1 /* 2 * AMD 10Gb Ethernet driver 3 * 4 * This file is available to you under your choice of the following two 5 * licenses: 6 * 7 * License 1: GPLv2 8 * 9 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc. 10 * 11 * This file is free software; you may copy, redistribute and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation, either version 2 of the License, or (at 14 * your option) any later version. 15 * 16 * This file is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program. If not, see <http://www.gnu.org/licenses/>. 23 * 24 * This file incorporates work covered by the following copyright and 25 * permission notice: 26 * The Synopsys DWC ETHER XGMAC Software Driver and documentation 27 * (hereinafter "Software") is an unsupported proprietary work of Synopsys, 28 * Inc. unless otherwise expressly agreed to in writing between Synopsys 29 * and you. 30 * 31 * The Software IS NOT an item of Licensed Software or Licensed Product 32 * under any End User Software License Agreement or Agreement for Licensed 33 * Product with Synopsys or any supplement thereto. Permission is hereby 34 * granted, free of charge, to any person obtaining a copy of this software 35 * annotated with this license and the Software, to deal in the Software 36 * without restriction, including without limitation the rights to use, 37 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies 38 * of the Software, and to permit persons to whom the Software is furnished 39 * to do so, subject to the following conditions: 40 * 41 * The above copyright notice and this permission notice shall be included 42 * in all copies or substantial portions of the Software. 43 * 44 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" 45 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 46 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 47 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 48 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 54 * THE POSSIBILITY OF SUCH DAMAGE. 55 * 56 * 57 * License 2: Modified BSD 58 * 59 * Copyright (c) 2014-2016 Advanced Micro Devices, Inc. 60 * All rights reserved. 61 * 62 * Redistribution and use in source and binary forms, with or without 63 * modification, are permitted provided that the following conditions are met: 64 * * Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * * Redistributions in binary form must reproduce the above copyright 67 * notice, this list of conditions and the following disclaimer in the 68 * documentation and/or other materials provided with the distribution. 69 * * Neither the name of Advanced Micro Devices, Inc. nor the 70 * names of its contributors may be used to endorse or promote products 71 * derived from this software without specific prior written permission. 72 * 73 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 74 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 76 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY 77 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 78 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 79 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 80 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 81 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 82 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 83 * 84 * This file incorporates work covered by the following copyright and 85 * permission notice: 86 * The Synopsys DWC ETHER XGMAC Software Driver and documentation 87 * (hereinafter "Software") is an unsupported proprietary work of Synopsys, 88 * Inc. unless otherwise expressly agreed to in writing between Synopsys 89 * and you. 90 * 91 * The Software IS NOT an item of Licensed Software or Licensed Product 92 * under any End User Software License Agreement or Agreement for Licensed 93 * Product with Synopsys or any supplement thereto. Permission is hereby 94 * granted, free of charge, to any person obtaining a copy of this software 95 * annotated with this license and the Software, to deal in the Software 96 * without restriction, including without limitation the rights to use, 97 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies 98 * of the Software, and to permit persons to whom the Software is furnished 99 * to do so, subject to the following conditions: 100 * 101 * The above copyright notice and this permission notice shall be included 102 * in all copies or substantial portions of the Software. 103 * 104 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" 105 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 106 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 107 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 108 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 109 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 110 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 111 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 112 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 113 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 114 * THE POSSIBILITY OF SUCH DAMAGE. 115 */ 116 117 #include <linux/module.h> 118 #include <linux/spinlock.h> 119 #include <linux/tcp.h> 120 #include <linux/if_vlan.h> 121 #include <linux/interrupt.h> 122 #include <net/busy_poll.h> 123 #include <linux/clk.h> 124 #include <linux/if_ether.h> 125 #include <linux/net_tstamp.h> 126 #include <linux/phy.h> 127 #include <net/vxlan.h> 128 129 #include "xgbe.h" 130 #include "xgbe-common.h" 131 132 static unsigned int ecc_sec_info_threshold = 10; 133 static unsigned int ecc_sec_warn_threshold = 10000; 134 static unsigned int ecc_sec_period = 600; 135 static unsigned int ecc_ded_threshold = 2; 136 static unsigned int ecc_ded_period = 600; 137 138 #ifdef CONFIG_AMD_XGBE_HAVE_ECC 139 /* Only expose the ECC parameters if supported */ 140 module_param(ecc_sec_info_threshold, uint, 0644); 141 MODULE_PARM_DESC(ecc_sec_info_threshold, 142 " ECC corrected error informational threshold setting"); 143 144 module_param(ecc_sec_warn_threshold, uint, 0644); 145 MODULE_PARM_DESC(ecc_sec_warn_threshold, 146 " ECC corrected error warning threshold setting"); 147 148 module_param(ecc_sec_period, uint, 0644); 149 MODULE_PARM_DESC(ecc_sec_period, " ECC corrected error period (in seconds)"); 150 151 module_param(ecc_ded_threshold, uint, 0644); 152 MODULE_PARM_DESC(ecc_ded_threshold, " ECC detected error threshold setting"); 153 154 module_param(ecc_ded_period, uint, 0644); 155 MODULE_PARM_DESC(ecc_ded_period, " ECC detected error period (in seconds)"); 156 #endif 157 158 static int xgbe_one_poll(struct napi_struct *, int); 159 static int xgbe_all_poll(struct napi_struct *, int); 160 static void xgbe_stop(struct xgbe_prv_data *); 161 162 static void *xgbe_alloc_node(size_t size, int node) 163 { 164 void *mem; 165 166 mem = kzalloc_node(size, GFP_KERNEL, node); 167 if (!mem) 168 mem = kzalloc(size, GFP_KERNEL); 169 170 return mem; 171 } 172 173 static void xgbe_free_channels(struct xgbe_prv_data *pdata) 174 { 175 unsigned int i; 176 177 for (i = 0; i < ARRAY_SIZE(pdata->channel); i++) { 178 if (!pdata->channel[i]) 179 continue; 180 181 kfree(pdata->channel[i]->rx_ring); 182 kfree(pdata->channel[i]->tx_ring); 183 kfree(pdata->channel[i]); 184 185 pdata->channel[i] = NULL; 186 } 187 188 pdata->channel_count = 0; 189 } 190 191 static int xgbe_alloc_channels(struct xgbe_prv_data *pdata) 192 { 193 struct xgbe_channel *channel; 194 struct xgbe_ring *ring; 195 unsigned int count, i; 196 unsigned int cpu; 197 int node; 198 199 count = max_t(unsigned int, pdata->tx_ring_count, pdata->rx_ring_count); 200 for (i = 0; i < count; i++) { 201 /* Attempt to use a CPU on the node the device is on */ 202 cpu = cpumask_local_spread(i, dev_to_node(pdata->dev)); 203 204 /* Set the allocation node based on the returned CPU */ 205 node = cpu_to_node(cpu); 206 207 channel = xgbe_alloc_node(sizeof(*channel), node); 208 if (!channel) 209 goto err_mem; 210 pdata->channel[i] = channel; 211 212 snprintf(channel->name, sizeof(channel->name), "channel-%u", i); 213 channel->pdata = pdata; 214 channel->queue_index = i; 215 channel->dma_regs = pdata->xgmac_regs + DMA_CH_BASE + 216 (DMA_CH_INC * i); 217 channel->node = node; 218 cpumask_set_cpu(cpu, &channel->affinity_mask); 219 220 if (pdata->per_channel_irq) 221 channel->dma_irq = pdata->channel_irq[i]; 222 223 if (i < pdata->tx_ring_count) { 224 ring = xgbe_alloc_node(sizeof(*ring), node); 225 if (!ring) 226 goto err_mem; 227 228 spin_lock_init(&ring->lock); 229 ring->node = node; 230 231 channel->tx_ring = ring; 232 } 233 234 if (i < pdata->rx_ring_count) { 235 ring = xgbe_alloc_node(sizeof(*ring), node); 236 if (!ring) 237 goto err_mem; 238 239 spin_lock_init(&ring->lock); 240 ring->node = node; 241 242 channel->rx_ring = ring; 243 } 244 245 netif_dbg(pdata, drv, pdata->netdev, 246 "%s: cpu=%u, node=%d\n", channel->name, cpu, node); 247 248 netif_dbg(pdata, drv, pdata->netdev, 249 "%s: dma_regs=%p, dma_irq=%d, tx=%p, rx=%p\n", 250 channel->name, channel->dma_regs, channel->dma_irq, 251 channel->tx_ring, channel->rx_ring); 252 } 253 254 pdata->channel_count = count; 255 256 return 0; 257 258 err_mem: 259 xgbe_free_channels(pdata); 260 261 return -ENOMEM; 262 } 263 264 static inline unsigned int xgbe_tx_avail_desc(struct xgbe_ring *ring) 265 { 266 return (ring->rdesc_count - (ring->cur - ring->dirty)); 267 } 268 269 static inline unsigned int xgbe_rx_dirty_desc(struct xgbe_ring *ring) 270 { 271 return (ring->cur - ring->dirty); 272 } 273 274 static int xgbe_maybe_stop_tx_queue(struct xgbe_channel *channel, 275 struct xgbe_ring *ring, unsigned int count) 276 { 277 struct xgbe_prv_data *pdata = channel->pdata; 278 279 if (count > xgbe_tx_avail_desc(ring)) { 280 netif_info(pdata, drv, pdata->netdev, 281 "Tx queue stopped, not enough descriptors available\n"); 282 netif_stop_subqueue(pdata->netdev, channel->queue_index); 283 ring->tx.queue_stopped = 1; 284 285 /* If we haven't notified the hardware because of xmit_more 286 * support, tell it now 287 */ 288 if (ring->tx.xmit_more) 289 pdata->hw_if.tx_start_xmit(channel, ring); 290 291 return NETDEV_TX_BUSY; 292 } 293 294 return 0; 295 } 296 297 static int xgbe_calc_rx_buf_size(struct net_device *netdev, unsigned int mtu) 298 { 299 unsigned int rx_buf_size; 300 301 rx_buf_size = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; 302 rx_buf_size = clamp_val(rx_buf_size, XGBE_RX_MIN_BUF_SIZE, PAGE_SIZE); 303 304 rx_buf_size = (rx_buf_size + XGBE_RX_BUF_ALIGN - 1) & 305 ~(XGBE_RX_BUF_ALIGN - 1); 306 307 return rx_buf_size; 308 } 309 310 static void xgbe_enable_rx_tx_int(struct xgbe_prv_data *pdata, 311 struct xgbe_channel *channel) 312 { 313 struct xgbe_hw_if *hw_if = &pdata->hw_if; 314 enum xgbe_int int_id; 315 316 if (channel->tx_ring && channel->rx_ring) 317 int_id = XGMAC_INT_DMA_CH_SR_TI_RI; 318 else if (channel->tx_ring) 319 int_id = XGMAC_INT_DMA_CH_SR_TI; 320 else if (channel->rx_ring) 321 int_id = XGMAC_INT_DMA_CH_SR_RI; 322 else 323 return; 324 325 hw_if->enable_int(channel, int_id); 326 } 327 328 static void xgbe_enable_rx_tx_ints(struct