1 files changed, 354 insertions, 0 deletions
diff --git a/sys/dev/sfxge/common/siena_mcdi.c b/sys/dev/sfxge/common/siena_mcdi.c
new file mode 100644
index 0000000..b2224ac
--- /dev/null
+++ b/sys/dev/sfxge/common/siena_mcdi.c
@@ -0,0 +1,354 @@
+/*-
+ * Copyright (c) 2012-2015 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "efsys.h"
+#include "efx.h"
+#include "efx_impl.h"
+
+#if EFSYS_OPT_SIENA && EFSYS_OPT_MCDI
+
+#define	SIENA_MCDI_PDU(_emip)			\
+	(((emip)->emi_port == 1)		\
+	? MC_SMEM_P0_PDU_OFST >> 2		\
+	: MC_SMEM_P1_PDU_OFST >> 2)
+
+#define	SIENA_MCDI_DOORBELL(_emip)		\
+	(((emip)->emi_port == 1)		\
+	? MC_SMEM_P0_DOORBELL_OFST >> 2		\
+	: MC_SMEM_P1_DOORBELL_OFST >> 2)
+
+#define	SIENA_MCDI_STATUS(_emip)		\
+	(((emip)->emi_port == 1)		\
+	? MC_SMEM_P0_STATUS_OFST >> 2		\
+	: MC_SMEM_P1_STATUS_OFST >> 2)
+
+
+			void
+siena_mcdi_request_copyin(
+	__in		efx_nic_t *enp,
+	__in		efx_mcdi_req_t *emrp,
+	__in		unsigned int seq,
+	__in		boolean_t ev_cpl,
+	__in		boolean_t new_epoch)
+{
+	efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
+	efx_dword_t dword;
+	unsigned int xflags;
+	unsigned int pdur;
+	unsigned int dbr;
+	unsigned int pos;
+
+	EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA);
+	_NOTE(ARGUNUSED(new_epoch))
+
+	EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2);
+	pdur = SIENA_MCDI_PDU(emip);
+	dbr = SIENA_MCDI_DOORBELL(emip);
+
+	xflags = 0;
+	if (ev_cpl)
+		xflags |= MCDI_HEADER_XFLAGS_EVREQ;
+
+	/* Construct the header in shared memory */
+	EFX_POPULATE_DWORD_6(dword,
+			    MCDI_HEADER_CODE, emrp->emr_cmd,
+			    MCDI_HEADER_RESYNC, 1,
+			    MCDI_HEADER_DATALEN, emrp->emr_in_length,
+			    MCDI_HEADER_SEQ, seq,
+			    MCDI_HEADER_RESPONSE, 0,
+			    MCDI_HEADER_XFLAGS, xflags);
+	EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, pdur, &dword, B_TRUE);
+
+	for (pos = 0; pos < emrp->emr_in_length; pos += sizeof (efx_dword_t)) {
+		memcpy(&dword, MCDI_IN(*emrp, efx_dword_t, pos),
+		    MIN(sizeof (dword), emrp->emr_in_length - pos));
+		EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM,
+		    pdur + 1 + (pos >> 2), &dword, B_FALSE);
+	}
+
+	/* Ring the doorbell */
+	EFX_POPULATE_DWORD_1(dword, EFX_DWORD_0, 0xd004be11);
+	EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, dbr, &dword, B_FALSE);
+}
+
+			void
+siena_mcdi_request_copyout(
+	__in		efx_nic_t *enp,
+	__in		efx_mcdi_req_t *emrp)
+{
+	efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
+	unsigned int pos;
+	unsigned int pdur;
+	efx_dword_t data;
+
+	pdur = SIENA_MCDI_PDU(emip);
+
+	/* Copy payload out if caller supplied buffer */
+	if (emrp->emr_out_buf != NULL) {
+		size_t bytes = MIN(emrp->emr_out_length_used,
+				    emrp->emr_out_length);
+		for (pos = 0; pos < bytes; pos += sizeof (efx_dword_t)) {
+			EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM,
+			    pdur + 1 + (pos >> 2), &data, B_FALSE);
+			memcpy(MCDI_OUT(*emrp, efx_dword_t, pos), &data,
+			    MIN(sizeof (data), bytes - pos));
+		}
+	}
+}
+
+			int
+siena_mcdi_poll_reboot(
+	__in		efx_nic_t *enp)
+{
+#ifndef EFX_GRACEFUL_MC_REBOOT
+ 	/*
+	 * This function is not being used properly.
