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         mac_tscr = 0;
1514
1515         switch (config.tx_type) {
1516         case HWTSTAMP_TX_OFF:
1517                 break;
1518
1519         case HWTSTAMP_TX_ON:
1520                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1521                 break;
1522
1523         default:
1524                 return -ERANGE;
1525         }
1526
1527         switch (config.rx_filter) {
1528         case HWTSTAMP_FILTER_NONE:
1529                 break;
1530
1531         case HWTSTAMP_FILTER_NTP_ALL:
1532         case HWTSTAMP_FILTER_ALL:
1533                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 1);
1534                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1535                 break;
1536
1537         /* PTP v2, UDP, any kind of event packet */
1538         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1539                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1540                 fallthrough;    /* to PTP v1, UDP, any kind of event packet */
1541         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1542                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1543                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1544                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1545                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1546                 break;
1547
1548         /* PTP v2, UDP, Sync packet */
1549         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1550                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1551                 fallthrough;    /* to PTP v1, UDP, Sync packet */
1552         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1553                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1554                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1555                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1556                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1557                 break;
1558
1559         /* PTP v2, UDP, Delay_req packet */
1560         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1561                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1562                 fallthrough;    /* to PTP v1, UDP, Delay_req packet */
1563         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1564                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1565                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1566                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1567                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1568                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1569                 break;
1570
1571         /* 802.AS1, Ethernet, any kind of event packet */
1572         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1573                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1574                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1575                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1576                 break;
1577
1578         /* 802.AS1, Ethernet, Sync packet */
1579         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1580                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1581                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1582                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1583                 break;
1584
1585         /* 802.AS1, Ethernet, Delay_req packet */
1586         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1587                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1588                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1589                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1590                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1591                 break;
1592
1593         /* PTP v2/802.AS1, any layer, any kind of event packet */
1594         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1595                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1596                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1597                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1598                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1599                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1600                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1601                 break;
1602
1603         /* PTP v2/802.AS1, any layer, Sync packet */
1604         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1605                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1606                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1607                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1608                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1609                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1610                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1611                 break;
1612
1613         /* PTP v2/802.AS1, any layer, Delay_req packet */
1614         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1615                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1616                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1617                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1618                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1619                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1620                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1621                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1622                 break;
1623
1624         default:
1625                 return -ERANGE;
1626         }
1627
1628         pdata->hw_if.config_tstamp(pdata, mac_tscr);
1629
1630         memcpy(&pdata->tstamp_config, &config, sizeof(config));
1631
1632         return 0;
1633 }
1634
1635 static void xgbe_prep_tx_tstamp(struct xgbe_prv_data *pdata,
1636                                 struct sk_buff *skb,
1637                                 struct xgbe_packet_data *packet)
1638 {
1639         unsigned long flags;
1640
1641         if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP)) {
1642                 spin_lock_irqsave(&pdata->tstamp_lock, flags);
1643                 if (pdata->tx_tstamp_skb) {
1644                         /* Another timestamp in progress, ignore this one */
1645                         XGMAC_SET_BITS(packet->attributes,
1646                                        TX_PACKET_ATTRIBUTES, PTP, 0);
1647                 } else {
1648                         pdata->tx_tstamp_skb = skb_get(skb);
