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kernel-fxtec-pro1x/drivers/net/benet/be_main.c
Sathya Perla c001c213b1 be2net: fix spurious interrupt handling in intx mode 
Occasionally we may see an interrupt without an event in the eq.
In intx, we currently see the event queue and return IRQ_NONE causing
a the irq to be disabled ("no one cared".) Instead, read the CEV_ISR
reg to check the existence of the interrupt.

Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-07-03 20:09:45 -07:00

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/*
* 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"
#include <asm/div64.h>
MODULE_VERSION(DRV_VER);
MODULE_DEVICE_TABLE(pci, be_dev_ids);
MODULE_DESCRIPTION(DRV_DESC " " DRV_VER);
MODULE_AUTHOR("ServerEngines Corporation");
MODULE_LICENSE("GPL");
static unsigned int rx_frag_size = 2048;
module_param(rx_frag_size, uint, S_IRUGO);
MODULE_PARM_DESC(rx_frag_size, "Size of a fragment that holds rcvd data.");
static DEFINE_PCI_DEVICE_TABLE(be_dev_ids) = {
{ PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID1) },
{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID1) },
{ PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID2) },
{ 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 void be_intr_set(struct be_ctrl_info *ctrl, bool enable)
{
u8 __iomem *addr = ctrl->pcicfg + PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET;
u32 reg = ioread32(addr);
u32 enabled = reg & MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
if (!enabled && enable) {
reg |= MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
} else if (enabled && !enable) {
reg &= ~MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
} else {
printk(KERN_WARNING DRV_NAME
": bad value in membar_int_ctrl reg=0x%x\n", reg);
return;
}
iowrite32(reg, addr);
}
static void be_rxq_notify(struct be_ctrl_info *ctrl, u16 qid, u16 posted)
{
u32 val = 0;
val |= qid & DB_RQ_RING_ID_MASK;
val |= posted << DB_RQ_NUM_POSTED_SHIFT;
iowrite32(val, ctrl->db + DB_RQ_OFFSET);
}
static void be_txq_notify(struct be_ctrl_info *ctrl, u16 qid, u16 posted)
{
u32 val = 0;
val |= qid & DB_TXULP_RING_ID_MASK;
val |= (posted & DB_TXULP_NUM_POSTED_MASK) << DB_TXULP_NUM_POSTED_SHIFT;
iowrite32(val, ctrl->db + DB_TXULP1_OFFSET);
}
static void be_eq_notify(struct be_ctrl_info *ctrl, u16 qid,
bool arm, bool clear_int, u16 num_popped)
{
u32 val = 0;
val |= qid & DB_EQ_RING_ID_MASK;
if (arm)
val |= 1 << DB_EQ_REARM_SHIFT;
if (clear_int)
val |= 1 << DB_EQ_CLR_SHIFT;
val |= 1 << DB_EQ_EVNT_SHIFT;
val |= num_popped << DB_EQ_NUM_POPPED_SHIFT;
iowrite32(val, ctrl->db + DB_EQ_OFFSET);
}
void be_cq_notify(struct be_ctrl_info *ctrl, u16 qid,
bool arm, u16 num_popped)
{
u32 val = 0;
val |= qid & DB_CQ_RING_ID_MASK;
if (arm)
val |= 1 << DB_CQ_REARM_SHIFT;
val |= num_popped << DB_CQ_NUM_POPPED_SHIFT;
iowrite32(val, ctrl->db + DB_CQ_OFFSET);
}
static int be_mac_addr_set(struct net_device *netdev, void *p)
{
struct be_adapter *adapter = netdev_priv(netdev);
struct sockaddr *addr = p;
int status = 0;
if (netif_running(netdev)) {
status = be_cmd_pmac_del(&adapter->ctrl, adapter->if_handle,
adapter->pmac_id);
if (status)
return status;
status = be_cmd_pmac_add(&adapter->ctrl, (u8 *)addr->sa_data,
adapter->if_handle, &adapter->pmac_id);
}
if (!status)
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
return status;
}
static void netdev_stats_update(struct be_adapter *adapter)
{
struct be_hw_stats *hw_stats = hw_stats_from_cmd(adapter->stats.cmd.va);
struct be_rxf_stats *rxf_stats = &hw_stats->rxf;
struct be_port_rxf_stats *port_stats =
&rxf_stats->port[adapter->port_num];
struct net_device_stats *dev_stats = &adapter->stats.net_stats;
struct be_erx_stats *erx_stats = &hw_stats->erx;
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 +
port_stats->rx_dropped_too_small +
port_stats->rx_dropped_too_short +
