.cq.id, true, 0);
+ be_cq_notify(ctrl, adapter->tx_obj.cq.id, true, 0);
+
+ be_link_status_update(adapter);
+
+ schedule_delayed_work(&adapter->work, msecs_to_jiffies(100));
+ return 0;
+
+tx_qs_destroy:
+ be_tx_queues_destroy(adapter);
+if_destroy:
+ be_cmd_if_destroy(ctrl, adapter->if_handle);
+do_none:
+ return status;
+}
+
+static int be_close(struct net_device *netdev)
+{
+ struct be_adapter *adapter = netdev_priv(netdev);
+ struct be_ctrl_info *ctrl = &adapter->ctrl;
+ struct be_eq_obj *rx_eq = &adapter->rx_eq;
+ struct be_eq_obj *tx_eq = &adapter->tx_eq;
+ int vec;
+
+ cancel_delayed_work(&adapter->work);
+
+ netif_stop_queue(netdev);
+ netif_carrier_off(netdev);
+ adapter->link.speed = PHY_LINK_SPEED_ZERO;
+
+ be_intr_set(ctrl, false);
+
+ if (adapter->msix_enabled) {
+ vec = be_msix_vec_get(adapter, tx_eq->q.id);
+ synchronize_irq(vec);
+ vec = be_msix_vec_get(adapter, rx_eq->q.id);
+ synchronize_irq(vec);
+ } else {
+ synchronize_irq(netdev->irq);
+ }
+ be_irq_unregister(adapter);
+
+ napi_disable(&rx_eq->napi);
+ napi_disable(&tx_eq->napi);
+
+ be_rx_queues_destroy(adapter);
+ be_tx_queues_destroy(adapter);
+
+ be_cmd_if_destroy(ctrl, adapter->if_handle);
+ return 0;
+}
+
+static int be_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
+ void **ip_hdr, void **tcpudp_hdr,
+ u64 *hdr_flags, void *priv)
+{
+ struct ethhdr *eh;
+ struct vlan_ethhdr *veh;
+ struct iphdr *iph;
+ u8 *va = page_address(frag->page) + frag->page_offset;
+ unsigned long ll_hlen;
+
+ prefetch(va);
+ eh = (struct ethhdr *)va;
+ *mac_hdr = eh;
+ ll_hlen = ETH_HLEN;
+ if (eh->h_proto != htons(ETH_P_IP)) {
+ if (eh->h_proto == htons(ETH_P_8021Q)) {
+ veh = (struct vlan_ethhdr *)va;
+ if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
+ return -1;
+
+ ll_hlen += VLAN_HLEN;
+ } else {
+ return -1;
+ }
+ }
+ *hdr_flags = LRO_IPV4;
+ iph = (struct iphdr *)(va + ll_hlen);
+ *ip_hdr = iph;
+ if (iph->protocol != IPPROTO_TCP)
+ return -1;
+ *hdr_flags |= LRO_TCP;
+ *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
+
+ return 0;
+}
+
+static void be_lro_init(struct be_adapter *adapter, struct net_device *netdev)
+{
+ struct net_lro_mgr *lro_mgr;
+
+ lro_mgr = &adapter->rx_obj.lro_mgr;
+ lro_mgr->dev = netdev;
+ lro_mgr->features = LRO_F_NAPI;
+ lro_mgr->ip_summed = CHECKSUM_UNNECESSARY;
+ lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
+ lro_mgr->max_desc = BE_MAX_LRO_DESCRIPTORS;
+ lro_mgr->lro_arr = adapter->rx_obj.lro_desc;
+ lro_mgr->get_frag_header = be_get_frag_header;
+ lro_mgr->max_aggr = BE_MAX_FRAGS_PER_FRAME;
+}
+
+static struct net_device_ops be_netdev_ops = {
+ .ndo_open = be_open,
+ .ndo_stop = be_close,
+ .ndo_start_xmit = be_xmit,
+ .ndo_get_stats = be_get_stats,
+ .ndo_set_rx_mode = be_set_multicast_list,
