Merge branch 'Enhance-current-features-in-ena-driver'

Sameeh Jubran says:

====================
Enhance current features in ena driver

Difference from v2:
* dropped patch "net: ena: move llq configuration from ena_probe to ena_device_init()"
* reworked patch ""net: ena: implement ena_com_get_admin_polling_mode() to drop the prototype

Difference from v1:
* reodered paches #01 and #02.
* dropped adding Rx/Tx drops to ethtool in patch #08

V1:
This patchset introduces the following:
* minor changes to RSS feature
* add total rx and tx drop counter
* add unmask_interrupt counter for ethtool statistics
* add missing implementation for ena_com_get_admin_polling_mode()
* some minor code clean-up and cosmetics
* use SHUTDOWN as reset reason when closing interface
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/amazon/ena/ena_admin_defs.h

@@ -404,6 +404,10 @@ struct ena_admin_basic_stats {
 	u32 rx_drops_low;
 
 	u32 rx_drops_high;
+
+	u32 tx_drops_low;
+
+	u32 tx_drops_high;
 };
 
 struct ena_admin_acq_get_stats_resp {
@@ -1017,6 +1021,10 @@ struct ena_admin_aenq_keep_alive_desc {
 	u32 rx_drops_low;
 
 	u32 rx_drops_high;
+
+	u32 tx_drops_low;
+
+	u32 tx_drops_high;
 };
 
 struct ena_admin_ena_mmio_req_read_less_resp {

drivers/net/ethernet/amazon/ena/ena_com.c

@@ -1067,16 +1067,10 @@ static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev)
 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
 {
 	struct ena_rss *rss = &ena_dev->rss;
-	struct ena_admin_get_feat_resp get_resp;
-	int rc;
 
-	rc = ena_com_get_feature_ex(ena_dev, &get_resp,
-				    ENA_ADMIN_RSS_HASH_FUNCTION,
-				    ena_dev->rss.hash_key_dma_addr,
-				    sizeof(ena_dev->rss.hash_key), 0);
-	if (unlikely(rc)) {
+	if (!ena_com_check_supported_feature_id(ena_dev,
+						ENA_ADMIN_RSS_HASH_FUNCTION))
 		return -EOPNOTSUPP;
-	}
 
 	rss->hash_key =
 		dma_alloc_coherent(ena_dev->dmadev, sizeof(*rss->hash_key),
@@ -2286,6 +2280,7 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
 	struct ena_admin_get_feat_resp get_resp;
 	struct ena_admin_feature_rss_flow_hash_control *hash_key =
 		rss->hash_key;
+	enum ena_admin_hash_functions old_func;
 	int rc;
 
 	/* Make sure size is a mult of DWs */
@@ -2325,26 +2320,27 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
 		return -EINVAL;
 	}
 
+	old_func = rss->hash_func;
 	rss->hash_func = func;
 	rc = ena_com_set_hash_function(ena_dev);
 
 	/* Restore the old function */
 	if (unlikely(rc))
-		ena_com_get_hash_function(ena_dev, NULL, NULL);
+		rss->hash_func = old_func;
 
 	return rc;
 }
 
 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
-			      enum ena_admin_hash_functions *func,
-			      u8 *key)
+			      enum ena_admin_hash_functions *func)
 {
 	struct ena_rss *rss = &ena_dev->rss;
 	struct ena_admin_get_feat_resp get_resp;
-	struct ena_admin_feature_rss_flow_hash_control *hash_key =
-		rss->hash_key;
 	int rc;
 
+	if (unlikely(!func))
+		return -EINVAL;
+
 	rc = ena_com_get_feature_ex(ena_dev, &get_resp,
 				    ENA_ADMIN_RSS_HASH_FUNCTION,
 				    rss->hash_key_dma_addr,
@@ -2357,9 +2353,16 @@ int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
 	if (rss->hash_func)
 		rss->hash_func--;
 
-	if (func)
 	*func = rss->hash_func;
 
+	return 0;
+}
+
+int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key)
+{
+	struct ena_admin_feature_rss_flow_hash_control *hash_key =
+		ena_dev->rss.hash_key;
+
 	if (key)
 		memcpy(key, hash_key->key, (size_t)(hash_key->keys_num) << 2);
 
@@ -2641,10 +2644,10 @@ int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
 	 * ignore this error and have indirection table support only.
 	 */
 	rc = ena_com_hash_key_allocate(ena_dev);
-	if (unlikely(rc) && rc != -EOPNOTSUPP)
-		goto err_hash_key;
-	else if (rc != -EOPNOTSUPP)
+	if (likely(!rc))
 		ena_com_hash_key_fill_default_key(ena_dev);
+	else if (rc != -EOPNOTSUPP)
+		goto err_hash_key;
 
 	rc = ena_com_hash_ctrl_init(ena_dev);
 	if (unlikely(rc))

drivers/net/ethernet/amazon/ena/ena_com.h

@@ -501,18 +501,6 @@ bool ena_com_get_admin_running_state(struct ena_com_dev *ena_dev);
  */
 void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling);
 
