a2a7409151
fix build on 32 bit platforms simplify logic in netmap_virt.h The commands (in net/netmap.h) to configure communication with the hypervisor may be revised soon. At the moment they are unused so this will not be a change of API.
673 lines
24 KiB
C
673 lines
24 KiB
C
/*
|
|
* Copyright (C) 2011-2014 Matteo Landi, Luigi Rizzo. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``S IS''AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* $FreeBSD$
|
|
*
|
|
* Definitions of constants and the structures used by the netmap
|
|
* framework, for the part visible to both kernel and userspace.
|
|
* Detailed info on netmap is available with "man netmap" or at
|
|
*
|
|
* http://info.iet.unipi.it/~luigi/netmap/
|
|
*
|
|
* This API is also used to communicate with the VALE software switch
|
|
*/
|
|
|
|
#ifndef _NET_NETMAP_H_
|
|
#define _NET_NETMAP_H_
|
|
|
|
#define NETMAP_API 11 /* current API version */
|
|
|
|
#define NETMAP_MIN_API 11 /* min and max versions accepted */
|
|
#define NETMAP_MAX_API 15
|
|
/*
|
|
* Some fields should be cache-aligned to reduce contention.
|
|
* The alignment is architecture and OS dependent, but rather than
|
|
* digging into OS headers to find the exact value we use an estimate
|
|
* that should cover most architectures.
|
|
*/
|
|
#define NM_CACHE_ALIGN 128
|
|
|
|
/*
|
|
* --- Netmap data structures ---
|
|
*
|
|
* The userspace data structures used by netmap are shown below.
|
|
* They are allocated by the kernel and mmap()ed by userspace threads.
|
|
* Pointers are implemented as memory offsets or indexes,
|
|
* so that they can be easily dereferenced in kernel and userspace.
|
|
|
|
KERNEL (opaque, obviously)
|
|
|
|
====================================================================
|
|
|
|
|
USERSPACE | struct netmap_ring
|
|
+---->+---------------+
|
|
/ | head,cur,tail |
|
|
struct netmap_if (nifp, 1 per fd) / | buf_ofs |
|
|
+---------------+ / | other fields |
|
|
| ni_tx_rings | / +===============+
|
|
| ni_rx_rings | / | buf_idx, len | slot[0]
|
|
| | / | flags, ptr |
|
|
| | / +---------------+
|
|
+===============+ / | buf_idx, len | slot[1]
|
|
| txring_ofs[0] | (rel.to nifp)--' | flags, ptr |
|
|
| txring_ofs[1] | +---------------+
|
|
(tx+1 entries) (num_slots entries)
|
|
| txring_ofs[t] | | buf_idx, len | slot[n-1]
|
|
+---------------+ | flags, ptr |
|
|
| rxring_ofs[0] | +---------------+
|
|
| rxring_ofs[1] |
|
|
(rx+1 entries)
|
|
| rxring_ofs[r] |
|
|
+---------------+
|
|
|
|
* For each "interface" (NIC, host stack, PIPE, VALE switch port) bound to
|
|
* a file descriptor, the mmap()ed region contains a (logically readonly)
|
|
* struct netmap_if pointing to struct netmap_ring's.
|
|
*
|
|
* There is one netmap_ring per physical NIC ring, plus one tx/rx ring
|
|
* pair attached to the host stack (this pair is unused for non-NIC ports).
|
|
*
|
|
* All physical/host stack ports share the same memory region,
|
|
* so that zero-copy can be implemented between them.
|
|
* VALE switch ports instead have separate memory regions.
|
|
*
|
|
* The netmap_ring is the userspace-visible replica of the NIC ring.
|
|
* Each slot has the index of a buffer (MTU-sized and residing in the
|
|
* mmapped region), its length and some flags. An extra 64-bit pointer
|
|
* is provided for user-supplied buffers in the tx path.
