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")
Cc: stable@dpdk.org
Signed-off-by: Chas Williams <ciwillia@brocade.com>
Acked-by: Jan Blunck <jblunck@infradead.org>
Acked-by: Shrikrishna Khare <skhare@vmware.com>

diff --git a/drivers/net/vmxnet3/vmxnet3_ring.h b/drivers/net/vmxnet3/vmxnet3_ring.h
index 0ce46c5..d2e8323 100644 (file)
--- 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 (file)
--- 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 @@ rcd_done:
        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 */