+ .ndo_set_mac_address = be_mac_addr_set,
+ .ndo_change_mtu = be_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_vlan_rx_register = be_vlan_register,
+ .ndo_vlan_rx_add_vid = be_vlan_add_vid,
+ .ndo_vlan_rx_kill_vid = be_vlan_rem_vid,
+};
+
+static void be_netdev_init(struct net_device *netdev)
+{
+ struct be_adapter *adapter = netdev_priv(netdev);
+
+ netdev->features |= NETIF_F_SG | NETIF_F_HW_VLAN_RX | NETIF_F_TSO |
+ NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_FILTER | NETIF_F_IP_CSUM |
+ NETIF_F_IPV6_CSUM | NETIF_F_TSO6;
+
+ netdev->flags |= IFF_MULTICAST;
+
+ BE_SET_NETDEV_OPS(netdev, &be_netdev_ops);
+
+ SET_ETHTOOL_OPS(netdev, &be_ethtool_ops);
+
+ be_lro_init(adapter, netdev);
+
+ netif_napi_add(netdev, &adapter->rx_eq.napi, be_poll_rx, 64);
+ netif_napi_add(netdev, &adapter->tx_eq.napi, be_poll_tx, 64);
+
+ netif_carrier_off(netdev);
+ netif_stop_queue(netdev);
+}
+
+static void be_unmap_pci_bars(struct be_adapter *adapter)
+{
+ struct be_ctrl_info *ctrl = &adapter->ctrl;
+ if (ctrl->csr)
+ iounmap(ctrl->csr);
+ if (ctrl->db)
+ iounmap(ctrl->db);
+ if (ctrl->pcicfg)
+ iounmap(ctrl->pcicfg);
+}
+
+static int be_map_pci_bars(struct be_adapter *adapter)
+{
+ u8 __iomem *addr;
+
+ addr = ioremap_nocache(pci_resource_start(adapter->pdev, 2),
+ pci_resource_len(adapter->pdev, 2));
+ if (addr == NULL)
+ return -ENOMEM;
+ adapter->ctrl.csr = addr;
+
+ addr = ioremap_nocache(pci_resource_start(adapter->pdev, 4),
+ 128 * 1024);
+ if (addr == NULL)
+ goto pci_map_err;
+ adapter->ctrl.db = addr;
+
+ addr = ioremap_nocache(pci_resource_start(adapter->pdev, 1),
+ pci_resource_len(adapter->pdev, 1));
+ if (addr == NULL)
+ goto pci_map_err;
+ adapter->ctrl.pcicfg = addr;
+
+ return 0;
+pci_map_err:
+ be_unmap_pci_bars(adapter);
+ return -ENOMEM;
+}
+
+
+static void be_ctrl_cleanup(struct be_adapter *adapter)
+{
+ struct be_dma_mem *mem = &adapter->ctrl.mbox_mem_alloced;
+
+ be_unmap_pci_bars(adapter);
+
+ if (mem->va)
+ pci_free_consistent(adapter->pdev, mem->size,
+ mem->va, mem->dma);
+}
+
+/* Initialize the mbox required to send cmds to BE */
+static int be_ctrl_init(struct be_adapter *adapter)
+{
+ struct be_ctrl_info *ctrl = &adapter->ctrl;
+ struct be_dma_mem *mbox_mem_alloc = &ctrl->mbox_mem_alloced;
+ struct be_dma_mem *mbox_mem_align = &ctrl->mbox_mem;
+ int status;
+ u32 val;
+
+ status = be_map_pci_bars(adapter);
+ if (status)
+ return status;
+
+ mbox_mem_alloc->size = sizeof(struct be_mcc_mailbox) + 16;
+ mbox_mem_alloc->va = pci_alloc_consistent(adapter->pdev,
+ mbox_mem_alloc->size, &mbox_mem_alloc->dma);
+ if (!mbox_mem_alloc->va) {
+ be_unmap_pci_bars(adapter);
+ return -1;
+ }
+ mbox_mem_align->size = sizeof(struct be_mcc_mailbox);
