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 <net/busy_poll.h>
 122 #include <linux/clk.h>
 123 #include <linux/if_ether.h>
 124 #include <linux/net_tstamp.h>
 125 #include <linux/phy.h>
 126
 127 #include "xgbe.h"
 128 #include "xgbe-common.h"
 129
 130 static unsigned int ecc_sec_info_threshold = 10;
 131 static unsigned int ecc_sec_warn_threshold = 10000;
 132 static unsigned int ecc_sec_period = 600;
 133 static unsigned int ecc_ded_threshold = 2;
 134 static unsigned int ecc_ded_period = 600;
 135
 136 #ifdef CONFIG_AMD_XGBE_HAVE_ECC
 137 /* Only expose the ECC parameters if supported */
 138 module_param(ecc_sec_info_threshold, uint, S_IWUSR | S_IRUGO);
 139 MODULE_PARM_DESC(ecc_sec_info_threshold,
 140                  " ECC corrected error informational threshold setting");
 141
 142 module_param(ecc_sec_warn_threshold, uint, S_IWUSR | S_IRUGO);
 143 MODULE_PARM_DESC(ecc_sec_warn_threshold,
 144                  " ECC corrected error warning threshold setting");
 145
 146 module_param(ecc_sec_period, uint, S_IWUSR | S_IRUGO);
 147 MODULE_PARM_DESC(ecc_sec_period, " ECC corrected error period (in seconds)");
 148
 149 module_param(ecc_ded_threshold, uint, S_IWUSR | S_IRUGO);
 150 MODULE_PARM_DESC(ecc_ded_threshold, " ECC detected error threshold setting");
 151
 152 module_param(ecc_ded_period, uint, S_IWUSR | S_IRUGO);
 153 MODULE_PARM_DESC(ecc_ded_period, " ECC detected error period (in seconds)");
 154 #endif
 155
 156 static int xgbe_one_poll(struct napi_struct *, int);
 157 static int xgbe_all_poll(struct napi_struct *, int);
 158 static void xgbe_stop(struct xgbe_prv_data *);
 159
 160 static int xgbe_alloc_channels(struct xgbe_prv_data *pdata)
 161 {
 162         struct xgbe_channel *channel_mem, *channel;
 163         struct xgbe_ring *tx_ring, *rx_ring;
 164         unsigned int count, i;
 165         int ret = -ENOMEM;
 166
 167         count = max_t(unsigned int, pdata->tx_ring_count, pdata->rx_ring_count);
 168
 169         channel_mem = kcalloc(count, sizeof(struct xgbe_channel), GFP_KERNEL);
 170         if (!channel_mem)
 171                 goto err_channel;
 172
 173         tx_ring = kcalloc(pdata->tx_ring_count, sizeof(struct xgbe_ring),
 174                           GFP_KERNEL);
 175         if (!tx_ring)
 176                 goto err_tx_ring;
 177
 178         rx_ring = kcalloc(pdata->rx_ring_count, sizeof(struct xgbe_ring),
 179                           GFP_KERNEL);
 180         if (!rx_ring)
 181                 goto err_rx_ring;
 182
 183         for (i = 0, channel = channel_mem; i < count; i++, channel++) {
 184                 snprintf(channel->name, sizeof(channel->name), "channel-%u", i);
 185                 channel->pdata = pdata;
 186                 channel->queue_index = i;
 187                 channel->dma_regs = pdata->xgmac_regs + DMA_CH_BASE +
 188                                     (DMA_CH_INC * i);
 189
 190                 if (pdata->per_channel_irq)
 191                         channel->dma_irq = pdata->channel_irq[i];
 192
 193                 if (i < pdata->tx_ring_count) {
 194                         spin_lock_init(&tx_ring->lock);
 195                         channel->tx_ring = tx_ring++;
 196                 }
 197
 198                 if (i < pdata->rx_ring_count) {
 199                         spin_lock_init(&rx_ring->lock);
 200                         channel->rx_ring = rx_ring++;
 201                 }
 202
 203                 netif_dbg(pdata, drv, pdata->netdev,
 204                           "%s: dma_regs=%p, dma_irq=%d, tx=%p, rx=%p\n",
 205                           channel->name, channel->dma_regs, channel->dma_irq,
 206                           channel->tx_ring, channel->rx_ring);
 207         }
 208
 209         pdata->channel = channel_mem;
 210         pdata->channel_count = count;
 211
 212         return 0;
 213
 214 err_rx_ring:
 215         kfree(tx_ring);
 216
 217 err_tx_ring:
 218         kfree(channel_mem);
 219
 220 err_channel:
 221         return ret;
 222 }
 223
 224 static void xgbe_free_channels(struct xgbe_prv_data *pdata)
 225 {
 226         if (!pdata->channel)
 227                 return;
 228
 229         kfree(pdata->channel->rx_ring);
 230         kfree(pdata->channel->tx_ring);
 231         kfree(pdata->channel);
 232
 233         pdata->channel = NULL;
 234         pdata->channel_count = 0;
 235 }
 236
 237 static inline unsigned int xgbe_tx_avail_desc(struct xgbe_ring *ring)
 238 {
 239         return (ring->rdesc_count - (ring->cur - ring->dirty));
 240 }
 241
 242 static inline unsigned int xgbe_rx_dirty_desc(struct xgbe_ring *ring)
 243 {
 244         return (ring->cur - ring->dirty);
 245 }
 246
 247 static int xgbe_maybe_stop_tx_queue(struct xgbe_channel *channel,
 248                                     struct xgbe_ring *ring, unsigned int count)
 249 {
 250         struct xgbe_prv_data *pdata = channel->pdata;
 251
 252         if (count > xgbe_tx_avail_desc(ring)) {
 253                 netif_info(pdata, drv, pdata->netdev,
 254                            "Tx queue stopped, not enough descriptors available\n");
 255                 netif_stop_subqueue(pdata->netdev, channel->queue_index);
 256                 ring->tx.queue_stopped = 1;
 257
 258                 /* If we haven't notified the hardware because of xmit_more
 259                  * support, tell it now
 260                  */
 261                 if (ring->tx.xmit_more)
 262                         pdata->hw_if.tx_start_xmit(channel, ring);
 263
 264                 return NETDEV_TX_BUSY;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static int xgbe_calc_rx_buf_size(struct net_device *netdev, unsigned int mtu)
 271 {
 272         unsigned int rx_buf_size;
 273
 274         rx_buf_size = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
 275         rx_buf_size = clamp_val(rx_buf_size, XGBE_RX_MIN_BUF_SIZE, PAGE_SIZE);
 276
 277         rx_buf_size = (rx_buf_size + XGBE_RX_BUF_ALIGN - 1) &
 278                       ~(XGBE_RX_BUF_ALIGN - 1);
 279
 280         return rx_buf_size;
 281 }
 282
 283 static void xgbe_enable_rx_tx_int(struct xgbe_prv_data *pdata,
 284                                   struct xgbe_channel *channel)
 285 {
 286         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 287         enum xgbe_int int_id;
 288
 289         if (channel->tx_ring && channel->rx_ring)
 290                 int_id = XGMAC_INT_DMA_CH_SR_TI_RI;
 291         else if (channel->tx_ring)
 292                 int_id = XGMAC_INT_DMA_CH_SR_TI;
 293         else if (channel->rx_ring)
 294                 int_id = XGMAC_INT_DMA_CH_SR_RI;
 295         else
 296                 return;
 297
 298         hw_if->enable_int(channel, int_id);
 299 }
 300
 301 static void xgbe_enable_rx_tx_ints(struct xgbe_prv_data *pdata)
 302 {
 303         struct xgbe_channel *channel;
 304         unsigned int i;
 305
 306         channel = pdata->channel;
 307         for (i = 0; i < pdata->channel_count; i++, channel++)
 308                 xgbe_enable_rx_tx_int(pdata, channel);
 309 }
 310
 311 static void xgbe_disable_rx_tx_int(struct xgbe_prv_data *pdata,
 312                                    struct xgbe_channel *channel)
 313 {
 314         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 315         enum xgbe_int int_id;
 316
 317         if (channel->tx_ring && channel->rx_ring)
 318                 int_id = XGMAC_INT_DMA_CH_SR_TI_RI;
 319         else if (channel->tx_ring)
 320                 int_id = XGMAC_INT_DMA_CH_SR_TI;
 321         else if (channel->rx_ring)
 322                 int_id = XGMAC_INT_DMA_CH_SR_RI;
 323         else
 324                 return;
 325
 326         hw_if->disable_int(channel, int_id);
 327 }
 328
 329 static void xgbe_disable_rx_tx_ints(struct xgbe_prv_data *pdata)
 330 {
 331         struct xgbe_channel *channel;
 332         unsigned int i;
 333
 334         channel = pdata->channel;
 335         for (i = 0; i < pdata->channel_count; i++, channel++)
 336                 xgbe_disable_rx_tx_int(pdata, channel);
 337 }
 338
 339 static bool xgbe_ecc_sec(struct xgbe_prv_data *pdata, unsigned long *period,
 340                          unsigned int *count, const char *area)
 341 {
 342         if (time_before(jiffies, *period)) {
 343                 (*count)++;
 344         } else {
 345                 *period = jiffies + (ecc_sec_period * HZ);
 346                 *count = 1;
 347         }
 348
 349         if (*count > ecc_sec_info_threshold)
 350                 dev_warn_once(pdata->dev,
 351                               "%s ECC corrected errors exceed informational threshold\n",
 352                               area);
 353
 354         if (*count > ecc_sec_warn_threshold) {
 355                 dev_warn_once(pdata->dev,
 356                               "%s ECC corrected errors exceed warning threshold\n",
 357                               area);
 358                 return true;
 359         }
 360
 361         return false;
 362 }
 363
 364 static bool xgbe_ecc_ded(struct xgbe_prv_data *pdata, unsigned long *period,
 365                          unsigned int *count, const char *area)
 366 {
 367         if (time_before(jiffies, *period)) {
 368                 (*count)++;
 369         } else {
 370                 *period = jiffies + (ecc_ded_period * HZ);
 371                 *count = 1;
 372         }
 373
 374         if (*count > ecc_ded_threshold) {
 375                 netdev_alert(pdata->netdev,
 376                              "%s ECC detected errors exceed threshold\n",
 377                              area);
 378                 return true;
 379         }
 380
 381         return false;
 382 }
 383
 384 static irqreturn_t xgbe_ecc_isr(int irq, void *data)
 385 {
 386         struct xgbe_prv_data *pdata = data;
 387         unsigned int ecc_isr;
 388         bool stop = false;
 389
 390         /* Mask status with only the interrupts we care about */
 391         ecc_isr = XP_IOREAD(pdata, XP_ECC_ISR);
 392         ecc_isr &= XP_IOREAD(pdata, XP_ECC_IER);
 393         netif_dbg(pdata, intr, pdata->netdev, "ECC_ISR=%#010x\n", ecc_isr);
 394
 395         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, TX_DED)) {
 396                 stop |= xgbe_ecc_ded(pdata, &pdata->tx_ded_period,
 397                                      &pdata->tx_ded_count, "TX fifo");
 398         }
 399
 400         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, RX_DED)) {
 401                 stop |= xgbe_ecc_ded(pdata, &pdata->rx_ded_period,
 402                                      &pdata->rx_ded_count, "RX fifo");
 403         }
 404
 405         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, DESC_DED)) {
 406                 stop |= xgbe_ecc_ded(pdata, &pdata->desc_ded_period,
 407                                      &pdata->desc_ded_count,
 408                                      "descriptor cache");
 409         }
 410
 411         if (stop) {
 412                 pdata->hw_if.disable_ecc_ded(pdata);
 413                 schedule_work(&pdata->stopdev_work);
 414                 goto out;
 415         }
 416
 417         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, TX_SEC)) {
 418                 if (xgbe_ecc_sec(pdata, &pdata->tx_sec_period,
