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be_main.c
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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.");
#define BE_VENDOR_ID 0x19a2
#define BE2_DEVICE_ID_1 0x0211
static DEFINE_PCI_DEVICE_TABLE(be_dev_ids) = {
{ PCI_DEVICE(BE_VENDOR_ID, BE2_DEVICE_ID_1) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, be_dev_ids);
static void be_queue_free(struct be_adapter *adapter, struct be_queue_info *q)
{
struct be_dma_mem *mem = &q->dma_mem;
if (mem->va)
pci_free_consistent(adapter->pdev, mem->size,
mem->va, mem->dma);
}
static int be_queue_alloc(struct be_adapter *adapter, struct be_queue_info *q,
u16 len, u16 entry_size)
{
struct be_dma_mem *mem = &q->dma_mem;
memset(q, 0, sizeof(*q));
q->len = len;
q->entry_size = entry_size;
mem->size = len * entry_size;
mem->va = pci_alloc_consistent(adapter->pdev, mem->size, &mem->dma);
if (!mem->va)
return -1;
memset(mem->va, 0, mem->size);
return 0;
}
static inline void *queue_head_node(struct be_queue_info *q)
{
return q->dma_mem.va + q->head * q->entry_size;
}
static inline void *queue_tail_node(struct be_queue_info *q)
{
return q->dma_mem.va + q->tail * q->entry_size;
}
static inline void queue_head_inc(struct be_queue_info *q)
{
index_inc(&q->head, q->len);
}
static inline void queue_tail_inc(struct be_queue_info *q)
{
index_inc(&q->tail, q->len);
}
static void be_intr_set(struct be_ctrl_info *ctrl, bool enable)
{
u8 __iomem *addr = ctrl->pcicfg + PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET;
u32 reg = ioread32(addr);
u32 enabled = reg & MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
if (!enabled && enable) {
reg |= MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
} else if (enabled && !enable) {
reg &= ~MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
} else {
printk(KERN_WARNING DRV_NAME
": bad value in membar_int_ctrl reg=0x%x\n", reg);
return;
}
iowrite32(reg, addr);
}
static void be_rxq_notify(struct be_ctrl_info *ctrl, u16 qid, u16 posted)
{
u32 val = 0;
val |= qid & DB_RQ_RING_ID_MASK;
val |= posted << DB_RQ_NUM_POSTED_SHIFT;
iowrite32(val, ctrl->db + DB_RQ_OFFSET);
}
static void be_txq_notify(struct be_ctrl_info *ctrl, u16 qid, u16 posted)
{
u32 val = 0;
val |= qid & DB_TXULP_RING_ID_MASK;
val |= (posted & DB_TXULP_NUM_POSTED_MASK) << DB_TXULP_NUM_POSTED_SHIFT;
iowrite32(val, ctrl->db + DB_TXULP1_OFFSET);
}
static void be_eq_notify(struct be_ctrl_info *ctrl, u16 qid,
bool arm, bool clear_int, u16 num_popped)
{
u32 val = 0;
val |= qid & DB_EQ_RING_ID_MASK;
if (arm)
val |= 1 << DB_EQ_REARM_SHIFT;
if (clear_int)
val |= 1 << DB_EQ_CLR_SHIFT;
val |= 1 << DB_EQ_EVNT_SHIFT;
val |= num_popped << DB_EQ_NUM_POPPED_SHIFT;
iowrite32(val, ctrl->db + DB_EQ_OFFSET);
}
static void be_cq_notify(struct be_ctrl_info *ctrl, u16 qid,
bool arm, u16 num_popped)
{
u32 val = 0;
val |= qid & DB_CQ_RING_ID_MASK;
if (arm)
val |= 1 << DB_CQ_REARM_SHIFT;
val |= num_popped << DB_CQ_NUM_POPPED_SHIFT;
iowrite32(val, ctrl->db + DB_CQ_OFFSET);
}
