From: Jingjing Wu <jingjing.wu@intel.com>
Date: Sun, 6 Sep 2015 07:11:24 +0000 (+0800)
Subject: i40e/base: add wait states to NVM state machine
X-Git-Tag: spdx-start~8457
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2d01a42227f5c5cc284b0be677aea0355ae89b57;p=dpdk.git

i40e/base: add wait states to NVM state machine

This adds wait states to the NVM update state machine to signify when
waiting for an update operation to finish, whether we're in the middle
of a set of Write operations, or we're now idle but waiting.

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
Tested-by: Huilong Xu <huilongx.xu@intel.com>
---

diff --git a/drivers/net/i40e/base/i40e_adminq.c b/drivers/net/i40e/base/i40e_adminq.c
index 8f0a63b72e..b28187854b 100644
--- a/drivers/net/i40e/base/i40e_adminq.c
+++ b/drivers/net/i40e/base/i40e_adminq.c
@@ -1058,6 +1058,19 @@ clean_arq_element_out:
 			i40e_release_nvm(hw);
 			hw->aq.nvm_release_on_done = false;
 		}
+
+		switch (hw->nvmupd_state) {
+		case I40E_NVMUPD_STATE_INIT_WAIT:
+			hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+			break;
+
+		case I40E_NVMUPD_STATE_WRITE_WAIT:
+			hw->nvmupd_state = I40E_NVMUPD_STATE_WRITING;
+			break;
+
+		default:
+			break;
+		}
 	}
 
 #endif
diff --git a/drivers/net/i40e/base/i40e_nvm.c b/drivers/net/i40e/base/i40e_nvm.c
index 1da81a74bb..f4ea289d9e 100644
--- a/drivers/net/i40e/base/i40e_nvm.c
+++ b/drivers/net/i40e/base/i40e_nvm.c
@@ -762,6 +762,12 @@ enum i40e_status_code i40e_nvmupd_command(struct i40e_hw *hw,
 		status = i40e_nvmupd_state_writing(hw, cmd, bytes, perrno);
 		break;
 
+	case I40E_NVMUPD_STATE_INIT_WAIT:
+	case I40E_NVMUPD_STATE_WRITE_WAIT:
+		status = I40E_ERR_NOT_READY;
+		*perrno = -EBUSY;
+		break;
+
 	default:
 		/* invalid state, should never happen */
 		i40e_debug(hw, I40E_DEBUG_NVM,
@@ -827,10 +833,12 @@ STATIC enum i40e_status_code i40e_nvmupd_state_init(struct i40e_hw *hw,
 						     hw->aq.asq_last_status);
 		} else {
 			status = i40e_nvmupd_nvm_erase(hw, cmd, perrno);
-			if (status)
+			if (status) {
 				i40e_release_nvm(hw);
-			else
+			} else {
 				hw->aq.nvm_release_on_done = true;
+				hw->nvmupd_state = I40E_NVMUPD_STATE_INIT_WAIT;
+			}
 		}
 		break;
 
@@ -841,10 +849,12 @@ STATIC enum i40e_status_code i40e_nvmupd_state_init(struct i40e_hw *hw,
 						     hw->aq.asq_last_status);
 		} else {
 			status = i40e_nvmupd_nvm_write(hw, cmd, bytes, perrno);
-			if (status)
+			if (status) {
 				i40e_release_nvm(hw);
-			else
+			} else {
 				hw->aq.nvm_release_on_done = true;
+				hw->nvmupd_state = I40E_NVMUPD_STATE_INIT_WAIT;
+			}
 		}
 		break;
 
@@ -858,7 +868,7 @@ STATIC enum i40e_status_code i40e_nvmupd_state_init(struct i40e_hw *hw,
 			if (status)
 				i40e_release_nvm(hw);
 			else
-				hw->nvmupd_state = I40E_NVMUPD_STATE_WRITING;
+				hw->nvmupd_state = I40E_NVMUPD_STATE_WRITE_WAIT;
 		}
 		break;
 
