path: root/drivers/net/sfc/base/ef10_rx.c

/* SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2012-2018 Solarflare Communications Inc.
 * All rights reserved.
 */

#include "efx.h"
#include "efx_impl.h"


#if EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD || EFSYS_OPT_MEDFORD2


static	__checkReturn	efx_rc_t
efx_mcdi_init_rxq(
	__in		efx_nic_t *enp,
	__in		uint32_t ndescs,
	__in		uint32_t target_evq,
	__in		uint32_t label,
	__in		uint32_t instance,
	__in		efsys_mem_t *esmp,
	__in		boolean_t disable_scatter,
	__in		boolean_t want_inner_classes,
	__in		uint32_t ps_bufsize,
	__in		uint32_t es_bufs_per_desc,
	__in		uint32_t es_max_dma_len,
	__in		uint32_t es_buf_stride,
	__in		uint32_t hol_block_timeout)
{
	efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
	efx_mcdi_req_t req;
	uint8_t payload[MAX(MC_CMD_INIT_RXQ_V3_IN_LEN,
			    MC_CMD_INIT_RXQ_V3_OUT_LEN)];
	int npages = EFX_RXQ_NBUFS(ndescs);
	int i;
	efx_qword_t *dma_addr;
	uint64_t addr;
	efx_rc_t rc;
	uint32_t dma_mode;
	boolean_t want_outer_classes;

	EFSYS_ASSERT3U(ndescs, <=, EFX_RXQ_MAXNDESCS);

	if ((esmp == NULL) || (EFSYS_MEM_SIZE(esmp) < EFX_RXQ_SIZE(ndescs))) {
		rc = EINVAL;
		goto fail1;
	}

	if (ps_bufsize > 0)
		dma_mode = MC_CMD_INIT_RXQ_EXT_IN_PACKED_STREAM;
	else if (es_bufs_per_desc > 0)
		dma_mode = MC_CMD_INIT_RXQ_V3_IN_EQUAL_STRIDE_SUPER_BUFFER;
	else
		dma_mode = MC_CMD_INIT_RXQ_EXT_IN_SINGLE_PACKET;

	if (encp->enc_tunnel_encapsulations_supported != 0 &&
	    !want_inner_classes) {
		/*
		 * WANT_OUTER_CLASSES can only be specified on hardware which
		 * supports tunnel encapsulation offloads, even though it is
		 * effectively the behaviour the hardware gives.
		 *
		 * Also, on hardware which does support such offloads, older
		 * firmware rejects the flag if the offloads are not supported
		 * by the current firmware variant, which means this may fail if
		 * the capabilities are not updated when the firmware variant
		 * changes. This is not an issue on newer firmware, as it was
		 * changed in bug 69842 (v6.4.2.1007) to permit this flag to be
		 * specified on all firmware variants.
		 */
		want_outer_classes = B_TRUE;
	} else {
		want_outer_classes = B_FALSE;
	}

	(void) memset(payload, 0, sizeof (payload));
	req.emr_cmd = MC_CMD_INIT_RXQ;
	req.emr_in_buf = payload;
	req.emr_in_length = MC_CMD_INIT_RXQ_V3_IN_LEN;
	req.emr_out_buf = payload;
	req.emr_out_length = MC_CMD_INIT_RXQ_V3_OUT_LEN;

	MCDI_IN_SET_DWORD(req, INIT_RXQ_EXT_IN_SIZE, ndescs);
	MCDI_IN_SET_DWORD(req, INIT_RXQ_EXT_IN_TARGET_EVQ, target_evq);
	MCDI_IN_SET_DWORD(req, INIT_RXQ_EXT_IN_LABEL, label);
	MCDI_IN_SET_DWORD(req, INIT_RXQ_EXT_IN_INSTANCE, instance);
	MCDI_IN_POPULATE_DWORD_9(req, INIT_RXQ_EXT_IN_FLAGS,
	    INIT_RXQ_EXT_IN_FLAG_BUFF_MODE, 0,
	    INIT_RXQ_EXT_IN_FLAG_HDR_SPLIT, 0,
	    INIT_RXQ_EXT_IN_FLAG_TIMESTAMP, 0,
	    INIT_RXQ_EXT_IN_CRC_MODE, 0,
	    INIT_RXQ_EXT_IN_FLAG_PREFIX, 1,
	    INIT_RXQ_EXT_IN_FLAG_DISABLE_SCATTER, disable_scatter,
	    INIT_RXQ_EXT_IN_DMA_MODE,
	    dma_mode,
	    INIT_RXQ_EXT_IN_PACKED_STREAM_BUFF_SIZE, ps_bufsize,
	    INIT_RXQ_EXT_IN_FLAG_WANT_OUTER_CLASSES, want_outer_classes);
	MCDI_IN_SET_DWORD(req, INIT_RXQ_EXT_IN_OWNER_ID, 0);
	MCDI_IN_SET_DWORD(req, INIT_RXQ_EXT_IN_PORT_ID, EVB_PORT_ID_ASSIGNED);

	if (es_bufs_per_desc > 0) {
		MCDI_IN_SET_DWORD(req,
		    INIT_RXQ_V3_IN_ES_PACKET_BUFFERS_PER_BUCKET,
		    es_bufs_per_desc);
		MCDI_IN_SET_DWORD(req,
		    INIT_RXQ_V3_IN_ES_MAX_DMA_LEN, es_max_dma_len);
		MCDI_IN_SET_DWORD(req,
		    INIT_RXQ_V3_IN_ES_PACKET_STRIDE, es_buf_stride);
		MCDI_IN_SET_DWORD(req,
		    INIT_RXQ_V3_IN_ES_HEAD_OF_LINE_BLOCK_TIMEOUT,
		    hol_block_timeout);
	}

