> -----Original Message-----
> From: Charles (Chas) Williams [mailto:ciwil...@brocade.com]
> Sent: Wednesday, March 15, 2017 5:35 AM
> To: dev@dpdk.org
> Cc: Yong Wang <yongw...@vmware.com>; Charles (Chas) Williams
> <ciwil...@brocade.com>
> Subject: [PATCH] net/vmxnet3: fix queue size changes
>
> If the user reconfigures the queue size, then the previously allocated
> memzone may potentially be too small. Release the memzone when a
> queue
> is released and allocate a new one each time a queue is setup.
>
> While here convert to rte_eth_dma_zone_reserve() which does basically
> the same things as the private function.
>
> Fixes: dfaff37fc46d ("vmxnet3: import new vmxnet3 poll mode driver
> implementation")
>
> Signed-off-by: Chas Williams <ciwil...@brocade.com>
> ---
Looks good to me and cc-ing Shrikrishna, the new vmxnet3 pmd maintainer.
> drivers/net/vmxnet3/vmxnet3_ring.h | 2 ++
> drivers/net/vmxnet3/vmxnet3_rxtx.c | 37 +++++++++++-----------------------
> ---
> 2 files changed, 13 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/net/vmxnet3/vmxnet3_ring.h
> b/drivers/net/vmxnet3/vmxnet3_ring.h
> index 0ce46c5..d2e8323 100644
> --- a/drivers/net/vmxnet3/vmxnet3_ring.h
> +++ b/drivers/net/vmxnet3/vmxnet3_ring.h
> @@ -141,6 +141,7 @@ typedef struct vmxnet3_tx_queue {
> uint32_t qid;
> struct Vmxnet3_TxQueueDesc *shared;
> struct vmxnet3_txq_stats stats;
> + const struct rte_memzone *mz;
> bool stopped;
> uint16_t queue_id; /**< Device TX queue index.
> */
> uint8_t port_id; /**< Device port
> identifier. */
> @@ -175,6 +176,7 @@ typedef struct vmxnet3_rx_queue {
> struct rte_mbuf *start_seg;
> struct rte_mbuf *last_seg;
> struct vmxnet3_rxq_stats stats;
> + const struct rte_memzone *mz;
> bool stopped;
> uint16_t queue_id; /**< Device RX queue index.
> */
> uint8_t port_id; /**< Device port identifier.
> */
> diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c
> b/drivers/net/vmxnet3/vmxnet3_rxtx.c
> index 6649c3f..e865c67 100644
> --- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
> +++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
> @@ -201,6 +201,8 @@ vmxnet3_dev_tx_queue_release(void *txq)
> vmxnet3_tx_cmd_ring_release_mbufs(&tq->cmd_ring);
> /* Release the cmd_ring */
> vmxnet3_cmd_ring_release(&tq->cmd_ring);
> + /* Release the memzone */
> + rte_memzone_free(tq->mz);
> }
> }
>
> @@ -218,6 +220,9 @@ vmxnet3_dev_rx_queue_release(void *rxq)
> /* Release both the cmd_rings */
> for (i = 0; i < VMXNET3_RX_CMDRING_SIZE; i++)
> vmxnet3_cmd_ring_release(&rq->cmd_ring[i]);
> +
> + /* Release the memzone */
> + rte_memzone_free(rq->mz);
> }
> }
>
> @@ -891,30 +896,6 @@ vmxnet3_recv_pkts(void *rx_queue, struct
> rte_mbuf **rx_pkts, uint16_t nb_pkts)
> return nb_rx;
> }
>
> -/*
> - * Create memzone for device rings. malloc can't be used as the physical
> address is
> - * needed. If the memzone is already created, then this function returns a
> ptr
> - * to the old one.
> - */
> -static const struct rte_memzone *
> -ring_dma_zone_reserve(struct rte_eth_dev *dev, const char *ring_name,
> - uint16_t queue_id, uint32_t ring_size, int socket_id)
> -{
> - char z_name[RTE_MEMZONE_NAMESIZE];
> - const struct rte_memzone *mz;
> -
> - snprintf(z_name, sizeof(z_name), "%s_%s_%d_%d",
> - dev->driver->pci_drv.driver.name, ring_name,
> - dev->data->port_id, queue_id);
> -
> - mz = rte_memzone_lookup(z_name);
> - if (mz)
> - return mz;
> -
> - return rte_memzone_reserve_aligned(z_name, ring_size,
> - socket_id, 0,
> VMXNET3_RING_BA_ALIGN);
> -}
> -
> int
> vmxnet3_dev_tx_queue_setup(struct rte_eth_dev *dev,
> uint16_t queue_idx,
> @@ -983,11 +964,13 @@ vmxnet3_dev_tx_queue_setup(struct
> rte_eth_dev *dev,
> size += sizeof(struct Vmxnet3_TxCompDesc) * comp_ring->size;
> size += txq->txdata_desc_size * data_ring->size;
>
> - mz = ring_dma_zone_reserve(dev, "txdesc", queue_idx, size,
> socket_id);
> + mz = rte_eth_dma_zone_reserve(dev, "txdesc", queue_idx, size,
> + VMXNET3_RING_BA_ALIGN, socket_id);
> if (mz == NULL) {
> PMD_INIT_LOG(ERR, "ERROR: Creating queue descriptors
> zone");
> return -ENOMEM;
> }
> + txq->mz = mz;
> memset(mz->addr, 0, mz->len);
>
> /* cmd_ring initialization */
> @@ -1092,11 +1075,13 @@ vmxnet3_dev_rx_queue_setup(struct
> rte_eth_dev *dev,
> if (VMXNET3_VERSION_GE_3(hw) && rxq->data_desc_size)
> size += rxq->data_desc_size * data_ring->size;
>
> - mz = ring_dma_zone_reserve(dev, "rxdesc", queue_idx, size,
> socket_id);
> + mz = rte_eth_dma_zone_reserve(dev, "rxdesc", queue_idx, size,
> + VMXNET3_RING_BA_ALIGN, socket_id);
> if (mz == NULL) {
> PMD_INIT_LOG(ERR, "ERROR: Creating queue descriptors
> zone");
> return -ENOMEM;
> }
> + rxq->mz = mz;
> memset(mz->addr, 0, mz->len);
>
> /* cmd_ring0 initialization */
> --
> 2.1.4