port_stats->rx_dropped_header_too_small +
port_stats->rx_dropped_tcp_length +
port_stats->rx_dropped_runt +
port_stats->rx_tcp_checksum_errs +
port_stats->rx_ip_checksum_errs +
port_stats->rx_udp_checksum_errs;
/* no space in linux buffers: best possible approximation */
dev_stats->rx_dropped = erx_stats->rx_drops_no_fragments[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;
/* packet transmit problems */
dev_stats->tx_errors = 0;
/* no space available in linux */
dev_stats->tx_dropped = 0;
dev_stats->multicast = port_stats->tx_multicastframes;
dev_stats->collisions = 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;
}
void be_link_status_update(void *ctxt, bool link_up)
{
struct be_adapter *adapter = ctxt;
struct net_device *netdev = adapter->netdev;
/* If link came up or went down */
if (adapter->link_up != link_up) {
if (link_up) {
netif_start_queue(netdev);
netif_carrier_on(netdev);
printk(KERN_INFO "%s: Link up\n", netdev->name);
} else {
netif_stop_queue(netdev);
netif_carrier_off(netdev);
printk(KERN_INFO "%s: Link down\n", netdev->name);
}
adapter->link_up = link_up;
}
}
/* Update the EQ delay n BE based on the RX frags consumed / sec */
static void be_rx_eqd_update(struct be_adapter *adapter)
{
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;
ulong now = jiffies;
u32 eqd;
if (!rx_eq->enable_aic)
return;
/* Wrapped around */
if (time_before(now, stats->rx_fps_jiffies)) {
stats->rx_fps_jiffies = now;
return;
}
/* Update once a second */
if ((now - stats->rx_fps_jiffies) < HZ)
return;
stats->be_rx_fps = (stats->be_rx_frags - stats->be_prev_rx_frags) /
((now - stats->rx_fps_jiffies) / HZ);
stats->rx_fps_jiffies = now;
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 struct net_device_stats *be_get_stats(struct net_device *dev)
{
struct be_adapter *adapter = netdev_priv(dev);
return &adapter->stats.net_stats;
}
static u32 be_calc_rate(u64 bytes, unsigned long ticks)
{
u64 rate = bytes;
do_div(rate, ticks / HZ);
rate <<= 3; /* bytes/sec -> bits/sec */
do_div(rate, 1000000ul); /* MB/Sec */
return rate;
}
static void be_tx_rate_update(struct be_adapter *adapter)
{
struct be_drvr_stats *stats = drvr_stats(adapter);
ulong now = jiffies;
/* Wrapped around? */
if (time_before(now, stats->be_tx_jiffies)) {
stats->be_tx_jiffies = now;
return;
}
/* Update tx rate once in two seconds */
if ((now - stats->be_tx_jiffies) > 2 * HZ) {
stats->be_tx_rate = be_calc_rate(stats->be_tx_bytes
- stats->be_tx_bytes_prev,
now - stats->be_tx_jiffies);
stats->be_tx_jiffies = now;
stats->be_tx_bytes_prev = stats->be_tx_bytes;
}
}
static void be_tx_stats_update(struct be_adapter *adapter,
u32 wrb_cnt, u32 copied, bool stopped)
{
struct be_drvr_stats *stats = drvr_stats(adapter);
stats->be_tx_reqs++;
stats->be_tx_wrbs += wrb_cnt;
stats->be_tx_bytes += copied;
if (stopped)
stats->be_tx_stops++;
}
/* 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 = (skb->len > skb->data_len);
cnt += skb_shinfo(skb)->nr_frags;
/* 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);
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;
}
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);
be_tx_stats_update(adapter, wrb_cnt, copied, stopped);
return NETDEV_TX_OK;
}
static int be_change_mtu(struct net_device *netdev, int new_mtu)
{
struct be_adapter *adapter = netdev_priv(netdev);
if (new_mtu < BE_MIN_MTU ||
new_mtu > BE_MAX_JUMBO_FRAME_SIZE) {
dev_info(&adapter->pdev->dev,
"MTU must be between %d and %d bytes\n",
BE_MIN_MTU, BE_MAX_JUMBO_FRAME_SIZE);
return -EINVAL;
}
dev_info(&adapter->pdev->dev, "MTU changed from %d to %d bytes\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
return 0;
}
/*
* if there are BE_NUM_VLANS_SUPPORTED or lesser number of VLANS configured,
* program them in BE. If more than BE_NUM_VLANS_SUPPORTED are configured,
* set the BE in promiscuous VLAN mode.
