ixgbe: add structure for containing RX/TX rings to q_vector

This patch adds support for a ring container structure to be used within
the q_vector.  The basic idea is to provide a means of separating the RX
and TX rings while maintaining a common structure for their containment.
The advantage to this is that later we should be able to pass this
structure to the update_itr functions without needing to pass individual
rings.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

3 files changed, 88 insertions, 84 deletions

diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index 744b64108130..a5ed9fd69fdd 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -277,6 +277,15 @@ struct ixgbe_ring_feature {
         int mask;
 } ____cacheline_internodealigned_in_smp;
 
+struct ixgbe_ring_container {
+#if MAX_RX_QUEUES > MAX_TX_QUEUES
+        DECLARE_BITMAP(idx, MAX_RX_QUEUES);
+#else
+        DECLARE_BITMAP(idx, MAX_TX_QUEUES);
+#endif
+        u8 count;                       /* total number of rings in vector */
+        u8 itr;                         /* current ITR setting for ring */
+};
 
 #define MAX_RX_PACKET_BUFFERS ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) \
                               ? 8 : 1)
@@ -294,12 +303,7 @@ struct ixgbe_q_vector {
         int cpu;            /* CPU for DCA */
 #endif
         struct napi_struct napi;
-        DECLARE_BITMAP(rxr_idx, MAX_RX_QUEUES); /* Rx ring indices */
-        DECLARE_BITMAP(txr_idx, MAX_TX_QUEUES); /* Tx ring indices */
-        u8 rxr_count;     /* Rx ring count assigned to this vector */
-        u8 txr_count;     /* Tx ring count assigned to this vector */
-        u8 tx_itr;
-        u8 rx_itr;
+        struct ixgbe_ring_container rx, tx;
         u32 eitr;
         cpumask_var_t affinity_mask;
         char name[IFNAMSIZ + 9];
diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index 074e9baf069a..cd842f9dcae5 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -2122,7 +2122,7 @@ static int ixgbe_get_coalesce(struct net_device *netdev,
         }
 
         /* if in mixed tx/rx queues per vector mode, report only rx settings */
-        if (adapter->q_vector[0]->txr_count && adapter->q_vector[0]->rxr_count)
+        if (adapter->q_vector[0]->tx.count && adapter->q_vector[0]->rx.count)
                 return 0;
 
         /* only valid if in constant ITR mode */
@@ -2187,7 +2187,7 @@ static int ixgbe_set_coalesce(struct net_device *netdev,
         bool need_reset = false;
 
         /* don't accept tx specific changes if we've got mixed RxTx vectors */
-        if (adapter->q_vector[0]->txr_count && adapter->q_vector[0]->rxr_count
+        if (adapter->q_vector[0]->tx.count && adapter->q_vector[0]->rx.count
            && ec->tx_coalesce_usecs)
                 return -EINVAL;
 
@@ -2261,7 +2261,7 @@ static int ixgbe_set_coalesce(struct net_device *netdev,
                 int num_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
                 for (i = 0; i < num_vectors; i++) {
                         q_vector = adapter->q_vector[i];
-                        if (q_vector->txr_count && !q_vector->rxr_count)
+                        if (q_vector->tx.count && !q_vector->rx.count)
                                 /* tx only */
                                 q_vector->eitr = adapter->tx_eitr_param;
                         else
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 7275c5cc09b2..bd1fd8f422dc 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -959,17 +959,17 @@ static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
         if (q_vector->cpu == cpu)
                 goto out_no_update;
 
-        r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
-        for (i = 0; i < q_vector->txr_count; i++) {
+        r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
+        for (i = 0; i < q_vector->tx.count; i++) {
                 ixgbe_update_tx_dca(adapter, adapter->tx_ring[r_idx], cpu);
-                r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
+                r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
                                       r_idx + 1);
         }
 
-        r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
-        for (i = 0; i < q_vector->rxr_count; i++) {
+        r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
+        for (i = 0; i < q_vector->rx.count; i++) {
                 ixgbe_update_rx_dca(adapter, adapter->rx_ring[r_idx], cpu);
-                r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
+                r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
                                       r_idx + 1);
         }
 
