--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2015 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 "rte_eth_ring.h"
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_memcpy.h>
+#include <rte_memzone.h>
+#include <rte_string_fns.h>
+#include <rte_dev.h>
+#include <rte_kvargs.h>
+#include <rte_errno.h>
+
+#define ETH_RING_NUMA_NODE_ACTION_ARG "nodeaction"
+#define ETH_RING_ACTION_CREATE "CREATE"
+#define ETH_RING_ACTION_ATTACH "ATTACH"
+
+static const char *valid_arguments[] = {
+ ETH_RING_NUMA_NODE_ACTION_ARG,
+ NULL
+};
+
+enum dev_action {
+ DEV_CREATE,
+ DEV_ATTACH
+};
+
+struct ring_queue {
+ struct rte_ring *rng;
+ rte_atomic64_t rx_pkts;
+ rte_atomic64_t tx_pkts;
+ rte_atomic64_t err_pkts;
+};
+
+struct pmd_internals {
+ unsigned max_rx_queues;
+ unsigned max_tx_queues;
+
+ struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
+ struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
+
+ struct ether_addr address;
+ enum dev_action action;
+};
+
+
+static const char *drivername = "Rings PMD";
+static struct rte_eth_link pmd_link = {
+ .link_speed = ETH_SPEED_NUM_10G,
+ .link_duplex = ETH_LINK_FULL_DUPLEX,
+ .link_status = ETH_LINK_DOWN,
+ .link_autoneg = ETH_LINK_SPEED_AUTONEG
+};
+
+static uint16_t
+eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
+{
+ void **ptrs = (void *)&bufs[0];
+ struct ring_queue *r = q;
+ const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
+ ptrs, nb_bufs);
+ if (r->rng->flags & RING_F_SC_DEQ)
+ r->rx_pkts.cnt += nb_rx;
+ else
+ rte_atomic64_add(&(r->rx_pkts), nb_rx);
+ return nb_rx;
+}
+
+static uint16_t
+eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
+{
+ void **ptrs = (void *)&bufs[0];
+ struct ring_queue *r = q;
+ const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
+ ptrs, nb_bufs);
+ if (r->rng->flags & RING_F_SP_ENQ) {
+ r->tx_pkts.cnt += nb_tx;
+ r->err_pkts.cnt += nb_bufs - nb_tx;
+ } else {
+ rte_atomic64_add(&(r->tx_pkts), nb_tx);
+ rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
+ }
+ return nb_tx;
+}
+
+static int
+eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
+
+static int
+eth_dev_start(struct rte_eth_dev *dev)
+{
+ dev->data->dev_link.link_status = ETH_LINK_UP;
+ return 0;
+}
+
+static void
+eth_dev_stop(struct rte_eth_dev *dev)
+{
+ dev->data->dev_link.link_status = ETH_LINK_DOWN;
+}
+
+static int
+eth_dev_set_link_down(struct rte_eth_dev *dev)
+{
+ dev->data->dev_link.link_status = ETH_LINK_DOWN;
+ return 0;
+}
+
+static int
+eth_dev_set_link_up(struct rte_eth_dev *dev)
+{
+ dev->data->dev_link.link_status = ETH_LINK_UP;
+ return 0;
+}
+
+static int
+eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
+ uint16_t nb_rx_desc __rte_unused,
+ unsigned int socket_id __rte_unused,
+ const struct rte_eth_rxconf *rx_conf __rte_unused,
+ struct rte_mempool *mb_pool __rte_unused)
+{
+ struct pmd_internals *internals = dev->data->dev_private;
+ dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
+ return 0;
+}
+
+static int
+eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
+ uint16_t nb_tx_desc __rte_unused,
+ unsigned int socket_id __rte_unused,
+ const struct rte_eth_txconf *tx_conf __rte_unused)
+{
+ struct pmd_internals *internals = dev->data->dev_private;
+ dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
+ return 0;
+}
+
+
+static void
+eth_dev_info(struct rte_eth_dev *dev,
+ struct rte_eth_dev_info *dev_info)
+{
+ struct pmd_internals *internals = dev->data->dev_private;
+ dev_info->driver_name = drivername;
+ dev_info->max_mac_addrs = 1;
+ dev_info->max_rx_pktlen = (uint32_t)-1;
+ dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
+ dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
+ dev_info->min_rx_bufsize = 0;
+ dev_info->pci_dev = NULL;
+}
+
+static void
+eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+ unsigned i;
+ unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
+ const struct pmd_internals *internal = dev->data->dev_private;
+
+ for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
+ i < dev->data->nb_rx_queues; i++) {
+ stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
+ rx_total += stats->q_ipackets[i];
+ }
+
+ for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
+ i < dev->data->nb_tx_queues; i++) {
+ stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
+ stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
+ tx_total += stats->q_opackets[i];
+ tx_err_total += stats->q_errors[i];
+ }
+
+ stats->ipackets = rx_total;
+ stats->opackets = tx_total;
+ stats->oerrors = tx_err_total;
+}
+
+static void
+eth_stats_reset(struct rte_eth_dev *dev)
+{
+ unsigned i;
+ struct pmd_internals *internal = dev->data->dev_private;
+ for (i = 0; i < dev->data->nb_rx_queues; i++)
+ internal->rx_ring_queues[i].rx_pkts.cnt = 0;
+ for (i = 0; i < dev->data->nb_tx_queues; i++) {
+ internal->tx_ring_queues[i].tx_pkts.cnt = 0;
+ internal->tx_ring_queues[i].err_pkts.cnt = 0;
+ }
+}
+
+static void
+eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
+ uint32_t index __rte_unused)
+{
+}
+
+static void
+eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
+ struct ether_addr *mac_addr __rte_unused,
+ uint32_t index __rte_unused,
+ uint32_t vmdq __rte_unused)
+{
+}
+
+static void
+eth_queue_release(void *q __rte_unused) { ; }
+static int
+eth_link_update(struct rte_eth_dev *dev __rte_unused,
+ int wait_to_complete __rte_unused) { return 0; }
+
+static const struct eth_dev_ops ops = {
+ .dev_start = eth_dev_start,
+ .dev_stop = eth_dev_stop,
+ .dev_set_link_up = eth_dev_set_link_up,
+ .dev_set_link_down = eth_dev_set_link_down,
+ .dev_configure = eth_dev_configure,
+ .dev_infos_get = eth_dev_info,
+ .rx_queue_setup = eth_rx_queue_setup,
+ .tx_queue_setup = eth_tx_queue_setup,
+ .rx_queue_release = eth_queue_release,
+ .tx_queue_release = eth_queue_release,
+ .link_update = eth_link_update,
+ .stats_get = eth_stats_get,
+ .stats_reset = eth_stats_reset,
+ .mac_addr_remove = eth_mac_addr_remove,
+ .mac_addr_add = eth_mac_addr_add,
+};
+
+static int
+do_eth_dev_ring_create(const char *name,
+ struct rte_ring * const rx_queues[], const unsigned nb_rx_queues,
+ struct rte_ring *const tx_queues[], const unsigned nb_tx_queues,
+ const unsigned numa_node, enum dev_action action)
+{
+ struct rte_eth_dev_data *data = NULL;
+ struct pmd_internals *internals = NULL;
+ struct rte_eth_dev *eth_dev = NULL;
+ unsigned i;
+
+ RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
+ numa_node);
+
+ /* now do all data allocation - for eth_dev structure, dummy pci driver
+ * and internal (private) data
+ */
+ data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
+ if (data == NULL) {
+ rte_errno = ENOMEM;
+ goto error;
+ }
+
+ data->rx_queues = rte_zmalloc_socket(name,
+ sizeof(void *) * nb_rx_queues, 0, numa_node);
+ if (data->rx_queues == NULL) {
+ rte_errno = ENOMEM;
+ goto error;
+ }
+
+ data->tx_queues = rte_zmalloc_socket(name,
+ sizeof(void *) * nb_tx_queues, 0, numa_node);
+ if (data->tx_queues == NULL) {
+ rte_errno = ENOMEM;
+ goto error;
+ }
+
+ internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
+ if (internals == NULL) {
+ rte_errno = ENOMEM;
+ goto error;
+ }
+
+ /* reserve an ethdev entry */
+ eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
+ if (eth_dev == NULL) {
+ rte_errno = ENOSPC;
+ goto error;
+ }
+
+ /* now put it all together
+ * - store queue data in internals,
+ * - store numa_node info in eth_dev_data
+ * - point eth_dev_data to internals
+ * - and point eth_dev structure to new eth_dev_data structure
