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Message-ID: <20080515090613.03bf6fa6@mailhost.serverengines.com>
Date: Thu, 15 May 2008 02:06:13 -0700
From: "Subbu Seetharaman" <subbus@...verengines.com>
To: netdev@...r.kernel.org
Subject: [PATCH 2/15] BE NIC driver - interrupt, ethtool, stack i/f functions
Signed-off-by: Subbu Seetharaman <subbus@...verengines.com>
---
drivers/net/benet/be_ethtool.c | 381 +++++++++++++++++
drivers/net/benet/be_int.c | 893 ++++++++++++++++++++++++++++++++++++++++
drivers/net/benet/be_netif.c | 721 ++++++++++++++++++++++++++++++++
3 files changed, 1995 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/benet/be_ethtool.c
create mode 100644 drivers/net/benet/be_int.c
create mode 100644 drivers/net/benet/be_netif.c
diff --git a/drivers/net/benet/be_ethtool.c b/drivers/net/benet/be_ethtool.c
new file mode 100644
index 0000000..721d392
--- /dev/null
+++ b/drivers/net/benet/be_ethtool.c
@@ -0,0 +1,381 @@
+/*
+ * Copyright (C) 2005 - 2008 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
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or at your option any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, 5th Floor
+ * Boston, MA 02110-1301 USA
+ *
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called GPL.
+ *
+ * Contact Information:
+ * linux-drivers@...verengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ *
+ */
+/*
+ * be_ethtool.c
+ *
+ * This file contains various functions that ethtool can use
+ * to talk to the driver and the BE H/W.
+ */
+
+#include <linux/pci.h>
+#include "be.h"
+
+#include <linux/ethtool.h>
+
+static const char benet_gstrings_stats[][ETH_GSTRING_LEN] = {
+/*net_device_stats */
+ "irq",
+ "rx_packets",
+ "tx_packets",
+ "rx_bytes",
+ "tx_bytes",
+ "rx_errors",
+ "tx_errors",
+ "rx_dropped",
+ "tx_dropped",
+ "multicast",
+ "collisions",
+ "rx_length_errors",
+ "rx_over_errors",
+ "rx_crc_errors",
+ "rx_frame_errors",
+ "rx_fifo_errors",
+ "rx_missed_errors",
+ "tx_aborted_errors",
+ "tx_carrier_errors",
+ "tx_fifo_errors",
+ "tx_heartbeat_errors",
+ "tx_window_errors",
+ "rx_compressed",
+ "tc_compressed",
+/*BE driver Stats */
+ "bes_tx_reqs",
+ "bes_tx_fails",
+ "bes_fwd_reqs",
+ "bes_tx_wrbs",
+ "bes_interrupts",
+ "bes_events",
+ "bes_tx_events",
+ "bes_ucrx_events",
+ "bes_bcrx_events",
+ "bes_tx_compl",
+ "bes_ucrx_compl",
+ "bes_bcrx_compl",
+ "bes_ethrx_post_fail",
+ "bes_802_3_dropped_frames",
+ "bes_802_3_malformed_frames",
+ "bes_rx_misc_pkts",
+ "bes_eth_tx_rate",
+ "bes_eth_rx_rate",
+ "Num Packets collected",
+ "Num Times Flushed",
+};
+
+#define NET_DEV_STATS_LEN \
+ (sizeof(struct net_device_stats)/sizeof(unsigned long))
+#define BENET_STATS_LEN sizeof(benet_gstrings_stats) / ETH_GSTRING_LEN
+
+static void
+be_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *drvinfo)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+
+ strncpy(drvinfo->driver, be_driver_name, 32);
+ strncpy(drvinfo->version, be_drvr_ver, 32);
+ strncpy(drvinfo->fw_version, be_fw_ver, 32);
+ strcpy(drvinfo->bus_info, pci_name(adapter->pdev));
+ drvinfo->testinfo_len = 0;
+ drvinfo->regdump_len = 0;
+ drvinfo->eedump_len = 0;
+}
+
+static int
+be_get_coalesce(struct net_device *netdev,
+ struct ethtool_coalesce *coalesce)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+
+ coalesce->rx_max_coalesced_frames = adapter->max_rx_coal;
+
+ coalesce->rx_coalesce_usecs = adapter->cur_eqd;
+ coalesce->rx_coalesce_usecs_high = adapter->max_eqd;
+ coalesce->rx_coalesce_usecs_low = adapter->min_eqd;
+
+ coalesce->tx_coalesce_usecs = adapter->cur_eqd;
+ coalesce->tx_coalesce_usecs_high = adapter->max_eqd;
+ coalesce->tx_coalesce_usecs_low = adapter->min_eqd;
+
+ coalesce->use_adaptive_rx_coalesce = adapter->enable_aic;
+ coalesce->use_adaptive_tx_coalesce = adapter->enable_aic;
+
+ return 0;
+}
+
+static int
+be_set_coalesce(struct net_device *netdev,
+ struct ethtool_coalesce *coalesce)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ u32 max, min, cur;
+
+ adapter->max_rx_coal = coalesce->rx_max_coalesced_frames;
+ if (adapter->max_rx_coal < 0)
+ adapter->max_rx_coal = 0;
+ if (adapter->max_rx_coal >= BE_LRO_MAX_PKTS)
+ adapter->max_rx_coal = BE_LRO_MAX_PKTS;
+
+ if (adapter->enable_aic == 0 &&
+ coalesce->use_adaptive_rx_coalesce == 1) {
+ /* if AIC is being turned on now, start with an EQD of 0 */
+ adapter->cur_eqd = 0;
+ }
+ adapter->enable_aic = coalesce->use_adaptive_rx_coalesce;
+
+ /* round off to nearest multiple of 8 */
+ max = (((coalesce->rx_coalesce_usecs_high + 4) >> 3) << 3);
+ min = (((coalesce->rx_coalesce_usecs_low + 4) >> 3) << 3);
+ cur = (((coalesce->rx_coalesce_usecs + 4) >> 3) << 3);
+
+ if (adapter->enable_aic) {
+ /* accept low and high if AIC is enabled */
+ if (max > MAX_EQD)
+ min = MAX_EQD;
+ if (min > max)
+ min = max;
+ adapter->max_eqd = max;
+ adapter->min_eqd = min;
+ if (adapter->cur_eqd > max)
+ adapter->cur_eqd = max;
+ if (adapter->cur_eqd < min)
+ adapter->cur_eqd = min;
+ } else {
+ /* accept specified coalesce_usecs only if AIC is disabled */
+ if (cur > MAX_EQD)
+ cur = MAX_EQD;
+ if (bni_change_eqd(pnob, cur) == BE_SUCCESS)
+ adapter->cur_eqd = cur;
+ }
+
+ return 0;
+}
+
+static u32 be_get_rx_csum(struct net_device *netdev)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ return adapter->rx_csum;
+}
+
+static int be_set_rx_csum(struct net_device *netdev, uint32_t data)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ if (data)
+ adapter->rx_csum = 1;
+ else
+ adapter->rx_csum = 0;
+
+ return 0;
+}
+
+static void
+be_get_strings(struct net_device *netdev, uint32_t stringset,
+ uint8_t *data)
+{
+
+ switch (stringset) {
+ case ETH_SS_STATS:
+ memcpy(data, *benet_gstrings_stats,
+ sizeof(benet_gstrings_stats));
+ break;
+ }
+}
+
+static int be_get_stats_count(struct net_device *netdev)
+{
+ return BENET_STATS_LEN;
+}
+
+static void
+be_get_ethtool_stats(struct net_device *netdev,
+ struct ethtool_stats *stats, uint64_t *data)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ int i;
+
+ data[0] = adapter->pdev->irq;
+
+ benet_get_stats(netdev);
+
+ for (i = 1; i <= NET_DEV_STATS_LEN; i++)
+ data[i] = ((unsigned long *)&adapter->benet_stats)[i - 1];
+
+ data[i++] = adapter->be_stat.bes_tx_reqs;
+ data[i++] = adapter->be_stat.bes_tx_fails;
+ data[i++] = adapter->be_stat.bes_fwd_reqs;
+ data[i++] = adapter->be_stat.bes_tx_wrbs;
+
+ data[i++] = adapter->be_stat.bes_ints;
+ data[i++] = adapter->be_stat.bes_events;
+ data[i++] = adapter->be_stat.bes_tx_events;
+ data[i++] = adapter->be_stat.bes_ucrx_events;
+ data[i++] = adapter->be_stat.bes_bcrx_events;
+ data[i++] = adapter->be_stat.bes_tx_compl;
+ data[i++] = adapter->be_stat.bes_ucrx_compl;
+ data[i++] = adapter->be_stat.bes_bcrx_compl;
+ data[i++] = adapter->be_stat.bes_ethrx_post_fail;
+ data[i++] = adapter->be_stat.bes_802_3_dropped_frames;
+ data[i++] = adapter->be_stat.bes_802_3_malformed_frames;
+ data[i++] = adapter->be_stat.bes_rx_misc_pkts;
+ data[i++] = adapter->be_stat.bes_eth_tx_rate;