 419                                  &pdata->tx_sec_count, "TX fifo"))
 420                         pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_TX);
 421         }
 422
 423         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, RX_SEC))
 424                 if (xgbe_ecc_sec(pdata, &pdata->rx_sec_period,
 425                                  &pdata->rx_sec_count, "RX fifo"))
 426                         pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_RX);
 427
 428         if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, DESC_SEC))
 429                 if (xgbe_ecc_sec(pdata, &pdata->desc_sec_period,
 430                                  &pdata->desc_sec_count, "descriptor cache"))
 431                         pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_DESC);
 432
 433 out:
 434         /* Clear all ECC interrupts */
 435         XP_IOWRITE(pdata, XP_ECC_ISR, ecc_isr);
 436
 437         return IRQ_HANDLED;
 438 }
 439
 440 static irqreturn_t xgbe_isr(int irq, void *data)
 441 {
 442         struct xgbe_prv_data *pdata = data;
 443         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 444         struct xgbe_channel *channel;
 445         unsigned int dma_isr, dma_ch_isr;
 446         unsigned int mac_isr, mac_tssr, mac_mdioisr;
 447         unsigned int i;
 448
 449         /* The DMA interrupt status register also reports MAC and MTL
 450          * interrupts. So for polling mode, we just need to check for
 451          * this register to be non-zero
 452          */
 453         dma_isr = XGMAC_IOREAD(pdata, DMA_ISR);
 454         if (!dma_isr)
 455                 goto isr_done;
 456
 457         netif_dbg(pdata, intr, pdata->netdev, "DMA_ISR=%#010x\n", dma_isr);
 458
 459         for (i = 0; i < pdata->channel_count; i++) {
 460                 if (!(dma_isr & (1 << i)))
 461                         continue;
 462
 463                 channel = pdata->channel + i;
 464
 465                 dma_ch_isr = XGMAC_DMA_IOREAD(channel, DMA_CH_SR);
 466                 netif_dbg(pdata, intr, pdata->netdev, "DMA_CH%u_ISR=%#010x\n",
 467                           i, dma_ch_isr);
 468
 469                 /* The TI or RI interrupt bits may still be set even if using
 470                  * per channel DMA interrupts. Check to be sure those are not
 471                  * enabled before using the private data napi structure.
 472                  */
 473                 if (!pdata->per_channel_irq &&
 474                     (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, TI) ||
 475                      XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RI))) {
 476                         if (napi_schedule_prep(&pdata->napi)) {
 477                                 /* Disable Tx and Rx interrupts */
 478                                 xgbe_disable_rx_tx_ints(pdata);
 479
 480                                 /* Turn on polling */
 481                                 __napi_schedule_irqoff(&pdata->napi);
 482                         }
 483                 } else {
 484                         /* Don't clear Rx/Tx status if doing per channel DMA
 485                          * interrupts, these will be cleared by the ISR for
 486                          * per channel DMA interrupts.
 487                          */
 488                         XGMAC_SET_BITS(dma_ch_isr, DMA_CH_SR, TI, 0);
 489                         XGMAC_SET_BITS(dma_ch_isr, DMA_CH_SR, RI, 0);
 490                 }
 491
 492                 if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RBU))
 493                         pdata->ext_stats.rx_buffer_unavailable++;
 494
 495                 /* Restart the device on a Fatal Bus Error */
 496                 if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, FBE))
 497                         schedule_work(&pdata->restart_work);
 498
 499                 /* Clear interrupt signals */
 500                 XGMAC_DMA_IOWRITE(channel, DMA_CH_SR, dma_ch_isr);
 501         }
 502
 503         if (XGMAC_GET_BITS(dma_isr, DMA_ISR, MACIS)) {
 504                 mac_isr = XGMAC_IOREAD(pdata, MAC_ISR);
 505
 506                 netif_dbg(pdata, intr, pdata->netdev, "MAC_ISR=%#010x\n",
 507                           mac_isr);
 508
 509                 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCTXIS))
 510                         hw_if->tx_mmc_int(pdata);
 511
 512                 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCRXIS))
 513                         hw_if->rx_mmc_int(pdata);
 514
 515                 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, TSIS)) {
 516                         mac_tssr = XGMAC_IOREAD(pdata, MAC_TSSR);
 517
 518                         netif_dbg(pdata, intr, pdata->netdev,
 519                                   "MAC_TSSR=%#010x\n", mac_tssr);
 520
 521                         if (XGMAC_GET_BITS(mac_tssr, MAC_TSSR, TXTSC)) {
 522                                 /* Read Tx Timestamp to clear interrupt */
 523                                 pdata->tx_tstamp =
 524                                         hw_if->get_tx_tstamp(pdata);
 525                                 queue_work(pdata->dev_workqueue,
 526                                            &pdata->tx_tstamp_work);
 527                         }
 528                 }
 529
 530                 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, SMI)) {
 531                         mac_mdioisr = XGMAC_IOREAD(pdata, MAC_MDIOISR);
 532
 533                         netif_dbg(pdata, intr, pdata->netdev,
 534                                   "MAC_MDIOISR=%#010x\n", mac_mdioisr);
 535
 536                         if (XGMAC_GET_BITS(mac_mdioisr, MAC_MDIOISR,
 537                                            SNGLCOMPINT))
 538                                 complete(&pdata->mdio_complete);
 539                 }
 540         }
 541
 542 isr_done:
 543         /* If there is not a separate AN irq, handle it here */
 544         if (pdata->dev_irq == pdata->an_irq)
 545                 pdata->phy_if.an_isr(irq, pdata);
 546
 547         /* If there is not a separate ECC irq, handle it here */
 548         if (pdata->vdata->ecc_support && (pdata->dev_irq == pdata->ecc_irq))
 549                 xgbe_ecc_isr(irq, pdata);
 550
 551         /* If there is not a separate I2C irq, handle it here */
 552         if (pdata->vdata->i2c_support && (pdata->dev_irq == pdata->i2c_irq))
 553                 pdata->i2c_if.i2c_isr(irq, pdata);
 554
 555         return IRQ_HANDLED;
 556 }
 557
 558 static irqreturn_t xgbe_dma_isr(int irq, void *data)
 559 {
 560         struct xgbe_channel *channel = data;
 561         struct xgbe_prv_data *pdata = channel->pdata;
 562         unsigned int dma_status;
 563
 564         /* Per channel DMA interrupts are enabled, so we use the per
 565          * channel napi structure and not the private data napi structure
 566          */
 567         if (napi_schedule_prep(&channel->napi)) {
 568                 /* Disable Tx and Rx interrupts */
 569                 if (pdata->channel_irq_mode)
 570                         xgbe_disable_rx_tx_int(pdata, channel);
 571                 else
 572                         disable_irq_nosync(channel->dma_irq);
 573
 574                 /* Turn on polling */
 575                 __napi_schedule_irqoff(&channel->napi);
 576         }
 577
 578         /* Clear Tx/Rx signals */
 579         dma_status = 0;
 580         XGMAC_SET_BITS(dma_status, DMA_CH_SR, TI, 1);
 581         XGMAC_SET_BITS(dma_status, DMA_CH_SR, RI, 1);
 582         XGMAC_DMA_IOWRITE(channel, DMA_CH_SR, dma_status);
 583
 584         return IRQ_HANDLED;
 585 }
 586
 587 static void xgbe_tx_timer(unsigned long data)
 588 {
 589         struct xgbe_channel *channel = (struct xgbe_channel *)data;
 590         struct xgbe_prv_data *pdata = channel->pdata;
 591         struct napi_struct *napi;
 592
 593         DBGPR("-->xgbe_tx_timer\n");
 594
 595         napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
 596
 597         if (napi_schedule_prep(napi)) {
 598                 /* Disable Tx and Rx interrupts */
 599                 if (pdata->per_channel_irq)
 600                         if (pdata->channel_irq_mode)
 601                                 xgbe_disable_rx_tx_int(pdata, channel);
 602                         else
 603                                 disable_irq_nosync(channel->dma_irq);
 604                 else
 605                         xgbe_disable_rx_tx_ints(pdata);
 606
 607                 /* Turn on polling */
 608                 __napi_schedule(napi);
 609         }
 610
 611         channel->tx_timer_active = 0;
 612
 613         DBGPR("<--xgbe_tx_timer\n");
 614 }
 615
 616 static void xgbe_service(struct work_struct *work)
 617 {
 618         struct xgbe_prv_data *pdata = container_of(work,
 619                                                    struct xgbe_prv_data,
 620                                                    service_work);
 621
 622         pdata->phy_if.phy_status(pdata);
 623 }
 624
 625 static void xgbe_service_timer(unsigned long data)
 626 {
 627         struct xgbe_prv_data *pdata = (struct xgbe_prv_data *)data;
 628
 629         queue_work(pdata->dev_workqueue, &pdata->service_work);
 630
 631         mod_timer(&pdata->service_timer, jiffies + HZ);
 632 }
 633
 634 static void xgbe_init_timers(struct xgbe_prv_data *pdata)
 635 {
 636         struct xgbe_channel *channel;
 637         unsigned int i;
 638
 639         setup_timer(&pdata->service_timer, xgbe_service_timer,
 640                     (unsigned long)pdata);
 641
 642         channel = pdata->channel;
 643         for (i = 0; i < pdata->channel_count; i++, channel++) {
 644                 if (!channel->tx_ring)
 645                         break;
 646
 647                 setup_timer(&channel->tx_timer, xgbe_tx_timer,
 648                             (unsigned long)channel);
 649         }
 650 }
 651
 652 static void xgbe_start_timers(struct xgbe_prv_data *pdata)
 653 {
 654         mod_timer(&pdata->service_timer, jiffies + HZ);
 655 }
 656
 657 static void xgbe_stop_timers(struct xgbe_prv_data *pdata)
 658 {
 659         struct xgbe_channel *channel;
 660         unsigned int i;
 661
 662         del_timer_sync(&pdata->service_timer);
 663
 664         channel = pdata->channel;
 665         for (i = 0; i < pdata->channel_count; i++, channel++) {
 666                 if (!channel->tx_ring)
 667                         break;
 668
 669                 del_timer_sync(&channel->tx_timer);
 670         }
 671 }
 672
 673 void xgbe_get_all_hw_features(struct xgbe_prv_data *pdata)
 674 {
 675         unsigned int mac_hfr0, mac_hfr1, mac_hfr2;
 676         struct xgbe_hw_features *hw_feat = &pdata->hw_feat;
 677
 678         DBGPR("-->xgbe_get_all_hw_features\n");
 679
 680         mac_hfr0 = XGMAC_IOREAD(pdata, MAC_HWF0R);
 681         mac_hfr1 = XGMAC_IOREAD(pdata, MAC_HWF1R);
 682         mac_hfr2 = XGMAC_IOREAD(pdata, MAC_HWF2R);
 683
 684         memset(hw_feat, 0, sizeof(*hw_feat));
 685
 686         hw_feat->version = XGMAC_IOREAD(pdata, MAC_VR);
 687
 688         /* Hardware feature register 0 */
 689         hw_feat->gmii        = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, GMIISEL);
