--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS 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 COPYRIGHT
+ * OWNER 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.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <poll.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <net/if.h>
+#include <sys/types.h>
+#include <sys/resource.h>
+#include <sys/mman.h>
+
+#include <rte_common.h>
+#include <rte_errno.h>
+#include <rte_ethdev.h>
+#include <rte_log.h>
+#include <rte_malloc.h>
+#include <rte_mbuf.h>
+#include <rte_memzone.h>
+#include <rte_spinlock.h>
+#include <rte_string_fns.h>
+
+#include "compat_netmap.h"
+
+struct netmap_port {
+ struct rte_mempool *pool;
+ struct netmap_if *nmif;
+ struct rte_eth_conf eth_conf;
+ struct rte_eth_txconf tx_conf;
+ struct rte_eth_rxconf rx_conf;
+ int32_t socket_id;
+ uint16_t nr_tx_rings;
+ uint16_t nr_rx_rings;
+ uint32_t nr_tx_slots;
+ uint32_t nr_rx_slots;
+ uint16_t tx_burst;
+ uint16_t rx_burst;
+ uint32_t fd;
+};
+
+struct fd_port {
+ uint32_t port;
+};
+
+#ifndef POLLRDNORM
+#define POLLRDNORM 0x0040
+#endif
+
+#ifndef POLLWRNORM
+#define POLLWRNORM 0x0100
+#endif
+
+#define FD_PORT_FREE UINT32_MAX
+#define FD_PORT_RSRV (FD_PORT_FREE - 1)
+
+struct netmap_state {
+ struct rte_netmap_conf conf;
+ uintptr_t buf_start;
+ void *mem;
+ uint32_t mem_sz;
+ uint32_t netif_memsz;
+};
+
+
+#define COMPAT_NETMAP_MAX_NOFILE (2 * RTE_MAX_ETHPORTS)
+#define COMPAT_NETMAP_MAX_BURST 64
+#define COMPAT_NETMAP_MAX_PKT_PER_SYNC (2 * COMPAT_NETMAP_MAX_BURST)
+
+static struct netmap_port ports[RTE_MAX_ETHPORTS];
+static struct netmap_state netmap;
+
+static struct fd_port fd_port[COMPAT_NETMAP_MAX_NOFILE];
+static const int next_fd_start = RLIMIT_NOFILE + 1;
+static rte_spinlock_t netmap_lock;
+
+#define IDX_TO_FD(x) ((x) + next_fd_start)
+#define FD_TO_IDX(x) ((x) - next_fd_start)
+#define FD_VALID(x) ((x) >= next_fd_start && \
+ (x) < (typeof (x))(RTE_DIM(fd_port) + next_fd_start))
+
+#define PORT_NUM_RINGS (2 * netmap.conf.max_rings)
+#define PORT_NUM_SLOTS (PORT_NUM_RINGS * netmap.conf.max_slots)
+
+#define BUF_IDX(port, ring, slot) \
+ (((port) * PORT_NUM_RINGS + (ring)) * netmap.conf.max_slots + \
+ (slot))
+
+#define NETMAP_IF_RING_OFS(rid, rings, slots) ({\
+ struct netmap_if *_if; \
+ struct netmap_ring *_rg; \
+ sizeof(*_if) + \
+ (rings) * sizeof(_if->ring_ofs[0]) + \
+ (rid) * sizeof(*_rg) + \
+ (slots) * sizeof(_rg->slot[0]); \
+ })
+
+static void netmap_unregif(uint32_t idx, uint32_t port);
+
+
+static int32_t
+ifname_to_portid(const char *ifname, uint8_t *port)
+{
+ char *endptr;
+ uint64_t portid;
+
+ errno = 0;
+ portid = strtoul(ifname, &endptr, 10);
+ if (endptr == ifname || *endptr != '\0' ||
+ portid >= RTE_DIM(ports) || errno != 0)
+ return -EINVAL;
+
+ *port = (uint8_t)portid;
+ return 0;
+}
+
+/**
+ * Given a dpdk mbuf, fill in the Netmap slot in ring r and its associated
+ * buffer with the data held by the mbuf.
+ * Note that mbuf chains are not supported.