+ data[i++] = adapter->be_stat.bes_eth_rx_rate;
+ data[i++] = adapter->be_stat.bes_rx_coal;
+ data[i++] = adapter->be_stat.bes_rx_flush;
+
+}
+
+static int
+be_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
+{
+ struct bni_net_object *pnob = netdev->priv;
+
+ ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
+ ecmd->advertising = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
+ ecmd->port = PORT_FIBRE;
+ ecmd->transceiver = XCVR_EXTERNAL;
+
+ if (netif_carrier_ok(OSM_NOB(pnob)->os_handle)) {
+ ecmd->speed = SPEED_10000;
+ ecmd->duplex = DUPLEX_FULL;
+ } else {
+ ecmd->speed = -1;
+ ecmd->duplex = -1;
+ }
+
+ ecmd->autoneg = AUTONEG_DISABLE;
+ return 0;
+}
+
+/*Get the Ring parameters from the pnob */
+static void
+be_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring)
+{
+ struct bni_net_object *pnob = netdev->priv;
+
+ /*Pre Set Maxims */
+ ring->rx_max_pending = pnob->rx_q_len;
+ ring->rx_mini_max_pending = ring->rx_mini_max_pending;
+ ring->rx_jumbo_max_pending = ring->rx_jumbo_max_pending;
+ ring->tx_max_pending = pnob->tx_q_len;
+
+ /*Current hardware Settings */
+ ring->rx_pending = pnob->rx_q_posted;
+ ring->rx_mini_pending = ring->rx_mini_pending;
+ ring->rx_jumbo_pending = ring->rx_jumbo_pending;
+ ring->tx_pending = pnob->tx_q_used;
+
+}
+
+static void
+be_get_pauseparam(struct net_device *netdev,
+ struct ethtool_pauseparam *ecmd)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ bool rxfc = FALSE;
+ bool txfc = FALSE;
+ BESTATUS status;
+ if (ecmd->cmd != ETHTOOL_GPAUSEPARAM)
+ return;
+
+ status = bni_get_flow_ctl(&pnob->fn_obj, &txfc, &rxfc);
+ if (status != BE_SUCCESS)
+ printk(KERN_WARNING "Unable to get pause frame settings\n");
+
+ if (txfc == TRUE)
+ ecmd->tx_pause = 1;
+ else
+ ecmd->tx_pause = 0;
+
+ if (rxfc == TRUE)
+ ecmd->rx_pause = 1;
+ else
+ ecmd->rx_pause = 0;
+
+ /* Always setting autoneg to TRUE */
+ ecmd->autoneg = 1;
+
+ return;
+}
+
+static int
+be_set_pauseparam(struct net_device *netdev,
+ struct ethtool_pauseparam *ecmd)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ bool txfc = FALSE;
+ bool rxfc = FALSE;
+ BESTATUS status;
+
+ if (ecmd->cmd != ETHTOOL_SPAUSEPARAM)
+ return -EINVAL;
+
+ if (ecmd->tx_pause)
+ txfc = TRUE;
+ else
+ txfc = FALSE;
+
+ if (ecmd->rx_pause)
+ rxfc = TRUE;
+ else
+ rxfc = FALSE;
+
+ status = bni_set_flow_ctll(&pnob->fn_obj, txfc, rxfc);
+ if (status != BE_SUCCESS)
+ printk(KERN_ERR "Unable to set pause frame settings\n");
+ return 0;
+}
+
+struct ethtool_ops be_ethtool_ops = {
+ .get_settings = be_get_settings,
+ .get_drvinfo = be_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_coalesce = be_get_coalesce,
+ .set_coalesce = be_set_coalesce,
+ .get_ringparam = be_get_ringparam,
+ .get_pauseparam = be_get_pauseparam,
+ .set_pauseparam = be_set_pauseparam,
+ .get_rx_csum = be_get_rx_csum, /*Yes */
+ .set_rx_csum = be_set_rx_csum,
+ .get_tx_csum = ethtool_op_get_tx_csum, /*Yes */
+ .set_tx_csum = ethtool_op_set_tx_csum, /*Yes */
+ .get_sg = ethtool_op_get_sg, /*Yes */
+ .set_sg = ethtool_op_set_sg, /*Yes */
+ .get_tso = ethtool_op_get_tso,
+ .set_tso = ethtool_op_set_tso,
+ .get_strings = be_get_strings,
+ .get_stats_count = be_get_stats_count,
+ .get_ethtool_stats = be_get_ethtool_stats,
+};
diff --git a/drivers/net/benet/be_int.c b/drivers/net/benet/be_int.c
new file mode 100644
index 0000000..4560d61
--- /dev/null
+++ b/drivers/net/benet/be_int.c
@@ -0,0 +1,893 @@
+/*
+ * Copyright (C) 2005 - 2008 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
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or at your option any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, 5th Floor
+ * Boston, MA 02110-1301 USA
+ *
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called GPL.
+ *
+ * Contact Information:
+ * linux-drivers@...verengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/if_vlan.h>
+
+#include <linux/inet_lro.h>
+
+#include "be.h"
+
+/* number of bytes of RX frame that are copied to skb->data */
+#define BE_HDR_LEN 64
+
+#ifdef CONFIG_BENET_NAPI
+#define VLAN_ACCEL_RX(skb, pnob, vt) \
+ vlan_hwaccel_receive_skb(skb, OSM_NOB(pnob)->vlan_grp, vt);
+#else
+#define VLAN_ACCEL_RX(skb, pnob, vt) \
+ vlan_hwaccel_rx(skb, OSM_NOB(pnob)->vlan_grp, vt);
+#endif
+
+#ifdef CONFIG_BENET_NAPI
+#define NETIF_RX(skb) netif_receive_skb(skb);
+#else
+#define NETIF_RX(skb) netif_rx(skb);
+#endif
+
+/*
+ * adds additional receive frags indicated by BE starting from given
+ * frag index (fi) to specified skb's frag list
+ */
+static inline void
+add_skb_frags(struct bni_net_object *pnob, struct sk_buff *skb,
+ int nresid, u32 fi)
+{
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ u32 sk_frag_idx, n;
+ struct be_rx_page_info *rx_page_info;
+ u32 frag_sz = pnob->rx_buf_size;
+
+ sk_frag_idx = skb_shinfo(skb)->nr_frags;
+ while (nresid) {
+ fi = (fi + 1) % pnob->rx_q_len; /* frag index */
+
+ rx_page_info = (struct be_rx_page_info *) pnob->rx_ctxt[fi];
+ pnob->rx_ctxt[fi] = (void *)NULL;
+ if ((rx_page_info->page_offset) ||
+ (OSM_NOB(pnob)->rx_pg_shared == FALSE)) {
+ pci_unmap_page(adapter->pdev,
+ pci_unmap_addr(rx_page_info, bus),
+ frag_sz, PCI_DMA_FROMDEVICE);
+ }
+
+ n = MIN(nresid, frag_sz);
+ skb_shinfo(skb)->frags[sk_frag_idx].page
+ = rx_page_info->page;
+ skb_shinfo(skb)->frags[sk_frag_idx].page_offset
+ = rx_page_info->page_offset;
+ skb_shinfo(skb)->frags[sk_frag_idx].size = n;
+
+ sk_frag_idx++;
+ skb->len += n;
+ skb->data_len += n;
+ skb_shinfo(skb)->nr_frags++;
+ nresid -= n;
+
+ memset(rx_page_info, 0, sizeof(struct be_rx_page_info));
+ sa_atomic_decrement(&pnob->rx_q_posted);
+ }
+}
+
+/*
+ * This function processes incoming nic packets over various Rx queues.
+ * This function takes the adapter, the current Rx status descriptor
+ * entry and the Rx completion queue ID as argument.
+ */
+static inline int process_nic_rx_completion(struct bni_net_object *pnob,
+ struct ETH_RX_COMPL_AMAP *rxcp)
+{
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ struct sk_buff *skb;
+ int udpcksm, tcpcksm;
+ int n, fi;
+ int nresid;
+ unsigned int frag_sz = pnob->rx_buf_size;
+ u8 *va;
+ struct be_rx_page_info *rx_page_info;
+ u32 numfrags, vtp, vtm, vlan_tag, pktsize;
+
+ fi = AMAP_GET_BITS_PTR(ETH_RX_COMPL, fragndx, rxcp);
+ SA_ASSERT(fi < (int)pnob->rx_q_len);
+ SA_ASSERT(fi >= 0);
+
+ rx_page_info = (struct be_rx_page_info *) pnob->rx_ctxt[fi];
+ SA_ASSERT(rx_page_info->page);
+ pnob->rx_ctxt[fi] = (void *)NULL;
+
+ /*
+ * If one page is used per fragment or if this is the second half of
+ * of the page, unmap the page here
+ */
+ if ((rx_page_info->page_offset) ||
+ (OSM_NOB(pnob)->rx_pg_shared == FALSE)) {
+ pci_unmap_page(adapter->pdev,
+ pci_unmap_addr(rx_page_info, bus), frag_sz,
+ PCI_DMA_FROMDEVICE);
+ }
+
+ sa_atomic_decrement(&pnob->rx_q_posted);
+ udpcksm = AMAP_GET_BITS_PTR(ETH_RX_COMPL, udpcksm, rxcp);
+ tcpcksm = AMAP_GET_BITS_PTR(ETH_RX_COMPL, tcpcksm, rxcp);
+ pktsize = AMAP_GET_BITS_PTR(ETH_RX_COMPL, pktsize, rxcp);
+ /*
+ * get rid of RX flush completions first.
