96555d3833
We have a howmany() macro in the <sys/param.h> header that is convenient to re-use as it makes things easier to read.
1989 lines
52 KiB
C
1989 lines
52 KiB
C
/*-
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* Copyright (c) 2010-2015 Solarflare Communications Inc.
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* All rights reserved.
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*
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* This software was developed in part by Philip Paeps under contract for
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* Solarflare Communications, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation are
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* those of the authors and should not be interpreted as representing official
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* policies, either expressed or implied, of the FreeBSD Project.
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*/
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/* Theory of operation:
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*
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* Tx queues allocation and mapping
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*
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* One Tx queue with enabled checksum offload is allocated per Rx channel
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* (event queue). Also 2 Tx queues (one without checksum offload and one
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* with IP checksum offload only) are allocated and bound to event queue 0.
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* sfxge_txq_type is used as Tx queue label.
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*
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* So, event queue plus label mapping to Tx queue index is:
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* if event queue index is 0, TxQ-index = TxQ-label * [0..SFXGE_TXQ_NTYPES)
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* else TxQ-index = SFXGE_TXQ_NTYPES + EvQ-index - 1
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* See sfxge_get_txq_by_label() sfxge_ev.c
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/smp.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/limits.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_vlan_var.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <netinet/tcp.h>
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#include "common/efx.h"
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#include "sfxge.h"
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#include "sfxge_tx.h"
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#define SFXGE_PARAM_TX_DPL_GET_MAX SFXGE_PARAM(tx_dpl_get_max)
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static int sfxge_tx_dpl_get_max = SFXGE_TX_DPL_GET_PKT_LIMIT_DEFAULT;
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TUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_MAX, &sfxge_tx_dpl_get_max);
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SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_max, CTLFLAG_RDTUN,
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&sfxge_tx_dpl_get_max, 0,
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"Maximum number of any packets in deferred packet get-list");
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#define SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX \
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SFXGE_PARAM(tx_dpl_get_non_tcp_max)
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static int sfxge_tx_dpl_get_non_tcp_max =
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SFXGE_TX_DPL_GET_NON_TCP_PKT_LIMIT_DEFAULT;
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TUNABLE_INT(SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX, &sfxge_tx_dpl_get_non_tcp_max);
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SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_get_non_tcp_max, CTLFLAG_RDTUN,
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&sfxge_tx_dpl_get_non_tcp_max, 0,
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"Maximum number of non-TCP packets in deferred packet get-list");
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#define SFXGE_PARAM_TX_DPL_PUT_MAX SFXGE_PARAM(tx_dpl_put_max)
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static int sfxge_tx_dpl_put_max = SFXGE_TX_DPL_PUT_PKT_LIMIT_DEFAULT;
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TUNABLE_INT(SFXGE_PARAM_TX_DPL_PUT_MAX, &sfxge_tx_dpl_put_max);
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SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_dpl_put_max, CTLFLAG_RDTUN,
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&sfxge_tx_dpl_put_max, 0,
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"Maximum number of any packets in deferred packet put-list");
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#define SFXGE_PARAM_TSO_FW_ASSISTED SFXGE_PARAM(tso_fw_assisted)
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static int sfxge_tso_fw_assisted = (SFXGE_FATSOV1 | SFXGE_FATSOV2);
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TUNABLE_INT(SFXGE_PARAM_TSO_FW_ASSISTED, &sfxge_tso_fw_assisted);
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SYSCTL_INT(_hw_sfxge, OID_AUTO, tso_fw_assisted, CTLFLAG_RDTUN,
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&sfxge_tso_fw_assisted, 0,
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"Bitmask of FW-assisted TSO allowed to use if supported by NIC firmware");
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static const struct {
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const char *name;
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size_t offset;
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} sfxge_tx_stats[] = {
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#define SFXGE_TX_STAT(name, member) \
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{ #name, offsetof(struct sfxge_txq, member) }
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SFXGE_TX_STAT(tso_bursts, tso_bursts),
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SFXGE_TX_STAT(tso_packets, tso_packets),
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SFXGE_TX_STAT(tso_long_headers, tso_long_headers),
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SFXGE_TX_STAT(tso_pdrop_too_many, tso_pdrop_too_many),
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SFXGE_TX_STAT(tso_pdrop_no_rsrc, tso_pdrop_no_rsrc),
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SFXGE_TX_STAT(tx_collapses, collapses),
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SFXGE_TX_STAT(tx_drops, drops),
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SFXGE_TX_STAT(tx_get_overflow, get_overflow),
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SFXGE_TX_STAT(tx_get_non_tcp_overflow, get_non_tcp_overflow),
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SFXGE_TX_STAT(tx_put_overflow, put_overflow),
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SFXGE_TX_STAT(tx_netdown_drops, netdown_drops),
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};
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/* Forward declarations. */
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static void sfxge_tx_qdpl_service(struct sfxge_txq *txq);
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static void sfxge_tx_qlist_post(struct sfxge_txq *txq);
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static void sfxge_tx_qunblock(struct sfxge_txq *txq);
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static int sfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf,
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const bus_dma_segment_t *dma_seg, int n_dma_seg,
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int vlan_tagged);
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static int
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sfxge_tx_maybe_insert_tag(struct sfxge_txq *txq, struct mbuf *mbuf)
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{
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uint16_t this_tag = ((mbuf->m_flags & M_VLANTAG) ?
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mbuf->m_pkthdr.ether_vtag :
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0);
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if (this_tag == txq->hw_vlan_tci)
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return (0);
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efx_tx_qdesc_vlantci_create(txq->common,
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bswap16(this_tag),
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&txq->pend_desc[0]);
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txq->n_pend_desc = 1;
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txq->hw_vlan_tci = this_tag;
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return (1);
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}
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static inline void
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sfxge_next_stmp(struct sfxge_txq *txq, struct sfxge_tx_mapping **pstmp)
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{
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KASSERT((*pstmp)->flags == 0, ("stmp flags are not 0"));
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if (__predict_false(*pstmp ==
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&txq->stmp[txq->ptr_mask]))
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*pstmp = &txq->stmp[0];
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else
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(*pstmp)++;
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}
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void
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sfxge_tx_qcomplete(struct sfxge_txq *txq, struct sfxge_evq *evq)
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{
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unsigned int completed;
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SFXGE_EVQ_LOCK_ASSERT_OWNED(evq);
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completed = txq->completed;
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while (completed != txq->pending) {
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struct sfxge_tx_mapping *stmp;
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unsigned int id;
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id = completed++ & txq->ptr_mask;
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stmp = &txq->stmp[id];
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if (stmp->flags & TX_BUF_UNMAP) {
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bus_dmamap_unload(txq->packet_dma_tag, stmp->map);
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if (stmp->flags & TX_BUF_MBUF) {
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struct mbuf *m = stmp->u.mbuf;
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do
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m = m_free(m);
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while (m != NULL);
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} else {
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free(stmp->u.heap_buf, M_SFXGE);
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}
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stmp->flags = 0;
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}
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}
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txq->completed = completed;
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/* Check whether we need to unblock the queue. */
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mb();
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if (txq->blocked) {
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unsigned int level;
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level = txq->added - txq->completed;
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if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries))
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sfxge_tx_qunblock(txq);
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}
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}
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static unsigned int
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sfxge_is_mbuf_non_tcp(struct mbuf *mbuf)
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{
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/* Absense of TCP checksum flags does not mean that it is non-TCP
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* but it should be true if user wants to achieve high throughput.
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*/
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return (!(mbuf->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_IP6_TCP)));
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}
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/*
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* Reorder the put list and append it to the get list.
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*/
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static void
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sfxge_tx_qdpl_swizzle(struct sfxge_txq *txq)
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{
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struct sfxge_tx_dpl *stdp;
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struct mbuf *mbuf, *get_next, **get_tailp;
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volatile uintptr_t *putp;
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uintptr_t put;
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unsigned int count;
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unsigned int non_tcp_count;
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SFXGE_TXQ_LOCK_ASSERT_OWNED(txq);
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stdp = &txq->dpl;
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/* Acquire the put list. */
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putp = &stdp->std_put;
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put = atomic_readandclear_ptr(putp);
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mbuf = (void *)put;
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if (mbuf == NULL)
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return;
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/* Reverse the put list. */
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get_tailp = &mbuf->m_nextpkt;
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get_next = NULL;
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count = 0;
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non_tcp_count = 0;
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do {
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struct mbuf *put_next;
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non_tcp_count += sfxge_is_mbuf_non_tcp(mbuf);
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put_next = mbuf->m_nextpkt;
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mbuf->m_nextpkt = get_next;
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get_next = mbuf;
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mbuf = put_next;
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count++;
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} while (mbuf != NULL);
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if (count > stdp->std_put_hiwat)
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stdp->std_put_hiwat = count;
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/* Append the reversed put list to the get list. */
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KASSERT(*get_tailp == NULL, ("*get_tailp != NULL"));
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*stdp->std_getp = get_next;
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stdp->std_getp = get_tailp;
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stdp->std_get_count += count;
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stdp->std_get_non_tcp_count += non_tcp_count;
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}
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static void
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sfxge_tx_qreap(struct sfxge_txq *txq)
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{
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SFXGE_TXQ_LOCK_ASSERT_OWNED(txq);
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txq->reaped = txq->completed;
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}
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static void
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sfxge_tx_qlist_post(struct sfxge_txq *txq)
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{
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unsigned int old_added;
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unsigned int block_level;
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unsigned int level;
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int rc;
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SFXGE_TXQ_LOCK_ASSERT_OWNED(txq);
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KASSERT(txq->n_pend_desc != 0, ("txq->n_pend_desc == 0"));
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KASSERT(txq->n_pend_desc <= txq->max_pkt_desc,
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("txq->n_pend_desc too large"));
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KASSERT(!txq->blocked, ("txq->blocked"));
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old_added = txq->added;
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/* Post the fragment list. */
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rc = efx_tx_qdesc_post(txq->common, txq->pend_desc, txq->n_pend_desc,
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txq->reaped, &txq->added);
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KASSERT(rc == 0, ("efx_tx_qdesc_post() failed"));
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/* If efx_tx_qdesc_post() had to refragment, our information about
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* buffers to free may be associated with the wrong
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* descriptors.
