diff mbox series

[v17,03/10] ethdev: add validation to offloads set by PMD

Message ID 20191111131914.16559-4-pbhagavatula@marvell.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers show
Series ethdev: add new Rx offload flags | expand

Checks

Context Check Description
ci/checkpatch warning coding style issues

Commit Message

Pavan Nikhilesh Bhagavatula Nov. 11, 2019, 1:19 p.m. UTC
From: Pavan Nikhilesh <pbhagavatula@marvell.com>

Some PMDs cannot work when certain offloads are enable/disabled, as a
workaround PMDs auto enable/disable offloads internally and expose it
through dev->data->dev_conf.rxmode.offloads.

After device specific dev_configure is called compare the requested
offloads to the offloads exposed by the PMD and, if the PMD failed
to enable a given offload then log it and return -EINVAL from
rte_eth_dev_configure, else if the PMD failed to disable a given offload
log and continue with rte_eth_dev_configure.

Suggested-by: Andrew Rybchenko <arybchenko@solarflare.com>
Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
 lib/librte_ethdev/rte_ethdev.c | 83 +++++++++++++++++++++++++++++++---
 1 file changed, 76 insertions(+), 7 deletions(-)

Comments

Ferruh Yigit Nov. 13, 2019, 6:10 p.m. UTC | #1
On 11/11/2019 1:19 PM, pbhagavatula@marvell.com wrote:
> +static int
> +validate_offloads(uint16_t port_id, uint64_t req_offloads,
> +		  uint64_t set_offloads, const char *offload_type,
> +		  const char *(*offload_name)(uint64_t))
> +{
> +	uint64_t offloads_diff = req_offloads ^ set_offloads;
> +	uint64_t offload;
> +	int ret = 0;
> +
> +	while (offloads_diff != 0) {
> +		/* Check if any offload is requested but not enabled. */
> +		offload = 1ULL << __builtin_ctzll(offloads_diff);
> +		if (offload & req_offloads) {
> +			RTE_ETHDEV_LOG(ERR,
> +				"Port %u failed to enable %s offload %s\n",
> +				port_id, offload_type, offload_name(offload));
> +			ret = -EINVAL;
> +		}
> +
> +		/* Chech if offload couldn't be disabled. */
> +		if (offload & set_offloads) {
> +			RTE_ETHDEV_LOG(INFO,
> +				"Port %u failed to disable %s offload %s\n",
> +				port_id, offload_type, offload_name(offload));

Since many PMDs now doesn't support to disable RSS_HASH config, keep getting
this log, and the message saying 'failed' confusing people.

My initial comment was to add the log in the PMDs and as "disabling not
supported ...", but since this is in the ethdev, we can we really say if
disabling not supported or failed? Can we figure out a less confusing message?

And second, to not keep getting this message, what do you think reducing the log
level to DEBUG?
diff mbox series

Patch

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 153d50e9a..bebd52231 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -1137,6 +1137,57 @@  rte_eth_dev_tx_offload_name(uint64_t offload)
 	return name;
 }
 
+/*
+ * Validate offloads that are requested through rte_eth_dev_configure against
+ * the offloads successfuly set by the ethernet device.
+ *
+ * @param port_id
+ *   The port identifier of the Ethernet device.
+ * @param req_offloads
+ *   The offloads that have been requested through `rte_eth_dev_configure`.
+ * @param set_offloads
+ *   The offloads successfuly set by the ethernet device.
+ * @param offload_type
+ *   The offload type i.e. Rx/Tx string.
+ * @param offload_name
+ *   The function that prints the offload name.
+ * @return
+ *   - (0) if validation successful.
+ *   - (-EINVAL) if requested offload has been silently disabled.
+ *
+ */
+static int
+validate_offloads(uint16_t port_id, uint64_t req_offloads,
+		  uint64_t set_offloads, const char *offload_type,
+		  const char *(*offload_name)(uint64_t))
+{
+	uint64_t offloads_diff = req_offloads ^ set_offloads;
+	uint64_t offload;
+	int ret = 0;
+
+	while (offloads_diff != 0) {
+		/* Check if any offload is requested but not enabled. */
+		offload = 1ULL << __builtin_ctzll(offloads_diff);
+		if (offload & req_offloads) {
+			RTE_ETHDEV_LOG(ERR,
+				"Port %u failed to enable %s offload %s\n",
+				port_id, offload_type, offload_name(offload));
+			ret = -EINVAL;
+		}
+
+		/* Chech if offload couldn't be disabled. */
+		if (offload & set_offloads) {
+			RTE_ETHDEV_LOG(INFO,
+				"Port %u failed to disable %s offload %s\n",
+				port_id, offload_type, offload_name(offload));
+		}
+
+		offloads_diff &= ~offload;
+	}
+
+	return ret;
+}
+
 int
 rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 		      const struct rte_eth_conf *dev_conf)
@@ -1343,10 +1394,8 @@  rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 	if (diag != 0) {
 		RTE_ETHDEV_LOG(ERR, "Port%u dev_configure = %d\n",
 			port_id, diag);
-		rte_eth_dev_rx_queue_config(dev, 0);
-		rte_eth_dev_tx_queue_config(dev, 0);
 		ret = eth_err(port_id, diag);
-		goto rollback;
+		goto reset_queues;
 	}
 
 	/* Initialize Rx profiling if enabled at compilation time. */
@@ -1354,14 +1403,34 @@  rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 	if (diag != 0) {
 		RTE_ETHDEV_LOG(ERR, "Port%u __rte_eth_dev_profile_init = %d\n",
 			port_id, diag);
-		rte_eth_dev_rx_queue_config(dev, 0);
-		rte_eth_dev_tx_queue_config(dev, 0);
 		ret = eth_err(port_id, diag);
-		goto rollback;
+		goto reset_queues;
 	}
 
-	return 0;
+	/* Validate Rx offloads. */
+	diag = validate_offloads(port_id,
+			dev_conf->rxmode.offloads,
+			dev->data->dev_conf.rxmode.offloads, "Rx",
+			rte_eth_dev_rx_offload_name);
+	if (diag != 0) {
+		ret = diag;
+		goto reset_queues;
+	}
+
+	/* Validate Tx offloads. */
+	diag = validate_offloads(port_id,
+			dev_conf->txmode.offloads,
+			dev->data->dev_conf.txmode.offloads, "Tx",
+			rte_eth_dev_tx_offload_name);
+	if (diag != 0) {
+		ret = diag;
+		goto reset_queues;
+	}
 
+	return 0;
+reset_queues:
+	rte_eth_dev_rx_queue_config(dev, 0);
+	rte_eth_dev_tx_queue_config(dev, 0);
 rollback:
 	memcpy(&dev->data->dev_conf, &orig_conf, sizeof(dev->data->dev_conf));