drivers/net/ethernet/amd/xgbe/xgbe-drv.c

   1 /*
   2  * AMD 10Gb Ethernet driver
   3  *
   4  * This file is available to you under your choice of the following two
   5  * licenses:
   6  *
   7  * License 1: GPLv2
   8  *
   9  * Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
  10  *
  11  * This file is free software; you may copy, redistribute and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation, either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  * This file is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  *
  24  * This file incorporates work covered by the following copyright and
  25  * permission notice:
  26  *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
  27  *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
  28  *     Inc. unless otherwise expressly agreed to in writing between Synopsys
  29  *     and you.
  30  *
  31  *     The Software IS NOT an item of Licensed Software or Licensed Product
  32  *     under any End User Software License Agreement or Agreement for Licensed
  33  *     Product with Synopsys or any supplement thereto.  Permission is hereby
  34  *     granted, free of charge, to any person obtaining a copy of this software
  35  *     annotated with this license and the Software, to deal in the Software
  36  *     without restriction, including without limitation the rights to use,
  37  *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  38  *     of the Software, and to permit persons to whom the Software is furnished
  39  *     to do so, subject to the following conditions:
  40  *
  41  *     The above copyright notice and this permission notice shall be included
  42  *     in all copies or substantial portions of the Software.
  43  *
  44  *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
  45  *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  46  *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  47  *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
  48  *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  49  *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  50  *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  51  *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  52  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  53  *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  54  *     THE POSSIBILITY OF SUCH DAMAGE.
  55  *
  56  *
  57  * License 2: Modified BSD
  58  *
  59  * Copyright (c) 2014-2016 Advanced Micro Devices, Inc.
  60  * All rights reserved.
  61  *
  62  * Redistribution and use in source and binary forms, with or without
  63  * modification, are permitted provided that the following conditions are met:
  64  *     * Redistributions of source code must retain the above copyright
  65  *       notice, this list of conditions and the following disclaimer.
  66  *     * Redistributions in binary form must reproduce the above copyright
  67  *       notice, this list of conditions and the following disclaimer in the
  68  *       documentation and/or other materials provided with the distribution.
  69  *     * Neither the name of Advanced Micro Devices, Inc. nor the
  70  *       names of its contributors may be used to endorse or promote products
  71  *       derived from this software without specific prior written permission.
  72  *
  73  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  74  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  75  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  76  * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
  77  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  78  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  79  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  80  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  81  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  82  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  83  *
  84  * This file incorporates work covered by the following copyright and
  85  * permission notice:
  86  *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
  87  *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
  88  *     Inc. unless otherwise expressly agreed to in writing between Synopsys
  89  *     and you.
  90  *
  91  *     The Software IS NOT an item of Licensed Software or Licensed Product
  92  *     under any End User Software License Agreement or Agreement for Licensed
  93  *     Product with Synopsys or any supplement thereto.  Permission is hereby
  94  *     granted, free of charge, to any person obtaining a copy of this software
  95  *     annotated with this license and the Software, to deal in the Software
  96  *     without restriction, including without limitation the rights to use,
  97  *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  98  *     of the Software, and to permit persons to whom the Software is furnished
  99  *     to do so, subject to the following conditions:
 100  *
 101  *     The above copyright notice and this permission notice shall be included
 102  *     in all copies or substantial portions of the Software.
 103  *
 104  *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 105  *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 106  *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 107  *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 108  *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 109  *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 110  *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 111  *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 112  *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 113  *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 114  *     THE POSSIBILITY OF SUCH DAMAGE.
 115  */
 116
 117 #include <linux/module.h>
 118 #include <linux/spinlock.h>
 119 #include <linux/tcp.h>
 120 #include <linux/if_vlan.h>
 121 #include <linux/interrupt.h>
 122 #include <linux/clk.h>
 123 #include <linux/if_ether.h>
 124 #include <linux/net_tstamp.h>
 125 #include <linux/phy.h>
 126 #include <net/vxlan.h>
 127
 128 #include "xgbe.h"
 129 #include "xgbe-common.h"
 130
 131 static unsigned int ecc_sec_info_threshold = 10;
 132 static unsigned int ecc_sec_warn_threshold = 10000;
 133 static unsigned int ecc_sec_period = 600;
 134 static unsigned int ecc_ded_threshold = 2;
 135 static unsigned int ecc_ded_period = 600;
 136
 137 #ifdef CONFIG_AMD_XGBE_HAVE_ECC
 138 /* Only expose the ECC parameters if supported */
 139 module_param(ecc_sec_info_threshold, uint, 0644);
 140 MODULE_PARM_DESC(ecc_sec_info_threshold,
 141                  " ECC corrected error informational threshold setting");
 142
 143 module_param(ecc_sec_warn_threshold, uint, 0644);
 144 MODULE_PARM_DESC(ecc_sec_warn_threshold,
 145                  " ECC corrected error warning threshold setting");
 146
 147 module_param(ecc_sec_period, uint, 0644);
 148 MODULE_PARM_DESC(ecc_sec_period, " ECC corrected error period (in seconds)");
 149
 150 module_param(ecc_ded_threshold, uint, 0644);
 151 MODULE_PARM_DESC(ecc_ded_threshold, " ECC detected error threshold setting");
 152
 153 module_param(ecc_ded_period, uint, 0644);
 154 MODULE_PARM_DESC(ecc_ded_period, " ECC detected error period (in seconds)");
 155 #endif
 156
 157 static int xgbe_one_poll(struct napi_struct *, int);
 158 static int xgbe_all_poll(struct napi_struct *, int);
 159 static void xgbe_stop(struct xgbe_prv_data *);
 160
 161 static void *xgbe_alloc_node(size_t size, int node)
 162 {
 163         void *mem;
 164
 165         mem = kzalloc_node(size, GFP_KERNEL, node);
 166         if (!mem)
 167                 mem = kzalloc(size, GFP_KERNEL);
 168
 169         return mem;
 170 }
 171
 172 static void xgbe_free_channels(struct xgbe_prv_data *pdata)
 173 {
 174         unsigned int i;
 175
 176         for (i = 0; i < ARRAY_SIZE(pdata->channel); i++) {
 177                 if (!pdata->channel[i])
 178                         continue;
 179
 180                 kfree(pdata->channel[i]->rx_ring);
 181                 kfree(pdata->channel[i]->tx_ring);
 182                 kfree(pdata->channel[i]);
 183
 184                 pdata->channel[i] = NULL;
 185         }
 186
 187         pdata->channel_count = 0;
 188 }
 189
 190 static int xgbe_alloc_channels(struct xgbe_prv_data *pdata)
 191 {
 192         struct xgbe_channel *channel;
 193         struct xgbe_ring *ring;
 194         unsigned int count, i;
 195         unsigned int cpu;
 196         int node;
 197
 198         count = max_t(unsigned int, pdata->tx_ring_count, pdata->rx_ring_count);
 199         for (i = 0; i < count; i++) {
 200                 /* Attempt to use a CPU on the node the device is on */
 201                 cpu = cpumask_local_spread(i, dev_to_node(pdata->dev));
 202
 203                 /* Set the allocation node based on the returned CPU */
 204                 node = cpu_to_node(cpu);
 205
 206                 channel = xgbe_alloc_node(sizeof(*channel), node);
 207                 if (!channel)
 208                         goto err_mem;
 209                 pdata->channel[i] = channel;
 210
 211                 snprintf(channel->name, sizeof(channel->name), "channel-%u", i);
 212                 channel->pdata = pdata;
 213                 channel->queue_index = i;
 214                 channel->dma_regs = pdata->xgmac_regs + DMA_CH_BASE +
 215                                     (DMA_CH_INC * i);
 216                 channel->node = node;
 217                 cpumask_set_cpu(cpu, &channel->affinity_mask);
 218
 219                 if (pdata->per_channel_irq)
 220                         channel->dma_irq = pdata->channel_irq[i];
 221
 222                 if (i < pdata->tx_ring_count) {
 223                         ring = xgbe_alloc_node(sizeof(*ring), node);
 224                         if (!ring)
 225                                 goto err_mem;
 226
 227                         spin_lock_init(&ring->lock);
 228                         ring->node = node;
 229
 230                         channel->tx_ring = ring;
 231                 }
 232
 233                 if (i < pdata->rx_ring_count) {
 234                         ring = xgbe_alloc_node(sizeof(*ring), node);
 235                         if (!ring)
 236                                 goto err_mem;
 237
 238                         spin_lock_init(&ring->lock);
 239                         ring->node = node;
 240
 241                         channel->rx_ring = ring;
 242                 }
 243
 244                 netif_dbg(pdata, drv, pdata->netdev,
 245                           "%s: cpu=%u, node=%d\n", channel->name, cpu, node);
 246
 247                 netif_dbg(pdata, drv, pdata->netdev,
 248                           "%s: dma_regs=%p, dma_irq=%d, tx=%p, rx=%p\n",
 249                           channel->name, channel->dma_regs, channel->dma_irq,
 250                           channel->tx_ring, channel->rx_ring);
 251         }
 252
 253         pdata->channel_count = count;
 254
 255         return 0;
 256
 257 err_mem:
 258         xgbe_free_channels(pdata);
 259
 260         return -ENOMEM;
 261 }
 262
 263 static inline unsigned int xgbe_tx_avail_desc(struct xgbe_ring *ring)
 264 {
 265         return (ring->rdesc_count - (ring->cur - ring->dirty));
 266 }
 267
 268 static inline unsigned int xgbe_rx_dirty_desc(struct xgbe_ring *ring)
 269 {
 270         return (ring->cur - ring->dirty);
 271 }
 272
 273 static int xgbe_maybe_stop_tx_queue(struct xgbe_channel *channel,
 274                                     struct xgbe_ring *ring, unsigned int count)
 275 {
 276         struct xgbe_prv_data *pdata = channel->pdata;
 277
 278         if (count > xgbe_tx_avail_desc(ring)) {
 279                 netif_info(pdata, drv, pdata->netdev,
 280                            "Tx queue stopped, not enough descriptors available\n");
 281                 netif_stop_subqueue(pdata->netdev, channel->queue_index);
 282                 ring->tx.queue_stopped = 1;
 283
 284                 /* If we haven't notified the hardware because of xmit_more
 285                  * support, tell it now
 286                  */
 287                 if (ring->tx.xmit_more)
 288                         pdata->hw_if.tx_start_xmit(channel, ring);
 289
 290                 return NETDEV_TX_BUSY;
 291         }
 292
 293         return 0;
 294 }
 295
 296 static int xgbe_calc_rx_buf_size(struct net_device *netdev, unsigned int mtu)
 297 {
 298         unsigned int rx_buf_size;
 299
 300         rx_buf_size = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 301         rx_buf_size = clamp_val(rx_buf_size, XGBE_RX_MIN_BUF_SIZE, PAGE_SIZE);
 302
 303         rx_buf_size = (rx_buf_size + XGBE_RX_BUF_ALIGN - 1) &
 304                       ~(XGBE_RX_BUF_ALIGN - 1);
 305
 306         return rx_buf_size;
 307 }
 308
 309 static void xgbe_enable_rx_tx_int(struct xgbe_prv_data *pdata,
 310                                   struct xgbe_channel *channel)
 311 {
 312         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 313         enum xgbe_int int_id;
 314
 315         if (channel->tx_ring && channel->rx_ring)
 316                 int_id = XGMAC_INT_DMA_CH_SR_TI_RI;
 317         else if (channel->tx_ring)
 318                 int_id = XGMAC_INT_DMA_CH_SR_TI;
 319         else if (channel->rx_ring)
 320                 int_id = XGMAC_INT_DMA_CH_SR_RI;
 321         else
 322                 return;
 323
 324         hw_if->enable_int(channel, int_id);
 325 }
 326
 327 static void xgbe_enable_rx_tx_ints(struct xgbe_prv_data *pdata)
 328 {
 329         unsigned int i;
 330
 331         for (i = 0; i < pdata->channel_count; i++)
 332                 xgbe_enable_rx_tx_int(pdata, pdata->channel[i]);
 333 }
 334
 335 static void xgbe_disable_rx_tx_int(struct xgbe_prv_data *pdata,
 336                                    struct xgbe_channel *channel)
 337 {
 338         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 339         enum xgbe_int int_id;
 340
 341         if (channel->tx_ring && channel->rx_ring)
 342                 int_id = XGMAC_INT_DMA_CH_SR_TI_RI;
 343         else if (channel->tx_ring)
 344                 int_id = XGMAC_INT_DMA_CH_SR_TI;
 345         else if (channel->rx_ring)
 346                 int_id = XGMAC_INT_DMA_CH_SR_RI;
 347         else
 348                 return;
 349
 350         hw_if->disable_int(channel, int_id);
 351 }
 352
 353 static void xgbe_disable_rx_tx_ints(struct xgbe_prv_data *pdata)
 354 {
 355         unsigned int i;
 356
 357         for (i = 0; i < pdata->channel_count; i++)
