git: 50cebb6a8596 - stable/12 - e1000: Restore VF interface random MAC

[Kevin Bowling]

The branch stable/12 has been updated by kbowling (ports committer):

URL: https://cgit.FreeBSD.org/src/commit/?id=50cebb6a8596eaccca5c6ea6f0fbc871d0197ef3

commit 50cebb6a8596eaccca5c6ea6f0fbc871d0197ef3
Author:     Kevin Bowling <kbowling at FreeBSD.org>
AuthorDate: 2021-04-15 18:45:02 +0000
Commit:     Kevin Bowling <kbowling at FreeBSD.org>
CommitDate: 2021-04-29 01:23:07 +0000

    e1000: Restore VF interface random MAC
    
    Restore 525e07418c77 after the iflib conversion of igb(4). This
    reenables random MAC address generation when attaching to a VF with a
    zeroed MAC.
    
    PR:             253535
    Reported by:    Balaev PA <mail at void.so>
    Reviewed by:    markj
    MFC after:      2 weeks
    Differential Revision:  https://reviews.freebsd.org/D29785
    
    (cherry picked from commit 68a46f11eadab48a1da9e3d3900569a6a1ce142e)
---
 sys/dev/e1000/if_em.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c
index 8fc40586ad76..2d0f65b34144 100644
--- a/sys/dev/e1000/if_em.c
+++ b/sys/dev/e1000/if_em.c
@@ -1063,9 +1063,17 @@ em_if_attach_pre(if_ctx_t ctx)
 	}
 
 	if (!em_is_valid_ether_addr(hw->mac.addr)) {
-		device_printf(dev, "Invalid MAC address\n");
-		error = EIO;
-		goto err_late;
+		if (adapter->vf_ifp) {
+			u8 addr[ETHER_ADDR_LEN];
+			arc4rand(&addr, sizeof(addr), 0);
+			addr[0] &= 0xFE;
+			addr[0] |= 0x02;
+			bcopy(addr, hw->mac.addr, sizeof(addr));
+		} else {
+			device_printf(dev, "Invalid MAC address\n");
+			error = EIO;
+			goto err_late;
+		}
 	}
 
 	/* Disable ULP support */
@@ -1914,6 +1922,13 @@ em_identify_hardware(if_ctx_t ctx)
 		device_printf(dev, "Setup init failure\n");
 		return;
 	}
+
+	/* Are we a VF device? */
+	if ((adapter->hw.mac.type == e1000_vfadapt) ||
+	    (adapter->hw.mac.type == e1000_vfadapt_i350))
+		adapter->vf_ifp = 1;
+	else
+		adapter->vf_ifp = 0;
 }
 
 static int