xgbe_prv_data *pdata) 329 { 330 unsigned int i; 331 332 for (i = 0; i < pdata->channel_count; i++) 333 xgbe_enable_rx_tx_int(pdata, pdata->channel[i]); 334 } 335 336 static void xgbe_disable_rx_tx_int(struct xgbe_prv_data *pdata, 337 struct xgbe_channel *channel) 338 { 339 struct xgbe_hw_if *hw_if = &pdata->hw_if; 340 enum xgbe_int int_id; 341 342 if (channel->tx_ring && channel->rx_ring) 343 int_id = XGMAC_INT_DMA_CH_SR_TI_RI; 344 else if (channel->tx_ring) 345 int_id = XGMAC_INT_DMA_CH_SR_TI; 346 else if (channel->rx_ring) 347 int_id = XGMAC_INT_DMA_CH_SR_RI; 348 else 349 return; 350 351 hw_if->disable_int(channel, int_id); 352 } 353 354 static void xgbe_disable_rx_tx_ints(struct xgbe_prv_data *pdata) 355 { 356 unsigned int i; 357 358 for (i = 0; i < pdata->channel_count; i++) 359 xgbe_disable_rx_tx_int(pdata, pdata->channel[i]); 360 } 361 362 static bool xgbe_ecc_sec(struct xgbe_prv_data *pdata, unsigned long *period, 363 unsigned int *count, const char *area) 364 { 365 if (time_before(jiffies, *period)) { 366 (*count)++; 367 } else { 368 *period = jiffies + (ecc_sec_period * HZ); 369 *count = 1; 370 } 371 372 if (*count > ecc_sec_info_threshold) 373 dev_warn_once(pdata->dev, 374 "%s ECC corrected errors exceed informational threshold\n", 375 area); 376 377 if (*count > ecc_sec_warn_threshold) { 378 dev_warn_once(pdata->dev, 379 "%s ECC corrected errors exceed warning threshold\n", 380 area); 381 return true; 382 } 383 384 return false; 385 } 386 387 static bool xgbe_ecc_ded(struct xgbe_prv_data *pdata, unsigned long *period, 388 unsigned int *count, const char *area) 389 { 390 if (time_before(jiffies, *period)) { 391 (*count)++; 392 } else { 393 *period = jiffies + (ecc_ded_period * HZ); 394 *count = 1; 395 } 396 397 if (*count > ecc_ded_threshold) { 398 netdev_alert(pdata->netdev, 399 "%s ECC detected errors exceed threshold\n", 400 area); 401 return true; 402 } 403 404 return false; 405 } 406 407 static void xgbe_ecc_isr_task(unsigned long data) 408 { 409 struct xgbe_prv_data *pdata = (struct xgbe_prv_data *)data; 410 unsigned int ecc_isr; 411 bool stop = false; 412 413 /* Mask status with only the interrupts we care about */ 414 ecc_isr = XP_IOREAD(pdata, XP_ECC_ISR); 415 ecc_isr &= XP_IOREAD(pdata, XP_ECC_IER); 416 netif_dbg(pdata, intr, pdata->netdev, "ECC_ISR=%#010x\n", ecc_isr); 417 418 if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, TX_DED)) { 419 stop |= xgbe_ecc_ded(pdata, &pdata->tx_ded_period, 420 &pdata->tx_ded_count, "TX fifo"); 421 } 422 423 if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, RX_DED)) { 424 stop |= xgbe_ecc_ded(pdata, &pdata->rx_ded_period, 425 &pdata->rx_ded_count, "RX fifo"); 426 } 427 428 if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, DESC_DED)) { 429 stop |= xgbe_ecc_ded(pdata, &pdata->desc_ded_period, 430 &pdata->desc_ded_count, 431 "descriptor cache"); 432 } 433 434 if (stop) { 435 pdata->hw_if.disable_ecc_ded(pdata); 436 schedule_work(&pdata->stopdev_work); 437 goto out; 438 } 439 440 if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, TX_SEC)) { 441 if (xgbe_ecc_sec(pdata, &pdata->tx_sec_period, 442 &pdata->tx_sec_count, "TX fifo")) 443 pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_TX); 444 } 445 446 if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, RX_SEC)) 447 if (xgbe_ecc_sec(pdata, &pdata->rx_sec_period, 448 &pdata->rx_sec_count, "RX fifo")) 449 pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_RX); 450 451 if (XP_GET_BITS(ecc_isr, XP_ECC_ISR, DESC_SEC)) 452 if (xgbe_ecc_sec(pdata, &pdata->desc_sec_period, 453 &pdata->desc_sec_count, "descriptor cache")) 454 pdata->hw_if.disable_ecc_sec(pdata, XGBE_ECC_SEC_DESC); 455 456 out: 457 /* Clear all ECC interrupts */ 458 XP_IOWRITE(pdata, XP_ECC_ISR, ecc_isr); 459 460 /* Reissue interrupt if status is not clear */ 461 if (pdata->vdata->irq_reissue_support) 462 XP_IOWRITE(pdata, XP_INT_REISSUE_EN, 1 << 1); 463 } 464 465 static irqreturn_t xgbe_ecc_isr(int irq, void *data) 466 { 467 struct xgbe_prv_data *pdata = data; 468 469 if (pdata->isr_as_tasklet) 470 tasklet_schedule(&pdata->tasklet_ecc); 471 else 472 xgbe_ecc_isr_task((unsigned long)pdata); 473 474 return IRQ_HANDLED; 475 } 476 477 static void xgbe_isr_task(unsigned long data) 478 { 479 struct xgbe_prv_data *pdata = (struct xgbe_prv_data *)data; 480 struct xgbe_hw_if *hw_if = &pdata->hw_if; 481 struct xgbe_channel *channel; 482 unsigned int dma_isr, dma_ch_isr; 483 unsigned int mac_isr, mac_tssr, mac_mdioisr; 484 unsigned int i; 485 486 /* The DMA interrupt status register also reports MAC and MTL 487 * interrupts. So for polling mode, we just need to check for 488 * this register to be non-zero 489 */ 490 dma_isr = XGMAC_IOREAD(pdata, DMA_ISR); 491 if (!dma_isr) 492 goto isr_done; 493 494 netif_dbg(pdata, intr, pdata->netdev, "DMA_ISR=%#010x\n", dma_isr); 495 496 for (i = 0; i < pdata->channel_count; i++) { 497 if (!(dma_isr & (1 << i))) 498 continue; 499 500 channel = pdata->channel[i]; 501 502 dma_ch_isr = XGMAC_DMA_IOREAD(channel, DMA_CH_SR); 503 netif_dbg(pdata, intr, pdata->netdev, "DMA_CH%u_ISR=%#010x\n", 504 i, dma_ch_isr); 505 506 /* The TI or RI interrupt bits may still be set even if using 507 * per channel DMA interrupts. Check to be sure those are not 508 * enabled before using the private data napi structure. 509 */ 510 if (!pdata->per_channel_irq && 511 (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, TI) || 512 XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RI))) { 513 if (napi_schedule_prep(&pdata->napi)) { 514 /* Disable Tx and Rx interrupts */ 515 xgbe_disable_rx_tx_ints(pdata); 516 517 /* Turn on polling */ 518 __napi_schedule_irqoff(&pdata->napi); 519 } 520 } else { 521 /* Don't clear Rx/Tx status if doing per channel DMA 522 * interrupts, these will be cleared by the ISR for 523 * per channel DMA interrupts. 524 */ 525 XGMAC_SET_BITS(dma_ch_isr, DMA_CH_SR, TI, 0); 526 XGMAC_SET_BITS(dma_ch_isr, DMA_CH_SR, RI, 0); 527 } 528 529 if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RBU)) 530 pdata->ext_stats.rx_buffer_unavailable++; 531 532 /* Restart the device on a Fatal Bus Error */ 533 if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, FBE)) 534 schedule_work(&pdata->restart_work); 535 536 /* Clear interrupt signals */ 537 XGMAC_DMA_IOWRITE(channel, DMA_CH_SR, dma_ch_isr); 538 } 539 540 if (XGMAC_GET_BITS(dma_isr, DMA_ISR, MACIS)) { 541 mac_isr = XGMAC_IOREAD(pdata, MAC_ISR); 542 543 netif_dbg(pdata, intr, pdata->netdev, "MAC_ISR=%#010x\n", 544 mac_isr); 545 546 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCTXIS)) 547 hw_if->tx_mmc_int(pdata); 548 549 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, MMCRXIS)) 550 hw_if->rx_mmc_int(pdata); 551 552 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, TSIS)) { 553 mac_tssr = XGMAC_IOREAD(pdata, MAC_TSSR); 554 555 netif_dbg(pdata, intr, pdata->netdev, 556 "MAC_TSSR=%#010x\n", mac_tssr); 557 558 if (XGMAC_GET_BITS(mac_tssr, MAC_TSSR, TXTSC)) { 559 /* Read Tx Timestamp to clear interrupt */ 560 pdata->tx_tstamp = 561 hw_if->get_tx_tstamp(pdata); 562 queue_work(pdata->dev_workqueue, 563 &pdata->tx_tstamp_work); 564 } 565 } 566 567 if (XGMAC_GET_BITS(mac_isr, MAC_ISR, SMI)) { 568 mac_mdioisr = XGMAC_IOREAD(pdata, MAC_MDIOISR); 569 570 netif_dbg(pdata, intr, pdata->netdev, 571 "MAC_MDIOISR=%#010x\n", mac_mdioisr); 572 573 if (XGMAC_GET_BITS(mac_mdioisr, MAC_MDIOISR, 574 SNGLCOMPINT)) 575 complete(&pdata->mdio_complete); 576 } 577 } 578 579 isr_done: 580 /* If there is not a separate AN irq, handle it here */ 581 if (pdata->dev_irq == pdata->an_irq) 582 pdata->phy_if.an_isr(pdata); 583 584 /* If there is not a separate ECC irq, handle it here */ 585 if (pdata->vdata->ecc_support && (pdata->dev_irq == pdata->ecc_irq)) 586 xgbe_ecc_isr_task((unsigned long)pdata); 587 588 /* If there is not a separate I2C irq, handle it here */ 589 if (pdata->vdata->i2c_support && (pdata->dev_irq == pdata->i2c_irq)) 590 pdata->i2c_if.i2c_isr(pdata); 591 592 /* Reissue interrupt if status is not clear */ 593 if (pdata->vdata->irq_reissue_support) { 594 unsigned int reissue_mask; 595 596 reissue_mask = 1 << 0; 597 if (!pdata->per_channel_irq) 598 reissue_mask |= 0xffff << 4; 599 600 XP_IOWRITE(pdata, XP_INT_REISSUE_EN, reissue_mask); 601 } 602 } 603 604 static irqreturn_t xgbe_isr(int irq, void *data) 605 { 606 struct xgbe_prv_data *pdata = data; 607 608 if (pdata->isr_as_tasklet) 609 tasklet_schedule(&pdata->tasklet_dev); 610 else 611 xgbe_isr_task((unsigned long)pdata); 612 613 return IRQ_HANDLED; 614 } 615 616 static irqreturn_t xgbe_dma_isr(int irq, void *data) 617 { 618 struct xgbe_channel *channel = data; 619 struct xgbe_prv_data *pdata = channel->pdata; 620 unsigned int dma_status; 621 622 /* Per channel DMA interrupts are enabled, so we use the per 623 * channel napi structure and not the private data napi structure 624 */ 625 if (napi_schedule_prep(&channel->napi)) { 626 /* Disable Tx and Rx interrupts */ 627 if (pdata->channel_irq_mode) 628 xgbe_disable_rx_tx_int(pdata, channel); 629 else 630 disable_irq_nosync(channel->dma_irq); 631 632 /* Turn on polling */ 633 __napi_schedule_irqoff(&channel->napi); 634 } 635 636 /* Clear Tx/Rx signals */ 637 dma_status = 0; 638 XGMAC_SET_BITS(dma_status, DMA_CH_SR, TI, 1); 639 XGMAC_SET_BITS(dma_status, DMA_CH_SR, RI, 1); 640 XGMAC_DMA_IOWRITE(channel, DMA_CH_SR, dma_status); 641 642 return IRQ_HANDLED; 643 } 644 645 static void xgbe_tx_timer(struct timer_list *t) 646 { 647 struct xgbe_channel *channel = from_timer(channel, t, tx_timer); 648 struct xgbe_prv_data *pdata = channel->pdata; 649 struct napi_struct *napi; 650 651 DBGPR("-->xgbe_tx_timer\n"); 652 653 napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi; 654 655 if (napi_schedule_prep(napi)) { 656 /* Disable Tx and Rx interrupts */ 657 if (pdata->per_channel_irq) 658 if (pdata->channel_irq_mode) 659 xgbe_disable_rx_tx_int(pdata, channel); 660 else 661 disable_irq_nosync(channel->dma_irq); 662 else 663 xgbe_disable_rx_tx_ints(pdata); 664 665 /* Turn on polling */ 666 __napi_schedule(napi); 667 } 668 669 channel->tx_timer_active = 0; 670 671 DBGPR("<--xgbe_tx_timer\n"); 672 } 673 674 static void xgbe_service(struct work_struct *work) 675 { 676 struct xgbe_prv_data *pdata = container_of(work, 677 struct xgbe_prv_data, 678 service_work); 679 680 pdata->phy_if.phy_status(pdata); 681 } 682 683 static void xgbe_service_timer(struct timer_list *t) 684 { 685 struct xgbe_prv_data *pdata = from_timer(pdata, t, service_timer); 686 687 queue_work(pdata->dev_workqueue, &pdata->service_work); 688 689 mod_timer(&pdata->service_timer, jiffies + HZ); 690 } 691 692 static void xgbe_init_timers(struct xgbe_prv_data *pdata) 693 { 694 struct xgbe_channel *channel; 695 unsigned int i; 696 697 timer_setup(&pdata->service_timer, xgbe_service_timer, 0); 698 699 for (i = 0; i < pdata->channel_count; i++) { 700 channel = pdata->channel[i]; 701 if (!channel->tx_ring) 702 break; 703 704 timer_setup(&channel->tx_timer, xgbe_tx_timer, 0); 705 } 706 } 707 708 static void