1649                         skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1650                 }
1651                 spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
1652         }
1653
1654         skb_tx_timestamp(skb);
1655 }
1656
1657 static void xgbe_prep_vlan(struct sk_buff *skb, struct xgbe_packet_data *packet)
1658 {
1659         if (skb_vlan_tag_present(skb))
1660                 packet->vlan_ctag = skb_vlan_tag_get(skb);
1661 }
1662
1663 static int xgbe_prep_tso(struct sk_buff *skb, struct xgbe_packet_data *packet)
1664 {
1665         int ret;
1666
1667         if (!XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1668                             TSO_ENABLE))
1669                 return 0;
1670
1671         ret = skb_cow_head(skb, 0);
1672         if (ret)
1673                 return ret;
1674
1675         if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, VXLAN)) {
1676                 packet->header_len = skb_inner_transport_offset(skb) +
1677                                      inner_tcp_hdrlen(skb);
1678                 packet->tcp_header_len = inner_tcp_hdrlen(skb);
1679         } else {
1680                 packet->header_len = skb_transport_offset(skb) +
1681                                      tcp_hdrlen(skb);
1682                 packet->tcp_header_len = tcp_hdrlen(skb);
1683         }
1684         packet->tcp_payload_len = skb->len - packet->header_len;
1685         packet->mss = skb_shinfo(skb)->gso_size;
1686
1687         DBGPR("  packet->header_len=%u\n", packet->header_len);
1688         DBGPR("  packet->tcp_header_len=%u, packet->tcp_payload_len=%u\n",
1689               packet->tcp_header_len, packet->tcp_payload_len);
1690         DBGPR("  packet->mss=%u\n", packet->mss);
1691
1692         /* Update the number of packets that will ultimately be transmitted
1693          * along with the extra bytes for each extra packet
1694          */
1695         packet->tx_packets = skb_shinfo(skb)->gso_segs;
1696         packet->tx_bytes += (packet->tx_packets - 1) * packet->header_len;
1697
1698         return 0;
1699 }
1700
1701 static bool xgbe_is_vxlan(struct sk_buff *skb)
1702 {
1703         if (!skb->encapsulation)
1704                 return false;
1705
1706         if (skb->ip_summed != CHECKSUM_PARTIAL)
1707                 return false;
1708
1709         switch (skb->protocol) {
1710         case htons(ETH_P_IP):
1711                 if (ip_hdr(skb)->protocol != IPPROTO_UDP)
1712                         return false;
1713                 break;
1714
1715         case htons(ETH_P_IPV6):
1716                 if (ipv6_hdr(skb)->nexthdr != IPPROTO_UDP)
1717                         return false;
1718                 break;
1719
1720         default:
1721                 return false;
1722         }
1723
1724         if (skb->inner_protocol_type != ENCAP_TYPE_ETHER ||
1725             skb->inner_protocol != htons(ETH_P_TEB) ||
1726             (skb_inner_mac_header(skb) - skb_transport_header(skb) !=
1727              sizeof(struct udphdr) + sizeof(struct vxlanhdr)))
1728                 return false;
1729
1730         return true;
1731 }
1732
1733 static int xgbe_is_tso(struct sk_buff *skb)
1734 {
1735         if (skb->ip_summed != CHECKSUM_PARTIAL)
1736                 return 0;
1737
1738         if (!skb_is_gso(skb))
1739                 return 0;
1740
1741         DBGPR("  TSO packet to be processed\n");
1742
1743         return 1;
1744 }
1745
1746 static void xgbe_packet_info(struct xgbe_prv_data *pdata,
1747                              struct xgbe_ring *ring, struct sk_buff *skb,
1748                              struct xgbe_packet_data *packet)
1749 {
1750         skb_frag_t *frag;
1751         unsigned int context_desc;
1752         unsigned int len;
1753         unsigned int i;
1754
1755         packet->skb = skb;
1756
1757         context_desc = 0;
1758         packet->rdesc_count = 0;
1759
1760         packet->tx_packets = 1;
1761         packet->tx_bytes = skb->len;
1762
1763         if (xgbe_is_tso(skb)) {
1764                 /* TSO requires an extra descriptor if mss is different */
1765                 if (skb_shinfo(skb)->gso_size != ring->tx.cur_mss) {
1766                         context_desc = 1;
1767                         packet->rdesc_count++;
1768                 }
1769
1770                 /* TSO requires an extra descriptor for TSO header */
1771                 packet->rdesc_count++;
1772
1773                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1774                                TSO_ENABLE, 1);
1775                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1776                                CSUM_ENABLE, 1);
1777         } else if (skb->ip_summed == CHECKSUM_PARTIAL)
1778                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1779                                CSUM_ENABLE, 1);
1780
1781         if (xgbe_is_vxlan(skb))
1782                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1783                                VXLAN, 1);
1784
1785         if (skb_vlan_tag_present(skb)) {
1786                 /* VLAN requires an extra descriptor if tag is different */
1787                 if (skb_vlan_tag_get(skb) != ring->tx.cur_vlan_ctag)
1788                         /* We can share with the TSO context descriptor */
1789                         if (!context_desc) {
1790                                 context_desc = 1;
1791                                 packet->rdesc_count++;
1792                         }
1793
1794                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1795                                VLAN_CTAG, 1);
1796         }
1797
1798         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1799             (pdata->tstamp_config.tx_type == HWTSTAMP_TX_ON))
1800                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1801                                PTP, 1);
1802
1803         for (len = skb_headlen(skb); len;) {
1804                 packet->rdesc_count++;
1805                 len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
1806         }
1807
1808         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1809                 frag = &skb_shinfo(skb)->frags[i];
1810                 for (len = skb_frag_size(frag); len; ) {
1811                         packet->rdesc_count++;
1812                         len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
1813                 }
1814         }
1815 }
1816
1817 static int xgbe_open(struct net_device *netdev)
1818 {
1819         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1820         int ret;
1821
1822         /* Create the various names based on netdev name */
1823         snprintf(pdata->an_name, sizeof(pdata->an_name) - 1, "%s-pcs",
1824                  netdev_name(netdev));
1825
1826         snprintf(pdata->ecc_name, sizeof(pdata->ecc_name) - 1, "%s-ecc",