*/
static void be_vid_config(struct net_device *netdev)
{
struct be_adapter *adapter = netdev_priv(netdev);
u16 vtag[BE_NUM_VLANS_SUPPORTED];
u16 ntags = 0, i;
if (adapter->num_vlans <= BE_NUM_VLANS_SUPPORTED) {
/* Construct VLAN Table to give to HW */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
if (adapter->vlan_tag[i]) {
vtag[ntags] = cpu_to_le16(i);
ntags++;
}
}
be_cmd_vlan_config(&adapter->ctrl, adapter->if_handle,
vtag, ntags, 1, 0);
} else {
be_cmd_vlan_config(&adapter->ctrl, adapter->if_handle,
NULL, 0, 1, 1);
}
}
static void be_vlan_register(struct net_device *netdev, struct vlan_group *grp)
{
struct be_adapter *adapter = netdev_priv(netdev);
struct be_eq_obj *rx_eq = &adapter->rx_eq;
struct be_eq_obj *tx_eq = &adapter->tx_eq;
struct be_ctrl_info *ctrl = &adapter->ctrl;
be_eq_notify(ctrl, rx_eq->q.id, false, false, 0);
be_eq_notify(ctrl, tx_eq->q.id, false, false, 0);
adapter->vlan_grp = grp;
be_eq_notify(ctrl, rx_eq->q.id, true, false, 0);
be_eq_notify(ctrl, tx_eq->q.id, true, false, 0);
}
static void be_vlan_add_vid(struct net_device *netdev, u16 vid)
{
struct be_adapter *adapter = netdev_priv(netdev);
adapter->num_vlans++;
adapter->vlan_tag[vid] = 1;
be_vid_config(netdev);
}
static void be_vlan_rem_vid(struct net_device *netdev, u16 vid)
{
struct be_adapter *adapter = netdev_priv(netdev);
adapter->num_vlans--;
adapter->vlan_tag[vid] = 0;
vlan_group_set_device(adapter->vlan_grp, vid, NULL);
be_vid_config(netdev);
}
static void be_set_multicast_list(struct net_device *netdev)
{
struct be_adapter *adapter = netdev_priv(netdev);
struct be_ctrl_info *ctrl = &adapter->ctrl;
if (netdev->flags & IFF_PROMISC) {
be_cmd_promiscuous_config(ctrl, adapter->port_num, 1);
adapter->promiscuous = true;
goto done;
}
/* BE was previously in promiscous mode; disable it */
if (adapter->promiscuous) {
adapter->promiscuous = false;
be_cmd_promiscuous_config(ctrl, adapter->port_num, 0);
}
if (netdev->flags & IFF_ALLMULTI) {
be_cmd_multicast_set(ctrl, adapter->if_handle, NULL, 0);
goto done;
}
be_cmd_multicast_set(ctrl, adapter->if_handle, netdev->mc_list,
netdev->mc_count);
done:
return;
}
static void be_rx_rate_update(struct be_adapter *adapter)
{
struct be_drvr_stats *stats = drvr_stats(adapter);
ulong now = jiffies;
/* Wrapped around */
if (time_before(now, stats->be_rx_jiffies)) {
stats->be_rx_jiffies = now;
return;
}
/* Update the rate once in two seconds */
if ((now - stats->be_rx_jiffies) < 2 * HZ)
return;
stats->be_rx_rate = be_calc_rate(stats->be_rx_bytes
- stats->be_rx_bytes_prev,
now - stats->be_rx_jiffies);
stats->be_rx_jiffies = now;
stats->be_rx_bytes_prev = stats->be_rx_bytes;
}
static void be_rx_stats_update(struct be_adapter *adapter,
u32 pktsize, u16 numfrags)
{
struct be_drvr_stats *stats = drvr_stats(adapter);
stats->be_rx_compl++;
stats->be_rx_frags += numfrags;
stats->be_rx_bytes += pktsize;
}
static inline bool do_pkt_csum(struct be_eth_rx_compl *rxcp, bool cso)
{
u8 l4_cksm, ip_version, ipcksm, tcpf = 0, udpf = 0, ipv6_chk;
l4_cksm = AMAP_GET_BITS(struct amap_eth_rx_compl, l4_cksm, rxcp);
ipcksm = AMAP_GET_BITS(struct amap_eth_rx_compl, ipcksm, rxcp);
ip_version = AMAP_GET_BITS(struct amap_eth_rx_compl, ip_version, rxcp);
if (ip_version) {
tcpf = AMAP_GET_BITS(struct amap_eth_rx_compl, tcpf, rxcp);
udpf = AMAP_GET_BITS(struct amap_eth_rx_compl, udpf, rxcp);
}
ipv6_chk = (ip_version && (tcpf || udpf));
return ((l4_cksm && ipv6_chk && ipcksm) && cso) ? false : true;
}
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, j;
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);
goto done;
}
