[PATCH net-next 0/7][pull request] 40GbE Intel Wired LAN Driver Updates 2022-02-03

[PATCH net-next 0/7][pull request] 40GbE Intel Wired LAN Driver Updates 2022-02-03

[Tony Nguyen]

This series contains updates to the i40e client header file and driver.

Mateusz disables HW TC offload by default.

Joe Damato removes a no longer used statistic.

Jakub Kicinski removes an unused enum from the client header file.

Jedrzej changes some admin queue commands to occur under atomic context
and adds new functions for admin queue MAC VLAN filters to avoid a
potential race that could occur due storing results in a structure that
could be overwritten by the next admin queue call.

The following are changes since commit 9c30918925d7992a6d812b3aa7e026839723c78a:
  Merge branch 'dsa-mv88e6xxx-phylink_generic_validate'
and are available in the git repository at:
  git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue 40GbE

Jakub Kicinski (1):
  i40e: remove enum i40e_client_state

Jedrzej Jagielski (4):
  i40e: Add sending commands in atomic context
  i40e: Add new versions of send ASQ command functions
  i40e: Add new version of i40e_aq_add_macvlan function
  i40e: Fix race condition while adding/deleting MAC/VLAN filters

Joe Damato (1):
  i40e: Remove unused RX realloc stat

Mateusz Palczewski (1):
  i40e: Disable hw-tc-offload feature on driver load

 drivers/net/ethernet/intel/i40e/i40e_adminq.c |  92 ++++++++++-
 drivers/net/ethernet/intel/i40e/i40e_common.c | 155 +++++++++++++++---
 .../net/ethernet/intel/i40e/i40e_debugfs.c    |   3 +-
 drivers/net/ethernet/intel/i40e/i40e_main.c   |  29 ++--
 .../net/ethernet/intel/i40e/i40e_prototype.h  |  25 +++
 drivers/net/ethernet/intel/i40e/i40e_txrx.h   |   1 -
 include/linux/net/intel/i40e_client.h         |  10 --
 7 files changed, 255 insertions(+), 60 deletions(-)

-- 
2.31.1

[PATCH net-next 1/7] i40e: Disable hw-tc-offload feature on driver load

[Tony Nguyen]

From: Mateusz Palczewski <mateusz.palczewski@intel.com>

After loading driver hw-tc-offload is enabled by default.
Change the behaviour of driver to disable hw-tc-offload by default as
this is the expected state. Additionally since this impacts ntuple
feature state change the way of checking NETIF_F_HW_TC flag.

Signed-off-by: Norbert Zulinski <norbertx.zulinski@intel.com>
Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index c8834765c864..748806cfc441 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -12707,7 +12707,8 @@ static int i40e_set_features(struct net_device *netdev,
 	else
 		i40e_vlan_stripping_disable(vsi);
 
-	if (!(features & NETIF_F_HW_TC) && pf->num_cloud_filters) {
+	if (!(features & NETIF_F_HW_TC) &&
+	    (netdev->features & NETIF_F_HW_TC) && pf->num_cloud_filters) {
 		dev_err(&pf->pdev->dev,
 			"Offloaded tc filters active, can't turn hw_tc_offload off");
 		return -EINVAL;
@@ -13459,6 +13460,8 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
 	netdev->features |= hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
 	netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
 
+	netdev->features &= ~NETIF_F_HW_TC;
+
 	if (vsi->type == I40E_VSI_MAIN) {
 		SET_NETDEV_DEV(netdev, &pf->pdev->dev);
 		ether_addr_copy(mac_addr, hw->mac.perm_addr);
-- 
2.31.1

[PATCH net-next 2/7] i40e: Remove unused RX realloc stat

[Tony Nguyen]

From: Joe Damato <jdamato@fastly.com>

After commit 1a557afc4dd5 ("i40e: Refactor receive routine"),
rx_stats.realloc_count is no longer being incremented, so remove it.

The debugfs string was left, but hardcoded to 0. This is intended to
prevent breaking any existing code / scripts that are parsing debugfs
for i40e.