+ */
+ if ((tcpcksm) && (udpcksm) && (pktsize == 32)) {
+ put_page(rx_page_info->page);
+ memset(rx_page_info, 0, sizeof(struct be_rx_page_info));
+ return 0;
+ }
+ skb = alloc_skb(BE_HDR_LEN + 16, GFP_ATOMIC);
+ if (skb == NULL) {
+ printk(KERN_WARNING "alloc_skb() failed\n");
+ put_page(rx_page_info->page);
+ memset(rx_page_info, 0, sizeof(struct be_rx_page_info));
+ goto free_frags;
+ }
+ skb_reserve(skb, NET_IP_ALIGN);
+
+ skb->dev = OSM_NOB(pnob)->os_handle;
+
+ n = MIN(pktsize, frag_sz);
+
+ va = page_address(rx_page_info->page) + rx_page_info->page_offset;
+ prefetch(va);
+
+ skb->len = skb->data_len = n;
+ if (n <= BE_HDR_LEN) {
+ memcpy(skb->data, va, n);
+ put_page(rx_page_info->page);
+ skb->data_len -= n;
+ skb->tail += n;
+ } else {
+
+ /* Setup the SKB with page buffer information */
+ skb_shinfo(skb)->frags[0].page = rx_page_info->page;
+ skb_shinfo(skb)->nr_frags++;
+
+ /* Copy the header into the skb_data */
+ memcpy(skb->data, va, BE_HDR_LEN);
+ skb_shinfo(skb)->frags[0].page_offset =
+ rx_page_info->page_offset + BE_HDR_LEN;
+ skb_shinfo(skb)->frags[0].size = n - BE_HDR_LEN;
+ skb->data_len -= BE_HDR_LEN;
+ skb->tail += BE_HDR_LEN;
+ }
+ memset(rx_page_info, 0, sizeof(struct be_rx_page_info));
+ nresid = pktsize - n;
+
+ skb->protocol = eth_type_trans(skb, OSM_NOB(pnob)->os_handle);
+
+ if ((tcpcksm || udpcksm) && adapter->rx_csum)
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ else
+ skb->ip_summed = CHECKSUM_NONE;
+ /*
+ * if we have more bytes left, the frame has been
+ * given to us in multiple fragments. This happens
+ * with Jumbo frames. Add the remaining fragments to
+ * skb->frags[] array.
+ */
+ if (nresid)
+ add_skb_frags(pnob, skb, nresid, fi);
+
+ /* update the the true size of the skb. */
+ skb->truesize = skb->len + sizeof(struct sk_buff);
+
+ /*
+ * If a 802.3 frame or 802.2 LLC frame
+ * (i.e) contains length field in MAC Hdr
+ * and frame len is greater than 64 bytes
+ */
+ if (((skb->protocol == ntohs(ETH_P_802_2)) ||
+ (skb->protocol == ntohs(ETH_P_802_3)))
+ && (pktsize > BE_HDR_LEN)) {
+ /*
+ * If the length given in Mac Hdr is less than frame size
+ * Erraneous frame, Drop it
+ */
+ if ((ntohs(*(u16 *) (va + 12)) + ETH_HLEN) < pktsize) {
+ /* Increment Non Ether type II frames dropped */
+ adapter->be_stat.bes_802_3_dropped_frames++;
+
+ kfree_skb(skb);
+ return 0;
+ }
+ /*
+ * else if the length given in Mac Hdr is greater than
+ * frame size, should not be seeing this sort of frames
+ * dump the pkt and pass to stack
+ */
+ else if ((ntohs(*(u16 *) (va + 12)) + ETH_HLEN) > pktsize) {
+ /* Increment Non Ether type II frames malformed */
+ adapter->be_stat.bes_802_3_malformed_frames++;
+ }
+ }
+
+ vtp = AMAP_GET_BITS_PTR(ETH_RX_COMPL, vtp, rxcp);
+ vtm = AMAP_GET_BITS_PTR(ETH_RX_COMPL, vtm, rxcp);
+ if (vtp && vtm) {
+ /* Vlan tag present in pkt and BE found
+ * that the tag matched an entry in VLAN table
+ */
+ if (!(OSM_NOB(pnob)->vlan_grp) ||
+ OSM_NOB(pnob)->num_vlans == 0) {
+ /* But we have no VLANs configured.
+ * This should never happen. Drop the packet.
+ */
+ printk(KERN_ERR
+ "BladeEngine: Unexpected vlan tagged packet\n");
+ kfree_skb(skb);
+ return 0;
+ }
+ /* pass the VLAN packet to stack */
+ vlan_tag = AMAP_GET_BITS_PTR(ETH_RX_COMPL, vlan_tag, rxcp);
+ VLAN_ACCEL_RX(skb, pnob, be16_to_cpu(vlan_tag));
+
+ } else {
+ NETIF_RX(skb);
+ }
+
+ return 0;
+free_frags:
+ /* free all frags associated with the current rxcp */
+ numfrags = AMAP_GET_BITS_PTR(ETH_RX_COMPL, numfrags, rxcp);
+ while (numfrags-- > 1) {
+ fi = (fi + 1) % pnob->rx_q_len;
+
+ rx_page_info = (struct be_rx_page_info *)
+ pnob->rx_ctxt[fi];
+ pnob->rx_ctxt[fi] = (void *)NULL;
+ if ((rx_page_info->page_offset) ||
+ (OSM_NOB(pnob)->rx_pg_shared == FALSE)) {
+ pci_unmap_page(adapter->pdev,
+ pci_unmap_addr(rx_page_info, bus),
+ frag_sz, PCI_DMA_FROMDEVICE);
+ }
+
+ put_page(rx_page_info->page);
+ memset(rx_page_info, 0, sizeof(struct be_rx_page_info));
+ sa_atomic_decrement(&pnob->rx_q_posted);
+ }
+ return -ENOMEM;
+}
+
+
+/*
+ * Process unicast completions
+ */
+static void process_ucast_rx_completion(struct bni_net_object *pnob)
+{
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ struct ETH_RX_COMPL_AMAP *rxcp;
+ u32 nc = 0;
+ unsigned int pktsize;
+#ifdef CONFIG_INET_LRO
+ struct skb_frag_struct rx_frags[BE_MAX_FRAGS_PER_FRAME];
+ unsigned int udpcksm, tcpcksm;
+ u32 numfrags, vlanf, vtm, vlan_tag, nresid;
+ u16 vlant;
+ unsigned int fi, idx, n;
+ struct be_rx_page_info *rx_page_info;
+ unsigned int frag_sz = pnob->rx_buf_size;
+ bool rx_coal = (adapter->max_rx_coal <= 1) ? 0 : 1;
+ u8 err, *va;
+ __wsum csum = 0;
+#endif
+ int rearm = 1;
+
+#ifdef CONFIG_BENET_NAPI
+ if (OSM_NOB(pnob)->work_quota == 0)
+ /*
+ * We were called from process_events without quota
+ * because the device is not open yet. Give ourselves
+ * a large quota.
+ */
+ OSM_NOB(pnob)->work_quota = 128;
+ while ((OSM_NOB(pnob)->work_quota) &&
+ (rxcp = bni_get_ucrx_cmpl(pnob)))
+#else
+ while ((rxcp = bni_get_ucrx_cmpl(pnob)))
+#endif
+ {
+ prefetch(rxcp);
+ pktsize = AMAP_GET_BITS_PTR(ETH_RX_COMPL, pktsize, rxcp);
+#ifdef CONFIG_INET_LRO
+ if (AMAP_GET_BITS_PTR(ETH_RX_COMPL, ipsec, rxcp)) {
+ /*
+ * Drop the pkt and move to the next completion.
+ */
+ adapter->be_stat.bes_rx_misc_pkts++;
+ goto next_compl;
+ }
+ err = AMAP_GET_BITS_PTR(ETH_RX_COMPL, err, rxcp);
+ if (err || !rx_coal) {
+ /*
+ * We won't coalesce Rx pkts
+ * if they have the err bit set.