+	 * Until its callers are fixed, it should always return 0.
+	 */
+	_NOTE(ARGUNUSED(enp))
+	return (0);
+#else
+	efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
+	unsigned int rebootr;
+	efx_dword_t dword;
+	uint32_t value;
+
+	EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA);
+	EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2);
+	rebootr = SIENA_MCDI_STATUS(emip);
+
+	EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM, rebootr, &dword, B_FALSE);
+	value = EFX_DWORD_FIELD(dword, EFX_DWORD_0);
+
+	if (value == 0)
+		return (0);
+
+	EFX_ZERO_DWORD(dword);
+	EFX_BAR_TBL_WRITED(enp, FR_CZ_MC_TREG_SMEM, rebootr, &dword, B_FALSE);
+
+	if (value == MC_STATUS_DWORD_ASSERT)
+		return (EINTR);
+	else
+		return (EIO);
+#endif
+}
+
+	__checkReturn	boolean_t
+siena_mcdi_request_poll(
+	__in		efx_nic_t *enp)
+{
+	efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
+	efx_mcdi_req_t *emrp;
+	efx_dword_t dword;
+	unsigned int pdur;
+	unsigned int seq;
+	unsigned int length;
+	int state;
+	int rc;
+
+	EFSYS_ASSERT3U(enp->en_family, ==, EFX_FAMILY_SIENA);
+
+	/* Serialise against post-watchdog efx_mcdi_ev* */
+	EFSYS_LOCK(enp->en_eslp, state);
+
+	EFSYS_ASSERT(emip->emi_pending_req != NULL);
+	EFSYS_ASSERT(!emip->emi_ev_cpl);
+	emrp = emip->emi_pending_req;
+
+	/* Check for reboot atomically w.r.t efx_mcdi_request_start */
+	if (emip->emi_poll_cnt++ == 0) {
+		if ((rc = siena_mcdi_poll_reboot(enp)) != 0) {
+			emip->emi_pending_req = NULL;
+			EFSYS_UNLOCK(enp->en_eslp, state);
+
+			goto fail1;
+		}
+	}
+
+	EFSYS_ASSERT(emip->emi_port == 1 || emip->emi_port == 2);
+	pdur = SIENA_MCDI_PDU(emip);
+
+	/* Read the command header */
+	EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM, pdur, &dword, B_FALSE);
+	if (EFX_DWORD_FIELD(dword, MCDI_HEADER_RESPONSE) == 0) {
+		EFSYS_UNLOCK(enp->en_eslp, state);
+		return (B_FALSE);
+	}
+
+	/* Request complete */
+	emip->emi_pending_req = NULL;
+	seq = (emip->emi_seq - 1) & EFX_MASK32(MCDI_HEADER_SEQ);
+
+	/* Check for synchronous reboot */
+	if (EFX_DWORD_FIELD(dword, MCDI_HEADER_ERROR) != 0 &&
+	    EFX_DWORD_FIELD(dword, MCDI_HEADER_DATALEN) == 0) {
+		/* Consume status word */
+		EFSYS_SPIN(EFX_MCDI_STATUS_SLEEP_US);
+		siena_mcdi_poll_reboot(enp);
+		EFSYS_UNLOCK(enp->en_eslp, state);
+		rc = EIO;
+		goto fail2;
+	}
+
+	EFSYS_UNLOCK(enp->en_eslp, state);
+
+	/* Check that the returned data is consistent */
+	if (EFX_DWORD_FIELD(dword, MCDI_HEADER_CODE) != emrp->emr_cmd ||
+	    EFX_DWORD_FIELD(dword, MCDI_HEADER_SEQ) != seq) {
+		/* Response is for a different request */
+		rc = EIO;
+		goto fail3;