|
|
*
|
|
* In user space, the buffer address is computed as
|
|
* (char *)ring + buf_ofs + index * NETMAP_BUF_SIZE
|
|
*
|
|
* Added in NETMAP_API 11:
|
|
*
|
|
* + NIOCREGIF can request the allocation of extra spare buffers from
|
|
* the same memory pool. The desired number of buffers must be in
|
|
* nr_arg3. The ioctl may return fewer buffers, depending on memory
|
|
* availability. nr_arg3 will return the actual value, and, once
|
|
* mapped, nifp->ni_bufs_head will be the index of the first buffer.
|
|
*
|
|
* The buffers are linked to each other using the first uint32_t
|
|
* as the index. On close, ni_bufs_head must point to the list of
|
|
* buffers to be released.
|
|
*
|
|
* + NIOCREGIF can request space for extra rings (and buffers)
|
|
* allocated in the same memory space. The number of extra rings
|
|
* is in nr_arg1, and is advisory. This is a no-op on NICs where
|
|
* the size of the memory space is fixed.
|
|
*
|
|
* + NIOCREGIF can attach to PIPE rings sharing the same memory
|
|
* space with a parent device. The ifname indicates the parent device,
|
|
* which must already exist. Flags in nr_flags indicate if we want to
|
|
* bind the master or slave side, the index (from nr_ringid)
|
|
* is just a cookie and does not need to be sequential.
|
|
*
|
|
* + NIOCREGIF can also attach to 'monitor' rings that replicate
|
|
* the content of specific rings, also from the same memory space.
|
|
*
|
|
* Extra flags in nr_flags support the above functions.
|
|
* Application libraries may use the following naming scheme:
|
|
* netmap:foo all NIC ring pairs
|
|
* netmap:foo^ only host ring pair
|
|
* netmap:foo+ all NIC ring + host ring pairs
|
|
* netmap:foo-k the k-th NIC ring pair
|
|
* netmap:foo{k PIPE ring pair k, master side
|
|
* netmap:foo}k PIPE ring pair k, slave side
|
|
*
|
|
* Some notes about host rings:
|
|
*
|
|
* + The RX host ring is used to store those packets that the host network
|
|
* stack is trying to transmit through a NIC queue, but only if that queue
|
|
* is currently in netmap mode. Netmap will not intercept host stack mbufs
|
|
* designated to NIC queues that are not in netmap mode. As a consequence,
|
|
* registering a netmap port with netmap:foo^ is not enough to intercept
|
|
* mbufs in the RX host ring; the netmap port should be registered with
|
|
* netmap:foo*, or another registration should be done to open at least a
|
|
* NIC TX queue in netmap mode.
|
|
*
|
|
* + Netmap is not currently able to deal with intercepted trasmit mbufs which
|
|
* require offloadings like TSO, UFO, checksumming offloadings, etc. It is
|
|
* responsibility of the user to disable those offloadings (e.g. using
|
|
* ifconfig on FreeBSD or ethtool -K on Linux) for an interface that is being
|
|
* used in netmap mode. If the offloadings are not disabled, GSO and/or
|
|
* unchecksummed packets may be dropped immediately or end up in the host RX
|
|
* ring, and will be dropped as soon as the packet reaches another netmap
|
|
* adapter.
|
|
*/
|
|
|
|
/*
|
|
* struct netmap_slot is a buffer descriptor
|
|
*/
|
|
struct netmap_slot {
|
|
uint32_t buf_idx; /* buffer index */
|
|
uint16_t len; /* length for this slot */
|
|
uint16_t flags; /* buf changed, etc. */
|
|
uint64_t ptr; /* pointer for indirect buffers */
|
|
};
|
|
|
|
/*
|
|
* The following flags control how the slot is used
|
|
*/
|
|
|
|
#define NS_BUF_CHANGED 0x0001 /* buf_idx changed */
|
|
/*
|
|
* must be set whenever buf_idx is changed (as it might be
|
|
* necessary to recompute the physical address and mapping)
|
|
*
|
|
* It is also set by the kernel whenever the buf_idx is
|
|
* changed internally (e.g., by pipes). Applications may
|
|
* use this information to know when they can reuse the
|
|
* contents of previously prepared buffers.
