Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue

Jeff Kirsher says:

====================
40GbE Intel Wired LAN Driver Updates 2018-01-10

This series contains updates to i40e and i40evf only.

Alice adds the displaying of priority xon/xoff packet stats, since we
were already keeping track of them.  Based on the recent changes, bump
the driver versions.

Jake changes how the driver determines whether or not the device is
currently up to resolve the possible issue of freeing data structures
and other memory before they have been fully allocated.  Refactored
the driver to simplify the locking behavior and to consistently use
spinlocks instead of an overloaded bit lock to protect MAC and filter
lists.  Created a helper function which can convert the AdminQ link
speed definition into a virtchnl definition.

Colin Ian King cleans up a redundant variable initialization.

Alex cleans up the driver to stop clearing the pending bit array for
each vector manually, since it is prone to dropping an interrupt and
based on the hardware specs, the pending bit array will be cleared
automatically in MSI-X mode.  Cleaned up flags for promiscuous mode to
resolve an issue where enabling & disabling promiscuous mode on a VF
would leave us in a high polling rate for the adminq task.  Cleaned up
code that was prone to race issues.

Jingjing renames pipeline personalization profile (ppp) to dynamic
device personalization (ddp) because it was being confused with the
well known point to point protocol.  Also removed checks for "track_id"
being zero, since it is valid for it to be zero for profiles that do
not have any 'write' commands.

v2: cleaned up commit message for patch 12 based on feedback from Sergei
    Shtylyov and Alex Duyck
v3: dropped patch 15 from the original series while Mariusz Stachura
    works on the changes that Jakub Kicinski has suggested
====================

Signed-off-by: David S. Miller <[email protected]>

1 files changed, 93 insertions, 103 deletions

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index 7b2a4eba92e2..f92587aba3c7 100644
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -45,8 +45,8 @@ static const char i40evf_driver_string[] =
 #define DRV_KERN "-k"
 
 #define DRV_VERSION_MAJOR 3
-#define DRV_VERSION_MINOR 0
-#define DRV_VERSION_BUILD 1
+#define DRV_VERSION_MINOR 2
+#define DRV_VERSION_BUILD 2
 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
 	     __stringify(DRV_VERSION_MINOR) "." \
 	     __stringify(DRV_VERSION_BUILD) \
@@ -276,37 +276,7 @@ void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 		if (mask & BIT(i - 1)) {
 			wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 			     I40E_VFINT_DYN_CTLN1_INTENA_MASK |
-			     I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
-			     I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
-		}
-	}
-}
-
-/**
- * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
- * @adapter: board private structure
- * @mask: bitmap of vectors to trigger
- **/
-static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
-{
-	struct i40e_hw *hw = &adapter->hw;
-	int i;
-	u32 dyn_ctl;
-
-	if (mask & 1) {
-		dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
-		dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
-			   I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
-			   I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
-		wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
-	}
-	for (i = 1; i < adapter->num_msix_vectors; i++) {
-		if (mask & BIT(i)) {
-			dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
-			dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
-				   I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
-				   I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
-			wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
+			     I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK);
 		}
 	}
 }
@@ -337,15 +307,10 @@ static irqreturn_t i40evf_msix_aq(int irq, void *data)
 	struct net_device *netdev = data;
 	struct i40evf_adapter *adapter = netdev_priv(netdev);
 	struct i40e_hw *hw = &adapter->hw;
-	u32 val;
 
 	/* handle non-queue interrupts, these reads clear the registers */
-	val = rd32(hw, I40E_VFINT_ICR01);
-	val = rd32(hw, I40E_VFINT_ICR0_ENA1);
-
-	val = rd32(hw, I40E_VFINT_DYN_CTL01) |
-	      I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
-	wr32(hw, I40E_VFINT_DYN_CTL01, val);
+	rd32(hw, I40E_VFINT_ICR01);
+	rd32(hw, I40E_VFINT_ICR0_ENA1);
 
 	/* schedule work on the private workqueue */
 	schedule_work(&adapter->adminq_task);
@@ -706,7 +671,8 @@ static void i40evf_configure_rx(struct i40evf_adapter *adapter)
  * @adapter: board private structure
  * @vlan: vlan tag
  *
- * Returns ptr to the filter object or NULL
+ * Returns ptr to the filter object or NULL. Must be called while holding the
+ * mac_vlan_list_lock.
  **/
 static struct
 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
@@ -731,14 +697,8 @@ static struct
 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 {
 	struct i40evf_vlan_filter *f = NULL;
-	int count = 50;
 
