Differential D7802 Diff 20115 stable/10/sys/dev/ixl/ixl_txrx.c

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stable/10/sys/dev/ixl/ixl_txrx.c

Show First 20 Lines • Show All 240 Lines • ▼ Show 20 Lines	ixl_xmit(struct ixl_queue que, struct mbuf *m_headp)
int i, j, error, nsegs, maxsegs;		int i, j, error, nsegs, maxsegs;
int first, last = 0;		int first, last = 0;
u16 vtag = 0;		u16 vtag = 0;
u32 cmd, off;		u32 cmd, off;
bus_dmamap_t map;		bus_dmamap_t map;
bus_dma_tag_t tag;		bus_dma_tag_t tag;
bus_dma_segment_t segs[IXL_MAX_TSO_SEGS];		bus_dma_segment_t segs[IXL_MAX_TSO_SEGS];


cmd = off = 0;		cmd = off = 0;
m_head = *m_headp;		m_head = *m_headp;

/*		/*
* Important to capture the first descriptor		* Important to capture the first descriptor
* used because it will contain the index of		* used because it will contain the index of
* the one we tell the hardware to report back		* the one we tell the hardware to report back
*/		*/
Show All 22 Lines	ixl_xmit(struct ixl_queue que, struct mbuf *m_headp)
* Map the packet for DMA.		* Map the packet for DMA.
*/		*/
error = bus_dmamap_load_mbuf_sg(tag, map,		error = bus_dmamap_load_mbuf_sg(tag, map,
*m_headp, segs, &nsegs, BUS_DMA_NOWAIT);		*m_headp, segs, &nsegs, BUS_DMA_NOWAIT);

if (error == EFBIG) {		if (error == EFBIG) {
struct mbuf *m;		struct mbuf *m;

m = m_collapse(*m_headp, M_NOWAIT, maxsegs);		m = m_defrag(*m_headp, M_NOWAIT);
if (m == NULL) {		if (m == NULL) {
que->mbuf_defrag_failed++;		que->mbuf_defrag_failed++;
m_freem(*m_headp);		m_freem(*m_headp);
*m_headp = NULL;		*m_headp = NULL;
return (ENOBUFS);		return (ENOBUFS);
}		}
*m_headp = m;		*m_headp = m;

▲ Show 20 Lines • Show All 87 Lines • ▼ Show 20 Lines	buf->eop_index = last;
BUS_DMASYNC_PREREAD \| BUS_DMASYNC_PREWRITE);		BUS_DMASYNC_PREREAD \| BUS_DMASYNC_PREWRITE);
/*		/*
* Advance the Transmit Descriptor Tail (Tdt), this tells the		* Advance the Transmit Descriptor Tail (Tdt), this tells the
* hardware that this frame is available to transmit.		* hardware that this frame is available to transmit.
*/		*/
++txr->total_packets;		++txr->total_packets;
wr32(hw, txr->tail, i);		wr32(hw, txr->tail, i);

ixl_flush(hw);
/* Mark outstanding work */		/* Mark outstanding work */
if (que->busy == 0)		if (que->busy == 0)
que->busy = 1;		que->busy = 1;
return (0);		return (0);

xmit_fail:		xmit_fail:
bus_dmamap_unload(tag, buf->map);		bus_dmamap_unload(tag, buf->map);
return (error);		return (error);
▲ Show 20 Lines • Show All 224 Lines • ▼ Show 20 Lines
#ifdef INET6		#ifdef INET6
struct ip6_hdr *ip6;		struct ip6_hdr *ip6;
#endif		#endif
int elen, ip_hlen = 0, tcp_hlen;		int elen, ip_hlen = 0, tcp_hlen;
u16 etype;		u16 etype;
u8 ipproto = 0;		u8 ipproto = 0;
bool tso = FALSE;		bool tso = FALSE;


/* Set up the TSO context descriptor if required */		/* Set up the TSO context descriptor if required */
if (mp->m_pkthdr.csum_flags & CSUM_TSO) {		if (mp->m_pkthdr.csum_flags & CSUM_TSO) {
tso = ixl_tso_setup(que, mp);		tso = ixl_tso_setup(que, mp);
if (tso)		if (tso)
++que->tso;		++que->tso;
else		else
return (ENXIO);		return (ENXIO);
}		}
▲ Show 20 Lines • Show All 121 Lines • ▼ Show 20 Lines	#ifdef INET6
case ETHERTYPE_IPV6:		case ETHERTYPE_IPV6:
ip6 = (struct ip6_hdr *)(mp->m_data + elen);		ip6 = (struct ip6_hdr *)(mp->m_data + elen);
if (ip6->ip6_nxt != IPPROTO_TCP)		if (ip6->ip6_nxt != IPPROTO_TCP)
return (ENXIO);		return (ENXIO);
ip_hlen = sizeof(struct ip6_hdr);		ip_hlen = sizeof(struct ip6_hdr);
th = (struct tcphdr *)((caddr_t)ip6 + ip_hlen);		th = (struct tcphdr *)((caddr_t)ip6 + ip_hlen);
th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0);		th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0);
tcp_hlen = th->th_off << 2;		tcp_hlen = th->th_off << 2;
		/*
		* The corresponding flag is set by the stack in the IPv4
		* TSO case, but not in IPv6 (at least in FreeBSD 10.2).
		* So, set it here because the rest of the flow requires it.
		*/
		mp->m_pkthdr.csum_flags \|= CSUM_TCP_IPV6;
break;		break;
#endif		#endif
#ifdef INET		#ifdef INET
case ETHERTYPE_IP:		case ETHERTYPE_IP:
ip = (struct ip *)(mp->m_data + elen);		ip = (struct ip *)(mp->m_data + elen);
if (ip->ip_p != IPPROTO_TCP)		if (ip->ip_p != IPPROTO_TCP)
return (ENXIO);		return (ENXIO);
ip->ip_sum = 0;		ip->ip_sum = 0;
▲ Show 20 Lines • Show All 795 Lines • ▼ Show 20 Lines	else
vtag = 0;		vtag = 0;

/*		/*
** Make sure bad packets are discarded,		** Make sure bad packets are discarded,
** note that only EOP descriptor has valid		** note that only EOP descriptor has valid
** error results.		** error results.
*/		*/
if (eop && (error & (1 << I40E_RX_DESC_ERROR_RXE_SHIFT))) {		if (eop && (error & (1 << I40E_RX_DESC_ERROR_RXE_SHIFT))) {
rxr->discarded++;		rxr->desc_errs++;
ixl_rx_discard(rxr, i);		ixl_rx_discard(rxr, i);
goto next_desc;		goto next_desc;
}		}

/* Prefetch the next buffer */		/* Prefetch the next buffer */
if (!eop) {		if (!eop) {
nextp = i + 1;		nextp = i + 1;
if (nextp == que->num_desc)		if (nextp == que->num_desc)
▲ Show 20 Lines • Show All 241 Lines • Show Last 20 Lines