	dma_addr = MCDI_IN2(req, efx_qword_t, INIT_RXQ_IN_DMA_ADDR);
	addr = EFSYS_MEM_ADDR(esmp);

	for (i = 0; i < npages; i++) {
		EFX_POPULATE_QWORD_2(*dma_addr,
		    EFX_DWORD_1, (uint32_t)(addr >> 32),
		    EFX_DWORD_0, (uint32_t)(addr & 0xffffffff));

		dma_addr++;
		addr += EFX_BUF_SIZE;
	}

	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);
}

static	__checkReturn	efx_rc_t
efx_mcdi_fini_rxq(
	__in		efx_nic_t *enp,
	__in		uint32_t instance)
{
	efx_mcdi_req_t req;
	uint8_t payload[MAX(MC_CMD_FINI_RXQ_IN_LEN,
			    MC_CMD_FINI_RXQ_OUT_LEN)];
	efx_rc_t rc;

	(void) memset(payload, 0, sizeof (payload));
	req.emr_cmd = MC_CMD_FINI_RXQ;
	req.emr_in_buf = payload;
	req.emr_in_length = MC_CMD_FINI_RXQ_IN_LEN;
	req.emr_out_buf = payload;
	req.emr_out_length = MC_CMD_FINI_RXQ_OUT_LEN;

	MCDI_IN_SET_DWORD(req, FINI_RXQ_IN_INSTANCE, instance);

	efx_mcdi_execute_quiet(enp, &req);

	if (req.emr_rc != 0) {
		rc = req.emr_rc;
		goto fail1;
	}

	return (0);

fail1:
	/*
	 * EALREADY is not an error, but indicates that the MC has rebooted and
	 * that the RXQ has already been destroyed.
	 */
	if (rc != EALREADY)
		EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

#if EFSYS_OPT_RX_SCALE
static	__checkReturn	efx_rc_t
efx_mcdi_rss_context_alloc(
	__in		efx_nic_t *enp,
	__in		efx_rx_scale_context_type_t type,
	__in		uint32_t num_queues,
	__out		uint32_t *rss_contextp)
{
	efx_mcdi_req_t req;
	uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_ALLOC_IN_LEN,
			    MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN)];
	uint32_t rss_context;
	uint32_t context_type;
	efx_rc_t rc;

	if (num_queues > EFX_MAXRSS) {
		rc = EINVAL;
		goto fail1;
	}

	switch (type) {
	case EFX_RX_SCALE_EXCLUSIVE:
		context_type = MC_CMD_RSS_CONTEXT_ALLOC_IN_TYPE_EXCLUSIVE;
		break;
	case EFX_RX_SCALE_SHARED:
		context_type = MC_CMD_RSS_CONTEXT_ALLOC_IN_TYPE_SHARED;
		break;
	default:
		rc = EINVAL;
		goto fail2;
	}

	(void) memset(payload, 0, sizeof (payload));
	req.emr_cmd = MC_CMD_RSS_CONTEXT_ALLOC;
	req.emr_in_buf = payload;
	req.emr_in_length = MC_CMD_RSS_CONTEXT_ALLOC_IN_LEN;
	req.emr_out_buf = payload;
	req.emr_out_length = MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN;

	MCDI_IN_SET_DWORD(req, RSS_CONTEXT_ALLOC_IN_UPSTREAM_PORT_ID,
	    EVB_PORT_ID_ASSIGNED);
	MCDI_IN_SET_DWORD(req, RSS_CONTEXT_ALLOC_IN_TYPE, context_type);

	/*
	 * For exclusive contexts, NUM_QUEUES is only used to validate
	 * indirection table offsets.
	 * For shared contexts, the provided context will spread traffic over
	 * NUM_QUEUES many queues.
	 */
	MCDI_IN_SET_DWORD(req, RSS_CONTEXT_ALLOC_IN_NUM_QUEUES, num_queues);

	efx_mcdi_execute(enp, &req);

	if (req.emr_rc != 0) {
		rc = req.emr_rc;
		goto fail3;
	}

	if (req.emr_out_length_used < MC_CMD_RSS_CONTEXT_ALLOC_OUT_LEN) {
		rc = EMSGSIZE;
		goto fail4;
	}

	rss_context = MCDI_OUT_DWORD(req, RSS_CONTEXT_ALLOC_OUT_RSS_CONTEXT_ID);
	if (rss_context == EF10_RSS_CONTEXT_INVALID) {
		rc = ENOENT;
		goto fail5;
	}

	*rss_contextp = rss_context;

	return (0);

fail5:
	EFSYS_PROBE(fail5);
fail4:
	EFSYS_PROBE(fail4);
fail3:
	EFSYS_PROBE(fail3);
fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
static			efx_rc_t
efx_mcdi_rss_context_free(
	__in		efx_nic_t *enp,
	__in		uint32_t rss_context)
{
	efx_mcdi_req_t req;
	uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_FREE_IN_LEN,
			    MC_CMD_RSS_CONTEXT_FREE_OUT_LEN)];
	efx_rc_t rc;

	if (rss_context == EF10_RSS_CONTEXT_INVALID) {
		rc = EINVAL;
		goto fail1;
	}

	(void) memset(payload, 0, sizeof (payload));
	req.emr_cmd = MC_CMD_RSS_CONTEXT_FREE;
	req.emr_in_buf = payload;
	req.emr_in_length = MC_CMD_RSS_CONTEXT_FREE_IN_LEN;
	req.emr_out_buf = payload;
	req.emr_out_length = MC_CMD_RSS_CONTEXT_FREE_OUT_LEN;