@@ -1517,31 +1517,31 @@ static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
                 q_vector = adapter->q_vector[v_idx];
                 /* XXX for_each_set_bit(...) */
-                r_idx = find_first_bit(q_vector->rxr_idx,
+                r_idx = find_first_bit(q_vector->rx.idx,
                                        adapter->num_rx_queues);
 
-                for (i = 0; i < q_vector->rxr_count; i++) {
+                for (i = 0; i < q_vector->rx.count; i++) {
                         u8 reg_idx = adapter->rx_ring[r_idx]->reg_idx;
                         ixgbe_set_ivar(adapter, 0, reg_idx, v_idx);
-                        r_idx = find_next_bit(q_vector->rxr_idx,
+                        r_idx = find_next_bit(q_vector->rx.idx,
                                               adapter->num_rx_queues,
                                               r_idx + 1);
                 }
-                r_idx = find_first_bit(q_vector->txr_idx,
+                r_idx = find_first_bit(q_vector->tx.idx,
                                        adapter->num_tx_queues);
 
-                for (i = 0; i < q_vector->txr_count; i++) {
+                for (i = 0; i < q_vector->tx.count; i++) {
                         u8 reg_idx = adapter->tx_ring[r_idx]->reg_idx;
                         ixgbe_set_ivar(adapter, 1, reg_idx, v_idx);
-                        r_idx = find_next_bit(q_vector->txr_idx,
+                        r_idx = find_next_bit(q_vector->tx.idx,
                                               adapter->num_tx_queues,
                                               r_idx + 1);
                 }
 
-                if (q_vector->txr_count && !q_vector->rxr_count)
+                if (q_vector->tx.count && !q_vector->rx.count)
                         /* tx only */
                         q_vector->eitr = adapter->tx_eitr_param;
-                else if (q_vector->rxr_count)
+                else if (q_vector->rx.count)
                         /* rx or mixed */
                         q_vector->eitr = adapter->rx_eitr_param;
 
@@ -1705,37 +1705,37 @@ static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
         u32 new_itr;
         u8 current_itr, ret_itr;
 
-        r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
-        for (i = 0; i < q_vector->txr_count; i++) {
+        r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
+        for (i = 0; i < q_vector->tx.count; i++) {
                 struct ixgbe_ring *tx_ring = adapter->tx_ring[r_idx];
                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
-                                           q_vector->tx_itr,
+                                           q_vector->tx.itr,
                                            tx_ring->total_packets,
                                            tx_ring->total_bytes);
                 /* if the result for this queue would decrease interrupt
                  * rate for this vector then use that result */
-                q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
-                                    q_vector->tx_itr - 1 : ret_itr);
-                r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
+                q_vector->tx.itr = ((q_vector->tx.itr > ret_itr) ?
+                                    q_vector->tx.itr - 1 : ret_itr);
+                r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
                                       r_idx + 1);
         }
 
-        r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
-        for (i = 0; i < q_vector->rxr_count; i++) {
+        r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
+        for (i = 0; i < q_vector->rx.count; i++) {
                 struct ixgbe_ring *rx_ring = adapter->rx_ring[r_idx];
                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
-                                           q_vector->rx_itr,
+                                           q_vector->rx.itr,
                                            rx_ring->total_packets,
                                            rx_ring->total_bytes);
                 /* if the result for this queue would decrease interrupt
                  * rate for this vector then use that result */
-                q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
-                                    q_vector->rx_itr - 1 : ret_itr);
-                r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
+                q_vector->rx.itr = ((q_vector->rx.itr > ret_itr) ?
+                                    q_vector->rx.itr - 1 : ret_itr);
+                r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
                                       r_idx + 1);
         }
 
-        current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
+        current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
 
         switch (current_itr) {
         /* counts and packets in update_itr are dependent on these numbers */
@@ -1995,15 +1995,15 @@ static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
         struct ixgbe_ring     *tx_ring;
         int i, r_idx;
 
-        if (!q_vector->txr_count)
+        if (!q_vector->tx.count)
                 return IRQ_HANDLED;
 