|
|
*/
|
|
|
|
#define NS_REPORT 0x0002 /* ask the hardware to report results */
|
|
/*
|
|
* Request notification when slot is used by the hardware.
|
|
* Normally transmit completions are handled lazily and
|
|
* may be unreported. This flag lets us know when a slot
|
|
* has been sent (e.g. to terminate the sender).
|
|
*/
|
|
|
|
#define NS_FORWARD 0x0004 /* pass packet 'forward' */
|
|
/*
|
|
* (Only for physical ports, rx rings with NR_FORWARD set).
|
|
* Slot released to the kernel (i.e. before ring->head) with
|
|
* this flag set are passed to the peer ring (host/NIC),
|
|
* thus restoring the host-NIC connection for these slots.
|
|
* This supports efficient traffic monitoring or firewalling.
|
|
*/
|
|
|
|
#define NS_NO_LEARN 0x0008 /* disable bridge learning */
|
|
/*
|
|
* On a VALE switch, do not 'learn' the source port for
|
|
* this buffer.
|
|
*/
|
|
|
|
#define NS_INDIRECT 0x0010 /* userspace buffer */
|
|
/*
|
|
* (VALE tx rings only) data is in a userspace buffer,
|
|
* whose address is in the 'ptr' field in the slot.
|
|
*/
|
|
|
|
#define NS_MOREFRAG 0x0020 /* packet has more fragments */
|
|
/*
|
|
* (VALE ports only)
|
|
* Set on all but the last slot of a multi-segment packet.
|
|
* The 'len' field refers to the individual fragment.
|
|
*/
|
|
|
|
#define NS_PORT_SHIFT 8
|
|
#define NS_PORT_MASK (0xff << NS_PORT_SHIFT)
|
|
/*
|
|
* The high 8 bits of the flag, if not zero, indicate the
|
|
* destination port for the VALE switch, overriding
|
|
* the lookup table.
|
|
*/
|
|
|
|
#define NS_RFRAGS(_slot) ( ((_slot)->flags >> 8) & 0xff)
|
|
/*
|
|
* (VALE rx rings only) the high 8 bits
|
|
* are the number of fragments.
|
|
*/
|
|
|
|
|
|
/*
|
|
* struct netmap_ring
|
|
*
|
|
* Netmap representation of a TX or RX ring (also known as "queue").
|
|
* This is a queue implemented as a fixed-size circular array.
|
|
* At the software level the important fields are: head, cur, tail.
|
|
*
|
|
* In TX rings:
|
|
*
|
|
* head first slot available for transmission.
|
|
* cur wakeup point. select() and poll() will unblock
|
|
* when 'tail' moves past 'cur'
|
|
* tail (readonly) first slot reserved to the kernel
|
|
*
|
|
* [head .. tail-1] can be used for new packets to send;
|
|
* 'head' and 'cur' must be incremented as slots are filled
|
|
* with new packets to be sent;
|
|
* 'cur' can be moved further ahead if we need more space
|
|
* for new transmissions. XXX todo (2014-03-12)
|
|
*
|
|
* In RX rings:
|
|
*
|
|
* head first valid received packet
|
|
* cur wakeup point. select() and poll() will unblock
|
|
* when 'tail' moves past 'cur'
|
|
* tail (readonly) first slot reserved to the kernel
|
|
*
|
|
* [head .. tail-1] contain received packets;
|
|
* 'head' and 'cur' must be incremented as slots are consumed
|
|
* and can be returned to the kernel;
|
|
* 'cur' can be moved further ahead if we want to wait for
|
|
* new packets without returning the previous ones.
|
|
*
|
|
* DATA OWNERSHIP/LOCKING:
|
|
* The netmap_ring, and all slots and buffers in the range
|
|
* [head .. tail-1] are owned by the user program;
|
|
* the kernel only accesses them during a netmap system call
|
|
* and in the user thread context.