-	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
-				&adapter->crit_section)) {
-		udelay(1);
-		if (--count == 0)
-			goto out;
-	}
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
 
 	f = i40evf_find_vlan(adapter, vlan);
 	if (!f) {
@@ -755,8 +715,7 @@ i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 	}
 
 clearout:
-	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
-out:
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
 	return f;
 }
 
@@ -768,21 +727,16 @@ out:
 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 {
 	struct i40evf_vlan_filter *f;
-	int count = 50;
 
-	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
-				&adapter->crit_section)) {
-		udelay(1);
-		if (--count == 0)
-			return;
-	}
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
 
 	f = i40evf_find_vlan(adapter, vlan);
 	if (f) {
 		f->remove = true;
 		adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 	}
-	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
 }
 
 /**
@@ -824,7 +778,8 @@ static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
  * @adapter: board private structure
  * @macaddr: the MAC address
  *
- * Returns ptr to the filter object or NULL
+ * Returns ptr to the filter object or NULL. Must be called while holding the
+ * mac_vlan_list_lock.
  **/
 static struct
 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
@@ -854,26 +809,17 @@ i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 				     u8 *macaddr)
 {
 	struct i40evf_mac_filter *f;
-	int count = 50;
 
 	if (!macaddr)
 		return NULL;
 
-	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
-				&adapter->crit_section)) {
-		udelay(1);
-		if (--count == 0)
-			return NULL;
-	}
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
 
 	f = i40evf_find_filter(adapter, macaddr);
 	if (!f) {
 		f = kzalloc(sizeof(*f), GFP_ATOMIC);
-		if (!f) {
-			clear_bit(__I40EVF_IN_CRITICAL_TASK,
-				  &adapter->crit_section);
-			return NULL;
-		}
+		if (!f)
+			goto clearout;
 
 		ether_addr_copy(f->macaddr, macaddr);
 
@@ -884,7 +830,8 @@ i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 		f->remove = false;
 	}
 
-	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+clearout:
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
 	return f;
 }
 
@@ -911,12 +858,16 @@ static int i40evf_set_mac(struct net_device *netdev, void *p)
 	if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 		return -EPERM;
 
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
+
 	f = i40evf_find_filter(adapter, hw->mac.addr);
 	if (f) {
 		f->remove = true;
 		adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 	}
 
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
+
 	f = i40evf_add_filter(adapter, addr->sa_data);
 	if (f) {
 		ether_addr_copy(hw->mac.addr, addr->sa_data);
@@ -937,7 +888,6 @@ static void i40evf_set_rx_mode(struct net_device *netdev)
 	struct netdev_hw_addr *uca;
 	struct netdev_hw_addr *mca;
 	struct netdev_hw_addr *ha;
-	int count = 50;
 
 	/* add addr if not already in the filter list */
 	netdev_for_each_uc_addr(uca, netdev) {
@@ -947,16 +897,8 @@ static void i40evf_set_rx_mode(struct net_device *netdev)
 		i40evf_add_filter(adapter, mca->addr);
 	}
 
-	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
-				&adapter->crit_section)) {
-		udelay(1);
-		if (--count == 0) {
-			dev_err(&adapter->pdev->dev,
-				"Failed to get lock in %s\n", __func__);
-			return;
-		}
-	}
-	/* remove filter if not in netdev list */
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
+
 	list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 		netdev_for_each_mc_addr(mca, netdev)
 			if (ether_addr_equal(mca->addr, f->macaddr))
@@ -995,7 +937,7 @@ bottom_of_search_loop:
 		 adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
 		adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
 
-	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
 }
 
 /**
@@ -1058,6 +1000,8 @@ static void i40evf_configure(struct i40evf_adapter *adapter)
 /**
  * i40evf_up_complete - Finish the last steps of bringing up a connection
  * @adapter: board private structure
+ *
+ * Expects to be called while holding the __I40EVF_IN_CRITICAL_TASK bit lock.
  **/
 static void i40evf_up_complete(struct i40evf_adapter *adapter)
 {
@@ -1075,6 +1019,8 @@ static void i40evf_up_complete(struct i40evf_adapter *adapter)
 /**
  * i40e_down - Shutdown the connection processing
  * @adapter: board private structure
+ *
+ * Expects to be called while holding the __I40EVF_IN_CRITICAL_TASK bit lock.
  **/
 void i40evf_down(struct i40evf_adapter *adapter)
 {
@@ -1084,16 +1030,14 @@ void i40evf_down(struct i40evf_adapter *adapter)
 	if (adapter->state <= __I40EVF_DOWN_PENDING)
 		return;
 
