// SPDX-License-Identifier: GPL-2.0
|
/*
|
* This file is based on code from OCTEON SDK by Cavium Networks.
|
*
|
* Copyright (c) 2003-2010 Cavium Networks
|
*/
|
|
#include <linux/module.h>
|
#include <linux/kernel.h>
|
#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
|
#include <linux/ip.h>
|
#include <linux/ratelimit.h>
|
#include <linux/string.h>
|
#include <linux/interrupt.h>
|
#include <net/dst.h>
|
#ifdef CONFIG_XFRM
|
#include <linux/xfrm.h>
|
#include <net/xfrm.h>
|
#endif /* CONFIG_XFRM */
|
|
#include <linux/atomic.h>
|
#include <net/sch_generic.h>
|
|
#include "octeon-ethernet.h"
|
#include "ethernet-defines.h"
|
#include "ethernet-tx.h"
|
#include "ethernet-util.h"
|
|
#define CVM_OCT_SKB_CB(skb) ((u64 *)((skb)->cb))
|
|
/*
|
* You can define GET_SKBUFF_QOS() to override how the skbuff output
|
* function determines which output queue is used. The default
|
* implementation always uses the base queue for the port. If, for
|
* example, you wanted to use the skb->priority field, define
|
* GET_SKBUFF_QOS as: #define GET_SKBUFF_QOS(skb) ((skb)->priority)
|
*/
|
#ifndef GET_SKBUFF_QOS
|
#define GET_SKBUFF_QOS(skb) 0
|
#endif
|
|
static void cvm_oct_tx_do_cleanup(unsigned long arg);
|
static DECLARE_TASKLET_OLD(cvm_oct_tx_cleanup_tasklet, cvm_oct_tx_do_cleanup);
|
|
/* Maximum number of SKBs to try to free per xmit packet. */
|
#define MAX_SKB_TO_FREE (MAX_OUT_QUEUE_DEPTH * 2)
|
|
static inline int cvm_oct_adjust_skb_to_free(int skb_to_free, int fau)
|
{
|
int undo;
|
|
undo = skb_to_free > 0 ? MAX_SKB_TO_FREE : skb_to_free +
|
MAX_SKB_TO_FREE;
|
if (undo > 0)
|
cvmx_fau_atomic_add32(fau, -undo);
|
skb_to_free = -skb_to_free > MAX_SKB_TO_FREE ? MAX_SKB_TO_FREE :
|
-skb_to_free;
|
return skb_to_free;
|
}
|
|
static void cvm_oct_kick_tx_poll_watchdog(void)
|
{
|
union cvmx_ciu_timx ciu_timx;
|
|
ciu_timx.u64 = 0;
|
ciu_timx.s.one_shot = 1;
|
ciu_timx.s.len = cvm_oct_tx_poll_interval;
|
cvmx_write_csr(CVMX_CIU_TIMX(1), ciu_timx.u64);
|
}
|
|
static void cvm_oct_free_tx_skbs(struct net_device *dev)
|
{
|
int skb_to_free;
|
int qos, queues_per_port;
|
int total_freed = 0;
|
int total_remaining = 0;
|
unsigned long flags;
|
struct octeon_ethernet *priv = netdev_priv(dev);
|
|
queues_per_port = cvmx_pko_get_num_queues(priv->port);
|
/* Drain any pending packets in the free list */
|
for (qos = 0; qos < queues_per_port; qos++) {
|
if (skb_queue_len(&priv->tx_free_list[qos]) == 0)
|
continue;
|
skb_to_free = cvmx_fau_fetch_and_add32(priv->fau + qos * 4,
|
MAX_SKB_TO_FREE);
|
skb_to_free = cvm_oct_adjust_skb_to_free(skb_to_free,
|