Signed-off-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_debugfs.c | 3 +--
 drivers/net/ethernet/intel/i40e/i40e_txrx.h    | 1 -
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index 1e57cc8c47d7..90fff05fbd2b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -275,9 +275,8 @@ static void i40e_dbg_dump_vsi_seid(struct i40e_pf *pf, int seid)
 			 rx_ring->rx_stats.alloc_page_failed,
 			 rx_ring->rx_stats.alloc_buff_failed);
 		dev_info(&pf->pdev->dev,
-			 "    rx_rings[%i]: rx_stats: realloc_count = %lld, page_reuse_count = %lld\n",
+			 "    rx_rings[%i]: rx_stats: realloc_count = 0, page_reuse_count = %lld\n",
 			 i,
-			 rx_ring->rx_stats.realloc_count,
 			 rx_ring->rx_stats.page_reuse_count);
 		dev_info(&pf->pdev->dev,
 			 "    rx_rings[%i]: size = %i\n",
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
index bfc2845c99d1..88387a644cc3 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
@@ -298,7 +298,6 @@ struct i40e_rx_queue_stats {
 	u64 alloc_page_failed;
 	u64 alloc_buff_failed;
 	u64 page_reuse_count;
-	u64 realloc_count;
 };
 
 enum i40e_ring_state_t {
-- 
2.31.1

[PATCH net-next 3/7] i40e: remove enum i40e_client_state

[Tony Nguyen]

From: Jakub Kicinski <kuba@kernel.org>

It's not used.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 include/linux/net/intel/i40e_client.h | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/include/linux/net/intel/i40e_client.h b/include/linux/net/intel/i40e_client.h
index 6b3267b49755..ed42bd5f639f 100644
--- a/include/linux/net/intel/i40e_client.h
+++ b/include/linux/net/intel/i40e_client.h
@@ -26,11 +26,6 @@ struct i40e_client_version {
 	u8 rsvd;
 };
 
-enum i40e_client_state {
-	__I40E_CLIENT_NULL,
-	__I40E_CLIENT_REGISTERED
-};
-
 enum i40e_client_instance_state {
 	__I40E_CLIENT_INSTANCE_NONE,
 	__I40E_CLIENT_INSTANCE_OPENED,
@@ -190,11 +185,6 @@ struct i40e_client {
 	const struct i40e_client_ops *ops; /* client ops provided by the client */
 };
 
-static inline bool i40e_client_is_registered(struct i40e_client *client)
-{
-	return test_bit(__I40E_CLIENT_REGISTERED, &client->state);
-}
-
 void i40e_client_device_register(struct i40e_info *ldev, struct i40e_client *client);
 void i40e_client_device_unregister(struct i40e_info *ldev);
 
-- 
2.31.1

[PATCH net-next 4/7] i40e: Add sending commands in atomic context

[Tony Nguyen]

From: Jedrzej Jagielski <jedrzej.jagielski@intel.com>

Change functions:
- i40e_aq_add_macvlan
- i40e_aq_remove_macvlan
- i40e_aq_delete_element
- i40e_aq_add_vsi
- i40e_aq_update_vsi_params
to explicitly use i40e_asq_send_command_atomic(..., true)
instead of i40e_asq_send_command, as they use mutexes and do some
work in an atomic context.
Without this change setting vlan via netdev will fail with
call trace cased by bug "BUG: scheduling while atomic".

Signed-off-by: Witold Fijalkowski <witoldx.fijalkowski@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_common.c | 21 +++++++++++--------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index 9ddeb015eb7e..e830987a8c6d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -1899,8 +1899,9 @@ i40e_status i40e_aq_add_vsi(struct i40e_hw *hw,
 
 	desc.flags |= cpu_to_le16((u16)(I40E_AQ_FLAG_BUF | I40E_AQ_FLAG_RD));
 
-	status = i40e_asq_send_command(hw, &desc, &vsi_ctx->info,
-				    sizeof(vsi_ctx->info), cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, &vsi_ctx->info,
+					      sizeof(vsi_ctx->info),
+					      cmd_details, true);
 
 	if (status)
 		goto aq_add_vsi_exit;
@@ -2287,8 +2288,9 @@ i40e_status i40e_aq_update_vsi_params(struct i40e_hw *hw,
 
 	desc.flags |= cpu_to_le16((u16)(I40E_AQ_FLAG_BUF | I40E_AQ_FLAG_RD));
 
-	status = i40e_asq_send_command(hw, &desc, &vsi_ctx->info,
-				    sizeof(vsi_ctx->info), cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, &vsi_ctx->info,
+					      sizeof(vsi_ctx->info),
+					      cmd_details, true);
 
 	vsi_ctx->vsis_allocated = le16_to_cpu(resp->vsi_used);
 	vsi_ctx->vsis_unallocated = le16_to_cpu(resp->vsi_free);
@@ -2673,8 +2675,8 @@ i40e_status i40e_aq_add_macvlan(struct i40e_hw *hw, u16 seid,
 	if (buf_size > I40E_AQ_LARGE_BUF)
 		desc.flags |= cpu_to_le16((u16)I40E_AQ_FLAG_LB);
 
