[dpdk-stable] patch 'net/vmxnet3: fix queue size changes' has been queued to stable release 17.02.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 17.02.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/28/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 66294018fc22fe3b8728d95df412c0da90a81e3c Mon Sep 17 00:00:00 2001
From: Chas Williams <ciwillia at brocade.com>
Date: Wed, 15 Mar 2017 08:35:10 -0400
Subject: [PATCH] net/vmxnet3: fix queue size changes

[ upstream commit 04df93d1edac6e240911ac4210920b58d1c27dcd ]

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 <ciwillia at brocade.com>
Acked-by: Jan Blunck <jblunck at infradead.org>
Acked-by: Shrikrishna Khare <skhare at vmware.com>
---
 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 b50d2b0..a3d330c 100644
--- a/drivers/net/vmxnet3/vmxnet3_ring.h
+++ b/drivers/net/vmxnet3/vmxnet3_ring.h
@@ -138,6 +138,7 @@ 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. */
@@ -161,6 +162,7 @@ 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 b246884..12752f8 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);
 	}
 }
 
@@ -872,30 +877,6 @@ 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,
@@ -963,11 +944,13 @@ vmxnet3_dev_tx_queue_setup(struct rte_eth_dev *dev,
 	size += sizeof(struct Vmxnet3_TxCompDesc) * comp_ring->size;
 	size += sizeof(struct Vmxnet3_TxDataDesc) * 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 */
@@ -1065,11 +1048,13 @@ vmxnet3_dev_rx_queue_setup(struct rte_eth_dev *dev,
 	size = sizeof(struct Vmxnet3_RxDesc) * (ring0->size + ring1->size);
 	size += sizeof(struct Vmxnet3_RxCompDesc) * comp_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 */
-- 
1.9.0