+ * take the path of normal completion processing
+ */
+ process_nic_rx_completion(pnob, rxcp);
+ goto next_compl;
+ }
+
+ fi = AMAP_GET_BITS_PTR(ETH_RX_COMPL, fragndx, rxcp);
+ SA_ASSERT(fi < (int)pnob->rx_q_len);
+ SA_ASSERT(fi >= 0);
+ rx_page_info = (struct be_rx_page_info *)
+ pnob->rx_ctxt[fi];
+ SA_ASSERT(rx_page_info);
+ SA_ASSERT(rx_page_info->page);
+ pnob->rx_ctxt[fi] = (void *)NULL;
+ /*
+ * If one page is used per fragment or if this is the
+ * second half of the page, unmap the page here
+ */
+ if ((rx_page_info->page_offset) ||
+ (OSM_NOB(pnob)->rx_pg_shared == FALSE)) {
+ pci_unmap_page(adapter->pdev,
+ pci_unmap_addr(rx_page_info, bus),
+ frag_sz, PCI_DMA_FROMDEVICE);
+ }
+
+ numfrags = AMAP_GET_BITS_PTR(ETH_RX_COMPL, numfrags, rxcp);
+ udpcksm = AMAP_GET_BITS_PTR(ETH_RX_COMPL, udpcksm, rxcp);
+ tcpcksm = AMAP_GET_BITS_PTR(ETH_RX_COMPL, tcpcksm, rxcp);
+ vlan_tag = AMAP_GET_BITS_PTR(ETH_RX_COMPL, vlan_tag, rxcp);
+ vlant = be16_to_cpu(vlan_tag);
+ vlanf = AMAP_GET_BITS_PTR(ETH_RX_COMPL, vtp, rxcp);
+ vtm = AMAP_GET_BITS_PTR(ETH_RX_COMPL, vtm, rxcp);
+
+ sa_atomic_decrement(&pnob->rx_q_posted);
+
+ if (tcpcksm && udpcksm && pktsize == 32) {
+ /* flush completion entries */
+ put_page(rx_page_info->page);
+ memset(rx_page_info, 0, sizeof(struct be_rx_page_info));
+ goto next_compl;
+ }
+ /* Only one of udpcksum and tcpcksum can be set */
+ SA_ASSERT(!(udpcksm && tcpcksm));
+
+ /* jumbo frames could come in multiple fragments */
+ SA_ASSERT(numfrags == ((pktsize + (frag_sz - 1)) / frag_sz));
+ n = MIN(pktsize, frag_sz);
+ nresid = pktsize - n; /* will be useful for jumbo pkts */
+ idx = 0;
+
+ va = page_address(rx_page_info->page) +
+ rx_page_info->page_offset;
+ prefetch(va);
+
+ rx_frags[idx].page = rx_page_info->page;
+ rx_frags[idx].page_offset = (rx_page_info->page_offset);
+ rx_frags[idx].size = n;
+ memset(rx_page_info, 0, sizeof(struct be_rx_page_info));
+
+ /*
+ * If we got multiple fragments, we have more data.
+ */
+ while (nresid) {
+ idx++;
+ fi = (fi + 1) % pnob->rx_q_len; /* Update frag index */
+
+ rx_page_info =
+ (struct be_rx_page_info *) pnob->rx_ctxt[fi];
+ pnob->rx_ctxt[fi] = (void *)NULL;
+ if ((rx_page_info->page_offset) ||
+ (OSM_NOB(pnob)->rx_pg_shared == FALSE)) {
+ pci_unmap_page(adapter->pdev,
+ pci_unmap_addr(rx_page_info, bus),
+ frag_sz, PCI_DMA_FROMDEVICE);
+ }
+
+ n = MIN(nresid, frag_sz);
+
+ rx_frags[idx].page = rx_page_info->page;
+ rx_frags[idx].page_offset = (rx_page_info->page_offset);
+ rx_frags[idx].size = n;
+
+ nresid -= n;
+
+ memset(rx_page_info, 0, sizeof(struct be_rx_page_info));
+ sa_atomic_decrement(&pnob->rx_q_posted);
+ }
+
+ if (likely(!(vlanf && vtm))) {
+ lro_receive_frags(&OSM_NOB(pnob)->lro_mgr, rx_frags,
+ pktsize, pktsize,
+ (void *)(unsigned long)csum,
+ csum);
+ } else {
+ /* Vlan tag present in pkt and BE found
+ * that the tag matched an entry in VLAN table
+ */
+ if (unlikely(!(OSM_NOB(pnob)->vlan_grp) ||
+ OSM_NOB(pnob)->num_vlans == 0)) {
+ /* But we have no VLANs configured.
+ * This should never happen. Drop the packet.
+ */
+ printk(KERN_ERR "BladeEngine: Unexpected" \
+ " vlan tagged packet\n");
+ goto next_compl;
+ }
+ /* pass the VLAN packet to stack */
+ lro_vlan_hwaccel_receive_frags(&OSM_NOB(pnob)->lro_mgr,
+ rx_frags, pktsize, pktsize,
+ OSM_NOB(pnob)->vlan_grp, vlant,
+ (void *)(unsigned long)csum,
+ csum);
+ }
+
+ adapter->be_stat.bes_rx_coal++;
+next_compl:
+#else
+ process_nic_rx_completion(pnob, rxcp);
+#endif
+ adapter->eth_rx_bytes += pktsize;
+ /*
+ * RX rate calculation.
+ */
+ update_rx_rate(adapter);
+ nc++; /* number of cq entries that we have processed */
+ adapter->be_stat.bes_ucrx_compl++;
+#ifdef CONFIG_BENET_NAPI
+ OSM_NOB(pnob)->work_quota--;
+#endif
+ }
+#ifdef CONFIG_INET_LRO
+ if (likely(rx_coal)) {
+ adapter->be_stat.bes_rx_flush++;
+ lro_flush_all(&OSM_NOB(pnob)->lro_mgr);
+ }
+#endif
+#ifdef CONFIG_BENET_NAPI
+ if (OSM_NOB(pnob)->work_quota == 0) {
+ /* we ran out of work budget */
+ rearm = 0;
+ } else {
+ /* we finished all work. We are in interrupt mode */
+ rearm = 1;
+ }
+#endif
+ /*
+ * we call notfiy completions even when nc is zero, since
+ * rearm value needs to take effect
+ */
+ bni_notify_cmpl(pnob, nc, pnob->ucrx_cq_id, rearm);
+}
+
+/*
+ * Process broadcast and multicat completions
+ */
+static void process_bcast_rx_completion(struct bni_net_object *pnob)
+{
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ struct ETH_RX_COMPL_AMAP *rxcp;
+
+ u32 nc = 0;
+
+ adapter->be_stat.bes_bcrx_events++;
+
+ nc = 0;
+ while ((rxcp = (bni_get_bcrx_cmpl(pnob)))) {
+ process_nic_rx_completion(pnob, rxcp);
+ nc++;
+ adapter->be_stat.bes_bcrx_compl++;
+ }
+ bni_notify_cmpl(pnob, nc, pnob->bcrx_cq_id, 1);
+
+}
+
+/* Process NIC TX COMPLETIONS */
+static void process_nic_tx_completions(struct bni_net_object *pnob)
+{
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ struct ETH_TX_COMPL_AMAP *txcp; /* Eth Tx completion entry */
+ struct net_device *netdev = (struct net_device *)
+ OSM_NOB(pnob)->os_handle;
+ int num_processed = 0, cur_index, tx_wrbs_completed = 0, exp_index;
+ struct sk_buff *skb;
+ u64 busaddr, pa, pa_lo, pa_hi;
+ struct ETH_WRB_AMAP *curr_wrb;
+ u32 frag_len, wrb_index;
+
+ adapter->be_stat.bes_tx_events++;
+ /*
+ * there is no need to take an SMP lock here since currently
+ * we have only one instance of the tasklet that does completion
+ * processing.
+ */
+
+ /* process each valid completion entry */
+ while ((txcp = bni_get_tx_cmpl(pnob))) {
+ /* Get the expected completion index */
+ exp_index = (pnob->tx_q_tl +
+ ((int)pnob->tx_ctxt[pnob->tx_q_tl] - 1))
+ % pnob->tx_q_len;
+ pnob->tx_ctxt[pnob->tx_q_tl] = NULL;
+ wrb_index = AMAP_GET_BITS_PTR(ETH_TX_COMPL, wrb_index, txcp);
+ if (exp_index != wrb_index) {
+ printk(KERN_ERR "Expected Wrb Index (=%d) does not"
+ "match with completion Wrb Index (=%d)\n",
+ exp_index, wrb_index);
+ }
+ /*
+ * All reqs in the TX ring from the current tail index upto
+ * the one indicated in this completion entry's wrb_index
+ * are now completed.
+ */
+ do {
+ cur_index = pnob->tx_q_tl;
+
+ curr_wrb = &pnob->tx_q[cur_index];
+ pa_hi = AMAP_GET_BITS_PTR(ETH_WRB, frag_pa_hi,
+ curr_wrb);
+ pa_lo = AMAP_GET_BITS_PTR(ETH_WRB, frag_pa_lo,
+ curr_wrb);
+ frag_len = AMAP_GET_BITS_PTR(ETH_WRB, frag_len,
+ curr_wrb);
+ busaddr = (pa_hi << 32) | pa_lo;
+ if (busaddr != 0) {
+ pa = le64_to_cpu(busaddr);
+ pci_unmap_single(adapter->pdev, pa,
+ frag_len, PCI_DMA_TODEVICE);
+ }
+ /*
+ * this Tx request is complete. The OSM context
+ * we stored is the skb address. free this skb.
+ */
+ skb = (struct sk_buff *) pnob->tx_ctxt[cur_index];
+ if (skb) {
+ unsigned int j;
+
+ for (j = 0; j < skb_shinfo(skb)->nr_frags;
+ j++) {
+ struct skb_frag_struct *frag;
+ frag = &skb_shinfo(skb)->frags[j];
+ pci_unmap_page(adapter->pdev,
+ (ulong) frag->page,
+ frag->size,
+ PCI_DMA_TODEVICE);
+ }
+ kfree_skb(skb);
+ pnob->tx_ctxt[cur_index] = NULL;
+ }
+
+ tx_wrbs_completed++;
+ bni_adv_txq_tl(pnob);
+ } while (cur_index != wrb_index);
+
+ num_processed++;
+ adapter->be_stat.bes_tx_compl++;
+ }
+ sa_atomic_sub(tx_wrbs_completed, &pnob->tx_q_used);
+ bni_notify_cmpl(pnob, num_processed, pnob->tx_cq_id, 1);
+ /*
+ * We got Tx completions and have usable WRBs.