 690         hw_feat->vlhash      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, VLHASH);
 691         hw_feat->sma         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, SMASEL);
 692         hw_feat->rwk         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, RWKSEL);
 693         hw_feat->mgk         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, MGKSEL);
 694         hw_feat->mmc         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, MMCSEL);
 695         hw_feat->aoe         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, ARPOFFSEL);
 696         hw_feat->ts          = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TSSEL);
 697         hw_feat->eee         = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, EEESEL);
 698         hw_feat->tx_coe      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TXCOESEL);
 699         hw_feat->rx_coe      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, RXCOESEL);
 700         hw_feat->addn_mac    = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R,
 701                                               ADDMACADRSEL);
 702         hw_feat->ts_src      = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TSSTSSEL);
 703         hw_feat->sa_vlan_ins = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, SAVLANINS);
 704
 705         /* Hardware feature register 1 */
 706         hw_feat->rx_fifo_size  = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
 707                                                 RXFIFOSIZE);
 708         hw_feat->tx_fifo_size  = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
 709                                                 TXFIFOSIZE);
 710         hw_feat->adv_ts_hi     = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, ADVTHWORD);
 711         hw_feat->dma_width     = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, ADDR64);
 712         hw_feat->dcb           = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DCBEN);
 713         hw_feat->sph           = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, SPHEN);
 714         hw_feat->tso           = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, TSOEN);
 715         hw_feat->dma_debug     = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DBGMEMA);
 716         hw_feat->rss           = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, RSSEN);
 717         hw_feat->tc_cnt        = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, NUMTC);
 718         hw_feat->hash_table_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
 719                                                   HASHTBLSZ);
 720         hw_feat->l3l4_filter_num = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R,
 721                                                   L3L4FNUM);
 722
 723         /* Hardware feature register 2 */
 724         hw_feat->rx_q_cnt     = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, RXQCNT);
 725         hw_feat->tx_q_cnt     = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, TXQCNT);
 726         hw_feat->rx_ch_cnt    = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, RXCHCNT);
 727         hw_feat->tx_ch_cnt    = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, TXCHCNT);
 728         hw_feat->pps_out_num  = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, PPSOUTNUM);
 729         hw_feat->aux_snap_num = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, AUXSNAPNUM);
 730
 731         /* Translate the Hash Table size into actual number */
 732         switch (hw_feat->hash_table_size) {
 733         case 0:
 734                 break;
 735         case 1:
 736                 hw_feat->hash_table_size = 64;
 737                 break;
 738         case 2:
 739                 hw_feat->hash_table_size = 128;
 740                 break;
 741         case 3:
 742                 hw_feat->hash_table_size = 256;
 743                 break;
 744         }
 745
 746         /* Translate the address width setting into actual number */
 747         switch (hw_feat->dma_width) {
 748         case 0:
 749                 hw_feat->dma_width = 32;
 750                 break;
 751         case 1:
 752                 hw_feat->dma_width = 40;
 753                 break;
 754         case 2:
 755                 hw_feat->dma_width = 48;
 756                 break;
 757         default:
 758                 hw_feat->dma_width = 32;
 759         }
 760
 761         /* The Queue, Channel and TC counts are zero based so increment them
 762          * to get the actual number
 763          */
 764         hw_feat->rx_q_cnt++;
 765         hw_feat->tx_q_cnt++;
 766         hw_feat->rx_ch_cnt++;
 767         hw_feat->tx_ch_cnt++;
 768         hw_feat->tc_cnt++;
 769
 770         /* Translate the fifo sizes into actual numbers */
 771         hw_feat->rx_fifo_size = 1 << (hw_feat->rx_fifo_size + 7);
 772         hw_feat->tx_fifo_size = 1 << (hw_feat->tx_fifo_size + 7);
 773
 774         DBGPR("<--xgbe_get_all_hw_features\n");
 775 }
 776
 777 static void xgbe_napi_enable(struct xgbe_prv_data *pdata, unsigned int add)
 778 {
 779         struct xgbe_channel *channel;
 780         unsigned int i;
 781
 782         if (pdata->per_channel_irq) {
 783                 channel = pdata->channel;
 784                 for (i = 0; i < pdata->channel_count; i++, channel++) {
 785                         if (add)
 786                                 netif_napi_add(pdata->netdev, &channel->napi,
 787                                                xgbe_one_poll, NAPI_POLL_WEIGHT);
 788
 789                         napi_enable(&channel->napi);
 790                 }
 791         } else {
 792                 if (add)
 793                         netif_napi_add(pdata->netdev, &pdata->napi,
 794                                        xgbe_all_poll, NAPI_POLL_WEIGHT);
 795
 796                 napi_enable(&pdata->napi);
 797         }
 798 }
 799
 800 static void xgbe_napi_disable(struct xgbe_prv_data *pdata, unsigned int del)
 801 {
 802         struct xgbe_channel *channel;
 803         unsigned int i;
 804
 805         if (pdata->per_channel_irq) {
 806                 channel = pdata->channel;
 807                 for (i = 0; i < pdata->channel_count; i++, channel++) {
 808                         napi_disable(&channel->napi);
 809
 810                         if (del)
 811                                 netif_napi_del(&channel->napi);
 812                 }
 813         } else {
 814                 napi_disable(&pdata->napi);
 815
 816                 if (del)
 817                         netif_napi_del(&pdata->napi);
 818         }
 819 }
 820
 821 static int xgbe_request_irqs(struct xgbe_prv_data *pdata)
 822 {
 823         struct xgbe_channel *channel;
 824         struct net_device *netdev = pdata->netdev;
 825         unsigned int i;
 826         int ret;
 827
 828         ret = devm_request_irq(pdata->dev, pdata->dev_irq, xgbe_isr, 0,
 829                                netdev->name, pdata);
 830         if (ret) {
 831                 netdev_alert(netdev, "error requesting irq %d\n",
 832                              pdata->dev_irq);
 833                 return ret;
 834         }
 835
 836         if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq)) {
 837                 ret = devm_request_irq(pdata->dev, pdata->ecc_irq, xgbe_ecc_isr,
 838                                        0, pdata->ecc_name, pdata);
 839                 if (ret) {
 840                         netdev_alert(netdev, "error requesting ecc irq %d\n",
 841                                      pdata->ecc_irq);
 842                         goto err_dev_irq;
 843                 }
 844         }
 845
 846         if (!pdata->per_channel_irq)
 847                 return 0;
 848
 849         channel = pdata->channel;
 850         for (i = 0; i < pdata->channel_count; i++, channel++) {
 851                 snprintf(channel->dma_irq_name,
 852                          sizeof(channel->dma_irq_name) - 1,
 853                          "%s-TxRx-%u", netdev_name(netdev),
 854                          channel->queue_index);
 855
 856                 ret = devm_request_irq(pdata->dev, channel->dma_irq,
 857                                        xgbe_dma_isr, 0,
 858                                        channel->dma_irq_name, channel);
 859                 if (ret) {
 860                         netdev_alert(netdev, "error requesting irq %d\n",
 861                                      channel->dma_irq);
 862                         goto err_dma_irq;
 863                 }
 864         }
 865
 866         return 0;
 867
 868 err_dma_irq:
 869         /* Using an unsigned int, 'i' will go to UINT_MAX and exit */
 870         for (i--, channel--; i < pdata->channel_count; i--, channel--)
 871                 devm_free_irq(pdata->dev, channel->dma_irq, channel);
 872
 873         if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq))
 874                 devm_free_irq(pdata->dev, pdata->ecc_irq, pdata);
 875
 876 err_dev_irq:
 877         devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
 878
 879         return ret;
 880 }
 881
 882 static void xgbe_free_irqs(struct xgbe_prv_data *pdata)
 883 {
 884         struct xgbe_channel *channel;
 885         unsigned int i;
 886
 887         devm_free_irq(pdata->dev, pdata->dev_irq, pdata);
 888
 889         if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq))
 890                 devm_free_irq(pdata->dev, pdata->ecc_irq, pdata);
 891
 892         if (!pdata->per_channel_irq)
 893                 return;
 894
 895         channel = pdata->channel;
 896         for (i = 0; i < pdata->channel_count; i++, channel++)
 897                 devm_free_irq(pdata->dev, channel->dma_irq, channel);
 898 }
 899
 900 void xgbe_init_tx_coalesce(struct xgbe_prv_data *pdata)
 901 {
 902         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 903
 904         DBGPR("-->xgbe_init_tx_coalesce\n");
 905
 906         pdata->tx_usecs = XGMAC_INIT_DMA_TX_USECS;
 907         pdata->tx_frames = XGMAC_INIT_DMA_TX_FRAMES;
 908
 909         hw_if->config_tx_coalesce(pdata);
 910
 911         DBGPR("<--xgbe_init_tx_coalesce\n");
 912 }
 913
 914 void xgbe_init_rx_coalesce(struct xgbe_prv_data *pdata)
 915 {
 916         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 917
 918         DBGPR("-->xgbe_init_rx_coalesce\n");
 919
 920         pdata->rx_riwt = hw_if->usec_to_riwt(pdata, XGMAC_INIT_DMA_RX_USECS);
 921         pdata->rx_usecs = XGMAC_INIT_DMA_RX_USECS;
 922         pdata->rx_frames = XGMAC_INIT_DMA_RX_FRAMES;
 923
 924         hw_if->config_rx_coalesce(pdata);
 925
 926         DBGPR("<--xgbe_init_rx_coalesce\n");
 927 }
 928
 929 static void xgbe_free_tx_data(struct xgbe_prv_data *pdata)
 930 {
 931         struct xgbe_desc_if *desc_if = &pdata->desc_if;
 932         struct xgbe_channel *channel;
 933         struct xgbe_ring *ring;
 934         struct xgbe_ring_data *rdata;
 935         unsigned int i, j;
 936
 937         DBGPR("-->xgbe_free_tx_data\n");
 938
 939         channel = pdata->channel;
 940         for (i = 0; i < pdata->channel_count; i++, channel++) {
 941                 ring = channel->tx_ring;
 942                 if (!ring)
