![]() ![]() Na->rx_rings = na->tx_rings + na->num_tx_rings + 1 Na->tx_rings = (void *)((char *)buf + sizeof(*na)) * use volatile to fix a probable compiler error on 2.6.25 */ Size = sizeof(*na) + n * sizeof(struct netmap_kring) N = na->num_rx_rings + na->num_tx_rings + 2 * on each direction we have N+1 resources Netmap_attach(struct netmap_adapter *na, int num_queues) Int if_refcount // XXX additions for bridge Int (*nm_rxsync)(struct ifnet *, u_int ring, int lock) Int (*nm_txsync)(struct ifnet *, u_int ring, int lock) Void (*nm_lock)(struct ifnet *, int what, u_int ringid) Int (*nm_register)(struct ifnet *, int onoff) NM_LOCK_T core_lock /* used if no device lock available */ Struct ifnet *ifp /* adapter is ifp->if_softc */ * references to the ifnet and device routines, used by Int (*if_transmit)(struct ifnet *, struct mbuf *) * packets from the network stack when netmap is active. * copy of if_qflush and if_transmit pointers, to intercept NM_SELINFO_T tx_si, rx_si /* global wait queues */ Struct netmap_kring *rx_rings /* array of RX rings. Struct netmap_kring *tx_rings /* array of TX rings. * N+1 entries, for the adapter queues and for the host queue. * tx_rings and rx_rings are private but allocated U_int num_tx_desc /* number of descriptor in each queue */ U_int num_tx_rings /* number of adapter transmit rings */ U_int num_rx_rings /* number of adapter receive rings */ Int separate_locks /* set if the interface suports different Int na_multi /* threads attached to multiple hw queues */ Int na_single /* threads attached to a single hw queue */ * and especially avoid huge contention on the locks. * of each type we have so we can optimize the drivers, * The selwakeup in the interrupt thread can use per-ring Struct netmap_if objs in the mapped region. Interface, which is equal to the number of Int refcount /* number of user-space descriptors using this Uint32_t na_flags /* future place for IFCAP_NETMAP */ * value which we can use to detect that the interface is good. * always exists and is at least 32 bits) contains a magic * NA(ifp) points here, and the first entry (which hopefully * On linux we do not have a good way to tell if an interface Refer to NetMap Portal’s technical help and tutorial.* This struct extends the 'struct adapter' (or NetMap Portal watersheds only cover a select subgroup of all NetMap datasets, primarily using LiDAR developed after 2017. Searches can be made to identify locations where two attributes overlap, like the highest 1% of coho habitat quality and the highest 10% of erosion potential. Here users can pan, zoom in and out, and search for specific watershed attributes, like the best fish habitats, highest erosion potential, best riparian areas and widest floodplains, among other attributes. The NetMap Portal, a free online mapping application, was developed to ease access and use of virtual watershed information in the form of maps. Thus, many people may have difficult accessing and using the wealth of watershed information contained in NetMap datasets. Using ArcGIS requires adequate computer hardware, proprietary software and some experience. NetMap’s virtual watersheds work within an ArcGIS environment as a set of digital shapefiles, and contain information pertaining to river networks, channel environments, floodplains, riparian zones, erosion potential and roads. What is NetMap Portal? Online Watershed Maps ![]()
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