	MCDI_IN_SET_DWORD(req, RSS_CONTEXT_FREE_IN_RSS_CONTEXT_ID, rss_context);

	efx_mcdi_execute_quiet(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);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
static			efx_rc_t
efx_mcdi_rss_context_set_flags(
	__in		efx_nic_t *enp,
	__in		uint32_t rss_context,
	__in		efx_rx_hash_type_t type)
{
	efx_nic_cfg_t *encp = &enp->en_nic_cfg;
	efx_rx_hash_type_t type_ipv4;
	efx_rx_hash_type_t type_ipv4_tcp;
	efx_rx_hash_type_t type_ipv6;
	efx_rx_hash_type_t type_ipv6_tcp;
	efx_rx_hash_type_t modes;
	efx_mcdi_req_t req;
	uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_LEN,
			    MC_CMD_RSS_CONTEXT_SET_FLAGS_OUT_LEN)];
	efx_rc_t rc;

	EFX_STATIC_ASSERT(EFX_RX_CLASS_IPV4_TCP_LBN ==
		    MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_TCP_IPV4_RSS_MODE_LBN);
	EFX_STATIC_ASSERT(EFX_RX_CLASS_IPV4_TCP_WIDTH ==
		    MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_TCP_IPV4_RSS_MODE_WIDTH);
	EFX_STATIC_ASSERT(EFX_RX_CLASS_IPV4_LBN ==
		    MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_OTHER_IPV4_RSS_MODE_LBN);
	EFX_STATIC_ASSERT(EFX_RX_CLASS_IPV4_WIDTH ==
		    MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_OTHER_IPV4_RSS_MODE_WIDTH);
	EFX_STATIC_ASSERT(EFX_RX_CLASS_IPV6_TCP_LBN ==
		    MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_TCP_IPV6_RSS_MODE_LBN);
	EFX_STATIC_ASSERT(EFX_RX_CLASS_IPV6_TCP_WIDTH ==
		    MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_TCP_IPV6_RSS_MODE_WIDTH);
	EFX_STATIC_ASSERT(EFX_RX_CLASS_IPV6_LBN ==
		    MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_OTHER_IPV6_RSS_MODE_LBN);
	EFX_STATIC_ASSERT(EFX_RX_CLASS_IPV6_WIDTH ==
		    MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_OTHER_IPV6_RSS_MODE_WIDTH);

	if (rss_context == EF10_RSS_CONTEXT_INVALID) {
		rc = EINVAL;
		goto fail1;
	}

	(void) memset(payload, 0, sizeof (payload));
	req.emr_cmd = MC_CMD_RSS_CONTEXT_SET_FLAGS;
	req.emr_in_buf = payload;
	req.emr_in_length = MC_CMD_RSS_CONTEXT_SET_FLAGS_IN_LEN;
	req.emr_out_buf = payload;
	req.emr_out_length = MC_CMD_RSS_CONTEXT_SET_FLAGS_OUT_LEN;

	MCDI_IN_SET_DWORD(req, RSS_CONTEXT_SET_FLAGS_IN_RSS_CONTEXT_ID,
	    rss_context);

	type_ipv4 = EFX_RX_HASH(IPV4, 2TUPLE) | EFX_RX_HASH(IPV4_TCP, 2TUPLE) |
		    EFX_RX_HASH(IPV4_UDP, 2TUPLE);
	type_ipv4_tcp = EFX_RX_HASH(IPV4_TCP, 4TUPLE);
	type_ipv6 = EFX_RX_HASH(IPV6, 2TUPLE) | EFX_RX_HASH(IPV6_TCP, 2TUPLE) |
		    EFX_RX_HASH(IPV6_UDP, 2TUPLE);
	type_ipv6_tcp = EFX_RX_HASH(IPV6_TCP, 4TUPLE);

	/*
	 * Create a copy of the original hash type.
	 * The copy will be used to fill in RSS_MODE bits and
	 * may be cleared beforehand. The original variable
	 * and, thus, EN bits will remain unaffected.
	 */
	modes = type;

	/*
	 * If the firmware lacks support for additional modes, RSS_MODE
	 * fields must contain zeros, otherwise the operation will fail.
	 */
	if (encp->enc_rx_scale_additional_modes_supported == B_FALSE)
		modes = 0;

#define	EXTRACT_RSS_MODE(_type, _class)		\
	(EFX_EXTRACT_NATIVE(_type, 0, 31,	\
	EFX_LOW_BIT(EFX_RX_CLASS_##_class),	\
	EFX_HIGH_BIT(EFX_RX_CLASS_##_class)) &	\
	EFX_MASK32(EFX_RX_CLASS_##_class))

	MCDI_IN_POPULATE_DWORD_10(req, RSS_CONTEXT_SET_FLAGS_IN_FLAGS,
	    RSS_CONTEXT_SET_FLAGS_IN_TOEPLITZ_IPV4_EN,
	    ((type & type_ipv4) == type_ipv4) ? 1 : 0,
	    RSS_CONTEXT_SET_FLAGS_IN_TOEPLITZ_TCPV4_EN,
	    ((type & type_ipv4_tcp) == type_ipv4_tcp) ? 1 : 0,
	    RSS_CONTEXT_SET_FLAGS_IN_TOEPLITZ_IPV6_EN,
	    ((type & type_ipv6) == type_ipv6) ? 1 : 0,
	    RSS_CONTEXT_SET_FLAGS_IN_TOEPLITZ_TCPV6_EN,
	    ((type & type_ipv6_tcp) == type_ipv6_tcp) ? 1 : 0,
	    RSS_CONTEXT_SET_FLAGS_IN_TCP_IPV4_RSS_MODE,
	    EXTRACT_RSS_MODE(modes, IPV4_TCP),
	    RSS_CONTEXT_SET_FLAGS_IN_UDP_IPV4_RSS_MODE,
	    EXTRACT_RSS_MODE(modes, IPV4_UDP),
	    RSS_CONTEXT_SET_FLAGS_IN_OTHER_IPV4_RSS_MODE,
	    EXTRACT_RSS_MODE(modes, IPV4),
	    RSS_CONTEXT_SET_FLAGS_IN_TCP_IPV6_RSS_MODE,
	    EXTRACT_RSS_MODE(modes, IPV6_TCP),
	    RSS_CONTEXT_SET_FLAGS_IN_UDP_IPV6_RSS_MODE,
	    EXTRACT_RSS_MODE(modes, IPV6_UDP),
	    RSS_CONTEXT_SET_FLAGS_IN_OTHER_IPV6_RSS_MODE,
	    EXTRACT_RSS_MODE(modes, IPV6));