static int be_mac_addr_set(struct net_device *netdev, void *p)
{
struct be_adapter *adapter = netdev_priv(netdev);
struct sockaddr *addr = p;
int status = 0;
if (netif_running(netdev)) {
status = be_cmd_pmac_del(&adapter->ctrl, adapter->if_handle,
adapter->pmac_id);
if (status)
return status;
status = be_cmd_pmac_add(&adapter->ctrl, (u8 *)addr->sa_data,
adapter->if_handle, &adapter->pmac_id);
}
if (!status)
memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
return status;
}
static void netdev_stats_update(struct be_adapter *adapter)
{
struct be_hw_stats *hw_stats = hw_stats_from_cmd(adapter->stats.cmd.va);
struct be_rxf_stats *rxf_stats = &hw_stats->rxf;
struct be_port_rxf_stats *port_stats =
&rxf_stats->port[adapter->port_num];
struct net_device_stats *dev_stats = &adapter->stats.net_stats;
dev_stats->rx_packets = port_stats->rx_total_frames;
dev_stats->tx_packets = port_stats->tx_unicastframes +
port_stats->tx_multicastframes + port_stats->tx_broadcastframes;
dev_stats->rx_bytes = (u64) port_stats->rx_bytes_msd << 32 |
(u64) port_stats->rx_bytes_lsd;
dev_stats->tx_bytes = (u64) port_stats->tx_bytes_msd << 32 |
(u64) port_stats->tx_bytes_lsd;
/* bad pkts received */
dev_stats->rx_errors = port_stats->rx_crc_errors +
port_stats->rx_alignment_symbol_errors +
port_stats->rx_in_range_errors +
port_stats->rx_out_range_errors + port_stats->rx_frame_too_long;
/* packet transmit problems */
dev_stats->tx_errors = 0;
/* no space in linux buffers */
dev_stats->rx_dropped = 0;
/* no space available in linux */
dev_stats->tx_dropped = 0;
dev_stats->multicast = port_stats->tx_multicastframes;
dev_stats->collisions = 0;
/* detailed rx errors */
dev_stats->rx_length_errors = port_stats->rx_in_range_errors +
port_stats->rx_out_range_errors + port_stats->rx_frame_too_long;
/* receive ring buffer overflow */
dev_stats->rx_over_errors = 0;
dev_stats->rx_crc_errors = port_stats->rx_crc_errors;
/* frame alignment errors */
dev_stats->rx_frame_errors = port_stats->rx_alignment_symbol_errors;
/* receiver fifo overrun */
/* drops_no_pbuf is no per i/f, it's per BE card */
dev_stats->rx_fifo_errors = port_stats->rx_fifo_overflow +
port_stats->rx_input_fifo_overflow +
rxf_stats->rx_drops_no_pbuf;
/* receiver missed packetd */
dev_stats->rx_missed_errors = 0;
/* detailed tx_errors */
dev_stats->tx_aborted_errors = 0;
dev_stats->tx_carrier_errors = 0;
dev_stats->tx_fifo_errors = 0;
dev_stats->tx_heartbeat_errors = 0;
dev_stats->tx_window_errors = 0;
}
static void be_link_status_update(struct be_adapter *adapter)
{
struct be_link_info *prev = &adapter->link;
struct be_link_info now = { 0 };
struct net_device *netdev = adapter->netdev;
be_cmd_link_status_query(&adapter->ctrl, &now);
/* If link came up or went down */
if (now.speed != prev->speed && (now.speed == PHY_LINK_SPEED_ZERO ||
prev->speed == PHY_LINK_SPEED_ZERO)) {
if (now.speed == PHY_LINK_SPEED_ZERO) {
netif_stop_queue(netdev);
netif_carrier_off(netdev);
printk(KERN_INFO "%s: Link down\n", netdev->name);
} else {
netif_start_queue(netdev);
