Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/gi…

…t/jkirsher/next-queue

Jeff Kirsher says:

====================
100GbE Intel Wired LAN Driver Updates 2019-03-26

This series contains more updates to the ice driver only.

Jeremiah provides his first patch to the Linux kernel to clean up
un-necessary newlines in driver log messages.

Mitch updates the ice driver to use existing status codes in the iavf
driver so that when errors occur, it will not report nonsensical
results.  Adds support for VF admin queue interrupts by programming the
VPINT_MBX_CTL register array.

Brett adds a check for a bit that we set while preparing for a reset, to
ensure we are prepared to do a proper reset.  Also implemented PCI error
handling operations.  Went through and audited the hot path with pahole
and made modifications based on the results since 2 structures were
taking up more space than necessary due to cache alignment issues.
Fixed an issue where when flow control was disabled, the state of flow
control was being displayed as "Unknown".

Anirudh fixes adaptive interrupt moderation changes by adding code that
was missed, that should have been added in the initial patch to add that
support.  Cleaned up a function prototype that was never implemented.
Did additional code cleanup by removing unneeded braces and redundant
code comments.

Akeem fixes an issue that occurs when the VF is attempting to remove the
default LAN/MAC address, which is programmed by the administrator by
updating the error message to explicitly say that the VF cannot change
the MAC programmed by the PF.

Preethi fixes the driver to not fall into the error path when a added
filter already exists, but instead continue to process the rest of the
function and add appropriate checks after adding MAC filters.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/intel/ice/ice.h

@@ -294,19 +294,25 @@ struct ice_vsi {
 /* struct that defines an interrupt vector */
 struct ice_q_vector {
 	struct ice_vsi *vsi;
-	cpumask_t affinity_mask;
-	struct napi_struct napi;
-	struct ice_ring_container rx;
-	struct ice_ring_container tx;
-	struct irq_affinity_notify affinity_notify;
+
 	u16 v_idx;			/* index in the vsi->q_vector array. */
-	u8 num_ring_tx;			/* total number of Tx rings in vector */
 	u8 num_ring_rx;			/* total number of Rx rings in vector */
-	char name[ICE_INT_NAME_STR_LEN];
+	u8 num_ring_tx;			/* total number of Tx rings in vector */
+	u8 itr_countdown;		/* when 0 should adjust adaptive ITR */
 	/* in usecs, need to use ice_intrl_to_usecs_reg() before writing this
 	 * value to the device
 	 */
 	u8 intrl;
+
+	struct napi_struct napi;
+
+	struct ice_ring_container rx;
+	struct ice_ring_container tx;
+
+	cpumask_t affinity_mask;
+	struct irq_affinity_notify affinity_notify;
+
+	char name[ICE_INT_NAME_STR_LEN];
 } ____cacheline_internodealigned_in_smp;
 
 enum ice_pf_flags {

drivers/net/ethernet/intel/ice/ice_hw_autogen.h

@@ -178,6 +178,8 @@
 #define VPINT_ALLOC_PCI_LAST_S			12
 #define VPINT_ALLOC_PCI_LAST_M			ICE_M(0x7FF, 12)
 #define VPINT_ALLOC_PCI_VALID_M			BIT(31)
+#define VPINT_MBX_CTL(_VSI)			(0x0016A000 + ((_VSI) * 4))
+#define VPINT_MBX_CTL_CAUSE_ENA_M		BIT(30)
 #define GLLAN_RCTL_0				0x002941F8
 #define QRX_CONTEXT(_i, _QRX)			(0x00280000 + ((_i) * 8192 + (_QRX) * 4))
 #define QRX_CTRL(_QRX)				(0x00120000 + ((_QRX) * 4))

