net: ethernet: aquantia: Vector operations
authorDavid VomLehn <vomlehn@texas.net>
Tue, 24 Jan 2017 06:09:14 +0000 (22:09 -0800)
committerDavid S. Miller <davem@davemloft.net>
Tue, 24 Jan 2017 20:03:40 +0000 (15:03 -0500)
Add functions to manululate the vector of receive and transmit rings.

Signed-off-by: Alexander Loktionov <Alexander.Loktionov@aquantia.com>
Signed-off-by: Dmitrii Tarakanov <Dmitrii.Tarakanov@aquantia.com>
Signed-off-by: Pavel.Belous <Pavel.Belous@aquantia.com>
Signed-off-by: Dmitry Bezrukov <Dmitry.Bezrukov@aquantia.com>
Signed-off-by: David M. VomLehn <vomlehn@texas.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/aquantia/atlantic/aq_vec.c [new file with mode: 0644]
drivers/net/ethernet/aquantia/atlantic/aq_vec.h [new file with mode: 0644]

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_vec.c b/drivers/net/ethernet/aquantia/atlantic/aq_vec.c
new file mode 100644 (file)
index 0000000..140962f
--- /dev/null
@@ -0,0 +1,392 @@
+/*
+ * aQuantia Corporation Network Driver
+ * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+/* File aq_vec.c: Definition of common structure for vector of Rx and Tx rings.
+ * Definition of functions for Rx and Tx rings. Friendly module for aq_nic.
+ */
+
+#include "aq_vec.h"
+#include "aq_nic.h"
+#include "aq_ring.h"
+#include "aq_hw.h"
+
+#include <linux/netdevice.h>
+
+struct aq_vec_s {
+       struct aq_obj_s header;
+       struct aq_hw_ops *aq_hw_ops;
+       struct aq_hw_s *aq_hw;
+       struct aq_nic_s *aq_nic;
+       unsigned int tx_rings;
+       unsigned int rx_rings;
+       struct aq_ring_param_s aq_ring_param;
+       struct napi_struct napi;
+       struct aq_ring_s ring[AQ_CFG_TCS_MAX][2];
+};
+
+#define AQ_VEC_TX_ID 0
+#define AQ_VEC_RX_ID 1
+
+static int aq_vec_poll(struct napi_struct *napi, int budget)
+__releases(&self->lock)
+__acquires(&self->lock)
+{
+       struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);
+       struct aq_ring_s *ring = NULL;
+       int work_done = 0;
+       int err = 0;
+       unsigned int i = 0U;
+       unsigned int sw_tail_old = 0U;
+       bool was_tx_cleaned = false;
+
+       if (!self) {
+               err = -EINVAL;
+       } else if (spin_trylock(&self->header.lock)) {
+               for (i = 0U, ring = self->ring[0];
+                       self->tx_rings > i; ++i, ring = self->ring[i]) {
+                       if (self->aq_hw_ops->hw_ring_tx_head_update) {
+                               err = self->aq_hw_ops->hw_ring_tx_head_update(
+                                                       self->aq_hw,
+                                                       &ring[AQ_VEC_TX_ID]);
+                               if (err < 0)
+                                       goto err_exit;
+                       }
+
+                       if (ring[AQ_VEC_TX_ID].sw_head !=
+                               ring[AQ_VEC_TX_ID].hw_head) {
+                               err = aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
+                               if (err < 0)
+                                       goto err_exit;
+                               was_tx_cleaned = true;
+                       }
+
+                       err = self->aq_hw_ops->hw_ring_rx_receive(self->aq_hw,
+                                           &ring[AQ_VEC_RX_ID]);
+                       if (err < 0)
+                               goto err_exit;
+
+                       if (ring[AQ_VEC_RX_ID].sw_head !=
+                               ring[AQ_VEC_RX_ID].hw_head) {
+                               err = aq_ring_rx_clean(&ring[AQ_VEC_RX_ID],
+                                                      &work_done,
+                                                      budget - work_done);
+                               if (err < 0)
+                                       goto err_exit;
+
+                               sw_tail_old = ring[AQ_VEC_RX_ID].sw_tail;
+
+                               err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
+                               if (err < 0)
+                                       goto err_exit;
+
+                               err = self->aq_hw_ops->hw_ring_rx_fill(
+                                       self->aq_hw,
+                                       &ring[AQ_VEC_RX_ID], sw_tail_old);
+                               if (err < 0)
+                                       goto err_exit;
+                       }
+               }
+
+               if (was_tx_cleaned)
+                       work_done = budget;
+
+               if (work_done < budget) {
+                       napi_complete(napi);
+                       self->aq_hw_ops->hw_irq_enable(self->aq_hw,
+                                       1U << self->aq_ring_param.vec_idx);
+               }
+
+err_exit:
+               spin_unlock(&self->header.lock);
+       }
+
+       return work_done;
+}
+
+struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
+                             struct aq_nic_cfg_s *aq_nic_cfg)
+{