 358                 xgbe_disable_rx_tx_int(pdata, pdata->channel[i]);
 359 }
 360
 361 static bool xgbe_ecc_sec(struct xgbe_prv_data *pdata, unsigned long *period,
 362                          unsigned int *count, const char *area)
 363 {
 364         if (time_before(jiffies, *period)) {
 365                 (*count)++;
 366         } else {
 367                 *period = jiffies + (ecc_sec_period * HZ);
 368                 *count = 1;
 369         }
 370
 371         if (*count > ecc_sec_info_threshold)
 372                 dev_warn_once(pdata->dev,
 373                               "%s ECC corrected errors exceed informational threshold\n",
 374                               area);
 375
 376         if (*count > ecc_sec_warn_threshold) {
 377                 dev_warn_once(pdata->dev,
 378                               "%s ECC corrected errors exceed warning threshold\n",
 379                               area);
 380                 return true;
 381         }
 382
 383         return false;
 384 }
 385
 386 static bool xgbe_ecc_ded(struct xgbe_prv_data *pdata, unsigned long *period,
 387                          unsigned int *count, const char *area)
 388 {
 389         if (time_before(jiffies, *period)) {
 390                 (*count)++;
 391         } else {
 392                 *period = jiffies + (ecc_ded_period * HZ);
 393                 *count = 1;
 394         }
 395
 396         if (*count > ecc_ded_threshold) {
 397                 netdev_alert(pdata->netdev,
 398                              "%s ECC detected errors exceed threshold\n",
 399                              area);
 400                 return true;
 401         }
 402
 403         return false;
 404 }
 405
 406 static void xgbe_ecc_isr_task(struct tasklet_struct *t)
 407 {
 408         struct xgbe_prv_data *pdata = from_tasklet(pdata, t, tasklet_ecc);
 409         unsigned int ecc_isr;
 410         bool stop = false;
 411
 412         /* Mask status with only the interrupts we care about */
 413         ecc_isr = XP_IOREAD(pdata, XP_ECC_ISR);
 414         ecc_isr &= XP_IOREAD(pdata, XP_ECC_IER);
 415         netif_dbg(pdata, intr, pdata->netdev, "ECC_ISR=%#010x\n", ecc_isr);
 416
 417         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, TX_DED)) {
 418                 stop |= xgbe_ecc_ded(pdata, &pdata->tx_ded_period,
 419                                      &pdata->tx_ded_count, "TX fifo");
 420         }
 421
 422         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, RX_DED)) {
 423                 stop |= xgbe_ecc_ded(pdata, &pdata->rx_ded_period,
 424                                      &pdata->rx_ded_count, "RX fifo");
 425         }
 426
 427         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, DESC_DED)) {
 428                 stop |= xgbe_ecc_ded(pdata, &pdata->desc_ded_period,
 429                                      &pdata->desc_ded_count,
 430                                      "descriptor cache");
 431         }
 432
 433         if (stop) {
 434                 pdata->hw_if.disable_ecc_ded(pdata);
 435                 schedule_work(&pdata->stopdev_work);
 436                 goto out;
 437         }
 438
 439         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, TX_SEC)) {
 440                 if (xgbe_ecc_sec(pdata, &pdata->tx_sec_period,
 441                                  &pdata->tx_sec_count, "TX fifo"))
 442                         pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_TX);
 443         }
 444
 445         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, RX_SEC))
 446                 if (xgbe_ecc_sec(pdata, &pdata->rx_sec_period,
 447                                  &pdata->rx_sec_count, "RX fifo"))
 448                         pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_RX);
 449
 450         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, DESC_SEC))
 451                 if (xgbe_ecc_sec(pdata, &pdata->desc_sec_period,
 452                                  &pdata->desc_sec_count, "descriptor cache"))
 453                         pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_DESC);
 454
 455 out:
 456         /* Clear all ECC interrupts */
 457         XP_IOWRITE(pdata, XP_ECC_ISR, ecc_isr);
 458
 459         /* Reissue interrupt if status is not clear */
 460         if (pdata->vdata->irq_reissue_support)
 461                 XP_IOWRITE(pdata, XP_INT_REISSUE_EN, 1 << 1);
 462 }
 463
 464 static irqreturn_t xgbe_ecc_isr(int irq, void *data)
 465 {
 466         struct xgbe_prv_data *pdata = data;
 467
 468         if (pdata->isr_as_tasklet)
 469                 tasklet_schedule(&pdata->tasklet_ecc);
 470         else
 471                 xgbe_ecc_isr_task(&pdata->tasklet_ecc);
 472
 473         return IRQ_HANDLED;
 474 }
 475
 476 static void xgbe_isr_task(struct tasklet_struct *t)
 477 {
 478         struct xgbe_prv_data *pdata = from_tasklet(pdata, t, tasklet_dev);
 479         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 480         struct xgbe_channel *channel;
 481         unsigned int dma_isr, dma_ch_isr;
 482         unsigned int mac_isr, mac_tssr, mac_mdioisr;
 483         unsigned int i;
 484
 485         /* The DMA interrupt status register also reports MAC and MTL
 486          * interrupts. So for polling mode, we just need to check for
 487          * this register to be non-zero
 488          */
 489         dma_isr = XGMAC_IOREAD(pdata, DMA_ISR);
 490         if (!dma_isr)
 491                 goto isr_done;
 492
 493         netif_dbg(pdata, intr, pdata->netdev, "DMA_ISR=%#010x\n", dma_isr);
 494
 495         for (i = 0; i < pdata->channel_count; i++) {
 496                 if (!(dma_isr & (1 << i)))
 497                         continue;
 498
 499                 channel = pdata->channel[i];
 500
 501                 dma_ch_isr = XGMAC_DMA_IOREAD(channel, DMA_CH_SR);
 502                 netif_dbg(pdata, intr, pdata->netdev, "DMA_CH%u_ISR=%#010x\n",
 503                           i, dma_ch_isr);
 504
 505                 /* The TI or RI interrupt bits may still be set even if using
 506                  * per channel DMA interrupts. Check to be sure those are not
 507                  * enabled before using the private data napi structure.
 508                  */
 509                 if (!pdata->per_channel_irq &&
 510                     (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, TI) ||
 511                      XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RI))) {
 512                         if (napi_schedule_prep(&pdata->napi)) {
 513                                 /* Disable Tx and Rx interrupts */
 514                                 xgbe_disable_rx_tx_ints(pdata);
 515
 516                                 /* Turn on polling */
 517                                 __napi_schedule(&pdata->napi);
 518                         }
 519                 } else {
 520                         /* Don't clear Rx/Tx status if doing per channel DMA
 521                          * interrupts, these will be cleared by the ISR for
 522                          * per channel DMA interrupts.
 523                          */
 524                         XGMAC_SET_BITS(dma_ch_isr, DMA_CH_SR, TI, 0);
 525                         XGMAC_SET_BITS(dma_ch_isr, DMA_CH_SR, RI, 0);
 526                 }
 527
 528                 if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RBU))
 529                         pdata->ext_stats.rx_buffer_unavailable++;
 530
 531                 /* Restart the device on a Fatal Bus Error */
 532                 if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, FBE))
 533                         schedule_work(&pdata->restart_work);
 534
 535                 /* Clear interrupt signals */
 536                 XGMAC_DMA_IOWRITE(channel, DMA_CH_SR, dma_ch_isr);
 537         }
 538
 539         if (XGMAC_GET_BITS(dma_isr, DMA_ISR, MACIS)) {
 540                 mac_isr = XGMAC_IOREAD(pdata, MAC_ISR);
 541
 542                 netif_dbg(pdata, intr, pdata->netdev, "MAC_ISR=%#010x\n",
 543                           mac_isr);
 544
 545                 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCTXIS))
 546                         hw_if->tx_mmc_int(pdata);
 547
 548                 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCRXIS))
 549                         hw_if->rx_mmc_int(pdata);
 550
 551                 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, TSIS)) {
 552                         mac_tssr = XGMAC_IOREAD(pdata, MAC_TSSR);
 553
 554                         netif_dbg(pdata, intr, pdata->netdev,
 555                                   "MAC_TSSR=%#010x\n", mac_tssr);
 556
 557                         if (XGMAC_GET_BITS(mac_tssr, MAC_TSSR, TXTSC)) {
 558                                 /* Read Tx Timestamp to clear interrupt */
 559                                 pdata->tx_tstamp =
 560                                         hw_if->get_tx_tstamp(pdata);
 561                                 queue_work(pdata->dev_workqueue,
 562                                            &pdata->tx_tstamp_work);
 563                         }
 564                 }
 565
 566                 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, SMI)) {
 567                         mac_mdioisr = XGMAC_IOREAD(pdata, MAC_MDIOISR);
 568
 569                         netif_dbg(pdata, intr, pdata->netdev,
 570                                   "MAC_MDIOISR=%#010x\n", mac_mdioisr);
 571
 572                         if (XGMAC_GET_BITS(mac_mdioisr, MAC_MDIOISR,
 573                                            SNGLCOMPINT))
 574                                 complete(&pdata->mdio_complete);
 575                 }
 576         }
 577
 578 isr_done:
 579         /* If there is not a separate AN irq, handle it here */
 580         if (pdata->dev_irq == pdata->an_irq)
 581                 pdata->phy_if.an_isr(pdata);
 582
 583         /* If there is not a separate ECC irq, handle it here */
 584         if (pdata->vdata->ecc_support && (pdata->dev_irq == pdata->ecc_irq))
 585                 xgbe_ecc_isr_task(&pdata->tasklet_ecc);
 586
 587         /* If there is not a separate I2C irq, handle it here */
 588         if (pdata->vdata->i2c_support && (pdata->dev_irq == pdata->i2c_irq))
 589                 pdata->i2c_if.i2c_isr(pdata);
 590
 591         /* Reissue interrupt if status is not clear */
 592         if (pdata->vdata->irq_reissue_support) {
 593                 unsigned int reissue_mask;
 594
 595                 reissue_mask = 1 << 0;
 596                 if (!pdata->per_channel_irq)
 597                         reissue_mask |= 0xffff << 4;
 598
 599                 XP_IOWRITE(pdata, XP_INT_REISSUE_EN, reissue_mask);
 600         }
 601 }
 602
 603 static irqreturn_t xgbe_isr(int irq, void *data)
 604 {
 605         struct xgbe_prv_data *pdata = data;
 606
 607         if (pdata->isr_as_tasklet)
 608                 tasklet_schedule(&pdata->tasklet_dev);
 609         else
 610                 xgbe_isr_task(&pdata->tasklet_dev);
 611
 612         return IRQ_HANDLED;
 613 }
 614
 615 static irqreturn_t xgbe_dma_isr(int irq, void *data)
 616 {
 617         struct xgbe_channel *channel = data;
 618         struct xgbe_prv_data *pdata = channel->pdata;
 619         unsigned int dma_status;
 620
 621         /* Per channel DMA interrupts are enabled, so we use the per
 622          * channel napi structure and not the private data napi structure
 623          */
 624         if (napi_schedule_prep(&channel->napi)) {
 625                 /* Disable Tx and Rx interrupts */
 626                 if (pdata->channel_irq_mode)
 627                         xgbe_disable_rx_tx_int(pdata, channel);
 628                 else
 629                         disable_irq_nosync(channel->dma_irq);
 630
 631                 /* Turn on polling */
 632                 __napi_schedule_irqoff(&channel->napi);
 633         }
 634
 635         /* Clear Tx/Rx signals */
 636         dma_status = 0;
 637         XGMAC_SET_BITS(dma_status, DMA_CH_SR, TI, 1);
 638         XGMAC_SET_BITS(dma_status, DMA_CH_SR, RI, 1);
 639         XGMAC_DMA_IOWRITE(channel, DMA_CH_SR, dma_status);
 640
 641         return IRQ_HANDLED;
 642 }
 643
 644 static void xgbe_tx_timer(struct timer_list *t)
 645 {
 646         struct xgbe_channel *channel = from_timer(channel, t, tx_timer);
 647         struct xgbe_prv_data *pdata = channel->pdata;
 648         struct napi_struct *napi;
 649
 650         DBGPR("-->xgbe_tx_timer\n");
 651
 652         napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
 653
 654         if (napi_schedule_prep(napi)) {
 655                 /* Disable Tx and Rx interrupts */
 656                 if (pdata->per_channel_irq)
 657                         if (pdata->channel_irq_mode)
 658                                 xgbe_disable_rx_tx_int(pdata, channel);
 659                         else
 660                                 disable_irq_nosync(channel->dma_irq);
 661                 else
 662                         xgbe_disable_rx_tx_ints(pdata);
 663
 664                 /* Turn on polling */
 665                 __napi_schedule(napi);
 666         }
 667
 668         channel->tx_timer_active = 0;
 669
 670         DBGPR("<--xgbe_tx_timer\n");
 671 }
 672
 673 static void xgbe_service(struct work_struct *work)
 674 {
 675         struct xgbe_prv_data *pdata = container_of(work,
 676                                                    struct xgbe_prv_data,
 677                                                    service_work);
 678
 679         pdata->phy_if.phy_status(pdata);
 680 }
 681
 682 static void xgbe_service_timer(struct timer_list *t)
 683 {
 684         struct xgbe_prv_data *pdata = from_timer(pdata, t, service_timer);
 685
 686         queue_work(pdata->dev_workqueue, &pdata->service_work);
 687
 688         mod_timer(&pdata->service_timer, jiffies + HZ);
 689 }
 690
 691 static void xgbe_init_timers(struct xgbe_prv_data *pdata)
 692 {
 693         struct xgbe_channel *channel;
 694         unsigned int i;
 695
 696         timer_setup(&pdata->service_timer, xgbe_service_timer, 0);
 697
 698         for (i = 0; i < pdata->channel_count; i++) {
 699                 channel = pdata->channel[i];
 700                 if (!channel->tx_ring)
 701                         break;
 702
 703                 timer_setup(&channel->tx_timer, xgbe_tx_timer, 0);
 704         }
 705 }
 706
 707 static void xgbe_start_timers(struct xgbe_prv_data *pdata)
 708 {
 709         mod_timer(&pdata->service_timer, jiffies + HZ);
 710 }
 711