-	status = i40e_asq_send_command(hw, &desc, mv_list, buf_size,
-				       cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, mv_list, buf_size,
+					      cmd_details, true);
 
 	return status;
 }
@@ -2715,8 +2717,8 @@ i40e_status i40e_aq_remove_macvlan(struct i40e_hw *hw, u16 seid,
 	if (buf_size > I40E_AQ_LARGE_BUF)
 		desc.flags |= cpu_to_le16((u16)I40E_AQ_FLAG_LB);
 
-	status = i40e_asq_send_command(hw, &desc, mv_list, buf_size,
-				       cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, mv_list, buf_size,
+					      cmd_details, true);
 
 	return status;
 }
@@ -3868,7 +3870,8 @@ i40e_status i40e_aq_delete_element(struct i40e_hw *hw, u16 seid,
 
 	cmd->seid = cpu_to_le16(seid);
 
-	status = i40e_asq_send_command(hw, &desc, NULL, 0, cmd_details);
+	status = i40e_asq_send_command_atomic(hw, &desc, NULL, 0,
+					      cmd_details, true);
 
 	return status;
 }
-- 
2.31.1

[PATCH net-next 5/7] i40e: Add new versions of send ASQ command functions

[Tony Nguyen]

From: Jedrzej Jagielski <jedrzej.jagielski@intel.com>

ASQ send command functions are returning only i40e status codes
yet some calling functions also need Admin Queue status
that is stored in hw->aq.asq_last_status. Since hw object
is stored on a heap it introduces a possibility for
a race condition in access to hw if calling function is not
fast enough to read hw->aq.asq_last_status before next
send ASQ command is executed.

Add new versions of send ASQ command functions that return
Admin Queue status on the stack to avoid race conditions
in access to hw->aq.asq_last_status.
Add new _v2 version of i40e_aq_remove_macvlan that is using
new _v2 versions of ASQ send command functions and returns
the Admin Queue status on the stack.

Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_adminq.c | 92 +++++++++++++++++--
 drivers/net/ethernet/intel/i40e/i40e_common.c | 46 ++++++++++
 .../net/ethernet/intel/i40e/i40e_prototype.h  | 20 ++++
 3 files changed, 150 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_adminq.c b/drivers/net/ethernet/intel/i40e/i40e_adminq.c
index 7abef88801fb..42439f725aa4 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_adminq.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_adminq.c
@@ -769,7 +769,7 @@ static bool i40e_asq_done(struct i40e_hw *hw)
 }
 
 /**
- *  i40e_asq_send_command_atomic - send command to Admin Queue
+ *  i40e_asq_send_command_atomic_exec - send command to Admin Queue
  *  @hw: pointer to the hw struct
  *  @desc: prefilled descriptor describing the command (non DMA mem)
  *  @buff: buffer to use for indirect commands
@@ -780,11 +780,13 @@ static bool i40e_asq_done(struct i40e_hw *hw)
  *  This is the main send command driver routine for the Admin Queue send
  *  queue.  It runs the queue, cleans the queue, etc
  **/
-i40e_status
-i40e_asq_send_command_atomic(struct i40e_hw *hw, struct i40e_aq_desc *desc,
-			     void *buff, /* can be NULL */ u16  buff_size,
-			     struct i40e_asq_cmd_details *cmd_details,
-			     bool is_atomic_context)
+static i40e_status
+i40e_asq_send_command_atomic_exec(struct i40e_hw *hw,
+				  struct i40e_aq_desc *desc,
+				  void *buff, /* can be NULL */
+				  u16  buff_size,
+				  struct i40e_asq_cmd_details *cmd_details,
+				  bool is_atomic_context)
 {
 	i40e_status status = 0;
 	struct i40e_dma_mem *dma_buff = NULL;
@@ -794,8 +796,6 @@ i40e_asq_send_command_atomic(struct i40e_hw *hw, struct i40e_aq_desc *desc,
 	u16  retval = 0;
 	u32  val = 0;
 
