If driver doesn't support ring parameter or tcp-data-split configuration
is not sufficient, the devmem should not be set up.
Before setup the devmem, tcp-data-split should be ON and hds-thresh
value should be 0.
Tested-by: Stanislav Fomichev <sdf@xxxxxxxxxxx>
Reviewed-by: Mina Almasry <almasrymina@xxxxxxxxxx>
Signed-off-by: Taehee Yoo <ap420073@xxxxxxxxx>
---
v7:
- Use dev->ethtool->hds members instead of calling ->get_ring_param().
v6:
- No changes.
v5:
- Add Review tag from Mina.
v4:
- Check condition before __netif_get_rx_queue().
- Separate condition check.
- Add Test tag from Stanislav.
v3:
- Patch added.
net/core/devmem.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/net/core/devmem.c b/net/core/devmem.c
index 0b6ed7525b22..c971b8aceac8 100644
--- a/net/core/devmem.c
+++ b/net/core/devmem.c
@@ -8,6 +8,7 @@
*/
#include <linux/dma-buf.h>
+#include <linux/ethtool_netlink.h>
#include <linux/genalloc.h>
#include <linux/mm.h>
#include <linux/netdevice.h>
@@ -140,6 +141,16 @@ int net_devmem_bind_dmabuf_to_queue(struct net_device *dev, u32 rxq_idx,
return -ERANGE;
}
+ if (dev->ethtool->hds_config != ETHTOOL_TCP_DATA_SPLIT_ENABLED) {
+ NL_SET_ERR_MSG(extack, "tcp-data-split is disabled");
+ return -EINVAL;
+ }
+
+ if (dev->ethtool->hds_thresh) {
+ NL_SET_ERR_MSG(extack, "hds-thresh is not zero");
+ return -EINVAL;
+ }
+
rxq = __netif_get_rx_queue(dev, rxq_idx);
if (rxq->mp_params.mp_priv) {
NL_SET_ERR_MSG(extack, "designated queue already memory provider bound");
--
2.34.1