#undef EXTRACT_RSS_MODE

	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);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
static			efx_rc_t
efx_mcdi_rss_context_set_key(
	__in		efx_nic_t *enp,
	__in		uint32_t rss_context,
	__in_ecount(n)	uint8_t *key,
	__in		size_t n)
{
	efx_mcdi_req_t req;
	uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_SET_KEY_IN_LEN,
			    MC_CMD_RSS_CONTEXT_SET_KEY_OUT_LEN)];
	efx_rc_t rc;

	if (rss_context == EF10_RSS_CONTEXT_INVALID) {
		rc = EINVAL;
		goto fail1;
	}

	(void) memset(payload, 0, sizeof (payload));
	req.emr_cmd = MC_CMD_RSS_CONTEXT_SET_KEY;
	req.emr_in_buf = payload;
	req.emr_in_length = MC_CMD_RSS_CONTEXT_SET_KEY_IN_LEN;
	req.emr_out_buf = payload;
	req.emr_out_length = MC_CMD_RSS_CONTEXT_SET_KEY_OUT_LEN;

	MCDI_IN_SET_DWORD(req, RSS_CONTEXT_SET_KEY_IN_RSS_CONTEXT_ID,
	    rss_context);

	EFSYS_ASSERT3U(n, ==, MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);
	if (n != MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN) {
		rc = EINVAL;
		goto fail2;
	}

	memcpy(MCDI_IN2(req, uint8_t, RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY),
	    key, n);

	efx_mcdi_execute(enp, &req);

	if (req.emr_rc != 0) {
		rc = req.emr_rc;
		goto fail3;
	}

	return (0);

fail3:
	EFSYS_PROBE(fail3);
fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
static			efx_rc_t
efx_mcdi_rss_context_set_table(
	__in		efx_nic_t *enp,
	__in		uint32_t rss_context,
	__in_ecount(n)	unsigned int *table,
	__in		size_t n)
{
	efx_mcdi_req_t req;
	uint8_t payload[MAX(MC_CMD_RSS_CONTEXT_SET_TABLE_IN_LEN,
			    MC_CMD_RSS_CONTEXT_SET_TABLE_OUT_LEN)];
	uint8_t *req_table;
	int i, rc;

	if (rss_context == EF10_RSS_CONTEXT_INVALID) {
		rc = EINVAL;
		goto fail1;
	}

	(void) memset(payload, 0, sizeof (payload));
	req.emr_cmd = MC_CMD_RSS_CONTEXT_SET_TABLE;
	req.emr_in_buf = payload;
	req.emr_in_length = MC_CMD_RSS_CONTEXT_SET_TABLE_IN_LEN;
	req.emr_out_buf = payload;
	req.emr_out_length = MC_CMD_RSS_CONTEXT_SET_TABLE_OUT_LEN;

	MCDI_IN_SET_DWORD(req, RSS_CONTEXT_SET_TABLE_IN_RSS_CONTEXT_ID,
	    rss_context);

	req_table =
	    MCDI_IN2(req, uint8_t, RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE);

	for (i = 0;
	    i < MC_CMD_RSS_CONTEXT_SET_TABLE_IN_INDIRECTION_TABLE_LEN;
	    i++) {
		req_table[i] = (n > 0) ? (uint8_t)table[i % n] : 0;
	}

	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);
}
#endif /* EFSYS_OPT_RX_SCALE */


	__checkReturn	efx_rc_t
ef10_rx_init(
	__in		efx_nic_t *enp)
{
#if EFSYS_OPT_RX_SCALE

	if (efx_mcdi_rss_context_alloc(enp, EFX_RX_SCALE_EXCLUSIVE, EFX_MAXRSS,
		&enp->en_rss_context) == 0) {
		/*
		 * Allocated an exclusive RSS context, which allows both the
		 * indirection table and key to be modified.
		 */
		enp->en_rss_context_type = EFX_RX_SCALE_EXCLUSIVE;
		enp->en_hash_support = EFX_RX_HASH_AVAILABLE;
	} else {
		/*
		 * Failed to allocate an exclusive RSS context. Continue
		 * operation without support for RSS. The pseudo-header in
		 * received packets will not contain a Toeplitz hash value.
		 */
		enp->en_rss_context_type = EFX_RX_SCALE_UNAVAILABLE;
		enp->en_hash_support = EFX_RX_HASH_UNAVAILABLE;
	}

#endif /* EFSYS_OPT_RX_SCALE */

	return (0);
}

#if EFSYS_OPT_RX_SCATTER
	__checkReturn	efx_rc_t
ef10_rx_scatter_enable(
	__in		efx_nic_t *enp,
	__in		unsigned int buf_size)
{
	_NOTE(ARGUNUSED(enp, buf_size))
	return (0);
}
#endif	/* EFSYS_OPT_RX_SCATTER */

