2 * aQuantia Corporation Network Driver
3 * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
10 /* File aq_vec.c: Definition of common structure for vector of Rx and Tx rings.
11 * Definition of functions for Rx and Tx rings. Friendly module for aq_nic.
19 #include <linux/netdevice.h>
22 struct aq_obj_s header;
23 struct aq_hw_ops *aq_hw_ops;
24 struct aq_hw_s *aq_hw;
25 struct aq_nic_s *aq_nic;
26 unsigned int tx_rings;
27 unsigned int rx_rings;
28 struct aq_ring_param_s aq_ring_param;
29 struct napi_struct napi;
30 struct aq_ring_s ring[AQ_CFG_TCS_MAX][2];
33 #define AQ_VEC_TX_ID 0
34 #define AQ_VEC_RX_ID 1
36 static int aq_vec_poll(struct napi_struct *napi, int budget)
38 struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);
39 struct aq_ring_s *ring = NULL;
43 unsigned int sw_tail_old = 0U;
44 bool was_tx_cleaned = false;
49 for (i = 0U, ring = self->ring[0];
50 self->tx_rings > i; ++i, ring = self->ring[i]) {
51 if (self->aq_hw_ops->hw_ring_tx_head_update) {
52 err = self->aq_hw_ops->hw_ring_tx_head_update(
59 if (ring[AQ_VEC_TX_ID].sw_head !=
60 ring[AQ_VEC_TX_ID].hw_head) {
61 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
62 aq_ring_update_queue_state(&ring[AQ_VEC_TX_ID]);
63 was_tx_cleaned = true;
66 err = self->aq_hw_ops->hw_ring_rx_receive(self->aq_hw,
71 if (ring[AQ_VEC_RX_ID].sw_head !=
72 ring[AQ_VEC_RX_ID].hw_head) {
73 err = aq_ring_rx_clean(&ring[AQ_VEC_RX_ID],
80 sw_tail_old = ring[AQ_VEC_RX_ID].sw_tail;
82 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
86 err = self->aq_hw_ops->hw_ring_rx_fill(
88 &ring[AQ_VEC_RX_ID], sw_tail_old);
97 if (work_done < budget) {
98 napi_complete_done(napi, work_done);
99 self->aq_hw_ops->hw_irq_enable(self->aq_hw,
100 1U << self->aq_ring_param.vec_idx);
107 struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
108 struct aq_nic_cfg_s *aq_nic_cfg)
110 struct aq_vec_s *self = NULL;
111 struct aq_ring_s *ring = NULL;
115 self = kzalloc(sizeof(*self), GFP_KERNEL);
121 self->aq_nic = aq_nic;
122 self->aq_ring_param.vec_idx = idx;
123 self->aq_ring_param.cpu =
124 idx + aq_nic_cfg->aq_rss.base_cpu_number;
126 cpumask_set_cpu(self->aq_ring_param.cpu,
127 &self->aq_ring_param.affinity_mask);
132 netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi,
133 aq_vec_poll, AQ_CFG_NAPI_WEIGHT);
135 for (i = 0; i < aq_nic_cfg->tcs; ++i) {
136 unsigned int idx_ring = AQ_NIC_TCVEC2RING(self->nic,
138 self->aq_ring_param.vec_idx);
140 ring = aq_ring_tx_alloc(&self->ring[i][AQ_VEC_TX_ID], aq_nic,
141 idx_ring, aq_nic_cfg);
149 aq_nic_set_tx_ring(aq_nic, idx_ring, ring);
151 ring = aq_ring_rx_alloc(&self->ring[i][AQ_VEC_RX_ID], aq_nic,
152 idx_ring, aq_nic_cfg);
169 int aq_vec_init(struct aq_vec_s *self, struct aq_hw_ops *aq_hw_ops,
170 struct aq_hw_s *aq_hw)
172 struct aq_ring_s *ring = NULL;
176 self->aq_hw_ops = aq_hw_ops;
179 for (i = 0U, ring = self->ring[0];
180 self->tx_rings > i; ++i, ring = self->ring[i]) {
181 err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
185 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
187 &self->aq_ring_param);
191 err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
195 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
197 &self->aq_ring_param);
201 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
205 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
206 &ring[AQ_VEC_RX_ID], 0U);