+ * If the netdev's queue has been stopped
+ * because we had run out of WRBs, wake it now.
+ */
+ spin_lock(&adapter->txq_lock);
+ if (netif_queue_stopped(netdev)
+ && (pnob->tx_q_used < pnob->tx_q_len / 2)) {
+ netif_wake_queue(netdev);
+ }
+ spin_unlock(&adapter->txq_lock);
+}
+
+/*
+ * posts receive buffers to the Eth receive queue.
+ */
+void post_eth_rx_buffs(struct bni_net_object *pnob)
+{
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ u32 num_bufs, r;
+ u64 busaddr = 0, tmp_pa;
+ u32 max_bufs, pg_hd;
+ u32 frag_size;
+ struct BNI_RECV_BUFFER *rxbp;
+ SA_LIST_ENTRY rxbl;
+ struct be_rx_page_info *rx_page_info;
+ struct page *page = NULL;
+ u32 page_order = 0;
+ gfp_t alloc_flags = (gfp_t)GFP_ATOMIC;
+
+ SA_ASSERT(adapter);
+
+ max_bufs = (u32) 64; /* should be even # <= 255. */
+ SA_ASSERT(max_bufs < 255 && (max_bufs & 1) == 0);
+
+ frag_size = pnob->rx_buf_size;
+
+ if (frag_size == 8192) {
+ page_order = 1;
+ alloc_flags |= (gfp_t)__GFP_COMP;
+ }
+
+ /*
+ * Form a linked list of RECV_BUFFFER structure to be be posted.
+ * We will post even number of buffer so that pages can be
+ * shared.
+ */
+ sa_initialize_list_head(&rxbl);
+
+ for (num_bufs = 0; num_bufs < max_bufs; ++num_bufs) {
+
+ rxbp = &(OSM_NOB(pnob)->eth_rx_bufs[num_bufs]);
+ pg_hd = OSM_NOB(pnob)->rx_pg_info_hd;
+ rx_page_info = &OSM_NOB(pnob)->rx_page_info[pg_hd];
+
+ if (!page) {
+ /*
+ * before we allocate a page make sure that we
+ * have space in the RX queue to post the buffer.
+ * We check for two vacant slots since with
+ * 2K frags, we will need two slots.
+ */
+ if ((pnob->rx_ctxt[(pnob->rx_q_hd +
+ num_bufs) % pnob->rx_q_len] != NULL)
+ || (pnob->rx_ctxt[(pnob->rx_q_hd + num_bufs + 1) %
+ pnob->rx_q_len] != NULL)) {
+ break;
+ }
+ page = alloc_pages(alloc_flags, page_order);
+ if (unlikely(page == NULL)) {
+ adapter->be_stat.bes_ethrx_post_fail++;
+ OSM_NOB(pnob)->rxbuf_post_fail++;
+ break;
+ }
+ OSM_NOB(pnob)->rxbuf_post_fail = 0;
+ busaddr = pci_map_page(adapter->pdev, page, 0,
+ frag_size,
+ PCI_DMA_FROMDEVICE);
+ rx_page_info->page_offset = 0;
+ rx_page_info->page = page;
+ /*
+ * If we are sharing a page among two skbs,
+ * alloc a new one on the next iteration
+ */
+ if (OSM_NOB(pnob)->rx_pg_shared == FALSE)
+ page = NULL;
+ } else {
+ get_page(page);
+ rx_page_info->page_offset += frag_size;
+ rx_page_info->page = page;
+ /*
+ * We are finished with the alloced page,
+ * Alloc a new one on the next iteration
+ */
+ page = NULL;
+ }
+ rxbp->rxb_ctxt = (void *)rx_page_info;
+ OSM_NOB(pnob)->rx_pg_info_hd =
+ (OSM_NOB(pnob)->rx_pg_info_hd + 1) % pnob->rx_q_len;
+
+ pci_unmap_addr_set(rx_page_info, bus, busaddr);
+ tmp_pa = busaddr + rx_page_info->page_offset;
+ rxbp->rxb_pa_lo = (tmp_pa & 0xFFFFFFFF);
+ rxbp->rxb_pa_hi = (tmp_pa >> 32);
+ rxbp->rxb_len = frag_size;
+ InsertTailList(&rxbl, &rxbp->rxb_list);
+ } /* End of for */
+
+ r = bni_post_rx_buffs(pnob, &rxbl);
+ SA_ASSERT(r == num_bufs);
+ return;
+}
+
+/*
+ * Interrupt service for network function. We just schedule the
+ * tasklet which does all completion processing.
+ */
+irqreturn_t be_int(int irq, void *dev, struct pt_regs *regs)
+{
+ struct net_device *netdev = dev;
+ struct bni_net_object *pnob = (struct bni_net_object *) (netdev->priv);
+ struct be_adapter *adapter = (struct be_adapter *)
+ OSM_NOB(pnob)->adapter;
+ u32 isr;
+
+ /*
+ * If not our interrupt, just return.
+ */
+ isr = bni_get_isr(pnob);
+ if (unlikely(!isr))
+ return 0;
+
+ spin_lock(&adapter->int_lock);
+ adapter->isr |= isr;
+ spin_unlock(&adapter->int_lock);
+
+ adapter->be_stat.bes_ints++;
+
+ tasklet_schedule(&adapter->sts_handler);
+ return 1;
+}
+
+#ifdef CONFIG_BENET_NAPI
+/*
+ * Poll function called by NAPI with a work budget.
+ * We process as many UC. BC and MC receive completions
+ * as the budget allows and return the actual number of
+ * RX ststutses processed.
+ */
+int be_poll(struct napi_struct *napi, int budget)
+{
+ struct net_device *netdev = napi->dev;
+ struct bni_net_object *pnob = (struct bni_net_object *) netdev->priv;
+ struct be_adapter *adapter = (struct be_adapter *)
+ OSM_NOB(pnob)->adapter;
+ u32 work_done;
+
+ adapter->be_stat.bes_polls++;
+ OSM_NOB(pnob)->work_quota = budget;
+ process_ucast_rx_completion(pnob);
+ process_bcast_rx_completion(pnob);
+ if (pnob->rx_q_posted < 900)
+ post_eth_rx_buffs(pnob);
+
+ work_done = (budget - OSM_NOB(pnob)->work_quota);
+
+ if (OSM_NOB(pnob)->work_quota == 0)
+ return budget;
+ netif_rx_complete(netdev, napi);
+
+ /* If another rx was attempted while we were in poll, schedule again */
+ spin_lock_bh(&OSM_NOB(pnob)->rx_lock);
+ if (OSM_NOB(pnob)->rx_sched) {
+ OSM_NOB(pnob)->rx_sched = FALSE;
+ if (netif_rx_schedule_prep(netdev, napi))
+ __netif_rx_schedule(netdev, napi);
+ }
+ spin_unlock_bh(&OSM_NOB(pnob)->rx_lock);
+ return (budget - OSM_NOB(pnob)->work_quota);
+}
+
+#define SCHEDULE_NAPI_RX(no, nd) \
+ { \
+ spin_lock_bh(&OSM_NOB(no)->rx_lock); \
+ if (netif_rx_schedule_prep(nd, \
+ &OSM_NOB(no)->napi)) { \
+ __netif_rx_schedule(nd, \
+ &OSM_NOB(no)->napi); \
+ OSM_NOB(no)->rx_sched = FALSE; \
+ } \
+ else { \
+ OSM_NOB(no)->rx_sched = TRUE; \
+ } \
+ spin_unlock_bh(&OSM_NOB(no)->rx_lock); \
+ }
+#endif
+
+/*
+ * Processes all valid events in the event ring associated with given
+ * NetObject. Also, notifies BE the number of events processed.
+ */
+static inline u32 process_events(struct bni_net_object *pnob)
+{
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ struct EQ_ENTRY_AMAP *eqp;
+ u32 rid, num_events = 0;
+
+#ifdef CONFIG_BENET_NAPI
+ struct net_device *netdev = OSM_NOB(pnob)->os_handle;
+#endif
+
+ while ((eqp = bni_get_event(pnob)) != NULL) {
+ adapter->be_stat.bes_events++;
+ rid = AMAP_GET_BITS_PTR(EQ_ENTRY, ResourceID, eqp);
+
+ if (rid == pnob->ucrx_cq_id) {
+ adapter->be_stat.bes_ucrx_events++;
+#ifdef CONFIG_BENET_NAPI
+ if (adapter->dev_state == BE_DEV_STATE_OPEN)
+ SCHEDULE_NAPI_RX(pnob, netdev)
+ else
+#endif
+ process_ucast_rx_completion(pnob);
+ } else if (rid == pnob->bcrx_cq_id) {
+ adapter->be_stat.bes_bcrx_events++;
+#ifdef CONFIG_BENET_NAPI
+ if (adapter->dev_state == BE_DEV_STATE_OPEN)
+ SCHEDULE_NAPI_RX(pnob, netdev)
+ else
+#endif
+ process_bcast_rx_completion(pnob);
+ } else if (rid == pnob->tx_cq_id) {
+ process_nic_tx_completions(pnob);
+ } else if (rid == pnob->mcc_cq_id) {
+ bni_process_mcc_cmpl(&pnob->mcc_q_obj);
+ } else {
+ printk("Invalid EQ ResourceID %d\n", rid);
+ }
+ AMAP_SET_BITS_PTR(EQ_ENTRY, Valid, eqp, 0);
+ AMAP_SET_BITS_PTR(EQ_ENTRY, ResourceID, eqp, 0);
+ num_events++;
+ }
+ return (num_events);
+}
+
+/*
+ * Called from the tasklet scheduled by ISR. All real interrupt processing
+ * is done here.