 943                         break;
 944
 945                 for (j = 0; j < ring->rdesc_count; j++) {
 946                         rdata = XGBE_GET_DESC_DATA(ring, j);
 947                         desc_if->unmap_rdata(pdata, rdata);
 948                 }
 949         }
 950
 951         DBGPR("<--xgbe_free_tx_data\n");
 952 }
 953
 954 static void xgbe_free_rx_data(struct xgbe_prv_data *pdata)
 955 {
 956         struct xgbe_desc_if *desc_if = &pdata->desc_if;
 957         struct xgbe_channel *channel;
 958         struct xgbe_ring *ring;
 959         struct xgbe_ring_data *rdata;
 960         unsigned int i, j;
 961
 962         DBGPR("-->xgbe_free_rx_data\n");
 963
 964         channel = pdata->channel;
 965         for (i = 0; i < pdata->channel_count; i++, channel++) {
 966                 ring = channel->rx_ring;
 967                 if (!ring)
 968                         break;
 969
 970                 for (j = 0; j < ring->rdesc_count; j++) {
 971                         rdata = XGBE_GET_DESC_DATA(ring, j);
 972                         desc_if->unmap_rdata(pdata, rdata);
 973                 }
 974         }
 975
 976         DBGPR("<--xgbe_free_rx_data\n");
 977 }
 978
 979 static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
 980 {
 981         pdata->phy_link = -1;
 982         pdata->phy_speed = SPEED_UNKNOWN;
 983
 984         return pdata->phy_if.phy_reset(pdata);
 985 }
 986
 987 int xgbe_powerdown(struct net_device *netdev, unsigned int caller)
 988 {
 989         struct xgbe_prv_data *pdata = netdev_priv(netdev);
 990         struct xgbe_hw_if *hw_if = &pdata->hw_if;
 991         unsigned long flags;
 992
 993         DBGPR("-->xgbe_powerdown\n");
 994
 995         if (!netif_running(netdev) ||
 996             (caller == XGMAC_IOCTL_CONTEXT && pdata->power_down)) {
 997                 netdev_alert(netdev, "Device is already powered down\n");
 998                 DBGPR("<--xgbe_powerdown\n");
 999                 return -EINVAL;
1000         }
1001
1002         spin_lock_irqsave(&pdata->lock, flags);
1003
1004         if (caller == XGMAC_DRIVER_CONTEXT)
1005                 netif_device_detach(netdev);
1006
1007         netif_tx_stop_all_queues(netdev);
1008
1009         xgbe_stop_timers(pdata);
1010         flush_workqueue(pdata->dev_workqueue);
1011
1012         hw_if->powerdown_tx(pdata);
1013         hw_if->powerdown_rx(pdata);
1014
1015         xgbe_napi_disable(pdata, 0);
1016
1017         pdata->power_down = 1;
1018
1019         spin_unlock_irqrestore(&pdata->lock, flags);
1020
1021         DBGPR("<--xgbe_powerdown\n");
1022
1023         return 0;
1024 }
1025
1026 int xgbe_powerup(struct net_device *netdev, unsigned int caller)
1027 {
1028         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1029         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1030         unsigned long flags;
1031
1032         DBGPR("-->xgbe_powerup\n");
1033
1034         if (!netif_running(netdev) ||
1035             (caller == XGMAC_IOCTL_CONTEXT && !pdata->power_down)) {
1036                 netdev_alert(netdev, "Device is already powered up\n");
1037                 DBGPR("<--xgbe_powerup\n");
1038                 return -EINVAL;
1039         }
1040
1041         spin_lock_irqsave(&pdata->lock, flags);
1042
1043         pdata->power_down = 0;
1044
1045         xgbe_napi_enable(pdata, 0);
1046
1047         hw_if->powerup_tx(pdata);
1048         hw_if->powerup_rx(pdata);
1049
1050         if (caller == XGMAC_DRIVER_CONTEXT)
1051                 netif_device_attach(netdev);
1052
1053         netif_tx_start_all_queues(netdev);
1054
1055         xgbe_start_timers(pdata);
1056
1057         spin_unlock_irqrestore(&pdata->lock, flags);
1058
1059         DBGPR("<--xgbe_powerup\n");
1060
1061         return 0;
1062 }
1063
1064 static int xgbe_start(struct xgbe_prv_data *pdata)
1065 {
1066         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1067         struct xgbe_phy_if *phy_if = &pdata->phy_if;
1068         struct net_device *netdev = pdata->netdev;
1069         int ret;
1070
1071         DBGPR("-->xgbe_start\n");
1072
1073         ret = hw_if->init(pdata);
1074         if (ret)
1075                 return ret;
1076
1077         xgbe_napi_enable(pdata, 1);
1078
1079         ret = xgbe_request_irqs(pdata);
1080         if (ret)
1081                 goto err_napi;
1082
1083         ret = phy_if->phy_start(pdata);
1084         if (ret)
1085                 goto err_irqs;
1086
1087         hw_if->enable_tx(pdata);
1088         hw_if->enable_rx(pdata);
1089
1090         netif_tx_start_all_queues(netdev);
1091
1092         xgbe_start_timers(pdata);
1093         queue_work(pdata->dev_workqueue, &pdata->service_work);
1094
1095         clear_bit(XGBE_STOPPED, &pdata->dev_state);
1096
1097         DBGPR("<--xgbe_start\n");
1098
1099         return 0;
1100
1101 err_irqs:
1102         xgbe_free_irqs(pdata);
1103
1104 err_napi:
1105         xgbe_napi_disable(pdata, 1);
1106
1107         hw_if->exit(pdata);
1108
1109         return ret;
1110 }
1111
1112 static void xgbe_stop(struct xgbe_prv_data *pdata)
1113 {
1114         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1115         struct xgbe_phy_if *phy_if = &pdata->phy_if;
1116         struct xgbe_channel *channel;
1117         struct net_device *netdev = pdata->netdev;
1118         struct netdev_queue *txq;
1119         unsigned int i;
1120
1121         DBGPR("-->xgbe_stop\n");
1122
1123         if (test_bit(XGBE_STOPPED, &pdata->dev_state))
1124                 return;
1125
1126         netif_tx_stop_all_queues(netdev);
1127
1128         xgbe_stop_timers(pdata);
1129         flush_workqueue(pdata->dev_workqueue);
1130
1131         hw_if->disable_tx(pdata);
1132         hw_if->disable_rx(pdata);
1133
1134         phy_if->phy_stop(pdata);
1135
1136         xgbe_free_irqs(pdata);
1137
1138         xgbe_napi_disable(pdata, 1);
1139
1140         hw_if->exit(pdata);
1141
1142         channel = pdata->channel;
1143         for (i = 0; i < pdata->channel_count; i++, channel++) {
1144                 if (!channel->tx_ring)
1145                         continue;
1146
1147                 txq = netdev_get_tx_queue(netdev, channel->queue_index);
1148                 netdev_tx_reset_queue(txq);
1149         }
1150
1151         set_bit(XGBE_STOPPED, &pdata->dev_state);
1152
1153         DBGPR("<--xgbe_stop\n");
1154 }
1155
1156 static void xgbe_stopdev(struct work_struct *work)
1157 {
1158         struct xgbe_prv_data *pdata = container_of(work,
1159                                                    struct xgbe_prv_data,
1160                                                    stopdev_work);
1161
1162         rtnl_lock();
1163
1164         xgbe_stop(pdata);
1165
1166         xgbe_free_tx_data(pdata);
1167         xgbe_free_rx_data(pdata);
1168
1169         rtnl_unlock();
1170
1171         netdev_alert(pdata->netdev, "device stopped\n");
1172 }
1173
1174 static void xgbe_restart_dev(struct xgbe_prv_data *pdata)
1175 {
1176         DBGPR("-->xgbe_restart_dev\n");
1177
1178         /* If not running, "restart" will happen on open */
1179         if (!netif_running(pdata->netdev))
1180                 return;
1181
1182         xgbe_stop(pdata);
1183
1184         xgbe_free_tx_data(pdata);
1185         xgbe_free_rx_data(pdata);
1186
1187         xgbe_start(pdata);
1188
1189         DBGPR("<--xgbe_restart_dev\n");
1190 }
1191
1192 static void xgbe_restart(struct work_struct *work)
1193 {
1194         struct xgbe_prv_data *pdata = container_of(work,
1195                                                    struct xgbe_prv_data,
1196                                                    restart_work);
1197
1198         rtnl_lock();
1199
1200         xgbe_restart_dev(pdata);
1201
1202         rtnl_unlock();
1203 }
1204
1205 static void xgbe_tx_tstamp(struct work_struct *work)
1206 {
1207         struct xgbe_prv_data *pdata = container_of(work,
1208                                                    struct xgbe_prv_data,
1209                                                    tx_tstamp_work);
1210         struct skb_shared_hwtstamps hwtstamps;
1211         u64 nsec;
1212         unsigned long flags;
1213
1214         if (pdata->tx_tstamp) {
1215                 nsec = timecounter_cyc2time(&pdata->tstamp_tc,
1216                                             pdata->tx_tstamp);
1217
1218                 memset(&hwtstamps, 0, sizeof(hwtstamps));
1219                 hwtstamps.hwtstamp = ns_to_ktime(nsec);
1220                 skb_tstamp_tx(pdata->tx_tstamp_skb, &hwtstamps);
1221         }
1222
1223         dev_kfree_skb_any(pdata->tx_tstamp_skb);
1224
1225         spin_lock_irqsave(&pdata->tstamp_lock, flags);
1226         pdata->tx_tstamp_skb = NULL;
1227         spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
1228 }
1229
1230 static int xgbe_get_hwtstamp_settings(struct xgbe_prv_data *pdata,
1231                                       struct ifreq *ifreq)
1232 {
1233         if (copy_to_user(ifreq->ifr_data, &pdata->tstamp_config,
1234                          sizeof(pdata->tstamp_config)))
1235                 return -EFAULT;
1236
1237         return 0;
1238 }
1239
1240 static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata,
1241                                       struct ifreq *ifreq)
1242 {
1243         struct hwtstamp_config config;
1244         unsigned int mac_tscr;
1245
1246         if (copy_from_user(&config, ifreq->ifr_data, sizeof(config)))
1247                 return -EFAULT;
1248
1249         if (config.flags)
1250                 return -EINVAL;
1251
1252         mac_tscr = 0;
1253
1254         switch (config.tx_type) {
1255         case HWTSTAMP_TX_OFF:
1256                 break;
1257
1258         case HWTSTAMP_TX_ON:
1259                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1260                 break;
1261
1262         default:
1263                 return -ERANGE;
1264         }
1265
1266         switch (config.rx_filter) {
1267         case HWTSTAMP_FILTER_NONE:
1268                 break;
1269
1270         case HWTSTAMP_FILTER_ALL:
1271                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 1);
1272                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1273                 break;
1274
1275         /* PTP v2, UDP, any kind of event packet */
1276         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1277                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1278         /* PTP v1, UDP, any kind of event packet */
1279         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1280                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1281                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1282                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1283                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1284                 break;
1285
1286         /* PTP v2, UDP, Sync packet */
1287         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1288                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1289         /* PTP v1, UDP, Sync packet */
