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Diffstat (limited to 'net/ethtool/coalesce.c')
-rw-r--r--net/ethtool/coalesce.c54
1 files changed, 43 insertions, 11 deletions
diff --git a/net/ethtool/coalesce.c b/net/ethtool/coalesce.c
index 443e7e642c96..01a59ce211c8 100644
--- a/net/ethtool/coalesce.c
+++ b/net/ethtool/coalesce.c
@@ -254,13 +254,14 @@ ethnl_set_coalesce_validate(struct ethnl_req_info *req_info,
}
static int
-ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info)
+__ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info,
+ bool *dual_change)
{
struct kernel_ethtool_coalesce kernel_coalesce = {};
struct net_device *dev = req_info->dev;
struct ethtool_coalesce coalesce = {};
+ bool mod_mode = false, mod = false;
struct nlattr **tb = info->attrs;
- bool mod = false;
int ret;
ret = dev->ethtool_ops->get_coalesce(dev, &coalesce, &kernel_coalesce,
@@ -268,6 +269,7 @@ ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info)
if (ret < 0)
return ret;
+ /* Update values */
ethnl_update_u32(&coalesce.rx_coalesce_usecs,
tb[ETHTOOL_A_COALESCE_RX_USECS], &mod);
ethnl_update_u32(&coalesce.rx_max_coalesced_frames,
@@ -286,10 +288,6 @@ ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info)
tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_IRQ], &mod);
ethnl_update_u32(&coalesce.stats_block_coalesce_usecs,
tb[ETHTOOL_A_COALESCE_STATS_BLOCK_USECS], &mod);
- ethnl_update_bool32(&coalesce.use_adaptive_rx_coalesce,
- tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX], &mod);
- ethnl_update_bool32(&coalesce.use_adaptive_tx_coalesce,
- tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX], &mod);
ethnl_update_u32(&coalesce.pkt_rate_low,
tb[ETHTOOL_A_COALESCE_PKT_RATE_LOW], &mod);
ethnl_update_u32(&coalesce.rx_coalesce_usecs_low,
@@ -312,17 +310,25 @@ ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info)
tb[ETHTOOL_A_COALESCE_TX_MAX_FRAMES_HIGH], &mod);
ethnl_update_u32(&coalesce.rate_sample_interval,
tb[ETHTOOL_A_COALESCE_RATE_SAMPLE_INTERVAL], &mod);
- ethnl_update_u8(&kernel_coalesce.use_cqe_mode_tx,
- tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX], &mod);
- ethnl_update_u8(&kernel_coalesce.use_cqe_mode_rx,
- tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX], &mod);
ethnl_update_u32(&kernel_coalesce.tx_aggr_max_bytes,
tb[ETHTOOL_A_COALESCE_TX_AGGR_MAX_BYTES], &mod);
ethnl_update_u32(&kernel_coalesce.tx_aggr_max_frames,
tb[ETHTOOL_A_COALESCE_TX_AGGR_MAX_FRAMES], &mod);
ethnl_update_u32(&kernel_coalesce.tx_aggr_time_usecs,
tb[ETHTOOL_A_COALESCE_TX_AGGR_TIME_USECS], &mod);
- if (!mod)
+
+ /* Update operation modes */
+ ethnl_update_bool32(&coalesce.use_adaptive_rx_coalesce,
+ tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_RX], &mod_mode);
+ ethnl_update_bool32(&coalesce.use_adaptive_tx_coalesce,
+ tb[ETHTOOL_A_COALESCE_USE_ADAPTIVE_TX], &mod_mode);
+ ethnl_update_u8(&kernel_coalesce.use_cqe_mode_tx,
+ tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_TX], &mod_mode);
+ ethnl_update_u8(&kernel_coalesce.use_cqe_mode_rx,
+ tb[ETHTOOL_A_COALESCE_USE_CQE_MODE_RX], &mod_mode);
+
+ *dual_change = mod && mod_mode;
+ if (!mod && !mod_mode)
return 0;
ret = dev->ethtool_ops->set_coalesce(dev, &coalesce, &kernel_coalesce,
@@ -330,6 +336,32 @@ ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info)
return ret < 0 ? ret : 1;
}
+static int
+ethnl_set_coalesce(struct ethnl_req_info *req_info, struct genl_info *info)
+{
+ bool dual_change;
+ int err, ret;
+
+ /* SET_COALESCE may change operation mode and parameters in one call.
+ * Changing operation mode may cause the driver to reset the parameter
+ * values, and therefore ignore user input (driver does not know which
+ * parameters come from user and which are echoed back from ->get).
+ * To not complicate the drivers if user tries to change both the mode
+ * and parameters at once - call the driver twice.
+ */
+ err = __ethnl_set_coalesce(req_info, info, &dual_change);
+ if (err < 0)
+ return err;
+ ret = err;
+
+ if (ret && dual_change) {
+ err = __ethnl_set_coalesce(req_info, info, &dual_change);
+ if (err < 0)
+ return err;
+ }
+ return ret;
+}
+
const struct ethnl_request_ops ethnl_coalesce_request_ops = {
.request_cmd = ETHTOOL_MSG_COALESCE_GET,
.reply_cmd = ETHTOOL_MSG_COALESCE_GET_REPLY,