drivers/net/ethernet/intel/ice/ice_lan_tx_rx.h

@@ -342,12 +342,12 @@ enum ice_tx_desc_cmd_bits {
 	ICE_TX_DESC_CMD_EOP			= 0x0001,
 	ICE_TX_DESC_CMD_RS			= 0x0002,
 	ICE_TX_DESC_CMD_IL2TAG1			= 0x0008,
-	ICE_TX_DESC_CMD_IIPT_IPV6		= 0x0020, /* 2 BITS */
-	ICE_TX_DESC_CMD_IIPT_IPV4		= 0x0040, /* 2 BITS */
-	ICE_TX_DESC_CMD_IIPT_IPV4_CSUM		= 0x0060, /* 2 BITS */
-	ICE_TX_DESC_CMD_L4T_EOFT_TCP		= 0x0100, /* 2 BITS */
-	ICE_TX_DESC_CMD_L4T_EOFT_SCTP		= 0x0200, /* 2 BITS */
-	ICE_TX_DESC_CMD_L4T_EOFT_UDP		= 0x0300, /* 2 BITS */
+	ICE_TX_DESC_CMD_IIPT_IPV6		= 0x0020,
+	ICE_TX_DESC_CMD_IIPT_IPV4		= 0x0040,
+	ICE_TX_DESC_CMD_IIPT_IPV4_CSUM		= 0x0060,
+	ICE_TX_DESC_CMD_L4T_EOFT_TCP		= 0x0100,
+	ICE_TX_DESC_CMD_L4T_EOFT_SCTP		= 0x0200,
+	ICE_TX_DESC_CMD_L4T_EOFT_UDP		= 0x0300,
 };
 
 #define ICE_TXD_QW1_OFFSET_S	16

drivers/net/ethernet/intel/ice/ice_lib.c

@@ -608,11 +608,10 @@ static int __ice_vsi_get_qs_sc(struct ice_qs_cfg *qs_cfg)
 
 /**
  * __ice_vsi_get_qs - helper function for assigning queues from PF to VSI
- * @qs_cfg: gathered variables needed for PF->VSI queues assignment
+ * @qs_cfg: gathered variables needed for pf->vsi queues assignment
  *
- * This is an internal function for assigning queues from the PF to VSI and
- * initially tries to find contiguous space.  If it is not successful to find
- * contiguous space, then it tries with the scatter approach.
+ * This function first tries to find contiguous space. If it is not successful,
+ * it tries with the scatter approach.
  *
  * Return 0 on success and -ENOMEM in case of no left space in PF queue bitmap
  */
@@ -1820,7 +1819,6 @@ ice_cfg_itr(struct ice_hw *hw, struct ice_q_vector *q_vector, u16 vector)
 		rc->target_itr = ITR_TO_REG(rc->itr_setting);
 		rc->next_update = jiffies + 1;
 		rc->current_itr = rc->target_itr;
-		rc->latency_range = ICE_LOW_LATENCY;
 		wr32(hw, GLINT_ITR(rc->itr_idx, vector),
 		     ITR_REG_ALIGN(rc->current_itr) >> ICE_ITR_GRAN_S);
 	}
@@ -1835,7 +1833,6 @@ ice_cfg_itr(struct ice_hw *hw, struct ice_q_vector *q_vector, u16 vector)
 		rc->target_itr = ITR_TO_REG(rc->itr_setting);
 		rc->next_update = jiffies + 1;
 		rc->current_itr = rc->target_itr;
-		rc->latency_range = ICE_LOW_LATENCY;
 		wr32(hw, GLINT_ITR(rc->itr_idx, vector),
 		     ITR_REG_ALIGN(rc->current_itr) >> ICE_ITR_GRAN_S);
 	}

drivers/net/ethernet/intel/ice/ice_lib.h

@@ -70,8 +70,6 @@ void ice_vsi_free_rx_rings(struct ice_vsi *vsi);
 
 void ice_vsi_free_tx_rings(struct ice_vsi *vsi);
 
-int ice_vsi_cfg_tc(struct ice_vsi *vsi, u8 ena_tc);
-
 int ice_vsi_manage_rss_lut(struct ice_vsi *vsi, bool ena);
 