priv->fau + qos * 4);
|
total_freed += skb_to_free;
|
if (skb_to_free > 0) {
|
struct sk_buff *to_free_list = NULL;
|
|
spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags);
|
while (skb_to_free > 0) {
|
struct sk_buff *t;
|
|
t = __skb_dequeue(&priv->tx_free_list[qos]);
|
t->next = to_free_list;
|
to_free_list = t;
|
skb_to_free--;
|
}
|
spin_unlock_irqrestore(&priv->tx_free_list[qos].lock,
|
flags);
|
/* Do the actual freeing outside of the lock. */
|
while (to_free_list) {
|
struct sk_buff *t = to_free_list;
|
|
to_free_list = to_free_list->next;
|
dev_kfree_skb_any(t);
|
}
|
}
|
total_remaining += skb_queue_len(&priv->tx_free_list[qos]);
|
}
|
if (total_remaining < MAX_OUT_QUEUE_DEPTH && netif_queue_stopped(dev))
|
netif_wake_queue(dev);
|
if (total_remaining)
|
cvm_oct_kick_tx_poll_watchdog();
|
}
|
|
/**
|
* cvm_oct_xmit - transmit a packet
|
* @skb: Packet to send
|
* @dev: Device info structure
|
*
|
* Returns Always returns NETDEV_TX_OK
|
*/
|
int cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev)
|
{
|
union cvmx_pko_command_word0 pko_command;
|
union cvmx_buf_ptr hw_buffer;
|
u64 old_scratch;
|
u64 old_scratch2;
|
int qos;
|
int i;
|
enum {QUEUE_CORE, QUEUE_HW, QUEUE_DROP} queue_type;
|
struct octeon_ethernet *priv = netdev_priv(dev);
|
struct sk_buff *to_free_list;
|
int skb_to_free;
|
int buffers_to_free;
|
u32 total_to_clean;
|
unsigned long flags;
|
#if REUSE_SKBUFFS_WITHOUT_FREE
|
unsigned char *fpa_head;
|
#endif
|
|
/*
|
* Prefetch the private data structure. It is larger than the
|
* one cache line.
|
*/
|
prefetch(priv);
|
|
/*
|
* The check on CVMX_PKO_QUEUES_PER_PORT_* is designed to
|
* completely remove "qos" in the event neither interface
|
* supports multiple queues per port.
|
*/
|
if ((CVMX_PKO_QUEUES_PER_PORT_INTERFACE0 > 1) ||
|
(CVMX_PKO_QUEUES_PER_PORT_INTERFACE1 > 1)) {
|
qos = GET_SKBUFF_QOS(skb);
|
if (qos <= 0)
|
qos = 0;
|
else if (qos >= cvmx_pko_get_num_queues(priv->port))
|
qos = 0;
|
} else {
|
qos = 0;
|
}
|
|
if (USE_ASYNC_IOBDMA) {
|
/* Save scratch in case userspace is using it */
|
CVMX_SYNCIOBDMA;
|
old_scratch = cvmx_scratch_read64(CVMX_SCR_SCRATCH);
|
old_scratch2 = cvmx_scratch_read64(CVMX_SCR_SCRATCH + 8);
|
|
/*
|
* Fetch and increment the number of packets to be
|
* freed.
|
*/
|
cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH + 8,
|
FAU_NUM_PACKET_BUFFERS_TO_FREE,
|
0);
|
cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH,
|
priv->fau + qos * 4,
|
MAX_SKB_TO_FREE);
|
}
|
|
/*
|
* We have space for 6 segment pointers, If there will be more
|
* than that, we must linearize.