 712 static void xgbe_stop_timers(struct xgbe_prv_data *pdata)
 713 {
 714         struct xgbe_channel *channel;
 715         unsigned int i;
 716
 717         del_timer_sync(&pdata->service_timer);
 718
 719         for (i = 0; i < pdata->channel_count; i++) {
 720                 channel = pdata->channel[i];
 721                 if (!channel->tx_ring)
 722                         break;
 723
 724                 /* Deactivate the Tx timer */
 725                 del_timer_sync(&channel->tx_timer);
 726                 channel->tx_timer_active = 0;
 727         }
 728 }
 729
 730 void xgbe_get_all_hw_features(struct xgbe_prv_data *pdata)
 731 {
 732         unsigned int mac_hfr0, mac_hfr1, mac_hfr2;
 733         struct xgbe_hw_features *hw_feat = &pdata->hw_feat;
 734
 735         mac_hfr0 = XGMAC_IOREAD(pdata, MAC_HWF0R);
 736         mac_hfr1 = XGMAC_IOREAD(pdata, MAC_HWF1R);
 737         mac_hfr2 = XGMAC_IOREAD(pdata, MAC_HWF2R);
 738
 739         memset(hw_feat, 0, sizeof(*hw_feat));
 740
 741         hw_feat->version = XGMAC_IOREAD(pdata, MAC_VR);
 742
 743         /* Hardware feature register 0 */
 744         hw_feat->gmii        = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, GMIISEL);
 745         hw_feat->vlhash      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, VLHASH);
 746         hw_feat->sma         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, SMASEL);
 747         hw_feat->rwk         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, RWKSEL);
 748         hw_feat->mgk         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, MGKSEL);
 749         hw_feat->mmc         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, MMCSEL);
 750         hw_feat->aoe         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, ARPOFFSEL);
 751         hw_feat->ts          = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TSSEL);
 752         hw_feat->eee         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, EEESEL);
 753         hw_feat->tx_coe      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TXCOESEL);
 754         hw_feat->rx_coe      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, RXCOESEL);
 755         hw_feat->addn_mac    = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R,
 756                                               ADDMACADRSEL);
 757         hw_feat->ts_src      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TSSTSSEL);
 758         hw_feat->sa_vlan_ins = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, SAVLANINS);
 759         hw_feat->vxn         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, VXN);
 760
 761         /* Hardware feature register 1 */
 762         hw_feat->rx_fifo_size  = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
 763                                                 RXFIFOSIZE);
 764         hw_feat->tx_fifo_size  = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
 765                                                 TXFIFOSIZE);
 766         hw_feat->adv_ts_hi     = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, ADVTHWORD);
 767         hw_feat->dma_width     = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, ADDR64);
 768         hw_feat->dcb           = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DCBEN);
 769         hw_feat->sph           = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, SPHEN);
 770         hw_feat->tso           = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, TSOEN);
 771         hw_feat->dma_debug     = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DBGMEMA);
 772         hw_feat->rss           = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, RSSEN);
 773         hw_feat->tc_cnt        = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, NUMTC);
 774         hw_feat->hash_table_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
 775                                                   HASHTBLSZ);
 776         hw_feat->l3l4_filter_num = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
 777                                                   L3L4FNUM);
 778
 779         /* Hardware feature register 2 */
 780         hw_feat->rx_q_cnt     = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, RXQCNT);
 781         hw_feat->tx_q_cnt     = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, TXQCNT);
 782         hw_feat->rx_ch_cnt    = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, RXCHCNT);
 783         hw_feat->tx_ch_cnt    = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, TXCHCNT);
 784         hw_feat->pps_out_num  = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, PPSOUTNUM);
 785         hw_feat->aux_snap_num = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, AUXSNAPNUM);
 786
 787         /* Translate the Hash Table size into actual number */
 788         switch (hw_feat->hash_table_size) {
 789         case 0:
 790                 break;
 791         case 1:
 792                 hw_feat->hash_table_size = 64;
 793                 break;
 794         case 2:
 795                 hw_feat->hash_table_size = 128;
 796                 break;
 797         case 3:
 798                 hw_feat->hash_table_size = 256;
 799                 break;
 800         }
 801
 802         /* Translate the address width setting into actual number */
 803         switch (hw_feat->dma_width) {
 804         case 0:
 805                 hw_feat->dma_width = 32;
 806                 break;
 807         case 1:
 808                 hw_feat->dma_width = 40;
 809                 break;
 810         case 2:
 811                 hw_feat->dma_width = 48;
 812                 break;
 813         default:
 814                 hw_feat->dma_width = 32;
 815         }
 816
 817         /* The Queue, Channel and TC counts are zero based so increment them
 818          * to get the actual number
 819          */
 820         hw_feat->rx_q_cnt++;
 821         hw_feat->tx_q_cnt++;
 822         hw_feat->rx_ch_cnt++;
 823         hw_feat->tx_ch_cnt++;
 824         hw_feat->tc_cnt++;
 825
 826         /* Translate the fifo sizes into actual numbers */
 827         hw_feat->rx_fifo_size = 1 << (hw_feat->rx_fifo_size + 7);
 828         hw_feat->tx_fifo_size = 1 << (hw_feat->tx_fifo_size + 7);
 829
 830         if (netif_msg_probe(pdata)) {
 831                 dev_dbg(pdata->dev, "Hardware features:\n");
 832
 833                 /* Hardware feature register 0 */
 834                 dev_dbg(pdata->dev, "  1GbE support              : %s\n",
 835                         hw_feat->gmii ? "yes" : "no");
 836                 dev_dbg(pdata->dev, "  VLAN hash filter          : %s\n",
 837                         hw_feat->vlhash ? "yes" : "no");
 838                 dev_dbg(pdata->dev, "  MDIO interface            : %s\n",
 839                         hw_feat->sma ? "yes" : "no");
 840                 dev_dbg(pdata->dev, "  Wake-up packet support    : %s\n",
 841                         hw_feat->rwk ? "yes" : "no");
 842                 dev_dbg(pdata->dev, "  Magic packet support      : %s\n",
 843                         hw_feat->mgk ? "yes" : "no");
 844                 dev_dbg(pdata->dev, "  Management counters       : %s\n",
 845                         hw_feat->mmc ? "yes" : "no");
 846                 dev_dbg(pdata->dev, "  ARP offload               : %s\n",
 847                         hw_feat->aoe ? "yes" : "no");
 848                 dev_dbg(pdata->dev, "  IEEE 1588-2008 Timestamp  : %s\n",
 849                         hw_feat->ts ? "yes" : "no");
 850                 dev_dbg(pdata->dev, "  Energy Efficient Ethernet : %s\n",
 851                         hw_feat->eee ? "yes" : "no");
 852                 dev_dbg(pdata->dev, "  TX checksum offload       : %s\n",
 853                         hw_feat->tx_coe ? "yes" : "no");
 854                 dev_dbg(pdata->dev, "  RX checksum offload       : %s\n",
 855                         hw_feat->rx_coe ? "yes" : "no");
 856                 dev_dbg(pdata->dev, "  Additional MAC addresses  : %u\n",
 857                         hw_feat->addn_mac);
 858                 dev_dbg(pdata->dev, "  Timestamp source          : %s\n",
 859                         (hw_feat->ts_src == 1) ? "internal" :
 860                         (hw_feat->ts_src == 2) ? "external" :
 861                         (hw_feat->ts_src == 3) ? "internal/external" : "n/a");
 862                 dev_dbg(pdata->dev, "  SA/VLAN insertion         : %s\n",
 863                         hw_feat->sa_vlan_ins ? "yes" : "no");
 864                 dev_dbg(pdata->dev, "  VXLAN/NVGRE support       : %s\n",
 865                         hw_feat->vxn ? "yes" : "no");
 866
 867                 /* Hardware feature register 1 */
 868                 dev_dbg(pdata->dev, "  RX fifo size              : %u\n",
 869                         hw_feat->rx_fifo_size);
 870                 dev_dbg(pdata->dev, "  TX fifo size              : %u\n",
 871                         hw_feat->tx_fifo_size);
 872                 dev_dbg(pdata->dev, "  IEEE 1588 high word       : %s\n",
 873                         hw_feat->adv_ts_hi ? "yes" : "no");
 874                 dev_dbg(pdata->dev, "  DMA width                 : %u\n",
 875                         hw_feat->dma_width);
 876                 dev_dbg(pdata->dev, "  Data Center Bridging      : %s\n",
 877                         hw_feat->dcb ? "yes" : "no");
 878                 dev_dbg(pdata->dev, "  Split header              : %s\n",
 879                         hw_feat->sph ? "yes" : "no");
 880                 dev_dbg(pdata->dev, "  TCP Segmentation Offload  : %s\n",
 881                         hw_feat->tso ? "yes" : "no");
 882                 dev_dbg(pdata->dev, "  Debug memory interface    : %s\n",
 883                         hw_feat->dma_debug ? "yes" : "no");
 884                 dev_dbg(pdata->dev, "  Receive Side Scaling      : %s\n",
 885                         hw_feat->rss ? "yes" : "no");
 886                 dev_dbg(pdata->dev, "  Traffic Class count       : %u\n",
 887                         hw_feat->tc_cnt);
 888                 dev_dbg(pdata->dev, "  Hash table size           : %u\n",
 889                         hw_feat->hash_table_size);
 890                 dev_dbg(pdata->dev, "  L3/L4 Filters             : %u\n",
 891                         hw_feat->l3l4_filter_num);
 892
 893                 /* Hardware feature register 2 */
 894                 dev_dbg(pdata->dev, "  RX queue count            : %u\n",
 895                         hw_feat->rx_q_cnt);
 896                 dev_dbg(pdata->dev, "  TX queue count            : %u\n",
 897                         hw_feat->tx_q_cnt);
 898                 dev_dbg(pdata->dev, "  RX DMA channel count      : %u\n",
 899                         hw_feat->rx_ch_cnt);
 900                 dev_dbg(pdata->dev, "  TX DMA channel count      : %u\n",
 901                         hw_feat->rx_ch_cnt);
 902                 dev_dbg(pdata->dev, "  PPS outputs               : %u\n",
 903                         hw_feat->pps_out_num);
 904                 dev_dbg(pdata->dev, "  Auxiliary snapshot inputs : %u\n",
 905                         hw_feat->aux_snap_num);
 906         }
 907 }
 908
 909 static int xgbe_vxlan_set_port(struct net_device *netdev, unsigned int table,
 910                                unsigned int entry, struct udp_tunnel_info *ti)
 911 {
 912         struct xgbe_prv_data *pdata = netdev_priv(netdev);
 913
 914         pdata->vxlan_port = be16_to_cpu(ti->port);
 915         pdata->hw_if.enable_vxlan(pdata);
 916
 917         return 0;
 918 }
 919
 920 static int xgbe_vxlan_unset_port(struct net_device *netdev, unsigned int table,
 921                                  unsigned int entry, struct udp_tunnel_info *ti)
 922 {
 923         struct xgbe_prv_data *pdata = netdev_priv(netdev);
 924
 925         pdata->hw_if.disable_vxlan(pdata);
 926         pdata->vxlan_port = 0;
 927
 928         return 0;
 929 }
 930
 931 static const struct udp_tunnel_nic_info xgbe_udp_tunnels = {
 932         .set_port       = xgbe_vxlan_set_port,
 933         .unset_port     = xgbe_vxlan_unset_port,
 934         .flags          = UDP_TUNNEL_NIC_INFO_OPEN_ONLY,
 935         .tables         = {
 936                 { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, },
 937         },
 938 };
 939
 940 const struct udp_tunnel_nic_info *xgbe_get_udp_tunnel_info(void)
 941 {
 942         return &xgbe_udp_tunnels;
 943 }
 944
 945 static void xgbe_napi_enable(struct xgbe_prv_data *pdata, unsigned int add)
 946 {
 947         struct xgbe_channel *channel;
 948         unsigned int i;
 949
 950         if (pdata->per_channel_irq) {
 951                 for (i = 0; i < pdata->channel_count; i++) {
 952                         channel = pdata->channel[i];
 953                         if (add)
 954                                 netif_napi_add(pdata->netdev, &channel->napi,
 955                                                xgbe_one_poll, NAPI_POLL_WEIGHT);
 956
 957                         napi_enable(&channel->napi);
 958                 }
 959         } else {
 960                 if (add)
 961                         netif_napi_add(pdata->netdev, &pdata->napi,
 962                                        xgbe_all_poll, NAPI_POLL_WEIGHT);
 963
 964                 napi_enable(&pdata->napi);
 965         }
 966 }
 967
 968 static void xgbe_napi_disable(struct xgbe_prv_data *pdata, unsigned int del)
 969 {
 970         struct xgbe_channel *channel;
 971         unsigned int i;
 972
 973         if (pdata->per_channel_irq) {
 974                 for (i = 0; i < pdata->channel_count; i++) {
 975                         channel = pdata->channel[i];
 976                         napi_disable(&channel->napi);
 977
 978                         if (del)
 979                                 netif_napi_del(&channel->napi);
 980                 }
 981         } else {
 982                 napi_disable(&pdata->napi);
 983
 984                 if (del)
 985                         netif_napi_del(&pdata->napi);
 986         }
 987 }
 988
 989 static int xgbe_request_irqs(struct xgbe_prv_data *pdata)
 990 {
 991         struct xgbe_channel *channel;
 992         struct net_device *netdev = pdata->netdev;
 993         unsigned int i;
 994         int ret;
 995
 996         tasklet_setup(&pdata->tasklet_dev, xgbe_isr_task);
 997         tasklet_setup(&pdata->tasklet_ecc, xgbe_ecc_isr_task);
 998
 999         ret = devm_request_irq(pdata->dev, pdata->dev_irq, xgbe_isr, 0,
1000                                netdev_name(netdev), pdata);
