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Message-Id: <20200421014932.2743607-4-jeffrey.t.kirsher@intel.com>
Date: Mon, 20 Apr 2020 18:49:31 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
netdev@...r.kernel.org, nhorman@...hat.com, sassmann@...hat.com,
Piotr Kwapulinski <piotr.kwapulinski@...el.com>,
Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
Andrew Bowers <andrewx.bowers@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 3/4] i40e: Add support for a new feature: Total Port Shutdown
From: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Currently after requesting to down a link on a physical network port,
the traffic is no longer being processed but the physical link
with a link partner is still established.
Total Port Shutdown allows to completely shutdown the port on the
link-down procedure by physically removing the link from the port.
Introduced changes:
- probe NVM if the feature was enabled at initialization of the port
- special handling on link-down procedure to let FW physically
shutdown the port if the feature was enabled
Testing Hints (required if no HSD):
Link up/down, link-down-on-close
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Signed-off-by: Piotr Kwapulinski <piotr.kwapulinski@...el.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/i40e/i40e.h | 1 +
.../net/ethernet/intel/i40e/i40e_ethtool.c | 8 ++
drivers/net/ethernet/intel/i40e/i40e_main.c | 125 +++++++++++++++---
3 files changed, 113 insertions(+), 21 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index e95b8da45e07..bd9b66ba96d8 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -567,6 +567,7 @@ struct i40e_pf {
#define I40E_FLAG_DISABLE_FW_LLDP BIT(24)
#define I40E_FLAG_RS_FEC BIT(25)
#define I40E_FLAG_BASE_R_FEC BIT(26)
+#define I40E_FLAG_TOTAL_PORT_SHUTDOWN BIT(27)
struct i40e_client_instance *cinst;
bool stat_offsets_loaded;
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index aa8026b1eb81..533dab295720 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -428,6 +428,7 @@ struct i40e_priv_flags {
static const struct i40e_priv_flags i40e_gstrings_priv_flags[] = {
/* NOTE: MFP setting cannot be changed */
I40E_PRIV_FLAG("MFP", I40E_FLAG_MFP_ENABLED, 1),
+ I40E_PRIV_FLAG("total-port-shutdown", I40E_FLAG_TOTAL_PORT_SHUTDOWN, 1),
I40E_PRIV_FLAG("LinkPolling", I40E_FLAG_LINK_POLLING_ENABLED, 0),
I40E_PRIV_FLAG("flow-director-atr", I40E_FLAG_FD_ATR_ENABLED, 0),
I40E_PRIV_FLAG("veb-stats", I40E_FLAG_VEB_STATS_ENABLED, 0),
@@ -5006,6 +5007,13 @@ static int i40e_set_priv_flags(struct net_device *dev, u32 flags)
dev_warn(&pf->pdev->dev, "Cannot change FEC config\n");
}
+ if ((changed_flags & I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED) &&
+ (orig_flags & I40E_FLAG_TOTAL_PORT_SHUTDOWN)) {
+ dev_err(&pf->pdev->dev,
+ "Setting link-down-on-close not supported on this port\n");
+ return -EOPNOTSUPP;
+ }
+
if ((changed_flags & new_flags &
I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED) &&
(new_flags & I40E_FLAG_MFP_ENABLED))
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index ff431c13f858..4c414208a22a 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -54,7 +54,7 @@ static void i40e_fdir_sb_setup(struct i40e_pf *pf);