-	mutex_lock(&hw->aq.asq_mutex);
-
 	if (hw->aq.asq.count == 0) {
 		i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
 			   "AQTX: Admin queue not initialized.\n");
@@ -969,6 +969,36 @@ i40e_asq_send_command_atomic(struct i40e_hw *hw, struct i40e_aq_desc *desc,
 	}
 
 asq_send_command_error:
+	return status;
+}
+
+/**
+ *  i40e_asq_send_command_atomic - send command to Admin Queue
+ *  @hw: pointer to the hw struct
+ *  @desc: prefilled descriptor describing the command (non DMA mem)
+ *  @buff: buffer to use for indirect commands
+ *  @buff_size: size of buffer for indirect commands
+ *  @cmd_details: pointer to command details structure
+ *  @is_atomic_context: is the function called in an atomic context?
+ *
+ *  Acquires the lock and calls the main send command execution
+ *  routine.
+ **/
+i40e_status
+i40e_asq_send_command_atomic(struct i40e_hw *hw,
+			     struct i40e_aq_desc *desc,
+			     void *buff, /* can be NULL */
+			     u16  buff_size,
+			     struct i40e_asq_cmd_details *cmd_details,
+			     bool is_atomic_context)
+{
+	i40e_status status;
+
+	mutex_lock(&hw->aq.asq_mutex);
+	status = i40e_asq_send_command_atomic_exec(hw, desc, buff, buff_size,
+						   cmd_details,
+						   is_atomic_context);
+
 	mutex_unlock(&hw->aq.asq_mutex);
 	return status;
 }
@@ -982,6 +1012,52 @@ i40e_asq_send_command(struct i40e_hw *hw, struct i40e_aq_desc *desc,
 					    cmd_details, false);
 }
 
+/**
+ *  i40e_asq_send_command_atomic_v2 - send command to Admin Queue
+ *  @hw: pointer to the hw struct
+ *  @desc: prefilled descriptor describing the command (non DMA mem)
+ *  @buff: buffer to use for indirect commands
+ *  @buff_size: size of buffer for indirect commands
+ *  @cmd_details: pointer to command details structure
+ *  @is_atomic_context: is the function called in an atomic context?
+ *  @aq_status: pointer to Admin Queue status return value
+ *
+ *  Acquires the lock and calls the main send command execution
+ *  routine. Returns the last Admin Queue status in aq_status
+ *  to avoid race conditions in access to hw->aq.asq_last_status.
+ **/
+i40e_status
+i40e_asq_send_command_atomic_v2(struct i40e_hw *hw,
+				struct i40e_aq_desc *desc,
+				void *buff, /* can be NULL */
+				u16  buff_size,
+				struct i40e_asq_cmd_details *cmd_details,
+				bool is_atomic_context,
+				enum i40e_admin_queue_err *aq_status)
+{
+	i40e_status status;
+
+	mutex_lock(&hw->aq.asq_mutex);
+	status = i40e_asq_send_command_atomic_exec(hw, desc, buff,
+						   buff_size,
+						   cmd_details,
+						   is_atomic_context);
+	if (aq_status)
+		*aq_status = hw->aq.asq_last_status;
+	mutex_unlock(&hw->aq.asq_mutex);
+	return status;
+}
+
+i40e_status
+i40e_asq_send_command_v2(struct i40e_hw *hw, struct i40e_aq_desc *desc,
+			 void *buff, /* can be NULL */ u16  buff_size,
+			 struct i40e_asq_cmd_details *cmd_details,
+			 enum i40e_admin_queue_err *aq_status)
+{
+	return i40e_asq_send_command_atomic_v2(hw, desc, buff, buff_size,
+					       cmd_details, true, aq_status);
+}
+
 /**
  *  i40e_fill_default_direct_cmd_desc - AQ descriptor helper function
  *  @desc:     pointer to the temp descriptor (non DMA mem)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index e830987a8c6d..d3e2b3005f86 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -2723,6 +2723,52 @@ i40e_status i40e_aq_remove_macvlan(struct i40e_hw *hw, u16 seid,
 	return status;
 }
 