/* More frags present for this completion */
pktsize -= curr_frag_len; /* account for above copied frag */
for (i = 1, j = 0; 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);
/* Coalesce all frags from the same physical page in one slot */
if (page_info->page_offset == 0) {
/* Fresh page */
j++;
skb_shinfo(skb)->frags[j].page = page_info->page;
skb_shinfo(skb)->frags[j].page_offset =
page_info->page_offset;
skb_shinfo(skb)->frags[j].size = 0;
skb_shinfo(skb)->nr_frags++;
} else {
put_page(page_info->page);
}
skb_shinfo(skb)->frags[j].size += curr_frag_len;
skb->len += curr_frag_len;
skb->data_len += curr_frag_len;
pktsize -= curr_frag_len;
memset(page_info, 0, sizeof(*page_info));
}
BUG_ON(j > MAX_SKB_FRAGS);
done:
be_rx_stats_update(adapter, pktsize, num_rcvd);
return;
}
/* Process the RX completion indicated by rxcp when LRO is disabled */
static void be_rx_compl_process(struct be_adapter *adapter,
struct be_eth_rx_compl *rxcp)
{
struct sk_buff *skb;
u32 vtp, vid;
vtp = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp);
skb = netdev_alloc_skb(adapter->netdev, BE_HDR_LEN + NET_IP_ALIGN);
if (!skb) {
if (net_ratelimit())
dev_warn(&adapter->pdev->dev, "skb alloc failed\n");
be_rx_compl_discard(adapter, rxcp);
return;
}
skb_reserve(skb, NET_IP_ALIGN);
skb_fill_rx_data(adapter, skb, rxcp);
if (do_pkt_csum(rxcp, adapter->rx_csum))
skb->ip_summed = CHECKSUM_NONE;
else
skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->truesize = skb->len + sizeof(struct sk_buff);
skb->protocol = eth_type_trans(skb, adapter->netdev);
skb->dev = adapter->netdev;
if (vtp) {
if (!adapter->vlan_grp || adapter->num_vlans == 0) {
kfree_skb(skb);
return;
}
vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp);
vid = be16_to_cpu(vid);
vlan_hwaccel_receive_skb(skb, adapter->vlan_grp, vid);
} else {
netif_receive_skb(skb);
}
adapter->netdev->last_rx = jiffies;
return;
}
/* Process the RX completion indicated by rxcp when LRO is enabled */
static void be_rx_compl_process_lro(struct be_adapter *adapter,
struct be_eth_rx_compl *rxcp)
{
struct be_rx_page_info *page_info;
struct skb_frag_struct rx_frags[BE_MAX_FRAGS_PER_FRAME];
struct be_queue_info *rxq = &adapter->rx_obj.q;
u32 num_rcvd, pkt_size, remaining, vlanf, curr_frag_len;
u16 i, rxq_idx = 0, vid, j;
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, j = -1; i < num_rcvd; i++) {
page_info = get_rx_page_info(adapter, rxq_idx);
curr_frag_len = min(remaining, rx_frag_size);
/* Coalesce all frags from the same physical page in one slot */
if (i == 0 || page_info->page_offset == 0) {
/* First frag or Fresh page */
j++;
rx_frags[j].page = page_info->page;
rx_frags[j].page_offset = page_info->page_offset;
rx_frags[j].size = 0;
} else {
put_page(page_info->page);
}
rx_frags[j].size += curr_frag_len;
remaining -= curr_frag_len;
index_inc(&rxq_idx, rxq->len);
memset(page_info, 0, sizeof(*page_info));
}
BUG_ON(j > MAX_SKB_FRAGS);
if (likely(!vlanf)) {
lro_receive_frags(&adapter->rx_obj.lro_mgr, rx_frags, pkt_size,
pkt_size, NULL, 0);
} else {
vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp);
vid = be16_to_cpu(vid);
if (!adapter->vlan_grp || adapter->num_vlans == 0)
return;
lro_vlan_hwaccel_receive_frags(&adapter->rx_obj.lro_mgr,
rx_frags, pkt_size, pkt_size, adapter->vlan_grp,
vid, NULL, 0);
}
be_rx_stats_update(adapter, pkt_size, num_rcvd);
return;
}
static struct be_eth_rx_compl *be_rx_compl_get(struct be_adapter *adapter)
{
struct be_eth_rx_compl *rxcp = queue_tail_node(&adapter->rx_obj.cq);
if (rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] == 0)
return NULL;
