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859b1e4ec8
linux/drivers/net/benet/be_main.c
Sathya Perla 859b1e4ec8 be2net: clear & notify residual events before destroying event queues 
Any events rcvd after interrupts are disabled (in the driver unload path),
must be cleared and notified before the event queues are destroyed

Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-12 22:13:17 -07:00

2038 lines
51 KiB
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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 "be_cmds.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_adapter *adapter, bool enable)
{
u8 __iomem *addr = adapter->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
return;
iowrite32(reg, addr);
}
static void be_rxq_notify(struct be_adapter *adapter, u16 qid, u16 posted)
{
u32 val = 0;
val |= qid & DB_RQ_RING_ID_MASK;
val |= posted << DB_RQ_NUM_POSTED_SHIFT;
iowrite32(val, adapter->db + DB_RQ_OFFSET);
}
static void be_txq_notify(struct be_adapter *adapter, 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, adapter->db + DB_TXULP1_OFFSET);
}
static void be_eq_notify(struct be_adapter *adapter, 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, adapter->db + DB_EQ_OFFSET);
}
void be_cq_notify(struct be_adapter *adapter, 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, adapter->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, adapter->if_handle,
adapter->pmac_id);
if (status)
return status;
status = be_cmd_pmac_add(adapter, (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(struct be_adapter *adapter, bool link_up)
{
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_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(adapter, 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, 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, adapter->if_handle,
vtag, ntags, 1, 0);
} else {
be_cmd_vlan_config(adapter, 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;
be_eq_notify(adapter, rx_eq->q.id, false, false, 0);
be_eq_notify(adapter, tx_eq->q.id, false, false, 0);
adapter->vlan_grp = grp;
be_eq_notify(adapter, rx_eq->q.id, true, false, 0);
be_eq_notify(adapter, 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);
if (netdev->flags & IFF_PROMISC) {
be_cmd_promiscuous_config(adapter, 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(adapter, adapter->port_num, 0);
}
if (netdev->flags & IFF_ALLMULTI) {
be_cmd_multicast_set(adapter, adapter->if_handle, NULL, 0);
goto done;
}
be_cmd_multicast_set(adapter, 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, size;
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 */
size = pktsize;
for (i = 1, j = 0; i < num_rcvd; i++) {
size -= curr_frag_len;
index_inc(&rxq_idx, rxq->len);
page_info = get_rx_page_info(adapter, rxq_idx);
curr_frag_len = min(size, 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;
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 GRO 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 GRO is enabled */
static void be_rx_compl_process_gro(struct be_adapter *adapter,
struct be_eth_rx_compl *rxcp)
{
struct be_rx_page_info *page_info;
struct sk_buff *skb = NULL;
struct be_queue_info *rxq = &adapter->rx_obj.q;
struct be_eq_obj *eq_obj = &adapter->rx_eq;
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);
skb = napi_get_frags(&eq_obj->napi);
if (!skb) {
be_rx_compl_discard(adapter, rxcp);
return;
}
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++;
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;
} else {
put_page(page_info->page);
}
skb_shinfo(skb)->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);
skb_shinfo(skb)->nr_frags = j + 1;
skb->len = pkt_size;
skb->data_len = pkt_size;
skb->truesize += pkt_size;
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (likely(!vlanf)) {
napi_gro_frags(&eq_obj->napi);
} 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;
vlan_gro_frags(&eq_obj->napi, adapter->vlan_grp, vid);
}
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, 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 inline struct be_eq_entry *event_get(struct be_eq_obj *eq_obj)
{
struct be_eq_entry *eqe = queue_tail_node(&eq_obj->q);
if (!eqe->evt)
return NULL;
eqe->evt = le32_to_cpu(eqe->evt);
queue_tail_inc(&eq_obj->q);
return eqe;
}
static int event_handle(struct be_adapter *adapter,
struct be_eq_obj *eq_obj)
{
struct be_eq_entry *eqe;
u16 num = 0;
while ((eqe = event_get(eq_obj)) != NULL) {
eqe->evt = 0;
num++;
}
/* Deal with any spurious interrupts that come
* without events
*/
be_eq_notify(adapter, eq_obj->q.id, true, true, num);
if (num)
napi_schedule(&eq_obj->napi);
return num;
}
/* Just read and notify events without processing them.