#if EFSYS_OPT_RX_SCALE
	__checkReturn	efx_rc_t
ef10_rx_scale_context_alloc(
	__in		efx_nic_t *enp,
	__in		efx_rx_scale_context_type_t type,
	__in		uint32_t num_queues,
	__out		uint32_t *rss_contextp)
{
	efx_rc_t rc;

	rc = efx_mcdi_rss_context_alloc(enp, type, num_queues, rss_contextp);
	if (rc != 0)
		goto fail1;

	return (0);

fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);
	return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
	__checkReturn	efx_rc_t
ef10_rx_scale_context_free(
	__in		efx_nic_t *enp,
	__in		uint32_t rss_context)
{
	efx_rc_t rc;

	rc = efx_mcdi_rss_context_free(enp, rss_context);
	if (rc != 0)
		goto fail1;

	return (0);

fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);
	return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
	__checkReturn	efx_rc_t
ef10_rx_scale_mode_set(
	__in		efx_nic_t *enp,
	__in		uint32_t rss_context,
	__in		efx_rx_hash_alg_t alg,
	__in		efx_rx_hash_type_t type,
	__in		boolean_t insert)
{
	efx_nic_cfg_t *encp = &enp->en_nic_cfg;
	efx_rc_t rc;

	EFSYS_ASSERT3U(insert, ==, B_TRUE);

	if ((encp->enc_rx_scale_hash_alg_mask & (1U << alg)) == 0 ||
	    insert == B_FALSE) {
		rc = EINVAL;
		goto fail1;
	}

	if (rss_context == EFX_RSS_CONTEXT_DEFAULT) {
		if (enp->en_rss_context_type == EFX_RX_SCALE_UNAVAILABLE) {
			rc = ENOTSUP;
			goto fail2;
		}
		rss_context = enp->en_rss_context;
	}

	if ((rc = efx_mcdi_rss_context_set_flags(enp,
		    rss_context, type)) != 0)
		goto fail3;

	return (0);

fail3:
	EFSYS_PROBE(fail3);
fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
	__checkReturn	efx_rc_t
ef10_rx_scale_key_set(
	__in		efx_nic_t *enp,
	__in		uint32_t rss_context,
	__in_ecount(n)	uint8_t *key,
	__in		size_t n)
{
	efx_rc_t rc;

	EFX_STATIC_ASSERT(EFX_RSS_KEY_SIZE ==
	    MC_CMD_RSS_CONTEXT_SET_KEY_IN_TOEPLITZ_KEY_LEN);

	if (rss_context == EFX_RSS_CONTEXT_DEFAULT) {
		if (enp->en_rss_context_type == EFX_RX_SCALE_UNAVAILABLE) {
			rc = ENOTSUP;
			goto fail1;
		}
		rss_context = enp->en_rss_context;
	}

	if ((rc = efx_mcdi_rss_context_set_key(enp, rss_context, key, n)) != 0)
		goto fail2;

	return (0);

fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_SCALE
	__checkReturn	efx_rc_t
ef10_rx_scale_tbl_set(
	__in		efx_nic_t *enp,
	__in		uint32_t rss_context,
	__in_ecount(n)	unsigned int *table,
	__in		size_t n)
{
	efx_rc_t rc;


	if (rss_context == EFX_RSS_CONTEXT_DEFAULT) {
		if (enp->en_rss_context_type == EFX_RX_SCALE_UNAVAILABLE) {
			rc = ENOTSUP;
			goto fail1;
		}
		rss_context = enp->en_rss_context;
	}

	if ((rc = efx_mcdi_rss_context_set_table(enp,
		    rss_context, table, n)) != 0)
		goto fail2;

	return (0);

fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}
#endif /* EFSYS_OPT_RX_SCALE */


/*
 * EF10 RX pseudo-header
 * ---------------------
 *
 * Receive packets are prefixed by an (optional) 14 byte pseudo-header:
 *
 *  +00: Toeplitz hash value.
 *       (32bit little-endian)
 *  +04: Outer VLAN tag. Zero if the packet did not have an outer VLAN tag.
 *       (16bit big-endian)
 *  +06: Inner VLAN tag. Zero if the packet did not have an inner VLAN tag.
 *       (16bit big-endian)
 *  +08: Packet Length. Zero if the RX datapath was in cut-through mode.
 *       (16bit little-endian)
 *  +10: MAC timestamp. Zero if timestamping is not enabled.
 *       (32bit little-endian)
 *
 * See "The RX Pseudo-header" in SF-109306-TC.
 */

	__checkReturn	efx_rc_t
ef10_rx_prefix_pktlen(
	__in		efx_nic_t *enp,
	__in		uint8_t *buffer,
	__out		uint16_t *lengthp)
{
	_NOTE(ARGUNUSED(enp))

	/*
	 * The RX pseudo-header contains the packet length, excluding the
	 * pseudo-header. If the hardware receive datapath was operating in
	 * cut-through mode then the length in the RX pseudo-header will be
	 * zero, and the packet length must be obtained from the DMA length
	 * reported in the RX event.
	 */
	*lengthp = buffer[8] | (buffer[9] << 8);
	return (0);
}