|
|
*
|
|
* Other slots and buffers are reserved for use by the kernel
|
|
*/
|
|
struct netmap_ring {
|
|
/*
|
|
* buf_ofs is meant to be used through macros.
|
|
* It contains the offset of the buffer region from this
|
|
* descriptor.
|
|
*/
|
|
const int64_t buf_ofs;
|
|
const uint32_t num_slots; /* number of slots in the ring. */
|
|
const uint32_t nr_buf_size;
|
|
const uint16_t ringid;
|
|
const uint16_t dir; /* 0: tx, 1: rx */
|
|
|
|
uint32_t head; /* (u) first user slot */
|
|
uint32_t cur; /* (u) wakeup point */
|
|
uint32_t tail; /* (k) first kernel slot */
|
|
|
|
uint32_t flags;
|
|
|
|
struct timeval ts; /* (k) time of last *sync() */
|
|
|
|
/* opaque room for a mutex or similar object */
|
|
#if !defined(_WIN32) || defined(__CYGWIN__)
|
|
uint8_t __attribute__((__aligned__(NM_CACHE_ALIGN))) sem[128];
|
|
#else
|
|
uint8_t __declspec(align(NM_CACHE_ALIGN)) sem[128];
|
|
#endif
|
|
|
|
/* the slots follow. This struct has variable size */
|
|
struct netmap_slot slot[0]; /* array of slots. */
|
|
};
|
|
|
|
|
|
/*
|
|
* RING FLAGS
|
|
*/
|
|
#define NR_TIMESTAMP 0x0002 /* set timestamp on *sync() */
|
|
/*
|
|
* updates the 'ts' field on each netmap syscall. This saves
|
|
* saves a separate gettimeofday(), and is not much worse than
|
|
* software timestamps generated in the interrupt handler.
|
|
*/
|
|
|
|
#define NR_FORWARD 0x0004 /* enable NS_FORWARD for ring */
|
|
/*
|
|
* Enables the NS_FORWARD slot flag for the ring.
|
|
*/
|
|
|
|
|
|
/*
|
|
* Netmap representation of an interface and its queue(s).
|
|
* This is initialized by the kernel when binding a file
|
|
* descriptor to a port, and should be considered as readonly
|
|
* by user programs. The kernel never uses it.
|
|
*
|
|
* There is one netmap_if for each file descriptor on which we want
|
|
* to select/poll.
|
|
* select/poll operates on one or all pairs depending on the value of
|
|
* nmr_queueid passed on the ioctl.
|
|
*/
|
|
struct netmap_if {
|
|
char ni_name[IFNAMSIZ]; /* name of the interface. */
|
|
const uint32_t ni_version; /* API version, currently unused */
|
|
const uint32_t ni_flags; /* properties */
|
|
#define NI_PRIV_MEM 0x1 /* private memory region */
|
|
|
|
/*
|
|
* The number of packet rings available in netmap mode.
|
|
* Physical NICs can have different numbers of tx and rx rings.
|
|
* Physical NICs also have a 'host' ring pair.
|
|
* Additionally, clients can request additional ring pairs to
|
|
* be used for internal communication.
|
|
*/
|
|
const uint32_t ni_tx_rings; /* number of HW tx rings */
|
|
const uint32_t ni_rx_rings; /* number of HW rx rings */
|
|
|
|
uint32_t ni_bufs_head; /* head index for extra bufs */
|
|
uint32_t ni_spare1[5];
|
|
/*
|
|
* The following array contains the offset of each netmap ring
|
|
* from this structure, in the following order:
|
|
* NIC tx rings (ni_tx_rings); host tx ring (1); extra tx rings;
|
|
* NIC rx rings (ni_rx_rings); host tx ring (1); extra rx rings.
|
|
*
|
|
* The area is filled up by the kernel on NIOCREGIF,
|
|
* and then only read by userspace code.