1001         if (ret) {
1002                 netdev_alert(netdev, "error requesting irq %d\n",
1003                              pdata->dev_irq);
1004                 return ret;
1005         }
1006
1007         if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq)) {
1008                 ret = devm_request_irq(pdata->dev, pdata->ecc_irq, xgbe_ecc_isr,
1009                                        0, pdata->ecc_name, pdata);
1010                 if (ret) {
1011                         netdev_alert(netdev, "error requesting ecc irq %d\n",
1012                                      pdata->ecc_irq);
1013                         goto err_dev_irq;
1014                 }
1015         }
1016
1017         if (!pdata->per_channel_irq)
1018                 return 0;
1019
1020         for (i = 0; i < pdata->channel_count; i++) {
1021                 channel = pdata->channel[i];
1022                 snprintf(channel->dma_irq_name,
1023                          sizeof(channel->dma_irq_name) - 1,
1024                          "%s-TxRx-%u", netdev_name(netdev),
1025                          channel->queue_index);
1026
1027                 ret = devm_request_irq(pdata->dev, channel->dma_irq,
1028                                        xgbe_dma_isr, 0,
1029                                        channel->dma_irq_name, channel);
1030                 if (ret) {
1031                         netdev_alert(netdev, "error requesting irq %d\n",
1032                                      channel->dma_irq);
1033                         goto err_dma_irq;
1034                 }
1035
1036                 irq_set_affinity_hint(channel->dma_irq,
1037                                       &channel->affinity_mask);
1038         }
1039
1040         return 0;
1041
1042 err_dma_irq:
1043         /* Using an unsigned int, 'i' will go to UINT_MAX and exit */
1044         for (i--; i < pdata->channel_count; i--) {
1045                 channel = pdata->channel[i];
1046
1047                 irq_set_affinity_hint(channel->dma_irq, NULL);
1048                 devm_free_irq(pdata->dev, channel->dma_irq, channel);
1049         }
1050
1051         if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq))
1052                 devm_free_irq(pdata->dev, pdata->ecc_irq, pdata);
1053
1054 err_dev_irq:
1055         devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
1056
1057         return ret;
1058 }
1059
1060 static void xgbe_free_irqs(struct xgbe_prv_data *pdata)
1061 {
1062         struct xgbe_channel *channel;
1063         unsigned int i;
1064
1065         devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
1066
1067         if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq))
1068                 devm_free_irq(pdata->dev, pdata->ecc_irq, pdata);
1069
1070         if (!pdata->per_channel_irq)
1071                 return;
1072
1073         for (i = 0; i < pdata->channel_count; i++) {
1074                 channel = pdata->channel[i];
1075
1076                 irq_set_affinity_hint(channel->dma_irq, NULL);
1077                 devm_free_irq(pdata->dev, channel->dma_irq, channel);
1078         }
1079 }
1080
1081 void xgbe_init_tx_coalesce(struct xgbe_prv_data *pdata)
1082 {
1083         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1084
1085         DBGPR("-->xgbe_init_tx_coalesce\n");
1086
1087         pdata->tx_usecs = XGMAC_INIT_DMA_TX_USECS;
1088         pdata->tx_frames = XGMAC_INIT_DMA_TX_FRAMES;
1089
1090         hw_if->config_tx_coalesce(pdata);
1091
1092         DBGPR("<--xgbe_init_tx_coalesce\n");
1093 }
1094
1095 void xgbe_init_rx_coalesce(struct xgbe_prv_data *pdata)
1096 {
1097         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1098
1099         DBGPR("-->xgbe_init_rx_coalesce\n");
1100
1101         pdata->rx_riwt = hw_if->usec_to_riwt(pdata, XGMAC_INIT_DMA_RX_USECS);
1102         pdata->rx_usecs = XGMAC_INIT_DMA_RX_USECS;
1103         pdata->rx_frames = XGMAC_INIT_DMA_RX_FRAMES;
1104
1105         hw_if->config_rx_coalesce(pdata);
1106
1107         DBGPR("<--xgbe_init_rx_coalesce\n");
1108 }
1109
1110 static void xgbe_free_tx_data(struct xgbe_prv_data *pdata)
1111 {
1112         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1113         struct xgbe_ring *ring;
1114         struct xgbe_ring_data *rdata;
1115         unsigned int i, j;
1116
1117         DBGPR("-->xgbe_free_tx_data\n");
1118
1119         for (i = 0; i < pdata->channel_count; i++) {
1120                 ring = pdata->channel[i]->tx_ring;
1121                 if (!ring)
1122                         break;
1123
1124                 for (j = 0; j < ring->rdesc_count; j++) {
1125                         rdata = XGBE_GET_DESC_DATA(ring, j);
1126                         desc_if->unmap_rdata(pdata, rdata);
1127                 }
1128         }
1129
1130         DBGPR("<--xgbe_free_tx_data\n");
1131 }
1132
1133 static void xgbe_free_rx_data(struct xgbe_prv_data *pdata)
1134 {
1135         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1136         struct xgbe_ring *ring;
1137         struct xgbe_ring_data *rdata;
1138         unsigned int i, j;
1139
1140         DBGPR("-->xgbe_free_rx_data\n");
1141
1142         for (i = 0; i < pdata->channel_count; i++) {
1143                 ring = pdata->channel[i]->rx_ring;
1144                 if (!ring)
1145                         break;
1146
1147                 for (j = 0; j < ring->rdesc_count; j++) {
1148                         rdata = XGBE_GET_DESC_DATA(ring, j);
1149                         desc_if->unmap_rdata(pdata, rdata);
1150                 }
1151         }
1152
1153         DBGPR("<--xgbe_free_rx_data\n");
1154 }
1155
1156 static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
1157 {
1158         pdata->phy_link = -1;
1159         pdata->phy_speed = SPEED_UNKNOWN;
1160
1161         return pdata->phy_if.phy_reset(pdata);
1162 }
1163
1164 int xgbe_powerdown(struct net_device *netdev, unsigned int caller)
1165 {
1166         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1167         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1168         unsigned long flags;
1169
1170         DBGPR("-->xgbe_powerdown\n");
1171
1172         if (!netif_running(netdev) ||
1173             (caller == XGMAC_IOCTL_CONTEXT && pdata->power_down)) {
1174                 netdev_alert(netdev, "Device is already powered down\n");
1175                 DBGPR("<--xgbe_powerdown\n");
1176                 return -EINVAL;
1177         }
1178
1179         spin_lock_irqsave(&pdata->lock, flags);
1180
1181         if (caller == XGMAC_DRIVER_CONTEXT)
1182                 netif_device_detach(netdev);
1183
1184         netif_tx_stop_all_queues(netdev);
1185
1186         xgbe_stop_timers(pdata);
1187         flush_workqueue(pdata->dev_workqueue);
1188
1189         hw_if->powerdown_tx(pdata);
1190         hw_if->powerdown_rx(pdata);
1191
1192         xgbe_napi_disable(pdata, 0);
1193
1194         pdata->power_down = 1;
1195
1196         spin_unlock_irqrestore(&pdata->lock, flags);
1197
1198         DBGPR("<--xgbe_powerdown\n");
1199
1200         return 0;
1201 }
1202
1203 int xgbe_powerup(struct net_device *netdev, unsigned int caller)
1204 {
1205         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1206         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1207         unsigned long flags;
1208
1209         DBGPR("-->xgbe_powerup\n");
1210
1211         if (!netif_running(netdev) ||
1212             (caller == XGMAC_IOCTL_CONTEXT && !pdata->power_down)) {
1213                 netdev_alert(netdev, "Device is already powered up\n");
1214                 DBGPR("<--xgbe_powerup\n");
1215                 return -EINVAL;
1216         }
1217
1218         spin_lock_irqsave(&pdata->lock, flags);
1219
1220         pdata->power_down = 0;
1221
1222         xgbe_napi_enable(pdata, 0);
1223
1224         hw_if->powerup_tx(pdata);
1225         hw_if->powerup_rx(pdata);
1226
1227         if (caller == XGMAC_DRIVER_CONTEXT)
1228                 netif_device_attach(netdev);
1229
1230         netif_tx_start_all_queues(netdev);
1231
1232         xgbe_start_timers(pdata);
1233
1234         spin_unlock_irqrestore(&pdata->lock, flags);
1235
1236         DBGPR("<--xgbe_powerup\n");
1237
1238         return 0;
1239 }
1240
1241 static void xgbe_free_memory(struct xgbe_prv_data *pdata)
1242 {
1243         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1244
1245         /* Free the ring descriptors and buffers */
1246         desc_if->free_ring_resources(pdata);
1247
1248         /* Free the channel and ring structures */
1249         xgbe_free_channels(pdata);
1250 }
1251
1252 static int xgbe_alloc_memory(struct xgbe_prv_data *pdata)
1253 {
1254         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1255         struct net_device *netdev = pdata->netdev;
1256         int ret;
1257
1258         if (pdata->new_tx_ring_count) {
1259                 pdata->tx_ring_count = pdata->new_tx_ring_count;
1260                 pdata->tx_q_count = pdata->tx_ring_count;
1261                 pdata->new_tx_ring_count = 0;
1262         }
1263
1264         if (pdata->new_rx_ring_count) {
1265                 pdata->rx_ring_count = pdata->new_rx_ring_count;
1266                 pdata->new_rx_ring_count = 0;
1267         }
1268
1269         /* Calculate the Rx buffer size before allocating rings */
1270         pdata->rx_buf_size = xgbe_calc_rx_buf_size(netdev, netdev->mtu);
1271
1272         /* Allocate the channel and ring structures */
1273         ret = xgbe_alloc_channels(pdata);
1274         if (ret)
1275                 return ret;
1276
1277         /* Allocate the ring descriptors and buffers */
1278         ret = desc_if->alloc_ring_resources(pdata);
1279         if (ret)
1280                 goto err_channels;
1281
1282         /* Initialize the service and Tx timers */
1283         xgbe_init_timers(pdata);
1284
1285         return 0;
1286
1287 err_channels:
1288         xgbe_free_memory(pdata);
1289
1290         return ret;
1291 }
1292
1293 static int xgbe_start(struct xgbe_prv_data *pdata)
1294 {
1295         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1296         struct xgbe_phy_if *phy_if = &pdata->phy_if;
1297         struct net_device *netdev = pdata->netdev;
1298         unsigned int i;
1299         int ret;
1300
1301         /* Set the number of queues */
1302         ret = netif_set_real_num_tx_queues(netdev, pdata->tx_ring_count);
1303         if (ret) {
1304                 netdev_err(netdev, "error setting real tx queue count\n");
1305                 return ret;
1306         }
1307
1308         ret = netif_set_real_num_rx_queues(netdev, pdata->rx_ring_count);
1309         if (ret) {
1310                 netdev_err(netdev, "error setting real rx queue count\n");
1311                 return ret;
1312         }
1313
1314         /* Set RSS lookup table data for programming */
1315         for (i = 0; i < XGBE_RSS_MAX_TABLE_SIZE; i++)
1316                 XGMAC_SET_BITS(pdata->rss_table[i], MAC_RSSDR, DMCH,
1317                                i % pdata->rx_ring_count);
1318
1319         ret = hw_if->init(pdata);
1320         if (ret)
1321                 return ret;
1322
1323         xgbe_napi_enable(pdata, 1);
1324
1325         ret = xgbe_request_irqs(pdata);
1326         if (ret)
1327                 goto err_napi;
1328
1329         ret = phy_if->phy_start(pdata);
1330         if (ret)
1331                 goto err_irqs;
1332
1333         hw_if->enable_tx(pdata);
1334         hw_if->enable_rx(pdata);
1335
1336         udp_tunnel_nic_reset_ntf(netdev);
1337
1338         netif_tx_start_all_queues(netdev);
1339
1340         xgbe_start_timers(pdata);
1341         queue_work(pdata->dev_workqueue, &pdata->service_work);
1342
1343         clear_bit(XGBE_STOPPED, &pdata->dev_state);
1344
1345         return 0;
1346
1347 err_irqs:
1348         xgbe_free_irqs(pdata);
1349
1350 err_napi:
1351         xgbe_napi_disable(pdata, 1);
1352
1353         hw_if->exit(pdata);
1354
1355         return ret;
1356 }
1357
1358 static void xgbe_stop(struct xgbe_prv_data *pdata)
1359 {
1360         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1361         struct xgbe_phy_if *phy_if = &pdata->phy_if;
1362         struct xgbe_channel *channel;
1363         struct net_device *netdev = pdata->netdev;
1364         struct netdev_queue *txq;
1365         unsigned int i;
1366
1367         DBGPR("-->xgbe_stop\n");
1368
1369         if (test_bit(XGBE_STOPPED, &pdata->dev_state))
1370                 return;
1371
1372         netif_tx_stop_all_queues(netdev);
1373         netif_carrier_off(pdata->netdev);
1374
1375         xgbe_stop_timers(pdata);
1376         flush_workqueue(pdata->dev_workqueue);
1377
1378         xgbe_vxlan_unset_port(netdev, 0, 0, NULL);
1379
1380         hw_if->disable_tx(pdata);
1381         hw_if->disable_rx(pdata);
1382
1383         phy_if->phy_stop(pdata);
1384
1385         xgbe_free_irqs(pdata);
1386
1387         xgbe_napi_disable(pdata, 1);
1388
1389         hw_if->exit(pdata);
1390
1391         for (i = 0; i < pdata->channel_count; i++) {
1392                 channel = pdata->channel[i];
1393                 if (!channel->tx_ring)
1394                         continue;
1395
1396                 txq = netdev_get_tx_queue(netdev, channel->queue_index);
1397                 netdev_tx_reset_queue(txq);
1398         }
1399
1400         set_bit(XGBE_STOPPED, &pdata->dev_state);
1401
1402         DBGPR("<--xgbe_stop\n");
1403 }
1404
1405 static void xgbe_stopdev(struct work_struct *work)
1406 {
1407         struct xgbe_prv_data *pdata = container_of(work,
1408                                                    struct xgbe_prv_data,
1409                                                    stopdev_work);
1410
1411         rtnl_lock();
1412
1413         xgbe_stop(pdata);
1414
1415         xgbe_free_tx_data(pdata);
1416         xgbe_free_rx_data(pdata);
1417
1418         rtnl_unlock();
1419
1420         netdev_alert(pdata->netdev, "device stopped\n");
1421 }
1422
1423 void xgbe_full_restart_dev(struct xgbe_prv_data *pdata)
1424 {
1425         /* If not running, "restart" will happen on open */
1426         if (!netif_running(pdata->netdev))
1427                 return;
1428
1429         xgbe_stop(pdata);
1430
1431         xgbe_free_memory(pdata);
1432         xgbe_alloc_memory(pdata);
1433
1434         xgbe_start(pdata);
1435 }
1436
1437 void xgbe_restart_dev(struct xgbe_prv_data *pdata)
1438 {
1439         /* If not running, "restart" will happen on open */
1440         if (!netif_running(pdata->netdev))
1441                 return;
1442
1443         xgbe_stop(pdata);