#if EFSYS_OPT_RX_SCALE
	__checkReturn	uint32_t
ef10_rx_prefix_hash(
	__in		efx_nic_t *enp,
	__in		efx_rx_hash_alg_t func,
	__in		uint8_t *buffer)
{
	_NOTE(ARGUNUSED(enp))

	switch (func) {
	case EFX_RX_HASHALG_PACKED_STREAM:
	case EFX_RX_HASHALG_TOEPLITZ:
		return (buffer[0] |
		    (buffer[1] << 8) |
		    (buffer[2] << 16) |
		    (buffer[3] << 24));

	default:
		EFSYS_ASSERT(0);
		return (0);
	}
}
#endif /* EFSYS_OPT_RX_SCALE */

#if EFSYS_OPT_RX_PACKED_STREAM
/*
 * Fake length for RXQ descriptors in packed stream mode
 * to make hardware happy
 */
#define	EFX_RXQ_PACKED_STREAM_FAKE_BUF_SIZE 32
#endif

				void
ef10_rx_qpost(
	__in			efx_rxq_t *erp,
	__in_ecount(ndescs)	efsys_dma_addr_t *addrp,
	__in			size_t size,
	__in			unsigned int ndescs,
	__in			unsigned int completed,
	__in			unsigned int added)
{
	efx_qword_t qword;
	unsigned int i;
	unsigned int offset;
	unsigned int id;

	_NOTE(ARGUNUSED(completed))

#if EFSYS_OPT_RX_PACKED_STREAM
	/*
	 * Real size of the buffer does not fit into ESF_DZ_RX_KER_BYTE_CNT
	 * and equal to 0 after applying mask. Hardware does not like it.
	 */
	if (erp->er_ev_qstate->eers_rx_packed_stream)
		size = EFX_RXQ_PACKED_STREAM_FAKE_BUF_SIZE;
#endif

	/* The client driver must not overfill the queue */
	EFSYS_ASSERT3U(added - completed + ndescs, <=,
	    EFX_RXQ_LIMIT(erp->er_mask + 1));

	id = added & (erp->er_mask);
	for (i = 0; i < ndescs; i++) {
		EFSYS_PROBE4(rx_post, unsigned int, erp->er_index,
		    unsigned int, id, efsys_dma_addr_t, addrp[i],
		    size_t, size);

		EFX_POPULATE_QWORD_3(qword,
		    ESF_DZ_RX_KER_BYTE_CNT, (uint32_t)(size),
		    ESF_DZ_RX_KER_BUF_ADDR_DW0,
		    (uint32_t)(addrp[i] & 0xffffffff),
		    ESF_DZ_RX_KER_BUF_ADDR_DW1,
		    (uint32_t)(addrp[i] >> 32));

		offset = id * sizeof (efx_qword_t);
		EFSYS_MEM_WRITEQ(erp->er_esmp, offset, &qword);

		id = (id + 1) & (erp->er_mask);
	}
}

			void
ef10_rx_qpush(
	__in	efx_rxq_t *erp,
	__in	unsigned int added,
	__inout	unsigned int *pushedp)
{
	efx_nic_t *enp = erp->er_enp;
	unsigned int pushed = *pushedp;
	uint32_t wptr;
	efx_dword_t dword;

	/* Hardware has alignment restriction for WPTR */
	wptr = P2ALIGN(added, EF10_RX_WPTR_ALIGN);
	if (pushed == wptr)
		return;

	*pushedp = wptr;

	/* Push the populated descriptors out */
	wptr &= erp->er_mask;

	EFX_POPULATE_DWORD_1(dword, ERF_DZ_RX_DESC_WPTR, wptr);

	/* Guarantee ordering of memory (descriptors) and PIO (doorbell) */
	EFX_DMA_SYNC_QUEUE_FOR_DEVICE(erp->er_esmp, erp->er_mask + 1,
	    wptr, pushed & erp->er_mask);
	EFSYS_PIO_WRITE_BARRIER();
	EFX_BAR_VI_WRITED(enp, ER_DZ_RX_DESC_UPD_REG,
	    erp->er_index, &dword, B_FALSE);
}

#if EFSYS_OPT_RX_PACKED_STREAM

			void
ef10_rx_qpush_ps_credits(
	__in		efx_rxq_t *erp)
{
	efx_nic_t *enp = erp->er_enp;
	efx_dword_t dword;
	efx_evq_rxq_state_t *rxq_state = erp->er_ev_qstate;
	uint32_t credits;

	EFSYS_ASSERT(rxq_state->eers_rx_packed_stream);

	if (rxq_state->eers_rx_packed_stream_credits == 0)
		return;

	/*
	 * It is a bug if we think that FW has utilized more
	 * credits than it is allowed to have (maximum). However,
	 * make sure that we do not credit more than maximum anyway.
	 */
	credits = MIN(rxq_state->eers_rx_packed_stream_credits,
	    EFX_RX_PACKED_STREAM_MAX_CREDITS);
	EFX_POPULATE_DWORD_3(dword,
	    ERF_DZ_RX_DESC_MAGIC_DOORBELL, 1,
	    ERF_DZ_RX_DESC_MAGIC_CMD,
	    ERE_DZ_RX_DESC_MAGIC_CMD_PS_CREDITS,
	    ERF_DZ_RX_DESC_MAGIC_DATA, credits);
	EFX_BAR_VI_WRITED(enp, ER_DZ_RX_DESC_UPD_REG,
	    erp->er_index, &dword, B_FALSE);

	rxq_state->eers_rx_packed_stream_credits = 0;
}

/*
 * In accordance with SF-112241-TC the received data has the following layout:
 *  - 8 byte pseudo-header which consist of:
 *    - 4 byte little-endian timestamp
 *    - 2 byte little-endian captured length in bytes
 *    - 2 byte little-endian original packet length in bytes
 *  - captured packet bytes
 *  - optional padding to align to 64 bytes boundary
 *  - 64 bytes scratch space for the host software
 */
	__checkReturn	uint8_t *
ef10_rx_qps_packet_info(
	__in		efx_rxq_t *erp,
	__in		uint8_t *buffer,
	__in		uint32_t buffer_length,
	__in		uint32_t current_offset,
	__out		uint16_t *lengthp,
	__out		uint32_t *next_offsetp,
	__out		uint32_t *timestamp)
{
	uint16_t buf_len;
	uint8_t *pkt_start;
	efx_qword_t *qwordp;
	efx_evq_rxq_state_t *rxq_state = erp->er_ev_qstate;