netif_carrier_on(netdev);
printk(KERN_INFO "%s: Link up\n", netdev->name);
}
}
*prev = now;
}
/* Update the EQ delay n BE based on the RX frags consumed / sec */
static void be_rx_eqd_update(struct be_adapter *adapter)
{
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 = 0;
while (skb) {
if (skb->len > skb->data_len)
cnt++;
cnt += skb_shinfo(skb)->nr_frags;
skb = skb_shinfo(skb)->frag_list;
}
/* to account for hdr wrb */
cnt++;
if (cnt & 1) {
/* add a dummy to make it an even num */
cnt++;
*dummy = true;
} else
*dummy = false;
BUG_ON(cnt > BE_MAX_TX_FRAG_COUNT);
return cnt;
}
static inline void wrb_fill(struct be_eth_wrb *wrb, u64 addr, int len)
{
wrb->frag_pa_hi = upper_32_bits(addr);
wrb->frag_pa_lo = addr & 0xFFFFFFFF;
wrb->frag_len = len & ETH_WRB_FRAG_LEN_MASK;
}
static void wrb_fill_hdr(struct be_eth_hdr_wrb *hdr, struct sk_buff *skb,
bool vlan, u32 wrb_cnt, u32 len)
{
memset(hdr, 0, sizeof(*hdr));
AMAP_SET_BITS(struct amap_eth_hdr_wrb, crc, hdr, 1);
if (skb_shinfo(skb)->gso_segs > 1 && skb_shinfo(skb)->gso_size) {
AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso, hdr, 1);
AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso_mss,
hdr, skb_shinfo(skb)->gso_size);
} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
if (is_tcp_pkt(skb))
AMAP_SET_BITS(struct amap_eth_hdr_wrb, tcpcs, hdr, 1);
else if (is_udp_pkt(skb))
AMAP_SET_BITS(struct amap_eth_hdr_wrb, udpcs, hdr, 1);
}
if (vlan && vlan_tx_tag_present(skb)) {
AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan, hdr, 1);
AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan_tag,
hdr, vlan_tx_tag_get(skb));
}
AMAP_SET_BITS(struct amap_eth_hdr_wrb, event, hdr, 1);
AMAP_SET_BITS(struct amap_eth_hdr_wrb, complete, hdr, 1);
AMAP_SET_BITS(struct amap_eth_hdr_wrb, num_wrb, hdr, wrb_cnt);
AMAP_SET_BITS(struct amap_eth_hdr_wrb, len, hdr, len);
}
static int make_tx_wrbs(struct be_adapter *adapter,
struct sk_buff *skb, u32 wrb_cnt, bool dummy_wrb)
{
u64 busaddr;
u32 i, copied = 0;
struct pci_dev *pdev = adapter->pdev;
struct sk_buff *first_skb = skb;
struct be_queue_info *txq = &adapter->tx_obj.q;
struct be_eth_wrb *wrb;
struct be_eth_hdr_wrb *hdr;
atomic_add(wrb_cnt, &txq->used);
hdr = queue_head_node(txq);
queue_head_inc(txq);
while (skb) {
if (skb->len > skb->data_len) {
int len = skb->len - skb->data_len;
busaddr = pci_map_single(pdev, skb->data, len,
PCI_DMA_TODEVICE);
wrb = queue_head_node(txq);
wrb_fill(wrb, busaddr, len);
be_dws_cpu_to_le(wrb, sizeof(*wrb));
queue_head_inc(txq);
copied += len;
}
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
struct skb_frag_struct *frag =
&skb_shinfo(skb)->frags[i];
busaddr = pci_map_page(pdev, frag->page,
frag->page_offset,
frag->size, PCI_DMA_TODEVICE);
wrb = queue_head_node(txq);
wrb_fill(wrb, busaddr, frag->size);
be_dws_cpu_to_le(wrb, sizeof(*wrb));
queue_head_inc(txq);
copied += frag->size;
}
skb = skb_shinfo(skb)->frag_list;
}
if (dummy_wrb) {
wrb = queue_head_node(txq);
wrb_fill(wrb, 0, 0);
be_dws_cpu_to_le(wrb, sizeof(*wrb));
queue_head_inc(txq);