1827                  netdev_name(netdev));
1828
1829         snprintf(pdata->i2c_name, sizeof(pdata->i2c_name) - 1, "%s-i2c",
1830                  netdev_name(netdev));
1831
1832         /* Create workqueues */
1833         pdata->dev_workqueue =
1834                 create_singlethread_workqueue(netdev_name(netdev));
1835         if (!pdata->dev_workqueue) {
1836                 netdev_err(netdev, "device workqueue creation failed\n");
1837                 return -ENOMEM;
1838         }
1839
1840         pdata->an_workqueue =
1841                 create_singlethread_workqueue(pdata->an_name);
1842         if (!pdata->an_workqueue) {
1843                 netdev_err(netdev, "phy workqueue creation failed\n");
1844                 ret = -ENOMEM;
1845                 goto err_dev_wq;
1846         }
1847
1848         /* Reset the phy settings */
1849         ret = xgbe_phy_reset(pdata);
1850         if (ret)
1851                 goto err_an_wq;
1852
1853         /* Enable the clocks */
1854         ret = clk_prepare_enable(pdata->sysclk);
1855         if (ret) {
1856                 netdev_alert(netdev, "dma clk_prepare_enable failed\n");
1857                 goto err_an_wq;
1858         }
1859
1860         ret = clk_prepare_enable(pdata->ptpclk);
1861         if (ret) {
1862                 netdev_alert(netdev, "ptp clk_prepare_enable failed\n");
1863                 goto err_sysclk;
1864         }
1865
1866         INIT_WORK(&pdata->service_work, xgbe_service);
1867         INIT_WORK(&pdata->restart_work, xgbe_restart);
1868         INIT_WORK(&pdata->stopdev_work, xgbe_stopdev);
1869         INIT_WORK(&pdata->tx_tstamp_work, xgbe_tx_tstamp);
1870
1871         ret = xgbe_alloc_memory(pdata);
1872         if (ret)
1873                 goto err_ptpclk;
1874
1875         ret = xgbe_start(pdata);
1876         if (ret)
1877                 goto err_mem;
1878
1879         clear_bit(XGBE_DOWN, &pdata->dev_state);
1880
1881         return 0;
1882
1883 err_mem:
1884         xgbe_free_memory(pdata);
1885
1886 err_ptpclk:
1887         clk_disable_unprepare(pdata->ptpclk);
1888
1889 err_sysclk:
1890         clk_disable_unprepare(pdata->sysclk);
1891
1892 err_an_wq:
1893         destroy_workqueue(pdata->an_workqueue);
1894
1895 err_dev_wq:
1896         destroy_workqueue(pdata->dev_workqueue);
1897
1898         return ret;
1899 }
1900
1901 static int xgbe_close(struct net_device *netdev)
1902 {
1903         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1904
1905         /* Stop the device */
1906         xgbe_stop(pdata);
1907
1908         xgbe_free_memory(pdata);
1909
1910         /* Disable the clocks */
1911         clk_disable_unprepare(pdata->ptpclk);
1912         clk_disable_unprepare(pdata->sysclk);
1913
1914         destroy_workqueue(pdata->an_workqueue);
1915
1916         destroy_workqueue(pdata->dev_workqueue);
1917
1918         set_bit(XGBE_DOWN, &pdata->dev_state);
1919
1920         return 0;
1921 }
1922
1923 static netdev_tx_t xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
1924 {
1925         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1926         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1927         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1928         struct xgbe_channel *channel;
1929         struct xgbe_ring *ring;
1930         struct xgbe_packet_data *packet;
1931         struct netdev_queue *txq;
1932         netdev_tx_t ret;
1933
1934         DBGPR("-->xgbe_xmit: skb->len = %d\n", skb->len);
1935
1936         channel = pdata->channel[skb->queue_mapping];
1937         txq = netdev_get_tx_queue(netdev, channel->queue_index);
1938         ring = channel->tx_ring;
1939         packet = &ring->packet_data;
1940
1941         ret = NETDEV_TX_OK;
1942
1943         if (skb->len == 0) {
1944                 netif_err(pdata, tx_err, netdev,
1945                           "empty skb received from stack\n");
1946                 dev_kfree_skb_any(skb);
1947                 goto tx_netdev_return;
1948         }
1949
1950         /* Calculate preliminary packet info */
1951         memset(packet, 0, sizeof(*packet));
1952         xgbe_packet_info(pdata, ring, skb, packet);
1953
1954         /* Check that there are enough descriptors available */
1955         ret = xgbe_maybe_stop_tx_queue(channel, ring, packet->rdesc_count);
1956         if (ret)
1957                 goto tx_netdev_return;
1958
1959         ret = xgbe_prep_tso(skb, packet);
1960         if (ret) {
1961                 netif_err(pdata, tx_err, netdev,
1962                           "error processing TSO packet\n");
1963                 dev_kfree_skb_any(skb);
1964                 goto tx_netdev_return;
1965         }
1966         xgbe_prep_vlan(skb, packet);
1967
1968         if (!desc_if->map_tx_skb(channel, skb)) {
1969                 dev_kfree_skb_any(skb);
1970                 goto tx_netdev_return;
1971         }
1972
1973         xgbe_prep_tx_tstamp(pdata, skb, packet);
1974
1975         /* Report on the actual number of bytes (to be) sent */
1976         netdev_tx_sent_queue(txq, packet->tx_bytes);
1977
1978         /* Configure required descriptor fields for transmission */
1979         hw_if->dev_xmit(channel);
1980
1981         if (netif_msg_pktdata(pdata))
1982                 xgbe_print_pkt(netdev, skb, true);
1983
1984         /* Stop the queue in advance if there may not be enough descriptors */
1985         xgbe_maybe_stop_tx_queue(channel, ring, XGBE_TX_MAX_DESCS);
1986
1987         ret = NETDEV_TX_OK;
1988
1989 tx_netdev_return:
1990         return ret;
1991 }
1992
1993 static void xgbe_set_rx_mode(struct net_device *netdev)
1994 {
1995         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1996         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1997
1998         DBGPR("-->xgbe_set_rx_mode\n");
1999
2000         hw_if->config_rx_mode(pdata);
2001
2002         DBGPR("<--xgbe_set_rx_mode\n");
2003 }
2004
2005 static int xgbe_set_mac_address(struct net_device *netdev, void *addr)
2006 {
2007         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2008         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2009         struct sockaddr *saddr = addr;
2010
2011         DBGPR("-->xgbe_set_mac_address\n");
2012
2013         if (!is_valid_ether_addr(saddr->sa_data))
2014                 return -EADDRNOTAVAIL;
2015
2016         eth_hw_addr_set(netdev, saddr->sa_data);
2017
2018         hw_if->set_mac_address(pdata, netdev->dev_addr);
2019
2020         DBGPR("<--xgbe_set_mac_address\n");
2021
2022         return 0;
2023 }
2024
2025 static int xgbe_ioctl(struct net_device *netdev, struct ifreq *ifreq, int cmd)
2026 {
2027         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2028         int ret;
2029
2030         switch (cmd) {
2031         case SIOCGHWTSTAMP:
2032                 ret = xgbe_get_hwtstamp_settings(pdata, ifreq);
