drivers/net/ethernet/aquantia/atlantic/aq_vec.c

   1 /*
   2  * aQuantia Corporation Network Driver
   3  * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
   4  *
   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.
   8  */
   9
  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.
  12  */
  13
  14 #include "aq_vec.h"
  15 #include "aq_nic.h"
  16 #include "aq_ring.h"
  17 #include "aq_hw.h"
  18
  19 #include <linux/netdevice.h>
  20
  21 struct aq_vec_s {
  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];
  30 };
  31
  32 #define AQ_VEC_TX_ID 0
  33 #define AQ_VEC_RX_ID 1
  34
  35 static int aq_vec_poll(struct napi_struct *napi, int budget)
  36 {
  37         struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);
  38         unsigned int sw_tail_old = 0U;
  39         struct aq_ring_s *ring = NULL;
  40         bool was_tx_cleaned = true;
  41         unsigned int i = 0U;
  42         int work_done = 0;
  43         int err = 0;
  44
  45         if (!self) {
  46                 err = -EINVAL;
  47         } else {
  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(
  52                                                         self->aq_hw,
  53                                                         &ring[AQ_VEC_TX_ID]);
  54                                 if (err < 0)
  55                                         goto err_exit;
  56                         }
  57
  58                         if (ring[AQ_VEC_TX_ID].sw_head !=
  59                             ring[AQ_VEC_TX_ID].hw_head) {
  60                                 was_tx_cleaned = aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
  61                                 aq_ring_update_queue_state(&ring[AQ_VEC_TX_ID]);
  62                         }
  63
  64                         err = self->aq_hw_ops->hw_ring_rx_receive(self->aq_hw,
  65                                             &ring[AQ_VEC_RX_ID]);
  66                         if (err < 0)
  67                                 goto err_exit;
  68
  69                         if (ring[AQ_VEC_RX_ID].sw_head !=
  70                                 ring[AQ_VEC_RX_ID].hw_head) {
  71                                 err = aq_ring_rx_clean(&ring[AQ_VEC_RX_ID],
  72                                                        napi,
  73                                                        &work_done,
  74                                                        budget - work_done);
  75                                 if (err < 0)
  76                                         goto err_exit;
  77
  78                                 sw_tail_old = ring[AQ_VEC_RX_ID].sw_tail;
  79
  80                                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
  81                                 if (err < 0)
  82                                         goto err_exit;
  83
  84                                 err = self->aq_hw_ops->hw_ring_rx_fill(
  85                                         self->aq_hw,
  86                                         &ring[AQ_VEC_RX_ID], sw_tail_old);
  87                                 if (err < 0)
  88                                         goto err_exit;
  89                         }
  90                 }
  91
  92                 if (!was_tx_cleaned)
  93                         work_done = budget;
  94
  95                 if (work_done < budget) {
  96                         napi_complete_done(napi, work_done);
  97                         self->aq_hw_ops->hw_irq_enable(self->aq_hw,
  98                                         1U << self->aq_ring_param.vec_idx);
  99                 }
 100         }
 101 err_exit:
 102         return work_done;
 103 }
 104
 105 struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
 106                               struct aq_nic_cfg_s *aq_nic_cfg)
 107 {
 108         struct aq_vec_s *self = NULL;
 109         struct aq_ring_s *ring = NULL;
 110         unsigned int i = 0U;
 111         int err = 0;
 112
 113         self = kzalloc(sizeof(*self), GFP_KERNEL);
 114         if (!self) {
 115                 err = -ENOMEM;
 116                 goto err_exit;
 117         }
 118
 119         self->aq_nic = aq_nic;
 120         self->aq_ring_param.vec_idx = idx;
 121         self->aq_ring_param.cpu =
 122                 idx + aq_nic_cfg->aq_rss.base_cpu_number;
 123
 124         cpumask_set_cpu(self->aq_ring_param.cpu,
 125                         &self->aq_ring_param.affinity_mask);
 126
 127         self->tx_rings = 0;
 128         self->rx_rings = 0;
 129