+       struct aq_vec_s *self = NULL;
+       struct aq_ring_s *ring = NULL;
+       unsigned int i = 0U;
+       int err = 0;
+
+       self = kzalloc(sizeof(*self), GFP_KERNEL);
+       if (!self) {
+               err = -ENOMEM;
+               goto err_exit;
+       }
+
+       self->aq_nic = aq_nic;
+       self->aq_ring_param.vec_idx = idx;
+       self->aq_ring_param.cpu =
+               idx + aq_nic_cfg->aq_rss.base_cpu_number;
+
+       cpumask_set_cpu(self->aq_ring_param.cpu,
+                       &self->aq_ring_param.affinity_mask);
+
+       self->tx_rings = 0;
+       self->rx_rings = 0;
+
+       netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi,
+                      aq_vec_poll, AQ_CFG_NAPI_WEIGHT);
+
+       for (i = 0; i < aq_nic_cfg->tcs; ++i) {
+               unsigned int idx_ring = AQ_NIC_TCVEC2RING(self->nic,
+                                               self->tx_rings,
+                                               self->aq_ring_param.vec_idx);
+
+               ring = aq_ring_tx_alloc(&self->ring[i][AQ_VEC_TX_ID], aq_nic,
+                                       idx_ring, aq_nic_cfg);
+               if (!ring) {
+                       err = -ENOMEM;
+                       goto err_exit;
+               }
+
+               ++self->tx_rings;
+
+               aq_nic_set_tx_ring(aq_nic, idx_ring, ring);
+
+               ring = aq_ring_rx_alloc(&self->ring[i][AQ_VEC_RX_ID], aq_nic,
+                                       idx_ring, aq_nic_cfg);
+               if (!ring) {
+                       err = -ENOMEM;
+                       goto err_exit;
+               }
+
+               ++self->rx_rings;
+       }
+
+err_exit:
+       if (err < 0) {
+               aq_vec_free(self);
+               self = NULL;
+       }
+       return self;
+}
+
+int aq_vec_init(struct aq_vec_s *self, struct aq_hw_ops *aq_hw_ops,
+               struct aq_hw_s *aq_hw)
+{
+       struct aq_ring_s *ring = NULL;
+       unsigned int i = 0U;
+       int err = 0;
+
+       self->aq_hw_ops = aq_hw_ops;
+       self->aq_hw = aq_hw;
+
+       spin_lock_init(&self->header.lock);
+
+       for (i = 0U, ring = self->ring[0];
+               self->tx_rings > i; ++i, ring = self->ring[i]) {
+               err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
+               if (err < 0)
+                       goto err_exit;
+
+               err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
+                                                      &ring[AQ_VEC_TX_ID],
+                                                      &self->aq_ring_param);
+               if (err < 0)
+                       goto err_exit;
+
+               err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
+               if (err < 0)
+                       goto err_exit;
+
+               err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
+                                                      &ring[AQ_VEC_RX_ID],
+                                                      &self->aq_ring_param);
+               if (err < 0)
+                       goto err_exit;
+
+               err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
+               if (err < 0)
+                       goto err_exit;
+
+               err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
+                                                      &ring[AQ_VEC_RX_ID], 0U);
+               if (err < 0)
+                       goto err_exit;
+       }
+
+err_exit:
+       return err;
+}
+
+int aq_vec_start(struct aq_vec_s *self)
+{
+       struct aq_ring_s *ring = NULL;
+       unsigned int i = 0U;
+       int err = 0;
+
+       for (i = 0U, ring = self->ring[0];
+               self->tx_rings > i; ++i, ring = self->ring[i]) {
+               err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
+                                                       &ring[AQ_VEC_TX_ID]);
+               if (err < 0)
+                       goto err_exit;
+
+               err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
+                                                       &ring[AQ_VEC_RX_ID]);
+               if (err < 0)
+                       goto err_exit;
+       }
+
+       napi_enable(&self->napi);
+
+err_exit:
+       return err;
+}
+
+void aq_vec_stop(struct aq_vec_s *self)
+{
+       struct aq_ring_s *ring = NULL;
+       unsigned int i = 0U;
+
+       for (i = 0U, ring = self->ring[0];
+               self->tx_rings > i; ++i, ring = self->ring[i]) {
+               self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
+                                                &ring[AQ_VEC_TX_ID]);
+
+               self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
+                                                &ring[AQ_VEC_RX_ID]);
+       }
+
+       napi_disable(&self->napi);
+}
+
+void aq_vec_deinit(struct aq_vec_s *self)
+{
+       struct aq_ring_s *ring = NULL;
+       unsigned int i = 0U;
+
+       if (!self)
+               goto err_exit;
+
+       for (i = 0U, ring = self->ring[0];