2033                 break;
2034
2035         case SIOCSHWTSTAMP:
2036                 ret = xgbe_set_hwtstamp_settings(pdata, ifreq);
2037                 break;
2038
2039         default:
2040                 ret = -EOPNOTSUPP;
2041         }
2042
2043         return ret;
2044 }
2045
2046 static int xgbe_change_mtu(struct net_device *netdev, int mtu)
2047 {
2048         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2049         int ret;
2050
2051         DBGPR("-->xgbe_change_mtu\n");
2052
2053         ret = xgbe_calc_rx_buf_size(netdev, mtu);
2054         if (ret < 0)
2055                 return ret;
2056
2057         pdata->rx_buf_size = ret;
2058         netdev->mtu = mtu;
2059
2060         xgbe_restart_dev(pdata);
2061
2062         DBGPR("<--xgbe_change_mtu\n");
2063
2064         return 0;
2065 }
2066
2067 static void xgbe_tx_timeout(struct net_device *netdev, unsigned int txqueue)
2068 {
2069         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2070
2071         netdev_warn(netdev, "tx timeout, device restarting\n");
2072         schedule_work(&pdata->restart_work);
2073 }
2074
2075 static void xgbe_get_stats64(struct net_device *netdev,
2076                              struct rtnl_link_stats64 *s)
2077 {
2078         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2079         struct xgbe_mmc_stats *pstats = &pdata->mmc_stats;
2080
2081         DBGPR("-->%s\n", __func__);
2082
2083         pdata->hw_if.read_mmc_stats(pdata);
2084
2085         s->rx_packets = pstats->rxframecount_gb;
2086         s->rx_bytes = pstats->rxoctetcount_gb;
2087         s->rx_errors = pstats->rxframecount_gb -
2088                        pstats->rxbroadcastframes_g -
2089                        pstats->rxmulticastframes_g -
2090                        pstats->rxunicastframes_g;
2091         s->multicast = pstats->rxmulticastframes_g;
2092         s->rx_length_errors = pstats->rxlengtherror;
2093         s->rx_crc_errors = pstats->rxcrcerror;
2094         s->rx_fifo_errors = pstats->rxfifooverflow;
2095
2096         s->tx_packets = pstats->txframecount_gb;
2097         s->tx_bytes = pstats->txoctetcount_gb;
2098         s->tx_errors = pstats->txframecount_gb - pstats->txframecount_g;
2099         s->tx_dropped = netdev->stats.tx_dropped;
2100
2101         DBGPR("<--%s\n", __func__);
2102 }
2103
2104 static int xgbe_vlan_rx_add_vid(struct net_device *netdev, __be16 proto,
2105                                 u16 vid)
2106 {
2107         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2108         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2109
2110         DBGPR("-->%s\n", __func__);
2111
2112         set_bit(vid, pdata->active_vlans);
2113         hw_if->update_vlan_hash_table(pdata);
2114
2115         DBGPR("<--%s\n", __func__);
2116
2117         return 0;
2118 }
2119
2120 static int xgbe_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto,
2121                                  u16 vid)
2122 {
2123         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2124         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2125
2126         DBGPR("-->%s\n", __func__);
2127
2128         clear_bit(vid, pdata->active_vlans);
2129         hw_if->update_vlan_hash_table(pdata);
2130
2131         DBGPR("<--%s\n", __func__);
2132
2133         return 0;
2134 }
2135
2136 #ifdef CONFIG_NET_POLL_CONTROLLER
2137 static void xgbe_poll_controller(struct net_device *netdev)
2138 {
2139         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2140         struct xgbe_channel *channel;
2141         unsigned int i;
2142
2143         DBGPR("-->xgbe_poll_controller\n");
2144
2145         if (pdata->per_channel_irq) {
2146                 for (i = 0; i < pdata->channel_count; i++) {
2147                         channel = pdata->channel[i];
2148                         xgbe_dma_isr(channel->dma_irq, channel);
2149                 }
2150         } else {
2151                 disable_irq(pdata->dev_irq);
2152                 xgbe_isr(pdata->dev_irq, pdata);
2153                 enable_irq(pdata->dev_irq);
2154         }
2155
2156         DBGPR("<--xgbe_poll_controller\n");
2157 }
2158 #endif /* End CONFIG_NET_POLL_CONTROLLER */
2159
2160 static int xgbe_setup_tc(struct net_device *netdev, enum tc_setup_type type,
2161                          void *type_data)
2162 {
2163         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2164         struct tc_mqprio_qopt *mqprio = type_data;
2165         u8 tc;
2166
2167         if (type != TC_SETUP_QDISC_MQPRIO)
2168                 return -EOPNOTSUPP;
2169
2170         mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
2171         tc = mqprio->num_tc;
2172
2173         if (tc > pdata->hw_feat.tc_cnt)
2174                 return -EINVAL;
2175
2176         pdata->num_tcs = tc;
2177         pdata->hw_if.config_tc(pdata);
2178
2179         return 0;
2180 }
2181
2182 static netdev_features_t xgbe_fix_features(struct net_device *netdev,
2183                                            netdev_features_t features)
2184 {
2185         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2186         netdev_features_t vxlan_base;
2187
2188         vxlan_base = NETIF_F_GSO_UDP_TUNNEL | NETIF_F_RX_UDP_TUNNEL_PORT;
2189
2190         if (!pdata->hw_feat.vxn)
2191                 return features;
2192
2193         /* VXLAN CSUM requires VXLAN base */
2194         if ((features & NETIF_F_GSO_UDP_TUNNEL_CSUM) &&
2195             !(features & NETIF_F_GSO_UDP_TUNNEL)) {
2196                 netdev_notice(netdev,
2197                               "forcing tx udp tunnel support\n");
2198                 features |= NETIF_F_GSO_UDP_TUNNEL;
2199         }
2200
2201         /* Can't do one without doing the other */
2202         if ((features & vxlan_base) != vxlan_base) {
2203                 netdev_notice(netdev,
2204                               "forcing both tx and rx udp tunnel support\n");
2205                 features |= vxlan_base;
2206         }
2207
2208         if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) {
2209                 if (!(features & NETIF_F_GSO_UDP_TUNNEL_CSUM)) {
2210                         netdev_notice(netdev,
2211                                       "forcing tx udp tunnel checksumming on\n");
2212                         features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
2213                 }
2214         } else {
2215                 if (features & NETIF_F_GSO_UDP_TUNNEL_CSUM) {
2216                         netdev_notice(netdev,
2217                                       "forcing tx udp tunnel checksumming off\n");
2218                         features &= ~NETIF_F_GSO_UDP_TUNNEL_CSUM;
2219                 }
2220         }
2221
2222         return features;
2223 }
2224
2225 static int xgbe_set_features(struct net_device *netdev,
2226                              netdev_features_t features)
2227 {
