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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * aQuantia Corporation Network Driver
   4  * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
   5  */
   6
   7 /* File aq_vec.c: Definition of common structure for vector of Rx and Tx rings.
   8  * Definition of functions for Rx and Tx rings. Friendly module for aq_nic.
   9  */
  10
  11 #include "aq_vec.h"
  12 #include "aq_nic.h"
  13 #include "aq_ring.h"
  14 #include "aq_hw.h"
  15
  16 #include <linux/netdevice.h>
  17
  18 struct aq_vec_s {
  19         const struct aq_hw_ops *aq_hw_ops;
  20         struct aq_hw_s *aq_hw;
  21         struct aq_nic_s *aq_nic;
  22         unsigned int tx_rings;
  23         unsigned int rx_rings;
  24         struct aq_ring_param_s aq_ring_param;
  25         struct napi_struct napi;
  26         struct aq_ring_s ring[AQ_CFG_TCS_MAX][2];
  27 };
  28
  29 #define AQ_VEC_TX_ID 0
  30 #define AQ_VEC_RX_ID 1
  31
  32 static int aq_vec_poll(struct napi_struct *napi, int budget)
  33 {
  34         struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);
  35         unsigned int sw_tail_old = 0U;
  36         struct aq_ring_s *ring = NULL;
  37         bool was_tx_cleaned = true;
  38         unsigned int i = 0U;
  39         int work_done = 0;
  40         int err = 0;
  41
  42         if (!self) {
  43                 err = -EINVAL;
  44         } else {
  45                 for (i = 0U, ring = self->ring[0];
  46                         self->tx_rings > i; ++i, ring = self->ring[i]) {
  47                         if (self->aq_hw_ops->hw_ring_tx_head_update) {
  48                                 err = self->aq_hw_ops->hw_ring_tx_head_update(
  49                                                         self->aq_hw,
  50                                                         &ring[AQ_VEC_TX_ID]);
  51                                 if (err < 0)
  52                                         goto err_exit;
  53                         }
  54
  55                         if (ring[AQ_VEC_TX_ID].sw_head !=
  56                             ring[AQ_VEC_TX_ID].hw_head) {
  57                                 was_tx_cleaned = aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
  58                                 aq_ring_update_queue_state(&ring[AQ_VEC_TX_ID]);
  59                         }
  60
  61                         err = self->aq_hw_ops->hw_ring_rx_receive(self->aq_hw,
  62                                             &ring[AQ_VEC_RX_ID]);
  63                         if (err < 0)
  64                                 goto err_exit;
  65
  66                         if (ring[AQ_VEC_RX_ID].sw_head !=
  67                                 ring[AQ_VEC_RX_ID].hw_head) {
  68                                 err = aq_ring_rx_clean(&ring[AQ_VEC_RX_ID],
  69                                                        napi,
  70                                                        &work_done,
  71                                                        budget - work_done);
  72                                 if (err < 0)
  73                                         goto err_exit;
  74
  75                                 sw_tail_old = ring[AQ_VEC_RX_ID].sw_tail;
  76
  77                                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
  78                                 if (err < 0)
  79                                         goto err_exit;
  80
  81                                 err = self->aq_hw_ops->hw_ring_rx_fill(
  82                                         self->aq_hw,
  83                                         &ring[AQ_VEC_RX_ID], sw_tail_old);
  84                                 if (err < 0)
  85                                         goto err_exit;
  86                         }
  87                 }
  88
  89 err_exit:
  90                 if (!was_tx_cleaned)
  91                         work_done = budget;
  92
  93                 if (work_done < budget) {
  94                         napi_complete_done(napi, work_done);
  95                         self->aq_hw_ops->hw_irq_enable(self->aq_hw,
  96                                         1U << self->aq_ring_param.vec_idx);
  97                 }
  98         }
  99
 100         return work_done;
 101 }
 102
 103 struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
 104                               struct aq_nic_cfg_s *aq_nic_cfg)
 105 {
 106         struct aq_ring_s *ring = NULL;
 107         struct aq_vec_s *self = NULL;
 108         unsigned int i = 0U;
 109         int err = 0;
 110
 111         self = kzalloc(sizeof(*self), GFP_KERNEL);
 112         if (!self) {
 113                 err = -ENOMEM;
 114                 goto err_exit;
 115         }
 116
 117         self->aq_nic = aq_nic;
 118         self->aq_ring_param.vec_idx = idx;
 119         self->aq_ring_param.cpu =
 120                 idx + aq_nic_cfg->aq_rss.base_cpu_number;
 121
 122         cpumask_set_cpu(self->aq_ring_param.cpu,
 123                         &self->aq_ring_param.affinity_mask);
 124
 125         self->tx_rings = 0;
 126         self->rx_rings = 0;
 127
 128         netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi,
 129                        aq_vec_poll, AQ_CFG_NAPI_WEIGHT);
 130
 131         for (i = 0; i < aq_nic_cfg->tcs; ++i) {
 132                 unsigned int idx_ring = AQ_NIC_TCVEC2RING(self->nic,
 133                                                 self->tx_rings,
 134                                                 self->aq_ring_param.vec_idx);
 135
 136                 ring = aq_ring_tx_alloc(&self->ring[i][AQ_VEC_TX_ID], aq_nic,
 137                                         idx_ring, aq_nic_cfg);
 138                 if (!ring) {
 139                         err = -ENOMEM;
 140                         goto err_exit;
 141                 }
 142
 143                 ++self->tx_rings;
 144
 145                 aq_nic_set_tx_ring(aq_nic, idx_ring, ring);
 146
 147                 ring = aq_ring_rx_alloc(&self->ring[i][AQ_VEC_RX_ID], aq_nic,
 148                                         idx_ring, aq_nic_cfg);
 149                 if (!ring) {
 150                         err = -ENOMEM;
