ec977c5b47
Many of the comments didn't follow kerneldoc guidlines. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org To: netdev@vger.kernel.org To: gregkh@suse.de Patchwork: http://patchwork.linux-mips.org/patch/971/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
724 lines
21 KiB
C
724 lines
21 KiB
C
/*********************************************************************
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* Author: Cavium Networks
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*
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* Contact: support@caviumnetworks.com
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* This file is part of the OCTEON SDK
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*
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* Copyright (c) 2003-2010 Cavium Networks
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, Version 2, as
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* published by the Free Software Foundation.
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*
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* This file is distributed in the hope that it will be useful, but
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* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
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* NONINFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* or visit http://www.gnu.org/licenses/.
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*
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* This file may also be available under a different license from Cavium.
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* Contact Cavium Networks for more information
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*********************************************************************/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/init.h>
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#include <linux/etherdevice.h>
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#include <linux/ip.h>
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#include <linux/string.h>
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#include <net/dst.h>
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#ifdef CONFIG_XFRM
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#include <linux/xfrm.h>
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#include <net/xfrm.h>
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#endif /* CONFIG_XFRM */
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#include <asm/atomic.h>
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#include <asm/octeon/octeon.h>
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#include "ethernet-defines.h"
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#include "octeon-ethernet.h"
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#include "ethernet-tx.h"
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#include "ethernet-util.h"
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#include "cvmx-wqe.h"
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#include "cvmx-fau.h"
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#include "cvmx-pip.h"
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#include "cvmx-pko.h"
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#include "cvmx-helper.h"
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#include "cvmx-gmxx-defs.h"
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#define CVM_OCT_SKB_CB(skb) ((u64 *)((skb)->cb))
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/*
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* You can define GET_SKBUFF_QOS() to override how the skbuff output
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* function determines which output queue is used. The default
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* implementation always uses the base queue for the port. If, for
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* example, you wanted to use the skb->priority fieid, define
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* GET_SKBUFF_QOS as: #define GET_SKBUFF_QOS(skb) ((skb)->priority)
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*/
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#ifndef GET_SKBUFF_QOS
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#define GET_SKBUFF_QOS(skb) 0
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#endif
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static void cvm_oct_tx_do_cleanup(unsigned long arg);
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static DECLARE_TASKLET(cvm_oct_tx_cleanup_tasklet, cvm_oct_tx_do_cleanup, 0);
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/* Maximum number of SKBs to try to free per xmit packet. */
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#define MAX_SKB_TO_FREE (MAX_OUT_QUEUE_DEPTH * 2)
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static inline int32_t cvm_oct_adjust_skb_to_free(int32_t skb_to_free, int fau)
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{
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int32_t undo;
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undo = skb_to_free > 0 ? MAX_SKB_TO_FREE : skb_to_free + MAX_SKB_TO_FREE;
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if (undo > 0)
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cvmx_fau_atomic_add32(fau, -undo);
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skb_to_free = -skb_to_free > MAX_SKB_TO_FREE ? MAX_SKB_TO_FREE : -skb_to_free;
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return skb_to_free;
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}
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static void cvm_oct_kick_tx_poll_watchdog(void)
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{
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union cvmx_ciu_timx ciu_timx;
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ciu_timx.u64 = 0;
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ciu_timx.s.one_shot = 1;
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ciu_timx.s.len = cvm_oct_tx_poll_interval;
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cvmx_write_csr(CVMX_CIU_TIMX(1), ciu_timx.u64);
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}
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void cvm_oct_free_tx_skbs(struct net_device *dev)
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{
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int32_t skb_to_free;
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int qos, queues_per_port;
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int total_freed = 0;
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int total_remaining = 0;
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unsigned long flags;
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struct octeon_ethernet *priv = netdev_priv(dev);
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queues_per_port = cvmx_pko_get_num_queues(priv->port);
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/* Drain any pending packets in the free list */
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for (qos = 0; qos < queues_per_port; qos++) {
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if (skb_queue_len(&priv->tx_free_list[qos]) == 0)
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continue;
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skb_to_free = cvmx_fau_fetch_and_add32(priv->fau+qos*4, MAX_SKB_TO_FREE);
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skb_to_free = cvm_oct_adjust_skb_to_free(skb_to_free, priv->fau+qos*4);
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total_freed += skb_to_free;
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if (skb_to_free > 0) {
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struct sk_buff *to_free_list = NULL;
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spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags);
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while (skb_to_free > 0) {
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struct sk_buff *t = __skb_dequeue(&priv->tx_free_list[qos]);
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t->next = to_free_list;
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to_free_list = t;
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skb_to_free--;
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}
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spin_unlock_irqrestore(&priv->tx_free_list[qos].lock, flags);
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/* Do the actual freeing outside of the lock. */
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while (to_free_list) {
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struct sk_buff *t = to_free_list;
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to_free_list = to_free_list->next;