}
wrb_fill_hdr(hdr, first_skb, adapter->vlan_grp ? true : false,
wrb_cnt, copied);
be_dws_cpu_to_le(hdr, sizeof(*hdr));
return copied;
}
static int be_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct be_adapter *adapter = netdev_priv(netdev);
struct be_tx_obj *tx_obj = &adapter->tx_obj;
struct be_queue_info *txq = &tx_obj->q;
u32 wrb_cnt = 0, copied = 0;
u32 start = txq->head;
bool dummy_wrb, stopped = false;
wrb_cnt = wrb_cnt_for_skb(skb, &dummy_wrb);
copied = make_tx_wrbs(adapter, skb, wrb_cnt, dummy_wrb);
/* record the sent skb in the sent_skb table */
BUG_ON(tx_obj->sent_skb_list[start]);
tx_obj->sent_skb_list[start] = skb;
/* Ensure that txq has space for the next skb; Else stop the queue
* *BEFORE* ringing the tx doorbell, so that we serialze the
* tx compls of the current transmit which'll wake up the queue
*/
if ((BE_MAX_TX_FRAG_COUNT + atomic_read(&txq->used)) >= txq->len) {
netif_stop_queue(netdev);
stopped = true;
}
be_txq_notify(&adapter->ctrl, txq->id, wrb_cnt);
netdev->trans_start = jiffies;
be_tx_stats_update(adapter, wrb_cnt, copied, stopped);
return NETDEV_TX_OK;
}
static int be_change_mtu(struct net_device *netdev, int new_mtu)
{
struct be_adapter *adapter = netdev_priv(netdev);
if (new_mtu < BE_MIN_MTU ||
new_mtu > BE_MAX_JUMBO_FRAME_SIZE) {
dev_info(&adapter->pdev->dev,
"MTU must be between %d and %d bytes\n",
BE_MIN_MTU, BE_MAX_JUMBO_FRAME_SIZE);
return -EINVAL;
}
dev_info(&adapter->pdev->dev, "MTU changed from %d to %d bytes\n",
netdev->mtu, new_mtu);
netdev->mtu = new_mtu;
return 0;
}
/*
* if there are BE_NUM_VLANS_SUPPORTED or lesser number of VLANS configured,
* program them in BE. If more than BE_NUM_VLANS_SUPPORTED are configured,
* set the BE in promiscuous VLAN mode.
*/
static void be_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_filter(struct net_device *netdev)
{
struct be_adapter *adapter = netdev_priv(netdev);
struct dev_mc_list *mc_ptr;
u8 mac_addr[32][ETH_ALEN];
int i = 0;
if (netdev->flags & IFF_ALLMULTI) {
/* set BE in Multicast promiscuous */
be_cmd_mcast_mac_set(&adapter->ctrl,
adapter->if_handle, NULL, 0, true);
return;
}
for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
memcpy(&mac_addr[i][0], mc_ptr->dmi_addr, ETH_ALEN);
if (++i >= 32) {
be_cmd_mcast_mac_set(&adapter->ctrl,
adapter->if_handle, &mac_addr[0][0], i, false);
i = 0;
}
}
if (i) {
/* reset the promiscuous mode also. */
be_cmd_mcast_mac_set(&adapter->ctrl,
adapter->if_handle, &mac_addr[0][0], i, false);
}
}
static void be_set_multicast_list(struct net_device *netdev)
{
struct be_adapter *adapter = netdev_priv(netdev);
if (netdev->flags & IFF_PROMISC) {
be_cmd_promiscuous_config(&adapter->ctrl, adapter->port_num, 1);
} else {
be_cmd_promiscuous_config(&adapter->ctrl, adapter->port_num, 0);
be_set_multicast_filter(netdev);
}
}
static void be_rx_rate_update(struct be_adapter *adapter)
{
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 struct be_rx_page_info *
get_rx_page_info(struct be_adapter *adapter, u16 frag_idx)
{
