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Date: Thu, 3 Feb 2022 13:51:39 -0800
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net, kuba@...nel.org
Cc: Jedrzej Jagielski <jedrzej.jagielski@...el.com>,
netdev@...r.kernel.org, anthony.l.nguyen@...el.com,
sassmann@...hat.com,
Sylwester Dziedziuch <sylwesterx.dziedziuch@...el.com>,
Gurucharan G <gurucharanx.g@...el.com>
Subject: [PATCH net-next 6/7] i40e: Add new version of i40e_aq_add_macvlan function
From: Jedrzej Jagielski <jedrzej.jagielski@...el.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@...el.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
Tested-by: Gurucharan G <gurucharanx.g@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.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
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