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dev_kfree_skb_any(t);
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}
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}
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total_remaining += skb_queue_len(&priv->tx_free_list[qos]);
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}
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if (total_freed >= 0 && netif_queue_stopped(dev))
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netif_wake_queue(dev);
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if (total_remaining)
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cvm_oct_kick_tx_poll_watchdog();
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}
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/**
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* cvm_oct_xmit - transmit a packet
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* @skb: Packet to send
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* @dev: Device info structure
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*
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* Returns Always returns NETDEV_TX_OK
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*/
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int cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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cvmx_pko_command_word0_t pko_command;
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union cvmx_buf_ptr hw_buffer;
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uint64_t old_scratch;
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uint64_t old_scratch2;
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int qos;
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int i;
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enum {QUEUE_CORE, QUEUE_HW, QUEUE_DROP} queue_type;
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struct octeon_ethernet *priv = netdev_priv(dev);
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struct sk_buff *to_free_list;
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int32_t skb_to_free;
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int32_t buffers_to_free;
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u32 total_to_clean;
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unsigned long flags;
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#if REUSE_SKBUFFS_WITHOUT_FREE
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unsigned char *fpa_head;
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#endif
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/*
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* Prefetch the private data structure. It is larger that one
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* cache line.
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*/
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prefetch(priv);
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/*
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* The check on CVMX_PKO_QUEUES_PER_PORT_* is designed to
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* completely remove "qos" in the event neither interface
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* supports multiple queues per port.
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*/
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if ((CVMX_PKO_QUEUES_PER_PORT_INTERFACE0 > 1) ||
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(CVMX_PKO_QUEUES_PER_PORT_INTERFACE1 > 1)) {
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qos = GET_SKBUFF_QOS(skb);
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if (qos <= 0)
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qos = 0;
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else if (qos >= cvmx_pko_get_num_queues(priv->port))
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qos = 0;
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} else
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qos = 0;
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if (USE_ASYNC_IOBDMA) {
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/* Save scratch in case userspace is using it */
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CVMX_SYNCIOBDMA;
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old_scratch = cvmx_scratch_read64(CVMX_SCR_SCRATCH);
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old_scratch2 = cvmx_scratch_read64(CVMX_SCR_SCRATCH + 8);
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/*
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* Fetch and increment the number of packets to be
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* freed.
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*/
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cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH + 8,
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FAU_NUM_PACKET_BUFFERS_TO_FREE,
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0);
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cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH,
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priv->fau + qos * 4,
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MAX_SKB_TO_FREE);
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}
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/*
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* We have space for 6 segment pointers, If there will be more
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* than that, we must linearize.
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*/
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if (unlikely(skb_shinfo(skb)->nr_frags > 5)) {
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if (unlikely(__skb_linearize(skb))) {
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queue_type = QUEUE_DROP;
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if (USE_ASYNC_IOBDMA) {
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/* Get the number of skbuffs in use by the hardware */
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CVMX_SYNCIOBDMA;
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skb_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH);
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} else {
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/* Get the number of skbuffs in use by the hardware */
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skb_to_free = cvmx_fau_fetch_and_add32(priv->fau + qos * 4,
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MAX_SKB_TO_FREE);
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}
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skb_to_free = cvm_oct_adjust_skb_to_free(skb_to_free, priv->fau + qos * 4);
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spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags);
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goto skip_xmit;
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}
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}
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/*
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* The CN3XXX series of parts has an errata (GMX-401) which
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* causes the GMX block to hang if a collision occurs towards
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* the end of a <68 byte packet. As a workaround for this, we
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* pad packets to be 68 bytes whenever we are in half duplex
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* mode. We don't handle the case of having a small packet but
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* no room to add the padding. The kernel should always give
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* us at least a cache line
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*/
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if ((skb->len < 64) && OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
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union cvmx_gmxx_prtx_cfg gmx_prt_cfg;
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int interface = INTERFACE(priv->port);
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int index = INDEX(priv->port);
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if (interface < 2) {
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/* We only need to pad packet in half duplex mode */
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gmx_prt_cfg.u64 =
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cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
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if (gmx_prt_cfg.s.duplex == 0) {
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int add_bytes = 64 - skb->len;
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if ((skb_tail_pointer(skb) + add_bytes) <=