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*/
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KASSERT(txq->added - old_added == txq->n_pend_desc,
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("efx_tx_qdesc_post() refragmented descriptors"));
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level = txq->added - txq->reaped;
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KASSERT(level <= txq->entries, ("overfilled TX queue"));
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/* Clear the fragment list. */
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txq->n_pend_desc = 0;
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/*
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* Set the block level to ensure there is space to generate a
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* large number of descriptors for TSO.
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*/
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block_level = EFX_TXQ_LIMIT(txq->entries) - txq->max_pkt_desc;
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/* Have we reached the block level? */
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if (level < block_level)
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return;
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/* Reap, and check again */
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sfxge_tx_qreap(txq);
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level = txq->added - txq->reaped;
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if (level < block_level)
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return;
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txq->blocked = 1;
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/*
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* Avoid a race with completion interrupt handling that could leave
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* the queue blocked.
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*/
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mb();
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sfxge_tx_qreap(txq);
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level = txq->added - txq->reaped;
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if (level < block_level) {
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mb();
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txq->blocked = 0;
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}
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}
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static int sfxge_tx_queue_mbuf(struct sfxge_txq *txq, struct mbuf *mbuf)
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{
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bus_dmamap_t *used_map;
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bus_dmamap_t map;
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bus_dma_segment_t dma_seg[SFXGE_TX_MAPPING_MAX_SEG];
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unsigned int id;
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struct sfxge_tx_mapping *stmp;
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efx_desc_t *desc;
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int n_dma_seg;
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int rc;
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int i;
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int eop;
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int vlan_tagged;
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KASSERT(!txq->blocked, ("txq->blocked"));
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if (mbuf->m_pkthdr.csum_flags & CSUM_TSO)
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prefetch_read_many(mbuf->m_data);
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if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED)) {
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rc = EINTR;
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goto reject;
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}
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/* Load the packet for DMA. */
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id = txq->added & txq->ptr_mask;
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stmp = &txq->stmp[id];
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rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag, stmp->map,
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mbuf, dma_seg, &n_dma_seg, 0);
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if (rc == EFBIG) {
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/* Try again. */
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struct mbuf *new_mbuf = m_collapse(mbuf, M_NOWAIT,
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SFXGE_TX_MAPPING_MAX_SEG);
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if (new_mbuf == NULL)
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goto reject;
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++txq->collapses;
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mbuf = new_mbuf;
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rc = bus_dmamap_load_mbuf_sg(txq->packet_dma_tag,
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stmp->map, mbuf,
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dma_seg, &n_dma_seg, 0);
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}
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if (rc != 0)
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goto reject;
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/* Make the packet visible to the hardware. */
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bus_dmamap_sync(txq->packet_dma_tag, stmp->map, BUS_DMASYNC_PREWRITE);
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used_map = &stmp->map;
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vlan_tagged = sfxge_tx_maybe_insert_tag(txq, mbuf);
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if (vlan_tagged) {
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sfxge_next_stmp(txq, &stmp);
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}
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if (mbuf->m_pkthdr.csum_flags & CSUM_TSO) {
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rc = sfxge_tx_queue_tso(txq, mbuf, dma_seg, n_dma_seg, vlan_tagged);
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if (rc < 0)
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goto reject_mapped;
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stmp = &txq->stmp[(rc - 1) & txq->ptr_mask];
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} else {
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/* Add the mapping to the fragment list, and set flags
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* for the buffer.
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*/
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i = 0;
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for (;;) {
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desc = &txq->pend_desc[i + vlan_tagged];
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eop = (i == n_dma_seg - 1);
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efx_tx_qdesc_dma_create(txq->common,
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dma_seg[i].ds_addr,
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dma_seg[i].ds_len,
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eop,
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desc);
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if (eop)
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break;
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i++;
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sfxge_next_stmp(txq, &stmp);
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}
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txq->n_pend_desc = n_dma_seg + vlan_tagged;
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}
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/*
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* If the mapping required more than one descriptor
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* then we need to associate the DMA map with the last
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* descriptor, not the first.
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*/
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if (used_map != &stmp->map) {
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map = stmp->map;
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stmp->map = *used_map;
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*used_map = map;
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}
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stmp->u.mbuf = mbuf;
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stmp->flags = TX_BUF_UNMAP | TX_BUF_MBUF;
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/* Post the fragment list. */
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sfxge_tx_qlist_post(txq);
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return (0);
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reject_mapped:
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bus_dmamap_unload(txq->packet_dma_tag, *used_map);
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reject:
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/* Drop the packet on the floor. */
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m_freem(mbuf);
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++txq->drops;
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return (rc);
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}
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/*
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* Drain the deferred packet list into the transmit queue.
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*/
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static void
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sfxge_tx_qdpl_drain(struct sfxge_txq *txq)
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{
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struct sfxge_softc *sc;
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struct sfxge_tx_dpl *stdp;
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struct mbuf *mbuf, *next;
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unsigned int count;
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unsigned int non_tcp_count;
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unsigned int pushed;
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int rc;
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|
|
SFXGE_TXQ_LOCK_ASSERT_OWNED(txq);
|
|
|
|
sc = txq->sc;
|
|
stdp = &txq->dpl;
|
|
pushed = txq->added;
|
|
|
|
if (__predict_true(txq->init_state == SFXGE_TXQ_STARTED)) {
|
|
prefetch_read_many(sc->enp);
|
|
prefetch_read_many(txq->common);
|
|
}
|
|
|
|
mbuf = stdp->std_get;
|
|
count = stdp->std_get_count;
|
|
non_tcp_count = stdp->std_get_non_tcp_count;
|
|
|
|
if (count > stdp->std_get_hiwat)
|
|
stdp->std_get_hiwat = count;
|
|
|
|
while (count != 0) {
|
|
KASSERT(mbuf != NULL, ("mbuf == NULL"));
|
|
|
|
next = mbuf->m_nextpkt;
|
|
mbuf->m_nextpkt = NULL;
|
|
|
|
ETHER_BPF_MTAP(sc->ifnet, mbuf); /* packet capture */
|
|
|
|
if (next != NULL)
|
|
prefetch_read_many(next);
|
|
|
|
rc = sfxge_tx_queue_mbuf(txq, mbuf);
|
|
--count;
|
|
non_tcp_count -= sfxge_is_mbuf_non_tcp(mbuf);
|
|
mbuf = next;
|
|
if (rc != 0)
|
|
continue;
|
|
|
|
if (txq->blocked)
|
|
break;
|
|
|
|
/* Push the fragments to the hardware in batches. */
|
|
if (txq->added - pushed >= SFXGE_TX_BATCH) {
|
|
efx_tx_qpush(txq->common, txq->added, pushed);
|
|
pushed = txq->added;
|
|
}
|
|
}
|
|
|
|
if (count == 0) {
|
|
KASSERT(mbuf == NULL, ("mbuf != NULL"));
|
|
KASSERT(non_tcp_count == 0,
|
|
("inconsistent TCP/non-TCP detection"));
|
|
stdp->std_get = NULL;
|
|
stdp->std_get_count = 0;
|
|
stdp->std_get_non_tcp_count = 0;
|
|
stdp->std_getp = &stdp->std_get;
|
|
} else {
|
|
stdp->std_get = mbuf;
|
|
stdp->std_get_count = count;
|
|
stdp->std_get_non_tcp_count = non_tcp_count;
|
|
}
|
|
|
|
if (txq->added != pushed)
|
|
efx_tx_qpush(txq->common, txq->added, pushed);
|
|
|
|
KASSERT(txq->blocked || stdp->std_get_count == 0,
|
|
("queue unblocked but count is non-zero"));
|
|
}
|
|
|
|
#define SFXGE_TX_QDPL_PENDING(_txq) ((_txq)->dpl.std_put != 0)
|
|
|
|
/*
|
|
* Service the deferred packet list.
|
|
*
|
|
* NOTE: drops the txq mutex!
|
|
*/
|
|
static void
|
|
sfxge_tx_qdpl_service(struct sfxge_txq *txq)
|
|
{
|
|
SFXGE_TXQ_LOCK_ASSERT_OWNED(txq);
|
|
|
|
do {
|
|
if (SFXGE_TX_QDPL_PENDING(txq))
|
|
sfxge_tx_qdpl_swizzle(txq);
|
|
|
|
if (!txq->blocked)
|
|
sfxge_tx_qdpl_drain(txq);
|
|
|
|
SFXGE_TXQ_UNLOCK(txq);
|
|
} while (SFXGE_TX_QDPL_PENDING(txq) &&
|
|
SFXGE_TXQ_TRYLOCK(txq));
|
|
}
|
|
|
|
/*
|
|
* Put a packet on the deferred packet get-list.
|
|
*/
|
|
static int
|
|
sfxge_tx_qdpl_put_locked(struct sfxge_txq *txq, struct mbuf *mbuf)
|
|
{
|
|
struct sfxge_tx_dpl *stdp;
|
|
|
|
stdp = &txq->dpl;
|
|
|
|
KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL"));
|
|
|
|
SFXGE_TXQ_LOCK_ASSERT_OWNED(txq);
|
|
|
|
if (stdp->std_get_count >= stdp->std_get_max) {
|
|
txq->get_overflow++;
|
|
return (ENOBUFS);
|
|
}
|
|
if (sfxge_is_mbuf_non_tcp(mbuf)) {
|
|
if (stdp->std_get_non_tcp_count >=
|
|
stdp->std_get_non_tcp_max) {
|
|
txq->get_non_tcp_overflow++;
|
|
return (ENOBUFS);
|
|
}
|
|
stdp->std_get_non_tcp_count++;
|
|
}
|
|
|
|
*(stdp->std_getp) = mbuf;
|
|
stdp->std_getp = &mbuf->m_nextpkt;
|
|
stdp->std_get_count++;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Put a packet on the deferred packet put-list.
|
|
*
|
|
* We overload the csum_data field in the mbuf to keep track of this length
|
|
* because there is no cheap alternative to avoid races.