2228         struct xgbe_prv_data *pdata = netdev_priv(netdev);
2229         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2230         netdev_features_t rxhash, rxcsum, rxvlan, rxvlan_filter;
2231         int ret = 0;
2232
2233         rxhash = pdata->netdev_features & NETIF_F_RXHASH;
2234         rxcsum = pdata->netdev_features & NETIF_F_RXCSUM;
2235         rxvlan = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_RX;
2236         rxvlan_filter = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_FILTER;
2237
2238         if ((features & NETIF_F_RXHASH) && !rxhash)
2239                 ret = hw_if->enable_rss(pdata);
2240         else if (!(features & NETIF_F_RXHASH) && rxhash)
2241                 ret = hw_if->disable_rss(pdata);
2242         if (ret)
2243                 return ret;
2244
2245         if ((features & NETIF_F_RXCSUM) && !rxcsum)
2246                 hw_if->enable_rx_csum(pdata);
2247         else if (!(features & NETIF_F_RXCSUM) && rxcsum)
2248                 hw_if->disable_rx_csum(pdata);
2249
2250         if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan)
2251                 hw_if->enable_rx_vlan_stripping(pdata);
2252         else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) && rxvlan)
2253                 hw_if->disable_rx_vlan_stripping(pdata);
2254
2255         if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) && !rxvlan_filter)
2256                 hw_if->enable_rx_vlan_filtering(pdata);
2257         else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) && rxvlan_filter)
2258                 hw_if->disable_rx_vlan_filtering(pdata);
2259
2260         pdata->netdev_features = features;
2261
2262         DBGPR("<--xgbe_set_features\n");
2263
2264         return 0;
2265 }
2266
2267 static netdev_features_t xgbe_features_check(struct sk_buff *skb,
2268                                              struct net_device *netdev,
2269                                              netdev_features_t features)
2270 {
2271         features = vlan_features_check(skb, features);
2272         features = vxlan_features_check(skb, features);
2273
2274         return features;
2275 }
2276
2277 static const struct net_device_ops xgbe_netdev_ops = {
2278         .ndo_open               = xgbe_open,
2279         .ndo_stop               = xgbe_close,
2280         .ndo_start_xmit         = xgbe_xmit,
2281         .ndo_set_rx_mode        = xgbe_set_rx_mode,
2282         .ndo_set_mac_address    = xgbe_set_mac_address,
2283         .ndo_validate_addr      = eth_validate_addr,
2284         .ndo_eth_ioctl          = xgbe_ioctl,
2285         .ndo_change_mtu         = xgbe_change_mtu,
2286         .ndo_tx_timeout         = xgbe_tx_timeout,
2287         .ndo_get_stats64        = xgbe_get_stats64,
2288         .ndo_vlan_rx_add_vid    = xgbe_vlan_rx_add_vid,
2289         .ndo_vlan_rx_kill_vid   = xgbe_vlan_rx_kill_vid,
2290 #ifdef CONFIG_NET_POLL_CONTROLLER
2291         .ndo_poll_controller    = xgbe_poll_controller,
2292 #endif
2293         .ndo_setup_tc           = xgbe_setup_tc,
2294         .ndo_fix_features       = xgbe_fix_features,
2295         .ndo_set_features       = xgbe_set_features,
2296         .ndo_features_check     = xgbe_features_check,
2297 };
2298
2299 const struct net_device_ops *xgbe_get_netdev_ops(void)
2300 {
2301         return &xgbe_netdev_ops;
2302 }
2303
2304 static void xgbe_rx_refresh(struct xgbe_channel *channel)
2305 {
2306         struct xgbe_prv_data *pdata = channel->pdata;
2307         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2308         struct xgbe_desc_if *desc_if = &pdata->desc_if;
2309         struct xgbe_ring *ring = channel->rx_ring;
2310         struct xgbe_ring_data *rdata;
2311
2312         while (ring->dirty != ring->cur) {
2313                 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
2314
2315                 /* Reset rdata values */
2316                 desc_if->unmap_rdata(pdata, rdata);
2317
2318                 if (desc_if->map_rx_buffer(pdata, ring, rdata))
2319                         break;
2320
2321                 hw_if->rx_desc_reset(pdata, rdata, ring->dirty);
2322
2323                 ring->dirty++;
2324         }
2325
2326         /* Make sure everything is written before the register write */
2327         wmb();
2328
2329         /* Update the Rx Tail Pointer Register with address of
2330          * the last cleaned entry */
2331         rdata = XGBE_GET_DESC_DATA(ring, ring->dirty - 1);
2332         XGMAC_DMA_IOWRITE(channel, DMA_CH_RDTR_LO,
2333                           lower_32_bits(rdata->rdesc_dma));
2334 }
2335
2336 static struct sk_buff *xgbe_create_skb(struct xgbe_prv_data *pdata,
2337                                        struct napi_struct *napi,
2338                                        struct xgbe_ring_data *rdata,
2339                                        unsigned int len)
2340 {
2341         struct sk_buff *skb;
2342         u8 *packet;
2343
2344         skb = napi_alloc_skb(napi, rdata->rx.hdr.dma_len);
2345         if (!skb)
2346                 return NULL;
2347
2348         /* Pull in the header buffer which may contain just the header
2349          * or the header plus data
2350          */
2351         dma_sync_single_range_for_cpu(pdata->dev, rdata->rx.hdr.dma_base,
2352                                       rdata->rx.hdr.dma_off,
2353                                       rdata->rx.hdr.dma_len, DMA_FROM_DEVICE);
2354
2355         packet = page_address(rdata->rx.hdr.pa.pages) +
2356                  rdata->rx.hdr.pa.pages_offset;
2357         skb_copy_to_linear_data(skb, packet, len);
2358         skb_put(skb, len);
2359
2360         return skb;
2361 }
2362
2363 static unsigned int xgbe_rx_buf1_len(struct xgbe_ring_data *rdata,
2364                                      struct xgbe_packet_data *packet)
2365 {
2366         /* Always zero if not the first descriptor */
2367         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, FIRST))
2368                 return 0;
2369
2370         /* First descriptor with split header, return header length */
2371         if (rdata->rx.hdr_len)
2372                 return rdata->rx.hdr_len;
2373
2374         /* First descriptor but not the last descriptor and no split header,
2375          * so the full buffer was used
2376          */
2377         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, LAST))
2378                 return rdata->rx.hdr.dma_len;
2379
2380         /* First descriptor and last descriptor and no split header, so
2381          * calculate how much of the buffer was used
2382          */
2383         return min_t(unsigned int, rdata->rx.hdr.dma_len, rdata->rx.len);
2384 }
2385
2386 static unsigned int xgbe_rx_buf2_len(struct xgbe_ring_data *rdata,
2387                                      struct xgbe_packet_data *packet,
2388                                      unsigned int len)
