From 651c505af862e588e76df9abc38555480d3cffd9 Mon Sep 17 00:00:00 2001 From: Bruce Richardson Date: Wed, 30 Sep 2015 13:12:19 +0100 Subject: [PATCH] ring: enhance device setup from rings The ring ethdev creation function creates an ethdev, but does not actually set it up for use. Even if it's just a single ring, the user still needs to create a mempool, call rte_eth_dev_configure, then call rx and tx setup functions before the ethdev can be used. This patch changes things so that the ethdev is fully set up after the call to create the ethdev. The above-mentionned functions can still be called - as will be the case, for instance, if the NIC is created via commandline parameters - but they no longer are essential. The function now also sets rte_errno appropriately on error, so the caller can get a better indication of why a call may have failed. Signed-off-by: Bruce Richardson Acked-by: Pablo de Lara --- drivers/net/ring/rte_eth_ring.c | 47 ++++++++++++++++++++++++++++----- 1 file changed, 41 insertions(+), 6 deletions(-) diff --git a/drivers/net/ring/rte_eth_ring.c b/drivers/net/ring/rte_eth_ring.c index 0ba36d51b2..bfd6f4e943 100644 --- a/drivers/net/ring/rte_eth_ring.c +++ b/drivers/net/ring/rte_eth_ring.c @@ -39,6 +39,7 @@ #include #include #include +#include #define ETH_RING_NUMA_NODE_ACTION_ARG "nodeaction" #define ETH_RING_ACTION_CREATE "CREATE" @@ -276,10 +277,18 @@ rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[], unsigned i; /* do some parameter checking */ - if (rx_queues == NULL && nb_rx_queues > 0) + if (rx_queues == NULL && nb_rx_queues > 0) { + rte_errno = EINVAL; goto error; - if (tx_queues == NULL && nb_tx_queues > 0) + } + if (tx_queues == NULL && nb_tx_queues > 0) { + rte_errno = EINVAL; + goto error; + } + if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) { + rte_errno = EINVAL; goto error; + } RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n", numa_node); @@ -288,21 +297,43 @@ rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[], * and internal (private) data */ data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node); - if (data == NULL) + 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; + } pci_dev = rte_zmalloc_socket(name, sizeof(*pci_dev), 0, numa_node); - if (pci_dev == NULL) + if (pci_dev == NULL) { + rte_errno = ENOMEM; goto error; + } internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node); - if (internals == NULL) + 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) + if (eth_dev == NULL) { + rte_errno = ENOSPC; goto error; + } /* now put it all together @@ -318,9 +349,11 @@ rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[], internals->nb_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]; } rte_ring_pmd.pci_drv.name = ring_ethdev_driver_name; @@ -350,6 +383,8 @@ rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[], return data->port_id; error: + rte_free(data->rx_queues); + rte_free(data->tx_queues); rte_free(data); rte_free(pci_dev); rte_free(internals); -- 2.20.1