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         const struct aq_hw_ops *aq_hw_ops;
  23         struct aq_hw_s *aq_hw;
  24         struct aq_nic_s *aq_nic;
  25         unsigned int tx_rings;
  26         unsigned int rx_rings;
  27         struct aq_ring_param_s aq_ring_param;
  28         struct napi_struct napi;
  29         struct aq_ring_s ring[AQ_CFG_TCS_MAX][2];
  30 };
  31
  32 #define AQ_VEC_TX_ID 0
  33 #define AQ_VEC_RX_ID 1
  34
  35 static int aq_vec_poll(struct napi_struct *napi, int budget)
  36 {
  37         struct aq_vec_s *self = container_of(napi, struct aq_vec_s, napi);
  38         unsigned int sw_tail_old = 0U;
  39         struct aq_ring_s *ring = NULL;
  40         bool was_tx_cleaned = true;
  41         unsigned int i = 0U;
  42         int work_done = 0;
  43         int err = 0;
  44
  45         if (!self) {
  46                 err = -EINVAL;
  47         } else {
  48                 for (i = 0U, ring = self->ring[0];
  49                         self->tx_rings > i; ++i, ring = self->ring[i]) {
  50                         if (self->aq_hw_ops->hw_ring_tx_head_update) {
  51                                 err = self->aq_hw_ops->hw_ring_tx_head_update(
  52                                                         self->aq_hw,
  53                                                         &ring[AQ_VEC_TX_ID]);
  54                                 if (err < 0)
  55                                         goto err_exit;
  56                         }
  57
  58                         if (ring[AQ_VEC_TX_ID].sw_head !=
  59                             ring[AQ_VEC_TX_ID].hw_head) {
  60                                 was_tx_cleaned = aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
  61                                 aq_ring_update_queue_state(&ring[AQ_VEC_TX_ID]);
  62                         }
  63
  64                         err = self->aq_hw_ops->hw_ring_rx_receive(self->aq_hw,
  65                                             &ring[AQ_VEC_RX_ID]);
  66                         if (err < 0)
  67                                 goto err_exit;
  68
  69                         if (ring[AQ_VEC_RX_ID].sw_head !=
  70                                 ring[AQ_VEC_RX_ID].hw_head) {
  71                                 err = aq_ring_rx_clean(&ring[AQ_VEC_RX_ID],
  72                                                        napi,
  73                                                        &work_done,
  74                                                        budget - work_done);
  75                                 if (err < 0)
  76                                         goto err_exit;
  77
  78                                 sw_tail_old = ring[AQ_VEC_RX_ID].sw_tail;
  79
  80                                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
  81                                 if (err < 0)
  82                                         goto err_exit;
  83
  84                                 err = self->aq_hw_ops->hw_ring_rx_fill(
  85                                         self->aq_hw,
  86                                         &ring[AQ_VEC_RX_ID], sw_tail_old);
  87                                 if (err < 0)
  88                                         goto err_exit;
  89                         }
  90                 }
  91
  92 err_exit:
  93                 if (!was_tx_cleaned)
  94                         work_done = budget;
  95
  96                 if (work_done < budget) {
  97                         napi_complete_done(napi, work_done);
  98                         self->aq_hw_ops->hw_irq_enable(self->aq_hw,
  99                                         1U << self->aq_ring_param.vec_idx);
 100                 }
 101         }
 102
 103         return work_done;
 104 }
 105
 106 struct aq_vec_s *aq_vec_alloc(struct aq_nic_s *aq_nic, unsigned int idx,
 107                               struct aq_nic_cfg_s *aq_nic_cfg)
 108 {
 109         struct aq_vec_s *self = NULL;
 110         struct aq_ring_s *ring = NULL;
 111         unsigned int i = 0U;
 112         int err = 0;
 113
 114         self = kzalloc(sizeof(*self), GFP_KERNEL);
 115         if (!self) {