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skb_end_pointer(skb))
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memset(__skb_put(skb, add_bytes), 0,
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add_bytes);
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}
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}
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}
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/* Build the PKO command */
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pko_command.u64 = 0;
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pko_command.s.n2 = 1; /* Don't pollute L2 with the outgoing packet */
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pko_command.s.segs = 1;
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pko_command.s.total_bytes = skb->len;
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pko_command.s.size0 = CVMX_FAU_OP_SIZE_32;
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pko_command.s.subone0 = 1;
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pko_command.s.dontfree = 1;
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/* Build the PKO buffer pointer */
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hw_buffer.u64 = 0;
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if (skb_shinfo(skb)->nr_frags == 0) {
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hw_buffer.s.addr = XKPHYS_TO_PHYS((u64)skb->data);
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hw_buffer.s.pool = 0;
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hw_buffer.s.size = skb->len;
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} else {
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hw_buffer.s.addr = XKPHYS_TO_PHYS((u64)skb->data);
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hw_buffer.s.pool = 0;
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hw_buffer.s.size = skb_headlen(skb);
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CVM_OCT_SKB_CB(skb)[0] = hw_buffer.u64;
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for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
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struct skb_frag_struct *fs = skb_shinfo(skb)->frags + i;
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hw_buffer.s.addr = XKPHYS_TO_PHYS((u64)(page_address(fs->page) + fs->page_offset));
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hw_buffer.s.size = fs->size;
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CVM_OCT_SKB_CB(skb)[i + 1] = hw_buffer.u64;
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}
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hw_buffer.s.addr = XKPHYS_TO_PHYS((u64)CVM_OCT_SKB_CB(skb));
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hw_buffer.s.size = skb_shinfo(skb)->nr_frags + 1;
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pko_command.s.segs = skb_shinfo(skb)->nr_frags + 1;
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pko_command.s.gather = 1;
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goto dont_put_skbuff_in_hw;
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}
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/*
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* See if we can put this skb in the FPA pool. Any strange
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* behavior from the Linux networking stack will most likely
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* be caused by a bug in the following code. If some field is
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* in use by the network stack and get carried over when a
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* buffer is reused, bad thing may happen. If in doubt and
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* you dont need the absolute best performance, disable the
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* define REUSE_SKBUFFS_WITHOUT_FREE. The reuse of buffers has
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* shown a 25% increase in performance under some loads.
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*/
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#if REUSE_SKBUFFS_WITHOUT_FREE
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fpa_head = skb->head + 256 - ((unsigned long)skb->head & 0x7f);
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if (unlikely(skb->data < fpa_head)) {
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/*
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* printk("TX buffer beginning can't meet FPA
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* alignment constraints\n");
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*/
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goto dont_put_skbuff_in_hw;
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}
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if (unlikely
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((skb_end_pointer(skb) - fpa_head) < CVMX_FPA_PACKET_POOL_SIZE)) {
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/*
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printk("TX buffer isn't large enough for the FPA\n");
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*/
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goto dont_put_skbuff_in_hw;
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}
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if (unlikely(skb_shared(skb))) {
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/*
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printk("TX buffer sharing data with someone else\n");
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*/
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goto dont_put_skbuff_in_hw;
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}
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if (unlikely(skb_cloned(skb))) {
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/*
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printk("TX buffer has been cloned\n");
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*/
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goto dont_put_skbuff_in_hw;
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}
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if (unlikely(skb_header_cloned(skb))) {
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/*
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printk("TX buffer header has been cloned\n");
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*/
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goto dont_put_skbuff_in_hw;
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}
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if (unlikely(skb->destructor)) {
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/*
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printk("TX buffer has a destructor\n");
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*/
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goto dont_put_skbuff_in_hw;
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}
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if (unlikely(skb_shinfo(skb)->nr_frags)) {
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/*
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printk("TX buffer has fragments\n");
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*/
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goto dont_put_skbuff_in_hw;
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}
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if (unlikely
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(skb->truesize !=
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sizeof(*skb) + skb_end_pointer(skb) - skb->head)) {
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/*
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printk("TX buffer truesize has been changed\n");
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*/
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goto dont_put_skbuff_in_hw;
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}
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/*
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* We can use this buffer in the FPA. We don't need the FAU
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* update anymore
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*/
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pko_command.s.dontfree = 0;
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hw_buffer.s.back = ((unsigned long)skb->data >> 7) - ((unsigned long)fpa_head >> 7);
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*(struct sk_buff **)(fpa_head - sizeof(void *)) = skb;
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/*
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* The skbuff will be reused without ever being freed. We must
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* cleanup a bunch of core things.
