--- /dev/null	Tue May  3 20:52:15 2016
+++ new/usr/src/uts/common/io/sfxge/common/siena_mac.c	Tue May  3 20:52:15 2016
@@ -0,0 +1,441 @@
+/*
+ * Copyright (c) 2009-2015 Solarflare Communications Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are
+ * those of the authors and should not be interpreted as representing official
+ * policies, either expressed or implied, of the FreeBSD Project.
+ */
+
+#include "efx.h"
+#include "efx_impl.h"
+
+#if EFSYS_OPT_SIENA
+
+	__checkReturn	efx_rc_t
+siena_mac_poll(
+	__in		efx_nic_t *enp,
+	__out		efx_link_mode_t *link_modep)
+{
+	efx_port_t *epp = &(enp->en_port);
+	siena_link_state_t sls;
+	efx_rc_t rc;
+
+	if ((rc = siena_phy_get_link(enp, &sls)) != 0)
+		goto fail1;
+
+	epp->ep_adv_cap_mask = sls.sls_adv_cap_mask;
+	epp->ep_fcntl = sls.sls_fcntl;
+
+	*link_modep = sls.sls_link_mode;
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	*link_modep = EFX_LINK_UNKNOWN;
+
+	return (rc);
+}
+
+	__checkReturn	efx_rc_t
+siena_mac_up(
+	__in		efx_nic_t *enp,
+	__out		boolean_t *mac_upp)
+{
+	siena_link_state_t sls;
+	efx_rc_t rc;
+
+	/*
+	 * Because Siena doesn't *require* polling, we can't rely on
+	 * siena_mac_poll() being executed to populate epp->ep_mac_up.
+	 */
+	if ((rc = siena_phy_get_link(enp, &sls)) != 0)
+		goto fail1;
+
+	*mac_upp = sls.sls_mac_up;
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+	__checkReturn	efx_rc_t
+siena_mac_reconfigure(
+	__in		efx_nic_t *enp)
+{
+	efx_port_t *epp = &(enp->en_port);
+	efx_oword_t multicast_hash[2];
+	efx_mcdi_req_t req;
+	uint8_t payload[MAX(MAX(MC_CMD_SET_MAC_IN_LEN,
+				MC_CMD_SET_MAC_OUT_LEN),
+			    MAX(MC_CMD_SET_MCAST_HASH_IN_LEN,
+				MC_CMD_SET_MCAST_HASH_OUT_LEN))];
+	unsigned int fcntl;
+	efx_rc_t rc;
+
+	(void) memset(payload, 0, sizeof (payload));
+	req.emr_cmd = MC_CMD_SET_MAC;
+	req.emr_in_buf = payload;
+	req.emr_in_length = MC_CMD_SET_MAC_IN_LEN;
+	req.emr_out_buf = payload;
+	req.emr_out_length = MC_CMD_SET_MAC_OUT_LEN;
+
+	MCDI_IN_SET_DWORD(req, SET_MAC_IN_MTU, epp->ep_mac_pdu);
+	MCDI_IN_SET_DWORD(req, SET_MAC_IN_DRAIN, epp->ep_mac_drain ? 1 : 0);
+	EFX_MAC_ADDR_COPY(MCDI_IN2(req, uint8_t, SET_MAC_IN_ADDR),
+			    epp->ep_mac_addr);
+	MCDI_IN_POPULATE_DWORD_2(req, SET_MAC_IN_REJECT,
+			    SET_MAC_IN_REJECT_UNCST, !epp->ep_all_unicst,
+			    SET_MAC_IN_REJECT_BRDCST, !epp->ep_brdcst);
+
+	if (epp->ep_fcntl_autoneg)
+		/* efx_fcntl_set() has already set the phy capabilities */
+		fcntl = MC_CMD_FCNTL_AUTO;
+	else if (epp->ep_fcntl & EFX_FCNTL_RESPOND)
+		fcntl = (epp->ep_fcntl & EFX_FCNTL_GENERATE)
+			? MC_CMD_FCNTL_BIDIR
+			: MC_CMD_FCNTL_RESPOND;
+	else
+		fcntl = MC_CMD_FCNTL_OFF;
+
+	MCDI_IN_SET_DWORD(req, SET_MAC_IN_FCNTL, fcntl);
+
+	efx_mcdi_execute(enp, &req);
+
+	if (req.emr_rc != 0) {
+		rc = req.emr_rc;
+		goto fail1;
+	}
+
+	/* Push multicast hash */
+
+	if (epp->ep_all_mulcst) {
+		/* A hash matching all multicast is all 1s */
+		EFX_SET_OWORD(multicast_hash[0]);
+		EFX_SET_OWORD(multicast_hash[1]);
+	} else if (epp->ep_mulcst) {
+		/* Use the hash set by the multicast list */
+		multicast_hash[0] = epp->ep_multicst_hash[0];
+		multicast_hash[1] = epp->ep_multicst_hash[1];
+	} else {
+		/* A hash matching no traffic is simply 0 */
+		EFX_ZERO_OWORD(multicast_hash[0]);
+		EFX_ZERO_OWORD(multicast_hash[1]);
+	}
+
+	/*
+	 * Broadcast packets go through the multicast hash filter.