|
*/
|
if (unlikely(skb_shinfo(skb)->nr_frags > 5)) {
|
if (unlikely(__skb_linearize(skb))) {
|
queue_type = QUEUE_DROP;
|
if (USE_ASYNC_IOBDMA) {
|
/*
|
* Get the number of skbuffs in use
|
* by the hardware
|
*/
|
CVMX_SYNCIOBDMA;
|
skb_to_free =
|
cvmx_scratch_read64(CVMX_SCR_SCRATCH);
|
} else {
|
/*
|
* Get the number of skbuffs in use
|
* by the hardware
|
*/
|
skb_to_free =
|
cvmx_fau_fetch_and_add32(priv->fau +
|
qos * 4,
|
MAX_SKB_TO_FREE);
|
}
|
skb_to_free = cvm_oct_adjust_skb_to_free(skb_to_free,
|
priv->fau +
|
qos * 4);
|
spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags);
|
goto skip_xmit;
|
}
|
}
|
|
/*
|
* The CN3XXX series of parts has an errata (GMX-401) which
|
* causes the GMX block to hang if a collision occurs towards
|
* the end of a <68 byte packet. As a workaround for this, we
|
* pad packets to be 68 bytes whenever we are in half duplex
|
* mode. We don't handle the case of having a small packet but
|
* no room to add the padding. The kernel should always give
|
* us at least a cache line
|
*/
|
if ((skb->len < 64) && OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
|
union cvmx_gmxx_prtx_cfg gmx_prt_cfg;
|
int interface = INTERFACE(priv->port);
|
int index = INDEX(priv->port);
|
|
if (interface < 2) {
|
/* We only need to pad packet in half duplex mode */
|
gmx_prt_cfg.u64 =
|
cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
|
if (gmx_prt_cfg.s.duplex == 0) {
|
int add_bytes = 64 - skb->len;
|
|
if ((skb_tail_pointer(skb) + add_bytes) <=
|
skb_end_pointer(skb))
|
__skb_put_zero(skb, add_bytes);
|
}
|
}
|
}
|
|
/* Build the PKO command */
|
pko_command.u64 = 0;
|
#ifdef __LITTLE_ENDIAN
|
pko_command.s.le = 1;
|
#endif
|
pko_command.s.n2 = 1; /* Don't pollute L2 with the outgoing packet */
|
pko_command.s.segs = 1;
|
pko_command.s.total_bytes = skb->len;
|
pko_command.s.size0 = CVMX_FAU_OP_SIZE_32;
|
pko_command.s.subone0 = 1;
|
|
pko_command.s.dontfree = 1;
|
|
/* Build the PKO buffer pointer */
|
hw_buffer.u64 = 0;
|
if (skb_shinfo(skb)->nr_frags == 0) {
|
hw_buffer.s.addr = XKPHYS_TO_PHYS((uintptr_t)skb->data);
|
hw_buffer.s.pool = 0;
|
hw_buffer.s.size = skb->len;
|
} else {
|
hw_buffer.s.addr = XKPHYS_TO_PHYS((uintptr_t)skb->data);
|
hw_buffer.s.pool = 0;
|
hw_buffer.s.size = skb_headlen(skb);
|
CVM_OCT_SKB_CB(skb)[0] = hw_buffer.u64;
|
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
skb_frag_t *fs = skb_shinfo(skb)->frags + i;
|
|
hw_buffer.s.addr =
|
XKPHYS_TO_PHYS((uintptr_t)skb_frag_address(fs));
|
hw_buffer.s.size = skb_frag_size(fs);
|
CVM_OCT_SKB_CB(skb)[i + 1] = hw_buffer.u64;
|
}
|
hw_buffer.s.addr =
|
XKPHYS_TO_PHYS((uintptr_t)CVM_OCT_SKB_CB(skb));
|
hw_buffer.s.size = skb_shinfo(skb)->nr_frags + 1;
|
pko_command.s.segs = skb_shinfo(skb)->nr_frags + 1;
|
pko_command.s.gather = 1;
|
goto dont_put_skbuff_in_hw;
|
}
|
|
/*
|
* See if we can put this skb in the FPA pool. Any strange
|
* behavior from the Linux networking stack will most likely
|
* be caused by a bug in the following code. If some field is
|
* in use by the network stack and gets carried over when a
|
* buffer is reused, bad things may happen. If in doubt and
|
* you dont need the absolute best performance, disable the
|
* define REUSE_SKBUFFS_WITHOUT_FREE. The reuse of buffers has
|
* shown a 25% increase in performance under some loads.