+ */
+void osm_process_sts(unsigned long context)
+{
+ struct be_adapter *adapter = (struct be_adapter *) context;
+ struct bni_net_object *pnob;
+ u32 isr, n;
+ ulong flags = 0;
+
+ SA_ASSERT(adapter);
+
+ isr = adapter->isr;
+
+ /*
+ * we create only one NIC event queue in Linux. Event is
+ * expected only in the first event queue
+ */
+ SA_ASSERT((isr & 0xfffffffe) == 0)
+ if ((isr & 1) == 0)
+ return; /* not our interrupt */
+ pnob = adapter->net_obj;
+ n = process_events(pnob);
+ /*
+ * Clear the event bit. adapter->isr is set by
+ * hard interrupt. Prevent race with lock.
+ */
+ spin_lock_irqsave(&adapter->int_lock, flags);
+ adapter->isr &= ~1;
+ spin_unlock_irqrestore(&adapter->int_lock, flags);
+ bni_notify_event(pnob, n, 1);
+
+#ifdef CONFIG_BENET_NAPI
+ /*
+ * In NAPI, posting of rx bufs is normally done
+ * in poll. However, if the device is not open
+ * or if previous allocation attempts had failed and
+ * BE has used up all posted buffers, we need to
+ * post here, since be_poll may never be called.
+ */
+ if ((adapter->dev_state != BE_DEV_STATE_OPEN &&
+ pnob->rx_q_posted < 900) ||
+ ((OSM_NOB(pnob)->rxbuf_post_fail) && (pnob->rx_q_posted == 0))) {
+ post_eth_rx_buffs(pnob);
+ }
+#else
+ if (pnob->rx_q_posted < 900)
+ post_eth_rx_buffs(pnob);
+#endif
+ update_eqd(adapter, pnob);
+ return;
+}
diff --git a/drivers/net/benet/be_netif.c b/drivers/net/benet/be_netif.c
new file mode 100644
index 0000000..881aa82
--- /dev/null
+++ b/drivers/net/benet/be_netif.c
@@ -0,0 +1,721 @@
+/*
+ * Copyright (C) 2005 - 2008 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
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or at your option any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, 5th Floor
+ * Boston, MA 02110-1301 USA
+ *
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called GPL.
+ *
+ * Contact Information:
+ * linux-drivers@...verengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ *
+ */
+/*
+ * be_netif.c
+ *
+ * This file contains various entry points of drivers seen by tcp/ip stack.
+ */
+
+#include <linux/pci.h>
+#include <linux/if_vlan.h>
+#include <linux/in.h>
+#include "be.h"
+#include <linux/ip.h>
+#include <linux/inet_lro.h>
+
+/* Strings to print Link properties */
+static char *link_speed[] = {
+ "Invalid link Speed Value",
+ "10 Mbps",
+ "100 Mbps",
+ "1 Gbps",
+ "10 Gbps"
+};
+
+static char *link_duplex[] = {
+ "Invalid Duplex Value",
+ "Half Duplex",
+ "Full Duplex"
+};
+
+static char *link_state[] = {
+ "",
+ "(active)"
+};
+
+
+void be_print_link_info(struct BE_LINK_STATUS *lnk_status)
+{
+ u16 si, di, ai;
+
+ /* Port 0 */
+ if (lnk_status->mac0_speed && lnk_status->mac0_duplex) {
+ /* Port is up and running */
+ si = (lnk_status->mac0_speed < 5) ?
+ lnk_status->mac0_speed : 0;
+ di = (lnk_status->mac0_duplex < 3) ?
+ lnk_status->mac0_duplex : 0;
+ ai = (lnk_status->active_port == 0) ? 1 : 0;
+ printk(KERN_INFO "PortNo. 0: Speed - %s %s %s\n",
+ link_speed[si], link_duplex[di], link_state[ai]);
+ } else
+ printk(KERN_INFO "PortNo. 0: Down\n");
+
+ /* Port 1 */
+ if (lnk_status->mac1_speed && lnk_status->mac1_duplex) {
+ /* Port is up and running */
+ si = (lnk_status->mac1_speed < 5) ?
+ lnk_status->mac1_speed : 0;
+ di = (lnk_status->mac1_duplex < 3) ?
+ lnk_status->mac1_duplex : 0;
+ ai = (lnk_status->active_port == 0) ? 1 : 0;
+ printk(KERN_INFO "PortNo. 1: Speed - %s %s %s\n",
+ link_speed[si], link_duplex[di], link_state[ai]);
+ } else
+ printk(KERN_INFO "PortNo. 1: Down\n");
+
+ return;
+}
+
+#ifdef CONFIG_INET_LRO
+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;
+
+ /* find the mac header, abort if not IPv4 */
+
+ 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;
+}
+#endif
+
+static int benet_open(struct net_device *netdev)
+{
+ struct bni_net_object *pnob = (struct bni_net_object *) netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+#ifdef CONFIG_INET_LRO
+ struct net_lro_mgr *lro_mgr;
+#endif
+
+ if (adapter->dev_state < BE_DEV_STATE_INIT)
+ return -EAGAIN;
+
+#ifdef CONFIG_INET_LRO
+ lro_mgr = &OSM_NOB(pnob)->lro_mgr;
+ lro_mgr->dev = netdev;
+
+#ifdef CONFIG_BENET_NAPI
+ lro_mgr->features = LRO_F_NAPI;
+#endif
+ 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 = OSM_NOB(pnob)->lro_desc;
+ lro_mgr->get_frag_header = be_get_frag_header;
+ lro_mgr->max_aggr = adapter->max_rx_coal;
+ lro_mgr->frag_align_pad = 2;
+ if (lro_mgr->max_aggr > MAX_SKB_FRAGS)
+ lro_mgr->max_aggr = MAX_SKB_FRAGS;
+#endif
+
+ be_update_link_status(adapter);
+
+ /*
+ * Set carrier on only if Physical Link up
+ * Either of the port link status up signifies this
+ */
+ if ((adapter->port0_link_sts == BE_PORT_LINK_UP) ||
+ (adapter->port1_link_sts == BE_PORT_LINK_UP)) {
+ netif_start_queue(netdev);
+ netif_carrier_on(netdev);
+ }
+
+ bni_enable_eq_intr(pnob);
+ adapter->dev_state = BE_DEV_STATE_OPEN;
+
+#ifdef CONFIG_BENET_NAPI
+ napi_enable(&OSM_NOB(pnob)->napi);
+#endif
+ return 0;
+}
+
+static int benet_close(struct net_device *netdev)
+{
+ struct bni_net_object *pnob = (struct bni_net_object *) netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+
+ /* Stop Transmitting */
+ netif_stop_queue(netdev);
+
+ synchronize_irq(netdev->irq);
+
+ /* Wait until no more pending transmits */
+ wait_nic_tx_cmpl(pnob);
+
+ adapter->dev_state = BE_DEV_STATE_INIT;
+
+ netif_carrier_off(netdev);
+
+ adapter->port0_link_sts = BE_PORT_LINK_DOWN;
+ adapter->port1_link_sts = BE_PORT_LINK_DOWN;
+
+#ifdef CONFIG_BENET_NAPI
+ napi_disable(&OSM_NOB(pnob)->napi);
+#endif
+ return 0;
+}
+
+/*
+ * Setting a Mac Address for BE
+ * Takes netdev and a void pointer as arguments.
+ * The pointer holds the new addres to be used.
+ */
+static int benet_set_mac_addr(struct net_device *netdev, void *p)
+{
+ struct sockaddr *addr = p;
+ struct bni_net_object *pnob;
+ struct SA_MAC_ADDRESS mac_addr;
+
+ SA_ASSERT(netdev);
+ pnob = (struct bni_net_object *) netdev->priv;
+ SA_ASSERT(pnob);
+
+ memcpy(pnob->mac_address, addr->sa_data, netdev->addr_len);
+ memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
+ memcpy(mac_addr.bytes, pnob->mac_address, SA_MAC_ADDRESS_SIZE);
+ bni_set_uc_mac_adr(pnob, 0, 0, OSM_NOB(pnob)->devno,
+ &mac_addr, NULL, NULL);
+ /*
+ * Since we are doing Active-Passive failover, both
+ * ports should have matching MAC addresses everytime.
+ */
+ bni_set_uc_mac_adr(pnob, 1, 0, OSM_NOB(pnob)->devno,
+ &mac_addr, NULL, NULL);
+
+ return 0;
+}
+
+void get_stats_timer_handler(unsigned long context)
+{
+ struct be_timer_ctxt *ctxt = (struct be_timer_ctxt *) context;
+
+ if (atomic_read(&ctxt->get_stat_flag)) {
+ atomic_dec(&ctxt->get_stat_flag);
+ up((void *) ctxt->get_stat_sem);
+ }
+ del_timer(&ctxt->get_stats_timer);
+ return;
+}
+
+void get_stat_cb(void *context, BESTATUS status,
+ struct MCC_WRB_AMAP *optional_wrb)
+{
+ struct be_timer_ctxt *ctxt = (struct be_timer_ctxt *) context;
+ /*
+ * just up the semaphore if the get_stat_flag
+ * reads 1. so that the waiter can continue.