2389 {
2390         /* Always the full buffer if not the last descriptor */
2391         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, LAST))
2392                 return rdata->rx.buf.dma_len;
2393
2394         /* Last descriptor so calculate how much of the buffer was used
2395          * for the last bit of data
2396          */
2397         return rdata->rx.len - len;
2398 }
2399
2400 static int xgbe_tx_poll(struct xgbe_channel *channel)
2401 {
2402         struct xgbe_prv_data *pdata = channel->pdata;
2403         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2404         struct xgbe_desc_if *desc_if = &pdata->desc_if;
2405         struct xgbe_ring *ring = channel->tx_ring;
2406         struct xgbe_ring_data *rdata;
2407         struct xgbe_ring_desc *rdesc;
2408         struct net_device *netdev = pdata->netdev;
2409         struct netdev_queue *txq;
2410         int processed = 0;
2411         unsigned int tx_packets = 0, tx_bytes = 0;
2412         unsigned int cur;
2413
2414         DBGPR("-->xgbe_tx_poll\n");
2415
2416         /* Nothing to do if there isn't a Tx ring for this channel */
2417         if (!ring)
2418                 return 0;
2419
2420         cur = ring->cur;
2421
2422         /* Be sure we get ring->cur before accessing descriptor data */
2423         smp_rmb();
2424
2425         txq = netdev_get_tx_queue(netdev, channel->queue_index);
2426
2427         while ((processed < XGBE_TX_DESC_MAX_PROC) &&
2428                (ring->dirty != cur)) {
2429                 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
2430                 rdesc = rdata->rdesc;
2431
2432                 if (!hw_if->tx_complete(rdesc))
2433                         break;
2434
2435                 /* Make sure descriptor fields are read after reading the OWN
2436                  * bit */
2437                 dma_rmb();
2438
2439                 if (netif_msg_tx_done(pdata))
2440                         xgbe_dump_tx_desc(pdata, ring, ring->dirty, 1, 0);
2441
2442                 if (hw_if->is_last_desc(rdesc)) {
2443                         tx_packets += rdata->tx.packets;
2444                         tx_bytes += rdata->tx.bytes;
2445                 }
2446
2447                 /* Free the SKB and reset the descriptor for re-use */
2448                 desc_if->unmap_rdata(pdata, rdata);
2449                 hw_if->tx_desc_reset(rdata);
2450
2451                 processed++;
2452                 ring->dirty++;
2453         }
2454
2455         if (!processed)
2456                 return 0;
2457
2458         netdev_tx_completed_queue(txq, tx_packets, tx_bytes);
2459
2460         if ((ring->tx.queue_stopped == 1) &&
2461             (xgbe_tx_avail_desc(ring) > XGBE_TX_DESC_MIN_FREE)) {
2462                 ring->tx.queue_stopped = 0;
2463                 netif_tx_wake_queue(txq);
2464         }
2465
2466         DBGPR("<--xgbe_tx_poll: processed=%d\n", processed);
2467
2468         return processed;
2469 }
2470
2471 static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
2472 {
2473         struct xgbe_prv_data *pdata = channel->pdata;
2474         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2475         struct xgbe_ring *ring = channel->rx_ring;
2476         struct xgbe_ring_data *rdata;
2477         struct xgbe_packet_data *packet;
2478         struct net_device *netdev = pdata->netdev;
2479         struct napi_struct *napi;
2480         struct sk_buff *skb;
2481         struct skb_shared_hwtstamps *hwtstamps;
2482         unsigned int last, error, context_next, context;
2483         unsigned int len, buf1_len, buf2_len, max_len;
2484         unsigned int received = 0;
2485         int packet_count = 0;
2486
2487         DBGPR("-->xgbe_rx_poll: budget=%d\n", budget);
2488
2489         /* Nothing to do if there isn't a Rx ring for this channel */
2490         if (!ring)
2491                 return 0;
2492
2493         last = 0;
2494         context_next = 0;
2495
2496         napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
2497
2498         rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2499         packet = &ring->packet_data;
2500         while (packet_count < budget) {
2501                 DBGPR("  cur = %d\n", ring->cur);
2502
2503                 /* First time in loop see if we need to restore state */
2504                 if (!received && rdata->state_saved) {
2505                         skb = rdata->state.skb;
2506                         error = rdata->state.error;
2507                         len = rdata->state.len;
2508                 } else {
2509                         memset(packet, 0, sizeof(*packet));
2510                         skb = NULL;
2511                         error = 0;
2512                         len = 0;
2513                 }
2514
2515 read_again:
2516                 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2517
2518                 if (xgbe_rx_dirty_desc(ring) > (XGBE_RX_DESC_CNT >> 3))
2519                         xgbe_rx_refresh(channel);
2520
2521                 if (hw_if->dev_read(channel))
2522                         break;
2523
2524                 received++;
2525                 ring->cur++;
2526
2527                 last = XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES,
2528                                       LAST);
2529                 context_next = XGMAC_GET_BITS(packet->attributes,
2530                                               RX_PACKET_ATTRIBUTES,
2531                                               CONTEXT_NEXT);
2532                 context = XGMAC_GET_BITS(packet->attributes,
2533                                          RX_PACKET_ATTRIBUTES,
2534                                          CONTEXT);
2535
2536                 /* Earlier error, just drain the remaining data */
2537                 if ((!last || context_next) && error)
2538                         goto read_again;
2539
2540                 if (error || packet->errors) {
2541                         if (packet->errors)
2542                                 netif_err(pdata, rx_err, netdev,
2543                                           "error in received packet\n");
2544                         dev_kfree_skb(skb);
2545                         goto next_packet;
2546                 }
2547
2548                 if (!context) {
2549                         /* Get the data length in the descriptor buffers */
2550                         buf1_len = xgbe_rx_buf1_len(rdata, packet);
2551                         len += buf1_len;
2552                         buf2_len = xgbe_rx_buf2_len(rdata, packet, len);
2553                         len += buf2_len;
2554
2555                         if (buf2_len > rdata->rx.buf.dma_len) {
2556                                 /* Hardware inconsistency within the descriptors
2557                                  * that has resulted in a length underflow.