 116                 err = -ENOMEM;
 117                 goto err_exit;
 118         }
 119
 120         self->aq_nic = aq_nic;
 121         self->aq_ring_param.vec_idx = idx;
 122         self->aq_ring_param.cpu =
 123                 idx + aq_nic_cfg->aq_rss.base_cpu_number;
 124
 125         cpumask_set_cpu(self->aq_ring_param.cpu,
 126                         &self->aq_ring_param.affinity_mask);
 127
 128         self->tx_rings = 0;
 129         self->rx_rings = 0;
 130
 131         netif_napi_add(aq_nic_get_ndev(aq_nic), &self->napi,
 132                        aq_vec_poll, AQ_CFG_NAPI_WEIGHT);
 133
 134         for (i = 0; i < aq_nic_cfg->tcs; ++i) {
 135                 unsigned int idx_ring = AQ_NIC_TCVEC2RING(self->nic,
 136                                                 self->tx_rings,
 137                                                 self->aq_ring_param.vec_idx);
 138
 139                 ring = aq_ring_tx_alloc(&self->ring[i][AQ_VEC_TX_ID], aq_nic,
 140                                         idx_ring, aq_nic_cfg);
 141                 if (!ring) {
 142                         err = -ENOMEM;
 143                         goto err_exit;
 144                 }
 145
 146                 ++self->tx_rings;
 147
 148                 aq_nic_set_tx_ring(aq_nic, idx_ring, ring);
 149
 150                 ring = aq_ring_rx_alloc(&self->ring[i][AQ_VEC_RX_ID], aq_nic,
 151                                         idx_ring, aq_nic_cfg);
 152                 if (!ring) {
 153                         err = -ENOMEM;
 154                         goto err_exit;
 155                 }
 156
 157                 ++self->rx_rings;
 158         }
 159
 160 err_exit:
 161         if (err < 0) {
 162                 aq_vec_free(self);
 163                 self = NULL;
 164         }
 165         return self;
 166 }
 167
 168 int aq_vec_init(struct aq_vec_s *self, const struct aq_hw_ops *aq_hw_ops,
 169                 struct aq_hw_s *aq_hw)
 170 {
 171         struct aq_ring_s *ring = NULL;
 172         unsigned int i = 0U;
 173         int err = 0;
 174
 175         self->aq_hw_ops = aq_hw_ops;
 176         self->aq_hw = aq_hw;
 177
 178         for (i = 0U, ring = self->ring[0];
 179                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 180                 err = aq_ring_init(&ring[AQ_VEC_TX_ID]);
 181                 if (err < 0)
 182                         goto err_exit;
 183
 184                 err = self->aq_hw_ops->hw_ring_tx_init(self->aq_hw,
 185                                                        &ring[AQ_VEC_TX_ID],
 186                                                        &self->aq_ring_param);
 187                 if (err < 0)
 188                         goto err_exit;
 189
 190                 err = aq_ring_init(&ring[AQ_VEC_RX_ID]);
 191                 if (err < 0)
 192                         goto err_exit;
 193
 194                 err = self->aq_hw_ops->hw_ring_rx_init(self->aq_hw,
 195                                                        &ring[AQ_VEC_RX_ID],
 196                                                        &self->aq_ring_param);
 197                 if (err < 0)
 198                         goto err_exit;
 199
 200                 err = aq_ring_rx_fill(&ring[AQ_VEC_RX_ID]);
 201                 if (err < 0)
 202                         goto err_exit;
 203
 204                 err = self->aq_hw_ops->hw_ring_rx_fill(self->aq_hw,
 205                                                        &ring[AQ_VEC_RX_ID], 0U);
 206                 if (err < 0)
 207                         goto err_exit;
 208         }
 209
 210 err_exit:
 211         return err;
 212 }
 213
 214 int aq_vec_start(struct aq_vec_s *self)
 215 {
 216         struct aq_ring_s *ring = NULL;
 217         unsigned int i = 0U;
 218         int err = 0;
 219
 220         for (i = 0U, ring = self->ring[0];
 221                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 222                 err = self->aq_hw_ops->hw_ring_tx_start(self->aq_hw,
 223                                                         &ring[AQ_VEC_TX_ID]);
 224                 if (err < 0)
 225                         goto err_exit;
 226
