[dpdk-dev] [PATCH 03/17] ixgbe/base: do not wait for signature rule addition

[Wenzhuo Lu]

Waiting for FDIRCMD completion is an expensive thing to do in the
transmit hot path. This wait was added to catch problems with perfect
filter rules, and, at least in the Linux driver, there is no error
check anyway, so there is no point to adding the delay. So do not wait
for completion. Change the return of the function to void, since it has
no meaningful return value.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
---
 drivers/net/ixgbe/base/ixgbe_82599.c | 19 ++++++-------------
 drivers/net/ixgbe/base/ixgbe_api.h   |  8 ++++----
 2 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ixgbe/base/ixgbe_82599.c b/drivers/net/ixgbe/base/ixgbe_82599.c
index f0deb59..cc65919 100644
--- a/drivers/net/ixgbe/base/ixgbe_82599.c
+++ b/drivers/net/ixgbe/base/ixgbe_82599.c
@@ -1491,16 +1491,15 @@ u32 ixgbe_atr_compute_sig_hash_82599(union ixgbe_atr_hash_dword input,
  * Note that the tunnel bit in input must not be set when the hardware
  * tunneling support does not exist.
  **/
-s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
-					  union ixgbe_atr_hash_dword input,
-					  union ixgbe_atr_hash_dword common,
-					  u8 queue)
+void ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
+					   union ixgbe_atr_hash_dword input,
+					   union ixgbe_atr_hash_dword common,
+					   u8 queue)
 {
 	u64 fdirhashcmd;
 	u8 flow_type;
 	bool tunnel;
 	u32 fdircmd;
-	s32 err;
 
 	DEBUGFUNC("ixgbe_fdir_add_signature_filter_82599");
 
@@ -1522,7 +1521,7 @@ s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
 		break;
 	default:
 		DEBUGOUT(" Error on flow type input\n");
-		return IXGBE_ERR_CONFIG;
+		return;
 	}
 
 	/* configure FDIRCMD register */
@@ -1541,15 +1540,9 @@ s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
 	fdirhashcmd |= ixgbe_atr_compute_sig_hash_82599(input, common);
 	IXGBE_WRITE_REG64(hw, IXGBE_FDIRHASH, fdirhashcmd);
 
-	err = ixgbe_fdir_check_cmd_complete(hw, &fdircmd);
-	if (err) {
-		DEBUGOUT("Flow Director command did not complete!\n");
-		return err;
-	}
-
 	DEBUGOUT2("Tx Queue=%x hash=%x\n", queue, (u32)fdirhashcmd);
 
-	return IXGBE_SUCCESS;
+	return;
 }
 
 #define IXGBE_COMPUTE_BKT_HASH_ITERATION(_n) \
diff --git a/drivers/net/ixgbe/base/ixgbe_api.h b/drivers/net/ixgbe/base/ixgbe_api.h
index bd1208e..c751132 100644
--- a/drivers/net/ixgbe/base/ixgbe_api.h
+++ b/drivers/net/ixgbe/base/ixgbe_api.h
@@ -149,10 +149,10 @@ s32 ixgbe_reinit_fdir_tables_82599(struct ixgbe_hw *hw);
 s32 ixgbe_init_fdir_signature_82599(struct ixgbe_hw *hw, u32 fdirctrl);
 s32 ixgbe_init_fdir_perfect_82599(struct ixgbe_hw *hw, u32 fdirctrl,
 					bool cloud_mode);
-s32 ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
-					  union ixgbe_atr_hash_dword input,
-					  union ixgbe_atr_hash_dword common,
-					  u8 queue);
+void ixgbe_fdir_add_signature_filter_82599(struct ixgbe_hw *hw,
+					   union ixgbe_atr_hash_dword input,
+					   union ixgbe_atr_hash_dword common,
+					   u8 queue);
 s32 ixgbe_fdir_set_input_mask_82599(struct ixgbe_hw *hw,
 				    union ixgbe_atr_input *input_mask, bool cloud_mode);
 s32 ixgbe_fdir_write_perfect_filter_82599(struct ixgbe_hw *hw,
-- 
1.9.3