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         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];
  31 };
  32
  33 #define AQ_VEC_TX_ID 0
  34 #define AQ_VEC_RX_ID 1
  35
  36 static int aq_vec_poll(struct napi_struct *napi, int budget)
  37 __releases(&self->lock)
  38 __acquires(&self->lock)
  39 {
  40         struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);
  41         struct aq_ring_s *ring = NULL;
  42         int work_done = 0;
  43         int err = 0;
  44         unsigned int i = 0U;
  45         unsigned int sw_tail_old = 0U;
  46         bool was_tx_cleaned = false;
  47
  48         if (!self) {
  49                 err = -EINVAL;
  50         } else if (spin_trylock(&self->header.lock)) {
  51                 for (i = 0U, ring = self->ring[0];
  52                         self->tx_rings > i; ++i, ring = self->ring[i]) {
  53                         if (self->aq_hw_ops->hw_ring_tx_head_update) {
  54                                 err = self->aq_hw_ops->hw_ring_tx_head_update(
  55                                                         self->aq_hw,
  56                                                         &ring[AQ_VEC_TX_ID]);
  57                                 if (err < 0)
  58                                         goto err_exit;
  59                         }
  60
  61                         if (ring[AQ_VEC_TX_ID].sw_head !=
  62                             ring[AQ_VEC_TX_ID].hw_head) {
  63                                 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
  64
  65                                 if (aq_ring_avail_dx(&ring[AQ_VEC_TX_ID]) >
  66                                     AQ_CFG_SKB_FRAGS_MAX) {
  67                                         aq_nic_ndev_queue_start(self->aq_nic,
  68                                                 ring[AQ_VEC_TX_ID].idx);
  69                                 }
  70                                 was_tx_cleaned = true;
  71                         }
  72
  73                         err = self->aq_hw_ops->hw_ring_rx_receive(self->aq_hw,
  74                                             &ring[AQ_VEC_RX_ID]);
  75                         if (err < 0)
  76                                 goto err_exit;
  77
  78                         if (ring[AQ_VEC_RX_ID].sw_head !=
  79                                 ring[AQ_VEC_RX_ID].hw_head) {
  80                                 err = aq_ring_rx_clean(&ring[AQ_VEC_RX_ID],
  81                                                        &work_done,
  82                                                        budget - work_done);
  83                                 if (err < 0)
  84                                         goto err_exit;
  85
  86                                 sw_tail_old = ring[AQ_VEC_RX_ID].sw_tail;
  87
  88                                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
  89                                 if (err < 0)
  90                                         goto err_exit;
  91
  92                                 err = self->aq_hw_ops->hw_ring_rx_fill(
  93                                         self->aq_hw,
  94                                         &ring[AQ_VEC_RX_ID], sw_tail_old);
  95                                 if (err < 0)
  96                                         goto err_exit;
  97                         }
  98                 }
  99
 100                 if (was_tx_cleaned)
 101                         work_done = budget;
 102
 103                 if (work_done < budget) {
 104                         napi_complete_done(napi, work_done);
 105                         self->aq_hw_ops->hw_irq_enable(self->aq_hw,
 106                                         1U << self->aq_ring_param.vec_idx);
 107                 }
 108
 109 err_exit:
 110                 spin_unlock(&self->header.lock);
 111         }
 112
 113         return work_done;
 114 }
 115
 116 struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
 117                               struct aq_nic_cfg_s *aq_nic_cfg)
 118 {
 119         struct aq_vec_s *self = NULL;
 120         struct aq_ring_s *ring = NULL;
 121         unsigned int i = 0U;
 122         int err = 0;
 123
 124         self = kzalloc(sizeof(*self), GFP_KERNEL);
 125         if (!self) {
 126                 err = -ENOMEM;
 127                 goto err_exit;
 128         }
 129
 130         self->aq_nic = aq_nic;
 131         self->aq_ring_param.vec_idx = idx;
 132         self->aq_ring_param.cpu =
 133                 idx + aq_nic_cfg->aq_rss.base_cpu_number;
 134
 135         cpumask_set_cpu(self->aq_ring_param.cpu,