+ */
+ /* NOTE: we'll replace the data element, of originally allocated eth_dev
+ * so the rings are local per-process */
+
+ internals->action = action;
+ internals->max_rx_queues = nb_rx_queues;
+ internals->max_tx_queues = nb_tx_queues;
+ for (i = 0; i < nb_rx_queues; i++) {
+ internals->rx_ring_queues[i].rng = rx_queues[i];
+ data->rx_queues[i] = &internals->rx_ring_queues[i];
+ }
+ for (i = 0; i < nb_tx_queues; i++) {
+ internals->tx_ring_queues[i].rng = tx_queues[i];
+ data->tx_queues[i] = &internals->tx_ring_queues[i];
+ }
+
+ data->dev_private = internals;
+ data->port_id = eth_dev->data->port_id;
+ memmove(data->name, eth_dev->data->name, sizeof(data->name));
+ data->nb_rx_queues = (uint16_t)nb_rx_queues;
+ data->nb_tx_queues = (uint16_t)nb_tx_queues;
+ data->dev_link = pmd_link;
+ data->mac_addrs = &internals->address;
+
+ eth_dev->data = data;
+ eth_dev->driver = NULL;
+ eth_dev->dev_ops = &ops;
+ data->dev_flags = RTE_ETH_DEV_DETACHABLE;
+ data->kdrv = RTE_KDRV_NONE;
+ data->drv_name = drivername;
+ data->numa_node = numa_node;
+
+ TAILQ_INIT(&(eth_dev->link_intr_cbs));
+
+ /* finally assign rx and tx ops */
+ eth_dev->rx_pkt_burst = eth_ring_rx;
+ eth_dev->tx_pkt_burst = eth_ring_tx;
+
+ return data->port_id;
+
+error:
+ if (data) {
+ rte_free(data->rx_queues);
+ rte_free(data->tx_queues);
+ }
+ rte_free(data);
+ rte_free(internals);
+
+ return -1;
+}
+
+int
+rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
+ const unsigned nb_rx_queues,
+ struct rte_ring *const tx_queues[],
+ const unsigned nb_tx_queues,
+ const unsigned numa_node)
+{
+ /* do some parameter checking */
+ if (rx_queues == NULL && nb_rx_queues > 0) {
+ rte_errno = EINVAL;
+ return -1;
+ }
+ if (tx_queues == NULL && nb_tx_queues > 0) {
+ rte_errno = EINVAL;
+ return -1;
+ }
+ if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
+ rte_errno = EINVAL;
+ return -1;
+ }
+
+ return do_eth_dev_ring_create(name, rx_queues, nb_rx_queues,
+ tx_queues, nb_tx_queues, numa_node, DEV_ATTACH);
+}
+
+int
+rte_eth_from_ring(struct rte_ring *r)
+{
+ return rte_eth_from_rings(r->name, &r, 1, &r, 1,
+ r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
+}
+
+static int
+eth_dev_ring_create(const char *name, const unsigned numa_node,
+ enum dev_action action)
+{
+ /* rx and tx are so-called from point of view of first port.
+ * They are inverted from the point of view of second port
+ */
+ struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
+ unsigned i;
+ char rng_name[RTE_RING_NAMESIZE];
+ unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
+ RTE_PMD_RING_MAX_TX_RINGS);
+
+ for (i = 0; i < num_rings; i++) {
+ snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
+ rxtx[i] = (action == DEV_CREATE) ?
+ rte_ring_create(rng_name, 1024, numa_node,
+ RING_F_SP_ENQ|RING_F_SC_DEQ) :
+ rte_ring_lookup(rng_name);
+ if (rxtx[i] == NULL)
+ return -1;
+ }
+
+ if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
+ numa_node, action) < 0)
+ return -1;
+
+ return 0;
+}
+
+struct node_action_pair {
+ char name[PATH_MAX];
+ unsigned node;
+ enum dev_action action;
+};
+
+struct node_action_list {
+ unsigned total;
+ unsigned count;
+ struct node_action_pair *list;
+};
+
+static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
+{
+ struct node_action_list *info = data;
+ int ret;
+ char *name;
+ char *action;
+ char *node;
+ char *end;
+
+ name = strdup(value);
+
+ ret = -EINVAL;
+
+ if (!name) {
+ RTE_LOG(WARNING, PMD, "command line paramter is empty for ring pmd!\n");
+ goto out;
+ }
+
+ node = strchr(name, ':');
+ if (!node) {
+ RTE_LOG(WARNING, PMD, "could not parse node value from %s", name);
+ goto out;
+ }
+
+ *node = '\0';
+ node++;
+
+ action = strchr(node, ':');
+ if (!action) {
+ RTE_LOG(WARNING, PMD, "could not action value from %s", node);