|
|
*/
|
|
static int
|
|
sfxge_tx_qdpl_put_unlocked(struct sfxge_txq *txq, struct mbuf *mbuf)
|
|
{
|
|
struct sfxge_tx_dpl *stdp;
|
|
volatile uintptr_t *putp;
|
|
uintptr_t old;
|
|
uintptr_t new;
|
|
unsigned old_len;
|
|
|
|
KASSERT(mbuf->m_nextpkt == NULL, ("mbuf->m_nextpkt != NULL"));
|
|
|
|
SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(txq);
|
|
|
|
stdp = &txq->dpl;
|
|
putp = &stdp->std_put;
|
|
new = (uintptr_t)mbuf;
|
|
|
|
do {
|
|
old = *putp;
|
|
if (old != 0) {
|
|
struct mbuf *mp = (struct mbuf *)old;
|
|
old_len = mp->m_pkthdr.csum_data;
|
|
} else
|
|
old_len = 0;
|
|
if (old_len >= stdp->std_put_max) {
|
|
atomic_add_long(&txq->put_overflow, 1);
|
|
return (ENOBUFS);
|
|
}
|
|
mbuf->m_pkthdr.csum_data = old_len + 1;
|
|
mbuf->m_nextpkt = (void *)old;
|
|
} while (atomic_cmpset_ptr(putp, old, new) == 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Called from if_transmit - will try to grab the txq lock and enqueue to the
|
|
* put list if it succeeds, otherwise try to push onto the defer list if space.
|
|
*/
|
|
static int
|
|
sfxge_tx_packet_add(struct sfxge_txq *txq, struct mbuf *m)
|
|
{
|
|
int rc;
|
|
|
|
if (!SFXGE_LINK_UP(txq->sc)) {
|
|
atomic_add_long(&txq->netdown_drops, 1);
|
|
return (ENETDOWN);
|
|
}
|
|
|
|
/*
|
|
* Try to grab the txq lock. If we are able to get the lock,
|
|
* the packet will be appended to the "get list" of the deferred
|
|
* packet list. Otherwise, it will be pushed on the "put list".
|
|
*/
|
|
if (SFXGE_TXQ_TRYLOCK(txq)) {
|
|
/* First swizzle put-list to get-list to keep order */
|
|
sfxge_tx_qdpl_swizzle(txq);
|
|
|
|
rc = sfxge_tx_qdpl_put_locked(txq, m);
|
|
|
|
/* Try to service the list. */
|
|
sfxge_tx_qdpl_service(txq);
|
|
/* Lock has been dropped. */
|
|
} else {
|
|
rc = sfxge_tx_qdpl_put_unlocked(txq, m);
|
|
|
|
/*
|
|
* Try to grab the lock again.
|
|
*
|
|
* If we are able to get the lock, we need to process
|
|
* the deferred packet list. If we are not able to get
|
|
* the lock, another thread is processing the list.
|
|
*/
|
|
if ((rc == 0) && SFXGE_TXQ_TRYLOCK(txq)) {
|
|
sfxge_tx_qdpl_service(txq);
|
|
/* Lock has been dropped. */
|
|
}
|
|
}
|
|
|
|
SFXGE_TXQ_LOCK_ASSERT_NOTOWNED(txq);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static void
|
|
sfxge_tx_qdpl_flush(struct sfxge_txq *txq)
|
|
{
|
|
struct sfxge_tx_dpl *stdp = &txq->dpl;
|
|
struct mbuf *mbuf, *next;
|
|
|
|
SFXGE_TXQ_LOCK(txq);
|
|
|
|
sfxge_tx_qdpl_swizzle(txq);
|
|
for (mbuf = stdp->std_get; mbuf != NULL; mbuf = next) {
|
|
next = mbuf->m_nextpkt;
|
|
m_freem(mbuf);
|
|
}
|
|
stdp->std_get = NULL;
|
|
stdp->std_get_count = 0;
|
|
stdp->std_get_non_tcp_count = 0;
|
|
stdp->std_getp = &stdp->std_get;
|
|
|
|
SFXGE_TXQ_UNLOCK(txq);
|
|
}
|
|
|
|
void
|
|
sfxge_if_qflush(struct ifnet *ifp)
|
|
{
|
|
struct sfxge_softc *sc;
|
|
unsigned int i;
|
|
|
|
sc = ifp->if_softc;
|
|
|
|
for (i = 0; i < sc->txq_count; i++)
|
|
sfxge_tx_qdpl_flush(sc->txq[i]);
|
|
}
|
|
|
|
#if SFXGE_TX_PARSE_EARLY
|
|
|
|
/* There is little space for user data in mbuf pkthdr, so we
|
|
* use l*hlen fields which are not used by the driver otherwise
|
|
* to store header offsets.
|
|
* The fields are 8-bit, but it's ok, no header may be longer than 255 bytes.
|
|
*/
|
|
|
|
|
|
#define TSO_MBUF_PROTO(_mbuf) ((_mbuf)->m_pkthdr.PH_loc.sixteen[0])
|
|
/* We abuse l5hlen here because PH_loc can hold only 64 bits of data */
|
|
#define TSO_MBUF_FLAGS(_mbuf) ((_mbuf)->m_pkthdr.l5hlen)
|
|
#define TSO_MBUF_PACKETID(_mbuf) ((_mbuf)->m_pkthdr.PH_loc.sixteen[1])
|
|
#define TSO_MBUF_SEQNUM(_mbuf) ((_mbuf)->m_pkthdr.PH_loc.thirtytwo[1])
|
|
|
|
static void sfxge_parse_tx_packet(struct mbuf *mbuf)
|
|
{
|
|
struct ether_header *eh = mtod(mbuf, struct ether_header *);
|
|
const struct tcphdr *th;
|
|
struct tcphdr th_copy;
|
|
|
|
/* Find network protocol and header */
|
|
TSO_MBUF_PROTO(mbuf) = eh->ether_type;
|
|
if (TSO_MBUF_PROTO(mbuf) == htons(ETHERTYPE_VLAN)) {
|
|
struct ether_vlan_header *veh =
|
|
mtod(mbuf, struct ether_vlan_header *);
|
|
TSO_MBUF_PROTO(mbuf) = veh->evl_proto;
|
|
mbuf->m_pkthdr.l2hlen = sizeof(*veh);
|
|
} else {
|
|
mbuf->m_pkthdr.l2hlen = sizeof(*eh);
|
|
}
|
|
|
|
/* Find TCP header */
|
|
if (TSO_MBUF_PROTO(mbuf) == htons(ETHERTYPE_IP)) {
|
|
const struct ip *iph = (const struct ip *)mtodo(mbuf, mbuf->m_pkthdr.l2hlen);
|
|
|
|
KASSERT(iph->ip_p == IPPROTO_TCP,
|
|
("TSO required on non-TCP packet"));
|
|
mbuf->m_pkthdr.l3hlen = mbuf->m_pkthdr.l2hlen + 4 * iph->ip_hl;
|
|
TSO_MBUF_PACKETID(mbuf) = iph->ip_id;
|
|
} else {
|
|
KASSERT(TSO_MBUF_PROTO(mbuf) == htons(ETHERTYPE_IPV6),
|
|
("TSO required on non-IP packet"));
|
|
KASSERT(((const struct ip6_hdr *)mtodo(mbuf, mbuf->m_pkthdr.l2hlen))->ip6_nxt ==
|
|
IPPROTO_TCP,
|
|
("TSO required on non-TCP packet"));
|
|
mbuf->m_pkthdr.l3hlen = mbuf->m_pkthdr.l2hlen + sizeof(struct ip6_hdr);
|
|
TSO_MBUF_PACKETID(mbuf) = 0;
|
|
}
|
|
|
|
KASSERT(mbuf->m_len >= mbuf->m_pkthdr.l3hlen,
|
|
("network header is fragmented in mbuf"));
|
|
|
|
/* We need TCP header including flags (window is the next) */
|
|
if (mbuf->m_len < mbuf->m_pkthdr.l3hlen + offsetof(struct tcphdr, th_win)) {
|
|
m_copydata(mbuf, mbuf->m_pkthdr.l3hlen, sizeof(th_copy),
|
|
(caddr_t)&th_copy);
|
|
th = &th_copy;
|
|
} else {
|
|
th = (const struct tcphdr *)mtodo(mbuf, mbuf->m_pkthdr.l3hlen);
|
|
}
|
|
|
|
mbuf->m_pkthdr.l4hlen = mbuf->m_pkthdr.l3hlen + 4 * th->th_off;
|
|
TSO_MBUF_SEQNUM(mbuf) = ntohl(th->th_seq);
|
|
|
|
/* These flags must not be duplicated */
|
|
/*
|
|
* RST should not be duplicated as well, but FreeBSD kernel
|
|
* generates TSO packets with RST flag. So, do not assert
|
|
* its absence.
|
|
*/
|
|
KASSERT(!(th->th_flags & (TH_URG | TH_SYN)),
|
|
("incompatible TCP flag 0x%x on TSO packet",
|
|
th->th_flags & (TH_URG | TH_SYN)));
|
|
TSO_MBUF_FLAGS(mbuf) = th->th_flags;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* TX start -- called by the stack.
|
|
*/
|
|
int
|
|
sfxge_if_transmit(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct sfxge_softc *sc;
|
|
struct sfxge_txq *txq;
|
|
int rc;
|
|
|
|
sc = (struct sfxge_softc *)ifp->if_softc;
|
|
|
|
/*
|
|
* Transmit may be called when interface is up from the kernel
|
|
* point of view, but not yet up (in progress) from the driver
|
|
* point of view. I.e. link aggregation bring up.
|
|
* Transmit may be called when interface is up from the driver
|
|
* point of view, but already down from the kernel point of
|
|
* view. I.e. Rx when interface shutdown is in progress.
