On 6/22/2020 10:54 AM, Renata Saiakhova wrote:
> Free previously allocated memzone for HW rings
>
> Signed-off-by: Renata Saiakhova <renata.saiakh...@ekinops.com>
> ---
> lib/librte_ethdev/rte_ethdev.c | 30 ++++++++++++++++++++++--
> lib/librte_ethdev/rte_ethdev_driver.h | 20 ++++++++++++++++
> lib/librte_ethdev/rte_ethdev_version.map | 1 +
> 3 files changed, 49 insertions(+), 2 deletions(-)
>
> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> index 72aed59a5..ec1da2006 100644
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> @@ -4181,6 +4181,10 @@ rte_eth_dev_rx_intr_ctl_q_get_fd(uint16_t port_id,
> uint16_t queue_id)
> return fd;
> }
>
> +#define ETH_DMA_MZONE_NAME(_name, _port_id, _queue_id, _ring_name) \
> + snprintf(_name, sizeof(_name), "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,
> @@ -4190,8 +4194,7 @@ 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, 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;
> @@ -4206,6 +4209,29 @@ 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, 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 = -EINVAL;
> +
> + 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 99d4cd6cd..462e765d1 100644
> --- a/lib/librte_ethdev/rte_ethdev_driver.h
> +++ b/lib/librte_ethdev/rte_ethdev_driver.h
> @@ -180,6 +180,26 @@ 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);
>
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change without prior notice.
> + *
> + * 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_experimental
> +int
> +rte_eth_dma_zone_free(const struct rte_eth_dev *dev, const char *ring_name,
> + uint16_t queue_id);
> +
Hi Renata,
This API is not for applications, only for drivers, right?
We recently (last release ?) introduced 'internal' (__rte_internal) attribute,
we can use '__rte_internal' instead of '__rte_experimental' if the API is not
for applications. This requires adding 'INTERNAL' block in .map file (sample
'lib/librte_eal/rte_eal_version.map')
Also there are a few contribution conventions related issues which can be fixed
while merging but please check them if you will be doing new version:
subsystem is only libname without prefix: 'ethdev'
Commit title description starts with lowercase: 'introduce'.
sample => "ethdev: add function to release HW rings"
Thanks,
ferruh
