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_vec_s *self = NULL;
 107         struct aq_ring_s *ring = 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         return self;
 163 }
 164
 165 int aq_vec_init(struct aq_vec_s *self, const struct aq_hw_ops *aq_hw_ops,
 166                 struct aq_hw_s *aq_hw)
 167 {
 168         struct aq_ring_s *ring = NULL;
 169         unsigned int i = 0U;
 170         int err = 0;
 171
 172         self->aq_hw_ops = aq_hw_ops;
 173         self->aq_hw = aq_hw;
 174
 175         for (i = 0U, ring = self->ring[0];
 176                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 177                 err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
 178                 if (err < 0)
 179                         goto err_exit;
 180
 181                 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
 182                                                        &ring[AQ_VEC_TX_ID],
 183                                                        &self->aq_ring_param);
 184                 if (err < 0)
 185                         goto err_exit;
 186
 187                 err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
 188                 if (err < 0)
 189                         goto err_exit;
 190
 191                 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
 192                                                        &ring[AQ_VEC_RX_ID],
 193                                                        &self->aq_ring_param);
 194                 if (err < 0)
 195                         goto err_exit;
 196
 197                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
 198                 if (err < 0)
 199                         goto err_exit;
 200
 201                 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
 202                                                        &ring[AQ_VEC_RX_ID], 0U);
 203                 if (err < 0)
 204                         goto err_exit;
 205         }
 206
 207 err_exit:
 208         return err;
 209 }
 210
 211 int aq_vec_start(struct aq_vec_s *self)
 212 {
 213         struct aq_ring_s *ring = NULL;
 214         unsigned int i = 0U;
 215         int err = 0;
 216
 217         for (i = 0U, ring = self->ring[0];
 218                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 219                 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
 220                                                         &ring[AQ_VEC_TX_ID]);
 221                 if (err < 0)
 222                         goto err_exit;
 223
 224                 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
 225                                                         &ring[AQ_VEC_RX_ID]);
 226                 if (err < 0)
 227                         goto err_exit;
 228         }
 229
 230         napi_enable(&self->napi);
 231
 232 err_exit:
 233         return err;
 234 }
 235
 236 void aq_vec_stop(struct aq_vec_s *self)
 237 {
 238         struct aq_ring_s *ring = NULL;
 239         unsigned int i = 0U;
 240
 241         for (i = 0U, ring = self->ring[0];
 242                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 243                 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
 244                                                  &ring[AQ_VEC_TX_ID]);
 245
 246                 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
 247                                                  &ring[AQ_VEC_RX_ID]);
 248         }
 249
 250         napi_disable(&self->napi);
 251 }
 252
 253 void aq_vec_deinit(struct aq_vec_s *self)
 254 {
 255         struct aq_ring_s *ring = NULL;
 256         unsigned int i = 0U;
 257
 258         if (!self)
 259                 goto err_exit;
 260
 261         for (i = 0U, ring = self->ring[0];
 262                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 263                 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
 264                 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
 265         }
 266 err_exit:;
 267 }
 268
 269 void aq_vec_free(struct aq_vec_s *self)
 270 {
 271         struct aq_ring_s *ring = NULL;
 272         unsigned int i = 0U;
 273
 274         if (!self)
 275                 goto err_exit;
 276
 277         for (i = 0U, ring = self->ring[0];
 278                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 279                 aq_ring_free(&ring[AQ_VEC_TX_ID]);
 280                 aq_ring_free(&ring[AQ_VEC_RX_ID]);
 281         }
 282
 283         netif_napi_del(&self->napi);
 284
 285         kfree(self);
 286
 287 err_exit:;
 288 }
 289
 290 irqreturn_t aq_vec_isr(int irq, void *private)
 291 {
 292         struct aq_vec_s *self = private;
 293         int err = 0;
 294
 295         if (!self) {
 296                 err = -EINVAL;
 297                 goto err_exit;
 298         }
 299         napi_schedule(&self->napi);
 300
 301 err_exit:
 302         return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
 303 }
 304
 305 irqreturn_t aq_vec_isr_legacy(int irq, void *private)
 306 {
 307         struct aq_vec_s *self = private;
 308         u64 irq_mask = 0U;
 309         int err;
 310
 311         if (!self)
 312                 return IRQ_NONE;
 313         err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
 314         if (err < 0)
 315                 return IRQ_NONE;
 316
 317         if (irq_mask) {
 318                 self->aq_hw_ops->hw_irq_disable(self->aq_hw,
 319                               1U << self->aq_ring_param.vec_idx);
 320                 napi_schedule(&self->napi);
 321         } else {
 322                 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
 323                 return IRQ_NONE;
 324         }
 325
 326         return IRQ_HANDLED;
 327 }
 328
 329 cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)
 330 {
 331         return &self->aq_ring_param.affinity_mask;
 332 }
 333
 334 void aq_vec_add_stats(struct aq_vec_s *self,
 335                       struct aq_ring_stats_rx_s *stats_rx,
 336                       struct aq_ring_stats_tx_s *stats_tx)
 337 {
 338         struct aq_ring_s *ring = NULL;
 339         unsigned int r = 0U;
 340
 341         for (r = 0U, ring = self->ring[0];
 342                 self->tx_rings > r; ++r, ring = self->ring[r]) {
 343                 struct aq_ring_stats_tx_s *tx = &ring[AQ_VEC_TX_ID].stats.tx;
 344                 struct aq_ring_stats_rx_s *rx = &ring[AQ_VEC_RX_ID].stats.rx;
 345
 346                 stats_rx->packets += rx->packets;
 347                 stats_rx->bytes += rx->bytes;
 348                 stats_rx->errors += rx->errors;
 349                 stats_rx->jumbo_packets += rx->jumbo_packets;
 350                 stats_rx->lro_packets += rx->lro_packets;
 351                 stats_rx->pg_losts += rx->pg_losts;
 352                 stats_rx->pg_flips += rx->pg_flips;
 353                 stats_rx->pg_reuses += rx->pg_reuses;
 354
 355                 stats_tx->packets += tx->packets;
 356                 stats_tx->bytes += tx->bytes;
 357                 stats_tx->errors += tx->errors;
 358                 stats_tx->queue_restarts += tx->queue_restarts;
 359         }
 360 }
 361
 362 int aq_vec_get_sw_stats(struct aq_vec_s *self, u64 *data, unsigned int *p_count)
 363 {
 364         unsigned int count = 0U;
 365         struct aq_ring_stats_rx_s stats_rx;
 366         struct aq_ring_stats_tx_s stats_tx;
 367
 368         memset(&stats_rx, 0U, sizeof(struct aq_ring_stats_rx_s));
 369         memset(&stats_tx, 0U, sizeof(struct aq_ring_stats_tx_s));
 370         aq_vec_add_stats(self, &stats_rx, &stats_tx);
 371
 372         /* This data should mimic aq_ethtool_queue_stat_names structure
 373          */
 374         data[count] += stats_rx.packets;
 375         data[++count] += stats_tx.packets;
 376         data[++count] += stats_tx.queue_restarts;
 377         data[++count] += stats_rx.jumbo_packets;
 378         data[++count] += stats_rx.lro_packets;
 379         data[++count] += stats_rx.errors;
 380
 381         if (p_count)
 382                 *p_count = ++count;
 383
 384         return 0;
 385 }