1444
1445         xgbe_free_tx_data(pdata);
1446         xgbe_free_rx_data(pdata);
1447
1448         xgbe_start(pdata);
1449 }
1450
1451 static void xgbe_restart(struct work_struct *work)
1452 {
1453         struct xgbe_prv_data *pdata = container_of(work,
1454                                                    struct xgbe_prv_data,
1455                                                    restart_work);
1456
1457         rtnl_lock();
1458
1459         xgbe_restart_dev(pdata);
1460
1461         rtnl_unlock();
1462 }
1463
1464 static void xgbe_tx_tstamp(struct work_struct *work)
1465 {
1466         struct xgbe_prv_data *pdata = container_of(work,
1467                                                    struct xgbe_prv_data,
1468                                                    tx_tstamp_work);
1469         struct skb_shared_hwtstamps hwtstamps;
1470         u64 nsec;
1471         unsigned long flags;
1472
1473         spin_lock_irqsave(&pdata->tstamp_lock, flags);
1474         if (!pdata->tx_tstamp_skb)
1475                 goto unlock;
1476
1477         if (pdata->tx_tstamp) {
1478                 nsec = timecounter_cyc2time(&pdata->tstamp_tc,
1479                                             pdata->tx_tstamp);
1480
1481                 memset(&hwtstamps, 0, sizeof(hwtstamps));
1482                 hwtstamps.hwtstamp = ns_to_ktime(nsec);
1483                 skb_tstamp_tx(pdata->tx_tstamp_skb, &hwtstamps);
1484         }
1485
1486         dev_kfree_skb_any(pdata->tx_tstamp_skb);
1487
1488         pdata->tx_tstamp_skb = NULL;
1489
1490 unlock:
1491         spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
1492 }
1493
1494 static int xgbe_get_hwtstamp_settings(struct xgbe_prv_data *pdata,
1495                                       struct ifreq *ifreq)
1496 {
1497         if (copy_to_user(ifreq->ifr_data, &pdata->tstamp_config,
1498                          sizeof(pdata->tstamp_config)))
1499                 return -EFAULT;
1500
1501         return 0;
1502 }
1503
1504 static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata,
1505                                       struct ifreq *ifreq)
1506 {
1507         struct hwtstamp_config config;
1508         unsigned int mac_tscr;
1509
1510         if (copy_from_user(&config, ifreq->ifr_data, sizeof(config)))
1511                 return -EFAULT;
1512
1513         if (config.flags)
1514                 return -EINVAL;
1515
1516         mac_tscr = 0;
1517
1518         switch (config.tx_type) {
1519         case HWTSTAMP_TX_OFF:
1520                 break;
1521
1522         case HWTSTAMP_TX_ON:
1523                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1524                 break;
1525
1526         default:
1527                 return -ERANGE;
1528         }
1529
1530         switch (config.rx_filter) {
1531         case HWTSTAMP_FILTER_NONE:
1532                 break;
1533
1534         case HWTSTAMP_FILTER_NTP_ALL:
1535         case HWTSTAMP_FILTER_ALL:
1536                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 1);
1537                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1538                 break;
1539
1540         /* PTP v2, UDP, any kind of event packet */
1541         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1542                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1543                 fallthrough;    /* to PTP v1, UDP, any kind of event packet */
1544         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1545                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1546                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1547                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1548                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1549                 break;
1550
1551         /* PTP v2, UDP, Sync packet */
1552         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1553                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1554                 fallthrough;    /* to PTP v1, UDP, Sync packet */
1555         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1556                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1557                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1558                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1559                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1560                 break;
1561
1562         /* PTP v2, UDP, Delay_req packet */
1563         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1564                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1565                 fallthrough;    /* to PTP v1, UDP, Delay_req packet */
1566         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1567                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1568                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1569                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1570                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1571                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1572                 break;
1573
1574         /* 802.AS1, Ethernet, any kind of event packet */
1575         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1576                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1577                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1578                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1579                 break;
1580
1581         /* 802.AS1, Ethernet, Sync packet */
1582         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1583                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1584                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1585                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1586                 break;
1587
1588         /* 802.AS1, Ethernet, Delay_req packet */
1589         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1590                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1591                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1592                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1593                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1594                 break;
1595
1596         /* PTP v2/802.AS1, any layer, any kind of event packet */
1597         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1598                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1599                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1600                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1601                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1602                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1603                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1604                 break;
1605
1606         /* PTP v2/802.AS1, any layer, Sync packet */
1607         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1608                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1609                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1610                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1611                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1612                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1613                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1614                 break;
1615
1616         /* PTP v2/802.AS1, any layer, Delay_req packet */
1617         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1618                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1619                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1620                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1621                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1622                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1623                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1624                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1625                 break;
1626
1627         default:
1628                 return -ERANGE;
1629         }
1630
1631         pdata->hw_if.config_tstamp(pdata, mac_tscr);
1632
1633         memcpy(&pdata->tstamp_config, &config, sizeof(config));
1634
1635         return 0;
1636 }
1637
1638 static void xgbe_prep_tx_tstamp(struct xgbe_prv_data *pdata,
1639                                 struct sk_buff *skb,
1640                                 struct xgbe_packet_data *packet)
1641 {
1642         unsigned long flags;
1643
1644         if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP)) {
1645                 spin_lock_irqsave(&pdata->tstamp_lock, flags);
1646                 if (pdata->tx_tstamp_skb) {
1647                         /* Another timestamp in progress, ignore this one */
1648                         XGMAC_SET_BITS(packet->attributes,
1649                                        TX_PACKET_ATTRIBUTES, PTP, 0);
1650                 } else {
1651                         pdata->tx_tstamp_skb = skb_get(skb);
1652                         skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1653                 }
1654                 spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
1655         }
1656
1657         skb_tx_timestamp(skb);
1658 }
1659
1660 static void xgbe_prep_vlan(struct sk_buff *skb, struct xgbe_packet_data *packet)
1661 {
1662         if (skb_vlan_tag_present(skb))
1663                 packet->vlan_ctag = skb_vlan_tag_get(skb);
1664 }
1665
1666 static int xgbe_prep_tso(struct sk_buff *skb, struct xgbe_packet_data *packet)
1667 {
1668         int ret;
1669
1670         if (!XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1671                             TSO_ENABLE))
1672                 return 0;
1673
1674         ret = skb_cow_head(skb, 0);
1675         if (ret)
1676                 return ret;
1677
1678         if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, VXLAN)) {
1679                 packet->header_len = skb_inner_transport_offset(skb) +
1680                                      inner_tcp_hdrlen(skb);
1681                 packet->tcp_header_len = inner_tcp_hdrlen(skb);
1682         } else {
1683                 packet->header_len = skb_transport_offset(skb) +
1684                                      tcp_hdrlen(skb);
1685                 packet->tcp_header_len = tcp_hdrlen(skb);
1686         }
1687         packet->tcp_payload_len = skb->len - packet->header_len;
1688         packet->mss = skb_shinfo(skb)->gso_size;
1689
1690         DBGPR("  packet->header_len=%u\n", packet->header_len);
1691         DBGPR("  packet->tcp_header_len=%u, packet->tcp_payload_len=%u\n",
1692               packet->tcp_header_len, packet->tcp_payload_len);
1693         DBGPR("  packet->mss=%u\n", packet->mss);
1694
1695         /* Update the number of packets that will ultimately be transmitted
1696          * along with the extra bytes for each extra packet
1697          */
1698         packet->tx_packets = skb_shinfo(skb)->gso_segs;
1699         packet->tx_bytes += (packet->tx_packets - 1) * packet->header_len;
1700
1701         return 0;
1702 }
1703
1704 static bool xgbe_is_vxlan(struct sk_buff *skb)
1705 {
1706         if (!skb->encapsulation)
1707                 return false;
1708
1709         if (skb->ip_summed != CHECKSUM_PARTIAL)
1710                 return false;
1711
1712         switch (skb->protocol) {
1713         case htons(ETH_P_IP):
1714                 if (ip_hdr(skb)->protocol != IPPROTO_UDP)
1715                         return false;
1716                 break;
1717
1718         case htons(ETH_P_IPV6):
1719                 if (ipv6_hdr(skb)->nexthdr != IPPROTO_UDP)
1720                         return false;
1721                 break;
1722
1723         default:
1724                 return false;
1725         }
1726
1727         if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
1728             skb->inner_protocol != htons(ETH_P_TEB) ||
1729             (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
1730              sizeof(struct udphdr) + sizeof(struct vxlanhdr)))
1731                 return false;
1732
1733         return true;
1734 }
1735
1736 static int xgbe_is_tso(struct sk_buff *skb)
1737 {
1738         if (skb->ip_summed != CHECKSUM_PARTIAL)
1739                 return 0;
1740
1741         if (!skb_is_gso(skb))
1742                 return 0;
1743
1744         DBGPR("  TSO packet to be processed\n");
1745
1746         return 1;
1747 }
1748
1749 static void xgbe_packet_info(struct xgbe_prv_data *pdata,
1750                              struct xgbe_ring *ring, struct sk_buff *skb,
1751                              struct xgbe_packet_data *packet)
1752 {
1753         skb_frag_t *frag;
1754         unsigned int context_desc;
1755         unsigned int len;
1756         unsigned int i;
1757
1758         packet->skb = skb;
1759
1760         context_desc = 0;
1761         packet->rdesc_count = 0;
1762
1763         packet->tx_packets = 1;
1764         packet->tx_bytes = skb->len;
1765
1766         if (xgbe_is_tso(skb)) {
1767                 /* TSO requires an extra descriptor if mss is different */
1768                 if (skb_shinfo(skb)->gso_size != ring->tx.cur_mss) {
1769                         context_desc = 1;
1770                         packet->rdesc_count++;
1771                 }
1772
1773                 /* TSO requires an extra descriptor for TSO header */
1774                 packet->rdesc_count++;
1775
1776                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1777                                TSO_ENABLE, 1);
1778                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1779                                CSUM_ENABLE, 1);
1780         } else if (skb->ip_summed == CHECKSUM_PARTIAL)
1781                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1782                                CSUM_ENABLE, 1);
1783
1784         if (xgbe_is_vxlan(skb))
1785                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1786                                VXLAN, 1);
1787
1788         if (skb_vlan_tag_present(skb)) {
1789                 /* VLAN requires an extra descriptor if tag is different */
1790                 if (skb_vlan_tag_get(skb) != ring->tx.cur_vlan_ctag)
1791                         /* We can share with the TSO context descriptor */
1792                         if (!context_desc) {