xgbe_start_timers(struct xgbe_prv_data *pdata) 709 { 710 mod_timer(&pdata->service_timer, jiffies + HZ); 711 } 712 713 static void xgbe_stop_timers(struct xgbe_prv_data *pdata) 714 { 715 struct xgbe_channel *channel; 716 unsigned int i; 717 718 del_timer_sync(&pdata->service_timer); 719 720 for (i = 0; i < pdata->channel_count; i++) { 721 channel = pdata->channel[i]; 722 if (!channel->tx_ring) 723 break; 724 725 del_timer_sync(&channel->tx_timer); 726 } 727 } 728 729 void xgbe_get_all_hw_features(struct xgbe_prv_data *pdata) 730 { 731 unsigned int mac_hfr0, mac_hfr1, mac_hfr2; 732 struct xgbe_hw_features *hw_feat = &pdata->hw_feat; 733 734 mac_hfr0 = XGMAC_IOREAD(pdata, MAC_HWF0R); 735 mac_hfr1 = XGMAC_IOREAD(pdata, MAC_HWF1R); 736 mac_hfr2 = XGMAC_IOREAD(pdata, MAC_HWF2R); 737 738 memset(hw_feat, 0, sizeof(*hw_feat)); 739 740 hw_feat->version = XGMAC_IOREAD(pdata, MAC_VR); 741 742 /* Hardware feature register 0 */ 743 hw_feat->gmii = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, GMIISEL); 744 hw_feat->vlhash = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, VLHASH); 745 hw_feat->sma = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, SMASEL); 746 hw_feat->rwk = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, RWKSEL); 747 hw_feat->mgk = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, MGKSEL); 748 hw_feat->mmc = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, MMCSEL); 749 hw_feat->aoe = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, ARPOFFSEL); 750 hw_feat->ts = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TSSEL); 751 hw_feat->eee = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, EEESEL); 752 hw_feat->tx_coe = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TXCOESEL); 753 hw_feat->rx_coe = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, RXCOESEL); 754 hw_feat->addn_mac = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, 755 ADDMACADRSEL); 756 hw_feat->ts_src = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, TSSTSSEL); 757 hw_feat->sa_vlan_ins = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, SAVLANINS); 758 hw_feat->vxn = XGMAC_GET_BITS(mac_hfr0, MAC_HWF0R, VXN); 759 760 /* Hardware feature register 1 */ 761 hw_feat->rx_fifo_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, 762 RXFIFOSIZE); 763 hw_feat->tx_fifo_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, 764 TXFIFOSIZE); 765 hw_feat->adv_ts_hi = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, ADVTHWORD); 766 hw_feat->dma_width = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, ADDR64); 767 hw_feat->dcb = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DCBEN); 768 hw_feat->sph = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, SPHEN); 769 hw_feat->tso = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, TSOEN); 770 hw_feat->dma_debug = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, DBGMEMA); 771 hw_feat->rss = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, RSSEN); 772 hw_feat->tc_cnt = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, NUMTC); 773 hw_feat->hash_table_size = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, 774 HASHTBLSZ); 775 hw_feat->l3l4_filter_num = XGMAC_GET_BITS(mac_hfr1, MAC_HWF1R, 776 L3L4FNUM); 777 778 /* Hardware feature register 2 */ 779 hw_feat->rx_q_cnt = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, RXQCNT); 780 hw_feat->tx_q_cnt = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, TXQCNT); 781 hw_feat->rx_ch_cnt = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, RXCHCNT); 782 hw_feat->tx_ch_cnt = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, TXCHCNT); 783 hw_feat->pps_out_num = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, PPSOUTNUM); 784 hw_feat->aux_snap_num = XGMAC_GET_BITS(mac_hfr2, MAC_HWF2R, AUXSNAPNUM); 785 786 /* Translate the Hash Table size into actual number */ 787 switch (hw_feat->hash_table_size) { 788 case 0: 789 break; 790 case 1: 791 hw_feat->hash_table_size = 64; 792 break; 793 case 2: 794 hw_feat->hash_table_size = 128; 795 break; 796 case 3: 797 hw_feat->hash_table_size = 256; 798 break; 799 } 800 801 /* Translate the address width setting into actual number */ 802 switch (hw_feat->dma_width) { 803 case 0: 804 hw_feat->dma_width = 32; 805 break; 806 case 1: 807 hw_feat->dma_width = 40; 808 break; 809 case 2: 810 hw_feat->dma_width = 48; 811 break; 812 default: 813 hw_feat->dma_width = 32; 814 } 815 816 /* The Queue, Channel and TC counts are zero based so increment them 817 * to get the actual number 818 */ 819 hw_feat->rx_q_cnt++; 820 hw_feat->tx_q_cnt++; 821 hw_feat->rx_ch_cnt++; 822 hw_feat->tx_ch_cnt++; 823 hw_feat->tc_cnt++; 824 825 /* Translate the fifo sizes into actual numbers */ 826 hw_feat->rx_fifo_size = 1 << (hw_feat->rx_fifo_size + 7); 827 hw_feat->tx_fifo_size = 1 << (hw_feat->tx_fifo_size + 7); 828 829 if (netif_msg_probe(pdata)) { 830 dev_dbg(pdata->dev, "Hardware features:\n"); 831 832 /* Hardware feature register 0 */ 833 dev_dbg(pdata->dev, " 1GbE support : %s\n", 834 hw_feat->gmii ? "yes" : "no"); 835 dev_dbg(pdata->dev, " VLAN hash filter : %s\n", 836 hw_feat->vlhash ? "yes" : "no"); 837 dev_dbg(pdata->dev, " MDIO interface : %s\n", 838 hw_feat->sma ? "yes" : "no"); 839 dev_dbg(pdata->dev, " Wake-up packet support : %s\n", 840 hw_feat->rwk ? "yes" : "no"); 841 dev_dbg(pdata->dev, " Magic packet support : %s\n", 842 hw_feat->mgk ? "yes" : "no"); 843 dev_dbg(pdata->dev, " Management counters : %s\n", 844 hw_feat->mmc ? "yes" : "no"); 845 dev_dbg(pdata->dev, " ARP offload : %s\n", 846 hw_feat->aoe ? "yes" : "no"); 847 dev_dbg(pdata->dev, " IEEE 1588-2008 Timestamp : %s\n", 848 hw_feat->ts ? "yes" : "no"); 849 dev_dbg(pdata->dev, " Energy Efficient Ethernet : %s\n", 850 hw_feat->eee ? "yes" : "no"); 851 dev_dbg(pdata->dev, " TX checksum offload : %s\n", 852 hw_feat->tx_coe ? "yes" : "no"); 853 dev_dbg(pdata->dev, " RX checksum offload : %s\n", 854 hw_feat->rx_coe ? "yes" : "no"); 855 dev_dbg(pdata->dev, " Additional MAC addresses : %u\n", 856 hw_feat->addn_mac); 857 dev_dbg(pdata->dev, " Timestamp source : %s\n", 858 (hw_feat->ts_src == 1) ? "internal" : 859 (hw_feat->ts_src == 2) ? "external" : 860 (hw_feat->ts_src == 3) ? "internal/external" : "n/a"); 861 dev_dbg(pdata->dev, " SA/VLAN insertion : %s\n", 862 hw_feat->sa_vlan_ins ? "yes" : "no"); 863 dev_dbg(pdata->dev, " VXLAN/NVGRE support : %s\n", 864 hw_feat->vxn ? "yes" : "no"); 865 866 /* Hardware feature register 1 */ 867 dev_dbg(pdata->dev, " RX fifo size : %u\n", 868 hw_feat->rx_fifo_size); 869 dev_dbg(pdata->dev, " TX fifo size : %u\n", 870 hw_feat->tx_fifo_size); 871 dev_dbg(pdata->dev, " IEEE 1588 high word : %s\n", 872 hw_feat->adv_ts_hi ? "yes" : "no"); 873 dev_dbg(pdata->dev, " DMA width : %u\n", 874 hw_feat->dma_width); 875 dev_dbg(pdata->dev, " Data Center Bridging : %s\n", 876 hw_feat->dcb ? "yes" : "no"); 877 dev_dbg(pdata->dev, " Split header : %s\n", 878 hw_feat->sph ? "yes" : "no"); 879 dev_dbg(pdata->dev, " TCP Segmentation Offload : %s\n", 880 hw_feat->tso ? "yes" : "no"); 881 dev_dbg(pdata->dev, " Debug memory interface : %s\n", 882 hw_feat->dma_debug ? "yes" : "no"); 883 dev_dbg(pdata->dev, " Receive Side Scaling : %s\n", 884 hw_feat->rss ? "yes" : "no"); 885 dev_dbg(pdata->dev, " Traffic Class count : %u\n", 886 hw_feat->tc_cnt); 887 dev_dbg(pdata->dev, " Hash table size : %u\n", 888 hw_feat->hash_table_size); 889 dev_dbg(pdata->dev, " L3/L4 Filters : %u\n", 890 hw_feat->l3l4_filter_num); 891 892 /* Hardware feature register 2 */ 893 dev_dbg(pdata->dev, " RX queue count : %u\n", 894 hw_feat->rx_q_cnt); 895 dev_dbg(pdata->dev, " TX queue count : %u\n", 896 hw_feat->tx_q_cnt); 897 dev_dbg(pdata->dev, " RX DMA channel count : %u\n", 898 hw_feat->rx_ch_cnt); 899 dev_dbg(pdata->dev, " TX DMA channel count : %u\n", 900 hw_feat->rx_ch_cnt); 901 dev_dbg(pdata->dev, " PPS outputs : %u\n", 902 hw_feat->pps_out_num); 903 dev_dbg(pdata->dev, " Auxiliary snapshot inputs : %u\n", 904 hw_feat->aux_snap_num); 905 } 906 } 907 908 static void xgbe_disable_vxlan_offloads(struct xgbe_prv_data *pdata) 909 { 910 struct net_device *netdev = pdata->netdev; 911 912 if (!pdata->vxlan_offloads_set) 913 return; 914 915 netdev_info(netdev, "disabling VXLAN offloads\n"); 916 917 netdev->hw_enc_features &= ~(NETIF_F_SG | 918 NETIF_F_IP_CSUM | 919 NETIF_F_IPV6_CSUM | 920 NETIF_F_RXCSUM | 921 NETIF_F_TSO | 922 NETIF_F_TSO6 | 923 NETIF_F_GRO | 924 NETIF_F_GSO_UDP_TUNNEL | 925 NETIF_F_GSO_UDP_TUNNEL_CSUM); 926 927 netdev->features &= ~(NETIF_F_GSO_UDP_TUNNEL | 928 NETIF_F_GSO_UDP_TUNNEL_CSUM); 929 930 pdata->vxlan_offloads_set = 0; 931 } 932 933 static void xgbe_disable_vxlan_hw(struct xgbe_prv_data *pdata) 934 { 935 if (!pdata->vxlan_port_set) 936 return; 937 938 pdata->hw_if.disable_vxlan(pdata); 939 940 pdata->vxlan_port_set = 0; 941 pdata->vxlan_port = 0; 942 } 943 944 static void xgbe_disable_vxlan_accel(struct xgbe_prv_data *pdata) 945 { 946 xgbe_disable_vxlan_offloads(pdata); 947 948 xgbe_disable_vxlan_hw(pdata); 949 } 950 951 static void xgbe_enable_vxlan_offloads(struct xgbe_prv_data *pdata) 952 { 953 struct net_device *netdev = pdata->netdev; 954 955 if (pdata->vxlan_offloads_set) 956 return; 957 958 netdev_info(netdev, "enabling VXLAN offloads\n"); 959 960 netdev->hw_enc_features |= NETIF_F_SG | 961 NETIF_F_IP_CSUM | 962 NETIF_F_IPV6_CSUM | 963 NETIF_F_RXCSUM | 964 NETIF_F_TSO | 965 NETIF_F_TSO6 | 966 NETIF_F_GRO | 967 pdata->vxlan_features; 968 969 netdev->features |= pdata->vxlan_features; 970 971 pdata->vxlan_offloads_set = 1; 972 } 973 974 static void xgbe_enable_vxlan_hw(struct xgbe_prv_data *pdata) 975 { 976 struct xgbe_vxlan_data *vdata; 977 978 if (pdata->vxlan_port_set) 979 return; 980 981 if (list_empty(&pdata->vxlan_ports)) 982 return; 983 984 vdata = list_first_entry(&pdata->vxlan_ports, 985 struct xgbe_vxlan_data, list); 986 987 pdata->vxlan_port_set = 1; 988 pdata->vxlan_port = be16_to_cpu(vdata->port); 989 990 pdata->hw_if.enable_vxlan(pdata); 991 } 992 993 static void xgbe_enable_vxlan_accel(struct xgbe_prv_data *pdata) 994 { 995 /* VXLAN acceleration desired? */ 996 if (!pdata->vxlan_features) 997 return; 998 999 /* VXLAN acceleration possible? */ 1000 if (pdata->vxlan_force_disable) 1001 return; 1002 1003 xgbe_enable_vxlan_hw(pdata); 1004 1005 xgbe_enable_vxlan_offloads(pdata); 1006 } 1007 1008 static void xgbe_reset_vxlan_accel(struct xgbe_prv_data *pdata) 1009 { 1010 xgbe_disable_vxlan_hw(pdata); 1011 1012 if (pdata->vxlan_features) 1013 xgbe_enable_vxlan_offloads(pdata); 1014 1015 pdata->vxlan_force_disable = 0; 1016 } 1017 1018 static void xgbe_napi_enable(struct xgbe_prv_data *pdata, unsigned int add) 1019 { 1020 struct xgbe_channel *channel; 1021 unsigned int i; 1022 1023 if (pdata->per_channel_irq) { 1024 for (i = 0; i < pdata->channel_count; i++) { 1025 channel = pdata->channel[i]; 1026 if (add) 1027 netif_napi_add(pdata->netdev, &channel->napi, 1028 xgbe_one_poll, NAPI_POLL_WEIGHT); 1029 1030 napi_enable(&channel->napi); 1031 } 1032 } else { 1033 if (add) 1034 