215 int aq_vec_start(struct aq_vec_s *self)
217 struct aq_ring_s *ring = NULL;
221 for (i = 0U, ring = self->ring[0];
222 self->tx_rings > i; ++i, ring = self->ring[i]) {
223 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
224 &ring[AQ_VEC_TX_ID]);
228 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
229 &ring[AQ_VEC_RX_ID]);
234 napi_enable(&self->napi);
240 void aq_vec_stop(struct aq_vec_s *self)
242 struct aq_ring_s *ring = NULL;
245 for (i = 0U, ring = self->ring[0];
246 self->tx_rings > i; ++i, ring = self->ring[i]) {
247 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
248 &ring[AQ_VEC_TX_ID]);
250 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
251 &ring[AQ_VEC_RX_ID]);
254 napi_disable(&self->napi);
257 void aq_vec_deinit(struct aq_vec_s *self)
259 struct aq_ring_s *ring = NULL;
265 for (i = 0U, ring = self->ring[0];
266 self->tx_rings > i; ++i, ring = self->ring[i]) {
267 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
268 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
273 void aq_vec_free(struct aq_vec_s *self)
275 struct aq_ring_s *ring = NULL;
281 for (i = 0U, ring = self->ring[0];
282 self->tx_rings > i; ++i, ring = self->ring[i]) {
283 aq_ring_free(&ring[AQ_VEC_TX_ID]);
284 aq_ring_free(&ring[AQ_VEC_RX_ID]);
287 netif_napi_del(&self->napi);
294 irqreturn_t aq_vec_isr(int irq, void *private)
296 struct aq_vec_s *self = private;
303 napi_schedule(&self->napi);
306 return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
309 irqreturn_t aq_vec_isr_legacy(int irq, void *private)
311 struct aq_vec_s *self = private;
317 err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
322 self->aq_hw_ops->hw_irq_disable(self->aq_hw,
323 1U << self->aq_ring_param.vec_idx);
324 napi_schedule(&self->napi);
326 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
333 cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)
335 return &self->aq_ring_param.affinity_mask;
338 void aq_vec_add_stats(struct aq_vec_s *self,
339 struct aq_ring_stats_rx_s *stats_rx,
340 struct aq_ring_stats_tx_s *stats_tx)
342 struct aq_ring_s *ring = NULL;
345 for (r = 0U, ring = self->ring[0];
346 self->tx_rings > r; ++r, ring = self->ring[r]) {
347 struct aq_ring_stats_tx_s *tx = &ring[AQ_VEC_TX_ID].stats.tx;
348 struct aq_ring_stats_rx_s *rx = &ring[AQ_VEC_RX_ID].stats.rx;
350 stats_rx->packets += rx->packets;
351 stats_rx->bytes += rx->bytes;
352 stats_rx->errors += rx->errors;
353 stats_rx->jumbo_packets += rx->jumbo_packets;
354 stats_rx->lro_packets += rx->lro_packets;
356 stats_tx->packets += tx->packets;
357 stats_tx->bytes += tx->bytes;
358 stats_tx->errors += tx->errors;
359 stats_tx->queue_restarts += tx->queue_restarts;
363 int aq_vec_get_sw_stats(struct aq_vec_s *self, u64 *data, unsigned int *p_count)
365 unsigned int count = 0U;
366 struct aq_ring_stats_rx_s stats_rx;
367 struct aq_ring_stats_tx_s stats_tx;
369 memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
370 memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
371 aq_vec_add_stats(self, &stats_rx, &stats_tx);
373 /* This data should mimic aq_ethtool_queue_stat_names structure
375 data[count] += stats_rx.packets;
376 data[++count] += stats_tx.packets;
377 data[++count] += stats_tx.queue_restarts;
378 data[++count] += stats_rx.jumbo_packets;
379 data[++count] += stats_rx.lro_packets;
380 data[++count] += stats_rx.errors;