1793                                 context_desc = 1;
1794                                 packet->rdesc_count++;
1795                         }
1796
1797                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1798                                VLAN_CTAG, 1);
1799         }
1800
1801         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1802             (pdata->tstamp_config.tx_type == HWTSTAMP_TX_ON))
1803                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1804                                PTP, 1);
1805
1806         for (len = skb_headlen(skb); len;) {
1807                 packet->rdesc_count++;
1808                 len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
1809         }
1810
1811         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1812                 frag = &skb_shinfo(skb)->frags[i];
1813                 for (len = skb_frag_size(frag); len; ) {
1814                         packet->rdesc_count++;
1815                         len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
1816                 }
1817         }
1818 }
1819
1820 static int xgbe_open(struct net_device *netdev)
1821 {
1822         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1823         int ret;
1824
1825         /* Create the various names based on netdev name */
1826         snprintf(pdata->an_name, sizeof(pdata->an_name) - 1, "%s-pcs",
1827                  netdev_name(netdev));
1828
1829         snprintf(pdata->ecc_name, sizeof(pdata->ecc_name) - 1, "%s-ecc",
1830                  netdev_name(netdev));
1831
1832         snprintf(pdata->i2c_name, sizeof(pdata->i2c_name) - 1, "%s-i2c",
1833                  netdev_name(netdev));
1834
1835         /* Create workqueues */
1836         pdata->dev_workqueue =
1837                 create_singlethread_workqueue(netdev_name(netdev));
1838         if (!pdata->dev_workqueue) {
1839                 netdev_err(netdev, "device workqueue creation failed\n");
1840                 return -ENOMEM;
1841         }
1842
1843         pdata->an_workqueue =
1844                 create_singlethread_workqueue(pdata->an_name);
1845         if (!pdata->an_workqueue) {
1846                 netdev_err(netdev, "phy workqueue creation failed\n");
1847                 ret = -ENOMEM;
1848                 goto err_dev_wq;
1849         }
1850
1851         /* Reset the phy settings */
1852         ret = xgbe_phy_reset(pdata);
1853         if (ret)
1854                 goto err_an_wq;
1855
1856         /* Enable the clocks */
1857         ret = clk_prepare_enable(pdata->sysclk);
1858         if (ret) {
1859                 netdev_alert(netdev, "dma clk_prepare_enable failed\n");
1860                 goto err_an_wq;
1861         }
1862
1863         ret = clk_prepare_enable(pdata->ptpclk);
1864         if (ret) {
1865                 netdev_alert(netdev, "ptp clk_prepare_enable failed\n");
1866                 goto err_sysclk;
1867         }
1868
1869         INIT_WORK(&pdata->service_work, xgbe_service);
1870         INIT_WORK(&pdata->restart_work, xgbe_restart);
1871         INIT_WORK(&pdata->stopdev_work, xgbe_stopdev);
1872         INIT_WORK(&pdata->tx_tstamp_work, xgbe_tx_tstamp);
1873
1874         ret = xgbe_alloc_memory(pdata);
1875         if (ret)
1876                 goto err_ptpclk;
1877
1878         ret = xgbe_start(pdata);
1879         if (ret)
1880                 goto err_mem;
1881
1882         clear_bit(XGBE_DOWN, &pdata->dev_state);
1883
1884         return 0;
1885
1886 err_mem:
1887         xgbe_free_memory(pdata);
1888
1889 err_ptpclk:
1890         clk_disable_unprepare(pdata->ptpclk);
1891
1892 err_sysclk:
1893         clk_disable_unprepare(pdata->sysclk);
1894
1895 err_an_wq:
1896         destroy_workqueue(pdata->an_workqueue);
1897
1898 err_dev_wq:
1899         destroy_workqueue(pdata->dev_workqueue);
1900
1901         return ret;
1902 }
1903
1904 static int xgbe_close(struct net_device *netdev)
1905 {
1906         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1907
1908         /* Stop the device */
1909         xgbe_stop(pdata);
1910
1911         xgbe_free_memory(pdata);
1912
1913         /* Disable the clocks */
1914         clk_disable_unprepare(pdata->ptpclk);
1915         clk_disable_unprepare(pdata->sysclk);
1916
1917         flush_workqueue(pdata->an_workqueue);
1918         destroy_workqueue(pdata->an_workqueue);
1919
1920         flush_workqueue(pdata->dev_workqueue);
1921         destroy_workqueue(pdata->dev_workqueue);
1922
1923         set_bit(XGBE_DOWN, &pdata->dev_state);
1924
1925         return 0;
1926 }
1927
1928 static netdev_tx_t xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
1929 {
1930         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1931         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1932         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1933         struct xgbe_channel *channel;
1934         struct xgbe_ring *ring;
1935         struct xgbe_packet_data *packet;
1936         struct netdev_queue *txq;
1937         netdev_tx_t ret;
1938
1939         DBGPR("-->xgbe_xmit: skb->len = %d\n", skb->len);
1940
1941         channel = pdata->channel[skb->queue_mapping];
1942         txq = netdev_get_tx_queue(netdev, channel->queue_index);
1943         ring = channel->tx_ring;
1944         packet = &ring->packet_data;
1945
1946         ret = NETDEV_TX_OK;
1947
1948         if (skb->len == 0) {
1949                 netif_err(pdata, tx_err, netdev,
1950                           "empty skb received from stack\n");
1951                 dev_kfree_skb_any(skb);
1952                 goto tx_netdev_return;
1953         }
1954
1955         /* Calculate preliminary packet info */
1956         memset(packet, 0, sizeof(*packet));
1957         xgbe_packet_info(pdata, ring, skb, packet);
1958
1959         /* Check that there are enough descriptors available */
1960         ret = xgbe_maybe_stop_tx_queue(channel, ring, packet->rdesc_count);
1961         if (ret)
1962                 goto tx_netdev_return;
1963
1964         ret = xgbe_prep_tso(skb, packet);
1965         if (ret) {
1966                 netif_err(pdata, tx_err, netdev,
1967                           "error processing TSO packet\n");
1968                 dev_kfree_skb_any(skb);
1969                 goto tx_netdev_return;
1970         }
1971         xgbe_prep_vlan(skb, packet);
1972
1973         if (!desc_if->map_tx_skb(channel, skb)) {
1974                 dev_kfree_skb_any(skb);
1975                 goto tx_netdev_return;
1976         }
1977
1978         xgbe_prep_tx_tstamp(pdata, skb, packet);
1979
1980         /* Report on the actual number of bytes (to be) sent */
1981         netdev_tx_sent_queue(txq, packet->tx_bytes);
1982
1983         /* Configure required descriptor fields for transmission */
1984         hw_if->dev_xmit(channel);
1985
1986         if (netif_msg_pktdata(pdata))
1987                 xgbe_print_pkt(netdev, skb, true);
1988
1989         /* Stop the queue in advance if there may not be enough descriptors */
1990         xgbe_maybe_stop_tx_queue(channel, ring, XGBE_TX_MAX_DESCS);
1991
1992         ret = NETDEV_TX_OK;
1993
1994 tx_netdev_return:
1995         return ret;
1996 }
1997
1998 static void xgbe_set_rx_mode(struct net_device *netdev)
1999 {
2000         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2001         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2002
2003         DBGPR("-->xgbe_set_rx_mode\n");
2004
2005         hw_if->config_rx_mode(pdata);
2006
2007         DBGPR("<--xgbe_set_rx_mode\n");
2008 }
2009
2010 static int xgbe_set_mac_address(struct net_device *netdev, void *addr)
2011 {
2012         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2013         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2014         struct sockaddr *saddr = addr;
2015
2016         DBGPR("-->xgbe_set_mac_address\n");
2017
2018         if (!is_valid_ether_addr(saddr->sa_data))
2019                 return -EADDRNOTAVAIL;
2020
2021         memcpy(netdev->dev_addr, saddr->sa_data, netdev->addr_len);
2022
2023         hw_if->set_mac_address(pdata, netdev->dev_addr);
2024
2025         DBGPR("<--xgbe_set_mac_address\n");
2026
2027         return 0;
2028 }
2029
2030 static int xgbe_ioctl(struct net_device *netdev, struct ifreq *ifreq, int cmd)
2031 {
2032         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2033         int ret;
2034
2035         switch (cmd) {
2036         case SIOCGHWTSTAMP:
2037                 ret = xgbe_get_hwtstamp_settings(pdata, ifreq);
2038                 break;
2039
2040         case SIOCSHWTSTAMP:
2041                 ret = xgbe_set_hwtstamp_settings(pdata, ifreq);
2042                 break;
2043
2044         default:
2045                 ret = -EOPNOTSUPP;
2046         }
2047
2048         return ret;
2049 }
2050
2051 static int xgbe_change_mtu(struct net_device *netdev, int mtu)
2052 {
2053         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2054         int ret;
2055
2056         DBGPR("-->xgbe_change_mtu\n");
2057
2058         ret = xgbe_calc_rx_buf_size(netdev, mtu);
2059         if (ret < 0)
2060                 return ret;
2061
2062         pdata->rx_buf_size = ret;
2063         netdev->mtu = mtu;
2064
2065         xgbe_restart_dev(pdata);
2066
2067         DBGPR("<--xgbe_change_mtu\n");
2068
2069         return 0;
2070 }
2071
2072 static void xgbe_tx_timeout(struct net_device *netdev, unsigned int txqueue)
2073 {
2074         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2075
2076         netdev_warn(netdev, "tx timeout, device restarting\n");
2077         schedule_work(&pdata->restart_work);
2078 }
2079
2080 static void xgbe_get_stats64(struct net_device *netdev,
2081                              struct rtnl_link_stats64 *s)
2082 {
2083         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2084         struct xgbe_mmc_stats *pstats = &pdata->mmc_stats;
2085
2086         DBGPR("-->%s\n", __func__);
2087
2088         pdata->hw_if.read_mmc_stats(pdata);
2089
2090         s->rx_packets = pstats->rxframecount_gb;
2091         s->rx_bytes = pstats->rxoctetcount_gb;
2092         s->rx_errors = pstats->rxframecount_gb -
2093                        pstats->rxbroadcastframes_g -
2094                        pstats->rxmulticastframes_g -
2095                        pstats->rxunicastframes_g;
2096         s->multicast = pstats->rxmulticastframes_g;
2097         s->rx_length_errors = pstats->rxlengtherror;
2098         s->rx_crc_errors = pstats->rxcrcerror;
2099         s->rx_fifo_errors = pstats->rxfifooverflow;
2100
2101         s->tx_packets = pstats->txframecount_gb;
2102         s->tx_bytes = pstats->txoctetcount_gb;
2103         s->tx_errors = pstats->txframecount_gb - pstats->txframecount_g;
2104         s->tx_dropped = netdev->stats.tx_dropped;
2105
2106         DBGPR("<--%s\n", __func__);
2107 }
2108
2109 static int xgbe_vlan_rx_add_vid(struct net_device *netdev, __be16 proto,
2110                                 u16 vid)
2111 {
2112         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2113         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2114
2115         DBGPR("-->%s\n", __func__);
2116
2117         set_bit(vid, pdata->active_vlans);
2118         hw_if->update_vlan_hash_table(pdata);
2119
2120         DBGPR("<--%s\n", __func__);
2121
2122         return 0;
2123 }
2124
2125 static int xgbe_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto,
2126                                  u16 vid)
2127 {
2128         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2129         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2130
2131         DBGPR("-->%s\n", __func__);
2132
2133         clear_bit(vid, pdata->active_vlans);
2134         hw_if->update_vlan_hash_table(pdata);
2135
2136         DBGPR("<--%s\n", __func__);
2137
2138         return 0;
2139 }
2140
2141 #ifdef CONFIG_NET_POLL_CONTROLLER
2142 static void xgbe_poll_controller(struct net_device *netdev)
2143 {
2144         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2145         struct xgbe_channel *channel;
2146         unsigned int i;
2147
2148         DBGPR("-->xgbe_poll_controller\n");
2149
2150         if (pdata->per_channel_irq) {
2151                 for (i = 0; i < pdata->channel_count; i++) {
2152                         channel = pdata->channel[i];
2153                         xgbe_dma_isr(channel->dma_irq, channel);
2154                 }
2155         } else {
2156                 disable_irq(pdata->dev_irq);
2157                 xgbe_isr(pdata->dev_irq, pdata);
2158                 enable_irq(pdata->dev_irq);
2159         }
2160
2161         DBGPR("<--xgbe_poll_controller\n");
2162 }
2163 #endif /* End CONFIG_NET_POLL_CONTROLLER */
2164
2165 static int xgbe_setup_tc(struct net_device *netdev, enum tc_setup_type type,
2166                          void *type_data)
2167 {
2168         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2169         struct tc_mqprio_qopt *mqprio = type_data;
2170         u8 tc;
2171
2172         if (type != TC_SETUP_QDISC_MQPRIO)
2173                 return -EOPNOTSUPP;
2174
2175         mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
2176         tc = mqprio->num_tc;
2177
2178         if (tc > pdata->hw_feat.tc_cnt)
2179                 return -EINVAL;
2180
2181         pdata->num_tcs = tc;
2182         pdata->hw_if.config_tc(pdata);
2183
2184         return 0;
2185 }
2186
2187 static netdev_features_t xgbe_fix_features(struct net_device *netdev,
2188                                            netdev_features_t features)
2189 {
2190         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2191         netdev_features_t vxlan_base;
2192
2193         vxlan_base = NETIF_F_GSO_UDP_TUNNEL | NETIF_F_RX_UDP_TUNNEL_PORT;
2194
2195         if (!pdata->hw_feat.vxn)
2196                 return features;
2197
2198         /* VXLAN CSUM requires VXLAN base */
2199         if ((features & NETIF_F_GSO_UDP_TUNNEL_CSUM) &&
2200             !(features & NETIF_F_GSO_UDP_TUNNEL)) {
2201                 netdev_notice(netdev,
2202                               "forcing tx udp tunnel support\n");
2203                 features |= NETIF_F_GSO_UDP_TUNNEL;
2204         }
2205
2206         /* Can't do one without doing the other */
2207         if ((features & vxlan_base) != vxlan_base) {
2208                 netdev_notice(netdev,
2209                               "forcing both tx and rx udp tunnel support\n");
2210                 features |= vxlan_base;
2211         }
2212
2213         if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
