From c9c74288f01d0de2b6bfe5e86ef9b6f098dd9ec0 Mon Sep 17 00:00:00 2001 From: Renata Saiakhova Date: Fri, 10 Jul 2020 22:43:42 +0100 Subject: [PATCH] ethdev: add function to release HW rings Free previously allocated memzone for HW rings Signed-off-by: Renata Saiakhova Reviewed-by: Ferruh Yigit Acked-by: Andrew Rybchenko --- lib/librte_ethdev/rte_ethdev.c | 36 ++++++++++++++++++++++-- lib/librte_ethdev/rte_ethdev_driver.h | 17 +++++++++++ lib/librte_ethdev/rte_ethdev_version.map | 6 ++++ 3 files changed, 57 insertions(+), 2 deletions(-) diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c index 598ff80a6e..7858ad5f11 100644 --- a/lib/librte_ethdev/rte_ethdev.c +++ b/lib/librte_ethdev/rte_ethdev.c @@ -4201,6 +4201,14 @@ rte_eth_dev_rx_intr_ctl_q_get_fd(uint16_t port_id, uint16_t queue_id) return fd; } +static inline int +eth_dma_mzone_name(char *name, size_t len, uint16_t port_id, uint16_t queue_id, + const char *ring_name) +{ + return snprintf(name, len, "eth_p%d_q%d_%s", + port_id, queue_id, ring_name); +} + const struct rte_memzone * rte_eth_dma_zone_reserve(const struct rte_eth_dev *dev, const char *ring_name, uint16_t queue_id, size_t size, unsigned align, @@ -4210,8 +4218,8 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev *dev, const char *ring_name, const struct rte_memzone *mz; int rc; - rc = snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s", - dev->data->port_id, queue_id, ring_name); + rc = eth_dma_mzone_name(z_name, sizeof(z_name), dev->data->port_id, + queue_id, ring_name); if (rc >= RTE_MEMZONE_NAMESIZE) { RTE_ETHDEV_LOG(ERR, "ring name too long\n"); rte_errno = ENAMETOOLONG; @@ -4236,6 +4244,30 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev *dev, const char *ring_name, RTE_MEMZONE_IOVA_CONTIG, align); } +int +rte_eth_dma_zone_free(const struct rte_eth_dev *dev, const char *ring_name, + uint16_t queue_id) +{ + char z_name[RTE_MEMZONE_NAMESIZE]; + const struct rte_memzone *mz; + int rc = 0; + + rc = eth_dma_mzone_name(z_name, sizeof(z_name), dev->data->port_id, + queue_id, ring_name); + if (rc >= RTE_MEMZONE_NAMESIZE) { + RTE_ETHDEV_LOG(ERR, "ring name too long\n"); + return -ENAMETOOLONG; + } + + mz = rte_memzone_lookup(z_name); + if (mz) + rc = rte_memzone_free(mz); + else + rc = -ENOENT; + + return rc; +} + int rte_eth_dev_create(struct rte_device *device, const char *name, size_t priv_data_size, diff --git a/lib/librte_ethdev/rte_ethdev_driver.h b/lib/librte_ethdev/rte_ethdev_driver.h index 99d4cd6cd0..13fd049c0d 100644 --- a/lib/librte_ethdev/rte_ethdev_driver.h +++ b/lib/librte_ethdev/rte_ethdev_driver.h @@ -180,6 +180,23 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev *eth_dev, const char *name, uint16_t queue_id, size_t size, unsigned align, int socket_id); +/** + * Free previously allocated memzone for HW rings. + * + * @param eth_dev + * The *eth_dev* pointer is the address of the *rte_eth_dev* structure + * @param name + * The name of the memory zone + * @param queue_id + * The index of the queue to add to name + * @return + * Negative errno value on error, 0 on success. + */ +__rte_internal +int +rte_eth_dma_zone_free(const struct rte_eth_dev *eth_dev, const char *name, + uint16_t queue_id); + /** * @internal * Atomically set the link status for the specific device. diff --git a/lib/librte_ethdev/rte_ethdev_version.map b/lib/librte_ethdev/rte_ethdev_version.map index 7155056045..1212a17d32 100644 --- a/lib/librte_ethdev/rte_ethdev_version.map +++ b/lib/librte_ethdev/rte_ethdev_version.map @@ -242,3 +242,9 @@ EXPERIMENTAL { __rte_ethdev_trace_tx_burst; rte_flow_get_aged_flows; }; + +INTERNAL { + global: + + rte_eth_dma_zone_free; +}; -- 2.20.1