-/* ena_com_set_admin_polling_mode - Get the admin completion queue polling mode
- * @ena_dev: ENA communication layer struct
- *
- * Get the admin completion mode.
- * If polling mode is on, ena_com_execute_admin_command will perform a
- * polling on the admin completion queue for the commands completion,
- * otherwise it will wait on wait event.
- *
- * @return state
- */
-bool ena_com_get_ena_admin_polling_mode(struct ena_com_dev *ena_dev);
-
 /* ena_com_set_admin_auto_polling_mode - Enable autoswitch to polling mode
  * @ena_dev: ENA communication layer struct
  * @polling: Enable/Disable polling mode
@@ -695,13 +683,11 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
  */
 int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
 
-/* ena_com_get_hash_function - Retrieve the hash function and the hash key
- * from the device.
+/* ena_com_get_hash_function - Retrieve the hash function from the device.
  * @ena_dev: ENA communication layer struct
  * @func: hash function
- * @key: hash key
  *
- * Retrieve the hash function and the hash key from the device.
+ * Retrieve the hash function from the device.
  *
  * @note: If the caller called ena_com_fill_hash_function but didn't flash
  * it to the device, the new configuration will be lost.
@@ -709,9 +695,20 @@ int ena_com_set_hash_function(struct ena_com_dev *ena_dev);
  * @return: 0 on Success and negative value otherwise.
  */
 int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
-			      enum ena_admin_hash_functions *func,
-			      u8 *key);
+			      enum ena_admin_hash_functions *func);
 
+/* ena_com_get_hash_key - Retrieve the hash key
+ * @ena_dev: ENA communication layer struct
+ * @key: hash key
+ *
+ * Retrieve the hash key.
+ *
+ * @note: If the caller called ena_com_fill_hash_key but didn't flash
+ * it to the device, the new configuration will be lost.
+ *
+ * @return: 0 on Success and negative value otherwise.
+ */
+int ena_com_get_hash_key(struct ena_com_dev *ena_dev, u8 *key);
 /* ena_com_fill_hash_ctrl - Fill RSS hash control
  * @ena_dev: ENA communication layer struct.
  * @proto: The protocol to configure.

drivers/net/ethernet/amazon/ena/ena_ethtool.c

@@ -83,6 +83,7 @@ static const struct ena_stats ena_stats_tx_strings[] = {
 	ENA_STAT_TX_ENTRY(bad_req_id),
 	ENA_STAT_TX_ENTRY(llq_buffer_copy),
 	ENA_STAT_TX_ENTRY(missed_tx),
+	ENA_STAT_TX_ENTRY(unmask_interrupt),
 };
 
 static const struct ena_stats ena_stats_rx_strings[] = {
@@ -635,6 +636,32 @@ static u32 ena_get_rxfh_key_size(struct net_device *netdev)
 	return ENA_HASH_KEY_SIZE;
 }
 
+static int ena_indirection_table_set(struct ena_adapter *adapter,
+				     const u32 *indir)
+{
+	struct ena_com_dev *ena_dev = adapter->ena_dev;
+	int i, rc;
+
+	for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
+		rc = ena_com_indirect_table_fill_entry(ena_dev,
+						       i,
+						       ENA_IO_RXQ_IDX(indir[i]));
+		if (unlikely(rc)) {
+			netif_err(adapter, drv, adapter->netdev,
+				  "Cannot fill indirect table (index is too large)\n");
+			return rc;
+		}
+	}
+
+	rc = ena_com_indirect_table_set(ena_dev);
+	if (rc) {
+		netif_err(adapter, drv, adapter->netdev,
+			  "Cannot set indirect table\n");
+		return rc == -EPERM ? -EOPNOTSUPP : rc;
+	}
+	return rc;
+}
+
 static int ena_indirection_table_get(struct ena_adapter *adapter, u32 *indir)
 {
 	struct ena_com_dev *ena_dev = adapter->ena_dev;
@@ -672,17 +699,18 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
 	/* We call this function in order to check if the device
 	 * supports getting/setting the hash function.
 	 */
-	rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func, key);
+	rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func);
 	if (rc) {
-		if (rc == -EOPNOTSUPP) {
-			key = NULL;
-			hfunc = NULL;
+		if (rc == -EOPNOTSUPP)
 			rc = 0;
-		}
 
 		return rc;
 	}
 
+	rc = ena_com_get_hash_key(adapter->ena_dev, key);
+	if (rc)
+		return rc;
+
 	switch (ena_func) {
 	case ENA_ADMIN_TOEPLITZ:
 		func = ETH_RSS_HASH_TOP;
@@ -699,7 +727,7 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
 	if (hfunc)
 		*hfunc = func;
 