 #endif /* !_ICE_LIB_H_ */

drivers/net/ethernet/intel/ice/ice_main.c

@@ -260,7 +260,11 @@ static int ice_vsi_sync_fltr(struct ice_vsi *vsi)
 	/* Add mac addresses in the sync list */
 	status = ice_add_mac(hw, &vsi->tmp_sync_list);
 	ice_free_fltr_list(dev, &vsi->tmp_sync_list);
-	if (status) {
+	/* If filter is added successfully or already exists, do not go into
+	 * 'if' condition and report it as error. Instead continue processing
+	 * rest of the function.
+	 */
+	if (status && status != ICE_ERR_ALREADY_EXISTS) {
 		netdev_err(netdev, "Failed to add MAC filters\n");
 		/* If there is no more space for new umac filters, vsi
 		 * should go into promiscuous mode. There should be some
@@ -403,6 +407,10 @@ ice_prepare_for_reset(struct ice_pf *pf)
 {
 	struct ice_hw *hw = &pf->hw;
 
+	/* already prepared for reset */
+	if (test_bit(__ICE_PREPARED_FOR_RESET, pf->state))
+		return;
+
 	/* Notify VFs of impending reset */
 	if (ice_check_sq_alive(hw, &hw->mailboxq))
 		ice_vc_notify_reset(pf);
@@ -486,8 +494,7 @@ static void ice_reset_subtask(struct ice_pf *pf)
 		/* return if no valid reset type requested */
 		if (reset_type == ICE_RESET_INVAL)
 			return;
-		if (!test_bit(__ICE_PREPARED_FOR_RESET, pf->state))
-			ice_prepare_for_reset(pf);
+		ice_prepare_for_reset(pf);
 
 		/* make sure we are ready to rebuild */
 		if (ice_check_reset(&pf->hw)) {
@@ -588,6 +595,9 @@ void ice_print_link_msg(struct ice_vsi *vsi, bool isup)
 	case ICE_FC_RX_PAUSE:
 		fc = "RX";
 		break;
+	case ICE_FC_NONE:
+		fc = "None";
+		break;
 	default:
 		fc = "Unknown";
 		break;
@@ -1001,6 +1011,18 @@ static void ice_service_task_stop(struct ice_pf *pf)
 	clear_bit(__ICE_SERVICE_SCHED, pf->state);
 }
 
+/**
+ * ice_service_task_restart - restart service task and schedule works
+ * @pf: board private structure
+ *
+ * This function is needed for suspend and resume works (e.g WoL scenario)
+ */
+static void ice_service_task_restart(struct ice_pf *pf)
+{
+	clear_bit(__ICE_SERVICE_DIS, pf->state);
+	ice_service_task_schedule(pf);
+}
+
 /**
  * ice_service_timer - timer callback to schedule service task
  * @t: pointer to timer_list
@@ -2392,6 +2414,136 @@ static void ice_remove(struct pci_dev *pdev)
 	pci_disable_pcie_error_reporting(pdev);
 }
 