+ mbox_mem_align->va = PTR_ALIGN(mbox_mem_alloc->va, 16);
+ mbox_mem_align->dma = PTR_ALIGN(mbox_mem_alloc->dma, 16);
+ memset(mbox_mem_align->va, 0, sizeof(struct be_mcc_mailbox));
+ spin_lock_init(&ctrl->cmd_lock);
+
+ val = ioread32(ctrl->pcicfg + PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET);
+ ctrl->pci_func = (val >> MEMBAR_CTRL_INT_CTRL_PFUNC_SHIFT) &
+ MEMBAR_CTRL_INT_CTRL_PFUNC_MASK;
+ return 0;
+}
+
+static void be_stats_cleanup(struct be_adapter *adapter)
+{
+ struct be_stats_obj *stats = &adapter->stats;
+ struct be_dma_mem *cmd = &stats->cmd;
+
+ if (cmd->va)
+ pci_free_consistent(adapter->pdev, cmd->size,
+ cmd->va, cmd->dma);
+}
+
+static int be_stats_init(struct be_adapter *adapter)
+{
+ struct be_stats_obj *stats = &adapter->stats;
+ struct be_dma_mem *cmd = &stats->cmd;
+
+ cmd->size = sizeof(struct be_cmd_req_get_stats);
+ cmd->va = pci_alloc_consistent(adapter->pdev, cmd->size, &cmd->dma);
+ if (cmd->va == NULL)
+ return -1;
+ return 0;
+}
+
+static void __devexit be_remove(struct pci_dev *pdev)
+{
+ struct be_adapter *adapter = pci_get_drvdata(pdev);
+ if (!adapter)
+ return;
+
+ unregister_netdev(adapter->netdev);
+
+ be_stats_cleanup(adapter);
+
+ be_ctrl_cleanup(adapter);
+
+ if (adapter->msix_enabled) {
+ pci_disable_msix(adapter->pdev);
+ adapter->msix_enabled = false;
+ }
+
+ pci_set_drvdata(pdev, NULL);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+
+ free_netdev(adapter->netdev);
+}
+
+static int be_hw_up(struct be_adapter *adapter)
+{
+ struct be_ctrl_info *ctrl = &adapter->ctrl;
+ int status;
+
+ status = be_cmd_POST(ctrl);
+ if (status)
+ return status;
+
+ status = be_cmd_get_fw_ver(ctrl, adapter->fw_ver);
+ if (status)
+ return status;
+
+ status = be_cmd_query_fw_cfg(ctrl, &adapter->port_num);
+ return status;
+}
+
+static int __devinit be_probe(struct pci_dev *pdev,
+ const struct pci_device_id *pdev_id)
+{
+ int status = 0;
+ struct be_adapter *adapter;
+ struct net_device *netdev;
+ struct be_ctrl_info *ctrl;
+ u8 mac[ETH_ALEN];
+
+ status = pci_enable_device(pdev);
+ if (status)
+ goto do_none;
+
+ status = pci_request_regions(pdev, DRV_NAME);
+ if (status)
+ goto disable_dev;
+ pci_set_master(pdev);
+
+ netdev = alloc_etherdev(sizeof(struct be_adapter));
+ if (netdev == NULL) {
+ status = -ENOMEM;
+ goto rel_reg;
+ }
+ adapter = netdev_priv(netdev);
+ adapter->pdev = pdev;
+ pci_set_drvdata(pdev, adapter);
+ adapter->netdev = netdev;
+
+ be_msix_enable(adapter);
+
+ status = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
+ if (!status) {
+ netdev->features |= NETIF_F_HIGHDMA;
+ } else {
+ status = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+ if (status) {
+ dev_err(&netdev->dev, "Could not set PCI DMA Mask\n");
+ goto free_netdev;
+ }
+ }
+