1290         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1291                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1292                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1293                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1294                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1295                 break;
1296
1297         /* PTP v2, UDP, Delay_req packet */
1298         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1299                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1300         /* PTP v1, UDP, Delay_req packet */
1301         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1302                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1303                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1304                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1305                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1306                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1307                 break;
1308
1309         /* 802.AS1, Ethernet, any kind of event packet */
1310         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1311                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1312                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1313                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1314                 break;
1315
1316         /* 802.AS1, Ethernet, Sync packet */
1317         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1318                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1319                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1320                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1321                 break;
1322
1323         /* 802.AS1, Ethernet, Delay_req packet */
1324         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1325                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1);
1326                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1327                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1328                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1329                 break;
1330
1331         /* PTP v2/802.AS1, any layer, any kind of event packet */
1332         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1333                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1334                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1335                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1336                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1337                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1);
1338                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1339                 break;
1340
1341         /* PTP v2/802.AS1, any layer, Sync packet */
1342         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1343                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1344                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1345                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1346                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1347                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1348                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1349                 break;
1350
1351         /* PTP v2/802.AS1, any layer, Delay_req packet */
1352         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1353                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
1354                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1);
1355                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
1356                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
1357                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1);
1358                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1);
1359                 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1);
1360                 break;
1361
1362         default:
1363                 return -ERANGE;
1364         }
1365
1366         pdata->hw_if.config_tstamp(pdata, mac_tscr);
1367
1368         memcpy(&pdata->tstamp_config, &config, sizeof(config));
1369
1370         return 0;
1371 }
1372
1373 static void xgbe_prep_tx_tstamp(struct xgbe_prv_data *pdata,
1374                                 struct sk_buff *skb,
1375                                 struct xgbe_packet_data *packet)
1376 {
1377         unsigned long flags;
1378
1379         if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP)) {
1380                 spin_lock_irqsave(&pdata->tstamp_lock, flags);
1381                 if (pdata->tx_tstamp_skb) {
1382                         /* Another timestamp in progress, ignore this one */
1383                         XGMAC_SET_BITS(packet->attributes,
1384                                        TX_PACKET_ATTRIBUTES, PTP, 0);
1385                 } else {
1386                         pdata->tx_tstamp_skb = skb_get(skb);
1387                         skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1388                 }
1389                 spin_unlock_irqrestore(&pdata->tstamp_lock, flags);
1390         }
1391
1392         if (!XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP))
1393                 skb_tx_timestamp(skb);
1394 }
1395
1396 static void xgbe_prep_vlan(struct sk_buff *skb, struct xgbe_packet_data *packet)
1397 {
1398         if (skb_vlan_tag_present(skb))
1399                 packet->vlan_ctag = skb_vlan_tag_get(skb);
1400 }
1401
1402 static int xgbe_prep_tso(struct sk_buff *skb, struct xgbe_packet_data *packet)
1403 {
1404         int ret;
1405
1406         if (!XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1407                             TSO_ENABLE))
1408                 return 0;
1409
1410         ret = skb_cow_head(skb, 0);
1411         if (ret)
1412                 return ret;
1413
1414         packet->header_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
1415         packet->tcp_header_len = tcp_hdrlen(skb);
1416         packet->tcp_payload_len = skb->len - packet->header_len;
1417         packet->mss = skb_shinfo(skb)->gso_size;
1418         DBGPR("  packet->header_len=%u\n", packet->header_len);
1419         DBGPR("  packet->tcp_header_len=%u, packet->tcp_payload_len=%u\n",
1420               packet->tcp_header_len, packet->tcp_payload_len);
1421         DBGPR("  packet->mss=%u\n", packet->mss);
1422
1423         /* Update the number of packets that will ultimately be transmitted
1424          * along with the extra bytes for each extra packet
1425          */
1426         packet->tx_packets = skb_shinfo(skb)->gso_segs;
1427         packet->tx_bytes += (packet->tx_packets - 1) * packet->header_len;
1428
1429         return 0;
1430 }
1431
1432 static int xgbe_is_tso(struct sk_buff *skb)
1433 {
1434         if (skb->ip_summed != CHECKSUM_PARTIAL)
1435                 return 0;
1436
1437         if (!skb_is_gso(skb))
1438                 return 0;
1439
1440         DBGPR("  TSO packet to be processed\n");
1441
1442         return 1;
1443 }
1444
1445 static void xgbe_packet_info(struct xgbe_prv_data *pdata,
1446                              struct xgbe_ring *ring, struct sk_buff *skb,
1447                              struct xgbe_packet_data *packet)
1448 {
1449         struct skb_frag_struct *frag;
1450         unsigned int context_desc;
1451         unsigned int len;
1452         unsigned int i;
1453
1454         packet->skb = skb;
1455
1456         context_desc = 0;
1457         packet->rdesc_count = 0;
1458
1459         packet->tx_packets = 1;
1460         packet->tx_bytes = skb->len;
1461
1462         if (xgbe_is_tso(skb)) {
1463                 /* TSO requires an extra descriptor if mss is different */
1464                 if (skb_shinfo(skb)->gso_size != ring->tx.cur_mss) {
1465                         context_desc = 1;
1466                         packet->rdesc_count++;
1467                 }
1468
1469                 /* TSO requires an extra descriptor for TSO header */
1470                 packet->rdesc_count++;
1471
1472                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1473                                TSO_ENABLE, 1);
1474                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1475                                CSUM_ENABLE, 1);
1476         } else if (skb->ip_summed == CHECKSUM_PARTIAL)
1477                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1478                                CSUM_ENABLE, 1);
1479
1480         if (skb_vlan_tag_present(skb)) {
1481                 /* VLAN requires an extra descriptor if tag is different */
1482                 if (skb_vlan_tag_get(skb) != ring->tx.cur_vlan_ctag)
1483                         /* We can share with the TSO context descriptor */
1484                         if (!context_desc) {
1485                                 context_desc = 1;
1486                                 packet->rdesc_count++;
1487                         }
1488
1489                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1490                                VLAN_CTAG, 1);
1491         }
1492
1493         if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1494             (pdata->tstamp_config.tx_type == HWTSTAMP_TX_ON))
1495                 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
1496                                PTP, 1);
1497
1498         for (len = skb_headlen(skb); len;) {
1499                 packet->rdesc_count++;
1500                 len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
1501         }
1502
1503         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1504                 frag = &skb_shinfo(skb)->frags[i];
1505                 for (len = skb_frag_size(frag); len; ) {
1506                         packet->rdesc_count++;
1507                         len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE);
1508                 }
1509         }
1510 }
1511
1512 static int xgbe_open(struct net_device *netdev)
1513 {
1514         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1515         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1516         int ret;
1517
1518         DBGPR("-->xgbe_open\n");
1519
1520         /* Reset the phy settings */
1521         ret = xgbe_phy_reset(pdata);
1522         if (ret)
1523                 return ret;
1524
1525         /* Enable the clocks */
1526         ret = clk_prepare_enable(pdata->sysclk);
1527         if (ret) {
1528                 netdev_alert(netdev, "dma clk_prepare_enable failed\n");
1529                 return ret;
1530         }
1531
1532         ret = clk_prepare_enable(pdata->ptpclk);
1533         if (ret) {
1534                 netdev_alert(netdev, "ptp clk_prepare_enable failed\n");
1535                 goto err_sysclk;
1536         }
1537
1538         /* Calculate the Rx buffer size before allocating rings */
1539         ret = xgbe_calc_rx_buf_size(netdev, netdev->mtu);
1540         if (ret < 0)
1541                 goto err_ptpclk;
1542         pdata->rx_buf_size = ret;
1543
1544         /* Allocate the channel and ring structures */
1545         ret = xgbe_alloc_channels(pdata);
1546         if (ret)
1547                 goto err_ptpclk;