+/**
+ * ice_pci_err_detected - warning that PCI error has been detected
+ * @pdev: PCI device information struct
+ * @err: the type of PCI error
+ *
+ * Called to warn that something happened on the PCI bus and the error handling
+ * is in progress.  Allows the driver to gracefully prepare/handle PCI errors.
+ */
+static pci_ers_result_t
+ice_pci_err_detected(struct pci_dev *pdev, enum pci_channel_state err)
+{
+	struct ice_pf *pf = pci_get_drvdata(pdev);
+
+	if (!pf) {
+		dev_err(&pdev->dev, "%s: unrecoverable device error %d\n",
+			__func__, err);
+		return PCI_ERS_RESULT_DISCONNECT;
+	}
+
+	if (!test_bit(__ICE_SUSPENDED, pf->state)) {
+		ice_service_task_stop(pf);
+
+		if (!test_bit(__ICE_PREPARED_FOR_RESET, pf->state)) {
+			set_bit(__ICE_PFR_REQ, pf->state);
+			ice_prepare_for_reset(pf);
+		}
+	}
+
+	return PCI_ERS_RESULT_NEED_RESET;
+}
+
+/**
+ * ice_pci_err_slot_reset - a PCI slot reset has just happened
+ * @pdev: PCI device information struct
+ *
+ * Called to determine if the driver can recover from the PCI slot reset by
+ * using a register read to determine if the device is recoverable.
+ */
+static pci_ers_result_t ice_pci_err_slot_reset(struct pci_dev *pdev)
+{
+	struct ice_pf *pf = pci_get_drvdata(pdev);
+	pci_ers_result_t result;
+	int err;
+	u32 reg;
+
+	err = pci_enable_device_mem(pdev);
+	if (err) {
+		dev_err(&pdev->dev,
+			"Cannot re-enable PCI device after reset, error %d\n",
+			err);
+		result = PCI_ERS_RESULT_DISCONNECT;
+	} else {
+		pci_set_master(pdev);
+		pci_restore_state(pdev);
+		pci_save_state(pdev);
+		pci_wake_from_d3(pdev, false);
+
+		/* Check for life */
+		reg = rd32(&pf->hw, GLGEN_RTRIG);
+		if (!reg)
+			result = PCI_ERS_RESULT_RECOVERED;
+		else
+			result = PCI_ERS_RESULT_DISCONNECT;
+	}
+
+	err = pci_cleanup_aer_uncorrect_error_status(pdev);
+	if (err)
+		dev_dbg(&pdev->dev,
+			"pci_cleanup_aer_uncorrect_error_status failed, error %d\n",
+			err);
+		/* non-fatal, continue */
+
+	return result;
+}
+
+/**
+ * ice_pci_err_resume - restart operations after PCI error recovery
+ * @pdev: PCI device information struct
+ *
+ * Called to allow the driver to bring things back up after PCI error and/or
+ * reset recovery have finished
+ */
+static void ice_pci_err_resume(struct pci_dev *pdev)
+{
+	struct ice_pf *pf = pci_get_drvdata(pdev);
+
+	if (!pf) {
+		dev_err(&pdev->dev,
+			"%s failed, device is unrecoverable\n", __func__);
+		return;
+	}
+
+	if (test_bit(__ICE_SUSPENDED, pf->state)) {
+		dev_dbg(&pdev->dev, "%s failed to resume normal operations!\n",
+			__func__);
+		return;
+	}
+
+	ice_do_reset(pf, ICE_RESET_PFR);
+	ice_service_task_restart(pf);
+	mod_timer(&pf->serv_tmr, round_jiffies(jiffies + pf->serv_tmr_period));
+}
+
+/**
+ * ice_pci_err_reset_prepare - prepare device driver for PCI reset
+ * @pdev: PCI device information struct
+ */
+static void ice_pci_err_reset_prepare(struct pci_dev *pdev)
+{
+	struct ice_pf *pf = pci_get_drvdata(pdev);
+
+	if (!test_bit(__ICE_SUSPENDED, pf->state)) {
+		ice_service_task_stop(pf);
+
+		if (!test_bit(__ICE_PREPARED_FOR_RESET, pf->state)) {
+			set_bit(__ICE_PFR_REQ, pf->state);
+			ice_prepare_for_reset(pf);
+		}
+	}
+}
+
+/**
+ * ice_pci_err_reset_done - PCI reset done, device driver reset can begin
+ * @pdev: PCI device information struct
+ */
+static void ice_pci_err_reset_done(struct pci_dev *pdev)
+{
+	ice_pci_err_resume(pdev);
+}
+
 /* ice_pci_tbl - PCI Device ID Table
  *
  * Wildcard entries (PCI_ANY_ID) should come last
@@ -2409,12 +2561,21 @@ static const struct pci_device_id ice_pci_tbl[] = {
 };
 MODULE_DEVICE_TABLE(pci, ice_pci_tbl);
 
+static const struct pci_error_handlers ice_pci_err_handler = {
+	.error_detected = ice_pci_err_detected,
+	.slot_reset = ice_pci_err_slot_reset,
+	.reset_prepare = ice_pci_err_reset_prepare,
+	.reset_done = ice_pci_err_reset_done,
+	.resume = ice_pci_err_resume
+};
+
 static struct pci_driver ice_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = ice_pci_tbl,
 	.probe = ice_probe,
 	.remove = ice_remove,
 	.sriov_configure = ice_sriov_configure,
+	.err_handler = &ice_pci_err_handler
 };
 
 /**