+ goto out;
+ }
+
+ *action = '\0';
+ action++;
+
+ /*
+ * Need to do some sanity checking here
+ */
+
+ if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
+ info->list[info->count].action = DEV_ATTACH;
+ else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
+ info->list[info->count].action = DEV_CREATE;
+ else
+ goto out;
+
+ errno = 0;
+ info->list[info->count].node = strtol(node, &end, 10);
+
+ if ((errno != 0) || (*end != '\0')) {
+ RTE_LOG(WARNING, PMD, "node value %s is unparseable as a number\n", node);
+ goto out;
+ }
+
+ snprintf(info->list[info->count].name, sizeof(info->list[info->count].name), "%s", name);
+
+ info->count++;
+
+ ret = 0;
+out:
+ free(name);
+ return ret;
+}
+
+static int
+rte_pmd_ring_devinit(const char *name, const char *params)
+{
+ struct rte_kvargs *kvlist = NULL;
+ int ret = 0;
+ struct node_action_list *info = NULL;
+
+ RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);
+
+ if (params == NULL || params[0] == '\0') {
+ ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);
+ if (ret == -1) {
+ RTE_LOG(INFO, PMD,
+ "Attach to pmd_ring for %s\n", name);
+ ret = eth_dev_ring_create(name, rte_socket_id(),
+ DEV_ATTACH);
+ }
+ }
+ else {
+ kvlist = rte_kvargs_parse(params, valid_arguments);
+
+ if (!kvlist) {
+ RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
+ " rings-backed ethernet device\n");
+ ret = eth_dev_ring_create(name, rte_socket_id(),
+ DEV_CREATE);
+ if (ret == -1) {
+ RTE_LOG(INFO, PMD,
+ "Attach to pmd_ring for %s\n",
+ name);
+ ret = eth_dev_ring_create(name, rte_socket_id(),
+ DEV_ATTACH);
+ }
+ return ret;
+ } else {
+ ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
+ info = rte_zmalloc("struct node_action_list",
+ sizeof(struct node_action_list) +
+ (sizeof(struct node_action_pair) * ret),
+ 0);
+ if (!info)
+ goto out_free;
+
+ info->total = ret;
+ info->list = (struct node_action_pair*)(info + 1);
+
+ ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
+ parse_kvlist, info);
+
+ if (ret < 0)
+ goto out_free;
+
+ for (info->count = 0; info->count < info->total; info->count++) {
+ ret = eth_dev_ring_create(name,
+ info->list[info->count].node,
+ info->list[info->count].action);
+ if ((ret == -1) &&
+ (info->list[info->count].action == DEV_CREATE)) {
+ RTE_LOG(INFO, PMD,
+ "Attach to pmd_ring for %s\n",
+ name);
+ ret = eth_dev_ring_create(name,
+ info->list[info->count].node,
+ DEV_ATTACH);
+ }
+ }
+ }
+ }
+
+out_free:
+ rte_kvargs_free(kvlist);
+ rte_free(info);
+ return ret;
+}
+
+static int
+rte_pmd_ring_devuninit(const char *name)
+{
+ struct rte_eth_dev *eth_dev = NULL;
+ struct pmd_internals *internals = NULL;
+ struct ring_queue *r = NULL;
+ uint16_t i;
+
+ RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);
+
+ if (name == NULL)
+ return -EINVAL;
+
+ /* find an ethdev entry */
+ eth_dev = rte_eth_dev_allocated(name);
+ if (eth_dev == NULL)
+ return -ENODEV;
+
+ eth_dev_stop(eth_dev);
+
+ if (eth_dev->data) {
+ internals = eth_dev->data->dev_private;
+ if (internals->action == DEV_CREATE) {
+ /*
+ * it is only necessary to delete the rings in rx_queues because
+ * they are the same used in tx_queues
+ */
+ for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
+ r = eth_dev->data->rx_queues[i];
+ rte_ring_free(r->rng);
+ }
+ }
+
+ rte_free(eth_dev->data->rx_queues);
+ rte_free(eth_dev->data->tx_queues);
+ rte_free(eth_dev->data->dev_private);
+ }
+
+ rte_free(eth_dev->data);
+
+ rte_eth_dev_release_port(eth_dev);
+ return 0;
+}
+
+static struct rte_driver pmd_ring_drv = {
+ .name = "eth_ring",
+ .type = PMD_VDEV,
+ .init = rte_pmd_ring_devinit,
+ .uninit = rte_pmd_ring_devuninit,
+};
+
+PMD_REGISTER_DRIVER(pmd_ring_drv);
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