1548
1549         /* Allocate the ring descriptors and buffers */
1550         ret = desc_if->alloc_ring_resources(pdata);
1551         if (ret)
1552                 goto err_channels;
1553
1554         INIT_WORK(&pdata->service_work, xgbe_service);
1555         INIT_WORK(&pdata->restart_work, xgbe_restart);
1556         INIT_WORK(&pdata->stopdev_work, xgbe_stopdev);
1557         INIT_WORK(&pdata->tx_tstamp_work, xgbe_tx_tstamp);
1558         xgbe_init_timers(pdata);
1559
1560         ret = xgbe_start(pdata);
1561         if (ret)
1562                 goto err_rings;
1563
1564         clear_bit(XGBE_DOWN, &pdata->dev_state);
1565
1566         DBGPR("<--xgbe_open\n");
1567
1568         return 0;
1569
1570 err_rings:
1571         desc_if->free_ring_resources(pdata);
1572
1573 err_channels:
1574         xgbe_free_channels(pdata);
1575
1576 err_ptpclk:
1577         clk_disable_unprepare(pdata->ptpclk);
1578
1579 err_sysclk:
1580         clk_disable_unprepare(pdata->sysclk);
1581
1582         return ret;
1583 }
1584
1585 static int xgbe_close(struct net_device *netdev)
1586 {
1587         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1588         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1589
1590         DBGPR("-->xgbe_close\n");
1591
1592         /* Stop the device */
1593         xgbe_stop(pdata);
1594
1595         /* Free the ring descriptors and buffers */
1596         desc_if->free_ring_resources(pdata);
1597
1598         /* Free the channel and ring structures */
1599         xgbe_free_channels(pdata);
1600
1601         /* Disable the clocks */
1602         clk_disable_unprepare(pdata->ptpclk);
1603         clk_disable_unprepare(pdata->sysclk);
1604
1605         set_bit(XGBE_DOWN, &pdata->dev_state);
1606
1607         DBGPR("<--xgbe_close\n");
1608
1609         return 0;
1610 }
1611
1612 static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
1613 {
1614         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1615         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1616         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1617         struct xgbe_channel *channel;
1618         struct xgbe_ring *ring;
1619         struct xgbe_packet_data *packet;
1620         struct netdev_queue *txq;
1621         int ret;
1622
1623         DBGPR("-->xgbe_xmit: skb->len = %d\n", skb->len);
1624
1625         channel = pdata->channel + skb->queue_mapping;
1626         txq = netdev_get_tx_queue(netdev, channel->queue_index);
1627         ring = channel->tx_ring;
1628         packet = &ring->packet_data;
1629
1630         ret = NETDEV_TX_OK;
1631
1632         if (skb->len == 0) {
1633                 netif_err(pdata, tx_err, netdev,
1634                           "empty skb received from stack\n");
1635                 dev_kfree_skb_any(skb);
1636                 goto tx_netdev_return;
1637         }
1638
1639         /* Calculate preliminary packet info */
1640         memset(packet, 0, sizeof(*packet));
1641         xgbe_packet_info(pdata, ring, skb, packet);
1642
1643         /* Check that there are enough descriptors available */
1644         ret = xgbe_maybe_stop_tx_queue(channel, ring, packet->rdesc_count);
1645         if (ret)
1646                 goto tx_netdev_return;
1647
1648         ret = xgbe_prep_tso(skb, packet);
1649         if (ret) {
1650                 netif_err(pdata, tx_err, netdev,
1651                           "error processing TSO packet\n");
1652                 dev_kfree_skb_any(skb);
1653                 goto tx_netdev_return;
1654         }
1655         xgbe_prep_vlan(skb, packet);
1656
1657         if (!desc_if->map_tx_skb(channel, skb)) {
1658                 dev_kfree_skb_any(skb);
1659                 goto tx_netdev_return;
1660         }
1661
1662         xgbe_prep_tx_tstamp(pdata, skb, packet);
1663
1664         /* Report on the actual number of bytes (to be) sent */
1665         netdev_tx_sent_queue(txq, packet->tx_bytes);
1666
1667         /* Configure required descriptor fields for transmission */
1668         hw_if->dev_xmit(channel);
1669
1670         if (netif_msg_pktdata(pdata))
1671                 xgbe_print_pkt(netdev, skb, true);
1672
1673         /* Stop the queue in advance if there may not be enough descriptors */
1674         xgbe_maybe_stop_tx_queue(channel, ring, XGBE_TX_MAX_DESCS);
1675
1676         ret = NETDEV_TX_OK;
1677
1678 tx_netdev_return:
1679         return ret;
1680 }
1681
1682 static void xgbe_set_rx_mode(struct net_device *netdev)
1683 {
1684         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1685         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1686
1687         DBGPR("-->xgbe_set_rx_mode\n");
1688
1689         hw_if->config_rx_mode(pdata);
1690
1691         DBGPR("<--xgbe_set_rx_mode\n");
1692 }
1693
1694 static int xgbe_set_mac_address(struct net_device *netdev, void *addr)
1695 {
1696         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1697         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1698         struct sockaddr *saddr = addr;
1699
1700         DBGPR("-->xgbe_set_mac_address\n");
1701
1702         if (!is_valid_ether_addr(saddr->sa_data))
1703                 return -EADDRNOTAVAIL;
1704
1705         memcpy(netdev->dev_addr, saddr->sa_data, netdev->addr_len);
1706
1707         hw_if->set_mac_address(pdata, netdev->dev_addr);
1708
1709         DBGPR("<--xgbe_set_mac_address\n");
1710
1711         return 0;
1712 }
1713
1714 static int xgbe_ioctl(struct net_device *netdev, struct ifreq *ifreq, int cmd)
1715 {
1716         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1717         int ret;
1718
1719         switch (cmd) {
1720         case SIOCGHWTSTAMP:
1721                 ret = xgbe_get_hwtstamp_settings(pdata, ifreq);
1722                 break;
1723
1724         case SIOCSHWTSTAMP:
1725                 ret = xgbe_set_hwtstamp_settings(pdata, ifreq);
1726                 break;
1727
1728         default:
1729                 ret = -EOPNOTSUPP;
1730         }
1731
1732         return ret;
1733 }
1734
1735 static int xgbe_change_mtu(struct net_device *netdev, int mtu)
1736 {
1737         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1738         int ret;
1739
1740         DBGPR("-->xgbe_change_mtu\n");
1741
1742         ret = xgbe_calc_rx_buf_size(netdev, mtu);
1743         if (ret < 0)
1744                 return ret;
1745
1746         pdata->rx_buf_size = ret;
1747         netdev->mtu = mtu;
1748
1749         xgbe_restart_dev(pdata);
1750
1751         DBGPR("<--xgbe_change_mtu\n");
1752
1753         return 0;
1754 }
1755
1756 static void xgbe_tx_timeout(struct net_device *netdev)
1757 {
1758         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1759
1760         netdev_warn(netdev, "tx timeout, device restarting\n");
1761         schedule_work(&pdata->restart_work);
1762 }
1763
1764 static void xgbe_get_stats64(struct net_device *netdev,
1765                              struct rtnl_link_stats64 *s)
1766 {
1767         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1768         struct xgbe_mmc_stats *pstats = &pdata->mmc_stats;
1769
1770         DBGPR("-->%s\n", __func__);
1771
1772         pdata->hw_if.read_mmc_stats(pdata);
1773
1774         s->rx_packets = pstats->rxframecount_gb;
1775         s->rx_bytes = pstats->rxoctetcount_gb;
1776         s->rx_errors = pstats->rxframecount_gb -
1777                        pstats->rxbroadcastframes_g -
1778                        pstats->rxmulticastframes_g -
1779                        pstats->rxunicastframes_g;
1780         s->multicast = pstats->rxmulticastframes_g;
1781         s->rx_length_errors = pstats->rxlengtherror;
1782         s->rx_crc_errors = pstats->rxcrcerror;
1783         s->rx_fifo_errors = pstats->rxfifooverflow;
1784
1785         s->tx_packets = pstats->txframecount_gb;
1786         s->tx_bytes = pstats->txoctetcount_gb;
1787         s->tx_errors = pstats->txframecount_gb - pstats->txframecount_g;
1788         s->tx_dropped = netdev->stats.tx_dropped;
1789
1790         DBGPR("<--%s\n", __func__);
1791 }
1792
1793 static int xgbe_vlan_rx_add_vid(struct net_device *netdev, __be16 proto,
1794                                 u16 vid)
1795 {
1796         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1797         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1798
1799         DBGPR("-->%s\n", __func__);
1800
1801         set_bit(vid, pdata->active_vlans);
1802         hw_if->update_vlan_hash_table(pdata);
1803
1804         DBGPR("<--%s\n", __func__);
1805
1806         return 0;
1807 }
1808
1809 static int xgbe_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto,
1810                                  u16 vid)
1811 {
1812         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1813         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1814
1815         DBGPR("-->%s\n", __func__);
1816
1817         clear_bit(vid, pdata->active_vlans);
1818         hw_if->update_vlan_hash_table(pdata);
1819
1820         DBGPR("<--%s\n", __func__);
1821
1822         return 0;
1823 }
1824
1825 #ifdef CONFIG_NET_POLL_CONTROLLER
1826 static void xgbe_poll_controller(struct net_device *netdev)
1827 {
1828         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1829         struct xgbe_channel *channel;
1830         unsigned int i;
1831
1832         DBGPR("-->xgbe_poll_controller\n");
1833
1834         if (pdata->per_channel_irq) {
1835                 channel = pdata->channel;
1836                 for (i = 0; i < pdata->channel_count; i++, channel++)
1837                         xgbe_dma_isr(channel->dma_irq, channel);
1838         } else {
1839                 disable_irq(pdata->dev_irq);
1840                 xgbe_isr(pdata->dev_irq, pdata);
1841                 enable_irq(pdata->dev_irq);
1842         }
1843
1844         DBGPR("<--xgbe_poll_controller\n");
1845 }
1846 #endif /* End CONFIG_NET_POLL_CONTROLLER */
1847
1848 static int xgbe_setup_tc(struct net_device *netdev, u32 handle, __be16 proto,
1849                          struct tc_to_netdev *tc_to_netdev)
1850 {
1851         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1852         u8 tc;
1853
1854         if (tc_to_netdev->type != TC_SETUP_MQPRIO)
1855                 return -EINVAL;
1856
1857         tc = tc_to_netdev->tc;
1858
1859         if (tc > pdata->hw_feat.tc_cnt)
1860                 return -EINVAL;
1861
1862         pdata->num_tcs = tc;
1863         pdata->hw_if.config_tc(pdata);
1864
1865         return 0;
1866 }
1867
1868 static int xgbe_set_features(struct net_device *netdev,
1869                              netdev_features_t features)
1870 {
1871         struct xgbe_prv_data *pdata = netdev_priv(netdev);
1872         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1873         netdev_features_t rxhash, rxcsum, rxvlan, rxvlan_filter;
1874         int ret = 0;
1875
1876         rxhash = pdata->netdev_features & NETIF_F_RXHASH;
1877         rxcsum = pdata->netdev_features & NETIF_F_RXCSUM;
1878         rxvlan = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_RX;
1879         rxvlan_filter = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_FILTER;
1880
1881         if ((features & NETIF_F_RXHASH) && !rxhash)
1882                 ret = hw_if->enable_rss(pdata);
