+static __checkReturn efx_rc_t
+ef10_set_workaround_bug26807(
+ __in efx_nic_t *enp)
+{
+ efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
+ uint32_t flags;
+ efx_rc_t rc;
+
+ /*
+ * If the bug26807 workaround is enabled, then firmware has enabled
+ * support for chained multicast filters. Firmware will reset (FLR)
+ * functions which have filters in the hardware filter table when the
+ * workaround is enabled/disabled.
+ *
+ * We must recheck if the workaround is enabled after inserting the
+ * first hardware filter, in case it has been changed since this check.
+ */
+ rc = efx_mcdi_set_workaround(enp, MC_CMD_WORKAROUND_BUG26807,
+ B_TRUE, &flags);
+ if (rc == 0) {
+ encp->enc_bug26807_workaround = B_TRUE;
+ if (flags & (1 << MC_CMD_WORKAROUND_EXT_OUT_FLR_DONE_LBN)) {
+ /*
+ * Other functions had installed filters before the
+ * workaround was enabled, and they have been reset
+ * by firmware.
+ */
+ EFSYS_PROBE(bug26807_workaround_flr_done);
+ /* FIXME: bump MC warm boot count ? */
+ }
+ } else if (rc == EACCES) {
+ /*
+ * Unprivileged functions cannot enable the workaround in older
+ * firmware.
+ */
+ encp->enc_bug26807_workaround = B_FALSE;
+ } else if ((rc == ENOTSUP) || (rc == ENOENT)) {
+ encp->enc_bug26807_workaround = B_FALSE;
+ } else {
+ goto fail1;
+ }
+
+ return (0);
+
+fail1:
+ EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+ return (rc);
+}
+