[dpdk-stable] patch 'net/i40e/base: fix NVM lock' has been queued to LTS release 16.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to LTS release 16.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/28/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From 4617d3b2e596c63c3636a70b55b0e9897b52025d Mon Sep 17 00:00:00 2001
From: Qi Zhang <qi.z.zhang at intel.com>
Date: Tue, 9 Jan 2018 15:30:09 -0500
Subject: [PATCH] net/i40e/base: fix NVM lock

[ upstream commit 4b3b515901b927985e04d4d96a2a804f18e04a16 ]

NVM lock is only required at below situation:
1. its X722 device or
2. API version >= 1.5
or may have issue at firmware downgrade.

Fixes: c5846a125b26 ("net/i40e/base: fix NVM access interfering")

Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
Acked-by: Beilei Xing <beilei.xing at intel.com>
---
 drivers/net/i40e/base/i40e_adminq.c | 6 ++++++
 drivers/net/i40e/base/i40e_common.c | 3 ++-
 drivers/net/i40e/base/i40e_nvm.c    | 3 ++-
 drivers/net/i40e/base/i40e_type.h   | 1 +
 4 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/base/i40e_adminq.c b/drivers/net/i40e/base/i40e_adminq.c
index 0d3a83fa4..15cbd8955 100644
--- a/drivers/net/i40e/base/i40e_adminq.c
+++ b/drivers/net/i40e/base/i40e_adminq.c
@@ -682,6 +682,12 @@ enum i40e_status_code i40e_init_adminq(struct i40e_hw *hw)
 			   &oem_lo);
 	hw->nvm.oem_ver = ((u32)oem_hi << 16) | oem_lo;
 
+	/* Newer versions of firmware require lock when reading the NVM */
+	if ((hw->aq.api_maj_ver > 1) ||
+	    ((hw->aq.api_maj_ver == 1) &&
+	     (hw->aq.api_min_ver >= 5)))
+		hw->flags |= I40E_HW_FLAG_NVM_READ_REQUIRES_LOCK;
+
 	if (hw->aq.api_maj_ver > I40E_FW_API_VERSION_MAJOR) {
 		ret_code = I40E_ERR_FIRMWARE_API_VERSION;
 		goto init_adminq_free_arq;
diff --git a/drivers/net/i40e/base/i40e_common.c b/drivers/net/i40e/base/i40e_common.c
index 9a6b3ed61..76f262116 100644
--- a/drivers/net/i40e/base/i40e_common.c
+++ b/drivers/net/i40e/base/i40e_common.c
@@ -1046,7 +1046,8 @@ enum i40e_status_code i40e_init_shared_code(struct i40e_hw *hw)
 
 #ifdef X722_SUPPORT
 	if (hw->mac.type == I40E_MAC_X722)
-		hw->flags |= I40E_HW_FLAG_AQ_SRCTL_ACCESS_ENABLE;
+		hw->flags |= I40E_HW_FLAG_AQ_SRCTL_ACCESS_ENABLE |
+			     I40E_HW_FLAG_NVM_READ_REQUIRES_LOCK;
 
 #endif
 	status = i40e_init_nvm(hw);
diff --git a/drivers/net/i40e/base/i40e_nvm.c b/drivers/net/i40e/base/i40e_nvm.c
index 4fa1220b2..4976b1ffc 100644
--- a/drivers/net/i40e/base/i40e_nvm.c
+++ b/drivers/net/i40e/base/i40e_nvm.c
@@ -221,7 +221,8 @@ enum i40e_status_code i40e_read_nvm_word(struct i40e_hw *hw, u16 offset,
 
 #ifdef X722_SUPPORT
 	if (hw->flags & I40E_HW_FLAG_AQ_SRCTL_ACCESS_ENABLE) {
-		ret_code = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
+		if (hw->flags & I40E_HW_FLAG_NVM_READ_REQUIRES_LOCK)
+			ret_code = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
 		if (!ret_code) {
 			ret_code = i40e_read_nvm_word_aq(hw, offset, data);
 			i40e_release_nvm(hw);
diff --git a/drivers/net/i40e/base/i40e_type.h b/drivers/net/i40e/base/i40e_type.h
index b5f72c32d..d514abe34 100644
--- a/drivers/net/i40e/base/i40e_type.h
+++ b/drivers/net/i40e/base/i40e_type.h
@@ -685,6 +685,7 @@ struct i40e_hw {
 
 #endif
 #define I40E_HW_FLAG_AQ_SRCTL_ACCESS_ENABLE BIT_ULL(0)
+#define I40E_HW_FLAG_NVM_READ_REQUIRES_LOCK BIT_ULL(3)
 	u64 flags;
 
 	/* debug mask */
-- 
2.14.2