netif_napi_add(pdata->netdev, &pdata->napi, 1035 xgbe_all_poll, NAPI_POLL_WEIGHT); 1036 1037 napi_enable(&pdata->napi); 1038 } 1039 } 1040 1041 static void xgbe_napi_disable(struct xgbe_prv_data *pdata, unsigned int del) 1042 { 1043 struct xgbe_channel *channel; 1044 unsigned int i; 1045 1046 if (pdata->per_channel_irq) { 1047 for (i = 0; i < pdata->channel_count; i++) { 1048 channel = pdata->channel[i]; 1049 napi_disable(&channel->napi); 1050 1051 if (del) 1052 netif_napi_del(&channel->napi); 1053 } 1054 } else { 1055 napi_disable(&pdata->napi); 1056 1057 if (del) 1058 netif_napi_del(&pdata->napi); 1059 } 1060 } 1061 1062 static int xgbe_request_irqs(struct xgbe_prv_data *pdata) 1063 { 1064 struct xgbe_channel *channel; 1065 struct net_device *netdev = pdata->netdev; 1066 unsigned int i; 1067 int ret; 1068 1069 tasklet_init(&pdata->tasklet_dev, xgbe_isr_task, (unsigned long)pdata); 1070 tasklet_init(&pdata->tasklet_ecc, xgbe_ecc_isr_task, 1071 (unsigned long)pdata); 1072 1073 ret = devm_request_irq(pdata->dev, pdata->dev_irq, xgbe_isr, 0, 1074 netdev_name(netdev), pdata); 1075 if (ret) { 1076 netdev_alert(netdev, "error requesting irq %d\n", 1077 pdata->dev_irq); 1078 return ret; 1079 } 1080 1081 if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq)) { 1082 ret = devm_request_irq(pdata->dev, pdata->ecc_irq, xgbe_ecc_isr, 1083 0, pdata->ecc_name, pdata); 1084 if (ret) { 1085 netdev_alert(netdev, "error requesting ecc irq %d\n", 1086 pdata->ecc_irq); 1087 goto err_dev_irq; 1088 } 1089 } 1090 1091 if (!pdata->per_channel_irq) 1092 return 0; 1093 1094 for (i = 0; i < pdata->channel_count; i++) { 1095 channel = pdata->channel[i]; 1096 snprintf(channel->dma_irq_name, 1097 sizeof(channel->dma_irq_name) - 1, 1098 "%s-TxRx-%u", netdev_name(netdev), 1099 channel->queue_index); 1100 1101 ret = devm_request_irq(pdata->dev, channel->dma_irq, 1102 xgbe_dma_isr, 0, 1103 channel->dma_irq_name, channel); 1104 if (ret) { 1105 netdev_alert(netdev, "error requesting irq %d\n", 1106 channel->dma_irq); 1107 goto err_dma_irq; 1108 } 1109 1110 irq_set_affinity_hint(channel->dma_irq, 1111 &channel->affinity_mask); 1112 } 1113 1114 return 0; 1115 1116 err_dma_irq: 1117 /* Using an unsigned int, 'i' will go to UINT_MAX and exit */ 1118 for (i--; i < pdata->channel_count; i--) { 1119 channel = pdata->channel[i]; 1120 1121 irq_set_affinity_hint(channel->dma_irq, NULL); 1122 devm_free_irq(pdata->dev, channel->dma_irq, channel); 1123 } 1124 1125 if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq)) 1126 devm_free_irq(pdata->dev, pdata->ecc_irq, pdata); 1127 1128 err_dev_irq: 1129 devm_free_irq(pdata->dev, pdata->dev_irq, pdata); 1130 1131 return ret; 1132 } 1133 1134 static void xgbe_free_irqs(struct xgbe_prv_data *pdata) 1135 { 1136 struct xgbe_channel *channel; 1137 unsigned int i; 1138 1139 devm_free_irq(pdata->dev, pdata->dev_irq, pdata); 1140 1141 if (pdata->vdata->ecc_support && (pdata->dev_irq != pdata->ecc_irq)) 1142 devm_free_irq(pdata->dev, pdata->ecc_irq, pdata); 1143 1144 if (!pdata->per_channel_irq) 1145 return; 1146 1147 for (i = 0; i < pdata->channel_count; i++) { 1148 channel = pdata->channel[i]; 1149 1150 irq_set_affinity_hint(channel->dma_irq, NULL); 1151 devm_free_irq(pdata->dev, channel->dma_irq, channel); 1152 } 1153 } 1154 1155 void xgbe_init_tx_coalesce(struct xgbe_prv_data *pdata) 1156 { 1157 struct xgbe_hw_if *hw_if = &pdata->hw_if; 1158 1159 DBGPR("-->xgbe_init_tx_coalesce\n"); 1160 1161 pdata->tx_usecs = XGMAC_INIT_DMA_TX_USECS; 1162 pdata->tx_frames = XGMAC_INIT_DMA_TX_FRAMES; 1163 1164 hw_if->config_tx_coalesce(pdata); 1165 1166 DBGPR("<--xgbe_init_tx_coalesce\n"); 1167 } 1168 1169 void xgbe_init_rx_coalesce(struct xgbe_prv_data *pdata) 1170 { 1171 struct xgbe_hw_if *hw_if = &pdata->hw_if; 1172 1173 DBGPR("-->xgbe_init_rx_coalesce\n"); 1174 1175 pdata->rx_riwt = hw_if->usec_to_riwt(pdata, XGMAC_INIT_DMA_RX_USECS); 1176 pdata->rx_usecs = XGMAC_INIT_DMA_RX_USECS; 1177 pdata->rx_frames = XGMAC_INIT_DMA_RX_FRAMES; 1178 1179 hw_if->config_rx_coalesce(pdata); 1180 1181 DBGPR("<--xgbe_init_rx_coalesce\n"); 1182 } 1183 1184 static void xgbe_free_tx_data(struct xgbe_prv_data *pdata) 1185 { 1186 struct xgbe_desc_if *desc_if = &pdata->desc_if; 1187 struct xgbe_ring *ring; 1188 struct xgbe_ring_data *rdata; 1189 unsigned int i, j; 1190 1191 DBGPR("-->xgbe_free_tx_data\n"); 1192 1193 for (i = 0; i < pdata->channel_count; i++) { 1194 ring = pdata->channel[i]->tx_ring; 1195 if (!ring) 1196 break; 1197 1198 for (j = 0; j < ring->rdesc_count; j++) { 1199 rdata = XGBE_GET_DESC_DATA(ring, j); 1200 desc_if->unmap_rdata(pdata, rdata); 1201 } 1202 } 1203 1204 DBGPR("<--xgbe_free_tx_data\n"); 1205 } 1206 1207 static void xgbe_free_rx_data(struct xgbe_prv_data *pdata) 1208 { 1209 struct xgbe_desc_if *desc_if = &pdata->desc_if; 1210 struct xgbe_ring *ring; 1211 struct xgbe_ring_data *rdata; 1212 unsigned int i, j; 1213 1214 DBGPR("-->xgbe_free_rx_data\n"); 1215 1216 for (i = 0; i < pdata->channel_count; i++) { 1217 ring = pdata->channel[i]->rx_ring; 1218 if (!ring) 1219 break; 1220 1221 for (j = 0; j < ring->rdesc_count; j++) { 1222 rdata = XGBE_GET_DESC_DATA(ring, j); 1223 desc_if->unmap_rdata(pdata, rdata); 1224 } 1225 } 1226 1227 DBGPR("<--xgbe_free_rx_data\n"); 1228 } 1229 1230 static int xgbe_phy_reset(struct xgbe_prv_data *pdata) 1231 { 1232 pdata->phy_link = -1; 1233 pdata->phy_speed = SPEED_UNKNOWN; 1234 1235 return pdata->phy_if.phy_reset(pdata); 1236 } 1237 1238 int xgbe_powerdown(struct net_device *netdev, unsigned int caller) 1239 { 1240 struct xgbe_prv_data *pdata = netdev_priv(netdev); 1241 struct xgbe_hw_if *hw_if = &pdata->hw_if; 1242 unsigned long flags; 1243 1244 DBGPR("-->xgbe_powerdown\n"); 1245 1246 if (!netif_running(netdev) || 1247 (caller == XGMAC_IOCTL_CONTEXT && pdata->power_down)) { 1248 netdev_alert(netdev, "Device is already powered down\n"); 1249 DBGPR("<--xgbe_powerdown\n"); 1250 return -EINVAL; 1251 } 1252 1253 spin_lock_irqsave(&pdata->lock, flags); 1254 1255 if (caller == XGMAC_DRIVER_CONTEXT) 1256 netif_device_detach(netdev); 1257 1258 netif_tx_stop_all_queues(netdev); 1259 1260 xgbe_stop_timers(pdata); 1261 flush_workqueue(pdata->dev_workqueue); 1262 1263 hw_if->powerdown_tx(pdata); 1264 hw_if->powerdown_rx(pdata); 1265 1266 xgbe_napi_disable(pdata, 0); 1267 1268 pdata->power_down = 1; 1269 1270 spin_unlock_irqrestore(&pdata->lock, flags); 1271 1272 DBGPR("<--xgbe_powerdown\n"); 1273 1274 return 0; 1275 } 1276 1277 int xgbe_powerup(struct net_device *netdev, unsigned int caller) 1278 { 1279 struct xgbe_prv_data *pdata = netdev_priv(netdev); 1280 struct xgbe_hw_if *hw_if = &pdata->hw_if; 1281 unsigned long flags; 1282 1283 DBGPR("-->xgbe_powerup\n"); 1284 1285 if (!netif_running(netdev) || 1286 (caller == XGMAC_IOCTL_CONTEXT && !pdata->power_down)) { 1287 netdev_alert(netdev, "Device is already powered up\n"); 1288 DBGPR("<--xgbe_powerup\n"); 1289 return -EINVAL; 1290 } 1291 1292 spin_lock_irqsave(&pdata->lock, flags); 1293 1294 pdata->power_down = 0; 1295 1296 xgbe_napi_enable(pdata, 0); 1297 1298 hw_if->powerup_tx(pdata); 1299 hw_if->powerup_rx(pdata); 1300 1301 if (caller == XGMAC_DRIVER_CONTEXT) 1302 netif_device_attach(netdev); 1303 1304 netif_tx_start_all_queues(netdev); 1305 1306 xgbe_start_timers(pdata); 1307 1308 spin_unlock_irqrestore(&pdata->lock, flags); 1309 1310 DBGPR("<--xgbe_powerup\n"); 1311 1312 return 0; 1313 } 1314 1315 static int xgbe_start(struct xgbe_prv_data *pdata) 1316 { 1317 struct xgbe_hw_if *hw_if = &pdata->hw_if; 1318 struct xgbe_phy_if *phy_if = &pdata->phy_if; 1319 struct net_device *netdev = pdata->netdev; 1320 int ret; 1321 1322 DBGPR("-->xgbe_start\n"); 1323 1324 ret = hw_if->init(pdata); 1325 if (ret) 1326 return ret; 1327 1328 xgbe_napi_enable(pdata, 1); 1329 1330 ret = xgbe_request_irqs(pdata); 1331 if (ret) 1332 goto err_napi; 1333 1334 ret = phy_if->phy_start(pdata); 1335 if (ret) 1336 goto err_irqs; 1337 1338 hw_if->enable_tx(pdata); 1339 hw_if->enable_rx(pdata); 1340 1341 udp_tunnel_get_rx_info(netdev); 1342 1343 netif_tx_start_all_queues(netdev); 1344 1345 xgbe_start_timers(pdata); 1346 queue_work(pdata->dev_workqueue, &pdata->service_work); 1347 1348 clear_bit(XGBE_STOPPED, &pdata->dev_state); 1349 1350 DBGPR("<--xgbe_start\n"); 1351 1352 return 0; 1353 1354 err_irqs: 1355 xgbe_free_irqs(pdata); 1356 1357 err_napi: 1358 xgbe_napi_disable(pdata, 1); 1359 1360 hw_if->exit(pdata); 1361 1362 return ret; 1363 } 1364 1365 static void xgbe_stop(struct xgbe_prv_data *pdata) 1366 { 1367 struct xgbe_hw_if *hw_if = &pdata->hw_if; 1368 struct xgbe_phy_if *phy_if = &pdata->phy_if; 1369 struct xgbe_channel *channel; 1370 struct net_device *netdev = pdata->netdev; 1371 struct netdev_queue *txq; 1372 unsigned int i; 1373 1374 DBGPR("-->xgbe_stop\n"); 1375 1376 if (test_bit(XGBE_STOPPED, &pdata->dev_state)) 1377 return; 1378 1379 netif_tx_stop_all_queues(netdev); 1380 1381 xgbe_stop_timers(pdata); 1382 flush_workqueue(pdata->dev_workqueue); 1383 1384 xgbe_reset_vxlan_accel(pdata); 1385 1386 hw_if->disable_tx(pdata); 1387 hw_if->disable_rx(pdata); 1388 1389 phy_if->phy_stop(pdata); 1390 1391 xgbe_free_irqs(pdata); 1392 1393 xgbe_napi_disable(pdata, 1); 1394 1395 hw_if->exit(pdata); 1396 1397 for (i = 0; i < pdata->channel_count; i++) { 1398 channel = pdata->channel[i]; 1399 if (!channel->tx_ring) 1400 continue; 1401 1402 txq = netdev_get_tx_queue(netdev, channel->queue_index); 1403 netdev_tx_reset_queue(txq); 1404 } 1405 1406 set_bit(XGBE_STOPPED, &pdata->dev_state); 1407 1408 DBGPR("<--xgbe_stop\n"); 1409 } 1410 1411 static void xgbe_stopdev(struct work_struct *work) 1412 { 1413 struct xgbe_prv_data *pdata = container_of(work, 1414 struct xgbe_prv_data, 1415 stopdev_work); 1416 1417 rtnl_lock(); 1418 1419 xgbe_stop(pdata); 1420 1421 xgbe_free_tx_data(pdata); 1422 xgbe_free_rx_data(pdata); 1423 1424 rtnl_unlock(); 1425 1426 netdev_alert(pdata->netdev, "device stopped\n"); 1427 } 1428 1429 static void xgbe_restart_dev(struct xgbe_prv_data *pdata) 1430 { 1431 DBGPR("-->xgbe_restart_dev\n"); 1432 1433 /* If not running, "restart" will happen on open */ 1434 if (!netif_running(pdata->netdev)) 1435 return; 1436 1437 xgbe_stop(pdata); 1438 1439 xgbe_free_tx_data(pdata); 1440 xgbe_free_rx_data(pdata); 1441 1442 xgbe_start(pdata); 1443 1444 DBGPR("<--xgbe_restart_dev\n"); 1445 } 1446 1447 static void xgbe_restart(struct work_struct *work) 1448 { 1449 struct xgbe_prv_data *pdata = container_of(work, 1450 struct xgbe_prv_data, 1451 restart_work); 1452 1453 rtnl_lock(); 1454 1455 xgbe_restart_dev(pdata); 1456 1457 rtnl_unlock(); 1458 } 1459 1460 static void xgbe_tx_tstamp(struct work_struct *work) 1461 { 1462 struct xgbe_prv_data *pdata = container_of(work, 1463 struct xgbe_prv_data, 1464 tx_tstamp_work); 1465 struct skb_shared_hwtstamps hwtstamps; 1466 u64 nsec; 1467 unsigned long flags; 1468 1469 spin_lock_irqsave(&pdata->tstamp_lock, flags); 1470 if (!pdata->tx_tstamp_skb) 1471 goto unlock; 1472 1473 if (pdata->tx_tstamp) { 1474 nsec = timecounter_cyc2time(&pdata->tstamp_tc, 1475 pdata->tx_tstamp); 1476 1477 