struct be_rx_page_info *rx_page_info;
struct be_queue_info *rxq = &adapter->rx_obj.q;
rx_page_info = &adapter->rx_obj.page_info_tbl[frag_idx];
BUG_ON(!rx_page_info->page);
if (rx_page_info->last_page_user)
pci_unmap_page(adapter->pdev, pci_unmap_addr(rx_page_info, bus),
adapter->big_page_size, PCI_DMA_FROMDEVICE);
atomic_dec(&rxq->used);
return rx_page_info;
}
/* Throwaway the data in the Rx completion */
static void be_rx_compl_discard(struct be_adapter *adapter,
struct be_eth_rx_compl *rxcp)
{
struct be_queue_info *rxq = &adapter->rx_obj.q;
struct be_rx_page_info *page_info;
u16 rxq_idx, i, num_rcvd;
rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp);
num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
for (i = 0; i < num_rcvd; i++) {
page_info = get_rx_page_info(adapter, rxq_idx);
put_page(page_info->page);
memset(page_info, 0, sizeof(*page_info));
index_inc(&rxq_idx, rxq->len);
}
}
/*
* skb_fill_rx_data forms a complete skb for an ether frame
* indicated by rxcp.
*/
static void skb_fill_rx_data(struct be_adapter *adapter,
struct sk_buff *skb, struct be_eth_rx_compl *rxcp)
{
struct be_queue_info *rxq = &adapter->rx_obj.q;
struct be_rx_page_info *page_info;
u16 rxq_idx, i, num_rcvd;
u32 pktsize, hdr_len, curr_frag_len;
u8 *start;
rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp);
pktsize = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp);
num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
page_info = get_rx_page_info(adapter, rxq_idx);
start = page_address(page_info->page) + page_info->page_offset;
prefetch(start);
/* Copy data in the first descriptor of this completion */
curr_frag_len = min(pktsize, rx_frag_size);
/* Copy the header portion into skb_data */
hdr_len = min((u32)BE_HDR_LEN, curr_frag_len);
memcpy(skb->data, start, hdr_len);
skb->len = curr_frag_len;
if (curr_frag_len <= BE_HDR_LEN) { /* tiny packet */
/* Complete packet has now been moved to data */
put_page(page_info->page);
skb->data_len = 0;
skb->tail += curr_frag_len;
} else {
skb_shinfo(skb)->nr_frags = 1;
skb_shinfo(skb)->frags[0].page = page_info->page;
skb_shinfo(skb)->frags[0].page_offset =
page_info->page_offset + hdr_len;
skb_shinfo(skb)->frags[0].size = curr_frag_len - hdr_len;
skb->data_len = curr_frag_len - hdr_len;
skb->tail += hdr_len;
}
memset(page_info, 0, sizeof(*page_info));
if (pktsize <= rx_frag_size) {
BUG_ON(num_rcvd != 1);
return;
}
/* More frags present for this completion */
pktsize -= curr_frag_len; /* account for above copied frag */
for (i = 1; i < num_rcvd; i++) {
index_inc(&rxq_idx, rxq->len);
page_info = get_rx_page_info(adapter, rxq_idx);
curr_frag_len = min(pktsize, rx_frag_size);
skb_shinfo(skb)->frags[i].page = page_info->page;
skb_shinfo(skb)->frags[i].page_offset = page_info->page_offset;
skb_shinfo(skb)->frags[i].size = curr_frag_len;
skb->len += curr_frag_len;
skb->data_len += curr_frag_len;
skb_shinfo(skb)->nr_frags++;
pktsize -= curr_frag_len;
memset(page_info, 0, sizeof(*page_info));
}
be_rx_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;
