hyperv/hn: Save capabilities for later use.

[sepherosa_gmail.com]

Summary

And don't allow capability changes during reinitialization, which
breaks too much static configuration.

head/sys/dev/hyperv/netvsc/hv_net_vsc.h

struct hn_softc {
 
         int             hn_cpu;
         struct taskqueue *hn_tx_taskq;
         struct sysctl_oid *hn_tx_sysctl_tree;
         struct sysctl_oid *hn_rx_sysctl_tree;
         struct vmbus_xact_ctx *hn_xact;
         uint32_t        hn_nvs_ver;
 
-        uint32_t                hn_flags;
+        uint32_t                hn_caps;        /* HN_CAP_ */
+        uint32_t                hn_flags;       /* HN_FLAG_ */
         void                    *hn_rxbuf;
         uint32_t                hn_rxbuf_gpadl;
         struct hyperv_dma       hn_rxbuf_dma;
 
         uint32_t                hn_chim_gpadl;
         struct hyperv_dma       hn_chim_dma;
 
         uint32_t                hn_rndis_rid;
         uint32_t                hn_ndis_ver;
 
         struct ndis_rssprm_toeplitz hn_rss;
 };
 
 #define HN_FLAG_RXBUF_CONNECTED         0x0001
 #define HN_FLAG_CHIM_CONNECTED          0x0002
+
+#define HN_CAP_VLAN                     0x0001
+#define HN_CAP_MTU                      0x0002
+#define HN_CAP_IPCS                     0x0004
+#define HN_CAP_TCP4CS                   0x0008
+#define HN_CAP_TCP6CS                   0x0010
+#define HN_CAP_UDP4CS                   0x0020
+#define HN_CAP_UDP6CS                   0x0040
+#define HN_CAP_TSO4                     0x0080
+#define HN_CAP_TSO6                     0x0100
 
 /*
  * Externs
  */
 extern int hv_promisc_mode;
 struct hn_send_ctx;
 
 void netvsc_linkstatus_callback(struct hn_softc *sc, uint32_t status);
 int hn_nvs_attach(struct hn_softc *sc, int mtu);
 int hv_nv_on_device_remove(struct hn_softc *sc);
 int hv_nv_on_send(struct vmbus_channel *chan, uint32_t rndis_mtype,
         struct hn_send_ctx *sndc, struct vmbus_gpa *gpa, int gpa_cnt);
 
 #endif  /* __HV_NET_VSC_H__ */
 

head/sys/dev/hyperv/netvsc/hv_net_vsc.c

hn_nvs_conf_ndis(struct hn_softc *sc, int mtu)
 
         memset(&conf, 0, sizeof(conf));
         conf.nvs_type = HN_NVS_TYPE_NDIS_CONF;
         conf.nvs_mtu = mtu;
         conf.nvs_caps = HN_NVS_NDIS_CONF_VLAN;
 
         /* NOTE: No response. */
         error = hn_nvs_req_send(sc, &conf, sizeof(conf));
-        if (error)
+        if (error) {
                 if_printf(sc->hn_ifp, "send nvs ndis conf failed: %d\n", error);
                 return (error);
+        }
+
+        if (bootverbose)
+                if_printf(sc->hn_ifp, "nvs ndis conf done\n");
+        sc->hn_caps |= HN_CAP_MTU | HN_CAP_VLAN;
+        return (0);
 }
 
 static int
 hn_nvs_init_ndis(struct hn_softc *sc)
 {
         struct hn_nvs_ndis_init ndis;
         int error;