memset(&hwtstamps, 0, sizeof(hwtstamps)); 1478 hwtstamps.hwtstamp = ns_to_ktime(nsec); 1479 skb_tstamp_tx(pdata->tx_tstamp_skb, &hwtstamps); 1480 } 1481 1482 dev_kfree_skb_any(pdata->tx_tstamp_skb); 1483 1484 pdata->tx_tstamp_skb = NULL; 1485 1486 unlock: 1487 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 1488 } 1489 1490 static int xgbe_get_hwtstamp_settings(struct xgbe_prv_data *pdata, 1491 struct ifreq *ifreq) 1492 { 1493 if (copy_to_user(ifreq->ifr_data, &pdata->tstamp_config, 1494 sizeof(pdata->tstamp_config))) 1495 return -EFAULT; 1496 1497 return 0; 1498 } 1499 1500 static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata, 1501 struct ifreq *ifreq) 1502 { 1503 struct hwtstamp_config config; 1504 unsigned int mac_tscr; 1505 1506 if (copy_from_user(&config, ifreq->ifr_data, sizeof(config))) 1507 return -EFAULT; 1508 1509 if (config.flags) 1510 return -EINVAL; 1511 1512 mac_tscr = 0; 1513 1514 switch (config.tx_type) { 1515 case HWTSTAMP_TX_OFF: 1516 break; 1517 1518 case HWTSTAMP_TX_ON: 1519 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1520 break; 1521 1522 default: 1523 return -ERANGE; 1524 } 1525 1526 switch (config.rx_filter) { 1527 case HWTSTAMP_FILTER_NONE: 1528 break; 1529 1530 case HWTSTAMP_FILTER_NTP_ALL: 1531 case HWTSTAMP_FILTER_ALL: 1532 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENALL, 1); 1533 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1534 break; 1535 1536 /* PTP v2, UDP, any kind of event packet */ 1537 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 1538 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); 1539 /* PTP v1, UDP, any kind of event packet */ 1540 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 1541 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); 1542 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); 1543 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1); 1544 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1545 break; 1546 1547 /* PTP v2, UDP, Sync packet */ 1548 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 1549 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); 1550 /* PTP v1, UDP, Sync packet */ 1551 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 1552 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); 1553 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); 1554 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1); 1555 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1556 break; 1557 1558 /* PTP v2, UDP, Delay_req packet */ 1559 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 1560 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); 1561 /* PTP v1, UDP, Delay_req packet */ 1562 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 1563 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); 1564 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); 1565 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1); 1566 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1); 1567 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1568 break; 1569 1570 /* 802.AS1, Ethernet, any kind of event packet */ 1571 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 1572 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1); 1573 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1); 1574 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1575 break; 1576 1577 /* 802.AS1, Ethernet, Sync packet */ 1578 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 1579 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1); 1580 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1); 1581 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1582 break; 1583 1584 /* 802.AS1, Ethernet, Delay_req packet */ 1585 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 1586 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, AV8021ASMEN, 1); 1587 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1); 1588 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1); 1589 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1590 break; 1591 1592 /* PTP v2/802.AS1, any layer, any kind of event packet */ 1593 case HWTSTAMP_FILTER_PTP_V2_EVENT: 1594 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); 1595 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1); 1596 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); 1597 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); 1598 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, SNAPTYPSEL, 1); 1599 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1600 break; 1601 1602 /* PTP v2/802.AS1, any layer, Sync packet */ 1603 case HWTSTAMP_FILTER_PTP_V2_SYNC: 1604 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); 1605 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1); 1606 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); 1607 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); 1608 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1); 1609 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1610 break; 1611 1612 /* PTP v2/802.AS1, any layer, Delay_req packet */ 1613 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 1614 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1); 1615 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPENA, 1); 1616 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1); 1617 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1); 1618 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSMSTRENA, 1); 1619 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSEVNTENA, 1); 1620 XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSENA, 1); 1621 break; 1622 1623 default: 1624 return -ERANGE; 1625 } 1626 1627 pdata->hw_if.config_tstamp(pdata, mac_tscr); 1628 1629 memcpy(&pdata->tstamp_config, &config, sizeof(config)); 1630 1631 return 0; 1632 } 1633 1634 static void xgbe_prep_tx_tstamp(struct xgbe_prv_data *pdata, 1635 struct sk_buff *skb, 1636 struct xgbe_packet_data *packet) 1637 { 1638 unsigned long flags; 1639 1640 if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, PTP)) { 1641 spin_lock_irqsave(&pdata->tstamp_lock, flags); 1642 if (pdata->tx_tstamp_skb) { 1643 /* Another timestamp in progress, ignore this one */ 1644 XGMAC_SET_BITS(packet->attributes, 1645 TX_PACKET_ATTRIBUTES, PTP, 0); 1646 } else { 1647 pdata->tx_tstamp_skb = skb_get(skb); 1648 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; 1649 } 1650 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 1651 } 1652 1653 skb_tx_timestamp(skb); 1654 } 1655 1656 static void xgbe_prep_vlan(struct sk_buff *skb, struct xgbe_packet_data *packet) 1657 { 1658 if (skb_vlan_tag_present(skb)) 1659 packet->vlan_ctag = skb_vlan_tag_get(skb); 1660 } 1661 1662 static int xgbe_prep_tso(struct sk_buff *skb, struct xgbe_packet_data *packet) 1663 { 1664 int ret; 1665 1666 if (!XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1667 TSO_ENABLE)) 1668 return 0; 1669 1670 ret = skb_cow_head(skb, 0); 1671 if (ret) 1672 return ret; 1673 1674 if (XGMAC_GET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, VXLAN)) { 1675 packet->header_len = skb_inner_transport_offset(skb) + 1676 inner_tcp_hdrlen(skb); 1677 packet->tcp_header_len = inner_tcp_hdrlen(skb); 1678 } else { 1679 packet->header_len = skb_transport_offset(skb) + 1680 tcp_hdrlen(skb); 1681 packet->tcp_header_len = tcp_hdrlen(skb); 1682 } 1683 packet->tcp_payload_len = skb->len - packet->header_len; 1684 packet->mss = skb_shinfo(skb)->gso_size; 1685 1686 DBGPR(" packet->header_len=%u\n", packet->header_len); 1687 DBGPR(" packet->tcp_header_len=%u, packet->tcp_payload_len=%u\n", 1688 packet->tcp_header_len, packet->tcp_payload_len); 1689 DBGPR(" packet->mss=%u\n", packet->mss); 1690 1691 /* Update the number of packets that will ultimately be transmitted 1692 * along with the extra bytes for each extra packet 1693 */ 1694 packet->tx_packets = skb_shinfo(skb)->gso_segs; 1695 packet->tx_bytes += (packet->tx_packets - 1) * packet->header_len; 1696 1697 return 0; 1698 } 1699 1700 static bool xgbe_is_vxlan(struct xgbe_prv_data *pdata, struct sk_buff *skb) 1701 { 1702 struct xgbe_vxlan_data *vdata; 1703 1704 if (pdata->vxlan_force_disable) 1705 return false; 1706 1707 if (!skb->encapsulation) 1708 return false; 1709 1710 if (skb->ip_summed != CHECKSUM_PARTIAL) 1711 return false; 1712 1713 switch (skb->protocol) { 1714 case htons(ETH_P_IP): 1715 if (ip_hdr(skb)->protocol != IPPROTO_UDP) 1716 return false; 1717 break; 1718 1719 case htons(ETH_P_IPV6): 1720 if (ipv6_hdr(skb)->nexthdr != IPPROTO_UDP) 1721 return false; 1722 break; 1723 1724 default: 1725 return false; 1726 } 1727 1728 /* See if we have the UDP port in our list */ 1729 list_for_each_entry(vdata, &pdata->vxlan_ports, list) { 1730 if ((skb->protocol == htons(ETH_P_IP)) && 1731 (vdata->sa_family == AF_INET) && 1732 (vdata->port == udp_hdr(skb)->dest)) 1733 return true; 1734 else if ((skb->protocol == htons(ETH_P_IPV6)) && 1735 (vdata->sa_family == AF_INET6) && 1736 (vdata->port == udp_hdr(skb)->dest)) 1737 return true; 1738 } 1739 1740 return false; 1741 } 1742 1743 static int xgbe_is_tso(struct sk_buff *skb) 1744 { 1745 if (skb->ip_summed != CHECKSUM_PARTIAL) 1746 return 0; 1747 1748 if (!skb_is_gso(skb)) 1749 return 0; 1750 1751 DBGPR(" TSO packet to be processed\n"); 1752 1753 return 1; 1754 } 1755 1756 static void xgbe_packet_info(struct xgbe_prv_data *pdata, 1757 struct xgbe_ring *ring, struct sk_buff *skb, 1758 struct xgbe_packet_data *packet) 1759 { 1760 struct skb_frag_struct *frag; 1761 unsigned int context_desc; 1762 unsigned int len; 1763 unsigned int i; 1764 1765 packet->skb = skb; 1766 1767 context_desc = 0; 1768 packet->rdesc_count = 0; 1769 1770 packet->tx_packets = 1; 1771 packet->tx_bytes = skb->len; 1772 1773 if (xgbe_is_tso(skb)) { 1774 /* TSO requires an extra descriptor if mss is different */ 1775 if (skb_shinfo(skb)->gso_size != ring->tx.cur_mss) { 1776 context_desc = 1; 1777 packet->rdesc_count++; 1778 } 1779 1780 /* TSO requires an extra descriptor for TSO header */ 1781 packet->rdesc_count++; 1782 1783 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1784 TSO_ENABLE, 1); 1785 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1786 CSUM_ENABLE, 1); 1787 } else if (skb->ip_summed == CHECKSUM_PARTIAL) 1788 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1789 CSUM_ENABLE, 1); 1790 1791 if (xgbe_is_vxlan(pdata, skb)) 1792 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1793 VXLAN, 1); 1794 1795 if (skb_vlan_tag_present(skb)) { 1796 /* VLAN requires an extra descriptor if tag is different */ 1797 if (skb_vlan_tag_get(skb) != ring->tx.cur_vlan_ctag) 1798 /* We can share with the TSO context descriptor */ 1799 if (!context_desc) { 1800 context_desc = 1; 1801 packet->rdesc_count++; 1802 } 1803 1804 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1805 VLAN_CTAG, 1); 1806 } 1807 1808 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && 1809 (pdata->tstamp_config.tx_type == HWTSTAMP_TX_ON)) 1810 XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES, 1811 PTP, 1); 1812 