 136                         &self->aq_ring_param.affinity_mask);
 137
 138         self->tx_rings = 0;
 139         self->rx_rings = 0;
 140
 141         netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi,
 142                        aq_vec_poll, AQ_CFG_NAPI_WEIGHT);
 143
 144         for (i = 0; i < aq_nic_cfg->tcs; ++i) {
 145                 unsigned int idx_ring = AQ_NIC_TCVEC2RING(self->nic,
 146                                                 self->tx_rings,
 147                                                 self->aq_ring_param.vec_idx);
 148
 149                 ring = aq_ring_tx_alloc(&self->ring[i][AQ_VEC_TX_ID], aq_nic,
 150                                         idx_ring, aq_nic_cfg);
 151                 if (!ring) {
 152                         err = -ENOMEM;
 153                         goto err_exit;
 154                 }
 155
 156                 ++self->tx_rings;
 157
 158                 aq_nic_set_tx_ring(aq_nic, idx_ring, ring);
 159
 160                 ring = aq_ring_rx_alloc(&self->ring[i][AQ_VEC_RX_ID], aq_nic,
 161                                         idx_ring, aq_nic_cfg);
 162                 if (!ring) {
 163                         err = -ENOMEM;
 164                         goto err_exit;
 165                 }
 166
 167                 ++self->rx_rings;
 168         }
 169
 170 err_exit:
 171         if (err < 0) {
 172                 aq_vec_free(self);
 173                 self = NULL;
 174         }
 175         return self;
 176 }
 177
 178 int aq_vec_init(struct aq_vec_s *self, struct aq_hw_ops *aq_hw_ops,
 179                 struct aq_hw_s *aq_hw)
 180 {
 181         struct aq_ring_s *ring = NULL;
 182         unsigned int i = 0U;
 183         int err = 0;
 184
 185         self->aq_hw_ops = aq_hw_ops;
 186         self->aq_hw = aq_hw;
 187
 188         spin_lock_init(&self->header.lock);
 189
 190         for (i = 0U, ring = self->ring[0];
 191                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 192                 err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
 193                 if (err < 0)
 194                         goto err_exit;
 195
 196                 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
 197                                                        &ring[AQ_VEC_TX_ID],
 198                                                        &self->aq_ring_param);
 199                 if (err < 0)
 200                         goto err_exit;
 201
 202                 err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
 203                 if (err < 0)
 204                         goto err_exit;
 205
 206                 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
 207                                                        &ring[AQ_VEC_RX_ID],
 208                                                        &self->aq_ring_param);
 209                 if (err < 0)
 210                         goto err_exit;
 211
 212                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
 213                 if (err < 0)
 214                         goto err_exit;
 215
 216                 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
 217                                                        &ring[AQ_VEC_RX_ID], 0U);
 218                 if (err < 0)
 219                         goto err_exit;
 220         }
 221
 222 err_exit:
 223         return err;
 224 }
 225
 226 int aq_vec_start(struct aq_vec_s *self)
 227 {
 228         struct aq_ring_s *ring = NULL;
 229         unsigned int i = 0U;
 230         int err = 0;
 231
 232         for (i = 0U, ring = self->ring[0];
 233                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 234                 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
 235                                                         &ring[AQ_VEC_TX_ID]);
 236                 if (err < 0)
 237                         goto err_exit;
 238
 239                 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
 240                                                         &ring[AQ_VEC_RX_ID]);
 241                 if (err < 0)
 242                         goto err_exit;
 243         }
 244
 245         napi_enable(&self->napi);
 246
 247 err_exit:
 248         return err;
 249 }
 250
 251 void aq_vec_stop(struct aq_vec_s *self)
 252 {
 253         struct aq_ring_s *ring = NULL;
 254         unsigned int i = 0U;
 255
 256         for (i = 0U, ring = self->ring[0];
 257                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 258                 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