 227                 err = self->aq_hw_ops->hw_ring_rx_start(self->aq_hw,
 228                                                         &ring[AQ_VEC_RX_ID]);
 229                 if (err < 0)
 230                         goto err_exit;
 231         }
 232
 233         napi_enable(&self->napi);
 234
 235 err_exit:
 236         return err;
 237 }
 238
 239 void aq_vec_stop(struct aq_vec_s *self)
 240 {
 241         struct aq_ring_s *ring = NULL;
 242         unsigned int i = 0U;
 243
 244         for (i = 0U, ring = self->ring[0];
 245                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 246                 self->aq_hw_ops->hw_ring_tx_stop(self->aq_hw,
 247                                                  &ring[AQ_VEC_TX_ID]);
 248
 249                 self->aq_hw_ops->hw_ring_rx_stop(self->aq_hw,
 250                                                  &ring[AQ_VEC_RX_ID]);
 251         }
 252
 253         napi_disable(&self->napi);
 254 }
 255
 256 void aq_vec_deinit(struct aq_vec_s *self)
 257 {
 258         struct aq_ring_s *ring = NULL;
 259         unsigned int i = 0U;
 260
 261         if (!self)
 262                 goto err_exit;
 263
 264         for (i = 0U, ring = self->ring[0];
 265                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 266                 aq_ring_tx_clean(&ring[AQ_VEC_TX_ID]);
 267                 aq_ring_rx_deinit(&ring[AQ_VEC_RX_ID]);
 268         }
 269 err_exit:;
 270 }
 271
 272 void aq_vec_free(struct aq_vec_s *self)
 273 {
 274         struct aq_ring_s *ring = NULL;
 275         unsigned int i = 0U;
 276
 277         if (!self)
 278                 goto err_exit;
 279
 280         for (i = 0U, ring = self->ring[0];
 281                 self->tx_rings > i; ++i, ring = self->ring[i]) {
 282                 aq_ring_free(&ring[AQ_VEC_TX_ID]);
 283                 aq_ring_free(&ring[AQ_VEC_RX_ID]);
 284         }
 285
 286         netif_napi_del(&self->napi);
 287
 288         kfree(self);
 289
 290 err_exit:;
 291 }
 292
 293 irqreturn_t aq_vec_isr(int irq, void *private)
 294 {
 295         struct aq_vec_s *self = private;
 296         int err = 0;
 297
 298         if (!self) {
 299                 err = -EINVAL;
 300                 goto err_exit;
 301         }
 302         napi_schedule(&self->napi);
 303
 304 err_exit:
 305         return err >= 0 ? IRQ_HANDLED : IRQ_NONE;
 306 }
 307
 308 irqreturn_t aq_vec_isr_legacy(int irq, void *private)
 309 {
 310         struct aq_vec_s *self = private;
 311         u64 irq_mask = 0U;
 312         int err;
 313
 314         if (!self)
 315                 return IRQ_NONE;
 316         err = self->aq_hw_ops->hw_irq_read(self->aq_hw, &irq_mask);
 317         if (err < 0)
 318                 return IRQ_NONE;
 319
 320         if (irq_mask) {
 321                 self->aq_hw_ops->hw_irq_disable(self->aq_hw,
 322                               1U << self->aq_ring_param.vec_idx);
 323                 napi_schedule(&self->napi);
 324         } else {
 325                 self->aq_hw_ops->hw_irq_enable(self->aq_hw, 1U);
 326                 return IRQ_NONE;
 327         }
 328
 329         return IRQ_HANDLED;
 330 }
 331
 332 cpumask_t *aq_vec_get_affinity_mask(struct aq_vec_s *self)
 333 {
 334         return &self->aq_ring_param.affinity_mask;
 335 }
 336
 337 void aq_vec_add_stats(struct aq_vec_s *self,
 338                       struct aq_ring_stats_rx_s *stats_rx,
 339                       struct aq_ring_stats_tx_s *stats_tx)
 340 {
 341         struct aq_ring_s *ring = NULL;
 342         unsigned int r = 0U;
 343
 344         for (r = 0U, ring = self->ring[0];
 345                 self->tx_rings > r; ++r, ring = self->ring[r]) {
 346                 struct aq_ring_stats_tx_s *tx = &ring[AQ_VEC_TX_ID].stats.tx;
 347                 struct aq_ring_stats_rx_s *rx = &ring[AQ_VEC_RX_ID].stats.rx;
 348
 349                 stats_rx->packets += rx->packets;
 350                 stats_rx->bytes += rx->bytes;
 351                 stats_rx->errors += rx->errors;
 352                 stats_rx->jumbo_packets += rx->jumbo_packets;
 353                 stats_rx->lro_packets += rx->lro_packets;
 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 }