1813 for (len = skb_headlen(skb); len;) { 1814 packet->rdesc_count++; 1815 len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE); 1816 } 1817 1818 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1819 frag = &skb_shinfo(skb)->frags[i]; 1820 for (len = skb_frag_size(frag); len; ) { 1821 packet->rdesc_count++; 1822 len -= min_t(unsigned int, len, XGBE_TX_MAX_BUF_SIZE); 1823 } 1824 } 1825 } 1826 1827 static int xgbe_open(struct net_device *netdev) 1828 { 1829 struct xgbe_prv_data *pdata = netdev_priv(netdev); 1830 struct xgbe_desc_if *desc_if = &pdata->desc_if; 1831 int ret; 1832 1833 DBGPR("-->xgbe_open\n"); 1834 1835 /* Create the various names based on netdev name */ 1836 snprintf(pdata->an_name, sizeof(pdata->an_name) - 1, "%s-pcs", 1837 netdev_name(netdev)); 1838 1839 snprintf(pdata->ecc_name, sizeof(pdata->ecc_name) - 1, "%s-ecc", 1840 netdev_name(netdev)); 1841 1842 snprintf(pdata->i2c_name, sizeof(pdata->i2c_name) - 1, "%s-i2c", 1843 netdev_name(netdev)); 1844 1845 /* Create workqueues */ 1846 pdata->dev_workqueue = 1847 create_singlethread_workqueue(netdev_name(netdev)); 1848 if (!pdata->dev_workqueue) { 1849 netdev_err(netdev, "device workqueue creation failed\n"); 1850 return -ENOMEM; 1851 } 1852 1853 pdata->an_workqueue = 1854 create_singlethread_workqueue(pdata->an_name); 1855 if (!pdata->an_workqueue) { 1856 netdev_err(netdev, "phy workqueue creation failed\n"); 1857 ret = -ENOMEM; 1858 goto err_dev_wq; 1859 } 1860 1861 /* Reset the phy settings */ 1862 ret = xgbe_phy_reset(pdata); 1863 if (ret) 1864 goto err_an_wq; 1865 1866 /* Enable the clocks */ 1867 ret = clk_prepare_enable(pdata->sysclk); 1868 if (ret) { 1869 netdev_alert(netdev, "dma clk_prepare_enable failed\n"); 1870 goto err_an_wq; 1871 } 1872 1873 ret = clk_prepare_enable(pdata->ptpclk); 1874 if (ret) { 1875 netdev_alert(netdev, "ptp clk_prepare_enable failed\n"); 1876 goto err_sysclk; 1877 } 1878 1879 /* Calculate the Rx buffer size before allocating rings */ 1880 ret = xgbe_calc_rx_buf_size(netdev, netdev->mtu); 1881 if (ret < 0) 1882 goto err_ptpclk; 1883 pdata->rx_buf_size = ret; 1884 1885 /* Allocate the channel and ring structures */ 1886 ret = xgbe_alloc_channels(pdata); 1887 if (ret) 1888 goto err_ptpclk; 1889 1890 /* Allocate the ring descriptors and buffers */ 1891 ret = desc_if->alloc_ring_resources(pdata); 1892 if (ret) 1893 goto err_channels; 1894 1895 INIT_WORK(&pdata->service_work, xgbe_service); 1896 INIT_WORK(&pdata->restart_work, xgbe_restart); 1897 INIT_WORK(&pdata->stopdev_work, xgbe_stopdev); 1898 INIT_WORK(&pdata->tx_tstamp_work, xgbe_tx_tstamp); 1899 xgbe_init_timers(pdata); 1900 1901 ret = xgbe_start(pdata); 1902 if (ret) 1903 goto err_rings; 1904 1905 clear_bit(XGBE_DOWN, &pdata->dev_state); 1906 1907 DBGPR("<--xgbe_open\n"); 1908 1909 return 0; 1910 1911 err_rings: 1912 desc_if->free_ring_resources(pdata); 1913 1914 err_channels: 1915 xgbe_free_channels(pdata); 1916 1917 err_ptpclk: 1918 clk_disable_unprepare(pdata->ptpclk); 1919 1920 err_sysclk: 1921 clk_disable_unprepare(pdata->sysclk); 1922 1923 err_an_wq: 1924 destroy_workqueue(pdata->an_workqueue); 1925 1926 err_dev_wq: 1927 destroy_workqueue(pdata->dev_workqueue); 1928 1929 return ret; 1930 } 1931 1932 static int xgbe_close(struct net_device *netdev) 1933 { 1934 struct xgbe_prv_data *pdata = netdev_priv(netdev); 1935 struct xgbe_desc_if *desc_if = &pdata->desc_if; 1936 1937 DBGPR("-->xgbe_close\n"); 1938 1939 /* Stop the device */ 1940 xgbe_stop(pdata); 1941 1942 /* Free the ring descriptors and buffers */ 1943 desc_if->free_ring_resources(pdata); 1944 1945 /* Free the channel and ring structures */ 1946 xgbe_free_channels(pdata); 1947 1948 /* Disable the clocks */ 1949 clk_disable_unprepare(pdata->ptpclk); 1950 clk_disable_unprepare(pdata->sysclk); 1951 1952 flush_workqueue(pdata->an_workqueue); 1953 destroy_workqueue(pdata->an_workqueue); 1954 1955 flush_workqueue(pdata->dev_workqueue); 1956 destroy_workqueue(pdata->dev_workqueue); 1957 1958 set_bit(XGBE_DOWN, &pdata->dev_state); 1959 1960 DBGPR("<--xgbe_close\n"); 1961 1962 return 0; 1963 } 1964 1965 static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev) 1966 { 1967 struct xgbe_prv_data *pdata = netdev_priv(netdev); 1968 struct xgbe_hw_if *hw_if = &pdata->hw_if; 1969 struct xgbe_desc_if *desc_if = &pdata->desc_if; 1970 struct xgbe_channel *channel; 1971 struct xgbe_ring *ring; 1972 struct xgbe_packet_data *packet; 1973 struct netdev_queue *txq; 1974 int ret; 1975 1976 DBGPR("-->xgbe_xmit: skb->len = %d\n", skb->len); 1977 1978 channel = pdata->channel[skb->queue_mapping]; 1979 txq = netdev_get_tx_queue(netdev, channel->queue_index); 1980 ring = channel->tx_ring; 1981 packet = &ring->packet_data; 1982 1983 ret = NETDEV_TX_OK; 1984 1985 if (skb->len == 0) { 1986 netif_err(pdata, tx_err, netdev, 1987 "empty skb received from stack\n"); 1988 dev_kfree_skb_any(skb); 1989 goto tx_netdev_return; 1990 } 1991 1992 /* Calculate preliminary packet info */ 1993 memset(packet, 0, sizeof(*packet)); 1994 xgbe_packet_info(pdata, ring, skb, packet); 1995 1996 /* Check that there are enough descriptors available */ 1997 ret = xgbe_maybe_stop_tx_queue(channel, ring, packet->rdesc_count); 1998 if (ret) 1999 goto tx_netdev_return; 2000 2001 ret = xgbe_prep_tso(skb, packet); 2002 if (ret) { 2003 netif_err(pdata, tx_err, netdev, 2004 "error processing TSO packet\n"); 2005 dev_kfree_skb_any(skb); 2006 goto tx_netdev_return; 2007 } 2008 xgbe_prep_vlan(skb, packet); 2009 2010 if (!desc_if->map_tx_skb(channel, skb)) { 2011 dev_kfree_skb_any(skb); 2012 goto tx_netdev_return; 2013 } 2014 2015 xgbe_prep_tx_tstamp(pdata, skb, packet); 2016 2017 /* Report on the actual number of bytes (to be) sent */ 2018 netdev_tx_sent_queue(txq, packet->tx_bytes); 2019 2020 /* Configure required descriptor fields for transmission */ 2021 hw_if->dev_xmit(channel); 2022 2023 if (netif_msg_pktdata(pdata)) 2024 xgbe_print_pkt(netdev, skb, true); 2025 2026 /* Stop the queue in advance if there may not be enough descriptors */ 2027 xgbe_maybe_stop_tx_queue(channel, ring, XGBE_TX_MAX_DESCS); 2028 2029 ret = NETDEV_TX_OK; 2030 2031 tx_netdev_return: 2032 return ret; 2033 } 2034 2035 static void xgbe_set_rx_mode(struct net_device *netdev) 2036 { 2037 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2038 struct xgbe_hw_if *hw_if = &pdata->hw_if; 2039 2040 DBGPR("-->xgbe_set_rx_mode\n"); 2041 2042 hw_if->config_rx_mode(pdata); 2043 2044 DBGPR("<--xgbe_set_rx_mode\n"); 2045 } 2046 2047 static int xgbe_set_mac_address(struct net_device *netdev, void *addr) 2048 { 2049 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2050 struct xgbe_hw_if *hw_if = &pdata->hw_if; 2051 struct sockaddr *saddr = addr; 2052 2053 DBGPR("-->xgbe_set_mac_address\n"); 2054 2055 if (!is_valid_ether_addr(saddr->sa_data)) 2056 return -EADDRNOTAVAIL; 2057 2058 memcpy(netdev->dev_addr, saddr->sa_data, netdev->addr_len); 2059 2060 hw_if->set_mac_address(pdata, netdev->dev_addr); 2061 2062 DBGPR("<--xgbe_set_mac_address\n"); 2063 2064 return 0; 2065 } 2066 2067 static int xgbe_ioctl(struct net_device *netdev, struct ifreq *ifreq, int cmd) 2068 { 2069 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2070 int ret; 2071 2072 switch (cmd) { 2073 case SIOCGHWTSTAMP: 2074 ret = xgbe_get_hwtstamp_settings(pdata, ifreq); 2075 break; 2076 2077 case SIOCSHWTSTAMP: 2078 ret = xgbe_set_hwtstamp_settings(pdata, ifreq); 2079 break; 2080 2081 default: 2082 ret = -EOPNOTSUPP; 2083 } 2084 2085 return ret; 2086 } 2087 2088 static int xgbe_change_mtu(struct net_device *netdev, int mtu) 2089 { 2090 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2091 int ret; 2092 2093 DBGPR("-->xgbe_change_mtu\n"); 2094 2095 ret = xgbe_calc_rx_buf_size(netdev, mtu); 2096 if (ret < 0) 2097 return ret; 2098 2099 pdata->rx_buf_size = ret; 2100 netdev->mtu = mtu; 2101 2102 xgbe_restart_dev(pdata); 2103 2104 DBGPR("<--xgbe_change_mtu\n"); 2105 2106 return 0; 2107 } 2108 2109 static void xgbe_tx_timeout(struct net_device *netdev) 2110 { 2111 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2112 2113 netdev_warn(netdev, "tx timeout, device restarting\n"); 2114 schedule_work(&pdata->restart_work); 2115 } 2116 2117 static void xgbe_get_stats64(struct net_device *netdev, 2118 struct rtnl_link_stats64 *s) 2119 { 2120 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2121 struct xgbe_mmc_stats *pstats = &pdata->mmc_stats; 2122 2123 DBGPR("-->%s\n", __func__); 2124 2125 pdata->hw_if.read_mmc_stats(pdata); 2126 2127 s->rx_packets = pstats->rxframecount_gb; 2128 s->rx_bytes = pstats->rxoctetcount_gb; 2129 s->rx_errors = pstats->rxframecount_gb - 2130 pstats->rxbroadcastframes_g - 2131 pstats->rxmulticastframes_g - 2132 pstats->rxunicastframes_g; 2133 s->multicast = pstats->rxmulticastframes_g; 2134 s->rx_length_errors = pstats->rxlengtherror; 2135 s->rx_crc_errors = pstats->rxcrcerror; 2136 s->rx_fifo_errors = pstats->rxfifooverflow; 2137 2138 s->tx_packets = pstats->txframecount_gb; 2139 s->tx_bytes = pstats->txoctetcount_gb; 2140 s->tx_errors = pstats->txframecount_gb - pstats->txframecount_g; 2141 s->tx_dropped = netdev->stats.tx_dropped; 2142 2143 DBGPR("<--%s\n", __func__); 2144 } 2145 2146 static int xgbe_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, 2147 u16 vid) 2148 { 2149 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2150 struct xgbe_hw_if *hw_if = &pdata->hw_if; 2151 2152 DBGPR("-->%s\n", __func__); 2153 2154 set_bit(vid, pdata->active_vlans); 2155 hw_if->update_vlan_hash_table(pdata); 2156 2157 DBGPR("<--%s\n", __func__); 2158 2159 return 0; 2160 } 2161 2162 static int xgbe_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, 2163 u16 vid) 2164 { 2165 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2166 struct xgbe_hw_if *hw_if = &pdata->hw_if; 2167 2168 DBGPR("-->%s\n", __func__); 2169 2170 clear_bit(vid, pdata->active_vlans); 2171 hw_if->update_vlan_hash_table(pdata); 2172 2173 DBGPR("<--%s\n", __func__); 2174 2175 return 0; 2176 } 2177 2178 #ifdef CONFIG_NET_POLL_CONTROLLER 2179 static void xgbe_poll_controller(struct net_device *netdev) 2180 { 2181 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2182 struct xgbe_channel *channel; 2183 unsigned int i; 2184 2185 DBGPR("-->xgbe_poll_controller\n"); 2186 2187 if (pdata->per_channel_irq) { 2188 for (i = 0; i < pdata->channel_count; i++) { 2189 channel = pdata->channel[i]; 2190 xgbe_dma_isr(channel->dma_irq, channel); 2191 } 2192 } else { 2193 disable_irq(pdata->dev_irq); 2194 xgbe_isr(pdata->dev_irq, pdata); 2195 enable_irq(pdata->dev_irq); 2196 } 2197 2198 DBGPR("<--xgbe_poll_controller\n"); 2199 } 2200 #endif /* End CONFIG_NET_POLL_CONTROLLER */ 2201 2202 static int xgbe_setup_tc(struct net_device *netdev, enum tc_setup_type type, 2203 void *type_data) 2204 { 2205 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2206 struct tc_mqprio_qopt *mqprio = type_data; 2207 u8 tc; 2208 2209 if (type != TC_SETUP_QDISC_MQPRIO) 2210 return -EOPNOTSUPP; 2211 2212 mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS; 2213 tc = mqprio->num_tc; 2214 2215 if (tc > pdata->hw_feat.tc_cnt) 2216 return -EINVAL; 2217 2218 pdata->num_tcs = tc; 2219 pdata->hw_if.config_tc(pdata); 2220 2221 return 0; 2222 } 2223 2224 static netdev_features_t xgbe_fix_features(struct net_device *netdev, 2225 netdev_features_t features) 2226 { 2227 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2228 netdev_features_t vxlan_base, vxlan_mask; 2229 2230 vxlan_base = NETIF_F_GSO_UDP_TUNNEL | NETIF_F_RX_UDP_TUNNEL_PORT; 2231 vxlan_mask = vxlan_base | NETIF_F_GSO_UDP_TUNNEL_CSUM; 2232 2233 pdata->vxlan_features = features & vxlan_mask; 2234 2235 /* Only fix VXLAN-related features */ 2236 if (!pdata->vxlan_features) 2237 return features; 2238 2239 /* If VXLAN isn't supported then clear any features: 2240 * This is needed because NETIF_F_RX_UDP_TUNNEL_PORT gets 2241 * automatically set if ndo_udp_tunnel_add is set. 2242 */ 2243 if (!pdata->hw_feat.vxn) 2244 return features & ~vxlan_mask; 2245 2246 /* VXLAN CSUM requires VXLAN base */ 2247 if ((features & NETIF_F_GSO_UDP_TUNNEL_CSUM) && 2248 !