+/**
+ * i40e_aq_remove_macvlan_v2
+ * @hw: pointer to the hw struct
+ * @seid: VSI for the mac address
+ * @mv_list: list of macvlans to be removed
+ * @count: length of the list
+ * @cmd_details: pointer to command details structure or NULL
+ * @aq_status: pointer to Admin Queue status return value
+ *
+ * Remove MAC/VLAN addresses from the HW filtering.
+ * The _v2 version returns the last Admin Queue status in aq_status
+ * to avoid race conditions in access to hw->aq.asq_last_status.
+ * It also calls _v2 versions of asq_send_command functions to
+ * get the aq_status on the stack.
+ **/
+i40e_status
+i40e_aq_remove_macvlan_v2(struct i40e_hw *hw, u16 seid,
+			  struct i40e_aqc_remove_macvlan_element_data *mv_list,
+			  u16 count, struct i40e_asq_cmd_details *cmd_details,
+			  enum i40e_admin_queue_err *aq_status)
+{
+	struct i40e_aqc_macvlan *cmd;
+	struct i40e_aq_desc desc;
+	u16 buf_size;
+
+	if (count == 0 || !mv_list || !hw)
+		return I40E_ERR_PARAM;
+
+	buf_size = count * sizeof(*mv_list);
+
+	/* prep the rest of the request */
+	i40e_fill_default_direct_cmd_desc(&desc, i40e_aqc_opc_remove_macvlan);
+	cmd = (struct i40e_aqc_macvlan *)&desc.params.raw;
+	cmd->num_addresses = cpu_to_le16(count);
+	cmd->seid[0] = cpu_to_le16(I40E_AQC_MACVLAN_CMD_SEID_VALID | seid);
+	cmd->seid[1] = 0;
+	cmd->seid[2] = 0;
+
+	desc.flags |= cpu_to_le16((u16)(I40E_AQ_FLAG_BUF | I40E_AQ_FLAG_RD));
+	if (buf_size > I40E_AQ_LARGE_BUF)
+		desc.flags |= cpu_to_le16((u16)I40E_AQ_FLAG_LB);
+
+	return i40e_asq_send_command_atomic_v2(hw, &desc, mv_list, buf_size,
+						 cmd_details, true, aq_status);
+}
+
 /**
  * i40e_mirrorrule_op - Internal helper function to add/delete mirror rule
  * @hw: pointer to the hw struct
diff --git a/drivers/net/ethernet/intel/i40e/i40e_prototype.h b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
index 9241b6005ad3..4ace56a911d9 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_prototype.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
@@ -27,10 +27,25 @@ i40e_asq_send_command(struct i40e_hw *hw, struct i40e_aq_desc *desc,
 		      void *buff, /* can be NULL */ u16  buff_size,
 		      struct i40e_asq_cmd_details *cmd_details);
 i40e_status
+i40e_asq_send_command_v2(struct i40e_hw *hw,
+			 struct i40e_aq_desc *desc,
+			 void *buff, /* can be NULL */
+			 u16  buff_size,
+			 struct i40e_asq_cmd_details *cmd_details,
+			 enum i40e_admin_queue_err *aq_status);
+i40e_status
 i40e_asq_send_command_atomic(struct i40e_hw *hw, struct i40e_aq_desc *desc,
 			     void *buff, /* can be NULL */ u16  buff_size,
 			     struct i40e_asq_cmd_details *cmd_details,
 			     bool is_atomic_context);
+i40e_status
+i40e_asq_send_command_atomic_v2(struct i40e_hw *hw,
+				struct i40e_aq_desc *desc,
+				void *buff, /* can be NULL */
+				u16  buff_size,
+				struct i40e_asq_cmd_details *cmd_details,
+				bool is_atomic_context,
+				enum i40e_admin_queue_err *aq_status);
 
 /* debug function for adminq */
 void i40e_debug_aq(struct i40e_hw *hw, enum i40e_debug_mask mask,
@@ -153,6 +168,11 @@ i40e_status i40e_aq_add_macvlan(struct i40e_hw *hw, u16 vsi_id,
 i40e_status i40e_aq_remove_macvlan(struct i40e_hw *hw, u16 vsi_id,
 			struct i40e_aqc_remove_macvlan_element_data *mv_list,
 			u16 count, struct i40e_asq_cmd_details *cmd_details);
+i40e_status
+i40e_aq_remove_macvlan_v2(struct i40e_hw *hw, u16 seid,
+			  struct i40e_aqc_remove_macvlan_element_data *mv_list,
+			  u16 count, struct i40e_asq_cmd_details *cmd_details,
+			  enum i40e_admin_queue_err *aq_status);
 i40e_status i40e_aq_add_mirrorrule(struct i40e_hw *hw, u16 sw_seid,
 			u16 rule_type, u16 dest_vsi, u16 count, __le16 *mr_list,
 			struct i40e_asq_cmd_details *cmd_details,
-- 
2.31.1

[PATCH net-next 6/7] i40e: Add new version of i40e_aq_add_macvlan function

[Tony Nguyen]

From: Jedrzej Jagielski <jedrzej.jagielski@intel.com>

ASQ send command functions are returning only i40e status codes
yet some calling functions also need Admin Queue status
that is stored in hw->aq.asq_last_status. Since hw object
is stored on a heap it introduces a possibility for
a race condition in access to hw if calling function is not
fast enough to read hw->aq.asq_last_status before next
send ASQ command is executed.