-	return rc;
+	return 0;
 }
 
 static int ena_set_rxfh(struct net_device *netdev, const u32 *indir,
@@ -707,28 +735,14 @@ static int ena_set_rxfh(struct net_device *netdev, const u32 *indir,
 {
 	struct ena_adapter *adapter = netdev_priv(netdev);
 	struct ena_com_dev *ena_dev = adapter->ena_dev;
-	enum ena_admin_hash_functions func;
-	int rc, i;
+	enum ena_admin_hash_functions func = 0;
+	int rc;
 
 	if (indir) {
-		for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
-			rc = ena_com_indirect_table_fill_entry(ena_dev,
-							       i,
-							       ENA_IO_RXQ_IDX(indir[i]));
-			if (unlikely(rc)) {
-				netif_err(adapter, drv, netdev,
-					  "Cannot fill indirect table (index is too large)\n");
+		rc = ena_indirection_table_set(adapter, indir);
+		if (rc)
 			return rc;
 	}
-		}
-
-		rc = ena_com_indirect_table_set(ena_dev);
-		if (rc) {
-			netif_err(adapter, drv, netdev,
-				  "Cannot set indirect table\n");
-			return rc == -EPERM ? -EOPNOTSUPP : rc;
-		}
-	}
 
 	switch (hfunc) {
 	case ETH_RSS_HASH_NO_CHANGE:
@@ -746,7 +760,7 @@ static int ena_set_rxfh(struct net_device *netdev, const u32 *indir,
 		return -EOPNOTSUPP;
 	}
 
-	if (key) {
+	if (key || func) {
 		rc = ena_com_fill_hash_function(ena_dev, func, key,
 						ENA_HASH_KEY_SIZE,
 						0xFFFFFFFF);

drivers/net/ethernet/amazon/ena/ena_netdev.c

@@ -1762,6 +1762,9 @@ static void ena_unmask_interrupt(struct ena_ring *tx_ring,
 				tx_ring->smoothed_interval,
 				true);
 
+	u64_stats_update_begin(&tx_ring->syncp);
+	tx_ring->tx_stats.unmask_interrupt++;
+	u64_stats_update_end(&tx_ring->syncp);
 	/* It is a shared MSI-X.
 	 * Tx and Rx CQ have pointer to it.
 	 * So we use one of them to reach the intr reg
@@ -3169,6 +3172,7 @@ static void ena_get_stats64(struct net_device *netdev,
 	struct ena_ring *rx_ring, *tx_ring;
 	unsigned int start;
 	u64 rx_drops;
+	u64 tx_drops;
 	int i;
 
 	if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
@@ -3203,9 +3207,11 @@ static void ena_get_stats64(struct net_device *netdev,
 	do {
 		start = u64_stats_fetch_begin_irq(&adapter->syncp);
 		rx_drops = adapter->dev_stats.rx_drops;
+		tx_drops = adapter->dev_stats.tx_drops;
 	} while (u64_stats_fetch_retry_irq(&adapter->syncp, start));
 
 	stats->rx_dropped = rx_drops;
+	stats->tx_dropped = tx_drops;
 
 	stats->multicast = 0;
 	stats->collisions = 0;
@@ -3433,6 +3439,7 @@ static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
 
 	ena_com_mmio_reg_read_request_destroy(ena_dev);
 
+	/* return reset reason to default value */
 	adapter->reset_reason = ENA_REGS_RESET_NORMAL;
 
 	clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
@@ -3991,7 +3998,7 @@ static int ena_rss_init_default(struct ena_adapter *adapter)
 		}
 	}
 
-	rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL,
+	rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_TOEPLITZ, NULL,
 					ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
 	if (unlikely(rc && (rc != -EOPNOTSUPP))) {
 		dev_err(dev, "Cannot fill hash function\n");
@@ -4356,6 +4363,7 @@ static void __ena_shutoff(struct pci_dev *pdev, bool shutdown)
 	cancel_work_sync(&adapter->reset_task);
 
 	rtnl_lock(); /* lock released inside the below if-else block */
+	adapter->reset_reason = ENA_REGS_RESET_SHUTDOWN;
 	ena_destroy_device(adapter, true);
 	if (shutdown) {
 		netif_device_detach(netdev);
@@ -4514,14 +4522,17 @@ static void ena_keep_alive_wd(void *adapter_data,
 	struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
 	struct ena_admin_aenq_keep_alive_desc *desc;
 	u64 rx_drops;
+	u64 tx_drops;
 
 	desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
 	adapter->last_keep_alive_jiffies = jiffies;
 
 	rx_drops = ((u64)desc->rx_drops_high << 32) | desc->rx_drops_low;
+	tx_drops = ((u64)desc->tx_drops_high << 32) | desc->tx_drops_low;
 
 	u64_stats_update_begin(&adapter->syncp);
 	adapter->dev_stats.rx_drops = rx_drops;
+	adapter->dev_stats.tx_drops = tx_drops;
 	u64_stats_update_end(&adapter->syncp);
 }
 

drivers/net/ethernet/amazon/ena/ena_netdev.h

@@ -248,6 +248,7 @@ struct ena_stats_tx {
 	u64 bad_req_id;
 	u64 llq_buffer_copy;
 	u64 missed_tx;
+	u64 unmask_interrupt;
 };
 
 struct ena_stats_rx {
@@ -333,6 +334,7 @@ struct ena_stats_dev {
 	u64 interface_down;
 	u64 admin_q_pause;
 	u64 rx_drops;
+	u64 tx_drops;
 };
 
 enum ena_flags_t {