Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR.

Conflicts:

net/ipv4/ip_gre.c
  17af420545a7 ("erspan: make sure erspan_base_hdr is present in skb->head")
  5832c4a77d69 ("ip_tunnel: convert __be16 tunnel flags to bitmaps")
https://lore.kernel.org/all/20240402103253.3b54a1cf@canb.auug.org.au/

Adjacent changes:

net/ipv6/ip6_fib.c
  d21d40605bca ("ipv6: Fix infinite recursion in fib6_dump_done().")
  5fc68320c1fb ("ipv6: remove RTNL protection from inet6_dump_fib()")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

6 files changed, 99 insertions, 46 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index ba24f3fa92c3..2fbabcdb5bb5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -955,6 +955,7 @@ struct i40e_q_vector {
 	struct rcu_head rcu;	/* to avoid race with update stats on free */
 	char name[I40E_INT_NAME_STR_LEN];
 	bool arm_wb_state;
+	bool in_busy_poll;
 	int irq_num;		/* IRQ assigned to this q_vector */
 } ____cacheline_internodealigned_in_smp;
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 3c7d6ea84491..0bdcdea0be3e 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -1253,8 +1253,11 @@ int i40e_count_filters(struct i40e_vsi *vsi)
 	int bkt;
 	int cnt = 0;
 
-	hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist)
-		++cnt;
+	hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
+		if (f->state == I40E_FILTER_NEW ||
+		    f->state == I40E_FILTER_ACTIVE)
+			++cnt;
+	}
 
 	return cnt;
 }
@@ -3911,6 +3914,12 @@ static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
 		     q_vector->tx.target_itr >> 1);
 		q_vector->tx.current_itr = q_vector->tx.target_itr;
 
+		/* Set ITR for software interrupts triggered after exiting
+		 * busy-loop polling.
+		 */
+		wr32(hw, I40E_PFINT_ITRN(I40E_SW_ITR, vector - 1),
+		     I40E_ITR_20K);
+
 		wr32(hw, I40E_PFINT_RATEN(vector - 1),
 		     i40e_intrl_usec_to_reg(vsi->int_rate_limit));
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_register.h b/drivers/net/ethernet/intel/i40e/i40e_register.h
index 14ab642cafdb..432afbb64201 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_register.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_register.h
@@ -333,8 +333,11 @@
 #define I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT 3
 #define I40E_PFINT_DYN_CTLN_ITR_INDX_MASK I40E_MASK(0x3, I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT)
 #define I40E_PFINT_DYN_CTLN_INTERVAL_SHIFT 5
+#define I40E_PFINT_DYN_CTLN_INTERVAL_MASK I40E_MASK(0xFFF, I40E_PFINT_DYN_CTLN_INTERVAL_SHIFT)
 #define I40E_PFINT_DYN_CTLN_SW_ITR_INDX_ENA_SHIFT 24
 #define I40E_PFINT_DYN_CTLN_SW_ITR_INDX_ENA_MASK I40E_MASK(0x1, I40E_PFINT_DYN_CTLN_SW_ITR_INDX_ENA_SHIFT)
+#define I40E_PFINT_DYN_CTLN_SW_ITR_INDX_SHIFT 25
+#define I40E_PFINT_DYN_CTLN_SW_ITR_INDX_MASK I40E_MASK(0x3, I40E_PFINT_DYN_CTLN_SW_ITR_INDX_SHIFT)
 #define I40E_PFINT_ICR0 0x00038780 /* Reset: CORER */
 #define I40E_PFINT_ICR0_INTEVENT_SHIFT 0
 #define I40E_PFINT_ICR0_INTEVENT_MASK I40E_MASK(0x1, I40E_PFINT_ICR0_INTEVENT_SHIFT)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index ac2fcc5ac595..64d198ed166b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -2628,7 +2628,22 @@ process_next:
 	return failure ? budget : (int)total_rx_packets;
 }
 
-static inline u32 i40e_buildreg_itr(const int type, u16 itr)
+/**
+ * i40e_buildreg_itr - build a value for writing to I40E_PFINT_DYN_CTLN register
+ * @itr_idx: interrupt throttling index
+ * @interval: interrupt throttling interval value in usecs
+ * @force_swint: force software interrupt
+ *
+ * The function builds a value for I40E_PFINT_DYN_CTLN register that
+ * is used to update interrupt throttling interval for specified ITR index
+ * and optionally enforces a software interrupt. If the @itr_idx is equal
+ * to I40E_ITR_NONE then no interval change is applied and only @force_swint
+ * parameter is taken into account. If the interval change and enforced
+ * software interrupt are not requested then the built value just enables
+ * appropriate vector interrupt.
+ **/
+static u32 i40e_buildreg_itr(enum i40e_dyn_idx itr_idx, u16 interval,
+			     bool force_swint)
 {
 	u32 val;
 