* Used at the time of destroying event queues */
static void be_eq_clean(struct be_adapter *adapter,
struct be_eq_obj *eq_obj)
{
struct be_eq_entry *eqe;
u16 num = 0;
while ((eqe = event_get(eq_obj)) != NULL) {
eqe->evt = 0;
num++;
}
if (num)
be_eq_notify(adapter, eq_obj->q.id, false, true, num);
}
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, 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 (; atomic_read(&rxq->used) > 0; 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_compl_clean(struct be_adapter *adapter)
{
struct be_queue_info *tx_cq = &adapter->tx_obj.cq;
struct be_queue_info *txq = &adapter->tx_obj.q;
struct be_eth_tx_compl *txcp;
u16 end_idx, cmpl = 0, timeo = 0;
/* Wait for a max of 200ms for all the tx-completions to arrive. */
do {
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);
cmpl++;
}
if (cmpl) {
be_cq_notify(adapter, tx_cq->id, false, cmpl);
cmpl = 0;
}
if (atomic_read(&txq->used) == 0 || ++timeo > 200)
break;
mdelay(1);
} while (true);
if (atomic_read(&txq->used))
dev_err(&adapter->pdev->dev, "%d pending tx-completions\n",
atomic_read(&txq->used));
}
static void be_mcc_queues_destroy(struct be_adapter *adapter)
{
struct be_queue_info *q;
q = &adapter->mcc_obj.q;
if (q->created)
be_cmd_q_destroy(adapter, q, QTYPE_MCCQ);
be_queue_free(adapter, q);
q = &adapter->mcc_obj.cq;
if (q->created)
be_cmd_q_destroy(adapter, 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;
/* Alloc MCC compl queue */
cq = &adapter->mcc_obj.cq;
if (be_queue_alloc(adapter, cq, MCC_CQ_LEN,
sizeof(struct be_mcc_compl)))
goto err;
/* Ask BE to create MCC compl queue; share TX's eq */
if (be_cmd_cq_create(adapter, cq, &adapter->tx_eq.q, false, true, 0))
goto mcc_cq_free;
/* Alloc MCC queue */
q = &adapter->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(adapter, q, cq))
goto mcc_q_free;
return 0;
mcc_q_free:
be_queue_free(adapter, q);
mcc_cq_destroy:
be_cmd_q_destroy(adapter, 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, q, QTYPE_TXQ);
be_queue_free(adapter, q);
q = &adapter->tx_obj.cq;
if (q->created)
be_cmd_q_destroy(adapter, q, QTYPE_CQ);
be_queue_free(adapter, q);
/* Clear any residual events */
be_eq_clean(adapter, &adapter->tx_eq);
q = &adapter->tx_eq.q;
if (q->created)
be_cmd_q_destroy(adapter, 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, 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, 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, q, cq))
goto tx_q_free;
return 0;
tx_q_free:
be_queue_free(adapter, q);
tx_cq_destroy:
be_cmd_q_destroy(adapter, cq, QTYPE_CQ);
tx_cq_free:
be_queue_free(adapter, cq);
tx_eq_destroy:
be_cmd_q_destroy(adapter, 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, 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, q, QTYPE_CQ);
be_queue_free(adapter, q);
/* Clear any residual events */
be_eq_clean(adapter, &adapter->rx_eq);
q = &adapter->rx_eq.q;
if (q->created)
be_cmd_q_destroy(adapter, 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->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, 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, 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, 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, cq, QTYPE_CQ);
rx_cq_free:
be_queue_free(adapter, cq);
rx_eq_destroy:
be_cmd_q_destroy(adapter, eq, QTYPE_EQ);
rx_eq_free:
be_queue_free(adapter, eq);
return rc;
}
static irqreturn_t be_intx(int irq, void *dev)
{
struct be_adapter *adapter = dev;
int isr;
isr = ioread32(adapter->csr + CEV_ISR0_OFFSET +
be_pci_func(adapter) * CEV_ISR_SIZE);
if (!isr)
return IRQ_NONE;
event_handle(adapter, &adapter->tx_eq);
event_handle(adapter, &adapter->rx_eq);
return IRQ_HANDLED;
}
static irqreturn_t be_msix_rx(int irq, void *dev)
{
struct be_adapter *adapter = dev;
event_handle(adapter, &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, &adapter->tx_eq);
return IRQ_HANDLED;
}
static inline bool do_gro(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) ? true : false;
}
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_gro(adapter, rxcp))
be_rx_compl_process_gro(adapter, rxcp);
else
be_rx_compl_process(adapter, rxcp);