|
|
*/
|
|
KASSERT((ifp->if_flags & IFF_UP) || (sc->if_flags & IFF_UP),
|
|
("interface not up"));
|
|
|
|
/* Pick the desired transmit queue. */
|
|
if (m->m_pkthdr.csum_flags &
|
|
(CSUM_DELAY_DATA | CSUM_TCP_IPV6 | CSUM_UDP_IPV6 | CSUM_TSO)) {
|
|
int index = 0;
|
|
|
|
/* check if flowid is set */
|
|
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
|
|
uint32_t hash = m->m_pkthdr.flowid;
|
|
|
|
index = sc->rx_indir_table[hash % SFXGE_RX_SCALE_MAX];
|
|
}
|
|
#if SFXGE_TX_PARSE_EARLY
|
|
if (m->m_pkthdr.csum_flags & CSUM_TSO)
|
|
sfxge_parse_tx_packet(m);
|
|
#endif
|
|
txq = sc->txq[SFXGE_TXQ_IP_TCP_UDP_CKSUM + index];
|
|
} else if (m->m_pkthdr.csum_flags & CSUM_DELAY_IP) {
|
|
txq = sc->txq[SFXGE_TXQ_IP_CKSUM];
|
|
} else {
|
|
txq = sc->txq[SFXGE_TXQ_NON_CKSUM];
|
|
}
|
|
|
|
rc = sfxge_tx_packet_add(txq, m);
|
|
if (rc != 0)
|
|
m_freem(m);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
/*
|
|
* Software "TSO". Not quite as good as doing it in hardware, but
|
|
* still faster than segmenting in the stack.
|
|
*/
|
|
|
|
struct sfxge_tso_state {
|
|
/* Output position */
|
|
unsigned out_len; /* Remaining length in current segment */
|
|
unsigned seqnum; /* Current sequence number */
|
|
unsigned packet_space; /* Remaining space in current packet */
|
|
unsigned segs_space; /* Remaining number of DMA segments
|
|
for the packet (FATSOv2 only) */
|
|
|
|
/* Input position */
|
|
uint64_t dma_addr; /* DMA address of current position */
|
|
unsigned in_len; /* Remaining length in current mbuf */
|
|
|
|
const struct mbuf *mbuf; /* Input mbuf (head of chain) */
|
|
u_short protocol; /* Network protocol (after VLAN decap) */
|
|
ssize_t nh_off; /* Offset of network header */
|
|
ssize_t tcph_off; /* Offset of TCP header */
|
|
unsigned header_len; /* Number of bytes of header */
|
|
unsigned seg_size; /* TCP segment size */
|
|
int fw_assisted; /* Use FW-assisted TSO */
|
|
u_short packet_id; /* IPv4 packet ID from the original packet */
|
|
uint8_t tcp_flags; /* TCP flags */
|
|
efx_desc_t header_desc; /* Precomputed header descriptor for
|
|
* FW-assisted TSO */
|
|
};
|
|
|
|
#if !SFXGE_TX_PARSE_EARLY
|
|
static const struct ip *tso_iph(const struct sfxge_tso_state *tso)
|
|
{
|
|
KASSERT(tso->protocol == htons(ETHERTYPE_IP),
|
|
("tso_iph() in non-IPv4 state"));
|
|
return (const struct ip *)(tso->mbuf->m_data + tso->nh_off);
|
|
}
|
|
|
|
static __unused const struct ip6_hdr *tso_ip6h(const struct sfxge_tso_state *tso)
|
|
{
|
|
KASSERT(tso->protocol == htons(ETHERTYPE_IPV6),
|
|
("tso_ip6h() in non-IPv6 state"));
|
|
return (const struct ip6_hdr *)(tso->mbuf->m_data + tso->nh_off);
|
|
}
|
|
|
|
static const struct tcphdr *tso_tcph(const struct sfxge_tso_state *tso)
|
|
{
|
|
return (const struct tcphdr *)(tso->mbuf->m_data + tso->tcph_off);
|
|
}
|
|
#endif
|
|
|
|
|
|
/* Size of preallocated TSO header buffers. Larger blocks must be
|
|
* allocated from the heap.
|
|
*/
|
|
#define TSOH_STD_SIZE 128
|
|
|
|
/* At most half the descriptors in the queue at any time will refer to
|
|
* a TSO header buffer, since they must always be followed by a
|
|
* payload descriptor referring to an mbuf.
|
|
*/
|
|
#define TSOH_COUNT(_txq_entries) ((_txq_entries) / 2u)
|
|
#define TSOH_PER_PAGE (PAGE_SIZE / TSOH_STD_SIZE)
|
|
#define TSOH_PAGE_COUNT(_txq_entries) \
|
|
howmany(TSOH_COUNT(_txq_entries), TSOH_PER_PAGE)
|
|
|
|
static int tso_init(struct sfxge_txq *txq)
|
|
{
|
|
struct sfxge_softc *sc = txq->sc;
|
|
unsigned int tsoh_page_count = TSOH_PAGE_COUNT(sc->txq_entries);
|
|
int i, rc;
|
|
|
|
/* Allocate TSO header buffers */
|
|
txq->tsoh_buffer = malloc(tsoh_page_count * sizeof(txq->tsoh_buffer[0]),
|
|
M_SFXGE, M_WAITOK);
|
|
|
|
for (i = 0; i < tsoh_page_count; i++) {
|
|
rc = sfxge_dma_alloc(sc, PAGE_SIZE, &txq->tsoh_buffer[i]);
|
|
if (rc != 0)
|
|
goto fail;
|
|
}
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
while (i-- > 0)
|
|
sfxge_dma_free(&txq->tsoh_buffer[i]);
|
|
free(txq->tsoh_buffer, M_SFXGE);
|
|
txq->tsoh_buffer = NULL;
|
|
return (rc);
|
|
}
|
|
|
|
static void tso_fini(struct sfxge_txq *txq)
|
|
{
|
|
int i;
|
|
|
|
if (txq->tsoh_buffer != NULL) {
|
|
for (i = 0; i < TSOH_PAGE_COUNT(txq->sc->txq_entries); i++)
|
|
sfxge_dma_free(&txq->tsoh_buffer[i]);
|
|
free(txq->tsoh_buffer, M_SFXGE);
|
|
}
|
|
}
|
|
|
|
static void tso_start(struct sfxge_txq *txq, struct sfxge_tso_state *tso,
|
|
const bus_dma_segment_t *hdr_dma_seg,
|
|
struct mbuf *mbuf)
|
|
{
|
|
const efx_nic_cfg_t *encp = efx_nic_cfg_get(txq->sc->enp);
|
|
#if !SFXGE_TX_PARSE_EARLY
|
|
struct ether_header *eh = mtod(mbuf, struct ether_header *);
|
|
const struct tcphdr *th;
|
|
struct tcphdr th_copy;
|
|
#endif
|
|
|
|
tso->fw_assisted = txq->tso_fw_assisted;
|
|
tso->mbuf = mbuf;
|
|
|
|
/* Find network protocol and header */
|
|
#if !SFXGE_TX_PARSE_EARLY
|
|
tso->protocol = eh->ether_type;
|
|
if (tso->protocol == htons(ETHERTYPE_VLAN)) {
|
|
struct ether_vlan_header *veh =
|
|
mtod(mbuf, struct ether_vlan_header *);
|
|
tso->protocol = veh->evl_proto;
|
|
tso->nh_off = sizeof(*veh);
|
|
} else {
|
|
tso->nh_off = sizeof(*eh);
|
|
}
|
|
#else
|
|
tso->protocol = TSO_MBUF_PROTO(mbuf);
|
|
tso->nh_off = mbuf->m_pkthdr.l2hlen;
|
|
tso->tcph_off = mbuf->m_pkthdr.l3hlen;
|
|
tso->packet_id = TSO_MBUF_PACKETID(mbuf);
|
|
#endif
|
|
|
|
#if !SFXGE_TX_PARSE_EARLY
|
|
/* Find TCP header */
|
|
if (tso->protocol == htons(ETHERTYPE_IP)) {
|
|
KASSERT(tso_iph(tso)->ip_p == IPPROTO_TCP,
|
|
("TSO required on non-TCP packet"));
|
|
tso->tcph_off = tso->nh_off + 4 * tso_iph(tso)->ip_hl;
|
|
tso->packet_id = tso_iph(tso)->ip_id;
|
|
} else {
|
|
KASSERT(tso->protocol == htons(ETHERTYPE_IPV6),
|
|
("TSO required on non-IP packet"));
|
|
KASSERT(tso_ip6h(tso)->ip6_nxt == IPPROTO_TCP,
|
|
("TSO required on non-TCP packet"));
|
|
tso->tcph_off = tso->nh_off + sizeof(struct ip6_hdr);
|
|
tso->packet_id = 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
if (tso->fw_assisted &&
|
|
__predict_false(tso->tcph_off >
|
|
encp->enc_tx_tso_tcp_header_offset_limit)) {
|
|
tso->fw_assisted = 0;
|
|
}
|
|
|
|
|
|
#if !SFXGE_TX_PARSE_EARLY
|
|
KASSERT(mbuf->m_len >= tso->tcph_off,
|
|
("network header is fragmented in mbuf"));
|
|
/* We need TCP header including flags (window is the next) */
|
|
if (mbuf->m_len < tso->tcph_off + offsetof(struct tcphdr, th_win)) {
|
|
m_copydata(tso->mbuf, tso->tcph_off, sizeof(th_copy),
|
|
(caddr_t)&th_copy);
|
|
th = &th_copy;
|
|
} else {
|
|
th = tso_tcph(tso);
|
|
}
|
|
tso->header_len = tso->tcph_off + 4 * th->th_off;
|
|
#else
|
|
tso->header_len = mbuf->m_pkthdr.l4hlen;
|
|
#endif
|
|
tso->seg_size = mbuf->m_pkthdr.tso_segsz;
|
|
|
|
#if !SFXGE_TX_PARSE_EARLY
|
|
tso->seqnum = ntohl(th->th_seq);
|
|
|
|
/* These flags must not be duplicated */
|
|
/*
|
|
* RST should not be duplicated as well, but FreeBSD kernel
|
|
* generates TSO packets with RST flag. So, do not assert
|
|
* its absence.