-	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
-				&adapter->crit_section))
-		usleep_range(500, 1000);
-
 	netif_carrier_off(netdev);
 	netif_tx_disable(netdev);
 	adapter->link_up = false;
 	i40evf_napi_disable_all(adapter);
 	i40evf_irq_disable(adapter);
 
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
+
 	/* remove all MAC filters */
 	list_for_each_entry(f, &adapter->mac_filter_list, list) {
 		f->remove = true;
@@ -1102,6 +1046,9 @@ void i40evf_down(struct i40evf_adapter *adapter)
 	list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 		f->remove = true;
 	}
+
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
+
 	if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
 	    adapter->state != __I40EVF_RESETTING) {
 		/* cancel any current operation */
@@ -1115,7 +1062,6 @@ void i40evf_down(struct i40evf_adapter *adapter)
 		adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
 	}
 
-	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 	mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 }
 
@@ -1770,13 +1716,6 @@ static void i40evf_watchdog_task(struct work_struct *work)
 	if (adapter->state == __I40EVF_RUNNING)
 		i40evf_request_stats(adapter);
 watchdog_done:
-	if (adapter->state == __I40EVF_RUNNING) {
-		i40evf_irq_enable_queues(adapter, ~0);
-		i40evf_fire_sw_int(adapter, 0xFF);
-	} else {
-		i40evf_fire_sw_int(adapter, 0x1);
-	}
-
 	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 restart_watchdog:
 	if (adapter->state == __I40EVF_REMOVE)
@@ -1796,7 +1735,11 @@ static void i40evf_disable_vf(struct i40evf_adapter *adapter)
 
 	adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
 
-	if (netif_running(adapter->netdev)) {
+	/* We don't use netif_running() because it may be true prior to
+	 * ndo_open() returning, so we can't assume it means all our open
+	 * tasks have finished, since we're not holding the rtnl_lock here.
+	 */
+	if (adapter->state == __I40EVF_RUNNING) {
 		set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
 		netif_carrier_off(adapter->netdev);
 		netif_tx_disable(adapter->netdev);
@@ -1808,6 +1751,8 @@ static void i40evf_disable_vf(struct i40evf_adapter *adapter)
 		i40evf_free_all_rx_resources(adapter);
 	}
 
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
+
 	/* Delete all of the filters, both MAC and VLAN. */
 	list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 		list_del(&f->list);
@@ -1819,6 +1764,8 @@ static void i40evf_disable_vf(struct i40evf_adapter *adapter)
 		kfree(fv);
 	}
 
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
+
 	i40evf_free_misc_irq(adapter);
 	i40evf_reset_interrupt_capability(adapter);
 	i40evf_free_queues(adapter);
@@ -1854,6 +1801,7 @@ static void i40evf_reset_task(struct work_struct *work)
 	struct i40evf_mac_filter *f;
 	u32 reg_val;
 	int i = 0, err;
+	bool running;
 
 	while (test_and_set_bit(__I40EVF_IN_CLIENT_TASK,
 				&adapter->crit_section))
@@ -1913,7 +1861,13 @@ static void i40evf_reset_task(struct work_struct *work)
 	}
 
 continue_reset:
-	if (netif_running(netdev)) {
+	/* We don't use netif_running() because it may be true prior to
+	 * ndo_open() returning, so we can't assume it means all our open
+	 * tasks have finished, since we're not holding the rtnl_lock here.
+	 */
+	running = (adapter->state == __I40EVF_RUNNING);
+
+	if (running) {
 		netif_carrier_off(netdev);
 		netif_tx_stop_all_queues(netdev);
 		adapter->link_up = false;
@@ -1948,6 +1902,8 @@ continue_reset:
 	adapter->aq_required |= I40EVF_FLAG_AQ_GET_CONFIG;
 	adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
+
 	/* re-add all MAC filters */
 	list_for_each_entry(f, &adapter->mac_filter_list, list) {
 		f->add = true;
@@ -1956,15 +1912,19 @@ continue_reset:
 	list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
 		vlf->add = true;
 	}
+
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
+
 	adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 	adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
-	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
-	clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
 	i40evf_misc_irq_enable(adapter);
 
 	mod_timer(&adapter->watchdog_timer, jiffies + 2);
 