Add new _v2 version of i40e_aq_add_macvlan that is using
new _v2 versions of ASQ send command functions and returns
the Admin Queue status on the stack.

Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_common.c | 92 +++++++++++++++----
 .../net/ethernet/intel/i40e/i40e_prototype.h  |  5 +
 2 files changed, 77 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index d3e2b3005f86..6aefffd83615 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -2634,33 +2634,28 @@ i40e_status i40e_aq_get_veb_parameters(struct i40e_hw *hw,
 }
 
 /**
- * i40e_aq_add_macvlan
- * @hw: pointer to the hw struct
- * @seid: VSI for the mac address
+ * i40e_prepare_add_macvlan
  * @mv_list: list of macvlans to be added
+ * @desc: pointer to AQ descriptor structure
  * @count: length of the list
- * @cmd_details: pointer to command details structure or NULL
+ * @seid: VSI for the mac address
  *
- * Add MAC/VLAN addresses to the HW filtering
+ * Internal helper function that prepares the add macvlan request
+ * and returns the buffer size.
  **/
-i40e_status i40e_aq_add_macvlan(struct i40e_hw *hw, u16 seid,
-			struct i40e_aqc_add_macvlan_element_data *mv_list,
-			u16 count, struct i40e_asq_cmd_details *cmd_details)
+static u16
+i40e_prepare_add_macvlan(struct i40e_aqc_add_macvlan_element_data *mv_list,
+			 struct i40e_aq_desc *desc, u16 count, u16 seid)
 {
-	struct i40e_aq_desc desc;
 	struct i40e_aqc_macvlan *cmd =
-		(struct i40e_aqc_macvlan *)&desc.params.raw;
-	i40e_status status;
+		(struct i40e_aqc_macvlan *)&desc->params.raw;
 	u16 buf_size;
 	int i;
 
-	if (count == 0 || !mv_list || !hw)
-		return I40E_ERR_PARAM;
-
 	buf_size = count * sizeof(*mv_list);
 
 	/* prep the rest of the request */
-	i40e_fill_default_direct_cmd_desc(&desc, i40e_aqc_opc_add_macvlan);
+	i40e_fill_default_direct_cmd_desc(desc, i40e_aqc_opc_add_macvlan);
 	cmd->num_addresses = cpu_to_le16(count);
 	cmd->seid[0] = cpu_to_le16(I40E_AQC_MACVLAN_CMD_SEID_VALID | seid);
 	cmd->seid[1] = 0;
@@ -2671,14 +2666,71 @@ i40e_status i40e_aq_add_macvlan(struct i40e_hw *hw, u16 seid,
 			mv_list[i].flags |=
 			       cpu_to_le16(I40E_AQC_MACVLAN_ADD_USE_SHARED_MAC);
 
-	desc.flags |= cpu_to_le16((u16)(I40E_AQ_FLAG_BUF | I40E_AQ_FLAG_RD));
+	desc->flags |= cpu_to_le16((u16)(I40E_AQ_FLAG_BUF | I40E_AQ_FLAG_RD));
 	if (buf_size > I40E_AQ_LARGE_BUF)
-		desc.flags |= cpu_to_le16((u16)I40E_AQ_FLAG_LB);
+		desc->flags |= cpu_to_le16((u16)I40E_AQ_FLAG_LB);
 
-	status = i40e_asq_send_command_atomic(hw, &desc, mv_list, buf_size,
-					      cmd_details, true);
+	return buf_size;
+}
 
