On Mon, Dec 05, 2011 at 03:33:14PM +0000, Luigi Rizzo wrote:
> Author: luigi
> Date: Mon Dec 5 15:33:13 2011
> New Revision: 228281
> URL: http://svn.freebsd.org/changeset/base/228281
>
> Log:
> add netmap support for "em", "lem", "igb" and "re".
>
> On my hardware, "em" in netmap mode does about 1.388 Mpps
> on one card (on an Asus motherboard), and 1.1 Mpps on another
> card (PCIe bus). Both seem to be NIC-limited, because
> i have the same rate even with the CPU running at 150 MHz.
>
> On the "re" driver the tx throughput is around 420-450 Kpps
> on various (8111C and the like) chipsets. On the Rx side
> performance seems much better, and i can receive the full
> load generated by the "em" cards.
>
> "igb" is untested as i don't have the hardware.
>
<...>
> +#ifdef DEV_NETMAP
> + if (slot) {
> + int si = i + na->tx_rings[txr->me].nkr_hwofs;
> + void *addr;
> +
> + if (si >= na->num_tx_desc)
> + si -= na->num_tx_desc;
> + addr = NMB(slot + si);
> + txr->tx_base[i].buffer_addr =
> + htole64(vtophys(addr));
> + /* reload the map for netmap mode */
> + netmap_load_map(txr->txtag,
> + txbuf->map, addr, na->buff_size);
> + }
> +#endif /* DEV_NETMAP */
Can these vtophys(9) usages be fixed to use bus_dma(9) instead so netmap
works with bounce buffers, IOMMUs etc?
Marius
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