src/sys/dev/netmap/if_em_netmap.h, branch release/10.1.0

MFC 270063: update of netmap code

2014-08-20T23:34:36Z

(vtnet and cxgbe not merged yet because we need some other mfc first)

MFH: sync the netmap code with the one in HEAD

2014-02-18T05:01:04Z

(enhanced VALE switch, netmap pipes, emulated netmap mode). See details in the log for svn 261909.

remove trailing whitespace

2013-05-02T16:01:04Z

whitespace changes:

2013-04-29T18:00:53Z

remove $Id$ lines, and add blank lines around some #if / #elif /#endif

add some definition and driver changes in preparation for

2013-01-17T22:14:58Z

two upcoming features: semi-transparent mode: when a device is opened in this mode, the user program will be able to mark slots that must be forwarded to the "other" side (i.e. from NIC to host stack, or viceversa), and the forwarding will occur automatically at the next netmap syscall. This saves the need to open another file descriptor and do the forwarding manually. direct-forwarding mode: when operating with a VALE port, the user can specify in the slot the actual destination port, overriding the forwarding decision made by a lookup of the destination MAC. This can be useful to implement packet dispatchers. No API changes will be introduced. No new functionality in this patch yet.

fix some signed/unsigned warnings in the netmap code.

2012-08-02T11:59:43Z

Unfortunately the original drivers still have a lot of sign conversion/comparison warnings.

A bunch of netmap fixes:

2012-02-27T19:05:01Z

USERSPACE: 1. add support for devices with different number of rx and tx queues; 2. add better support for zero-copy operation, adding an extra field to the netmap ring to indicate how many buffers we have already processed but not yet released (with help from Eddie Kohler); 3. The two changes above unfortunately require an API change, so while at it add a version field and some spares to the ioctl() argument to help detect mismatches. 4. update the manual page for the two changes above; 5. update sample applications in tools/tools/netmap KERNEL: 1. simplify the internal structures moving the global wait queues to the 'struct netmap_adapter'; 2. simplify the functions that map kring<->nic ring indexes 3. normalize device-specific code, helps mainteinance; 4. start exploring the impact of micro-optimizations (prefetch etc.) in the ixgbe driver. Use 'legacy' descriptors on the tx ring and prefetch slots gives about 20% speedup at 900 MHz. Another 7-10% would come from removing the explict calls to bus_dmamap* in the core (they are effectively NOPs in this case, but it takes expensive load of the per-buffer dma maps to figure out that they are all NULL. Rx performance not investigated. I am postponing the MFC so i can import a few more improvements before merging.

Various cleanups for readability (no functional changes)

2012-02-17T14:09:04Z

- remove the KEVENT code, which was incomplete and not compiled anyways; - change some while() loops into for() - adjust indentation - remove extra whitespace MFC after: 1 week

(This commit only touches code within the DEV_NETMAP blocks)

2012-02-15T23:13:29Z

Introduce some functions to map NIC ring indexes into netmap ring indexes and vice versa. This way we can implement the bound checks only in one place (and hopefully in a correct way). On passing, make the code and comments more uniform across the various drivers.

reduce the differences between these three files.

2012-02-15T18:59:26Z

The three drivers (em, lem and igb) are extremely similar, too bad that the structures use different names and we cannot share the code.