@@ -877,6 +887,7 @@ STATIC enum i40e_status_code i40e_nvmupd_state_init(struct i40e_hw *hw,
 				i40e_release_nvm(hw);
 			} else {
 				hw->aq.nvm_release_on_done = true;
+				hw->nvmupd_state = I40E_NVMUPD_STATE_INIT_WAIT;
 			}
 		}
 		break;
@@ -906,7 +917,7 @@ STATIC enum i40e_status_code i40e_nvmupd_state_reading(struct i40e_hw *hw,
 						    struct i40e_nvm_access *cmd,
 						    u8 *bytes, int *perrno)
 {
-	enum i40e_status_code status;
+	enum i40e_status_code status = I40E_SUCCESS;
 	enum i40e_nvmupd_cmd upd_cmd;
 
 	DEBUGFUNC("i40e_nvmupd_state_reading");
@@ -950,7 +961,7 @@ STATIC enum i40e_status_code i40e_nvmupd_state_writing(struct i40e_hw *hw,
 						    struct i40e_nvm_access *cmd,
 						    u8 *bytes, int *perrno)
 {
-	enum i40e_status_code status;
+	enum i40e_status_code status = I40E_SUCCESS;
 	enum i40e_nvmupd_cmd upd_cmd;
 	bool retry_attempt = false;
 
@@ -962,13 +973,22 @@ retry:
 	switch (upd_cmd) {
 	case I40E_NVMUPD_WRITE_CON:
 		status = i40e_nvmupd_nvm_write(hw, cmd, bytes, perrno);
+		if (!status)
+			hw->nvmupd_state = I40E_NVMUPD_STATE_WRITE_WAIT;
 		break;
 
 	case I40E_NVMUPD_WRITE_LCB:
 		status = i40e_nvmupd_nvm_write(hw, cmd, bytes, perrno);
-		if (!status)
+		if (status) {
+			*perrno = hw->aq.asq_last_status ?
+				   i40e_aq_rc_to_posix(status,
+						       hw->aq.asq_last_status) :
+				   -EIO;
+			hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+		} else {
 			hw->aq.nvm_release_on_done = true;
-		hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+			hw->nvmupd_state = I40E_NVMUPD_STATE_INIT_WAIT;
+		}
 		break;
 
 	case I40E_NVMUPD_CSUM_CON:
@@ -979,19 +999,23 @@ retry:
 						       hw->aq.asq_last_status) :
 				   -EIO;
 			hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+		} else {
+			hw->nvmupd_state = I40E_NVMUPD_STATE_WRITE_WAIT;
 		}
 		break;
 
 	case I40E_NVMUPD_CSUM_LCB:
 		status = i40e_update_nvm_checksum(hw);
-		if (status)
+		if (status) {
 			*perrno = hw->aq.asq_last_status ?
 				   i40e_aq_rc_to_posix(status,
 						       hw->aq.asq_last_status) :
 				   -EIO;
-		else
+			hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+		} else {
 			hw->aq.nvm_release_on_done = true;
-		hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+			hw->nvmupd_state = I40E_NVMUPD_STATE_INIT_WAIT;
+		}
 		break;
 
 	default:
diff --git a/drivers/net/i40e/base/i40e_type.h b/drivers/net/i40e/base/i40e_type.h
index b6626f1281..7bcf87c69e 100644
--- a/drivers/net/i40e/base/i40e_type.h
+++ b/drivers/net/i40e/base/i40e_type.h
@@ -368,7 +368,9 @@ enum i40e_nvmupd_cmd {
 enum i40e_nvmupd_state {
 	I40E_NVMUPD_STATE_INIT,
 	I40E_NVMUPD_STATE_READING,
-	I40E_NVMUPD_STATE_WRITING
+	I40E_NVMUPD_STATE_WRITING,
+	I40E_NVMUPD_STATE_INIT_WAIT,
+	I40E_NVMUPD_STATE_WRITE_WAIT,
 };
 
 /* nvm_access definition and its masks/shifts need to be accessible to