+ */
+static void
+mbuf_to_slot(struct rte_mbuf *mbuf, struct netmap_ring *r, uint32_t index)
+{
+ char *data;
+ uint16_t length;
+
+ data = rte_pktmbuf_mtod(mbuf, char *);
+ length = rte_pktmbuf_data_len(mbuf);
+
+ if (length > r->nr_buf_size)
+ length = 0;
+
+ r->slot[index].len = length;
+ rte_memcpy(NETMAP_BUF(r, r->slot[index].buf_idx), data, length);
+}
+
+/**
+ * Given a Netmap ring and a slot index for that ring, construct a dpdk mbuf
+ * from the data held in the buffer associated with the slot.
+ * Allocation/deallocation of the dpdk mbuf are the responsability of the
+ * caller.
+ * Note that mbuf chains are not supported.
+ */
+static void
+slot_to_mbuf(struct netmap_ring *r, uint32_t index, struct rte_mbuf *mbuf)
+{
+ char *data;
+ uint16_t length;
+
+ rte_pktmbuf_reset(mbuf);
+ length = r->slot[index].len;
+ data = rte_pktmbuf_append(mbuf, length);
+
+ if (data != NULL)
+ rte_memcpy(data, NETMAP_BUF(r, r->slot[index].buf_idx), length);
+}
+
+static int32_t
+fd_reserve(void)
+{
+ uint32_t i;
+
+ for (i = 0; i != RTE_DIM(fd_port) && fd_port[i].port != FD_PORT_FREE;
+ i++)
+ ;
+
+ if (i == RTE_DIM(fd_port))
+ return -ENOMEM;
+
+ fd_port[i].port = FD_PORT_RSRV;
+ return IDX_TO_FD(i);
+}
+
+static int32_t
+fd_release(int32_t fd)
+{
+ uint32_t idx, port;
+
+ idx = FD_TO_IDX(fd);
+
+ if (!FD_VALID(fd) || (port = fd_port[idx].port) == FD_PORT_FREE)
+ return -EINVAL;
+
+ /* if we still have a valid port attached, release the port */
+ if (port < RTE_DIM(ports) && ports[port].fd == idx) {
+ netmap_unregif(idx, port);
+ }
+
+ fd_port[idx].port = FD_PORT_FREE;
+ return 0;
+}
+
+static int
+check_nmreq(struct nmreq *req, uint8_t *port)
+{
+ int32_t rc;
+ uint8_t portid;
+
+ if (req == NULL)
+ return -EINVAL;
+
+ if (req->nr_version != NETMAP_API) {
+ req->nr_version = NETMAP_API;
+ return -EINVAL;
+ }
+
+ if ((rc = ifname_to_portid(req->nr_name, &portid)) != 0) {
+ RTE_LOG(ERR, USER1, "Invalid interface name:\"%s\" "
+ "in NIOCGINFO call\n", req->nr_name);
+ return rc;
+ }
+
+ if (ports[portid].pool == NULL) {
+ RTE_LOG(ERR, USER1, "Misconfigured portid %hhu\n", portid);
+ return -EINVAL;
+ }
+
+ *port = portid;
+ return 0;
+}
+
+/**
+ * Simulate a Netmap NIOCGINFO ioctl: given a struct nmreq holding an interface
+ * name (a port number in our case), fill the struct nmreq in with advisory
+ * information about the interface: number of rings and their size, total memory
+ * required in the map, ...
+ * Those are preconfigured using rte_eth_{,tx,rx}conf and
+ * rte_netmap_port_conf structures
+ * and calls to rte_netmap_init_port() in the Netmap application.
