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 const struct aq_hw_ops *aq_hw_ops;
23 struct aq_hw_s *aq_hw;
24 struct aq_nic_s *aq_nic;
25 unsigned int tx_rings;
26 unsigned int rx_rings;
27 struct aq_ring_param_s aq_ring_param;
28 struct napi_struct napi;
29 struct aq_ring_s ring[AQ_CFG_TCS_MAX][2];
32 #define AQ_VEC_TX_ID 0
33 #define AQ_VEC_RX_ID 1
35 static int aq_vec_poll(struct napi_struct *napi, int budget)
37 struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);
38 struct aq_ring_s *ring = NULL;
42 unsigned int sw_tail_old = 0U;
43 bool was_tx_cleaned = false;
48 for (i = 0U, ring = self->ring[0];
49 self->tx_rings > i; ++i, ring = self->ring[i]) {
50 if (self->aq_hw_ops->hw_ring_tx_head_update) {
51 err = self->aq_hw_ops->hw_ring_tx_head_update(
58 if (ring[AQ_VEC_TX_ID].sw_head !=
59 ring[AQ_VEC_TX_ID].hw_head) {
60 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
61 aq_ring_update_queue_state(&ring[AQ_VEC_TX_ID]);
62 was_tx_cleaned = true;
65 err = self->aq_hw_ops->hw_ring_rx_receive(self->aq_hw,
70 if (ring[AQ_VEC_RX_ID].sw_head !=
71 ring[AQ_VEC_RX_ID].hw_head) {
72 err = aq_ring_rx_clean(&ring[AQ_VEC_RX_ID],
79 sw_tail_old = ring[AQ_VEC_RX_ID].sw_tail;
81 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
85 err = self->aq_hw_ops->hw_ring_rx_fill(
87 &ring[AQ_VEC_RX_ID], sw_tail_old);
96 if (work_done < budget) {
97 napi_complete_done(napi, work_done);
98 self->aq_hw_ops->hw_irq_enable(self->aq_hw,
99 1U << self->aq_ring_param.vec_idx);
106 struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
107 struct aq_nic_cfg_s *aq_nic_cfg)
109 struct aq_vec_s *self = NULL;
110 struct aq_ring_s *ring = NULL;
114 self = kzalloc(sizeof(*self), GFP_KERNEL);
120 self->aq_nic = aq_nic;
121 self->aq_ring_param.vec_idx = idx;
122 self->aq_ring_param.cpu =
123 idx + aq_nic_cfg->aq_rss.base_cpu_number;
125 cpumask_set_cpu(self->aq_ring_param.cpu,
126 &self->aq_ring_param.affinity_mask);
131 netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi,
132 aq_vec_poll, AQ_CFG_NAPI_WEIGHT);
134 for (i = 0; i < aq_nic_cfg->tcs; ++i) {
135 unsigned int idx_ring = AQ_NIC_TCVEC2RING(self->nic,
137 self->aq_ring_param.vec_idx);
139 ring = aq_ring_tx_alloc(&self->ring[i][AQ_VEC_TX_ID], aq_nic,
140 idx_ring, aq_nic_cfg);
148 aq_nic_set_tx_ring(aq_nic, idx_ring, ring);
150 ring = aq_ring_rx_alloc(&self->ring[i][AQ_VEC_RX_ID], aq_nic,
151 idx_ring, aq_nic_cfg);
168 int aq_vec_init(struct aq_vec_s *self, const struct aq_hw_ops *aq_hw_ops,
169 struct aq_hw_s *aq_hw)
171 struct aq_ring_s *ring = NULL;
175 self->aq_hw_ops = aq_hw_ops;
178 for (i = 0U, ring = self->ring[0];
179 self->tx_rings > i; ++i, ring = self->ring[i]) {
180 err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
184 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
186 &self->aq_ring_param);
190 err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
194 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
196 &self->aq_ring_param);
200 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
204 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
205 &ring[AQ_VEC_RX_ID], 0U);
214 int aq_vec_start(struct aq_vec_s *self)
216 struct aq_ring_s *ring = NULL;
220 for (i = 0U, ring = self->ring[0];
221 self->tx_rings > i; ++i, ring = self->ring[i]) {
