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