1883         else if (!(features & NETIF_F_RXHASH) && rxhash)
1884                 ret = hw_if->disable_rss(pdata);
1885         if (ret)
1886                 return ret;
1887
1888         if ((features & NETIF_F_RXCSUM) && !rxcsum)
1889                 hw_if->enable_rx_csum(pdata);
1890         else if (!(features & NETIF_F_RXCSUM) && rxcsum)
1891                 hw_if->disable_rx_csum(pdata);
1892
1893         if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan)
1894                 hw_if->enable_rx_vlan_stripping(pdata);
1895         else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) && rxvlan)
1896                 hw_if->disable_rx_vlan_stripping(pdata);
1897
1898         if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) && !rxvlan_filter)
1899                 hw_if->enable_rx_vlan_filtering(pdata);
1900         else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) && rxvlan_filter)
1901                 hw_if->disable_rx_vlan_filtering(pdata);
1902
1903         pdata->netdev_features = features;
1904
1905         DBGPR("<--xgbe_set_features\n");
1906
1907         return 0;
1908 }
1909
1910 static const struct net_device_ops xgbe_netdev_ops = {
1911         .ndo_open               = xgbe_open,
1912         .ndo_stop               = xgbe_close,
1913         .ndo_start_xmit         = xgbe_xmit,
1914         .ndo_set_rx_mode        = xgbe_set_rx_mode,
1915         .ndo_set_mac_address    = xgbe_set_mac_address,
1916         .ndo_validate_addr      = eth_validate_addr,
1917         .ndo_do_ioctl           = xgbe_ioctl,
1918         .ndo_change_mtu         = xgbe_change_mtu,
1919         .ndo_tx_timeout         = xgbe_tx_timeout,
1920         .ndo_get_stats64        = xgbe_get_stats64,
1921         .ndo_vlan_rx_add_vid    = xgbe_vlan_rx_add_vid,
1922         .ndo_vlan_rx_kill_vid   = xgbe_vlan_rx_kill_vid,
1923 #ifdef CONFIG_NET_POLL_CONTROLLER
1924         .ndo_poll_controller    = xgbe_poll_controller,
1925 #endif
1926         .ndo_setup_tc           = xgbe_setup_tc,
1927         .ndo_set_features       = xgbe_set_features,
1928 };
1929
1930 const struct net_device_ops *xgbe_get_netdev_ops(void)
1931 {
1932         return &xgbe_netdev_ops;
1933 }
1934
1935 static void xgbe_rx_refresh(struct xgbe_channel *channel)
1936 {
1937         struct xgbe_prv_data *pdata = channel->pdata;
1938         struct xgbe_hw_if *hw_if = &pdata->hw_if;
1939         struct xgbe_desc_if *desc_if = &pdata->desc_if;
1940         struct xgbe_ring *ring = channel->rx_ring;
1941         struct xgbe_ring_data *rdata;
1942
1943         while (ring->dirty != ring->cur) {
1944                 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
1945
1946                 /* Reset rdata values */
1947                 desc_if->unmap_rdata(pdata, rdata);
1948
1949                 if (desc_if->map_rx_buffer(pdata, ring, rdata))
1950                         break;
1951
1952                 hw_if->rx_desc_reset(pdata, rdata, ring->dirty);
1953
1954                 ring->dirty++;
1955         }
1956
1957         /* Make sure everything is written before the register write */
1958         wmb();
1959
1960         /* Update the Rx Tail Pointer Register with address of
1961          * the last cleaned entry */
1962         rdata = XGBE_GET_DESC_DATA(ring, ring->dirty - 1);
1963         XGMAC_DMA_IOWRITE(channel, DMA_CH_RDTR_LO,
1964                           lower_32_bits(rdata->rdesc_dma));
1965 }
1966
1967 static struct sk_buff *xgbe_create_skb(struct xgbe_prv_data *pdata,
1968                                        struct napi_struct *napi,
1969                                        struct xgbe_ring_data *rdata,
1970                                        unsigned int len)
1971 {
1972         struct sk_buff *skb;
1973         u8 *packet;
1974
1975         skb = napi_alloc_skb(napi, rdata->rx.hdr.dma_len);
1976         if (!skb)
1977                 return NULL;
1978
1979         /* Pull in the header buffer which may contain just the header
1980          * or the header plus data
1981          */
1982         dma_sync_single_range_for_cpu(pdata->dev, rdata->rx.hdr.dma_base,
1983                                       rdata->rx.hdr.dma_off,
1984                                       rdata->rx.hdr.dma_len, DMA_FROM_DEVICE);
1985
1986         packet = page_address(rdata->rx.hdr.pa.pages) +
1987                  rdata->rx.hdr.pa.pages_offset;
1988         skb_copy_to_linear_data(skb, packet, len);
1989         skb_put(skb, len);
1990
1991         return skb;
1992 }
1993
1994 static unsigned int xgbe_rx_buf1_len(struct xgbe_ring_data *rdata,
1995                                      struct xgbe_packet_data *packet)
1996 {
1997         /* Always zero if not the first descriptor */
1998         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, FIRST))
1999                 return 0;
2000
2001         /* First descriptor with split header, return header length */
2002         if (rdata->rx.hdr_len)
2003                 return rdata->rx.hdr_len;
2004
2005         /* First descriptor but not the last descriptor and no split header,
2006          * so the full buffer was used
2007          */
2008         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, LAST))
2009                 return rdata->rx.hdr.dma_len;
2010
2011         /* First descriptor and last descriptor and no split header, so
2012          * calculate how much of the buffer was used
2013          */
2014         return min_t(unsigned int, rdata->rx.hdr.dma_len, rdata->rx.len);
2015 }
2016
2017 static unsigned int xgbe_rx_buf2_len(struct xgbe_ring_data *rdata,
2018                                      struct xgbe_packet_data *packet,
2019                                      unsigned int len)
2020 {
2021         /* Always the full buffer if not the last descriptor */
2022         if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, LAST))
2023                 return rdata->rx.buf.dma_len;
2024
2025         /* Last descriptor so calculate how much of the buffer was used
2026          * for the last bit of data
2027          */
2028         return rdata->rx.len - len;
2029 }
2030
2031 static int xgbe_tx_poll(struct xgbe_channel *channel)
2032 {
2033         struct xgbe_prv_data *pdata = channel->pdata;
2034         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2035         struct xgbe_desc_if *desc_if = &pdata->desc_if;
2036         struct xgbe_ring *ring = channel->tx_ring;
2037         struct xgbe_ring_data *rdata;
2038         struct xgbe_ring_desc *rdesc;
2039         struct net_device *netdev = pdata->netdev;
2040         struct netdev_queue *txq;
2041         int processed = 0;
2042         unsigned int tx_packets = 0, tx_bytes = 0;
2043         unsigned int cur;
2044
2045         DBGPR("-->xgbe_tx_poll\n");
2046
2047         /* Nothing to do if there isn't a Tx ring for this channel */
2048         if (!ring)
2049                 return 0;
2050
2051         cur = ring->cur;
2052
2053         /* Be sure we get ring->cur before accessing descriptor data */
2054         smp_rmb();
2055
2056         txq = netdev_get_tx_queue(netdev, channel->queue_index);
2057
2058         while ((processed < XGBE_TX_DESC_MAX_PROC) &&
2059                (ring->dirty != cur)) {
2060                 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
2061                 rdesc = rdata->rdesc;
2062
2063                 if (!hw_if->tx_complete(rdesc))
2064                         break;
2065
2066                 /* Make sure descriptor fields are read after reading the OWN
2067                  * bit */
2068                 dma_rmb();
2069
2070                 if (netif_msg_tx_done(pdata))
2071                         xgbe_dump_tx_desc(pdata, ring, ring->dirty, 1, 0);
2072
2073                 if (hw_if->is_last_desc(rdesc)) {
2074                         tx_packets += rdata->tx.packets;
2075                         tx_bytes += rdata->tx.bytes;
2076                 }
2077
2078                 /* Free the SKB and reset the descriptor for re-use */
2079                 desc_if->unmap_rdata(pdata, rdata);
2080                 hw_if->tx_desc_reset(rdata);
2081
2082                 processed++;
2083                 ring->dirty++;
2084         }
2085
2086         if (!processed)
2087                 return 0;
2088
2089         netdev_tx_completed_queue(txq, tx_packets, tx_bytes);
2090
2091         if ((ring->tx.queue_stopped == 1) &&
2092             (xgbe_tx_avail_desc(ring) > XGBE_TX_DESC_MIN_FREE)) {
2093                 ring->tx.queue_stopped = 0;
2094                 netif_tx_wake_queue(txq);
2095         }
2096
2097         DBGPR("<--xgbe_tx_poll: processed=%d\n", processed);
2098
2099         return processed;
2100 }
2101
2102 static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
2103 {
2104         struct xgbe_prv_data *pdata = channel->pdata;
2105         struct xgbe_hw_if *hw_if = &pdata->hw_if;
2106         struct xgbe_ring *ring = channel->rx_ring;
2107         struct xgbe_ring_data *rdata;
2108         struct xgbe_packet_data *packet;
2109         struct net_device *netdev = pdata->netdev;
2110         struct napi_struct *napi;
2111         struct sk_buff *skb;
2112         struct skb_shared_hwtstamps *hwtstamps;
2113         unsigned int last, error, context_next, context;
2114         unsigned int len, buf1_len, buf2_len, max_len;
2115         unsigned int received = 0;
2116         int packet_count = 0;
2117
2118         DBGPR("-->xgbe_rx_poll: budget=%d\n", budget);
2119
2120         /* Nothing to do if there isn't a Rx ring for this channel */
2121         if (!ring)
2122                 return 0;
2123
2124         last = 0;
2125         context_next = 0;
2126
2127         napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
2128
2129         rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2130         packet = &ring->packet_data;
2131         while (packet_count < budget) {
2132                 DBGPR("  cur = %d\n", ring->cur);
2133
2134                 /* First time in loop see if we need to restore state */
2135                 if (!received && rdata->state_saved) {
2136                         skb = rdata->state.skb;
2137                         error = rdata->state.error;
2138                         len = rdata->state.len;
2139                 } else {
2140                         memset(packet, 0, sizeof(*packet));
2141                         skb = NULL;
2142                         error = 0;
2143                         len = 0;
2144                 }
2145
2146 read_again:
2147                 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2148
2149                 if (xgbe_rx_dirty_desc(ring) > (XGBE_RX_DESC_CNT >> 3))
2150                         xgbe_rx_refresh(channel);
2151
2152                 if (hw_if->dev_read(channel))
2153                         break;
2154
2155                 received++;
2156                 ring->cur++;
2157
2158                 last = XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES,
2159                                       LAST);
2160                 context_next = XGMAC_GET_BITS(packet->attributes,
2161                                               RX_PACKET_ATTRIBUTES,
2162                                               CONTEXT_NEXT);
2163                 context = XGMAC_GET_BITS(packet->attributes,