|
*/
|
#if REUSE_SKBUFFS_WITHOUT_FREE
|
fpa_head = skb->head + 256 - ((unsigned long)skb->head & 0x7f);
|
if (unlikely(skb->data < fpa_head)) {
|
/* TX buffer beginning can't meet FPA alignment constraints */
|
goto dont_put_skbuff_in_hw;
|
}
|
if (unlikely
|
((skb_end_pointer(skb) - fpa_head) < CVMX_FPA_PACKET_POOL_SIZE)) {
|
/* TX buffer isn't large enough for the FPA */
|
goto dont_put_skbuff_in_hw;
|
}
|
if (unlikely(skb_shared(skb))) {
|
/* TX buffer sharing data with someone else */
|
goto dont_put_skbuff_in_hw;
|
}
|
if (unlikely(skb_cloned(skb))) {
|
/* TX buffer has been cloned */
|
goto dont_put_skbuff_in_hw;
|
}
|
if (unlikely(skb_header_cloned(skb))) {
|
/* TX buffer header has been cloned */
|
goto dont_put_skbuff_in_hw;
|
}
|
if (unlikely(skb->destructor)) {
|
/* TX buffer has a destructor */
|
goto dont_put_skbuff_in_hw;
|
}
|
if (unlikely(skb_shinfo(skb)->nr_frags)) {
|
/* TX buffer has fragments */
|
goto dont_put_skbuff_in_hw;
|
}
|
if (unlikely
|
(skb->truesize !=
|
sizeof(*skb) + skb_end_offset(skb))) {
|
/* TX buffer truesize has been changed */
|
goto dont_put_skbuff_in_hw;
|
}
|
|
/*
|
* We can use this buffer in the FPA. We don't need the FAU
|
* update anymore
|
*/
|
pko_command.s.dontfree = 0;
|
|
hw_buffer.s.back = ((unsigned long)skb->data >> 7) -
|
((unsigned long)fpa_head >> 7);
|
|
*(struct sk_buff **)(fpa_head - sizeof(void *)) = skb;
|
|
/*
|
* The skbuff will be reused without ever being freed. We must
|
* cleanup a bunch of core things.
|
*/
|
dst_release(skb_dst(skb));
|
skb_dst_set(skb, NULL);
|
skb_ext_reset(skb);
|
nf_reset_ct(skb);
|
skb_reset_redirect(skb);
|
|
#ifdef CONFIG_NET_SCHED
|
skb->tc_index = 0;
|
#endif /* CONFIG_NET_SCHED */
|
#endif /* REUSE_SKBUFFS_WITHOUT_FREE */
|
|
dont_put_skbuff_in_hw:
|
|
/* Check if we can use the hardware checksumming */
|
if ((skb->protocol == htons(ETH_P_IP)) &&
|
(ip_hdr(skb)->version == 4) &&
|
(ip_hdr(skb)->ihl == 5) &&
|
((ip_hdr(skb)->frag_off == 0) ||
|
(ip_hdr(skb)->frag_off == htons(1 << 14))) &&
|
((ip_hdr(skb)->protocol == IPPROTO_TCP) ||
|
(ip_hdr(skb)->protocol == IPPROTO_UDP))) {
|
/* Use hardware checksum calc */
|
pko_command.s.ipoffp1 = skb_network_offset(skb) + 1;
|
}
|
|
if (USE_ASYNC_IOBDMA) {
|
/* Get the number of skbuffs in use by the hardware */
|
CVMX_SYNCIOBDMA;
|
skb_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH);
|
buffers_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH + 8);
|
} else {
|
/* Get the number of skbuffs in use by the hardware */
|
skb_to_free = cvmx_fau_fetch_and_add32(priv->fau + qos * 4,
|
MAX_SKB_TO_FREE);
|
buffers_to_free =
|
cvmx_fau_fetch_and_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
|
}
|
|
skb_to_free = cvm_oct_adjust_skb_to_free(skb_to_free,
|
priv->fau + qos * 4);
|
|
/*
|
* If we're sending faster than the receive can free them then
|
* don't do the HW free.