+ ctrl = &adapter->ctrl;
+ status = be_ctrl_init(adapter);
+ if (status)
+ goto free_netdev;
+
+ status = be_stats_init(adapter);
+ if (status)
+ goto ctrl_clean;
+
+ status = be_hw_up(adapter);
+ if (status)
+ goto stats_clean;
+
+ status = be_cmd_mac_addr_query(ctrl, mac, MAC_ADDRESS_TYPE_NETWORK,
+ true /* permanent */, 0);
+ if (status)
+ goto stats_clean;
+ memcpy(netdev->dev_addr, mac, ETH_ALEN);
+
+ INIT_DELAYED_WORK(&adapter->work, be_worker);
+ be_netdev_init(netdev);
+ SET_NETDEV_DEV(netdev, &adapter->pdev->dev);
+
+ status = register_netdev(netdev);
+ if (status != 0)
+ goto stats_clean;
+
+ return 0;
+
+stats_clean:
+ be_stats_cleanup(adapter);
+ctrl_clean:
+ be_ctrl_cleanup(adapter);
+free_netdev:
+ free_netdev(adapter->netdev);
+rel_reg:
+ pci_release_regions(pdev);
+disable_dev:
+ pci_disable_device(pdev);
+do_none:
+ return status;
+}
+
+static int be_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct be_adapter *adapter = pci_get_drvdata(pdev);
+ struct net_device *netdev = adapter->netdev;
+
+ netif_device_detach(netdev);
+ if (netif_running(netdev)) {
+ rtnl_lock();
+ be_close(netdev);
+ rtnl_unlock();
+ }
+
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ return 0;
+}
+
+static int be_resume(struct pci_dev *pdev)
+{
+ int status = 0;
+ struct be_adapter *adapter = pci_get_drvdata(pdev);
+ struct net_device *netdev = adapter->netdev;
+
+ netif_device_detach(netdev);
+
+ status = pci_enable_device(pdev);
+ if (status)
+ return status;
+
+ pci_set_power_state(pdev, 0);
+ pci_restore_state(pdev);
+
+ if (netif_running(netdev)) {
+ rtnl_lock();
+ be_open(netdev);
+ rtnl_unlock();
+ }
+ netif_device_attach(netdev);
+ return 0;
+}
+
+static struct pci_driver be_driver = {
+ .name = DRV_NAME,
+ .id_table = be_dev_ids,
+ .probe = be_probe,
+ .remove = be_remove,
+ .suspend = be_suspend,
+ .resume = be_resume
+};
+
+static int __init be_init_module(void)
+{
+ if (rx_frag_size != 8192 && rx_frag_size != 4096
+ && rx_frag_size != 2048) {
+ printk(KERN_WARNING DRV_NAME
+ " : Rx frag size be 2048/4096/8192. Using 2048bytes\n");
+ rx_frag_size = 2048;
+ }
+ /* Ensure rx_frag_size is aligned to chache line */
+ if (SKB_DATA_ALIGN(rx_frag_size) != rx_frag_size) {
+ printk(KERN_WARNING DRV_NAME
+ " : Bad receive frag size. Using 2048bytes\n");
+ rx_frag_size = 2048;
+ }
+
+ return pci_register_driver(&be_driver);
+}
+module_init(be_init_module);
+
+static void __exit be_exit_module(void)
+{
+ pci_unregister_driver(&be_driver);
+}
+module_exit(be_exit_module);
Signed-off-by: Sathya Perla <sathyap@serverengines.com> --- drivers/net/benet/be_main.c | 1885 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 1885 insertions(+), 0 deletions(-) create mode 100644 drivers/net/benet/be_main.c