|
|
*/
|
|
const ssize_t ring_ofs[0];
|
|
};
|
|
|
|
|
|
#ifndef NIOCREGIF
|
|
/*
|
|
* ioctl names and related fields
|
|
*
|
|
* NIOCTXSYNC, NIOCRXSYNC synchronize tx or rx queues,
|
|
* whose identity is set in NIOCREGIF through nr_ringid.
|
|
* These are non blocking and take no argument.
|
|
*
|
|
* NIOCGINFO takes a struct ifreq, the interface name is the input,
|
|
* the outputs are number of queues and number of descriptor
|
|
* for each queue (useful to set number of threads etc.).
|
|
* The info returned is only advisory and may change before
|
|
* the interface is bound to a file descriptor.
|
|
*
|
|
* NIOCREGIF takes an interface name within a struct nmre,
|
|
* and activates netmap mode on the interface (if possible).
|
|
*
|
|
* The argument to NIOCGINFO/NIOCREGIF overlays struct ifreq so we
|
|
* can pass it down to other NIC-related ioctls.
|
|
*
|
|
* The actual argument (struct nmreq) has a number of options to request
|
|
* different functions.
|
|
* The following are used in NIOCREGIF when nr_cmd == 0:
|
|
*
|
|
* nr_name (in)
|
|
* The name of the port (em0, valeXXX:YYY, etc.)
|
|
* limited to IFNAMSIZ for backward compatibility.
|
|
*
|
|
* nr_version (in/out)
|
|
* Must match NETMAP_API as used in the kernel, error otherwise.
|
|
* Always returns the desired value on output.
|
|
*
|
|
* nr_tx_slots, nr_tx_slots, nr_tx_rings, nr_rx_rings (in/out)
|
|
* On input, non-zero values may be used to reconfigure the port
|
|
* according to the requested values, but this is not guaranteed.
|
|
* On output the actual values in use are reported.
|
|
*
|
|
* nr_ringid (in)
|
|
* Indicates how rings should be bound to the file descriptors.
|
|
* If nr_flags != 0, then the low bits (in NETMAP_RING_MASK)
|
|
* are used to indicate the ring number, and nr_flags specifies
|
|
* the actual rings to bind. NETMAP_NO_TX_POLL is unaffected.
|
|
*
|
|
* NOTE: THE FOLLOWING (nr_flags == 0) IS DEPRECATED:
|
|
* If nr_flags == 0, NETMAP_HW_RING and NETMAP_SW_RING control
|
|
* the binding as follows:
|
|
* 0 (default) binds all physical rings
|
|
* NETMAP_HW_RING | ring number binds a single ring pair
|
|
* NETMAP_SW_RING binds only the host tx/rx rings
|
|
*
|
|
* NETMAP_NO_TX_POLL can be OR-ed to make select()/poll() push
|
|
* packets on tx rings only if POLLOUT is set.
|
|
* The default is to push any pending packet.
|
|
*
|
|
* NETMAP_DO_RX_POLL can be OR-ed to make select()/poll() release
|
|
* packets on rx rings also when POLLIN is NOT set.
|
|
* The default is to touch the rx ring only with POLLIN.
|
|
* Note that this is the opposite of TX because it
|
|
* reflects the common usage.
|
|
*
|
|
* NOTE: NETMAP_PRIV_MEM IS DEPRECATED, use nr_arg2 instead.
|
|
* NETMAP_PRIV_MEM is set on return for ports that do not use
|
|
* the global memory allocator.
|
|
* This information is not significant and applications
|
|
* should look at the region id in nr_arg2
|
|
*
|
|
* nr_flags is the recommended mode to indicate which rings should
|
|
* be bound to a file descriptor. Values are NR_REG_*
|
|
*
|
|
* nr_arg1 (in) The number of extra rings to be reserved.
|
|
* Especially when allocating a VALE port the system only
|
|
* allocates the amount of memory needed for the port.