+ */
+static int
+ioctl_niocginfo(__rte_unused int fd, void * param)
+{
+ uint8_t portid;
+ struct nmreq *req;
+ int32_t rc;
+
+ req = (struct nmreq *)param;
+ if ((rc = check_nmreq(req, &portid)) != 0)
+ return rc;
+
+ req->nr_tx_rings = (uint16_t)(ports[portid].nr_tx_rings - 1);
+ req->nr_rx_rings = (uint16_t)(ports[portid].nr_rx_rings - 1);
+ req->nr_tx_slots = ports[portid].nr_tx_slots;
+ req->nr_rx_slots = ports[portid].nr_rx_slots;
+
+ /* in current implementation we have all NETIFs shared aone region. */
+ req->nr_memsize = netmap.mem_sz;
+ req->nr_offset = 0;
+
+ return 0;
+}
+
+static void
+netmap_ring_setup(struct netmap_ring *ring, uint8_t port, uint32_t ringid,
+ uint32_t num_slots)
+{
+ uint32_t j;
+
+ ring->buf_ofs = netmap.buf_start - (uintptr_t)ring;
+ ring->num_slots = num_slots;
+ ring->cur = 0;
+ ring->reserved = 0;
+ ring->nr_buf_size = netmap.conf.max_bufsz;
+ ring->flags = 0;
+ ring->ts.tv_sec = 0;
+ ring->ts.tv_usec = 0;
+
+ for (j = 0; j < ring->num_slots; j++) {
+ ring->slot[j].buf_idx = BUF_IDX(port, ringid, j);
+ ring->slot[j].len = 0;
+ ring->flags = 0;
+ }
+}
+
+static int
+netmap_regif(struct nmreq *req, uint32_t idx, uint8_t port)
+{
+ struct netmap_if *nmif;
+ struct netmap_ring *ring;
+ uint32_t i, slots, start_ring;
+ int32_t rc;
+
+ if (ports[port].fd < RTE_DIM(fd_port)) {
+ RTE_LOG(ERR, USER1, "port %hhu already in use by fd: %u\n",
+ port, IDX_TO_FD(ports[port].fd));
+ return -EBUSY;
+ }
+ if (fd_port[idx].port != FD_PORT_RSRV) {
+ RTE_LOG(ERR, USER1, "fd: %u is misconfigured\n",
+ IDX_TO_FD(idx));
+ return -EBUSY;
+ }
+
+ nmif = ports[port].nmif;
+
+ /* setup netmap_if fields. */
+ memset(nmif, 0, netmap.netif_memsz);
+
+ /* only ALL rings supported right now. */
+ if (req->nr_ringid != 0)
+ return -EINVAL;
+
+ snprintf(nmif->ni_name, sizeof(nmif->ni_name), "%s", req->nr_name);
+ nmif->ni_version = req->nr_version;
+
+ /* Netmap uses ni_(r|t)x_rings + 1 */
+ nmif->ni_rx_rings = ports[port].nr_rx_rings - 1;
+ nmif->ni_tx_rings = ports[port].nr_tx_rings - 1;
+
+ /*
+ * Setup TX rings and slots.
+ * Refer to the comments in netmap.h for details
+ */
+
+ slots = 0;
+ for (i = 0; i < nmif->ni_tx_rings + 1; i++) {
+
+ nmif->ring_ofs[i] = NETMAP_IF_RING_OFS(i,
+ PORT_NUM_RINGS, slots);
+
+ ring = NETMAP_TXRING(nmif, i);
+ netmap_ring_setup(ring, port, i, ports[port].nr_tx_slots);
+ ring->avail = ring->num_slots;
+
+ slots += ports[port].nr_tx_slots;
+ }
+
+ /*
+ * Setup RX rings and slots.
+ * Refer to the comments in netmap.h for details
+ */
+
+ start_ring = i;
+
+ for (; i < nmif->ni_rx_rings + 1 + start_ring; i++) {
+
+ nmif->ring_ofs[i] = NETMAP_IF_RING_OFS(i,
+ PORT_NUM_RINGS, slots);
+
+ ring = NETMAP_RXRING(nmif, (i - start_ring));
+ netmap_ring_setup(ring, port, i, ports[port].nr_rx_slots);
+ ring->avail = 0;
+
+ slots += ports[port].nr_rx_slots;
+ }
+
+ if ((rc = rte_eth_dev_start(port)) < 0) {
+ RTE_LOG(ERR, USER1,
+ "Couldn't start ethernet device %s (error %d)\n",
+ req->nr_name, rc);
+ return rc;
+ }
+
+ /* setup fdi <--> port relationtip. */
+ ports[port].fd = idx;
+ fd_port[idx].port = port;
+
+ req->nr_memsize = netmap.mem_sz;
+ req->nr_offset = (uintptr_t)nmif - (uintptr_t)netmap.mem;
+
+ return 0;
+}
+
+/**
+ * Simulate a Netmap NIOCREGIF ioctl:
+ */
+static int
+ioctl_niocregif(int32_t fd, void * param)
+{
+ uint8_t portid;
+ int32_t rc;
+ uint32_t idx;
+ struct nmreq *req;
+
+ req = (struct nmreq *)param;
+ if ((rc = check_nmreq(req, &portid)) != 0)
+ return rc;
+
+ idx = FD_TO_IDX(fd);
+
+ rte_spinlock_lock(&netmap_lock);
+ rc = netmap_regif(req, idx, portid);
+ rte_spinlock_unlock(&netmap_lock);
+
+ return rc;
+}
+
+static void
+netmap_unregif(uint32_t idx, uint32_t port)
+{
+ fd_port[idx].port = FD_PORT_RSRV;
+ ports[port].fd = UINT32_MAX;
+ rte_eth_dev_stop((uint8_t)port);
+}
+
+/**
+ * Simulate a Netmap NIOCUNREGIF ioctl: put an interface running in Netmap
+ * mode back in "normal" mode. In our case, we just stop the port associated
+ * with this file descriptor.