be_dws_le_to_cpu(rxcp, sizeof(*rxcp));
queue_tail_inc(&adapter->rx_obj.cq);
return rxcp;
}
/* To reset the valid bit, we need to reset the whole word as
* when walking the queue the valid entries are little-endian
* and invalid entries are host endian
*/
static inline void be_rx_compl_reset(struct be_eth_rx_compl *rxcp)
{
rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] = 0;
}
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) {
atomic_add(posted, &rxq->used);
be_rxq_notify(&adapter->ctrl, rxq->id, posted);
} else if (atomic_read(&rxq->used) == 0) {
/* Let be_worker replenish when memory is available */
adapter->rx_post_starved = true;
}
return;
}
static struct be_eth_tx_compl *be_tx_compl_get(struct be_queue_info *tx_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_rx_compl_reset(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_mcc_queues_destroy(struct be_adapter *adapter)
{
struct be_queue_info *q;
struct be_ctrl_info *ctrl = &adapter->ctrl;
q = &ctrl->mcc_obj.q;
if (q->created)
be_cmd_q_destroy(ctrl, q, QTYPE_MCCQ);
be_queue_free(adapter, q);
q = &ctrl->mcc_obj.cq;
if (q->created)
be_cmd_q_destroy(ctrl, q, QTYPE_CQ);
be_queue_free(adapter, q);
}
/* Must be called only after TX qs are created as MCC shares TX EQ */
static int be_mcc_queues_create(struct be_adapter *adapter)
{
struct be_queue_info *q, *cq;
struct be_ctrl_info *ctrl = &adapter->ctrl;
/* Alloc MCC compl queue */
cq = &ctrl->mcc_obj.cq;
if (be_queue_alloc(adapter, cq, MCC_CQ_LEN,
sizeof(struct be_mcc_cq_entry)))
goto err;
/* Ask BE to create MCC compl queue; share TX's eq */
if (be_cmd_cq_create(ctrl, cq, &adapter->tx_eq.q, false, true, 0))
goto mcc_cq_free;
/* Alloc MCC queue */
q = &ctrl->mcc_obj.q;
if (be_queue_alloc(adapter, q, MCC_Q_LEN, sizeof(struct be_mcc_wrb)))
goto mcc_cq_destroy;
/* Ask BE to create MCC queue */
if (be_cmd_mccq_create(ctrl, q, cq))
goto mcc_q_free;
return 0;
mcc_q_free:
be_queue_free(adapter, q);
mcc_cq_destroy:
be_cmd_q_destroy(ctrl, cq, QTYPE_CQ);
mcc_cq_free:
be_queue_free(adapter, cq);
err:
return -1;
}
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);
/* 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);
}
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);
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;
}
static irqreturn_t be_intx(int irq, void *dev)
{
struct be_adapter *adapter = dev;
struct be_ctrl_info *ctrl = &adapter->ctrl;
int isr;
isr = ioread32(ctrl->csr + CEV_ISR0_OFFSET +
ctrl->pci_func * CEV_ISR_SIZE);
if (!isr)
return IRQ_NONE;
event_handle(ctrl, &adapter->tx_eq);
event_handle(ctrl, &adapter->rx_eq);
return IRQ_HANDLED;
}
static irqreturn_t be_msix_rx(int irq, void *dev)
{
struct be_adapter *adapter = dev;
event_handle(&adapter->ctrl, &adapter->rx_eq);
return IRQ_HANDLED;
}
static irqreturn_t be_msix_tx_mcc(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);
be_rx_compl_reset(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;
}
void be_process_tx(struct be_adapter *adapter)
{
struct be_queue_info *txq = &adapter->tx_obj.q;
struct be_queue_info *tx_cq = &adapter->tx_obj.cq;
struct be_eth_tx_compl *txcp;
u32 num_cmpl = 0;
u16 end_idx;
while ((txcp = be_tx_compl_get(tx_cq))) {
end_idx = AMAP_GET_BITS(struct amap_eth_tx_compl,
wrb_index, txcp);
be_tx_compl_process(adapter, end_idx);
num_cmpl++;
}
if (num_cmpl) {
be_cq_notify(&adapter->ctrl, tx_cq->id, true, 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);
}
drvr_stats(adapter)->be_tx_events++;
drvr_stats(adapter)->be_tx_compl += num_cmpl;
}
}
/* As TX and MCC share the same EQ check for both TX and MCC completions.
