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* [dpdk-dev] [PATCH] net/virtio: report max/min/align Tx desc limits in dev info
@ 2021-09-15 12:23 Andrew Rybchenko
  2021-09-15 15:48 ` Maxime Coquelin
  2021-09-28 15:34 ` Maxime Coquelin
  0 siblings, 2 replies; 3+ messages in thread
From: Andrew Rybchenko @ 2021-09-15 12:23 UTC (permalink / raw)
  To: Maxime Coquelin, Chenbo Xia; +Cc: dev, Ivan Ilchenko

From: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>

Report max/min/align Tx descriptors limits in device info get callback.
Before calling the callback, rte_eth_dev_info_get() provides
default values of nb_min as zero and nb_max as UINT16_MAX that are
not correct for the driver, so one can't rely on them.

Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
---
 drivers/net/virtio/virtio_ethdev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 6c7d9bf58d..be5e4c0011 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -2579,6 +2579,7 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		 * The Queue Size value does not have to be a power of 2.
 		 */
 		dev_info->rx_desc_lim.nb_max = UINT16_MAX;
+		dev_info->tx_desc_lim.nb_max = UINT16_MAX;
 	} else {
 		/*
 		 * According to 2.6 Split Virtqueues:
@@ -2586,6 +2587,7 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 		 * Size value is 32768.
 		 */
 		dev_info->rx_desc_lim.nb_max = 32768;
+		dev_info->tx_desc_lim.nb_max = 32768;
 	}
 	/*
 	 * Actual minimum is not the same for virtqueues of different kinds,
@@ -2594,7 +2596,9 @@ virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 	 */
 	dev_info->rx_desc_lim.nb_min = RTE_MAX(DEFAULT_RX_FREE_THRESH,
 					       RTE_VIRTIO_VPMD_RX_REARM_THRESH);
+	dev_info->tx_desc_lim.nb_min = DEFAULT_TX_FREE_THRESH;
 	dev_info->rx_desc_lim.nb_align = 1;
+	dev_info->tx_desc_lim.nb_align = 1;
 
 	return 0;
 }
-- 
2.30.2


^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-09-28 15:34 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2021-09-15 12:23 [dpdk-dev] [PATCH] net/virtio: report max/min/align Tx desc limits in dev info Andrew Rybchenko
2021-09-15 15:48 ` Maxime Coquelin
2021-09-28 15:34 ` Maxime Coquelin

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