+	}
+
+	length = EFX_DWORD_FIELD(dword, MCDI_HEADER_DATALEN);
+	if (EFX_DWORD_FIELD(dword, MCDI_HEADER_ERROR)) {
+		efx_dword_t errdword;
+		int errcode;
+
+		EFSYS_ASSERT3U(length, ==, 4);
+		EFX_BAR_TBL_READD(enp, FR_CZ_MC_TREG_SMEM,
+		    pdur + 1 + (MC_CMD_ERR_CODE_OFST >> 2),
+		    &errdword, B_FALSE);
+		errcode = EFX_DWORD_FIELD(errdword, EFX_DWORD_0);
+		rc = efx_mcdi_request_errcode(errcode);
+		if (!emrp->emr_quiet) {
+			EFSYS_PROBE2(mcdi_err, int, emrp->emr_cmd,
+			    int, errcode);
+		}
+		goto fail4;
+
+	} else {
+		emrp->emr_out_length_used = length;
+		emrp->emr_rc = 0;
+		siena_mcdi_request_copyout(enp, emrp);
+	}
+
+	goto out;
+
+fail4:
+	if (!emrp->emr_quiet)
+		EFSYS_PROBE(fail4);
+fail3:
+	if (!emrp->emr_quiet)
+		EFSYS_PROBE(fail3);
+fail2:
+	if (!emrp->emr_quiet)
+		EFSYS_PROBE(fail2);
+fail1:
+	if (!emrp->emr_quiet)
+		EFSYS_PROBE1(fail1, int, rc);
+
+	/* Fill out error state */
+	emrp->emr_rc = rc;
+	emrp->emr_out_length_used = 0;
+
+	/* Reboot/Assertion */
+	if (rc == EIO || rc == EINTR)
+		efx_mcdi_raise_exception(enp, emrp, rc);
+
+out:
+	return (B_TRUE);
+}
+
+	__checkReturn	int
+siena_mcdi_init(
+	__in		efx_nic_t *enp,
+	__in		const efx_mcdi_transport_t *mtp)
+{
+	efx_mcdi_iface_t *emip = &(enp->en_mcdi.em_emip);
+	efx_oword_t oword;
+	unsigned int portnum;
+	int rc;
+
+	EFSYS_ASSERT(enp->en_family == EFX_FAMILY_SIENA);
+
+	/* Determine the port number to use for MCDI */
+	EFX_BAR_READO(enp, FR_AZ_CS_DEBUG_REG, &oword);
+	portnum = EFX_OWORD_FIELD(oword, FRF_CZ_CS_PORT_NUM);
+
+	if (portnum == 0) {
+		/* Presumably booted from ROM; only MCDI port 1 will work */
+		emip->emi_port = 1;
+	} else if (portnum <= 2) {
+		emip->emi_port = portnum;
+	} else {
+		rc = EINVAL;
+		goto fail1;
+	}
+
+	/*
+	 * Wipe the atomic reboot status so subsequent MCDI requests succeed.
+	 * BOOT_STATUS is preserved so eno_nic_probe() can boot out of the
+	 * assertion handler.
+	 */
+	(void) siena_mcdi_poll_reboot(enp);
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, int, rc);
+
+	return (rc);
+}
+
+			void
+siena_mcdi_fini(
+	__in		efx_nic_t *enp)
+{
+}
+
+	__checkReturn	int
+siena_mcdi_fw_update_supported(
+	__in		efx_nic_t *enp,
+	__out		boolean_t *supportedp)
+{
+	EFSYS_ASSERT3U(enp->en_family, ==, EFX_FAMILY_SIENA);
+
+	*supportedp = B_TRUE;
+
+	return (0);
+}
+
+	__checkReturn	int
+siena_mcdi_macaddr_change_supported(
+	__in		efx_nic_t *enp,
+	__out		boolean_t *supportedp)
+{
+	EFSYS_ASSERT3U(enp->en_family, ==, EFX_FAMILY_SIENA);
+
+	*supportedp = B_TRUE;
+
+	return (0);
+}
+
+#endif	/* EFSYS_OPT_SIENA && EFSYS_OPT_MCDI */