+	 * The IEEE 802.3 CRC32 of the broadcast address is 0xbe2612ff
+	 * so we always add bit 0xff to the mask (bit 0x7f in the
+	 * second octword).
+	 */
+	if (epp->ep_brdcst) {
+		/*
+		 * NB: due to constant folding, some of this evaluates
+		 * to null expressions, giving E_EXPR_NULL_EFFECT during
+		 * lint.  No good way to fix this without explicit coding
+		 * the individual word/bit setting. So just suppress lint
+		 * for this one line.
+		 */
+		/* LINTED */
+		EFX_SET_OWORD_BIT(multicast_hash[1], 0x7f);
+	}
+
+	(void) memset(payload, 0, sizeof (payload));
+	req.emr_cmd = MC_CMD_SET_MCAST_HASH;
+	req.emr_in_buf = payload;
+	req.emr_in_length = MC_CMD_SET_MCAST_HASH_IN_LEN;
+	req.emr_out_buf = payload;
+	req.emr_out_length = MC_CMD_SET_MCAST_HASH_OUT_LEN;
+
+	(void) memcpy(MCDI_IN2(req, uint8_t, SET_MCAST_HASH_IN_HASH0),
+	    multicast_hash, sizeof (multicast_hash));
+
+	efx_mcdi_execute(enp, &req);
+
+	if (req.emr_rc != 0) {
+		rc = req.emr_rc;
+		goto fail2;
+	}
+
+	return (0);
+
+fail2:
+	EFSYS_PROBE(fail2);
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+#if EFSYS_OPT_LOOPBACK
+
+	__checkReturn	efx_rc_t
+siena_mac_loopback_set(
+	__in		efx_nic_t *enp,
+	__in		efx_link_mode_t link_mode,
+	__in		efx_loopback_type_t loopback_type)
+{
+	efx_port_t *epp = &(enp->en_port);
+	const efx_phy_ops_t *epop = epp->ep_epop;
+	efx_loopback_type_t old_loopback_type;
+	efx_link_mode_t old_loopback_link_mode;
+	efx_rc_t rc;
+
+	/* The PHY object handles this on Siena */
+	old_loopback_type = epp->ep_loopback_type;
+	old_loopback_link_mode = epp->ep_loopback_link_mode;
+	epp->ep_loopback_type = loopback_type;
+	epp->ep_loopback_link_mode = link_mode;
+
+	if ((rc = epop->epo_reconfigure(enp)) != 0)
+		goto fail1;
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE(fail2);
+
+	epp->ep_loopback_type = old_loopback_type;
+	epp->ep_loopback_link_mode = old_loopback_link_mode;
+
+	return (rc);
+}
+
+#endif	/* EFSYS_OPT_LOOPBACK */
+
+#if EFSYS_OPT_MAC_STATS
+
+#define	SIENA_MAC_STAT_READ(_esmp, _field, _eqp)			\
+	EFSYS_MEM_READQ((_esmp), (_field) * sizeof (efx_qword_t), _eqp)
+
+	__checkReturn			efx_rc_t
+siena_mac_stats_update(
+	__in				efx_nic_t *enp,
+	__in				efsys_mem_t *esmp,
+	__inout_ecount(EFX_MAC_NSTATS)	efsys_stat_t *stat,
+	__inout_opt			uint32_t *generationp)
+{
+	efx_qword_t value;
+	efx_qword_t generation_start;
+	efx_qword_t generation_end;
+
+	_NOTE(ARGUNUSED(enp))
+
+	/* Read END first so we don't race with the MC */
+	EFSYS_DMA_SYNC_FOR_KERNEL(esmp, 0, EFX_MAC_STATS_SIZE);
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_GENERATION_END,
+			    &generation_end);
+	EFSYS_MEM_READ_BARRIER();
+
+	/* TX */
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_PKTS]), &value);
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_CONTROL_PKTS, &value);
+	EFSYS_STAT_SUBR_QWORD(&(stat[EFX_MAC_TX_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_PAUSE_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_PAUSE_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_UNICAST_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_UNICST_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_MULTICAST_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_MULTICST_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_BROADCAST_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_BRDCST_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_BYTES, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_OCTETS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_LT64_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_LE_64_PKTS]), &value);
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_64_PKTS, &value);
+	EFSYS_STAT_INCR_QWORD(&(stat[EFX_MAC_TX_LE_64_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_65_TO_127_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_65_TO_127_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_128_TO_255_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_128_TO_255_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_256_TO_511_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_256_TO_511_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_512_TO_1023_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_512_TO_1023_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_1024_TO_15XX_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_1024_TO_15XX_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_15XX_TO_JUMBO_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_GE_15XX_PKTS]), &value);
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_GTJUMBO_PKTS, &value);
+	EFSYS_STAT_INCR_QWORD(&(stat[EFX_MAC_TX_GE_15XX_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_BAD_FCS_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_ERRORS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_SINGLE_COLLISION_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_SGL_COL_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_MULTIPLE_COLLISION_PKTS,
+			    &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_MULT_COL_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_EXCESSIVE_COLLISION_PKTS,