|
|
*/
|
|
KASSERT(!(th->th_flags & (TH_URG | TH_SYN)),
|
|
("incompatible TCP flag 0x%x on TSO packet",
|
|
th->th_flags & (TH_URG | TH_SYN)));
|
|
tso->tcp_flags = th->th_flags;
|
|
#else
|
|
tso->seqnum = TSO_MBUF_SEQNUM(mbuf);
|
|
tso->tcp_flags = TSO_MBUF_FLAGS(mbuf);
|
|
#endif
|
|
|
|
tso->out_len = mbuf->m_pkthdr.len - tso->header_len;
|
|
|
|
if (tso->fw_assisted) {
|
|
if (hdr_dma_seg->ds_len >= tso->header_len)
|
|
efx_tx_qdesc_dma_create(txq->common,
|
|
hdr_dma_seg->ds_addr,
|
|
tso->header_len,
|
|
B_FALSE,
|
|
&tso->header_desc);
|
|
else
|
|
tso->fw_assisted = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* tso_fill_packet_with_fragment - form descriptors for the current fragment
|
|
*
|
|
* Form descriptors for the current fragment, until we reach the end
|
|
* of fragment or end-of-packet. Return 0 on success, 1 if not enough
|
|
* space.
|
|
*/
|
|
static void tso_fill_packet_with_fragment(struct sfxge_txq *txq,
|
|
struct sfxge_tso_state *tso)
|
|
{
|
|
efx_desc_t *desc;
|
|
int n;
|
|
uint64_t dma_addr = tso->dma_addr;
|
|
boolean_t eop;
|
|
|
|
if (tso->in_len == 0 || tso->packet_space == 0)
|
|
return;
|
|
|
|
KASSERT(tso->in_len > 0, ("TSO input length went negative"));
|
|
KASSERT(tso->packet_space > 0, ("TSO packet space went negative"));
|
|
|
|
if (tso->fw_assisted & SFXGE_FATSOV2) {
|
|
n = tso->in_len;
|
|
tso->out_len -= n;
|
|
tso->seqnum += n;
|
|
tso->in_len = 0;
|
|
if (n < tso->packet_space) {
|
|
tso->packet_space -= n;
|
|
tso->segs_space--;
|
|
} else {
|
|
tso->packet_space = tso->seg_size -
|
|
(n - tso->packet_space) % tso->seg_size;
|
|
tso->segs_space =
|
|
EFX_TX_FATSOV2_DMA_SEGS_PER_PKT_MAX - 1 -
|
|
(tso->packet_space != tso->seg_size);
|
|
}
|
|
} else {
|
|
n = min(tso->in_len, tso->packet_space);
|
|
tso->packet_space -= n;
|
|
tso->out_len -= n;
|
|
tso->dma_addr += n;
|
|
tso->in_len -= n;
|
|
}
|
|
|
|
/*
|
|
* It is OK to use binary OR below to avoid extra branching
|
|
* since all conditions may always be checked.
|
|
*/
|
|
eop = (tso->out_len == 0) | (tso->packet_space == 0) |
|
|
(tso->segs_space == 0);
|
|
|
|
desc = &txq->pend_desc[txq->n_pend_desc++];
|
|
efx_tx_qdesc_dma_create(txq->common, dma_addr, n, eop, desc);
|
|
}
|
|
|
|
/* Callback from bus_dmamap_load() for long TSO headers. */
|
|
static void tso_map_long_header(void *dma_addr_ret,
|
|
bus_dma_segment_t *segs, int nseg,
|
|
int error)
|
|
{
|
|
*(uint64_t *)dma_addr_ret = ((__predict_true(error == 0) &&
|
|
__predict_true(nseg == 1)) ?
|
|
segs->ds_addr : 0);
|
|
}
|
|
|
|
/*
|
|
* tso_start_new_packet - generate a new header and prepare for the new packet
|
|
*
|
|
* Generate a new header and prepare for the new packet. Return 0 on
|
|
* success, or an error code if failed to alloc header.
|
|
*/
|
|
static int tso_start_new_packet(struct sfxge_txq *txq,
|
|
struct sfxge_tso_state *tso,
|
|
unsigned int *idp)
|
|
{
|
|
unsigned int id = *idp;
|
|
struct tcphdr *tsoh_th;
|
|
unsigned ip_length;
|
|
caddr_t header;
|
|
uint64_t dma_addr;
|
|
bus_dmamap_t map;
|
|
efx_desc_t *desc;
|
|
int rc;
|
|
|
|
if (tso->fw_assisted) {
|
|
if (tso->fw_assisted & SFXGE_FATSOV2) {
|
|
/* Add 2 FATSOv2 option descriptors */
|
|
desc = &txq->pend_desc[txq->n_pend_desc];
|
|
efx_tx_qdesc_tso2_create(txq->common,
|
|
tso->packet_id,
|
|
tso->seqnum,
|
|
tso->seg_size,
|
|
desc,
|
|
EFX_TX_FATSOV2_OPT_NDESCS);
|
|
desc += EFX_TX_FATSOV2_OPT_NDESCS;
|
|
txq->n_pend_desc += EFX_TX_FATSOV2_OPT_NDESCS;
|
|
KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0"));
|
|
id = (id + EFX_TX_FATSOV2_OPT_NDESCS) & txq->ptr_mask;
|
|
|
|
tso->segs_space =
|
|
EFX_TX_FATSOV2_DMA_SEGS_PER_PKT_MAX - 1;
|
|
} else {
|
|
uint8_t tcp_flags = tso->tcp_flags;
|
|
|
|
if (tso->out_len > tso->seg_size)
|
|
tcp_flags &= ~(TH_FIN | TH_PUSH);
|
|
|
|
/* Add FATSOv1 option descriptor */
|
|
desc = &txq->pend_desc[txq->n_pend_desc++];
|
|
efx_tx_qdesc_tso_create(txq->common,
|
|
tso->packet_id,
|
|
tso->seqnum,
|
|
tcp_flags,
|
|
desc++);
|
|
KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0"));
|
|
id = (id + 1) & txq->ptr_mask;
|
|
|
|
tso->seqnum += tso->seg_size;
|
|
tso->segs_space = UINT_MAX;
|
|
}
|
|
|
|
/* Header DMA descriptor */
|
|
*desc = tso->header_desc;
|
|
txq->n_pend_desc++;
|
|
KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0"));
|
|
id = (id + 1) & txq->ptr_mask;
|
|
} else {
|
|
/* Allocate a DMA-mapped header buffer. */
|
|
if (__predict_true(tso->header_len <= TSOH_STD_SIZE)) {
|
|
unsigned int page_index = (id / 2) / TSOH_PER_PAGE;
|
|
unsigned int buf_index = (id / 2) % TSOH_PER_PAGE;
|
|
|
|
header = (txq->tsoh_buffer[page_index].esm_base +
|
|
buf_index * TSOH_STD_SIZE);
|
|
dma_addr = (txq->tsoh_buffer[page_index].esm_addr +
|
|
buf_index * TSOH_STD_SIZE);
|
|
map = txq->tsoh_buffer[page_index].esm_map;
|
|
|
|
KASSERT(txq->stmp[id].flags == 0,
|
|
("stmp flags are not 0"));
|
|
} else {
|
|
struct sfxge_tx_mapping *stmp = &txq->stmp[id];
|
|
|
|
/* We cannot use bus_dmamem_alloc() as that may sleep */
|
|
header = malloc(tso->header_len, M_SFXGE, M_NOWAIT);
|
|
if (__predict_false(!header))
|
|
return (ENOMEM);
|
|
rc = bus_dmamap_load(txq->packet_dma_tag, stmp->map,
|
|
header, tso->header_len,
|
|
tso_map_long_header, &dma_addr,
|
|
BUS_DMA_NOWAIT);
|
|
if (__predict_false(dma_addr == 0)) {
|
|
if (rc == 0) {
|
|
/* Succeeded but got >1 segment */
|
|
bus_dmamap_unload(txq->packet_dma_tag,
|
|
stmp->map);
|
|
rc = EINVAL;
|
|
}
|
|
free(header, M_SFXGE);
|
|
return (rc);
|
|
}
|
|
map = stmp->map;
|
|
|
|
txq->tso_long_headers++;
|
|
stmp->u.heap_buf = header;
|
|
stmp->flags = TX_BUF_UNMAP;
|
|
}
|
|
|
|
tsoh_th = (struct tcphdr *)(header + tso->tcph_off);
|
|
|
|
/* Copy and update the headers. */
|
|
m_copydata(tso->mbuf, 0, tso->header_len, header);
|
|
|
|
tsoh_th->th_seq = htonl(tso->seqnum);
|
|
tso->seqnum += tso->seg_size;
|
|
if (tso->out_len > tso->seg_size) {
|
|
/* This packet will not finish the TSO burst. */
|
|
ip_length = tso->header_len - tso->nh_off + tso->seg_size;
|
|
tsoh_th->th_flags &= ~(TH_FIN | TH_PUSH);
|
|
} else {
|
|
/* This packet will be the last in the TSO burst. */
|
|
ip_length = tso->header_len - tso->nh_off + tso->out_len;
|
|
}
|
|
|
|
if (tso->protocol == htons(ETHERTYPE_IP)) {
|
|
struct ip *tsoh_iph = (struct ip *)(header + tso->nh_off);
|
|
tsoh_iph->ip_len = htons(ip_length);
|
|
/* XXX We should increment ip_id, but FreeBSD doesn't
|
|
* currently allocate extra IDs for multiple segments.