(features & NETIF_F_GSO_UDP_TUNNEL)) { 2249 netdev_notice(netdev, 2250 "forcing tx udp tunnel support\n"); 2251 features |= NETIF_F_GSO_UDP_TUNNEL; 2252 } 2253 2254 /* Can't do one without doing the other */ 2255 if ((features & vxlan_base) != vxlan_base) { 2256 netdev_notice(netdev, 2257 "forcing both tx and rx udp tunnel support\n"); 2258 features |= vxlan_base; 2259 } 2260 2261 if (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) { 2262 if (!(features & NETIF_F_GSO_UDP_TUNNEL_CSUM)) { 2263 netdev_notice(netdev, 2264 "forcing tx udp tunnel checksumming on\n"); 2265 features |= NETIF_F_GSO_UDP_TUNNEL_CSUM; 2266 } 2267 } else { 2268 if (features & NETIF_F_GSO_UDP_TUNNEL_CSUM) { 2269 netdev_notice(netdev, 2270 "forcing tx udp tunnel checksumming off\n"); 2271 features &= ~NETIF_F_GSO_UDP_TUNNEL_CSUM; 2272 } 2273 } 2274 2275 pdata->vxlan_features = features & vxlan_mask; 2276 2277 /* Adjust UDP Tunnel based on current state */ 2278 if (pdata->vxlan_force_disable) { 2279 netdev_notice(netdev, 2280 "VXLAN acceleration disabled, turning off udp tunnel features\n"); 2281 features &= ~vxlan_mask; 2282 } 2283 2284 return features; 2285 } 2286 2287 static int xgbe_set_features(struct net_device *netdev, 2288 netdev_features_t features) 2289 { 2290 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2291 struct xgbe_hw_if *hw_if = &pdata->hw_if; 2292 netdev_features_t rxhash, rxcsum, rxvlan, rxvlan_filter; 2293 netdev_features_t udp_tunnel; 2294 int ret = 0; 2295 2296 rxhash = pdata->netdev_features & NETIF_F_RXHASH; 2297 rxcsum = pdata->netdev_features & NETIF_F_RXCSUM; 2298 rxvlan = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_RX; 2299 rxvlan_filter = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_FILTER; 2300 udp_tunnel = pdata->netdev_features & NETIF_F_GSO_UDP_TUNNEL; 2301 2302 if ((features & NETIF_F_RXHASH) && !rxhash) 2303 ret = hw_if->enable_rss(pdata); 2304 else if (!(features & NETIF_F_RXHASH) && rxhash) 2305 ret = hw_if->disable_rss(pdata); 2306 if (ret) 2307 return ret; 2308 2309 if ((features & NETIF_F_RXCSUM) && !rxcsum) 2310 hw_if->enable_rx_csum(pdata); 2311 else if (!(features & NETIF_F_RXCSUM) && rxcsum) 2312 hw_if->disable_rx_csum(pdata); 2313 2314 if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan) 2315 hw_if->enable_rx_vlan_stripping(pdata); 2316 else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) && rxvlan) 2317 hw_if->disable_rx_vlan_stripping(pdata); 2318 2319 if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) && !rxvlan_filter) 2320 hw_if->enable_rx_vlan_filtering(pdata); 2321 else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) && rxvlan_filter) 2322 hw_if->disable_rx_vlan_filtering(pdata); 2323 2324 if ((features & NETIF_F_GSO_UDP_TUNNEL) && !udp_tunnel) 2325 xgbe_enable_vxlan_accel(pdata); 2326 else if (!(features & NETIF_F_GSO_UDP_TUNNEL) && udp_tunnel) 2327 xgbe_disable_vxlan_accel(pdata); 2328 2329 pdata->netdev_features = features; 2330 2331 DBGPR("<--xgbe_set_features\n"); 2332 2333 return 0; 2334 } 2335 2336 static void xgbe_udp_tunnel_add(struct net_device *netdev, 2337 struct udp_tunnel_info *ti) 2338 { 2339 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2340 struct xgbe_vxlan_data *vdata; 2341 2342 if (!pdata->hw_feat.vxn) 2343 return; 2344 2345 if (ti->type != UDP_TUNNEL_TYPE_VXLAN) 2346 return; 2347 2348 pdata->vxlan_port_count++; 2349 2350 netif_dbg(pdata, drv, netdev, 2351 "adding VXLAN tunnel, family=%hx/port=%hx\n", 2352 ti->sa_family, be16_to_cpu(ti->port)); 2353 2354 if (pdata->vxlan_force_disable) 2355 return; 2356 2357 vdata = kzalloc(sizeof(*vdata), GFP_ATOMIC); 2358 if (!vdata) { 2359 /* Can no longer properly track VXLAN ports */ 2360 pdata->vxlan_force_disable = 1; 2361 netif_dbg(pdata, drv, netdev, 2362 "internal error, disabling VXLAN accelerations\n"); 2363 2364 xgbe_disable_vxlan_accel(pdata); 2365 2366 return; 2367 } 2368 vdata->sa_family = ti->sa_family; 2369 vdata->port = ti->port; 2370 2371 list_add_tail(&vdata->list, &pdata->vxlan_ports); 2372 2373 /* First port added? */ 2374 if (pdata->vxlan_port_count == 1) { 2375 xgbe_enable_vxlan_accel(pdata); 2376 2377 return; 2378 } 2379 } 2380 2381 static void xgbe_udp_tunnel_del(struct net_device *netdev, 2382 struct udp_tunnel_info *ti) 2383 { 2384 struct xgbe_prv_data *pdata = netdev_priv(netdev); 2385 struct xgbe_vxlan_data *vdata; 2386 2387 if (!pdata->hw_feat.vxn) 2388 return; 2389 2390 if (ti->type != UDP_TUNNEL_TYPE_VXLAN) 2391 return; 2392 2393 netif_dbg(pdata, drv, netdev, 2394 "deleting VXLAN tunnel, family=%hx/port=%hx\n", 2395 ti->sa_family, be16_to_cpu(ti->port)); 2396 2397 /* Don't need safe version since loop terminates with deletion */ 2398 list_for_each_entry(vdata, &pdata->vxlan_ports, list) { 2399 if (vdata->sa_family != ti->sa_family) 2400 continue; 2401 2402 if (vdata->port != ti->port) 2403 continue; 2404 2405 list_del(&vdata->list); 2406 kfree(vdata); 2407 2408 break; 2409 } 2410 2411 pdata->vxlan_port_count--; 2412 if (!pdata->vxlan_port_count) { 2413 xgbe_reset_vxlan_accel(pdata); 2414 2415 return; 2416 } 2417 2418 if (pdata->vxlan_force_disable) 2419 return; 2420 2421 /* See if VXLAN tunnel id needs to be changed */ 2422 vdata = list_first_entry(&pdata->vxlan_ports, 2423 struct xgbe_vxlan_data, list); 2424 if (pdata->vxlan_port == be16_to_cpu(vdata->port)) 2425 return; 2426 2427 pdata->vxlan_port = be16_to_cpu(vdata->port); 2428 pdata->hw_if.set_vxlan_id(pdata); 2429 } 2430 2431 static netdev_features_t xgbe_features_check(struct sk_buff *skb, 2432 struct net_device *netdev, 2433 netdev_features_t features) 2434 { 2435 features = vlan_features_check(skb, features); 2436 features = vxlan_features_check(skb, features); 2437 2438 return features; 2439 } 2440 2441 static const struct net_device_ops xgbe_netdev_ops = { 2442 .ndo_open = xgbe_open, 2443 .ndo_stop = xgbe_close, 2444 .ndo_start_xmit = xgbe_xmit, 2445 .ndo_set_rx_mode = xgbe_set_rx_mode, 2446 .ndo_set_mac_address = xgbe_set_mac_address, 2447 .ndo_validate_addr = eth_validate_addr, 2448 .ndo_do_ioctl = xgbe_ioctl, 2449 .ndo_change_mtu = xgbe_change_mtu, 2450 .ndo_tx_timeout = xgbe_tx_timeout, 2451 .ndo_get_stats64 = xgbe_get_stats64, 2452 .ndo_vlan_rx_add_vid = xgbe_vlan_rx_add_vid, 2453 .ndo_vlan_rx_kill_vid = xgbe_vlan_rx_kill_vid, 2454 #ifdef CONFIG_NET_POLL_CONTROLLER 2455 .ndo_poll_controller = xgbe_poll_controller, 2456 #endif 2457 .ndo_setup_tc = xgbe_setup_tc, 2458 .ndo_fix_features = xgbe_fix_features, 2459 .ndo_set_features = xgbe_set_features, 2460 .ndo_udp_tunnel_add = xgbe_udp_tunnel_add, 2461 .ndo_udp_tunnel_del = xgbe_udp_tunnel_del, 2462 .ndo_features_check = xgbe_features_check, 2463 }; 2464 2465 const struct net_device_ops *xgbe_get_netdev_ops(void) 2466 { 2467 return &xgbe_netdev_ops; 2468 } 2469 2470 static void xgbe_rx_refresh(struct xgbe_channel *channel) 2471 { 2472 struct xgbe_prv_data *pdata = channel->pdata; 2473 struct xgbe_hw_if *hw_if = &pdata->hw_if; 2474 struct xgbe_desc_if *desc_if = &pdata->desc_if; 2475 struct xgbe_ring *ring = channel->rx_ring; 2476 struct xgbe_ring_data *rdata; 2477 2478 while (ring->dirty != ring->cur) { 2479 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty); 2480 2481 /* Reset rdata values */ 2482 desc_if->unmap_rdata(pdata, rdata); 2483 2484 if (desc_if->map_rx_buffer(pdata, ring, rdata)) 2485 break; 2486 2487 hw_if->rx_desc_reset(pdata, rdata, ring->dirty); 2488 2489 ring->dirty++; 2490 } 2491 2492 /* Make sure everything is written before the register write */ 2493 wmb(); 2494 2495 /* Update the Rx Tail Pointer Register with address of 2496 * the last cleaned entry */ 2497 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty - 1); 2498 XGMAC_DMA_IOWRITE(channel, DMA_CH_RDTR_LO, 2499 lower_32_bits(rdata->rdesc_dma)); 2500 } 2501 2502 static struct sk_buff *xgbe_create_skb(struct xgbe_prv_data *pdata, 2503 struct napi_struct *napi, 2504 struct xgbe_ring_data *rdata, 2505 unsigned int len) 2506 { 2507 struct sk_buff *skb; 2508 u8 *packet; 2509 2510 skb = napi_alloc_skb(napi, rdata->rx.hdr.dma_len); 2511 if (!skb) 2512 return NULL; 2513 2514 /* Pull in the header buffer which may contain just the header 2515 * or the header plus data 2516 */ 2517 dma_sync_single_range_for_cpu(pdata->dev, rdata->rx.hdr.dma_base, 2518 rdata->rx.hdr.dma_off, 2519 rdata->rx.hdr.dma_len, DMA_FROM_DEVICE); 2520 2521 packet = page_address(rdata->rx.hdr.pa.pages) + 2522 rdata->rx.hdr.pa.pages_offset; 2523 skb_copy_to_linear_data(skb, packet, len); 2524 skb_put(skb, len); 2525 2526 return skb; 2527 } 2528 2529 static unsigned int xgbe_rx_buf1_len(struct xgbe_ring_data *rdata, 2530 struct xgbe_packet_data *packet) 2531 { 2532 /* Always zero if not the first descriptor */ 2533 if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, FIRST)) 2534 return 0; 2535 2536 /* First descriptor with split header, return header length */ 2537 if (rdata->rx.hdr_len) 2538 return rdata->rx.hdr_len; 2539 2540 /* First descriptor but not the last descriptor and no split header, 2541 * so the full buffer was used 2542 */ 2543 if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, LAST)) 2544 return rdata->rx.hdr.dma_len; 2545 2546 /* First descriptor and last descriptor and no split header, so 2547 * calculate how much of the buffer was used 2548 */ 2549 return min_t(unsigned int, rdata->rx.hdr.dma_len, rdata->rx.len); 2550 } 2551 2552 static unsigned int xgbe_rx_buf2_len(struct xgbe_ring_data *rdata, 2553 struct xgbe_packet_data *packet, 2554 unsigned int len) 2555 { 2556 /* Always the full buffer if not the last descriptor */ 2557 if (!XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, LAST)) 2558 return rdata->rx.buf.dma_len; 2559 2560 /* Last descriptor so calculate how much of the buffer was used 2561 * for the last bit of data 2562 */ 2563 return rdata->rx.len - len; 2564 } 2565 2566 static int xgbe_tx_poll(struct xgbe_channel *channel) 2567 { 2568 struct xgbe_prv_data *pdata = channel->pdata; 2569 struct xgbe_hw_if *hw_if = &pdata->hw_if; 2570 struct xgbe_desc_if *desc_if = &pdata->desc_if; 2571 struct xgbe_ring *ring = channel->tx_ring; 2572 struct xgbe_ring_data *rdata; 2573 struct xgbe_ring_desc *rdesc; 2574 struct net_device *netdev = pdata->netdev; 2575 struct netdev_queue *txq; 2576 int processed = 0; 2577 unsigned int tx_packets = 0, tx_bytes = 0; 2578 unsigned int cur; 2579 2580 DBGPR("-->xgbe_tx_poll\n"); 2581 2582 /* Nothing to do if there isn't a Tx ring for this channel */ 2583 if (!ring) 2584 return 0; 2585 2586 cur = ring->cur; 2587 2588 /* Be sure we get ring->cur before accessing descriptor data */ 2589 smp_rmb(); 2590 2591 txq = netdev_get_tx_queue(netdev, channel->queue_index); 2592 2593 while ((processed < XGBE_TX_DESC_MAX_PROC) && 2594 (ring->dirty != cur)) { 2595 rdata = XGBE_GET_DESC_DATA(ring, ring->dirty); 2596 rdesc = rdata->rdesc; 2597 2598 if (!hw_if->tx_complete(rdesc)) 2599 break; 2600 2601 /* Make sure descriptor fields are read after reading the OWN 2602 * bit */ 2603 dma_rmb(); 2604 2605 if (netif_msg_tx_done(pdata)) 2606 xgbe_dump_tx_desc(pdata, ring, ring->dirty, 1, 0); 2607 2608 if (hw_if->is_last_desc(rdesc)) { 2609 tx_packets += rdata->tx.packets; 2610 tx_bytes += rdata->tx.bytes; 2611 } 2612 2613 /* Free the SKB and reset the descriptor for re-use */ 2614 desc_if->unmap_rdata(pdata, rdata); 2615 hw_if->tx_desc_reset(rdata); 2616 2617 processed++; 2618 ring->dirty++; 2619 } 2620 2621 if (!processed) 2622 return 0; 2623 2624 netdev_tx_completed_queue(txq, tx_packets, tx_bytes); 2625 2626 if ((ring->tx.queue_stopped == 1) && 2627 (xgbe_tx_avail_desc(ring) > XGBE_TX_DESC_MIN_FREE)) { 2628 ring->tx.queue_stopped = 0; 2629 netif_tx_wake_queue(txq); 2630 } 2631 2632 DBGPR("<--xgbe_tx_poll: processed=%d\n", processed); 2633 2634 return processed; 2635 } 2636 2637 static int xgbe_rx_poll(struct xgbe_channel *channel, int budget) 2638 { 2639 struct xgbe_prv_data *pdata = channel->pdata; 2640 struct xgbe_hw_if *hw_if = &pdata->hw_if; 2641 struct xgbe_ring *ring = channel->rx_ring; 2642 struct xgbe_ring_data *rdata; 2643 struct xgbe_packet_data *packet; 2644 struct net_device *netdev = pdata->netdev; 2645 struct napi_struct *napi; 2646 struct sk_buff *skb; 2647 struct skb_shared_hwtstamps *hwtstamps; 2648 unsigned int last, error, context_next, context; 2649 unsigned int len, buf1_len, buf2_len, max_len; 2650 unsigned int received = 0; 2651 int packet_count = 0; 2652 2653 DBGPR("-->xgbe_rx_poll: budget=%d\n", budget); 2654 2655 /* Nothing to do if there isn't a Rx ring for this channel */ 2656 if (!ring) 2657 return 0; 2658 2659 last = 0; 2660 context_next = 0; 2661 2662 napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi; 2663 2664 rdata = XGBE_GET_DESC_DATA(ring, ring->cur); 2665 packet = &ring->packet_data; 2666 while (packet_count < budget) { 2667 DBGPR(" cur = %d\n", ring->cur); 2668 2669 /* First time in loop see if we need to restore state */ 2670 if (!received && rdata->state_saved) { 2671 skb = rdata->state.skb; 2672 error = rdata->state.error; 2673 len = rdata->state.len; 2674 } else { 2675 memset(packet, 0, sizeof(*packet)); 2676 skb = NULL; 2677 error = 0; 2678 len = 0; 2679 } 2680 2681 read_again: 2682 rdata = XGBE_GET_DESC_DATA(ring, ring->cur); 2683 2684 if (xgbe_rx_dirty_desc(ring) > (XGBE_RX_DESC_CNT >> 3)) 2685 xgbe_rx_refresh(channel); 2686 2687 if (hw_if->dev_read(channel)) 2688 break; 2689 2690 received++; 2691 ring->cur++; 2692 2693 last = XGMAC_GET_BITS(packet->attributes, RX_PACKET_ATTRIBUTES, 2694 LAST); 2695 context_next = XGMAC_GET_BITS(packet->attributes, 2696 RX_PACKET_ATTRIBUTES, 2697 CONTEXT_NEXT); 2698 context = XGMAC_GET_BITS(packet->attributes, 2699 RX_PACKET_ATTRIBUTES, 2700 CONTEXT); 2701 2702 /* Earlier error, just drain the remaining data */ 2703 if ((!last || context_next) && error) 2704 goto read_again; 2705 2706 if (error || packet->errors) { 2707 if (packet->errors) 2708 netif_err(pdata, rx_err, netdev, 2709 "error in received packet\n"); 2710 dev_kfree_skb(skb); 2711 goto next_packet; 2712 } 2713 2714 if (!context) { 2715 /* Get the data length in the descriptor buffers */ 2716 buf1_len = xgbe_rx_buf1_len(rdata, packet); 2717 len += buf1_len; 2718 buf2_len = xgbe_rx_buf2_len(rdata, packet, len); 2719 len += buf2_len; 2720 2721 if (!skb) { 2722 skb = xgbe_create_skb(pdata, napi, rdata, 2723 buf1_len); 2724 if (!skb) { 2725 error = 1; 2726 goto skip_data; 2727 } 2728 } 2729 2730 if (buf2_len) { 2731 dma_sync_single_range_for_cpu(pdata->dev, 2732 rdata->rx.buf.dma_base, 2733 rdata->rx.buf.dma_off, 2734 rdata->rx.buf.dma_len, 2735 DMA_FROM_DEVICE); 2736 2737 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, 2738 rdata->rx.buf.pa.pages, 2739 rdata->rx.buf.pa.pages_offset, 2740 buf2_len, 2741 rdata->rx.buf.dma_len); 2742 rdata->rx.buf.pa.pages = NULL; 2743 } 2744 } 2745 2746 skip_data: 2747 if (!last || context_next) 2748 goto read_again; 2749 2750 if (!skb) 2751 goto next_packet; 2752 2753 /* Be sure we don't exceed the configured MTU */ 2754 max_len = netdev->mtu + ETH_HLEN; 2755 if (!(netdev->features & NETIF_F_HW_VLAN_CTAG_RX) && 2756 (skb->protocol == htons(ETH_P_8021Q))) 2757 max_len += VLAN_HLEN; 2758 2759 if (skb->len > max_len) { 2760 netif_err(pdata, rx_err, netdev, 2761 "packet length exceeds configured MTU\n"); 2762 dev_kfree_skb(skb); 2763 goto next_packet; 2764 } 2765 2766 if (netif_msg_pktdata(pdata)) 2767 xgbe_print_pkt(netdev, skb, false); 2768 2769 skb_checksum_none_assert(skb); 2770 if (XGMAC_GET_BITS(packet->attributes, 2771 RX_PACKET_ATTRIBUTES, CSUM_DONE)) 2772 skb->ip_summed = CHECKSUM_UNNECESSARY; 2773 2774 if (XGMAC_GET_BITS(packet->attributes, 2775 RX_PACKET_ATTRIBUTES, TNP)) { 2776 skb->encapsulation = 1; 2777 2778 if (XGMAC_GET_BITS(packet->attributes, 2779 RX_PACKET_ATTRIBUTES, TNPCSUM_DONE)) 2780 skb->csum_level = 1; 2781 } 2782 2783 if (XGMAC_GET_BITS(packet->attributes, 2784 RX_PACKET_ATTRIBUTES, VLAN_CTAG)) 2785 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2786 packet->vlan_ctag); 2787 2788 if (XGMAC_GET_BITS(packet->attributes, 2789 RX_PACKET_ATTRIBUTES, RX_TSTAMP)) { 2790 u64 nsec; 2791 2792 nsec = timecounter_cyc2time(&pdata->tstamp_tc, 2793 packet->rx_tstamp); 2794 hwtstamps = skb_hwtstamps(skb); 2795 hwtstamps->hwtstamp = ns_to_ktime(nsec); 2796 } 2797 2798 if (XGMAC_GET_BITS(packet->attributes, 2799 RX_PACKET_ATTRIBUTES, RSS_HASH)) 2800 skb_set_hash(skb, packet->rss_hash, 2801 packet->rss_hash_type); 2802 2803 skb->dev = netdev; 2804 skb->protocol = eth_type_trans(skb, netdev); 2805 skb_record_rx_queue(skb, channel->queue_index); 2806 2807 napi_gro_receive(napi, skb); 2808 2809 next_packet: 2810 packet_count++; 2811 } 2812 2813 /* Check if we need to save state before leaving */ 2814 if (received && (!last || context_next)) { 2815 rdata = XGBE_GET_DESC_DATA(ring, ring->cur); 2816 rdata->state_saved = 1; 2817 rdata->state.skb = skb; 2818 rdata->state.len = len; 2819 rdata->state.error = error; 2820 } 2821 2822 DBGPR("<--xgbe_rx_poll: packet_count = %d\n", packet_count); 2823 2824 return packet_count; 2825 } 2826 2827 static int xgbe_one_poll(struct napi_struct *napi, int budget) 2828 { 2829 struct xgbe_channel *channel = container_of(napi, struct xgbe_channel, 2830 napi); 2831 struct xgbe_prv_data *pdata = channel->pdata; 2832 int processed = 0; 2833 2834 DBGPR("-->xgbe_one_poll: budget=%d\n", budget); 2835 2836 /* Cleanup Tx ring first */ 2837 xgbe_tx_poll(channel); 2838 2839 /* Process Rx ring next */ 2840 processed = xgbe_rx_poll(channel, budget); 2841 2842 /* If we processed everything, we are done */ 2843 if ((processed < budget) && napi_complete_done(napi, processed)) { 2844 /* Enable Tx and Rx interrupts */ 2845 if (pdata->channel_irq_mode) 2846 xgbe_enable_rx_tx_int(pdata, channel); 2847 else 2848 enable_irq(channel->dma_irq); 2849 } 2850 2851 DBGPR("<--xgbe_one_poll: received = %d\n", processed); 2852 2853 return processed; 2854 } 2855 2856 static int xgbe_all_poll(struct napi_struct *napi, int budget) 2857 { 2858 struct xgbe_prv_data *pdata = container_of(napi, struct xgbe_prv_data, 2859 napi); 2860 struct xgbe_channel *channel; 2861 int ring_budget; 2862 int processed, last_processed; 2863 unsigned int i; 2864 2865 DBGPR("-->xgbe_all_poll: budget=%d\n", budget); 2866 2867 processed = 0; 2868 ring_budget = budget / pdata->rx_ring_count; 2869 do { 2870 last_processed = processed; 2871 2872 for (i = 0; i < pdata->channel_count; i++) { 2873 channel = pdata->channel[i]; 2874 2875 /* Cleanup Tx ring first */ 2876 xgbe_tx_poll(channel); 2877 2878 /* Process Rx ring next */ 2879 if (ring_budget > (budget - processed)) 2880 ring_budget = budget - processed; 2881 processed += xgbe_rx_poll(channel, ring_budget); 2882 } 2883 } while ((processed < budget) && (processed != last_processed)); 2884 2885 /* If we processed everything, we are done */ 2886 if ((processed < budget) && napi_complete_done(napi, processed)) { 2887 /* Enable Tx and Rx interrupts */ 2888 xgbe_enable_rx_tx_ints(pdata); 2889 } 2890 2891 DBGPR("<--xgbe_all_poll: received = %d\n", processed); 2892 2893 return processed; 2894 } 2895 2896 void xgbe_dump_tx_desc(struct xgbe_prv_data *pdata, struct xgbe_ring *ring, 2897 unsigned int idx, unsigned int count, unsigned int flag) 2898 { 2899 struct xgbe_ring_data *rdata; 2900 struct xgbe_ring_desc *rdesc; 2901 2902 while (count--) { 2903 rdata = XGBE_GET_DESC_DATA(ring, idx); 2904 rdesc = rdata->rdesc; 2905 netdev_dbg(pdata->netdev, 2906 "TX_NORMAL_DESC[%d %s] = %08x:%08x:%08x:%08x\n", idx, 2907 (flag == 1) ? "QUEUED FOR TX" : "TX BY DEVICE", 2908 le32_to_cpu(rdesc->desc0), 2909 le32_to_cpu(rdesc->desc1), 2910 le32_to_cpu(rdesc->desc2), 2911 le32_to_cpu(rdesc->desc3)); 2912 idx++; 2913 } 2914 } 2915 2916 void xgbe_dump_rx_desc(struct xgbe_prv_data *pdata, struct xgbe_ring *ring, 2917 unsigned int idx) 2918 { 2919 struct xgbe_ring_data *rdata; 2920 struct xgbe_ring_desc *rdesc; 2921 2922 rdata = XGBE_GET_DESC_DATA(ring, idx); 2923 rdesc = rdata->rdesc; 2924 netdev_dbg(pdata->netdev, 2925 "RX_NORMAL_DESC[%d RX BY DEVICE] = %08x:%08x:%08x:%08x\n", 2926 idx, le32_to_cpu(rdesc->desc0), le32_to_cpu(rdesc->desc1), 2927 le32_to_cpu(rdesc->desc2), le32_to_cpu(rdesc->desc3)); 2928 } 2929 2930 void xgbe_print_pkt(struct net_device *netdev, struct sk_buff *skb, bool tx_rx) 2931 { 2932 struct ethhdr *eth = (struct ethhdr *)skb->data; 2933 unsigned char buffer[128]; 2934 unsigned int i; 2935 2936 netdev_dbg(netdev, "\n************** SKB dump ****************\n"); 2937 2938 netdev_dbg(netdev, "%s packet of %d bytes\n", 2939 (tx_rx ? "TX" : "RX"), skb->len); 2940 2941 netdev_dbg(netdev, "Dst MAC addr: %pM\n", eth->h_dest); 2942 netdev_dbg(netdev, "Src MAC addr: %pM\n", eth->h_source); 2943 netdev_dbg(netdev, "Protocol: %#06hx\n", ntohs(eth->h_proto)); 2944 2945 for (i = 0; i < skb->len; i += 32) { 2946 unsigned int len = min(skb->len - i, 32U); 2947 2948 hex_dump_to_buffer(&skb->data[i], len, 32, 1, 2949 buffer, sizeof(buffer), false); 2950 netdev_dbg(netdev, " %#06x: %s\n", i, buffer); 2951 } 2952 2953 netdev_dbg(netdev, "\n************** SKB dump ****************\n"); 2954 } 2955