	EFSYS_ASSERT(rxq_state->eers_rx_packed_stream);

	buffer += current_offset;
	pkt_start = buffer + EFX_RX_PACKED_STREAM_RX_PREFIX_SIZE;

	qwordp = (efx_qword_t *)buffer;
	*timestamp = EFX_QWORD_FIELD(*qwordp, ES_DZ_PS_RX_PREFIX_TSTAMP);
	*lengthp   = EFX_QWORD_FIELD(*qwordp, ES_DZ_PS_RX_PREFIX_ORIG_LEN);
	buf_len    = EFX_QWORD_FIELD(*qwordp, ES_DZ_PS_RX_PREFIX_CAP_LEN);

	buf_len = P2ROUNDUP(buf_len + EFX_RX_PACKED_STREAM_RX_PREFIX_SIZE,
			    EFX_RX_PACKED_STREAM_ALIGNMENT);
	*next_offsetp =
	    current_offset + buf_len + EFX_RX_PACKED_STREAM_ALIGNMENT;

	EFSYS_ASSERT3U(*next_offsetp, <=, buffer_length);
	EFSYS_ASSERT3U(current_offset + *lengthp, <, *next_offsetp);

	if ((*next_offsetp ^ current_offset) &
	    EFX_RX_PACKED_STREAM_MEM_PER_CREDIT)
		rxq_state->eers_rx_packed_stream_credits++;

	return (pkt_start);
}


#endif

	__checkReturn	efx_rc_t
ef10_rx_qflush(
	__in	efx_rxq_t *erp)
{
	efx_nic_t *enp = erp->er_enp;
	efx_rc_t rc;

	if ((rc = efx_mcdi_fini_rxq(enp, erp->er_index)) != 0)
		goto fail1;

	return (0);

fail1:
	/*
	 * EALREADY is not an error, but indicates that the MC has rebooted and
	 * that the RXQ has already been destroyed. Callers need to know that
	 * the RXQ flush has completed to avoid waiting until timeout for a
	 * flush done event that will not be delivered.
	 */
	if (rc != EALREADY)
		EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

		void
ef10_rx_qenable(
	__in	efx_rxq_t *erp)
{
	/* FIXME */
	_NOTE(ARGUNUSED(erp))
	/* FIXME */
}

	__checkReturn	efx_rc_t
ef10_rx_qcreate(
	__in		efx_nic_t *enp,
	__in		unsigned int index,
	__in		unsigned int label,
	__in		efx_rxq_type_t type,
	__in		const efx_rxq_type_data_t *type_data,
	__in		efsys_mem_t *esmp,
	__in		size_t ndescs,
	__in		uint32_t id,
	__in		unsigned int flags,
	__in		efx_evq_t *eep,
	__in		efx_rxq_t *erp)
{
	efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
	efx_rc_t rc;
	boolean_t disable_scatter;
	boolean_t want_inner_classes;
	unsigned int ps_buf_size;
	uint32_t es_bufs_per_desc = 0;
	uint32_t es_max_dma_len = 0;
	uint32_t es_buf_stride = 0;
	uint32_t hol_block_timeout = 0;

	_NOTE(ARGUNUSED(id, erp, type_data))

	EFX_STATIC_ASSERT(EFX_EV_RX_NLABELS == (1 << ESF_DZ_RX_QLABEL_WIDTH));
	EFSYS_ASSERT3U(label, <, EFX_EV_RX_NLABELS);
	EFSYS_ASSERT3U(enp->en_rx_qcount + 1, <, encp->enc_rxq_limit);

	EFX_STATIC_ASSERT(ISP2(EFX_RXQ_MAXNDESCS));
	EFX_STATIC_ASSERT(ISP2(EFX_RXQ_MINNDESCS));

	if (!ISP2(ndescs) ||
	    (ndescs < EFX_RXQ_MINNDESCS) || (ndescs > EFX_RXQ_MAXNDESCS)) {
		rc = EINVAL;
		goto fail1;
	}
	if (index >= encp->enc_rxq_limit) {
		rc = EINVAL;
		goto fail2;
	}

	switch (type) {
	case EFX_RXQ_TYPE_DEFAULT:
		ps_buf_size = 0;
		break;
#if EFSYS_OPT_RX_PACKED_STREAM
	case EFX_RXQ_TYPE_PACKED_STREAM:
		switch (type_data->ertd_packed_stream.eps_buf_size) {
		case EFX_RXQ_PACKED_STREAM_BUF_SIZE_1M:
			ps_buf_size = MC_CMD_INIT_RXQ_EXT_IN_PS_BUFF_1M;
			break;
		case EFX_RXQ_PACKED_STREAM_BUF_SIZE_512K:
			ps_buf_size = MC_CMD_INIT_RXQ_EXT_IN_PS_BUFF_512K;
			break;
		case EFX_RXQ_PACKED_STREAM_BUF_SIZE_256K:
			ps_buf_size = MC_CMD_INIT_RXQ_EXT_IN_PS_BUFF_256K;
			break;
		case EFX_RXQ_PACKED_STREAM_BUF_SIZE_128K:
			ps_buf_size = MC_CMD_INIT_RXQ_EXT_IN_PS_BUFF_128K;
			break;
		case EFX_RXQ_PACKED_STREAM_BUF_SIZE_64K:
			ps_buf_size = MC_CMD_INIT_RXQ_EXT_IN_PS_BUFF_64K;
			break;
		default:
			rc = ENOTSUP;
			goto fail3;
		}
		break;
#endif /* EFSYS_OPT_RX_PACKED_STREAM */
#if EFSYS_OPT_RX_ES_SUPER_BUFFER
	case EFX_RXQ_TYPE_ES_SUPER_BUFFER:
		ps_buf_size = 0;
		es_bufs_per_desc =
		    type_data->ertd_es_super_buffer.eessb_bufs_per_desc;
		es_max_dma_len =
		    type_data->ertd_es_super_buffer.eessb_max_dma_len;
		es_buf_stride =
		    type_data->ertd_es_super_buffer.eessb_buf_stride;
		hol_block_timeout =
		    type_data->ertd_es_super_buffer.eessb_hol_block_timeout;
		break;
#endif /* EFSYS_OPT_RX_ES_SUPER_BUFFER */
	default:
		rc = ENOTSUP;
		goto fail4;
	}