@@ -2642,23 +2657,33 @@ static inline u32 i40e_buildreg_itr(const int type, u16 itr)
 	 * an event in the PBA anyway so we need to rely on the automask
 	 * to hold pending events for us until the interrupt is re-enabled
 	 *
-	 * The itr value is reported in microseconds, and the register
-	 * value is recorded in 2 microsecond units. For this reason we
-	 * only need to shift by the interval shift - 1 instead of the
-	 * full value.
+	 * We have to shift the given value as it is reported in microseconds
+	 * and the register value is recorded in 2 microsecond units.
 	 */
-	itr &= I40E_ITR_MASK;
+	interval >>= 1;
 
+	/* 1. Enable vector interrupt
+	 * 2. Update the interval for the specified ITR index
+	 *    (I40E_ITR_NONE in the register is used to indicate that
+	 *     no interval update is requested)
+	 */
 	val = I40E_PFINT_DYN_CTLN_INTENA_MASK |
-	      (type << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT) |
-	      (itr << (I40E_PFINT_DYN_CTLN_INTERVAL_SHIFT - 1));
+	      FIELD_PREP(I40E_PFINT_DYN_CTLN_ITR_INDX_MASK, itr_idx) |
+	      FIELD_PREP(I40E_PFINT_DYN_CTLN_INTERVAL_MASK, interval);
+
+	/* 3. Enforce software interrupt trigger if requested
+	 *    (These software interrupts rate is limited by ITR2 that is
+	 *     set to 20K interrupts per second)
+	 */
+	if (force_swint)
+		val |= I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK |
+		       I40E_PFINT_DYN_CTLN_SW_ITR_INDX_ENA_MASK |
+		       FIELD_PREP(I40E_PFINT_DYN_CTLN_SW_ITR_INDX_MASK,
+				  I40E_SW_ITR);
 
 	return val;
 }
 
-/* a small macro to shorten up some long lines */
-#define INTREG I40E_PFINT_DYN_CTLN
-
 /* The act of updating the ITR will cause it to immediately trigger. In order
  * to prevent this from throwing off adaptive update statistics we defer the
  * update so that it can only happen so often. So after either Tx or Rx are
@@ -2677,8 +2702,10 @@ static inline u32 i40e_buildreg_itr(const int type, u16 itr)
 static inline void i40e_update_enable_itr(struct i40e_vsi *vsi,
 					  struct i40e_q_vector *q_vector)
 {
+	enum i40e_dyn_idx itr_idx = I40E_ITR_NONE;
 	struct i40e_hw *hw = &vsi->back->hw;
-	u32 intval;
+	u16 interval = 0;
+	u32 itr_val;
 
 	/* If we don't have MSIX, then we only need to re-enable icr0 */
 	if (!test_bit(I40E_FLAG_MSIX_ENA, vsi->back->flags)) {
@@ -2700,8 +2727,8 @@ static inline void i40e_update_enable_itr(struct i40e_vsi *vsi,
 	 */
 	if (q_vector->rx.target_itr < q_vector->rx.current_itr) {
 		/* Rx ITR needs to be reduced, this is highest priority */
-		intval = i40e_buildreg_itr(I40E_RX_ITR,
-					   q_vector->rx.target_itr);
+		itr_idx = I40E_RX_ITR;
+		interval = q_vector->rx.target_itr;
 		q_vector->rx.current_itr = q_vector->rx.target_itr;
 		q_vector->itr_countdown = ITR_COUNTDOWN_START;
 	} else if ((q_vector->tx.target_itr < q_vector->tx.current_itr) ||
@@ -2710,25 +2737,36 @@ static inline void i40e_update_enable_itr(struct i40e_vsi *vsi,
 		/* Tx ITR needs to be reduced, this is second priority
 		 * Tx ITR needs to be increased more than Rx, fourth priority
 		 */
-		intval = i40e_buildreg_itr(I40E_TX_ITR,
-					   q_vector->tx.target_itr);
+		itr_idx = I40E_TX_ITR;
+		interval = q_vector->tx.target_itr;
 		q_vector->tx.current_itr = q_vector->tx.target_itr;
 		q_vector->itr_countdown = ITR_COUNTDOWN_START;
 	} else if (q_vector->rx.current_itr != q_vector->rx.target_itr) {
 		/* Rx ITR needs to be increased, third priority */
-		intval = i40e_buildreg_itr(I40E_RX_ITR,
-					   q_vector->rx.target_itr);
+		itr_idx = I40E_RX_ITR;
+		interval = q_vector->rx.target_itr;
 		q_vector->rx.current_itr = q_vector->rx.target_itr;
 		q_vector->itr_countdown = ITR_COUNTDOWN_START;
 	} else {
 		/* No ITR update, lowest priority */
-		intval = i40e_buildreg_itr(I40E_ITR_NONE, 0);
 		if (q_vector->itr_countdown)
 			q_vector->itr_countdown--;
 	}
 