2558                                  */
2559                                 error = 1;
2560                                 goto skip_data;
2561                         }
2562
2563                         if (!skb) {
2564                                 skb = xgbe_create_skb(pdata, napi, rdata,
2565                                                       buf1_len);
2566                                 if (!skb) {
2567                                         error = 1;
2568                                         goto skip_data;
2569                                 }
2570                         }
2571
2572                         if (buf2_len) {
2573                                 dma_sync_single_range_for_cpu(pdata->dev,
2574                                                         rdata->rx.buf.dma_base,
2575                                                         rdata->rx.buf.dma_off,
2576                                                         rdata->rx.buf.dma_len,
2577                                                         DMA_FROM_DEVICE);
2578
2579                                 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
2580                                                 rdata->rx.buf.pa.pages,
2581                                                 rdata->rx.buf.pa.pages_offset,
2582                                                 buf2_len,
2583                                                 rdata->rx.buf.dma_len);
2584                                 rdata->rx.buf.pa.pages = NULL;
2585                         }
2586                 }
2587
2588 skip_data:
2589                 if (!last || context_next)
2590                         goto read_again;
2591
2592                 if (!skb || error) {
2593                         dev_kfree_skb(skb);
2594                         goto next_packet;
2595                 }
2596
2597                 /* Be sure we don't exceed the configured MTU */
2598                 max_len = netdev->mtu + ETH_HLEN;
2599                 if (!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
2600                     (skb->protocol == htons(ETH_P_8021Q)))
2601                         max_len += VLAN_HLEN;
2602
2603                 if (skb->len > max_len) {
2604                         netif_err(pdata, rx_err, netdev,
2605                                   "packet length exceeds configured MTU\n");
2606                         dev_kfree_skb(skb);
2607                         goto next_packet;
2608                 }
2609
2610                 if (netif_msg_pktdata(pdata))
2611                         xgbe_print_pkt(netdev, skb, false);
2612
2613                 skb_checksum_none_assert(skb);
2614                 if (XGMAC_GET_BITS(packet->attributes,
2615                                    RX_PACKET_ATTRIBUTES, CSUM_DONE))
2616                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2617
2618                 if (XGMAC_GET_BITS(packet->attributes,
2619                                    RX_PACKET_ATTRIBUTES, TNP)) {
2620                         skb->encapsulation = 1;
2621
2622                         if (XGMAC_GET_BITS(packet->attributes,
2623                                            RX_PACKET_ATTRIBUTES, TNPCSUM_DONE))
2624                                 skb->csum_level = 1;
2625                 }
2626
2627                 if (XGMAC_GET_BITS(packet->attributes,
2628                                    RX_PACKET_ATTRIBUTES, VLAN_CTAG))
2629                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2630                                                packet->vlan_ctag);
2631
2632                 if (XGMAC_GET_BITS(packet->attributes,
2633                                    RX_PACKET_ATTRIBUTES, RX_TSTAMP)) {
2634                         u64 nsec;
2635
2636                         nsec = timecounter_cyc2time(&pdata->tstamp_tc,
2637                                                     packet->rx_tstamp);
2638                         hwtstamps = skb_hwtstamps(skb);
2639                         hwtstamps->hwtstamp = ns_to_ktime(nsec);
2640                 }
2641
2642                 if (XGMAC_GET_BITS(packet->attributes,
2643                                    RX_PACKET_ATTRIBUTES, RSS_HASH))
2644                         skb_set_hash(skb, packet->rss_hash,
2645                                      packet->rss_hash_type);
2646
2647                 skb->dev = netdev;
2648                 skb->protocol = eth_type_trans(skb, netdev);
2649                 skb_record_rx_queue(skb, channel->queue_index);
2650
2651                 napi_gro_receive(napi, skb);
2652
2653 next_packet:
2654                 packet_count++;
2655         }
2656
2657         /* Check if we need to save state before leaving */
2658         if (received && (!last || context_next)) {
2659                 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2660                 rdata->state_saved = 1;
2661                 rdata->state.skb = skb;
2662                 rdata->state.len = len;
2663                 rdata->state.error = error;
2664         }
2665
2666         DBGPR("<--xgbe_rx_poll: packet_count = %d\n", packet_count);
2667
2668         return packet_count;
2669 }
2670
2671 static int xgbe_one_poll(struct napi_struct *napi, int budget)