+ * If it is 0, then it was handled by the timer handler.
+ */
+ del_timer(&ctxt->get_stats_timer);
+ if (atomic_read(&ctxt->get_stat_flag)) {
+ atomic_dec(&ctxt->get_stat_flag);
+ up((void *) ctxt->get_stat_sem);
+ }
+}
+
+struct net_device_stats *benet_get_stats(struct net_device *dev)
+{
+ struct bni_net_object *pnob = dev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ u64 pa;
+ struct be_timer_ctxt *ctxt = &adapter->timer_ctxt;
+
+ if (adapter->dev_state != BE_DEV_STATE_OPEN || (adapter->pm_resume)) {
+ /* Return previously read stats */
+ return &(adapter->benet_stats);
+ }
+ /* Get Physical Addr */
+ pa = pci_map_single(adapter->pdev, adapter->eth_statsp,
+ sizeof(struct IOCTL_ETH_GET_STATISTICS),
+ PCI_DMA_FROMDEVICE);
+ pa = cpu_to_le64(pa);
+ ctxt->get_stat_sem = (unsigned long)&adapter->get_eth_stat_sem;
+ atomic_inc(&ctxt->get_stat_flag);
+ bni_get_stats(adapter->net_obj, adapter->eth_statsp,
+ pa, get_stat_cb, (void *) ctxt);
+ ctxt->get_stats_timer.data = (unsigned long)ctxt;
+ mod_timer(&ctxt->get_stats_timer, (jiffies + (HZ * 2)));
+ down((void *) ctxt->get_stat_sem); /* block till callback is called */
+
+ /*Adding port0 and port1 stats. */
+ adapter->benet_stats.rx_packets =
+ adapter->eth_statsp->params.response.p0recvdtotalframes +
+ adapter->eth_statsp->params.response.p1recvdtotalframes;
+ adapter->benet_stats.tx_packets =
+ adapter->eth_statsp->params.response.p0xmitunicastframes +
+ adapter->eth_statsp->params.response.p1xmitunicastframes;
+ adapter->benet_stats.tx_bytes =
+ adapter->eth_statsp->params.response.p0xmitbyteslsd +
+ adapter->eth_statsp->params.response.p1xmitbyteslsd;
+ adapter->benet_stats.rx_errors =
+ adapter->eth_statsp->params.response.p0crcerrors +
+ adapter->eth_statsp->params.response.p1crcerrors;
+ adapter->benet_stats.rx_errors +=
+ adapter->eth_statsp->params.response.p0alignmentsymerrs +
+ adapter->eth_statsp->params.response.p1alignmentsymerrs;
+ adapter->benet_stats.rx_errors +=
+ adapter->eth_statsp->params.response.p0inrangelenerrors +
+ adapter->eth_statsp->params.response.p1inrangelenerrors;
+ adapter->benet_stats.rx_bytes =
+ adapter->eth_statsp->params.response.p0recvdtotalbytesLSD +
+ adapter->eth_statsp->params.response.p1recvdtotalbytesLSD;
+ adapter->benet_stats.rx_crc_errors =
+ adapter->eth_statsp->params.response.p0crcerrors +
+ adapter->eth_statsp->params.response.p1crcerrors;
+
+ adapter->benet_stats.tx_packets +=
+ adapter->eth_statsp->params.response.p0xmitmulticastframes +
+ adapter->eth_statsp->params.response.p1xmitmulticastframes;
+ adapter->benet_stats.tx_packets +=
+ adapter->eth_statsp->params.response.p0xmitbroadcastframes +
+ adapter->eth_statsp->params.response.p1xmitbroadcastframes;
+ adapter->benet_stats.tx_errors = 0;
+
+ adapter->benet_stats.multicast =
+ adapter->eth_statsp->params.response.p0xmitmulticastframes +
+ adapter->eth_statsp->params.response.p1xmitmulticastframes;
+
+ adapter->benet_stats.rx_fifo_errors =
+ adapter->eth_statsp->params.response.p0rxfifooverflowdropped +
+ adapter->eth_statsp->params.response.p1rxfifooverflowdropped;
+ adapter->benet_stats.rx_frame_errors =
+ adapter->eth_statsp->params.response.p0alignmentsymerrs +
+ adapter->eth_statsp->params.response.p1alignmentsymerrs;
+ adapter->benet_stats.rx_length_errors =
+ adapter->eth_statsp->params.response.p0inrangelenerrors +
+ adapter->eth_statsp->params.response.p1inrangelenerrors;
+ adapter->benet_stats.rx_length_errors +=
+ adapter->eth_statsp->params.response.p0outrangeerrors +
+ adapter->eth_statsp->params.response.p1outrangeerrors;
+ adapter->benet_stats.rx_length_errors +=
+ adapter->eth_statsp->params.response.p0frametoolongerrors +
+ adapter->eth_statsp->params.response.p1frametoolongerrors;
+
+ pci_unmap_single(adapter->pdev, (ulong) adapter->eth_statsp,
+ sizeof(struct IOCTL_ETH_GET_STATISTICS),
+ PCI_DMA_FROMDEVICE);
+ return &(adapter->benet_stats);
+
+}
+
+/* Transmit Function */
+int betx_ether_frame(struct be_adapter *adapter, struct bni_net_object *pnob,
+ struct sk_buff *skb, u8 proto, u8 forward,
+ u16 lso_mss)
+{
+ unsigned int nfrags = 0, j, frame_size = 0;
+ struct BNI_TX_FRAG_LIST tx_frag_list[BE_MAX_TX_FRAG_COUNT];
+ unsigned int tx_flags;
+ void *ctxtp;
+ unsigned short vlant = 0;
+ unsigned short tx_mss = 0;
+ u64 busaddr;
+ int status;
+
+ tx_flags = ETHCOMPLETE;
+
+ if (OSM_NOB(pnob)->vlan_grp && vlan_tx_tag_present(skb)) {
+ tx_flags |= ETHVLAN;
+ vlant = vlan_tx_tag_get(skb);
+ }
+ ctxtp = (void *)skb;
+
+ if (proto == IPPROTO_TCP)
+ tx_flags |= TCPCS;
+
+ if (proto == IPPROTO_UDP)
+ tx_flags |= UDPCS;
+
+ if (forward) {
+ tx_flags |= FORWARD;
+ adapter->be_stat.bes_fwd_reqs++;
+ }
+
+ if (lso_mss) {
+ tx_flags |= LSO;
+ tx_mss = lso_mss;
+ }
+
+ adapter->be_stat.bes_tx_reqs++;
+ /* populate the fragment (SG) list for this request */
+ while (skb) {
+ /*
+ * Check whether Fragment count goes above
+ * BE_MAX_TX_FRAG_COUNT
+ */
+ if ((nfrags + 1) > BE_MAX_TX_FRAG_COUNT)
+ goto max_tx_frag_error;
+
+ /*
+ * Get required info from main fragment of skb
+ * First get Quad Address
+ */
+ busaddr = pci_map_single(adapter->pdev, skb->data,
+ (skb->len - skb->data_len),
+ PCI_DMA_TODEVICE);
+ busaddr = cpu_to_le64(busaddr);
+ tx_frag_list[nfrags].txb_pa_lo = (busaddr & 0xFFFFFFFF);
+ tx_frag_list[nfrags].txb_pa_hi = busaddr >> 32;
+ /* Next get Length */
+ tx_frag_list[nfrags].txb_len = skb->len - skb->data_len;
+ frame_size += tx_frag_list[nfrags].txb_len;
+ nfrags++;
+
+ /* For all the data fragments in this skb */
+ for (j = 0; j < skb_shinfo(skb)->nr_frags; j++) {
+ struct skb_frag_struct *frag;
+ /*
+ * Check whether Fragment count goes
+ * above BE_MAX_TX_FRAG_COUNT
+ */
+ if ((nfrags + 1) > BE_MAX_TX_FRAG_COUNT)
+ goto max_tx_frag_error;
+
+ /* For each fragment get required info */
+ frag = &skb_shinfo(skb)->frags[j];
+ /* First get Quad Address */
+ busaddr = pci_map_page(adapter->pdev,
+ frag->page,
+ frag->page_offset,
+ frag->size,
+ PCI_DMA_TODEVICE);
+ busaddr = cpu_to_le64(busaddr);
+ tx_frag_list[nfrags].txb_pa_lo = busaddr & 0xFFFFFFFF;
+ tx_frag_list[nfrags].txb_pa_hi = busaddr >> 32;
+ /* Next get Length */
+ tx_frag_list[nfrags].txb_len = frag->size;
+ frame_size += tx_frag_list[nfrags].txb_len;
+ nfrags++;
+ }
+
+ /*
+ * If the skb shared info points to another
+ * sk_buff then traverse this pointed
+ * skbuff in the same way till the end of the list
+ */
+ skb = skb_shinfo(skb)->frag_list;
+ }
+
+ spin_lock_bh(&adapter->txq_lock);
+
+ /* Transmit the packet */
+ status = bni_tx_pkt(pnob, tx_frag_list,
+ tx_flags, vlant, tx_mss, ctxtp, nfrags);
+ if (status != BE_SUCCESS) {
+ /* Tell the stack that Tx failed. */
+ netif_stop_queue((struct net_device *)
+ OSM_NOB(pnob)->os_handle);
+ adapter->be_stat.bes_tx_fails++;
+ spin_unlock_bh(&adapter->txq_lock);
+ return BE_ETH_TX_ERROR;
+ }
+ adapter->eth_tx_bytes += frame_size; /* for rate calculation */
+ /*
+ * TX rate calculation. If one second has passed since
+ * last calculation update the rate now.