 151                         goto err_exit;
 152                 }
 153
 154                 ++self->rx_rings;
 155         }
 156
 157 err_exit:
 158         if (err < 0) {
 159                 aq_vec_free(self);
 160                 self = NULL;
 161         }
 162
 163         return self;
 164 }
 165
 166 int aq_vec_init(struct aq_vec_s *self, const struct aq_hw_ops *aq_hw_ops,
 167                 struct aq_hw_s *aq_hw)
 168 {
 169         struct aq_ring_s *ring = NULL;
 170         unsigned int i = 0U;
 171         int err = 0;
 172
 173         self->aq_hw_ops = aq_hw_ops;
 174         self->aq_hw = aq_hw;
 175
 176         for (i = 0U, ring = self->ring[0];
 177                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 178                 err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
 179                 if (err < 0)
 180                         goto err_exit;
 181
 182                 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
 183                                                        &ring[AQ_VEC_TX_ID],
 184                                                        &self->aq_ring_param);
 185                 if (err < 0)
 186                         goto err_exit;
 187
 188                 err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
 189                 if (err < 0)
 190                         goto err_exit;
 191
 192                 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
 193                                                        &ring[AQ_VEC_RX_ID],
 194                                                        &self->aq_ring_param);
 195                 if (err < 0)
 196                         goto err_exit;
 197
 198                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
 199                 if (err < 0)
 200                         goto err_exit;
 201
 202                 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
 203                                                        &ring[AQ_VEC_RX_ID], 0U);
 204                 if (err < 0)
 205                         goto err_exit;
 206         }
 207
 208 err_exit:
 209         return err;
 210 }
 211
 212 int aq_vec_start(struct aq_vec_s *self)
 213 {
 214         struct aq_ring_s *ring = NULL;
 215         unsigned int i = 0U;
 216         int err = 0;
 217
 218         for (i = 0U, ring = self->ring[0];
 219                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 220                 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
 221                                                         &ring[AQ_VEC_TX_ID]);
 222                 if (err < 0)
 223                         goto err_exit;
 224
 225                 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
 226                                                         &ring[AQ_VEC_RX_ID]);
 227                 if (err < 0)
 228                         goto err_exit;
 229         }
 230
 231         napi_enable(&self->napi);
 232
 233 err_exit:
 234         return err;
 235 }
 236
 237 void aq_vec_stop(struct aq_vec_s *self)
 238 {
 239         struct aq_ring_s *ring = NULL;
 240         unsigned int i = 0U;
 241
 242         for (i = 0U, ring = self->ring[0];
 243                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 244                 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
 245                                                  &ring[AQ_VEC_TX_ID]);
 246
 247                 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
 248                                                  &ring[AQ_VEC_RX_ID]);
 249         }
 250
 251         napi_disable(&self->napi);
 252 }
 253
 254 void aq_vec_deinit(struct aq_vec_s *self)
 255 {
 256         struct aq_ring_s *ring = NULL;
 257         unsigned int i = 0U;
 258
 259         if (!self)
 260                 goto err_exit;
 261
 262         for (i = 0U, ring = self->ring[0];
 263                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 264                 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
 265                 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
 266         }
 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         int err;
 312
 313         if (!self)
 314                 return IRQ_NONE;
 315         err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
 316         if (err < 0)
 317                 return IRQ_NONE;
 318
 319         if (irq_mask) {
 320                 self->aq_hw_ops->hw_irq_disable(self->aq_hw,
 321                               1U << self->aq_ring_param.vec_idx);
 322                 napi_schedule(&self->napi);
 323         } else {
 324                 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
 325                 return IRQ_NONE;
 326         }
 327
 328         return IRQ_HANDLED;
 329 }
 330
 331 cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)
 332 {
 333         return &self->aq_ring_param.affinity_mask;
 334 }
 335
 336 void aq_vec_add_stats(struct aq_vec_s *self,
 337                       struct aq_ring_stats_rx_s *stats_rx,
 338                       struct aq_ring_stats_tx_s *stats_tx)
 339 {
 340         struct aq_ring_s *ring = NULL;
 341         unsigned int r = 0U;
 342
 343         for (r = 0U, ring = self->ring[0];
 344                 self->tx_rings > r; ++r, ring = self->ring[r]) {
 345                 struct aq_ring_stats_tx_s *tx = &ring[AQ_VEC_TX_ID].stats.tx;
 346                 struct aq_ring_stats_rx_s *rx = &ring[AQ_VEC_RX_ID].stats.rx;
 347
 348                 stats_rx->packets += rx->packets;
 349                 stats_rx->bytes += rx->bytes;
 350                 stats_rx->errors += rx->errors;
 351                 stats_rx->jumbo_packets += rx->jumbo_packets;
 352                 stats_rx->lro_packets += rx->lro_packets;
 353                 stats_rx->pg_losts += rx->pg_losts;
 354                 stats_rx->pg_flips += rx->pg_flips;
 355                 stats_rx->pg_reuses += rx->pg_reuses;
 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         struct aq_ring_stats_rx_s stats_rx;
 367         struct aq_ring_stats_tx_s stats_tx;
 368         unsigned int count = 0U;
 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 }