diff --git a/drivers/net/sfc/base/ef10_impl.h b/drivers/net/sfc/base/ef10_impl.h
index fae94fe839..0cfbf5953a 100644
--- a/drivers/net/sfc/base/ef10_impl.h
+++ b/drivers/net/sfc/base/ef10_impl.h
@@ -451,6 +451,12 @@ ef10_nvram_partn_size(
 	__in			uint32_t partn,
 	__out			size_t *sizep);
 
+extern	__checkReturn		efx_rc_t
+ef10_nvram_partn_info(
+	__in			efx_nic_t *enp,
+	__in			uint32_t partn,
+	__out			efx_nvram_info_t * enip);
+
 extern	__checkReturn		efx_rc_t
 ef10_nvram_partn_rw_start(
 	__in			efx_nic_t *enp,
diff --git a/drivers/net/sfc/base/ef10_nvram.c b/drivers/net/sfc/base/ef10_nvram.c
index 2aed421318..a618c75daf 100644
--- a/drivers/net/sfc/base/ef10_nvram.c
+++ b/drivers/net/sfc/base/ef10_nvram.c
@@ -1959,6 +1959,29 @@ ef10_nvram_partn_size(
 	return (rc);
 }
 
+	__checkReturn		efx_rc_t
+ef10_nvram_partn_info(
+	__in			efx_nic_t *enp,
+	__in			uint32_t partn,
+	__out			efx_nvram_info_t *enip)
+{
+	efx_rc_t rc;
+
+	if ((rc = efx_mcdi_nvram_info_ex(enp, partn, enip)) != 0)
+		goto fail1;
+
+	if (enip->eni_write_size == 0)
+		enip->eni_write_size = EF10_NVRAM_CHUNK;
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+
 	__checkReturn		efx_rc_t
 ef10_nvram_partn_lock(
 	__in			efx_nic_t *enp,
@@ -2439,22 +2462,17 @@ ef10_nvram_partn_rw_start(
 	__in			uint32_t partn,
 	__out			size_t *chunk_sizep)
 {
-	uint32_t write_size = 0;
+	efx_nvram_info_t eni = { 0 };
 	efx_rc_t rc;
 
-	if ((rc = efx_mcdi_nvram_info(enp, partn, NULL, NULL,
-	    NULL, &write_size)) != 0)
+	if ((rc = ef10_nvram_partn_info(enp, partn, &eni)) != 0)
 		goto fail1;
 
 	if ((rc = ef10_nvram_partn_lock(enp, partn)) != 0)
 		goto fail2;
 
-	if (chunk_sizep != NULL) {
-		if (write_size == 0)
-			*chunk_sizep = EF10_NVRAM_CHUNK;
-		else
-			*chunk_sizep = write_size;
-	}
+	if (chunk_sizep != NULL)
+		*chunk_sizep = eni.eni_write_size;
 
 	return (0);
 
diff --git a/drivers/net/sfc/base/efx.h b/drivers/net/sfc/base/efx.h
index a5342afea8..49059189b1 100644
--- a/drivers/net/sfc/base/efx.h
+++ b/drivers/net/sfc/base/efx.h
@@ -1634,6 +1634,12 @@ efx_nvram_size(
 	__in			efx_nvram_type_t type,
 	__out			size_t *sizep);
 
+extern	__checkReturn		efx_rc_t
+efx_nvram_info(
+	__in			efx_nic_t *enp,
+	__in			efx_nvram_type_t type,
+	__out			efx_nvram_info_t *enip);
+
 extern	__checkReturn		efx_rc_t
 efx_nvram_rw_start(
 	__in			efx_nic_t *enp,
diff --git a/drivers/net/sfc/base/efx_impl.h b/drivers/net/sfc/base/efx_impl.h
index 684403f237..577d5aaa05 100644
--- a/drivers/net/sfc/base/efx_impl.h
+++ b/drivers/net/sfc/base/efx_impl.h
@@ -501,7 +501,8 @@ typedef struct efx_nvram_ops_s {
 #endif	/* EFSYS_OPT_DIAG */
 	efx_rc_t	(*envo_type_to_partn)(efx_nic_t *, efx_nvram_type_t,
 					    uint32_t *);
-	efx_rc_t	(*envo_partn_size)(efx_nic_t *, uint32_t, size_t *);
+	efx_rc_t	(*envo_partn_info)(efx_nic_t *, uint32_t,
+					    efx_nvram_info_t *);
 	efx_rc_t	(*envo_partn_rw_start)(efx_nic_t *, uint32_t, size_t *);
 	efx_rc_t	(*envo_partn_read)(efx_nic_t *, uint32_t,
 					    unsigned int, caddr_t, size_t);
diff --git a/drivers/net/sfc/base/efx_nvram.c b/drivers/net/sfc/base/efx_nvram.c
index df7e851b20..b817cb688b 100644
--- a/drivers/net/sfc/base/efx_nvram.c
+++ b/drivers/net/sfc/base/efx_nvram.c
@@ -16,7 +16,7 @@ static const efx_nvram_ops_t	__efx_nvram_siena_ops = {
 	siena_nvram_test,		/* envo_test */
 #endif	/* EFSYS_OPT_DIAG */
 	siena_nvram_type_to_partn,	/* envo_type_to_partn */
-	siena_nvram_partn_size,		/* envo_partn_size */
+	siena_nvram_partn_info,		/* envo_partn_info */
 	siena_nvram_partn_rw_start,	/* envo_partn_rw_start */
 	siena_nvram_partn_read,		/* envo_partn_read */
 	siena_nvram_partn_read,		/* envo_partn_read_backup */
@@ -37,7 +37,7 @@ static const efx_nvram_ops_t	__efx_nvram_ef10_ops = {
 	ef10_nvram_test,		/* envo_test */
 #endif	/* EFSYS_OPT_DIAG */
 	ef10_nvram_type_to_partn,	/* envo_type_to_partn */
-	ef10_nvram_partn_size,		/* envo_partn_size */
+	ef10_nvram_partn_info,		/* envo_partn_info */
 	ef10_nvram_partn_rw_start,	/* envo_partn_rw_start */
 	ef10_nvram_partn_read,		/* envo_partn_read */
 	ef10_nvram_partn_read_backup,	/* envo_partn_read_backup */
@@ -138,6 +138,7 @@ efx_nvram_size(
 	__out			size_t *sizep)
 {
 	const efx_nvram_ops_t *envop = enp->en_envop;
+	efx_nvram_info_t eni = { 0 };
 	uint32_t partn;
 	efx_rc_t rc;
 