+			    &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_EX_COL_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_LATE_COLLISION_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_LATE_COL_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_DEFERRED_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_DEF_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_TX_EXCESSIVE_DEFERRED_PKTS,
+	    &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_TX_EX_DEF_PKTS]), &value);
+
+	/* RX */
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_BYTES, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_OCTETS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_UNICAST_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_UNICST_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_MULTICAST_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_MULTICST_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_BROADCAST_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_BRDCST_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_PAUSE_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_PAUSE_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_UNDERSIZE_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_LE_64_PKTS]), &value);
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_64_PKTS, &value);
+	EFSYS_STAT_INCR_QWORD(&(stat[EFX_MAC_RX_LE_64_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_65_TO_127_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_65_TO_127_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_128_TO_255_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_128_TO_255_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_256_TO_511_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_256_TO_511_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_512_TO_1023_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_512_TO_1023_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_1024_TO_15XX_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_1024_TO_15XX_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_15XX_TO_JUMBO_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_GE_15XX_PKTS]), &value);
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_GTJUMBO_PKTS, &value);
+	EFSYS_STAT_INCR_QWORD(&(stat[EFX_MAC_RX_GE_15XX_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_BAD_FCS_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_FCS_ERRORS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_OVERFLOW_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_DROP_EVENTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_FALSE_CARRIER_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_FALSE_CARRIER_ERRORS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_SYMBOL_ERROR_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_SYMBOL_ERRORS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_ALIGN_ERROR_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_ALIGN_ERRORS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_INTERNAL_ERROR_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_INTERNAL_ERRORS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_JABBER_PKTS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_JABBER_PKTS]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_LANES01_CHAR_ERR, &value);
+	EFSYS_STAT_SET_DWORD(&(stat[EFX_MAC_RX_LANE0_CHAR_ERR]),
+			    &(value.eq_dword[0]));
+	EFSYS_STAT_SET_DWORD(&(stat[EFX_MAC_RX_LANE1_CHAR_ERR]),
+			    &(value.eq_dword[1]));
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_LANES23_CHAR_ERR, &value);
+	EFSYS_STAT_SET_DWORD(&(stat[EFX_MAC_RX_LANE2_CHAR_ERR]),
+			    &(value.eq_dword[0]));
+	EFSYS_STAT_SET_DWORD(&(stat[EFX_MAC_RX_LANE3_CHAR_ERR]),
+			    &(value.eq_dword[1]));
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_LANES01_DISP_ERR, &value);
+	EFSYS_STAT_SET_DWORD(&(stat[EFX_MAC_RX_LANE0_DISP_ERR]),
+			    &(value.eq_dword[0]));
+	EFSYS_STAT_SET_DWORD(&(stat[EFX_MAC_RX_LANE1_DISP_ERR]),
+			    &(value.eq_dword[1]));
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_LANES23_DISP_ERR, &value);
+	EFSYS_STAT_SET_DWORD(&(stat[EFX_MAC_RX_LANE2_DISP_ERR]),
+			    &(value.eq_dword[0]));
+	EFSYS_STAT_SET_DWORD(&(stat[EFX_MAC_RX_LANE3_DISP_ERR]),
+			    &(value.eq_dword[1]));
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_MATCH_FAULT, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_MATCH_FAULT]), &value);
+
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_RX_NODESC_DROPS, &value);
+	EFSYS_STAT_SET_QWORD(&(stat[EFX_MAC_RX_NODESC_DROP_CNT]), &value);
+
+	EFSYS_DMA_SYNC_FOR_KERNEL(esmp, 0, EFX_MAC_STATS_SIZE);
+	EFSYS_MEM_READ_BARRIER();
+	SIENA_MAC_STAT_READ(esmp, MC_CMD_MAC_GENERATION_START,
+			    &generation_start);
+
+	/* Check that we didn't read the stats in the middle of a DMA */
+	/* Not a good enough check ? */
+	if (memcmp(&generation_start, &generation_end,
+	    sizeof (generation_start)))
+		return (EAGAIN);
+
+	if (generationp)
+		*generationp = EFX_QWORD_FIELD(generation_start, EFX_DWORD_0);
+
+	return (0);
+}
+
+#endif	/* EFSYS_OPT_MAC_STATS */
+
+#endif	/* EFSYS_OPT_SIENA */