|
*/
|
if ((buffers_to_free < -100) && !pko_command.s.dontfree)
|
pko_command.s.dontfree = 1;
|
|
if (pko_command.s.dontfree) {
|
queue_type = QUEUE_CORE;
|
pko_command.s.reg0 = priv->fau + qos * 4;
|
} else {
|
queue_type = QUEUE_HW;
|
}
|
if (USE_ASYNC_IOBDMA)
|
cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH,
|
FAU_TOTAL_TX_TO_CLEAN, 1);
|
|
spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags);
|
|
/* Drop this packet if we have too many already queued to the HW */
|
if (unlikely(skb_queue_len(&priv->tx_free_list[qos]) >=
|
MAX_OUT_QUEUE_DEPTH)) {
|
if (dev->tx_queue_len != 0) {
|
/* Drop the lock when notifying the core. */
|
spin_unlock_irqrestore(&priv->tx_free_list[qos].lock,
|
flags);
|
netif_stop_queue(dev);
|
spin_lock_irqsave(&priv->tx_free_list[qos].lock,
|
flags);
|
} else {
|
/* If not using normal queueing. */
|
queue_type = QUEUE_DROP;
|
goto skip_xmit;
|
}
|
}
|
|
cvmx_pko_send_packet_prepare(priv->port, priv->queue + qos,
|
CVMX_PKO_LOCK_NONE);
|
|
/* Send the packet to the output queue */
|
if (unlikely(cvmx_pko_send_packet_finish(priv->port,
|
priv->queue + qos,
|
pko_command, hw_buffer,
|
CVMX_PKO_LOCK_NONE))) {
|
printk_ratelimited("%s: Failed to send the packet\n",
|
dev->name);
|
queue_type = QUEUE_DROP;
|
}
|
skip_xmit:
|
to_free_list = NULL;
|
|
switch (queue_type) {
|
case QUEUE_DROP:
|
skb->next = to_free_list;
|
to_free_list = skb;
|
dev->stats.tx_dropped++;
|
break;
|
case QUEUE_HW:
|
cvmx_fau_atomic_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE, -1);
|
break;
|
case QUEUE_CORE:
|
__skb_queue_tail(&priv->tx_free_list[qos], skb);
|
break;
|
default:
|
BUG();
|
}
|
|
while (skb_to_free > 0) {
|
struct sk_buff *t = __skb_dequeue(&priv->tx_free_list[qos]);
|
|
t->next = to_free_list;
|
to_free_list = t;
|
skb_to_free--;
|
}
|
|
spin_unlock_irqrestore(&priv->tx_free_list[qos].lock, flags);
|
|
/* Do the actual freeing outside of the lock. */
|
while (to_free_list) {
|
struct sk_buff *t = to_free_list;
|
|
to_free_list = to_free_list->next;
|
dev_kfree_skb_any(t);
|
}
|
|
if (USE_ASYNC_IOBDMA) {
|
CVMX_SYNCIOBDMA;
|
total_to_clean = cvmx_scratch_read64(CVMX_SCR_SCRATCH);
|
/* Restore the scratch area */
|
cvmx_scratch_write64(CVMX_SCR_SCRATCH, old_scratch);
|
cvmx_scratch_write64(CVMX_SCR_SCRATCH + 8, old_scratch2);
|
} else {
|
total_to_clean =
|
cvmx_fau_fetch_and_add32(FAU_TOTAL_TX_TO_CLEAN, 1);
|
}
|
|
if (total_to_clean & 0x3ff) {
|
/*
|
* Schedule the cleanup tasklet every 1024 packets for
|
* the pathological case of high traffic on one port
|
* delaying clean up of packets on a different port
|
* that is blocked waiting for the cleanup.
|
*/
|
tasklet_schedule(&cvm_oct_tx_cleanup_tasklet);
|
}
|
|
cvm_oct_kick_tx_poll_watchdog();
|
|
return NETDEV_TX_OK;
|
}
|
|
/**
|
* cvm_oct_xmit_pow - transmit a packet to the POW
|
* @skb: Packet to send
|
* @dev: Device info structure
|
|
* Returns Always returns zero
|
*/
|
int cvm_oct_xmit_pow(struct sk_buff *skb, struct net_device *dev)
|
{
|
struct octeon_ethernet *priv = netdev_priv(dev);
|
void *packet_buffer;
|
void *copy_location;
|
|
/* Get a work queue entry */
|
struct cvmx_wqe *work = cvmx_fpa_alloc(CVMX_FPA_WQE_POOL);
|
|
if (unlikely(!work)) {
|
printk_ratelimited("%s: Failed to allocate a work queue entry\n",
|
dev->name);
|
dev->stats.tx_dropped++;
|
dev_kfree_skb_any(skb);
|
return 0;
|
}
|
|
/* Get a packet buffer */
|
packet_buffer = cvmx_fpa_alloc(CVMX_FPA_PACKET_POOL);
|
if (unlikely(!packet_buffer)) {
|
printk_ratelimited("%s: Failed to allocate a packet buffer\n",
|
dev->name);
|
cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, 1);
|
dev->stats.tx_dropped++;
|
dev_kfree_skb_any(skb);
|
return 0;
|
}
|
|
/*
|
* Calculate where we need to copy the data to. We need to
|
* leave 8 bytes for a next pointer (unused). We also need to
|
* include any configure skip. Then we need to align the IP
|
* packet src and dest into the same 64bit word. The below
|
* calculation may add a little extra, but that doesn't
|
* hurt.