-	return status;
+/**
+ * i40e_aq_add_macvlan
+ * @hw: pointer to the hw struct
+ * @seid: VSI for the mac address
+ * @mv_list: list of macvlans to be added
+ * @count: length of the list
+ * @cmd_details: pointer to command details structure or NULL
+ *
+ * Add MAC/VLAN addresses to the HW filtering
+ **/
+i40e_status
+i40e_aq_add_macvlan(struct i40e_hw *hw, u16 seid,
+		    struct i40e_aqc_add_macvlan_element_data *mv_list,
+		    u16 count, struct i40e_asq_cmd_details *cmd_details)
+{
+	struct i40e_aq_desc desc;
+	u16 buf_size;
+
+	if (count == 0 || !mv_list || !hw)
+		return I40E_ERR_PARAM;
+
+	buf_size = i40e_prepare_add_macvlan(mv_list, &desc, count, seid);
+
+	return i40e_asq_send_command_atomic(hw, &desc, mv_list, buf_size,
+					    cmd_details, true);
+}
+
+/**
+ * i40e_aq_add_macvlan_v2
+ * @hw: pointer to the hw struct
+ * @seid: VSI for the mac address
+ * @mv_list: list of macvlans to be added
+ * @count: length of the list
+ * @cmd_details: pointer to command details structure or NULL
+ * @aq_status: pointer to Admin Queue status return value
+ *
+ * Add MAC/VLAN addresses to the HW filtering.
+ * The _v2 version returns the last Admin Queue status in aq_status
+ * to avoid race conditions in access to hw->aq.asq_last_status.
+ * It also calls _v2 versions of asq_send_command functions to
+ * get the aq_status on the stack.
+ **/
+i40e_status
+i40e_aq_add_macvlan_v2(struct i40e_hw *hw, u16 seid,
+		       struct i40e_aqc_add_macvlan_element_data *mv_list,
+		       u16 count, struct i40e_asq_cmd_details *cmd_details,
+		       enum i40e_admin_queue_err *aq_status)
+{
+	struct i40e_aq_desc desc;
+	u16 buf_size;
+
+	if (count == 0 || !mv_list || !hw)
+		return I40E_ERR_PARAM;
+
+	buf_size = i40e_prepare_add_macvlan(mv_list, &desc, count, seid);
+
+	return i40e_asq_send_command_atomic_v2(hw, &desc, mv_list, buf_size,
+					       cmd_details, true, aq_status);
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/i40e/i40e_prototype.h b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
index 4ace56a911d9..ebdcde6f1aeb 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_prototype.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
@@ -165,6 +165,11 @@ i40e_status i40e_aq_get_veb_parameters(struct i40e_hw *hw,
 i40e_status i40e_aq_add_macvlan(struct i40e_hw *hw, u16 vsi_id,
 			struct i40e_aqc_add_macvlan_element_data *mv_list,
 			u16 count, struct i40e_asq_cmd_details *cmd_details);
+i40e_status
+i40e_aq_add_macvlan_v2(struct i40e_hw *hw, u16 seid,
+		       struct i40e_aqc_add_macvlan_element_data *mv_list,
+		       u16 count, struct i40e_asq_cmd_details *cmd_details,
+		       enum i40e_admin_queue_err *aq_status);
 i40e_status i40e_aq_remove_macvlan(struct i40e_hw *hw, u16 vsi_id,
 			struct i40e_aqc_remove_macvlan_element_data *mv_list,
 			u16 count, struct i40e_asq_cmd_details *cmd_details);
-- 
2.31.1

[PATCH net-next 7/7] i40e: Fix race condition while adding/deleting MAC/VLAN filters

[Tony Nguyen]

From: Jedrzej Jagielski <jedrzej.jagielski@intel.com>

There was a race condition in access to hw->aq.asq_last_status
while adding and deleting  MAC/VLAN filters causing
incorrect error status to be printed as ERROR OK instead of
the correct error.

Change calls to i40e_aq_add_macvlan in i40e_aqc_add_filters
and i40e_aq_remove_macvlan in i40e_aqc_del_filters
to  _v2 versions that return Admin Queue status on the stack
to avoid race conditions in access to hw->aq.asq_last_status.

Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 24 +++++++++++----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 748806cfc441..b2c18615d6cd 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -2143,19 +2143,19 @@ void i40e_aqc_del_filters(struct i40e_vsi *vsi, const char *vsi_name,
 			  int num_del, int *retval)
 {
 	struct i40e_hw *hw = &vsi->back->hw;
+	enum i40e_admin_queue_err aq_status;
 	i40e_status aq_ret;
-	int aq_err;
 
-	aq_ret = i40e_aq_remove_macvlan(hw, vsi->seid, list, num_del, NULL);
-	aq_err = hw->aq.asq_last_status;
+	aq_ret = i40e_aq_remove_macvlan_v2(hw, vsi->seid, list, num_del, NULL,
+					   &aq_status);
 