-        r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
-        for (i = 0; i < q_vector->txr_count; i++) {
+        r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
+        for (i = 0; i < q_vector->tx.count; i++) {
                 tx_ring = adapter->tx_ring[r_idx];
                 tx_ring->total_bytes = 0;
                 tx_ring->total_packets = 0;
-                r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
+                r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
                                       r_idx + 1);
         }
 
@@ -2031,16 +2031,16 @@ static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
                 ixgbe_update_dca(q_vector);
 #endif
 
-        r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
-        for (i = 0; i < q_vector->rxr_count; i++) {
+        r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
+        for (i = 0; i < q_vector->rx.count; i++) {
                 rx_ring = adapter->rx_ring[r_idx];
                 rx_ring->total_bytes = 0;
                 rx_ring->total_packets = 0;
-                r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
+                r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
                                       r_idx + 1);
         }
 
-        if (!q_vector->rxr_count)
+        if (!q_vector->rx.count)
                 return IRQ_HANDLED;
 
         /* EIAM disabled interrupts (on this vector) for us */
@@ -2057,24 +2057,24 @@ static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
         int r_idx;
         int i;
 
-        if (!q_vector->txr_count && !q_vector->rxr_count)
+        if (!q_vector->tx.count && !q_vector->rx.count)
                 return IRQ_HANDLED;
 
-        r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
-        for (i = 0; i < q_vector->txr_count; i++) {
+        r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
+        for (i = 0; i < q_vector->tx.count; i++) {
                 ring = adapter->tx_ring[r_idx];
                 ring->total_bytes = 0;
                 ring->total_packets = 0;
-                r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
+                r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
                                       r_idx + 1);
         }
 
-        r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
-        for (i = 0; i < q_vector->rxr_count; i++) {
+        r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
+        for (i = 0; i < q_vector->rx.count; i++) {
                 ring = adapter->rx_ring[r_idx];
                 ring->total_bytes = 0;
                 ring->total_packets = 0;
-                r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
+                r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
                                       r_idx + 1);
         }
 
@@ -2106,7 +2106,7 @@ static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
                 ixgbe_update_dca(q_vector);
 #endif
 
-        r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
+        r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
         rx_ring = adapter->rx_ring[r_idx];
 
         ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
@@ -2147,27 +2147,27 @@ static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
                 ixgbe_update_dca(q_vector);
 #endif
 
-        r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
-        for (i = 0; i < q_vector->txr_count; i++) {
+        r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
+        for (i = 0; i < q_vector->tx.count; i++) {
                 ring = adapter->tx_ring[r_idx];
                 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
-                r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
+                r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
                                       r_idx + 1);
         }
 
         /* attempt to distribute budget to each queue fairly, but don't allow
          * the budget to go below 1 because we'll exit polling */
-        budget /= (q_vector->rxr_count ?: 1);
+        budget /= (q_vector->rx.count ?: 1);
         budget = max(budget, 1);
-        r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
-        for (i = 0; i < q_vector->rxr_count; i++) {
+        r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
+        for (i = 0; i < q_vector->rx.count; i++) {
                 ring = adapter->rx_ring[r_idx];
                 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
-                r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
+                r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
                                       r_idx + 1);
         }
 
-        r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
+        r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
         ring = adapter->rx_ring[r_idx];
         /* If all Rx work done, exit the polling mode */
         if (work_done < budget) {
@@ -2205,7 +2205,7 @@ static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
                 ixgbe_update_dca(q_vector);
 #endif
 
-        r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
+        r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
         tx_ring = adapter->tx_ring[r_idx];
 
         if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
@@ -2230,8 +2230,8 @@ static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
         struct ixgbe_ring *rx_ring = a->rx_ring[r_idx];
 
-        set_bit(r_idx, q_vector->rxr_idx);
-        q_vector->rxr_count++;
+        set_bit(r_idx, q_vector->rx.idx);
+        q_vector->rx.count++;
         rx_ring->q_vector = q_vector;
 }
 
@@ -2241,8 +2241,8 @@ static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
         struct ixgbe_ring *tx_ring = a->tx_ring[t_idx];
 