-	if (!test_bit(__I40E_VSI_DOWN, vsi->state))
-		wr32(hw, INTREG(q_vector->reg_idx), intval);
+	/* Do not update interrupt control register if VSI is down */
+	if (test_bit(__I40E_VSI_DOWN, vsi->state))
+		return;
+
+	/* Update ITR interval if necessary and enforce software interrupt
+	 * if we are exiting busy poll.
+	 */
+	if (q_vector->in_busy_poll) {
+		itr_val = i40e_buildreg_itr(itr_idx, interval, true);
+		q_vector->in_busy_poll = false;
+	} else {
+		itr_val = i40e_buildreg_itr(itr_idx, interval, false);
+	}
+	wr32(hw, I40E_PFINT_DYN_CTLN(q_vector->reg_idx), itr_val);
 }
 
 /**
@@ -2843,6 +2881,8 @@ tx_only:
 	 */
 	if (likely(napi_complete_done(napi, work_done)))
 		i40e_update_enable_itr(vsi, q_vector);
+	else
+		q_vector->in_busy_poll = true;
 
 	return min(work_done, budget - 1);
 }
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.h b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
index abf15067eb5d..2cdc7de6301c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.h
@@ -68,6 +68,7 @@ enum i40e_dyn_idx {
 /* these are indexes into ITRN registers */
 #define I40E_RX_ITR    I40E_IDX_ITR0
 #define I40E_TX_ITR    I40E_IDX_ITR1
+#define I40E_SW_ITR    I40E_IDX_ITR2
 
 /* Supported RSS offloads */
 #define I40E_DEFAULT_RSS_HENA ( \
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 83a34e98bdc7..232b65b9c8ea 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1624,8 +1624,8 @@ bool i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
 {
 	struct i40e_hw *hw = &pf->hw;
 	struct i40e_vf *vf;
-	int i, v;
 	u32 reg;
+	int i;
 
 	/* If we don't have any VFs, then there is nothing to reset */
 	if (!pf->num_alloc_vfs)
@@ -1636,11 +1636,10 @@ bool i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
 		return false;
 
 	/* Begin reset on all VFs at once */
-	for (v = 0; v < pf->num_alloc_vfs; v++) {
-		vf = &pf->vf[v];
+	for (vf = &pf->vf[0]; vf < &pf->vf[pf->num_alloc_vfs]; ++vf) {
 		/* If VF is being reset no need to trigger reset again */
 		if (!test_bit(I40E_VF_STATE_RESETTING, &vf->vf_states))
-			i40e_trigger_vf_reset(&pf->vf[v], flr);
+			i40e_trigger_vf_reset(vf, flr);
 	}
 
 	/* HW requires some time to make sure it can flush the FIFO for a VF
@@ -1649,14 +1648,13 @@ bool i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
 	 * the VFs using a simple iterator that increments once that VF has
 	 * finished resetting.
 	 */
-	for (i = 0, v = 0; i < 10 && v < pf->num_alloc_vfs; i++) {
+	for (i = 0, vf = &pf->vf[0]; i < 10 && vf < &pf->vf[pf->num_alloc_vfs]; ++i) {
 		usleep_range(10000, 20000);
 
