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[net-next,v3,10/10] sfc: implement ethtool get/set RX ring size for EF100 reps

Message ID 294be9ed0dd09b800f764a7801ae929169009def.1659034549.git.ecree.xilinx@gmail.com (mailing list archive)
State Accepted
Commit 7267aa6d99f5b82f6d0e4f537d87fa9b6ab86411
Delegated to: Netdev Maintainers
Headers show
Series sfc: VF representors for EF100 - RX side | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 2 maintainers not CCed: edumazet@google.com habetsm.xilinx@gmail.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch warning WARNING: line length of 86 exceeds 80 columns WARNING: line length of 87 exceeds 80 columns
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

ecree@xilinx.com July 28, 2022, 6:57 p.m. UTC 
From: Edward Cree <ecree.xilinx@gmail.com>

It's not truly a ring, but the maximum length of the list of queued RX
 SKBs is analogous to an RX ring size, so use that API to configure it.

Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
---
 drivers/net/ethernet/sfc/ef100_rep.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
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Patch

diff --git a/drivers/net/ethernet/sfc/ef100_rep.c b/drivers/net/ethernet/sfc/ef100_rep.c
index eac932710c63..73ae4656a6e7 100644
--- a/drivers/net/ethernet/sfc/ef100_rep.c
+++ b/drivers/net/ethernet/sfc/ef100_rep.c
@@ -150,10 +150,37 @@  static void efx_ef100_rep_ethtool_set_msglevel(struct net_device *net_dev,
 	efv->msg_enable = msg_enable;
 }
 
+static void efx_ef100_rep_ethtool_get_ringparam(struct net_device *net_dev,
+						struct ethtool_ringparam *ring,
+						struct kernel_ethtool_ringparam *kring,
+						struct netlink_ext_ack *ext_ack)
+{
+	struct efx_rep *efv = netdev_priv(net_dev);
+
+	ring->rx_max_pending = U32_MAX;
+	ring->rx_pending = efv->rx_pring_size;
+}
+
+static int efx_ef100_rep_ethtool_set_ringparam(struct net_device *net_dev,
+					       struct ethtool_ringparam *ring,
+					       struct kernel_ethtool_ringparam *kring,
+					       struct netlink_ext_ack *ext_ack)
+{
+	struct efx_rep *efv = netdev_priv(net_dev);
+
+	if (ring->rx_mini_pending || ring->rx_jumbo_pending || ring->tx_pending)
+		return -EINVAL;
+
+	efv->rx_pring_size = ring->rx_pending;
+	return 0;
+}
+
 static const struct ethtool_ops efx_ef100_rep_ethtool_ops = {
 	.get_drvinfo		= efx_ef100_rep_get_drvinfo,
 	.get_msglevel		= efx_ef100_rep_ethtool_get_msglevel,
 	.set_msglevel		= efx_ef100_rep_ethtool_set_msglevel,
+	.get_ringparam		= efx_ef100_rep_ethtool_get_ringparam,
+	.set_ringparam		= efx_ef100_rep_ethtool_set_ringparam,
 };
 
 static struct efx_rep *efx_ef100_rep_create_netdev(struct efx_nic *efx,