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diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c
--- a/sys/dev/e1000/if_em.c
+++ b/sys/dev/e1000/if_em.c
@@ -330,6 +330,7 @@
static void em_print_debug_info(struct e1000_softc *);
static int em_is_valid_ether_addr(u8 *);
static bool em_automask_tso(if_ctx_t);
+static int em_sysctl_tso_tcp_flags_mask(SYSCTL_HANDLER_ARGS);
static int em_sysctl_int_delay(SYSCTL_HANDLER_ARGS);
static void em_add_int_delay_sysctl(struct e1000_softc *, const char *,
const char *, struct em_int_delay_info *, int, int);
@@ -855,6 +856,24 @@
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, sc, 0,
em_get_rs, "I", "Dump RS indexes");
+ SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO,
+ "tso_tcp_flags_mask_first_segment",
+ CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
+ sc, 0, em_sysctl_tso_tcp_flags_mask, "IU",
+ "TSO TCP flags mask for first segment");
+
+ SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO,
+ "tso_tcp_flags_mask_middle_segment",
+ CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
+ sc, 1, em_sysctl_tso_tcp_flags_mask, "IU",
+ "TSO TCP flags mask for middle segment");
+
+ SYSCTL_ADD_PROC(ctx_list, child, OID_AUTO,
+ "tso_tcp_flags_mask_last_segment",
+ CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
+ sc, 2, em_sysctl_tso_tcp_flags_mask, "IU",
+ "TSO TCP flags mask for last segment");
+
scctx->isc_tx_nsegments = EM_MAX_SCATTER;
scctx->isc_nrxqsets_max = scctx->isc_ntxqsets_max = em_set_num_queues(ctx);
if (bootverbose)
@@ -4896,6 +4915,43 @@
return (0);
}
+static int
+em_sysctl_tso_tcp_flags_mask(SYSCTL_HANDLER_ARGS)
+{
+ struct e1000_softc *sc;
+ u32 reg, val, shift;
+ int error, mask;
+
+ sc = oidp->oid_arg1;
+ switch (oidp->oid_arg2) {
+ case 0:
+ reg = E1000_DTXTCPFLGL;
+ shift = 0;
+ break;
+ case 1:
+ reg = E1000_DTXTCPFLGL;
+ shift = 16;
+ break;
+ case 2:
+ reg = E1000_DTXTCPFLGH;
+ shift = 0;
+ break;
+ default:
+ return (EINVAL);
+ break;
+ }
+ val = E1000_READ_REG(&sc->hw, reg);
+ mask = (val >> shift) & 0xfff;
+ error = sysctl_handle_int(oidp, &mask, 0, req);
+ if (error != 0 || req->newptr == NULL)
+ return (error);
+ if (mask < 0 || mask > 0xfff)
+ return (EINVAL);
+ val = (val & ~(0xfff << shift)) | (mask << shift);
+ E1000_WRITE_REG(&sc->hw, reg, val);
+ return (0);
+}
+
static void
em_add_int_delay_sysctl(struct e1000_softc *sc, const char *name,
const char *description, struct em_int_delay_info *info,

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