 130         netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi,
 131                        aq_vec_poll, AQ_CFG_NAPI_WEIGHT);
 132
 133         for (i = 0; i < aq_nic_cfg->tcs; ++i) {
 134                 unsigned int idx_ring = AQ_NIC_TCVEC2RING(self->nic,
 135                                                 self->tx_rings,
 136                                                 self->aq_ring_param.vec_idx);
 137
 138                 ring = aq_ring_tx_alloc(&self->ring[i][AQ_VEC_TX_ID], aq_nic,
 139                                         idx_ring, aq_nic_cfg);
 140                 if (!ring) {
 141                         err = -ENOMEM;
 142                         goto err_exit;
 143                 }
 144
 145                 ++self->tx_rings;
 146
 147                 aq_nic_set_tx_ring(aq_nic, idx_ring, ring);
 148
 149                 ring = aq_ring_rx_alloc(&self->ring[i][AQ_VEC_RX_ID], aq_nic,
 150                                         idx_ring, aq_nic_cfg);
 151                 if (!ring) {
 152                         err = -ENOMEM;
 153                         goto err_exit;
 154                 }
 155
 156                 ++self->rx_rings;
 157         }
 158
 159 err_exit:
 160         if (err < 0) {
 161                 aq_vec_free(self);
 162                 self = NULL;
 163         }
 164         return self;
 165 }
 166
 167 int aq_vec_init(struct aq_vec_s *self, const struct aq_hw_ops *aq_hw_ops,
 168                 struct aq_hw_s *aq_hw)
 169 {
 170         struct aq_ring_s *ring = NULL;
 171         unsigned int i = 0U;
 172         int err = 0;
 173
 174         self->aq_hw_ops = aq_hw_ops;
 175         self->aq_hw = aq_hw;
 176
 177         for (i = 0U, ring = self->ring[0];
 178                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 179                 err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
 180                 if (err < 0)
 181                         goto err_exit;
 182
 183                 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
 184                                                        &ring[AQ_VEC_TX_ID],
 185                                                        &self->aq_ring_param);
 186                 if (err < 0)
 187                         goto err_exit;
 188
 189                 err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
 190                 if (err < 0)
 191                         goto err_exit;
 192
 193                 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
 194                                                        &ring[AQ_VEC_RX_ID],
 195                                                        &self->aq_ring_param);
 196                 if (err < 0)
 197                         goto err_exit;
 198
 199                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
 200                 if (err < 0)
 201                         goto err_exit;
 202
 203                 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
 204                                                        &ring[AQ_VEC_RX_ID], 0U);
 205                 if (err < 0)
 206                         goto err_exit;
 207         }
 208
 209 err_exit:
 210         return err;
 211 }
 212
 213 int aq_vec_start(struct aq_vec_s *self)
 214 {
 215         struct aq_ring_s *ring = NULL;
 216         unsigned int i = 0U;
 217         int err = 0;
 218
 219         for (i = 0U, ring = self->ring[0];
 220                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 221                 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
 222                                                         &ring[AQ_VEC_TX_ID]);
 223                 if (err < 0)
 224                         goto err_exit;
 225
 226                 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
 227                                                         &ring[AQ_VEC_RX_ID]);
 228                 if (err < 0)
 229                         goto err_exit;
 230         }
 231
 232         napi_enable(&self->napi);
 233
 234 err_exit:
 235         return err;
 236 }
 237
 238 void aq_vec_stop(struct aq_vec_s *self)
 239 {
 240         struct aq_ring_s *ring = NULL;
 241         unsigned int i = 0U;
 242
 243         for (i = 0U, ring = self->ring[0];
 244                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 245                 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
 246                                                  &ring[AQ_VEC_TX_ID]);
 247
 248                 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