+ */
+static int
+ioctl_niocunregif(int fd)
+{
+ uint32_t idx, port;
+ int32_t rc;
+
+ idx = FD_TO_IDX(fd);
+
+ rte_spinlock_lock(&netmap_lock);
+
+ port = fd_port[idx].port;
+ if (port < RTE_DIM(ports) && ports[port].fd == idx) {
+ netmap_unregif(idx, port);
+ rc = 0;
+ } else {
+ RTE_LOG(ERR, USER1,
+ "%s: %d is not associated with valid port\n",
+ __func__, fd);
+ rc = -EINVAL;
+ }
+
+ rte_spinlock_unlock(&netmap_lock);
+ return rc;
+}
+
+/**
+ * A call to rx_sync_ring will try to fill a Netmap RX ring with as many
+ * packets as it can hold coming from its dpdk port.
+ */
+static inline int
+rx_sync_ring(struct netmap_ring *ring, uint8_t port, uint16_t ring_number,
+ uint16_t max_burst)
+{
+ int32_t i, n_rx;
+ uint16_t burst_size;
+ uint32_t cur_slot, n_free_slots;
+ struct rte_mbuf *rx_mbufs[COMPAT_NETMAP_MAX_BURST];
+
+ n_free_slots = ring->num_slots - (ring->avail + ring->reserved);
+ n_free_slots = RTE_MIN(n_free_slots, max_burst);
+ cur_slot = (ring->cur + ring->avail) & (ring->num_slots - 1);
+
+ while (n_free_slots) {
+ burst_size = (uint16_t)RTE_MIN(n_free_slots, RTE_DIM(rx_mbufs));
+
+ /* receive up to burst_size packets from the NIC's queue */
+ n_rx = rte_eth_rx_burst(port, ring_number, rx_mbufs,
+ burst_size);
+
+ if (n_rx == 0)
+ return 0;
+ if (unlikely(n_rx < 0))
+ return -1;
+
+ /* Put those n_rx packets in the Netmap structures */
+ for (i = 0; i < n_rx ; i++) {
+ mbuf_to_slot(rx_mbufs[i], ring, cur_slot);
+ rte_pktmbuf_free(rx_mbufs[i]);
+ cur_slot = NETMAP_RING_NEXT(ring, cur_slot);
+ }
+
+ /* Update the Netmap ring structure to reflect the change */
+ ring->avail += n_rx;
+ n_free_slots -= n_rx;
+ }
+
+ return 0;
+}
+
+static inline int
+rx_sync_if(uint32_t port)
+{
+ uint16_t burst;
+ uint32_t i, rc;
+ struct netmap_if *nifp;
+ struct netmap_ring *r;
+
+ nifp = ports[port].nmif;
+ burst = ports[port].rx_burst;
+ rc = 0;
+
+ for (i = 0; i < nifp->ni_rx_rings + 1; i++) {
+ r = NETMAP_RXRING(nifp, i);
+ rx_sync_ring(r, (uint8_t)port, (uint16_t)i, burst);
+ rc += r->avail;
+ }
+
+ return rc;
+}
+
+/**
+ * Simulate a Netmap NIOCRXSYNC ioctl:
+ */
+static int
+ioctl_niocrxsync(int fd)
+{
+ uint32_t idx, port;
+
+ idx = FD_TO_IDX(fd);
+ if ((port = fd_port[idx].port) < RTE_DIM(ports) &&
+ ports[port].fd == idx) {
+ return rx_sync_if(fd_port[idx].port);
+ } else {
+ return -EINVAL;
+ }
+}
+
+/**
+ * A call to tx_sync_ring will try to empty a Netmap TX ring by converting its
+ * buffers into rte_mbufs and sending them out on the rings's dpdk port.