222 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
223 &ring[AQ_VEC_TX_ID]);
227 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
228 &ring[AQ_VEC_RX_ID]);
233 napi_enable(&self->napi);
239 void aq_vec_stop(struct aq_vec_s *self)
241 struct aq_ring_s *ring = NULL;
244 for (i = 0U, ring = self->ring[0];
245 self->tx_rings > i; ++i, ring = self->ring[i]) {
246 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
247 &ring[AQ_VEC_TX_ID]);
249 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
250 &ring[AQ_VEC_RX_ID]);
253 napi_disable(&self->napi);
256 void aq_vec_deinit(struct aq_vec_s *self)
258 struct aq_ring_s *ring = NULL;
264 for (i = 0U, ring = self->ring[0];
265 self->tx_rings > i; ++i, ring = self->ring[i]) {
266 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
267 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
272 void aq_vec_free(struct aq_vec_s *self)
274 struct aq_ring_s *ring = NULL;
280 for (i = 0U, ring = self->ring[0];
281 self->tx_rings > i; ++i, ring = self->ring[i]) {
282 aq_ring_free(&ring[AQ_VEC_TX_ID]);
283 aq_ring_free(&ring[AQ_VEC_RX_ID]);
286 netif_napi_del(&self->napi);
293 irqreturn_t aq_vec_isr(int irq, void *private)
295 struct aq_vec_s *self = private;
302 napi_schedule(&self->napi);
305 return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
308 irqreturn_t aq_vec_isr_legacy(int irq, void *private)
310 struct aq_vec_s *self = private;
318 err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
323 self->aq_hw_ops->hw_irq_disable(self->aq_hw,
324 1U << self->aq_ring_param.vec_idx);
325 napi_schedule(&self->napi);
327 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
332 return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
335 cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)
337 return &self->aq_ring_param.affinity_mask;
340 void aq_vec_add_stats(struct aq_vec_s *self,
341 struct aq_ring_stats_rx_s *stats_rx,
342 struct aq_ring_stats_tx_s *stats_tx)
344 struct aq_ring_s *ring = NULL;
347 for (r = 0U, ring = self->ring[0];
348 self->tx_rings > r; ++r, ring = self->ring[r]) {
349 struct aq_ring_stats_tx_s *tx = &ring[AQ_VEC_TX_ID].stats.tx;
350 struct aq_ring_stats_rx_s *rx = &ring[AQ_VEC_RX_ID].stats.rx;
352 stats_rx->packets += rx->packets;
353 stats_rx->bytes += rx->bytes;
354 stats_rx->errors += rx->errors;
355 stats_rx->jumbo_packets += rx->jumbo_packets;
356 stats_rx->lro_packets += rx->lro_packets;
358 stats_tx->packets += tx->packets;
359 stats_tx->bytes += tx->bytes;
360 stats_tx->errors += tx->errors;
361 stats_tx->queue_restarts += tx->queue_restarts;
365 int aq_vec_get_sw_stats(struct aq_vec_s *self, u64 *data, unsigned int *p_count)
367 unsigned int count = 0U;
368 struct aq_ring_stats_rx_s stats_rx;
369 struct aq_ring_stats_tx_s stats_tx;
371 memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
372 memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
373 aq_vec_add_stats(self, &stats_rx, &stats_tx);
375 /* This data should mimic aq_ethtool_queue_stat_names structure
377 data[count] += stats_rx.packets;
378 data[++count] += stats_tx.packets;
379 data[++count] += stats_tx.queue_restarts;
380 data[++count] += stats_rx.jumbo_packets;
381 data[++count] += stats_rx.lro_packets;
382 data[++count] += stats_rx.errors;