int l4_cksm;
l4_cksm = AMAP_GET_BITS(struct amap_eth_rx_compl, l4_cksm, rxcp);
vtp = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp);
skb = netdev_alloc_skb(adapter->netdev, BE_HDR_LEN + NET_IP_ALIGN);
if (!skb) {
if (net_ratelimit())
dev_warn(&adapter->pdev->dev, "skb alloc failed\n");
be_rx_compl_discard(adapter, rxcp);
return;
}
skb_reserve(skb, NET_IP_ALIGN);
skb_fill_rx_data(adapter, skb, rxcp);
if (l4_cksm && adapter->rx_csum)
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb->ip_summed = CHECKSUM_NONE;
skb->truesize = skb->len + sizeof(struct sk_buff);
skb->protocol = eth_type_trans(skb, adapter->netdev);
skb->dev = adapter->netdev;
if (vtp) {
if (!adapter->vlan_grp || adapter->num_vlans == 0) {
kfree_skb(skb);
return;
}
vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp);
vid = be16_to_cpu(vid);
vlan_hwaccel_receive_skb(skb, adapter->vlan_grp, vid);
} else {
netif_receive_skb(skb);
}
adapter->netdev->last_rx = jiffies;
return;
}
/* Process the RX completion indicated by rxcp when LRO is enabled */
static void be_rx_compl_process_lro(struct be_adapter *adapter,
struct be_eth_rx_compl *rxcp)
{
struct be_rx_page_info *page_info;
struct skb_frag_struct rx_frags[BE_MAX_FRAGS_PER_FRAME];
struct be_queue_info *rxq = &adapter->rx_obj.q;
u32 num_rcvd, pkt_size, remaining, vlanf, curr_frag_len;
u16 i, rxq_idx = 0, vid;
num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
pkt_size = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp);
vlanf = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp);
rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp);
remaining = pkt_size;
for (i = 0; i < num_rcvd; i++) {
page_info = get_rx_page_info(adapter, rxq_idx);
curr_frag_len = min(remaining, rx_frag_size);
rx_frags[i].page = page_info->page;
rx_frags[i].page_offset = page_info->page_offset;
rx_frags[i].size = curr_frag_len;
remaining -= curr_frag_len;
index_inc(&rxq_idx, rxq->len);
memset(page_info, 0, sizeof(*page_info));
}
if (likely(!vlanf)) {
lro_receive_frags(&adapter->rx_obj.lro_mgr, rx_frags, pkt_size,
pkt_size, NULL, 0);
} else {
vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp);
vid = be16_to_cpu(vid);
if (!adapter->vlan_grp || adapter->num_vlans == 0)
return;
lro_vlan_hwaccel_receive_frags(&adapter->rx_obj.lro_mgr,
rx_frags, pkt_size, pkt_size, adapter->vlan_grp,
vid, NULL, 0);
}
be_rx_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));
rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] = 0;
queue_tail_inc(&adapter->rx_obj.cq);
return rxcp;
}
static inline struct page *be_alloc_pages(u32 size)
{
gfp_t alloc_flags = GFP_ATOMIC;
u32 order = get_order(size);
if (order > 0)
alloc_flags |= __GFP_COMP;
return alloc_pages(alloc_flags, order);
}
/*
* Allocate a page, split it to fragments of size rx_frag_size and post as
* receive buffers to BE
*/
static void be_post_rx_frags(struct be_adapter *adapter)
{
struct be_rx_page_info *page_info_tbl = adapter->rx_obj.page_info_tbl;
struct be_rx_page_info *page_info = NULL;