+ */
+static int
+tx_sync_ring(struct netmap_ring *ring, uint8_t port, uint16_t ring_number,
+ struct rte_mempool *pool, uint16_t max_burst)
+{
+ uint32_t i, n_tx;
+ uint16_t burst_size;
+ uint32_t cur_slot, n_used_slots;
+ struct rte_mbuf *tx_mbufs[COMPAT_NETMAP_MAX_BURST];
+
+ n_used_slots = ring->num_slots - ring->avail;
+ n_used_slots = RTE_MIN(n_used_slots, max_burst);
+ cur_slot = (ring->cur + ring->avail) & (ring->num_slots - 1);
+
+ while (n_used_slots) {
+ burst_size = (uint16_t)RTE_MIN(n_used_slots, RTE_DIM(tx_mbufs));
+
+ for (i = 0; i < burst_size; i++) {
+ tx_mbufs[i] = rte_pktmbuf_alloc(pool);
+ if (tx_mbufs[i] == NULL)
+ goto err;
+
+ slot_to_mbuf(ring, cur_slot, tx_mbufs[i]);
+ cur_slot = NETMAP_RING_NEXT(ring, cur_slot);
+ }
+
+ n_tx = rte_eth_tx_burst(port, ring_number, tx_mbufs,
+ burst_size);
+
+ /* Update the Netmap ring structure to reflect the change */
+ ring->avail += n_tx;
+ n_used_slots -= n_tx;
+
+ /* Return the mbufs that failed to transmit to their pool */
+ if (unlikely(n_tx != burst_size)) {
+ for (i = n_tx; i < burst_size; i++)
+ rte_pktmbuf_free(tx_mbufs[i]);
+ break;
+ }
+ }
+
+ return 0;
+
+err:
+ for (; i == 0; --i)
+ rte_pktmbuf_free(tx_mbufs[i]);
+
+ RTE_LOG(ERR, USER1,
+ "Couldn't get mbuf from mempool is the mempool too small?\n");
+ return -1;
+}
+
+static int
+tx_sync_if(uint32_t port)
+{
+ uint16_t burst;
+ uint32_t i, rc;
+ struct netmap_if *nifp;
+ struct netmap_ring *r;
+ struct rte_mempool *mp;
+
+ nifp = ports[port].nmif;
+ mp = ports[port].pool;
+ burst = ports[port].tx_burst;
+ rc = 0;
+
+ for (i = 0; i < nifp->ni_tx_rings + 1; i++) {
+ r = NETMAP_TXRING(nifp, i);
+ tx_sync_ring(r, (uint8_t)port, (uint16_t)i, mp, burst);
+ rc += r->avail;
+ }
+
+ return rc;
+}
+
+/**
+ * Simulate a Netmap NIOCTXSYNC ioctl:
+ */
+static inline int
+ioctl_nioctxsync(int fd)
+{
+ uint32_t idx, port;
+
+ idx = FD_TO_IDX(fd);
+ if ((port = fd_port[idx].port) < RTE_DIM(ports) &&
+ ports[port].fd == idx) {
+ return tx_sync_if(fd_port[idx].port);
+ } else {
+ return -EINVAL;
+ }
+}
+
+/**
+ * Give the library a mempool of rte_mbufs with which it can do the
+ * rte_mbuf <--> netmap slot conversions.