 	/* Explicitly ignore and do not report when firmware returns ENOENT */
-	if (aq_ret && !(aq_err == I40E_AQ_RC_ENOENT)) {
+	if (aq_ret && !(aq_status == I40E_AQ_RC_ENOENT)) {
 		*retval = -EIO;
 		dev_info(&vsi->back->pdev->dev,
 			 "ignoring delete macvlan error on %s, err %s, aq_err %s\n",
 			 vsi_name, i40e_stat_str(hw, aq_ret),
-			 i40e_aq_str(hw, aq_err));
+			 i40e_aq_str(hw, aq_status));
 	}
 }
 
@@ -2178,10 +2178,10 @@ void i40e_aqc_add_filters(struct i40e_vsi *vsi, const char *vsi_name,
 			  int num_add)
 {
 	struct i40e_hw *hw = &vsi->back->hw;
-	int aq_err, fcnt;
+	enum i40e_admin_queue_err aq_status;
+	int fcnt;
 
-	i40e_aq_add_macvlan(hw, vsi->seid, list, num_add, NULL);
-	aq_err = hw->aq.asq_last_status;
+	i40e_aq_add_macvlan_v2(hw, vsi->seid, list, num_add, NULL, &aq_status);
 	fcnt = i40e_update_filter_state(num_add, list, add_head);
 
 	if (fcnt != num_add) {
@@ -2189,17 +2189,19 @@ void i40e_aqc_add_filters(struct i40e_vsi *vsi, const char *vsi_name,
 			set_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
 			dev_warn(&vsi->back->pdev->dev,
 				 "Error %s adding RX filters on %s, promiscuous mode forced on\n",
-				 i40e_aq_str(hw, aq_err), vsi_name);
+				 i40e_aq_str(hw, aq_status), vsi_name);
 		} else if (vsi->type == I40E_VSI_SRIOV ||
 			   vsi->type == I40E_VSI_VMDQ1 ||
 			   vsi->type == I40E_VSI_VMDQ2) {
 			dev_warn(&vsi->back->pdev->dev,
 				 "Error %s adding RX filters on %s, please set promiscuous on manually for %s\n",
-				 i40e_aq_str(hw, aq_err), vsi_name, vsi_name);
+				 i40e_aq_str(hw, aq_status), vsi_name,
+					     vsi_name);
 		} else {
 			dev_warn(&vsi->back->pdev->dev,
 				 "Error %s adding RX filters on %s, incorrect VSI type: %i.\n",
-				 i40e_aq_str(hw, aq_err), vsi_name, vsi->type);
+				 i40e_aq_str(hw, aq_status), vsi_name,
+					     vsi->type);
 		}
 	}
 }
-- 
2.31.1

Re: [PATCH net-next 0/7][pull request] 40GbE Intel Wired LAN Driver Updates 2022-02-03

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (master)
by Tony Nguyen <anthony.l.nguyen@intel.com>:

On Thu,  3 Feb 2022 13:51:33 -0800 you wrote:
> This series contains updates to the i40e client header file and driver.
> 
> Mateusz disables HW TC offload by default.
> 
> Joe Damato removes a no longer used statistic.
> 
> Jakub Kicinski removes an unused enum from the client header file.
> 
> [...]

Here is the summary with links:
  - [net-next,1/7] i40e: Disable hw-tc-offload feature on driver load
    https://git.kernel.org/netdev/net-next/c/647c65e14332
  - [net-next,2/7] i40e: Remove unused RX realloc stat
    https://git.kernel.org/netdev/net-next/c/79f227c4ff3e
  - [net-next,3/7] i40e: remove enum i40e_client_state
    https://git.kernel.org/netdev/net-next/c/00edb2bac29f
  - [net-next,4/7] i40e: Add sending commands in atomic context
    https://git.kernel.org/netdev/net-next/c/59b3d7350ff3
  - [net-next,5/7] i40e: Add new versions of send ASQ command functions
    https://git.kernel.org/netdev/net-next/c/74073848b0d7
  - [net-next,6/7] i40e: Add new version of i40e_aq_add_macvlan function
    https://git.kernel.org/netdev/net-next/c/b3237df9e7c8
  - [net-next,7/7] i40e: Fix race condition while adding/deleting MAC/VLAN filters
    https://git.kernel.org/netdev/net-next/c/53a9e346e159

You are awesome, thank you!
-- 
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