|
*/
|
copy_location = packet_buffer + sizeof(u64);
|
copy_location += ((CVMX_HELPER_FIRST_MBUFF_SKIP + 7) & 0xfff8) + 6;
|
|
/*
|
* We have to copy the packet since whoever processes this
|
* packet will free it to a hardware pool. We can't use the
|
* trick of counting outstanding packets like in
|
* cvm_oct_xmit.
|
*/
|
memcpy(copy_location, skb->data, skb->len);
|
|
/*
|
* Fill in some of the work queue fields. We may need to add
|
* more if the software at the other end needs them.
|
*/
|
if (!OCTEON_IS_MODEL(OCTEON_CN68XX))
|
work->word0.pip.cn38xx.hw_chksum = skb->csum;
|
work->word1.len = skb->len;
|
cvmx_wqe_set_port(work, priv->port);
|
cvmx_wqe_set_qos(work, priv->port & 0x7);
|
cvmx_wqe_set_grp(work, pow_send_group);
|
work->word1.tag_type = CVMX_HELPER_INPUT_TAG_TYPE;
|
work->word1.tag = pow_send_group; /* FIXME */
|
/* Default to zero. Sets of zero later are commented out */
|
work->word2.u64 = 0;
|
work->word2.s.bufs = 1;
|
work->packet_ptr.u64 = 0;
|
work->packet_ptr.s.addr = cvmx_ptr_to_phys(copy_location);
|
work->packet_ptr.s.pool = CVMX_FPA_PACKET_POOL;
|
work->packet_ptr.s.size = CVMX_FPA_PACKET_POOL_SIZE;
|
work->packet_ptr.s.back = (copy_location - packet_buffer) >> 7;
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
work->word2.s.ip_offset = 14;
|
#if 0
|
work->word2.s.vlan_valid = 0; /* FIXME */
|
work->word2.s.vlan_cfi = 0; /* FIXME */
|
work->word2.s.vlan_id = 0; /* FIXME */
|
work->word2.s.dec_ipcomp = 0; /* FIXME */
|
#endif
|
work->word2.s.tcp_or_udp =
|
(ip_hdr(skb)->protocol == IPPROTO_TCP) ||
|
(ip_hdr(skb)->protocol == IPPROTO_UDP);
|
#if 0
|
/* FIXME */
|
work->word2.s.dec_ipsec = 0;
|
/* We only support IPv4 right now */
|
work->word2.s.is_v6 = 0;
|
/* Hardware would set to zero */
|
work->word2.s.software = 0;
|
/* No error, packet is internal */
|
work->word2.s.L4_error = 0;
|
#endif
|
work->word2.s.is_frag = !((ip_hdr(skb)->frag_off == 0) ||
|
(ip_hdr(skb)->frag_off ==
|
cpu_to_be16(1 << 14)));
|
#if 0
|
/* Assume Linux is sending a good packet */
|
work->word2.s.IP_exc = 0;
|
#endif
|
work->word2.s.is_bcast = (skb->pkt_type == PACKET_BROADCAST);
|
work->word2.s.is_mcast = (skb->pkt_type == PACKET_MULTICAST);
|
#if 0
|
/* This is an IP packet */
|
work->word2.s.not_IP = 0;
|
/* No error, packet is internal */
|
work->word2.s.rcv_error = 0;
|
/* No error, packet is internal */
|
work->word2.s.err_code = 0;
|
#endif
|
|
/*
|
* When copying the data, include 4 bytes of the
|
* ethernet header to align the same way hardware
|
* does.