2164                                          RX_PACKET_ATTRIBUTES,
2165                                          CONTEXT);
2166
2167                 /* Earlier error, just drain the remaining data */
2168                 if ((!last || context_next) && error)
2169                         goto read_again;
2170
2171                 if (error || packet->errors) {
2172                         if (packet->errors)
2173                                 netif_err(pdata, rx_err, netdev,
2174                                           "error in received packet\n");
2175                         dev_kfree_skb(skb);
2176                         goto next_packet;
2177                 }
2178
2179                 if (!context) {
2180                         /* Get the data length in the descriptor buffers */
2181                         buf1_len = xgbe_rx_buf1_len(rdata, packet);
2182                         len += buf1_len;
2183                         buf2_len = xgbe_rx_buf2_len(rdata, packet, len);
2184                         len += buf2_len;
2185
2186                         if (!skb) {
2187                                 skb = xgbe_create_skb(pdata, napi, rdata,
2188                                                       buf1_len);
2189                                 if (!skb) {
2190                                         error = 1;
2191                                         goto skip_data;
2192                                 }
2193                         }
2194
2195                         if (buf2_len) {
2196                                 dma_sync_single_range_for_cpu(pdata->dev,
2197                                                         rdata->rx.buf.dma_base,
2198                                                         rdata->rx.buf.dma_off,
2199                                                         rdata->rx.buf.dma_len,
2200                                                         DMA_FROM_DEVICE);
2201
2202                                 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
2203                                                 rdata->rx.buf.pa.pages,
2204                                                 rdata->rx.buf.pa.pages_offset,
2205                                                 buf2_len,
2206                                                 rdata->rx.buf.dma_len);
2207                                 rdata->rx.buf.pa.pages = NULL;
2208                         }
2209                 }
2210
2211 skip_data:
2212                 if (!last || context_next)
2213                         goto read_again;
2214
2215                 if (!skb)
2216                         goto next_packet;
2217
2218                 /* Be sure we don't exceed the configured MTU */
2219                 max_len = netdev->mtu + ETH_HLEN;
2220                 if (!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
2221                     (skb->protocol == htons(ETH_P_8021Q)))
2222                         max_len += VLAN_HLEN;
2223
2224                 if (skb->len > max_len) {
2225                         netif_err(pdata, rx_err, netdev,
2226                                   "packet length exceeds configured MTU\n");
2227                         dev_kfree_skb(skb);
2228                         goto next_packet;
2229                 }
2230
2231                 if (netif_msg_pktdata(pdata))
2232                         xgbe_print_pkt(netdev, skb, false);
2233
2234                 skb_checksum_none_assert(skb);
2235                 if (XGMAC_GET_BITS(packet->attributes,
2236                                    RX_PACKET_ATTRIBUTES, CSUM_DONE))
2237                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2238
2239                 if (XGMAC_GET_BITS(packet->attributes,
2240                                    RX_PACKET_ATTRIBUTES, VLAN_CTAG))
2241                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2242                                                packet->vlan_ctag);
2243
2244                 if (XGMAC_GET_BITS(packet->attributes,
2245                                    RX_PACKET_ATTRIBUTES, RX_TSTAMP)) {
2246                         u64 nsec;
2247
2248                         nsec = timecounter_cyc2time(&pdata->tstamp_tc,
2249                                                     packet->rx_tstamp);
2250                         hwtstamps = skb_hwtstamps(skb);
2251                         hwtstamps->hwtstamp = ns_to_ktime(nsec);
2252                 }
2253
2254                 if (XGMAC_GET_BITS(packet->attributes,
2255                                    RX_PACKET_ATTRIBUTES, RSS_HASH))
2256                         skb_set_hash(skb, packet->rss_hash,
2257                                      packet->rss_hash_type);
2258
2259                 skb->dev = netdev;
2260                 skb->protocol = eth_type_trans(skb, netdev);
2261                 skb_record_rx_queue(skb, channel->queue_index);
2262
2263                 napi_gro_receive(napi, skb);
2264
2265 next_packet:
2266                 packet_count++;
2267         }
2268
2269         /* Check if we need to save state before leaving */
2270         if (received && (!last || context_next)) {
2271                 rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
2272                 rdata->state_saved = 1;
2273                 rdata->state.skb = skb;
2274                 rdata->state.len = len;
2275                 rdata->state.error = error;
2276         }
2277
2278         DBGPR("<--xgbe_rx_poll: packet_count = %d\n", packet_count);
2279
2280         return packet_count;
2281 }
2282
2283 static int xgbe_one_poll(struct napi_struct *napi, int budget)
2284 {
2285         struct xgbe_channel *channel = container_of(napi, struct xgbe_channel,
2286                                                     napi);
2287         struct xgbe_prv_data *pdata = channel->pdata;
2288         int processed = 0;
2289
2290         DBGPR("-->xgbe_one_poll: budget=%d\n", budget);
2291
2292         /* Cleanup Tx ring first */
2293         xgbe_tx_poll(channel);
2294
2295         /* Process Rx ring next */
2296         processed = xgbe_rx_poll(channel, budget);
2297
2298         /* If we processed everything, we are done */
2299         if ((processed < budget) && napi_complete_done(napi, processed)) {
2300                 /* Enable Tx and Rx interrupts */
2301                 if (pdata->channel_irq_mode)
2302                         xgbe_enable_rx_tx_int(pdata, channel);
2303                 else
2304                         enable_irq(channel->dma_irq);
2305         }
2306
2307         DBGPR("<--xgbe_one_poll: received = %d\n", processed);
2308
2309         return processed;
2310 }
2311
2312 static int xgbe_all_poll(struct napi_struct *napi, int budget)
2313 {
2314         struct xgbe_prv_data *pdata = container_of(napi, struct xgbe_prv_data,
2315                                                    napi);
2316         struct xgbe_channel *channel;
2317         int ring_budget;
2318         int processed, last_processed;
2319         unsigned int i;
2320
2321         DBGPR("-->xgbe_all_poll: budget=%d\n", budget);
2322
2323         processed = 0;
2324         ring_budget = budget / pdata->rx_ring_count;
2325         do {
2326                 last_processed = processed;
2327
2328                 channel = pdata->channel;
2329                 for (i = 0; i < pdata->channel_count; i++, channel++) {
2330                         /* Cleanup Tx ring first */
2331                         xgbe_tx_poll(channel);
2332
2333                         /* Process Rx ring next */
2334                         if (ring_budget > (budget - processed))
2335                                 ring_budget = budget - processed;
2336                         processed += xgbe_rx_poll(channel, ring_budget);
2337                 }
2338         } while ((processed < budget) && (processed != last_processed));
2339
2340         /* If we processed everything, we are done */
2341         if ((processed < budget) && napi_complete_done(napi, processed)) {
2342                 /* Enable Tx and Rx interrupts */
2343                 xgbe_enable_rx_tx_ints(pdata);
2344         }
2345
2346         DBGPR("<--xgbe_all_poll: received = %d\n", processed);
2347
2348         return processed;
2349 }
2350
2351 void xgbe_dump_tx_desc(struct xgbe_prv_data *pdata, struct xgbe_ring *ring,
2352                        unsigned int idx, unsigned int count, unsigned int flag)
2353 {
2354         struct xgbe_ring_data *rdata;
2355         struct xgbe_ring_desc *rdesc;
2356
2357         while (count--) {
2358                 rdata = XGBE_GET_DESC_DATA(ring, idx);
2359                 rdesc = rdata->rdesc;
2360                 netdev_dbg(pdata->netdev,
2361                            "TX_NORMAL_DESC[%d %s] = %08x:%08x:%08x:%08x\n", idx,
2362                            (flag == 1) ? "QUEUED FOR TX" : "TX BY DEVICE",
2363                            le32_to_cpu(rdesc->desc0),
2364                            le32_to_cpu(rdesc->desc1),
2365                            le32_to_cpu(rdesc->desc2),
2366                            le32_to_cpu(rdesc->desc3));
2367                 idx++;
2368         }
2369 }
2370
2371 void xgbe_dump_rx_desc(struct xgbe_prv_data *pdata, struct xgbe_ring *ring,
2372                        unsigned int idx)
2373 {
2374         struct xgbe_ring_data *rdata;
2375         struct xgbe_ring_desc *rdesc;
2376
2377         rdata = XGBE_GET_DESC_DATA(ring, idx);
2378         rdesc = rdata->rdesc;
2379         netdev_dbg(pdata->netdev,
2380                    "RX_NORMAL_DESC[%d RX BY DEVICE] = %08x:%08x:%08x:%08x\n",
2381                    idx, le32_to_cpu(rdesc->desc0), le32_to_cpu(rdesc->desc1),
2382                    le32_to_cpu(rdesc->desc2), le32_to_cpu(rdesc->desc3));
2383 }
2384
2385 void xgbe_print_pkt(struct net_device *netdev, struct sk_buff *skb, bool tx_rx)
2386 {
2387         struct ethhdr *eth = (struct ethhdr *)skb->data;
2388         unsigned char *buf = skb->data;
2389         unsigned char buffer[128];
2390         unsigned int i, j;
2391
2392         netdev_dbg(netdev, "\n************** SKB dump ****************\n");
2393
2394         netdev_dbg(netdev, "%s packet of %d bytes\n",
2395                    (tx_rx ? "TX" : "RX"), skb->len);
2396
2397         netdev_dbg(netdev, "Dst MAC addr: %pM\n", eth->h_dest);
2398         netdev_dbg(netdev, "Src MAC addr: %pM\n", eth->h_source);
2399         netdev_dbg(netdev, "Protocol: %#06hx\n", ntohs(eth->h_proto));
2400
2401         for (i = 0, j = 0; i < skb->len;) {
2402                 j += snprintf(buffer + j, sizeof(buffer) - j, "%02hhx",
2403                               buf[i++]);
2404
2405                 if ((i % 32) == 0) {
2406                         netdev_dbg(netdev, "  %#06x: %s\n", i - 32, buffer);
2407                         j = 0;
2408                 } else if ((i % 16) == 0) {
2409                         buffer[j++] = ' ';
2410                         buffer[j++] = ' ';
2411                 } else if ((i % 4) == 0) {
2412                         buffer[j++] = ' ';
2413                 }
2414         }
2415         if (i % 32)
2416                 netdev_dbg(netdev, "  %#06x: %s\n", i - (i % 32), buffer);
2417
2418         netdev_dbg(netdev, "\n************** SKB dump ****************\n");
2419 }