* For TX/MCC we don't honour budget; consume everything
*/
static int be_poll_tx_mcc(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);
napi_complete(napi);
be_process_tx(adapter);
be_process_mcc(&adapter->ctrl);
return 1;
}
static void be_worker(struct work_struct *work)
{
struct be_adapter *adapter =
container_of(work, struct be_adapter, work.work);
int status;
/* 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);
be_tx_rate_update(adapter);
be_rx_rate_update(adapter);
if (adapter->rx_post_starved) {
adapter->rx_post_starved = false;
be_post_rx_frags(adapter);
}
schedule_delayed_work(&adapter->work, msecs_to_jiffies(1000));
}
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_mcc, 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(&adapter->pdev->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_err(&adapter->pdev->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;
bool link_up;
int status;
/* 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 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);
/* Rx compl queue may be in unarmed state; rearm it */
be_cq_notify(ctrl, adapter->rx_obj.cq.id, true, 0);
status = be_cmd_link_status_query(ctrl, &link_up);
if (status)
return status;
be_link_status_update(adapter, link_up);
schedule_delayed_work(&adapter->work, msecs_to_jiffies(100));
return 0;
}
static int be_setup(struct be_adapter *adapter)
{
struct be_ctrl_info *ctrl = &adapter->ctrl;
struct net_device *netdev = adapter->netdev;
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;
be_vid_config(netdev);
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;
status = be_mcc_queues_create(adapter);
if (status != 0)
goto rx_qs_destroy;
return 0;
rx_qs_destroy:
be_rx_queues_destroy(adapter);
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_clear(struct be_adapter *adapter)
{
struct be_ctrl_info *ctrl = &adapter->ctrl;
be_rx_queues_destroy(adapter);
be_tx_queues_destroy(adapter);
be_cmd_if_destroy(ctrl, adapter->if_handle);
be_mcc_queues_destroy(adapter);
return 0;
}
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_sync(&adapter->work);
netif_stop_queue(netdev);
netif_carrier_off(netdev);
adapter->link_up = false;
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);
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;
netdev->flags |= IFF_MULTICAST;
adapter->rx_csum = true;
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,
BE_NAPI_WEIGHT);
netif_napi_add(netdev, &adapter->tx_eq.napi, be_poll_tx_mcc,
BE_NAPI_WEIGHT);
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->mbox_lock);
spin_lock_init(&ctrl->mcc_lock);
spin_lock_init(&ctrl->mcc_cq_lock);
ctrl->async_cb = be_link_status_update;
ctrl->adapter_ctxt = adapter;
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_clear(adapter);
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_BIT_MASK(64));
if (!status) {
netdev->features |= NETIF_F_HIGHDMA;
} else {
status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (status) {
dev_err(&pdev->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 = be_setup(adapter);
if (status)
goto stats_clean;
status = register_netdev(netdev);
if (status != 0)
goto unsetup;
dev_info(&pdev->dev, "%s port %d\n", nic_name(pdev), adapter->port_num);
return 0;
unsetup:
be_clear(adapter);
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:
dev_err(&pdev->dev, "%s initialization failed\n", nic_name(pdev));
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);
be_clear(adapter);
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_setup(adapter);
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
" : Module param rx_frag_size must be 2048/4096/8192."
" Using 2048\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 module param rx_frag_size. Using 2048\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);
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