-        set_bit(t_idx, q_vector->txr_idx);
-        q_vector->txr_count++;
+        set_bit(t_idx, q_vector->tx.idx);
+        q_vector->tx.count++;
         tx_ring->q_vector = q_vector;
 }
 
@@ -2332,10 +2332,10 @@ static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
         if (err)
                 return err;
 
-#define SET_HANDLER(_v) (((_v)->rxr_count && (_v)->txr_count)        \
+#define SET_HANDLER(_v) (((_v)->rx.count && (_v)->tx.count)        \
                                           ? &ixgbe_msix_clean_many : \
-                          (_v)->rxr_count ? &ixgbe_msix_clean_rx   : \
-                          (_v)->txr_count ? &ixgbe_msix_clean_tx   : \
+                          (_v)->rx.count ? &ixgbe_msix_clean_rx   : \
+                          (_v)->tx.count ? &ixgbe_msix_clean_tx   : \
                           NULL)
         for (vector = 0; vector < q_vectors; vector++) {
                 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
@@ -2394,16 +2394,16 @@ static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
         u32 new_itr = q_vector->eitr;
         u8 current_itr;
 
-        q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
-                                            q_vector->tx_itr,
+        q_vector->tx.itr = ixgbe_update_itr(adapter, new_itr,
+                                            q_vector->tx.itr,
                                             tx_ring->total_packets,
                                             tx_ring->total_bytes);
-        q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
-                                            q_vector->rx_itr,
+        q_vector->rx.itr = ixgbe_update_itr(adapter, new_itr,
+                                            q_vector->rx.itr,
                                             rx_ring->total_packets,
                                             rx_ring->total_bytes);
 
-        current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
+        current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
 
         switch (current_itr) {
         /* counts and packets in update_itr are dependent on these numbers */
@@ -2553,10 +2553,10 @@ static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
 
         for (i = 0; i < q_vectors; i++) {
                 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
-                bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
-                bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
-                q_vector->rxr_count = 0;
-                q_vector->txr_count = 0;
+                bitmap_zero(q_vector->rx.idx, MAX_RX_QUEUES);
+                bitmap_zero(q_vector->tx.idx, MAX_TX_QUEUES);
+                q_vector->rx.count = 0;
+                q_vector->tx.count = 0;
         }
 }
 
@@ -2601,8 +2601,8 @@ static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
                 i--;
                 for (; i >= 0; i--) {
                         /* free only the irqs that were actually requested */
-                        if (!adapter->q_vector[i]->rxr_count &&
-                            !adapter->q_vector[i]->txr_count)
+                        if (!adapter->q_vector[i]->rx.count &&
+                            !adapter->q_vector[i]->tx.count)
                                 continue;
 
                         free_irq(adapter->msix_entries[i].vector,
@@ -3616,10 +3616,10 @@ static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
                 q_vector = adapter->q_vector[q_idx];
                 napi = &q_vector->napi;
                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
-                        if (!q_vector->rxr_count || !q_vector->txr_count) {
-                                if (q_vector->txr_count == 1)
+                        if (!q_vector->rx.count || !q_vector->tx.count) {
+                                if (q_vector->tx.count == 1)
                                         napi->poll = &ixgbe_clean_txonly;
-                                else if (q_vector->rxr_count == 1)
+                                else if (q_vector->rx.count == 1)
                                         napi->poll = &ixgbe_clean_rxonly;
                         }
                 }
@@ -4965,7 +4965,7 @@ static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
                 if (!q_vector)
                         goto err_out;
                 q_vector->adapter = adapter;
-                if (q_vector->txr_count && !q_vector->rxr_count)
+                if (q_vector->tx.count && !q_vector->rx.count)
                         q_vector->eitr = adapter->tx_eitr_param;
                 else
                         q_vector->eitr = adapter->rx_eitr_param;
@@ -5979,7 +5979,7 @@ static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
                 /* get one bit for every active tx/rx interrupt vector */
                 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
                         struct ixgbe_q_vector *qv = adapter->q_vector[i];
-                        if (qv->rxr_count || qv->txr_count)
+                        if (qv->rx.count || qv->tx.count)
                                 eics |= ((u64)1 << i);
                 }
         }