2672 {
2673         struct xgbe_channel *channel = container_of(napi, struct xgbe_channel,
2674                                                     napi);
2675         struct xgbe_prv_data *pdata = channel->pdata;
2676         int processed = 0;
2677
2678         DBGPR("-->xgbe_one_poll: budget=%d\n", budget);
2679
2680         /* Cleanup Tx ring first */
2681         xgbe_tx_poll(channel);
2682
2683         /* Process Rx ring next */
2684         processed = xgbe_rx_poll(channel, budget);
2685
2686         /* If we processed everything, we are done */
2687         if ((processed < budget) && napi_complete_done(napi, processed)) {
2688                 /* Enable Tx and Rx interrupts */
2689                 if (pdata->channel_irq_mode)
2690                         xgbe_enable_rx_tx_int(pdata, channel);
2691                 else
2692                         enable_irq(channel->dma_irq);
2693         }
2694
2695         DBGPR("<--xgbe_one_poll: received = %d\n", processed);
2696
2697         return processed;
2698 }
2699
2700 static int xgbe_all_poll(struct napi_struct *napi, int budget)
2701 {
2702         struct xgbe_prv_data *pdata = container_of(napi, struct xgbe_prv_data,
2703                                                    napi);
2704         struct xgbe_channel *channel;
2705         int ring_budget;
2706         int processed, last_processed;
2707         unsigned int i;
2708
2709         DBGPR("-->xgbe_all_poll: budget=%d\n", budget);
2710
2711         processed = 0;
2712         ring_budget = budget / pdata->rx_ring_count;
2713         do {
2714                 last_processed = processed;
2715
2716                 for (i = 0; i < pdata->channel_count; i++) {
2717                         channel = pdata->channel[i];
2718
2719                         /* Cleanup Tx ring first */
2720                         xgbe_tx_poll(channel);
2721
2722                         /* Process Rx ring next */
2723                         if (ring_budget > (budget - processed))
2724                                 ring_budget = budget - processed;
2725                         processed += xgbe_rx_poll(channel, ring_budget);
2726                 }
2727         } while ((processed < budget) && (processed != last_processed));
2728
2729         /* If we processed everything, we are done */
2730         if ((processed < budget) && napi_complete_done(napi, processed)) {
2731                 /* Enable Tx and Rx interrupts */
2732                 xgbe_enable_rx_tx_ints(pdata);
2733         }
2734
2735         DBGPR("<--xgbe_all_poll: received = %d\n", processed);
2736
2737         return processed;
2738 }
2739
2740 void xgbe_dump_tx_desc(struct xgbe_prv_data *pdata, struct xgbe_ring *ring,
2741                        unsigned int idx, unsigned int count, unsigned int flag)
2742 {
2743         struct xgbe_ring_data *rdata;
2744         struct xgbe_ring_desc *rdesc;
2745
2746         while (count--) {
2747                 rdata = XGBE_GET_DESC_DATA(ring, idx);
2748                 rdesc = rdata->rdesc;
2749                 netdev_dbg(pdata->netdev,
2750                            "TX_NORMAL_DESC[%d %s] = %08x:%08x:%08x:%08x\n", idx,
2751                            (flag == 1) ? "QUEUED FOR TX" : "TX BY DEVICE",
2752                            le32_to_cpu(rdesc->desc0),
2753                            le32_to_cpu(rdesc->desc1),
2754                            le32_to_cpu(rdesc->desc2),
2755                            le32_to_cpu(rdesc->desc3));
2756                 idx++;
2757         }
2758 }
2759
2760 void xgbe_dump_rx_desc(struct xgbe_prv_data *pdata, struct xgbe_ring *ring,
2761                        unsigned int idx)
2762 {
2763         struct xgbe_ring_data *rdata;
2764         struct xgbe_ring_desc *rdesc;
2765
2766         rdata = XGBE_GET_DESC_DATA(ring, idx);
2767         rdesc = rdata->rdesc;
2768         netdev_dbg(pdata->netdev,
2769                    "RX_NORMAL_DESC[%d RX BY DEVICE] = %08x:%08x:%08x:%08x\n",
2770                    idx, le32_to_cpu(rdesc->desc0), le32_to_cpu(rdesc->desc1),
2771                    le32_to_cpu(rdesc->desc2), le32_to_cpu(rdesc->desc3));
2772 }
2773
2774 void xgbe_print_pkt(struct net_device *netdev, struct sk_buff *skb, bool tx_rx)
2775 {
2776         struct ethhdr *eth = (struct ethhdr *)skb->data;
2777         unsigned char buffer[128];
2778         unsigned int i;
2779
2780         netdev_dbg(netdev, "\n************** SKB dump ****************\n");
2781
2782         netdev_dbg(netdev, "%s packet of %d bytes\n",
2783                    (tx_rx ? "TX" : "RX"), skb->len);
2784
2785         netdev_dbg(netdev, "Dst MAC addr: %pM\n", eth->h_dest);
2786         netdev_dbg(netdev, "Src MAC addr: %pM\n", eth->h_source);
2787         netdev_dbg(netdev, "Protocol: %#06x\n", ntohs(eth->h_proto));
2788
2789         for (i = 0; i < skb->len; i += 32) {
2790                 unsigned int len = min(skb->len - i, 32U);
2791
2792                 hex_dump_to_buffer(&skb->data[i], len, 32, 1,
2793                                    buffer, sizeof(buffer), false);
2794                 netdev_dbg(netdev, "  %#06x: %s\n", i, buffer);
2795         }
2796
2797         netdev_dbg(netdev, "\n************** SKB dump ****************\n");
2798 }