+               self->tx_rings > i; ++i, ring = self->ring[i]) {
+               aq_ring_tx_deinit(&ring[AQ_VEC_TX_ID]);
+               aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
+       }
+err_exit:;
+}
+
+void aq_vec_free(struct aq_vec_s *self)
+{
+       struct aq_ring_s *ring = NULL;
+       unsigned int i = 0U;
+
+       if (!self)
+               goto err_exit;
+
+       for (i = 0U, ring = self->ring[0];
+               self->tx_rings > i; ++i, ring = self->ring[i]) {
+               aq_ring_free(&ring[AQ_VEC_TX_ID]);
+               aq_ring_free(&ring[AQ_VEC_RX_ID]);
+       }
+
+       netif_napi_del(&self->napi);
+
+       kfree(self);
+
+err_exit:;
+}
+
+irqreturn_t aq_vec_isr(int irq, void *private)
+{
+       struct aq_vec_s *self = private;
+       int err = 0;
+
+       if (!self) {
+               err = -EINVAL;
+               goto err_exit;
+       }
+       napi_schedule(&self->napi);
+
+err_exit:
+       return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
+}
+
+irqreturn_t aq_vec_isr_legacy(int irq, void *private)
+{
+       struct aq_vec_s *self = private;
+       u64 irq_mask = 0U;
+       irqreturn_t err = 0;
+
+       if (!self) {
+               err = -EINVAL;
+               goto err_exit;
+       }
+       err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
+       if (err < 0)
+               goto err_exit;
+
+       if (irq_mask) {
+               self->aq_hw_ops->hw_irq_disable(self->aq_hw,
+                             1U << self->aq_ring_param.vec_idx);
+               napi_schedule(&self->napi);
+       } else {
+               self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
+               err = IRQ_NONE;
+       }
+
+err_exit:
+       return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
+}
+
+cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)
+{
+       return &self->aq_ring_param.affinity_mask;
+}
+
+void aq_vec_add_stats(struct aq_vec_s *self,
+                     struct aq_ring_stats_rx_s *stats_rx,
+                     struct aq_ring_stats_tx_s *stats_tx)
+{
+       struct aq_ring_s *ring = NULL;
+       unsigned int r = 0U;
+
+       for (r = 0U, ring = self->ring[0];
+               self->tx_rings > r; ++r, ring = self->ring[r]) {
+               struct aq_ring_stats_tx_s *tx = &ring[AQ_VEC_TX_ID].stats.tx;
+               struct aq_ring_stats_rx_s *rx = &ring[AQ_VEC_RX_ID].stats.rx;
+
+               stats_rx->packets += rx->packets;
+               stats_rx->bytes += rx->bytes;
+               stats_rx->errors += rx->errors;
+               stats_rx->jumbo_packets += rx->jumbo_packets;
+               stats_rx->lro_packets += rx->lro_packets;
+
+               stats_tx->packets += tx->packets;
+               stats_tx->bytes += tx->bytes;
+               stats_tx->errors += tx->errors;
+       }
+}
+
+int aq_vec_get_sw_stats(struct aq_vec_s *self, u64 *data, unsigned int *p_count)
+{
+       unsigned int count = 0U;
+       struct aq_ring_stats_rx_s stats_rx;
+       struct aq_ring_stats_tx_s stats_tx;
+
+       memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
+       memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
+       aq_vec_add_stats(self, &stats_rx, &stats_tx);
+
+       data[count] += stats_rx.packets;
+       data[++count] += stats_tx.packets;
+       data[++count] += stats_rx.jumbo_packets;
+       data[++count] += stats_rx.lro_packets;
+       data[++count] += stats_rx.errors;
+
+       if (p_count)
+               *p_count = ++count;
+
+       return 0;
+}
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_vec.h b/drivers/net/ethernet/aquantia/atlantic/aq_vec.h
new file mode 100644 (file)
index 0000000..6c68b18
--- /dev/null
@@ -0,0 +1,42 @@
+/*
+ * aQuantia Corporation Network Driver
+ * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+/* File aq_vec.h: Definition of common structures for vector of Rx and Tx rings.
+ * Declaration of functions for Rx and Tx rings.
+ */
+
+#ifndef AQ_VEC_H
+#define AQ_VEC_H
+
+#include "aq_common.h"
+#include <linux/irqreturn.h>
+
+struct aq_hw_s;
+struct aq_hw_ops;
+struct aq_ring_stats_rx_s;
+struct aq_ring_stats_tx_s;
+
+irqreturn_t aq_vec_isr(int irq, void *private);
+irqreturn_t aq_vec_isr_legacy(int irq, void *private);
+struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
+                             struct aq_nic_cfg_s *aq_nic_cfg);
+int aq_vec_init(struct aq_vec_s *self, struct aq_hw_ops *aq_hw_ops,
+               struct aq_hw_s *aq_hw);
+void aq_vec_deinit(struct aq_vec_s *self);
+void aq_vec_free(struct aq_vec_s *self);
+int aq_vec_start(struct aq_vec_s *self);
+void aq_vec_stop(struct aq_vec_s *self);
+cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self);
+int aq_vec_get_sw_stats(struct aq_vec_s *self, u64 *data,
+                       unsigned int *p_count);
+void aq_vec_add_stats(struct aq_vec_s *self,
+                     struct aq_ring_stats_rx_s *stats_rx,
+                     struct aq_ring_stats_tx_s *stats_tx);
+
+#endif /* AQ_VEC_H */