-	if (netif_running(adapter->netdev)) {
+	/* We were running when the reset started, so we need to restore some
+	 * state here.
+	 */
+	if (running) {
 		/* allocate transmit descriptors */
 		err = i40evf_setup_all_tx_resources(adapter);
 		if (err)
@@ -1993,9 +1953,13 @@ continue_reset:
 		adapter->state = __I40EVF_DOWN;
 		wake_up(&adapter->down_waitqueue);
 	}
+	clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
+	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 
 	return;
 reset_err:
+	clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
+	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 	dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
 	i40evf_close(netdev);
 }
@@ -2239,8 +2203,14 @@ static int i40evf_open(struct net_device *netdev)
 		return -EIO;
 	}
 
-	if (adapter->state != __I40EVF_DOWN)
-		return -EBUSY;
+	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
+				&adapter->crit_section))
+		usleep_range(500, 1000);
+
+	if (adapter->state != __I40EVF_DOWN) {
+		err = -EBUSY;
+		goto err_unlock;
+	}
 
 	/* allocate transmit descriptors */
 	err = i40evf_setup_all_tx_resources(adapter);
@@ -2264,6 +2234,8 @@ static int i40evf_open(struct net_device *netdev)
 
 	i40evf_irq_enable(adapter, true);
 
+	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+
 	return 0;
 
 err_req_irq:
@@ -2273,6 +2245,8 @@ err_setup_rx:
 	i40evf_free_all_rx_resources(adapter);
 err_setup_tx:
 	i40evf_free_all_tx_resources(adapter);
+err_unlock:
+	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 
 	return err;
 }
@@ -2296,6 +2270,9 @@ static int i40evf_close(struct net_device *netdev)
 	if (adapter->state <= __I40EVF_DOWN_PENDING)
 		return 0;
 
+	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
+				&adapter->crit_section))
+		usleep_range(500, 1000);
 
 	set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
 	if (CLIENT_ENABLED(adapter))
@@ -2305,6 +2282,8 @@ static int i40evf_close(struct net_device *netdev)
 	adapter->state = __I40EVF_DOWN_PENDING;
 	i40evf_free_traffic_irqs(adapter);
 
+	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+
 	/* We explicitly don't free resources here because the hardware is
 	 * still active and can DMA into memory. Resources are cleared in
 	 * i40evf_virtchnl_completion() after we get confirmation from the PF
@@ -2943,6 +2922,8 @@ static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	mutex_init(&hw->aq.asq_mutex);
 	mutex_init(&hw->aq.arq_mutex);
 
+	spin_lock_init(&adapter->mac_vlan_list_lock);
+
 	INIT_LIST_HEAD(&adapter->mac_filter_list);
 	INIT_LIST_HEAD(&adapter->vlan_filter_list);
 
@@ -2985,6 +2966,10 @@ static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
 
 	netif_device_detach(netdev);
 
+	while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
+				&adapter->crit_section))
+		usleep_range(500, 1000);
+
 	if (netif_running(netdev)) {
 		rtnl_lock();
 		i40evf_down(adapter);
@@ -2993,6 +2978,8 @@ static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
 	i40evf_free_misc_irq(adapter);
 	i40evf_reset_interrupt_capability(adapter);
 
+	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+
 	retval = pci_save_state(pdev);
 	if (retval)
 		return retval;
@@ -3118,6 +3105,7 @@ static void i40evf_remove(struct pci_dev *pdev)
 	i40evf_free_all_rx_resources(adapter);
 	i40evf_free_queues(adapter);
 	kfree(adapter->vf_res);
+	spin_lock_bh(&adapter->mac_vlan_list_lock);
 	/* If we got removed before an up/down sequence, we've got a filter
 	 * hanging out there that we need to get rid of.
 	 */
@@ -3130,6 +3118,8 @@ static void i40evf_remove(struct pci_dev *pdev)
 		kfree(f);
 	}
 
+	spin_unlock_bh(&adapter->mac_vlan_list_lock);
+
 	free_netdev(netdev);
 
 	pci_disable_pcie_error_reporting(pdev);