@@ -147,9 +148,11 @@ efx_nvram_size(
 	if ((rc = envop->envo_type_to_partn(enp, type, &partn)) != 0)
 		goto fail1;
 
-	if ((rc = envop->envo_partn_size(enp, partn, sizep)) != 0)
+	if ((rc = envop->envo_partn_info(enp, partn, &eni)) != 0)
 		goto fail2;
 
+	*sizep = eni.eni_partn_size;
+
 	return (0);
 
 fail2:
@@ -161,6 +164,36 @@ efx_nvram_size(
 	return (rc);
 }
 
+extern	__checkReturn		efx_rc_t
+efx_nvram_info(
+	__in			efx_nic_t *enp,
+	__in			efx_nvram_type_t type,
+	__out			efx_nvram_info_t *enip)
+{
+	const efx_nvram_ops_t *envop = enp->en_envop;
+	uint32_t partn;
+	efx_rc_t rc;
+
+	EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
+	EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_NVRAM);
+
+	if ((rc = envop->envo_type_to_partn(enp, type, &partn)) != 0)
+		goto fail1;
+
+	if ((rc = envop->envo_partn_info(enp, partn, enip)) != 0)
+		goto fail2;
+
+	return (0);
+
+fail2:
+	EFSYS_PROBE(fail2);
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+
 	__checkReturn		efx_rc_t
 efx_nvram_get_version(
 	__in			efx_nic_t *enp,
@@ -305,7 +338,7 @@ efx_nvram_erase(
 {
 	const efx_nvram_ops_t *envop = enp->en_envop;
 	unsigned int offset = 0;
-	size_t size = 0;
+	efx_nvram_info_t eni = { 0 };
 	uint32_t partn;
 	efx_rc_t rc;
 
@@ -317,10 +350,11 @@ efx_nvram_erase(
 
 	EFSYS_ASSERT3U(enp->en_nvram_partn_locked, ==, partn);
 
-	if ((rc = envop->envo_partn_size(enp, partn, &size)) != 0)
+	if ((rc = envop->envo_partn_info(enp, partn, &eni)) != 0)
 		goto fail2;
 
-	if ((rc = envop->envo_partn_erase(enp, partn, offset, size)) != 0)
+	if ((rc = envop->envo_partn_erase(enp, partn, offset,
+		    eni.eni_partn_size)) != 0)
 		goto fail3;
 
 	return (0);
diff --git a/drivers/net/sfc/base/siena_impl.h b/drivers/net/sfc/base/siena_impl.h
index 1adb8a437e..38d0289cbe 100644
--- a/drivers/net/sfc/base/siena_impl.h
+++ b/drivers/net/sfc/base/siena_impl.h
@@ -191,6 +191,12 @@ siena_nvram_partn_size(
 	__in			uint32_t partn,
 	__out			size_t *sizep);
 
+extern	__checkReturn		efx_rc_t
+siena_nvram_partn_info(
+	__in			efx_nic_t *enp,
+	__in			uint32_t partn,
+	__out			efx_nvram_info_t * enip);
+
 extern	__checkReturn		efx_rc_t
 siena_nvram_partn_rw_start(
 	__in			efx_nic_t *enp,
diff --git a/drivers/net/sfc/base/siena_nvram.c b/drivers/net/sfc/base/siena_nvram.c
index b8ea8a757f..7d423d226b 100644
--- a/drivers/net/sfc/base/siena_nvram.c
+++ b/drivers/net/sfc/base/siena_nvram.c
@@ -39,6 +39,29 @@ siena_nvram_partn_size(
 	return (rc);
 }
 
+	__checkReturn		efx_rc_t
+siena_nvram_partn_info(
+	__in			efx_nic_t *enp,
+	__in			uint32_t partn,
+	__out			efx_nvram_info_t * enip)
+{
+	efx_rc_t rc;
+
+	if ((rc = efx_mcdi_nvram_info_ex(enp, partn, enip)) != 0)
+		goto fail1;
+
+	if (enip->eni_write_size == 0)
+		enip->eni_write_size = SIENA_NVRAM_CHUNK;
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+
 	__checkReturn		efx_rc_t
 siena_nvram_partn_lock(
 	__in			efx_nic_t *enp,