static int i40e_veb_get_bw_info(struct i40e_veb *veb);
static int i40e_get_capabilities(struct i40e_pf *pf,
enum i40e_admin_queue_opc list_type);
-
+static bool i40e_is_total_port_shutdown_enabled(struct i40e_pf *pf);
/* i40e_pci_tbl - PCI Device ID Table
*
@@ -6672,21 +6672,6 @@ static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
clear_bit(__I40E_CONFIG_BUSY, pf->state);
}
-/**
- * i40e_up - Bring the connection back up after being down
- * @vsi: the VSI being configured
- **/
-int i40e_up(struct i40e_vsi *vsi)
-{
- int err;
-
- err = i40e_vsi_configure(vsi);
- if (!err)
- err = i40e_up_complete(vsi);
-
- return err;
-}
-
/**
* i40e_force_link_state - Force the link status
* @pf: board private structure
@@ -6697,10 +6682,12 @@ static i40e_status i40e_force_link_state(struct i40e_pf *pf, bool is_up)
struct i40e_aq_get_phy_abilities_resp abilities;
struct i40e_aq_set_phy_config config = {0};
struct i40e_hw *hw = &pf->hw;
+ bool non_zero_phy_type;
i40e_status err;
u64 mask;
u8 speed;
+ non_zero_phy_type = is_up;
/* Card might've been put in an unstable state by other drivers
* and applications, which causes incorrect speed values being
* set on startup. In order to clear speed registers, we call
@@ -6731,8 +6718,11 @@ static i40e_status i40e_force_link_state(struct i40e_pf *pf, bool is_up)
/* If link needs to go up, but was not forced to go down,
* and its speed values are OK, no need for a flap
+ * if non_zero_phy_type was set, still need to force up
*/
- if (is_up && abilities.phy_type != 0 && abilities.link_speed != 0)
+ if (pf->flags & I40E_FLAG_TOTAL_PORT_SHUTDOWN)
+ non_zero_phy_type = true;
+ else if (is_up && abilities.phy_type != 0 && abilities.link_speed != 0)
return I40E_SUCCESS;
/* To force link we need to set bits for all supported PHY types,
@@ -6740,10 +6730,18 @@ static i40e_status i40e_force_link_state(struct i40e_pf *pf, bool is_up)
* across two fields.
*/
mask = I40E_PHY_TYPES_BITMASK;
- config.phy_type = is_up ? cpu_to_le32((u32)(mask & 0xffffffff)) : 0;
- config.phy_type_ext = is_up ? (u8)((mask >> 32) & 0xff) : 0;
+ config.phy_type =
+ non_zero_phy_type ? cpu_to_le32((u32)(mask & 0xffffffff)) : 0;
+ config.phy_type_ext =
+ non_zero_phy_type ? (u8)((mask >> 32) & 0xff) : 0;
/* Copy the old settings, except of phy_type */
config.abilities = abilities.abilities;
+ if (pf->flags & I40E_FLAG_TOTAL_PORT_SHUTDOWN) {
+ if (is_up)
+ config.abilities |= I40E_AQ_PHY_ENABLE_LINK;
+ else
+ config.abilities &= ~(I40E_AQ_PHY_ENABLE_LINK);
+ }
if (abilities.link_speed != 0)
config.link_speed = abilities.link_speed;
else
@@ -6774,11 +6772,31 @@ static i40e_status i40e_force_link_state(struct i40e_pf *pf, bool is_up)
i40e_update_link_info(hw);
}
- i40e_aq_set_link_restart_an(hw, true, NULL);
+ i40e_aq_set_link_restart_an(hw, is_up, NULL);
return I40E_SUCCESS;
}
+/**
+ * i40e_up - Bring the connection back up after being down
+ * @vsi: the VSI being configured
+ **/
+int i40e_up(struct i40e_vsi *vsi)
+{
+ int err;
+
+ if (vsi->type == I40E_VSI_MAIN &&
+ (vsi->back->flags & I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED ||
