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