be_rx_compl_reset(rxcp);
}
/* 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, rx_cq->id, true, work_done);
} else {
/* More to be consumed; continue with interrupts disabled */
be_cq_notify(adapter, 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, 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);
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, &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 * be_pci_func(adapter)].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_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(adapter, true);
/* The evt queues are created in unarmed state; arm them */
be_eq_notify(adapter, rx_eq->q.id, true, false, 0);
be_eq_notify(adapter, tx_eq->q.id, true, false, 0);
/* Rx compl queue may be in unarmed state; rearm it */
be_cq_notify(adapter, adapter->rx_obj.cq.id, true, 0);
status = be_cmd_link_status_query(adapter, &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 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(adapter, 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(adapter, 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(adapter, adapter->if_handle);
do_none:
return status;
}
static int be_clear(struct be_adapter *adapter)
{
be_rx_queues_destroy(adapter);
be_tx_queues_destroy(adapter);
be_cmd_if_destroy(adapter, 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_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(adapter, 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);
/* Wait for all pending tx completions to arrive so that
* all tx skbs are freed.
*/
be_tx_compl_clean(adapter);
return 0;
}
static struct net_device_ops be_netdev_ops = {
.ndo_open = be_open,
.ndo_stop = be_close,
.ndo_start_xmit = be_xmit,
.ndo_get_stats = be_get_stats,
.ndo_set_rx_mode = be_set_multicast_list,
.ndo_set_mac_address = be_mac_addr_set,
.ndo_change_mtu = be_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_vlan_rx_register = be_vlan_register,
.ndo_vlan_rx_add_vid = be_vlan_add_vid,
.ndo_vlan_rx_kill_vid = be_vlan_rem_vid,
};
static void be_netdev_init(struct net_device *netdev)
{
struct be_adapter *adapter = netdev_priv(netdev);
netdev->features |= NETIF_F_SG | NETIF_F_HW_VLAN_RX | NETIF_F_TSO |
NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_FILTER | NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM | NETIF_F_GRO;
netdev->flags |= IFF_MULTICAST;
adapter->rx_csum = true;
BE_SET_NETDEV_OPS(netdev, &be_netdev_ops);
SET_ETHTOOL_OPS(netdev, &be_ethtool_ops);
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)
{
if (adapter->csr)
iounmap(adapter->csr);
if (adapter->db)
iounmap(adapter->db);
if (adapter->pcicfg)
iounmap(adapter->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->csr = addr;
addr = ioremap_nocache(pci_resource_start(adapter->pdev, 4),
128 * 1024);
if (addr == NULL)
goto pci_map_err;
adapter->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->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->mbox_mem_alloced;
be_unmap_pci_bars(adapter);
if (mem->va)
pci_free_consistent(adapter->pdev, mem->size,
mem->va, mem->dma);
}
static int be_ctrl_init(struct be_adapter *adapter)
{
struct be_dma_mem *mbox_mem_alloc = &adapter->mbox_mem_alloced;
struct be_dma_mem *mbox_mem_align = &adapter->mbox_mem;
int status;
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(&adapter->mbox_lock);
spin_lock_init(&adapter->mcc_lock);
spin_lock_init(&adapter->mcc_cq_lock);
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)
{
int status;
status = be_cmd_POST(adapter);
if (status)
return status;
status = be_cmd_get_fw_ver(adapter, adapter->fw_ver);
if (status)
return status;
status = be_cmd_query_fw_cfg(adapter, &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;
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;
}
}
status = be_ctrl_init(adapter);
if (status)
goto free_netdev;
status = be_cmd_reset_function(adapter);
if (status)
goto ctrl_clean;
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(adapter, 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;
}
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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