+ */
+int
+rte_netmap_init(const struct rte_netmap_conf *conf)
+{
+ size_t buf_ofs, nmif_sz, sz;
+ size_t port_rings, port_slots, port_bufs;
+ uint32_t i, port_num;
+
+ port_num = RTE_MAX_ETHPORTS;
+ port_rings = 2 * conf->max_rings;
+ port_slots = port_rings * conf->max_slots;
+ port_bufs = port_slots;
+
+ nmif_sz = NETMAP_IF_RING_OFS(port_rings, port_rings, port_slots);
+ sz = nmif_sz * port_num;
+
+ buf_ofs = RTE_ALIGN_CEIL(sz, RTE_CACHE_LINE_SIZE);
+ sz = buf_ofs + port_bufs * conf->max_bufsz * port_num;
+
+ if (sz > UINT32_MAX ||
+ (netmap.mem = rte_zmalloc_socket(__func__, sz,
+ RTE_CACHE_LINE_SIZE, conf->socket_id)) == NULL) {
+ RTE_LOG(ERR, USER1, "%s: failed to allocate %zu bytes\n",
+ __func__, sz);
+ return -ENOMEM;
+ }
+
+ netmap.mem_sz = sz;
+ netmap.netif_memsz = nmif_sz;
+ netmap.buf_start = (uintptr_t)netmap.mem + buf_ofs;
+ netmap.conf = *conf;
+
+ rte_spinlock_init(&netmap_lock);
+
+ /* Mark all ports as unused and set NETIF pointer. */
+ for (i = 0; i != RTE_DIM(ports); i++) {
+ ports[i].fd = UINT32_MAX;
+ ports[i].nmif = (struct netmap_if *)
+ ((uintptr_t)netmap.mem + nmif_sz * i);
+ }
+
+ /* Mark all fd_ports as unused. */
+ for (i = 0; i != RTE_DIM(fd_port); i++) {
+ fd_port[i].port = FD_PORT_FREE;
+ }
+
+ return 0;
+}
+
+
+int
+rte_netmap_init_port(uint8_t portid, const struct rte_netmap_port_conf *conf)
+{
+ int32_t ret;
+ uint16_t i;
+ uint16_t rx_slots, tx_slots;
+
+ if (conf == NULL ||
+ portid >= RTE_DIM(ports) ||
+ conf->nr_tx_rings > netmap.conf.max_rings ||
+ conf->nr_rx_rings > netmap.conf.max_rings) {
+ RTE_LOG(ERR, USER1, "%s(%hhu): invalid parameters\n",
+ __func__, portid);
+ return -EINVAL;
+ }
+
+ rx_slots = (uint16_t)rte_align32pow2(conf->nr_rx_slots);
+ tx_slots = (uint16_t)rte_align32pow2(conf->nr_tx_slots);
+
+ if (tx_slots > netmap.conf.max_slots ||
+ rx_slots > netmap.conf.max_slots) {
+ RTE_LOG(ERR, USER1, "%s(%hhu): invalid parameters\n",
+ __func__, portid);
+ return -EINVAL;
+ }
+
+ ret = rte_eth_dev_configure(portid, conf->nr_rx_rings,
+ conf->nr_tx_rings, conf->eth_conf);
+
+ if (ret < 0) {
+ RTE_LOG(ERR, USER1, "Couldn't configure port %hhu\n", portid);
+ return ret;
+ }
+
+ for (i = 0; i < conf->nr_tx_rings; i++) {
+ ret = rte_eth_tx_queue_setup(portid, i, tx_slots,
+ conf->socket_id, NULL);
+
+ if (ret < 0) {
+ RTE_LOG(ERR, USER1,
+ "Couldn't configure TX queue %"PRIu16" of "
+ "port %"PRIu8"\n",
+ i, portid);
+ return ret;
+ }
+
+ ret = rte_eth_rx_queue_setup(portid, i, rx_slots,
+ conf->socket_id, NULL, conf->pool);
+
+ if (ret < 0) {
+ RTE_LOG(ERR, USER1,
+ "Couldn't configure RX queue %"PRIu16" of "
+ "port %"PRIu8"\n",
+ i, portid);
+ return ret;
+ }
+ }
+
+ /* copy config to the private storage. */
+ ports[portid].eth_conf = conf->eth_conf[0];
+ ports[portid].pool = conf->pool;
+ ports[portid].socket_id = conf->socket_id;
+ ports[portid].nr_tx_rings = conf->nr_tx_rings;
