src/sys/net/netmap_user.h, branch release/10.1.0

Update a couple of header files that were missed in r270252. This is a

2014-08-21T19:42:03Z

direct commit to stable/10. Submitted by: luigi

MFC 267168:

2014-06-09T15:16:17Z

misc bugfixes: - stdio.h is needed for fprint() - make memsize uint32_t to avoid errors due to overflow - honor the *XPOLL flagg in NIOCREGIF requests - mmap fails wit MAP_FAILED, not NULL.

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.

clarify usage of NETMAP_BUF

2013-05-30T13:41:19Z

remove $Id$ (whitespace change)

2013-04-30T16:00:21Z

Cast through void * to silence compiler warning

2012-10-03T21:41:20Z

The base netmap pointer and offsets involved are provided by the kernel side of the netmap interface and will have appropriate alignment. Sponsored by: ADARA Networks MFC After: 2 weeks

A bit of cleanup in the names of fields of netmap-related structures.

2012-04-13T16:03:07Z

Use the name 'ring' instead of 'queue' in all fields. Bump NETMAP_API.

- remove an extra parenthesis in a closing brace;

2012-03-11T17:35:12Z

- add the macro NETMAP_RING_FIRST_RESERVED() which returns the index of the first non-released buffer in the ring (this is useful for code that retains buffers for some time instead of processing them immediately)

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.

- change the buffer size from a constant to a

2012-02-08T11:43:29Z

TUNABLE variable (hw.netmap.buf_size) so we can experiment with values different from 2048 which may give better cache performance. - rearrange the memory allocation code so it will be easier to replace it with a different implementation. The current code relies on a single large contiguous chunk of memory obtained through contigmalloc. The new implementation (not committed yet) uses multiple smaller chunks which are easier to fit in a fragmented address space.