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*/
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dst_release(skb_dst(skb));
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skb_dst_set(skb, NULL);
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#ifdef CONFIG_XFRM
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secpath_put(skb->sp);
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skb->sp = NULL;
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#endif
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nf_reset(skb);
|
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|
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#ifdef CONFIG_NET_SCHED
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skb->tc_index = 0;
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#ifdef CONFIG_NET_CLS_ACT
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skb->tc_verd = 0;
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#endif /* CONFIG_NET_CLS_ACT */
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#endif /* CONFIG_NET_SCHED */
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#endif /* REUSE_SKBUFFS_WITHOUT_FREE */
|
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dont_put_skbuff_in_hw:
|
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|
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/* Check if we can use the hardware checksumming */
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if (USE_HW_TCPUDP_CHECKSUM && (skb->protocol == htons(ETH_P_IP)) &&
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(ip_hdr(skb)->version == 4) && (ip_hdr(skb)->ihl == 5) &&
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((ip_hdr(skb)->frag_off == 0) || (ip_hdr(skb)->frag_off == 1 << 14))
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&& ((ip_hdr(skb)->protocol == IPPROTO_TCP)
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|| (ip_hdr(skb)->protocol == IPPROTO_UDP))) {
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/* Use hardware checksum calc */
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pko_command.s.ipoffp1 = sizeof(struct ethhdr) + 1;
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}
|
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|
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if (USE_ASYNC_IOBDMA) {
|
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/* Get the number of skbuffs in use by the hardware */
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CVMX_SYNCIOBDMA;
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skb_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH);
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buffers_to_free = cvmx_scratch_read64(CVMX_SCR_SCRATCH + 8);
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} else {
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/* Get the number of skbuffs in use by the hardware */
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skb_to_free = cvmx_fau_fetch_and_add32(priv->fau + qos * 4,
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MAX_SKB_TO_FREE);
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buffers_to_free =
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cvmx_fau_fetch_and_add32(FAU_NUM_PACKET_BUFFERS_TO_FREE, 0);
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}
|
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|
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skb_to_free = cvm_oct_adjust_skb_to_free(skb_to_free, priv->fau+qos*4);
|
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|
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/*
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* If we're sending faster than the receive can free them then
|
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* don't do the HW free.
|
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*/
|
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if ((buffers_to_free < -100) && !pko_command.s.dontfree)
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pko_command.s.dontfree = 1;
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|
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if (pko_command.s.dontfree) {
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queue_type = QUEUE_CORE;
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pko_command.s.reg0 = priv->fau+qos*4;
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} else {
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queue_type = QUEUE_HW;
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}
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if (USE_ASYNC_IOBDMA)
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cvmx_fau_async_fetch_and_add32(CVMX_SCR_SCRATCH, FAU_TOTAL_TX_TO_CLEAN, 1);
|
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|
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spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags);
|
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|
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/* 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) {
|
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/* Drop the lock when notifying the core. */
|
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spin_unlock_irqrestore(&priv->tx_free_list[qos].lock, flags);
|
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netif_stop_queue(dev);
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spin_lock_irqsave(&priv->tx_free_list[qos].lock, flags);
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} else {
|
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/* If not using normal queueing. */
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queue_type = QUEUE_DROP;
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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))) {
|
|
DEBUGPRINT("%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;
|
|
priv->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 */
|
|
cvmx_wqe_t *work = cvmx_fpa_alloc(CVMX_FPA_WQE_POOL);
|
|
if (unlikely(work == NULL)) {
|
|
DEBUGPRINT("%s: Failed to allocate a work queue entry\n",
|
|
dev->name);
|
|
priv->stats.tx_dropped++;
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
/* Get a packet buffer */
|
|
packet_buffer = cvmx_fpa_alloc(CVMX_FPA_PACKET_POOL);
|
|
if (unlikely(packet_buffer == NULL)) {
|
|
DEBUGPRINT("%s: Failed to allocate a packet buffer\n",
|
|
dev->name);
|
|
cvmx_fpa_free(work, CVMX_FPA_WQE_POOL, DONT_WRITEBACK(1));
|
|
priv->stats.tx_dropped++;
|
|
dev_kfree_skb(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(uint64_t);
|
|
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.
|
|
*/
|
|
work->hw_chksum = skb->csum;
|
|
work->len = skb->len;
|
|
work->ipprt = priv->port;
|
|
work->qos = priv->port & 0x7;
|
|
work->grp = pow_send_group;
|
|
work->tag_type = CVMX_HELPER_INPUT_TAG_TYPE;
|
|
work->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 ==
|
|
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->tag, work->tag_type, work->qos,
|
|
work->grp);
|
|
priv->stats.tx_packets++;
|
|
priv->stats.tx_bytes += skb->len;
|
|
dev_kfree_skb(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 hander for 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);
|
|
}
|