--- /dev/null
+/*
+ * 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: head/sys/net/netmap.h 251139 2013-05-30 14:07:14Z luigi $
+ *
+ * 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 14 /* current API version */
+
+#define NETMAP_MIN_API 14 /* 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
+ */
+
+/*
+ * 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
+
+
+/*
+ * 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 {
+ u_long com;
+ /* TODO: use union */
+ 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) */
+};
+#endif /* _NET_NETMAP_H_ */
Code Review / vpp.git / blobdiff