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                 if (!was_tx_cleaned)
  90                         work_done = budget;
  91
  92                 if (work_done < budget) {
  93                         napi_complete_done(napi, work_done);
  94                         self->aq_hw_ops->hw_irq_enable(self->aq_hw,
  95                                         1U << self->aq_ring_param.vec_idx);
  96                 }
  97         }
  98 err_exit:
  99         return work_done;
 100 }
 101
 102 struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
 103                               struct aq_nic_cfg_s *aq_nic_cfg)
 104 {
 105         struct aq_vec_s *self = NULL;
 106         struct aq_ring_s *ring = NULL;
 107         unsigned int i = 0U;
 108         int err = 0;
 109
 110         self = kzalloc(sizeof(*self), GFP_KERNEL);
 111         if (!self) {
 112                 err = -ENOMEM;
 113                 goto err_exit;
 114         }
 115
 116         self->aq_nic = aq_nic;
 117         self->aq_ring_param.vec_idx = idx;
 118         self->aq_ring_param.cpu =
 119                 idx + aq_nic_cfg->aq_rss.base_cpu_number;
 120
 121         cpumask_set_cpu(self->aq_ring_param.cpu,
 122                         &self->aq_ring_param.affinity_mask);
 123
 124         self->tx_rings = 0;
 125         self->rx_rings = 0;
 126
 127         netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi,
 128                        aq_vec_poll, AQ_CFG_NAPI_WEIGHT);
 129
 130         for (i = 0; i < aq_nic_cfg->tcs; ++i) {
 131                 unsigned int idx_ring = AQ_NIC_TCVEC2RING(self->nic,
 132                                                 self->tx_rings,
 133                                                 self->aq_ring_param.vec_idx);
 134
 135                 ring = aq_ring_tx_alloc(&self->ring[i][AQ_VEC_TX_ID], aq_nic,
 136                                         idx_ring, aq_nic_cfg);
 137                 if (!ring) {
 138                         err = -ENOMEM;
 139                         goto err_exit;
 140                 }
 141
 142                 ++self->tx_rings;
 143
 144                 aq_nic_set_tx_ring(aq_nic, idx_ring, ring);
 145
 146                 ring = aq_ring_rx_alloc(&self->ring[i][AQ_VEC_RX_ID], aq_nic,
 147                                         idx_ring, aq_nic_cfg);
 148                 if (!ring) {
 149                         err = -ENOMEM;
 150                         goto err_exit;
 151                 }
 152
 153                 ++self->rx_rings;
 154         }
 155
 156 err_exit:
 157         if (err < 0) {
 158                 aq_vec_free(self);
 159                 self = NULL;
 160         }
 161         return self;
 162 }
 163
 164 int aq_vec_init(struct aq_vec_s *self, const struct aq_hw_ops *aq_hw_ops,
 165                 struct aq_hw_s *aq_hw)
 166 {
 167         struct aq_ring_s *ring = NULL;
 168         unsigned int i = 0U;
 169         int err = 0;
 170
 171         self->aq_hw_ops = aq_hw_ops;
 172         self->aq_hw = aq_hw;
 173
 174         for (i = 0U, ring = self->ring[0];
 175                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 176                 err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
 177                 if (err < 0)
 178                         goto err_exit;
 179
 180                 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
 181                                                        &ring[AQ_VEC_TX_ID],
 182                                                        &self->aq_ring_param);
 183                 if (err < 0)
 184                         goto err_exit;
 185
 186                 err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
 187                 if (err < 0)
 188                         goto err_exit;
 189
 190                 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
 191                                                        &ring[AQ_VEC_RX_ID],
 192                                                        &self->aq_ring_param);
 193                 if (err < 0)
 194                         goto err_exit;
 195
 196                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
 197                 if (err < 0)
 198                         goto err_exit;
 199
 200                 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
 201                                                        &ring[AQ_VEC_RX_ID], 0U);
 202                 if (err < 0)
 203                         goto err_exit;
 204         }
 205
 206 err_exit:
 207         return err;
 208 }
 209
 210 int aq_vec_start(struct aq_vec_s *self)
 211 {
 212         struct aq_ring_s *ring = NULL;
 213         unsigned int i = 0U;
 214         int err = 0;
 215
 216         for (i = 0U, ring = self->ring[0];
 217                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 218                 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
 219                                                         &ring[AQ_VEC_TX_ID]);
 220                 if (err < 0)
 221                         goto err_exit;
 222
 223                 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
 224                                                         &ring[AQ_VEC_RX_ID]);
 225                 if (err < 0)
 226                         goto err_exit;
 227         }
 228
 229         napi_enable(&self->napi);
 230
 231 err_exit:
 232         return err;
 233 }
 234
 235 void aq_vec_stop(struct aq_vec_s *self)
 236 {
 237         struct aq_ring_s *ring = NULL;
 238         unsigned int i = 0U;
 239
 240         for (i = 0U, ring = self->ring[0];
 241                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 242                 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
 243                                                  &ring[AQ_VEC_TX_ID]);
 244
 245                 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
 246                                                  &ring[AQ_VEC_RX_ID]);
 247         }
 248
 249         napi_disable(&self->napi);
 250 }
 251
 252 void aq_vec_deinit(struct aq_vec_s *self)
 253 {
 254         struct aq_ring_s *ring = NULL;
 255         unsigned int i = 0U;
 256
 257         if (!self)
 258                 goto err_exit;
 259
 260         for (i = 0U, ring = self->ring[0];
 261                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 262                 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
 263                 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
 264         }
 265 err_exit:;
 266 }
 267
 268 void aq_vec_free(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_free(&ring[AQ_VEC_TX_ID]);
 279                 aq_ring_free(&ring[AQ_VEC_RX_ID]);
 280         }
 281
 282         netif_napi_del(&self->napi);
 283
 284         kfree(self);
 285
 286 err_exit:;
 287 }
 288
 289 irqreturn_t aq_vec_isr(int irq, void *private)
 290 {
 291         struct aq_vec_s *self = private;
 292         int err = 0;
 293
 294         if (!self) {
 295                 err = -EINVAL;
 296                 goto err_exit;
 297         }
 298         napi_schedule(&self->napi);
 299
 300 err_exit:
 301         return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
 302 }
 303
 304 irqreturn_t aq_vec_isr_legacy(int irq, void *private)
 305 {
 306         struct aq_vec_s *self = private;
 307         u64 irq_mask = 0U;
 308         irqreturn_t err = 0;
 309
 310         if (!self) {
 311                 err = -EINVAL;
 312                 goto err_exit;
 313         }
 314         err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
 315         if (err < 0)
 316                 goto err_exit;
 317
 318         if (irq_mask) {
 319                 self->aq_hw_ops->hw_irq_disable(self->aq_hw,
 320                               1U << self->aq_ring_param.vec_idx);
 321                 napi_schedule(&self->napi);
 322         } else {
 323                 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
 324                 err = IRQ_NONE;
 325         }
 326
 327 err_exit:
 328         return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
 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         unsigned int count = 0U;
 367         struct aq_ring_stats_rx_s stats_rx;
 368         struct aq_ring_stats_tx_s stats_tx;
 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 }