|
|
* If more shared memory rings are desired (e.g. for pipes),
|
|
* the first invocation for the same basename/allocator
|
|
* should specify a suitable number. Memory cannot be
|
|
* extended after the first allocation without closing
|
|
* all ports on the same region.
|
|
*
|
|
* nr_arg2 (in/out) The identity of the memory region used.
|
|
* On input, 0 means the system decides autonomously,
|
|
* other values may try to select a specific region.
|
|
* On return the actual value is reported.
|
|
* Region '1' is the global allocator, normally shared
|
|
* by all interfaces. Other values are private regions.
|
|
* If two ports the same region zero-copy is possible.
|
|
*
|
|
* nr_arg3 (in/out) number of extra buffers to be allocated.
|
|
*
|
|
*
|
|
*
|
|
* nr_cmd (in) if non-zero indicates a special command:
|
|
* NETMAP_BDG_ATTACH and nr_name = vale*:ifname
|
|
* attaches the NIC to the switch; nr_ringid specifies
|
|
* which rings to use. Used by vale-ctl -a ...
|
|
* nr_arg1 = NETMAP_BDG_HOST also attaches the host port
|
|
* as in vale-ctl -h ...
|
|
*
|
|
* NETMAP_BDG_DETACH and nr_name = vale*:ifname
|
|
* disconnects a previously attached NIC.
|
|
* Used by vale-ctl -d ...
|
|
*
|
|
* NETMAP_BDG_LIST
|
|
* list the configuration of VALE switches.
|
|
*
|
|
* NETMAP_BDG_VNET_HDR
|
|
* Set the virtio-net header length used by the client
|
|
* of a VALE switch port.
|
|
*
|
|
* NETMAP_BDG_NEWIF
|
|
* create a persistent VALE port with name nr_name.
|
|
* Used by vale-ctl -n ...
|
|
*
|
|
* NETMAP_BDG_DELIF
|
|
* delete a persistent VALE port. Used by vale-ctl -d ...
|
|
*
|
|
* nr_arg1, nr_arg2, nr_arg3 (in/out) command specific
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
|
|
|
|
/*
|
|
* struct nmreq overlays a struct ifreq (just the name)
|
|
*/
|
|
struct nmreq {
|
|
char nr_name[IFNAMSIZ];
|
|
uint32_t nr_version; /* API version */
|
|
uint32_t nr_offset; /* nifp offset in the shared region */
|
|
uint32_t nr_memsize; /* size of the shared region */
|
|
uint32_t nr_tx_slots; /* slots in tx rings */
|
|
uint32_t nr_rx_slots; /* slots in rx rings */
|
|
uint16_t nr_tx_rings; /* number of tx rings */
|
|
uint16_t nr_rx_rings; /* number of rx rings */
|
|
|
|
uint16_t nr_ringid; /* ring(s) we care about */
|
|
#define NETMAP_HW_RING 0x4000 /* single NIC ring pair */
|
|
#define NETMAP_SW_RING 0x2000 /* only host ring pair */
|
|
|
|
#define NETMAP_RING_MASK 0x0fff /* the ring number */
|
|
|
|
#define NETMAP_NO_TX_POLL 0x1000 /* no automatic txsync on poll */
|
|
|
|
#define NETMAP_DO_RX_POLL 0x8000 /* DO automatic rxsync on poll */