+ ports[portid].nr_rx_rings = conf->nr_rx_rings;
+ ports[portid].nr_tx_slots = tx_slots;
+ ports[portid].nr_rx_slots = rx_slots;
+ ports[portid].tx_burst = conf->tx_burst;
+ ports[portid].rx_burst = conf->rx_burst;
+
+ return 0;
+}
+
+int
+rte_netmap_close(__rte_unused int fd)
+{
+ int32_t rc;
+
+ rte_spinlock_lock(&netmap_lock);
+ rc = fd_release(fd);
+ rte_spinlock_unlock(&netmap_lock);
+
+ if (rc < 0) {
+ errno =-rc;
+ rc = -1;
+ }
+ return rc;
+}
+
+int rte_netmap_ioctl(int fd, uint32_t op, void *param)
+{
+ int ret;
+
+ if (!FD_VALID(fd)) {
+ errno = EBADF;
+ return -1;
+ }
+
+ switch (op) {
+
+ case NIOCGINFO:
+ ret = ioctl_niocginfo(fd, param);
+ break;
+
+ case NIOCREGIF:
+ ret = ioctl_niocregif(fd, param);
+ break;
+
+ case NIOCUNREGIF:
+ ret = ioctl_niocunregif(fd);
+ break;
+
+ case NIOCRXSYNC:
+ ret = ioctl_niocrxsync(fd);
+ break;
+
+ case NIOCTXSYNC:
+ ret = ioctl_nioctxsync(fd);
+ break;
+
+ default:
+ ret = -ENOTTY;
+ }
+
+ if (ret < 0) {
+ errno = -ret;
+ ret = -1;
+ } else {
+ ret = 0;
+ }
+
+ return ret;
+}
+
+void *
+rte_netmap_mmap(void *addr, size_t length,
+ int prot, int flags, int fd, off_t offset)
+{
+ static const int cprot = PROT_WRITE | PROT_READ;
+
+ if (!FD_VALID(fd) || length + offset > netmap.mem_sz ||
+ (prot & cprot) != cprot ||
+ ((flags & MAP_FIXED) != 0 && addr != NULL)) {
+
+ errno = EINVAL;
+ return MAP_FAILED;
+ }
+
+ return (void *)((uintptr_t)netmap.mem + (uintptr_t)offset);
+}
+
+/**
+ * Return a "fake" file descriptor with a value above RLIMIT_NOFILE so that
+ * any attempt to use that file descriptor with the usual API will fail.
+ */
+int
+rte_netmap_open(__rte_unused const char *pathname, __rte_unused int flags)
+{
+ int fd;
+
+ rte_spinlock_lock(&netmap_lock);
+ fd = fd_reserve();
+ rte_spinlock_unlock(&netmap_lock);
+
+ if (fd < 0) {
+ errno = -fd;
+ fd = -1;
+ }
+ return fd;
+}
+
+/**
+ * Doesn't support timeout other than 0 or infinite (negative) timeout
+ */
+int
+rte_netmap_poll(struct pollfd *fds, nfds_t nfds, int timeout)
+{
+ int32_t count_it, ret;
+ uint32_t i, idx, port;
+ uint32_t want_rx, want_tx;
+
+ ret = 0;
+ do {
+ for (i = 0; i < nfds; i++) {
+
+ count_it = 0;
+
+ if (!FD_VALID(fds[i].fd) || fds[i].events == 0) {
+ fds[i].revents = 0;
+ continue;
+ }
+
+ idx = FD_TO_IDX(fds[i].fd);
+ if ((port = fd_port[idx].port) >= RTE_DIM(ports) ||
+ ports[port].fd != idx) {
+
+ fds[i].revents |= POLLERR;
+ ret++;
+ continue;
+ }
+
+ want_rx = fds[i].events & (POLLIN | POLLRDNORM);
+ want_tx = fds[i].events & (POLLOUT | POLLWRNORM);
+
+ if (want_rx && rx_sync_if(port) > 0) {
+ fds[i].revents = (uint16_t)
+ (fds[i].revents | want_rx);
+ count_it = 1;
+ }
+ if (want_tx && tx_sync_if(port) > 0) {
+ fds[i].revents = (uint16_t)
+ (fds[i].revents | want_tx);
+ count_it = 1;
+ }
+
+ ret += count_it;
+ }
+ }
+ while ((ret == 0 && timeout < 0) || timeout);
+
+ return ret;
+}
Code Review / deb_dpdk.git / blobdiff