+ */
+ update_tx_rate(adapter);
+ if (nfrags & 1)
+ nfrags++;
+
+ adapter->be_stat.bes_tx_wrbs += nfrags;
+
+ /* Ring the send doorbell */
+ bni_start_tx(pnob, nfrags);
+ spin_unlock_bh(&adapter->txq_lock);
+
+ return BE_SUCCESS;
+
+max_tx_frag_error:
+ /*
+ * This skb cannot be transmitted since it exceeds max tx frag count
+ * Return with appropriate error
+ */
+ printk(KERN_WARNING "%s: Exceeds Max Tx Frags\n", __func__);
+ return BE_ETH_TX_ERROR;
+}
+
+/*
+ * function called by the stack for transmitting an ether frame
+ */
+static int benet_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+ u8 proto;
+ struct iphdr *ip;
+ u16 lso_mss;
+ u32 segs;
+
+ lso_mss = skb_shinfo(skb)->gso_size;
+ segs = skb_shinfo(skb)->gso_segs;
+ /*
+ * bug# 3356.
+ * If a LSO request translates into a single segment,
+ * it should be posted as a ethernet WRB with no LSO.
+ */
+ if (segs == 1)
+ lso_mss = 0;
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ ip = (struct iphdr *)ip_hdr(skb);
+ proto = ip->protocol;
+ } else {
+ proto = 0;
+ }
+
+ if (betx_ether_frame(adapter, pnob, skb, proto, 0, lso_mss) !=
+ BE_SUCCESS) {
+ return NETDEV_TX_BUSY;
+ }
+
+ netdev->trans_start = jiffies;
+ return NETDEV_TX_OK;
+
+}
+
+/*
+ * This is the driver entry point to change the mtu of the device
+ * Returns 0 for success and errno for failure.
+ */
+static int benet_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ /*
+ * BE supports jumbo frame size upto 9000 bytes including the link layer
+ * header. Considering the different variants of frame formats possible
+ * like VLAN, SNAP/LLC, the maximum possible value for MTU is 8974 bytes
+ */
+
+ if (new_mtu < (ETH_ZLEN + ETH_FCS_LEN) || (new_mtu > BE_MAX_MTU)) {
+ printk(KERN_WARNING "Invalid MTU requested. "
+ "Must be between %d and %d bytes\n",
+ (ETH_ZLEN+ETH_FCS_LEN), BE_MAX_MTU);
+ return -EINVAL;
+ }
+ printk(KERN_INFO "MTU changed from %d to %d\n", netdev->mtu,
+ new_mtu);
+ netdev->mtu = new_mtu;
+ return 0;
+}
+
+/*
+ * This is the driver entry point to register a vlan with the device
+ */
+static void benet_vlan_register(struct net_device *netdev,
+ struct vlan_group *grp)
+{
+ struct bni_net_object *pnob = netdev->priv;
+
+ bni_disable_eq_intr(pnob);
+ OSM_NOB(pnob)->vlan_grp = grp;
+ OSM_NOB(pnob)->num_vlans = 0;
+ bni_enable_eq_intr(pnob);
+}
+
+/*
+ * This is the driver entry point to add a vlan vlan_id
+ * with the device netdev
+ */
+static void benet_vlan_add_vid(struct net_device *netdev, u16 vlan_id)
+{
+ struct bni_net_object *pnob = netdev->priv;
+
+ if (OSM_NOB(pnob)->num_vlans == (BE_NUM_VLAN_SUPPORTED-1)) {
+ /* no way to return an error */
+ printk(KERN_ERR
+ "BladeEngine: Cannot configure more than %d Vlans\n",
+ BE_NUM_VLAN_SUPPORTED);
+ return;
+ }
+ /*The new vlan tag will be in the slot indicated by num_vlans. */
+ OSM_NOB(pnob)->vlan_tag[OSM_NOB(pnob)->num_vlans++] = vlan_id;
+ bni_config_vlan(pnob, OSM_NOB(pnob)->vlan_tag,
+ OSM_NOB(pnob)->num_vlans, NULL, NULL, 0);
+}
+
+/*
+ * This is the driver entry point to remove a vlan vlan_id
+ * with the device netdev
+ */
+static void benet_vlan_rem_vid(struct net_device *netdev, u16 vlan_id)
+{
+ struct bni_net_object *pnob = netdev->priv;
+
+ u32 i, value;
+
+ /*
+ * In Blade Engine, we support 32 vlan tag filters across both ports.
+ * To program a vlan tag, the RXF_RTPR_CSR register is used.
+ * Each 32-bit value of RXF_RTDR_CSR can address 2 vlan tag entries.
+ * The Vlan table is of depth 16. thus we support 32 tags.
+ */
+
+ value = vlan_id | VLAN_VALID_BIT;
+ for (i = 0; i < BE_NUM_VLAN_SUPPORTED; i++) {
+ if (OSM_NOB(pnob)->vlan_tag[i] == vlan_id)
+ break;
+ }
+
+ if (i == BE_NUM_VLAN_SUPPORTED)
+ return;
+ /* Now compact the vlan tag array by removing hole created. */
+ while ((i + 1) < BE_NUM_VLAN_SUPPORTED) {
+ OSM_NOB(pnob)->vlan_tag[i] = OSM_NOB(pnob)->vlan_tag[i + 1];
+ i++;
+ }
+ if ((i + 1) == BE_NUM_VLAN_SUPPORTED)
+ OSM_NOB(pnob)->vlan_tag[i] = (u16) 0x0;
+ OSM_NOB(pnob)->num_vlans--;
+ bni_config_vlan(pnob, OSM_NOB(pnob)->vlan_tag,
+ OSM_NOB(pnob)->num_vlans, NULL, NULL, 0);
+}
+
+/*
+ * This function is called to program multicast
+ * address in the multicast filter of the ASIC.
+ */
+static void be_set_multicast_filter(struct net_device *netdev)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct dev_mc_list *mc_ptr;
+ struct SA_MAC_ADDRESS mac_addr[32];
+ int i;
+
+ if (netdev->flags & IFF_ALLMULTI) {
+ /* set BE in Multicast promiscuous */
+ bni_set_mc_filter(pnob, 0, TRUE, NULL, NULL, NULL);
+ return;
+ }
+
+ for (mc_ptr = netdev->mc_list, i = 0; mc_ptr;
+ mc_ptr = mc_ptr->next, i++) {
+ memcpy(mac_addr[i].bytes, mc_ptr->dmi_addr,
+ SA_MAC_ADDRESS_SIZE);
+ }
+ /* reset the promiscuous mode also. */
+ bni_set_mc_filter(pnob, i, FALSE, mac_addr, NULL, NULL);
+
+}
+
+/*
+ * This is the driver entry point to set multicast list
+ * with the device netdev. This function will be used to
+ * set promiscuous mode or multicast promiscuous mode
+ * or multicast mode....
+ */
+static void benet_set_multicast_list(struct net_device *netdev)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+
+ if (netdev->flags & IFF_PROMISC) {
+ bni_set_promisc(adapter->net_obj);
+
+ } else if (netdev->flags & IFF_ALLMULTI) {
+ bni_reset_promisc(adapter->net_obj);
+ be_set_multicast_filter(netdev);
+ } else {
+ bni_reset_promisc(adapter->net_obj);
+ be_set_multicast_filter(netdev);
+ }
+}
+
+
+/*
+ * standard entry point functions for all Linux network interface drivers
+ */
+int benet_probe(struct net_device *netdev)
+{
+ struct bni_net_object *pnob = netdev->priv;
+ struct be_adapter *adapter = OSM_NOB(pnob)->adapter;
+
+ ether_setup(netdev);
+
+ netdev->open = &benet_open;
+ netdev->stop = &benet_close;
+ netdev->hard_start_xmit = &benet_xmit;
+
+ netdev->get_stats = &benet_get_stats;
+
+ netdev->set_multicast_list = &benet_set_multicast_list;
+
+ netdev->change_mtu = &benet_change_mtu;
+ netdev->set_mac_address = &benet_set_mac_addr;
+
+ netdev->vlan_rx_register = benet_vlan_register;
+ netdev->vlan_rx_add_vid = benet_vlan_add_vid;
+ netdev->vlan_rx_kill_vid = benet_vlan_rem_vid;
+
+ netdev->features =
+ NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_RX | NETIF_F_TSO |
+ NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_FILTER | NETIF_F_IP_CSUM;
+
+ netdev->flags |= IFF_MULTICAST;
+
+ /* If device is DAC Capable, set the HIGHDMA flag for netdevice. */
+ if (adapter->dma_64bit_cap)
+ netdev->features |= NETIF_F_HIGHDMA;
+
+ SET_ETHTOOL_OPS(netdev, &be_ethtool_ops);
+ return 0;
+}
--
1.5.5
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