 		/* Check each VF in sequence, beginning with the VF to fail
 		 * the previous check.
 		 */
-		while (v < pf->num_alloc_vfs) {
-			vf = &pf->vf[v];
+		while (vf < &pf->vf[pf->num_alloc_vfs]) {
 			if (!test_bit(I40E_VF_STATE_RESETTING, &vf->vf_states)) {
 				reg = rd32(hw, I40E_VPGEN_VFRSTAT(vf->vf_id));
 				if (!(reg & I40E_VPGEN_VFRSTAT_VFRD_MASK))
@@ -1666,7 +1664,7 @@ bool i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
 			/* If the current VF has finished resetting, move on
 			 * to the next VF in sequence.
 			 */
-			v++;
+			++vf;
 		}
 	}
 
@@ -1676,39 +1674,39 @@ bool i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
 	/* Display a warning if at least one VF didn't manage to reset in
 	 * time, but continue on with the operation.
 	 */
-	if (v < pf->num_alloc_vfs)
+	if (vf < &pf->vf[pf->num_alloc_vfs])
 		dev_err(&pf->pdev->dev, "VF reset check timeout on VF %d\n",
-			pf->vf[v].vf_id);
+			vf->vf_id);
 	usleep_range(10000, 20000);
 
 	/* Begin disabling all the rings associated with VFs, but do not wait
 	 * between each VF.
 	 */
-	for (v = 0; v < pf->num_alloc_vfs; v++) {
+	for (vf = &pf->vf[0]; vf < &pf->vf[pf->num_alloc_vfs]; ++vf) {
 		/* On initial reset, we don't have any queues to disable */
-		if (pf->vf[v].lan_vsi_idx == 0)
+		if (vf->lan_vsi_idx == 0)
 			continue;
 
 		/* If VF is reset in another thread just continue */
 		if (test_bit(I40E_VF_STATE_RESETTING, &vf->vf_states))
 			continue;
 
-		i40e_vsi_stop_rings_no_wait(pf->vsi[pf->vf[v].lan_vsi_idx]);
+		i40e_vsi_stop_rings_no_wait(pf->vsi[vf->lan_vsi_idx]);
 	}
 
 	/* Now that we've notified HW to disable all of the VF rings, wait
 	 * until they finish.
 	 */
-	for (v = 0; v < pf->num_alloc_vfs; v++) {
+	for (vf = &pf->vf[0]; vf < &pf->vf[pf->num_alloc_vfs]; ++vf) {
 		/* On initial reset, we don't have any queues to disable */
-		if (pf->vf[v].lan_vsi_idx == 0)
+		if (vf->lan_vsi_idx == 0)
 			continue;
 
 		/* If VF is reset in another thread just continue */
 		if (test_bit(I40E_VF_STATE_RESETTING, &vf->vf_states))
 			continue;
 
-		i40e_vsi_wait_queues_disabled(pf->vsi[pf->vf[v].lan_vsi_idx]);
+		i40e_vsi_wait_queues_disabled(pf->vsi[vf->lan_vsi_idx]);
 	}
 
 	/* Hw may need up to 50ms to finish disabling the RX queues. We
@@ -1717,12 +1715,12 @@ bool i40e_reset_all_vfs(struct i40e_pf *pf, bool flr)
 	mdelay(50);
 
 	/* Finish the reset on each VF */
-	for (v = 0; v < pf->num_alloc_vfs; v++) {
+	for (vf = &pf->vf[0]; vf < &pf->vf[pf->num_alloc_vfs]; ++vf) {
 		/* If VF is reset in another thread just continue */
 		if (test_bit(I40E_VF_STATE_RESETTING, &vf->vf_states))
 			continue;
 
-		i40e_cleanup_reset_vf(&pf->vf[v]);
+		i40e_cleanup_reset_vf(vf);
 	}
 
 	i40e_flush(hw);
@@ -3139,11 +3137,12 @@ static int i40e_vc_del_mac_addr_msg(struct i40e_vf *vf, u8 *msg)
 		/* Allow to delete VF primary MAC only if it was not set
 		 * administratively by PF or if VF is trusted.
 		 */
-		if (ether_addr_equal(addr, vf->default_lan_addr.addr) &&
-		    i40e_can_vf_change_mac(vf))
-			was_unimac_deleted = true;
-		else
-			continue;
+		if (ether_addr_equal(addr, vf->default_lan_addr.addr)) {
+			if (i40e_can_vf_change_mac(vf))
+				was_unimac_deleted = true;
+			else
+				continue;
+		}
 
 		if (i40e_del_mac_filter(vsi, al->list[i].addr)) {
 			ret = -EINVAL;