|
*/
|
memcpy(work->packet_data, skb->data + 10,
|
sizeof(work->packet_data));
|
} else {
|
#if 0
|
work->word2.snoip.vlan_valid = 0; /* FIXME */
|
work->word2.snoip.vlan_cfi = 0; /* FIXME */
|
work->word2.snoip.vlan_id = 0; /* FIXME */
|
work->word2.snoip.software = 0; /* Hardware would set to zero */
|
#endif
|
work->word2.snoip.is_rarp = skb->protocol == htons(ETH_P_RARP);
|
work->word2.snoip.is_arp = skb->protocol == htons(ETH_P_ARP);
|
work->word2.snoip.is_bcast =
|
(skb->pkt_type == PACKET_BROADCAST);
|
work->word2.snoip.is_mcast =
|
(skb->pkt_type == PACKET_MULTICAST);
|
work->word2.snoip.not_IP = 1; /* IP was done up above */
|
#if 0
|
/* No error, packet is internal */
|
work->word2.snoip.rcv_error = 0;
|
/* No error, packet is internal */
|
work->word2.snoip.err_code = 0;
|
#endif
|
memcpy(work->packet_data, skb->data, sizeof(work->packet_data));
|
}
|
|
/* Submit the packet to the POW */
|
cvmx_pow_work_submit(work, work->word1.tag, work->word1.tag_type,
|
cvmx_wqe_get_qos(work), cvmx_wqe_get_grp(work));
|
dev->stats.tx_packets++;
|
dev->stats.tx_bytes += skb->len;
|
dev_consume_skb_any(skb);
|
return 0;
|
}
|
|
/**
|
* cvm_oct_tx_shutdown_dev - free all skb that are currently queued for TX.
|
* @dev: Device being shutdown
|
*
|
*/
|
void cvm_oct_tx_shutdown_dev(struct net_device *dev)
|
{
|
struct octeon_ethernet *priv = netdev_priv(dev);
|
unsigned long flags;
|
int qos;
|
|
for (qos = 0; qos < 16; qos++) {
|
spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags);
|
while (skb_queue_len(&priv->tx_free_list[qos]))
|
dev_kfree_skb_any(__skb_dequeue
|
(&priv->tx_free_list[qos]));
|
spin_unlock_irqrestore(&priv->tx_free_list[qos].lock, flags);
|
}
|
}
|
|
static void cvm_oct_tx_do_cleanup(unsigned long arg)
|
{
|
int port;
|
|
for (port = 0; port < TOTAL_NUMBER_OF_PORTS; port++) {
|
if (cvm_oct_device[port]) {
|
struct net_device *dev = cvm_oct_device[port];
|
|
cvm_oct_free_tx_skbs(dev);
|
}
|
}
|
}
|
|
static irqreturn_t cvm_oct_tx_cleanup_watchdog(int cpl, void *dev_id)
|
{
|
/* Disable the interrupt. */
|
cvmx_write_csr(CVMX_CIU_TIMX(1), 0);
|
/* Do the work in the tasklet. */
|
tasklet_schedule(&cvm_oct_tx_cleanup_tasklet);
|
return IRQ_HANDLED;
|
}
|
|
void cvm_oct_tx_initialize(void)
|
{
|
int i;
|
|
/* Disable the interrupt. */
|
cvmx_write_csr(CVMX_CIU_TIMX(1), 0);
|
/* Register an IRQ handler to receive CIU_TIMX(1) interrupts */
|
i = request_irq(OCTEON_IRQ_TIMER1,
|
cvm_oct_tx_cleanup_watchdog, 0,
|
"Ethernet", cvm_oct_device);
|
|
if (i)
|
panic("Could not acquire Ethernet IRQ %d\n", OCTEON_IRQ_TIMER1);
|
}
|
|
void cvm_oct_tx_shutdown(void)
|
{
|
/* Free the interrupt handler */
|
free_irq(OCTEON_IRQ_TIMER1, cvm_oct_device);
|
}
|