|
|
*/
|
|
} else {
|
|
struct ip6_hdr *tsoh_iph =
|
|
(struct ip6_hdr *)(header + tso->nh_off);
|
|
tsoh_iph->ip6_plen = htons(ip_length - sizeof(*tsoh_iph));
|
|
}
|
|
|
|
/* Make the header visible to the hardware. */
|
|
bus_dmamap_sync(txq->packet_dma_tag, map, BUS_DMASYNC_PREWRITE);
|
|
|
|
/* Form a descriptor for this header. */
|
|
desc = &txq->pend_desc[txq->n_pend_desc++];
|
|
efx_tx_qdesc_dma_create(txq->common,
|
|
dma_addr,
|
|
tso->header_len,
|
|
0,
|
|
desc);
|
|
id = (id + 1) & txq->ptr_mask;
|
|
|
|
tso->segs_space = UINT_MAX;
|
|
}
|
|
tso->packet_space = tso->seg_size;
|
|
txq->tso_packets++;
|
|
*idp = id;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sfxge_tx_queue_tso(struct sfxge_txq *txq, struct mbuf *mbuf,
|
|
const bus_dma_segment_t *dma_seg, int n_dma_seg,
|
|
int vlan_tagged)
|
|
{
|
|
struct sfxge_tso_state tso;
|
|
unsigned int id;
|
|
unsigned skipped = 0;
|
|
|
|
tso_start(txq, &tso, dma_seg, mbuf);
|
|
|
|
while (dma_seg->ds_len + skipped <= tso.header_len) {
|
|
skipped += dma_seg->ds_len;
|
|
--n_dma_seg;
|
|
KASSERT(n_dma_seg, ("no payload found in TSO packet"));
|
|
++dma_seg;
|
|
}
|
|
tso.in_len = dma_seg->ds_len - (tso.header_len - skipped);
|
|
tso.dma_addr = dma_seg->ds_addr + (tso.header_len - skipped);
|
|
|
|
id = (txq->added + vlan_tagged) & txq->ptr_mask;
|
|
if (__predict_false(tso_start_new_packet(txq, &tso, &id)))
|
|
return (-1);
|
|
|
|
while (1) {
|
|
tso_fill_packet_with_fragment(txq, &tso);
|
|
/* Exactly one DMA descriptor is added */
|
|
KASSERT(txq->stmp[id].flags == 0, ("stmp flags are not 0"));
|
|
id = (id + 1) & txq->ptr_mask;
|
|
|
|
/* Move onto the next fragment? */
|
|
if (tso.in_len == 0) {
|
|
--n_dma_seg;
|
|
if (n_dma_seg == 0)
|
|
break;
|
|
++dma_seg;
|
|
tso.in_len = dma_seg->ds_len;
|
|
tso.dma_addr = dma_seg->ds_addr;
|
|
}
|
|
|
|
/* End of packet? */
|
|
if ((tso.packet_space == 0) | (tso.segs_space == 0)) {
|
|
unsigned int n_fatso_opt_desc =
|
|
(tso.fw_assisted & SFXGE_FATSOV2) ?
|
|
EFX_TX_FATSOV2_OPT_NDESCS :
|
|
(tso.fw_assisted & SFXGE_FATSOV1) ? 1 : 0;
|
|
|
|
/* If the queue is now full due to tiny MSS,
|
|
* or we can't create another header, discard
|
|
* the remainder of the input mbuf but do not
|
|
* roll back the work we have done.
|
|
*/
|
|
if (txq->n_pend_desc + n_fatso_opt_desc +
|
|
1 /* header */ + n_dma_seg > txq->max_pkt_desc) {
|
|
txq->tso_pdrop_too_many++;
|
|
break;
|
|
}
|
|
if (__predict_false(tso_start_new_packet(txq, &tso,
|
|
&id))) {
|
|
txq->tso_pdrop_no_rsrc++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
txq->tso_bursts++;
|
|
return (id);
|
|
}
|
|
|
|
static void
|
|
sfxge_tx_qunblock(struct sfxge_txq *txq)
|
|
{
|
|
struct sfxge_softc *sc;
|
|
struct sfxge_evq *evq;
|
|
|
|
sc = txq->sc;
|
|
evq = sc->evq[txq->evq_index];
|
|
|
|
SFXGE_EVQ_LOCK_ASSERT_OWNED(evq);
|
|
|
|
if (__predict_false(txq->init_state != SFXGE_TXQ_STARTED))
|
|
return;
|
|
|
|
SFXGE_TXQ_LOCK(txq);
|
|
|
|
if (txq->blocked) {
|
|
unsigned int level;
|
|
|
|
level = txq->added - txq->completed;
|
|
if (level <= SFXGE_TXQ_UNBLOCK_LEVEL(txq->entries)) {
|
|
/* reaped must be in sync with blocked */
|
|
sfxge_tx_qreap(txq);
|
|
txq->blocked = 0;
|
|
}
|
|
}
|
|
|
|
sfxge_tx_qdpl_service(txq);
|
|
/* note: lock has been dropped */
|
|
}
|
|
|
|
void
|
|
sfxge_tx_qflush_done(struct sfxge_txq *txq)
|
|
{
|
|
|
|
txq->flush_state = SFXGE_FLUSH_DONE;
|
|
}
|
|
|
|
static void
|
|
sfxge_tx_qstop(struct sfxge_softc *sc, unsigned int index)
|
|
{
|
|
struct sfxge_txq *txq;
|
|
struct sfxge_evq *evq;
|
|
unsigned int count;
|
|
|
|
SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc);
|
|
|
|
txq = sc->txq[index];
|
|
evq = sc->evq[txq->evq_index];
|
|
|
|
SFXGE_EVQ_LOCK(evq);
|
|
SFXGE_TXQ_LOCK(txq);
|
|
|
|
KASSERT(txq->init_state == SFXGE_TXQ_STARTED,
|
|
("txq->init_state != SFXGE_TXQ_STARTED"));
|
|
|
|
txq->init_state = SFXGE_TXQ_INITIALIZED;
|
|
|
|
if (txq->flush_state != SFXGE_FLUSH_DONE) {
|
|
txq->flush_state = SFXGE_FLUSH_PENDING;
|
|
|
|
SFXGE_EVQ_UNLOCK(evq);
|
|
SFXGE_TXQ_UNLOCK(txq);
|
|
|
|
/* Flush the transmit queue. */
|
|
if (efx_tx_qflush(txq->common) != 0) {
|
|
log(LOG_ERR, "%s: Flushing Tx queue %u failed\n",
|
|
device_get_nameunit(sc->dev), index);
|
|
txq->flush_state = SFXGE_FLUSH_DONE;
|
|
} else {
|
|
count = 0;
|
|
do {
|
|
/* Spin for 100ms. */
|
|
DELAY(100000);
|
|
if (txq->flush_state != SFXGE_FLUSH_PENDING)
|
|
break;
|
|
} while (++count < 20);
|
|
}
|
|
SFXGE_EVQ_LOCK(evq);
|
|
SFXGE_TXQ_LOCK(txq);
|
|
|
|
KASSERT(txq->flush_state != SFXGE_FLUSH_FAILED,
|
|
("txq->flush_state == SFXGE_FLUSH_FAILED"));
|
|
|
|
if (txq->flush_state != SFXGE_FLUSH_DONE) {
|
|
/* Flush timeout */
|
|
log(LOG_ERR, "%s: Cannot flush Tx queue %u\n",
|
|
device_get_nameunit(sc->dev), index);
|
|
txq->flush_state = SFXGE_FLUSH_DONE;
|
|
}
|
|
}
|
|
|
|
txq->blocked = 0;
|
|
txq->pending = txq->added;
|
|
|
|
sfxge_tx_qcomplete(txq, evq);
|
|
KASSERT(txq->completed == txq->added,
|
|
("txq->completed != txq->added"));
|
|
|
|
sfxge_tx_qreap(txq);
|
|
KASSERT(txq->reaped == txq->completed,
|
|
("txq->reaped != txq->completed"));
|
|
|
|
txq->added = 0;
|
|
txq->pending = 0;
|
|
txq->completed = 0;
|
|
txq->reaped = 0;
|
|
|
|
/* Destroy the common code transmit queue. */
|
|
efx_tx_qdestroy(txq->common);
|
|
txq->common = NULL;
|
|
|
|
efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id,
|
|
EFX_TXQ_NBUFS(sc->txq_entries));
|
|
|
|
SFXGE_EVQ_UNLOCK(evq);
|
|
SFXGE_TXQ_UNLOCK(txq);
|
|
}
|
|
|
|
/*
|
|
* Estimate maximum number of Tx descriptors required for TSO packet.
|
|
* With minimum MSS and maximum mbuf length we might need more (even
|
|
* than a ring-ful of descriptors), but this should not happen in
|
|
* practice except due to deliberate attack. In that case we will
|
|
* truncate the output at a packet boundary.
|
|
*/
|
|
static unsigned int
|
|
sfxge_tx_max_pkt_desc(const struct sfxge_softc *sc, enum sfxge_txq_type type,
|
|
unsigned int tso_fw_assisted)
|
|
{
|
|
/* One descriptor for every input fragment */
|
|
unsigned int max_descs = SFXGE_TX_MAPPING_MAX_SEG;
|
|
unsigned int sw_tso_max_descs;
|
|
unsigned int fa_tso_v1_max_descs = 0;
|
|
unsigned int fa_tso_v2_max_descs = 0;
|
|
|
|
/* VLAN tagging Tx option descriptor may be required */
|
|
if (efx_nic_cfg_get(sc->enp)->enc_hw_tx_insert_vlan_enabled)
|
|
max_descs++;
|
|
|
|
if (type == SFXGE_TXQ_IP_TCP_UDP_CKSUM) {
|
|
/*
|
|
* Plus header and payload descriptor for each output segment.
|
|
* Minus one since header fragment is already counted.
|
|
* Even if FATSO is used, we should be ready to fallback
|
|
* to do it in the driver.
|
|
*/
|
|
sw_tso_max_descs = SFXGE_TSO_MAX_SEGS * 2 - 1;
|
|
|
|
/* FW assisted TSOv1 requires one more descriptor per segment
|
|
* in comparison to SW TSO */
|
|
if (tso_fw_assisted & SFXGE_FATSOV1)
|
|
fa_tso_v1_max_descs =
|
|
sw_tso_max_descs + SFXGE_TSO_MAX_SEGS;
|
|
|
|
/* FW assisted TSOv2 requires 3 (2 FATSO plus header) extra
|
|
* descriptors per superframe limited by number of DMA fetches
|
|
* per packet. The first packet header is already counted.