#if EFSYS_OPT_RX_PACKED_STREAM
	if (ps_buf_size != 0) {
		/* Check if datapath firmware supports packed stream mode */
		if (encp->enc_rx_packed_stream_supported == B_FALSE) {
			rc = ENOTSUP;
			goto fail5;
		}
		/* Check if packed stream allows configurable buffer sizes */
		if ((ps_buf_size != MC_CMD_INIT_RXQ_EXT_IN_PS_BUFF_1M) &&
		    (encp->enc_rx_var_packed_stream_supported == B_FALSE)) {
			rc = ENOTSUP;
			goto fail6;
		}
	}
#else /* EFSYS_OPT_RX_PACKED_STREAM */
	EFSYS_ASSERT(ps_buf_size == 0);
#endif /* EFSYS_OPT_RX_PACKED_STREAM */

#if EFSYS_OPT_RX_ES_SUPER_BUFFER
	if (es_bufs_per_desc > 0) {
		if (encp->enc_rx_es_super_buffer_supported == B_FALSE) {
			rc = ENOTSUP;
			goto fail7;
		}
		if (!IS_P2ALIGNED(es_max_dma_len,
			    EFX_RX_ES_SUPER_BUFFER_BUF_ALIGNMENT)) {
			rc = EINVAL;
			goto fail8;
		}
		if (!IS_P2ALIGNED(es_buf_stride,
			    EFX_RX_ES_SUPER_BUFFER_BUF_ALIGNMENT)) {
			rc = EINVAL;
			goto fail9;
		}
	}
#else /* EFSYS_OPT_RX_ES_SUPER_BUFFER */
	EFSYS_ASSERT(es_bufs_per_desc == 0);
#endif /* EFSYS_OPT_RX_ES_SUPER_BUFFER */

	/* Scatter can only be disabled if the firmware supports doing so */
	if (flags & EFX_RXQ_FLAG_SCATTER)
		disable_scatter = B_FALSE;
	else
		disable_scatter = encp->enc_rx_disable_scatter_supported;

	if (flags & EFX_RXQ_FLAG_INNER_CLASSES)
		want_inner_classes = B_TRUE;
	else
		want_inner_classes = B_FALSE;

	if ((rc = efx_mcdi_init_rxq(enp, ndescs, eep->ee_index, label, index,
		    esmp, disable_scatter, want_inner_classes,
		    ps_buf_size, es_bufs_per_desc, es_max_dma_len,
		    es_buf_stride, hol_block_timeout)) != 0)
		goto fail10;

	erp->er_eep = eep;
	erp->er_label = label;

	ef10_ev_rxlabel_init(eep, erp, label, type);

	erp->er_ev_qstate = &erp->er_eep->ee_rxq_state[label];

	return (0);

fail10:
	EFSYS_PROBE(fail10);
#if EFSYS_OPT_RX_ES_SUPER_BUFFER
fail9:
	EFSYS_PROBE(fail9);
fail8:
	EFSYS_PROBE(fail8);
fail7:
	EFSYS_PROBE(fail7);
#endif /* EFSYS_OPT_RX_ES_SUPER_BUFFER */
#if EFSYS_OPT_RX_PACKED_STREAM
fail6:
	EFSYS_PROBE(fail6);
fail5:
	EFSYS_PROBE(fail5);
#endif /* EFSYS_OPT_RX_PACKED_STREAM */
fail4:
	EFSYS_PROBE(fail4);
#if EFSYS_OPT_RX_PACKED_STREAM
fail3:
	EFSYS_PROBE(fail3);
#endif /* EFSYS_OPT_RX_PACKED_STREAM */
fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

		void
ef10_rx_qdestroy(
	__in	efx_rxq_t *erp)
{
	efx_nic_t *enp = erp->er_enp;
	efx_evq_t *eep = erp->er_eep;
	unsigned int label = erp->er_label;

	ef10_ev_rxlabel_fini(eep, label);

	EFSYS_ASSERT(enp->en_rx_qcount != 0);
	--enp->en_rx_qcount;

	EFSYS_KMEM_FREE(enp->en_esip, sizeof (efx_rxq_t), erp);
}

		void
ef10_rx_fini(
	__in	efx_nic_t *enp)
{
#if EFSYS_OPT_RX_SCALE
	if (enp->en_rss_context_type != EFX_RX_SCALE_UNAVAILABLE)
		(void) efx_mcdi_rss_context_free(enp, enp->en_rss_context);
	enp->en_rss_context = 0;
	enp->en_rss_context_type = EFX_RX_SCALE_UNAVAILABLE;
#else
	_NOTE(ARGUNUSED(enp))
#endif /* EFSYS_OPT_RX_SCALE */
}

#endif /* EFSYS_OPT_HUNTINGTON || EFSYS_OPT_MEDFORD || EFSYS_OPT_MEDFORD2 */