|
|
|
|
uint16_t nr_cmd;
|
|
#define NETMAP_BDG_ATTACH 1 /* attach the NIC */
|
|
#define NETMAP_BDG_DETACH 2 /* detach the NIC */
|
|
#define NETMAP_BDG_REGOPS 3 /* register bridge callbacks */
|
|
#define NETMAP_BDG_LIST 4 /* get bridge's info */
|
|
#define NETMAP_BDG_VNET_HDR 5 /* set the port virtio-net-hdr length */
|
|
#define NETMAP_BDG_OFFSET NETMAP_BDG_VNET_HDR /* deprecated alias */
|
|
#define NETMAP_BDG_NEWIF 6 /* create a virtual port */
|
|
#define NETMAP_BDG_DELIF 7 /* destroy a virtual port */
|
|
#define NETMAP_PT_HOST_CREATE 8 /* create ptnetmap kthreads */
|
|
#define NETMAP_PT_HOST_DELETE 9 /* delete ptnetmap kthreads */
|
|
#define NETMAP_BDG_POLLING_ON 10 /* delete polling kthread */
|
|
#define NETMAP_BDG_POLLING_OFF 11 /* delete polling kthread */
|
|
#define NETMAP_VNET_HDR_GET 12 /* get the port virtio-net-hdr length */
|
|
uint16_t nr_arg1; /* reserve extra rings in NIOCREGIF */
|
|
#define NETMAP_BDG_HOST 1 /* attach the host stack on ATTACH */
|
|
|
|
uint16_t nr_arg2;
|
|
uint32_t nr_arg3; /* req. extra buffers in NIOCREGIF */
|
|
uint32_t nr_flags;
|
|
/* various modes, extends nr_ringid */
|
|
uint32_t spare2[1];
|
|
};
|
|
|
|
#define NR_REG_MASK 0xf /* values for nr_flags */
|
|
enum { NR_REG_DEFAULT = 0, /* backward compat, should not be used. */
|
|
NR_REG_ALL_NIC = 1,
|
|
NR_REG_SW = 2,
|
|
NR_REG_NIC_SW = 3,
|
|
NR_REG_ONE_NIC = 4,
|
|
NR_REG_PIPE_MASTER = 5,
|
|
NR_REG_PIPE_SLAVE = 6,
|
|
};
|
|
/* monitor uses the NR_REG to select the rings to monitor */
|
|
#define NR_MONITOR_TX 0x100
|
|
#define NR_MONITOR_RX 0x200
|
|
#define NR_ZCOPY_MON 0x400
|
|
/* request exclusive access to the selected rings */
|
|
#define NR_EXCLUSIVE 0x800
|
|
/* request ptnetmap host support */
|
|
#define NR_PASSTHROUGH_HOST NR_PTNETMAP_HOST /* deprecated */
|
|
#define NR_PTNETMAP_HOST 0x1000
|
|
#define NR_RX_RINGS_ONLY 0x2000
|
|
#define NR_TX_RINGS_ONLY 0x4000
|
|
/* Applications set this flag if they are able to deal with virtio-net headers,
|
|
* that is send/receive frames that start with a virtio-net header.
|
|
* If not set, NIOCREGIF will fail with netmap ports that require applications
|
|
* to use those headers. If the flag is set, the application can use the
|
|
* NETMAP_VNET_HDR_GET command to figure out the header length. */
|
|
#define NR_ACCEPT_VNET_HDR 0x8000
|
|
|
|
#define NM_BDG_NAME "vale" /* prefix for bridge port name */
|
|
|
|
/*
|
|
* Windows does not have _IOWR(). _IO(), _IOW() and _IOR() are defined
|
|
* in ws2def.h but not sure if they are in the form we need.