|
|
*/
|
|
if (tso_fw_assisted & SFXGE_FATSOV2) {
|
|
fa_tso_v2_max_descs =
|
|
howmany(SFXGE_TX_MAPPING_MAX_SEG,
|
|
EFX_TX_FATSOV2_DMA_SEGS_PER_PKT_MAX - 1) *
|
|
(EFX_TX_FATSOV2_OPT_NDESCS + 1) - 1;
|
|
}
|
|
|
|
max_descs += MAX(sw_tso_max_descs,
|
|
MAX(fa_tso_v1_max_descs, fa_tso_v2_max_descs));
|
|
}
|
|
|
|
return (max_descs);
|
|
}
|
|
|
|
static int
|
|
sfxge_tx_qstart(struct sfxge_softc *sc, unsigned int index)
|
|
{
|
|
struct sfxge_txq *txq;
|
|
efsys_mem_t *esmp;
|
|
uint16_t flags;
|
|
unsigned int tso_fw_assisted;
|
|
struct sfxge_evq *evq;
|
|
unsigned int desc_index;
|
|
int rc;
|
|
|
|
SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc);
|
|
|
|
txq = sc->txq[index];
|
|
esmp = &txq->mem;
|
|
evq = sc->evq[txq->evq_index];
|
|
|
|
KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED,
|
|
("txq->init_state != SFXGE_TXQ_INITIALIZED"));
|
|
KASSERT(evq->init_state == SFXGE_EVQ_STARTED,
|
|
("evq->init_state != SFXGE_EVQ_STARTED"));
|
|
|
|
/* Program the buffer table. */
|
|
if ((rc = efx_sram_buf_tbl_set(sc->enp, txq->buf_base_id, esmp,
|
|
EFX_TXQ_NBUFS(sc->txq_entries))) != 0)
|
|
return (rc);
|
|
|
|
/* Determine the kind of queue we are creating. */
|
|
tso_fw_assisted = 0;
|
|
switch (txq->type) {
|
|
case SFXGE_TXQ_NON_CKSUM:
|
|
flags = 0;
|
|
break;
|
|
case SFXGE_TXQ_IP_CKSUM:
|
|
flags = EFX_TXQ_CKSUM_IPV4;
|
|
break;
|
|
case SFXGE_TXQ_IP_TCP_UDP_CKSUM:
|
|
flags = EFX_TXQ_CKSUM_IPV4 | EFX_TXQ_CKSUM_TCPUDP;
|
|
tso_fw_assisted = sc->tso_fw_assisted;
|
|
if (tso_fw_assisted & SFXGE_FATSOV2)
|
|
flags |= EFX_TXQ_FATSOV2;
|
|
break;
|
|
default:
|
|
KASSERT(0, ("Impossible TX queue"));
|
|
flags = 0;
|
|
break;
|
|
}
|
|
|
|
/* Create the common code transmit queue. */
|
|
if ((rc = efx_tx_qcreate(sc->enp, index, txq->type, esmp,
|
|
sc->txq_entries, txq->buf_base_id, flags, evq->common,
|
|
&txq->common, &desc_index)) != 0) {
|
|
/* Retry if no FATSOv2 resources, otherwise fail */
|
|
if ((rc != ENOSPC) || (~flags & EFX_TXQ_FATSOV2))
|
|
goto fail;
|
|
|
|
/* Looks like all FATSOv2 contexts are used */
|
|
flags &= ~EFX_TXQ_FATSOV2;
|
|
tso_fw_assisted &= ~SFXGE_FATSOV2;
|
|
if ((rc = efx_tx_qcreate(sc->enp, index, txq->type, esmp,
|
|
sc->txq_entries, txq->buf_base_id, flags, evq->common,
|
|
&txq->common, &desc_index)) != 0)
|
|
goto fail;
|
|
}
|
|
|
|
/* Initialise queue descriptor indexes */
|
|
txq->added = txq->pending = txq->completed = txq->reaped = desc_index;
|
|
|
|
SFXGE_TXQ_LOCK(txq);
|
|
|
|
/* Enable the transmit queue. */
|
|
efx_tx_qenable(txq->common);
|
|
|
|
txq->init_state = SFXGE_TXQ_STARTED;
|
|
txq->flush_state = SFXGE_FLUSH_REQUIRED;
|
|
txq->tso_fw_assisted = tso_fw_assisted;
|
|
|
|
txq->max_pkt_desc = sfxge_tx_max_pkt_desc(sc, txq->type,
|
|
tso_fw_assisted);
|
|
|
|
SFXGE_TXQ_UNLOCK(txq);
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
efx_sram_buf_tbl_clear(sc->enp, txq->buf_base_id,
|
|
EFX_TXQ_NBUFS(sc->txq_entries));
|
|
return (rc);
|
|
}
|
|
|
|
void
|
|
sfxge_tx_stop(struct sfxge_softc *sc)
|
|
{
|
|
int index;
|
|
|
|
index = sc->txq_count;
|
|
while (--index >= 0)
|
|
sfxge_tx_qstop(sc, index);
|
|
|
|
/* Tear down the transmit module */
|
|
efx_tx_fini(sc->enp);
|
|
}
|
|
|
|
int
|
|
sfxge_tx_start(struct sfxge_softc *sc)
|
|
{
|
|
int index;
|
|
int rc;
|
|
|
|
/* Initialize the common code transmit module. */
|
|
if ((rc = efx_tx_init(sc->enp)) != 0)
|
|
return (rc);
|
|
|
|
for (index = 0; index < sc->txq_count; index++) {
|
|
if ((rc = sfxge_tx_qstart(sc, index)) != 0)
|
|
goto fail;
|
|
}
|
|
|
|
return (0);
|
|
|
|
fail:
|
|
while (--index >= 0)
|
|
sfxge_tx_qstop(sc, index);
|
|
|
|
efx_tx_fini(sc->enp);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static int
|
|
sfxge_txq_stat_init(struct sfxge_txq *txq, struct sysctl_oid *txq_node)
|
|
{
|
|
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(txq->sc->dev);
|
|
struct sysctl_oid *stat_node;
|
|
unsigned int id;
|
|
|
|
stat_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(txq_node), OID_AUTO,
|
|
"stats", CTLFLAG_RD, NULL,
|
|
"Tx queue statistics");
|
|
if (stat_node == NULL)
|
|
return (ENOMEM);
|
|
|
|
for (id = 0; id < nitems(sfxge_tx_stats); id++) {
|
|
SYSCTL_ADD_ULONG(
|
|
ctx, SYSCTL_CHILDREN(stat_node), OID_AUTO,
|
|
sfxge_tx_stats[id].name, CTLFLAG_RD | CTLFLAG_STATS,
|
|
(unsigned long *)((caddr_t)txq + sfxge_tx_stats[id].offset),
|
|
"");
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/**
|
|
* Destroy a transmit queue.
|
|
*/
|
|
static void
|
|
sfxge_tx_qfini(struct sfxge_softc *sc, unsigned int index)
|
|
{
|
|
struct sfxge_txq *txq;
|
|
unsigned int nmaps;
|
|
|
|
txq = sc->txq[index];
|
|
|
|
KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED,
|
|
("txq->init_state != SFXGE_TXQ_INITIALIZED"));
|
|
|
|
if (txq->type == SFXGE_TXQ_IP_TCP_UDP_CKSUM)
|
|
tso_fini(txq);
|
|
|
|
/* Free the context arrays. */
|
|
free(txq->pend_desc, M_SFXGE);
|
|
nmaps = sc->txq_entries;
|
|
while (nmaps-- != 0)
|
|
bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map);
|
|
free(txq->stmp, M_SFXGE);
|
|
|
|
/* Release DMA memory mapping. */
|
|
sfxge_dma_free(&txq->mem);
|
|
|
|
sc->txq[index] = NULL;
|
|
|
|
SFXGE_TXQ_LOCK_DESTROY(txq);
|
|
|
|
free(txq, M_SFXGE);
|
|
}
|
|
|
|
static int
|
|
sfxge_tx_qinit(struct sfxge_softc *sc, unsigned int txq_index,
|
|
enum sfxge_txq_type type, unsigned int evq_index)
|
|
{
|
|
char name[16];
|
|
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
|
|
struct sysctl_oid *txq_node;
|
|
struct sfxge_txq *txq;
|
|
struct sfxge_evq *evq;
|
|
struct sfxge_tx_dpl *stdp;
|
|
struct sysctl_oid *dpl_node;
|
|
efsys_mem_t *esmp;
|
|
unsigned int nmaps;
|
|
int rc;
|
|
|
|
txq = malloc(sizeof(struct sfxge_txq), M_SFXGE, M_ZERO | M_WAITOK);
|
|
txq->sc = sc;
|
|
txq->entries = sc->txq_entries;
|
|
txq->ptr_mask = txq->entries - 1;
|
|
|
|
sc->txq[txq_index] = txq;
|
|
esmp = &txq->mem;
|
|
|
|
evq = sc->evq[evq_index];
|
|
|
|
/* Allocate and zero DMA space for the descriptor ring. */
|
|
if ((rc = sfxge_dma_alloc(sc, EFX_TXQ_SIZE(sc->txq_entries), esmp)) != 0)
|
|
return (rc);
|
|
|
|
/* Allocate buffer table entries. */
|
|
sfxge_sram_buf_tbl_alloc(sc, EFX_TXQ_NBUFS(sc->txq_entries),
|
|
&txq->buf_base_id);
|
|
|
|
/* Create a DMA tag for packet mappings. */
|
|
if (bus_dma_tag_create(sc->parent_dma_tag, 1, 0x1000,
|
|
MIN(0x3FFFFFFFFFFFUL, BUS_SPACE_MAXADDR), BUS_SPACE_MAXADDR, NULL,
|
|
NULL, 0x11000, SFXGE_TX_MAPPING_MAX_SEG, 0x1000, 0, NULL, NULL,
|
|
&txq->packet_dma_tag) != 0) {
|
|
device_printf(sc->dev, "Couldn't allocate txq DMA tag\n");
|
|
rc = ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
/* Allocate pending descriptor array for batching writes. */
|
|
txq->pend_desc = malloc(sizeof(efx_desc_t) * sc->txq_entries,
|
|
M_SFXGE, M_ZERO | M_WAITOK);
|
|
|
|