2214                 if (!(features & NETIF_F_GSO_UDP_TUNNEL_CSUM)) {
2215                         netdev_notice(netdev,
2216                                       "forcing tx udp tunnel checksumming on\n");
2217                         features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
2218                 }
2219         } else {
2220                 if (features & NETIF_F_GSO_UDP_TUNNEL_CSUM) {
2221                         netdev_notice(netdev,
2222                                       "forcing tx udp tunnel checksumming off\n");
2223                         features &= ~NETIF_F_GSO_UDP_TUNNEL_CSUM;
2224                 }
2225         }
2226
2227         return features;
2228 }
2229
2230 static int xgbe_set_features(struct net_device *netdev,
2231                              netdev_features_t features)
2232 {
2233         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2234         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2235         netdev_features_t rxhash, rxcsum, rxvlan, rxvlan_filter;
2236         int ret = 0;
2237
2238         rxhash = pdata->netdev_features & NETIF_F_RXHASH;
2239         rxcsum = pdata->netdev_features & NETIF_F_RXCSUM;
2240         rxvlan = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_RX;
2241         rxvlan_filter = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_FILTER;
2242
2243         if ((features & NETIF_F_RXHASH) && !rxhash)
2244                 ret = hw_if->enable_rss(pdata);
2245         else if (!(features & NETIF_F_RXHASH) && rxhash)
2246                 ret = hw_if->disable_rss(pdata);
2247         if (ret)
2248                 return ret;
2249
2250         if ((features & NETIF_F_RXCSUM) && !rxcsum)
2251                 hw_if->enable_rx_csum(pdata);
2252         else if (!(features & NETIF_F_RXCSUM) && rxcsum)
2253                 hw_if->disable_rx_csum(pdata);
2254
2255         if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan)
2256                 hw_if->enable_rx_vlan_stripping(pdata);
2257         else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) && rxvlan)
2258                 hw_if->disable_rx_vlan_stripping(pdata);
2259
2260         if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) && !rxvlan_filter)
2261                 hw_if->enable_rx_vlan_filtering(pdata);
2262         else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) && rxvlan_filter)
2263                 hw_if->disable_rx_vlan_filtering(pdata);
2264
2265         pdata->netdev_features = features;
2266
2267         DBGPR("<--xgbe_set_features\n");
2268
2269         return 0;
2270 }
2271
2272 static netdev_features_t xgbe_features_check(struct sk_buff *skb,
2273                                              struct net_device *netdev,
2274                                              netdev_features_t features)
2275 {
2276         features = vlan_features_check(skb, features);
2277         features = vxlan_features_check(skb, features);
2278
2279         return features;
2280 }
2281
2282 static const struct net_device_ops xgbe_netdev_ops = {
2283         .ndo_open               = xgbe_open,
2284         .ndo_stop               = xgbe_close,
2285         .ndo_start_xmit         = xgbe_xmit,
2286         .ndo_set_rx_mode        = xgbe_set_rx_mode,
2287         .ndo_set_mac_address    = xgbe_set_mac_address,
2288         .ndo_validate_addr      = eth_validate_addr,
2289         .ndo_eth_ioctl          = xgbe_ioctl,
2290         .ndo_change_mtu         = xgbe_change_mtu,
2291         .ndo_tx_timeout         = xgbe_tx_timeout,
2292         .ndo_get_stats64        = xgbe_get_stats64,
2293         .ndo_vlan_rx_add_vid    = xgbe_vlan_rx_add_vid,
2294         .ndo_vlan_rx_kill_vid   = xgbe_vlan_rx_kill_vid,
2295 #ifdef CONFIG_NET_POLL_CONTROLLER
2296         .ndo_poll_controller    = xgbe_poll_controller,
2297 #endif
2298         .ndo_setup_tc           = xgbe_setup_tc,
2299         .ndo_fix_features       = xgbe_fix_features,
2300         .ndo_set_features       = xgbe_set_features,
2301         .ndo_features_check     = xgbe_features_check,
2302 };
2303
2304 const struct net_device_ops *xgbe_get_netdev_ops(void)
2305 {
2306         return &xgbe_netdev_ops;
2307 }
2308
2309 static void xgbe_rx_refresh(struct xgbe_channel *channel)
2310 {
2311         struct xgbe_prv_data *pdata = channel->pdata;
2312         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2313         struct xgbe_desc_if *desc_if = &pdata->desc_if;
2314         struct xgbe_ring *ring = channel->rx_ring;
2315         struct xgbe_ring_data *rdata;
2316
2317         while (ring->dirty != ring->cur) {
2318                 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
2319
2320                 /* Reset rdata values */
2321                 desc_if->unmap_rdata(pdata, rdata);
2322
2323                 if (desc_if->map_rx_buffer(pdata, ring, rdata))
2324                         break;
2325
2326                 hw_if->rx_desc_reset(pdata, rdata, ring->dirty);
2327
2328                 ring->dirty++;
2329         }
2330
2331         /* Make sure everything is written before the register write */
2332         wmb();
2333
2334         /* Update the Rx Tail Pointer Register with address of
2335          * the last cleaned entry */
2336         rdata = XGBE_GET_DESC_DATA(ring, ring->dirty - 1);
2337         XGMAC_DMA_IOWRITE(channel, DMA_CH_RDTR_LO,
2338                           lower_32_bits(rdata->rdesc_dma));
2339 }
2340
2341 static struct sk_buff *xgbe_create_skb(struct xgbe_prv_data *pdata,
2342                                        struct napi_struct *napi,
2343                                        struct xgbe_ring_data *rdata,
2344                                        unsigned int len)
2345 {
2346         struct sk_buff *skb;
2347         u8 *packet;
2348
2349         skb = napi_alloc_skb(napi, rdata->rx.hdr.dma_len);
2350         if (!skb)
2351                 return NULL;
2352
2353         /* Pull in the header buffer which may contain just the header
2354          * or the header plus data
2355          */
2356         dma_sync_single_range_for_cpu(pdata->dev, rdata->rx.hdr.dma_base,
2357                                       rdata->rx.hdr.dma_off,
2358                                       rdata->rx.hdr.dma_len, DMA_FROM_DEVICE);
2359
2360         packet = page_address(rdata->rx.hdr.pa.pages) +
2361                  rdata->rx.hdr.pa.pages_offset;
2362         skb_copy_to_linear_data(skb, packet, len);
2363         skb_put(skb, len);
2364
2365         return skb;
2366 }
2367
2368 static unsigned int xgbe_rx_buf1_len(struct xgbe_ring_data *rdata,
2369                                      struct xgbe_packet_data *packet)
2370 {
2371         /* Always zero if not the first descriptor */
2372         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, FIRST))
2373                 return 0;
2374
2375         /* First descriptor with split header, return header length */
2376         if (rdata->rx.hdr_len)
2377                 return rdata->rx.hdr_len;
2378
2379         /* First descriptor but not the last descriptor and no split header,
2380          * so the full buffer was used
2381          */
2382         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, LAST))
2383                 return rdata->rx.hdr.dma_len;
2384
2385         /* First descriptor and last descriptor and no split header, so
2386          * calculate how much of the buffer was used
2387          */
2388         return min_t(unsigned int, rdata->rx.hdr.dma_len, rdata->rx.len);
2389 }
2390
2391 static unsigned int xgbe_rx_buf2_len(struct xgbe_ring_data *rdata,
2392                                      struct xgbe_packet_data *packet,
2393                                      unsigned int len)
2394 {
2395         /* Always the full buffer if not the last descriptor */
2396         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, LAST))
2397                 return rdata->rx.buf.dma_len;
2398
2399         /* Last descriptor so calculate how much of the buffer was used
2400          * for the last bit of data
2401          */
2402         return rdata->rx.len - len;
2403 }
2404
2405 static int xgbe_tx_poll(struct xgbe_channel *channel)
2406 {
2407         struct xgbe_prv_data *pdata = channel->pdata;
2408         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2409         struct xgbe_desc_if *desc_if = &pdata->desc_if;
2410         struct xgbe_ring *ring = channel->tx_ring;
2411         struct xgbe_ring_data *rdata;
2412         struct xgbe_ring_desc *rdesc;
2413         struct net_device *netdev = pdata->netdev;
2414         struct netdev_queue *txq;
2415         int processed = 0;
2416         unsigned int tx_packets = 0, tx_bytes = 0;
2417         unsigned int cur;
2418
2419         DBGPR("-->xgbe_tx_poll\n");
2420
2421         /* Nothing to do if there isn't a Tx ring for this channel */
2422         if (!ring)
2423                 return 0;
2424
2425         cur = ring->cur;
2426
2427         /* Be sure we get ring->cur before accessing descriptor data */
2428         smp_rmb();
2429
2430         txq = netdev_get_tx_queue(netdev, channel->queue_index);
2431
2432         while ((processed < XGBE_TX_DESC_MAX_PROC) &&
2433                (ring->dirty != cur)) {
2434                 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
2435                 rdesc = rdata->rdesc;
2436
2437                 if (!hw_if->tx_complete(rdesc))
2438                         break;
2439
2440                 /* Make sure descriptor fields are read after reading the OWN
2441                  * bit */
2442                 dma_rmb();
2443
2444                 if (netif_msg_tx_done(pdata))
2445                         xgbe_dump_tx_desc(pdata, ring, ring->dirty, 1, 0);
2446
2447                 if (hw_if->is_last_desc(rdesc)) {
2448                         tx_packets += rdata->tx.packets;
2449                         tx_bytes += rdata->tx.bytes;
2450                 }
2451
2452                 /* Free the SKB and reset the descriptor for re-use */
2453                 desc_if->unmap_rdata(pdata, rdata);
2454                 hw_if->tx_desc_reset(rdata);
2455
2456                 processed++;
2457                 ring->dirty++;
2458         }
2459
2460         if (!processed)
2461                 return 0;
2462
2463         netdev_tx_completed_queue(txq, tx_packets, tx_bytes);
2464
2465         if ((ring->tx.queue_stopped == 1) &&
2466             (xgbe_tx_avail_desc(ring) > XGBE_TX_DESC_MIN_FREE)) {
2467                 ring->tx.queue_stopped = 0;
2468                 netif_tx_wake_queue(txq);
2469         }
2470
2471         DBGPR("<--xgbe_tx_poll: processed=%d\n", processed);
2472
2473         return processed;
2474 }
2475
2476 static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
2477 {
2478         struct xgbe_prv_data *pdata = channel->pdata;
2479         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2480         struct xgbe_ring *ring = channel->rx_ring;
2481         struct xgbe_ring_data *rdata;
2482         struct xgbe_packet_data *packet;
2483         struct net_device *netdev = pdata->netdev;
2484         struct napi_struct *napi;
2485         struct sk_buff *skb;
2486         struct skb_shared_hwtstamps *hwtstamps;
2487         unsigned int last, error, context_next, context;
2488         unsigned int len, buf1_len, buf2_len, max_len;
2489         unsigned int received = 0;
2490         int packet_count = 0;
2491
2492         DBGPR("-->xgbe_rx_poll: budget=%d\n", budget);
2493
2494         /* Nothing to do if there isn't a Rx ring for this channel */
2495         if (!ring)
2496                 return 0;
2497
2498         last = 0;
2499         context_next = 0;
2500
2501         napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
2502
2503         rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2504         packet = &ring->packet_data;
2505         while (packet_count < budget) {
2506                 DBGPR("  cur = %d\n", ring->cur);
2507
2508                 /* First time in loop see if we need to restore state */
2509                 if (!received && rdata->state_saved) {
2510                         skb = rdata->state.skb;
2511                         error = rdata->state.error;
2512                         len = rdata->state.len;
2513                 } else {
2514                         memset(packet, 0, sizeof(*packet));
2515                         skb = NULL;
2516                         error = 0;
2517                         len = 0;
2518                 }
2519
2520 read_again:
2521                 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2522
2523                 if (xgbe_rx_dirty_desc(ring) > (XGBE_RX_DESC_CNT >> 3))
2524                         xgbe_rx_refresh(channel);
2525
2526                 if (hw_if->dev_read(channel))
2527                         break;
2528
2529                 received++;
2530                 ring->cur++;
2531
2532                 last = XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES,
2533                                       LAST);
2534                 context_next = XGMAC_GET_BITS(packet->attributes,
2535                                               RX_PACKET_ATTRIBUTES,
2536                                               CONTEXT_NEXT);
2537                 context = XGMAC_GET_BITS(packet->attributes,
2538                                          RX_PACKET_ATTRIBUTES,
2539                                          CONTEXT);
2540
2541                 /* Earlier error, just drain the remaining data */
2542                 if ((!last || context_next) && error)
2543                         goto read_again;
2544
2545                 if (error || packet->errors) {
2546                         if (packet->errors)
2547                                 netif_err(pdata, rx_err, netdev,
2548                                           "error in received packet\n");
2549                         dev_kfree_skb(skb);
2550                         goto next_packet;
2551                 }
2552
2553                 if (!context) {
2554                         /* Get the data length in the descriptor buffers */
2555                         buf1_len = xgbe_rx_buf1_len(rdata, packet);
2556                         len += buf1_len;
2557                         buf2_len = xgbe_rx_buf2_len(rdata, packet, len);
2558                         len += buf2_len;
2559
2560                         if (buf2_len > rdata->rx.buf.dma_len) {
2561                                 /* Hardware inconsistency within the descriptors
2562                                  * that has resulted in a length underflow.