 249                                                  &ring[AQ_VEC_RX_ID]);
 250         }
 251
 252         napi_disable(&self->napi);
 253 }
 254
 255 void aq_vec_deinit(struct aq_vec_s *self)
 256 {
 257         struct aq_ring_s *ring = NULL;
 258         unsigned int i = 0U;
 259
 260         if (!self)
 261                 goto err_exit;
 262
 263         for (i = 0U, ring = self->ring[0];
 264                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 265                 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
 266                 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
 267         }
 268 err_exit:;
 269 }
 270
 271 void aq_vec_free(struct aq_vec_s *self)
 272 {
 273         struct aq_ring_s *ring = NULL;
 274         unsigned int i = 0U;
 275
 276         if (!self)
 277                 goto err_exit;
 278
 279         for (i = 0U, ring = self->ring[0];
 280                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 281                 aq_ring_free(&ring[AQ_VEC_TX_ID]);
 282                 aq_ring_free(&ring[AQ_VEC_RX_ID]);
 283         }
 284
 285         netif_napi_del(&self->napi);
 286
 287         kfree(self);
 288
 289 err_exit:;
 290 }
 291
 292 irqreturn_t aq_vec_isr(int irq, void *private)
 293 {
 294         struct aq_vec_s *self = private;
 295         int err = 0;
 296
 297         if (!self) {
 298                 err = -EINVAL;
 299                 goto err_exit;
 300         }
 301         napi_schedule(&self->napi);
 302
 303 err_exit:
 304         return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
 305 }
 306
 307 irqreturn_t aq_vec_isr_legacy(int irq, void *private)
 308 {
 309         struct aq_vec_s *self = private;
 310         u64 irq_mask = 0U;
 311         irqreturn_t err = 0;
 312
 313         if (!self) {
 314                 err = -EINVAL;
 315                 goto err_exit;
 316         }
 317         err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
 318         if (err < 0)
 319                 goto err_exit;
 320
 321         if (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);
 325         } else {
 326                 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
 327                 err = IRQ_NONE;
 328         }
 329
 330 err_exit:
 331         return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
 332 }
 333
 334 cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)
 335 {
 336         return &self->aq_ring_param.affinity_mask;
 337 }
 338
 339 void aq_vec_add_stats(struct aq_vec_s *self,
 340                       struct aq_ring_stats_rx_s *stats_rx,
 341                       struct aq_ring_stats_tx_s *stats_tx)
 342 {
 343         struct aq_ring_s *ring = NULL;
 344         unsigned int r = 0U;
 345
 346         for (r = 0U, ring = self->ring[0];
 347                 self->tx_rings > r; ++r, ring = self->ring[r]) {
 348                 struct aq_ring_stats_tx_s *tx = &ring[AQ_VEC_TX_ID].stats.tx;
 349                 struct aq_ring_stats_rx_s *rx = &ring[AQ_VEC_RX_ID].stats.rx;
 350
 351                 stats_rx->packets += rx->packets;
 352                 stats_rx->bytes += rx->bytes;
 353                 stats_rx->errors += rx->errors;
 354                 stats_rx->jumbo_packets += rx->jumbo_packets;
 355                 stats_rx->lro_packets += rx->lro_packets;
 356
 357                 stats_tx->packets += tx->packets;
 358                 stats_tx->bytes += tx->bytes;
 359                 stats_tx->errors += tx->errors;
 360                 stats_tx->queue_restarts += tx->queue_restarts;
 361         }
 362 }
 363
 364 int aq_vec_get_sw_stats(struct aq_vec_s *self, u64 *data, unsigned int *p_count)
 365 {
 366         unsigned int count = 0U;
 367         struct aq_ring_stats_rx_s stats_rx;
 368         struct aq_ring_stats_tx_s stats_tx;
 369
 370         memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
 371         memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
 372         aq_vec_add_stats(self, &stats_rx, &stats_tx);
 373
 374         /* This data should mimic aq_ethtool_queue_stat_names structure
 375          */
 376         data[count] += stats_rx.packets;
 377         data[++count] += stats_tx.packets;
 378         data[++count] += stats_tx.queue_restarts;
 379         data[++count] += stats_rx.jumbo_packets;
 380         data[++count] += stats_rx.lro_packets;
 381         data[++count] += stats_rx.errors;
 382
 383         if (p_count)
 384                 *p_count = ++count;
 385
 386         return 0;
 387 }