 259                                                  &ring[AQ_VEC_TX_ID]);
 260
 261                 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
 262                                                  &ring[AQ_VEC_RX_ID]);
 263         }
 264
 265         napi_disable(&self->napi);
 266 }
 267
 268 void aq_vec_deinit(struct aq_vec_s *self)
 269 {
 270         struct aq_ring_s *ring = NULL;
 271         unsigned int i = 0U;
 272
 273         if (!self)
 274                 goto err_exit;
 275
 276         for (i = 0U, ring = self->ring[0];
 277                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 278                 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
 279                 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
 280         }
 281 err_exit:;
 282 }
 283
 284 void aq_vec_free(struct aq_vec_s *self)
 285 {
 286         struct aq_ring_s *ring = NULL;
 287         unsigned int i = 0U;
 288
 289         if (!self)
 290                 goto err_exit;
 291
 292         for (i = 0U, ring = self->ring[0];
 293                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 294                 aq_ring_free(&ring[AQ_VEC_TX_ID]);
 295                 aq_ring_free(&ring[AQ_VEC_RX_ID]);
 296         }
 297
 298         netif_napi_del(&self->napi);
 299
 300         kfree(self);
 301
 302 err_exit:;
 303 }
 304
 305 irqreturn_t aq_vec_isr(int irq, void *private)
 306 {
 307         struct aq_vec_s *self = private;
 308         int err = 0;
 309
 310         if (!self) {
 311                 err = -EINVAL;
 312                 goto err_exit;
 313         }
 314         napi_schedule(&self->napi);
 315
 316 err_exit:
 317         return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
 318 }
 319
 320 irqreturn_t aq_vec_isr_legacy(int irq, void *private)
 321 {
 322         struct aq_vec_s *self = private;
 323         u64 irq_mask = 0U;
 324         irqreturn_t err = 0;
 325
 326         if (!self) {
 327                 err = -EINVAL;
 328                 goto err_exit;
 329         }
 330         err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
 331         if (err < 0)
 332                 goto err_exit;
 333
 334         if (irq_mask) {
 335                 self->aq_hw_ops->hw_irq_disable(self->aq_hw,
 336                               1U << self->aq_ring_param.vec_idx);
 337                 napi_schedule(&self->napi);
 338         } else {
 339                 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
 340                 err = IRQ_NONE;
 341         }
 342
 343 err_exit:
 344         return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
 345 }
 346
 347 cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)
 348 {
 349         return &self->aq_ring_param.affinity_mask;
 350 }
 351
 352 void aq_vec_add_stats(struct aq_vec_s *self,
 353                       struct aq_ring_stats_rx_s *stats_rx,
 354                       struct aq_ring_stats_tx_s *stats_tx)
 355 {
 356         struct aq_ring_s *ring = NULL;
 357         unsigned int r = 0U;
 358
 359         for (r = 0U, ring = self->ring[0];
 360                 self->tx_rings > r; ++r, ring = self->ring[r]) {
 361                 struct aq_ring_stats_tx_s *tx = &ring[AQ_VEC_TX_ID].stats.tx;
 362                 struct aq_ring_stats_rx_s *rx = &ring[AQ_VEC_RX_ID].stats.rx;
 363
 364                 stats_rx->packets += rx->packets;
 365                 stats_rx->bytes += rx->bytes;
 366                 stats_rx->errors += rx->errors;
 367                 stats_rx->jumbo_packets += rx->jumbo_packets;
 368                 stats_rx->lro_packets += rx->lro_packets;
 369
 370                 stats_tx->packets += tx->packets;
 371                 stats_tx->bytes += tx->bytes;
 372                 stats_tx->errors += tx->errors;
 373         }
 374 }
 375
 376 int aq_vec_get_sw_stats(struct aq_vec_s *self, u64 *data, unsigned int *p_count)
 377 {
 378         unsigned int count = 0U;
 379         struct aq_ring_stats_rx_s stats_rx;
 380         struct aq_ring_stats_tx_s stats_tx;
 381
 382         memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
 383         memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
 384         aq_vec_add_stats(self, &stats_rx, &stats_tx);
 385
 386         data[count] += stats_rx.packets;
 387         data[++count] += stats_tx.packets;
 388         data[++count] += stats_rx.jumbo_packets;
 389         data[++count] += stats_rx.lro_packets;
 390         data[++count] += stats_rx.errors;
 391
 392         if (p_count)
 393                 *p_count = ++count;
 394
 395         return 0;
 396 }