2563                                  */
2564                                 error = 1;
2565                                 goto skip_data;
2566                         }
2567
2568                         if (!skb) {
2569                                 skb = xgbe_create_skb(pdata, napi, rdata,
2570                                                       buf1_len);
2571                                 if (!skb) {
2572                                         error = 1;
2573                                         goto skip_data;
2574                                 }
2575                         }
2576
2577                         if (buf2_len) {
2578                                 dma_sync_single_range_for_cpu(pdata->dev,
2579                                                         rdata->rx.buf.dma_base,
2580                                                         rdata->rx.buf.dma_off,
2581                                                         rdata->rx.buf.dma_len,
2582                                                         DMA_FROM_DEVICE);
2583
2584                                 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
2585                                                 rdata->rx.buf.pa.pages,
2586                                                 rdata->rx.buf.pa.pages_offset,
2587                                                 buf2_len,
2588                                                 rdata->rx.buf.dma_len);
2589                                 rdata->rx.buf.pa.pages = NULL;
2590                         }
2591                 }
2592
2593 skip_data:
2594                 if (!last || context_next)
2595                         goto read_again;
2596
2597                 if (!skb || error) {
2598                         dev_kfree_skb(skb);
2599                         goto next_packet;
2600                 }
2601
2602                 /* Be sure we don't exceed the configured MTU */
2603                 max_len = netdev->mtu + ETH_HLEN;
2604                 if (!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
2605                     (skb->protocol == htons(ETH_P_8021Q)))
2606                         max_len += VLAN_HLEN;
2607
2608                 if (skb->len > max_len) {
2609                         netif_err(pdata, rx_err, netdev,
2610                                   "packet length exceeds configured MTU\n");
2611                         dev_kfree_skb(skb);
2612                         goto next_packet;
2613                 }
2614
2615                 if (netif_msg_pktdata(pdata))
2616                         xgbe_print_pkt(netdev, skb, false);
2617
2618                 skb_checksum_none_assert(skb);
2619                 if (XGMAC_GET_BITS(packet->attributes,
2620                                    RX_PACKET_ATTRIBUTES, CSUM_DONE))
2621                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2622
2623                 if (XGMAC_GET_BITS(packet->attributes,
2624                                    RX_PACKET_ATTRIBUTES, TNP)) {
2625                         skb->encapsulation = 1;
2626
2627                         if (XGMAC_GET_BITS(packet->attributes,
2628                                            RX_PACKET_ATTRIBUTES, TNPCSUM_DONE))
2629                                 skb->csum_level = 1;
2630                 }
2631
2632                 if (XGMAC_GET_BITS(packet->attributes,
2633                                    RX_PACKET_ATTRIBUTES, VLAN_CTAG))
2634                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2635                                                packet->vlan_ctag);
2636
2637                 if (XGMAC_GET_BITS(packet->attributes,
2638                                    RX_PACKET_ATTRIBUTES, RX_TSTAMP)) {
2639                         u64 nsec;
2640
2641                         nsec = timecounter_cyc2time(&pdata->tstamp_tc,
2642                                                     packet->rx_tstamp);
2643                         hwtstamps = skb_hwtstamps(skb);
2644                         hwtstamps->hwtstamp = ns_to_ktime(nsec);
2645                 }
2646
2647                 if (XGMAC_GET_BITS(packet->attributes,
2648                                    RX_PACKET_ATTRIBUTES, RSS_HASH))
2649                         skb_set_hash(skb, packet->rss_hash,
2650                                      packet->rss_hash_type);
2651
2652                 skb->dev = netdev;
2653                 skb->protocol = eth_type_trans(skb, netdev);
2654                 skb_record_rx_queue(skb, channel->queue_index);
2655
2656                 napi_gro_receive(napi, skb);
2657
2658 next_packet:
2659                 packet_count++;
2660         }
2661
2662         /* Check if we need to save state before leaving */
2663         if (received && (!last || context_next)) {
2664                 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2665                 rdata->state_saved = 1;
2666                 rdata->state.skb = skb;
2667                 rdata->state.len = len;
2668                 rdata->state.error = error;
2669         }
2670
2671         DBGPR("<--xgbe_rx_poll: packet_count = %d\n", packet_count);
2672
2673         return packet_count;
2674 }
2675
2676 static int xgbe_one_poll(struct napi_struct *napi, int budget)
2677 {
2678         struct xgbe_channel *channel = container_of(napi, struct xgbe_channel,
2679                                                     napi);
2680         struct xgbe_prv_data *pdata = channel->pdata;
2681         int processed = 0;
2682
2683         DBGPR("-->xgbe_one_poll: budget=%d\n", budget);
2684
2685         /* Cleanup Tx ring first */
2686         xgbe_tx_poll(channel);
2687
2688         /* Process Rx ring next */
2689         processed = xgbe_rx_poll(channel, budget);
2690
2691         /* If we processed everything, we are done */
2692         if ((processed < budget) && napi_complete_done(napi, processed)) {
2693                 /* Enable Tx and Rx interrupts */
2694                 if (pdata->channel_irq_mode)
2695                         xgbe_enable_rx_tx_int(pdata, channel);
2696                 else
2697                         enable_irq(channel->dma_irq);
2698         }
2699
2700         DBGPR("<--xgbe_one_poll: received = %d\n", processed);
2701
2702         return processed;
2703 }
2704
2705 static int xgbe_all_poll(struct napi_struct *napi, int budget)
2706 {
2707         struct xgbe_prv_data *pdata = container_of(napi, struct xgbe_prv_data,
2708                                                    napi);
2709         struct xgbe_channel *channel;
2710         int ring_budget;
2711         int processed, last_processed;
2712         unsigned int i;
2713
2714         DBGPR("-->xgbe_all_poll: budget=%d\n", budget);
2715
2716         processed = 0;
2717         ring_budget = budget / pdata->rx_ring_count;
2718         do {
2719                 last_processed = processed;
2720
2721                 for (i = 0; i < pdata->channel_count; i++) {
2722                         channel = pdata->channel[i];
2723
2724                         /* Cleanup Tx ring first */
2725                         xgbe_tx_poll(channel);
2726
2727                         /* Process Rx ring next */
2728                         if (ring_budget > (budget - processed))
2729                                 ring_budget = budget - processed;
2730                         processed += xgbe_rx_poll(channel, ring_budget);
2731                 }
2732         } while ((processed < budget) && (processed != last_processed));
2733
2734         /* If we processed everything, we are done */
2735         if ((processed < budget) && napi_complete_done(napi, processed)) {
2736                 /* Enable Tx and Rx interrupts */
2737                 xgbe_enable_rx_tx_ints(pdata);
2738         }
2739
2740         DBGPR("<--xgbe_all_poll: received = %d\n", processed);
2741
2742         return processed;
2743 }
2744
2745 void xgbe_dump_tx_desc(struct xgbe_prv_data *pdata, struct xgbe_ring *ring,
2746                        unsigned int idx, unsigned int count, unsigned int flag)
2747 {
2748         struct xgbe_ring_data *rdata;
2749         struct xgbe_ring_desc *rdesc;
2750
2751         while (count--) {
2752                 rdata = XGBE_GET_DESC_DATA(ring, idx);
2753                 rdesc = rdata->rdesc;
2754                 netdev_dbg(pdata->netdev,
2755                            "TX_NORMAL_DESC[%d %s] = %08x:%08x:%08x:%08x\n", idx,
2756                            (flag == 1) ? "QUEUED FOR TX" : "TX BY DEVICE",
2757                            le32_to_cpu(rdesc->desc0),
2758                            le32_to_cpu(rdesc->desc1),
2759                            le32_to_cpu(rdesc->desc2),
2760                            le32_to_cpu(rdesc->desc3));
2761                 idx++;
2762         }
2763 }
2764
2765 void xgbe_dump_rx_desc(struct xgbe_prv_data *pdata, struct xgbe_ring *ring,
2766                        unsigned int idx)
2767 {
2768         struct xgbe_ring_data *rdata;
2769         struct xgbe_ring_desc *rdesc;
2770
2771         rdata = XGBE_GET_DESC_DATA(ring, idx);
2772         rdesc = rdata->rdesc;
2773         netdev_dbg(pdata->netdev,
2774                    "RX_NORMAL_DESC[%d RX BY DEVICE] = %08x:%08x:%08x:%08x\n",
2775                    idx, le32_to_cpu(rdesc->desc0), le32_to_cpu(rdesc->desc1),
2776                    le32_to_cpu(rdesc->desc2), le32_to_cpu(rdesc->desc3));
2777 }
2778
2779 void xgbe_print_pkt(struct net_device *netdev, struct sk_buff *skb, bool tx_rx)
2780 {
2781         struct ethhdr *eth = (struct ethhdr *)skb->data;
2782         unsigned char buffer[128];
2783         unsigned int i;
2784
2785         netdev_dbg(netdev, "\n************** SKB dump ****************\n");
2786
2787         netdev_dbg(netdev, "%s packet of %d bytes\n",
2788                    (tx_rx ? "TX" : "RX"), skb->len);
2789
2790         netdev_dbg(netdev, "Dst MAC addr: %pM\n", eth->h_dest);
2791         netdev_dbg(netdev, "Src MAC addr: %pM\n", eth->h_source);
2792         netdev_dbg(netdev, "Protocol: %#06hx\n", ntohs(eth->h_proto));
2793
2794         for (i = 0; i < skb->len; i += 32) {
2795                 unsigned int len = min(skb->len - i, 32U);
2796
2797                 hex_dump_to_buffer(&skb->data[i], len, 32, 1,
2798                                    buffer, sizeof(buffer), false);
2799                 netdev_dbg(netdev, "  %#06x: %s\n", i, buffer);
2800         }
2801
2802         netdev_dbg(netdev, "\n************** SKB dump ****************\n");
2803 }