+ vsi->back->flags & I40E_FLAG_TOTAL_PORT_SHUTDOWN))
+ i40e_force_link_state(vsi->back, true);
+
+ err = i40e_vsi_configure(vsi);
+ if (!err)
+ err = i40e_up_complete(vsi);
+
+ return err;
+}
+
/**
* i40e_down - Shutdown the connection processing
* @vsi: the VSI being stopped
@@ -6797,7 +6815,8 @@ void i40e_down(struct i40e_vsi *vsi)
i40e_vsi_disable_irq(vsi);
i40e_vsi_stop_rings(vsi);
if (vsi->type == I40E_VSI_MAIN &&
- vsi->back->flags & I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED)
+ (vsi->back->flags & I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED ||
+ vsi->back->flags & I40E_FLAG_TOTAL_PORT_SHUTDOWN))
i40e_force_link_state(vsi->back, false);
i40e_napi_disable_all(vsi);
@@ -11837,6 +11856,60 @@ i40e_status i40e_commit_partition_bw_setting(struct i40e_pf *pf)
return ret;
}
+/**
+ * i40e_is_total_port_shutdown_enabled - read nvm and return value
+ * if total port shutdown feature is enabled for this pf
+ * @pf: board private structure
+ **/
+static bool i40e_is_total_port_shutdown_enabled(struct i40e_pf *pf)
+{
+#define I40E_TOTAL_PORT_SHUTDOWN_ENABLED BIT(4)
+#define I40E_FEATURES_ENABLE_PTR 0x2A
+#define I40E_CURRENT_SETTING_PTR 0x2B
+#define I40E_LINK_BEHAVIOR_WORD_OFFSET 0x2D
+#define I40E_LINK_BEHAVIOR_WORD_LENGTH 0x1
+#define I40E_LINK_BEHAVIOR_OS_FORCED_ENABLED BIT(0)
+#define I40E_LINK_BEHAVIOR_PORT_BIT_LENGTH 4
+ i40e_status read_status = I40E_SUCCESS;
+ u16 sr_emp_sr_settings_ptr = 0;
+ u16 features_enable = 0;
+ u16 link_behavior = 0;
+ bool ret = false;
+
+ read_status = i40e_read_nvm_word(&pf->hw,
+ I40E_SR_EMP_SR_SETTINGS_PTR,
+ &sr_emp_sr_settings_ptr);
+ if (read_status)
+ goto err_nvm;
+ read_status = i40e_read_nvm_word(&pf->hw,
+ sr_emp_sr_settings_ptr +
+ I40E_FEATURES_ENABLE_PTR,
+ &features_enable);
+ if (read_status)
+ goto err_nvm;
+ if (I40E_TOTAL_PORT_SHUTDOWN_ENABLED & features_enable) {
+ read_status =
+ i40e_read_nvm_module_data(&pf->hw,
+ I40E_SR_EMP_SR_SETTINGS_PTR,
+ I40E_CURRENT_SETTING_PTR,
+ I40E_LINK_BEHAVIOR_WORD_OFFSET,
+ I40E_LINK_BEHAVIOR_WORD_LENGTH,
+ &link_behavior);
+ if (read_status)
+ goto err_nvm;
+ link_behavior >>=
+ (pf->hw.port * I40E_LINK_BEHAVIOR_PORT_BIT_LENGTH);
+ ret = I40E_LINK_BEHAVIOR_OS_FORCED_ENABLED & link_behavior;
+ }
+ return ret;
+
+err_nvm:
+ dev_warn(&pf->pdev->dev,
+ "Total Port Shutdown feature is off due to read nvm error:%d\n",
+ read_status);
+ return ret;
+}
+
/**
* i40e_sw_init - Initialize general software structures (struct i40e_pf)
* @pf: board private structure to initialize
@@ -12012,6 +12085,16 @@ static int i40e_sw_init(struct i40e_pf *pf)
pf->tx_timeout_recovery_level = 1;
+ if (pf->hw.mac.type != I40E_MAC_X722 &&
+ i40e_is_total_port_shutdown_enabled(pf)) {
+ /* Link down on close must be on when total port shutdown
+ * is enabled for a given port
+ */
+ pf->flags |= (I40E_FLAG_TOTAL_PORT_SHUTDOWN
+ | I40E_FLAG_LINK_DOWN_ON_CLOSE_ENABLED);
+ dev_info(&pf->pdev->dev,
+ "Total Port Shutdown is enabled, link-down-on-close forced on\n");
+ }
mutex_init(&pf->switch_mutex);
sw_init_done:
--
2.25.3
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