/* Allocate and initialise mbuf DMA mapping array. */
|
|
txq->stmp = malloc(sizeof(struct sfxge_tx_mapping) * sc->txq_entries,
|
|
M_SFXGE, M_ZERO | M_WAITOK);
|
|
for (nmaps = 0; nmaps < sc->txq_entries; nmaps++) {
|
|
rc = bus_dmamap_create(txq->packet_dma_tag, 0,
|
|
&txq->stmp[nmaps].map);
|
|
if (rc != 0)
|
|
goto fail2;
|
|
}
|
|
|
|
snprintf(name, sizeof(name), "%u", txq_index);
|
|
txq_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sc->txqs_node),
|
|
OID_AUTO, name, CTLFLAG_RD, NULL, "");
|
|
if (txq_node == NULL) {
|
|
rc = ENOMEM;
|
|
goto fail_txq_node;
|
|
}
|
|
|
|
if (type == SFXGE_TXQ_IP_TCP_UDP_CKSUM &&
|
|
(rc = tso_init(txq)) != 0)
|
|
goto fail3;
|
|
|
|
if (sfxge_tx_dpl_get_max <= 0) {
|
|
log(LOG_ERR, "%s=%d must be greater than 0",
|
|
SFXGE_PARAM_TX_DPL_GET_MAX, sfxge_tx_dpl_get_max);
|
|
rc = EINVAL;
|
|
goto fail_tx_dpl_get_max;
|
|
}
|
|
if (sfxge_tx_dpl_get_non_tcp_max <= 0) {
|
|
log(LOG_ERR, "%s=%d must be greater than 0",
|
|
SFXGE_PARAM_TX_DPL_GET_NON_TCP_MAX,
|
|
sfxge_tx_dpl_get_non_tcp_max);
|
|
rc = EINVAL;
|
|
goto fail_tx_dpl_get_max;
|
|
}
|
|
if (sfxge_tx_dpl_put_max < 0) {
|
|
log(LOG_ERR, "%s=%d must be greater or equal to 0",
|
|
SFXGE_PARAM_TX_DPL_PUT_MAX, sfxge_tx_dpl_put_max);
|
|
rc = EINVAL;
|
|
goto fail_tx_dpl_put_max;
|
|
}
|
|
|
|
/* Initialize the deferred packet list. */
|
|
stdp = &txq->dpl;
|
|
stdp->std_put_max = sfxge_tx_dpl_put_max;
|
|
stdp->std_get_max = sfxge_tx_dpl_get_max;
|
|
stdp->std_get_non_tcp_max = sfxge_tx_dpl_get_non_tcp_max;
|
|
stdp->std_getp = &stdp->std_get;
|
|
|
|
SFXGE_TXQ_LOCK_INIT(txq, device_get_nameunit(sc->dev), txq_index);
|
|
|
|
dpl_node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(txq_node), OID_AUTO,
|
|
"dpl", CTLFLAG_RD, NULL,
|
|
"Deferred packet list statistics");
|
|
if (dpl_node == NULL) {
|
|
rc = ENOMEM;
|
|
goto fail_dpl_node;
|
|
}
|
|
|
|
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO,
|
|
"get_count", CTLFLAG_RD | CTLFLAG_STATS,
|
|
&stdp->std_get_count, 0, "");
|
|
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO,
|
|
"get_non_tcp_count", CTLFLAG_RD | CTLFLAG_STATS,
|
|
&stdp->std_get_non_tcp_count, 0, "");
|
|
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO,
|
|
"get_hiwat", CTLFLAG_RD | CTLFLAG_STATS,
|
|
&stdp->std_get_hiwat, 0, "");
|
|
SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(dpl_node), OID_AUTO,
|
|
"put_hiwat", CTLFLAG_RD | CTLFLAG_STATS,
|
|
&stdp->std_put_hiwat, 0, "");
|
|
|
|
rc = sfxge_txq_stat_init(txq, txq_node);
|
|
if (rc != 0)
|
|
goto fail_txq_stat_init;
|
|
|
|
txq->type = type;
|
|
txq->evq_index = evq_index;
|
|
txq->txq_index = txq_index;
|
|
txq->init_state = SFXGE_TXQ_INITIALIZED;
|
|
txq->hw_vlan_tci = 0;
|
|
|
|
return (0);
|
|
|
|
fail_txq_stat_init:
|
|
fail_dpl_node:
|
|
fail_tx_dpl_put_max:
|
|
fail_tx_dpl_get_max:
|
|
fail3:
|
|
fail_txq_node:
|
|
free(txq->pend_desc, M_SFXGE);
|
|
fail2:
|
|
while (nmaps-- != 0)
|
|
bus_dmamap_destroy(txq->packet_dma_tag, txq->stmp[nmaps].map);
|
|
free(txq->stmp, M_SFXGE);
|
|
bus_dma_tag_destroy(txq->packet_dma_tag);
|
|
|
|
fail:
|
|
sfxge_dma_free(esmp);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
static int
|
|
sfxge_tx_stat_handler(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct sfxge_softc *sc = arg1;
|
|
unsigned int id = arg2;
|
|
unsigned long sum;
|
|
unsigned int index;
|
|
|
|
/* Sum across all TX queues */
|
|
sum = 0;
|
|
for (index = 0; index < sc->txq_count; index++)
|
|
sum += *(unsigned long *)((caddr_t)sc->txq[index] +
|
|
sfxge_tx_stats[id].offset);
|
|
|
|
return (SYSCTL_OUT(req, &sum, sizeof(sum)));
|
|
}
|
|
|
|
static void
|
|
sfxge_tx_stat_init(struct sfxge_softc *sc)
|
|
{
|
|
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
|
|
struct sysctl_oid_list *stat_list;
|
|
unsigned int id;
|
|
|
|
stat_list = SYSCTL_CHILDREN(sc->stats_node);
|
|
|
|
for (id = 0; id < nitems(sfxge_tx_stats); id++) {
|
|
SYSCTL_ADD_PROC(
|
|
ctx, stat_list,
|
|
OID_AUTO, sfxge_tx_stats[id].name,
|
|
CTLTYPE_ULONG|CTLFLAG_RD,
|
|
sc, id, sfxge_tx_stat_handler, "LU",
|
|
"");
|
|
}
|
|
}
|
|
|
|
uint64_t
|
|
sfxge_tx_get_drops(struct sfxge_softc *sc)
|
|
{
|
|
unsigned int index;
|
|
uint64_t drops = 0;
|
|
struct sfxge_txq *txq;
|
|
|
|
/* Sum across all TX queues */
|
|
for (index = 0; index < sc->txq_count; index++) {
|
|
txq = sc->txq[index];
|
|
/*
|
|
* In theory, txq->put_overflow and txq->netdown_drops
|
|
* should use atomic operation and other should be
|
|
* obtained under txq lock, but it is just statistics.
|
|
*/
|
|
drops += txq->drops + txq->get_overflow +
|
|
txq->get_non_tcp_overflow +
|
|
txq->put_overflow + txq->netdown_drops +
|
|
txq->tso_pdrop_too_many + txq->tso_pdrop_no_rsrc;
|
|
}
|
|
return (drops);
|
|
}
|
|
|
|
void
|
|
sfxge_tx_fini(struct sfxge_softc *sc)
|
|
{
|
|
int index;
|
|
|
|
index = sc->txq_count;
|
|
while (--index >= 0)
|
|
sfxge_tx_qfini(sc, index);
|
|
|
|
sc->txq_count = 0;
|
|
}
|
|
|
|
|
|
int
|
|
sfxge_tx_init(struct sfxge_softc *sc)
|
|
{
|
|
const efx_nic_cfg_t *encp = efx_nic_cfg_get(sc->enp);
|
|
struct sfxge_intr *intr;
|
|
int index;
|
|
int rc;
|
|
|
|
intr = &sc->intr;
|
|
|
|
KASSERT(intr->state == SFXGE_INTR_INITIALIZED,
|
|
("intr->state != SFXGE_INTR_INITIALIZED"));
|
|
|
|
sc->txq_count = SFXGE_TXQ_NTYPES - 1 + sc->intr.n_alloc;
|
|
|
|
sc->tso_fw_assisted = sfxge_tso_fw_assisted;
|
|
if ((~encp->enc_features & EFX_FEATURE_FW_ASSISTED_TSO) ||
|
|
(!encp->enc_fw_assisted_tso_enabled))
|
|
sc->tso_fw_assisted &= ~SFXGE_FATSOV1;
|
|
if ((~encp->enc_features & EFX_FEATURE_FW_ASSISTED_TSO_V2) ||
|
|
(!encp->enc_fw_assisted_tso_v2_enabled))
|
|
sc->tso_fw_assisted &= ~SFXGE_FATSOV2;
|
|
|
|
sc->txqs_node = SYSCTL_ADD_NODE(
|
|
device_get_sysctl_ctx(sc->dev),
|
|
SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)),
|
|
OID_AUTO, "txq", CTLFLAG_RD, NULL, "Tx queues");
|
|
if (sc->txqs_node == NULL) {
|
|
rc = ENOMEM;
|
|
goto fail_txq_node;
|
|
}
|
|
|
|
/* Initialize the transmit queues */
|
|
if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NON_CKSUM,
|
|
SFXGE_TXQ_NON_CKSUM, 0)) != 0)
|
|
goto fail;
|
|
|
|
if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_IP_CKSUM,
|
|
SFXGE_TXQ_IP_CKSUM, 0)) != 0)
|
|
goto fail2;
|
|
|
|
for (index = 0;
|
|
index < sc->txq_count - SFXGE_TXQ_NTYPES + 1;
|
|
index++) {
|
|
if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NTYPES - 1 + index,
|
|
SFXGE_TXQ_IP_TCP_UDP_CKSUM, index)) != 0)
|
|
goto fail3;
|
|
}
|
|
|
|
sfxge_tx_stat_init(sc);
|
|
|
|
return (0);
|
|
|
|
fail3:
|
|
while (--index >= 0)
|
|
sfxge_tx_qfini(sc, SFXGE_TXQ_IP_TCP_UDP_CKSUM + index);
|
|
|
|
sfxge_tx_qfini(sc, SFXGE_TXQ_IP_CKSUM);
|
|
|
|
fail2:
|
|
sfxge_tx_qfini(sc, SFXGE_TXQ_NON_CKSUM);
|
|
|
|
fail:
|
|
fail_txq_node:
|
|
sc->txq_count = 0;
|
|
return (rc);
|
|
}
|