struct be_queue_info *rxq = &adapter->rx_obj.q;
struct page *pagep = NULL;
struct be_eth_rx_d *rxd;
u64 page_dmaaddr = 0, frag_dmaaddr;
u32 posted, page_offset = 0;
page_info = &page_info_tbl[rxq->head];
for (posted = 0; posted < MAX_RX_POST && !page_info->page; posted++) {
if (!pagep) {
pagep = be_alloc_pages(adapter->big_page_size);
if (unlikely(!pagep)) {
drvr_stats(adapter)->be_ethrx_post_fail++;
break;
}
page_dmaaddr = pci_map_page(adapter->pdev, pagep, 0,
adapter->big_page_size,
PCI_DMA_FROMDEVICE);
page_info->page_offset = 0;
} else {
get_page(pagep);
page_info->page_offset = page_offset + rx_frag_size;
}
page_offset = page_info->page_offset;
page_info->page = pagep;
pci_unmap_addr_set(page_info, bus, page_dmaaddr);
frag_dmaaddr = page_dmaaddr + page_info->page_offset;
rxd = queue_head_node(rxq);
rxd->fragpa_lo = cpu_to_le32(frag_dmaaddr & 0xFFFFFFFF);
rxd->fragpa_hi = cpu_to_le32(upper_32_bits(frag_dmaaddr));
queue_head_inc(rxq);
/* Any space left in the current big page for another frag? */
if ((page_offset + rx_frag_size + rx_frag_size) >
adapter->big_page_size) {
pagep = NULL;
page_info->last_page_user = true;
}
page_info = &page_info_tbl[rxq->head];
}
if (pagep)
page_info->last_page_user = true;
if (posted) {
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_adapter *adapter)
{
struct be_queue_info *tx_cq = &adapter->tx_obj.cq;
struct be_eth_tx_compl *txcp = queue_tail_node(tx_cq);
if (txcp->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] == 0)
return NULL;
be_dws_le_to_cpu(txcp, sizeof(*txcp));
txcp->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] = 0;
queue_tail_inc(tx_cq);
return txcp;
}
static void be_tx_compl_process(struct be_adapter *adapter, u16 last_index)
{
struct be_queue_info *txq = &adapter->tx_obj.q;
struct be_eth_wrb *wrb;
struct sk_buff **sent_skbs = adapter->tx_obj.sent_skb_list;
struct sk_buff *sent_skb;
u64 busaddr;
u16 cur_index, num_wrbs = 0;
cur_index = txq->tail;
sent_skb = sent_skbs[cur_index];
BUG_ON(!sent_skb);
sent_skbs[cur_index] = NULL;
do {
cur_index = txq->tail;
wrb = queue_tail_node(txq);
be_dws_le_to_cpu(wrb, sizeof(*wrb));
busaddr = ((u64)wrb->frag_pa_hi << 32) | (u64)wrb->frag_pa_lo;
if (busaddr != 0) {
pci_unmap_single(adapter->pdev, busaddr,
wrb->frag_len, PCI_DMA_TODEVICE);
}
num_wrbs++;
queue_tail_inc(txq);
} while (cur_index != last_index);
atomic_sub(num_wrbs, &txq->used);
kfree_skb(sent_skb);
}
static void be_rx_q_clean(struct be_adapter *adapter)
{
struct be_rx_page_info *page_info;
struct be_queue_info *rxq = &adapter->rx_obj.q;
struct be_queue_info *rx_cq = &adapter->rx_obj.cq;
struct be_eth_rx_compl *rxcp;
u16 tail;
/* First cleanup pending rx completions */
while ((rxcp = be_rx_compl_get(adapter)) != NULL) {
be_rx_compl_discard(adapter, rxcp);
be_cq_notify(&adapter->ctrl, rx_cq->id, true, 1);
}
/* Then free posted rx buffer that were not used */
tail = (rxq->head + rxq->len - atomic_read(&rxq->used)) % rxq->len;
for (; tail != rxq->head; index_inc(&tail, rxq->len)) {
page_info = get_rx_page_info(adapter, tail);