|
|
* XXX so we redefine them
|
|
* in a convenient way to use for DeviceIoControl signatures
|
|
*/
|
|
#ifdef _WIN32
|
|
#undef _IO // ws2def.h
|
|
#define _WIN_NM_IOCTL_TYPE 40000
|
|
#define _IO(_c, _n) CTL_CODE(_WIN_NM_IOCTL_TYPE, ((_n) + 0x800) , \
|
|
METHOD_BUFFERED, FILE_ANY_ACCESS )
|
|
#define _IO_direct(_c, _n) CTL_CODE(_WIN_NM_IOCTL_TYPE, ((_n) + 0x800) , \
|
|
METHOD_OUT_DIRECT, FILE_ANY_ACCESS )
|
|
|
|
#define _IOWR(_c, _n, _s) _IO(_c, _n)
|
|
|
|
/* We havesome internal sysctl in addition to the externally visible ones */
|
|
#define NETMAP_MMAP _IO_direct('i', 160) // note METHOD_OUT_DIRECT
|
|
#define NETMAP_POLL _IO('i', 162)
|
|
|
|
/* and also two setsockopt for sysctl emulation */
|
|
#define NETMAP_SETSOCKOPT _IO('i', 140)
|
|
#define NETMAP_GETSOCKOPT _IO('i', 141)
|
|
|
|
|
|
//These linknames are for the Netmap Core Driver
|
|
#define NETMAP_NT_DEVICE_NAME L"\\Device\\NETMAP"
|
|
#define NETMAP_DOS_DEVICE_NAME L"\\DosDevices\\netmap"
|
|
|
|
//Definition of a structure used to pass a virtual address within an IOCTL
|
|
typedef struct _MEMORY_ENTRY {
|
|
PVOID pUsermodeVirtualAddress;
|
|
} MEMORY_ENTRY, *PMEMORY_ENTRY;
|
|
|
|
typedef struct _POLL_REQUEST_DATA {
|
|
int events;
|
|
int timeout;
|
|
int revents;
|
|
} POLL_REQUEST_DATA;
|
|
|
|
#endif /* _WIN32 */
|
|
|
|
/*
|
|
* FreeBSD uses the size value embedded in the _IOWR to determine
|
|
* how much to copy in/out. So we need it to match the actual
|
|
* data structure we pass. We put some spares in the structure
|
|
* to ease compatibility with other versions
|
|
*/
|
|
#define NIOCGINFO _IOWR('i', 145, struct nmreq) /* return IF info */
|
|
#define NIOCREGIF _IOWR('i', 146, struct nmreq) /* interface register */
|
|
#define NIOCTXSYNC _IO('i', 148) /* sync tx queues */
|
|
#define NIOCRXSYNC _IO('i', 149) /* sync rx queues */
|
|
#define NIOCCONFIG _IOWR('i',150, struct nm_ifreq) /* for ext. modules */
|
|
#endif /* !NIOCREGIF */
|
|
|
|
|
|
/*
|
|
* Helper functions for kernel and userspace
|
|
*/
|
|
|
|
/*
|
|
* check if space is available in the ring.
|
|
*/
|
|
static inline int
|
|
nm_ring_empty(struct netmap_ring *ring)
|
|
{
|
|
return (ring->cur == ring->tail);
|
|
}
|
|
|
|
/*
|
|
* Opaque structure that is passed to an external kernel
|
|
* module via ioctl(fd, NIOCCONFIG, req) for a user-owned
|
|
* bridge port (at this point ephemeral VALE interface).
|
|
*/
|
|
#define NM_IFRDATA_LEN 256
|
|
struct nm_ifreq {
|
|
char nifr_name[IFNAMSIZ];
|
|
char data[NM_IFRDATA_LEN];
|
|
};
|
|
|
|
/*
|
|
* netmap kernel thread configuration
|
|
*/
|
|
/* bhyve/vmm.ko MSIX parameters for IOCTL */
|
|
struct ptn_vmm_ioctl_msix {
|
|
uint64_t msg;
|
|
uint64_t addr;
|
|
};
|
|
|
|
/* IOCTL parameters */
|
|
struct nm_kth_ioctl {
|
|
uint64_t com;
|
|
/* We use union to support more ioctl commands. */
|
|
union {
|
|
struct ptn_vmm_ioctl_msix msix;
|
|
} data;
|
|
};
|
|
|
|
/* Configuration of a ptnetmap ring */
|
|
struct ptnet_ring_cfg {
|
|
uint64_t ioeventfd; /* eventfd in linux, tsleep() parameter in FreeBSD */
|
|
uint64_t irqfd; /* eventfd in linux, ioctl fd in FreeBSD */
|
|
struct nm_kth_ioctl ioctl; /* ioctl parameter to send irq (only used in bhyve/FreeBSD) */
|
|
uint64_t reserved[4]; /* reserved to support of more hypervisors */
|
|
};
|
|
#endif /* _NET_NETMAP_H_ */
|